Generated v2 prefixes

Interestingly this was introduced by two different PRs which were not tested
together until pre-release testing:

- Fix lfs_file_seek doesn't update cache properties correctly
- Fix compiler warnings when LFS_READONLY defined

.github/workflows/post-release.yml

@@ -0,0 +1,26 @@
+name: post-release
+on:
+  release:
+    branches: [master]
+    types: [released]
+
+jobs:
+  post-release:
+    runs-on: ubuntu-18.04
+    steps:
+      # trigger post-release in dependency repo, this indirection allows the
+      # dependency repo to be updated often without affecting this repo. At
+      # the time of this comment, the dependency repo is responsible for
+      # creating PRs for other dependent repos post-release.
+      - name: trigger-post-release
+        continue-on-error: true
+        run: |
+          curl -sS -X POST -H "authorization: token ${{secrets.BOT_TOKEN}}" \
+            "$GITHUB_API_URL/repos/${{secrets.POST_RELEASE_REPO}}/dispatches" \
+            -d "$(jq -n '{
+              event_type: "post-release",
+              client_payload: {
+                repo: env.GITHUB_REPOSITORY,
+                version: "${{github.event.release.tag_name}}"}}' \
+              | tee /dev/stderr)"
+

.github/workflows/release.yml

@@ -0,0 +1,215 @@
+name: release
+on:
+  workflow_run:
+    workflows: [test]
+    branches: [master]
+    types: [completed]
+
+jobs:
+  release:
+    runs-on: ubuntu-18.04
+
+    # need to manually check for a couple things
+    # - tests passed?
+    # - we are the most recent commit on master?
+    if: ${{github.event.workflow_run.conclusion == 'success' &&
+      github.event.workflow_run.head_sha == github.sha}}
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          ref: ${{github.event.workflow_run.head_sha}}
+          # need workflow access since we push branches
+          # containing workflows
+          token: ${{secrets.BOT_TOKEN}}
+          # need all tags
+          fetch-depth: 0
+
+      # try to get results from tests
+      - uses: dawidd6/action-download-artifact@v2
+        continue-on-error: true
+        with:
+          workflow: ${{github.event.workflow_run.name}}
+          run_id: ${{github.event.workflow_run.id}}
+          name: results
+          path: results
+
+      - name: find-version
+        run: |
+          # rip version from lfs2.h
+          LFS2_VERSION="$(grep -o '^#define LFS2_VERSION .*$' lfs2.h \
+            | awk '{print $3}')"
+          LFS2_VERSION_MAJOR="$((0xffff & ($LFS2_VERSION >> 16)))"
+          LFS2_VERSION_MINOR="$((0xffff & ($LFS2_VERSION >>  0)))"
+
+          # find a new patch version based on what we find in our tags
+          LFS2_VERSION_PATCH="$( \
+            ( git describe --tags --abbrev=0 \
+                --match="v$LFS2_VERSION_MAJOR.$LFS2_VERSION_MINOR.*" \
+              || echo 'v0.0.-1' ) \
+            | awk -F '.' '{print $3+1}')"
+
+          # found new version
+          LFS2_VERSION="v$LFS2_VERSION_MAJOR`
+            `.$LFS2_VERSION_MINOR`
+            `.$LFS2_VERSION_PATCH"
+          echo "LFS2_VERSION=$LFS2_VERSION"
+          echo "LFS2_VERSION=$LFS2_VERSION" >> $GITHUB_ENV
+          echo "LFS2_VERSION_MAJOR=$LFS2_VERSION_MAJOR" >> $GITHUB_ENV
+          echo "LFS2_VERSION_MINOR=$LFS2_VERSION_MINOR" >> $GITHUB_ENV
+          echo "LFS2_VERSION_PATCH=$LFS2_VERSION_PATCH" >> $GITHUB_ENV
+
+      # try to find previous version?
+      - name: find-prev-version
+        continue-on-error: true
+        run: |
+          LFS2_PREV_VERSION="$(git describe --tags --abbrev=0 --match 'v*')"
+          echo "LFS2_PREV_VERSION=$LFS2_PREV_VERSION"
+          echo "LFS2_PREV_VERSION=$LFS2_PREV_VERSION" >> $GITHUB_ENV
+
+      # try to find results from tests
+      - name: collect-results
+        run: |
+          # previous results to compare against?
+          [ -n "$LFS2_PREV_VERSION" ] && curl -sS \
+            "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/`
+              `status/$LFS2_PREV_VERSION" \
+            | jq -re 'select(.sha != env.GITHUB_SHA) | .statuses[]' \
+            >> prev-results.json \
+            || true
+
+          # unfortunately these each have their own format
+          [ -e results/code-thumb.csv ] && ( \
+            export PREV="$(jq -re '
+                  select(.context == "results / code").description
+                  | capture("Code size is (?<result>[0-9]+)").result' \
+                prev-results.json || echo 0)"
+            ./scripts/code.py -u results/code-thumb.csv -s | awk '
+              NR==2 {printf "Code size,%d B",$2}
+              NR==2 && ENVIRON["PREV"]+0 != 0 {
+                printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}
+              NR==2 {printf "\n"}' \
+            >> results.csv)
+          [ -e results/code-thumb-readonly.csv ] && ( \
+            export PREV="$(jq -re '
+                  select(.context == "results / code (readonly)").description
+                  | capture("Code size is (?<result>[0-9]+)").result' \
+                prev-results.json || echo 0)"
+            ./scripts/code.py -u results/code-thumb-readonly.csv -s | awk '
+              NR==2 {printf "Code size<br/>(readonly),%d B",$2}
+              NR==2 && ENVIRON["PREV"]+0 != 0 {
+                printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}
+              NR==2 {printf "\n"}' \
+            >> results.csv)
+          [ -e results/code-thumb-threadsafe.csv ] && ( \
+            export PREV="$(jq -re '
+                  select(.context == "results / code (threadsafe)").description
+                  | capture("Code size is (?<result>[0-9]+)").result' \
+                prev-results.json || echo 0)"
+            ./scripts/code.py -u results/code-thumb-threadsafe.csv -s | awk '
+              NR==2 {printf "Code size<br/>(threadsafe),%d B",$2}
+              NR==2 && ENVIRON["PREV"]+0 != 0 {
+                printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}
+              NR==2 {printf "\n"}' \
+            >> results.csv)
+          [ -e results/code-thumb-migrate.csv ] && ( \
+            export PREV="$(jq -re '
+                  select(.context == "results / code (migrate)").description
+                  | capture("Code size is (?<result>[0-9]+)").result' \
+                prev-results.json || echo 0)"
+            ./scripts/code.py -u results/code-thumb-migrate.csv -s | awk '
+              NR==2 {printf "Code size<br/>(migrate),%d B",$2}
+              NR==2 && ENVIRON["PREV"]+0 != 0 {
+                printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}
+              NR==2 {printf "\n"}' \
+            >> results.csv)
+          [ -e results/code-thumb-error-asserts.csv ] && ( \
+            export PREV="$(jq -re '
+                  select(.context == "results / code (error-asserts)").description
+                  | capture("Code size is (?<result>[0-9]+)").result' \
+                prev-results.json || echo 0)"
+            ./scripts/code.py -u results/code-thumb-error-asserts.csv -s | awk '
+              NR==2 {printf "Code size<br/>(error-asserts),%d B",$2}
+              NR==2 && ENVIRON["PREV"]+0 != 0 {
+                printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}
+              NR==2 {printf "\n"}' \
+            >> results.csv)
+          [ -e results/coverage.csv ] && ( \
+            export PREV="$(jq -re '
+                  select(.context == "results / coverage").description
+                  | capture("Coverage is (?<result>[0-9\\.]+)").result' \
+                prev-results.json || echo 0)"
+            ./scripts/coverage.py -u results/coverage.csv -s | awk -F '[ /%]+' '
+              NR==2 {printf "Coverage,%.1f%% of %d lines",$4,$3}
+              NR==2 && ENVIRON["PREV"]+0 != 0 {
+                printf " (%+.1f%%)",$4-ENVIRON["PREV"]}
+              NR==2 {printf "\n"}' \
+            >> results.csv)
+
+          # transpose to GitHub table
+          [ -e results.csv ] || exit 0
+          awk -F ',' '
+            {label[NR]=$1; value[NR]=$2}
+            END {
+              for (r=1; r<=NR; r++) {printf "| %s ",label[r]}; printf "|\n";
+              for (r=1; r<=NR; r++) {printf "|:--"}; printf "|\n";
+              for (r=1; r<=NR; r++) {printf "| %s ",value[r]}; printf "|\n"}' \
+            results.csv > results.txt
+          echo "RESULTS:"
+          cat results.txt
+
+      # find changes from history
+      - name: collect-changes
+        run: |
+          [ -n "$LFS2_PREV_VERSION" ] || exit 0
+          # use explicit link to github commit so that release notes can
+          # be copied elsewhere
+          git log "$LFS2_PREV_VERSION.." \
+            --grep='^Merge' --invert-grep \
+            --format="format:[\`%h\`](`
+              `https://github.com/$GITHUB_REPOSITORY/commit/%h) %s" \
+            > changes.txt
+          echo "CHANGES:"
+          cat changes.txt
+
+      # create and update major branches (vN and vN-prefix)
+      - name: create-major-branches
+        run: |
+          # create major branch
+          git branch "v$LFS2_VERSION_MAJOR" HEAD
+
+          # create major prefix branch
+          git config user.name ${{secrets.BOT_USER}}
+          git config user.email ${{secrets.BOT_EMAIL}}
+          git fetch "https://github.com/$GITHUB_REPOSITORY.git" \
+            "v$LFS2_VERSION_MAJOR-prefix" || true
+          ./scripts/prefix.py "lfs2$LFS2_VERSION_MAJOR"
+          git branch "v$LFS2_VERSION_MAJOR-prefix" $( \
+            git commit-tree $(git write-tree) \
+              $(git rev-parse --verify -q FETCH_HEAD | sed -e 's/^/-p /') \
+              -p HEAD \
+              -m "Generated v$LFS2_VERSION_MAJOR prefixes")
+          git reset --hard
+
+          # push!
+          git push --atomic origin \
+            "v$LFS2_VERSION_MAJOR" \
+            "v$LFS2_VERSION_MAJOR-prefix"
+
+      # build release notes
+      - name: create-release
+        run: |
+          # create release and patch version tag (vN.N.N)
+          # only draft if not a patch release
+          [ -e results.txt ] && export RESULTS="$(cat results.txt)"
+          [ -e changes.txt ] && export CHANGES="$(cat changes.txt)"
+          curl -sS -X POST -H "authorization: token ${{secrets.BOT_TOKEN}}" \
+            "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/releases" \
+            -d "$(jq -n '{
+              tag_name: env.LFS2_VERSION,
+              name: env.LFS2_VERSION | rtrimstr(".0"),
+              target_commitish: "${{github.event.workflow_run.head_sha}}",
+              draft: env.LFS2_VERSION | endswith(".0"),
+              body: [env.RESULTS, env.CHANGES | select(.)] | join("\n\n")}' \
+              | tee /dev/stderr)"
+

.github/workflows/status.yml

@@ -0,0 +1,55 @@
+name: status
+on:
+  workflow_run:
+    workflows: [test]
+    types: [completed]
+
+jobs:
+  status:
+    runs-on: ubuntu-18.04
+    steps:
+      # custom statuses?
+      - uses: dawidd6/action-download-artifact@v2
+        continue-on-error: true
+        with:
+          workflow: ${{github.event.workflow_run.name}}
+          run_id: ${{github.event.workflow_run.id}}
+          name: status
+          path: status
+      - name: update-status
+        continue-on-error: true
+        run: |
+          ls status
+          for s in $(shopt -s nullglob ; echo status/*.json)
+          do
+            # parse requested status
+            export STATE="$(jq -er '.state' $s)"
+            export CONTEXT="$(jq -er '.context' $s)"
+            export DESCRIPTION="$(jq -er '.description' $s)"
+            # help lookup URL for job/steps because GitHub makes
+            # it VERY HARD to link to specific jobs
+            export TARGET_URL="$(
+              jq -er '.target_url // empty' $s || (
+                export TARGET_JOB="$(jq -er '.target_job' $s)"
+                export TARGET_STEP="$(jq -er '.target_step // ""' $s)"
+                curl -sS -H "authorization: token ${{secrets.BOT_TOKEN}}" \
+                  "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/actions/runs/`
+                    `${{github.event.workflow_run.id}}/jobs" \
+                  | jq -er '.jobs[]
+                    | select(.name == env.TARGET_JOB)
+                    | .html_url
+                      + "?check_suite_focus=true"
+                      + ((.steps[]
+                        | select(.name == env.TARGET_STEP)
+                        | "#step:\(.number):0") // "")'))"
+            # update status
+            curl -sS -X POST -H "authorization: token ${{secrets.BOT_TOKEN}}" \
+              "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/statuses/`
+                `${{github.event.workflow_run.head_sha}}" \
+              -d "$(jq -n '{
+                state: env.STATE,
+                context: env.CONTEXT,
+                description: env.DESCRIPTION,
+                target_url: env.TARGET_URL}' \
+                | tee /dev/stderr)"
+          done

.github/workflows/test.yml

@@ -0,0 +1,446 @@
+name: test
+on: [push, pull_request]
+
+env:
+  CFLAGS: -Werror
+  MAKEFLAGS: -j
+
+jobs:
+  # run tests
+  test:
+    runs-on: ubuntu-18.04
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [x86_64, thumb, mips, powerpc]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: install
+        run: |
+          # need toml, also pip3 isn't installed by default?
+          sudo apt-get update -qq
+          sudo apt-get install -qq python3 python3-pip lcov
+          sudo pip3 install toml
+          gcc --version
+
+          # setup a ram-backed disk to speed up reentrant tests
+          mkdir disks
+          sudo mount -t tmpfs -o size=100m tmpfs disks
+          TESTFLAGS="$TESTFLAGS --disk=disks/disk"
+
+          # collect coverage
+          mkdir -p coverage
+          TESTFLAGS="$TESTFLAGS --coverage=`
+            `coverage/${{github.job}}-${{matrix.arch}}.info"
+
+          echo "TESTFLAGS=$TESTFLAGS" >> $GITHUB_ENV
+
+      # cross-compile with ARM Thumb (32-bit, little-endian)
+      - name: install-thumb
+        if: ${{matrix.arch == 'thumb'}}
+        run: |
+          sudo apt-get install -qq \
+            gcc-arm-linux-gnueabi \
+            libc6-dev-armel-cross \
+            qemu-user
+          echo "CC=arm-linux-gnueabi-gcc -mthumb --static" >> $GITHUB_ENV
+          echo "EXEC=qemu-arm" >> $GITHUB_ENV
+          arm-linux-gnueabi-gcc --version
+          qemu-arm -version
+      # cross-compile with MIPS (32-bit, big-endian)
+      - name: install-mips
+        if: ${{matrix.arch == 'mips'}}
+        run: |
+          sudo apt-get install -qq \
+            gcc-mips-linux-gnu \
+            libc6-dev-mips-cross \
+            qemu-user
+          echo "CC=mips-linux-gnu-gcc --static" >> $GITHUB_ENV
+          echo "EXEC=qemu-mips" >> $GITHUB_ENV
+          mips-linux-gnu-gcc --version
+          qemu-mips -version
+      # cross-compile with PowerPC (32-bit, big-endian)
+      - name: install-powerpc
+        if: ${{matrix.arch == 'powerpc'}}
+        run: |
+          sudo apt-get install -qq \
+            gcc-powerpc-linux-gnu \
+            libc6-dev-powerpc-cross \
+            qemu-user
+          echo "CC=powerpc-linux-gnu-gcc --static" >> $GITHUB_ENV
+          echo "EXEC=qemu-ppc" >> $GITHUB_ENV
+          powerpc-linux-gnu-gcc --version
+          qemu-ppc -version
+
+      # make sure example can at least compile
+      - name: test-example
+        run: |
+          sed -n '/``` c/,/```/{/```/d; p}' README.md > test.c
+          make all CFLAGS+=" \
+            -Duser_provided_block_device_read=NULL \
+            -Duser_provided_block_device_prog=NULL \
+            -Duser_provided_block_device_erase=NULL \
+            -Duser_provided_block_device_sync=NULL \
+            -include stdio.h"
+          rm test.c
+
+      # test configurations
+      # normal+reentrant tests
+      - name: test-default
+        run: |
+          make clean
+          make test TESTFLAGS+="-nrk"
+      # NOR flash: read/prog = 1 block = 4KiB
+      - name: test-nor
+        run: |
+          make clean
+          make test TESTFLAGS+="-nrk \
+            -DLFS2_READ_SIZE=1 -DLFS2_BLOCK_SIZE=4096"
+      # SD/eMMC: read/prog = 512 block = 512
+      - name: test-emmc
+        run: |
+          make clean
+          make test TESTFLAGS+="-nrk \
+            -DLFS2_READ_SIZE=512 -DLFS2_BLOCK_SIZE=512"
+      # NAND flash: read/prog = 4KiB block = 32KiB
+      - name: test-nand
+        run: |
+          make clean
+          make test TESTFLAGS+="-nrk \
+            -DLFS2_READ_SIZE=4096 -DLFS2_BLOCK_SIZE=\(32*1024\)"
+      # other extreme geometries that are useful for various corner cases
+      - name: test-no-intrinsics
+        run: |
+          make clean
+          make test TESTFLAGS+="-nrk \
+            -DLFS2_NO_INTRINSICS"
+      - name: test-byte-writes
+        # it just takes too long to test byte-level writes when in qemu,
+        # should be plenty covered by the other configurations
+        if: ${{matrix.arch == 'x86_64'}}
+        run: |
+          make clean
+          make test TESTFLAGS+="-nrk \
+            -DLFS2_READ_SIZE=1 -DLFS2_CACHE_SIZE=1"
+      - name: test-block-cycles
+        run: |
+          make clean
+          make test TESTFLAGS+="-nrk \
+            -DLFS2_BLOCK_CYCLES=1"
+      - name: test-odd-block-count
+        run: |
+          make clean
+          make test TESTFLAGS+="-nrk \
+            -DLFS2_BLOCK_COUNT=1023 -DLFS2_LOOKAHEAD_SIZE=256"
+      - name: test-odd-block-size
+        run: |
+          make clean
+          make test TESTFLAGS+="-nrk \
+            -DLFS2_READ_SIZE=11 -DLFS2_BLOCK_SIZE=704"
+
+      # upload coverage for later coverage
+      - name: upload-coverage
+        uses: actions/upload-artifact@v2
+        with:
+          name: coverage
+          path: coverage
+          retention-days: 1
+
+      # update results
+      - name: results-code
+        run: |
+          mkdir -p results
+          make clean
+          make code \
+            CFLAGS+=" \
+              -DLFS2_NO_ASSERT \
+              -DLFS2_NO_DEBUG \
+              -DLFS2_NO_WARN \
+              -DLFS2_NO_ERROR" \
+            CODEFLAGS+="-o results/code-${{matrix.arch}}.csv"
+      - name: results-code-readonly
+        run: |
+          mkdir -p results
+          make clean
+          make code \
+            CFLAGS+=" \
+              -DLFS2_NO_ASSERT \
+              -DLFS2_NO_DEBUG \
+              -DLFS2_NO_WARN \
+              -DLFS2_NO_ERROR \
+              -DLFS2_READONLY" \
+            CODEFLAGS+="-o results/code-${{matrix.arch}}-readonly.csv"
+      - name: results-code-threadsafe
+        run: |
+          mkdir -p results
+          make clean
+          make code \
+            CFLAGS+=" \
+              -DLFS2_NO_ASSERT \
+              -DLFS2_NO_DEBUG \
+              -DLFS2_NO_WARN \
+              -DLFS2_NO_ERROR \
+              -DLFS2_THREADSAFE" \
+            CODEFLAGS+="-o results/code-${{matrix.arch}}-threadsafe.csv"
+      - name: results-code-migrate
+        run: |
+          mkdir -p results
+          make clean
+          make code \
+            CFLAGS+=" \
+              -DLFS2_NO_ASSERT \
+              -DLFS2_NO_DEBUG \
+              -DLFS2_NO_WARN \
+              -DLFS2_NO_ERROR \
+              -DLFS2_MIGRATE" \
+            CODEFLAGS+="-o results/code-${{matrix.arch}}-migrate.csv"
+      - name: results-code-error-asserts
+        run: |
+          mkdir -p results
+          make clean
+          make code \
+            CFLAGS+=" \
+              -DLFS2_NO_DEBUG \
+              -DLFS2_NO_WARN \
+              -DLFS2_NO_ERROR \
+              -D'LFS2_ASSERT(test)=do {if(!(test)) {return -1;}} while(0)'" \
+            CODEFLAGS+="-o results/code-${{matrix.arch}}-error-asserts.csv"
+      - name: upload-results
+        uses: actions/upload-artifact@v2
+        with:
+          name: results
+          path: results
+      # limit reporting to Thumb, otherwise there would be too many numbers
+      # flying around for the results to be easily readable
+      - name: collect-status
+        if: ${{matrix.arch == 'thumb'}}
+        run: |
+          mkdir -p status
+          for f in $(shopt -s nullglob ; echo results/code*.csv)
+          do
+            export STEP="results-code$(
+              echo $f | sed -n 's/.*code-.*-\(.*\).csv/-\1/p')"
+            export CONTEXT="results / code$(
+              echo $f | sed -n 's/.*code-.*-\(.*\).csv/ (\1)/p')"
+            export PREV="$(curl -sS \
+              "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/status/master" \
+              | jq -re 'select(.sha != env.GITHUB_SHA) | .statuses[]
+                | select(.context == env.CONTEXT).description
+                | capture("Code size is (?<result>[0-9]+)").result' \
+              || echo 0)"
+            export DESCRIPTION="$(./scripts/code.py -u $f -s | awk '
+              NR==2 {printf "Code size is %d B",$2}
+              NR==2 && ENVIRON["PREV"]+0 != 0 {
+                printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}')"
+            jq -n '{
+              state: "success",
+              context: env.CONTEXT,
+              description: env.DESCRIPTION,
+              target_job: "${{github.job}} (${{matrix.arch}})",
+              target_step: env.STEP}' \
+              | tee status/code$(
+                echo $f | sed -n 's/.*code-.*-\(.*\).csv/-\1/p').json
+          done
+      - name: upload-status
+        if: ${{matrix.arch == 'thumb'}}
+        uses: actions/upload-artifact@v2
+        with:
+          name: status
+          path: status
+          retention-days: 1
+
+  # run under Valgrind to check for memory errors
+  valgrind:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: install
+        run: |
+          # need toml, also pip3 isn't installed by default?
+          sudo apt-get update -qq
+          sudo apt-get install -qq python3 python3-pip
+          sudo pip3 install toml
+      - name: install-valgrind
+        run: |
+          sudo apt-get update -qq
+          sudo apt-get install -qq valgrind
+          valgrind --version
+      # normal tests, we don't need to test all geometries
+      - name: test-valgrind
+        run: make test TESTFLAGS+="-k --valgrind"
+
+  # self-host with littlefs-fuse for a fuzz-like test
+  fuse:
+    runs-on: ubuntu-18.04
+    if: ${{!endsWith(github.ref, '-prefix')}}
+    steps:
+      - uses: actions/checkout@v2
+      - name: install
+        run: |
+          # need toml, also pip3 isn't installed by default?
+          sudo apt-get update -qq
+          sudo apt-get install -qq python3 python3-pip libfuse-dev
+          sudo pip3 install toml
+          fusermount -V
+          gcc --version
+      - uses: actions/checkout@v2
+        with:
+          repository: littlefs-project/littlefs-fuse
+          ref: v2
+          path: littlefs-fuse
+      - name: setup
+        run: |
+          # copy our new version into littlefs-fuse
+          rm -rf littlefs-fuse/littlefs/*
+          cp -r $(git ls-tree --name-only HEAD) littlefs-fuse/littlefs
+
+          # setup disk for littlefs-fuse
+          mkdir mount
+          sudo chmod a+rw /dev/loop0
+          dd if=/dev/zero bs=512 count=128K of=disk
+          losetup /dev/loop0 disk
+      - name: test
+        run: |
+          # self-host test
+          make -C littlefs-fuse
+
+          littlefs-fuse/lfs2 --format /dev/loop0
+          littlefs-fuse/lfs2 /dev/loop0 mount
+
+          ls mount
+          mkdir mount/littlefs
+          cp -r $(git ls-tree --name-only HEAD) mount/littlefs
+          cd mount/littlefs
+          stat .
+          ls -flh
+          make -B test
+
+  # test migration using littlefs-fuse
+  migrate:
+    runs-on: ubuntu-18.04
+    if: ${{!endsWith(github.ref, '-prefix')}}
+    steps:
+      - uses: actions/checkout@v2
+      - name: install
+        run: |
+          # need toml, also pip3 isn't installed by default?
+          sudo apt-get update -qq
+          sudo apt-get install -qq python3 python3-pip libfuse-dev
+          sudo pip3 install toml
+          fusermount -V
+          gcc --version
+      - uses: actions/checkout@v2
+        with:
+          repository: littlefs-project/littlefs-fuse
+          ref: v2
+          path: v2
+      - uses: actions/checkout@v2
+        with:
+          repository: littlefs-project/littlefs-fuse
+          ref: v1
+          path: v1
+      - name: setup
+        run: |
+          # copy our new version into littlefs-fuse
+          rm -rf v2/littlefs/*
+          cp -r $(git ls-tree --name-only HEAD) v2/littlefs
+
+          # setup disk for littlefs-fuse
+          mkdir mount
+          sudo chmod a+rw /dev/loop0
+          dd if=/dev/zero bs=512 count=128K of=disk
+          losetup /dev/loop0 disk
+      - name: test
+        run: |
+          # compile v1 and v2
+          make -C v1
+          make -C v2
+
+          # run self-host test with v1
+          v1/lfs2 --format /dev/loop0
+          v1/lfs2 /dev/loop0 mount
+
+          ls mount
+          mkdir mount/littlefs
+          cp -r $(git ls-tree --name-only HEAD) mount/littlefs
+          cd mount/littlefs
+          stat .
+          ls -flh
+          make -B test
+
+          # attempt to migrate
+          cd ../..
+          fusermount -u mount
+
+          v2/lfs2 --migrate /dev/loop0
+          v2/lfs2 /dev/loop0 mount
+
+          # run self-host test with v2 right where we left off
+          ls mount
+          cd mount/littlefs
+          stat .
+          ls -flh
+          make -B test
+
+  # collect coverage info
+  coverage:
+    runs-on: ubuntu-18.04
+    needs: [test]
+    steps:
+      - uses: actions/checkout@v2
+      - name: install
+        run: |
+          sudo apt-get update -qq
+          sudo apt-get install -qq python3 python3-pip lcov
+          sudo pip3 install toml
+      # yes we continue-on-error nearly every step, continue-on-error
+      # at job level apparently still marks a job as failed, which isn't
+      # what we want
+      - uses: actions/download-artifact@v2
+        continue-on-error: true
+        with:
+          name: coverage
+          path: coverage
+      - name: results-coverage
+        continue-on-error: true
+        run: |
+          mkdir -p results
+          lcov $(for f in coverage/*.info ; do echo "-a $f" ; done) \
+            -o results/coverage.info
+          ./scripts/coverage.py results/coverage.info -o results/coverage.csv
+      - name: upload-results
+        uses: actions/upload-artifact@v2
+        with:
+          name: results
+          path: results
+      - name: collect-status
+        run: |
+          mkdir -p status
+          [ -e results/coverage.csv ] || exit 0
+          export STEP="results-coverage"
+          export CONTEXT="results / coverage"
+          export PREV="$(curl -sS \
+            "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/status/master" \
+            | jq -re 'select(.sha != env.GITHUB_SHA) | .statuses[]
+              | select(.context == env.CONTEXT).description
+              | capture("Coverage is (?<result>[0-9\\.]+)").result' \
+            || echo 0)"
+          export DESCRIPTION="$(
+            ./scripts/coverage.py -u results/coverage.csv -s | awk -F '[ /%]+' '
+              NR==2 {printf "Coverage is %.1f%% of %d lines",$4,$3}
+              NR==2 && ENVIRON["PREV"]+0 != 0 {
+                printf " (%+.1f%%)",$4-ENVIRON["PREV"]}')"
+          jq -n '{
+            state: "success",
+            context: env.CONTEXT,
+            description: env.DESCRIPTION,
+            target_job: "${{github.job}}",
+            target_step: env.STEP}' \
+            | tee status/coverage.json
+      - name: upload-status
+        uses: actions/upload-artifact@v2
+        with:
+          name: status
+          path: status
+          retention-days: 1

.gitignore

@@ -5,6 +5,8 @@
 
 # Testing things
 blocks/
-lfs
+lfs2
 test.c
 tests/*.toml.*
+scripts/__pycache__
+.gdb_history

.travis.yml

@@ -1,429 +0,0 @@
-# environment variables
-env:
-  global:
-    - CFLAGS=-Werror
-    - MAKEFLAGS=-j
-
-# cache installation dirs
-cache:
-  pip: true
-  directories:
-    - $HOME/.cache/apt
-
-# common installation
-_: &install-common
-  # need toml, also pip3 isn't installed by default?
-  - sudo apt-get install python3 python3-pip
-  - sudo pip3 install toml
-  # setup a ram-backed disk to speed up reentrant tests
-  - mkdir disks
-  - sudo mount -t tmpfs -o size=100m tmpfs disks
-  - export TFLAGS="$TFLAGS --disk=disks/disk"
-
-# test cases
-_: &test-example
-  # make sure example can at least compile
-  - sed -n '/``` c/,/```/{/```/d; p}' README.md > test.c &&
-    make all CFLAGS+="
-        -Duser_provided_block_device_read=NULL
-        -Duser_provided_block_device_prog=NULL
-        -Duser_provided_block_device_erase=NULL
-        -Duser_provided_block_device_sync=NULL
-        -include stdio.h"
-# default tests
-_: &test-default
-  # normal+reentrant tests
-  - make test TFLAGS+="-nrk"
-# common real-life geometries
-_: &test-nor
-  # NOR flash: read/prog = 1 block = 4KiB
-  - make test TFLAGS+="-nrk -DLFS_READ_SIZE=1 -DLFS_BLOCK_SIZE=4096"
-_: &test-emmc
-  # eMMC: read/prog = 512 block = 512
-  - make test TFLAGS+="-nrk -DLFS_READ_SIZE=512 -DLFS_BLOCK_SIZE=512"
-_: &test-nand
-  # NAND flash: read/prog = 4KiB block = 32KiB
-  - make test TFLAGS+="-nrk -DLFS_READ_SIZE=4096 -DLFS_BLOCK_SIZE=\(32*1024\)"
-# other extreme geometries that are useful for testing various corner cases
-_: &test-no-intrinsics
-  - make test TFLAGS+="-nrk -DLFS_NO_INTRINSICS"
-_: &test-no-inline
-  - make test TFLAGS+="-nrk -DLFS_INLINE_MAX=0"
-_: &test-byte-writes
-  - make test TFLAGS+="-nrk -DLFS_READ_SIZE=1 -DLFS_CACHE_SIZE=1"
-_: &test-block-cycles
-  - make test TFLAGS+="-nrk -DLFS_BLOCK_CYCLES=1"
-_: &test-odd-block-count
-  - make test TFLAGS+="-nrk -DLFS_BLOCK_COUNT=1023 -DLFS_LOOKAHEAD_SIZE=256"
-_: &test-odd-block-size
-  - make test TFLAGS+="-nrk -DLFS_READ_SIZE=11 -DLFS_BLOCK_SIZE=704"
-
-# report size 
-_: &report-size
-  # compile and find the code size with the smallest configuration
-  - make -j1 clean size
-        OBJ="$(ls lfs*.c | sed 's/\.c/\.o/' | tr '\n' ' ')"
-        CFLAGS+="-DLFS_NO_ASSERT -DLFS_NO_DEBUG -DLFS_NO_WARN -DLFS_NO_ERROR"
-        | tee sizes
-  # update status if we succeeded, compare with master if possible
-  - |
-    if [ "$TRAVIS_TEST_RESULT" -eq 0 ]
-    then
-        CURR=$(tail -n1 sizes | awk '{print $1}')
-        PREV=$(curl -u "$GEKY_BOT_STATUSES" https://api.github.com/repos/$TRAVIS_REPO_SLUG/status/master \
-            | jq -re "select(.sha != \"$TRAVIS_COMMIT\")
-                | .statuses[] | select(.context == \"${TRAVIS_BUILD_STAGE_NAME,,}/$NAME\").description
-                | capture(\"code size is (?<size>[0-9]+)\").size" \
-            || echo 0)
-  
-        STATUS="Passed, code size is ${CURR}B"
-        if [ "$PREV" -ne 0 ]
-        then
-            STATUS="$STATUS ($(python -c "print '%+.2f' % (100*($CURR-$PREV)/$PREV.0)")%)"
-        fi
-    fi
-
-# stage control
-stages:
-  - name: test
-  - name: deploy
-    if: branch = master AND type = push
-
-# job control
-jobs:
-  # native testing
-  - &x86
-    stage: test
-    env:
-      - NAME=littlefs-x86
-    install: *install-common
-    script: [*test-example, *report-size]
-  - {<<: *x86, script: [*test-default,          *report-size]}
-  - {<<: *x86, script: [*test-nor,              *report-size]}
-  - {<<: *x86, script: [*test-emmc,             *report-size]}
-  - {<<: *x86, script: [*test-nand,             *report-size]}
-  - {<<: *x86, script: [*test-no-intrinsics,    *report-size]}
-  - {<<: *x86, script: [*test-no-inline,        *report-size]}
-  - {<<: *x86, script: [*test-byte-writes,      *report-size]}
-  - {<<: *x86, script: [*test-block-cycles,     *report-size]}
-  - {<<: *x86, script: [*test-odd-block-count,  *report-size]}
-  - {<<: *x86, script: [*test-odd-block-size,   *report-size]}
-
-  # cross-compile with ARM (thumb mode)
-  - &arm
-    stage: test
-    env:
-      - NAME=littlefs-arm
-      - CC="arm-linux-gnueabi-gcc --static -mthumb"
-      - TFLAGS="$TFLAGS --exec=qemu-arm"
-    install:
-      - *install-common
-      - sudo apt-get install
-            gcc-arm-linux-gnueabi
-            libc6-dev-armel-cross
-            qemu-user
-      - arm-linux-gnueabi-gcc --version
-      - qemu-arm -version
-    script: [*test-example, *report-size]
-  - {<<: *arm, script: [*test-default,          *report-size]}
-  - {<<: *arm, script: [*test-nor,              *report-size]}
-  - {<<: *arm, script: [*test-emmc,             *report-size]}
-  - {<<: *arm, script: [*test-nand,             *report-size]}
-  - {<<: *arm, script: [*test-no-intrinsics,    *report-size]}
-  - {<<: *arm, script: [*test-no-inline,        *report-size]}
-  # it just takes way to long to run byte-level writes in qemu,
-  # note this is still tested in the native tests
-  #- {<<: *arm, script: [*test-byte-writes,      *report-size]}
-  - {<<: *arm, script: [*test-block-cycles,     *report-size]}
-  - {<<: *arm, script: [*test-odd-block-count,  *report-size]}
-  - {<<: *arm, script: [*test-odd-block-size,   *report-size]}
-
-  # cross-compile with MIPS
-  - &mips
-    stage: test
-    env:
-      - NAME=littlefs-mips
-      - CC="mips-linux-gnu-gcc --static"
-      - TFLAGS="$TFLAGS --exec=qemu-mips"
-    install:
-      - *install-common
-      - sudo apt-get install
-            gcc-mips-linux-gnu
-            libc6-dev-mips-cross
-            qemu-user
-      - mips-linux-gnu-gcc --version
-      - qemu-mips -version
-    script: [*test-example, *report-size]
-  - {<<: *mips, script: [*test-default,          *report-size]}
-  - {<<: *mips, script: [*test-nor,              *report-size]}
-  - {<<: *mips, script: [*test-emmc,             *report-size]}
-  - {<<: *mips, script: [*test-nand,             *report-size]}
-  - {<<: *mips, script: [*test-no-intrinsics,    *report-size]}
-  - {<<: *mips, script: [*test-no-inline,        *report-size]}
-  # it just takes way to long to run byte-level writes in qemu,
-  # note this is still tested in the native tests
-  #- {<<: *mips, script: [*test-byte-writes,      *report-size]}
-  - {<<: *mips, script: [*test-block-cycles,     *report-size]}
-  - {<<: *mips, script: [*test-odd-block-count,  *report-size]}
-  - {<<: *mips, script: [*test-odd-block-size,   *report-size]}
-
-  # cross-compile with PowerPC
-  - &powerpc
-    stage: test
-    env:
-      - NAME=littlefs-powerpc
-      - CC="powerpc-linux-gnu-gcc --static"
-      - TFLAGS="$TFLAGS --exec=qemu-ppc"
-    install:
-      - *install-common
-      - sudo apt-get install
-            gcc-powerpc-linux-gnu
-            libc6-dev-powerpc-cross
-            qemu-user
-      - powerpc-linux-gnu-gcc --version
-      - qemu-ppc -version
-    script: [*test-example, *report-size]
-  - {<<: *powerpc, script: [*test-default,          *report-size]}
-  - {<<: *powerpc, script: [*test-nor,              *report-size]}
-  - {<<: *powerpc, script: [*test-emmc,             *report-size]}
-  - {<<: *powerpc, script: [*test-nand,             *report-size]}
-  - {<<: *powerpc, script: [*test-no-intrinsics,    *report-size]}
-  - {<<: *powerpc, script: [*test-no-inline,        *report-size]}
-  # it just takes way to long to run byte-level writes in qemu,
-  # note this is still tested in the native tests
-  #- {<<: *powerpc, script: [*test-byte-writes,      *report-size]}
-  - {<<: *powerpc, script: [*test-block-cycles,     *report-size]}
-  - {<<: *powerpc, script: [*test-odd-block-count,  *report-size]}
-  - {<<: *powerpc, script: [*test-odd-block-size,   *report-size]}
-
-  # test under valgrind, checking for memory errors
-  - &valgrind
-    stage: test
-    env:
-      - NAME=littlefs-valgrind
-    install:
-      - *install-common
-      - sudo apt-get install valgrind
-      - valgrind --version
-    script:
-      - make test TFLAGS+="-k --valgrind"
-
-  # self-host with littlefs-fuse for fuzz test
-  - stage: test
-    env:
-      - NAME=littlefs-fuse
-    if: branch !~ -prefix$
-    install:
-      - *install-common
-      - sudo apt-get install libfuse-dev
-      - git clone --depth 1 https://github.com/geky/littlefs-fuse -b v2
-      - fusermount -V
-      - gcc --version
-
-      # setup disk for littlefs-fuse
-      - rm -rf littlefs-fuse/littlefs/*
-      - cp -r $(git ls-tree --name-only HEAD) littlefs-fuse/littlefs
-
-      - mkdir mount
-      - sudo chmod a+rw /dev/loop0
-      - dd if=/dev/zero bs=512 count=128K of=disk
-      - losetup /dev/loop0 disk
-    script:
-      # self-host test
-      - make -C littlefs-fuse
-
-      - littlefs-fuse/lfs --format /dev/loop0
-      - littlefs-fuse/lfs /dev/loop0 mount
-
-      - ls mount
-      - mkdir mount/littlefs
-      - cp -r $(git ls-tree --name-only HEAD) mount/littlefs
-      - cd mount/littlefs
-      - stat .
-      - ls -flh
-      - make -B test
-
-  # test migration using littlefs-fuse
-  - stage: test
-    env:
-      - NAME=littlefs-migration
-    if: branch !~ -prefix$
-    install:
-      - *install-common
-      - sudo apt-get install libfuse-dev
-      - git clone --depth 1 https://github.com/geky/littlefs-fuse -b v2 v2
-      - git clone --depth 1 https://github.com/geky/littlefs-fuse -b v1 v1
-      - fusermount -V
-      - gcc --version
-
-      # setup disk for littlefs-fuse
-      - rm -rf v2/littlefs/*
-      - cp -r $(git ls-tree --name-only HEAD) v2/littlefs
-
-      - mkdir mount
-      - sudo chmod a+rw /dev/loop0
-      - dd if=/dev/zero bs=512 count=128K of=disk
-      - losetup /dev/loop0 disk
-    script:
-      # compile v1 and v2
-      - make -C v1
-      - make -C v2
-
-      # run self-host test with v1
-      - v1/lfs --format /dev/loop0
-      - v1/lfs /dev/loop0 mount
-
-      - ls mount
-      - mkdir mount/littlefs
-      - cp -r $(git ls-tree --name-only HEAD) mount/littlefs
-      - cd mount/littlefs
-      - stat .
-      - ls -flh
-      - make -B test
-
-      # attempt to migrate
-      - cd ../..
-      - fusermount -u mount
-
-      - v2/lfs --migrate /dev/loop0
-      - v2/lfs /dev/loop0 mount
-
-      # run self-host test with v2 right where we left off
-      - ls mount
-      - cd mount/littlefs
-      - stat .
-      - ls -flh
-      - make -B test
-
-  # automatically create releases
-  - stage: deploy
-    env:
-      - NAME=deploy
-    script:
-      - |
-        bash << 'SCRIPT'
-        set -ev
-        # Find version defined in lfs.h
-        LFS_VERSION=$(grep -ox '#define LFS_VERSION .*' lfs.h | cut -d ' ' -f3)
-        LFS_VERSION_MAJOR=$((0xffff & ($LFS_VERSION >> 16)))
-        LFS_VERSION_MINOR=$((0xffff & ($LFS_VERSION >>  0)))
-        # Grab latests patch from repo tags, default to 0, needs finagling
-        # to get past github's pagination api
-        PREV_URL=https://api.github.com/repos/$TRAVIS_REPO_SLUG/git/refs/tags/v$LFS_VERSION_MAJOR.$LFS_VERSION_MINOR.
-        PREV_URL=$(curl -u "$GEKY_BOT_RELEASES" "$PREV_URL" -I \
-            | sed -n '/^Link/{s/.*<\(.*\)>; rel="last"/\1/;p;q0};$q1' \
-            || echo $PREV_URL)
-        LFS_VERSION_PATCH=$(curl -u "$GEKY_BOT_RELEASES" "$PREV_URL" \
-            | jq 'map(.ref | match("\\bv.*\\..*\\.(.*)$";"g")
-                .captures[].string | tonumber) | max + 1' \
-            || echo 0)
-        # We have our new version
-        LFS_VERSION="v$LFS_VERSION_MAJOR.$LFS_VERSION_MINOR.$LFS_VERSION_PATCH"
-        echo "VERSION $LFS_VERSION"
-        # Check that we're the most recent commit
-        CURRENT_COMMIT=$(curl -f -u "$GEKY_BOT_RELEASES" \
-            https://api.github.com/repos/$TRAVIS_REPO_SLUG/commits/master \
-            | jq -re '.sha')
-        [ "$TRAVIS_COMMIT" == "$CURRENT_COMMIT" ] || exit 0
-        # Create major branch
-        git branch v$LFS_VERSION_MAJOR HEAD
-        # Create major prefix branch
-        git config user.name "geky bot"
-        git config user.email "bot@geky.net"
-        git fetch https://github.com/$TRAVIS_REPO_SLUG.git \
-            --depth=50 v$LFS_VERSION_MAJOR-prefix || true
-        ./scripts/prefix.py lfs$LFS_VERSION_MAJOR
-        git branch v$LFS_VERSION_MAJOR-prefix $( \
-            git commit-tree $(git write-tree) \
-                $(git rev-parse --verify -q FETCH_HEAD | sed -e 's/^/-p /') \
-                -p HEAD \
-                -m "Generated v$LFS_VERSION_MAJOR prefixes")
-        git reset --hard
-        # Update major version branches (vN and vN-prefix)
-        git push --atomic https://$GEKY_BOT_RELEASES@github.com/$TRAVIS_REPO_SLUG.git \
-            v$LFS_VERSION_MAJOR \
-            v$LFS_VERSION_MAJOR-prefix
-        # Build release notes
-        PREV=$(git tag --sort=-v:refname -l "v*" | head -1)
-        if [ ! -z "$PREV" ]
-        then
-            echo "PREV $PREV"
-            CHANGES=$(git log --oneline $PREV.. --grep='^Merge' --invert-grep)
-            printf "CHANGES\n%s\n\n" "$CHANGES"
-        fi
-        case ${GEKY_BOT_DRAFT:-minor} in
-            true)  DRAFT=true ;;
-            minor) DRAFT=$(jq -R 'endswith(".0")' <<< "$LFS_VERSION") ;;
-            false) DRAFT=false ;;
-        esac
-        # Create the release and patch version tag (vN.N.N)
-        curl -f -u "$GEKY_BOT_RELEASES" -X POST \
-            https://api.github.com/repos/$TRAVIS_REPO_SLUG/releases \
-            -d "{
-                \"tag_name\": \"$LFS_VERSION\",
-                \"name\": \"${LFS_VERSION%.0}\",
-                \"target_commitish\": \"$TRAVIS_COMMIT\",
-                \"draft\": $DRAFT,
-                \"body\": $(jq -sR '.' <<< "$CHANGES")
-            }" #"
-        SCRIPT
-
-# manage statuses
-before_install:
-  - |
-    # don't clobber other (not us) failures
-    if ! curl https://api.github.com/repos/$TRAVIS_REPO_SLUG/status/${TRAVIS_PULL_REQUEST_SHA:-$TRAVIS_COMMIT} \
-        | jq -e ".statuses[] | select(
-            .context == \"${TRAVIS_BUILD_STAGE_NAME,,}/$NAME\" and
-            .state == \"failure\" and
-            (.target_url | endswith(\"$TRAVIS_JOB_NUMBER\") | not))"
-    then
-        curl -u "$GEKY_BOT_STATUSES" -X POST \
-            https://api.github.com/repos/$TRAVIS_REPO_SLUG/statuses/${TRAVIS_PULL_REQUEST_SHA:-$TRAVIS_COMMIT} \
-            -d "{
-                \"context\": \"${TRAVIS_BUILD_STAGE_NAME,,}/$NAME\",
-                \"state\": \"pending\",
-                \"description\": \"${STATUS:-In progress}\",
-                \"target_url\": \"$TRAVIS_JOB_WEB_URL#$TRAVIS_JOB_NUMBER\"
-            }"
-    fi
-
-after_failure:
-  - |
-    # don't clobber other (not us) failures
-    if ! curl https://api.github.com/repos/$TRAVIS_REPO_SLUG/status/${TRAVIS_PULL_REQUEST_SHA:-$TRAVIS_COMMIT} \
-        | jq -e ".statuses[] | select(
-            .context == \"${TRAVIS_BUILD_STAGE_NAME,,}/$NAME\" and
-            .state == \"failure\" and
-            (.target_url | endswith(\"$TRAVIS_JOB_NUMBER\") | not))"
-    then
-        curl -u "$GEKY_BOT_STATUSES" -X POST \
-            https://api.github.com/repos/$TRAVIS_REPO_SLUG/statuses/${TRAVIS_PULL_REQUEST_SHA:-$TRAVIS_COMMIT} \
-            -d "{
-                \"context\": \"${TRAVIS_BUILD_STAGE_NAME,,}/$NAME\",
-                \"state\": \"failure\",
-                \"description\": \"${STATUS:-Failed}\",
-                \"target_url\": \"$TRAVIS_JOB_WEB_URL#$TRAVIS_JOB_NUMBER\"
-            }"
-    fi
-
-after_success:
-  - |
-    # don't clobber other (not us) failures
-    # only update if we were last job to mark in progress,
-    # this isn't perfect but is probably good enough
-    if ! curl https://api.github.com/repos/$TRAVIS_REPO_SLUG/status/${TRAVIS_PULL_REQUEST_SHA:-$TRAVIS_COMMIT} \
-        | jq -e ".statuses[] | select(
-            .context == \"${TRAVIS_BUILD_STAGE_NAME,,}/$NAME\" and
-            (.state == \"failure\" or .state == \"pending\") and
-            (.target_url | endswith(\"$TRAVIS_JOB_NUMBER\") | not))"
-    then
-        curl -u "$GEKY_BOT_STATUSES" -X POST \
-            https://api.github.com/repos/$TRAVIS_REPO_SLUG/statuses/${TRAVIS_PULL_REQUEST_SHA:-$TRAVIS_COMMIT} \
-            -d "{
-                \"context\": \"${TRAVIS_BUILD_STAGE_NAME,,}/$NAME\",
-                \"state\": \"success\",
-                \"description\": \"${STATUS:-Passed}\",
-                \"target_url\": \"$TRAVIS_JOB_WEB_URL#$TRAVIS_JOB_NUMBER\"
-            }"
-    fi

Makefile

@@ -1,69 +1,114 @@
-TARGET = lfs.a
-ifneq ($(wildcard test.c main.c),)
-override TARGET = lfs
+ifdef BUILDDIR
+# make sure BUILDDIR ends with a slash
+override BUILDDIR := $(BUILDDIR)/
+# bit of a hack, but we want to make sure BUILDDIR directory structure
+# is correct before any commands
+$(if $(findstring n,$(MAKEFLAGS)),, $(shell mkdir -p \
+	$(BUILDDIR) \
+	$(BUILDDIR)bd \
+	$(BUILDDIR)tests))
 endif
 
+# overridable target/src/tools/flags/etc
+ifneq ($(wildcard test.c main.c),)
+TARGET ?= $(BUILDDIR)lfs2
+else
+TARGET ?= $(BUILDDIR)lfs2.a
+endif
+
+
 CC ?= gcc
 AR ?= ar
 SIZE ?= size
+CTAGS ?= ctags
+NM ?= nm
+LCOV ?= lcov
 
-SRC += $(wildcard *.c bd/*.c)
-OBJ := $(SRC:.c=.o)
-DEP := $(SRC:.c=.d)
-ASM := $(SRC:.c=.s)
+SRC ?= $(wildcard *.c)
+OBJ := $(SRC:%.c=$(BUILDDIR)%.o)
+DEP := $(SRC:%.c=$(BUILDDIR)%.d)
+ASM := $(SRC:%.c=$(BUILDDIR)%.s)
 
 ifdef DEBUG
 override CFLAGS += -O0 -g3
 else
 override CFLAGS += -Os
 endif
-ifdef WORD
-override CFLAGS += -m$(WORD)
-endif
 ifdef TRACE
-override CFLAGS += -DLFS_YES_TRACE
+override CFLAGS += -DLFS2_YES_TRACE
 endif
 override CFLAGS += -I.
 override CFLAGS += -std=c99 -Wall -pedantic
 override CFLAGS += -Wextra -Wshadow -Wjump-misses-init -Wundef
-# Remove missing-field-initializers because of GCC bug
-override CFLAGS += -Wno-missing-field-initializers
 
 ifdef VERBOSE
-override TFLAGS += -v
+override TESTFLAGS += -v
+override CODEFLAGS += -v
+override COVERAGEFLAGS += -v
+endif
+ifdef EXEC
+override TESTFLAGS += --exec="$(EXEC)"
+endif
+ifdef BUILDDIR
+override TESTFLAGS += --build-dir="$(BUILDDIR:/=)"
+override CODEFLAGS += --build-dir="$(BUILDDIR:/=)"
+endif
+ifneq ($(NM),nm)
+override CODEFLAGS += --nm-tool="$(NM)"
 endif
 
 
-all: $(TARGET)
+# commands
+.PHONY: all build
+all build: $(TARGET)
 
+.PHONY: asm
 asm: $(ASM)
 
+.PHONY: size
 size: $(OBJ)
 	$(SIZE) -t $^
 
+.PHONY: tags
+tags:
+	$(CTAGS) --totals --c-types=+p $(shell find -H -name '*.h') $(SRC)
+
+.PHONY: code
+code: $(OBJ)
+	./scripts/code.py $^ $(CODEFLAGS)
+
+.PHONY: test
 test:
-	./scripts/test.py $(TFLAGS)
+	./scripts/test.py $(TESTFLAGS)
 .SECONDEXPANSION:
 test%: tests/test$$(firstword $$(subst \#, ,%)).toml
-	./scripts/test.py $@ $(TFLAGS)
+	./scripts/test.py $@ $(TESTFLAGS)
 
+.PHONY: coverage
+coverage:
+	./scripts/coverage.py $(BUILDDIR)tests/*.toml.info $(COVERAGEFLAGS)
+
+# rules
 -include $(DEP)
+.SUFFIXES:
 
-lfs: $(OBJ)
+$(BUILDDIR)lfs2: $(OBJ)
 	$(CC) $(CFLAGS) $^ $(LFLAGS) -o $@
 
-%.a: $(OBJ)
+$(BUILDDIR)%.a: $(OBJ)
 	$(AR) rcs $@ $^
 
-%.o: %.c
+$(BUILDDIR)%.o: %.c
 	$(CC) -c -MMD $(CFLAGS) $< -o $@
 
-%.s: %.c
+$(BUILDDIR)%.s: %.c
 	$(CC) -S $(CFLAGS) $< -o $@
 
+# clean everything
+.PHONY: clean
 clean:
 	rm -f $(TARGET)
 	rm -f $(OBJ)
 	rm -f $(DEP)
 	rm -f $(ASM)
-	rm -f tests/*.toml.*
+	rm -f $(BUILDDIR)tests/*.toml.*

README.md

@@ -32,14 +32,14 @@ main runs. The program can be interrupted at any time without losing track
 of how many times it has been booted and without corrupting the filesystem:
 
 ``` c
-#include "lfs.h"
+#include "lfs2.h"
 
 // variables used by the filesystem
-lfs_t lfs;
-lfs_file_t file;
+lfs2_t lfs2;
+lfs2_file_t file;
 
 // configuration of the filesystem is provided by this struct
-const struct lfs_config cfg = {
+const struct lfs2_config cfg = {
     // block device operations
     .read  = user_provided_block_device_read,
     .prog  = user_provided_block_device_prog,
@@ -59,30 +59,30 @@ const struct lfs_config cfg = {
 // entry point
 int main(void) {
     // mount the filesystem
-    int err = lfs_mount(&lfs, &cfg);
+    int err = lfs2_mount(&lfs2, &cfg);
 
     // reformat if we can't mount the filesystem
     // this should only happen on the first boot
     if (err) {
-        lfs_format(&lfs, &cfg);
-        lfs_mount(&lfs, &cfg);
+        lfs2_format(&lfs2, &cfg);
+        lfs2_mount(&lfs2, &cfg);
     }
 
     // read current count
     uint32_t boot_count = 0;
-    lfs_file_open(&lfs, &file, "boot_count", LFS_O_RDWR | LFS_O_CREAT);
-    lfs_file_read(&lfs, &file, &boot_count, sizeof(boot_count));
+    lfs2_file_open(&lfs2, &file, "boot_count", LFS2_O_RDWR | LFS2_O_CREAT);
+    lfs2_file_read(&lfs2, &file, &boot_count, sizeof(boot_count));
 
     // update boot count
     boot_count += 1;
-    lfs_file_rewind(&lfs, &file);
-    lfs_file_write(&lfs, &file, &boot_count, sizeof(boot_count));
+    lfs2_file_rewind(&lfs2, &file);
+    lfs2_file_write(&lfs2, &file, &boot_count, sizeof(boot_count));
 
     // remember the storage is not updated until the file is closed successfully
-    lfs_file_close(&lfs, &file);
+    lfs2_file_close(&lfs2, &file);
 
     // release any resources we were using
-    lfs_unmount(&lfs);
+    lfs2_unmount(&lfs2);
 
     // print the boot count
     printf("boot_count: %d\n", boot_count);
@@ -92,7 +92,7 @@ int main(void) {
 ## Usage
 
 Detailed documentation (or at least as much detail as is currently available)
-can be found in the comments in [lfs.h](lfs.h).
+can be found in the comments in [lfs2.h](lfs2.h).
 
 littlefs takes in a configuration structure that defines how the filesystem
 operates. The configuration struct provides the filesystem with the block
@@ -100,9 +100,9 @@ device operations and dimensions, tweakable parameters that tradeoff memory
 usage for performance, and optional static buffers if the user wants to avoid
 dynamic memory.
 
-The state of the littlefs is stored in the `lfs_t` type which is left up
+The state of the littlefs is stored in the `lfs2_t` type which is left up
 to the user to allocate, allowing multiple filesystems to be in use
-simultaneously. With the `lfs_t` and configuration struct, a user can
+simultaneously. With the `lfs2_t` and configuration struct, a user can
 format a block device or mount the filesystem.
 
 Once mounted, the littlefs provides a full set of POSIX-like file and
@@ -115,12 +115,15 @@ the filesystem until sync or close is called on the file.
 
 ## Other notes
 
+Littlefs is written in C, and specifically should compile with any compiler
+that conforms to the `C99` standard.
+
 All littlefs calls have the potential to return a negative error code. The
-errors can be either one of those found in the `enum lfs_error` in
-[lfs.h](lfs.h), or an error returned by the user's block device operations.
+errors can be either one of those found in the `enum lfs2_error` in
+[lfs2.h](lfs2.h), or an error returned by the user's block device operations.
 
 In the configuration struct, the `prog` and `erase` function provided by the
-user may return a `LFS_ERR_CORRUPT` error if the implementation already can
+user may return a `LFS2_ERR_CORRUPT` error if the implementation already can
 detect corrupt blocks. However, the wear leveling does not depend on the return
 code of these functions, instead all data is read back and checked for
 integrity.
@@ -189,7 +192,7 @@ More details on how littlefs works can be found in [DESIGN.md](DESIGN.md) and
 ## Testing
 
 The littlefs comes with a test suite designed to run on a PC using the
-[emulated block device](emubd/lfs_emubd.h) found in the emubd directory.
+[emulated block device](bd/lfs2_testbd.h) found in the `bd` directory.
 The tests assume a Linux environment and can be started with make:
 
 ``` bash
@@ -218,6 +221,11 @@ License Identifiers that are here available: http://spdx.org/licenses/
 - [littlefs-js] - A javascript wrapper for littlefs. I'm not sure why you would
   want this, but it is handy for demos.  You can see it in action
   [here][littlefs-js-demo].
+  
+- [littlefs-python] - A Python wrapper for littlefs. The project allows you
+  to create images of the filesystem on your PC. Check if littlefs will fit
+  your needs, create images for a later download to the target memory or
+  inspect the content of a binary image of the target memory.
 
 - [mklfs] - A command line tool built by the [Lua RTOS] guys for making
   littlefs images from a host PC. Supports Windows, Mac OS, and Linux.
@@ -247,3 +255,4 @@ License Identifiers that are here available: http://spdx.org/licenses/
 [LittleFileSystem]: https://os.mbed.com/docs/mbed-os/v5.12/apis/littlefilesystem.html
 [SPIFFS]: https://github.com/pellepl/spiffs
 [Dhara]: https://github.com/dlbeer/dhara
+[littlefs-python]: https://pypi.org/project/littlefs-python/

SPEC.md

@@ -233,19 +233,19 @@ Metadata tag fields:
    into a 3-bit abstract type and an 8-bit chunk field. Note that the value
    `0x000` is invalid and not assigned a type.
 
-3. **Type1 (3-bits)** - Abstract type of the tag. Groups the tags into
-   8 categories that facilitate bitmasked lookups.
+    1. **Type1 (3-bits)** - Abstract type of the tag. Groups the tags into
+       8 categories that facilitate bitmasked lookups.
 
-4. **Chunk (8-bits)** - Chunk field used for various purposes by the different
-   abstract types.  type1+chunk+id form a unique identifier for each tag in the
-   metadata block.
+    2. **Chunk (8-bits)** - Chunk field used for various purposes by the different
+       abstract types.  type1+chunk+id form a unique identifier for each tag in the
+       metadata block.
 
-5. **Id (10-bits)** - File id associated with the tag. Each file in a metadata
+3. **Id (10-bits)** - File id associated with the tag. Each file in a metadata
    block gets a unique id which is used to associate tags with that file. The
    special value `0x3ff` is used for any tags that are not associated with a
    file, such as directory and global metadata.
 
-6. **Length (10-bits)** - Length of the data in bytes. The special value
+4. **Length (10-bits)** - Length of the data in bytes. The special value
    `0x3ff` indicates that this tag has been deleted.
 
 ## Metadata types
@@ -253,7 +253,7 @@ Metadata tag fields:
 What follows is an exhaustive list of metadata in littlefs.
 
 ---
-#### `0x401` LFS_TYPE_CREATE
+#### `0x401` LFS2_TYPE_CREATE
 
 Creates a new file with this id. Note that files in a metadata block
 don't necessarily need a create tag. All a create does is move over any
@@ -264,14 +264,14 @@ The create and delete tags allow littlefs to keep files in a directory
 ordered alphabetically by filename.
 
 ---
-#### `0x4ff` LFS_TYPE_DELETE
+#### `0x4ff` LFS2_TYPE_DELETE
 
 Deletes the file with this id. An inverse to create, this tag moves over
 any files neighboring this id similar to a deletion from an imaginary
 array of files.
 
 ---
-#### `0x0xx` LFS_TYPE_NAME
+#### `0x0xx` LFS2_TYPE_NAME
 
 Associates the id with a file name and file type.
 
@@ -289,8 +289,8 @@ Layout of the name tag:
 ```
         tag                          data
 [--      32      --][---        variable length        ---]
-[1| 3| 8 | 10 | 10 ][---            (size)             ---]
- ^  ^  ^    ^    ^- size               ^- file name
+[1| 3| 8 | 10 | 10 ][---          (size * 8)           ---]
+ ^  ^  ^    ^    ^- size                   ^- file name
  |  |  |    '------ id
  |  |  '----------- file type
  |  '-------------- type1 (0x0)
@@ -304,14 +304,14 @@ Name fields:
 2. **file name** - File name stored as an ASCII string.
 
 ---
-#### `0x001` LFS_TYPE_REG
+#### `0x001` LFS2_TYPE_REG
 
 Initializes the id + name as a regular file.
 
 How each file is stored depends on its struct tag, which is described below.
 
 ---
-#### `0x002` LFS_TYPE_DIR
+#### `0x002` LFS2_TYPE_DIR
 
 Initializes the id + name as a directory.
 
@@ -320,7 +320,7 @@ each pair containing any number of files in alphabetical order. A pointer to
 the directory is stored in the struct tag, which is described below.
 
 ---
-#### `0x0ff` LFS_TYPE_SUPERBLOCK
+#### `0x0ff` LFS2_TYPE_SUPERBLOCK
 
 Initializes the id as a superblock entry.
 
@@ -405,7 +405,7 @@ as be the first entry written to the block. This means that the superblock
 entry can be read from a device using offsets alone.
 
 ---
-#### `0x2xx` LFS_TYPE_STRUCT
+#### `0x2xx` LFS2_TYPE_STRUCT
 
 Associates the id with an on-disk data structure.
 
@@ -416,7 +416,7 @@ Any type of struct supersedes all other structs associated with the id. For
 example, appending a ctz-struct replaces an inline-struct on the same file.
 
 ---
-#### `0x200` LFS_TYPE_DIRSTRUCT
+#### `0x200` LFS2_TYPE_DIRSTRUCT
 
 Gives the id a directory data structure.
 
@@ -458,7 +458,7 @@ Dir-struct fields:
    in the directory.
 
 ---
-#### `0x201` LFS_TYPE_INLINESTRUCT
+#### `0x201` LFS2_TYPE_INLINESTRUCT
 
 Gives the id an inline data structure.
 
@@ -470,8 +470,8 @@ Layout of the inline-struct tag:
 ```
         tag                          data
 [--      32      --][---        variable length        ---]
-[1|- 11 -| 10 | 10 ][---            (size)             ---]
- ^    ^     ^    ^- size               ^- inline data
+[1|- 11 -| 10 | 10 ][---           (size * 8)          ---]
+ ^    ^     ^    ^- size                    ^- inline data
  |    |     '------ id
  |    '------------ type (0x201)
  '----------------- valid bit
@@ -482,7 +482,7 @@ Inline-struct fields:
 1. **Inline data** - File data stored directly in the metadata-pair.
 
 ---
-#### `0x202` LFS_TYPE_CTZSTRUCT
+#### `0x202` LFS2_TYPE_CTZSTRUCT
 
 Gives the id a CTZ skip-list data structure.
 
@@ -537,7 +537,7 @@ CTZ-struct fields:
 2. **File size (32-bits)** - Size of the file in bytes.
 
 ---
-#### `0x3xx` LFS_TYPE_USERATTR
+#### `0x3xx` LFS2_TYPE_USERATTR
 
 Attaches a user attribute to an id.
 
@@ -556,8 +556,8 @@ Layout of the user-attr tag:
 ```
         tag                          data
 [--      32      --][---        variable length        ---]
-[1| 3| 8 | 10 | 10 ][---            (size)             ---]
- ^  ^  ^    ^    ^- size               ^- attr data
+[1| 3| 8 | 10 | 10 ][---           (size * 8)          ---]
+ ^  ^  ^    ^    ^- size                    ^- attr data
  |  |  |    '------ id
  |  |  '----------- attr type
  |  '-------------- type1 (0x3)
@@ -571,7 +571,7 @@ User-attr fields:
 2. **Attr data** - The data associated with the user attribute.
 
 ---
-#### `0x6xx` LFS_TYPE_TAIL
+#### `0x6xx` LFS2_TYPE_TAIL
 
 Provides the tail pointer for the metadata pair itself.
 
@@ -637,7 +637,7 @@ Tail fields:
 2. **Metadata pair (8-bytes)** - Pointer to the next metadata-pair.
 
 ---
-#### `0x600` LFS_TYPE_SOFTTAIL
+#### `0x600` LFS2_TYPE_SOFTTAIL
 
 Provides a tail pointer that points to the next metadata pair in the
 filesystem.
@@ -646,7 +646,7 @@ In this case, the next metadata pair is not a part of our current directory
 and should only be followed when traversing the entire filesystem.
 
 ---
-#### `0x601` LFS_TYPE_HARDTAIL
+#### `0x601` LFS2_TYPE_HARDTAIL
 
 Provides a tail pointer that points to the next metadata pair in the
 directory.
@@ -657,7 +657,7 @@ metadata pair should only contain filenames greater than any filename in the
 current pair.
 
 ---
-#### `0x7xx` LFS_TYPE_GSTATE
+#### `0x7xx` LFS2_TYPE_GSTATE
 
 Provides delta bits for global state entries.
 
@@ -687,7 +687,7 @@ is stored in the chunk field. Currently, the only global state is move state,
 which is outlined below.
 
 ---
-#### `0x7ff` LFS_TYPE_MOVESTATE
+#### `0x7ff` LFS2_TYPE_MOVESTATE
 
 Provides delta bits for the global move state.
 
@@ -740,7 +740,7 @@ Move state fields:
    the move.
 
 ---
-#### `0x5xx` LFS_TYPE_CRC
+#### `0x5xx` LFS2_TYPE_CRC
 
 Last but not least, the CRC tag marks the end of a commit and provides a
 checksum for any commits to the metadata block.
@@ -764,9 +764,9 @@ Layout of the CRC tag:
 ```
         tag                                    data
 [--      32      --][--      32      --|---        variable length        ---]
-[1| 3| 8 | 10 | 10 ][--      32      --|---            (size)             ---]
- ^  ^  ^    ^    ^            ^- crc                      ^- padding
- |  |  |    |    '- size (12)
+[1| 3| 8 | 10 | 10 ][--      32      --|---        (size * 8 - 32)        ---]
+ ^  ^  ^    ^    ^            ^- crc                             ^- padding
+ |  |  |    |    '- size
  |  |  |    '------ id (0x3ff)
  |  |  '----------- valid state
  |  '-------------- type1 (0x5)

bd/lfs2_filebd.c

@@ -4,15 +4,15 @@
  * Copyright (c) 2017, Arm Limited. All rights reserved.
  * SPDX-License-Identifier: BSD-3-Clause
  */
-#include "bd/lfs_filebd.h"
+#include "bd/lfs2_filebd.h"
 
 #include <fcntl.h>
 #include <unistd.h>
 #include <errno.h>
 
-int lfs_filebd_createcfg(const struct lfs_config *cfg, const char *path,
-        const struct lfs_filebd_config *bdcfg) {
-    LFS_TRACE("lfs_filebd_createcfg(%p {.context=%p, "
+int lfs2_filebd_createcfg(const struct lfs2_config *cfg, const char *path,
+        const struct lfs2_filebd_config *bdcfg) {
+    LFS2_FILEBD_TRACE("lfs2_filebd_createcfg(%p {.context=%p, "
                 ".read=%p, .prog=%p, .erase=%p, .sync=%p, "
                 ".read_size=%"PRIu32", .prog_size=%"PRIu32", "
                 ".block_size=%"PRIu32", .block_count=%"PRIu32"}, "
@@ -23,23 +23,23 @@ int lfs_filebd_createcfg(const struct lfs_config *cfg, const char *path,
             (void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
             cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count,
             path, (void*)bdcfg, bdcfg->erase_value);
-    lfs_filebd_t *bd = cfg->context;
+    lfs2_filebd_t *bd = cfg->context;
     bd->cfg = bdcfg;
 
     // open file
     bd->fd = open(path, O_RDWR | O_CREAT, 0666);
     if (bd->fd < 0) {
         int err = -errno;
-        LFS_TRACE("lfs_filebd_createcfg -> %d", err);
+        LFS2_FILEBD_TRACE("lfs2_filebd_createcfg -> %d", err);
         return err;
     }
 
-    LFS_TRACE("lfs_filebd_createcfg -> %d", 0);
+    LFS2_FILEBD_TRACE("lfs2_filebd_createcfg -> %d", 0);
     return 0;
 }
 
-int lfs_filebd_create(const struct lfs_config *cfg, const char *path) {
-    LFS_TRACE("lfs_filebd_create(%p {.context=%p, "
+int lfs2_filebd_create(const struct lfs2_config *cfg, const char *path) {
+    LFS2_FILEBD_TRACE("lfs2_filebd_create(%p {.context=%p, "
                 ".read=%p, .prog=%p, .erase=%p, .sync=%p, "
                 ".read_size=%"PRIu32", .prog_size=%"PRIu32", "
                 ".block_size=%"PRIu32", .block_count=%"PRIu32"}, "
@@ -49,37 +49,38 @@ int lfs_filebd_create(const struct lfs_config *cfg, const char *path) {
             (void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
             cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count,
             path);
-    static const struct lfs_filebd_config defaults = {.erase_value=-1};
-    int err = lfs_filebd_createcfg(cfg, path, &defaults);
-    LFS_TRACE("lfs_filebd_create -> %d", err);
+    static const struct lfs2_filebd_config defaults = {.erase_value=-1};
+    int err = lfs2_filebd_createcfg(cfg, path, &defaults);
+    LFS2_FILEBD_TRACE("lfs2_filebd_create -> %d", err);
     return err;
 }
 
-int lfs_filebd_destroy(const struct lfs_config *cfg) {
-    LFS_TRACE("lfs_filebd_destroy(%p)", (void*)cfg);
-    lfs_filebd_t *bd = cfg->context;
+int lfs2_filebd_destroy(const struct lfs2_config *cfg) {
+    LFS2_FILEBD_TRACE("lfs2_filebd_destroy(%p)", (void*)cfg);
+    lfs2_filebd_t *bd = cfg->context;
     int err = close(bd->fd);
     if (err < 0) {
         err = -errno;
-        LFS_TRACE("lfs_filebd_destroy -> %d", err);
+        LFS2_FILEBD_TRACE("lfs2_filebd_destroy -> %d", err);
         return err;
     }
-    LFS_TRACE("lfs_filebd_destroy -> %d", 0);
+    LFS2_FILEBD_TRACE("lfs2_filebd_destroy -> %d", 0);
     return 0;
 }
 
-int lfs_filebd_read(const struct lfs_config *cfg, lfs_block_t block,
-        lfs_off_t off, void *buffer, lfs_size_t size) {
-    LFS_TRACE("lfs_filebd_read(%p, 0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
+int lfs2_filebd_read(const struct lfs2_config *cfg, lfs2_block_t block,
+        lfs2_off_t off, void *buffer, lfs2_size_t size) {
+    LFS2_FILEBD_TRACE("lfs2_filebd_read(%p, "
+                "0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
             (void*)cfg, block, off, buffer, size);
-    lfs_filebd_t *bd = cfg->context;
+    lfs2_filebd_t *bd = cfg->context;
 
     // check if read is valid
-    LFS_ASSERT(off  % cfg->read_size == 0);
-    LFS_ASSERT(size % cfg->read_size == 0);
-    LFS_ASSERT(block < cfg->block_count);
+    LFS2_ASSERT(off  % cfg->read_size == 0);
+    LFS2_ASSERT(size % cfg->read_size == 0);
+    LFS2_ASSERT(block < cfg->block_count);
 
-    // zero for reproducability (in case file is truncated)
+    // zero for reproducibility (in case file is truncated)
     if (bd->cfg->erase_value != -1) {
         memset(buffer, bd->cfg->erase_value, size);
     }
@@ -89,31 +90,31 @@ int lfs_filebd_read(const struct lfs_config *cfg, lfs_block_t block,
             (off_t)block*cfg->block_size + (off_t)off, SEEK_SET);
     if (res1 < 0) {
         int err = -errno;
-        LFS_TRACE("lfs_filebd_read -> %d", err);
+        LFS2_FILEBD_TRACE("lfs2_filebd_read -> %d", err);
         return err;
     }
 
     ssize_t res2 = read(bd->fd, buffer, size);
     if (res2 < 0) {
         int err = -errno;
-        LFS_TRACE("lfs_filebd_read -> %d", err);
+        LFS2_FILEBD_TRACE("lfs2_filebd_read -> %d", err);
         return err;
     }
 
-    LFS_TRACE("lfs_filebd_read -> %d", 0);
+    LFS2_FILEBD_TRACE("lfs2_filebd_read -> %d", 0);
     return 0;
 }
 
-int lfs_filebd_prog(const struct lfs_config *cfg, lfs_block_t block,
-        lfs_off_t off, const void *buffer, lfs_size_t size) {
-    LFS_TRACE("lfs_filebd_prog(%p, 0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
+int lfs2_filebd_prog(const struct lfs2_config *cfg, lfs2_block_t block,
+        lfs2_off_t off, const void *buffer, lfs2_size_t size) {
+    LFS2_FILEBD_TRACE("lfs2_filebd_prog(%p, 0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
             (void*)cfg, block, off, buffer, size);
-    lfs_filebd_t *bd = cfg->context;
+    lfs2_filebd_t *bd = cfg->context;
 
     // check if write is valid
-    LFS_ASSERT(off  % cfg->prog_size == 0);
-    LFS_ASSERT(size % cfg->prog_size == 0);
-    LFS_ASSERT(block < cfg->block_count);
+    LFS2_ASSERT(off  % cfg->prog_size == 0);
+    LFS2_ASSERT(size % cfg->prog_size == 0);
+    LFS2_ASSERT(block < cfg->block_count);
 
     // check that data was erased? only needed for testing
     if (bd->cfg->erase_value != -1) {
@@ -121,20 +122,20 @@ int lfs_filebd_prog(const struct lfs_config *cfg, lfs_block_t block,
                 (off_t)block*cfg->block_size + (off_t)off, SEEK_SET);
         if (res1 < 0) {
             int err = -errno;
-            LFS_TRACE("lfs_filebd_prog -> %d", err);
+            LFS2_FILEBD_TRACE("lfs2_filebd_prog -> %d", err);
             return err;
         }
 
-        for (lfs_off_t i = 0; i < size; i++) {
+        for (lfs2_off_t i = 0; i < size; i++) {
             uint8_t c;
             ssize_t res2 = read(bd->fd, &c, 1);
             if (res2 < 0) {
                 int err = -errno;
-                LFS_TRACE("lfs_filebd_prog -> %d", err);
+                LFS2_FILEBD_TRACE("lfs2_filebd_prog -> %d", err);
                 return err;
             }
 
-            LFS_ASSERT(c == bd->cfg->erase_value);
+            LFS2_ASSERT(c == bd->cfg->erase_value);
         }
     }
 
@@ -143,62 +144,62 @@ int lfs_filebd_prog(const struct lfs_config *cfg, lfs_block_t block,
             (off_t)block*cfg->block_size + (off_t)off, SEEK_SET);
     if (res1 < 0) {
         int err = -errno;
-        LFS_TRACE("lfs_filebd_prog -> %d", err);
+        LFS2_FILEBD_TRACE("lfs2_filebd_prog -> %d", err);
         return err;
     }
 
     ssize_t res2 = write(bd->fd, buffer, size);
     if (res2 < 0) {
         int err = -errno;
-        LFS_TRACE("lfs_filebd_prog -> %d", err);
+        LFS2_FILEBD_TRACE("lfs2_filebd_prog -> %d", err);
         return err;
     }
 
-    LFS_TRACE("lfs_filebd_prog -> %d", 0);
+    LFS2_FILEBD_TRACE("lfs2_filebd_prog -> %d", 0);
     return 0;
 }
 
-int lfs_filebd_erase(const struct lfs_config *cfg, lfs_block_t block) {
-    LFS_TRACE("lfs_filebd_erase(%p, 0x%"PRIx32")", (void*)cfg, block);
-    lfs_filebd_t *bd = cfg->context;
+int lfs2_filebd_erase(const struct lfs2_config *cfg, lfs2_block_t block) {
+    LFS2_FILEBD_TRACE("lfs2_filebd_erase(%p, 0x%"PRIx32")", (void*)cfg, block);
+    lfs2_filebd_t *bd = cfg->context;
 
     // check if erase is valid
-    LFS_ASSERT(block < cfg->block_count);
+    LFS2_ASSERT(block < cfg->block_count);
 
     // erase, only needed for testing
     if (bd->cfg->erase_value != -1) {
         off_t res1 = lseek(bd->fd, (off_t)block*cfg->block_size, SEEK_SET);
         if (res1 < 0) {
             int err = -errno;
-            LFS_TRACE("lfs_filebd_erase -> %d", err);
+            LFS2_FILEBD_TRACE("lfs2_filebd_erase -> %d", err);
             return err;
         }
 
-        for (lfs_off_t i = 0; i < cfg->block_size; i++) {
+        for (lfs2_off_t i = 0; i < cfg->block_size; i++) {
             ssize_t res2 = write(bd->fd, &(uint8_t){bd->cfg->erase_value}, 1);
             if (res2 < 0) {
                 int err = -errno;
-                LFS_TRACE("lfs_filebd_erase -> %d", err);
+                LFS2_FILEBD_TRACE("lfs2_filebd_erase -> %d", err);
                 return err;
             }
         }
     }
 
-    LFS_TRACE("lfs_filebd_erase -> %d", 0);
+    LFS2_FILEBD_TRACE("lfs2_filebd_erase -> %d", 0);
     return 0;
 }
 
-int lfs_filebd_sync(const struct lfs_config *cfg) {
-    LFS_TRACE("lfs_filebd_sync(%p)", (void*)cfg);
+int lfs2_filebd_sync(const struct lfs2_config *cfg) {
+    LFS2_FILEBD_TRACE("lfs2_filebd_sync(%p)", (void*)cfg);
     // file sync
-    lfs_filebd_t *bd = cfg->context;
+    lfs2_filebd_t *bd = cfg->context;
     int err = fsync(bd->fd);
     if (err) {
         err = -errno;
-        LFS_TRACE("lfs_filebd_sync -> %d", 0);
+        LFS2_FILEBD_TRACE("lfs2_filebd_sync -> %d", 0);
         return err;
     }
 
-    LFS_TRACE("lfs_filebd_sync -> %d", 0);
+    LFS2_FILEBD_TRACE("lfs2_filebd_sync -> %d", 0);
     return 0;
 }

bd/lfs2_filebd.h

@@ -0,0 +1,73 @@
+/*
+ * Block device emulated in a file
+ *
+ * Copyright (c) 2017, Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#ifndef LFS2_FILEBD_H
+#define LFS2_FILEBD_H
+
+#include "lfs2.h"
+#include "lfs2_util.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
+// Block device specific tracing
+#ifdef LFS2_FILEBD_YES_TRACE
+#define LFS2_FILEBD_TRACE(...) LFS2_TRACE(__VA_ARGS__)
+#else
+#define LFS2_FILEBD_TRACE(...)
+#endif
+
+// filebd config (optional)
+struct lfs2_filebd_config {
+    // 8-bit erase value to use for simulating erases. -1 does not simulate
+    // erases, which can speed up testing by avoiding all the extra block-device
+    // operations to store the erase value.
+    int32_t erase_value;
+};
+
+// filebd state
+typedef struct lfs2_filebd {
+    int fd;
+    const struct lfs2_filebd_config *cfg;
+} lfs2_filebd_t;
+
+
+// Create a file block device using the geometry in lfs2_config
+int lfs2_filebd_create(const struct lfs2_config *cfg, const char *path);
+int lfs2_filebd_createcfg(const struct lfs2_config *cfg, const char *path,
+        const struct lfs2_filebd_config *bdcfg);
+
+// Clean up memory associated with block device
+int lfs2_filebd_destroy(const struct lfs2_config *cfg);
+
+// Read a block
+int lfs2_filebd_read(const struct lfs2_config *cfg, lfs2_block_t block,
+        lfs2_off_t off, void *buffer, lfs2_size_t size);
+
+// Program a block
+//
+// The block must have previously been erased.
+int lfs2_filebd_prog(const struct lfs2_config *cfg, lfs2_block_t block,
+        lfs2_off_t off, const void *buffer, lfs2_size_t size);
+
+// Erase a block
+//
+// A block must be erased before being programmed. The
+// state of an erased block is undefined.
+int lfs2_filebd_erase(const struct lfs2_config *cfg, lfs2_block_t block);
+
+// Sync the block device
+int lfs2_filebd_sync(const struct lfs2_config *cfg);
+
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif

bd/lfs2_rambd.c

@@ -0,0 +1,142 @@
+/*
+ * Block device emulated in RAM
+ *
+ * Copyright (c) 2017, Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include "bd/lfs2_rambd.h"
+
+int lfs2_rambd_createcfg(const struct lfs2_config *cfg,
+        const struct lfs2_rambd_config *bdcfg) {
+    LFS2_RAMBD_TRACE("lfs2_rambd_createcfg(%p {.context=%p, "
+                ".read=%p, .prog=%p, .erase=%p, .sync=%p, "
+                ".read_size=%"PRIu32", .prog_size=%"PRIu32", "
+                ".block_size=%"PRIu32", .block_count=%"PRIu32"}, "
+                "%p {.erase_value=%"PRId32", .buffer=%p})",
+            (void*)cfg, cfg->context,
+            (void*)(uintptr_t)cfg->read, (void*)(uintptr_t)cfg->prog,
+            (void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
+            cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count,
+            (void*)bdcfg, bdcfg->erase_value, bdcfg->buffer);
+    lfs2_rambd_t *bd = cfg->context;
+    bd->cfg = bdcfg;
+
+    // allocate buffer?
+    if (bd->cfg->buffer) {
+        bd->buffer = bd->cfg->buffer;
+    } else {
+        bd->buffer = lfs2_malloc(cfg->block_size * cfg->block_count);
+        if (!bd->buffer) {
+            LFS2_RAMBD_TRACE("lfs2_rambd_createcfg -> %d", LFS2_ERR_NOMEM);
+            return LFS2_ERR_NOMEM;
+        }
+    }
+
+    // zero for reproducibility?
+    if (bd->cfg->erase_value != -1) {
+        memset(bd->buffer, bd->cfg->erase_value,
+                cfg->block_size * cfg->block_count);
+    } else {
+        memset(bd->buffer, 0, cfg->block_size * cfg->block_count);
+    }
+
+    LFS2_RAMBD_TRACE("lfs2_rambd_createcfg -> %d", 0);
+    return 0;
+}
+
+int lfs2_rambd_create(const struct lfs2_config *cfg) {
+    LFS2_RAMBD_TRACE("lfs2_rambd_create(%p {.context=%p, "
+                ".read=%p, .prog=%p, .erase=%p, .sync=%p, "
+                ".read_size=%"PRIu32", .prog_size=%"PRIu32", "
+                ".block_size=%"PRIu32", .block_count=%"PRIu32"})",
+            (void*)cfg, cfg->context,
+            (void*)(uintptr_t)cfg->read, (void*)(uintptr_t)cfg->prog,
+            (void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
+            cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count);
+    static const struct lfs2_rambd_config defaults = {.erase_value=-1};
+    int err = lfs2_rambd_createcfg(cfg, &defaults);
+    LFS2_RAMBD_TRACE("lfs2_rambd_create -> %d", err);
+    return err;
+}
+
+int lfs2_rambd_destroy(const struct lfs2_config *cfg) {
+    LFS2_RAMBD_TRACE("lfs2_rambd_destroy(%p)", (void*)cfg);
+    // clean up memory
+    lfs2_rambd_t *bd = cfg->context;
+    if (!bd->cfg->buffer) {
+        lfs2_free(bd->buffer);
+    }
+    LFS2_RAMBD_TRACE("lfs2_rambd_destroy -> %d", 0);
+    return 0;
+}
+
+int lfs2_rambd_read(const struct lfs2_config *cfg, lfs2_block_t block,
+        lfs2_off_t off, void *buffer, lfs2_size_t size) {
+    LFS2_RAMBD_TRACE("lfs2_rambd_read(%p, "
+                "0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
+            (void*)cfg, block, off, buffer, size);
+    lfs2_rambd_t *bd = cfg->context;
+
+    // check if read is valid
+    LFS2_ASSERT(off  % cfg->read_size == 0);
+    LFS2_ASSERT(size % cfg->read_size == 0);
+    LFS2_ASSERT(block < cfg->block_count);
+
+    // read data
+    memcpy(buffer, &bd->buffer[block*cfg->block_size + off], size);
+
+    LFS2_RAMBD_TRACE("lfs2_rambd_read -> %d", 0);
+    return 0;
+}
+
+int lfs2_rambd_prog(const struct lfs2_config *cfg, lfs2_block_t block,
+        lfs2_off_t off, const void *buffer, lfs2_size_t size) {
+    LFS2_RAMBD_TRACE("lfs2_rambd_prog(%p, "
+                "0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
+            (void*)cfg, block, off, buffer, size);
+    lfs2_rambd_t *bd = cfg->context;
+
+    // check if write is valid
+    LFS2_ASSERT(off  % cfg->prog_size == 0);
+    LFS2_ASSERT(size % cfg->prog_size == 0);
+    LFS2_ASSERT(block < cfg->block_count);
+
+    // check that data was erased? only needed for testing
+    if (bd->cfg->erase_value != -1) {
+        for (lfs2_off_t i = 0; i < size; i++) {
+            LFS2_ASSERT(bd->buffer[block*cfg->block_size + off + i] ==
+                    bd->cfg->erase_value);
+        }
+    }
+
+    // program data
+    memcpy(&bd->buffer[block*cfg->block_size + off], buffer, size);
+
+    LFS2_RAMBD_TRACE("lfs2_rambd_prog -> %d", 0);
+    return 0;
+}
+
+int lfs2_rambd_erase(const struct lfs2_config *cfg, lfs2_block_t block) {
+    LFS2_RAMBD_TRACE("lfs2_rambd_erase(%p, 0x%"PRIx32")", (void*)cfg, block);
+    lfs2_rambd_t *bd = cfg->context;
+
+    // check if erase is valid
+    LFS2_ASSERT(block < cfg->block_count);
+
+    // erase, only needed for testing
+    if (bd->cfg->erase_value != -1) {
+        memset(&bd->buffer[block*cfg->block_size],
+                bd->cfg->erase_value, cfg->block_size);
+    }
+
+    LFS2_RAMBD_TRACE("lfs2_rambd_erase -> %d", 0);
+    return 0;
+}
+
+int lfs2_rambd_sync(const struct lfs2_config *cfg) {
+    LFS2_RAMBD_TRACE("lfs2_rambd_sync(%p)", (void*)cfg);
+    // sync does nothing because we aren't backed by anything real
+    (void)cfg;
+    LFS2_RAMBD_TRACE("lfs2_rambd_sync -> %d", 0);
+    return 0;
+}

bd/lfs2_rambd.h

@@ -0,0 +1,75 @@
+/*
+ * Block device emulated in RAM
+ *
+ * Copyright (c) 2017, Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#ifndef LFS2_RAMBD_H
+#define LFS2_RAMBD_H
+
+#include "lfs2.h"
+#include "lfs2_util.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
+// Block device specific tracing
+#ifdef LFS2_RAMBD_YES_TRACE
+#define LFS2_RAMBD_TRACE(...) LFS2_TRACE(__VA_ARGS__)
+#else
+#define LFS2_RAMBD_TRACE(...)
+#endif
+
+// rambd config (optional)
+struct lfs2_rambd_config {
+    // 8-bit erase value to simulate erasing with. -1 indicates no erase
+    // occurs, which is still a valid block device
+    int32_t erase_value;
+
+    // Optional statically allocated buffer for the block device.
+    void *buffer;
+};
+
+// rambd state
+typedef struct lfs2_rambd {
+    uint8_t *buffer;
+    const struct lfs2_rambd_config *cfg;
+} lfs2_rambd_t;
+
+
+// Create a RAM block device using the geometry in lfs2_config
+int lfs2_rambd_create(const struct lfs2_config *cfg);
+int lfs2_rambd_createcfg(const struct lfs2_config *cfg,
+        const struct lfs2_rambd_config *bdcfg);
+
+// Clean up memory associated with block device
+int lfs2_rambd_destroy(const struct lfs2_config *cfg);
+
+// Read a block
+int lfs2_rambd_read(const struct lfs2_config *cfg, lfs2_block_t block,
+        lfs2_off_t off, void *buffer, lfs2_size_t size);
+
+// Program a block
+//
+// The block must have previously been erased.
+int lfs2_rambd_prog(const struct lfs2_config *cfg, lfs2_block_t block,
+        lfs2_off_t off, const void *buffer, lfs2_size_t size);
+
+// Erase a block
+//
+// A block must be erased before being programmed. The
+// state of an erased block is undefined.
+int lfs2_rambd_erase(const struct lfs2_config *cfg, lfs2_block_t block);
+
+// Sync the block device
+int lfs2_rambd_sync(const struct lfs2_config *cfg);
+
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif

bd/lfs2_testbd.c

@@ -0,0 +1,302 @@
+/*
+ * Testing block device, wraps filebd and rambd while providing a bunch
+ * of hooks for testing littlefs in various conditions.
+ *
+ * Copyright (c) 2017, Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include "bd/lfs2_testbd.h"
+
+#include <stdlib.h>
+
+
+int lfs2_testbd_createcfg(const struct lfs2_config *cfg, const char *path,
+        const struct lfs2_testbd_config *bdcfg) {
+    LFS2_TESTBD_TRACE("lfs2_testbd_createcfg(%p {.context=%p, "
+                ".read=%p, .prog=%p, .erase=%p, .sync=%p, "
+                ".read_size=%"PRIu32", .prog_size=%"PRIu32", "
+                ".block_size=%"PRIu32", .block_count=%"PRIu32"}, "
+                "\"%s\", "
+                "%p {.erase_value=%"PRId32", .erase_cycles=%"PRIu32", "
+                ".badblock_behavior=%"PRIu8", .power_cycles=%"PRIu32", "
+                ".buffer=%p, .wear_buffer=%p})",
+            (void*)cfg, cfg->context,
+            (void*)(uintptr_t)cfg->read, (void*)(uintptr_t)cfg->prog,
+            (void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
+            cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count,
+            path, (void*)bdcfg, bdcfg->erase_value, bdcfg->erase_cycles,
+            bdcfg->badblock_behavior, bdcfg->power_cycles,
+            bdcfg->buffer, bdcfg->wear_buffer);
+    lfs2_testbd_t *bd = cfg->context;
+    bd->cfg = bdcfg;
+
+    // setup testing things
+    bd->persist = path;
+    bd->power_cycles = bd->cfg->power_cycles;
+
+    if (bd->cfg->erase_cycles) {
+        if (bd->cfg->wear_buffer) {
+            bd->wear = bd->cfg->wear_buffer;
+        } else {
+            bd->wear = lfs2_malloc(sizeof(lfs2_testbd_wear_t)*cfg->block_count);
+            if (!bd->wear) {
+                LFS2_TESTBD_TRACE("lfs2_testbd_createcfg -> %d", LFS2_ERR_NOMEM);
+                return LFS2_ERR_NOMEM;
+            }
+        }
+
+        memset(bd->wear, 0, sizeof(lfs2_testbd_wear_t) * cfg->block_count);
+    }
+
+    // create underlying block device
+    if (bd->persist) {
+        bd->u.file.cfg = (struct lfs2_filebd_config){
+            .erase_value = bd->cfg->erase_value,
+        };
+        int err = lfs2_filebd_createcfg(cfg, path, &bd->u.file.cfg);
+        LFS2_TESTBD_TRACE("lfs2_testbd_createcfg -> %d", err);
+        return err;
+    } else {
+        bd->u.ram.cfg = (struct lfs2_rambd_config){
+            .erase_value = bd->cfg->erase_value,
+            .buffer = bd->cfg->buffer,
+        };
+        int err = lfs2_rambd_createcfg(cfg, &bd->u.ram.cfg);
+        LFS2_TESTBD_TRACE("lfs2_testbd_createcfg -> %d", err);
+        return err;
+    }
+}
+
+int lfs2_testbd_create(const struct lfs2_config *cfg, const char *path) {
+    LFS2_TESTBD_TRACE("lfs2_testbd_create(%p {.context=%p, "
+                ".read=%p, .prog=%p, .erase=%p, .sync=%p, "
+                ".read_size=%"PRIu32", .prog_size=%"PRIu32", "
+                ".block_size=%"PRIu32", .block_count=%"PRIu32"}, "
+                "\"%s\")",
+            (void*)cfg, cfg->context,
+            (void*)(uintptr_t)cfg->read, (void*)(uintptr_t)cfg->prog,
+            (void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
+            cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count,
+            path);
+    static const struct lfs2_testbd_config defaults = {.erase_value=-1};
+    int err = lfs2_testbd_createcfg(cfg, path, &defaults);
+    LFS2_TESTBD_TRACE("lfs2_testbd_create -> %d", err);
+    return err;
+}
+
+int lfs2_testbd_destroy(const struct lfs2_config *cfg) {
+    LFS2_TESTBD_TRACE("lfs2_testbd_destroy(%p)", (void*)cfg);
+    lfs2_testbd_t *bd = cfg->context;
+    if (bd->cfg->erase_cycles && !bd->cfg->wear_buffer) {
+        lfs2_free(bd->wear);
+    }
+
+    if (bd->persist) {
+        int err = lfs2_filebd_destroy(cfg);
+        LFS2_TESTBD_TRACE("lfs2_testbd_destroy -> %d", err);
+        return err;
+    } else {
+        int err = lfs2_rambd_destroy(cfg);
+        LFS2_TESTBD_TRACE("lfs2_testbd_destroy -> %d", err);
+        return err;
+    }
+}
+
+/// Internal mapping to block devices ///
+static int lfs2_testbd_rawread(const struct lfs2_config *cfg, lfs2_block_t block,
+        lfs2_off_t off, void *buffer, lfs2_size_t size) {
+    lfs2_testbd_t *bd = cfg->context;
+    if (bd->persist) {
+        return lfs2_filebd_read(cfg, block, off, buffer, size);
+    } else {
+        return lfs2_rambd_read(cfg, block, off, buffer, size);
+    }
+}
+
+static int lfs2_testbd_rawprog(const struct lfs2_config *cfg, lfs2_block_t block,
+        lfs2_off_t off, const void *buffer, lfs2_size_t size) {
+    lfs2_testbd_t *bd = cfg->context;
+    if (bd->persist) {
+        return lfs2_filebd_prog(cfg, block, off, buffer, size);
+    } else {
+        return lfs2_rambd_prog(cfg, block, off, buffer, size);
+    }
+}
+
+static int lfs2_testbd_rawerase(const struct lfs2_config *cfg,
+        lfs2_block_t block) {
+    lfs2_testbd_t *bd = cfg->context;
+    if (bd->persist) {
+        return lfs2_filebd_erase(cfg, block);
+    } else {
+        return lfs2_rambd_erase(cfg, block);
+    }
+}
+
+static int lfs2_testbd_rawsync(const struct lfs2_config *cfg) {
+    lfs2_testbd_t *bd = cfg->context;
+    if (bd->persist) {
+        return lfs2_filebd_sync(cfg);
+    } else {
+        return lfs2_rambd_sync(cfg);
+    }
+}
+
+/// block device API ///
+int lfs2_testbd_read(const struct lfs2_config *cfg, lfs2_block_t block,
+        lfs2_off_t off, void *buffer, lfs2_size_t size) {
+    LFS2_TESTBD_TRACE("lfs2_testbd_read(%p, "
+                "0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
+            (void*)cfg, block, off, buffer, size);
+    lfs2_testbd_t *bd = cfg->context;
+
+    // check if read is valid
+    LFS2_ASSERT(off  % cfg->read_size == 0);
+    LFS2_ASSERT(size % cfg->read_size == 0);
+    LFS2_ASSERT(block < cfg->block_count);
+
+    // block bad?
+    if (bd->cfg->erase_cycles && bd->wear[block] >= bd->cfg->erase_cycles &&
+            bd->cfg->badblock_behavior == LFS2_TESTBD_BADBLOCK_READERROR) {
+        LFS2_TESTBD_TRACE("lfs2_testbd_read -> %d", LFS2_ERR_CORRUPT);
+        return LFS2_ERR_CORRUPT;
+    }
+
+    // read
+    int err = lfs2_testbd_rawread(cfg, block, off, buffer, size);
+    LFS2_TESTBD_TRACE("lfs2_testbd_read -> %d", err);
+    return err;
+}
+
+int lfs2_testbd_prog(const struct lfs2_config *cfg, lfs2_block_t block,
+        lfs2_off_t off, const void *buffer, lfs2_size_t size) {
+    LFS2_TESTBD_TRACE("lfs2_testbd_prog(%p, "
+                "0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
+            (void*)cfg, block, off, buffer, size);
+    lfs2_testbd_t *bd = cfg->context;
+
+    // check if write is valid
+    LFS2_ASSERT(off  % cfg->prog_size == 0);
+    LFS2_ASSERT(size % cfg->prog_size == 0);
+    LFS2_ASSERT(block < cfg->block_count);
+
+    // block bad?
+    if (bd->cfg->erase_cycles && bd->wear[block] >= bd->cfg->erase_cycles) {
+        if (bd->cfg->badblock_behavior ==
+                LFS2_TESTBD_BADBLOCK_PROGERROR) {
+            LFS2_TESTBD_TRACE("lfs2_testbd_prog -> %d", LFS2_ERR_CORRUPT);
+            return LFS2_ERR_CORRUPT;
+        } else if (bd->cfg->badblock_behavior ==
+                LFS2_TESTBD_BADBLOCK_PROGNOOP ||
+                bd->cfg->badblock_behavior ==
+                LFS2_TESTBD_BADBLOCK_ERASENOOP) {
+            LFS2_TESTBD_TRACE("lfs2_testbd_prog -> %d", 0);
+            return 0;
+        }
+    }
+
+    // prog
+    int err = lfs2_testbd_rawprog(cfg, block, off, buffer, size);
+    if (err) {
+        LFS2_TESTBD_TRACE("lfs2_testbd_prog -> %d", err);
+        return err;
+    }
+
+    // lose power?
+    if (bd->power_cycles > 0) {
+        bd->power_cycles -= 1;
+        if (bd->power_cycles == 0) {
+            // sync to make sure we persist the last changes
+            LFS2_ASSERT(lfs2_testbd_rawsync(cfg) == 0);
+            // simulate power loss
+            exit(33);
+        }
+    }
+
+    LFS2_TESTBD_TRACE("lfs2_testbd_prog -> %d", 0);
+    return 0;
+}
+
+int lfs2_testbd_erase(const struct lfs2_config *cfg, lfs2_block_t block) {
+    LFS2_TESTBD_TRACE("lfs2_testbd_erase(%p, 0x%"PRIx32")", (void*)cfg, block);
+    lfs2_testbd_t *bd = cfg->context;
+
+    // check if erase is valid
+    LFS2_ASSERT(block < cfg->block_count);
+
+    // block bad?
+    if (bd->cfg->erase_cycles) {
+        if (bd->wear[block] >= bd->cfg->erase_cycles) {
+            if (bd->cfg->badblock_behavior ==
+                    LFS2_TESTBD_BADBLOCK_ERASEERROR) {
+                LFS2_TESTBD_TRACE("lfs2_testbd_erase -> %d", LFS2_ERR_CORRUPT);
+                return LFS2_ERR_CORRUPT;
+            } else if (bd->cfg->badblock_behavior ==
+                    LFS2_TESTBD_BADBLOCK_ERASENOOP) {
+                LFS2_TESTBD_TRACE("lfs2_testbd_erase -> %d", 0);
+                return 0;
+            }
+        } else {
+            // mark wear
+            bd->wear[block] += 1;
+        }
+    }
+
+    // erase
+    int err = lfs2_testbd_rawerase(cfg, block);
+    if (err) {
+        LFS2_TESTBD_TRACE("lfs2_testbd_erase -> %d", err);
+        return err;
+    }
+
+    // lose power?
+    if (bd->power_cycles > 0) {
+        bd->power_cycles -= 1;
+        if (bd->power_cycles == 0) {
+            // sync to make sure we persist the last changes
+            LFS2_ASSERT(lfs2_testbd_rawsync(cfg) == 0);
+            // simulate power loss
+            exit(33);
+        }
+    }
+
+    LFS2_TESTBD_TRACE("lfs2_testbd_prog -> %d", 0);
+    return 0;
+}
+
+int lfs2_testbd_sync(const struct lfs2_config *cfg) {
+    LFS2_TESTBD_TRACE("lfs2_testbd_sync(%p)", (void*)cfg);
+    int err = lfs2_testbd_rawsync(cfg);
+    LFS2_TESTBD_TRACE("lfs2_testbd_sync -> %d", err);
+    return err;
+}
+
+
+/// simulated wear operations ///
+lfs2_testbd_swear_t lfs2_testbd_getwear(const struct lfs2_config *cfg,
+        lfs2_block_t block) {
+    LFS2_TESTBD_TRACE("lfs2_testbd_getwear(%p, %"PRIu32")", (void*)cfg, block);
+    lfs2_testbd_t *bd = cfg->context;
+
+    // check if block is valid
+    LFS2_ASSERT(bd->cfg->erase_cycles);
+    LFS2_ASSERT(block < cfg->block_count);
+
+    LFS2_TESTBD_TRACE("lfs2_testbd_getwear -> %"PRIu32, bd->wear[block]);
+    return bd->wear[block];
+}
+
+int lfs2_testbd_setwear(const struct lfs2_config *cfg,
+        lfs2_block_t block, lfs2_testbd_wear_t wear) {
+    LFS2_TESTBD_TRACE("lfs2_testbd_setwear(%p, %"PRIu32")", (void*)cfg, block);
+    lfs2_testbd_t *bd = cfg->context;
+
+    // check if block is valid
+    LFS2_ASSERT(bd->cfg->erase_cycles);
+    LFS2_ASSERT(block < cfg->block_count);
+
+    bd->wear[block] = wear;
+
+    LFS2_TESTBD_TRACE("lfs2_testbd_setwear -> %d", 0);
+    return 0;
+}

bd/lfs2_testbd.h

@@ -5,13 +5,13 @@
  * Copyright (c) 2017, Arm Limited. All rights reserved.
  * SPDX-License-Identifier: BSD-3-Clause
  */
-#ifndef LFS_TESTBD_H
-#define LFS_TESTBD_H
+#ifndef LFS2_TESTBD_H
+#define LFS2_TESTBD_H
 
-#include "lfs.h"
-#include "lfs_util.h"
-#include "bd/lfs_rambd.h"
-#include "bd/lfs_filebd.h"
+#include "lfs2.h"
+#include "lfs2_util.h"
+#include "bd/lfs2_rambd.h"
+#include "bd/lfs2_filebd.h"
 
 #ifdef __cplusplus
 extern "C"
@@ -19,26 +19,33 @@ extern "C"
 #endif
 
 
+// Block device specific tracing
+#ifdef LFS2_TESTBD_YES_TRACE
+#define LFS2_TESTBD_TRACE(...) LFS2_TRACE(__VA_ARGS__)
+#else
+#define LFS2_TESTBD_TRACE(...)
+#endif
+
 // Mode determining how "bad blocks" behave during testing. This simulates
 // some real-world circumstances such as progs not sticking (prog-noop),
 // a readonly disk (erase-noop), and ECC failures (read-error).
 //
 // Not that read-noop is not allowed. Read _must_ return a consistent (but
 // may be arbitrary) value on every read.
-enum lfs_testbd_badblock_behavior {
-    LFS_TESTBD_BADBLOCK_PROGERROR,
-    LFS_TESTBD_BADBLOCK_ERASEERROR,
-    LFS_TESTBD_BADBLOCK_READERROR,
-    LFS_TESTBD_BADBLOCK_PROGNOOP,
-    LFS_TESTBD_BADBLOCK_ERASENOOP,
+enum lfs2_testbd_badblock_behavior {
+    LFS2_TESTBD_BADBLOCK_PROGERROR,
+    LFS2_TESTBD_BADBLOCK_ERASEERROR,
+    LFS2_TESTBD_BADBLOCK_READERROR,
+    LFS2_TESTBD_BADBLOCK_PROGNOOP,
+    LFS2_TESTBD_BADBLOCK_ERASENOOP,
 };
 
 // Type for measuring wear
-typedef uint32_t lfs_testbd_wear_t;
-typedef int32_t  lfs_testbd_swear_t;
+typedef uint32_t lfs2_testbd_wear_t;
+typedef int32_t  lfs2_testbd_swear_t;
 
 // testbd config, this is required for testing
-struct lfs_testbd_config {
+struct lfs2_testbd_config {
     // 8-bit erase value to use for simulating erases. -1 does not simulate
     // erases, which can speed up testing by avoiding all the extra block-device
     // operations to store the erase value.
@@ -63,68 +70,68 @@ struct lfs_testbd_config {
 };
 
 // testbd state
-typedef struct lfs_testbd {
+typedef struct lfs2_testbd {
     union {
         struct {
-            lfs_filebd_t bd;
-            struct lfs_filebd_config cfg;
+            lfs2_filebd_t bd;
+            struct lfs2_filebd_config cfg;
         } file;
         struct {
-            lfs_rambd_t bd;
-            struct lfs_rambd_config cfg;
+            lfs2_rambd_t bd;
+            struct lfs2_rambd_config cfg;
         } ram;
     } u;
 
     bool persist;
     uint32_t power_cycles;
-    lfs_testbd_wear_t *wear;
+    lfs2_testbd_wear_t *wear;
 
-    const struct lfs_testbd_config *cfg;
-} lfs_testbd_t;
+    const struct lfs2_testbd_config *cfg;
+} lfs2_testbd_t;
 
 
 /// Block device API ///
 
-// Create a test block device using the geometry in lfs_config
+// Create a test block device using the geometry in lfs2_config
 //
 // Note that filebd is used if a path is provided, if path is NULL
 // testbd will use rambd which can be much faster.
-int lfs_testbd_create(const struct lfs_config *cfg, const char *path);
-int lfs_testbd_createcfg(const struct lfs_config *cfg, const char *path,
-        const struct lfs_testbd_config *bdcfg);
+int lfs2_testbd_create(const struct lfs2_config *cfg, const char *path);
+int lfs2_testbd_createcfg(const struct lfs2_config *cfg, const char *path,
+        const struct lfs2_testbd_config *bdcfg);
 
 // Clean up memory associated with block device
-int lfs_testbd_destroy(const struct lfs_config *cfg);
+int lfs2_testbd_destroy(const struct lfs2_config *cfg);
 
 // Read a block
-int lfs_testbd_read(const struct lfs_config *cfg, lfs_block_t block,
-        lfs_off_t off, void *buffer, lfs_size_t size);
+int lfs2_testbd_read(const struct lfs2_config *cfg, lfs2_block_t block,
+        lfs2_off_t off, void *buffer, lfs2_size_t size);
 
 // Program a block
 //
 // The block must have previously been erased.
-int lfs_testbd_prog(const struct lfs_config *cfg, lfs_block_t block,
-        lfs_off_t off, const void *buffer, lfs_size_t size);
+int lfs2_testbd_prog(const struct lfs2_config *cfg, lfs2_block_t block,
+        lfs2_off_t off, const void *buffer, lfs2_size_t size);
 
 // Erase a block
 //
 // A block must be erased before being programmed. The
 // state of an erased block is undefined.
-int lfs_testbd_erase(const struct lfs_config *cfg, lfs_block_t block);
+int lfs2_testbd_erase(const struct lfs2_config *cfg, lfs2_block_t block);
 
 // Sync the block device
-int lfs_testbd_sync(const struct lfs_config *cfg);
+int lfs2_testbd_sync(const struct lfs2_config *cfg);
 
 
 /// Additional extended API for driving test features ///
 
 // Get simulated wear on a given block
-lfs_testbd_swear_t lfs_testbd_getwear(const struct lfs_config *cfg,
-        lfs_block_t block);
+lfs2_testbd_swear_t lfs2_testbd_getwear(const struct lfs2_config *cfg,
+        lfs2_block_t block);
 
 // Manually set simulated wear on a given block
-int lfs_testbd_setwear(const struct lfs_config *cfg,
-        lfs_block_t block, lfs_testbd_wear_t wear);
+int lfs2_testbd_setwear(const struct lfs2_config *cfg,
+        lfs2_block_t block, lfs2_testbd_wear_t wear);
 
 
 #ifdef __cplusplus

bd/lfs_filebd.h

@@ -1,65 +0,0 @@
-/*
- * Block device emulated in a file
- *
- * Copyright (c) 2017, Arm Limited. All rights reserved.
- * SPDX-License-Identifier: BSD-3-Clause
- */
-#ifndef LFS_FILEBD_H
-#define LFS_FILEBD_H
-
-#include "lfs.h"
-#include "lfs_util.h"
-
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
-// filebd config (optional)
-struct lfs_filebd_config {
-    // 8-bit erase value to use for simulating erases. -1 does not simulate
-    // erases, which can speed up testing by avoiding all the extra block-device
-    // operations to store the erase value.
-    int32_t erase_value;
-};
-
-// filebd state
-typedef struct lfs_filebd {
-    int fd;
-    const struct lfs_filebd_config *cfg;
-} lfs_filebd_t;
-
-
-// Create a file block device using the geometry in lfs_config
-int lfs_filebd_create(const struct lfs_config *cfg, const char *path);
-int lfs_filebd_createcfg(const struct lfs_config *cfg, const char *path,
-        const struct lfs_filebd_config *bdcfg);
-
-// Clean up memory associated with block device
-int lfs_filebd_destroy(const struct lfs_config *cfg);
-
-// Read a block
-int lfs_filebd_read(const struct lfs_config *cfg, lfs_block_t block,
-        lfs_off_t off, void *buffer, lfs_size_t size);
-
-// Program a block
-//
-// The block must have previously been erased.
-int lfs_filebd_prog(const struct lfs_config *cfg, lfs_block_t block,
-        lfs_off_t off, const void *buffer, lfs_size_t size);
-
-// Erase a block
-//
-// A block must be erased before being programmed. The
-// state of an erased block is undefined.
-int lfs_filebd_erase(const struct lfs_config *cfg, lfs_block_t block);
-
-// Sync the block device
-int lfs_filebd_sync(const struct lfs_config *cfg);
-
-
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
-
-#endif

bd/lfs_rambd.c

@@ -1,138 +0,0 @@
-/*
- * Block device emulated in RAM
- *
- * Copyright (c) 2017, Arm Limited. All rights reserved.
- * SPDX-License-Identifier: BSD-3-Clause
- */
-#include "bd/lfs_rambd.h"
-
-int lfs_rambd_createcfg(const struct lfs_config *cfg,
-        const struct lfs_rambd_config *bdcfg) {
-    LFS_TRACE("lfs_rambd_createcfg(%p {.context=%p, "
-                ".read=%p, .prog=%p, .erase=%p, .sync=%p, "
-                ".read_size=%"PRIu32", .prog_size=%"PRIu32", "
-                ".block_size=%"PRIu32", .block_count=%"PRIu32"}, "
-                "%p {.erase_value=%"PRId32", .buffer=%p})",
-            (void*)cfg, cfg->context,
-            (void*)(uintptr_t)cfg->read, (void*)(uintptr_t)cfg->prog,
-            (void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
-            cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count,
-            (void*)bdcfg, bdcfg->erase_value, bdcfg->buffer);
-    lfs_rambd_t *bd = cfg->context;
-    bd->cfg = bdcfg;
-
-    // allocate buffer?
-    if (bd->cfg->buffer) {
-        bd->buffer = bd->cfg->buffer;
-    } else {
-        bd->buffer = lfs_malloc(cfg->block_size * cfg->block_count);
-        if (!bd->buffer) {
-            LFS_TRACE("lfs_rambd_createcfg -> %d", LFS_ERR_NOMEM);
-            return LFS_ERR_NOMEM;
-        }
-    }
-
-    // zero for reproducability?
-    if (bd->cfg->erase_value != -1) {
-        memset(bd->buffer, bd->cfg->erase_value,
-                cfg->block_size * cfg->block_count);
-    }
-
-    LFS_TRACE("lfs_rambd_createcfg -> %d", 0);
-    return 0;
-}
-
-int lfs_rambd_create(const struct lfs_config *cfg) {
-    LFS_TRACE("lfs_rambd_create(%p {.context=%p, "
-                ".read=%p, .prog=%p, .erase=%p, .sync=%p, "
-                ".read_size=%"PRIu32", .prog_size=%"PRIu32", "
-                ".block_size=%"PRIu32", .block_count=%"PRIu32"})",
-            (void*)cfg, cfg->context,
-            (void*)(uintptr_t)cfg->read, (void*)(uintptr_t)cfg->prog,
-            (void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
-            cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count);
-    static const struct lfs_rambd_config defaults = {.erase_value=-1};
-    int err = lfs_rambd_createcfg(cfg, &defaults);
-    LFS_TRACE("lfs_rambd_create -> %d", err);
-    return err;
-}
-
-int lfs_rambd_destroy(const struct lfs_config *cfg) {
-    LFS_TRACE("lfs_rambd_destroy(%p)", (void*)cfg);
-    // clean up memory
-    lfs_rambd_t *bd = cfg->context;
-    if (!bd->cfg->buffer) {
-        lfs_free(bd->buffer);
-    }
-    LFS_TRACE("lfs_rambd_destroy -> %d", 0);
-    return 0;
-}
-
-int lfs_rambd_read(const struct lfs_config *cfg, lfs_block_t block,
-        lfs_off_t off, void *buffer, lfs_size_t size) {
-    LFS_TRACE("lfs_rambd_read(%p, 0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
-            (void*)cfg, block, off, buffer, size);
-    lfs_rambd_t *bd = cfg->context;
-
-    // check if read is valid
-    LFS_ASSERT(off  % cfg->read_size == 0);
-    LFS_ASSERT(size % cfg->read_size == 0);
-    LFS_ASSERT(block < cfg->block_count);
-
-    // read data
-    memcpy(buffer, &bd->buffer[block*cfg->block_size + off], size);
-
-    LFS_TRACE("lfs_rambd_read -> %d", 0);
-    return 0;
-}
-
-int lfs_rambd_prog(const struct lfs_config *cfg, lfs_block_t block,
-        lfs_off_t off, const void *buffer, lfs_size_t size) {
-    LFS_TRACE("lfs_rambd_prog(%p, 0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
-            (void*)cfg, block, off, buffer, size);
-    lfs_rambd_t *bd = cfg->context;
-
-    // check if write is valid
-    LFS_ASSERT(off  % cfg->prog_size == 0);
-    LFS_ASSERT(size % cfg->prog_size == 0);
-    LFS_ASSERT(block < cfg->block_count);
-
-    // check that data was erased? only needed for testing
-    if (bd->cfg->erase_value != -1) {
-        for (lfs_off_t i = 0; i < size; i++) {
-            LFS_ASSERT(bd->buffer[block*cfg->block_size + off + i] ==
-                    bd->cfg->erase_value);
-        }
-    }
-
-    // program data
-    memcpy(&bd->buffer[block*cfg->block_size + off], buffer, size);
-
-    LFS_TRACE("lfs_rambd_prog -> %d", 0);
-    return 0;
-}
-
-int lfs_rambd_erase(const struct lfs_config *cfg, lfs_block_t block) {
-    LFS_TRACE("lfs_rambd_erase(%p, 0x%"PRIx32")", (void*)cfg, block);
-    lfs_rambd_t *bd = cfg->context;
-
-    // check if erase is valid
-    LFS_ASSERT(block < cfg->block_count);
-
-    // erase, only needed for testing
-    if (bd->cfg->erase_value != -1) {
-        memset(&bd->buffer[block*cfg->block_size],
-                bd->cfg->erase_value, cfg->block_size);
-    }
-
-    LFS_TRACE("lfs_rambd_erase -> %d", 0);
-    return 0;
-}
-
-int lfs_rambd_sync(const struct lfs_config *cfg) {
-    LFS_TRACE("lfs_rambd_sync(%p)", (void*)cfg);
-    // sync does nothing because we aren't backed by anything real
-    (void)cfg;
-    LFS_TRACE("lfs_rambd_sync -> %d", 0);
-    return 0;
-}

bd/lfs_rambd.h

@@ -1,67 +0,0 @@
-/*
- * Block device emulated in RAM
- *
- * Copyright (c) 2017, Arm Limited. All rights reserved.
- * SPDX-License-Identifier: BSD-3-Clause
- */
-#ifndef LFS_RAMBD_H
-#define LFS_RAMBD_H
-
-#include "lfs.h"
-#include "lfs_util.h"
-
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
-// rambd config (optional)
-struct lfs_rambd_config {
-    // 8-bit erase value to simulate erasing with. -1 indicates no erase
-    // occurs, which is still a valid block device
-    int32_t erase_value;
-
-    // Optional statically allocated buffer for the block device.
-    void *buffer;
-};
-
-// rambd state
-typedef struct lfs_rambd {
-    uint8_t *buffer;
-    const struct lfs_rambd_config *cfg;
-} lfs_rambd_t;
-
-
-// Create a RAM block device using the geometry in lfs_config
-int lfs_rambd_create(const struct lfs_config *cfg);
-int lfs_rambd_createcfg(const struct lfs_config *cfg,
-        const struct lfs_rambd_config *bdcfg);
-
-// Clean up memory associated with block device
-int lfs_rambd_destroy(const struct lfs_config *cfg);
-
-// Read a block
-int lfs_rambd_read(const struct lfs_config *cfg, lfs_block_t block,
-        lfs_off_t off, void *buffer, lfs_size_t size);
-
-// Program a block
-//
-// The block must have previously been erased.
-int lfs_rambd_prog(const struct lfs_config *cfg, lfs_block_t block,
-        lfs_off_t off, const void *buffer, lfs_size_t size);
-
-// Erase a block
-//
-// A block must be erased before being programmed. The
-// state of an erased block is undefined.
-int lfs_rambd_erase(const struct lfs_config *cfg, lfs_block_t block);
-
-// Sync the block device
-int lfs_rambd_sync(const struct lfs_config *cfg);
-
-
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
-
-#endif

bd/lfs_testbd.c

@@ -1,300 +0,0 @@
-/*
- * Testing block device, wraps filebd and rambd while providing a bunch
- * of hooks for testing littlefs in various conditions.
- *
- * Copyright (c) 2017, Arm Limited. All rights reserved.
- * SPDX-License-Identifier: BSD-3-Clause
- */
-#include "bd/lfs_testbd.h"
-
-#include <stdlib.h>
-
-
-int lfs_testbd_createcfg(const struct lfs_config *cfg, const char *path,
-        const struct lfs_testbd_config *bdcfg) {
-    LFS_TRACE("lfs_testbd_createcfg(%p {.context=%p, "
-                ".read=%p, .prog=%p, .erase=%p, .sync=%p, "
-                ".read_size=%"PRIu32", .prog_size=%"PRIu32", "
-                ".block_size=%"PRIu32", .block_count=%"PRIu32"}, "
-                "\"%s\", "
-                "%p {.erase_value=%"PRId32", .erase_cycles=%"PRIu32", "
-                ".badblock_behavior=%"PRIu8", .power_cycles=%"PRIu32", "
-                ".buffer=%p, .wear_buffer=%p})",
-            (void*)cfg, cfg->context,
-            (void*)(uintptr_t)cfg->read, (void*)(uintptr_t)cfg->prog,
-            (void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
-            cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count,
-            path, (void*)bdcfg, bdcfg->erase_value, bdcfg->erase_cycles,
-            bdcfg->badblock_behavior, bdcfg->power_cycles,
-            bdcfg->buffer, bdcfg->wear_buffer);
-    lfs_testbd_t *bd = cfg->context;
-    bd->cfg = bdcfg;
-
-    // setup testing things
-    bd->persist = path;
-    bd->power_cycles = bd->cfg->power_cycles;
-
-    if (bd->cfg->erase_cycles) {
-        if (bd->cfg->wear_buffer) {
-            bd->wear = bd->cfg->wear_buffer;
-        } else {
-            bd->wear = lfs_malloc(sizeof(lfs_testbd_wear_t) * cfg->block_count);
-            if (!bd->wear) {
-                LFS_TRACE("lfs_testbd_createcfg -> %d", LFS_ERR_NOMEM);
-                return LFS_ERR_NOMEM;
-            }
-        }
-
-        memset(bd->wear, 0, sizeof(lfs_testbd_wear_t) * cfg->block_count);
-    }
-
-    // create underlying block device
-    if (bd->persist) {
-        bd->u.file.cfg = (struct lfs_filebd_config){
-            .erase_value = bd->cfg->erase_value,
-        };
-        int err = lfs_filebd_createcfg(cfg, path, &bd->u.file.cfg);
-        LFS_TRACE("lfs_testbd_createcfg -> %d", err);
-        return err;
-    } else {
-        bd->u.ram.cfg = (struct lfs_rambd_config){
-            .erase_value = bd->cfg->erase_value,
-            .buffer = bd->cfg->buffer,
-        };
-        int err = lfs_rambd_createcfg(cfg, &bd->u.ram.cfg);
-        LFS_TRACE("lfs_testbd_createcfg -> %d", err);
-        return err;
-    }
-}
-
-int lfs_testbd_create(const struct lfs_config *cfg, const char *path) {
-    LFS_TRACE("lfs_testbd_create(%p {.context=%p, "
-                ".read=%p, .prog=%p, .erase=%p, .sync=%p, "
-                ".read_size=%"PRIu32", .prog_size=%"PRIu32", "
-                ".block_size=%"PRIu32", .block_count=%"PRIu32"}, "
-                "\"%s\")",
-            (void*)cfg, cfg->context,
-            (void*)(uintptr_t)cfg->read, (void*)(uintptr_t)cfg->prog,
-            (void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
-            cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count,
-            path);
-    static const struct lfs_testbd_config defaults = {.erase_value=-1};
-    int err = lfs_testbd_createcfg(cfg, path, &defaults);
-    LFS_TRACE("lfs_testbd_create -> %d", err);
-    return err;
-}
-
-int lfs_testbd_destroy(const struct lfs_config *cfg) {
-    LFS_TRACE("lfs_testbd_destroy(%p)", (void*)cfg);
-    lfs_testbd_t *bd = cfg->context;
-    if (bd->cfg->erase_cycles && !bd->cfg->wear_buffer) {
-        lfs_free(bd->wear);
-    }
-
-    if (bd->persist) {
-        int err = lfs_filebd_destroy(cfg);
-        LFS_TRACE("lfs_testbd_destroy -> %d", err);
-        return err;
-    } else {
-        int err = lfs_rambd_destroy(cfg);
-        LFS_TRACE("lfs_testbd_destroy -> %d", err);
-        return err;
-    }
-}
-
-/// Internal mapping to block devices ///
-static int lfs_testbd_rawread(const struct lfs_config *cfg, lfs_block_t block,
-        lfs_off_t off, void *buffer, lfs_size_t size) {
-    lfs_testbd_t *bd = cfg->context;
-    if (bd->persist) {
-        return lfs_filebd_read(cfg, block, off, buffer, size);
-    } else {
-        return lfs_rambd_read(cfg, block, off, buffer, size);
-    }
-}
-
-static int lfs_testbd_rawprog(const struct lfs_config *cfg, lfs_block_t block,
-        lfs_off_t off, const void *buffer, lfs_size_t size) {
-    lfs_testbd_t *bd = cfg->context;
-    if (bd->persist) {
-        return lfs_filebd_prog(cfg, block, off, buffer, size);
-    } else {
-        return lfs_rambd_prog(cfg, block, off, buffer, size);
-    }
-}
-
-static int lfs_testbd_rawerase(const struct lfs_config *cfg,
-        lfs_block_t block) {
-    lfs_testbd_t *bd = cfg->context;
-    if (bd->persist) {
-        return lfs_filebd_erase(cfg, block);
-    } else {
-        return lfs_rambd_erase(cfg, block);
-    }
-}
-
-static int lfs_testbd_rawsync(const struct lfs_config *cfg) {
-    lfs_testbd_t *bd = cfg->context;
-    if (bd->persist) {
-        return lfs_filebd_sync(cfg);
-    } else {
-        return lfs_rambd_sync(cfg);
-    }
-}
-
-/// block device API ///
-int lfs_testbd_read(const struct lfs_config *cfg, lfs_block_t block,
-        lfs_off_t off, void *buffer, lfs_size_t size) {
-    LFS_TRACE("lfs_testbd_read(%p, 0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
-            (void*)cfg, block, off, buffer, size);
-    lfs_testbd_t *bd = cfg->context;
-
-    // check if read is valid
-    LFS_ASSERT(off  % cfg->read_size == 0);
-    LFS_ASSERT(size % cfg->read_size == 0);
-    LFS_ASSERT(block < cfg->block_count);
-
-    // block bad?
-    if (bd->cfg->erase_cycles && bd->wear[block] >= bd->cfg->erase_cycles &&
-            bd->cfg->badblock_behavior == LFS_TESTBD_BADBLOCK_READERROR) {
-        LFS_TRACE("lfs_testbd_read -> %d", LFS_ERR_CORRUPT);
-        return LFS_ERR_CORRUPT;
-    }
-
-    // read
-    int err = lfs_testbd_rawread(cfg, block, off, buffer, size);
-    LFS_TRACE("lfs_testbd_read -> %d", err);
-    return err;
-}
-
-int lfs_testbd_prog(const struct lfs_config *cfg, lfs_block_t block,
-        lfs_off_t off, const void *buffer, lfs_size_t size) {
-    LFS_TRACE("lfs_testbd_prog(%p, 0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
-            (void*)cfg, block, off, buffer, size);
-    lfs_testbd_t *bd = cfg->context;
-
-    // check if write is valid
-    LFS_ASSERT(off  % cfg->prog_size == 0);
-    LFS_ASSERT(size % cfg->prog_size == 0);
-    LFS_ASSERT(block < cfg->block_count);
-
-    // block bad?
-    if (bd->cfg->erase_cycles && bd->wear[block] >= bd->cfg->erase_cycles) {
-        if (bd->cfg->badblock_behavior ==
-                LFS_TESTBD_BADBLOCK_PROGERROR) {
-            LFS_TRACE("lfs_testbd_prog -> %d", LFS_ERR_CORRUPT);
-            return LFS_ERR_CORRUPT;
-        } else if (bd->cfg->badblock_behavior ==
-                LFS_TESTBD_BADBLOCK_PROGNOOP ||
-                bd->cfg->badblock_behavior ==
-                LFS_TESTBD_BADBLOCK_ERASENOOP) {
-            LFS_TRACE("lfs_testbd_prog -> %d", 0);
-            return 0;
-        }
-    }
-
-    // prog
-    int err = lfs_testbd_rawprog(cfg, block, off, buffer, size);
-    if (err) {
-        LFS_TRACE("lfs_testbd_prog -> %d", err);
-        return err;
-    }
-
-    // lose power?
-    if (bd->power_cycles > 0) {
-        bd->power_cycles -= 1;
-        if (bd->power_cycles == 0) {
-            // sync to make sure we persist the last changes
-            assert(lfs_testbd_rawsync(cfg) == 0);
-            // simulate power loss
-            exit(33);
-        }
-    }
-
-    LFS_TRACE("lfs_testbd_prog -> %d", 0);
-    return 0;
-}
-
-int lfs_testbd_erase(const struct lfs_config *cfg, lfs_block_t block) {
-    LFS_TRACE("lfs_testbd_erase(%p, 0x%"PRIx32")", (void*)cfg, block);
-    lfs_testbd_t *bd = cfg->context;
-
-    // check if erase is valid
-    LFS_ASSERT(block < cfg->block_count);
-
-    // block bad?
-    if (bd->cfg->erase_cycles) {
-        if (bd->wear[block] >= bd->cfg->erase_cycles) {
-            if (bd->cfg->badblock_behavior ==
-                    LFS_TESTBD_BADBLOCK_ERASEERROR) {
-                LFS_TRACE("lfs_testbd_erase -> %d", LFS_ERR_CORRUPT);
-                return LFS_ERR_CORRUPT;
-            } else if (bd->cfg->badblock_behavior ==
-                    LFS_TESTBD_BADBLOCK_ERASENOOP) {
-                LFS_TRACE("lfs_testbd_erase -> %d", 0);
-                return 0;
-            }
-        } else {
-            // mark wear
-            bd->wear[block] += 1;
-        }
-    }
-
-    // erase
-    int err = lfs_testbd_rawerase(cfg, block);
-    if (err) {
-        LFS_TRACE("lfs_testbd_erase -> %d", err);
-        return err;
-    }
-
-    // lose power?
-    if (bd->power_cycles > 0) {
-        bd->power_cycles -= 1;
-        if (bd->power_cycles == 0) {
-            // sync to make sure we persist the last changes
-            assert(lfs_testbd_rawsync(cfg) == 0);
-            // simulate power loss
-            exit(33);
-        }
-    }
-
-    LFS_TRACE("lfs_testbd_prog -> %d", 0);
-    return 0;
-}
-
-int lfs_testbd_sync(const struct lfs_config *cfg) {
-    LFS_TRACE("lfs_testbd_sync(%p)", (void*)cfg);
-    int err = lfs_testbd_rawsync(cfg);
-    LFS_TRACE("lfs_testbd_sync -> %d", err);
-    return err;
-}
-
-
-/// simulated wear operations ///
-lfs_testbd_swear_t lfs_testbd_getwear(const struct lfs_config *cfg,
-        lfs_block_t block) {
-    LFS_TRACE("lfs_testbd_getwear(%p, %"PRIu32")", (void*)cfg, block);
-    lfs_testbd_t *bd = cfg->context;
-
-    // check if block is valid
-    LFS_ASSERT(bd->cfg->erase_cycles);
-    LFS_ASSERT(block < cfg->block_count);
-
-    LFS_TRACE("lfs_testbd_getwear -> %"PRIu32, bd->wear[block]);
-    return bd->wear[block];
-}
-
-int lfs_testbd_setwear(const struct lfs_config *cfg,
-        lfs_block_t block, lfs_testbd_wear_t wear) {
-    LFS_TRACE("lfs_testbd_setwear(%p, %"PRIu32")", (void*)cfg, block);
-    lfs_testbd_t *bd = cfg->context;
-
-    // check if block is valid
-    LFS_ASSERT(bd->cfg->erase_cycles);
-    LFS_ASSERT(block < cfg->block_count);
-
-    bd->wear[block] = wear;
-
-    LFS_TRACE("lfs_testbd_setwear -> %d", 0);
-    return 0;
-}

lfs2.h

@@ -4,11 +4,12 @@
  * Copyright (c) 2017, Arm Limited. All rights reserved.
  * SPDX-License-Identifier: BSD-3-Clause
  */
-#ifndef LFS_H
-#define LFS_H
+#ifndef LFS2_H
+#define LFS2_H
 
 #include <stdint.h>
 #include <stdbool.h>
+#include "lfs2_util.h"
 
 #ifdef __cplusplus
 extern "C"
@@ -21,177 +22,192 @@ extern "C"
 // Software library version
 // Major (top-nibble), incremented on backwards incompatible changes
 // Minor (bottom-nibble), incremented on feature additions
-#define LFS_VERSION 0x00020001
-#define LFS_VERSION_MAJOR (0xffff & (LFS_VERSION >> 16))
-#define LFS_VERSION_MINOR (0xffff & (LFS_VERSION >>  0))
+#define LFS2_VERSION 0x00020004
+#define LFS2_VERSION_MAJOR (0xffff & (LFS2_VERSION >> 16))
+#define LFS2_VERSION_MINOR (0xffff & (LFS2_VERSION >>  0))
 
 // Version of On-disk data structures
 // Major (top-nibble), incremented on backwards incompatible changes
 // Minor (bottom-nibble), incremented on feature additions
-#define LFS_DISK_VERSION 0x00020000
-#define LFS_DISK_VERSION_MAJOR (0xffff & (LFS_DISK_VERSION >> 16))
-#define LFS_DISK_VERSION_MINOR (0xffff & (LFS_DISK_VERSION >>  0))
+#define LFS2_DISK_VERSION 0x00020000
+#define LFS2_DISK_VERSION_MAJOR (0xffff & (LFS2_DISK_VERSION >> 16))
+#define LFS2_DISK_VERSION_MINOR (0xffff & (LFS2_DISK_VERSION >>  0))
 
 
 /// Definitions ///
 
 // Type definitions
-typedef uint32_t lfs_size_t;
-typedef uint32_t lfs_off_t;
+typedef uint32_t lfs2_size_t;
+typedef uint32_t lfs2_off_t;
 
-typedef int32_t  lfs_ssize_t;
-typedef int32_t  lfs_soff_t;
+typedef int32_t  lfs2_ssize_t;
+typedef int32_t  lfs2_soff_t;
 
-typedef uint32_t lfs_block_t;
+typedef uint32_t lfs2_block_t;
 
 // Maximum name size in bytes, may be redefined to reduce the size of the
 // info struct. Limited to <= 1022. Stored in superblock and must be
 // respected by other littlefs drivers.
-#ifndef LFS_NAME_MAX
-#define LFS_NAME_MAX 255
+#ifndef LFS2_NAME_MAX
+#define LFS2_NAME_MAX 255
 #endif
 
 // Maximum size of a file in bytes, may be redefined to limit to support other
 // drivers. Limited on disk to <= 4294967296. However, above 2147483647 the
-// functions lfs_file_seek, lfs_file_size, and lfs_file_tell will return
+// functions lfs2_file_seek, lfs2_file_size, and lfs2_file_tell will return
 // incorrect values due to using signed integers. Stored in superblock and
 // must be respected by other littlefs drivers.
-#ifndef LFS_FILE_MAX
-#define LFS_FILE_MAX 2147483647
+#ifndef LFS2_FILE_MAX
+#define LFS2_FILE_MAX 2147483647
 #endif
 
 // Maximum size of custom attributes in bytes, may be redefined, but there is
-// no real benefit to using a smaller LFS_ATTR_MAX. Limited to <= 1022.
-#ifndef LFS_ATTR_MAX
-#define LFS_ATTR_MAX 1022
+// no real benefit to using a smaller LFS2_ATTR_MAX. Limited to <= 1022.
+#ifndef LFS2_ATTR_MAX
+#define LFS2_ATTR_MAX 1022
 #endif
 
 // Possible error codes, these are negative to allow
 // valid positive return values
-enum lfs_error {
-    LFS_ERR_OK          = 0,    // No error
-    LFS_ERR_IO          = -5,   // Error during device operation
-    LFS_ERR_CORRUPT     = -84,  // Corrupted
-    LFS_ERR_NOENT       = -2,   // No directory entry
-    LFS_ERR_EXIST       = -17,  // Entry already exists
-    LFS_ERR_NOTDIR      = -20,  // Entry is not a dir
-    LFS_ERR_ISDIR       = -21,  // Entry is a dir
-    LFS_ERR_NOTEMPTY    = -39,  // Dir is not empty
-    LFS_ERR_BADF        = -9,   // Bad file number
-    LFS_ERR_FBIG        = -27,  // File too large
-    LFS_ERR_INVAL       = -22,  // Invalid parameter
-    LFS_ERR_NOSPC       = -28,  // No space left on device
-    LFS_ERR_NOMEM       = -12,  // No more memory available
-    LFS_ERR_NOATTR      = -61,  // No data/attr available
-    LFS_ERR_NAMETOOLONG = -36,  // File name too long
+enum lfs2_error {
+    LFS2_ERR_OK          = 0,    // No error
+    LFS2_ERR_IO          = -5,   // Error during device operation
+    LFS2_ERR_CORRUPT     = -84,  // Corrupted
+    LFS2_ERR_NOENT       = -2,   // No directory entry
+    LFS2_ERR_EXIST       = -17,  // Entry already exists
+    LFS2_ERR_NOTDIR      = -20,  // Entry is not a dir
+    LFS2_ERR_ISDIR       = -21,  // Entry is a dir
+    LFS2_ERR_NOTEMPTY    = -39,  // Dir is not empty
+    LFS2_ERR_BADF        = -9,   // Bad file number
+    LFS2_ERR_FBIG        = -27,  // File too large
+    LFS2_ERR_INVAL       = -22,  // Invalid parameter
+    LFS2_ERR_NOSPC       = -28,  // No space left on device
+    LFS2_ERR_NOMEM       = -12,  // No more memory available
+    LFS2_ERR_NOATTR      = -61,  // No data/attr available
+    LFS2_ERR_NAMETOOLONG = -36,  // File name too long
 };
 
 // File types
-enum lfs_type {
+enum lfs2_type {
     // file types
-    LFS_TYPE_REG            = 0x001,
-    LFS_TYPE_DIR            = 0x002,
+    LFS2_TYPE_REG            = 0x001,
+    LFS2_TYPE_DIR            = 0x002,
 
     // internally used types
-    LFS_TYPE_SPLICE         = 0x400,
-    LFS_TYPE_NAME           = 0x000,
-    LFS_TYPE_STRUCT         = 0x200,
-    LFS_TYPE_USERATTR       = 0x300,
-    LFS_TYPE_FROM           = 0x100,
-    LFS_TYPE_TAIL           = 0x600,
-    LFS_TYPE_GLOBALS        = 0x700,
-    LFS_TYPE_CRC            = 0x500,
+    LFS2_TYPE_SPLICE         = 0x400,
+    LFS2_TYPE_NAME           = 0x000,
+    LFS2_TYPE_STRUCT         = 0x200,
+    LFS2_TYPE_USERATTR       = 0x300,
+    LFS2_TYPE_FROM           = 0x100,
+    LFS2_TYPE_TAIL           = 0x600,
+    LFS2_TYPE_GLOBALS        = 0x700,
+    LFS2_TYPE_CRC            = 0x500,
 
     // internally used type specializations
-    LFS_TYPE_CREATE         = 0x401,
-    LFS_TYPE_DELETE         = 0x4ff,
-    LFS_TYPE_SUPERBLOCK     = 0x0ff,
-    LFS_TYPE_DIRSTRUCT      = 0x200,
-    LFS_TYPE_CTZSTRUCT      = 0x202,
-    LFS_TYPE_INLINESTRUCT   = 0x201,
-    LFS_TYPE_SOFTTAIL       = 0x600,
-    LFS_TYPE_HARDTAIL       = 0x601,
-    LFS_TYPE_MOVESTATE      = 0x7ff,
+    LFS2_TYPE_CREATE         = 0x401,
+    LFS2_TYPE_DELETE         = 0x4ff,
+    LFS2_TYPE_SUPERBLOCK     = 0x0ff,
+    LFS2_TYPE_DIRSTRUCT      = 0x200,
+    LFS2_TYPE_CTZSTRUCT      = 0x202,
+    LFS2_TYPE_INLINESTRUCT   = 0x201,
+    LFS2_TYPE_SOFTTAIL       = 0x600,
+    LFS2_TYPE_HARDTAIL       = 0x601,
+    LFS2_TYPE_MOVESTATE      = 0x7ff,
 
     // internal chip sources
-    LFS_FROM_NOOP           = 0x000,
-    LFS_FROM_MOVE           = 0x101,
-    LFS_FROM_USERATTRS      = 0x102,
+    LFS2_FROM_NOOP           = 0x000,
+    LFS2_FROM_MOVE           = 0x101,
+    LFS2_FROM_USERATTRS      = 0x102,
 };
 
 // File open flags
-enum lfs_open_flags {
+enum lfs2_open_flags {
     // open flags
-    LFS_O_RDONLY = 1,         // Open a file as read only
-    LFS_O_WRONLY = 2,         // Open a file as write only
-    LFS_O_RDWR   = 3,         // Open a file as read and write
-    LFS_O_CREAT  = 0x0100,    // Create a file if it does not exist
-    LFS_O_EXCL   = 0x0200,    // Fail if a file already exists
-    LFS_O_TRUNC  = 0x0400,    // Truncate the existing file to zero size
-    LFS_O_APPEND = 0x0800,    // Move to end of file on every write
+    LFS2_O_RDONLY = 1,         // Open a file as read only
+#ifndef LFS2_READONLY
+    LFS2_O_WRONLY = 2,         // Open a file as write only
+    LFS2_O_RDWR   = 3,         // Open a file as read and write
+    LFS2_O_CREAT  = 0x0100,    // Create a file if it does not exist
+    LFS2_O_EXCL   = 0x0200,    // Fail if a file already exists
+    LFS2_O_TRUNC  = 0x0400,    // Truncate the existing file to zero size
+    LFS2_O_APPEND = 0x0800,    // Move to end of file on every write
+#endif
 
     // internally used flags
-    LFS_F_DIRTY   = 0x010000, // File does not match storage
-    LFS_F_WRITING = 0x020000, // File has been written since last flush
-    LFS_F_READING = 0x040000, // File has been read since last flush
-    LFS_F_ERRED   = 0x080000, // An error occured during write
-    LFS_F_INLINE  = 0x100000, // Currently inlined in directory entry
-    LFS_F_OPENED  = 0x200000, // File has been opened
+#ifndef LFS2_READONLY
+    LFS2_F_DIRTY   = 0x010000, // File does not match storage
+    LFS2_F_WRITING = 0x020000, // File has been written since last flush
+#endif
+    LFS2_F_READING = 0x040000, // File has been read since last flush
+#ifndef LFS2_READONLY
+    LFS2_F_ERRED   = 0x080000, // An error occurred during write
+#endif
+    LFS2_F_INLINE  = 0x100000, // Currently inlined in directory entry
 };
 
 // File seek flags
-enum lfs_whence_flags {
-    LFS_SEEK_SET = 0,   // Seek relative to an absolute position
-    LFS_SEEK_CUR = 1,   // Seek relative to the current file position
-    LFS_SEEK_END = 2,   // Seek relative to the end of the file
+enum lfs2_whence_flags {
+    LFS2_SEEK_SET = 0,   // Seek relative to an absolute position
+    LFS2_SEEK_CUR = 1,   // Seek relative to the current file position
+    LFS2_SEEK_END = 2,   // Seek relative to the end of the file
 };
 
 
 // Configuration provided during initialization of the littlefs
-struct lfs_config {
+struct lfs2_config {
     // Opaque user provided context that can be used to pass
     // information to the block device operations
     void *context;
 
-    // Read a region in a block. Negative error codes are propogated
+    // Read a region in a block. Negative error codes are propagated
     // to the user.
-    int (*read)(const struct lfs_config *c, lfs_block_t block,
-            lfs_off_t off, void *buffer, lfs_size_t size);
+    int (*read)(const struct lfs2_config *c, lfs2_block_t block,
+            lfs2_off_t off, void *buffer, lfs2_size_t size);
 
     // Program a region in a block. The block must have previously
-    // been erased. Negative error codes are propogated to the user.
-    // May return LFS_ERR_CORRUPT if the block should be considered bad.
-    int (*prog)(const struct lfs_config *c, lfs_block_t block,
-            lfs_off_t off, const void *buffer, lfs_size_t size);
+    // been erased. Negative error codes are propagated to the user.
+    // May return LFS2_ERR_CORRUPT if the block should be considered bad.
+    int (*prog)(const struct lfs2_config *c, lfs2_block_t block,
+            lfs2_off_t off, const void *buffer, lfs2_size_t size);
 
     // Erase a block. A block must be erased before being programmed.
     // The state of an erased block is undefined. Negative error codes
-    // are propogated to the user.
-    // May return LFS_ERR_CORRUPT if the block should be considered bad.
-    int (*erase)(const struct lfs_config *c, lfs_block_t block);
+    // are propagated to the user.
+    // May return LFS2_ERR_CORRUPT if the block should be considered bad.
+    int (*erase)(const struct lfs2_config *c, lfs2_block_t block);
 
     // Sync the state of the underlying block device. Negative error codes
-    // are propogated to the user.
-    int (*sync)(const struct lfs_config *c);
+    // are propagated to the user.
+    int (*sync)(const struct lfs2_config *c);
 
-    // Minimum size of a block read. All read operations will be a
+#ifdef LFS2_THREADSAFE
+    // Lock the underlying block device. Negative error codes
+    // are propagated to the user.
+    int (*lock)(const struct lfs2_config *c);
+
+    // Unlock the underlying block device. Negative error codes
+    // are propagated to the user.
+    int (*unlock)(const struct lfs2_config *c);
+#endif
+
+    // Minimum size of a block read in bytes. All read operations will be a
     // multiple of this value.
-    lfs_size_t read_size;
+    lfs2_size_t read_size;
 
-    // Minimum size of a block program. All program operations will be a
-    // multiple of this value.
-    lfs_size_t prog_size;
+    // Minimum size of a block program in bytes. All program operations will be
+    // a multiple of this value.
+    lfs2_size_t prog_size;
 
-    // Size of an erasable block. This does not impact ram consumption and
-    // may be larger than the physical erase size. However, non-inlined files
-    // take up at minimum one block. Must be a multiple of the read
-    // and program sizes.
-    lfs_size_t block_size;
+    // Size of an erasable block in bytes. This does not impact ram consumption
+    // and may be larger than the physical erase size. However, non-inlined
+    // files take up at minimum one block. Must be a multiple of the read and
+    // program sizes.
+    lfs2_size_t block_size;
 
     // Number of erasable blocks on the device.
-    lfs_size_t block_count;
+    lfs2_size_t block_count;
 
-    // Number of erase cycles before littlefs evicts metadata logs and moves 
+    // Number of erase cycles before littlefs evicts metadata logs and moves
     // the metadata to another block. Suggested values are in the
     // range 100-1000, with large values having better performance at the cost
     // of less consistent wear distribution.
@@ -199,67 +215,73 @@ struct lfs_config {
     // Set to -1 to disable block-level wear-leveling.
     int32_t block_cycles;
 
-    // Size of block caches. Each cache buffers a portion of a block in RAM.
-    // The littlefs needs a read cache, a program cache, and one additional
+    // Size of block caches in bytes. Each cache buffers a portion of a block in
+    // RAM. The littlefs needs a read cache, a program cache, and one additional
     // cache per file. Larger caches can improve performance by storing more
-    // data and reducing the number of disk accesses. Must be a multiple of
-    // the read and program sizes, and a factor of the block size.
-    lfs_size_t cache_size;
+    // data and reducing the number of disk accesses. Must be a multiple of the
+    // read and program sizes, and a factor of the block size.
+    lfs2_size_t cache_size;
 
     // Size of the lookahead buffer in bytes. A larger lookahead buffer
     // increases the number of blocks found during an allocation pass. The
     // lookahead buffer is stored as a compact bitmap, so each byte of RAM
     // can track 8 blocks. Must be a multiple of 8.
-    lfs_size_t lookahead_size;
+    lfs2_size_t lookahead_size;
 
     // Optional statically allocated read buffer. Must be cache_size.
-    // By default lfs_malloc is used to allocate this buffer.
+    // By default lfs2_malloc is used to allocate this buffer.
     void *read_buffer;
 
     // Optional statically allocated program buffer. Must be cache_size.
-    // By default lfs_malloc is used to allocate this buffer.
+    // By default lfs2_malloc is used to allocate this buffer.
     void *prog_buffer;
 
     // Optional statically allocated lookahead buffer. Must be lookahead_size
-    // and aligned to a 32-bit boundary. By default lfs_malloc is used to
+    // and aligned to a 32-bit boundary. By default lfs2_malloc is used to
     // allocate this buffer.
     void *lookahead_buffer;
 
     // Optional upper limit on length of file names in bytes. No downside for
     // larger names except the size of the info struct which is controlled by
-    // the LFS_NAME_MAX define. Defaults to LFS_NAME_MAX when zero. Stored in
+    // the LFS2_NAME_MAX define. Defaults to LFS2_NAME_MAX when zero. Stored in
     // superblock and must be respected by other littlefs drivers.
-    lfs_size_t name_max;
+    lfs2_size_t name_max;
 
     // Optional upper limit on files in bytes. No downside for larger files
-    // but must be <= LFS_FILE_MAX. Defaults to LFS_FILE_MAX when zero. Stored
+    // but must be <= LFS2_FILE_MAX. Defaults to LFS2_FILE_MAX when zero. Stored
     // in superblock and must be respected by other littlefs drivers.
-    lfs_size_t file_max;
+    lfs2_size_t file_max;
 
     // Optional upper limit on custom attributes in bytes. No downside for
-    // larger attributes size but must be <= LFS_ATTR_MAX. Defaults to
-    // LFS_ATTR_MAX when zero.
-    lfs_size_t attr_max;
+    // larger attributes size but must be <= LFS2_ATTR_MAX. Defaults to
+    // LFS2_ATTR_MAX when zero.
+    lfs2_size_t attr_max;
+
+    // Optional upper limit on total space given to metadata pairs in bytes. On
+    // devices with large blocks (e.g. 128kB) setting this to a low size (2-8kB)
+    // can help bound the metadata compaction time. Must be <= block_size.
+    // Defaults to block_size when zero.
+    lfs2_size_t metadata_max;
 };
 
 // File info structure
-struct lfs_info {
-    // Type of the file, either LFS_TYPE_REG or LFS_TYPE_DIR
+struct lfs2_info {
+    // Type of the file, either LFS2_TYPE_REG or LFS2_TYPE_DIR
     uint8_t type;
 
     // Size of the file, only valid for REG files. Limited to 32-bits.
-    lfs_size_t size;
+    lfs2_size_t size;
 
     // Name of the file stored as a null-terminated string. Limited to
-    // LFS_NAME_MAX+1, which can be changed by redefining LFS_NAME_MAX to
-    // reduce RAM. LFS_NAME_MAX is stored in superblock and must be
+    // LFS2_NAME_MAX+1, which can be changed by redefining LFS2_NAME_MAX to
+    // reduce RAM. LFS2_NAME_MAX is stored in superblock and must be
     // respected by other littlefs drivers.
-    char name[LFS_NAME_MAX+1];
+    char name[LFS2_NAME_MAX+1];
 };
 
 // Custom attribute structure, used to describe custom attributes
 // committed atomically during file writes.
-struct lfs_attr {
+struct lfs2_attr {
     // 8-bit type of attribute, provided by user and used to
     // identify the attribute
     uint8_t type;
@@ -267,14 +289,14 @@ struct lfs_attr {
     // Pointer to buffer containing the attribute
     void *buffer;
 
-    // Size of attribute in bytes, limited to LFS_ATTR_MAX
-    lfs_size_t size;
+    // Size of attribute in bytes, limited to LFS2_ATTR_MAX
+    lfs2_size_t size;
 };
 
-// Optional configuration provided during lfs_file_opencfg
-struct lfs_file_config {
+// Optional configuration provided during lfs2_file_opencfg
+struct lfs2_file_config {
     // Optional statically allocated file buffer. Must be cache_size.
-    // By default lfs_malloc is used to allocate this buffer.
+    // By default lfs2_malloc is used to allocate this buffer.
     void *buffer;
 
     // Optional list of custom attributes related to the file. If the file
@@ -284,122 +306,122 @@ struct lfs_file_config {
     // write occurs atomically with update to the file's contents.
     //
     // Custom attributes are uniquely identified by an 8-bit type and limited
-    // to LFS_ATTR_MAX bytes. When read, if the stored attribute is smaller
+    // to LFS2_ATTR_MAX bytes. When read, if the stored attribute is smaller
     // than the buffer, it will be padded with zeros. If the stored attribute
     // is larger, then it will be silently truncated. If the attribute is not
     // found, it will be created implicitly.
-    struct lfs_attr *attrs;
+    struct lfs2_attr *attrs;
 
     // Number of custom attributes in the list
-    lfs_size_t attr_count;
+    lfs2_size_t attr_count;
 };
 
 
 /// internal littlefs data structures ///
-typedef struct lfs_cache {
-    lfs_block_t block;
-    lfs_off_t off;
-    lfs_size_t size;
+typedef struct lfs2_cache {
+    lfs2_block_t block;
+    lfs2_off_t off;
+    lfs2_size_t size;
     uint8_t *buffer;
-} lfs_cache_t;
+} lfs2_cache_t;
 
-typedef struct lfs_mdir {
-    lfs_block_t pair[2];
+typedef struct lfs2_mdir {
+    lfs2_block_t pair[2];
     uint32_t rev;
-    lfs_off_t off;
+    lfs2_off_t off;
     uint32_t etag;
     uint16_t count;
     bool erased;
     bool split;
-    bool first;
-    lfs_block_t tail[2];
-} lfs_mdir_t;
+    lfs2_block_t tail[2];
+} lfs2_mdir_t;
 
 // littlefs directory type
-typedef struct lfs_dir {
-    struct lfs_dir *next;
+typedef struct lfs2_dir {
+    struct lfs2_dir *next;
     uint16_t id;
     uint8_t type;
-    lfs_mdir_t m;
+    lfs2_mdir_t m;
 
-    lfs_off_t pos;
-    lfs_block_t head[2];
-} lfs_dir_t;
+    lfs2_off_t pos;
+    lfs2_block_t head[2];
+} lfs2_dir_t;
 
 // littlefs file type
-typedef struct lfs_file {
-    struct lfs_file *next;
+typedef struct lfs2_file {
+    struct lfs2_file *next;
     uint16_t id;
     uint8_t type;
-    lfs_mdir_t m;
+    lfs2_mdir_t m;
 
-    struct lfs_ctz {
-        lfs_block_t head;
-        lfs_size_t size;
+    struct lfs2_ctz {
+        lfs2_block_t head;
+        lfs2_size_t size;
     } ctz;
 
     uint32_t flags;
-    lfs_off_t pos;
-    lfs_block_t block;
-    lfs_off_t off;
-    lfs_cache_t cache;
+    lfs2_off_t pos;
+    lfs2_block_t block;
+    lfs2_off_t off;
+    lfs2_cache_t cache;
 
-    const struct lfs_file_config *cfg;
-} lfs_file_t;
+    const struct lfs2_file_config *cfg;
+} lfs2_file_t;
 
-typedef struct lfs_superblock {
+typedef struct lfs2_superblock {
     uint32_t version;
-    lfs_size_t block_size;
-    lfs_size_t block_count;
-    lfs_size_t name_max;
-    lfs_size_t file_max;
-    lfs_size_t attr_max;
-} lfs_superblock_t;
+    lfs2_size_t block_size;
+    lfs2_size_t block_count;
+    lfs2_size_t name_max;
+    lfs2_size_t file_max;
+    lfs2_size_t attr_max;
+} lfs2_superblock_t;
 
-typedef struct lfs_gstate {
+typedef struct lfs2_gstate {
     uint32_t tag;
-    lfs_block_t pair[2];
-} lfs_gstate_t;
+    lfs2_block_t pair[2];
+} lfs2_gstate_t;
 
 // The littlefs filesystem type
-typedef struct lfs {
-    lfs_cache_t rcache;
-    lfs_cache_t pcache;
+typedef struct lfs2 {
+    lfs2_cache_t rcache;
+    lfs2_cache_t pcache;
 
-    lfs_block_t root[2];
-    struct lfs_mlist {
-        struct lfs_mlist *next;
+    lfs2_block_t root[2];
+    struct lfs2_mlist {
+        struct lfs2_mlist *next;
         uint16_t id;
         uint8_t type;
-        lfs_mdir_t m;
+        lfs2_mdir_t m;
     } *mlist;
     uint32_t seed;
 
-    lfs_gstate_t gstate;
-    lfs_gstate_t gdisk;
-    lfs_gstate_t gdelta;
+    lfs2_gstate_t gstate;
+    lfs2_gstate_t gdisk;
+    lfs2_gstate_t gdelta;
 
-    struct lfs_free {
-        lfs_block_t off;
-        lfs_block_t size;
-        lfs_block_t i;
-        lfs_block_t ack;
+    struct lfs2_free {
+        lfs2_block_t off;
+        lfs2_block_t size;
+        lfs2_block_t i;
+        lfs2_block_t ack;
         uint32_t *buffer;
     } free;
 
-    const struct lfs_config *cfg;
-    lfs_size_t name_max;
-    lfs_size_t file_max;
-    lfs_size_t attr_max;
+    const struct lfs2_config *cfg;
+    lfs2_size_t name_max;
+    lfs2_size_t file_max;
+    lfs2_size_t attr_max;
 
-#ifdef LFS_MIGRATE
-    struct lfs1 *lfs1;
+#ifdef LFS2_MIGRATE
+    struct lfs21 *lfs21;
 #endif
-} lfs_t;
+} lfs2_t;
 
 
 /// Filesystem functions ///
 
+#ifndef LFS2_READONLY
 // Format a block device with the littlefs
 //
 // Requires a littlefs object and config struct. This clobbers the littlefs
@@ -407,77 +429,86 @@ typedef struct lfs {
 // be zeroed for defaults and backwards compatibility.
 //
 // Returns a negative error code on failure.
-int lfs_format(lfs_t *lfs, const struct lfs_config *config);
+int lfs2_format(lfs2_t *lfs2, const struct lfs2_config *config);
+#endif
 
 // Mounts a littlefs
 //
 // Requires a littlefs object and config struct. Multiple filesystems
 // may be mounted simultaneously with multiple littlefs objects. Both
-// lfs and config must be allocated while mounted. The config struct must
+// lfs2 and config must be allocated while mounted. The config struct must
 // be zeroed for defaults and backwards compatibility.
 //
 // Returns a negative error code on failure.
-int lfs_mount(lfs_t *lfs, const struct lfs_config *config);
+int lfs2_mount(lfs2_t *lfs2, const struct lfs2_config *config);
 
 // Unmounts a littlefs
 //
 // Does nothing besides releasing any allocated resources.
 // Returns a negative error code on failure.
-int lfs_unmount(lfs_t *lfs);
+int lfs2_unmount(lfs2_t *lfs2);
 
 /// General operations ///
 
+#ifndef LFS2_READONLY
 // Removes a file or directory
 //
 // If removing a directory, the directory must be empty.
 // Returns a negative error code on failure.
-int lfs_remove(lfs_t *lfs, const char *path);
+int lfs2_remove(lfs2_t *lfs2, const char *path);
+#endif
 
+#ifndef LFS2_READONLY
 // Rename or move a file or directory
 //
 // If the destination exists, it must match the source in type.
 // If the destination is a directory, the directory must be empty.
 //
 // Returns a negative error code on failure.
-int lfs_rename(lfs_t *lfs, const char *oldpath, const char *newpath);
+int lfs2_rename(lfs2_t *lfs2, const char *oldpath, const char *newpath);
+#endif
 
 // Find info about a file or directory
 //
 // Fills out the info structure, based on the specified file or directory.
 // Returns a negative error code on failure.
-int lfs_stat(lfs_t *lfs, const char *path, struct lfs_info *info);
+int lfs2_stat(lfs2_t *lfs2, const char *path, struct lfs2_info *info);
 
 // Get a custom attribute
 //
 // Custom attributes are uniquely identified by an 8-bit type and limited
-// to LFS_ATTR_MAX bytes. When read, if the stored attribute is smaller than
+// to LFS2_ATTR_MAX bytes. When read, if the stored attribute is smaller than
 // the buffer, it will be padded with zeros. If the stored attribute is larger,
 // then it will be silently truncated. If no attribute is found, the error
-// LFS_ERR_NOATTR is returned and the buffer is filled with zeros.
+// LFS2_ERR_NOATTR is returned and the buffer is filled with zeros.
 //
 // Returns the size of the attribute, or a negative error code on failure.
 // Note, the returned size is the size of the attribute on disk, irrespective
 // of the size of the buffer. This can be used to dynamically allocate a buffer
-// or check for existance.
-lfs_ssize_t lfs_getattr(lfs_t *lfs, const char *path,
-        uint8_t type, void *buffer, lfs_size_t size);
+// or check for existence.
+lfs2_ssize_t lfs2_getattr(lfs2_t *lfs2, const char *path,
+        uint8_t type, void *buffer, lfs2_size_t size);
 
+#ifndef LFS2_READONLY
 // Set custom attributes
 //
 // Custom attributes are uniquely identified by an 8-bit type and limited
-// to LFS_ATTR_MAX bytes. If an attribute is not found, it will be
+// to LFS2_ATTR_MAX bytes. If an attribute is not found, it will be
 // implicitly created.
 //
 // Returns a negative error code on failure.
-int lfs_setattr(lfs_t *lfs, const char *path,
-        uint8_t type, const void *buffer, lfs_size_t size);
+int lfs2_setattr(lfs2_t *lfs2, const char *path,
+        uint8_t type, const void *buffer, lfs2_size_t size);
+#endif
 
+#ifndef LFS2_READONLY
 // Removes a custom attribute
 //
 // If an attribute is not found, nothing happens.
 //
 // Returns a negative error code on failure.
-int lfs_removeattr(lfs_t *lfs, const char *path, uint8_t type);
+int lfs2_removeattr(lfs2_t *lfs2, const char *path, uint8_t type);
+#endif
 
 
 /// File operations ///
@@ -485,25 +516,25 @@ int lfs_removeattr(lfs_t *lfs, const char *path, uint8_t type);
 // Open a file
 //
 // The mode that the file is opened in is determined by the flags, which
-// are values from the enum lfs_open_flags that are bitwise-ored together.
+// are values from the enum lfs2_open_flags that are bitwise-ored together.
 //
 // Returns a negative error code on failure.
-int lfs_file_open(lfs_t *lfs, lfs_file_t *file,
+int lfs2_file_open(lfs2_t *lfs2, lfs2_file_t *file,
         const char *path, int flags);
 
 // Open a file with extra configuration
 //
 // The mode that the file is opened in is determined by the flags, which
-// are values from the enum lfs_open_flags that are bitwise-ored together.
+// are values from the enum lfs2_open_flags that are bitwise-ored together.
 //
 // The config struct provides additional config options per file as described
 // above. The config struct must be allocated while the file is open, and the
 // config struct must be zeroed for defaults and backwards compatibility.
 //
 // Returns a negative error code on failure.
-int lfs_file_opencfg(lfs_t *lfs, lfs_file_t *file,
+int lfs2_file_opencfg(lfs2_t *lfs2, lfs2_file_t *file,
         const char *path, int flags,
-        const struct lfs_file_config *config);
+        const struct lfs2_file_config *config);
 
 // Close a file
 //
@@ -511,86 +542,92 @@ int lfs_file_opencfg(lfs_t *lfs, lfs_file_t *file,
 // sync had been called and releases any allocated resources.
 //
 // Returns a negative error code on failure.
-int lfs_file_close(lfs_t *lfs, lfs_file_t *file);
+int lfs2_file_close(lfs2_t *lfs2, lfs2_file_t *file);
 
 // Synchronize a file on storage
 //
 // Any pending writes are written out to storage.
 // Returns a negative error code on failure.
-int lfs_file_sync(lfs_t *lfs, lfs_file_t *file);
+int lfs2_file_sync(lfs2_t *lfs2, lfs2_file_t *file);
 
 // Read data from file
 //
 // Takes a buffer and size indicating where to store the read data.
 // Returns the number of bytes read, or a negative error code on failure.
-lfs_ssize_t lfs_file_read(lfs_t *lfs, lfs_file_t *file,
-        void *buffer, lfs_size_t size);
+lfs2_ssize_t lfs2_file_read(lfs2_t *lfs2, lfs2_file_t *file,
+        void *buffer, lfs2_size_t size);
 
+#ifndef LFS2_READONLY
 // Write data to file
 //
 // Takes a buffer and size indicating the data to write. The file will not
 // actually be updated on the storage until either sync or close is called.
 //
 // Returns the number of bytes written, or a negative error code on failure.
-lfs_ssize_t lfs_file_write(lfs_t *lfs, lfs_file_t *file,
-        const void *buffer, lfs_size_t size);
+lfs2_ssize_t lfs2_file_write(lfs2_t *lfs2, lfs2_file_t *file,
+        const void *buffer, lfs2_size_t size);
+#endif
 
 // Change the position of the file
 //
 // The change in position is determined by the offset and whence flag.
 // Returns the new position of the file, or a negative error code on failure.
-lfs_soff_t lfs_file_seek(lfs_t *lfs, lfs_file_t *file,
-        lfs_soff_t off, int whence);
+lfs2_soff_t lfs2_file_seek(lfs2_t *lfs2, lfs2_file_t *file,
+        lfs2_soff_t off, int whence);
 
+#ifndef LFS2_READONLY
 // Truncates the size of the file to the specified size
 //
 // Returns a negative error code on failure.
-int lfs_file_truncate(lfs_t *lfs, lfs_file_t *file, lfs_off_t size);
+int lfs2_file_truncate(lfs2_t *lfs2, lfs2_file_t *file, lfs2_off_t size);
+#endif
 
 // Return the position of the file
 //
-// Equivalent to lfs_file_seek(lfs, file, 0, LFS_SEEK_CUR)
+// Equivalent to lfs2_file_seek(lfs2, file, 0, LFS2_SEEK_CUR)
 // Returns the position of the file, or a negative error code on failure.
-lfs_soff_t lfs_file_tell(lfs_t *lfs, lfs_file_t *file);
+lfs2_soff_t lfs2_file_tell(lfs2_t *lfs2, lfs2_file_t *file);
 
 // Change the position of the file to the beginning of the file
 //
-// Equivalent to lfs_file_seek(lfs, file, 0, LFS_SEEK_SET)
+// Equivalent to lfs2_file_seek(lfs2, file, 0, LFS2_SEEK_SET)
 // Returns a negative error code on failure.
-int lfs_file_rewind(lfs_t *lfs, lfs_file_t *file);
+int lfs2_file_rewind(lfs2_t *lfs2, lfs2_file_t *file);
 
 // Return the size of the file
 //
-// Similar to lfs_file_seek(lfs, file, 0, LFS_SEEK_END)
+// Similar to lfs2_file_seek(lfs2, file, 0, LFS2_SEEK_END)
 // Returns the size of the file, or a negative error code on failure.
-lfs_soff_t lfs_file_size(lfs_t *lfs, lfs_file_t *file);
+lfs2_soff_t lfs2_file_size(lfs2_t *lfs2, lfs2_file_t *file);
 
 
 /// Directory operations ///
 
+#ifndef LFS2_READONLY
 // Create a directory
 //
 // Returns a negative error code on failure.
-int lfs_mkdir(lfs_t *lfs, const char *path);
+int lfs2_mkdir(lfs2_t *lfs2, const char *path);
+#endif
 
 // Open a directory
 //
 // Once open a directory can be used with read to iterate over files.
 // Returns a negative error code on failure.
-int lfs_dir_open(lfs_t *lfs, lfs_dir_t *dir, const char *path);
+int lfs2_dir_open(lfs2_t *lfs2, lfs2_dir_t *dir, const char *path);
 
 // Close a directory
 //
 // Releases any allocated resources.
 // Returns a negative error code on failure.
-int lfs_dir_close(lfs_t *lfs, lfs_dir_t *dir);
+int lfs2_dir_close(lfs2_t *lfs2, lfs2_dir_t *dir);
 
 // Read an entry in the directory
 //
 // Fills out the info structure, based on the specified file or directory.
 // Returns a positive value on success, 0 at the end of directory,
 // or a negative error code on failure.
-int lfs_dir_read(lfs_t *lfs, lfs_dir_t *dir, struct lfs_info *info);
+int lfs2_dir_read(lfs2_t *lfs2, lfs2_dir_t *dir, struct lfs2_info *info);
 
 // Change the position of the directory
 //
@@ -598,7 +635,7 @@ int lfs_dir_read(lfs_t *lfs, lfs_dir_t *dir, struct lfs_info *info);
 // an absolute offset in the directory seek.
 //
 // Returns a negative error code on failure.
-int lfs_dir_seek(lfs_t *lfs, lfs_dir_t *dir, lfs_off_t off);
+int lfs2_dir_seek(lfs2_t *lfs2, lfs2_dir_t *dir, lfs2_off_t off);
 
 // Return the position of the directory
 //
@@ -606,12 +643,12 @@ int lfs_dir_seek(lfs_t *lfs, lfs_dir_t *dir, lfs_off_t off);
 // sense, but does indicate the current position in the directory iteration.
 //
 // Returns the position of the directory, or a negative error code on failure.
-lfs_soff_t lfs_dir_tell(lfs_t *lfs, lfs_dir_t *dir);
+lfs2_soff_t lfs2_dir_tell(lfs2_t *lfs2, lfs2_dir_t *dir);
 
 // Change the position of the directory to the beginning of the directory
 //
 // Returns a negative error code on failure.
-int lfs_dir_rewind(lfs_t *lfs, lfs_dir_t *dir);
+int lfs2_dir_rewind(lfs2_t *lfs2, lfs2_dir_t *dir);
 
 
 /// Filesystem-level filesystem operations
@@ -622,7 +659,7 @@ int lfs_dir_rewind(lfs_t *lfs, lfs_dir_t *dir);
 // size may be larger than the filesystem actually is.
 //
 // Returns the number of allocated blocks, or a negative error code on failure.
-lfs_ssize_t lfs_fs_size(lfs_t *lfs);
+lfs2_ssize_t lfs2_fs_size(lfs2_t *lfs2);
 
 // Traverse through all blocks in use by the filesystem
 //
@@ -631,12 +668,13 @@ lfs_ssize_t lfs_fs_size(lfs_t *lfs);
 // blocks are in use or how much of the storage is available.
 //
 // Returns a negative error code on failure.
-int lfs_fs_traverse(lfs_t *lfs, int (*cb)(void*, lfs_block_t), void *data);
+int lfs2_fs_traverse(lfs2_t *lfs2, int (*cb)(void*, lfs2_block_t), void *data);
 
-#ifdef LFS_MIGRATE
+#ifndef LFS2_READONLY
+#ifdef LFS2_MIGRATE
 // Attempts to migrate a previous version of littlefs
 //
-// Behaves similarly to the lfs_format function. Attempts to mount
+// Behaves similarly to the lfs2_format function. Attempts to mount
 // the previous version of littlefs and update the filesystem so it can be
 // mounted with the current version of littlefs.
 //
@@ -645,7 +683,8 @@ int lfs_fs_traverse(lfs_t *lfs, int (*cb)(void*, lfs_block_t), void *data);
 // be zeroed for defaults and backwards compatibility.
 //
 // Returns a negative error code on failure.
-int lfs_migrate(lfs_t *lfs, const struct lfs_config *cfg);
+int lfs2_migrate(lfs2_t *lfs2, const struct lfs2_config *cfg);
+#endif
 #endif
 
 

lfs2_util.c

@@ -1,17 +1,17 @@
 /*
- * lfs util functions
+ * lfs2 util functions
  *
  * Copyright (c) 2017, Arm Limited. All rights reserved.
  * SPDX-License-Identifier: BSD-3-Clause
  */
-#include "lfs_util.h"
+#include "lfs2_util.h"
 
 // Only compile if user does not provide custom config
-#ifndef LFS_CONFIG
+#ifndef LFS2_CONFIG
 
 
 // Software CRC implementation with small lookup table
-uint32_t lfs_crc(uint32_t crc, const void *buffer, size_t size) {
+uint32_t lfs2_crc(uint32_t crc, const void *buffer, size_t size) {
     static const uint32_t rtable[16] = {
         0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
         0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,

lfs2_util.h

@@ -1,22 +1,22 @@
 /*
- * lfs utility functions
+ * lfs2 utility functions
  *
  * Copyright (c) 2017, Arm Limited. All rights reserved.
  * SPDX-License-Identifier: BSD-3-Clause
  */
-#ifndef LFS_UTIL_H
-#define LFS_UTIL_H
+#ifndef LFS2_UTIL_H
+#define LFS2_UTIL_H
 
-// Users can override lfs_util.h with their own configuration by defining
-// LFS_CONFIG as a header file to include (-DLFS_CONFIG=lfs_config.h).
+// Users can override lfs2_util.h with their own configuration by defining
+// LFS2_CONFIG as a header file to include (-DLFS2_CONFIG=lfs2_config.h).
 //
-// If LFS_CONFIG is used, none of the default utils will be emitted and must be
-// provided by the config file. To start, I would suggest copying lfs_util.h
+// If LFS2_CONFIG is used, none of the default utils will be emitted and must be
+// provided by the config file. To start, I would suggest copying lfs2_util.h
 // and modifying as needed.
-#ifdef LFS_CONFIG
-#define LFS_STRINGIZE(x) LFS_STRINGIZE2(x)
-#define LFS_STRINGIZE2(x) #x
-#include LFS_STRINGIZE(LFS_CONFIG)
+#ifdef LFS2_CONFIG
+#define LFS2_STRINGIZE(x) LFS2_STRINGIZE2(x)
+#define LFS2_STRINGIZE2(x) #x
+#include LFS2_STRINGIZE(LFS2_CONFIG)
 #else
 
 // System includes
@@ -25,16 +25,16 @@
 #include <string.h>
 #include <inttypes.h>
 
-#ifndef LFS_NO_MALLOC
+#ifndef LFS2_NO_MALLOC
 #include <stdlib.h>
 #endif
-#ifndef LFS_NO_ASSERT
+#ifndef LFS2_NO_ASSERT
 #include <assert.h>
 #endif
-#if !defined(LFS_NO_DEBUG) || \
-        !defined(LFS_NO_WARN) || \
-        !defined(LFS_NO_ERROR) || \
-        defined(LFS_YES_TRACE)
+#if !defined(LFS2_NO_DEBUG) || \
+        !defined(LFS2_NO_WARN) || \
+        !defined(LFS2_NO_ERROR) || \
+        defined(LFS2_YES_TRACE)
 #include <stdio.h>
 #endif
 
@@ -49,67 +49,81 @@ extern "C"
 // code footprint
 
 // Logging functions
-#ifdef LFS_YES_TRACE
-#define LFS_TRACE(fmt, ...) \
-    printf("%s:%d:trace: " fmt "\n", __FILE__, __LINE__, __VA_ARGS__)
+#ifndef LFS2_TRACE
+#ifdef LFS2_YES_TRACE
+#define LFS2_TRACE_(fmt, ...) \
+    printf("%s:%d:trace: " fmt "%s\n", __FILE__, __LINE__, __VA_ARGS__)
+#define LFS2_TRACE(...) LFS2_TRACE_(__VA_ARGS__, "")
 #else
-#define LFS_TRACE(fmt, ...)
+#define LFS2_TRACE(...)
+#endif
 #endif
 
-#ifndef LFS_NO_DEBUG
-#define LFS_DEBUG(fmt, ...) \
-    printf("%s:%d:debug: " fmt "\n", __FILE__, __LINE__, __VA_ARGS__)
+#ifndef LFS2_DEBUG
+#ifndef LFS2_NO_DEBUG
+#define LFS2_DEBUG_(fmt, ...) \
+    printf("%s:%d:debug: " fmt "%s\n", __FILE__, __LINE__, __VA_ARGS__)
+#define LFS2_DEBUG(...) LFS2_DEBUG_(__VA_ARGS__, "")
 #else
-#define LFS_DEBUG(fmt, ...)
+#define LFS2_DEBUG(...)
+#endif
 #endif
 
-#ifndef LFS_NO_WARN
-#define LFS_WARN(fmt, ...) \
-    printf("%s:%d:warn: " fmt "\n", __FILE__, __LINE__, __VA_ARGS__)
+#ifndef LFS2_WARN
+#ifndef LFS2_NO_WARN
+#define LFS2_WARN_(fmt, ...) \
+    printf("%s:%d:warn: " fmt "%s\n", __FILE__, __LINE__, __VA_ARGS__)
+#define LFS2_WARN(...) LFS2_WARN_(__VA_ARGS__, "")
 #else
-#define LFS_WARN(fmt, ...)
+#define LFS2_WARN(...)
+#endif
 #endif
 
-#ifndef LFS_NO_ERROR
-#define LFS_ERROR(fmt, ...) \
-    printf("%s:%d:error: " fmt "\n", __FILE__, __LINE__, __VA_ARGS__)
+#ifndef LFS2_ERROR
+#ifndef LFS2_NO_ERROR
+#define LFS2_ERROR_(fmt, ...) \
+    printf("%s:%d:error: " fmt "%s\n", __FILE__, __LINE__, __VA_ARGS__)
+#define LFS2_ERROR(...) LFS2_ERROR_(__VA_ARGS__, "")
 #else
-#define LFS_ERROR(fmt, ...)
+#define LFS2_ERROR(...)
+#endif
 #endif
 
 // Runtime assertions
-#ifndef LFS_NO_ASSERT
-#define LFS_ASSERT(test) assert(test)
+#ifndef LFS2_ASSERT
+#ifndef LFS2_NO_ASSERT
+#define LFS2_ASSERT(test) assert(test)
 #else
-#define LFS_ASSERT(test)
+#define LFS2_ASSERT(test)
+#endif
 #endif
 
 
 // Builtin functions, these may be replaced by more efficient
-// toolchain-specific implementations. LFS_NO_INTRINSICS falls back to a more
+// toolchain-specific implementations. LFS2_NO_INTRINSICS falls back to a more
 // expensive basic C implementation for debugging purposes
 
 // Min/max functions for unsigned 32-bit numbers
-static inline uint32_t lfs_max(uint32_t a, uint32_t b) {
+static inline uint32_t lfs2_max(uint32_t a, uint32_t b) {
     return (a > b) ? a : b;
 }
 
-static inline uint32_t lfs_min(uint32_t a, uint32_t b) {
+static inline uint32_t lfs2_min(uint32_t a, uint32_t b) {
     return (a < b) ? a : b;
 }
 
 // Align to nearest multiple of a size
-static inline uint32_t lfs_aligndown(uint32_t a, uint32_t alignment) {
+static inline uint32_t lfs2_aligndown(uint32_t a, uint32_t alignment) {
     return a - (a % alignment);
 }
 
-static inline uint32_t lfs_alignup(uint32_t a, uint32_t alignment) {
-    return lfs_aligndown(a + alignment-1, alignment);
+static inline uint32_t lfs2_alignup(uint32_t a, uint32_t alignment) {
+    return lfs2_aligndown(a + alignment-1, alignment);
 }
 
-// Find the next smallest power of 2 less than or equal to a
-static inline uint32_t lfs_npw2(uint32_t a) {
-#if !defined(LFS_NO_INTRINSICS) && (defined(__GNUC__) || defined(__CC_ARM))
+// Find the smallest power of 2 greater than or equal to a
+static inline uint32_t lfs2_npw2(uint32_t a) {
+#if !defined(LFS2_NO_INTRINSICS) && (defined(__GNUC__) || defined(__CC_ARM))
     return 32 - __builtin_clz(a-1);
 #else
     uint32_t r = 0;
@@ -124,18 +138,18 @@ static inline uint32_t lfs_npw2(uint32_t a) {
 }
 
 // Count the number of trailing binary zeros in a
-// lfs_ctz(0) may be undefined
-static inline uint32_t lfs_ctz(uint32_t a) {
-#if !defined(LFS_NO_INTRINSICS) && defined(__GNUC__)
+// lfs2_ctz(0) may be undefined
+static inline uint32_t lfs2_ctz(uint32_t a) {
+#if !defined(LFS2_NO_INTRINSICS) && defined(__GNUC__)
     return __builtin_ctz(a);
 #else
-    return lfs_npw2((a & -a) + 1) - 1;
+    return lfs2_npw2((a & -a) + 1) - 1;
 #endif
 }
 
 // Count the number of binary ones in a
-static inline uint32_t lfs_popc(uint32_t a) {
-#if !defined(LFS_NO_INTRINSICS) && (defined(__GNUC__) || defined(__CC_ARM))
+static inline uint32_t lfs2_popc(uint32_t a) {
+#if !defined(LFS2_NO_INTRINSICS) && (defined(__GNUC__) || defined(__CC_ARM))
     return __builtin_popcount(a);
 #else
     a = a - ((a >> 1) & 0x55555555);
@@ -146,18 +160,18 @@ static inline uint32_t lfs_popc(uint32_t a) {
 
 // Find the sequence comparison of a and b, this is the distance
 // between a and b ignoring overflow
-static inline int lfs_scmp(uint32_t a, uint32_t b) {
+static inline int lfs2_scmp(uint32_t a, uint32_t b) {
     return (int)(unsigned)(a - b);
 }
 
 // Convert between 32-bit little-endian and native order
-static inline uint32_t lfs_fromle32(uint32_t a) {
-#if !defined(LFS_NO_INTRINSICS) && ( \
+static inline uint32_t lfs2_fromle32(uint32_t a) {
+#if !defined(LFS2_NO_INTRINSICS) && ( \
     (defined(  BYTE_ORDER  ) && defined(  ORDER_LITTLE_ENDIAN  ) &&   BYTE_ORDER   ==   ORDER_LITTLE_ENDIAN  ) || \
     (defined(__BYTE_ORDER  ) && defined(__ORDER_LITTLE_ENDIAN  ) && __BYTE_ORDER   == __ORDER_LITTLE_ENDIAN  ) || \
     (defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__))
     return a;
-#elif !defined(LFS_NO_INTRINSICS) && ( \
+#elif !defined(LFS2_NO_INTRINSICS) && ( \
     (defined(  BYTE_ORDER  ) && defined(  ORDER_BIG_ENDIAN  ) &&   BYTE_ORDER   ==   ORDER_BIG_ENDIAN  ) || \
     (defined(__BYTE_ORDER  ) && defined(__ORDER_BIG_ENDIAN  ) && __BYTE_ORDER   == __ORDER_BIG_ENDIAN  ) || \
     (defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__))
@@ -170,18 +184,18 @@ static inline uint32_t lfs_fromle32(uint32_t a) {
 #endif
 }
 
-static inline uint32_t lfs_tole32(uint32_t a) {
-    return lfs_fromle32(a);
+static inline uint32_t lfs2_tole32(uint32_t a) {
+    return lfs2_fromle32(a);
 }
 
 // Convert between 32-bit big-endian and native order
-static inline uint32_t lfs_frombe32(uint32_t a) {
-#if !defined(LFS_NO_INTRINSICS) && ( \
+static inline uint32_t lfs2_frombe32(uint32_t a) {
+#if !defined(LFS2_NO_INTRINSICS) && ( \
     (defined(  BYTE_ORDER  ) && defined(  ORDER_LITTLE_ENDIAN  ) &&   BYTE_ORDER   ==   ORDER_LITTLE_ENDIAN  ) || \
     (defined(__BYTE_ORDER  ) && defined(__ORDER_LITTLE_ENDIAN  ) && __BYTE_ORDER   == __ORDER_LITTLE_ENDIAN  ) || \
     (defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__))
     return __builtin_bswap32(a);
-#elif !defined(LFS_NO_INTRINSICS) && ( \
+#elif !defined(LFS2_NO_INTRINSICS) && ( \
     (defined(  BYTE_ORDER  ) && defined(  ORDER_BIG_ENDIAN  ) &&   BYTE_ORDER   ==   ORDER_BIG_ENDIAN  ) || \
     (defined(__BYTE_ORDER  ) && defined(__ORDER_BIG_ENDIAN  ) && __BYTE_ORDER   == __ORDER_BIG_ENDIAN  ) || \
     (defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__))
@@ -194,17 +208,17 @@ static inline uint32_t lfs_frombe32(uint32_t a) {
 #endif
 }
 
-static inline uint32_t lfs_tobe32(uint32_t a) {
-    return lfs_frombe32(a);
+static inline uint32_t lfs2_tobe32(uint32_t a) {
+    return lfs2_frombe32(a);
 }
 
 // Calculate CRC-32 with polynomial = 0x04c11db7
-uint32_t lfs_crc(uint32_t crc, const void *buffer, size_t size);
+uint32_t lfs2_crc(uint32_t crc, const void *buffer, size_t size);
 
 // Allocate memory, only used if buffers are not provided to littlefs
 // Note, memory must be 64-bit aligned
-static inline void *lfs_malloc(size_t size) {
-#ifndef LFS_NO_MALLOC
+static inline void *lfs2_malloc(size_t size) {
+#ifndef LFS2_NO_MALLOC
     return malloc(size);
 #else
     (void)size;
@@ -213,8 +227,8 @@ static inline void *lfs_malloc(size_t size) {
 }
 
 // Deallocate memory, only used if buffers are not provided to littlefs
-static inline void lfs_free(void *p) {
-#ifndef LFS_NO_MALLOC
+static inline void lfs2_free(void *p) {
+#ifndef LFS2_NO_MALLOC
     free(p);
 #else
     (void)p;

scripts/code.py

@@ -0,0 +1,214 @@
+#!/usr/bin/env python3
+#
+# Script to find code size at the function level. Basically just a bit wrapper
+# around nm with some extra conveniences for comparing builds. Heavily inspired
+# by Linux's Bloat-O-Meter.
+#
+
+import os
+import glob
+import itertools as it
+import subprocess as sp
+import shlex
+import re
+import csv
+import collections as co
+
+
+OBJ_PATHS = ['*.o', 'bd/*.o']
+
+def collect(paths, **args):
+    results = co.defaultdict(lambda: 0)
+    pattern = re.compile(
+        '^(?P<size>[0-9a-fA-F]+)' +
+        ' (?P<type>[%s])' % re.escape(args['type']) +
+        ' (?P<func>.+?)$')
+    for path in paths:
+        # note nm-tool may contain extra args
+        cmd = args['nm_tool'] + ['--size-sort', path]
+        if args.get('verbose'):
+            print(' '.join(shlex.quote(c) for c in cmd))
+        proc = sp.Popen(cmd,
+            stdout=sp.PIPE,
+            stderr=sp.PIPE if not args.get('verbose') else None,
+            universal_newlines=True)
+        for line in proc.stdout:
+            m = pattern.match(line)
+            if m:
+                results[(path, m.group('func'))] += int(m.group('size'), 16)
+        proc.wait()
+        if proc.returncode != 0:
+            if not args.get('verbose'):
+                for line in proc.stderr:
+                    sys.stdout.write(line)
+            sys.exit(-1)
+
+    flat_results = []
+    for (file, func), size in results.items():
+        # map to source files
+        if args.get('build_dir'):
+            file = re.sub('%s/*' % re.escape(args['build_dir']), '', file)
+        # discard internal functions
+        if func.startswith('__'):
+            continue
+        # discard .8449 suffixes created by optimizer
+        func = re.sub('\.[0-9]+', '', func)
+        flat_results.append((file, func, size))
+
+    return flat_results
+
+def main(**args):
+    # find sizes
+    if not args.get('use', None):
+        # find .o files
+        paths = []
+        for path in args['obj_paths']:
+            if os.path.isdir(path):
+                path = path + '/*.o'
+
+            for path in glob.glob(path):
+                paths.append(path)
+
+        if not paths:
+            print('no .obj files found in %r?' % args['obj_paths'])
+            sys.exit(-1)
+
+        results = collect(paths, **args)
+    else:
+        with open(args['use']) as f:
+            r = csv.DictReader(f)
+            results = [
+                (   result['file'],
+                    result['function'],
+                    int(result['size']))
+                for result in r]
+
+    total = 0
+    for _, _, size in results:
+        total += size
+
+    # find previous results?
+    if args.get('diff'):
+        with open(args['diff']) as f:
+            r = csv.DictReader(f)
+            prev_results = [
+                (   result['file'],
+                    result['function'],
+                    int(result['size']))
+                for result in r]
+
+        prev_total = 0
+        for _, _, size in prev_results:
+            prev_total += size
+
+    # write results to CSV
+    if args.get('output'):
+        with open(args['output'], 'w') as f:
+            w = csv.writer(f)
+            w.writerow(['file', 'function', 'size'])
+            for file, func, size in sorted(results):
+                w.writerow((file, func, size))
+
+    # print results
+    def dedup_entries(results, by='function'):
+        entries = co.defaultdict(lambda: 0)
+        for file, func, size in results:
+            entry = (file if by == 'file' else func)
+            entries[entry] += size
+        return entries
+
+    def diff_entries(olds, news):
+        diff = co.defaultdict(lambda: (0, 0, 0, 0))
+        for name, new in news.items():
+            diff[name] = (0, new, new, 1.0)
+        for name, old in olds.items():
+            _, new, _, _ = diff[name]
+            diff[name] = (old, new, new-old, (new-old)/old if old else 1.0)
+        return diff
+
+    def print_header(by=''):
+        if not args.get('diff'):
+            print('%-36s %7s' % (by, 'size'))
+        else:
+            print('%-36s %7s %7s %7s' % (by, 'old', 'new', 'diff'))
+
+    def print_entries(by='function'):
+        entries = dedup_entries(results, by=by)
+
+        if not args.get('diff'):
+            print_header(by=by)
+            for name, size in sorted(entries.items()):
+                print("%-36s %7d" % (name, size))
+        else:
+            prev_entries = dedup_entries(prev_results, by=by)
+            diff = diff_entries(prev_entries, entries)
+            print_header(by='%s (%d added, %d removed)' % (by,
+                sum(1 for old, _, _, _ in diff.values() if not old),
+                sum(1 for _, new, _, _ in diff.values() if not new)))
+            for name, (old, new, diff, ratio) in sorted(diff.items(),
+                    key=lambda x: (-x[1][3], x)):
+                if ratio or args.get('all'):
+                    print("%-36s %7s %7s %+7d%s" % (name,
+                        old or "-",
+                        new or "-",
+                        diff,
+                        ' (%+.1f%%)' % (100*ratio) if ratio else ''))
+
+    def print_totals():
+        if not args.get('diff'):
+            print("%-36s %7d" % ('TOTAL', total))
+        else:
+            ratio = (total-prev_total)/prev_total if prev_total else 1.0
+            print("%-36s %7s %7s %+7d%s" % (
+                'TOTAL',
+                prev_total if prev_total else '-',
+                total if total else '-',
+                total-prev_total,
+                ' (%+.1f%%)' % (100*ratio) if ratio else ''))
+
+    if args.get('quiet'):
+        pass
+    elif args.get('summary'):
+        print_header()
+        print_totals()
+    elif args.get('files'):
+        print_entries(by='file')
+        print_totals()
+    else:
+        print_entries(by='function')
+        print_totals()
+
+if __name__ == "__main__":
+    import argparse
+    import sys
+    parser = argparse.ArgumentParser(
+        description="Find code size at the function level.")
+    parser.add_argument('obj_paths', nargs='*', default=OBJ_PATHS,
+        help="Description of where to find *.o files. May be a directory \
+            or a list of paths. Defaults to %r." % OBJ_PATHS)
+    parser.add_argument('-v', '--verbose', action='store_true',
+        help="Output commands that run behind the scenes.")
+    parser.add_argument('-o', '--output',
+        help="Specify CSV file to store results.")
+    parser.add_argument('-u', '--use',
+        help="Don't compile and find code sizes, instead use this CSV file.")
+    parser.add_argument('-d', '--diff',
+        help="Specify CSV file to diff code size against.")
+    parser.add_argument('-a', '--all', action='store_true',
+        help="Show all functions, not just the ones that changed.")
+    parser.add_argument('--files', action='store_true',
+        help="Show file-level code sizes. Note this does not include padding! "
+            "So sizes may differ from other tools.")
+    parser.add_argument('-s', '--summary', action='store_true',
+        help="Only show the total code size.")
+    parser.add_argument('-q', '--quiet', action='store_true',
+        help="Don't show anything, useful with -o.")
+    parser.add_argument('--type', default='tTrRdDbB',
+        help="Type of symbols to report, this uses the same single-character "
+            "type-names emitted by nm. Defaults to %(default)r.")
+    parser.add_argument('--nm-tool', default=['nm'], type=lambda x: x.split(),
+        help="Path to the nm tool to use.")
+    parser.add_argument('--build-dir',
+        help="Specify the relative build directory. Used to map object files \
+            to the correct source files.")
+    sys.exit(main(**vars(parser.parse_args())))

scripts/coverage.py

@@ -0,0 +1,254 @@
+#!/usr/bin/env python3
+#
+# Parse and report coverage info from .info files generated by lcov
+#
+import os
+import glob
+import csv
+import re
+import collections as co
+import bisect as b
+
+
+INFO_PATHS = ['tests/*.toml.info']
+
+def collect(paths, **args):
+    file = None
+    funcs = []
+    lines = co.defaultdict(lambda: 0)
+    pattern = re.compile(
+        '^(?P<file>SF:/?(?P<file_name>.*))$'
+        '|^(?P<func>FN:(?P<func_lineno>[0-9]*),(?P<func_name>.*))$'
+        '|^(?P<line>DA:(?P<line_lineno>[0-9]*),(?P<line_hits>[0-9]*))$')
+    for path in paths:
+        with open(path) as f:
+            for line in f:
+                m = pattern.match(line)
+                if m and m.group('file'):
+                    file = m.group('file_name')
+                elif m and file and m.group('func'):
+                    funcs.append((file, int(m.group('func_lineno')),
+                        m.group('func_name')))
+                elif m and file and m.group('line'):
+                    lines[(file, int(m.group('line_lineno')))] += (
+                        int(m.group('line_hits')))
+
+    # map line numbers to functions
+    funcs.sort()
+    def func_from_lineno(file, lineno):
+        i = b.bisect(funcs, (file, lineno))
+        if i and funcs[i-1][0] == file:
+            return funcs[i-1][2]
+        else:
+            return None
+
+    # reduce to function info
+    reduced_funcs = co.defaultdict(lambda: (0, 0))
+    for (file, line_lineno), line_hits in lines.items():
+        func = func_from_lineno(file, line_lineno)
+        if not func:
+            continue
+        hits, count = reduced_funcs[(file, func)]
+        reduced_funcs[(file, func)] = (hits + (line_hits > 0), count + 1)
+
+    results = []
+    for (file, func), (hits, count) in reduced_funcs.items():
+        # discard internal/testing functions (test_* injected with
+        # internal testing)
+        if func.startswith('__') or func.startswith('test_'):
+            continue
+        # discard .8449 suffixes created by optimizer
+        func = re.sub('\.[0-9]+', '', func)
+        results.append((file, func, hits, count))
+
+    return results
+
+
+def main(**args):
+    # find coverage
+    if not args.get('use'):
+        # find *.info files
+        paths = []
+        for path in args['info_paths']:
+            if os.path.isdir(path):
+                path = path + '/*.gcov'
+
+            for path in glob.glob(path):
+                paths.append(path)
+
+        if not paths:
+            print('no .info files found in %r?' % args['info_paths'])
+            sys.exit(-1)
+
+        results = collect(paths, **args)
+    else:
+        with open(args['use']) as f:
+            r = csv.DictReader(f)
+            results = [
+                (   result['file'],
+                    result['function'],
+                    int(result['hits']),
+                    int(result['count']))
+                for result in r]
+
+    total_hits, total_count = 0, 0
+    for _, _, hits, count in results:
+        total_hits += hits
+        total_count += count
+
+    # find previous results?
+    if args.get('diff'):
+        with open(args['diff']) as f:
+            r = csv.DictReader(f)
+            prev_results = [
+                (   result['file'],
+                    result['function'],
+                    int(result['hits']),
+                    int(result['count']))
+                for result in r]
+
+        prev_total_hits, prev_total_count = 0, 0
+        for _, _, hits, count in prev_results:
+            prev_total_hits += hits
+            prev_total_count += count
+
+    # write results to CSV
+    if args.get('output'):
+        with open(args['output'], 'w') as f:
+            w = csv.writer(f)
+            w.writerow(['file', 'function', 'hits', 'count'])
+            for file, func, hits, count in sorted(results):
+                w.writerow((file, func, hits, count))
+
+    # print results
+    def dedup_entries(results, by='function'):
+        entries = co.defaultdict(lambda: (0, 0))
+        for file, func, hits, count in results:
+            entry = (file if by == 'file' else func)
+            entry_hits, entry_count = entries[entry]
+            entries[entry] = (entry_hits + hits, entry_count + count)
+        return entries
+
+    def diff_entries(olds, news):
+        diff = co.defaultdict(lambda: (0, 0, 0, 0, 0, 0, 0))
+        for name, (new_hits, new_count) in news.items():
+            diff[name] = (
+                0, 0,
+                new_hits, new_count,
+                new_hits, new_count,
+                (new_hits/new_count if new_count else 1.0) - 1.0)
+        for name, (old_hits, old_count) in olds.items():
+            _, _, new_hits, new_count, _, _, _ = diff[name]
+            diff[name] = (
+                old_hits, old_count,
+                new_hits, new_count,
+                new_hits-old_hits, new_count-old_count,
+                ((new_hits/new_count if new_count else 1.0)
+                    - (old_hits/old_count if old_count else 1.0)))
+        return diff
+
+    def print_header(by=''):
+        if not args.get('diff'):
+            print('%-36s %19s' % (by, 'hits/line'))
+        else:
+            print('%-36s %19s %19s %11s' % (by, 'old', 'new', 'diff'))
+
+    def print_entries(by='function'):
+        entries = dedup_entries(results, by=by)
+
+        if not args.get('diff'):
+            print_header(by=by)
+            for name, (hits, count) in sorted(entries.items()):
+                print("%-36s %11s %7s" % (name,
+                    '%d/%d' % (hits, count)
+                        if count else '-',
+                    '%.1f%%' % (100*hits/count)
+                        if count else '-'))
+        else:
+            prev_entries = dedup_entries(prev_results, by=by)
+            diff = diff_entries(prev_entries, entries)
+            print_header(by='%s (%d added, %d removed)' % (by,
+                sum(1 for _, old, _, _, _, _, _ in diff.values() if not old),
+                sum(1 for _, _, _, new, _, _, _ in diff.values() if not new)))
+            for name, (
+                    old_hits, old_count,
+                    new_hits, new_count,
+                    diff_hits, diff_count, ratio) in sorted(diff.items(),
+                        key=lambda x: (-x[1][6], x)):
+                if ratio or args.get('all'):
+                    print("%-36s %11s %7s %11s %7s %11s%s" % (name,
+                        '%d/%d' % (old_hits, old_count)
+                            if old_count else '-',
+                        '%.1f%%' % (100*old_hits/old_count)
+                            if old_count else '-',
+                        '%d/%d' % (new_hits, new_count)
+                            if new_count else '-',
+                        '%.1f%%' % (100*new_hits/new_count)
+                            if new_count else '-',
+                        '%+d/%+d' % (diff_hits, diff_count),
+                        ' (%+.1f%%)' % (100*ratio) if ratio else ''))
+
+    def print_totals():
+        if not args.get('diff'):
+            print("%-36s %11s %7s" % ('TOTAL',
+                '%d/%d' % (total_hits, total_count)
+                    if total_count else '-',
+                '%.1f%%' % (100*total_hits/total_count)
+                    if total_count else '-'))
+        else:
+            ratio = ((total_hits/total_count
+                    if total_count else 1.0)
+                - (prev_total_hits/prev_total_count
+                    if prev_total_count else 1.0))
+            print("%-36s %11s %7s %11s %7s %11s%s" % ('TOTAL',
+                '%d/%d' % (prev_total_hits, prev_total_count)
+                    if prev_total_count else '-',
+                '%.1f%%' % (100*prev_total_hits/prev_total_count)
+                    if prev_total_count else '-',
+                '%d/%d' % (total_hits, total_count)
+                    if total_count else '-',
+                '%.1f%%' % (100*total_hits/total_count)
+                    if total_count else '-',
+                '%+d/%+d' % (total_hits-prev_total_hits,
+                    total_count-prev_total_count),
+                ' (%+.1f%%)' % (100*ratio) if ratio else ''))
+
+    if args.get('quiet'):
+        pass
+    elif args.get('summary'):
+        print_header()
+        print_totals()
+    elif args.get('files'):
+        print_entries(by='file')
+        print_totals()
+    else:
+        print_entries(by='function')
+        print_totals()
+
+if __name__ == "__main__":
+    import argparse
+    import sys
+    parser = argparse.ArgumentParser(
+        description="Parse and report coverage info from .info files \
+            generated by lcov")
+    parser.add_argument('info_paths', nargs='*', default=INFO_PATHS,
+        help="Description of where to find *.info files. May be a directory \
+            or list of paths. *.info files will be merged to show the total \
+            coverage. Defaults to %r." % INFO_PATHS)
+    parser.add_argument('-v', '--verbose', action='store_true',
+        help="Output commands that run behind the scenes.")
+    parser.add_argument('-o', '--output',
+        help="Specify CSV file to store results.")
+    parser.add_argument('-u', '--use',
+        help="Don't do any work, instead use this CSV file.")
+    parser.add_argument('-d', '--diff',
+        help="Specify CSV file to diff code size against.")
+    parser.add_argument('-a', '--all', action='store_true',
+        help="Show all functions, not just the ones that changed.")
+    parser.add_argument('--files', action='store_true',
+        help="Show file-level coverage.")
+    parser.add_argument('-s', '--summary', action='store_true',
+        help="Only show the total coverage.")
+    parser.add_argument('-q', '--quiet', action='store_true',
+        help="Don't show anything, useful with -o.")
+    sys.exit(main(**vars(parser.parse_args())))

scripts/explode_asserts.py

@@ -3,8 +3,8 @@
 import re
 import sys
 
-PATTERN = ['LFS_ASSERT', 'assert']
-PREFIX = 'LFS'
+PATTERN = ['LFS2_ASSERT', 'assert']
+PREFIX = 'LFS2'
 MAXWIDTH = 16
 
 ASSERT = "__{PREFIX}_ASSERT_{TYPE}_{COMP}"
@@ -166,8 +166,8 @@ def mkassert(type, comp, lh, rh, size=None):
         'type': type.lower(), 'TYPE': type.upper(),
         'comp': comp.lower(), 'COMP': comp.upper(),
         'prefix': PREFIX.lower(), 'PREFIX': PREFIX.upper(),
-        'lh': lh.strip(),
-        'rh': rh.strip(),
+        'lh': lh.strip(' '),
+        'rh': rh.strip(' '),
         'size': size,
     }
     if size:

scripts/prefix.py

@@ -5,7 +5,7 @@
 # conflict at compile time.
 #
 # example:
-# $ ./scripts/prefix.py lfs2
+# $ ./scripts/prefix.py lfs22
 
 import os
 import os.path
@@ -16,7 +16,7 @@ import tempfile
 import shutil
 import subprocess
 
-DEFAULT_PREFIX = "lfs"
+DEFAULT_PREFIX = "lfs2"
 
 def subn(from_prefix, to_prefix, name):
     name, count1 = re.subn('\\b'+from_prefix, to_prefix, name)

scripts/readmdir.py

@@ -233,8 +233,8 @@ class MetadataPair:
 
     def __lt__(self, other):
         # corrupt blocks don't count
-        if not self and other:
-            return True
+        if not self or not other:
+            return bool(other)
 
         # use sequence arithmetic to avoid overflow
         return not ((other.rev - self.rev) & 0x80000000)
@@ -318,6 +318,24 @@ def main(args):
 
     # find most recent pair
     mdir = MetadataPair(blocks)
+
+    try:
+        mdir.tail = mdir[Tag('tail', 0, 0)]
+        if mdir.tail.size != 8 or mdir.tail.data == 8*b'\xff':
+            mdir.tail = None
+    except KeyError:
+        mdir.tail = None
+
+    print("mdir {%s} rev %d%s%s%s" % (
+        ', '.join('%#x' % b
+            for b in [args.block1, args.block2]
+            if b is not None),
+        mdir.rev,
+        ' (was %s)' % ', '.join('%d' % m.rev for m in mdir.pair[1:])
+        if len(mdir.pair) > 1 else '',
+        ' (corrupted!)' if not mdir else '',
+        ' -> {%#x, %#x}' % struct.unpack('<II', mdir.tail.data)
+        if mdir.tail else ''))
     if args.all:
         mdir.dump_all(truncate=not args.no_truncate)
     elif args.log:

scripts/readtree.py

@@ -7,79 +7,14 @@ import io
 import itertools as it
 from readmdir import Tag, MetadataPair
 
-def popc(x):
-    return bin(x).count('1')
-
-def ctz(x):
-    return len(bin(x)) - len(bin(x).rstrip('0'))
-
-def dumpentries(args, mdir, f):
-    for k, id_ in enumerate(mdir.ids):
-        name = mdir[Tag('name', id_, 0)]
-        struct_ = mdir[Tag('struct', id_, 0)]
-
-        f.write("id %d %s %s" % (
-            id_, name.typerepr(),
-            json.dumps(name.data.decode('utf8'))))
-        if struct_.is_('dirstruct'):
-            f.write(" dir {%#x, %#x}" % struct.unpack(
-                '<II', struct_.data[:8].ljust(8, b'\xff')))
-        if struct_.is_('ctzstruct'):
-            f.write(" ctz {%#x} size %d" % struct.unpack(
-                '<II', struct_.data[:8].ljust(8, b'\xff')))
-        if struct_.is_('inlinestruct'):
-            f.write(" inline size %d" % struct_.size)
-        f.write("\n")
-
-        if args.data and struct_.is_('inlinestruct'):
-            for i in range(0, len(struct_.data), 16):
-                f.write("  %08x: %-47s  %-16s\n" % (
-                    i, ' '.join('%02x' % c for c in struct_.data[i:i+16]),
-                    ''.join(c if c >= ' ' and c <= '~' else '.'
-                        for c in map(chr, struct_.data[i:i+16]))))
-        elif args.data and struct_.is_('ctzstruct'):
-            block, size = struct.unpack(
-                '<II', struct_.data[:8].ljust(8, b'\xff'))
-            data = []
-            i = 0 if size == 0 else (size-1) // (args.block_size - 8)
-            if i != 0:
-                i = ((size-1) - 4*popc(i-1)+2) // (args.block_size - 8)
-            with open(args.disk, 'rb') as f2:
-                while i >= 0:
-                    f2.seek(block * args.block_size)
-                    dat = f2.read(args.block_size)
-                    data.append(dat[4*(ctz(i)+1) if i != 0 else 0:])
-                    block, = struct.unpack('<I', dat[:4].ljust(4, b'\xff'))
-                    i -= 1
-
-            data = bytes(it.islice(
-                it.chain.from_iterable(reversed(data)), size))
-            for i in range(0, min(len(data), 256)
-                    if not args.no_truncate else len(data), 16):
-                f.write("  %08x: %-47s  %-16s\n" % (
-                    i, ' '.join('%02x' % c for c in data[i:i+16]),
-                    ''.join(c if c >= ' ' and c <= '~' else '.'
-                        for c in map(chr, data[i:i+16]))))
-
-        for tag in mdir.tags:
-            if tag.id==id_ and tag.is_('userattr'):
-                f.write("id %d %s size %d\n" % (
-                    id_, tag.typerepr(), tag.size))
-
-                if args.data:
-                    for i in range(0, len(tag.data), 16):
-                        f.write("  %-47s  %-16s\n" % (
-                            ' '.join('%02x' % c for c in tag.data[i:i+16]),
-                            ''.join(c if c >= ' ' and c <= '~' else '.'
-                                for c in map(chr, tag.data[i:i+16]))))
-
 def main(args):
+    superblock = None
+    gstate = b'\0\0\0\0\0\0\0\0\0\0\0\0'
+    dirs = []
+    mdirs = []
+    corrupted = []
+    cycle = False
     with open(args.disk, 'rb') as f:
-        dirs = []
-        superblock = None
-        gstate = b''
-        mdirs = []
-        cycle = False
         tail = (args.block1, args.block2)
         hard = False
         while True:
@@ -126,6 +61,10 @@ def main(args):
             except KeyError:
                 pass
 
+            # corrupted?
+            if not mdir:
+                corrupted.append(mdir)
+
             # add to directories
             mdirs.append(mdir)
             if mdir.tail is None or not mdir.tail.is_('hardtail'):
@@ -160,72 +99,65 @@ def main(args):
 
         dir[0].path = path.replace('//', '/')
 
-    # dump tree
-    if not args.superblock and not args.gstate and not args.mdirs:
-        args.superblock = True
-        args.gstate = True
-        args.mdirs = True
+    # print littlefs + version info
+    version = ('?', '?')
+    if superblock:
+        version = tuple(reversed(
+            struct.unpack('<HH', superblock[1].data[0:4].ljust(4, b'\xff'))))
+    print("%-47s%s" % ("littlefs v%s.%s" % version,
+        "data (truncated, if it fits)"
+        if not any([args.no_truncate, args.log, args.all]) else ""))
 
-    if args.superblock and superblock:
-        print("superblock %s v%d.%d" % (
-            json.dumps(superblock[0].data.decode('utf8')),
-            struct.unpack('<H', superblock[1].data[2:2+2])[0],
-            struct.unpack('<H', superblock[1].data[0:0+2])[0]))
-        print(
-            "  block_size %d\n"
-            "  block_count %d\n"
-            "  name_max %d\n"
-            "  file_max %d\n"
-            "  attr_max %d" % struct.unpack(
-                '<IIIII', superblock[1].data[4:4+20].ljust(20, b'\xff')))
+    # print gstate
+    print("gstate 0x%s" % ''.join('%02x' % c for c in gstate))
+    tag = Tag(struct.unpack('<I', gstate[0:4].ljust(4, b'\xff'))[0])
+    blocks = struct.unpack('<II', gstate[4:4+8].ljust(8, b'\xff'))
+    if tag.size or not tag.isvalid:
+        print("  orphans >=%d" % max(tag.size, 1))
+    if tag.type:
+        print("  move dir {%#x, %#x} id %d" % (
+            blocks[0], blocks[1], tag.id))
 
-    if args.gstate and gstate:
-        print("gstate 0x%s" % ''.join('%02x' % c for c in gstate))
-        tag = Tag(struct.unpack('<I', gstate[0:4].ljust(4, b'\xff'))[0])
-        blocks = struct.unpack('<II', gstate[4:4+8].ljust(8, b'\xff'))
-        if tag.size:
-            print("  orphans %d" % tag.size)
-        if tag.type:
-            print("  move dir {%#x, %#x} id %d" % (
-                blocks[0], blocks[1], tag.id))
+    # print mdir info
+    for i, dir in enumerate(dirs):
+        print("dir %s" % (json.dumps(dir[0].path)
+            if hasattr(dir[0], 'path') else '(orphan)'))
 
-    if args.mdirs:
-        for i, dir in enumerate(dirs):
-            print("dir %s" % (json.dumps(dir[0].path)
-                if hasattr(dir[0], 'path') else '(orphan)'))
+        for j, mdir in enumerate(dir):
+            print("mdir {%#x, %#x} rev %d (was %d)%s%s" % (
+                mdir.blocks[0], mdir.blocks[1], mdir.rev, mdir.pair[1].rev,
+                ' (corrupted!)' if not mdir else '',
+                ' -> {%#x, %#x}' % struct.unpack('<II', mdir.tail.data)
+                if mdir.tail else ''))
 
-            for j, mdir in enumerate(dir):
-                print("mdir {%#x, %#x} rev %d%s" % (
-                    mdir.blocks[0], mdir.blocks[1], mdir.rev,
-                    ' (corrupted)' if not mdir else ''))
+            f = io.StringIO()
+            if args.log:
+                mdir.dump_log(f, truncate=not args.no_truncate)
+            elif args.all:
+                mdir.dump_all(f, truncate=not args.no_truncate)
+            else:
+                mdir.dump_tags(f, truncate=not args.no_truncate)
 
-                f = io.StringIO()
-                if args.tags:
-                    mdir.dump_tags(f, truncate=not args.no_truncate)
-                elif args.log:
-                    mdir.dump_log(f, truncate=not args.no_truncate)
-                elif args.all:
-                    mdir.dump_all(f, truncate=not args.no_truncate)
-                else:
-                    dumpentries(args, mdir, f)
+            lines = list(filter(None, f.getvalue().split('\n')))
+            for k, line in enumerate(lines):
+                print("%s %s" % (
+                    ' ' if j == len(dir)-1 else
+                    'v' if k == len(lines)-1 else
+                    '|',
+                    line))
 
-                lines = list(filter(None, f.getvalue().split('\n')))
-                for k, line in enumerate(lines):
-                    print("%s %s" % (
-                        ' ' if j == len(dir)-1 else
-                        'v' if k == len(lines)-1 else
-                        '|',
-                        line))
+    errcode = 0
+    for mdir in corrupted:
+        errcode = errcode or 1
+        print("*** corrupted mdir {%#x, %#x}! ***" % (
+            mdir.blocks[0], mdir.blocks[1]))
 
     if cycle:
-        print("*** cycle detected! -> {%#x, %#x} ***" % (cycle[0], cycle[1]))
+        errcode = errcode or 2
+        print("*** cycle detected {%#x, %#x}! ***" % (
+            cycle[0], cycle[1]))
 
-    if cycle:
-        return 2
-    elif not all(mdir for dir in dirs for mdir in dir):
-        return 1
-    else:
-        return 0;
+    return errcode
 
 if __name__ == "__main__":
     import argparse
@@ -238,24 +170,14 @@ if __name__ == "__main__":
         help="Size of a block in bytes.")
     parser.add_argument('block1', nargs='?', default=0,
         type=lambda x: int(x, 0),
-        help="Optional first block address for finding the root.")
+        help="Optional first block address for finding the superblock.")
     parser.add_argument('block2', nargs='?', default=1,
         type=lambda x: int(x, 0),
-        help="Optional second block address for finding the root.")
-    parser.add_argument('-s', '--superblock', action='store_true',
-        help="Show contents of the superblock.")
-    parser.add_argument('-g', '--gstate', action='store_true',
-        help="Show contents of global-state.")
-    parser.add_argument('-m', '--mdirs', action='store_true',
-        help="Show contents of metadata-pairs/directories.")
-    parser.add_argument('-t', '--tags', action='store_true',
-        help="Show metadata tags instead of reconstructing entries.")
+        help="Optional second block address for finding the superblock.")
     parser.add_argument('-l', '--log', action='store_true',
         help="Show tags in log.")
     parser.add_argument('-a', '--all', action='store_true',
         help="Show all tags in log, included tags in corrupted commits.")
-    parser.add_argument('-d', '--data', action='store_true',
-        help="Also show the raw contents of files/attrs/tags.")
     parser.add_argument('-T', '--no-truncate', action='store_true',
-        help="Don't truncate large amounts of data.")
+        help="Show the full contents of files/attrs/tags.")
     sys.exit(main(parser.parse_args()))

scripts/test.py

@@ -20,79 +20,110 @@ import pty
 import errno
 import signal
 
-TESTDIR = 'tests'
+TEST_PATHS = 'tests'
 RULES = """
+# add block devices to sources
+TESTSRC ?= $(SRC) $(wildcard bd/*.c)
+
 define FLATTEN
-tests/%$(subst /,.,$(target)): $(target)
+%(path)s%%$(subst /,.,$(target)): $(target)
     ./scripts/explode_asserts.py $$< -o $$@
 endef
-$(foreach target,$(SRC),$(eval $(FLATTEN)))
-
--include tests/*.d
+$(foreach target,$(TESTSRC),$(eval $(FLATTEN)))
 
+-include %(path)s*.d
 .SECONDARY:
-%.test: %.test.o $(foreach f,$(subst /,.,$(SRC:.c=.o)),%.$f)
+
+%(path)s.test: %(path)s.test.o \\
+        $(foreach t,$(subst /,.,$(TESTSRC:.c=.o)),%(path)s.$t)
     $(CC) $(CFLAGS) $^ $(LFLAGS) -o $@
+
+# needed in case builddir is different
+%(path)s%%.o: %(path)s%%.c
+    $(CC) -c -MMD $(CFLAGS) $< -o $@
+"""
+COVERAGE_RULES = """
+%(path)s.test: override CFLAGS += -fprofile-arcs -ftest-coverage
+
+# delete lingering coverage
+%(path)s.test: | %(path)s.info.clean
+.PHONY: %(path)s.info.clean
+%(path)s.info.clean:
+    rm -f %(path)s*.gcda
+
+# accumulate coverage info
+.PHONY: %(path)s.info
+%(path)s.info:
+    $(strip $(LCOV) -c \\
+        $(addprefix -d ,$(wildcard %(path)s*.gcda)) \\
+        --rc 'geninfo_adjust_src_path=$(shell pwd)' \\
+        -o $@)
+    $(LCOV) -e $@ $(addprefix /,$(SRC)) -o $@
+ifdef COVERAGETARGET
+    $(strip $(LCOV) -a $@ \\
+        $(addprefix -a ,$(wildcard $(COVERAGETARGET))) \\
+        -o $(COVERAGETARGET))
+endif
 """
 GLOBALS = """
 //////////////// AUTOGENERATED TEST ////////////////
-#include "lfs.h"
-#include "bd/lfs_testbd.h"
+#include "lfs2.h"
+#include "bd/lfs2_testbd.h"
 #include <stdio.h>
-extern const char *lfs_testbd_path;
-extern uint32_t lfs_testbd_cycles;
+extern const char *lfs2_testbd_path;
+extern uint32_t lfs2_testbd_cycles;
 """
 DEFINES = {
-    'LFS_READ_SIZE': 16,
-    'LFS_PROG_SIZE': 'LFS_READ_SIZE',
-    'LFS_BLOCK_SIZE': 512,
-    'LFS_BLOCK_COUNT': 1024,
-    'LFS_BLOCK_CYCLES': -1,
-    'LFS_CACHE_SIZE': '(64 % LFS_PROG_SIZE == 0 ? 64 : LFS_PROG_SIZE)',
-    'LFS_LOOKAHEAD_SIZE': 16,
-    'LFS_ERASE_VALUE': 0xff,
-    'LFS_ERASE_CYCLES': 0,
-    'LFS_BADBLOCK_BEHAVIOR': 'LFS_TESTBD_BADBLOCK_PROGERROR',
+    'LFS2_READ_SIZE': 16,
+    'LFS2_PROG_SIZE': 'LFS2_READ_SIZE',
+    'LFS2_BLOCK_SIZE': 512,
+    'LFS2_BLOCK_COUNT': 1024,
+    'LFS2_BLOCK_CYCLES': -1,
+    'LFS2_CACHE_SIZE': '(64 % LFS2_PROG_SIZE == 0 ? 64 : LFS2_PROG_SIZE)',
+    'LFS2_LOOKAHEAD_SIZE': 16,
+    'LFS2_ERASE_VALUE': 0xff,
+    'LFS2_ERASE_CYCLES': 0,
+    'LFS2_BADBLOCK_BEHAVIOR': 'LFS2_TESTBD_BADBLOCK_PROGERROR',
 }
 PROLOGUE = """
     // prologue
-    __attribute__((unused)) lfs_t lfs;
-    __attribute__((unused)) lfs_testbd_t bd;
-    __attribute__((unused)) lfs_file_t file;
-    __attribute__((unused)) lfs_dir_t dir;
-    __attribute__((unused)) struct lfs_info info;
+    __attribute__((unused)) lfs2_t lfs2;
+    __attribute__((unused)) lfs2_testbd_t bd;
+    __attribute__((unused)) lfs2_file_t file;
+    __attribute__((unused)) lfs2_dir_t dir;
+    __attribute__((unused)) struct lfs2_info info;
     __attribute__((unused)) char path[1024];
     __attribute__((unused)) uint8_t buffer[1024];
-    __attribute__((unused)) lfs_size_t size;
+    __attribute__((unused)) lfs2_size_t size;
     __attribute__((unused)) int err;
     
-    __attribute__((unused)) const struct lfs_config cfg = {
+    __attribute__((unused)) const struct lfs2_config cfg = {
         .context        = &bd,
-        .read           = lfs_testbd_read,
-        .prog           = lfs_testbd_prog,
-        .erase          = lfs_testbd_erase,
-        .sync           = lfs_testbd_sync,
-        .read_size      = LFS_READ_SIZE,
-        .prog_size      = LFS_PROG_SIZE,
-        .block_size     = LFS_BLOCK_SIZE,
-        .block_count    = LFS_BLOCK_COUNT,
-        .block_cycles   = LFS_BLOCK_CYCLES,
-        .cache_size     = LFS_CACHE_SIZE,
-        .lookahead_size = LFS_LOOKAHEAD_SIZE,
+        .read           = lfs2_testbd_read,
+        .prog           = lfs2_testbd_prog,
+        .erase          = lfs2_testbd_erase,
+        .sync           = lfs2_testbd_sync,
+        .read_size      = LFS2_READ_SIZE,
+        .prog_size      = LFS2_PROG_SIZE,
+        .block_size     = LFS2_BLOCK_SIZE,
+        .block_count    = LFS2_BLOCK_COUNT,
+        .block_cycles   = LFS2_BLOCK_CYCLES,
+        .cache_size     = LFS2_CACHE_SIZE,
+        .lookahead_size = LFS2_LOOKAHEAD_SIZE,
     };
 
-    __attribute__((unused)) const struct lfs_testbd_config bdcfg = {
-        .erase_value        = LFS_ERASE_VALUE,
-        .erase_cycles       = LFS_ERASE_CYCLES,
-        .badblock_behavior  = LFS_BADBLOCK_BEHAVIOR,
-        .power_cycles       = lfs_testbd_cycles,
+    __attribute__((unused)) const struct lfs2_testbd_config bdcfg = {
+        .erase_value        = LFS2_ERASE_VALUE,
+        .erase_cycles       = LFS2_ERASE_CYCLES,
+        .badblock_behavior  = LFS2_BADBLOCK_BEHAVIOR,
+        .power_cycles       = lfs2_testbd_cycles,
     };
 
-    lfs_testbd_createcfg(&cfg, lfs_testbd_path, &bdcfg) => 0;
+    lfs2_testbd_createcfg(&cfg, lfs2_testbd_path, &bdcfg) => 0;
 """
 EPILOGUE = """
     // epilogue
-    lfs_testbd_destroy(&cfg) => 0;
+    lfs2_testbd_destroy(&cfg) => 0;
 """
 PASS = '\033[32m✓\033[0m'
 FAIL = '\033[31m✗\033[0m'
@@ -119,6 +150,8 @@ class TestCase:
         self.if_ = config.get('if', None)
         self.in_ = config.get('in', None)
 
+        self.result = None
+
     def __str__(self):
         if hasattr(self, 'permno'):
             if any(k not in self.case.defines for k in self.defines):
@@ -179,7 +212,7 @@ class TestCase:
                 len(self.filter) >= 2 and
                 self.filter[1] != self.permno):
             return False
-        elif args.get('no_internal', False) and self.in_ is not None:
+        elif args.get('no_internal') and self.in_ is not None:
             return False
         elif self.if_ is not None:
             if_ = self.if_
@@ -213,7 +246,7 @@ class TestCase:
                 try:
                     with open(disk, 'w') as f:
                         f.truncate(0)
-                    if args.get('verbose', False):
+                    if args.get('verbose'):
                         print('truncate --size=0', disk)
                 except FileNotFoundError:
                     pass
@@ -231,20 +264,20 @@ class TestCase:
                 ncmd.extend(['-ex', 'r'])
                 if failure.assert_:
                     ncmd.extend(['-ex', 'up 2'])
-            elif gdb == 'start':
+            elif gdb == 'main':
                 ncmd.extend([
                     '-ex', 'b %s:%d' % (self.suite.path, self.code_lineno),
                     '-ex', 'r'])
             ncmd.extend(['--args'] + cmd)
 
-            if args.get('verbose', False):
+            if args.get('verbose'):
                 print(' '.join(shlex.quote(c) for c in ncmd))
             signal.signal(signal.SIGINT, signal.SIG_IGN)
             sys.exit(sp.call(ncmd))
 
         # run test case!
         mpty, spty = pty.openpty()
-        if args.get('verbose', False):
+        if args.get('verbose'):
             print(' '.join(shlex.quote(c) for c in cmd))
         proc = sp.Popen(cmd, stdout=spty, stderr=spty)
         os.close(spty)
@@ -259,8 +292,10 @@ class TestCase:
                     if e.errno == errno.EIO:
                         break
                     raise
+                if not line:
+                    break;
                 stdout.append(line)
-                if args.get('verbose', False):
+                if args.get('verbose'):
                     sys.stdout.write(line)
                 # intercept asserts
                 m = re.match(
@@ -299,8 +334,8 @@ class ValgrindTestCase(TestCase):
         return not self.leaky and super().shouldtest(**args)
 
     def test(self, exec=[], **args):
-        verbose = args.get('verbose', False)
-        uninit = (self.defines.get('LFS_ERASE_VALUE', None) == -1)
+        verbose = args.get('verbose')
+        uninit = (self.defines.get('LFS2_ERASE_VALUE', None) == -1)
         exec = [
             'valgrind',
             '--leak-check=full',
@@ -351,12 +386,17 @@ class TestSuite:
         self.name = os.path.basename(path)
         if self.name.endswith('.toml'):
             self.name = self.name[:-len('.toml')]
-        self.path = path
+        if args.get('build_dir'):
+            self.toml = path
+            self.path = args['build_dir'] + '/' + path
+        else:
+            self.toml = path
+            self.path = path
         self.classes = classes
         self.defines = defines.copy()
         self.filter = filter
 
-        with open(path) as f:
+        with open(self.toml) as f:
             # load tests
             config = toml.load(f)
 
@@ -467,7 +507,7 @@ class TestSuite:
 
     def build(self, **args):
         # build test files
-        tf = open(self.path + '.test.c.t', 'w')
+        tf = open(self.path + '.test.tc', 'w')
         tf.write(GLOBALS)
         if self.code is not None:
             tf.write('#line %d "%s"\n' % (self.code_lineno, self.path))
@@ -477,7 +517,7 @@ class TestSuite:
         for case in self.cases:
             if case.in_ not in tfs:
                 tfs[case.in_] = open(self.path+'.'+
-                    case.in_.replace('/', '.')+'.t', 'w')
+                    re.sub('(\.c)?$', '.tc', case.in_.replace('/', '.')), 'w')
                 tfs[case.in_].write('#line 1 "%s"\n' % case.in_)
                 with open(case.in_) as f:
                     for line in f:
@@ -489,13 +529,13 @@ class TestSuite:
             case.build(tfs[case.in_], **args)
 
         tf.write('\n')
-        tf.write('const char *lfs_testbd_path;\n')
-        tf.write('uint32_t lfs_testbd_cycles;\n')
+        tf.write('const char *lfs2_testbd_path;\n')
+        tf.write('uint32_t lfs2_testbd_cycles;\n')
         tf.write('int main(int argc, char **argv) {\n')
         tf.write(4*' '+'int case_         = (argc > 1) ? atoi(argv[1]) : 0;\n')
         tf.write(4*' '+'int perm          = (argc > 2) ? atoi(argv[2]) : 0;\n')
-        tf.write(4*' '+'lfs_testbd_path   = (argc > 3) ? argv[3] : NULL;\n')
-        tf.write(4*' '+'lfs_testbd_cycles = (argc > 4) ? atoi(argv[4]) : 0;\n')
+        tf.write(4*' '+'lfs2_testbd_path   = (argc > 3) ? argv[3] : NULL;\n')
+        tf.write(4*' '+'lfs2_testbd_cycles = (argc > 4) ? atoi(argv[4]) : 0;\n')
         for perm in self.perms:
             # test declaration
             tf.write(4*' '+'extern void test_case%d(%s);\n' % (
@@ -516,25 +556,33 @@ class TestSuite:
 
         # write makefiles
         with open(self.path + '.mk', 'w') as mk:
-            mk.write(RULES.replace(4*' ', '\t'))
+            mk.write(RULES.replace(4*' ', '\t') % dict(path=self.path))
             mk.write('\n')
 
-            # add truely global defines globally
+            # add coverage hooks?
+            if args.get('coverage'):
+                mk.write(COVERAGE_RULES.replace(4*' ', '\t') % dict(
+                    path=self.path))
+                mk.write('\n')
+
+            # add truly global defines globally
             for k, v in sorted(self.defines.items()):
-                mk.write('%s: override CFLAGS += -D%s=%r\n' % (
-                    self.path+'.test', k, v))
+                mk.write('%s.test: override CFLAGS += -D%s=%r\n'
+                    % (self.path, k, v))
 
             for path in tfs:
                 if path is None:
                     mk.write('%s: %s | %s\n' % (
                         self.path+'.test.c',
-                        self.path,
-                        self.path+'.test.c.t'))
+                        self.toml,
+                        self.path+'.test.tc'))
                 else:
                     mk.write('%s: %s %s | %s\n' % (
                         self.path+'.'+path.replace('/', '.'),
-                        self.path, path,
-                        self.path+'.'+path.replace('/', '.')+'.t'))
+                        self.toml,
+                        path,
+                        self.path+'.'+re.sub('(\.c)?$', '.tc',
+                            path.replace('/', '.'))))
                 mk.write('\t./scripts/explode_asserts.py $| -o $@\n')
 
         self.makefile = self.path + '.mk'
@@ -557,7 +605,7 @@ class TestSuite:
                 if not args.get('verbose', True):
                     sys.stdout.write(FAIL)
                     sys.stdout.flush()
-                if not args.get('keep_going', False):
+                if not args.get('keep_going'):
                     if not args.get('verbose', True):
                         sys.stdout.write('\n')
                     raise
@@ -579,36 +627,36 @@ def main(**args):
 
     # and what class of TestCase to run
     classes = []
-    if args.get('normal', False):
+    if args.get('normal'):
         classes.append(TestCase)
-    if args.get('reentrant', False):
+    if args.get('reentrant'):
         classes.append(ReentrantTestCase)
-    if args.get('valgrind', False):
+    if args.get('valgrind'):
         classes.append(ValgrindTestCase)
     if not classes:
         classes = [TestCase]
 
     suites = []
-    for testpath in args['testpaths']:
+    for testpath in args['test_paths']:
         # optionally specified test case/perm
         testpath, *filter = testpath.split('#')
         filter = [int(f) for f in filter]
 
         # figure out the suite's toml file
         if os.path.isdir(testpath):
-            testpath = testpath + '/test_*.toml'
+            testpath = testpath + '/*.toml'
         elif os.path.isfile(testpath):
             testpath = testpath
         elif testpath.endswith('.toml'):
-            testpath = TESTDIR + '/' + testpath
+            testpath = TEST_PATHS + '/' + testpath
         else:
-            testpath = TESTDIR + '/' + testpath + '.toml'
+            testpath = TEST_PATHS + '/' + testpath + '.toml'
 
         # find tests
         for path in glob.glob(testpath):
             suites.append(TestSuite(path, classes, defines, filter, **args))
 
-    # sort for reproducability
+    # sort for reproducibility
     suites = sorted(suites)
 
     # generate permutations
@@ -628,7 +676,7 @@ def main(**args):
         list(it.chain.from_iterable(['-f', m] for m in makefiles)) +
         [target for target in targets])
     mpty, spty = pty.openpty()
-    if args.get('verbose', False):
+    if args.get('verbose'):
         print(' '.join(shlex.quote(c) for c in cmd))
     proc = sp.Popen(cmd, stdout=spty, stderr=spty)
     os.close(spty)
@@ -641,15 +689,17 @@ def main(**args):
             if e.errno == errno.EIO:
                 break
             raise
+        if not line:
+            break;
         stdout.append(line)
-        if args.get('verbose', False):
+        if args.get('verbose'):
             sys.stdout.write(line)
         # intercept warnings
         m = re.match(
             '^{0}([^:]+):(\d+):(?:\d+:)?{0}{1}:{0}(.*)$'
             .format('(?:\033\[[\d;]*.| )*', 'warning'),
             line)
-        if m and not args.get('verbose', False):
+        if m and not args.get('verbose'):
             try:
                 with open(m.group(1)) as f:
                     lineno = int(m.group(2))
@@ -662,27 +712,26 @@ def main(**args):
             except:
                 pass
     proc.wait()
-
     if proc.returncode != 0:
-        if not args.get('verbose', False):
+        if not args.get('verbose'):
             for line in stdout:
                 sys.stdout.write(line)
-        sys.exit(-3)
+        sys.exit(-1)
 
     print('built %d test suites, %d test cases, %d permutations' % (
         len(suites),
         sum(len(suite.cases) for suite in suites),
         sum(len(suite.perms) for suite in suites)))
 
-    filtered = 0
+    total = 0
     for suite in suites:
         for perm in suite.perms:
-            filtered += perm.shouldtest(**args)
-    if filtered != sum(len(suite.perms) for suite in suites):
-        print('filtered down to %d permutations' % filtered)
+            total += perm.shouldtest(**args)
+    if total != sum(len(suite.perms) for suite in suites):
+        print('filtered down to %d permutations' % total)
 
     # only requested to build?
-    if args.get('build', False):
+    if args.get('build'):
         return 0
 
     print('====== testing ======')
@@ -697,15 +746,12 @@ def main(**args):
     failed = 0
     for suite in suites:
         for perm in suite.perms:
-            if not hasattr(perm, 'result'):
-                continue
-
             if perm.result == PASS:
                 passed += 1
-            else:
+            elif isinstance(perm.result, TestFailure):
                 sys.stdout.write(
                     "\033[01m{path}:{lineno}:\033[01;31mfailure:\033[m "
-                    "{perm} failed with {returncode}\n".format(
+                    "{perm} failed\n".format(
                         perm=perm, path=perm.suite.path, lineno=perm.lineno,
                         returncode=perm.result.returncode or 0))
                 if perm.result.stdout:
@@ -723,11 +769,33 @@ def main(**args):
                 sys.stdout.write('\n')
                 failed += 1
 
-    if args.get('gdb', False):
+    if args.get('coverage'):
+        # collect coverage info
+        # why -j1? lcov doesn't work in parallel because of gcov limitations
+        cmd = (['make', '-j1', '-f', 'Makefile'] +
+            list(it.chain.from_iterable(['-f', m] for m in makefiles)) +
+            (['COVERAGETARGET=%s' % args['coverage']]
+                if isinstance(args['coverage'], str) else []) +
+            [suite.path + '.info' for suite in suites
+                if any(perm.result == PASS for perm in suite.perms)])
+        if args.get('verbose'):
+            print(' '.join(shlex.quote(c) for c in cmd))
+        proc = sp.Popen(cmd,
+            stdout=sp.PIPE if not args.get('verbose') else None,
+            stderr=sp.STDOUT if not args.get('verbose') else None,
+            universal_newlines=True)
+        proc.wait()
+        if proc.returncode != 0:
+            if not args.get('verbose'):
+                for line in proc.stdout:
+                    sys.stdout.write(line)
+            sys.exit(-1)
+
+    if args.get('gdb'):
         failure = None
         for suite in suites:
             for perm in suite.perms:
-                if getattr(perm, 'result', PASS) != PASS:
+                if isinstance(perm.result, TestFailure):
                     failure = perm.result
         if failure is not None:
             print('======= gdb ======')
@@ -735,20 +803,22 @@ def main(**args):
             failure.case.test(failure=failure, **args)
             sys.exit(0)
 
-    print('tests passed: %d' % passed)
-    print('tests failed: %d' % failed)
+    print('tests passed %d/%d (%.2f%%)' % (passed, total,
+        100*(passed/total if total else 1.0)))
+    print('tests failed %d/%d (%.2f%%)' % (failed, total,
+        100*(failed/total if total else 1.0)))
     return 1 if failed > 0 else 0
 
 if __name__ == "__main__":
     import argparse
     parser = argparse.ArgumentParser(
         description="Run parameterized tests in various configurations.")
-    parser.add_argument('testpaths', nargs='*', default=[TESTDIR],
+    parser.add_argument('test_paths', nargs='*', default=[TEST_PATHS],
         help="Description of test(s) to run. By default, this is all tests \
             found in the \"{0}\" directory. Here, you can specify a different \
-            directory of tests, a specific file, a suite by name, and even a \
-            specific test case by adding brackets. For example \
-            \"test_dirs[0]\" or \"{0}/test_dirs.toml[0]\".".format(TESTDIR))
+            directory of tests, a specific file, a suite by name, and even \
+            specific test cases and permutations. For example \
+            \"test_dirs#1\" or \"{0}/test_dirs.toml#1#1\".".format(TEST_PATHS))
     parser.add_argument('-D', action='append', default=[],
         help="Overriding parameter definitions.")
     parser.add_argument('-v', '--verbose', action='store_true',
@@ -760,7 +830,7 @@ if __name__ == "__main__":
         help="Store disk image in a file.")
     parser.add_argument('-b', '--build', action='store_true',
         help="Only build the tests, do not execute.")
-    parser.add_argument('-g', '--gdb', choices=['init', 'start', 'assert'],
+    parser.add_argument('-g', '--gdb', choices=['init', 'main', 'assert'],
         nargs='?', const='assert',
         help="Drop into gdb on test failure.")
     parser.add_argument('--no-internal', action='store_true',
@@ -769,10 +839,19 @@ if __name__ == "__main__":
         help="Run tests normally.")
     parser.add_argument('-r', '--reentrant', action='store_true',
         help="Run reentrant tests with simulated power-loss.")
-    parser.add_argument('-V', '--valgrind', action='store_true',
+    parser.add_argument('--valgrind', action='store_true',
         help="Run non-leaky tests under valgrind to check for memory leaks.")
-    parser.add_argument('-e', '--exec', default=[], type=lambda e: e.split(' '),
+    parser.add_argument('--exec', default=[], type=lambda e: e.split(),
         help="Run tests with another executable prefixed on the command line.")
-    parser.add_argument('-d', '--disk',
+    parser.add_argument('--disk',
         help="Specify a file to use for persistent/reentrant tests.")
+    parser.add_argument('--coverage', type=lambda x: x if x else True,
+        nargs='?', const='',
+        help="Collect coverage information during testing. This uses lcov/gcov \
+            to accumulate coverage information into *.info files. May also \
+            a path to a *.info file to accumulate coverage info into.")
+    parser.add_argument('--build-dir',
+        help="Build relative to the specified directory instead of the \
+            current directory.")
+
     sys.exit(main(**vars(parser.parse_args())))

tests/test_alloc.toml

@@ -1,569 +1,653 @@
 # allocator tests
 # note for these to work there are a number constraints on the device geometry
-if = 'LFS_BLOCK_CYCLES == -1'
+if = 'LFS2_BLOCK_CYCLES == -1'
 
 [[case]] # parallel allocation test
 define.FILES = 3
-define.SIZE = '(((LFS_BLOCK_SIZE-8)*(LFS_BLOCK_COUNT-6)) / FILES)'
+define.SIZE = '(((LFS2_BLOCK_SIZE-8)*(LFS2_BLOCK_COUNT-6)) / FILES)'
 code = '''
     const char *names[FILES] = {"bacon", "eggs", "pancakes"};
-    lfs_file_t files[FILES];
+    lfs2_file_t files[FILES];
 
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "breakfast") => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "breakfast") => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (int n = 0; n < FILES; n++) {
         sprintf(path, "breakfast/%s", names[n]);
-        lfs_file_open(&lfs, &files[n], path,
-                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
+        lfs2_file_open(&lfs2, &files[n], path,
+                LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_APPEND) => 0;
     }
     for (int n = 0; n < FILES; n++) {
         size = strlen(names[n]);
-        for (lfs_size_t i = 0; i < SIZE; i += size) {
-            lfs_file_write(&lfs, &files[n], names[n], size) => size;
+        for (lfs2_size_t i = 0; i < SIZE; i += size) {
+            lfs2_file_write(&lfs2, &files[n], names[n], size) => size;
         }
     }
     for (int n = 0; n < FILES; n++) {
-        lfs_file_close(&lfs, &files[n]) => 0;
+        lfs2_file_close(&lfs2, &files[n]) => 0;
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (int n = 0; n < FILES; n++) {
         sprintf(path, "breakfast/%s", names[n]);
-        lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
+        lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
         size = strlen(names[n]);
-        for (lfs_size_t i = 0; i < SIZE; i += size) {
-            lfs_file_read(&lfs, &file, buffer, size) => size;
+        for (lfs2_size_t i = 0; i < SIZE; i += size) {
+            lfs2_file_read(&lfs2, &file, buffer, size) => size;
             assert(memcmp(buffer, names[n], size) == 0);
         }
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # serial allocation test
 define.FILES = 3
-define.SIZE = '(((LFS_BLOCK_SIZE-8)*(LFS_BLOCK_COUNT-6)) / FILES)'
+define.SIZE = '(((LFS2_BLOCK_SIZE-8)*(LFS2_BLOCK_COUNT-6)) / FILES)'
 code = '''
     const char *names[FILES] = {"bacon", "eggs", "pancakes"};
 
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "breakfast") => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "breakfast") => 0;
+    lfs2_unmount(&lfs2) => 0;
 
     for (int n = 0; n < FILES; n++) {
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
         sprintf(path, "breakfast/%s", names[n]);
-        lfs_file_open(&lfs, &file, path,
-                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
+        lfs2_file_open(&lfs2, &file, path,
+                LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_APPEND) => 0;
         size = strlen(names[n]);
         memcpy(buffer, names[n], size);
         for (int i = 0; i < SIZE; i += size) {
-            lfs_file_write(&lfs, &file, buffer, size) => size;
+            lfs2_file_write(&lfs2, &file, buffer, size) => size;
         }
-        lfs_file_close(&lfs, &file) => 0;
-        lfs_unmount(&lfs) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
+        lfs2_unmount(&lfs2) => 0;
     }
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (int n = 0; n < FILES; n++) {
         sprintf(path, "breakfast/%s", names[n]);
-        lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
+        lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
         size = strlen(names[n]);
         for (int i = 0; i < SIZE; i += size) {
-            lfs_file_read(&lfs, &file, buffer, size) => size;
+            lfs2_file_read(&lfs2, &file, buffer, size) => size;
             assert(memcmp(buffer, names[n], size) == 0);
         }
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # parallel allocation reuse test
 define.FILES = 3
-define.SIZE = '(((LFS_BLOCK_SIZE-8)*(LFS_BLOCK_COUNT-6)) / FILES)'
+define.SIZE = '(((LFS2_BLOCK_SIZE-8)*(LFS2_BLOCK_COUNT-6)) / FILES)'
 define.CYCLES = [1, 10]
 code = '''
     const char *names[FILES] = {"bacon", "eggs", "pancakes"};
-    lfs_file_t files[FILES];
+    lfs2_file_t files[FILES];
 
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
 
     for (int c = 0; c < CYCLES; c++) {
-        lfs_mount(&lfs, &cfg) => 0;
-        lfs_mkdir(&lfs, "breakfast") => 0;
-        lfs_unmount(&lfs) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
+        lfs2_mkdir(&lfs2, "breakfast") => 0;
+        lfs2_unmount(&lfs2) => 0;
 
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
         for (int n = 0; n < FILES; n++) {
             sprintf(path, "breakfast/%s", names[n]);
-            lfs_file_open(&lfs, &files[n], path,
-                    LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
+            lfs2_file_open(&lfs2, &files[n], path,
+                    LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_APPEND) => 0;
         }
         for (int n = 0; n < FILES; n++) {
             size = strlen(names[n]);
             for (int i = 0; i < SIZE; i += size) {
-                lfs_file_write(&lfs, &files[n], names[n], size) => size;
+                lfs2_file_write(&lfs2, &files[n], names[n], size) => size;
             }
         }
         for (int n = 0; n < FILES; n++) {
-            lfs_file_close(&lfs, &files[n]) => 0;
+            lfs2_file_close(&lfs2, &files[n]) => 0;
         }
-        lfs_unmount(&lfs) => 0;
+        lfs2_unmount(&lfs2) => 0;
 
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
         for (int n = 0; n < FILES; n++) {
             sprintf(path, "breakfast/%s", names[n]);
-            lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
+            lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
             size = strlen(names[n]);
             for (int i = 0; i < SIZE; i += size) {
-                lfs_file_read(&lfs, &file, buffer, size) => size;
+                lfs2_file_read(&lfs2, &file, buffer, size) => size;
                 assert(memcmp(buffer, names[n], size) == 0);
             }
-            lfs_file_close(&lfs, &file) => 0;
+            lfs2_file_close(&lfs2, &file) => 0;
         }
-        lfs_unmount(&lfs) => 0;
+        lfs2_unmount(&lfs2) => 0;
 
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
         for (int n = 0; n < FILES; n++) {
             sprintf(path, "breakfast/%s", names[n]);
-            lfs_remove(&lfs, path) => 0;
+            lfs2_remove(&lfs2, path) => 0;
         }
-        lfs_remove(&lfs, "breakfast") => 0;
-        lfs_unmount(&lfs) => 0;
+        lfs2_remove(&lfs2, "breakfast") => 0;
+        lfs2_unmount(&lfs2) => 0;
     }
 '''
 
 [[case]] # serial allocation reuse test
 define.FILES = 3
-define.SIZE = '(((LFS_BLOCK_SIZE-8)*(LFS_BLOCK_COUNT-6)) / FILES)'
+define.SIZE = '(((LFS2_BLOCK_SIZE-8)*(LFS2_BLOCK_COUNT-6)) / FILES)'
 define.CYCLES = [1, 10]
 code = '''
     const char *names[FILES] = {"bacon", "eggs", "pancakes"};
 
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
 
     for (int c = 0; c < CYCLES; c++) {
-        lfs_mount(&lfs, &cfg) => 0;
-        lfs_mkdir(&lfs, "breakfast") => 0;
-        lfs_unmount(&lfs) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
+        lfs2_mkdir(&lfs2, "breakfast") => 0;
+        lfs2_unmount(&lfs2) => 0;
 
         for (int n = 0; n < FILES; n++) {
-            lfs_mount(&lfs, &cfg) => 0;
+            lfs2_mount(&lfs2, &cfg) => 0;
             sprintf(path, "breakfast/%s", names[n]);
-            lfs_file_open(&lfs, &file, path,
-                    LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
+            lfs2_file_open(&lfs2, &file, path,
+                    LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_APPEND) => 0;
             size = strlen(names[n]);
             memcpy(buffer, names[n], size);
             for (int i = 0; i < SIZE; i += size) {
-                lfs_file_write(&lfs, &file, buffer, size) => size;
+                lfs2_file_write(&lfs2, &file, buffer, size) => size;
             }
-            lfs_file_close(&lfs, &file) => 0;
-            lfs_unmount(&lfs) => 0;
+            lfs2_file_close(&lfs2, &file) => 0;
+            lfs2_unmount(&lfs2) => 0;
         }
 
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
         for (int n = 0; n < FILES; n++) {
             sprintf(path, "breakfast/%s", names[n]);
-            lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
+            lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
             size = strlen(names[n]);
             for (int i = 0; i < SIZE; i += size) {
-                lfs_file_read(&lfs, &file, buffer, size) => size;
+                lfs2_file_read(&lfs2, &file, buffer, size) => size;
                 assert(memcmp(buffer, names[n], size) == 0);
             }
-            lfs_file_close(&lfs, &file) => 0;
+            lfs2_file_close(&lfs2, &file) => 0;
         }
-        lfs_unmount(&lfs) => 0;
+        lfs2_unmount(&lfs2) => 0;
 
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
         for (int n = 0; n < FILES; n++) {
             sprintf(path, "breakfast/%s", names[n]);
-            lfs_remove(&lfs, path) => 0;
+            lfs2_remove(&lfs2, path) => 0;
         }
-        lfs_remove(&lfs, "breakfast") => 0;
-        lfs_unmount(&lfs) => 0;
+        lfs2_remove(&lfs2, "breakfast") => 0;
+        lfs2_unmount(&lfs2) => 0;
     }
 '''
 
 [[case]] # exhaustion test
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "exhaustion", LFS2_O_WRONLY | LFS2_O_CREAT);
     size = strlen("exhaustion");
     memcpy(buffer, "exhaustion", size);
-    lfs_file_write(&lfs, &file, buffer, size) => size;
-    lfs_file_sync(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, buffer, size) => size;
+    lfs2_file_sync(&lfs2, &file) => 0;
 
     size = strlen("blahblahblahblah");
     memcpy(buffer, "blahblahblahblah", size);
-    lfs_ssize_t res;
+    lfs2_ssize_t res;
     while (true) {
-        res = lfs_file_write(&lfs, &file, buffer, size);
+        res = lfs2_file_write(&lfs2, &file, buffer, size);
         if (res < 0) {
             break;
         }
 
         res => size;
     }
-    res => LFS_ERR_NOSPC;
+    res => LFS2_ERR_NOSPC;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "exhaustion", LFS_O_RDONLY);
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "exhaustion", LFS2_O_RDONLY);
     size = strlen("exhaustion");
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     memcmp(buffer, "exhaustion", size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # exhaustion wraparound test
-define.SIZE = '(((LFS_BLOCK_SIZE-8)*(LFS_BLOCK_COUNT-4)) / 3)'
+define.SIZE = '(((LFS2_BLOCK_SIZE-8)*(LFS2_BLOCK_COUNT-4)) / 3)'
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
-    lfs_file_open(&lfs, &file, "padding", LFS_O_WRONLY | LFS_O_CREAT);
+    lfs2_file_open(&lfs2, &file, "padding", LFS2_O_WRONLY | LFS2_O_CREAT);
     size = strlen("buffering");
     memcpy(buffer, "buffering", size);
     for (int i = 0; i < SIZE; i += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_remove(&lfs, "padding") => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_remove(&lfs2, "padding") => 0;
 
-    lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
+    lfs2_file_open(&lfs2, &file, "exhaustion", LFS2_O_WRONLY | LFS2_O_CREAT);
     size = strlen("exhaustion");
     memcpy(buffer, "exhaustion", size);
-    lfs_file_write(&lfs, &file, buffer, size) => size;
-    lfs_file_sync(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, buffer, size) => size;
+    lfs2_file_sync(&lfs2, &file) => 0;
 
     size = strlen("blahblahblahblah");
     memcpy(buffer, "blahblahblahblah", size);
-    lfs_ssize_t res;
+    lfs2_ssize_t res;
     while (true) {
-        res = lfs_file_write(&lfs, &file, buffer, size);
+        res = lfs2_file_write(&lfs2, &file, buffer, size);
         if (res < 0) {
             break;
         }
 
         res => size;
     }
-    res => LFS_ERR_NOSPC;
+    res => LFS2_ERR_NOSPC;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "exhaustion", LFS_O_RDONLY);
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "exhaustion", LFS2_O_RDONLY);
     size = strlen("exhaustion");
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     memcmp(buffer, "exhaustion", size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_remove(&lfs, "exhaustion") => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_remove(&lfs2, "exhaustion") => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # dir exhaustion test
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     // find out max file size
-    lfs_mkdir(&lfs, "exhaustiondir") => 0;
+    lfs2_mkdir(&lfs2, "exhaustiondir") => 0;
     size = strlen("blahblahblahblah");
     memcpy(buffer, "blahblahblahblah", size);
-    lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
+    lfs2_file_open(&lfs2, &file, "exhaustion", LFS2_O_WRONLY | LFS2_O_CREAT);
     int count = 0;
     while (true) {
-        err = lfs_file_write(&lfs, &file, buffer, size);
+        err = lfs2_file_write(&lfs2, &file, buffer, size);
         if (err < 0) {
             break;
         }
 
         count += 1;
     }
-    err => LFS_ERR_NOSPC;
-    lfs_file_close(&lfs, &file) => 0;
+    err => LFS2_ERR_NOSPC;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_remove(&lfs, "exhaustion") => 0;
-    lfs_remove(&lfs, "exhaustiondir") => 0;
+    lfs2_remove(&lfs2, "exhaustion") => 0;
+    lfs2_remove(&lfs2, "exhaustiondir") => 0;
 
     // see if dir fits with max file size
-    lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
+    lfs2_file_open(&lfs2, &file, "exhaustion", LFS2_O_WRONLY | LFS2_O_CREAT);
     for (int i = 0; i < count; i++) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_mkdir(&lfs, "exhaustiondir") => 0;
-    lfs_remove(&lfs, "exhaustiondir") => 0;
-    lfs_remove(&lfs, "exhaustion") => 0;
+    lfs2_mkdir(&lfs2, "exhaustiondir") => 0;
+    lfs2_remove(&lfs2, "exhaustiondir") => 0;
+    lfs2_remove(&lfs2, "exhaustion") => 0;
 
     // see if dir fits with > max file size
-    lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
+    lfs2_file_open(&lfs2, &file, "exhaustion", LFS2_O_WRONLY | LFS2_O_CREAT);
     for (int i = 0; i < count+1; i++) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_mkdir(&lfs, "exhaustiondir") => LFS_ERR_NOSPC;
+    lfs2_mkdir(&lfs2, "exhaustiondir") => LFS2_ERR_NOSPC;
 
-    lfs_remove(&lfs, "exhaustion") => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_remove(&lfs2, "exhaustion") => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
+[[case]] # what if we have a bad block during an allocation scan?
+in = "lfs2.c"
+define.LFS2_ERASE_CYCLES = 0xffffffff
+define.LFS2_BADBLOCK_BEHAVIOR = 'LFS2_TESTBD_BADBLOCK_READERROR'
+code = '''
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    // first fill to exhaustion to find available space
+    lfs2_file_open(&lfs2, &file, "pacman", LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    strcpy((char*)buffer, "waka");
+    size = strlen("waka");
+    lfs2_size_t filesize = 0;
+    while (true) {
+        lfs2_ssize_t res = lfs2_file_write(&lfs2, &file, buffer, size);
+        assert(res == (lfs2_ssize_t)size || res == LFS2_ERR_NOSPC);
+        if (res == LFS2_ERR_NOSPC) {
+            break;
+        }
+        filesize += size;
+    }
+    lfs2_file_close(&lfs2, &file) => 0;
+    // now fill all but a couple of blocks of the filesystem with data
+    filesize -= 3*LFS2_BLOCK_SIZE;
+    lfs2_file_open(&lfs2, &file, "pacman", LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    strcpy((char*)buffer, "waka");
+    size = strlen("waka");
+    for (lfs2_size_t i = 0; i < filesize/size; i++) {
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
+    }
+    lfs2_file_close(&lfs2, &file) => 0;
+    // also save head of file so we can error during lookahead scan
+    lfs2_block_t fileblock = file.ctz.head;
+    lfs2_unmount(&lfs2) => 0;
+
+    // remount to force an alloc scan
+    lfs2_mount(&lfs2, &cfg) => 0;
+
+    // but mark the head of our file as a "bad block", this is force our
+    // scan to bail early
+    lfs2_testbd_setwear(&cfg, fileblock, 0xffffffff) => 0;
+    lfs2_file_open(&lfs2, &file, "ghost", LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    strcpy((char*)buffer, "chomp");
+    size = strlen("chomp");
+    while (true) {
+        lfs2_ssize_t res = lfs2_file_write(&lfs2, &file, buffer, size);
+        assert(res == (lfs2_ssize_t)size || res == LFS2_ERR_CORRUPT);
+        if (res == LFS2_ERR_CORRUPT) {
+            break;
+        }
+    }
+    lfs2_file_close(&lfs2, &file) => 0;
+
+    // now reverse the "bad block" and try to write the file again until we
+    // run out of space
+    lfs2_testbd_setwear(&cfg, fileblock, 0) => 0;
+    lfs2_file_open(&lfs2, &file, "ghost", LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    strcpy((char*)buffer, "chomp");
+    size = strlen("chomp");
+    while (true) {
+        lfs2_ssize_t res = lfs2_file_write(&lfs2, &file, buffer, size);
+        assert(res == (lfs2_ssize_t)size || res == LFS2_ERR_NOSPC);
+        if (res == LFS2_ERR_NOSPC) {
+            break;
+        }
+    }
+    lfs2_file_close(&lfs2, &file) => 0;
+
+    lfs2_unmount(&lfs2) => 0;
+
+    // check that the disk isn't hurt
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "pacman", LFS2_O_RDONLY) => 0;
+    strcpy((char*)buffer, "waka");
+    size = strlen("waka");
+    for (lfs2_size_t i = 0; i < filesize/size; i++) {
+        uint8_t rbuffer[4];
+        lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
+        assert(memcmp(rbuffer, buffer, size) == 0);
+    }
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
+'''
+
+
 # Below, I don't like these tests. They're fragile and depend _heavily_
 # on the geometry of the block device. But they are valuable. Eventually they
 # should be removed and replaced with generalized tests.
 
 [[case]] # chained dir exhaustion test
-define.LFS_BLOCK_SIZE = 512
-define.LFS_BLOCK_COUNT = 1024
-if = 'LFS_BLOCK_SIZE == 512 && LFS_BLOCK_COUNT == 1024'
+define.LFS2_BLOCK_SIZE = 512
+define.LFS2_BLOCK_COUNT = 1024
+if = 'LFS2_BLOCK_SIZE == 512 && LFS2_BLOCK_COUNT == 1024'
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     // find out max file size
-    lfs_mkdir(&lfs, "exhaustiondir") => 0;
+    lfs2_mkdir(&lfs2, "exhaustiondir") => 0;
     for (int i = 0; i < 10; i++) {
         sprintf(path, "dirwithanexhaustivelylongnameforpadding%d", i);
-        lfs_mkdir(&lfs, path) => 0;
+        lfs2_mkdir(&lfs2, path) => 0;
     }
     size = strlen("blahblahblahblah");
     memcpy(buffer, "blahblahblahblah", size);
-    lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
+    lfs2_file_open(&lfs2, &file, "exhaustion", LFS2_O_WRONLY | LFS2_O_CREAT);
     int count = 0;
     while (true) {
-        err = lfs_file_write(&lfs, &file, buffer, size);
+        err = lfs2_file_write(&lfs2, &file, buffer, size);
         if (err < 0) {
             break;
         }
 
         count += 1;
     }
-    err => LFS_ERR_NOSPC;
-    lfs_file_close(&lfs, &file) => 0;
+    err => LFS2_ERR_NOSPC;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_remove(&lfs, "exhaustion") => 0;
-    lfs_remove(&lfs, "exhaustiondir") => 0;
+    lfs2_remove(&lfs2, "exhaustion") => 0;
+    lfs2_remove(&lfs2, "exhaustiondir") => 0;
     for (int i = 0; i < 10; i++) {
         sprintf(path, "dirwithanexhaustivelylongnameforpadding%d", i);
-        lfs_remove(&lfs, path) => 0;
+        lfs2_remove(&lfs2, path) => 0;
     }
 
     // see that chained dir fails
-    lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
+    lfs2_file_open(&lfs2, &file, "exhaustion", LFS2_O_WRONLY | LFS2_O_CREAT);
     for (int i = 0; i < count+1; i++) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_sync(&lfs, &file) => 0;
+    lfs2_file_sync(&lfs2, &file) => 0;
 
     for (int i = 0; i < 10; i++) {
         sprintf(path, "dirwithanexhaustivelylongnameforpadding%d", i);
-        lfs_mkdir(&lfs, path) => 0;
+        lfs2_mkdir(&lfs2, path) => 0;
     }
 
-    lfs_mkdir(&lfs, "exhaustiondir") => LFS_ERR_NOSPC;
+    lfs2_mkdir(&lfs2, "exhaustiondir") => LFS2_ERR_NOSPC;
 
     // shorten file to try a second chained dir
     while (true) {
-        err = lfs_mkdir(&lfs, "exhaustiondir");
-        if (err != LFS_ERR_NOSPC) {
+        err = lfs2_mkdir(&lfs2, "exhaustiondir");
+        if (err != LFS2_ERR_NOSPC) {
             break;
         }
 
-        lfs_ssize_t filesize = lfs_file_size(&lfs, &file);
+        lfs2_ssize_t filesize = lfs2_file_size(&lfs2, &file);
         filesize > 0 => true;
 
-        lfs_file_truncate(&lfs, &file, filesize - size) => 0;
-        lfs_file_sync(&lfs, &file) => 0;
+        lfs2_file_truncate(&lfs2, &file, filesize - size) => 0;
+        lfs2_file_sync(&lfs2, &file) => 0;
     }
     err => 0;
 
-    lfs_mkdir(&lfs, "exhaustiondir2") => LFS_ERR_NOSPC;
+    lfs2_mkdir(&lfs2, "exhaustiondir2") => LFS2_ERR_NOSPC;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # split dir test
-define.LFS_BLOCK_SIZE = 512
-define.LFS_BLOCK_COUNT = 1024
-if = 'LFS_BLOCK_SIZE == 512 && LFS_BLOCK_COUNT == 1024'
+define.LFS2_BLOCK_SIZE = 512
+define.LFS2_BLOCK_COUNT = 1024
+if = 'LFS2_BLOCK_SIZE == 512 && LFS2_BLOCK_COUNT == 1024'
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     // create one block hole for half a directory
-    lfs_file_open(&lfs, &file, "bump", LFS_O_WRONLY | LFS_O_CREAT) => 0;
-    for (lfs_size_t i = 0; i < cfg.block_size; i += 2) {
+    lfs2_file_open(&lfs2, &file, "bump", LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    for (lfs2_size_t i = 0; i < cfg.block_size; i += 2) {
         memcpy(&buffer[i], "hi", 2);
     }
-    lfs_file_write(&lfs, &file, buffer, cfg.block_size) => cfg.block_size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, buffer, cfg.block_size) => cfg.block_size;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
+    lfs2_file_open(&lfs2, &file, "exhaustion", LFS2_O_WRONLY | LFS2_O_CREAT);
     size = strlen("blahblahblahblah");
     memcpy(buffer, "blahblahblahblah", size);
-    for (lfs_size_t i = 0;
+    for (lfs2_size_t i = 0;
             i < (cfg.block_count-4)*(cfg.block_size-8);
             i += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // remount to force reset of lookahead
-    lfs_unmount(&lfs) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_unmount(&lfs2) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     // open hole
-    lfs_remove(&lfs, "bump") => 0;
+    lfs2_remove(&lfs2, "bump") => 0;
 
-    lfs_mkdir(&lfs, "splitdir") => 0;
-    lfs_file_open(&lfs, &file, "splitdir/bump",
-            LFS_O_WRONLY | LFS_O_CREAT) => 0;
-    for (lfs_size_t i = 0; i < cfg.block_size; i += 2) {
+    lfs2_mkdir(&lfs2, "splitdir") => 0;
+    lfs2_file_open(&lfs2, &file, "splitdir/bump",
+            LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    for (lfs2_size_t i = 0; i < cfg.block_size; i += 2) {
         memcpy(&buffer[i], "hi", 2);
     }
-    lfs_file_write(&lfs, &file, buffer, 2*cfg.block_size) => LFS_ERR_NOSPC;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, buffer, 2*cfg.block_size) => LFS2_ERR_NOSPC;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # outdated lookahead test
-define.LFS_BLOCK_SIZE = 512
-define.LFS_BLOCK_COUNT = 1024
-if = 'LFS_BLOCK_SIZE == 512 && LFS_BLOCK_COUNT == 1024'
+define.LFS2_BLOCK_SIZE = 512
+define.LFS2_BLOCK_COUNT = 1024
+if = 'LFS2_BLOCK_SIZE == 512 && LFS2_BLOCK_COUNT == 1024'
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     // fill completely with two files
-    lfs_file_open(&lfs, &file, "exhaustion1",
-            LFS_O_WRONLY | LFS_O_CREAT) => 0;
+    lfs2_file_open(&lfs2, &file, "exhaustion1",
+            LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
     size = strlen("blahblahblahblah");
     memcpy(buffer, "blahblahblahblah", size);
-    for (lfs_size_t i = 0;
+    for (lfs2_size_t i = 0;
             i < ((cfg.block_count-2)/2)*(cfg.block_size-8);
             i += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_file_open(&lfs, &file, "exhaustion2",
-            LFS_O_WRONLY | LFS_O_CREAT) => 0;
+    lfs2_file_open(&lfs2, &file, "exhaustion2",
+            LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
     size = strlen("blahblahblahblah");
     memcpy(buffer, "blahblahblahblah", size);
-    for (lfs_size_t i = 0;
+    for (lfs2_size_t i = 0;
             i < ((cfg.block_count-2+1)/2)*(cfg.block_size-8);
             i += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // remount to force reset of lookahead
-    lfs_unmount(&lfs) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_unmount(&lfs2) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     // rewrite one file
-    lfs_file_open(&lfs, &file, "exhaustion1",
-            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
-    lfs_file_sync(&lfs, &file) => 0;
+    lfs2_file_open(&lfs2, &file, "exhaustion1",
+            LFS2_O_WRONLY | LFS2_O_TRUNC) => 0;
+    lfs2_file_sync(&lfs2, &file) => 0;
     size = strlen("blahblahblahblah");
     memcpy(buffer, "blahblahblahblah", size);
-    for (lfs_size_t i = 0;
+    for (lfs2_size_t i = 0;
             i < ((cfg.block_count-2)/2)*(cfg.block_size-8);
             i += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // rewrite second file, this requires lookahead does not
     // use old population
-    lfs_file_open(&lfs, &file, "exhaustion2",
-            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
-    lfs_file_sync(&lfs, &file) => 0;
+    lfs2_file_open(&lfs2, &file, "exhaustion2",
+            LFS2_O_WRONLY | LFS2_O_TRUNC) => 0;
+    lfs2_file_sync(&lfs2, &file) => 0;
     size = strlen("blahblahblahblah");
     memcpy(buffer, "blahblahblahblah", size);
-    for (lfs_size_t i = 0;
+    for (lfs2_size_t i = 0;
             i < ((cfg.block_count-2+1)/2)*(cfg.block_size-8);
             i += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # outdated lookahead and split dir test
-define.LFS_BLOCK_SIZE = 512
-define.LFS_BLOCK_COUNT = 1024
-if = 'LFS_BLOCK_SIZE == 512 && LFS_BLOCK_COUNT == 1024'
+define.LFS2_BLOCK_SIZE = 512
+define.LFS2_BLOCK_COUNT = 1024
+if = 'LFS2_BLOCK_SIZE == 512 && LFS2_BLOCK_COUNT == 1024'
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     // fill completely with two files
-    lfs_file_open(&lfs, &file, "exhaustion1",
-            LFS_O_WRONLY | LFS_O_CREAT) => 0;
+    lfs2_file_open(&lfs2, &file, "exhaustion1",
+            LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
     size = strlen("blahblahblahblah");
     memcpy(buffer, "blahblahblahblah", size);
-    for (lfs_size_t i = 0;
+    for (lfs2_size_t i = 0;
             i < ((cfg.block_count-2)/2)*(cfg.block_size-8);
             i += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_file_open(&lfs, &file, "exhaustion2",
-            LFS_O_WRONLY | LFS_O_CREAT) => 0;
+    lfs2_file_open(&lfs2, &file, "exhaustion2",
+            LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
     size = strlen("blahblahblahblah");
     memcpy(buffer, "blahblahblahblah", size);
-    for (lfs_size_t i = 0;
+    for (lfs2_size_t i = 0;
             i < ((cfg.block_count-2+1)/2)*(cfg.block_size-8);
             i += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // remount to force reset of lookahead
-    lfs_unmount(&lfs) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_unmount(&lfs2) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     // rewrite one file with a hole of one block
-    lfs_file_open(&lfs, &file, "exhaustion1",
-            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
-    lfs_file_sync(&lfs, &file) => 0;
+    lfs2_file_open(&lfs2, &file, "exhaustion1",
+            LFS2_O_WRONLY | LFS2_O_TRUNC) => 0;
+    lfs2_file_sync(&lfs2, &file) => 0;
     size = strlen("blahblahblahblah");
     memcpy(buffer, "blahblahblahblah", size);
-    for (lfs_size_t i = 0;
+    for (lfs2_size_t i = 0;
             i < ((cfg.block_count-2)/2 - 1)*(cfg.block_size-8);
             i += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // try to allocate a directory, should fail!
-    lfs_mkdir(&lfs, "split") => LFS_ERR_NOSPC;
+    lfs2_mkdir(&lfs2, "split") => LFS2_ERR_NOSPC;
 
     // file should not fail
-    lfs_file_open(&lfs, &file, "notasplit",
-            LFS_O_WRONLY | LFS_O_CREAT) => 0;
-    lfs_file_write(&lfs, &file, "hi", 2) => 2;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_open(&lfs2, &file, "notasplit",
+            LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    lfs2_file_write(&lfs2, &file, "hi", 2) => 2;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''

tests/test_attrs.toml

@@ -1,304 +1,304 @@
 [[case]] # set/get attribute
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "hello") => 0;
-    lfs_file_open(&lfs, &file, "hello/hello", LFS_O_WRONLY | LFS_O_CREAT) => 0;
-    lfs_file_write(&lfs, &file, "hello", strlen("hello")) => strlen("hello");
-    lfs_file_close(&lfs, &file);
-    lfs_unmount(&lfs) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "hello") => 0;
+    lfs2_file_open(&lfs2, &file, "hello/hello", LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    lfs2_file_write(&lfs2, &file, "hello", strlen("hello")) => strlen("hello");
+    lfs2_file_close(&lfs2, &file);
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     memset(buffer, 0, sizeof(buffer));
-    lfs_setattr(&lfs, "hello", 'A', "aaaa",   4) => 0;
-    lfs_setattr(&lfs, "hello", 'B', "bbbbbb", 6) => 0;
-    lfs_setattr(&lfs, "hello", 'C', "ccccc",  5) => 0;
-    lfs_getattr(&lfs, "hello", 'A', buffer,    4) => 4;
-    lfs_getattr(&lfs, "hello", 'B', buffer+4,  6) => 6;
-    lfs_getattr(&lfs, "hello", 'C', buffer+10, 5) => 5;
+    lfs2_setattr(&lfs2, "hello", 'A', "aaaa",   4) => 0;
+    lfs2_setattr(&lfs2, "hello", 'B', "bbbbbb", 6) => 0;
+    lfs2_setattr(&lfs2, "hello", 'C', "ccccc",  5) => 0;
+    lfs2_getattr(&lfs2, "hello", 'A', buffer,    4) => 4;
+    lfs2_getattr(&lfs2, "hello", 'B', buffer+4,  6) => 6;
+    lfs2_getattr(&lfs2, "hello", 'C', buffer+10, 5) => 5;
     memcmp(buffer,    "aaaa",   4) => 0;
     memcmp(buffer+4,  "bbbbbb", 6) => 0;
     memcmp(buffer+10, "ccccc",  5) => 0;
 
-    lfs_setattr(&lfs, "hello", 'B', "", 0) => 0;
-    lfs_getattr(&lfs, "hello", 'A', buffer,    4) => 4;
-    lfs_getattr(&lfs, "hello", 'B', buffer+4,  6) => 0;
-    lfs_getattr(&lfs, "hello", 'C', buffer+10, 5) => 5;
+    lfs2_setattr(&lfs2, "hello", 'B', "", 0) => 0;
+    lfs2_getattr(&lfs2, "hello", 'A', buffer,    4) => 4;
+    lfs2_getattr(&lfs2, "hello", 'B', buffer+4,  6) => 0;
+    lfs2_getattr(&lfs2, "hello", 'C', buffer+10, 5) => 5;
     memcmp(buffer,    "aaaa",         4) => 0;
     memcmp(buffer+4,  "\0\0\0\0\0\0", 6) => 0;
     memcmp(buffer+10, "ccccc",        5) => 0;
 
-    lfs_removeattr(&lfs, "hello", 'B') => 0;
-    lfs_getattr(&lfs, "hello", 'A', buffer,    4) => 4;
-    lfs_getattr(&lfs, "hello", 'B', buffer+4,  6) => LFS_ERR_NOATTR;
-    lfs_getattr(&lfs, "hello", 'C', buffer+10, 5) => 5;
+    lfs2_removeattr(&lfs2, "hello", 'B') => 0;
+    lfs2_getattr(&lfs2, "hello", 'A', buffer,    4) => 4;
+    lfs2_getattr(&lfs2, "hello", 'B', buffer+4,  6) => LFS2_ERR_NOATTR;
+    lfs2_getattr(&lfs2, "hello", 'C', buffer+10, 5) => 5;
     memcmp(buffer,    "aaaa",         4) => 0;
     memcmp(buffer+4,  "\0\0\0\0\0\0", 6) => 0;
     memcmp(buffer+10, "ccccc",        5) => 0;
 
-    lfs_setattr(&lfs, "hello", 'B', "dddddd", 6) => 0;
-    lfs_getattr(&lfs, "hello", 'A', buffer,    4) => 4;
-    lfs_getattr(&lfs, "hello", 'B', buffer+4,  6) => 6;
-    lfs_getattr(&lfs, "hello", 'C', buffer+10, 5) => 5;
+    lfs2_setattr(&lfs2, "hello", 'B', "dddddd", 6) => 0;
+    lfs2_getattr(&lfs2, "hello", 'A', buffer,    4) => 4;
+    lfs2_getattr(&lfs2, "hello", 'B', buffer+4,  6) => 6;
+    lfs2_getattr(&lfs2, "hello", 'C', buffer+10, 5) => 5;
     memcmp(buffer,    "aaaa",   4) => 0;
     memcmp(buffer+4,  "dddddd", 6) => 0;
     memcmp(buffer+10, "ccccc",  5) => 0;
 
-    lfs_setattr(&lfs, "hello", 'B', "eee", 3) => 0;
-    lfs_getattr(&lfs, "hello", 'A', buffer,    4) => 4;
-    lfs_getattr(&lfs, "hello", 'B', buffer+4,  6) => 3;
-    lfs_getattr(&lfs, "hello", 'C', buffer+10, 5) => 5;
+    lfs2_setattr(&lfs2, "hello", 'B', "eee", 3) => 0;
+    lfs2_getattr(&lfs2, "hello", 'A', buffer,    4) => 4;
+    lfs2_getattr(&lfs2, "hello", 'B', buffer+4,  6) => 3;
+    lfs2_getattr(&lfs2, "hello", 'C', buffer+10, 5) => 5;
     memcmp(buffer,    "aaaa",      4) => 0;
     memcmp(buffer+4,  "eee\0\0\0", 6) => 0;
     memcmp(buffer+10, "ccccc",     5) => 0;
 
-    lfs_setattr(&lfs, "hello", 'A', buffer, LFS_ATTR_MAX+1) => LFS_ERR_NOSPC;
-    lfs_setattr(&lfs, "hello", 'B', "fffffffff", 9) => 0;
-    lfs_getattr(&lfs, "hello", 'A', buffer,    4) => 4;
-    lfs_getattr(&lfs, "hello", 'B', buffer+4,  6) => 9;
-    lfs_getattr(&lfs, "hello", 'C', buffer+10, 5) => 5;
+    lfs2_setattr(&lfs2, "hello", 'A', buffer, LFS2_ATTR_MAX+1) => LFS2_ERR_NOSPC;
+    lfs2_setattr(&lfs2, "hello", 'B', "fffffffff", 9) => 0;
+    lfs2_getattr(&lfs2, "hello", 'A', buffer,    4) => 4;
+    lfs2_getattr(&lfs2, "hello", 'B', buffer+4,  6) => 9;
+    lfs2_getattr(&lfs2, "hello", 'C', buffer+10, 5) => 5;
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     memset(buffer, 0, sizeof(buffer));
-    lfs_getattr(&lfs, "hello", 'A', buffer,    4) => 4;
-    lfs_getattr(&lfs, "hello", 'B', buffer+4,  9) => 9;
-    lfs_getattr(&lfs, "hello", 'C', buffer+13, 5) => 5;
+    lfs2_getattr(&lfs2, "hello", 'A', buffer,    4) => 4;
+    lfs2_getattr(&lfs2, "hello", 'B', buffer+4,  9) => 9;
+    lfs2_getattr(&lfs2, "hello", 'C', buffer+13, 5) => 5;
     memcmp(buffer,    "aaaa",      4) => 0;
     memcmp(buffer+4,  "fffffffff", 9) => 0;
     memcmp(buffer+13, "ccccc",     5) => 0;
 
-    lfs_file_open(&lfs, &file, "hello/hello", LFS_O_RDONLY) => 0;
-    lfs_file_read(&lfs, &file, buffer, sizeof(buffer)) => strlen("hello");
+    lfs2_file_open(&lfs2, &file, "hello/hello", LFS2_O_RDONLY) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, sizeof(buffer)) => strlen("hello");
     memcmp(buffer, "hello", strlen("hello")) => 0;
-    lfs_file_close(&lfs, &file);
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file);
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # set/get root attribute
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "hello") => 0;
-    lfs_file_open(&lfs, &file, "hello/hello", LFS_O_WRONLY | LFS_O_CREAT) => 0;
-    lfs_file_write(&lfs, &file, "hello", strlen("hello")) => strlen("hello");
-    lfs_file_close(&lfs, &file);
-    lfs_unmount(&lfs) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "hello") => 0;
+    lfs2_file_open(&lfs2, &file, "hello/hello", LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    lfs2_file_write(&lfs2, &file, "hello", strlen("hello")) => strlen("hello");
+    lfs2_file_close(&lfs2, &file);
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     memset(buffer, 0, sizeof(buffer));
-    lfs_setattr(&lfs, "/", 'A', "aaaa",   4) => 0;
-    lfs_setattr(&lfs, "/", 'B', "bbbbbb", 6) => 0;
-    lfs_setattr(&lfs, "/", 'C', "ccccc",  5) => 0;
-    lfs_getattr(&lfs, "/", 'A', buffer,    4) => 4;
-    lfs_getattr(&lfs, "/", 'B', buffer+4,  6) => 6;
-    lfs_getattr(&lfs, "/", 'C', buffer+10, 5) => 5;
+    lfs2_setattr(&lfs2, "/", 'A', "aaaa",   4) => 0;
+    lfs2_setattr(&lfs2, "/", 'B', "bbbbbb", 6) => 0;
+    lfs2_setattr(&lfs2, "/", 'C', "ccccc",  5) => 0;
+    lfs2_getattr(&lfs2, "/", 'A', buffer,    4) => 4;
+    lfs2_getattr(&lfs2, "/", 'B', buffer+4,  6) => 6;
+    lfs2_getattr(&lfs2, "/", 'C', buffer+10, 5) => 5;
     memcmp(buffer,    "aaaa",   4) => 0;
     memcmp(buffer+4,  "bbbbbb", 6) => 0;
     memcmp(buffer+10, "ccccc",  5) => 0;
 
-    lfs_setattr(&lfs, "/", 'B', "", 0) => 0;
-    lfs_getattr(&lfs, "/", 'A', buffer,    4) => 4;
-    lfs_getattr(&lfs, "/", 'B', buffer+4,  6) => 0;
-    lfs_getattr(&lfs, "/", 'C', buffer+10, 5) => 5;
+    lfs2_setattr(&lfs2, "/", 'B', "", 0) => 0;
+    lfs2_getattr(&lfs2, "/", 'A', buffer,    4) => 4;
+    lfs2_getattr(&lfs2, "/", 'B', buffer+4,  6) => 0;
+    lfs2_getattr(&lfs2, "/", 'C', buffer+10, 5) => 5;
     memcmp(buffer,    "aaaa",         4) => 0;
     memcmp(buffer+4,  "\0\0\0\0\0\0", 6) => 0;
     memcmp(buffer+10, "ccccc",        5) => 0;
 
-    lfs_removeattr(&lfs, "/", 'B') => 0;
-    lfs_getattr(&lfs, "/", 'A', buffer,    4) => 4;
-    lfs_getattr(&lfs, "/", 'B', buffer+4,  6) => LFS_ERR_NOATTR;
-    lfs_getattr(&lfs, "/", 'C', buffer+10, 5) => 5;
+    lfs2_removeattr(&lfs2, "/", 'B') => 0;
+    lfs2_getattr(&lfs2, "/", 'A', buffer,    4) => 4;
+    lfs2_getattr(&lfs2, "/", 'B', buffer+4,  6) => LFS2_ERR_NOATTR;
+    lfs2_getattr(&lfs2, "/", 'C', buffer+10, 5) => 5;
     memcmp(buffer,    "aaaa",         4) => 0;
     memcmp(buffer+4,  "\0\0\0\0\0\0", 6) => 0;
     memcmp(buffer+10, "ccccc",        5) => 0;
 
-    lfs_setattr(&lfs, "/", 'B', "dddddd", 6) => 0;
-    lfs_getattr(&lfs, "/", 'A', buffer,    4) => 4;
-    lfs_getattr(&lfs, "/", 'B', buffer+4,  6) => 6;
-    lfs_getattr(&lfs, "/", 'C', buffer+10, 5) => 5;
+    lfs2_setattr(&lfs2, "/", 'B', "dddddd", 6) => 0;
+    lfs2_getattr(&lfs2, "/", 'A', buffer,    4) => 4;
+    lfs2_getattr(&lfs2, "/", 'B', buffer+4,  6) => 6;
+    lfs2_getattr(&lfs2, "/", 'C', buffer+10, 5) => 5;
     memcmp(buffer,    "aaaa",   4) => 0;
     memcmp(buffer+4,  "dddddd", 6) => 0;
     memcmp(buffer+10, "ccccc",  5) => 0;
 
-    lfs_setattr(&lfs, "/", 'B', "eee", 3) => 0;
-    lfs_getattr(&lfs, "/", 'A', buffer,    4) => 4;
-    lfs_getattr(&lfs, "/", 'B', buffer+4,  6) => 3;
-    lfs_getattr(&lfs, "/", 'C', buffer+10, 5) => 5;
+    lfs2_setattr(&lfs2, "/", 'B', "eee", 3) => 0;
+    lfs2_getattr(&lfs2, "/", 'A', buffer,    4) => 4;
+    lfs2_getattr(&lfs2, "/", 'B', buffer+4,  6) => 3;
+    lfs2_getattr(&lfs2, "/", 'C', buffer+10, 5) => 5;
     memcmp(buffer,    "aaaa",      4) => 0;
     memcmp(buffer+4,  "eee\0\0\0", 6) => 0;
     memcmp(buffer+10, "ccccc",     5) => 0;
 
-    lfs_setattr(&lfs, "/", 'A', buffer, LFS_ATTR_MAX+1) => LFS_ERR_NOSPC;
-    lfs_setattr(&lfs, "/", 'B', "fffffffff", 9) => 0;
-    lfs_getattr(&lfs, "/", 'A', buffer,    4) => 4;
-    lfs_getattr(&lfs, "/", 'B', buffer+4,  6) => 9;
-    lfs_getattr(&lfs, "/", 'C', buffer+10, 5) => 5;
-    lfs_unmount(&lfs) => 0;
+    lfs2_setattr(&lfs2, "/", 'A', buffer, LFS2_ATTR_MAX+1) => LFS2_ERR_NOSPC;
+    lfs2_setattr(&lfs2, "/", 'B', "fffffffff", 9) => 0;
+    lfs2_getattr(&lfs2, "/", 'A', buffer,    4) => 4;
+    lfs2_getattr(&lfs2, "/", 'B', buffer+4,  6) => 9;
+    lfs2_getattr(&lfs2, "/", 'C', buffer+10, 5) => 5;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     memset(buffer, 0, sizeof(buffer));
-    lfs_getattr(&lfs, "/", 'A', buffer,    4) => 4;
-    lfs_getattr(&lfs, "/", 'B', buffer+4,  9) => 9;
-    lfs_getattr(&lfs, "/", 'C', buffer+13, 5) => 5;
+    lfs2_getattr(&lfs2, "/", 'A', buffer,    4) => 4;
+    lfs2_getattr(&lfs2, "/", 'B', buffer+4,  9) => 9;
+    lfs2_getattr(&lfs2, "/", 'C', buffer+13, 5) => 5;
     memcmp(buffer,    "aaaa",      4) => 0;
     memcmp(buffer+4,  "fffffffff", 9) => 0;
     memcmp(buffer+13, "ccccc",     5) => 0;
 
-    lfs_file_open(&lfs, &file, "hello/hello", LFS_O_RDONLY) => 0;
-    lfs_file_read(&lfs, &file, buffer, sizeof(buffer)) => strlen("hello");
+    lfs2_file_open(&lfs2, &file, "hello/hello", LFS2_O_RDONLY) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, sizeof(buffer)) => strlen("hello");
     memcmp(buffer, "hello", strlen("hello")) => 0;
-    lfs_file_close(&lfs, &file);
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file);
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # set/get file attribute
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "hello") => 0;
-    lfs_file_open(&lfs, &file, "hello/hello", LFS_O_WRONLY | LFS_O_CREAT) => 0;
-    lfs_file_write(&lfs, &file, "hello", strlen("hello")) => strlen("hello");
-    lfs_file_close(&lfs, &file);
-    lfs_unmount(&lfs) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "hello") => 0;
+    lfs2_file_open(&lfs2, &file, "hello/hello", LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    lfs2_file_write(&lfs2, &file, "hello", strlen("hello")) => strlen("hello");
+    lfs2_file_close(&lfs2, &file);
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     memset(buffer, 0, sizeof(buffer));
-    struct lfs_attr attrs1[] = {
+    struct lfs2_attr attrs1[] = {
         {'A', buffer,    4},
         {'B', buffer+4,  6},
         {'C', buffer+10, 5},
     };
-    struct lfs_file_config cfg1 = {.attrs=attrs1, .attr_count=3};
+    struct lfs2_file_config cfg1 = {.attrs=attrs1, .attr_count=3};
 
-    lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_WRONLY, &cfg1) => 0;
+    lfs2_file_opencfg(&lfs2, &file, "hello/hello", LFS2_O_WRONLY, &cfg1) => 0;
     memcpy(buffer,    "aaaa",   4);
     memcpy(buffer+4,  "bbbbbb", 6);
     memcpy(buffer+10, "ccccc",  5);
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     memset(buffer, 0, 15);
-    lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_RDONLY, &cfg1) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_opencfg(&lfs2, &file, "hello/hello", LFS2_O_RDONLY, &cfg1) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     memcmp(buffer,    "aaaa",   4) => 0;
     memcmp(buffer+4,  "bbbbbb", 6) => 0;
     memcmp(buffer+10, "ccccc",  5) => 0;
 
     attrs1[1].size = 0;
-    lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_WRONLY, &cfg1) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_opencfg(&lfs2, &file, "hello/hello", LFS2_O_WRONLY, &cfg1) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     memset(buffer, 0, 15);
     attrs1[1].size = 6;
-    lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_RDONLY, &cfg1) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_opencfg(&lfs2, &file, "hello/hello", LFS2_O_RDONLY, &cfg1) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     memcmp(buffer,    "aaaa",         4) => 0;
     memcmp(buffer+4,  "\0\0\0\0\0\0", 6) => 0;
     memcmp(buffer+10, "ccccc",        5) => 0;
 
     attrs1[1].size = 6;
-    lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_WRONLY, &cfg1) => 0;
+    lfs2_file_opencfg(&lfs2, &file, "hello/hello", LFS2_O_WRONLY, &cfg1) => 0;
     memcpy(buffer+4,  "dddddd", 6);
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     memset(buffer, 0, 15);
     attrs1[1].size = 6;
-    lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_RDONLY, &cfg1) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_opencfg(&lfs2, &file, "hello/hello", LFS2_O_RDONLY, &cfg1) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     memcmp(buffer,    "aaaa",   4) => 0;
     memcmp(buffer+4,  "dddddd", 6) => 0;
     memcmp(buffer+10, "ccccc",  5) => 0;
 
     attrs1[1].size = 3;
-    lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_WRONLY, &cfg1) => 0;
+    lfs2_file_opencfg(&lfs2, &file, "hello/hello", LFS2_O_WRONLY, &cfg1) => 0;
     memcpy(buffer+4,  "eee", 3);
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     memset(buffer, 0, 15);
     attrs1[1].size = 6;
-    lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_RDONLY, &cfg1) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_opencfg(&lfs2, &file, "hello/hello", LFS2_O_RDONLY, &cfg1) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     memcmp(buffer,    "aaaa",      4) => 0;
     memcmp(buffer+4,  "eee\0\0\0", 6) => 0;
     memcmp(buffer+10, "ccccc",     5) => 0;
 
-    attrs1[0].size = LFS_ATTR_MAX+1;
-    lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_WRONLY, &cfg1)
-        => LFS_ERR_NOSPC;
+    attrs1[0].size = LFS2_ATTR_MAX+1;
+    lfs2_file_opencfg(&lfs2, &file, "hello/hello", LFS2_O_WRONLY, &cfg1)
+        => LFS2_ERR_NOSPC;
 
-    struct lfs_attr attrs2[] = {
+    struct lfs2_attr attrs2[] = {
         {'A', buffer,    4},
         {'B', buffer+4,  9},
         {'C', buffer+13, 5},
     };
-    struct lfs_file_config cfg2 = {.attrs=attrs2, .attr_count=3};
-    lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_RDWR, &cfg2) => 0;
+    struct lfs2_file_config cfg2 = {.attrs=attrs2, .attr_count=3};
+    lfs2_file_opencfg(&lfs2, &file, "hello/hello", LFS2_O_RDWR, &cfg2) => 0;
     memcpy(buffer+4,  "fffffffff", 9);
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     attrs1[0].size = 4;
-    lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_RDONLY, &cfg1) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_opencfg(&lfs2, &file, "hello/hello", LFS2_O_RDONLY, &cfg1) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     memset(buffer, 0, sizeof(buffer));
-    struct lfs_attr attrs3[] = {
+    struct lfs2_attr attrs3[] = {
         {'A', buffer,    4},
         {'B', buffer+4,  9},
         {'C', buffer+13, 5},
     };
-    struct lfs_file_config cfg3 = {.attrs=attrs3, .attr_count=3};
+    struct lfs2_file_config cfg3 = {.attrs=attrs3, .attr_count=3};
 
-    lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_RDONLY, &cfg3) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_opencfg(&lfs2, &file, "hello/hello", LFS2_O_RDONLY, &cfg3) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     memcmp(buffer,    "aaaa",      4) => 0;
     memcmp(buffer+4,  "fffffffff", 9) => 0;
     memcmp(buffer+13, "ccccc",     5) => 0;
 
-    lfs_file_open(&lfs, &file, "hello/hello", LFS_O_RDONLY) => 0;
-    lfs_file_read(&lfs, &file, buffer, sizeof(buffer)) => strlen("hello");
+    lfs2_file_open(&lfs2, &file, "hello/hello", LFS2_O_RDONLY) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, sizeof(buffer)) => strlen("hello");
     memcmp(buffer, "hello", strlen("hello")) => 0;
-    lfs_file_close(&lfs, &file);
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file);
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # deferred file attributes
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "hello") => 0;
-    lfs_file_open(&lfs, &file, "hello/hello", LFS_O_WRONLY | LFS_O_CREAT) => 0;
-    lfs_file_write(&lfs, &file, "hello", strlen("hello")) => strlen("hello");
-    lfs_file_close(&lfs, &file);
-    lfs_unmount(&lfs) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "hello") => 0;
+    lfs2_file_open(&lfs2, &file, "hello/hello", LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    lfs2_file_write(&lfs2, &file, "hello", strlen("hello")) => strlen("hello");
+    lfs2_file_close(&lfs2, &file);
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_setattr(&lfs, "hello/hello", 'B', "fffffffff",  9) => 0;
-    lfs_setattr(&lfs, "hello/hello", 'C', "ccccc",      5) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_setattr(&lfs2, "hello/hello", 'B', "fffffffff",  9) => 0;
+    lfs2_setattr(&lfs2, "hello/hello", 'C', "ccccc",      5) => 0;
 
     memset(buffer, 0, sizeof(buffer));
-    struct lfs_attr attrs1[] = {
+    struct lfs2_attr attrs1[] = {
         {'B', "gggg", 4},
         {'C', "",     0},
         {'D', "hhhh", 4},
     };
-    struct lfs_file_config cfg1 = {.attrs=attrs1, .attr_count=3};
+    struct lfs2_file_config cfg1 = {.attrs=attrs1, .attr_count=3};
 
-    lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_WRONLY, &cfg1) => 0;
+    lfs2_file_opencfg(&lfs2, &file, "hello/hello", LFS2_O_WRONLY, &cfg1) => 0;
 
-    lfs_getattr(&lfs, "hello/hello", 'B', buffer,    9) => 9;
-    lfs_getattr(&lfs, "hello/hello", 'C', buffer+9,  9) => 5;
-    lfs_getattr(&lfs, "hello/hello", 'D', buffer+18, 9) => LFS_ERR_NOATTR;
+    lfs2_getattr(&lfs2, "hello/hello", 'B', buffer,    9) => 9;
+    lfs2_getattr(&lfs2, "hello/hello", 'C', buffer+9,  9) => 5;
+    lfs2_getattr(&lfs2, "hello/hello", 'D', buffer+18, 9) => LFS2_ERR_NOATTR;
     memcmp(buffer,    "fffffffff",          9) => 0;
     memcmp(buffer+9,  "ccccc\0\0\0\0",      9) => 0;
     memcmp(buffer+18, "\0\0\0\0\0\0\0\0\0", 9) => 0;
 
-    lfs_file_sync(&lfs, &file) => 0;
-    lfs_getattr(&lfs, "hello/hello", 'B', buffer,    9) => 4;
-    lfs_getattr(&lfs, "hello/hello", 'C', buffer+9,  9) => 0;
-    lfs_getattr(&lfs, "hello/hello", 'D', buffer+18, 9) => 4;
+    lfs2_file_sync(&lfs2, &file) => 0;
+    lfs2_getattr(&lfs2, "hello/hello", 'B', buffer,    9) => 4;
+    lfs2_getattr(&lfs2, "hello/hello", 'C', buffer+9,  9) => 0;
+    lfs2_getattr(&lfs2, "hello/hello", 'D', buffer+18, 9) => 4;
     memcmp(buffer,    "gggg\0\0\0\0\0",     9) => 0;
     memcmp(buffer+9,  "\0\0\0\0\0\0\0\0\0", 9) => 0;
     memcmp(buffer+18, "hhhh\0\0\0\0\0",     9) => 0;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''

tests/test_badblocks.toml

@@ -1,241 +1,241 @@
 # bad blocks with block cycles should be tested in test_relocations
-if = 'LFS_BLOCK_CYCLES == -1'
+if = 'LFS2_BLOCK_CYCLES == -1'
 
 [[case]] # single bad blocks
-define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
-define.LFS_ERASE_CYCLES = 0xffffffff
-define.LFS_ERASE_VALUE = [0x00, 0xff, -1]
-define.LFS_BADBLOCK_BEHAVIOR = [
-    'LFS_TESTBD_BADBLOCK_PROGERROR',
-    'LFS_TESTBD_BADBLOCK_ERASEERROR',
-    'LFS_TESTBD_BADBLOCK_READERROR',
-    'LFS_TESTBD_BADBLOCK_PROGNOOP',
-    'LFS_TESTBD_BADBLOCK_ERASENOOP',
+define.LFS2_BLOCK_COUNT = 256 # small bd so test runs faster
+define.LFS2_ERASE_CYCLES = 0xffffffff
+define.LFS2_ERASE_VALUE = [0x00, 0xff, -1]
+define.LFS2_BADBLOCK_BEHAVIOR = [
+    'LFS2_TESTBD_BADBLOCK_PROGERROR',
+    'LFS2_TESTBD_BADBLOCK_ERASEERROR',
+    'LFS2_TESTBD_BADBLOCK_READERROR',
+    'LFS2_TESTBD_BADBLOCK_PROGNOOP',
+    'LFS2_TESTBD_BADBLOCK_ERASENOOP',
 ]
 define.NAMEMULT = 64
 define.FILEMULT = 1
 code = '''
-    for (lfs_block_t badblock = 2; badblock < LFS_BLOCK_COUNT; badblock++) {
-        lfs_testbd_setwear(&cfg, badblock-1, 0) => 0;
-        lfs_testbd_setwear(&cfg, badblock, 0xffffffff) => 0;
+    for (lfs2_block_t badblock = 2; badblock < LFS2_BLOCK_COUNT; badblock++) {
+        lfs2_testbd_setwear(&cfg, badblock-1, 0) => 0;
+        lfs2_testbd_setwear(&cfg, badblock, 0xffffffff) => 0;
         
-        lfs_format(&lfs, &cfg) => 0;
+        lfs2_format(&lfs2, &cfg) => 0;
 
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
         for (int i = 1; i < 10; i++) {
             for (int j = 0; j < NAMEMULT; j++) {
                 buffer[j] = '0'+i;
             }
             buffer[NAMEMULT] = '\0';
-            lfs_mkdir(&lfs, (char*)buffer) => 0;
+            lfs2_mkdir(&lfs2, (char*)buffer) => 0;
 
             buffer[NAMEMULT] = '/';
             for (int j = 0; j < NAMEMULT; j++) {
                 buffer[j+NAMEMULT+1] = '0'+i;
             }
             buffer[2*NAMEMULT+1] = '\0';
-            lfs_file_open(&lfs, &file, (char*)buffer,
-                    LFS_O_WRONLY | LFS_O_CREAT) => 0;
+            lfs2_file_open(&lfs2, &file, (char*)buffer,
+                    LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
             
             size = NAMEMULT;
             for (int j = 0; j < i*FILEMULT; j++) {
-                lfs_file_write(&lfs, &file, buffer, size) => size;
+                lfs2_file_write(&lfs2, &file, buffer, size) => size;
             }
 
-            lfs_file_close(&lfs, &file) => 0;
+            lfs2_file_close(&lfs2, &file) => 0;
         }
-        lfs_unmount(&lfs) => 0;
+        lfs2_unmount(&lfs2) => 0;
 
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
         for (int i = 1; i < 10; i++) {
             for (int j = 0; j < NAMEMULT; j++) {
                 buffer[j] = '0'+i;
             }
             buffer[NAMEMULT] = '\0';
-            lfs_stat(&lfs, (char*)buffer, &info) => 0;
-            info.type => LFS_TYPE_DIR;
+            lfs2_stat(&lfs2, (char*)buffer, &info) => 0;
+            info.type => LFS2_TYPE_DIR;
 
             buffer[NAMEMULT] = '/';
             for (int j = 0; j < NAMEMULT; j++) {
                 buffer[j+NAMEMULT+1] = '0'+i;
             }
             buffer[2*NAMEMULT+1] = '\0';
-            lfs_file_open(&lfs, &file, (char*)buffer, LFS_O_RDONLY) => 0;
+            lfs2_file_open(&lfs2, &file, (char*)buffer, LFS2_O_RDONLY) => 0;
             
             size = NAMEMULT;
             for (int j = 0; j < i*FILEMULT; j++) {
                 uint8_t rbuffer[1024];
-                lfs_file_read(&lfs, &file, rbuffer, size) => size;
+                lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
                 memcmp(buffer, rbuffer, size) => 0;
             }
 
-            lfs_file_close(&lfs, &file) => 0;
+            lfs2_file_close(&lfs2, &file) => 0;
         }
-        lfs_unmount(&lfs) => 0;
+        lfs2_unmount(&lfs2) => 0;
     }
 '''
 
 [[case]] # region corruption (causes cascading failures)
-define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
-define.LFS_ERASE_CYCLES = 0xffffffff
-define.LFS_ERASE_VALUE = [0x00, 0xff, -1]
-define.LFS_BADBLOCK_BEHAVIOR = [
-    'LFS_TESTBD_BADBLOCK_PROGERROR',
-    'LFS_TESTBD_BADBLOCK_ERASEERROR',
-    'LFS_TESTBD_BADBLOCK_READERROR',
-    'LFS_TESTBD_BADBLOCK_PROGNOOP',
-    'LFS_TESTBD_BADBLOCK_ERASENOOP',
+define.LFS2_BLOCK_COUNT = 256 # small bd so test runs faster
+define.LFS2_ERASE_CYCLES = 0xffffffff
+define.LFS2_ERASE_VALUE = [0x00, 0xff, -1]
+define.LFS2_BADBLOCK_BEHAVIOR = [
+    'LFS2_TESTBD_BADBLOCK_PROGERROR',
+    'LFS2_TESTBD_BADBLOCK_ERASEERROR',
+    'LFS2_TESTBD_BADBLOCK_READERROR',
+    'LFS2_TESTBD_BADBLOCK_PROGNOOP',
+    'LFS2_TESTBD_BADBLOCK_ERASENOOP',
 ]
 define.NAMEMULT = 64
 define.FILEMULT = 1
 code = '''
-    for (lfs_block_t i = 0; i < (LFS_BLOCK_COUNT-2)/2; i++) {
-        lfs_testbd_setwear(&cfg, i+2, 0xffffffff) => 0;
+    for (lfs2_block_t i = 0; i < (LFS2_BLOCK_COUNT-2)/2; i++) {
+        lfs2_testbd_setwear(&cfg, i+2, 0xffffffff) => 0;
     }
     
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (int i = 1; i < 10; i++) {
         for (int j = 0; j < NAMEMULT; j++) {
             buffer[j] = '0'+i;
         }
         buffer[NAMEMULT] = '\0';
-        lfs_mkdir(&lfs, (char*)buffer) => 0;
+        lfs2_mkdir(&lfs2, (char*)buffer) => 0;
 
         buffer[NAMEMULT] = '/';
         for (int j = 0; j < NAMEMULT; j++) {
             buffer[j+NAMEMULT+1] = '0'+i;
         }
         buffer[2*NAMEMULT+1] = '\0';
-        lfs_file_open(&lfs, &file, (char*)buffer,
-                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs2_file_open(&lfs2, &file, (char*)buffer,
+                LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
         
         size = NAMEMULT;
         for (int j = 0; j < i*FILEMULT; j++) {
-            lfs_file_write(&lfs, &file, buffer, size) => size;
+            lfs2_file_write(&lfs2, &file, buffer, size) => size;
         }
 
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (int i = 1; i < 10; i++) {
         for (int j = 0; j < NAMEMULT; j++) {
             buffer[j] = '0'+i;
         }
         buffer[NAMEMULT] = '\0';
-        lfs_stat(&lfs, (char*)buffer, &info) => 0;
-        info.type => LFS_TYPE_DIR;
+        lfs2_stat(&lfs2, (char*)buffer, &info) => 0;
+        info.type => LFS2_TYPE_DIR;
 
         buffer[NAMEMULT] = '/';
         for (int j = 0; j < NAMEMULT; j++) {
             buffer[j+NAMEMULT+1] = '0'+i;
         }
         buffer[2*NAMEMULT+1] = '\0';
-        lfs_file_open(&lfs, &file, (char*)buffer, LFS_O_RDONLY) => 0;
+        lfs2_file_open(&lfs2, &file, (char*)buffer, LFS2_O_RDONLY) => 0;
         
         size = NAMEMULT;
         for (int j = 0; j < i*FILEMULT; j++) {
             uint8_t rbuffer[1024];
-            lfs_file_read(&lfs, &file, rbuffer, size) => size;
+            lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
             memcmp(buffer, rbuffer, size) => 0;
         }
 
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # alternating corruption (causes cascading failures)
-define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
-define.LFS_ERASE_CYCLES = 0xffffffff
-define.LFS_ERASE_VALUE = [0x00, 0xff, -1]
-define.LFS_BADBLOCK_BEHAVIOR = [
-    'LFS_TESTBD_BADBLOCK_PROGERROR',
-    'LFS_TESTBD_BADBLOCK_ERASEERROR',
-    'LFS_TESTBD_BADBLOCK_READERROR',
-    'LFS_TESTBD_BADBLOCK_PROGNOOP',
-    'LFS_TESTBD_BADBLOCK_ERASENOOP',
+define.LFS2_BLOCK_COUNT = 256 # small bd so test runs faster
+define.LFS2_ERASE_CYCLES = 0xffffffff
+define.LFS2_ERASE_VALUE = [0x00, 0xff, -1]
+define.LFS2_BADBLOCK_BEHAVIOR = [
+    'LFS2_TESTBD_BADBLOCK_PROGERROR',
+    'LFS2_TESTBD_BADBLOCK_ERASEERROR',
+    'LFS2_TESTBD_BADBLOCK_READERROR',
+    'LFS2_TESTBD_BADBLOCK_PROGNOOP',
+    'LFS2_TESTBD_BADBLOCK_ERASENOOP',
 ]
 define.NAMEMULT = 64
 define.FILEMULT = 1
 code = '''
-    for (lfs_block_t i = 0; i < (LFS_BLOCK_COUNT-2)/2; i++) {
-        lfs_testbd_setwear(&cfg, (2*i) + 2, 0xffffffff) => 0;
+    for (lfs2_block_t i = 0; i < (LFS2_BLOCK_COUNT-2)/2; i++) {
+        lfs2_testbd_setwear(&cfg, (2*i) + 2, 0xffffffff) => 0;
     }
     
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (int i = 1; i < 10; i++) {
         for (int j = 0; j < NAMEMULT; j++) {
             buffer[j] = '0'+i;
         }
         buffer[NAMEMULT] = '\0';
-        lfs_mkdir(&lfs, (char*)buffer) => 0;
+        lfs2_mkdir(&lfs2, (char*)buffer) => 0;
 
         buffer[NAMEMULT] = '/';
         for (int j = 0; j < NAMEMULT; j++) {
             buffer[j+NAMEMULT+1] = '0'+i;
         }
         buffer[2*NAMEMULT+1] = '\0';
-        lfs_file_open(&lfs, &file, (char*)buffer,
-                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs2_file_open(&lfs2, &file, (char*)buffer,
+                LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
         
         size = NAMEMULT;
         for (int j = 0; j < i*FILEMULT; j++) {
-            lfs_file_write(&lfs, &file, buffer, size) => size;
+            lfs2_file_write(&lfs2, &file, buffer, size) => size;
         }
 
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (int i = 1; i < 10; i++) {
         for (int j = 0; j < NAMEMULT; j++) {
             buffer[j] = '0'+i;
         }
         buffer[NAMEMULT] = '\0';
-        lfs_stat(&lfs, (char*)buffer, &info) => 0;
-        info.type => LFS_TYPE_DIR;
+        lfs2_stat(&lfs2, (char*)buffer, &info) => 0;
+        info.type => LFS2_TYPE_DIR;
 
         buffer[NAMEMULT] = '/';
         for (int j = 0; j < NAMEMULT; j++) {
             buffer[j+NAMEMULT+1] = '0'+i;
         }
         buffer[2*NAMEMULT+1] = '\0';
-        lfs_file_open(&lfs, &file, (char*)buffer, LFS_O_RDONLY) => 0;
+        lfs2_file_open(&lfs2, &file, (char*)buffer, LFS2_O_RDONLY) => 0;
         
         size = NAMEMULT;
         for (int j = 0; j < i*FILEMULT; j++) {
             uint8_t rbuffer[1024];
-            lfs_file_read(&lfs, &file, rbuffer, size) => size;
+            lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
             memcmp(buffer, rbuffer, size) => 0;
         }
 
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 # other corner cases
 [[case]] # bad superblocks (corrupt 1 or 0)
-define.LFS_ERASE_CYCLES = 0xffffffff
-define.LFS_ERASE_VALUE = [0x00, 0xff, -1]
-define.LFS_BADBLOCK_BEHAVIOR = [
-    'LFS_TESTBD_BADBLOCK_PROGERROR',
-    'LFS_TESTBD_BADBLOCK_ERASEERROR',
-    'LFS_TESTBD_BADBLOCK_READERROR',
-    'LFS_TESTBD_BADBLOCK_PROGNOOP',
-    'LFS_TESTBD_BADBLOCK_ERASENOOP',
+define.LFS2_ERASE_CYCLES = 0xffffffff
+define.LFS2_ERASE_VALUE = [0x00, 0xff, -1]
+define.LFS2_BADBLOCK_BEHAVIOR = [
+    'LFS2_TESTBD_BADBLOCK_PROGERROR',
+    'LFS2_TESTBD_BADBLOCK_ERASEERROR',
+    'LFS2_TESTBD_BADBLOCK_READERROR',
+    'LFS2_TESTBD_BADBLOCK_PROGNOOP',
+    'LFS2_TESTBD_BADBLOCK_ERASENOOP',
 ]
 code = '''
-    lfs_testbd_setwear(&cfg, 0, 0xffffffff) => 0;
-    lfs_testbd_setwear(&cfg, 1, 0xffffffff) => 0;
+    lfs2_testbd_setwear(&cfg, 0, 0xffffffff) => 0;
+    lfs2_testbd_setwear(&cfg, 1, 0xffffffff) => 0;
 
-    lfs_format(&lfs, &cfg) => LFS_ERR_NOSPC;
-    lfs_mount(&lfs, &cfg) => LFS_ERR_CORRUPT;
+    lfs2_format(&lfs2, &cfg) => LFS2_ERR_NOSPC;
+    lfs2_mount(&lfs2, &cfg) => LFS2_ERR_CORRUPT;
 '''

tests/test_entries.toml

@@ -2,96 +2,96 @@
 # Note that these tests are intended for 512 byte inline sizes. They should
 # still pass with other inline sizes but wouldn't be testing anything.
 
-define.LFS_CACHE_SIZE = 512
-if = 'LFS_CACHE_SIZE % LFS_PROG_SIZE == 0 && LFS_CACHE_SIZE == 512'
+define.LFS2_CACHE_SIZE = 512
+if = 'LFS2_CACHE_SIZE % LFS2_PROG_SIZE == 0 && LFS2_CACHE_SIZE == 512'
 
 [[case]] # entry grow test
 code = '''
     uint8_t wbuffer[1024];
     uint8_t rbuffer[1024];
 
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     // write hi0 20
     sprintf(path, "hi0"); size = 20;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi1 20
     sprintf(path, "hi1"); size = 20;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi2 20
     sprintf(path, "hi2"); size = 20;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi3 20
     sprintf(path, "hi3"); size = 20;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // read hi1 20
     sprintf(path, "hi1"); size = 20;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi1 200
     sprintf(path, "hi1"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // read hi0 20
     sprintf(path, "hi0"); size = 20;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi1 200
     sprintf(path, "hi1"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi2 20
     sprintf(path, "hi2"); size = 20;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi3 20
     sprintf(path, "hi3"); size = 20;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # entry shrink test
@@ -99,88 +99,88 @@ code = '''
     uint8_t wbuffer[1024];
     uint8_t rbuffer[1024];
 
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     // write hi0 20
     sprintf(path, "hi0"); size = 20;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi1 200
     sprintf(path, "hi1"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi2 20
     sprintf(path, "hi2"); size = 20;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi3 20
     sprintf(path, "hi3"); size = 20;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // read hi1 200
     sprintf(path, "hi1"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi1 20
     sprintf(path, "hi1"); size = 20;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // read hi0 20
     sprintf(path, "hi0"); size = 20;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi1 20
     sprintf(path, "hi1"); size = 20;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi2 20
     sprintf(path, "hi2"); size = 20;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi3 20
     sprintf(path, "hi3"); size = 20;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # entry spill test
@@ -188,72 +188,72 @@ code = '''
     uint8_t wbuffer[1024];
     uint8_t rbuffer[1024];
 
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     // write hi0 200
     sprintf(path, "hi0"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi1 200
     sprintf(path, "hi1"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi2 200
     sprintf(path, "hi2"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi3 200
     sprintf(path, "hi3"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // read hi0 200
     sprintf(path, "hi0"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi1 200
     sprintf(path, "hi1"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi2 200
     sprintf(path, "hi2"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi3 200
     sprintf(path, "hi3"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # entry push spill test
@@ -261,88 +261,88 @@ code = '''
     uint8_t wbuffer[1024];
     uint8_t rbuffer[1024];
 
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     // write hi0 200
     sprintf(path, "hi0"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi1 20
     sprintf(path, "hi1"); size = 20;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi2 200
     sprintf(path, "hi2"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi3 200
     sprintf(path, "hi3"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // read hi1 20
     sprintf(path, "hi1"); size = 20;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi1 200
     sprintf(path, "hi1"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // read hi0 200
     sprintf(path, "hi0"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi1 200
     sprintf(path, "hi1"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi2 200
     sprintf(path, "hi2"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi3 200
     sprintf(path, "hi3"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # entry push spill two test
@@ -350,103 +350,103 @@ code = '''
     uint8_t wbuffer[1024];
     uint8_t rbuffer[1024];
 
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     // write hi0 200
     sprintf(path, "hi0"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi1 20
     sprintf(path, "hi1"); size = 20;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi2 200
     sprintf(path, "hi2"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi3 200
     sprintf(path, "hi3"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi4 200
     sprintf(path, "hi4"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // read hi1 20
     sprintf(path, "hi1"); size = 20;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi1 200
     sprintf(path, "hi1"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // read hi0 200
     sprintf(path, "hi0"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi1 200
     sprintf(path, "hi1"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi2 200
     sprintf(path, "hi2"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi3 200
     sprintf(path, "hi3"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi4 200
     sprintf(path, "hi4"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # entry drop test
@@ -454,158 +454,158 @@ code = '''
     uint8_t wbuffer[1024];
     uint8_t rbuffer[1024];
 
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     // write hi0 200
     sprintf(path, "hi0"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi1 200
     sprintf(path, "hi1"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi2 200
     sprintf(path, "hi2"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
     // write hi3 200
     sprintf(path, "hi3"); size = 200;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_remove(&lfs, "hi1") => 0;
-    lfs_stat(&lfs, "hi1", &info) => LFS_ERR_NOENT;
+    lfs2_remove(&lfs2, "hi1") => 0;
+    lfs2_stat(&lfs2, "hi1", &info) => LFS2_ERR_NOENT;
     // read hi0 200
     sprintf(path, "hi0"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi2 200
     sprintf(path, "hi2"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi3 200
     sprintf(path, "hi3"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_remove(&lfs, "hi2") => 0;
-    lfs_stat(&lfs, "hi2", &info) => LFS_ERR_NOENT;
+    lfs2_remove(&lfs2, "hi2") => 0;
+    lfs2_stat(&lfs2, "hi2", &info) => LFS2_ERR_NOENT;
     // read hi0 200
     sprintf(path, "hi0"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // read hi3 200
     sprintf(path, "hi3"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_remove(&lfs, "hi3") => 0;
-    lfs_stat(&lfs, "hi3", &info) => LFS_ERR_NOENT;
+    lfs2_remove(&lfs2, "hi3") => 0;
+    lfs2_stat(&lfs2, "hi3", &info) => LFS2_ERR_NOENT;
     // read hi0 200
     sprintf(path, "hi0"); size = 200;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_remove(&lfs, "hi0") => 0;
-    lfs_stat(&lfs, "hi0", &info) => LFS_ERR_NOENT;
+    lfs2_remove(&lfs2, "hi0") => 0;
+    lfs2_stat(&lfs2, "hi0", &info) => LFS2_ERR_NOENT;
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # create too big
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     memset(path, 'm', 200);
     path[200] = '\0';
 
     size = 400;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     uint8_t wbuffer[1024];
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     size = 400;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
     uint8_t rbuffer[1024];
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # resize too big
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     memset(path, 'm', 200);
     path[200] = '\0';
 
     size = 40;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     uint8_t wbuffer[1024];
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     size = 40;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
     uint8_t rbuffer[1024];
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     size = 400;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
     memset(wbuffer, 'c', size);
-    lfs_file_write(&lfs, &file, wbuffer, size) => size;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     size = 400;
-    lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-    lfs_file_read(&lfs, &file, rbuffer, size) => size;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+    lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
     memcmp(rbuffer, wbuffer, size) => 0;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''

tests/test_evil.toml

@@ -0,0 +1,288 @@
+# Tests for recovering from conditions which shouldn't normally
+# happen during normal operation of littlefs
+
+# invalid pointer tests (outside of block_count)
+
+[[case]] # invalid tail-pointer test
+define.TAIL_TYPE = ['LFS2_TYPE_HARDTAIL', 'LFS2_TYPE_SOFTTAIL']
+define.INVALSET = [0x3, 0x1, 0x2]
+in = "lfs2.c"
+code = '''
+    // create littlefs
+    lfs2_format(&lfs2, &cfg) => 0;
+
+    // change tail-pointer to invalid pointers
+    lfs2_init(&lfs2, &cfg) => 0;
+    lfs2_mdir_t mdir;
+    lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
+    lfs2_dir_commit(&lfs2, &mdir, LFS2_MKATTRS(
+            {LFS2_MKTAG(LFS2_TYPE_HARDTAIL, 0x3ff, 8),
+                (lfs2_block_t[2]){
+                    (INVALSET & 0x1) ? 0xcccccccc : 0,
+                    (INVALSET & 0x2) ? 0xcccccccc : 0}})) => 0;
+    lfs2_deinit(&lfs2) => 0;
+
+    // test that mount fails gracefully
+    lfs2_mount(&lfs2, &cfg) => LFS2_ERR_CORRUPT;
+'''
+
+[[case]] # invalid dir pointer test
+define.INVALSET = [0x3, 0x1, 0x2]
+in = "lfs2.c"
+code = '''
+    // create littlefs
+    lfs2_format(&lfs2, &cfg) => 0;
+    // make a dir
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "dir_here") => 0;
+    lfs2_unmount(&lfs2) => 0;
+
+    // change the dir pointer to be invalid
+    lfs2_init(&lfs2, &cfg) => 0;
+    lfs2_mdir_t mdir;
+    lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
+    // make sure id 1 == our directory
+    lfs2_dir_get(&lfs2, &mdir,
+            LFS2_MKTAG(0x700, 0x3ff, 0),
+            LFS2_MKTAG(LFS2_TYPE_NAME, 1, strlen("dir_here")), buffer)
+                => LFS2_MKTAG(LFS2_TYPE_DIR, 1, strlen("dir_here"));
+    assert(memcmp((char*)buffer, "dir_here", strlen("dir_here")) == 0);
+    // change dir pointer
+    lfs2_dir_commit(&lfs2, &mdir, LFS2_MKATTRS(
+            {LFS2_MKTAG(LFS2_TYPE_DIRSTRUCT, 1, 8),
+                (lfs2_block_t[2]){
+                    (INVALSET & 0x1) ? 0xcccccccc : 0,
+                    (INVALSET & 0x2) ? 0xcccccccc : 0}})) => 0;
+    lfs2_deinit(&lfs2) => 0;
+
+    // test that accessing our bad dir fails, note there's a number
+    // of ways to access the dir, some can fail, but some don't
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_stat(&lfs2, "dir_here", &info) => 0;
+    assert(strcmp(info.name, "dir_here") == 0);
+    assert(info.type == LFS2_TYPE_DIR);
+
+    lfs2_dir_open(&lfs2, &dir, "dir_here") => LFS2_ERR_CORRUPT;
+    lfs2_stat(&lfs2, "dir_here/file_here", &info) => LFS2_ERR_CORRUPT;
+    lfs2_dir_open(&lfs2, &dir, "dir_here/dir_here") => LFS2_ERR_CORRUPT;
+    lfs2_file_open(&lfs2, &file, "dir_here/file_here",
+            LFS2_O_RDONLY) => LFS2_ERR_CORRUPT;
+    lfs2_file_open(&lfs2, &file, "dir_here/file_here",
+            LFS2_O_WRONLY | LFS2_O_CREAT) => LFS2_ERR_CORRUPT;
+    lfs2_unmount(&lfs2) => 0;
+'''
+
+[[case]] # invalid file pointer test
+in = "lfs2.c"
+define.SIZE = [10, 1000, 100000] # faked file size
+code = '''
+    // create littlefs
+    lfs2_format(&lfs2, &cfg) => 0;
+    // make a file
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "file_here",
+            LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
+
+    // change the file pointer to be invalid
+    lfs2_init(&lfs2, &cfg) => 0;
+    lfs2_mdir_t mdir;
+    lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
+    // make sure id 1 == our file
+    lfs2_dir_get(&lfs2, &mdir,
+            LFS2_MKTAG(0x700, 0x3ff, 0),
+            LFS2_MKTAG(LFS2_TYPE_NAME, 1, strlen("file_here")), buffer)
+                => LFS2_MKTAG(LFS2_TYPE_REG, 1, strlen("file_here"));
+    assert(memcmp((char*)buffer, "file_here", strlen("file_here")) == 0);
+    // change file pointer
+    lfs2_dir_commit(&lfs2, &mdir, LFS2_MKATTRS(
+            {LFS2_MKTAG(LFS2_TYPE_CTZSTRUCT, 1, sizeof(struct lfs2_ctz)),
+                &(struct lfs2_ctz){0xcccccccc, lfs2_tole32(SIZE)}})) => 0;
+    lfs2_deinit(&lfs2) => 0;
+
+    // test that accessing our bad file fails, note there's a number
+    // of ways to access the dir, some can fail, but some don't
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_stat(&lfs2, "file_here", &info) => 0;
+    assert(strcmp(info.name, "file_here") == 0);
+    assert(info.type == LFS2_TYPE_REG);
+    assert(info.size == SIZE);
+
+    lfs2_file_open(&lfs2, &file, "file_here", LFS2_O_RDONLY) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, SIZE) => LFS2_ERR_CORRUPT;
+    lfs2_file_close(&lfs2, &file) => 0;
+
+    // any allocs that traverse CTZ must unfortunately must fail
+    if (SIZE > 2*LFS2_BLOCK_SIZE) {
+        lfs2_mkdir(&lfs2, "dir_here") => LFS2_ERR_CORRUPT;
+    }
+    lfs2_unmount(&lfs2) => 0;
+'''
+
+[[case]] # invalid pointer in CTZ skip-list test
+define.SIZE = ['2*LFS2_BLOCK_SIZE', '3*LFS2_BLOCK_SIZE', '4*LFS2_BLOCK_SIZE']
+in = "lfs2.c"
+code = '''
+    // create littlefs
+    lfs2_format(&lfs2, &cfg) => 0;
+    // make a file
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "file_here",
+            LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    for (int i = 0; i < SIZE; i++) {
+        char c = 'c';
+        lfs2_file_write(&lfs2, &file, &c, 1) => 1;
+    }
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
+    // change pointer in CTZ skip-list to be invalid
+    lfs2_init(&lfs2, &cfg) => 0;
+    lfs2_mdir_t mdir;
+    lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
+    // make sure id 1 == our file and get our CTZ structure
+    lfs2_dir_get(&lfs2, &mdir,
+            LFS2_MKTAG(0x700, 0x3ff, 0),
+            LFS2_MKTAG(LFS2_TYPE_NAME, 1, strlen("file_here")), buffer)
+                => LFS2_MKTAG(LFS2_TYPE_REG, 1, strlen("file_here"));
+    assert(memcmp((char*)buffer, "file_here", strlen("file_here")) == 0);
+    struct lfs2_ctz ctz;
+    lfs2_dir_get(&lfs2, &mdir,
+            LFS2_MKTAG(0x700, 0x3ff, 0),
+            LFS2_MKTAG(LFS2_TYPE_STRUCT, 1, sizeof(struct lfs2_ctz)), &ctz)
+                => LFS2_MKTAG(LFS2_TYPE_CTZSTRUCT, 1, sizeof(struct lfs2_ctz));
+    lfs2_ctz_fromle32(&ctz);
+    // rewrite block to contain bad pointer
+    uint8_t bbuffer[LFS2_BLOCK_SIZE];
+    cfg.read(&cfg, ctz.head, 0, bbuffer, LFS2_BLOCK_SIZE) => 0;
+    uint32_t bad = lfs2_tole32(0xcccccccc);
+    memcpy(&bbuffer[0], &bad, sizeof(bad));
+    memcpy(&bbuffer[4], &bad, sizeof(bad));
+    cfg.erase(&cfg, ctz.head) => 0;
+    cfg.prog(&cfg, ctz.head, 0, bbuffer, LFS2_BLOCK_SIZE) => 0;
+    lfs2_deinit(&lfs2) => 0;
+
+    // test that accessing our bad file fails, note there's a number
+    // of ways to access the dir, some can fail, but some don't
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_stat(&lfs2, "file_here", &info) => 0;
+    assert(strcmp(info.name, "file_here") == 0);
+    assert(info.type == LFS2_TYPE_REG);
+    assert(info.size == SIZE);
+
+    lfs2_file_open(&lfs2, &file, "file_here", LFS2_O_RDONLY) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, SIZE) => LFS2_ERR_CORRUPT;
+    lfs2_file_close(&lfs2, &file) => 0;
+
+    // any allocs that traverse CTZ must unfortunately must fail
+    if (SIZE > 2*LFS2_BLOCK_SIZE) {
+        lfs2_mkdir(&lfs2, "dir_here") => LFS2_ERR_CORRUPT;
+    }
+    lfs2_unmount(&lfs2) => 0;
+'''
+
+
+[[case]] # invalid gstate pointer
+define.INVALSET = [0x3, 0x1, 0x2]
+in = "lfs2.c"
+code = '''
+    // create littlefs
+    lfs2_format(&lfs2, &cfg) => 0;
+
+    // create an invalid gstate
+    lfs2_init(&lfs2, &cfg) => 0;
+    lfs2_mdir_t mdir;
+    lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
+    lfs2_fs_prepmove(&lfs2, 1, (lfs2_block_t [2]){
+            (INVALSET & 0x1) ? 0xcccccccc : 0,
+            (INVALSET & 0x2) ? 0xcccccccc : 0});
+    lfs2_dir_commit(&lfs2, &mdir, NULL, 0) => 0;
+    lfs2_deinit(&lfs2) => 0;
+
+    // test that mount fails gracefully
+    // mount may not fail, but our first alloc should fail when
+    // we try to fix the gstate
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "should_fail") => LFS2_ERR_CORRUPT;
+    lfs2_unmount(&lfs2) => 0;
+'''
+
+# cycle detection/recovery tests
+
+[[case]] # metadata-pair threaded-list loop test
+in = "lfs2.c"
+code = '''
+    // create littlefs
+    lfs2_format(&lfs2, &cfg) => 0;
+
+    // change tail-pointer to point to ourself
+    lfs2_init(&lfs2, &cfg) => 0;
+    lfs2_mdir_t mdir;
+    lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
+    lfs2_dir_commit(&lfs2, &mdir, LFS2_MKATTRS(
+            {LFS2_MKTAG(LFS2_TYPE_HARDTAIL, 0x3ff, 8),
+                (lfs2_block_t[2]){0, 1}})) => 0;
+    lfs2_deinit(&lfs2) => 0;
+
+    // test that mount fails gracefully
+    lfs2_mount(&lfs2, &cfg) => LFS2_ERR_CORRUPT;
+'''
+
+[[case]] # metadata-pair threaded-list 2-length loop test
+in = "lfs2.c"
+code = '''
+    // create littlefs with child dir
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "child") => 0;
+    lfs2_unmount(&lfs2) => 0;
+
+    // find child
+    lfs2_init(&lfs2, &cfg) => 0;
+    lfs2_mdir_t mdir;
+    lfs2_block_t pair[2];
+    lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
+    lfs2_dir_get(&lfs2, &mdir,
+            LFS2_MKTAG(0x7ff, 0x3ff, 0),
+            LFS2_MKTAG(LFS2_TYPE_DIRSTRUCT, 1, sizeof(pair)), pair)
+                => LFS2_MKTAG(LFS2_TYPE_DIRSTRUCT, 1, sizeof(pair));
+    lfs2_pair_fromle32(pair);
+    // change tail-pointer to point to root
+    lfs2_dir_fetch(&lfs2, &mdir, pair) => 0;
+    lfs2_dir_commit(&lfs2, &mdir, LFS2_MKATTRS(
+            {LFS2_MKTAG(LFS2_TYPE_HARDTAIL, 0x3ff, 8),
+                (lfs2_block_t[2]){0, 1}})) => 0;
+    lfs2_deinit(&lfs2) => 0;
+
+    // test that mount fails gracefully
+    lfs2_mount(&lfs2, &cfg) => LFS2_ERR_CORRUPT;
+'''
+
+[[case]] # metadata-pair threaded-list 1-length child loop test
+in = "lfs2.c"
+code = '''
+    // create littlefs with child dir
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "child") => 0;
+    lfs2_unmount(&lfs2) => 0;
+
+    // find child
+    lfs2_init(&lfs2, &cfg) => 0;
+    lfs2_mdir_t mdir;
+    lfs2_block_t pair[2];
+    lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
+    lfs2_dir_get(&lfs2, &mdir,
+            LFS2_MKTAG(0x7ff, 0x3ff, 0),
+            LFS2_MKTAG(LFS2_TYPE_DIRSTRUCT, 1, sizeof(pair)), pair)
+                => LFS2_MKTAG(LFS2_TYPE_DIRSTRUCT, 1, sizeof(pair));
+    lfs2_pair_fromle32(pair);
+    // change tail-pointer to point to ourself
+    lfs2_dir_fetch(&lfs2, &mdir, pair) => 0;
+    lfs2_dir_commit(&lfs2, &mdir, LFS2_MKATTRS(
+            {LFS2_MKTAG(LFS2_TYPE_HARDTAIL, 0x3ff, 8), pair})) => 0;
+    lfs2_deinit(&lfs2) => 0;
+
+    // test that mount fails gracefully
+    lfs2_mount(&lfs2, &cfg) => LFS2_ERR_CORRUPT;
+'''

tests/test_exhaustion.toml

@@ -1,49 +1,49 @@
 [[case]] # test running a filesystem to exhaustion
-define.LFS_ERASE_CYCLES = 10
-define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
-define.LFS_BLOCK_CYCLES = 'LFS_ERASE_CYCLES / 2'
-define.LFS_BADBLOCK_BEHAVIOR = [
-    'LFS_TESTBD_BADBLOCK_PROGERROR',
-    'LFS_TESTBD_BADBLOCK_ERASEERROR',
-    'LFS_TESTBD_BADBLOCK_READERROR',
-    'LFS_TESTBD_BADBLOCK_PROGNOOP',
-    'LFS_TESTBD_BADBLOCK_ERASENOOP',
+define.LFS2_ERASE_CYCLES = 10
+define.LFS2_BLOCK_COUNT = 256 # small bd so test runs faster
+define.LFS2_BLOCK_CYCLES = 'LFS2_ERASE_CYCLES / 2'
+define.LFS2_BADBLOCK_BEHAVIOR = [
+    'LFS2_TESTBD_BADBLOCK_PROGERROR',
+    'LFS2_TESTBD_BADBLOCK_ERASEERROR',
+    'LFS2_TESTBD_BADBLOCK_READERROR',
+    'LFS2_TESTBD_BADBLOCK_PROGNOOP',
+    'LFS2_TESTBD_BADBLOCK_ERASENOOP',
 ]
 define.FILES = 10
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "roadrunner") => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "roadrunner") => 0;
+    lfs2_unmount(&lfs2) => 0;
 
     uint32_t cycle = 0;
     while (true) {
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
         for (uint32_t i = 0; i < FILES; i++) {
             // chose name, roughly random seed, and random 2^n size
             sprintf(path, "roadrunner/test%d", i);
             srand(cycle * i);
             size = 1 << ((rand() % 10)+2);
 
-            lfs_file_open(&lfs, &file, path,
-                    LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+            lfs2_file_open(&lfs2, &file, path,
+                    LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
 
-            for (lfs_size_t j = 0; j < size; j++) {
+            for (lfs2_size_t j = 0; j < size; j++) {
                 char c = 'a' + (rand() % 26);
-                lfs_ssize_t res = lfs_file_write(&lfs, &file, &c, 1);
-                assert(res == 1 || res == LFS_ERR_NOSPC);
-                if (res == LFS_ERR_NOSPC) {
-                    err = lfs_file_close(&lfs, &file);
-                    assert(err == 0 || err == LFS_ERR_NOSPC);
-                    lfs_unmount(&lfs) => 0;
+                lfs2_ssize_t res = lfs2_file_write(&lfs2, &file, &c, 1);
+                assert(res == 1 || res == LFS2_ERR_NOSPC);
+                if (res == LFS2_ERR_NOSPC) {
+                    err = lfs2_file_close(&lfs2, &file);
+                    assert(err == 0 || err == LFS2_ERR_NOSPC);
+                    lfs2_unmount(&lfs2) => 0;
                     goto exhausted;
                 }
             }
 
-            err = lfs_file_close(&lfs, &file);
-            assert(err == 0 || err == LFS_ERR_NOSPC);
-            if (err == LFS_ERR_NOSPC) {
-                lfs_unmount(&lfs) => 0;
+            err = lfs2_file_close(&lfs2, &file);
+            assert(err == 0 || err == LFS2_ERR_NOSPC);
+            if (err == LFS2_ERR_NOSPC) {
+                lfs2_unmount(&lfs2) => 0;
                 goto exhausted;
             }
         }
@@ -54,78 +54,78 @@ code = '''
             srand(cycle * i);
             size = 1 << ((rand() % 10)+2);
 
-            lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-            for (lfs_size_t j = 0; j < size; j++) {
+            lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+            for (lfs2_size_t j = 0; j < size; j++) {
                 char c = 'a' + (rand() % 26);
                 char r;
-                lfs_file_read(&lfs, &file, &r, 1) => 1;
+                lfs2_file_read(&lfs2, &file, &r, 1) => 1;
                 assert(r == c);
             }
 
-            lfs_file_close(&lfs, &file) => 0;
+            lfs2_file_close(&lfs2, &file) => 0;
         }
-        lfs_unmount(&lfs) => 0;
+        lfs2_unmount(&lfs2) => 0;
 
         cycle += 1;
     }
 
 exhausted:
     // should still be readable
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (uint32_t i = 0; i < FILES; i++) {
         // check for errors
         sprintf(path, "roadrunner/test%d", i);
-        lfs_stat(&lfs, path, &info) => 0;
+        lfs2_stat(&lfs2, path, &info) => 0;
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    LFS_WARN("completed %d cycles", cycle);
+    LFS2_WARN("completed %d cycles", cycle);
 '''
 
 [[case]] # test running a filesystem to exhaustion
          # which also requires expanding superblocks
-define.LFS_ERASE_CYCLES = 10
-define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
-define.LFS_BLOCK_CYCLES = 'LFS_ERASE_CYCLES / 2'
-define.LFS_BADBLOCK_BEHAVIOR = [
-    'LFS_TESTBD_BADBLOCK_PROGERROR',
-    'LFS_TESTBD_BADBLOCK_ERASEERROR',
-    'LFS_TESTBD_BADBLOCK_READERROR',
-    'LFS_TESTBD_BADBLOCK_PROGNOOP',
-    'LFS_TESTBD_BADBLOCK_ERASENOOP',
+define.LFS2_ERASE_CYCLES = 10
+define.LFS2_BLOCK_COUNT = 256 # small bd so test runs faster
+define.LFS2_BLOCK_CYCLES = 'LFS2_ERASE_CYCLES / 2'
+define.LFS2_BADBLOCK_BEHAVIOR = [
+    'LFS2_TESTBD_BADBLOCK_PROGERROR',
+    'LFS2_TESTBD_BADBLOCK_ERASEERROR',
+    'LFS2_TESTBD_BADBLOCK_READERROR',
+    'LFS2_TESTBD_BADBLOCK_PROGNOOP',
+    'LFS2_TESTBD_BADBLOCK_ERASENOOP',
 ]
 define.FILES = 10
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
 
     uint32_t cycle = 0;
     while (true) {
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
         for (uint32_t i = 0; i < FILES; i++) {
             // chose name, roughly random seed, and random 2^n size
             sprintf(path, "test%d", i);
             srand(cycle * i);
             size = 1 << ((rand() % 10)+2);
 
-            lfs_file_open(&lfs, &file, path,
-                    LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+            lfs2_file_open(&lfs2, &file, path,
+                    LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
 
-            for (lfs_size_t j = 0; j < size; j++) {
+            for (lfs2_size_t j = 0; j < size; j++) {
                 char c = 'a' + (rand() % 26);
-                lfs_ssize_t res = lfs_file_write(&lfs, &file, &c, 1);
-                assert(res == 1 || res == LFS_ERR_NOSPC);
-                if (res == LFS_ERR_NOSPC) {
-                    err = lfs_file_close(&lfs, &file);
-                    assert(err == 0 || err == LFS_ERR_NOSPC);
-                    lfs_unmount(&lfs) => 0;
+                lfs2_ssize_t res = lfs2_file_write(&lfs2, &file, &c, 1);
+                assert(res == 1 || res == LFS2_ERR_NOSPC);
+                if (res == LFS2_ERR_NOSPC) {
+                    err = lfs2_file_close(&lfs2, &file);
+                    assert(err == 0 || err == LFS2_ERR_NOSPC);
+                    lfs2_unmount(&lfs2) => 0;
                     goto exhausted;
                 }
             }
 
-            err = lfs_file_close(&lfs, &file);
-            assert(err == 0 || err == LFS_ERR_NOSPC);
-            if (err == LFS_ERR_NOSPC) {
-                lfs_unmount(&lfs) => 0;
+            err = lfs2_file_close(&lfs2, &file);
+            assert(err == 0 || err == LFS2_ERR_NOSPC);
+            if (err == LFS2_ERR_NOSPC) {
+                lfs2_unmount(&lfs2) => 0;
                 goto exhausted;
             }
         }
@@ -136,32 +136,32 @@ code = '''
             srand(cycle * i);
             size = 1 << ((rand() % 10)+2);
 
-            lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-            for (lfs_size_t j = 0; j < size; j++) {
+            lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+            for (lfs2_size_t j = 0; j < size; j++) {
                 char c = 'a' + (rand() % 26);
                 char r;
-                lfs_file_read(&lfs, &file, &r, 1) => 1;
+                lfs2_file_read(&lfs2, &file, &r, 1) => 1;
                 assert(r == c);
             }
 
-            lfs_file_close(&lfs, &file) => 0;
+            lfs2_file_close(&lfs2, &file) => 0;
         }
-        lfs_unmount(&lfs) => 0;
+        lfs2_unmount(&lfs2) => 0;
 
         cycle += 1;
     }
 
 exhausted:
     // should still be readable
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (uint32_t i = 0; i < FILES; i++) {
         // check for errors
         sprintf(path, "test%d", i);
-        lfs_stat(&lfs, path, &info) => 0;
+        lfs2_stat(&lfs2, path, &info) => 0;
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    LFS_WARN("completed %d cycles", cycle);
+    LFS2_WARN("completed %d cycles", cycle);
 '''
 
 # These are a sort of high-level litmus test for wear-leveling. One definition
@@ -170,53 +170,53 @@ exhausted:
 # check for.
 
 [[case]] # wear-level test running a filesystem to exhaustion
-define.LFS_ERASE_CYCLES = 20
-define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
-define.LFS_BLOCK_CYCLES = 'LFS_ERASE_CYCLES / 2'
+define.LFS2_ERASE_CYCLES = 20
+define.LFS2_BLOCK_COUNT = 256 # small bd so test runs faster
+define.LFS2_BLOCK_CYCLES = 'LFS2_ERASE_CYCLES / 2'
 define.FILES = 10
 code = '''
     uint32_t run_cycles[2];
-    const uint32_t run_block_count[2] = {LFS_BLOCK_COUNT/2, LFS_BLOCK_COUNT};
+    const uint32_t run_block_count[2] = {LFS2_BLOCK_COUNT/2, LFS2_BLOCK_COUNT};
 
     for (int run = 0; run < 2; run++) {
-        for (lfs_block_t b = 0; b < LFS_BLOCK_COUNT; b++) {
-            lfs_testbd_setwear(&cfg, b,
-                    (b < run_block_count[run]) ? 0 : LFS_ERASE_CYCLES) => 0;
+        for (lfs2_block_t b = 0; b < LFS2_BLOCK_COUNT; b++) {
+            lfs2_testbd_setwear(&cfg, b,
+                    (b < run_block_count[run]) ? 0 : LFS2_ERASE_CYCLES) => 0;
         }
 
-        lfs_format(&lfs, &cfg) => 0;
-        lfs_mount(&lfs, &cfg) => 0;
-        lfs_mkdir(&lfs, "roadrunner") => 0;
-        lfs_unmount(&lfs) => 0;
+        lfs2_format(&lfs2, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
+        lfs2_mkdir(&lfs2, "roadrunner") => 0;
+        lfs2_unmount(&lfs2) => 0;
 
         uint32_t cycle = 0;
         while (true) {
-            lfs_mount(&lfs, &cfg) => 0;
+            lfs2_mount(&lfs2, &cfg) => 0;
             for (uint32_t i = 0; i < FILES; i++) {
                 // chose name, roughly random seed, and random 2^n size
                 sprintf(path, "roadrunner/test%d", i);
                 srand(cycle * i);
                 size = 1 << ((rand() % 10)+2);
 
-                lfs_file_open(&lfs, &file, path,
-                        LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+                lfs2_file_open(&lfs2, &file, path,
+                        LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
 
-                for (lfs_size_t j = 0; j < size; j++) {
+                for (lfs2_size_t j = 0; j < size; j++) {
                     char c = 'a' + (rand() % 26);
-                    lfs_ssize_t res = lfs_file_write(&lfs, &file, &c, 1);
-                    assert(res == 1 || res == LFS_ERR_NOSPC);
-                    if (res == LFS_ERR_NOSPC) {
-                        err = lfs_file_close(&lfs, &file);
-                        assert(err == 0 || err == LFS_ERR_NOSPC);
-                        lfs_unmount(&lfs) => 0;
+                    lfs2_ssize_t res = lfs2_file_write(&lfs2, &file, &c, 1);
+                    assert(res == 1 || res == LFS2_ERR_NOSPC);
+                    if (res == LFS2_ERR_NOSPC) {
+                        err = lfs2_file_close(&lfs2, &file);
+                        assert(err == 0 || err == LFS2_ERR_NOSPC);
+                        lfs2_unmount(&lfs2) => 0;
                         goto exhausted;
                     }
                 }
 
-                err = lfs_file_close(&lfs, &file);
-                assert(err == 0 || err == LFS_ERR_NOSPC);
-                if (err == LFS_ERR_NOSPC) {
-                    lfs_unmount(&lfs) => 0;
+                err = lfs2_file_close(&lfs2, &file);
+                assert(err == 0 || err == LFS2_ERR_NOSPC);
+                if (err == LFS2_ERR_NOSPC) {
+                    lfs2_unmount(&lfs2) => 0;
                     goto exhausted;
                 }
             }
@@ -227,85 +227,85 @@ code = '''
                 srand(cycle * i);
                 size = 1 << ((rand() % 10)+2);
 
-                lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-                for (lfs_size_t j = 0; j < size; j++) {
+                lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+                for (lfs2_size_t j = 0; j < size; j++) {
                     char c = 'a' + (rand() % 26);
                     char r;
-                    lfs_file_read(&lfs, &file, &r, 1) => 1;
+                    lfs2_file_read(&lfs2, &file, &r, 1) => 1;
                     assert(r == c);
                 }
 
-                lfs_file_close(&lfs, &file) => 0;
+                lfs2_file_close(&lfs2, &file) => 0;
             }
-            lfs_unmount(&lfs) => 0;
+            lfs2_unmount(&lfs2) => 0;
 
             cycle += 1;
         }
 
 exhausted:
         // should still be readable
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
         for (uint32_t i = 0; i < FILES; i++) {
             // check for errors
             sprintf(path, "roadrunner/test%d", i);
-            lfs_stat(&lfs, path, &info) => 0;
+            lfs2_stat(&lfs2, path, &info) => 0;
         }
-        lfs_unmount(&lfs) => 0;
+        lfs2_unmount(&lfs2) => 0;
 
         run_cycles[run] = cycle;
-        LFS_WARN("completed %d blocks %d cycles",
+        LFS2_WARN("completed %d blocks %d cycles",
                 run_block_count[run], run_cycles[run]);
     }
 
     // check we increased the lifetime by 2x with ~10% error
-    LFS_ASSERT(run_cycles[1]*110/100 > 2*run_cycles[0]);
+    LFS2_ASSERT(run_cycles[1]*110/100 > 2*run_cycles[0]);
 '''
 
 [[case]] # wear-level test + expanding superblock
-define.LFS_ERASE_CYCLES = 20
-define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
-define.LFS_BLOCK_CYCLES = 'LFS_ERASE_CYCLES / 2'
+define.LFS2_ERASE_CYCLES = 20
+define.LFS2_BLOCK_COUNT = 256 # small bd so test runs faster
+define.LFS2_BLOCK_CYCLES = 'LFS2_ERASE_CYCLES / 2'
 define.FILES = 10
 code = '''
     uint32_t run_cycles[2];
-    const uint32_t run_block_count[2] = {LFS_BLOCK_COUNT/2, LFS_BLOCK_COUNT};
+    const uint32_t run_block_count[2] = {LFS2_BLOCK_COUNT/2, LFS2_BLOCK_COUNT};
 
     for (int run = 0; run < 2; run++) {
-        for (lfs_block_t b = 0; b < LFS_BLOCK_COUNT; b++) {
-            lfs_testbd_setwear(&cfg, b,
-                    (b < run_block_count[run]) ? 0 : LFS_ERASE_CYCLES) => 0;
+        for (lfs2_block_t b = 0; b < LFS2_BLOCK_COUNT; b++) {
+            lfs2_testbd_setwear(&cfg, b,
+                    (b < run_block_count[run]) ? 0 : LFS2_ERASE_CYCLES) => 0;
         }
 
-        lfs_format(&lfs, &cfg) => 0;
+        lfs2_format(&lfs2, &cfg) => 0;
 
         uint32_t cycle = 0;
         while (true) {
-            lfs_mount(&lfs, &cfg) => 0;
+            lfs2_mount(&lfs2, &cfg) => 0;
             for (uint32_t i = 0; i < FILES; i++) {
                 // chose name, roughly random seed, and random 2^n size
                 sprintf(path, "test%d", i);
                 srand(cycle * i);
                 size = 1 << ((rand() % 10)+2);
 
-                lfs_file_open(&lfs, &file, path,
-                        LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+                lfs2_file_open(&lfs2, &file, path,
+                        LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
 
-                for (lfs_size_t j = 0; j < size; j++) {
+                for (lfs2_size_t j = 0; j < size; j++) {
                     char c = 'a' + (rand() % 26);
-                    lfs_ssize_t res = lfs_file_write(&lfs, &file, &c, 1);
-                    assert(res == 1 || res == LFS_ERR_NOSPC);
-                    if (res == LFS_ERR_NOSPC) {
-                        err = lfs_file_close(&lfs, &file);
-                        assert(err == 0 || err == LFS_ERR_NOSPC);
-                        lfs_unmount(&lfs) => 0;
+                    lfs2_ssize_t res = lfs2_file_write(&lfs2, &file, &c, 1);
+                    assert(res == 1 || res == LFS2_ERR_NOSPC);
+                    if (res == LFS2_ERR_NOSPC) {
+                        err = lfs2_file_close(&lfs2, &file);
+                        assert(err == 0 || err == LFS2_ERR_NOSPC);
+                        lfs2_unmount(&lfs2) => 0;
                         goto exhausted;
                     }
                 }
 
-                err = lfs_file_close(&lfs, &file);
-                assert(err == 0 || err == LFS_ERR_NOSPC);
-                if (err == LFS_ERR_NOSPC) {
-                    lfs_unmount(&lfs) => 0;
+                err = lfs2_file_close(&lfs2, &file);
+                assert(err == 0 || err == LFS2_ERR_NOSPC);
+                if (err == LFS2_ERR_NOSPC) {
+                    lfs2_unmount(&lfs2) => 0;
                     goto exhausted;
                 }
             }
@@ -316,151 +316,150 @@ code = '''
                 srand(cycle * i);
                 size = 1 << ((rand() % 10)+2);
 
-                lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-                for (lfs_size_t j = 0; j < size; j++) {
+                lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+                for (lfs2_size_t j = 0; j < size; j++) {
                     char c = 'a' + (rand() % 26);
                     char r;
-                    lfs_file_read(&lfs, &file, &r, 1) => 1;
+                    lfs2_file_read(&lfs2, &file, &r, 1) => 1;
                     assert(r == c);
                 }
 
-                lfs_file_close(&lfs, &file) => 0;
+                lfs2_file_close(&lfs2, &file) => 0;
             }
-            lfs_unmount(&lfs) => 0;
+            lfs2_unmount(&lfs2) => 0;
 
             cycle += 1;
         }
 
 exhausted:
         // should still be readable
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
         for (uint32_t i = 0; i < FILES; i++) {
             // check for errors
             sprintf(path, "test%d", i);
-            lfs_stat(&lfs, path, &info) => 0;
+            lfs2_stat(&lfs2, path, &info) => 0;
         }
-        lfs_unmount(&lfs) => 0;
+        lfs2_unmount(&lfs2) => 0;
 
         run_cycles[run] = cycle;
-        LFS_WARN("completed %d blocks %d cycles",
+        LFS2_WARN("completed %d blocks %d cycles",
                 run_block_count[run], run_cycles[run]);
     }
 
     // check we increased the lifetime by 2x with ~10% error
-    LFS_ASSERT(run_cycles[1]*110/100 > 2*run_cycles[0]);
+    LFS2_ASSERT(run_cycles[1]*110/100 > 2*run_cycles[0]);
 '''
 
-# TODO fixme
-#[[case]] # test that we wear blocks roughly evenly
-#define.LFS_ERASE_CYCLES = 0xffffffff
-#define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
-#define.LFS_BLOCK_CYCLES = [5, 4, 3, 2, 1]
-#define.CYCLES = 100
-#define.FILES = 10
-#if = 'LFS_BLOCK_CYCLES < CYCLES/10'
-#code = '''
-#    lfs_format(&lfs, &cfg) => 0;
-#    lfs_mount(&lfs, &cfg) => 0;
-#    lfs_mkdir(&lfs, "roadrunner") => 0;
-#    lfs_unmount(&lfs) => 0;
-#
-#    uint32_t cycle = 0;
-#    while (cycle < CYCLES) {
-#        lfs_mount(&lfs, &cfg) => 0;
-#        for (uint32_t i = 0; i < FILES; i++) {
-#            // chose name, roughly random seed, and random 2^n size
-#            sprintf(path, "roadrunner/test%d", i);
-#            srand(cycle * i);
-#            size = 1 << 4; //((rand() % 10)+2);
-#
-#            lfs_file_open(&lfs, &file, path,
-#                    LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
-#
-#            for (lfs_size_t j = 0; j < size; j++) {
-#                char c = 'a' + (rand() % 26);
-#                lfs_ssize_t res = lfs_file_write(&lfs, &file, &c, 1);
-#                assert(res == 1 || res == LFS_ERR_NOSPC);
-#                if (res == LFS_ERR_NOSPC) {
-#                    err = lfs_file_close(&lfs, &file);
-#                    assert(err == 0 || err == LFS_ERR_NOSPC);
-#                    lfs_unmount(&lfs) => 0;
-#                    goto exhausted;
-#                }
-#            }
-#
-#            err = lfs_file_close(&lfs, &file);
-#            assert(err == 0 || err == LFS_ERR_NOSPC);
-#            if (err == LFS_ERR_NOSPC) {
-#                lfs_unmount(&lfs) => 0;
-#                goto exhausted;
-#            }
-#        }
-#
-#        for (uint32_t i = 0; i < FILES; i++) {
-#            // check for errors
-#            sprintf(path, "roadrunner/test%d", i);
-#            srand(cycle * i);
-#            size = 1 << 4; //((rand() % 10)+2);
-#
-#            lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-#            for (lfs_size_t j = 0; j < size; j++) {
-#                char c = 'a' + (rand() % 26);
-#                char r;
-#                lfs_file_read(&lfs, &file, &r, 1) => 1;
-#                assert(r == c);
-#            }
-#
-#            lfs_file_close(&lfs, &file) => 0;
-#        }
-#        lfs_unmount(&lfs) => 0;
-#
-#        cycle += 1;
-#    }
-#
-#exhausted:
-#    // should still be readable
-#    lfs_mount(&lfs, &cfg) => 0;
-#    for (uint32_t i = 0; i < FILES; i++) {
-#        // check for errors
-#        sprintf(path, "roadrunner/test%d", i);
-#        lfs_stat(&lfs, path, &info) => 0;
-#    }
-#    lfs_unmount(&lfs) => 0;
-#
-#    LFS_WARN("completed %d cycles", cycle);
-#
-#    // check the wear on our block device
-#    lfs_testbd_wear_t minwear = -1;
-#    lfs_testbd_wear_t totalwear = 0;
-#    lfs_testbd_wear_t maxwear = 0;
-#    // skip 0 and 1 as superblock movement is intentionally avoided
-#    for (lfs_block_t b = 2; b < LFS_BLOCK_COUNT; b++) {
-#        lfs_testbd_wear_t wear = lfs_testbd_getwear(&cfg, b);
-#        printf("%08x: wear %d\n", b, wear);
-#        assert(wear >= 0);
-#        if (wear < minwear) {
-#            minwear = wear;
-#        }
-#        if (wear > maxwear) {
-#            maxwear = wear;
-#        }
-#        totalwear += wear;
-#    }
-#    lfs_testbd_wear_t avgwear = totalwear / LFS_BLOCK_COUNT;
-#    LFS_WARN("max wear: %d cycles", maxwear);
-#    LFS_WARN("avg wear: %d cycles", totalwear / LFS_BLOCK_COUNT);
-#    LFS_WARN("min wear: %d cycles", minwear);
-#
-#    // find standard deviation^2
-#    lfs_testbd_wear_t dev2 = 0;
-#    for (lfs_block_t b = 2; b < LFS_BLOCK_COUNT; b++) {
-#        lfs_testbd_wear_t wear = lfs_testbd_getwear(&cfg, b);
-#        assert(wear >= 0);
-#        lfs_testbd_swear_t diff = wear - avgwear;
-#        dev2 += diff*diff;
-#    }
-#    dev2 /= totalwear;
-#    LFS_WARN("std dev^2: %d", dev2);
-#    assert(dev2 < 8);
-#'''
+[[case]] # test that we wear blocks roughly evenly
+define.LFS2_ERASE_CYCLES = 0xffffffff
+define.LFS2_BLOCK_COUNT = 256 # small bd so test runs faster
+define.LFS2_BLOCK_CYCLES = [5, 4, 3, 2, 1]
+define.CYCLES = 100
+define.FILES = 10
+if = 'LFS2_BLOCK_CYCLES < CYCLES/10'
+code = '''
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "roadrunner") => 0;
+    lfs2_unmount(&lfs2) => 0;
+
+    uint32_t cycle = 0;
+    while (cycle < CYCLES) {
+        lfs2_mount(&lfs2, &cfg) => 0;
+        for (uint32_t i = 0; i < FILES; i++) {
+            // chose name, roughly random seed, and random 2^n size
+            sprintf(path, "roadrunner/test%d", i);
+            srand(cycle * i);
+            size = 1 << 4; //((rand() % 10)+2);
+
+            lfs2_file_open(&lfs2, &file, path,
+                    LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
+
+            for (lfs2_size_t j = 0; j < size; j++) {
+                char c = 'a' + (rand() % 26);
+                lfs2_ssize_t res = lfs2_file_write(&lfs2, &file, &c, 1);
+                assert(res == 1 || res == LFS2_ERR_NOSPC);
+                if (res == LFS2_ERR_NOSPC) {
+                    err = lfs2_file_close(&lfs2, &file);
+                    assert(err == 0 || err == LFS2_ERR_NOSPC);
+                    lfs2_unmount(&lfs2) => 0;
+                    goto exhausted;
+                }
+            }
+
+            err = lfs2_file_close(&lfs2, &file);
+            assert(err == 0 || err == LFS2_ERR_NOSPC);
+            if (err == LFS2_ERR_NOSPC) {
+                lfs2_unmount(&lfs2) => 0;
+                goto exhausted;
+            }
+        }
+
+        for (uint32_t i = 0; i < FILES; i++) {
+            // check for errors
+            sprintf(path, "roadrunner/test%d", i);
+            srand(cycle * i);
+            size = 1 << 4; //((rand() % 10)+2);
+
+            lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+            for (lfs2_size_t j = 0; j < size; j++) {
+                char c = 'a' + (rand() % 26);
+                char r;
+                lfs2_file_read(&lfs2, &file, &r, 1) => 1;
+                assert(r == c);
+            }
+
+            lfs2_file_close(&lfs2, &file) => 0;
+        }
+        lfs2_unmount(&lfs2) => 0;
+
+        cycle += 1;
+    }
+
+exhausted:
+    // should still be readable
+    lfs2_mount(&lfs2, &cfg) => 0;
+    for (uint32_t i = 0; i < FILES; i++) {
+        // check for errors
+        sprintf(path, "roadrunner/test%d", i);
+        lfs2_stat(&lfs2, path, &info) => 0;
+    }
+    lfs2_unmount(&lfs2) => 0;
+
+    LFS2_WARN("completed %d cycles", cycle);
+
+    // check the wear on our block device
+    lfs2_testbd_wear_t minwear = -1;
+    lfs2_testbd_wear_t totalwear = 0;
+    lfs2_testbd_wear_t maxwear = 0;
+    // skip 0 and 1 as superblock movement is intentionally avoided
+    for (lfs2_block_t b = 2; b < LFS2_BLOCK_COUNT; b++) {
+        lfs2_testbd_wear_t wear = lfs2_testbd_getwear(&cfg, b);
+        printf("%08x: wear %d\n", b, wear);
+        assert(wear >= 0);
+        if (wear < minwear) {
+            minwear = wear;
+        }
+        if (wear > maxwear) {
+            maxwear = wear;
+        }
+        totalwear += wear;
+    }
+    lfs2_testbd_wear_t avgwear = totalwear / LFS2_BLOCK_COUNT;
+    LFS2_WARN("max wear: %d cycles", maxwear);
+    LFS2_WARN("avg wear: %d cycles", totalwear / LFS2_BLOCK_COUNT);
+    LFS2_WARN("min wear: %d cycles", minwear);
+
+    // find standard deviation^2
+    lfs2_testbd_wear_t dev2 = 0;
+    for (lfs2_block_t b = 2; b < LFS2_BLOCK_COUNT; b++) {
+        lfs2_testbd_wear_t wear = lfs2_testbd_getwear(&cfg, b);
+        assert(wear >= 0);
+        lfs2_testbd_swear_t diff = wear - avgwear;
+        dev2 += diff*diff;
+    }
+    dev2 /= totalwear;
+    LFS2_WARN("std dev^2: %d", dev2);
+    assert(dev2 < 8);
+'''
 

tests/test_files.toml

@@ -1,60 +1,60 @@
 
 [[case]] # simple file test
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "hello",
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "hello",
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_EXCL) => 0;
     size = strlen("Hello World!")+1;
     strcpy((char*)buffer, "Hello World!");
-    lfs_file_write(&lfs, &file, buffer, size) => size;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_write(&lfs2, &file, buffer, size) => size;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "hello", LFS2_O_RDONLY) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     assert(strcmp((char*)buffer, "Hello World!") == 0);
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # larger files
 define.SIZE = [32, 8192, 262144, 0, 7, 8193]
 define.CHUNKSIZE = [31, 16, 33, 1, 1023]
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
 
     // write
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "avacado",
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "avacado",
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_EXCL) => 0;
     srand(1);
-    for (lfs_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE-i);
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             buffer[b] = rand() & 0xff;
         }
-        lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
+        lfs2_file_write(&lfs2, &file, buffer, chunk) => chunk;
     }
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
     // read
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => SIZE;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "avacado", LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => SIZE;
     srand(1);
-    for (lfs_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
-        lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE-i);
+        lfs2_file_read(&lfs2, &file, buffer, chunk) => chunk;
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             assert(buffer[b] == (rand() & 0xff));
         }
     }
-    lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, CHUNKSIZE) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # rewriting files
@@ -62,81 +62,81 @@ define.SIZE1 = [32, 8192, 131072, 0, 7, 8193]
 define.SIZE2 = [32, 8192, 131072, 0, 7, 8193]
 define.CHUNKSIZE = [31, 16, 1]
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
 
     // write
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "avacado",
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "avacado",
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_EXCL) => 0;
     srand(1);
-    for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE1-i);
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             buffer[b] = rand() & 0xff;
         }
-        lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
+        lfs2_file_write(&lfs2, &file, buffer, chunk) => chunk;
     }
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
     // read
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => SIZE1;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "avacado", LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => SIZE1;
     srand(1);
-    for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
-        lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE1-i);
+        lfs2_file_read(&lfs2, &file, buffer, chunk) => chunk;
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             assert(buffer[b] == (rand() & 0xff));
         }
     }
-    lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, CHUNKSIZE) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
     // rewrite
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "avacado", LFS_O_WRONLY) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "avacado", LFS2_O_WRONLY) => 0;
     srand(2);
-    for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE2-i);
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             buffer[b] = rand() & 0xff;
         }
-        lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
+        lfs2_file_write(&lfs2, &file, buffer, chunk) => chunk;
     }
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
     // read
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => lfs_max(SIZE1, SIZE2);
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "avacado", LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => lfs2_max(SIZE1, SIZE2);
     srand(2);
-    for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
-        lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE2-i);
+        lfs2_file_read(&lfs2, &file, buffer, chunk) => chunk;
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             assert(buffer[b] == (rand() & 0xff));
         }
     }
     if (SIZE1 > SIZE2) {
         srand(1);
-        for (lfs_size_t b = 0; b < SIZE2; b++) {
+        for (lfs2_size_t b = 0; b < SIZE2; b++) {
             rand();
         }
-        for (lfs_size_t i = SIZE2; i < SIZE1; i += CHUNKSIZE) {
-            lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
-            lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
-            for (lfs_size_t b = 0; b < chunk; b++) {
+        for (lfs2_size_t i = SIZE2; i < SIZE1; i += CHUNKSIZE) {
+            lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE1-i);
+            lfs2_file_read(&lfs2, &file, buffer, chunk) => chunk;
+            for (lfs2_size_t b = 0; b < chunk; b++) {
                 assert(buffer[b] == (rand() & 0xff));
             }
         }
     }
-    lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, CHUNKSIZE) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # appending files
@@ -144,76 +144,76 @@ define.SIZE1 = [32, 8192, 131072, 0, 7, 8193]
 define.SIZE2 = [32, 8192, 131072, 0, 7, 8193]
 define.CHUNKSIZE = [31, 16, 1]
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
 
     // write
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "avacado",
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "avacado",
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_EXCL) => 0;
     srand(1);
-    for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE1-i);
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             buffer[b] = rand() & 0xff;
         }
-        lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
+        lfs2_file_write(&lfs2, &file, buffer, chunk) => chunk;
     }
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
     // read
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => SIZE1;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "avacado", LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => SIZE1;
     srand(1);
-    for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
-        lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE1-i);
+        lfs2_file_read(&lfs2, &file, buffer, chunk) => chunk;
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             assert(buffer[b] == (rand() & 0xff));
         }
     }
-    lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, CHUNKSIZE) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
     // append
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "avacado", LFS_O_WRONLY | LFS_O_APPEND) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "avacado", LFS2_O_WRONLY | LFS2_O_APPEND) => 0;
     srand(2);
-    for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE2-i);
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             buffer[b] = rand() & 0xff;
         }
-        lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
+        lfs2_file_write(&lfs2, &file, buffer, chunk) => chunk;
     }
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
     // read
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => SIZE1 + SIZE2;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "avacado", LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => SIZE1 + SIZE2;
     srand(1);
-    for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
-        lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE1-i);
+        lfs2_file_read(&lfs2, &file, buffer, chunk) => chunk;
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             assert(buffer[b] == (rand() & 0xff));
         }
     }
     srand(2);
-    for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
-        lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE2-i);
+        lfs2_file_read(&lfs2, &file, buffer, chunk) => chunk;
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             assert(buffer[b] == (rand() & 0xff));
         }
     }
-    lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, CHUNKSIZE) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # truncating files
@@ -221,68 +221,68 @@ define.SIZE1 = [32, 8192, 131072, 0, 7, 8193]
 define.SIZE2 = [32, 8192, 131072, 0, 7, 8193]
 define.CHUNKSIZE = [31, 16, 1]
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
 
     // write
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "avacado",
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "avacado",
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_EXCL) => 0;
     srand(1);
-    for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE1-i);
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             buffer[b] = rand() & 0xff;
         }
-        lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
+        lfs2_file_write(&lfs2, &file, buffer, chunk) => chunk;
     }
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
     // read
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => SIZE1;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "avacado", LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => SIZE1;
     srand(1);
-    for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
-        lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE1-i);
+        lfs2_file_read(&lfs2, &file, buffer, chunk) => chunk;
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             assert(buffer[b] == (rand() & 0xff));
         }
     }
-    lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, CHUNKSIZE) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
     // truncate
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "avacado", LFS_O_WRONLY | LFS_O_TRUNC) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "avacado", LFS2_O_WRONLY | LFS2_O_TRUNC) => 0;
     srand(2);
-    for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE2-i);
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             buffer[b] = rand() & 0xff;
         }
-        lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
+        lfs2_file_write(&lfs2, &file, buffer, chunk) => chunk;
     }
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
     // read
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => SIZE2;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "avacado", LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => SIZE2;
     srand(2);
-    for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
-        lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE2-i);
+        lfs2_file_read(&lfs2, &file, buffer, chunk) => chunk;
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             assert(buffer[b] == (rand() & 0xff));
         }
     }
-    lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, CHUNKSIZE) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # reentrant file writing
@@ -290,197 +290,197 @@ define.SIZE = [32, 0, 7, 2049]
 define.CHUNKSIZE = [31, 16, 65]
 reentrant = true
 code = '''
-    err = lfs_mount(&lfs, &cfg);
+    err = lfs2_mount(&lfs2, &cfg);
     if (err) {
-        lfs_format(&lfs, &cfg) => 0;
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_format(&lfs2, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
     }
 
-    err = lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY);
-    assert(err == LFS_ERR_NOENT || err == 0);
+    err = lfs2_file_open(&lfs2, &file, "avacado", LFS2_O_RDONLY);
+    assert(err == LFS2_ERR_NOENT || err == 0);
     if (err == 0) {
         // can only be 0 (new file) or full size
-        size = lfs_file_size(&lfs, &file);
+        size = lfs2_file_size(&lfs2, &file);
         assert(size == 0 || size == SIZE);
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
 
     // write
-    lfs_file_open(&lfs, &file, "avacado", LFS_O_WRONLY | LFS_O_CREAT) => 0;
+    lfs2_file_open(&lfs2, &file, "avacado", LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
     srand(1);
-    for (lfs_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE-i);
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             buffer[b] = rand() & 0xff;
         }
-        lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
+        lfs2_file_write(&lfs2, &file, buffer, chunk) => chunk;
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // read
-    lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => SIZE;
+    lfs2_file_open(&lfs2, &file, "avacado", LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => SIZE;
     srand(1);
-    for (lfs_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
-        lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE-i);
+        lfs2_file_read(&lfs2, &file, buffer, chunk) => chunk;
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             assert(buffer[b] == (rand() & 0xff));
         }
     }
-    lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, CHUNKSIZE) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # reentrant file writing with syncs
 define = [
     # append (O(n))
-    {MODE='LFS_O_APPEND',   SIZE=[32, 0, 7, 2049],  CHUNKSIZE=[31, 16, 65]},
+    {MODE='LFS2_O_APPEND',   SIZE=[32, 0, 7, 2049],  CHUNKSIZE=[31, 16, 65]},
     # truncate (O(n^2))
-    {MODE='LFS_O_TRUNC',    SIZE=[32, 0, 7, 200],   CHUNKSIZE=[31, 16, 65]},
+    {MODE='LFS2_O_TRUNC',    SIZE=[32, 0, 7, 200],   CHUNKSIZE=[31, 16, 65]},
     # rewrite (O(n^2))
     {MODE=0,                SIZE=[32, 0, 7, 200],   CHUNKSIZE=[31, 16, 65]},
 ]
 reentrant = true
 code = '''
-    err = lfs_mount(&lfs, &cfg);
+    err = lfs2_mount(&lfs2, &cfg);
     if (err) {
-        lfs_format(&lfs, &cfg) => 0;
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_format(&lfs2, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
     }
 
-    err = lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY);
-    assert(err == LFS_ERR_NOENT || err == 0);
+    err = lfs2_file_open(&lfs2, &file, "avacado", LFS2_O_RDONLY);
+    assert(err == LFS2_ERR_NOENT || err == 0);
     if (err == 0) {
         // with syncs we could be any size, but it at least must be valid data
-        size = lfs_file_size(&lfs, &file);
+        size = lfs2_file_size(&lfs2, &file);
         assert(size <= SIZE);
         srand(1);
-        for (lfs_size_t i = 0; i < size; i += CHUNKSIZE) {
-            lfs_size_t chunk = lfs_min(CHUNKSIZE, size-i);
-            lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
-            for (lfs_size_t b = 0; b < chunk; b++) {
+        for (lfs2_size_t i = 0; i < size; i += CHUNKSIZE) {
+            lfs2_size_t chunk = lfs2_min(CHUNKSIZE, size-i);
+            lfs2_file_read(&lfs2, &file, buffer, chunk) => chunk;
+            for (lfs2_size_t b = 0; b < chunk; b++) {
                 assert(buffer[b] == (rand() & 0xff));
             }
         }
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
 
     // write
-    lfs_file_open(&lfs, &file, "avacado",
-        LFS_O_WRONLY | LFS_O_CREAT | MODE) => 0;
-    size = lfs_file_size(&lfs, &file);
+    lfs2_file_open(&lfs2, &file, "avacado",
+        LFS2_O_WRONLY | LFS2_O_CREAT | MODE) => 0;
+    size = lfs2_file_size(&lfs2, &file);
     assert(size <= SIZE);
     srand(1);
-    lfs_size_t skip = (MODE == LFS_O_APPEND) ? size : 0;
-    for (lfs_size_t b = 0; b < skip; b++) {
+    lfs2_size_t skip = (MODE == LFS2_O_APPEND) ? size : 0;
+    for (lfs2_size_t b = 0; b < skip; b++) {
         rand();
     }
-    for (lfs_size_t i = skip; i < SIZE; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = skip; i < SIZE; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE-i);
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             buffer[b] = rand() & 0xff;
         }
-        lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
-        lfs_file_sync(&lfs, &file) => 0;
+        lfs2_file_write(&lfs2, &file, buffer, chunk) => chunk;
+        lfs2_file_sync(&lfs2, &file) => 0;
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     // read
-    lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => SIZE;
+    lfs2_file_open(&lfs2, &file, "avacado", LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => SIZE;
     srand(1);
-    for (lfs_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
-        lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
-        lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
-        for (lfs_size_t b = 0; b < chunk; b++) {
+    for (lfs2_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
+        lfs2_size_t chunk = lfs2_min(CHUNKSIZE, SIZE-i);
+        lfs2_file_read(&lfs2, &file, buffer, chunk) => chunk;
+        for (lfs2_size_t b = 0; b < chunk; b++) {
             assert(buffer[b] == (rand() & 0xff));
         }
     }
-    lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, CHUNKSIZE) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # many files
 define.N = 300
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
     // create N files of 7 bytes
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (int i = 0; i < N; i++) {
         sprintf(path, "file_%03d", i);
-        lfs_file_open(&lfs, &file, path,
-                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
+        lfs2_file_open(&lfs2, &file, path,
+                LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_EXCL) => 0;
         char wbuffer[1024];
         size = 7;
         snprintf(wbuffer, size, "Hi %03d", i);
-        lfs_file_write(&lfs, &file, wbuffer, size) => size;
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+        lfs2_file_close(&lfs2, &file) => 0;
 
         char rbuffer[1024];
-        lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-        lfs_file_read(&lfs, &file, rbuffer, size) => size;
+        lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+        lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
         assert(strcmp(rbuffer, wbuffer) == 0);
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # many files with power cycle
 define.N = 300
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
     // create N files of 7 bytes
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (int i = 0; i < N; i++) {
         sprintf(path, "file_%03d", i);
-        lfs_file_open(&lfs, &file, path,
-                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
+        lfs2_file_open(&lfs2, &file, path,
+                LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_EXCL) => 0;
         char wbuffer[1024];
         size = 7;
         snprintf(wbuffer, size, "Hi %03d", i);
-        lfs_file_write(&lfs, &file, wbuffer, size) => size;
-        lfs_file_close(&lfs, &file) => 0;
-        lfs_unmount(&lfs) => 0;
+        lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
+        lfs2_file_close(&lfs2, &file) => 0;
+        lfs2_unmount(&lfs2) => 0;
 
         char rbuffer[1024];
-        lfs_mount(&lfs, &cfg) => 0;
-        lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-        lfs_file_read(&lfs, &file, rbuffer, size) => size;
+        lfs2_mount(&lfs2, &cfg) => 0;
+        lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+        lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
         assert(strcmp(rbuffer, wbuffer) == 0);
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # many files with power loss
 define.N = 300
 reentrant = true
 code = '''
-    err = lfs_mount(&lfs, &cfg);
+    err = lfs2_mount(&lfs2, &cfg);
     if (err) {
-        lfs_format(&lfs, &cfg) => 0;
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_format(&lfs2, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
     }
     // create N files of 7 bytes
     for (int i = 0; i < N; i++) {
         sprintf(path, "file_%03d", i);
-        err = lfs_file_open(&lfs, &file, path, LFS_O_WRONLY | LFS_O_CREAT);
+        err = lfs2_file_open(&lfs2, &file, path, LFS2_O_WRONLY | LFS2_O_CREAT);
         char wbuffer[1024];
         size = 7;
         snprintf(wbuffer, size, "Hi %03d", i);
-        if ((lfs_size_t)lfs_file_size(&lfs, &file) != size) {
-            lfs_file_write(&lfs, &file, wbuffer, size) => size;
+        if ((lfs2_size_t)lfs2_file_size(&lfs2, &file) != size) {
+            lfs2_file_write(&lfs2, &file, wbuffer, size) => size;
         }
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
 
         char rbuffer[1024];
-        lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-        lfs_file_read(&lfs, &file, rbuffer, size) => size;
+        lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+        lfs2_file_read(&lfs2, &file, rbuffer, size) => size;
         assert(strcmp(rbuffer, wbuffer) == 0);
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''

tests/test_interspersed.toml

@@ -3,60 +3,60 @@
 define.SIZE = [10, 100]
 define.FILES = [4, 10, 26] 
 code = '''
-    lfs_file_t files[FILES];
+    lfs2_file_t files[FILES];
     const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (int j = 0; j < FILES; j++) {
         sprintf(path, "%c", alphas[j]);
-        lfs_file_open(&lfs, &files[j], path,
-                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
+        lfs2_file_open(&lfs2, &files[j], path,
+                LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_EXCL) => 0;
     }
 
     for (int i = 0; i < SIZE; i++) {
         for (int j = 0; j < FILES; j++) {
-            lfs_file_write(&lfs, &files[j], &alphas[j], 1) => 1;
+            lfs2_file_write(&lfs2, &files[j], &alphas[j], 1) => 1;
         }
     }
 
     for (int j = 0; j < FILES; j++) {
-        lfs_file_close(&lfs, &files[j]);
+        lfs2_file_close(&lfs2, &files[j]);
     }
 
-    lfs_dir_open(&lfs, &dir, "/") => 0;
-    lfs_dir_read(&lfs, &dir, &info) => 1;
+    lfs2_dir_open(&lfs2, &dir, "/") => 0;
+    lfs2_dir_read(&lfs2, &dir, &info) => 1;
     assert(strcmp(info.name, ".") == 0);
-    assert(info.type == LFS_TYPE_DIR);
-    lfs_dir_read(&lfs, &dir, &info) => 1;
+    assert(info.type == LFS2_TYPE_DIR);
+    lfs2_dir_read(&lfs2, &dir, &info) => 1;
     assert(strcmp(info.name, "..") == 0);
-    assert(info.type == LFS_TYPE_DIR);
+    assert(info.type == LFS2_TYPE_DIR);
     for (int j = 0; j < FILES; j++) {
         sprintf(path, "%c", alphas[j]);
-        lfs_dir_read(&lfs, &dir, &info) => 1;
+        lfs2_dir_read(&lfs2, &dir, &info) => 1;
         assert(strcmp(info.name, path) == 0);
-        assert(info.type == LFS_TYPE_REG);
+        assert(info.type == LFS2_TYPE_REG);
         assert(info.size == SIZE);
     }
-    lfs_dir_read(&lfs, &dir, &info) => 0;
-    lfs_dir_close(&lfs, &dir) => 0;
+    lfs2_dir_read(&lfs2, &dir, &info) => 0;
+    lfs2_dir_close(&lfs2, &dir) => 0;
 
     for (int j = 0; j < FILES; j++) {
         sprintf(path, "%c", alphas[j]);
-        lfs_file_open(&lfs, &files[j], path, LFS_O_RDONLY) => 0;
+        lfs2_file_open(&lfs2, &files[j], path, LFS2_O_RDONLY) => 0;
     }
 
     for (int i = 0; i < 10; i++) {
         for (int j = 0; j < FILES; j++) {
-            lfs_file_read(&lfs, &files[j], buffer, 1) => 1;
+            lfs2_file_read(&lfs2, &files[j], buffer, 1) => 1;
             assert(buffer[0] == alphas[j]);
         }
     }
 
     for (int j = 0; j < FILES; j++) {
-        lfs_file_close(&lfs, &files[j]);
+        lfs2_file_close(&lfs2, &files[j]);
     }
     
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # interspersed remove file test
@@ -64,112 +64,112 @@ define.SIZE = [10, 100]
 define.FILES = [4, 10, 26]
 code = '''
     const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (int j = 0; j < FILES; j++) {
         sprintf(path, "%c", alphas[j]);
-        lfs_file_open(&lfs, &file, path,
-                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
+        lfs2_file_open(&lfs2, &file, path,
+                LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_EXCL) => 0;
         for (int i = 0; i < SIZE; i++) {
-            lfs_file_write(&lfs, &file, &alphas[j], 1) => 1;
+            lfs2_file_write(&lfs2, &file, &alphas[j], 1) => 1;
         }
-        lfs_file_close(&lfs, &file);
+        lfs2_file_close(&lfs2, &file);
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "zzz", LFS_O_WRONLY | LFS_O_CREAT) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "zzz", LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
     for (int j = 0; j < FILES; j++) {
-        lfs_file_write(&lfs, &file, (const void*)"~", 1) => 1;
-        lfs_file_sync(&lfs, &file) => 0;
+        lfs2_file_write(&lfs2, &file, (const void*)"~", 1) => 1;
+        lfs2_file_sync(&lfs2, &file) => 0;
 
         sprintf(path, "%c", alphas[j]);
-        lfs_remove(&lfs, path) => 0;
+        lfs2_remove(&lfs2, path) => 0;
     }
-    lfs_file_close(&lfs, &file);
+    lfs2_file_close(&lfs2, &file);
 
-    lfs_dir_open(&lfs, &dir, "/") => 0;
-    lfs_dir_read(&lfs, &dir, &info) => 1;
+    lfs2_dir_open(&lfs2, &dir, "/") => 0;
+    lfs2_dir_read(&lfs2, &dir, &info) => 1;
     assert(strcmp(info.name, ".") == 0);
-    assert(info.type == LFS_TYPE_DIR);
-    lfs_dir_read(&lfs, &dir, &info) => 1;
+    assert(info.type == LFS2_TYPE_DIR);
+    lfs2_dir_read(&lfs2, &dir, &info) => 1;
     assert(strcmp(info.name, "..") == 0);
-    assert(info.type == LFS_TYPE_DIR);
-    lfs_dir_read(&lfs, &dir, &info) => 1;
+    assert(info.type == LFS2_TYPE_DIR);
+    lfs2_dir_read(&lfs2, &dir, &info) => 1;
     assert(strcmp(info.name, "zzz") == 0);
-    assert(info.type == LFS_TYPE_REG);
+    assert(info.type == LFS2_TYPE_REG);
     assert(info.size == FILES);
-    lfs_dir_read(&lfs, &dir, &info) => 0;
-    lfs_dir_close(&lfs, &dir) => 0;
+    lfs2_dir_read(&lfs2, &dir, &info) => 0;
+    lfs2_dir_close(&lfs2, &dir) => 0;
 
-    lfs_file_open(&lfs, &file, "zzz", LFS_O_RDONLY) => 0;
+    lfs2_file_open(&lfs2, &file, "zzz", LFS2_O_RDONLY) => 0;
     for (int i = 0; i < FILES; i++) {
-        lfs_file_read(&lfs, &file, buffer, 1) => 1;
+        lfs2_file_read(&lfs2, &file, buffer, 1) => 1;
         assert(buffer[0] == '~');
     }
-    lfs_file_close(&lfs, &file);
+    lfs2_file_close(&lfs2, &file);
     
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # remove inconveniently test
 define.SIZE = [10, 100]
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_t files[3];
-    lfs_file_open(&lfs, &files[0], "e", LFS_O_WRONLY | LFS_O_CREAT) => 0;
-    lfs_file_open(&lfs, &files[1], "f", LFS_O_WRONLY | LFS_O_CREAT) => 0;
-    lfs_file_open(&lfs, &files[2], "g", LFS_O_WRONLY | LFS_O_CREAT) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_t files[3];
+    lfs2_file_open(&lfs2, &files[0], "e", LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    lfs2_file_open(&lfs2, &files[1], "f", LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    lfs2_file_open(&lfs2, &files[2], "g", LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
 
     for (int i = 0; i < SIZE/2; i++) {
-        lfs_file_write(&lfs, &files[0], (const void*)"e", 1) => 1;
-        lfs_file_write(&lfs, &files[1], (const void*)"f", 1) => 1;
-        lfs_file_write(&lfs, &files[2], (const void*)"g", 1) => 1;
+        lfs2_file_write(&lfs2, &files[0], (const void*)"e", 1) => 1;
+        lfs2_file_write(&lfs2, &files[1], (const void*)"f", 1) => 1;
+        lfs2_file_write(&lfs2, &files[2], (const void*)"g", 1) => 1;
     }
 
-    lfs_remove(&lfs, "f") => 0;
+    lfs2_remove(&lfs2, "f") => 0;
 
     for (int i = 0; i < SIZE/2; i++) {
-        lfs_file_write(&lfs, &files[0], (const void*)"e", 1) => 1;
-        lfs_file_write(&lfs, &files[1], (const void*)"f", 1) => 1;
-        lfs_file_write(&lfs, &files[2], (const void*)"g", 1) => 1;
+        lfs2_file_write(&lfs2, &files[0], (const void*)"e", 1) => 1;
+        lfs2_file_write(&lfs2, &files[1], (const void*)"f", 1) => 1;
+        lfs2_file_write(&lfs2, &files[2], (const void*)"g", 1) => 1;
     }
 
-    lfs_file_close(&lfs, &files[0]);
-    lfs_file_close(&lfs, &files[1]);
-    lfs_file_close(&lfs, &files[2]);
+    lfs2_file_close(&lfs2, &files[0]);
+    lfs2_file_close(&lfs2, &files[1]);
+    lfs2_file_close(&lfs2, &files[2]);
 
-    lfs_dir_open(&lfs, &dir, "/") => 0;
-    lfs_dir_read(&lfs, &dir, &info) => 1;
+    lfs2_dir_open(&lfs2, &dir, "/") => 0;
+    lfs2_dir_read(&lfs2, &dir, &info) => 1;
     assert(strcmp(info.name, ".") == 0);
-    assert(info.type == LFS_TYPE_DIR);
-    lfs_dir_read(&lfs, &dir, &info) => 1;
+    assert(info.type == LFS2_TYPE_DIR);
+    lfs2_dir_read(&lfs2, &dir, &info) => 1;
     assert(strcmp(info.name, "..") == 0);
-    assert(info.type == LFS_TYPE_DIR);
-    lfs_dir_read(&lfs, &dir, &info) => 1;
+    assert(info.type == LFS2_TYPE_DIR);
+    lfs2_dir_read(&lfs2, &dir, &info) => 1;
     assert(strcmp(info.name, "e") == 0);
-    assert(info.type == LFS_TYPE_REG);
+    assert(info.type == LFS2_TYPE_REG);
     assert(info.size == SIZE);
-    lfs_dir_read(&lfs, &dir, &info) => 1;
+    lfs2_dir_read(&lfs2, &dir, &info) => 1;
     assert(strcmp(info.name, "g") == 0);
-    assert(info.type == LFS_TYPE_REG);
+    assert(info.type == LFS2_TYPE_REG);
     assert(info.size == SIZE);
-    lfs_dir_read(&lfs, &dir, &info) => 0;
-    lfs_dir_close(&lfs, &dir) => 0;
+    lfs2_dir_read(&lfs2, &dir, &info) => 0;
+    lfs2_dir_close(&lfs2, &dir) => 0;
 
-    lfs_file_open(&lfs, &files[0], "e", LFS_O_RDONLY) => 0;
-    lfs_file_open(&lfs, &files[1], "g", LFS_O_RDONLY) => 0;
+    lfs2_file_open(&lfs2, &files[0], "e", LFS2_O_RDONLY) => 0;
+    lfs2_file_open(&lfs2, &files[1], "g", LFS2_O_RDONLY) => 0;
     for (int i = 0; i < SIZE; i++) {
-        lfs_file_read(&lfs, &files[0], buffer, 1) => 1;
+        lfs2_file_read(&lfs2, &files[0], buffer, 1) => 1;
         assert(buffer[0] == 'e');
-        lfs_file_read(&lfs, &files[1], buffer, 1) => 1;
+        lfs2_file_read(&lfs2, &files[1], buffer, 1) => 1;
         assert(buffer[0] == 'g');
     }
-    lfs_file_close(&lfs, &files[0]);
-    lfs_file_close(&lfs, &files[1]);
+    lfs2_file_close(&lfs2, &files[0]);
+    lfs2_file_close(&lfs2, &files[1]);
     
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # reentrant interspersed file test
@@ -177,68 +177,68 @@ define.SIZE = [10, 100]
 define.FILES = [4, 10, 26] 
 reentrant = true
 code = '''
-    lfs_file_t files[FILES];
+    lfs2_file_t files[FILES];
     const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
 
-    err = lfs_mount(&lfs, &cfg);
+    err = lfs2_mount(&lfs2, &cfg);
     if (err) {
-        lfs_format(&lfs, &cfg) => 0;
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_format(&lfs2, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
     }
 
     for (int j = 0; j < FILES; j++) {
         sprintf(path, "%c", alphas[j]);
-        lfs_file_open(&lfs, &files[j], path,
-                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
+        lfs2_file_open(&lfs2, &files[j], path,
+                LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_APPEND) => 0;
     }
 
     for (int i = 0; i < SIZE; i++) {
         for (int j = 0; j < FILES; j++) {
-            size = lfs_file_size(&lfs, &files[j]);
+            size = lfs2_file_size(&lfs2, &files[j]);
             assert((int)size >= 0);
             if ((int)size <= i) {
-                lfs_file_write(&lfs, &files[j], &alphas[j], 1) => 1;
-                lfs_file_sync(&lfs, &files[j]) => 0;
+                lfs2_file_write(&lfs2, &files[j], &alphas[j], 1) => 1;
+                lfs2_file_sync(&lfs2, &files[j]) => 0;
             }
         }
     }
 
     for (int j = 0; j < FILES; j++) {
-        lfs_file_close(&lfs, &files[j]);
+        lfs2_file_close(&lfs2, &files[j]);
     }
 
-    lfs_dir_open(&lfs, &dir, "/") => 0;
-    lfs_dir_read(&lfs, &dir, &info) => 1;
+    lfs2_dir_open(&lfs2, &dir, "/") => 0;
+    lfs2_dir_read(&lfs2, &dir, &info) => 1;
     assert(strcmp(info.name, ".") == 0);
-    assert(info.type == LFS_TYPE_DIR);
-    lfs_dir_read(&lfs, &dir, &info) => 1;
+    assert(info.type == LFS2_TYPE_DIR);
+    lfs2_dir_read(&lfs2, &dir, &info) => 1;
     assert(strcmp(info.name, "..") == 0);
-    assert(info.type == LFS_TYPE_DIR);
+    assert(info.type == LFS2_TYPE_DIR);
     for (int j = 0; j < FILES; j++) {
         sprintf(path, "%c", alphas[j]);
-        lfs_dir_read(&lfs, &dir, &info) => 1;
+        lfs2_dir_read(&lfs2, &dir, &info) => 1;
         assert(strcmp(info.name, path) == 0);
-        assert(info.type == LFS_TYPE_REG);
+        assert(info.type == LFS2_TYPE_REG);
         assert(info.size == SIZE);
     }
-    lfs_dir_read(&lfs, &dir, &info) => 0;
-    lfs_dir_close(&lfs, &dir) => 0;
+    lfs2_dir_read(&lfs2, &dir, &info) => 0;
+    lfs2_dir_close(&lfs2, &dir) => 0;
 
     for (int j = 0; j < FILES; j++) {
         sprintf(path, "%c", alphas[j]);
-        lfs_file_open(&lfs, &files[j], path, LFS_O_RDONLY) => 0;
+        lfs2_file_open(&lfs2, &files[j], path, LFS2_O_RDONLY) => 0;
     }
 
     for (int i = 0; i < 10; i++) {
         for (int j = 0; j < FILES; j++) {
-            lfs_file_read(&lfs, &files[j], buffer, 1) => 1;
+            lfs2_file_read(&lfs2, &files[j], buffer, 1) => 1;
             assert(buffer[0] == alphas[j]);
         }
     }
 
     for (int j = 0; j < FILES; j++) {
-        lfs_file_close(&lfs, &files[j]);
+        lfs2_file_close(&lfs2, &files[j]);
     }
     
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''

tests/test_orphans.toml

@@ -1,75 +1,75 @@
 [[case]] # orphan test
-in = "lfs.c"
-if = 'LFS_PROG_SIZE <= 0x3fe' # only works with one crc per commit
+in = "lfs2.c"
+if = 'LFS2_PROG_SIZE <= 0x3fe' # only works with one crc per commit
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "parent") => 0;
-    lfs_mkdir(&lfs, "parent/orphan") => 0;
-    lfs_mkdir(&lfs, "parent/child") => 0;
-    lfs_remove(&lfs, "parent/orphan") => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "parent") => 0;
+    lfs2_mkdir(&lfs2, "parent/orphan") => 0;
+    lfs2_mkdir(&lfs2, "parent/child") => 0;
+    lfs2_remove(&lfs2, "parent/orphan") => 0;
+    lfs2_unmount(&lfs2) => 0;
 
     // corrupt the child's most recent commit, this should be the update
     // to the linked-list entry, which should orphan the orphan. Note this
     // makes a lot of assumptions about the remove operation.
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_dir_open(&lfs, &dir, "parent/child") => 0;
-    lfs_block_t block = dir.m.pair[0];
-    lfs_dir_close(&lfs, &dir) => 0;
-    lfs_unmount(&lfs) => 0;
-    uint8_t bbuffer[LFS_BLOCK_SIZE];
-    cfg.read(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
-    int off = LFS_BLOCK_SIZE-1;
-    while (off >= 0 && bbuffer[off] == LFS_ERASE_VALUE) {
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_dir_open(&lfs2, &dir, "parent/child") => 0;
+    lfs2_block_t block = dir.m.pair[0];
+    lfs2_dir_close(&lfs2, &dir) => 0;
+    lfs2_unmount(&lfs2) => 0;
+    uint8_t bbuffer[LFS2_BLOCK_SIZE];
+    cfg.read(&cfg, block, 0, bbuffer, LFS2_BLOCK_SIZE) => 0;
+    int off = LFS2_BLOCK_SIZE-1;
+    while (off >= 0 && bbuffer[off] == LFS2_ERASE_VALUE) {
         off -= 1;
     }
-    memset(&bbuffer[off-3], LFS_BLOCK_SIZE, 3);
+    memset(&bbuffer[off-3], LFS2_BLOCK_SIZE, 3);
     cfg.erase(&cfg, block) => 0;
-    cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
+    cfg.prog(&cfg, block, 0, bbuffer, LFS2_BLOCK_SIZE) => 0;
     cfg.sync(&cfg) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_stat(&lfs, "parent/orphan", &info) => LFS_ERR_NOENT;
-    lfs_stat(&lfs, "parent/child", &info) => 0;
-    lfs_fs_size(&lfs) => 8;
-    lfs_unmount(&lfs) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_stat(&lfs2, "parent/orphan", &info) => LFS2_ERR_NOENT;
+    lfs2_stat(&lfs2, "parent/child", &info) => 0;
+    lfs2_fs_size(&lfs2) => 8;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_stat(&lfs, "parent/orphan", &info) => LFS_ERR_NOENT;
-    lfs_stat(&lfs, "parent/child", &info) => 0;
-    lfs_fs_size(&lfs) => 8;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_stat(&lfs2, "parent/orphan", &info) => LFS2_ERR_NOENT;
+    lfs2_stat(&lfs2, "parent/child", &info) => 0;
+    lfs2_fs_size(&lfs2) => 8;
     // this mkdir should both create a dir and deorphan, so size
     // should be unchanged
-    lfs_mkdir(&lfs, "parent/otherchild") => 0;
-    lfs_stat(&lfs, "parent/orphan", &info) => LFS_ERR_NOENT;
-    lfs_stat(&lfs, "parent/child", &info) => 0;
-    lfs_stat(&lfs, "parent/otherchild", &info) => 0;
-    lfs_fs_size(&lfs) => 8;
-    lfs_unmount(&lfs) => 0;
+    lfs2_mkdir(&lfs2, "parent/otherchild") => 0;
+    lfs2_stat(&lfs2, "parent/orphan", &info) => LFS2_ERR_NOENT;
+    lfs2_stat(&lfs2, "parent/child", &info) => 0;
+    lfs2_stat(&lfs2, "parent/otherchild", &info) => 0;
+    lfs2_fs_size(&lfs2) => 8;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_stat(&lfs, "parent/orphan", &info) => LFS_ERR_NOENT;
-    lfs_stat(&lfs, "parent/child", &info) => 0;
-    lfs_stat(&lfs, "parent/otherchild", &info) => 0;
-    lfs_fs_size(&lfs) => 8;
-    lfs_unmount(&lfs) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_stat(&lfs2, "parent/orphan", &info) => LFS2_ERR_NOENT;
+    lfs2_stat(&lfs2, "parent/child", &info) => 0;
+    lfs2_stat(&lfs2, "parent/otherchild", &info) => 0;
+    lfs2_fs_size(&lfs2) => 8;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # reentrant testing for orphans, basically just spam mkdir/remove
 reentrant = true
 # TODO fix this case, caused by non-DAG trees
-#if = '!(DEPTH == 3 && LFS_CACHE_SIZE != 64)'
+if = '!(DEPTH == 3 && LFS2_CACHE_SIZE != 64)'
 define = [
     {FILES=6,  DEPTH=1, CYCLES=20},
     {FILES=26, DEPTH=1, CYCLES=20},
     {FILES=3,  DEPTH=3, CYCLES=20},
 ]
 code = '''
-    err = lfs_mount(&lfs, &cfg);
+    err = lfs2_mount(&lfs2, &cfg);
     if (err) {
-        lfs_format(&lfs, &cfg) => 0;
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_format(&lfs2, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
     }
 
     srand(1);
@@ -82,39 +82,39 @@ code = '''
         }
 
         // if it does not exist, we create it, else we destroy
-        int res = lfs_stat(&lfs, full_path, &info);
-        if (res == LFS_ERR_NOENT) {
+        int res = lfs2_stat(&lfs2, full_path, &info);
+        if (res == LFS2_ERR_NOENT) {
             // create each directory in turn, ignore if dir already exists
             for (int d = 0; d < DEPTH; d++) {
                 strcpy(path, full_path);
                 path[2*d+2] = '\0';
-                err = lfs_mkdir(&lfs, path);
-                assert(!err || err == LFS_ERR_EXIST);
+                err = lfs2_mkdir(&lfs2, path);
+                assert(!err || err == LFS2_ERR_EXIST);
             }
 
             for (int d = 0; d < DEPTH; d++) {
                 strcpy(path, full_path);
                 path[2*d+2] = '\0';
-                lfs_stat(&lfs, path, &info) => 0;
+                lfs2_stat(&lfs2, path, &info) => 0;
                 assert(strcmp(info.name, &path[2*d+1]) == 0);
-                assert(info.type == LFS_TYPE_DIR);
+                assert(info.type == LFS2_TYPE_DIR);
             }
         } else {
             // is valid dir?
             assert(strcmp(info.name, &full_path[2*(DEPTH-1)+1]) == 0);
-            assert(info.type == LFS_TYPE_DIR);
+            assert(info.type == LFS2_TYPE_DIR);
 
             // try to delete path in reverse order, ignore if dir is not empty
             for (int d = DEPTH-1; d >= 0; d--) {
                 strcpy(path, full_path);
                 path[2*d+2] = '\0';
-                err = lfs_remove(&lfs, path);
-                assert(!err || err == LFS_ERR_NOTEMPTY);
+                err = lfs2_remove(&lfs2, path);
+                assert(!err || err == LFS2_ERR_NOTEMPTY);
             }
 
-            lfs_stat(&lfs, full_path, &info) => LFS_ERR_NOENT;
+            lfs2_stat(&lfs2, full_path, &info) => LFS2_ERR_NOENT;
         }
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 

tests/test_paths.toml

@@ -1,293 +1,293 @@
 
 [[case]] # simple path test
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "tea") => 0;
-    lfs_mkdir(&lfs, "tea/hottea") => 0;
-    lfs_mkdir(&lfs, "tea/warmtea") => 0;
-    lfs_mkdir(&lfs, "tea/coldtea") => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "tea") => 0;
+    lfs2_mkdir(&lfs2, "tea/hottea") => 0;
+    lfs2_mkdir(&lfs2, "tea/warmtea") => 0;
+    lfs2_mkdir(&lfs2, "tea/coldtea") => 0;
 
-    lfs_stat(&lfs, "tea/hottea", &info) => 0;
+    lfs2_stat(&lfs2, "tea/hottea", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
-    lfs_stat(&lfs, "/tea/hottea", &info) => 0;
+    lfs2_stat(&lfs2, "/tea/hottea", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
 
-    lfs_mkdir(&lfs, "/milk") => 0;
-    lfs_stat(&lfs, "/milk", &info) => 0;
+    lfs2_mkdir(&lfs2, "/milk") => 0;
+    lfs2_stat(&lfs2, "/milk", &info) => 0;
     assert(strcmp(info.name, "milk") == 0);
-    lfs_stat(&lfs, "milk", &info) => 0;
+    lfs2_stat(&lfs2, "milk", &info) => 0;
     assert(strcmp(info.name, "milk") == 0);
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # redundant slashes
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "tea") => 0;
-    lfs_mkdir(&lfs, "tea/hottea") => 0;
-    lfs_mkdir(&lfs, "tea/warmtea") => 0;
-    lfs_mkdir(&lfs, "tea/coldtea") => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "tea") => 0;
+    lfs2_mkdir(&lfs2, "tea/hottea") => 0;
+    lfs2_mkdir(&lfs2, "tea/warmtea") => 0;
+    lfs2_mkdir(&lfs2, "tea/coldtea") => 0;
 
-    lfs_stat(&lfs, "/tea/hottea", &info) => 0;
+    lfs2_stat(&lfs2, "/tea/hottea", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
-    lfs_stat(&lfs, "//tea//hottea", &info) => 0;
+    lfs2_stat(&lfs2, "//tea//hottea", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
-    lfs_stat(&lfs, "///tea///hottea", &info) => 0;
+    lfs2_stat(&lfs2, "///tea///hottea", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
 
-    lfs_mkdir(&lfs, "////milk") => 0;
-    lfs_stat(&lfs, "////milk", &info) => 0;
+    lfs2_mkdir(&lfs2, "////milk") => 0;
+    lfs2_stat(&lfs2, "////milk", &info) => 0;
     assert(strcmp(info.name, "milk") == 0);
-    lfs_stat(&lfs, "milk", &info) => 0;
+    lfs2_stat(&lfs2, "milk", &info) => 0;
     assert(strcmp(info.name, "milk") == 0);
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # dot path test
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "tea") => 0;
-    lfs_mkdir(&lfs, "tea/hottea") => 0;
-    lfs_mkdir(&lfs, "tea/warmtea") => 0;
-    lfs_mkdir(&lfs, "tea/coldtea") => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "tea") => 0;
+    lfs2_mkdir(&lfs2, "tea/hottea") => 0;
+    lfs2_mkdir(&lfs2, "tea/warmtea") => 0;
+    lfs2_mkdir(&lfs2, "tea/coldtea") => 0;
 
-    lfs_stat(&lfs, "./tea/hottea", &info) => 0;
+    lfs2_stat(&lfs2, "./tea/hottea", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
-    lfs_stat(&lfs, "/./tea/hottea", &info) => 0;
+    lfs2_stat(&lfs2, "/./tea/hottea", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
-    lfs_stat(&lfs, "/././tea/hottea", &info) => 0;
+    lfs2_stat(&lfs2, "/././tea/hottea", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
-    lfs_stat(&lfs, "/./tea/./hottea", &info) => 0;
+    lfs2_stat(&lfs2, "/./tea/./hottea", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
 
-    lfs_mkdir(&lfs, "/./milk") => 0;
-    lfs_stat(&lfs, "/./milk", &info) => 0;
+    lfs2_mkdir(&lfs2, "/./milk") => 0;
+    lfs2_stat(&lfs2, "/./milk", &info) => 0;
     assert(strcmp(info.name, "milk") == 0);
-    lfs_stat(&lfs, "milk", &info) => 0;
+    lfs2_stat(&lfs2, "milk", &info) => 0;
     assert(strcmp(info.name, "milk") == 0);
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # dot dot path test
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "tea") => 0;
-    lfs_mkdir(&lfs, "tea/hottea") => 0;
-    lfs_mkdir(&lfs, "tea/warmtea") => 0;
-    lfs_mkdir(&lfs, "tea/coldtea") => 0;
-    lfs_mkdir(&lfs, "coffee") => 0;
-    lfs_mkdir(&lfs, "coffee/hotcoffee") => 0;
-    lfs_mkdir(&lfs, "coffee/warmcoffee") => 0;
-    lfs_mkdir(&lfs, "coffee/coldcoffee") => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "tea") => 0;
+    lfs2_mkdir(&lfs2, "tea/hottea") => 0;
+    lfs2_mkdir(&lfs2, "tea/warmtea") => 0;
+    lfs2_mkdir(&lfs2, "tea/coldtea") => 0;
+    lfs2_mkdir(&lfs2, "coffee") => 0;
+    lfs2_mkdir(&lfs2, "coffee/hotcoffee") => 0;
+    lfs2_mkdir(&lfs2, "coffee/warmcoffee") => 0;
+    lfs2_mkdir(&lfs2, "coffee/coldcoffee") => 0;
 
-    lfs_stat(&lfs, "coffee/../tea/hottea", &info) => 0;
+    lfs2_stat(&lfs2, "coffee/../tea/hottea", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
-    lfs_stat(&lfs, "tea/coldtea/../hottea", &info) => 0;
+    lfs2_stat(&lfs2, "tea/coldtea/../hottea", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
-    lfs_stat(&lfs, "coffee/coldcoffee/../../tea/hottea", &info) => 0;
+    lfs2_stat(&lfs2, "coffee/coldcoffee/../../tea/hottea", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
-    lfs_stat(&lfs, "coffee/../coffee/../tea/hottea", &info) => 0;
+    lfs2_stat(&lfs2, "coffee/../coffee/../tea/hottea", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
 
-    lfs_mkdir(&lfs, "coffee/../milk") => 0;
-    lfs_stat(&lfs, "coffee/../milk", &info) => 0;
+    lfs2_mkdir(&lfs2, "coffee/../milk") => 0;
+    lfs2_stat(&lfs2, "coffee/../milk", &info) => 0;
     strcmp(info.name, "milk") => 0;
-    lfs_stat(&lfs, "milk", &info) => 0;
+    lfs2_stat(&lfs2, "milk", &info) => 0;
     strcmp(info.name, "milk") => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # trailing dot path test
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "tea") => 0;
-    lfs_mkdir(&lfs, "tea/hottea") => 0;
-    lfs_mkdir(&lfs, "tea/warmtea") => 0;
-    lfs_mkdir(&lfs, "tea/coldtea") => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "tea") => 0;
+    lfs2_mkdir(&lfs2, "tea/hottea") => 0;
+    lfs2_mkdir(&lfs2, "tea/warmtea") => 0;
+    lfs2_mkdir(&lfs2, "tea/coldtea") => 0;
 
-    lfs_stat(&lfs, "tea/hottea/", &info) => 0;
+    lfs2_stat(&lfs2, "tea/hottea/", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
-    lfs_stat(&lfs, "tea/hottea/.", &info) => 0;
+    lfs2_stat(&lfs2, "tea/hottea/.", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
-    lfs_stat(&lfs, "tea/hottea/./.", &info) => 0;
+    lfs2_stat(&lfs2, "tea/hottea/./.", &info) => 0;
     assert(strcmp(info.name, "hottea") == 0);
-    lfs_stat(&lfs, "tea/hottea/..", &info) => 0;
+    lfs2_stat(&lfs2, "tea/hottea/..", &info) => 0;
     assert(strcmp(info.name, "tea") == 0);
-    lfs_stat(&lfs, "tea/hottea/../.", &info) => 0;
+    lfs2_stat(&lfs2, "tea/hottea/../.", &info) => 0;
     assert(strcmp(info.name, "tea") == 0);
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # leading dot path test
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, ".milk") => 0;
-    lfs_stat(&lfs, ".milk", &info) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, ".milk") => 0;
+    lfs2_stat(&lfs2, ".milk", &info) => 0;
     strcmp(info.name, ".milk") => 0;
-    lfs_stat(&lfs, "tea/.././.milk", &info) => 0;
+    lfs2_stat(&lfs2, "tea/.././.milk", &info) => 0;
     strcmp(info.name, ".milk") => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # root dot dot path test
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "tea") => 0;
-    lfs_mkdir(&lfs, "tea/hottea") => 0;
-    lfs_mkdir(&lfs, "tea/warmtea") => 0;
-    lfs_mkdir(&lfs, "tea/coldtea") => 0;
-    lfs_mkdir(&lfs, "coffee") => 0;
-    lfs_mkdir(&lfs, "coffee/hotcoffee") => 0;
-    lfs_mkdir(&lfs, "coffee/warmcoffee") => 0;
-    lfs_mkdir(&lfs, "coffee/coldcoffee") => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "tea") => 0;
+    lfs2_mkdir(&lfs2, "tea/hottea") => 0;
+    lfs2_mkdir(&lfs2, "tea/warmtea") => 0;
+    lfs2_mkdir(&lfs2, "tea/coldtea") => 0;
+    lfs2_mkdir(&lfs2, "coffee") => 0;
+    lfs2_mkdir(&lfs2, "coffee/hotcoffee") => 0;
+    lfs2_mkdir(&lfs2, "coffee/warmcoffee") => 0;
+    lfs2_mkdir(&lfs2, "coffee/coldcoffee") => 0;
 
-    lfs_stat(&lfs, "coffee/../../../../../../tea/hottea", &info) => 0;
+    lfs2_stat(&lfs2, "coffee/../../../../../../tea/hottea", &info) => 0;
     strcmp(info.name, "hottea") => 0;
 
-    lfs_mkdir(&lfs, "coffee/../../../../../../milk") => 0;
-    lfs_stat(&lfs, "coffee/../../../../../../milk", &info) => 0;
+    lfs2_mkdir(&lfs2, "coffee/../../../../../../milk") => 0;
+    lfs2_stat(&lfs2, "coffee/../../../../../../milk", &info) => 0;
     strcmp(info.name, "milk") => 0;
-    lfs_stat(&lfs, "milk", &info) => 0;
+    lfs2_stat(&lfs2, "milk", &info) => 0;
     strcmp(info.name, "milk") => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # invalid path tests
 code = '''
-    lfs_format(&lfs, &cfg);
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_stat(&lfs, "dirt", &info) => LFS_ERR_NOENT;
-    lfs_stat(&lfs, "dirt/ground", &info) => LFS_ERR_NOENT;
-    lfs_stat(&lfs, "dirt/ground/earth", &info) => LFS_ERR_NOENT;
+    lfs2_format(&lfs2, &cfg);
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_stat(&lfs2, "dirt", &info) => LFS2_ERR_NOENT;
+    lfs2_stat(&lfs2, "dirt/ground", &info) => LFS2_ERR_NOENT;
+    lfs2_stat(&lfs2, "dirt/ground/earth", &info) => LFS2_ERR_NOENT;
 
-    lfs_remove(&lfs, "dirt") => LFS_ERR_NOENT;
-    lfs_remove(&lfs, "dirt/ground") => LFS_ERR_NOENT;
-    lfs_remove(&lfs, "dirt/ground/earth") => LFS_ERR_NOENT;
+    lfs2_remove(&lfs2, "dirt") => LFS2_ERR_NOENT;
+    lfs2_remove(&lfs2, "dirt/ground") => LFS2_ERR_NOENT;
+    lfs2_remove(&lfs2, "dirt/ground/earth") => LFS2_ERR_NOENT;
 
-    lfs_mkdir(&lfs, "dirt/ground") => LFS_ERR_NOENT;
-    lfs_file_open(&lfs, &file, "dirt/ground", LFS_O_WRONLY | LFS_O_CREAT)
-            => LFS_ERR_NOENT;
-    lfs_mkdir(&lfs, "dirt/ground/earth") => LFS_ERR_NOENT;
-    lfs_file_open(&lfs, &file, "dirt/ground/earth", LFS_O_WRONLY | LFS_O_CREAT)
-            => LFS_ERR_NOENT;
-    lfs_unmount(&lfs) => 0;
+    lfs2_mkdir(&lfs2, "dirt/ground") => LFS2_ERR_NOENT;
+    lfs2_file_open(&lfs2, &file, "dirt/ground", LFS2_O_WRONLY | LFS2_O_CREAT)
+            => LFS2_ERR_NOENT;
+    lfs2_mkdir(&lfs2, "dirt/ground/earth") => LFS2_ERR_NOENT;
+    lfs2_file_open(&lfs2, &file, "dirt/ground/earth", LFS2_O_WRONLY | LFS2_O_CREAT)
+            => LFS2_ERR_NOENT;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # root operations
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_stat(&lfs, "/", &info) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_stat(&lfs2, "/", &info) => 0;
     assert(strcmp(info.name, "/") == 0);
-    assert(info.type == LFS_TYPE_DIR);
+    assert(info.type == LFS2_TYPE_DIR);
 
-    lfs_mkdir(&lfs, "/") => LFS_ERR_EXIST;
-    lfs_file_open(&lfs, &file, "/", LFS_O_WRONLY | LFS_O_CREAT)
-            => LFS_ERR_ISDIR;
+    lfs2_mkdir(&lfs2, "/") => LFS2_ERR_EXIST;
+    lfs2_file_open(&lfs2, &file, "/", LFS2_O_WRONLY | LFS2_O_CREAT)
+            => LFS2_ERR_ISDIR;
 
-    lfs_remove(&lfs, "/") => LFS_ERR_INVAL;
-    lfs_unmount(&lfs) => 0;
+    lfs2_remove(&lfs2, "/") => LFS2_ERR_INVAL;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # root representations
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_stat(&lfs, "/", &info) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_stat(&lfs2, "/", &info) => 0;
     assert(strcmp(info.name, "/") == 0);
-    assert(info.type == LFS_TYPE_DIR);
-    lfs_stat(&lfs, "", &info) => 0;
+    assert(info.type == LFS2_TYPE_DIR);
+    lfs2_stat(&lfs2, "", &info) => 0;
     assert(strcmp(info.name, "/") == 0);
-    assert(info.type == LFS_TYPE_DIR);
-    lfs_stat(&lfs, ".", &info) => 0;
+    assert(info.type == LFS2_TYPE_DIR);
+    lfs2_stat(&lfs2, ".", &info) => 0;
     assert(strcmp(info.name, "/") == 0);
-    assert(info.type == LFS_TYPE_DIR);
-    lfs_stat(&lfs, "..", &info) => 0;
+    assert(info.type == LFS2_TYPE_DIR);
+    lfs2_stat(&lfs2, "..", &info) => 0;
     assert(strcmp(info.name, "/") == 0);
-    assert(info.type == LFS_TYPE_DIR);
-    lfs_stat(&lfs, "//", &info) => 0;
+    assert(info.type == LFS2_TYPE_DIR);
+    lfs2_stat(&lfs2, "//", &info) => 0;
     assert(strcmp(info.name, "/") == 0);
-    assert(info.type == LFS_TYPE_DIR);
-    lfs_stat(&lfs, "./", &info) => 0;
+    assert(info.type == LFS2_TYPE_DIR);
+    lfs2_stat(&lfs2, "./", &info) => 0;
     assert(strcmp(info.name, "/") == 0);
-    assert(info.type == LFS_TYPE_DIR);
-    lfs_unmount(&lfs) => 0;
+    assert(info.type == LFS2_TYPE_DIR);
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # superblock conflict test
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_stat(&lfs, "littlefs", &info) => LFS_ERR_NOENT;
-    lfs_remove(&lfs, "littlefs") => LFS_ERR_NOENT;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_stat(&lfs2, "littlefs", &info) => LFS2_ERR_NOENT;
+    lfs2_remove(&lfs2, "littlefs") => LFS2_ERR_NOENT;
 
-    lfs_mkdir(&lfs, "littlefs") => 0;
-    lfs_stat(&lfs, "littlefs", &info) => 0;
+    lfs2_mkdir(&lfs2, "littlefs") => 0;
+    lfs2_stat(&lfs2, "littlefs", &info) => 0;
     assert(strcmp(info.name, "littlefs") == 0);
-    assert(info.type == LFS_TYPE_DIR);
-    lfs_remove(&lfs, "littlefs") => 0;
-    lfs_stat(&lfs, "littlefs", &info) => LFS_ERR_NOENT;
-    lfs_unmount(&lfs) => 0;
+    assert(info.type == LFS2_TYPE_DIR);
+    lfs2_remove(&lfs2, "littlefs") => 0;
+    lfs2_stat(&lfs2, "littlefs", &info) => LFS2_ERR_NOENT;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # max path test
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "coffee") => 0;
-    lfs_mkdir(&lfs, "coffee/hotcoffee") => 0;
-    lfs_mkdir(&lfs, "coffee/warmcoffee") => 0;
-    lfs_mkdir(&lfs, "coffee/coldcoffee") => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "coffee") => 0;
+    lfs2_mkdir(&lfs2, "coffee/hotcoffee") => 0;
+    lfs2_mkdir(&lfs2, "coffee/warmcoffee") => 0;
+    lfs2_mkdir(&lfs2, "coffee/coldcoffee") => 0;
 
-    memset(path, 'w', LFS_NAME_MAX+1);
-    path[LFS_NAME_MAX+1] = '\0';
-    lfs_mkdir(&lfs, path) => LFS_ERR_NAMETOOLONG;
-    lfs_file_open(&lfs, &file, path, LFS_O_WRONLY | LFS_O_CREAT)
-            => LFS_ERR_NAMETOOLONG;
+    memset(path, 'w', LFS2_NAME_MAX+1);
+    path[LFS2_NAME_MAX+1] = '\0';
+    lfs2_mkdir(&lfs2, path) => LFS2_ERR_NAMETOOLONG;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_WRONLY | LFS2_O_CREAT)
+            => LFS2_ERR_NAMETOOLONG;
 
     memcpy(path, "coffee/", strlen("coffee/"));
-    memset(path+strlen("coffee/"), 'w', LFS_NAME_MAX+1);
-    path[strlen("coffee/")+LFS_NAME_MAX+1] = '\0';
-    lfs_mkdir(&lfs, path) => LFS_ERR_NAMETOOLONG;
-    lfs_file_open(&lfs, &file, path, LFS_O_WRONLY | LFS_O_CREAT)
-            => LFS_ERR_NAMETOOLONG;
-    lfs_unmount(&lfs) => 0;
+    memset(path+strlen("coffee/"), 'w', LFS2_NAME_MAX+1);
+    path[strlen("coffee/")+LFS2_NAME_MAX+1] = '\0';
+    lfs2_mkdir(&lfs2, path) => LFS2_ERR_NAMETOOLONG;
+    lfs2_file_open(&lfs2, &file, path, LFS2_O_WRONLY | LFS2_O_CREAT)
+            => LFS2_ERR_NAMETOOLONG;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # really big path test
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "coffee") => 0;
-    lfs_mkdir(&lfs, "coffee/hotcoffee") => 0;
-    lfs_mkdir(&lfs, "coffee/warmcoffee") => 0;
-    lfs_mkdir(&lfs, "coffee/coldcoffee") => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_mkdir(&lfs2, "coffee") => 0;
+    lfs2_mkdir(&lfs2, "coffee/hotcoffee") => 0;
+    lfs2_mkdir(&lfs2, "coffee/warmcoffee") => 0;
+    lfs2_mkdir(&lfs2, "coffee/coldcoffee") => 0;
 
-    memset(path, 'w', LFS_NAME_MAX);
-    path[LFS_NAME_MAX] = '\0';
-    lfs_mkdir(&lfs, path) => 0;
-    lfs_remove(&lfs, path) => 0;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT) => 0;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_remove(&lfs, path) => 0;
+    memset(path, 'w', LFS2_NAME_MAX);
+    path[LFS2_NAME_MAX] = '\0';
+    lfs2_mkdir(&lfs2, path) => 0;
+    lfs2_remove(&lfs2, path) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_remove(&lfs2, path) => 0;
 
     memcpy(path, "coffee/", strlen("coffee/"));
-    memset(path+strlen("coffee/"), 'w', LFS_NAME_MAX);
-    path[strlen("coffee/")+LFS_NAME_MAX] = '\0';
-    lfs_mkdir(&lfs, path) => 0;
-    lfs_remove(&lfs, path) => 0;
-    lfs_file_open(&lfs, &file, path,
-            LFS_O_WRONLY | LFS_O_CREAT) => 0;
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_remove(&lfs, path) => 0;
-    lfs_unmount(&lfs) => 0;
+    memset(path+strlen("coffee/"), 'w', LFS2_NAME_MAX);
+    path[strlen("coffee/")+LFS2_NAME_MAX] = '\0';
+    lfs2_mkdir(&lfs2, path) => 0;
+    lfs2_remove(&lfs2, path) => 0;
+    lfs2_file_open(&lfs2, &file, path,
+            LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_remove(&lfs2, path) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 

tests/test_relocations.toml

@@ -2,39 +2,39 @@
 [[case]] # dangling split dir test
 define.ITERATIONS = 20
 define.COUNT = 10
-define.LFS_BLOCK_CYCLES = [8, 1]
+define.LFS2_BLOCK_CYCLES = [8, 1]
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
     // fill up filesystem so only ~16 blocks are left
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "padding", LFS_O_CREAT | LFS_O_WRONLY) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "padding", LFS2_O_CREAT | LFS2_O_WRONLY) => 0;
     memset(buffer, 0, 512);
-    while (LFS_BLOCK_COUNT - lfs_fs_size(&lfs) > 16) {
-        lfs_file_write(&lfs, &file, buffer, 512) => 512;
+    while (LFS2_BLOCK_COUNT - lfs2_fs_size(&lfs2) > 16) {
+        lfs2_file_write(&lfs2, &file, buffer, 512) => 512;
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // make a child dir to use in bounded space
-    lfs_mkdir(&lfs, "child") => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_mkdir(&lfs2, "child") => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (int j = 0; j < ITERATIONS; j++) {
         for (int i = 0; i < COUNT; i++) {
             sprintf(path, "child/test%03d_loooooooooooooooooong_name", i);
-            lfs_file_open(&lfs, &file, path, LFS_O_CREAT | LFS_O_WRONLY) => 0;
-            lfs_file_close(&lfs, &file) => 0;
+            lfs2_file_open(&lfs2, &file, path, LFS2_O_CREAT | LFS2_O_WRONLY) => 0;
+            lfs2_file_close(&lfs2, &file) => 0;
         }
 
-        lfs_dir_open(&lfs, &dir, "child") => 0;
-        lfs_dir_read(&lfs, &dir, &info) => 1;
-        lfs_dir_read(&lfs, &dir, &info) => 1;
+        lfs2_dir_open(&lfs2, &dir, "child") => 0;
+        lfs2_dir_read(&lfs2, &dir, &info) => 1;
+        lfs2_dir_read(&lfs2, &dir, &info) => 1;
         for (int i = 0; i < COUNT; i++) {
             sprintf(path, "test%03d_loooooooooooooooooong_name", i);
-            lfs_dir_read(&lfs, &dir, &info) => 1;
-            assert(strcmp(info.name, path) == 0);
+            lfs2_dir_read(&lfs2, &dir, &info) => 1;
+            strcmp(info.name, path) => 0;
         }
-        lfs_dir_read(&lfs, &dir, &info) => 0;
-        lfs_dir_close(&lfs, &dir) => 0;
+        lfs2_dir_read(&lfs2, &dir, &info) => 0;
+        lfs2_dir_close(&lfs2, &dir) => 0;
 
         if (j == ITERATIONS-1) {
             break;
@@ -42,183 +42,105 @@ code = '''
 
         for (int i = 0; i < COUNT; i++) {
             sprintf(path, "child/test%03d_loooooooooooooooooong_name", i);
-            lfs_remove(&lfs, path) => 0;
+            lfs2_remove(&lfs2, path) => 0;
         }
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_dir_open(&lfs, &dir, "child") => 0;
-    lfs_dir_read(&lfs, &dir, &info) => 1;
-    lfs_dir_read(&lfs, &dir, &info) => 1;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_dir_open(&lfs2, &dir, "child") => 0;
+    lfs2_dir_read(&lfs2, &dir, &info) => 1;
+    lfs2_dir_read(&lfs2, &dir, &info) => 1;
     for (int i = 0; i < COUNT; i++) {
         sprintf(path, "test%03d_loooooooooooooooooong_name", i);
-        lfs_dir_read(&lfs, &dir, &info) => 1;
-        assert(strcmp(info.name, path) == 0);
+        lfs2_dir_read(&lfs2, &dir, &info) => 1;
+        strcmp(info.name, path) => 0;
     }
-    lfs_dir_read(&lfs, &dir, &info) => 0;
-    lfs_dir_close(&lfs, &dir) => 0;
+    lfs2_dir_read(&lfs2, &dir, &info) => 0;
+    lfs2_dir_close(&lfs2, &dir) => 0;
     for (int i = 0; i < COUNT; i++) {
         sprintf(path, "child/test%03d_loooooooooooooooooong_name", i);
-        lfs_remove(&lfs, path) => 0;
+        lfs2_remove(&lfs2, path) => 0;
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # outdated head test
 define.ITERATIONS = 20
 define.COUNT = 10
-define.LFS_BLOCK_CYCLES = [8, 1]
+define.LFS2_BLOCK_CYCLES = [8, 1]
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
     // fill up filesystem so only ~16 blocks are left
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "padding", LFS_O_CREAT | LFS_O_WRONLY) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "padding", LFS2_O_CREAT | LFS2_O_WRONLY) => 0;
     memset(buffer, 0, 512);
-    while (LFS_BLOCK_COUNT - lfs_fs_size(&lfs) > 16) {
-        lfs_file_write(&lfs, &file, buffer, 512) => 512;
+    while (LFS2_BLOCK_COUNT - lfs2_fs_size(&lfs2) > 16) {
+        lfs2_file_write(&lfs2, &file, buffer, 512) => 512;
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
     // make a child dir to use in bounded space
-    lfs_mkdir(&lfs, "child") => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_mkdir(&lfs2, "child") => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (int j = 0; j < ITERATIONS; j++) {
         for (int i = 0; i < COUNT; i++) {
             sprintf(path, "child/test%03d_loooooooooooooooooong_name", i);
-            lfs_file_open(&lfs, &file, path, LFS_O_CREAT | LFS_O_WRONLY) => 0;
-            lfs_file_close(&lfs, &file) => 0;
+            lfs2_file_open(&lfs2, &file, path, LFS2_O_CREAT | LFS2_O_WRONLY) => 0;
+            lfs2_file_close(&lfs2, &file) => 0;
         }
 
-        lfs_dir_open(&lfs, &dir, "child") => 0;
-        lfs_dir_read(&lfs, &dir, &info) => 1;
-        lfs_dir_read(&lfs, &dir, &info) => 1;
+        lfs2_dir_open(&lfs2, &dir, "child") => 0;
+        lfs2_dir_read(&lfs2, &dir, &info) => 1;
+        lfs2_dir_read(&lfs2, &dir, &info) => 1;
         for (int i = 0; i < COUNT; i++) {
             sprintf(path, "test%03d_loooooooooooooooooong_name", i);
-            lfs_dir_read(&lfs, &dir, &info) => 1;
-            assert(strcmp(info.name,  path) == 0);
+            lfs2_dir_read(&lfs2, &dir, &info) => 1;
+            strcmp(info.name, path) => 0;
             info.size => 0;
 
             sprintf(path, "child/test%03d_loooooooooooooooooong_name", i);
-            lfs_file_open(&lfs, &file, path, LFS_O_WRONLY) => 0;
-            lfs_file_write(&lfs, &file, "hi", 2) => 2;
-            lfs_file_close(&lfs, &file) => 0;
+            lfs2_file_open(&lfs2, &file, path, LFS2_O_WRONLY) => 0;
+            lfs2_file_write(&lfs2, &file, "hi", 2) => 2;
+            lfs2_file_close(&lfs2, &file) => 0;
         }
-        lfs_dir_read(&lfs, &dir, &info) => 0;
+        lfs2_dir_read(&lfs2, &dir, &info) => 0;
 
-        lfs_dir_rewind(&lfs, &dir) => 0;
-        lfs_dir_read(&lfs, &dir, &info) => 1;
-        lfs_dir_read(&lfs, &dir, &info) => 1;
+        lfs2_dir_rewind(&lfs2, &dir) => 0;
+        lfs2_dir_read(&lfs2, &dir, &info) => 1;
+        lfs2_dir_read(&lfs2, &dir, &info) => 1;
         for (int i = 0; i < COUNT; i++) {
             sprintf(path, "test%03d_loooooooooooooooooong_name", i);
-            lfs_dir_read(&lfs, &dir, &info) => 1;
-            assert(strcmp(info.name,  path) == 0);
+            lfs2_dir_read(&lfs2, &dir, &info) => 1;
+            strcmp(info.name, path) => 0;
             info.size => 2;
 
             sprintf(path, "child/test%03d_loooooooooooooooooong_name", i);
-            lfs_file_open(&lfs, &file, path, LFS_O_WRONLY) => 0;
-            lfs_file_write(&lfs, &file, "hi", 2) => 2;
-            lfs_file_close(&lfs, &file) => 0;
+            lfs2_file_open(&lfs2, &file, path, LFS2_O_WRONLY) => 0;
+            lfs2_file_write(&lfs2, &file, "hi", 2) => 2;
+            lfs2_file_close(&lfs2, &file) => 0;
         }
-        lfs_dir_read(&lfs, &dir, &info) => 0;
+        lfs2_dir_read(&lfs2, &dir, &info) => 0;
 
-        lfs_dir_rewind(&lfs, &dir) => 0;
-        lfs_dir_read(&lfs, &dir, &info) => 1;
-        lfs_dir_read(&lfs, &dir, &info) => 1;
+        lfs2_dir_rewind(&lfs2, &dir) => 0;
+        lfs2_dir_read(&lfs2, &dir, &info) => 1;
+        lfs2_dir_read(&lfs2, &dir, &info) => 1;
         for (int i = 0; i < COUNT; i++) {
             sprintf(path, "test%03d_loooooooooooooooooong_name", i);
-            lfs_dir_read(&lfs, &dir, &info) => 1;
-            assert(strcmp(info.name,  path) == 0);
+            lfs2_dir_read(&lfs2, &dir, &info) => 1;
+            strcmp(info.name, path) => 0;
             info.size => 2;
         }
-        lfs_dir_read(&lfs, &dir, &info) => 0;
-        lfs_dir_close(&lfs, &dir) => 0;
+        lfs2_dir_read(&lfs2, &dir, &info) => 0;
+        lfs2_dir_close(&lfs2, &dir) => 0;
 
         for (int i = 0; i < COUNT; i++) {
             sprintf(path, "child/test%03d_loooooooooooooooooong_name", i);
-            lfs_remove(&lfs, path) => 0;
+            lfs2_remove(&lfs2, path) => 0;
         }
     }
-    lfs_unmount(&lfs) => 0;
-'''
-
-[[case]] # non-DAG tree test
-define.LFS_BLOCK_CYCLES = [8, 1]
-define.N = [10, 100, 1000]
-code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    // first create directories
-    lfs_mkdir(&lfs, "child_1") => 0;
-    lfs_mkdir(&lfs, "child_2") => 0;
-    // then move the second child under the first,
-    // this creates a cycle since the second child should have been
-    // inserted before the first
-    lfs_rename(&lfs, "child_2", "child_1/child_2") => 0;
-    // now try to force second child to relocate
-    lfs_file_open(&lfs, &file, "child_1/child_2/grandchild",
-            LFS_O_WRONLY | LFS_O_CREAT) => 0;
-    size = 0;
-    for (int i = 0; i < N; i++) {
-        lfs_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
-        sprintf((char*)buffer, "%d", i);
-        size = strlen((char*)buffer);
-        lfs_file_write(&lfs, &file, buffer, size) => size;
-        lfs_file_sync(&lfs, &file) => 0;
-    }
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs);
-
-    // check that nothing broke
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_dir_open(&lfs, &dir, "/") => 0;
-    lfs_dir_read(&lfs, &dir, &info) => 1;
-    assert(info.type == LFS_TYPE_DIR);
-    assert(strcmp(info.name, ".") == 0);
-    lfs_dir_read(&lfs, &dir, &info) => 1;
-    assert(info.type == LFS_TYPE_DIR);
-    assert(strcmp(info.name, "..") == 0);
-    lfs_dir_read(&lfs, &dir, &info) => 1;
-    assert(info.type == LFS_TYPE_DIR);
-    assert(strcmp(info.name, "child_1") == 0);
-    lfs_dir_read(&lfs, &dir, &info) => 0;
-    lfs_dir_close(&lfs, &dir) => 0;
-    
-    lfs_dir_open(&lfs, &dir, "/child_1") => 0;
-    lfs_dir_read(&lfs, &dir, &info) => 1;
-    assert(info.type == LFS_TYPE_DIR);
-    assert(strcmp(info.name, ".") == 0);
-    lfs_dir_read(&lfs, &dir, &info) => 1;
-    assert(info.type == LFS_TYPE_DIR);
-    assert(strcmp(info.name, "..") == 0);
-    lfs_dir_read(&lfs, &dir, &info) => 1;
-    assert(info.type == LFS_TYPE_DIR);
-    assert(strcmp(info.name, "child_2") == 0);
-    lfs_dir_read(&lfs, &dir, &info) => 0;
-    lfs_dir_close(&lfs, &dir) => 0;
-
-    lfs_dir_open(&lfs, &dir, "/child_1/child_2") => 0;
-    lfs_dir_read(&lfs, &dir, &info) => 1;
-    assert(info.type == LFS_TYPE_DIR);
-    assert(strcmp(info.name, ".") == 0);
-    lfs_dir_read(&lfs, &dir, &info) => 1;
-    assert(info.type == LFS_TYPE_DIR);
-    assert(strcmp(info.name, "..") == 0);
-    lfs_dir_read(&lfs, &dir, &info) => 1;
-    assert(info.type == LFS_TYPE_REG);
-    assert(strcmp(info.name, "grandchild") == 0);
-    assert(info.size == size);
-    lfs_dir_read(&lfs, &dir, &info) => 0;
-    lfs_dir_close(&lfs, &dir) => 0;
-
-    lfs_file_open(&lfs, &file, "child_1/child_2/grandchild",
-            LFS_O_RDONLY) => 0;
-    uint8_t rbuffer[1024];
-    lfs_file_read(&lfs, &file, rbuffer, sizeof(rbuffer)) => size;
-    assert(memcmp(rbuffer, buffer, size) == 0);
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # reentrant testing for relocations, this is the same as the
@@ -226,17 +148,17 @@ code = '''
          # almost every tree operation needs a relocation
 reentrant = true
 # TODO fix this case, caused by non-DAG trees
-#if = '!(DEPTH == 3 && LFS_CACHE_SIZE != 64)'
+if = '!(DEPTH == 3 && LFS2_CACHE_SIZE != 64)'
 define = [
-    {FILES=6,  DEPTH=1, CYCLES=20, LFS_BLOCK_CYCLES=1},
-    {FILES=26, DEPTH=1, CYCLES=20, LFS_BLOCK_CYCLES=1},
-    {FILES=3,  DEPTH=3, CYCLES=20, LFS_BLOCK_CYCLES=1},
+    {FILES=6,  DEPTH=1, CYCLES=20, LFS2_BLOCK_CYCLES=1},
+    {FILES=26, DEPTH=1, CYCLES=20, LFS2_BLOCK_CYCLES=1},
+    {FILES=3,  DEPTH=3, CYCLES=20, LFS2_BLOCK_CYCLES=1},
 ]
 code = '''
-    err = lfs_mount(&lfs, &cfg);
+    err = lfs2_mount(&lfs2, &cfg);
     if (err) {
-        lfs_format(&lfs, &cfg) => 0;
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_format(&lfs2, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
     }
 
     srand(1);
@@ -249,56 +171,56 @@ code = '''
         }
 
         // if it does not exist, we create it, else we destroy
-        int res = lfs_stat(&lfs, full_path, &info);
-        if (res == LFS_ERR_NOENT) {
+        int res = lfs2_stat(&lfs2, full_path, &info);
+        if (res == LFS2_ERR_NOENT) {
             // create each directory in turn, ignore if dir already exists
             for (int d = 0; d < DEPTH; d++) {
                 strcpy(path, full_path);
                 path[2*d+2] = '\0';
-                err = lfs_mkdir(&lfs, path);
-                assert(!err || err == LFS_ERR_EXIST);
+                err = lfs2_mkdir(&lfs2, path);
+                assert(!err || err == LFS2_ERR_EXIST);
             }
 
             for (int d = 0; d < DEPTH; d++) {
                 strcpy(path, full_path);
                 path[2*d+2] = '\0';
-                lfs_stat(&lfs, path, &info) => 0;
+                lfs2_stat(&lfs2, path, &info) => 0;
                 assert(strcmp(info.name, &path[2*d+1]) == 0);
-                assert(info.type == LFS_TYPE_DIR);
+                assert(info.type == LFS2_TYPE_DIR);
             }
         } else {
             // is valid dir?
             assert(strcmp(info.name, &full_path[2*(DEPTH-1)+1]) == 0);
-            assert(info.type == LFS_TYPE_DIR);
+            assert(info.type == LFS2_TYPE_DIR);
 
             // try to delete path in reverse order, ignore if dir is not empty
             for (int d = DEPTH-1; d >= 0; d--) {
                 strcpy(path, full_path);
                 path[2*d+2] = '\0';
-                err = lfs_remove(&lfs, path);
-                assert(!err || err == LFS_ERR_NOTEMPTY);
+                err = lfs2_remove(&lfs2, path);
+                assert(!err || err == LFS2_ERR_NOTEMPTY);
             }
 
-            lfs_stat(&lfs, full_path, &info) => LFS_ERR_NOENT;
+            lfs2_stat(&lfs2, full_path, &info) => LFS2_ERR_NOENT;
         }
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # reentrant testing for relocations, but now with random renames!
 reentrant = true
 # TODO fix this case, caused by non-DAG trees
-#if = '!(DEPTH == 3 && LFS_CACHE_SIZE != 64)'
+if = '!(DEPTH == 3 && LFS2_CACHE_SIZE != 64)'
 define = [
-    {FILES=6,  DEPTH=1, CYCLES=20, LFS_BLOCK_CYCLES=1},
-    {FILES=26, DEPTH=1, CYCLES=20, LFS_BLOCK_CYCLES=1},
-    {FILES=3,  DEPTH=3, CYCLES=20, LFS_BLOCK_CYCLES=1},
+    {FILES=6,  DEPTH=1, CYCLES=20, LFS2_BLOCK_CYCLES=1},
+    {FILES=26, DEPTH=1, CYCLES=20, LFS2_BLOCK_CYCLES=1},
+    {FILES=3,  DEPTH=3, CYCLES=20, LFS2_BLOCK_CYCLES=1},
 ]
 code = '''
-    err = lfs_mount(&lfs, &cfg);
+    err = lfs2_mount(&lfs2, &cfg);
     if (err) {
-        lfs_format(&lfs, &cfg) => 0;
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_format(&lfs2, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
     }
 
     srand(1);
@@ -311,27 +233,27 @@ code = '''
         }
 
         // if it does not exist, we create it, else we destroy
-        int res = lfs_stat(&lfs, full_path, &info);
-        assert(!res || res == LFS_ERR_NOENT);
-        if (res == LFS_ERR_NOENT) {
+        int res = lfs2_stat(&lfs2, full_path, &info);
+        assert(!res || res == LFS2_ERR_NOENT);
+        if (res == LFS2_ERR_NOENT) {
             // create each directory in turn, ignore if dir already exists
             for (int d = 0; d < DEPTH; d++) {
                 strcpy(path, full_path);
                 path[2*d+2] = '\0';
-                err = lfs_mkdir(&lfs, path);
-                assert(!err || err == LFS_ERR_EXIST);
+                err = lfs2_mkdir(&lfs2, path);
+                assert(!err || err == LFS2_ERR_EXIST);
             }
 
             for (int d = 0; d < DEPTH; d++) {
                 strcpy(path, full_path);
                 path[2*d+2] = '\0';
-                lfs_stat(&lfs, path, &info) => 0;
+                lfs2_stat(&lfs2, path, &info) => 0;
                 assert(strcmp(info.name, &path[2*d+1]) == 0);
-                assert(info.type == LFS_TYPE_DIR);
+                assert(info.type == LFS2_TYPE_DIR);
             }
         } else {
             assert(strcmp(info.name, &full_path[2*(DEPTH-1)+1]) == 0);
-            assert(info.type == LFS_TYPE_DIR);
+            assert(info.type == LFS2_TYPE_DIR);
 
             // create new random path
             char new_path[256];
@@ -340,17 +262,17 @@ code = '''
             }
 
             // if new path does not exist, rename, otherwise destroy
-            res = lfs_stat(&lfs, new_path, &info);
-            assert(!res || res == LFS_ERR_NOENT);
-            if (res == LFS_ERR_NOENT) {
+            res = lfs2_stat(&lfs2, new_path, &info);
+            assert(!res || res == LFS2_ERR_NOENT);
+            if (res == LFS2_ERR_NOENT) {
                 // stop once some dir is renamed
                 for (int d = 0; d < DEPTH; d++) {
                     strcpy(&path[2*d], &full_path[2*d]);
                     path[2*d+2] = '\0';
                     strcpy(&path[128+2*d], &new_path[2*d]);
                     path[128+2*d+2] = '\0';
-                    err = lfs_rename(&lfs, path, path+128);
-                    assert(!err || err == LFS_ERR_NOTEMPTY);
+                    err = lfs2_rename(&lfs2, path, path+128);
+                    assert(!err || err == LFS2_ERR_NOTEMPTY);
                     if (!err) {
                         strcpy(path, path+128);
                     }
@@ -359,25 +281,25 @@ code = '''
                 for (int d = 0; d < DEPTH; d++) {
                     strcpy(path, new_path);
                     path[2*d+2] = '\0';
-                    lfs_stat(&lfs, path, &info) => 0;
+                    lfs2_stat(&lfs2, path, &info) => 0;
                     assert(strcmp(info.name, &path[2*d+1]) == 0);
-                    assert(info.type == LFS_TYPE_DIR);
+                    assert(info.type == LFS2_TYPE_DIR);
                 }
                 
-                lfs_stat(&lfs, full_path, &info) => LFS_ERR_NOENT;
+                lfs2_stat(&lfs2, full_path, &info) => LFS2_ERR_NOENT;
             } else {
                 // try to delete path in reverse order,
                 // ignore if dir is not empty
                 for (int d = DEPTH-1; d >= 0; d--) {
                     strcpy(path, full_path);
                     path[2*d+2] = '\0';
-                    err = lfs_remove(&lfs, path);
-                    assert(!err || err == LFS_ERR_NOTEMPTY);
+                    err = lfs2_remove(&lfs2, path);
+                    assert(!err || err == LFS2_ERR_NOTEMPTY);
                 }
 
-                lfs_stat(&lfs, full_path, &info) => LFS_ERR_NOENT;
+                lfs2_stat(&lfs2, full_path, &info) => LFS2_ERR_NOENT;
             }
         }
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''

tests/test_seek.toml

@@ -9,63 +9,63 @@ define = [
     {COUNT=4,   SKIP=2},
 ]
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "kitty",
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "kitty",
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_APPEND) => 0;
     size = strlen("kittycatcat");
     memcpy(buffer, "kittycatcat", size);
     for (int j = 0; j < COUNT; j++) {
-        lfs_file_write(&lfs, &file, buffer, size);
+        lfs2_file_write(&lfs2, &file, buffer, size);
     }
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "kitty", LFS_O_RDONLY) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "kitty", LFS2_O_RDONLY) => 0;
 
-    lfs_soff_t pos = -1;
+    lfs2_soff_t pos = -1;
     size = strlen("kittycatcat");
     for (int i = 0; i < SKIP; i++) {
-        lfs_file_read(&lfs, &file, buffer, size) => size;
+        lfs2_file_read(&lfs2, &file, buffer, size) => size;
         memcmp(buffer, "kittycatcat", size) => 0;
-        pos = lfs_file_tell(&lfs, &file);
+        pos = lfs2_file_tell(&lfs2, &file);
     }
     assert(pos >= 0);
 
-    lfs_file_seek(&lfs, &file, pos, LFS_SEEK_SET) => pos;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_file_seek(&lfs2, &file, pos, LFS2_SEEK_SET) => pos;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     memcmp(buffer, "kittycatcat", size) => 0;
 
-    lfs_file_rewind(&lfs, &file) => 0;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_file_rewind(&lfs2, &file) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     memcmp(buffer, "kittycatcat", size) => 0;
 
-    lfs_file_seek(&lfs, &file, 0, LFS_SEEK_CUR) => size;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_file_seek(&lfs2, &file, 0, LFS2_SEEK_CUR) => size;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     memcmp(buffer, "kittycatcat", size) => 0;
 
-    lfs_file_seek(&lfs, &file, size, LFS_SEEK_CUR) => 3*size;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_file_seek(&lfs2, &file, size, LFS2_SEEK_CUR) => 3*size;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     memcmp(buffer, "kittycatcat", size) => 0;
 
-    lfs_file_seek(&lfs, &file, pos, LFS_SEEK_SET) => pos;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_file_seek(&lfs2, &file, pos, LFS2_SEEK_SET) => pos;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     memcmp(buffer, "kittycatcat", size) => 0;
 
-    lfs_file_seek(&lfs, &file, -size, LFS_SEEK_CUR) => pos;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_file_seek(&lfs2, &file, -size, LFS2_SEEK_CUR) => pos;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     memcmp(buffer, "kittycatcat", size) => 0;
 
-    lfs_file_seek(&lfs, &file, -size, LFS_SEEK_END) >= 0 => 1;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_file_seek(&lfs2, &file, -size, LFS2_SEEK_END) >= 0 => 1;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     memcmp(buffer, "kittycatcat", size) => 0;
 
-    size = lfs_file_size(&lfs, &file);
-    lfs_file_seek(&lfs, &file, 0, LFS_SEEK_CUR) => size;
+    size = lfs2_file_size(&lfs2, &file);
+    lfs2_file_seek(&lfs2, &file, 0, LFS2_SEEK_CUR) => size;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # simple file seek and write
@@ -78,109 +78,109 @@ define = [
     {COUNT=4,   SKIP=2},
 ]
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "kitty",
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "kitty",
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_APPEND) => 0;
     size = strlen("kittycatcat");
     memcpy(buffer, "kittycatcat", size);
     for (int j = 0; j < COUNT; j++) {
-        lfs_file_write(&lfs, &file, buffer, size);
+        lfs2_file_write(&lfs2, &file, buffer, size);
     }
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "kitty", LFS_O_RDWR) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "kitty", LFS2_O_RDWR) => 0;
 
-    lfs_soff_t pos = -1;
+    lfs2_soff_t pos = -1;
     size = strlen("kittycatcat");
     for (int i = 0; i < SKIP; i++) {
-        lfs_file_read(&lfs, &file, buffer, size) => size;
+        lfs2_file_read(&lfs2, &file, buffer, size) => size;
         memcmp(buffer, "kittycatcat", size) => 0;
-        pos = lfs_file_tell(&lfs, &file);
+        pos = lfs2_file_tell(&lfs2, &file);
     }
     assert(pos >= 0);
 
     memcpy(buffer, "doggodogdog", size);
-    lfs_file_seek(&lfs, &file, pos, LFS_SEEK_SET) => pos;
-    lfs_file_write(&lfs, &file, buffer, size) => size;
+    lfs2_file_seek(&lfs2, &file, pos, LFS2_SEEK_SET) => pos;
+    lfs2_file_write(&lfs2, &file, buffer, size) => size;
 
-    lfs_file_seek(&lfs, &file, pos, LFS_SEEK_SET) => pos;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_file_seek(&lfs2, &file, pos, LFS2_SEEK_SET) => pos;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     memcmp(buffer, "doggodogdog", size) => 0;
 
-    lfs_file_rewind(&lfs, &file) => 0;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_file_rewind(&lfs2, &file) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     memcmp(buffer, "kittycatcat", size) => 0;
 
-    lfs_file_seek(&lfs, &file, pos, LFS_SEEK_SET) => pos;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_file_seek(&lfs2, &file, pos, LFS2_SEEK_SET) => pos;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     memcmp(buffer, "doggodogdog", size) => 0;
 
-    lfs_file_seek(&lfs, &file, -size, LFS_SEEK_END) >= 0 => 1;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_file_seek(&lfs2, &file, -size, LFS2_SEEK_END) >= 0 => 1;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     memcmp(buffer, "kittycatcat", size) => 0;
 
-    size = lfs_file_size(&lfs, &file);
-    lfs_file_seek(&lfs, &file, 0, LFS_SEEK_CUR) => size;
+    size = lfs2_file_size(&lfs2, &file);
+    lfs2_file_seek(&lfs2, &file, 0, LFS2_SEEK_CUR) => size;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # boundary seek and writes
 define.COUNT = 132
 define.OFFSETS = '"{512, 1020, 513, 1021, 511, 1019, 1441}"'
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "kitty",
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "kitty",
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_APPEND) => 0;
     size = strlen("kittycatcat");
     memcpy(buffer, "kittycatcat", size);
     for (int j = 0; j < COUNT; j++) {
-        lfs_file_write(&lfs, &file, buffer, size);
+        lfs2_file_write(&lfs2, &file, buffer, size);
     }
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "kitty", LFS_O_RDWR) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "kitty", LFS2_O_RDWR) => 0;
 
     size = strlen("hedgehoghog");
-    const lfs_soff_t offsets[] = OFFSETS;
+    const lfs2_soff_t offsets[] = OFFSETS;
 
     for (unsigned i = 0; i < sizeof(offsets) / sizeof(offsets[0]); i++) {
-        lfs_soff_t off = offsets[i];
+        lfs2_soff_t off = offsets[i];
         memcpy(buffer, "hedgehoghog", size);
-        lfs_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
-        lfs_file_write(&lfs, &file, buffer, size) => size;
-        lfs_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
-        lfs_file_read(&lfs, &file, buffer, size) => size;
+        lfs2_file_seek(&lfs2, &file, off, LFS2_SEEK_SET) => off;
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
+        lfs2_file_seek(&lfs2, &file, off, LFS2_SEEK_SET) => off;
+        lfs2_file_read(&lfs2, &file, buffer, size) => size;
         memcmp(buffer, "hedgehoghog", size) => 0;
 
-        lfs_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
-        lfs_file_read(&lfs, &file, buffer, size) => size;
+        lfs2_file_seek(&lfs2, &file, 0, LFS2_SEEK_SET) => 0;
+        lfs2_file_read(&lfs2, &file, buffer, size) => size;
         memcmp(buffer, "kittycatcat", size) => 0;
 
-        lfs_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
-        lfs_file_read(&lfs, &file, buffer, size) => size;
+        lfs2_file_seek(&lfs2, &file, off, LFS2_SEEK_SET) => off;
+        lfs2_file_read(&lfs2, &file, buffer, size) => size;
         memcmp(buffer, "hedgehoghog", size) => 0;
 
-        lfs_file_sync(&lfs, &file) => 0;
+        lfs2_file_sync(&lfs2, &file) => 0;
 
-        lfs_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
-        lfs_file_read(&lfs, &file, buffer, size) => size;
+        lfs2_file_seek(&lfs2, &file, 0, LFS2_SEEK_SET) => 0;
+        lfs2_file_read(&lfs2, &file, buffer, size) => size;
         memcmp(buffer, "kittycatcat", size) => 0;
 
-        lfs_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
-        lfs_file_read(&lfs, &file, buffer, size) => size;
+        lfs2_file_seek(&lfs2, &file, off, LFS2_SEEK_SET) => off;
+        lfs2_file_read(&lfs2, &file, buffer, size) => size;
         memcmp(buffer, "hedgehoghog", size) => 0;
     }
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # out of bounds seek
@@ -193,116 +193,116 @@ define = [
     {COUNT=4,   SKIP=3},
 ]
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "kitty",
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "kitty",
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_APPEND) => 0;
     size = strlen("kittycatcat");
     memcpy(buffer, "kittycatcat", size);
     for (int j = 0; j < COUNT; j++) {
-        lfs_file_write(&lfs, &file, buffer, size);
+        lfs2_file_write(&lfs2, &file, buffer, size);
     }
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "kitty", LFS_O_RDWR) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "kitty", LFS2_O_RDWR) => 0;
 
     size = strlen("kittycatcat");
-    lfs_file_size(&lfs, &file) => COUNT*size;
-    lfs_file_seek(&lfs, &file, (COUNT+SKIP)*size,
-            LFS_SEEK_SET) => (COUNT+SKIP)*size;
-    lfs_file_read(&lfs, &file, buffer, size) => 0;
+    lfs2_file_size(&lfs2, &file) => COUNT*size;
+    lfs2_file_seek(&lfs2, &file, (COUNT+SKIP)*size,
+            LFS2_SEEK_SET) => (COUNT+SKIP)*size;
+    lfs2_file_read(&lfs2, &file, buffer, size) => 0;
 
     memcpy(buffer, "porcupineee", size);
-    lfs_file_write(&lfs, &file, buffer, size) => size;
+    lfs2_file_write(&lfs2, &file, buffer, size) => size;
 
-    lfs_file_seek(&lfs, &file, (COUNT+SKIP)*size,
-            LFS_SEEK_SET) => (COUNT+SKIP)*size;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_file_seek(&lfs2, &file, (COUNT+SKIP)*size,
+            LFS2_SEEK_SET) => (COUNT+SKIP)*size;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     memcmp(buffer, "porcupineee", size) => 0;
 
-    lfs_file_seek(&lfs, &file, COUNT*size,
-            LFS_SEEK_SET) => COUNT*size;
-    lfs_file_read(&lfs, &file, buffer, size) => size;
+    lfs2_file_seek(&lfs2, &file, COUNT*size,
+            LFS2_SEEK_SET) => COUNT*size;
+    lfs2_file_read(&lfs2, &file, buffer, size) => size;
     memcmp(buffer, "\0\0\0\0\0\0\0\0\0\0\0", size) => 0;
 
-    lfs_file_seek(&lfs, &file, -((COUNT+SKIP)*size),
-            LFS_SEEK_CUR) => LFS_ERR_INVAL;
-    lfs_file_tell(&lfs, &file) => (COUNT+1)*size;
+    lfs2_file_seek(&lfs2, &file, -((COUNT+SKIP)*size),
+            LFS2_SEEK_CUR) => LFS2_ERR_INVAL;
+    lfs2_file_tell(&lfs2, &file) => (COUNT+1)*size;
 
-    lfs_file_seek(&lfs, &file, -((COUNT+2*SKIP)*size),
-            LFS_SEEK_END) => LFS_ERR_INVAL;
-    lfs_file_tell(&lfs, &file) => (COUNT+1)*size;
+    lfs2_file_seek(&lfs2, &file, -((COUNT+2*SKIP)*size),
+            LFS2_SEEK_END) => LFS2_ERR_INVAL;
+    lfs2_file_tell(&lfs2, &file) => (COUNT+1)*size;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # inline write and seek
 define.SIZE = [2, 4, 128, 132]
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "tinykitty",
-            LFS_O_RDWR | LFS_O_CREAT) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "tinykitty",
+            LFS2_O_RDWR | LFS2_O_CREAT) => 0;
     int j = 0;
     int k = 0;
 
     memcpy(buffer, "abcdefghijklmnopqrstuvwxyz", 26);
     for (unsigned i = 0; i < SIZE; i++) {
-        lfs_file_write(&lfs, &file, &buffer[j++ % 26], 1) => 1;
-        lfs_file_tell(&lfs, &file) => i+1;
-        lfs_file_size(&lfs, &file) => i+1;
+        lfs2_file_write(&lfs2, &file, &buffer[j++ % 26], 1) => 1;
+        lfs2_file_tell(&lfs2, &file) => i+1;
+        lfs2_file_size(&lfs2, &file) => i+1;
     }
 
-    lfs_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
-    lfs_file_tell(&lfs, &file) => 0;
-    lfs_file_size(&lfs, &file) => SIZE;
+    lfs2_file_seek(&lfs2, &file, 0, LFS2_SEEK_SET) => 0;
+    lfs2_file_tell(&lfs2, &file) => 0;
+    lfs2_file_size(&lfs2, &file) => SIZE;
     for (unsigned i = 0; i < SIZE; i++) {
         uint8_t c;
-        lfs_file_read(&lfs, &file, &c, 1) => 1;
+        lfs2_file_read(&lfs2, &file, &c, 1) => 1;
         c => buffer[k++ % 26];
     }
 
-    lfs_file_sync(&lfs, &file) => 0;
-    lfs_file_tell(&lfs, &file) => SIZE;
-    lfs_file_size(&lfs, &file) => SIZE;
+    lfs2_file_sync(&lfs2, &file) => 0;
+    lfs2_file_tell(&lfs2, &file) => SIZE;
+    lfs2_file_size(&lfs2, &file) => SIZE;
 
-    lfs_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
+    lfs2_file_seek(&lfs2, &file, 0, LFS2_SEEK_SET) => 0;
     for (unsigned i = 0; i < SIZE; i++) {
-        lfs_file_write(&lfs, &file, &buffer[j++ % 26], 1) => 1;
-        lfs_file_tell(&lfs, &file) => i+1;
-        lfs_file_size(&lfs, &file) => SIZE;
-        lfs_file_sync(&lfs, &file) => 0;
-        lfs_file_tell(&lfs, &file) => i+1;
-        lfs_file_size(&lfs, &file) => SIZE;
+        lfs2_file_write(&lfs2, &file, &buffer[j++ % 26], 1) => 1;
+        lfs2_file_tell(&lfs2, &file) => i+1;
+        lfs2_file_size(&lfs2, &file) => SIZE;
+        lfs2_file_sync(&lfs2, &file) => 0;
+        lfs2_file_tell(&lfs2, &file) => i+1;
+        lfs2_file_size(&lfs2, &file) => SIZE;
         if (i < SIZE-2) {
             uint8_t c[3];
-            lfs_file_seek(&lfs, &file, -1, LFS_SEEK_CUR) => i;
-            lfs_file_read(&lfs, &file, &c, 3) => 3;
-            lfs_file_tell(&lfs, &file) => i+3;
-            lfs_file_size(&lfs, &file) => SIZE;
-            lfs_file_seek(&lfs, &file, i+1, LFS_SEEK_SET) => i+1;
-            lfs_file_tell(&lfs, &file) => i+1;
-            lfs_file_size(&lfs, &file) => SIZE;
+            lfs2_file_seek(&lfs2, &file, -1, LFS2_SEEK_CUR) => i;
+            lfs2_file_read(&lfs2, &file, &c, 3) => 3;
+            lfs2_file_tell(&lfs2, &file) => i+3;
+            lfs2_file_size(&lfs2, &file) => SIZE;
+            lfs2_file_seek(&lfs2, &file, i+1, LFS2_SEEK_SET) => i+1;
+            lfs2_file_tell(&lfs2, &file) => i+1;
+            lfs2_file_size(&lfs2, &file) => SIZE;
         }
     }
 
-    lfs_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
-    lfs_file_tell(&lfs, &file) => 0;
-    lfs_file_size(&lfs, &file) => SIZE;
+    lfs2_file_seek(&lfs2, &file, 0, LFS2_SEEK_SET) => 0;
+    lfs2_file_tell(&lfs2, &file) => 0;
+    lfs2_file_size(&lfs2, &file) => SIZE;
     for (unsigned i = 0; i < SIZE; i++) {
         uint8_t c;
-        lfs_file_read(&lfs, &file, &c, 1) => 1;
+        lfs2_file_read(&lfs2, &file, &c, 1) => 1;
         c => buffer[k++ % 26];
     }
 
-    lfs_file_sync(&lfs, &file) => 0;
-    lfs_file_tell(&lfs, &file) => SIZE;
-    lfs_file_size(&lfs, &file) => SIZE;
+    lfs2_file_sync(&lfs2, &file) => 0;
+    lfs2_file_tell(&lfs2, &file) => SIZE;
+    lfs2_file_size(&lfs2, &file) => SIZE;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # file seek and write with power-loss
@@ -310,71 +310,71 @@ code = '''
 define.COUNT = [4, 64, 128]
 reentrant = true
 code = '''
-    err = lfs_mount(&lfs, &cfg);
+    err = lfs2_mount(&lfs2, &cfg);
     if (err) {
-        lfs_format(&lfs, &cfg) => 0;
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_format(&lfs2, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
     }
-    err = lfs_file_open(&lfs, &file, "kitty", LFS_O_RDONLY);
-    assert(!err || err == LFS_ERR_NOENT);
+    err = lfs2_file_open(&lfs2, &file, "kitty", LFS2_O_RDONLY);
+    assert(!err || err == LFS2_ERR_NOENT);
     if (!err) {
-        if (lfs_file_size(&lfs, &file) != 0) {
-            lfs_file_size(&lfs, &file) => 11*COUNT;
+        if (lfs2_file_size(&lfs2, &file) != 0) {
+            lfs2_file_size(&lfs2, &file) => 11*COUNT;
             for (int j = 0; j < COUNT; j++) {
                 memset(buffer, 0, 11+1);
-                lfs_file_read(&lfs, &file, buffer, 11) => 11;
+                lfs2_file_read(&lfs2, &file, buffer, 11) => 11;
                 assert(memcmp(buffer, "kittycatcat", 11) == 0 ||
                        memcmp(buffer, "doggodogdog", 11) == 0);
             }
         }
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
 
-    lfs_file_open(&lfs, &file, "kitty", LFS_O_WRONLY | LFS_O_CREAT) => 0;
-    if (lfs_file_size(&lfs, &file) == 0) {
+    lfs2_file_open(&lfs2, &file, "kitty", LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
+    if (lfs2_file_size(&lfs2, &file) == 0) {
         for (int j = 0; j < COUNT; j++) {
             strcpy((char*)buffer, "kittycatcat");
             size = strlen((char*)buffer);
-            lfs_file_write(&lfs, &file, buffer, size) => size;
+            lfs2_file_write(&lfs2, &file, buffer, size) => size;
         }
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
     strcpy((char*)buffer, "doggodogdog");
     size = strlen((char*)buffer);
 
-    lfs_file_open(&lfs, &file, "kitty", LFS_O_RDWR) => 0;
-    lfs_file_size(&lfs, &file) => COUNT*size;
+    lfs2_file_open(&lfs2, &file, "kitty", LFS2_O_RDWR) => 0;
+    lfs2_file_size(&lfs2, &file) => COUNT*size;
     // seek and write using quadratic probing to touch all
     // 11-byte words in the file
-    lfs_off_t off = 0;
+    lfs2_off_t off = 0;
     for (int j = 0; j < COUNT; j++) {
         off = (5*off + 1) % COUNT;
-        lfs_file_seek(&lfs, &file, off*size, LFS_SEEK_SET) => off*size;
-        lfs_file_read(&lfs, &file, buffer, size) => size;
+        lfs2_file_seek(&lfs2, &file, off*size, LFS2_SEEK_SET) => off*size;
+        lfs2_file_read(&lfs2, &file, buffer, size) => size;
         assert(memcmp(buffer, "kittycatcat", size) == 0 ||
                memcmp(buffer, "doggodogdog", size) == 0);
         if (memcmp(buffer, "doggodogdog", size) != 0) {
-            lfs_file_seek(&lfs, &file, off*size, LFS_SEEK_SET) => off*size;
+            lfs2_file_seek(&lfs2, &file, off*size, LFS2_SEEK_SET) => off*size;
             strcpy((char*)buffer, "doggodogdog");
-            lfs_file_write(&lfs, &file, buffer, size) => size;
-            lfs_file_seek(&lfs, &file, off*size, LFS_SEEK_SET) => off*size;
-            lfs_file_read(&lfs, &file, buffer, size) => size;
+            lfs2_file_write(&lfs2, &file, buffer, size) => size;
+            lfs2_file_seek(&lfs2, &file, off*size, LFS2_SEEK_SET) => off*size;
+            lfs2_file_read(&lfs2, &file, buffer, size) => size;
             assert(memcmp(buffer, "doggodogdog", size) == 0);
-            lfs_file_sync(&lfs, &file) => 0;
-            lfs_file_seek(&lfs, &file, off*size, LFS_SEEK_SET) => off*size;
-            lfs_file_read(&lfs, &file, buffer, size) => size;
+            lfs2_file_sync(&lfs2, &file) => 0;
+            lfs2_file_seek(&lfs2, &file, off*size, LFS2_SEEK_SET) => off*size;
+            lfs2_file_read(&lfs2, &file, buffer, size) => size;
             assert(memcmp(buffer, "doggodogdog", size) == 0);
         }
     }
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_file_open(&lfs, &file, "kitty", LFS_O_RDWR) => 0;
-    lfs_file_size(&lfs, &file) => COUNT*size;
+    lfs2_file_open(&lfs2, &file, "kitty", LFS2_O_RDWR) => 0;
+    lfs2_file_size(&lfs2, &file) => COUNT*size;
     for (int j = 0; j < COUNT; j++) {
-        lfs_file_read(&lfs, &file, buffer, size) => size;
+        lfs2_file_read(&lfs2, &file, buffer, size) => size;
         assert(memcmp(buffer, "doggodogdog", size) == 0);
     }
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''

tests/test_superblocks.toml

@@ -1,103 +1,127 @@
 [[case]] # simple formatting test
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
 '''
 
 [[case]] # mount/unmount
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # reentrant format
 reentrant = true
 code = '''
-    err = lfs_mount(&lfs, &cfg);
+    err = lfs2_mount(&lfs2, &cfg);
     if (err) {
-        lfs_format(&lfs, &cfg) => 0;
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_format(&lfs2, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # invalid mount
 code = '''
-    lfs_mount(&lfs, &cfg) => LFS_ERR_CORRUPT;
+    lfs2_mount(&lfs2, &cfg) => LFS2_ERR_CORRUPT;
 '''
 
 [[case]] # expanding superblock
-define.BLOCK_CYCLES = [32, 33, 1]
+define.LFS2_BLOCK_CYCLES = [32, 33, 1]
 define.N = [10, 100, 1000]
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
     for (int i = 0; i < N; i++) {
-        lfs_mkdir(&lfs, "dummy") => 0;
-        lfs_stat(&lfs, "dummy", &info) => 0;
+        lfs2_file_open(&lfs2, &file, "dummy",
+                LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_EXCL) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
+        lfs2_stat(&lfs2, "dummy", &info) => 0;
         assert(strcmp(info.name, "dummy") == 0);
-        lfs_remove(&lfs, "dummy") => 0;
+        assert(info.type == LFS2_TYPE_REG);
+        lfs2_remove(&lfs2, "dummy") => 0;
     }
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
     // one last check after power-cycle
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_mkdir(&lfs, "dummy") => 0;
-    lfs_stat(&lfs, "dummy", &info) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "dummy",
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_EXCL) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_stat(&lfs2, "dummy", &info) => 0;
     assert(strcmp(info.name, "dummy") == 0);
-    lfs_unmount(&lfs) => 0;
+    assert(info.type == LFS2_TYPE_REG);
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # expanding superblock with power cycle
-define.BLOCK_CYCLES = [32, 33, 1]
+define.LFS2_BLOCK_CYCLES = [32, 33, 1]
 define.N = [10, 100, 1000]
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
     for (int i = 0; i < N; i++) {
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
         // remove lingering dummy?
-        err = lfs_remove(&lfs, "dummy");
-        assert(err == 0 || (err == LFS_ERR_NOENT && i == 0));
-        
-        lfs_mkdir(&lfs, "dummy") => 0;
-        lfs_stat(&lfs, "dummy", &info) => 0;
+        err = lfs2_stat(&lfs2, "dummy", &info);
+        assert(err == 0 || (err == LFS2_ERR_NOENT && i == 0));
+        if (!err) {
+            assert(strcmp(info.name, "dummy") == 0);
+            assert(info.type == LFS2_TYPE_REG);
+            lfs2_remove(&lfs2, "dummy") => 0;
+        }
+
+        lfs2_file_open(&lfs2, &file, "dummy",
+                LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_EXCL) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
+        lfs2_stat(&lfs2, "dummy", &info) => 0;
         assert(strcmp(info.name, "dummy") == 0);
-        lfs_unmount(&lfs) => 0;
+        assert(info.type == LFS2_TYPE_REG);
+        lfs2_unmount(&lfs2) => 0;
     }
 
     // one last check after power-cycle
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_stat(&lfs, "dummy", &info) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_stat(&lfs2, "dummy", &info) => 0;
     assert(strcmp(info.name, "dummy") == 0);
-    lfs_unmount(&lfs) => 0;
+    assert(info.type == LFS2_TYPE_REG);
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # reentrant expanding superblock
-define.BLOCK_CYCLES = [2, 1]
+define.LFS2_BLOCK_CYCLES = [2, 1]
 define.N = 24
 reentrant = true
 code = '''
-    err = lfs_mount(&lfs, &cfg);
+    err = lfs2_mount(&lfs2, &cfg);
     if (err) {
-        lfs_format(&lfs, &cfg) => 0;
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_format(&lfs2, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
     }
 
     for (int i = 0; i < N; i++) {
         // remove lingering dummy?
-        err = lfs_remove(&lfs, "dummy");
-        assert(err == 0 || (err == LFS_ERR_NOENT && i == 0));
-        
-        lfs_mkdir(&lfs, "dummy") => 0;
-        lfs_stat(&lfs, "dummy", &info) => 0;
+        err = lfs2_stat(&lfs2, "dummy", &info);
+        assert(err == 0 || (err == LFS2_ERR_NOENT && i == 0));
+        if (!err) {
+            assert(strcmp(info.name, "dummy") == 0);
+            assert(info.type == LFS2_TYPE_REG);
+            lfs2_remove(&lfs2, "dummy") => 0;
+        }
+
+        lfs2_file_open(&lfs2, &file, "dummy",
+                LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_EXCL) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
+        lfs2_stat(&lfs2, "dummy", &info) => 0;
         assert(strcmp(info.name, "dummy") == 0);
+        assert(info.type == LFS2_TYPE_REG);
     }
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
     // one last check after power-cycle
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_stat(&lfs, "dummy", &info) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_stat(&lfs2, "dummy", &info) => 0;
     assert(strcmp(info.name, "dummy") == 0);
-    lfs_unmount(&lfs) => 0;
+    assert(info.type == LFS2_TYPE_REG);
+    lfs2_unmount(&lfs2) => 0;
 '''

tests/test_truncate.toml

@@ -2,198 +2,198 @@
 define.MEDIUMSIZE = [32, 2048]
 define.LARGESIZE = 8192
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "baldynoop",
-            LFS_O_WRONLY | LFS_O_CREAT) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "baldynoop",
+            LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
 
     strcpy((char*)buffer, "hair");
     size = strlen((char*)buffer);
-    for (lfs_off_t j = 0; j < LARGESIZE; j += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+    for (lfs2_off_t j = 0; j < LARGESIZE; j += size) {
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_size(&lfs, &file) => LARGESIZE;
+    lfs2_file_size(&lfs2, &file) => LARGESIZE;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
     
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "baldynoop", LFS_O_RDWR) => 0;
-    lfs_file_size(&lfs, &file) => LARGESIZE;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "baldynoop", LFS2_O_RDWR) => 0;
+    lfs2_file_size(&lfs2, &file) => LARGESIZE;
 
-    lfs_file_truncate(&lfs, &file, MEDIUMSIZE) => 0;
-    lfs_file_size(&lfs, &file) => MEDIUMSIZE;
+    lfs2_file_truncate(&lfs2, &file, MEDIUMSIZE) => 0;
+    lfs2_file_size(&lfs2, &file) => MEDIUMSIZE;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "baldynoop", LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => MEDIUMSIZE;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "baldynoop", LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => MEDIUMSIZE;
 
     size = strlen("hair");
-    for (lfs_off_t j = 0; j < MEDIUMSIZE; j += size) {
-        lfs_file_read(&lfs, &file, buffer, size) => size;
+    for (lfs2_off_t j = 0; j < MEDIUMSIZE; j += size) {
+        lfs2_file_read(&lfs2, &file, buffer, size) => size;
         memcmp(buffer, "hair", size) => 0;
     }
-    lfs_file_read(&lfs, &file, buffer, size) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, size) => 0;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # truncate and read
 define.MEDIUMSIZE = [32, 2048]
 define.LARGESIZE = 8192
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "baldyread",
-            LFS_O_WRONLY | LFS_O_CREAT) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "baldyread",
+            LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
 
     strcpy((char*)buffer, "hair");
     size = strlen((char*)buffer);
-    for (lfs_off_t j = 0; j < LARGESIZE; j += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+    for (lfs2_off_t j = 0; j < LARGESIZE; j += size) {
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_size(&lfs, &file) => LARGESIZE;
+    lfs2_file_size(&lfs2, &file) => LARGESIZE;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "baldyread", LFS_O_RDWR) => 0;
-    lfs_file_size(&lfs, &file) => LARGESIZE;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "baldyread", LFS2_O_RDWR) => 0;
+    lfs2_file_size(&lfs2, &file) => LARGESIZE;
 
-    lfs_file_truncate(&lfs, &file, MEDIUMSIZE) => 0;
-    lfs_file_size(&lfs, &file) => MEDIUMSIZE;
+    lfs2_file_truncate(&lfs2, &file, MEDIUMSIZE) => 0;
+    lfs2_file_size(&lfs2, &file) => MEDIUMSIZE;
 
     size = strlen("hair");
-    for (lfs_off_t j = 0; j < MEDIUMSIZE; j += size) {
-        lfs_file_read(&lfs, &file, buffer, size) => size;
+    for (lfs2_off_t j = 0; j < MEDIUMSIZE; j += size) {
+        lfs2_file_read(&lfs2, &file, buffer, size) => size;
         memcmp(buffer, "hair", size) => 0;
     }
-    lfs_file_read(&lfs, &file, buffer, size) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, size) => 0;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "baldyread", LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => MEDIUMSIZE;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "baldyread", LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => MEDIUMSIZE;
 
     size = strlen("hair");
-    for (lfs_off_t j = 0; j < MEDIUMSIZE; j += size) {
-        lfs_file_read(&lfs, &file, buffer, size) => size;
+    for (lfs2_off_t j = 0; j < MEDIUMSIZE; j += size) {
+        lfs2_file_read(&lfs2, &file, buffer, size) => size;
         memcmp(buffer, "hair", size) => 0;
     }
-    lfs_file_read(&lfs, &file, buffer, size) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, size) => 0;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # write, truncate, and read
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "sequence",
-            LFS_O_RDWR | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "sequence",
+            LFS2_O_RDWR | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
 
-    size = lfs_min(lfs.cfg->cache_size, sizeof(buffer)/2);
-    lfs_size_t qsize = size / 4;
+    size = lfs2_min(lfs2.cfg->cache_size, sizeof(buffer)/2);
+    lfs2_size_t qsize = size / 4;
     uint8_t *wb = buffer;
     uint8_t *rb = buffer + size;
-    for (lfs_off_t j = 0; j < size; ++j) {
+    for (lfs2_off_t j = 0; j < size; ++j) {
         wb[j] = j;
     }
 
     /* Spread sequence over size */
-    lfs_file_write(&lfs, &file, wb, size) => size;
-    lfs_file_size(&lfs, &file) => size;
-    lfs_file_tell(&lfs, &file) => size;
+    lfs2_file_write(&lfs2, &file, wb, size) => size;
+    lfs2_file_size(&lfs2, &file) => size;
+    lfs2_file_tell(&lfs2, &file) => size;
 
-    lfs_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
-    lfs_file_tell(&lfs, &file) => 0;
+    lfs2_file_seek(&lfs2, &file, 0, LFS2_SEEK_SET) => 0;
+    lfs2_file_tell(&lfs2, &file) => 0;
 
     /* Chop off the last quarter */
-    lfs_size_t trunc = size - qsize;
-    lfs_file_truncate(&lfs, &file, trunc) => 0;
-    lfs_file_tell(&lfs, &file) => 0;
-    lfs_file_size(&lfs, &file) => trunc;
+    lfs2_size_t trunc = size - qsize;
+    lfs2_file_truncate(&lfs2, &file, trunc) => 0;
+    lfs2_file_tell(&lfs2, &file) => 0;
+    lfs2_file_size(&lfs2, &file) => trunc;
 
     /* Read should produce first 3/4 */
-    lfs_file_read(&lfs, &file, rb, size) => trunc;
+    lfs2_file_read(&lfs2, &file, rb, size) => trunc;
     memcmp(rb, wb, trunc) => 0;
 
     /* Move to 1/4 */
-    lfs_file_size(&lfs, &file) => trunc;
-    lfs_file_seek(&lfs, &file, qsize, LFS_SEEK_SET) => qsize;
-    lfs_file_tell(&lfs, &file) => qsize;
+    lfs2_file_size(&lfs2, &file) => trunc;
+    lfs2_file_seek(&lfs2, &file, qsize, LFS2_SEEK_SET) => qsize;
+    lfs2_file_tell(&lfs2, &file) => qsize;
 
     /* Chop to 1/2 */
     trunc -= qsize;
-    lfs_file_truncate(&lfs, &file, trunc) => 0;
-    lfs_file_tell(&lfs, &file) => qsize;
-    lfs_file_size(&lfs, &file) => trunc;
+    lfs2_file_truncate(&lfs2, &file, trunc) => 0;
+    lfs2_file_tell(&lfs2, &file) => qsize;
+    lfs2_file_size(&lfs2, &file) => trunc;
     
     /* Read should produce second quarter */
-    lfs_file_read(&lfs, &file, rb, size) => trunc - qsize;
+    lfs2_file_read(&lfs2, &file, rb, size) => trunc - qsize;
     memcmp(rb, wb + qsize, trunc - qsize) => 0;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # truncate and write
 define.MEDIUMSIZE = [32, 2048]
 define.LARGESIZE = 8192
 code = '''
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "baldywrite",
-            LFS_O_WRONLY | LFS_O_CREAT) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "baldywrite",
+            LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
 
     strcpy((char*)buffer, "hair");
     size = strlen((char*)buffer);
-    for (lfs_off_t j = 0; j < LARGESIZE; j += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+    for (lfs2_off_t j = 0; j < LARGESIZE; j += size) {
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_size(&lfs, &file) => LARGESIZE;
+    lfs2_file_size(&lfs2, &file) => LARGESIZE;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "baldywrite", LFS_O_RDWR) => 0;
-    lfs_file_size(&lfs, &file) => LARGESIZE;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "baldywrite", LFS2_O_RDWR) => 0;
+    lfs2_file_size(&lfs2, &file) => LARGESIZE;
 
-    lfs_file_truncate(&lfs, &file, MEDIUMSIZE) => 0;
-    lfs_file_size(&lfs, &file) => MEDIUMSIZE;
+    lfs2_file_truncate(&lfs2, &file, MEDIUMSIZE) => 0;
+    lfs2_file_size(&lfs2, &file) => MEDIUMSIZE;
 
     strcpy((char*)buffer, "bald");
     size = strlen((char*)buffer);
-    for (lfs_off_t j = 0; j < MEDIUMSIZE; j += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+    for (lfs2_off_t j = 0; j < MEDIUMSIZE; j += size) {
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_size(&lfs, &file) => MEDIUMSIZE;
+    lfs2_file_size(&lfs2, &file) => MEDIUMSIZE;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
-    lfs_file_open(&lfs, &file, "baldywrite", LFS_O_RDONLY) => 0;
-    lfs_file_size(&lfs, &file) => MEDIUMSIZE;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "baldywrite", LFS2_O_RDONLY) => 0;
+    lfs2_file_size(&lfs2, &file) => MEDIUMSIZE;
 
     size = strlen("bald");
-    for (lfs_off_t j = 0; j < MEDIUMSIZE; j += size) {
-        lfs_file_read(&lfs, &file, buffer, size) => size;
+    for (lfs2_off_t j = 0; j < MEDIUMSIZE; j += size) {
+        lfs2_file_read(&lfs2, &file, buffer, size) => size;
         memcmp(buffer, "bald", size) => 0;
     }
-    lfs_file_read(&lfs, &file, buffer, size) => 0;
+    lfs2_file_read(&lfs2, &file, buffer, size) => 0;
 
-    lfs_file_close(&lfs, &file) => 0;
-    lfs_unmount(&lfs) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # truncate write under powerloss
@@ -202,64 +202,64 @@ define.MEDIUMSIZE = [32, 1024]
 define.LARGESIZE = 2048
 reentrant = true
 code = '''
-    err = lfs_mount(&lfs, &cfg);
+    err = lfs2_mount(&lfs2, &cfg);
     if (err) {
-        lfs_format(&lfs, &cfg) => 0;
-        lfs_mount(&lfs, &cfg) => 0;
+        lfs2_format(&lfs2, &cfg) => 0;
+        lfs2_mount(&lfs2, &cfg) => 0;
     }
-    err = lfs_file_open(&lfs, &file, "baldy", LFS_O_RDONLY);
-    assert(!err || err == LFS_ERR_NOENT);
+    err = lfs2_file_open(&lfs2, &file, "baldy", LFS2_O_RDONLY);
+    assert(!err || err == LFS2_ERR_NOENT);
     if (!err) {
-        size = lfs_file_size(&lfs, &file);
+        size = lfs2_file_size(&lfs2, &file);
         assert(size == 0 ||
                 size == LARGESIZE ||
                 size == MEDIUMSIZE ||
                 size == SMALLSIZE);
-        for (lfs_off_t j = 0; j < size; j += 4) {
-            lfs_file_read(&lfs, &file, buffer, 4) => 4;
+        for (lfs2_off_t j = 0; j < size; j += 4) {
+            lfs2_file_read(&lfs2, &file, buffer, 4) => 4;
             assert(memcmp(buffer, "hair", 4) == 0 ||
                    memcmp(buffer, "bald", 4) == 0 ||
                    memcmp(buffer, "comb", 4) == 0);
         }
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
 
-    lfs_file_open(&lfs, &file, "baldy",
-            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
-    lfs_file_size(&lfs, &file) => 0;
+    lfs2_file_open(&lfs2, &file, "baldy",
+            LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
+    lfs2_file_size(&lfs2, &file) => 0;
     strcpy((char*)buffer, "hair");
     size = strlen((char*)buffer);
-    for (lfs_off_t j = 0; j < LARGESIZE; j += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+    for (lfs2_off_t j = 0; j < LARGESIZE; j += size) {
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_size(&lfs, &file) => LARGESIZE;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_size(&lfs2, &file) => LARGESIZE;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_file_open(&lfs, &file, "baldy", LFS_O_RDWR) => 0;
-    lfs_file_size(&lfs, &file) => LARGESIZE;
-    lfs_file_truncate(&lfs, &file, MEDIUMSIZE) => 0;
-    lfs_file_size(&lfs, &file) => MEDIUMSIZE;
+    lfs2_file_open(&lfs2, &file, "baldy", LFS2_O_RDWR) => 0;
+    lfs2_file_size(&lfs2, &file) => LARGESIZE;
+    lfs2_file_truncate(&lfs2, &file, MEDIUMSIZE) => 0;
+    lfs2_file_size(&lfs2, &file) => MEDIUMSIZE;
     strcpy((char*)buffer, "bald");
     size = strlen((char*)buffer);
-    for (lfs_off_t j = 0; j < MEDIUMSIZE; j += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+    for (lfs2_off_t j = 0; j < MEDIUMSIZE; j += size) {
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_size(&lfs, &file) => MEDIUMSIZE;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_size(&lfs2, &file) => MEDIUMSIZE;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_file_open(&lfs, &file, "baldy", LFS_O_RDWR) => 0;
-    lfs_file_size(&lfs, &file) => MEDIUMSIZE;
-    lfs_file_truncate(&lfs, &file, SMALLSIZE) => 0;
-    lfs_file_size(&lfs, &file) => SMALLSIZE;
+    lfs2_file_open(&lfs2, &file, "baldy", LFS2_O_RDWR) => 0;
+    lfs2_file_size(&lfs2, &file) => MEDIUMSIZE;
+    lfs2_file_truncate(&lfs2, &file, SMALLSIZE) => 0;
+    lfs2_file_size(&lfs2, &file) => SMALLSIZE;
     strcpy((char*)buffer, "comb");
     size = strlen((char*)buffer);
-    for (lfs_off_t j = 0; j < SMALLSIZE; j += size) {
-        lfs_file_write(&lfs, &file, buffer, size) => size;
+    for (lfs2_off_t j = 0; j < SMALLSIZE; j += size) {
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
     }
-    lfs_file_size(&lfs, &file) => SMALLSIZE;
-    lfs_file_close(&lfs, &file) => 0;
+    lfs2_file_size(&lfs2, &file) => SMALLSIZE;
+    lfs2_file_close(&lfs2, &file) => 0;
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''
 
 [[case]] # more aggressive general truncation tests
@@ -270,10 +270,10 @@ define.LARGESIZE = 8192
 code = '''
     #define COUNT 5
     const struct {
-        lfs_off_t startsizes[COUNT];
-        lfs_off_t startseeks[COUNT];
-        lfs_off_t hotsizes[COUNT];
-        lfs_off_t coldsizes[COUNT];
+        lfs2_off_t startsizes[COUNT];
+        lfs2_off_t startseeks[COUNT];
+        lfs2_off_t hotsizes[COUNT];
+        lfs2_off_t coldsizes[COUNT];
     } configs[] = {
         // cold shrinking
         {{2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE},
@@ -307,88 +307,133 @@ code = '''
          {2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE}},
     };
 
-    const lfs_off_t *startsizes = configs[CONFIG].startsizes;
-    const lfs_off_t *startseeks = configs[CONFIG].startseeks;
-    const lfs_off_t *hotsizes   = configs[CONFIG].hotsizes;
-    const lfs_off_t *coldsizes  = configs[CONFIG].coldsizes;
+    const lfs2_off_t *startsizes = configs[CONFIG].startsizes;
+    const lfs2_off_t *startseeks = configs[CONFIG].startseeks;
+    const lfs2_off_t *hotsizes   = configs[CONFIG].hotsizes;
+    const lfs2_off_t *coldsizes  = configs[CONFIG].coldsizes;
 
-    lfs_format(&lfs, &cfg) => 0;
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     for (unsigned i = 0; i < COUNT; i++) {
         sprintf(path, "hairyhead%d", i);
-        lfs_file_open(&lfs, &file, path,
-                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
+        lfs2_file_open(&lfs2, &file, path,
+                LFS2_O_WRONLY | LFS2_O_CREAT | LFS2_O_TRUNC) => 0;
 
         strcpy((char*)buffer, "hair");
         size = strlen((char*)buffer);
-        for (lfs_off_t j = 0; j < startsizes[i]; j += size) {
-            lfs_file_write(&lfs, &file, buffer, size) => size;
+        for (lfs2_off_t j = 0; j < startsizes[i]; j += size) {
+            lfs2_file_write(&lfs2, &file, buffer, size) => size;
         }
-        lfs_file_size(&lfs, &file) => startsizes[i];
+        lfs2_file_size(&lfs2, &file) => startsizes[i];
 
         if (startseeks[i] != startsizes[i]) {
-            lfs_file_seek(&lfs, &file,
-                    startseeks[i], LFS_SEEK_SET) => startseeks[i];
+            lfs2_file_seek(&lfs2, &file,
+                    startseeks[i], LFS2_SEEK_SET) => startseeks[i];
         }
 
-        lfs_file_truncate(&lfs, &file, hotsizes[i]) => 0;
-        lfs_file_size(&lfs, &file) => hotsizes[i];
+        lfs2_file_truncate(&lfs2, &file, hotsizes[i]) => 0;
+        lfs2_file_size(&lfs2, &file) => hotsizes[i];
 
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     for (unsigned i = 0; i < COUNT; i++) {
         sprintf(path, "hairyhead%d", i);
-        lfs_file_open(&lfs, &file, path, LFS_O_RDWR) => 0;
-        lfs_file_size(&lfs, &file) => hotsizes[i];
+        lfs2_file_open(&lfs2, &file, path, LFS2_O_RDWR) => 0;
+        lfs2_file_size(&lfs2, &file) => hotsizes[i];
 
         size = strlen("hair");
-        lfs_off_t j = 0;
+        lfs2_off_t j = 0;
         for (; j < startsizes[i] && j < hotsizes[i]; j += size) {
-            lfs_file_read(&lfs, &file, buffer, size) => size;
+            lfs2_file_read(&lfs2, &file, buffer, size) => size;
             memcmp(buffer, "hair", size) => 0;
         }
 
         for (; j < hotsizes[i]; j += size) {
-            lfs_file_read(&lfs, &file, buffer, size) => size;
+            lfs2_file_read(&lfs2, &file, buffer, size) => size;
             memcmp(buffer, "\0\0\0\0", size) => 0;
         }
 
-        lfs_file_truncate(&lfs, &file, coldsizes[i]) => 0;
-        lfs_file_size(&lfs, &file) => coldsizes[i];
+        lfs2_file_truncate(&lfs2, &file, coldsizes[i]) => 0;
+        lfs2_file_size(&lfs2, &file) => coldsizes[i];
 
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
 
-    lfs_mount(&lfs, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
 
     for (unsigned i = 0; i < COUNT; i++) {
         sprintf(path, "hairyhead%d", i);
-        lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
-        lfs_file_size(&lfs, &file) => coldsizes[i];
+        lfs2_file_open(&lfs2, &file, path, LFS2_O_RDONLY) => 0;
+        lfs2_file_size(&lfs2, &file) => coldsizes[i];
 
         size = strlen("hair");
-        lfs_off_t j = 0;
+        lfs2_off_t j = 0;
         for (; j < startsizes[i] && j < hotsizes[i] && j < coldsizes[i];
                 j += size) {
-            lfs_file_read(&lfs, &file, buffer, size) => size;
+            lfs2_file_read(&lfs2, &file, buffer, size) => size;
             memcmp(buffer, "hair", size) => 0;
         }
 
         for (; j < coldsizes[i]; j += size) {
-            lfs_file_read(&lfs, &file, buffer, size) => size;
+            lfs2_file_read(&lfs2, &file, buffer, size) => size;
             memcmp(buffer, "\0\0\0\0", size) => 0;
         }
 
-        lfs_file_close(&lfs, &file) => 0;
+        lfs2_file_close(&lfs2, &file) => 0;
     }
 
-    lfs_unmount(&lfs) => 0;
+    lfs2_unmount(&lfs2) => 0;
+'''
+
+[[case]] # noop truncate
+define.MEDIUMSIZE = [32, 2048]
+code = '''
+    lfs2_format(&lfs2, &cfg) => 0;
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "baldynoop",
+            LFS2_O_RDWR | LFS2_O_CREAT) => 0;
+
+    strcpy((char*)buffer, "hair");
+    size = strlen((char*)buffer);
+    for (lfs2_off_t j = 0; j < MEDIUMSIZE; j += size) {
+        lfs2_file_write(&lfs2, &file, buffer, size) => size;
+
+        // this truncate should do nothing
+        lfs2_file_truncate(&lfs2, &file, j+size) => 0;
+    }
+    lfs2_file_size(&lfs2, &file) => MEDIUMSIZE;
+
+    lfs2_file_seek(&lfs2, &file, 0, LFS2_SEEK_SET) => 0;
+    // should do nothing again
+    lfs2_file_truncate(&lfs2, &file, MEDIUMSIZE) => 0;
+    lfs2_file_size(&lfs2, &file) => MEDIUMSIZE;
+
+    for (lfs2_off_t j = 0; j < MEDIUMSIZE; j += size) {
+        lfs2_file_read(&lfs2, &file, buffer, size) => size;
+        memcmp(buffer, "hair", size) => 0;
+    }
+    lfs2_file_read(&lfs2, &file, buffer, size) => 0;
+
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
+
+    // still there after reboot?
+    lfs2_mount(&lfs2, &cfg) => 0;
+    lfs2_file_open(&lfs2, &file, "baldynoop", LFS2_O_RDWR) => 0;
+    lfs2_file_size(&lfs2, &file) => MEDIUMSIZE;
+    for (lfs2_off_t j = 0; j < MEDIUMSIZE; j += size) {
+        lfs2_file_read(&lfs2, &file, buffer, size) => size;
+        memcmp(buffer, "hair", size) => 0;
+    }
+    lfs2_file_read(&lfs2, &file, buffer, size) => 0;
+    lfs2_file_close(&lfs2, &file) => 0;
+    lfs2_unmount(&lfs2) => 0;
 '''