mirror of
https://github.com/eledio-devices/thirdparty-littlefs.git
synced 2025-11-01 00:38:29 +01:00
fd1da602d7
This provides a limited form of wear leveling. While wear is not actually balanced across blocks, the filesystem can recover from corrupted blocks and extend the lifetime of a device nearly as much as dynamic wear leveling. For use-cases where wear is important, it would be better to use a full form of dynamic wear-leveling at the block level. (or consider a logging filesystem). Corrupted block handling was simply added on top of the existing logic in place for the filesystem, so it's a bit more noodly than it may have to be, but it gets the work done.
107 lines
2.3 KiB
Bash
Executable File
107 lines
2.3 KiB
Bash
Executable File
#!/bin/bash
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set -eu
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echo "=== Corrupt tests ==="
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NAMEMULT=64
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FILEMULT=1
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lfs_mktree() {
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tests/test.py ${1:-} << TEST
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lfs_format(&lfs, &cfg) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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for (int i = 1; i < 10; i++) {
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for (int j = 0; j < $NAMEMULT; j++) {
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buffer[j] = '0'+i;
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}
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buffer[$NAMEMULT] = '\0';
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lfs_mkdir(&lfs, (char*)buffer) => 0;
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buffer[$NAMEMULT] = '/';
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for (int j = 0; j < $NAMEMULT; j++) {
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buffer[j+$NAMEMULT+1] = '0'+i;
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}
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buffer[2*$NAMEMULT+1] = '\0';
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lfs_file_open(&lfs, &file[0], (char*)buffer,
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LFS_O_WRONLY | LFS_O_CREAT) => 0;
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size = $NAMEMULT;
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for (int j = 0; j < i*$FILEMULT; j++) {
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lfs_file_write(&lfs, &file[0], buffer, size) => size;
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}
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lfs_file_close(&lfs, &file[0]) => 0;
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}
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lfs_unmount(&lfs) => 0;
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TEST
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}
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lfs_chktree() {
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tests/test.py ${1:-} << TEST
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lfs_mount(&lfs, &cfg) => 0;
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for (int i = 1; i < 10; i++) {
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for (int j = 0; j < $NAMEMULT; j++) {
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buffer[j] = '0'+i;
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}
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buffer[$NAMEMULT] = '\0';
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lfs_stat(&lfs, (char*)buffer, &info) => 0;
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info.type => LFS_TYPE_DIR;
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buffer[$NAMEMULT] = '/';
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for (int j = 0; j < $NAMEMULT; j++) {
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buffer[j+$NAMEMULT+1] = '0'+i;
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}
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buffer[2*$NAMEMULT+1] = '\0';
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lfs_file_open(&lfs, &file[0], (char*)buffer, LFS_O_RDONLY) => 0;
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size = $NAMEMULT;
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for (int j = 0; j < i*$FILEMULT; j++) {
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lfs_file_read(&lfs, &file[0], rbuffer, size) => size;
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memcmp(buffer, rbuffer, size) => 0;
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}
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lfs_file_close(&lfs, &file[0]) => 0;
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}
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lfs_unmount(&lfs) => 0;
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TEST
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}
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echo "--- Sanity check ---"
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rm -rf blocks
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lfs_mktree
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lfs_chktree
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echo "--- Block corruption ---"
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for i in {0..33}
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do
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rm -rf blocks
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mkdir blocks
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ln -s /dev/zero blocks/$(printf '%x' $i)
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lfs_mktree
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lfs_chktree
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done
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echo "--- Big region corruption ---"
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rm -rf blocks
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mkdir blocks
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for i in {2..255}
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do
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ln -s /dev/zero blocks/$(printf '%x' $i)
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done
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lfs_mktree
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lfs_chktree
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echo "--- Alternating corruption ---"
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rm -rf blocks
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mkdir blocks
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for i in {2..511..2}
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do
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ln -s /dev/zero blocks/$(printf '%x' $i)
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done
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lfs_mktree
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lfs_chktree
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echo "--- Results ---"
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tests/stats.py
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