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Exploring ideas for static configuration

Browse Source 
As an embedded library, littlefs's configuration straddles two worlds.
In most cases the configuration is usually constant at build time, but
when integrated into OSs, the configuration needs to be dynamically
configurable.

To help with this, littlefs has a separate lfs_config struct that can be
placed into ROM when possible.

But you know what's better than ROM configuration? Truely inlinable
static configuration known at compile-time. In addition to avoiding the
RAM cost, compile-time configuration allows for additional compiler
optimizations, such as constexpr-elimination and removal of unused
code-paths.

So how to enable static configuration?

1. define LFS_STATICCFG
2. implement callbacks as global functions:
   - lfs_read
   - lfs_prog
   - lfs_erase
   - lfs_sync
2. define the now-required constants that configure littlefs:
   - LFS_READ_SIZE
   - LFS_PROG_SIZE
   - LFS_BLOCK_SIZE
   - LFS_BLOCK_COUNT
   - LFS_BLOCK_CYCLES
   - LFS_CACHE_SIZE
   - LFS_LOOKAHEAD_SIZE
   - LFS_READ_BUFFER (optional)
   - LFS_PROG_BUFFER (optional)
   - LFS_LOOKAHEAD_BUFFER (optional)
   - LFS_NAME_MAX (optional)
   - LFS_FILE_MAX (optional)
   - LFS_ATTR_MAX (optional)

Note, there is a separate configuration for the file configuration, this
can be enabled/disabled independently of LFS_STATICCFG. You will likely
want to define this as well if you are looking for the smallest code
size.

In order to avoid a mess of #ifdefs, the internals of littlefs use a
simple macro that redirects to either the dynamic or static config at
compile time:

    #ifdef LFS_STATICCFG
    #define LFS_CFG_READ_SIZE(lfs) ((void)lfs, LFS_READ_SIZE)
    #else
    #define LFS_CFG_READ_SIZE(lfs) lfs->cfg->read_size
    #endif

Unfortunately it does look like there still may be a lot of issues
related to warnings of comparisons against constants... If only C had
a way to ignore warnings on individual statements...

Original idea by apmorton
This commit is contained in:
Christopher Haster
2020-11-23 00:53:07 -06:00
parent ef9ba2d912
commit c44427f9ec
18 changed files with 873 additions and 627 deletions
Download Patch File Download Diff File Expand all files Collapse all files

152
tests/test_move.toml
View File

@@ -1,7 +1,7 @@
[[case]] # move file
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "a") => 0;
lfs_mkdir(&lfs, "b") => 0;
lfs_mkdir(&lfs, "c") => 0;
@@ -13,11 +13,11 @@ code = '''
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_rename(&lfs, "a/hello", "c/hello") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
@@ -57,8 +57,8 @@ code = '''
[[case]] # noop move, yes this is legal
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "hi") => 0;
lfs_rename(&lfs, "hi", "hi") => 0;
lfs_mkdir(&lfs, "hi/hi") => 0;
@@ -74,8 +74,8 @@ code = '''
[[case]] # move file corrupt source
in = "lfs.c"
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "a") => 0;
lfs_mkdir(&lfs, "b") => 0;
lfs_mkdir(&lfs, "c") => 0;
@@ -87,12 +87,12 @@ code = '''
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_rename(&lfs, "a/hello", "c/hello") => 0;
lfs_unmount(&lfs) => 0;
// corrupt the source
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_block_t block = dir.m.pair[0];
lfs_dir_close(&lfs, &dir) => 0;
@@ -108,7 +108,7 @@ code = '''
cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
cfg.sync(&cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
@@ -150,8 +150,8 @@ code = '''
in = "lfs.c"
if = 'LFS_PROG_SIZE <= 0x3fe' # only works with one crc per commit
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "a") => 0;
lfs_mkdir(&lfs, "b") => 0;
lfs_mkdir(&lfs, "c") => 0;
@@ -163,12 +163,12 @@ code = '''
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_rename(&lfs, "a/hello", "c/hello") => 0;
lfs_unmount(&lfs) => 0;
// corrupt the source
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_block_t block = dir.m.pair[0];
lfs_dir_close(&lfs, &dir) => 0;
@@ -185,7 +185,7 @@ code = '''
cfg.sync(&cfg) => 0;
// corrupt the destination
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "c") => 0;
block = dir.m.pair[0];
lfs_dir_close(&lfs, &dir) => 0;
@@ -200,7 +200,7 @@ code = '''
cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
cfg.sync(&cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
@@ -242,8 +242,8 @@ code = '''
in = "lfs.c"
if = 'LFS_PROG_SIZE <= 0x3fe' # only works with one crc per commit
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "a") => 0;
lfs_mkdir(&lfs, "b") => 0;
lfs_mkdir(&lfs, "c") => 0;
@@ -255,12 +255,12 @@ code = '''
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_rename(&lfs, "a/hello", "c/hello") => 0;
lfs_unmount(&lfs) => 0;
// corrupt the source
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_block_t block = dir.m.pair[0];
lfs_dir_close(&lfs, &dir) => 0;
@@ -277,7 +277,7 @@ code = '''
cfg.sync(&cfg) => 0;
// corrupt the destination
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "c") => 0;
block = dir.m.pair[0];
lfs_dir_close(&lfs, &dir) => 0;
@@ -293,11 +293,11 @@ code = '''
cfg.sync(&cfg) => 0;
// continue move
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_rename(&lfs, "a/hello", "c/hello") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
@@ -338,10 +338,10 @@ code = '''
[[case]] # simple reentrant move file
reentrant = true
code = '''
err = lfs_mount(&lfs, &cfg);
err = lfs_mountcfg(&lfs, &cfg);
if (err) {
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
}
err = lfs_mkdir(&lfs, "a");
assert(!err || err == LFS_ERR_EXIST);
@@ -354,7 +354,7 @@ code = '''
lfs_unmount(&lfs) => 0;
while (true) {
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
// there should never exist _2_ hello files
int count = 0;
if (lfs_stat(&lfs, "a/hello", &info) == 0) {
@@ -384,7 +384,7 @@ code = '''
assert(count <= 1);
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
if (lfs_stat(&lfs, "a/hello", &info) == 0 && info.size > 0) {
lfs_rename(&lfs, "a/hello", "b/hello") => 0;
} else if (lfs_stat(&lfs, "b/hello", &info) == 0) {
@@ -407,7 +407,7 @@ code = '''
lfs_unmount(&lfs) => 0;
}
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
@@ -447,8 +447,8 @@ code = '''
[[case]] # move dir
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "a") => 0;
lfs_mkdir(&lfs, "b") => 0;
lfs_mkdir(&lfs, "c") => 0;
@@ -459,11 +459,11 @@ code = '''
lfs_mkdir(&lfs, "a/hi/ohayo") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_rename(&lfs, "a/hi", "c/hi") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
@@ -513,8 +513,8 @@ code = '''
[[case]] # move dir corrupt source
in = "lfs.c"
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "a") => 0;
lfs_mkdir(&lfs, "b") => 0;
lfs_mkdir(&lfs, "c") => 0;
@@ -525,12 +525,12 @@ code = '''
lfs_mkdir(&lfs, "a/hi/ohayo") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_rename(&lfs, "a/hi", "c/hi") => 0;
lfs_unmount(&lfs) => 0;
// corrupt the source
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_block_t block = dir.m.pair[0];
lfs_dir_close(&lfs, &dir) => 0;
@@ -546,7 +546,7 @@ code = '''
cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
cfg.sync(&cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
@@ -597,8 +597,8 @@ code = '''
in = "lfs.c"
if = 'LFS_PROG_SIZE <= 0x3fe' # only works with one crc per commit
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "a") => 0;
lfs_mkdir(&lfs, "b") => 0;
lfs_mkdir(&lfs, "c") => 0;
@@ -609,12 +609,12 @@ code = '''
lfs_mkdir(&lfs, "a/hi/ohayo") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_rename(&lfs, "a/hi", "c/hi") => 0;
lfs_unmount(&lfs) => 0;
// corrupt the source
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_block_t block = dir.m.pair[0];
lfs_dir_close(&lfs, &dir) => 0;
@@ -631,7 +631,7 @@ code = '''
cfg.sync(&cfg) => 0;
// corrupt the destination
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "c") => 0;
block = dir.m.pair[0];
lfs_dir_close(&lfs, &dir) => 0;
@@ -646,7 +646,7 @@ code = '''
cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
cfg.sync(&cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
@@ -697,8 +697,8 @@ code = '''
in = "lfs.c"
if = 'LFS_PROG_SIZE <= 0x3fe' # only works with one crc per commit
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "a") => 0;
lfs_mkdir(&lfs, "b") => 0;
lfs_mkdir(&lfs, "c") => 0;
@@ -709,12 +709,12 @@ code = '''
lfs_mkdir(&lfs, "a/hi/ohayo") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_rename(&lfs, "a/hi", "c/hi") => 0;
lfs_unmount(&lfs) => 0;
// corrupt the source
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_block_t block = dir.m.pair[0];
lfs_dir_close(&lfs, &dir) => 0;
@@ -731,7 +731,7 @@ code = '''
cfg.sync(&cfg) => 0;
// corrupt the destination
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "c") => 0;
block = dir.m.pair[0];
lfs_dir_close(&lfs, &dir) => 0;
@@ -747,11 +747,11 @@ code = '''
cfg.sync(&cfg) => 0;
// continue move
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_rename(&lfs, "a/hi", "c/hi") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
@@ -801,10 +801,10 @@ code = '''
[[case]] # simple reentrant move dir
reentrant = true
code = '''
err = lfs_mount(&lfs, &cfg);
err = lfs_mountcfg(&lfs, &cfg);
if (err) {
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
}
err = lfs_mkdir(&lfs, "a");
assert(!err || err == LFS_ERR_EXIST);
@@ -817,7 +817,7 @@ code = '''
lfs_unmount(&lfs) => 0;
while (true) {
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
// there should never exist _2_ hi directories
int count = 0;
if (lfs_stat(&lfs, "a/hi", &info) == 0) {
@@ -843,7 +843,7 @@ code = '''
assert(count <= 1);
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
if (lfs_stat(&lfs, "a/hi", &info) == 0) {
lfs_rename(&lfs, "a/hi", "b/hi") => 0;
} else if (lfs_stat(&lfs, "b/hi", &info) == 0) {
@@ -868,7 +868,7 @@ code = '''
lfs_unmount(&lfs) => 0;
}
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "a") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
@@ -917,8 +917,8 @@ code = '''
[[case]] # move state stealing
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "a") => 0;
lfs_mkdir(&lfs, "b") => 0;
lfs_mkdir(&lfs, "c") => 0;
@@ -930,17 +930,17 @@ code = '''
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_rename(&lfs, "a/hello", "b/hello") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_rename(&lfs, "b/hello", "c/hello") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_rename(&lfs, "c/hello", "d/hello") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "a/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
lfs_file_open(&lfs, &file, "b/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
lfs_file_open(&lfs, &file, "c/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
@@ -954,12 +954,12 @@ code = '''
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_remove(&lfs, "b") => 0;
lfs_remove(&lfs, "c") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_stat(&lfs, "a", &info) => 0;
lfs_stat(&lfs, "b", &info) => LFS_ERR_NOENT;
lfs_stat(&lfs, "c", &info) => LFS_ERR_NOENT;
@@ -981,8 +981,8 @@ code = '''
# Other specific corner cases
[[case]] # create + delete in same commit with neighbors
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
// littlefs keeps files sorted, so we know the order these will be in
lfs_file_open(&lfs, &file, "/1.move_me",
@@ -1127,8 +1127,8 @@ code = '''
# Other specific corner cases
[[case]] # create + delete + delete in same commit with neighbors
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
// littlefs keeps files sorted, so we know the order these will be in
lfs_file_open(&lfs, &file, "/1.move_me",
@@ -1283,8 +1283,8 @@ code = '''
[[case]] # create + delete in different dirs with neighbors
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
// littlefs keeps files sorted, so we know the order these will be in
lfs_mkdir(&lfs, "/dir.1") => 0;
@@ -1523,8 +1523,8 @@ in = "lfs.c"
define.RELOCATIONS = 'range(0x3+1)'
define.LFS_ERASE_CYCLES = 0xffffffff
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "/parent") => 0;
lfs_mkdir(&lfs, "/parent/child") => 0;
@@ -1660,8 +1660,8 @@ in = "lfs.c"
define.RELOCATIONS = 'range(0x7+1)'
define.LFS_ERASE_CYCLES = 0xffffffff
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_formatcfg(&lfs, &cfg) => 0;
lfs_mountcfg(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "/parent") => 0;
lfs_mkdir(&lfs, "/parent/child") => 0;