mirror of
https://github.com/eledio-devices/thirdparty-littlefs.git
synced 2025-10-31 00:32:38 +01:00
fb65057a3c
Also finished migrating tests with test_relocations and test_exhaustion. The issue I was running into when migrating these tests was a lack of flexibility with what you could do with the block devices. It was possible to hack in some hooks for things like bad blocks and power loss, but it wasn't clean or easily extendable. The solution here was to just put all of these test extensions into a third block device, testbd, that uses the other two example block devices internally. testbd has several useful features for testing. Note this makes it a pretty terrible block device _example_ since these hooks look more complicated than a block device needs to be. - testbd can simulate different erase values, supporting 1s, 0s, other byte patterns, or no erases at all (which can cause surprising bugs). This actually depends on the simulated erase values in ramdb and filebd. I did try to move this out of rambd/filebd, but it's not possible to simulate erases in testbd without buffering entire blocks and creating an excessive amount of extra write operations. - testbd also helps simulate power-loss by containing a "power cycles" counter that is decremented every write operation until it calls exit. This is notably faster than the previous gdb approach, which is valuable since the reentrant tests tend to take a while to resolve. - testbd also tracks wear, which can be manually set and read. This is very useful for testing things like bad block handling, wear leveling, or even changing the effective size of the block device at runtime.
569 lines
18 KiB
TOML
569 lines
18 KiB
TOML
# allocator tests
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# note for these to work there are many constraints on the device geometry
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[[case]] # parallel allocation test
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define.FILES = 3
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define.SIZE = '(((LFS_BLOCK_SIZE-8)*(LFS_BLOCK_COUNT-4)) / FILES)'
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code = '''
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const char *names[FILES] = {"bacon", "eggs", "pancakes"};
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lfs_file_t files[FILES];
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lfs_format(&lfs, &cfg) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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lfs_mkdir(&lfs, "breakfast") => 0;
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lfs_unmount(&lfs) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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for (int n = 0; n < FILES; n++) {
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sprintf(path, "breakfast/%s", names[n]);
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lfs_file_open(&lfs, &files[n], path,
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LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
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}
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for (int n = 0; n < FILES; n++) {
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size = strlen(names[n]);
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for (lfs_size_t i = 0; i < SIZE; i += size) {
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lfs_file_write(&lfs, &files[n], names[n], size) => size;
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}
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}
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for (int n = 0; n < FILES; n++) {
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lfs_file_close(&lfs, &files[n]) => 0;
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}
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lfs_unmount(&lfs) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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for (int n = 0; n < FILES; n++) {
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sprintf(path, "breakfast/%s", names[n]);
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lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
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size = strlen(names[n]);
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for (lfs_size_t i = 0; i < SIZE; i += size) {
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lfs_file_read(&lfs, &file, buffer, size) => size;
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assert(memcmp(buffer, names[n], size) == 0);
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}
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lfs_file_close(&lfs, &file) => 0;
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}
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lfs_unmount(&lfs) => 0;
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'''
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[[case]] # serial allocation test
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define.FILES = 3
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define.SIZE = '(((LFS_BLOCK_SIZE-8)*(LFS_BLOCK_COUNT-4)) / FILES)'
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code = '''
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const char *names[FILES] = {"bacon", "eggs", "pancakes"};
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lfs_format(&lfs, &cfg) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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lfs_mkdir(&lfs, "breakfast") => 0;
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lfs_unmount(&lfs) => 0;
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for (int n = 0; n < FILES; n++) {
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lfs_mount(&lfs, &cfg) => 0;
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sprintf(path, "breakfast/%s", names[n]);
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lfs_file_open(&lfs, &file, path,
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LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
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size = strlen(names[n]);
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memcpy(buffer, names[n], size);
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for (int i = 0; i < SIZE; i += size) {
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lfs_file_write(&lfs, &file, buffer, size) => size;
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}
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lfs_file_close(&lfs, &file) => 0;
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lfs_unmount(&lfs) => 0;
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}
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lfs_mount(&lfs, &cfg) => 0;
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for (int n = 0; n < FILES; n++) {
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sprintf(path, "breakfast/%s", names[n]);
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lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
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size = strlen(names[n]);
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for (int i = 0; i < SIZE; i += size) {
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lfs_file_read(&lfs, &file, buffer, size) => size;
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assert(memcmp(buffer, names[n], size) == 0);
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}
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lfs_file_close(&lfs, &file) => 0;
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}
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lfs_unmount(&lfs) => 0;
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'''
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[[case]] # parallel allocation reuse test
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define.FILES = 3
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define.SIZE = '(((LFS_BLOCK_SIZE-8)*(LFS_BLOCK_COUNT-4)) / FILES)'
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define.CYCLES = [1, 10]
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code = '''
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const char *names[FILES] = {"bacon", "eggs", "pancakes"};
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lfs_file_t files[FILES];
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lfs_format(&lfs, &cfg) => 0;
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for (int c = 0; c < CYCLES; c++) {
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lfs_mount(&lfs, &cfg) => 0;
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lfs_mkdir(&lfs, "breakfast") => 0;
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lfs_unmount(&lfs) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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for (int n = 0; n < FILES; n++) {
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sprintf(path, "breakfast/%s", names[n]);
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lfs_file_open(&lfs, &files[n], path,
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LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
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}
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for (int n = 0; n < FILES; n++) {
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size = strlen(names[n]);
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for (int i = 0; i < SIZE; i += size) {
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lfs_file_write(&lfs, &files[n], names[n], size) => size;
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}
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}
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for (int n = 0; n < FILES; n++) {
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lfs_file_close(&lfs, &files[n]) => 0;
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}
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lfs_unmount(&lfs) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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for (int n = 0; n < FILES; n++) {
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sprintf(path, "breakfast/%s", names[n]);
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lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
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size = strlen(names[n]);
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for (int i = 0; i < SIZE; i += size) {
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lfs_file_read(&lfs, &file, buffer, size) => size;
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assert(memcmp(buffer, names[n], size) == 0);
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}
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lfs_file_close(&lfs, &file) => 0;
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}
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lfs_unmount(&lfs) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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for (int n = 0; n < FILES; n++) {
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sprintf(path, "breakfast/%s", names[n]);
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lfs_remove(&lfs, path) => 0;
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}
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lfs_remove(&lfs, "breakfast") => 0;
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lfs_unmount(&lfs) => 0;
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}
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'''
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[[case]] # serial allocation reuse test
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define.FILES = 3
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define.SIZE = '(((LFS_BLOCK_SIZE-8)*(LFS_BLOCK_COUNT-4)) / FILES)'
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define.CYCLES = [1, 10]
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code = '''
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const char *names[FILES] = {"bacon", "eggs", "pancakes"};
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lfs_format(&lfs, &cfg) => 0;
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for (int c = 0; c < CYCLES; c++) {
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lfs_mount(&lfs, &cfg) => 0;
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lfs_mkdir(&lfs, "breakfast") => 0;
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lfs_unmount(&lfs) => 0;
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for (int n = 0; n < FILES; n++) {
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lfs_mount(&lfs, &cfg) => 0;
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sprintf(path, "breakfast/%s", names[n]);
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lfs_file_open(&lfs, &file, path,
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LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
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size = strlen(names[n]);
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memcpy(buffer, names[n], size);
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for (int i = 0; i < SIZE; i += size) {
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lfs_file_write(&lfs, &file, buffer, size) => size;
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}
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lfs_file_close(&lfs, &file) => 0;
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lfs_unmount(&lfs) => 0;
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}
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lfs_mount(&lfs, &cfg) => 0;
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for (int n = 0; n < FILES; n++) {
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sprintf(path, "breakfast/%s", names[n]);
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lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
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size = strlen(names[n]);
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for (int i = 0; i < SIZE; i += size) {
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lfs_file_read(&lfs, &file, buffer, size) => size;
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assert(memcmp(buffer, names[n], size) == 0);
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}
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lfs_file_close(&lfs, &file) => 0;
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}
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lfs_unmount(&lfs) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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for (int n = 0; n < FILES; n++) {
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sprintf(path, "breakfast/%s", names[n]);
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lfs_remove(&lfs, path) => 0;
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}
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lfs_remove(&lfs, "breakfast") => 0;
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lfs_unmount(&lfs) => 0;
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}
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'''
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[[case]] # exhaustion test
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code = '''
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lfs_format(&lfs, &cfg) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
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size = strlen("exhaustion");
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memcpy(buffer, "exhaustion", size);
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lfs_file_write(&lfs, &file, buffer, size) => size;
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lfs_file_sync(&lfs, &file) => 0;
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size = strlen("blahblahblahblah");
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memcpy(buffer, "blahblahblahblah", size);
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lfs_ssize_t res;
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while (true) {
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res = lfs_file_write(&lfs, &file, buffer, size);
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if (res < 0) {
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break;
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}
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res => size;
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}
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res => LFS_ERR_NOSPC;
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lfs_file_close(&lfs, &file) => 0;
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lfs_unmount(&lfs) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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lfs_file_open(&lfs, &file, "exhaustion", LFS_O_RDONLY);
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size = strlen("exhaustion");
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lfs_file_size(&lfs, &file) => size;
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lfs_file_read(&lfs, &file, buffer, size) => size;
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memcmp(buffer, "exhaustion", size) => 0;
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lfs_file_close(&lfs, &file) => 0;
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lfs_unmount(&lfs) => 0;
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'''
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[[case]] # exhaustion wraparound test
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define.SIZE = '(((LFS_BLOCK_SIZE-8)*(LFS_BLOCK_COUNT-4)) / 3)'
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code = '''
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lfs_format(&lfs, &cfg) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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lfs_file_open(&lfs, &file, "padding", LFS_O_WRONLY | LFS_O_CREAT);
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size = strlen("buffering");
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memcpy(buffer, "buffering", size);
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for (int i = 0; i < SIZE; i += size) {
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lfs_file_write(&lfs, &file, buffer, size) => size;
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}
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lfs_file_close(&lfs, &file) => 0;
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lfs_remove(&lfs, "padding") => 0;
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lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
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size = strlen("exhaustion");
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memcpy(buffer, "exhaustion", size);
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lfs_file_write(&lfs, &file, buffer, size) => size;
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lfs_file_sync(&lfs, &file) => 0;
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size = strlen("blahblahblahblah");
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memcpy(buffer, "blahblahblahblah", size);
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lfs_ssize_t res;
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while (true) {
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res = lfs_file_write(&lfs, &file, buffer, size);
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if (res < 0) {
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break;
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}
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res => size;
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}
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res => LFS_ERR_NOSPC;
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lfs_file_close(&lfs, &file) => 0;
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lfs_unmount(&lfs) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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lfs_file_open(&lfs, &file, "exhaustion", LFS_O_RDONLY);
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size = strlen("exhaustion");
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lfs_file_size(&lfs, &file) => size;
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lfs_file_read(&lfs, &file, buffer, size) => size;
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memcmp(buffer, "exhaustion", size) => 0;
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lfs_file_close(&lfs, &file) => 0;
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lfs_remove(&lfs, "exhaustion") => 0;
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lfs_unmount(&lfs) => 0;
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'''
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[[case]] # dir exhaustion test
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code = '''
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lfs_format(&lfs, &cfg) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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// find out max file size
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lfs_mkdir(&lfs, "exhaustiondir") => 0;
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size = strlen("blahblahblahblah");
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memcpy(buffer, "blahblahblahblah", size);
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lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
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int count = 0;
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while (true) {
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err = lfs_file_write(&lfs, &file, buffer, size);
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if (err < 0) {
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break;
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}
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count += 1;
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}
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err => LFS_ERR_NOSPC;
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lfs_file_close(&lfs, &file) => 0;
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lfs_remove(&lfs, "exhaustion") => 0;
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lfs_remove(&lfs, "exhaustiondir") => 0;
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// see if dir fits with max file size
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lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
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for (int i = 0; i < count; i++) {
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lfs_file_write(&lfs, &file, buffer, size) => size;
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}
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lfs_file_close(&lfs, &file) => 0;
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lfs_mkdir(&lfs, "exhaustiondir") => 0;
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lfs_remove(&lfs, "exhaustiondir") => 0;
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lfs_remove(&lfs, "exhaustion") => 0;
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// see if dir fits with > max file size
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lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
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for (int i = 0; i < count+1; i++) {
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lfs_file_write(&lfs, &file, buffer, size) => size;
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}
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lfs_file_close(&lfs, &file) => 0;
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lfs_mkdir(&lfs, "exhaustiondir") => LFS_ERR_NOSPC;
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lfs_remove(&lfs, "exhaustion") => 0;
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lfs_unmount(&lfs) => 0;
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'''
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# Below, I don't like these tests. They're fragile and depend _heavily_
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# on the geometry of the block device. But they are valuable. Eventually they
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# should be removed and replaced with generalized tests.
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[[case]] # chained dir exhaustion test
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define.LFS_BLOCK_SIZE = 512
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define.LFS_BLOCK_COUNT = 1024
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if = 'LFS_BLOCK_SIZE == 512 and LFS_BLOCK_COUNT == 1024'
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code = '''
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lfs_format(&lfs, &cfg) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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// find out max file size
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lfs_mkdir(&lfs, "exhaustiondir") => 0;
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for (int i = 0; i < 10; i++) {
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sprintf(path, "dirwithanexhaustivelylongnameforpadding%d", i);
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lfs_mkdir(&lfs, path) => 0;
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}
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size = strlen("blahblahblahblah");
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memcpy(buffer, "blahblahblahblah", size);
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lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
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int count = 0;
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while (true) {
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err = lfs_file_write(&lfs, &file, buffer, size);
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if (err < 0) {
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break;
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}
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count += 1;
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}
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err => LFS_ERR_NOSPC;
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lfs_file_close(&lfs, &file) => 0;
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lfs_remove(&lfs, "exhaustion") => 0;
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lfs_remove(&lfs, "exhaustiondir") => 0;
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for (int i = 0; i < 10; i++) {
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sprintf(path, "dirwithanexhaustivelylongnameforpadding%d", i);
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lfs_remove(&lfs, path) => 0;
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}
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// see that chained dir fails
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lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
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for (int i = 0; i < count+1; i++) {
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lfs_file_write(&lfs, &file, buffer, size) => size;
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}
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lfs_file_sync(&lfs, &file) => 0;
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for (int i = 0; i < 10; i++) {
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sprintf(path, "dirwithanexhaustivelylongnameforpadding%d", i);
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lfs_mkdir(&lfs, path) => 0;
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}
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lfs_mkdir(&lfs, "exhaustiondir") => LFS_ERR_NOSPC;
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// shorten file to try a second chained dir
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while (true) {
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err = lfs_mkdir(&lfs, "exhaustiondir");
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if (err != LFS_ERR_NOSPC) {
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break;
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}
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lfs_ssize_t filesize = lfs_file_size(&lfs, &file);
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filesize > 0 => true;
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lfs_file_truncate(&lfs, &file, filesize - size) => 0;
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lfs_file_sync(&lfs, &file) => 0;
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}
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err => 0;
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lfs_mkdir(&lfs, "exhaustiondir2") => LFS_ERR_NOSPC;
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lfs_file_close(&lfs, &file) => 0;
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lfs_unmount(&lfs) => 0;
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'''
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[[case]] # split dir test
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define.LFS_BLOCK_SIZE = 512
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define.LFS_BLOCK_COUNT = 1024
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if = 'LFS_BLOCK_SIZE == 512 and LFS_BLOCK_COUNT == 1024'
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code = '''
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lfs_format(&lfs, &cfg) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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// create one block hole for half a directory
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lfs_file_open(&lfs, &file, "bump", LFS_O_WRONLY | LFS_O_CREAT) => 0;
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for (lfs_size_t i = 0; i < cfg.block_size; i += 2) {
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memcpy(&buffer[i], "hi", 2);
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}
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lfs_file_write(&lfs, &file, buffer, cfg.block_size) => cfg.block_size;
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lfs_file_close(&lfs, &file) => 0;
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lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
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size = strlen("blahblahblahblah");
|
|
memcpy(buffer, "blahblahblahblah", size);
|
|
for (lfs_size_t i = 0;
|
|
i < (cfg.block_count-4)*(cfg.block_size-8);
|
|
i += size) {
|
|
lfs_file_write(&lfs, &file, buffer, size) => size;
|
|
}
|
|
lfs_file_close(&lfs, &file) => 0;
|
|
|
|
// remount to force reset of lookahead
|
|
lfs_unmount(&lfs) => 0;
|
|
lfs_mount(&lfs, &cfg) => 0;
|
|
|
|
// open hole
|
|
lfs_remove(&lfs, "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) {
|
|
memcpy(&buffer[i], "hi", 2);
|
|
}
|
|
lfs_file_write(&lfs, &file, buffer, 2*cfg.block_size) => LFS_ERR_NOSPC;
|
|
lfs_file_close(&lfs, &file) => 0;
|
|
|
|
lfs_unmount(&lfs) => 0;
|
|
'''
|
|
|
|
[[case]] # outdated lookahead test
|
|
define.LFS_BLOCK_SIZE = 512
|
|
define.LFS_BLOCK_COUNT = 1024
|
|
if = 'LFS_BLOCK_SIZE == 512 and LFS_BLOCK_COUNT == 1024'
|
|
code = '''
|
|
lfs_format(&lfs, &cfg) => 0;
|
|
lfs_mount(&lfs, &cfg) => 0;
|
|
|
|
// fill completely with two files
|
|
lfs_file_open(&lfs, &file, "exhaustion1",
|
|
LFS_O_WRONLY | LFS_O_CREAT) => 0;
|
|
size = strlen("blahblahblahblah");
|
|
memcpy(buffer, "blahblahblahblah", size);
|
|
for (lfs_size_t i = 0;
|
|
i < ((cfg.block_count-2)/2)*(cfg.block_size-8);
|
|
i += size) {
|
|
lfs_file_write(&lfs, &file, buffer, size) => size;
|
|
}
|
|
lfs_file_close(&lfs, &file) => 0;
|
|
|
|
lfs_file_open(&lfs, &file, "exhaustion2",
|
|
LFS_O_WRONLY | LFS_O_CREAT) => 0;
|
|
size = strlen("blahblahblahblah");
|
|
memcpy(buffer, "blahblahblahblah", size);
|
|
for (lfs_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;
|
|
}
|
|
lfs_file_close(&lfs, &file) => 0;
|
|
|
|
// remount to force reset of lookahead
|
|
lfs_unmount(&lfs) => 0;
|
|
lfs_mount(&lfs, &cfg) => 0;
|
|
|
|
// rewrite one file
|
|
lfs_file_open(&lfs, &file, "exhaustion1",
|
|
LFS_O_WRONLY | LFS_O_TRUNC) => 0;
|
|
lfs_file_sync(&lfs, &file) => 0;
|
|
size = strlen("blahblahblahblah");
|
|
memcpy(buffer, "blahblahblahblah", size);
|
|
for (lfs_size_t i = 0;
|
|
i < ((cfg.block_count-2)/2)*(cfg.block_size-8);
|
|
i += size) {
|
|
lfs_file_write(&lfs, &file, buffer, size) => size;
|
|
}
|
|
lfs_file_close(&lfs, &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;
|
|
size = strlen("blahblahblahblah");
|
|
memcpy(buffer, "blahblahblahblah", size);
|
|
for (lfs_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;
|
|
}
|
|
lfs_file_close(&lfs, &file) => 0;
|
|
|
|
lfs_unmount(&lfs) => 0;
|
|
'''
|
|
|
|
[[case]] # outdated lookahead and split dir test
|
|
define.LFS_BLOCK_SIZE = 512
|
|
define.LFS_BLOCK_COUNT = 1024
|
|
if = 'LFS_BLOCK_SIZE == 512 and LFS_BLOCK_COUNT == 1024'
|
|
code = '''
|
|
lfs_format(&lfs, &cfg) => 0;
|
|
lfs_mount(&lfs, &cfg) => 0;
|
|
|
|
// fill completely with two files
|
|
lfs_file_open(&lfs, &file, "exhaustion1",
|
|
LFS_O_WRONLY | LFS_O_CREAT) => 0;
|
|
size = strlen("blahblahblahblah");
|
|
memcpy(buffer, "blahblahblahblah", size);
|
|
for (lfs_size_t i = 0;
|
|
i < ((cfg.block_count-2)/2)*(cfg.block_size-8);
|
|
i += size) {
|
|
lfs_file_write(&lfs, &file, buffer, size) => size;
|
|
}
|
|
lfs_file_close(&lfs, &file) => 0;
|
|
|
|
lfs_file_open(&lfs, &file, "exhaustion2",
|
|
LFS_O_WRONLY | LFS_O_CREAT) => 0;
|
|
size = strlen("blahblahblahblah");
|
|
memcpy(buffer, "blahblahblahblah", size);
|
|
for (lfs_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;
|
|
}
|
|
lfs_file_close(&lfs, &file) => 0;
|
|
|
|
// remount to force reset of lookahead
|
|
lfs_unmount(&lfs) => 0;
|
|
lfs_mount(&lfs, &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;
|
|
size = strlen("blahblahblahblah");
|
|
memcpy(buffer, "blahblahblahblah", size);
|
|
for (lfs_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;
|
|
}
|
|
lfs_file_close(&lfs, &file) => 0;
|
|
|
|
// try to allocate a directory, should fail!
|
|
lfs_mkdir(&lfs, "split") => LFS_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;
|
|
|
|
lfs_unmount(&lfs) => 0;
|
|
'''
|