Christopher Haster
c7820e653e
LFS_O_SNAPSHOT brings back some of littlefs's idiosyncratic behavior removed in the changes to open file syncing in a form that may be more useful for users. LFS_O_SNAPSHOT allows you to open a "snapshot" of a file. This is a cheap, local copy of a file who's changes are not reflected on disk. Internally, snapshot files use the same mechanism as pending writes. A separate, copy-on-write CTZ skip-list is created, with read-only references to the existing data blocks until a write occurs. The difference is that snapshot files are not enrolled in the mlist, meaning they won't get updates from open file syncs, and during close their contents are simply discarded. As an extra benefit, LFS_O_CREAT | LFS_O_SNAPSHOT is equivalent to Linux's O_TMPFILE, making it easy to create temporary, unnamed files. This may be useful for embedded development, where unnamed flash-backed buffers may provide a slower, but larger, alternative to RAM-backed buffers.
937 lines
31 KiB
TOML
937 lines
31 KiB
TOML
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[[case]] # interspersed file test
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define.SIZE = [10, 100]
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define.FILES = [4, 10, 26]
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code = '''
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lfs_file_t files[FILES];
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const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
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lfs_format(&lfs, &cfg) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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for (int j = 0; j < FILES; j++) {
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sprintf(path, "%c", alphas[j]);
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lfs_file_open(&lfs, &files[j], path,
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LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
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}
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for (int i = 0; i < SIZE; i++) {
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for (int j = 0; j < FILES; j++) {
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lfs_file_write(&lfs, &files[j], &alphas[j], 1) => 1;
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}
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}
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for (int j = 0; j < FILES; j++) {
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lfs_file_close(&lfs, &files[j]);
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}
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lfs_dir_open(&lfs, &dir, "/") => 0;
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lfs_dir_read(&lfs, &dir, &info) => 1;
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assert(strcmp(info.name, ".") == 0);
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assert(info.type == LFS_TYPE_DIR);
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lfs_dir_read(&lfs, &dir, &info) => 1;
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assert(strcmp(info.name, "..") == 0);
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assert(info.type == LFS_TYPE_DIR);
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for (int j = 0; j < FILES; j++) {
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sprintf(path, "%c", alphas[j]);
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lfs_dir_read(&lfs, &dir, &info) => 1;
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assert(strcmp(info.name, path) == 0);
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assert(info.type == LFS_TYPE_REG);
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assert(info.size == SIZE);
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}
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lfs_dir_read(&lfs, &dir, &info) => 0;
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lfs_dir_close(&lfs, &dir) => 0;
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for (int j = 0; j < FILES; j++) {
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sprintf(path, "%c", alphas[j]);
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lfs_file_open(&lfs, &files[j], path, LFS_O_RDONLY) => 0;
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}
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for (int i = 0; i < 10; i++) {
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for (int j = 0; j < FILES; j++) {
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lfs_file_read(&lfs, &files[j], buffer, 1) => 1;
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assert(buffer[0] == alphas[j]);
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}
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}
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for (int j = 0; j < FILES; j++) {
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lfs_file_close(&lfs, &files[j]);
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}
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lfs_unmount(&lfs) => 0;
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'''
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[[case]] # interspersed remove file test
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define.SIZE = [10, 100]
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define.FILES = [4, 10, 26]
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code = '''
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const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
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lfs_format(&lfs, &cfg) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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for (int j = 0; j < FILES; j++) {
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sprintf(path, "%c", alphas[j]);
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lfs_file_open(&lfs, &file, path,
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LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
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for (int i = 0; i < SIZE; i++) {
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lfs_file_write(&lfs, &file, &alphas[j], 1) => 1;
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}
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lfs_file_close(&lfs, &file);
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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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lfs_file_open(&lfs, &file, "zzz", LFS_O_WRONLY | LFS_O_CREAT) => 0;
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for (int j = 0; j < FILES; j++) {
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lfs_file_write(&lfs, &file, (const void*)"~", 1) => 1;
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lfs_file_sync(&lfs, &file) => 0;
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sprintf(path, "%c", alphas[j]);
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lfs_remove(&lfs, path) => 0;
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}
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lfs_file_close(&lfs, &file);
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lfs_dir_open(&lfs, &dir, "/") => 0;
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lfs_dir_read(&lfs, &dir, &info) => 1;
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assert(strcmp(info.name, ".") == 0);
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assert(info.type == LFS_TYPE_DIR);
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lfs_dir_read(&lfs, &dir, &info) => 1;
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assert(strcmp(info.name, "..") == 0);
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assert(info.type == LFS_TYPE_DIR);
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lfs_dir_read(&lfs, &dir, &info) => 1;
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assert(strcmp(info.name, "zzz") == 0);
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assert(info.type == LFS_TYPE_REG);
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assert(info.size == FILES);
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lfs_dir_read(&lfs, &dir, &info) => 0;
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lfs_dir_close(&lfs, &dir) => 0;
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lfs_file_open(&lfs, &file, "zzz", LFS_O_RDONLY) => 0;
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for (int i = 0; i < FILES; i++) {
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lfs_file_read(&lfs, &file, buffer, 1) => 1;
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assert(buffer[0] == '~');
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}
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lfs_file_close(&lfs, &file);
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lfs_unmount(&lfs) => 0;
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'''
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[[case]] # remove inconveniently test
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define.SIZE = [10, 100]
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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_t files[3];
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lfs_file_open(&lfs, &files[0], "e", LFS_O_WRONLY | LFS_O_CREAT) => 0;
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lfs_file_open(&lfs, &files[1], "f", LFS_O_WRONLY | LFS_O_CREAT) => 0;
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lfs_file_open(&lfs, &files[2], "g", LFS_O_WRONLY | LFS_O_CREAT) => 0;
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for (int i = 0; i < SIZE/2; i++) {
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lfs_file_write(&lfs, &files[0], (const void*)"e", 1) => 1;
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lfs_file_write(&lfs, &files[1], (const void*)"f", 1) => 1;
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lfs_file_write(&lfs, &files[2], (const void*)"g", 1) => 1;
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}
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lfs_remove(&lfs, "f") => 0;
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for (int i = 0; i < SIZE/2; i++) {
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lfs_file_write(&lfs, &files[0], (const void*)"e", 1) => 1;
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lfs_file_write(&lfs, &files[1], (const void*)"f", 1) => 1;
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lfs_file_write(&lfs, &files[2], (const void*)"g", 1) => 1;
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}
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lfs_file_close(&lfs, &files[0]);
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lfs_file_close(&lfs, &files[1]);
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lfs_file_close(&lfs, &files[2]);
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lfs_dir_open(&lfs, &dir, "/") => 0;
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lfs_dir_read(&lfs, &dir, &info) => 1;
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assert(strcmp(info.name, ".") == 0);
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assert(info.type == LFS_TYPE_DIR);
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lfs_dir_read(&lfs, &dir, &info) => 1;
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assert(strcmp(info.name, "..") == 0);
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assert(info.type == LFS_TYPE_DIR);
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lfs_dir_read(&lfs, &dir, &info) => 1;
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assert(strcmp(info.name, "e") == 0);
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assert(info.type == LFS_TYPE_REG);
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assert(info.size == SIZE);
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lfs_dir_read(&lfs, &dir, &info) => 1;
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assert(strcmp(info.name, "g") == 0);
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assert(info.type == LFS_TYPE_REG);
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assert(info.size == SIZE);
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lfs_dir_read(&lfs, &dir, &info) => 0;
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lfs_dir_close(&lfs, &dir) => 0;
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lfs_file_open(&lfs, &files[0], "e", LFS_O_RDONLY) => 0;
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lfs_file_open(&lfs, &files[1], "g", LFS_O_RDONLY) => 0;
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for (int i = 0; i < SIZE; i++) {
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lfs_file_read(&lfs, &files[0], buffer, 1) => 1;
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assert(buffer[0] == 'e');
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lfs_file_read(&lfs, &files[1], buffer, 1) => 1;
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assert(buffer[0] == 'g');
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}
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lfs_file_close(&lfs, &files[0]);
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lfs_file_close(&lfs, &files[1]);
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lfs_unmount(&lfs) => 0;
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'''
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[[case]] # reentrant interspersed file test
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define.SIZE = [10, 100]
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define.FILES = [4, 10, 26]
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reentrant = true
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code = '''
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lfs_file_t files[FILES];
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const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
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err = lfs_mount(&lfs, &cfg);
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if (err) {
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lfs_format(&lfs, &cfg) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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}
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for (int j = 0; j < FILES; j++) {
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sprintf(path, "%c", alphas[j]);
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lfs_file_open(&lfs, &files[j], 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 i = 0; i < SIZE; i++) {
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for (int j = 0; j < FILES; j++) {
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size = lfs_file_size(&lfs, &files[j]);
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assert((int)size >= 0);
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if ((int)size <= i) {
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lfs_file_write(&lfs, &files[j], &alphas[j], 1) => 1;
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lfs_file_sync(&lfs, &files[j]) => 0;
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}
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}
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}
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for (int j = 0; j < FILES; j++) {
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lfs_file_close(&lfs, &files[j]);
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}
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lfs_dir_open(&lfs, &dir, "/") => 0;
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lfs_dir_read(&lfs, &dir, &info) => 1;
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assert(strcmp(info.name, ".") == 0);
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assert(info.type == LFS_TYPE_DIR);
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lfs_dir_read(&lfs, &dir, &info) => 1;
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assert(strcmp(info.name, "..") == 0);
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assert(info.type == LFS_TYPE_DIR);
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for (int j = 0; j < FILES; j++) {
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sprintf(path, "%c", alphas[j]);
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lfs_dir_read(&lfs, &dir, &info) => 1;
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assert(strcmp(info.name, path) == 0);
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assert(info.type == LFS_TYPE_REG);
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assert(info.size == SIZE);
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}
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lfs_dir_read(&lfs, &dir, &info) => 0;
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lfs_dir_close(&lfs, &dir) => 0;
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for (int j = 0; j < FILES; j++) {
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sprintf(path, "%c", alphas[j]);
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lfs_file_open(&lfs, &files[j], path, LFS_O_RDONLY) => 0;
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}
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for (int i = 0; i < 10; i++) {
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for (int j = 0; j < FILES; j++) {
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lfs_file_read(&lfs, &files[j], buffer, 1) => 1;
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assert(buffer[0] == alphas[j]);
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}
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}
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for (int j = 0; j < FILES; j++) {
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lfs_file_close(&lfs, &files[j]);
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}
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lfs_unmount(&lfs) => 0;
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'''
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[[case]] # open same file reading from separate file handles
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define.READERS = 3
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define.SIZE = [10, 100, 1000, 10000]
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define.RDMODE = ['LFS_O_RDONLY', 'LFS_O_RDWR']
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code = '''
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const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
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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, "shared", LFS_O_CREAT | LFS_O_WRONLY) => 0;
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for (int j = 0; j < SIZE; j++) {
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lfs_file_write(&lfs, &file, &alphas[j % 26], 1) => 1;
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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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// open all files
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lfs_mount(&lfs, &cfg) => 0;
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lfs_file_t readers[READERS];
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for (int i = 0; i < READERS; i++) {
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lfs_file_open(&lfs, &readers[i], "shared", RDMODE) => 0;
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}
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// perform operations while all readers are open
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for (int i = 0; i < READERS; i++) {
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for (int j = 0; j < SIZE; j++) {
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lfs_file_read(&lfs, &readers[i], buffer, 1) => 1;
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assert(buffer[0] == alphas[j % 26]);
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}
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}
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for (int i = 0; i < READERS; i++) {
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lfs_file_close(&lfs, &readers[i]) => 0;
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}
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lfs_unmount(&lfs) => 0;
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'''
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[[case]] # open same file reading and writing from separate file handles
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define.READERS = 3
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define.SIZE = [10, 100, 1000, 10000]
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define.RDMODE = ['LFS_O_RDONLY', 'LFS_O_RDWR']
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define.WRMODE = ['LFS_O_WRONLY', 'LFS_O_RDWR']
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code = '''
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const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
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const char nums[] = "0123456789";
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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, "shared", LFS_O_CREAT | LFS_O_WRONLY) => 0;
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for (int j = 0; j < SIZE; j++) {
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lfs_file_write(&lfs, &file, &alphas[j % 26], 1) => 1;
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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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// open all files
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lfs_mount(&lfs, &cfg) => 0;
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lfs_file_t writer;
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lfs_file_t readers[READERS];
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lfs_file_open(&lfs, &writer, "shared", WRMODE) => 0;
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for (int i = 0; i < READERS; i++) {
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lfs_file_open(&lfs, &readers[i], "shared", RDMODE) => 0;
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}
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// perform operations while all readers are open
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for (int j = 0; j < SIZE; j++) {
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lfs_file_write(&lfs, &writer, &nums[j % 10], 1) => 1;
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}
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for (int i = 0; i < READERS; i++) {
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for (int j = 0; j < SIZE/2; j++) {
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lfs_file_read(&lfs, &readers[i], buffer, 1) => 1;
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assert(buffer[0] == alphas[j % 26]);
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}
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}
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// sync, now write should reflect in all open files
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lfs_file_sync(&lfs, &writer) => 0;
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for (int i = 0; i < READERS; i++) {
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for (int j = SIZE/2; j < SIZE; j++) {
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lfs_file_read(&lfs, &readers[i], buffer, 1) => 1;
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assert(buffer[0] == nums[j % 10]);
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}
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}
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// double check our writer reflects its own changes
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if (WRMODE == LFS_O_RDWR) {
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lfs_file_rewind(&lfs, &writer) => 0;
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for (int j = 0; j < SIZE; j++) {
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lfs_file_read(&lfs, &writer, buffer, 1) => 1;
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assert(buffer[0] == nums[j % 10]);
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}
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}
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for (int i = 0; i < READERS; i++) {
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lfs_file_close(&lfs, &readers[i]) => 0;
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}
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lfs_unmount(&lfs) => 0;
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'''
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[[case]] # check that attributes are updated in open files
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define.READERS = 3
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define.SIZE = 10
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define.RDMODE = ['LFS_O_RDONLY', 'LFS_O_RDWR']
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define.WRMODE = ['LFS_O_WRONLY', 'LFS_O_RDWR']
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code = '''
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const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
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const char nums[] = "0123456789";
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lfs_format(&lfs, &cfg) => 0;
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lfs_mount(&lfs, &cfg) => 0;
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const struct lfs_file_config filecfg = {
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.attr_count = 3,
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.attrs = (struct lfs_attr[]){
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{'A', "a", 1},
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{'B', "bb", 2},
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{'C', "ccc", 3},
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},
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};
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lfs_file_opencfg(&lfs, &file, "shared",
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LFS_O_CREAT | LFS_O_WRONLY, &filecfg) => 0;
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for (int j = 0; j < SIZE; j++) {
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lfs_file_write(&lfs, &file, &alphas[j % 26], 1) => 1;
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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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// open all files
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lfs_mount(&lfs, &cfg) => 0;
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lfs_file_t writer;
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const struct lfs_file_config writercfg = {
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.attr_count = 3,
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.attrs = (struct lfs_attr[]){
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{'A', &(uint8_t[1]){0}, 1},
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{'B', &(uint8_t[2]){0}, 2},
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{'C', &(uint8_t[3]){0}, 3}}};
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lfs_file_t readers[READERS];
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const struct lfs_file_config readercfgs[READERS] = {
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{ .attr_count = 3,
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.attrs = (struct lfs_attr[]){
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{'A', &(uint8_t[1]){0}, 1},
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{'B', &(uint8_t[2]){0}, 2},
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{'C', &(uint8_t[3]){0}, 3}}},
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{ .attr_count = 3,
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.attrs = (struct lfs_attr[]){
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{'A', &(uint8_t[1]){0}, 1},
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{'B', &(uint8_t[2]){0}, 2},
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{'C', &(uint8_t[3]){0}, 3}}},
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{ .attr_count = 3,
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.attrs = (struct lfs_attr[]){
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{'A', &(uint8_t[1]){0}, 1},
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{'B', &(uint8_t[2]){0}, 2},
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{'C', &(uint8_t[3]){0}, 3}}}};
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lfs_file_opencfg(&lfs, &writer, "shared",
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WRMODE, &writercfg) => 0;
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for (int i = 0; i < READERS; i++) {
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lfs_file_opencfg(&lfs, &readers[i], "shared",
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RDMODE, &readercfgs[i]) => 0;
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}
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// perform operations while all readers are open
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writercfg.attrs[0].size = 1;
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memcpy(writercfg.attrs[0].buffer, "0", 1);
|
|
writercfg.attrs[1].size = 2;
|
|
memcpy(writercfg.attrs[1].buffer, "11", 2);
|
|
writercfg.attrs[2].size = 3;
|
|
memcpy(writercfg.attrs[2].buffer, "222", 3);
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_write(&lfs, &writer, &nums[j % 10], 1) => 1;
|
|
}
|
|
|
|
for (int i = 0; i < READERS; i++) {
|
|
assert(readercfgs[i].attrs[0].size == 1);
|
|
assert(memcmp(readercfgs[i].attrs[0].buffer, "a", 1) == 0);
|
|
assert(readercfgs[i].attrs[1].size == 2);
|
|
assert(memcmp(readercfgs[i].attrs[1].buffer, "bb", 2) == 0);
|
|
assert(readercfgs[i].attrs[2].size == 3);
|
|
assert(memcmp(readercfgs[i].attrs[2].buffer, "ccc", 3) == 0);
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &readers[i], buffer, 1) => 1;
|
|
assert(buffer[0] == alphas[j % 26]);
|
|
}
|
|
}
|
|
|
|
// sync, now write should reflect in all open files
|
|
lfs_file_sync(&lfs, &writer) => 0;
|
|
|
|
for (int i = 0; i < READERS; i++) {
|
|
assert(readercfgs[i].attrs[0].size == 1);
|
|
assert(memcmp(readercfgs[i].attrs[0].buffer, "0", 1) == 0);
|
|
assert(readercfgs[i].attrs[1].size == 2);
|
|
assert(memcmp(readercfgs[i].attrs[1].buffer, "11", 2) == 0);
|
|
assert(readercfgs[i].attrs[2].size == 3);
|
|
assert(memcmp(readercfgs[i].attrs[2].buffer, "222", 3) == 0);
|
|
lfs_file_rewind(&lfs, &readers[i]) => 0;
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &readers[i], buffer, 1) => 1;
|
|
assert(buffer[0] == nums[j % 10]);
|
|
}
|
|
}
|
|
|
|
// double check our writer reflects its own changes
|
|
if (WRMODE == LFS_O_RDWR) {
|
|
assert(writercfg.attrs[0].size == 1);
|
|
assert(memcmp(writercfg.attrs[0].buffer, "0", 1) == 0);
|
|
assert(writercfg.attrs[1].size == 2);
|
|
assert(memcmp(writercfg.attrs[1].buffer, "11", 2) == 0);
|
|
assert(writercfg.attrs[2].size == 3);
|
|
assert(memcmp(writercfg.attrs[2].buffer, "222", 3) == 0);
|
|
lfs_file_rewind(&lfs, &writer) => 0;
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &writer, buffer, 1) => 1;
|
|
assert(buffer[0] == nums[j % 10]);
|
|
}
|
|
}
|
|
|
|
// now try explicit lfs_setattr calls, this should still update open files
|
|
lfs_setattr(&lfs, "shared", 'A', "A", 1) => 0;
|
|
lfs_setattr(&lfs, "shared", 'B', "BB", 2) => 0;
|
|
lfs_setattr(&lfs, "shared", 'C', "CCC", 3) => 0;
|
|
|
|
for (int i = 0; i < READERS; i++) {
|
|
assert(readercfgs[i].attrs[0].size == 1);
|
|
assert(memcmp(readercfgs[i].attrs[0].buffer, "A", 1) == 0);
|
|
assert(readercfgs[i].attrs[1].size == 2);
|
|
assert(memcmp(readercfgs[i].attrs[1].buffer, "BB", 2) == 0);
|
|
assert(readercfgs[i].attrs[2].size == 3);
|
|
assert(memcmp(readercfgs[i].attrs[2].buffer, "CCC", 3) == 0);
|
|
lfs_file_rewind(&lfs, &readers[i]) => 0;
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &readers[i], buffer, 1) => 1;
|
|
assert(buffer[0] == nums[j % 10]);
|
|
}
|
|
}
|
|
|
|
if (WRMODE == LFS_O_RDWR) {
|
|
assert(writercfg.attrs[0].size == 1);
|
|
assert(memcmp(writercfg.attrs[0].buffer, "A", 1) == 0);
|
|
assert(writercfg.attrs[1].size == 2);
|
|
assert(memcmp(writercfg.attrs[1].buffer, "BB", 2) == 0);
|
|
assert(writercfg.attrs[2].size == 3);
|
|
assert(memcmp(writercfg.attrs[2].buffer, "CCC", 3) == 0);
|
|
lfs_file_rewind(&lfs, &writer) => 0;
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &writer, buffer, 1) => 1;
|
|
assert(buffer[0] == nums[j % 10]);
|
|
}
|
|
} else if (WRMODE == LFS_O_WRONLY) {
|
|
// this should NOT update wronly attributes, these may be
|
|
// stored in read-only memory
|
|
assert(writercfg.attrs[0].size == 1);
|
|
assert(memcmp(writercfg.attrs[0].buffer, "0", 1) == 0);
|
|
assert(writercfg.attrs[1].size == 2);
|
|
assert(memcmp(writercfg.attrs[1].buffer, "11", 2) == 0);
|
|
assert(writercfg.attrs[2].size == 3);
|
|
assert(memcmp(writercfg.attrs[2].buffer, "222", 3) == 0);
|
|
}
|
|
|
|
for (int i = 0; i < READERS; i++) {
|
|
lfs_file_close(&lfs, &readers[i]) => 0;
|
|
}
|
|
lfs_unmount(&lfs) => 0;
|
|
'''
|
|
|
|
[[case]] # simple snapshot for reading
|
|
define.SIZE = [10, 100, 1000, 10000]
|
|
code = '''
|
|
const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
|
|
const char nums[] = "0123456789";
|
|
lfs_format(&lfs, &cfg) => 0;
|
|
lfs_mount(&lfs, &cfg) => 0;
|
|
const struct lfs_file_config filecfg = {
|
|
.attr_count = 1,
|
|
.attrs = (struct lfs_attr[]){
|
|
{'A', "abcd", 4},
|
|
},
|
|
};
|
|
lfs_file_opencfg(&lfs, &file, "open_me",
|
|
LFS_O_CREAT | LFS_O_WRONLY, &filecfg) => 0;
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_write(&lfs, &file, &alphas[j % 26], 1) => 1;
|
|
}
|
|
lfs_file_close(&lfs, &file) => 0;
|
|
lfs_unmount(&lfs) => 0;
|
|
|
|
// open reader/writer/snapshot
|
|
lfs_mount(&lfs, &cfg) => 0;
|
|
lfs_file_t reader;
|
|
const struct lfs_file_config readercfg = {
|
|
.attr_count = 1,
|
|
.attrs = (struct lfs_attr[]){
|
|
{'A', &(uint8_t[4]){0}, 4}
|
|
},
|
|
};
|
|
lfs_file_t writer;
|
|
const struct lfs_file_config writercfg = {
|
|
.attr_count = 1,
|
|
.attrs = (struct lfs_attr[]){
|
|
{'A', &(uint8_t[4]){0}, 4}
|
|
},
|
|
};
|
|
lfs_file_t snapshot;
|
|
const struct lfs_file_config snapshotcfg = {
|
|
.attr_count = 1,
|
|
.attrs = (struct lfs_attr[]){
|
|
{'A', &(uint8_t[4]){0}, 4}
|
|
},
|
|
};
|
|
lfs_file_opencfg(&lfs, &reader, "open_me",
|
|
LFS_O_RDONLY, &readercfg) => 0;
|
|
lfs_file_opencfg(&lfs, &writer, "open_me",
|
|
LFS_O_WRONLY, &writercfg) => 0;
|
|
lfs_file_opencfg(&lfs, &snapshot, "open_me",
|
|
LFS_O_RDONLY | LFS_O_SNAPSHOT, &snapshotcfg) => 0;
|
|
|
|
assert(memcmp(readercfg.attrs[0].buffer, "abcd", 4) == 0);
|
|
for (int j = 0; j < SIZE/2; j++) {
|
|
lfs_file_read(&lfs, &reader, buffer, 1) => 1;
|
|
assert(buffer[0] == alphas[j % 26]);
|
|
}
|
|
|
|
assert(memcmp(snapshotcfg.attrs[0].buffer, "abcd", 4) == 0);
|
|
for (int j = 0; j < SIZE/2; j++) {
|
|
lfs_file_read(&lfs, &snapshot, buffer, 1) => 1;
|
|
assert(buffer[0] == alphas[j % 26]);
|
|
}
|
|
|
|
// write file
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_write(&lfs, &writer, &nums[j % 10], 1) => 1;
|
|
}
|
|
memcpy(writercfg.attrs[0].buffer, "0123", 4);
|
|
lfs_file_sync(&lfs, &writer) => 0;
|
|
|
|
// reader should change
|
|
assert(memcmp(readercfg.attrs[0].buffer, "0123", 4) == 0);
|
|
for (int j = SIZE/2; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &reader, buffer, 1) => 1;
|
|
assert(buffer[0] == nums[j % 10]);
|
|
}
|
|
|
|
// snapshot should remain unchanged
|
|
assert(memcmp(snapshotcfg.attrs[0].buffer, "abcd", 4) == 0);
|
|
for (int j = SIZE/2; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &snapshot, buffer, 1) => 1;
|
|
assert(buffer[0] == alphas[j % 26]);
|
|
}
|
|
|
|
lfs_file_close(&lfs, &reader) => 0;
|
|
lfs_file_close(&lfs, &writer) => 0;
|
|
lfs_file_close(&lfs, &snapshot) => 0;
|
|
|
|
// disk should change
|
|
lfs_file_opencfg(&lfs, &reader, "open_me",
|
|
LFS_O_RDONLY, &readercfg) => 0;
|
|
assert(memcmp(readercfg.attrs[0].buffer, "0123", 4) == 0);
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &reader, buffer, 1) => 1;
|
|
assert(buffer[0] == nums[j % 10]);
|
|
}
|
|
lfs_file_close(&lfs, &reader) => 0;
|
|
lfs_unmount(&lfs) => 0;
|
|
|
|
lfs_mount(&lfs, &cfg) => 0;
|
|
lfs_file_opencfg(&lfs, &reader, "open_me",
|
|
LFS_O_RDONLY, &readercfg) => 0;
|
|
assert(memcmp(readercfg.attrs[0].buffer, "0123", 4) == 0);
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &reader, buffer, 1) => 1;
|
|
assert(buffer[0] == nums[j % 10]);
|
|
}
|
|
lfs_file_close(&lfs, &reader) => 0;
|
|
lfs_unmount(&lfs) => 0;
|
|
'''
|
|
|
|
[[case]] # simple snapshot for writing
|
|
define.SIZE = [10, 100, 1000, 10000]
|
|
code = '''
|
|
const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
|
|
const char nums[] = "0123456789";
|
|
lfs_format(&lfs, &cfg) => 0;
|
|
lfs_mount(&lfs, &cfg) => 0;
|
|
const struct lfs_file_config filecfg = {
|
|
.attr_count = 1,
|
|
.attrs = (struct lfs_attr[]){
|
|
{'A', "abcd", 4},
|
|
},
|
|
};
|
|
lfs_file_opencfg(&lfs, &file, "open_me",
|
|
LFS_O_CREAT | LFS_O_WRONLY, &filecfg) => 0;
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_write(&lfs, &file, &alphas[j % 26], 1) => 1;
|
|
}
|
|
lfs_file_close(&lfs, &file) => 0;
|
|
lfs_unmount(&lfs) => 0;
|
|
|
|
// open reader/snapshot
|
|
lfs_mount(&lfs, &cfg) => 0;
|
|
lfs_file_t reader;
|
|
const struct lfs_file_config readercfg = {
|
|
.attr_count = 1,
|
|
.attrs = (struct lfs_attr[]){
|
|
{'A', &(uint8_t[4]){0}, 4}
|
|
},
|
|
};
|
|
lfs_file_t snapshot;
|
|
const struct lfs_file_config snapshotcfg = {
|
|
.attr_count = 1,
|
|
.attrs = (struct lfs_attr[]){
|
|
{'A', &(uint8_t[4]){0}, 4}
|
|
},
|
|
};
|
|
lfs_file_opencfg(&lfs, &reader, "open_me",
|
|
LFS_O_RDONLY, &readercfg) => 0;
|
|
lfs_file_opencfg(&lfs, &snapshot, "open_me",
|
|
LFS_O_RDWR | LFS_O_SNAPSHOT, &snapshotcfg) => 0;
|
|
|
|
assert(memcmp(readercfg.attrs[0].buffer, "abcd", 4) == 0);
|
|
for (int j = 0; j < SIZE/2; j++) {
|
|
lfs_file_read(&lfs, &reader, buffer, 1) => 1;
|
|
assert(buffer[0] == alphas[j % 26]);
|
|
}
|
|
|
|
assert(memcmp(snapshotcfg.attrs[0].buffer, "abcd", 4) == 0);
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &snapshot, buffer, 1) => 1;
|
|
assert(buffer[0] == alphas[j % 26]);
|
|
}
|
|
|
|
// modify snapshot
|
|
lfs_file_rewind(&lfs, &snapshot) => 0;
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_write(&lfs, &snapshot, &nums[j % 10], 1) => 1;
|
|
}
|
|
memcpy(snapshotcfg.attrs[0].buffer, "0123", 4);
|
|
|
|
lfs_file_rewind(&lfs, &snapshot) => 0;
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &snapshot, buffer, 1) => 1;
|
|
assert(buffer[0] == nums[j % 10]);
|
|
}
|
|
|
|
lfs_file_sync(&lfs, &snapshot) => 0;
|
|
|
|
// reader should not change
|
|
assert(memcmp(readercfg.attrs[0].buffer, "abcd", 4) == 0);
|
|
for (int j = SIZE/2; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &reader, buffer, 1) => 1;
|
|
assert(buffer[0] == alphas[j % 26]);
|
|
}
|
|
|
|
// snapshot should changed
|
|
assert(memcmp(snapshotcfg.attrs[0].buffer, "0123", 4) == 0);
|
|
lfs_file_rewind(&lfs, &snapshot) => 0;
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &snapshot, buffer, 1) => 1;
|
|
assert(buffer[0] == nums[j % 10]);
|
|
}
|
|
|
|
lfs_file_close(&lfs, &reader) => 0;
|
|
lfs_file_close(&lfs, &snapshot) => 0;
|
|
|
|
// disk should not change
|
|
lfs_file_opencfg(&lfs, &reader, "open_me",
|
|
LFS_O_RDONLY, &readercfg) => 0;
|
|
assert(memcmp(readercfg.attrs[0].buffer, "abcd", 4) == 0);
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &reader, buffer, 1) => 1;
|
|
assert(buffer[0] == alphas[j % 26]);
|
|
}
|
|
lfs_file_close(&lfs, &reader) => 0;
|
|
lfs_unmount(&lfs) => 0;
|
|
|
|
lfs_mount(&lfs, &cfg) => 0;
|
|
lfs_file_opencfg(&lfs, &reader, "open_me",
|
|
LFS_O_RDONLY, &readercfg) => 0;
|
|
assert(memcmp(readercfg.attrs[0].buffer, "abcd", 4) == 0);
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &reader, buffer, 1) => 1;
|
|
assert(buffer[0] == alphas[j % 26]);
|
|
}
|
|
lfs_file_close(&lfs, &reader) => 0;
|
|
lfs_unmount(&lfs) => 0;
|
|
'''
|
|
|
|
[[case]] # temporary files
|
|
define.SIZE = [10, 100, 1000, 10000]
|
|
define.TMP_PATH = 'range(4)'
|
|
code = '''
|
|
const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
|
|
const char nums[] = "0123456789";
|
|
const char caps[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
|
|
lfs_format(&lfs, &cfg) => 0;
|
|
lfs_mount(&lfs, &cfg) => 0;
|
|
const struct lfs_file_config filecfg = {
|
|
.attr_count = 1,
|
|
.attrs = (struct lfs_attr[]){
|
|
{'A', "abcd", 4},
|
|
},
|
|
};
|
|
lfs_file_opencfg(&lfs, &file, "open_me",
|
|
LFS_O_CREAT | LFS_O_WRONLY, &filecfg) => 0;
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_write(&lfs, &file, &alphas[j % 26], 1) => 1;
|
|
}
|
|
lfs_file_close(&lfs, &file) => 0;
|
|
lfs_file_opencfg(&lfs, &file, "dont_open_me",
|
|
LFS_O_CREAT | LFS_O_WRONLY, &filecfg) => 0;
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_write(&lfs, &file, &alphas[j % 26], 1) => 1;
|
|
}
|
|
lfs_file_close(&lfs, &file) => 0;
|
|
lfs_unmount(&lfs) => 0;
|
|
|
|
// open reader/writer/temp
|
|
lfs_mount(&lfs, &cfg) => 0;
|
|
lfs_file_t reader;
|
|
const struct lfs_file_config readercfg = {
|
|
.attr_count = 1,
|
|
.attrs = (struct lfs_attr[]){
|
|
{'A', &(uint8_t[4]){0}, 4}
|
|
},
|
|
};
|
|
lfs_file_t writer;
|
|
const struct lfs_file_config writercfg = {
|
|
.attr_count = 1,
|
|
.attrs = (struct lfs_attr[]){
|
|
{'A', &(uint8_t[4]){0}, 4}
|
|
},
|
|
};
|
|
lfs_file_t tmp;
|
|
const struct lfs_file_config tmpcfg = {
|
|
.attr_count = 1,
|
|
.attrs = (struct lfs_attr[]){
|
|
{'A', &(uint8_t[4]){0}, 4}
|
|
},
|
|
};
|
|
lfs_file_opencfg(&lfs, &reader, "open_me",
|
|
LFS_O_RDONLY, &readercfg) => 0;
|
|
lfs_file_opencfg(&lfs, &writer, "open_me",
|
|
LFS_O_WRONLY, &writercfg) => 0;
|
|
const char *tmp_paths[] = {NULL, "/", "/tmp", "/open_me.tmp"};
|
|
lfs_file_opencfg(&lfs, &tmp, tmp_paths[TMP_PATH],
|
|
LFS_O_RDWR | LFS_O_CREAT | LFS_O_SNAPSHOT, &tmpcfg) => 0;
|
|
|
|
assert(memcmp(readercfg.attrs[0].buffer, "abcd", 4) == 0);
|
|
for (int j = 0; j < SIZE/3; j++) {
|
|
lfs_file_read(&lfs, &reader, buffer, 1) => 1;
|
|
assert(buffer[0] == alphas[j % 26]);
|
|
}
|
|
|
|
assert(memcmp(tmpcfg.attrs[0].buffer, "\0\0\0\0", 4) == 0);
|
|
assert(lfs_file_size(&lfs, &tmp) == 0);
|
|
|
|
// write to tmp
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_write(&lfs, &tmp, &nums[j % 10], 1) => 1;
|
|
}
|
|
memcpy(tmpcfg.attrs[0].buffer, "0123", 4);
|
|
|
|
lfs_file_rewind(&lfs, &tmp) => 0;
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &tmp, buffer, 1) => 1;
|
|
assert(buffer[0] == nums[j % 10]);
|
|
}
|
|
|
|
lfs_file_sync(&lfs, &tmp) => 0;
|
|
|
|
// reader should not change
|
|
assert(memcmp(readercfg.attrs[0].buffer, "abcd", 4) == 0);
|
|
for (int j = SIZE/3; j < 2*SIZE/3; j++) {
|
|
lfs_file_read(&lfs, &reader, buffer, 1) => 1;
|
|
assert(buffer[0] == alphas[j % 26]);
|
|
}
|
|
|
|
// tmp should change
|
|
assert(memcmp(tmpcfg.attrs[0].buffer, "0123", 4) == 0);
|
|
lfs_file_rewind(&lfs, &tmp) => 0;
|
|
for (int j = 0; j < SIZE/2; j++) {
|
|
lfs_file_read(&lfs, &tmp, buffer, 1) => 1;
|
|
assert(buffer[0] == nums[j % 10]);
|
|
}
|
|
|
|
// write to file
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_write(&lfs, &writer, &caps[j % 26], 1) => 1;
|
|
}
|
|
memcpy(writercfg.attrs[0].buffer, "ABCD", 4);
|
|
lfs_file_sync(&lfs, &writer) => 0;
|
|
|
|
// reader should change
|
|
assert(memcmp(readercfg.attrs[0].buffer, "ABCD", 4) == 0);
|
|
for (int j = 2*SIZE/3; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &reader, buffer, 1) => 1;
|
|
assert(buffer[0] == caps[j % 26]);
|
|
}
|
|
|
|
// tmp should not change
|
|
assert(memcmp(tmpcfg.attrs[0].buffer, "0123", 4) == 0);
|
|
for (int j = SIZE/2; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &tmp, buffer, 1) => 1;
|
|
assert(buffer[0] == nums[j % 10]);
|
|
}
|
|
|
|
lfs_file_close(&lfs, &reader) => 0;
|
|
lfs_file_close(&lfs, &writer) => 0;
|
|
lfs_file_close(&lfs, &tmp) => 0;
|
|
|
|
// tmp should not appear on disk
|
|
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_REG);
|
|
assert(strcmp(info.name, "dont_open_me") == 0);
|
|
lfs_dir_read(&lfs, &dir, &info) => 1;
|
|
assert(info.type == LFS_TYPE_REG);
|
|
assert(strcmp(info.name, "open_me") == 0);
|
|
lfs_dir_read(&lfs, &dir, &info) => 0;
|
|
lfs_dir_close(&lfs, &dir) => 0;
|
|
lfs_file_opencfg(&lfs, &reader, "open_me",
|
|
LFS_O_RDONLY, &readercfg) => 0;
|
|
assert(memcmp(readercfg.attrs[0].buffer, "ABCD", 4) == 0);
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &reader, buffer, 1) => 1;
|
|
assert(buffer[0] == caps[j % 26]);
|
|
}
|
|
lfs_file_close(&lfs, &reader) => 0;
|
|
lfs_file_opencfg(&lfs, &reader, "dont_open_me",
|
|
LFS_O_RDONLY, &readercfg) => 0;
|
|
assert(memcmp(readercfg.attrs[0].buffer, "abcd", 4) == 0);
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &reader, buffer, 1) => 1;
|
|
assert(buffer[0] == alphas[j % 26]);
|
|
}
|
|
lfs_file_close(&lfs, &reader) => 0;
|
|
lfs_unmount(&lfs) => 0;
|
|
|
|
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_REG);
|
|
assert(strcmp(info.name, "dont_open_me") == 0);
|
|
lfs_dir_read(&lfs, &dir, &info) => 1;
|
|
assert(info.type == LFS_TYPE_REG);
|
|
assert(strcmp(info.name, "open_me") == 0);
|
|
lfs_dir_read(&lfs, &dir, &info) => 0;
|
|
lfs_dir_close(&lfs, &dir) => 0;
|
|
lfs_file_opencfg(&lfs, &reader, "open_me",
|
|
LFS_O_RDONLY, &readercfg) => 0;
|
|
assert(memcmp(readercfg.attrs[0].buffer, "ABCD", 4) == 0);
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &reader, buffer, 1) => 1;
|
|
assert(buffer[0] == caps[j % 26]);
|
|
}
|
|
lfs_file_close(&lfs, &reader) => 0;
|
|
lfs_file_opencfg(&lfs, &reader, "dont_open_me",
|
|
LFS_O_RDONLY, &readercfg) => 0;
|
|
assert(memcmp(readercfg.attrs[0].buffer, "abcd", 4) == 0);
|
|
for (int j = 0; j < SIZE; j++) {
|
|
lfs_file_read(&lfs, &reader, buffer, 1) => 1;
|
|
assert(buffer[0] == alphas[j % 26]);
|
|
}
|
|
lfs_file_close(&lfs, &reader) => 0;
|
|
lfs_unmount(&lfs) => 0;
|
|
'''
|
|
|
|
[[case]] # test snapshot open errors
|
|
code = '''
|
|
lfs_format(&lfs, &cfg) => 0;
|
|
lfs_mount(&lfs, &cfg) => 0;
|
|
lfs_file_open(&lfs, &file, NULL,
|
|
LFS_O_RDWR | LFS_O_SNAPSHOT) => LFS_ERR_ISDIR;
|
|
lfs_file_open(&lfs, &file, "/",
|
|
LFS_O_RDWR | LFS_O_SNAPSHOT) => LFS_ERR_ISDIR;
|
|
lfs_file_open(&lfs, &file, "/tmp",
|
|
LFS_O_RDWR | LFS_O_SNAPSHOT) => LFS_ERR_NOENT;
|
|
lfs_file_open(&lfs, &file, "/tmp/",
|
|
LFS_O_RDWR | LFS_O_CREAT | LFS_O_SNAPSHOT) => LFS_ERR_NOENT;
|
|
lfs_file_open(&lfs, &file, "/tmp/tmp",
|
|
LFS_O_RDWR | LFS_O_CREAT | LFS_O_SNAPSHOT) => LFS_ERR_NOENT;
|
|
lfs_unmount(&lfs) => 0;
|
|
'''
|