Christopher Haster
eee0e6cfa1
Took the opportunity to make some allocator tweaks: - Renamed lfs.free -> lfs.lookahead, it's previous name did cause some confusion. - Renamed lfs.free.off -> lfs.lookahead.start - Renamed lfs.free.i -> lfs.lookahead.next - Renamed lfs.free.ack -> lfs.lookahead.acked - Changed bitmap from using 32-bit words to using 8-bit bytes, dropping the alignment requirement. One of the reasons for 32-bit alignment was an attempt at future proofing for some sort of free-list. This never landed, and if it did, it could have been provided without breaking backwards compatiblity via an additional config option, at a minor RAM cost. We never used ffs/clz instructions for this bitmap, so I don't think using 32-bit words offers much advantage. It just creates another potential issue for users if their lookahead buffer is unaligned. These changes should probably also be upstreamed to the current version. They don't depend on anything rbyd specific. Note, at some point lfs_alloc will need to be extended to mark block tags, etc, as in-use during traversal.
892 lines
27 KiB
TOML
892 lines
27 KiB
TOML
|
|
# Tests covering properties of the block allocator
|
|
|
|
# TODO test all of these with weird block sizes? would be nice to make this
|
|
# easy via the test_runner, either by handling it there or letting a single
|
|
# config limit the block count by a couple blocks
|
|
|
|
# test that we can alloc
|
|
[cases.test_alloc_blocks]
|
|
in = 'lfs.c'
|
|
code = '''
|
|
lfs_t lfs;
|
|
lfsr_format(&lfs, cfg) => 0;
|
|
lfsr_mount(&lfs, cfg) => 0;
|
|
|
|
// start allocating
|
|
lfs_alloc_ack(&lfs);
|
|
lfs_size_t alloced = 0;
|
|
while (true) {
|
|
lfs_block_t block;
|
|
int err = lfs_alloc(&lfs, &block);
|
|
assert(!err || err == LFS_ERR_NOSPC);
|
|
|
|
if (err == LFS_ERR_NOSPC) {
|
|
break;
|
|
}
|
|
alloced += 1;
|
|
|
|
// our allocator should stop at some point...
|
|
assert(alloced < 2*BLOCK_COUNT);
|
|
}
|
|
|
|
// excluding our mroot, we should have allocated exactly
|
|
// block_count-2 blocks
|
|
printf("alloced %d/%d blocks\n", alloced, (lfs_block_t)BLOCK_COUNT);
|
|
assert(alloced == BLOCK_COUNT-2);
|
|
|
|
lfsr_unmount(&lfs) => 0;
|
|
'''
|
|
|
|
# test that we can realloc after an ack
|
|
[cases.test_alloc_reuse]
|
|
in = 'lfs.c'
|
|
code = '''
|
|
lfs_t lfs;
|
|
lfsr_format(&lfs, cfg) => 0;
|
|
lfsr_mount(&lfs, cfg) => 0;
|
|
|
|
// start allocating
|
|
lfs_alloc_ack(&lfs);
|
|
lfs_size_t alloced = 0;
|
|
while (true) {
|
|
lfs_block_t block;
|
|
int err = lfs_alloc(&lfs, &block);
|
|
assert(!err || err == LFS_ERR_NOSPC);
|
|
|
|
if (err == LFS_ERR_NOSPC) {
|
|
break;
|
|
}
|
|
alloced += 1;
|
|
|
|
// our allocator should stop at some point...
|
|
assert(alloced < 2*BLOCK_COUNT);
|
|
}
|
|
|
|
// excluding our mroot, we should have allocated exactly
|
|
// block_count-2 blocks
|
|
printf("alloced %d/%d blocks\n", alloced, (lfs_block_t)BLOCK_COUNT);
|
|
assert(alloced == BLOCK_COUNT-2);
|
|
|
|
// ack again, effectively releasing all the previously alloced blocks
|
|
lfs_alloc_ack(&lfs);
|
|
alloced = 0;
|
|
while (true) {
|
|
lfs_block_t block;
|
|
int err = lfs_alloc(&lfs, &block);
|
|
assert(!err || err == LFS_ERR_NOSPC);
|
|
|
|
if (err == LFS_ERR_NOSPC) {
|
|
break;
|
|
}
|
|
alloced += 1;
|
|
|
|
// our allocator should stop at some point...
|
|
assert(alloced < 2*BLOCK_COUNT);
|
|
}
|
|
|
|
// excluding our mroot, we should have allocated exactly
|
|
// block_count-2 blocks
|
|
printf("alloced %d/%d blocks\n", alloced, (lfs_block_t)BLOCK_COUNT);
|
|
assert(alloced == BLOCK_COUNT-2);
|
|
|
|
lfsr_unmount(&lfs) => 0;
|
|
'''
|
|
|
|
# test that we can alloc an mtree, the difference between this and mtree tests
|
|
# is we expect this to be able to handle wrap-around
|
|
[cases.test_alloc_mtree]
|
|
in = 'lfs.c'
|
|
code = '''
|
|
const char *alphas = "abcdefghijklmnopqrstuvwxyz";
|
|
lfs_t lfs;
|
|
lfsr_format(&lfs, cfg) => 0;
|
|
lfsr_mount(&lfs, cfg) => 0;
|
|
|
|
lfsr_mdir_t mdir;
|
|
lfsr_mtree_lookup(&lfs, lfsr_mtree_weight(&lfs)-1, &mdir) => 0;
|
|
lfs_ssize_t rid = 0;
|
|
|
|
lfs_size_t count = 0;
|
|
while (true) {
|
|
// at least try to catch infinite loops
|
|
assert(count < BLOCK_SIZE * BLOCK_COUNT/2);
|
|
|
|
// ack before each commit to reset the allocator
|
|
lfs_alloc_ack(&lfs);
|
|
|
|
// keep creating new metadata entries until we run out of space
|
|
int err = lfsr_mdir_commit(&lfs, &mdir, &rid, LFSR_ATTRS(
|
|
LFSR_ATTR(rid, INLINED, +1, &alphas[count % 26], 1)));
|
|
assert(!err || err == LFS_ERR_NOSPC);
|
|
if (err == LFS_ERR_NOSPC) {
|
|
break;
|
|
}
|
|
|
|
uint8_t buffer[4];
|
|
lfsr_mdir_get(&lfs, &mdir, rid, LFSR_TAG_INLINED,
|
|
buffer, 4) => 1;
|
|
assert(memcmp(buffer, &alphas[count % 26], 1) == 0);
|
|
|
|
count += 1;
|
|
rid += 1;
|
|
}
|
|
|
|
printf("alloced %d metadata entries in %d blocks\n",
|
|
count, (lfs_block_t)BLOCK_COUNT);
|
|
|
|
// test that all of our metadata entries are still there
|
|
lfs_size_t i = 0;
|
|
for (lfs_ssize_t mid = (lfsr_mtree_isinlined(&lfs) ? -1 : 0);
|
|
mid < lfsr_mtree_weight(&lfs);
|
|
mid++) {
|
|
lfsr_mdir_t mdir;
|
|
lfsr_mtree_lookup(&lfs, mid, &mdir) => 0;
|
|
for (lfs_ssize_t rid = 0;
|
|
rid < (lfs_ssize_t)lfsr_mdir_weight(&mdir);
|
|
rid++) {
|
|
uint8_t buffer[4];
|
|
lfsr_mdir_get(&lfs, &mdir, rid, LFSR_TAG_INLINED,
|
|
buffer, 4) => 1;
|
|
assert(memcmp(buffer, &alphas[i % 26], 1) == 0);
|
|
i += 1;
|
|
}
|
|
}
|
|
assert(i == count);
|
|
|
|
lfsr_unmount(&lfs) => 0;
|
|
'''
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
## allocator tests
|
|
## note for these to work there are a number constraints on the device geometry
|
|
#if = 'BLOCK_CYCLES == -1'
|
|
#
|
|
## parallel allocation test
|
|
#[cases.test_alloc_parallel]
|
|
#defines.FILES = 3
|
|
#defines.SIZE = '(((BLOCK_SIZE-8)*(BLOCK_COUNT-6)) / FILES)'
|
|
#code = '''
|
|
# const char *names[] = {"bacon", "eggs", "pancakes"};
|
|
# lfs_file_t files[FILES];
|
|
#
|
|
# lfs_t lfs;
|
|
# lfs_format(&lfs, cfg) => 0;
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# lfs_mkdir(&lfs, "breakfast") => 0;
|
|
# lfs_unmount(&lfs) => 0;
|
|
#
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# for (int n = 0; n < FILES; n++) {
|
|
# char path[1024];
|
|
# sprintf(path, "breakfast/%s", names[n]);
|
|
# lfs_file_open(&lfs, &files[n], path,
|
|
# LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
|
|
# }
|
|
# for (int n = 0; n < FILES; n++) {
|
|
# size_t size = strlen(names[n]);
|
|
# for (lfs_size_t i = 0; i < SIZE; i += size) {
|
|
# lfs_file_write(&lfs, &files[n], names[n], size) => size;
|
|
# }
|
|
# }
|
|
# for (int n = 0; n < FILES; n++) {
|
|
# lfs_file_close(&lfs, &files[n]) => 0;
|
|
# }
|
|
# lfs_unmount(&lfs) => 0;
|
|
#
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# for (int n = 0; n < FILES; n++) {
|
|
# char path[1024];
|
|
# sprintf(path, "breakfast/%s", names[n]);
|
|
# lfs_file_t file;
|
|
# lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
|
|
# size_t size = strlen(names[n]);
|
|
# for (lfs_size_t i = 0; i < SIZE; i += size) {
|
|
# uint8_t buffer[1024];
|
|
# lfs_file_read(&lfs, &file, buffer, size) => size;
|
|
# assert(memcmp(buffer, names[n], size) == 0);
|
|
# }
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
# }
|
|
# lfs_unmount(&lfs) => 0;
|
|
#'''
|
|
#
|
|
## serial allocation test
|
|
#[cases.test_alloc_serial]
|
|
#defines.FILES = 3
|
|
#defines.SIZE = '(((BLOCK_SIZE-8)*(BLOCK_COUNT-6)) / FILES)'
|
|
#code = '''
|
|
# const char *names[] = {"bacon", "eggs", "pancakes"};
|
|
#
|
|
# lfs_t lfs;
|
|
# lfs_format(&lfs, cfg) => 0;
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# lfs_mkdir(&lfs, "breakfast") => 0;
|
|
# lfs_unmount(&lfs) => 0;
|
|
#
|
|
# for (int n = 0; n < FILES; n++) {
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# char path[1024];
|
|
# sprintf(path, "breakfast/%s", names[n]);
|
|
# lfs_file_t file;
|
|
# lfs_file_open(&lfs, &file, path,
|
|
# LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
|
|
# size_t size = strlen(names[n]);
|
|
# uint8_t buffer[1024];
|
|
# memcpy(buffer, names[n], size);
|
|
# for (int i = 0; i < SIZE; i += size) {
|
|
# lfs_file_write(&lfs, &file, buffer, size) => size;
|
|
# }
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
# lfs_unmount(&lfs) => 0;
|
|
# }
|
|
#
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# for (int n = 0; n < FILES; n++) {
|
|
# char path[1024];
|
|
# sprintf(path, "breakfast/%s", names[n]);
|
|
# lfs_file_t file;
|
|
# lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
|
|
# size_t size = strlen(names[n]);
|
|
# for (int i = 0; i < SIZE; i += size) {
|
|
# uint8_t buffer[1024];
|
|
# lfs_file_read(&lfs, &file, buffer, size) => size;
|
|
# assert(memcmp(buffer, names[n], size) == 0);
|
|
# }
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
# }
|
|
# lfs_unmount(&lfs) => 0;
|
|
#'''
|
|
#
|
|
## parallel allocation reuse test
|
|
#[cases.test_alloc_parallel_reuse]
|
|
#defines.FILES = 3
|
|
#defines.SIZE = '(((BLOCK_SIZE-8)*(BLOCK_COUNT-6)) / FILES)'
|
|
#defines.CYCLES = [1, 10]
|
|
#code = '''
|
|
# const char *names[] = {"bacon", "eggs", "pancakes"};
|
|
# lfs_file_t files[FILES];
|
|
#
|
|
# lfs_t lfs;
|
|
# lfs_format(&lfs, cfg) => 0;
|
|
#
|
|
# for (int c = 0; c < CYCLES; c++) {
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# lfs_mkdir(&lfs, "breakfast") => 0;
|
|
# lfs_unmount(&lfs) => 0;
|
|
#
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# for (int n = 0; n < FILES; n++) {
|
|
# char path[1024];
|
|
# sprintf(path, "breakfast/%s", names[n]);
|
|
# lfs_file_open(&lfs, &files[n], path,
|
|
# LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
|
|
# }
|
|
# for (int n = 0; n < FILES; n++) {
|
|
# size_t size = strlen(names[n]);
|
|
# for (int i = 0; i < SIZE; i += size) {
|
|
# lfs_file_write(&lfs, &files[n], names[n], size) => size;
|
|
# }
|
|
# }
|
|
# for (int n = 0; n < FILES; n++) {
|
|
# lfs_file_close(&lfs, &files[n]) => 0;
|
|
# }
|
|
# lfs_unmount(&lfs) => 0;
|
|
#
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# for (int n = 0; n < FILES; n++) {
|
|
# char path[1024];
|
|
# sprintf(path, "breakfast/%s", names[n]);
|
|
# lfs_file_t file;
|
|
# lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
|
|
# size_t size = strlen(names[n]);
|
|
# for (int i = 0; i < SIZE; i += size) {
|
|
# uint8_t buffer[1024];
|
|
# lfs_file_read(&lfs, &file, buffer, size) => size;
|
|
# assert(memcmp(buffer, names[n], size) == 0);
|
|
# }
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
# }
|
|
# lfs_unmount(&lfs) => 0;
|
|
#
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# for (int n = 0; n < FILES; n++) {
|
|
# char path[1024];
|
|
# sprintf(path, "breakfast/%s", names[n]);
|
|
# lfs_remove(&lfs, path) => 0;
|
|
# }
|
|
# lfs_remove(&lfs, "breakfast") => 0;
|
|
# lfs_unmount(&lfs) => 0;
|
|
# }
|
|
#'''
|
|
#
|
|
## serial allocation reuse test
|
|
#[cases.test_alloc_serial_reuse]
|
|
#defines.FILES = 3
|
|
#defines.SIZE = '(((BLOCK_SIZE-8)*(BLOCK_COUNT-6)) / FILES)'
|
|
#defines.CYCLES = [1, 10]
|
|
#code = '''
|
|
# const char *names[] = {"bacon", "eggs", "pancakes"};
|
|
#
|
|
# lfs_t lfs;
|
|
# lfs_format(&lfs, cfg) => 0;
|
|
#
|
|
# for (int c = 0; c < CYCLES; c++) {
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# lfs_mkdir(&lfs, "breakfast") => 0;
|
|
# lfs_unmount(&lfs) => 0;
|
|
#
|
|
# for (int n = 0; n < FILES; n++) {
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# char path[1024];
|
|
# sprintf(path, "breakfast/%s", names[n]);
|
|
# lfs_file_t file;
|
|
# lfs_file_open(&lfs, &file, path,
|
|
# LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
|
|
# size_t size = strlen(names[n]);
|
|
# uint8_t buffer[1024];
|
|
# memcpy(buffer, names[n], size);
|
|
# for (int i = 0; i < SIZE; i += size) {
|
|
# lfs_file_write(&lfs, &file, buffer, size) => size;
|
|
# }
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
# lfs_unmount(&lfs) => 0;
|
|
# }
|
|
#
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# for (int n = 0; n < FILES; n++) {
|
|
# char path[1024];
|
|
# sprintf(path, "breakfast/%s", names[n]);
|
|
# lfs_file_t file;
|
|
# lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
|
|
# size_t size = strlen(names[n]);
|
|
# for (int i = 0; i < SIZE; i += size) {
|
|
# uint8_t buffer[1024];
|
|
# lfs_file_read(&lfs, &file, buffer, size) => size;
|
|
# assert(memcmp(buffer, names[n], size) == 0);
|
|
# }
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
# }
|
|
# lfs_unmount(&lfs) => 0;
|
|
#
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# for (int n = 0; n < FILES; n++) {
|
|
# char path[1024];
|
|
# sprintf(path, "breakfast/%s", names[n]);
|
|
# lfs_remove(&lfs, path) => 0;
|
|
# }
|
|
# lfs_remove(&lfs, "breakfast") => 0;
|
|
# lfs_unmount(&lfs) => 0;
|
|
# }
|
|
#'''
|
|
#
|
|
## exhaustion test
|
|
#[cases.test_alloc_exhaustion]
|
|
#code = '''
|
|
# lfs_t lfs;
|
|
# lfs_format(&lfs, cfg) => 0;
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# lfs_file_t file;
|
|
# lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
|
|
# size_t size = strlen("exhaustion");
|
|
# uint8_t buffer[1024];
|
|
# memcpy(buffer, "exhaustion", size);
|
|
# lfs_file_write(&lfs, &file, buffer, size) => size;
|
|
# lfs_file_sync(&lfs, &file) => 0;
|
|
#
|
|
# size = strlen("blahblahblahblah");
|
|
# memcpy(buffer, "blahblahblahblah", size);
|
|
# lfs_ssize_t res;
|
|
# while (true) {
|
|
# res = lfs_file_write(&lfs, &file, buffer, size);
|
|
# if (res < 0) {
|
|
# break;
|
|
# }
|
|
#
|
|
# res => size;
|
|
# }
|
|
# res => LFS_ERR_NOSPC;
|
|
#
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
# lfs_unmount(&lfs) => 0;
|
|
#
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# lfs_file_open(&lfs, &file, "exhaustion", LFS_O_RDONLY);
|
|
# size = strlen("exhaustion");
|
|
# lfs_file_size(&lfs, &file) => size;
|
|
# lfs_file_read(&lfs, &file, buffer, size) => size;
|
|
# memcmp(buffer, "exhaustion", size) => 0;
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
# lfs_unmount(&lfs) => 0;
|
|
#'''
|
|
#
|
|
## exhaustion wraparound test
|
|
#[cases.test_alloc_exhaustion_wraparound]
|
|
#defines.SIZE = '(((BLOCK_SIZE-8)*(BLOCK_COUNT-4)) / 3)'
|
|
#code = '''
|
|
# lfs_t lfs;
|
|
# lfs_format(&lfs, cfg) => 0;
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
#
|
|
# lfs_file_t file;
|
|
# lfs_file_open(&lfs, &file, "padding", LFS_O_WRONLY | LFS_O_CREAT);
|
|
# size_t size = strlen("buffering");
|
|
# uint8_t buffer[1024];
|
|
# memcpy(buffer, "buffering", size);
|
|
# for (int i = 0; i < SIZE; i += size) {
|
|
# lfs_file_write(&lfs, &file, buffer, size) => size;
|
|
# }
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
# lfs_remove(&lfs, "padding") => 0;
|
|
#
|
|
# lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
|
|
# size = strlen("exhaustion");
|
|
# memcpy(buffer, "exhaustion", size);
|
|
# lfs_file_write(&lfs, &file, buffer, size) => size;
|
|
# lfs_file_sync(&lfs, &file) => 0;
|
|
#
|
|
# size = strlen("blahblahblahblah");
|
|
# memcpy(buffer, "blahblahblahblah", size);
|
|
# lfs_ssize_t res;
|
|
# while (true) {
|
|
# res = lfs_file_write(&lfs, &file, buffer, size);
|
|
# if (res < 0) {
|
|
# break;
|
|
# }
|
|
#
|
|
# res => size;
|
|
# }
|
|
# res => LFS_ERR_NOSPC;
|
|
#
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
# lfs_unmount(&lfs) => 0;
|
|
#
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# lfs_file_open(&lfs, &file, "exhaustion", LFS_O_RDONLY);
|
|
# size = strlen("exhaustion");
|
|
# lfs_file_size(&lfs, &file) => size;
|
|
# lfs_file_read(&lfs, &file, buffer, size) => size;
|
|
# memcmp(buffer, "exhaustion", size) => 0;
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
# lfs_remove(&lfs, "exhaustion") => 0;
|
|
# lfs_unmount(&lfs) => 0;
|
|
#'''
|
|
#
|
|
## dir exhaustion test
|
|
#[cases.test_alloc_dir_exhaustion]
|
|
#code = '''
|
|
# lfs_t lfs;
|
|
# lfs_format(&lfs, cfg) => 0;
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
#
|
|
# // find out max file size
|
|
# lfs_mkdir(&lfs, "exhaustiondir") => 0;
|
|
# size_t size = strlen("blahblahblahblah");
|
|
# uint8_t buffer[1024];
|
|
# memcpy(buffer, "blahblahblahblah", size);
|
|
# lfs_file_t file;
|
|
# lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
|
|
# int count = 0;
|
|
# int err;
|
|
# while (true) {
|
|
# err = lfs_file_write(&lfs, &file, buffer, size);
|
|
# if (err < 0) {
|
|
# break;
|
|
# }
|
|
#
|
|
# count += 1;
|
|
# }
|
|
# err => LFS_ERR_NOSPC;
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
#
|
|
# lfs_remove(&lfs, "exhaustion") => 0;
|
|
# lfs_remove(&lfs, "exhaustiondir") => 0;
|
|
#
|
|
# // see if dir fits with max file size
|
|
# lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
|
|
# for (int i = 0; i < count; i++) {
|
|
# lfs_file_write(&lfs, &file, buffer, size) => size;
|
|
# }
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
#
|
|
# lfs_mkdir(&lfs, "exhaustiondir") => 0;
|
|
# lfs_remove(&lfs, "exhaustiondir") => 0;
|
|
# lfs_remove(&lfs, "exhaustion") => 0;
|
|
#
|
|
# // see if dir fits with > max file size
|
|
# lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
|
|
# for (int i = 0; i < count+1; i++) {
|
|
# lfs_file_write(&lfs, &file, buffer, size) => size;
|
|
# }
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
#
|
|
# lfs_mkdir(&lfs, "exhaustiondir") => LFS_ERR_NOSPC;
|
|
#
|
|
# lfs_remove(&lfs, "exhaustion") => 0;
|
|
# lfs_unmount(&lfs) => 0;
|
|
#'''
|
|
#
|
|
## what if we have a bad block during an allocation scan?
|
|
#[cases.test_alloc_bad_blocks]
|
|
#in = "lfs.c"
|
|
#defines.ERASE_CYCLES = 0xffffffff
|
|
#defines.BADBLOCK_BEHAVIOR = 'LFS_EMUBD_BADBLOCK_READERROR'
|
|
#code = '''
|
|
# lfs_t lfs;
|
|
# lfs_format(&lfs, cfg) => 0;
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# // first fill to exhaustion to find available space
|
|
# lfs_file_t file;
|
|
# lfs_file_open(&lfs, &file, "pacman", LFS_O_WRONLY | LFS_O_CREAT) => 0;
|
|
# uint8_t buffer[1024];
|
|
# strcpy((char*)buffer, "waka");
|
|
# size_t size = strlen("waka");
|
|
# lfs_size_t filesize = 0;
|
|
# while (true) {
|
|
# lfs_ssize_t res = lfs_file_write(&lfs, &file, buffer, size);
|
|
# assert(res == (lfs_ssize_t)size || res == LFS_ERR_NOSPC);
|
|
# if (res == LFS_ERR_NOSPC) {
|
|
# break;
|
|
# }
|
|
# filesize += size;
|
|
# }
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
# // now fill all but a couple of blocks of the filesystem with data
|
|
# filesize -= 3*BLOCK_SIZE;
|
|
# lfs_file_open(&lfs, &file, "pacman", LFS_O_WRONLY | LFS_O_CREAT) => 0;
|
|
# strcpy((char*)buffer, "waka");
|
|
# size = strlen("waka");
|
|
# for (lfs_size_t i = 0; i < filesize/size; i++) {
|
|
# lfs_file_write(&lfs, &file, buffer, size) => size;
|
|
# }
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
# // also save head of file so we can error during lookahead scan
|
|
# lfs_block_t fileblock = file.ctz.head;
|
|
# lfs_unmount(&lfs) => 0;
|
|
#
|
|
# // remount to force an alloc scan
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
#
|
|
# // but mark the head of our file as a "bad block", this is force our
|
|
# // scan to bail early
|
|
# lfs_emubd_setwear(cfg, fileblock, 0xffffffff) => 0;
|
|
# lfs_file_open(&lfs, &file, "ghost", LFS_O_WRONLY | LFS_O_CREAT) => 0;
|
|
# strcpy((char*)buffer, "chomp");
|
|
# size = strlen("chomp");
|
|
# while (true) {
|
|
# lfs_ssize_t res = lfs_file_write(&lfs, &file, buffer, size);
|
|
# assert(res == (lfs_ssize_t)size || res == LFS_ERR_CORRUPT);
|
|
# if (res == LFS_ERR_CORRUPT) {
|
|
# break;
|
|
# }
|
|
# }
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
#
|
|
# // now reverse the "bad block" and try to write the file again until we
|
|
# // run out of space
|
|
# lfs_emubd_setwear(cfg, fileblock, 0) => 0;
|
|
# lfs_file_open(&lfs, &file, "ghost", LFS_O_WRONLY | LFS_O_CREAT) => 0;
|
|
# strcpy((char*)buffer, "chomp");
|
|
# size = strlen("chomp");
|
|
# while (true) {
|
|
# lfs_ssize_t res = lfs_file_write(&lfs, &file, buffer, size);
|
|
# assert(res == (lfs_ssize_t)size || res == LFS_ERR_NOSPC);
|
|
# if (res == LFS_ERR_NOSPC) {
|
|
# break;
|
|
# }
|
|
# }
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
#
|
|
# lfs_unmount(&lfs) => 0;
|
|
#
|
|
# // check that the disk isn't hurt
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
# lfs_file_open(&lfs, &file, "pacman", LFS_O_RDONLY) => 0;
|
|
# strcpy((char*)buffer, "waka");
|
|
# size = strlen("waka");
|
|
# for (lfs_size_t i = 0; i < filesize/size; i++) {
|
|
# uint8_t rbuffer[4];
|
|
# lfs_file_read(&lfs, &file, rbuffer, size) => size;
|
|
# assert(memcmp(rbuffer, buffer, size) == 0);
|
|
# }
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
# lfs_unmount(&lfs) => 0;
|
|
#'''
|
|
#
|
|
#
|
|
## Below, I don't like these tests. They're fragile and depend _heavily_
|
|
## on the geometry of the block device. But they are valuable. Eventually they
|
|
## should be removed and replaced with generalized tests.
|
|
#
|
|
## chained dir exhaustion test
|
|
#[cases.test_alloc_chained_dir_exhaustion]
|
|
#if = 'BLOCK_SIZE == 512'
|
|
#defines.BLOCK_COUNT = 1024
|
|
#code = '''
|
|
# lfs_t lfs;
|
|
# lfs_format(&lfs, cfg) => 0;
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
#
|
|
# // find out max file size
|
|
# lfs_mkdir(&lfs, "exhaustiondir") => 0;
|
|
# for (int i = 0; i < 10; i++) {
|
|
# char path[1024];
|
|
# sprintf(path, "dirwithanexhaustivelylongnameforpadding%d", i);
|
|
# lfs_mkdir(&lfs, path) => 0;
|
|
# }
|
|
# size_t size = strlen("blahblahblahblah");
|
|
# uint8_t buffer[1024];
|
|
# memcpy(buffer, "blahblahblahblah", size);
|
|
# lfs_file_t file;
|
|
# lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
|
|
# int count = 0;
|
|
# int err;
|
|
# while (true) {
|
|
# err = lfs_file_write(&lfs, &file, buffer, size);
|
|
# if (err < 0) {
|
|
# break;
|
|
# }
|
|
#
|
|
# count += 1;
|
|
# }
|
|
# err => LFS_ERR_NOSPC;
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
#
|
|
# lfs_remove(&lfs, "exhaustion") => 0;
|
|
# lfs_remove(&lfs, "exhaustiondir") => 0;
|
|
# for (int i = 0; i < 10; i++) {
|
|
# char path[1024];
|
|
# sprintf(path, "dirwithanexhaustivelylongnameforpadding%d", i);
|
|
# lfs_remove(&lfs, path) => 0;
|
|
# }
|
|
#
|
|
# // see that chained dir fails
|
|
# lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
|
|
# for (int i = 0; i < count+1; i++) {
|
|
# lfs_file_write(&lfs, &file, buffer, size) => size;
|
|
# }
|
|
# lfs_file_sync(&lfs, &file) => 0;
|
|
#
|
|
# for (int i = 0; i < 10; i++) {
|
|
# char path[1024];
|
|
# sprintf(path, "dirwithanexhaustivelylongnameforpadding%d", i);
|
|
# lfs_mkdir(&lfs, path) => 0;
|
|
# }
|
|
#
|
|
# lfs_mkdir(&lfs, "exhaustiondir") => LFS_ERR_NOSPC;
|
|
#
|
|
# // shorten file to try a second chained dir
|
|
# while (true) {
|
|
# err = lfs_mkdir(&lfs, "exhaustiondir");
|
|
# if (err != LFS_ERR_NOSPC) {
|
|
# break;
|
|
# }
|
|
#
|
|
# lfs_ssize_t filesize = lfs_file_size(&lfs, &file);
|
|
# filesize > 0 => true;
|
|
#
|
|
# lfs_file_truncate(&lfs, &file, filesize - size) => 0;
|
|
# lfs_file_sync(&lfs, &file) => 0;
|
|
# }
|
|
# err => 0;
|
|
#
|
|
# lfs_mkdir(&lfs, "exhaustiondir2") => LFS_ERR_NOSPC;
|
|
#
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
# lfs_unmount(&lfs) => 0;
|
|
#'''
|
|
#
|
|
## split dir test
|
|
#[cases.test_alloc_split_dir]
|
|
#if = 'BLOCK_SIZE == 512'
|
|
#defines.BLOCK_COUNT = 1024
|
|
#code = '''
|
|
# lfs_t lfs;
|
|
# lfs_format(&lfs, cfg) => 0;
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
#
|
|
# // create one block hole for half a directory
|
|
# lfs_file_t file;
|
|
# lfs_file_open(&lfs, &file, "bump", LFS_O_WRONLY | LFS_O_CREAT) => 0;
|
|
# for (lfs_size_t i = 0; i < cfg->block_size; i += 2) {
|
|
# uint8_t buffer[1024];
|
|
# memcpy(&buffer[i], "hi", 2);
|
|
# }
|
|
# uint8_t buffer[1024];
|
|
# lfs_file_write(&lfs, &file, buffer, cfg->block_size) => cfg->block_size;
|
|
# lfs_file_close(&lfs, &file) => 0;
|
|
#
|
|
# lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
|
|
# size_t 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;
|
|
#'''
|
|
#
|
|
## outdated lookahead test
|
|
#[cases.test_alloc_outdated_lookahead]
|
|
#if = 'BLOCK_SIZE == 512'
|
|
#defines.BLOCK_COUNT = 1024
|
|
#code = '''
|
|
# lfs_t lfs;
|
|
# lfs_format(&lfs, cfg) => 0;
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
#
|
|
# // fill completely with two files
|
|
# lfs_file_t file;
|
|
# lfs_file_open(&lfs, &file, "exhaustion1",
|
|
# LFS_O_WRONLY | LFS_O_CREAT) => 0;
|
|
# size_t size = strlen("blahblahblahblah");
|
|
# uint8_t buffer[1024];
|
|
# 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;
|
|
#'''
|
|
#
|
|
## outdated lookahead and split dir test
|
|
#[cases.test_alloc_outdated_lookahead_split_dir]
|
|
#if = 'BLOCK_SIZE == 512'
|
|
#defines.BLOCK_COUNT = 1024
|
|
#code = '''
|
|
# lfs_t lfs;
|
|
# lfs_format(&lfs, cfg) => 0;
|
|
# lfs_mount(&lfs, cfg) => 0;
|
|
#
|
|
# // fill completely with two files
|
|
# lfs_file_t file;
|
|
# lfs_file_open(&lfs, &file, "exhaustion1",
|
|
# LFS_O_WRONLY | LFS_O_CREAT) => 0;
|
|
# size_t size = strlen("blahblahblahblah");
|
|
# uint8_t buffer[1024];
|
|
# 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;
|
|
#'''
|