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littlefs/tests/test_fwrite.toml
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Christopher Haster f29a4982c4 Added block-level erased-state checksums 
Much like the erased-state checksums in our rbyds (ecksums), these
block-level erased-state checksums (becksums) allow us to detect failed
progs to erased parts of a block and are key to achieving efficient
incremental write performance with large blocks and frequent power
cycles/open-close cycles.

These are also key to achieving _reasonable_ write performance for
simple writes (linear, non-overwriting), since littlefs now relies
solely on becksums to efficiently append to blocks.

Though I suppose the previous block staging logic used with the CTZ
skip-list could be brought back to make becksums optional and avoid
btree lookups during simple writes (we do a _lot_ of btree
lookups)... I'll leave this open as a future optimization...

Unlike in-rbyd ecksums, becksums need to be stored out-of-band so our
data blocks only contain raw data. Since they are optional, an
additional tag in the file's btree makes sense.

Becksums are relatively simple, but they bring some challenges:

1. Adding becksums to file btrees is the first case we have for multiple
   struct tags per btree id.

   This isn't too complicated a problem, but requires some new internal
   btree APIs.

   Looking forward, which I probably shouldn't be doing this often,
   multiple struct tags will also be useful for parity and content ids
   as a part of data redundancy and data deduplication, though I think
   it's uncontroversial to consider this both heavier-weight features...

2. Becksums only work if unfilled blocks are aligned to the prog_size.

   This is the whole point of crystal_size -- to provide temporary
   storage for unaligned writes -- but actually aligning the block
   during writes turns out to be a bit tricky without a bunch of
   unecesssary btree lookups (we already do too many btree lookups!).

   The current implementation here discards the pcache to force
   alignment, taking advantage of the requirement that
   cache_size >= prog_size, but this is corrupting our block checksums.

Code cost:

           code          stack
  before: 31248           2792
  after:  32060 (+2.5%)   2864 (+2.5%)

Also lfsr_ftree_flush needs work. I'm usually open to gotos in C when
they improve internal logic, but even for me, the multiple goto jumps
from every left-neighbor lookup into the block writing loop is a bit
much...
2023-12-14 01:05:34 -06:00

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# More extensive file writing tests
after = 'test_files'
# TODO should fragment_size accept 0?
# test with different fragment sizes
defines.FRAGMENT_SIZE = [1, 16, 64]
# test with different crystal sizes
defines.CRYSTAL_SIZE = [512]
# test with different prog sizes
defines.PROG_SIZE = [1, 16]
# more complex writing patterns to inlined files
# write files incrementally
[cases.test_fwrite_incr]
defines.SIZE = [
'0',
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = [32, 8, 1]
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
if = [
'CHUNK <= SIZE',
# this just save testing time
'SIZE / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file, truncating in case of powerloss
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
uint8_t wbuf[SIZE];
uint32_t prng = 42;
for (lfs_size_t i = 0; i < SIZE; i++) {
wbuf[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
lfsr_file_write(&lfs, &file, &wbuf[i], CHUNK) => CHUNK;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
// note the switch to append here
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_APPEND) => 0;
}
}
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => SIZE;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => SIZE;
assert(memcmp(rbuf, wbuf, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# overwrite files
# TODO this is too slow right now, but should speed up with better
# write strategies
[cases.test_fwrite_overwrite]
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = [32, 8, 1]
# bit 0 => first chunk
# bit 1 => middle chunk
# bit 2 => last chunk
defines.MASK = [0, 1, 2, 3, 4, 5, 6, 7]
# 0 => in-order
# 1 => reversed
defines.ORDER = [0, 1]
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
if = [
'CHUNK <= SIZE',
# this just save testing time
'SIZE / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file, truncating in case of powerloss
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
uint32_t prng = 42;
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// write first chunk?
if (MASK & 0x1) {
if (ORDER == 0) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfsr_file_write(&lfs, &file, &sim[0], CHUNK) => CHUNK;
} else {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE-CHUNK+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE-CHUNK, LFS_SEEK_SET) => SIZE-CHUNK;
lfsr_file_write(&lfs, &file, &sim[SIZE-CHUNK], CHUNK) => CHUNK;
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
}
// write second chunk?
if (MASK & 0x2) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE/2-CHUNK/2+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE/2 - CHUNK/2, LFS_SEEK_SET)
=> SIZE/2 - CHUNK/2;
lfsr_file_write(&lfs, &file, &sim[SIZE/2-CHUNK/2], CHUNK) => CHUNK;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
}
// write third chunk?
if (MASK & 0x4) {
if (ORDER == 0) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE-CHUNK+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE-CHUNK, LFS_SEEK_SET) => SIZE-CHUNK;
lfsr_file_write(&lfs, &file, &sim[SIZE-CHUNK], CHUNK) => CHUNK;
} else {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfsr_file_write(&lfs, &file, &sim[0], CHUNK) => CHUNK;
}
}
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => SIZE;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => SIZE;
// does our file match our simulation?
assert(memcmp(rbuf, sim, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# similar to overwrite files, but without underlying data
[cases.test_fwrite_holes]
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = [32, 8, 1]
# bit 0 => first chunk
# bit 1 => middle chunk
# bit 2 => last chunk
defines.MASK = [0, 1, 2, 3, 4, 5, 6, 7]
# 0 => in-order
# 1 => reversed
defines.ORDER = [0, 1]
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
if = [
'CHUNK <= SIZE',
# this just save testing time
'SIZE / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file, truncating in case of powerloss
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
uint32_t prng = 42;
memset(sim, 0, SIZE);
// we may not write the entire file
lfs_off_t size
= (MASK & ((ORDER == 0) ? 0x4 : 0x1)) ? SIZE
: (MASK & ((ORDER == 0) ? 0x2 : 0x2)) ? SIZE/2 + (CHUNK+2-1)/2
: (MASK & ((ORDER == 0) ? 0x1 : 0x4)) ? CHUNK
: 0;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// write first chunk?
if (MASK & 0x1) {
if (ORDER == 0) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfsr_file_write(&lfs, &file, &sim[0], CHUNK) => CHUNK;
} else {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE-CHUNK+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE-CHUNK, LFS_SEEK_SET) => SIZE-CHUNK;
lfsr_file_write(&lfs, &file, &sim[SIZE-CHUNK], CHUNK) => CHUNK;
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
}
// write second chunk?
if (MASK & 0x2) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE/2-CHUNK/2+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE/2 - CHUNK/2, LFS_SEEK_SET)
=> SIZE/2 - CHUNK/2;
lfsr_file_write(&lfs, &file, &sim[SIZE/2-CHUNK/2], CHUNK) => CHUNK;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
}
// write third chunk?
if (MASK & 0x4) {
if (ORDER == 0) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE-CHUNK+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE-CHUNK, LFS_SEEK_SET) => SIZE-CHUNK;
lfsr_file_write(&lfs, &file, &sim[SIZE-CHUNK], CHUNK) => CHUNK;
} else {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfsr_file_write(&lfs, &file, &sim[0], CHUNK) => CHUNK;
}
}
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => size;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => size;
// does our file match our simulation?
assert(memcmp(rbuf, sim, size) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# simple truncate test
[cases.test_fwrite_truncate]
defines.FROM = [
'0',
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.TO = [
'0',
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
if = [
# these just save testing time
'FROM / FRAGMENT_SIZE <= 4096',
'TO / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file, truncating in case of powerloss
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
// simulate our file in ram
uint8_t sim[lfs_max32(FROM,TO)];
memset(sim, 0, lfs_max32(FROM,TO));
uint32_t prng = 42;
for (lfs_size_t i = 0; i < FROM; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, FROM) => FROM;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// truncate to new size
lfsr_file_truncate(&lfs, &file, TO) => 0;
if (TO < FROM) {
memset(sim+TO, 0, FROM-TO);
}
// close
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == TO);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == TO);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => TO;
// try reading
uint8_t rbuf[2*TO];
memset(rbuf, 0xaa, 2*TO);
lfsr_file_read(&lfs, &file, rbuf, 2*TO) => TO;
assert(memcmp(rbuf, sim, TO) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# one purpose of this test is to check that data is not hidden
# and then revealed by truncate, that would be bad
[cases.test_fwrite_truncate_2]
defines.FROM = [
'0',
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.AND = [
'0',
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.TO = [
'0',
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
if = [
# these just save testing time
'FROM / FRAGMENT_SIZE <= 4096',
'AND / FRAGMENT_SIZE <= 4096',
'TO / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file, truncating in case of powerloss
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
// simulate our file in ram
uint8_t sim[lfs_max32(FROM,lfs_max32(AND,TO))];
memset(sim, 0, lfs_max32(FROM,lfs_max32(AND,TO)));
uint32_t prng = 42;
for (lfs_size_t i = 0; i < FROM; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, FROM) => FROM;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// truncate to intermediate size
lfsr_file_truncate(&lfs, &file, AND) => 0;
if (AND < FROM) {
memset(sim+AND, 0, FROM-AND);
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// truncate to new size
lfsr_file_truncate(&lfs, &file, TO) => 0;
if (TO < AND) {
memset(sim+TO, 0, AND-TO);
}
// close
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == TO);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == TO);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => TO;
// try reading
uint8_t rbuf[2*TO];
memset(rbuf, 0xaa, 2*TO);
lfsr_file_read(&lfs, &file, rbuf, 2*TO) => TO;
assert(memcmp(rbuf, sim, TO) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# simple fruncate test
[cases.test_fwrite_fruncate]
defines.FROM = [
'0',
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.TO = [
'0',
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
if = [
# these just save testing time
'FROM / FRAGMENT_SIZE <= 4096',
'TO / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file, truncating in case of powerloss
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
// simulate our file in ram
uint8_t sim[lfs_max32(FROM,TO)];
memset(sim, 0, lfs_max32(FROM,TO));
uint32_t prng = 42;
for (lfs_size_t i = 0; i < FROM; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, FROM) => FROM;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// fruncate to new size
lfsr_file_fruncate(&lfs, &file, TO) => 0;
if (TO > FROM) {
memmove(sim+TO-FROM, sim, FROM);
memset(sim, 0, TO-FROM);
} else if (TO < FROM) {
memmove(sim, sim+FROM-TO, TO);
memset(sim+TO, 0, FROM-TO);
}
// close
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == TO);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == TO);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => TO;
// try reading
uint8_t rbuf[2*TO];
memset(rbuf, 0xaa, 2*TO);
lfsr_file_read(&lfs, &file, rbuf, 2*TO) => TO;
assert(memcmp(rbuf, sim, TO) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# one purpose of this test is to check that data is not hidden
# and then revealed by fruncate, that would be bad
[cases.test_fwrite_fruncate_2]
defines.FROM = [
'0',
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.AND = [
'0',
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.TO = [
'0',
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
if = [
# these just save testing time
'FROM / FRAGMENT_SIZE <= 4096',
'AND / FRAGMENT_SIZE <= 4096',
'TO / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file, truncating in case of powerloss
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
// simulate our file in ram
uint8_t sim[lfs_max32(FROM,lfs_max32(AND,TO))];
memset(sim, 0, lfs_max32(FROM,lfs_max32(AND,TO)));
uint32_t prng = 42;
for (lfs_size_t i = 0; i < FROM; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, FROM) => FROM;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// fruncate to intermediate size
lfsr_file_fruncate(&lfs, &file, AND) => 0;
if (AND > FROM) {
memmove(sim+AND-FROM, sim, FROM);
memset(sim, 0, AND-FROM);
} else if (AND < FROM) {
memmove(sim, sim+FROM-AND, AND);
memset(sim+AND, 0, FROM-AND);
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// fruncate to new size
lfsr_file_fruncate(&lfs, &file, TO) => 0;
if (TO > AND) {
memmove(sim+TO-AND, sim, AND);
memset(sim, 0, TO-AND);
} else if (TO < AND) {
memmove(sim, sim+AND-TO, TO);
memset(sim+TO, 0, AND-TO);
}
// close
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == TO);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == TO);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => TO;
// try reading
uint8_t rbuf[2*TO];
memset(rbuf, 0xaa, 2*TO);
lfsr_file_read(&lfs, &file, rbuf, 2*TO) => TO;
assert(memcmp(rbuf, sim, TO) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# writing any data structure backwards always reveals issues
[cases.test_fwrite_reversed]
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = [32, 8, 1]
# 0 => no init
# 1 => fill with data
# 2 => truncate to size
defines.INIT = [0, 1, 2]
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
if = [
'CHUNK <= SIZE',
# this just save testing time
'SIZE / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file, truncating in case of powerloss
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
uint32_t prng = 42;
if (INIT == 0) {
memset(sim, 0, SIZE);
} else if (INIT == 1) {
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
} else if (INIT == 2) {
memset(sim, 0, SIZE);
lfsr_file_truncate(&lfs, &file, SIZE) => 0;
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// write to file incrementally and backwards
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
for (lfs_size_t j = 0; j < CHUNK; j++) {
sim[SIZE-i-CHUNK+j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE-i-CHUNK, LFS_SEEK_SET) => SIZE-i-CHUNK;
lfsr_file_write(&lfs, &file, &sim[SIZE-i-CHUNK], CHUNK) => CHUNK;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
}
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => SIZE;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => SIZE;
// does our file match our simulation?
assert(memcmp(rbuf, sim, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# these are like the overwrite/hole tests, but with enough rewrites to
# trigger compaction
[cases.test_fwrite_overwrite_compaction]
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = [32, 8, 1]
# bit 0 => first chunk
# bit 1 => middle chunk
# bit 2 => last chunk
defines.MASK = [0, 1, 2, 3, 4, 5, 6, 7]
# 0 => in-order
# 1 => reversed
defines.ORDER = [0, 1]
# writing this many times guarantees a compaction
defines.WRITES = '2*(BLOCK_SIZE/PROG_SIZE)'
# TODO is setting PROG_SIZE here reasonable?
defines.PROG_SIZE = 64
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
if = [
'CHUNK <= SIZE',
# this just save testing time
'SIZE / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file, truncating in case of powerloss
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
uint32_t prng = 42;
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// write first chunk?
if (MASK & 0x1) {
for (lfs_size_t w = 0; w < WRITES; w++) {
if (ORDER == 0) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfsr_file_write(&lfs, &file, &sim[0], CHUNK) => CHUNK;
} else {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE-CHUNK+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE-CHUNK, LFS_SEEK_SET) => SIZE-CHUNK;
lfsr_file_write(&lfs, &file, &sim[SIZE-CHUNK], CHUNK) => CHUNK;
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
}
}
// write second chunk?
if (MASK & 0x2) {
for (lfs_size_t w = 0; w < WRITES; w++) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE/2-CHUNK/2+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE/2 - CHUNK/2, LFS_SEEK_SET)
=> SIZE/2 - CHUNK/2;
lfsr_file_write(&lfs, &file, &sim[SIZE/2-CHUNK/2], CHUNK) => CHUNK;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
}
}
// write third chunk?
if (MASK & 0x4) {
for (lfs_size_t w = 0; w < WRITES; w++) {
if (ORDER == 0) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE-CHUNK+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE-CHUNK, LFS_SEEK_SET) => SIZE-CHUNK;
lfsr_file_write(&lfs, &file, &sim[SIZE-CHUNK], CHUNK) => CHUNK;
} else {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfsr_file_write(&lfs, &file, &sim[0], CHUNK) => CHUNK;
}
}
}
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => SIZE;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => SIZE;
// does our file match our simulation?
assert(memcmp(rbuf, sim, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
[cases.test_fwrite_hole_compaction]
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = [32, 8, 1]
# bit 0 => first chunk
# bit 1 => middle chunk
# bit 2 => last chunk
defines.MASK = [0, 1, 2, 3, 4, 5, 6, 7]
# 0 => in-order
# 1 => reversed
defines.ORDER = [0, 1]
# writing this many times guarantees a compaction
defines.WRITES = '2*(BLOCK_SIZE/PROG_SIZE)'
# TODO is setting PROG_SIZE here reasonable?
defines.PROG_SIZE = 64
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
if = [
'CHUNK <= SIZE',
# this just save testing time
'SIZE / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file, truncating in case of powerloss
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
uint32_t prng = 42;
memset(sim, 0, SIZE);
// we may not write the entire file
lfs_off_t size
= (MASK & ((ORDER == 0) ? 0x4 : 0x1)) ? SIZE
: (MASK & ((ORDER == 0) ? 0x2 : 0x2)) ? SIZE/2 + (CHUNK+2-1)/2
: (MASK & ((ORDER == 0) ? 0x1 : 0x4)) ? CHUNK
: 0;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// write first chunk?
if (MASK & 0x1) {
for (lfs_size_t w = 0; w < WRITES; w++) {
if (ORDER == 0) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfsr_file_write(&lfs, &file, &sim[0], CHUNK) => CHUNK;
} else {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE-CHUNK+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE-CHUNK, LFS_SEEK_SET) => SIZE-CHUNK;
lfsr_file_write(&lfs, &file, &sim[SIZE-CHUNK], CHUNK) => CHUNK;
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
}
}
// write second chunk?
if (MASK & 0x2) {
for (lfs_size_t w = 0; w < WRITES; w++) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE/2-CHUNK/2+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE/2 - CHUNK/2, LFS_SEEK_SET)
=> SIZE/2 - CHUNK/2;
lfsr_file_write(&lfs, &file, &sim[SIZE/2-CHUNK/2], CHUNK) => CHUNK;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
}
}
// write third chunk?
if (MASK & 0x4) {
for (lfs_size_t w = 0; w < WRITES; w++) {
if (ORDER == 0) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE-CHUNK+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE-CHUNK, LFS_SEEK_SET) => SIZE-CHUNK;
lfsr_file_write(&lfs, &file, &sim[SIZE-CHUNK], CHUNK) => CHUNK;
} else {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfsr_file_write(&lfs, &file, &sim[0], CHUNK) => CHUNK;
}
}
}
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => size;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => size;
// does our file match our simulation?
assert(memcmp(rbuf, sim, size) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# fuzz testing
[cases.test_fwrite_fuzz_aligned]
defines.N = 20
defines.SEED = 'range(10)'
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = [32, 8, 1]
# 0 => no init
# 1 => fill with data
# 2 => truncate to size
defines.INIT = [0, 1, 2]
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
if = [
'CHUNK <= SIZE',
# this just save testing time
'SIZE / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
lfs_off_t size;
uint32_t prng = SEED;
if (INIT == 0) {
memset(sim, 0, SIZE);
size = 0;
} else if (INIT == 1) {
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
size = SIZE;
} else if (INIT == 2) {
memset(sim, 0, SIZE);
lfsr_file_truncate(&lfs, &file, SIZE) => 0;
size = SIZE;
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
for (lfs_size_t i = 0; i < N; i++) {
// choose a random chunk-aligned location
lfs_off_t off = (TEST_PRNG(&prng) % (SIZE/CHUNK)) * CHUNK;
// update sim
for (lfs_size_t j = 0; j < CHUNK; j++) {
sim[off+j] = 'a' + (TEST_PRNG(&prng) % 26);
}
size = lfs_max32(size, off+CHUNK);
// update file
lfsr_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
lfsr_file_write(&lfs, &file, &sim[off], CHUNK) => CHUNK;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
}
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => size;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => size;
// does our file match our simulation?
assert(memcmp(rbuf, sim, size) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# fuzz testing
[cases.test_fwrite_fuzz_unaligned]
defines.N = 20
defines.SEED = 'range(10)'
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
# chunk is more an upper limit here
defines.CHUNK = [32, 8]
# 0 => no init
# 1 => fill with data
# 2 => truncate to size
defines.INIT = [0, 1, 2]
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
if = [
'CHUNK <= SIZE',
# this just save testing time
'SIZE / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
lfs_off_t size;
uint32_t prng = SEED;
if (INIT == 0) {
memset(sim, 0, SIZE);
size = 0;
} else if (INIT == 1) {
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
size = SIZE;
} else if (INIT == 2) {
memset(sim, 0, SIZE);
lfsr_file_truncate(&lfs, &file, SIZE) => 0;
size = SIZE;
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
for (lfs_size_t i = 0; i < N; i++) {
// choose a random location
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
// and a random size, up to the chunk size
lfs_size_t chunk = lfs_min32(
TEST_PRNG(&prng) % CHUNK,
SIZE - off);
// update sim
for (lfs_size_t j = 0; j < chunk; j++) {
sim[off+j] = 'a' + (TEST_PRNG(&prng) % 26);
}
if (chunk != 0) {
size = lfs_max32(size, off+chunk);
}
// update file
lfsr_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
lfsr_file_write(&lfs, &file, &sim[off], chunk) => chunk;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
}
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => size;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => size;
// does our file match our simulation?
assert(memcmp(rbuf, sim, size) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# more seek testing
[cases.test_fwrite_r_seek]
defines.N = 20
defines.SEED = 'range(10)'
defines.WHENCE = ['LFS_SEEK_SET', 'LFS_SEEK_CUR', 'LFS_SEEK_END']
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
# chunk is more an upper limit here
defines.CHUNK = [32, 8]
if = [
'CHUNK <= SIZE',
# this just save testing time
'SIZE / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
uint32_t prng = SEED;
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
lfs_soff_t off_ = 0;
for (lfs_size_t i = 0; i < N; i++) {
// choose a random location
lfs_soff_t off = TEST_PRNG(&prng) % SIZE;
// and a random size, up to the chunk size
lfs_size_t chunk = lfs_min32(
TEST_PRNG(&prng) % CHUNK,
SIZE - off);
// test different seek methods
if (WHENCE == LFS_SEEK_SET) {
lfsr_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
} else if (WHENCE == LFS_SEEK_CUR) {
lfsr_file_seek(&lfs, &file, off-off_, LFS_SEEK_CUR) => off;
} else if (WHENCE == LFS_SEEK_END) {
lfsr_file_seek(&lfs, &file, off-SIZE, LFS_SEEK_END) => off;
}
// tell should always report the correct position
lfsr_file_tell(&lfs, &file) => off;
// read the file and assert we got the correct data
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, chunk) => chunk;
assert(memcmp(rbuf, &sim[off], chunk) == 0);
// tell should report the new position
lfsr_file_tell(&lfs, &file) => off + chunk;
// keep track of previous off for LFS_SEEK_CUR
off_ = off + chunk;
}
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# this is pretty much the same as earlier fuzz testing, except we test
# different seek methods
[cases.test_fwrite_w_seek]
defines.N = 10
defines.SEED = 'range(10)'
defines.WHENCE = ['LFS_SEEK_SET', 'LFS_SEEK_CUR', 'LFS_SEEK_END']
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
# chunk is more an upper limit here
defines.CHUNK = [32, 8]
# 0 => no init
# 1 => fill with data
# 2 => truncate to size
defines.INIT = [0, 1, 2]
defines.SYNC = [false, true]
if = [
'CHUNK <= SIZE',
# this just save testing time
'SIZE / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
lfs_off_t size;
uint32_t prng = SEED;
if (INIT == 0) {
memset(sim, 0, SIZE);
size = 0;
} else if (INIT == 1) {
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
size = SIZE;
} else if (INIT == 2) {
memset(sim, 0, SIZE);
lfsr_file_truncate(&lfs, &file, SIZE) => 0;
size = SIZE;
}
lfsr_file_close(&lfs, &file) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
lfs_soff_t off_ = 0;
for (lfs_size_t i = 0; i < N; i++) {
// choose a random location
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
// and a random size, up to the chunk size
lfs_size_t chunk = lfs_min32(
TEST_PRNG(&prng) % CHUNK,
SIZE - off);
// test different seek methods
if (WHENCE == LFS_SEEK_SET) {
lfsr_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
} else if (WHENCE == LFS_SEEK_CUR) {
lfsr_file_seek(&lfs, &file, off-off_, LFS_SEEK_CUR) => off;
} else if (WHENCE == LFS_SEEK_END) {
lfsr_file_seek(&lfs, &file, off-size, LFS_SEEK_END) => off;
}
// tell should always report the correct position
lfsr_file_tell(&lfs, &file) => off;
// update the sim
for (lfs_size_t j = 0; j < chunk; j++) {
sim[off+j] = 'a' + (TEST_PRNG(&prng) % 26);
}
if (chunk != 0) {
size = lfs_max32(size, off+chunk);
}
// update the file
lfsr_file_write(&lfs, &file, &sim[off], chunk) => chunk;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// tell should report the new position
lfsr_file_tell(&lfs, &file) => off + chunk;
// keep track of previous off for LFS_SEEK_CUR
off_ = off + chunk;
}
lfsr_file_close(&lfs, &file) => 0;
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => size;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => size;
// does our file match our simulation?
assert(memcmp(rbuf, sim, size) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# the above was just warmup, here's the real seek test
[cases.test_fwrite_rw_seek]
defines.N = 10
defines.SEED = 'range(10)'
defines.WHENCE = ['LFS_SEEK_SET', 'LFS_SEEK_CUR', 'LFS_SEEK_END']
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
# chunk is more an upper limit here
defines.CHUNK = [32, 8]
# 0 => no init
# 1 => fill with data
# 2 => truncate to size
defines.INIT = [0, 1, 2]
defines.SYNC = [false, true]
if = [
'CHUNK <= SIZE',
# this just save testing time
'SIZE / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
lfs_off_t size;
uint32_t prng = SEED;
if (INIT == 0) {
memset(sim, 0, SIZE);
size = 0;
} else if (INIT == 1) {
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
size = SIZE;
} else if (INIT == 2) {
memset(sim, 0, SIZE);
lfsr_file_truncate(&lfs, &file, SIZE) => 0;
size = SIZE;
}
lfsr_file_close(&lfs, &file) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDWR) => 0;
lfs_soff_t off_ = 0;
for (lfs_size_t i = 0; i < N; i++) {
// choose a random location
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
// and a random size, up to the chunk size
lfs_size_t chunk = lfs_min32(
TEST_PRNG(&prng) % CHUNK,
SIZE - off);
// and if we are reading or writing
uint8_t op = TEST_PRNG(&prng) % 2;
// test different seek methods
if (WHENCE == LFS_SEEK_SET) {
lfsr_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
} else if (WHENCE == LFS_SEEK_CUR) {
lfsr_file_seek(&lfs, &file, off-off_, LFS_SEEK_CUR) => off;
} else if (WHENCE == LFS_SEEK_END) {
lfsr_file_seek(&lfs, &file, off-size, LFS_SEEK_END) => off;
}
// tell should always report the correct position
lfsr_file_tell(&lfs, &file) => off;
// writing?
if (op == 0) {
// update the sim
for (lfs_size_t j = 0; j < chunk; j++) {
sim[off+j] = 'a' + (TEST_PRNG(&prng) % 26);
}
if (chunk != 0) {
size = lfs_max32(size, off+chunk);
}
// update the file
lfsr_file_write(&lfs, &file, &sim[off], chunk) => chunk;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// tell should report the new position
lfsr_file_tell(&lfs, &file) => off + chunk;
// keep track of previous off for LFS_SEEK_CUR
off_ = off + chunk;
// reading?
} else if (op == 1) {
// we may read less than chunk if we're past eof
lfs_off_t expected = lfs_min32(
chunk,
size - lfs_min32(off, size));
// read the file and assert we got the correct data
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, chunk) => expected;
assert(memcmp(rbuf, &sim[off], expected) == 0);
// tell should report the new position
lfsr_file_tell(&lfs, &file) => off + expected;
// keep track of previous off for LFS_SEEK_CUR
off_ = off + expected;
}
}
lfsr_file_close(&lfs, &file) => 0;
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => size;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => size;
// does our file match our simulation?
assert(memcmp(rbuf, sim, size) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# test other corner conditions
[cases.test_fwrite_seek_negative]
defines.WHENCE = ['LFS_SEEK_SET', 'LFS_SEEK_CUR', 'LFS_SEEK_END']
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
# 0 => no init
# 1 => fill with data
# 2 => truncate to size
defines.INIT = [0, 1, 2]
defines.MODE = ['LFS_O_RDONLY', 'LFS_O_WRONLY', 'LFS_O_RDWR']
if = [
# this just save testing time
'SIZE / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
lfs_off_t size;
uint32_t prng = 42;
if (INIT == 0) {
memset(sim, 0, SIZE);
size = 0;
} else if (INIT == 1) {
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
size = SIZE;
} else if (INIT == 2) {
memset(sim, 0, SIZE);
lfsr_file_truncate(&lfs, &file, SIZE) => 0;
size = SIZE;
}
lfsr_file_close(&lfs, &file) => 0;
// try to seek before the beginning of the file, this should fail
lfsr_file_open(&lfs, &file, "hello", MODE) => 0;
if (WHENCE == LFS_SEEK_SET) {
lfsr_file_seek(&lfs, &file, -1, LFS_SEEK_SET) => LFS_ERR_INVAL;
} else if (WHENCE == LFS_SEEK_CUR) {
lfsr_file_seek(&lfs, &file, -1, LFS_SEEK_CUR) => LFS_ERR_INVAL;
} else if (WHENCE == LFS_SEEK_END) {
lfsr_file_seek(&lfs, &file, -(size+1), LFS_SEEK_END) => LFS_ERR_INVAL;
}
lfsr_file_close(&lfs, &file) => 0;
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => size;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => size;
// does our file match our simulation?
assert(memcmp(rbuf, sim, size) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# heavy fuzz test with rw seeks, truncate, and fruncate
[cases.test_fwrite_rwtf_fuzz]
defines.N = 20
defines.SEED = 'range(10)'
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
# chunk is more an upper limit here
defines.CHUNK = [32, 8]
# 0 => no init
# 1 => fill with data
# 2 => truncate to size
defines.INIT = [0, 1, 2]
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
if = [
'CHUNK <= SIZE',
# this just save testing time
'SIZE / FRAGMENT_SIZE <= 4096',
]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_RDWR | LFS_O_CREAT | LFS_O_EXCL) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
lfs_off_t size;
uint32_t prng = SEED;
if (INIT == 0) {
memset(sim, 0, SIZE);
size = 0;
} else if (INIT == 1) {
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
size = SIZE;
} else if (INIT == 2) {
memset(sim, 0, SIZE);
lfsr_file_truncate(&lfs, &file, SIZE) => 0;
size = SIZE;
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDWR) => 0;
}
for (lfs_size_t i = 0; i < N; i++) {
// and if we are reading, writing, truncating, or fruncating
uint8_t op = TEST_PRNG(&prng) % 4;
// writing?
if (op == 0) {
// choose a random location
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
// and a random size, up to the chunk size
lfs_size_t chunk = lfs_min32(
TEST_PRNG(&prng) % CHUNK,
SIZE - off);
// seek
lfsr_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
// update the sim
for (lfs_size_t j = 0; j < chunk; j++) {
sim[off+j] = 'a' + (TEST_PRNG(&prng) % 26);
}
if (chunk != 0) {
size = lfs_max32(size, off+chunk);
}
// update the file
lfsr_file_write(&lfs, &file, &sim[off], chunk) => chunk;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDWR) => 0;
}
// reading?
} else if (op == 1) {
// choose a random location
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
// and a random size, up to the chunk size
lfs_size_t chunk = lfs_min32(
TEST_PRNG(&prng) % CHUNK,
SIZE - off);
// seek
lfsr_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
// we may read less than chunk if we're past eof
lfs_off_t expected = lfs_min32(
chunk,
size - lfs_min32(off, size));
// read the file and assert we got the correct data
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, chunk) => expected;
assert(memcmp(rbuf, &sim[off], expected) == 0);
// truncating?
} else if (op == 2) {
// choose a random new file size
lfs_off_t size_ = TEST_PRNG(&prng) % SIZE;
// update the sim
if (size_ < size) {
memset(sim+size_, 0, size-size_);
}
size = size_;
// truncate the file
lfsr_file_truncate(&lfs, &file, size_) => 0;
} else if (op == 3) {
// choose a random new file size
lfs_off_t size_ = TEST_PRNG(&prng) % SIZE;
// update the sim
if (size_ > size) {
memmove(sim+size_-size, sim, size);
memset(sim, 0, size_-size);
} else if (size_ < size) {
memmove(sim, sim+size-size_, size_);
memset(sim+size_, 0, size-size_);
}
size = size_;
// truncate the file
lfsr_file_fruncate(&lfs, &file, size_) => 0;
}
}
lfsr_file_close(&lfs, &file) => 0;
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => size;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => size;
// does our file match our simulation?
assert(memcmp(rbuf, sim, size) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# TODO
# [cases.test_fwrite_push] ?
# [cases.test_fwrite_pop] ?
# [cases.test_fwrite_rwtfpp_fuzz] ?
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