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b336e92c66bb8ce72ad332897d96d0abecc0f328
littlefs/tests/test_fmulti.toml
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Christopher Haster b336e92c66 Exposed lfsr_file_flush, LFS_O_FLUSH, for manually flushing buffers 
A recent change, motivated by user feedback, was to delay write buffer
flushes as much as possible. Before, littlefs would always flush the
buffer during lfs_file_seek, but now, buffer flushes can be delayed all
the way to lfsr_file_read, or even skipped entirely thanks to bypassing
reads.

This is all fine and dandy, except it's easy to imagine a use case where
a user might really not want a _write_ error to pop out of a _read_
call.

With this new behavior, avoiding this situation is impossible.

So enters a function common to other filesystems: lfsr_file_flush.

However it's value is quite a bit different here. Unlike flush in other
filesystems, this flush does not necessarily make data accessible on
disk. It only writes to the pending file snapshot, which is not
accessible until lfsr_file_sync.

This makes flush a function with a rather narrow scope in littlefs
(pretty much just preventing write errors in read), but since we had
already implemented this function for internal plumbing, it adds _very_
little cost.

I'm more concerned about potential user confusion around sync vs flush.

Curiously, exposing lfsr_file_flush actually _saved_ code size for some
reason. Not sure what would make that happen:

                   code          stack
  before:         33544           3072
  flush:          33536 (-0.0%)   3072 (+0.0%)
  flush+O_FLUSH:  33548 (+0.0%)   3072 (+0.0%)
2024-02-03 18:14:54 -06:00

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# Test multiple open file handles in different r/w configurations
after = 'test_fwrite'
# Test multiple readers, this shouldn't really have any issues
[cases.test_fmulti_rrrr]
defines.R = 4
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = 42;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// read R handles in parallel
lfsr_file_t readers[R];
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_open(&lfs, &readers[r], "jello", LFS_O_RDONLY) => 0;
}
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
for (lfs_size_t r = 0; r < R; r++) {
uint8_t rbuf[CHUNK];
lfsr_file_read(&lfs, &readers[r], rbuf, CHUNK) => CHUNK;
assert(memcmp(rbuf, &before[i], CHUNK) == 0);
}
}
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_close(&lfs, &readers[r]) => 0;
}
lfsr_unmount(&lfs) => 0;
'''
[cases.test_fmulti_rrrr_fuzz]
defines.R = 4
defines.SEED = 'range(10)'
defines.N = 20
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = SEED;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// read R handles in parallel
lfsr_file_t readers[R];
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_open(&lfs, &readers[r], "jello", LFS_O_RDONLY) => 0;
}
for (lfs_size_t i = 0; i < N; i++) {
for (lfs_size_t r = 0; r < R; r++) {
// choose a random offset
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
lfs_size_t size = lfs_min32(CHUNK, SIZE - off);
lfsr_file_seek(&lfs, &readers[r], off, LFS_SEEK_SET) => off;
// read
uint8_t rbuf[CHUNK];
lfsr_file_read(&lfs, &readers[r], rbuf, CHUNK) => size;
assert(memcmp(rbuf, &before[off], size) == 0);
}
}
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_close(&lfs, &readers[r]) => 0;
}
lfsr_unmount(&lfs) => 0;
'''
# Test one writer, multiple readers
[cases.test_fmulti_wrrr]
defines.R = 4
# 0 => no sync, readers not updated
# 1 => sync via lfsr_file_sync
# 2 => sync via LFS_O_SYNC
defines.SYNC = [0, 1, 2]
# 0 => no flush
# 1 => flush via lfsr_file_flush
# 2 => flush via LFS_O_FLUSH
defines.FLUSH = [0, 1, 2]
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = 42;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
uint8_t after[SIZE];
memcpy(after, before, SIZE);
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// write 1 handle, read R handles in parallel
lfsr_file_t writer;
lfsr_file_t readers[R];
lfsr_file_open(&lfs, &writer, "jello",
LFS_O_WRONLY
| ((FLUSH == 2) ? LFS_O_FLUSH : 0)
| ((SYNC == 2) ? LFS_O_SYNC : 0)) => 0;
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_open(&lfs, &readers[r], "jello", LFS_O_RDONLY) => 0;
}
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
uint8_t wbuf[CHUNK];
for (lfs_size_t j = 0; j < CHUNK; j++) {
wbuf[j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &writer, wbuf, CHUNK) => CHUNK;
memcpy(&after[i], wbuf, CHUNK);
if (FLUSH == 1) {
lfsr_file_flush(&lfs, &writer) => 0;
}
if (SYNC == 1) {
lfsr_file_sync(&lfs, &writer) => 0;
}
for (lfs_size_t r = 0; r < R; r++) {
uint8_t rbuf[CHUNK];
lfsr_file_read(&lfs, &readers[r], rbuf, CHUNK) => CHUNK;
if (SYNC == 0) {
assert(memcmp(rbuf, &before[i], CHUNK) == 0);
} else {
assert(memcmp(rbuf, &after[i], CHUNK) == 0);
}
}
}
lfsr_file_close(&lfs, &writer) => 0;
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_close(&lfs, &readers[r]) => 0;
}
// check that file was written as expected
lfsr_file_open(&lfs, &file, "jello", LFS_O_RDONLY) => 0;
uint8_t rbuf[SIZE];
lfsr_file_read(&lfs, &file, rbuf, SIZE) => SIZE;
assert(memcmp(rbuf, after, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
[cases.test_fmulti_wrrr_fuzz]
defines.R = 4
# 0 => no sync, readers not updated
# 1 => sync via lfsr_file_sync
# 2 => sync via LFS_O_SYNC
defines.SYNC = [0, 1, 2]
# 0 => no flush
# 1 => flush via lfsr_file_flush
# 2 => flush via LFS_O_FLUSH
defines.FLUSH = [0, 1, 2]
defines.SEED = 'range(10)'
defines.N = 20
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = 42;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
uint8_t after[SIZE];
memcpy(after, before, SIZE);
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// write 1 handle, read R handles in parallel
lfsr_file_t writer;
lfsr_file_t readers[R];
lfsr_file_open(&lfs, &writer, "jello",
LFS_O_WRONLY
| ((FLUSH == 2) ? LFS_O_FLUSH : 0)
| ((SYNC == 2) ? LFS_O_SYNC : 0)) => 0;
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_open(&lfs, &readers[r], "jello", LFS_O_RDONLY) => 0;
}
for (lfs_size_t i = 0; i < N; i++) {
// choose a random offset
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
lfs_size_t size = lfs_min32(CHUNK, SIZE - off);
lfsr_file_seek(&lfs, &writer, off, LFS_SEEK_SET) => off;
// write
uint8_t wbuf[CHUNK];
for (lfs_size_t j = 0; j < size; j++) {
wbuf[j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &writer, wbuf, size) => size;
memcpy(&after[off], wbuf, size);
if (FLUSH == 1) {
lfsr_file_flush(&lfs, &writer) => 0;
}
if (SYNC == 1) {
lfsr_file_sync(&lfs, &writer) => 0;
}
for (lfs_size_t r = 0; r < R; r++) {
// choose a random offset
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
lfs_size_t size = lfs_min32(CHUNK, SIZE - off);
lfsr_file_seek(&lfs, &readers[r], off, LFS_SEEK_SET) => off;
// read
uint8_t rbuf[CHUNK];
lfsr_file_read(&lfs, &readers[r], rbuf, CHUNK) => size;
if (SYNC == 0) {
assert(memcmp(rbuf, &before[off], size) == 0);
} else {
assert(memcmp(rbuf, &after[off], size) == 0);
}
}
}
lfsr_file_close(&lfs, &writer) => 0;
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_close(&lfs, &readers[r]) => 0;
}
// check that file was written as expected
lfsr_file_open(&lfs, &file, "jello", LFS_O_RDONLY) => 0;
uint8_t rbuf[SIZE];
lfsr_file_read(&lfs, &file, rbuf, SIZE) => SIZE;
assert(memcmp(rbuf, after, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# Test multiple writers
[cases.test_fmulti_wwww]
defines.W = 4
# 0 => no sync, readers not updated
# 1 => sync via lfsr_file_sync
# 2 => sync via LFS_O_SYNC
defines.SYNC = [0, 1, 2]
# 0 => no flush
# 1 => flush via lfsr_file_flush
# 2 => flush via LFS_O_FLUSH
defines.FLUSH = [0, 1, 2]
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = 42;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
uint8_t after[SIZE];
memcpy(after, before, SIZE);
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// write W handles in parallel
lfsr_file_t writers[W];
for (lfs_size_t w = 0; w < W; w++) {
lfsr_file_open(&lfs, &writers[w], "jello",
LFS_O_WRONLY
| ((FLUSH == 2) ? LFS_O_FLUSH : 0)
| ((SYNC == 2) ? LFS_O_SYNC : 0)) => 0;
}
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
for (lfs_size_t w = 0; w < W; w++) {
uint8_t wbuf[CHUNK];
for (lfs_size_t j = 0; j < CHUNK; j++) {
wbuf[j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &writers[w], wbuf, CHUNK) => CHUNK;
if (SYNC == 0) {
if (w == 0) {
memcpy(&after[i], wbuf, CHUNK);
}
} else {
if (FLUSH == 1) {
lfsr_file_flush(&lfs, &writers[w]) => 0;
}
if (SYNC == 1) {
lfsr_file_sync(&lfs, &writers[w]) => 0;
}
memcpy(&after[i], wbuf, CHUNK);
}
}
}
for (lfs_size_t w = 0; w < W; w++) {
lfsr_file_close(&lfs, &writers[w]) => 0;
}
// check that file was written as expected
lfsr_file_open(&lfs, &file, "jello", LFS_O_RDONLY) => 0;
uint8_t rbuf[SIZE];
lfsr_file_read(&lfs, &file, rbuf, SIZE) => SIZE;
assert(memcmp(rbuf, after, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
[cases.test_fmulti_wwww_fuzz]
defines.W = 4
# 0 => no sync, readers not updated
# 1 => sync via lfsr_file_sync
# 2 => sync via LFS_O_SYNC
defines.SYNC = [0, 1, 2]
# 0 => no flush
# 1 => flush via lfsr_file_flush
# 2 => flush via LFS_O_FLUSH
defines.FLUSH = [0, 1, 2]
defines.SEED = 'range(10)'
defines.N = 20
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = 42;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
uint8_t after[SIZE];
memcpy(after, before, SIZE);
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// write W files in parallel
lfsr_file_t writers[W];
for (lfs_size_t w = 0; w < W; w++) {
lfsr_file_open(&lfs, &writers[w], "jello",
LFS_O_WRONLY
| ((FLUSH == 2) ? LFS_O_FLUSH : 0)
| ((SYNC == 2) ? LFS_O_SYNC : 0)) => 0;
}
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
for (lfs_size_t w = 0; w < W; w++) {
// choose a random offset
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
lfs_size_t size = lfs_min32(CHUNK, SIZE - off);
lfsr_file_seek(&lfs, &writers[w], off, LFS_SEEK_SET) => off;
// write
uint8_t wbuf[CHUNK];
for (lfs_size_t j = 0; j < size; j++) {
wbuf[j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &writers[w], wbuf, size) => size;
if (SYNC == 0) {
if (w == 0) {
memcpy(&after[off], wbuf, size);
}
} else {
if (FLUSH == 1) {
lfsr_file_flush(&lfs, &writers[w]) => 0;
}
if (SYNC == 1) {
lfsr_file_sync(&lfs, &writers[w]) => 0;
}
memcpy(&after[off], wbuf, size);
}
}
}
for (lfs_size_t w = 0; w < W; w++) {
lfsr_file_close(&lfs, &writers[w]) => 0;
}
// check that file was written as expected
lfsr_file_open(&lfs, &file, "jello", LFS_O_RDONLY) => 0;
uint8_t rbuf[SIZE];
lfsr_file_read(&lfs, &file, rbuf, SIZE) => SIZE;
assert(memcmp(rbuf, after, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# Test multiple writers and multiple readers
[cases.test_fmulti_wwrr]
defines.W = 4
defines.R = 4
# 0 => no sync, readers not updated
# 1 => sync via lfsr_file_sync
# 2 => sync via LFS_O_SYNC
defines.SYNC = [0, 1, 2]
# 0 => no flush
# 1 => flush via lfsr_file_flush
# 2 => flush via LFS_O_FLUSH
defines.FLUSH = [0, 1, 2]
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = 42;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
uint8_t after[SIZE];
memcpy(after, before, SIZE);
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// write W handles, R handles in parallel
lfsr_file_t writers[W];
lfsr_file_t readers[R];
for (lfs_size_t w = 0; w < W; w++) {
lfsr_file_open(&lfs, &writers[w], "jello",
LFS_O_WRONLY
| ((FLUSH == 2) ? LFS_O_FLUSH : 0)
| ((SYNC == 2) ? LFS_O_SYNC : 0)) => 0;
}
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_open(&lfs, &readers[r], "jello", LFS_O_RDONLY) => 0;
}
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
for (lfs_size_t w = 0; w < W; w++) {
uint8_t wbuf[CHUNK];
for (lfs_size_t j = 0; j < CHUNK; j++) {
wbuf[j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &writers[w], wbuf, CHUNK) => CHUNK;
if (SYNC == 0) {
if (w == 0) {
memcpy(&after[i], wbuf, CHUNK);
}
} else {
if (FLUSH == 1) {
lfsr_file_flush(&lfs, &writers[w]) => 0;
}
if (SYNC == 1) {
lfsr_file_sync(&lfs, &writers[w]) => 0;
}
memcpy(&after[i], wbuf, CHUNK);
}
}
for (lfs_size_t r = 0; r < R; r++) {
uint8_t rbuf[CHUNK];
lfsr_file_read(&lfs, &readers[r], rbuf, CHUNK) => CHUNK;
if (SYNC == 0) {
assert(memcmp(rbuf, &before[i], CHUNK) == 0);
} else {
assert(memcmp(rbuf, &after[i], CHUNK) == 0);
}
}
}
for (lfs_size_t w = 0; w < W; w++) {
lfsr_file_close(&lfs, &writers[w]) => 0;
}
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_close(&lfs, &readers[r]) => 0;
}
// check that file was written as expected
lfsr_file_open(&lfs, &file, "jello", LFS_O_RDONLY) => 0;
uint8_t rbuf[SIZE];
lfsr_file_read(&lfs, &file, rbuf, SIZE) => SIZE;
assert(memcmp(rbuf, after, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
[cases.test_fmulti_wwrr_fuzz]
defines.W = 4
defines.R = 4
# 0 => no sync, readers not updated
# 1 => sync via lfsr_file_sync
# 2 => sync via LFS_O_SYNC
defines.SYNC = [0, 1, 2]
# 0 => no flush
# 1 => flush via lfsr_file_flush
# 2 => flush via LFS_O_FLUSH
defines.FLUSH = [0, 1, 2]
defines.SEED = 'range(10)'
defines.N = 20
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = 42;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
uint8_t after[SIZE];
memcpy(after, before, SIZE);
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// write W files in parallel
lfsr_file_t writers[W];
lfsr_file_t readers[R];
for (lfs_size_t w = 0; w < W; w++) {
lfsr_file_open(&lfs, &writers[w], "jello",
LFS_O_WRONLY
| ((FLUSH == 2) ? LFS_O_FLUSH : 0)
| ((SYNC == 2) ? LFS_O_SYNC : 0)) => 0;
}
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_open(&lfs, &readers[r], "jello", LFS_O_RDONLY) => 0;
}
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
for (lfs_size_t w = 0; w < W; w++) {
// choose a random offset
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
lfs_size_t size = lfs_min32(CHUNK, SIZE - off);
lfsr_file_seek(&lfs, &writers[w], off, LFS_SEEK_SET) => off;
// write
uint8_t wbuf[CHUNK];
for (lfs_size_t j = 0; j < size; j++) {
wbuf[j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &writers[w], wbuf, size) => size;
if (SYNC == 0) {
if (w == 0) {
memcpy(&after[off], wbuf, size);
}
} else {
if (FLUSH == 1) {
lfsr_file_flush(&lfs, &writers[w]) => 0;
}
if (SYNC == 1) {
lfsr_file_sync(&lfs, &writers[w]) => 0;
}
memcpy(&after[off], wbuf, size);
}
}
for (lfs_size_t r = 0; r < R; r++) {
// choose a random offset
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
lfs_size_t size = lfs_min32(CHUNK, SIZE - off);
lfsr_file_seek(&lfs, &readers[r], off, LFS_SEEK_SET) => off;
// read
uint8_t rbuf[CHUNK];
lfsr_file_read(&lfs, &readers[r], rbuf, CHUNK) => size;
if (SYNC == 0) {
assert(memcmp(rbuf, &before[off], size) == 0);
} else {
assert(memcmp(rbuf, &after[off], size) == 0);
}
}
}
for (lfs_size_t w = 0; w < W; w++) {
lfsr_file_close(&lfs, &writers[w]) => 0;
}
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_close(&lfs, &readers[r]) => 0;
}
// check that file was written as expected
lfsr_file_open(&lfs, &file, "jello", LFS_O_RDONLY) => 0;
uint8_t rbuf[SIZE];
lfsr_file_read(&lfs, &file, rbuf, SIZE) => SIZE;
assert(memcmp(rbuf, after, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# Test multiple rd/wrers
[cases.test_fmulti_rwrw]
defines.RW = 4
# 0 => no sync, readers not updated
# 1 => sync via lfsr_file_sync
# 2 => sync via LFS_O_SYNC
defines.SYNC = [0, 1, 2]
# 0 => no flush
# 1 => flush via lfsr_file_flush
# 2 => flush via LFS_O_FLUSH
defines.FLUSH = [0, 1, 2]
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = 42;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
uint8_t between[RW][SIZE];
for (lfs_size_t rw = 0; rw < RW; rw++) {
memcpy(between[rw], before, SIZE);
}
uint8_t after[SIZE];
memcpy(after, before, SIZE);
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// write RW rdwrs in parallel
lfsr_file_t rdwrs[RW];
for (lfs_size_t rw = 0; rw < RW; rw++) {
lfsr_file_open(&lfs, &rdwrs[rw], "jello",
LFS_O_RDWR
| ((FLUSH == 2) ? LFS_O_FLUSH : 0)
| ((SYNC == 2) ? LFS_O_SYNC : 0)) => 0;
}
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
for (lfs_size_t rw = 0; rw < RW; rw++) {
uint8_t wbuf[CHUNK];
for (lfs_size_t j = 0; j < CHUNK; j++) {
wbuf[j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &rdwrs[rw], i, LFS_SEEK_SET) => i;
lfsr_file_write(&lfs, &rdwrs[rw], wbuf, CHUNK) => CHUNK;
memcpy(&between[rw][i], wbuf, CHUNK);
if (SYNC == 0) {
if (rw == 0) {
memcpy(&after[i], wbuf, CHUNK);
}
} else {
if (FLUSH == 1) {
lfsr_file_flush(&lfs, &rdwrs[rw]) => 0;
}
if (SYNC == 1) {
lfsr_file_sync(&lfs, &rdwrs[rw]) => 0;
}
memcpy(&after[i], wbuf, CHUNK);
}
}
for (lfs_size_t rw = 0; rw < RW; rw++) {
lfsr_file_seek(&lfs, &rdwrs[rw], i, LFS_SEEK_SET) => i;
uint8_t rbuf[CHUNK];
lfsr_file_read(&lfs, &rdwrs[rw], rbuf, CHUNK) => CHUNK;
if (SYNC == 0) {
assert(memcmp(rbuf, &between[rw][i], CHUNK) == 0);
} else {
assert(memcmp(rbuf, &after[i], CHUNK) == 0);
}
}
}
for (lfs_size_t rw = 0; rw < RW; rw++) {
lfsr_file_close(&lfs, &rdwrs[rw]) => 0;
}
// check that file was written as expected
lfsr_file_open(&lfs, &file, "jello", LFS_O_RDONLY) => 0;
uint8_t rbuf[SIZE];
lfsr_file_read(&lfs, &file, rbuf, SIZE) => SIZE;
assert(memcmp(rbuf, after, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
[cases.test_fmulti_rwrw_fuzz]
defines.RW = 4
# 0 => no sync, readers not updated
# 1 => sync via lfsr_file_sync
# 2 => sync via LFS_O_SYNC
defines.SYNC = [0, 1, 2]
# 0 => no flush
# 1 => flush via lfsr_file_flush
# 2 => flush via LFS_O_FLUSH
defines.FLUSH = [0, 1, 2]
defines.SEED = 'range(10)'
defines.N = 20
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = 42;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
uint8_t between[RW][SIZE];
for (lfs_size_t rw = 0; rw < RW; rw++) {
memcpy(between[rw], before, SIZE);
}
uint8_t after[SIZE];
memcpy(after, before, SIZE);
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// write RW rdwrs in parallel
lfsr_file_t rdwrs[RW];
for (lfs_size_t rw = 0; rw < RW; rw++) {
lfsr_file_open(&lfs, &rdwrs[rw], "jello",
LFS_O_RDWR
| ((FLUSH == 2) ? LFS_O_FLUSH : 0)
| ((SYNC == 2) ? LFS_O_SYNC : 0)) => 0;
}
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
for (lfs_size_t rw = 0; rw < RW; rw++) {
// choose a random offset
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
lfs_size_t size = lfs_min32(CHUNK, SIZE - off);
lfsr_file_seek(&lfs, &rdwrs[rw], off, LFS_SEEK_SET) => off;
// write
uint8_t wbuf[CHUNK];
for (lfs_size_t j = 0; j < size; j++) {
wbuf[j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &rdwrs[rw], wbuf, size) => size;
memcpy(&between[rw][off], wbuf, size);
if (SYNC == 0) {
if (rw == 0) {
memcpy(&after[off], wbuf, size);
}
} else {
if (FLUSH == 1) {
lfsr_file_flush(&lfs, &rdwrs[rw]) => 0;
}
if (SYNC == 1) {
lfsr_file_sync(&lfs, &rdwrs[rw]) => 0;
}
memcpy(&after[off], wbuf, size);
}
}
for (lfs_size_t rw = 0; rw < RW; rw++) {
// choose a random offset
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
lfs_size_t size = lfs_min32(CHUNK, SIZE - off);
lfsr_file_seek(&lfs, &rdwrs[rw], off, LFS_SEEK_SET) => off;
// read
uint8_t rbuf[CHUNK];
lfsr_file_read(&lfs, &rdwrs[rw], rbuf, CHUNK) => size;
if (SYNC == 0) {
assert(memcmp(rbuf, &between[rw][off], size) == 0);
} else {
assert(memcmp(rbuf, &after[off], size) == 0);
}
}
}
for (lfs_size_t rw = 0; rw < RW; rw++) {
lfsr_file_close(&lfs, &rdwrs[rw]) => 0;
}
// check that file was written as expected
lfsr_file_open(&lfs, &file, "jello", LFS_O_RDONLY) => 0;
uint8_t rbuf[SIZE];
lfsr_file_read(&lfs, &file, rbuf, SIZE) => SIZE;
assert(memcmp(rbuf, after, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# Desynced files make things interesting
# Test one desynced writer, multiple readers
[cases.test_fmulti_drrr]
defines.R = 4
# 0 => no sync, readers not updated
# 1 => sync via lfsr_file_sync
# 2 => sync via LFS_O_SYNC
defines.SYNC = [0, 1, 2]
# 0 => no flush
# 1 => flush via lfsr_file_flush
# 2 => flush via LFS_O_FLUSH
defines.FLUSH = [0, 1, 2]
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = 42;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
uint8_t after[SIZE];
memcpy(after, before, SIZE);
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// write 1 handle, read R handles in parallel
lfsr_file_t writer;
lfsr_file_t readers[R];
lfsr_file_open(&lfs, &writer, "jello",
LFS_O_WRONLY
| LFS_O_DESYNC
| ((FLUSH == 2) ? LFS_O_FLUSH : 0)
| ((SYNC == 2) ? LFS_O_SYNC : 0)) => 0;
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_open(&lfs, &readers[r], "jello", LFS_O_RDONLY) => 0;
}
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
uint8_t wbuf[CHUNK];
for (lfs_size_t j = 0; j < CHUNK; j++) {
wbuf[j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &writer, wbuf, CHUNK) => CHUNK;
memcpy(&after[i], wbuf, CHUNK);
if (FLUSH == 1) {
lfsr_file_flush(&lfs, &writer) => 0;
}
if (SYNC == 1) {
lfsr_file_sync(&lfs, &writer) => 0;
}
for (lfs_size_t r = 0; r < R; r++) {
uint8_t rbuf[CHUNK];
lfsr_file_read(&lfs, &readers[r], rbuf, CHUNK) => CHUNK;
if (SYNC == 0) {
assert(memcmp(rbuf, &before[i], CHUNK) == 0);
} else {
assert(memcmp(rbuf, &after[i], CHUNK) == 0);
}
}
}
lfsr_file_close(&lfs, &writer) => 0;
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_close(&lfs, &readers[r]) => 0;
}
// check that file was written as expected
lfsr_file_open(&lfs, &file, "jello", LFS_O_RDONLY) => 0;
uint8_t rbuf[SIZE];
lfsr_file_read(&lfs, &file, rbuf, SIZE) => SIZE;
if (SYNC == 0) {
assert(memcmp(rbuf, before, SIZE) == 0);
} else {
assert(memcmp(rbuf, after, SIZE) == 0);
}
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
[cases.test_fmulti_drrr_fuzz]
defines.R = 4
# 0 => no sync, readers not updated
# 1 => sync via lfsr_file_sync
# 2 => sync via LFS_O_SYNC
defines.SYNC = [0, 1, 2]
# 0 => no flush
# 1 => flush via lfsr_file_flush
# 2 => flush via LFS_O_FLUSH
defines.FLUSH = [0, 1, 2]
defines.SEED = 'range(10)'
defines.N = 20
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = 42;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
uint8_t after[SIZE];
memcpy(after, before, SIZE);
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// write 1 handle, read R handles in parallel
lfsr_file_t writer;
lfsr_file_t readers[R];
lfsr_file_open(&lfs, &writer, "jello",
LFS_O_WRONLY
| LFS_O_DESYNC
| ((FLUSH == 2) ? LFS_O_FLUSH : 0)
| ((SYNC == 2) ? LFS_O_SYNC : 0)) => 0;
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_open(&lfs, &readers[r], "jello", LFS_O_RDONLY) => 0;
}
for (lfs_size_t i = 0; i < N; i++) {
// choose a random offset
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
lfs_size_t size = lfs_min32(CHUNK, SIZE - off);
lfsr_file_seek(&lfs, &writer, off, LFS_SEEK_SET) => off;
// write
uint8_t wbuf[CHUNK];
for (lfs_size_t j = 0; j < size; j++) {
wbuf[j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &writer, wbuf, size) => size;
memcpy(&after[off], wbuf, size);
if (FLUSH == 1) {
lfsr_file_flush(&lfs, &writer) => 0;
}
if (SYNC == 1) {
lfsr_file_sync(&lfs, &writer) => 0;
}
for (lfs_size_t r = 0; r < R; r++) {
// choose a random offset
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
lfs_size_t size = lfs_min32(CHUNK, SIZE - off);
lfsr_file_seek(&lfs, &readers[r], off, LFS_SEEK_SET) => off;
// read
uint8_t rbuf[CHUNK];
lfsr_file_read(&lfs, &readers[r], rbuf, CHUNK) => size;
if (SYNC == 0) {
assert(memcmp(rbuf, &before[off], size) == 0);
} else {
assert(memcmp(rbuf, &after[off], size) == 0);
}
}
}
lfsr_file_close(&lfs, &writer) => 0;
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_close(&lfs, &readers[r]) => 0;
}
// check that file was written as expected
lfsr_file_open(&lfs, &file, "jello", LFS_O_RDONLY) => 0;
uint8_t rbuf[SIZE];
lfsr_file_read(&lfs, &file, rbuf, SIZE) => SIZE;
if (SYNC == 0) {
assert(memcmp(rbuf, before, SIZE) == 0);
} else {
assert(memcmp(rbuf, after, SIZE) == 0);
}
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# Test one writer, multiple desynced readers
[cases.test_fmulti_wddd]
defines.R = 4
# 0 => no sync, readers not updated
# 1 => sync via lfsr_file_sync
# 2 => sync via LFS_O_SYNC
defines.SYNC = [0, 1, 2]
# 0 => no flush
# 1 => flush via lfsr_file_flush
# 2 => flush via LFS_O_FLUSH
defines.FLUSH = [0, 1, 2]
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = 42;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
uint8_t after[SIZE];
memcpy(after, before, SIZE);
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// write 1 handle, read R handles in parallel
lfsr_file_t writer;
lfsr_file_t readers[R];
lfsr_file_open(&lfs, &writer, "jello",
LFS_O_WRONLY
| ((FLUSH == 2) ? LFS_O_FLUSH : 0)
| ((SYNC == 2) ? LFS_O_SYNC : 0)) => 0;
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_open(&lfs, &readers[r], "jello",
LFS_O_RDONLY | LFS_O_DESYNC) => 0;
}
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
uint8_t wbuf[CHUNK];
for (lfs_size_t j = 0; j < CHUNK; j++) {
wbuf[j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &writer, wbuf, CHUNK) => CHUNK;
memcpy(&after[i], wbuf, CHUNK);
if (FLUSH == 1) {
lfsr_file_flush(&lfs, &writer) => 0;
}
if (SYNC == 1) {
lfsr_file_sync(&lfs, &writer) => 0;
}
for (lfs_size_t r = 0; r < R; r++) {
uint8_t rbuf[CHUNK];
lfsr_file_read(&lfs, &readers[r], rbuf, CHUNK) => CHUNK;
assert(memcmp(rbuf, &before[i], CHUNK) == 0);
}
}
lfsr_file_close(&lfs, &writer) => 0;
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_close(&lfs, &readers[r]) => 0;
}
// check that file was written as expected
lfsr_file_open(&lfs, &file, "jello", LFS_O_RDONLY) => 0;
uint8_t rbuf[SIZE];
lfsr_file_read(&lfs, &file, rbuf, SIZE) => SIZE;
assert(memcmp(rbuf, after, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
[cases.test_fmulti_wddd_fuzz]
defines.R = 4
# 0 => no sync, readers not updated
# 1 => sync via lfsr_file_sync
# 2 => sync via LFS_O_SYNC
defines.SYNC = [0, 1, 2]
# 0 => no flush
# 1 => flush via lfsr_file_flush
# 2 => flush via LFS_O_FLUSH
defines.FLUSH = [0, 1, 2]
defines.SEED = 'range(10)'
defines.N = 20
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = 42;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
uint8_t after[SIZE];
memcpy(after, before, SIZE);
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// write 1 handle, read R handles in parallel
lfsr_file_t writer;
lfsr_file_t readers[R];
lfsr_file_open(&lfs, &writer, "jello",
LFS_O_WRONLY
| ((FLUSH == 2) ? LFS_O_FLUSH : 0)
| ((SYNC == 2) ? LFS_O_SYNC : 0)) => 0;
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_open(&lfs, &readers[r], "jello",
LFS_O_RDONLY | LFS_O_DESYNC) => 0;
}
for (lfs_size_t i = 0; i < N; i++) {
// choose a random offset
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
lfs_size_t size = lfs_min32(CHUNK, SIZE - off);
lfsr_file_seek(&lfs, &writer, off, LFS_SEEK_SET) => off;
// write
uint8_t wbuf[CHUNK];
for (lfs_size_t j = 0; j < size; j++) {
wbuf[j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &writer, wbuf, size) => size;
memcpy(&after[off], wbuf, size);
if (FLUSH == 1) {
lfsr_file_flush(&lfs, &writer) => 0;
}
if (SYNC == 1) {
lfsr_file_sync(&lfs, &writer) => 0;
}
for (lfs_size_t r = 0; r < R; r++) {
// choose a random offset
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
lfs_size_t size = lfs_min32(CHUNK, SIZE - off);
lfsr_file_seek(&lfs, &readers[r], off, LFS_SEEK_SET) => off;
// read
uint8_t rbuf[CHUNK];
lfsr_file_read(&lfs, &readers[r], rbuf, CHUNK) => size;
assert(memcmp(rbuf, &before[off], size) == 0);
}
}
lfsr_file_close(&lfs, &writer) => 0;
for (lfs_size_t r = 0; r < R; r++) {
lfsr_file_close(&lfs, &readers[r]) => 0;
}
// check that file was written as expected
lfsr_file_open(&lfs, &file, "jello", LFS_O_RDONLY) => 0;
uint8_t rbuf[SIZE];
lfsr_file_read(&lfs, &file, rbuf, SIZE) => SIZE;
assert(memcmp(rbuf, after, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# Test multiple desynced rd/wrers
[cases.test_fmulti_rdrd]
defines.RW = 4
# 0 => no sync, readers not updated
# 1 => sync via lfsr_file_sync
# 2 => sync via LFS_O_SYNC
defines.SYNC = [0, 1, 2]
# 0 => no flush
# 1 => flush via lfsr_file_flush
# 2 => flush via LFS_O_FLUSH
defines.FLUSH = [0, 1, 2]
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = 42;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
uint8_t between[RW][SIZE];
for (lfs_size_t rw = 0; rw < RW; rw++) {
memcpy(between[rw], before, SIZE);
}
uint8_t after[SIZE];
memcpy(after, before, SIZE);
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// write RW rdwrs in parallel
lfsr_file_t rdwrs[RW];
for (lfs_size_t rw = 0; rw < RW; rw++) {
lfsr_file_open(&lfs, &rdwrs[rw], "jello",
LFS_O_RDWR
| LFS_O_DESYNC
| ((FLUSH == 2) ? LFS_O_FLUSH : 0)
| ((SYNC == 2) ? LFS_O_SYNC : 0)) => 0;
}
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
for (lfs_size_t rw = 0; rw < RW; rw++) {
uint8_t wbuf[CHUNK];
for (lfs_size_t j = 0; j < CHUNK; j++) {
wbuf[j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &rdwrs[rw], i, LFS_SEEK_SET) => i;
lfsr_file_write(&lfs, &rdwrs[rw], wbuf, CHUNK) => CHUNK;
memcpy(&between[rw][i], wbuf, CHUNK);
if (SYNC == 0) {
if (rw == 0) {
memcpy(&after[i], wbuf, CHUNK);
}
} else {
if (FLUSH == 1) {
lfsr_file_flush(&lfs, &rdwrs[rw]) => 0;
}
if (SYNC == 1) {
lfsr_file_sync(&lfs, &rdwrs[rw]) => 0;
}
if (i == 0) {
memcpy(after, between[rw], SIZE);
} else {
memcpy(&after[i], wbuf, CHUNK);
}
}
}
for (lfs_size_t rw = 0; rw < RW; rw++) {
lfsr_file_seek(&lfs, &rdwrs[rw], i, LFS_SEEK_SET) => i;
uint8_t rbuf[CHUNK];
lfsr_file_read(&lfs, &rdwrs[rw], rbuf, CHUNK) => CHUNK;
if (SYNC == 0) {
assert(memcmp(rbuf, &between[rw][i], CHUNK) == 0);
} else {
assert(memcmp(rbuf, &after[i], CHUNK) == 0);
}
}
}
for (lfs_size_t rw = 0; rw < RW; rw++) {
lfsr_file_close(&lfs, &rdwrs[rw]) => 0;
}
// check that file was written as expected
lfsr_file_open(&lfs, &file, "jello", LFS_O_RDONLY) => 0;
uint8_t rbuf[SIZE];
lfsr_file_read(&lfs, &file, rbuf, SIZE) => SIZE;
if (SYNC == 0) {
assert(memcmp(rbuf, before, SIZE) == 0);
} else {
assert(memcmp(rbuf, after, SIZE) == 0);
}
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
[cases.test_fmulti_rdrd_fuzz]
defines.RW = 4
# 0 => no sync, readers not updated
# 1 => sync via lfsr_file_sync
# 2 => sync via LFS_O_SYNC
defines.SYNC = [0, 1, 2]
# 0 => no flush
# 1 => flush via lfsr_file_flush
# 2 => flush via LFS_O_FLUSH
defines.FLUSH = [0, 1, 2]
defines.SEED = 'range(10)'
defines.N = 20
defines.SIZE = [
'CACHE_SIZE/2',
'2*CACHE_SIZE',
'BLOCK_SIZE/2',
'BLOCK_SIZE',
'2*BLOCK_SIZE',
'4*BLOCK_SIZE',
]
defines.CHUNK = '(SIZE+16-1) / 16'
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
uint32_t prng = 42;
uint8_t before[SIZE];
for (lfs_size_t i = 0; i < SIZE; i++) {
before[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
uint8_t between[RW][SIZE];
for (lfs_size_t rw = 0; rw < RW; rw++) {
memcpy(between[rw], before, SIZE);
}
uint8_t after[SIZE];
memcpy(after, before, SIZE);
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "jello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfsr_file_write(&lfs, &file, before, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// write RW rdwrs in parallel
lfsr_file_t rdwrs[RW];
for (lfs_size_t rw = 0; rw < RW; rw++) {
lfsr_file_open(&lfs, &rdwrs[rw], "jello",
LFS_O_RDWR
| LFS_O_DESYNC
| ((FLUSH == 2) ? LFS_O_FLUSH : 0)
| ((SYNC == 2) ? LFS_O_SYNC : 0)) => 0;
}
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
for (lfs_size_t rw = 0; rw < RW; rw++) {
// choose a random offset
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
lfs_size_t size = lfs_min32(CHUNK, SIZE - off);
lfsr_file_seek(&lfs, &rdwrs[rw], off, LFS_SEEK_SET) => off;
// write
uint8_t wbuf[CHUNK];
for (lfs_size_t j = 0; j < size; j++) {
wbuf[j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &rdwrs[rw], wbuf, size) => size;
memcpy(&between[rw][off], wbuf, size);
if (SYNC == 0) {
if (rw == 0) {
memcpy(&after[off], wbuf, size);
}
} else {
if (FLUSH == 1) {
lfsr_file_flush(&lfs, &rdwrs[rw]) => 0;
}
if (SYNC == 1) {
lfsr_file_sync(&lfs, &rdwrs[rw]) => 0;
}
if (i == 0) {
memcpy(after, between[rw], SIZE);
} else {
memcpy(&after[off], wbuf, size);
}
}
}
for (lfs_size_t rw = 0; rw < RW; rw++) {
// choose a random offset
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
lfs_size_t size = lfs_min32(CHUNK, SIZE - off);
lfsr_file_seek(&lfs, &rdwrs[rw], off, LFS_SEEK_SET) => off;
// read
uint8_t rbuf[CHUNK];
lfsr_file_read(&lfs, &rdwrs[rw], rbuf, CHUNK) => size;
if (SYNC == 0) {
assert(memcmp(rbuf, &between[rw][off], size) == 0);
} else {
assert(memcmp(rbuf, &after[off], size) == 0);
}
}
}
for (lfs_size_t rw = 0; rw < RW; rw++) {
lfsr_file_close(&lfs, &rdwrs[rw]) => 0;
}
// check that file was written as expected
lfsr_file_open(&lfs, &file, "jello", LFS_O_RDONLY) => 0;
uint8_t rbuf[SIZE];
lfsr_file_read(&lfs, &file, rbuf, SIZE) => SIZE;
if (SYNC == 0) {
assert(memcmp(rbuf, before, SIZE) == 0);
} else {
assert(memcmp(rbuf, after, SIZE) == 0);
}
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
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