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Use LFS_F_OPENED flag to protect against use of not opened or closed file.

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Ar2rL
2019-07-21 11:34:53 +02:00
parent df2e676562
commit 72a3758958
1 changed files with 27 additions and 2 deletions
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25
lfs.c
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@@ -2248,6 +2248,9 @@ static int lfs_ctz_traverse(lfs_t *lfs,
int lfs_file_opencfg(lfs_t *lfs, lfs_file_t *file, int lfs_file_opencfg(lfs_t *lfs, lfs_file_t *file,
const char *path, int flags, const char *path, int flags,
const struct lfs_file_config *cfg) { const struct lfs_file_config *cfg) {
// do not allow open for already opened file
LFS_ASSERT(0 == (file->flags & LFS_F_OPENED));
// deorphan if we haven't yet, needed at most once after poweron // deorphan if we haven't yet, needed at most once after poweron
if ((flags & 3) != LFS_O_RDONLY) { if ((flags & 3) != LFS_O_RDONLY) {
int err = lfs_fs_forceconsistency(lfs); int err = lfs_fs_forceconsistency(lfs);
@@ -2381,6 +2384,8 @@ int lfs_file_opencfg(lfs_t *lfs, lfs_file_t *file,
} }
} }
file->flags |= LFS_F_OPENED;
return 0; return 0;
cleanup: cleanup:
@@ -2397,6 +2402,8 @@ int lfs_file_open(lfs_t *lfs, lfs_file_t *file,
} }
int lfs_file_close(lfs_t *lfs, lfs_file_t *file) { int lfs_file_close(lfs_t *lfs, lfs_file_t *file) {
LFS_ASSERT(file->flags & LFS_F_OPENED);
int err = lfs_file_sync(lfs, file); int err = lfs_file_sync(lfs, file);
// remove from list of mdirs // remove from list of mdirs
@@ -2412,10 +2419,14 @@ int lfs_file_close(lfs_t *lfs, lfs_file_t *file) {
lfs_free(file->cache.buffer); lfs_free(file->cache.buffer);
} }
file->flags &= ~LFS_F_OPENED;
return err; return err;
} }
static int lfs_file_relocate(lfs_t *lfs, lfs_file_t *file) { static int lfs_file_relocate(lfs_t *lfs, lfs_file_t *file) {
LFS_ASSERT(file->flags & LFS_F_OPENED);
while (true) { while (true) {
// just relocate what exists into new block // just relocate what exists into new block
lfs_block_t nblock; lfs_block_t nblock;
@@ -2486,6 +2497,8 @@ relocate:
} }
static int lfs_file_flush(lfs_t *lfs, lfs_file_t *file) { static int lfs_file_flush(lfs_t *lfs, lfs_file_t *file) {
LFS_ASSERT(file->flags & LFS_F_OPENED);
if (file->flags & LFS_F_READING) { if (file->flags & LFS_F_READING) {
if (!(file->flags & LFS_F_INLINE)) { if (!(file->flags & LFS_F_INLINE)) {
lfs_cache_drop(lfs, &file->cache); lfs_cache_drop(lfs, &file->cache);
@@ -2564,6 +2577,8 @@ relocate:
} }
int lfs_file_sync(lfs_t *lfs, lfs_file_t *file) { int lfs_file_sync(lfs_t *lfs, lfs_file_t *file) {
LFS_ASSERT(file->flags & LFS_F_OPENED);
while (true) { while (true) {
int err = lfs_file_flush(lfs, file); int err = lfs_file_flush(lfs, file);
if (err) { if (err) {
@@ -2628,6 +2643,8 @@ lfs_ssize_t lfs_file_read(lfs_t *lfs, lfs_file_t *file,
uint8_t *data = buffer; uint8_t *data = buffer;
lfs_size_t nsize = size; lfs_size_t nsize = size;
LFS_ASSERT(file->flags & LFS_F_OPENED);
if ((file->flags & 3) == LFS_O_WRONLY) { if ((file->flags & 3) == LFS_O_WRONLY) {
return LFS_ERR_BADF; return LFS_ERR_BADF;
} }
@@ -2701,6 +2718,8 @@ lfs_ssize_t lfs_file_write(lfs_t *lfs, lfs_file_t *file,
const uint8_t *data = buffer; const uint8_t *data = buffer;
lfs_size_t nsize = size; lfs_size_t nsize = size;
LFS_ASSERT(file->flags & LFS_F_OPENED);
if ((file->flags & 3) == LFS_O_RDONLY) { if ((file->flags & 3) == LFS_O_RDONLY) {
return LFS_ERR_BADF; return LFS_ERR_BADF;
} }
@@ -2821,6 +2840,8 @@ relocate:
lfs_soff_t lfs_file_seek(lfs_t *lfs, lfs_file_t *file, lfs_soff_t lfs_file_seek(lfs_t *lfs, lfs_file_t *file,
lfs_soff_t off, int whence) { lfs_soff_t off, int whence) {
LFS_ASSERT(file->flags & LFS_F_OPENED);
// write out everything beforehand, may be noop if rdonly // write out everything beforehand, may be noop if rdonly
int err = lfs_file_flush(lfs, file); int err = lfs_file_flush(lfs, file);
if (err) { if (err) {
@@ -2848,6 +2869,8 @@ lfs_soff_t lfs_file_seek(lfs_t *lfs, lfs_file_t *file,
} }
int lfs_file_truncate(lfs_t *lfs, lfs_file_t *file, lfs_off_t size) { int lfs_file_truncate(lfs_t *lfs, lfs_file_t *file, lfs_off_t size) {
LFS_ASSERT(file->flags & LFS_F_OPENED);
if ((file->flags & 3) == LFS_O_RDONLY) { if ((file->flags & 3) == LFS_O_RDONLY) {
return LFS_ERR_BADF; return LFS_ERR_BADF;
} }
@@ -2906,6 +2929,7 @@ int lfs_file_truncate(lfs_t *lfs, lfs_file_t *file, lfs_off_t size) {
lfs_soff_t lfs_file_tell(lfs_t *lfs, lfs_file_t *file) { lfs_soff_t lfs_file_tell(lfs_t *lfs, lfs_file_t *file) {
(void)lfs; (void)lfs;
LFS_ASSERT(file->flags & LFS_F_OPENED);
return file->pos; return file->pos;
} }
@@ -2920,6 +2944,7 @@ int lfs_file_rewind(lfs_t *lfs, lfs_file_t *file) {
lfs_soff_t lfs_file_size(lfs_t *lfs, lfs_file_t *file) { lfs_soff_t lfs_file_size(lfs_t *lfs, lfs_file_t *file) {
(void)lfs; (void)lfs;
LFS_ASSERT(file->flags & LFS_F_OPENED);
if (file->flags & LFS_F_WRITING) { if (file->flags & LFS_F_WRITING) {
return lfs_max(file->pos, file->ctz.size); return lfs_max(file->pos, file->ctz.size);
} else { } else {