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Added file list for tracking in flight allocations

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Needed primarily for tracking block allocations, unfortunately
this prevents the freedom for the user to bitwise copy files.
This commit is contained in:
Christopher Haster
2017-04-29 10:22:01 -05:00
parent b55719bab1
commit 210b487325
3 changed files with 132 additions and 6 deletions
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53
lfs.c
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@@ -232,7 +232,13 @@ static int lfs_alloc(lfs_t *lfs, lfs_block_t *block) {
}
// scan again or die trying
return lfs_alloc_scan(lfs, block);
err = lfs_alloc_scan(lfs, block);
if (err) {
LFS_WARN("No more free space%s", "");
return err;
}
return 0;
}
@@ -1010,11 +1016,25 @@ int lfs_file_open(lfs_t *lfs, lfs_file_t *file,
file->size = 0;
}
// add to list of files
file->next = lfs->files;
lfs->files = file;
return 0;
}
int lfs_file_close(lfs_t *lfs, lfs_file_t *file) {
return lfs_file_sync(lfs, file);
int err = lfs_file_sync(lfs, file);
// remove from list of files
for (lfs_file_t **p = &lfs->files; *p; p = &(*p)->next) {
if (*p == file) {
*p = file->next;
break;
}
}
return err;
}
static int lfs_file_flush(lfs_t *lfs, lfs_file_t *file) {
@@ -1453,6 +1473,9 @@ static int lfs_init(lfs_t *lfs, const struct lfs_config *cfg) {
}
}
// setup files as an empty list
lfs->files = NULL;
return 0;
}
@@ -1612,8 +1635,7 @@ int lfs_traverse(lfs_t *lfs, int (*cb)(void*, lfs_block_t), void *data) {
dir.off += entry.d.len;
if ((0xf & entry.d.type) == LFS_TYPE_REG) {
int err = lfs_index_traverse(lfs,
entry.d.u.file.head, entry.d.u.file.size,
cb, data);
entry.d.u.file.head, entry.d.u.file.size, cb, data);
if (err) {
return err;
}
@@ -1623,10 +1645,29 @@ int lfs_traverse(lfs_t *lfs, int (*cb)(void*, lfs_block_t), void *data) {
cwd[0] = dir.d.tail[0];
cwd[1] = dir.d.tail[1];
if (!cwd[0]) {
return 0;
if (lfs_pairisnull(cwd)) {
break;
}
}
// iterate over any open files
for (lfs_file_t *f = lfs->files; f; f = f->next) {
if (f->flags & LFS_O_DIRTY) {
int err = lfs_index_traverse(lfs, f->head, f->size, cb, data);
if (err) {
return err;
}
}
if (f->wblock) {
int err = lfs_index_traverse(lfs, f->wblock, f->pos, cb, data);
if (err) {
return err;
}
}
}
return 0;
}
static int lfs_parent(lfs_t *lfs, const lfs_block_t dir[2]) {