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geky-bot
2021-01-20 02:41:58 +00:00
parent c40271bcf3 1863dc7883
commit b816d7f898
13 changed files with 1556 additions and 584 deletions
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128
lfs2.c
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@@ -425,7 +425,8 @@ static inline void lfs2_superblock_tole32(lfs2_superblock_t *superblock) {
superblock->attr_max = lfs2_tole32(superblock->attr_max);
}
static inline bool lfs2_mlist_isopen(struct lfs2_mlist *head,
#ifndef LFS2_NO_ASSERT
static bool lfs2_mlist_isopen(struct lfs2_mlist *head,
struct lfs2_mlist *node) {
for (struct lfs2_mlist **p = &head; *p; p = &(*p)->next) {
if (*p == (struct lfs2_mlist*)node) {
@@ -435,8 +436,9 @@ static inline bool lfs2_mlist_isopen(struct lfs2_mlist *head,
return false;
}
#endif
static inline void lfs2_mlist_remove(lfs2_t *lfs2, struct lfs2_mlist *mlist) {
static void lfs2_mlist_remove(lfs2_t *lfs2, struct lfs2_mlist *mlist) {
for (struct lfs2_mlist **p = &lfs2->mlist; *p; p = &(*p)->next) {
if (*p == mlist) {
*p = (*p)->next;
@@ -445,7 +447,7 @@ static inline void lfs2_mlist_remove(lfs2_t *lfs2, struct lfs2_mlist *mlist) {
}
}
static inline void lfs2_mlist_append(lfs2_t *lfs2, struct lfs2_mlist *mlist) {
static void lfs2_mlist_append(lfs2_t *lfs2, struct lfs2_mlist *mlist) {
mlist->next = lfs2->mlist;
lfs2->mlist = mlist;
}
@@ -465,7 +467,7 @@ static int lfs2_file_rawsync(lfs2_t *lfs2, lfs2_file_t *file);
static int lfs2_file_outline(lfs2_t *lfs2, lfs2_file_t *file);
static int lfs2_file_flush(lfs2_t *lfs2, lfs2_file_t *file);
static void lfs2_fs_preporphans(lfs2_t *lfs2, int8_t orphans);
static int lfs2_fs_preporphans(lfs2_t *lfs2, int8_t orphans);
static void lfs2_fs_prepmove(lfs2_t *lfs2,
uint16_t id, const lfs2_block_t pair[2]);
static int lfs2_fs_pred(lfs2_t *lfs2, const lfs2_block_t dir[2],
@@ -1589,7 +1591,8 @@ static int lfs2_dir_compact(lfs2_t *lfs2,
// for metadata updates.
if (end - begin < 0xff &&
size <= lfs2_min(lfs2->cfg->block_size - 36,
lfs2_alignup(lfs2->cfg->block_size/2,
lfs2_alignup((lfs2->cfg->metadata_max ?
lfs2->cfg->metadata_max : lfs2->cfg->block_size)/2,
lfs2->cfg->prog_size))) {
break;
}
@@ -1674,7 +1677,8 @@ static int lfs2_dir_compact(lfs2_t *lfs2,
.crc = 0xffffffff,
.begin = 0,
.end = lfs2->cfg->block_size - 8,
.end = (lfs2->cfg->metadata_max ?
lfs2->cfg->metadata_max : lfs2->cfg->block_size) - 8,
};
// erase block to write to
@@ -1884,7 +1888,8 @@ static int lfs2_dir_commit(lfs2_t *lfs2, lfs2_mdir_t *dir,
.crc = 0xffffffff,
.begin = dir->off,
.end = lfs2->cfg->block_size - 8,
.end = (lfs2->cfg->metadata_max ?
lfs2->cfg->metadata_max : lfs2->cfg->block_size) - 8,
};
// traverse attrs that need to be written out
@@ -2061,7 +2066,10 @@ static int lfs2_rawmkdir(lfs2_t *lfs2, const char *path) {
// current block end of list?
if (cwd.m.split) {
// update tails, this creates a desync
lfs2_fs_preporphans(lfs2, +1);
err = lfs2_fs_preporphans(lfs2, +1);
if (err) {
return err;
}
// it's possible our predecessor has to be relocated, and if
// our parent is our predecessor's predecessor, this could have
@@ -2081,7 +2089,10 @@ static int lfs2_rawmkdir(lfs2_t *lfs2, const char *path) {
}
lfs2->mlist = cwd.next;
lfs2_fs_preporphans(lfs2, -1);
err = lfs2_fs_preporphans(lfs2, -1);
if (err) {
return err;
}
}
// now insert into our parent block
@@ -2966,7 +2977,9 @@ static lfs2_ssize_t lfs2_file_rawwrite(lfs2_t *lfs2, lfs2_file_t *file,
if ((file->flags & LFS2_F_INLINE) &&
lfs2_max(file->pos+nsize, file->ctz.size) >
lfs2_min(0x3fe, lfs2_min(
lfs2->cfg->cache_size, lfs2->cfg->block_size/8))) {
lfs2->cfg->cache_size,
(lfs2->cfg->metadata_max ?
lfs2->cfg->metadata_max : lfs2->cfg->block_size) / 8))) {
// inline file doesn't fit anymore
int err = lfs2_file_outline(lfs2, file);
if (err) {
@@ -3048,14 +3061,6 @@ relocate:
static lfs2_soff_t lfs2_file_rawseek(lfs2_t *lfs2, lfs2_file_t *file,
lfs2_soff_t off, int whence) {
#ifndef LFS2_READONLY
// write out everything beforehand, may be noop if rdonly
int err = lfs2_file_flush(lfs2, file);
if (err) {
return err;
}
#endif
// find new pos
lfs2_off_t npos = file->pos;
if (whence == LFS2_SEEK_SET) {
@@ -3063,7 +3068,7 @@ static lfs2_soff_t lfs2_file_rawseek(lfs2_t *lfs2, lfs2_file_t *file,
} else if (whence == LFS2_SEEK_CUR) {
npos = file->pos + off;
} else if (whence == LFS2_SEEK_END) {
npos = file->ctz.size + off;
npos = lfs2_file_rawsize(lfs2, file) + off;
}
if (npos > lfs2->file_max) {
@@ -3071,6 +3076,19 @@ static lfs2_soff_t lfs2_file_rawseek(lfs2_t *lfs2, lfs2_file_t *file,
return LFS2_ERR_INVAL;
}
if (file->pos == npos) {
// noop - position has not changed
return npos;
}
#ifndef LFS2_READONLY
// write out everything beforehand, may be noop if rdonly
int err = lfs2_file_flush(lfs2, file);
if (err) {
return err;
}
#endif
// update pos
file->pos = npos;
return npos;
@@ -3101,21 +3119,22 @@ static int lfs2_file_rawtruncate(lfs2_t *lfs2, lfs2_file_t *file, lfs2_off_t siz
return err;
}
// need to set pos/block/off consistently so seeking back to
// the old position does not get confused
file->pos = size;
file->ctz.head = file->block;
file->ctz.size = size;
file->flags |= LFS2_F_DIRTY | LFS2_F_READING;
} else if (size > oldsize) {
// flush+seek if not already at end
if (file->pos != oldsize) {
lfs2_soff_t res = lfs2_file_rawseek(lfs2, file, 0, LFS2_SEEK_END);
if (res < 0) {
return (int)res;
}
lfs2_soff_t res = lfs2_file_rawseek(lfs2, file, 0, LFS2_SEEK_END);
if (res < 0) {
return (int)res;
}
// fill with zeros
while (file->pos < size) {
lfs2_ssize_t res = lfs2_file_rawwrite(lfs2, file, &(uint8_t){0}, 1);
res = lfs2_file_rawwrite(lfs2, file, &(uint8_t){0}, 1);
if (res < 0) {
return (int)res;
}
@@ -3206,7 +3225,10 @@ static int lfs2_rawremove(lfs2_t *lfs2, const char *path) {
}
// mark fs as orphaned
lfs2_fs_preporphans(lfs2, +1);
err = lfs2_fs_preporphans(lfs2, +1);
if (err) {
return err;
}
// I know it's crazy but yes, dir can be changed by our parent's
// commit (if predecessor is child)
@@ -3226,7 +3248,10 @@ static int lfs2_rawremove(lfs2_t *lfs2, const char *path) {
lfs2->mlist = dir.next;
if (lfs2_tag_type3(tag) == LFS2_TYPE_DIR) {
// fix orphan
lfs2_fs_preporphans(lfs2, -1);
err = lfs2_fs_preporphans(lfs2, -1);
if (err) {
return err;
}
err = lfs2_fs_pred(lfs2, dir.m.pair, &cwd);
if (err) {
@@ -3312,7 +3337,10 @@ static int lfs2_rawrename(lfs2_t *lfs2, const char *oldpath, const char *newpath
}
// mark fs as orphaned
lfs2_fs_preporphans(lfs2, +1);
err = lfs2_fs_preporphans(lfs2, +1);
if (err) {
return err;
}
// I know it's crazy but yes, dir can be changed by our parent's
// commit (if predecessor is child)
@@ -3355,7 +3383,10 @@ static int lfs2_rawrename(lfs2_t *lfs2, const char *oldpath, const char *newpath
lfs2->mlist = prevdir.next;
if (prevtag != LFS2_ERR_NOENT && lfs2_tag_type3(prevtag) == LFS2_TYPE_DIR) {
// fix orphan
lfs2_fs_preporphans(lfs2, -1);
err = lfs2_fs_preporphans(lfs2, -1);
if (err) {
return err;
}
err = lfs2_fs_pred(lfs2, prevdir.m.pair, &newcwd);
if (err) {
@@ -3536,6 +3567,8 @@ static int lfs2_init(lfs2_t *lfs2, const struct lfs2_config *cfg) {
lfs2->attr_max = LFS2_ATTR_MAX;
}
LFS2_ASSERT(lfs2->cfg->metadata_max <= lfs2->cfg->block_size);
// setup default state
lfs2->root[0] = LFS2_BLOCK_NULL;
lfs2->root[1] = LFS2_BLOCK_NULL;
@@ -3616,12 +3649,6 @@ static int lfs2_rawformat(lfs2_t *lfs2, const struct lfs2_config *cfg) {
goto cleanup;
}
// sanity check that fetch works
err = lfs2_dir_fetch(lfs2, &root, (const lfs2_block_t[2]){0, 1});
if (err) {
goto cleanup;
}
// force compaction to prevent accidentally mounting any
// older version of littlefs that may live on disk
root.erased = false;
@@ -3629,6 +3656,12 @@ static int lfs2_rawformat(lfs2_t *lfs2, const struct lfs2_config *cfg) {
if (err) {
goto cleanup;
}
// sanity check that fetch works
err = lfs2_dir_fetch(lfs2, &root, (const lfs2_block_t[2]){0, 1});
if (err) {
goto cleanup;
}
}
cleanup:
@@ -3829,7 +3862,7 @@ int lfs2_fs_rawtraverse(lfs2_t *lfs2,
if (err) {
return err;
}
} else if (includeorphans &&
} else if (includeorphans &&
lfs2_tag_type3(tag) == LFS2_TYPE_DIRSTRUCT) {
for (int i = 0; i < 2; i++) {
err = cb(data, (&ctz.head)[i]);
@@ -3986,7 +4019,10 @@ static int lfs2_fs_relocate(lfs2_t *lfs2,
if (tag != LFS2_ERR_NOENT) {
// update disk, this creates a desync
lfs2_fs_preporphans(lfs2, +1);
int err = lfs2_fs_preporphans(lfs2, +1);
if (err) {
return err;
}
// fix pending move in this pair? this looks like an optimization but
// is in fact _required_ since relocating may outdate the move.
@@ -4003,7 +4039,7 @@ static int lfs2_fs_relocate(lfs2_t *lfs2,
}
lfs2_pair_tole32(newpair);
int err = lfs2_dir_commit(lfs2, &parent, LFS2_MKATTRS(
err = lfs2_dir_commit(lfs2, &parent, LFS2_MKATTRS(
{LFS2_MKTAG_IF(moveid != 0x3ff,
LFS2_TYPE_DELETE, moveid, 0), NULL},
{tag, newpair}));
@@ -4013,7 +4049,10 @@ static int lfs2_fs_relocate(lfs2_t *lfs2,
}
// next step, clean up orphans
lfs2_fs_preporphans(lfs2, -1);
err = lfs2_fs_preporphans(lfs2, -1);
if (err) {
return err;
}
}
// find pred
@@ -4052,11 +4091,13 @@ static int lfs2_fs_relocate(lfs2_t *lfs2,
#endif
#ifndef LFS2_READONLY
static void lfs2_fs_preporphans(lfs2_t *lfs2, int8_t orphans) {
static int lfs2_fs_preporphans(lfs2_t *lfs2, int8_t orphans) {
LFS2_ASSERT(lfs2_tag_size(lfs2->gstate.tag) > 0 || orphans >= 0);
lfs2->gstate.tag += orphans;
lfs2->gstate.tag = ((lfs2->gstate.tag & ~LFS2_MKTAG(0x800, 0, 0)) |
((uint32_t)lfs2_gstate_hasorphans(&lfs2->gstate) << 31));
return 0;
}
#endif
@@ -4173,8 +4214,7 @@ static int lfs2_fs_deorphan(lfs2_t *lfs2) {
}
// mark orphans as fixed
lfs2_fs_preporphans(lfs2, -lfs2_gstate_getorphans(&lfs2->gstate));
return 0;
return lfs2_fs_preporphans(lfs2, -lfs2_gstate_getorphans(&lfs2->gstate));
}
#endif
@@ -4723,7 +4763,7 @@ static int lfs2_rawmigrate(lfs2_t *lfs2, const struct lfs2_config *cfg) {
lfs21_entry_tole32(&entry1.d);
err = lfs2_dir_commit(lfs2, &dir2, LFS2_MKATTRS(
{LFS2_MKTAG(LFS2_TYPE_CREATE, id, 0)},
{LFS2_MKTAG(LFS2_TYPE_CREATE, id, 0), NULL},
{LFS2_MKTAG_IF_ELSE(isdir,
LFS2_TYPE_DIR, id, entry1.d.nlen,
LFS2_TYPE_REG, id, entry1.d.nlen),
@@ -4828,7 +4868,7 @@ static int lfs2_rawmigrate(lfs2_t *lfs2, const struct lfs2_config *cfg) {
lfs2_superblock_tole32(&superblock);
err = lfs2_dir_commit(lfs2, &dir2, LFS2_MKATTRS(
{LFS2_MKTAG(LFS2_TYPE_CREATE, 0, 0)},
{LFS2_MKTAG(LFS2_TYPE_CREATE, 0, 0), NULL},
{LFS2_MKTAG(LFS2_TYPE_SUPERBLOCK, 0, 8), "littlefs"},
{LFS2_MKTAG(LFS2_TYPE_INLINESTRUCT, 0, sizeof(superblock)),
&superblock}));