UBIFS: improve find function interface
Make 'ubifs_find_free_space()' return offset where free space starts,
rather than the amount of free space. This is just more appropriat
for its caller.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
diff --git a/fs/ubifs/find.c b/fs/ubifs/find.c
index 717d79c..1d54383 100644
--- a/fs/ubifs/find.c
+++ b/fs/ubifs/find.c
@@ -478,7 +478,7 @@
* ubifs_find_free_space - find a data LEB with free space.
* @c: the UBIFS file-system description object
* @min_space: minimum amount of required free space
- * @free: contains amount of free space in the LEB on exit
+ * @offs: contains offset of where free space starts on exit
* @squeeze: whether to try to find space in a non-empty LEB first
*
* This function looks for an LEB with at least @min_space bytes of free space.
@@ -490,7 +490,7 @@
* failed to find a LEB with @min_space bytes of free space and other a negative
* error codes in case of failure.
*/
-int ubifs_find_free_space(struct ubifs_info *c, int min_space, int *free,
+int ubifs_find_free_space(struct ubifs_info *c, int min_space, int *offs,
int squeeze)
{
const struct ubifs_lprops *lprops;
@@ -558,10 +558,10 @@
spin_unlock(&c->space_lock);
}
- *free = lprops->free;
+ *offs = c->leb_size - lprops->free;
ubifs_release_lprops(c);
- if (*free == c->leb_size) {
+ if (*offs == 0) {
/*
* Ensure that empty LEBs have been unmapped. They may not have
* been, for example, because of an unclean unmount. Also
@@ -573,8 +573,8 @@
return err;
}
- dbg_find("found LEB %d, free %d", lnum, *free);
- ubifs_assert(*free >= min_space);
+ dbg_find("found LEB %d, free %d", lnum, c->leb_size - *offs);
+ ubifs_assert(*offs <= c->leb_size - min_space);
return lnum;
out:
diff --git a/fs/ubifs/journal.c b/fs/ubifs/journal.c
index a11ca09..a2d334e 100644
--- a/fs/ubifs/journal.c
+++ b/fs/ubifs/journal.c
@@ -114,7 +114,7 @@
*/
static int reserve_space(struct ubifs_info *c, int jhead, int len)
{
- int err = 0, err1, retries = 0, avail, lnum, offs, free, squeeze;
+ int err = 0, err1, retries = 0, avail, lnum, offs, squeeze;
struct ubifs_wbuf *wbuf = &c->jheads[jhead].wbuf;
/*
@@ -139,10 +139,9 @@
* Write buffer wasn't seek'ed or there is no enough space - look for an
* LEB with some empty space.
*/
- lnum = ubifs_find_free_space(c, len, &free, squeeze);
+ lnum = ubifs_find_free_space(c, len, &offs, squeeze);
if (lnum >= 0) {
/* Found an LEB, add it to the journal head */
- offs = c->leb_size - free;
err = ubifs_add_bud_to_log(c, jhead, lnum, offs);
if (err)
goto out_return;
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 039a68b..2da1193 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -1500,7 +1500,7 @@
long long ubifs_calc_available(const struct ubifs_info *c, int min_idx_lebs);
/* find.c */
-int ubifs_find_free_space(struct ubifs_info *c, int min_space, int *free,
+int ubifs_find_free_space(struct ubifs_info *c, int min_space, int *offs,
int squeeze);
int ubifs_find_free_leb_for_idx(struct ubifs_info *c);
int ubifs_find_dirty_leb(struct ubifs_info *c, struct ubifs_lprops *ret_lp,
