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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-04-26 09:49:32 +0300
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-05-13 19:23:55 +0300
commit2405f5948119cdc1c28697fd3110124dad974898 (patch)
tree04bad5852693a5a18cb919c298e59dbf385c1d96 /fs/ubifs
parent2cd0a60cf49db4722445337b90fb06c9672f1128 (diff)
downloadop-kernel-dev-2405f5948119cdc1c28697fd3110124dad974898.zip
op-kernel-dev-2405f5948119cdc1c28697fd3110124dad974898.tar.gz
UBIFS: remove duplicated code
We have duplicated code in 'ubifs_garbage_collect()' and 'ubifs_rcvry_gc_commit()', which is about handling the special case of free LEB. In both cases we just want to garbage-collect the LEB using 'ubifs_garbage_collect_leb()'. This patch teaches 'ubifs_garbage_collect_leb()' to handle free LEB's so that the caller does not have to do this and the duplicated code is removed. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'fs/ubifs')
-rw-r--r--fs/ubifs/gc.c62
-rw-r--r--fs/ubifs/recovery.c19
2 files changed, 33 insertions, 48 deletions
diff --git a/fs/ubifs/gc.c b/fs/ubifs/gc.c
index 151f108..082d21b 100644
--- a/fs/ubifs/gc.c
+++ b/fs/ubifs/gc.c
@@ -473,6 +473,37 @@ int ubifs_garbage_collect_leb(struct ubifs_info *c, struct ubifs_lprops *lp)
ubifs_assert(c->gc_lnum != lnum);
ubifs_assert(wbuf->lnum != lnum);
+ if (lp->free + lp->dirty == c->leb_size) {
+ /* Special case - a free LEB */
+ dbg_gc("LEB %d is free, return it", lp->lnum);
+ ubifs_assert(!(lp->flags & LPROPS_INDEX));
+
+ if (lp->free != c->leb_size) {
+ /*
+ * Write buffers must be sync'd before unmapping
+ * freeable LEBs, because one of them may contain data
+ * which obsoletes something in 'lp->pnum'.
+ */
+ err = gc_sync_wbufs(c);
+ if (err)
+ return err;
+ err = ubifs_change_one_lp(c, lp->lnum, c->leb_size,
+ 0, 0, 0, 0);
+ if (err)
+ return err;
+ }
+ err = ubifs_leb_unmap(c, lp->lnum);
+ if (err)
+ return err;
+
+ if (c->gc_lnum == -1) {
+ c->gc_lnum = lnum;
+ return LEB_RETAINED;
+ }
+
+ return LEB_FREED;
+ }
+
/*
* We scan the entire LEB even though we only really need to scan up to
* (c->leb_size - lp->free).
@@ -682,37 +713,6 @@ int ubifs_garbage_collect(struct ubifs_info *c, int anyway)
"(min. space %d)", lp.lnum, lp.free, lp.dirty,
lp.free + lp.dirty, min_space);
- if (lp.free + lp.dirty == c->leb_size) {
- /* An empty LEB was returned */
- dbg_gc("LEB %d is free, return it", lp.lnum);
- /*
- * ubifs_find_dirty_leb() doesn't return freeable index
- * LEBs.
- */
- ubifs_assert(!(lp.flags & LPROPS_INDEX));
- if (lp.free != c->leb_size) {
- /*
- * Write buffers must be sync'd before
- * unmapping freeable LEBs, because one of them
- * may contain data which obsoletes something
- * in 'lp.pnum'.
- */
- ret = gc_sync_wbufs(c);
- if (ret)
- goto out;
- ret = ubifs_change_one_lp(c, lp.lnum,
- c->leb_size, 0, 0, 0,
- 0);
- if (ret)
- goto out;
- }
- ret = ubifs_leb_unmap(c, lp.lnum);
- if (ret)
- goto out;
- ret = lp.lnum;
- break;
- }
-
space_before = c->leb_size - wbuf->offs - wbuf->used;
if (wbuf->lnum == -1)
space_before = 0;
diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c
index 3dbad6f..1a72046 100644
--- a/fs/ubifs/recovery.c
+++ b/fs/ubifs/recovery.c
@@ -1125,25 +1125,10 @@ int ubifs_rcvry_gc_commit(struct ubifs_info *c)
}
return err;
}
+
ubifs_assert(!(lp.flags & LPROPS_INDEX));
lnum = lp.lnum;
- if (lp.free + lp.dirty == c->leb_size) {
- /* An empty LEB was returned */
- if (lp.free != c->leb_size) {
- err = ubifs_change_one_lp(c, lnum, c->leb_size,
- 0, 0, 0, 0);
- if (err)
- return err;
- }
- err = ubifs_leb_unmap(c, lnum);
- if (err)
- return err;
- c->gc_lnum = lnum;
- dbg_rcvry("allocated LEB %d for GC", lnum);
- /* Run the commit */
- dbg_rcvry("committing");
- return ubifs_run_commit(c);
- }
+
/*
* There was no empty LEB so the used space in the dirtiest LEB must fit
* in the GC head LEB.
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