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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-04-29 16:35:46 +0300
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-05-13 19:23:56 +0300
commitfe79c05f03777acf87acc54fa3ad357ed5ee3b81 (patch)
tree2a16b31eb5e71c5133db06d6d8fa04322db6e79c /fs/ubifs/recovery.c
parent447442139c764fd75cf892905d0feb08a9b983ed (diff)
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UBIFS: refactor ubifs_rcvry_gc_commit
This commits refactors and cleans up 'ubifs_rcvry_gc_commit()' which was quite untidy, also removes the commentary which was not 100% correct. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'fs/ubifs/recovery.c')
-rw-r--r--fs/ubifs/recovery.c55
1 files changed, 18 insertions, 37 deletions
diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c
index 11776ae8caf6..d28db1ee2045 100644
--- a/fs/ubifs/recovery.c
+++ b/fs/ubifs/recovery.c
@@ -1138,44 +1138,26 @@ int ubifs_rcvry_gc_commit(struct ubifs_info *c)
{
struct ubifs_wbuf *wbuf = &c->jheads[GCHD].wbuf;
struct ubifs_lprops lp;
- int lnum, err;
+ int err;
c->gc_lnum = -1;
- if (wbuf->lnum == -1) {
- dbg_rcvry("no GC head LEB");
- return grab_empty_leb(c);
- }
- /*
- * See whether the used space in the dirtiest LEB fits in the GC head
- * LEB.
- */
- if (wbuf->offs == c->leb_size) {
- dbg_rcvry("no room in GC head LEB");
+ if (wbuf->lnum == -1 || wbuf->offs == c->leb_size) {
+ dbg_rcvry("no GC head: wbuf->lnum %d, wbuf->offs %d",
+ wbuf->lnum, wbuf->offs);
return grab_empty_leb(c);
}
+
err = ubifs_find_dirty_leb(c, &lp, wbuf->offs, 2);
if (err) {
- /*
- * There are no dirty or empty LEBs subject to here being
- * enough for the index. Try to use
- * 'ubifs_find_free_leb_for_idx()', which will return any empty
- * LEBs (ignoring index requirements). If the index then
- * doesn't have enough LEBs the recovery commit will fail -
- * which is the same result anyway i.e. recovery fails. So
- * there is no problem ignoring index requirements and just
- * grabbing a free LEB since we have already established there
- * is not a dirty LEB we could have used instead.
- */
- if (err == -ENOSPC) {
- dbg_rcvry("could not find a dirty LEB");
- return grab_empty_leb(c);
- }
- return err;
+ if (err != -ENOSPC)
+ return err;
+
+ dbg_rcvry("could not find a dirty LEB");
+ return grab_empty_leb(c);
}
ubifs_assert(!(lp.flags & LPROPS_INDEX));
ubifs_assert(lp.free + lp.dirty >= wbuf->offs);
- lnum = lp.lnum;
/*
* We run the commit before garbage collection otherwise subsequent
@@ -1185,11 +1167,8 @@ int ubifs_rcvry_gc_commit(struct ubifs_info *c)
err = ubifs_run_commit(c);
if (err)
return err;
- /*
- * The data in the dirtiest LEB fits in the GC head LEB, so do the GC
- * - use locking to keep 'ubifs_assert()' happy.
- */
- dbg_rcvry("GC'ing LEB %d", lnum);
+
+ dbg_rcvry("GC'ing LEB %d", lp.lnum);
mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
err = ubifs_garbage_collect_leb(c, &lp);
if (err >= 0) {
@@ -1205,14 +1184,16 @@ int ubifs_rcvry_gc_commit(struct ubifs_info *c)
err = -EINVAL;
return err;
}
- if (err != LEB_RETAINED) {
- dbg_err("GC returned %d", err);
+
+ ubifs_assert(err == LEB_RETAINED);
+ if (err != LEB_RETAINED)
return -EINVAL;
- }
+
err = ubifs_leb_unmap(c, c->gc_lnum);
if (err)
return err;
- dbg_rcvry("allocated LEB %d for GC", lnum);
+
+ dbg_rcvry("allocated LEB %d for GC", lp.lnum);
return 0;
}