OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

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>
This commit is contained in:
Artem Bityutskiy 2011-04-26 09:49:32 +03:00
parent 2cd0a60cf4
commit 2405f59481
2 changed files with 33 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
fs/ubifs/gc.c
View File

@ -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;

19
fs/ubifs/recovery.c
View File

@ -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.