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UBIFS: improve debugging lprops scanning a little

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When doing the lprops extra check ('dbg_check_lprops()') we scan whole media.
We even scan empty and freeable LEBs which may contain garbage, which we handle
after scanning. This patch teach the lprops checking function
('scan_check_cb()') to avoid scanning for free and freeable LEBs and save time.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy 2011-05-06 20:41:48 +03:00
parent eaeee242c5
commit 8ca5175b02
1 changed files with 18 additions and 24 deletions
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42
fs/ubifs/lprops.c
View file

@ -1100,32 +1100,26 @@ static int scan_check_cb(struct ubifs_info *c,
goto out;
}
/*
* After an unclean unmount, empty and freeable LEBs
* may contain garbage - do not scan them.
*/
if (lp->free == c->leb_size) {
lst->empty_lebs += 1;
lst->total_free += c->leb_size;
lst->total_dark += ubifs_calc_dark(c, c->leb_size);
return LPT_SCAN_CONTINUE;
}
if (lp->free + lp->dirty == c->leb_size &&
!(lp->flags & LPROPS_INDEX)) {
lst->total_free += lp->free;
lst->total_dirty += lp->dirty;
lst->total_dark += ubifs_calc_dark(c, c->leb_size);
return LPT_SCAN_CONTINUE;
}
sleb = ubifs_scan(c, lnum, 0, buf, 0);
if (IS_ERR(sleb)) {
/*
* After an unclean unmount, empty and freeable LEBs
* may contain garbage.
*/
if (lp->free == c->leb_size) {
ubifs_err("scan errors were in empty LEB "
"- continuing checking");
lst->empty_lebs += 1;
lst->total_free += c->leb_size;
lst->total_dark += ubifs_calc_dark(c, c->leb_size);
ret = LPT_SCAN_CONTINUE;
goto exit;
}
if (lp->free + lp->dirty == c->leb_size &&
!(lp->flags & LPROPS_INDEX)) {
ubifs_err("scan errors were in freeable LEB "
"- continuing checking");
lst->total_free += lp->free;
lst->total_dirty += lp->dirty;
lst->total_dark += ubifs_calc_dark(c, c->leb_size);
ret = LPT_SCAN_CONTINUE;
goto exit;
}
data->err = PTR_ERR(sleb);
ret = LPT_SCAN_STOP;
goto exit;