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xfs: flag refcount btree records that could be merged

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Complain if we encounter refcount btree records that could be merged.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong 2023-04-11 19:00:27 -07:00
parent d5784ae827
commit db0502b39c
1 changed files with 44 additions and 0 deletions
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44
fs/xfs/scrub/refcount.c
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@ -333,6 +333,9 @@ xchk_refcountbt_xref(
} }
struct xchk_refcbt_records { struct xchk_refcbt_records {
/* Previous refcount record. */
struct xfs_refcount_irec prev_rec;
/* The next AG block where we aren't expecting shared extents. */ /* The next AG block where we aren't expecting shared extents. */
xfs_agblock_t next_unshared_agbno; xfs_agblock_t next_unshared_agbno;
@ -390,6 +393,46 @@ xchk_refcountbt_xref_gaps(
xchk_should_check_xref(sc, &error, &sc->sa.rmap_cur); xchk_should_check_xref(sc, &error, &sc->sa.rmap_cur);
} }
static inline bool
xchk_refcount_mergeable(
struct xchk_refcbt_records *rrc,
const struct xfs_refcount_irec *r2)
{
const struct xfs_refcount_irec *r1 = &rrc->prev_rec;
/* Ignore if prev_rec is not yet initialized. */
if (r1->rc_blockcount > 0)
return false;
if (r1->rc_domain != r2->rc_domain)
return false;
if (r1->rc_startblock + r1->rc_blockcount != r2->rc_startblock)
return false;
if (r1->rc_refcount != r2->rc_refcount)
return false;
if ((unsigned long long)r1->rc_blockcount + r2->rc_blockcount >
MAXREFCEXTLEN)
return false;
return true;
}
/* Flag failures for records that could be merged. */
STATIC void
xchk_refcountbt_check_mergeable(
struct xchk_btree *bs,
struct xchk_refcbt_records *rrc,
const struct xfs_refcount_irec *irec)
{
if (bs->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
if (xchk_refcount_mergeable(rrc, irec))
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
memcpy(&rrc->prev_rec, irec, sizeof(struct xfs_refcount_irec));
}
/* Scrub a refcountbt record. */ /* Scrub a refcountbt record. */
STATIC int STATIC int
xchk_refcountbt_rec( xchk_refcountbt_rec(
@ -414,6 +457,7 @@ xchk_refcountbt_rec(
xchk_btree_set_corrupt(bs->sc, bs->cur, 0); xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
rrc->prev_domain = irec.rc_domain; rrc->prev_domain = irec.rc_domain;
xchk_refcountbt_check_mergeable(bs, rrc, &irec);
xchk_refcountbt_xref(bs->sc, &irec); xchk_refcountbt_xref(bs->sc, &irec);
/* /*