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xfs: flag free space btree records that could be merged

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Complain if we encounter free space 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 19:00:26 -07:00
parent 1e59fdb7d6
commit d5784ae827
1 changed files with 28 additions and 1 deletions
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29
fs/xfs/scrub/alloc.c
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@ -31,6 +31,12 @@ xchk_setup_ag_allocbt(
}
/* Free space btree scrubber. */
struct xchk_alloc {
/* Previous free space extent. */
struct xfs_alloc_rec_incore prev;
};
/*
* Ensure there's a corresponding cntbt/bnobt record matching this
* bnobt/cntbt record, respectively.
@ -93,6 +99,24 @@ xchk_allocbt_xref(
xchk_xref_is_not_cow_staging(sc, agbno, len);
}
/* Flag failures for records that could be merged. */
STATIC void
xchk_allocbt_mergeable(
struct xchk_btree *bs,
struct xchk_alloc *ca,
const struct xfs_alloc_rec_incore *irec)
{
if (bs->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
if (ca->prev.ar_blockcount > 0 &&
ca->prev.ar_startblock + ca->prev.ar_blockcount == irec->ar_startblock &&
ca->prev.ar_blockcount + irec->ar_blockcount < (uint32_t)~0U)
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
memcpy(&ca->prev, irec, sizeof(*irec));
}
/* Scrub a bnobt/cntbt record. */
STATIC int
xchk_allocbt_rec(
@ -100,6 +124,7 @@ xchk_allocbt_rec(
const union xfs_btree_rec *rec)
{
struct xfs_alloc_rec_incore irec;
struct xchk_alloc *ca = bs->private;
xfs_alloc_btrec_to_irec(rec, &irec);
if (xfs_alloc_check_irec(bs->cur, &irec) != NULL) {
@ -107,6 +132,7 @@ xchk_allocbt_rec(
return 0;
}
xchk_allocbt_mergeable(bs, ca, &irec);
xchk_allocbt_xref(bs->sc, &irec);
return 0;
@ -118,10 +144,11 @@ xchk_allocbt(
struct xfs_scrub *sc,
xfs_btnum_t which)
{
struct xchk_alloc ca = { };
struct xfs_btree_cur *cur;
cur = which == XFS_BTNUM_BNO ? sc->sa.bno_cur : sc->sa.cnt_cur;
return xchk_btree(sc, cur, xchk_allocbt_rec, &XFS_RMAP_OINFO_AG, NULL);
return xchk_btree(sc, cur, xchk_allocbt_rec, &XFS_RMAP_OINFO_AG, &ca);
}
int