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xfs: cross-reference bnobt records with cntbt

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Scrub should make sure that each bnobt record has a corresponding
cntbt record.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong
2018-01-16 18:53:07 -08:00
parent 52dc4b44af
commit e1134b12fd
2 changed files with 78 additions and 0 deletions
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33
fs/xfs/scrub/agheader.c
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@@ -454,6 +454,38 @@ xfs_scrub_agf_xref_freeblks(
xfs_scrub_block_xref_set_corrupt(sc, sc->sa.agf_bp);
}
/* Cross reference the AGF with the cntbt (freespace by length btree) */
static inline void
xfs_scrub_agf_xref_cntbt(
struct xfs_scrub_context *sc)
{
struct xfs_agf *agf = XFS_BUF_TO_AGF(sc->sa.agf_bp);
xfs_agblock_t agbno;
xfs_extlen_t blocks;
int have;
int error;
if (!sc->sa.cnt_cur)
return;
/* Any freespace at all? */
error = xfs_alloc_lookup_le(sc->sa.cnt_cur, 0, -1U, &have);
if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.cnt_cur))
return;
if (!have) {
if (agf->agf_freeblks != be32_to_cpu(0))
xfs_scrub_block_xref_set_corrupt(sc, sc->sa.agf_bp);
return;
}
/* Check agf_longest */
error = xfs_alloc_get_rec(sc->sa.cnt_cur, &agbno, &blocks, &have);
if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.cnt_cur))
return;
if (!have || blocks != be32_to_cpu(agf->agf_longest))
xfs_scrub_block_xref_set_corrupt(sc, sc->sa.agf_bp);
}
/* Cross-reference with the other btrees. */
STATIC void
xfs_scrub_agf_xref(
@@ -474,6 +506,7 @@ xfs_scrub_agf_xref(
xfs_scrub_xref_is_used_space(sc, agbno, 1);
xfs_scrub_agf_xref_freeblks(sc);
xfs_scrub_agf_xref_cntbt(sc);
/* scrub teardown will take care of sc->sa for us */
}