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xfs: cross-reference with the bnobt

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When we're scrubbing various btrees, cross-reference the records with
the bnobt to ensure that we don't also think the space is free.

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 18:53:06 -08:00
parent 166d76410d
commit 52dc4b44af
9 changed files with 176 additions and 0 deletions
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96
fs/xfs/scrub/agheader.c
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@@ -107,8 +107,23 @@ xfs_scrub_superblock_xref(
struct xfs_scrub_context *sc,
struct xfs_buf *bp)
{
struct xfs_mount *mp = sc->mp;
xfs_agnumber_t agno = sc->sm->sm_agno;
xfs_agblock_t agbno;
int error;
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
agbno = XFS_SB_BLOCK(mp);
error = xfs_scrub_ag_init(sc, agno, &sc->sa);
if (!xfs_scrub_xref_process_error(sc, agno, agbno, &error))
return;
xfs_scrub_xref_is_used_space(sc, agbno, 1);
/* scrub teardown will take care of sc->sa for us */
}
/*
@@ -406,13 +421,61 @@ xfs_scrub_superblock(
/* AGF */
/* Tally freespace record lengths. */
STATIC int
xfs_scrub_agf_record_bno_lengths(
struct xfs_btree_cur *cur,
struct xfs_alloc_rec_incore *rec,
void *priv)
{
xfs_extlen_t *blocks = priv;
(*blocks) += rec->ar_blockcount;
return 0;
}
/* Check agf_freeblks */
static inline void
xfs_scrub_agf_xref_freeblks(
struct xfs_scrub_context *sc)
{
struct xfs_agf *agf = XFS_BUF_TO_AGF(sc->sa.agf_bp);
xfs_extlen_t blocks = 0;
int error;
if (!sc->sa.bno_cur)
return;
error = xfs_alloc_query_all(sc->sa.bno_cur,
xfs_scrub_agf_record_bno_lengths, &blocks);
if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.bno_cur))
return;
if (blocks != be32_to_cpu(agf->agf_freeblks))
xfs_scrub_block_xref_set_corrupt(sc, sc->sa.agf_bp);
}
/* Cross-reference with the other btrees. */
STATIC void
xfs_scrub_agf_xref(
struct xfs_scrub_context *sc)
{
struct xfs_mount *mp = sc->mp;
xfs_agblock_t agbno;
int error;
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
agbno = XFS_AGF_BLOCK(mp);
error = xfs_scrub_ag_btcur_init(sc, &sc->sa);
if (error)
return;
xfs_scrub_xref_is_used_space(sc, agbno, 1);
xfs_scrub_agf_xref_freeblks(sc);
/* scrub teardown will take care of sc->sa for us */
}
/* Scrub the AGF. */
@@ -514,6 +577,8 @@ xfs_scrub_agfl_block_xref(
{
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
xfs_scrub_xref_is_used_space(sc, agbno, 1);
}
/* Scrub an AGFL block. */
@@ -554,8 +619,25 @@ STATIC void
xfs_scrub_agfl_xref(
struct xfs_scrub_context *sc)
{
struct xfs_mount *mp = sc->mp;
xfs_agblock_t agbno;
int error;
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
agbno = XFS_AGFL_BLOCK(mp);
error = xfs_scrub_ag_btcur_init(sc, &sc->sa);
if (error)
return;
xfs_scrub_xref_is_used_space(sc, agbno, 1);
/*
* Scrub teardown will take care of sc->sa for us. Leave sc->sa
* active so that the agfl block xref can use it too.
*/
}
/* Scrub the AGFL. */
@@ -630,8 +712,22 @@ STATIC void
xfs_scrub_agi_xref(
struct xfs_scrub_context *sc)
{
struct xfs_mount *mp = sc->mp;
xfs_agblock_t agbno;
int error;
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
agbno = XFS_AGI_BLOCK(mp);
error = xfs_scrub_ag_btcur_init(sc, &sc->sa);
if (error)
return;
xfs_scrub_xref_is_used_space(sc, agbno, 1);
/* scrub teardown will take care of sc->sa for us */
}
/* Scrub the AGI. */