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xfs: cross-reference inode btrees during scrub

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Cross-reference the inode btrees with the other metadata when we
scrub the filesystem.

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 e1134b12fd
commit 2e6f27561b
8 changed files with 160 additions and 0 deletions
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73
fs/xfs/scrub/ialloc.c
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@@ -58,6 +58,35 @@ xfs_scrub_setup_ag_iallocbt(
/* Inode btree scrubber. */
/*
* If we're checking the finobt, cross-reference with the inobt.
* Otherwise we're checking the inobt; if there is an finobt, make sure
* we have a record or not depending on freecount.
*/
static inline void
xfs_scrub_iallocbt_chunk_xref_other(
struct xfs_scrub_context *sc,
struct xfs_inobt_rec_incore *irec,
xfs_agino_t agino)
{
struct xfs_btree_cur **pcur;
bool has_irec;
int error;
if (sc->sm->sm_type == XFS_SCRUB_TYPE_FINOBT)
pcur = &sc->sa.ino_cur;
else
pcur = &sc->sa.fino_cur;
if (!(*pcur))
return;
error = xfs_ialloc_has_inode_record(*pcur, agino, agino, &has_irec);
if (!xfs_scrub_should_check_xref(sc, &error, pcur))
return;
if (((irec->ir_freecount > 0 && !has_irec) ||
(irec->ir_freecount == 0 && has_irec)))
xfs_scrub_btree_xref_set_corrupt(sc, *pcur, 0);
}
/* Cross-reference with the other btrees. */
STATIC void
xfs_scrub_iallocbt_chunk_xref(
@@ -71,6 +100,7 @@ xfs_scrub_iallocbt_chunk_xref(
return;
xfs_scrub_xref_is_used_space(sc, agbno, len);
xfs_scrub_iallocbt_chunk_xref_other(sc, irec, agino);
}
/* Is this chunk worth checking? */
@@ -352,3 +382,46 @@ xfs_scrub_finobt(
{
return xfs_scrub_iallocbt(sc, XFS_BTNUM_FINO);
}
/* See if an inode btree has (or doesn't have) an inode chunk record. */
static inline void
xfs_scrub_xref_inode_check(
struct xfs_scrub_context *sc,
xfs_agblock_t agbno,
xfs_extlen_t len,
struct xfs_btree_cur **icur,
bool should_have_inodes)
{
bool has_inodes;
int error;
if (!(*icur))
return;
error = xfs_ialloc_has_inodes_at_extent(*icur, agbno, len, &has_inodes);
if (!xfs_scrub_should_check_xref(sc, &error, icur))
return;
if (has_inodes != should_have_inodes)
xfs_scrub_btree_xref_set_corrupt(sc, *icur, 0);
}
/* xref check that the extent is not covered by inodes */
void
xfs_scrub_xref_is_not_inode_chunk(
struct xfs_scrub_context *sc,
xfs_agblock_t agbno,
xfs_extlen_t len)
{
xfs_scrub_xref_inode_check(sc, agbno, len, &sc->sa.ino_cur, false);
xfs_scrub_xref_inode_check(sc, agbno, len, &sc->sa.fino_cur, false);
}
/* xref check that the extent is covered by inodes */
void
xfs_scrub_xref_is_inode_chunk(
struct xfs_scrub_context *sc,
xfs_agblock_t agbno,
xfs_extlen_t len)
{
xfs_scrub_xref_inode_check(sc, agbno, len, &sc->sa.ino_cur, true);
}