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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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49
fs/xfs/scrub/inode.c
View File

@@ -39,6 +39,7 @@
#include "scrub/xfs_scrub.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/btree.h"
#include "scrub/trace.h"
/*
@@ -577,6 +578,53 @@ out_buf:
return error;
}
/*
* Make sure the finobt doesn't think this inode is free.
* We don't have to check the inobt ourselves because we got the inode via
* IGET_UNTRUSTED, which checks the inobt for us.
*/
static void
xfs_scrub_inode_xref_finobt(
struct xfs_scrub_context *sc,
xfs_ino_t ino)
{
struct xfs_inobt_rec_incore rec;
xfs_agino_t agino;
int has_record;
int error;
if (!sc->sa.fino_cur)
return;
agino = XFS_INO_TO_AGINO(sc->mp, ino);
/*
* Try to get the finobt record. If we can't get it, then we're
* in good shape.
*/
error = xfs_inobt_lookup(sc->sa.fino_cur, agino, XFS_LOOKUP_LE,
&has_record);
if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.fino_cur) ||
!has_record)
return;
error = xfs_inobt_get_rec(sc->sa.fino_cur, &rec, &has_record);
if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.fino_cur) ||
!has_record)
return;
/*
* Otherwise, make sure this record either doesn't cover this inode,
* or that it does but it's marked present.
*/
if (rec.ir_startino > agino ||
rec.ir_startino + XFS_INODES_PER_CHUNK <= agino)
return;
if (rec.ir_free & XFS_INOBT_MASK(agino - rec.ir_startino))
xfs_scrub_btree_xref_set_corrupt(sc, sc->sa.fino_cur, 0);
}
/* Cross-reference with the other btrees. */
STATIC void
xfs_scrub_inode_xref(
@@ -599,6 +647,7 @@ xfs_scrub_inode_xref(
return;
xfs_scrub_xref_is_used_space(sc, agbno, 1);
xfs_scrub_inode_xref_finobt(sc, ino);
xfs_scrub_ag_free(sc, &sc->sa);
}