redonkable/alistair23-linux
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xfs: cross-reference the block mappings when possible

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Use an inode's block mappings to cross-reference inode block counters.

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 18:53:10 -08:00
parent 46d9bfb5e7
commit 561f648ab2
1 changed files with 34 additions and 0 deletions
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34
fs/xfs/scrub/inode.c
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@ -37,6 +37,8 @@
#include "xfs_da_format.h"
#include "xfs_reflink.h"
#include "xfs_rmap.h"
#include "xfs_bmap.h"
#include "xfs_bmap_util.h"
#include "scrub/xfs_scrub.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
@ -626,6 +628,37 @@ xfs_scrub_inode_xref_finobt(
xfs_scrub_btree_xref_set_corrupt(sc, sc->sa.fino_cur, 0);
}
/* Cross reference the inode fields with the forks. */
STATIC void
xfs_scrub_inode_xref_bmap(
struct xfs_scrub_context *sc,
struct xfs_dinode *dip)
{
xfs_extnum_t nextents;
xfs_filblks_t count;
xfs_filblks_t acount;
int error;
/* Walk all the extents to check nextents/naextents/nblocks. */
error = xfs_bmap_count_blocks(sc->tp, sc->ip, XFS_DATA_FORK,
&nextents, &count);
if (!xfs_scrub_should_check_xref(sc, &error, NULL))
return;
if (nextents < be32_to_cpu(dip->di_nextents))
xfs_scrub_ino_xref_set_corrupt(sc, sc->ip->i_ino, NULL);
error = xfs_bmap_count_blocks(sc->tp, sc->ip, XFS_ATTR_FORK,
&nextents, &acount);
if (!xfs_scrub_should_check_xref(sc, &error, NULL))
return;
if (nextents != be16_to_cpu(dip->di_anextents))
xfs_scrub_ino_xref_set_corrupt(sc, sc->ip->i_ino, NULL);
/* Check nblocks against the inode. */
if (count + acount != be64_to_cpu(dip->di_nblocks))
xfs_scrub_ino_xref_set_corrupt(sc, sc->ip->i_ino, NULL);
}
/* Cross-reference with the other btrees. */
STATIC void
xfs_scrub_inode_xref(
@ -653,6 +686,7 @@ xfs_scrub_inode_xref(
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_INODES);
xfs_scrub_xref_is_owned_by(sc, agbno, 1, &oinfo);
xfs_scrub_xref_is_not_shared(sc, agbno, 1);
xfs_scrub_inode_xref_bmap(sc, dip);
xfs_scrub_ag_free(sc, &sc->sa);
}