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xfs: ensure that single-owner file blocks are not owned by others

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For any file fork mapping that can only have a single owner, make sure
that there are no other rmap owners for that mapping.  This patch
requires the more detailed checking provided by xfs_rmap_count_owners so
that we can know how many rmap records for a given range of space had a
matching owner, how many had a non-matching owner, and how many
conflicted with the records that have a matching owner.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong
2023-04-11 19:00:16 -07:00
parent 69115f775f
commit 30f8ee5e7e
1 changed files with 13 additions and 1 deletions
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14
fs/xfs/scrub/bmap.c
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@@ -308,6 +308,7 @@ xchk_bmap_iextent_xref(
struct xchk_bmap_info *info,
struct xfs_bmbt_irec *irec)
{
struct xfs_owner_info oinfo;
struct xfs_mount *mp = info->sc->mp;
xfs_agnumber_t agno;
xfs_agblock_t agbno;
@@ -328,19 +329,30 @@ xchk_bmap_iextent_xref(
xchk_bmap_xref_rmap(info, irec, agbno);
switch (info->whichfork) {
case XFS_DATA_FORK:
if (!xfs_is_reflink_inode(info->sc->ip))
if (!xfs_is_reflink_inode(info->sc->ip)) {
xfs_rmap_ino_owner(&oinfo, info->sc->ip->i_ino,
info->whichfork, irec->br_startoff);
xchk_xref_is_only_owned_by(info->sc, agbno,
irec->br_blockcount, &oinfo);
xchk_xref_is_not_shared(info->sc, agbno,
irec->br_blockcount);
}
xchk_xref_is_not_cow_staging(info->sc, agbno,
irec->br_blockcount);
break;
case XFS_ATTR_FORK:
xfs_rmap_ino_owner(&oinfo, info->sc->ip->i_ino,
info->whichfork, irec->br_startoff);
xchk_xref_is_only_owned_by(info->sc, agbno, irec->br_blockcount,
&oinfo);
xchk_xref_is_not_shared(info->sc, agbno,
irec->br_blockcount);
xchk_xref_is_not_cow_staging(info->sc, agbno,
irec->br_blockcount);
break;
case XFS_COW_FORK:
xchk_xref_is_only_owned_by(info->sc, agbno, irec->br_blockcount,
&XFS_RMAP_OINFO_COW);
xchk_xref_is_cow_staging(info->sc, agbno,
irec->br_blockcount);
xchk_xref_is_not_shared(info->sc, agbno,