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authorDave Chinner <dchinner@redhat.com>2018-06-03 16:12:16 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2018-06-03 16:12:16 -0700
commit9f96cc958e8ae9864e6d597a5f3e80b5fca35ae4 (patch)
treea4685a6c40ebe1e8dad9b59a86286bf487d5cd32 /fs
parentafd9d6a1df75807684fa40dab77c52e104e5c74b (diff)
downloadlinux-9f96cc958e8ae9864e6d597a5f3e80b5fca35ae4.tar.bz2
xfs: verify AGI unlinked list contains valid blocks
The heads of tha AGI unlinked list are only scanned on debug kernels when the verifier runs. Change that to always scan the heads and validate that the inode numbers are valid. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/xfs/libxfs/xfs_ialloc.c23
1 files changed, 8 insertions, 15 deletions
diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c
index 4ca4ff7a757d..48296adbb0fb 100644
--- a/fs/xfs/libxfs/xfs_ialloc.c
+++ b/fs/xfs/libxfs/xfs_ialloc.c
@@ -2477,26 +2477,13 @@ xfs_ialloc_log_agi(
}
}
-#ifdef DEBUG
-STATIC void
-xfs_check_agi_unlinked(
- struct xfs_agi *agi)
-{
- int i;
-
- for (i = 0; i < XFS_AGI_UNLINKED_BUCKETS; i++)
- ASSERT(agi->agi_unlinked[i]);
-}
-#else
-#define xfs_check_agi_unlinked(agi)
-#endif
-
static xfs_failaddr_t
xfs_agi_verify(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_target->bt_mount;
struct xfs_agi *agi = XFS_BUF_TO_AGI(bp);
+ int i;
if (xfs_sb_version_hascrc(&mp->m_sb)) {
if (!uuid_equal(&agi->agi_uuid, &mp->m_sb.sb_meta_uuid))
@@ -2532,7 +2519,13 @@ xfs_agi_verify(
if (bp->b_pag && be32_to_cpu(agi->agi_seqno) != bp->b_pag->pag_agno)
return __this_address;
- xfs_check_agi_unlinked(agi);
+ for (i = 0; i < XFS_AGI_UNLINKED_BUCKETS; i++) {
+ if (agi->agi_unlinked[i] == NULLAGINO)
+ continue;
+ if (!xfs_verify_ino(mp, be32_to_cpu(agi->agi_unlinked[i])))
+ return __this_address;
+ }
+
return NULL;
}