diff options
| author | Dave Chinner <dchinner@redhat.com> | 2018-06-03 16:12:16 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2018-06-03 16:12:16 -0700 |
| commit | 9f96cc958e8ae9864e6d597a5f3e80b5fca35ae4 (patch) | |
| tree | a4685a6c40ebe1e8dad9b59a86286bf487d5cd32 /fs/xfs | |
| parent | afd9d6a1df75807684fa40dab77c52e104e5c74b (diff) | |
| download | linux-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/xfs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_ialloc.c | 23 |
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; } |