From 9f96cc958e8ae9864e6d597a5f3e80b5fca35ae4 Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Sun, 3 Jun 2018 16:12:16 -0700 Subject: 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 Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong --- fs/xfs/libxfs/xfs_ialloc.c | 23 ++++++++--------------- 1 file changed, 8 insertions(+), 15 deletions(-) (limited to 'fs') 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; } -- cgit v1.2.3