xfs: verify dinode header first
Move the v3 inode integrity information (crc, owner, metauuid) before we
look at anything else in the inode so that we don't waste time on a torn
write or a totally garbled block. This makes xfs_dinode_verify more
consistent with the other verifiers.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
index a43a370..a1ba112 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.c
+++ b/fs/xfs/libxfs/xfs_inode_buf.c
@@ -393,6 +393,19 @@ xfs_dinode_verify(
if (dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC))
return __this_address;
+ /* Verify v3 integrity information first */
+ if (dip->di_version >= 3) {
+ if (!xfs_sb_version_hascrc(&mp->m_sb))
+ return __this_address;
+ if (!xfs_verify_cksum((char *)dip, mp->m_sb.sb_inodesize,
+ XFS_DINODE_CRC_OFF))
+ return __this_address;
+ if (be64_to_cpu(dip->di_ino) != ino)
+ return __this_address;
+ if (!uuid_equal(&dip->di_uuid, &mp->m_sb.sb_meta_uuid))
+ return __this_address;
+ }
+
/* don't allow invalid i_size */
if (be64_to_cpu(dip->di_size) & (1ULL << 63))
return __this_address;
@@ -409,16 +422,6 @@ xfs_dinode_verify(
if (dip->di_version < 3)
return NULL;
- if (!xfs_sb_version_hascrc(&mp->m_sb))
- return __this_address;
- if (!xfs_verify_cksum((char *)dip, mp->m_sb.sb_inodesize,
- XFS_DINODE_CRC_OFF))
- return __this_address;
- if (be64_to_cpu(dip->di_ino) != ino)
- return __this_address;
- if (!uuid_equal(&dip->di_uuid, &mp->m_sb.sb_meta_uuid))
- return __this_address;
-
flags = be16_to_cpu(dip->di_flags);
flags2 = be64_to_cpu(dip->di_flags2);
