xfs: remove redundant checks from xfs_da_read_buf

All of the verification checks of magic numbers are now done by
verifiers, so ther eis no need to check them again once the buffer
has been successfully read. If the magic number is bad, it won't
even get to that code to verify it so it really serves no purpose at
all anymore. Remove it.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>

1 files changed, 0 insertions, 41 deletions

diff --git a/fs/xfs/xfs_da_btree.c b/fs/xfs/xfs_da_btree.c
index 6cc5f6785a77..99b980db3419 100644
--- a/fs/xfs/xfs_da_btree.c
+++ b/fs/xfs/xfs_da_btree.c
@@ -2625,47 +2625,6 @@ xfs_da_read_buf(
                 xfs_buf_set_ref(bp, XFS_ATTR_BTREE_REF);
         else
                 xfs_buf_set_ref(bp, XFS_DIR_BTREE_REF);
-
-        /*
-         * This verification code will be moved to a CRC verification callback
-         * function so just leave it here unchanged until then.
-         */
-        {
-                xfs_dir2_data_hdr_t     *hdr = bp->b_addr;
-                xfs_dir2_free_t         *free = bp->b_addr;
-                xfs_da_blkinfo_t        *info = bp->b_addr;
-                uint                    magic, magic1;
-                struct xfs_mount        *mp = dp->i_mount;
-
-                magic = be16_to_cpu(info->magic);
-                magic1 = be32_to_cpu(hdr->magic);
-                if (unlikely(
-                    XFS_TEST_ERROR((magic != XFS_DA_NODE_MAGIC) &&
-                                   (magic != XFS_DA3_NODE_MAGIC) &&
-                                   (magic != XFS_ATTR_LEAF_MAGIC) &&
-                                   (magic != XFS_ATTR3_LEAF_MAGIC) &&
-                                   (magic != XFS_DIR2_LEAF1_MAGIC) &&
-                                   (magic != XFS_DIR3_LEAF1_MAGIC) &&
-                                   (magic != XFS_DIR2_LEAFN_MAGIC) &&
-                                   (magic != XFS_DIR3_LEAFN_MAGIC) &&
-                                   (magic1 != XFS_DIR2_BLOCK_MAGIC) &&
-                                   (magic1 != XFS_DIR3_BLOCK_MAGIC) &&
-                                   (magic1 != XFS_DIR2_DATA_MAGIC) &&
-                                   (magic1 != XFS_DIR3_DATA_MAGIC) &&
-                                   (free->hdr.magic !=
-                                        cpu_to_be32(XFS_DIR2_FREE_MAGIC)) &&
-                                   (free->hdr.magic !=
-                                        cpu_to_be32(XFS_DIR3_FREE_MAGIC)),
-                                mp, XFS_ERRTAG_DA_READ_BUF,
-                                XFS_RANDOM_DA_READ_BUF))) {
-                        trace_xfs_da_btree_corrupt(bp, _RET_IP_);
-                        XFS_CORRUPTION_ERROR("xfs_da_do_buf(2)",
-                                             XFS_ERRLEVEL_LOW, mp, info);
-                        error = XFS_ERROR(EFSCORRUPTED);
-                        xfs_trans_brelse(trans, bp);
-                        goto out_free;
-                }
-        }
         *bpp = bp;
 out_free:
         if (mapp != &map)