xfs: add rmap btree block detection to log recovery

Originally-From: Dave Chinner <dchinner@redhat.com>

So such blocks can be correctly identified and have their operations
structures attached to validate recovery has not resulted in a
correct block.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

fs/xfs/xfs_log_recover.c

@@ -2231,6 +2231,7 @@ xlog_recover_get_buf_lsn(
 	case XFS_ABTC_CRC_MAGIC:
 	case XFS_ABTB_MAGIC:
 	case XFS_ABTC_MAGIC:
+	case XFS_RMAP_CRC_MAGIC:
 	case XFS_IBT_CRC_MAGIC:
 	case XFS_IBT_MAGIC: {
 		struct xfs_btree_block *btb = blk;
@@ -2399,6 +2400,9 @@ xlog_recover_validate_buf_type(
 		case XFS_BMAP_MAGIC:
 			bp->b_ops = &xfs_bmbt_buf_ops;
 			break;
+		case XFS_RMAP_CRC_MAGIC:
+			bp->b_ops = &xfs_rmapbt_buf_ops;
+			break;
 		default:
 			xfs_warn(mp, "Bad btree block magic!");
 			ASSERT(0);