xfs: combine iunlink inode update functions

Combine the logging of the inode unlink list update into the
calling function that looks up the buffer we end up logging. These
do not need to be separate functions as they are both short, simple
operations and there's only a single call path through them. This
new function will end up being the core of the iunlink log item
processing...
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

fs/xfs/xfs_inode.c

@@ -1905,38 +1905,9 @@ xfs_iunlink_update_bucket(
 	return 0;
 }
 
-/* Set an on-disk inode's next_unlinked pointer. */
-STATIC void
-xfs_iunlink_update_dinode(
-	struct xfs_trans	*tp,
-	struct xfs_perag	*pag,
-	xfs_agino_t		agino,
-	struct xfs_buf		*ibp,
-	struct xfs_dinode	*dip,
-	struct xfs_imap		*imap,
-	xfs_agino_t		next_agino)
-{
-	struct xfs_mount	*mp = tp->t_mountp;
-	int			offset;
-
-	ASSERT(xfs_verify_agino_or_null(pag, next_agino));
-
-	trace_xfs_iunlink_update_dinode(mp, pag->pag_agno, agino,
-			be32_to_cpu(dip->di_next_unlinked), next_agino);
-
-	dip->di_next_unlinked = cpu_to_be32(next_agino);
-	offset = imap->im_boffset +
-			offsetof(struct xfs_dinode, di_next_unlinked);
-
-	/* need to recalc the inode CRC if appropriate */
-	xfs_dinode_calc_crc(mp, dip);
-	xfs_trans_inode_buf(tp, ibp);
-	xfs_trans_log_buf(tp, ibp, offset, offset + sizeof(xfs_agino_t) - 1);
-}
-
 /* Set an in-core inode's unlinked pointer and return the old value. */
 static int
-xfs_iunlink_update_inode(
+xfs_iunlink_log_inode(
 	struct xfs_trans	*tp,
 	struct xfs_inode	*ip,
 	struct xfs_perag	*pag,
@@ -1946,6 +1917,7 @@ xfs_iunlink_update_inode(
 	struct xfs_dinode	*dip;
 	struct xfs_buf		*ibp;
 	xfs_agino_t		old_value;
+	int			offset;
 	int			error;
 
 	ASSERT(xfs_verify_agino_or_null(pag, next_agino));
@@ -1979,9 +1951,17 @@ xfs_iunlink_update_inode(
 		goto out;
 	}
 
-	/* Ok, update the new pointer. */
-	xfs_iunlink_update_dinode(tp, pag, XFS_INO_TO_AGINO(mp, ip->i_ino),
-			ibp, dip, &ip->i_imap, next_agino);
+	trace_xfs_iunlink_update_dinode(mp, pag->pag_agno,
+			XFS_INO_TO_AGINO(mp, ip->i_ino),
+			be32_to_cpu(dip->di_next_unlinked), next_agino);
+
+	dip->di_next_unlinked = cpu_to_be32(next_agino);
+	offset = ip->i_imap.im_boffset +
+			offsetof(struct xfs_dinode, di_next_unlinked);
+
+	xfs_dinode_calc_crc(mp, dip);
+	xfs_trans_inode_buf(tp, ibp);
+	xfs_trans_log_buf(tp, ibp, offset, offset + sizeof(xfs_agino_t) - 1);
 	return 0;
 out:
 	xfs_trans_brelse(tp, ibp);
@@ -2027,7 +2007,7 @@ xfs_iunlink_insert_inode(
 		 * There is already another inode in the bucket, so point this
 		 * inode to the current head of the list.
 		 */
-		error = xfs_iunlink_update_inode(tp, ip, pag, next_agino);
+		error = xfs_iunlink_log_inode(tp, ip, pag, next_agino);
 		if (error)
 			return error;
 		ip->i_next_unlinked = next_agino;
@@ -2103,7 +2083,7 @@ xfs_iunlink_remove_inode(
 	 * the old pointer value so that we can update whatever was previous
 	 * to us in the list to point to whatever was next in the list.
 	 */
-	error = xfs_iunlink_update_inode(tp, ip, pag, NULLAGINO);
+	error = xfs_iunlink_log_inode(tp, ip, pag, NULLAGINO);
 	if (error)
 		return error;
 
@@ -2123,7 +2103,7 @@ xfs_iunlink_remove_inode(
 		if (!prev_ip)
 			return -EFSCORRUPTED;
 
-		error = xfs_iunlink_update_inode(tp, prev_ip, pag,
+		error = xfs_iunlink_log_inode(tp, prev_ip, pag,
 				ip->i_next_unlinked);
 		prev_ip->i_next_unlinked = ip->i_next_unlinked;
 	} else {