From be50d7c8c4c3b1cf18dbaf52a5f3b6dd584016b3 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 17 Oct 2017 14:16:23 -0700
Subject: [PATCH 19/77] xfs: refactor xfs_bmap_add_extent_hole_delay
Git-commit: 3ffc18ecd30ed21dc503fcbfb343c471a9112fb6
Patch-mainline: v4.15-rc1
References: bsc#1095344

Use xfs_iext_get_extent to find, and xfs_iext_update_extent to update
entries in the in-core extent list.  This isolates the function from
the detailed layout of the extent list, and generally makes the code
a lot more readable.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Acked-by: Nikolay Borisov <nborisov@suse.com>
---
 fs/xfs/libxfs/xfs_bmap.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index 03c61cfa3865..b651006b6c4f 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -2705,7 +2705,7 @@ xfs_bmap_add_extent_hole_delay(
 	xfs_filblks_t		oldlen=0;	/* old indirect size */
 	xfs_bmbt_irec_t		right;	/* right neighbor extent entry */
 	int			state;  /* state bits, accessed thru macros */
-	xfs_filblks_t		temp=0;	/* temp for indirect calculations */
+	xfs_filblks_t		temp;	 /* temp for indirect calculations */
 
 	ifp = XFS_IFORK_PTR(ip, whichfork);
 	state = 0;
@@ -2768,14 +2768,14 @@ xfs_bmap_add_extent_hole_delay(
 			right.br_blockcount;
 
 		trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
-		xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp);
 		oldlen = startblockval(left.br_startblock) +
 			startblockval(new->br_startblock) +
 			startblockval(right.br_startblock);
 		newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
 					 oldlen);
-		xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx),
-			nullstartblock((int)newlen));
+		left.br_startblock = nullstartblock(newlen);
+		left.br_blockcount = temp;
+		xfs_iext_update_extent(ifp, *idx, &left);
 		trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
 
 		xfs_iext_remove(ip, *idx + 1, 1, state);
@@ -2791,13 +2791,13 @@ xfs_bmap_add_extent_hole_delay(
 		temp = left.br_blockcount + new->br_blockcount;
 
 		trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
-		xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp);
 		oldlen = startblockval(left.br_startblock) +
 			startblockval(new->br_startblock);
 		newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
 					 oldlen);
-		xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx),
-			nullstartblock((int)newlen));
+		left.br_blockcount = temp;
+		left.br_startblock = nullstartblock(newlen);
+		xfs_iext_update_extent(ifp, *idx, &left);
 		trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
 		break;
 
@@ -2813,9 +2813,10 @@ xfs_bmap_add_extent_hole_delay(
 			startblockval(right.br_startblock);
 		newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
 					 oldlen);
-		xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx),
-			new->br_startoff,
-			nullstartblock((int)newlen), temp, right.br_state);
+		right.br_startoff = new->br_startoff;
+		right.br_startblock = nullstartblock(newlen);
+		right.br_blockcount = temp;
+		xfs_iext_update_extent(ifp, *idx, &right);
 		trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
 		break;
 
-- 
2.7.4