From 7e77d57a1fea5f6bfe166210385ba9f227a606d1 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 22 Apr 2024 13:20:14 +0200
Subject: [PATCH] xfs: cleanup fdblock/frextent accounting in
xfs_bmap_del_extent_delay
The code to account fdblocks and frextents in xfs_bmap_del_extent_delay
is a bit weird in that it accounts frextents before the iext tree
manipulations and fdblocks after it. Given that the iext tree
manipulations cannot fail currently that's not really a problem, but
still odd. Move the frextent manipulation to the end, and use a
fdblocks variable to account of the unconditional indirect blocks and
the data blocks only freed for !RT. This prepares for following
updates in the area and already makes the code more readable.
Also remove the !isrt assert given that this code clearly handles
rt extents correctly, and we'll soon reinstate delalloc support for
RT inodes.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
---
fs/xfs/libxfs/xfs_bmap.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index f14224ff4d561..d7a5ce2e4305a 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -4919,6 +4919,7 @@ xfs_bmap_del_extent_delay(
xfs_fileoff_t del_endoff, got_endoff;
xfs_filblks_t got_indlen, new_indlen, stolen;
uint32_t state = xfs_bmap_fork_to_state(whichfork);
+ uint64_t fdblocks;
int error = 0;
bool isrt;
@@ -4934,15 +4935,11 @@ xfs_bmap_del_extent_delay(
ASSERT(got->br_startoff <= del->br_startoff);
ASSERT(got_endoff >= del_endoff);
- if (isrt)
- xfs_add_frextents(mp, xfs_rtb_to_rtx(mp, del->br_blockcount));
-
/*
* Update the inode delalloc counter now and wait to update the
* sb counters as we might have to borrow some blocks for the
* indirect block accounting.
*/
- ASSERT(!isrt);
error = xfs_quota_unreserve_blkres(ip, del->br_blockcount);
if (error)
return error;
@@ -5019,12 +5016,15 @@ xfs_bmap_del_extent_delay(
ASSERT(da_old >= da_new);
da_diff = da_old - da_new;
- if (!isrt)
- da_diff += del->br_blockcount;
- if (da_diff) {
- xfs_add_fdblocks(mp, da_diff);
- xfs_mod_delalloc(mp, -da_diff);
- }
+ fdblocks = da_diff;
+
+ if (isrt)
+ xfs_add_frextents(mp, xfs_rtb_to_rtx(mp, del->br_blockcount));
+ else
+ fdblocks += del->br_blockcount;
+
+ xfs_add_fdblocks(mp, fdblocks);
+ xfs_mod_delalloc(mp, -(int64_t)fdblocks);
return error;
}
--
2.30.2