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xfs: cleanup fdblock/frextent accounting in xfs_bmap_del_extent_delay

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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>
This commit is contained in:
Christoph Hellwig 2024-04-22 13:20:14 +02:00 committed by Chandan Babu R
parent dc1b17a25c
commit 7e77d57a1f
1 changed files with 10 additions and 10 deletions
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20
fs/xfs/libxfs/xfs_bmap.c
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@ -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;
}