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xfs: fix rtalloc rotoring when delalloc is in use

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If we're trying to allocate real space for a delalloc reservation at
offset 0, we should use the rotor to spread files across the rt volume.

Switch the rtalloc to use the XFS_ALLOC_INITIAL_USER_DATA flag that
is set for any write at startoff to make it match the behavior for
the main data device.

Based on a patch from Darrick J. Wong.

Fixes: 6a94b1acda ("xfs: reinstate delalloc for RT inodes (if sb_rextsize == 1)")
Reported-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
This commit is contained in:
Christoph Hellwig 2024-07-08 14:02:57 +02:00 committed by Chandan Babu R
parent 49cdc4e834
commit 2bf6e35354
1 changed files with 2 additions and 1 deletions
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3
fs/xfs/xfs_rtalloc.c
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@ -12,6 +12,7 @@
#include "xfs_bit.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_alloc.h"
#include "xfs_bmap.h"
#include "xfs_bmap_btree.h"
#include "xfs_bmap_util.h"
@ -1382,7 +1383,7 @@ xfs_bmap_rtalloc(
start = 0;
} else if (xfs_bmap_adjacent(ap)) {
start = xfs_rtb_to_rtx(mp, ap->blkno);
} else if (ap->eof && ap->offset == 0) {
} else if (ap->datatype & XFS_ALLOC_INITIAL_USER_DATA) {
/*
* If it's an allocation to an empty file at offset 0, pick an
* extent that will space things out in the rt area.