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xfs: skip always_cow inodes in xfs_reflink_trim_around_shared

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xfs_reflink_trim_around_shared tries to find shared blocks in the
refcount btree.  Always_cow inodes don't have that tree, so don't
bother.

For the existing always_cow code this is a minor optimization.  For
the upcoming zoned code that can do COW without the rtreflink code it
avoids triggering a NULL pointer dereference.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
This commit is contained in:
Christoph Hellwig 2023-10-14 07:50:35 +02:00
parent 7c879c8275
commit 8ae4c8cec0
1 changed files with 1 additions and 1 deletions
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2
fs/xfs/xfs_reflink.c
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@ -235,7 +235,7 @@ xfs_reflink_trim_around_shared(
int error = 0;
/* Holes, unwritten, and delalloc extents cannot be shared */
if (!xfs_is_cow_inode(ip) || !xfs_bmap_is_written_extent(irec)) {
if (!xfs_is_reflink_inode(ip) || !xfs_bmap_is_written_extent(irec)) {
*shared = false;
return 0;
}