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xfs: don't allocate COW extents when unsharing a hole

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It doesn't make sense to allocate a COW extent when unsharing a hole
because holes cannot be shared.

Fixes: 1f1397b721 ("xfs: don't allocate into the data fork for an unshare request")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/172796813277.1131942.5486112889531210260.stgit@frogsfrogsfrogs
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Darrick J. Wong 2024-10-03 08:09:01 -07:00 • committed by Christian Brauner
parent a311a08a42
commit b8c4076db5
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GPG key ID: 91C61BC06578DCA2
1 changed files with 1 additions and 1 deletions
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2
fs/xfs/xfs_iomap.c
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@ -707,7 +707,7 @@ imap_needs_cow(
return false;
/* when zeroing we don't have to COW holes or unwritten extents */
if (flags & IOMAP_ZERO) {
if (flags & (IOMAP_UNSHARE | IOMAP_ZERO)) {
if (!nimaps ||
imap->br_startblock == HOLESTARTBLOCK ||
imap->br_state == XFS_EXT_UNWRITTEN)