xfs: fix flags argument to rmap lookup when converting shared file rmaps

BugLink: https://bugs.launchpad.net/bugs/1905618
[ Upstream commit ea8439899c0b15a176664df62aff928010fad276 ]

Pass the same oldext argument (which contains the existing rmapping's
unwritten state) to xfs_rmap_lookup_le_range at the start of
xfs_rmap_convert_shared.  At this point in the code, flags is zero,
which means that we perform lookups using the wrong key.

Fixes: 3f165b334e51 ("xfs: convert unwritten status of reverse mappings for shared files")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/fs/xfs/libxfs/xfs_rmap.c b/fs/xfs/libxfs/xfs_rmap.c
index 38e9414878b3eb8e4feb25d5318a25b69399a502..9d3c67b654ca7295c17f484cf7f2dc3a8cfbb7a8 100644 (file)
--- a/fs/xfs/libxfs/xfs_rmap.c
+++ b/fs/xfs/libxfs/xfs_rmap.c
@@ -1379,7 +1379,7 @@ xfs_rmap_convert_shared(
         * record for our insertion point. This will also give us the record for
         * start block contiguity tests.
         */
-       error = xfs_rmap_lookup_le_range(cur, bno, owner, offset, flags,
+       error = xfs_rmap_lookup_le_range(cur, bno, owner, offset, oldext,
                        &PREV, &i);
        if (error)
                goto done;