From ea8439899c0b15a176664df62aff928010fad276 Mon Sep 17 00:00:00 2001
From: "Darrick J. Wong" <darrick.wong@oracle.com>
Date: Sun, 8 Nov 2020 16:32:43 -0800
Subject: [PATCH] xfs: fix flags argument to rmap lookup when converting shared
 file rmaps
Git-commit: ea8439899c0b15a176664df62aff928010fad276
Patch-mainline: v5.10-rc4
References: git-fixes

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>
Acked-by: Anthony Iliopoulos <ailiop@suse.com>

---
 fs/xfs/libxfs/xfs_rmap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/xfs/libxfs/xfs_rmap.c
+++ b/fs/xfs/libxfs/xfs_rmap.c
@@ -1320,7 +1320,7 @@
 	 * 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);
 	XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done);