[PATCH 034/102] xfs: show uuid when mount fails due to duplicate uuid

[Dave Chinner <david@xxxxxxxxxxxxx>]

From: Mitsuo Hayasaka <mitsuo.hayasaka.hu@xxxxxxxxxxx>

Upstream commit: 021000e59c0db2d3a8113e906bde3183c33fa84b

When a system tries to mount a filesystem (FS) using UUID, the xfs
returns -EINVAL and shows a message if a FS with the same UUID has
been already mounted. It is useful to output the duplicate UUID
with it.

Signed-off-by: Mitsuo Hayasaka <mitsuo.hayasaka.hu@xxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Cc: Ben Myers <bpm@xxxxxxx>
Cc: Alex Elder <elder@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Ben Myers <bpm@xxxxxxx>
---
 fs/xfs/xfs_mount.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 3effa7f..2f011fd 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -158,7 +158,7 @@ xfs_uuid_mount(
 
  out_duplicate:
        mutex_unlock(&xfs_uuid_table_mutex);
-       xfs_warn(mp, "Filesystem has duplicate UUID - can't mount");
+       xfs_warn(mp, "Filesystem has duplicate UUID %pU - can't mount", uuid);
        return XFS_ERROR(EINVAL);
 }
 
-- 
1.7.10