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Subject[RFC PATCH] xfs: show uuid when mount fails due to duplicate uuid
Date
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@hitachi.com>
Cc: Ben Myers <bpm@sgi.com>
Cc: Alex Elder <elder@kernel.org>
---

fs/xfs/xfs_mount.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index d06afbc..6b96d6e 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -158,7 +158,10 @@ 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 - can't mount: uuid = %pU",
+ uuid);
+
return XFS_ERROR(EINVAL);
}



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