Copy the uuid of the filesystem to struct super_block s_uuid field, as several other filesystems already do. Copy regardless of the nouuid mount option, because other filesystems also do not guaranty uniqueness of the s_uuid field in super_block struct. Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx> --- fs/xfs/xfs_mount.c | 4 ++++ 1 file changed, 4 insertions(+) Darrick, Per your request I moved the copy above nouuid check. Cheers, Amir. diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 450bde6..4c0d8d7 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -73,6 +73,10 @@ xfs_uuid_mount( uuid_t *uuid = &mp->m_sb.sb_uuid; int hole, i; + /* Publish UUID in struct super_block */ + BUILD_BUG_ON(sizeof(mp->m_super->s_uuid) != sizeof(uuid_t)); + memcpy(&mp->m_super->s_uuid, uuid, sizeof(uuid_t)); + if (mp->m_flags & XFS_MOUNT_NOUUID) return 0; -- 2.7.4
