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authorAmir Goldstein <amir73il@gmail.com>2017-04-28 08:10:53 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2017-04-28 08:10:53 -0700
commit8f720d9f892e0e223dab8400f03130bc208c72e7 (patch)
tree7d14d367b051973f7415c780e45611895cc43593 /fs/xfs
parent3c3781951c9a155a56e5eed567349118374cc315 (diff)
xfs: publish UUID in struct super_block
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@gmail.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_mount.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 688ebff1f663..2eaf81859166 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;