Commit 8f720d9f authored Apr 28, 2017 by Amir Goldstein Committed by Darrick J. Wong Apr 28, 2017

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>

parent 3c378195

fs/xfs/xfs_mount.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -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;