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dm thin metadata: zero unused superblock uuid
author
Joe Thornber
<ejt@redhat.com>
Fri, 27 Jul 2012 14:08:11 +0000
(15:08 +0100)
committer
Alasdair G Kergon
<agk@redhat.com>
Fri, 27 Jul 2012 14:08:11 +0000
(15:08 +0100)
Zero the unused uuid when initialising the metadata superblock.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
drivers/md/dm-thin-metadata.c
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diff --git
a/drivers/md/dm-thin-metadata.c
b/drivers/md/dm-thin-metadata.c
index
934b3fc
..
9f7c1e0
100644
(file)
--- a/
drivers/md/dm-thin-metadata.c
+++ b/
drivers/md/dm-thin-metadata.c
@@
-455,6
+455,7
@@
static int __write_initial_superblock(struct dm_pool_metadata *pmd)
disk_super = dm_block_data(sblock);
disk_super->flags = 0;
+ memset(disk_super->uuid, 0, sizeof(disk_super->uuid));
disk_super->magic = cpu_to_le64(THIN_SUPERBLOCK_MAGIC);
disk_super->version = cpu_to_le32(THIN_VERSION);
disk_super->time = 0;