diff options
| author | Heinz Mauelshagen <heinzm@redhat.com> | 2014-10-17 13:38:50 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-21 09:22:53 -0800 |
| commit | 513f8da83b3ef6cf1475da6ef3d851286e8466fa (patch) | |
| tree | c3f9420ac5cab491dd9edc13b8a3529b5e27c1de /include/linux/ceph | |
| parent | fe30b804a20bbc3218193f0d528e9749332fb06a (diff) | |
dm raid: ensure superblock's size matches device's logical block size
commit 40d43c4b4cac4c2647bf07110d7b07d35f399a84 upstream.
The dm-raid superblock (struct dm_raid_superblock) is padded to 512
bytes and that size is being used to read it in from the metadata
device into one preallocated page.
Reading or writing this on a 512-byte sector device works fine but on
a 4096-byte sector device this fails.
Set the dm-raid superblock's size to the logical block size of the
metadata device, because IO at that size is guaranteed too work. Also
add a size check to avoid silent partial metadata loss in case the
superblock should ever grow past the logical block size or PAGE_SIZE.
[includes pointer math fix from Dan Carpenter]
Reported-by: "Liuhua Wang" <lwang@suse.com>
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/ceph')
0 files changed, 0 insertions, 0 deletions