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rbd: fetch object order before using it 

rbd_dev_v2_header_onetime() fetches striping information, and
checks whether the image can be read by compariing the stripe unit
to the object size. It determines the object size by shifting
the object order, which is 0 at this point since it has not been
read yet. Move the call to get the image size and object order
before rbd_dev_v2_header_onetime() so it is set before use.

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
This commit is contained in:
Josh Durgin 2013-06-12 14:43:10 -07:00 committed by Sage Weil
parent 3a96d5cd7b
commit 1617e40c1e
1 changed files with 4 additions and 4 deletions
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8
drivers/block/rbd.c
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@ -4245,6 +4245,10 @@ static int rbd_dev_v2_header_info(struct rbd_device *rbd_dev)
down_write(&rbd_dev->header_rwsem);
ret = rbd_dev_v2_image_size(rbd_dev);
if (ret)
goto out;
if (first_time) {
ret = rbd_dev_v2_header_onetime(rbd_dev);
if (ret)
@ -4278,10 +4282,6 @@ static int rbd_dev_v2_header_info(struct rbd_device *rbd_dev)
"is EXPERIMENTAL!");
}
ret = rbd_dev_v2_image_size(rbd_dev);
if (ret)
goto out;
if (rbd_dev->spec->snap_id == CEPH_NOSNAP)
if (rbd_dev->mapping.size != rbd_dev->header.image_size)
rbd_dev->mapping.size = rbd_dev->header.image_size;