commit f40eb349e032bee2b6f06e9b6f1dbfae561bd30a
author Alex Elder <elder@inktank.com> Thu Apr 25 15:09:42 2013 -0500
committer Sage Weil <sage@inktank.com> Wed May 01 21:19:31 2013 -0700
tree 71d11c256505ef1e529a04ace59968c2069f956b
parent 6e584f5244060edc77141700d814a2af7d697685

rbd: use rbd_obj_method_sync() return value

Now that rbd_obj_method_sync() returns the number of bytes
returned by the method call, that value should be used by
callers to ensure we don't overrun the valid portion of the
buffer.

Fix the two spots that remained that weren't doing that,
rbd_dev_image_name() and rbd_dev_v2_snap_name().

Rearrange the error path slightly in rbd_dev_v2_snap_name().

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>