From f40eb349e032bee2b6f06e9b6f1dbfae561bd30a Mon Sep 17 00:00:00 2001
From: Alex Elder <elder@inktank.com>
Date: Thu, 25 Apr 2013 15:09:42 -0500
Subject: [PATCH] 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>
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