From: Alex Elder <elder@inktank.com>
Date: Wed, 31 Oct 2012 00:40:33 +0000 (-0500)
Subject: rbd: allow null image name
X-Git-Tag: v3.8-rc1~21^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2c0d0a10ea89456781218f458f6bf72e99d87d2a;p=pandora-kernel.git

rbd: allow null image name

We will know the image id for format 2 parent images, but won't
initially know its image name.  Avoid making the query for an image
id in rbd_dev_image_id() if it's already known.

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