From: Alex Elder <elder@inktank.com>
Date: Tue, 3 Jul 2012 21:01:19 +0000 (-0500)
Subject: rbd: add code to get the size of a v2 rbd image
X-Git-Tag: v3.7-rc1~90^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9d475de5d12af8ac4c2101807e0a889ac7389c5a;p=pandora-kernel.git

rbd: add code to get the size of a v2 rbd image

The size of an rbd format 2 image is fetched from the server using a
"get_size" method.  The same method is used for getting the size of
a snapshot, so structure this addition with a generic helper routine
that we can get this information for either.

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