From: Alex Elder <elder@inktank.com>
Date: Sat, 14 Jul 2012 01:35:12 +0000 (-0500)
Subject: rbd: add an rbd features field
X-Git-Tag: v3.7-rc1~90^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=34b131849feb359f183907b467e9aa4d652b1baa;p=pandora-kernel.git

rbd: add an rbd features field

Record the features values for each rbd image and each of its
snapshots.  This is really something that only becomes meaningful
for version 2 images, so this is just putting in place code
that will form common infrastructure.

It may be useful to expand the sysfs entries--and therefore the
information we maintain--for the image and for each snapshot.
But I'm going to hold off doing that until we start making
active use of the feature bits.

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