From: Alex Elder <elder@inktank.com>
Date: Tue, 3 Jul 2012 21:01:19 +0000 (-0500)
Subject: rbd: encapsulate code that gets snapshot info
X-Git-Tag: v3.7-rc1~90^2~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cd892126c617b3837b6088bf6c097ad2def4de83;p=pandora-kernel.git

rbd: encapsulate code that gets snapshot info

Create a function that encapsulates looking up the name, size and
features related to a given snapshot, which is indicated by its
index in an rbd device's snapshot context array of snapshot ids.

This interface will be used to hide differences between the format 1
and format 2 images.

At the moment this (looking up the name anyway) is slightly less
efficient than what's done currently, but we may be able to optimize
this a bit later on by cacheing the last lookup if it proves to be a
problem.

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

Reading git-diff-tree failed