From: Alex Elder <elder@inktank.com>
Date: Thu, 9 May 2013 03:50:04 +0000 (-0500)
Subject: rbd: define parent image request routines
X-Git-Tag: v3.10-rc2~28^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e93f3152357ca75284284bef8eeea7d45fe1bab1;p=pandora-kernel.git

rbd: define parent image request routines

Define rbd_parent_request_create() and rbd_parent_request_destroy()
to handle the creation of parent image requests submitted for
layered image objects.  For simplicity, let rbd_img_request_put()
handle dropping the reference to any image request (parent or not),
and call whichever destructor is appropriate on the last put.

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