From: Alex Elder <elder@inktank.com>
Date: Fri, 10 May 2013 21:29:22 +0000 (-0500)
Subject: rbd: support reading parent page data for writes
X-Git-Tag: v3.10-rc2~28^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b91f09f17b2a302f07022e2f766969e2536d71b3;p=pandora-kernel.git

rbd: support reading parent page data for writes

Currently, rbd_img_obj_parent_read_full() assumes the incoming
object request contains bio data.  But if a layered image is part of
a multi-layer stack of images it will result in read requests of
page data to parent images.

This is handling the same kind of issue as was resolved by this
commit:
    5b2ab72d  rbd: support reading parent page data

This resolves:
    http://tracker.ceph.com/issues/5027

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

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