commit 5b2ab72d367d2682c1a237448fbc1595881a88fa
author Alex Elder <elder@inktank.com> Mon May 06 17:40:33 2013 -0500
committer Alex Elder <elder@inktank.com> Wed May 08 20:16:25 2013 -0500
tree 8a5e066888a1847fe9f22f1be6ced3a0ff90ef32
parent 91c6febb3817be576785ef06aeaaa8ed423e0a2a

rbd: support reading parent page data

Currently, rbd_img_parent_read() 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.

Fortunately, it's not hard to add support for page data.

This resolves:
    http://tracker.ceph.com/issues/4939

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