tree ecc78e8ffae9bfe7c26c110af69878cde2db86f1
parent 5a8ac6d9d70e1a078d04ad75a5c055b00a041d70
author Josh Durgin <jdurgin@redhat.com> 1433993325 -0700
committer Kevin Wolf <kwolf@redhat.com> 1436886923 +0200

rbd: make qemu's cache setting override any ceph setting

To be safe, when cache=none is used ceph settings should not be able
to override it to turn on caching. This was previously possible with
rbd_cache=true in the rbd device configuration or a ceph configuration
file. Similarly, rbd settings could have turned off caching when qemu
requested it, although this would just be a performance problem.

Fix this by changing rbd's cache setting to match qemu after all other
ceph settings have been applied.

Signed-off-by: Josh Durgin <jdurgin@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>