qemu_malloc/qemu_free no longer exist after this commit.
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Variable 'snap' is assigned a value that is never used.
Remove snap and the related code.

Cc: Christian Brunner <chb@muc.de>
Cc: Josh Durgin <josh.durgin@dreamhost.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: NStefan Weil <weil@mail.berlios.de>
Reviewed-by: NJosh Durgin <josh.durgin@dreamhost.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Reviewed-by: NChristian Brunner <chb@muc.de>
Signed-off-by: NJosh Durgin <josh.durgin@dreamhost.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

If scheduling fails, the number of outstanding I/Os must be correct,
or there will be a hang when waiting for everything to be flushed.
Reviewed-by: NChristian Brunner <chb@muc.de>
Reported-by: NStefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: NJosh Durgin <josh.durgin@dreamhost.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

The new format is rbd:pool/image[@snapshot][:option1=value1[:option2=value2...]]
Each option is used to configure rados, and may be any Ceph option, or "conf".
The "conf" option specifies a Ceph configuration file to read.

This allows rbd volumes from more than one Ceph cluster to be used by
specifying different monitor addresses, as well as having different
logging levels or locations for different volumes.
Reviewed-by: NChristian Brunner <chb@muc.de>
Signed-off-by: NJosh Durgin <josh.durgin@dreamhost.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

librbd stacks on top of librados to provide access
to rbd images.

Using librbd simplifies the qemu code, and allows
qemu to use new versions of the rbd format
with few (if any) changes.
Reviewed-by: NChristian Brunner <chb@muc.de>
Signed-off-by: NJosh Durgin <josh.durgin@dreamhost.com>
Signed-off-by: NYehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

RBD is an block driver for the distributed file system Ceph
(http://ceph.newdream.net/). This driver uses librados (which is part
of the Ceph server) for direct access to the Ceph object store and is
running entirely in userspace (Yehuda also wrote a driver for the
linux kernel, that can be used to access rbd volumes as a block
device).
Signed-off-by: NYehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: NChristian Brunner <chb@muc.de>
Reviewed-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>