Add Ceph RBD backingstore With lxc-create, this will create, map and mount a Rados blockdevice. A valid ceph.conf and ceph.client.admin.keyring is needed in /etc/ceph/ RBD mapping is not manage on reboot. Signed-off-by: Laurent Barbe <laurent@ksperis.com>

lxc-destroy: remove btrfs subvolumes Doing this requires some btrfs functions from bdev to be used in utils.c Because utils.h is imported by lxc_init.c, I had to create a new initutils.[ch] which are used by both lxc_init.c and utils.c We could instead put the btrfs functions into utils.c, which would be a shorter patch, but it really doesn't belong there. So I went the other way figuring there may be more such cases coming up of fns in utils.c needing code from bdev.c which can't go into lxc_init. Currently, if we detect a btrfs subvolume we just remove it. The st_dev on that dir is different, so we cannot detect if this is bound in from another fs easily. If we care, we should check whether this is a mountpoint, this patch doesn't do that. Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com> Acked-by: Stéphane Graber <stgraber@ubuntu.com>