diff options
| author | Cornelia Huck <cornelia.huck@de.ibm.com> | 2014-06-18 17:58:30 +0800 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2014-07-01 09:15:02 +0200 |
| commit | a9968c77d5a56211ae22be2e6a1dcb07f2016010 (patch) | |
| tree | de7003b4ba08fe747b36a015c24a59744a7280aa | |
| parent | dc80ca6cd6cafdee174af3c883d85e19b7fd70a5 (diff) | |
dataplane: bail out on unsupported transport
If the virtio transport does not support notifiers (like s390-virtio),
we can't use dataplane. Bail out early and let the user know what is
wrong.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| -rw-r--r-- | hw/block/dataplane/virtio-blk.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/hw/block/dataplane/virtio-blk.c b/hw/block/dataplane/virtio-blk.c index 09bd2c70ab..f6e1a5d919 100644 --- a/hw/block/dataplane/virtio-blk.c +++ b/hw/block/dataplane/virtio-blk.c @@ -127,6 +127,8 @@ void virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk, VirtIOBlockDataPlane *s; VirtIOBlock *vblk = VIRTIO_BLK(vdev); Error *local_err = NULL; + BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev))); + VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus); *dataplane = NULL; @@ -134,6 +136,14 @@ void virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk, return; } + /* Don't try if transport does not support notifiers. */ + if (!k->set_guest_notifiers || !k->set_host_notifier) { + error_setg(errp, + "device is incompatible with x-data-plane " + "(transport does not support notifiers)"); + return; + } + /* If dataplane is (re-)enabled while the guest is running there could be * block jobs that can conflict. */ |