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authorCornelia Huck <cornelia.huck@de.ibm.com>2016-06-10 11:04:10 +0200
committerMichael S. Tsirkin <mst@redhat.com>2016-06-24 08:47:35 +0300
commitb1f0a33d808fc3eb27faa93b7e032eb70c58802f (patch)
treeb1cbf0774b08727ebbcde843750901410ab8179e /hw/block/dataplane
parent6798e245a3c7e6f34f66a548a108cfa8eba79b7d (diff)
virtio-bus: have callers tolerate new host notifier api
Have vhost and dataplane use the new api for transports that have been converted. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Fam Zheng <famz@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/block/dataplane')
-rw-r--r--hw/block/dataplane/virtio-blk.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/hw/block/dataplane/virtio-blk.c b/hw/block/dataplane/virtio-blk.c
index 2073f9a270..fdf5fd1190 100644
--- a/hw/block/dataplane/virtio-blk.c
+++ b/hw/block/dataplane/virtio-blk.c
@@ -79,7 +79,8 @@ void virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *conf,
}
/* Don't try if transport does not support notifiers. */
- if (!k->set_guest_notifiers || !k->set_host_notifier) {
+ if (!k->set_guest_notifiers ||
+ (!k->set_host_notifier && !k->ioeventfd_started)) {
error_setg(errp,
"device is incompatible with dataplane "
"(transport does not support notifiers)");
@@ -157,7 +158,10 @@ void virtio_blk_data_plane_start(VirtIOBlockDataPlane *s)
s->guest_notifier = virtio_queue_get_guest_notifier(s->vq);
/* Set up virtqueue notify */
- r = k->set_host_notifier(qbus->parent, 0, true);
+ r = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), 0, true);
+ if (r == -ENOSYS) {
+ r = k->set_host_notifier(qbus->parent, 0, true);
+ }
if (r != 0) {
fprintf(stderr, "virtio-blk failed to set host notifier (%d)\n", r);
goto fail_host_notifier;
@@ -193,6 +197,7 @@ void virtio_blk_data_plane_stop(VirtIOBlockDataPlane *s)
BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(s->vdev)));
VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
VirtIOBlock *vblk = VIRTIO_BLK(s->vdev);
+ int r;
if (!vblk->dataplane_started || s->stopping) {
return;
@@ -217,7 +222,10 @@ void virtio_blk_data_plane_stop(VirtIOBlockDataPlane *s)
aio_context_release(s->ctx);
- k->set_host_notifier(qbus->parent, 0, false);
+ r = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), 0, false);
+ if (r == -ENOSYS) {
+ k->set_host_notifier(qbus->parent, 0, false);
+ }
/* Clean up guest notifier (irq) */
k->set_guest_notifiers(qbus->parent, 1, false);