125 	struct vhost_net_ubuf_ref *ubufs;  member
237 	struct vhost_net_ubuf_ref *ubufs;  in vhost_net_ubuf_alloc()  local
241 	ubufs = kmalloc(sizeof(*ubufs), GFP_KERNEL);  in vhost_net_ubuf_alloc()
242 	if (!ubufs)  in vhost_net_ubuf_alloc()
244 	atomic_set(&ubufs->refcount, 1);  in vhost_net_ubuf_alloc()
245 	init_waitqueue_head(&ubufs->wait);  in vhost_net_ubuf_alloc()
246 	ubufs->vq = vq;  in vhost_net_ubuf_alloc()
247 	return ubufs;  in vhost_net_ubuf_alloc()
250 static int vhost_net_ubuf_put(struct vhost_net_ubuf_ref *ubufs)  in vhost_net_ubuf_put()  argument
252 	int r = atomic_sub_return(1, &ubufs->refcount);  in vhost_net_ubuf_put()
254 		wake_up(&ubufs->wait);  in vhost_net_ubuf_put()
258 static void vhost_net_ubuf_put_and_wait(struct vhost_net_ubuf_ref *ubufs)  in vhost_net_ubuf_put_and_wait()  argument
260 	vhost_net_ubuf_put(ubufs);  in vhost_net_ubuf_put_and_wait()
261 	wait_event(ubufs->wait, !atomic_read(&ubufs->refcount));  in vhost_net_ubuf_put_and_wait()
264 static void vhost_net_ubuf_put_wait_and_free(struct vhost_net_ubuf_ref *ubufs)  in vhost_net_ubuf_put_wait_and_free()  argument
266 	vhost_net_ubuf_put_and_wait(ubufs);  in vhost_net_ubuf_put_wait_and_free()
267 	kfree(ubufs);  in vhost_net_ubuf_put_wait_and_free()
312 		n->vqs[i].ubufs = NULL;  in vhost_net_vq_reset()
389 	struct vhost_net_ubuf_ref *ubufs = ubuf->ctx;  in vhost_zerocopy_callback()  local
390 	struct vhost_virtqueue *vq = ubufs->vq;  in vhost_zerocopy_callback()
398 	cnt = vhost_net_ubuf_put(ubufs);  in vhost_zerocopy_callback()
875 	struct vhost_net_ubuf_ref *ubufs;  in handle_tx_zerocopy()  local
912 			ubuf->ctx = nvq->ubufs;  in handle_tx_zerocopy()
921 			ubufs = nvq->ubufs;  in handle_tx_zerocopy()
922 			atomic_inc(&ubufs->refcount);  in handle_tx_zerocopy()
926 			ubufs = NULL;  in handle_tx_zerocopy()
942 					vhost_net_ubuf_put(ubufs);  in handle_tx_zerocopy()
1335 		n->vqs[i].ubufs = NULL;  in vhost_net_open()
1389 	if (n->vqs[VHOST_NET_VQ_TX].ubufs) {  in vhost_net_flush()
1394 		vhost_net_ubuf_put_and_wait(n->vqs[VHOST_NET_VQ_TX].ubufs);  in vhost_net_flush()
1397 		atomic_set(&n->vqs[VHOST_NET_VQ_TX].ubufs->refcount, 1);  in vhost_net_flush()
1506 	struct vhost_net_ubuf_ref *ubufs, *oldubufs = NULL;  in vhost_net_set_backend()  local
1539 		ubufs = vhost_net_ubuf_alloc(vq,  in vhost_net_set_backend()
1541 		if (IS_ERR(ubufs)) {  in vhost_net_set_backend()
1542 			r = PTR_ERR(ubufs);  in vhost_net_set_backend()
1562 		oldubufs = nvq->ubufs;  in vhost_net_set_backend()
1563 		nvq->ubufs = ubufs;  in vhost_net_set_backend()
1590 	if (ubufs)  in vhost_net_set_backend()
1591 		vhost_net_ubuf_put_wait_and_free(ubufs);  in vhost_net_set_backend()