124 	struct vhost_net_ubuf_ref *ubufs;  member
236 	struct vhost_net_ubuf_ref *ubufs;  in vhost_net_ubuf_alloc()  local
240 	ubufs = kmalloc(sizeof(*ubufs), GFP_KERNEL);  in vhost_net_ubuf_alloc()
241 	if (!ubufs)  in vhost_net_ubuf_alloc()
243 	atomic_set(&ubufs->refcount, 1);  in vhost_net_ubuf_alloc()
244 	init_waitqueue_head(&ubufs->wait);  in vhost_net_ubuf_alloc()
245 	ubufs->vq = vq;  in vhost_net_ubuf_alloc()
246 	return ubufs;  in vhost_net_ubuf_alloc()
249 static int vhost_net_ubuf_put(struct vhost_net_ubuf_ref *ubufs)  in vhost_net_ubuf_put()  argument
251 	int r = atomic_sub_return(1, &ubufs->refcount);  in vhost_net_ubuf_put()
253 		wake_up(&ubufs->wait);  in vhost_net_ubuf_put()
257 static void vhost_net_ubuf_put_and_wait(struct vhost_net_ubuf_ref *ubufs)  in vhost_net_ubuf_put_and_wait()  argument
259 	vhost_net_ubuf_put(ubufs);  in vhost_net_ubuf_put_and_wait()
260 	wait_event(ubufs->wait, !atomic_read(&ubufs->refcount));  in vhost_net_ubuf_put_and_wait()
263 static void vhost_net_ubuf_put_wait_and_free(struct vhost_net_ubuf_ref *ubufs)  in vhost_net_ubuf_put_wait_and_free()  argument
265 	vhost_net_ubuf_put_and_wait(ubufs);  in vhost_net_ubuf_put_wait_and_free()
266 	kfree(ubufs);  in vhost_net_ubuf_put_wait_and_free()
311 		n->vqs[i].ubufs = NULL;  in vhost_net_vq_reset()
386 	struct vhost_net_ubuf_ref *ubufs = ubuf->ctx;  in vhost_zerocopy_callback()  local
387 	struct vhost_virtqueue *vq = ubufs->vq;  in vhost_zerocopy_callback()
395 	cnt = vhost_net_ubuf_put(ubufs);  in vhost_zerocopy_callback()
875 	struct vhost_net_ubuf_ref *ubufs;  in handle_tx_zerocopy()  local
913 			ubuf->ctx = nvq->ubufs;  in handle_tx_zerocopy()
920 			ubufs = nvq->ubufs;  in handle_tx_zerocopy()
921 			atomic_inc(&ubufs->refcount);  in handle_tx_zerocopy()
925 			ubufs = NULL;  in handle_tx_zerocopy()
940 					vhost_net_ubuf_put(ubufs);  in handle_tx_zerocopy()
1328 		n->vqs[i].ubufs = NULL;  in vhost_net_open()
1387 	if (n->vqs[VHOST_NET_VQ_TX].ubufs) {  in vhost_net_flush()
1392 		vhost_net_ubuf_put_and_wait(n->vqs[VHOST_NET_VQ_TX].ubufs);  in vhost_net_flush()
1395 		atomic_set(&n->vqs[VHOST_NET_VQ_TX].ubufs->refcount, 1);  in vhost_net_flush()
1504 	struct vhost_net_ubuf_ref *ubufs, *oldubufs = NULL;  in vhost_net_set_backend()  local
1534 		ubufs = vhost_net_ubuf_alloc(vq,  in vhost_net_set_backend()
1536 		if (IS_ERR(ubufs)) {  in vhost_net_set_backend()
1537 			r = PTR_ERR(ubufs);  in vhost_net_set_backend()
1557 		oldubufs = nvq->ubufs;  in vhost_net_set_backend()
1558 		nvq->ubufs = ubufs;  in vhost_net_set_backend()
1585 	if (ubufs)  in vhost_net_set_backend()
1586 		vhost_net_ubuf_put_wait_and_free(ubufs);  in vhost_net_set_backend()