125 	struct vhost_net_ubuf_ref *ubufs;  member
235 	struct vhost_net_ubuf_ref *ubufs;  in vhost_net_ubuf_alloc()  local
239 	ubufs = kmalloc(sizeof(*ubufs), GFP_KERNEL);  in vhost_net_ubuf_alloc()
240 	if (!ubufs)  in vhost_net_ubuf_alloc()
242 	atomic_set(&ubufs->refcount, 1);  in vhost_net_ubuf_alloc()
243 	init_waitqueue_head(&ubufs->wait);  in vhost_net_ubuf_alloc()
244 	ubufs->vq = vq;  in vhost_net_ubuf_alloc()
245 	return ubufs;  in vhost_net_ubuf_alloc()
248 static int vhost_net_ubuf_put(struct vhost_net_ubuf_ref *ubufs)  in vhost_net_ubuf_put()  argument
250 	int r = atomic_sub_return(1, &ubufs->refcount);  in vhost_net_ubuf_put()
252 		wake_up(&ubufs->wait);  in vhost_net_ubuf_put()
256 static void vhost_net_ubuf_put_and_wait(struct vhost_net_ubuf_ref *ubufs)  in vhost_net_ubuf_put_and_wait()  argument
258 	vhost_net_ubuf_put(ubufs);  in vhost_net_ubuf_put_and_wait()
259 	wait_event(ubufs->wait, !atomic_read(&ubufs->refcount));  in vhost_net_ubuf_put_and_wait()
262 static void vhost_net_ubuf_put_wait_and_free(struct vhost_net_ubuf_ref *ubufs)  in vhost_net_ubuf_put_wait_and_free()  argument
264 	vhost_net_ubuf_put_and_wait(ubufs);  in vhost_net_ubuf_put_wait_and_free()
265 	kfree(ubufs);  in vhost_net_ubuf_put_wait_and_free()
310 		n->vqs[i].ubufs = NULL;  in vhost_net_vq_reset()
387 	struct vhost_net_ubuf_ref *ubufs = ubuf->ctx;  in vhost_zerocopy_complete()  local
388 	struct vhost_virtqueue *vq = ubufs->vq;  in vhost_zerocopy_complete()
396 	cnt = vhost_net_ubuf_put(ubufs);  in vhost_zerocopy_complete()
847 	struct vhost_net_ubuf_ref *ubufs;  in handle_tx_zerocopy()  local
884 			ubuf->ctx = nvq->ubufs;  in handle_tx_zerocopy()
893 			ubufs = nvq->ubufs;  in handle_tx_zerocopy()
894 			atomic_inc(&ubufs->refcount);  in handle_tx_zerocopy()
898 			ubufs = NULL;  in handle_tx_zerocopy()
914 					vhost_net_ubuf_put(ubufs);  in handle_tx_zerocopy()
1310 		n->vqs[i].ubufs = NULL;  in vhost_net_open()
1363 	if (n->vqs[VHOST_NET_VQ_TX].ubufs) {  in vhost_net_flush()
1368 		vhost_net_ubuf_put_and_wait(n->vqs[VHOST_NET_VQ_TX].ubufs);  in vhost_net_flush()
1371 		atomic_set(&n->vqs[VHOST_NET_VQ_TX].ubufs->refcount, 1);  in vhost_net_flush()
1479 	struct vhost_net_ubuf_ref *ubufs, *oldubufs = NULL;  in vhost_net_set_backend()  local
1512 		ubufs = vhost_net_ubuf_alloc(vq,  in vhost_net_set_backend()
1514 		if (IS_ERR(ubufs)) {  in vhost_net_set_backend()
1515 			r = PTR_ERR(ubufs);  in vhost_net_set_backend()
1535 		oldubufs = nvq->ubufs;  in vhost_net_set_backend()
1536 		nvq->ubufs = ubufs;  in vhost_net_set_backend()
1563 	if (ubufs)  in vhost_net_set_backend()
1564 		vhost_net_ubuf_put_wait_and_free(ubufs);  in vhost_net_set_backend()