97 	struct vhost_net_ubuf_ref *ubufs;  member
124 	struct vhost_net_ubuf_ref *ubufs;  in vhost_net_ubuf_alloc()  local
128 	ubufs = kmalloc(sizeof(*ubufs), GFP_KERNEL);  in vhost_net_ubuf_alloc()
129 	if (!ubufs)  in vhost_net_ubuf_alloc()
131 	atomic_set(&ubufs->refcount, 1);  in vhost_net_ubuf_alloc()
132 	init_waitqueue_head(&ubufs->wait);  in vhost_net_ubuf_alloc()
133 	ubufs->vq = vq;  in vhost_net_ubuf_alloc()
134 	return ubufs;  in vhost_net_ubuf_alloc()
137 static int vhost_net_ubuf_put(struct vhost_net_ubuf_ref *ubufs)  in vhost_net_ubuf_put()  argument
139 	int r = atomic_sub_return(1, &ubufs->refcount);  in vhost_net_ubuf_put()
141 		wake_up(&ubufs->wait);  in vhost_net_ubuf_put()
145 static void vhost_net_ubuf_put_and_wait(struct vhost_net_ubuf_ref *ubufs)  in vhost_net_ubuf_put_and_wait()  argument
147 	vhost_net_ubuf_put(ubufs);  in vhost_net_ubuf_put_and_wait()
148 	wait_event(ubufs->wait, !atomic_read(&ubufs->refcount));  in vhost_net_ubuf_put_and_wait()
151 static void vhost_net_ubuf_put_wait_and_free(struct vhost_net_ubuf_ref *ubufs)  in vhost_net_ubuf_put_wait_and_free()  argument
153 	vhost_net_ubuf_put_and_wait(ubufs);  in vhost_net_ubuf_put_wait_and_free()
154 	kfree(ubufs);  in vhost_net_ubuf_put_wait_and_free()
197 		n->vqs[i].ubufs = NULL;  in vhost_net_vq_reset()
266 	struct vhost_net_ubuf_ref *ubufs = ubuf->ctx;  in vhost_zerocopy_callback()  local
267 	struct vhost_virtqueue *vq = ubufs->vq;  in vhost_zerocopy_callback()
275 	cnt = vhost_net_ubuf_put(ubufs);  in vhost_zerocopy_callback()
309 	struct vhost_net_ubuf_ref *uninitialized_var(ubufs);  in handle_tx()
320 	zcopy = nvq->ubufs;  in handle_tx()
380 			ubuf->ctx = nvq->ubufs;  in handle_tx()
384 			ubufs = nvq->ubufs;  in handle_tx()
385 			atomic_inc(&ubufs->refcount);  in handle_tx()
389 			ubufs = NULL;  in handle_tx()
395 				vhost_net_ubuf_put(ubufs);  in handle_tx()
700 		n->vqs[i].ubufs = NULL;  in vhost_net_open()
773 	if (n->vqs[VHOST_NET_VQ_TX].ubufs) {  in vhost_net_flush()
778 		vhost_net_ubuf_put_and_wait(n->vqs[VHOST_NET_VQ_TX].ubufs);  in vhost_net_flush()
781 		atomic_set(&n->vqs[VHOST_NET_VQ_TX].ubufs->refcount, 1);  in vhost_net_flush()
881 	struct vhost_net_ubuf_ref *ubufs, *oldubufs = NULL;  in vhost_net_set_backend()  local
911 		ubufs = vhost_net_ubuf_alloc(vq,  in vhost_net_set_backend()
913 		if (IS_ERR(ubufs)) {  in vhost_net_set_backend()
914 			r = PTR_ERR(ubufs);  in vhost_net_set_backend()
927 		oldubufs = nvq->ubufs;  in vhost_net_set_backend()
928 		nvq->ubufs = ubufs;  in vhost_net_set_backend()
955 	if (ubufs)  in vhost_net_set_backend()
956 		vhost_net_ubuf_put_wait_and_free(ubufs);  in vhost_net_set_backend()