98 	struct vhost_net_ubuf_ref *ubufs;  member
125 	struct vhost_net_ubuf_ref *ubufs;  in vhost_net_ubuf_alloc()  local
129 	ubufs = kmalloc(sizeof(*ubufs), GFP_KERNEL);  in vhost_net_ubuf_alloc()
130 	if (!ubufs)  in vhost_net_ubuf_alloc()
132 	atomic_set(&ubufs->refcount, 1);  in vhost_net_ubuf_alloc()
133 	init_waitqueue_head(&ubufs->wait);  in vhost_net_ubuf_alloc()
134 	ubufs->vq = vq;  in vhost_net_ubuf_alloc()
135 	return ubufs;  in vhost_net_ubuf_alloc()
138 static int vhost_net_ubuf_put(struct vhost_net_ubuf_ref *ubufs)  in vhost_net_ubuf_put()  argument
140 	int r = atomic_sub_return(1, &ubufs->refcount);  in vhost_net_ubuf_put()
142 		wake_up(&ubufs->wait);  in vhost_net_ubuf_put()
146 static void vhost_net_ubuf_put_and_wait(struct vhost_net_ubuf_ref *ubufs)  in vhost_net_ubuf_put_and_wait()  argument
148 	vhost_net_ubuf_put(ubufs);  in vhost_net_ubuf_put_and_wait()
149 	wait_event(ubufs->wait, !atomic_read(&ubufs->refcount));  in vhost_net_ubuf_put_and_wait()
152 static void vhost_net_ubuf_put_wait_and_free(struct vhost_net_ubuf_ref *ubufs)  in vhost_net_ubuf_put_wait_and_free()  argument
154 	vhost_net_ubuf_put_and_wait(ubufs);  in vhost_net_ubuf_put_wait_and_free()
155 	kfree(ubufs);  in vhost_net_ubuf_put_wait_and_free()
198 		n->vqs[i].ubufs = NULL;  in vhost_net_vq_reset()
267 	struct vhost_net_ubuf_ref *ubufs = ubuf->ctx;  in vhost_zerocopy_callback()  local
268 	struct vhost_virtqueue *vq = ubufs->vq;  in vhost_zerocopy_callback()
276 	cnt = vhost_net_ubuf_put(ubufs);  in vhost_zerocopy_callback()
310 	struct vhost_net_ubuf_ref *uninitialized_var(ubufs);  in handle_tx()
321 	zcopy = nvq->ubufs;  in handle_tx()
381 			ubuf->ctx = nvq->ubufs;  in handle_tx()
385 			ubufs = nvq->ubufs;  in handle_tx()
386 			atomic_inc(&ubufs->refcount);  in handle_tx()
390 			ubufs = NULL;  in handle_tx()
396 				vhost_net_ubuf_put(ubufs);  in handle_tx()
701 		n->vqs[i].ubufs = NULL;  in vhost_net_open()
774 	if (n->vqs[VHOST_NET_VQ_TX].ubufs) {  in vhost_net_flush()
779 		vhost_net_ubuf_put_and_wait(n->vqs[VHOST_NET_VQ_TX].ubufs);  in vhost_net_flush()
782 		atomic_set(&n->vqs[VHOST_NET_VQ_TX].ubufs->refcount, 1);  in vhost_net_flush()
882 	struct vhost_net_ubuf_ref *ubufs, *oldubufs = NULL;  in vhost_net_set_backend()  local
912 		ubufs = vhost_net_ubuf_alloc(vq,  in vhost_net_set_backend()
914 		if (IS_ERR(ubufs)) {  in vhost_net_set_backend()
915 			r = PTR_ERR(ubufs);  in vhost_net_set_backend()
928 		oldubufs = nvq->ubufs;  in vhost_net_set_backend()
929 		nvq->ubufs = ubufs;  in vhost_net_set_backend()
956 	if (ubufs)  in vhost_net_set_backend()
957 		vhost_net_ubuf_put_wait_and_free(ubufs);  in vhost_net_set_backend()