66 	struct vhost_vsock *vsock;  in vhost_vsock_get()  local
68 	hash_for_each_possible_rcu(vhost_vsock_hash, vsock, hash, guest_cid) {  in vhost_vsock_get()
69 		u32 other_cid = vsock->guest_cid;  in vhost_vsock_get()
76 			return vsock;  in vhost_vsock_get()
84 vhost_transport_do_send_pkt(struct vhost_vsock *vsock,  in vhost_transport_do_send_pkt()  argument
87 	struct vhost_virtqueue *tx_vq = &vsock->vqs[VSOCK_VQ_TX];  in vhost_transport_do_send_pkt()
98 	vhost_disable_notify(&vsock->dev, vq);  in vhost_transport_do_send_pkt()
108 		spin_lock_bh(&vsock->send_pkt_list_lock);  in vhost_transport_do_send_pkt()
109 		if (list_empty(&vsock->send_pkt_list)) {  in vhost_transport_do_send_pkt()
110 			spin_unlock_bh(&vsock->send_pkt_list_lock);  in vhost_transport_do_send_pkt()
111 			vhost_enable_notify(&vsock->dev, vq);  in vhost_transport_do_send_pkt()
115 		pkt = list_first_entry(&vsock->send_pkt_list,  in vhost_transport_do_send_pkt()
118 		spin_unlock_bh(&vsock->send_pkt_list_lock);  in vhost_transport_do_send_pkt()
123 			spin_lock_bh(&vsock->send_pkt_list_lock);  in vhost_transport_do_send_pkt()
124 			list_add(&pkt->list, &vsock->send_pkt_list);  in vhost_transport_do_send_pkt()
125 			spin_unlock_bh(&vsock->send_pkt_list_lock);  in vhost_transport_do_send_pkt()
130 			spin_lock_bh(&vsock->send_pkt_list_lock);  in vhost_transport_do_send_pkt()
131 			list_add(&pkt->list, &vsock->send_pkt_list);  in vhost_transport_do_send_pkt()
132 			spin_unlock_bh(&vsock->send_pkt_list_lock);  in vhost_transport_do_send_pkt()
137 			if (unlikely(vhost_enable_notify(&vsock->dev, vq))) {  in vhost_transport_do_send_pkt()
138 				vhost_disable_notify(&vsock->dev, vq);  in vhost_transport_do_send_pkt()
205 			spin_lock_bh(&vsock->send_pkt_list_lock);  in vhost_transport_do_send_pkt()
206 			list_add(&pkt->list, &vsock->send_pkt_list);  in vhost_transport_do_send_pkt()
207 			spin_unlock_bh(&vsock->send_pkt_list_lock);  in vhost_transport_do_send_pkt()
212 				val = atomic_dec_return(&vsock->queued_replies);  in vhost_transport_do_send_pkt()
225 		vhost_signal(&vsock->dev, vq);  in vhost_transport_do_send_pkt()
237 	struct vhost_vsock *vsock;  in vhost_transport_send_pkt_work()  local
239 	vsock = container_of(work, struct vhost_vsock, send_pkt_work);  in vhost_transport_send_pkt_work()
240 	vq = &vsock->vqs[VSOCK_VQ_RX];  in vhost_transport_send_pkt_work()
242 	vhost_transport_do_send_pkt(vsock, vq);  in vhost_transport_send_pkt_work()
248 	struct vhost_vsock *vsock;  in vhost_transport_send_pkt()  local
254 	vsock = vhost_vsock_get(le64_to_cpu(pkt->hdr.dst_cid));  in vhost_transport_send_pkt()
255 	if (!vsock) {  in vhost_transport_send_pkt()
262 		atomic_inc(&vsock->queued_replies);  in vhost_transport_send_pkt()
264 	spin_lock_bh(&vsock->send_pkt_list_lock);  in vhost_transport_send_pkt()
265 	list_add_tail(&pkt->list, &vsock->send_pkt_list);  in vhost_transport_send_pkt()
266 	spin_unlock_bh(&vsock->send_pkt_list_lock);  in vhost_transport_send_pkt()
268 	vhost_work_queue(&vsock->dev, &vsock->send_pkt_work);  in vhost_transport_send_pkt()
277 	struct vhost_vsock *vsock;  in vhost_transport_cancel_pkt()  local
286 	vsock = vhost_vsock_get(vsk->remote_addr.svm_cid);  in vhost_transport_cancel_pkt()
287 	if (!vsock)  in vhost_transport_cancel_pkt()
290 	spin_lock_bh(&vsock->send_pkt_list_lock);  in vhost_transport_cancel_pkt()
291 	list_for_each_entry_safe(pkt, n, &vsock->send_pkt_list, list) {  in vhost_transport_cancel_pkt()
296 	spin_unlock_bh(&vsock->send_pkt_list_lock);  in vhost_transport_cancel_pkt()
306 		struct vhost_virtqueue *tx_vq = &vsock->vqs[VSOCK_VQ_TX];  in vhost_transport_cancel_pkt()
309 		new_cnt = atomic_sub_return(cnt, &vsock->queued_replies);  in vhost_transport_cancel_pkt()
382 static bool vhost_vsock_more_replies(struct vhost_vsock *vsock)  in vhost_vsock_more_replies()  argument
384 	struct vhost_virtqueue *vq = &vsock->vqs[VSOCK_VQ_TX];  in vhost_vsock_more_replies()
388 	val = atomic_read(&vsock->queued_replies);  in vhost_vsock_more_replies()
440 	struct vhost_vsock *vsock = container_of(vq->dev, struct vhost_vsock,  in vhost_vsock_handle_tx_kick()  local
452 	vhost_disable_notify(&vsock->dev, vq);  in vhost_vsock_handle_tx_kick()
456 		if (!vhost_vsock_more_replies(vsock)) {  in vhost_vsock_handle_tx_kick()
470 			if (unlikely(vhost_enable_notify(&vsock->dev, vq))) {  in vhost_vsock_handle_tx_kick()
471 				vhost_disable_notify(&vsock->dev, vq);  in vhost_vsock_handle_tx_kick()
489 		if (le64_to_cpu(pkt->hdr.src_cid) == vsock->guest_cid &&  in vhost_vsock_handle_tx_kick()
504 		vhost_signal(&vsock->dev, vq);  in vhost_vsock_handle_tx_kick()
514 	struct vhost_vsock *vsock = container_of(vq->dev, struct vhost_vsock,  in vhost_vsock_handle_rx_kick()  local
517 	vhost_transport_do_send_pkt(vsock, vq);  in vhost_vsock_handle_rx_kick()
520 static int vhost_vsock_start(struct vhost_vsock *vsock)  in vhost_vsock_start()  argument
526 	mutex_lock(&vsock->dev.mutex);  in vhost_vsock_start()
528 	ret = vhost_dev_check_owner(&vsock->dev);  in vhost_vsock_start()
532 	for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {  in vhost_vsock_start()
533 		vq = &vsock->vqs[i];  in vhost_vsock_start()
543 			vhost_vq_set_backend(vq, vsock);  in vhost_vsock_start()
555 	vhost_work_queue(&vsock->dev, &vsock->send_pkt_work);  in vhost_vsock_start()
557 	mutex_unlock(&vsock->dev.mutex);  in vhost_vsock_start()
564 	for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {  in vhost_vsock_start()
565 		vq = &vsock->vqs[i];  in vhost_vsock_start()
572 	mutex_unlock(&vsock->dev.mutex);  in vhost_vsock_start()
576 static int vhost_vsock_stop(struct vhost_vsock *vsock)  in vhost_vsock_stop()  argument
581 	mutex_lock(&vsock->dev.mutex);  in vhost_vsock_stop()
583 	ret = vhost_dev_check_owner(&vsock->dev);  in vhost_vsock_stop()
587 	for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {  in vhost_vsock_stop()
588 		struct vhost_virtqueue *vq = &vsock->vqs[i];  in vhost_vsock_stop()
596 	mutex_unlock(&vsock->dev.mutex);  in vhost_vsock_stop()
600 static void vhost_vsock_free(struct vhost_vsock *vsock)  in vhost_vsock_free()  argument
602 	kvfree(vsock);  in vhost_vsock_free()
608 	struct vhost_vsock *vsock;  in vhost_vsock_dev_open()  local
614 	vsock = kvmalloc(sizeof(*vsock), GFP_KERNEL | __GFP_RETRY_MAYFAIL);  in vhost_vsock_dev_open()
615 	if (!vsock)  in vhost_vsock_dev_open()
618 	vqs = kmalloc_array(ARRAY_SIZE(vsock->vqs), sizeof(*vqs), GFP_KERNEL);  in vhost_vsock_dev_open()
624 	vsock->guest_cid = 0; /* no CID assigned yet */  in vhost_vsock_dev_open()
626 	atomic_set(&vsock->queued_replies, 0);  in vhost_vsock_dev_open()
628 	vqs[VSOCK_VQ_TX] = &vsock->vqs[VSOCK_VQ_TX];  in vhost_vsock_dev_open()
629 	vqs[VSOCK_VQ_RX] = &vsock->vqs[VSOCK_VQ_RX];  in vhost_vsock_dev_open()
630 	vsock->vqs[VSOCK_VQ_TX].handle_kick = vhost_vsock_handle_tx_kick;  in vhost_vsock_dev_open()
631 	vsock->vqs[VSOCK_VQ_RX].handle_kick = vhost_vsock_handle_rx_kick;  in vhost_vsock_dev_open()
633 	vhost_dev_init(&vsock->dev, vqs, ARRAY_SIZE(vsock->vqs),  in vhost_vsock_dev_open()
637 	file->private_data = vsock;  in vhost_vsock_dev_open()
638 	spin_lock_init(&vsock->send_pkt_list_lock);  in vhost_vsock_dev_open()
639 	INIT_LIST_HEAD(&vsock->send_pkt_list);  in vhost_vsock_dev_open()
640 	vhost_work_init(&vsock->send_pkt_work, vhost_transport_send_pkt_work);  in vhost_vsock_dev_open()
644 	vhost_vsock_free(vsock);  in vhost_vsock_dev_open()
648 static void vhost_vsock_flush(struct vhost_vsock *vsock)  in vhost_vsock_flush()  argument
652 	for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++)  in vhost_vsock_flush()
653 		if (vsock->vqs[i].handle_kick)  in vhost_vsock_flush()
654 			vhost_poll_flush(&vsock->vqs[i].poll);  in vhost_vsock_flush()
655 	vhost_work_flush(&vsock->dev, &vsock->send_pkt_work);  in vhost_vsock_flush()
686 	struct vhost_vsock *vsock = file->private_data;  in vhost_vsock_dev_release()  local
689 	if (vsock->guest_cid)  in vhost_vsock_dev_release()
690 		hash_del_rcu(&vsock->hash);  in vhost_vsock_dev_release()
700 	vhost_vsock_stop(vsock);  in vhost_vsock_dev_release()
701 	vhost_vsock_flush(vsock);  in vhost_vsock_dev_release()
702 	vhost_dev_stop(&vsock->dev);  in vhost_vsock_dev_release()
704 	spin_lock_bh(&vsock->send_pkt_list_lock);  in vhost_vsock_dev_release()
705 	while (!list_empty(&vsock->send_pkt_list)) {  in vhost_vsock_dev_release()
708 		pkt = list_first_entry(&vsock->send_pkt_list,  in vhost_vsock_dev_release()
713 	spin_unlock_bh(&vsock->send_pkt_list_lock);  in vhost_vsock_dev_release()
715 	vhost_dev_cleanup(&vsock->dev);  in vhost_vsock_dev_release()
716 	kfree(vsock->dev.vqs);  in vhost_vsock_dev_release()
717 	vhost_vsock_free(vsock);  in vhost_vsock_dev_release()
721 static int vhost_vsock_set_cid(struct vhost_vsock *vsock, u64 guest_cid)  in vhost_vsock_set_cid()  argument
743 	if (other && other != vsock) {  in vhost_vsock_set_cid()
748 	if (vsock->guest_cid)  in vhost_vsock_set_cid()
749 		hash_del_rcu(&vsock->hash);  in vhost_vsock_set_cid()
751 	vsock->guest_cid = guest_cid;  in vhost_vsock_set_cid()
752 	hash_add_rcu(vhost_vsock_hash, &vsock->hash, vsock->guest_cid);  in vhost_vsock_set_cid()
758 static int vhost_vsock_set_features(struct vhost_vsock *vsock, u64 features)  in vhost_vsock_set_features()  argument
766 	mutex_lock(&vsock->dev.mutex);  in vhost_vsock_set_features()
768 	    !vhost_log_access_ok(&vsock->dev)) {  in vhost_vsock_set_features()
769 		mutex_unlock(&vsock->dev.mutex);  in vhost_vsock_set_features()
773 	for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {  in vhost_vsock_set_features()
774 		vq = &vsock->vqs[i];  in vhost_vsock_set_features()
779 	mutex_unlock(&vsock->dev.mutex);  in vhost_vsock_set_features()
786 	struct vhost_vsock *vsock = f->private_data;  in vhost_vsock_dev_ioctl()  local
797 		return vhost_vsock_set_cid(vsock, guest_cid);  in vhost_vsock_dev_ioctl()
802 			return vhost_vsock_start(vsock);  in vhost_vsock_dev_ioctl()
804 			return vhost_vsock_stop(vsock);  in vhost_vsock_dev_ioctl()
813 		return vhost_vsock_set_features(vsock, features);  in vhost_vsock_dev_ioctl()
815 		mutex_lock(&vsock->dev.mutex);  in vhost_vsock_dev_ioctl()
816 		r = vhost_dev_ioctl(&vsock->dev, ioctl, argp);  in vhost_vsock_dev_ioctl()
818 			r = vhost_vring_ioctl(&vsock->dev, ioctl, argp);  in vhost_vsock_dev_ioctl()
820 			vhost_vsock_flush(vsock);  in vhost_vsock_dev_ioctl()
821 		mutex_unlock(&vsock->dev.mutex);  in vhost_vsock_dev_ioctl()