72 	struct vhost_vsock *vsock;  in vhost_vsock_get()  local
74 	hash_for_each_possible_rcu(vhost_vsock_hash, vsock, hash, guest_cid) {  in vhost_vsock_get()
75 		u32 other_cid = vsock->guest_cid;  in vhost_vsock_get()
82 			return vsock;  in vhost_vsock_get()
90 vhost_transport_do_send_pkt(struct vhost_vsock *vsock,  in vhost_transport_do_send_pkt()  argument
93 	struct vhost_virtqueue *tx_vq = &vsock->vqs[VSOCK_VQ_TX];  in vhost_transport_do_send_pkt()
107 	vhost_disable_notify(&vsock->dev, vq);  in vhost_transport_do_send_pkt()
119 		skb = virtio_vsock_skb_dequeue(&vsock->send_pkt_queue);  in vhost_transport_do_send_pkt()
122 			vhost_enable_notify(&vsock->dev, vq);  in vhost_transport_do_send_pkt()
129 			virtio_vsock_skb_queue_head(&vsock->send_pkt_queue, skb);  in vhost_transport_do_send_pkt()
134 			virtio_vsock_skb_queue_head(&vsock->send_pkt_queue, skb);  in vhost_transport_do_send_pkt()
138 			if (unlikely(vhost_enable_notify(&vsock->dev, vq))) {  in vhost_transport_do_send_pkt()
139 				vhost_disable_notify(&vsock->dev, vq);  in vhost_transport_do_send_pkt()
229 			virtio_vsock_skb_queue_head(&vsock->send_pkt_queue, skb);  in vhost_transport_do_send_pkt()
234 				val = atomic_dec_return(&vsock->queued_replies);  in vhost_transport_do_send_pkt()
247 		vhost_signal(&vsock->dev, vq);  in vhost_transport_do_send_pkt()
259 	struct vhost_vsock *vsock;  in vhost_transport_send_pkt_work()  local
261 	vsock = container_of(work, struct vhost_vsock, send_pkt_work);  in vhost_transport_send_pkt_work()
262 	vq = &vsock->vqs[VSOCK_VQ_RX];  in vhost_transport_send_pkt_work()
264 	vhost_transport_do_send_pkt(vsock, vq);  in vhost_transport_send_pkt_work()
271 	struct vhost_vsock *vsock;  in vhost_transport_send_pkt()  local
277 	vsock = vhost_vsock_get(le64_to_cpu(hdr->dst_cid));  in vhost_transport_send_pkt()
278 	if (!vsock) {  in vhost_transport_send_pkt()
285 		atomic_inc(&vsock->queued_replies);  in vhost_transport_send_pkt()
287 	virtio_vsock_skb_queue_tail(&vsock->send_pkt_queue, skb);  in vhost_transport_send_pkt()
288 	vhost_vq_work_queue(&vsock->vqs[VSOCK_VQ_RX], &vsock->send_pkt_work);  in vhost_transport_send_pkt()
297 	struct vhost_vsock *vsock;  in vhost_transport_cancel_pkt()  local
304 	vsock = vhost_vsock_get(vsk->remote_addr.svm_cid);  in vhost_transport_cancel_pkt()
305 	if (!vsock)  in vhost_transport_cancel_pkt()
308 	cnt = virtio_transport_purge_skbs(vsk, &vsock->send_pkt_queue);  in vhost_transport_cancel_pkt()
311 		struct vhost_virtqueue *tx_vq = &vsock->vqs[VSOCK_VQ_TX];  in vhost_transport_cancel_pkt()
314 		new_cnt = atomic_sub_return(cnt, &vsock->queued_replies);  in vhost_transport_cancel_pkt()
386 static bool vhost_vsock_more_replies(struct vhost_vsock *vsock)  in vhost_vsock_more_replies()  argument
388 	struct vhost_virtqueue *vq = &vsock->vqs[VSOCK_VQ_TX];  in vhost_vsock_more_replies()
392 	val = atomic_read(&vsock->queued_replies);  in vhost_vsock_more_replies()
450 	struct vhost_vsock *vsock;  in vhost_transport_seqpacket_allow()  local
454 	vsock = vhost_vsock_get(remote_cid);  in vhost_transport_seqpacket_allow()
456 	if (vsock)  in vhost_transport_seqpacket_allow()
457 		seqpacket_allow = vsock->seqpacket_allow;  in vhost_transport_seqpacket_allow()
468 	struct vhost_vsock *vsock = container_of(vq->dev, struct vhost_vsock,  in vhost_vsock_handle_tx_kick()  local
483 	vhost_disable_notify(&vsock->dev, vq);  in vhost_vsock_handle_tx_kick()
487 		if (!vhost_vsock_more_replies(vsock)) {  in vhost_vsock_handle_tx_kick()
501 			if (unlikely(vhost_enable_notify(&vsock->dev, vq))) {  in vhost_vsock_handle_tx_kick()
502 				vhost_disable_notify(&vsock->dev, vq);  in vhost_vsock_handle_tx_kick()
522 		if (le64_to_cpu(hdr->src_cid) == vsock->guest_cid &&  in vhost_vsock_handle_tx_kick()
535 		vhost_signal(&vsock->dev, vq);  in vhost_vsock_handle_tx_kick()
545 	struct vhost_vsock *vsock = container_of(vq->dev, struct vhost_vsock,  in vhost_vsock_handle_rx_kick()  local
548 	vhost_transport_do_send_pkt(vsock, vq);  in vhost_vsock_handle_rx_kick()
551 static int vhost_vsock_start(struct vhost_vsock *vsock)  in vhost_vsock_start()  argument
557 	mutex_lock(&vsock->dev.mutex);  in vhost_vsock_start()
559 	ret = vhost_dev_check_owner(&vsock->dev);  in vhost_vsock_start()
563 	for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {  in vhost_vsock_start()
564 		vq = &vsock->vqs[i];  in vhost_vsock_start()
574 			vhost_vq_set_backend(vq, vsock);  in vhost_vsock_start()
586 	vhost_vq_work_queue(&vsock->vqs[VSOCK_VQ_RX], &vsock->send_pkt_work);  in vhost_vsock_start()
588 	mutex_unlock(&vsock->dev.mutex);  in vhost_vsock_start()
595 	for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {  in vhost_vsock_start()
596 		vq = &vsock->vqs[i];  in vhost_vsock_start()
603 	mutex_unlock(&vsock->dev.mutex);  in vhost_vsock_start()
607 static int vhost_vsock_stop(struct vhost_vsock *vsock, bool check_owner)  in vhost_vsock_stop()  argument
612 	mutex_lock(&vsock->dev.mutex);  in vhost_vsock_stop()
615 		ret = vhost_dev_check_owner(&vsock->dev);  in vhost_vsock_stop()
620 	for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {  in vhost_vsock_stop()
621 		struct vhost_virtqueue *vq = &vsock->vqs[i];  in vhost_vsock_stop()
629 	mutex_unlock(&vsock->dev.mutex);  in vhost_vsock_stop()
633 static void vhost_vsock_free(struct vhost_vsock *vsock)  in vhost_vsock_free()  argument
635 	kvfree(vsock);  in vhost_vsock_free()
641 	struct vhost_vsock *vsock;  in vhost_vsock_dev_open()  local
647 	vsock = kvmalloc(sizeof(*vsock), GFP_KERNEL | __GFP_RETRY_MAYFAIL);  in vhost_vsock_dev_open()
648 	if (!vsock)  in vhost_vsock_dev_open()
651 	vqs = kmalloc_array(ARRAY_SIZE(vsock->vqs), sizeof(*vqs), GFP_KERNEL);  in vhost_vsock_dev_open()
657 	vsock->guest_cid = 0; /* no CID assigned yet */  in vhost_vsock_dev_open()
659 	atomic_set(&vsock->queued_replies, 0);  in vhost_vsock_dev_open()
661 	vqs[VSOCK_VQ_TX] = &vsock->vqs[VSOCK_VQ_TX];  in vhost_vsock_dev_open()
662 	vqs[VSOCK_VQ_RX] = &vsock->vqs[VSOCK_VQ_RX];  in vhost_vsock_dev_open()
663 	vsock->vqs[VSOCK_VQ_TX].handle_kick = vhost_vsock_handle_tx_kick;  in vhost_vsock_dev_open()
664 	vsock->vqs[VSOCK_VQ_RX].handle_kick = vhost_vsock_handle_rx_kick;  in vhost_vsock_dev_open()
666 	vhost_dev_init(&vsock->dev, vqs, ARRAY_SIZE(vsock->vqs),  in vhost_vsock_dev_open()
670 	file->private_data = vsock;  in vhost_vsock_dev_open()
671 	skb_queue_head_init(&vsock->send_pkt_queue);  in vhost_vsock_dev_open()
672 	vhost_work_init(&vsock->send_pkt_work, vhost_transport_send_pkt_work);  in vhost_vsock_dev_open()
676 	vhost_vsock_free(vsock);  in vhost_vsock_dev_open()
680 static void vhost_vsock_flush(struct vhost_vsock *vsock)  in vhost_vsock_flush()  argument
682 	vhost_dev_flush(&vsock->dev);  in vhost_vsock_flush()
713 	struct vhost_vsock *vsock = file->private_data;  in vhost_vsock_dev_release()  local
716 	if (vsock->guest_cid)  in vhost_vsock_dev_release()
717 		hash_del_rcu(&vsock->hash);  in vhost_vsock_dev_release()
733 	vhost_vsock_stop(vsock, false);  in vhost_vsock_dev_release()
734 	vhost_vsock_flush(vsock);  in vhost_vsock_dev_release()
735 	vhost_dev_stop(&vsock->dev);  in vhost_vsock_dev_release()
737 	virtio_vsock_skb_queue_purge(&vsock->send_pkt_queue);  in vhost_vsock_dev_release()
739 	vhost_dev_cleanup(&vsock->dev);  in vhost_vsock_dev_release()
740 	kfree(vsock->dev.vqs);  in vhost_vsock_dev_release()
741 	vhost_vsock_free(vsock);  in vhost_vsock_dev_release()
745 static int vhost_vsock_set_cid(struct vhost_vsock *vsock, u64 guest_cid)  in vhost_vsock_set_cid()  argument
767 	if (other && other != vsock) {  in vhost_vsock_set_cid()
772 	if (vsock->guest_cid)  in vhost_vsock_set_cid()
773 		hash_del_rcu(&vsock->hash);  in vhost_vsock_set_cid()
775 	vsock->guest_cid = guest_cid;  in vhost_vsock_set_cid()
776 	hash_add_rcu(vhost_vsock_hash, &vsock->hash, vsock->guest_cid);  in vhost_vsock_set_cid()
782 static int vhost_vsock_set_features(struct vhost_vsock *vsock, u64 features)  in vhost_vsock_set_features()  argument
790 	mutex_lock(&vsock->dev.mutex);  in vhost_vsock_set_features()
792 	    !vhost_log_access_ok(&vsock->dev)) {  in vhost_vsock_set_features()
797 		if (vhost_init_device_iotlb(&vsock->dev))  in vhost_vsock_set_features()
802 		vsock->seqpacket_allow = true;  in vhost_vsock_set_features()
804 	for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {  in vhost_vsock_set_features()
805 		vq = &vsock->vqs[i];  in vhost_vsock_set_features()
810 	mutex_unlock(&vsock->dev.mutex);  in vhost_vsock_set_features()
814 	mutex_unlock(&vsock->dev.mutex);  in vhost_vsock_set_features()
821 	struct vhost_vsock *vsock = f->private_data;  in vhost_vsock_dev_ioctl()  local
832 		return vhost_vsock_set_cid(vsock, guest_cid);  in vhost_vsock_dev_ioctl()
837 			return vhost_vsock_start(vsock);  in vhost_vsock_dev_ioctl()
839 			return vhost_vsock_stop(vsock, true);  in vhost_vsock_dev_ioctl()
848 		return vhost_vsock_set_features(vsock, features);  in vhost_vsock_dev_ioctl()
859 		vhost_set_backend_features(&vsock->dev, features);  in vhost_vsock_dev_ioctl()
862 		mutex_lock(&vsock->dev.mutex);  in vhost_vsock_dev_ioctl()
863 		r = vhost_dev_ioctl(&vsock->dev, ioctl, argp);  in vhost_vsock_dev_ioctl()
865 			r = vhost_vring_ioctl(&vsock->dev, ioctl, argp);  in vhost_vsock_dev_ioctl()
867 			vhost_vsock_flush(vsock);  in vhost_vsock_dev_ioctl()
868 		mutex_unlock(&vsock->dev.mutex);  in vhost_vsock_dev_ioctl()
876 	struct vhost_vsock *vsock = file->private_data;  in vhost_vsock_chr_read_iter()  local
877 	struct vhost_dev *dev = &vsock->dev;  in vhost_vsock_chr_read_iter()
887 	struct vhost_vsock *vsock = file->private_data;  in vhost_vsock_chr_write_iter()  local
888 	struct vhost_dev *dev = &vsock->dev;  in vhost_vsock_chr_write_iter()
895 	struct vhost_vsock *vsock = file->private_data;  in vhost_vsock_chr_poll()  local
896 	struct vhost_dev *dev = &vsock->dev;  in vhost_vsock_chr_poll()