1 // SPDX-License-Identifier: GPL-2.0
15 	struct sk_buff_head queue;  member
23 	skb_queue_tail(&tun->queue, skb);  in qrtr_tun_send()
26 	wake_up_interruptible(&tun->readq);  in qrtr_tun_send()
38 		return -ENOMEM;  in qrtr_tun_open()
40 	skb_queue_head_init(&tun->queue);  in qrtr_tun_open()
41 	init_waitqueue_head(&tun->readq);  in qrtr_tun_open()
43 	tun->ep.xmit = qrtr_tun_send;  in qrtr_tun_open()
45 	filp->private_data = tun;  in qrtr_tun_open()
47 	ret = qrtr_endpoint_register(&tun->ep, QRTR_EP_NID_AUTO);  in qrtr_tun_open()
54 	filp->private_data = NULL;  in qrtr_tun_open()
61 	struct file *filp = iocb->ki_filp;  in qrtr_tun_read_iter()
62 	struct qrtr_tun *tun = filp->private_data;  in qrtr_tun_read_iter()
66 	while (!(skb = skb_dequeue(&tun->queue))) {  in qrtr_tun_read_iter()
67 		if (filp->f_flags & O_NONBLOCK)  in qrtr_tun_read_iter()
68 			return -EAGAIN;  in qrtr_tun_read_iter()
70 		/* Wait until we get data or the endpoint goes away */  in qrtr_tun_read_iter()
71 		if (wait_event_interruptible(tun->readq,  in qrtr_tun_read_iter()
72 					     !skb_queue_empty(&tun->queue)))  in qrtr_tun_read_iter()
73 			return -ERESTARTSYS;  in qrtr_tun_read_iter()
76 	count = min_t(size_t, iov_iter_count(to), skb->len);  in qrtr_tun_read_iter()
77 	if (copy_to_iter(skb->data, count, to) != count)  in qrtr_tun_read_iter()
78 		count = -EFAULT;  in qrtr_tun_read_iter()
87 	struct file *filp = iocb->ki_filp;  in qrtr_tun_write_iter()
88 	struct qrtr_tun *tun = filp->private_data;  in qrtr_tun_write_iter()
94 		return -EINVAL;  in qrtr_tun_write_iter()
97 		return -ENOMEM;  in qrtr_tun_write_iter()
101 		return -ENOMEM;  in qrtr_tun_write_iter()
105 		return -EFAULT;  in qrtr_tun_write_iter()
108 	ret = qrtr_endpoint_post(&tun->ep, kbuf, len);  in qrtr_tun_write_iter()
114 static __poll_t qrtr_tun_poll(struct file *filp, poll_table *wait)  in qrtr_tun_poll()  argument
116 	struct qrtr_tun *tun = filp->private_data;  in qrtr_tun_poll()
119 	poll_wait(filp, &tun->readq, wait);  in qrtr_tun_poll()
121 	if (!skb_queue_empty(&tun->queue))  in qrtr_tun_poll()
129 	struct qrtr_tun *tun = filp->private_data;  in qrtr_tun_release()
131 	qrtr_endpoint_unregister(&tun->ep);  in qrtr_tun_release()
134 	skb_queue_purge(&tun->queue);  in qrtr_tun_release()
152 	"qrtr-tun",