1 // SPDX-License-Identifier: GPL-2.0-or-later
21  *				 	sent back to Linux for re-transmission
108 		dev->stats.rx_errors++;  in dlci_receive()
113 	hdr = (struct frhdr *) skb->data;  in dlci_receive()
116 	skb->dev = dev;  in dlci_receive()
118 	if (hdr->control != FRAD_I_UI)  in dlci_receive()
121 			      hdr->control);  in dlci_receive()
122 		dev->stats.rx_errors++;  in dlci_receive()
125 		switch (hdr->IP_NLPID)  in dlci_receive()
128 				if (hdr->NLPID != FRAD_P_SNAP)  in dlci_receive()
131 						      hdr->NLPID);  in dlci_receive()
132 					dev->stats.rx_errors++;  in dlci_receive()
136 				if (hdr->OUI[0] + hdr->OUI[1] + hdr->OUI[2] != 0)  in dlci_receive()
138 					netdev_notice(dev, "Unsupported organizationally unique identifier 0x%02X-%02X-%02X\n",  in dlci_receive()
139 						      hdr->OUI[0],  in dlci_receive()
140 						      hdr->OUI[1],  in dlci_receive()
141 						      hdr->OUI[2]);  in dlci_receive()
142 					dev->stats.rx_errors++;  in dlci_receive()
149 				skb->protocol = hdr->PID;  in dlci_receive()
154 				header = sizeof(hdr->control) + sizeof(hdr->IP_NLPID);  in dlci_receive()
155 				skb->protocol = htons(ETH_P_IP);  in dlci_receive()
163 					      hdr->pad);  in dlci_receive()
164 				dev->stats.rx_errors++;  in dlci_receive()
169 					      hdr->pad);  in dlci_receive()
170 				dev->stats.rx_errors++;  in dlci_receive()
179 		dev->stats.rx_bytes += skb->len;  in dlci_receive()
181 		dev->stats.rx_packets++;  in dlci_receive()
193 		netdev_start_xmit(skb, dlp->slave, txq, false);  in dlci_transmit()
207 	flp = netdev_priv(dlp->slave);  in dlci_config()
212 			return -EFAULT;  in dlci_config()
214 			return -EINVAL;  in dlci_config()
215 		memcpy(&dlp->config, &config, sizeof(struct dlci_conf));  in dlci_config()
216 		dlp->configured = 1;  in dlci_config()
219 	err = (*flp->dlci_conf)(dlp->slave, dev, get);  in dlci_config()
225 		if (copy_to_user(conf, &dlp->config, sizeof(struct dlci_conf)))  in dlci_config()
226 			return -EFAULT;  in dlci_config()
237 		return -EPERM;  in dlci_dev_ioctl()
244 			if (!*(short *)(dev->dev_addr))  in dlci_dev_ioctl()
245 				return -EINVAL;  in dlci_dev_ioctl()
247 			strncpy(ifr->ifr_slave, dlp->slave->name, sizeof(ifr->ifr_slave));  in dlci_dev_ioctl()
252 			if (!*(short *)(dev->dev_addr))  in dlci_dev_ioctl()
253 				return -EINVAL;  in dlci_dev_ioctl()
255 			return dlci_config(dev, ifr->ifr_data, cmd == DLCI_GET_CONF);  in dlci_dev_ioctl()
258 			return -EOPNOTSUPP;  in dlci_dev_ioctl()
267 	return dev_set_mtu(dlp->slave, new_mtu);  in dlci_change_mtu()
278 	if (!*(short *)(dev->dev_addr))  in dlci_open()
279 		return -EINVAL;  in dlci_open()
281 	if (!netif_running(dlp->slave))  in dlci_open()
282 		return -ENOTCONN;  in dlci_open()
284 	flp = netdev_priv(dlp->slave);  in dlci_open()
285 	err = (*flp->activate)(dlp->slave, dev);  in dlci_open()
303 	flp = netdev_priv(dlp->slave);  in dlci_close()
304 	(*flp->deactivate)(dlp->slave, dev);  in dlci_close()
311 	struct net_device	*master, *slave;  in dlci_add()  local
314 	int			err = -EINVAL;  in dlci_add()
318 	slave = dev_get_by_name(&init_net, dlci->devname);  in dlci_add()
320 		return -ENODEV;  in dlci_add()
322 	if (slave->type != ARPHRD_FRAD || netdev_priv(slave) == NULL)  in dlci_add()
326 	master = alloc_netdev(sizeof(struct dlci_local), "dlci%d",  in dlci_add()
328 	if (!master) {  in dlci_add()
329 		err = -ENOMEM;  in dlci_add()
336 		if (dlp->slave == slave) {  in dlci_add()
337 			err = -EBUSY;  in dlci_add()
342 	*(short *)(master->dev_addr) = dlci->dlci;  in dlci_add()
344 	dlp = netdev_priv(master);  in dlci_add()
345 	dlp->slave = slave;  in dlci_add()
346 	dlp->master = master;  in dlci_add()
349 	err = (*flp->assoc)(slave, master);  in dlci_add()
353 	err = register_netdevice(master);  in dlci_add()
357 	strcpy(dlci->devname, master->name);  in dlci_add()
359 	list_add(&dlp->list, &dlci_devs);  in dlci_add()
366 	free_netdev(master);  in dlci_add()
376 	struct net_device	*master, *slave;  in dlci_del()  local
383 	master = __dev_get_by_name(&init_net, dlci->devname);  in dlci_del()
384 	if (!master) {  in dlci_del()
385 		err = -ENODEV;  in dlci_del()
390 		if (dlp->master == master) {  in dlci_del()
396 		err = -ENODEV;  in dlci_del()
400 	if (netif_running(master)) {  in dlci_del()
401 		err = -EBUSY;  in dlci_del()
405 	dlp = netdev_priv(master);  in dlci_del()
406 	slave = dlp->slave;  in dlci_del()
409 	err = (*flp->deassoc)(slave, master);  in dlci_del()
411 		list_del(&dlp->list);  in dlci_del()
413 		unregister_netdevice(master);  in dlci_del()
428 		return -EPERM;  in dlci_ioctl()
431 		return -EFAULT;  in dlci_ioctl()
440 					return -EFAULT;  in dlci_ioctl()
448 			err = -EINVAL;  in dlci_ioctl()
470 	dev->flags		= 0;  in dlci_setup()
471 	dev->header_ops		= &dlci_header_ops;  in dlci_setup()
472 	dev->netdev_ops		= &dlci_netdev_ops;  in dlci_setup()
473 	dev->needs_free_netdev	= true;  in dlci_setup()
475 	dlp->receive		= dlci_receive;  in dlci_setup()
477 	dev->type		= ARPHRD_DLCI;  in dlci_setup()
478 	dev->hard_header_len	= sizeof(struct frhdr);  in dlci_setup()
479 	dev->addr_len		= sizeof(short);  in dlci_setup()
483 /* if slave is unregistering, then cleanup master */
496 			if (dlp->slave == dev) {  in dlci_dev_event()
497 				list_del(&dlp->list);  in dlci_dev_event()
498 				unregister_netdevice(dlp->master);  in dlci_dev_event()
499 				dev_put(dlp->slave);  in dlci_dev_event()
530 		unregister_netdevice(dlp->master);  in dlci_exit()
531 		dev_put(dlp->slave);  in dlci_exit()