66 #define np_info(np, fmt, ...)				\  argument
67 	pr_info("%s: " fmt, np->name, ##__VA_ARGS__)
68 #define np_err(np, fmt, ...)				\  argument
69 	pr_err("%s: " fmt, np->name, ##__VA_ARGS__)
70 #define np_notice(np, fmt, ...)				\  argument
71 	pr_notice("%s: " fmt, np->name, ##__VA_ARGS__)
288 static struct sk_buff *find_skb(struct netpoll *np, int len, int reserve)  in find_skb()  argument
303 			netpoll_poll_dev(np->dev);  in find_skb()
326 static netdev_tx_t __netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)  in __netpoll_send_skb()  argument
336 	dev = np->dev;  in __netpoll_send_skb()
365 			netpoll_poll_dev(np->dev);  in __netpoll_send_skb()
383 netdev_tx_t netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)  in netpoll_send_skb()  argument
388 	if (unlikely(!np)) {  in netpoll_send_skb()
393 		ret = __netpoll_send_skb(np, skb);  in netpoll_send_skb()
400 void netpoll_send_udp(struct netpoll *np, const char *msg, int len)  in netpoll_send_udp()  argument
414 	if (np->ipv6)  in netpoll_send_udp()
419 	total_len = ip_len + LL_RESERVED_SPACE(np->dev);  in netpoll_send_udp()
421 	skb = find_skb(np, total_len + np->dev->needed_tailroom,  in netpoll_send_udp()
432 	udph->source = htons(np->local_port);  in netpoll_send_udp()
433 	udph->dest = htons(np->remote_port);  in netpoll_send_udp()
436 	if (np->ipv6) {  in netpoll_send_udp()
438 		udph->check = csum_ipv6_magic(&np->local_ip.in6,  in netpoll_send_udp()
439 					      &np->remote_ip.in6,  in netpoll_send_udp()
458 		ip6h->saddr = np->local_ip.in6;  in netpoll_send_udp()
459 		ip6h->daddr = np->remote_ip.in6;  in netpoll_send_udp()
466 		udph->check = csum_tcpudp_magic(np->local_ip.ip,  in netpoll_send_udp()
467 						np->remote_ip.ip,  in netpoll_send_udp()
486 		put_unaligned(np->local_ip.ip, &(iph->saddr));  in netpoll_send_udp()
487 		put_unaligned(np->remote_ip.ip, &(iph->daddr));  in netpoll_send_udp()
495 	ether_addr_copy(eth->h_source, np->dev->dev_addr);  in netpoll_send_udp()
496 	ether_addr_copy(eth->h_dest, np->remote_mac);  in netpoll_send_udp()
498 	skb->dev = np->dev;  in netpoll_send_udp()
500 	netpoll_send_skb(np, skb);  in netpoll_send_udp()
504 void netpoll_print_options(struct netpoll *np)  in netpoll_print_options()  argument
506 	np_info(np, "local port %d\n", np->local_port);  in netpoll_print_options()
507 	if (np->ipv6)  in netpoll_print_options()
508 		np_info(np, "local IPv6 address %pI6c\n", &np->local_ip.in6);  in netpoll_print_options()
510 		np_info(np, "local IPv4 address %pI4\n", &np->local_ip.ip);  in netpoll_print_options()
511 	np_info(np, "interface '%s'\n", np->dev_name);  in netpoll_print_options()
512 	np_info(np, "remote port %d\n", np->remote_port);  in netpoll_print_options()
513 	if (np->ipv6)  in netpoll_print_options()
514 		np_info(np, "remote IPv6 address %pI6c\n", &np->remote_ip.in6);  in netpoll_print_options()
516 		np_info(np, "remote IPv4 address %pI4\n", &np->remote_ip.ip);  in netpoll_print_options()
517 	np_info(np, "remote ethernet address %pM\n", np->remote_mac);  in netpoll_print_options()
541 int netpoll_parse_options(struct netpoll *np, char *opt)  in netpoll_parse_options()  argument
551 		if (kstrtou16(cur, 10, &np->local_port))  in netpoll_parse_options()
562 		ipv6 = netpoll_parse_ip_addr(cur, &np->local_ip);  in netpoll_parse_options()
566 			np->ipv6 = (bool)ipv6;  in netpoll_parse_options()
576 		strscpy(np->dev_name, cur, sizeof(np->dev_name));  in netpoll_parse_options()
587 			np_info(np, "warning: whitespace is not allowed\n");  in netpoll_parse_options()
588 		if (kstrtou16(cur, 10, &np->remote_port))  in netpoll_parse_options()
598 	ipv6 = netpoll_parse_ip_addr(cur, &np->remote_ip);  in netpoll_parse_options()
601 	else if (ipversion_set && np->ipv6 != (bool)ipv6)  in netpoll_parse_options()
604 		np->ipv6 = (bool)ipv6;  in netpoll_parse_options()
609 		if (!mac_pton(cur, np->remote_mac))  in netpoll_parse_options()
613 	netpoll_print_options(np);  in netpoll_parse_options()
618 	np_info(np, "couldn't parse config at '%s'!\n", cur);  in netpoll_parse_options()
623 int __netpoll_setup(struct netpoll *np, struct net_device *ndev)  in __netpoll_setup()  argument
629 	np->dev = ndev;  in __netpoll_setup()
630 	strscpy(np->dev_name, ndev->name, IFNAMSIZ);  in __netpoll_setup()
633 		np_err(np, "%s doesn't support polling, aborting\n",  in __netpoll_setup()
634 		       np->dev_name);  in __netpoll_setup()
652 		ops = np->dev->netdev_ops;  in __netpoll_setup()
663 	npinfo->netpoll = np;  in __netpoll_setup()
677 int netpoll_setup(struct netpoll *np)  in netpoll_setup()  argument
684 	if (np->dev_name[0]) {  in netpoll_setup()
686 		ndev = __dev_get_by_name(net, np->dev_name);  in netpoll_setup()
689 		np_err(np, "%s doesn't exist, aborting\n", np->dev_name);  in netpoll_setup()
693 	netdev_hold(ndev, &np->dev_tracker, GFP_KERNEL);  in netpoll_setup()
696 		np_err(np, "%s is a slave device, aborting\n", np->dev_name);  in netpoll_setup()
704 		np_info(np, "device %s not up yet, forcing it\n", np->dev_name);  in netpoll_setup()
709 			np_err(np, "failed to open %s\n", ndev->name);  in netpoll_setup()
717 				np_notice(np, "timeout waiting for carrier\n");  in netpoll_setup()
726 	if (!np->local_ip.ip) {  in netpoll_setup()
727 		if (!np->ipv6) {  in netpoll_setup()
737 				np_err(np, "no IP address for %s, aborting\n",  in netpoll_setup()
738 				       np->dev_name);  in netpoll_setup()
743 			np->local_ip.ip = ifa->ifa_local;  in netpoll_setup()
744 			np_info(np, "local IP %pI4\n", &np->local_ip.ip);  in netpoll_setup()
757 					    !!(ipv6_addr_type(&np->remote_ip.in6) & IPV6_ADDR_LINKLOCAL))  in netpoll_setup()
759 					np->local_ip.in6 = ifp->addr;  in netpoll_setup()
766 				np_err(np, "no IPv6 address for %s, aborting\n",  in netpoll_setup()
767 				       np->dev_name);  in netpoll_setup()
770 				np_info(np, "local IPv6 %pI6c\n", &np->local_ip.in6);  in netpoll_setup()
772 			np_err(np, "IPv6 is not supported %s, aborting\n",  in netpoll_setup()
773 			       np->dev_name);  in netpoll_setup()
783 	err = __netpoll_setup(np, ndev);  in netpoll_setup()
790 	netdev_put(ndev, &np->dev_tracker);  in netpoll_setup()
821 void __netpoll_cleanup(struct netpoll *np)  in __netpoll_cleanup()  argument
825 	npinfo = rtnl_dereference(np->dev->npinfo);  in __netpoll_cleanup()
834 		ops = np->dev->netdev_ops;  in __netpoll_cleanup()
836 			ops->ndo_netpoll_cleanup(np->dev);  in __netpoll_cleanup()
838 		RCU_INIT_POINTER(np->dev->npinfo, NULL);  in __netpoll_cleanup()
841 		RCU_INIT_POINTER(np->dev->npinfo, NULL);  in __netpoll_cleanup()
845 void __netpoll_free(struct netpoll *np)  in __netpoll_free()  argument
851 	__netpoll_cleanup(np);  in __netpoll_free()
852 	kfree(np);  in __netpoll_free()
856 void netpoll_cleanup(struct netpoll *np)  in netpoll_cleanup()  argument
859 	if (!np->dev)  in netpoll_cleanup()
861 	__netpoll_cleanup(np);  in netpoll_cleanup()
862 	netdev_put(np->dev, &np->dev_tracker);  in netpoll_cleanup()
863 	np->dev = NULL;  in netpoll_cleanup()