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
413 	if (np->ipv6)  in netpoll_send_udp()
418 	total_len = ip_len + LL_RESERVED_SPACE(np->dev);  in netpoll_send_udp()
420 	skb = find_skb(np, total_len + np->dev->needed_tailroom,  in netpoll_send_udp()
431 	udph->source = htons(np->local_port);  in netpoll_send_udp()
432 	udph->dest = htons(np->remote_port);  in netpoll_send_udp()
435 	if (np->ipv6) {  in netpoll_send_udp()
437 		udph->check = csum_ipv6_magic(&np->local_ip.in6,  in netpoll_send_udp()
438 					      &np->remote_ip.in6,  in netpoll_send_udp()
457 		ip6h->saddr = np->local_ip.in6;  in netpoll_send_udp()
458 		ip6h->daddr = np->remote_ip.in6;  in netpoll_send_udp()
465 		udph->check = csum_tcpudp_magic(np->local_ip.ip,  in netpoll_send_udp()
466 						np->remote_ip.ip,  in netpoll_send_udp()
485 		put_unaligned(np->local_ip.ip, &(iph->saddr));  in netpoll_send_udp()
486 		put_unaligned(np->remote_ip.ip, &(iph->daddr));  in netpoll_send_udp()
494 	ether_addr_copy(eth->h_source, np->dev->dev_addr);  in netpoll_send_udp()
495 	ether_addr_copy(eth->h_dest, np->remote_mac);  in netpoll_send_udp()
497 	skb->dev = np->dev;  in netpoll_send_udp()
499 	netpoll_send_skb(np, skb);  in netpoll_send_udp()
503 void netpoll_print_options(struct netpoll *np)  in netpoll_print_options()  argument
505 	np_info(np, "local port %d\n", np->local_port);  in netpoll_print_options()
506 	if (np->ipv6)  in netpoll_print_options()
507 		np_info(np, "local IPv6 address %pI6c\n", &np->local_ip.in6);  in netpoll_print_options()
509 		np_info(np, "local IPv4 address %pI4\n", &np->local_ip.ip);  in netpoll_print_options()
510 	np_info(np, "interface '%s'\n", np->dev_name);  in netpoll_print_options()
511 	np_info(np, "remote port %d\n", np->remote_port);  in netpoll_print_options()
512 	if (np->ipv6)  in netpoll_print_options()
513 		np_info(np, "remote IPv6 address %pI6c\n", &np->remote_ip.in6);  in netpoll_print_options()
515 		np_info(np, "remote IPv4 address %pI4\n", &np->remote_ip.ip);  in netpoll_print_options()
516 	np_info(np, "remote ethernet address %pM\n", np->remote_mac);  in netpoll_print_options()
540 int netpoll_parse_options(struct netpoll *np, char *opt)  in netpoll_parse_options()  argument
550 		if (kstrtou16(cur, 10, &np->local_port))  in netpoll_parse_options()
561 		ipv6 = netpoll_parse_ip_addr(cur, &np->local_ip);  in netpoll_parse_options()
565 			np->ipv6 = (bool)ipv6;  in netpoll_parse_options()
575 		strlcpy(np->dev_name, cur, sizeof(np->dev_name));  in netpoll_parse_options()
586 			np_info(np, "warning: whitespace is not allowed\n");  in netpoll_parse_options()
587 		if (kstrtou16(cur, 10, &np->remote_port))  in netpoll_parse_options()
597 	ipv6 = netpoll_parse_ip_addr(cur, &np->remote_ip);  in netpoll_parse_options()
600 	else if (ipversion_set && np->ipv6 != (bool)ipv6)  in netpoll_parse_options()
603 		np->ipv6 = (bool)ipv6;  in netpoll_parse_options()
608 		if (!mac_pton(cur, np->remote_mac))  in netpoll_parse_options()
612 	netpoll_print_options(np);  in netpoll_parse_options()
617 	np_info(np, "couldn't parse config at '%s'!\n", cur);  in netpoll_parse_options()
622 int __netpoll_setup(struct netpoll *np, struct net_device *ndev)  in __netpoll_setup()  argument
628 	np->dev = ndev;  in __netpoll_setup()
629 	strlcpy(np->dev_name, ndev->name, IFNAMSIZ);  in __netpoll_setup()
632 		np_err(np, "%s doesn't support polling, aborting\n",  in __netpoll_setup()
633 		       np->dev_name);  in __netpoll_setup()
651 		ops = np->dev->netdev_ops;  in __netpoll_setup()
662 	npinfo->netpoll = np;  in __netpoll_setup()
676 int netpoll_setup(struct netpoll *np)  in netpoll_setup()  argument
684 	if (np->dev_name[0])  in netpoll_setup()
685 		ndev = __dev_get_by_name(net, np->dev_name);  in netpoll_setup()
688 		np_err(np, "%s doesn't exist, aborting\n", np->dev_name);  in netpoll_setup()
701 			np_err(np, "%s failed to open %s\n",  in netpoll_setup()
702 			       np->dev_name, dev->name);  in netpoll_setup()
708 		np_err(np, "%s is a slave device, aborting\n", np->dev_name);  in netpoll_setup()
716 		np_info(np, "device %s not up yet, forcing it\n", np->dev_name);  in netpoll_setup()
721 			np_err(np, "failed to open %s\n", ndev->name);  in netpoll_setup()
730 				np_notice(np, "timeout waiting for carrier\n");  in netpoll_setup()
742 			np_notice(np, "carrier detect appears untrustworthy, waiting 4 seconds\n");  in netpoll_setup()
748 	if (!np->local_ip.ip) {  in netpoll_setup()
749 		if (!np->ipv6) {  in netpoll_setup()
759 				np_err(np, "no IP address for %s, aborting\n",  in netpoll_setup()
760 				       np->dev_name);  in netpoll_setup()
765 			np->local_ip.ip = ifa->ifa_local;  in netpoll_setup()
766 			np_info(np, "local IP %pI4\n", &np->local_ip.ip);  in netpoll_setup()
779 					    !!(ipv6_addr_type(&np->remote_ip.in6) & IPV6_ADDR_LINKLOCAL))  in netpoll_setup()
781 					np->local_ip.in6 = ifp->addr;  in netpoll_setup()
788 				np_err(np, "no IPv6 address for %s, aborting\n",  in netpoll_setup()
789 				       np->dev_name);  in netpoll_setup()
792 				np_info(np, "local IPv6 %pI6c\n", &np->local_ip.in6);  in netpoll_setup()
794 			np_err(np, "IPv6 is not supported %s, aborting\n",  in netpoll_setup()
795 			       np->dev_name);  in netpoll_setup()
805 	err = __netpoll_setup(np, ndev);  in netpoll_setup()
844 void __netpoll_cleanup(struct netpoll *np)  in __netpoll_cleanup()  argument
848 	npinfo = rtnl_dereference(np->dev->npinfo);  in __netpoll_cleanup()
857 		ops = np->dev->netdev_ops;  in __netpoll_cleanup()
859 			ops->ndo_netpoll_cleanup(np->dev);  in __netpoll_cleanup()
861 		RCU_INIT_POINTER(np->dev->npinfo, NULL);  in __netpoll_cleanup()
864 		RCU_INIT_POINTER(np->dev->npinfo, NULL);  in __netpoll_cleanup()
868 void __netpoll_free(struct netpoll *np)  in __netpoll_free()  argument
874 	__netpoll_cleanup(np);  in __netpoll_free()
875 	kfree(np);  in __netpoll_free()
879 void netpoll_cleanup(struct netpoll *np)  in netpoll_cleanup()  argument
882 	if (!np->dev)  in netpoll_cleanup()
884 	__netpoll_cleanup(np);  in netpoll_cleanup()
885 	dev_put(np->dev);  in netpoll_cleanup()
886 	np->dev = NULL;  in netpoll_cleanup()