123 static void *ipvlan_get_L3_hdr(struct sk_buff *skb, int *type)  in ipvlan_get_L3_hdr()  argument
127 	switch (skb->protocol) {  in ipvlan_get_L3_hdr()
131 		if (unlikely(!pskb_may_pull(skb, sizeof(*arph))))  in ipvlan_get_L3_hdr()
134 		arph = arp_hdr(skb);  in ipvlan_get_L3_hdr()
143 		if (unlikely(!pskb_may_pull(skb, sizeof(*ip4h))))  in ipvlan_get_L3_hdr()
146 		ip4h = ip_hdr(skb);  in ipvlan_get_L3_hdr()
150 		if (skb->len < pktlen || pktlen < (ip4h->ihl * 4))  in ipvlan_get_L3_hdr()
160 		if (unlikely(!pskb_may_pull(skb, sizeof(*ip6h))))  in ipvlan_get_L3_hdr()
163 		ip6h = ipv6_hdr(skb);  in ipvlan_get_L3_hdr()
192 static void ipvlan_multicast_frame(struct ipvl_port *port, struct sk_buff *skb,  in ipvlan_multicast_frame()  argument
195 	struct ethhdr *eth = eth_hdr(skb);  in ipvlan_multicast_frame()
202 	if (skb->protocol == htons(ETH_P_PAUSE))  in ipvlan_multicast_frame()
215 		len = skb->len + ETH_HLEN;  in ipvlan_multicast_frame()
216 		nskb = skb_clone(skb, GFP_ATOMIC);  in ipvlan_multicast_frame()
240 		nskb = skb_clone(skb, GFP_ATOMIC);  in ipvlan_multicast_frame()
252 static int ipvlan_rcv_frame(struct ipvl_addr *addr, struct sk_buff *skb,  in ipvlan_rcv_frame()  argument
261 	len = skb->len + ETH_HLEN;  in ipvlan_rcv_frame()
263 		kfree_skb(skb);  in ipvlan_rcv_frame()
267 	skb = skb_share_check(skb, GFP_ATOMIC);  in ipvlan_rcv_frame()
268 	if (!skb)  in ipvlan_rcv_frame()
271 	skb->dev = dev;  in ipvlan_rcv_frame()
272 	skb->pkt_type = PACKET_HOST;  in ipvlan_rcv_frame()
275 		if (dev_forward_skb(ipvlan->dev, skb) == NET_RX_SUCCESS)  in ipvlan_rcv_frame()
338 static int ipvlan_process_v4_outbound(struct sk_buff *skb)  in ipvlan_process_v4_outbound()  argument
340 	const struct iphdr *ip4h = ip_hdr(skb);  in ipvlan_process_v4_outbound()
341 	struct net_device *dev = skb->dev;  in ipvlan_process_v4_outbound()
360 	skb_dst_drop(skb);  in ipvlan_process_v4_outbound()
361 	skb_dst_set(skb, &rt->dst);  in ipvlan_process_v4_outbound()
362 	err = ip_local_out(skb);  in ipvlan_process_v4_outbound()
370 	kfree_skb(skb);  in ipvlan_process_v4_outbound()
375 static int ipvlan_process_v6_outbound(struct sk_buff *skb)  in ipvlan_process_v6_outbound()  argument
377 	const struct ipv6hdr *ip6h = ipv6_hdr(skb);  in ipvlan_process_v6_outbound()
378 	struct net_device *dev = skb->dev;  in ipvlan_process_v6_outbound()
382 		.flowi6_iif = skb->dev->ifindex,  in ipvlan_process_v6_outbound()
387 		.flowi6_mark = skb->mark,  in ipvlan_process_v6_outbound()
397 	skb_dst_drop(skb);  in ipvlan_process_v6_outbound()
398 	skb_dst_set(skb, dst);  in ipvlan_process_v6_outbound()
399 	err = ip6_local_out(skb);  in ipvlan_process_v6_outbound()
407 	kfree_skb(skb);  in ipvlan_process_v6_outbound()
412 static int ipvlan_process_outbound(struct sk_buff *skb,  in ipvlan_process_outbound()  argument
415 	struct ethhdr *ethh = eth_hdr(skb);  in ipvlan_process_outbound()
421 				    ntohs(skb->protocol));  in ipvlan_process_outbound()
422 		kfree_skb(skb);  in ipvlan_process_outbound()
430 	if (skb_mac_header_was_set(skb)) {  in ipvlan_process_outbound()
431 		skb_pull(skb, sizeof(*ethh));  in ipvlan_process_outbound()
432 		skb->mac_header = (typeof(skb->mac_header))~0U;  in ipvlan_process_outbound()
433 		skb_reset_network_header(skb);  in ipvlan_process_outbound()
436 	if (skb->protocol == htons(ETH_P_IPV6))  in ipvlan_process_outbound()
437 		ret = ipvlan_process_v6_outbound(skb);  in ipvlan_process_outbound()
438 	else if (skb->protocol == htons(ETH_P_IP))  in ipvlan_process_outbound()
439 		ret = ipvlan_process_v4_outbound(skb);  in ipvlan_process_outbound()
442 				    ntohs(skb->protocol));  in ipvlan_process_outbound()
443 		kfree_skb(skb);  in ipvlan_process_outbound()
449 static int ipvlan_xmit_mode_l3(struct sk_buff *skb, struct net_device *dev)  in ipvlan_xmit_mode_l3()  argument
456 	lyr3h = ipvlan_get_L3_hdr(skb, &addr_type);  in ipvlan_xmit_mode_l3()
462 		return ipvlan_rcv_frame(addr, skb, true);  in ipvlan_xmit_mode_l3()
465 	skb->dev = ipvlan->phy_dev;  in ipvlan_xmit_mode_l3()
466 	return ipvlan_process_outbound(skb, ipvlan);  in ipvlan_xmit_mode_l3()
469 static int ipvlan_xmit_mode_l2(struct sk_buff *skb, struct net_device *dev)  in ipvlan_xmit_mode_l2()  argument
472 	struct ethhdr *eth = eth_hdr(skb);  in ipvlan_xmit_mode_l2()
478 		lyr3h = ipvlan_get_L3_hdr(skb, &addr_type);  in ipvlan_xmit_mode_l2()
482 				return ipvlan_rcv_frame(addr, skb, true);  in ipvlan_xmit_mode_l2()
484 		skb = skb_share_check(skb, GFP_ATOMIC);  in ipvlan_xmit_mode_l2()
485 		if (!skb)  in ipvlan_xmit_mode_l2()
493 		return dev_forward_skb(ipvlan->phy_dev, skb);  in ipvlan_xmit_mode_l2()
496 		u8 ip_summed = skb->ip_summed;  in ipvlan_xmit_mode_l2()
498 		skb->ip_summed = CHECKSUM_UNNECESSARY;  in ipvlan_xmit_mode_l2()
499 		ipvlan_multicast_frame(ipvlan->port, skb, ipvlan, true);  in ipvlan_xmit_mode_l2()
500 		skb->ip_summed = ip_summed;  in ipvlan_xmit_mode_l2()
503 	skb->dev = ipvlan->phy_dev;  in ipvlan_xmit_mode_l2()
504 	return dev_queue_xmit(skb);  in ipvlan_xmit_mode_l2()
507 int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)  in ipvlan_queue_xmit()  argument
515 	if (unlikely(!pskb_may_pull(skb, sizeof(struct ethhdr))))  in ipvlan_queue_xmit()
520 		return ipvlan_xmit_mode_l2(skb, dev);  in ipvlan_queue_xmit()
522 		return ipvlan_xmit_mode_l3(skb, dev);  in ipvlan_queue_xmit()
529 	kfree_skb(skb);  in ipvlan_queue_xmit()
533 static bool ipvlan_external_frame(struct sk_buff *skb, struct ipvl_port *port)  in ipvlan_external_frame()  argument
535 	struct ethhdr *eth = eth_hdr(skb);  in ipvlan_external_frame()
540 	if (ether_addr_equal(eth->h_source, skb->dev->dev_addr)) {  in ipvlan_external_frame()
541 		lyr3h = ipvlan_get_L3_hdr(skb, &addr_type);  in ipvlan_external_frame()
559 	struct sk_buff *skb = *pskb;  in ipvlan_handle_mode_l3()  local
562 	lyr3h = ipvlan_get_L3_hdr(skb, &addr_type);  in ipvlan_handle_mode_l3()
568 		ret = ipvlan_rcv_frame(addr, skb, false);  in ipvlan_handle_mode_l3()
577 	struct sk_buff *skb = *pskb;  in ipvlan_handle_mode_l2()  local
578 	struct ethhdr *eth = eth_hdr(skb);  in ipvlan_handle_mode_l2()
584 		if (ipvlan_external_frame(skb, port))  in ipvlan_handle_mode_l2()
585 			ipvlan_multicast_frame(port, skb, NULL, false);  in ipvlan_handle_mode_l2()
589 		lyr3h = ipvlan_get_L3_hdr(skb, &addr_type);  in ipvlan_handle_mode_l2()
595 			ret = ipvlan_rcv_frame(addr, skb, false);  in ipvlan_handle_mode_l2()
603 	struct sk_buff *skb = *pskb;  in ipvlan_handle_frame()  local
604 	struct ipvl_port *port = ipvlan_port_get_rcu(skb->dev);  in ipvlan_handle_frame()
619 	kfree_skb(skb);  in ipvlan_handle_frame()