29 static int br_pass_frame_up(struct sk_buff *skb)  in br_pass_frame_up()  argument
31 	struct net_device *indev, *brdev = BR_INPUT_SKB_CB(skb)->brdev;  in br_pass_frame_up()
38 	brstats->rx_bytes += skb->len;  in br_pass_frame_up()
47 	    !br_allowed_egress(br, pv, skb)) {  in br_pass_frame_up()
48 		kfree_skb(skb);  in br_pass_frame_up()
52 	indev = skb->dev;  in br_pass_frame_up()
53 	skb->dev = brdev;  in br_pass_frame_up()
54 	skb = br_handle_vlan(br, pv, skb);  in br_pass_frame_up()
55 	if (!skb)  in br_pass_frame_up()
58 	return NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN, NULL, skb,  in br_pass_frame_up()
63 static void br_do_proxy_arp(struct sk_buff *skb, struct net_bridge *br,  in br_do_proxy_arp()  argument
72 	BR_INPUT_SKB_CB(skb)->proxyarp_replied = false;  in br_do_proxy_arp()
77 	if (!pskb_may_pull(skb, arp_hdr_len(dev))) {  in br_do_proxy_arp()
81 	parp = arp_hdr(skb);  in br_do_proxy_arp()
113 			arp_send(ARPOP_REPLY, ETH_P_ARP, sip, skb->dev, tip,  in br_do_proxy_arp()
115 			BR_INPUT_SKB_CB(skb)->proxyarp_replied = true;  in br_do_proxy_arp()
123 int br_handle_frame_finish(struct sock *sk, struct sk_buff *skb)  in br_handle_frame_finish()  argument
125 	const unsigned char *dest = eth_hdr(skb)->h_dest;  in br_handle_frame_finish()
126 	struct net_bridge_port *p = br_port_get_rcu(skb->dev);  in br_handle_frame_finish()
137 	if (!br_allowed_ingress(p->br, nbp_get_vlan_info(p), skb, &vid))  in br_handle_frame_finish()
143 		br_fdb_update(br, p, eth_hdr(skb)->h_source, vid, false);  in br_handle_frame_finish()
146 	    br_multicast_rcv(br, p, skb, vid))  in br_handle_frame_finish()
152 	BR_INPUT_SKB_CB(skb)->brdev = br->dev;  in br_handle_frame_finish()
158 		skb2 = skb;  in br_handle_frame_finish()
162 	if (IS_ENABLED(CONFIG_INET) && skb->protocol == htons(ETH_P_ARP))  in br_handle_frame_finish()
163 		br_do_proxy_arp(skb, br, vid, p);  in br_handle_frame_finish()
166 		skb2 = skb;  in br_handle_frame_finish()
169 		mdst = br_mdb_get(br, skb, vid);  in br_handle_frame_finish()
170 		if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&  in br_handle_frame_finish()
171 		    br_multicast_querier_exists(br, eth_hdr(skb))) {  in br_handle_frame_finish()
174 				skb2 = skb;  in br_handle_frame_finish()
175 			br_multicast_forward(mdst, skb, skb2);  in br_handle_frame_finish()
176 			skb = NULL;  in br_handle_frame_finish()
180 			skb2 = skb;  in br_handle_frame_finish()
186 		skb2 = skb;  in br_handle_frame_finish()
188 		skb = NULL;  in br_handle_frame_finish()
191 	if (skb) {  in br_handle_frame_finish()
194 			br_forward(dst->dst, skb, skb2);  in br_handle_frame_finish()
196 			br_flood_forward(br, skb, skb2, unicast);  in br_handle_frame_finish()
205 	kfree_skb(skb);  in br_handle_frame_finish()
211 static int br_handle_local_finish(struct sock *sk, struct sk_buff *skb)  in br_handle_local_finish()  argument
213 	struct net_bridge_port *p = br_port_get_rcu(skb->dev);  in br_handle_local_finish()
217 	if (p->flags & BR_LEARNING && br_should_learn(p, skb, &vid))  in br_handle_local_finish()
218 		br_fdb_update(p->br, p, eth_hdr(skb)->h_source, vid, false);  in br_handle_local_finish()
229 	struct sk_buff *skb = *pskb;  in br_handle_frame()  local
230 	const unsigned char *dest = eth_hdr(skb)->h_dest;  in br_handle_frame()
233 	if (unlikely(skb->pkt_type == PACKET_LOOPBACK))  in br_handle_frame()
236 	if (!is_valid_ether_addr(eth_hdr(skb)->h_source))  in br_handle_frame()
239 	skb = skb_share_check(skb, GFP_ATOMIC);  in br_handle_frame()
240 	if (!skb)  in br_handle_frame()
243 	p = br_port_get_rcu(skb->dev);  in br_handle_frame()
281 		if (NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN, NULL, skb,  in br_handle_frame()
282 			    skb->dev, NULL, br_handle_local_finish)) {  in br_handle_frame()
285 			*pskb = skb;  in br_handle_frame()
295 			if ((*rhook)(skb)) {  in br_handle_frame()
296 				*pskb = skb;  in br_handle_frame()
299 			dest = eth_hdr(skb)->h_dest;  in br_handle_frame()
304 			skb->pkt_type = PACKET_HOST;  in br_handle_frame()
306 		NF_HOOK(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, NULL, skb,  in br_handle_frame()
307 			skb->dev, NULL,  in br_handle_frame()
312 		kfree_skb(skb);  in br_handle_frame()