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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/net/bridge/br_forward.c
..
..
@@ -1,14 +1,10 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *	Forwarding decision
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  *	Linux ethernet bridge
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  *
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  *	Authors:
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  *	Lennert Buytenhek		<buytenh@gnu.org>
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- *
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- *	This program is free software; you can redistribute it and/or
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- *	modify it under the terms of the GNU General Public License
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- *	as published by the Free Software Foundation; either version
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- *	2 of the License, or (at your option) any later version.
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8
  */
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9
 
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10
 #include <linux/err.h>
..
..
@@ -29,7 +25,7 @@
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25
 
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 	vg = nbp_vlan_group_rcu(p);
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 	return ((p->flags & BR_HAIRPIN_MODE) || skb->dev != p->dev) &&
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-		br_allowed_egress(vg, skb) && p->state == BR_STATE_FORWARDING &&
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+		p->state == BR_STATE_FORWARDING && br_allowed_egress(vg, skb) &&
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29
 		nbp_switchdev_allowed_egress(p, skb) &&
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 		!br_skb_isolated(p, skb);
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31
 }
..
..
@@ -47,7 +43,7 @@
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 	     skb->protocol == htons(ETH_P_8021AD))) {
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 		int depth;
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45
 
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-		if (!__vlan_get_protocol(skb, skb->protocol, &depth))
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+		if (!vlan_get_protocol_and_depth(skb, skb->protocol, &depth))
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47
 			goto drop;
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48
 
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 		skb_set_network_header(skb, depth);
..
..
@@ -173,6 +169,7 @@
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169
 	struct net_bridge_port *prev, struct net_bridge_port *p,
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 	struct sk_buff *skb, bool local_orig)
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 {
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+	u8 igmp_type = br_multicast_igmp_type(skb);
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 	int err;
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174
 
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 	if (!should_deliver(p, skb))
..
..
@@ -184,8 +181,9 @@
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 	err = deliver_clone(prev, skb, local_orig);
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182
 	if (err)
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 		return ERR_PTR(err);
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-
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184
 out:
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+	br_multicast_count(p->br, p, skb, igmp_type, BR_MCAST_DIR_TX);
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+
189
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 	return p;
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188
 }
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189
 
..
..
@@ -193,7 +191,6 @@
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 void br_flood(struct net_bridge *br, struct sk_buff *skb,
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 	      enum br_pkt_type pkt_type, bool local_rcv, bool local_orig)
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193
 {
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-	u8 igmp_type = br_multicast_igmp_type(skb);
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 	struct net_bridge_port *prev = NULL;
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195
 	struct net_bridge_port *p;
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196
 
..
..
@@ -226,9 +223,6 @@
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 		prev = maybe_deliver(prev, p, skb, local_orig);
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 		if (IS_ERR(prev))
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225
 			goto out;
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-		if (prev == p)
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-			br_multicast_count(p->br, p, skb, igmp_type,
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-					   BR_MCAST_DIR_TX);
232
226
 	}
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227
 
234
228
 	if (!prev)
..
..
@@ -277,18 +271,26 @@
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 			bool local_rcv, bool local_orig)
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272
 {
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 	struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev;
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-	u8 igmp_type = br_multicast_igmp_type(skb);
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 	struct net_bridge *br = netdev_priv(dev);
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 	struct net_bridge_port *prev = NULL;
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 	struct net_bridge_port_group *p;
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+	bool allow_mode_include = true;
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 	struct hlist_node *rp;
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279
 
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 	rp = rcu_dereference(hlist_first_rcu(&br->router_list));
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-	p = mdst ? rcu_dereference(mdst->ports) : NULL;
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+	if (mdst) {
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+		p = rcu_dereference(mdst->ports);
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+		if (br_multicast_should_handle_mode(br, mdst->addr.proto) &&
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+		    br_multicast_is_star_g(&mdst->addr))
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+			allow_mode_include = false;
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+	} else {
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+		p = NULL;
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+	}
289
+
288
290
 	while (p || rp) {
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291
 		struct net_bridge_port *port, *lport, *rport;
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292
 
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-		lport = p ? p->port : NULL;
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+		lport = p ? p->key.port : NULL;
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 		rport = hlist_entry_safe(rp, struct net_bridge_port, rlist);
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295
 
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 		if ((unsigned long)lport > (unsigned long)rport) {
..
..
@@ -299,18 +301,18 @@
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 						   local_orig);
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 				goto delivered;
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 			}
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+			if ((!allow_mode_include &&
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+			     p->filter_mode == MCAST_INCLUDE) ||
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+			    (p->flags & MDB_PG_FLAGS_BLOCKED))
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+				goto delivered;
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 		} else {
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 			port = rport;
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 		}
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311
 
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 		prev = maybe_deliver(prev, port, skb, local_orig);
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-delivered:
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 		if (IS_ERR(prev))
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 			goto out;
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-		if (prev == port)
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-			br_multicast_count(port->br, port, skb, igmp_type,
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-					   BR_MCAST_DIR_TX);
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-
315
+delivered:
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 		if ((unsigned long)lport >= (unsigned long)port)
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 			p = rcu_dereference(p->next);
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318
 		if ((unsigned long)rport >= (unsigned long)port)