From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/net/bridge/br_forward.c | 42 ++++++++++++++++++++++--------------------
1 files changed, 22 insertions(+), 20 deletions(-)
diff --git a/kernel/net/bridge/br_forward.c b/kernel/net/bridge/br_forward.c
index 48ddc60..4610f3a 100644
--- a/kernel/net/bridge/br_forward.c
+++ b/kernel/net/bridge/br_forward.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Forwarding decision
* Linux ethernet bridge
*
* Authors:
* Lennert Buytenhek <buytenh@gnu.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
#include <linux/err.h>
@@ -29,7 +25,7 @@
vg = nbp_vlan_group_rcu(p);
return ((p->flags & BR_HAIRPIN_MODE) || skb->dev != p->dev) &&
- br_allowed_egress(vg, skb) && p->state == BR_STATE_FORWARDING &&
+ p->state == BR_STATE_FORWARDING && br_allowed_egress(vg, skb) &&
nbp_switchdev_allowed_egress(p, skb) &&
!br_skb_isolated(p, skb);
}
@@ -47,7 +43,7 @@
skb->protocol == htons(ETH_P_8021AD))) {
int depth;
- if (!__vlan_get_protocol(skb, skb->protocol, &depth))
+ if (!vlan_get_protocol_and_depth(skb, skb->protocol, &depth))
goto drop;
skb_set_network_header(skb, depth);
@@ -173,6 +169,7 @@
struct net_bridge_port *prev, struct net_bridge_port *p,
struct sk_buff *skb, bool local_orig)
{
+ u8 igmp_type = br_multicast_igmp_type(skb);
int err;
if (!should_deliver(p, skb))
@@ -184,8 +181,9 @@
err = deliver_clone(prev, skb, local_orig);
if (err)
return ERR_PTR(err);
-
out:
+ br_multicast_count(p->br, p, skb, igmp_type, BR_MCAST_DIR_TX);
+
return p;
}
@@ -193,7 +191,6 @@
void br_flood(struct net_bridge *br, struct sk_buff *skb,
enum br_pkt_type pkt_type, bool local_rcv, bool local_orig)
{
- u8 igmp_type = br_multicast_igmp_type(skb);
struct net_bridge_port *prev = NULL;
struct net_bridge_port *p;
@@ -226,9 +223,6 @@
prev = maybe_deliver(prev, p, skb, local_orig);
if (IS_ERR(prev))
goto out;
- if (prev == p)
- br_multicast_count(p->br, p, skb, igmp_type,
- BR_MCAST_DIR_TX);
}
if (!prev)
@@ -277,18 +271,26 @@
bool local_rcv, bool local_orig)
{
struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev;
- u8 igmp_type = br_multicast_igmp_type(skb);
struct net_bridge *br = netdev_priv(dev);
struct net_bridge_port *prev = NULL;
struct net_bridge_port_group *p;
+ bool allow_mode_include = true;
struct hlist_node *rp;
rp = rcu_dereference(hlist_first_rcu(&br->router_list));
- p = mdst ? rcu_dereference(mdst->ports) : NULL;
+ if (mdst) {
+ p = rcu_dereference(mdst->ports);
+ if (br_multicast_should_handle_mode(br, mdst->addr.proto) &&
+ br_multicast_is_star_g(&mdst->addr))
+ allow_mode_include = false;
+ } else {
+ p = NULL;
+ }
+
while (p || rp) {
struct net_bridge_port *port, *lport, *rport;
- lport = p ? p->port : NULL;
+ lport = p ? p->key.port : NULL;
rport = hlist_entry_safe(rp, struct net_bridge_port, rlist);
if ((unsigned long)lport > (unsigned long)rport) {
@@ -299,18 +301,18 @@
local_orig);
goto delivered;
}
+ if ((!allow_mode_include &&
+ p->filter_mode == MCAST_INCLUDE) ||
+ (p->flags & MDB_PG_FLAGS_BLOCKED))
+ goto delivered;
} else {
port = rport;
}
prev = maybe_deliver(prev, port, skb, local_orig);
-delivered:
if (IS_ERR(prev))
goto out;
- if (prev == port)
- br_multicast_count(port->br, port, skb, igmp_type,
- BR_MCAST_DIR_TX);
-
+delivered:
if ((unsigned long)lport >= (unsigned long)port)
p = rcu_dereference(p->next);
if ((unsigned long)rport >= (unsigned long)port)
--
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