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From e988390850731aa1697ed09d47b0932fac1af175 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Fri, 7 Jul 2017 17:20:03 +0200
Subject: bridge: port isolate
Isolating individual bridge ports
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
include/linux/if_bridge.h | 1 +
net/bridge/br_forward.c | 5 +++++
net/bridge/br_input.c | 3 +++
net/bridge/br_sysfs_if.c | 2 ++
4 files changed, 11 insertions(+)
--- a/include/linux/if_bridge.h
+++ b/include/linux/if_bridge.h
@@ -49,6 +49,7 @@ struct br_ip_list {
#define BR_MULTICAST_TO_UNICAST BIT(12)
#define BR_VLAN_TUNNEL BIT(13)
#define BR_BCAST_FLOOD BIT(14)
+#define BR_ISOLATE_MODE BIT(15)
#define BR_DEFAULT_AGEING_TIME (300 * HZ)
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -141,6 +141,9 @@ static int deliver_clone(const struct ne
void br_forward(const struct net_bridge_port *to,
struct sk_buff *skb, bool local_rcv, bool local_orig)
{
+ if (to->flags & BR_ISOLATE_MODE)
+ to = NULL;
+
if (to && should_deliver(to, skb)) {
if (local_rcv)
deliver_clone(to, skb, local_orig);
@@ -183,6 +186,8 @@ void br_flood(struct net_bridge *br, str
struct net_bridge_port *p;
list_for_each_entry_rcu(p, &br->port_list, list) {
+ if (!local_orig && (p->flags & BR_ISOLATE_MODE))
+ continue;
/* Do not flood unicast traffic to ports that turn it off, nor
* other traffic if flood off, except for traffic we originate
*/
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -177,6 +177,9 @@ int br_handle_frame_finish(struct net *n
if (IS_ENABLED(CONFIG_INET) && skb->protocol == htons(ETH_P_ARP))
br_do_proxy_arp(skb, br, vid, p);
+ if (p->flags & BR_ISOLATE_MODE)
+ return br_pass_frame_up(skb);
+
switch (pkt_type) {
case BR_PKT_MULTICAST:
mdst = br_mdb_get(br, skb, vid);
--- a/net/bridge/br_sysfs_if.c
+++ b/net/bridge/br_sysfs_if.c
@@ -174,6 +174,7 @@ BRPORT_ATTR_FLAG(proxyarp, BR_PROXYARP);
BRPORT_ATTR_FLAG(proxyarp_wifi, BR_PROXYARP_WIFI);
BRPORT_ATTR_FLAG(multicast_flood, BR_MCAST_FLOOD);
BRPORT_ATTR_FLAG(broadcast_flood, BR_BCAST_FLOOD);
+BRPORT_ATTR_FLAG(isolate_mode, BR_ISOLATE_MODE);
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)
@@ -223,6 +224,7 @@ static const struct brport_attribute *br
&brport_attr_proxyarp_wifi,
&brport_attr_multicast_flood,
&brport_attr_broadcast_flood,
+ &brport_attr_isolate_mode,
NULL
};
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