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From e988390850731aa1697ed09d47b0932fac1af175 Mon Sep 17 00:00:00 2001
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From: Felix Fietkau <nbd@nbd.name>
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Date: Fri, 7 Jul 2017 17:20:03 +0200
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Subject: bridge: port isolate
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Isolating individual bridge ports
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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include/linux/if_bridge.h | 1 +
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net/bridge/br_forward.c | 5 +++++
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net/bridge/br_input.c | 3 +++
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net/bridge/br_sysfs_if.c | 2 ++
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4 files changed, 11 insertions(+)
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--- a/include/linux/if_bridge.h
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+++ b/include/linux/if_bridge.h
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@@ -47,6 +47,7 @@ struct br_ip_list {
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#define BR_PROXYARP_WIFI BIT(10)
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#define BR_MCAST_FLOOD BIT(11)
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#define BR_MULTICAST_TO_UNICAST BIT(12)
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+#define BR_ISOLATE_MODE BIT(13)
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#define BR_DEFAULT_AGEING_TIME (300 * HZ)
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--- a/net/bridge/br_forward.c
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+++ b/net/bridge/br_forward.c
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@@ -141,6 +141,9 @@ static int deliver_clone(const struct ne
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void br_forward(const struct net_bridge_port *to,
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struct sk_buff *skb, bool local_rcv, bool local_orig)
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{
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+ if (to->flags & BR_ISOLATE_MODE)
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+ to = NULL;
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+
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if (to && should_deliver(to, skb)) {
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if (local_rcv)
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deliver_clone(to, skb, local_orig);
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@@ -206,6 +209,8 @@ void br_flood(struct net_bridge *br, str
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struct net_bridge_port *p;
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list_for_each_entry_rcu(p, &br->port_list, list) {
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+ if (!local_orig && (p->flags & BR_ISOLATE_MODE))
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+ continue;
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/* Do not flood unicast traffic to ports that turn it off */
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if (pkt_type == BR_PKT_UNICAST && !(p->flags & BR_FLOOD))
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continue;
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--- a/net/bridge/br_input.c
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+++ b/net/bridge/br_input.c
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@@ -175,6 +175,9 @@ int br_handle_frame_finish(struct net *n
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if (IS_ENABLED(CONFIG_INET) && skb->protocol == htons(ETH_P_ARP))
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br_do_proxy_arp(skb, br, vid, p);
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+ if (p->flags & BR_ISOLATE_MODE)
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+ return br_pass_frame_up(skb);
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+
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switch (pkt_type) {
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case BR_PKT_MULTICAST:
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mdst = br_mdb_get(br, skb, vid);
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--- a/net/bridge/br_sysfs_if.c
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+++ b/net/bridge/br_sysfs_if.c
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@@ -172,6 +172,7 @@ BRPORT_ATTR_FLAG(unicast_flood, BR_FLOOD
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BRPORT_ATTR_FLAG(proxyarp, BR_PROXYARP);
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BRPORT_ATTR_FLAG(proxyarp_wifi, BR_PROXYARP_WIFI);
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BRPORT_ATTR_FLAG(multicast_flood, BR_MCAST_FLOOD);
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+BRPORT_ATTR_FLAG(isolate_mode, BR_ISOLATE_MODE);
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#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
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static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)
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@@ -220,6 +221,7 @@ static const struct brport_attribute *br
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&brport_attr_proxyarp,
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&brport_attr_proxyarp_wifi,
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&brport_attr_multicast_flood,
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+ &brport_attr_isolate_mode,
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NULL
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};
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