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92 lines
3.0 KiB
92 lines
3.0 KiB
From: Felix Fietkau <nbd@nbd.name>
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Subject: [PATCH] bridge: port isolate
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Isolating individual bridge ports
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---
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--- a/net/bridge/br_private.h
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+++ b/net/bridge/br_private.h
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@@ -172,6 +172,7 @@ struct net_bridge_port
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#define BR_FLOOD 0x00000040
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#define BR_AUTO_MASK (BR_FLOOD | BR_LEARNING)
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#define BR_PROMISC 0x00000080
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+#define BR_ISOLATE_MODE 0x00000100
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#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
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struct bridge_mcast_own_query ip4_own_query;
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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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@@ -170,6 +170,7 @@ BRPORT_ATTR_FLAG(bpdu_guard, BR_BPDU_GUA
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BRPORT_ATTR_FLAG(root_block, BR_ROOT_BLOCK);
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BRPORT_ATTR_FLAG(learning, BR_LEARNING);
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BRPORT_ATTR_FLAG(unicast_flood, BR_FLOOD);
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+BRPORT_ATTR_FLAG(isolated, 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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@@ -213,6 +214,7 @@ static const struct brport_attribute *br
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&brport_attr_multicast_router,
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&brport_attr_multicast_fast_leave,
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#endif
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+ &brport_attr_isolated,
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NULL
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};
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--- a/net/bridge/br_input.c
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+++ b/net/bridge/br_input.c
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@@ -120,8 +120,8 @@ int br_handle_frame_finish(struct sk_buf
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unicast = false;
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br->dev->stats.multicast++;
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- } else if ((dst = __br_fdb_get(br, dest, vid)) &&
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- dst->is_local) {
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+ } else if ((p->flags & BR_ISOLATE_MODE) ||
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+ ((dst = __br_fdb_get(br, dest, vid)) && dst->is_local)) {
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skb2 = skb;
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/* Do not forward the packet since it's local. */
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skb = NULL;
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--- a/net/bridge/br_forward.c
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+++ b/net/bridge/br_forward.c
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@@ -117,7 +117,7 @@ EXPORT_SYMBOL_GPL(br_deliver);
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/* called with rcu_read_lock */
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void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, struct sk_buff *skb0)
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{
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- if (should_deliver(to, skb)) {
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+ if (should_deliver(to, skb) && !(to->flags & BR_ISOLATE_MODE)) {
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if (skb0)
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deliver_clone(to, skb, __br_forward);
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else
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@@ -173,7 +173,7 @@ static void br_flood(struct net_bridge *
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struct sk_buff *skb0,
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void (*__packet_hook)(const struct net_bridge_port *p,
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struct sk_buff *skb),
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- bool unicast)
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+ bool unicast, bool forward)
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{
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struct net_bridge_port *p;
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struct net_bridge_port *prev;
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@@ -181,6 +181,8 @@ static void br_flood(struct net_bridge *
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prev = NULL;
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list_for_each_entry_rcu(p, &br->port_list, list) {
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+ if (forward && (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 (unicast && !(p->flags & BR_FLOOD))
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continue;
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@@ -207,14 +209,14 @@ out:
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/* called with rcu_read_lock */
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void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast)
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{
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- br_flood(br, skb, NULL, __br_deliver, unicast);
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+ br_flood(br, skb, NULL, __br_deliver, unicast, false);
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}
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/* called under bridge lock */
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void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
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struct sk_buff *skb2, bool unicast)
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{
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- br_flood(br, skb, skb2, __br_forward, unicast);
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+ br_flood(br, skb, skb2, __br_forward, unicast, true);
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}
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#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
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