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kernel: replace bridge port isolate hack with upstream patch backport on 4.14

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Signed-off-by: Felix Fietkau <nbd@nbd.name>
v19.07.3_mercusys_ac12_duma
Felix Fietkau 6 years ago
parent 68f9921ed8
commit 21ee8ce9b5
3 changed files with 148 additions and 80 deletions
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145
target/linux/generic/backport-4.14/090-net-bridge-add-support-for-port-isolation.patch
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@ -0,0 +1,145 @@
From: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Date: Thu, 24 May 2018 11:56:48 +0300
Subject: [PATCH] net: bridge: add support for port isolation
This patch adds support for a new port flag - BR_ISOLATED. If it is set
then isolated ports cannot communicate between each other, but they can
still communicate with non-isolated ports. The same can be achieved via
ACLs but they can't scale with large number of ports and also the
complexity of the rules grows. This feature can be used to achieve
isolated vlan functionality (similar to pvlan) as well, though currently
it will be port-wide (for all vlans on the port). The new test in
should_deliver uses data that is already cache hot and the new boolean
is used to avoid an additional source port test in should_deliver.
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -326,6 +326,8 @@ enum {
IFLA_BRPORT_MCAST_TO_UCAST,
IFLA_BRPORT_VLAN_TUNNEL,
IFLA_BRPORT_BCAST_FLOOD,
+ IFLA_BRPORT_NEIGH_SUPPRESS,
+ IFLA_BRPORT_ISOLATED,
__IFLA_BRPORT_MAX
};
#define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1)
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -30,7 +30,8 @@ static inline int should_deliver(const s
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 &&
- nbp_switchdev_allowed_egress(p, skb);
+ nbp_switchdev_allowed_egress(p, skb) &&
+ !br_skb_isolated(p, skb);
}
int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb)
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -170,6 +170,7 @@ int br_handle_frame_finish(struct net *n
goto drop;
BR_INPUT_SKB_CB(skb)->brdev = br->dev;
+ BR_INPUT_SKB_CB(skb)->src_port_isolated = !!(p->flags & BR_ISOLATED);
if (IS_ENABLED(CONFIG_INET) && skb->protocol == htons(ETH_P_ARP))
br_do_proxy_arp(skb, br, vid, p);
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -138,6 +138,7 @@ static inline size_t br_port_info_size(v
+ nla_total_size(1) /* IFLA_BRPORT_PROXYARP */
+ nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */
+ nla_total_size(1) /* IFLA_BRPORT_VLAN_TUNNEL */
+ + nla_total_size(1) /* IFLA_BRPORT_ISOLATED */
+ nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
+ nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
+ nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */
@@ -208,7 +209,8 @@ static int br_port_fill_attrs(struct sk_
p->topology_change_ack) ||
nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
- BR_VLAN_TUNNEL)))
+ BR_VLAN_TUNNEL)) ||
+ nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)))
return -EMSGSIZE;
timerval = br_timer_value(&p->message_age_timer);
@@ -637,6 +639,7 @@ static const struct nla_policy br_port_p
[IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
[IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
[IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
+ [IFLA_BRPORT_ISOLATED] = { .type = NLA_U8 },
};
/* Change the state of the port and notify spanning tree */
@@ -773,6 +776,11 @@ static int br_setport(struct net_bridge_
return err;
}
#endif
+
+ err = br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
+ if (err)
+ return err;
+
br_port_flags_change(p, old_flags ^ p->flags);
return 0;
}
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -407,6 +407,7 @@ struct br_input_skb_cb {
#endif
bool proxyarp_replied;
+ bool src_port_isolated;
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
bool vlan_filtered;
@@ -554,6 +555,14 @@ int br_forward_finish(struct net *net, s
void br_flood(struct net_bridge *br, struct sk_buff *skb,
enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
+/* return true if both source port and dest port are isolated */
+static inline bool br_skb_isolated(const struct net_bridge_port *to,
+ const struct sk_buff *skb)
+{
+ return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
+ (to->flags & BR_ISOLATED);
+}
+
/* br_if.c */
void br_port_carrier_check(struct net_bridge_port *p);
int br_add_bridge(struct net *net, const char *name);
--- 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(isolated, BR_ISOLATED);
#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_isolated,
NULL
};
--- 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_ISOLATED BIT(16)
#define BR_DEFAULT_AGEING_TIME (300 * HZ)

7
target/linux/generic/hack-4.14/640-bridge-only-accept-EAP-locally.patch
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@ -13,7 +13,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -166,11 +166,14 @@ int br_handle_frame_finish(struct net *n
@@ -166,10 +166,14 @@ int br_handle_frame_finish(struct net *n
}
}
@ -26,7 +26,6 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
goto drop;
- BR_INPUT_SKB_CB(skb)->brdev = br->dev;
-
if (IS_ENABLED(CONFIG_INET) && skb->protocol == htons(ETH_P_ARP))
br_do_proxy_arp(skb, br, vid, p);
BR_INPUT_SKB_CB(skb)->src_port_isolated = !!(p->flags & BR_ISOLATED);
if (IS_ENABLED(CONFIG_INET) && skb->protocol == htons(ETH_P_ARP))

76
target/linux/generic/hack-4.14/641-bridge_port_isolate.patch
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@ -1,76 +0,0 @@
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 && !local_orig)
+ 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(isolated, 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_isolated,
NULL
};
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