From 74fe61f17e999a458d5f64ca2aa9a0282ca32198 Mon Sep 17 00:00:00 2001 From: Nikolay Aleksandrov Date: Fri, 10 Jul 2015 08:02:08 -0700 Subject: [PATCH] bridge: mdb: add vlan support for user entries Until now all user mdb entries were added in vlan 0, this patch adds support to allow the user to specify the vlan for the entry. About the uapi change a hole in struct br_mdb_entry is used so the size and offsets are kept the same (verified with pahole and tested with older iproute2). Example: $ bridge mdb dev br0 port eth1 grp 239.0.0.1 permanent vlan 2000 dev br0 port eth1 grp 239.0.0.1 permanent vlan 200 dev br0 port eth1 grp 239.0.0.1 permanent Signed-off-by: Nikolay Aleksandrov Signed-off-by: David S. Miller --- include/uapi/linux/if_bridge.h | 1 + net/bridge/br_mdb.c | 6 ++++++ 2 files changed, 7 insertions(+) diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h index eaaea6208b42..3635b7797508 100644 --- a/include/uapi/linux/if_bridge.h +++ b/include/uapi/linux/if_bridge.h @@ -182,6 +182,7 @@ struct br_mdb_entry { #define MDB_TEMPORARY 0 #define MDB_PERMANENT 1 __u8 state; + __u16 vid; struct { union { __be32 ip4; diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c index 1fb7d076f15c..a8d0e93d43f2 100644 --- a/net/bridge/br_mdb.c +++ b/net/bridge/br_mdb.c @@ -85,6 +85,7 @@ static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb, memset(&e, 0, sizeof(e)); e.ifindex = port->dev->ifindex; e.state = p->state; + e.vid = p->addr.vid; if (p->addr.proto == htons(ETH_P_IP)) e.addr.u.ip4 = p->addr.u.ip4; #if IS_ENABLED(CONFIG_IPV6) @@ -242,6 +243,7 @@ void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, entry.addr.u.ip6 = group->u.ip6; #endif entry.state = state; + entry.vid = group->vid; __br_mdb_notify(dev, &entry, type); } @@ -264,6 +266,8 @@ static bool is_valid_mdb_entry(struct br_mdb_entry *entry) return false; if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) return false; + if (entry->vid >= VLAN_VID_MASK) + return false; return true; } @@ -372,6 +376,7 @@ static int __br_mdb_add(struct net *net, struct net_bridge *br, if (!p || p->br != br || p->state == BR_STATE_DISABLED) return -EINVAL; + ip.vid = entry->vid; ip.proto = entry->addr.proto; if (ip.proto == htons(ETH_P_IP)) ip.u.ip4 = entry->addr.u.ip4; @@ -418,6 +423,7 @@ static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry) if (!netif_running(br->dev) || br->multicast_disabled) return -EINVAL; + ip.vid = entry->vid; ip.proto = entry->addr.proto; if (ip.proto == htons(ETH_P_IP)) { if (timer_pending(&br->ip4_other_query.timer)) -- 2.39.5