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Message-Id: <1437652853-941-1-git-send-email-nikolay@cumulusnetworks.com>
Date: Thu, 23 Jul 2015 05:00:53 -0700
From: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
To: netdev@...r.kernel.org
Cc: bridge@...ts.linux-foundation.org, davem@...emloft.net,
stephen@...workplumber.org,
Satish Ashok <sashok@...ulusnetworks.com>,
Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Subject: [PATCH net-next] bridge: mdb: notify on router port add and del
From: Satish Ashok <sashok@...ulusnetworks.com>
Send notifications on router port add and del/expire, re-use the already
existing MDBA_ROUTER and send NEWMDB/DELMDB netlink notifications
respectively.
Signed-off-by: Satish Ashok <sashok@...ulusnetworks.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
---
note: if this patch is accepted a related iproute2 patch will be sent
net/bridge/br_mdb.c | 67 +++++++++++++++++++++++++++++++++++++++++++++++
net/bridge/br_multicast.c | 10 +++++--
net/bridge/br_private.h | 2 ++
3 files changed, 77 insertions(+), 2 deletions(-)
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index 6a591e6e2d04..5e9d1c5e1194 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -247,6 +247,73 @@ void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
__br_mdb_notify(dev, &entry, type);
}
+static int nlmsg_populate_rtr_fill(struct sk_buff *skb,
+ struct net_device *dev,
+ int ifindex, u32 pid,
+ u32 seq, int type, unsigned int flags)
+{
+ struct br_port_msg *bpm;
+ struct nlmsghdr *nlh;
+ struct nlattr *nest;
+
+ nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI);
+ if (!nlh)
+ return -EMSGSIZE;
+
+ bpm = nlmsg_data(nlh);
+ memset(bpm, 0, sizeof(*bpm));
+ bpm->family = AF_BRIDGE;
+ bpm->ifindex = dev->ifindex;
+ nest = nla_nest_start(skb, MDBA_ROUTER);
+ if (!nest)
+ goto cancel;
+
+ if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex))
+ goto end;
+
+ nla_nest_end(skb, nest);
+ nlmsg_end(skb, nlh);
+ return 0;
+
+end:
+ nla_nest_end(skb, nest);
+cancel:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
+static inline size_t rtnl_rtr_nlmsg_size(void)
+{
+ return NLMSG_ALIGN(sizeof(struct br_port_msg))
+ + nla_total_size(sizeof(__u32));
+}
+
+void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
+ int type)
+{
+ struct net *net = dev_net(dev);
+ struct sk_buff *skb;
+ int err = -ENOBUFS;
+ int ifindex;
+
+ ifindex = port ? port->dev->ifindex : 0;
+ skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC);
+ if (!skb)
+ goto errout;
+
+ err = nlmsg_populate_rtr_fill(skb, dev, ifindex, 0, 0, type, NTF_SELF);
+ if (err < 0) {
+ kfree_skb(skb);
+ goto errout;
+ }
+
+ rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
+ return;
+
+errout:
+ rtnl_set_sk_err(net, RTNLGRP_MDB, err);
+}
+
static bool is_valid_mdb_entry(struct br_mdb_entry *entry)
{
if (entry->ifindex == 0)
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index ed5dc684a4ce..fd238587e032 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -766,6 +766,7 @@ static void br_multicast_router_expired(unsigned long data)
goto out;
hlist_del_init_rcu(&port->rlist);
+ br_rtr_notify(br->dev, port, RTM_DELMDB);
out:
spin_unlock(&br->multicast_lock);
@@ -977,8 +978,10 @@ void br_multicast_disable_port(struct net_bridge_port *port)
if (pg->state == MDB_TEMPORARY)
br_multicast_del_pg(br, pg);
- if (!hlist_unhashed(&port->rlist))
+ if (!hlist_unhashed(&port->rlist)) {
hlist_del_init_rcu(&port->rlist);
+ br_rtr_notify(br->dev, port, RTM_DELMDB);
+ }
del_timer(&port->multicast_router_timer);
del_timer(&port->ip4_own_query.timer);
#if IS_ENABLED(CONFIG_IPV6)
@@ -1216,6 +1219,7 @@ static void br_multicast_add_router(struct net_bridge *br,
hlist_add_behind_rcu(&port->rlist, slot);
else
hlist_add_head_rcu(&port->rlist, &br->router_list);
+ br_rtr_notify(br->dev, port, RTM_NEWMDB);
}
static void br_multicast_mark_router(struct net_bridge *br,
@@ -1848,8 +1852,10 @@ int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
p->multicast_router = val;
err = 0;
- if (val < 2 && !hlist_unhashed(&p->rlist))
+ if (val < 2 && !hlist_unhashed(&p->rlist)) {
hlist_del_init_rcu(&p->rlist);
+ br_rtr_notify(br->dev, p, RTM_DELMDB);
+ }
if (val == 1)
break;
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 3ad1290528af..e2cb359f9dd3 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -490,6 +490,8 @@ void br_mdb_init(void);
void br_mdb_uninit(void);
void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
struct br_ip *group, int type, u8 state);
+void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
+ int type);
#define mlock_dereference(X, br) \
rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
--
2.4.3
--
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