bridge: mdb: notify on router port add and del
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@cumulusnetworks.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index 6a591e6..5e9d1c5 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -247,6 +247,73 @@
__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)