diff options
Diffstat (limited to 'net/bridge/br_mdb.c')
| -rw-r--r-- | net/bridge/br_mdb.c | 67 |
1 files changed, 67 insertions, 0 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) |