diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/bridge/br_mdb.c | 80 | ||||
| -rw-r--r-- | net/bridge/br_multicast.c | 2 | ||||
| -rw-r--r-- | net/bridge/br_private.h | 2 |
3 files changed, 84 insertions, 0 deletions
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c index ccc43a9bff80..a8cfbf5f3c68 100644 --- a/net/bridge/br_mdb.c +++ b/net/bridge/br_mdb.c @@ -155,6 +155,86 @@ out: return skb->len; } +static int nlmsg_populate_mdb_fill(struct sk_buff *skb, + struct net_device *dev, + struct br_mdb_entry *entry, u32 pid, + u32 seq, int type, unsigned int flags) +{ + struct nlmsghdr *nlh; + struct br_port_msg *bpm; + struct nlattr *nest, *nest2; + + nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI); + if (!nlh) + return -EMSGSIZE; + + bpm = nlmsg_data(nlh); + bpm->family = AF_BRIDGE; + bpm->ifindex = dev->ifindex; + nest = nla_nest_start(skb, MDBA_MDB); + if (nest == NULL) + goto cancel; + nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY); + if (nest2 == NULL) + goto end; + + if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(*entry), entry)) + goto end; + + nla_nest_end(skb, nest2); + nla_nest_end(skb, nest); + return nlmsg_end(skb, nlh); + +end: + nla_nest_end(skb, nest); +cancel: + nlmsg_cancel(skb, nlh); + return -EMSGSIZE; +} + +static inline size_t rtnl_mdb_nlmsg_size(void) +{ + return NLMSG_ALIGN(sizeof(struct br_port_msg)) + + nla_total_size(sizeof(struct br_mdb_entry)); +} + +static void __br_mdb_notify(struct net_device *dev, struct br_mdb_entry *entry, + int type) +{ + struct net *net = dev_net(dev); + struct sk_buff *skb; + int err = -ENOBUFS; + + skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC); + if (!skb) + goto errout; + + err = nlmsg_populate_mdb_fill(skb, dev, entry, 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); +} + +void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, + struct br_ip *group, int type) +{ + struct br_mdb_entry entry; + + entry.ifindex = port->dev->ifindex; + entry.addr.proto = group->proto; + entry.addr.u.ip4 = group->u.ip4; +#if IS_ENABLED(CONFIG_IPV6) + entry.addr.u.ip6 = group->u.ip6; +#endif + __br_mdb_notify(dev, &entry, type); +} + void br_mdb_init(void) { rtnl_register(PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, NULL); diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 847b98a1d5e0..d929586ce39e 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -681,6 +681,7 @@ static int br_multicast_add_group(struct net_bridge *br, (unsigned long)p); rcu_assign_pointer(*pp, p); + br_mdb_notify(br->dev, port, group, RTM_NEWMDB); found: mod_timer(&p->timer, now + br->multicast_membership_interval); @@ -1240,6 +1241,7 @@ static void br_multicast_leave_group(struct net_bridge *br, hlist_del_init(&p->mglist); del_timer(&p->timer); call_rcu_bh(&p->rcu, br_multicast_free_pg); + br_mdb_notify(br->dev, port, group, RTM_DELMDB); if (!mp->ports && !mp->mglist && netif_running(br->dev)) diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index f95b766c7a98..2807c7680c38 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -435,6 +435,8 @@ extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val); extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); extern void br_mdb_init(void); +extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, + struct br_ip *group, int type); static inline bool br_multicast_is_router(struct net_bridge *br) { |