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net: bridge: mdb: dump host-joined entries as well

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Currently we dump only the port mdb entries but we can have host-joined
entries on the bridge itself and they should be treated as normal temp
mdbs, they're already notified:
$ bridge monitor all
[MDB]dev br0 port br0 grp ff02::8 temp

The group will not be shown in the bridge mdb output, but it takes 1 slot
and it's timing out. If it's only host-joined then the mdb show output
can even be empty.

After this patch we show the host-joined groups:
$ bridge mdb show
dev br0 port br0 grp ff02::8 temp

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov 2019-08-17 14:22:12 +03:00 committed by David S. Miller
parent 6545916ed9
commit e77b0c84e3
1 changed files with 31 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
net/bridge/br_mdb.c
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@ -78,22 +78,35 @@ static void __mdb_entry_to_br_ip(struct br_mdb_entry *entry, struct br_ip *ip)
}
static int __mdb_fill_info(struct sk_buff *skb,
struct net_bridge_mdb_entry *mp,
struct net_bridge_port_group *p)
{
struct timer_list *mtimer;
struct nlattr *nest_ent;
struct br_mdb_entry e;
u8 flags = 0;
int ifindex;
memset(&e, 0, sizeof(e));
__mdb_entry_fill_flags(&e, p->flags);
e.ifindex = p->port->dev->ifindex;
e.vid = p->addr.vid;
if (p->addr.proto == htons(ETH_P_IP))
e.addr.u.ip4 = p->addr.u.ip4;
if (p) {
ifindex = p->port->dev->ifindex;
mtimer = &p->timer;
flags = p->flags;
} else {
ifindex = mp->br->dev->ifindex;
mtimer = &mp->timer;
}
__mdb_entry_fill_flags(&e, flags);
e.ifindex = ifindex;
e.vid = mp->addr.vid;
if (mp->addr.proto == htons(ETH_P_IP))
e.addr.u.ip4 = mp->addr.u.ip4;
#if IS_ENABLED(CONFIG_IPV6)
if (p->addr.proto == htons(ETH_P_IPV6))
e.addr.u.ip6 = p->addr.u.ip6;
if (mp->addr.proto == htons(ETH_P_IPV6))
e.addr.u.ip6 = mp->addr.u.ip6;
#endif
e.addr.proto = p->addr.proto;
e.addr.proto = mp->addr.proto;
nest_ent = nla_nest_start_noflag(skb,
MDBA_MDB_ENTRY_INFO);
if (!nest_ent)
@ -102,7 +115,7 @@ static int __mdb_fill_info(struct sk_buff *skb,
if (nla_put_nohdr(skb, sizeof(e), &e) ||
nla_put_u32(skb,
MDBA_MDB_EATTR_TIMER,
br_timer_value(&p->timer))) {
br_timer_value(mtimer))) {
nla_nest_cancel(skb, nest_ent);
return -EMSGSIZE;
}
@ -139,12 +152,20 @@ static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
break;
}
if (mp->host_joined) {
err = __mdb_fill_info(skb, mp, NULL);
if (err) {
nla_nest_cancel(skb, nest2);
break;
}
}
for (pp = &mp->ports; (p = rcu_dereference(*pp)) != NULL;
pp = &p->next) {
if (!p->port)
continue;
err = __mdb_fill_info(skb, p);
err = __mdb_fill_info(skb, mp, p);
if (err) {
nla_nest_cancel(skb, nest2);
goto out;