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Merge branch 'bridge-mcast-tmp-router-port' 

Nikolay Aleksandrov says:

====================
bridge: mcast: add support for temp router port

This set adds support for temporary router port which doesn't depend only
on the incoming queries. It can be refreshed by setting multicast_router to
the same value (3). The first two patches are minor changes that prepare
the code for the third which adds this new type of router port.
In order to be able to dump its information the mdb router port format
is changed in patch 04 and extended similar to how mdb entries format was
done recently.
The related iproute2 changes will be posted if this is accepted.

v2: set val first and adjust router type later in patch 01, patch 03 was
split in 2
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2016-03-01 16:55:08 -05:00
parent ec1606c090 59f78f9f6c
commit 4ec620700c
3 changed files with 89 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
include/uapi/linux/if_bridge.h
View File

@ -144,7 +144,10 @@ struct bridge_vlan_info {
* }
* }
* [MDBA_ROUTER] = {
* [MDBA_ROUTER_PORT]
* [MDBA_ROUTER_PORT] = {
* u32 ifindex
* [MDBA_ROUTER_PATTR attributes]
* }
* }
*/
enum {
@ -177,6 +180,14 @@ enum {
};
#define MDBA_MDB_EATTR_MAX (__MDBA_MDB_EATTR_MAX - 1)
/* multicast router types */
enum {
MDB_RTR_TYPE_DISABLED,
MDB_RTR_TYPE_TEMP_QUERY,
MDB_RTR_TYPE_PERM,
MDB_RTR_TYPE_TEMP
};
enum {
MDBA_ROUTER_UNSPEC,
MDBA_ROUTER_PORT,
@ -184,6 +195,15 @@ enum {
};
#define MDBA_ROUTER_MAX (__MDBA_ROUTER_MAX - 1)
/* router port attributes */
enum {
MDBA_ROUTER_PATTR_UNSPEC,
MDBA_ROUTER_PATTR_TIMER,
MDBA_ROUTER_PATTR_TYPE,
__MDBA_ROUTER_PATTR_MAX
};
#define MDBA_ROUTER_PATTR_MAX (__MDBA_ROUTER_PATTR_MAX - 1)
struct br_port_msg {
__u8 family;
__u32 ifindex;

16
net/bridge/br_mdb.c
View File

@ -20,7 +20,7 @@ static int br_rports_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
{
struct net_bridge *br = netdev_priv(dev);
struct net_bridge_port *p;
struct nlattr *nest;
struct nlattr *nest, *port_nest;
if (!br->multicast_router || hlist_empty(&br->router_list))
return 0;
@ -30,8 +30,20 @@ static int br_rports_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
return -EMSGSIZE;
hlist_for_each_entry_rcu(p, &br->router_list, rlist) {
if (p && nla_put_u32(skb, MDBA_ROUTER_PORT, p->dev->ifindex))
if (!p)
continue;
port_nest = nla_nest_start(skb, MDBA_ROUTER_PORT);
if (!port_nest)
goto fail;
if (nla_put_nohdr(skb, sizeof(u32), &p->dev->ifindex) ||
nla_put_u32(skb, MDBA_ROUTER_PATTR_TIMER,
br_timer_value(&p->multicast_router_timer)) ||
nla_put_u8(skb, MDBA_ROUTER_PATTR_TYPE,
p->multicast_router)) {
nla_nest_cancel(skb, port_nest);
goto fail;
}
nla_nest_end(skb, port_nest);
}
nla_nest_end(skb, nest);

83
net/bridge/br_multicast.c
View File

@ -759,13 +759,17 @@ static void br_multicast_router_expired(unsigned long data)
struct net_bridge *br = port->br;
spin_lock(&br->multicast_lock);
if (port->multicast_router != 1 ||
if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
port->multicast_router == MDB_RTR_TYPE_PERM ||
timer_pending(&port->multicast_router_timer) ||
hlist_unhashed(&port->rlist))
goto out;
hlist_del_init_rcu(&port->rlist);
br_rtr_notify(br->dev, port, RTM_DELMDB);
/* Don't allow timer refresh if the router expired */
if (port->multicast_router == MDB_RTR_TYPE_TEMP)
port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
out:
spin_unlock(&br->multicast_lock);
@ -912,7 +916,7 @@ static void br_ip6_multicast_port_query_expired(unsigned long data)
void br_multicast_add_port(struct net_bridge_port *port)
{
port->multicast_router = 1;
port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
setup_timer(&port->multicast_router_timer, br_multicast_router_expired,
(unsigned long)port);
@ -959,7 +963,8 @@ void br_multicast_enable_port(struct net_bridge_port *port)
#if IS_ENABLED(CONFIG_IPV6)
br_multicast_enable(&port->ip6_own_query);
#endif
if (port->multicast_router == 2 && hlist_unhashed(&port->rlist))
if (port->multicast_router == MDB_RTR_TYPE_PERM &&
hlist_unhashed(&port->rlist))
br_multicast_add_router(br, port);
out:
@ -980,6 +985,9 @@ void br_multicast_disable_port(struct net_bridge_port *port)
if (!hlist_unhashed(&port->rlist)) {
hlist_del_init_rcu(&port->rlist);
br_rtr_notify(br->dev, port, RTM_DELMDB);
/* Don't allow timer refresh if disabling */
if (port->multicast_router == MDB_RTR_TYPE_TEMP)
port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
}
del_timer(&port->multicast_router_timer);
del_timer(&port->ip4_own_query.timer);
@ -1227,13 +1235,14 @@ static void br_multicast_mark_router(struct net_bridge *br,
unsigned long now = jiffies;
if (!port) {
if (br->multicast_router == 1)
if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY)
mod_timer(&br->multicast_router_timer,
now + br->multicast_querier_interval);
return;
}
if (port->multicast_router != 1)
if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
port->multicast_router == MDB_RTR_TYPE_PERM)
return;
br_multicast_add_router(br, port);
@ -1713,7 +1722,7 @@ void br_multicast_init(struct net_bridge *br)
br->hash_elasticity = 4;
br->hash_max = 512;
br->multicast_router = 1;
br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
br->multicast_querier = 0;
br->multicast_query_use_ifaddr = 0;
br->multicast_last_member_count = 2;
@ -1823,11 +1832,11 @@ int br_multicast_set_router(struct net_bridge *br, unsigned long val)
spin_lock_bh(&br->multicast_lock);
switch (val) {
case 0:
case 2:
case MDB_RTR_TYPE_DISABLED:
case MDB_RTR_TYPE_PERM:
del_timer(&br->multicast_router_timer);
/* fall through */
case 1:
case MDB_RTR_TYPE_TEMP_QUERY:
br->multicast_router = val;
err = 0;
break;
@ -1838,37 +1847,53 @@ int br_multicast_set_router(struct net_bridge *br, unsigned long val)
return err;
}
static void __del_port_router(struct net_bridge_port *p)
{
if (hlist_unhashed(&p->rlist))
return;
hlist_del_init_rcu(&p->rlist);
br_rtr_notify(p->br->dev, p, RTM_DELMDB);
}
int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
{
struct net_bridge *br = p->br;
unsigned long now = jiffies;
int err = -EINVAL;
spin_lock(&br->multicast_lock);
switch (val) {
case 0:
case 1:
case 2:
p->multicast_router = val;
if (p->multicast_router == val) {
/* Refresh the temp router port timer */
if (p->multicast_router == MDB_RTR_TYPE_TEMP)
mod_timer(&p->multicast_router_timer,
now + br->multicast_querier_interval);
err = 0;
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;
goto unlock;
}
switch (val) {
case MDB_RTR_TYPE_DISABLED:
p->multicast_router = MDB_RTR_TYPE_DISABLED;
__del_port_router(p);
del_timer(&p->multicast_router_timer);
break;
case MDB_RTR_TYPE_TEMP_QUERY:
p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
__del_port_router(p);
break;
case MDB_RTR_TYPE_PERM:
p->multicast_router = MDB_RTR_TYPE_PERM;
del_timer(&p->multicast_router_timer);
if (val == 0)
break;
br_multicast_add_router(br, p);
break;
case MDB_RTR_TYPE_TEMP:
p->multicast_router = MDB_RTR_TYPE_TEMP;
br_multicast_mark_router(br, p);
break;
default:
goto unlock;
}
err = 0;
unlock:
spin_unlock(&br->multicast_lock);
return err;