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bridge: mcast: use names for the different multicast_router types

Browse Source 
Using raw values makes it difficult to extend and also understand the
code, give them names and do explicit per-option manipulation in
br_multicast_set_port_router.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov 2016-02-26 21:20:01 +01:00 committed by David S. Miller
parent ec1606c090
commit 7f0aec7a66
2 changed files with 40 additions and 28 deletions
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7
include/uapi/linux/if_bridge.h
View File

@ -177,6 +177,13 @@ 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,
};
enum {
MDBA_ROUTER_UNSPEC,
MDBA_ROUTER_PORT,

61
net/bridge/br_multicast.c
View File

@ -759,7 +759,7 @@ 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_TEMP_QUERY ||
timer_pending(&port->multicast_router_timer) ||
hlist_unhashed(&port->rlist))
goto out;
@ -912,7 +912,7 @@ 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 +959,8 @@ 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:
@ -1227,13 +1228,13 @@ 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_TEMP_QUERY)
return;
br_multicast_add_router(br, port);
@ -1713,7 +1714,7 @@ 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 +1824,11 @@ 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;
@ -1838,6 +1839,14 @@ 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;
@ -1846,29 +1855,25 @@ int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
spin_lock(&br->multicast_lock);
switch (val) {
case 0:
case 1:
case 2:
p->multicast_router = val;
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;
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;
default:
goto unlock;
}
err = 0;
unlock:
spin_unlock(&br->multicast_lock);
return err;