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bridge: allow setting hash_max + multicast_router if interface is down

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Network managers like netifd (used in OpenWRT for instance) try to
configure interface options after creation but before setting the
interface up.

Unfortunately the sysfs / bridge currently only allows to configure the
hash_max and multicast_router options when the bridge interface is up.
But since br_multicast_init() doesn't start any timers and only sets
default values and initializes timers it should be save to reconfigure
the default values after that, before things actually get active after
the bridge is set up.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Linus Lüssing 2015-05-23 03:12:34 +02:00 committed by David S. Miller
parent 485fca664d
commit 6ae4ae8e51
1 changed files with 3 additions and 21 deletions
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24
net/bridge/br_multicast.c
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@ -1772,11 +1772,9 @@ void br_multicast_stop(struct net_bridge *br)
int br_multicast_set_router(struct net_bridge *br, unsigned long val)
{
int err = -ENOENT;
int err = -EINVAL;
spin_lock_bh(&br->multicast_lock);
if (!netif_running(br->dev))
goto unlock;
switch (val) {
case 0:
@ -1787,13 +1785,8 @@ int br_multicast_set_router(struct net_bridge *br, unsigned long val)
br->multicast_router = val;
err = 0;
break;
default:
err = -EINVAL;
break;
}
unlock:
spin_unlock_bh(&br->multicast_lock);
return err;
@ -1802,11 +1795,9 @@ int br_multicast_set_router(struct net_bridge *br, unsigned long val)
int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
{
struct net_bridge *br = p->br;
int err = -ENOENT;
int err = -EINVAL;
spin_lock(&br->multicast_lock);
if (!netif_running(br->dev) || p->state == BR_STATE_DISABLED)
goto unlock;
switch (val) {
case 0:
@ -1828,13 +1819,8 @@ int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
br_multicast_add_router(br, p);
break;
default:
err = -EINVAL;
break;
}
unlock:
spin_unlock(&br->multicast_lock);
return err;
@ -1939,15 +1925,11 @@ int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val)
{
int err = -ENOENT;
int err = -EINVAL;
u32 old;
struct net_bridge_mdb_htable *mdb;
spin_lock_bh(&br->multicast_lock);
if (!netif_running(br->dev))
goto unlock;
err = -EINVAL;
if (!is_power_of_2(val))
goto unlock;