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bridge: mcast: add MLDv2 querier support

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This patch adds basic support for MLDv2 queries, the default is MLDv1
as before. A new multicast option - multicast_mld_version, adds the
ability to change it between 1 and 2 via netlink and sysfs.
The MLD option is disabled if CONFIG_IPV6 is disabled.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov
2016-11-21 13:03:25 +01:00
committed by David S. Miller
parent 5e9235853d
commit aa2ae3e71c
5 changed files with 113 additions and 22 deletions
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22
net/bridge/br_sysfs_br.c
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@@ -659,6 +659,25 @@ static ssize_t multicast_stats_enabled_store(struct device *d,
return store_bridge_parm(d, buf, len, set_stats_enabled);
}
static DEVICE_ATTR_RW(multicast_stats_enabled);
#if IS_ENABLED(CONFIG_IPV6)
static ssize_t multicast_mld_version_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%u\n", br->multicast_mld_version);
}
static ssize_t multicast_mld_version_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, br_multicast_set_mld_version);
}
static DEVICE_ATTR_RW(multicast_mld_version);
#endif
#endif
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
static ssize_t nf_call_iptables_show(
@@ -827,6 +846,9 @@ static struct attribute *bridge_attrs[] = {
&dev_attr_multicast_startup_query_interval.attr,
&dev_attr_multicast_stats_enabled.attr,
&dev_attr_multicast_igmp_version.attr,
#if IS_ENABLED(CONFIG_IPV6)
&dev_attr_multicast_mld_version.attr,
#endif
#endif
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
&dev_attr_nf_call_iptables.attr,