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bridge: mcast: add IGMPv3 query support

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This patch adds basic support for IGMPv3 queries, the default is IGMPv2
as before. A new multicast option - multicast_igmp_version, adds the
ability to change it between 2 and 3 via netlink and sysfs. The option
struct member is in a 4 byte hole in net_bridge.

There also a few minor style adjustments in br_multicast_new_group and
br_multicast_add_group.

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 13:03:24 +01:00
committed by David S. Miller
parent fc51f2b7e5
commit 5e9235853d
5 changed files with 98 additions and 18 deletions
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18
net/bridge/br_sysfs_br.c
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@@ -440,6 +440,23 @@ static ssize_t hash_max_store(struct device *d, struct device_attribute *attr,
}
static DEVICE_ATTR_RW(hash_max);
static ssize_t multicast_igmp_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_igmp_version);
}
static ssize_t multicast_igmp_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_igmp_version);
}
static DEVICE_ATTR_RW(multicast_igmp_version);
static ssize_t multicast_last_member_count_show(struct device *d,
struct device_attribute *attr,
char *buf)
@@ -809,6 +826,7 @@ static struct attribute *bridge_attrs[] = {
&dev_attr_multicast_query_response_interval.attr,
&dev_attr_multicast_startup_query_interval.attr,
&dev_attr_multicast_stats_enabled.attr,
&dev_attr_multicast_igmp_version.attr,
#endif
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
&dev_attr_nf_call_iptables.attr,