From eb1d16414339a6e113d89e2cca2556005d7ce919 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Sat, 27 Feb 2010 19:41:45 +0000 Subject: bridge: Add core IGMP snooping support This patch adds the core functionality of IGMP snooping support without actually hooking it up. So this patch should be a no-op as far as the bridge's external behaviour is concerned. All the new code and data is controlled by the Kconfig option BRIDGE_IGMP_SNOOPING. A run-time toggle is also available. The multicast switching is done using an hash table that is lockless on the read-side through RCU. On the write-side the new multicast_lock is used for all operations. The hash table supports dynamic growth/rehashing. The hash table will be rehashed if any chain length exceeds a preset limit. If rehashing does not reduce the maximum chain length then snooping will be disabled. These features may be added in future (in no particular order): * IGMPv3 source support * Non-querier router detection * IPv6 Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- net/bridge/Makefile | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/bridge/Makefile') diff --git a/net/bridge/Makefile b/net/bridge/Makefile index f444c12cde5a..d0359ea8ee79 100644 --- a/net/bridge/Makefile +++ b/net/bridge/Makefile @@ -12,4 +12,6 @@ bridge-$(CONFIG_SYSFS) += br_sysfs_if.o br_sysfs_br.o bridge-$(CONFIG_BRIDGE_NETFILTER) += br_netfilter.o +bridge-$(CONFIG_BRIDGE_IGMP_SNOOPING) += br_multicast.o + obj-$(CONFIG_BRIDGE_NF_EBTABLES) += netfilter/ -- cgit