path: root/net/bridge/br_device.c
diff options
authorNikolay Aleksandrov <nikolay@cumulusnetworks.com>2016-06-28 16:57:06 +0200
committerDavid S. Miller <davem@davemloft.net>2016-06-30 06:18:24 -0400
commit1080ab95e3c7bdd77870e209aff83c763fdcf439 (patch)
tree16ffa738a90a36411886403ed92f5e1fef115486 /net/bridge/br_device.c
parentnet: rtnetlink: add support for the IFLA_STATS_LINK_XSTATS_SLAVE attribute (diff)
net: bridge: add support for IGMP/MLD stats and export them via netlink
This patch adds stats support for the currently used IGMP/MLD types by the bridge. The stats are per-port (plus one stat per-bridge) and per-direction (RX/TX). The stats are exported via netlink via the new linkxstats API (RTM_GETSTATS). In order to minimize the performance impact, a new option is used to enable/disable the stats - multicast_stats_enabled, similar to the recent vlan stats. Also in order to avoid multiple IGMP/MLD type lookups and checks, we make use of the current "igmp" member of the bridge private skb->cb region to record the type on Rx (both host-generated and external packets pass by multicast_rcv()). We can do that since the igmp member was used as a boolean and all the valid IGMP/MLD types are positive values. The normal bridge fast-path is not affected at all, the only affected paths are the flooding ones and since we make use of the IGMP/MLD type, we can quickly determine if the packet should be counted using cache-hot data (cb's igmp member). We add counters for: * IGMP Queries * IGMP Leaves * IGMP v1/v2/v3 reports * MLD Queries * MLD Leaves * MLD v1/v2 reports These are invaluable when monitoring or debugging complex multicast setups with bridges. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge/br_device.c')
1 files changed, 9 insertions, 1 deletions
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 2c8095a5d824..0c39e0f6da09 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -104,8 +104,16 @@ static int br_dev_init(struct net_device *dev)
return -ENOMEM;
err = br_vlan_init(br);
- if (err)
+ if (err) {
+ return err;
+ }
+ err = br_multicast_init_stats(br);
+ if (err) {
+ free_percpu(br->stats);
+ br_vlan_flush(br);
+ }
return err;