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authorEric Dumazet <edumazet@google.com>2013-02-05 20:22:50 +0000
committerDavid S. Miller <davem@davemloft.net>2013-02-06 15:59:47 -0500
commitcd431e738509e74726055390c9e5e81e8e7e03ec (patch)
treef5efeea14ae9aa00bb18cf96dc357c73a34d6b0a /include/linux/if_macvlan.h
parent6d1ccff627806829c46091bd9d9835302a3fbf5f (diff)
downloadlinux-linaro-stable-cd431e738509e74726055390c9e5e81e8e7e03ec.tar.gz
macvlan: add multicast filter
Setting up IPv6 addresses on configurations with many macvlans is not really working, as many multicast messages are dropped. Add a multicast filter to macvlan to reduce the amount of cloned skbs and overhead. Successfully tested with 1024 macvlans on one ethernet device. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Ben Greear <greearb@candelatech.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/if_macvlan.h')
-rw-r--r--include/linux/if_macvlan.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/if_macvlan.h b/include/linux/if_macvlan.h
index f65e8d250f7e..84dde1dd1da4 100644
--- a/include/linux/if_macvlan.h
+++ b/include/linux/if_macvlan.h
@@ -52,6 +52,9 @@ struct macvlan_pcpu_stats {
*/
#define MAX_MACVTAP_QUEUES (NR_CPUS < 16 ? NR_CPUS : 16)
+#define MACVLAN_MC_FILTER_BITS 8
+#define MACVLAN_MC_FILTER_SZ (1 << MACVLAN_MC_FILTER_BITS)
+
struct macvlan_dev {
struct net_device *dev;
struct list_head list;
@@ -59,6 +62,9 @@ struct macvlan_dev {
struct macvlan_port *port;
struct net_device *lowerdev;
struct macvlan_pcpu_stats __percpu *pcpu_stats;
+
+ DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);
+
enum macvlan_mode mode;
u16 flags;
int (*receive)(struct sk_buff *skb);