macvlan: add multicast filter

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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>

...

This commit is contained in:

Eric Dumazet 2013-02-05 20:22:50 +00:00 • committed by David S. Miller

parent 6d1ccff627

commit cd431e7385

2 changed files with 29 additions and 0 deletions

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23

drivers/net/macvlan.c

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6

include/linux/if_macvlan.h

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