bridge: mcast: add support for more router port information dumping
authorNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Fri, 26 Feb 2016 20:20:04 +0000 (21:20 +0100)
committerDavid S. Miller <davem@davemloft.net>
Tue, 1 Mar 2016 21:55:07 +0000 (16:55 -0500)
commit59f78f9f6c2e80dcf0f520be85b660f856217b79
treead2d8d083eb9dd2b5c9091f23f727ff0d70b0953
parenta55d8246abcc910346771175b521ee2bce5a69b3
bridge: mcast: add support for more router port information dumping

Allow for more multicast router port information to be dumped such as
timer and type attributes. For that that purpose we need to extend the
MDBA_ROUTER_PORT attribute similar to how it was done for the mdb entries
recently. The new format is thus:
[MDBA_ROUTER_PORT] = { <- nested attribute
    u32 ifindex <- router port ifindex for user-space compatibility
    [MDBA_ROUTER_PATTR attributes]
}
This way it remains compatible with older users (they'll simply retrieve
the u32 in the beginning) and new users can parse the remaining
attributes. It would also allow to add future extensions to the router
port without breaking compatibility.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/uapi/linux/if_bridge.h
net/bridge/br_mdb.c