[PATCH net-next] ipmr: ip6mr: Create new sockopt to clear mfc cache or vifs

[Callum Sinclair]

Created a way to clear the multicast forwarding cache on a socket
without having to either remove the entries manually using the delete
entry socket option or destroy and recreate the multicast socket.

Using the flags MRT_FLUSH_ENTRIES and MRT_FLUSH_VIFS, all multicast
entries can be cleared, all multicast interfaces can be closed or both
can be cleared using one sockopt call.

Patch Set 2:
  - Created new flags to flush static entries or vifs

Callum Sinclair (1):
  ipmr: ip6mr: Create new sockopt to clear mfc cache or vifs

 include/uapi/linux/mroute.h  |  9 ++++-
 include/uapi/linux/mroute6.h |  9 ++++-
 net/ipv4/ipmr.c              | 71 ++++++++++++++++++++-------------
 net/ipv6/ip6mr.c             | 76 +++++++++++++++++++++++-------------
 4 files changed, 108 insertions(+), 57 deletions(-)

-- 
2.20.1