[PATCH net-next v3 0/4] ipmr/ip6mr: add Netlink notifications on cache reports

From: Julien Gomes
Date: Tue Jun 20 2017 - 16:54:37 EST

Currently, all ipmr/ip6mr cache reports are sent through the
mroute/mroute6 socket only.
This forces the use of a single socket for mroute programming, cache
reports and, regarding ipmr, IGMP messages without Router Alert option

The present patches are aiming to send Netlink notifications in addition
to the existing igmpmsg/mrt6msg to give user programs a way to handle
cache reports in parallel with multiple sockets other than the
mroute/mroute6 socket.

Changes in v2:
- Changed attributes naming from {IPMRA,IP6MRA}_CACHEREPORTA_* to
- Improved packet data copy to handle non-linear packets in
ipmr/ip6mr cache report Netlink notification creation
- Added two rtnetlink groups with restricted-binding
- Changed cache report notified groups from RTNL_{IPV4,IPV6}_MROUTE to
the new restricted groups in ipmr/ip6mr

Changes in v3:
- Put message size calculation for {igmp,mrt6}msg_netlink_event in separate
- Increased vif id attributes size from u8 to u32

Julien Gomes (4):
rtnetlink: add NEWCACHEREPORT message type
rtnetlink: add restricted rtnl groups for ipv4 and ipv6 mroute
ipmr: add netlink notifications on igmpmsg cache reports
ip6mr: add netlink notifications on mrt6msg cache reports

include/uapi/linux/mroute.h | 12 +++++++
include/uapi/linux/mroute6.h | 12 +++++++
include/uapi/linux/rtnetlink.h | 7 +++++
net/core/rtnetlink.c | 13 ++++++++
net/ipv4/ipmr.c | 69 ++++++++++++++++++++++++++++++++++++++--
net/ipv6/ip6mr.c | 71 ++++++++++++++++++++++++++++++++++++++++--
security/selinux/nlmsgtab.c | 3 +-
7 files changed, 182 insertions(+), 5 deletions(-)