tree f84e1c2dd0c703dde5a24693e638c83bb2b043b8
parent 843bd2b38d7f3929e0fa4dd7e8061ba9da7a3961
author Ido Schimmel <idosch@mellanox.com> 1504256335 +0200
committer David S. Miller <davem@davemloft.net> 1504285296 -0700

mlxsw: spectrum_router: Trap packets hitting anycast routes

I relied on the fact that anycast routes use the loopback device as
their nexthop device to trap packets hitting them to the CPU.

After commit 4832c30d5458 ("net: ipv6: put host and anycast routes on
device with address") this is no longer the case and such routes are
programmed with a forward action (note the 'offload' flag):

anycast cafe:: dev enp3s0np7 proto kernel metric 0 offload pref medium

This will prevent the router from locally receiving packets destined to
the Subnet-Router anycast address.

Fix this by specifically programming anycast routes with action trap,
which results in the following output:

anycast cafe:: dev enp3s0np7 proto kernel metric 0 pref medium

Fixes: 4832c30d5458 ("net: ipv6: put host and anycast routes on device with address")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>