mlxsw: Add new FIB entry type for reject routes
authorAmit Cohen <amitc@mellanox.com>
Thu, 7 Nov 2019 16:42:15 +0000 (18:42 +0200)
committerDavid S. Miller <davem@davemloft.net>
Fri, 8 Nov 2019 03:51:40 +0000 (19:51 -0800)
commit21151f64a458bef8308d57cc08551e043d20ace0
treeaffebdeefcd29165b279beea3bb22805498aab86
parent3b063ae57bdfec5e574ace440e6c3f34c4115a92
mlxsw: Add new FIB entry type for reject routes

Currently, packets that cannot be routed in hardware (e.g., nexthop
device is not upper of mlxsw), are trapped to the kernel for forwarding.
Such packets are trapped using "RTR_INGRESS0" trap. This trap also traps
packets that hit reject routes (e.g., "unreachable") so that the kernel
will generate the appropriate ICMP error message for them.

Subsequent patch will need to only report to devlink packets that hit a
reject route, which is impossible as long as "RTR_INGRESS0" is
overloaded like that.

Solve this by using "RTR_INGRESS1" trap for packets that hit reject
routes.

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
drivers/net/ethernet/mellanox/mlxsw/trap.h