From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jiri Pirko Subject: [patch net-next 00/15] mlxsw: Reflect nexthop status changes Date: Wed, 8 Feb 2017 11:16:27 +0100 Message-ID: <1486549002-2056-1-git-send-email-jiri@resnulli.us> Cc: davem@davemloft.net, idosch@mellanox.com, eladr@mellanox.com, mlxsw@mellanox.com To: netdev@vger.kernel.org Return-path: Received: from mail-wm0-f68.google.com ([74.125.82.68]:35168 "EHLO mail-wm0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752511AbdBHKQp (ORCPT ); Wed, 8 Feb 2017 05:16:45 -0500 Received: by mail-wm0-f68.google.com with SMTP id u63so32403644wmu.2 for ; Wed, 08 Feb 2017 02:16:44 -0800 (PST) Sender: netdev-owner@vger.kernel.org List-ID: From: Jiri Pirko Ido says: When the kernel forwards IPv4 packets via multipath routes it doesn't consider nexthops that are dead or linkdown. For example, if the nexthop netdev is administratively down or doesn't have a carrier. Devices capable of offloading such multipath routes need to be made aware of changes in the reflected nexthops' status. Otherwise, the device might forward packets via non-functional nexthops, resulting in packet loss. This patchset aims to fix that. The first 11 patches deal with the necessary restructuring in the mlxsw driver, so that it's able to correctly add and remove nexthops from the device's adjacency table. The 12th patch adds the NH_{ADD,DEL} events to the FIB notification chain. These notifications are sent whenever the kernel decides to add or remove a nexthop from the forwarding plane. Finally, the last three patches add support for these events in the mlxsw driver, which is currently the only driver capable of offloading multipath routes. Ido Schimmel (15): mlxsw: spectrum_router: Nullify nexthop's neigh pointer mlxsw: spectrum_router: Store nexthop groups in a hash table mlxsw: spectrum_router: Store nexthops in a hash table mlxsw: spectrum_router: Use nexthop's scope to set action type mlxsw: spectrum_router: Add gateway indication to nexthop group mlxsw: spectrum_router: Store routes in a more generic way mlxsw: spectrum_router: Remove FIB info from FIB entry struct mlxsw: spectrum_router: Refactor nexthop init routine mlxsw: spectrum_router: More accurately set offload flag mlxsw: spectrum_router: Determine offload status using generic function mlxsw: spectrum_router: Use trap action only for some route types ipv4: fib: Notify about nexthop status changes mlxsw: spectrum_router: Reflect nexthop status changes mlxsw: spectrum_router: Don't reflect LINKDOWN nexthops mlxsw: spectrum_router: Flush resources when RIF is deleted drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 6 + drivers/net/ethernet/mellanox/mlxsw/spectrum.h | 7 +- .../net/ethernet/mellanox/mlxsw/spectrum_router.c | 534 ++++++++++++++++----- include/net/ip_fib.h | 7 + net/ipv4/fib_semantics.c | 33 ++ 5 files changed, 457 insertions(+), 130 deletions(-) -- 2.7.4