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(fw.cumulusnetworks.com. [216.129.126.126]) by smtp.googlemail.com with ESMTPSA id ie17sm21213pjb.19.2020.05.04.15.28.26 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 04 May 2020 15:28:27 -0700 (PDT) From: Roopa Prabhu X-Google-Original-From: Roopa Prabhu To: dsahern@gmail.com, davem@davemloft.net Cc: netdev@vger.kernel.org, nikolay@cumulusnetworks.com, idosch@mellanox.com, jiri@mellanox.com, petrm@mellanox.com Subject: [RFC PATCH net-next 0/5] Support for fdb ECMP nexthop groups Date: Mon, 4 May 2020 15:28:16 -0700 Message-Id: <1588631301-21564-1-git-send-email-roopa@cumulusnetworks.com> X-Mailer: git-send-email 2.1.4 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Roopa Prabhu This series introduces ecmp nexthops and nexthop groups for mac fdb entries. In subsequent patches this is used by the vxlan driver fdb entries. The use case is E-VPN multihoming [1,2,3] which requires bridged vxlan traffic to be load balanced to remote switches (vteps) belonging to the same multi-homed ethernet segment (This is analogous to a multi-homed LAG but over vxlan). Changes include new nexthop flag NHA_FDB for nexthops referenced by fdb entries. These nexthops only have ip. The patches make sure that routes dont reference such nexthops. example: $ip nexthop add id 12 via 172.16.1.2 fdb $ip nexthop add id 13 via 172.16.1.3 fdb $ip nexthop add id 102 group 12/13 fdb $bridge fdb add 02:02:00:00:00:13 dev vxlan1000 nhid 101 self [1] E-VPN https://tools.ietf.org/html/rfc7432 [2] E-VPN VxLAN: https://tools.ietf.org/html/rfc8365 [3] LPC talk with mention of nexthop groups for L2 ecmp http://vger.kernel.org/lpc_net2018_talks/scaling_bridge_fdb_database_slidesV3.pdf Roopa Prabhu (5): nexthop: support for fdb ecmp nexthops vxlan: ecmp support for mac fdb entries nexthop: add support for notifiers vxlan: support for nexthop notifiers selftests: net: add fdb nexthop tests drivers/net/vxlan.c | 319 ++++++++++++++++++++++------ include/net/netns/nexthop.h | 1 + include/net/nexthop.h | 26 +++ include/uapi/linux/neighbour.h | 1 + include/uapi/linux/nexthop.h | 1 + net/ipv4/nexthop.c | 127 +++++++++-- tools/testing/selftests/net/fib_nexthops.sh | 77 ++++++- 7 files changed, 464 insertions(+), 88 deletions(-)