{"id":2227899,"url":"http://patchwork.ozlabs.org/api/1.1/covers/2227899/?format=json","web_url":"http://patchwork.ozlabs.org/project/ovn/cover/20260424132342.3486635-1-amusil@redhat.com/","project":{"id":68,"url":"http://patchwork.ozlabs.org/api/1.1/projects/68/?format=json","name":"Open Virtual Network development","link_name":"ovn","list_id":"ovs-dev.openvswitch.org","list_email":"ovs-dev@openvswitch.org","web_url":"http://openvswitch.org/","scm_url":"","webscm_url":""},"msgid":"<20260424132342.3486635-1-amusil@redhat.com>","date":"2026-04-24T13:23:35","name":"[ovs-dev,0/7] This series adds support for Equal-Cost Multi-Path (ECMP) FDB entries","submitter":{"id":83634,"url":"http://patchwork.ozlabs.org/api/1.1/people/83634/?format=json","name":"Ales Musil","email":"amusil@redhat.com"},"mbox":"http://patchwork.ozlabs.org/project/ovn/cover/20260424132342.3486635-1-amusil@redhat.com/mbox/","series":[{"id":501360,"url":"http://patchwork.ozlabs.org/api/1.1/series/501360/?format=json","web_url":"http://patchwork.ozlabs.org/project/ovn/list/?series=501360","date":"2026-04-24T13:23:35","name":"This series adds support for Equal-Cost Multi-Path (ECMP) FDB entries","version":1,"mbox":"http://patchwork.ozlabs.org/series/501360/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/covers/2227899/comments/","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","dev@openvswitch.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","ovs-dev@lists.linuxfoundation.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=gWP/Gyu5;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=openvswitch.org\n (client-ip=2605:bc80:3010::133; 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charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"ovs-dev-bounces@openvswitch.org","Sender":"\"dev\" "},"content":"Currently, each FDB entry resolves to a single VTEP destination.\nWhen the kernel advertises FDB entries with a nexthop group ID\n(NDA_NH_ID) instead of a direct destination, OVN ignores them.\nThis series teaches the controller to parse, track, and program\nmulti-path FDB entries using OpenFlow select groups, enabling\ntraffic distribution across multiple paths with kernel-provided\nweights.\n\nThe first patch fixes a netlink notifier flush issue that is\na prerequisite for reliable nexthop tracking. Patches 2-4 add\nthe plumbing: NDA_NH_ID parsing, a nexthop exchange engine node,\nand ECMP FDB validation. Patch 5 moves the group table out of\nthe engine so physical output can share the ID space with load\nbalancer groups. Patch 6 fixes EVPN datapath data being cleared\nbetween engine runs. Finally, patch 7 generates OpenFlow select\ngroups with per-path buckets and nexthop weights.\n\nAles Musil (7):\n controller: Flush the netlink notifier message when we disable it.\n controller: Support FDB entries with nexthop ID defined.\n controller: Add nexthop exchange node.\n controller: Accept ECMP FDB entries.\n controller: Move the group_table out of the engine.\n controller: Make sure that EVPN datapaths are kept across runs.\n controller: Generate OpenFlow select groups for ECMP FDB entries.\n\n NEWS | 3 +\n controller/evpn-binding.c | 4 +-\n controller/evpn-binding.h | 1 -\n controller/evpn-fdb.c | 161 +++++++++++++++++++++++--\n controller/evpn-fdb.h | 25 +++-\n controller/neighbor-exchange-netlink.c | 21 +++-\n controller/neighbor-exchange-netlink.h | 1 +\n controller/neighbor-exchange.c | 31 ++---\n controller/neighbor-exchange.h | 5 +-\n controller/nexthop-exchange-stub.c | 20 +++\n controller/nexthop-exchange.c | 82 ++++++++++---\n controller/nexthop-exchange.h | 5 +\n controller/ovn-controller.c | 124 +++++++++++++++++--\n controller/ovn-netlink-notifier.c | 3 +-\n controller/physical.c | 80 ++++++++++--\n controller/physical.h | 3 +\n tests/ovn-inc-proc-graph-dump.at | 3 +\n tests/ovn-macros.at | 19 ++-\n tests/system-ovn-netlink.at | 121 +++++++++++++++----\n tests/system-ovn.at | 144 +++++++++++++++++++---\n tests/test-ovn-netlink.c | 10 +-\n 21 files changed, 743 insertions(+), 123 deletions(-)"}