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{ "id": 2227899, "url": "http://patchwork.ozlabs.org/api/1.1/covers/2227899/?format=api", "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=api", "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=api", "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=api", "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": "<ovs-dev-bounces@openvswitch.org>", "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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Fri, 24 Apr 2026 13:23:48 +0000 (UTC)", "from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com\n (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by\n relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3,\n cipher=TLS_AES_256_GCM_SHA384) id us-mta-178-85Mt8vzQMuSaSssV809e7Q-1; Fri,\n 24 Apr 2026 09:23:45 -0400", "from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com\n (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest\n SHA256)\n (No client certificate requested)\n by mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS\n id 1B5BD1800579\n for <dev@openvswitch.org>; Fri, 24 Apr 2026 13:23:45 +0000 (UTC)", "from amusil.redhat.com (unknown [10.44.32.61])\n by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP\n id BC3DC180047F; Fri, 24 Apr 2026 13:23:43 +0000 (UTC)" ], "X-Virus-Scanned": [ "amavis at osuosl.org", "amavis at osuosl.org" ], "X-Comment": "SPF check N/A for local connections - client-ip=140.211.9.56;\n helo=lists.linuxfoundation.org;\n envelope-from=ovs-dev-bounces@openvswitch.org; receiver=<UNKNOWN> ", "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 smtp2.osuosl.org E9F7C400E6", "OpenDKIM Filter v2.11.0 smtp2.osuosl.org 0ACCB400BA" ], "Received-SPF": "Pass (mailfrom) identity=mailfrom; client-ip=170.10.133.124;\n helo=us-smtp-delivery-124.mimecast.com; envelope-from=amusil@redhat.com;\n receiver=<UNKNOWN>", "DMARC-Filter": "OpenDMARC Filter v1.4.2 smtp2.osuosl.org 0ACCB400BA", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1777037027;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:cc:mime-version:mime-version:content-type:content-type:\n content-transfer-encoding:content-transfer-encoding;\n bh=rICXP34dzcEn8XPpt03UOQZxhopDrmVtsPlenzfOYNk=;\n b=gWP/Gyu5EduzaX7+FI9SYcaGNshPWHEkhdwpCJT39IriS3ObemhKr5Cq5Yt9oNHTFX/w6o\n kjaRx8Z63iChMfel4LbkBx4+VAPjX9TJ842FHwgPPCBH4YwBvon2mFLOlalWW5IfJi97XQ\n e7JMrlTfwg+1hSrrejzj8lCycbvqHFc=", "X-MC-Unique": "85Mt8vzQMuSaSssV809e7Q-1", "X-Mimecast-MFC-AGG-ID": "85Mt8vzQMuSaSssV809e7Q_1777037025", "To": "dev@openvswitch.org", "Date": "Fri, 24 Apr 2026 15:23:35 +0200", "Message-ID": "<20260424132342.3486635-1-amusil@redhat.com>", "MIME-Version": "1.0", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.30.177.93", "X-Mimecast-Spam-Score": "0", "X-Mimecast-MFC-PROC-ID": "ExiU0HbeWFzBTXl02a-Pg3xoQMYgUzqh6bzEZfvWUrM_1777037025", "X-Mimecast-Originator": "redhat.com", "Subject": "[ovs-dev] [PATCH ovn 0/7] This series adds support for Equal-Cost\n Multi-Path (ECMP) FDB entries", "X-BeenThere": "ovs-dev@openvswitch.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "<ovs-dev.openvswitch.org>", "List-Unsubscribe": "<https://mail.openvswitch.org/mailman/options/ovs-dev>,\n <mailto:ovs-dev-request@openvswitch.org?subject=unsubscribe>", "List-Archive": "<http://mail.openvswitch.org/pipermail/ovs-dev/>", "List-Post": "<mailto:ovs-dev@openvswitch.org>", "List-Help": "<mailto:ovs-dev-request@openvswitch.org?subject=help>", "List-Subscribe": "<https://mail.openvswitch.org/mailman/listinfo/ovs-dev>,\n <mailto:ovs-dev-request@openvswitch.org?subject=subscribe>", "From": "Ales Musil via dev <ovs-dev@openvswitch.org>", "Reply-To": "Ales Musil <amusil@redhat.com>", "Cc": "dceara@redhat.com", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Errors-To": "ovs-dev-bounces@openvswitch.org", "Sender": "\"dev\" <ovs-dev-bounces@openvswitch.org>" }, "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(-)" }