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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Shuah Khan , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH net-next v4 2/3] vxlan: honor per-nexthop fdb destination port Message-ID: <20260723074849.GB3189375@shredder> References: <20260723-b4-vxlan-fdb-port-v4-0-46e3a2dd88a3@gmail.com> <20260723-b4-vxlan-fdb-port-v4-2-46e3a2dd88a3@gmail.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260723-b4-vxlan-fdb-port-v4-2-46e3a2dd88a3@gmail.com> X-ClientProxiedBy: FR2P281CA0143.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:98::16) To SA3PR12MB7901.namprd12.prod.outlook.com (2603:10b6:806:306::12) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA3PR12MB7901:EE_|SJ0PR12MB8614:EE_ X-MS-Office365-Filtering-Correlation-Id: 142b5950-19e3-43b6-f2ab-08dee88edb15 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|23010399003|1800799024|366016|11063799006|4143699003|56012099006|10067099003|22082099003|18002099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?ZeW+cfBbqSekYqW5A6F6yUgBFLNSNmm5ztKzuNiJrZli8ar1X9JDCXZRUeXW?= =?us-ascii?Q?5DEGsy8ytpKOWpBCIPi4HDh8xr6WDQG/ioGx/K2vlyeZZj6C6ynXAtU1t2qX?= =?us-ascii?Q?v+NOlNrin1hPV2TrYkYSJj19cQtmWuIKpDFQzyZoN/o5OQ9G7V1BCGIZDxfu?= =?us-ascii?Q?91LH4BIsePtTritwmmONcRfGa6XmLa7UB7uTCQWuggHW/DMJpwRTp5R+N0ME?= =?us-ascii?Q?uagptGYIDMUFJy9p9rNRZ+hAfcNHNJrg+O8l5vEfUznNYvZP/I2GUbe7N2gY?= =?us-ascii?Q?s3iamvpgKcnix7U0Ga5ZraEWSwLsDCPYB944/lh6qjfIsolC2Vguj+8exd1R?= =?us-ascii?Q?+4rLW6/hnjiqB++s8vnTsjTPX1JQj7LbVUcgiK+PlLJ+mfS7XQ+t/axoCaYA?= =?us-ascii?Q?EK1c2UIySferKn+UHtGW/KQP2kd65srZ9KZeMHK6XUNvpln4opGpkgUMWwl0?= =?us-ascii?Q?QLWw6T41dR8CNxBsPG/mAg5ZLe4bfueUaxpRpVRDtDnhya8TBuiTmvRDPwmW?= =?us-ascii?Q?WamyvlGR8ygzy3EXf9S44TM81IJH2I598xflX73DeR+bue9TjK3xy8HkmmOy?= =?us-ascii?Q?+vDnmreRjMWwowRbSl6qguYA9ldKVAXVMy/41ncH6NJqgzatpXvsZ67SrisS?= =?us-ascii?Q?qfG4emMtd8rYokY4pOWh12pLMvEuTgHyPYE07brRuyw5FwxisCe12eKSMsOd?= =?us-ascii?Q?ruwCODxjP4dy9E/000kgXghRbEo78+vkBOOTWq1pQmJJr6tcYuNRDFa2AkMI?= =?us-ascii?Q?fP0z9TUM25uNEymk9q4A9UG9w0AEBNZqyy/UP0sXSR4qP9GKSAU/txvy8l5u?= =?us-ascii?Q?dCnzf8r4ztpLemfhGN0jOTUt3sFM4n9QOyUHlRtHgPaJnul0tLu1x3OkVSSw?= =?us-ascii?Q?0bNCQuAJlbqpwop5xt2+M35aCplfbXBKSCQHv3uvolugEKsNxIRTQh1Ctv86?= =?us-ascii?Q?+wR5RXegQXb10UrvJ42xtWJnwI976+nqI1o1fRc1FpYoIRjy52CA2cYPHWPm?= =?us-ascii?Q?GeGDqtyIxxxzU7nfHNn0t220dtSa8INJW93m1PjzdWQ2PcagLWngR1U0eNSM?= =?us-ascii?Q?aUwZuG8L5ODxTBKprlwwrWAG1/WAJO0XL3Y0ibMj7gJMsM4P9UdlqkeesJz/?= =?us-ascii?Q?X6Gt5jZCmvPW/NA9Re7EqtApMmolFQifF8Hp7qVKJTkU4SO4SNmCb/INamP9?= =?us-ascii?Q?i9aa7UeyIXFZxBZF9i5dBGHcyBdJeQFPiBAJZZ5WzZPYNnxnuYPntHfaqqVJ?= =?us-ascii?Q?zncb0jqpFMyPAZDIXCOaXHsZRcgG5LCE8npDDpPQnQObDUglwPkm3CPnXLhx?= =?us-ascii?Q?E34bIs8A0stzwMGbshMcji5IA2f5zv9trnvrnuKERZXcK66d5xFkjBGOVFNG?= =?us-ascii?Q?kJ3ThGwBhQxDcvzvtfRv7iyu6fC/wOx8iEZaix14fLOzNecUuw86BP0Md9vr?= =?us-ascii?Q?UrP97jyXpGBXBUT617reHit3czyXKol4+eO3xligUDBMO8UxuDYGymCMtMcO?= =?us-ascii?Q?0G6uTGzGceKFz3cjnwsTp0EUYjYNtXqHsxZc17i31iema/VrT6jXVrpEdZ5D?= =?us-ascii?Q?1mZE4GXWasPr6nf36gR/wlTu86s2fb9RbC/FcavUhFUTe8u0XHgTIMdq9hnQ?= =?us-ascii?Q?0RHgoA+46e2OjGgTQn9Z32muX223LkQa9D32B6C/H56qfWMCFktqM6AU9Oj7?= =?us-ascii?Q?6vKumOK8yvjMarhwVjpjPBMn5VXBU4SpLfQ0GJr6uc1289AGsY2uKRF306bw?= =?us-ascii?Q?Q5gs3e4c6A=3D=3D?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 142b5950-19e3-43b6-f2ab-08dee88edb15 X-MS-Exchange-CrossTenant-AuthSource: SA3PR12MB7901.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Jul 2026 07:48:59.2747 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: v3+lsVIuZVI7fuk87g4FSUH+eh8u4UPQ8aIGf4qBz0/l1WenLKSZ9U9aIagWzFHMggcExW90qqOaBJUUrrAhbQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB8614 On Thu, Jul 23, 2026 at 01:17:54AM +0000, Jack Ma wrote: > When an fdb entry points at a nexthop group, vxlan_fdb_nh_path_select() > resolves the selected leg's remote IP but leaves the UDP destination port > at the device default (vxlan->cfg.dst_port). > > Extend nexthop_path_fdb_result() to also return the selected nexthop's > NHA_DST_PORT (0 when unset) and have vxlan_fdb_nh_path_select() store it > in rdst->remote_port. vxlan_xmit_one() already prefers rdst->remote_port > when non-zero and falls back to the device port otherwise, so nexthops > without a port are unaffected. > > This lets one fdb nexthop group load-balance a flow across legs that > share an underlay IP but differ in UDP destination port. > > Signed-off-by: Jack Ma Reviewed-by: Ido Schimmel