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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , CC: Simon Horman , Ido Schimmel , "Petr Machata" , Jiri Pirko , Subject: [PATCH net v2 0/2] mlxsw: spectrum: Forward packets with an IPv4 link-local source IP Date: Thu, 14 Aug 2025 15:06:39 +0200 Message-ID: X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: rnnvmail202.nvidia.com (10.129.68.7) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF0001AB52:EE_|DS0PR12MB7969:EE_ X-MS-Office365-Filtering-Correlation-Id: bf2ee5dd-f7e8-4130-bd80-08dddb33a53c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700013|376014|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?dw+6tt7zwiyXeC8ShxfGKEreucxAFOMkno4VkzXYqmLT8oFpnnOPG3FbKSfa?= =?us-ascii?Q?54ObKCmgGxEjfaD3/qoyoGJU78bVudwBRjTkZJ+BLTYolHHOglgutFTsXSEk?= =?us-ascii?Q?Q5eYCitx73nUvfxlEIBZu2s76t9DE9L2SDt/SVdqGEG5U/TYnwRaHA9i3cDo?= =?us-ascii?Q?XyuOXcpeRzxhTEAhvVqMjBPYb10YTgr/biFnB9IUyYcThCQ2fOBxFtNX/wlu?= =?us-ascii?Q?Vl78mp+xdLDfl6lT25Zq1u6rfFPOZxTrfjks4kT4Y5jFrcKogfjA/nQUdk+w?= =?us-ascii?Q?re8YaHu97pLDyN/8UCPkx5rVy9KRN0veip00bMv2/uAvhNYqzhMGA3bM0rBy?= =?us-ascii?Q?tC0AuyiSONjE3dQ+Hi41mnwPQ3m9ckp02x97p6LOdSew6MyNwlj2CJeQ1VZv?= =?us-ascii?Q?LiIkmD8HCPxZO6BmjiEWXFIHHjbK1JNOYW/VQSwSjF4xBZK9tfZxIzF4Kraz?= =?us-ascii?Q?ZoApz7a5OSEA0pkPXaBg7s7prLGJB5KM/QGogEklV/CVq7I87MeQni5kw4Rr?= =?us-ascii?Q?VsF6/CgxBS7WmiApVt41gShZpNSMZtNJgQstL0kBffAsoEevj6frVdIIeGPL?= =?us-ascii?Q?raVjxvx6v72b5MuEW4gvRBP2Qbmz0BJUDkNOWKcMl587feZ8o+78M7fzCAiV?= =?us-ascii?Q?61bZ5CqNFcKm4rstTXXYyxTxxvedeP/kRz5AUFAFAhNPlxdTuOM/YrhaGfWc?= =?us-ascii?Q?JDhF/rUrOpRnxZb9b/MScaoy1G60PvgvtZtipLnquMaBh/lSNpKGm4ieq05N?= =?us-ascii?Q?fa9XtB4YocIDV+ozzBftyWrY106a1k8VDooyDUMbAOgDikBQb2AbKiAVtg85?= =?us-ascii?Q?jokkCFalLeq1IpTvBi7Espn09FfXInLpyalJn2Or1yRSRfWLBayKHf2c5zH0?= =?us-ascii?Q?+FL5d7BmCrfmWLRrySnJJBK+xFBoElJp/S5i+kmV3vH1nni6j/0TeGes5yiD?= =?us-ascii?Q?uC5ZjL9eRugUuWwgWhbKQjmKDILO9cbKy8vXvFE2g5zHI9k5PZfUQKREa/Ma?= =?us-ascii?Q?2c5GsZXAF5aNbGC5B3NEmdkNEuLK3HLT4pHNXESqH/WtUu0WlTFdTIT/Y1q2?= =?us-ascii?Q?g+7iYhJ+R9Xn9JbPdMdjnvnhkfTP0gaYg12sO+Yb+ghHqphA+XGJ00jUiGyQ?= =?us-ascii?Q?HC0Uv1TzBJ2kTuU80CHRMLCepKaIuEVwsmUYAZ/3slS4flOT405rsgncEMxm?= =?us-ascii?Q?WCoMyaIVSFEavmtGPkhDFu212kKNQe1Ppr6ivy/8IvEZ0axRBUcalFbk3cQO?= =?us-ascii?Q?4Oifb/6ODbM07lqhifQHrzYDB6j6LOXbk+VyHDKYrpqENBBX039oOpVpaFsW?= =?us-ascii?Q?fzbPQSB6Mf3INTUaH31dcn0TU52LI9ET7P/Tdup9bXeTl8a5a1vylA5YeeoU?= =?us-ascii?Q?SMHD1OoaQQThxo6xj/4W+0WpsulQvDAHiEevoBbSMitAn+usRdgrD+xUfnu5?= =?us-ascii?Q?ig+SMDTQONZgz3OEWBNDKTbeT0ftUAItO2itHktYokv+rhNnGgfzAkffVWAv?= =?us-ascii?Q?IaZW9OBSPCp4CHJQUk/Gu0Mt8guDeJSE2kuI?= X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(82310400026)(36860700013)(376014)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Aug 2025 13:08:21.6695 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: bf2ee5dd-f7e8-4130-bd80-08dddb33a53c X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF0001AB52.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB7969 By default, Spectrum devices do not forward IPv4 packets with a link-local source IP (i.e., 169.254.0.0/16). This behavior does not align with the kernel which does forward them. Fix the issue and add a selftest. v2: - Patch #2: disable rp_filter to prevent packets from getting dropped on ingress. Ido Schimmel (2): mlxsw: spectrum: Forward packets with an IPv4 link-local source IP selftest: forwarding: router: Add a test case for IPv4 link-local source IP .../net/ethernet/mellanox/mlxsw/spectrum.c | 2 ++ drivers/net/ethernet/mellanox/mlxsw/trap.h | 1 + .../selftests/net/forwarding/router.sh | 29 +++++++++++++++++++ 3 files changed, 32 insertions(+) -- 2.49.0