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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , CC: Simon Horman , Ido Schimmel , "Petr Machata" , Jiri Pirko , , Zoey Mertes Subject: [PATCH net 1/2] mlxsw: spectrum: Forward packets with an IPv4 link-local source IP Date: Wed, 13 Aug 2025 13:47:08 +0200 Message-ID: <47fa24543ddcc6a7022444ca7ab8bb194fa7cdae.1755085477.git.petrm@nvidia.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: References: 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: rnnvmail201.nvidia.com (10.129.68.8) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF0000449D:EE_|MN0PR12MB6126:EE_ X-MS-Office365-Filtering-Correlation-Id: 759d70e0-c7f8-4327-e7df-08ddda5f6864 X-LD-Processed: 43083d15-7273-40c1-b7db-39efd9ccc17a,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|36860700013|82310400026|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?m5ZFcZPXWWoV8I8G4hd/nSOZmljRd4ABncyZA+ut3QjWW4vGoR0YjAJ8nNEW?= =?us-ascii?Q?Ol73Z77tYOjXG+U8vE1UMVSaJsJSuStRyBUz+a3eFRlZgfPaxBF7vhfN4Pmz?= =?us-ascii?Q?lO9BUmrk72utqznSiGoOIvrGu9uchEWD/9AB184SLYNkUKbqMOl74RoI9Nzs?= =?us-ascii?Q?BN1KYtWoOBj74ccJJibSMYf9dDmi45dvN9OOSmebZj5YcO8nwGJ7+uk1Xa5T?= =?us-ascii?Q?Nh7O1cUGpIwzTSF3lG2/4cRDFgShXAf/MavqpGbPi68jqktqPVJuEFYtkG6j?= =?us-ascii?Q?S1ohWlx4u5iWUn5MWKNbDp/0dos/8hrQHwrUrHQzWisoRf6dhzHlRXta8rSV?= =?us-ascii?Q?vlB7PaBVU+Ku1kie7N2vYlNINFu1NbHSIV50UFnI5FXQNKDEu2NUEo+B9FCS?= =?us-ascii?Q?pbIlxdjcE5WPG+qLshnLst+QIsJ9nUbOX6d5SJgNOO44/5JjkAPUB56DXRkL?= =?us-ascii?Q?HDTqWfzYrO0cC7+zuT7hXq/ssYLEvoqqDUhGEvsKV8aBICjLDxkyfHNiHy9x?= =?us-ascii?Q?ago89rJi0ZedmQoBtA//GWTs26XDnfn02J0VCzPaCvYnLdDg/NIyc3UuWJcw?= =?us-ascii?Q?7qcfF524cTaGTZn41LoMOqkSPuW2vzl7Wu0cSX7UKfXttClhcbsHAJ6o3IHB?= =?us-ascii?Q?smHhCVHblH9zrZCfGigiiCoZrKhA6H6f+dxoO0f76YA1X/1OX6lPWiAqiof4?= =?us-ascii?Q?l5RkJTAQetj/LRD6cGGB2UYt7ZDDR8kypZkmWER8Q06awQaMxcR7Eddn94AF?= =?us-ascii?Q?RopooWMOTqMFXW6WuQBgDAXcDF25WgeLNUb5P3MEFhvTy6WMT0nLfiUygsOA?= =?us-ascii?Q?w8LNTYY9HojIWNpf2e7cwb7UaOnQSV06I4ohnpZrY9vHbfNNjjRk9hjRZk06?= =?us-ascii?Q?82tWrUcJZsr3pvGFXzNmYfMjSCN8opZ8CGcuzkpuCSjn87e9utrvIeWcn2RK?= =?us-ascii?Q?fNDKe9dNtyHmpO8Bvu8aY5KZ/YleIkSJQlnFqjr/JY5qpK31iSdI/IG9y3Sd?= =?us-ascii?Q?1xAIPGlQIuMIHpS6HcUFyA8YnguE4h0fUeyKRCNN00EWLwSEhXB0N+l5V6z4?= =?us-ascii?Q?gkFIu9H4pj0uJC1NTK2ICZ8oYzCTKjLZxg/wnNp0lHPTlIUjcEQMnrygOwFD?= =?us-ascii?Q?sZSfHXO0NPBaHW6FlQHGxgXQqpJSwCtgFG8kHy1t4j9W+urGKqOcGpFHjp02?= =?us-ascii?Q?EdwGFtN3/Qj87cD3Z3ri2kDAZUz1NXXtW7ndUpw30abFfiOGQX4MXAosh4sL?= =?us-ascii?Q?Bzw46GiT5Hur0iNPodKV5Op5MMWUMIR+n4353QqXsxqLHMQ8wHQgMSqLaVb7?= =?us-ascii?Q?PdWzynZeoBTZkZtwM43lzyEqLiZqZk0/UknVrfnFolDoQMDWd0YatPYYRvUz?= =?us-ascii?Q?o8HCY9XI4f5HOveqBVt7aHvI737yNLfB7BnpgyNLvqtNjUKOVfnEer5A2fml?= =?us-ascii?Q?YK2jLW6euL2zUrwfS5uhR+pIsVDO9LzkrsKeJkD25C2enc63RVnI8w9a0Q9l?= =?us-ascii?Q?25mFH9lfEusHXhGDv34s4WOy+44ZLmE+btDj?= X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(376014)(36860700013)(82310400026)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Aug 2025 11:49:06.2805 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 759d70e0-c7f8-4327-e7df-08ddda5f6864 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF0000449D.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB6126 From: Ido Schimmel By default, the device does 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 by instructing the device to forward such packets instead of dropping them. Fixes: ca360db4b825 ("mlxsw: spectrum: Disable DIP_LINK_LOCAL check in hardware pipeline") Reported-by: Zoey Mertes Signed-off-by: Ido Schimmel Reviewed-by: Petr Machata Signed-off-by: Petr Machata --- drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 2 ++ drivers/net/ethernet/mellanox/mlxsw/trap.h | 1 + 2 files changed, 3 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c index 618957d65663..9a2d64a0a858 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c @@ -2375,6 +2375,8 @@ static const struct mlxsw_listener mlxsw_sp_listener[] = { ROUTER_EXP, false), MLXSW_SP_RXL_NO_MARK(DISCARD_ING_ROUTER_DIP_LINK_LOCAL, FORWARD, ROUTER_EXP, false), + MLXSW_SP_RXL_NO_MARK(DISCARD_ING_ROUTER_SIP_LINK_LOCAL, FORWARD, + ROUTER_EXP, false), /* Multicast Router Traps */ MLXSW_SP_RXL_MARK(ACL1, TRAP_TO_CPU, MULTICAST, false), MLXSW_SP_RXL_L3_MARK(ACL2, TRAP_TO_CPU, MULTICAST, false), diff --git a/drivers/net/ethernet/mellanox/mlxsw/trap.h b/drivers/net/ethernet/mellanox/mlxsw/trap.h index 80ee5c4825dc..9962dc157901 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/trap.h +++ b/drivers/net/ethernet/mellanox/mlxsw/trap.h @@ -94,6 +94,7 @@ enum { MLXSW_TRAP_ID_DISCARD_ING_ROUTER_IPV4_SIP_BC = 0x16A, MLXSW_TRAP_ID_DISCARD_ING_ROUTER_IPV4_DIP_LOCAL_NET = 0x16B, MLXSW_TRAP_ID_DISCARD_ING_ROUTER_DIP_LINK_LOCAL = 0x16C, + MLXSW_TRAP_ID_DISCARD_ING_ROUTER_SIP_LINK_LOCAL = 0x16D, MLXSW_TRAP_ID_DISCARD_ROUTER_IRIF_EN = 0x178, MLXSW_TRAP_ID_DISCARD_ROUTER_ERIF_EN = 0x179, MLXSW_TRAP_ID_DISCARD_ROUTER_LPM4 = 0x17B, -- 2.49.0