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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , CC: Nikolay Aleksandrov , Ido Schimmel , , Petr Machata , Subject: [PATCH net-next 0/2] bridge: Prevent unicast ARP/NS packets from being suppressed by bridge Date: Tue, 8 Apr 2025 17:40:22 +0200 Message-ID: X-Mailer: git-send-email 2.49.0 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: BL02EPF0001A0FC:EE_|LV2PR12MB5893:EE_ X-MS-Office365-Filtering-Correlation-Id: e0e47da2-8f3c-4a9d-0d52-08dd76b40f0a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|36860700013|1800799024|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?oQos0L+xUerqS0gK+hPuHvEfeaY8WEgup0POsKh+ZFJY8n/VFLWzTnef614l?= =?us-ascii?Q?ZryPVilRXqy9FhVlaB2iPUllELPFkrIqQ4ZU1LemSo/S5EK4IsIcJZlzf0QG?= =?us-ascii?Q?aaBjeHLZ82EaUfXHjqHMvtABc9n8o4vgt/XUYhOfvfbOeAyuMpq2OgJu4dBX?= =?us-ascii?Q?i/8Bo1mMAoed9CstzwE81+F6OJKDjPWdJDxGPLG7zNe8z8QBgkO7LMcHu2ut?= =?us-ascii?Q?A4RD8E1ex7a5/9prgaSUgG/xzR/wl9x+aYqiIQdJEP5NePRVgBpkMLU05VLo?= =?us-ascii?Q?629a1V4vJx/yIw0oTXny8gbxuNTQkSJ7ade2Hw6tMLPmpvklC9jkck8WvRfg?= =?us-ascii?Q?XocZPX32knHLlyq839Oh/S5rVbyjRsq7Je39Y0A4pvOtNrmCGM0RrkYXkCgh?= =?us-ascii?Q?0hdpFqj3ucOWPd4JMUgBXivJogxDgzUjRq6qk5uZ7jR0YrsygBAXuICqQcZ9?= =?us-ascii?Q?drz4llt7mwCleXwqR3Wm3eyaurrba7zF7WHB3zkie+7KaVQCoYYZprAGpW4W?= =?us-ascii?Q?MgWg0L3kINWPQ7uWEdaoOoJ1B6snacfEFPL1GK8oo9BsAcjehiHKWrW8J8g2?= =?us-ascii?Q?wEecG0XJ6Xnkgh6iuAJxf2iXLUe+e+JIqLr/7lGUPRcXPJFfQHdyaBKg3Pcb?= =?us-ascii?Q?7KbDLuJq6RpuWX0VryrRTvaBv5J25JcoXwTxgQp7f0rR6/SLHhK/XTbNeeUY?= =?us-ascii?Q?Pj+fRm14aQTBjjJrPAXspGjbptNucLo18LdygByf3aVI0AsosaJtGq3dCxU2?= =?us-ascii?Q?yO8THeQhUwaz4Fp1dlgiyFUdWoVJeEbO2mfiyjufUEfnIjPAFAFBnQqlk8Jh?= =?us-ascii?Q?3DcsvoKuLnmYWTsg8oaGrab0qL6ZqC0E5ZmeChQG/0UrPX7+e0MnTU1njiuf?= =?us-ascii?Q?E2OTJeIO7UH+FdZREgQIjFTdzOQ62EYt1ZRKEy9Uy4MJ4MH2CvrhwD/YIllV?= =?us-ascii?Q?JZX6nvVw/iAZDLrZFIbBnFuiIA9UzXveyuWKNjhJBZdUdzGbav+xguHeE8Ac?= =?us-ascii?Q?Gnm5QZCIww/bHa4n4o686GXa+o1Qx8UshuaDw9gNp0afQ+uC89YGgM2+EOlh?= =?us-ascii?Q?53J4AUGtmhBQo3aSa8/XVOV/0dB66GdqzdgdmJ37kG1O4V7VM5cgmll4L5dZ?= =?us-ascii?Q?8DFHQDI6jLz/Wq07LmFK6NNASv/Y47WPF7idryxxzbfyWxp1xws8J027dBRv?= =?us-ascii?Q?1thc6dDp5KK5kFJdc5Ben6lfra6uQkWUC0jdHcorDDfsvNmC5Y/Jpjgs0VU3?= =?us-ascii?Q?kMH6jZRJLwActKiIVsFxhzYR4TA0jQ7HbTCtumGivIMPi3YHdJryMYgeAf8j?= =?us-ascii?Q?7rBccj0tYm1j+ayH26hfcA+r3csjw2YIHRS5kES6P7wj35BjuGSGapJnKp0P?= =?us-ascii?Q?GVRB/9Fm3SpSeDeVUFVo/M7obEKmkxhp7RH3Gu9tBi9G++mbzTN5IWvgrOye?= =?us-ascii?Q?54FGcd4hYy/bntrrUrTlNSL5tNaXLvrp/IRSqeuJzjjORbKzNS81fnw5WDEQ?= =?us-ascii?Q?Qsn73MAL5srub/7Am4w02ablKhWBQvrqkXce?= 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)(1800799024)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Apr 2025 15:43:07.3112 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e0e47da2-8f3c-4a9d-0d52-08dd76b40f0a 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: BL02EPF0001A0FC.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV2PR12MB5893 From: Amit Cohen Currently, unicast ARP requests/NS packets are replied by bridge when suppression is enabled, then they are also forwarded, which results two replicas of ARP reply/NA - one from the bridge and second from the target. The purpose of ARP/ND suppression is to reduce flooding in the broadcast domain, which is not relevant for unicast packets. In addition, the use case of unicast ARP/NS is to poll a specific host, so it does not make sense to have the switch answer on behalf of the host. Forward ARP requests/NS packets and prevent the bridge from replying to them. Patch set overview: Patch #1 prevents unicast ARP/NS packets from being suppressed by bridge Patch #2 adds test cases for unicast ARP/NS with suppression enabled Amit Cohen (2): net: bridge: Prevent unicast ARP/NS packets from being suppressed by bridge selftests: test_bridge_neigh_suppress: Test unicast ARP/NS with suppression net/bridge/br_arp_nd_proxy.c | 7 + .../net/test_bridge_neigh_suppress.sh | 125 ++++++++++++++++++ 2 files changed, 132 insertions(+) -- 2.47.0