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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Jun 2025 14:17:00.6899 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4549e2e7-ee91-4135-97ef-08dda8f2a1f1 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: BN3PEPF0000B06D.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CYXPR12MB9444 Patch #1 adds a new neighbor flag ("extern_valid") that prevents the kernel from invalidating or removing a neighbor entry, while allowing the kernel to notify user space when the entry becomes reachable. See motivation and implementation details in the commit message. Patch #2 adds a selftest. Ido Schimmel (2): neighbor: Add NTF_EXT_VALIDATED flag for externally validated entries selftests: net: Add a selftest for externally validated neighbor entries Documentation/netlink/specs/rt-neigh.yaml | 1 + include/net/neighbour.h | 4 +- include/uapi/linux/neighbour.h | 5 + net/core/neighbour.c | 75 ++++- tools/testing/selftests/net/Makefile | 1 + tools/testing/selftests/net/test_neigh.sh | 337 ++++++++++++++++++++++ 6 files changed, 413 insertions(+), 10 deletions(-) create mode 100755 tools/testing/selftests/net/test_neigh.sh -- 2.49.0