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CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc7edge1.nvidia.com; CAT:NONE; SFS:(13230022)(4636009)(346002)(39860400002)(396003)(376002)(136003)(451199015)(40470700004)(46966006)(36840700001)(82310400005)(8936002)(82740400003)(26005)(2906002)(5660300002)(41300700001)(7636003)(4326008)(316002)(8676002)(70586007)(6916009)(356005)(54906003)(70206006)(40480700001)(2616005)(336012)(86362001)(40460700003)(47076005)(186003)(107886003)(36756003)(83380400001)(36860700001)(1076003)(478600001)(6666004); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Jan 2023 18:09:25.2634 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 89b556fc-5975-4e6c-f81e-08daf5914df8 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.118.232]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT057.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB7772 X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: vlad@nvidia.com, bodong@nvidia.com, feliu@nvidia.com Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" Some drivers, like mlxsw, are not interested in notifications coming in for netdevices from other network namespaces. So introduce per-netns notifiers and allow to reduce overhead by listening only for notifications from the same netns. This is done by first two patches. After we have per-net notifier, which allows to get only notifications relevant to particular network namespace. That is enough for drivers that have netdevs local in a particular namespace (cannot move elsewhere). However if netdev can change namespace, per-net notifier cannot be used. Introduce dev_net variant that is basically per-net notifier with an extension that re-registers the per-net notifier upon netdev namespace change. Basically the per-net notifier follows the netdev into namespace. This is done by the last two patches. Jiri Pirko (4): net: push loops and nb calls into helper functions net: introduce per-netns netdevice notifiers net: push code from net notifier reg/unreg into helpers net: introduce dev_net notifier register/unregister variants include/linux/netdevice.h | 23 ++++ include/net/net_namespace.h | 5 +- net/core/dev.c | 238 +++++++++++++++++++++++++++++++----- 3 files changed, 237 insertions(+), 29 deletions(-) Acked-by: Tim Gardner Acked-by: Bartlomiej Zolnierkiewicz