From d04686d9bc86432ea3008d5f358373d8466d1943 Mon Sep 17 00:00:00 2001 From: Daniel Borkmann Date: Fri, 3 Apr 2026 01:10:19 +0200 Subject: net: Implement netdev_nl_queue_create_doit Implement netdev_nl_queue_create_doit which creates a new rx queue in a virtual netdev and then leases it to a rx queue in a physical netdev. Example with ynl client: # ynl --family netdev --output-json --do queue-create \ --json '{"ifindex": 8, "type": "rx", "lease": {"ifindex": 4, "queue": {"type": "rx", "id": 15}}}' {'id': 1} Note that the netdevice locking order is always from the virtual to the physical device. Signed-off-by: Daniel Borkmann Co-developed-by: David Wei Signed-off-by: David Wei Reviewed-by: Nikolay Aleksandrov Link: https://patch.msgid.link/20260402231031.447597-3-daniel@iogearbox.net Signed-off-by: Jakub Kicinski --- include/linux/netdevice.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index e15367373f7c..e8aa9cc4075d 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2561,7 +2561,14 @@ struct net_device { * Also protects some fields in: * struct napi_struct, struct netdev_queue, struct netdev_rx_queue * - * Ordering: take after rtnl_lock. + * Ordering: + * + * - take after rtnl_lock + * + * - for the case of netdev queue leasing, the netdev-scope lock is + * taken for both the virtual and the physical device; to prevent + * deadlocks, the virtual device's lock must always be acquired + * before the physical device's (see netdev_nl_queue_create_doit) */ struct mutex lock; -- cgit v1.2.3