netdev_update_features(9)
π netdev_update_features(9) β from the Kernel API Manual, bestie
okay so picture this: it's netdev_update_features(9), straight out of the Kernel API Manual, and she's the friend who does a full vibe check on your network device's feature set. let's get into it β¨
β¨ NAME β¨
netdev_update_features β recalculate device features π
πΈ SYNOPSIS πΈ
void netdev_update_features (struct net_device *dev );
π ARGUMENTS π
devβ the device to check π (yes, that's the whole argument, she's low maintenance)
π¦ DESCRIPTION π¦
So what she does: she recalculates the dev->features set, and if that set has actually changed, she sends out notifications about it. π£
She's the one you call after something driver-side or hardware-side might have shifted in a way that influences the features β like, conditions changed, features might need a refresh, and you're like "bestie, handle this for me." She's the after-the-fact cleanup queen, not the init. π
π SEE ALSO π
She runs with a whole squad over in the kernel file ./net/core/dev.c, and honestly, the group chat is massive. Here's everyone:
dev_add_pack(9)__dev_remove_pack(9)dev_remove_pack(9)dev_get_iflink(9)dev_fill_metadata_dst(9)netdev_napi_by_id_lock(9)__dev_get_by_name(9)dev_get_by_name_rcu(9)netdev_get_by_name(9)__dev_get_by_index(9)dev_get_by_index_rcu(9)netdev_get_by_index(9)dev_get_by_napi_id(9)netdev_get_by_index_lock(9)netdev_get_name(9)dev_getbyhwaddr_rcu(9)dev_getbyhwaddr(9)netdev_get_by_flags_rcu(9)dev_valid_name(9)__dev_alloc_name(9)dev_alloc_name(9)dev_get_alias(9)netdev_features_change(9)__netdev_notify_peers(9)netdev_notify_peers(9)dev_disable_gro_hw(9)register_netdevice_notifier(9)unregister_netdevice_notifier(9)register_netdevice_notifier_net(9)unregister_netdevice_notifier_net(9)call_netdevice_notifiers_info(9)call_netdevice_notifiers_info_robust(9)call_netdevice_notifiers(9)call_netdevice_notifiers_mtu(9)dev_forward_skb(9)dev_nit_active_rcu(9)netif_setup_tc(9)netif_set_real_num_rx_queues(9)netif_set_real_num_queues(9)netif_set_tso_max_size(9)netif_set_tso_max_segs(9)netif_inherit_tso_max(9)netif_get_num_default_rss_queues(9)netif_device_detach(9)netif_device_attach(9)dev_loopback_xmit(9)__dev_queue_xmit(9)rps_flow_is_active(9)rps_may_expire_flow(9)__netif_rx(9)netif_rx(9)netdev_is_rx_handler_busy(9)netdev_rx_handler_register(9)netdev_rx_handler_unregister(9)netif_receive_skb_core(9)netif_receive_skb(9)netif_receive_skb_list(9)__napi_schedule(9)napi_schedule_prep(9)__napi_schedule_irqoff(9)netif_threaded_enable(9)netif_queue_set_napi(9)napi_disable(9)napi_enable(9)netdev_has_upper_dev(9)netdev_has_upper_dev_all_rcu(9)netdev_has_any_upper_dev(9)netdev_master_upper_dev_get(9)netdev_has_any_lower_dev(9)netdev_upper_get_next_dev_rcu(9)netdev_lower_get_next_private(9)netdev_lower_get_next_private_rcu(9)netdev_lower_get_next(9)netdev_lower_get_first_private_rcu(9)netdev_master_upper_dev_get_rcu(9)netdev_upper_dev_link(9)netdev_master_upper_dev_link(9)netdev_upper_dev_unlink(9)netdev_bonding_info_change(9)netdev_get_xmit_slave(9)netdev_sk_get_lowest_dev(9)netdev_lower_state_changed(9)netif_get_flags(9)netif_set_mtu_ext(9)netif_pre_changeaddr_notify(9)dev_get_phys_port_id(9)dev_get_phys_port_name(9)netif_get_port_parent_id(9)netdev_port_same_parent_id(9)netdev_change_proto_down_reason_locked(9)dev_change_xdp_fd(9)dev_index_reserve(9)netdev_change_features(9)netif_stacked_transfer_operstate(9)register_netdevice(9)register_netdev(9)netdev_wait_allrefs_any(9)dev_get_stats(9)dev_fetch_sw_netstats(9)dev_get_tstats64(9)netdev_sw_irq_coalesce_default_on(9)alloc_netdev_mqs(9)free_netdev(9)alloc_netdev_dummy(9)synchronize_net(9)unregister_netdevice_queue(9)unregister_netdevice_many(9)unregister_netdev(9)netdev_increment_features(9)netdev_compute_master_upper_features(9)netdev_drivername(9)
like I said. huge squad. iykyk π
okay that's the whole page, no cap π«Ά this one came from ./net/core and it's dated October 2026 β so yeah, she's recent, she's iconic, and she's absolutely the main character of your feature-recalc pipeline. periodt π
π¦ where this page comes from
- nixpkgs unstable: linux-manual 7.3.1
- π girlified by deepseek-ai/DeepSeek-V4.1-Flash-1017 on : a language model's rewrite of the original, under its terms