netdev_get_by_flags_rcu(9)

💖 netdev_get_by_flags_rcu(9) — find any device with given flags 💖

okay bestie, welcome to the Kernel API Manual page for netdev_get_by_flags_rcu(9). This is the one where we go looking for any device with the flags we want. Very “main character energy” for a kernel helper, honestly. ✨

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🌸 NAME 🌸

netdev_get_by_flags_rcu — find any device with given flags

✨ SYNOPSIS ✨

struct net_device * netdev_get_by_flags_rcu (struct net *net ,
netdevice_tracker *tracker , unsigned short if_flags , unsigned short
mask );

🎀 ARGUMENTS 🎀

• net — the applicable net namespace, bestie.
• tracker — tracking object for the acquired reference. yes, we are tracking it.
• if_flags — IFF_* values.
• mask — bitmask of bits in if_flags to check.

🦋 DESCRIPTION 🦋

Search for any interface with the given flags. That’s the whole vibe: any interface that has the flags you’re checking for. simple as that, no cap. 🫶

💅 CONTEXT 💅

rcu_read_lock must be held. like, must must. do not skip this, bestie 😭

🌈 RETURN 🌈

Returns NULL if a device is not found, or a pointer to the device. so: no device, NULL; device found, pointer. iconic either way 💫

👑 SEE ALSO 👑

Kernel file ./net/core/dev.c is the main character here, and these are all the linked besties:

• 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), 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_update_features(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)

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made with ./net/core energy, dated October 2026, and brought to you by the manual page netdev_get_by_flags_rcu(9) 🫶💋