call_netdevi..._info_robust(9)

💅 call_netdevice_notifiers_info_robust — the kernel API manual, bestie edition

okay so this page is from the Kernel API Manual, section 9 (that's the kernel-functions girlies), and the star of the show is call_netdevice_notifiers_info_robust(9). yes the title is long. no we're not abbreviating it. she earned that name. 🎀

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✨ NAME ✨

call_netdevice_notifiers_info_robust — call per-netns notifier blocks for and rollback on error

like, she calls the notifier blocks and she cleans up if things go sideways. a responsible icon. 💅

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🌸 SYNOPSIS 🌸

int call_netdevice_notifiers_info_robust (unsigned long val_up ,
       unsigned long val_down , struct netdev_notifier_info *info );

three args, one int coming back at you. that's the whole vibe check. ✨

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🦋 ARGUMENTS 🦋

• val_up — the value that gets passed unmodified to the notifier function. no notes, no edits, straight through. 🫶
• val_down — also passed unmodified to the notifier function, but this one's the recovery girly: she shows up when we're recovering from an error on val_up. 😭
• info — the notifier information data. the little info packet. the lore. 🎀

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🔥 DESCRIPTION 🔥

so what she does is call all per-netns network notifier blocks — but not the notifier blocks on the global notifier chain. read that again, because that's the whole personality: per-netns only, global chain stays unbothered. 💀

parameters and return value? literally exactly as for raw_notifier_call_chain_robust. same energy, no cap.

⚠️ important vibe check: she does not touch notifier blocks on the global notifier chain. if you were expecting global, you're at the wrong function, bestie. 🙈

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👑 SEE ALSO 👑

found in the kernel file ./net/core/dev.c 🧚 — and here's the whole friend group, no gatekeeping:

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(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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okay that's the whole page!! 🎀 source is ./net/core, dated October 2026 — mwah, she's timeless. go call your notifiers, bestie, and remember: per-netns only, global chain stays in its lane. periodt. 💖🦋✨