cfg80211_nan_channel_evac(9)

💅 NAME 💅

okay so like, welcome to the Kernel API Manual bestie, and today's main character is cfg80211_nan_channel_evac — and her whole job is literally notifying user space about NAN channel evacuation ✨

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✨ SYNOPSIS ✨

void cfg80211_nan_channel_evac (struct wireless_dev *wdev , const struct
cfg80211_chan_def *chandef , gfp_t gfp );

no cap, that's the whole signature 🫶

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🫶 ARGUMENTS 🫶

• wdev — pointer to the wireless_dev structure, aka the wireless device herself 💖
• chandef — pointer to the channel definition of the NAN channel that was evacuated. like, the channel that got asked to leave 🚪
• gfp — the memory allocation flags, standard king behavior 👑

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🦋 DESCRIPTION 🦋

so here's the tea 🍓 — drivers use this function to notify user space when a NAN channel has been evacuated (i.e. ULWed, yes that's the actual term, iykyk) because of channel resource conflicts with other interfaces 💀

the way this happens is: another interface sharing the channel resource with NAN needs to move to a different channel, e.g. due to a channel switch or a link switch, and NAN gets booted off the channel in the process 😭

and then user space may reconfigure the local schedule to exclude the evacuated channel 🧚 — like, she's not invited to the schedule anymore, periodt ✨

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🌸 SEE ALSO 🌸

okay so the lore runs DEEP, bestie. The kernel file ./include/net/cfg80211.h is the mothership here, and this whole section is literally the guest list of manual pages it wants you to pull up next. No skips, no vibes-only summary — every single reference is below, exactly as written. 💅

• Kernel file ./include/net/cfg80211.h — the source file that started all this, periodt.
• Introduction(9), Device registration(9), enum ieee80211_channel_flags(9), struct ieee80211_channel(9), enum ieee80211_rate_flags(9), enum ieee80211_bss_type(9), enum ieee80211_privacy(9), struct ieee80211_rate(9), struct ieee80211_he_obss_pd(9), struct cfg80211_he_bss_color(9)
• struct ieee80211_sta_ht_cap(9), struct ieee80211_sta_vht_cap(9), struct ieee80211_sta_he_cap(9), struct ieee80211_eht_mcs_nss_supp(9), struct ieee80211_sta_eht_cap(9), struct ieee80211_sta_uhr_cap(9), struct ieee80211_sband_iftype_data(9), enum ieee80211_edmg_bw_config(9), struct ieee80211_edmg(9), struct ieee80211_sta_s1g_cap(9)
• struct ieee80211_supported_band(9), _ieee80211_set_sband_iftype_data(9), ieee80211_set_sband_iftype_data(9), for_each_sband_iftype_data(9), ieee80211_get_sband_iftype_data(9), ieee80211_get_he_iftype_cap(9), ieee80211_get_he_6ghz_capa(9), ieee80211_get_eht_iftype_cap(9), ieee80211_get_uhr_iftype_cap(9), wiphy_read_of_freq_limits(9)
• Actions and configuration(9), struct vif_params(9), struct key_params(9), struct cfg80211_chan_def(9), struct cfg80211_tid_cfg(9), struct cfg80211_tid_config(9), struct cfg80211_fils_aad(9), struct cfg80211_set_hw_timestamp(9), cfg80211_get_chandef_type(9), cfg80211_chandef_create(9)
• cfg80211_chandef_identical(9), cfg80211_chandef_is_edmg(9), cfg80211_chandef_is_s1g(9), cfg80211_chandef_compatible(9), nl80211_chan_width_to_mhz(9), cfg80211_chandef_get_width(9), cfg80211_chandef_valid(9), cfg80211_chandef_usable(9), cfg80211_chandef_dfs_required(9), cfg80211_chandef_dfs_usable(9)
• cfg80211_chandef_dfs_cac_time(9), cfg80211_chandef_primary(9), cfg80211_chandef_npca_valid(9), cfg80211_chandef_add_npca(9), cfg80211_chandef_add_dbe(9), nl80211_send_chandef(9), ieee80211_chandef_max_power(9), cfg80211_chandef_s1g_pri_width(9), cfg80211_any_usable_channels(9), enum survey_info_flags(9)
• struct survey_info(9), struct cfg80211_crypto_settings(9), struct cfg80211_mbssid_config(9), struct cfg80211_mbssid_elems(9), struct cfg80211_rnr_elems(9), struct cfg80211_beacon_data(9), struct cfg80211_acl_data(9), struct cfg80211_fils_discovery(9), struct cfg80211_unsol_bcast_probe_resp(9), struct cfg80211_s1g_short_beacon(9)
• struct cfg80211_ap_settings(9), struct cfg80211_ap_update(9), struct cfg80211_csa_settings(9), struct cfg80211_color_change_settings(9), struct iface_combination_params(9), enum station_parameters_apply_mask(9), struct sta_txpwr(9), struct link_station_parameters(9), struct link_station_del_parameters(9), struct cfg80211_ttlm_params(9)
• struct station_parameters(9), struct station_del_parameters(9), enum cfg80211_station_type(9), cfg80211_check_station_change(9), enum rate_info_flags(9), enum rate_info_bw(9), struct rate_info(9), enum bss_param_flags(9), struct sta_bss_parameters(9), struct cfg80211_txq_stats(9)
• struct cfg80211_tid_stats(9), struct link_station_info(9), struct station_info(9), struct cfg80211_sar_sub_specs(9), struct cfg80211_sar_specs(9), struct cfg80211_sar_freq_ranges(9), struct cfg80211_sar_capa(9), cfg80211_get_station(9), enum monitor_flags(9), enum mpath_info_flags(9)
• struct mpath_info(9), enum wiphy_bss_param_flags(9), struct bss_parameters(9), struct mesh_config(9), struct mesh_setup(9), struct ocb_setup(9), struct ieee80211_txq_params(9)

the way this list just keeps going 😭 but we are literally not skipping one single name:

• Scanning and BSS list handling(9), struct cfg80211_ssid(9), struct cfg80211_scan_info(9), struct cfg80211_scan_6ghz_params(9), struct cfg80211_scan_request(9), struct cfg80211_match_set(9), struct cfg80211_sched_scan_plan(9), struct cfg80211_bss_select_adjust(9), struct cfg80211_sched_scan_request(9), enum cfg80211_signal_type(9)
• struct cfg80211_inform_bss(9), struct cfg80211_bss_ies(9), struct cfg80211_bss(9), ieee80211_bss_get_elem(9), ieee80211_bss_get_ie(9), struct cfg80211_auth_request(9), struct cfg80211_assoc_link(9), struct cfg80211_ml_reconf_req(9), enum cfg80211_assoc_req_flags(9), struct cfg80211_assoc_request(9)
• struct cfg80211_deauth_request(9), struct cfg80211_disassoc_request(9), struct cfg80211_ibss_params(9), struct cfg80211_bss_selection(9), struct cfg80211_connect_params(9), enum cfg80211_connect_params_changed(9), enum wiphy_params_flags(9), struct cfg80211_pmksa(9), struct cfg80211_pkt_pattern(9), struct cfg80211_wowlan_tcp(9)
• struct cfg80211_wowlan(9), struct cfg80211_coalesce_rules(9), struct cfg80211_coalesce(9), struct cfg80211_wowlan_nd_match(9), struct cfg80211_wowlan_nd_info(9), struct cfg80211_wowlan_wakeup(9), struct cfg80211_gtk_rekey_data(9), struct cfg80211_update_ft_ies_params(9), struct cfg80211_mgmt_tx_params(9), struct cfg80211_dscp_exception(9)
• struct cfg80211_dscp_range(9), struct cfg80211_qos_map(9), Neighbor Awareness Networking (NAN)(9), struct cfg80211_nan_band_config(9), struct cfg80211_nan_conf(9), struct cfg80211_nan_channel(9), struct cfg80211_nan_local_sched(9), struct cfg80211_nan_peer_map(9), struct cfg80211_nan_peer_sched(9), enum cfg80211_nan_conf_changes(9)
• struct cfg80211_nan_func_filter(9), struct cfg80211_nan_func(9), struct cfg80211_pmk_conf(9), struct cfg80211_external_auth_params(9), struct cfg80211_ftm_responder_stats(9), struct cfg80211_pmsr_ftm_result(9), struct cfg80211_pmsr_result(9), struct cfg80211_pmsr_ftm_request_peer(9), struct cfg80211_pmsr_request_peer(9), struct cfg80211_pmsr_request(9)
• struct cfg80211_update_owe_info(9), struct mgmt_frame_regs(9), struct cfg80211_ops(9), enum wiphy_flags(9), struct ieee80211_iface_limit(9), struct ieee80211_iface_combination(9), enum wiphy_wowlan_support_flags(9), struct wiphy_wowlan_support(9), struct wiphy_coalesce_support(9), enum wiphy_vendor_command_flags(9)
• enum wiphy_opmode_flag(9), struct sta_opmode_info(9), struct wiphy_vendor_command(9), struct wiphy_iftype_ext_capab(9), cfg80211_get_iftype_ext_capa(9), struct cfg80211_pmsr_capabilities(9), struct wiphy_iftype_akm_suites(9), struct wiphy_radio_cfg(9), struct wiphy_radio_freq_range(9), struct wiphy_radio(9)
• enum wiphy_nan_flags(9), struct wiphy_nan_capa(9), struct wiphy(9), wiphy_priv(9), priv_to_wiphy(9), set_wiphy_dev(9), wiphy_dev(9), wiphy_name(9), wiphy_new_nm(9), wiphy_new(9)
• wiphy_register(9), rcu_dereference_wiphy(9), wiphy_dereference(9), get_wiphy_regdom(9), wiphy_unregister(9), wiphy_free(9), wiphy_lock(9), wiphy_unlock(9), wiphy_work_queue(9), wiphy_work_cancel(9)
• wiphy_work_flush(9), wiphy_delayed_work_queue(9), wiphy_delayed_work_cancel(9), wiphy_delayed_work_flush(9), wiphy_delayed_work_pending(9), wiphy_hrtimer_work_queue(9), wiphy_hrtimer_work_cancel(9), wiphy_hrtimer_work_flush(9), wiphy_hrtimer_work_pending(9), enum ieee80211_ap_reg_power(9)
• struct wireless_dev(9), wdev_priv(9), wdev_chandef(9), Utility functions(9), ieee80211_channel_equal(9), ieee80211_channel_to_khz(9), ieee80211_channel_to_freq_khz(9), ieee80211_channel_to_frequency(9), ieee80211_freq_khz_to_channel(9), ieee80211_frequency_to_channel(9)
• ieee80211_get_channel_khz(9), ieee80211_get_channel(9), cfg80211_channel_is_psc(9), ieee80211_radio_freq_range_valid(9), cfg80211_radio_chandef_valid(9), cfg80211_wdev_channel_allowed(9), ieee80211_get_response_rate(9), ieee80211_mandatory_rates(9), struct ieee80211_radiotap_iterator(9), ieee80211_get_hdrlen_from_skb(9)
• ieee80211_hdrlen(9), ieee80211_get_mesh_hdrlen(9), Data path helpers(9), ieee80211_data_to_8023_exthdr(9), ieee80211_data_to_8023(9), ieee80211_is_valid_amsdu(9), ieee80211_amsdu_to_8023s(9), ieee80211_get_8023_tunnel_proto(9), ieee80211_strip_8023_mesh_hdr(9), cfg80211_classify8021d(9)
• cfg80211_find_elem_match(9), cfg80211_find_ie_match(9), cfg80211_find_elem(9), cfg80211_find_ie(9), cfg80211_find_ext_elem(9), cfg80211_find_ext_ie(9), cfg80211_find_vendor_elem(9), cfg80211_find_vendor_ie(9), enum cfg80211_rnr_iter_ret(9), cfg80211_iter_rnr(9)
• cfg80211_defragment_element(9), cfg80211_send_layer2_update(9), Regulatory enforcement infrastructure(9), regulatory_hint(9), regulatory_set_wiphy_regd(9), regulatory_set_wiphy_regd_sync(9), wiphy_apply_custom_regulatory(9), freq_reg_info(9), reg_initiator_name(9), regulatory_pre_cac_allowed(9)
• Internal regulatory db functions(9), reg_query_regdb_wmm(9), cfg80211_scan_done(9), cfg80211_sched_scan_results(9), cfg80211_sched_scan_stopped(9), cfg80211_sched_scan_stopped_locked(9), cfg80211_inform_bss_frame_data(9), cfg80211_gen_new_bssid(9), cfg80211_is_element_inherited(9), cfg80211_merge_profile(9)
• enum cfg80211_bss_frame_type(9), cfg80211_get_ies_channel_number(9), cfg80211_ssid_eq(9), cfg80211_inform_bss_data(9), __cfg80211_get_bss(9), cfg80211_get_bss(9), cfg80211_ref_bss(9), cfg80211_put_bss(9), cfg80211_unlink_bss(9), cfg80211_bss_iter(9)
• cfg80211_rx_mlme_mgmt(9), cfg80211_auth_timeout(9), struct cfg80211_rx_assoc_resp_data(9), cfg80211_rx_assoc_resp(9), struct cfg80211_assoc_failure(9), cfg80211_assoc_failure(9), cfg80211_tx_mlme_mgmt(9), cfg80211_rx_unprot_mlme_mgmt(9), cfg80211_michael_mic_failure(9), cfg80211_ibss_joined(9)
• cfg80211_notify_new_peer_candidate(9), RFkill integration(9), wiphy_rfkill_set_hw_state_reason(9), wiphy_rfkill_start_polling(9), wiphy_rfkill_stop_polling(9), Vendor commands(9), cfg80211_vendor_cmd_alloc_reply_skb(9), cfg80211_vendor_cmd_reply(9), cfg80211_vendor_cmd_get_sender(9), cfg80211_vendor_event_alloc(9)
• cfg80211_vendor_event_alloc_ucast(9), cfg80211_vendor_event(9), Test mode(9), cfg80211_testmode_alloc_reply_skb(9), cfg80211_testmode_reply(9), cfg80211_testmode_alloc_event_skb(9), cfg80211_testmode_event(9)

ngl the cross-reference stamina here is iconic 🔥

• struct cfg80211_fils_resp_params(9), struct cfg80211_connect_resp_params(9), cfg80211_connect_done(9), cfg80211_connect_bss(9), cfg80211_connect_result(9), cfg80211_connect_timeout(9), struct cfg80211_roam_info(9), cfg80211_roamed(9), cfg80211_port_authorized(9), cfg80211_disconnected(9)
• cfg80211_ready_on_channel(9), cfg80211_remain_on_channel_expired(9), cfg80211_tx_mgmt_expired(9), cfg80211_sinfo_alloc_tid_stats(9), cfg80211_link_sinfo_alloc_tid_stats(9), cfg80211_sinfo_release_content(9), cfg80211_new_sta(9), cfg80211_del_sta_sinfo(9), cfg80211_del_sta(9), cfg80211_conn_failed(9)
• struct cfg80211_rx_info(9), cfg80211_rx_mgmt_ext(9), cfg80211_rx_mgmt_khz(9), cfg80211_rx_mgmt(9), struct cfg80211_tx_status(9), cfg80211_mgmt_tx_status_ext(9), cfg80211_mgmt_tx_status(9), cfg80211_control_port_tx_status(9), cfg80211_rx_control_port(9), cfg80211_cqm_rssi_notify(9)
• cfg80211_cqm_pktloss_notify(9), cfg80211_cqm_txe_notify(9), cfg80211_cqm_beacon_loss_notify(9), __cfg80211_radar_event(9), cfg80211_sta_opmode_change_notify(9), cfg80211_cac_event(9), cfg80211_background_cac_abort(9), cfg80211_gtk_rekey_notify(9), cfg80211_pmksa_candidate_notify(9), cfg80211_rx_spurious_frame(9)
• cfg80211_rx_unexpected_4addr_frame(9), cfg80211_probe_status(9), cfg80211_report_obss_beacon_khz(9), cfg80211_report_obss_beacon(9), struct cfg80211_beaconing_check_config(9),

...and it literally keeps going, bestie. Here's the rest of the extended fam, every last one of them, zero skips, zero cutting corners ✨

• cfg80211_reg_check_beaconing(9) — the beaconing permission check, come get your lore 💖
• cfg80211_reg_can_beacon(9) — the "can I beacon tho?" of it all
• cfg80211_reg_can_beacon_relax(9) — same question, relaxed edition, exhale 🫶
• cfg80211_ch_switch_notify(9) — channel switch announcement: the notif
• cfg80211_ch_switch_started_notify(9) — the "we started the switch" notif, matching set 💅
• ieee80211_operating_class_to_band(9) — operating class to band, the glow-up
• ieee80211_operating_class_to_chandef(9) — operating class to chandef, same energy
• ieee80211_chandef_to_operating_class(9) — and the return trip 🔁
• ieee80211_chandef_to_khz(9) — chandef to kHz, math girlie hours 🧮
• cfg80211_tdls_oper_request(9) — TDLS oper request, say less
• cfg80211_calculate_bitrate(9) — the bitrate math, iconic, no notes 🔥
• cfg80211_unregister_wdev(9) — unregistering a wireless device, bye boo 👋
• cfg80211_register_netdevice(9) — registering a netdevice
• cfg80211_unregister_netdevice(9) — and its un-register twin, periodt
• struct cfg80211_ft_event_params(9) — the struct itself, show some respect 👑
• cfg80211_ft_event(9) — the FT event
• cfg80211_get_p2p_attr(9) — P2P attribute, got it
• ieee80211_ie_split_ric(9) — IE splitting, RIC flavour 🍓
• ieee80211_ie_split(9) — IE splitting, original recipe
• ieee80211_fragment_element(9) — fragmenting an element, breaking it down 💀
• cfg80211_report_wowlan_wakeup(9) — WoWLAN wakeup reporting, she's up
• cfg80211_crit_proto_stopped(9) — critical protocol stopped, wrap it up
• ieee80211_get_num_supported_channels(9) — counting supported channels like it's a vibe check
• cfg80211_check_combinations(9) — combinations check, the group chat mod
• cfg80211_iter_combinations(9) — iterating those combos, one by one 🦋
• cfg80211_get_radio_idx_by_chan(9) — radio index by channel, iykyk
• cfg80211_stop_link(9) — stopping a link
• cfg80211_stop_iface(9) — stopping an iface
• cfg80211_shutdown_all_interfaces(9) — all of them, down 😭
• wiphy_ext_feature_set(9) — extended feature: set
• wiphy_ext_feature_isset(9) — extended feature: is it set, bestie?
• cfg80211_free_nan_func(9) — freeing the NAN function, release her 🌸
• struct cfg80211_nan_match_params(9) — NAN match params, the struct
• cfg80211_nan_match(9) — the NAN match itself 💜
• cfg80211_nan_func_terminated(9) — terminated notification, it's giving closure
• cfg80211_nan_sched_update_done(9) — sched update done, slay
• cfg80211_external_auth_request(9) — external auth request, come through
• cfg80211_pmsr_report(9) — PMSR report
• cfg80211_pmsr_complete(9) — PMSR complete, sibling behaviour 🫶
• cfg80211_iftype_allowed(9) — "is this iftype allowed?" — the question
• cfg80211_assoc_comeback(9) — assoc comeback, she returned 🎀
• cfg80211_update_owe_info_event(9) — OWE info update event
• cfg80211_bss_flush(9) — flushing BSS info, clean slate
• cfg80211_bss_color_notify(9) — BSS color notify 🌈
• cfg80211_obss_color_collision_notify(9) — OBSS color collision notify, drama
• cfg80211_color_change_started_notify(9) — color change started
• cfg80211_color_change_aborted_notify(9) — color change aborted, we don't talk about it 🙈
• cfg80211_color_change_notify(9) — color change notify, the main event 👑
• cfg80211_6ghz_power_type(9) — 6 GHz power type, new band energy
• cfg80211_links_removed(9) — links removed, gone girl
• struct cfg80211_mlo_reconf_done_data(9) — MLO reconfig done data, the struct
• cfg80211_mlo_reconf_add_done(9) — reconfig add done, chef's kiss
• cfg80211_schedule_channels_check(9) — scheduling that channels check ⭐
• cfg80211_epcs_changed(9) — EPCS changed, noted
• cfg80211_next_nan_dw_notif(9) — next NAN DW notif
• cfg80211_nan_cluster_joined(9) — NAN cluster joined, we're in 🎉
• cfg80211_nan_ulw_update(9) — NAN ULW update
• wiphy_locked_debugfs_read(9) — locked debugfs read 🔒
• wiphy_locked_debugfs_write(9) — locked debugfs write 🔒
• cfg80211_s1g_get_start_freq_khz(9) — S1G start freq, in kHz
• cfg80211_s1g_get_end_freq_khz(9) — S1G end freq, also kHz
• cfg80211_s1g_get_primary_sibling(9) — S1G primary sibling, family matters 🫶
• cfg80211_incumbent_signal_notify(9) — incumbent signal notify, last but never least 💫

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And that's the whole page, bestie — you ate that ngl 🎀 Straight out of ./include/net, dated October 2026, and the manual you just finished is cfg80211_nan_channel_evac(9). Go be iconic with your channels 💅✨