cfg80211_classify8021d(9)

💖 NAME 💖

okay so lowkey welcome to the cfg80211_classify8021d(9) page, aka the Kernel API Manual entry for the function cfg80211_classify8021d. Its whole entire job is to determine the 802.1p/1d tag for a data frame — that's the one-liner, bestie, and it ate. ✨

✨ SYNOPSIS ✨

here's the signature, copy it exactly and don't freestyle it:

unsigned int cfg80211_classify8021d (struct sk_buff *skb , struct
       cfg80211_qos_map *qos_map );

🎀 ARGUMENTS 🎀

• skb — the data frame. that's the frame whose tag situation is getting sorted out. 🦋
• qos_map — Interworking QoS mapping or NULL if not in use. so if there's no mapping in play, it's literally NULL, no cap. 🙈

💅 RETURN 💅

The 802.1p/1d tag. that's the return value, periodt. 💜

👀 SEE ALSO 👀

okay bestie, sit down, hydrate, because this section is literally the entire extended cinematic universe 💅. this is the "if you liked cfg80211_classify8021d(9), you will ALSO like…" list, and it is iconic in how aggressively long it is. no cap, it's giving "the author had receipts and wanted you to see every single one of them" 🧾✨

first up, the home base — the actual source file these pages came out of:

• kernel file ./include/net/cfg80211.h — yeah, that's the header. the mothership 🛸

and then the intro-level stuff that orients you before you go feral:

• Introduction(9), Device registration(9) — the "welcome to the lore" entries, start here if you're new 🫶

🌸 the band / channel / rate era 🌸

• 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) — the whole alphabet-soup of capability structs, HT → VHT → HE → EHT → UHR, they really said "we'll never run out of letters" 😭
• 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) — note the underscore variant, bestie, _ieee80211_set_sband_iftype_data(9) is a different entry from the no-underscore one, don't come for me, that's just how it is 🙈
• wiphy_read_of_freq_limits(9)

🎀 Actions and configuration 🎀

• Actions and configuration(9) — the doorway to this whole chunk
• 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)
• the chandef girlies, absolute main characters: 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) — that's a lot of chandef, and yes, every single one is here, you're welcome 🫡
• 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)
• station-parameter central: 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)
• rate + bss info: 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)
• sar (the power-limit crew): struct cfg80211_sar_sub_specs(9), struct cfg80211_sar_specs(9), struct cfg80211_sar_freq_ranges(9), struct cfg80211_sar_capa(9), plus 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)

🦋 Scanning and BSS list handling 🦋

• Scanning and BSS list handling(9) — the group chat for scans
• 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)
• connection-flavored structs: 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)
• wowlan / coalesce lineup: 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) — yes, struct cfg80211_qos_map(9) lives here, and honestly it's the ancestor energy of this whole page, iykyk 🔥

🌈 Neighbor Awareness Networking (NAN) 🌈

• 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)

🍓 auth, pmk, pmsr & friends 🍓

• 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)

👑 the wiphy dynasty 👑

• 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) — the big one, the final boss of structs ⭐
• lifecycle crew: 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)
• the work-queue squad: 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) — queue, cancel, flush, pending, repeat, that's the whole vibe 💀
• enum ieee80211_ap_reg_power(9), struct wireless_dev(9), wdev_priv(9), wdev_chandef(9)

✨ Utility functions ✨

• 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 🧚

• 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)
• element-finding besties: 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) — elem vs ie, ext vs not, vendor vs not, the combos are giving matching set 🎀
• enum cfg80211_rnr_iter_ret(9), cfg80211_iter_rnr(9), cfg80211_defragment_element(9), cfg80211_send_layer2_update(9)

💜 Regulatory enforcement infrastructure 💜

• 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) — internal, so behave yourselves 🫣

🔥 scan done / bss info / mlme 🔥

• 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, Vendor commands, Test mode 💀

• 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)

🌸 connect, roam, notify — the notification hall of fame 🌸

• 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)

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and that's the list, bestie — every single entry, not one skipped 🌈✨ go click through them and slay 🫶

okay bestie, real talk: the SEE ALSO list on this one is long long — like the entire cfg80211 friend group pulled up to the group chat at once 💅 so here's every single one, in order, no skips, no "lol I'll just summarise", we're doing all of them:

• cfg80211_reg_check_beaconing(9)
• cfg80211_reg_can_beacon(9)
• cfg80211_reg_can_beacon_relax(9)
• cfg80211_ch_switch_notify(9)
• cfg80211_ch_switch_started_notify(9)
• ieee80211_operating_class_to_band(9)
• ieee80211_operating_class_to_chandef(9)
• ieee80211_chandef_to_operating_class(9)
• ieee80211_chandef_to_khz(9)
• cfg80211_tdls_oper_request(9)
• cfg80211_calculate_bitrate(9)
• cfg80211_unregister_wdev(9)
• cfg80211_register_netdevice(9)
• cfg80211_unregister_netdevice(9)
• struct cfg80211_ft_event_params(9)
• cfg80211_ft_event(9)
• cfg80211_get_p2p_attr(9)
• ieee80211_ie_split_ric(9)
• ieee80211_ie_split(9)
• ieee80211_fragment_element(9)
• cfg80211_report_wowlan_wakeup(9)
• cfg80211_crit_proto_stopped(9)
• ieee80211_get_num_supported_channels(9)
• cfg80211_check_combinations(9)
• cfg80211_iter_combinations(9)
• cfg80211_get_radio_idx_by_chan(9)
• cfg80211_stop_link(9)
• cfg80211_stop_iface(9)
• cfg80211_shutdown_all_interfaces(9)
• wiphy_ext_feature_set(9)
• wiphy_ext_feature_isset(9)
• cfg80211_free_nan_func(9)
• struct cfg80211_nan_match_params(9)
• cfg80211_nan_match(9)
• cfg80211_nan_func_terminated(9)
• cfg80211_nan_sched_update_done(9)
• cfg80211_external_auth_request(9)
• cfg80211_pmsr_report(9)
• cfg80211_pmsr_complete(9)
• cfg80211_iftype_allowed(9)
• cfg80211_assoc_comeback(9)
• cfg80211_update_owe_info_event(9)
• cfg80211_bss_flush(9)
• cfg80211_bss_color_notify(9)
• cfg80211_obss_color_collision_notify(9)
• cfg80211_color_change_started_notify(9)
• cfg80211_color_change_aborted_notify(9)
• cfg80211_color_change_notify(9)
• cfg80211_6ghz_power_type(9)
• cfg80211_links_removed(9)
• struct cfg80211_mlo_reconf_done_data(9)
• cfg80211_mlo_reconf_add_done(9)
• cfg80211_schedule_channels_check(9)
• cfg80211_epcs_changed(9)
• cfg80211_next_nan_dw_notif(9)
• cfg80211_nan_cluster_joined(9)
• cfg80211_nan_ulw_update(9)
• cfg80211_nan_channel_evac(9)
• wiphy_locked_debugfs_read(9)
• wiphy_locked_debugfs_write(9)
• cfg80211_s1g_get_start_freq_khz(9)
• cfg80211_s1g_get_end_freq_khz(9)
• cfg80211_s1g_get_primary_sibling(9)
• cfg80211_incumbent_signal_notify(9)

like… sixty-something cross-refs, she's thorough 🎀 go read whichever one you actually need (iykyk), they're all right there waiting for you.

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and that's the whole page, bestie, you made it to the end 🫶 this one lives over in ./include/net, it's dated October 2026, and it goes by the name cfg80211_classify8021d(9) — periodt, that's the man page 💖✨🌸