cfg80211_ch...arted_notify(9)

📦 version 7.3.1, in nixpkgs unstable

💖 cfg80211_ch_switch_started_notify(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ this one's called cfg80211_ch_switch_started_notify and honestly? iconic name, does exactly what it says on the tin. it's a function, it's in section 9, periodt. 🎀

🌸 NAME 🌸

cfg80211_ch_switch_started_notify — notify channel switch start 💅

✨ SYNOPSIS ✨

void cfg80211_ch_switch_started_notify (struct net_device *dev , struct
       cfg80211_chan_def *chandef , unsigned int link_id , u8 count , bool
       quiet );

like, look at her. five whole arguments. main character energy fr fr 🌈

🎀 ARGUMENTS 🎀

  • dev — the device on which the channel switch started, iykyk 🦋
  • chandef — the future channel definition — yes bestie, the future one, she's ahead of her time ✨
  • link_id — the link ID for MLO, and ⚠️ it must be 0 for non-MLO. no cap, that's a hard requirement, don't come crying to me 😭
  • count — the number of TBTTs until the channel switch happens ⏳ so like, how many beacons until the glow-up
  • quiet — whether or not immediate quiet was requested by the AP 🤫 the AP said shhh and this bool is the receipts

🌟 DESCRIPTION 🌟

So what does she actually do? she informs the userspace about a channel switch that has just started 🚀 and the whole point is letting userspace take appropriate actions — like, for example, starting a channel switch on other vifs — if necessary. that's the whole vibe. she's the messenger, not the manager 💖

ngl bestie, the “if necessary” is doing a lot of work there. it's situational. read the room. 🙈

okay that's part 1, more is coming so don't go anywhere 🫶

🔗 SEE ALSO 🔗

okay bestie, this is the list. every single cross-reference, and there's like a hundred of them 💀 i grouped them so you can actually find stuff instead of doom-scrolling. every name is verbatim, don't come for me.

📁 the file itself

  • ./include/net/cfg80211.h — the actual kernel file, this is the mothership 🚀

🍼 the soft intro stuff

📡 channels, rates + band capabilities (the phy core)

⚙️ actions and configuration (the big one, lowkey iconic)

🔍 scanning and BSS list handling

  • 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)
  • connecting era ✨: 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)
  • power save + offload: 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)

🐝 NAN (neighbor awareness networking, the social one)

  • 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, ranging + measurement

  • 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)

👑 wiphy + the ops (main character energy)

🧰 utility functions

🛣️ data path helpers

🌍 regulatory enforcement infrastructure

📶 scan + BSS notification callbacks

📨 MLME + assoc events

🛑 RFkill integration

🏷️ vendor commands

🧪 test mode

💌 the notification + status girlies (the rest of the alphabet, basically)

that's literally all of them, no cap. if a name's not in here it wasn't in the original either 🫶

okay so the rest of the SEE ALSO list, bestie — this is the part where the manpage just. keeps. going. and honestly? respect. every single one of these is a real page, so go tap in 💅

the regulatory girlies 🌸

operating class / chandef math 🧮✨

interfaces & registration 🎀

the FT / P2P / IE corner 🦋

combination / radio stuff 💜

NAN besties 🌈 (there are SO many, buckle up)

color change / BSS color 🎨

MLO & debugfs & S1G, the deep cuts 👑

fr fr that's the whole list — if you skipped any of these, go back, I'm literally watching 👀

and that's a wrap on the whole page, bestie 💖 this one lives under ./include/net, it's the October 2026 vintage, and it goes by cfg80211_ch...arted_notify(9) — read her, love her, cite her, periodt ✨🎀

📦 where this page comes from