248 static void acs_clean_chan_surveys(struct hostapd_channel_data *chan)  in acs_clean_chan_surveys()  argument
252 	if (dl_list_empty(&chan->survey_list))  in acs_clean_chan_surveys()
255 	dl_list_for_each_safe(survey, tmp, &chan->survey_list,  in acs_clean_chan_surveys()
266 	struct hostapd_channel_data *chan;  in acs_cleanup()  local
269 		chan = &iface->current_mode->channels[i];  in acs_cleanup()
271 		if (chan->flag & HOSTAPD_CHAN_SURVEY_LIST_INITIALIZED)  in acs_cleanup()
272 			acs_clean_chan_surveys(chan);  in acs_cleanup()
274 		dl_list_init(&chan->survey_list);  in acs_cleanup()
275 		chan->flag |= HOSTAPD_CHAN_SURVEY_LIST_INITIALIZED;  in acs_cleanup()
276 		chan->min_nf = 0;  in acs_cleanup()
327 				    struct hostapd_channel_data *chan)  in acs_survey_chan_interference_factor()  argument
334 	if (dl_list_empty(&chan->survey_list))  in acs_survey_chan_interference_factor()
337 	if (chan->flag & HOSTAPD_CHAN_DISABLED)  in acs_survey_chan_interference_factor()
340 	chan->interference_factor = 0;  in acs_survey_chan_interference_factor()
342 	dl_list_for_each(survey, &chan->survey_list, struct freq_survey, list)  in acs_survey_chan_interference_factor()
354 		chan->interference_factor += int_factor;  in acs_survey_chan_interference_factor()
356 			   i, chan->min_nf, int_factor,  in acs_survey_chan_interference_factor()
364 	chan->interference_factor /= count;  in acs_survey_chan_interference_factor()
368 static int acs_usable_ht40_chan(struct hostapd_channel_data *chan)  in acs_usable_ht40_chan()  argument
375 		if (chan->chan == allowed[i])  in acs_usable_ht40_chan()
382 static int acs_usable_vht80_chan(struct hostapd_channel_data *chan)  in acs_usable_vht80_chan()  argument
388 		if (chan->chan == allowed[i])  in acs_usable_vht80_chan()
418 static int acs_survey_list_is_sufficient(struct hostapd_channel_data *chan)  in acs_survey_list_is_sufficient()  argument
423 	dl_list_for_each(survey, &chan->survey_list, struct freq_survey, list)  in acs_survey_list_is_sufficient()
438 			   chan->chan);  in acs_survey_list_is_sufficient()
448 	struct hostapd_channel_data *chan;  in acs_surveys_are_sufficient()  local
452 		chan = &iface->current_mode->channels[i];  in acs_surveys_are_sufficient()
453 		if (chan->flag & HOSTAPD_CHAN_DISABLED)  in acs_surveys_are_sufficient()
456 		if (!acs_survey_list_is_sufficient(chan))  in acs_surveys_are_sufficient()
467 static int acs_usable_chan(struct hostapd_channel_data *chan)  in acs_usable_chan()  argument
469 	if (dl_list_empty(&chan->survey_list))  in acs_usable_chan()
471 	if (chan->flag & HOSTAPD_CHAN_DISABLED)  in acs_usable_chan()
473 	if (!acs_survey_list_is_sufficient(chan))  in acs_usable_chan()
480 			  struct hostapd_channel_data *chan)  in is_in_chanlist()  argument
485 	return freq_range_list_includes(&iface->conf->acs_ch_list, chan->chan);  in is_in_chanlist()
493 	struct hostapd_channel_data *chan;  in acs_survey_all_chans_intereference_factor()  local
496 		chan = &iface->current_mode->channels[i];  in acs_survey_all_chans_intereference_factor()
498 		if (!acs_usable_chan(chan))  in acs_survey_all_chans_intereference_factor()
501 		if (!is_in_chanlist(iface, chan))  in acs_survey_all_chans_intereference_factor()
505 			   chan->chan, chan->freq);  in acs_survey_all_chans_intereference_factor()
507 		acs_survey_chan_interference_factor(iface, chan);  in acs_survey_all_chans_intereference_factor()
510 			   chan->interference_factor);  in acs_survey_all_chans_intereference_factor()
518 	struct hostapd_channel_data *chan;  in acs_find_chan()  local
522 		chan = &iface->current_mode->channels[i];  in acs_find_chan()
524 		if (chan->flag & HOSTAPD_CHAN_DISABLED)  in acs_find_chan()
527 		if (chan->freq == freq)  in acs_find_chan()
528 			return chan;  in acs_find_chan()
542 static int is_common_24ghz_chan(int chan)  in is_common_24ghz_chan()  argument
544 	return chan == 1 || chan == 6 || chan == 11;  in is_common_24ghz_chan()
574 	struct hostapd_channel_data *chan, *adj_chan, *ideal_chan = NULL,  in acs_find_ideal_chan()  local
608 		chan = &iface->current_mode->channels[i];  in acs_find_ideal_chan()
610 		if (chan->flag & HOSTAPD_CHAN_DISABLED)  in acs_find_ideal_chan()
613 		if (!is_in_chanlist(iface, chan))  in acs_find_ideal_chan()
621 		    !acs_usable_ht40_chan(chan)) {  in acs_find_ideal_chan()
623 				   chan->chan);  in acs_find_ideal_chan()
630 		    !acs_usable_vht80_chan(chan)) {  in acs_find_ideal_chan()
632 				   chan->chan);  in acs_find_ideal_chan()
637 		if (acs_usable_chan(chan))  in acs_find_ideal_chan()
638 			factor = chan->interference_factor;  in acs_find_ideal_chan()
642 			adj_chan = acs_find_chan(iface, chan->freq + (j * 20));  in acs_find_ideal_chan()
654 				   chan->chan);  in acs_find_ideal_chan()
662 				adj_chan = acs_find_chan(iface, chan->freq +  in acs_find_ideal_chan()
670 				adj_chan = acs_find_chan(iface, chan->freq +  in acs_find_ideal_chan()
678 				adj_chan = acs_find_chan(iface, chan->freq +  in acs_find_ideal_chan()
686 				adj_chan = acs_find_chan(iface, chan->freq +  in acs_find_ideal_chan()
702 				if (bias->channel == chan->chan)  in acs_find_ideal_chan()
707 			   is_common_24ghz_chan(chan->chan)) {  in acs_find_ideal_chan()
708 			tmp_bias.channel = chan->chan;  in acs_find_ideal_chan()
717 				   chan->chan, factor, bias->bias);  in acs_find_ideal_chan()
721 				   chan->chan, factor);  in acs_find_ideal_chan()
724 		if (acs_usable_chan(chan) &&  in acs_find_ideal_chan()
727 			ideal_chan = chan;  in acs_find_ideal_chan()
732 			rand_chan = chan;  in acs_find_ideal_chan()
737 			   ideal_chan->chan, ideal_chan->freq, ideal_factor);  in acs_find_ideal_chan()
822 	iface->conf->channel = ideal_chan->chan;  in acs_study()
881 	struct hostapd_channel_data *chan;  in acs_request_scan()  local
892 		chan = &iface->current_mode->channels[i];  in acs_request_scan()
893 		if (chan->flag & HOSTAPD_CHAN_DISABLED)  in acs_request_scan()
896 		if (!is_in_chanlist(iface, chan))  in acs_request_scan()
899 		*freq++ = chan->freq;  in acs_request_scan()