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mac80211: make check_combinations() aware of chanctx reservation

Browse source 
The ieee80211_check_combinations() computes
radar_detect accordingly depending on chanctx
reservation status.

This makes it possible to use the function for
channel_switch validation.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Michal Kazior 2014-06-25 12:35:07 +02:00 committed by Johannes Berg
parent 5bcae31d9c
commit 71e6195ed2
1 changed files with 31 additions and 4 deletions
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35
net/mac80211/util.c
View file

@ -2933,6 +2933,35 @@ void ieee80211_recalc_dtim(struct ieee80211_local *local,
ps->dtim_count = dtim_count;
}
static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
struct ieee80211_chanctx *ctx)
{
struct ieee80211_sub_if_data *sdata;
u8 radar_detect = 0;
lockdep_assert_held(&local->chanctx_mtx);
if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
return 0;
list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
if (sdata->reserved_radar_required)
radar_detect |= BIT(sdata->reserved_chandef.width);
/*
* An in-place reservation context should not have any assigned vifs
* until it replaces the other context.
*/
WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
!list_empty(&ctx->assigned_vifs));
list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
if (sdata->radar_required)
radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
return radar_detect;
}
int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
const struct cfg80211_chan_def *chandef,
enum ieee80211_chanctx_mode chanmode,
@ -2976,8 +3005,7 @@ int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
list_for_each_entry(ctx, &local->chanctx_list, list) {
if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
continue;
if (ctx->conf.radar_enabled)
radar_detect |= BIT(ctx->conf.def.width);
radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
num_different_channels++;
continue;
@ -3039,8 +3067,7 @@ int ieee80211_max_num_channels(struct ieee80211_local *local)
num_different_channels++;
if (ctx->conf.radar_enabled)
radar_detect |= BIT(ctx->conf.def.width);
radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
}
list_for_each_entry_rcu(sdata, &local->interfaces, list)