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cfg80211/mac80211: move interface counting for combination check to mac80211

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Move the counting part of the interface combination check from
cfg80211 to mac80211.

This is needed to simplify locking when the driver has to perform a
combination check by itself (eg. with channel-switch).

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Luciano Coelho
2014-02-13 11:31:59 +02:00
committed by Johannes Berg
parent 2beb6dab2d
commit 73de86a389
11 changed files with 110 additions and 80 deletions
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72
net/mac80211/util.c
View File

@@ -2797,3 +2797,75 @@ void ieee80211_recalc_dtim(struct ieee80211_local *local,
ps->dtim_count = dtim_count;
}
int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
const struct cfg80211_chan_def *chandef,
enum ieee80211_chanctx_mode chanmode,
u8 radar_detect)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_sub_if_data *sdata_iter;
enum nl80211_iftype iftype = sdata->wdev.iftype;
int num[NUM_NL80211_IFTYPES];
struct ieee80211_chanctx *ctx;
int num_different_channels = 1;
int total = 1;
lockdep_assert_held(&local->chanctx_mtx);
if (WARN_ON(hweight32(radar_detect) > 1))
return -EINVAL;
if (WARN_ON(chanmode == IEEE80211_CHANCTX_SHARED && !chandef->chan))
return -EINVAL;
if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
return -EINVAL;
/* Always allow software iftypes */
if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
if (radar_detect)
return -EINVAL;
return 0;
}
memset(num, 0, sizeof(num));
if (iftype != NL80211_IFTYPE_UNSPECIFIED)
num[iftype] = 1;
list_for_each_entry(ctx, &local->chanctx_list, list) {
if (ctx->conf.radar_enabled)
radar_detect |= BIT(ctx->conf.def.width);
if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
num_different_channels++;
continue;
}
if ((chanmode == IEEE80211_CHANCTX_SHARED) &&
cfg80211_chandef_compatible(chandef,
&ctx->conf.def))
continue;
num_different_channels++;
}
list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
struct wireless_dev *wdev_iter;
wdev_iter = &sdata_iter->wdev;
if (sdata_iter == sdata ||
rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
continue;
num[wdev_iter->iftype]++;
total++;
}
if (total == 1 && !radar_detect)
return 0;
return cfg80211_check_combinations(local->hw.wiphy,
num_different_channels,
radar_detect, num);
}