On Thu, 2012-12-13 at 14:58 +0100, Simon Wunderlich wrote:
> +++ b/include/net/cfg80211.h
> @@ -133,6 +133,11 @@ enum ieee80211_channel_flags {
> * to enable this, this is useful only on 5 GHz band.
> * @orig_mag: internal use
> * @orig_mpwr: internal use
> + * @radar_detect_timeout: this timeout indicates the end of the channel
> + * availability check for radar channels (in jiffies), only after this
> + * period the user may initiate the tx on the channel.
> + * @cac_type: indicates that channel availability check is started for this
> + * channel type.
> */
> struct ieee80211_channel {
> enum ieee80211_band band;
> @@ -145,6 +150,9 @@ struct ieee80211_channel {
> bool beacon_found;
> u32 orig_flags;
> int orig_mag, orig_mpwr;
> + unsigned long radar_detect_timeout;
> + enum nl80211_channel_type cac_type;
> + bool cac_started;
Since we lock a channel, all of these should probably move to the
rdev/wiphy struct, I think.
And then the code checking channel contexts needs to be extended to not
allow another while a channel context is in use:
> + mutex_lock(&rdev->devlist_mtx);
> + err = cfg80211_can_use_chan(rdev, wdev, chandef.chan,
> + CHAN_MODE_SINGLE_ONLY);
> + mutex_unlock(&rdev->devlist_mtx);
This only does a spot check, keeping state needs to be handled
separately.
johannes
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