cfg80211: Add attributes describing prohibited channel bandwidth
Since there are frequency bands (e.g. 5.9GHz) allowing channels
with only 10 or 5 MHz bandwidth, this patch adds attributes that
allow keeping track about this information.
When channel attributes are reported to user-space, make sure to
not break old tools, i.e. if the 'split wiphy dump' is enabled,
report the extra attributes (if present) describing the bandwidth
restrictions. If the 'split wiphy dump' is not enabled,
completely omit those channels that have flags set to either
IEEE80211_CHAN_NO_10MHZ or IEEE80211_CHAN_NO_20MHZ.
Add the check for new bandwidth restriction flags in
cfg80211_chandef_usable() to comply with the restrictions.
Signed-off-by: Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 3dd2cb4..c98cf08 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -111,6 +111,10 @@
* restrictions.
* @IEEE80211_CHAN_INDOOR_ONLY: see %NL80211_FREQUENCY_ATTR_INDOOR_ONLY
* @IEEE80211_CHAN_GO_CONCURRENT: see %NL80211_FREQUENCY_ATTR_GO_CONCURRENT
+ * @IEEE80211_CHAN_NO_20MHZ: 20 MHz bandwidth is not permitted
+ * on this channel.
+ * @IEEE80211_CHAN_NO_10MHZ: 10 MHz bandwidth is not permitted
+ * on this channel.
*
*/
enum ieee80211_channel_flags {
@@ -125,6 +129,8 @@
IEEE80211_CHAN_NO_160MHZ = 1<<8,
IEEE80211_CHAN_INDOOR_ONLY = 1<<9,
IEEE80211_CHAN_GO_CONCURRENT = 1<<10,
+ IEEE80211_CHAN_NO_20MHZ = 1<<11,
+ IEEE80211_CHAN_NO_10MHZ = 1<<12,
};
#define IEEE80211_CHAN_NO_HT40 \