cfg80211: leave invalid channels on regdomain change

When the regulatory settings change, some channels might become invalid.
Disconnect interfaces acting on these channels, after giving userspace
code a grace period to leave them.

This mode is currently opt-in, and not all interface operating modes are
supported for regulatory-enforcement checks. A wiphy that wishes to use
the new enforcement code must specify an appropriate regulatory flag,
and all its supported interface modes must be supported by the checking
code.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Reviewed-by: Luis R. Rodriguez <mcgrof@suse.com>
[fix some indentation, typos]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/net/regulatory.h b/include/net/regulatory.h
index dad7ab20a8cb..b776d72d84be 100644
--- a/include/net/regulatory.h
+++ b/include/net/regulatory.h
@@ -136,6 +136,17 @@ struct regulatory_request {
  *      otherwise initiating radiation is not allowed. This will enable the
  *      relaxations enabled under the CFG80211_REG_RELAX_NO_IR configuration
  *      option
+ * @REGULATORY_IGNORE_STALE_KICKOFF: the regulatory core will _not_ make sure
+ *      all interfaces on this wiphy reside on allowed channels. If this flag
+ *      is not set, upon a regdomain change, the interfaces are given a grace
+ *      period (currently 60 seconds) to disconnect or move to an allowed
+ *      channel. Interfaces on forbidden channels are forcibly disconnected.
+ *      Currently these types of interfaces are supported for enforcement:
+ *      NL80211_IFTYPE_ADHOC, NL80211_IFTYPE_STATION, NL80211_IFTYPE_AP,
+ *      NL80211_IFTYPE_AP_VLAN, NL80211_IFTYPE_MONITOR,
+ *      NL80211_IFTYPE_P2P_CLIENT, NL80211_IFTYPE_P2P_GO,
+ *      NL80211_IFTYPE_P2P_DEVICE. The flag will be set by default if a device
+ *      includes any modes unsupported for enforcement checking.
  */
 enum ieee80211_regulatory_flags {
         REGULATORY_CUSTOM_REG                   = BIT(0),
@@ -144,6 +155,7 @@ enum ieee80211_regulatory_flags {
         REGULATORY_COUNTRY_IE_FOLLOW_POWER      = BIT(3),
         REGULATORY_COUNTRY_IE_IGNORE            = BIT(4),
         REGULATORY_ENABLE_RELAX_NO_IR           = BIT(5),
+        REGULATORY_IGNORE_STALE_KICKOFF         = BIT(6),
 };
 
 struct ieee80211_freq_range {