{nl,cfg,mac}80211: implement dot11MeshHWMProotInterval and dot11MeshHWMPactivePathToRootTimeout

Add the mesh configuration parameters dot11MeshHWMProotInterval
and dot11MeshHWMPactivePathToRootTimeout to be used by
proactive PREQ mechanism.

Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
[line-break commit log]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index e4f41bd..6936fab 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -2185,6 +2185,13 @@
  *
  * @NL80211_MESHCONF_ATTR_MAX: highest possible mesh configuration attribute
  *
+ * @NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT: The time (in TUs) for
+ *	which mesh STAs receiving a proactive PREQ shall consider the forwarding
+ *	information to the root mesh STA to be valid.
+ *
+ * @NL80211_MESHCONF_HWMP_ROOT_INTERVAL: The interval of time (in TUs) between
+ *	proactive PREQs are transmitted.
+ *
  * @__NL80211_MESHCONF_ATTR_AFTER_LAST: internal use
  */
 enum nl80211_meshconf_params {
@@ -2211,6 +2218,8 @@
 	NL80211_MESHCONF_RSSI_THRESHOLD,
 	NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
 	NL80211_MESHCONF_HT_OPMODE,
+	NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
+	NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
 
 	/* keep last */
 	__NL80211_MESHCONF_ATTR_AFTER_LAST,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 76d5472..e52b38d 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -842,6 +842,13 @@
  * @rssi_threshold: the threshold for average signal strength of candidate
  *	station to establish a peer link
  * @ht_opmode: mesh HT protection mode
+ *
+ * @dot11MeshHWMPactivePathToRootTimeout: The time (in TUs) for which mesh STAs
+ *	receiving a proactive PREQ shall consider the forwarding information to
+ *	the root mesh STA to be valid.
+ *
+ * @dot11MeshHWMProotInterval: The interval of time (in TUs) between proactive
+ *	PREQs are transmitted.
  */
 struct mesh_config {
 	u16 dot11MeshRetryTimeout;
@@ -866,6 +873,8 @@
 	bool dot11MeshForwarding;
 	s32 rssi_threshold;
 	u16 ht_opmode;
+	u32 dot11MeshHWMPactivePathToRootTimeout;
+	u16 dot11MeshHWMProotInterval;
 };
 
 /**