7 files changed, 33 insertions, 0 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 7a0bd6ea6f63..d2f276de9abe 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -1200,6 +1200,8 @@ enum nl80211_mntr_flags {
  * @NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME: The interval of time (in TUs)
  * that it takes for an HWMP information element to propagate across the mesh
  *
+ * @NL80211_MESHCONF_ROOTMODE: whether root mode is enabled or not
+ *
  * @NL80211_MESHCONF_ATTR_MAX: highest possible mesh configuration attribute
  *
  * @__NL80211_MESHCONF_ATTR_AFTER_LAST: internal use
@@ -1219,6 +1221,7 @@ enum nl80211_meshconf_params {
         NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
         NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
         NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
+        NL80211_MESHCONF_HWMP_ROOTMODE,
 
         /* keep last */
         __NL80211_MESHCONF_ATTR_AFTER_LAST,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 7d0ae9c18286..0e4c51fc63e5 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -508,6 +508,7 @@ struct mesh_config {
         u32 dot11MeshHWMPactivePathTimeout;
         u16 dot11MeshHWMPpreqMinInterval;
         u16 dot11MeshHWMPnetDiameterTraversalTime;
+        u8  dot11MeshHWMPRootMode;
 };
 
 /**
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 81053587e72b..7f18c8fa1880 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1029,7 +1029,10 @@ static int ieee80211_set_mesh_params(struct wiphy *wiphy,
 {
         struct mesh_config *conf;
         struct ieee80211_sub_if_data *sdata;
+        struct ieee80211_if_mesh *ifmsh;
+
         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+        ifmsh = &sdata->u.mesh;
 
         /* Set the config options which we are interested in setting */
         conf = &(sdata->u.mesh.mshcfg);
@@ -1064,6 +1067,10 @@ static int ieee80211_set_mesh_params(struct wiphy *wiphy,
                            mask))
                 conf->dot11MeshHWMPnetDiameterTraversalTime =
                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
+        if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOTMODE, mask)) {
+                conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
+                ieee80211_mesh_root_setup(ifmsh);
+        }
         return 0;
 }
 
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index 8782264f49e7..472b2039906c 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -149,6 +149,8 @@ IEEE80211_IF_FILE(path_refresh_time,
                 u.mesh.mshcfg.path_refresh_time, DEC);
 IEEE80211_IF_FILE(min_discovery_timeout,
                 u.mesh.mshcfg.min_discovery_timeout, DEC);
+IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
+                u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
 #endif
 
 
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 88dcfe3030b1..05955dc6b3d3 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -373,6 +373,17 @@ static void ieee80211_mesh_path_root_timer(unsigned long data)
         ieee80211_queue_work(&local->hw, &ifmsh->work);
 }
 
+void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
+{
+        if (ifmsh->mshcfg.dot11MeshHWMPRootMode)
+                set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
+        else {
+                clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
+                /* stop running timer */
+                del_timer_sync(&ifmsh->mesh_path_root_timer);
+        }
+}
+
 /**
  * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
  * @hdr:        802.11 frame header
@@ -503,6 +514,7 @@ void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata)
                 add_timer(&ifmsh->mesh_path_timer);
         if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running))
                 add_timer(&ifmsh->mesh_path_root_timer);
+        ieee80211_mesh_root_setup(ifmsh);
 }
 #endif
 
@@ -512,6 +524,7 @@ void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
         struct ieee80211_local *local = sdata->local;
 
         set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
+        ieee80211_mesh_root_setup(ifmsh);
         ieee80211_queue_work(&local->hw, &ifmsh->work);
         sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL;
         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON |
diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index 00ee84258196..5ad6975bf28c 100644
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -242,6 +242,7 @@ ieee80211_rx_result
 ieee80211_mesh_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata);
+void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh);
 
 /* Mesh paths */
 int mesh_nexthop_lookup(struct sk_buff *skb,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 7c1999872503..17bcad69428d 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -2616,6 +2616,8 @@ static int nl80211_get_mesh_params(struct sk_buff *skb,
                         cur_params.dot11MeshHWMPpreqMinInterval);
         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
+        NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
+                        cur_params.dot11MeshHWMPRootMode);
         nla_nest_end(msg, pinfoattr);
         genlmsg_end(msg, hdr);
         err = genlmsg_reply(msg, info);
@@ -2726,6 +2728,10 @@ static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
                         dot11MeshHWMPnetDiameterTraversalTime,
                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
                         nla_get_u16);
+        FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
+                        dot11MeshHWMPRootMode, mask,
+                        NL80211_MESHCONF_HWMP_ROOTMODE,
+                        nla_get_u8);
 
         /* Apply changes */
         err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);