{nl,cfg,mac}80211: let userspace make meshif mesh gate

Allow userspace to set NL80211_MESHCONF_GATE_ANNOUNCEMENTS attribute,
which will advertise this mesh node as being a mesh gate.
NL80211_HWMP_ROOTMODE must be set or this will do nothing.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 9995c83..7d17a91 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1137,6 +1137,10 @@
 		conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
 		ieee80211_mesh_root_setup(ifmsh);
 	}
+	if (_chg_mesh_attr(NL80211_MESHCONF_GATE_ANNOUNCEMENTS, mask)) {
+		conf->dot11MeshGateAnnouncementProtocol =
+			nconf->dot11MeshGateAnnouncementProtocol;
+	}
 	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask)) {
 		conf->dot11MeshHWMPRannInterval =
 			nconf->dot11MeshHWMPRannInterval;
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index bac9443..6e8eab7 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -372,6 +372,8 @@
 		u.mesh.mshcfg.min_discovery_timeout, DEC);
 IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
 		u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
+IEEE80211_IF_FILE(dot11MeshGateAnnouncementProtocol,
+		u.mesh.mshcfg.dot11MeshGateAnnouncementProtocol, DEC);
 IEEE80211_IF_FILE(dot11MeshHWMPRannInterval,
 		u.mesh.mshcfg.dot11MeshHWMPRannInterval, DEC);
 #endif
@@ -489,6 +491,7 @@
 	MESHPARAMS_ADD(min_discovery_timeout);
 	MESHPARAMS_ADD(dot11MeshHWMPRootMode);
 	MESHPARAMS_ADD(dot11MeshHWMPRannInterval);
+	MESHPARAMS_ADD(dot11MeshGateAnnouncementProtocol);
 #undef MESHPARAMS_ADD
 }
 #endif
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index ae3de75..fd4f76a 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -1045,8 +1045,11 @@
 {
 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 	u32 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
+	u8 flags;
 
-	mesh_path_sel_frame_tx(MPATH_RANN, 0, sdata->vif.addr,
+	flags = (ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol)
+			? RANN_FLAG_IS_GATE : 0;
+	mesh_path_sel_frame_tx(MPATH_RANN, flags, sdata->vif.addr,
 			       cpu_to_le32(++ifmsh->sn),
 			       0, NULL, 0, broadcast_addr,
 			       0, sdata->u.mesh.mshcfg.element_ttl,