mac80211: improve mpath debugging

make hwmp_dbg print the relevant sdata->name by default and improve
formatting. Also add mpath_dbg macro for debugging of mesh path
operations.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/Kconfig

@@ -199,6 +199,19 @@ config MAC80211_VERBOSE_MPL_DEBUG
 
 	  Do not select this option.
 
+config MAC80211_VERBOSE_MPATH_DEBUG
+	bool "Verbose mesh path debugging"
+	depends on MAC80211_DEBUG_MENU
+	depends on MAC80211_MESH
+	---help---
+	  Selecting this option causes mac80211 to print out very
+	  verbose mesh path selection debugging messages (when mac80211
+	  is taking part in a mesh network).
+	  It should not be selected on production systems as those
+	  messages are remotely triggerable.
+
+	  Do not select this option.
+
 config MAC80211_VERBOSE_MHWMP_DEBUG
 	bool "Verbose mesh HWMP routing debugging"
 	depends on MAC80211_DEBUG_MENU