[ovs-dev,v4,1/3] rstp: Add rstp port name for human reading.

diff --git a/lib/rstp-common.h b/lib/rstp-common.h
index 27e8079..c108232 100644
--- a/lib/rstp-common.h
+++ b/lib/rstp-common.h
@@ -262,6 +262,7 @@  struct rstp_port {
     struct rstp *rstp OVS_GUARDED_BY(rstp_mutex);
     struct hmap_node node OVS_GUARDED_BY(rstp_mutex); /* In rstp->ports. */
     void *aux OVS_GUARDED_BY(rstp_mutex);
+    char *port_name;
     struct rstp_bpdu received_bpdu_buffer OVS_GUARDED_BY(rstp_mutex);
     /*************************************************************************
      * MAC status parameters
diff --git a/lib/rstp.c b/lib/rstp.c
index 907a907..67e6912 100644
--- a/lib/rstp.c
+++ b/lib/rstp.c
@@ -751,6 +751,14 @@  rstp_port_set_port_number__(struct rstp_port *port, uint16_t port_number)
     }
 }
 
+static void
+rstp_port_set_port_name__(struct rstp_port *port, const char *name)
+    OVS_REQUIRES(rstp_mutex)
+{
+    free(port->port_name);
+    port->port_name = xstrdup(name);
+}
+
 /* Converts the link speed to a port path cost [Table 17-3]. */
 uint32_t
 rstp_convert_speed_to_cost(unsigned int speed)
@@ -1164,6 +1172,7 @@  rstp_add_port(struct rstp *rstp)
     rstp_port_set_priority__(p, RSTP_DEFAULT_PORT_PRIORITY);
     rstp_port_set_port_number__(p, 0);
     p->aux = NULL;
+    p->port_name = NULL;
     rstp_initialize_port_defaults__(p);
     VLOG_DBG("%s: RSTP port "RSTP_PORT_ID_FMT" initialized.", rstp->name,
              p->port_id);
@@ -1201,6 +1210,7 @@  rstp_port_unref(struct rstp_port *rp)
         ovs_mutex_lock(&rstp_mutex);
         rstp = rp->rstp;
         rstp_port_set_state__(rp, RSTP_DISABLED);
+        free(rp->port_name);
         hmap_remove(&rstp->ports, &rp->node);
         VLOG_DBG("%s: removed port "RSTP_PORT_ID_FMT"", rstp->name,
                  rp->port_id);
@@ -1439,13 +1449,15 @@  void
 rstp_port_set(struct rstp_port *port, uint16_t port_num, int priority,
               uint32_t path_cost, bool is_admin_edge, bool is_auto_edge,
               enum rstp_admin_point_to_point_mac_state admin_p2p_mac_state,
-              bool admin_port_state, bool do_mcheck, void *aux)
+              bool admin_port_state, bool do_mcheck, void *aux,
+              const char *name)
     OVS_EXCLUDED(rstp_mutex)
 {
     ovs_mutex_lock(&rstp_mutex);
     port->aux = aux;
     rstp_port_set_priority__(port, priority);
     rstp_port_set_port_number__(port, port_num);
+    rstp_port_set_port_name__(port, name);
     rstp_port_set_path_cost__(port, path_cost);
     rstp_port_set_admin_edge__(port, is_admin_edge);
     rstp_port_set_auto_edge__(port, is_auto_edge);
diff --git a/lib/rstp.h b/lib/rstp.h
index 4942d59..5213f98 100644
--- a/lib/rstp.h
+++ b/lib/rstp.h
@@ -227,7 +227,8 @@  uint32_t rstp_convert_speed_to_cost(unsigned int speed);
 void rstp_port_set(struct rstp_port *, uint16_t port_num, int priority,
                    uint32_t path_cost, bool is_admin_edge, bool is_auto_edge,
                    enum rstp_admin_point_to_point_mac_state admin_p2p_mac_state,
-                   bool admin_port_state, bool do_mcheck, void *aux)
+                   bool admin_port_state, bool do_mcheck, void *aux,
+                   const char *name)
     OVS_EXCLUDED(rstp_mutex);
 
 enum rstp_state rstp_port_get_state(const struct rstp_port *)
diff --git a/ofproto/ofproto-dpif.c b/ofproto/ofproto-dpif.c
index 5d247e3..231b5b0 100644
--- a/ofproto/ofproto-dpif.c
+++ b/ofproto/ofproto-dpif.c
@@ -2761,7 +2761,7 @@  set_rstp_port(struct ofport *ofport_,
     rstp_port_set(rp, s->port_num, s->priority, s->path_cost,
                   s->admin_edge_port, s->auto_edge,
                   s->admin_p2p_mac_state, s->admin_port_state, s->mcheck,
-                  ofport);
+                  ofport, netdev_get_name(ofport->up.netdev));
     update_rstp_port_state(ofport);
     /* Synchronize operational status. */
     rstp_port_set_mac_operational(rp, ofport->may_enable);