stats: Add interface name to sw_if_index as /if/names

Expose interface name to sw_if_index table as a directory node in the stats segment.

Change-Id: Ie50e4af01997d141880f02e3a8496bfeb91b9944
Signed-off-by: Ole Troan <ot@cisco.com>

3 files changed, 81 insertions, 10 deletions

diff --git a/src/vpp/app/vpp_get_stats.c b/src/vpp/app/vpp_get_stats.c
index 1c1298e2afd..1d878029dda 100644
--- a/src/vpp/app/vpp_get_stats.c
+++ b/src/vpp/app/vpp_get_stats.c
@@ -220,6 +220,15 @@ reconnect:
 	      fformat (stdout, "%.2f %s\n", res[i].scalar_value, res[i].name);
 	      break;
 
+	    case STAT_DIR_TYPE_NAME_VECTOR:
+	      if (res[i].name_vector == 0)
+		continue;
+	      for (k = 0; k < vec_len (res[i].name_vector); k++)
+		if (res[i].name_vector[k])
+		  fformat (stdout, "[%d]: %s %s\n", k, res[i].name_vector[k],
+			   res[i].name);
+	      break;
+
 	    default:
 	      ;
 	    }
diff --git a/src/vpp/stats/stat_segment.c b/src/vpp/stats/stat_segment.c
index ca78a103522..aa32aede3a5 100644
--- a/src/vpp/stats/stat_segment.c
+++ b/src/vpp/stats/stat_segment.c
@@ -268,7 +268,7 @@ vlib_map_stat_segment_init (void)
   /* Scalar stats and node counters */
   vec_validate (sm->directory_vector, STAT_COUNTERS - 1);
 #define _(E,t,n,p)							\
-  strcpy(sm->directory_vector[STAT_COUNTER_##E].name,  "/sys" #p "/" #n); \
+  strcpy(sm->directory_vector[STAT_COUNTER_##E].name,  #p "/" #n); \
   sm->directory_vector[STAT_COUNTER_##E].type = STAT_DIR_TYPE_##t;
   foreach_stat_segment_counter_name
 #undef _
@@ -686,8 +686,66 @@ statseg_config (vlib_main_t * vm, unformat_input_t * input)
   return 0;
 }
 
+static clib_error_t *
+statseg_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
+{
+  stat_segment_main_t *sm = &stat_segment_main;
+  stat_segment_shared_header_t *shared_header = sm->shared_header;
+
+  void *oldheap = vlib_stats_push_heap ();
+  vlib_stat_segment_lock ();
+
+  vec_validate (sm->interfaces, sw_if_index);
+  if (is_add)
+    {
+      vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
+      vnet_sw_interface_t *si_sup =
+	vnet_get_sup_sw_interface (vnm, si->sw_if_index);
+      vnet_hw_interface_t *hi_sup;
+
+      ASSERT (si_sup->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
+      hi_sup = vnet_get_hw_interface (vnm, si_sup->hw_if_index);
+
+      u8 *s = 0;
+      s = format (s, "%v", hi_sup->name);
+      if (si->type != VNET_SW_INTERFACE_TYPE_HARDWARE)
+	s = format (s, ".%d", si->sub.id);
+      s = format (s, "%c", 0);
+      sm->interfaces[sw_if_index] = s;
+    }
+  else
+    {
+      vec_free (sm->interfaces[sw_if_index]);
+      sm->interfaces[sw_if_index] = 0;
+    }
+
+  stat_segment_directory_entry_t *ep;
+  ep = &sm->directory_vector[STAT_COUNTER_INTERFACE_NAMES];
+  ep->offset = stat_segment_offset (shared_header, sm->interfaces);
+
+  int i;
+  u64 *offset_vector =
+    ep->offset_vector ? stat_segment_pointer (shared_header,
+					      ep->offset_vector) : 0;
+
+  vec_validate (offset_vector, vec_len (sm->interfaces) - 1);
+  for (i = 0; i < vec_len (sm->interfaces); i++)
+    {
+      offset_vector[i] =
+	sm->interfaces[i] ? stat_segment_offset (shared_header,
+						 sm->interfaces[i]) : 0;
+    }
+  ep->offset_vector = stat_segment_offset (shared_header, offset_vector);
+
+  vlib_stat_segment_unlock ();
+  clib_mem_set_heap (oldheap);
+
+  return 0;
+}
+
 VLIB_INIT_FUNCTION (statseg_init);
 VLIB_EARLY_CONFIG_FUNCTION (statseg_config, "statseg");
+VNET_SW_INTERFACE_ADD_DEL_FUNCTION (statseg_sw_interface_add_del);
 
 /* *INDENT-OFF* */
 VLIB_REGISTER_NODE (stat_segment_collector, static) =
diff --git a/src/vpp/stats/stat_segment.h b/src/vpp/stats/stat_segment.h
index fb450f38f53..917b512aecb 100644
--- a/src/vpp/stats/stat_segment.h
+++ b/src/vpp/stats/stat_segment.h
@@ -32,19 +32,21 @@ typedef enum
  STAT_COUNTER_NODE_VECTORS,
  STAT_COUNTER_NODE_CALLS,
  STAT_COUNTER_NODE_SUSPENDS,
+ STAT_COUNTER_INTERFACE_NAMES,
  STAT_COUNTERS
 } stat_segment_counter_t;
 
 #define foreach_stat_segment_counter_name			\
-  _(VECTOR_RATE, SCALAR_INDEX, vector_rate,)			\
-  _(INPUT_RATE, SCALAR_INDEX, input_rate,)			\
-  _(LAST_UPDATE, SCALAR_INDEX, last_update,)			\
-  _(LAST_STATS_CLEAR, SCALAR_INDEX, last_stats_clear,)		\
-  _(HEARTBEAT, SCALAR_INDEX, heartbeat,)			\
-  _(NODE_CLOCKS, COUNTER_VECTOR_SIMPLE, clocks, /node)		\
-  _(NODE_VECTORS, COUNTER_VECTOR_SIMPLE, vectors, /node)	\
-  _(NODE_CALLS, COUNTER_VECTOR_SIMPLE, calls, /node)		\
-  _(NODE_SUSPENDS, COUNTER_VECTOR_SIMPLE, suspends, /node)
+  _(VECTOR_RATE, SCALAR_INDEX, vector_rate, /sys)		\
+  _(INPUT_RATE, SCALAR_INDEX, input_rate, /sys)			\
+  _(LAST_UPDATE, SCALAR_INDEX, last_update, /sys)		\
+  _(LAST_STATS_CLEAR, SCALAR_INDEX, last_stats_clear, /sys)	\
+  _(HEARTBEAT, SCALAR_INDEX, heartbeat, /sys)			\
+  _(NODE_CLOCKS, COUNTER_VECTOR_SIMPLE, clocks, /sys/node)	\
+  _(NODE_VECTORS, COUNTER_VECTOR_SIMPLE, vectors, /sys/node)	\
+  _(NODE_CALLS, COUNTER_VECTOR_SIMPLE, calls, /sys/node)	\
+  _(NODE_SUSPENDS, COUNTER_VECTOR_SIMPLE, suspends, /sys/node)	\
+  _(INTERFACE_NAMES, NAME_VECTOR, names, /if)
 
 typedef struct
 {
@@ -101,6 +103,8 @@ typedef struct
   /* statistics segment */
   uword *directory_vector_by_name;
   stat_segment_directory_entry_t *directory_vector;
+  u8 **interfaces;
+
   clib_spinlock_t *stat_segment_lockp;
   clib_socket_t *socket;
   u8 *socket_name;