stats: add /if/<n>/<n>/state for lacp interface state

Add /if/lacp/<bond-sw_if_index>/<slave-sw_if_index>/state

<bond-sw_if_index> is a vector of the bond sw_if_index
<slave-sw_if_index> is a vector of the slave sw_if_index
Content is the integer value of the lacp actor state. The state is actually
a bitfield as described in the lacp protocol spec.

Type: feature

Signed-off-by: Steven Luong <sluong@cisco.com>
Change-Id: Ic6eca8ce2a1acd2d858e4e50b7eac1d000ea08e5
Signed-off-by: Ole Troan <ot@cisco.com>
(cherry picked from commit 0f09a828ad2dc53d4f1e69de536f3104eaccc4b0)

4 files changed, 107 insertions, 3 deletions

diff --git a/src/vnet/bonding/cli.c b/src/vnet/bonding/cli.c
index f45a31ce99a..4e0d30aa598 100644
--- a/src/vnet/bonding/cli.c
+++ b/src/vnet/bonding/cli.c
@@ -20,6 +20,7 @@
 #include <vlib/unix/unix.h>
 #include <vnet/ethernet/ethernet.h>
 #include <vnet/bonding/node.h>
+#include <vpp/stats/stat_segment.h>
 
 void
 bond_disable_collecting_distributing (vlib_main_t * vm, slave_if_t * sif)
@@ -96,7 +97,9 @@ bond_disable_collecting_distributing (vlib_main_t * vm, slave_if_t * sif)
     }
   clib_spinlock_unlock_if_init (&bif->lockp);
 
-  return;
+  if (bif->mode == BOND_MODE_LACP)
+    stat_segment_set_state_counter (bm->stats[bif->sw_if_index]
+				    [sif->sw_if_index], sif->actor.state);
 }
 
 void
@@ -165,7 +168,9 @@ bond_enable_collecting_distributing (vlib_main_t * vm, slave_if_t * sif)
     }
   clib_spinlock_unlock_if_init (&bif->lockp);
 
-  return;
+  if (bif->mode == BOND_MODE_LACP)
+    stat_segment_set_state_counter (bm->stats[bif->sw_if_index]
+				    [sif->sw_if_index], sif->actor.state);
 }
 
 int
@@ -278,6 +283,10 @@ bond_delete_neighbor (vlib_main_t * vm, bond_if_t * bif, slave_if_t * sif)
   if ((bif->mode == BOND_MODE_LACP) && bm->lacp_enable_disable)
     (*bm->lacp_enable_disable) (vm, bif, sif, 0);
 
+  if (bif->mode == BOND_MODE_LACP)
+    stat_segment_deregister_state_counter
+      (bm->stats[bif->sw_if_index][sif->sw_if_index]);
+
   pool_put (bm->neighbors, sif);
 }
 
@@ -573,6 +582,24 @@ bond_enslave (vlib_main_t * vm, bond_enslave_args_t * args)
 	clib_error_return (0, "bond interface cannot be enslaved");
       return;
     }
+  if (bif->mode == BOND_MODE_LACP)
+    {
+      u8 *name = format (0, "/if/lacp/%u/%u/state", bif->sw_if_index,
+			 args->slave);
+
+      vec_validate (bm->stats, bif->sw_if_index);
+      vec_validate (bm->stats[bif->sw_if_index], args->slave);
+
+      args->error = stat_segment_register_state_counter
+	(name, &bm->stats[bif->sw_if_index][args->slave]);
+      vec_free (name);
+      if (args->error != 0)
+	{
+	  args->rv = VNET_API_ERROR_INVALID_INTERFACE;
+	  return;
+	}
+    }
+
   pool_get (bm->neighbors, sif);
   clib_memset (sif, 0, sizeof (*sif));
   sw = pool_elt_at_index (im->sw_interfaces, args->slave);
diff --git a/src/vnet/bonding/node.h b/src/vnet/bonding/node.h
index 94b43dcd1d9..1ad19dec872 100644
--- a/src/vnet/bonding/node.h
+++ b/src/vnet/bonding/node.h
@@ -367,6 +367,8 @@ typedef struct
   uword *slave_by_sw_if_index;
 
   bond_per_thread_data_t *per_thread_data;
+
+  u32 **stats;
 } bond_main_t;
 
 /* bond packet trace capture */
diff --git a/src/vpp/stats/stat_segment.c b/src/vpp/stats/stat_segment.c
index 0eabc032592..9e27e69a331 100644
--- a/src/vpp/stats/stat_segment.c
+++ b/src/vpp/stats/stat_segment.c
@@ -358,6 +358,10 @@ format_stat_dir_entry (u8 * s, va_list * args)
       type_name = "ErrIndex";
       break;
 
+    case STAT_DIR_TYPE_NAME_VECTOR:
+      type_name = "NameVector";
+      break;
+
     default:
       type_name = "illegal!";
       break;
@@ -734,7 +738,6 @@ VLIB_INIT_FUNCTION (statseg_init) =
 };
 /* *INDENT-ON* */
 
-
 clib_error_t *
 stat_segment_register_gauge (u8 * name, stat_segment_update_fn update_fn,
 			     u32 caller_index)
@@ -778,6 +781,73 @@ stat_segment_register_gauge (u8 * name, stat_segment_update_fn update_fn,
   return NULL;
 }
 
+clib_error_t *
+stat_segment_register_state_counter (u8 * name, u32 * index)
+{
+  stat_segment_main_t *sm = &stat_segment_main;
+  stat_segment_shared_header_t *shared_header = sm->shared_header;
+  void *oldheap;
+  stat_segment_directory_entry_t e;
+
+  ASSERT (shared_header);
+  ASSERT (vlib_get_thread_index () == 0);
+
+  u32 next_vector_index = vec_len (sm->directory_vector);
+  u32 vector_index = lookup_or_create_hash_index (name,
+						  next_vector_index);
+
+  if (vector_index < next_vector_index)	/* Already registered */
+    return clib_error_return (0, "%v is already registered", name);
+
+  oldheap = vlib_stats_push_heap (NULL);
+  vlib_stat_segment_lock ();
+
+  memset (&e, 0, sizeof (e));
+  e.type = STAT_DIR_TYPE_SCALAR_INDEX;
+
+  memcpy (e.name, name, vec_len (name));
+  vec_add1 (sm->directory_vector, e);
+
+  shared_header->directory_offset =
+    stat_segment_offset (shared_header, sm->directory_vector);
+
+  vlib_stat_segment_unlock ();
+  clib_mem_set_heap (oldheap);
+
+  *index = next_vector_index;
+  return 0;
+}
+
+clib_error_t *
+stat_segment_deregister_state_counter (u32 index)
+{
+  stat_segment_main_t *sm = &stat_segment_main;
+  stat_segment_shared_header_t *shared_header = sm->shared_header;
+  stat_segment_directory_entry_t *e;
+
+  ASSERT (shared_header);
+
+  if (index > vec_len (sm->directory_vector))
+    return clib_error_return (0, "%u index does not exist", index);
+
+  e = &sm->directory_vector[index];
+  if (e->type != STAT_DIR_TYPE_SCALAR_INDEX)
+    return clib_error_return (0, "%u index cannot be deleted", index);
+
+  hash_unset (sm->directory_vector_by_name, &e->name);
+  vec_del1 (sm->directory_vector, index);
+  return 0;
+}
+
+void
+stat_segment_set_state_counter (u32 index, u64 value)
+{
+  stat_segment_main_t *sm = &stat_segment_main;
+
+  ASSERT (index < vec_len (sm->directory_vector));
+  sm->directory_vector[index].index = value;
+}
+
 static clib_error_t *
 statseg_config (vlib_main_t * vm, unformat_input_t * input)
 {
diff --git a/src/vpp/stats/stat_segment.h b/src/vpp/stats/stat_segment.h
index 5c55cf94ff9..eae6902dc75 100644
--- a/src/vpp/stats/stat_segment.h
+++ b/src/vpp/stats/stat_segment.h
@@ -107,5 +107,10 @@ extern stat_segment_main_t stat_segment_main;
 
 clib_error_t *
 stat_segment_register_gauge (u8 *names, stat_segment_update_fn update_fn, u32 index);
+clib_error_t *
+stat_segment_register_state_counter(u8 *name, u32 *index);
+clib_error_t *
+stat_segment_deregister_state_counter(u32 index);
+void stat_segment_set_state_counter (u32 index, u64 value);
 
 #endif