Reorganize source tree to use single autotools instance

Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 1346 insertions, 0 deletions

diff --git a/src/vlibmemory/memory_vlib.c b/src/vlibmemory/memory_vlib.c
new file mode 100644
index 00000000000..1d40bcb791f
--- /dev/null
+++ b/src/vlibmemory/memory_vlib.c
@@ -0,0 +1,1346 @@
+/*
+ *------------------------------------------------------------------
+ * memory_vlib.c
+ *
+ * Copyright (c) 2009 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <signal.h>
+#include <pthread.h>
+#include <vppinfra/vec.h>
+#include <vppinfra/hash.h>
+#include <vppinfra/pool.h>
+#include <vppinfra/format.h>
+#include <vppinfra/byte_order.h>
+#include <vppinfra/elog.h>
+#include <stdarg.h>
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+
+#define TRACE_VLIB_MEMORY_QUEUE 0
+
+#include <vlibmemory/vl_memory_msg_enum.h>	/* enumerate all vlib messages */
+
+#define vl_typedefs		/* define message structures */
+#include <vlibmemory/vl_memory_api_h.h>
+#undef vl_typedefs
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <vlibmemory/vl_memory_api_h.h>
+#undef vl_printfun
+
+static inline void *
+vl_api_memclnt_create_t_print (vl_api_memclnt_create_t * a, void *handle)
+{
+  vl_print (handle, "vl_api_memclnt_create_t:\n");
+  vl_print (handle, "name: %s\n", a->name);
+  vl_print (handle, "input_queue: 0x%wx\n", a->input_queue);
+  vl_print (handle, "context: %u\n", (unsigned) a->context);
+  vl_print (handle, "ctx_quota: %ld\n", (long) a->ctx_quota);
+  return handle;
+}
+
+static inline void *
+vl_api_memclnt_delete_t_print (vl_api_memclnt_delete_t * a, void *handle)
+{
+  vl_print (handle, "vl_api_memclnt_delete_t:\n");
+  vl_print (handle, "index: %u\n", (unsigned) a->index);
+  vl_print (handle, "handle: 0x%wx\n", a->handle);
+  return handle;
+}
+
+/* instantiate all the endian swap functions we know about */
+#define vl_endianfun
+#include <vlibmemory/vl_memory_api_h.h>
+#undef vl_endianfun
+
+void vl_socket_api_send (vl_api_registration_t * rp, u8 * elem)
+  __attribute__ ((weak));
+
+void
+vl_socket_api_send (vl_api_registration_t * rp, u8 * elem)
+{
+  static int count;
+
+  if (count++ < 5)
+    clib_warning ("need to link against -lvlibsocket, msg not sent!");
+}
+
+void
+vl_msg_api_send (vl_api_registration_t * rp, u8 * elem)
+{
+  if (PREDICT_FALSE (rp->registration_type > REGISTRATION_TYPE_SHMEM))
+    {
+      vl_socket_api_send (rp, elem);
+    }
+  else
+    {
+      vl_msg_api_send_shmem (rp->vl_input_queue, elem);
+    }
+}
+
+u8 *
+vl_api_serialize_message_table (api_main_t * am, u8 * vector)
+{
+  serialize_main_t _sm, *sm = &_sm;
+  hash_pair_t *hp;
+  u32 nmsg = hash_elts (am->msg_index_by_name_and_crc);
+
+  serialize_open_vector (sm, vector);
+
+  /* serialize the count */
+  serialize_integer (sm, nmsg, sizeof (u32));
+
+  hash_foreach_pair (hp, am->msg_index_by_name_and_crc, (
+							  {
+							  serialize_likely_small_unsigned_integer
+							  (sm, hp->value[0]);
+							  serialize_cstring
+							  (sm,
+							   (char *) hp->key);
+							  }));
+
+  return serialize_close_vector (sm);
+}
+
+/*
+ * vl_api_memclnt_create_t_handler
+ */
+void
+vl_api_memclnt_create_t_handler (vl_api_memclnt_create_t * mp)
+{
+  vl_api_registration_t **regpp;
+  vl_api_registration_t *regp;
+  vl_api_memclnt_create_reply_t *rp;
+  svm_region_t *svm;
+  unix_shared_memory_queue_t *q;
+  int rv = 0;
+  void *oldheap;
+  api_main_t *am = &api_main;
+  u8 *serialized_message_table = 0;
+
+  /*
+   * This is tortured. Maintain a vlib-address-space private
+   * pool of client registrations. We use the shared-memory virtual
+   * address of client structure as a handle, to allow direct
+   * manipulation of context quota vbls from the client library.
+   *
+   * This scheme causes trouble w/ API message trace replay, since
+   * some random VA from clib_mem_alloc() certainly won't
+   * occur in the Linux sim. The (very) few places
+   * that care need to use the pool index.
+   *
+   * Putting the registration object(s) into a pool in shared memory and
+   * using the pool index as a handle seems like a great idea.
+   * Unfortunately, each and every reference to that pool would need
+   * to be protected by a mutex:
+   *
+   *     Client                      VLIB
+   *     ------                      ----
+   *     convert pool index to
+   *     pointer.
+   *     <deschedule>
+   *                                 expand pool
+   *                                 <deschedule>
+   *     kaboom!
+   */
+
+  pool_get (am->vl_clients, regpp);
+
+  svm = am->vlib_rp;
+
+  if (am->serialized_message_table_in_shmem == 0)
+    serialized_message_table = vl_api_serialize_message_table (am, 0);
+
+  pthread_mutex_lock (&svm->mutex);
+  oldheap = svm_push_data_heap (svm);
+  *regpp = clib_mem_alloc (sizeof (vl_api_registration_t));
+
+  regp = *regpp;
+  memset (regp, 0, sizeof (*regp));
+  regp->registration_type = REGISTRATION_TYPE_SHMEM;
+  regp->vl_api_registration_pool_index = regpp - am->vl_clients;
+
+  q = regp->vl_input_queue = (unix_shared_memory_queue_t *) (uword)
+    mp->input_queue;
+
+  regp->name = format (0, "%s", mp->name);
+  vec_add1 (regp->name, 0);
+  if (serialized_message_table)
+    am->serialized_message_table_in_shmem =
+      vec_dup (serialized_message_table);
+
+  pthread_mutex_unlock (&svm->mutex);
+  svm_pop_heap (oldheap);
+
+  vec_free (serialized_message_table);
+
+  rp = vl_msg_api_alloc (sizeof (*rp));
+  rp->_vl_msg_id = ntohs (VL_API_MEMCLNT_CREATE_REPLY);
+  rp->handle = (uword) regp;
+  rp->index = vl_msg_api_handle_from_index_and_epoch
+    (regp->vl_api_registration_pool_index,
+     am->shmem_hdr->application_restarts);
+  rp->context = mp->context;
+  rp->response = ntohl (rv);
+  rp->message_table = (u64) am->serialized_message_table_in_shmem;
+
+  vl_msg_api_send_shmem (q, (u8 *) & rp);
+}
+
+/* Application callback to clean up leftover registrations from this client */
+int vl_api_memclnt_delete_callback (u32 client_index) __attribute__ ((weak));
+
+int
+vl_api_memclnt_delete_callback (u32 client_index)
+{
+  return 0;
+}
+
+/*
+ * vl_api_memclnt_delete_t_handler
+ */
+void
+vl_api_memclnt_delete_t_handler (vl_api_memclnt_delete_t * mp)
+{
+  vl_api_registration_t **regpp;
+  vl_api_registration_t *regp;
+  vl_api_memclnt_delete_reply_t *rp;
+  svm_region_t *svm;
+  void *oldheap;
+  api_main_t *am = &api_main;
+  u32 handle, client_index, epoch;
+
+  handle = mp->index;
+
+  if (vl_api_memclnt_delete_callback (handle))
+    return;
+
+  epoch = vl_msg_api_handle_get_epoch (handle);
+  client_index = vl_msg_api_handle_get_index (handle);
+
+  if (epoch != (am->shmem_hdr->application_restarts & VL_API_EPOCH_MASK))
+    {
+      clib_warning
+	("Stale clnt delete index %d old epoch %d cur epoch %d",
+	 client_index, epoch,
+	 (am->shmem_hdr->application_restarts & VL_API_EPOCH_MASK));
+      return;
+    }
+
+  regpp = am->vl_clients + client_index;
+
+  if (!pool_is_free (am->vl_clients, regpp))
+    {
+      regp = *regpp;
+      svm = am->vlib_rp;
+
+      /* $$$ check the input queue for e.g. punted sf's */
+
+      rp = vl_msg_api_alloc (sizeof (*rp));
+      rp->_vl_msg_id = ntohs (VL_API_MEMCLNT_DELETE_REPLY);
+      rp->handle = mp->handle;
+      rp->response = 1;
+
+      vl_msg_api_send_shmem (regp->vl_input_queue, (u8 *) & rp);
+
+      if (client_index != regp->vl_api_registration_pool_index)
+	{
+	  clib_warning ("mismatch client_index %d pool_index %d",
+			client_index, regp->vl_api_registration_pool_index);
+	  vl_msg_api_free (rp);
+	  return;
+	}
+
+      /* No dangling references, please */
+      *regpp = 0;
+
+      pool_put_index (am->vl_clients, regp->vl_api_registration_pool_index);
+
+      pthread_mutex_lock (&svm->mutex);
+      oldheap = svm_push_data_heap (svm);
+      /* Poison the old registration */
+      memset (regp, 0xF1, sizeof (*regp));
+      clib_mem_free (regp);
+      pthread_mutex_unlock (&svm->mutex);
+      svm_pop_heap (oldheap);
+    }
+  else
+    {
+      clib_warning ("unknown client ID %d", mp->index);
+    }
+}
+
+void
+vl_api_get_first_msg_id_t_handler (vl_api_get_first_msg_id_t * mp)
+{
+  vl_api_get_first_msg_id_reply_t *rmp;
+  unix_shared_memory_queue_t *q;
+  uword *p;
+  api_main_t *am = &api_main;
+  vl_api_msg_range_t *rp;
+  u8 name[64];
+  u16 first_msg_id = ~0;
+  int rv = -7;			/* VNET_API_ERROR_INVALID_VALUE */
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (!q)
+    return;
+
+  if (am->msg_range_by_name == 0)
+    goto out;
+
+  strncpy ((char *) name, (char *) mp->name, ARRAY_LEN (name) - 1);
+
+  p = hash_get_mem (am->msg_range_by_name, name);
+  if (p == 0)
+    goto out;
+
+  rp = vec_elt_at_index (am->msg_ranges, p[0]);
+
+  first_msg_id = rp->first_msg_id;
+  rv = 0;
+
+out:
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_GET_FIRST_MSG_ID_REPLY);
+  rmp->context = mp->context;
+  rmp->retval = ntohl (rv);
+  rmp->first_msg_id = ntohs (first_msg_id);
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+#define foreach_vlib_api_msg                    \
+_(MEMCLNT_CREATE, memclnt_create)               \
+_(MEMCLNT_DELETE, memclnt_delete)               \
+_(GET_FIRST_MSG_ID, get_first_msg_id)
+
+/*
+ * vl_api_init
+ */
+static int
+memory_api_init (char *region_name)
+{
+  int rv;
+  vl_msg_api_msg_config_t cfg;
+  vl_msg_api_msg_config_t *c = &cfg;
+
+  if ((rv = vl_map_shmem (region_name, 1 /* is_vlib */ )) < 0)
+    return rv;
+
+#define _(N,n) do {                                             \
+    c->id = VL_API_##N;                                         \
+    c->name = #n;                                               \
+    c->handler = vl_api_##n##_t_handler;                        \
+    c->cleanup = vl_noop_handler;                               \
+    c->endian = vl_api_##n##_t_endian;                          \
+    c->print = vl_api_##n##_t_print;                            \
+    c->size = sizeof(vl_api_##n##_t);                           \
+    c->traced = 1; /* trace, so these msgs print */             \
+    c->replay = 0; /* don't replay client create/delete msgs */ \
+    vl_msg_api_config(c);} while (0);
+
+  foreach_vlib_api_msg;
+#undef _
+
+  return 0;
+}
+
+#define foreach_histogram_bucket                \
+_(400)                                          \
+_(200)                                          \
+_(100)                                          \
+_(10)
+
+typedef enum
+{
+#define _(n) SLEEP_##n##_US,
+  foreach_histogram_bucket
+#undef _
+    SLEEP_N_BUCKETS,
+} histogram_index_t;
+
+static u64 vector_rate_histogram[SLEEP_N_BUCKETS];
+
+static void memclnt_queue_callback (vlib_main_t * vm);
+
+static uword
+memclnt_process (vlib_main_t * vm,
+		 vlib_node_runtime_t * node, vlib_frame_t * f)
+{
+  uword mp;
+  vl_shmem_hdr_t *shm;
+  unix_shared_memory_queue_t *q;
+  clib_error_t *e;
+  int rv;
+  api_main_t *am = &api_main;
+  f64 dead_client_scan_time;
+  f64 sleep_time, start_time;
+  f64 vector_rate;
+
+  vlib_set_queue_signal_callback (vm, memclnt_queue_callback);
+
+  if ((rv = memory_api_init (am->region_name)) < 0)
+    {
+      clib_warning ("memory_api_init returned %d, wait for godot...", rv);
+      vlib_process_suspend (vm, 1e70);
+    }
+
+  shm = am->shmem_hdr;
+  ASSERT (shm);
+  q = shm->vl_input_queue;
+  ASSERT (q);
+
+  e = vlib_call_init_exit_functions
+    (vm, vm->api_init_function_registrations, 1 /* call_once */ );
+  if (e)
+    clib_error_report (e);
+
+  sleep_time = 20.0;
+  dead_client_scan_time = vlib_time_now (vm) + 20.0;
+
+  /* $$$ pay attention to frame size, control CPU usage */
+  while (1)
+    {
+      uword event_type __attribute__ ((unused));
+      i8 *headp;
+      int need_broadcast;
+
+      /*
+       * There's a reason for checking the queue before
+       * sleeping. If the vlib application crashes, it's entirely
+       * possible for a client to enqueue a connect request
+       * during the process restart interval.
+       *
+       * Unless some force of physics causes the new incarnation
+       * of the application to process the request, the client will
+       * sit and wait for Godot...
+       */
+      vector_rate = vlib_last_vector_length_per_node (vm);
+      start_time = vlib_time_now (vm);
+      while (1)
+	{
+	  pthread_mutex_lock (&q->mutex);
+	  if (q->cursize == 0)
+	    {
+	      vm->api_queue_nonempty = 0;
+	      pthread_mutex_unlock (&q->mutex);
+
+	      if (TRACE_VLIB_MEMORY_QUEUE)
+		{
+                  /* *INDENT-OFF* */
+                  ELOG_TYPE_DECLARE (e) =
+                    {
+                      .format = "q-underflow: len %d",
+                      .format_args = "i4",
+                    };
+                  /* *INDENT-ON* */
+		  struct
+		  {
+		    u32 len;
+		  } *ed;
+		  ed = ELOG_DATA (&vm->elog_main, e);
+		  ed->len = 0;
+		}
+	      sleep_time = 20.0;
+	      break;
+	    }
+
+	  headp = (i8 *) (q->data + sizeof (uword) * q->head);
+	  clib_memcpy (&mp, headp, sizeof (uword));
+
+	  q->head++;
+	  need_broadcast = (q->cursize == q->maxsize / 2);
+	  q->cursize--;
+
+	  if (PREDICT_FALSE (q->head == q->maxsize))
+	    q->head = 0;
+	  pthread_mutex_unlock (&q->mutex);
+	  if (need_broadcast)
+	    (void) pthread_cond_broadcast (&q->condvar);
+
+	  vl_msg_api_handler_with_vm_node (am, (void *) mp, vm, node);
+
+	  /* Allow no more than 10us without a pause */
+	  if (vlib_time_now (vm) > start_time + 10e-6)
+	    {
+	      int index = SLEEP_400_US;
+	      if (vector_rate > 40.0)
+		sleep_time = 400e-6;
+	      else if (vector_rate > 20.0)
+		{
+		  index = SLEEP_200_US;
+		  sleep_time = 200e-6;
+		}
+	      else if (vector_rate >= 1.0)
+		{
+		  index = SLEEP_100_US;
+		  sleep_time = 100e-6;
+		}
+	      else
+		{
+		  index = SLEEP_10_US;
+		  sleep_time = 10e-6;
+		}
+	      vector_rate_histogram[index] += 1;
+	      break;
+	    }
+	}
+
+      event_type = vlib_process_wait_for_event_or_clock (vm, sleep_time);
+      vm->queue_signal_pending = 0;
+      vlib_process_get_events (vm, 0 /* event_data */ );
+
+      if (vlib_time_now (vm) > dead_client_scan_time)
+	{
+	  vl_api_registration_t **regpp;
+	  vl_api_registration_t *regp;
+	  unix_shared_memory_queue_t *q;
+	  static u32 *dead_indices;
+	  static u32 *confused_indices;
+
+	  vec_reset_length (dead_indices);
+	  vec_reset_length (confused_indices);
+
+          /* *INDENT-OFF* */
+          pool_foreach (regpp, am->vl_clients,
+          ({
+            regp = *regpp;
+            if (regp)
+              {
+                q = regp->vl_input_queue;
+                if (kill (q->consumer_pid, 0) < 0)
+                  {
+                    vec_add1(dead_indices, regpp - am->vl_clients);
+                  }
+              }
+            else
+              {
+                clib_warning ("NULL client registration index %d",
+                              regpp - am->vl_clients);
+                vec_add1 (confused_indices, regpp - am->vl_clients);
+              }
+          }));
+          /* *INDENT-ON* */
+	  /* This should "never happen," but if it does, fix it... */
+	  if (PREDICT_FALSE (vec_len (confused_indices) > 0))
+	    {
+	      int i;
+	      for (i = 0; i < vec_len (confused_indices); i++)
+		{
+		  pool_put_index (am->vl_clients, confused_indices[i]);
+		}
+	    }
+
+	  if (PREDICT_FALSE (vec_len (dead_indices) > 0))
+	    {
+	      int i;
+	      svm_region_t *svm;
+	      void *oldheap;
+
+	      /* Allow the application to clean up its registrations */
+	      for (i = 0; i < vec_len (dead_indices); i++)
+		{
+		  regpp = pool_elt_at_index (am->vl_clients, dead_indices[i]);
+		  if (regpp)
+		    {
+		      u32 handle;
+
+		      handle = vl_msg_api_handle_from_index_and_epoch
+			(dead_indices[i], shm->application_restarts);
+		      (void) vl_api_memclnt_delete_callback (handle);
+		    }
+		}
+
+	      svm = am->vlib_rp;
+	      pthread_mutex_lock (&svm->mutex);
+	      oldheap = svm_push_data_heap (svm);
+
+	      for (i = 0; i < vec_len (dead_indices); i++)
+		{
+		  regpp = pool_elt_at_index (am->vl_clients, dead_indices[i]);
+		  if (regpp)
+		    {
+		      /* Poison the old registration */
+		      memset (*regpp, 0xF3, sizeof (**regpp));
+		      clib_mem_free (*regpp);
+		      /* no dangling references, please */
+		      *regpp = 0;
+		    }
+		  else
+		    {
+		      svm_pop_heap (oldheap);
+		      clib_warning ("Duplicate free, client index %d",
+				    regpp - am->vl_clients);
+		      oldheap = svm_push_data_heap (svm);
+		    }
+		}
+
+	      svm_client_scan_this_region_nolock (am->vlib_rp);
+
+	      pthread_mutex_unlock (&svm->mutex);
+	      svm_pop_heap (oldheap);
+	      for (i = 0; i < vec_len (dead_indices); i++)
+		pool_put_index (am->vl_clients, dead_indices[i]);
+	    }
+
+	  dead_client_scan_time = vlib_time_now (vm) + 20.0;
+	}
+
+      if (TRACE_VLIB_MEMORY_QUEUE)
+	{
+          /* *INDENT-OFF* */
+          ELOG_TYPE_DECLARE (e) = {
+            .format = "q-awake: len %d",
+            .format_args = "i4",
+          };
+          /* *INDENT-ON* */
+	  struct
+	  {
+	    u32 len;
+	  } *ed;
+	  ed = ELOG_DATA (&vm->elog_main, e);
+	  ed->len = q->cursize;
+	}
+    }
+
+  return 0;
+}
+
+static clib_error_t *
+vl_api_show_histogram_command (vlib_main_t * vm,
+			       unformat_input_t * input,
+			       vlib_cli_command_t * cli_cmd)
+{
+  u64 total_counts = 0;
+  int i;
+
+  for (i = 0; i < SLEEP_N_BUCKETS; i++)
+    {
+      total_counts += vector_rate_histogram[i];
+    }
+
+  if (total_counts == 0)
+    {
+      vlib_cli_output (vm, "No control-plane activity.");
+      return 0;
+    }
+
+#define _(n)                                                    \
+    do {                                                        \
+        f64 percent;                                            \
+        percent = ((f64) vector_rate_histogram[SLEEP_##n##_US]) \
+            / (f64) total_counts;                               \
+        percent *= 100.0;                                       \
+        vlib_cli_output (vm, "Sleep %3d us: %llu, %.2f%%",n,    \
+                         vector_rate_histogram[SLEEP_##n##_US], \
+                         percent);                              \
+    } while (0);
+  foreach_histogram_bucket;
+#undef _
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_api_histogram_command, static) = {
+    .path = "show api histogram",
+    .short_help = "show api histogram",
+    .function = vl_api_show_histogram_command,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+vl_api_clear_histogram_command (vlib_main_t * vm,
+				unformat_input_t * input,
+				vlib_cli_command_t * cli_cmd)
+{
+  int i;
+
+  for (i = 0; i < SLEEP_N_BUCKETS; i++)
+    vector_rate_histogram[i] = 0;
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_clear_api_histogram_command, static) = {
+    .path = "clear api histogram",
+    .short_help = "clear api histogram",
+    .function = vl_api_clear_histogram_command,
+};
+/* *INDENT-ON* */
+
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (memclnt_node,static) = {
+    .function = memclnt_process,
+    .type = VLIB_NODE_TYPE_PROCESS,
+    .name = "api-rx-from-ring",
+    .state = VLIB_NODE_STATE_DISABLED,
+};
+/* *INDENT-ON* */
+
+static void
+memclnt_queue_callback (vlib_main_t * vm)
+{
+  static volatile int *cursizep;
+
+  if (PREDICT_FALSE (cursizep == 0))
+    {
+      api_main_t *am = &api_main;
+      vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;
+      unix_shared_memory_queue_t *q;
+
+      if (shmem_hdr == 0)
+	return;
+
+      q = shmem_hdr->vl_input_queue;
+      if (q == 0)
+	return;
+      cursizep = &q->cursize;
+    }
+
+  if (*cursizep >= 1)
+    {
+      vm->queue_signal_pending = 1;
+      vm->api_queue_nonempty = 1;
+      vlib_process_signal_event (vm, memclnt_node.index,
+				 /* event_type */ 0, /* event_data */ 0);
+    }
+}
+
+void
+vl_enable_disable_memory_api (vlib_main_t * vm, int enable)
+{
+  vlib_node_set_state (vm, memclnt_node.index,
+		       (enable
+			? VLIB_NODE_STATE_POLLING
+			: VLIB_NODE_STATE_DISABLED));
+}
+
+static uword
+api_rx_from_node (vlib_main_t * vm,
+		  vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  uword n_packets = frame->n_vectors;
+  uword n_left_from;
+  u32 *from;
+  static u8 *long_msg;
+
+  vec_validate (long_msg, 4095);
+  n_left_from = frame->n_vectors;
+  from = vlib_frame_args (frame);
+
+  while (n_left_from > 0)
+    {
+      u32 bi0;
+      vlib_buffer_t *b0;
+      void *msg;
+      uword msg_len;
+
+      bi0 = from[0];
+      b0 = vlib_get_buffer (vm, bi0);
+      from += 1;
+      n_left_from -= 1;
+
+      msg = b0->data + b0->current_data;
+      msg_len = b0->current_length;
+      if (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
+	{
+	  ASSERT (long_msg != 0);
+	  _vec_len (long_msg) = 0;
+	  vec_add (long_msg, msg, msg_len);
+	  while (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
+	    {
+	      b0 = vlib_get_buffer (vm, b0->next_buffer);
+	      msg = b0->data + b0->current_data;
+	      msg_len = b0->current_length;
+	      vec_add (long_msg, msg, msg_len);
+	    }
+	  msg = long_msg;
+	}
+      vl_msg_api_handler_no_trace_no_free (msg);
+    }
+
+  /* Free what we've been given. */
+  vlib_buffer_free (vm, vlib_frame_args (frame), n_packets);
+
+  return n_packets;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (api_rx_from_node_node,static) = {
+    .function = api_rx_from_node,
+    .type = VLIB_NODE_TYPE_INTERNAL,
+    .vector_size = 4,
+    .name = "api-rx-from-node",
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+setup_memclnt_exit (vlib_main_t * vm)
+{
+  atexit (vl_unmap_shmem);
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (setup_memclnt_exit);
+
+
+static clib_error_t *
+vl_api_ring_command (vlib_main_t * vm,
+		     unformat_input_t * input, vlib_cli_command_t * cli_cmd)
+{
+  int i;
+  ring_alloc_t *ap;
+  vl_shmem_hdr_t *shmem_hdr;
+  api_main_t *am = &api_main;
+
+  shmem_hdr = am->shmem_hdr;
+
+  if (shmem_hdr == 0)
+    {
+      vlib_cli_output (vm, "Shared memory segment not initialized...\n");
+      return 0;
+    }
+
+  vlib_cli_output (vm, "%8s %8s %8s %8s %8s\n",
+		   "Owner", "Size", "Nitems", "Hits", "Misses");
+
+  ap = shmem_hdr->vl_rings;
+
+  for (i = 0; i < vec_len (shmem_hdr->vl_rings); i++)
+    {
+      vlib_cli_output (vm, "%8s %8d %8d %8d %8d\n",
+		       "vlib", ap->size, ap->nitems, ap->hits, ap->misses);
+      ap++;
+    }
+
+  ap = shmem_hdr->client_rings;
+
+  for (i = 0; i < vec_len (shmem_hdr->client_rings); i++)
+    {
+      vlib_cli_output (vm, "%8s %8d %8d %8d %8d\n",
+		       "clnt", ap->size, ap->nitems, ap->hits, ap->misses);
+      ap++;
+    }
+
+  vlib_cli_output (vm, "%d ring miss fallback allocations\n",
+		   am->ring_misses);
+
+  vlib_cli_output (vm, "%d application restarts, %d reclaimed msgs\n",
+		   shmem_hdr->application_restarts,
+		   shmem_hdr->restart_reclaims);
+  return 0;
+}
+
+void dump_socket_clients (vlib_main_t * vm, api_main_t * am)
+  __attribute__ ((weak));
+
+void
+dump_socket_clients (vlib_main_t * vm, api_main_t * am)
+{
+}
+
+static clib_error_t *
+vl_api_client_command (vlib_main_t * vm,
+		       unformat_input_t * input, vlib_cli_command_t * cli_cmd)
+{
+  vl_api_registration_t **regpp, *regp;
+  unix_shared_memory_queue_t *q;
+  char *health;
+  api_main_t *am = &api_main;
+  u32 *confused_indices = 0;
+
+  if (!pool_elts (am->vl_clients))
+    goto socket_clients;
+  vlib_cli_output (vm, "Shared memory clients");
+  vlib_cli_output (vm, "%16s %8s %14s %18s %s",
+		   "Name", "PID", "Queue Length", "Queue VA", "Health");
+
+  /* *INDENT-OFF* */
+  pool_foreach (regpp, am->vl_clients,
+  ({
+    regp = *regpp;
+
+    if (regp)
+      {
+        q = regp->vl_input_queue;
+        if (kill (q->consumer_pid, 0) < 0)
+          {
+            health = "DEAD";
+          }
+        else
+          {
+            health = "alive";
+          }
+        vlib_cli_output (vm, "%16s %8d %14d 0x%016llx %s\n",
+                         regp->name, q->consumer_pid, q->cursize,
+                         q, health);
+      }
+    else
+      {
+        clib_warning ("NULL client registration index %d",
+                      regpp - am->vl_clients);
+        vec_add1 (confused_indices, regpp - am->vl_clients);
+      }
+  }));
+  /* *INDENT-ON* */
+
+  /* This should "never happen," but if it does, fix it... */
+  if (PREDICT_FALSE (vec_len (confused_indices) > 0))
+    {
+      int i;
+      for (i = 0; i < vec_len (confused_indices); i++)
+	{
+	  pool_put_index (am->vl_clients, confused_indices[i]);
+	}
+    }
+  vec_free (confused_indices);
+
+  if (am->missing_clients)
+    vlib_cli_output (vm, "%u messages with missing clients",
+		     am->missing_clients);
+socket_clients:
+  dump_socket_clients (vm, am);
+
+  return 0;
+}
+
+static clib_error_t *
+vl_api_status_command (vlib_main_t * vm,
+		       unformat_input_t * input, vlib_cli_command_t * cli_cmd)
+{
+  api_main_t *am = &api_main;
+
+  // check if rx_trace and tx_trace are not null pointers
+
+  if (am->rx_trace == 0)
+    {
+      vlib_cli_output (vm, "RX Trace disabled\n");
+    }
+  else
+    {
+      if (am->rx_trace->enabled == 0)
+	vlib_cli_output (vm, "RX Trace disabled\n");
+      else
+	vlib_cli_output (vm, "RX Trace enabled\n");
+    }
+
+  if (am->tx_trace == 0)
+    {
+      vlib_cli_output (vm, "TX Trace disabled\n");
+    }
+  else
+    {
+      if (am->tx_trace->enabled == 0)
+	vlib_cli_output (vm, "TX Trace disabled\n");
+      else
+	vlib_cli_output (vm, "TX Trace enabled\n");
+    }
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_api_command, static) = {
+    .path = "show api",
+    .short_help = "Show API information",
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_api_ring_command, static) = {
+    .path = "show api ring-stats",
+    .short_help = "Message ring statistics",
+    .function = vl_api_ring_command,
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_api_clients_command, static) = {
+    .path = "show api clients",
+    .short_help = "Client information",
+    .function = vl_api_client_command,
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_api_status_command, static) = {
+    .path = "show api status",
+    .short_help = "Show API trace status",
+    .function = vl_api_status_command,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+vl_api_message_table_command (vlib_main_t * vm,
+			      unformat_input_t * input,
+			      vlib_cli_command_t * cli_cmd)
+{
+  api_main_t *am = &api_main;
+  int i;
+  int verbose = 0;
+
+  if (unformat (input, "verbose"))
+    verbose = 1;
+
+
+  if (verbose == 0)
+    vlib_cli_output (vm, "%-4s %s", "ID", "Name");
+  else
+    vlib_cli_output (vm, "%-4s %-40s %6s %7s", "ID", "Name", "Bounce",
+		     "MP-safe");
+
+  for (i = 1; i < vec_len (am->msg_names); i++)
+    {
+      if (verbose == 0)
+	{
+	  vlib_cli_output (vm, "%-4d %s", i,
+			   am->msg_names[i] ? am->msg_names[i] :
+			   "  [no handler]");
+	}
+      else
+	{
+	  vlib_cli_output (vm, "%-4d %-40s %6d %7d", i,
+			   am->msg_names[i] ? am->msg_names[i] :
+			   "  [no handler]", am->message_bounce[i],
+			   am->is_mp_safe[i]);
+	}
+    }
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_api_message_table_command, static) = {
+    .path = "show api message-table",
+    .short_help = "Message Table",
+    .function = vl_api_message_table_command,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+vl_api_trace_command (vlib_main_t * vm,
+		      unformat_input_t * input, vlib_cli_command_t * cli_cmd)
+{
+  u32 nitems = 1024;
+  vl_api_trace_which_t which = VL_API_TRACE_RX;
+  api_main_t *am = &api_main;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "rx nitems %u", &nitems) || unformat (input, "rx"))
+	goto configure;
+      else if (unformat (input, "tx nitems %u", &nitems)
+	       || unformat (input, "tx"))
+	{
+	  which = VL_API_TRACE_RX;
+	  goto configure;
+	}
+      else if (unformat (input, "on rx"))
+	{
+	  vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 1);
+	}
+      else if (unformat (input, "on tx"))
+	{
+	  vl_msg_api_trace_onoff (am, VL_API_TRACE_TX, 1);
+	}
+      else if (unformat (input, "on"))
+	{
+	  vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 1);
+	}
+      else if (unformat (input, "off"))
+	{
+	  vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 0);
+	  vl_msg_api_trace_onoff (am, VL_API_TRACE_TX, 0);
+	}
+      else if (unformat (input, "free"))
+	{
+	  vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 0);
+	  vl_msg_api_trace_onoff (am, VL_API_TRACE_TX, 0);
+	  vl_msg_api_trace_free (am, VL_API_TRACE_RX);
+	  vl_msg_api_trace_free (am, VL_API_TRACE_TX);
+	}
+      else if (unformat (input, "debug on"))
+	{
+	  am->msg_print_flag = 1;
+	}
+      else if (unformat (input, "debug off"))
+	{
+	  am->msg_print_flag = 0;
+	}
+      else
+	return clib_error_return (0, "unknown input `%U'",
+				  format_unformat_error, input);
+    }
+  return 0;
+
+configure:
+  if (vl_msg_api_trace_configure (am, which, nitems))
+    {
+      vlib_cli_output (vm, "warning: trace configure error (%d, %d)",
+		       which, nitems);
+    }
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (trace, static) = {
+    .path = "set api-trace",
+    .short_help = "API trace",
+    .function = vl_api_trace_command,
+};
+/* *INDENT-ON* */
+
+clib_error_t *
+vlibmemory_init (vlib_main_t * vm)
+{
+  api_main_t *am = &api_main;
+  svm_map_region_args_t _a, *a = &_a;
+
+  memset (a, 0, sizeof (*a));
+  a->root_path = am->root_path;
+  a->name = SVM_GLOBAL_REGION_NAME;
+  a->baseva = (am->global_baseva != 0) ?
+    am->global_baseva : SVM_GLOBAL_REGION_BASEVA;
+  a->size = (am->global_size != 0) ? am->global_size : SVM_GLOBAL_REGION_SIZE;
+  a->flags = SVM_FLAGS_NODATA;
+  a->uid = am->api_uid;
+  a->gid = am->api_gid;
+  a->pvt_heap_size =
+    (am->global_pvt_heap_size !=
+     0) ? am->global_pvt_heap_size : SVM_PVT_MHEAP_SIZE;
+
+  svm_region_init_args (a);
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (vlibmemory_init);
+
+void
+vl_set_memory_region_name (char *name)
+{
+  api_main_t *am = &api_main;
+
+  am->region_name = name;
+}
+
+static int
+range_compare (vl_api_msg_range_t * a0, vl_api_msg_range_t * a1)
+{
+  int len0, len1, clen;
+
+  len0 = vec_len (a0->name);
+  len1 = vec_len (a1->name);
+  clen = len0 < len1 ? len0 : len1;
+  return (strncmp ((char *) a0->name, (char *) a1->name, clen));
+}
+
+static u8 *
+format_api_msg_range (u8 * s, va_list * args)
+{
+  vl_api_msg_range_t *rp = va_arg (*args, vl_api_msg_range_t *);
+
+  if (rp == 0)
+    s = format (s, "%-20s%9s%9s", "Name", "First-ID", "Last-ID");
+  else
+    s = format (s, "%-20s%9d%9d", rp->name, rp->first_msg_id,
+		rp->last_msg_id);
+
+  return s;
+}
+
+static clib_error_t *
+vl_api_show_plugin_command (vlib_main_t * vm,
+			    unformat_input_t * input,
+			    vlib_cli_command_t * cli_cmd)
+{
+  api_main_t *am = &api_main;
+  vl_api_msg_range_t *rp = 0;
+  int i;
+
+  if (vec_len (am->msg_ranges) == 0)
+    {
+      vlib_cli_output (vm, "No plugin API message ranges configured...");
+      return 0;
+    }
+
+  rp = vec_dup (am->msg_ranges);
+
+  vec_sort_with_function (rp, range_compare);
+
+  vlib_cli_output (vm, "Plugin API message ID ranges...\n");
+  vlib_cli_output (vm, "%U", format_api_msg_range, 0 /* header */ );
+
+  for (i = 0; i < vec_len (rp); i++)
+    vlib_cli_output (vm, "%U", format_api_msg_range, rp + i);
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_api_plugin_command, static) = {
+    .path = "show api plugin",
+    .short_help = "show api plugin",
+    .function = vl_api_show_plugin_command,
+};
+/* *INDENT-ON* */
+
+static void
+vl_api_rpc_call_t_handler (vl_api_rpc_call_t * mp)
+{
+  vl_api_rpc_reply_t *rmp;
+  int (*fp) (void *);
+  i32 rv = 0;
+  vlib_main_t *vm = vlib_get_main ();
+
+  if (mp->function == 0)
+    {
+      rv = -1;
+      clib_warning ("rpc NULL function pointer");
+    }
+
+  else
+    {
+      if (mp->need_barrier_sync)
+	vlib_worker_thread_barrier_sync (vm);
+
+      fp = uword_to_pointer (mp->function, int (*)(void *));
+      rv = fp (mp->data);
+
+      if (mp->need_barrier_sync)
+	vlib_worker_thread_barrier_release (vm);
+    }
+
+  if (mp->send_reply)
+    {
+      unix_shared_memory_queue_t *q =
+	vl_api_client_index_to_input_queue (mp->client_index);
+      if (q)
+	{
+	  rmp = vl_msg_api_alloc_as_if_client (sizeof (*rmp));
+	  rmp->_vl_msg_id = ntohs (VL_API_RPC_REPLY);
+	  rmp->context = mp->context;
+	  rmp->retval = rv;
+	  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+	}
+    }
+  if (mp->multicast)
+    {
+      clib_warning ("multicast not yet implemented...");
+    }
+}
+
+static void
+vl_api_rpc_reply_t_handler (vl_api_rpc_reply_t * mp)
+{
+  clib_warning ("unimplemented");
+}
+
+void
+vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length)
+{
+  vl_api_rpc_call_t *mp;
+  api_main_t *am = &api_main;
+  vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;
+  unix_shared_memory_queue_t *q;
+
+  /* Main thread: call the function directly */
+  if (os_get_cpu_number () == 0)
+    {
+      vlib_main_t *vm = vlib_get_main ();
+      void (*call_fp) (void *);
+
+      vlib_worker_thread_barrier_sync (vm);
+
+      call_fp = fp;
+      call_fp (data);
+
+      vlib_worker_thread_barrier_release (vm);
+      return;
+    }
+
+  /* Any other thread, actually do an RPC call... */
+  mp = vl_msg_api_alloc_as_if_client (sizeof (*mp) + data_length);
+
+  memset (mp, 0, sizeof (*mp));
+  clib_memcpy (mp->data, data, data_length);
+  mp->_vl_msg_id = ntohs (VL_API_RPC_CALL);
+  mp->function = pointer_to_uword (fp);
+  mp->need_barrier_sync = 1;
+
+  /*
+   * Use the "normal" control-plane mechanism for the main thread.
+   * Well, almost. if the main input queue is full, we cannot
+   * block. Otherwise, we can expect a barrier sync timeout.
+   */
+  q = shmem_hdr->vl_input_queue;
+
+  while (pthread_mutex_trylock (&q->mutex))
+    vlib_worker_thread_barrier_check ();
+
+  while (PREDICT_FALSE (unix_shared_memory_queue_is_full (q)))
+    {
+      pthread_mutex_unlock (&q->mutex);
+      vlib_worker_thread_barrier_check ();
+      while (pthread_mutex_trylock (&q->mutex))
+	vlib_worker_thread_barrier_check ();
+    }
+
+  vl_msg_api_send_shmem_nolock (q, (u8 *) & mp);
+
+  pthread_mutex_unlock (&q->mutex);
+}
+
+#define foreach_rpc_api_msg                     \
+_(RPC_CALL,rpc_call)                            \
+_(RPC_REPLY,rpc_reply)
+
+static clib_error_t *
+rpc_api_hookup (vlib_main_t * vm)
+{
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers(VL_API_##N, #n,                     \
+                           vl_api_##n##_t_handler,              \
+                           vl_noop_handler,                     \
+                           vl_noop_handler,			\
+                           vl_api_##n##_t_print,                \
+                           sizeof(vl_api_##n##_t), 0 /* do not trace */);
+  foreach_rpc_api_msg;
+#undef _
+  return 0;
+}
+
+VLIB_API_INIT_FUNCTION (rpc_api_hookup);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */