src/vlib/error.c - fdio/vpp - Gitiles

 /*
  * Copyright (c) 2015 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.
  */
 /*
  * error.c: VLIB error handler
  *
  * Copyright (c) 2008 Eliot Dresselhaus
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
  * "Software"), to deal in the Software without restriction, including
  * without limitation the rights to use, copy, modify, merge, publish,
  * distribute, sublicense, and/or sell copies of the Software, and to
  * permit persons to whom the Software is furnished to do so, subject to
  * the following conditions:
  *
  * The above copyright notice and this permission notice shall be
  * included in all copies or substantial portions of the Software.
  *
  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */

 #include <vlib/vlib.h>
 #include <vppinfra/heap.h>
 #include <vlib/stats/stats.h>

 uword
 vlib_error_drop_buffers (vlib_main_t * vm,
 			 vlib_node_runtime_t * node,
 			 u32 * buffers,
 			 u32 next_buffer_stride,
 			 u32 n_buffers,
 			 u32 next_index,
 			 u32 drop_error_node, u32 drop_error_code)
 {
   u32 n_left_this_frame, n_buffers_left, *args, n_args_left;
   vlib_error_t drop_error;
   vlib_node_t *n;

   n = vlib_get_node (vm, drop_error_node);
   drop_error = n->error_heap_index + drop_error_code;

   n_buffers_left = n_buffers;
   while (n_buffers_left > 0)
     {
       vlib_get_next_frame (vm, node, next_index, args, n_args_left);

       n_left_this_frame = clib_min (n_buffers_left, n_args_left);
       n_buffers_left -= n_left_this_frame;
       n_args_left -= n_left_this_frame;

       while (n_left_this_frame >= 4)
 	{
 	  u32 bi0, bi1, bi2, bi3;
 	  vlib_buffer_t *b0, *b1, *b2, *b3;

 	  args[0] = bi0 = buffers[0];
 	  args[1] = bi1 = buffers[1];
 	  args[2] = bi2 = buffers[2];
 	  args[3] = bi3 = buffers[3];

 	  b0 = vlib_get_buffer (vm, bi0);
 	  b1 = vlib_get_buffer (vm, bi1);
 	  b2 = vlib_get_buffer (vm, bi2);
 	  b3 = vlib_get_buffer (vm, bi3);

 	  b0->error = drop_error;
 	  b1->error = drop_error;
 	  b2->error = drop_error;
 	  b3->error = drop_error;

 	  buffers += 4;
 	  args += 4;
 	  n_left_this_frame -= 4;
 	}

       while (n_left_this_frame >= 1)
 	{
 	  u32 bi0;
 	  vlib_buffer_t *b0;

 	  args[0] = bi0 = buffers[0];

 	  b0 = vlib_get_buffer (vm, bi0);
 	  b0->error = drop_error;

 	  buffers += 1;
 	  args += 1;
 	  n_left_this_frame -= 1;
 	}

       vlib_put_next_frame (vm, node, next_index, n_args_left);
     }

   return n_buffers;
 }

 static u8 *
 format_stats_counter_name (u8 *s, va_list *va)
 {
   u8 *id = va_arg (*va, u8 *);

   for (u32 i = 0; id[i] != 0; i++)
     vec_add1 (s, id[i] == ' ' ? ' ' : id[i]);

   return s;
 }

 /* Reserves given number of error codes for given node. */
 void
 vlib_register_errors (vlib_main_t *vm, u32 node_index, u32 n_errors,
 		      char *error_strings[], vlib_error_desc_t counters[])
 {
   vlib_error_main_t *em = &vm->error_main;
   vlib_node_main_t *nm = &vm->node_main;
   vlib_node_t *n = vlib_get_node (vm, node_index);
   vlib_error_desc_t *cd;
   u32 n_threads = vlib_get_n_threads ();
   elog_event_type_t t = {};
   uword l;
   u64 **sc;

   ASSERT (vlib_get_thread_index () == 0);

   vlib_stats_segment_lock ();

   /* Free up any previous error strings. */
   if (n->n_errors > 0)
     {
       cd = vec_elt_at_index (em->counters_heap, n->error_heap_index);
       for (u32 i = 0; i < n->n_errors; i++)
 	vlib_stats_remove_entry (cd[i].stats_entry_index);
       heap_dealloc (em->counters_heap, n->error_heap_handle);
     }

   n->n_errors = n_errors;
   n->error_counters = counters;

   if (n_errors == 0)
     goto done;

   n->error_heap_index =
     heap_alloc (em->counters_heap, n_errors, n->error_heap_handle);
   l = vec_len (em->counters_heap);
   cd = vec_elt_at_index (em->counters_heap, n->error_heap_index);

   /*  Legacy node */
   if (!counters)
     {
       for (int i = 0; i < n_errors; i++)
 	{
 	  cd[i].name = error_strings[i];
 	  cd[i].desc = error_strings[i];
 	  cd[i].severity = VL_COUNTER_SEVERITY_ERROR;
 	}
     }
   else
     clib_memcpy (cd, counters, n_errors * sizeof (counters[0]));

   vec_validate (vm->error_elog_event_types, l - 1);

   if (em->stats_err_entry_index == 0)
     em->stats_err_entry_index = vlib_stats_add_counter_vector ("/node/errors");

   ASSERT (em->stats_err_entry_index != 0 && em->stats_err_entry_index != ~0);

   vlib_stats_validate (em->stats_err_entry_index, n_threads - 1, l - 1);
   sc = vlib_stats_get_entry_data_pointer (em->stats_err_entry_index);

   for (int i = 0; i < n_threads; i++)
     {
       vlib_main_t *tvm = vlib_get_main_by_index (i);
       vlib_error_main_t *tem = &tvm->error_main;
       tem->counters = sc[i];

       /* Zero counters for re-registrations of errors. */
       if (n->error_heap_index + n_errors <= vec_len (tem->counters_last_clear))
 	clib_memcpy (tem->counters + n->error_heap_index,
 		     tem->counters_last_clear + n->error_heap_index,
 		     n_errors * sizeof (tem->counters[0]));
       else
 	clib_memset (tem->counters + n->error_heap_index, 0,
 		     n_errors * sizeof (tem->counters[0]));
     }

   /* Register counter indices in the stat segment directory */
   for (int i = 0; i < n_errors; i++)
     cd[i].stats_entry_index = vlib_stats_add_symlink (
       em->stats_err_entry_index, n->error_heap_index + i, "/err/%v/%U",
       n->name, format_stats_counter_name, cd[i].name);

   vec_validate (nm->node_by_error, n->error_heap_index + n_errors - 1);

   for (u32 i = 0; i < n_errors; i++)
     {
       t.format = (char *) format (0, "%v %s: %%d", n->name, cd[i].name);
       vm->error_elog_event_types[n->error_heap_index + i] = t;
       nm->node_by_error[n->error_heap_index + i] = n->index;
     }

 done:
   vlib_stats_segment_unlock ();
 }

 uword
 unformat_vlib_error (unformat_input_t *input, va_list *args)
 {
   vlib_main_t *vm = va_arg (*args, vlib_main_t *);
   const vlib_error_main_t *em = &vm->error_main;
   vlib_error_t *error_index = va_arg (*args, vlib_error_t *);
   const vlib_node_t *node;
   char *error_name;
   u32 node_index;
   vlib_error_t i;

   if (!unformat (input, "%U.%s", unformat_vlib_node, vm, &node_index,
 		 &error_name))
     return 0;

   node = vlib_get_node (vm, node_index);
   for (i = 0; i < node->n_errors; i++)
     {
       vlib_error_t ei = node->error_heap_index + i;
       if (strcmp (em->counters_heap[ei].name, error_name) == 0)
 	{
 	  *error_index = ei;
 	  vec_free (error_name);
 	  return 1;
 	}
     }

   vec_free (error_name);
   return 0;
 }

 static char *
 sev2str (enum vl_counter_severity_e s)
 {
   switch (s)
     {
     case VL_COUNTER_SEVERITY_ERROR:
       return "error";
     case VL_COUNTER_SEVERITY_WARN:
       return "warn";
     case VL_COUNTER_SEVERITY_INFO:
       return "info";
     default:
       return "unknown";
     }
 }

 static clib_error_t *
 show_errors (vlib_main_t * vm,
 	     unformat_input_t * input, vlib_cli_command_t * cmd)
 {
   vlib_error_main_t *em = &vm->error_main;
   vlib_node_t *n;
   u32 code, i, ni;
   u64 c;
   int index = 0;
   int verbose = 0;
   u64 *sums = 0;

   if (unformat (input, "verbose %d", &verbose))
     ;
   else if (unformat (input, "verbose"))
     verbose = 1;

   vec_validate (sums, vec_len (em->counters));

   if (verbose)
     vlib_cli_output (vm, "%=10s%=35s%=35s%=10s%=6s", "Count", "Node",
 		     "Reason", "Severity", "Index");
   else
     vlib_cli_output (vm, "%=10s%=35s%=35s%=10s", "Count", "Node", "Reason",
 		     "Severity");

   foreach_vlib_main ()
     {
       em = &this_vlib_main->error_main;

       if (verbose)
 	vlib_cli_output (vm, "Thread %u (%v):", index,
 			 vlib_worker_threads[index].name);

       for (ni = 0; ni < vec_len (this_vlib_main->node_main.nodes); ni++)
 	{
 	  n = vlib_get_node (this_vlib_main, ni);
 	  for (code = 0; code < n->n_errors; code++)
 	    {
 	      i = n->error_heap_index + code;
 	      c = em->counters[i];
 	      if (i < vec_len (em->counters_last_clear))
 		c -= em->counters_last_clear[i];
 	      sums[i] += c;

 	      if (c == 0 && verbose < 2)
 		continue;

 	      if (verbose)
 		vlib_cli_output (vm, "%10lu%=35v%=35s%=10s%=6d", c, n->name,
 				 em->counters_heap[i].desc,
 				 sev2str (em->counters_heap[i].severity), i);
 	      else
 		vlib_cli_output (vm, "%10lu%=35v%=35s%=10s", c, n->name,
 				 em->counters_heap[i].desc,
 				 sev2str (em->counters_heap[i].severity));
 	    }
 	}
       index++;
     }

   if (verbose)
     vlib_cli_output (vm, "Total:");

   for (ni = 0; ni < vec_len (vm->node_main.nodes); ni++)
     {
       n = vlib_get_node (vm, ni);
       for (code = 0; code < n->n_errors; code++)
 	{
 	  i = n->error_heap_index + code;
 	  if (sums[i])
 	    {
 	      if (verbose)
 		vlib_cli_output (vm, "%10lu%=40v%=20s%=10d", sums[i], n->name,
 				 em->counters_heap[i].desc, i);
 	    }
 	}
     }

   vec_free (sums);

   return 0;
 }

 /* *INDENT-OFF* */
 VLIB_CLI_COMMAND (vlib_cli_show_errors) = {
   .path = "show errors",
   .short_help = "Show error counts",
   .function = show_errors,
 };
 /* *INDENT-ON* */

 /* *INDENT-OFF* */
 VLIB_CLI_COMMAND (cli_show_node_counters, static) = {
   .path = "show node counters",
   .short_help = "Show node counters",
   .function = show_errors,
 };
 /* *INDENT-ON* */

 static clib_error_t *
 clear_error_counters (vlib_main_t * vm,
 		      unformat_input_t * input, vlib_cli_command_t * cmd)
 {
   vlib_error_main_t *em;
   u32 i;

   foreach_vlib_main ()
     {
       em = &this_vlib_main->error_main;
       vec_validate (em->counters_last_clear, vec_len (em->counters) - 1);
       for (i = 0; i < vec_len (em->counters); i++)
 	em->counters_last_clear[i] = em->counters[i];
     }
   return 0;
 }

 /* *INDENT-OFF* */
 VLIB_CLI_COMMAND (cli_clear_error_counters, static) = {
   .path = "clear errors",
   .short_help = "Clear error counters",
   .function = clear_error_counters,
 };
 /* *INDENT-ON* */

 /* *INDENT-OFF* */
 VLIB_CLI_COMMAND (cli_clear_node_counters, static) = {
   .path = "clear node counters",
   .short_help = "Clear node counters",
   .function = clear_error_counters,
 };
 /* *INDENT-ON* */

 /*
  * fd.io coding-style-patch-verification: ON
  *
  * Local Variables:
  * eval: (c-set-style "gnu")
  * End:
  */
	/*
	* Copyright (c) 2015 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.
	*/
	/*
	* error.c: VLIB error handler
	*
	* Copyright (c) 2008 Eliot Dresselhaus
	*
	* Permission is hereby granted, free of charge, to any person obtaining
	* a copy of this software and associated documentation files (the
	* "Software"), to deal in the Software without restriction, including
	* without limitation the rights to use, copy, modify, merge, publish,
	* distribute, sublicense, and/or sell copies of the Software, and to
	* permit persons to whom the Software is furnished to do so, subject to
	* the following conditions:
	*
	* The above copyright notice and this permission notice shall be
	* included in all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
	* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
	* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
	* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	*/

	#include <vlib/vlib.h>
	#include <vppinfra/heap.h>
	#include <vlib/stats/stats.h>

	uword
	vlib_error_drop_buffers (vlib_main_t * vm,
	vlib_node_runtime_t * node,
	u32 * buffers,
	u32 next_buffer_stride,
	u32 n_buffers,
	u32 next_index,
	u32 drop_error_node, u32 drop_error_code)
	{
	u32 n_left_this_frame, n_buffers_left, *args, n_args_left;
	vlib_error_t drop_error;
	vlib_node_t *n;

	n = vlib_get_node (vm, drop_error_node);
	drop_error = n->error_heap_index + drop_error_code;

	n_buffers_left = n_buffers;
	while (n_buffers_left > 0)
	{
	vlib_get_next_frame (vm, node, next_index, args, n_args_left);

	n_left_this_frame = clib_min (n_buffers_left, n_args_left);
	n_buffers_left -= n_left_this_frame;
	n_args_left -= n_left_this_frame;

	while (n_left_this_frame >= 4)
	{
	u32 bi0, bi1, bi2, bi3;
	vlib_buffer_t b0, b1, b2, b3;

	args[0] = bi0 = buffers[0];
	args[1] = bi1 = buffers[1];
	args[2] = bi2 = buffers[2];
	args[3] = bi3 = buffers[3];

	b0 = vlib_get_buffer (vm, bi0);
	b1 = vlib_get_buffer (vm, bi1);
	b2 = vlib_get_buffer (vm, bi2);
	b3 = vlib_get_buffer (vm, bi3);

	b0->error = drop_error;
	b1->error = drop_error;
	b2->error = drop_error;
	b3->error = drop_error;

	buffers += 4;
	args += 4;
	n_left_this_frame -= 4;
	}

	while (n_left_this_frame >= 1)
	{
	u32 bi0;
	vlib_buffer_t *b0;

	args[0] = bi0 = buffers[0];

	b0 = vlib_get_buffer (vm, bi0);
	b0->error = drop_error;

	buffers += 1;
	args += 1;
	n_left_this_frame -= 1;
	}

	vlib_put_next_frame (vm, node, next_index, n_args_left);
	}

	return n_buffers;
	}

	static u8 *
	format_stats_counter_name (u8 s, va_list va)
	{
	u8 id = va_arg (va, u8 *);

	for (u32 i = 0; id[i] != 0; i++)
	vec_add1 (s, id[i] == ' ' ? ' ' : id[i]);

	return s;
	}

	/* Reserves given number of error codes for given node. */
	void
	vlib_register_errors (vlib_main_t *vm, u32 node_index, u32 n_errors,
	char *error_strings[], vlib_error_desc_t counters[])
	{
	vlib_error_main_t *em = &vm->error_main;
	vlib_node_main_t *nm = &vm->node_main;
	vlib_node_t *n = vlib_get_node (vm, node_index);
	vlib_error_desc_t *cd;
	u32 n_threads = vlib_get_n_threads ();
	elog_event_type_t t = {};
	uword l;
	u64 **sc;

	ASSERT (vlib_get_thread_index () == 0);

	vlib_stats_segment_lock ();

	/* Free up any previous error strings. */
	if (n->n_errors > 0)
	{
	cd = vec_elt_at_index (em->counters_heap, n->error_heap_index);
	for (u32 i = 0; i < n->n_errors; i++)
	vlib_stats_remove_entry (cd[i].stats_entry_index);
	heap_dealloc (em->counters_heap, n->error_heap_handle);
	}

	n->n_errors = n_errors;
	n->error_counters = counters;

	if (n_errors == 0)
	goto done;

	n->error_heap_index =
	heap_alloc (em->counters_heap, n_errors, n->error_heap_handle);
	l = vec_len (em->counters_heap);
	cd = vec_elt_at_index (em->counters_heap, n->error_heap_index);

	/* Legacy node */
	if (!counters)
	{
	for (int i = 0; i < n_errors; i++)
	{
	cd[i].name = error_strings[i];
	cd[i].desc = error_strings[i];
	cd[i].severity = VL_COUNTER_SEVERITY_ERROR;
	}
	}
	else
	clib_memcpy (cd, counters, n_errors * sizeof (counters[0]));

	vec_validate (vm->error_elog_event_types, l - 1);

	if (em->stats_err_entry_index == 0)
	em->stats_err_entry_index = vlib_stats_add_counter_vector ("/node/errors");

	ASSERT (em->stats_err_entry_index != 0 && em->stats_err_entry_index != ~0);

	vlib_stats_validate (em->stats_err_entry_index, n_threads - 1, l - 1);
	sc = vlib_stats_get_entry_data_pointer (em->stats_err_entry_index);

	for (int i = 0; i < n_threads; i++)
	{
	vlib_main_t *tvm = vlib_get_main_by_index (i);
	vlib_error_main_t *tem = &tvm->error_main;
	tem->counters = sc[i];

	/* Zero counters for re-registrations of errors. */
	if (n->error_heap_index + n_errors <= vec_len (tem->counters_last_clear))
	clib_memcpy (tem->counters + n->error_heap_index,
	tem->counters_last_clear + n->error_heap_index,
	n_errors * sizeof (tem->counters[0]));
	else
	clib_memset (tem->counters + n->error_heap_index, 0,
	n_errors * sizeof (tem->counters[0]));
	}

	/* Register counter indices in the stat segment directory */
	for (int i = 0; i < n_errors; i++)
	cd[i].stats_entry_index = vlib_stats_add_symlink (
	em->stats_err_entry_index, n->error_heap_index + i, "/err/%v/%U",
	n->name, format_stats_counter_name, cd[i].name);

	vec_validate (nm->node_by_error, n->error_heap_index + n_errors - 1);

	for (u32 i = 0; i < n_errors; i++)
	{
	t.format = (char *) format (0, "%v %s: %%d", n->name, cd[i].name);
	vm->error_elog_event_types[n->error_heap_index + i] = t;
	nm->node_by_error[n->error_heap_index + i] = n->index;
	}

	done:
	vlib_stats_segment_unlock ();
	}

	uword
	unformat_vlib_error (unformat_input_t input, va_list args)
	{
	vlib_main_t vm = va_arg (args, vlib_main_t *);
	const vlib_error_main_t *em = &vm->error_main;
	vlib_error_t error_index = va_arg (args, vlib_error_t *);
	const vlib_node_t *node;
	char *error_name;
	u32 node_index;
	vlib_error_t i;

	if (!unformat (input, "%U.%s", unformat_vlib_node, vm, &node_index,
	&error_name))
	return 0;

	node = vlib_get_node (vm, node_index);
	for (i = 0; i < node->n_errors; i++)
	{
	vlib_error_t ei = node->error_heap_index + i;
	if (strcmp (em->counters_heap[ei].name, error_name) == 0)
	{
	*error_index = ei;
	vec_free (error_name);
	return 1;
	}
	}

	vec_free (error_name);
	return 0;
	}

	static char *
	sev2str (enum vl_counter_severity_e s)
	{
	switch (s)
	{
	case VL_COUNTER_SEVERITY_ERROR:
	return "error";
	case VL_COUNTER_SEVERITY_WARN:
	return "warn";
	case VL_COUNTER_SEVERITY_INFO:
	return "info";
	default:
	return "unknown";
	}
	}

	static clib_error_t *
	show_errors (vlib_main_t * vm,
	unformat_input_t * input, vlib_cli_command_t * cmd)
	{
	vlib_error_main_t *em = &vm->error_main;
	vlib_node_t *n;
	u32 code, i, ni;
	u64 c;
	int index = 0;
	int verbose = 0;
	u64 *sums = 0;

	if (unformat (input, "verbose %d", &verbose))
	;
	else if (unformat (input, "verbose"))
	verbose = 1;

	vec_validate (sums, vec_len (em->counters));

	if (verbose)
	vlib_cli_output (vm, "%=10s%=35s%=35s%=10s%=6s", "Count", "Node",
	"Reason", "Severity", "Index");
	else
	vlib_cli_output (vm, "%=10s%=35s%=35s%=10s", "Count", "Node", "Reason",
	"Severity");

	foreach_vlib_main ()
	{
	em = &this_vlib_main->error_main;

	if (verbose)
	vlib_cli_output (vm, "Thread %u (%v):", index,
	vlib_worker_threads[index].name);

	for (ni = 0; ni < vec_len (this_vlib_main->node_main.nodes); ni++)
	{
	n = vlib_get_node (this_vlib_main, ni);
	for (code = 0; code < n->n_errors; code++)
	{
	i = n->error_heap_index + code;
	c = em->counters[i];
	if (i < vec_len (em->counters_last_clear))
	c -= em->counters_last_clear[i];
	sums[i] += c;

	if (c == 0 && verbose < 2)
	continue;

	if (verbose)
	vlib_cli_output (vm, "%10lu%=35v%=35s%=10s%=6d", c, n->name,
	em->counters_heap[i].desc,
	sev2str (em->counters_heap[i].severity), i);
	else
	vlib_cli_output (vm, "%10lu%=35v%=35s%=10s", c, n->name,
	em->counters_heap[i].desc,
	sev2str (em->counters_heap[i].severity));
	}
	}
	index++;
	}

	if (verbose)
	vlib_cli_output (vm, "Total:");

	for (ni = 0; ni < vec_len (vm->node_main.nodes); ni++)
	{
	n = vlib_get_node (vm, ni);
	for (code = 0; code < n->n_errors; code++)
	{
	i = n->error_heap_index + code;
	if (sums[i])
	{
	if (verbose)
	vlib_cli_output (vm, "%10lu%=40v%=20s%=10d", sums[i], n->name,
	em->counters_heap[i].desc, i);
	}
	}
	}

	vec_free (sums);

	return 0;
	}

	/* INDENT-OFF */
	VLIB_CLI_COMMAND (vlib_cli_show_errors) = {
	.path = "show errors",
	.short_help = "Show error counts",
	.function = show_errors,
	};
	/* INDENT-ON */

	/* INDENT-OFF */
	VLIB_CLI_COMMAND (cli_show_node_counters, static) = {
	.path = "show node counters",
	.short_help = "Show node counters",
	.function = show_errors,
	};
	/* INDENT-ON */

	static clib_error_t *
	clear_error_counters (vlib_main_t * vm,
	unformat_input_t * input, vlib_cli_command_t * cmd)
	{
	vlib_error_main_t *em;
	u32 i;

	foreach_vlib_main ()
	{
	em = &this_vlib_main->error_main;
	vec_validate (em->counters_last_clear, vec_len (em->counters) - 1);
	for (i = 0; i < vec_len (em->counters); i++)
	em->counters_last_clear[i] = em->counters[i];
	}
	return 0;
	}

	/* INDENT-OFF */
	VLIB_CLI_COMMAND (cli_clear_error_counters, static) = {
	.path = "clear errors",
	.short_help = "Clear error counters",
	.function = clear_error_counters,
	};
	/* INDENT-ON */

	/* INDENT-OFF */
	VLIB_CLI_COMMAND (cli_clear_node_counters, static) = {
	.path = "clear node counters",
	.short_help = "Clear node counters",
	.function = clear_error_counters,
	};
	/* INDENT-ON */

	/*
	* fd.io coding-style-patch-verification: ON
	*
	* Local Variables:
	* eval: (c-set-style "gnu")
	* End:
	*/