/*
 * 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>

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;

  drop_error = vlib_error_set (drop_error_node, 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;
}

void vlib_stats_register_error_index (u8 *, u64 *, u64)
  __attribute__ ((weak));
void
vlib_stats_register_error_index (u8 * notused, u64 * notused2, u64 notused3)
{
};

void vlib_stats_pop_heap2 (void *, u32, void *) __attribute__ ((weak));
void
vlib_stats_pop_heap2 (void *notused, u32 notused2, void *notused3)
{
};


/* 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_main_t *em = &vm->error_main;
  vlib_node_t *n = vlib_get_node (vm, node_index);
  uword l;
  void *oldheap;
  void *vlib_stats_push_heap (void) __attribute__ ((weak));

  ASSERT (vlib_get_thread_index () == 0);

  /* Free up any previous error strings. */
  if (n->n_errors > 0)
    heap_dealloc (em->error_st<style>
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