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/*
 * Copyright (c) 2016 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.
 */

#ifndef __ADJ_L2_H__
#define __ADJ_L2_H__

#include <vnet/adj/adj.h>

extern vlib_node_registration_t adj_l2_midchain_node;
extern vlib_node_registration_t adj_l2_rewrite_node;

#endif
*/ .highlight .sd { color: #e6db74 } /* Literal.String.Doc */ .highlight .s2 { color: #e6db74 } /* Literal.String.Double */ .highlight .se { color: #ae81ff } /* Literal.String.Escape */ .highlight .sh { color: #e6db74 } /* Literal.String.Heredoc */ .highlight .si { color: #e6db74 } /* Literal.String.Interpol */ .highlight .sx { color: #e6db74 } /* Literal.String.Other */ .highlight .sr { color: #e6db74 } /* Literal.String.Regex */ .highlight .s1 { color: #e6db74 } /* Literal.String.Single */ .highlight .ss { color: #e6db74 } /* Literal.String.Symbol */ .highlight .bp { color: #f8f8f2 } /* Name.Builtin.Pseudo */ .highlight .fm { color: #a6e22e } /* Name.Function.Magic */ .highlight .vc { color: #f8f8f2 } /* Name.Variable.Class */ .highlight .vg { color: #f8f8f2 } /* Name.Variable.Global */ .highlight .vi { color: #f8f8f2 } /* Name.Variable.Instance */ .highlight .vm { color: #f8f8f2 } /* Name.Variable.Magic */ .highlight .il { color: #ae81ff } /* Literal.Number.Integer.Long */ } @media (prefers-color-scheme: light) { .highlight .hll { background-color: #ffffcc } .highlight .c { color: #888888 } /* Comment */ .highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */ .highlight .k { color: #008800; font-weight: bold } /* Keyword */ .highlight .ch { color: #888888 } /* Comment.Hashbang */ .highlight .cm { color: #888888 } /* Comment.Multiline */ .highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */ .highlight .cpf { color: #888888 } /* Comment.PreprocFile */ .highlight .c1 { color: #888888 } /* Comment.Single */ .highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */ .highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */ .highlight .ge { font-style: italic } /* Generic.Emph */ .highlight .gr { color: #aa0000 } /* Generic.Error */ .highlight .gh { color: #333333 } /* Generic.Heading */ .highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */ .highlight .go { color: #888888 } /* Generic.Output */ .highlight .gp { color: #555555 } /* Generic.Prompt */ .highlight .gs { font-weight: bold } /* Generic.Strong */ .highlight .gu { color: #666666 } /* Generic.Subheading */ .highlight .gt { color: #aa0000 } /* Generic.Traceback */ .highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */ .highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */ .highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */ .highlight .kp { color: #008800 } /* Keyword.Pseudo */ .highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */ .highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */ .highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */ .highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */ .highlight .na { color: #336699 } /* Name.Attribute */ .highlight .nb { color: #003388 } /* Name.Builtin */ .highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */ .highlight .no { color: #003366; font-weight: bold } /* Name.Constant */ .highlight .nd { color: #555555 } /* Name.Decorator */ .highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */ .highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */ .highlight .nl { color: #336699; font-style: italic } /* Name.Label */ .highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */ .highlight .py { color: #336699; font-weight: bold } /* Name.Property */ .highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */ .highlight .nv { color: #336699 } /* Name.Variable */ .highlight .ow { color: #008800 } /* Operator.Word */ .highlight .w { color: #bbbbbb } /* Text.Whitespace */ .highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */ .highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */ .highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */ .highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */ .highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */ .highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */ .highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */ .highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */ .highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */ .highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */ .highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */ .highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */ .highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */ .highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */ .highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */ .highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */ .highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */ .highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */ .highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */ .highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */ .highlight .vc { color: #336699 } /* Name.Variable.Class */ .highlight .vg { color: #dd7700 } /* Name.Variable.Global */ .highlight .vi { color: #3333bb } /* Name.Variable.Instance */ .highlight .vm { color: #336699 } /* Name.Variable.Magic */ .highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */ }
/*
 * Copyright (c) 2017 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 <vppinfra/clib.h>
#include <vppinfra/clib_error.h>
#include <vppinfra/format.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>

clib_error_t *
clib_sysfs_write (char *file_name, char *fmt, ...)
{
  u8 *s;
  int fd;
  clib_error_t *error = 0;

  fd = open (file_name, O_WRONLY);
  if (fd < 0)
    return clib_error_return_unix (0, "open `%s'", file_name);

  va_list va;
  va_start (va, fmt);
  s = va_format (0, fmt, &va);
  va_end (va);

  if (write (fd, s, vec_len (s)) < 0)
    error = clib_error_return_unix (0, "write `%s'", file_name);

  vec_free (s);
  close (fd);
  return error;
}

clib_error_t *
clib_sysfs_read (char *file_name, char *fmt, ...)
{
  unformat_input_t input;
  u8 *s = 0;
  int fd;
  ssize_t sz;
  uword result;

  fd = open (file_name, O_RDONLY);
  if (fd < 0)
    return clib_error_return_unix (0, "open `%s'", file_name);

  vec_validate (s, 4095);

  sz = read (fd, s, vec_len (s));
  if (sz < 0)
    {
      close (fd);
      vec_free (s);
      return clib_error_return_unix (0, "read `%s'", file_name);
    }

  _vec_len (s) = sz;
  unformat_init_vector (&input, s);

  va_list va;
  va_start (va, fmt);
  result = va_unformat (&input, fmt, &va);
  va_end (va);

  vec_free (s);
  close (fd);

  if (result == 0)
    return clib_error_return (0, "unformat error");

  return 0;
}

u8 *
clib_sysfs_link_to_name (char *link)
{
  char *p, buffer[64];
  unformat_input_t in;
  u8 *s = 0;
  int r;

  r = readlink (link, buffer, sizeof (buffer) - 1);

  if (r < 0)
    return 0;

  buffer[r] = 0;
  p = strrchr (buffer, '/');

  if (!p)
    return 0;

  unformat_init_string (&in, p + 1, strlen (p + 1));
  if (unformat (&in, "%s", &s) != 1)
    clib_unix_warning ("no string?");
  unformat_free (&in);

  return s;
}

clib_error_t *
clib_sysfs_set_nr_hugepages (int numa_node, int log2_page_size, int nr)
{
  clib_error_t *error = 0;
  struct stat sb;
  u8 *p = 0;
  uword page_size;

  if (log2_page_size == 0)
    log2_page_size = min_log2 (clib_mem_get_default_hugepage_size ());

  page_size = 1ULL << (log2_page_size - 10);

  p = format (p, "/sys/devices/system/node/node%u%c", numa_node, 0);

  if (stat ((char *) p, &sb) == 0)
    {
      if (S_ISDIR (sb.st_mode) == 0)
	{
	  error = clib_error_return (0, "'%s' is not directory", p);
	  goto done;
	}
    }
  else if (numa_node == 0)
    {
      vec_reset_length (p);
      p = format (p, "/sys/kernel/mm%c", 0);
      if (stat ((char *) p, &sb) < 0 || S_ISDIR (sb.st_mode) == 0)
	{
	  error = clib_error_return (0, "'%s' does not exist or it is not "
				     "directory", p);
	  goto done;
	}
    }
  else
    {
      error = clib_error_return (0, "'%s' does not exist", p);
      goto done;
    }

  _vec_len (p) -= 1;
  p = format (p, "/hugepages/hugepages-%ukB/nr_hugepages%c", page_size, 0);
  clib_sysfs_write ((char *) p, "%d", nr);

done:
  vec_free (p);
  return error;
}


static clib_error_t *
clib_sysfs_get_xxx_hugepages (char *type, int numa_node,
			      int log2_page_size, int *val)
{
  clib_error_t *error = 0;
  struct stat sb;
  u8 *p = 0;

  uword page_size;

  if (log2_page_size == 0)
    log2_page_size = min_log2 (clib_mem_get_default_hugepage_size ());

  page_size = 1ULL << (log2_page_size - 10);


  p = format (p, "/sys/devices/system/node/node%u%c", numa_node, 0);

  if (stat ((char *) p, &sb) == 0)
    {
      if (S_ISDIR (sb.st_mode) == 0)
	{
	  error = clib_error_return (0, "'%s' is not directory", p);
	  goto done;
	}
    }
  else if (numa_node == 0)
    {
      vec_reset_length (p);
      p = format (p, "/sys/kernel/mm%c", 0);
      if (stat ((char *) p, &sb) < 0 || S_ISDIR (sb.st_mode) == 0)
	{
	  error = clib_error_return (0, "'%s' does not exist or it is not "
				     "directory", p);
	  goto done;
	}
    }
  else
    {
      error = clib_error_return (0, "'%s' does not exist", p);
      goto done;
    }

  _vec_len (p) -= 1;
  p = format (p, "/hugepages/hugepages-%ukB/%s_hugepages%c", page_size,
	      type, 0);
  error = clib_sysfs_read ((char *) p, "%d", val);

done:
  vec_free (p);
  return error;
}

clib_error_t *
clib_sysfs_get_free_hugepages (int numa_node, int log2_page_size, int *v)
{
  return clib_sysfs_get_xxx_hugepages ("free", numa_node, log2_page_size, v);
}

clib_error_t *
clib_sysfs_get_nr_hugepages (int numa_node, int log2_page_size, int *v)
{
  return clib_sysfs_get_xxx_hugepages ("nr", numa_node, log2_page_size, v);
}

clib_error_t *
clib_sysfs_get_surplus_hugepages (int numa_node, int log2_page_size, int *v)
{
  return clib_sysfs_get_xxx_hugepages ("surplus", numa_node, log2_page_size,
				       v);
}

clib_error_t *
clib_sysfs_prealloc_hugepages (int numa_node, int log2_page_size, int nr)
{
  clib_error_t *error = 0;
  int n, needed;
  uword page_size;

  if (log2_page_size == 0)
    log2_page_size = min_log2 (clib_mem_get_default_hugepage_size ());

  page_size = 1ULL << (log2_page_size - 10);

  error = clib_sysfs_get_free_hugepages (numa_node, log2_page_size, &n);
  if (error)
    return error;
  needed = nr - n;
  if (needed <= 0)
    return 0;

  error = clib_sysfs_get_nr_hugepages (numa_node, log2_page_size, &n);
  if (error)
    return error;
  clib_warning ("pre-allocating %u additional %uK hugepages on numa node %u",
		needed, page_size, numa_node);
  return clib_sysfs_set_nr_hugepages (numa_node, log2_page_size, n + needed);
}


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