path: root/storage/perfschema/table_host_cache.cc

/* Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License, version 2.0,
  as published by the Free Software Foundation.

  This program is also distributed with certain software (including
  but not limited to OpenSSL) that is licensed under separate terms,
  as designated in a particular file or component or in included license
  documentation.  The authors of MySQL hereby grant you an additional
  permission to link the program and your derivative works with the
  separately licensed software that they have included with MySQL.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License, version 2.0, for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software Foundation,
  51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */

/**
  @file storage/perfschema/table_host_cache.cc
  Table HOST_CACHE (implementation).
*/

#include "my_global.h"
#include "my_pthread.h"
#include "table_host_cache.h"
#include "hostname.h"

THR_LOCK table_host_cache::m_table_lock;

static const TABLE_FIELD_TYPE field_types[]=
{
  {
    { C_STRING_WITH_LEN("IP") },
    { C_STRING_WITH_LEN("varchar(64)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("HOST") },
    { C_STRING_WITH_LEN("varchar(255)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("HOST_VALIDATED") },
    { C_STRING_WITH_LEN("enum(\'YES\',\'NO\')") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("SUM_CONNECT_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_HOST_BLOCKED_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_NAMEINFO_TRANSIENT_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_NAMEINFO_PERMANENT_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_FORMAT_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_ADDRINFO_TRANSIENT_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_ADDRINFO_PERMANENT_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_FCRDNS_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_HOST_ACL_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_NO_AUTH_PLUGIN_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_AUTH_PLUGIN_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_HANDSHAKE_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_PROXY_USER_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_PROXY_USER_ACL_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_AUTHENTICATION_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_SSL_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_MAX_USER_CONNECTIONS_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_MAX_USER_CONNECTIONS_PER_HOUR_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_DEFAULT_DATABASE_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_INIT_CONNECT_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_LOCAL_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("COUNT_UNKNOWN_ERRORS") },
    { C_STRING_WITH_LEN("bigint(20)") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("FIRST_SEEN") },
    { C_STRING_WITH_LEN("timestamp") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("LAST_SEEN") },
    { C_STRING_WITH_LEN("timestamp") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("FIRST_ERROR_SEEN") },
    { C_STRING_WITH_LEN("timestamp") },
    { NULL, 0}
  },
  {
    { C_STRING_WITH_LEN("LAST_ERROR_SEEN") },
    { C_STRING_WITH_LEN("timestamp") },
    { NULL, 0}
  }
};

TABLE_FIELD_DEF
table_host_cache::m_field_def=
{ 29, field_types };

PFS_engine_table_share
table_host_cache::m_share=
{
  { C_STRING_WITH_LEN("host_cache") },
  &pfs_truncatable_acl,
  &table_host_cache::create,
  NULL, /* write_row */
  table_host_cache::delete_all_rows,
  NULL, /* get_row_count */
  1000, /* records */
  sizeof(PFS_simple_index), /* ref length */
  &m_table_lock,
  &m_field_def,
  false /* checked */
};

PFS_engine_table* table_host_cache::create(void)
{
  table_host_cache *t= new table_host_cache();
  if (t != NULL)
  {
    THD *thd= current_thd;
    DBUG_ASSERT(thd != NULL);
    t->materialize(thd);
  }
  return t;
}

int
table_host_cache::delete_all_rows(void)
{
  /*
    TRUNCATE TABLE performance_schema.host_cache
    is an alternate syntax for
    FLUSH HOSTS
  */
  hostname_cache_refresh();
  return 0;
}

table_host_cache::table_host_cache()
  : PFS_engine_table(&m_share, &m_pos),
    m_all_rows(NULL), m_row_count(0),
    m_row(NULL), m_pos(0), m_next_pos(0)
{}

void table_host_cache::materialize(THD *thd)
{
  Host_entry *current;
  Host_entry *first;
  uint size;
  uint index;
  row_host_cache *rows;
  row_host_cache *row;

  DBUG_ASSERT(m_all_rows == NULL);
  DBUG_ASSERT(m_row_count == 0);

  hostname_cache_lock();

  size= hostname_cache_size();
  if (size == 0)
  {
    /* Normal case, the cache is empty. */
    goto end;
  }

  rows= (row_host_cache*) thd->alloc(size * sizeof(row_host_cache));
  if (rows == NULL)
  {
    /* Out of memory, this thread will error out. */
    goto end;
  }

  index= 0;
  row= rows;

  first= hostname_cache_first();
  current= first;

  while ((current != NULL) && (index < size))
  {
    make_row(current, row);
    index++;
    row++;
    current= current->next();
  }

  m_all_rows= rows;
  m_row_count= index;

end:
  hostname_cache_unlock();
}

void table_host_cache::make_row(Host_entry *entry, row_host_cache *row)
{
  row->m_ip_length= strlen(entry->ip_key);
  strcpy(row->m_ip, entry->ip_key);
  row->m_hostname_length= entry->m_hostname_length;
  if (row->m_hostname_length > 0)
    strncpy(row->m_hostname, entry->m_hostname, row->m_hostname_length);
  row->m_host_validated= entry->m_host_validated;
  row->m_sum_connect_errors= entry->m_errors.m_connect;
  row->m_count_host_blocked_errors= entry->m_errors.m_host_blocked;
  row->m_count_nameinfo_transient_errors= entry->m_errors.m_nameinfo_transient;
  row->m_count_nameinfo_permanent_errors= entry->m_errors.m_nameinfo_permanent;
  row->m_count_format_errors= entry->m_errors.m_format;
  row->m_count_addrinfo_transient_errors= entry->m_errors.m_addrinfo_transient;
  row->m_count_addrinfo_permanent_errors= entry->m_errors.m_addrinfo_permanent;
  row->m_count_fcrdns_errors= entry->m_errors.m_FCrDNS;
  row->m_count_host_acl_errors= entry->m_errors.m_host_acl;
  row->m_count_no_auth_plugin_errors= entry->m_errors.m_no_auth_plugin;
  row->m_count_auth_plugin_errors= entry->m_errors.m_auth_plugin;
  row->m_count_handshake_errors= entry->m_errors.m_handshake;
  row->m_count_proxy_user_errors= entry->m_errors.m_proxy_user;
  row->m_count_proxy_user_acl_errors= entry->m_errors.m_proxy_user_acl;
  row->m_count_authentication_errors= entry->m_errors.m_authentication;
  row->m_count_ssl_errors= entry->m_errors.m_ssl;
  row->m_count_max_user_connection_errors= entry->m_errors.m_max_user_connection;
  row->m_count_max_user_connection_per_hour_errors= entry->m_errors.m_max_user_connection_per_hour;
  row->m_count_default_database_errors= entry->m_errors.m_default_database;
  row->m_count_init_connect_errors= entry->m_errors.m_init_connect;
  row->m_count_local_errors= entry->m_errors.m_local;

  /*
    Reserved for future use, to help with backward compatibility.
    When new errors are added in entry->m_errors.m_xxx,
    report them in this column (GA releases),
    until the table HOST_CACHE structure can be extended (next development version).
  */
  row->m_count_unknown_errors= 0;

  row->m_first_seen= entry->m_first_seen;
  row->m_last_seen= entry->m_last_seen;
  row->m_first_error_seen= entry->m_first_error_seen;
  row->m_last_error_seen= entry->m_last_error_seen;
}

void table_host_cache::reset_position(void)
{
  m_pos.m_index= 0;
  m_next_pos.m_index= 0;
}

int table_host_cache::rnd_next(void)
{
  int result;

  m_pos.set_at(&m_next_pos);

  if (m_pos.m_index < m_row_count)
  {
    m_row= &m_all_rows[m_pos.m_index];
    m_next_pos.set_after(&m_pos);
    result= 0;
  }
  else
  {
    m_row= NULL;
    result= HA_ERR_END_OF_FILE;
  }

  return result;
}

int table_host_cache::rnd_pos(const void *pos)
{
  set_position(pos);
  DBUG_ASSERT(m_pos.m_index < m_row_count);
  m_row= &m_all_rows[m_pos.m_index];
  return 0;
}

int table_host_cache::read_row_values(TABLE *table,
                                      unsigned char *buf,
                                      Field **fields,
                                      bool read_all)
{
  Field *f;

  DBUG_ASSERT(m_row);

  /* Set the null bits */
  DBUG_ASSERT(table->s->null_bytes == 1);
  buf[0]= 0;

  for (; (f= *fields) ; fields++)
  {
    if (read_all || bitmap_is_set(table->read_set, f->field_index))
    {
      switch(f->field_index)
      {
      case 0: /* IP */
        set_field_varchar_utf8(f, m_row->m_ip, m_row->m_ip_length);
        break;
      case 1: /* HOST */
        if (m_row->m_hostname_length > 0)
          set_field_varchar_utf8(f, m_row->m_hostname, m_row->m_hostname_length);
        else
          f->set_null();
        break;
      case 2: /* HOST_VALIDATED */
        set_field_enum(f, m_row->m_host_validated ? ENUM_YES : ENUM_NO);
        break;
      case 3: /* SUM_CONNECT_ERRORS */
        set_field_ulonglong(f, m_row->m_sum_connect_errors);
        break;
      case 4: /* COUNT_HOST_BLOCKED_ERRORS. */
        set_field_ulonglong(f, m_row->m_count_host_blocked_errors);
        break;
      case 5: /* COUNT_NAMEINFO_TRANSIENT_ERRORS */
        set_field_ulonglong(f, m_row->m_count_nameinfo_transient_errors);
        break;
      case 6: /* COUNT_NAMEINFO_PERSISTENT_ERRORS */
        set_field_ulonglong(f, m_row->m_count_nameinfo_permanent_errors);
        break;
      case 7: /* COUNT_FORMAT_ERRORS */
        set_field_ulonglong(f, m_row->m_count_format_errors);
        break;
      case 8: /* COUNT_ADDRINFO_TRANSIENT_ERRORS */
        set_field_ulonglong(f, m_row->m_count_addrinfo_transient_errors);
        break;
      case 9: /* COUNT_ADDRINFO_PERSISTENT_ERRORS */
        set_field_ulonglong(f, m_row->m_count_addrinfo_permanent_errors);
        break;
      case 10: /* COUNT_FCRDNS_ERRORS */
        set_field_ulonglong(f, m_row->m_count_fcrdns_errors);
        break;
      case 11: /* COUNT_HOST_ACL_ERRORS */
        set_field_ulonglong(f, m_row->m_count_host_acl_errors);
        break;
      case 12: /* COUNT_NO_AUTH_PLUGIN_ERRORS */
        set_field_ulonglong(f, m_row->m_count_no_auth_plugin_errors);
        break;
      case 13: /* COUNT_AUTH_PLUGIN_ERRORS */
        set_field_ulonglong(f, m_row->m_count_auth_plugin_errors);
        break;
      case 14: /* COUNT_HANDSHAKE_ERRORS */
        set_field_ulonglong(f, m_row->m_count_handshake_errors);
        break;
      case 15: /* COUNT_PROXY_USER_ERRORS */
        set_field_ulonglong(f, m_row->m_count_proxy_user_errors);
        break;
      case 16: /* COUNT_PROXY_USER_ACL_ERRORS */
        set_field_ulonglong(f, m_row->m_count_proxy_user_acl_errors);
        break;
      case 17: /* COUNT_AUTHENTICATION_ERRORS */
        set_field_ulonglong(f, m_row->m_count_authentication_errors);
        break;
      case 18: /* COUNT_SSL_ERRORS */
        set_field_ulonglong(f, m_row->m_count_ssl_errors);
        break;
      case 19: /* COUNT_MAX_USER_CONNECTION_ERRORS */
        set_field_ulonglong(f, m_row->m_count_max_user_connection_errors);
        break;
      case 20: /* COUNT_MAX_USER_CONNECTION_PER_HOUR_ERRORS */
        set_field_ulonglong(f, m_row->m_count_max_user_connection_per_hour_errors);
        break;
      case 21: /* COUNT_DEFAULT_DATABASE_ERRORS */
        set_field_ulonglong(f, m_row->m_count_default_database_errors);
        break;
      case 22: /* COUNT_INIT_CONNECT_ERRORS */
        set_field_ulonglong(f, m_row->m_count_init_connect_errors);
        break;
      case 23: /* COUNT_LOCAL_ERRORS */
        set_field_ulonglong(f, m_row->m_count_local_errors);
        break;
      case 24: /* COUNT_UNKNOWN_ERRORS */
        set_field_ulonglong(f, m_row->m_count_unknown_errors);
        break;
      case 25: /* FIRST_SEEN */
        set_field_timestamp(f, m_row->m_first_seen);
        break;
      case 26: /* LAST_SEEN */
        set_field_timestamp(f, m_row->m_last_seen);
        break;
      case 27: /* FIRST_ERROR_SEEN */
        if (m_row->m_first_error_seen != 0)
          set_field_timestamp(f, m_row->m_first_error_seen);
        else
          f->set_null();
        break;
      case 28: /* LAST_ERROR_SEEN */
        if (m_row->m_last_error_seen != 0)
          set_field_timestamp(f, m_row->m_last_error_seen);
        else
          f->set_null();
        break;
      default:
        DBUG_ASSERT(false);
      }
    }
  }

  return 0;
}