mariadb/storage/perfschema/table_host_cache.h

/* Copyright (c) 2011, 2023, Oracle and/or its affiliates.

  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, Fifth Floor, Boston, MA 02110-1335 USA */

#ifndef TABLE_HOST_CACHE_H
#define TABLE_HOST_CACHE_H

/**
  @file storage/perfschema/table_host_cache.h
  Table HOST_CACHE (declarations).
*/

#include "pfs_column_types.h"
#include "pfs_engine_table.h"

class Host_entry;

/**
  @addtogroup Performance_schema_tables
  @{
*/

/** A row of PERFORMANCE_SCHEMA.HOST_CACHE. */
struct row_host_cache
{
  /** Column IP. */
  char m_ip[64];
  uint m_ip_length;
  /** Column HOST. */
  char m_hostname[255];
  uint m_hostname_length;
  /** Column HOST_VALIDATED. */
  bool m_host_validated;
  /** Column SUM_CONNECT_ERRORS. */
  ulonglong m_sum_connect_errors;
  /** Column COUNT_HOST_BLOCKED_ERRORS. */
  ulonglong m_count_host_blocked_errors;
  /** Column COUNT_NAMEINFO_TRANSIENT_ERRORS. */
  ulonglong m_count_nameinfo_transient_errors;
  /** Column COUNT_NAMEINFO_PERMANENT_ERRORS. */
  ulonglong m_count_nameinfo_permanent_errors;
  /** Column COUNT_FORMAT_ERRORS. */
  ulonglong m_count_format_errors;
  /** Column COUNT_ADDRINFO_TRANSIENT_ERRORS. */
  ulonglong m_count_addrinfo_transient_errors;
  /** Column COUNT_ADDRINFO_PERMANENT_ERRORS. */
  ulonglong m_count_addrinfo_permanent_errors;
  /** Column COUNT_FCRDNS_ERRORS. */
  ulonglong m_count_fcrdns_errors;
  /** Column COUNT_HOST_ACL_ERRORS. */
  ulonglong m_count_host_acl_errors;
  /** Column COUNT_NO_AUTH_PLUGIN_ERRORS. */
  ulonglong m_count_no_auth_plugin_errors;
  /** Column COUNT_AUTH_PLUGIN_ERRORS. */
  ulonglong m_count_auth_plugin_errors;
  /** Column COUNT_HANDSHAKE_ERRORS. */
  ulonglong m_count_handshake_errors;
  /** Column COUNT_PROXY_USER_ERRORS. */
  ulonglong m_count_proxy_user_errors;
  /** Column COUNT_PROXY_USER_ACL_ERRORS. */
  ulonglong m_count_proxy_user_acl_errors;
  /** Column COUNT_AUTHENTICATION_ERRORS. */
  ulonglong m_count_authentication_errors;
  /** Column COUNT_SSL_ERRORS. */
  ulonglong m_count_ssl_errors;
  /** Column COUNT_MAX_USER_CONNECTION_ERRORS. */
  ulonglong m_count_max_user_connection_errors;
  /** Column COUNT_MAX_USER_CONNECTION_PER_HOUR_ERRORS. */
  ulonglong m_count_max_user_connection_per_hour_errors;
  /** Column COUNT_DEFAULT_DATABASE_ERRORS. */
  ulonglong m_count_default_database_errors;
  /** Column COUNT_INIT_CONNECT_ERRORS. */
  ulonglong m_count_init_connect_errors;
  /** Column COUNT_LOCAL_ERRORS. */
  ulonglong m_count_local_errors;
  /** Column COUNT_UNKNOWN_ERRORS. */
  ulonglong m_count_unknown_errors;
  /** Column FIRST_SEEN. */
  ulonglong m_first_seen;
  /** Column LAST_SEEN. */
  ulonglong m_last_seen;
  /** Column FIRST_ERROR_SEEN. */
  ulonglong m_first_error_seen;
  /** Column LAST_ERROR_SEEN. */
  ulonglong m_last_error_seen;
};

/** Table PERFORMANCE_SCHEMA.HOST_CACHE. */
class table_host_cache : public PFS_engine_table
{
public:
  static PFS_engine_table_share_state m_share_state;
  /** Table share. */
  static PFS_engine_table_share m_share;
  static PFS_engine_table* create();
  static int delete_all_rows();
  static ha_rows get_row_count();

  int rnd_next() override;
  int rnd_pos(const void *pos) override;
  void reset_position(void) override;

protected:
  int read_row_values(TABLE *table,
                      unsigned char *buf,
                      Field **fields,
                      bool read_all) override;

  table_host_cache();

public:
  ~table_host_cache() = default;

private:
  void materialize(THD *thd);
  static void make_row(Host_entry *entry, row_host_cache *row);

  /** Table share lock. */
  static THR_LOCK m_table_lock;

  row_host_cache *m_all_rows;
  uint m_row_count;
  /** Current row. */
  row_host_cache *m_row;
  /** Current position. */
  PFS_simple_index m_pos;
  /** Next position. */
  PFS_simple_index m_next_pos;
};

/** @} */
#endif