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/* Copyright (C) 2000-2003 MySQL AB
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   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; version 2 of the License.
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   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 for more details.
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   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */


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/**
  @file

  @brief
  logging of commands

  @todo
    Abort logging when we get an error in reading or writing log files
*/
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#include "mysql_priv.h"
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#include "sql_repl.h"
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#include "rpl_filter.h"
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#include "rpl_rli.h"
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#include <my_dir.h>
#include <stdarg.h>
#include <m_ctype.h>				// For test_if_number

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#ifdef __NT__
#include "message.h"
#endif

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#include <mysql/plugin.h>

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/* max size of the log message */
#define MAX_LOG_BUFFER_SIZE 1024
#define MAX_USER_HOST_SIZE 512
#define MAX_TIME_SIZE 32
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#define MY_OFF_T_UNDEF (~(my_off_t)0UL)
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#define FLAGSTR(V,F) ((V)&(F)?#F" ":"")
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LOGGER logger;

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MYSQL_BIN_LOG mysql_bin_log;
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ulong sync_binlog_counter= 0;
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static Muted_query_log_event invisible_commit;

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static bool test_if_number(const char *str,
			   long *res, bool allow_wildcards);
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static int binlog_init(void *p);
static int binlog_close_connection(handlerton *hton, THD *thd);
static int binlog_savepoint_set(handlerton *hton, THD *thd, void *sv);
static int binlog_savepoint_rollback(handlerton *hton, THD *thd, void *sv);
static int binlog_commit(handlerton *hton, THD *thd, bool all);
static int binlog_rollback(handlerton *hton, THD *thd, bool all);
static int binlog_prepare(handlerton *hton, THD *thd, bool all);
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/**
  Silence all errors and warnings reported when performing a write
  to a log table.
  Errors and warnings are not reported to the client or SQL exception
  handlers, so that the presence of logging does not interfere and affect
  the logic of an application.
*/
class Silence_log_table_errors : public Internal_error_handler
{
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  char m_message[MYSQL_ERRMSG_SIZE];
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public:
  Silence_log_table_errors()
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  {
    m_message[0]= '\0';
  }
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  virtual ~Silence_log_table_errors() {}

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  virtual bool handle_error(uint sql_errno, const char *message,
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                            MYSQL_ERROR::enum_warning_level level,
                            THD *thd);
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  const char *message() const { return m_message; }
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};

bool
Silence_log_table_errors::handle_error(uint /* sql_errno */,
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                                       const char *message_arg,
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                                       MYSQL_ERROR::enum_warning_level /* level */,
                                       THD * /* thd */)
{
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  strmake(m_message, message_arg, sizeof(m_message));
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  return TRUE;
}


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sql_print_message_func sql_print_message_handlers[3] =
{
  sql_print_information,
  sql_print_warning,
  sql_print_error
};


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char *make_default_log_name(char *buff,const char* log_ext)
{
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  strmake(buff, pidfile_name, FN_REFLEN-5);
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  return fn_format(buff, buff, mysql_data_home, log_ext,
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                   MYF(MY_UNPACK_FILENAME|MY_REPLACE_EXT));
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}

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/*
  Helper class to hold a mutex for the duration of the
  block.

  Eliminates the need for explicit unlocking of mutexes on, e.g.,
  error returns.  On passing a null pointer, the sentry will not do
  anything.
 */
class Mutex_sentry
{
public:
  Mutex_sentry(pthread_mutex_t *mutex)
    : m_mutex(mutex)
  {
    if (m_mutex)
      pthread_mutex_lock(mutex);
  }

  ~Mutex_sentry()
  {
    if (m_mutex)
      pthread_mutex_unlock(m_mutex);
#ifndef DBUG_OFF
    m_mutex= 0;
#endif
  }

private:
  pthread_mutex_t *m_mutex;

  // It's not allowed to copy this object in any way
  Mutex_sentry(Mutex_sentry const&);
  void operator=(Mutex_sentry const&);
};

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/*
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  Helper class to store binary log transaction data.
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*/
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class binlog_trx_data {
public:
  binlog_trx_data()
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    : m_pending(0), before_stmt_pos(MY_OFF_T_UNDEF)
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  {
    trans_log.end_of_file= max_binlog_cache_size;
  }

  ~binlog_trx_data()
  {
    DBUG_ASSERT(pending() == NULL);
    close_cached_file(&trans_log);
  }

  my_off_t position() const {
    return my_b_tell(&trans_log);
  }

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  bool empty() const
  {
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    return pending() == NULL && my_b_tell(&trans_log) == 0;
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  }
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  /*
    Truncate the transaction cache to a certain position. This
    includes deleting the pending event.
   */
  void truncate(my_off_t pos)
  {
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    DBUG_PRINT("info", ("truncating to position %lu", (ulong) pos));
    DBUG_PRINT("info", ("before_stmt_pos=%lu", (ulong) pos));
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    delete pending();
    set_pending(0);
    reinit_io_cache(&trans_log, WRITE_CACHE, pos, 0, 0);
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    if (pos < before_stmt_pos)
      before_stmt_pos= MY_OFF_T_UNDEF;
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  }

  /*
    Reset the entire contents of the transaction cache, emptying it
    completely.
   */
  void reset() {
    if (!empty())
      truncate(0);
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    before_stmt_pos= MY_OFF_T_UNDEF;
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    trans_log.end_of_file= max_binlog_cache_size;
  }

  Rows_log_event *pending() const
  {
    return m_pending;
  }

  void set_pending(Rows_log_event *const pending)
  {
    m_pending= pending;
  }

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  IO_CACHE trans_log;                         // The transaction cache
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private:
  /*
    Pending binrows event. This event is the event where the rows are
    currently written.
   */
  Rows_log_event *m_pending;

public:
  /*
    Binlog position before the start of the current statement.
  */
  my_off_t before_stmt_pos;
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};

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handlerton *binlog_hton;
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bool LOGGER::is_log_table_enabled(uint log_table_type)
{
  switch (log_table_type) {
  case QUERY_LOG_SLOW:
    return (table_log_handler != NULL) && opt_slow_log;
  case QUERY_LOG_GENERAL:
    return (table_log_handler != NULL) && opt_log ;
  default:
    DBUG_ASSERT(0);
    return FALSE;                             /* make compiler happy */
  }
}

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/* Check if a given table is opened log table */
int check_if_log_table(uint db_len, const char *db, uint table_name_len,
                       const char *table_name, uint check_if_opened)
{
  if (db_len == 5 &&
      !(lower_case_table_names ?
        my_strcasecmp(system_charset_info, db, "mysql") :
        strcmp(db, "mysql")))
  {
    if (table_name_len == 11 && !(lower_case_table_names ?
                                  my_strcasecmp(system_charset_info,
                                                table_name, "general_log") :
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                                  strcmp(table_name, "general_log")))
    {
      if (!check_if_opened || logger.is_log_table_enabled(QUERY_LOG_GENERAL))
        return QUERY_LOG_GENERAL;
      return 0;
    }

    if (table_name_len == 8 && !(lower_case_table_names ?
      my_strcasecmp(system_charset_info, table_name, "slow_log") :
      strcmp(table_name, "slow_log")))
    {
      if (!check_if_opened || logger.is_log_table_enabled(QUERY_LOG_SLOW))
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        return QUERY_LOG_SLOW;
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      return 0;
    }
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  }
  return 0;
}

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Log_to_csv_event_handler::Log_to_csv_event_handler()
{
}


Log_to_csv_event_handler::~Log_to_csv_event_handler()
{
}

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void Log_to_csv_event_handler::cleanup()
{
  logger.is_log_tables_initialized= FALSE;
}

/* log event handlers */

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/**
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  Log command to the general log table

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  Log given command to the general log table.

  @param  event_time        command start timestamp
  @param  user_host         the pointer to the string with user@host info
  @param  user_host_len     length of the user_host string. this is computed
                            once and passed to all general log event handlers
  @param  thread_id         Id of the thread, issued a query
  @param  command_type      the type of the command being logged
  @param  command_type_len  the length of the string above
  @param  sql_text          the very text of the query being executed
  @param  sql_text_len      the length of sql_text string


  @return This function attempts to never call my_error(). This is
  necessary, because general logging happens already after a statement
  status has been sent to the client, so the client can not see the
  error anyway. Besides, the error is not related to the statement
  being executed and is internal, and thus should be handled
  internally (@todo: how?).
  If a write to the table has failed, the function attempts to
  write to a short error message to the file. The failure is also
  indicated in the return value. 

  @retval  FALSE   OK
  @retval  TRUE    error occured
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*/

bool Log_to_csv_event_handler::
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  log_general(THD *thd, time_t event_time, const char *user_host,
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              uint user_host_len, int thread_id,
              const char *command_type, uint command_type_len,
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              const char *sql_text, uint sql_text_len,
              CHARSET_INFO *client_cs)
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{
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  TABLE_LIST table_list;
  TABLE *table;
  bool result= TRUE;
  bool need_close= FALSE;
  bool need_pop= FALSE;
  bool need_rnd_end= FALSE;
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  uint field_index;
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  Silence_log_table_errors error_handler;
  Open_tables_state open_tables_backup;
  ulonglong save_thd_options;
  bool save_time_zone_used;

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  /*
    CSV uses TIME_to_timestamp() internally if table needs to be repaired
    which will set thd->time_zone_used
  */
  save_time_zone_used= thd->time_zone_used;
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  save_thd_options= thd->options;
  thd->options&= ~OPTION_BIN_LOG;

  bzero(& table_list, sizeof(TABLE_LIST));
  table_list.alias= table_list.table_name= GENERAL_LOG_NAME.str;
  table_list.table_name_length= GENERAL_LOG_NAME.length;

  table_list.lock_type= TL_WRITE_CONCURRENT_INSERT;

  table_list.db= MYSQL_SCHEMA_NAME.str;
  table_list.db_length= MYSQL_SCHEMA_NAME.length;

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  /*
    1) open_performance_schema_table generates an error of the
    table can not be opened or is corrupted.
    2) "INSERT INTO general_log" can generate warning sometimes.

    Suppress these warnings and errors, they can't be dealt with
    properly anyway.

    QQ: this problem needs to be studied in more detail.
    Comment this 2 lines and run "cast.test" to see what's happening.
  */
  thd->push_internal_handler(& error_handler);
  need_pop= TRUE;

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  if (!(table= open_performance_schema_table(thd, & table_list,
                                             & open_tables_backup)))
    goto err;

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  need_close= TRUE;

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  if (table->file->extra(HA_EXTRA_MARK_AS_LOG_TABLE) ||
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      table->file->ha_rnd_init(0))
    goto err;

  need_rnd_end= TRUE;

  /* Honor next number columns if present */
  table->next_number_field= table->found_next_number_field;
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  /*
    NOTE: we do not call restore_record() here, as all fields are
    filled by the Logger (=> no need to load default ones).
  */

  /*
    We do not set a value for table->field[0], as it will use
    default value (which is CURRENT_TIMESTAMP).
  */
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  /* check that all columns exist */
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  if (table->s->fields < 6)
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    goto err;

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  DBUG_ASSERT(table->field[0]->type() == MYSQL_TYPE_TIMESTAMP);

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  ((Field_timestamp*) table->field[0])->store_timestamp((my_time_t)
                                                        event_time);
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  /* do a write */
  if (table->field[1]->store(user_host, user_host_len, client_cs) ||
      table->field[2]->store((longlong) thread_id, TRUE) ||
      table->field[3]->store((longlong) server_id, TRUE) ||
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      table->field[4]->store(command_type, command_type_len, client_cs))
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    goto err;

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  /*
    A positive return value in store() means truncation.
    Still logging a message in the log in this case.
  */
  if (table->field[5]->store(sql_text, sql_text_len, client_cs) < 0)
    goto err;
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  /* mark all fields as not null */
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  table->field[1]->set_notnull();
  table->field[2]->set_notnull();
  table->field[3]->set_notnull();
  table->field[4]->set_notnull();
  table->field[5]->set_notnull();
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  /* Set any extra columns to their default values */
  for (field_index= 6 ; field_index < table->s->fields ; field_index++)
  {
    table->field[field_index]->set_default();
  }

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  /* log table entries are not replicated */
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  if (table->file->ha_write_row(table->record[0]))
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    goto err;
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  result= FALSE;
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err:
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  if (result && !thd->killed)
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    sql_print_error("Failed to write to mysql.general_log: %s",
                    error_handler.message());
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  if (need_rnd_end)
  {
    table->file->ha_rnd_end();
    table->file->ha_release_auto_increment();
  }
  if (need_pop)
    thd->pop_internal_handler();
  if (need_close)
    close_performance_schema_table(thd, & open_tables_backup);

  thd->options= save_thd_options;
  thd->time_zone_used= save_time_zone_used;
  return result;
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}


/*
  Log a query to the slow log table

  SYNOPSIS
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    log_slow()
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    thd               THD of the query
    current_time      current timestamp
    query_start_arg   command start timestamp
    user_host         the pointer to the string with user@host info
    user_host_len     length of the user_host string. this is computed once
                      and passed to all general log event handlers
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    query_time        Amount of time the query took to execute (in microseconds)
    lock_time         Amount of time the query was locked (in microseconds)
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    is_command        The flag, which determines, whether the sql_text is a
                      query or an administrator command (these are treated
                      differently by the old logging routines)
    sql_text          the very text of the query or administrator command
                      processed
    sql_text_len      the length of sql_text string

  DESCRIPTION

   Log a query to the slow log table

  RETURN
    FALSE - OK
    TRUE - error occured
*/

bool Log_to_csv_event_handler::
  log_slow(THD *thd, time_t current_time, time_t query_start_arg,
           const char *user_host, uint user_host_len,
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           ulonglong query_utime, ulonglong lock_utime, bool is_command,
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           const char *sql_text, uint sql_text_len)
{
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  TABLE_LIST table_list;
  TABLE *table;
  bool result= TRUE;
  bool need_close= FALSE;
  bool need_rnd_end= FALSE;
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  Silence_log_table_errors error_handler;
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  Open_tables_state open_tables_backup;
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  CHARSET_INFO *client_cs= thd->variables.character_set_client;
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  bool save_time_zone_used;
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  DBUG_ENTER("Log_to_csv_event_handler::log_slow");
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  thd->push_internal_handler(& error_handler);
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  /*
    CSV uses TIME_to_timestamp() internally if table needs to be repaired
    which will set thd->time_zone_used
  */
  save_time_zone_used= thd->time_zone_used;

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  bzero(& table_list, sizeof(TABLE_LIST));
  table_list.alias= table_list.table_name= SLOW_LOG_NAME.str;
  table_list.table_name_length= SLOW_LOG_NAME.length;

  table_list.lock_type= TL_WRITE_CONCURRENT_INSERT;

  table_list.db= MYSQL_SCHEMA_NAME.str;
  table_list.db_length= MYSQL_SCHEMA_NAME.length;

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  if (!(table= open_performance_schema_table(thd, & table_list,
                                             & open_tables_backup)))
    goto err;
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  need_close= TRUE;

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  if (table->file->extra(HA_EXTRA_MARK_AS_LOG_TABLE) ||
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      table->file->ha_rnd_init(0))
    goto err;

  need_rnd_end= TRUE;

  /* Honor next number columns if present */
  table->next_number_field= table->found_next_number_field;
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  restore_record(table, s->default_values);    // Get empty record
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  /* check that all columns exist */
  if (table->s->fields < 11)
    goto err;

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  /* store the time and user values */
  DBUG_ASSERT(table->field[0]->type() == MYSQL_TYPE_TIMESTAMP);
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  ((Field_timestamp*) table->field[0])->store_timestamp((my_time_t)
                                                        current_time);
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  if (table->field[1]->store(user_host, user_host_len, client_cs))
    goto err;
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  if (query_start_arg)
  {
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    longlong query_time= (longlong) (query_utime/1000000);
    longlong lock_time=  (longlong) (lock_utime/1000000);
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    /*
      A TIME field can not hold the full longlong range; query_time or
      lock_time may be truncated without warning here, if greater than
      839 hours (~35 days)
    */
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    MYSQL_TIME t;
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    t.neg= 0;

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    /* fill in query_time field */
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    calc_time_from_sec(&t, (long) min(query_time, (longlong) TIME_MAX_VALUE_SECONDS), 0);
    if (table->field[2]->store_time(&t, MYSQL_TIMESTAMP_TIME))
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      goto err;
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    /* lock_time */
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    calc_time_from_sec(&t, (long) min(lock_time, (longlong) TIME_MAX_VALUE_SECONDS), 0);
    if (table->field[3]->store_time(&t, MYSQL_TIMESTAMP_TIME))
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      goto err;
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    /* rows_sent */
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    if (table->field[4]->store((longlong) thd->sent_row_count, TRUE))
      goto err;
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    /* rows_examined */
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    if (table->field[5]->store((longlong) thd->examined_row_count, TRUE))
      goto err;
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  }
  else
  {
    table->field[2]->set_null();
    table->field[3]->set_null();
    table->field[4]->set_null();
    table->field[5]->set_null();
  }
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  /* fill database field */
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  if (thd->db)
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  {
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    if (table->field[6]->store(thd->db, thd->db_length, client_cs))
      goto err;
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    table->field[6]->set_notnull();
  }
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  if (thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt)
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  {
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    if (table->
        field[7]->store((longlong)
                        thd->first_successful_insert_id_in_prev_stmt_for_binlog,
                        TRUE))
      goto err;
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    table->field[7]->set_notnull();
  }
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  /*
    Set value if we do an insert on autoincrement column. Note that for
    some engines (those for which get_auto_increment() does not leave a
    table lock until the statement ends), this is just the first value and
    the next ones used may not be contiguous to it.
  */
  if (thd->auto_inc_intervals_in_cur_stmt_for_binlog.nb_elements() > 0)
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  {
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    if (table->
        field[8]->store((longlong)
          thd->auto_inc_intervals_in_cur_stmt_for_binlog.minimum(), TRUE))
      goto err;
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    table->field[8]->set_notnull();
  }
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  if (table->field[9]->store((longlong) server_id, TRUE))
    goto err;
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  table->field[9]->set_notnull();
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  /*
    Column sql_text.
    A positive return value in store() means truncation.
    Still logging a message in the log in this case.
  */
  if (table->field[10]->store(sql_text, sql_text_len, client_cs) < 0)
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    goto err;

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  /* log table entries are not replicated */
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  if (table->file->ha_write_row(table->record[0]))
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    goto err;
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  result= FALSE;
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err:
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  thd->pop_internal_handler();

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  if (result && !thd->killed)
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    sql_print_error("Failed to write to mysql.slow_log: %s",
                    error_handler.message());
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  if (need_rnd_end)
  {
    table->file->ha_rnd_end();
    table->file->ha_release_auto_increment();
  }
  if (need_close)
    close_performance_schema_table(thd, & open_tables_backup);
  thd->time_zone_used= save_time_zone_used;
  DBUG_RETURN(result);
}

int Log_to_csv_event_handler::
  activate_log(THD *thd, uint log_table_type)
{
  TABLE_LIST table_list;
  TABLE *table;
  int result;
  Open_tables_state open_tables_backup;

  DBUG_ENTER("Log_to_csv_event_handler::activate_log");

  bzero(& table_list, sizeof(TABLE_LIST));

  if (log_table_type == QUERY_LOG_GENERAL)
  {
    table_list.alias= table_list.table_name= GENERAL_LOG_NAME.str;
    table_list.table_name_length= GENERAL_LOG_NAME.length;
  }
  else
  {
    DBUG_ASSERT(log_table_type == QUERY_LOG_SLOW);
    table_list.alias= table_list.table_name= SLOW_LOG_NAME.str;
    table_list.table_name_length= SLOW_LOG_NAME.length;
  }

  table_list.lock_type= TL_WRITE_CONCURRENT_INSERT;

  table_list.db= MYSQL_SCHEMA_NAME.str;
  table_list.db_length= MYSQL_SCHEMA_NAME.length;

  table= open_performance_schema_table(thd, & table_list,
                                       & open_tables_backup);
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  if (table)
  {
    result= 0;
    close_performance_schema_table(thd, & open_tables_backup);
  }
  else
    result= 1;

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  DBUG_RETURN(result);
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}

bool Log_to_csv_event_handler::
  log_error(enum loglevel level, const char *format, va_list args)
{
  /* No log table is implemented */
  DBUG_ASSERT(0);
  return FALSE;
}

bool Log_to_file_event_handler::
  log_error(enum loglevel level, const char *format,
            va_list args)
{
  return vprint_msg_to_log(level, format, args);
}

void Log_to_file_event_handler::init_pthread_objects()
{
  mysql_log.init_pthread_objects();
  mysql_slow_log.init_pthread_objects();
}


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/** Wrapper around MYSQL_LOG::write() for slow log. */
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bool Log_to_file_event_handler::
  log_slow(THD *thd, time_t current_time, time_t query_start_arg,
           const char *user_host, uint user_host_len,
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           ulonglong query_utime, ulonglong lock_utime, bool is_command,
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           const char *sql_text, uint sql_text_len)
{
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  return mysql_slow_log.write(thd, current_time, query_start_arg,
                              user_host, user_host_len,
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                              query_utime, lock_utime, is_command,
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                              sql_text, sql_text_len);
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}


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/**
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   Wrapper around MYSQL_LOG::write() for general log. We need it since we
   want all log event handlers to have the same signature.
*/

bool Log_to_file_event_handler::
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  log_general(THD *thd, time_t event_time, const char *user_host,
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              uint user_host_len, int thread_id,
              const char *command_type, uint command_type_len,
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              const char *sql_text, uint sql_text_len,
              CHARSET_INFO *client_cs)
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{
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  return mysql_log.write(event_time, user_host, user_host_len,
                         thread_id, command_type, command_type_len,
                         sql_text, sql_text_len);
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}


bool Log_to_file_event_handler::init()
{
  if (!is_initialized)
  {
    if (opt_slow_log)
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      mysql_slow_log.open_slow_log(sys_var_slow_log_path.value);
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    if (opt_log)
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      mysql_log.open_query_log(sys_var_general_log_path.value);
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    is_initialized= TRUE;
  }

  return FALSE;
}


void Log_to_file_event_handler::cleanup()
{
  mysql_log.cleanup();
  mysql_slow_log.cleanup();
}

void Log_to_file_event_handler::flush()
{
  /* reopen log files */
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  if (opt_log)
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    mysql_log.reopen_file();
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  if (opt_slow_log)
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    mysql_slow_log.reopen_file();
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}

/*
  Log error with all enabled log event handlers

  SYNOPSIS
    error_log_print()

    level             The level of the error significance: NOTE,
                      WARNING or ERROR.
    format            format string for the error message
    args              list of arguments for the format string

  RETURN
    FALSE - OK
    TRUE - error occured
*/

bool LOGGER::error_log_print(enum loglevel level, const char *format,
                             va_list args)
{
  bool error= FALSE;
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  Log_event_handler **current_handler;
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  /* currently we don't need locking here as there is no error_log table */
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  for (current_handler= error_log_handler_list ; *current_handler ;)
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    error= (*current_handler++)->log_error(level, format, args) || error;

  return error;
}


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void LOGGER::cleanup_base()
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{
  DBUG_ASSERT(inited == 1);
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  rwlock_destroy(&LOCK_logger);
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  if (table_log_handler)
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  {
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    table_log_handler->cleanup();
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    delete table_log_handler;
  }
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  if (file_log_handler)
    file_log_handler->cleanup();
}


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void LOGGER::cleanup_end()
{
  DBUG_ASSERT(inited == 1);
  if (file_log_handler)
    delete file_log_handler;
}


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/**
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  Perform basic log initialization: create file-based log handler and
  init error log.
*/
void LOGGER::init_base()
{
  DBUG_ASSERT(inited == 0);
  inited= 1;

  /*
    Here we create file log handler. We don't do it for the table log handler
    here as it cannot be created so early. The reason is THD initialization,
    which depends on the system variables (parsed later).
  */
  if (!file_log_handler)
    file_log_handler= new Log_to_file_event_handler;

  /* by default we use traditional error log */
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  init_error_log(LOG_FILE);
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  file_log_handler->init_pthread_objects();
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  my_rwlock_init(&LOCK_logger, NULL);
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}


void LOGGER::init_log_tables()
{
  if (!table_log_handler)
    table_log_handler= new Log_to_csv_event_handler;

  if (!is_log_tables_initialized &&
      !table_log_handler->init() && !file_log_handler->init())
    is_log_tables_initialized= TRUE;
}


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bool LOGGER::flush_logs(THD *thd)
{
  int rc= 0;
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  /*
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    Now we lock logger, as nobody should be able to use logging routines while
    log tables are closed
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  */
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  logger.lock_exclusive();
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  /* reopen log files */
  file_log_handler->flush();
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  /* end of log flush */
  logger.unlock();
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  return rc;
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}


/*
  Log slow query with all enabled log event handlers

  SYNOPSIS
    slow_log_print()

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    thd                 THD of the query being logged
    query               The query being logged
    query_length        The length of the query string
    current_utime       Current time in microseconds (from undefined start)
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  RETURN
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    FALSE   OK
    TRUE    error occured
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*/

bool LOGGER::slow_log_print(THD *thd, const char *query, uint query_length,
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                            ulonglong current_utime)

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{
  bool error= FALSE;
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  Log_event_handler **current_handler;
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  bool is_command= FALSE;
  char user_host_buff[MAX_USER_HOST_SIZE];
  Security_context *sctx= thd->security_ctx;
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  uint user_host_len= 0;
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  ulonglong query_utime, lock_utime;
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  /*
    Print the message to the buffer if we have slow log enabled
  */

  if (*slow_log_handler_list)
  {
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    time_t current_time;
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    /* do not log slow queries from replication threads */
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    if (thd->slave_thread && !opt_log_slow_slave_statements)
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      return 0;

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    lock_shared();
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    if (!opt_slow_log)
    {
      unlock();
      return 0;
    }
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    /* fill in user_host value: the format is "%s[%s] @ %s [%s]" */
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    user_host_len= (strxnmov(user_host_buff, MAX_USER_HOST_SIZE,
                             sctx->priv_user ? sctx->priv_user : "", "[",
                             sctx->user ? sctx->user : "", "] @ ",
                             sctx->host ? sctx->host : "", " [",
                             sctx->ip ? sctx->ip : "", "]", NullS) -
                    user_host_buff);

    current_time= my_time_possible_from_micro(current_utime);
    if (thd->start_utime)
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    {
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      query_utime= (current_utime - thd->start_utime);
      lock_utime=  (thd->utime_after_lock - thd->start_utime);
    }
    else
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    {
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      query_utime= lock_utime= 0;
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    }

    if (!query)
    {
      is_command= TRUE;
      query= command_name[thd->command].str;
      query_length= command_name[thd->command].length;
    }

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    for (current_handler= slow_log_handler_list; *current_handler ;)
      error= (*current_handler++)->log_slow(thd, current_time, thd->start_time,
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                                            user_host_buff, user_host_len,
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                                            query_utime, lock_utime, is_command,
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                                            query, query_length) || error;

    unlock();
  }
  return error;
}

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bool LOGGER::general_log_write(THD *thd, enum enum_server_command command,
                               const char *query, uint query_length)
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{
  bool error= FALSE;
  Log_event_handler **current_handler= general_log_handler_list;
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  char user_host_buff[MAX_USER_HOST_SIZE];
  Security_context *sctx= thd->security_ctx;
  ulong id;
  uint user_host_len= 0;
  time_t current_time;
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  if (thd)
    id= thd->thread_id;                 /* Normal thread */
  else
    id= 0;                              /* Log from connect handler */
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  lock_shared();
  if (!opt_log)
  {
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    unlock();
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    return 0;
  }
  user_host_len= strxnmov(user_host_buff, MAX_USER_HOST_SIZE,
                          sctx->priv_user ? sctx->priv_user : "", "[",
                          sctx->user ? sctx->user : "", "] @ ",
                          sctx->host ? sctx->host : "", " [",
                          sctx->ip ? sctx->ip : "", "]", NullS) -
                                                          user_host_buff;

  current_time= my_time(0);
  while (*current_handler)
    error+= (*current_handler++)->
      log_general(thd, current_time, user_host_buff,
                  user_host_len, id,
                  command_name[(uint) command].str,
                  command_name[(uint) command].length,
                  query, query_length,
                  thd->variables.character_set_client) || error;
  unlock();

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  return error;
}

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bool LOGGER::general_log_print(THD *thd, enum enum_server_command command,
                               const char *format, va_list args)
{
  uint message_buff_len= 0;
  char message_buff[MAX_LOG_BUFFER_SIZE];

  /* prepare message */
  if (format)
    message_buff_len= my_vsnprintf(message_buff, sizeof(message_buff),
                                   format, args);
  else
    message_buff[0]= '\0';

  return general_log_write(thd, command, message_buff, message_buff_len);
}

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void LOGGER::init_error_log(uint error_log_printer)
1037
{
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  if (error_log_printer & LOG_NONE)
  {
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    error_log_handler_list[0]= 0;
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    return;
  }

  switch (error_log_printer) {
  case LOG_FILE:
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    error_log_handler_list[0]= file_log_handler;
    error_log_handler_list[1]= 0;
    break;
    /* these two are disabled for now */
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  case LOG_TABLE:
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    DBUG_ASSERT(0);
    break;
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  case LOG_TABLE|LOG_FILE:
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    DBUG_ASSERT(0);
    break;
  }
}

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void LOGGER::init_slow_log(uint slow_log_printer)
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{
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  if (slow_log_printer & LOG_NONE)
  {
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    slow_log_handler_list[0]= 0;
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    return;
  }

  switch (slow_log_printer) {
  case LOG_FILE:
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    slow_log_handler_list[0]= file_log_handler;
    slow_log_handler_list[1]= 0;
    break;
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  case LOG_TABLE:
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    slow_log_handler_list[0]= table_log_handler;
    slow_log_handler_list[1]= 0;
    break;
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  case LOG_TABLE|LOG_FILE:
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    slow_log_handler_list[0]= file_log_handler;
    slow_log_handler_list[1]= table_log_handler;
    slow_log_handler_list[2]= 0;
    break;
  }
}

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void LOGGER::init_general_log(uint general_log_printer)
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{
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  if (general_log_printer & LOG_NONE)
  {
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    general_log_handler_list[0]= 0;
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    return;
  }

  switch (general_log_printer) {
  case LOG_FILE:
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    general_log_handler_list[0]= file_log_handler;
    general_log_handler_list[1]= 0;
    break;
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  case LOG_TABLE:
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    general_log_handler_list[0]= table_log_handler;
    general_log_handler_list[1]= 0;
    break;
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  case LOG_TABLE|LOG_FILE:
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    general_log_handler_list[0]= file_log_handler;
    general_log_handler_list[1]= table_log_handler;
    general_log_handler_list[2]= 0;
    break;
  }
}


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bool LOGGER::activate_log_handler(THD* thd, uint log_type)
{
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  MYSQL_QUERY_LOG *file_log;
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  bool res= FALSE;
  lock_exclusive();
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  switch (log_type) {
  case QUERY_LOG_SLOW:
    if (!opt_slow_log)
    {
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      file_log= file_log_handler->get_mysql_slow_log();

      file_log->open_slow_log(sys_var_slow_log_path.value);
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      if (table_log_handler->activate_log(thd, QUERY_LOG_SLOW))
      {
        /* Error printed by open table in activate_log() */
        res= TRUE;
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        file_log->close(0);
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      }
      else
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      {
        init_slow_log(log_output_options);
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        opt_slow_log= TRUE;
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      }
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    }
    break;
  case QUERY_LOG_GENERAL:
    if (!opt_log)
    {
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      file_log= file_log_handler->get_mysql_log();

      file_log->open_query_log(sys_var_general_log_path.value);
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      if (table_log_handler->activate_log(thd, QUERY_LOG_GENERAL))
      {
        /* Error printed by open table in activate_log() */
        res= TRUE;
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        file_log->close(0);
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      }
      else
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      {
        init_general_log(log_output_options);
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        opt_log= TRUE;
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      }
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    }
    break;
  default:
    DBUG_ASSERT(0);
  }
  unlock();
  return res;
}


void LOGGER::deactivate_log_handler(THD *thd, uint log_type)
{
  my_bool *tmp_opt= 0;
  MYSQL_LOG *file_log;

  switch (log_type) {
  case QUERY_LOG_SLOW:
    tmp_opt= &opt_slow_log;
    file_log= file_log_handler->get_mysql_slow_log();
    break;
  case QUERY_LOG_GENERAL:
    tmp_opt= &opt_log;
    file_log= file_log_handler->get_mysql_log();
    break;
  default:
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    assert(0);                                  // Impossible
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  }

  if (!(*tmp_opt))
    return;

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  lock_exclusive();
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  file_log->close(0);
  *tmp_opt= FALSE;
  unlock();
}


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/* the parameters are unused for the log tables */
bool Log_to_csv_event_handler::init()
{
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  return 0;
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}

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int LOGGER::set_handlers(uint error_log_printer,
                         uint slow_log_printer,
                         uint general_log_printer)
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{
  /* error log table is not supported yet */
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  DBUG_ASSERT(error_log_printer < LOG_TABLE);
1202

1203
  lock_exclusive();
1204

1205
  if ((slow_log_printer & LOG_TABLE || general_log_printer & LOG_TABLE) &&
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      !is_log_tables_initialized)
  {
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    slow_log_printer= (slow_log_printer & ~LOG_TABLE) | LOG_FILE;
    general_log_printer= (general_log_printer & ~LOG_TABLE) | LOG_FILE;
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    sql_print_error("Failed to initialize log tables. "
                    "Falling back to the old-fashioned logs");
  }

  init_error_log(error_log_printer);
  init_slow_log(slow_log_printer);
  init_general_log(general_log_printer);

  unlock();

  return 0;
}


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 /*
  Save position of binary log transaction cache.

  SYNPOSIS
    binlog_trans_log_savepos()

    thd      The thread to take the binlog data from
    pos      Pointer to variable where the position will be stored

  DESCRIPTION

    Save the current position in the binary log transaction cache into
    the variable pointed to by 'pos'
 */

static void
binlog_trans_log_savepos(THD *thd, my_off_t *pos)
{
  DBUG_ENTER("binlog_trans_log_savepos");
  DBUG_ASSERT(pos != NULL);
1245
  if (thd_get_ha_data(thd, binlog_hton) == NULL)
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    thd->binlog_setup_trx_data();
  binlog_trx_data *const trx_data=
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    (binlog_trx_data*) thd_get_ha_data(thd, binlog_hton);
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  DBUG_ASSERT(mysql_bin_log.is_open());
  *pos= trx_data->position();
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  DBUG_PRINT("return", ("*pos: %lu", (ulong) *pos));
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  DBUG_VOID_RETURN;
}


/*
  Truncate the binary log transaction cache.

  SYNPOSIS
    binlog_trans_log_truncate()

    thd      The thread to take the binlog data from
    pos      Position to truncate to

  DESCRIPTION

    Truncate the binary log to the given position. Will not change
    anything else.

 */
static void
binlog_trans_log_truncate(THD *thd, my_off_t pos)
{
  DBUG_ENTER("binlog_trans_log_truncate");
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  DBUG_PRINT("enter", ("pos: %lu", (ulong) pos));
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  DBUG_ASSERT(thd_get_ha_data(thd, binlog_hton) != NULL);
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  /* Only true if binlog_trans_log_savepos() wasn't called before */
  DBUG_ASSERT(pos != ~(my_off_t) 0);

  binlog_trx_data *const trx_data=
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    (binlog_trx_data*) thd_get_ha_data(thd, binlog_hton);
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  trx_data->truncate(pos);
  DBUG_VOID_RETURN;
}


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/*
  this function is mostly a placeholder.
1290
  conceptually, binlog initialization (now mostly done in MYSQL_BIN_LOG::open)
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  should be moved here.
*/

1294
int binlog_init(void *p)
1295
{
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  binlog_hton= (handlerton *)p;
  binlog_hton->state=opt_bin_log ? SHOW_OPTION_YES : SHOW_OPTION_NO;
  binlog_hton->db_type=DB_TYPE_BINLOG;
  binlog_hton->savepoint_offset= sizeof(my_off_t);
  binlog_hton->close_connection= binlog_close_connection;
  binlog_hton->savepoint_set= binlog_savepoint_set;
  binlog_hton->savepoint_rollback= binlog_savepoint_rollback;
  binlog_hton->commit= binlog_commit;
  binlog_hton->rollback= binlog_rollback;
  binlog_hton->prepare= binlog_prepare;
  binlog_hton->flags= HTON_NOT_USER_SELECTABLE | HTON_HIDDEN;
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  return 0;
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}

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static int binlog_close_connection(handlerton *hton, THD *thd)
1311
{
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  binlog_trx_data *const trx_data=
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    (binlog_trx_data*) thd_get_ha_data(thd, binlog_hton);
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  DBUG_ASSERT(trx_data->empty());
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  thd_set_ha_data(thd, binlog_hton, NULL);
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  trx_data->~binlog_trx_data();
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  my_free((uchar*)trx_data, MYF(0));
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  return 0;
}

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/*
  End a transaction.

  SYNOPSIS
    binlog_end_trans()

    thd      The thread whose transaction should be ended
    trx_data Pointer to the transaction data to use
    end_ev   The end event to use, or NULL
    all      True if the entire transaction should be ended, false if
             only the statement transaction should be ended.

  DESCRIPTION

    End the currently open transaction. The transaction can be either
    a real transaction (if 'all' is true) or a statement transaction
    (if 'all' is false).

    If 'end_ev' is NULL, the transaction is a rollback of only
    transactional tables, so the transaction cache will be truncated
    to either just before the last opened statement transaction (if
    'all' is false), or reset completely (if 'all' is true).
 */
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static int
1345 1346
binlog_end_trans(THD *thd, binlog_trx_data *trx_data,
                 Log_event *end_ev, bool all)
1347
{
1348
  DBUG_ENTER("binlog_end_trans");
1349 1350
  int error=0;
  IO_CACHE *trans_log= &trx_data->trans_log;
1351 1352
  DBUG_PRINT("enter", ("transaction: %s  end_ev: 0x%lx",
                       all ? "all" : "stmt", (long) end_ev));
1353 1354 1355
  DBUG_PRINT("info", ("thd->options={ %s%s}",
                      FLAGSTR(thd->options, OPTION_NOT_AUTOCOMMIT),
                      FLAGSTR(thd->options, OPTION_BEGIN)));
1356

1357 1358 1359 1360 1361 1362
  /*
    NULL denotes ROLLBACK with nothing to replicate: i.e., rollback of
    only transactional tables.  If the transaction contain changes to
    any non-transactiona tables, we need write the transaction and log
    a ROLLBACK last.
  */
1363
  if (end_ev != NULL)
1364
  {
1365
    /*
1366 1367 1368 1369
      Doing a commit or a rollback including non-transactional tables,
      i.e., ending a transaction where we might write the transaction
      cache to the binary log.

1370 1371 1372 1373 1374
      We can always end the statement when ending a transaction since
      transactions are not allowed inside stored functions.  If they
      were, we would have to ensure that we're not ending a statement
      inside a stored function.
     */
1375
    thd->binlog_flush_pending_rows_event(TRUE);
1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396
    /*
      We write the transaction cache to the binary log if either we're
      committing the entire transaction, or if we are doing an
      autocommit outside a transaction.
     */
    if (all || !(thd->options & (OPTION_BEGIN | OPTION_NOT_AUTOCOMMIT)))
    {
      error= mysql_bin_log.write(thd, &trx_data->trans_log, end_ev);
      trx_data->reset();
      /*
        We need to step the table map version after writing the
        transaction cache to disk.
      */
      mysql_bin_log.update_table_map_version();
      statistic_increment(binlog_cache_use, &LOCK_status);
      if (trans_log->disk_writes != 0)
      {
        statistic_increment(binlog_cache_disk_use, &LOCK_status);
        trans_log->disk_writes= 0;
      }
    }
1397 1398 1399
  }
  else
  {
1400 1401 1402
    /*
      If rolling back an entire transaction or a single statement not
      inside a transaction, we reset the transaction cache.
1403

1404 1405 1406 1407 1408
      If rolling back a statement in a transaction, we truncate the
      transaction cache to remove the statement.
     */
    if (all || !(thd->options & (OPTION_BEGIN | OPTION_NOT_AUTOCOMMIT)))
      trx_data->reset();
1409 1410
    else                                        // ...statement
      trx_data->truncate(trx_data->before_stmt_pos);
1411 1412 1413 1414 1415 1416 1417

    /*
      We need to step the table map version on a rollback to ensure
      that a new table map event is generated instead of the one that
      was written to the thrown-away transaction cache.
    */
    mysql_bin_log.update_table_map_version();
1418
  }
1419

1420
  DBUG_RETURN(error);
1421 1422
}

1423
static int binlog_prepare(handlerton *hton, THD *thd, bool all)
1424 1425 1426 1427 1428
{
  /*
    do nothing.
    just pretend we can do 2pc, so that MySQL won't
    switch to 1pc.
1429
    real work will be done in MYSQL_BIN_LOG::log_xid()
1430 1431 1432 1433
  */
  return 0;
}

1434
static int binlog_commit(handlerton *hton, THD *thd, bool all)
1435 1436
{
  DBUG_ENTER("binlog_commit");
1437
  binlog_trx_data *const trx_data=
1438
    (binlog_trx_data*) thd_get_ha_data(thd, binlog_hton);
1439

1440
  if (trx_data->empty())
1441
  {
1442
    // we're here because trans_log was flushed in MYSQL_BIN_LOG::log_xid()
1443
    trx_data->reset();
1444 1445
    DBUG_RETURN(0);
  }
1446
  if (all)
1447 1448 1449
  {
    Query_log_event qev(thd, STRING_WITH_LEN("COMMIT"), TRUE, FALSE);
    qev.error_code= 0; // see comment in MYSQL_LOG::write(THD, IO_CACHE)
1450 1451
    int error= binlog_end_trans(thd, trx_data, &qev, all);
    DBUG_RETURN(error);
1452 1453
  }
  else
1454 1455 1456 1457
  {
    int error= binlog_end_trans(thd, trx_data, &invisible_commit, all);
    DBUG_RETURN(error);
  }
1458 1459
}

1460
static int binlog_rollback(handlerton *hton, THD *thd, bool all)
1461 1462
{
  DBUG_ENTER("binlog_rollback");
1463 1464
  int error=0;
  binlog_trx_data *const trx_data=
1465
    (binlog_trx_data*) thd_get_ha_data(thd, binlog_hton);
1466 1467 1468 1469 1470 1471

  if (trx_data->empty()) {
    trx_data->reset();
    DBUG_RETURN(0);
  }

1472
  /*
1473 1474 1475 1476
    Update the binary log with a BEGIN/ROLLBACK block if we have
    cached some queries and we updated some non-transactional
    table. Such cases should be rare (updating a
    non-transactional table inside a transaction...)
1477
  */
1478 1479
  if (unlikely(thd->transaction.all.modified_non_trans_table || 
               (thd->options & OPTION_KEEP_LOG)))
1480
  {
1481
    Query_log_event qev(thd, STRING_WITH_LEN("ROLLBACK"), TRUE, FALSE);
1482
    qev.error_code= 0; // see comment in MYSQL_LOG::write(THD, IO_CACHE)
1483
    error= binlog_end_trans(thd, trx_data, &qev, all);
1484
  }
1485
  else
1486
    error= binlog_end_trans(thd, trx_data, 0, all);
1487 1488 1489
  DBUG_RETURN(error);
}

1490 1491 1492 1493 1494 1495
/**
  @note
  How do we handle this (unlikely but legal) case:
  @verbatim
    [transaction] + [update to non-trans table] + [rollback to savepoint] ?
  @endverbatim
1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513
  The problem occurs when a savepoint is before the update to the
  non-transactional table. Then when there's a rollback to the savepoint, if we
  simply truncate the binlog cache, we lose the part of the binlog cache where
  the update is. If we want to not lose it, we need to write the SAVEPOINT
  command and the ROLLBACK TO SAVEPOINT command to the binlog cache. The latter
  is easy: it's just write at the end of the binlog cache, but the former
  should be *inserted* to the place where the user called SAVEPOINT. The
  solution is that when the user calls SAVEPOINT, we write it to the binlog
  cache (so no need to later insert it). As transactions are never intermixed
  in the binary log (i.e. they are serialized), we won't have conflicts with
  savepoint names when using mysqlbinlog or in the slave SQL thread.
  Then when ROLLBACK TO SAVEPOINT is called, if we updated some
  non-transactional table, we don't truncate the binlog cache but instead write
  ROLLBACK TO SAVEPOINT to it; otherwise we truncate the binlog cache (which
  will chop the SAVEPOINT command from the binlog cache, which is good as in
  that case there is no need to have it in the binlog).
*/

1514
static int binlog_savepoint_set(handlerton *hton, THD *thd, void *sv)
1515 1516 1517
{
  DBUG_ENTER("binlog_savepoint_set");

1518
  binlog_trans_log_savepos(thd, (my_off_t*) sv);
1519
  /* Write it to the binary log */
1520 1521 1522 1523 1524
  
  int const error=
    thd->binlog_query(THD::STMT_QUERY_TYPE,
                      thd->query, thd->query_length, TRUE, FALSE);
  DBUG_RETURN(error);
1525 1526
}

1527
static int binlog_savepoint_rollback(handlerton *hton, THD *thd, void *sv)
1528 1529 1530 1531 1532 1533 1534 1535
{
  DBUG_ENTER("binlog_savepoint_rollback");

  /*
    Write ROLLBACK TO SAVEPOINT to the binlog cache if we have updated some
    non-transactional table. Otherwise, truncate the binlog cache starting
    from the SAVEPOINT command.
  */
1536 1537
  if (unlikely(thd->transaction.all.modified_non_trans_table || 
               (thd->options & OPTION_KEEP_LOG)))
1538
  {
1539
    int error=
1540 1541 1542
      thd->binlog_query(THD::STMT_QUERY_TYPE,
                        thd->query, thd->query_length, TRUE, FALSE);
    DBUG_RETURN(error);
1543
  }
1544
  binlog_trans_log_truncate(thd, *(my_off_t*)sv);
1545 1546 1547
  DBUG_RETURN(0);
}

1548

1549 1550 1551 1552 1553
int check_binlog_magic(IO_CACHE* log, const char** errmsg)
{
  char magic[4];
  DBUG_ASSERT(my_b_tell(log) == 0);

1554
  if (my_b_read(log, (uchar*) magic, sizeof(magic)))
1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568
  {
    *errmsg = "I/O error reading the header from the binary log";
    sql_print_error("%s, errno=%d, io cache code=%d", *errmsg, my_errno,
		    log->error);
    return 1;
  }
  if (memcmp(magic, BINLOG_MAGIC, sizeof(magic)))
  {
    *errmsg = "Binlog has bad magic number;  It's not a binary log file that can be used by this version of MySQL";
    return 1;
  }
  return 0;
}

1569

1570 1571 1572 1573 1574
File open_binlog(IO_CACHE *log, const char *log_file_name, const char **errmsg)
{
  File file;
  DBUG_ENTER("open_binlog");

1575 1576
  if ((file = my_open(log_file_name, O_RDONLY | O_BINARY | O_SHARE, 
                      MYF(MY_WME))) < 0)
1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602
  {
    sql_print_error("Failed to open log (file '%s', errno %d)",
                    log_file_name, my_errno);
    *errmsg = "Could not open log file";
    goto err;
  }
  if (init_io_cache(log, file, IO_SIZE*2, READ_CACHE, 0, 0,
                    MYF(MY_WME|MY_DONT_CHECK_FILESIZE)))
  {
    sql_print_error("Failed to create a cache on log (file '%s')",
                    log_file_name);
    *errmsg = "Could not open log file";
    goto err;
  }
  if (check_binlog_magic(log,errmsg))
    goto err;
  DBUG_RETURN(file);

err:
  if (file >= 0)
  {
    my_close(file,MYF(0));
    end_io_cache(log);
  }
  DBUG_RETURN(-1);
}
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1603

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1604 1605
#ifdef __NT__
static int eventSource = 0;
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1606

1607
static void setup_windows_event_source()
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1608
{
1609
  HKEY    hRegKey= NULL;
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1610 1611 1612
  DWORD   dwError= 0;
  TCHAR   szPath[MAX_PATH];
  DWORD dwTypes;
1613

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1614 1615 1616
  if (eventSource)               // Ensure that we are only called once
    return;
  eventSource= 1;
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1617

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1618
  // Create the event source registry key
1619
  dwError= RegCreateKey(HKEY_LOCAL_MACHINE,
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1620 1621
                          "SYSTEM\\CurrentControlSet\\Services\\EventLog\\Application\\MySQL", 
                          &hRegKey);
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1622

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1623 1624
  /* Name of the PE module that contains the message resource */
  GetModuleFileName(NULL, szPath, MAX_PATH);
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1625

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1626
  /* Register EventMessageFile */
1627
  dwError = RegSetValueEx(hRegKey, "EventMessageFile", 0, REG_EXPAND_SZ,
1628
                          (PBYTE) szPath, (DWORD) (strlen(szPath) + 1));
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1629

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1630 1631 1632 1633 1634
  /* Register supported event types */
  dwTypes= (EVENTLOG_ERROR_TYPE | EVENTLOG_WARNING_TYPE |
            EVENTLOG_INFORMATION_TYPE);
  dwError= RegSetValueEx(hRegKey, "TypesSupported", 0, REG_DWORD,
                         (LPBYTE) &dwTypes, sizeof dwTypes);
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1635

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1636
  RegCloseKey(hRegKey);
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1637 1638
}

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1639
#endif /* __NT__ */
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1640 1641


1642 1643 1644 1645 1646 1647 1648 1649
/**
  Find a unique filename for 'filename.#'.

  Set '#' to a number as low as possible.

  @return
    nonzero if not possible to get unique filename
*/
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1650 1651 1652

static int find_uniq_filename(char *name)
{
1653 1654 1655 1656
  long                  number;
  uint                  i;
  char                  buff[FN_REFLEN];
  struct st_my_dir     *dir_info;
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1657
  reg1 struct fileinfo *file_info;
1658
  ulong                 max_found=0;
1659 1660
  size_t		buf_length, length;
  char			*start, *end;
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1661 1662
  DBUG_ENTER("find_uniq_filename");

1663 1664 1665
  length= dirname_part(buff, name, &buf_length);
  start=  name + length;
  end=    strend(start);
1666

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1667
  *end='.';
1668
  length= (size_t) (end-start+1);
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1669 1670 1671 1672 1673 1674 1675 1676 1677

  if (!(dir_info = my_dir(buff,MYF(MY_DONT_SORT))))
  {						// This shouldn't happen
    strmov(end,".1");				// use name+1
    DBUG_RETURN(0);
  }
  file_info= dir_info->dir_entry;
  for (i=dir_info->number_off_files ; i-- ; file_info++)
  {
1678
    if (bcmp((uchar*) file_info->name, (uchar*) start, length) == 0 &&
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1679 1680 1681 1682 1683 1684 1685 1686
	test_if_number(file_info->name+length, &number,0))
    {
      set_if_bigger(max_found,(ulong) number);
    }
  }
  my_dirend(dir_info);

  *end++='.';
1687
  sprintf(end,"%06ld",max_found+1);
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1688 1689 1690
  DBUG_RETURN(0);
}

1691

1692
void MYSQL_LOG::init(enum_log_type log_type_arg,
1693
                     enum cache_type io_cache_type_arg)
1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762
{
  DBUG_ENTER("MYSQL_LOG::init");
  log_type= log_type_arg;
  io_cache_type= io_cache_type_arg;
  DBUG_PRINT("info",("log_type: %d", log_type));
  DBUG_VOID_RETURN;
}


/*
  Open a (new) log file.

  SYNOPSIS
    open()

    log_name            The name of the log to open
    log_type_arg        The type of the log. E.g. LOG_NORMAL
    new_name            The new name for the logfile. This is only needed
                        when the method is used to open the binlog file.
    io_cache_type_arg   The type of the IO_CACHE to use for this log file

  DESCRIPTION
    Open the logfile, init IO_CACHE and write startup messages
    (in case of general and slow query logs).

  RETURN VALUES
    0   ok
    1   error
*/

bool MYSQL_LOG::open(const char *log_name, enum_log_type log_type_arg,
                     const char *new_name, enum cache_type io_cache_type_arg)
{
  char buff[FN_REFLEN];
  File file= -1;
  int open_flags= O_CREAT | O_BINARY;
  DBUG_ENTER("MYSQL_LOG::open");
  DBUG_PRINT("enter", ("log_type: %d", (int) log_type_arg));

  write_error= 0;

  init(log_type_arg, io_cache_type_arg);

  if (!(name= my_strdup(log_name, MYF(MY_WME))))
  {
    name= (char *)log_name; // for the error message
    goto err;
  }

  if (new_name)
    strmov(log_file_name, new_name);
  else if (generate_new_name(log_file_name, name))
    goto err;

  if (io_cache_type == SEQ_READ_APPEND)
    open_flags |= O_RDWR | O_APPEND;
  else
    open_flags |= O_WRONLY | (log_type == LOG_BIN ? 0 : O_APPEND);

  db[0]= 0;

  if ((file= my_open(log_file_name, open_flags,
                     MYF(MY_WME | ME_WAITTANG))) < 0 ||
      init_io_cache(&log_file, file, IO_SIZE, io_cache_type,
                    my_tell(file, MYF(MY_WME)), 0,
                    MYF(MY_WME | MY_NABP |
                        ((log_type == LOG_BIN) ? MY_WAIT_IF_FULL : 0))))
    goto err;

1763
  if (log_type == LOG_NORMAL)
1764 1765
  {
    char *end;
1766
    int len=my_snprintf(buff, sizeof(buff), "%s, Version: %s (%s). "
1767
#ifdef EMBEDDED_LIBRARY
1768 1769
                        "embedded library\n",
                        my_progname, server_version, MYSQL_COMPILATION_COMMENT
1770 1771
#elif __NT__
			"started with:\nTCP Port: %d, Named Pipe: %s\n",
1772 1773
                        my_progname, server_version, MYSQL_COMPILATION_COMMENT,
                        mysqld_port, mysqld_unix_port
1774 1775
#else
			"started with:\nTcp port: %d  Unix socket: %s\n",
1776 1777
                        my_progname, server_version, MYSQL_COMPILATION_COMMENT,
                        mysqld_port, mysqld_unix_port
1778 1779 1780 1781
#endif
                       );
    end= strnmov(buff + len, "Time                 Id Command    Argument\n",
                 sizeof(buff) - len);
1782
    if (my_b_write(&log_file, (uchar*) buff, (uint) (end-buff)) ||
1783 1784 1785 1786
	flush_io_cache(&log_file))
      goto err;
  }

1787
  log_state= LOG_OPENED;
1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798
  DBUG_RETURN(0);

err:
  sql_print_error("Could not use %s for logging (error %d). \
Turning logging off for the whole duration of the MySQL server process. \
To turn it on again: fix the cause, \
shutdown the MySQL server and restart it.", name, errno);
  if (file >= 0)
    my_close(file, MYF(0));
  end_io_cache(&log_file);
  safeFree(name);
1799
  log_state= LOG_CLOSED;
1800 1801 1802
  DBUG_RETURN(1);
}

1803
MYSQL_LOG::MYSQL_LOG()
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1804 1805
  : name(0), write_error(FALSE), inited(FALSE), log_type(LOG_UNKNOWN),
    log_state(LOG_CLOSED)
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{
  /*
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1808 1809
    We don't want to initialize LOCK_Log here as such initialization depends on
    safe_mutex (when using safe_mutex) which depends on MY_INIT(), which is
1810
    called only in main(). Doing initialization here would make it happen
1811
    before main().
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1812
  */
1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840
  bzero((char*) &log_file, sizeof(log_file));
}

void MYSQL_LOG::init_pthread_objects()
{
  DBUG_ASSERT(inited == 0);
  inited= 1;
  (void) pthread_mutex_init(&LOCK_log, MY_MUTEX_INIT_SLOW);
}

/*
  Close the log file

  SYNOPSIS
    close()
    exiting     Bitmask. For the slow and general logs the only used bit is
                LOG_CLOSE_TO_BE_OPENED. This is used if we intend to call
                open at once after close.

  NOTES
    One can do an open on the object at once after doing a close.
    The internal structures are not freed until cleanup() is called
*/

void MYSQL_LOG::close(uint exiting)
{					// One can't set log_type here!
  DBUG_ENTER("MYSQL_LOG::close");
  DBUG_PRINT("enter",("exiting: %d", (int) exiting));
1841
  if (log_state == LOG_OPENED)
1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857
  {
    end_io_cache(&log_file);

    if (my_sync(log_file.file, MYF(MY_WME)) && ! write_error)
    {
      write_error= 1;
      sql_print_error(ER(ER_ERROR_ON_WRITE), name, errno);
    }

    if (my_close(log_file.file, MYF(MY_WME)) && ! write_error)
    {
      write_error= 1;
      sql_print_error(ER(ER_ERROR_ON_WRITE), name, errno);
    }
  }

1858
  log_state= (exiting & LOG_CLOSE_TO_BE_OPENED) ? LOG_TO_BE_OPENED : LOG_CLOSED;
1859 1860
  safeFree(name);
  DBUG_VOID_RETURN;
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1861 1862
}

1863
/** This is called only once. */
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1864

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1865
void MYSQL_LOG::cleanup()
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1866
{
1867
  DBUG_ENTER("cleanup");
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1868
  if (inited)
1869
  {
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1870
    inited= 0;
1871
    (void) pthread_mutex_destroy(&LOCK_log);
1872
    close(0);
1873
  }
1874
  DBUG_VOID_RETURN;
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1875 1876
}

1877

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1878
int MYSQL_LOG::generate_new_name(char *new_name, const char *log_name)
1879
{
1880 1881
  fn_format(new_name, log_name, mysql_data_home, "", 4);
  if (log_type == LOG_BIN)
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1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894
  {
    if (!fn_ext(log_name)[0])
    {
      if (find_uniq_filename(new_name))
      {
	sql_print_error(ER(ER_NO_UNIQUE_LOGFILE), log_name);
	return 1;
      }
    }
  }
  return 0;
}

1895

1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907
/*
  Reopen the log file

  SYNOPSIS
    reopen_file()

  DESCRIPTION
    Reopen the log file. The method is used during FLUSH LOGS
    and locks LOCK_log mutex
*/


1908
void MYSQL_QUERY_LOG::reopen_file()
1909
{
1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925
  char *save_name;

  DBUG_ENTER("MYSQL_LOG::reopen_file");
  if (!is_open())
  {
    DBUG_PRINT("info",("log is closed"));
    DBUG_VOID_RETURN;
  }

  pthread_mutex_lock(&LOCK_log);

  save_name= name;
  name= 0;				// Don't free name
  close(LOG_CLOSE_TO_BE_OPENED);

  /*
1926
     Note that at this point, log_state != LOG_CLOSED (important for is_open()).
1927 1928
  */

1929
  open(save_name, log_type, 0, io_cache_type);
1930 1931 1932 1933
  my_free(save_name, MYF(0));

  pthread_mutex_unlock(&LOCK_log);

1934
  DBUG_VOID_RETURN;
1935 1936
}

1937

1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962
/*
  Write a command to traditional general log file

  SYNOPSIS
    write()

    event_time        command start timestamp
    user_host         the pointer to the string with user@host info
    user_host_len     length of the user_host string. this is computed once
                      and passed to all general log  event handlers
    thread_id         Id of the thread, issued a query
    command_type      the type of the command being logged
    command_type_len  the length of the string above
    sql_text          the very text of the query being executed
    sql_text_len      the length of sql_text string

  DESCRIPTION

   Log given command to to normal (not rotable) log file

  RETURN
    FASE - OK
    TRUE - error occured
*/

1963 1964 1965 1966
bool MYSQL_QUERY_LOG::write(time_t event_time, const char *user_host,
                            uint user_host_len, int thread_id,
                            const char *command_type, uint command_type_len,
                            const char *sql_text, uint sql_text_len)
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{
1968 1969
  char buff[32];
  uint length= 0;
1970
  char local_time_buff[MAX_TIME_SIZE];
1971 1972 1973
  struct tm start;
  uint time_buff_len= 0;

1974 1975
  (void) pthread_mutex_lock(&LOCK_log);

1976 1977 1978 1979 1980 1981 1982 1983 1984 1985
  /* Test if someone closed between the is_open test and lock */
  if (is_open())
  {
    /* Note that my_b_write() assumes it knows the length for this */
      if (event_time != last_time)
      {
        last_time= event_time;

        localtime_r(&event_time, &start);

1986
        time_buff_len= my_snprintf(local_time_buff, MAX_TIME_SIZE,
1987 1988 1989 1990 1991
                                   "%02d%02d%02d %2d:%02d:%02d",
                                   start.tm_year % 100, start.tm_mon + 1,
                                   start.tm_mday, start.tm_hour,
                                   start.tm_min, start.tm_sec);

1992
        if (my_b_write(&log_file, (uchar*) local_time_buff, time_buff_len))
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          goto err;
      }
      else
1996
        if (my_b_write(&log_file, (uchar*) "\t\t" ,2) < 0)
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          goto err;

1999
      /* command_type, thread_id */
2000
      length= my_snprintf(buff, 32, "%5ld ", (long) thread_id);
2001

2002
    if (my_b_write(&log_file, (uchar*) buff, length))
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      goto err;

2005
    if (my_b_write(&log_file, (uchar*) command_type, command_type_len))
2006 2007
      goto err;

2008
    if (my_b_write(&log_file, (uchar*) "\t", 1))
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      goto err;

    /* sql_text */
2012
    if (my_b_write(&log_file, (uchar*) sql_text, sql_text_len))
2013 2014
      goto err;

2015
    if (my_b_write(&log_file, (uchar*) "\n", 1) ||
2016 2017 2018 2019
        flush_io_cache(&log_file))
      goto err;
  }

2020
  (void) pthread_mutex_unlock(&LOCK_log);
2021 2022 2023 2024 2025 2026 2027 2028
  return FALSE;
err:

  if (!write_error)
  {
    write_error= 1;
    sql_print_error(ER(ER_ERROR_ON_WRITE), name, errno);
  }
2029
  (void) pthread_mutex_unlock(&LOCK_log);
2030
  return TRUE;
2031 2032
}

2033

2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045
/*
  Log a query to the traditional slow log file

  SYNOPSIS
    write()

    thd               THD of the query
    current_time      current timestamp
    query_start_arg   command start timestamp
    user_host         the pointer to the string with user@host info
    user_host_len     length of the user_host string. this is computed once
                      and passed to all general log event handlers
2046 2047
    query_utime       Amount of time the query took to execute (in microseconds)
    lock_utime        Amount of time the query was locked (in microseconds)
2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062
    is_command        The flag, which determines, whether the sql_text is a
                      query or an administrator command.
    sql_text          the very text of the query or administrator command
                      processed
    sql_text_len      the length of sql_text string

  DESCRIPTION

   Log a query to the slow log file.

  RETURN
    FALSE - OK
    TRUE - error occured
*/

2063 2064
bool MYSQL_QUERY_LOG::write(THD *thd, time_t current_time,
                            time_t query_start_arg, const char *user_host,
2065 2066
                            uint user_host_len, ulonglong query_utime,
                            ulonglong lock_utime, bool is_command,
2067
                            const char *sql_text, uint sql_text_len)
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{
2069
  bool error= 0;
2070
  DBUG_ENTER("MYSQL_QUERY_LOG::write");
2071

2072 2073
  (void) pthread_mutex_lock(&LOCK_log);

2074
  if (!is_open())
2075 2076
  {
    (void) pthread_mutex_unlock(&LOCK_log);
2077
    DBUG_RETURN(0);
2078
  }
2079 2080 2081 2082 2083

  if (is_open())
  {						// Safety agains reopen
    int tmp_errno= 0;
    char buff[80], *end;
2084
    char query_time_buff[22+7], lock_time_buff[22+7];
2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102
    uint buff_len;
    end= buff;

    if (!(specialflag & SPECIAL_SHORT_LOG_FORMAT))
    {
      if (current_time != last_time)
      {
        last_time= current_time;
        struct tm start;
        localtime_r(&current_time, &start);

        buff_len= my_snprintf(buff, sizeof buff,
                              "# Time: %02d%02d%02d %2d:%02d:%02d\n",
                              start.tm_year % 100, start.tm_mon + 1,
                              start.tm_mday, start.tm_hour,
                              start.tm_min, start.tm_sec);

        /* Note that my_b_write() assumes it knows the length for this */
2103
        if (my_b_write(&log_file, (uchar*) buff, buff_len))
2104 2105
          tmp_errno= errno;
      }
2106 2107
      const uchar uh[]= "# User@Host: ";
      if (my_b_write(&log_file, uh, sizeof(uh) - 1))
2108
        tmp_errno= errno;
2109
      if (my_b_write(&log_file, (uchar*) user_host, user_host_len))
2110
        tmp_errno= errno;
2111
      if (my_b_write(&log_file, (uchar*) "\n", 1))
2112 2113 2114
        tmp_errno= errno;
    }
    /* For slow query log */
2115 2116
    sprintf(query_time_buff, "%.6f", ulonglong2double(query_utime)/1000000.0);
    sprintf(lock_time_buff,  "%.6f", ulonglong2double(lock_utime)/1000000.0);
2117
    if (my_b_printf(&log_file,
2118
                    "# Query_time: %s  Lock_time: %s"
2119
                    " Rows_sent: %lu  Rows_examined: %lu\n",
2120
                    query_time_buff, lock_time_buff,
2121 2122 2123 2124 2125 2126 2127 2128 2129
                    (ulong) thd->sent_row_count,
                    (ulong) thd->examined_row_count) == (uint) -1)
      tmp_errno= errno;
    if (thd->db && strcmp(thd->db, db))
    {						// Database changed
      if (my_b_printf(&log_file,"use %s;\n",thd->db) == (uint) -1)
        tmp_errno= errno;
      strmov(db,thd->db);
    }
2130
    if (thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt)
2131 2132
    {
      end=strmov(end, ",last_insert_id=");
2133 2134 2135
      end=longlong10_to_str((longlong)
                            thd->first_successful_insert_id_in_prev_stmt_for_binlog,
                            end, -10);
2136 2137
    }
    // Save value if we do an insert.
2138
    if (thd->auto_inc_intervals_in_cur_stmt_for_binlog.nb_elements() > 0)
2139 2140 2141 2142
    {
      if (!(specialflag & SPECIAL_SHORT_LOG_FORMAT))
      {
        end=strmov(end,",insert_id=");
2143 2144 2145
        end=longlong10_to_str((longlong)
                              thd->auto_inc_intervals_in_cur_stmt_for_binlog.minimum(),
                              end, -10);
2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160
      }
    }

    /*
      This info used to show up randomly, depending on whether the query
      checked the query start time or not. now we always write current
      timestamp to the slow log
    */
    end= strmov(end, ",timestamp=");
    end= int10_to_str((long) current_time, end, 10);

    if (end != buff)
    {
      *end++=';';
      *end='\n';
2161 2162
      if (my_b_write(&log_file, (uchar*) "SET ", 4) ||
          my_b_write(&log_file, (uchar*) buff + 1, (uint) (end-buff)))
2163 2164 2165 2166 2167 2168
        tmp_errno= errno;
    }
    if (is_command)
    {
      end= strxmov(buff, "# administrator command: ", NullS);
      buff_len= (ulong) (end - buff);
2169
      my_b_write(&log_file, (uchar*) buff, buff_len);
2170
    }
2171 2172
    if (my_b_write(&log_file, (uchar*) sql_text, sql_text_len) ||
        my_b_write(&log_file, (uchar*) ";\n",2) ||
2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184
        flush_io_cache(&log_file))
      tmp_errno= errno;
    if (tmp_errno)
    {
      error= 1;
      if (! write_error)
      {
        write_error= 1;
        sql_print_error(ER(ER_ERROR_ON_WRITE), name, error);
      }
    }
  }
2185
  (void) pthread_mutex_unlock(&LOCK_log);
2186
  DBUG_RETURN(error);
2187 2188
}

2189

2190 2191 2192 2193 2194
/**
  @todo
  The following should be using fn_format();  We just need to
  first change fn_format() to cut the file name if it's too long.
*/
2195
const char *MYSQL_LOG::generate_name(const char *log_name,
2196 2197
                                      const char *suffix,
                                      bool strip_ext, char *buff)
2198 2199 2200
{
  if (!log_name || !log_name[0])
  {
2201 2202 2203
    strmake(buff, pidfile_name, FN_REFLEN - strlen(suffix) - 1);
    return (const char *)
      fn_format(buff, buff, "", suffix, MYF(MY_REPLACE_EXT|MY_REPLACE_DIR));
2204 2205 2206 2207
  }
  // get rid of extension if the log is binary to avoid problems
  if (strip_ext)
  {
2208 2209 2210
    char *p= fn_ext(log_name);
    uint length= (uint) (p - log_name);
    strmake(buff, log_name, min(length, FN_REFLEN));
2211 2212 2213 2214 2215
    return (const char*)buff;
  }
  return log_name;
}

2216

2217

2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273
MYSQL_BIN_LOG::MYSQL_BIN_LOG()
  :bytes_written(0), prepared_xids(0), file_id(1), open_count(1),
   need_start_event(TRUE), m_table_map_version(0),
   description_event_for_exec(0), description_event_for_queue(0)
{
  /*
    We don't want to initialize locks here as such initialization depends on
    safe_mutex (when using safe_mutex) which depends on MY_INIT(), which is
    called only in main(). Doing initialization here would make it happen
    before main().
  */
  index_file_name[0] = 0;
  bzero((char*) &index_file, sizeof(index_file));
}

/* this is called only once */

void MYSQL_BIN_LOG::cleanup()
{
  DBUG_ENTER("cleanup");
  if (inited)
  {
    inited= 0;
    close(LOG_CLOSE_INDEX|LOG_CLOSE_STOP_EVENT);
    delete description_event_for_queue;
    delete description_event_for_exec;
    (void) pthread_mutex_destroy(&LOCK_log);
    (void) pthread_mutex_destroy(&LOCK_index);
    (void) pthread_cond_destroy(&update_cond);
  }
  DBUG_VOID_RETURN;
}


/* Init binlog-specific vars */
void MYSQL_BIN_LOG::init(bool no_auto_events_arg, ulong max_size_arg)
{
  DBUG_ENTER("MYSQL_BIN_LOG::init");
  no_auto_events= no_auto_events_arg;
  max_size= max_size_arg;
  DBUG_PRINT("info",("max_size: %lu", max_size));
  DBUG_VOID_RETURN;
}


void MYSQL_BIN_LOG::init_pthread_objects()
{
  DBUG_ASSERT(inited == 0);
  inited= 1;
  (void) pthread_mutex_init(&LOCK_log, MY_MUTEX_INIT_SLOW);
  (void) pthread_mutex_init(&LOCK_index, MY_MUTEX_INIT_SLOW);
  (void) pthread_cond_init(&update_cond, 0);
}


bool MYSQL_BIN_LOG::open_index_file(const char *index_file_name_arg,
2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298
                                const char *log_name)
{
  File index_file_nr= -1;
  DBUG_ASSERT(!my_b_inited(&index_file));

  /*
    First open of this class instance
    Create an index file that will hold all file names uses for logging.
    Add new entries to the end of it.
  */
  myf opt= MY_UNPACK_FILENAME;
  if (!index_file_name_arg)
  {
    index_file_name_arg= log_name;    // Use same basename for index file
    opt= MY_UNPACK_FILENAME | MY_REPLACE_EXT;
  }
  fn_format(index_file_name, index_file_name_arg, mysql_data_home,
            ".index", opt);
  if ((index_file_nr= my_open(index_file_name,
                              O_RDWR | O_CREAT | O_BINARY ,
                              MYF(MY_WME))) < 0 ||
       my_sync(index_file_nr, MYF(MY_WME)) ||
       init_io_cache(&index_file, index_file_nr,
                     IO_SIZE, WRITE_CACHE,
                     my_seek(index_file_nr,0L,MY_SEEK_END,MYF(0)),
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2299
			0, MYF(MY_WME | MY_WAIT_IF_FULL)))
2300 2301 2302 2303 2304 2305 2306 2307
  {
    if (index_file_nr >= 0)
      my_close(index_file_nr,MYF(0));
    return TRUE;
  }
  return FALSE;
}

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2308

2309
/**
2310
  Open a (new) binlog file.
2311

2312
  - Open the log file and the index file. Register the new
2313
  file name in it
2314
  - When calling this when the file is in use, you must have a locks
2315
  on LOCK_log and LOCK_index.
2316

2317
  @retval
2318
    0	ok
2319
  @retval
2320 2321 2322
    1	error
*/

2323 2324 2325 2326 2327 2328 2329
bool MYSQL_BIN_LOG::open(const char *log_name,
                         enum_log_type log_type_arg,
                         const char *new_name,
                         enum cache_type io_cache_type_arg,
                         bool no_auto_events_arg,
                         ulong max_size_arg,
                         bool null_created_arg)
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2330
{
2331
  File file= -1;
2332
  DBUG_ENTER("MYSQL_BIN_LOG::open");
2333
  DBUG_PRINT("enter",("log_type: %d",(int) log_type_arg));
2334 2335

  write_error=0;
2336

2337 2338 2339
  /* open the main log file */
  if (MYSQL_LOG::open(log_name, log_type_arg, new_name, io_cache_type_arg))
    DBUG_RETURN(1);                            /* all warnings issued */
2340

2341
  init(no_auto_events_arg, max_size_arg);
2342

2343
  open_count++;
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2344

2345
  DBUG_ASSERT(log_type == LOG_BIN);
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2346 2347

  {
2348 2349 2350 2351 2352 2353 2354 2355 2356 2357
    bool write_file_name_to_index_file=0;

    if (!my_b_filelength(&log_file))
    {
      /*
	The binary log file was empty (probably newly created)
	This is the normal case and happens when the user doesn't specify
	an extension for the binary log files.
	In this case we write a standard header to it.
      */
2358
      if (my_b_safe_write(&log_file, (uchar*) BINLOG_MAGIC,
2359
			  BIN_LOG_HEADER_SIZE))
2360
        goto err;
2361 2362
      bytes_written+= BIN_LOG_HEADER_SIZE;
      write_file_name_to_index_file= 1;
2363
    }
2364

2365
    DBUG_ASSERT(my_b_inited(&index_file) != 0);
2366 2367
    reinit_io_cache(&index_file, WRITE_CACHE,
                    my_b_filelength(&index_file), 0, 0);
2368
    if (need_start_event && !no_auto_events)
2369
    {
2370 2371 2372 2373 2374
      /*
        In 4.x we set need_start_event=0 here, but in 5.0 we want a Start event
        even if this is not the very first binlog.
      */
      Format_description_log_event s(BINLOG_VERSION);
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2375 2376 2377 2378 2379 2380
      /*
        don't set LOG_EVENT_BINLOG_IN_USE_F for SEQ_READ_APPEND io_cache
        as we won't be able to reset it later
      */
      if (io_cache_type == WRITE_CACHE)
        s.flags|= LOG_EVENT_BINLOG_IN_USE_F;
2381 2382
      if (!s.is_valid())
        goto err;
2383
      s.dont_set_created= null_created_arg;
2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398
      if (s.write(&log_file))
        goto err;
      bytes_written+= s.data_written;
    }
    if (description_event_for_queue &&
        description_event_for_queue->binlog_version>=4)
    {
      /*
        This is a relay log written to by the I/O slave thread.
        Write the event so that others can later know the format of this relay
        log.
        Note that this event is very close to the original event from the
        master (it has binlog version of the master, event types of the
        master), so this is suitable to parse the next relay log's event. It
        has been produced by
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        Format_description_log_event::Format_description_log_event(char* buf,).
2400 2401 2402 2403 2404 2405 2406 2407 2408
        Why don't we want to write the description_event_for_queue if this
        event is for format<4 (3.23 or 4.x): this is because in that case, the
        description_event_for_queue describes the data received from the
        master, but not the data written to the relay log (*conversion*),
        which is in format 4 (slave's).
      */
      /*
        Set 'created' to 0, so that in next relay logs this event does not
        trigger cleaning actions on the slave in
2409
        Format_description_log_event::apply_event_impl().
2410 2411 2412 2413
      */
      description_event_for_queue->created= 0;
      /* Don't set log_pos in event header */
      description_event_for_queue->artificial_event=1;
2414

2415 2416 2417
      if (description_event_for_queue->write(&log_file))
        goto err;
      bytes_written+= description_event_for_queue->data_written;
2418
    }
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2419 2420
    if (flush_io_cache(&log_file) ||
        my_sync(log_file.file, MYF(MY_WME)))
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      goto err;
2422 2423 2424

    if (write_file_name_to_index_file)
    {
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2425 2426 2427 2428
      /*
        As this is a new log file, we write the file name to the index
        file. As every time we write to the index file, we sync it.
      */
2429
      if (my_b_write(&index_file, (uchar*) log_file_name,
2430
		     strlen(log_file_name)) ||
2431
	  my_b_write(&index_file, (uchar*) "\n", 1) ||
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2432 2433
	  flush_io_cache(&index_file) ||
          my_sync(index_file.file, MYF(MY_WME)))
2434
	goto err;
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2435
    }
2436
  }
2437 2438
  log_state= LOG_OPENED;

2439
  DBUG_RETURN(0);
2440 2441

err:
2442 2443 2444
  sql_print_error("Could not use %s for logging (error %d). \
Turning logging off for the whole duration of the MySQL server process. \
To turn it on again: fix the cause, \
2445
shutdown the MySQL server and restart it.", name, errno);
2446 2447 2448
  if (file >= 0)
    my_close(file,MYF(0));
  end_io_cache(&log_file);
2449 2450
  end_io_cache(&index_file);
  safeFree(name);
2451
  log_state= LOG_CLOSED;
2452
  DBUG_RETURN(1);
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}

2455

2456
int MYSQL_BIN_LOG::get_current_log(LOG_INFO* linfo)
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2457 2458
{
  pthread_mutex_lock(&LOCK_log);
2459 2460 2461 2462 2463
  int ret = raw_get_current_log(linfo);
  pthread_mutex_unlock(&LOCK_log);
  return ret;
}

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2464
int MYSQL_BIN_LOG::raw_get_current_log(LOG_INFO* linfo)
2465
{
2466 2467
  strmake(linfo->log_file_name, log_file_name, sizeof(linfo->log_file_name)-1);
  linfo->pos = my_b_tell(&log_file);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2468 2469 2470
  return 0;
}

2471 2472
/**
  Move all data up in a file in an filename index file.
2473 2474 2475 2476 2477

    We do the copy outside of the IO_CACHE as the cache buffers would just
    make things slower and more complicated.
    In most cases the copy loop should only do one read.

2478 2479 2480 2481 2482 2483 2484
  @param index_file			File to move
  @param offset			Move everything from here to beginning

  @note
    File will be truncated to be 'offset' shorter or filled up with newlines

  @retval
2485 2486 2487
    0	ok
*/

2488 2489
#ifdef HAVE_REPLICATION

2490 2491 2492 2493 2494
static bool copy_up_file_and_fill(IO_CACHE *index_file, my_off_t offset)
{
  int bytes_read;
  my_off_t init_offset= offset;
  File file= index_file->file;
2495
  uchar io_buf[IO_SIZE*2];
2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506
  DBUG_ENTER("copy_up_file_and_fill");

  for (;; offset+= bytes_read)
  {
    (void) my_seek(file, offset, MY_SEEK_SET, MYF(0));
    if ((bytes_read= (int) my_read(file, io_buf, sizeof(io_buf), MYF(MY_WME)))
	< 0)
      goto err;
    if (!bytes_read)
      break;					// end of file
    (void) my_seek(file, offset-init_offset, MY_SEEK_SET, MYF(0));
2507
    if (my_write(file, io_buf, bytes_read, MYF(MY_WME | MY_NABP)))
2508 2509 2510
      goto err;
  }
  /* The following will either truncate the file or fill the end with \n' */
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guilhem@mysql.com committed
2511 2512
  if (my_chsize(file, offset - init_offset, '\n', MYF(MY_WME)) ||
      my_sync(file, MYF(MY_WME)))
2513 2514 2515 2516 2517 2518 2519 2520 2521 2522
    goto err;

  /* Reset data in old index cache */
  reinit_io_cache(index_file, READ_CACHE, (my_off_t) 0, 0, 1);
  DBUG_RETURN(0);

err:
  DBUG_RETURN(1);
}

2523
#endif /* HAVE_REPLICATION */
2524

2525 2526
/**
  Find the position in the log-index-file for the given log name.
2527

2528 2529 2530 2531 2532 2533
  @param linfo		Store here the found log file name and position to
                       the NEXT log file name in the index file.
  @param log_name	Filename to find in the index file.
                       Is a null pointer if we want to read the first entry
  @param need_lock	Set this to 1 if the parent doesn't already have a
                       lock on LOCK_index
2534

2535
  @note
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2536 2537
    On systems without the truncate function the file will end with one or
    more empty lines.  These will be ignored when reading the file.
2538

2539
  @retval
2540
    0			ok
2541 2542 2543
  @retval
    LOG_INFO_EOF	        End of log-index-file found
  @retval
2544 2545 2546
    LOG_INFO_IO		Got IO error while reading file
*/

2547
int MYSQL_BIN_LOG::find_log_pos(LOG_INFO *linfo, const char *log_name,
2548
			    bool need_lock)
bk@work.mysql.com's avatar
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2549
{
2550 2551 2552 2553 2554
  int error= 0;
  char *fname= linfo->log_file_name;
  uint log_name_len= log_name ? (uint) strlen(log_name) : 0;
  DBUG_ENTER("find_log_pos");
  DBUG_PRINT("enter",("log_name: %s", log_name ? log_name : "NULL"));
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bk@work.mysql.com committed
2555

2556
  /*
2557 2558
    Mutex needed because we need to make sure the file pointer does not
    move from under our feet
2559
  */
2560
  if (need_lock)
2561
    pthread_mutex_lock(&LOCK_index);
2562 2563 2564 2565 2566
  safe_mutex_assert_owner(&LOCK_index);

  /* As the file is flushed, we can't get an error here */
  (void) reinit_io_cache(&index_file, READ_CACHE, (my_off_t) 0, 0, 0);

2567
  for (;;)
2568
  {
2569
    uint length;
2570 2571 2572 2573
    my_off_t offset= my_b_tell(&index_file);
    /* If we get 0 or 1 characters, this is the end of the file */

    if ((length= my_b_gets(&index_file, fname, FN_REFLEN)) <= 1)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2574
    {
2575 2576 2577
      /* Did not find the given entry; Return not found or error */
      error= !index_file.error ? LOG_INFO_EOF : LOG_INFO_IO;
      break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2578 2579
    }

2580 2581
    // if the log entry matches, null string matching anything
    if (!log_name ||
sasha@mysql.sashanet.com's avatar
sasha@mysql.sashanet.com committed
2582
	(log_name_len == length-1 && fname[log_name_len] == '\n' &&
2583
	 !memcmp(fname, log_name, log_name_len)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2584
    {
2585
      DBUG_PRINT("info",("Found log file entry"));
2586
      fname[length-1]=0;			// remove last \n
2587 2588
      linfo->index_file_start_offset= offset;
      linfo->index_file_offset = my_b_tell(&index_file);
2589
      break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2590
    }
2591
  }
2592

2593
  if (need_lock)
2594
    pthread_mutex_unlock(&LOCK_index);
2595
  DBUG_RETURN(error);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2596
}
2597

2598

2599 2600
/**
  Find the position in the log-index-file for the given log name.
2601

2602
  @param
2603 2604
    linfo		Store here the next log file name and position to
			the file name after that.
2605
  @param
2606 2607 2608
    need_lock		Set this to 1 if the parent doesn't already have a
			lock on LOCK_index

2609
  @note
2610
    - Before calling this function, one has to call find_log_pos()
2611
    to set up 'linfo'
2612
    - Mutex needed because we need to make sure the file pointer does not move
2613
    from under our feet
2614

2615
  @retval
2616
    0			ok
2617 2618 2619
  @retval
    LOG_INFO_EOF	        End of log-index-file found
  @retval
2620 2621 2622
    LOG_INFO_IO		Got IO error while reading file
*/

2623
int MYSQL_BIN_LOG::find_next_log(LOG_INFO* linfo, bool need_lock)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2624
{
2625
  int error= 0;
2626
  uint length;
2627 2628
  char *fname= linfo->log_file_name;

2629 2630
  if (need_lock)
    pthread_mutex_lock(&LOCK_index);
2631 2632 2633 2634 2635 2636 2637 2638
  safe_mutex_assert_owner(&LOCK_index);

  /* As the file is flushed, we can't get an error here */
  (void) reinit_io_cache(&index_file, READ_CACHE, linfo->index_file_offset, 0,
			 0);

  linfo->index_file_start_offset= linfo->index_file_offset;
  if ((length=my_b_gets(&index_file, fname, FN_REFLEN)) <= 1)
2639
  {
2640
    error = !index_file.error ? LOG_INFO_EOF : LOG_INFO_IO;
2641 2642
    goto err;
  }
2643
  fname[length-1]=0;				// kill \n
2644
  linfo->index_file_offset = my_b_tell(&index_file);
2645

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2646
err:
2647 2648
  if (need_lock)
    pthread_mutex_unlock(&LOCK_index);
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bk@work.mysql.com committed
2649 2650 2651
  return error;
}

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2652

2653 2654 2655
/**
  Delete all logs refered to in the index file.
  Start writing to a new log file.
2656

2657
  The new index file will only contain this file.
2658

2659
  @param thd		Thread
2660

2661 2662
  @note
    If not called from slave thread, write start event to new log
2663

2664
  @retval
2665
    0	ok
2666
  @retval
2667 2668 2669
    1   error
*/

2670
bool MYSQL_BIN_LOG::reset_logs(THD* thd)
2671 2672
{
  LOG_INFO linfo;
2673
  bool error=0;
2674
  const char* save_name;
2675
  DBUG_ENTER("reset_logs");
2676

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tomas@poseidon.ndb.mysql.com committed
2677
  ha_reset_logs(thd);
2678 2679 2680 2681
  /*
    We need to get both locks to be sure that no one is trying to
    write to the index log file.
  */
2682
  pthread_mutex_lock(&LOCK_log);
2683
  pthread_mutex_lock(&LOCK_index);
2684

2685 2686 2687 2688 2689 2690
  /*
    The following mutex is needed to ensure that no threads call
    'delete thd' as we would then risk missing a 'rollback' from this
    thread. If the transaction involved MyISAM tables, it should go
    into binlog even on rollback.
  */
2691
  VOID(pthread_mutex_lock(&LOCK_thread_count));
2692 2693 2694 2695

  /* Save variables so that we can reopen the log */
  save_name=name;
  name=0;					// Protect against free
2696
  close(LOG_CLOSE_TO_BE_OPENED);
2697 2698 2699 2700

  /* First delete all old log files */

  if (find_log_pos(&linfo, NullS, 0))
2701 2702 2703 2704
  {
    error=1;
    goto err;
  }
2705

2706
  for (;;)
2707
  {
2708
    my_delete_allow_opened(linfo.log_file_name, MYF(MY_WME));
2709
    if (find_next_log(&linfo, 0))
2710 2711
      break;
  }
2712 2713

  /* Start logging with a new file */
2714
  close(LOG_CLOSE_INDEX);
2715
  my_delete_allow_opened(index_file_name, MYF(MY_WME));	// Reset (open will update)
2716
  if (!thd->slave_thread)
2717
    need_start_event=1;
2718
  if (!open_index_file(index_file_name, 0))
2719
    open(save_name, log_type, 0, io_cache_type, no_auto_events, max_size, 0);
2720
  my_free((uchar*) save_name, MYF(0));
2721

2722
err:
2723
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
2724
  pthread_mutex_unlock(&LOCK_index);
2725
  pthread_mutex_unlock(&LOCK_log);
2726
  DBUG_RETURN(error);
2727 2728
}

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2729

2730
/**
2731 2732
  Delete relay log files prior to rli->group_relay_log_name
  (i.e. all logs which are not involved in a non-finished group
2733 2734
  (transaction)), remove them from the index file and start on next
  relay log.
2735

2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749
  IMPLEMENTATION
  - Protects index file with LOCK_index
  - Delete relevant relay log files
  - Copy all file names after these ones to the front of the index file
  - If the OS has truncate, truncate the file, else fill it with \n'
  - Read the next file name from the index file and store in rli->linfo

  @param rli	       Relay log information
  @param included     If false, all relay logs that are strictly before
                      rli->group_relay_log_name are deleted ; if true, the
                      latter is deleted too (i.e. all relay logs
                      read by the SQL slave thread are deleted).

  @note
2750
    - This is only called from the slave-execute thread when it has read
2751
    all commands from a relay log and want to switch to a new relay log.
2752
    - When this happens, we can be in an active transaction as
2753 2754 2755
    a transaction can span over two relay logs
    (although it is always written as a single block to the master's binary
    log, hence cannot span over two master's binary logs).
2756

2757
  @retval
2758
    0			ok
2759 2760 2761
  @retval
    LOG_INFO_EOF	        End of log-index-file found
  @retval
2762
    LOG_INFO_SEEK	Could not allocate IO cache
2763
  @retval
2764
    LOG_INFO_IO		Got IO error while reading file
2765 2766
*/

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
2767
#ifdef HAVE_REPLICATION
2768

2769
int MYSQL_BIN_LOG::purge_first_log(Relay_log_info* rli, bool included)
2770
{
2771
  int error;
2772 2773
  DBUG_ENTER("purge_first_log");

2774 2775
  DBUG_ASSERT(is_open());
  DBUG_ASSERT(rli->slave_running == 1);
2776
  DBUG_ASSERT(!strcmp(rli->linfo.log_file_name,rli->event_relay_log_name));
2777

2778
  pthread_mutex_lock(&LOCK_index);
2779 2780 2781 2782 2783 2784
  pthread_mutex_lock(&rli->log_space_lock);
  rli->relay_log.purge_logs(rli->group_relay_log_name, included,
                            0, 0, &rli->log_space_total);
  // Tell the I/O thread to take the relay_log_space_limit into account
  rli->ignore_log_space_limit= 0;
  pthread_mutex_unlock(&rli->log_space_lock);
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2785 2786

  /*
2787 2788 2789
    Ok to broadcast after the critical region as there is no risk of
    the mutex being destroyed by this thread later - this helps save
    context switches
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2790
  */
2791 2792 2793 2794 2795
  pthread_cond_broadcast(&rli->log_space_cond);
  
  /*
    Read the next log file name from the index file and pass it back to
    the caller
2796 2797
    If included is true, we want the first relay log;
    otherwise we want the one after event_relay_log_name.
2798
  */
2799 2800 2801 2802
  if ((included && (error=find_log_pos(&rli->linfo, NullS, 0))) ||
      (!included &&
       ((error=find_log_pos(&rli->linfo, rli->event_relay_log_name, 0)) ||
        (error=find_next_log(&rli->linfo, 0)))))
2803 2804
  {
    char buff[22];
2805 2806 2807 2808 2809
    sql_print_error("next log error: %d  offset: %s  log: %s included: %d",
                    error,
                    llstr(rli->linfo.index_file_offset,buff),
                    rli->group_relay_log_name,
                    included);
2810 2811
    goto err;
  }
2812

2813
  /*
2814
    Reset rli's coordinates to the current log.
2815
  */
2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829
  rli->event_relay_log_pos= BIN_LOG_HEADER_SIZE;
  strmake(rli->event_relay_log_name,rli->linfo.log_file_name,
	  sizeof(rli->event_relay_log_name)-1);

  /*
    If we removed the rli->group_relay_log_name file,
    we must update the rli->group* coordinates, otherwise do not touch it as the
    group's execution is not finished (e.g. COMMIT not executed)
  */
  if (included)
  {
    rli->group_relay_log_pos = BIN_LOG_HEADER_SIZE;
    strmake(rli->group_relay_log_name,rli->linfo.log_file_name,
            sizeof(rli->group_relay_log_name)-1);
2830
    rli->notify_group_relay_log_name_update();
2831
  }
2832 2833 2834

  /* Store where we are in the new file for the execution thread */
  flush_relay_log_info(rli);
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2835

2836
err:
2837
  pthread_mutex_unlock(&LOCK_index);
2838
  DBUG_RETURN(error);
2839 2840
}

2841 2842
/**
  Update log index_file.
2843 2844
*/

2845
int MYSQL_BIN_LOG::update_log_index(LOG_INFO* log_info, bool need_update_threads)
2846 2847 2848 2849 2850
{
  if (copy_up_file_and_fill(&index_file, log_info->index_file_start_offset))
    return LOG_INFO_IO;

  // now update offsets in index file for running threads
2851 2852
  if (need_update_threads)
    adjust_linfo_offsets(log_info->index_file_start_offset);
2853 2854
  return 0;
}
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2855

2856
/**
2857 2858
  Remove all logs before the given log from disk and from the index file.

2859 2860 2861 2862 2863 2864 2865
  @param to_log	      Delete all log file name before this file.
  @param included            If true, to_log is deleted too.
  @param need_mutex
  @param need_update_threads If we want to update the log coordinates of
                             all threads. False for relay logs, true otherwise.
  @param freed_log_space     If not null, decrement this variable of
                             the amount of log space freed
2866

2867
  @note
2868 2869 2870
    If any of the logs before the deleted one is in use,
    only purge logs up to this one.

2871 2872 2873
  @retval
    0			ok
  @retval
2874 2875 2876
    LOG_INFO_EOF		to_log not found
*/

2877
int MYSQL_BIN_LOG::purge_logs(const char *to_log, 
2878 2879 2880 2881
                          bool included,
                          bool need_mutex, 
                          bool need_update_threads, 
                          ulonglong *decrease_log_space)
2882 2883
{
  int error;
2884
  int ret = 0;
2885
  bool exit_loop= 0;
2886 2887
  LOG_INFO log_info;
  DBUG_ENTER("purge_logs");
2888
  DBUG_PRINT("info",("to_log= %s",to_log));
2889

2890 2891
  if (need_mutex)
    pthread_mutex_lock(&LOCK_index);
2892
  if ((error=find_log_pos(&log_info, to_log, 0 /*no mutex*/)))
2893 2894
    goto err;

2895
  /*
2896
    File name exists in index file; delete until we find this file
2897 2898 2899
    or a file that is used.
  */
  if ((error=find_log_pos(&log_info, NullS, 0 /*no mutex*/)))
2900
    goto err;
2901 2902
  while ((strcmp(to_log,log_info.log_file_name) || (exit_loop=included)) &&
         !log_in_use(log_info.log_file_name))
2903
  {
2904
    ulong file_size= 0;
2905 2906 2907
    if (decrease_log_space) //stat the file we want to delete
    {
      MY_STAT s;
2908 2909 2910 2911 2912 2913

      /* 
         If we could not stat, we can't know the amount
         of space that deletion will free. In most cases,
         deletion won't work either, so it's not a problem.
      */
2914
      if (my_stat(log_info.log_file_name,&s,MYF(0)))
2915
        file_size= s.st_size;
2916
      else
2917 2918
	sql_print_information("Failed to execute my_stat on file '%s'",
			      log_info.log_file_name);
2919 2920 2921 2922 2923 2924 2925
    }
    /*
      It's not fatal if we can't delete a log file ;
      if we could delete it, take its size into account
    */
    DBUG_PRINT("info",("purging %s",log_info.log_file_name));
    if (!my_delete(log_info.log_file_name, MYF(0)) && decrease_log_space)
2926
      *decrease_log_space-= file_size;
tomas@poseidon.ndb.mysql.com's avatar
tomas@poseidon.ndb.mysql.com committed
2927 2928

    ha_binlog_index_purge_file(current_thd, log_info.log_file_name);
2929 2930
    if (current_thd->is_slave_error) {
      DBUG_PRINT("info",("slave error: %d", current_thd->is_slave_error));
2931 2932 2933 2934 2935 2936
      if (my_errno == EMFILE) {
        DBUG_PRINT("info",("my_errno: %d, set ret = LOG_INFO_EMFILE", my_errno));
        ret = LOG_INFO_EMFILE;
        break;
      }
    }
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tomas@poseidon.ndb.mysql.com committed
2937

2938
    if (find_next_log(&log_info, 0) || exit_loop)
2939
      break;
2940
  }
2941

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2942 2943 2944 2945
  /*
    If we get killed -9 here, the sysadmin would have to edit
    the log index file after restart - otherwise, this should be safe
  */
2946
  error= update_log_index(&log_info, need_update_threads);
2947 2948 2949
  if (error == 0) {
    error = ret;
  }
2950

2951
err:
2952 2953
  if (need_mutex)
    pthread_mutex_unlock(&LOCK_index);
2954
  DBUG_RETURN(error);
2955 2956
}

2957
/**
2958 2959 2960
  Remove all logs before the given file date from disk and from the
  index file.

2961 2962
  @param thd		Thread pointer
  @param before_date	Delete all log files before given date.
2963

2964
  @note
2965 2966 2967
    If any of the logs before the deleted one is in use,
    only purge logs up to this one.

2968
  @retval
2969
    0				ok
2970
  @retval
2971 2972 2973
    LOG_INFO_PURGE_NO_ROTATE	Binary file that can't be rotated
*/

2974
int MYSQL_BIN_LOG::purge_logs_before_date(time_t purge_time)
2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989
{
  int error;
  LOG_INFO log_info;
  MY_STAT stat_area;

  DBUG_ENTER("purge_logs_before_date");

  pthread_mutex_lock(&LOCK_index);

  /*
    Delete until we find curren file
    or a file that is used or a file
    that is older than purge_time.
  */
  if ((error=find_log_pos(&log_info, NullS, 0 /*no mutex*/)))
2990
    goto err;
2991 2992 2993 2994 2995

  while (strcmp(log_file_name, log_info.log_file_name) &&
	 !log_in_use(log_info.log_file_name))
  {
    /* It's not fatal even if we can't delete a log file */
2996 2997
    if (!my_stat(log_info.log_file_name, &stat_area, MYF(0)) ||
	stat_area.st_mtime >= purge_time)
2998
      break;
2999
    my_delete(log_info.log_file_name, MYF(0));
tomas@poseidon.ndb.mysql.com's avatar
tomas@poseidon.ndb.mysql.com committed
3000 3001 3002

    ha_binlog_index_purge_file(current_thd, log_info.log_file_name);

3003 3004
    if (find_next_log(&log_info, 0))
      break;
3005
  }
3006

3007 3008 3009 3010
  /*
    If we get killed -9 here, the sysadmin would have to edit
    the log index file after restart - otherwise, this should be safe
  */
3011
  error= update_log_index(&log_info, 1);
3012

3013 3014
err:
  pthread_mutex_unlock(&LOCK_index);
3015
  DBUG_RETURN(error);
3016
}
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SCRUM  
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3017
#endif /* HAVE_REPLICATION */
3018

3019

3020 3021
/**
  Create a new log file name.
3022

3023
  @param buf		buf of at least FN_REFLEN where new name is stored
3024

3025
  @note
3026 3027 3028
    If file name will be longer then FN_REFLEN it will be truncated
*/

3029
void MYSQL_BIN_LOG::make_log_name(char* buf, const char* log_ident)
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3030
{
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3031
  uint dir_len = dirname_length(log_file_name); 
3032
  if (dir_len >= FN_REFLEN)
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3033 3034
    dir_len=FN_REFLEN-1;
  strnmov(buf, log_file_name, dir_len);
3035
  strmake(buf+dir_len, log_ident, FN_REFLEN - dir_len -1);
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3036 3037
}

3038

3039 3040
/**
  Check if we are writing/reading to the given log file.
3041 3042
*/

3043
bool MYSQL_BIN_LOG::is_active(const char *log_file_name_arg)
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3044
{
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3045
  return !strcmp(log_file_name, log_file_name_arg);
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3046 3047
}

3048

3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068
/*
  Wrappers around new_file_impl to avoid using argument
  to control locking. The argument 1) less readable 2) breaks
  incapsulation 3) allows external access to the class without
  a lock (which is not possible with private new_file_without_locking
  method).
*/

void MYSQL_BIN_LOG::new_file()
{
  new_file_impl(1);
}


void MYSQL_BIN_LOG::new_file_without_locking()
{
  new_file_impl(0);
}


3069 3070
/**
  Start writing to a new log file or reopen the old file.
3071

3072
  @param need_lock		Set to 1 if caller has not locked LOCK_log
3073

3074
  @note
3075 3076 3077
    The new file name is stored last in the index file
*/

3078
void MYSQL_BIN_LOG::new_file_impl(bool need_lock)
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3079
{
3080 3081
  char new_name[FN_REFLEN], *new_name_ptr, *old_name;

3082
  DBUG_ENTER("MYSQL_BIN_LOG::new_file_impl");
3083
  if (!is_open())
3084 3085 3086 3087
  {
    DBUG_PRINT("info",("log is closed"));
    DBUG_VOID_RETURN;
  }
3088 3089 3090

  if (need_lock)
    pthread_mutex_lock(&LOCK_log);
3091 3092
  pthread_mutex_lock(&LOCK_index);

3093 3094 3095
  safe_mutex_assert_owner(&LOCK_log);
  safe_mutex_assert_owner(&LOCK_index);

3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108
  /*
    if binlog is used as tc log, be sure all xids are "unlogged",
    so that on recover we only need to scan one - latest - binlog file
    for prepared xids. As this is expected to be a rare event,
    simple wait strategy is enough. We're locking LOCK_log to be sure no
    new Xid_log_event's are added to the log (and prepared_xids is not
    increased), and waiting on COND_prep_xids for late threads to
    catch up.
  */
  if (prepared_xids)
  {
    tc_log_page_waits++;
    pthread_mutex_lock(&LOCK_prep_xids);
3109 3110
    while (prepared_xids) {
      DBUG_PRINT("info", ("prepared_xids=%lu", prepared_xids));
3111
      pthread_cond_wait(&COND_prep_xids, &LOCK_prep_xids);
3112
    }
3113 3114 3115
    pthread_mutex_unlock(&LOCK_prep_xids);
  }

3116
  /* Reuse old name if not binlog and not update log */
3117
  new_name_ptr= name;
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3118

3119
  /*
3120 3121 3122
    If user hasn't specified an extension, generate a new log name
    We have to do this here and not in open as we want to store the
    new file name in the current binary log file.
3123
  */
3124 3125 3126
  if (generate_new_name(new_name, name))
    goto end;
  new_name_ptr=new_name;
3127

3128
  if (log_type == LOG_BIN)
3129
  {
3130
    if (!no_auto_events)
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3131
    {
3132
      /*
3133 3134
        We log the whole file name for log file as the user may decide
        to change base names at some point.
3135
      */
3136
      Rotate_log_event r(new_name+dirname_length(new_name),
3137
                         0, LOG_EVENT_OFFSET, 0);
3138
      r.write(&log_file);
3139
      bytes_written += r.data_written;
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3140
    }
3141 3142 3143 3144 3145
    /*
      Update needs to be signalled even if there is no rotate event
      log rotation should give the waiting thread a signal to
      discover EOF and move on to the next log.
    */
3146
    signal_update();
3147 3148 3149
  }
  old_name=name;
  name=0;				// Don't free name
3150
  close(LOG_CLOSE_TO_BE_OPENED);
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guilhem@mysql.com committed
3151

3152
  /*
3153
     Note that at this point, log_state != LOG_CLOSED (important for is_open()).
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guilhem@mysql.com committed
3154
  */
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guilhem@mysql.com committed
3155

3156
  /*
3157
     new_file() is only used for rotation (in FLUSH LOGS or because size >
3158
     max_binlog_size or max_relay_log_size).
3159 3160 3161 3162
     If this is a binary log, the Format_description_log_event at the beginning of
     the new file should have created=0 (to distinguish with the
     Format_description_log_event written at server startup, which should
     trigger temp tables deletion on slaves.
3163
  */
3164

3165
  open(old_name, log_type, new_name_ptr,
3166
       io_cache_type, no_auto_events, max_size, 1);
3167 3168
  my_free(old_name,MYF(0));

3169
end:
3170 3171
  if (need_lock)
    pthread_mutex_unlock(&LOCK_log);
3172 3173
  pthread_mutex_unlock(&LOCK_index);

3174
  DBUG_VOID_RETURN;
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3175 3176
}

3177

3178
bool MYSQL_BIN_LOG::append(Log_event* ev)
3179 3180 3181
{
  bool error = 0;
  pthread_mutex_lock(&LOCK_log);
3182
  DBUG_ENTER("MYSQL_BIN_LOG::append");
3183

3184
  DBUG_ASSERT(log_file.type == SEQ_READ_APPEND);
3185 3186 3187 3188
  /*
    Log_event::write() is smart enough to use my_b_write() or
    my_b_append() depending on the kind of cache we have.
  */
3189 3190 3191 3192 3193
  if (ev->write(&log_file))
  {
    error=1;
    goto err;
  }
3194
  bytes_written+= ev->data_written;
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3195
  DBUG_PRINT("info",("max_size: %lu",max_size));
3196
  if ((uint) my_b_append_tell(&log_file) > max_size)
3197
    new_file_without_locking();
3198

3199
err:
3200
  pthread_mutex_unlock(&LOCK_log);
3201
  signal_update();				// Safe as we don't call close
3202
  DBUG_RETURN(error);
3203 3204
}

3205

3206
bool MYSQL_BIN_LOG::appendv(const char* buf, uint len,...)
3207
{
3208
  bool error= 0;
3209
  DBUG_ENTER("MYSQL_BIN_LOG::appendv");
3210 3211
  va_list(args);
  va_start(args,len);
3212

3213
  DBUG_ASSERT(log_file.type == SEQ_READ_APPEND);
3214

3215
  safe_mutex_assert_owner(&LOCK_log);
3216 3217
  do
  {
3218
    if (my_b_append(&log_file,(uchar*) buf,len))
3219
    {
3220 3221
      error= 1;
      goto err;
3222
    }
3223
    bytes_written += len;
3224
  } while ((buf=va_arg(args,const char*)) && (len=va_arg(args,uint)));
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3225
  DBUG_PRINT("info",("max_size: %lu",max_size));
3226
  if ((uint) my_b_append_tell(&log_file) > max_size)
3227
    new_file_without_locking();
3228 3229

err:
3230 3231
  if (!error)
    signal_update();
3232
  DBUG_RETURN(error);
3233
}
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3234

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3235

3236
bool MYSQL_BIN_LOG::flush_and_sync()
3237
{
3238 3239 3240 3241 3242
  int err=0, fd=log_file.file;
  safe_mutex_assert_owner(&LOCK_log);
  if (flush_io_cache(&log_file))
    return 1;
  if (++sync_binlog_counter >= sync_binlog_period && sync_binlog_period)
3243 3244
  {
    sync_binlog_counter= 0;
3245
    err=my_sync(fd, MYF(MY_WME));
3246
  }
3247
  return err;
3248 3249
}

3250
void MYSQL_BIN_LOG::start_union_events(THD *thd, query_id_t query_id_param)
3251 3252 3253 3254 3255
{
  DBUG_ASSERT(!thd->binlog_evt_union.do_union);
  thd->binlog_evt_union.do_union= TRUE;
  thd->binlog_evt_union.unioned_events= FALSE;
  thd->binlog_evt_union.unioned_events_trans= FALSE;
3256
  thd->binlog_evt_union.first_query_id= query_id_param;
3257 3258
}

3259
void MYSQL_BIN_LOG::stop_union_events(THD *thd)
3260 3261 3262 3263 3264
{
  DBUG_ASSERT(thd->binlog_evt_union.do_union);
  thd->binlog_evt_union.do_union= FALSE;
}

3265
bool MYSQL_BIN_LOG::is_query_in_union(THD *thd, query_id_t query_id_param)
3266 3267 3268 3269 3270
{
  return (thd->binlog_evt_union.do_union && 
          query_id_param >= thd->binlog_evt_union.first_query_id);
}

3271 3272 3273 3274 3275 3276 3277 3278 3279 3280

/*
  These functions are placed in this file since they need access to
  binlog_hton, which has internal linkage.
*/

int THD::binlog_setup_trx_data()
{
  DBUG_ENTER("THD::binlog_setup_trx_data");
  binlog_trx_data *trx_data=
3281
    (binlog_trx_data*) thd_get_ha_data(this, binlog_hton);
3282 3283 3284 3285

  if (trx_data)
    DBUG_RETURN(0);                             // Already set up

3286
  trx_data= (binlog_trx_data*) my_malloc(sizeof(binlog_trx_data), MYF(MY_ZEROFILL));
3287 3288 3289 3290
  if (!trx_data ||
      open_cached_file(&trx_data->trans_log, mysql_tmpdir,
                       LOG_PREFIX, binlog_cache_size, MYF(MY_WME)))
  {
3291
    my_free((uchar*)trx_data, MYF(MY_ALLOW_ZERO_PTR));
3292 3293
    DBUG_RETURN(1);                      // Didn't manage to set it up
  }
3294
  thd_set_ha_data(this, binlog_hton, trx_data);
3295

3296
  trx_data= new (thd_get_ha_data(this, binlog_hton)) binlog_trx_data;
3297

3298 3299 3300
  DBUG_RETURN(0);
}

3301
/*
3302 3303
  Function to start a statement and optionally a transaction for the
  binary log.
3304

3305 3306
  SYNOPSIS
    binlog_start_trans_and_stmt()
3307

3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331
  DESCRIPTION

    This function does three things:
    - Start a transaction if not in autocommit mode or if a BEGIN
      statement has been seen.

    - Start a statement transaction to allow us to truncate the binary
      log.

    - Save the currrent binlog position so that we can roll back the
      statement by truncating the transaction log.

      We only update the saved position if the old one was undefined,
      the reason is that there are some cases (e.g., for CREATE-SELECT)
      where the position is saved twice (e.g., both in
      select_create::prepare() and THD::binlog_write_table_map()) , but
      we should use the first. This means that calls to this function
      can be used to start the statement before the first table map
      event, to include some extra events.
 */

void
THD::binlog_start_trans_and_stmt()
{
3332
  binlog_trx_data *trx_data= (binlog_trx_data*) thd_get_ha_data(this, binlog_hton);
3333 3334 3335 3336 3337 3338
  DBUG_ENTER("binlog_start_trans_and_stmt");
  DBUG_PRINT("enter", ("trx_data: 0x%lx  trx_data->before_stmt_pos: %lu",
                       (long) trx_data,
                       (trx_data ? (ulong) trx_data->before_stmt_pos :
                        (ulong) 0)));

3339
  if (trx_data == NULL ||
3340
      trx_data->before_stmt_pos == MY_OFF_T_UNDEF)
3341
  {
3342
    this->binlog_set_stmt_begin();
3343
    if (options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))
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3344 3345
      trans_register_ha(this, TRUE, binlog_hton);
    trans_register_ha(this, FALSE, binlog_hton);
3346 3347 3348 3349
  }
  DBUG_VOID_RETURN;
}

3350 3351
void THD::binlog_set_stmt_begin() {
  binlog_trx_data *trx_data=
3352
    (binlog_trx_data*) thd_get_ha_data(this, binlog_hton);
3353 3354 3355 3356 3357 3358 3359 3360 3361

  /*
    The call to binlog_trans_log_savepos() might create the trx_data
    structure, if it didn't exist before, so we save the position
    into an auto variable and then write it into the transaction
    data for the binary log (i.e., trx_data).
  */
  my_off_t pos= 0;
  binlog_trans_log_savepos(this, &pos);
3362
  trx_data= (binlog_trx_data*) thd_get_ha_data(this, binlog_hton);
3363 3364 3365 3366 3367 3368
  trx_data->before_stmt_pos= pos;
}

int THD::binlog_flush_transaction_cache()
{
  DBUG_ENTER("binlog_flush_transaction_cache");
3369 3370
  binlog_trx_data *trx_data= (binlog_trx_data*)
    thd_get_ha_data(this, binlog_hton);
3371
  DBUG_PRINT("enter", ("trx_data=0x%lu", (ulong) trx_data));
3372
  if (trx_data)
3373 3374
    DBUG_PRINT("enter", ("trx_data->before_stmt_pos=%lu",
                         (ulong) trx_data->before_stmt_pos));
3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395

  /*
    Write the transaction cache to the binary log.  We don't flush and
    sync the log file since we don't know if more will be written to
    it. If the caller want the log file sync:ed, the caller has to do
    it.

    The transaction data is only reset upon a successful write of the
    cache to the binary log.
  */

  if (trx_data && likely(mysql_bin_log.is_open())) {
    if (int error= mysql_bin_log.write_cache(&trx_data->trans_log, true, true))
      DBUG_RETURN(error);
    trx_data->reset();
  }

  DBUG_RETURN(0);
}


3396 3397
/*
  Write a table map to the binary log.
3398 3399
 */

3400 3401
int THD::binlog_write_table_map(TABLE *table, bool is_trans)
{
3402
  int error;
3403
  DBUG_ENTER("THD::binlog_write_table_map");
3404 3405
  DBUG_PRINT("enter", ("table: 0x%lx  (%s: #%lu)",
                       (long) table, table->s->table_name.str,
3406
                       table->s->table_map_id));
3407 3408

  /* Pre-conditions */
3409
  DBUG_ASSERT(current_stmt_binlog_row_based && mysql_bin_log.is_open());
3410 3411 3412 3413 3414 3415 3416 3417
  DBUG_ASSERT(table->s->table_map_id != ULONG_MAX);

  Table_map_log_event::flag_set const
    flags= Table_map_log_event::TM_NO_FLAGS;

  Table_map_log_event
    the_event(this, table, table->s->table_map_id, is_trans, flags);

3418 3419
  if (is_trans && binlog_table_maps == 0)
    binlog_start_trans_and_stmt();
3420

3421
  if ((error= mysql_bin_log.write(&the_event)))
3422 3423
    DBUG_RETURN(error);

3424
  binlog_table_maps++;
3425 3426 3427 3428
  table->s->table_map_version= mysql_bin_log.table_map_version();
  DBUG_RETURN(0);
}

3429 3430 3431 3432
Rows_log_event*
THD::binlog_get_pending_rows_event() const
{
  binlog_trx_data *const trx_data=
3433
    (binlog_trx_data*) thd_get_ha_data(this, binlog_hton);
3434 3435 3436 3437 3438 3439
  /*
    This is less than ideal, but here's the story: If there is no
    trx_data, prepare_pending_rows_event() has never been called
    (since the trx_data is set up there). In that case, we just return
    NULL.
   */
3440
  return trx_data ? trx_data->pending() : NULL;
3441 3442 3443 3444 3445
}

void
THD::binlog_set_pending_rows_event(Rows_log_event* ev)
{
3446
  if (thd_get_ha_data(this, binlog_hton) == NULL)
3447 3448
    binlog_setup_trx_data();

3449
  binlog_trx_data *const trx_data=
3450
    (binlog_trx_data*) thd_get_ha_data(this, binlog_hton);
3451

3452
  DBUG_ASSERT(trx_data);
3453
  trx_data->set_pending(ev);
3454 3455 3456 3457 3458 3459 3460 3461
}


/*
  Moves the last bunch of rows from the pending Rows event to the binlog
  (either cached binlog if transaction, or disk binlog). Sets a new pending
  event.
*/
3462 3463 3464
int
MYSQL_BIN_LOG::flush_and_set_pending_rows_event(THD *thd,
                                                Rows_log_event* event)
3465
{
3466
  DBUG_ENTER("MYSQL_BIN_LOG::flush_and_set_pending_rows_event(event)");
3467
  DBUG_ASSERT(mysql_bin_log.is_open());
3468
  DBUG_PRINT("enter", ("event: 0x%lx", (long) event));
3469 3470 3471 3472

  int error= 0;

  binlog_trx_data *const trx_data=
3473
    (binlog_trx_data*) thd_get_ha_data(thd, binlog_hton);
3474 3475 3476

  DBUG_ASSERT(trx_data);

3477
  DBUG_PRINT("info", ("trx_data->pending(): 0x%lx", (long) trx_data->pending()));
3478

3479
  if (Rows_log_event* pending= trx_data->pending())
3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539
  {
    IO_CACHE *file= &log_file;

    /*
      Decide if we should write to the log file directly or to the
      transaction log.
    */
    if (pending->get_cache_stmt() || my_b_tell(&trx_data->trans_log))
      file= &trx_data->trans_log;

    /*
      If we are writing to the log file directly, we could avoid
      locking the log. This does not work since we need to step the
      m_table_map_version below, and that change has to be protected
      by the LOCK_log mutex.
    */
    pthread_mutex_lock(&LOCK_log);

    /*
      Write pending event to log file or transaction cache
    */
    if (pending->write(file))
    {
      pthread_mutex_unlock(&LOCK_log);
      DBUG_RETURN(1);
    }

    /*
      We step the table map version if we are writing an event
      representing the end of a statement.  We do this regardless of
      wheather we write to the transaction cache or to directly to the
      file.

      In an ideal world, we could avoid stepping the table map version
      if we were writing to a transaction cache, since we could then
      reuse the table map that was written earlier in the transaction
      cache.  This does not work since STMT_END_F implies closing all
      table mappings on the slave side.

      TODO: Find a solution so that table maps does not have to be
      written several times within a transaction.
     */
    if (pending->get_flags(Rows_log_event::STMT_END_F))
      ++m_table_map_version;

    delete pending;

    if (file == &log_file)
    {
      error= flush_and_sync();
      if (!error)
      {
        signal_update();
        rotate_and_purge(RP_LOCK_LOG_IS_ALREADY_LOCKED);
      }
    }

    pthread_mutex_unlock(&LOCK_log);
  }

3540
  thd->binlog_set_pending_rows_event(event);
3541 3542 3543 3544

  DBUG_RETURN(error);
}

3545 3546
/**
  Write an event to the binary log.
3547 3548
*/

3549
bool MYSQL_BIN_LOG::write(Log_event *event_info)
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bk@work.mysql.com committed
3550
{
3551 3552
  THD *thd= event_info->thd;
  bool error= 1;
3553
  DBUG_ENTER("MYSQL_BIN_LOG::write(Log_event *)");
3554

3555 3556
  if (thd->binlog_evt_union.do_union)
  {
3557 3558 3559 3560
    /*
      In Stored function; Remember that function call caused an update.
      We will log the function call to the binary log on function exit
    */
3561 3562 3563 3564
    thd->binlog_evt_union.unioned_events= TRUE;
    thd->binlog_evt_union.unioned_events_trans |= event_info->cache_stmt;
    DBUG_RETURN(0);
  }
3565 3566 3567 3568 3569 3570 3571

  /*
    Flush the pending rows event to the transaction cache or to the
    log file.  Since this function potentially aquire the LOCK_log
    mutex, we do this before aquiring the LOCK_log mutex in this
    function.

3572 3573 3574
    We only end the statement if we are in a top-level statement.  If
    we are inside a stored function, we do not end the statement since
    this will close all tables on the slave.
3575
  */
3576 3577 3578
  bool const end_stmt=
    thd->prelocked_mode && thd->lex->requires_prelocking();
  thd->binlog_flush_pending_rows_event(end_stmt);
3579

3580 3581
  pthread_mutex_lock(&LOCK_log);

3582
  /*
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3583 3584 3585 3586
     In most cases this is only called if 'is_open()' is true; in fact this is
     mostly called if is_open() *was* true a few instructions before, but it
     could have changed since.
  */
3587
  if (likely(is_open()))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3588
  {
3589
    IO_CACHE *file= &log_file;
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
3590
#ifdef HAVE_REPLICATION
3591
    /*
3592 3593 3594
      In the future we need to add to the following if tests like
      "do the involved tables match (to be implemented)
      binlog_[wild_]{do|ignore}_table?" (WL#1049)"
3595
    */
3596
    const char *local_db= event_info->get_db();
3597
    if ((thd && !(thd->options & OPTION_BIN_LOG)) ||
lars@mysql.com's avatar
Merge  
lars@mysql.com committed
3598
	(!binlog_filter->db_ok(local_db)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3599
    {
3600
      VOID(pthread_mutex_unlock(&LOCK_log));
3601
      DBUG_RETURN(0);
3602
    }
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
3603
#endif /* HAVE_REPLICATION */
3604

3605
#if defined(USING_TRANSACTIONS) 
3606 3607 3608 3609 3610 3611 3612
    /*
      Should we write to the binlog cache or to the binlog on disk?
      Write to the binlog cache if:
      - it is already not empty (meaning we're in a transaction; note that the
     present event could be about a non-transactional table, but still we need
     to write to the binlog cache in that case to handle updates to mixed
     trans/non-trans table types the best possible in binlogging)
3613
      - or if the event asks for it (cache_stmt == TRUE).
3614 3615 3616
    */
    if (opt_using_transactions && thd)
    {
3617 3618
      if (thd->binlog_setup_trx_data())
        goto err;
3619

3620
      binlog_trx_data *const trx_data=
3621
        (binlog_trx_data*) thd_get_ha_data(thd, binlog_hton);
3622
      IO_CACHE *trans_log= &trx_data->trans_log;
3623 3624
      my_off_t trans_log_pos= my_b_tell(trans_log);
      if (event_info->get_cache_stmt() || trans_log_pos != 0)
3625
      {
3626
        DBUG_PRINT("info", ("Using trans_log: cache: %d, trans_log_pos: %lu",
3627
                            event_info->get_cache_stmt(),
3628
                            (ulong) trans_log_pos));
3629 3630
        if (trans_log_pos == 0)
          thd->binlog_start_trans_and_stmt();
3631
        file= trans_log;
3632
      }
3633
      /*
3634
        TODO as Mats suggested, for all the cases above where we write to
3635 3636
        trans_log, it sounds unnecessary to lock LOCK_log. We should rather
        test first if we want to write to trans_log, and if not, lock
3637
        LOCK_log.
3638
      */
3639
    }
3640
#endif /* USING_TRANSACTIONS */
3641
    DBUG_PRINT("info",("event type: %d",event_info->get_type_code()));
3642

3643 3644 3645 3646
    /*
      No check for auto events flag here - this write method should
      never be called if auto-events are enabled
    */
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3647 3648

    /*
3649 3650
      1. Write first log events which describe the 'run environment'
      of the SQL command
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3651 3652
    */

3653 3654 3655 3656
    /*
      If row-based binlogging, Insert_id, Rand and other kind of "setting
      context" events are not needed.
    */
3657
    if (thd)
3658
    {
3659
      if (!thd->current_stmt_binlog_row_based)
3660
      {
3661
        if (thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt)
3662 3663
        {
          Intvar_log_event e(thd,(uchar) LAST_INSERT_ID_EVENT,
3664
                             thd->first_successful_insert_id_in_prev_stmt_for_binlog);
3665 3666 3667
          if (e.write(file))
            goto err;
        }
3668
        if (thd->auto_inc_intervals_in_cur_stmt_for_binlog.nb_elements() > 0)
3669
        {
3670 3671 3672
          DBUG_PRINT("info",("number of auto_inc intervals: %u",
                             thd->auto_inc_intervals_in_cur_stmt_for_binlog.
                             nb_elements()));
3673 3674
          /*
            If the auto_increment was second in a table's index (possible with
3675
            MyISAM or BDB) (table->next_number_keypart != 0), such event is
3676 3677
            in fact not necessary. We could avoid logging it.
          */
3678 3679 3680
          Intvar_log_event e(thd, (uchar) INSERT_ID_EVENT,
                             thd->auto_inc_intervals_in_cur_stmt_for_binlog.
                             minimum());
3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694
          if (e.write(file))
            goto err;
        }
        if (thd->rand_used)
        {
          Rand_log_event e(thd,thd->rand_saved_seed1,thd->rand_saved_seed2);
          if (e.write(file))
            goto err;
        }
        if (thd->user_var_events.elements)
        {
          for (uint i= 0; i < thd->user_var_events.elements; i++)
          {
            BINLOG_USER_VAR_EVENT *user_var_event;
3695
            get_dynamic(&thd->user_var_events,(uchar*) &user_var_event, i);
3696 3697 3698 3699 3700 3701 3702 3703 3704 3705
            User_var_log_event e(thd, user_var_event->user_var_event->name.str,
                                 user_var_event->user_var_event->name.length,
                                 user_var_event->value,
                                 user_var_event->length,
                                 user_var_event->type,
                                 user_var_event->charset_number);
            if (e.write(file))
              goto err;
          }
        }
3706
      }
3707
    }
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3708

3709 3710
    /*
       Write the SQL command
3711
     */
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3712

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3713
    if (event_info->write(file))
3714
      goto err;
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3715

3716
    if (file == &log_file) // we are writing to the real log (disk)
3717
    {
3718
      if (flush_and_sync())
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3719
	goto err;
3720 3721
      signal_update();
      rotate_and_purge(RP_LOCK_LOG_IS_ALREADY_LOCKED);
3722
    }
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3723
    error=0;
3724

3725 3726 3727 3728
err:
    if (error)
    {
      if (my_errno == EFBIG)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3729
	my_message(ER_TRANS_CACHE_FULL, ER(ER_TRANS_CACHE_FULL), MYF(0));
3730 3731 3732 3733 3734
      else
	my_error(ER_ERROR_ON_WRITE, MYF(0), name, errno);
      write_error=1;
    }
  }
3735

3736 3737 3738
  if (event_info->flags & LOG_EVENT_UPDATE_TABLE_MAP_VERSION_F)
    ++m_table_map_version;

3739
  pthread_mutex_unlock(&LOCK_log);
3740
  DBUG_RETURN(error);
3741 3742
}

3743 3744 3745 3746 3747 3748 3749 3750 3751

int error_log_print(enum loglevel level, const char *format,
                    va_list args)
{
  return logger.error_log_print(level, format, args);
}


bool slow_log_print(THD *thd, const char *query, uint query_length,
3752
                    ulonglong current_utime)
3753
{
3754
  return logger.slow_log_print(thd, query, query_length, current_utime);
3755 3756 3757
}


3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785
bool LOGGER::log_command(THD *thd, enum enum_server_command command)
{
#ifndef NO_EMBEDDED_ACCESS_CHECKS
  Security_context *sctx= thd->security_ctx;
#endif
  /*
    Log command if we have at least one log event handler enabled and want
    to log this king of commands
  */
  if (*general_log_handler_list && (what_to_log & (1L << (uint) command)))
  {
    if ((thd->options & OPTION_LOG_OFF)
#ifndef NO_EMBEDDED_ACCESS_CHECKS
         && (sctx->master_access & SUPER_ACL)
#endif
       )
    {
      /* No logging */
      return FALSE;
    }

    return TRUE;
  }

  return FALSE;
}


3786 3787 3788 3789 3790 3791
bool general_log_print(THD *thd, enum enum_server_command command,
                       const char *format, ...)
{
  va_list args;
  uint error= 0;

3792 3793 3794 3795
  /* Print the message to the buffer if we want to log this king of commands */
  if (! logger.log_command(thd, command))
    return FALSE;

3796 3797 3798 3799 3800 3801 3802
  va_start(args, format);
  error= logger.general_log_print(thd, command, format, args);
  va_end(args);

  return error;
}

3803 3804 3805 3806 3807 3808 3809 3810 3811 3812
bool general_log_write(THD *thd, enum enum_server_command command,
                       const char *query, uint query_length)
{
  /* Write the message to the log if we want to log this king of commands */
  if (logger.log_command(thd, command))
    return logger.general_log_write(thd, command, query, query_length);

  return FALSE;
}

3813
void MYSQL_BIN_LOG::rotate_and_purge(uint flags)
3814
{
3815 3816
  if (!(flags & RP_LOCK_LOG_IS_ALREADY_LOCKED))
    pthread_mutex_lock(&LOCK_log);
3817 3818
  if ((flags & RP_FORCE_ROTATE) ||
      (my_b_tell(&log_file) >= (my_off_t) max_size))
3819
  {
3820
    new_file_without_locking();
3821 3822 3823
#ifdef HAVE_REPLICATION
    if (expire_logs_days)
    {
3824
      time_t purge_time= my_time(0) - expire_logs_days*24*60*60;
3825 3826 3827 3828 3829
      if (purge_time >= 0)
        purge_logs_before_date(purge_time);
    }
#endif
  }
3830 3831
  if (!(flags & RP_LOCK_LOG_IS_ALREADY_LOCKED))
    pthread_mutex_unlock(&LOCK_log);
3832
}
3833

3834
uint MYSQL_BIN_LOG::next_file_id()
3835 3836 3837 3838 3839 3840 3841 3842
{
  uint res;
  pthread_mutex_lock(&LOCK_log);
  res = file_id++;
  pthread_mutex_unlock(&LOCK_log);
  return res;
}

3843

3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863
/*
  Write the contents of a cache to the binary log.

  SYNOPSIS
    write_cache()
    cache    Cache to write to the binary log
    lock_log True if the LOCK_log mutex should be aquired, false otherwise
    sync_log True if the log should be flushed and sync:ed

  DESCRIPTION
    Write the contents of the cache to the binary log. The cache will
    be reset as a READ_CACHE to be able to read the contents from it.
 */

int MYSQL_BIN_LOG::write_cache(IO_CACHE *cache, bool lock_log, bool sync_log)
{
  Mutex_sentry sentry(lock_log ? &LOCK_log : NULL);

  if (reinit_io_cache(cache, READ_CACHE, 0, 0, 0))
    return ER_ERROR_ON_WRITE;
3864
  uint length= my_b_bytes_in_cache(cache), group, carry, hdr_offs;
3865 3866 3867
  long val;
  uchar header[LOG_EVENT_HEADER_LEN];

3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881
  /*
    The events in the buffer have incorrect end_log_pos data
    (relative to beginning of group rather than absolute),
    so we'll recalculate them in situ so the binlog is always
    correct, even in the middle of a group. This is possible
    because we now know the start position of the group (the
    offset of this cache in the log, if you will); all we need
    to do is to find all event-headers, and add the position of
    the group to the end_log_pos of each event.  This is pretty
    straight forward, except that we read the cache in segments,
    so an event-header might end up on the cache-border and get
    split.
  */

3882
  group= (uint)my_b_tell(&log_file);
3883 3884
  hdr_offs= carry= 0;

3885 3886
  do
  {
3887 3888 3889 3890 3891 3892

    /*
      if we only got a partial header in the last iteration,
      get the other half now and process a full header.
    */
    if (unlikely(carry > 0))
3893 3894 3895
    {
      DBUG_ASSERT(carry < LOG_EVENT_HEADER_LEN);

3896
      /* assemble both halves */
3897 3898
      memcpy(&header[carry], (char *)cache->read_pos, LOG_EVENT_HEADER_LEN - carry);

3899
      /* fix end_log_pos */
3900 3901 3902
      val= uint4korr(&header[LOG_POS_OFFSET]) + group;
      int4store(&header[LOG_POS_OFFSET], val);

3903
      /* write the first half of the split header */
3904 3905 3906
      if (my_b_write(&log_file, header, carry))
        return ER_ERROR_ON_WRITE;

3907 3908 3909 3910
      /*
        copy fixed second half of header to cache so the correct
        version will be written later.
      */
3911 3912
      memcpy((char *)cache->read_pos, &header[carry], LOG_EVENT_HEADER_LEN - carry);

3913
      /* next event header at ... */
3914
      hdr_offs = uint4korr(&header[EVENT_LEN_OFFSET]) - carry;
3915 3916 3917 3918

      carry= 0;
    }

3919 3920
    /* if there is anything to write, process it. */

3921
    if (likely(length > 0))
3922
    {
3923
      /*
3924 3925 3926 3927
        process all event-headers in this (partial) cache.
        if next header is beyond current read-buffer,
        we'll get it later (though not necessarily in the
        very next iteration, just "eventually").
3928
      */
3929

3930
      while (hdr_offs < length)
3931
      {
3932 3933 3934 3935
        /*
          partial header only? save what we can get, process once
          we get the rest.
        */
3936

3937
        if (hdr_offs + LOG_EVENT_HEADER_LEN > length)
3938
        {
3939
          carry= length - hdr_offs;
3940
          memcpy(header, (char *)cache->read_pos + hdr_offs, carry);
3941
          length= hdr_offs;
3942 3943 3944 3945
        }
        else
        {
          /* we've got a full event-header, and it came in one piece */
3946

3947
          uchar *log_pos= (uchar *)cache->read_pos + hdr_offs + LOG_POS_OFFSET;
3948

3949 3950 3951
          /* fix end_log_pos */
          val= uint4korr(log_pos) + group;
          int4store(log_pos, val);
3952

3953 3954 3955
          /* next event header at ... */
          log_pos= (uchar *)cache->read_pos + hdr_offs + EVENT_LEN_OFFSET;
          hdr_offs += uint4korr(log_pos);
3956

3957
        }
3958
      }
3959 3960

      /*
3961 3962 3963 3964 3965 3966
        Adjust hdr_offs. Note that it may still point beyond the segment
        read in the next iteration; if the current event is very long,
        it may take a couple of read-iterations (and subsequent adjustments
        of hdr_offs) for it to point into the then-current segment.
        If we have a split header (!carry), hdr_offs will be set at the
        beginning of the next iteration, overwriting the value we set here:
3967
      */
3968
      hdr_offs -= length;
3969 3970 3971
    }

    /* Write data to the binary log file */
3972
    if (my_b_write(&log_file, cache->read_pos, length))
3973
      return ER_ERROR_ON_WRITE;
3974
    cache->read_pos=cache->read_end;		// Mark buffer used up
3975
  } while ((length= my_b_fill(cache)));
3976

3977
  DBUG_ASSERT(carry == 0);
3978 3979 3980 3981 3982 3983 3984

  if (sync_log)
    flush_and_sync();

  return 0;                                     // All OK
}

3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995
/**
  Write a cached log entry to the binary log.
  - To support transaction over replication, we wrap the transaction
  with BEGIN/COMMIT or BEGIN/ROLLBACK in the binary log.
  We want to write a BEGIN/ROLLBACK block when a non-transactional table
  was updated in a transaction which was rolled back. This is to ensure
  that the same updates are run on the slave.

  @param thd
  @param cache		The cache to copy to the binlog
  @param commit_event   The commit event to print after writing the
3996
                        contents of the cache.
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3997

3998 3999 4000 4001 4002 4003
  @note
    We only come here if there is something in the cache.
  @note
    The thing in the cache is always a complete transaction.
  @note
    'cache' needs to be reinitialized after this functions returns.
4004 4005
*/

4006
bool MYSQL_BIN_LOG::write(THD *thd, IO_CACHE *cache, Log_event *commit_event)
4007
{
4008
  DBUG_ENTER("MYSQL_BIN_LOG::write(THD *, IO_CACHE *, Log_event *)");
4009
  VOID(pthread_mutex_lock(&LOCK_log));
4010

4011 4012 4013
  /* NULL would represent nothing to replicate after ROLLBACK */
  DBUG_ASSERT(commit_event != NULL);

4014
  DBUG_ASSERT(is_open());
4015
  if (likely(is_open()))                       // Should always be true
4016
  {
4017
    /*
4018 4019 4020 4021
      We only bother to write to the binary log if there is anything
      to write.
     */
    if (my_b_tell(cache) > 0)
4022
    {
4023
      /*
4024 4025
        Log "BEGIN" at the beginning of the transaction.
        which may contain more than 1 SQL statement.
4026
      */
4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049
      if (thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))
      {
        Query_log_event qinfo(thd, STRING_WITH_LEN("BEGIN"), TRUE, FALSE);
        /*
          Imagine this is rollback due to net timeout, after all statements of
          the transaction succeeded. Then we want a zero-error code in BEGIN.
          In other words, if there was a really serious error code it's already
          in the statement's events, there is no need to put it also in this
          internally generated event, and as this event is generated late it
          would lead to false alarms.
          This is safer than thd->clear_error() against kills at shutdown.
        */
        qinfo.error_code= 0;
        /*
          Now this Query_log_event has artificial log_pos 0. It must be adjusted
          to reflect the real position in the log. Not doing it would confuse the
          slave: it would prevent this one from knowing where he is in the
          master's binlog, which would result in wrong positions being shown to
          the user, MASTER_POS_WAIT undue waiting etc.
        */
        if (qinfo.write(&log_file))
          goto err;
      }
4050

4051 4052
      if ((write_error= write_cache(cache, false, false)))
        goto err;
4053

4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065
      if (commit_event && commit_event->write(&log_file))
        goto err;
      if (flush_and_sync())
        goto err;
      DBUG_EXECUTE_IF("half_binlogged_transaction", abort(););
      if (cache->error)				// Error on read
      {
        sql_print_error(ER(ER_ERROR_ON_READ), cache->file_name, errno);
        write_error=1;				// Don't give more errors
        goto err;
      }
      signal_update();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4066
    }
4067

4068 4069 4070 4071 4072 4073 4074 4075
    /*
      if commit_event is Xid_log_event, increase the number of
      prepared_xids (it's decreasd in ::unlog()). Binlog cannot be rotated
      if there're prepared xids in it - see the comment in new_file() for
      an explanation.
      If the commit_event is not Xid_log_event (then it's a Query_log_event)
      rotate binlog, if necessary.
    */
4076
    if (commit_event && commit_event->get_type_code() == XID_EVENT)
4077 4078 4079 4080 4081
    {
      pthread_mutex_lock(&LOCK_prep_xids);
      prepared_xids++;
      pthread_mutex_unlock(&LOCK_prep_xids);
    }
4082 4083
    else
      rotate_and_purge(RP_LOCK_LOG_IS_ALREADY_LOCKED);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4084
  }
4085
  VOID(pthread_mutex_unlock(&LOCK_log));
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4086

4087
  DBUG_RETURN(0);
4088 4089

err:
4090 4091 4092 4093 4094
  if (!write_error)
  {
    write_error= 1;
    sql_print_error(ER(ER_ERROR_ON_WRITE), name, errno);
  }
4095
  VOID(pthread_mutex_unlock(&LOCK_log));
4096
  DBUG_RETURN(1);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4097 4098
}

4099

4100 4101
/**
  Wait until we get a signal that the binary log has been updated.
4102

4103 4104 4105 4106
  @param thd		Thread variable
  @param is_slave      If 0, the caller is the Binlog_dump thread from master;
                       if 1, the caller is the SQL thread from the slave. This
                       influences only thd->proc_info.
4107

4108
  @note
4109
    One must have a lock on LOCK_log before calling this function.
4110
    This lock will be released before return! That's required by
guilhem@mysql.com's avatar
guilhem@mysql.com committed
4111
    THD::enter_cond() (see NOTES in sql_class.h).
4112 4113
*/

4114
void MYSQL_BIN_LOG::wait_for_update(THD* thd, bool is_slave)
4115
{
monty@mysql.com's avatar
monty@mysql.com committed
4116 4117
  const char *old_msg;
  DBUG_ENTER("wait_for_update");
4118

monty@mysql.com's avatar
monty@mysql.com committed
4119
  old_msg= thd->enter_cond(&update_cond, &LOCK_log,
4120
                           is_slave ?
monty@mysql.com's avatar
monty@mysql.com committed
4121
                           "Has read all relay log; waiting for the slave I/O "
4122
                           "thread to update it" :
monty@mysql.com's avatar
monty@mysql.com committed
4123
                           "Has sent all binlog to slave; waiting for binlog "
4124
                           "to be updated");
4125 4126
  pthread_cond_wait(&update_cond, &LOCK_log);
  thd->exit_cond(old_msg);
monty@mysql.com's avatar
monty@mysql.com committed
4127
  DBUG_VOID_RETURN;
4128
}
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4129

4130

4131 4132
/**
  Close the log file.
4133

4134 4135 4136 4137 4138
  @param exiting     Bitmask for one or more of the following bits:
          - LOG_CLOSE_INDEX : if we should close the index file
          - LOG_CLOSE_TO_BE_OPENED : if we intend to call open
                                     at once after close.
          - LOG_CLOSE_STOP_EVENT : write a 'stop' event to the log
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monty@mashka.mysql.fi committed
4139

4140
  @note
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4141 4142
    One can do an open on the object at once after doing a close.
    The internal structures are not freed until cleanup() is called
4143 4144
*/

4145
void MYSQL_BIN_LOG::close(uint exiting)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4146
{					// One can't set log_type here!
4147
  DBUG_ENTER("MYSQL_BIN_LOG::close");
4148
  DBUG_PRINT("enter",("exiting: %d", (int) exiting));
4149
  if (log_state == LOG_OPENED)
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bk@work.mysql.com committed
4150
  {
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4151
#ifdef HAVE_REPLICATION
4152 4153
    if (log_type == LOG_BIN && !no_auto_events &&
	(exiting & LOG_CLOSE_STOP_EVENT))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4154 4155
    {
      Stop_log_event s;
4156
      s.write(&log_file);
4157
      bytes_written+= s.data_written;
4158
      signal_update();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4159
    }
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4160
#endif /* HAVE_REPLICATION */
4161 4162

    /* don't pwrite in a file opened with O_APPEND - it doesn't work */
4163
    if (log_file.type == WRITE_CACHE && log_type == LOG_BIN)
4164 4165
    {
      my_off_t offset= BIN_LOG_HEADER_SIZE + FLAGS_OFFSET;
4166 4167
      my_off_t org_position= my_tell(log_file.file, MYF(0));
      uchar flags= 0;            // clearing LOG_EVENT_BINLOG_IN_USE_F
4168
      my_pwrite(log_file.file, &flags, 1, offset, MYF(0));
4169 4170 4171 4172 4173 4174 4175
      /*
        Restore position so that anything we have in the IO_cache is written
        to the correct position.
        We need the seek here, as my_pwrite() is not guaranteed to keep the
        original position on system that doesn't support pwrite().
      */
      my_seek(log_file.file, org_position, MY_SEEK_SET, MYF(0));
4176 4177
    }

4178 4179
    /* this will cleanup IO_CACHE, sync and close the file */
    MYSQL_LOG::close(exiting);
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bk@work.mysql.com committed
4180
  }
4181 4182 4183 4184 4185 4186

  /*
    The following test is needed even if is_open() is not set, as we may have
    called a not complete close earlier and the index file is still open.
  */

4187
  if ((exiting & LOG_CLOSE_INDEX) && my_b_inited(&index_file))
4188
  {
4189 4190
    end_io_cache(&index_file);
    if (my_close(index_file.file, MYF(0)) < 0 && ! write_error)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4191
    {
4192 4193
      write_error= 1;
      sql_print_error(ER(ER_ERROR_ON_WRITE), index_file_name, errno);
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bk@work.mysql.com committed
4194
    }
4195
  }
4196
  log_state= (exiting & LOG_CLOSE_TO_BE_OPENED) ? LOG_TO_BE_OPENED : LOG_CLOSED;
4197
  safeFree(name);
4198
  DBUG_VOID_RETURN;
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bk@work.mysql.com committed
4199 4200 4201
}


4202
void MYSQL_BIN_LOG::set_max_size(ulong max_size_arg)
4203 4204 4205 4206 4207 4208 4209 4210
{
  /*
    We need to take locks, otherwise this may happen:
    new_file() is called, calls open(old_max_size), then before open() starts,
    set_max_size() sets max_size to max_size_arg, then open() starts and
    uses the old_max_size argument, so max_size_arg has been overwritten and
    it's like if the SET command was never run.
  */
4211
  DBUG_ENTER("MYSQL_BIN_LOG::set_max_size");
guilhem@mysql.com's avatar
guilhem@mysql.com committed
4212
  pthread_mutex_lock(&LOCK_log);
4213 4214
  if (is_open())
    max_size= max_size_arg;
guilhem@mysql.com's avatar
guilhem@mysql.com committed
4215 4216
  pthread_mutex_unlock(&LOCK_log);
  DBUG_VOID_RETURN;
4217
}
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bk@work.mysql.com committed
4218

4219

4220 4221
/**
  Check if a string is a valid number.
4222

4223 4224 4225
  @param str			String to test
  @param res			Store value here
  @param allow_wildcards	Set to 1 if we should ignore '%' and '_'
4226

4227
  @note
4228 4229 4230
    For the moment the allow_wildcards argument is not used
    Should be move to some other file.

4231
  @retval
4232
    1	String is a number
4233
  @retval
4234
    0	Error
4235
*/
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4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247

static bool test_if_number(register const char *str,
			   long *res, bool allow_wildcards)
{
  reg2 int flag;
  const char *start;
  DBUG_ENTER("test_if_number");

  flag=0; start=str;
  while (*str++ == ' ') ;
  if (*--str == '-' || *str == '+')
    str++;
4248 4249
  while (my_isdigit(files_charset_info,*str) ||
	 (allow_wildcards && (*str == wild_many || *str == wild_one)))
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4250 4251 4252 4253 4254 4255 4256
  {
    flag=1;
    str++;
  }
  if (*str == '.')
  {
    for (str++ ;
4257
	 my_isdigit(files_charset_info,*str) ||
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bk@work.mysql.com committed
4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276
	   (allow_wildcards && (*str == wild_many || *str == wild_one)) ;
	 str++, flag=1) ;
  }
  if (*str != 0 || flag == 0)
    DBUG_RETURN(0);
  if (res)
    *res=atol(start);
  DBUG_RETURN(1);			/* Number ok */
} /* test_if_number */


void sql_perror(const char *message)
{
#ifdef HAVE_STRERROR
  sql_print_error("%s: %s",message, strerror(errno));
#else
  perror(message);
#endif
}
4277

monty@mysql.com's avatar
monty@mysql.com committed
4278

4279 4280 4281
bool flush_error_log()
{
  bool result=0;
4282
  if (opt_error_log)
4283 4284 4285 4286
  {
    char err_renamed[FN_REFLEN], *end;
    end= strmake(err_renamed,log_error_file,FN_REFLEN-4);
    strmov(end, "-old");
4287
    VOID(pthread_mutex_lock(&LOCK_error_log));
4288 4289 4290 4291 4292 4293
#ifdef __WIN__
    char err_temp[FN_REFLEN+4];
    /*
     On Windows is necessary a temporary file for to rename
     the current error file.
    */
4294
    strxmov(err_temp, err_renamed,"-tmp",NullS);
4295 4296 4297
    (void) my_delete(err_temp, MYF(0)); 
    if (freopen(err_temp,"a+",stdout))
    {
4298 4299 4300 4301
      int fd;
      size_t bytes;
      uchar buf[IO_SIZE];

4302 4303 4304 4305 4306
      freopen(err_temp,"a+",stderr);
      (void) my_delete(err_renamed, MYF(0));
      my_rename(log_error_file,err_renamed,MYF(0));
      if (freopen(log_error_file,"a+",stdout))
        freopen(log_error_file,"a+",stderr);
4307

4308 4309
      if ((fd = my_open(err_temp, O_RDONLY, MYF(0))) >= 0)
      {
4310 4311 4312
        while ((bytes= my_read(fd, buf, IO_SIZE, MYF(0))) &&
               bytes != MY_FILE_ERROR)
          my_fwrite(stderr, buf, bytes, MYF(0));
4313 4314 4315 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325
        my_close(fd, MYF(0));
      }
      (void) my_delete(err_temp, MYF(0)); 
    }
    else
     result= 1;
#else
   my_rename(log_error_file,err_renamed,MYF(0));
   if (freopen(log_error_file,"a+",stdout))
     freopen(log_error_file,"a+",stderr);
   else
     result= 1;
#endif
4326
    VOID(pthread_mutex_unlock(&LOCK_error_log));
4327 4328 4329
  }
   return result;
}
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monty@mashka.mysql.fi committed
4330

4331
void MYSQL_BIN_LOG::signal_update()
monty@mysql.com's avatar
monty@mysql.com committed
4332
{
4333
  DBUG_ENTER("MYSQL_BIN_LOG::signal_update");
monty@mysql.com's avatar
monty@mysql.com committed
4334 4335 4336 4337
  pthread_cond_broadcast(&update_cond);
  DBUG_VOID_RETURN;
}

4338
#ifdef __NT__
4339
static void print_buffer_to_nt_eventlog(enum loglevel level, char *buff,
4340
                                        size_t length, size_t buffLen)
4341 4342
{
  HANDLE event;
4343
  char   *buffptr= buff;
serg@serg.mylan's avatar
serg@serg.mylan committed
4344
  DBUG_ENTER("print_buffer_to_nt_eventlog");
4345

4346 4347
  /* Add ending CR/LF's to string, overwrite last chars if necessary */
  strmov(buffptr+min(length, buffLen-5), "\r\n\r\n");
4348

monty@mysql.com's avatar
monty@mysql.com committed
4349 4350
  setup_windows_event_source();
  if ((event= RegisterEventSource(NULL,"MySQL")))
4351
  {
monty@mysql.com's avatar
monty@mysql.com committed
4352
    switch (level) {
4353
      case ERROR_LEVEL:
monty@mysql.com's avatar
monty@mysql.com committed
4354
        ReportEvent(event, EVENTLOG_ERROR_TYPE, 0, MSG_DEFAULT, NULL, 1, 0,
4355
                    (LPCSTR*)&buffptr, NULL);
4356 4357
        break;
      case WARNING_LEVEL:
monty@mysql.com's avatar
monty@mysql.com committed
4358
        ReportEvent(event, EVENTLOG_WARNING_TYPE, 0, MSG_DEFAULT, NULL, 1, 0,
4359
                    (LPCSTR*) &buffptr, NULL);
4360 4361
        break;
      case INFORMATION_LEVEL:
monty@mysql.com's avatar
monty@mysql.com committed
4362
        ReportEvent(event, EVENTLOG_INFORMATION_TYPE, 0, MSG_DEFAULT, NULL, 1,
4363
                    0, (LPCSTR*) &buffptr, NULL);
4364 4365 4366 4367 4368 4369 4370
        break;
    }
    DeregisterEventSource(event);
  }

  DBUG_VOID_RETURN;
}
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monty@mysql.com committed
4371 4372
#endif /* __NT__ */

4373

4374
/**
monty@mysql.com's avatar
monty@mysql.com committed
4375 4376
  Prints a printf style message to the error log and, under NT, to the
  Windows event log.
4377

4378 4379
  This function prints the message into a buffer and then sends that buffer
  to other functions to write that message to other logging sources.
4380

4381 4382 4383
  @param event_type          Type of event to write (Error, Warning, or Info)
  @param format              Printf style format of message
  @param args                va_list list of arguments for the message
4384

4385
  @returns
4386 4387 4388
    The function always returns 0. The return value is present in the
    signature to be compatible with other logging routines, which could
    return an error (e.g. logging to the log tables)
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
4389
*/
monty@mysql.com's avatar
monty@mysql.com committed
4390

4391
#ifdef EMBEDDED_LIBRARY
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rburnett@production.mysql.com committed
4392
int vprint_msg_to_log(enum loglevel level __attribute__((unused)),
4393 4394
                       const char *format __attribute__((unused)),
                       va_list argsi __attribute__((unused)))
rburnett@production.mysql.com's avatar
rburnett@production.mysql.com committed
4395 4396 4397 4398
{
  DBUG_ENTER("vprint_msg_to_log");
  DBUG_RETURN(0);
}
4399
#else /*!EMBEDDED_LIBRARY*/
4400 4401 4402 4403 4404 4405 4406 4407 4408 4409
static void print_buffer_to_file(enum loglevel level, const char *buffer)
{
  time_t skr;
  struct tm tm_tmp;
  struct tm *start;
  DBUG_ENTER("print_buffer_to_file");
  DBUG_PRINT("enter",("buffer: %s", buffer));

  VOID(pthread_mutex_lock(&LOCK_error_log));

4410
  skr= my_time(0);
4411 4412
  localtime_r(&skr, &tm_tmp);
  start=&tm_tmp;
4413

4414 4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427 4428 4429 4430 4431
  fprintf(stderr, "%02d%02d%02d %2d:%02d:%02d [%s] %s\n",
          start->tm_year % 100,
          start->tm_mon+1,
          start->tm_mday,
          start->tm_hour,
          start->tm_min,
          start->tm_sec,
          (level == ERROR_LEVEL ? "ERROR" : level == WARNING_LEVEL ?
           "Warning" : "Note"),
          buffer);

  fflush(stderr);

  VOID(pthread_mutex_unlock(&LOCK_error_log));
  DBUG_VOID_RETURN;
}


rburnett@production.mysql.com's avatar
rburnett@production.mysql.com committed
4432
int vprint_msg_to_log(enum loglevel level, const char *format, va_list args)
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
4433 4434
{
  char   buff[1024];
4435
  size_t length;
4436
  DBUG_ENTER("vprint_msg_to_log");
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
4437

4438
  length= my_vsnprintf(buff, sizeof(buff), format, args);
serg@serg.mylan's avatar
serg@serg.mylan committed
4439
  print_buffer_to_file(level, buff);
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
4440 4441

#ifdef __NT__
monty@mysql.com's avatar
monty@mysql.com committed
4442
  print_buffer_to_nt_eventlog(level, buff, length, sizeof(buff));
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
4443
#endif
4444

4445
  DBUG_RETURN(0);
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
4446
}
4447
#endif /*EMBEDDED_LIBRARY*/
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rburnett@build.mysql.com committed
4448

4449

monty@mysql.com's avatar
monty@mysql.com committed
4450
void sql_print_error(const char *format, ...) 
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
4451 4452
{
  va_list args;
serg@serg.mylan's avatar
serg@serg.mylan committed
4453
  DBUG_ENTER("sql_print_error");
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
4454

serg@serg.mylan's avatar
serg@serg.mylan committed
4455
  va_start(args, format);
4456
  error_log_print(ERROR_LEVEL, format, args);
serg@serg.mylan's avatar
serg@serg.mylan committed
4457
  va_end(args);
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
4458 4459 4460 4461 4462

  DBUG_VOID_RETURN;
}


monty@mysql.com's avatar
monty@mysql.com committed
4463
void sql_print_warning(const char *format, ...) 
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
4464 4465
{
  va_list args;
serg@serg.mylan's avatar
serg@serg.mylan committed
4466
  DBUG_ENTER("sql_print_warning");
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
4467

serg@serg.mylan's avatar
serg@serg.mylan committed
4468
  va_start(args, format);
4469
  error_log_print(WARNING_LEVEL, format, args);
serg@serg.mylan's avatar
serg@serg.mylan committed
4470
  va_end(args);
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
4471 4472 4473 4474 4475

  DBUG_VOID_RETURN;
}


monty@mysql.com's avatar
monty@mysql.com committed
4476
void sql_print_information(const char *format, ...) 
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
4477 4478
{
  va_list args;
serg@serg.mylan's avatar
serg@serg.mylan committed
4479
  DBUG_ENTER("sql_print_information");
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
4480

serg@serg.mylan's avatar
serg@serg.mylan committed
4481
  va_start(args, format);
4482
  error_log_print(INFORMATION_LEVEL, format, args);
serg@serg.mylan's avatar
serg@serg.mylan committed
4483
  va_end(args);
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
4484

guilhem@mysql.com's avatar
guilhem@mysql.com committed
4485 4486
  DBUG_VOID_RETURN;
}
4487

4488

4489 4490 4491 4492 4493 4494 4495 4496
/********* transaction coordinator log for 2pc - mmap() based solution *******/

/*
  the log consists of a file, mmapped to a memory.
  file is divided on pages of tc_log_page_size size.
  (usable size of the first page is smaller because of log header)
  there's PAGE control structure for each page
  each page (or rather PAGE control structure) can be in one of three
4497 4498
  states - active, syncing, pool.
  there could be only one page in active or syncing states,
4499
  but many in pool - pool is fifo queue.
4500
  usual lifecycle of a page is pool->active->syncing->pool
4501
  "active" page - is a page where new xid's are logged.
4502 4503
  the page stays active as long as syncing slot is taken.
  "syncing" page is being synced to disk. no new xid can be added to it.
4504
  when the sync is done the page is moved to a pool and an active page
4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517
  becomes "syncing".

  the result of such an architecture is a natural "commit grouping" -
  If commits are coming faster than the system can sync, they do not
  stall. Instead, all commit that came since the last sync are
  logged to the same page, and they all are synced with the next -
  one - sync. Thus, thought individual commits are delayed, throughput
  is not decreasing.

  when a xid is added to an active page, the thread of this xid waits
  for a page's condition until the page is synced. when syncing slot
  becomes vacant one of these waiters is awaken to take care of syncing.
  it syncs the page and signals all waiters that the page is synced.
4518 4519 4520 4521
  PAGE::waiters is used to count these waiters, and a page may never
  become active again until waiters==0 (that is all waiters from the
  previous sync have noticed the sync was completed)

4522 4523
  note, that the page becomes "dirty" and has to be synced only when a
  new xid is added into it. Removing a xid from a page does not make it
4524 4525
  dirty - we don't sync removals to disk.
*/
4526 4527 4528 4529 4530

ulong tc_log_page_waits= 0;

#ifdef HAVE_MMAP

4531 4532
#define TC_LOG_HEADER_SIZE (sizeof(tc_log_magic)+1)

4533
static const char tc_log_magic[]={(char) 254, 0x23, 0x05, 0x74};
4534

4535
ulong opt_tc_log_size= TC_LOG_MIN_SIZE;
4536
ulong tc_log_max_pages_used=0, tc_log_page_size=0, tc_log_cur_pages_used=0;
4537 4538 4539 4540 4541 4542 4543

int TC_LOG_MMAP::open(const char *opt_name)
{
  uint i;
  bool crashed=FALSE;
  PAGE *pg;

4544
  DBUG_ASSERT(total_ha_2pc > 1);
4545 4546
  DBUG_ASSERT(opt_name && opt_name[0]);

serg@serg.mylan's avatar
serg@serg.mylan committed
4547
  tc_log_page_size= my_getpagesize();
4548 4549 4550
  DBUG_ASSERT(TC_LOG_PAGE_SIZE % tc_log_page_size == 0);

  fn_format(logname,opt_name,mysql_data_home,"",MY_UNPACK_FILENAME);
4551
  if ((fd= my_open(logname, O_RDWR, MYF(0))) < 0)
4552
  {
4553 4554
    if (my_errno != ENOENT)
      goto err;
4555 4556
    if (using_heuristic_recover())
      return 1;
4557
    if ((fd= my_create(logname, CREATE_MODE, O_RDWR, MYF(MY_WME))) < 0)
4558 4559
      goto err;
    inited=1;
4560
    file_length= opt_tc_log_size;
4561 4562 4563 4564 4565
    if (my_chsize(fd, file_length, 0, MYF(MY_WME)))
      goto err;
  }
  else
  {
4566 4567
    inited= 1;
    crashed= TRUE;
serg@serg.mylan's avatar
serg@serg.mylan committed
4568
    sql_print_information("Recovering after a crash using %s", opt_name);
4569 4570 4571 4572 4573 4574
    if (tc_heuristic_recover)
    {
      sql_print_error("Cannot perform automatic crash recovery when "
                      "--tc-heuristic-recover is used");
      goto err;
    }
4575
    file_length= my_seek(fd, 0L, MY_SEEK_END, MYF(MY_WME+MY_FAE));
4576 4577 4578 4579
    if (file_length == MY_FILEPOS_ERROR || file_length % tc_log_page_size)
      goto err;
  }

4580
  data= (uchar *)my_mmap(0, (size_t)file_length, PROT_READ|PROT_WRITE,
4581 4582 4583 4584 4585 4586 4587 4588
                        MAP_NOSYNC|MAP_SHARED, fd, 0);
  if (data == MAP_FAILED)
  {
    my_errno=errno;
    goto err;
  }
  inited=2;

4589
  npages=(uint)file_length/tc_log_page_size;
4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606
  DBUG_ASSERT(npages >= 3);             // to guarantee non-empty pool
  if (!(pages=(PAGE *)my_malloc(npages*sizeof(PAGE), MYF(MY_WME|MY_ZEROFILL))))
    goto err;
  inited=3;
  for (pg=pages, i=0; i < npages; i++, pg++)
  {
    pg->next=pg+1;
    pg->waiters=0;
    pg->state=POOL;
    pthread_mutex_init(&pg->lock, MY_MUTEX_INIT_FAST);
    pthread_cond_init (&pg->cond, 0);
    pg->start=(my_xid *)(data + i*tc_log_page_size);
    pg->end=(my_xid *)(pg->start + tc_log_page_size);
    pg->size=pg->free=tc_log_page_size/sizeof(my_xid);
  }
  pages[0].size=pages[0].free=
                (tc_log_page_size-TC_LOG_HEADER_SIZE)/sizeof(my_xid);
4607
  pages[0].start=pages[0].end-pages[0].size;
4608 4609 4610
  pages[npages-1].next=0;
  inited=4;

4611
  if (crashed && recover())
4612
      goto err;
4613

4614
  memcpy(data, tc_log_magic, sizeof(tc_log_magic));
4615
  data[sizeof(tc_log_magic)]= (uchar)total_ha_2pc;
4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626
  my_msync(fd, data, tc_log_page_size, MS_SYNC);
  inited=5;

  pthread_mutex_init(&LOCK_sync,    MY_MUTEX_INIT_FAST);
  pthread_mutex_init(&LOCK_active,  MY_MUTEX_INIT_FAST);
  pthread_mutex_init(&LOCK_pool,    MY_MUTEX_INIT_FAST);
  pthread_cond_init(&COND_active, 0);
  pthread_cond_init(&COND_pool, 0);

  inited=6;

4627
  syncing= 0;
4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638
  active=pages;
  pool=pages+1;
  pool_last=pages+npages-1;

  return 0;

err:
  close();
  return 1;
}

4639 4640
/**
  there is no active page, let's got one from the pool.
4641

4642 4643 4644
  Two strategies here:
    -# take the first from the pool
    -# if there're waiters - take the one with the most free space.
4645

4646 4647 4648
  @todo
    TODO page merging. try to allocate adjacent page first,
    so that they can be flushed both in one sync
4649
*/
4650

4651 4652 4653 4654 4655
void TC_LOG_MMAP::get_active_from_pool()
{
  PAGE **p, **best_p=0;
  int best_free;

4656 4657 4658
  if (syncing)
    pthread_mutex_lock(&LOCK_pool);

4659 4660 4661
  do
  {
    best_p= p= &pool;
4662 4663
    if ((*p)->waiters == 0) // can the first page be used ?
      break;                // yes - take it.
4664

4665
    best_free=0;            // no - trying second strategy
4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677
    for (p=&(*p)->next; *p; p=&(*p)->next)
    {
      if ((*p)->waiters == 0 && (*p)->free > best_free)
      {
        best_free=(*p)->free;
        best_p=p;
      }
    }
  }
  while ((*best_p == 0 || best_free == 0) && overflow());

  active=*best_p;
4678
  if (active->free == active->size) // we've chosen an empty page
4679 4680 4681 4682 4683
  {
    tc_log_cur_pages_used++;
    set_if_bigger(tc_log_max_pages_used, tc_log_cur_pages_used);
  }

4684
  if ((*best_p)->next)              // unlink the page from the pool
4685 4686 4687
    *best_p=(*best_p)->next;
  else
    pool_last=*best_p;
4688 4689 4690

  if (syncing)
    pthread_mutex_unlock(&LOCK_pool);
4691 4692
}

4693 4694 4695 4696
/**
  @todo
  perhaps, increase log size ?
*/
4697 4698 4699 4700 4701 4702 4703 4704 4705
int TC_LOG_MMAP::overflow()
{
  /*
    simple overflow handling - just wait
    TODO perhaps, increase log size ?
    let's check the behaviour of tc_log_page_waits first
  */
  tc_log_page_waits++;
  pthread_cond_wait(&COND_pool, &LOCK_pool);
4706
  return 1; // always return 1
4707 4708
}

4709 4710
/**
  Record that transaction XID is committed on the persistent storage.
4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725

    This function is called in the middle of two-phase commit:
    First all resources prepare the transaction, then tc_log->log() is called,
    then all resources commit the transaction, then tc_log->unlog() is called.

    All access to active page is serialized but it's not a problem, as
    we're assuming that fsync() will be a main bottleneck.
    That is, parallelizing writes to log pages we'll decrease number of
    threads waiting for a page, but then all these threads will be waiting
    for a fsync() anyway

   If tc_log == MYSQL_LOG then tc_log writes transaction to binlog and
   records XID in a special Xid_log_event.
   If tc_log = TC_LOG_MMAP then xid is written in a special memory-mapped
   log.
4726

4727 4728 4729 4730 4731 4732 4733
  @retval
    0  - error
  @retval
    \# - otherwise, "cookie", a number that will be passed as an argument
    to unlog() call. tc_log can define it any way it wants,
    and use for whatever purposes. TC_LOG_MMAP sets it
    to the position in memory where xid was logged to.
4734 4735
*/

4736
int TC_LOG_MMAP::log_xid(THD *thd, my_xid xid)
4737 4738 4739 4740 4741 4742 4743
{
  int err;
  PAGE *p;
  ulong cookie;

  pthread_mutex_lock(&LOCK_active);

4744 4745 4746 4747 4748 4749 4750
  /*
    if active page is full - just wait...
    frankly speaking, active->free here accessed outside of mutex
    protection, but it's safe, because it only means we may miss an
    unlog() for the active page, and we're not waiting for it here -
    unlog() does not signal COND_active.
  */
4751 4752 4753
  while (unlikely(active && active->free == 0))
    pthread_cond_wait(&COND_active, &LOCK_active);

4754
  /* no active page ? take one from the pool */
4755 4756 4757 4758 4759 4760
  if (active == 0)
    get_active_from_pool();

  p=active;
  pthread_mutex_lock(&p->lock);

4761
  /* searching for an empty slot */
4762 4763 4764 4765 4766 4767
  while (*p->ptr)
  {
    p->ptr++;
    DBUG_ASSERT(p->ptr < p->end);               // because p->free > 0
  }

4768 4769
  /* found! store xid there and mark the page dirty */
  cookie= (ulong)((uchar *)p->ptr - data);      // can never be zero
4770 4771 4772 4773 4774
  *p->ptr++= xid;
  p->free--;
  p->state= DIRTY;

  /* to sync or not to sync - this is the question */
4775
  pthread_mutex_unlock(&LOCK_active);
4776 4777 4778
  pthread_mutex_lock(&LOCK_sync);
  pthread_mutex_unlock(&p->lock);

4779
  if (syncing)
4780 4781
  {                                          // somebody's syncing. let's wait
    p->waiters++;
4782
    /*
monty@mishka.local's avatar
monty@mishka.local committed
4783
      note - it must be while (), not do ... while () here
4784 4785 4786
      as p->state may be not DIRTY when we come here
    */
    while (p->state == DIRTY && syncing)
4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797
      pthread_cond_wait(&p->cond, &LOCK_sync);
    p->waiters--;
    err= p->state == ERROR;
    if (p->state != DIRTY)                   // page was synced
    {
      if (p->waiters == 0)
        pthread_cond_signal(&COND_pool);     // in case somebody's waiting
      pthread_mutex_unlock(&LOCK_sync);
      goto done;                             // we're done
    }
  }                                          // page was not synced! do it now
4798 4799 4800 4801
  DBUG_ASSERT(active == p && syncing == 0);
  pthread_mutex_lock(&LOCK_active);
  syncing=p;                                 // place is vacant - take it
  active=0;                                  // page is not active anymore
4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814
  pthread_cond_broadcast(&COND_active);      // in case somebody's waiting
  pthread_mutex_unlock(&LOCK_active);
  pthread_mutex_unlock(&LOCK_sync);
  err= sync();

done:
  return err ? 0 : cookie;
}

int TC_LOG_MMAP::sync()
{
  int err;

4815
  DBUG_ASSERT(syncing != active);
4816 4817 4818 4819 4820

  /*
    sit down and relax - this can take a while...
    note - no locks are held at this point
  */
4821
  err= my_msync(fd, syncing->start, 1, MS_SYNC);
4822

4823
  /* page is synced. let's move it to the pool */
4824
  pthread_mutex_lock(&LOCK_pool);
4825 4826 4827 4828 4829
  pool_last->next=syncing;
  pool_last=syncing;
  syncing->next=0;
  syncing->state= err ? ERROR : POOL;
  pthread_cond_broadcast(&syncing->cond);    // signal "sync done"
4830 4831 4832
  pthread_cond_signal(&COND_pool);           // in case somebody's waiting
  pthread_mutex_unlock(&LOCK_pool);

4833
  /* marking 'syncing' slot free */
4834
  pthread_mutex_lock(&LOCK_sync);
4835
  syncing=0;
4836 4837 4838 4839 4840
  pthread_cond_signal(&active->cond);        // wake up a new syncer
  pthread_mutex_unlock(&LOCK_sync);
  return err;
}

4841
/**
4842
  erase xid from the page, update page free space counters/pointers.
4843
  cookie points directly to the memory where xid was logged.
4844
*/
4845

4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858
void TC_LOG_MMAP::unlog(ulong cookie, my_xid xid)
{
  PAGE *p=pages+(cookie/tc_log_page_size);
  my_xid *x=(my_xid *)(data+cookie);

  DBUG_ASSERT(*x == xid);
  DBUG_ASSERT(x >= p->start && x < p->end);
  *x=0;

  pthread_mutex_lock(&p->lock);
  p->free++;
  DBUG_ASSERT(p->free <= p->size);
  set_if_smaller(p->ptr, x);
4859
  if (p->free == p->size)               // the page is completely empty
4860 4861
    statistic_decrement(tc_log_cur_pages_used, &LOCK_status);
  if (p->waiters == 0)                 // the page is in pool and ready to rock
4862
    pthread_cond_signal(&COND_pool);   // ping ... for overflow()
4863 4864 4865 4866 4867
  pthread_mutex_unlock(&p->lock);
}

void TC_LOG_MMAP::close()
{
serg@serg.mylan's avatar
serg@serg.mylan committed
4868
  uint i;
4869 4870 4871 4872 4873 4874 4875 4876 4877
  switch (inited) {
  case 6:
    pthread_mutex_destroy(&LOCK_sync);
    pthread_mutex_destroy(&LOCK_active);
    pthread_mutex_destroy(&LOCK_pool);
    pthread_cond_destroy(&COND_pool);
  case 5:
    data[0]='A'; // garble the first (signature) byte, in case my_delete fails
  case 4:
serg@serg.mylan's avatar
serg@serg.mylan committed
4878
    for (i=0; i < npages; i++)
4879 4880 4881 4882 4883 4884 4885
    {
      if (pages[i].ptr == 0)
        break;
      pthread_mutex_destroy(&pages[i].lock);
      pthread_cond_destroy(&pages[i].cond);
    }
  case 3:
4886
    my_free((uchar*)pages, MYF(0));
4887
  case 2:
4888
    my_munmap((char*)data, (size_t)file_length);
4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913
  case 1:
    my_close(fd, MYF(0));
  }
  if (inited>=5) // cannot do in the switch because of Windows
    my_delete(logname, MYF(MY_WME));
  inited=0;
}

int TC_LOG_MMAP::recover()
{
  HASH xids;
  PAGE *p=pages, *end_p=pages+npages;

  if (memcmp(data, tc_log_magic, sizeof(tc_log_magic)))
  {
    sql_print_error("Bad magic header in tc log");
    goto err1;
  }

  /*
    the first byte after magic signature is set to current
    number of storage engines on startup
  */
  if (data[sizeof(tc_log_magic)] != total_ha_2pc)
  {
4914
    sql_print_error("Recovery failed! You must enable "
4915 4916 4917
                    "exactly %d storage engines that support "
                    "two-phase commit protocol",
                    data[sizeof(tc_log_magic)]);
4918 4919 4920 4921
    goto err1;
  }

  if (hash_init(&xids, &my_charset_bin, tc_log_page_size/3, 0,
4922
                sizeof(my_xid), 0, 0, MYF(0)))
4923 4924 4925 4926 4927
    goto err1;

  for ( ; p < end_p ; p++)
  {
    for (my_xid *x=p->start; x < p->end; x++)
4928
      if (*x && my_hash_insert(&xids, (uchar *)x))
4929 4930 4931 4932 4933 4934 4935
        goto err2; // OOM
  }

  if (ha_recover(&xids))
    goto err2;

  hash_free(&xids);
4936
  bzero(data, (size_t)file_length);
4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947
  return 0;

err2:
  hash_free(&xids);
err1:
  sql_print_error("Crash recovery failed. Either correct the problem "
                  "(if it's, for example, out of memory error) and restart, "
                  "or delete tc log and start mysqld with "
                  "--tc-heuristic-recover={commit|rollback}");
  return 1;
}
serg@serg.mylan's avatar
serg@serg.mylan committed
4948 4949 4950 4951 4952
#endif

TC_LOG *tc_log;
TC_LOG_DUMMY tc_log_dummy;
TC_LOG_MMAP  tc_log_mmap;
4953

4954 4955
/**
  Perform heuristic recovery, if --tc-heuristic-recover was used.
4956

4957
  @note
4958 4959
    no matter whether heuristic recovery was successful or not
    mysqld must exit. So, return value is the same in both cases.
4960 4961 4962 4963 4964

  @retval
    0	no heuristic recovery was requested
  @retval
    1   heuristic recovery was performed
4965 4966
*/

4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979
int TC_LOG::using_heuristic_recover()
{
  if (!tc_heuristic_recover)
    return 0;

  sql_print_information("Heuristic crash recovery mode");
  if (ha_recover(0))
    sql_print_error("Heuristic crash recovery failed");
  sql_print_information("Please restart mysqld without --tc-heuristic-recover");
  return 1;
}

/****** transaction coordinator log for 2pc - binlog() based solution ******/
4980
#define TC_LOG_BINLOG MYSQL_BIN_LOG
4981

4982 4983 4984
/**
  @todo
  keep in-memory list of prepared transactions
4985 4986 4987 4988 4989
  (add to list in log(), remove on unlog())
  and copy it to the new binlog if rotated
  but let's check the behaviour of tc_log_page_waits first!
*/

4990
int TC_LOG_BINLOG::open(const char *opt_name)
4991
{
4992 4993
  LOG_INFO log_info;
  int      error= 1;
4994 4995

  DBUG_ASSERT(total_ha_2pc > 1);
4996
  DBUG_ASSERT(opt_name && opt_name[0]);
4997 4998 4999 5000

  pthread_mutex_init(&LOCK_prep_xids, MY_MUTEX_INIT_FAST);
  pthread_cond_init (&COND_prep_xids, 0);

5001 5002 5003 5004 5005 5006 5007
  if (!my_b_inited(&index_file))
  {
    /* There was a failure to open the index file, can't open the binlog */
    cleanup();
    return 1;
  }

5008
  if (using_heuristic_recover())
5009 5010 5011 5012
  {
    /* generate a new binlog to mask a corrupted one */
    open(opt_name, LOG_BIN, 0, WRITE_CACHE, 0, max_binlog_size, 0);
    cleanup();
5013
    return 1;
5014
  }
5015

5016
  if ((error= find_log_pos(&log_info, NullS, 1)))
5017
  {
5018 5019 5020 5021 5022
    if (error != LOG_INFO_EOF)
      sql_print_error("find_log_pos() failed (error: %d)", error);
    else
      error= 0;
    goto err;
5023
  }
5024 5025 5026 5027 5028

  {
    const char *errmsg;
    IO_CACHE    log;
    File        file;
5029 5030
    Log_event  *ev=0;
    Format_description_log_event fdle(BINLOG_VERSION);
5031
    char        log_name[FN_REFLEN];
5032 5033 5034 5035

    if (! fdle.is_valid())
      goto err;

5036
    do
5037
    {
5038 5039 5040 5041 5042 5043 5044
      strmake(log_name, log_info.log_file_name, sizeof(log_name)-1);
    } while (!(error= find_next_log(&log_info, 1)));

    if (error !=  LOG_INFO_EOF)
    {
      sql_print_error("find_log_pos() failed (error: %d)", error);
      goto err;
5045
    }
5046

5047
    if ((file= open_binlog(&log, log_name, &errmsg)) < 0)
5048 5049 5050 5051 5052
    {
      sql_print_error("%s", errmsg);
      goto err;
    }

5053 5054 5055
    if ((ev= Log_event::read_log_event(&log, 0, &fdle)) &&
        ev->get_type_code() == FORMAT_DESCRIPTION_EVENT &&
        ev->flags & LOG_EVENT_BINLOG_IN_USE_F)
serg@serg.mylan's avatar
serg@serg.mylan committed
5056 5057
    {
      sql_print_information("Recovering after a crash using %s", opt_name);
5058
      error= recover(&log, (Format_description_log_event *)ev);
serg@serg.mylan's avatar
serg@serg.mylan committed
5059
    }
5060 5061
    else
      error=0;
5062 5063 5064 5065 5066 5067 5068 5069 5070 5071

    delete ev;
    end_io_cache(&log);
    my_close(file, MYF(MY_WME));

    if (error)
      goto err;
  }

err:
5072
  return error;
5073 5074
}

5075
/** This is called on shutdown, after ha_panic. */
5076
void TC_LOG_BINLOG::close()
5077 5078 5079 5080 5081 5082
{
  DBUG_ASSERT(prepared_xids==0);
  pthread_mutex_destroy(&LOCK_prep_xids);
  pthread_cond_destroy (&COND_prep_xids);
}

5083 5084 5085
/**
  @todo
  group commit
5086

5087 5088 5089 5090
  @retval
    0    error
  @retval
    1    success
5091
*/
5092
int TC_LOG_BINLOG::log_xid(THD *thd, my_xid xid)
5093
{
5094
  DBUG_ENTER("TC_LOG_BINLOG::log");
5095
  Xid_log_event xle(thd, xid);
5096
  binlog_trx_data *trx_data=
5097
    (binlog_trx_data*) thd_get_ha_data(thd, binlog_hton);
5098 5099 5100 5101 5102
  /*
    We always commit the entire transaction when writing an XID. Also
    note that the return value is inverted.
   */
  DBUG_RETURN(!binlog_end_trans(thd, trx_data, &xle, TRUE));
5103 5104
}

5105
void TC_LOG_BINLOG::unlog(ulong cookie, my_xid xid)
5106
{
5107
  pthread_mutex_lock(&LOCK_prep_xids);
5108
  DBUG_ASSERT(prepared_xids > 0);
5109 5110
  if (--prepared_xids == 0) {
    DBUG_PRINT("info", ("prepared_xids=%lu", prepared_xids));
5111
    pthread_cond_signal(&COND_prep_xids);
5112
  }
5113
  pthread_mutex_unlock(&LOCK_prep_xids);
5114
  rotate_and_purge(0);     // as ::write() did not rotate
5115 5116
}

5117
int TC_LOG_BINLOG::recover(IO_CACHE *log, Format_description_log_event *fdle)
5118 5119 5120 5121 5122 5123
{
  Log_event  *ev;
  HASH xids;
  MEM_ROOT mem_root;

  if (! fdle->is_valid() ||
5124
      hash_init(&xids, &my_charset_bin, TC_LOG_PAGE_SIZE/3, 0,
5125
                sizeof(my_xid), 0, 0, MYF(0)))
5126 5127
    goto err1;

5128
  init_alloc_root(&mem_root, TC_LOG_PAGE_SIZE, TC_LOG_PAGE_SIZE);
5129

5130 5131
  fdle->flags&= ~LOG_EVENT_BINLOG_IN_USE_F; // abort on the first error

5132 5133 5134 5135 5136
  while ((ev= Log_event::read_log_event(log,0,fdle)) && ev->is_valid())
  {
    if (ev->get_type_code() == XID_EVENT)
    {
      Xid_log_event *xev=(Xid_log_event *)ev;
5137 5138
      uchar *x= (uchar *) memdup_root(&mem_root, (uchar*) &xev->xid,
                                      sizeof(xev->xid));
5139 5140 5141 5142 5143 5144 5145 5146 5147 5148 5149 5150 5151 5152 5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163
      if (! x)
        goto err2;
      my_hash_insert(&xids, x);
    }
    delete ev;
  }

  if (ha_recover(&xids))
    goto err2;

  free_root(&mem_root, MYF(0));
  hash_free(&xids);
  return 0;

err2:
  free_root(&mem_root, MYF(0));
  hash_free(&xids);
err1:
  sql_print_error("Crash recovery failed. Either correct the problem "
                  "(if it's, for example, out of memory error) and restart, "
                  "or delete (or rename) binary log and start mysqld with "
                  "--tc-heuristic-recover={commit|rollback}");
  return 1;
}

5164 5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 5186

#ifdef INNODB_COMPATIBILITY_HOOKS
/**
  Get the file name of the MySQL binlog.
  @return the name of the binlog file
*/
extern "C"
const char* mysql_bin_log_file_name(void)
{
  return mysql_bin_log.get_log_fname();
}
/**
  Get the current position of the MySQL binlog.
  @return byte offset from the beginning of the binlog
*/
extern "C"
ulonglong mysql_bin_log_file_pos(void)
{
  return (ulonglong) mysql_bin_log.get_log_file()->pos_in_file;
}
#endif /* INNODB_COMPATIBILITY_HOOKS */


5187
struct st_mysql_storage_engine binlog_storage_engine=
5188
{ MYSQL_HANDLERTON_INTERFACE_VERSION };
acurtis@xiphis.org's avatar
acurtis@xiphis.org committed
5189 5190 5191 5192

mysql_declare_plugin(binlog)
{
  MYSQL_STORAGE_ENGINE_PLUGIN,
5193 5194
  &binlog_storage_engine,
  "binlog",
acurtis@xiphis.org's avatar
acurtis@xiphis.org committed
5195
  "MySQL AB",
5196
  "This is a pseudo storage engine to represent the binlog in a transaction",
5197
  PLUGIN_LICENSE_GPL,
5198
  binlog_init, /* Plugin Init */
acurtis@xiphis.org's avatar
acurtis@xiphis.org committed
5199 5200
  NULL, /* Plugin Deinit */
  0x0100 /* 1.0 */,
5201 5202 5203
  NULL,                       /* status variables                */
  NULL,                       /* system variables                */
  NULL                        /* config options                  */
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acurtis@xiphis.org committed
5204 5205
}
mysql_declare_plugin_end;