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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
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
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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 */


/* logging of commands */
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/* 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 <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

/* we need this for log files intialization */
extern char *opt_logname, *opt_slow_logname;

LOGGER logger;

MYSQL_LOG mysql_bin_log;
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ulong sync_binlog_counter= 0;
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static bool test_if_number(const char *str,
			   long *res, bool allow_wildcards);
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static bool binlog_init();
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static int binlog_close_connection(THD *thd);
static int binlog_savepoint_set(THD *thd, void *sv);
static int binlog_savepoint_rollback(THD *thd, void *sv);
static int binlog_commit(THD *thd, bool all);
static int binlog_rollback(THD *thd, bool all);
static int binlog_prepare(THD *thd, bool all);

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/*
  This is a POD. Please keep it that way!

  Don't add constructors, destructors, or virtual functions.
*/
struct binlog_trx_data {
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  bool empty() const
  {
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    return pending == NULL && my_b_tell(&trans_log) == 0;
  }
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  binlog_trx_data() {}
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  IO_CACHE trans_log;                         // The transaction cache
  Rows_log_event *pending;                // The pending binrows event
};

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static const char binlog_hton_name[]= "binlog";
static const char binlog_hton_comment[]=
  "This is a meta storage engine to represent the binlog in a transaction";

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handlerton binlog_hton = {
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  MYSQL_HANDLERTON_INTERFACE_VERSION,
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  binlog_hton_name,
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  SHOW_OPTION_YES,
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  binlog_hton_comment,
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  DB_TYPE_BINLOG,               /* IGNORE  for now */
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  binlog_init,
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  0,
  sizeof(my_off_t),             /* savepoint size = binlog offset */
  binlog_close_connection,
  binlog_savepoint_set,
  binlog_savepoint_rollback,
  NULL,                         /* savepoint_release */
  binlog_commit,
  binlog_rollback,
  binlog_prepare,
  NULL,                         /* recover */
  NULL,                         /* commit_by_xid */
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  NULL,                         /* rollback_by_xid */
  NULL,                         /* create_cursor_read_view */
  NULL,                         /* set_cursor_read_view */
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  NULL,                         /* close_cursor_read_view */
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  NULL,                         /* Create a new handler */
  NULL,                         /* Drop a database */
  NULL,                         /* Panic call */
  NULL,                         /* Start Consistent Snapshot */
  NULL,                         /* Flush logs */
  NULL,                         /* Show status */
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  NULL,                         /* Partition flags */
  NULL,                         /* Alter table flags */
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  NULL,                         /* Alter Tablespace */
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  NULL,                         /* Fill FILES table */
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  HTON_NOT_USER_SELECTABLE | HTON_HIDDEN,
  NULL,                         /* binlog_func */
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  NULL,                         /* binlog_log_query */
  NULL				/* release_temporary_latches */
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};

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/*
  Open log table of a given type (general or slow log)

  SYNOPSIS
    open_log_table()

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    log_type   type of the log table to open: QUERY_LOG_GENERAL
               or QUERY_LOG_SLOW
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  DESCRIPTION

    The function opens a log table and marks it as such. Log tables are open
    during the whole time, while server is running. Except for the moments
    when they have to be reopened: during FLUSH LOGS and TRUNCATE. This
    function is invoked directly only once during startup. All subsequent
    calls happen through reopen_log_table(), which performs additional check.

  RETURN
    FALSE - OK
    TRUE - error occured
*/

bool Log_to_csv_event_handler::open_log_table(uint log_type)
{
  THD *log_thd, *curr= current_thd;
  TABLE_LIST *table;
  bool error= FALSE;
  DBUG_ENTER("open_log_table");

  switch (log_type) {
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  case QUERY_LOG_GENERAL:
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    log_thd= general_log_thd;
    table= &general_log;
    /* clean up table before reuse/initial usage */
    bzero((char*) table, sizeof(TABLE_LIST));
    table->alias= table->table_name= (char*) "general_log";
    table->table_name_length= 11;
    break;
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  case QUERY_LOG_SLOW:
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    log_thd= slow_log_thd;
    table= &slow_log;
    bzero((char*) table, sizeof(TABLE_LIST));
    table->alias= table->table_name= (char*) "slow_log";
    table->table_name_length= 8;
    break;
  default:
    DBUG_ASSERT(0);
  }

  /*
    This way we check that appropriate log thd was created ok during
    initialization. We cannot check "is_log_tables_initialized" var, as
    the very initialization is not finished until this function is
    completed in the very first time.
  */
  if (!log_thd)
  {
    DBUG_PRINT("error",("Cannot initialize log tables"));
    DBUG_RETURN(TRUE);
  }

  /*
    Set THD's thread_stack. This is needed to perform stack overrun
    check, which is done by some routines (e.g. open_table()).
    In the case we are called by thread, which already has this parameter
    set, we use this value. Otherwise we do a wild guess. This won't help
    to correctly track the stack overrun in these exceptional cases (which
    could probably happen only during startup and shutdown) but at least
    lets us to pass asserts.
    The problem stems from the fact that logger THDs are not real threads.
  */
  if (curr)
    log_thd->thread_stack= curr->thread_stack;
  else
    log_thd->thread_stack= (char*) &log_thd;

  log_thd->store_globals();

  table->lock_type= TL_WRITE_CONCURRENT_INSERT;
  table->db= log_thd->db;
  table->db_length= log_thd->db_length;

  if (simple_open_n_lock_tables(log_thd, table) ||
      table->table->file->extra(HA_EXTRA_MARK_AS_LOG_TABLE) ||
      table->table->file->ha_rnd_init(0))
    error= TRUE;
  else
    table->table->locked_by_logger= TRUE;

  /* restore thread settings */
  if (curr)
    curr->store_globals();
  else
  {
    my_pthread_setspecific_ptr(THR_THD,  0);
    my_pthread_setspecific_ptr(THR_MALLOC, 0);
  }

  DBUG_RETURN(error);
}


Log_to_csv_event_handler::Log_to_csv_event_handler()
{
  /* init artificial THD's */
  general_log_thd= new THD;
  /* logger thread always works with mysql database */
  general_log_thd->db= my_strdup("mysql", MYF(0));
  general_log_thd->db_length= 5;

  slow_log_thd= new THD;
  /* logger thread always works with mysql database */
  slow_log_thd->db= my_strdup("mysql", MYF(0));;
  slow_log_thd->db_length= 5;
}


Log_to_csv_event_handler::~Log_to_csv_event_handler()
{
  /* now cleanup the tables */
  if (general_log_thd)
  {
    delete general_log_thd;
    general_log_thd= NULL;
  }

  if (slow_log_thd)
  {
    delete slow_log_thd;
    slow_log_thd= NULL;
  }
}


/*
  Reopen log table of a given type

  SYNOPSIS
    reopen_log_table()

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    log_type   type of the log table to open: QUERY_LOG_GENERAL
               or QUERY_LOG_SLOW
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  DESCRIPTION

    The function is a wrapper around open_log_table(). It is used during
    FLUSH LOGS and TRUNCATE of the log tables (i.e. when we need to close
    and reopen them). The difference is in the check of the
    logger.is_log_tables_initialized var, which can't be done in
    open_log_table(), as it makes no sense during startup.

    NOTE: this code assumes that we have logger mutex locked

  RETURN
    FALSE - ok
    TRUE - open_log_table() returned an error
*/

bool Log_to_csv_event_handler::reopen_log_table(uint log_type)
{
  /* don't open the log table, if it wasn't enabled during startup */
  if (!logger.is_log_tables_initialized)
    return FALSE;
  return open_log_table(log_type);
}

void Log_to_csv_event_handler::cleanup()
{
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  close_log_table(QUERY_LOG_GENERAL, FALSE);
  close_log_table(QUERY_LOG_SLOW, FALSE);
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  logger.is_log_tables_initialized= FALSE;
}

/* log event handlers */

/*
  Log command to the general log table

  SYNOPSIS
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    log_general()
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    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 the general log table

  RETURN
    FALSE - OK
    TRUE - error occured
*/

bool Log_to_csv_event_handler::
  log_general(time_t event_time, const char *user_host,
              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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{
  TABLE *table= general_log.table;

  /* below should never happen */
  if (unlikely(!logger.is_log_tables_initialized))
    return FALSE;

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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).
  */

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  /* log table entries are not replicated at the moment */
  tmp_disable_binlog(current_thd);

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  /* Set current time. Required for CURRENT_TIMESTAMP to work */
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  general_log_thd->start_time= event_time;
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  /*
    We do not set a value for table->field[0], as it will use
    default value (which is CURRENT_TIMESTAMP).
  */
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  table->field[1]->store(user_host, user_host_len, client_cs);
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  table->field[1]->set_notnull();
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  table->field[2]->store((longlong) thread_id);
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  table->field[2]->set_notnull();
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  table->field[3]->store((longlong) server_id);
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  table->field[3]->set_notnull();
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  table->field[4]->store(command_type, command_type_len, client_cs);
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  table->field[4]->set_notnull();
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  table->field[5]->store(sql_text, sql_text_len, client_cs);
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  table->field[5]->set_notnull();
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  table->file->ha_write_row(table->record[0]);

  reenable_binlog(current_thd);

  return FALSE;
}


/*
  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
    query_time        Amount of time the query took to execute (in seconds)
    lock_time         Amount of time the query was locked (in seconds)
    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,
           longlong query_time, longlong lock_time, bool is_command,
           const char *sql_text, uint sql_text_len)
{
  /* table variables */
  TABLE *table= slow_log.table;
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  CHARSET_INFO *client_cs= thd->variables.character_set_client;
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  DBUG_ENTER("log_slow");
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  /* below should never happen */
  if (unlikely(!logger.is_log_tables_initialized))
    return FALSE;

  /* log table entries are not replicated at the moment */
  tmp_disable_binlog(current_thd);

  /*
     Set start time for CURRENT_TIMESTAMP to the start of the query.
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     This will be default value for the field[0]
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  */
  slow_log_thd->start_time= query_start_arg;
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  restore_record(table, s->default_values);    // Get empty record
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  /*
    We do not set a value for table->field[0], as it will use
    default value.
  */
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  /* store the value */
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  table->field[1]->store(user_host, user_host_len, client_cs);
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  if (query_start_arg)
  {
    /* fill in query_time field */
    table->field[2]->store(query_time);
    /* lock_time */
    table->field[3]->store(lock_time);
    /* rows_sent */
    table->field[4]->store((longlong) thd->sent_row_count);
    /* rows_examined */
    table->field[5]->store((longlong) thd->examined_row_count);
  }
  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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    table->field[6]->store(thd->db, thd->db_length, client_cs);
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    table->field[6]->set_notnull();
  }
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  if (thd->last_insert_id_used)
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  {
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    table->field[7]->store((longlong) thd->current_insert_id);
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    table->field[7]->set_notnull();
  }
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  /* set value if we do an insert on autoincrement column */
  if (thd->insert_id_used)
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  {
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    table->field[8]->store((longlong) thd->last_insert_id);
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    table->field[8]->set_notnull();
  }
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  table->field[9]->store((longlong) server_id);
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  table->field[9]->set_notnull();
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  /* sql_text */
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  table->field[10]->store(sql_text,sql_text_len, client_cs);
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  /* write the row */
  table->file->ha_write_row(table->record[0]);

  reenable_binlog(current_thd);

  DBUG_RETURN(0);
}

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();
}


/* Wrapper around MYSQL_LOG::write() for slow log */

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,
           longlong query_time, longlong lock_time, bool is_command,
           const char *sql_text, uint sql_text_len)
{
  return mysql_slow_log.write(thd, current_time, query_start_arg,
                              user_host, user_host_len,
                              query_time, lock_time, is_command,
                              sql_text, sql_text_len);
}


/*
   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::
  log_general(time_t event_time, const char *user_host,
              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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{
  return mysql_log.write(event_time, user_host, user_host_len,
                         thread_id, command_type, command_type_len,
                         sql_text, sql_text_len);
}


bool Log_to_file_event_handler::init()
{
  if (!is_initialized)
  {
    if (opt_slow_log)
      mysql_slow_log.open_slow_log(opt_slow_logname);

    if (opt_log)
      mysql_log.open_query_log(opt_logname);

    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 */
  mysql_log.new_file(1);
  mysql_slow_log.new_file(1);
}

/*
  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;
  Log_event_handler **current_handler= error_log_handler_list;

  /* currently we don't need locking here as there is no error_log table */
  while (*current_handler)
    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);
  (void) pthread_mutex_destroy(&LOCK_logger);
  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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void LOGGER::close_log_table(uint log_type, bool lock_in_use)
{
  table_log_handler->close_log_table(log_type, lock_in_use);
}


/*
  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();
  (void) pthread_mutex_init(&LOCK_logger, MY_MUTEX_INIT_SLOW);
}


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;
}


bool LOGGER::reopen_log_table(uint log_type)
{
  return table_log_handler->reopen_log_table(log_type);
}


bool LOGGER::flush_logs(THD *thd)
{
  TABLE_LIST close_slow_log, close_general_log;

  /* reopen log tables */
  bzero((char*) &close_slow_log, sizeof(TABLE_LIST));
  close_slow_log.alias= close_slow_log.table_name=(char*) "slow_log";
  close_slow_log.table_name_length= 8;
  close_slow_log.db= (char*) "mysql";
  close_slow_log.db_length= 5;

  bzero((char*) &close_general_log, sizeof(TABLE_LIST));
  close_general_log.alias= close_general_log.table_name=(char*) "general_log";
  close_general_log.table_name_length= 11;
  close_general_log.db= (char*) "mysql";
  close_general_log.db_length= 5;

  /* reopen log files */
  file_log_handler->flush();

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  /* flush tables, in the case they are enabled */
  if (logger.is_log_tables_initialized)
  {
    /*
      This will lock and wait for all but the logger thread to release the
      tables. Then we could reopen log tables. Then release the name locks.

      NOTE: in fact, the first parameter used in lock_and_wait_for_table_name()
      and table_log_handler->flush() could be any non-NULL THD, as the
      underlying code makes certain assumptions about this.
      Here we use one of the logger handler THD's. Simply because it
      seems appropriate.
    */
    lock_and_wait_for_table_name(table_log_handler->general_log_thd,
                                 &close_slow_log);
    lock_and_wait_for_table_name(table_log_handler->general_log_thd,
                                 &close_general_log);

    /*
      Deny others from logging to general and slow log,
      while reopening tables.
    */
    logger.lock();

    table_log_handler->flush(table_log_handler->general_log_thd,
                             &close_slow_log, &close_general_log);

    /* end of log tables flush */
    logger.unlock();
  }
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  return FALSE;
}


/*
  Log slow query with all enabled log event handlers

  SYNOPSIS
    slow_log_print()

    thd               THD of the query being logged
    query             The query being logged
    query_length      The length of the query string
    query_start_arg   Query start timestamp

  RETURN
    FALSE - OK
    TRUE - error occured
*/

bool LOGGER::slow_log_print(THD *thd, const char *query, uint query_length,
                            time_t query_start_arg)
{
  bool error= FALSE;
  Log_event_handler **current_handler= slow_log_handler_list;
  bool is_command= FALSE;
  char user_host_buff[MAX_USER_HOST_SIZE];

  my_time_t current_time;
  Security_context *sctx= thd->security_ctx;
  uint message_buff_len= 0, user_host_len= 0;
  longlong query_time= 0, lock_time= 0;
  longlong last_insert_id= 0, insert_id= 0;

  /*
    Print the message to the buffer if we have slow log enabled
  */

  if (*slow_log_handler_list)
  {
    current_time= time(NULL);

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    /* do not log slow queries from replication threads */
    if (thd->slave_thread)
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      return 0;

    lock();

    /* fill in user_host value: the format is "%s[%s] @ %s [%s]" */
    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;

    if (query_start_arg)
    {
      query_time= (longlong) (current_time - query_start_arg);
      lock_time= (longlong) (thd->time_after_lock - query_start_arg);
    }

    if (thd->last_insert_id_used)
      last_insert_id= (longlong) thd->current_insert_id;

    /* set value if we do an insert on autoincrement column */
    if (thd->insert_id_used)
      insert_id= (longlong) thd->last_insert_id;

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

    while (*current_handler)
      error= (*current_handler++)->log_slow(thd, current_time, query_start_arg,
                                            user_host_buff, user_host_len,
                                            query_time, lock_time, is_command,
                                            query, query_length) || error;

    unlock();
  }
  return error;
}

bool LOGGER::general_log_print(THD *thd, enum enum_server_command command,
                               const char *format, va_list args)
{
  bool error= FALSE;
  Log_event_handler **current_handler= general_log_handler_list;

  /*
    Print the message to the buffer 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)))
  {
    char message_buff[MAX_LOG_BUFFER_SIZE];
    char user_host_buff[MAX_USER_HOST_SIZE];
    Security_context *sctx= thd->security_ctx;
    ulong id;
    uint message_buff_len= 0, user_host_len= 0;

    if (thd)
    {                                           /* Normal thread */
      if ((thd->options & OPTION_LOG_OFF)
#ifndef NO_EMBEDDED_ACCESS_CHECKS
          && (sctx->master_access & SUPER_ACL)
#endif
         )
      {
        return 0;                         /* No logging */
      }
      id= thd->thread_id;
    }
    else
      id=0;                                     /* Log from connect handler */

    lock();
    time_t current_time= time(NULL);

    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;

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

    while (*current_handler)
      error+= (*current_handler++)->
        log_general(current_time, user_host_buff,
                   user_host_len, id,
                   command_name[(uint) command].str,
                   command_name[(uint) command].length,
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                   message_buff, message_buff_len,
                   thd->variables.character_set_client) || error;
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    unlock();
  }
  return error;
}

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void LOGGER::init_error_log(uint error_log_printer)
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{
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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;
  }
}


bool Log_to_csv_event_handler::flush(THD *thd, TABLE_LIST *close_slow_log,
                                     TABLE_LIST *close_general_log)
{
  VOID(pthread_mutex_lock(&LOCK_open));
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  close_log_table(QUERY_LOG_GENERAL, TRUE);
  close_log_table(QUERY_LOG_SLOW, TRUE);
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  close_general_log->next_local= close_slow_log;
  query_cache_invalidate3(thd, close_general_log, 0);
  unlock_table_name(thd, close_slow_log);
  unlock_table_name(thd, close_general_log);
  VOID(pthread_mutex_unlock(&LOCK_open));
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  return reopen_log_table(QUERY_LOG_SLOW) ||
         reopen_log_table(QUERY_LOG_GENERAL);
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}

/* the parameters are unused for the log tables */
bool Log_to_csv_event_handler::init()
{
  /* we always open log tables. even if the logging is disabled */
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  return (open_log_table(QUERY_LOG_GENERAL) || open_log_table(QUERY_LOG_SLOW));
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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);
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  lock();

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  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;
}


/*
  Close log table of a given type (general or slow log)

  SYNOPSIS
    close_log_table()

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    log_type       type of the log table to close: QUERY_LOG_GENERAL
                   or QUERY_LOG_SLOW
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    lock_in_use    Set to TRUE if the caller owns LOCK_open. FALSE otherwise.

  DESCRIPTION

    The function closes a log table. It is invoked (1) when we need to reopen
    log tables (e.g. FLUSH LOGS or TRUNCATE on the log table is being
    executed) or (2) during shutdown.
*/

void Log_to_csv_event_handler::
  close_log_table(uint log_type, bool lock_in_use)
{
  THD *log_thd, *curr= current_thd;
  TABLE_LIST *table;

  if (!logger.is_log_tables_initialized)
    return;                                     /* do nothing */

  switch (log_type) {
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  case QUERY_LOG_GENERAL:
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    log_thd= general_log_thd;
    table= &general_log;
    break;
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  case QUERY_LOG_SLOW:
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    log_thd= slow_log_thd;
    table= &slow_log;
    break;
  default:
    DBUG_ASSERT(0);
  }

  /*
    Set thread stack start for the logger thread. See comment in
    open_log_table() for details.
  */
  if (curr)
    log_thd->thread_stack= curr->thread_stack;
  else
    log_thd->thread_stack= (char*) &log_thd;

  /* close the table */
  log_thd->store_globals();
  table->table->file->ha_rnd_end();
  /* discard logger mark before unlock*/
  table->table->locked_by_logger= FALSE;
  close_thread_tables(log_thd, lock_in_use);

  if (curr)
    curr->store_globals();
  else
  {
    my_pthread_setspecific_ptr(THR_THD,  0);
    my_pthread_setspecific_ptr(THR_MALLOC, 0);
  }
}


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

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bool binlog_init()
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{
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  return !opt_bin_log;
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}

static int binlog_close_connection(THD *thd)
{
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  binlog_trx_data *const trx_data=
    (binlog_trx_data*) thd->ha_data[binlog_hton.slot];
  IO_CACHE *trans_log= &trx_data->trans_log;
  DBUG_ASSERT(mysql_bin_log.is_open() && trx_data->empty());
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  close_cached_file(trans_log);
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  thd->ha_data[binlog_hton.slot]= 0;
  my_free((gptr)trx_data, MYF(0));
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  return 0;
}

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static int
binlog_end_trans(THD *thd, binlog_trx_data *trx_data, Log_event *end_ev)
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{
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  DBUG_ENTER("binlog_end_trans");
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  int error=0;
  IO_CACHE *trans_log= &trx_data->trans_log;

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  if (end_ev)
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  {
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    /*
      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.
     */
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    thd->binlog_flush_pending_rows_event(TRUE);
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    error= mysql_bin_log.write(thd, trans_log, end_ev);
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  }
  else
  {
    thd->binlog_delete_pending_rows_event();
  }

  /*
    We need to step the table map version both after writing the
    entire transaction to the log file and after rolling back the
    transaction.

    We need to step the table map version after writing the
    transaction cache to disk.  In addition, 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.
  */
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  mysql_bin_log.update_table_map_version();
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  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;
  }
  reinit_io_cache(trans_log, WRITE_CACHE, (my_off_t) 0, 0, 1); // cannot fail
  trans_log->end_of_file= max_binlog_cache_size;
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  DBUG_RETURN(error);
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}

static int binlog_prepare(THD *thd, bool all)
{
  /*
    do nothing.
    just pretend we can do 2pc, so that MySQL won't
    switch to 1pc.
    real work will be done in MYSQL_LOG::log()
  */
  return 0;
}

static int binlog_commit(THD *thd, bool all)
{
  DBUG_ENTER("binlog_commit");
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  binlog_trx_data *const trx_data=
    (binlog_trx_data*) thd->ha_data[binlog_hton.slot];
  IO_CACHE *trans_log= &trx_data->trans_log;
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  DBUG_ASSERT(mysql_bin_log.is_open() &&
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     (all || !(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))));
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  if (trx_data->empty())
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  {
    // we're here because trans_log was flushed in MYSQL_LOG::log()
    DBUG_RETURN(0);
  }
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  Query_log_event qev(thd, STRING_WITH_LEN("COMMIT"), TRUE, FALSE);
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  qev.error_code= 0; // see comment in MYSQL_LOG::write(THD, IO_CACHE)
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  DBUG_RETURN(binlog_end_trans(thd, trx_data, &qev));
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}

static int binlog_rollback(THD *thd, bool all)
{
  DBUG_ENTER("binlog_rollback");
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  int error=0;
  binlog_trx_data *const trx_data=
    (binlog_trx_data*) thd->ha_data[binlog_hton.slot];
  IO_CACHE *trans_log= &trx_data->trans_log;
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  /*
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    First assert is guaranteed - see trans_register_ha() call below.
    The second must be true. If it is not, we're registering
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    unnecessary, doing extra work. The cause should be found and eliminated
  */
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  DBUG_ASSERT(all || !(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)));
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  DBUG_ASSERT(mysql_bin_log.is_open() && !trx_data->empty());
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  /*
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    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...)
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  */
  if (unlikely(thd->options & OPTION_STATUS_NO_TRANS_UPDATE))
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  {
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    Query_log_event qev(thd, STRING_WITH_LEN("ROLLBACK"), TRUE, FALSE);
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    qev.error_code= 0; // see comment in MYSQL_LOG::write(THD, IO_CACHE)
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    error= binlog_end_trans(thd, trx_data, &qev);
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  }
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  else
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    error= binlog_end_trans(thd, trx_data, 0);
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  DBUG_RETURN(error);
}

/*
  NOTE: how do we handle this (unlikely but legal) case:
  [transaction] + [update to non-trans table] + [rollback to savepoint] ?
  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).
*/

static int binlog_savepoint_set(THD *thd, void *sv)
{
  DBUG_ENTER("binlog_savepoint_set");
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  binlog_trx_data *const trx_data=
    (binlog_trx_data*) thd->ha_data[binlog_hton.slot];
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  DBUG_ASSERT(mysql_bin_log.is_open() && my_b_tell(&trx_data->trans_log));
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  *(my_off_t *)sv= my_b_tell(&trx_data->trans_log);
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  /* Write it to the binary log */
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  int const error=
    thd->binlog_query(THD::STMT_QUERY_TYPE,
                      thd->query, thd->query_length, TRUE, FALSE);
  DBUG_RETURN(error);
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}

static int binlog_savepoint_rollback(THD *thd, void *sv)
{
  DBUG_ENTER("binlog_savepoint_rollback");
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  binlog_trx_data *const trx_data=
    (binlog_trx_data*) thd->ha_data[binlog_hton.slot];
  IO_CACHE *trans_log= &trx_data->trans_log;
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  DBUG_ASSERT(mysql_bin_log.is_open() && my_b_tell(trans_log));

  /*
    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.
  */
  if (unlikely(thd->options & OPTION_STATUS_NO_TRANS_UPDATE))
  {
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    int const error=
      thd->binlog_query(THD::STMT_QUERY_TYPE,
                        thd->query, thd->query_length, TRUE, FALSE);
    DBUG_RETURN(error);
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  }
  reinit_io_cache(trans_log, WRITE_CACHE, *(my_off_t *)sv, 0, 0);
  DBUG_RETURN(0);
}

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

  if (my_b_read(log, (byte*) magic, sizeof(magic)))
  {
    *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;
}

File open_binlog(IO_CACHE *log, const char *log_file_name, const char **errmsg)
{
  File file;
  DBUG_ENTER("open_binlog");

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  if ((file = my_open(log_file_name, O_RDONLY | O_BINARY | O_SHARE, 
                      MYF(MY_WME))) < 0)
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  {
    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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#ifdef __NT__
static int eventSource = 0;
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1304
void setup_windows_event_source()
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{
1306
  HKEY    hRegKey= NULL;
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  DWORD   dwError= 0;
  TCHAR   szPath[MAX_PATH];
  DWORD dwTypes;
1310

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  if (eventSource)               // Ensure that we are only called once
    return;
  eventSource= 1;
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  // Create the event source registry key
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  dwError= RegCreateKey(HKEY_LOCAL_MACHINE,
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                          "SYSTEM\\CurrentControlSet\\Services\\EventLog\\Application\\MySQL", 
                          &hRegKey);
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  /* Name of the PE module that contains the message resource */
  GetModuleFileName(NULL, szPath, MAX_PATH);
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  /* Register EventMessageFile */
1324
  dwError = RegSetValueEx(hRegKey, "EventMessageFile", 0, REG_EXPAND_SZ,
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                          (PBYTE) szPath, strlen(szPath)+1);
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  /* 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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1332

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  RegCloseKey(hRegKey);
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}

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#endif /* __NT__ */
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/****************************************************************************
** Find a uniq filename for 'filename.#'.
** Set # to a number as low as possible
** returns != 0 if not possible to get uniq filename
****************************************************************************/

static int find_uniq_filename(char *name)
{
1347 1348 1349 1350
  long                  number;
  uint                  i;
  char                  buff[FN_REFLEN];
  struct st_my_dir     *dir_info;
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  reg1 struct fileinfo *file_info;
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  ulong                 max_found=0;

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  DBUG_ENTER("find_uniq_filename");

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  uint  length = dirname_part(buff,name);
  char *start  = name + length;
  char *end    = strend(start);

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  *end='.';
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  length= (uint) (end-start+1);
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  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++)
  {
    if (bcmp(file_info->name,start,length) == 0 &&
	test_if_number(file_info->name+length, &number,0))
    {
      set_if_bigger(max_found,(ulong) number);
    }
  }
  my_dirend(dir_info);

  *end++='.';
1380
  sprintf(end,"%06ld",max_found+1);
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1381 1382 1383
  DBUG_RETURN(0);
}

1384

1385
MYSQL_LOG::MYSQL_LOG()
1386
  :bytes_written(0), last_time(0), query_start(0), name(0),
1387
   prepared_xids(0), log_type(LOG_CLOSED), file_id(1), open_count(1),
1388
   write_error(FALSE), inited(FALSE), need_start_event(TRUE),
1389
   m_table_map_version(0),
1390
   description_event_for_exec(0), description_event_for_queue(0)
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{
  /*
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    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
1395
    called only in main(). Doing initialization here would make it happen
1396
    before main().
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  */
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  index_file_name[0] = 0;
  bzero((char*) &log_file,sizeof(log_file));
1400
  bzero((char*) &index_file, sizeof(index_file));
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}

1403
/* this is called only once */
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1404

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1405
void MYSQL_LOG::cleanup()
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{
1407
  DBUG_ENTER("cleanup");
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  if (inited)
1409
  {
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    inited= 0;
1411
    close(LOG_CLOSE_INDEX|LOG_CLOSE_STOP_EVENT);
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    delete description_event_for_queue;
    delete description_event_for_exec;
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    (void) pthread_mutex_destroy(&LOCK_log);
    (void) pthread_mutex_destroy(&LOCK_index);
1416
    (void) pthread_cond_destroy(&update_cond);
1417
  }
1418
  DBUG_VOID_RETURN;
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}

1421

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1422
int MYSQL_LOG::generate_new_name(char *new_name, const char *log_name)
1423
{
1424 1425
  fn_format(new_name,log_name,mysql_data_home,"",4);
  if (log_type != LOG_NORMAL)
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  {
    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;
}

1439

1440
void MYSQL_LOG::init(enum_log_type log_type_arg,
1441
		     enum cache_type io_cache_type_arg,
1442 1443
		     bool no_auto_events_arg,
                     ulong max_size_arg)
1444
{
1445
  DBUG_ENTER("MYSQL_LOG::init");
1446
  log_type = log_type_arg;
1447
  io_cache_type = io_cache_type_arg;
1448
  no_auto_events = no_auto_events_arg;
1449
  max_size=max_size_arg;
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1450
  DBUG_PRINT("info",("log_type: %d max_size: %lu", log_type, max_size));
1451
  DBUG_VOID_RETURN;
1452 1453
}

1454

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1455 1456
void MYSQL_LOG::init_pthread_objects()
{
1457 1458
  DBUG_ASSERT(inited == 0);
  inited= 1;
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  (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);
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}

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const char *MYSQL_LOG::generate_name(const char *log_name,
                                     const char *suffix,
                                     bool strip_ext, char *buff)
{
  if (!log_name || !log_name[0])
  {
    /*
      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.
    */
    strmake(buff,glob_hostname,FN_REFLEN-5);
    strmov(fn_ext(buff),suffix);
    return (const char *)buff;
  }
  // get rid of extension if the log is binary to avoid problems
  if (strip_ext)
  {
    char *p = fn_ext(log_name);
    uint length=(uint) (p-log_name);
    strmake(buff,log_name,min(length,FN_REFLEN));
    return (const char*)buff;
  }
  return log_name;
}

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bool MYSQL_LOG::open_index_file(const char *index_file_name_arg,
                                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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1516
			0, MYF(MY_WME | MY_WAIT_IF_FULL)))
1517 1518 1519 1520 1521 1522 1523 1524
  {
    if (index_file_nr >= 0)
      my_close(index_file_nr,MYF(0));
    return TRUE;
  }
  return FALSE;
}

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1525

1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539
/*
  Open a (new) log file.

  DESCRIPTION
  - If binary logs, also open the index file and register the new
    file name in it
  - When calling this when the file is in use, you must have a locks
    on LOCK_log and LOCK_index.

  RETURN VALUES
    0	ok
    1	error
*/

1540 1541 1542 1543 1544
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,
                     bool no_auto_events_arg,
1545 1546
                     ulong max_size_arg,
                     bool null_created_arg)
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1547
{
1548 1549
  char buff[FN_REFLEN];
  File file= -1;
1550
  int open_flags = O_CREAT | O_BINARY;
1551
  DBUG_ENTER("MYSQL_LOG::open");
1552
  DBUG_PRINT("enter",("log_type: %d",(int) log_type_arg));
1553 1554 1555

  last_time=query_start=0;
  write_error=0;
1556

1557
  init(log_type_arg,io_cache_type_arg,no_auto_events_arg,max_size_arg);
1558

1559
  if (!(name=my_strdup(log_name,MYF(MY_WME))))
1560 1561
  {
    name= (char *)log_name; // for the error message
1562
    goto err;
1563
  }
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1564 1565 1566
  if (new_name)
    strmov(log_file_name,new_name);
  else if (generate_new_name(log_file_name, name))
1567
    goto err;
1568

1569
  if (io_cache_type == SEQ_READ_APPEND)
1570
    open_flags |= O_RDWR | O_APPEND;
1571
  else
1572
    open_flags |= O_WRONLY | (log_type == LOG_BIN ? 0 : O_APPEND);
1573

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1574
  db[0]=0;
1575
  open_count++;
1576
  if ((file=my_open(log_file_name,open_flags,
1577
		    MYF(MY_WME | ME_WAITTANG))) < 0 ||
1578
      init_io_cache(&log_file, file, IO_SIZE, io_cache_type,
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		    my_tell(file,MYF(MY_WME)), 0, 
                    MYF(MY_WME | MY_NABP |
                        ((log_type == LOG_BIN) ? MY_WAIT_IF_FULL : 0))))
1582
    goto err;
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1583

1584 1585
  switch (log_type) {
  case LOG_NORMAL:
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  {
1587
    char *end;
1588
    int len=my_snprintf(buff, sizeof(buff), "%s, Version: %s. "
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SCRUM  
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#ifdef EMBEDDED_LIBRARY
1590
		        "embedded library\n", my_progname, server_version
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#elif __NT__
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			"started with:\nTCP Port: %d, Named Pipe: %s\n",
			my_progname, server_version, mysqld_port, mysqld_unix_port
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1594
#else
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			"started with:\nTcp port: %d  Unix socket: %s\n",
			my_progname,server_version,mysqld_port,mysqld_unix_port
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#endif
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                       );
1599 1600
    end=strnmov(buff+len,"Time                 Id Command    Argument\n",
                sizeof(buff)-len);
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1601
    if (my_b_write(&log_file, (byte*) buff,(uint) (end-buff)) ||
1602 1603
	flush_io_cache(&log_file))
      goto err;
1604
    break;
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1605
  }
1606
  case LOG_NEW:
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1607
  {
1608
    uint len;
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    time_t skr=time(NULL);
    struct tm tm_tmp;
1611

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1612
    localtime_r(&skr,&tm_tmp);
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    len= my_snprintf(buff,sizeof(buff),
		     "# %s, Version: %s at %02d%02d%02d %2d:%02d:%02d\n",
		     my_progname,server_version,
		     tm_tmp.tm_year % 100,
		     tm_tmp.tm_mon+1,
		     tm_tmp.tm_mday,
		     tm_tmp.tm_hour,
		     tm_tmp.tm_min,
		     tm_tmp.tm_sec);
    if (my_b_write(&log_file, (byte*) buff, len) ||
1623 1624
	flush_io_cache(&log_file))
      goto err;
1625
    break;
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1626
  }
1627
  case LOG_BIN:
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1628
  {
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    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.
      */
1639 1640
      if (my_b_safe_write(&log_file, (byte*) BINLOG_MAGIC,
			  BIN_LOG_HEADER_SIZE))
1641
        goto err;
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      bytes_written+= BIN_LOG_HEADER_SIZE;
      write_file_name_to_index_file= 1;
1644
    }
1645

1646
    DBUG_ASSERT(my_b_inited(&index_file) != 0);
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    reinit_io_cache(&index_file, WRITE_CACHE,
                    my_b_filelength(&index_file), 0, 0);
1649
    if (need_start_event && !no_auto_events)
1650
    {
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      /*
        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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      /*
        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;
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      if (!s.is_valid())
        goto err;
      if (null_created_arg)
        s.created= 0;
      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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1681
        Format_description_log_event::Format_description_log_event(char* buf,).
1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695
        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
        Format_description_log_event::exec_event().
      */
      description_event_for_queue->created= 0;
      /* Don't set log_pos in event header */
      description_event_for_queue->artificial_event=1;
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      if (description_event_for_queue->write(&log_file))
        goto err;
      bytes_written+= description_event_for_queue->data_written;
1700
    }
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1701 1702
    if (flush_io_cache(&log_file) ||
        my_sync(log_file.file, MYF(MY_WME)))
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1703
      goto err;
1704 1705 1706

    if (write_file_name_to_index_file)
    {
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      /*
        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.
      */
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      if (my_b_write(&index_file, (byte*) log_file_name,
		     strlen(log_file_name)) ||
	  my_b_write(&index_file, (byte*) "\n", 1) ||
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1714 1715
	  flush_io_cache(&index_file) ||
          my_sync(index_file.file, MYF(MY_WME)))
1716
	goto err;
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1717
    }
1718
    break;
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1719
  }
1720
  case LOG_CLOSED:				// Impossible
1721
  case LOG_TO_BE_OPENED:
1722 1723 1724 1725
    DBUG_ASSERT(1);
    break;
  }
  DBUG_RETURN(0);
1726 1727

err:
1728 1729 1730
  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, \
1731
shutdown the MySQL server and restart it.", name, errno);
1732 1733 1734
  if (file >= 0)
    my_close(file,MYF(0));
  end_io_cache(&log_file);
1735 1736
  end_io_cache(&index_file);
  safeFree(name);
1737
  log_type= LOG_CLOSED;
1738
  DBUG_RETURN(1);
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1739 1740
}

1741

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1742 1743 1744
int MYSQL_LOG::get_current_log(LOG_INFO* linfo)
{
  pthread_mutex_lock(&LOCK_log);
1745 1746
  strmake(linfo->log_file_name, log_file_name, sizeof(linfo->log_file_name)-1);
  linfo->pos = my_b_tell(&log_file);
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  pthread_mutex_unlock(&LOCK_log);
  return 0;
}

1751

1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793
/*
  Move all data up in a file in an filename index file

  SYNOPSIS
    copy_up_file_and_fill()
    index_file			File to move
    offset			Move everything from here to beginning

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

  IMPLEMENTATION
    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.

  RETURN VALUES
    0	ok
*/

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;
  byte io_buf[IO_SIZE*2];
  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));
    if (my_write(file, (byte*) io_buf, bytes_read, MYF(MY_WME | MY_NABP)))
      goto err;
  }
  /* The following will either truncate the file or fill the end with \n' */
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  if (my_chsize(file, offset - init_offset, '\n', MYF(MY_WME)) ||
      my_sync(file, MYF(MY_WME)))
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    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);
}


/*
  Find the position in the log-index-file for the given log name

  SYNOPSIS
    find_log_pos()
    linfo		Store here the found log file name and position to
			the NEXT log file name in the index file.
    log_name		Filename to find in the index file.
			Is a null pointer if we want to read the first entry
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    need_lock		Set this to 1 if the parent doesn't already have a
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			lock on LOCK_index

  NOTE
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    On systems without the truncate function the file will end with one or
    more empty lines.  These will be ignored when reading the file.
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  RETURN VALUES
    0			ok
    LOG_INFO_EOF	End of log-index-file found
    LOG_INFO_IO		Got IO error while reading file
*/

int MYSQL_LOG::find_log_pos(LOG_INFO *linfo, const char *log_name,
			    bool need_lock)
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{
1832 1833 1834 1835 1836
  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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1838
  /*
1839 1840
    Mutex needed because we need to make sure the file pointer does not
    move from under our feet
1841
  */
1842
  if (need_lock)
1843
    pthread_mutex_lock(&LOCK_index);
1844 1845 1846 1847 1848
  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);

1849
  for (;;)
1850
  {
1851
    uint length;
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    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)
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    {
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      /* Did not find the given entry; Return not found or error */
      error= !index_file.error ? LOG_INFO_EOF : LOG_INFO_IO;
      break;
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    }

1862 1863
    // if the log entry matches, null string matching anything
    if (!log_name ||
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	(log_name_len == length-1 && fname[log_name_len] == '\n' &&
1865
	 !memcmp(fname, log_name, log_name_len)))
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    {
1867
      DBUG_PRINT("info",("Found log file entry"));
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      fname[length-1]=0;			// remove last \n
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      linfo->index_file_start_offset= offset;
      linfo->index_file_offset = my_b_tell(&index_file);
1871
      break;
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    }
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  }
1874

1875
  if (need_lock)
1876
    pthread_mutex_unlock(&LOCK_index);
1877
  DBUG_RETURN(error);
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}
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1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902
/*
  Find the position in the log-index-file for the given log name

  SYNOPSIS
    find_next_log()
    linfo		Store here the next log file name and position to
			the file name after that.
    need_lock		Set this to 1 if the parent doesn't already have a
			lock on LOCK_index

  NOTE
    - Before calling this function, one has to call find_log_pos()
      to set up 'linfo'
    - Mutex needed because we need to make sure the file pointer does not move
      from under our feet

  RETURN VALUES
    0			ok
    LOG_INFO_EOF	End of log-index-file found
    LOG_INFO_IO		Got IO error while reading file
*/

1903
int MYSQL_LOG::find_next_log(LOG_INFO* linfo, bool need_lock)
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{
1905
  int error= 0;
1906
  uint length;
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  char *fname= linfo->log_file_name;

1909 1910
  if (need_lock)
    pthread_mutex_lock(&LOCK_index);
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  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)
1919
  {
1920
    error = !index_file.error ? LOG_INFO_EOF : LOG_INFO_IO;
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    goto err;
  }
1923
  fname[length-1]=0;				// kill \n
1924
  linfo->index_file_offset = my_b_tell(&index_file);
1925

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err:
1927 1928
  if (need_lock)
    pthread_mutex_unlock(&LOCK_index);
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  return error;
}

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1932

1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951
/*
  Delete all logs refered to in the index file
  Start writing to a new log file.  The new index file will only contain
  this file.

  SYNOPSIS
     reset_logs()
     thd		Thread

  NOTE
    If not called from slave thread, write start event to new log


  RETURN VALUES
    0	ok
    1   error
*/

bool MYSQL_LOG::reset_logs(THD* thd)
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{
  LOG_INFO linfo;
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  bool error=0;
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  const char* save_name;
  enum_log_type save_log_type;
1957
  DBUG_ENTER("reset_logs");
1958

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  ha_reset_logs(thd);
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  /*
    We need to get both locks to be sure that no one is trying to
    write to the index log file.
  */
1964
  pthread_mutex_lock(&LOCK_log);
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  pthread_mutex_lock(&LOCK_index);
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1967 1968 1969 1970 1971 1972 1973
  /*
    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.
  */
  (void) pthread_mutex_lock(&LOCK_thread_count);
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  /* Save variables so that we can reopen the log */
  save_name=name;
  name=0;					// Protect against free
  save_log_type=log_type;
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  close(LOG_CLOSE_TO_BE_OPENED);
1980 1981 1982 1983

  /* First delete all old log files */

  if (find_log_pos(&linfo, NullS, 0))
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  {
    error=1;
    goto err;
  }
1988

1989
  for (;;)
1990 1991
  {
    my_delete(linfo.log_file_name, MYF(MY_WME));
1992
    if (find_next_log(&linfo, 0))
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      break;
  }
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  /* Start logging with a new file */
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  close(LOG_CLOSE_INDEX);
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  my_delete(index_file_name, MYF(MY_WME));	// Reset (open will update)
  if (!thd->slave_thread)
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    need_start_event=1;
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  if (!open_index_file(index_file_name, 0))
    open(save_name, save_log_type, 0,
         io_cache_type, no_auto_events, max_size, 0);
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  my_free((gptr) save_name, MYF(0));
2005

2006
err:
2007
  (void) pthread_mutex_unlock(&LOCK_thread_count);
2008
  pthread_mutex_unlock(&LOCK_index);
2009
  pthread_mutex_unlock(&LOCK_log);
2010
  DBUG_RETURN(error);
2011 2012
}

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2013

2014
/*
2015 2016 2017
  Delete relay log files prior to rli->group_relay_log_name
  (i.e. all logs which are not involved in a non-finished group
  (transaction)), remove them from the index file and start on next relay log.
2018 2019 2020

  SYNOPSIS
    purge_first_log()
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    rli		 Relay log information
    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).
2026

2027 2028
  NOTE
    - This is only called from the slave-execute thread when it has read
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      all commands from a relay log and want to switch to a new relay log.
    - When this happens, we can be in an active transaction as
      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).
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  IMPLEMENTATION
    - Protects index file with LOCK_index
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    - Delete relevant relay log files
    - Copy all file names after these ones to the front of the index file
2039
    - If the OS has truncate, truncate the file, else fill it with \n'
2040
    - Read the next file name from the index file and store in rli->linfo
2041 2042

  RETURN VALUES
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    0			ok
    LOG_INFO_EOF	End of log-index-file found
    LOG_INFO_SEEK	Could not allocate IO cache
    LOG_INFO_IO		Got IO error while reading file
2047 2048
*/

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#ifdef HAVE_REPLICATION
2050

2051
int MYSQL_LOG::purge_first_log(struct st_relay_log_info* rli, bool included) 
2052
{
2053
  int error;
2054 2055
  DBUG_ENTER("purge_first_log");

2056 2057
  DBUG_ASSERT(is_open());
  DBUG_ASSERT(rli->slave_running == 1);
2058
  DBUG_ASSERT(!strcmp(rli->linfo.log_file_name,rli->event_relay_log_name));
2059

2060
  pthread_mutex_lock(&LOCK_index);
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  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);
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2067 2068

  /*
2069 2070 2071
    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
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  */
2073 2074 2075 2076 2077
  pthread_cond_broadcast(&rli->log_space_cond);
  
  /*
    Read the next log file name from the index file and pass it back to
    the caller
2078 2079
    If included is true, we want the first relay log;
    otherwise we want the one after event_relay_log_name.
2080
  */
2081 2082 2083 2084
  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)))))
2085 2086
  {
    char buff[22];
2087 2088 2089 2090 2091
    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);
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    goto err;
  }
2094

2095
  /*
2096
    Reset rli's coordinates to the current log.
2097
  */
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  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);
2112
    rli->notify_group_relay_log_name_update();
2113
  }
2114 2115 2116

  /* Store where we are in the new file for the execution thread */
  flush_relay_log_info(rli);
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2117

2118
err:
2119
  pthread_mutex_unlock(&LOCK_index);
2120
  DBUG_RETURN(error);
2121 2122
}

2123 2124 2125 2126
/*
  Update log index_file
*/

2127
int MYSQL_LOG::update_log_index(LOG_INFO* log_info, bool need_update_threads)
2128 2129 2130 2131 2132
{
  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
2133 2134
  if (need_update_threads)
    adjust_linfo_offsets(log_info->index_file_start_offset);
2135 2136
  return 0;
}
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2138 2139 2140 2141 2142
/*
  Remove all logs before the given log from disk and from the index file.

  SYNOPSIS
    purge_logs()
2143 2144 2145 2146 2147 2148 2149
    to_log	        Delete all log file name before this file. 
    included            If true, to_log is deleted too.
    need_mutex
    need_update_threads If we want to update the log coordinates of
                        all threads. False for relay logs, true otherwise.
    freed_log_space     If not null, decrement this variable of
                        the amount of log space freed
2150 2151 2152 2153 2154 2155 2156 2157 2158 2159

  NOTES
    If any of the logs before the deleted one is in use,
    only purge logs up to this one.

  RETURN VALUES
    0				ok
    LOG_INFO_EOF		to_log not found
*/

2160 2161 2162 2163 2164
int MYSQL_LOG::purge_logs(const char *to_log, 
                          bool included,
                          bool need_mutex, 
                          bool need_update_threads, 
                          ulonglong *decrease_log_space)
2165 2166
{
  int error;
2167
  bool exit_loop= 0;
2168 2169
  LOG_INFO log_info;
  DBUG_ENTER("purge_logs");
2170
  DBUG_PRINT("info",("to_log= %s",to_log));
2171

2172 2173
  if (need_mutex)
    pthread_mutex_lock(&LOCK_index);
2174
  if ((error=find_log_pos(&log_info, to_log, 0 /*no mutex*/)))
2175 2176
    goto err;

2177
  /*
2178
    File name exists in index file; delete until we find this file
2179 2180 2181
    or a file that is used.
  */
  if ((error=find_log_pos(&log_info, NullS, 0 /*no mutex*/)))
2182
    goto err;
2183 2184
  while ((strcmp(to_log,log_info.log_file_name) || (exit_loop=included)) &&
         !log_in_use(log_info.log_file_name))
2185
  {
2186
    ulong file_size= 0;
2187 2188 2189
    if (decrease_log_space) //stat the file we want to delete
    {
      MY_STAT s;
2190 2191 2192 2193 2194 2195

      /* 
         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.
      */
2196
      if (my_stat(log_info.log_file_name,&s,MYF(0)))
2197
        file_size= s.st_size;
2198
      else
2199 2200
	sql_print_information("Failed to execute my_stat on file '%s'",
			      log_info.log_file_name);
2201 2202 2203 2204 2205 2206 2207
    }
    /*
      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)
2208
      *decrease_log_space-= file_size;
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    ha_binlog_index_purge_file(current_thd, log_info.log_file_name);

2212
    if (find_next_log(&log_info, 0) || exit_loop)
2213
      break;
2214
  }
2215

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2216 2217 2218 2219
  /*
    If we get killed -9 here, the sysadmin would have to edit
    the log index file after restart - otherwise, this should be safe
  */
2220
  error= update_log_index(&log_info, need_update_threads);
2221

2222
err:
2223 2224
  if (need_mutex)
    pthread_mutex_unlock(&LOCK_index);
2225
  DBUG_RETURN(error);
2226 2227
}

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/*
  Remove all logs before the given file date from disk and from the
  index file.

  SYNOPSIS
    purge_logs_before_date()
    thd		Thread pointer
    before_date	Delete all log files before given date.

  NOTES
    If any of the logs before the deleted one is in use,
    only purge logs up to this one.

  RETURN VALUES
    0				ok
    LOG_INFO_PURGE_NO_ROTATE	Binary file that can't be rotated
*/

2246
int MYSQL_LOG::purge_logs_before_date(time_t purge_time)
2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261
{
  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*/)))
2262
    goto err;
2263 2264 2265 2266 2267

  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 */
2268 2269
    if (!my_stat(log_info.log_file_name, &stat_area, MYF(0)) ||
	stat_area.st_mtime >= purge_time)
2270
      break;
2271
    my_delete(log_info.log_file_name, MYF(0));
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2272 2273 2274

    ha_binlog_index_purge_file(current_thd, log_info.log_file_name);

2275 2276
    if (find_next_log(&log_info, 0))
      break;
2277
  }
2278

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  /*
    If we get killed -9 here, the sysadmin would have to edit
    the log index file after restart - otherwise, this should be safe
  */
2283
  error= update_log_index(&log_info, 1);
2284

2285 2286
err:
  pthread_mutex_unlock(&LOCK_index);
2287
  DBUG_RETURN(error);
2288 2289
}

2290

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2291
#endif /* HAVE_REPLICATION */
2292

2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304

/*
  Create a new log file name

  SYNOPSIS
    make_log_name()
    buf			buf of at least FN_REFLEN where new name is stored

  NOTE
    If file name will be longer then FN_REFLEN it will be truncated
*/

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2305 2306
void MYSQL_LOG::make_log_name(char* buf, const char* log_ident)
{
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2307 2308 2309 2310 2311
  uint dir_len = dirname_length(log_file_name); 
  if (dir_len > FN_REFLEN)
    dir_len=FN_REFLEN-1;
  strnmov(buf, log_file_name, dir_len);
  strmake(buf+dir_len, log_ident, FN_REFLEN - dir_len);
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2312 2313
}

2314 2315 2316 2317 2318 2319

/*
  Check if we are writing/reading to the given log file
*/

bool MYSQL_LOG::is_active(const char *log_file_name_arg)
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{
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2321
  return !strcmp(log_file_name, log_file_name_arg);
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}

2324 2325 2326 2327 2328 2329

/*
  Start writing to a new log file or reopen the old file

  SYNOPSIS
    new_file()
2330
    need_lock		Set to 1 if caller has not locked LOCK_log
2331 2332 2333 2334 2335 2336

  NOTE
    The new file name is stored last in the index file
*/

void MYSQL_LOG::new_file(bool need_lock)
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2337
{
2338 2339 2340
  char new_name[FN_REFLEN], *new_name_ptr, *old_name;
  enum_log_type save_log_type;

2341
  DBUG_ENTER("MYSQL_LOG::new_file");
2342
  if (!is_open())
2343 2344 2345 2346
  {
    DBUG_PRINT("info",("log is closed"));
    DBUG_VOID_RETURN;
  }
2347 2348 2349

  if (need_lock)
    pthread_mutex_lock(&LOCK_log);
2350 2351
  pthread_mutex_lock(&LOCK_index);

2352 2353 2354
  safe_mutex_assert_owner(&LOCK_log);
  safe_mutex_assert_owner(&LOCK_index);

2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372
  /*
    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);
    while (prepared_xids)
      pthread_cond_wait(&COND_prep_xids, &LOCK_prep_xids);
    pthread_mutex_unlock(&LOCK_prep_xids);
  }

2373
  /* Reuse old name if not binlog and not update log */
2374
  new_name_ptr= name;
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2375

2376
  /*
2377 2378 2379
    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.
2380
  */
2381 2382 2383
  if (generate_new_name(new_name, name))
    goto end;
  new_name_ptr=new_name;
2384

2385
  if (log_type == LOG_BIN)
2386
  {
2387
    if (!no_auto_events)
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2388
    {
2389
      /*
2390 2391
        We log the whole file name for log file as the user may decide
        to change base names at some point.
2392
      */
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2393
      THD *thd = current_thd; /* may be 0 if we are reacting to SIGHUP */
2394
      Rotate_log_event r(new_name+dirname_length(new_name),
2395
                         0, LOG_EVENT_OFFSET, 0);
2396
      r.write(&log_file);
2397
      bytes_written += r.data_written;
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2398
    }
2399 2400 2401 2402 2403
    /*
      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.
    */
2404
    signal_update();
2405 2406 2407 2408
  }
  old_name=name;
  save_log_type=log_type;
  name=0;				// Don't free name
2409
  close(LOG_CLOSE_TO_BE_OPENED);
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2410

2411
  /*
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2412
     Note that at this point, log_type != LOG_CLOSED (important for is_open()).
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2413
  */
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2414

2415
  /*
2416
     new_file() is only used for rotation (in FLUSH LOGS or because size >
2417
     max_binlog_size or max_relay_log_size).
2418 2419 2420 2421
     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.
2422
  */
2423

2424 2425
  open(old_name, save_log_type, new_name_ptr,
       io_cache_type, no_auto_events, max_size, 1);
2426 2427
  my_free(old_name,MYF(0));

2428
end:
2429 2430
  if (need_lock)
    pthread_mutex_unlock(&LOCK_log);
2431 2432
  pthread_mutex_unlock(&LOCK_index);

2433
  DBUG_VOID_RETURN;
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2434 2435
}

2436

2437 2438 2439 2440
bool MYSQL_LOG::append(Log_event* ev)
{
  bool error = 0;
  pthread_mutex_lock(&LOCK_log);
2441 2442
  DBUG_ENTER("MYSQL_LOG::append");

2443
  DBUG_ASSERT(log_file.type == SEQ_READ_APPEND);
2444 2445 2446 2447
  /*
    Log_event::write() is smart enough to use my_b_write() or
    my_b_append() depending on the kind of cache we have.
  */
2448 2449 2450 2451 2452
  if (ev->write(&log_file))
  {
    error=1;
    goto err;
  }
2453
  bytes_written+= ev->data_written;
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2454
  DBUG_PRINT("info",("max_size: %lu",max_size));
2455
  if ((uint) my_b_append_tell(&log_file) > max_size)
2456
    new_file(0);
2457

2458
err:
2459
  pthread_mutex_unlock(&LOCK_log);
2460
  signal_update();				// Safe as we don't call close
2461
  DBUG_RETURN(error);
2462 2463
}

2464

2465 2466
bool MYSQL_LOG::appendv(const char* buf, uint len,...)
{
2467
  bool error= 0;
2468
  DBUG_ENTER("MYSQL_LOG::appendv");
2469 2470
  va_list(args);
  va_start(args,len);
2471

2472
  DBUG_ASSERT(log_file.type == SEQ_READ_APPEND);
2473

2474
  safe_mutex_assert_owner(&LOCK_log);
2475 2476
  do
  {
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2477
    if (my_b_append(&log_file,(byte*) buf,len))
2478
    {
2479 2480
      error= 1;
      goto err;
2481
    }
2482
    bytes_written += len;
2483
  } while ((buf=va_arg(args,const char*)) && (len=va_arg(args,uint)));
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2484
  DBUG_PRINT("info",("max_size: %lu",max_size));
2485
  if ((uint) my_b_append_tell(&log_file) > max_size)
2486 2487 2488
    new_file(0);

err:
2489 2490
  if (!error)
    signal_update();
2491
  DBUG_RETURN(error);
2492
}
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2493

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2494

2495
/*
2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517
  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
2518 2519
*/

2520 2521 2522 2523
bool MYSQL_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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2524
{
2525 2526 2527 2528 2529 2530 2531 2532
  char buff[32];
  uint length= 0;
  char time_buff[MAX_TIME_SIZE];
  struct tm start;
  uint time_buff_len= 0;

  /* Test if someone closed between the is_open test and lock */
  if (is_open())
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2533
  {
2534 2535 2536 2537
    /* Note that my_b_write() assumes it knows the length for this */
      if (event_time != last_time)
      {
        last_time= event_time;
2538

2539 2540 2541 2542 2543 2544 2545 2546 2547 2548
        localtime_r(&event_time, &start);

        time_buff_len= my_snprintf(time_buff, MAX_TIME_SIZE,
                                   "%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);

        if (my_b_write(&log_file, (byte*) &time_buff, time_buff_len))
          goto err;
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2549 2550
      }
      else
2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572
        if (my_b_write(&log_file, (byte*) "\t\t" ,2) < 0)
          goto err;

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

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

    if (my_b_write(&log_file, (byte*) command_type, command_type_len))
      goto err;

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

    /* sql_text */
    if (my_b_write(&log_file, (byte*) sql_text, sql_text_len))
      goto err;

    if (my_b_write(&log_file, (byte*) "\n", 1) ||
        flush_io_cache(&log_file))
      goto err;
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2573
  }
2574 2575 2576 2577 2578 2579 2580 2581 2582 2583

  return FALSE;
err:

  if (!write_error)
  {
    write_error= 1;
    sql_print_error(ER(ER_ERROR_ON_WRITE), name, errno);
  }
  return TRUE;
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2584 2585
}

2586

2587
bool MYSQL_LOG::flush_and_sync()
2588
{
2589 2590 2591 2592 2593
  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)
2594 2595
  {
    sync_binlog_counter= 0;
2596
    err=my_sync(fd, MYF(MY_WME));
2597
  }
2598
  return err;
2599 2600
}

2601 2602 2603 2604 2605 2606
void MYSQL_LOG::start_union_events(THD *thd)
{
  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;
2607
  thd->binlog_evt_union.first_query_id= thd->query_id;
2608 2609 2610 2611 2612 2613 2614 2615
}

void MYSQL_LOG::stop_union_events(THD *thd)
{
  DBUG_ASSERT(thd->binlog_evt_union.do_union);
  thd->binlog_evt_union.do_union= FALSE;
}

2616 2617 2618 2619 2620 2621
bool MYSQL_LOG::is_query_in_union(THD *thd, query_id_t query_id_param)
{
  return (thd->binlog_evt_union.do_union && 
          query_id_param >= thd->binlog_evt_union.first_query_id);
}

2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650

/*
  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=
    (binlog_trx_data*) ha_data[binlog_hton.slot];

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

  ha_data[binlog_hton.slot]= trx_data=
    (binlog_trx_data*) my_malloc(sizeof(binlog_trx_data), MYF(MY_ZEROFILL));
  if (!trx_data ||
      open_cached_file(&trx_data->trans_log, mysql_tmpdir,
                       LOG_PREFIX, binlog_cache_size, MYF(MY_WME)))
  {
    my_free((gptr)trx_data, MYF(MY_ALLOW_ZERO_PTR));
    ha_data[binlog_hton.slot]= 0;
    DBUG_RETURN(1);                      // Didn't manage to set it up
  }
  trx_data->trans_log.end_of_file= max_binlog_cache_size;
  DBUG_RETURN(0);
}

2651 2652 2653 2654 2655 2656 2657
/*
  Write a table map to the binary log.

  This function is called from ha_external_lock() after the storage
  engine has registered for the transaction.
 */

2658 2659
int THD::binlog_write_table_map(TABLE *table, bool is_trans)
{
2660
  int error;
2661
  DBUG_ENTER("THD::binlog_write_table_map");
2662
  DBUG_PRINT("enter", ("table: %p  (%s: #%u)",
2663 2664 2665
                       table, table->s->table_name, table->s->table_map_id));

  /* Pre-conditions */
2666
  DBUG_ASSERT(current_stmt_binlog_row_based && mysql_bin_log.is_open());
2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678
  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);

  if (is_trans)
    trans_register_ha(this, options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN),
                      &binlog_hton);

2679
  if ((error= mysql_bin_log.write(&the_event)))
2680 2681
    DBUG_RETURN(error);

2682
  binlog_table_maps++;
2683 2684 2685 2686
  table->s->table_map_version= mysql_bin_log.table_map_version();
  DBUG_RETURN(0);
}

2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703
Rows_log_event*
THD::binlog_get_pending_rows_event() const
{
  binlog_trx_data *const trx_data=
    (binlog_trx_data*) ha_data[binlog_hton.slot];
  /*
    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.
   */
  return trx_data ? trx_data->pending : NULL;
}

void
THD::binlog_set_pending_rows_event(Rows_log_event* ev)
{
2704 2705 2706
  if (ha_data[binlog_hton.slot] == NULL)
    binlog_setup_trx_data();

2707 2708
  binlog_trx_data *const trx_data=
    (binlog_trx_data*) ha_data[binlog_hton.slot];
2709

2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722
  DBUG_ASSERT(trx_data);
  trx_data->pending= ev;
}


/*
  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.
*/
int MYSQL_LOG::flush_and_set_pending_rows_event(THD *thd, Rows_log_event* event)
{
  DBUG_ENTER("MYSQL_LOG::flush_and_set_pending_rows_event(event)");
2723
  DBUG_ASSERT(thd->current_stmt_binlog_row_based && mysql_bin_log.is_open());
2724 2725 2726 2727 2728 2729 2730 2731 2732
  DBUG_PRINT("enter", ("event=%p", event));

  int error= 0;

  binlog_trx_data *const trx_data=
    (binlog_trx_data*) thd->ha_data[binlog_hton.slot];

  DBUG_ASSERT(trx_data);

2733 2734
  DBUG_PRINT("info", ("trx_data->pending=%p", trx_data->pending));

2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795
  if (Rows_log_event* pending= trx_data->pending)
  {
    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);
  }

2796
  thd->binlog_set_pending_rows_event(event);
2797 2798 2799 2800

  DBUG_RETURN(error);
}

2801 2802 2803 2804
/*
  Write an event to the binary log
*/

2805
bool MYSQL_LOG::write(Log_event *event_info)
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2806
{
2807 2808 2809 2810
  THD *thd= event_info->thd;
  bool error= 1;
  DBUG_ENTER("MYSQL_LOG::write(Log_event *)");

2811 2812
  if (thd->binlog_evt_union.do_union)
  {
2813 2814 2815 2816
    /*
      In Stored function; Remember that function call caused an update.
      We will log the function call to the binary log on function exit
    */
2817 2818 2819 2820
    thd->binlog_evt_union.unioned_events= TRUE;
    thd->binlog_evt_union.unioned_events_trans |= event_info->cache_stmt;
    DBUG_RETURN(0);
  }
2821 2822 2823 2824 2825 2826 2827

  /*
    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.

2828 2829 2830
    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.
2831
  */
2832 2833 2834
  bool const end_stmt=
    thd->prelocked_mode && thd->lex->requires_prelocking();
  thd->binlog_flush_pending_rows_event(end_stmt);
2835

2836 2837
  pthread_mutex_lock(&LOCK_log);

2838
  /*
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2839 2840 2841 2842
     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.
  */
2843
  if (likely(is_open()))
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2844
  {
2845 2846
    const char *local_db= event_info->get_db();
    IO_CACHE *file= &log_file;
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SCRUM  
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2847
#ifdef HAVE_REPLICATION
2848
    /*
2849 2850 2851 2852
       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)"
    */
2853
    if ((thd && !(thd->options & OPTION_BIN_LOG)) ||
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Merge  
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2854
	(!binlog_filter->db_ok(local_db)))
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2855
    {
2856
      VOID(pthread_mutex_unlock(&LOCK_log));
2857 2858 2859
      DBUG_PRINT("info",("OPTION_BIN_LOG is %s, db_ok('%s') == %d",
                         (thd->options & OPTION_BIN_LOG) ? "set" : "clear",
                         local_db, binlog_filter->db_ok(local_db)));
2860
      DBUG_RETURN(0);
2861
    }
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SCRUM  
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2862
#endif /* HAVE_REPLICATION */
2863

2864 2865 2866 2867 2868 2869 2870 2871
#ifdef USING_TRANSACTIONS
    /*
      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)
2872
      - or if the event asks for it (cache_stmt == TRUE).
2873 2874 2875
    */
    if (opt_using_transactions && thd)
    {
2876 2877
      if (thd->binlog_setup_trx_data())
        goto err;
2878

2879 2880 2881
      binlog_trx_data *const trx_data=
        (binlog_trx_data*) thd->ha_data[binlog_hton.slot];
      IO_CACHE *trans_log= &trx_data->trans_log;
2882
      bool trans_log_in_use= my_b_tell(trans_log) != 0;
2883

2884
      if (event_info->get_cache_stmt() && !trans_log_in_use)
2885
        trans_register_ha(thd,
2886 2887
                          (thd->options &
                           (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)),
2888
                          &binlog_hton);
2889 2890 2891
      if (event_info->get_cache_stmt() || trans_log_in_use)
      {
        DBUG_PRINT("info", ("Using trans_log"));
2892
        file= trans_log;
2893
      }
2894
      /*
2895
        TODO as Mats suggested, for all the cases above where we write to
2896 2897
        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
2898
        LOCK_log.
2899
      */
2900 2901
    }
#endif
2902
    DBUG_PRINT("info",("event type: %d",event_info->get_type_code()));
2903

2904 2905 2906 2907
    /*
      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
2908 2909

    /*
2910 2911
      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
2912 2913
    */

2914 2915 2916 2917
    /*
      If row-based binlogging, Insert_id, Rand and other kind of "setting
      context" events are not needed.
    */
2918
    if (thd)
2919
    {
2920
      if (!thd->current_stmt_binlog_row_based)
2921
      {
2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956
        if (thd->last_insert_id_used)
        {
          Intvar_log_event e(thd,(uchar) LAST_INSERT_ID_EVENT,
                             thd->current_insert_id);
          if (e.write(file))
            goto err;
        }
        if (thd->insert_id_used)
        {
          Intvar_log_event e(thd,(uchar) INSERT_ID_EVENT,thd->last_insert_id);
          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;
            get_dynamic(&thd->user_var_events,(gptr) &user_var_event, i);
            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;
          }
        }
2957
      }
2958
    }
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2959

2960 2961
    /*
       Write the SQL command
2962
     */
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2963

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
2964
    if (event_info->write(file))
2965
      goto err;
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2966

2967
    if (file == &log_file) // we are writing to the real log (disk)
2968
    {
2969
      if (flush_and_sync())
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
2970
	goto err;
2971 2972
      signal_update();
      rotate_and_purge(RP_LOCK_LOG_IS_ALREADY_LOCKED);
2973
    }
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
2974
    error=0;
2975

2976 2977 2978 2979
err:
    if (error)
    {
      if (my_errno == EFBIG)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2980
	my_message(ER_TRANS_CACHE_FULL, ER(ER_TRANS_CACHE_FULL), MYF(0));
2981 2982 2983 2984 2985
      else
	my_error(ER_ERROR_ON_WRITE, MYF(0), name, errno);
      write_error=1;
    }
  }
2986

2987 2988 2989
  if (event_info->flags & LOG_EVENT_UPDATE_TABLE_MAP_VERSION_F)
    ++m_table_map_version;

2990
  pthread_mutex_unlock(&LOCK_log);
2991
  DBUG_RETURN(error);
2992 2993
}

2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021

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,
                    time_t query_start_arg)
{
  return logger.slow_log_print(thd, query, query_length, query_start_arg);
}


bool general_log_print(THD *thd, enum enum_server_command command,
                       const char *format, ...)
{
  va_list args;
  uint error= 0;

  va_start(args, format);
  error= logger.general_log_print(thd, command, format, args);
  va_end(args);

  return error;
}

3022 3023
void MYSQL_LOG::rotate_and_purge(uint flags)
{
3024 3025
  if (!(flags & RP_LOCK_LOG_IS_ALREADY_LOCKED))
    pthread_mutex_lock(&LOCK_log);
3026 3027
  if ((flags & RP_FORCE_ROTATE) ||
      (my_b_tell(&log_file) >= (my_off_t) max_size))
3028
  {
3029
    new_file(0);
3030 3031 3032 3033 3034 3035 3036 3037 3038
#ifdef HAVE_REPLICATION
    if (expire_logs_days)
    {
      long purge_time= time(0) - expire_logs_days*24*60*60;
      if (purge_time >= 0)
        purge_logs_before_date(purge_time);
    }
#endif
  }
3039 3040
  if (!(flags & RP_LOCK_LOG_IS_ALREADY_LOCKED))
    pthread_mutex_unlock(&LOCK_log);
3041
}
3042

3043 3044 3045 3046 3047 3048 3049 3050 3051
uint MYSQL_LOG::next_file_id()
{
  uint res;
  pthread_mutex_lock(&LOCK_log);
  res = file_id++;
  pthread_mutex_unlock(&LOCK_log);
  return res;
}

3052

3053 3054
/*
  Write a cached log entry to the binary log
3055

guilhem@mysql.com's avatar
guilhem@mysql.com committed
3056 3057
  SYNOPSIS
    write()
3058
    thd
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3059 3060
    cache		The cache to copy to the binlog

3061 3062
  NOTE
    - We only come here if there is something in the cache.
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3063
    - The thing in the cache is always a complete transaction
3064 3065 3066 3067
    - 'cache' needs to be reinitialized after this functions returns.

  IMPLEMENTATION
    - To support transaction over replication, we wrap the transaction
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3068
      with BEGIN/COMMIT or BEGIN/ROLLBACK in the binary log.
3069 3070 3071
      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.
3072 3073
*/

3074
bool MYSQL_LOG::write(THD *thd, IO_CACHE *cache, Log_event *commit_event)
3075
{
3076
  DBUG_ENTER("MYSQL_LOG::write(THD *, IO_CACHE *, Log_event *)");
3077
  VOID(pthread_mutex_lock(&LOCK_log));
3078

3079
  if (likely(is_open()))                       // Should always be true
3080
  {
3081 3082
    uint length;

3083
    /*
3084 3085
      Log "BEGIN" at the beginning of the transaction.
      which may contain more than 1 SQL statement.
3086
    */
3087
    if (thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))
3088
    {
3089
      Query_log_event qinfo(thd, STRING_WITH_LEN("BEGIN"), TRUE, FALSE);
3090 3091 3092 3093
      /*
        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
3094 3095 3096
        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.
3097 3098 3099
        This is safer than thd->clear_error() against kills at shutdown.
      */
      qinfo.error_code= 0;
3100 3101 3102
      /*
        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
3103 3104 3105
	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.
3106
      */
3107 3108 3109
      if (qinfo.write(&log_file))
	goto err;
    }
3110
    /* Read from the file used to cache the queries .*/
3111
    if (reinit_io_cache(cache, READ_CACHE, 0, 0, 0))
3112
      goto err;
3113
    length=my_b_bytes_in_cache(cache);
3114
    DBUG_EXECUTE_IF("half_binlogged_transaction", length-=100;);
3115
    do
3116
    {
3117
      /* Write data to the binary log file */
monty@bitch.mysql.fi's avatar
monty@bitch.mysql.fi committed
3118
      if (my_b_write(&log_file, cache->read_pos, length))
3119
	goto err;
monty@bitch.mysql.fi's avatar
monty@bitch.mysql.fi committed
3120
      cache->read_pos=cache->read_end;		// Mark buffer used up
3121
      DBUG_EXECUTE_IF("half_binlogged_transaction", goto DBUG_skip_commit;);
3122
    } while ((length=my_b_fill(cache)));
3123

3124 3125
    if (commit_event->write(&log_file))
      goto err;
3126
#ifndef DBUG_OFF
3127
DBUG_skip_commit:
3128
#endif
3129
    if (flush_and_sync())
3130
      goto err;
3131
    DBUG_EXECUTE_IF("half_binlogged_transaction", abort(););
3132 3133
    if (cache->error)				// Error on read
    {
3134
      sql_print_error(ER(ER_ERROR_ON_READ), cache->file_name, errno);
3135
      write_error=1;				// Don't give more errors
3136
      goto err;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3137
    }
3138
    signal_update();
3139 3140 3141 3142 3143 3144 3145 3146 3147
    /*
      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.
    */
    if (commit_event->get_type_code() == XID_EVENT)
3148 3149 3150 3151 3152
    {
      pthread_mutex_lock(&LOCK_prep_xids);
      prepared_xids++;
      pthread_mutex_unlock(&LOCK_prep_xids);
    }
3153 3154
    else
      rotate_and_purge(RP_LOCK_LOG_IS_ALREADY_LOCKED);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3155
  }
3156
  VOID(pthread_mutex_unlock(&LOCK_log));
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3157

3158
  DBUG_RETURN(0);
3159 3160

err:
3161 3162 3163 3164 3165
  if (!write_error)
  {
    write_error= 1;
    sql_print_error(ER(ER_ERROR_ON_WRITE), name, errno);
  }
3166
  VOID(pthread_mutex_unlock(&LOCK_log));
3167
  DBUG_RETURN(1);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3168 3169
}

3170

3171
/*
3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197
  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
    query_time        Amount of time the query took to execute (in seconds)
    lock_time         Amount of time the query was locked (in seconds)
    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
3198
*/
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3199

3200 3201 3202 3203
bool MYSQL_LOG::write(THD *thd, time_t current_time, time_t query_start_arg,
                      const char *user_host, uint user_host_len,
                      longlong query_time, longlong lock_time, bool is_command,
                      const char *sql_text, uint sql_text_len)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3204
{
3205
  bool error= 0;
monty@mysql.com's avatar
monty@mysql.com committed
3206 3207
  DBUG_ENTER("MYSQL_LOG::write");

3208 3209 3210
  if (!is_open())
    DBUG_RETURN(0);

3211
  if (is_open())
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3212
  {						// Safety agains reopen
3213 3214 3215 3216 3217 3218
    int tmp_errno= 0;
    char buff[80], *end;
    uint buff_len;
    end= buff;

    if (!(specialflag & SPECIAL_SHORT_LOG_FORMAT))
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3219
    {
3220
      Security_context *sctx= thd->security_ctx;
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3221
      if (current_time != last_time)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3222
      {
3223 3224 3225 3226 3227 3228 3229 3230 3231 3232
        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);

guilhem@mysql.com's avatar
guilhem@mysql.com committed
3233
        /* Note that my_b_write() assumes it knows the length for this */
3234
        if (my_b_write(&log_file, (byte*) buff, buff_len))
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3235
          tmp_errno=errno;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3236
      }
3237
      if (my_b_printf(&log_file, "# User@Host: ", sizeof("# User@Host: ") - 1))
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3238
        tmp_errno=errno;
3239 3240 3241
      if (my_b_printf(&log_file, user_host, user_host_len))
        tmp_errno=errno;
      if (my_b_write(&log_file, (byte*) "\n", 1))
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3242 3243
        tmp_errno=errno;
    }
3244 3245 3246 3247 3248 3249 3250 3251
    /* For slow query log */
    if (my_b_printf(&log_file,
                    "# Query_time: %lu  Lock_time: %lu"
                    " Rows_sent: %lu  Rows_examined: %lu\n",
                    (ulong) query_time, (ulong) lock_time,
                    (ulong) thd->sent_row_count,
                    (ulong) thd->examined_row_count) == (uint) -1)
      tmp_errno=errno;
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265
    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);
    }
    if (thd->last_insert_id_used)
    {
      end=strmov(end,",last_insert_id=");
      end=longlong10_to_str((longlong) thd->current_insert_id,end,-10);
    }
    // Save value if we do an insert.
    if (thd->insert_id_used)
    {
3266
      if (!(specialflag & SPECIAL_SHORT_LOG_FORMAT))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3267
      {
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3268 3269
        end=strmov(end,",insert_id=");
        end=longlong10_to_str((longlong) thd->last_insert_id,end,-10);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3270
      }
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3271
    }
3272 3273 3274 3275 3276 3277 3278 3279 3280

    /*
      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);

guilhem@mysql.com's avatar
guilhem@mysql.com committed
3281 3282 3283 3284 3285 3286 3287 3288
    if (end != buff)
    {
      *end++=';';
      *end='\n';
      if (my_b_write(&log_file, (byte*) "SET ",4) ||
          my_b_write(&log_file, (byte*) buff+1,(uint) (end-buff)))
        tmp_errno=errno;
    }
3289
    if (is_command)
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3290
    {
3291 3292 3293
      end= strxmov(buff, "# administrator command: ", NullS);
      buff_len= (ulong) (end - buff);
      my_b_write(&log_file, (byte*) buff, buff_len);
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3294
    }
3295
    if (my_b_write(&log_file, (byte*) sql_text, sql_text_len) ||
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3296 3297 3298 3299 3300 3301 3302
        my_b_write(&log_file, (byte*) ";\n",2) ||
        flush_io_cache(&log_file))
      tmp_errno=errno;
    if (tmp_errno)
    {
      error=1;
      if (! write_error)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3303
      {
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3304 3305
        write_error=1;
        sql_print_error(ER(ER_ERROR_ON_WRITE),name,error);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3306 3307 3308
      }
    }
  }
monty@mysql.com's avatar
monty@mysql.com committed
3309
  DBUG_RETURN(error);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3310 3311
}

3312

3313 3314 3315 3316 3317 3318
/*
  Wait until we get a signal that the binary log has been updated

  SYNOPSIS
    wait_for_update()
    thd			Thread variable
3319
    is_slave            If 0, the caller is the Binlog_dump thread from master;
3320 3321
                        if 1, the caller is the SQL thread from the slave. This
                        influences only thd->proc_info.
3322 3323 3324

  NOTES
    One must have a lock on LOCK_log before calling this function.
3325
    This lock will be released before return! That's required by
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3326
    THD::enter_cond() (see NOTES in sql_class.h).
3327 3328
*/

3329
void MYSQL_LOG::wait_for_update(THD* thd, bool is_slave)
3330
{
monty@mysql.com's avatar
monty@mysql.com committed
3331 3332
  const char *old_msg;
  DBUG_ENTER("wait_for_update");
3333

monty@mysql.com's avatar
monty@mysql.com committed
3334
  old_msg= thd->enter_cond(&update_cond, &LOCK_log,
3335
                           is_slave ?
monty@mysql.com's avatar
monty@mysql.com committed
3336
                           "Has read all relay log; waiting for the slave I/O "
3337
                           "thread to update it" :
monty@mysql.com's avatar
monty@mysql.com committed
3338
                           "Has sent all binlog to slave; waiting for binlog "
3339
                           "to be updated");
3340 3341
  pthread_cond_wait(&update_cond, &LOCK_log);
  thd->exit_cond(old_msg);
monty@mysql.com's avatar
monty@mysql.com committed
3342
  DBUG_VOID_RETURN;
3343
}
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3344

3345

3346 3347 3348 3349 3350
/*
  Close the log file

  SYNOPSIS
    close()
3351 3352 3353 3354 3355
    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
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3356 3357 3358 3359

  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
3360 3361
*/

3362
void MYSQL_LOG::close(uint exiting)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3363
{					// One can't set log_type here!
3364 3365
  DBUG_ENTER("MYSQL_LOG::close");
  DBUG_PRINT("enter",("exiting: %d", (int) exiting));
3366
  if (log_type != LOG_CLOSED && log_type != LOG_TO_BE_OPENED)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3367
  {
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
3368
#ifdef HAVE_REPLICATION
3369 3370
    if (log_type == LOG_BIN && !no_auto_events &&
	(exiting & LOG_CLOSE_STOP_EVENT))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3371 3372
    {
      Stop_log_event s;
3373
      s.write(&log_file);
3374
      bytes_written+= s.data_written;
3375
      signal_update();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3376
    }
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
3377
#endif /* HAVE_REPLICATION */
3378
    end_io_cache(&log_file);
3379 3380

    /* don't pwrite in a file opened with O_APPEND - it doesn't work */
3381
    if (log_file.type == WRITE_CACHE && log_type == LOG_BIN)
3382 3383
    {
      my_off_t offset= BIN_LOG_HEADER_SIZE + FLAGS_OFFSET;
serg@serg.mylan's avatar
serg@serg.mylan committed
3384
      byte flags=0; // clearing LOG_EVENT_BINLOG_IN_USE_F
3385
      my_pwrite(log_file.file, &flags, 1, offset, MYF(0));
3386 3387
    }

3388 3389 3390 3391 3392 3393
    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)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3394 3395
    {
      write_error=1;
3396
      sql_print_error(ER(ER_ERROR_ON_WRITE), name, errno);
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bk@work.mysql.com committed
3397 3398
    }
  }
3399 3400 3401 3402 3403 3404

  /*
    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.
  */

3405
  if ((exiting & LOG_CLOSE_INDEX) && my_b_inited(&index_file))
3406
  {
3407 3408
    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
3409
    {
3410 3411
      write_error= 1;
      sql_print_error(ER(ER_ERROR_ON_WRITE), index_file_name, errno);
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bk@work.mysql.com committed
3412
    }
3413
  }
3414
  log_type= (exiting & LOG_CLOSE_TO_BE_OPENED) ? LOG_TO_BE_OPENED : LOG_CLOSED;
3415
  safeFree(name);
3416
  DBUG_VOID_RETURN;
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bk@work.mysql.com committed
3417 3418 3419
}


3420 3421 3422 3423 3424 3425 3426 3427 3428
void MYSQL_LOG::set_max_size(ulong max_size_arg)
{
  /*
    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.
  */
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3429 3430
  DBUG_ENTER("MYSQL_LOG::set_max_size");
  pthread_mutex_lock(&LOCK_log);
3431 3432
  if (is_open())
    max_size= max_size_arg;
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3433 3434
  pthread_mutex_unlock(&LOCK_log);
  DBUG_VOID_RETURN;
3435
}
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3436

3437

3438 3439
/*
  Check if a string is a valid number
3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453

  SYNOPSIS
    test_if_number()
    str			String to test
    res			Store value here
    allow_wildcards	Set to 1 if we should ignore '%' and '_'

  NOTE
    For the moment the allow_wildcards argument is not used
    Should be move to some other file.

  RETURN VALUES
    1	String is a number
    0	Error
3454
*/
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3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466

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++;
3467 3468
  while (my_isdigit(files_charset_info,*str) ||
	 (allow_wildcards && (*str == wild_many || *str == wild_one)))
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bk@work.mysql.com committed
3469 3470 3471 3472 3473 3474 3475
  {
    flag=1;
    str++;
  }
  if (*str == '.')
  {
    for (str++ ;
3476
	 my_isdigit(files_charset_info,*str) ||
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bk@work.mysql.com committed
3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487
	   (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 */


serg@serg.mylan's avatar
serg@serg.mylan committed
3488
void print_buffer_to_file(enum loglevel level, const char *buffer)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3489 3490 3491 3492
{
  time_t skr;
  struct tm tm_tmp;
  struct tm *start;
monty@mysql.com's avatar
monty@mysql.com committed
3493 3494
  DBUG_ENTER("print_buffer_to_file");
  DBUG_PRINT("enter",("buffer: %s", buffer));
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bk@work.mysql.com committed
3495 3496

  VOID(pthread_mutex_lock(&LOCK_error_log));
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
3497

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bk@work.mysql.com committed
3498
  skr=time(NULL);
3499
  localtime_r(&skr, &tm_tmp);
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bk@work.mysql.com committed
3500
  start=&tm_tmp;
3501

3502
  fprintf(stderr, "%02d%02d%02d %2d:%02d:%02d [%s] %s\n",
3503 3504 3505 3506 3507 3508
          start->tm_year % 100,
          start->tm_mon+1,
          start->tm_mday,
          start->tm_hour,
          start->tm_min,
          start->tm_sec,
monty@mysql.com's avatar
monty@mysql.com committed
3509
          (level == ERROR_LEVEL ? "ERROR" : level == WARNING_LEVEL ?
3510
           "Warning" : "Note"),
monty@mysql.com's avatar
monty@mysql.com committed
3511
          buffer);
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rburnett@build.mysql.com committed
3512

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bk@work.mysql.com committed
3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527
  fflush(stderr);

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


void sql_perror(const char *message)
{
#ifdef HAVE_STRERROR
  sql_print_error("%s: %s",message, strerror(errno));
#else
  perror(message);
#endif
}
3528

monty@mysql.com's avatar
monty@mysql.com committed
3529

3530 3531 3532
bool flush_error_log()
{
  bool result=0;
3533
  if (opt_error_log)
3534 3535 3536 3537
  {
    char err_renamed[FN_REFLEN], *end;
    end= strmake(err_renamed,log_error_file,FN_REFLEN-4);
    strmov(end, "-old");
3538
    VOID(pthread_mutex_lock(&LOCK_error_log));
3539 3540 3541 3542 3543 3544
#ifdef __WIN__
    char err_temp[FN_REFLEN+4];
    /*
     On Windows is necessary a temporary file for to rename
     the current error file.
    */
3545
    strxmov(err_temp, err_renamed,"-tmp",NullS);
3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558
    (void) my_delete(err_temp, MYF(0)); 
    if (freopen(err_temp,"a+",stdout))
    {
      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);
      int fd, bytes;
      char buf[IO_SIZE];
      if ((fd = my_open(err_temp, O_RDONLY, MYF(0))) >= 0)
      {
        while ((bytes = (int) my_read(fd, (byte*) buf, IO_SIZE, MYF(0))) > 0)
3559
             my_fwrite(stderr, (byte*) buf, bytes, MYF(0));
3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572
        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
3573
    VOID(pthread_mutex_unlock(&LOCK_error_log));
3574 3575 3576
  }
   return result;
}
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3577

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monty@mysql.com committed
3578 3579 3580 3581 3582 3583 3584
void MYSQL_LOG::signal_update()
{
  DBUG_ENTER("MYSQL_LOG::signal_update");
  pthread_cond_broadcast(&update_cond);
  DBUG_VOID_RETURN;
}

3585
#ifdef __NT__
monty@mysql.com's avatar
monty@mysql.com committed
3586 3587
void print_buffer_to_nt_eventlog(enum loglevel level, char *buff,
                                 uint length, int buffLen)
3588 3589 3590 3591
{
  HANDLE event;
  char   *buffptr;
  LPCSTR *buffmsgptr;
serg@serg.mylan's avatar
serg@serg.mylan committed
3592
  DBUG_ENTER("print_buffer_to_nt_eventlog");
3593

monty@mysql.com's avatar
monty@mysql.com committed
3594
  buffptr= buff;
3595
  if (length > (uint)(buffLen-5))
3596
  {
3597
    char *newBuff= new char[length + 5];
serg@serg.mylan's avatar
serg@serg.mylan committed
3598
    strcpy(newBuff, buff);
monty@mysql.com's avatar
monty@mysql.com committed
3599
    buffptr= newBuff;
3600
  }
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monty@mysql.com committed
3601 3602
  strmov(buffptr+length, "\r\n\r\n");
  buffmsgptr= (LPCSTR*) &buffptr;               // Keep windows happy
3603

monty@mysql.com's avatar
monty@mysql.com committed
3604 3605
  setup_windows_event_source();
  if ((event= RegisterEventSource(NULL,"MySQL")))
3606
  {
monty@mysql.com's avatar
monty@mysql.com committed
3607
    switch (level) {
3608
      case ERROR_LEVEL:
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monty@mysql.com committed
3609 3610
        ReportEvent(event, EVENTLOG_ERROR_TYPE, 0, MSG_DEFAULT, NULL, 1, 0,
                    buffmsgptr, NULL);
3611 3612
        break;
      case WARNING_LEVEL:
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monty@mysql.com committed
3613 3614
        ReportEvent(event, EVENTLOG_WARNING_TYPE, 0, MSG_DEFAULT, NULL, 1, 0,
                    buffmsgptr, NULL);
3615 3616
        break;
      case INFORMATION_LEVEL:
monty@mysql.com's avatar
monty@mysql.com committed
3617 3618
        ReportEvent(event, EVENTLOG_INFORMATION_TYPE, 0, MSG_DEFAULT, NULL, 1,
                    0, buffmsgptr, NULL);
3619 3620 3621 3622 3623
        break;
    }
    DeregisterEventSource(event);
  }

monty@mysql.com's avatar
monty@mysql.com committed
3624
  /* if we created a string buffer, then delete it */
serg@serg.mylan's avatar
serg@serg.mylan committed
3625
  if (buffptr != buff)
3626 3627 3628 3629
    delete[] buffptr;

  DBUG_VOID_RETURN;
}
monty@mysql.com's avatar
monty@mysql.com committed
3630 3631
#endif /* __NT__ */

3632 3633

/*
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monty@mysql.com committed
3634 3635
  Prints a printf style message to the error log and, under NT, to the
  Windows event log.
3636 3637 3638

  SYNOPSIS
    vprint_msg_to_log()
monty@mysql.com's avatar
monty@mysql.com committed
3639 3640
    event_type             Type of event to write (Error, Warning, or Info)
    format                 Printf style format of message
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serg@serg.mylan committed
3641
    args                   va_list list of arguments for the message
3642 3643 3644 3645

  NOTE

  IMPLEMENTATION
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monty@mysql.com committed
3646 3647
    This function prints the message into a buffer and then sends that buffer
    to other functions to write that message to other logging sources.
3648 3649

  RETURN VALUES
3650 3651 3652
    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
3653
*/
monty@mysql.com's avatar
monty@mysql.com committed
3654

3655
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
3656 3657
{
  char   buff[1024];
monty@mysql.com's avatar
monty@mysql.com committed
3658
  uint length;
3659
  DBUG_ENTER("vprint_msg_to_log");
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
3660

3661 3662
  /* "- 5" is because of print_buffer_to_nt_eventlog() */
  length= my_vsnprintf(buff, sizeof(buff) - 5, format, args);
serg@serg.mylan's avatar
serg@serg.mylan committed
3663
  print_buffer_to_file(level, buff);
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
3664 3665

#ifdef __NT__
monty@mysql.com's avatar
monty@mysql.com committed
3666
  print_buffer_to_nt_eventlog(level, buff, length, sizeof(buff));
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
3667
#endif
3668

3669
  DBUG_RETURN(0);
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rburnett@build.mysql.com committed
3670 3671
}

3672

monty@mysql.com's avatar
monty@mysql.com committed
3673
void sql_print_error(const char *format, ...) 
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
3674 3675
{
  va_list args;
serg@serg.mylan's avatar
serg@serg.mylan committed
3676
  DBUG_ENTER("sql_print_error");
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
3677

serg@serg.mylan's avatar
serg@serg.mylan committed
3678
  va_start(args, format);
3679
  error_log_print(ERROR_LEVEL, format, args);
serg@serg.mylan's avatar
serg@serg.mylan committed
3680
  va_end(args);
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
3681 3682 3683 3684 3685

  DBUG_VOID_RETURN;
}


monty@mysql.com's avatar
monty@mysql.com committed
3686
void sql_print_warning(const char *format, ...) 
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
3687 3688
{
  va_list args;
serg@serg.mylan's avatar
serg@serg.mylan committed
3689
  DBUG_ENTER("sql_print_warning");
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
3690

serg@serg.mylan's avatar
serg@serg.mylan committed
3691
  va_start(args, format);
3692
  error_log_print(WARNING_LEVEL, format, args);
serg@serg.mylan's avatar
serg@serg.mylan committed
3693
  va_end(args);
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
3694 3695 3696 3697 3698

  DBUG_VOID_RETURN;
}


monty@mysql.com's avatar
monty@mysql.com committed
3699
void sql_print_information(const char *format, ...) 
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
3700 3701
{
  va_list args;
serg@serg.mylan's avatar
serg@serg.mylan committed
3702
  DBUG_ENTER("sql_print_information");
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
3703

serg@serg.mylan's avatar
serg@serg.mylan committed
3704
  va_start(args, format);
3705
  error_log_print(INFORMATION_LEVEL, format, args);
serg@serg.mylan's avatar
serg@serg.mylan committed
3706
  va_end(args);
rburnett@build.mysql.com's avatar
rburnett@build.mysql.com committed
3707

guilhem@mysql.com's avatar
guilhem@mysql.com committed
3708 3709
  DBUG_VOID_RETURN;
}
3710

3711

3712 3713 3714 3715 3716 3717 3718 3719
/********* 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
3720 3721
  states - active, syncing, pool.
  there could be only one page in active or syncing states,
3722
  but many in pool - pool is fifo queue.
3723
  usual lifecycle of a page is pool->active->syncing->pool
3724
  "active" page - is a page where new xid's are logged.
3725 3726
  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.
3727
  when the sync is done the page is moved to a pool and an active page
3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740
  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.
3741 3742 3743 3744
  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)

3745 3746
  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
3747 3748
  dirty - we don't sync removals to disk.
*/
3749 3750 3751 3752 3753

ulong tc_log_page_waits= 0;

#ifdef HAVE_MMAP

3754 3755
#define TC_LOG_HEADER_SIZE (sizeof(tc_log_magic)+1)

3756
static const char tc_log_magic[]={(char) 254, 0x23, 0x05, 0x74};
3757

3758
ulong opt_tc_log_size= TC_LOG_MIN_SIZE;
3759
ulong tc_log_max_pages_used=0, tc_log_page_size=0, tc_log_cur_pages_used=0;
3760 3761 3762 3763 3764 3765 3766

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

3767
  DBUG_ASSERT(total_ha_2pc > 1);
3768 3769
  DBUG_ASSERT(opt_name && opt_name[0]);

serg@serg.mylan's avatar
serg@serg.mylan committed
3770
  tc_log_page_size= my_getpagesize();
3771 3772 3773
  DBUG_ASSERT(TC_LOG_PAGE_SIZE % tc_log_page_size == 0);

  fn_format(logname,opt_name,mysql_data_home,"",MY_UNPACK_FILENAME);
3774
  if ((fd= my_open(logname, O_RDWR, MYF(0))) < 0)
3775
  {
3776 3777
    if (my_errno != ENOENT)
      goto err;
3778 3779
    if (using_heuristic_recover())
      return 1;
3780
    if ((fd= my_create(logname, O_RDWR, 0, MYF(MY_WME))) < 0)
3781 3782
      goto err;
    inited=1;
3783
    file_length= opt_tc_log_size;
3784 3785 3786 3787 3788
    if (my_chsize(fd, file_length, 0, MYF(MY_WME)))
      goto err;
  }
  else
  {
3789 3790
    inited= 1;
    crashed= TRUE;
serg@serg.mylan's avatar
serg@serg.mylan committed
3791
    sql_print_information("Recovering after a crash using %s", opt_name);
3792 3793 3794 3795 3796 3797
    if (tc_heuristic_recover)
    {
      sql_print_error("Cannot perform automatic crash recovery when "
                      "--tc-heuristic-recover is used");
      goto err;
    }
3798
    file_length= my_seek(fd, 0L, MY_SEEK_END, MYF(MY_WME+MY_FAE));
3799 3800 3801 3802
    if (file_length == MY_FILEPOS_ERROR || file_length % tc_log_page_size)
      goto err;
  }

3803
  data= (uchar *)my_mmap(0, (size_t)file_length, PROT_READ|PROT_WRITE,
3804 3805 3806 3807 3808 3809 3810 3811
                        MAP_NOSYNC|MAP_SHARED, fd, 0);
  if (data == MAP_FAILED)
  {
    my_errno=errno;
    goto err;
  }
  inited=2;

3812
  npages=(uint)file_length/tc_log_page_size;
3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829
  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);
3830
  pages[0].start=pages[0].end-pages[0].size;
3831 3832 3833
  pages[npages-1].next=0;
  inited=4;

3834
  if (crashed && recover())
3835
      goto err;
3836

3837
  memcpy(data, tc_log_magic, sizeof(tc_log_magic));
3838
  data[sizeof(tc_log_magic)]= (uchar)total_ha_2pc;
3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849
  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;

3850
  syncing= 0;
3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862
  active=pages;
  pool=pages+1;
  pool_last=pages+npages-1;

  return 0;

err:
  close();
  return 1;
}

/*
3863 3864
  there is no active page, let's got one from the pool

3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876
  two strategies here:
  1. take the first from the pool
  2. if there're waiters - take the one with the most free space

  TODO page merging. try to allocate adjacent page first,
  so that they can be flushed both in one sync
*/
void TC_LOG_MMAP::get_active_from_pool()
{
  PAGE **p, **best_p=0;
  int best_free;

3877 3878 3879
  if (syncing)
    pthread_mutex_lock(&LOCK_pool);

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  do
  {
    best_p= p= &pool;
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    if ((*p)->waiters == 0) // can the first page be used ?
      break;                // yes - take it.
3885

3886
    best_free=0;            // no - trying second strategy
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    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;
3899
  if (active->free == active->size) // we've chosen an empty page
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  {
    tc_log_cur_pages_used++;
    set_if_bigger(tc_log_max_pages_used, tc_log_cur_pages_used);
  }

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  if ((*best_p)->next)              // unlink the page from the pool
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    *best_p=(*best_p)->next;
  else
    pool_last=*best_p;
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  if (syncing)
    pthread_mutex_unlock(&LOCK_pool);
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}

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);
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  return 1; // always return 1
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}

/*
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  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

  RETURN
         0  - error
  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.
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*/

int TC_LOG_MMAP::log(THD *thd, my_xid xid)
{
  int err;
  PAGE *p;
  ulong cookie;

  pthread_mutex_lock(&LOCK_active);

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  /*
    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.
  */
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  while (unlikely(active && active->free == 0))
    pthread_cond_wait(&COND_active, &LOCK_active);

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  /* no active page ? take one from the pool */
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  if (active == 0)
    get_active_from_pool();

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

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  /* searching for an empty slot */
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  while (*p->ptr)
  {
    p->ptr++;
    DBUG_ASSERT(p->ptr < p->end);               // because p->free > 0
  }

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

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

3984
  if (syncing)
3985 3986
  {                                          // somebody's syncing. let's wait
    p->waiters++;
3987
    /*
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3988
      note - it must be while (), not do ... while () here
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      as p->state may be not DIRTY when we come here
    */
    while (p->state == DIRTY && syncing)
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      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
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  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
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  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;

4020
  DBUG_ASSERT(syncing != active);
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  /*
    sit down and relax - this can take a while...
    note - no locks are held at this point
  */
4026
  err= my_msync(fd, syncing->start, 1, MS_SYNC);
4027

4028
  /* page is synced. let's move it to the pool */
4029
  pthread_mutex_lock(&LOCK_pool);
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  pool_last->next=syncing;
  pool_last=syncing;
  syncing->next=0;
  syncing->state= err ? ERROR : POOL;
  pthread_cond_broadcast(&syncing->cond);    // signal "sync done"
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  pthread_cond_signal(&COND_pool);           // in case somebody's waiting
  pthread_mutex_unlock(&LOCK_pool);

4038
  /* marking 'syncing' slot free */
4039
  pthread_mutex_lock(&LOCK_sync);
4040
  syncing=0;
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  pthread_cond_signal(&active->cond);        // wake up a new syncer
  pthread_mutex_unlock(&LOCK_sync);
  return err;
}

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/*
  erase xid from the page, update page free space counters/pointers.
  cookie points directly to the memory where xid was logged
*/
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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);
4063
  if (p->free == p->size)               // the page is completely empty
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    statistic_decrement(tc_log_cur_pages_used, &LOCK_status);
  if (p->waiters == 0)                 // the page is in pool and ready to rock
4066
    pthread_cond_signal(&COND_pool);   // ping ... for overflow()
4067 4068 4069 4070 4071
  pthread_mutex_unlock(&p->lock);
}

void TC_LOG_MMAP::close()
{
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4072
  uint i;
4073 4074 4075 4076 4077 4078 4079 4080 4081
  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:
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4082
    for (i=0; i < npages; i++)
4083 4084 4085 4086 4087 4088 4089 4090 4091
    {
      if (pages[i].ptr == 0)
        break;
      pthread_mutex_destroy(&pages[i].lock);
      pthread_cond_destroy(&pages[i].cond);
    }
  case 3:
    my_free((gptr)pages, MYF(0));
  case 2:
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4092
    my_munmap((byte*)data, (size_t)file_length);
4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117
  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)
  {
4118
    sql_print_error("Recovery failed! You must enable "
4119 4120 4121
                    "exactly %d storage engines that support "
                    "two-phase commit protocol",
                    data[sizeof(tc_log_magic)]);
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    goto err1;
  }

  if (hash_init(&xids, &my_charset_bin, tc_log_page_size/3, 0,
            sizeof(my_xid), 0, 0, MYF(0)))
    goto err1;

  for ( ; p < end_p ; p++)
  {
    for (my_xid *x=p->start; x < p->end; x++)
      if (*x && my_hash_insert(&xids, (byte *)x))
        goto err2; // OOM
  }

  if (ha_recover(&xids))
    goto err2;

  hash_free(&xids);
4140
  bzero(data, (size_t)file_length);
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  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;
}
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serg@serg.mylan committed
4152 4153 4154 4155 4156
#endif

TC_LOG *tc_log;
TC_LOG_DUMMY tc_log_dummy;
TC_LOG_MMAP  tc_log_mmap;
4157

4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169
/*
  Perform heuristic recovery, if --tc-heuristic-recover was used

  RETURN VALUE
    0	no heuristic recovery was requested
    1   heuristic recovery was performed

  NOTE
    no matter whether heuristic recovery was successful or not
    mysqld must exit. So, return value is the same in both cases.
*/

4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182
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 ******/
4183
#define TC_LOG_BINLOG MYSQL_LOG
4184 4185 4186 4187 4188 4189 4190 4191

/*
  TODO keep in-memory list of prepared transactions
  (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!
*/

4192
int TC_LOG_BINLOG::open(const char *opt_name)
4193
{
4194 4195
  LOG_INFO log_info;
  int      error= 1;
4196 4197

  DBUG_ASSERT(total_ha_2pc > 1);
4198
  DBUG_ASSERT(opt_name && opt_name[0]);
4199 4200 4201 4202

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

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

4210
  if (using_heuristic_recover())
4211 4212 4213 4214
  {
    /* generate a new binlog to mask a corrupted one */
    open(opt_name, LOG_BIN, 0, WRITE_CACHE, 0, max_binlog_size, 0);
    cleanup();
4215
    return 1;
4216
  }
4217

4218
  if ((error= find_log_pos(&log_info, NullS, 1)))
4219
  {
4220 4221 4222 4223 4224
    if (error != LOG_INFO_EOF)
      sql_print_error("find_log_pos() failed (error: %d)", error);
    else
      error= 0;
    goto err;
4225
  }
4226 4227 4228 4229 4230

  {
    const char *errmsg;
    IO_CACHE    log;
    File        file;
4231 4232
    Log_event  *ev=0;
    Format_description_log_event fdle(BINLOG_VERSION);
4233
    char        log_name[FN_REFLEN];
4234 4235 4236 4237

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

4238
    do
4239
    {
4240 4241 4242 4243 4244 4245 4246
      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;
4247
    }
4248

4249
    if ((file= open_binlog(&log, log_name, &errmsg)) < 0)
4250 4251 4252 4253 4254
    {
      sql_print_error("%s", errmsg);
      goto err;
    }

4255 4256 4257
    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)
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    {
      sql_print_information("Recovering after a crash using %s", opt_name);
4260
      error= recover(&log, (Format_description_log_event *)ev);
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    }
4262 4263
    else
      error=0;
4264 4265 4266 4267 4268 4269 4270 4271 4272 4273

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

    if (error)
      goto err;
  }

err:
4274
  return error;
4275 4276
}

4277 4278
/* this is called on shutdown, after ha_panic */
void TC_LOG_BINLOG::close()
4279 4280 4281 4282 4283 4284
{
  DBUG_ASSERT(prepared_xids==0);
  pthread_mutex_destroy(&LOCK_prep_xids);
  pthread_cond_destroy (&COND_prep_xids);
}

4285 4286 4287 4288 4289 4290 4291 4292
/*
  TODO group commit

  RETURN
         0  - error
         1  - success
*/
int TC_LOG_BINLOG::log(THD *thd, my_xid xid)
4293
{
4294
  DBUG_ENTER("TC_LOG_BINLOG::log");
4295
  Xid_log_event xle(thd, xid);
4296 4297 4298
  binlog_trx_data *trx_data=
    (binlog_trx_data*) thd->ha_data[binlog_hton.slot];
  DBUG_RETURN(!binlog_end_trans(thd, trx_data, &xle));  // invert return value
4299 4300
}

4301
void TC_LOG_BINLOG::unlog(ulong cookie, my_xid xid)
4302
{
4303 4304
  pthread_mutex_lock(&LOCK_prep_xids);
  if (--prepared_xids == 0)
4305
    pthread_cond_signal(&COND_prep_xids);
4306
  pthread_mutex_unlock(&LOCK_prep_xids);
4307
  rotate_and_purge(0);     // as ::write() did not rotate
4308 4309
}

4310
int TC_LOG_BINLOG::recover(IO_CACHE *log, Format_description_log_event *fdle)
4311 4312 4313 4314 4315 4316
{
  Log_event  *ev;
  HASH xids;
  MEM_ROOT mem_root;

  if (! fdle->is_valid() ||
4317
      hash_init(&xids, &my_charset_bin, TC_LOG_PAGE_SIZE/3, 0,
4318 4319 4320
            sizeof(my_xid), 0, 0, MYF(0)))
    goto err1;

4321
  init_alloc_root(&mem_root, TC_LOG_PAGE_SIZE, TC_LOG_PAGE_SIZE);
4322

4323 4324
  fdle->flags&= ~LOG_EVENT_BINLOG_IN_USE_F; // abort on the first error

4325 4326 4327 4328 4329
  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;
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4330 4331
      byte *x=(byte *)memdup_root(&mem_root, (char *)& xev->xid,
                                  sizeof(xev->xid));
4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356
      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;
}

acurtis@xiphis.org's avatar
acurtis@xiphis.org committed
4357 4358 4359 4360 4361

mysql_declare_plugin(binlog)
{
  MYSQL_STORAGE_ENGINE_PLUGIN,
  &binlog_hton,
4362
  binlog_hton_name,
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4363
  "MySQL AB",
4364
  binlog_hton_comment,
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  NULL, /* Plugin Init */
  NULL, /* Plugin Deinit */
  0x0100 /* 1.0 */,
}
mysql_declare_plugin_end;