path: root/storage/innobase/srv/srv0start.c

/*****************************************************************************

Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved.
Copyright (c) 2008, Google Inc.

Portions of this file contain modifications contributed and copyrighted by
Google, Inc. Those modifications are gratefully acknowledged and are described
briefly in the InnoDB documentation. The contributions by Google are
incorporated with their permission, and subject to the conditions contained in
the file COPYING.Google.

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; version 2 of the License.

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.

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

*****************************************************************************/
/***********************************************************************

Copyright (c) 1995, 2009, Innobase Oy. All Rights Reserved.
Copyright (c) 2009, Percona Inc.

Portions of this file contain modifications contributed and copyrighted
by Percona Inc.. Those modifications are
gratefully acknowledged and are described briefly in the InnoDB
documentation. The contributions by Percona Inc. are incorporated with
their permission, and subject to the conditions contained in the file
COPYING.Percona.

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; version 2 of the License.

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.

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

***********************************************************************/

/********************************************************************//**
@file srv/srv0start.c
Starts the InnoDB database server

Created 2/16/1996 Heikki Tuuri
*************************************************************************/

#include "ut0mem.h"
#include "mem0mem.h"
#include "data0data.h"
#include "data0type.h"
#include "dict0dict.h"
#include "buf0buf.h"
#include "os0file.h"
#include "os0thread.h"
#include "fil0fil.h"
#include "fsp0fsp.h"
#include "rem0rec.h"
#include "mtr0mtr.h"
#include "log0log.h"
#include "log0recv.h"
#include "page0page.h"
#include "page0cur.h"
#include "trx0trx.h"
#include "trx0sys.h"
#include "btr0btr.h"
#include "btr0cur.h"
#include "rem0rec.h"
#include "ibuf0ibuf.h"
#include "srv0start.h"
#include "srv0srv.h"
#ifndef UNIV_HOTBACKUP
# include "os0proc.h"
# include "sync0sync.h"
# include "buf0flu.h"
# include "buf0rea.h"
# include "dict0boot.h"
# include "dict0load.h"
# include "que0que.h"
# include "usr0sess.h"
# include "lock0lock.h"
# include "trx0roll.h"
# include "trx0purge.h"
# include "lock0lock.h"
# include "pars0pars.h"
# include "btr0sea.h"
# include "rem0cmp.h"
# include "dict0crea.h"
# include "row0ins.h"
# include "row0sel.h"
# include "row0upd.h"
# include "row0row.h"
# include "row0mysql.h"
# include "btr0pcur.h"

/** Log sequence number immediately after startup */
UNIV_INTERN ib_uint64_t	srv_start_lsn;
/** Log sequence number at shutdown */
UNIV_INTERN ib_uint64_t	srv_shutdown_lsn;

#ifdef HAVE_DARWIN_THREADS
# include <sys/utsname.h>
/** TRUE if the F_FULLFSYNC option is available */
UNIV_INTERN ibool	srv_have_fullfsync = FALSE;
#endif

/** TRUE if a raw partition is in use */
UNIV_INTERN ibool	srv_start_raw_disk_in_use = FALSE;

/** TRUE if the server is being started, before rolling back any
incomplete transactions */
UNIV_INTERN ibool	srv_startup_is_before_trx_rollback_phase = FALSE;
/** TRUE if the server is being started */
UNIV_INTERN ibool	srv_is_being_started = FALSE;
/** TRUE if the server was successfully started */
UNIV_INTERN ibool	srv_was_started = FALSE;
/** TRUE if innobase_start_or_create_for_mysql() has been called */
static ibool	srv_start_has_been_called = FALSE;

/** At a shutdown this value climbs from SRV_SHUTDOWN_NONE to
SRV_SHUTDOWN_CLEANUP and then to SRV_SHUTDOWN_LAST_PHASE, and so on */
UNIV_INTERN enum srv_shutdown_state	srv_shutdown_state = SRV_SHUTDOWN_NONE;

/** Files comprising the system tablespace */
static os_file_t	files[1000];

/** Mutex protecting the ios count */
static mutex_t		ios_mutex;
/** Count of I/O operations in io_handler_thread() */
static ulint		ios;

/** io_handler_thread parameters for thread identification */
static ulint		n[SRV_MAX_N_IO_THREADS + 5];
/** io_handler_thread identifiers */
static os_thread_id_t	thread_ids[SRV_MAX_N_IO_THREADS + 5];

/** We use this mutex to test the return value of pthread_mutex_trylock
   on successful locking. HP-UX does NOT return 0, though Linux et al do. */
static os_fast_mutex_t	srv_os_test_mutex;

/** Name of srv_monitor_file */
static char*	srv_monitor_file_name;
#endif /* !UNIV_HOTBACKUP */

/** */
#define SRV_N_PENDING_IOS_PER_THREAD	OS_AIO_N_PENDING_IOS_PER_THREAD
#define SRV_MAX_N_PENDING_SYNC_IOS	100


/*********************************************************************//**
Convert a numeric string that optionally ends in G or M, to a number
containing megabytes.
@return	next character in string */
static
char*
srv_parse_megabytes(
/*================*/
	char*	str,	/*!< in: string containing a quantity in bytes */
	ulint*	megs)	/*!< out: the number in megabytes */
{
	char*	endp;
	ulint	size;

	size = strtoul(str, &endp, 10);

	str = endp;

	switch (*str) {
	case 'G': case 'g':
		size *= 1024;
		/* fall through */
	case 'M': case 'm':
		str++;
		break;
	default:
		size /= 1024 * 1024;
		break;
	}

	*megs = size;
	return(str);
}

/*********************************************************************//**
Reads the data files and their sizes from a character string given in
the .cnf file.
@return	TRUE if ok, FALSE on parse error */
UNIV_INTERN
ibool
srv_parse_data_file_paths_and_sizes(
/*================================*/
	char*	str)	/*!< in/out: the data file path string */
{
	char*	input_str;
	char*	path;
	ulint	size;
	ulint	i	= 0;

	srv_auto_extend_last_data_file = FALSE;
	srv_last_file_size_max = 0;
	srv_data_file_names = NULL;
	srv_data_file_sizes = NULL;
	srv_data_file_is_raw_partition = NULL;

	input_str = str;

	/* First calculate the number of data files and check syntax:
	path:size[M | G];path:size[M | G]... . Note that a Windows path may
	contain a drive name and a ':'. */

	while (*str != '\0') {
		path = str;

		while ((*str != ':' && *str != '\0')
		       || (*str == ':'
			   && (*(str + 1) == '\\' || *(str + 1) == '/'
			       || *(str + 1) == ':'))) {
			str++;
		}

		if (*str == '\0') {
			return(FALSE);
		}

		str++;

		str = srv_parse_megabytes(str, &size);

		if (0 == strncmp(str, ":autoextend",
				 (sizeof ":autoextend") - 1)) {

			str += (sizeof ":autoextend") - 1;

			if (0 == strncmp(str, ":max:",
					 (sizeof ":max:") - 1)) {

				str += (sizeof ":max:") - 1;

				str = srv_parse_megabytes(str, &size);
			}

			if (*str != '\0') {

				return(FALSE);
			}
		}

		if (strlen(str) >= 6
		    && *str == 'n'
		    && *(str + 1) == 'e'
		    && *(str + 2) == 'w') {
			str += 3;
		}

		if (*str == 'r' && *(str + 1) == 'a' && *(str + 2) == 'w') {
			str += 3;
		}

		if (size == 0) {
			return(FALSE);
		}

		i++;

		if (*str == ';') {
			str++;
		} else if (*str != '\0') {

			return(FALSE);
		}
	}

	if (i == 0) {
		/* If innodb_data_file_path was defined it must contain
		at least one data file definition */

		return(FALSE);
	}

	srv_data_file_names = malloc(i * sizeof *srv_data_file_names);
	srv_data_file_sizes = malloc(i * sizeof *srv_data_file_sizes);
	srv_data_file_is_raw_partition = malloc(
		i * sizeof *srv_data_file_is_raw_partition);

	srv_n_data_files = i;

	/* Then store the actual values to our arrays */

	str = input_str;
	i = 0;

	while (*str != '\0') {
		path = str;

		/* Note that we must step over the ':' in a Windows path;
		a Windows path normally looks like C:\ibdata\ibdata1:1G, but
		a Windows raw partition may have a specification like
		\\.\C::1Gnewraw or \\.\PHYSICALDRIVE2:1Gnewraw */

		while ((*str != ':' && *str != '\0')
		       || (*str == ':'
			   && (*(str + 1) == '\\' || *(str + 1) == '/'
			       || *(str + 1) == ':'))) {
			str++;
		}

		if (*str == ':') {
			/* Make path a null-terminated string */
			*str = '\0';
			str++;
		}

		str = srv_parse_megabytes(str, &size);

		srv_data_file_names[i] = path;
		srv_data_file_sizes[i] = size;

		if (0 == strncmp(str, ":autoextend",
				 (sizeof ":autoextend") - 1)) {

			srv_auto_extend_last_data_file = TRUE;

			str += (sizeof ":autoextend") - 1;

			if (0 == strncmp(str, ":max:",
					 (sizeof ":max:") - 1)) {

				str += (sizeof ":max:") - 1;

				str = srv_parse_megabytes(
					str, &srv_last_file_size_max);
			}

			if (*str != '\0') {

				return(FALSE);
			}
		}

		(srv_data_file_is_raw_partition)[i] = 0;

		if (strlen(str) >= 6
		    && *str == 'n'
		    && *(str + 1) == 'e'
		    && *(str + 2) == 'w') {
			str += 3;
			(srv_data_file_is_raw_partition)[i] = SRV_NEW_RAW;
		}

		if (*str == 'r' && *(str + 1) == 'a' && *(str + 2) == 'w') {
			str += 3;

			if ((srv_data_file_is_raw_partition)[i] == 0) {
				(srv_data_file_is_raw_partition)[i] = SRV_OLD_RAW;
			}
		}

		i++;

		if (*str == ';') {
			str++;
		}
	}

	return(TRUE);
}

/*********************************************************************//**
Reads log group home directories from a character string given in
the .cnf file.
@return	TRUE if ok, FALSE on parse error */
UNIV_INTERN
ibool
srv_parse_log_group_home_dirs(
/*==========================*/
	char*	str)	/*!< in/out: character string */
{
	char*	input_str;
	char*	path;
	ulint	i	= 0;

	srv_log_group_home_dirs = NULL;

	input_str = str;

	/* First calculate the number of directories and check syntax:
	path;path;... */

	while (*str != '\0') {
		path = str;

		while (*str != ';' && *str != '\0') {
			str++;
		}

		i++;

		if (*str == ';') {
			str++;
		} else if (*str != '\0') {

			return(FALSE);
		}
	}

	if (i != 1) {
		/* If innodb_log_group_home_dir was defined it must
		contain exactly one path definition under current MySQL */

		return(FALSE);
	}

	srv_log_group_home_dirs = malloc(i * sizeof *srv_log_group_home_dirs);

	/* Then store the actual values to our array */

	str = input_str;
	i = 0;

	while (*str != '\0') {
		path = str;

		while (*str != ';' && *str != '\0') {
			str++;
		}

		if (*str == ';') {
			*str = '\0';
			str++;
		}

		srv_log_group_home_dirs[i] = path;

		i++;
	}

	return(TRUE);
}

/*********************************************************************//**
Frees the memory allocated by srv_parse_data_file_paths_and_sizes()
and srv_parse_log_group_home_dirs(). */
UNIV_INTERN
void
srv_free_paths_and_sizes(void)
/*==========================*/
{
	free(srv_data_file_names);
	srv_data_file_names = NULL;
	free(srv_data_file_sizes);
	srv_data_file_sizes = NULL;
	free(srv_data_file_is_raw_partition);
	srv_data_file_is_raw_partition = NULL;
	free(srv_log_group_home_dirs);
	srv_log_group_home_dirs = NULL;
}

#ifndef UNIV_HOTBACKUP
/********************************************************************//**
I/o-handler thread function.
@return	OS_THREAD_DUMMY_RETURN */
static
os_thread_ret_t
io_handler_thread(
/*==============*/
	void*	arg)	/*!< in: pointer to the number of the segment in
			the aio array */
{
	ulint	segment;
	ulint	i;

	segment = *((ulint*)arg);

#ifdef UNIV_DEBUG_THREAD_CREATION
	fprintf(stderr, "Io handler thread %lu starts, id %lu\n", segment,
		os_thread_pf(os_thread_get_curr_id()));
#endif
	for (i = 0;; i++) {
		fil_aio_wait(segment);

		mutex_enter(&ios_mutex);
		ios++;
		mutex_exit(&ios_mutex);
	}

	/* We count the number of threads in os_thread_exit(). A created
	thread should always use that to exit and not use return() to exit.
	The thread actually never comes here because it is exited in an
	os_event_wait(). */

	os_thread_exit(NULL);

	OS_THREAD_DUMMY_RETURN;
}
#endif /* !UNIV_HOTBACKUP */

#ifdef __WIN__
#define SRV_PATH_SEPARATOR	'\\'
#else
#define SRV_PATH_SEPARATOR	'/'
#endif

/*********************************************************************//**
Normalizes a directory path for Windows: converts slashes to backslashes. */
UNIV_INTERN
void
srv_normalize_path_for_win(
/*=======================*/
	char*	str __attribute__((unused)))	/*!< in/out: null-terminated
						character string */
{
#ifdef __WIN__
	for (; *str; str++) {

		if (*str == '/') {
			*str = '\\';
		}
	}
#endif
}

/*********************************************************************//**
Adds a slash or a backslash to the end of a string if it is missing
and the string is not empty.
@return	string which has the separator if the string is not empty */
UNIV_INTERN
char*
srv_add_path_separator_if_needed(
/*=============================*/
	char*	str)	/*!< in: null-terminated character string */
{
	char*	out_str;
	ulint	len	= ut_strlen(str);

	if (len == 0 || str[len - 1] == SRV_PATH_SEPARATOR) {

		return(str);
	}

	out_str = ut_malloc(len + 2);
	memcpy(out_str, str, len);
	out_str[len] = SRV_PATH_SEPARATOR;
	out_str[len + 1] = 0;

	return(out_str);
}

#ifndef UNIV_HOTBACKUP
/*********************************************************************//**
Calculates the low 32 bits when a file size which is given as a number
database pages is converted to the number of bytes.
@return	low 32 bytes of file size when expressed in bytes */
static
ulint
srv_calc_low32(
/*===========*/
	ulint	file_size)	/*!< in: file size in database pages */
{
	return(0xFFFFFFFFUL & (file_size << UNIV_PAGE_SIZE_SHIFT));
}

/*********************************************************************//**
Calculates the high 32 bits when a file size which is given as a number
database pages is converted to the number of bytes.
@return	high 32 bytes of file size when expressed in bytes */
static
ulint
srv_calc_high32(
/*============*/
	ulint	file_size)	/*!< in: file size in database pages */
{
	return(file_size >> (32 - UNIV_PAGE_SIZE_SHIFT));
}

/*********************************************************************//**
Creates or opens the log files and closes them.
@return	DB_SUCCESS or error code */
static
ulint
open_or_create_log_file(
/*====================*/
	ibool	create_new_db,		/*!< in: TRUE if we should create a
					new database */
	ibool*	log_file_created,	/*!< out: TRUE if new log file
					created */
	ibool	log_file_has_been_opened,/*!< in: TRUE if a log file has been
					opened before: then it is an error
					to try to create another log file */
	ulint	k,			/*!< in: log group number */
	ulint	i)			/*!< in: log file number in group */
{
	ibool	ret;
	ulint	size;
	ulint	size_high;
	char	name[10000];

	UT_NOT_USED(create_new_db);

	*log_file_created = FALSE;

	srv_normalize_path_for_win(srv_log_group_home_dirs[k]);
	srv_log_group_home_dirs[k] = srv_add_path_separator_if_needed(
		srv_log_group_home_dirs[k]);

	ut_a(strlen(srv_log_group_home_dirs[k])
	     < (sizeof name) - 10 - sizeof "ib_logfile");
	sprintf(name, "%s%s%lu", srv_log_group_home_dirs[k],
		"ib_logfile", (ulong) i);

	files[i] = os_file_create(name, OS_FILE_CREATE, OS_FILE_NORMAL,
				  OS_LOG_FILE, &ret);
	if (ret == FALSE) {
		if (os_file_get_last_error(FALSE) != OS_FILE_ALREADY_EXISTS
#ifdef UNIV_AIX
		    /* AIX 5.1 after security patch ML7 may have errno set
		    to 0 here, which causes our function to return 100;
		    work around that AIX problem */
		    && os_file_get_last_error(FALSE) != 100
#endif
		    ) {
			fprintf(stderr,
				"InnoDB: Error in creating"
				" or opening %s\n", name);

			return(DB_ERROR);
		}

		files[i] = os_file_create(name, OS_FILE_OPEN, OS_FILE_AIO,
					  OS_LOG_FILE, &ret);
		if (!ret) {
			fprintf(stderr,
				"InnoDB: Error in opening %s\n", name);

			return(DB_ERROR);
		}

		ret = os_file_get_size(files[i], &size, &size_high);
		ut_a(ret);

		if (size != srv_calc_low32(srv_log_file_size)
		    || size_high != srv_calc_high32(srv_log_file_size)) {

			fprintf(stderr,
				"InnoDB: Error: log file %s is"
				" of different size %lu %lu bytes\n"
				"InnoDB: than specified in the .cnf"
				" file %lu %lu bytes!\n",
				name, (ulong) size_high, (ulong) size,
				(ulong) srv_calc_high32(srv_log_file_size),
				(ulong) srv_calc_low32(srv_log_file_size));

			return(DB_ERROR);
		}
	} else {
		*log_file_created = TRUE;

		ut_print_timestamp(stderr);

		fprintf(stderr,
			"  InnoDB: Log file %s did not exist:"
			" new to be created\n",
			name);
		if (log_file_has_been_opened) {

			return(DB_ERROR);
		}

		fprintf(stderr, "InnoDB: Setting log file %s size to %lu MB\n",
			name, (ulong) srv_log_file_size
			>> (20 - UNIV_PAGE_SIZE_SHIFT));

		fprintf(stderr,
			"InnoDB: Database physically writes the file"
			" full: wait...\n");

		ret = os_file_set_size(name, files[i],
				       srv_calc_low32(srv_log_file_size),
				       srv_calc_high32(srv_log_file_size));
		if (!ret) {
			fprintf(stderr,
				"InnoDB: Error in creating %s:"
				" probably out of disk space\n",
				name);

			return(DB_ERROR);
		}
	}

	ret = os_file_close(files[i]);
	ut_a(ret);

	if (i == 0) {
		/* Create in memory the file space object
		which is for this log group */

		fil_space_create(name,
				 2 * k + SRV_LOG_SPACE_FIRST_ID, 0, FIL_LOG);
	}

	ut_a(fil_validate());

	fil_node_create(name, srv_log_file_size,
			2 * k + SRV_LOG_SPACE_FIRST_ID, FALSE);
#ifdef UNIV_LOG_ARCHIVE
	/* If this is the first log group, create the file space object
	for archived logs.
	Under MySQL, no archiving ever done. */

	if (k == 0 && i == 0) {
		arch_space_id = 2 * k + 1 + SRV_LOG_SPACE_FIRST_ID;

		fil_space_create("arch_log_space", arch_space_id, 0, FIL_LOG);
	} else {
		arch_space_id = ULINT_UNDEFINED;
	}
#endif /* UNIV_LOG_ARCHIVE */
	if (i == 0) {
		log_group_init(k, srv_n_log_files,
			       srv_log_file_size * UNIV_PAGE_SIZE,
			       2 * k + SRV_LOG_SPACE_FIRST_ID,
			       SRV_LOG_SPACE_FIRST_ID + 1); /* dummy arch
							    space id */
	}

	return(DB_SUCCESS);
}

/*********************************************************************//**
Creates or opens database data files and closes them.
@return	DB_SUCCESS or error code */
static
ulint
open_or_create_data_files(
/*======================*/
	ibool*		create_new_db,	/*!< out: TRUE if new database should be
					created */
#ifdef UNIV_LOG_ARCHIVE
	ulint*		min_arch_log_no,/*!< out: min of archived log
					numbers in data files */
	ulint*		max_arch_log_no,/*!< out: max of archived log
					numbers in data files */
#endif /* UNIV_LOG_ARCHIVE */
	ib_uint64_t*	min_flushed_lsn,/*!< out: min of flushed lsn
					values in data files */
	ib_uint64_t*	max_flushed_lsn,/*!< out: max of flushed lsn
					values in data files */
	ulint*		sum_of_new_sizes)/*!< out: sum of sizes of the
					new files added */
{
	ibool	ret;
	ulint	i;
	ibool	one_opened	= FALSE;
	ibool	one_created	= FALSE;
	ulint	size;
	ulint	size_high;
	ulint	rounded_size_pages;
	char	name[10000];

	if (srv_n_data_files >= 1000) {
		fprintf(stderr, "InnoDB: can only have < 1000 data files\n"
			"InnoDB: you have defined %lu\n",
			(ulong) srv_n_data_files);
		return(DB_ERROR);
	}

	*sum_of_new_sizes = 0;

	*create_new_db = FALSE;

	srv_normalize_path_for_win(srv_data_home);
	srv_data_home = srv_add_path_separator_if_needed(srv_data_home);

	for (i = 0; i < srv_n_data_files; i++) {
		srv_normalize_path_for_win(srv_data_file_names[i]);

		ut_a(strlen(srv_data_home) + strlen(srv_data_file_names[i])
		     < (sizeof name) - 1);
		sprintf(name, "%s%s", srv_data_home, srv_data_file_names[i]);

		if (srv_data_file_is_raw_partition[i] == 0) {

			/* First we try to create the file: if it already
			exists, ret will get value FALSE */

			files[i] = os_file_create(name, OS_FILE_CREATE,
						  OS_FILE_NORMAL,
						  OS_DATA_FILE, &ret);

			if (ret == FALSE && os_file_get_last_error(FALSE)
			    != OS_FILE_ALREADY_EXISTS
#ifdef UNIV_AIX
			    /* AIX 5.1 after security patch ML7 may have
			    errno set to 0 here, which causes our function
			    to return 100; work around that AIX problem */
			    && os_file_get_last_error(FALSE) != 100
#endif
			    ) {
				fprintf(stderr,
					"InnoDB: Error in creating"
					" or opening %s\n",
					name);

				return(DB_ERROR);
			}
		} else if (srv_data_file_is_raw_partition[i] == SRV_NEW_RAW) {
			/* The partition is opened, not created; then it is
			written over */

			srv_start_raw_disk_in_use = TRUE;
			srv_created_new_raw = TRUE;

			files[i] = os_file_create(name, OS_FILE_OPEN_RAW,
						  OS_FILE_NORMAL,
						  OS_DATA_FILE, &ret);
			if (!ret) {
				fprintf(stderr,
					"InnoDB: Error in opening %s\n", name);

				return(DB_ERROR);
			}
		} else if (srv_data_file_is_raw_partition[i] == SRV_OLD_RAW) {
			srv_start_raw_disk_in_use = TRUE;

			ret = FALSE;
		} else {
			ut_a(0);
		}

		if (ret == FALSE) {
			/* We open the data file */

			if (one_created) {
				fprintf(stderr,
					"InnoDB: Error: data files can only"
					" be added at the end\n");
				fprintf(stderr,
					"InnoDB: of a tablespace, but"
					" data file %s existed beforehand.\n",
					name);
				return(DB_ERROR);
			}

			if (srv_data_file_is_raw_partition[i] == SRV_OLD_RAW) {
				files[i] = os_file_create(
					name, OS_FILE_OPEN_RAW,
					OS_FILE_NORMAL, OS_DATA_FILE, &ret);
			} else if (i == 0) {
				files[i] = os_file_create(
					name, OS_FILE_OPEN_RETRY,
					OS_FILE_NORMAL, OS_DATA_FILE, &ret);
			} else {
				files[i] = os_file_create(
					name, OS_FILE_OPEN, OS_FILE_NORMAL,
					OS_DATA_FILE, &ret);
			}

			if (!ret) {
				fprintf(stderr,
					"InnoDB: Error in opening %s\n", name);
				os_file_get_last_error(TRUE);

				return(DB_ERROR);
			}

			if (srv_data_file_is_raw_partition[i] == SRV_OLD_RAW) {

				goto skip_size_check;
			}

			ret = os_file_get_size(files[i], &size, &size_high);
			ut_a(ret);
			/* Round size downward to megabytes */

			rounded_size_pages
				= (size / (1024 * 1024) + 4096 * size_high)
					<< (20 - UNIV_PAGE_SIZE_SHIFT);

			if (i == srv_n_data_files - 1
			    && srv_auto_extend_last_data_file) {

				if (srv_data_file_sizes[i] > rounded_size_pages
				    || (srv_last_file_size_max > 0
					&& srv_last_file_size_max
					< rounded_size_pages)) {

					fprintf(stderr,
						"InnoDB: Error: auto-extending"
						" data file %s is"
						" of a different size\n"
						"InnoDB: %lu pages (rounded"
						" down to MB) than specified"
						" in the .cnf file:\n"
						"InnoDB: initial %lu pages,"
						" max %lu (relevant if"
						" non-zero) pages!\n",
						name,
						(ulong) rounded_size_pages,
						(ulong) srv_data_file_sizes[i],
						(ulong)
						srv_last_file_size_max);

					return(DB_ERROR);
				}

				srv_data_file_sizes[i] = rounded_size_pages;
			}

			if (rounded_size_pages != srv_data_file_sizes[i]) {

				fprintf(stderr,
					"InnoDB: Error: data file %s"
					" is of a different size\n"
					"InnoDB: %lu pages"
					" (rounded down to MB)\n"
					"InnoDB: than specified"
					" in the .cnf file %lu pages!\n",
					name,
					(ulong) rounded_size_pages,
					(ulong) srv_data_file_sizes[i]);

				return(DB_ERROR);
			}
skip_size_check:
			fil_read_flushed_lsn_and_arch_log_no(
				files[i], one_opened,
#ifdef UNIV_LOG_ARCHIVE
				min_arch_log_no, max_arch_log_no,
#endif /* UNIV_LOG_ARCHIVE */
				min_flushed_lsn, max_flushed_lsn);
			one_opened = TRUE;
		} else {
			/* We created the data file and now write it full of
			zeros */

			one_created = TRUE;

			if (i > 0) {
				ut_print_timestamp(stderr);
				fprintf(stderr,
					"  InnoDB: Data file %s did not"
					" exist: new to be created\n",
					name);
			} else {
				fprintf(stderr,
					"InnoDB: The first specified"
					" data file %s did not exist:\n"
					"InnoDB: a new database"
					" to be created!\n", name);
				*create_new_db = TRUE;
			}

			ut_print_timestamp(stderr);
			fprintf(stderr,
				"  InnoDB: Setting file %s size to %lu MB\n",
				name,
				(ulong) (srv_data_file_sizes[i]
					 >> (20 - UNIV_PAGE_SIZE_SHIFT)));

			fprintf(stderr,
				"InnoDB: Database physically writes the"
				" file full: wait...\n");

			ret = os_file_set_size(
				name, files[i],
				srv_calc_low32(srv_data_file_sizes[i]),
				srv_calc_high32(srv_data_file_sizes[i]));

			if (!ret) {
				fprintf(stderr,
					"InnoDB: Error in creating %s:"
					" probably out of disk space\n", name);

				return(DB_ERROR);
			}

			*sum_of_new_sizes = *sum_of_new_sizes
				+ srv_data_file_sizes[i];
		}

		ret = os_file_close(files[i]);
		ut_a(ret);

		if (i == 0) {
			fil_space_create(name, 0, 0, FIL_TABLESPACE);
		}

		ut_a(fil_validate());

		fil_node_create(name, srv_data_file_sizes[i], 0,
				srv_data_file_is_raw_partition[i] != 0);
	}

	ios = 0;

	mutex_create(&ios_mutex, SYNC_NO_ORDER_CHECK);

	return(DB_SUCCESS);
}

/****************************************************************//**
Starts InnoDB and creates a new database if database files
are not found and the user wants.
@return	DB_SUCCESS or error code */
UNIV_INTERN
int
innobase_start_or_create_for_mysql(void)
/*====================================*/
{
	buf_pool_t*	ret;
	ibool		create_new_db;
	ibool		log_file_created;
	ibool		log_created	= FALSE;
	ibool		log_opened	= FALSE;
	ib_uint64_t	min_flushed_lsn;
	ib_uint64_t	max_flushed_lsn;
#ifdef UNIV_LOG_ARCHIVE
	ulint		min_arch_log_no;
	ulint		max_arch_log_no;
#endif /* UNIV_LOG_ARCHIVE */
	ulint		sum_of_new_sizes;
	ulint		sum_of_data_file_sizes;
	ulint		tablespace_size_in_header;
	ulint		err;
	ulint		i;
	ulint		io_limit;
	my_bool		srv_file_per_table_original_value
		= srv_file_per_table;
	mtr_t		mtr;
#ifdef HAVE_DARWIN_THREADS
# ifdef F_FULLFSYNC
	/* This executable has been compiled on Mac OS X 10.3 or later.
	Assume that F_FULLFSYNC is available at run-time. */
	srv_have_fullfsync = TRUE;
# else /* F_FULLFSYNC */
	/* This executable has been compiled on Mac OS X 10.2
	or earlier.  Determine if the executable is running
	on Mac OS X 10.3 or later. */
	struct utsname utsname;
	if (uname(&utsname)) {
		fputs("InnoDB: cannot determine Mac OS X version!\n", stderr);
	} else {
		srv_have_fullfsync = strcmp(utsname.release, "7.") >= 0;
	}
	if (!srv_have_fullfsync) {
		fputs("InnoDB: On Mac OS X, fsync() may be"
		      " broken on internal drives,\n"
		      "InnoDB: making transactions unsafe!\n", stderr);
	}
# endif /* F_FULLFSYNC */
#endif /* HAVE_DARWIN_THREADS */

	if (sizeof(ulint) != sizeof(void*)) {
		fprintf(stderr,
			"InnoDB: Error: size of InnoDB's ulint is %lu,"
			" but size of void* is %lu.\n"
			"InnoDB: The sizes should be the same"
			" so that on a 64-bit platform you can\n"
			"InnoDB: allocate more than 4 GB of memory.",
			(ulong)sizeof(ulint), (ulong)sizeof(void*));
	}

	/* System tables are created in tablespace 0.  Thus, we must
	temporarily clear srv_file_per_table.  This is ok, because the
	server will not accept connections (which could modify
	innodb_file_per_table) until this function has returned. */
	srv_file_per_table = FALSE;
#ifdef UNIV_DEBUG
	fprintf(stderr,
		"InnoDB: !!!!!!!! UNIV_DEBUG switched on !!!!!!!!!\n");
#endif

#ifdef UNIV_IBUF_DEBUG
	fprintf(stderr,
		"InnoDB: !!!!!!!! UNIV_IBUF_DEBUG switched on !!!!!!!!!\n"
		"InnoDB: Crash recovery will fail with UNIV_IBUF_DEBUG\n");
#endif

#ifdef UNIV_SYNC_DEBUG
	fprintf(stderr,
		"InnoDB: !!!!!!!! UNIV_SYNC_DEBUG switched on !!!!!!!!!\n");
#endif

#ifdef UNIV_SEARCH_DEBUG
	fprintf(stderr,
		"InnoDB: !!!!!!!! UNIV_SEARCH_DEBUG switched on !!!!!!!!!\n");
#endif

#ifdef UNIV_MEM_DEBUG
	fprintf(stderr,
		"InnoDB: !!!!!!!! UNIV_MEM_DEBUG switched on !!!!!!!!!\n");
#endif

	if (UNIV_LIKELY(srv_use_sys_malloc)) {
		fprintf(stderr,
			"InnoDB: The InnoDB memory heap is disabled\n");
	}

#ifdef HAVE_GCC_ATOMIC_BUILTINS
# ifdef INNODB_RW_LOCKS_USE_ATOMICS
	fprintf(stderr,
		"InnoDB: Mutexes and rw_locks use GCC atomic builtins.\n");
# else /* INNODB_RW_LOCKS_USE_ATOMICS */
	fprintf(stderr,
		"InnoDB: Mutexes use GCC atomic builtins, rw_locks do not.\n");
# endif /* INNODB_RW_LOCKS_USE_ATOMICS */
#elif defined(HAVE_SOLARIS_ATOMICS)
# ifdef INNODB_RW_LOCKS_USE_ATOMICS
	fprintf(stderr,
		"InnoDB: Mutexes and rw_locks use Solaris atomic functions.\n");
# else
	fprintf(stderr,
		"InnoDB: Mutexes use Solaris atomic functions.\n");
# endif /* INNODB_RW_LOCKS_USE_ATOMICS */
#elif HAVE_WINDOWS_ATOMICS
# ifdef INNODB_RW_LOCKS_USE_ATOMICS
	fprintf(stderr,
		"InnoDB: Mutexes and rw_locks use Windows interlocked functions.\n");
# else
	fprintf(stderr,
		"InnoDB: Mutexes use Windows interlocked functions.\n");
# endif /* INNODB_RW_LOCKS_USE_ATOMICS */
#else /* HAVE_GCC_ATOMIC_BUILTINS */
	fprintf(stderr,
		"InnoDB: Neither mutexes nor rw_locks use GCC atomic builtins.\n");
#endif /* HAVE_GCC_ATOMIC_BUILTINS */

	/* Since InnoDB does not currently clean up all its internal data
	structures in MySQL Embedded Server Library server_end(), we
	print an error message if someone tries to start up InnoDB a
	second time during the process lifetime. */

	if (srv_start_has_been_called) {
		fprintf(stderr,
			"InnoDB: Error:startup called second time"
			" during the process lifetime.\n"
			"InnoDB: In the MySQL Embedded Server Library"
			" you cannot call server_init()\n"
			"InnoDB: more than once during"
			" the process lifetime.\n");
	}

	srv_start_has_been_called = TRUE;

#ifdef UNIV_DEBUG
	log_do_write = TRUE;
#endif /* UNIV_DEBUG */
	/*	yydebug = TRUE; */

	srv_is_being_started = TRUE;
	srv_startup_is_before_trx_rollback_phase = TRUE;
	os_aio_use_native_aio = FALSE;

#ifdef __WIN__
	switch (os_get_os_version()) {
	case OS_WIN95:
	case OS_WIN31:
	case OS_WINNT:
		/* On Win 95, 98, ME, Win32 subsystem for Windows 3.1,
		and NT use simulated aio. In NT Windows provides async i/o,
		but when run in conjunction with InnoDB Hot Backup, it seemed
		to corrupt the data files. */

		os_aio_use_native_aio = FALSE;
		break;
	default:
		/* On Win 2000 and XP use async i/o */
		os_aio_use_native_aio = TRUE;
		break;
	}
#endif
	if (srv_file_flush_method_str == NULL) {
		/* These are the default options */

		srv_unix_file_flush_method = SRV_UNIX_FSYNC;

		srv_win_file_flush_method = SRV_WIN_IO_UNBUFFERED;
#ifndef __WIN__
	} else if (0 == ut_strcmp(srv_file_flush_method_str, "fsync")) {
		srv_unix_file_flush_method = SRV_UNIX_FSYNC;

	} else if (0 == ut_strcmp(srv_file_flush_method_str, "O_DSYNC")) {
		srv_unix_file_flush_method = SRV_UNIX_O_DSYNC;

	} else if (0 == ut_strcmp(srv_file_flush_method_str, "O_DIRECT")) {
		srv_unix_file_flush_method = SRV_UNIX_O_DIRECT;

	} else if (0 == ut_strcmp(srv_file_flush_method_str, "littlesync")) {
		srv_unix_file_flush_method = SRV_UNIX_LITTLESYNC;

	} else if (0 == ut_strcmp(srv_file_flush_method_str, "nosync")) {
		srv_unix_file_flush_method = SRV_UNIX_NOSYNC;
#else
	} else if (0 == ut_strcmp(srv_file_flush_method_str, "normal")) {
		srv_win_file_flush_method = SRV_WIN_IO_NORMAL;
		os_aio_use_native_aio = FALSE;

	} else if (0 == ut_strcmp(srv_file_flush_method_str, "unbuffered")) {
		srv_win_file_flush_method = SRV_WIN_IO_UNBUFFERED;
		os_aio_use_native_aio = FALSE;

	} else if (0 == ut_strcmp(srv_file_flush_method_str,
				  "async_unbuffered")) {
		srv_win_file_flush_method = SRV_WIN_IO_UNBUFFERED;
#endif
	} else {
		fprintf(stderr,
			"InnoDB: Unrecognized value %s for"
			" innodb_flush_method\n",
			srv_file_flush_method_str);
		return(DB_ERROR);
	}

	/* Note that the call srv_boot() also changes the values of
	some variables to the units used by InnoDB internally */

	/* Set the maximum number of threads which can wait for a semaphore
	inside InnoDB: this is the 'sync wait array' size, as well as the
	maximum number of threads that can wait in the 'srv_conc array' for
	their time to enter InnoDB. */

#if defined(__NETWARE__)

	/* Create less event semaphores because Win 98/ME had
	difficulty creating 40000 event semaphores.  Comment from
	Novell, Inc.: also, these just take a lot of memory on
	NetWare. */
	srv_max_n_threads = 1000;
#else
	if (srv_buf_pool_size >= 1000 * 1024 * 1024) {
		/* If buffer pool is less than 1000 MB,
		assume fewer threads. */
		srv_max_n_threads = 50000;

	} else if (srv_buf_pool_size >= 8 * 1024 * 1024) {

		srv_max_n_threads = 10000;
	} else {
		srv_max_n_threads = 1000;	/* saves several MB of memory,
						especially in 64-bit
						computers */
	}
#endif
	err = srv_boot();

	if (err != DB_SUCCESS) {

		return((int) err);
	}

	mutex_create(&srv_monitor_file_mutex, SYNC_NO_ORDER_CHECK);

	if (srv_innodb_status) {
		srv_monitor_file_name = mem_alloc(
			strlen(fil_path_to_mysql_datadir)
			+ 20 + sizeof "/innodb_status.");
		sprintf(srv_monitor_file_name, "%s/innodb_status.%lu",
			fil_path_to_mysql_datadir, os_proc_get_number());
		srv_monitor_file = fopen(srv_monitor_file_name, "w+");
		if (!srv_monitor_file) {
			fprintf(stderr, "InnoDB: unable to create %s: %s\n",
				srv_monitor_file_name, strerror(errno));
			return(DB_ERROR);
		}
	} else {
		srv_monitor_file_name = NULL;
		srv_monitor_file = os_file_create_tmpfile();
		if (!srv_monitor_file) {
			return(DB_ERROR);
		}
	}

	mutex_create(&srv_dict_tmpfile_mutex, SYNC_DICT_OPERATION);

	srv_dict_tmpfile = os_file_create_tmpfile();
	if (!srv_dict_tmpfile) {
		return(DB_ERROR);
	}

	mutex_create(&srv_misc_tmpfile_mutex, SYNC_ANY_LATCH);

	srv_misc_tmpfile = os_file_create_tmpfile();
	if (!srv_misc_tmpfile) {
		return(DB_ERROR);
	}

	/* If user has set the value of innodb_file_io_threads then
	we'll emit a message telling the user that this parameter
	is now deprecated. */
	if (srv_n_file_io_threads != 4) {
		fprintf(stderr, "InnoDB: Warning:"
			" innodb_file_io_threads is deprecated."
			" Please use innodb_read_io_threads and"
			" innodb_write_io_threads instead\n");
	}

	/* Now overwrite the value on srv_n_file_io_threads */
	srv_n_file_io_threads = 2 + srv_n_read_io_threads
				+ srv_n_write_io_threads;

	ut_a(srv_n_file_io_threads <= SRV_MAX_N_IO_THREADS);

	/* TODO: Investigate if SRV_N_PENDING_IOS_PER_THREAD (32) limit
	still applies to windows. */
	if (!os_aio_use_native_aio) {
		io_limit = 8 * SRV_N_PENDING_IOS_PER_THREAD;
	} else {
		io_limit = SRV_N_PENDING_IOS_PER_THREAD;
	}

	os_aio_init(io_limit,
		    srv_n_read_io_threads,
		    srv_n_write_io_threads,
		    SRV_MAX_N_PENDING_SYNC_IOS);

	fil_init(srv_file_per_table ? 50000 : 5000,
		 srv_max_n_open_files);

	ret = buf_pool_init();

	if (ret == NULL) {
		fprintf(stderr,
			"InnoDB: Fatal error: cannot allocate the memory"
			" for the buffer pool\n");

		return(DB_ERROR);
	}

#ifdef UNIV_DEBUG
	/* We have observed deadlocks with a 5MB buffer pool but
	the actual lower limit could very well be a little higher. */

	if (srv_buf_pool_size <= 5 * 1024 * 1024) {

		fprintf(stderr, "InnoDB: Warning: Small buffer pool size "
			"(%luM), the flst_validate() debug function "
			"can cause a deadlock if the buffer pool fills up.\n",
			srv_buf_pool_size / 1024 / 1024);
	}
#endif

	fsp_init();
	log_init();

	lock_sys_create(srv_lock_table_size);

	/* Create i/o-handler threads: */

	for (i = 0; i < srv_n_file_io_threads; i++) {
		n[i] = i;

		os_thread_create(io_handler_thread, n + i, thread_ids + i);
	}

#ifdef UNIV_LOG_ARCHIVE
	if (0 != ut_strcmp(srv_log_group_home_dirs[0], srv_arch_dir)) {
		fprintf(stderr,
			"InnoDB: Error: you must set the log group"
			" home dir in my.cnf the\n"
			"InnoDB: same as log arch dir.\n");

		return(DB_ERROR);
	}
#endif /* UNIV_LOG_ARCHIVE */

	if (srv_n_log_files * srv_log_file_size >= 262144) {
		fprintf(stderr,
			"InnoDB: Error: combined size of log files"
			" must be < 4 GB\n");

		return(DB_ERROR);
	}

	sum_of_new_sizes = 0;

	for (i = 0; i < srv_n_data_files; i++) {
#ifndef __WIN__
		if (sizeof(off_t) < 5 && srv_data_file_sizes[i] >= 262144) {
			fprintf(stderr,
				"InnoDB: Error: file size must be < 4 GB"
				" with this MySQL binary\n"
				"InnoDB: and operating system combination,"
				" in some OS's < 2 GB\n");

			return(DB_ERROR);
		}
#endif
		sum_of_new_sizes += srv_data_file_sizes[i];
	}

	if (sum_of_new_sizes < 640) {
		fprintf(stderr,
			"InnoDB: Error: tablespace size must be"
			" at least 10 MB\n");

		return(DB_ERROR);
	}

	err = open_or_create_data_files(&create_new_db,
#ifdef UNIV_LOG_ARCHIVE
					&min_arch_log_no, &max_arch_log_no,
#endif /* UNIV_LOG_ARCHIVE */
					&min_flushed_lsn, &max_flushed_lsn,
					&sum_of_new_sizes);
	if (err != DB_SUCCESS) {
		fprintf(stderr,
			"InnoDB: Could not open or create data files.\n"
			"InnoDB: If you tried to add new data files,"
			" and it failed here,\n"
			"InnoDB: you should now edit innodb_data_file_path"
			" in my.cnf back\n"
			"InnoDB: to what it was, and remove the"
			" new ibdata files InnoDB created\n"
			"InnoDB: in this failed attempt. InnoDB only wrote"
			" those files full of\n"
			"InnoDB: zeros, but did not yet use them in any way."
			" But be careful: do not\n"
			"InnoDB: remove old data files"
			" which contain your precious data!\n");

		return((int) err);
	}

#ifdef UNIV_LOG_ARCHIVE
	srv_normalize_path_for_win(srv_arch_dir);
	srv_arch_dir = srv_add_path_separator_if_needed(srv_arch_dir);
#endif /* UNIV_LOG_ARCHIVE */

	for (i = 0; i < srv_n_log_files; i++) {
		err = open_or_create_log_file(create_new_db, &log_file_created,
					      log_opened, 0, i);
		if (err != DB_SUCCESS) {

			return((int) err);
		}

		if (log_file_created) {
			log_created = TRUE;
		} else {
			log_opened = TRUE;
		}
		if ((log_opened && create_new_db)
		    || (log_opened && log_created)) {
			fprintf(stderr,
				"InnoDB: Error: all log files must be"
				" created at the same time.\n"
				"InnoDB: All log files must be"
				" created also in database creation.\n"
				"InnoDB: If you want bigger or smaller"
				" log files, shut down the\n"
				"InnoDB: database and make sure there"
				" were no errors in shutdown.\n"
				"InnoDB: Then delete the existing log files."
				" Edit the .cnf file\n"
				"InnoDB: and start the database again.\n");

			return(DB_ERROR);
		}
	}

	/* Open all log files and data files in the system tablespace: we
	keep them open until database shutdown */

	fil_open_log_and_system_tablespace_files();

	if (log_created && !create_new_db
#ifdef UNIV_LOG_ARCHIVE
	    && !srv_archive_recovery
#endif /* UNIV_LOG_ARCHIVE */
	    ) {
		if (max_flushed_lsn != min_flushed_lsn
#ifdef UNIV_LOG_ARCHIVE
		    || max_arch_log_no != min_arch_log_no
#endif /* UNIV_LOG_ARCHIVE */
		    ) {
			fprintf(stderr,
				"InnoDB: Cannot initialize created"
				" log files because\n"
				"InnoDB: data files were not in sync"
				" with each other\n"
				"InnoDB: or the data files are corrupt.\n");

			return(DB_ERROR);
		}

		if (max_flushed_lsn < (ib_uint64_t) 1000) {
			fprintf(stderr,
				"InnoDB: Cannot initialize created"
				" log files because\n"
				"InnoDB: data files are corrupt,"
				" or new data files were\n"
				"InnoDB: created when the database"
				" was started previous\n"
				"InnoDB: time but the database"
				" was not shut down\n"
				"InnoDB: normally after that.\n");

			return(DB_ERROR);
		}

		mutex_enter(&(log_sys->mutex));

#ifdef UNIV_LOG_ARCHIVE
		/* Do not + 1 arch_log_no because we do not use log
		archiving */
		recv_reset_logs(max_flushed_lsn, max_arch_log_no, TRUE);
#else
		recv_reset_logs(max_flushed_lsn, TRUE);
#endif /* UNIV_LOG_ARCHIVE */

		mutex_exit(&(log_sys->mutex));
	}

	trx_sys_file_format_init();

	if (create_new_db) {
		mtr_start(&mtr);
		fsp_header_init(0, sum_of_new_sizes, &mtr);

		mtr_commit(&mtr);

		trx_sys_create();
		dict_create();
		srv_startup_is_before_trx_rollback_phase = FALSE;

#ifdef UNIV_LOG_ARCHIVE
	} else if (srv_archive_recovery) {
		fprintf(stderr,
			"InnoDB: Starting archive"
			" recovery from a backup...\n");
		err = recv_recovery_from_archive_start(
			min_flushed_lsn, srv_archive_recovery_limit_lsn,
			min_arch_log_no);
		if (err != DB_SUCCESS) {

			return(DB_ERROR);
		}
		/* Since ibuf init is in dict_boot, and ibuf is needed
		in any disk i/o, first call dict_boot */

		dict_boot();
		trx_sys_init_at_db_start();
		srv_startup_is_before_trx_rollback_phase = FALSE;

		/* Initialize the fsp free limit global variable in the log
		system */
		fsp_header_get_free_limit();

		recv_recovery_from_archive_finish();
#endif /* UNIV_LOG_ARCHIVE */
	} else {

		/* Check if we support the max format that is stamped
		on the system tablespace. 
		Note:  We are NOT allowed to make any modifications to
		the TRX_SYS_PAGE_NO page before recovery  because this
		page also contains the max_trx_id etc. important system
		variables that are required for recovery.  We need to
		ensure that we return the system to a state where normal
		recovery is guaranteed to work. We do this by
		invalidating the buffer cache, this will force the
		reread of the page and restoration to its last known
		consistent state, this is REQUIRED for the recovery
		process to work. */
		err = trx_sys_file_format_max_check(
			srv_check_file_format_at_startup);

		if (err != DB_SUCCESS) {
			return(err);
		}

		/* Invalidate the buffer pool to ensure that we reread
		the page that we read above, during recovery.
		Note that this is not as heavy weight as it seems. At
		this point there will be only ONE page in the buf_LRU
		and there must be no page in the buf_flush list. */
		buf_pool_invalidate();

		/* We always try to do a recovery, even if the database had
		been shut down normally: this is the normal startup path */

		err = recv_recovery_from_checkpoint_start(LOG_CHECKPOINT,
							  IB_ULONGLONG_MAX,
							  min_flushed_lsn,
							  max_flushed_lsn);
		if (err != DB_SUCCESS) {

			return(DB_ERROR);
		}

		/* Since the insert buffer init is in dict_boot, and the
		insert buffer is needed in any disk i/o, first we call
		dict_boot(). Note that trx_sys_init_at_db_start() only needs
		to access space 0, and the insert buffer at this stage already
		works for space 0. */

		dict_boot();
		trx_sys_init_at_db_start();

		if (srv_force_recovery < SRV_FORCE_NO_IBUF_MERGE) {
			/* The following call is necessary for the insert
			buffer to work with multiple tablespaces. We must
			know the mapping between space id's and .ibd file
			names.

			In a crash recovery, we check that the info in data
			dictionary is consistent with what we already know
			about space id's from the call of
			fil_load_single_table_tablespaces().

			In a normal startup, we create the space objects for
			every table in the InnoDB data dictionary that has
			an .ibd file.

			We also determine the maximum tablespace id used.

			TODO: We may have incomplete transactions in the
			data dictionary tables. Does that harm the scanning of
			the data dictionary below? */

			dict_check_tablespaces_and_store_max_id(
				recv_needed_recovery);
		}

		srv_startup_is_before_trx_rollback_phase = FALSE;

		/* Initialize the fsp free limit global variable in the log
		system */
		fsp_header_get_free_limit();

		/* recv_recovery_from_checkpoint_finish needs trx lists which
		are initialized in trx_sys_init_at_db_start(). */

		recv_recovery_from_checkpoint_finish();

		/* It is possible that file_format tag has never
		been set. In this case we initialize it to minimum
		value.  Important to note that we can do it ONLY after
		we have finished the recovery process so that the
		image of TRX_SYS_PAGE_NO is not stale. */
		trx_sys_file_format_tag_init();
	}

	if (!create_new_db && sum_of_new_sizes > 0) {
		/* New data file(s) were added */
		mtr_start(&mtr);

		fsp_header_inc_size(0, sum_of_new_sizes, &mtr);

		mtr_commit(&mtr);

		/* Immediately write the log record about increased tablespace
		size to disk, so that it is durable even if mysqld would crash
		quickly */

		log_buffer_flush_to_disk();
	}

#ifdef UNIV_LOG_ARCHIVE
	/* Archiving is always off under MySQL */
	if (!srv_log_archive_on) {
		ut_a(DB_SUCCESS == log_archive_noarchivelog());
	} else {
		mutex_enter(&(log_sys->mutex));

		start_archive = FALSE;

		if (log_sys->archiving_state == LOG_ARCH_OFF) {
			start_archive = TRUE;
		}

		mutex_exit(&(log_sys->mutex));

		if (start_archive) {
			ut_a(DB_SUCCESS == log_archive_archivelog());
		}
	}
#endif /* UNIV_LOG_ARCHIVE */

	/* fprintf(stderr, "Max allowed record size %lu\n",
	page_get_free_space_of_empty() / 2); */

	/* Create the thread which watches the timeouts for lock waits
	and prints InnoDB monitor info */

	os_thread_create(&srv_lock_timeout_and_monitor_thread, NULL,
			 thread_ids + 2 + SRV_MAX_N_IO_THREADS);

	/* Create the thread which warns of long semaphore waits */
	os_thread_create(&srv_error_monitor_thread, NULL,
			 thread_ids + 3 + SRV_MAX_N_IO_THREADS);
	srv_is_being_started = FALSE;

	if (trx_doublewrite == NULL) {
		/* Create the doublewrite buffer to a new tablespace */

		trx_sys_create_doublewrite_buf();
	}

	err = dict_create_or_check_foreign_constraint_tables();

	if (err != DB_SUCCESS) {
		return((int)DB_ERROR);
	}

	/* Create the master thread which does purge and other utility
	operations */

	os_thread_create(&srv_master_thread, NULL, thread_ids
			 + (1 + SRV_MAX_N_IO_THREADS));
#ifdef UNIV_DEBUG
	/* buf_debug_prints = TRUE; */
#endif /* UNIV_DEBUG */
	sum_of_data_file_sizes = 0;

	for (i = 0; i < srv_n_data_files; i++) {
		sum_of_data_file_sizes += srv_data_file_sizes[i];
	}

	tablespace_size_in_header = fsp_header_get_tablespace_size();

	if (!srv_auto_extend_last_data_file
	    && sum_of_data_file_sizes != tablespace_size_in_header) {

		fprintf(stderr,
			"InnoDB: Error: tablespace size"
			" stored in header is %lu pages, but\n"
			"InnoDB: the sum of data file sizes is %lu pages\n",
			(ulong) tablespace_size_in_header,
			(ulong) sum_of_data_file_sizes);

		if (srv_force_recovery == 0
		    && sum_of_data_file_sizes < tablespace_size_in_header) {
			/* This is a fatal error, the tail of a tablespace is
			missing */

			fprintf(stderr,
				"InnoDB: Cannot start InnoDB."
				" The tail of the system tablespace is\n"
				"InnoDB: missing. Have you edited"
				" innodb_data_file_path in my.cnf in an\n"
				"InnoDB: inappropriate way, removing"
				" ibdata files from there?\n"
				"InnoDB: You can set innodb_force_recovery=1"
				" in my.cnf to force\n"
				"InnoDB: a startup if you are trying"
				" to recover a badly corrupt database.\n");

			return(DB_ERROR);
		}
	}

	if (srv_auto_extend_last_data_file
	    && sum_of_data_file_sizes < tablespace_size_in_header) {

		fprintf(stderr,
			"InnoDB: Error: tablespace size stored in header"
			" is %lu pages, but\n"
			"InnoDB: the sum of data file sizes"
			" is only %lu pages\n",
			(ulong) tablespace_size_in_header,
			(ulong) sum_of_data_file_sizes);

		if (srv_force_recovery == 0) {

			fprintf(stderr,
				"InnoDB: Cannot start InnoDB. The tail of"
				" the system tablespace is\n"
				"InnoDB: missing. Have you edited"
				" innodb_data_file_path in my.cnf in an\n"
				"InnoDB: inappropriate way, removing"
				" ibdata files from there?\n"
				"InnoDB: You can set innodb_force_recovery=1"
				" in my.cnf to force\n"
				"InnoDB: a startup if you are trying to"
				" recover a badly corrupt database.\n");

			return(DB_ERROR);
		}
	}

	/* Check that os_fast_mutexes work as expected */
	os_fast_mutex_init(&srv_os_test_mutex);

	if (0 != os_fast_mutex_trylock(&srv_os_test_mutex)) {
		fprintf(stderr,
			"InnoDB: Error: pthread_mutex_trylock returns"
			" an unexpected value on\n"
			"InnoDB: success! Cannot continue.\n");
		exit(1);
	}

	os_fast_mutex_unlock(&srv_os_test_mutex);

	os_fast_mutex_lock(&srv_os_test_mutex);

	os_fast_mutex_unlock(&srv_os_test_mutex);

	os_fast_mutex_free(&srv_os_test_mutex);

	if (srv_print_verbose_log) {
		ut_print_timestamp(stderr);
		fprintf(stderr,
			" InnoDB Plugin %s started; "
			"log sequence number %llu\n",
			INNODB_VERSION_STR, srv_start_lsn);
	}

	if (srv_force_recovery > 0) {
		fprintf(stderr,
			"InnoDB: !!! innodb_force_recovery"
			" is set to %lu !!!\n",
			(ulong) srv_force_recovery);
	}

	fflush(stderr);

	if (trx_doublewrite_must_reset_space_ids) {
		/* Actually, we did not change the undo log format between
		4.0 and 4.1.1, and we would not need to run purge to
		completion. Note also that the purge algorithm in 4.1.1
		can process the the history list again even after a full
		purge, because our algorithm does not cut the end of the
		history list in all cases so that it would become empty
		after a full purge. That mean that we may purge 4.0 type
		undo log even after this phase.

		The insert buffer record format changed between 4.0 and
		4.1.1. It is essential that the insert buffer is emptied
		here! */

		fprintf(stderr,
			"InnoDB: You are upgrading to an"
			" InnoDB version which allows multiple\n"
			"InnoDB: tablespaces. Wait that purge"
			" and insert buffer merge run to\n"
			"InnoDB: completion...\n");
		for (;;) {
			os_thread_sleep(1000000);

			if (0 == strcmp(srv_main_thread_op_info,
					"waiting for server activity")) {

				ut_a(ibuf_is_empty());

				break;
			}
		}
		fprintf(stderr,
			"InnoDB: Full purge and insert buffer merge"
			" completed.\n");

		trx_sys_mark_upgraded_to_multiple_tablespaces();

		fprintf(stderr,
			"InnoDB: You have now successfully upgraded"
			" to the multiple tablespaces\n"
			"InnoDB: format. You should NOT DOWNGRADE"
			" to an earlier version of\n"
			"InnoDB: InnoDB! But if you absolutely need to"
			" downgrade, see\n"
			"InnoDB: " REFMAN "multiple-tablespaces.html\n"
			"InnoDB: for instructions.\n");
	}

	if (srv_force_recovery == 0) {
		/* In the insert buffer we may have even bigger tablespace
		id's, because we may have dropped those tablespaces, but
		insert buffer merge has not had time to clean the records from
		the ibuf tree. */

		ibuf_update_max_tablespace_id();
	}

	srv_file_per_table = srv_file_per_table_original_value;

	srv_was_started = TRUE;

	return((int) DB_SUCCESS);
}

/****************************************************************//**
Shuts down the InnoDB database.
@return	DB_SUCCESS or error code */
UNIV_INTERN
int
innobase_shutdown_for_mysql(void)
/*=============================*/
{
	ulint	i;
#ifdef __NETWARE__
	extern ibool panic_shutdown;
#endif
	if (!srv_was_started) {
		if (srv_is_being_started) {
			ut_print_timestamp(stderr);
			fprintf(stderr,
				"  InnoDB: Warning: shutting down"
				" a not properly started\n"
				"InnoDB: or created database!\n");
		}

		return(DB_SUCCESS);
	}

	/* 1. Flush the buffer pool to disk, write the current lsn to
	the tablespace header(s), and copy all log data to archive.
	The step 1 is the real InnoDB shutdown. The remaining steps 2 - ...
	just free data structures after the shutdown. */


	if (srv_fast_shutdown == 2) {
		ut_print_timestamp(stderr);
		fprintf(stderr,
			"  InnoDB: MySQL has requested a very fast shutdown"
			" without flushing "
			"the InnoDB buffer pool to data files."
			" At the next mysqld startup "
			"InnoDB will do a crash recovery!\n");
	}

#ifdef __NETWARE__
	if (!panic_shutdown)
#endif
		logs_empty_and_mark_files_at_shutdown();

	if (srv_conc_n_threads != 0) {
		fprintf(stderr,
			"InnoDB: Warning: query counter shows %ld queries"
			" still\n"
			"InnoDB: inside InnoDB at shutdown\n",
			srv_conc_n_threads);
	}

	/* 2. Make all threads created by InnoDB to exit */

	srv_shutdown_state = SRV_SHUTDOWN_EXIT_THREADS;

	/* In a 'very fast' shutdown, we do not need to wait for these threads
	to die; all which counts is that we flushed the log; a 'very fast'
	shutdown is essentially a crash. */

	if (srv_fast_shutdown == 2) {
		return(DB_SUCCESS);
	}

	/* All threads end up waiting for certain events. Put those events
	to the signaled state. Then the threads will exit themselves in
	os_thread_event_wait(). */

	for (i = 0; i < 1000; i++) {
		/* NOTE: IF YOU CREATE THREADS IN INNODB, YOU MUST EXIT THEM
		HERE OR EARLIER */

		/* a. Let the lock timeout thread exit */
		os_event_set(srv_lock_timeout_thread_event);

		/* b. srv error monitor thread exits automatically, no need
		to do anything here */

		/* c. We wake the master thread so that it exits */
		srv_wake_master_thread();

		/* d. Exit the i/o threads */

		os_aio_wake_all_threads_at_shutdown();

		os_mutex_enter(os_sync_mutex);

		if (os_thread_count == 0) {
			/* All the threads have exited or are just exiting;
			NOTE that the threads may not have completed their
			exit yet. Should we use pthread_join() to make sure
			they have exited? Now we just sleep 0.1 seconds and
			hope that is enough! */

			os_mutex_exit(os_sync_mutex);

			os_thread_sleep(100000);

			break;
		}

		os_mutex_exit(os_sync_mutex);

		os_thread_sleep(100000);
	}

	if (i == 1000) {
		fprintf(stderr,
			"InnoDB: Warning: %lu threads created by InnoDB"
			" had not exited at shutdown!\n",
			(ulong) os_thread_count);
	}

	if (srv_monitor_file) {
		fclose(srv_monitor_file);
		srv_monitor_file = 0;
		if (srv_monitor_file_name) {
			unlink(srv_monitor_file_name);
			mem_free(srv_monitor_file_name);
		}
	}
	if (srv_dict_tmpfile) {
		fclose(srv_dict_tmpfile);
		srv_dict_tmpfile = 0;
	}

	if (srv_misc_tmpfile) {
		fclose(srv_misc_tmpfile);
		srv_misc_tmpfile = 0;
	}

	trx_sys_file_format_close();

	mutex_free(&srv_monitor_file_mutex);
	mutex_free(&srv_dict_tmpfile_mutex);
	mutex_free(&srv_misc_tmpfile_mutex);

	/* 3. Free all InnoDB's own mutexes and the os_fast_mutexes inside
	them */
	sync_close();

	/* 4. Free the os_conc_mutex and all os_events and os_mutexes */

	srv_free();
	os_sync_free();

	/* Check that all read views are closed except read view owned
	by a purge. */

	if (UT_LIST_GET_LEN(trx_sys->view_list) > 1) {
		fprintf(stderr,
			"InnoDB: Error: all read views were not closed"
			" before shutdown:\n"
			"InnoDB: %lu read views open \n",
			UT_LIST_GET_LEN(trx_sys->view_list) - 1);
	}

	/* 5. Free all allocated memory and the os_fast_mutex created in
	ut0mem.c */

	buf_pool_free();
	ut_free_all_mem();

	if (os_thread_count != 0
	    || os_event_count != 0
	    || os_mutex_count != 0
	    || os_fast_mutex_count != 0) {
		fprintf(stderr,
			"InnoDB: Warning: some resources were not"
			" cleaned up in shutdown:\n"
			"InnoDB: threads %lu, events %lu,"
			" os_mutexes %lu, os_fast_mutexes %lu\n",
			(ulong) os_thread_count, (ulong) os_event_count,
			(ulong) os_mutex_count, (ulong) os_fast_mutex_count);
	}

	if (dict_foreign_err_file) {
		fclose(dict_foreign_err_file);
	}
	if (lock_latest_err_file) {
		fclose(lock_latest_err_file);
	}

	if (srv_print_verbose_log) {
		ut_print_timestamp(stderr);
		fprintf(stderr,
			"  InnoDB: Shutdown completed;"
			" log sequence number %llu\n",
			srv_shutdown_lsn);
	}

	srv_was_started = FALSE;

	return((int) DB_SUCCESS);
}

#ifdef __NETWARE__
void set_panic_flag_for_netware()
{
	extern ibool panic_shutdown;
	panic_shutdown = TRUE;
}
#endif /* __NETWARE__ */
#endif /* !UNIV_HOTBACKUP */