innobase/fsp/fsp0sysspace.cc

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

Copyright (c) 2013, 2016, Oracle and/or its affiliates. All Rights Reserved.

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

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

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

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

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

/**************************************************//**
@file fsp/fsp0space.cc
Multi file, shared, system tablespace implementation.

Created 2012-11-16 by Sunny Bains as srv/srv0space.cc
Refactored 2013-7-26 by Kevin Lewis
*******************************************************/

#include "ha_prototypes.h"

#include "fsp0sysspace.h"
#include "srv0start.h"
#include "trx0sys.h"
#ifndef UNIV_HOTBACKUP
#include "dict0load.h"
#include "mem0mem.h"
#include "os0file.h"
#include "row0mysql.h"
#include "ut0new.h"

/** The server header file is included to access opt_initialize global variable.
If server passes the option for create/open DB to SE, we should remove such
direct reference to server header and global variable */
#include "mysqld.h"
#else
my_bool opt_initialize = 0;
#endif /* !UNIV_HOTBACKUP */

/** The control info of the system tablespace. */
SysTablespace srv_sys_space;

/** The control info of a temporary table shared tablespace. */
SysTablespace srv_tmp_space;

/** If the last data file is auto-extended, we add this many pages to it
at a time. We have to make this public because it is a config variable. */
ulong sys_tablespace_auto_extend_increment;

#ifdef UNIV_DEBUG
/** Control if extra debug checks need to be done for temporary tablespace.
Default = true that is disable such checks.
This variable is not exposed to end-user but still kept as variable for
developer to enable it during debug. */
bool srv_skip_temp_table_checks_debug = true;
#endif /* UNIV_DEBUG */

/** Convert a numeric string that optionally ends in G or M or K,
    to a number containing megabytes.
@param[in]	str	String with a quantity in bytes
@param[out]	megs	The number in megabytes
@return next character in string */
char*
SysTablespace::parse_units(
	char*	ptr,
	ulint*	megs)
{
	char*		endp;

	*megs = strtoul(ptr, &endp, 10);

	ptr = endp;

	switch (*ptr) {
	case 'G': case 'g':
		*megs *= 1024;
		/* fall through */
	case 'M': case 'm':
		++ptr;
		break;
	case 'K': case 'k':
		*megs /= 1024;
		++ptr;
		break;
	default:
		*megs /= 1024 * 1024;
		break;
	}

	return(ptr);
}

/** Parse the input params and populate member variables.
@param[in]	filepath	path to data files
@param[in]	supports_raw	true if the tablespace supports raw devices
@return true on success parse */
bool
SysTablespace::parse_params(
	const char*	filepath_spec,
	bool		supports_raw,
	bool		filenames_only)
{
	char*	filepath;
	ulint	size;
	char*	input_str;
	ulint	n_files = 0;

	ut_ad(m_last_file_size_max == 0);
	ut_ad(!m_auto_extend_last_file);

	char*	new_str = mem_strdup(filepath_spec);
	char*	str = new_str;

	input_str = str;

	/*---------------------- PASS 1 ---------------------------*/
	/* First calculate the number of data files and check syntax:
	filepath:size[K |M | G];filepath:size[K |M | G]... .
	Note that a Windows path may contain a drive name and a ':'. */
	while (*str != '\0') {
		filepath = str;

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

		if (*str == '\0') {
			ut_free(new_str);

			ib::error()
				<< "syntax error in file path or size"
				" specified is less than 1 megabyte";
			return(false);
		}

		str++;

		str = parse_units(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 = parse_units(str, &size);
			}

			if (*str != '\0') {
				ut_free(new_str);
				ib::error()
					<< "syntax error in file path or"
					<< " size specified is less than"
					<< " 1 megabyte";
				return(false);
			}
		}

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

			if (!supports_raw) {
				ib::error()
					<< "Tablespace doesn't support raw"
					" devices";
				ut_free(new_str);
				return(false);
			}

			str += 3;
		}

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

			if (!supports_raw) {
				ib::error()
					<< "Tablespace doesn't support raw"
					" devices";
				ut_free(new_str);
				return(false);
			}
		}

		if (size == 0) {

			ut_free(new_str);

			ib::error()
				<< "syntax error in file path or size"
				" specified is less than 1 megabyte";

			return(false);
		}

		++n_files;

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

			ib::error()
				<< "syntax error in file path or size"
				" specified is less than 1 megabyte";
			return(false);
		}
	}

	if (n_files == 0) {

		/* filepath_spec must contain at least one data file
		definition */

		ut_free(new_str);

		ib::error()
			<< "syntax error in file path or size specified"
			" is less than 1 megabyte";

		return(false);
	}

	/*---------------------- PASS 2 ---------------------------*/
	/* Then store the actual values to our arrays */
	str = input_str;
	ulint order = 0;

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

		/* XtraBackup needs only file names on prepare */
		if (filenames_only) {
			char*	p;

			for (p = str; *p && *p != ';'; p++) {
				if (*p == OS_PATH_SEPARATOR) {
					str = filepath = p + 1;
				}
			}
		}

		/* Note that we must step over the ':' in a Windows filepath;
		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 filepath a null-terminated string */
			*str = '\0';
			str++;
		}

		str = parse_units(str, &size);

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

			m_auto_extend_last_file = true;

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

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

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

				str = parse_units(str, &m_last_file_size_max);
			}

			if (*str != '\0') {
				ut_free(new_str);
				ib::error() << "syntax error in file path or"
					" size specified is less than 1"
					" megabyte";
				return(false);
			}
		}

		m_files.push_back(Datafile(filepath, flags(), size, order));
		Datafile* datafile = &m_files.back();
		datafile->make_filepath(path(), filepath, NO_EXT);

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

			ut_a(supports_raw);

			str += 3;

			/* Initialize new raw device only during initialize */
			m_files.back().m_type =
			opt_initialize ? SRV_NEW_RAW : SRV_OLD_RAW;
		}

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

			ut_a(supports_raw);

			str += 3;

			/* Initialize new raw device only during initialize */
			if (m_files.back().m_type == SRV_NOT_RAW) {
				m_files.back().m_type =
				opt_initialize ? SRV_NEW_RAW : SRV_OLD_RAW;
			}
		}

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

	ut_ad(n_files == ulint(m_files.size()));

	ut_free(new_str);

	return(true);
}

/** Frees the memory allocated by the parse method. */
void
SysTablespace::shutdown()
{
	Tablespace::shutdown();

	m_auto_extend_last_file = 0;
	m_last_file_size_max = 0;
	m_created_new_raw = 0;
	m_is_tablespace_full = false;
	m_sanity_checks_done = false;
}

/** Verify the size of the physical file.
@param[in]	file	data file object
@return DB_SUCCESS if OK else error code. */
dberr_t
SysTablespace::check_size(
	Datafile&	file)
{
	os_offset_t	size = os_file_get_size(file.m_handle);
	ut_a(size != (os_offset_t) -1);

	/* Under some error conditions like disk full scenarios
	or file size reaching filesystem limit the data file
	could contain an incomplete extent at the end. When we
	extend a data file and if some failure happens, then
	also the data file could contain an incomplete extent.
	So we need to round the size downward to a  megabyte.*/

	ulint	rounded_size_pages = get_pages_from_size(size);

	/* If last file */
	if (&file == &m_files.back() && m_auto_extend_last_file) {

		if (file.m_size > rounded_size_pages
		    || (m_last_file_size_max > 0
			&& m_last_file_size_max < rounded_size_pages)) {
			ib::error() << "The Auto-extending " << name()
				<< " data file '" << file.filepath() << "' is"
				" of a different size " << rounded_size_pages
				<< " pages (rounded down to MB) than specified"
				" in the .cnf file: initial " << file.m_size
				<< " pages, max " << m_last_file_size_max
				<< " (relevant if non-zero) pages!";
			return(DB_ERROR);
		}

		file.m_size = rounded_size_pages;
	}

	if (rounded_size_pages != file.m_size) {
		ib::error() << "The " << name() << " data file '"
			<< file.filepath() << "' is of a different size "
			<< rounded_size_pages << " pages (rounded down to MB)"
			" than the " << file.m_size << " pages specified in"
			" the .cnf file!";
		return(DB_ERROR);
	}

	return(DB_SUCCESS);
}

/** Set the size of the file.
@param[in]	file	data file object
@return DB_SUCCESS or error code */
dberr_t
SysTablespace::set_size(
	Datafile&	file)
{
	ut_a(!srv_read_only_mode || m_ignore_read_only);

	/* We created the data file and now write it full of zeros */
	ib::info() << "Setting file '" << file.filepath() << "' size to "
		<< (file.m_size >> (20 - UNIV_PAGE_SIZE_SHIFT)) << " MB."
		" Physically writing the file full; Please wait ...";

	bool	success = os_file_set_size(
		file.m_filepath, file.m_handle,
		static_cast<os_offset_t>(file.m_size << UNIV_PAGE_SIZE_SHIFT),
		m_ignore_read_only ? false : srv_read_only_mode);

	if (success) {
		ib::info() << "File '" << file.filepath() << "' size is now "
			<< (file.m_size >> (20 - UNIV_PAGE_SIZE_SHIFT))
			<< " MB.";
	} else {
		ib::error() << "Could not set the file size of '"
			<< file.filepath() << "'. Probably out of disk space";

		return(DB_ERROR);
	}

	return(DB_SUCCESS);
}

/** Create a data file.
@param[in]	file	data file object
@return DB_SUCCESS or error code */
dberr_t
SysTablespace::create_file(
	Datafile&	file)
{
	dberr_t	err = DB_SUCCESS;

	ut_a(!file.m_exists);
	ut_a(!srv_read_only_mode || m_ignore_read_only);

	switch (file.m_type) {
	case SRV_NEW_RAW:

		/* The partition is opened, not created; then it is
		written over */
		m_created_new_raw = true;

		/* Fall through. */

	case SRV_OLD_RAW:

		srv_start_raw_disk_in_use = TRUE;

		/* Fall through. */

	case SRV_NOT_RAW:
		err = file.open_or_create(
			m_ignore_read_only ? false : srv_read_only_mode);
		break;
	}


	if (err == DB_SUCCESS && file.m_type != SRV_OLD_RAW) {
		err = set_size(file);
	}

	return(err);
}

/** Open a data file.
@param[in]	file	data file object
@return DB_SUCCESS or error code */
dberr_t
SysTablespace::open_file(
	Datafile&	file)
{
	dberr_t	err = DB_SUCCESS;

	ut_a(file.m_exists);

	switch (file.m_type) {
	case SRV_NEW_RAW:
		/* The partition is opened, not created; then it is
		written over */
		m_created_new_raw = true;

		/* Fall through */

	case SRV_OLD_RAW:
		srv_start_raw_disk_in_use = TRUE;

		if (srv_read_only_mode && !m_ignore_read_only) {
			ib::error() << "Can't open a raw device '"
				<< file.m_filepath << "' when"
				" --innodb-read-only is set";

			return(DB_ERROR);
		}

		/* Fall through */

	case SRV_NOT_RAW:
		err = file.open_or_create(
			m_ignore_read_only ? false : srv_read_only_mode);

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

	switch (file.m_type) {
	case SRV_NEW_RAW:
		/* Set file size for new raw device. */
		err = set_size(file);
		break;

	case SRV_NOT_RAW:
		/* Check file size for existing file. */
		err = check_size(file);
		break;

	case SRV_OLD_RAW:
		err = DB_SUCCESS;
		break;

	}

	if (err != DB_SUCCESS) {
		file.close();
	}

	return(err);
}

#ifndef UNIV_HOTBACKUP
/** Check the tablespace header for this tablespace.
@param[out]	flushed_lsn	the value of FIL_PAGE_FILE_FLUSH_LSN
@return DB_SUCCESS or error code */
dberr_t
SysTablespace::read_lsn_and_check_flags(lsn_t* flushed_lsn)
{
	dberr_t	err;

	/* Only relevant for the system tablespace. */
	ut_ad(space_id() == TRX_SYS_SPACE);

	files_t::iterator it = m_files.begin();

	ut_a(it->m_exists);

	if (it->m_handle.m_file == OS_FILE_CLOSED) {

		err = it->open_or_create(
			m_ignore_read_only ?  false : srv_read_only_mode);

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

	err = it->read_first_page(
		m_ignore_read_only ?  false : srv_read_only_mode);

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

	ut_a(it->order() == 0);

	/* XtraBackup never loads corrupted pages from
	the doublewrite buffer */
	buf_dblwr_init_or_load_pages(it->handle(), it->filepath(), false);

	/* Check the contents of the first page of the
	first datafile. */
	for (int retry = 0; retry < 2; ++retry) {

		err = it->validate_first_page(flushed_lsn, false);

		if (err != DB_SUCCESS
		    && (retry == 1
			/* never restore from doublewrite */
#if 0
			|| it->restore_from_doublewrite(0) != DB_SUCCESS
#endif
		    )) {

			it->close();

			return(err);
		}
	}

	/* Make sure the tablespace space ID matches the
	space ID on the first page of the first datafile. */
	if (space_id() != it->m_space_id) {

		ib::error()
			<< "The " << name() << " data file '" << it->name()
			<< "' has the wrong space ID. It should be "
			<< space_id() << ", but " << it->m_space_id
			<< " was found";

		it->close();

		return(err);
	}

	it->close();

	return(DB_SUCCESS);
}
#endif /* !UNIV_HOTBACKUP */
/** Check if a file can be opened in the correct mode.
@param[in]	file	data file object
@param[out]	reason	exact reason if file_status check failed.
@return DB_SUCCESS or error code. */
dberr_t
SysTablespace::check_file_status(
	const Datafile&		file,
	file_status_t&		reason)
{
	os_file_stat_t	stat;

	memset(&stat, 0x0, sizeof(stat));

	dberr_t	err = os_file_get_status(
		file.m_filepath, &stat, true,
		m_ignore_read_only ? false : srv_read_only_mode);

	reason = FILE_STATUS_VOID;
	/* File exists but we can't read the rw-permission settings. */
	switch (err) {
	case DB_FAIL:
		ib::error() << "os_file_get_status() failed on '"
			<< file.filepath()
			<< "'. Can't determine file permissions";
		err = DB_ERROR;
		reason = FILE_STATUS_RW_PERMISSION_ERROR;
		break;

	case DB_SUCCESS:

		/* Note: stat.rw_perm is only valid for "regular" files */

		if (stat.type == OS_FILE_TYPE_FILE) {

			if (!stat.rw_perm) {
				const char	*p = (!srv_read_only_mode
						      || m_ignore_read_only)
						     ? "writable"
						     : "readable";

				ib::error() << "The " << name() << " data file"
					<< " '" << file.name() << "' must be "
					<< p;

				err = DB_ERROR;
				reason = FILE_STATUS_READ_WRITE_ERROR;
			}

		} else {
			/* Not a regular file, bail out. */
			ib::error() << "The " << name() << " data file '"
				<< file.name() << "' is not a regular"
				" InnoDB data file.";

			err = DB_ERROR;
			reason = FILE_STATUS_NOT_REGULAR_FILE_ERROR;
		}
		break;

	case DB_NOT_FOUND:
		break;

	default:
		ut_ad(0);
	}

	return(err);
}

/** Note that the data file was not found.
@param[in]	file		data file object
@param[out]	create_new_db	true if a new instance to be created
@return DB_SUCESS or error code */
dberr_t
SysTablespace::file_not_found(
	Datafile&	file,
	bool*	create_new_db)
{
	file.m_exists = false;

	if (srv_read_only_mode && !m_ignore_read_only) {
		ib::error() << "Can't create file '" << file.filepath()
			<< "' when --innodb-read-only is set";

		return(DB_ERROR);

	} else if (&file == &m_files.front()) {

		/* First data file. */
		ut_a(!*create_new_db);
		*create_new_db = TRUE;

		if (space_id() == TRX_SYS_SPACE) {
			ib::info() << "The first " << name() << " data file '"
				<< file.name() << "' did not exist."
				" A new tablespace will be created!";
		}

	} else {
		ib::info() << "Need to create a new " << name()
			<< " data file '" << file.name() << "'.";
	}

	/* Set the file create mode. */
	switch (file.m_type) {
	case SRV_NOT_RAW:
		file.set_open_flags(OS_FILE_CREATE);
		break;

	case SRV_NEW_RAW:
	case SRV_OLD_RAW:
		file.set_open_flags(OS_FILE_OPEN_RAW);
		break;
	}

	return(DB_SUCCESS);
}

/** Note that the data file was found.
@param[in,out]	file	data file object
@return true if a new instance to be created */
bool
SysTablespace::file_found(
	Datafile&	file)
{
	/* Note that the file exists and can be opened
	in the appropriate mode. */
	file.m_exists = true;

	/* Set the file open mode */
	switch (file.m_type) {
	case SRV_NOT_RAW:
		file.set_open_flags(
			&file == &m_files.front()
			? OS_FILE_OPEN_RETRY : OS_FILE_OPEN);
		break;

	case SRV_NEW_RAW:
	case SRV_OLD_RAW:
		file.set_open_flags(OS_FILE_OPEN_RAW);
		break;
	}

	/* Need to create the system tablespace for new raw device. */
	return(file.m_type == SRV_NEW_RAW);
}
#ifndef UNIV_HOTBACKUP
/** Check the data file specification.
@param[out] create_new_db	true if a new database is to be created
@param[in] min_expected_size	Minimum expected tablespace size in bytes
@return DB_SUCCESS if all OK else error code */
dberr_t
SysTablespace::check_file_spec(
	bool*	create_new_db,
	ulint	min_expected_size)
{
	*create_new_db = FALSE;

	if (m_files.size() >= 1000) {
		ib::error() << "There must be < 1000 data files in "
			<< name() << " but " << m_files.size() << " have been"
			" defined.";

		return(DB_ERROR);
	}

	if (get_sum_of_sizes() < min_expected_size / UNIV_PAGE_SIZE) {

		ib::error() << "Tablespace size must be at least "
			<< min_expected_size / (1024 * 1024) << " MB";

		return(DB_ERROR);
	}

	dberr_t	err = DB_SUCCESS;

	ut_a(!m_files.empty());

	/* If there is more than one data file and the last data file
	doesn't exist, that is OK. We allow adding of new data files. */

	files_t::iterator	begin = m_files.begin();
	files_t::iterator	end = m_files.end();

	for (files_t::iterator it = begin; it != end; ++it) {

		file_status_t reason_if_failed;
		err = check_file_status(*it, reason_if_failed);

		if (err == DB_NOT_FOUND) {

			err = file_not_found(*it, create_new_db);

			if (err != DB_SUCCESS) {
				break;
			}

		} else if (err != DB_SUCCESS) {
			if (reason_if_failed == FILE_STATUS_READ_WRITE_ERROR) {
				const char*	p = (!srv_read_only_mode
						     || m_ignore_read_only)
						    ? "writable" : "readable";
				ib::error() << "The " << name() << " data file"
					<< " '" << it->name() << "' must be "
					<< p;
			}

			ut_a(err != DB_FAIL);
			break;

		} else if (*create_new_db) {
			ib::error() << "The " << name() << " data file '"
				<< begin->m_name << "' was not found but"
				" one of the other data files '" << it->m_name
				<< "' exists.";

			err = DB_ERROR;
			break;

		} else {
			*create_new_db = file_found(*it);
		}
	}

	/* We assume doublewirte blocks in the first data file. */
	if (err == DB_SUCCESS && *create_new_db
	    && begin->m_size < TRX_SYS_DOUBLEWRITE_BLOCK_SIZE * 3) {
		ib::error() << "The " << name() << " data file "
			<< "'" << begin->name() << "' must be at least "
			<< TRX_SYS_DOUBLEWRITE_BLOCK_SIZE * 3 * UNIV_PAGE_SIZE
			/ (1024 * 1024) << " MB";

		err = DB_ERROR;
	}

	return(err);
}

/** Open or create the data files
@param[in]  is_temp		whether this is a temporary tablespace
@param[in]  create_new_db	whether we are creating a new database
@param[out] sum_new_sizes	sum of sizes of the new files added
@param[out] flush_lsn		FIL_PAGE_FILE_FLUSH_LSN of first file
@return DB_SUCCESS or error code */
dberr_t
SysTablespace::open_or_create(
	bool	is_temp,
	bool	create_new_db,
	ulint*	sum_new_sizes,
	lsn_t*	flush_lsn)
{
	dberr_t		err	= DB_SUCCESS;
	fil_space_t*	space	= NULL;

	ut_ad(!m_files.empty());

	if (sum_new_sizes) {
		*sum_new_sizes = 0;
	}

	files_t::iterator	begin = m_files.begin();
	files_t::iterator	end = m_files.end();

	ut_ad(begin->order() == 0);

	for (files_t::iterator it = begin; it != end; ++it) {

		if (it->m_exists) {
			err = open_file(*it);

			/* For new raw device increment new size. */
			if (sum_new_sizes && it->m_type == SRV_NEW_RAW) {

				*sum_new_sizes += it->m_size;
			}

		} else {
			err = create_file(*it);

			if (sum_new_sizes) {
				*sum_new_sizes += it->m_size;
			}

			/* Set the correct open flags now that we have
			successfully created the file. */
			if (err == DB_SUCCESS) {
				/* We ignore new_db OUT parameter here
				as the information is known at this stage */
				file_found(*it);
			}
		}

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

#if !defined(NO_FALLOCATE) && defined(UNIV_LINUX)
		/* Note: This should really be per node and not per
		tablespace because a tablespace can contain multiple
		files (nodes). The implication is that all files of
		the tablespace should be on the same medium. */

		if (fil_fusionio_enable_atomic_write(it->m_handle)) {

			if (srv_use_doublewrite_buf) {
				ib::info() << "FusionIO atomic IO enabled,"
					" disabling the double write buffer";

				srv_use_doublewrite_buf = false;
			}

			it->m_atomic_write = true;
		} else {
			it->m_atomic_write = false;
		}
#else
		it->m_atomic_write = false;
#endif /* !NO_FALLOCATE && UNIV_LINUX*/
	}

	if (!create_new_db && flush_lsn) {
		/* Validate the header page in the first datafile
		and read LSNs fom the others. */
		err = read_lsn_and_check_flags(flush_lsn);
		if (err != DB_SUCCESS) {
			return(err);
		}
	}

	/* Close the curent handles, add space and file info to the
	fil_system cache and the Data Dictionary, and re-open them
	in file_system cache so that they stay open until shutdown. */
	ulint	node_counter = 0;
	for (files_t::iterator it = begin; it != end; ++it) {
		it->close();
		it->m_exists = true;

		if (it == begin) {
			/* First data file. */

			/* Create the tablespace entry for the multi-file
			tablespace in the tablespace manager. */
			space = fil_space_create(
				name(), space_id(), flags(), is_temp
				? FIL_TYPE_TEMPORARY : FIL_TYPE_TABLESPACE);
		}

		ut_a(fil_validate());

		ulint	max_size = (++node_counter == m_files.size()
				    ? (m_last_file_size_max == 0
				       ? ULINT_MAX
				       : m_last_file_size_max)
				    : it->m_size);

		/* Add the datafile to the fil_system cache. */
		if (!fil_node_create(
			    it->m_filepath, it->m_size,
			    space, it->m_type != SRV_NOT_RAW,
			    it->m_atomic_write, max_size)) {

			err = DB_ERROR;
			break;
		}
	}

	return(err);
}
#endif /* UNIV_HOTBACKUP */
/** Normalize the file size, convert from megabytes to number of pages. */
void
SysTablespace::normalize()
{
	files_t::iterator	end = m_files.end();

	for (files_t::iterator it = m_files.begin(); it != end; ++it) {

		it->m_size *= (1024 * 1024) / UNIV_PAGE_SIZE;
	}

	m_last_file_size_max *= (1024 * 1024) / UNIV_PAGE_SIZE;
}


/**
@return next increment size */
ulint
SysTablespace::get_increment() const
{
	ulint	increment;

	if (m_last_file_size_max == 0) {
		increment = get_autoextend_increment();
	} else {

		if (!is_valid_size()) {
			ib::error() << "The last data file in " << name()
				<< " has a size of " << last_file_size()
				<< " but the max size allowed is "
				<< m_last_file_size_max;
		}

		increment = m_last_file_size_max - last_file_size();
	}

	if (increment > get_autoextend_increment()) {
		increment = get_autoextend_increment();
	}

	return(increment);
}


/**
@return true if configured to use raw devices */
bool
SysTablespace::has_raw_device()
{
	files_t::iterator	end = m_files.end();

	for (files_t::iterator it = m_files.begin(); it != end; ++it) {

		if (it->is_raw_device()) {
			return(true);
		}
	}

	return(false);
}