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|
/*****************************************************************************
Copyright (c) 2013, 2016, Oracle and/or its affiliates. All Rights Reserved.
Copyright (c) 2021, 2022, MariaDB Corporation.
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.,
51 Franklin Street, Fifth Floor, 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 "fsp0sysspace.h"
#include "srv0start.h"
#include "trx0sys.h"
#include "dict0load.h"
#include "mem0mem.h"
#include "os0file.h"
#include "row0mysql.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"
/** 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;
/** 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)
{
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;
/* 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 */
/* JAN: TODO: MySQL 5.7 used opt_initialize */
m_files.back().m_type =
opt_bootstrap ? 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) {
/* JAN: TODO: MySQL 5.7 used opt_initialize */
m_files.back().m_type =
opt_bootstrap ? 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.*/
const ulint rounded_size_pages = static_cast<ulint>(
size >> srv_page_size_shift);
/* 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 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"
" 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 >> (20U - srv_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) << srv_page_size_shift);
if (success) {
ib::info() << "File '" << file.filepath() << "' size is now "
<< (file.m_size >> (20U - srv_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 && srv_read_only_mode);
break;
}
if (err != DB_SUCCESS) {
return err;
}
switch (file.m_type) {
case SRV_OLD_RAW:
break;
case SRV_NOT_RAW:
#ifndef _WIN32
if (!space_id() && my_disable_locking
&& os_file_lock(file.m_handle, file.m_filepath)) {
err = DB_ERROR;
break;
}
#endif
/* fall through */
case SRV_NEW_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 && 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:
#ifndef _WIN32
if (!space_id() && (m_ignore_read_only || !srv_read_only_mode)
&& my_disable_locking
&& os_file_lock(file.m_handle, file.m_filepath)) {
err = DB_ERROR;
break;
}
#endif
/* 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);
}
/** 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 == 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);
if (srv_operation == SRV_OPERATION_NORMAL) {
buf_dblwr_init_or_load_pages(it->handle(), it->filepath());
}
/* 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);
if (err != DB_SUCCESS
&& (retry == 1
|| it->restore_from_doublewrite())) {
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);
}
/** 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 (m_ignore_read_only) {
} else if (srv_read_only_mode) {
ib::error() << "Can't create file '" << file.filepath()
<< "' when --innodb-read-only is set";
return(DB_ERROR);
} else if (srv_force_recovery && space_id() == TRX_SYS_SPACE) {
ib::error() << "Can't create file '" << file.filepath()
<< "' when --innodb-force-recovery is set";
return DB_ERROR;
}
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);
}
/** 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 (!m_auto_extend_last_file
&& get_sum_of_sizes()
< (min_expected_size >> srv_page_size_shift)) {
ib::error() << "Tablespace size must be at least "
<< (min_expected_size >> 20) << " 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);
}
}
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 (!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) {
} else if (is_temp) {
ut_ad(!fil_system.temp_space);
ut_ad(space_id() == SRV_TMP_SPACE_ID);
space = fil_space_create(
name(), SRV_TMP_SPACE_ID, flags(),
FIL_TYPE_TEMPORARY, NULL);
mutex_enter(&fil_system.mutex);
fil_system.temp_space = space;
mutex_exit(&fil_system.mutex);
if (!space) {
return DB_ERROR;
}
} else {
ut_ad(!fil_system.sys_space);
ut_ad(space_id() == TRX_SYS_SPACE);
space = fil_space_create(
name(), TRX_SYS_SPACE, flags(),
FIL_TYPE_TABLESPACE, NULL);
mutex_enter(&fil_system.mutex);
fil_system.sys_space = space;
mutex_exit(&fil_system.mutex);
if (!space) {
return DB_ERROR;
}
}
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);
space->add(it->m_filepath, OS_FILE_CLOSED, it->m_size,
it->m_type != SRV_NOT_RAW, true, max_size);
}
return(err);
}
/** Normalize the file size, convert from megabytes to number of pages. */
void
SysTablespace::normalize_size()
{
files_t::iterator end = m_files.end();
for (files_t::iterator it = m_files.begin(); it != end; ++it) {
it->m_size <<= (20U - srv_page_size_shift);
}
m_last_file_size_max <<= (20U - srv_page_size_shift);
}
/**
@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);
}
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