/
trx0sys.c
1811 lines (1462 loc) · 48.6 KB
/
trx0sys.c
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/*****************************************************************************
Copyright (c) 1996, 2013, 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 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, Suite 500, Boston, MA 02110-1335 USA
*****************************************************************************/
/**************************************************//**
@file trx/trx0sys.c
Transaction system
Created 3/26/1996 Heikki Tuuri
*******************************************************/
#include "trx0sys.h"
#ifdef UNIV_NONINL
#include "trx0sys.ic"
#endif
#ifndef UNIV_HOTBACKUP
#include "fsp0fsp.h"
#include "mtr0log.h"
#include "mtr0log.h"
#include "trx0trx.h"
#include "trx0rseg.h"
#include "trx0undo.h"
#include "srv0srv.h"
#include "srv0start.h"
#include "trx0purge.h"
#include "log0log.h"
#include "log0recv.h"
#include "os0file.h"
#include "read0read.h"
#ifdef WITH_WSREP
#include "ha_prototypes.h" /* wsrep_is_wsrep_xid() */
#endif /* */
/** The file format tag structure with id and name. */
struct file_format_struct {
ulint id; /*!< id of the file format */
const char* name; /*!< text representation of the
file format */
mutex_t mutex; /*!< covers changes to the above
fields */
};
/** The file format tag */
typedef struct file_format_struct file_format_t;
/** The transaction system */
UNIV_INTERN trx_sys_t* trx_sys = NULL;
/** The doublewrite buffer */
UNIV_INTERN trx_doublewrite_t* trx_doublewrite = NULL;
/** The following is set to TRUE when we are upgrading from pre-4.1
format data files to the multiple tablespaces format data files */
UNIV_INTERN ibool trx_doublewrite_must_reset_space_ids = FALSE;
/** Set to TRUE when the doublewrite buffer is being created */
UNIV_INTERN ibool trx_doublewrite_buf_is_being_created = FALSE;
/** The following is TRUE when we are using the database in the
post-4.1 format, i.e., we have successfully upgraded, or have created
a new database installation */
UNIV_INTERN ibool trx_sys_multiple_tablespace_format = FALSE;
/** In a MySQL replication slave, in crash recovery we store the master log
file name and position here. */
/* @{ */
/** Master binlog file name */
UNIV_INTERN char trx_sys_mysql_master_log_name[TRX_SYS_MYSQL_LOG_NAME_LEN];
/** Master binlog file position. We have successfully got the updates
up to this position. -1 means that no crash recovery was needed, or
there was no master log position info inside InnoDB.*/
UNIV_INTERN ib_int64_t trx_sys_mysql_master_log_pos = -1;
/* @} */
/** If this MySQL server uses binary logging, after InnoDB has been inited
and if it has done a crash recovery, we store the binlog file name and position
here. */
/* @{ */
/** Binlog file name */
UNIV_INTERN char trx_sys_mysql_bin_log_name[TRX_SYS_MYSQL_LOG_NAME_LEN];
/** Binlog file position, or -1 if unknown */
UNIV_INTERN ib_int64_t trx_sys_mysql_bin_log_pos = -1;
/* @} */
#endif /* !UNIV_HOTBACKUP */
/** List of animal names representing file format. */
static const char* file_format_name_map[] = {
"Antelope",
"Barracuda",
"Cheetah",
"Dragon",
"Elk",
"Fox",
"Gazelle",
"Hornet",
"Impala",
"Jaguar",
"Kangaroo",
"Leopard",
"Moose",
"Nautilus",
"Ocelot",
"Porpoise",
"Quail",
"Rabbit",
"Shark",
"Tiger",
"Urchin",
"Viper",
"Whale",
"Xenops",
"Yak",
"Zebra"
};
/** The number of elements in the file format name array. */
static const ulint FILE_FORMAT_NAME_N
= sizeof(file_format_name_map) / sizeof(file_format_name_map[0]);
#ifdef UNIV_PFS_MUTEX
/* Key to register the mutex with performance schema */
UNIV_INTERN mysql_pfs_key_t trx_doublewrite_mutex_key;
UNIV_INTERN mysql_pfs_key_t file_format_max_mutex_key;
#endif /* UNIV_PFS_MUTEX */
#ifndef UNIV_HOTBACKUP
#ifdef UNIV_DEBUG
/* Flag to control TRX_RSEG_N_SLOTS behavior debugging. */
UNIV_INTERN uint trx_rseg_n_slots_debug = 0;
#endif
/** This is used to track the maximum file format id known to InnoDB. It's
updated via SET GLOBAL innodb_file_format_max = 'x' or when we open
or create a table. */
static file_format_t file_format_max;
/****************************************************************//**
Determines if a page number is located inside the doublewrite buffer.
@return TRUE if the location is inside the two blocks of the
doublewrite buffer */
UNIV_INTERN
ibool
trx_doublewrite_page_inside(
/*========================*/
ulint page_no) /*!< in: page number */
{
if (trx_doublewrite == NULL) {
return(FALSE);
}
if (page_no >= trx_doublewrite->block1
&& page_no < trx_doublewrite->block1
+ TRX_SYS_DOUBLEWRITE_BLOCK_SIZE) {
return(TRUE);
}
if (page_no >= trx_doublewrite->block2
&& page_no < trx_doublewrite->block2
+ TRX_SYS_DOUBLEWRITE_BLOCK_SIZE) {
return(TRUE);
}
return(FALSE);
}
/****************************************************************//**
Creates or initialializes the doublewrite buffer at a database start. */
static
void
trx_doublewrite_init(
/*=================*/
byte* doublewrite) /*!< in: pointer to the doublewrite buf
header on trx sys page */
{
trx_doublewrite = mem_alloc(sizeof(trx_doublewrite_t));
/* Since we now start to use the doublewrite buffer, no need to call
fsync() after every write to a data file */
#ifdef UNIV_DO_FLUSH
os_do_not_call_flush_at_each_write = TRUE;
#endif /* UNIV_DO_FLUSH */
mutex_create(trx_doublewrite_mutex_key,
&trx_doublewrite->mutex, SYNC_DOUBLEWRITE);
trx_doublewrite->first_free = 0;
trx_doublewrite->block1 = mach_read_from_4(
doublewrite + TRX_SYS_DOUBLEWRITE_BLOCK1);
trx_doublewrite->block2 = mach_read_from_4(
doublewrite + TRX_SYS_DOUBLEWRITE_BLOCK2);
trx_doublewrite->write_buf_unaligned = ut_malloc(
(1 + 2 * TRX_SYS_DOUBLEWRITE_BLOCK_SIZE) * UNIV_PAGE_SIZE);
trx_doublewrite->write_buf = ut_align(
trx_doublewrite->write_buf_unaligned, UNIV_PAGE_SIZE);
trx_doublewrite->buf_block_arr = mem_alloc(
2 * TRX_SYS_DOUBLEWRITE_BLOCK_SIZE * sizeof(void*));
}
/****************************************************************//**
Marks the trx sys header when we have successfully upgraded to the >= 4.1.x
multiple tablespace format. */
UNIV_INTERN
void
trx_sys_mark_upgraded_to_multiple_tablespaces(void)
/*===============================================*/
{
buf_block_t* block;
byte* doublewrite;
mtr_t mtr;
/* We upgraded to 4.1.x and reset the space id fields in the
doublewrite buffer. Let us mark to the trx_sys header that the upgrade
has been done. */
mtr_start(&mtr);
block = buf_page_get(TRX_SYS_SPACE, 0, TRX_SYS_PAGE_NO,
RW_X_LATCH, &mtr);
buf_block_dbg_add_level(block, SYNC_NO_ORDER_CHECK);
doublewrite = buf_block_get_frame(block) + TRX_SYS_DOUBLEWRITE;
mlog_write_ulint(doublewrite + TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED,
TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED_N,
MLOG_4BYTES, &mtr);
mtr_commit(&mtr);
/* Flush the modified pages to disk and make a checkpoint */
log_make_checkpoint_at(IB_ULONGLONG_MAX, TRUE);
trx_sys_multiple_tablespace_format = TRUE;
}
/****************************************************************//**
Creates the doublewrite buffer to a new InnoDB installation. The header of the
doublewrite buffer is placed on the trx system header page. */
UNIV_INTERN
void
trx_sys_create_doublewrite_buf(void)
/*================================*/
{
buf_block_t* block;
buf_block_t* block2;
buf_block_t* new_block;
byte* doublewrite;
byte* fseg_header;
ulint page_no;
ulint prev_page_no;
ulint i;
mtr_t mtr;
if (trx_doublewrite) {
/* Already inited */
return;
}
start_again:
mtr_start(&mtr);
trx_doublewrite_buf_is_being_created = TRUE;
block = buf_page_get(TRX_SYS_SPACE, 0, TRX_SYS_PAGE_NO,
RW_X_LATCH, &mtr);
buf_block_dbg_add_level(block, SYNC_NO_ORDER_CHECK);
doublewrite = buf_block_get_frame(block) + TRX_SYS_DOUBLEWRITE;
if (mach_read_from_4(doublewrite + TRX_SYS_DOUBLEWRITE_MAGIC)
== TRX_SYS_DOUBLEWRITE_MAGIC_N) {
/* The doublewrite buffer has already been created:
just read in some numbers */
trx_doublewrite_init(doublewrite);
mtr_commit(&mtr);
trx_doublewrite_buf_is_being_created = FALSE;
} else {
fprintf(stderr,
"InnoDB: Doublewrite buffer not found:"
" creating new\n");
if (buf_pool_get_curr_size()
< ((2 * TRX_SYS_DOUBLEWRITE_BLOCK_SIZE
+ FSP_EXTENT_SIZE / 2 + 100)
* UNIV_PAGE_SIZE)) {
fprintf(stderr,
"InnoDB: Cannot create doublewrite buffer:"
" you must\n"
"InnoDB: increase your buffer pool size.\n"
"InnoDB: Cannot continue operation.\n");
exit(1);
}
block2 = fseg_create(TRX_SYS_SPACE, TRX_SYS_PAGE_NO,
TRX_SYS_DOUBLEWRITE
+ TRX_SYS_DOUBLEWRITE_FSEG, &mtr);
/* fseg_create acquires a second latch on the page,
therefore we must declare it: */
buf_block_dbg_add_level(block2, SYNC_NO_ORDER_CHECK);
if (block2 == NULL) {
fprintf(stderr,
"InnoDB: Cannot create doublewrite buffer:"
" you must\n"
"InnoDB: increase your tablespace size.\n"
"InnoDB: Cannot continue operation.\n");
/* We exit without committing the mtr to prevent
its modifications to the database getting to disk */
exit(1);
}
fseg_header = buf_block_get_frame(block)
+ TRX_SYS_DOUBLEWRITE + TRX_SYS_DOUBLEWRITE_FSEG;
prev_page_no = 0;
for (i = 0; i < 2 * TRX_SYS_DOUBLEWRITE_BLOCK_SIZE
+ FSP_EXTENT_SIZE / 2; i++) {
new_block = fseg_alloc_free_page(
fseg_header, prev_page_no + 1, FSP_UP, &mtr);
if (new_block == NULL) {
fprintf(stderr,
"InnoDB: Cannot create doublewrite"
" buffer: you must\n"
"InnoDB: increase your"
" tablespace size.\n"
"InnoDB: Cannot continue operation.\n"
);
exit(1);
}
/* We read the allocated pages to the buffer pool;
when they are written to disk in a flush, the space
id and page number fields are also written to the
pages. When we at database startup read pages
from the doublewrite buffer, we know that if the
space id and page number in them are the same as
the page position in the tablespace, then the page
has not been written to in doublewrite. */
ut_ad(rw_lock_get_x_lock_count(&new_block->lock) == 1);
page_no = buf_block_get_page_no(new_block);
if (i == FSP_EXTENT_SIZE / 2) {
ut_a(page_no == FSP_EXTENT_SIZE);
mlog_write_ulint(doublewrite
+ TRX_SYS_DOUBLEWRITE_BLOCK1,
page_no, MLOG_4BYTES, &mtr);
mlog_write_ulint(doublewrite
+ TRX_SYS_DOUBLEWRITE_REPEAT
+ TRX_SYS_DOUBLEWRITE_BLOCK1,
page_no, MLOG_4BYTES, &mtr);
} else if (i == FSP_EXTENT_SIZE / 2
+ TRX_SYS_DOUBLEWRITE_BLOCK_SIZE) {
ut_a(page_no == 2 * FSP_EXTENT_SIZE);
mlog_write_ulint(doublewrite
+ TRX_SYS_DOUBLEWRITE_BLOCK2,
page_no, MLOG_4BYTES, &mtr);
mlog_write_ulint(doublewrite
+ TRX_SYS_DOUBLEWRITE_REPEAT
+ TRX_SYS_DOUBLEWRITE_BLOCK2,
page_no, MLOG_4BYTES, &mtr);
} else if (i > FSP_EXTENT_SIZE / 2) {
ut_a(page_no == prev_page_no + 1);
}
prev_page_no = page_no;
}
mlog_write_ulint(doublewrite + TRX_SYS_DOUBLEWRITE_MAGIC,
TRX_SYS_DOUBLEWRITE_MAGIC_N,
MLOG_4BYTES, &mtr);
mlog_write_ulint(doublewrite + TRX_SYS_DOUBLEWRITE_MAGIC
+ TRX_SYS_DOUBLEWRITE_REPEAT,
TRX_SYS_DOUBLEWRITE_MAGIC_N,
MLOG_4BYTES, &mtr);
mlog_write_ulint(doublewrite
+ TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED,
TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED_N,
MLOG_4BYTES, &mtr);
mtr_commit(&mtr);
/* Flush the modified pages to disk and make a checkpoint */
log_make_checkpoint_at(IB_ULONGLONG_MAX, TRUE);
fprintf(stderr, "InnoDB: Doublewrite buffer created\n");
trx_sys_multiple_tablespace_format = TRUE;
goto start_again;
}
}
/****************************************************************//**
At a database startup initializes the doublewrite buffer memory structure if
we already have a doublewrite buffer created in the data files. If we are
upgrading to an InnoDB version which supports multiple tablespaces, then this
function performs the necessary update operations. If we are in a crash
recovery, this function uses a possible doublewrite buffer to restore
half-written pages in the data files. */
UNIV_INTERN
void
trx_sys_doublewrite_init_or_restore_pages(
/*======================================*/
ibool restore_corrupt_pages) /*!< in: TRUE=restore pages */
{
byte* buf;
byte* read_buf;
byte* unaligned_read_buf;
ulint block1;
ulint block2;
ulint source_page_no;
byte* page;
byte* doublewrite;
ulint space_id;
ulint page_no;
ulint i;
/* We do the file i/o past the buffer pool */
unaligned_read_buf = ut_malloc(2 * UNIV_PAGE_SIZE);
read_buf = ut_align(unaligned_read_buf, UNIV_PAGE_SIZE);
/* Read the trx sys header to check if we are using the doublewrite
buffer */
fil_io(OS_FILE_READ, TRUE, TRX_SYS_SPACE, 0, TRX_SYS_PAGE_NO, 0,
UNIV_PAGE_SIZE, read_buf, NULL);
doublewrite = read_buf + TRX_SYS_DOUBLEWRITE;
if (mach_read_from_4(doublewrite + TRX_SYS_DOUBLEWRITE_MAGIC)
== TRX_SYS_DOUBLEWRITE_MAGIC_N) {
/* The doublewrite buffer has been created */
trx_doublewrite_init(doublewrite);
block1 = trx_doublewrite->block1;
block2 = trx_doublewrite->block2;
buf = trx_doublewrite->write_buf;
} else {
goto leave_func;
}
if (mach_read_from_4(doublewrite + TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED)
!= TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED_N) {
/* We are upgrading from a version < 4.1.x to a version where
multiple tablespaces are supported. We must reset the space id
field in the pages in the doublewrite buffer because starting
from this version the space id is stored to
FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID. */
trx_doublewrite_must_reset_space_ids = TRUE;
fprintf(stderr,
"InnoDB: Resetting space id's in the"
" doublewrite buffer\n");
} else {
trx_sys_multiple_tablespace_format = TRUE;
}
/* Read the pages from the doublewrite buffer to memory */
fil_io(OS_FILE_READ, TRUE, TRX_SYS_SPACE, 0, block1, 0,
TRX_SYS_DOUBLEWRITE_BLOCK_SIZE * UNIV_PAGE_SIZE,
buf, NULL);
fil_io(OS_FILE_READ, TRUE, TRX_SYS_SPACE, 0, block2, 0,
TRX_SYS_DOUBLEWRITE_BLOCK_SIZE * UNIV_PAGE_SIZE,
buf + TRX_SYS_DOUBLEWRITE_BLOCK_SIZE * UNIV_PAGE_SIZE,
NULL);
/* Check if any of these pages is half-written in data files, in the
intended position */
page = buf;
for (i = 0; i < TRX_SYS_DOUBLEWRITE_BLOCK_SIZE * 2; i++) {
page_no = mach_read_from_4(page + FIL_PAGE_OFFSET);
if (trx_doublewrite_must_reset_space_ids) {
space_id = 0;
mach_write_to_4(page
+ FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID, 0);
/* We do not need to calculate new checksums for the
pages because the field .._SPACE_ID does not affect
them. Write the page back to where we read it from. */
if (i < TRX_SYS_DOUBLEWRITE_BLOCK_SIZE) {
source_page_no = block1 + i;
} else {
source_page_no = block2
+ i - TRX_SYS_DOUBLEWRITE_BLOCK_SIZE;
}
fil_io(OS_FILE_WRITE, TRUE, 0, 0, source_page_no, 0,
UNIV_PAGE_SIZE, page, NULL);
/* printf("Resetting space id in page %lu\n",
source_page_no); */
} else {
space_id = mach_read_from_4(
page + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID);
}
if (!restore_corrupt_pages) {
/* The database was shut down gracefully: no need to
restore pages */
} else if (!fil_tablespace_exists_in_mem(space_id)) {
/* Maybe we have dropped the single-table tablespace
and this page once belonged to it: do nothing */
} else if (!fil_check_adress_in_tablespace(space_id,
page_no)) {
fprintf(stderr,
"InnoDB: Warning: a page in the"
" doublewrite buffer is not within space\n"
"InnoDB: bounds; space id %lu"
" page number %lu, page %lu in"
" doublewrite buf.\n",
(ulong) space_id, (ulong) page_no, (ulong) i);
} else if (space_id == TRX_SYS_SPACE
&& ((page_no >= block1
&& page_no
< block1 + TRX_SYS_DOUBLEWRITE_BLOCK_SIZE)
|| (page_no >= block2
&& page_no
< (block2
+ TRX_SYS_DOUBLEWRITE_BLOCK_SIZE)))) {
/* It is an unwritten doublewrite buffer page:
do nothing */
} else {
ulint zip_size = fil_space_get_zip_size(space_id);
/* Read in the actual page from the file */
fil_io(OS_FILE_READ, TRUE, space_id, zip_size,
page_no, 0,
zip_size ? zip_size : UNIV_PAGE_SIZE,
read_buf, NULL);
/* Check if the page is corrupt */
if (UNIV_UNLIKELY
(buf_page_is_corrupted(
TRUE, read_buf, zip_size))) {
fprintf(stderr,
"InnoDB: Warning: database page"
" corruption or a failed\n"
"InnoDB: file read of"
" space %lu page %lu.\n"
"InnoDB: Trying to recover it from"
" the doublewrite buffer.\n",
(ulong) space_id, (ulong) page_no);
if (buf_page_is_corrupted(
TRUE, page, zip_size)) {
fprintf(stderr,
"InnoDB: Dump of the page:\n");
buf_page_print(
read_buf, zip_size,
BUF_PAGE_PRINT_NO_CRASH);
fprintf(stderr,
"InnoDB: Dump of"
" corresponding page"
" in doublewrite buffer:\n");
buf_page_print(
page, zip_size,
BUF_PAGE_PRINT_NO_CRASH);
fprintf(stderr,
"InnoDB: Also the page in the"
" doublewrite buffer"
" is corrupt.\n"
"InnoDB: Cannot continue"
" operation.\n"
"InnoDB: You can try to"
" recover the database"
" with the my.cnf\n"
"InnoDB: option:\n"
"InnoDB:"
" innodb_force_recovery=6\n");
ut_error;
}
/* Write the good page from the
doublewrite buffer to the intended
position */
fil_io(OS_FILE_WRITE, TRUE, space_id,
zip_size, page_no, 0,
zip_size ? zip_size : UNIV_PAGE_SIZE,
page, NULL);
fprintf(stderr,
"InnoDB: Recovered the page from"
" the doublewrite buffer.\n");
}
}
page += UNIV_PAGE_SIZE;
}
fil_flush_file_spaces(FIL_TABLESPACE);
leave_func:
ut_free(unaligned_read_buf);
}
/****************************************************************//**
Checks that trx is in the trx list.
@return TRUE if is in */
UNIV_INTERN
ibool
trx_in_trx_list(
/*============*/
trx_t* in_trx) /*!< in: trx */
{
trx_t* trx;
ut_ad(mutex_own(&(kernel_mutex)));
trx = UT_LIST_GET_FIRST(trx_sys->trx_list);
while (trx != NULL) {
if (trx == in_trx) {
return(TRUE);
}
trx = UT_LIST_GET_NEXT(trx_list, trx);
}
return(FALSE);
}
/*****************************************************************//**
Writes the value of max_trx_id to the file based trx system header. */
UNIV_INTERN
void
trx_sys_flush_max_trx_id(void)
/*==========================*/
{
trx_sysf_t* sys_header;
mtr_t mtr;
ut_ad(mutex_own(&kernel_mutex));
mtr_start(&mtr);
sys_header = trx_sysf_get(&mtr);
mlog_write_ull(sys_header + TRX_SYS_TRX_ID_STORE,
trx_sys->max_trx_id, &mtr);
mtr_commit(&mtr);
}
/*****************************************************************//**
Updates the offset information about the end of the MySQL binlog entry
which corresponds to the transaction just being committed. In a MySQL
replication slave updates the latest master binlog position up to which
replication has proceeded. */
UNIV_INTERN
void
trx_sys_update_mysql_binlog_offset(
/*===============================*/
const char* file_name,/*!< in: MySQL log file name */
ib_int64_t offset, /*!< in: position in that log file */
ulint field, /*!< in: offset of the MySQL log info field in
the trx sys header */
#ifdef WITH_WSREP
trx_sysf_t* sys_header, /*!< in: trx sys header */
#endif /* WITH_WSREP */
mtr_t* mtr) /*!< in: mtr */
{
#ifndef WITH_WSREP
trx_sysf_t* sys_header;
#endif /* !WITH_WSREP */
if (ut_strlen(file_name) >= TRX_SYS_MYSQL_LOG_NAME_LEN) {
/* We cannot fit the name to the 512 bytes we have reserved */
return;
}
#ifndef WITH_WSREP
sys_header = trx_sysf_get(mtr);
#endif /* !WITH_WSREP */
if (mach_read_from_4(sys_header + field
+ TRX_SYS_MYSQL_LOG_MAGIC_N_FLD)
!= TRX_SYS_MYSQL_LOG_MAGIC_N) {
mlog_write_ulint(sys_header + field
+ TRX_SYS_MYSQL_LOG_MAGIC_N_FLD,
TRX_SYS_MYSQL_LOG_MAGIC_N,
MLOG_4BYTES, mtr);
}
if (0 != strcmp((char*) (sys_header + field + TRX_SYS_MYSQL_LOG_NAME),
file_name)) {
mlog_write_string(sys_header + field
+ TRX_SYS_MYSQL_LOG_NAME,
(byte*) file_name, 1 + ut_strlen(file_name),
mtr);
}
if (mach_read_from_4(sys_header + field
+ TRX_SYS_MYSQL_LOG_OFFSET_HIGH) > 0
|| (offset >> 32) > 0) {
mlog_write_ulint(sys_header + field
+ TRX_SYS_MYSQL_LOG_OFFSET_HIGH,
(ulint)(offset >> 32),
MLOG_4BYTES, mtr);
}
mlog_write_ulint(sys_header + field
+ TRX_SYS_MYSQL_LOG_OFFSET_LOW,
(ulint)(offset & 0xFFFFFFFFUL),
MLOG_4BYTES, mtr);
}
/*****************************************************************//**
Stores the MySQL binlog offset info in the trx system header if
the magic number shows it valid, and print the info to stderr */
UNIV_INTERN
void
trx_sys_print_mysql_binlog_offset(void)
/*===================================*/
{
trx_sysf_t* sys_header;
mtr_t mtr;
ulint trx_sys_mysql_bin_log_pos_high;
ulint trx_sys_mysql_bin_log_pos_low;
mtr_start(&mtr);
sys_header = trx_sysf_get(&mtr);
if (mach_read_from_4(sys_header + TRX_SYS_MYSQL_LOG_INFO
+ TRX_SYS_MYSQL_LOG_MAGIC_N_FLD)
!= TRX_SYS_MYSQL_LOG_MAGIC_N) {
mtr_commit(&mtr);
return;
}
trx_sys_mysql_bin_log_pos_high = mach_read_from_4(
sys_header + TRX_SYS_MYSQL_LOG_INFO
+ TRX_SYS_MYSQL_LOG_OFFSET_HIGH);
trx_sys_mysql_bin_log_pos_low = mach_read_from_4(
sys_header + TRX_SYS_MYSQL_LOG_INFO
+ TRX_SYS_MYSQL_LOG_OFFSET_LOW);
trx_sys_mysql_bin_log_pos
= (((ib_int64_t)trx_sys_mysql_bin_log_pos_high) << 32)
+ (ib_int64_t)trx_sys_mysql_bin_log_pos_low;
ut_memcpy(trx_sys_mysql_bin_log_name,
sys_header + TRX_SYS_MYSQL_LOG_INFO
+ TRX_SYS_MYSQL_LOG_NAME, TRX_SYS_MYSQL_LOG_NAME_LEN);
fprintf(stderr,
"InnoDB: Last MySQL binlog file position %lu %lu,"
" file name %s\n",
trx_sys_mysql_bin_log_pos_high, trx_sys_mysql_bin_log_pos_low,
trx_sys_mysql_bin_log_name);
mtr_commit(&mtr);
}
#ifdef WITH_WSREP
#ifdef UNIV_DEBUG
static long long trx_sys_cur_xid_seqno = -1;
static unsigned char trx_sys_cur_xid_uuid[16];
long long read_wsrep_xid_seqno(const XID* xid)
{
long long seqno;
memcpy(&seqno, xid->data + 24, sizeof(long long));
return seqno;
}
void read_wsrep_xid_uuid(const XID* xid, unsigned char* buf)
{
memcpy(buf, xid->data + 8, 16);
}
#endif /* UNIV_DEBUG */
void
trx_sys_update_wsrep_checkpoint(
const XID* xid, /*!< in: transaction XID */
trx_sysf_t* sys_header, /*!< in: sys_header */
mtr_t* mtr) /*!< in: mtr */
{
ut_ad(xid && mtr && sys_header);
ut_a(xid->formatID == -1 || wsrep_is_wsrep_xid(xid));
if (mach_read_from_4(sys_header + TRX_SYS_WSREP_XID_INFO
+ TRX_SYS_WSREP_XID_MAGIC_N_FLD)
!= TRX_SYS_WSREP_XID_MAGIC_N) {
mlog_write_ulint(sys_header + TRX_SYS_WSREP_XID_INFO
+ TRX_SYS_WSREP_XID_MAGIC_N_FLD,
TRX_SYS_WSREP_XID_MAGIC_N,
MLOG_4BYTES, mtr);
}
mlog_write_ulint(sys_header + TRX_SYS_WSREP_XID_INFO
+ TRX_SYS_WSREP_XID_FORMAT,
(int)xid->formatID,
MLOG_4BYTES, mtr);
mlog_write_ulint(sys_header + TRX_SYS_WSREP_XID_INFO
+ TRX_SYS_WSREP_XID_GTRID_LEN,
(int)xid->gtrid_length,
MLOG_4BYTES, mtr);
mlog_write_ulint(sys_header + TRX_SYS_WSREP_XID_INFO
+ TRX_SYS_WSREP_XID_BQUAL_LEN,
(int)xid->bqual_length,
MLOG_4BYTES, mtr);
mlog_write_string(sys_header + TRX_SYS_WSREP_XID_INFO
+ TRX_SYS_WSREP_XID_DATA,
(const unsigned char*) xid->data,
XIDDATASIZE, mtr);
}
void
trx_sys_read_wsrep_checkpoint(XID* xid)
/*===================================*/
{
trx_sysf_t* sys_header;
mtr_t mtr;
ulint magic;
ut_ad(xid);
mtr_start(&mtr);
sys_header = trx_sysf_get(&mtr);
if ((magic = mach_read_from_4(sys_header + TRX_SYS_WSREP_XID_INFO
+ TRX_SYS_WSREP_XID_MAGIC_N_FLD))
!= TRX_SYS_WSREP_XID_MAGIC_N) {
memset(xid, 0, sizeof(*xid));
xid->formatID = -1;
trx_sys_update_wsrep_checkpoint(xid, sys_header, &mtr);
mtr_commit(&mtr);
return;
}
xid->formatID = (int)mach_read_from_4(
sys_header
+ TRX_SYS_WSREP_XID_INFO + TRX_SYS_WSREP_XID_FORMAT);
xid->gtrid_length = (int)mach_read_from_4(
sys_header
+ TRX_SYS_WSREP_XID_INFO + TRX_SYS_WSREP_XID_GTRID_LEN);
xid->bqual_length = (int)mach_read_from_4(
sys_header
+ TRX_SYS_WSREP_XID_INFO + TRX_SYS_WSREP_XID_BQUAL_LEN);
ut_memcpy(xid->data,
sys_header + TRX_SYS_WSREP_XID_INFO + TRX_SYS_WSREP_XID_DATA,
XIDDATASIZE);
mtr_commit(&mtr);
}
#endif /* WITH_WSREP */
/*****************************************************************//**
Prints to stderr the MySQL master log offset info in the trx system header if
the magic number shows it valid. */
UNIV_INTERN
void
trx_sys_print_mysql_master_log_pos(void)
/*====================================*/
{
trx_sysf_t* sys_header;
mtr_t mtr;
mtr_start(&mtr);
sys_header = trx_sysf_get(&mtr);
if (mach_read_from_4(sys_header + TRX_SYS_MYSQL_MASTER_LOG_INFO
+ TRX_SYS_MYSQL_LOG_MAGIC_N_FLD)
!= TRX_SYS_MYSQL_LOG_MAGIC_N) {
mtr_commit(&mtr);
return;
}
fprintf(stderr,
"InnoDB: In a MySQL replication slave the last"
" master binlog file\n"
"InnoDB: position %lu %lu, file name %s\n",
(ulong) mach_read_from_4(sys_header
+ TRX_SYS_MYSQL_MASTER_LOG_INFO
+ TRX_SYS_MYSQL_LOG_OFFSET_HIGH),
(ulong) mach_read_from_4(sys_header
+ TRX_SYS_MYSQL_MASTER_LOG_INFO
+ TRX_SYS_MYSQL_LOG_OFFSET_LOW),
sys_header + TRX_SYS_MYSQL_MASTER_LOG_INFO
+ TRX_SYS_MYSQL_LOG_NAME);
/* Copy the master log position info to global variables we can
use in ha_innobase.cc to initialize glob_mi to right values */
ut_memcpy(trx_sys_mysql_master_log_name,
sys_header + TRX_SYS_MYSQL_MASTER_LOG_INFO
+ TRX_SYS_MYSQL_LOG_NAME,
TRX_SYS_MYSQL_LOG_NAME_LEN);
trx_sys_mysql_master_log_pos
= (((ib_int64_t) mach_read_from_4(
sys_header + TRX_SYS_MYSQL_MASTER_LOG_INFO
+ TRX_SYS_MYSQL_LOG_OFFSET_HIGH)) << 32)
+ ((ib_int64_t) mach_read_from_4(
sys_header + TRX_SYS_MYSQL_MASTER_LOG_INFO
+ TRX_SYS_MYSQL_LOG_OFFSET_LOW));
mtr_commit(&mtr);
}
/****************************************************************//**
Looks for a free slot for a rollback segment in the trx system file copy.
@return slot index or ULINT_UNDEFINED if not found */
UNIV_INTERN
ulint
trx_sysf_rseg_find_free(
/*====================*/
mtr_t* mtr) /*!< in: mtr */
{
trx_sysf_t* sys_header;
ulint page_no;
ulint i;
ut_ad(mutex_own(&(kernel_mutex)));
sys_header = trx_sysf_get(mtr);
for (i = 0; i < TRX_SYS_N_RSEGS; i++) {
page_no = trx_sysf_rseg_get_page_no(sys_header, i, mtr);
if (page_no == FIL_NULL) {
return(i);
}
}
return(ULINT_UNDEFINED);
}
/*****************************************************************//**
Creates the file page for the transaction system. This function is called only
at the database creation, before trx_sys_init. */
static
void
trx_sysf_create(
/*============*/
mtr_t* mtr) /*!< in: mtr */
{
trx_sysf_t* sys_header;
ulint slot_no;
buf_block_t* block;
page_t* page;
ulint page_no;
byte* ptr;
ulint len;