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/*****************************************************************************
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Copyright (C) 1996, 2010, Innobase Oy. All Rights Reserved.
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Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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#include "read0types.h"
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#include "page0types.h"
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#include <drizzled/atomics.h>
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/** In a MySQL replication slave, in crash recovery we store the master log
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file name and position here. */
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/** Master binlog file name */
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extern char trx_sys_mysql_master_log_name[];
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/** Master binlog file position. We have successfully got the updates
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up to this position. -1 means that no crash recovery was needed, or
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there was no master log position info inside InnoDB.*/
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extern ib_int64_t trx_sys_mysql_master_log_pos;
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/** the highest commit identifier assigned in the system */
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extern drizzled::atomic<uint64_t> trx_sys_commit_id;
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/** If this MySQL server uses binary logging, after InnoDB has been inited
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and if it has done a crash recovery, we store the binlog file name and position
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/** Binlog file name */
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extern char trx_sys_mysql_bin_log_name[];
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/** Binlog file position, or -1 if unknown */
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extern ib_int64_t trx_sys_mysql_bin_log_pos;
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/** The transaction system */
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extern trx_sys_t* trx_sys;
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trx_t* in_trx);/*!< in: trx */
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/*****************************************************************//**
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Writes to the sys header file the latest commit_id in the system */
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Updates the offset information about the end of the MySQL binlog entry
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which corresponds to the transaction just being committed. In a MySQL
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replication slave updates the latest master binlog position up to which
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replication has proceeded. */
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trx_sys_flush_commit_id(uint64_t commit_id, ulint field, mtr_t* mtr);
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trx_sys_update_mysql_binlog_offset(
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/*===============================*/
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const char* file_name,/*!< in: MySQL log file name */
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ib_int64_t offset, /*!< in: position in that log file */
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ulint field, /*!< in: offset of the MySQL log info field in
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the trx sys header */
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mtr_t* mtr); /*!< in: mtr */
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/*****************************************************************//**
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Reads the latest commit_id into trx_sys_commit_id */
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Prints to stderr the MySQL binlog offset info in the trx system header if
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the magic number shows it valid. */
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trx_sys_read_commit_id(void);
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trx_sys_print_mysql_binlog_offset(void);
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/*===================================*/
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/*****************************************************************//**
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Prints to stderr the MySQL master log offset info in the trx system header if
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the magic number shows it valid. */
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trx_sys_file_format_tag_init(void);
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/*==============================*/
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#ifndef UNIV_HOTBACKUP
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/*****************************************************************//**
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Shutdown/Close the transaction system. */
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trx_sys_close(void);
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/*===============*/
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#endif /* !UNIV_HOTBACKUP */
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/*****************************************************************//**
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Get the name representation of the file format from its id.
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@return pointer to the name */
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ulint format_id); /*!< in: file format identifier */
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#else /* !UNIV_HOTBACKUP */
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/*****************************************************************//**
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Prints to stderr the MySQL binlog info in the system header if the
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magic number shows it valid. */
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trx_sys_print_mysql_binlog_offset_from_page(
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/*========================================*/
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const byte* page); /*!< in: buffer containing the trx
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system header page, i.e., page number
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TRX_SYS_PAGE_NO in the tablespace */
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/*****************************************************************//**
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Reads the file format id from the first system table space file.
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Even if the call succeeds and returns TRUE, the returned format id
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may be ULINT_UNDEFINED signalling that the format id was not present
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const ulint id); /*!< in: id of the file format */
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#endif /* !UNIV_HOTBACKUP */
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/*********************************************************************
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Creates the rollback segments */
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trx_sys_create_rsegs(
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/*=================*/
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ulint n_rsegs); /*!< number of rollback segments to create */
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/* The automatically created system rollback segment has this id */
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#define TRX_SYS_SYSTEM_RSEG_ID 0
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/*------------------------------------------------------------- @} */
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/* Max number of rollback segments: the number of segment specification slots
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in the transaction system array; rollback segment id must fit in one (signed)
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byte, therefore 128; each slot is currently 8 bytes in size. If you want
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to raise the level to 256 then you will need to fix some assertions that
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impose the 7 bit restriction. e.g., mach_write_to_3() */
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#define TRX_SYS_N_RSEGS 128
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/* Originally, InnoDB defined TRX_SYS_N_RSEGS as 256 but created only one
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rollback segment. It initialized some arrays with this number of entries.
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We must remember this limit in order to keep file compatibility. */
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#define TRX_SYS_OLD_N_RSEGS 256
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/** Maximum number of rollback segments: the number of segment
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specification slots in the transaction system array; rollback segment
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id must fit in one byte, therefore 256; each slot is currently 8 bytes
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#define TRX_SYS_N_RSEGS 256
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/** Maximum length of MySQL binlog file name, in bytes.
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@see trx_sys_mysql_master_log_name
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#define TRX_SYS_MYSQL_MASTER_LOG_INFO (UNIV_PAGE_SIZE - 2000)
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/** The offset of the MySQL binlog offset info in the trx system header */
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#define TRX_SYS_DRIZZLE_LOG_INFO (UNIV_PAGE_SIZE - 1000)
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#define TRX_SYS_DRIZZLE_MAX_COMMIT_ID 8 /*!< the maximum commit id
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assigned in the system */
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#define TRX_SYS_DRIZZLE_LOG_NAME 12 /*!< Unused */
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#define TRX_SYS_MYSQL_LOG_INFO (UNIV_PAGE_SIZE - 1000)
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#define TRX_SYS_MYSQL_LOG_MAGIC_N_FLD 0 /*!< magic number which is
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TRX_SYS_MYSQL_LOG_MAGIC_N
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if we have valid data in the
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#define TRX_SYS_MYSQL_LOG_OFFSET_HIGH 4 /*!< high 4 bytes of the offset
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#define TRX_SYS_MYSQL_LOG_OFFSET_LOW 8 /*!< low 4 bytes of the offset
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#define TRX_SYS_MYSQL_LOG_NAME 12 /*!< MySQL log file name */
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#ifndef UNIV_HOTBACKUP
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/** Doublewrite buffer */
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/** The offset of the doublewrite buffer header on the trx system header page */
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#define TRX_SYS_DOUBLEWRITE_BLOCK_SIZE FSP_EXTENT_SIZE
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#ifndef UNIV_HOTBACKUP
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/** File format tag */
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/** The offset of the file format tag on the trx system header page
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(TRX_SYS_PAGE_NO of TRX_SYS_SPACE) */
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#define TRX_SYS_FILE_FORMAT_TAG (UNIV_PAGE_SIZE - 16)
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/** Contents of TRX_SYS_FILE_FORMAT_TAG when valid. The file format
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/** Contents of TRX_SYS_FILE_FORMAT_TAG when valid. The file format
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identifier is added to this constant. */
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#define TRX_SYS_FILE_FORMAT_TAG_MAGIC_N_LOW 3645922177UL
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/** Contents of TRX_SYS_FILE_FORMAT_TAG+4 when valid */
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#define TRX_SYS_FILE_FORMAT_TAG_MAGIC_N_HIGH 2745987765UL
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/** Contents of TRX_SYS_FILE_FORMAT_TAG when valid. The file format
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identifier is added to this 64-bit constant. */
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#define TRX_SYS_FILE_FORMAT_TAG_MAGIC_N \
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((ib_uint64_t) TRX_SYS_FILE_FORMAT_TAG_MAGIC_N_HIGH << 32 \
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| TRX_SYS_FILE_FORMAT_TAG_MAGIC_N_LOW)
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/** Doublewrite control struct */
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trx_id_t max_trx_id; /*!< The smallest number not yet
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assigned as a transaction id or
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transaction number */
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UT_LIST_BASE_NODE_T(trx_t) trx_list;
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/*!< List of active and committed in
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memory transactions, sorted on trx id,