Renamed storage/innodb_plugin to storage/innobase, so that 1) it's the same

layout as we always had in trees containing only the builtin
2) win\configure.js WITH_INNOBASE_STORAGE_ENGINE still works.

storage/innobase/CMakeLists.txt:
  fix to new directory name (and like 5.1)
storage/innobase/Makefile.am:
  fix to new directory name (and like 5.1)
storage/innobase/handler/ha_innodb.cc:
  fix to new directory name (and like 5.1)
storage/innobase/plug.in:
  fix to new directory name (and like 5.1)

1 files changed, 958 insertions, 0 deletions

diff --git a/storage/innobase/include/log0log.h b/storage/innobase/include/log0log.h
new file mode 100644
index 00000000000..059f548a085
--- /dev/null
+++ b/storage/innobase/include/log0log.h
@@ -0,0 +1,958 @@
+/*****************************************************************************
+
+Copyright (c) 1995, 2009, Innobase Oy. 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., 59 Temple
+Place, Suite 330, Boston, MA 02111-1307 USA
+
+*****************************************************************************/
+/*****************************************************************************
+
+Copyright (c) 1995, 2009, Innobase Oy. All Rights Reserved.
+Copyright (c) 2009, 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
+
+*****************************************************************************/
+
+/**************************************************//**
+@file include/log0log.h
+Database log
+
+Created 12/9/1995 Heikki Tuuri
+*******************************************************/
+
+#ifndef log0log_h
+#define log0log_h
+
+#include "univ.i"
+#include "ut0byte.h"
+#include "ut0lst.h"
+#ifndef UNIV_HOTBACKUP
+#include "sync0sync.h"
+#include "sync0rw.h"
+#endif /* !UNIV_HOTBACKUP */
+
+/** Redo log buffer */
+typedef struct log_struct	log_t;
+/** Redo log group */
+typedef struct log_group_struct	log_group_t;
+
+#ifdef UNIV_DEBUG
+/** Flag: write to log file? */
+extern	ibool	log_do_write;
+/** Flag: enable debug output when writing to the log? */
+extern	ibool	log_debug_writes;
+#else /* UNIV_DEBUG */
+/** Write to log */
+# define log_do_write TRUE
+#endif /* UNIV_DEBUG */
+
+/** Wait modes for log_write_up_to @{ */
+#define LOG_NO_WAIT		91
+#define LOG_WAIT_ONE_GROUP	92
+#define	LOG_WAIT_ALL_GROUPS	93
+/* @} */
+/** Maximum number of log groups in log_group_struct::checkpoint_buf */
+#define LOG_MAX_N_GROUPS	32
+
+#ifndef UNIV_HOTBACKUP
+/****************************************************************//**
+Sets the global variable log_fsp_current_free_limit. Also makes a checkpoint,
+so that we know that the limit has been written to a log checkpoint field
+on disk. */
+UNIV_INTERN
+void
+log_fsp_current_free_limit_set_and_checkpoint(
+/*==========================================*/
+	ulint	limit);	/*!< in: limit to set */
+#endif /* !UNIV_HOTBACKUP */
+/*******************************************************************//**
+Calculates where in log files we find a specified lsn.
+@return	log file number */
+UNIV_INTERN
+ulint
+log_calc_where_lsn_is(
+/*==================*/
+	ib_int64_t*	log_file_offset,	/*!< out: offset in that file
+						(including the header) */
+	ib_uint64_t	first_header_lsn,	/*!< in: first log file start
+						lsn */
+	ib_uint64_t	lsn,			/*!< in: lsn whose position to
+						determine */
+	ulint		n_log_files,		/*!< in: total number of log
+						files */
+	ib_int64_t	log_file_size);		/*!< in: log file size
+						(including the header) */
+#ifndef UNIV_HOTBACKUP
+/************************************************************//**
+Writes to the log the string given. The log must be released with
+log_release.
+@return	end lsn of the log record, zero if did not succeed */
+UNIV_INLINE
+ib_uint64_t
+log_reserve_and_write_fast(
+/*=======================*/
+	byte*		str,	/*!< in: string */
+	ulint		len,	/*!< in: string length */
+	ib_uint64_t*	start_lsn,/*!< out: start lsn of the log record */
+	ibool*		success);/*!< out: TRUE if success */
+/***********************************************************************//**
+Releases the log mutex. */
+UNIV_INLINE
+void
+log_release(void);
+/*=============*/
+/***********************************************************************//**
+Checks if there is need for a log buffer flush or a new checkpoint, and does
+this if yes. Any database operation should call this when it has modified
+more than about 4 pages. NOTE that this function may only be called when the
+OS thread owns no synchronization objects except the dictionary mutex. */
+UNIV_INLINE
+void
+log_free_check(void);
+/*================*/
+/************************************************************//**
+Opens the log for log_write_low. The log must be closed with log_close and
+released with log_release.
+@return	start lsn of the log record */
+UNIV_INTERN
+ib_uint64_t
+log_reserve_and_open(
+/*=================*/
+	ulint	len);	/*!< in: length of data to be catenated */
+/************************************************************//**
+Writes to the log the string given. It is assumed that the caller holds the
+log mutex. */
+UNIV_INTERN
+void
+log_write_low(
+/*==========*/
+	byte*	str,		/*!< in: string */
+	ulint	str_len);	/*!< in: string length */
+/************************************************************//**
+Closes the log.
+@return	lsn */
+UNIV_INTERN
+ib_uint64_t
+log_close(void);
+/*===========*/
+/************************************************************//**
+Gets the current lsn.
+@return	current lsn */
+UNIV_INLINE
+ib_uint64_t
+log_get_lsn(void);
+/*=============*/
+/****************************************************************
+Gets the log group capacity. It is OK to read the value without
+holding log_sys->mutex because it is constant.
+@return	log group capacity */
+UNIV_INLINE
+ulint
+log_get_capacity(void);
+/*==================*/
+/******************************************************//**
+Initializes the log. */
+UNIV_INTERN
+void
+log_init(void);
+/*==========*/
+/******************************************************************//**
+Inits a log group to the log system. */
+UNIV_INTERN
+void
+log_group_init(
+/*===========*/
+	ulint	id,			/*!< in: group id */
+	ulint	n_files,		/*!< in: number of log files */
+	ulint	file_size,		/*!< in: log file size in bytes */
+	ulint	space_id,		/*!< in: space id of the file space
+					which contains the log files of this
+					group */
+	ulint	archive_space_id);	/*!< in: space id of the file space
+					which contains some archived log
+					files for this group; currently, only
+					for the first log group this is
+					used */
+/******************************************************//**
+Completes an i/o to a log file. */
+UNIV_INTERN
+void
+log_io_complete(
+/*============*/
+	log_group_t*	group);	/*!< in: log group */
+/******************************************************//**
+This function is called, e.g., when a transaction wants to commit. It checks
+that the log has been written to the log file up to the last log entry written
+by the transaction. If there is a flush running, it waits and checks if the
+flush flushed enough. If not, starts a new flush. */
+UNIV_INTERN
+void
+log_write_up_to(
+/*============*/
+	ib_uint64_t	lsn,	/*!< in: log sequence number up to which
+				the log should be written,
+				IB_ULONGLONG_MAX if not specified */
+	ulint		wait,	/*!< in: LOG_NO_WAIT, LOG_WAIT_ONE_GROUP,
+				or LOG_WAIT_ALL_GROUPS */
+	ibool		flush_to_disk);
+				/*!< in: TRUE if we want the written log
+				also to be flushed to disk */
+/****************************************************************//**
+Does a syncronous flush of the log buffer to disk. */
+UNIV_INTERN
+void
+log_buffer_flush_to_disk(void);
+/*==========================*/
+/****************************************************************//**
+This functions writes the log buffer to the log file and if 'flush'
+is set it forces a flush of the log file as well. This is meant to be
+called from background master thread only as it does not wait for
+the write (+ possible flush) to finish. */
+UNIV_INTERN
+void
+log_buffer_sync_in_background(
+/*==========================*/
+	ibool	flush);	/*<! in: flush the logs to disk */
+/****************************************************************//**
+Advances the smallest lsn for which there are unflushed dirty blocks in the
+buffer pool and also may make a new checkpoint. NOTE: this function may only
+be called if the calling thread owns no synchronization objects!
+@return FALSE if there was a flush batch of the same type running,
+which means that we could not start this flush batch */
+UNIV_INTERN
+ibool
+log_preflush_pool_modified_pages(
+/*=============================*/
+	ib_uint64_t	new_oldest,	/*!< in: try to advance
+					oldest_modified_lsn at least
+					to this lsn */
+	ibool		sync);		/*!< in: TRUE if synchronous
+					operation is desired */
+/******************************************************//**
+Makes a checkpoint. Note that this function does not flush dirty
+blocks from the buffer pool: it only checks what is lsn of the oldest
+modification in the pool, and writes information about the lsn in
+log files. Use log_make_checkpoint_at to flush also the pool.
+@return	TRUE if success, FALSE if a checkpoint write was already running */
+UNIV_INTERN
+ibool
+log_checkpoint(
+/*===========*/
+	ibool	sync,		/*!< in: TRUE if synchronous operation is
+				desired */
+	ibool	write_always);	/*!< in: the function normally checks if the
+				the new checkpoint would have a greater
+				lsn than the previous one: if not, then no
+				physical write is done; by setting this
+				parameter TRUE, a physical write will always be
+				made to log files */
+/****************************************************************//**
+Makes a checkpoint at a given lsn or later. */
+UNIV_INTERN
+void
+log_make_checkpoint_at(
+/*===================*/
+	ib_uint64_t	lsn,		/*!< in: make a checkpoint at this or a
+					later lsn, if IB_ULONGLONG_MAX, makes
+					a checkpoint at the latest lsn */
+	ibool		write_always);	/*!< in: the function normally checks if
+					the the new checkpoint would have a
+					greater lsn than the previous one: if
+					not, then no physical write is done;
+					by setting this parameter TRUE, a
+					physical write will always be made to
+					log files */
+/****************************************************************//**
+Makes a checkpoint at the latest lsn and writes it to first page of each
+data file in the database, so that we know that the file spaces contain
+all modifications up to that lsn. This can only be called at database
+shutdown. This function also writes all log in log files to the log archive. */
+UNIV_INTERN
+void
+logs_empty_and_mark_files_at_shutdown(void);
+/*=======================================*/
+/******************************************************//**
+Reads a checkpoint info from a log group header to log_sys->checkpoint_buf. */
+UNIV_INTERN
+void
+log_group_read_checkpoint_info(
+/*===========================*/
+	log_group_t*	group,	/*!< in: log group */
+	ulint		field);	/*!< in: LOG_CHECKPOINT_1 or LOG_CHECKPOINT_2 */
+/*******************************************************************//**
+Gets info from a checkpoint about a log group. */
+UNIV_INTERN
+void
+log_checkpoint_get_nth_group_info(
+/*==============================*/
+	const byte*	buf,	/*!< in: buffer containing checkpoint info */
+	ulint		n,	/*!< in: nth slot */
+	ulint*		file_no,/*!< out: archived file number */
+	ulint*		offset);/*!< out: archived file offset */
+/******************************************************//**
+Writes checkpoint info to groups. */
+UNIV_INTERN
+void
+log_groups_write_checkpoint_info(void);
+/*==================================*/
+/********************************************************************//**
+Starts an archiving operation.
+@return	TRUE if succeed, FALSE if an archiving operation was already running */
+UNIV_INTERN
+ibool
+log_archive_do(
+/*===========*/
+	ibool	sync,	/*!< in: TRUE if synchronous operation is desired */
+	ulint*	n_bytes);/*!< out: archive log buffer size, 0 if nothing to
+			archive */
+/****************************************************************//**
+Writes the log contents to the archive up to the lsn when this function was
+called, and stops the archiving. When archiving is started again, the archived
+log file numbers start from a number one higher, so that the archiving will
+not write again to the archived log files which exist when this function
+returns.
+@return	DB_SUCCESS or DB_ERROR */
+UNIV_INTERN
+ulint
+log_archive_stop(void);
+/*==================*/
+/****************************************************************//**
+Starts again archiving which has been stopped.
+@return	DB_SUCCESS or DB_ERROR */
+UNIV_INTERN
+ulint
+log_archive_start(void);
+/*===================*/
+/****************************************************************//**
+Stop archiving the log so that a gap may occur in the archived log files.
+@return	DB_SUCCESS or DB_ERROR */
+UNIV_INTERN
+ulint
+log_archive_noarchivelog(void);
+/*==========================*/
+/****************************************************************//**
+Start archiving the log so that a gap may occur in the archived log files.
+@return	DB_SUCCESS or DB_ERROR */
+UNIV_INTERN
+ulint
+log_archive_archivelog(void);
+/*========================*/
+/******************************************************//**
+Generates an archived log file name. */
+UNIV_INTERN
+void
+log_archived_file_name_gen(
+/*=======================*/
+	char*	buf,	/*!< in: buffer where to write */
+	ulint	id,	/*!< in: group id */
+	ulint	file_no);/*!< in: file number */
+#else /* !UNIV_HOTBACKUP */
+/******************************************************//**
+Writes info to a buffer of a log group when log files are created in
+backup restoration. */
+UNIV_INTERN
+void
+log_reset_first_header_and_checkpoint(
+/*==================================*/
+	byte*		hdr_buf,/*!< in: buffer which will be written to the
+				start of the first log file */
+	ib_uint64_t	start);	/*!< in: lsn of the start of the first log file;
+				we pretend that there is a checkpoint at
+				start + LOG_BLOCK_HDR_SIZE */
+#endif /* !UNIV_HOTBACKUP */
+/********************************************************************//**
+Checks that there is enough free space in the log to start a new query step.
+Flushes the log buffer or makes a new checkpoint if necessary. NOTE: this
+function may only be called if the calling thread owns no synchronization
+objects! */
+UNIV_INTERN
+void
+log_check_margins(void);
+/*===================*/
+#ifndef UNIV_HOTBACKUP
+/******************************************************//**
+Reads a specified log segment to a buffer. */
+UNIV_INTERN
+void
+log_group_read_log_seg(
+/*===================*/
+	ulint		type,		/*!< in: LOG_ARCHIVE or LOG_RECOVER */
+	byte*		buf,		/*!< in: buffer where to read */
+	log_group_t*	group,		/*!< in: log group */
+	ib_uint64_t	start_lsn,	/*!< in: read area start */
+	ib_uint64_t	end_lsn);	/*!< in: read area end */
+/******************************************************//**
+Writes a buffer to a log file group. */
+UNIV_INTERN
+void
+log_group_write_buf(
+/*================*/
+	log_group_t*	group,		/*!< in: log group */
+	byte*		buf,		/*!< in: buffer */
+	ulint		len,		/*!< in: buffer len; must be divisible
+					by OS_FILE_LOG_BLOCK_SIZE */
+	ib_uint64_t	start_lsn,	/*!< in: start lsn of the buffer; must
+					be divisible by
+					OS_FILE_LOG_BLOCK_SIZE */
+	ulint		new_data_offset);/*!< in: start offset of new data in
+					buf: this parameter is used to decide
+					if we have to write a new log file
+					header */
+/********************************************************//**
+Sets the field values in group to correspond to a given lsn. For this function
+to work, the values must already be correctly initialized to correspond to
+some lsn, for instance, a checkpoint lsn. */
+UNIV_INTERN
+void
+log_group_set_fields(
+/*=================*/
+	log_group_t*	group,	/*!< in/out: group */
+	ib_uint64_t	lsn);	/*!< in: lsn for which the values should be
+				set */
+/******************************************************//**
+Calculates the data capacity of a log group, when the log file headers are not
+included.
+@return	capacity in bytes */
+UNIV_INTERN
+ulint
+log_group_get_capacity(
+/*===================*/
+	const log_group_t*	group);	/*!< in: log group */
+#endif /* !UNIV_HOTBACKUP */
+/************************************************************//**
+Gets a log block flush bit.
+@return	TRUE if this block was the first to be written in a log flush */
+UNIV_INLINE
+ibool
+log_block_get_flush_bit(
+/*====================*/
+	const byte*	log_block);	/*!< in: log block */
+/************************************************************//**
+Gets a log block number stored in the header.
+@return	log block number stored in the block header */
+UNIV_INLINE
+ulint
+log_block_get_hdr_no(
+/*=================*/
+	const byte*	log_block);	/*!< in: log block */
+/************************************************************//**
+Gets a log block data length.
+@return	log block data length measured as a byte offset from the block start */
+UNIV_INLINE
+ulint
+log_block_get_data_len(
+/*===================*/
+	const byte*	log_block);	/*!< in: log block */
+/************************************************************//**
+Sets the log block data length. */
+UNIV_INLINE
+void
+log_block_set_data_len(
+/*===================*/
+	byte*	log_block,	/*!< in/out: log block */
+	ulint	len);		/*!< in: data length */
+/************************************************************//**
+Calculates the checksum for a log block.
+@return	checksum */
+UNIV_INLINE
+ulint
+log_block_calc_checksum(
+/*====================*/
+	const byte*	block);	/*!< in: log block */
+/************************************************************//**
+Gets a log block checksum field value.
+@return	checksum */
+UNIV_INLINE
+ulint
+log_block_get_checksum(
+/*===================*/
+	const byte*	log_block);	/*!< in: log block */
+/************************************************************//**
+Sets a log block checksum field value. */
+UNIV_INLINE
+void
+log_block_set_checksum(
+/*===================*/
+	byte*	log_block,	/*!< in/out: log block */
+	ulint	checksum);	/*!< in: checksum */
+/************************************************************//**
+Gets a log block first mtr log record group offset.
+@return first mtr log record group byte offset from the block start, 0
+if none */
+UNIV_INLINE
+ulint
+log_block_get_first_rec_group(
+/*==========================*/
+	const byte*	log_block);	/*!< in: log block */
+/************************************************************//**
+Sets the log block first mtr log record group offset. */
+UNIV_INLINE
+void
+log_block_set_first_rec_group(
+/*==========================*/
+	byte*	log_block,	/*!< in/out: log block */
+	ulint	offset);	/*!< in: offset, 0 if none */
+/************************************************************//**
+Gets a log block checkpoint number field (4 lowest bytes).
+@return	checkpoint no (4 lowest bytes) */
+UNIV_INLINE
+ulint
+log_block_get_checkpoint_no(
+/*========================*/
+	const byte*	log_block);	/*!< in: log block */
+/************************************************************//**
+Initializes a log block in the log buffer. */
+UNIV_INLINE
+void
+log_block_init(
+/*===========*/
+	byte*		log_block,	/*!< in: pointer to the log buffer */
+	ib_uint64_t	lsn);		/*!< in: lsn within the log block */
+/************************************************************//**
+Initializes a log block in the log buffer in the old, < 3.23.52 format, where
+there was no checksum yet. */
+UNIV_INLINE
+void
+log_block_init_in_old_format(
+/*=========================*/
+	byte*		log_block,	/*!< in: pointer to the log buffer */
+	ib_uint64_t	lsn);		/*!< in: lsn within the log block */
+/************************************************************//**
+Converts a lsn to a log block number.
+@return	log block number, it is > 0 and <= 1G */
+UNIV_INLINE
+ulint
+log_block_convert_lsn_to_no(
+/*========================*/
+	ib_uint64_t	lsn);	/*!< in: lsn of a byte within the block */
+/******************************************************//**
+Prints info of the log. */
+UNIV_INTERN
+void
+log_print(
+/*======*/
+	FILE*	file);	/*!< in: file where to print */
+/******************************************************//**
+Peeks the current lsn.
+@return	TRUE if success, FALSE if could not get the log system mutex */
+UNIV_INTERN
+ibool
+log_peek_lsn(
+/*=========*/
+	ib_uint64_t*	lsn);	/*!< out: if returns TRUE, current lsn is here */
+/**********************************************************************//**
+Refreshes the statistics used to print per-second averages. */
+UNIV_INTERN
+void
+log_refresh_stats(void);
+/*===================*/
+
+extern log_t*	log_sys;
+
+/* Values used as flags */
+#define LOG_FLUSH	7652559
+#define LOG_CHECKPOINT	78656949
+#ifdef UNIV_LOG_ARCHIVE
+# define LOG_ARCHIVE	11122331
+#endif /* UNIV_LOG_ARCHIVE */
+#define LOG_RECOVER	98887331
+
+/* The counting of lsn's starts from this value: this must be non-zero */
+#define LOG_START_LSN	((ib_uint64_t) (16 * OS_FILE_LOG_BLOCK_SIZE))
+
+#define LOG_BUFFER_SIZE		(srv_log_buffer_size * UNIV_PAGE_SIZE)
+#define LOG_ARCHIVE_BUF_SIZE	(srv_log_buffer_size * UNIV_PAGE_SIZE / 4)
+
+/* Offsets of a log block header */
+#define	LOG_BLOCK_HDR_NO	0	/* block number which must be > 0 and
+					is allowed to wrap around at 2G; the
+					highest bit is set to 1 if this is the
+					first log block in a log flush write
+					segment */
+#define LOG_BLOCK_FLUSH_BIT_MASK 0x80000000UL
+					/* mask used to get the highest bit in
+					the preceding field */
+#define	LOG_BLOCK_HDR_DATA_LEN	4	/* number of bytes of log written to
+					this block */
+#define	LOG_BLOCK_FIRST_REC_GROUP 6	/* offset of the first start of an
+					mtr log record group in this log block,
+					0 if none; if the value is the same
+					as LOG_BLOCK_HDR_DATA_LEN, it means
+					that the first rec group has not yet
+					been catenated to this log block, but
+					if it will, it will start at this
+					offset; an archive recovery can
+					start parsing the log records starting
+					from this offset in this log block,
+					if value not 0 */
+#define LOG_BLOCK_CHECKPOINT_NO	8	/* 4 lower bytes of the value of
+					log_sys->next_checkpoint_no when the
+					log block was last written to: if the
+					block has not yet been written full,
+					this value is only updated before a
+					log buffer flush */
+#define LOG_BLOCK_HDR_SIZE	12	/* size of the log block header in
+					bytes */
+
+/* Offsets of a log block trailer from the end of the block */
+#define	LOG_BLOCK_CHECKSUM	4	/* 4 byte checksum of the log block
+					contents; in InnoDB versions
+					< 3.23.52 this did not contain the
+					checksum but the same value as
+					.._HDR_NO */
+#define	LOG_BLOCK_TRL_SIZE	4	/* trailer size in bytes */
+
+/* Offsets for a checkpoint field */
+#define LOG_CHECKPOINT_NO		0
+#define LOG_CHECKPOINT_LSN		8
+#define LOG_CHECKPOINT_OFFSET		16
+#define LOG_CHECKPOINT_LOG_BUF_SIZE	20
+#define	LOG_CHECKPOINT_ARCHIVED_LSN	24
+#define	LOG_CHECKPOINT_GROUP_ARRAY	32
+
+/* For each value smaller than LOG_MAX_N_GROUPS the following 8 bytes: */
+
+#define LOG_CHECKPOINT_ARCHIVED_FILE_NO	0
+#define LOG_CHECKPOINT_ARCHIVED_OFFSET	4
+
+#define	LOG_CHECKPOINT_ARRAY_END	(LOG_CHECKPOINT_GROUP_ARRAY\
+							+ LOG_MAX_N_GROUPS * 8)
+#define LOG_CHECKPOINT_CHECKSUM_1	LOG_CHECKPOINT_ARRAY_END
+#define LOG_CHECKPOINT_CHECKSUM_2	(4 + LOG_CHECKPOINT_ARRAY_END)
+#define LOG_CHECKPOINT_FSP_FREE_LIMIT	(8 + LOG_CHECKPOINT_ARRAY_END)
+					/* current fsp free limit in
+					tablespace 0, in units of one
+					megabyte; this information is only used
+					by ibbackup to decide if it can
+					truncate unused ends of
+					non-auto-extending data files in space
+					0 */
+#define LOG_CHECKPOINT_FSP_MAGIC_N	(12 + LOG_CHECKPOINT_ARRAY_END)
+					/* this magic number tells if the
+					checkpoint contains the above field:
+					the field was added to
+					InnoDB-3.23.50 */
+#define LOG_CHECKPOINT_SIZE		(16 + LOG_CHECKPOINT_ARRAY_END)
+
+#define LOG_CHECKPOINT_FSP_MAGIC_N_VAL	1441231243
+
+/* Offsets of a log file header */
+#define LOG_GROUP_ID		0	/* log group number */
+#define LOG_FILE_START_LSN	4	/* lsn of the start of data in this
+					log file */
+#define LOG_FILE_NO		12	/* 4-byte archived log file number;
+					this field is only defined in an
+					archived log file */
+#define LOG_FILE_WAS_CREATED_BY_HOT_BACKUP 16
+					/* a 32-byte field which contains
+					the string 'ibbackup' and the
+					creation time if the log file was
+					created by ibbackup --restore;
+					when mysqld is first time started
+					on the restored database, it can
+					print helpful info for the user */
+#define	LOG_FILE_ARCH_COMPLETED	OS_FILE_LOG_BLOCK_SIZE
+					/* this 4-byte field is TRUE when
+					the writing of an archived log file
+					has been completed; this field is
+					only defined in an archived log file */
+#define LOG_FILE_END_LSN	(OS_FILE_LOG_BLOCK_SIZE + 4)
+					/* lsn where the archived log file
+					at least extends: actually the
+					archived log file may extend to a
+					later lsn, as long as it is within the
+					same log block as this lsn; this field
+					is defined only when an archived log
+					file has been completely written */
+#define LOG_CHECKPOINT_1	OS_FILE_LOG_BLOCK_SIZE
+					/* first checkpoint field in the log
+					header; we write alternately to the
+					checkpoint fields when we make new
+					checkpoints; this field is only defined
+					in the first log file of a log group */
+#define LOG_CHECKPOINT_2	(3 * OS_FILE_LOG_BLOCK_SIZE)
+					/* second checkpoint field in the log
+					header */
+#define LOG_FILE_HDR_SIZE	(4 * OS_FILE_LOG_BLOCK_SIZE)
+
+#define LOG_GROUP_OK		301
+#define LOG_GROUP_CORRUPTED	302
+
+/** Log group consists of a number of log files, each of the same size; a log
+group is implemented as a space in the sense of the module fil0fil. */
+struct log_group_struct{
+	/* The following fields are protected by log_sys->mutex */
+	ulint		id;		/*!< log group id */
+	ulint		n_files;	/*!< number of files in the group */
+	ulint		file_size;	/*!< individual log file size in bytes,
+					including the log file header */
+	ulint		space_id;	/*!< file space which implements the log
+					group */
+	ulint		state;		/*!< LOG_GROUP_OK or
+					LOG_GROUP_CORRUPTED */
+	ib_uint64_t	lsn;		/*!< lsn used to fix coordinates within
+					the log group */
+	ulint		lsn_offset;	/*!< the offset of the above lsn */
+	ulint		n_pending_writes;/*!< number of currently pending flush
+					writes for this log group */
+	byte**		file_header_bufs;/*!< buffers for each file
+					header in the group */
+	/*-----------------------------*/
+	byte**		archive_file_header_bufs;/*!< buffers for each file
+					header in the group */
+	ulint		archive_space_id;/*!< file space which
+					implements the log group
+					archive */
+	ulint		archived_file_no;/*!< file number corresponding to
+					log_sys->archived_lsn */
+	ulint		archived_offset;/*!< file offset corresponding to
+					log_sys->archived_lsn, 0 if we have
+					not yet written to the archive file
+					number archived_file_no */
+	ulint		next_archived_file_no;/*!< during an archive write,
+					until the write is completed, we
+					store the next value for
+					archived_file_no here: the write
+					completion function then sets the new
+					value to ..._file_no */
+	ulint		next_archived_offset; /*!< like the preceding field */
+	/*-----------------------------*/
+	ib_uint64_t	scanned_lsn;	/*!< used only in recovery: recovery scan
+					succeeded up to this lsn in this log
+					group */
+	byte*		checkpoint_buf;	/*!< checkpoint header is written from
+					this buffer to the group */
+	UT_LIST_NODE_T(log_group_t)
+			log_groups;	/*!< list of log groups */
+};
+
+/** Redo log buffer */
+struct log_struct{
+	byte		pad[64];	/*!< padding to prevent other memory
+					update hotspots from residing on the
+					same memory cache line */
+	ib_uint64_t	lsn;		/*!< log sequence number */
+	ulint		buf_free;	/*!< first free offset within the log
+					buffer */
+#ifndef UNIV_HOTBACKUP
+	mutex_t		mutex;		/*!< mutex protecting the log */
+#endif /* !UNIV_HOTBACKUP */
+	byte*		buf;		/*!< log buffer */
+	ulint		buf_size;	/*!< log buffer size in bytes */
+	ulint		max_buf_free;	/*!< recommended maximum value of
+					buf_free, after which the buffer is
+					flushed */
+	ulint		old_buf_free;	/*!< value of buf free when log was
+					last time opened; only in the debug
+					version */
+	ib_uint64_t	old_lsn;	/*!< value of lsn when log was
+					last time opened; only in the
+					debug version */
+	ibool		check_flush_or_checkpoint;
+					/*!< this is set to TRUE when there may
+					be need to flush the log buffer, or
+					preflush buffer pool pages, or make
+					a checkpoint; this MUST be TRUE when
+					lsn - last_checkpoint_lsn >
+					max_checkpoint_age; this flag is
+					peeked at by log_free_check(), which
+					does not reserve the log mutex */
+	UT_LIST_BASE_NODE_T(log_group_t)
+			log_groups;	/*!< log groups */
+
+#ifndef UNIV_HOTBACKUP
+	/** The fields involved in the log buffer flush @{ */
+
+	ulint		buf_next_to_write;/*!< first offset in the log buffer
+					where the byte content may not exist
+					written to file, e.g., the start
+					offset of a log record catenated
+					later; this is advanced when a flush
+					operation is completed to all the log
+					groups */
+	ib_uint64_t	written_to_some_lsn;
+					/*!< first log sequence number not yet
+					written to any log group; for this to
+					be advanced, it is enough that the
+					write i/o has been completed for any
+					one log group */
+	ib_uint64_t	written_to_all_lsn;
+					/*!< first log sequence number not yet
+					written to some log group; for this to
+					be advanced, it is enough that the
+					write i/o has been completed for all
+					log groups */
+	ib_uint64_t	write_lsn;	/*!< end lsn for the current running
+					write */
+	ulint		write_end_offset;/*!< the data in buffer has
+					been written up to this offset
+					when the current write ends:
+					this field will then be copied
+					to buf_next_to_write */
+	ib_uint64_t	current_flush_lsn;/*!< end lsn for the current running
+					write + flush operation */
+	ib_uint64_t	flushed_to_disk_lsn;
+					/*!< how far we have written the log
+					AND flushed to disk */
+	ulint		n_pending_writes;/*!< number of currently
+					pending flushes or writes */
+	/* NOTE on the 'flush' in names of the fields below: starting from
+	4.0.14, we separate the write of the log file and the actual fsync()
+	or other method to flush it to disk. The names below shhould really
+	be 'flush_or_write'! */
+	os_event_t	no_flush_event;	/*!< this event is in the reset state
+					when a flush or a write is running;
+					a thread should wait for this without
+					owning the log mutex, but NOTE that
+					to set or reset this event, the
+					thread MUST own the log mutex! */
+	ibool		one_flushed;	/*!< during a flush, this is
+					first FALSE and becomes TRUE
+					when one log group has been
+					written or flushed */
+	os_event_t	one_flushed_event;/*!< this event is reset when the
+					flush or write has not yet completed
+					for any log group; e.g., this means
+					that a transaction has been committed
+					when this is set; a thread should wait
+					for this without owning the log mutex,
+					but NOTE that to set or reset this
+					event, the thread MUST own the log
+					mutex! */
+	ulint		n_log_ios;	/*!< number of log i/os initiated thus
+					far */
+	ulint		n_log_ios_old;	/*!< number of log i/o's at the
+					previous printout */
+	time_t		last_printout_time;/*!< when log_print was last time
+					called */
+	/* @} */
+
+	/** Fields involved in checkpoints @{ */
+	ulint		log_group_capacity; /*!< capacity of the log group; if
+					the checkpoint age exceeds this, it is
+					a serious error because it is possible
+					we will then overwrite log and spoil
+					crash recovery */
+	ulint		max_modified_age_async;
+					/*!< when this recommended
+					value for lsn -
+					buf_pool_get_oldest_modification()
+					is exceeded, we start an
+					asynchronous preflush of pool pages */
+	ulint		max_modified_age_sync;
+					/*!< when this recommended
+					value for lsn -
+					buf_pool_get_oldest_modification()
+					is exceeded, we start a
+					synchronous preflush of pool pages */
+	ulint		adm_checkpoint_interval;
+					/*!< administrator-specified checkpoint
+					interval in terms of log growth in
+					bytes; the interval actually used by
+					the database can be smaller */
+	ulint		max_checkpoint_age_async;
+					/*!< when this checkpoint age
+					is exceeded we start an
+					asynchronous writing of a new
+					checkpoint */
+	ulint		max_checkpoint_age;
+					/*!< this is the maximum allowed value
+					for lsn - last_checkpoint_lsn when a
+					new query step is started */
+	ib_uint64_t	next_checkpoint_no;
+					/*!< next checkpoint number */
+	ib_uint64_t	last_checkpoint_lsn;
+					/*!< latest checkpoint lsn */
+	ib_uint64_t	next_checkpoint_lsn;
+					/*!< next checkpoint lsn */
+	ulint		n_pending_checkpoint_writes;
+					/*!< number of currently pending
+					checkpoint writes */
+	rw_lock_t	checkpoint_lock;/*!< this latch is x-locked when a
+					checkpoint write is running; a thread
+					should wait for this without owning
+					the log mutex */
+#endif /* !UNIV_HOTBACKUP */
+	byte*		checkpoint_buf;	/*!< checkpoint header is read to this
+					buffer */
+	/* @} */
+#ifdef UNIV_LOG_ARCHIVE
+	/** Fields involved in archiving @{ */
+	ulint		archiving_state;/*!< LOG_ARCH_ON, LOG_ARCH_STOPPING
+					LOG_ARCH_STOPPED, LOG_ARCH_OFF */
+	ib_uint64_t	archived_lsn;	/*!< archiving has advanced to this
+					lsn */
+	ulint		max_archived_lsn_age_async;
+					/*!< recommended maximum age of
+					archived_lsn, before we start
+					asynchronous copying to the archive */
+	ulint		max_archived_lsn_age;
+					/*!< maximum allowed age for
+					archived_lsn */
+	ib_uint64_t	next_archived_lsn;/*!< during an archive write,
+					until the write is completed, we
+					store the next value for
+					archived_lsn here: the write
+					completion function then sets the new
+					value to archived_lsn */
+	ulint		archiving_phase;/*!< LOG_ARCHIVE_READ or
+					LOG_ARCHIVE_WRITE */
+	ulint		n_pending_archive_ios;
+					/*!< number of currently pending reads
+					or writes in archiving */
+	rw_lock_t	archive_lock;	/*!< this latch is x-locked when an
+					archive write is running; a thread
+					should wait for this without owning
+					the log mutex */
+	ulint		archive_buf_size;/*!< size of archive_buf */
+	byte*		archive_buf;	/*!< log segment is written to the
+					archive from this buffer */
+	os_event_t	archiving_on;	/*!< if archiving has been stopped,
+					a thread can wait for this event to
+					become signaled */
+	/* @} */
+#endif /* UNIV_LOG_ARCHIVE */
+};
+
+#ifdef UNIV_LOG_ARCHIVE
+/** Archiving state @{ */
+#define LOG_ARCH_ON		71
+#define LOG_ARCH_STOPPING	72
+#define LOG_ARCH_STOPPING2	73
+#define LOG_ARCH_STOPPED	74
+#define LOG_ARCH_OFF		75
+/* @} */
+#endif /* UNIV_LOG_ARCHIVE */
+
+#ifndef UNIV_NONINL
+#include "log0log.ic"
+#endif
+
+#endif