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/*****************************************************************************
Copyright (c) 1995, 2009, 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 include/fsp0types.h
File space management types
Created May 26, 2009 Vasil Dimov
*******************************************************/
#ifndef fsp0types_h
#define fsp0types_h
#include "univ.i"
#include "fil0fil.h" /* for FIL_PAGE_DATA */
#include "ut0byte.h"
/** @name Flags for inserting records in order
If records are inserted in order, there are the following
flags to tell this (their type is made byte for the compiler
to warn if direction and hint parameters are switched in
fseg_alloc_free_page) */
/* @{ */
#define FSP_UP ((byte)111) /*!< alphabetically upwards */
#define FSP_DOWN ((byte)112) /*!< alphabetically downwards */
#define FSP_NO_DIR ((byte)113) /*!< no order */
/* @} */
/** File space extent size (one megabyte) in pages */
#define FSP_EXTENT_SIZE (1048576U / UNIV_PAGE_SIZE)
/** File space extent size (one megabyte) in pages for MAX page size */
#define FSP_EXTENT_SIZE_MAX (1048576 / UNIV_PAGE_SIZE_MAX)
/** File space extent size (one megabyte) in pages for MIN page size */
#define FSP_EXTENT_SIZE_MIN (1048576 / UNIV_PAGE_SIZE_MIN)
/** On a page of any file segment, data may be put starting from this
offset */
#define FSEG_PAGE_DATA FIL_PAGE_DATA
/** @name File segment header
The file segment header points to the inode describing the file segment. */
/* @{ */
/** Data type for file segment header */
typedef byte fseg_header_t;
#define FSEG_HDR_SPACE 0 /*!< space id of the inode */
#define FSEG_HDR_PAGE_NO 4 /*!< page number of the inode */
#define FSEG_HDR_OFFSET 8 /*!< byte offset of the inode */
#define FSEG_HEADER_SIZE 10 /*!< Length of the file system
header, in bytes */
/* @} */
/** Flags for fsp_reserve_free_extents @{ */
#define FSP_NORMAL 1000000
#define FSP_UNDO 2000000
#define FSP_CLEANING 3000000
/* @} */
/* Number of pages described in a single descriptor page: currently each page
description takes less than 1 byte; a descriptor page is repeated every
this many file pages */
/* #define XDES_DESCRIBED_PER_PAGE UNIV_PAGE_SIZE */
/* This has been replaced with either UNIV_PAGE_SIZE or page_zip->size. */
/** @name The space low address page map
The pages at FSP_XDES_OFFSET and FSP_IBUF_BITMAP_OFFSET are repeated
every XDES_DESCRIBED_PER_PAGE pages in every tablespace. */
/* @{ */
/*--------------------------------------*/
#define FSP_XDES_OFFSET 0 /* !< extent descriptor */
#define FSP_IBUF_BITMAP_OFFSET 1 /* !< insert buffer bitmap */
/* The ibuf bitmap pages are the ones whose
page number is the number above plus a
multiple of XDES_DESCRIBED_PER_PAGE */
#define FSP_FIRST_INODE_PAGE_NO 2 /*!< in every tablespace */
/* The following pages exist
in the system tablespace (space 0). */
#define FSP_IBUF_HEADER_PAGE_NO 3 /*!< insert buffer
header page, in
tablespace 0 */
#define FSP_IBUF_TREE_ROOT_PAGE_NO 4 /*!< insert buffer
B-tree root page in
tablespace 0 */
/* The ibuf tree root page number in
tablespace 0; its fseg inode is on the page
number FSP_FIRST_INODE_PAGE_NO */
#define FSP_TRX_SYS_PAGE_NO 5 /*!< transaction
system header, in
tablespace 0 */
#define FSP_FIRST_RSEG_PAGE_NO 6 /*!< first rollback segment
page, in tablespace 0 */
#define FSP_DICT_HDR_PAGE_NO 7 /*!< data dictionary header
page, in tablespace 0 */
/*--------------------------------------*/
/* @} */
#endif /* fsp0types_h */
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