1 /***************************************************************************** 2 3 Copyright (c) 1995, 2009, Oracle and/or its affiliates. All Rights Reserved. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License, version 2.0, 7 as published by the Free Software Foundation. 8 9 This program is also distributed with certain software (including 10 but not limited to OpenSSL) that is licensed under separate terms, 11 as designated in a particular file or component or in included license 12 documentation. The authors of MySQL hereby grant you an additional 13 permission to link the program and your derivative works with the 14 separately licensed software that they have included with MySQL. 15 16 This program is distributed in the hope that it will be useful, 17 but WITHOUT ANY WARRANTY; without even the implied warranty of 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 GNU General Public License, version 2.0, for more details. 20 21 You should have received a copy of the GNU General Public License along with 22 this program; if not, write to the Free Software Foundation, Inc., 23 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA 24 25 *****************************************************************************/ 26 27 /****************************************************** 28 @file include/fsp0types.h 29 File space management types 30 31 Created May 26, 2009 Vasil Dimov 32 *******************************************************/ 33 34 #ifndef fsp0types_h 35 #define fsp0types_h 36 37 #include "univ.i" 38 39 #include "fil0fil.h" /* for FIL_PAGE_DATA */ 40 41 /** @name Flags for inserting records in order 42 If records are inserted in order, there are the following 43 flags to tell this (their type is made byte for the compiler 44 to warn if direction and hint parameters are switched in 45 fseg_alloc_free_page) */ 46 /* @{ */ 47 #define FSP_UP ((byte)111) /*!< alphabetically upwards */ 48 #define FSP_DOWN ((byte)112) /*!< alphabetically downwards */ 49 #define FSP_NO_DIR ((byte)113) /*!< no order */ 50 /* @} */ 51 52 /** File space extent size (one megabyte) in pages */ 53 #define FSP_EXTENT_SIZE (1048576U / UNIV_PAGE_SIZE) 54 55 /** File space extent size (one megabyte) in pages for MAX page size */ 56 #define FSP_EXTENT_SIZE_MAX (1048576 / UNIV_PAGE_SIZE_MAX) 57 58 /** File space extent size (one megabyte) in pages for MIN page size */ 59 #define FSP_EXTENT_SIZE_MIN (1048576 / UNIV_PAGE_SIZE_MIN) 60 61 /** On a page of any file segment, data may be put starting from this 62 offset */ 63 #define FSEG_PAGE_DATA FIL_PAGE_DATA 64 65 /** @name File segment header 66 The file segment header points to the inode describing the file segment. */ 67 /* @{ */ 68 /** Data type for file segment header */ 69 typedef byte fseg_header_t; 70 71 #define FSEG_HDR_SPACE 0 /*!< space id of the inode */ 72 #define FSEG_HDR_PAGE_NO 4 /*!< page number of the inode */ 73 #define FSEG_HDR_OFFSET 8 /*!< byte offset of the inode */ 74 75 #define FSEG_HEADER_SIZE 10 /*!< Length of the file system 76 header, in bytes */ 77 /* @} */ 78 79 /** Flags for fsp_reserve_free_extents @{ */ 80 #define FSP_NORMAL 1000000 81 #define FSP_UNDO 2000000 82 #define FSP_CLEANING 3000000 83 /* @} */ 84 85 /* Number of pages described in a single descriptor page: currently each page 86 description takes less than 1 byte; a descriptor page is repeated every 87 this many file pages */ 88 /* #define XDES_DESCRIBED_PER_PAGE UNIV_PAGE_SIZE */ 89 /* This has been replaced with either UNIV_PAGE_SIZE or page_zip->size. */ 90 91 /** @name The space low address page map 92 The pages at FSP_XDES_OFFSET and FSP_IBUF_BITMAP_OFFSET are repeated 93 every XDES_DESCRIBED_PER_PAGE pages in every tablespace. */ 94 /* @{ */ 95 /*--------------------------------------*/ 96 #define FSP_XDES_OFFSET 0 /* !< extent descriptor */ 97 #define FSP_IBUF_BITMAP_OFFSET 1 /* !< insert buffer bitmap */ 98 /* The ibuf bitmap pages are the ones whose 99 page number is the number above plus a 100 multiple of XDES_DESCRIBED_PER_PAGE */ 101 102 #define FSP_FIRST_INODE_PAGE_NO 2 /*!< in every tablespace */ 103 /* The following pages exist 104 in the system tablespace (space 0). */ 105 #define FSP_IBUF_HEADER_PAGE_NO 3 /*!< insert buffer 106 header page, in 107 tablespace 0 */ 108 #define FSP_IBUF_TREE_ROOT_PAGE_NO 4 /*!< insert buffer 109 B-tree root page in 110 tablespace 0 */ 111 /* The ibuf tree root page number in 112 tablespace 0; its fseg inode is on the page 113 number FSP_FIRST_INODE_PAGE_NO */ 114 #define FSP_TRX_SYS_PAGE_NO 5 /*!< transaction 115 system header, in 116 tablespace 0 */ 117 #define FSP_FIRST_RSEG_PAGE_NO 6 /*!< first rollback segment 118 page, in tablespace 0 */ 119 #define FSP_DICT_HDR_PAGE_NO 7 /*!< data dictionary header 120 page, in tablespace 0 */ 121 /*--------------------------------------*/ 122 /* @} */ 123 124 #endif /* fsp0types_h */ 125