00001 /*- 00002 * See the file LICENSE for redistribution information. 00003 * 00004 * Copyright (c) 1996-2005 00005 * Sleepycat Software. All rights reserved. 00006 * 00007 * $Id: db_upgrade.h,v 12.1 2005/06/16 20:21:47 bostic Exp $ 00008 */ 00009 00010 #ifndef _DB_UPGRADE_H_ 00011 #define _DB_UPGRADE_H_ 00012 00013 /* 00014 * This file defines the metadata pages from the previous release. 00015 * These structures are only used to upgrade old versions of databases. 00016 */ 00017 00018 /* Structures from the 3.1 release */ 00019 typedef struct _dbmeta31 { 00020 DB_LSN lsn; /* 00-07: LSN. */ 00021 db_pgno_t pgno; /* 08-11: Current page number. */ 00022 u_int32_t magic; /* 12-15: Magic number. */ 00023 u_int32_t version; /* 16-19: Version. */ 00024 u_int32_t pagesize; /* 20-23: Pagesize. */ 00025 u_int8_t unused1[1]; /* 24: Unused. */ 00026 u_int8_t type; /* 25: Page type. */ 00027 u_int8_t unused2[2]; /* 26-27: Unused. */ 00028 u_int32_t free; /* 28-31: Free list page number. */ 00029 DB_LSN unused3; /* 36-39: Unused. */ 00030 u_int32_t key_count; /* 40-43: Cached key count. */ 00031 u_int32_t record_count; /* 44-47: Cached record count. */ 00032 u_int32_t flags; /* 48-51: Flags: unique to each AM. */ 00033 /* 52-71: Unique file ID. */ 00034 u_int8_t uid[DB_FILE_ID_LEN]; 00035 } DBMETA31; 00036 00037 typedef struct _btmeta31 { 00038 DBMETA31 dbmeta; /* 00-71: Generic meta-data header. */ 00039 00040 u_int32_t maxkey; /* 72-75: Btree: Maxkey. */ 00041 u_int32_t minkey; /* 76-79: Btree: Minkey. */ 00042 u_int32_t re_len; /* 80-83: Recno: fixed-length record length. */ 00043 u_int32_t re_pad; /* 84-87: Recno: fixed-length record pad. */ 00044 u_int32_t root; /* 88-92: Root page. */ 00045 00046 /* 00047 * Minimum page size is 128. 00048 */ 00049 } BTMETA31; 00050 00051 /************************************************************************ 00052 HASH METADATA PAGE LAYOUT 00053 ************************************************************************/ 00054 typedef struct _hashmeta31 { 00055 DBMETA31 dbmeta; /* 00-71: Generic meta-data page header. */ 00056 00057 u_int32_t max_bucket; /* 72-75: ID of Maximum bucket in use */ 00058 u_int32_t high_mask; /* 76-79: Modulo mask into table */ 00059 u_int32_t low_mask; /* 80-83: Modulo mask into table lower half */ 00060 u_int32_t ffactor; /* 84-87: Fill factor */ 00061 u_int32_t nelem; /* 88-91: Number of keys in hash table */ 00062 u_int32_t h_charkey; /* 92-95: Value of hash(CHARKEY) */ 00063 #define NCACHED 32 /* number of spare points */ 00064 /* 96-223: Spare pages for overflow */ 00065 u_int32_t spares[NCACHED]; 00066 00067 /* 00068 * Minimum page size is 256. 00069 */ 00070 } HMETA31; 00071 00072 /* 00073 * QAM Meta data page structure 00074 * 00075 */ 00076 typedef struct _qmeta31 { 00077 DBMETA31 dbmeta; /* 00-71: Generic meta-data header. */ 00078 00079 u_int32_t start; /* 72-75: Start offset. */ 00080 u_int32_t first_recno; /* 76-79: First not deleted record. */ 00081 u_int32_t cur_recno; /* 80-83: Last recno allocated. */ 00082 u_int32_t re_len; /* 84-87: Fixed-length record length. */ 00083 u_int32_t re_pad; /* 88-91: Fixed-length record pad. */ 00084 u_int32_t rec_page; /* 92-95: Records Per Page. */ 00085 00086 /* 00087 * Minimum page size is 128. 00088 */ 00089 } QMETA31; 00090 /* Structures from the 3.2 release */ 00091 typedef struct _qmeta32 { 00092 DBMETA31 dbmeta; /* 00-71: Generic meta-data header. */ 00093 00094 u_int32_t first_recno; /* 72-75: First not deleted record. */ 00095 u_int32_t cur_recno; /* 76-79: Last recno allocated. */ 00096 u_int32_t re_len; /* 80-83: Fixed-length record length. */ 00097 u_int32_t re_pad; /* 84-87: Fixed-length record pad. */ 00098 u_int32_t rec_page; /* 88-91: Records Per Page. */ 00099 u_int32_t page_ext; /* 92-95: Pages per extent */ 00100 00101 /* 00102 * Minimum page size is 128. 00103 */ 00104 } QMETA32; 00105 00106 /* Structures from the 3.0 release */ 00107 00108 typedef struct _dbmeta30 { 00109 DB_LSN lsn; /* 00-07: LSN. */ 00110 db_pgno_t pgno; /* 08-11: Current page number. */ 00111 u_int32_t magic; /* 12-15: Magic number. */ 00112 u_int32_t version; /* 16-19: Version. */ 00113 u_int32_t pagesize; /* 20-23: Pagesize. */ 00114 u_int8_t unused1[1]; /* 24: Unused. */ 00115 u_int8_t type; /* 25: Page type. */ 00116 u_int8_t unused2[2]; /* 26-27: Unused. */ 00117 u_int32_t free; /* 28-31: Free list page number. */ 00118 u_int32_t flags; /* 32-35: Flags: unique to each AM. */ 00119 /* 36-55: Unique file ID. */ 00120 u_int8_t uid[DB_FILE_ID_LEN]; 00121 } DBMETA30; 00122 00123 /************************************************************************ 00124 BTREE METADATA PAGE LAYOUT 00125 ************************************************************************/ 00126 typedef struct _btmeta30 { 00127 DBMETA30 dbmeta; /* 00-55: Generic meta-data header. */ 00128 00129 u_int32_t maxkey; /* 56-59: Btree: Maxkey. */ 00130 u_int32_t minkey; /* 60-63: Btree: Minkey. */ 00131 u_int32_t re_len; /* 64-67: Recno: fixed-length record length. */ 00132 u_int32_t re_pad; /* 68-71: Recno: fixed-length record pad. */ 00133 u_int32_t root; /* 72-75: Root page. */ 00134 00135 /* 00136 * Minimum page size is 128. 00137 */ 00138 } BTMETA30; 00139 00140 /************************************************************************ 00141 HASH METADATA PAGE LAYOUT 00142 ************************************************************************/ 00143 typedef struct _hashmeta30 { 00144 DBMETA30 dbmeta; /* 00-55: Generic meta-data page header. */ 00145 00146 u_int32_t max_bucket; /* 56-59: ID of Maximum bucket in use */ 00147 u_int32_t high_mask; /* 60-63: Modulo mask into table */ 00148 u_int32_t low_mask; /* 64-67: Modulo mask into table lower half */ 00149 u_int32_t ffactor; /* 68-71: Fill factor */ 00150 u_int32_t nelem; /* 72-75: Number of keys in hash table */ 00151 u_int32_t h_charkey; /* 76-79: Value of hash(CHARKEY) */ 00152 #define NCACHED30 32 /* number of spare points */ 00153 /* 80-207: Spare pages for overflow */ 00154 u_int32_t spares[NCACHED30]; 00155 00156 /* 00157 * Minimum page size is 256. 00158 */ 00159 } HMETA30; 00160 00161 /************************************************************************ 00162 QUEUE METADATA PAGE LAYOUT 00163 ************************************************************************/ 00164 /* 00165 * QAM Meta data page structure 00166 * 00167 */ 00168 typedef struct _qmeta30 { 00169 DBMETA30 dbmeta; /* 00-55: Generic meta-data header. */ 00170 00171 u_int32_t start; /* 56-59: Start offset. */ 00172 u_int32_t first_recno; /* 60-63: First not deleted record. */ 00173 u_int32_t cur_recno; /* 64-67: Last recno allocated. */ 00174 u_int32_t re_len; /* 68-71: Fixed-length record length. */ 00175 u_int32_t re_pad; /* 72-75: Fixed-length record pad. */ 00176 u_int32_t rec_page; /* 76-79: Records Per Page. */ 00177 00178 /* 00179 * Minimum page size is 128. 00180 */ 00181 } QMETA30; 00182 00183 /* Structures from Release 2.x */ 00184 00185 /************************************************************************ 00186 BTREE METADATA PAGE LAYOUT 00187 ************************************************************************/ 00188 00189 /* 00190 * Btree metadata page layout: 00191 */ 00192 typedef struct _btmeta2X { 00193 DB_LSN lsn; /* 00-07: LSN. */ 00194 db_pgno_t pgno; /* 08-11: Current page number. */ 00195 u_int32_t magic; /* 12-15: Magic number. */ 00196 u_int32_t version; /* 16-19: Version. */ 00197 u_int32_t pagesize; /* 20-23: Pagesize. */ 00198 u_int32_t maxkey; /* 24-27: Btree: Maxkey. */ 00199 u_int32_t minkey; /* 28-31: Btree: Minkey. */ 00200 u_int32_t free; /* 32-35: Free list page number. */ 00201 u_int32_t flags; /* 36-39: Flags. */ 00202 u_int32_t re_len; /* 40-43: Recno: fixed-length record length. */ 00203 u_int32_t re_pad; /* 44-47: Recno: fixed-length record pad. */ 00204 /* 48-67: Unique file ID. */ 00205 u_int8_t uid[DB_FILE_ID_LEN]; 00206 } BTMETA2X; 00207 00208 /************************************************************************ 00209 HASH METADATA PAGE LAYOUT 00210 ************************************************************************/ 00211 00212 /* 00213 * Hash metadata page layout: 00214 */ 00215 /* Hash Table Information */ 00216 typedef struct hashhdr { /* Disk resident portion */ 00217 DB_LSN lsn; /* 00-07: LSN of the header page */ 00218 db_pgno_t pgno; /* 08-11: Page number (btree compatibility). */ 00219 u_int32_t magic; /* 12-15: Magic NO for hash tables */ 00220 u_int32_t version; /* 16-19: Version ID */ 00221 u_int32_t pagesize; /* 20-23: Bucket/Page Size */ 00222 u_int32_t ovfl_point; /* 24-27: Overflow page allocation location */ 00223 u_int32_t last_freed; /* 28-31: Last freed overflow page pgno */ 00224 u_int32_t max_bucket; /* 32-35: ID of Maximum bucket in use */ 00225 u_int32_t high_mask; /* 36-39: Modulo mask into table */ 00226 u_int32_t low_mask; /* 40-43: Modulo mask into table lower half */ 00227 u_int32_t ffactor; /* 44-47: Fill factor */ 00228 u_int32_t nelem; /* 48-51: Number of keys in hash table */ 00229 u_int32_t h_charkey; /* 52-55: Value of hash(CHARKEY) */ 00230 u_int32_t flags; /* 56-59: Allow duplicates. */ 00231 #define NCACHED2X 32 /* number of spare points */ 00232 /* 60-187: Spare pages for overflow */ 00233 u_int32_t spares[NCACHED2X]; 00234 /* 188-207: Unique file ID. */ 00235 u_int8_t uid[DB_FILE_ID_LEN]; 00236 00237 /* 00238 * Minimum page size is 256. 00239 */ 00240 } HASHHDR; 00241 00242 #endif /* !_DB_UPGRADE_H_ */
1.4.2