/*- * See the file LICENSE for redistribution information. * * Copyright (c) 1996,2008 Oracle. All rights reserved. * * $Id: db_upgrade.h,v 12.7 2008/01/08 20:58:18 bostic Exp $ */ #ifndef _DB_UPGRADE_H_ #define _DB_UPGRADE_H_ #if defined(__cplusplus) extern "C" { #endif /* * This file defines the metadata pages from the previous release. * These structures are only used to upgrade old versions of databases. */ /* Structures from the 3.1 release */ typedef struct _dbmeta31 { DB_LSN lsn; /* 00-07: LSN. */ db_pgno_t pgno; /* 08-11: Current page number. */ u_int32_t magic; /* 12-15: Magic number. */ u_int32_t version; /* 16-19: Version. */ u_int32_t pagesize; /* 20-23: Pagesize. */ u_int8_t unused1[1]; /* 24: Unused. */ u_int8_t type; /* 25: Page type. */ u_int8_t unused2[2]; /* 26-27: Unused. */ u_int32_t free; /* 28-31: Free list page number. */ DB_LSN unused3; /* 36-39: Unused. */ u_int32_t key_count; /* 40-43: Cached key count. */ u_int32_t record_count; /* 44-47: Cached record count. */ u_int32_t flags; /* 48-51: Flags: unique to each AM. */ /* 52-71: Unique file ID. */ u_int8_t uid[DB_FILE_ID_LEN]; } DBMETA31; typedef struct _btmeta31 { DBMETA31 dbmeta; /* 00-71: Generic meta-data header. */ u_int32_t maxkey; /* 72-75: Btree: Maxkey. */ u_int32_t minkey; /* 76-79: Btree: Minkey. */ u_int32_t re_len; /* 80-83: Recno: fixed-length record length. */ u_int32_t re_pad; /* 84-87: Recno: fixed-length record pad. */ u_int32_t root; /* 88-92: Root page. */ /* * Minimum page size is 128. */ } BTMETA31; /************************************************************************ HASH METADATA PAGE LAYOUT ************************************************************************/ typedef struct _hashmeta31 { DBMETA31 dbmeta; /* 00-71: Generic meta-data page header. */ u_int32_t max_bucket; /* 72-75: ID of Maximum bucket in use */ u_int32_t high_mask; /* 76-79: Modulo mask into table */ u_int32_t low_mask; /* 80-83: Modulo mask into table lower half */ u_int32_t ffactor; /* 84-87: Fill factor */ u_int32_t nelem; /* 88-91: Number of keys in hash table */ u_int32_t h_charkey; /* 92-95: Value of hash(CHARKEY) */ #define NCACHED 32 /* number of spare points */ /* 96-223: Spare pages for overflow */ u_int32_t spares[NCACHED]; /* * Minimum page size is 256. */ } HMETA31; /* * QAM Meta data page structure * */ typedef struct _qmeta31 { DBMETA31 dbmeta; /* 00-71: Generic meta-data header. */ u_int32_t start; /* 72-75: Start offset. */ u_int32_t first_recno; /* 76-79: First not deleted record. */ u_int32_t cur_recno; /* 80-83: Last recno allocated. */ u_int32_t re_len; /* 84-87: Fixed-length record length. */ u_int32_t re_pad; /* 88-91: Fixed-length record pad. */ u_int32_t rec_page; /* 92-95: Records Per Page. */ /* * Minimum page size is 128. */ } QMETA31; /* Structures from the 3.2 release */ typedef struct _qmeta32 { DBMETA31 dbmeta; /* 00-71: Generic meta-data header. */ u_int32_t first_recno; /* 72-75: First not deleted record. */ u_int32_t cur_recno; /* 76-79: Last recno allocated. */ u_int32_t re_len; /* 80-83: Fixed-length record length. */ u_int32_t re_pad; /* 84-87: Fixed-length record pad. */ u_int32_t rec_page; /* 88-91: Records Per Page. */ u_int32_t page_ext; /* 92-95: Pages per extent */ /* * Minimum page size is 128. */ } QMETA32; /* Structures from the 3.0 release */ typedef struct _dbmeta30 { DB_LSN lsn; /* 00-07: LSN. */ db_pgno_t pgno; /* 08-11: Current page number. */ u_int32_t magic; /* 12-15: Magic number. */ u_int32_t version; /* 16-19: Version. */ u_int32_t pagesize; /* 20-23: Pagesize. */ u_int8_t unused1[1]; /* 24: Unused. */ u_int8_t type; /* 25: Page type. */ u_int8_t unused2[2]; /* 26-27: Unused. */ u_int32_t free; /* 28-31: Free list page number. */ u_int32_t flags; /* 32-35: Flags: unique to each AM. */ /* 36-55: Unique file ID. */ u_int8_t uid[DB_FILE_ID_LEN]; } DBMETA30; /************************************************************************ BTREE METADATA PAGE LAYOUT ************************************************************************/ typedef struct _btmeta30 { DBMETA30 dbmeta; /* 00-55: Generic meta-data header. */ u_int32_t maxkey; /* 56-59: Btree: Maxkey. */ u_int32_t minkey; /* 60-63: Btree: Minkey. */ u_int32_t re_len; /* 64-67: Recno: fixed-length record length. */ u_int32_t re_pad; /* 68-71: Recno: fixed-length record pad. */ u_int32_t root; /* 72-75: Root page. */ /* * Minimum page size is 128. */ } BTMETA30; /************************************************************************ HASH METADATA PAGE LAYOUT ************************************************************************/ typedef struct _hashmeta30 { DBMETA30 dbmeta; /* 00-55: Generic meta-data page header. */ u_int32_t max_bucket; /* 56-59: ID of Maximum bucket in use */ u_int32_t high_mask; /* 60-63: Modulo mask into table */ u_int32_t low_mask; /* 64-67: Modulo mask into table lower half */ u_int32_t ffactor; /* 68-71: Fill factor */ u_int32_t nelem; /* 72-75: Number of keys in hash table */ u_int32_t h_charkey; /* 76-79: Value of hash(CHARKEY) */ #define NCACHED30 32 /* number of spare points */ /* 80-207: Spare pages for overflow */ u_int32_t spares[NCACHED30]; /* * Minimum page size is 256. */ } HMETA30; /************************************************************************ QUEUE METADATA PAGE LAYOUT ************************************************************************/ /* * QAM Meta data page structure * */ typedef struct _qmeta30 { DBMETA30 dbmeta; /* 00-55: Generic meta-data header. */ u_int32_t start; /* 56-59: Start offset. */ u_int32_t first_recno; /* 60-63: First not deleted record. */ u_int32_t cur_recno; /* 64-67: Last recno allocated. */ u_int32_t re_len; /* 68-71: Fixed-length record length. */ u_int32_t re_pad; /* 72-75: Fixed-length record pad. */ u_int32_t rec_page; /* 76-79: Records Per Page. */ /* * Minimum page size is 128. */ } QMETA30; /* Structures from Release 2.x */ /************************************************************************ BTREE METADATA PAGE LAYOUT ************************************************************************/ /* * Btree metadata page layout: */ typedef struct _btmeta2X { DB_LSN lsn; /* 00-07: LSN. */ db_pgno_t pgno; /* 08-11: Current page number. */ u_int32_t magic; /* 12-15: Magic number. */ u_int32_t version; /* 16-19: Version. */ u_int32_t pagesize; /* 20-23: Pagesize. */ u_int32_t maxkey; /* 24-27: Btree: Maxkey. */ u_int32_t minkey; /* 28-31: Btree: Minkey. */ u_int32_t free; /* 32-35: Free list page number. */ u_int32_t flags; /* 36-39: Flags. */ u_int32_t re_len; /* 40-43: Recno: fixed-length record length. */ u_int32_t re_pad; /* 44-47: Recno: fixed-length record pad. */ /* 48-67: Unique file ID. */ u_int8_t uid[DB_FILE_ID_LEN]; } BTMETA2X; /************************************************************************ HASH METADATA PAGE LAYOUT ************************************************************************/ /* * Hash metadata page layout: */ /* Hash Table Information */ typedef struct hashhdr { /* Disk resident portion */ DB_LSN lsn; /* 00-07: LSN of the header page */ db_pgno_t pgno; /* 08-11: Page number (btree compatibility). */ u_int32_t magic; /* 12-15: Magic NO for hash tables */ u_int32_t version; /* 16-19: Version ID */ u_int32_t pagesize; /* 20-23: Bucket/Page Size */ u_int32_t ovfl_point; /* 24-27: Overflow page allocation location */ u_int32_t last_freed; /* 28-31: Last freed overflow page pgno */ u_int32_t max_bucket; /* 32-35: ID of Maximum bucket in use */ u_int32_t high_mask; /* 36-39: Modulo mask into table */ u_int32_t low_mask; /* 40-43: Modulo mask into table lower half */ u_int32_t ffactor; /* 44-47: Fill factor */ u_int32_t nelem; /* 48-51: Number of keys in hash table */ u_int32_t h_charkey; /* 52-55: Value of hash(CHARKEY) */ u_int32_t flags; /* 56-59: Allow duplicates. */ #define NCACHED2X 32 /* number of spare points */ /* 60-187: Spare pages for overflow */ u_int32_t spares[NCACHED2X]; /* 188-207: Unique file ID. */ u_int8_t uid[DB_FILE_ID_LEN]; /* * Minimum page size is 256. */ } HASHHDR; #if defined(__cplusplus) } #endif #endif /* !_DB_UPGRADE_H_ */