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243 lines
8.1 KiB
C
243 lines
8.1 KiB
C
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/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1996-2004
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* Sleepycat Software. All rights reserved.
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*
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* $Id: db_upgrade.h,v 1.12 2004/01/28 03:36:02 bostic Exp $
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*/
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#ifndef _DB_UPGRADE_H_
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#define _DB_UPGRADE_H_
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/*
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* This file defines the metadata pages from the previous release.
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* These structures are only used to upgrade old versions of databases.
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*/
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/* Structures from the 3.1 release */
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typedef struct _dbmeta31 {
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DB_LSN lsn; /* 00-07: LSN. */
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db_pgno_t pgno; /* 08-11: Current page number. */
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u_int32_t magic; /* 12-15: Magic number. */
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u_int32_t version; /* 16-19: Version. */
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u_int32_t pagesize; /* 20-23: Pagesize. */
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u_int8_t unused1[1]; /* 24: Unused. */
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u_int8_t type; /* 25: Page type. */
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u_int8_t unused2[2]; /* 26-27: Unused. */
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u_int32_t free; /* 28-31: Free list page number. */
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DB_LSN unused3; /* 36-39: Unused. */
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u_int32_t key_count; /* 40-43: Cached key count. */
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u_int32_t record_count; /* 44-47: Cached record count. */
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u_int32_t flags; /* 48-51: Flags: unique to each AM. */
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/* 52-71: Unique file ID. */
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u_int8_t uid[DB_FILE_ID_LEN];
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} DBMETA31;
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typedef struct _btmeta31 {
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DBMETA31 dbmeta; /* 00-71: Generic meta-data header. */
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u_int32_t maxkey; /* 72-75: Btree: Maxkey. */
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u_int32_t minkey; /* 76-79: Btree: Minkey. */
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u_int32_t re_len; /* 80-83: Recno: fixed-length record length. */
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u_int32_t re_pad; /* 84-87: Recno: fixed-length record pad. */
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u_int32_t root; /* 88-92: Root page. */
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/*
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* Minimum page size is 128.
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*/
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} BTMETA31;
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/************************************************************************
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HASH METADATA PAGE LAYOUT
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************************************************************************/
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typedef struct _hashmeta31 {
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DBMETA31 dbmeta; /* 00-71: Generic meta-data page header. */
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u_int32_t max_bucket; /* 72-75: ID of Maximum bucket in use */
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u_int32_t high_mask; /* 76-79: Modulo mask into table */
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u_int32_t low_mask; /* 80-83: Modulo mask into table lower half */
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u_int32_t ffactor; /* 84-87: Fill factor */
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u_int32_t nelem; /* 88-91: Number of keys in hash table */
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u_int32_t h_charkey; /* 92-95: Value of hash(CHARKEY) */
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#define NCACHED 32 /* number of spare points */
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/* 96-223: Spare pages for overflow */
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u_int32_t spares[NCACHED];
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/*
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* Minimum page size is 256.
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*/
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} HMETA31;
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/*
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* QAM Meta data page structure
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*
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*/
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typedef struct _qmeta31 {
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DBMETA31 dbmeta; /* 00-71: Generic meta-data header. */
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u_int32_t start; /* 72-75: Start offset. */
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u_int32_t first_recno; /* 76-79: First not deleted record. */
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u_int32_t cur_recno; /* 80-83: Last recno allocated. */
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u_int32_t re_len; /* 84-87: Fixed-length record length. */
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u_int32_t re_pad; /* 88-91: Fixed-length record pad. */
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u_int32_t rec_page; /* 92-95: Records Per Page. */
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/*
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* Minimum page size is 128.
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*/
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} QMETA31;
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/* Structures from the 3.2 release */
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typedef struct _qmeta32 {
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DBMETA31 dbmeta; /* 00-71: Generic meta-data header. */
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u_int32_t first_recno; /* 72-75: First not deleted record. */
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u_int32_t cur_recno; /* 76-79: Last recno allocated. */
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u_int32_t re_len; /* 80-83: Fixed-length record length. */
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u_int32_t re_pad; /* 84-87: Fixed-length record pad. */
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u_int32_t rec_page; /* 88-91: Records Per Page. */
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u_int32_t page_ext; /* 92-95: Pages per extent */
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/*
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* Minimum page size is 128.
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*/
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} QMETA32;
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/* Structures from the 3.0 release */
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typedef struct _dbmeta30 {
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DB_LSN lsn; /* 00-07: LSN. */
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db_pgno_t pgno; /* 08-11: Current page number. */
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u_int32_t magic; /* 12-15: Magic number. */
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u_int32_t version; /* 16-19: Version. */
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u_int32_t pagesize; /* 20-23: Pagesize. */
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u_int8_t unused1[1]; /* 24: Unused. */
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u_int8_t type; /* 25: Page type. */
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u_int8_t unused2[2]; /* 26-27: Unused. */
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u_int32_t free; /* 28-31: Free list page number. */
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u_int32_t flags; /* 32-35: Flags: unique to each AM. */
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/* 36-55: Unique file ID. */
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u_int8_t uid[DB_FILE_ID_LEN];
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} DBMETA30;
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/************************************************************************
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BTREE METADATA PAGE LAYOUT
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************************************************************************/
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typedef struct _btmeta30 {
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DBMETA30 dbmeta; /* 00-55: Generic meta-data header. */
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u_int32_t maxkey; /* 56-59: Btree: Maxkey. */
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u_int32_t minkey; /* 60-63: Btree: Minkey. */
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u_int32_t re_len; /* 64-67: Recno: fixed-length record length. */
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u_int32_t re_pad; /* 68-71: Recno: fixed-length record pad. */
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u_int32_t root; /* 72-75: Root page. */
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/*
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* Minimum page size is 128.
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*/
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} BTMETA30;
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/************************************************************************
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HASH METADATA PAGE LAYOUT
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************************************************************************/
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typedef struct _hashmeta30 {
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DBMETA30 dbmeta; /* 00-55: Generic meta-data page header. */
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u_int32_t max_bucket; /* 56-59: ID of Maximum bucket in use */
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u_int32_t high_mask; /* 60-63: Modulo mask into table */
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u_int32_t low_mask; /* 64-67: Modulo mask into table lower half */
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u_int32_t ffactor; /* 68-71: Fill factor */
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u_int32_t nelem; /* 72-75: Number of keys in hash table */
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u_int32_t h_charkey; /* 76-79: Value of hash(CHARKEY) */
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#define NCACHED30 32 /* number of spare points */
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/* 80-207: Spare pages for overflow */
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u_int32_t spares[NCACHED30];
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/*
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* Minimum page size is 256.
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*/
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} HMETA30;
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/************************************************************************
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QUEUE METADATA PAGE LAYOUT
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************************************************************************/
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/*
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* QAM Meta data page structure
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*
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*/
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typedef struct _qmeta30 {
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DBMETA30 dbmeta; /* 00-55: Generic meta-data header. */
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u_int32_t start; /* 56-59: Start offset. */
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u_int32_t first_recno; /* 60-63: First not deleted record. */
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u_int32_t cur_recno; /* 64-67: Last recno allocated. */
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u_int32_t re_len; /* 68-71: Fixed-length record length. */
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u_int32_t re_pad; /* 72-75: Fixed-length record pad. */
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u_int32_t rec_page; /* 76-79: Records Per Page. */
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/*
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* Minimum page size is 128.
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*/
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} QMETA30;
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/* Structures from Release 2.x */
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/************************************************************************
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BTREE METADATA PAGE LAYOUT
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************************************************************************/
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/*
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* Btree metadata page layout:
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*/
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typedef struct _btmeta2X {
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DB_LSN lsn; /* 00-07: LSN. */
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db_pgno_t pgno; /* 08-11: Current page number. */
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u_int32_t magic; /* 12-15: Magic number. */
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u_int32_t version; /* 16-19: Version. */
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u_int32_t pagesize; /* 20-23: Pagesize. */
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u_int32_t maxkey; /* 24-27: Btree: Maxkey. */
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u_int32_t minkey; /* 28-31: Btree: Minkey. */
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u_int32_t free; /* 32-35: Free list page number. */
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u_int32_t flags; /* 36-39: Flags. */
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u_int32_t re_len; /* 40-43: Recno: fixed-length record length. */
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u_int32_t re_pad; /* 44-47: Recno: fixed-length record pad. */
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/* 48-67: Unique file ID. */
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u_int8_t uid[DB_FILE_ID_LEN];
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} BTMETA2X;
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/************************************************************************
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HASH METADATA PAGE LAYOUT
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************************************************************************/
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/*
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* Hash metadata page layout:
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*/
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/* Hash Table Information */
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typedef struct hashhdr { /* Disk resident portion */
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DB_LSN lsn; /* 00-07: LSN of the header page */
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db_pgno_t pgno; /* 08-11: Page number (btree compatibility). */
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u_int32_t magic; /* 12-15: Magic NO for hash tables */
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u_int32_t version; /* 16-19: Version ID */
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u_int32_t pagesize; /* 20-23: Bucket/Page Size */
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u_int32_t ovfl_point; /* 24-27: Overflow page allocation location */
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u_int32_t last_freed; /* 28-31: Last freed overflow page pgno */
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u_int32_t max_bucket; /* 32-35: ID of Maximum bucket in use */
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u_int32_t high_mask; /* 36-39: Modulo mask into table */
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u_int32_t low_mask; /* 40-43: Modulo mask into table lower half */
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u_int32_t ffactor; /* 44-47: Fill factor */
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u_int32_t nelem; /* 48-51: Number of keys in hash table */
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u_int32_t h_charkey; /* 52-55: Value of hash(CHARKEY) */
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u_int32_t flags; /* 56-59: Allow duplicates. */
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#define NCACHED2X 32 /* number of spare points */
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/* 60-187: Spare pages for overflow */
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u_int32_t spares[NCACHED2X];
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/* 188-207: Unique file ID. */
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u_int8_t uid[DB_FILE_ID_LEN];
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/*
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* Minimum page size is 256.
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*/
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} HASHHDR;
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#endif /* !_DB_UPGRADE_H_ */
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