175 lines
5.7 KiB
C
175 lines
5.7 KiB
C
/*-
|
|
* See the file LICENSE for redistribution information.
|
|
*
|
|
* Copyright (c) 1996, 1997, 1998, 1999, 2000
|
|
* Sleepycat Software. All rights reserved.
|
|
*
|
|
* $Id: db_upgrade.h,v 1.5 2000/11/16 23:40:56 ubell Exp $
|
|
*/
|
|
|
|
#ifndef _DB_UPGRADE_H_
|
|
#define _DB_UPGRADE_H_
|
|
|
|
/*
|
|
* 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 */
|
|
/*
|
|
* QAM Meta data page structure
|
|
*
|
|
*/
|
|
typedef struct _qmeta31 {
|
|
DBMETA 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 3.0 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;
|
|
|
|
#endif
|