English
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1996-2002
- * Sleepycat Software. All rights reserved.
- *
- * $Id: db_upgrade.h,v 1.10 2002/01/11 15:52:26 bostic 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 */
- 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;
- #endif /* !_DB_UPGRADE_H_ */
