diff options
Diffstat (limited to 'db/include/db_upgrade.h')
| -rw-r--r-- | db/include/db_upgrade.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/db/include/db_upgrade.h b/db/include/db_upgrade.h new file mode 100644 index 000000000..d8d996452 --- /dev/null +++ b/db/include/db_upgrade.h @@ -0,0 +1,174 @@ +/*- + * 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 |