bt_upgrade.c
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上传日期:2022-05-23
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文件大小:4k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1996-2002
- * Sleepycat Software. All rights reserved.
- */
- #include "db_config.h"
- #ifndef lint
- static const char revid[] = "$Id: bt_upgrade.c,v 11.25 2002/08/06 06:11:13 bostic Exp $";
- #endif /* not lint */
- #ifndef NO_SYSTEM_INCLUDES
- #include <sys/types.h>
- #include <limits.h>
- #include <string.h>
- #endif
- #include "db_int.h"
- #include "dbinc/db_page.h"
- #include "dbinc/db_am.h"
- #include "dbinc/db_upgrade.h"
- /*
- * __bam_30_btreemeta --
- * Upgrade the metadata pages from version 6 to version 7.
- *
- * PUBLIC: int __bam_30_btreemeta __P((DB *, char *, u_int8_t *));
- */
- int
- __bam_30_btreemeta(dbp, real_name, buf)
- DB *dbp;
- char *real_name;
- u_int8_t *buf;
- {
- BTMETA30 *newmeta;
- BTMETA2X *oldmeta;
- DB_ENV *dbenv;
- int ret;
- dbenv = dbp->dbenv;
- newmeta = (BTMETA30 *)buf;
- oldmeta = (BTMETA2X *)buf;
- /*
- * Move things from the end up, so we do not overwrite things.
- * We are going to create a new uid, so we can move the stuff
- * at the end of the structure first, overwriting the uid.
- */
- newmeta->re_pad = oldmeta->re_pad;
- newmeta->re_len = oldmeta->re_len;
- newmeta->minkey = oldmeta->minkey;
- newmeta->maxkey = oldmeta->maxkey;
- newmeta->dbmeta.free = oldmeta->free;
- newmeta->dbmeta.flags = oldmeta->flags;
- newmeta->dbmeta.type = P_BTREEMETA;
- newmeta->dbmeta.version = 7;
- /* Replace the unique ID. */
- if ((ret = __os_fileid(dbenv, real_name, 1, buf + 36)) != 0)
- return (ret);
- newmeta->root = 1;
- return (0);
- }
- /*
- * __bam_31_btreemeta --
- * Upgrade the database from version 7 to version 8.
- *
- * PUBLIC: int __bam_31_btreemeta
- * PUBLIC: __P((DB *, char *, u_int32_t, DB_FH *, PAGE *, int *));
- */
- int
- __bam_31_btreemeta(dbp, real_name, flags, fhp, h, dirtyp)
- DB *dbp;
- char *real_name;
- u_int32_t flags;
- DB_FH *fhp;
- PAGE *h;
- int *dirtyp;
- {
- BTMETA31 *newmeta;
- BTMETA30 *oldmeta;
- COMPQUIET(dbp, NULL);
- COMPQUIET(real_name, NULL);
- COMPQUIET(fhp, NULL);
- newmeta = (BTMETA31 *)h;
- oldmeta = (BTMETA30 *)h;
- /*
- * Copy the effected fields down the page.
- * The fields may overlap each other so we
- * start at the bottom and use memmove.
- */
- newmeta->root = oldmeta->root;
- newmeta->re_pad = oldmeta->re_pad;
- newmeta->re_len = oldmeta->re_len;
- newmeta->minkey = oldmeta->minkey;
- newmeta->maxkey = oldmeta->maxkey;
- memmove(newmeta->dbmeta.uid,
- oldmeta->dbmeta.uid, sizeof(oldmeta->dbmeta.uid));
- newmeta->dbmeta.flags = oldmeta->dbmeta.flags;
- newmeta->dbmeta.record_count = 0;
- newmeta->dbmeta.key_count = 0;
- ZERO_LSN(newmeta->dbmeta.unused3);
- /* Set the version number. */
- newmeta->dbmeta.version = 8;
- /* Upgrade the flags. */
- if (LF_ISSET(DB_DUPSORT))
- F_SET(&newmeta->dbmeta, BTM_DUPSORT);
- *dirtyp = 1;
- return (0);
- }
- /*
- * __bam_31_lbtree --
- * Upgrade the database btree leaf pages.
- *
- * PUBLIC: int __bam_31_lbtree
- * PUBLIC: __P((DB *, char *, u_int32_t, DB_FH *, PAGE *, int *));
- */
- int
- __bam_31_lbtree(dbp, real_name, flags, fhp, h, dirtyp)
- DB *dbp;
- char *real_name;
- u_int32_t flags;
- DB_FH *fhp;
- PAGE *h;
- int *dirtyp;
- {
- BKEYDATA *bk;
- db_pgno_t pgno;
- db_indx_t indx;
- int ret;
- ret = 0;
- for (indx = O_INDX; indx < NUM_ENT(h); indx += P_INDX) {
- bk = GET_BKEYDATA(dbp, h, indx);
- if (B_TYPE(bk->type) == B_DUPLICATE) {
- pgno = GET_BOVERFLOW(dbp, h, indx)->pgno;
- if ((ret = __db_31_offdup(dbp, real_name, fhp,
- LF_ISSET(DB_DUPSORT) ? 1 : 0, &pgno)) != 0)
- break;
- if (pgno != GET_BOVERFLOW(dbp, h, indx)->pgno) {
- *dirtyp = 1;
- GET_BOVERFLOW(dbp, h, indx)->pgno = pgno;
- }
- }
- }
- return (ret);
- }