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97 lines
2.2 KiB
C
97 lines
2.2 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1996-2002
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* Sleepycat Software. All rights reserved.
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*/
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#include "db_config.h"
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#ifndef lint
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static const char revid[] = "$Id: crdel_rec.c,v 11.64 2002/08/14 20:27:34 bostic Exp $";
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#endif /* not lint */
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <string.h>
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#endif
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#include "db_int.h"
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#include "dbinc/db_page.h"
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#include "dbinc/hash.h"
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#include "dbinc/log.h"
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/*
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* __crdel_metasub_recover --
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* Recovery function for metasub.
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*
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* PUBLIC: int __crdel_metasub_recover
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* PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
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*/
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int
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__crdel_metasub_recover(dbenv, dbtp, lsnp, op, info)
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DB_ENV *dbenv;
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DBT *dbtp;
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DB_LSN *lsnp;
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db_recops op;
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void *info;
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{
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__crdel_metasub_args *argp;
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DB *file_dbp;
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DBC *dbc;
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DB_MPOOLFILE *mpf;
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PAGE *pagep;
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int cmp_p, modified, ret;
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pagep = NULL;
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COMPQUIET(info, NULL);
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REC_PRINT(__crdel_metasub_print);
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REC_INTRO(__crdel_metasub_read, 0);
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if ((ret = mpf->get(mpf, &argp->pgno, 0, &pagep)) != 0) {
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if (DB_REDO(op)) {
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if ((ret = mpf->get(mpf,
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&argp->pgno, DB_MPOOL_CREATE, &pagep)) != 0)
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goto out;
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} else {
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*lsnp = argp->prev_lsn;
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ret = 0;
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goto out;
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}
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}
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modified = 0;
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cmp_p = log_compare(&LSN(pagep), &argp->lsn);
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CHECK_LSN(op, cmp_p, &LSN(pagep), &argp->lsn);
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if (cmp_p == 0 && DB_REDO(op)) {
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memcpy(pagep, argp->page.data, argp->page.size);
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LSN(pagep) = *lsnp;
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modified = 1;
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} else if (DB_UNDO(op)) {
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/*
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* We want to undo this page creation. The page creation
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* happened in two parts. First, we called __bam_new which
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* was logged separately. Then we wrote the meta-data onto
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* the page. So long as we restore the LSN, then the recovery
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* for __bam_new will do everything else.
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* Don't bother checking the lsn on the page. If we
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* are rolling back the next thing is that this page
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* will get freed. Opening the subdb will have reinitialized
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* the page, but not the lsn.
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*/
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LSN(pagep) = argp->lsn;
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modified = 1;
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}
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if ((ret = mpf->put(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
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goto out;
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pagep = NULL;
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done: *lsnp = argp->prev_lsn;
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ret = 0;
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out: if (pagep != NULL)
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(void)mpf->put(mpf, pagep, 0);
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REC_CLOSE;
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}
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