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/*-
* 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: crdel_rec.c,v 1.1.1.1 2003/11/20 22:13:11 toshok Exp $";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <string.h>
#endif
#include "db_int.h"
#include "dbinc/db_page.h"
#include "dbinc/hash.h"
#include "dbinc/log.h"
/*
* __crdel_metasub_recover --
* Recovery function for metasub.
*
* PUBLIC: int __crdel_metasub_recover
* PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
*/
int
__crdel_metasub_recover(dbenv, dbtp, lsnp, op, info)
DB_ENV *dbenv;
DBT *dbtp;
DB_LSN *lsnp;
db_recops op;
void *info;
{
__crdel_metasub_args *argp;
DB *file_dbp;
DBC *dbc;
DB_MPOOLFILE *mpf;
PAGE *pagep;
int cmp_p, modified, ret;
pagep = NULL;
COMPQUIET(info, NULL);
REC_PRINT(__crdel_metasub_print);
REC_INTRO(__crdel_metasub_read, 0);
if ((ret = mpf->get(mpf, &argp->pgno, 0, &pagep)) != 0) {
if (DB_REDO(op)) {
if ((ret = mpf->get(mpf,
&argp->pgno, DB_MPOOL_CREATE, &pagep)) != 0)
goto out;
} else {
*lsnp = argp->prev_lsn;
ret = 0;
goto out;
}
}
modified = 0;
cmp_p = log_compare(&LSN(pagep), &argp->lsn);
CHECK_LSN(op, cmp_p, &LSN(pagep), &argp->lsn);
if (cmp_p == 0 && DB_REDO(op)) {
memcpy(pagep, argp->page.data, argp->page.size);
LSN(pagep) = *lsnp;
modified = 1;
} else if (DB_UNDO(op)) {
/*
* We want to undo this page creation. The page creation
* happened in two parts. First, we called __bam_new which
* was logged separately. Then we wrote the meta-data onto
* the page. So long as we restore the LSN, then the recovery
* for __bam_new will do everything else.
* Don't bother checking the lsn on the page. If we
* are rolling back the next thing is that this page
* will get freed. Opening the subdb will have reinitialized
* the page, but not the lsn.
*/
LSN(pagep) = argp->lsn;
modified = 1;
}
if ((ret = mpf->put(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
goto out;
pagep = NULL;
done: *lsnp = argp->prev_lsn;
ret = 0;
out: if (pagep != NULL)
(void)mpf->put(mpf, pagep, 0);
REC_CLOSE;
}
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