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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1999, 2000
* Sleepycat Software. All rights reserved.
*/
#include "db_config.h"
#ifndef lint
static const char revid[] = "$Id: qam_verify.c,v 1.17 2000/12/12 17:39:35 bostic Exp $";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#endif
#include "db_int.h"
#include "db_page.h"
#include "db_verify.h"
#include "qam.h"
#include "db_ext.h"
/*
* __qam_vrfy_meta --
* Verify the queue-specific part of a metadata page.
*
* PUBLIC: int __qam_vrfy_meta __P((DB *, VRFY_DBINFO *, QMETA *,
* PUBLIC: db_pgno_t, u_int32_t));
*/
int
__qam_vrfy_meta(dbp, vdp, meta, pgno, flags)
DB *dbp;
VRFY_DBINFO *vdp;
QMETA *meta;
db_pgno_t pgno;
u_int32_t flags;
{
VRFY_PAGEINFO *pip;
int isbad, ret, t_ret;
if ((ret = __db_vrfy_getpageinfo(vdp, pgno, &pip)) != 0)
return (ret);
isbad = 0;
/*
* Queue can't be used in subdatabases, so if this isn't set
* something very odd is going on.
*/
if (!F_ISSET(pip, VRFY_INCOMPLETE))
EPRINT((dbp->dbenv, "Queue databases must be one-per-file."));
/*
* cur_recno/rec_page
* Cur_recno may be one beyond the end of the page and
* we start numbering from 1.
*/
if (vdp->last_pgno > 0 && meta->cur_recno > 0 &&
meta->cur_recno - 1 > meta->rec_page * vdp->last_pgno) {
EPRINT((dbp->dbenv,
"Current recno %lu references record past last page number %lu",
meta->cur_recno, vdp->last_pgno));
isbad = 1;
}
/*
* re_len: If this is bad, we can't safely verify queue data pages, so
* return DB_VERIFY_FATAL
*/
if (ALIGN(meta->re_len + sizeof(QAMDATA) - 1, sizeof(u_int32_t)) *
meta->rec_page + sizeof(QPAGE) > dbp->pgsize) {
EPRINT((dbp->dbenv,
"Queue record length %lu impossibly high for page size and records per page",
meta->re_len));
ret = DB_VERIFY_FATAL;
goto err;
} else {
vdp->re_len = meta->re_len;
vdp->rec_page = meta->rec_page;
}
err: if ((t_ret = __db_vrfy_putpageinfo(vdp, pip)) != 0 && ret == 0)
ret = t_ret;
return (ret == 0 && isbad == 1 ? DB_VERIFY_BAD : ret);
}
/*
* __qam_vrfy_data --
* Verify a queue data page.
*
* PUBLIC: int __qam_vrfy_data __P((DB *, VRFY_DBINFO *, QPAGE *,
* PUBLIC: db_pgno_t, u_int32_t));
*/
int
__qam_vrfy_data(dbp, vdp, h, pgno, flags)
DB *dbp;
VRFY_DBINFO *vdp;
QPAGE *h;
db_pgno_t pgno;
u_int32_t flags;
{
DB fakedb;
struct __queue fakeq;
QAMDATA *qp;
db_recno_t i;
u_int8_t qflags;
/*
* Not much to do here, except make sure that flags are reasonable.
*
* QAM_GET_RECORD assumes a properly initialized q_internal
* structure, however, and we don't have one, so we play
* some gross games to fake it out.
*/
fakedb.q_internal = &fakeq;
fakeq.re_len = vdp->re_len;
for (i = 0; i < vdp->rec_page; i++) {
qp = QAM_GET_RECORD(&fakedb, h, i);
if ((u_int8_t *)qp >= (u_int8_t *)h + dbp->pgsize) {
EPRINT((dbp->dbenv,
"Queue record %lu extends past end of page %lu",
i, pgno));
return (DB_VERIFY_BAD);
}
qflags = qp->flags;
qflags &= !(QAM_VALID | QAM_SET);
if (qflags != 0) {
EPRINT((dbp->dbenv,
"Queue record %lu on page %lu has bad flags",
i, pgno));
return (DB_VERIFY_BAD);
}
}
return (0);
}
/*
* __qam_vrfy_structure --
* Verify a queue database structure, such as it is.
*
* PUBLIC: int __qam_vrfy_structure __P((DB *, VRFY_DBINFO *, u_int32_t));
*/
int
__qam_vrfy_structure(dbp, vdp, flags)
DB *dbp;
VRFY_DBINFO *vdp;
u_int32_t flags;
{
VRFY_PAGEINFO *pip;
db_pgno_t i;
int ret, isbad;
isbad = 0;
if ((ret = __db_vrfy_getpageinfo(vdp, PGNO_BASE_MD, &pip)) != 0)
return (ret);
if (pip->type != P_QAMMETA) {
EPRINT((dbp->dbenv,
"Queue database has no meta page"));
isbad = 1;
goto err;
}
if ((ret = __db_vrfy_pgset_inc(vdp->pgset, 0)) != 0)
goto err;
for (i = 1; i <= vdp->last_pgno; i++) {
/* Send feedback to the application about our progress. */
if (!LF_ISSET(DB_SALVAGE))
__db_vrfy_struct_feedback(dbp, vdp);
if ((ret = __db_vrfy_putpageinfo(vdp, pip)) != 0 ||
(ret = __db_vrfy_getpageinfo(vdp, i, &pip)) != 0)
return (ret);
if (!F_ISSET(pip, VRFY_IS_ALLZEROES) &&
pip->type != P_QAMDATA) {
EPRINT((dbp->dbenv,
"Queue database page %lu of incorrect type %lu",
i, pip->type));
isbad = 1;
goto err;
} else if ((ret = __db_vrfy_pgset_inc(vdp->pgset, i)) != 0)
goto err;
}
err: if ((ret = __db_vrfy_putpageinfo(vdp, pip)) != 0)
return (ret);
return (isbad == 1 ? DB_VERIFY_BAD : 0);
}
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