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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1999-2002
* Sleepycat Software. All rights reserved.
*/
#include "db_config.h"
#ifndef lint
static const char revid[] = "$Id: qam_stat.c,v 1.1.1.1 2003/11/20 22:13:47 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/db_shash.h"
#include "dbinc/db_am.h"
#include "dbinc/lock.h"
#include "dbinc/log.h"
#include "dbinc/qam.h"
/*
* __qam_stat --
* Gather/print the qam statistics
*
* PUBLIC: int __qam_stat __P((DB *, void *, u_int32_t));
*/
int
__qam_stat(dbp, spp, flags)
DB *dbp;
void *spp;
u_int32_t flags;
{
DBC *dbc;
DB_LOCK lock;
DB_MPOOLFILE *mpf;
DB_QUEUE_STAT *sp;
PAGE *h;
QAMDATA *qp, *ep;
QMETA *meta;
QUEUE *t;
db_indx_t indx;
db_pgno_t first, last, pgno, pg_ext, stop;
u_int32_t re_len;
int ret, t_ret;
PANIC_CHECK(dbp->dbenv);
DB_ILLEGAL_BEFORE_OPEN(dbp, "DB->stat");
LOCK_INIT(lock);
mpf = dbp->mpf;
sp = NULL;
t = dbp->q_internal;
/* Check for invalid flags. */
if ((ret = __db_statchk(dbp, flags)) != 0)
return (ret);
if (spp == NULL)
return (0);
/* Acquire a cursor. */
if ((ret = dbp->cursor(dbp, NULL, &dbc, 0)) != 0)
return (ret);
DEBUG_LWRITE(dbc, NULL, "qam_stat", NULL, NULL, flags);
/* Allocate and clear the structure. */
if ((ret = __os_umalloc(dbp->dbenv, sizeof(*sp), &sp)) != 0)
goto err;
memset(sp, 0, sizeof(*sp));
re_len = ((QUEUE *)dbp->q_internal)->re_len;
/* Determine the last page of the database. */
if ((ret = __db_lget(dbc,
0, t->q_meta, DB_LOCK_READ, 0, &lock)) != 0)
goto err;
if ((ret = mpf->get(mpf, &t->q_meta, 0, (PAGE **)&meta)) != 0)
goto err;
if (flags == DB_FAST_STAT || flags == DB_CACHED_COUNTS) {
sp->qs_nkeys = meta->dbmeta.key_count;
sp->qs_ndata = meta->dbmeta.record_count;
goto meta_only;
}
first = QAM_RECNO_PAGE(dbp, meta->first_recno);
last = QAM_RECNO_PAGE(dbp, meta->cur_recno);
if ((ret = mpf->put(mpf, meta, 0)) != 0)
goto err;
(void)__LPUT(dbc, lock);
pgno = first;
if (first > last)
stop = QAM_RECNO_PAGE(dbp, UINT32_T_MAX);
else
stop = last;
/* Dump each page. */
pg_ext = ((QUEUE *)dbp->q_internal)->page_ext;
begin:
/* Walk through the pages and count. */
for (; pgno <= stop; ++pgno) {
if ((ret =
__db_lget(dbc, 0, pgno, DB_LOCK_READ, 0, &lock)) != 0)
goto err;
ret = __qam_fget(dbp, &pgno, 0, &h);
if (ret == ENOENT) {
pgno += pg_ext - 1;
continue;
}
if (ret == DB_PAGE_NOTFOUND) {
if (pg_ext == 0) {
if (pgno != stop && first != last)
goto err;
ret = 0;
break;
}
pgno += pg_ext - ((pgno - 1) % pg_ext) - 1;
continue;
}
if (ret != 0)
goto err;
++sp->qs_pages;
ep = (QAMDATA *)((u_int8_t *)h + dbp->pgsize - re_len);
for (indx = 0, qp = QAM_GET_RECORD(dbp, h, indx);
qp <= ep;
++indx, qp = QAM_GET_RECORD(dbp, h, indx)) {
if (F_ISSET(qp, QAM_VALID))
sp->qs_ndata++;
else
sp->qs_pgfree += re_len;
}
if ((ret = __qam_fput(dbp, pgno, h, 0)) != 0)
goto err;
(void)__LPUT(dbc, lock);
}
(void)__LPUT(dbc, lock);
if (first > last) {
pgno = 1;
stop = last;
first = last;
goto begin;
}
/* Get the meta-data page. */
if ((ret = __db_lget(dbc,
0, t->q_meta, F_ISSET(dbp, DB_AM_RDONLY) ?
DB_LOCK_READ : DB_LOCK_WRITE, 0, &lock)) != 0)
goto err;
if ((ret = mpf->get(mpf, &t->q_meta, 0, (PAGE **)&meta)) != 0)
goto err;
if (!F_ISSET(dbp, DB_AM_RDONLY))
meta->dbmeta.key_count =
meta->dbmeta.record_count = sp->qs_ndata;
sp->qs_nkeys = sp->qs_ndata;
meta_only:
/* Get the metadata fields. */
sp->qs_magic = meta->dbmeta.magic;
sp->qs_version = meta->dbmeta.version;
sp->qs_metaflags = meta->dbmeta.flags;
sp->qs_pagesize = meta->dbmeta.pagesize;
sp->qs_extentsize = meta->page_ext;
sp->qs_re_len = meta->re_len;
sp->qs_re_pad = meta->re_pad;
sp->qs_first_recno = meta->first_recno;
sp->qs_cur_recno = meta->cur_recno;
/* Discard the meta-data page. */
if ((ret = mpf->put(mpf,
meta, F_ISSET(dbp, DB_AM_RDONLY) ? 0 : DB_MPOOL_DIRTY)) != 0)
goto err;
(void)__LPUT(dbc, lock);
*(DB_QUEUE_STAT **)spp = sp;
ret = 0;
if (0) {
err: if (sp != NULL)
__os_ufree(dbp->dbenv, sp);
}
(void)__LPUT(dbc, lock);
if ((t_ret = dbc->c_close(dbc)) != 0 && ret == 0)
ret = t_ret;
return (ret);
}
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