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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996, 1997
* Sleepycat Software. All rights reserved.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)bt_stat.c 10.14 (Sleepycat) 10/25/97";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#endif
#include "db_int.h"
#include "db_page.h"
#include "btree.h"
static void __bam_add_rstat __P((DB_BTREE_LSTAT *, DB_BTREE_STAT *));
/*
* __bam_stat --
* Gather/print the btree statistics
*
* PUBLIC: int __bam_stat __P((DB *, void *, void *(*)(size_t), int));
*/
int
__bam_stat(argdbp, spp, db_malloc, flags)
DB *argdbp;
void *spp;
void *(*db_malloc) __P((size_t));
int flags;
{
BTMETA *meta;
BTREE *t;
DB *dbp;
DB_BTREE_STAT *sp;
DB_LOCK lock;
PAGE *h;
db_pgno_t lastpgno, pgno;
int ret;
DEBUG_LWRITE(argdbp, NULL, "bam_stat", NULL, NULL, flags);
/* Check for invalid flags. */
if ((ret = __db_statchk(argdbp, flags)) != 0)
return (ret);
if (spp == NULL)
return (0);
GETHANDLE(argdbp, NULL, &dbp, ret);
t = dbp->internal;
/* Allocate and clear the structure. */
if ((sp = db_malloc == NULL ?
(DB_BTREE_STAT *)__db_malloc(sizeof(*sp)) :
(DB_BTREE_STAT *)db_malloc(sizeof(*sp))) == NULL) {
ret = ENOMEM;
goto err;
}
memset(sp, 0, sizeof(*sp));
/* If the app just wants the record count, make it fast. */
if (LF_ISSET(DB_RECORDCOUNT)) {
pgno = PGNO_ROOT;
if ((ret = __bam_lget(dbp, 0, pgno, DB_LOCK_READ, &lock)) != 0)
goto err;
if ((ret = __bam_pget(dbp, (PAGE **)&h, &pgno, 0)) != 0)
goto err;
sp->bt_nrecs = RE_NREC(h);
(void)memp_fput(dbp->mpf, h, 0);
(void)__BT_LPUT(dbp, lock);
goto done;
}
/* Get the meta-data page. */
pgno = PGNO_METADATA;
if ((ret = __bam_lget(dbp, 0, pgno, DB_LOCK_READ, &lock)) != 0)
goto err;
if ((ret = __bam_pget(dbp, (PAGE **)&meta, &pgno, 0)) != 0)
goto err;
/* Translate the metadata flags. */
if (F_ISSET(meta, BTM_DUP))
sp->bt_flags |= DB_DUP;
if (F_ISSET(meta, BTM_FIXEDLEN))
sp->bt_flags |= DB_FIXEDLEN;
if (F_ISSET(meta, BTM_RECNUM))
sp->bt_flags |= DB_RECNUM;
if (F_ISSET(meta, BTM_RENUMBER))
sp->bt_flags |= DB_RENUMBER;
/* Get the remaining metadata fields. */
sp->bt_minkey = meta->minkey;
sp->bt_maxkey = meta->maxkey;
sp->bt_re_len = meta->re_len;
sp->bt_re_pad = meta->re_pad;
sp->bt_magic = meta->magic;
sp->bt_version = meta->version;
/* Get the page size from the DB. */
sp->bt_pagesize = dbp->pgsize;
/* Initialize counters with the meta-data page information. */
__bam_add_rstat(&meta->stat, sp);
/*
* Add in the local information from this handle.
*
* !!!
* This is a bit odd, but it gets us closer to the truth.
*/
__bam_add_rstat(&t->lstat, sp);
/* Walk the free list, counting pages. */
for (sp->bt_free = 0, pgno = meta->free; pgno != PGNO_INVALID;) {
++sp->bt_free;
if ((ret = __bam_pget(dbp, &h, &pgno, 0)) != 0) {
(void)memp_fput(dbp->mpf, meta, 0);
(void)__BT_TLPUT(dbp, lock);
goto err;
}
pgno = h->next_pgno;
(void)memp_fput(dbp->mpf, h, 0);
}
/* Discard the meta-data page. */
(void)memp_fput(dbp->mpf, meta, 0);
(void)__BT_TLPUT(dbp, lock);
/* Determine the last page of the database. */
if ((ret = memp_fget(dbp->mpf, &lastpgno, DB_MPOOL_LAST, &h)) != 0)
goto err;
(void)memp_fput(dbp->mpf, h, 0);
/* Get the root page. */
pgno = PGNO_ROOT;
if ((ret = __bam_lget(dbp, 0, PGNO_ROOT, DB_LOCK_READ, &lock)) != 0)
goto err;
if ((ret = __bam_pget(dbp, &h, &pgno, 0)) != 0) {
(void)__BT_LPUT(dbp, lock);
goto err;
}
/* Get the levels from the root page. */
sp->bt_levels = h->level;
/* Walk the page list, counting things. */
for (;;) {
switch (TYPE(h)) {
case P_INVALID:
break;
case P_IBTREE:
case P_IRECNO:
++sp->bt_int_pg;
sp->bt_int_pgfree += HOFFSET(h) - LOFFSET(h);
break;
case P_LBTREE:
++sp->bt_leaf_pg;
sp->bt_leaf_pgfree += HOFFSET(h) - LOFFSET(h);
sp->bt_nrecs += NUM_ENT(h) / P_INDX;
break;
case P_LRECNO:
++sp->bt_leaf_pg;
sp->bt_leaf_pgfree += HOFFSET(h) - LOFFSET(h);
sp->bt_nrecs += NUM_ENT(h);
break;
case P_DUPLICATE:
++sp->bt_dup_pg;
/* XXX MARGO: sp->bt_dup_pgfree; */
break;
case P_OVERFLOW:
++sp->bt_over_pg;
/* XXX MARGO: sp->bt_over_pgfree; */
break;
default:
(void)memp_fput(dbp->mpf, h, 0);
(void)__BT_LPUT(dbp, lock);
return (__db_pgfmt(dbp, pgno));
}
(void)memp_fput(dbp->mpf, h, 0);
(void)__BT_LPUT(dbp, lock);
if (++pgno > lastpgno)
break;
if (__bam_lget(dbp, 0, pgno, DB_LOCK_READ, &lock))
break;
if (memp_fget(dbp->mpf, &pgno, 0, &h) != 0) {
(void)__BT_LPUT(dbp, lock);
break;
}
}
done: *(DB_BTREE_STAT **)spp = sp;
ret = 0;
err: PUTHANDLE(dbp);
return (ret);
}
/*
* __bam_add_mstat --
* Add the local statistics to the meta-data page statistics.
*
* PUBLIC: void __bam_add_mstat __P((DB_BTREE_LSTAT *, DB_BTREE_LSTAT *));
*/
void
__bam_add_mstat(from, to)
DB_BTREE_LSTAT *from;
DB_BTREE_LSTAT *to;
{
to->bt_freed += from->bt_freed;
to->bt_pfxsaved += from->bt_pfxsaved;
to->bt_split += from->bt_split;
to->bt_rootsplit += from->bt_rootsplit;
to->bt_fastsplit += from->bt_fastsplit;
to->bt_added += from->bt_added;
to->bt_deleted += from->bt_deleted;
to->bt_get += from->bt_get;
to->bt_cache_hit += from->bt_cache_hit;
to->bt_cache_miss += from->bt_cache_miss;
}
/*
* __bam_add_rstat --
* Add the local statistics to the returned statistics.
*/
static void
__bam_add_rstat(from, to)
DB_BTREE_LSTAT *from;
DB_BTREE_STAT *to;
{
to->bt_freed += from->bt_freed;
to->bt_pfxsaved += from->bt_pfxsaved;
to->bt_split += from->bt_split;
to->bt_rootsplit += from->bt_rootsplit;
to->bt_fastsplit += from->bt_fastsplit;
to->bt_added += from->bt_added;
to->bt_deleted += from->bt_deleted;
to->bt_get += from->bt_get;
to->bt_cache_hit += from->bt_cache_hit;
to->bt_cache_miss += from->bt_cache_miss;
}
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