1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996, 1997, 1998
* Sleepycat Software. All rights reserved.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)bt_stat.c 10.27 (Sleepycat) 11/25/98";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <errno.h>
#include <string.h>
#endif
#include "db_int.h"
#include "db_page.h"
#include "btree.h"
/*
* __bam_stat --
* Gather/print the btree statistics
*
* PUBLIC: int __bam_stat __P((DB *, void *, void *(*)(size_t), u_int32_t));
*/
int
__bam_stat(dbp, spp, db_malloc, flags)
DB *dbp;
void *spp;
void *(*db_malloc) __P((size_t));
u_int32_t flags;
{
BTMETA *meta;
BTREE *t;
DBC *dbc;
DB_BTREE_STAT *sp;
DB_LOCK lock;
PAGE *h;
db_pgno_t lastpgno, pgno;
int ret, t_ret;
DB_PANIC_CHECK(dbp);
/* Check for invalid flags. */
if ((ret = __db_statchk(dbp, flags)) != 0)
return (ret);
if ((ret = dbp->cursor(dbp, NULL, &dbc, 0)) != 0)
return (ret);
DEBUG_LWRITE(dbc, NULL, "bam_stat", NULL, NULL, flags);
t = dbp->internal;
if (spp == NULL)
return (0);
/* Allocate and clear the structure. */
if ((ret = __os_malloc(sizeof(*sp), db_malloc, &sp)) != 0)
goto err;
memset(sp, 0, sizeof(*sp));
/* If the app just wants the record count, make it fast. */
if (flags == DB_RECORDCOUNT) {
pgno = PGNO_ROOT;
if ((ret = __bam_lget(dbc, 0, pgno, DB_LOCK_READ, &lock)) != 0)
goto err;
if ((ret = memp_fget(dbp->mpf, &pgno, 0, (PAGE **)&h)) != 0)
goto err;
sp->bt_nrecs = RE_NREC(h);
(void)memp_fput(dbp->mpf, h, 0);
(void)__BT_LPUT(dbc, lock);
goto done;
}
/* Get the meta-data page. */
pgno = PGNO_METADATA;
if ((ret = __bam_lget(dbc, 0, pgno, DB_LOCK_READ, &lock)) != 0)
goto err;
if ((ret = memp_fget(dbp->mpf, &pgno, 0, (PAGE **)&meta)) != 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;
/* Walk the free list, counting pages. */
for (sp->bt_free = 0, pgno = meta->free; pgno != PGNO_INVALID;) {
++sp->bt_free;
if ((ret = memp_fget(dbp->mpf, &pgno, 0, &h)) != 0) {
(void)memp_fput(dbp->mpf, meta, 0);
(void)__BT_TLPUT(dbc, 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(dbc, 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(dbc, 0, PGNO_ROOT, DB_LOCK_READ, &lock)) != 0)
goto err;
if ((ret = memp_fget(dbp->mpf, &pgno, 0, &h)) != 0) {
(void)__BT_LPUT(dbc, 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(dbc, lock);
return (__db_pgfmt(dbp, pgno));
}
(void)memp_fput(dbp->mpf, h, 0);
(void)__BT_LPUT(dbc, lock);
if (++pgno > lastpgno)
break;
if (__bam_lget(dbc, 0, pgno, DB_LOCK_READ, &lock))
break;
if (memp_fget(dbp->mpf, &pgno, 0, &h) != 0) {
(void)__BT_LPUT(dbc, lock);
break;
}
}
done: *(DB_BTREE_STAT **)spp = sp;
ret = 0;
err: if ((t_ret = dbc->c_close(dbc)) != 0 && ret == 0)
ret = t_ret;
return (ret);
}
|
