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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
|
/* mdb_stat.c - memory-mapped database status tool */
/*
* Copyright 2011-2020 Howard Chu, Symas Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "lmdb.h"
#ifdef _WIN32
#define Z "I"
#else
#define Z "z"
#endif
static void prstat(MDB_stat *ms)
{
#if 0
printf(" Page size: %u\n", ms->ms_psize);
#endif
printf(" Tree depth: %u\n", ms->ms_depth);
printf(" Branch pages: %"Z"u\n", ms->ms_branch_pages);
printf(" Leaf pages: %"Z"u\n", ms->ms_leaf_pages);
printf(" Overflow pages: %"Z"u\n", ms->ms_overflow_pages);
printf(" Entries: %"Z"u\n", ms->ms_entries);
}
static void usage(char *prog)
{
fprintf(stderr, "usage: %s [-V] [-n] [-e] [-r[r]] [-f[f[f]]] [-a|-s subdb] dbpath\n", prog);
exit(EXIT_FAILURE);
}
int main(int argc, char *argv[])
{
int i, rc;
MDB_env *env;
MDB_txn *txn;
MDB_dbi dbi;
MDB_stat mst;
MDB_envinfo mei;
char *prog = argv[0];
char *envname;
char *subname = NULL;
int alldbs = 0, envinfo = 0, envflags = 0, freinfo = 0, rdrinfo = 0;
if (argc < 2) {
usage(prog);
}
/* -a: print stat of main DB and all subDBs
* -s: print stat of only the named subDB
* -e: print env info
* -f: print freelist info
* -r: print reader info
* -n: use NOSUBDIR flag on env_open
* -V: print version and exit
* (default) print stat of only the main DB
*/
while ((i = getopt(argc, argv, "Vaefnrs:")) != EOF) {
switch(i) {
case 'V':
printf("%s\n", MDB_VERSION_STRING);
exit(0);
break;
case 'a':
if (subname)
usage(prog);
alldbs++;
break;
case 'e':
envinfo++;
break;
case 'f':
freinfo++;
break;
case 'n':
envflags |= MDB_NOSUBDIR;
break;
case 'r':
rdrinfo++;
break;
case 's':
if (alldbs)
usage(prog);
subname = optarg;
break;
default:
usage(prog);
}
}
if (optind != argc - 1)
usage(prog);
envname = argv[optind];
rc = mdb_env_create(&env);
if (rc) {
fprintf(stderr, "mdb_env_create failed, error %d %s\n", rc, mdb_strerror(rc));
return EXIT_FAILURE;
}
if (alldbs || subname) {
mdb_env_set_maxdbs(env, 4);
}
rc = mdb_env_open(env, envname, envflags | MDB_RDONLY, 0664);
if (rc) {
fprintf(stderr, "mdb_env_open failed, error %d %s\n", rc, mdb_strerror(rc));
goto env_close;
}
if (envinfo) {
(void)mdb_env_stat(env, &mst);
(void)mdb_env_info(env, &mei);
printf("Environment Info\n");
printf(" Map address: %p\n", mei.me_mapaddr);
printf(" Map size: %"Z"u\n", mei.me_mapsize);
printf(" Page size: %u\n", mst.ms_psize);
printf(" Max pages: %"Z"u\n", mei.me_mapsize / mst.ms_psize);
printf(" Number of pages used: %"Z"u\n", mei.me_last_pgno+1);
printf(" Last transaction ID: %"Z"u\n", mei.me_last_txnid);
printf(" Max readers: %u\n", mei.me_maxreaders);
printf(" Number of readers used: %u\n", mei.me_numreaders);
}
if (rdrinfo) {
printf("Reader Table Status\n");
rc = mdb_reader_list(env, (MDB_msg_func *)fputs, stdout);
if (rdrinfo > 1) {
int dead;
mdb_reader_check(env, &dead);
printf(" %d stale readers cleared.\n", dead);
rc = mdb_reader_list(env, (MDB_msg_func *)fputs, stdout);
}
if (!(subname || alldbs || freinfo))
goto env_close;
}
rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn);
if (rc) {
fprintf(stderr, "mdb_txn_begin failed, error %d %s\n", rc, mdb_strerror(rc));
goto env_close;
}
if (freinfo) {
MDB_cursor *cursor;
MDB_val key, data;
size_t pages = 0, *iptr;
printf("Freelist Status\n");
dbi = 0;
rc = mdb_cursor_open(txn, dbi, &cursor);
if (rc) {
fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc));
goto txn_abort;
}
rc = mdb_stat(txn, dbi, &mst);
if (rc) {
fprintf(stderr, "mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc));
goto txn_abort;
}
prstat(&mst);
while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
iptr = data.mv_data;
pages += *iptr;
if (freinfo > 1) {
char *bad = "";
size_t pg, prev;
ssize_t i, j, span = 0;
j = *iptr++;
for (i = j, prev = 1; --i >= 0; ) {
pg = iptr[i];
if (pg <= prev)
bad = " [bad sequence]";
prev = pg;
pg += span;
for (; i >= span && iptr[i-span] == pg; span++, pg++) ;
}
printf(" Transaction %"Z"u, %"Z"d pages, maxspan %"Z"d%s\n",
*(size_t *)key.mv_data, j, span, bad);
if (freinfo > 2) {
for (--j; j >= 0; ) {
pg = iptr[j];
for (span=1; --j >= 0 && iptr[j] == pg+span; span++) ;
printf(span>1 ? " %9"Z"u[%"Z"d]\n" : " %9"Z"u\n",
pg, span);
}
}
}
}
mdb_cursor_close(cursor);
printf(" Free pages: %"Z"u\n", pages);
}
rc = mdb_open(txn, subname, 0, &dbi);
if (rc) {
fprintf(stderr, "mdb_open failed, error %d %s\n", rc, mdb_strerror(rc));
goto txn_abort;
}
rc = mdb_stat(txn, dbi, &mst);
if (rc) {
fprintf(stderr, "mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc));
goto txn_abort;
}
printf("Status of %s\n", subname ? subname : "Main DB");
prstat(&mst);
if (alldbs) {
MDB_cursor *cursor;
MDB_val key;
rc = mdb_cursor_open(txn, dbi, &cursor);
if (rc) {
fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc));
goto txn_abort;
}
while ((rc = mdb_cursor_get(cursor, &key, NULL, MDB_NEXT_NODUP)) == 0) {
char *str;
MDB_dbi db2;
if (memchr(key.mv_data, '\0', key.mv_size))
continue;
str = malloc(key.mv_size+1);
memcpy(str, key.mv_data, key.mv_size);
str[key.mv_size] = '\0';
rc = mdb_open(txn, str, 0, &db2);
if (rc == MDB_SUCCESS)
printf("Status of %s\n", str);
free(str);
if (rc) continue;
rc = mdb_stat(txn, db2, &mst);
if (rc) {
fprintf(stderr, "mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc));
goto txn_abort;
}
prstat(&mst);
mdb_close(env, db2);
}
mdb_cursor_close(cursor);
}
if (rc == MDB_NOTFOUND)
rc = MDB_SUCCESS;
mdb_close(env, dbi);
txn_abort:
mdb_txn_abort(txn);
env_close:
mdb_env_close(env);
return rc ? EXIT_FAILURE : EXIT_SUCCESS;
}
|