]>
Commit | Line | Data |
---|---|---|
6d7e8eda | 1 | /* Copyright (c) 1998-2023 Free Software Foundation, Inc. |
d67281a7 | 2 | This file is part of the GNU C Library. |
d67281a7 UD |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
d67281a7 UD |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
d67281a7 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
d67281a7 | 17 | |
67479a70 UD |
18 | #include <errno.h> |
19 | #include <error.h> | |
a95a08b4 | 20 | #include <inttypes.h> |
67479a70 | 21 | #include <langinfo.h> |
d67281a7 UD |
22 | #include <stdio.h> |
23 | #include <stdlib.h> | |
67479a70 | 24 | #include <string.h> |
0b20008e | 25 | #include <sys/socket.h> |
d67281a7 | 26 | #include <unistd.h> |
4360eafd | 27 | #include <libintl.h> |
67479a70 | 28 | |
d67281a7 | 29 | #include "nscd.h" |
67479a70 | 30 | #include "dbg_log.h" |
74a30a58 UD |
31 | #include "selinux.h" |
32 | #ifdef HAVE_SELINUX | |
33 | # include <selinux/selinux.h> | |
34 | # include <selinux/avc.h> | |
35 | #endif /* HAVE_SELINUX */ | |
36 | ||
1e9522c6 FW |
37 | /* We use this to make sure the receiver is the same. The lower 16 |
38 | bits are reserved for flags indicating compilation variants. This | |
39 | version needs to be updated if the definition of struct statdata | |
40 | changes. */ | |
41 | #define STATDATA_VERSION 0x01020000U | |
67479a70 | 42 | |
1e9522c6 FW |
43 | #ifdef HAVE_SELINUX |
44 | # define STATDATA_VERSION_SELINUX_FLAG 0x0001U | |
45 | #else | |
46 | # define STATDATA_VERSION_SELINUX_FLAG 0x0000U | |
47 | #endif | |
48 | ||
49 | /* All flags affecting the struct statdata layout. */ | |
50 | #define STATDATA_VERSION_FLAGS STATDATA_VERSION_SELINUX_FLAG | |
51 | ||
52 | /* The full version number for struct statdata. */ | |
53 | #define STATDATA_VERSION_FULL (STATDATA_VERSION | STATDATA_VERSION_FLAGS) | |
67479a70 UD |
54 | |
55 | /* Statistic data for one database. */ | |
56 | struct dbstat | |
57 | { | |
58 | int enabled; | |
59 | int check_file; | |
d13a3c57 UD |
60 | int shared; |
61 | int persistent; | |
67479a70 UD |
62 | size_t module; |
63 | ||
64 | unsigned long int postimeout; | |
65 | unsigned long int negtimeout; | |
66 | ||
a95a08b4 UD |
67 | size_t nentries; |
68 | size_t maxnentries; | |
69 | size_t maxnsearched; | |
70 | size_t datasize; | |
71 | size_t dataused; | |
c86e6aec | 72 | |
a95a08b4 UD |
73 | uintmax_t poshit; |
74 | uintmax_t neghit; | |
75 | uintmax_t posmiss; | |
76 | uintmax_t negmiss; | |
c86e6aec | 77 | |
a95a08b4 UD |
78 | uintmax_t rdlockdelayed; |
79 | uintmax_t wrlockdelayed; | |
80 | ||
81 | uintmax_t addfailed; | |
67479a70 UD |
82 | }; |
83 | ||
1e9522c6 FW |
84 | /* Record for transmitting statistics. If this definition changes, |
85 | update STATDATA_VERSION above. */ | |
67479a70 UD |
86 | struct statdata |
87 | { | |
1e9522c6 | 88 | unsigned int version; /* Must be STATDATA_VERSION_FULL. */ |
67479a70 | 89 | int debug_level; |
c86e6aec | 90 | time_t runtime; |
a16e3585 | 91 | unsigned long int client_queued; |
4630012f UD |
92 | int nthreads; |
93 | int max_nthreads; | |
94 | int paranoia; | |
95 | time_t restart_interval; | |
d55d558b | 96 | unsigned int reload_count; |
67479a70 UD |
97 | int ndbs; |
98 | struct dbstat dbs[lastdb]; | |
74a30a58 UD |
99 | #ifdef HAVE_SELINUX |
100 | struct avc_cache_stats cstats; | |
101 | #endif /* HAVE_SELINUX */ | |
67479a70 UD |
102 | }; |
103 | ||
d67281a7 UD |
104 | |
105 | void | |
a95a08b4 | 106 | send_stats (int fd, struct database_dyn dbs[lastdb]) |
d67281a7 | 107 | { |
67479a70 UD |
108 | struct statdata data; |
109 | int cnt; | |
110 | ||
3cb26316 SP |
111 | memset (&data, 0, sizeof (data)); |
112 | ||
1e9522c6 | 113 | data.version = STATDATA_VERSION_FULL; |
67479a70 | 114 | data.debug_level = debug_level; |
c86e6aec | 115 | data.runtime = time (NULL) - start_time; |
a16e3585 | 116 | data.client_queued = client_queued; |
4630012f UD |
117 | data.nthreads = nthreads; |
118 | data.max_nthreads = max_nthreads; | |
119 | data.paranoia = paranoia; | |
120 | data.restart_interval = restart_interval; | |
d55d558b | 121 | data.reload_count = reload_count; |
67479a70 UD |
122 | data.ndbs = lastdb; |
123 | ||
124 | for (cnt = 0; cnt < lastdb; ++cnt) | |
125 | { | |
aadd7d9d | 126 | memset (&data.dbs[cnt], 0, sizeof (data.dbs[cnt])); |
67479a70 UD |
127 | data.dbs[cnt].enabled = dbs[cnt].enabled; |
128 | data.dbs[cnt].check_file = dbs[cnt].check_file; | |
d13a3c57 UD |
129 | data.dbs[cnt].shared = dbs[cnt].shared; |
130 | data.dbs[cnt].persistent = dbs[cnt].persistent; | |
67479a70 UD |
131 | data.dbs[cnt].postimeout = dbs[cnt].postimeout; |
132 | data.dbs[cnt].negtimeout = dbs[cnt].negtimeout; | |
aadd7d9d UD |
133 | if (dbs[cnt].head != NULL) |
134 | { | |
135 | data.dbs[cnt].module = dbs[cnt].head->module; | |
136 | data.dbs[cnt].poshit = dbs[cnt].head->poshit; | |
137 | data.dbs[cnt].neghit = dbs[cnt].head->neghit; | |
138 | data.dbs[cnt].posmiss = dbs[cnt].head->posmiss; | |
139 | data.dbs[cnt].negmiss = dbs[cnt].head->negmiss; | |
140 | data.dbs[cnt].nentries = dbs[cnt].head->nentries; | |
141 | data.dbs[cnt].maxnentries = dbs[cnt].head->maxnentries; | |
142 | data.dbs[cnt].datasize = dbs[cnt].head->data_size; | |
143 | data.dbs[cnt].dataused = dbs[cnt].head->first_free; | |
144 | data.dbs[cnt].maxnsearched = dbs[cnt].head->maxnsearched; | |
145 | data.dbs[cnt].rdlockdelayed = dbs[cnt].head->rdlockdelayed; | |
146 | data.dbs[cnt].wrlockdelayed = dbs[cnt].head->wrlockdelayed; | |
147 | data.dbs[cnt].addfailed = dbs[cnt].head->addfailed; | |
148 | } | |
67479a70 | 149 | } |
d67281a7 | 150 | |
74a30a58 UD |
151 | if (selinux_enabled) |
152 | nscd_avc_cache_stats (&data.cstats); | |
153 | ||
2c210d1e UD |
154 | if (TEMP_FAILURE_RETRY (send (fd, &data, sizeof (data), MSG_NOSIGNAL)) |
155 | != sizeof (data)) | |
d67281a7 | 156 | { |
67479a70 UD |
157 | char buf[256]; |
158 | dbg_log (_("cannot write statistics: %s"), | |
159 | strerror_r (errno, buf, sizeof (buf))); | |
d67281a7 | 160 | } |
67479a70 UD |
161 | } |
162 | ||
163 | ||
164 | int | |
165 | receive_print_stats (void) | |
166 | { | |
167 | struct statdata data; | |
168 | request_header req; | |
169 | ssize_t nbytes; | |
170 | int fd; | |
171 | int i; | |
a12ce44f | 172 | uid_t uid = getuid (); |
bb6e8ca3 UD |
173 | const char *yesstr = _("yes"); |
174 | const char *nostr = _("no"); | |
a12ce44f UD |
175 | |
176 | /* Find out whether there is another user but root allowed to | |
177 | request statistics. */ | |
178 | if (uid != 0) | |
179 | { | |
180 | /* User specified? */ | |
181 | if(stat_user == NULL || stat_uid != uid) | |
182 | { | |
183 | if (stat_user != NULL) | |
184 | error (EXIT_FAILURE, 0, | |
185 | _("Only root or %s is allowed to use this option!"), | |
186 | stat_user); | |
187 | else | |
188 | error (EXIT_FAILURE, 0, | |
189 | _("Only root is allowed to use this option!")); | |
190 | } | |
191 | } | |
d67281a7 | 192 | |
67479a70 UD |
193 | /* Open a socket to the running nscd. */ |
194 | fd = nscd_open_socket (); | |
195 | if (fd == -1) | |
196 | error (EXIT_FAILURE, 0, _("nscd not running!\n")); | |
197 | ||
198 | /* Send the request. */ | |
d67281a7 UD |
199 | req.version = NSCD_VERSION; |
200 | req.type = GETSTAT; | |
201 | req.key_len = 0; | |
2c210d1e UD |
202 | nbytes = TEMP_FAILURE_RETRY (send (fd, &req, sizeof (request_header), |
203 | MSG_NOSIGNAL)); | |
d67281a7 UD |
204 | if (nbytes != sizeof (request_header)) |
205 | { | |
67479a70 UD |
206 | int err = errno; |
207 | close (fd); | |
208 | error (EXIT_FAILURE, err, _("write incomplete")); | |
d67281a7 UD |
209 | } |
210 | ||
67479a70 UD |
211 | /* Read as much data as we expect. */ |
212 | if (TEMP_FAILURE_RETRY (read (fd, &data, sizeof (data))) != sizeof (data) | |
1e9522c6 | 213 | || (data.version != STATDATA_VERSION_FULL |
67479a70 | 214 | /* Yes, this is an assignment! */ |
c86e6aec | 215 | && (errno = EINVAL))) |
d67281a7 | 216 | { |
67479a70 UD |
217 | /* Not the right version. */ |
218 | int err = errno; | |
219 | close (fd); | |
220 | error (EXIT_FAILURE, err, _("cannot read statistics data")); | |
d67281a7 UD |
221 | } |
222 | ||
67479a70 UD |
223 | printf (_("nscd configuration:\n\n%15d server debug level\n"), |
224 | data.debug_level); | |
225 | ||
c86e6aec UD |
226 | /* We know that we can simply subtract time_t values. */ |
227 | unsigned long int diff = data.runtime; | |
228 | unsigned int ndays = 0; | |
229 | unsigned int nhours = 0; | |
230 | unsigned int nmins = 0; | |
231 | if (diff > 24 * 60 * 60) | |
232 | { | |
233 | ndays = diff / (24 * 60 * 60); | |
234 | diff %= 24 * 60 * 60; | |
235 | } | |
236 | if (diff > 60 * 60) | |
237 | { | |
238 | nhours = diff / (60 * 60); | |
239 | diff %= 60 * 60; | |
240 | } | |
241 | if (diff > 60) | |
242 | { | |
243 | nmins = diff / 60; | |
244 | diff %= 60; | |
245 | } | |
246 | if (ndays != 0) | |
247 | printf (_("%3ud %2uh %2um %2lus server runtime\n"), | |
248 | ndays, nhours, nmins, diff); | |
249 | else if (nhours != 0) | |
250 | printf (_(" %2uh %2um %2lus server runtime\n"), nhours, nmins, diff); | |
251 | else if (nmins != 0) | |
252 | printf (_(" %2um %2lus server runtime\n"), nmins, diff); | |
253 | else | |
254 | printf (_(" %2lus server runtime\n"), diff); | |
255 | ||
27e82856 UD |
256 | printf (_("%15d current number of threads\n" |
257 | "%15d maximum number of threads\n" | |
258 | "%15lu number of times clients had to wait\n" | |
4401d759 | 259 | "%15s paranoia mode enabled\n" |
d55d558b UD |
260 | "%15lu restart internal\n" |
261 | "%15u reload count\n"), | |
4630012f UD |
262 | data.nthreads, data.max_nthreads, data.client_queued, |
263 | data.paranoia ? yesstr : nostr, | |
d55d558b | 264 | (unsigned long int) data.restart_interval, data.reload_count); |
a16e3585 | 265 | |
67479a70 UD |
266 | for (i = 0; i < lastdb; ++i) |
267 | { | |
268 | unsigned long int hit = data.dbs[i].poshit + data.dbs[i].neghit; | |
269 | unsigned long int all = hit + data.dbs[i].posmiss + data.dbs[i].negmiss; | |
27e82856 UD |
270 | const char *enabled = data.dbs[i].enabled ? yesstr : nostr; |
271 | const char *check_file = data.dbs[i].check_file ? yesstr : nostr; | |
272 | const char *shared = data.dbs[i].shared ? yesstr : nostr; | |
273 | const char *persistent = data.dbs[i].persistent ? yesstr : nostr; | |
67479a70 UD |
274 | |
275 | if (enabled[0] == '\0') | |
276 | /* The locale does not provide this information so we have to | |
277 | translate it ourself. Since we should avoid short translation | |
278 | terms we artifically increase the length. */ | |
4401d759 | 279 | enabled = data.dbs[i].enabled ? yesstr : nostr; |
67479a70 | 280 | if (check_file[0] == '\0') |
4401d759 | 281 | check_file = data.dbs[i].check_file ? yesstr : nostr; |
d13a3c57 | 282 | if (shared[0] == '\0') |
4401d759 | 283 | shared = data.dbs[i].shared ? yesstr : nostr; |
d13a3c57 | 284 | if (persistent[0] == '\0') |
4401d759 | 285 | persistent = data.dbs[i].persistent ? yesstr : nostr; |
67479a70 UD |
286 | |
287 | if (all == 0) | |
288 | /* If nothing happened so far report a 0% hit rate. */ | |
289 | all = 1; | |
290 | ||
291 | printf (_("\n%s cache:\n\n" | |
292 | "%15s cache is enabled\n" | |
d13a3c57 UD |
293 | "%15s cache is persistent\n" |
294 | "%15s cache is shared\n" | |
a95a08b4 UD |
295 | "%15zu suggested size\n" |
296 | "%15zu total data pool size\n" | |
297 | "%15zu used data pool size\n" | |
c86e6aec UD |
298 | "%15lu seconds time to live for positive entries\n" |
299 | "%15lu seconds time to live for negative entries\n" | |
a95a08b4 UD |
300 | "%15" PRIuMAX " cache hits on positive entries\n" |
301 | "%15" PRIuMAX " cache hits on negative entries\n" | |
302 | "%15" PRIuMAX " cache misses on positive entries\n" | |
303 | "%15" PRIuMAX " cache misses on negative entries\n" | |
c86e6aec | 304 | "%15lu%% cache hit rate\n" |
a95a08b4 UD |
305 | "%15zu current number of cached values\n" |
306 | "%15zu maximum number of cached values\n" | |
307 | "%15zu maximum chain length searched\n" | |
308 | "%15" PRIuMAX " number of delays on rdlock\n" | |
309 | "%15" PRIuMAX " number of delays on wrlock\n" | |
310 | "%15" PRIuMAX " memory allocations failed\n" | |
67479a70 | 311 | "%15s check /etc/%s for changes\n"), |
d13a3c57 | 312 | dbnames[i], enabled, persistent, shared, |
67479a70 | 313 | data.dbs[i].module, |
a95a08b4 | 314 | data.dbs[i].datasize, data.dbs[i].dataused, |
67479a70 UD |
315 | data.dbs[i].postimeout, data.dbs[i].negtimeout, |
316 | data.dbs[i].poshit, data.dbs[i].neghit, | |
317 | data.dbs[i].posmiss, data.dbs[i].negmiss, | |
318 | (100 * hit) / all, | |
c86e6aec UD |
319 | data.dbs[i].nentries, data.dbs[i].maxnentries, |
320 | data.dbs[i].maxnsearched, | |
321 | data.dbs[i].rdlockdelayed, | |
a95a08b4 UD |
322 | data.dbs[i].wrlockdelayed, |
323 | data.dbs[i].addfailed, check_file, dbnames[i]); | |
67479a70 UD |
324 | } |
325 | ||
74a30a58 UD |
326 | if (selinux_enabled) |
327 | nscd_avc_print_stats (&data.cstats); | |
328 | ||
67479a70 UD |
329 | close (fd); |
330 | ||
331 | exit (0); | |
d67281a7 | 332 | } |