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bfff8b1b | 1 | /* Copyright (c) 1998-2017 Free Software Foundation, Inc. |
d67281a7 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1998. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
d67281a7 UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
d67281a7 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
d67281a7 | 18 | |
67479a70 UD |
19 | #include <errno.h> |
20 | #include <error.h> | |
a95a08b4 | 21 | #include <inttypes.h> |
67479a70 | 22 | #include <langinfo.h> |
d67281a7 UD |
23 | #include <stdio.h> |
24 | #include <stdlib.h> | |
67479a70 | 25 | #include <string.h> |
0b20008e | 26 | #include <sys/socket.h> |
d67281a7 | 27 | #include <unistd.h> |
4360eafd | 28 | #include <libintl.h> |
67479a70 | 29 | |
d67281a7 | 30 | #include "nscd.h" |
67479a70 | 31 | #include "dbg_log.h" |
74a30a58 UD |
32 | #include "selinux.h" |
33 | #ifdef HAVE_SELINUX | |
34 | # include <selinux/selinux.h> | |
35 | # include <selinux/avc.h> | |
36 | #endif /* HAVE_SELINUX */ | |
37 | ||
1e9522c6 FW |
38 | /* We use this to make sure the receiver is the same. The lower 16 |
39 | bits are reserved for flags indicating compilation variants. This | |
40 | version needs to be updated if the definition of struct statdata | |
41 | changes. */ | |
42 | #define STATDATA_VERSION 0x01020000U | |
67479a70 | 43 | |
1e9522c6 FW |
44 | #ifdef HAVE_SELINUX |
45 | # define STATDATA_VERSION_SELINUX_FLAG 0x0001U | |
46 | #else | |
47 | # define STATDATA_VERSION_SELINUX_FLAG 0x0000U | |
48 | #endif | |
49 | ||
50 | /* All flags affecting the struct statdata layout. */ | |
51 | #define STATDATA_VERSION_FLAGS STATDATA_VERSION_SELINUX_FLAG | |
52 | ||
53 | /* The full version number for struct statdata. */ | |
54 | #define STATDATA_VERSION_FULL (STATDATA_VERSION | STATDATA_VERSION_FLAGS) | |
67479a70 UD |
55 | |
56 | /* Statistic data for one database. */ | |
57 | struct dbstat | |
58 | { | |
59 | int enabled; | |
60 | int check_file; | |
d13a3c57 UD |
61 | int shared; |
62 | int persistent; | |
67479a70 UD |
63 | size_t module; |
64 | ||
65 | unsigned long int postimeout; | |
66 | unsigned long int negtimeout; | |
67 | ||
a95a08b4 UD |
68 | size_t nentries; |
69 | size_t maxnentries; | |
70 | size_t maxnsearched; | |
71 | size_t datasize; | |
72 | size_t dataused; | |
c86e6aec | 73 | |
a95a08b4 UD |
74 | uintmax_t poshit; |
75 | uintmax_t neghit; | |
76 | uintmax_t posmiss; | |
77 | uintmax_t negmiss; | |
c86e6aec | 78 | |
a95a08b4 UD |
79 | uintmax_t rdlockdelayed; |
80 | uintmax_t wrlockdelayed; | |
81 | ||
82 | uintmax_t addfailed; | |
67479a70 UD |
83 | }; |
84 | ||
1e9522c6 FW |
85 | /* Record for transmitting statistics. If this definition changes, |
86 | update STATDATA_VERSION above. */ | |
67479a70 UD |
87 | struct statdata |
88 | { | |
1e9522c6 | 89 | unsigned int version; /* Must be STATDATA_VERSION_FULL. */ |
67479a70 | 90 | int debug_level; |
c86e6aec | 91 | time_t runtime; |
a16e3585 | 92 | unsigned long int client_queued; |
4630012f UD |
93 | int nthreads; |
94 | int max_nthreads; | |
95 | int paranoia; | |
96 | time_t restart_interval; | |
d55d558b | 97 | unsigned int reload_count; |
67479a70 UD |
98 | int ndbs; |
99 | struct dbstat dbs[lastdb]; | |
74a30a58 UD |
100 | #ifdef HAVE_SELINUX |
101 | struct avc_cache_stats cstats; | |
102 | #endif /* HAVE_SELINUX */ | |
67479a70 UD |
103 | }; |
104 | ||
d67281a7 UD |
105 | |
106 | void | |
a95a08b4 | 107 | send_stats (int fd, struct database_dyn dbs[lastdb]) |
d67281a7 | 108 | { |
67479a70 UD |
109 | struct statdata data; |
110 | int cnt; | |
111 | ||
3cb26316 SP |
112 | memset (&data, 0, sizeof (data)); |
113 | ||
1e9522c6 | 114 | data.version = STATDATA_VERSION_FULL; |
67479a70 | 115 | data.debug_level = debug_level; |
c86e6aec | 116 | data.runtime = time (NULL) - start_time; |
a16e3585 | 117 | data.client_queued = client_queued; |
4630012f UD |
118 | data.nthreads = nthreads; |
119 | data.max_nthreads = max_nthreads; | |
120 | data.paranoia = paranoia; | |
121 | data.restart_interval = restart_interval; | |
d55d558b | 122 | data.reload_count = reload_count; |
67479a70 UD |
123 | data.ndbs = lastdb; |
124 | ||
125 | for (cnt = 0; cnt < lastdb; ++cnt) | |
126 | { | |
aadd7d9d | 127 | memset (&data.dbs[cnt], 0, sizeof (data.dbs[cnt])); |
67479a70 UD |
128 | data.dbs[cnt].enabled = dbs[cnt].enabled; |
129 | data.dbs[cnt].check_file = dbs[cnt].check_file; | |
d13a3c57 UD |
130 | data.dbs[cnt].shared = dbs[cnt].shared; |
131 | data.dbs[cnt].persistent = dbs[cnt].persistent; | |
67479a70 UD |
132 | data.dbs[cnt].postimeout = dbs[cnt].postimeout; |
133 | data.dbs[cnt].negtimeout = dbs[cnt].negtimeout; | |
aadd7d9d UD |
134 | if (dbs[cnt].head != NULL) |
135 | { | |
136 | data.dbs[cnt].module = dbs[cnt].head->module; | |
137 | data.dbs[cnt].poshit = dbs[cnt].head->poshit; | |
138 | data.dbs[cnt].neghit = dbs[cnt].head->neghit; | |
139 | data.dbs[cnt].posmiss = dbs[cnt].head->posmiss; | |
140 | data.dbs[cnt].negmiss = dbs[cnt].head->negmiss; | |
141 | data.dbs[cnt].nentries = dbs[cnt].head->nentries; | |
142 | data.dbs[cnt].maxnentries = dbs[cnt].head->maxnentries; | |
143 | data.dbs[cnt].datasize = dbs[cnt].head->data_size; | |
144 | data.dbs[cnt].dataused = dbs[cnt].head->first_free; | |
145 | data.dbs[cnt].maxnsearched = dbs[cnt].head->maxnsearched; | |
146 | data.dbs[cnt].rdlockdelayed = dbs[cnt].head->rdlockdelayed; | |
147 | data.dbs[cnt].wrlockdelayed = dbs[cnt].head->wrlockdelayed; | |
148 | data.dbs[cnt].addfailed = dbs[cnt].head->addfailed; | |
149 | } | |
67479a70 | 150 | } |
d67281a7 | 151 | |
74a30a58 UD |
152 | if (selinux_enabled) |
153 | nscd_avc_cache_stats (&data.cstats); | |
154 | ||
2c210d1e UD |
155 | if (TEMP_FAILURE_RETRY (send (fd, &data, sizeof (data), MSG_NOSIGNAL)) |
156 | != sizeof (data)) | |
d67281a7 | 157 | { |
67479a70 UD |
158 | char buf[256]; |
159 | dbg_log (_("cannot write statistics: %s"), | |
160 | strerror_r (errno, buf, sizeof (buf))); | |
d67281a7 | 161 | } |
67479a70 UD |
162 | } |
163 | ||
164 | ||
165 | int | |
166 | receive_print_stats (void) | |
167 | { | |
168 | struct statdata data; | |
169 | request_header req; | |
170 | ssize_t nbytes; | |
171 | int fd; | |
172 | int i; | |
a12ce44f | 173 | uid_t uid = getuid (); |
bb6e8ca3 UD |
174 | const char *yesstr = _("yes"); |
175 | const char *nostr = _("no"); | |
a12ce44f UD |
176 | |
177 | /* Find out whether there is another user but root allowed to | |
178 | request statistics. */ | |
179 | if (uid != 0) | |
180 | { | |
181 | /* User specified? */ | |
182 | if(stat_user == NULL || stat_uid != uid) | |
183 | { | |
184 | if (stat_user != NULL) | |
185 | error (EXIT_FAILURE, 0, | |
186 | _("Only root or %s is allowed to use this option!"), | |
187 | stat_user); | |
188 | else | |
189 | error (EXIT_FAILURE, 0, | |
190 | _("Only root is allowed to use this option!")); | |
191 | } | |
192 | } | |
d67281a7 | 193 | |
67479a70 UD |
194 | /* Open a socket to the running nscd. */ |
195 | fd = nscd_open_socket (); | |
196 | if (fd == -1) | |
197 | error (EXIT_FAILURE, 0, _("nscd not running!\n")); | |
198 | ||
199 | /* Send the request. */ | |
d67281a7 UD |
200 | req.version = NSCD_VERSION; |
201 | req.type = GETSTAT; | |
202 | req.key_len = 0; | |
2c210d1e UD |
203 | nbytes = TEMP_FAILURE_RETRY (send (fd, &req, sizeof (request_header), |
204 | MSG_NOSIGNAL)); | |
d67281a7 UD |
205 | if (nbytes != sizeof (request_header)) |
206 | { | |
67479a70 UD |
207 | int err = errno; |
208 | close (fd); | |
209 | error (EXIT_FAILURE, err, _("write incomplete")); | |
d67281a7 UD |
210 | } |
211 | ||
67479a70 UD |
212 | /* Read as much data as we expect. */ |
213 | if (TEMP_FAILURE_RETRY (read (fd, &data, sizeof (data))) != sizeof (data) | |
1e9522c6 | 214 | || (data.version != STATDATA_VERSION_FULL |
67479a70 | 215 | /* Yes, this is an assignment! */ |
c86e6aec | 216 | && (errno = EINVAL))) |
d67281a7 | 217 | { |
67479a70 UD |
218 | /* Not the right version. */ |
219 | int err = errno; | |
220 | close (fd); | |
221 | error (EXIT_FAILURE, err, _("cannot read statistics data")); | |
d67281a7 UD |
222 | } |
223 | ||
67479a70 UD |
224 | printf (_("nscd configuration:\n\n%15d server debug level\n"), |
225 | data.debug_level); | |
226 | ||
c86e6aec UD |
227 | /* We know that we can simply subtract time_t values. */ |
228 | unsigned long int diff = data.runtime; | |
229 | unsigned int ndays = 0; | |
230 | unsigned int nhours = 0; | |
231 | unsigned int nmins = 0; | |
232 | if (diff > 24 * 60 * 60) | |
233 | { | |
234 | ndays = diff / (24 * 60 * 60); | |
235 | diff %= 24 * 60 * 60; | |
236 | } | |
237 | if (diff > 60 * 60) | |
238 | { | |
239 | nhours = diff / (60 * 60); | |
240 | diff %= 60 * 60; | |
241 | } | |
242 | if (diff > 60) | |
243 | { | |
244 | nmins = diff / 60; | |
245 | diff %= 60; | |
246 | } | |
247 | if (ndays != 0) | |
248 | printf (_("%3ud %2uh %2um %2lus server runtime\n"), | |
249 | ndays, nhours, nmins, diff); | |
250 | else if (nhours != 0) | |
251 | printf (_(" %2uh %2um %2lus server runtime\n"), nhours, nmins, diff); | |
252 | else if (nmins != 0) | |
253 | printf (_(" %2um %2lus server runtime\n"), nmins, diff); | |
254 | else | |
255 | printf (_(" %2lus server runtime\n"), diff); | |
256 | ||
27e82856 UD |
257 | printf (_("%15d current number of threads\n" |
258 | "%15d maximum number of threads\n" | |
259 | "%15lu number of times clients had to wait\n" | |
4401d759 | 260 | "%15s paranoia mode enabled\n" |
d55d558b UD |
261 | "%15lu restart internal\n" |
262 | "%15u reload count\n"), | |
4630012f UD |
263 | data.nthreads, data.max_nthreads, data.client_queued, |
264 | data.paranoia ? yesstr : nostr, | |
d55d558b | 265 | (unsigned long int) data.restart_interval, data.reload_count); |
a16e3585 | 266 | |
67479a70 UD |
267 | for (i = 0; i < lastdb; ++i) |
268 | { | |
269 | unsigned long int hit = data.dbs[i].poshit + data.dbs[i].neghit; | |
270 | unsigned long int all = hit + data.dbs[i].posmiss + data.dbs[i].negmiss; | |
27e82856 UD |
271 | const char *enabled = data.dbs[i].enabled ? yesstr : nostr; |
272 | const char *check_file = data.dbs[i].check_file ? yesstr : nostr; | |
273 | const char *shared = data.dbs[i].shared ? yesstr : nostr; | |
274 | const char *persistent = data.dbs[i].persistent ? yesstr : nostr; | |
67479a70 UD |
275 | |
276 | if (enabled[0] == '\0') | |
277 | /* The locale does not provide this information so we have to | |
278 | translate it ourself. Since we should avoid short translation | |
279 | terms we artifically increase the length. */ | |
4401d759 | 280 | enabled = data.dbs[i].enabled ? yesstr : nostr; |
67479a70 | 281 | if (check_file[0] == '\0') |
4401d759 | 282 | check_file = data.dbs[i].check_file ? yesstr : nostr; |
d13a3c57 | 283 | if (shared[0] == '\0') |
4401d759 | 284 | shared = data.dbs[i].shared ? yesstr : nostr; |
d13a3c57 | 285 | if (persistent[0] == '\0') |
4401d759 | 286 | persistent = data.dbs[i].persistent ? yesstr : nostr; |
67479a70 UD |
287 | |
288 | if (all == 0) | |
289 | /* If nothing happened so far report a 0% hit rate. */ | |
290 | all = 1; | |
291 | ||
292 | printf (_("\n%s cache:\n\n" | |
293 | "%15s cache is enabled\n" | |
d13a3c57 UD |
294 | "%15s cache is persistent\n" |
295 | "%15s cache is shared\n" | |
a95a08b4 UD |
296 | "%15zu suggested size\n" |
297 | "%15zu total data pool size\n" | |
298 | "%15zu used data pool size\n" | |
c86e6aec UD |
299 | "%15lu seconds time to live for positive entries\n" |
300 | "%15lu seconds time to live for negative entries\n" | |
a95a08b4 UD |
301 | "%15" PRIuMAX " cache hits on positive entries\n" |
302 | "%15" PRIuMAX " cache hits on negative entries\n" | |
303 | "%15" PRIuMAX " cache misses on positive entries\n" | |
304 | "%15" PRIuMAX " cache misses on negative entries\n" | |
c86e6aec | 305 | "%15lu%% cache hit rate\n" |
a95a08b4 UD |
306 | "%15zu current number of cached values\n" |
307 | "%15zu maximum number of cached values\n" | |
308 | "%15zu maximum chain length searched\n" | |
309 | "%15" PRIuMAX " number of delays on rdlock\n" | |
310 | "%15" PRIuMAX " number of delays on wrlock\n" | |
311 | "%15" PRIuMAX " memory allocations failed\n" | |
67479a70 | 312 | "%15s check /etc/%s for changes\n"), |
d13a3c57 | 313 | dbnames[i], enabled, persistent, shared, |
67479a70 | 314 | data.dbs[i].module, |
a95a08b4 | 315 | data.dbs[i].datasize, data.dbs[i].dataused, |
67479a70 UD |
316 | data.dbs[i].postimeout, data.dbs[i].negtimeout, |
317 | data.dbs[i].poshit, data.dbs[i].neghit, | |
318 | data.dbs[i].posmiss, data.dbs[i].negmiss, | |
319 | (100 * hit) / all, | |
c86e6aec UD |
320 | data.dbs[i].nentries, data.dbs[i].maxnentries, |
321 | data.dbs[i].maxnsearched, | |
322 | data.dbs[i].rdlockdelayed, | |
a95a08b4 UD |
323 | data.dbs[i].wrlockdelayed, |
324 | data.dbs[i].addfailed, check_file, dbnames[i]); | |
67479a70 UD |
325 | } |
326 | ||
74a30a58 UD |
327 | if (selinux_enabled) |
328 | nscd_avc_print_stats (&data.cstats); | |
329 | ||
67479a70 UD |
330 | close (fd); |
331 | ||
332 | exit (0); | |
d67281a7 | 333 | } |