1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2011, Joyent, Inc. All rights reserved.
25 */
26
27 #include <sys/types.h>
28 #include <sys/stat.h>
29 #include <sys/wait.h>
30 #include <fcntl.h>
31 #include <errno.h>
32 #include <signal.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <strings.h>
36 #include <unistd.h>
37 #include <libscf.h>
38 #include <libscf_priv.h>
39 #include <libintl.h>
40 #include <locale.h>
41 #include <zone.h>
42 #include <libzonecfg.h>
43
44 #include "utils.h"
45 #include "rcapd.h"
46 #include "rcapd_conf.h"
47 #include "rcapd_stat.h"
48
49 static void
50 usage()
51 {
52 (void) fprintf(stderr,
53 gettext("usage: rcapadm\n"
54 " [-E|-D] "
55 "# enable/disable rcapd\n"
56 " [-n] "
57 "# don't start/stop rcapd\n"
58 " [-i <scan|sample|report|config>=value] "
59 "# set intervals\n"
60 " [-c <percent>] "
61 "# set memory cap\n"
62 " "
63 "# enforcement threshold\n"
64 " [-z <zonename> -m <max-rss>] "
65 "# update zone memory cap\n"));
66 exit(E_USAGE);
67 }
68
69 static rcfg_t conf;
70 static int enable = -1;
71 static int disable = -1;
72 static int pressure = -1;
73 static int no_starting_stopping = -1;
74 static int scan_interval = -1;
75 static int report_interval = -1;
76 static int config_interval = -1;
77 static int sample_interval = -1;
78
79 static char *subopt_v[] = {
80 "scan",
81 "sample",
82 "report",
83 "config",
84 NULL
85 };
86
87 typedef enum {
88 OPT_SCAN = 0,
89 OPT_SAMPLE,
90 OPT_REPORT,
91 OPT_CONFIG
92 } subopt_idx_t;
93
94 static void
95 print_state(void)
96 {
97 scf_simple_prop_t *persistent_prop = NULL;
98 scf_simple_prop_t *temporary_prop = NULL;
99 uint8_t *persistent = NULL;
100 uint8_t *temporary = NULL;
101 scf_handle_t *h;
102 /* LINTED: conditionally assigned and used in function */
103 ssize_t numvals;
104
105 if ((h = scf_handle_create(SCF_VERSION)) == NULL ||
106 scf_handle_bind(h) != 0)
107 goto out;
108
109 if ((persistent_prop = scf_simple_prop_get(h, RCAP_FMRI,
110 SCF_PG_GENERAL, SCF_PROPERTY_ENABLED)) != NULL && (numvals =
111 scf_simple_prop_numvalues(persistent_prop)) > 0)
112 persistent = scf_simple_prop_next_boolean(persistent_prop);
113
114 if ((temporary_prop = scf_simple_prop_get(h, RCAP_FMRI,
115 SCF_PG_GENERAL_OVR, SCF_PROPERTY_ENABLED)) != NULL && (numvals =
116 scf_simple_prop_numvalues(temporary_prop)) > 0)
117 temporary = scf_simple_prop_next_boolean(temporary_prop);
118
119 out:
120 if (!persistent)
121 (void) printf(gettext(" "
122 "state: unknown"));
123 else if (temporary && *temporary != *persistent)
124 (void) printf(gettext(" "
125 "state: %s (%s at next boot)\n"), *temporary ?
126 gettext("enabled") : gettext("disabled"), *persistent ?
127 gettext("enabled") : gettext("disabled"));
128 else
129 (void) printf(gettext(" "
130 "state: %s\n"), *persistent ? gettext("enabled") :
131 gettext("disabled"));
132
133 (void) printf(gettext(" memory cap enforcement"
134 " threshold: %d%%\n"), conf.rcfg_memory_cap_enforcement_pressure);
135 (void) printf(gettext(" process scan rate"
136 " (sec): %d\n"), conf.rcfg_proc_walk_interval);
137 (void) printf(gettext(" reconfiguration rate"
138 " (sec): %d\n"), conf.rcfg_reconfiguration_interval);
139 (void) printf(gettext(" report rate"
140 " (sec): %d\n"), conf.rcfg_report_interval);
141 (void) printf(gettext(" RSS sampling rate"
142 " (sec): %d\n"), conf.rcfg_rss_sample_interval);
143
144 scf_simple_prop_free(temporary_prop);
145 scf_simple_prop_free(persistent_prop);
146 scf_handle_destroy(h);
147 }
148
149 static int
150 set_zone_cap(char *zonename, uint64_t mcap)
151 {
152 char cmd[128 + ZONENAME_MAX];
153
154 (void) snprintf(cmd, sizeof (cmd), "/usr/bin/prctl -r "
155 "-n zone.max-physical-memory -v %llu -i zone %s", mcap, zonename);
156 return (system(cmd));
157 }
158
159 /*
160 * Update the in-kernel memory cap for the specified zone.
161 */
162 static int
163 update_zone_mcap(char *zonename, char *maxrss)
164 {
165 uint64_t num;
166
167 if (getzoneid() != GLOBAL_ZONEID || zonecfg_in_alt_root())
168 return (E_SUCCESS);
169
170 /* get the running zone from the kernel */
171 if (getzoneidbyname(zonename) == -1) {
172 (void) fprintf(stderr, gettext("zone '%s' must be running\n"),
173 zonename);
174 return (E_ERROR);
175 }
176
177 if (zonecfg_str_to_bytes(maxrss, &num) == -1) {
178 (void) fprintf(stderr, gettext("invalid max-rss value\n"));
179 return (E_ERROR);
180 }
181
182 if (set_zone_cap(zonename, num) == -1) {
183 (void) fprintf(stderr, gettext("could not set memory "
184 "cap for zone '%s'\n"), zonename);
185 return (E_ERROR);
186 }
187
188 return (E_SUCCESS);
189 }
190
191 int
192 main(int argc, char *argv[])
193 {
194 char *subopts, *optval;
195 int modified = 0;
196 boolean_t refresh = B_FALSE;
197 int opt;
198 char *zonename;
199 char *maxrss = NULL;
200
201 (void) setpname("rcapadm");
202 (void) setlocale(LC_ALL, "");
203 (void) textdomain(TEXT_DOMAIN);
204
205 while ((opt = getopt(argc, argv, "DEc:i:m:nz:")) != EOF) {
206 switch (opt) {
207 case 'n':
208 no_starting_stopping = 1;
209 break;
210 case 'c':
211 if ((pressure = xatoi(optarg)) < 0 ||
212 pressure > 100 ||
213 errno == EINVAL)
214 usage();
215 modified++;
216 break;
217 case 'E':
218 enable = 1;
219 disable = 0;
220 break;
221 case 'D':
222 disable = 1;
223 enable = 0;
224 break;
225 case 'i':
226 subopts = optarg;
227 while (*subopts != '\0') {
228 switch (getsubopt(&subopts, subopt_v,
229 &optval)) {
230 case OPT_SCAN:
231 if (optval == NULL ||
232 (scan_interval =
233 xatoi(optval)) <= 0)
234 usage();
235 break;
236 case OPT_SAMPLE:
237 if (optval == NULL ||
238 (sample_interval =
239 xatoi(optval)) <= 0)
240 usage();
241 break;
242 case OPT_REPORT:
243 if (optval == NULL ||
244 (report_interval =
245 xatoi(optval)) < 0)
246 usage();
247 break;
248 case OPT_CONFIG:
249 if (optval == NULL ||
250 (config_interval =
251 xatoi(optval)) < 0)
252 usage();
253 break;
254 default:
255 usage();
256 }
257 }
258 modified++;
259 break;
260 case 'm':
261 maxrss = optarg;
262 break;
263 case 'z':
264 refresh = B_TRUE;
265 zonename = optarg;
266 break;
267 default:
268 usage();
269 }
270 }
271
272 /* the -z & -m options must be used together */
273 if (argc > optind || (refresh && maxrss == NULL) ||
274 (!refresh && maxrss != NULL))
275 usage();
276
277 if (refresh && (no_starting_stopping > 0 || modified))
278 usage();
279
280 /*
281 * disable/enable before reading configuration from the repository
282 * which may fail and prevents the disabling/enabling to complete.
283 */
284 if (disable > 0) {
285 if (smf_disable_instance(RCAP_FMRI, no_starting_stopping > 0
286 ? SMF_AT_NEXT_BOOT : 0) != 0)
287 die(gettext("cannot disable service: %s\n"),
288 scf_strerror(scf_error()));
289 }
290
291 if (enable > 0) {
292 if (smf_enable_instance(RCAP_FMRI, no_starting_stopping > 0
293 ? SMF_AT_NEXT_BOOT : 0) != 0)
294 die(gettext("cannot enable service: %s\n"),
295 scf_strerror(scf_error()));
296 }
297
298 if (rcfg_read(&conf, NULL) != E_SUCCESS) {
299 /*
300 * If instance is enabled, put it in maintenance since we
301 * failed to read configuration from the repository or
302 * create statistics file.
303 */
304 if (strcmp(smf_get_state(RCAP_FMRI),
305 SCF_STATE_STRING_DISABLED) != 0)
306 (void) smf_maintain_instance(RCAP_FMRI, 0);
307
308 die(gettext("resource caps not configured\n"));
309 } else {
310 /* Done reading configuration */
311 if (strcmp(conf.rcfg_mode_name, "project") != 0) {
312 warn(gettext("%s mode specification ignored -- using"
313 " project mode\n"), conf.rcfg_mode_name);
314 conf.rcfg_mode_name = "project";
315 conf.rcfg_mode = rctype_project;
316 }
317 }
318
319 if (refresh)
320 return (update_zone_mcap(zonename, maxrss));
321
322 if (modified) {
323 if (pressure >= 0)
324 conf.rcfg_memory_cap_enforcement_pressure = pressure;
325 if (config_interval >= 0)
326 conf.rcfg_reconfiguration_interval = config_interval;
327 if (scan_interval >= 0)
328 conf.rcfg_proc_walk_interval = scan_interval;
329 if (report_interval >= 0)
330 conf.rcfg_report_interval = report_interval;
331 if (sample_interval >= 0)
332 conf.rcfg_rss_sample_interval = sample_interval;
333
334 /*
335 * Modify configuration with the new parameter(s). The
336 * function will exit if it fails.
337 */
338 if ((modify_config(&conf)) != 0)
339 die(gettext("Error updating repository \n"));
340
341 if (smf_refresh_instance(RCAP_FMRI) != 0)
342 die(gettext("cannot refresh service: %s\n"),
343 scf_strerror(scf_error()));
344 }
345
346 /*
347 * Display current configuration
348 */
349 print_state();
350 return (E_SUCCESS);
351 }