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