rcapadm.c revision 4119:293019c5ea1f 
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 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26#pragma ident	"%Z%%M%	%I%	%E% SMI"
27
28#include <sys/types.h>
29#include <sys/stat.h>
30#include <sys/wait.h>
31#include <fcntl.h>
32#include <errno.h>
33#include <signal.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <strings.h>
37#include <unistd.h>
38#include <libscf.h>
39#include <libscf_priv.h>
40#include <libintl.h>
41#include <locale.h>
42#include <zone.h>
43#include <libzonecfg.h>
44
45#include "utils.h"
46#include "rcapd.h"
47#include "rcapd_conf.h"
48#include "rcapd_stat.h"
49
50static void
51usage()
52{
53	(void) fprintf(stderr,
54	    gettext("usage: rcapadm\n"
55	    "               [-E|-D]                                "
56	    "# enable/disable rcapd\n"
57	    "               [-n]                                   "
58	    "# don't start/stop rcapd\n"
59	    "               [-i <scan|sample|report|config>=value] "
60	    "# set intervals\n"
61	    "               [-c <percent>]                         "
62	    "# set memory cap\n"
63	    "                                                      "
64	    "# enforcement threshold\n"
65	    "               [-z <zonename> -m <max-rss>]               "
66	    "# update zone memory cap\n"));
67	exit(E_USAGE);
68}
69
70static rcfg_t conf;
71static int enable = -1;
72static int disable = -1;
73static int pressure = -1;
74static int no_starting_stopping = -1;
75static int scan_interval = -1;
76static int report_interval = -1;
77static int config_interval = -1;
78static int sample_interval = -1;
79
80static char *subopt_v[] = {
81	"scan",
82	"sample",
83	"report",
84	"config",
85	NULL
86};
87
88typedef enum {
89	OPT_SCAN = 0,
90	OPT_SAMPLE,
91	OPT_REPORT,
92	OPT_CONFIG
93} subopt_idx_t;
94
95static void
96print_state(void)
97{
98	scf_simple_prop_t *persistent_prop = NULL;
99	scf_simple_prop_t *temporary_prop = NULL;
100	uint8_t *persistent = NULL;
101	uint8_t *temporary = NULL;
102	scf_handle_t *h;
103	/* LINTED: conditionally assigned and used in function */
104	ssize_t numvals;
105
106	if ((h = scf_handle_create(SCF_VERSION)) == NULL ||
107	    scf_handle_bind(h) != 0)
108		goto out;
109
110	if ((persistent_prop = scf_simple_prop_get(h, RCAP_FMRI,
111	    SCF_PG_GENERAL, SCF_PROPERTY_ENABLED)) != NULL && (numvals =
112	    scf_simple_prop_numvalues(persistent_prop)) > 0)
113		persistent = scf_simple_prop_next_boolean(persistent_prop);
114
115	if ((temporary_prop = scf_simple_prop_get(h, RCAP_FMRI,
116	    SCF_PG_GENERAL_OVR, SCF_PROPERTY_ENABLED)) != NULL && (numvals =
117	    scf_simple_prop_numvalues(temporary_prop)) > 0)
118		temporary = scf_simple_prop_next_boolean(temporary_prop);
119
120out:
121	if (!persistent)
122		(void) printf(gettext("                                      "
123		    "state: unknown"));
124	else if (temporary && *temporary != *persistent)
125		(void) printf(gettext("                                      "
126		    "state: %s (%s at next boot)\n"), *temporary ?
127		    gettext("enabled") : gettext("disabled"), *persistent ?
128		    gettext("enabled") : gettext("disabled"));
129	else
130		(void) printf(gettext("                                      "
131		    "state: %s\n"), *persistent ? gettext("enabled") :
132			gettext("disabled"));
133
134	(void) printf(gettext("           memory cap enforcement"
135	    " threshold: %d%%\n"), conf.rcfg_memory_cap_enforcement_pressure);
136	(void) printf(gettext("                    process scan rate"
137	    " (sec): %d\n"), conf.rcfg_proc_walk_interval);
138	(void) printf(gettext("                 reconfiguration rate"
139	    " (sec): %d\n"), conf.rcfg_reconfiguration_interval);
140	(void) printf(gettext("                          report rate"
141	    " (sec): %d\n"), conf.rcfg_report_interval);
142	(void) printf(gettext("                    RSS sampling rate"
143	    " (sec): %d\n"), conf.rcfg_rss_sample_interval);
144
145	scf_simple_prop_free(temporary_prop);
146	scf_simple_prop_free(persistent_prop);
147	scf_handle_destroy(h);
148}
149
150/*
151 * Update the in-kernel memory cap for the specified zone.
152 */
153static int
154update_zone_mcap(char *zonename, char *maxrss)
155{
156	zoneid_t zone_id;
157	uint64_t num;
158
159	if (getzoneid() != GLOBAL_ZONEID || zonecfg_in_alt_root())
160		return (E_SUCCESS);
161
162	/* get the running zone from the kernel */
163	if ((zone_id = getzoneidbyname(zonename)) == -1) {
164		(void) fprintf(stderr, gettext("zone '%s' must be running\n"),
165		    zonename);
166		return (E_ERROR);
167	}
168
169	if (zonecfg_str_to_bytes(maxrss, &num) == -1) {
170		(void) fprintf(stderr, gettext("invalid max-rss value\n"));
171		return (E_ERROR);
172	}
173
174	if (zone_setattr(zone_id, ZONE_ATTR_PHYS_MCAP, &num, 0) == -1) {
175		(void) fprintf(stderr, gettext("could not set memory "
176		    "cap for zone '%s'\n"), zonename);
177		return (E_ERROR);
178	}
179
180	return (E_SUCCESS);
181}
182
183int
184main(int argc, char *argv[])
185{
186	char *subopts, *optval;
187	int modified = 0;
188	boolean_t refresh = B_FALSE;
189	int opt;
190	char *zonename;
191	char *maxrss = NULL;
192
193	(void) setprogname("rcapadm");
194	(void) setlocale(LC_ALL, "");
195	(void) textdomain(TEXT_DOMAIN);
196
197	while ((opt = getopt(argc, argv, "DEc:i:m:nz:")) != EOF) {
198		switch (opt) {
199		case 'n':
200			no_starting_stopping = 1;
201			break;
202		case 'c':
203			if ((pressure = xatoi(optarg)) < 0 ||
204			    pressure > 100 ||
205			    errno == EINVAL)
206				usage();
207			modified++;
208			break;
209		case 'E':
210			enable = 1;
211			disable = 0;
212			break;
213		case 'D':
214			disable = 1;
215			enable = 0;
216			break;
217		case 'i':
218			subopts = optarg;
219			while (*subopts != '\0') {
220				switch (getsubopt(&subopts, subopt_v,
221				    &optval)) {
222					case OPT_SCAN:
223						if (optval == NULL ||
224						    (scan_interval =
225						    xatoi(optval)) <= 0)
226							usage();
227						break;
228					case OPT_SAMPLE:
229						if (optval == NULL ||
230						    (sample_interval =
231						    xatoi(optval)) <= 0)
232							usage();
233						break;
234					case OPT_REPORT:
235						if (optval == NULL ||
236						    (report_interval =
237						    xatoi(optval)) < 0)
238							usage();
239						break;
240					case OPT_CONFIG:
241						if (optval == NULL ||
242						    (config_interval =
243						    xatoi(optval)) < 0)
244							usage();
245						break;
246					default:
247						usage();
248				}
249			}
250			modified++;
251			break;
252		case 'm':
253			maxrss = optarg;
254			break;
255		case 'z':
256			refresh = B_TRUE;
257			zonename = optarg;
258			break;
259		default:
260			usage();
261		}
262	}
263
264	/* the -z & -m options must be used together */
265	if (argc > optind || (refresh && maxrss == NULL) ||
266	    (!refresh && maxrss != NULL))
267		usage();
268
269	if (refresh && (no_starting_stopping > 0 || modified))
270		usage();
271
272	/*
273	 * disable/enable before reading configuration from the repository
274	 * which may fail and prevents the disabling/enabling to complete.
275	 */
276	if (disable > 0) {
277		if (smf_disable_instance(RCAP_FMRI, no_starting_stopping > 0
278		    ? SMF_AT_NEXT_BOOT : 0) != 0)
279			die(gettext("cannot disable service: %s\n"),
280			    scf_strerror(scf_error()));
281	}
282
283	if (enable > 0) {
284		if (smf_enable_instance(RCAP_FMRI, no_starting_stopping > 0
285		    ? SMF_AT_NEXT_BOOT : 0) != 0)
286			die(gettext("cannot enable service: %s\n"),
287			    scf_strerror(scf_error()));
288	}
289
290	if (rcfg_read(&conf, NULL) != E_SUCCESS) {
291		/*
292		 * If instance is enabled, put it in maintenance since we
293		 * failed to read configuration from the repository or
294		 * create statistics file.
295		 */
296		if (strcmp(smf_get_state(RCAP_FMRI),
297		    SCF_STATE_STRING_DISABLED) != 0)
298			(void) smf_maintain_instance(RCAP_FMRI, 0);
299
300		die(gettext("resource caps not configured\n"));
301	} else {
302		/* Done reading configuration */
303		if (strcmp(conf.rcfg_mode_name, "project") != 0) {
304			warn(gettext("%s mode specification ignored -- using"
305			    " project mode\n"), conf.rcfg_mode_name);
306			conf.rcfg_mode_name = "project";
307			conf.rcfg_mode = rctype_project;
308		}
309	}
310
311	if (refresh)
312		return (update_zone_mcap(zonename, maxrss));
313
314	if (modified) {
315		if (pressure >= 0)
316			conf.rcfg_memory_cap_enforcement_pressure = pressure;
317		if (config_interval >= 0)
318			conf.rcfg_reconfiguration_interval = config_interval;
319		if (scan_interval >= 0)
320			conf.rcfg_proc_walk_interval = scan_interval;
321		if (report_interval >= 0)
322			conf.rcfg_report_interval = report_interval;
323		if (sample_interval >= 0)
324			conf.rcfg_rss_sample_interval = sample_interval;
325
326		/*
327		 * Modify configuration with the new parameter(s). The
328		 * function will exit if it fails.
329		 */
330		if ((modify_config(&conf)) != 0)
331			die(gettext("Error updating repository \n"));
332
333		if (smf_refresh_instance(RCAP_FMRI) != 0)
334			die(gettext("cannot refresh service: %s\n"),
335			    scf_strerror(scf_error()));
336	}
337
338	/*
339	 * Display current configuration
340	 */
341	print_state();
342	return (E_SUCCESS);
343}
344