usr/src/cmd/rcap/rcapadm/rcapadm.c

   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 }