src/core/scope.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <errno.h>
   4 #include <unistd.h>
   5
   6 #include "alloc-util.h"
   7 #include "dbus-scope.h"
   8 #include "dbus-unit.h"
   9 #include "load-dropin.h"
  10 #include "log.h"
  11 #include "process-util.h"
  12 #include "random-util.h"
  13 #include "scope.h"
  14 #include "serialize.h"
  15 #include "special.h"
  16 #include "string-table.h"
  17 #include "string-util.h"
  18 #include "strv.h"
  19 #include "unit-name.h"
  20 #include "unit.h"
  21
  22 static const UnitActiveState state_translation_table[_SCOPE_STATE_MAX] = {
  23         [SCOPE_DEAD] = UNIT_INACTIVE,
  24         [SCOPE_RUNNING] = UNIT_ACTIVE,
  25         [SCOPE_ABANDONED] = UNIT_ACTIVE,
  26         [SCOPE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  27         [SCOPE_STOP_SIGKILL] = UNIT_DEACTIVATING,
  28         [SCOPE_FAILED] = UNIT_FAILED
  29 };
  30
  31 static int scope_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
  32
  33 static void scope_init(Unit *u) {
  34         Scope *s = SCOPE(u);
  35
  36         assert(u);
  37         assert(u->load_state == UNIT_STUB);
  38
  39         s->runtime_max_usec = USEC_INFINITY;
  40         s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
  41         u->ignore_on_isolate = true;
  42 }
  43
  44 static void scope_done(Unit *u) {
  45         Scope *s = SCOPE(u);
  46
  47         assert(u);
  48
  49         s->controller = mfree(s->controller);
  50         s->controller_track = sd_bus_track_unref(s->controller_track);
  51
  52         s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source);
  53 }
  54
  55 static usec_t scope_running_timeout(Scope *s) {
  56         usec_t delta = 0;
  57
  58         assert(s);
  59
  60         if (s->runtime_rand_extra_usec != 0) {
  61                 delta = random_u64_range(s->runtime_rand_extra_usec);
  62                 log_unit_debug(UNIT(s), "Adding delta of %s sec to timeout", FORMAT_TIMESPAN(delta, USEC_PER_SEC));
  63         }
  64
  65         return usec_add(usec_add(UNIT(s)->active_enter_timestamp.monotonic,
  66                                  s->runtime_max_usec),
  67                         delta);
  68 }
  69
  70 static int scope_arm_timer(Scope *s, usec_t usec) {
  71         int r;
  72
  73         assert(s);
  74
  75         if (s->timer_event_source) {
  76                 r = sd_event_source_set_time(s->timer_event_source, usec);
  77                 if (r < 0)
  78                         return r;
  79
  80                 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
  81         }
  82
  83         if (usec == USEC_INFINITY)
  84                 return 0;
  85
  86         r = sd_event_add_time(
  87                         UNIT(s)->manager->event,
  88                         &s->timer_event_source,
  89                         CLOCK_MONOTONIC,
  90                         usec, 0,
  91                         scope_dispatch_timer, s);
  92         if (r < 0)
  93                 return r;
  94
  95         (void) sd_event_source_set_description(s->timer_event_source, "scope-timer");
  96
  97         return 0;
  98 }
  99
 100 static void scope_set_state(Scope *s, ScopeState state) {
 101         ScopeState old_state;
 102         assert(s);
 103
 104         if (s->state != state)
 105                 bus_unit_send_pending_change_signal(UNIT(s), false);
 106
 107         old_state = s->state;
 108         s->state = state;
 109
 110         if (!IN_SET(state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL))
 111                 s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source);
 112
 113         if (IN_SET(state, SCOPE_DEAD, SCOPE_FAILED)) {
 114                 unit_unwatch_all_pids(UNIT(s));
 115                 unit_dequeue_rewatch_pids(UNIT(s));
 116         }
 117
 118         if (state != old_state)
 119                 log_debug("%s changed %s -> %s", UNIT(s)->id, scope_state_to_string(old_state), scope_state_to_string(state));
 120
 121         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], 0);
 122 }
 123
 124 static int scope_add_default_dependencies(Scope *s) {
 125         int r;
 126
 127         assert(s);
 128
 129         if (!UNIT(s)->default_dependencies)
 130                 return 0;
 131
 132         /* Make sure scopes are unloaded on shutdown */
 133         r = unit_add_two_dependencies_by_name(
 134                         UNIT(s),
 135                         UNIT_BEFORE, UNIT_CONFLICTS,
 136                         SPECIAL_SHUTDOWN_TARGET, true,
 137                         UNIT_DEPENDENCY_DEFAULT);
 138         if (r < 0)
 139                 return r;
 140
 141         return 0;
 142 }
 143
 144 static int scope_verify(Scope *s) {
 145         assert(s);
 146         assert(UNIT(s)->load_state == UNIT_LOADED);
 147
 148         if (set_isempty(UNIT(s)->pids) &&
 149             !MANAGER_IS_RELOADING(UNIT(s)->manager) &&
 150             !unit_has_name(UNIT(s), SPECIAL_INIT_SCOPE))
 151                 return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOENT), "Scope has no PIDs. Refusing.");
 152
 153         return 0;
 154 }
 155
 156 static int scope_load_init_scope(Unit *u) {
 157         assert(u);
 158
 159         if (!unit_has_name(u, SPECIAL_INIT_SCOPE))
 160                 return 0;
 161
 162         u->transient = true;
 163         u->perpetual = true;
 164
 165         /* init.scope is a bit special, as it has to stick around forever. Because of its special semantics we
 166          * synthesize it here, instead of relying on the unit file on disk. */
 167
 168         u->default_dependencies = false;
 169
 170         /* Prettify things, if we can. */
 171         if (!u->description)
 172                 u->description = strdup("System and Service Manager");
 173         if (!u->documentation)
 174                 (void) strv_extend(&u->documentation, "man:systemd(1)");
 175
 176         return 1;
 177 }
 178
 179 static int scope_add_extras(Scope *s) {
 180         int r;
 181
 182         r = unit_patch_contexts(UNIT(s));
 183         if (r < 0)
 184                 return r;
 185
 186         r = unit_set_default_slice(UNIT(s));
 187         if (r < 0)
 188                 return r;
 189
 190         return scope_add_default_dependencies(s);
 191 }
 192
 193 static int scope_load(Unit *u) {
 194         Scope *s = SCOPE(u);
 195         int r;
 196
 197         assert(s);
 198         assert(u->load_state == UNIT_STUB);
 199
 200         if (!u->transient && !MANAGER_IS_RELOADING(u->manager))
 201                 /* Refuse to load non-transient scope units, but allow them while reloading. */
 202                 return -ENOENT;
 203
 204         r = scope_load_init_scope(u);
 205         if (r < 0)
 206                 return r;
 207
 208         r = unit_load_fragment_and_dropin(u, false);
 209         if (r < 0)
 210                 return r;
 211
 212         if (u->load_state != UNIT_LOADED)
 213                 return 0;
 214
 215         r = scope_add_extras(s);
 216         if (r < 0)
 217                 return r;
 218
 219         return scope_verify(s);
 220 }
 221
 222 static usec_t scope_coldplug_timeout(Scope *s) {
 223         assert(s);
 224
 225         switch (s->deserialized_state) {
 226
 227         case SCOPE_RUNNING:
 228                 return scope_running_timeout(s);
 229
 230         case SCOPE_STOP_SIGKILL:
 231         case SCOPE_STOP_SIGTERM:
 232                 return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_stop_usec);
 233
 234         default:
 235                 return USEC_INFINITY;
 236         }
 237 }
 238
 239 static int scope_coldplug(Unit *u) {
 240         Scope *s = SCOPE(u);
 241         int r;
 242
 243         assert(s);
 244         assert(s->state == SCOPE_DEAD);
 245
 246         if (s->deserialized_state == s->state)
 247                 return 0;
 248
 249         r = scope_arm_timer(s, scope_coldplug_timeout(s));
 250         if (r < 0)
 251                 return r;
 252
 253         if (!IN_SET(s->deserialized_state, SCOPE_DEAD, SCOPE_FAILED)) {
 254                 if (u->pids) {
 255                         void *pidp;
 256
 257                         SET_FOREACH(pidp, u->pids) {
 258                                 r = unit_watch_pid(u, PTR_TO_PID(pidp), false);
 259                                 if (r < 0 && r != -EEXIST)
 260                                         return r;
 261                         }
 262                 } else
 263                         (void) unit_enqueue_rewatch_pids(u);
 264         }
 265
 266         bus_scope_track_controller(s);
 267
 268         scope_set_state(s, s->deserialized_state);
 269         return 0;
 270 }
 271
 272 static void scope_dump(Unit *u, FILE *f, const char *prefix) {
 273         Scope *s = SCOPE(u);
 274
 275         assert(s);
 276         assert(f);
 277
 278         fprintf(f,
 279                 "%sScope State: %s\n"
 280                 "%sResult: %s\n"
 281                 "%sRuntimeMaxSec: %s\n"
 282                 "%sRuntimeRandomizedExtraSec: %s\n",
 283                 prefix, scope_state_to_string(s->state),
 284                 prefix, scope_result_to_string(s->result),
 285                 prefix, FORMAT_TIMESPAN(s->runtime_max_usec, USEC_PER_SEC),
 286                 prefix, FORMAT_TIMESPAN(s->runtime_rand_extra_usec, USEC_PER_SEC));
 287
 288         cgroup_context_dump(UNIT(s), f, prefix);
 289         kill_context_dump(&s->kill_context, f, prefix);
 290 }
 291
 292 static void scope_enter_dead(Scope *s, ScopeResult f) {
 293         assert(s);
 294
 295         if (s->result == SCOPE_SUCCESS)
 296                 s->result = f;
 297
 298         unit_log_result(UNIT(s), s->result == SCOPE_SUCCESS, scope_result_to_string(s->result));
 299         scope_set_state(s, s->result != SCOPE_SUCCESS ? SCOPE_FAILED : SCOPE_DEAD);
 300 }
 301
 302 static void scope_enter_signal(Scope *s, ScopeState state, ScopeResult f) {
 303         bool skip_signal = false;
 304         int r;
 305
 306         assert(s);
 307
 308         if (s->result == SCOPE_SUCCESS)
 309                 s->result = f;
 310
 311         /* Before sending any signal, make sure we track all members of this cgroup */
 312         (void) unit_watch_all_pids(UNIT(s));
 313
 314         /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
 315          * died now */
 316         (void) unit_enqueue_rewatch_pids(UNIT(s));
 317
 318         /* If we have a controller set let's ask the controller nicely to terminate the scope, instead of us going
 319          * directly into SIGTERM berserk mode */
 320         if (state == SCOPE_STOP_SIGTERM)
 321                 skip_signal = bus_scope_send_request_stop(s) > 0;
 322
 323         if (skip_signal)
 324                 r = 1; /* wait */
 325         else {
 326                 r = unit_kill_context(
 327                                 UNIT(s),
 328                                 &s->kill_context,
 329                                 state != SCOPE_STOP_SIGTERM ? KILL_KILL :
 330                                 s->was_abandoned            ? KILL_TERMINATE_AND_LOG :
 331                                                               KILL_TERMINATE,
 332                                 -1, -1, false);
 333                 if (r < 0)
 334                         goto fail;
 335         }
 336
 337         if (r > 0) {
 338                 r = scope_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
 339                 if (r < 0)
 340                         goto fail;
 341
 342                 scope_set_state(s, state);
 343         } else if (state == SCOPE_STOP_SIGTERM)
 344                 scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_SUCCESS);
 345         else
 346                 scope_enter_dead(s, SCOPE_SUCCESS);
 347
 348         return;
 349
 350 fail:
 351         log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
 352
 353         scope_enter_dead(s, SCOPE_FAILURE_RESOURCES);
 354 }
 355
 356 static int scope_start(Unit *u) {
 357         Scope *s = SCOPE(u);
 358         int r;
 359
 360         assert(s);
 361
 362         if (unit_has_name(u, SPECIAL_INIT_SCOPE))
 363                 return -EPERM;
 364
 365         if (s->state == SCOPE_FAILED)
 366                 return -EPERM;
 367
 368         /* We can't fulfill this right now, please try again later */
 369         if (IN_SET(s->state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL))
 370                 return -EAGAIN;
 371
 372         assert(s->state == SCOPE_DEAD);
 373
 374         if (!u->transient && !MANAGER_IS_RELOADING(u->manager))
 375                 return -ENOENT;
 376
 377         (void) bus_scope_track_controller(s);
 378
 379         r = unit_acquire_invocation_id(u);
 380         if (r < 0)
 381                 return r;
 382
 383         (void) unit_realize_cgroup(u);
 384         (void) unit_reset_accounting(u);
 385
 386         unit_export_state_files(u);
 387
 388         r = unit_attach_pids_to_cgroup(u, u->pids, NULL);
 389         if (r < 0) {
 390                 log_unit_warning_errno(u, r, "Failed to add PIDs to scope's control group: %m");
 391                 scope_enter_dead(s, SCOPE_FAILURE_RESOURCES);
 392                 return r;
 393         }
 394
 395         s->result = SCOPE_SUCCESS;
 396
 397         scope_set_state(s, SCOPE_RUNNING);
 398
 399         /* Set the maximum runtime timeout. */
 400         scope_arm_timer(s, scope_running_timeout(s));
 401
 402         /* On unified we use proper notifications hence we can unwatch the PIDs
 403          * we just attached to the scope. This can also be done on legacy as
 404          * we're going to update the list of the processes we watch with the
 405          * PIDs currently in the scope anyway. */
 406         unit_unwatch_all_pids(u);
 407
 408         /* Start watching the PIDs currently in the scope (legacy hierarchy only) */
 409         (void) unit_enqueue_rewatch_pids(u);
 410         return 1;
 411 }
 412
 413 static int scope_stop(Unit *u) {
 414         Scope *s = SCOPE(u);
 415
 416         assert(s);
 417
 418         if (IN_SET(s->state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL))
 419                 return 0;
 420
 421         assert(IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED));
 422
 423         scope_enter_signal(s, SCOPE_STOP_SIGTERM, SCOPE_SUCCESS);
 424         return 1;
 425 }
 426
 427 static void scope_reset_failed(Unit *u) {
 428         Scope *s = SCOPE(u);
 429
 430         assert(s);
 431
 432         if (s->state == SCOPE_FAILED)
 433                 scope_set_state(s, SCOPE_DEAD);
 434
 435         s->result = SCOPE_SUCCESS;
 436 }
 437
 438 static int scope_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
 439         return unit_kill_common(u, who, signo, -1, -1, error);
 440 }
 441
 442 static int scope_get_timeout(Unit *u, usec_t *timeout) {
 443         Scope *s = SCOPE(u);
 444         usec_t t;
 445         int r;
 446
 447         if (!s->timer_event_source)
 448                 return 0;
 449
 450         r = sd_event_source_get_time(s->timer_event_source, &t);
 451         if (r < 0)
 452                 return r;
 453         if (t == USEC_INFINITY)
 454                 return 0;
 455
 456         *timeout = t;
 457         return 1;
 458 }
 459
 460 static int scope_serialize(Unit *u, FILE *f, FDSet *fds) {
 461         Scope *s = SCOPE(u);
 462         void *pidp;
 463
 464         assert(s);
 465         assert(f);
 466         assert(fds);
 467
 468         (void) serialize_item(f, "state", scope_state_to_string(s->state));
 469         (void) serialize_bool(f, "was-abandoned", s->was_abandoned);
 470
 471         if (s->controller)
 472                 (void) serialize_item(f, "controller", s->controller);
 473
 474         SET_FOREACH(pidp, u->pids)
 475                 serialize_item_format(f, "pids", PID_FMT, PTR_TO_PID(pidp));
 476
 477         return 0;
 478 }
 479
 480 static int scope_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
 481         Scope *s = SCOPE(u);
 482         int r;
 483
 484         assert(u);
 485         assert(key);
 486         assert(value);
 487         assert(fds);
 488
 489         if (streq(key, "state")) {
 490                 ScopeState state;
 491
 492                 state = scope_state_from_string(value);
 493                 if (state < 0)
 494                         log_unit_debug(u, "Failed to parse state value: %s", value);
 495                 else
 496                         s->deserialized_state = state;
 497
 498         } else if (streq(key, "was-abandoned")) {
 499                 int k;
 500
 501                 k = parse_boolean(value);
 502                 if (k < 0)
 503                         log_unit_debug(u, "Failed to parse boolean value: %s", value);
 504                 else
 505                         s->was_abandoned = k;
 506         } else if (streq(key, "controller")) {
 507
 508                 r = free_and_strdup(&s->controller, value);
 509                 if (r < 0)
 510                         return log_oom();
 511
 512         } else if (streq(key, "pids")) {
 513                 pid_t pid;
 514
 515                 if (parse_pid(value, &pid) < 0)
 516                         log_unit_debug(u, "Failed to parse pids value: %s", value);
 517                 else {
 518                         r = set_ensure_put(&u->pids, NULL, PID_TO_PTR(pid));
 519                         if (r < 0)
 520                                 return r;
 521                 }
 522         } else
 523                 log_unit_debug(u, "Unknown serialization key: %s", key);
 524
 525         return 0;
 526 }
 527
 528 static void scope_notify_cgroup_empty_event(Unit *u) {
 529         Scope *s = SCOPE(u);
 530         assert(u);
 531
 532         log_unit_debug(u, "cgroup is empty");
 533
 534         if (IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL))
 535                 scope_enter_dead(s, SCOPE_SUCCESS);
 536
 537         /* If the cgroup empty notification comes when the unit is not active, we must have failed to clean
 538          * up the cgroup earlier and should do it now. */
 539         if (IN_SET(s->state, SCOPE_DEAD, SCOPE_FAILED))
 540                 unit_prune_cgroup(u);
 541 }
 542
 543 static void scope_sigchld_event(Unit *u, pid_t pid, int code, int status) {
 544         assert(u);
 545
 546         /* If we get a SIGCHLD event for one of the processes we were interested in, then we look for others to
 547          * watch, under the assumption that we'll sooner or later get a SIGCHLD for them, as the original
 548          * process we watched was probably the parent of them, and they are hence now our children. */
 549
 550         (void) unit_enqueue_rewatch_pids(u);
 551 }
 552
 553 static int scope_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
 554         Scope *s = SCOPE(userdata);
 555
 556         assert(s);
 557         assert(s->timer_event_source == source);
 558
 559         switch (s->state) {
 560
 561         case SCOPE_RUNNING:
 562                 log_unit_warning(UNIT(s), "Scope reached runtime time limit. Stopping.");
 563                 scope_enter_signal(s, SCOPE_STOP_SIGTERM, SCOPE_FAILURE_TIMEOUT);
 564                 break;
 565
 566         case SCOPE_STOP_SIGTERM:
 567                 if (s->kill_context.send_sigkill) {
 568                         log_unit_warning(UNIT(s), "Stopping timed out. Killing.");
 569                         scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_FAILURE_TIMEOUT);
 570                 } else {
 571                         log_unit_warning(UNIT(s), "Stopping timed out. Skipping SIGKILL.");
 572                         scope_enter_dead(s, SCOPE_FAILURE_TIMEOUT);
 573                 }
 574
 575                 break;
 576
 577         case SCOPE_STOP_SIGKILL:
 578                 log_unit_warning(UNIT(s), "Still around after SIGKILL. Ignoring.");
 579                 scope_enter_dead(s, SCOPE_FAILURE_TIMEOUT);
 580                 break;
 581
 582         default:
 583                 assert_not_reached();
 584         }
 585
 586         return 0;
 587 }
 588
 589 int scope_abandon(Scope *s) {
 590         assert(s);
 591
 592         if (unit_has_name(UNIT(s), SPECIAL_INIT_SCOPE))
 593                 return -EPERM;
 594
 595         if (!IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED))
 596                 return -ESTALE;
 597
 598         s->was_abandoned = true;
 599
 600         s->controller = mfree(s->controller);
 601         s->controller_track = sd_bus_track_unref(s->controller_track);
 602
 603         scope_set_state(s, SCOPE_ABANDONED);
 604
 605         /* The client is no longer watching the remaining processes, so let's step in here, under the assumption that
 606          * the remaining processes will be sooner or later reassigned to us as parent. */
 607         (void) unit_enqueue_rewatch_pids(UNIT(s));
 608
 609         return 0;
 610 }
 611
 612 _pure_ static UnitActiveState scope_active_state(Unit *u) {
 613         assert(u);
 614
 615         return state_translation_table[SCOPE(u)->state];
 616 }
 617
 618 _pure_ static const char *scope_sub_state_to_string(Unit *u) {
 619         assert(u);
 620
 621         return scope_state_to_string(SCOPE(u)->state);
 622 }
 623
 624 static void scope_enumerate_perpetual(Manager *m) {
 625         Unit *u;
 626         int r;
 627
 628         assert(m);
 629
 630         /* Let's unconditionally add the "init.scope" special unit
 631          * that encapsulates PID 1. Note that PID 1 already is in the
 632          * cgroup for this, we hence just need to allocate the object
 633          * for it and that's it. */
 634
 635         u = manager_get_unit(m, SPECIAL_INIT_SCOPE);
 636         if (!u) {
 637                 r = unit_new_for_name(m, sizeof(Scope), SPECIAL_INIT_SCOPE, &u);
 638                 if (r < 0)  {
 639                         log_error_errno(r, "Failed to allocate the special " SPECIAL_INIT_SCOPE " unit: %m");
 640                         return;
 641                 }
 642         }
 643
 644         u->transient = true;
 645         u->perpetual = true;
 646         SCOPE(u)->deserialized_state = SCOPE_RUNNING;
 647
 648         unit_add_to_load_queue(u);
 649         unit_add_to_dbus_queue(u);
 650 }
 651
 652 static const char* const scope_result_table[_SCOPE_RESULT_MAX] = {
 653         [SCOPE_SUCCESS]           = "success",
 654         [SCOPE_FAILURE_RESOURCES] = "resources",
 655         [SCOPE_FAILURE_TIMEOUT]   = "timeout",
 656 };
 657
 658 DEFINE_STRING_TABLE_LOOKUP(scope_result, ScopeResult);
 659
 660 const UnitVTable scope_vtable = {
 661         .object_size = sizeof(Scope),
 662         .cgroup_context_offset = offsetof(Scope, cgroup_context),
 663         .kill_context_offset = offsetof(Scope, kill_context),
 664
 665         .sections =
 666                 "Unit\0"
 667                 "Scope\0"
 668                 "Install\0",
 669         .private_section = "Scope",
 670
 671         .can_transient = true,
 672         .can_delegate = true,
 673         .can_fail = true,
 674         .once_only = true,
 675         .can_set_managed_oom = true,
 676
 677         .init = scope_init,
 678         .load = scope_load,
 679         .done = scope_done,
 680
 681         .coldplug = scope_coldplug,
 682
 683         .dump = scope_dump,
 684
 685         .start = scope_start,
 686         .stop = scope_stop,
 687
 688         .kill = scope_kill,
 689
 690         .freeze = unit_freeze_vtable_common,
 691         .thaw = unit_thaw_vtable_common,
 692
 693         .get_timeout = scope_get_timeout,
 694
 695         .serialize = scope_serialize,
 696         .deserialize_item = scope_deserialize_item,
 697
 698         .active_state = scope_active_state,
 699         .sub_state_to_string = scope_sub_state_to_string,
 700
 701         .sigchld_event = scope_sigchld_event,
 702
 703         .reset_failed = scope_reset_failed,
 704
 705         .notify_cgroup_empty = scope_notify_cgroup_empty_event,
 706
 707         .bus_set_property = bus_scope_set_property,
 708         .bus_commit_properties = bus_scope_commit_properties,
 709
 710         .enumerate_perpetual = scope_enumerate_perpetual,
 711 };