src/core/path.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <sys/inotify.h>
  23 #include <sys/epoll.h>
  24 #include <sys/ioctl.h>
  25 #include <errno.h>
  26 #include <unistd.h>
  27
  28 #include "unit.h"
  29 #include "unit-name.h"
  30 #include "path.h"
  31 #include "mkdir.h"
  32 #include "dbus-path.h"
  33 #include "special.h"
  34 #include "path-util.h"
  35 #include "macro.h"
  36 #include "bus-util.h"
  37 #include "bus-error.h"
  38
  39 static const UnitActiveState state_translation_table[_PATH_STATE_MAX] = {
  40         [PATH_DEAD] = UNIT_INACTIVE,
  41         [PATH_WAITING] = UNIT_ACTIVE,
  42         [PATH_RUNNING] = UNIT_ACTIVE,
  43         [PATH_FAILED] = UNIT_FAILED
  44 };
  45
  46 static int path_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata);
  47
  48 int path_spec_watch(PathSpec *s, sd_event_io_handler_t handler) {
  49
  50         static const int flags_table[_PATH_TYPE_MAX] = {
  51                 [PATH_EXISTS] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB,
  52                 [PATH_EXISTS_GLOB] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB,
  53                 [PATH_CHANGED] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB|IN_CLOSE_WRITE|IN_CREATE|IN_DELETE|IN_MOVED_FROM|IN_MOVED_TO,
  54                 [PATH_MODIFIED] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB|IN_CLOSE_WRITE|IN_CREATE|IN_DELETE|IN_MOVED_FROM|IN_MOVED_TO|IN_MODIFY,
  55                 [PATH_DIRECTORY_NOT_EMPTY] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB|IN_CREATE|IN_MOVED_TO
  56         };
  57
  58         bool exists = false;
  59         char *slash, *oldslash = NULL;
  60         int r;
  61
  62         assert(s);
  63         assert(s->unit);
  64         assert(handler);
  65
  66         path_spec_unwatch(s);
  67
  68         s->inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
  69         if (s->inotify_fd < 0) {
  70                 r = -errno;
  71                 goto fail;
  72         }
  73
  74         r = sd_event_add_io(s->unit->manager->event, &s->event_source, s->inotify_fd, EPOLLIN, handler, s);
  75         if (r < 0)
  76                 goto fail;
  77
  78         /* This assumes the path was passed through path_kill_slashes()! */
  79
  80         for (slash = strchr(s->path, '/'); ; slash = strchr(slash+1, '/')) {
  81                 char *cut = NULL;
  82                 int flags;
  83                 char tmp;
  84
  85                 if (slash) {
  86                         cut = slash + (slash == s->path);
  87                         tmp = *cut;
  88                         *cut = '\0';
  89
  90                         flags = IN_MOVE_SELF | IN_DELETE_SELF | IN_ATTRIB | IN_CREATE | IN_MOVED_TO;
  91                 } else
  92                         flags = flags_table[s->type];
  93
  94                 r = inotify_add_watch(s->inotify_fd, s->path, flags);
  95                 if (r < 0) {
  96                         if (errno == EACCES || errno == ENOENT) {
  97                                 if (cut)
  98                                         *cut = tmp;
  99                                 break;
 100                         }
 101
 102                         log_warning("Failed to add watch on %s: %s", s->path,
 103                                     errno == ENOSPC ? "too many watches" : strerror(-r));
 104                         r = -errno;
 105                         if (cut)
 106                                 *cut = tmp;
 107                         goto fail;
 108                 } else {
 109                         exists = true;
 110
 111                         /* Path exists, we don't need to watch parent
 112                            too closely. */
 113                         if (oldslash) {
 114                                 char *cut2 = oldslash + (oldslash == s->path);
 115                                 char tmp2 = *cut2;
 116                                 *cut2 = '\0';
 117
 118                                 inotify_add_watch(s->inotify_fd, s->path, IN_MOVE_SELF);
 119                                 /* Error is ignored, the worst can happen is
 120                                    we get spurious events. */
 121
 122                                 *cut2 = tmp2;
 123                         }
 124                 }
 125
 126                 if (cut)
 127                         *cut = tmp;
 128
 129                 if (slash)
 130                         oldslash = slash;
 131                 else {
 132                         /* whole path has been iterated over */
 133                         s->primary_wd = r;
 134                         break;
 135                 }
 136         }
 137
 138         if (!exists) {
 139                 log_error_errno(errno, "Failed to add watch on any of the components of %s: %m",
 140                           s->path);
 141                 r = -errno; /* either EACCESS or ENOENT */
 142                 goto fail;
 143         }
 144
 145         return 0;
 146
 147 fail:
 148         path_spec_unwatch(s);
 149         return r;
 150 }
 151
 152 void path_spec_unwatch(PathSpec *s) {
 153         assert(s);
 154
 155         s->event_source = sd_event_source_unref(s->event_source);
 156         s->inotify_fd = safe_close(s->inotify_fd);
 157 }
 158
 159 int path_spec_fd_event(PathSpec *s, uint32_t revents) {
 160         union inotify_event_buffer buffer;
 161         struct inotify_event *e;
 162         ssize_t l;
 163         int r = 0;
 164
 165         if (revents != EPOLLIN) {
 166                 log_error("Got invalid poll event on inotify.");
 167                 return -EINVAL;
 168         }
 169
 170         l = read(s->inotify_fd, &buffer, sizeof(buffer));
 171         if (l < 0) {
 172                 if (errno == EAGAIN || errno == EINTR)
 173                         return 0;
 174
 175                 return log_error_errno(errno, "Failed to read inotify event: %m");
 176         }
 177
 178         FOREACH_INOTIFY_EVENT(e, buffer, l) {
 179                 if ((s->type == PATH_CHANGED || s->type == PATH_MODIFIED) &&
 180                     s->primary_wd == e->wd)
 181                         r = 1;
 182         }
 183
 184         return r;
 185 }
 186
 187 static bool path_spec_check_good(PathSpec *s, bool initial) {
 188         bool good = false;
 189
 190         switch (s->type) {
 191
 192         case PATH_EXISTS:
 193                 good = access(s->path, F_OK) >= 0;
 194                 break;
 195
 196         case PATH_EXISTS_GLOB:
 197                 good = glob_exists(s->path) > 0;
 198                 break;
 199
 200         case PATH_DIRECTORY_NOT_EMPTY: {
 201                 int k;
 202
 203                 k = dir_is_empty(s->path);
 204                 good = !(k == -ENOENT || k > 0);
 205                 break;
 206         }
 207
 208         case PATH_CHANGED:
 209         case PATH_MODIFIED: {
 210                 bool b;
 211
 212                 b = access(s->path, F_OK) >= 0;
 213                 good = !initial && b != s->previous_exists;
 214                 s->previous_exists = b;
 215                 break;
 216         }
 217
 218         default:
 219                 ;
 220         }
 221
 222         return good;
 223 }
 224
 225 static void path_spec_mkdir(PathSpec *s, mode_t mode) {
 226         int r;
 227
 228         if (s->type == PATH_EXISTS || s->type == PATH_EXISTS_GLOB)
 229                 return;
 230
 231         r = mkdir_p_label(s->path, mode);
 232         if (r < 0)
 233                 log_warning_errno(r, "mkdir(%s) failed: %m", s->path);
 234 }
 235
 236 static void path_spec_dump(PathSpec *s, FILE *f, const char *prefix) {
 237         fprintf(f,
 238                 "%s%s: %s\n",
 239                 prefix,
 240                 path_type_to_string(s->type),
 241                 s->path);
 242 }
 243
 244 void path_spec_done(PathSpec *s) {
 245         assert(s);
 246         assert(s->inotify_fd == -1);
 247
 248         free(s->path);
 249 }
 250
 251 static void path_init(Unit *u) {
 252         Path *p = PATH(u);
 253
 254         assert(u);
 255         assert(u->load_state == UNIT_STUB);
 256
 257         p->directory_mode = 0755;
 258 }
 259
 260 void path_free_specs(Path *p) {
 261         PathSpec *s;
 262
 263         assert(p);
 264
 265         while ((s = p->specs)) {
 266                 path_spec_unwatch(s);
 267                 LIST_REMOVE(spec, p->specs, s);
 268                 path_spec_done(s);
 269                 free(s);
 270         }
 271 }
 272
 273 static void path_done(Unit *u) {
 274         Path *p = PATH(u);
 275
 276         assert(p);
 277
 278         path_free_specs(p);
 279 }
 280
 281 static int path_add_mount_links(Path *p) {
 282         PathSpec *s;
 283         int r;
 284
 285         assert(p);
 286
 287         LIST_FOREACH(spec, s, p->specs) {
 288                 r = unit_require_mounts_for(UNIT(p), s->path);
 289                 if (r < 0)
 290                         return r;
 291         }
 292
 293         return 0;
 294 }
 295
 296 static int path_verify(Path *p) {
 297         assert(p);
 298
 299         if (UNIT(p)->load_state != UNIT_LOADED)
 300                 return 0;
 301
 302         if (!p->specs) {
 303                 log_unit_error(UNIT(p)->id,
 304                                "%s lacks path setting. Refusing.", UNIT(p)->id);
 305                 return -EINVAL;
 306         }
 307
 308         return 0;
 309 }
 310
 311 static int path_add_default_dependencies(Path *p) {
 312         int r;
 313
 314         assert(p);
 315
 316         r = unit_add_dependency_by_name(UNIT(p), UNIT_BEFORE,
 317                                         SPECIAL_PATHS_TARGET, NULL, true);
 318         if (r < 0)
 319                 return r;
 320
 321         if (UNIT(p)->manager->running_as == SYSTEMD_SYSTEM) {
 322                 r = unit_add_two_dependencies_by_name(UNIT(p), UNIT_AFTER, UNIT_REQUIRES,
 323                                                       SPECIAL_SYSINIT_TARGET, NULL, true);
 324                 if (r < 0)
 325                         return r;
 326         }
 327
 328         return unit_add_two_dependencies_by_name(UNIT(p), UNIT_BEFORE, UNIT_CONFLICTS,
 329                                                  SPECIAL_SHUTDOWN_TARGET, NULL, true);
 330 }
 331
 332 static int path_load(Unit *u) {
 333         Path *p = PATH(u);
 334         int r;
 335
 336         assert(u);
 337         assert(u->load_state == UNIT_STUB);
 338
 339         r = unit_load_fragment_and_dropin(u);
 340         if (r < 0)
 341                 return r;
 342
 343         if (u->load_state == UNIT_LOADED) {
 344
 345                 if (set_isempty(u->dependencies[UNIT_TRIGGERS])) {
 346                         Unit *x;
 347
 348                         r = unit_load_related_unit(u, ".service", &x);
 349                         if (r < 0)
 350                                 return r;
 351
 352                         r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, x, true);
 353                         if (r < 0)
 354                                 return r;
 355                 }
 356
 357                 r = path_add_mount_links(p);
 358                 if (r < 0)
 359                         return r;
 360
 361                 if (UNIT(p)->default_dependencies) {
 362                         r = path_add_default_dependencies(p);
 363                         if (r < 0)
 364                                 return r;
 365                 }
 366         }
 367
 368         return path_verify(p);
 369 }
 370
 371 static void path_dump(Unit *u, FILE *f, const char *prefix) {
 372         Path *p = PATH(u);
 373         Unit *trigger;
 374         PathSpec *s;
 375
 376         assert(p);
 377         assert(f);
 378
 379         trigger = UNIT_TRIGGER(u);
 380
 381         fprintf(f,
 382                 "%sPath State: %s\n"
 383                 "%sResult: %s\n"
 384                 "%sUnit: %s\n"
 385                 "%sMakeDirectory: %s\n"
 386                 "%sDirectoryMode: %04o\n",
 387                 prefix, path_state_to_string(p->state),
 388                 prefix, path_result_to_string(p->result),
 389                 prefix, trigger ? trigger->id : "n/a",
 390                 prefix, yes_no(p->make_directory),
 391                 prefix, p->directory_mode);
 392
 393         LIST_FOREACH(spec, s, p->specs)
 394                 path_spec_dump(s, f, prefix);
 395 }
 396
 397 static void path_unwatch(Path *p) {
 398         PathSpec *s;
 399
 400         assert(p);
 401
 402         LIST_FOREACH(spec, s, p->specs)
 403                 path_spec_unwatch(s);
 404 }
 405
 406 static int path_watch(Path *p) {
 407         int r;
 408         PathSpec *s;
 409
 410         assert(p);
 411
 412         LIST_FOREACH(spec, s, p->specs) {
 413                 r = path_spec_watch(s, path_dispatch_io);
 414                 if (r < 0)
 415                         return r;
 416         }
 417
 418         return 0;
 419 }
 420
 421 static void path_set_state(Path *p, PathState state) {
 422         PathState old_state;
 423         assert(p);
 424
 425         old_state = p->state;
 426         p->state = state;
 427
 428         if (state != PATH_WAITING &&
 429             (state != PATH_RUNNING || p->inotify_triggered))
 430                 path_unwatch(p);
 431
 432         if (state != old_state)
 433                 log_debug("%s changed %s -> %s",
 434                           UNIT(p)->id,
 435                           path_state_to_string(old_state),
 436                           path_state_to_string(state));
 437
 438         unit_notify(UNIT(p), state_translation_table[old_state], state_translation_table[state], true);
 439 }
 440
 441 static void path_enter_waiting(Path *p, bool initial, bool recheck);
 442
 443 static int path_coldplug(Unit *u) {
 444         Path *p = PATH(u);
 445
 446         assert(p);
 447         assert(p->state == PATH_DEAD);
 448
 449         if (p->deserialized_state != p->state) {
 450
 451                 if (p->deserialized_state == PATH_WAITING ||
 452                     p->deserialized_state == PATH_RUNNING)
 453                         path_enter_waiting(p, true, true);
 454                 else
 455                         path_set_state(p, p->deserialized_state);
 456         }
 457
 458         return 0;
 459 }
 460
 461 static void path_enter_dead(Path *p, PathResult f) {
 462         assert(p);
 463
 464         if (f != PATH_SUCCESS)
 465                 p->result = f;
 466
 467         path_set_state(p, p->result != PATH_SUCCESS ? PATH_FAILED : PATH_DEAD);
 468 }
 469
 470 static void path_enter_running(Path *p) {
 471         _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
 472         int r;
 473
 474         assert(p);
 475
 476         /* Don't start job if we are supposed to go down */
 477         if (unit_stop_pending(UNIT(p)))
 478                 return;
 479
 480         r = manager_add_job(UNIT(p)->manager, JOB_START, UNIT_TRIGGER(UNIT(p)),
 481                             JOB_REPLACE, true, &error, NULL);
 482         if (r < 0)
 483                 goto fail;
 484
 485         p->inotify_triggered = false;
 486
 487         r = path_watch(p);
 488         if (r < 0)
 489                 goto fail;
 490
 491         path_set_state(p, PATH_RUNNING);
 492         return;
 493
 494 fail:
 495         log_warning("%s failed to queue unit startup job: %s",
 496                     UNIT(p)->id, bus_error_message(&error, r));
 497         path_enter_dead(p, PATH_FAILURE_RESOURCES);
 498 }
 499
 500 static bool path_check_good(Path *p, bool initial) {
 501         PathSpec *s;
 502         bool good = false;
 503
 504         assert(p);
 505
 506         LIST_FOREACH(spec, s, p->specs) {
 507                 good = path_spec_check_good(s, initial);
 508
 509                 if (good)
 510                         break;
 511         }
 512
 513         return good;
 514 }
 515
 516 static void path_enter_waiting(Path *p, bool initial, bool recheck) {
 517         int r;
 518
 519         if (recheck)
 520                 if (path_check_good(p, initial)) {
 521                         log_debug("%s got triggered.", UNIT(p)->id);
 522                         path_enter_running(p);
 523                         return;
 524                 }
 525
 526         r = path_watch(p);
 527         if (r < 0)
 528                 goto fail;
 529
 530         /* Hmm, so now we have created inotify watches, but the file
 531          * might have appeared/been removed by now, so we must
 532          * recheck */
 533
 534         if (recheck)
 535                 if (path_check_good(p, false)) {
 536                         log_debug("%s got triggered.", UNIT(p)->id);
 537                         path_enter_running(p);
 538                         return;
 539                 }
 540
 541         path_set_state(p, PATH_WAITING);
 542         return;
 543
 544 fail:
 545         log_warning_errno(r, "%s failed to enter waiting state: %m", UNIT(p)->id);
 546         path_enter_dead(p, PATH_FAILURE_RESOURCES);
 547 }
 548
 549 static void path_mkdir(Path *p) {
 550         PathSpec *s;
 551
 552         assert(p);
 553
 554         if (!p->make_directory)
 555                 return;
 556
 557         LIST_FOREACH(spec, s, p->specs)
 558                 path_spec_mkdir(s, p->directory_mode);
 559 }
 560
 561 static int path_start(Unit *u) {
 562         Path *p = PATH(u);
 563
 564         assert(p);
 565         assert(p->state == PATH_DEAD || p->state == PATH_FAILED);
 566
 567         if (UNIT_TRIGGER(u)->load_state != UNIT_LOADED)
 568                 return -ENOENT;
 569
 570         path_mkdir(p);
 571
 572         p->result = PATH_SUCCESS;
 573         path_enter_waiting(p, true, true);
 574
 575         return 0;
 576 }
 577
 578 static int path_stop(Unit *u) {
 579         Path *p = PATH(u);
 580
 581         assert(p);
 582         assert(p->state == PATH_WAITING || p->state == PATH_RUNNING);
 583
 584         path_enter_dead(p, PATH_SUCCESS);
 585         return 0;
 586 }
 587
 588 static int path_serialize(Unit *u, FILE *f, FDSet *fds) {
 589         Path *p = PATH(u);
 590
 591         assert(u);
 592         assert(f);
 593         assert(fds);
 594
 595         unit_serialize_item(u, f, "state", path_state_to_string(p->state));
 596         unit_serialize_item(u, f, "result", path_result_to_string(p->result));
 597
 598         return 0;
 599 }
 600
 601 static int path_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
 602         Path *p = PATH(u);
 603
 604         assert(u);
 605         assert(key);
 606         assert(value);
 607         assert(fds);
 608
 609         if (streq(key, "state")) {
 610                 PathState state;
 611
 612                 state = path_state_from_string(value);
 613                 if (state < 0)
 614                         log_debug("Failed to parse state value %s", value);
 615                 else
 616                         p->deserialized_state = state;
 617
 618         } else if (streq(key, "result")) {
 619                 PathResult f;
 620
 621                 f = path_result_from_string(value);
 622                 if (f < 0)
 623                         log_debug("Failed to parse result value %s", value);
 624                 else if (f != PATH_SUCCESS)
 625                         p->result = f;
 626
 627         } else
 628                 log_debug("Unknown serialization key '%s'", key);
 629
 630         return 0;
 631 }
 632
 633 _pure_ static UnitActiveState path_active_state(Unit *u) {
 634         assert(u);
 635
 636         return state_translation_table[PATH(u)->state];
 637 }
 638
 639 _pure_ static const char *path_sub_state_to_string(Unit *u) {
 640         assert(u);
 641
 642         return path_state_to_string(PATH(u)->state);
 643 }
 644
 645 static int path_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
 646         PathSpec *s = userdata;
 647         Path *p;
 648         int changed;
 649
 650         assert(s);
 651         assert(s->unit);
 652         assert(fd >= 0);
 653
 654         p = PATH(s->unit);
 655
 656         if (p->state != PATH_WAITING &&
 657             p->state != PATH_RUNNING)
 658                 return 0;
 659
 660         /* log_debug("inotify wakeup on %s.", u->id); */
 661
 662         LIST_FOREACH(spec, s, p->specs)
 663                 if (path_spec_owns_inotify_fd(s, fd))
 664                         break;
 665
 666         if (!s) {
 667                 log_error("Got event on unknown fd.");
 668                 goto fail;
 669         }
 670
 671         changed = path_spec_fd_event(s, revents);
 672         if (changed < 0)
 673                 goto fail;
 674
 675         /* If we are already running, then remember that one event was
 676          * dispatched so that we restart the service only if something
 677          * actually changed on disk */
 678         p->inotify_triggered = true;
 679
 680         if (changed)
 681                 path_enter_running(p);
 682         else
 683                 path_enter_waiting(p, false, true);
 684
 685         return 0;
 686
 687 fail:
 688         path_enter_dead(p, PATH_FAILURE_RESOURCES);
 689         return 0;
 690 }
 691
 692 static void path_trigger_notify(Unit *u, Unit *other) {
 693         Path *p = PATH(u);
 694
 695         assert(u);
 696         assert(other);
 697
 698         /* Invoked whenever the unit we trigger changes state or gains
 699          * or loses a job */
 700
 701         if (other->load_state != UNIT_LOADED)
 702                 return;
 703
 704         if (p->state == PATH_RUNNING &&
 705             UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) {
 706                 log_unit_debug(UNIT(p)->id,
 707                                "%s got notified about unit deactivation.",
 708                                UNIT(p)->id);
 709
 710                 /* Hmm, so inotify was triggered since the
 711                  * last activation, so I guess we need to
 712                  * recheck what is going on. */
 713                 path_enter_waiting(p, false, p->inotify_triggered);
 714         }
 715 }
 716
 717 static void path_reset_failed(Unit *u) {
 718         Path *p = PATH(u);
 719
 720         assert(p);
 721
 722         if (p->state == PATH_FAILED)
 723                 path_set_state(p, PATH_DEAD);
 724
 725         p->result = PATH_SUCCESS;
 726 }
 727
 728 static const char* const path_state_table[_PATH_STATE_MAX] = {
 729         [PATH_DEAD] = "dead",
 730         [PATH_WAITING] = "waiting",
 731         [PATH_RUNNING] = "running",
 732         [PATH_FAILED] = "failed"
 733 };
 734
 735 DEFINE_STRING_TABLE_LOOKUP(path_state, PathState);
 736
 737 static const char* const path_type_table[_PATH_TYPE_MAX] = {
 738         [PATH_EXISTS] = "PathExists",
 739         [PATH_EXISTS_GLOB] = "PathExistsGlob",
 740         [PATH_DIRECTORY_NOT_EMPTY] = "DirectoryNotEmpty",
 741         [PATH_CHANGED] = "PathChanged",
 742         [PATH_MODIFIED] = "PathModified",
 743 };
 744
 745 DEFINE_STRING_TABLE_LOOKUP(path_type, PathType);
 746
 747 static const char* const path_result_table[_PATH_RESULT_MAX] = {
 748         [PATH_SUCCESS] = "success",
 749         [PATH_FAILURE_RESOURCES] = "resources",
 750 };
 751
 752 DEFINE_STRING_TABLE_LOOKUP(path_result, PathResult);
 753
 754 const UnitVTable path_vtable = {
 755         .object_size = sizeof(Path),
 756
 757         .sections =
 758                 "Unit\0"
 759                 "Path\0"
 760                 "Install\0",
 761
 762         .init = path_init,
 763         .done = path_done,
 764         .load = path_load,
 765
 766         .coldplug = path_coldplug,
 767
 768         .dump = path_dump,
 769
 770         .start = path_start,
 771         .stop = path_stop,
 772
 773         .serialize = path_serialize,
 774         .deserialize_item = path_deserialize_item,
 775
 776         .active_state = path_active_state,
 777         .sub_state_to_string = path_sub_state_to_string,
 778
 779         .trigger_notify = path_trigger_notify,
 780
 781         .reset_failed = path_reset_failed,
 782
 783         .bus_interface = "org.freedesktop.systemd1.Path",
 784         .bus_vtable = bus_path_vtable
 785 };