mount.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   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 General Public License as published by
  10   the Free Software Foundation; either version 2 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   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <stdio.h>
  24 #include <mntent.h>
  25 #include <sys/epoll.h>
  26 #include <signal.h>
  27
  28 #include "unit.h"
  29 #include "mount.h"
  30 #include "load-fragment.h"
  31 #include "load-dropin.h"
  32 #include "log.h"
  33 #include "strv.h"
  34 #include "mount-setup.h"
  35 #include "unit-name.h"
  36 #include "mount.h"
  37 #include "dbus-mount.h"
  38
  39 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
  40         [MOUNT_DEAD] = UNIT_INACTIVE,
  41         [MOUNT_MOUNTING] = UNIT_ACTIVATING,
  42         [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
  43         [MOUNT_MOUNTED] = UNIT_ACTIVE,
  44         [MOUNT_REMOUNTING] = UNIT_ACTIVE_RELOADING,
  45         [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
  46         [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  47         [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  48         [MOUNT_REMOUNTING_SIGTERM] = UNIT_ACTIVE_RELOADING,
  49         [MOUNT_REMOUNTING_SIGKILL] = UNIT_ACTIVE_RELOADING,
  50         [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  51         [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  52         [MOUNT_MAINTAINANCE] = UNIT_INACTIVE,
  53 };
  54
  55 static void mount_init(Unit *u) {
  56         Mount *m = MOUNT(u);
  57
  58         assert(u);
  59         assert(u->meta.load_state == UNIT_STUB);
  60
  61         m->timeout_usec = DEFAULT_TIMEOUT_USEC;
  62         exec_context_init(&m->exec_context);
  63
  64         /* We need to make sure that /bin/mount is always called in
  65          * the same process group as us, so that the autofs kernel
  66          * side doesn't send us another mount request while we are
  67          * already trying to comply its last one. */
  68         m->exec_context.no_setsid = true;
  69
  70         m->timer_watch.type = WATCH_INVALID;
  71
  72         m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
  73 }
  74
  75 static void mount_unwatch_control_pid(Mount *m) {
  76         assert(m);
  77
  78         if (m->control_pid <= 0)
  79                 return;
  80
  81         unit_unwatch_pid(UNIT(m), m->control_pid);
  82         m->control_pid = 0;
  83 }
  84
  85 static void mount_parameters_done(MountParameters *p) {
  86         assert(p);
  87
  88         free(p->what);
  89         free(p->options);
  90         free(p->fstype);
  91
  92         p->what = p->options = p->fstype = NULL;
  93 }
  94
  95 static void mount_done(Unit *u) {
  96         Mount *m = MOUNT(u);
  97
  98         assert(m);
  99
 100         free(m->where);
 101         m->where = NULL;
 102
 103         mount_parameters_done(&m->parameters_etc_fstab);
 104         mount_parameters_done(&m->parameters_proc_self_mountinfo);
 105         mount_parameters_done(&m->parameters_fragment);
 106
 107         exec_context_done(&m->exec_context);
 108         exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
 109         m->control_command = NULL;
 110
 111         mount_unwatch_control_pid(m);
 112
 113         unit_unwatch_timer(u, &m->timer_watch);
 114 }
 115
 116 static int mount_add_node_links(Mount *m) {
 117         Unit *device;
 118         char *e;
 119         int r;
 120         const char *what;
 121
 122         assert(m);
 123
 124         /* Adds in links to the device that this node is based on */
 125
 126         if (m->parameters_fragment.what)
 127                 what = m->parameters_fragment.what;
 128         else if (m->parameters_etc_fstab.what)
 129                 what = m->parameters_etc_fstab.what;
 130         else
 131                 /* We observe kernel mounts only while they are live,
 132                  * hence don't create any links for them */
 133                 return 0;
 134
 135         if (!path_startswith(what, "/dev/"))
 136                 return 0;
 137
 138         if (!(e = unit_name_build_escape(what+1, NULL, ".device")))
 139                 return -ENOMEM;
 140
 141         r = manager_load_unit(UNIT(m)->meta.manager, e, NULL, &device);
 142         free(e);
 143
 144         if (r < 0)
 145                 return r;
 146
 147         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, device)) < 0)
 148                 return r;
 149
 150         if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, device)) < 0)
 151                 return r;
 152
 153         if (UNIT(m)->meta.manager->running_as == MANAGER_INIT ||
 154             UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)
 155                 if ((r = unit_add_dependency(device, UNIT_WANTS, UNIT(m))) < 0)
 156                         return r;
 157
 158         return 0;
 159 }
 160
 161 static int mount_add_path_links(Mount *m) {
 162         Meta *other;
 163         int r;
 164
 165         assert(m);
 166
 167         /* Adds in link to other mount points, that might lie below or
 168          * above us in the hierarchy */
 169
 170         LIST_FOREACH(units_per_type, other, UNIT(m)->meta.manager->units_per_type[UNIT_MOUNT]) {
 171                 Mount *n;
 172
 173                 n = (Mount*) other;
 174
 175                 if (n == m)
 176                         continue;
 177
 178                 if (m->meta.load_state != UNIT_LOADED)
 179                         continue;
 180
 181                 if (path_startswith(m->where, n->where)) {
 182
 183                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(other))) < 0)
 184                                 return r;
 185
 186                         if (n->from_etc_fstab || n->from_fragment)
 187                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(other))) < 0)
 188                                         return r;
 189
 190                 } else if (path_startswith(n->where, m->where)) {
 191
 192                         if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(other))) < 0)
 193                                 return r;
 194
 195                         if (m->from_etc_fstab || m->from_fragment)
 196                                 if ((r = unit_add_dependency(UNIT(other), UNIT_REQUIRES, UNIT(m))) < 0)
 197                                         return r;
 198                 }
 199         }
 200
 201         return 0;
 202 }
 203
 204 static bool mount_test_option(const char *haystack, const char *needle) {
 205         struct mntent me;
 206
 207         assert(needle);
 208
 209         /* Like glibc's hasmntopt(), but works on a string, not a
 210          * struct mntent */
 211
 212         if (!haystack)
 213                 return false;
 214
 215         zero(me);
 216         me.mnt_opts = (char*) haystack;
 217
 218         return !!hasmntopt(&me, needle);
 219 }
 220
 221 static int mount_add_target_links(Mount *m) {
 222         const char *target;
 223         MountParameters *p;
 224         Unit *tu;
 225         int r;
 226         bool noauto, handle, automount;
 227
 228         assert(m);
 229
 230         if (m->from_fragment)
 231                 p = &m->parameters_fragment;
 232         else if (m->from_etc_fstab)
 233                 p = &m->parameters_etc_fstab;
 234         else
 235                 return 0;
 236
 237         noauto = mount_test_option(p->options, MNTOPT_NOAUTO);
 238         handle = mount_test_option(p->options, "comment=systemd.mount");
 239         automount = mount_test_option(p->options, "comment=systemd.automount");
 240
 241         if (noauto && !handle && !automount)
 242                 return 0;
 243
 244         if (mount_test_option(p->options, "_netdev") ||
 245             fstype_is_network(p->fstype))
 246                 target = SPECIAL_REMOTE_FS_TARGET;
 247         else
 248                 target = SPECIAL_LOCAL_FS_TARGET;
 249
 250         if ((r = manager_load_unit(UNIT(m)->meta.manager, target, NULL, &tu)) < 0)
 251                 return r;
 252
 253         if (automount) {
 254                 Unit *am;
 255
 256                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
 257                         return r;
 258
 259                 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(am))) < 0)
 260                         return r;
 261
 262                 return unit_add_dependency(UNIT(am), UNIT_BEFORE, tu);
 263
 264         } else {
 265
 266                 if (handle)
 267                         if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m))) < 0)
 268                                 return r;
 269
 270                 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu);
 271         }
 272 }
 273
 274 static int mount_verify(Mount *m) {
 275         bool b;
 276         char *e;
 277         assert(m);
 278
 279         if (UNIT(m)->meta.load_state != UNIT_LOADED)
 280                 return 0;
 281
 282         if (!(e = unit_name_from_path(m->where, ".mount")))
 283                 return -ENOMEM;
 284
 285         b = unit_has_name(UNIT(m), e);
 286         free(e);
 287
 288         if (!b) {
 289                 log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->meta.id);
 290                 return -EINVAL;
 291         }
 292
 293         return 0;
 294 }
 295
 296 static int mount_load(Unit *u) {
 297         Mount *m = MOUNT(u);
 298         int r;
 299
 300         assert(u);
 301         assert(u->meta.load_state == UNIT_STUB);
 302
 303         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
 304                 return r;
 305
 306         /* This is a new unit? Then let's add in some extras */
 307         if (u->meta.load_state == UNIT_LOADED) {
 308
 309                 if (!m->where)
 310                         if (!(m->where = unit_name_to_path(u->meta.id)))
 311                                 return -ENOMEM;
 312
 313                 path_kill_slashes(m->where);
 314
 315                 /* Minor validity checking */
 316                 if ((m->parameters_fragment.options || m->parameters_fragment.fstype) && !m->parameters_fragment.what)
 317                         return -EBADMSG;
 318
 319                 if (m->parameters_fragment.what)
 320                         m->from_fragment = true;
 321
 322                 if ((r = mount_add_node_links(MOUNT(u))) < 0)
 323                         return r;
 324
 325                 if ((r = mount_add_path_links(MOUNT(u))) < 0)
 326                         return r;
 327
 328                 if ((r = mount_add_target_links(MOUNT(u))) < 0)
 329                         return r;
 330
 331                 if ((r = unit_add_default_cgroup(u)) < 0)
 332                         return r;
 333         }
 334
 335         return mount_verify(m);
 336 }
 337
 338 static int mount_notify_automount(Mount *m, int status) {
 339         Unit *p;
 340         int r;
 341
 342         assert(m);
 343
 344         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
 345                 return r == -ENOENT ? 0 : r;
 346
 347         return automount_send_ready(AUTOMOUNT(p), status);
 348 }
 349
 350 static void mount_set_state(Mount *m, MountState state) {
 351         MountState old_state;
 352         assert(m);
 353
 354         old_state = m->state;
 355         m->state = state;
 356
 357         if (state != MOUNT_MOUNTING &&
 358             state != MOUNT_MOUNTING_DONE &&
 359             state != MOUNT_REMOUNTING &&
 360             state != MOUNT_UNMOUNTING &&
 361             state != MOUNT_MOUNTING_SIGTERM &&
 362             state != MOUNT_MOUNTING_SIGKILL &&
 363             state != MOUNT_UNMOUNTING_SIGTERM &&
 364             state != MOUNT_UNMOUNTING_SIGKILL &&
 365             state != MOUNT_REMOUNTING_SIGTERM &&
 366             state != MOUNT_REMOUNTING_SIGKILL) {
 367                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
 368                 mount_unwatch_control_pid(m);
 369                 m->control_command = NULL;
 370                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 371         }
 372
 373         if (state == MOUNT_MOUNTED ||
 374             state == MOUNT_REMOUNTING)
 375                 mount_notify_automount(m, 0);
 376         else if (state == MOUNT_DEAD ||
 377                  state == MOUNT_UNMOUNTING ||
 378                  state == MOUNT_MOUNTING_SIGTERM ||
 379                  state == MOUNT_MOUNTING_SIGKILL ||
 380                  state == MOUNT_REMOUNTING_SIGTERM ||
 381                  state == MOUNT_REMOUNTING_SIGKILL ||
 382                  state == MOUNT_UNMOUNTING_SIGTERM ||
 383                  state == MOUNT_UNMOUNTING_SIGKILL ||
 384                  state == MOUNT_MAINTAINANCE)
 385                 mount_notify_automount(m, -ENODEV);
 386
 387         if (state != old_state)
 388                 log_debug("%s changed %s → %s",
 389                           UNIT(m)->meta.id,
 390                           mount_state_to_string(old_state),
 391                           mount_state_to_string(state));
 392
 393         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
 394 }
 395
 396 static int mount_coldplug(Unit *u) {
 397         Mount *m = MOUNT(u);
 398         MountState new_state = MOUNT_DEAD;
 399         int r;
 400
 401         assert(m);
 402         assert(m->state == MOUNT_DEAD);
 403
 404         if (m->deserialized_state != m->state)
 405                 new_state = m->deserialized_state;
 406         else if (m->from_proc_self_mountinfo)
 407                 new_state = MOUNT_MOUNTED;
 408
 409         if (new_state != m->state) {
 410
 411                 if (new_state == MOUNT_MOUNTING ||
 412                     new_state == MOUNT_MOUNTING_DONE ||
 413                     new_state == MOUNT_REMOUNTING ||
 414                     new_state == MOUNT_UNMOUNTING ||
 415                     new_state == MOUNT_MOUNTING_SIGTERM ||
 416                     new_state == MOUNT_MOUNTING_SIGKILL ||
 417                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
 418                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
 419                     new_state == MOUNT_REMOUNTING_SIGTERM ||
 420                     new_state == MOUNT_REMOUNTING_SIGKILL) {
 421
 422                         if (m->control_pid <= 0)
 423                                 return -EBADMSG;
 424
 425                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
 426                                 return r;
 427
 428                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 429                                 return r;
 430                 }
 431
 432                 mount_set_state(m, new_state);
 433         }
 434
 435         return 0;
 436 }
 437
 438 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
 439         Mount *m = MOUNT(u);
 440         MountParameters *p;
 441
 442         assert(m);
 443         assert(f);
 444
 445         if (m->from_proc_self_mountinfo)
 446                 p = &m->parameters_proc_self_mountinfo;
 447         else if (m->from_fragment)
 448                 p = &m->parameters_fragment;
 449         else
 450                 p = &m->parameters_etc_fstab;
 451
 452         fprintf(f,
 453                 "%sMount State: %s\n"
 454                 "%sWhere: %s\n"
 455                 "%sWhat: %s\n"
 456                 "%sFile System Type: %s\n"
 457                 "%sOptions: %s\n"
 458                 "%sFrom /etc/fstab: %s\n"
 459                 "%sFrom /proc/self/mountinfo: %s\n"
 460                 "%sFrom fragment: %s\n"
 461                 "%sKillMode: %s\n",
 462                 prefix, mount_state_to_string(m->state),
 463                 prefix, m->where,
 464                 prefix, strna(p->what),
 465                 prefix, strna(p->fstype),
 466                 prefix, strna(p->options),
 467                 prefix, yes_no(m->from_etc_fstab),
 468                 prefix, yes_no(m->from_proc_self_mountinfo),
 469                 prefix, yes_no(m->from_fragment),
 470                 prefix, kill_mode_to_string(m->kill_mode));
 471
 472         if (m->control_pid > 0)
 473                 fprintf(f,
 474                         "%sControl PID: %llu\n",
 475                         prefix, (unsigned long long) m->control_pid);
 476
 477         exec_context_dump(&m->exec_context, f, prefix);
 478 }
 479
 480 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 481         pid_t pid;
 482         int r;
 483
 484         assert(m);
 485         assert(c);
 486         assert(_pid);
 487
 488         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 489                 goto fail;
 490
 491         if ((r = exec_spawn(c,
 492                             NULL,
 493                             &m->exec_context,
 494                             NULL, 0,
 495                             true,
 496                             true,
 497                             UNIT(m)->meta.manager->confirm_spawn,
 498                             UNIT(m)->meta.cgroup_bondings,
 499                             &pid)) < 0)
 500                 goto fail;
 501
 502         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 503                 /* FIXME: we need to do something here */
 504                 goto fail;
 505
 506         *_pid = pid;
 507
 508         return 0;
 509
 510 fail:
 511         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 512
 513         return r;
 514 }
 515
 516 static void mount_enter_dead(Mount *m, bool success) {
 517         assert(m);
 518
 519         if (!success)
 520                 m->failure = true;
 521
 522         mount_set_state(m, m->failure ? MOUNT_MAINTAINANCE : MOUNT_DEAD);
 523 }
 524
 525 static void mount_enter_mounted(Mount *m, bool success) {
 526         assert(m);
 527
 528         if (!success)
 529                 m->failure = true;
 530
 531         mount_set_state(m, MOUNT_MOUNTED);
 532 }
 533
 534 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 535         int r;
 536         bool sent = false;
 537
 538         assert(m);
 539
 540         if (!success)
 541                 m->failure = true;
 542
 543         if (m->kill_mode != KILL_NONE) {
 544                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 545                            state == MOUNT_UNMOUNTING_SIGTERM ||
 546                            state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
 547
 548                 if (m->kill_mode == KILL_CONTROL_GROUP) {
 549
 550                         if ((r = cgroup_bonding_kill_list(UNIT(m)->meta.cgroup_bondings, sig)) < 0) {
 551                                 if (r != -EAGAIN && r != -ESRCH)
 552                                         goto fail;
 553                         } else
 554                                 sent = true;
 555                 }
 556
 557                 if (!sent && m->control_pid > 0)
 558                         if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
 559                                 r = -errno;
 560                                 goto fail;
 561                         }
 562         }
 563
 564         if (sent) {
 565                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 566                         goto fail;
 567
 568                 mount_set_state(m, state);
 569         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 570                 mount_enter_mounted(m, true);
 571         else
 572                 mount_enter_dead(m, true);
 573
 574         return;
 575
 576 fail:
 577         log_warning("%s failed to kill processes: %s", UNIT(m)->meta.id, strerror(-r));
 578
 579         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 580                 mount_enter_mounted(m, false);
 581         else
 582                 mount_enter_dead(m, false);
 583 }
 584
 585 static void mount_enter_unmounting(Mount *m, bool success) {
 586         int r;
 587
 588         assert(m);
 589
 590         if (!success)
 591                 m->failure = true;
 592
 593         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 594         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 595
 596         if ((r = exec_command_set(
 597                              m->control_command,
 598                              "/bin/umount",
 599                              m->where,
 600                              NULL)) < 0)
 601                 goto fail;
 602
 603         mount_unwatch_control_pid(m);
 604
 605         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 606                 goto fail;
 607
 608         mount_set_state(m, MOUNT_UNMOUNTING);
 609
 610         return;
 611
 612 fail:
 613         log_warning("%s failed to run umount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
 614         mount_enter_mounted(m, false);
 615 }
 616
 617 static void mount_enter_mounting(Mount *m) {
 618         int r;
 619
 620         assert(m);
 621
 622         m->control_command_id = MOUNT_EXEC_MOUNT;
 623         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 624
 625         if (m->from_fragment)
 626                 r = exec_command_set(
 627                                 m->control_command,
 628                                 "/bin/mount",
 629                                 m->parameters_fragment.what,
 630                                 m->where,
 631                                 "-t", m->parameters_fragment.fstype,
 632                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 633                                 NULL);
 634         else if (m->from_etc_fstab)
 635                 r = exec_command_set(
 636                                 m->control_command,
 637                                 "/bin/mount",
 638                                 m->where,
 639                                 NULL);
 640         else
 641                 r = -ENOENT;
 642
 643         if (r < 0)
 644                 goto fail;
 645
 646         mount_unwatch_control_pid(m);
 647
 648         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 649                 goto fail;
 650
 651         mount_set_state(m, MOUNT_MOUNTING);
 652
 653         return;
 654
 655 fail:
 656         log_warning("%s failed to run mount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
 657         mount_enter_dead(m, false);
 658 }
 659
 660 static void mount_enter_mounting_done(Mount *m) {
 661         assert(m);
 662
 663         mount_set_state(m, MOUNT_MOUNTING_DONE);
 664 }
 665
 666 static void mount_enter_remounting(Mount *m, bool success) {
 667         int r;
 668
 669         assert(m);
 670
 671         if (!success)
 672                 m->failure = true;
 673
 674         m->control_command_id = MOUNT_EXEC_REMOUNT;
 675         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 676
 677         if (m->from_fragment) {
 678                 char *buf = NULL;
 679                 const char *o;
 680
 681                 if (m->parameters_fragment.options) {
 682                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 683                                 r = -ENOMEM;
 684                                 goto fail;
 685                         }
 686
 687                         o = buf;
 688                 } else
 689                         o = "remount";
 690
 691                 r = exec_command_set(
 692                                 m->control_command,
 693                                 "/bin/mount",
 694                                 m->parameters_fragment.what,
 695                                 m->where,
 696                                 "-t", m->parameters_fragment.fstype,
 697                                 "-o", o,
 698                                 NULL);
 699
 700                 free(buf);
 701         } else if (m->from_etc_fstab)
 702                 r = exec_command_set(
 703                                 m->control_command,
 704                                 "/bin/mount",
 705                                 m->where,
 706                                 "-o", "remount",
 707                                 NULL);
 708         else
 709                 r = -ENOENT;
 710
 711         if (r < 0) {
 712                 r = -ENOMEM;
 713                 goto fail;
 714         }
 715
 716         mount_unwatch_control_pid(m);
 717
 718         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 719                 goto fail;
 720
 721         mount_set_state(m, MOUNT_REMOUNTING);
 722
 723         return;
 724
 725 fail:
 726         mount_enter_mounted(m, false);
 727 }
 728
 729 static int mount_start(Unit *u) {
 730         Mount *m = MOUNT(u);
 731
 732         assert(m);
 733
 734         /* We cannot fulfill this request right now, try again later
 735          * please! */
 736         if (m->state == MOUNT_UNMOUNTING ||
 737             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 738             m->state == MOUNT_UNMOUNTING_SIGKILL)
 739                 return -EAGAIN;
 740
 741         /* Already on it! */
 742         if (m->state == MOUNT_MOUNTING ||
 743             m->state == MOUNT_MOUNTING_SIGTERM ||
 744             m->state == MOUNT_MOUNTING_SIGKILL)
 745                 return 0;
 746
 747         assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTAINANCE);
 748
 749         m->failure = false;
 750         mount_enter_mounting(m);
 751         return 0;
 752 }
 753
 754 static int mount_stop(Unit *u) {
 755         Mount *m = MOUNT(u);
 756
 757         assert(m);
 758
 759         /* Cann't do this right now. */
 760         if (m->state == MOUNT_MOUNTING ||
 761             m->state == MOUNT_MOUNTING_DONE ||
 762             m->state == MOUNT_MOUNTING_SIGTERM ||
 763             m->state == MOUNT_MOUNTING_SIGKILL ||
 764             m->state == MOUNT_REMOUNTING ||
 765             m->state == MOUNT_REMOUNTING_SIGTERM ||
 766             m->state == MOUNT_REMOUNTING_SIGKILL)
 767                 return -EAGAIN;
 768
 769         /* Already on it */
 770         if (m->state == MOUNT_UNMOUNTING ||
 771             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 772             m->state == MOUNT_UNMOUNTING_SIGTERM)
 773                 return 0;
 774
 775         assert(m->state == MOUNT_MOUNTED);
 776
 777         mount_enter_unmounting(m, true);
 778         return 0;
 779 }
 780
 781 static int mount_reload(Unit *u) {
 782         Mount *m = MOUNT(u);
 783
 784         assert(m);
 785
 786         if (m->state == MOUNT_MOUNTING_DONE)
 787                 return -EAGAIN;
 788
 789         assert(m->state == MOUNT_MOUNTED);
 790
 791         mount_enter_remounting(m, true);
 792         return 0;
 793 }
 794
 795 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
 796         Mount *m = MOUNT(u);
 797
 798         assert(m);
 799         assert(f);
 800         assert(fds);
 801
 802         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
 803         unit_serialize_item(u, f, "failure", yes_no(m->failure));
 804
 805         if (m->control_pid > 0)
 806                 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) m->control_pid);
 807
 808         if (m->control_command_id >= 0)
 809                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
 810
 811         return 0;
 812 }
 813
 814 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
 815         Mount *m = MOUNT(u);
 816         int r;
 817
 818         assert(u);
 819         assert(key);
 820         assert(value);
 821         assert(fds);
 822
 823         if (streq(key, "state")) {
 824                 MountState state;
 825
 826                 if ((state = mount_state_from_string(value)) < 0)
 827                         log_debug("Failed to parse state value %s", value);
 828                 else
 829                         m->deserialized_state = state;
 830         } else if (streq(key, "failure")) {
 831                 int b;
 832
 833                 if ((b = parse_boolean(value)) < 0)
 834                         log_debug("Failed to parse failure value %s", value);
 835                 else
 836                         m->failure = b || m->failure;
 837
 838         } else if (streq(key, "control-pid")) {
 839                 unsigned pid;
 840
 841                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
 842                         log_debug("Failed to parse control-pid value %s", value);
 843                 else
 844                         m->control_pid = (pid_t) pid;
 845         } else if (streq(key, "control-command")) {
 846                 MountExecCommand id;
 847
 848                 if ((id = mount_exec_command_from_string(value)) < 0)
 849                         log_debug("Failed to parse exec-command value %s", value);
 850                 else {
 851                         m->control_command_id = id;
 852                         m->control_command = m->exec_command + id;
 853                 }
 854
 855         } else
 856                 log_debug("Unknown serialization key '%s'", key);
 857
 858         return 0;
 859 }
 860
 861 static UnitActiveState mount_active_state(Unit *u) {
 862         assert(u);
 863
 864         return state_translation_table[MOUNT(u)->state];
 865 }
 866
 867 static const char *mount_sub_state_to_string(Unit *u) {
 868         assert(u);
 869
 870         return mount_state_to_string(MOUNT(u)->state);
 871 }
 872
 873 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
 874         Mount *m = MOUNT(u);
 875         bool success;
 876
 877         assert(m);
 878         assert(pid >= 0);
 879
 880         success = code == CLD_EXITED && status == 0;
 881         m->failure = m->failure || !success;
 882
 883         assert(m->control_pid == pid);
 884         m->control_pid = 0;
 885
 886         if (m->control_command) {
 887                 exec_status_fill(&m->control_command->exec_status, pid, code, status);
 888                 m->control_command = NULL;
 889                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 890         }
 891
 892         log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
 893
 894         /* Note that mount(8) returning and the kernel sending us a
 895          * mount table change event might happen out-of-order. If an
 896          * operation succeed we assume the kernel will follow soon too
 897          * and already change into the resulting state.  If it fails
 898          * we check if the kernel still knows about the mount. and
 899          * change state accordingly. */
 900
 901         switch (m->state) {
 902
 903         case MOUNT_MOUNTING:
 904         case MOUNT_MOUNTING_DONE:
 905         case MOUNT_MOUNTING_SIGKILL:
 906         case MOUNT_MOUNTING_SIGTERM:
 907         case MOUNT_REMOUNTING:
 908         case MOUNT_REMOUNTING_SIGKILL:
 909         case MOUNT_REMOUNTING_SIGTERM:
 910
 911                 if (success && m->from_proc_self_mountinfo)
 912                         mount_enter_mounted(m, true);
 913                 else if (m->from_proc_self_mountinfo)
 914                         mount_enter_mounted(m, false);
 915                 else
 916                         mount_enter_dead(m, false);
 917                 break;
 918
 919         case MOUNT_UNMOUNTING:
 920         case MOUNT_UNMOUNTING_SIGKILL:
 921         case MOUNT_UNMOUNTING_SIGTERM:
 922
 923                 if (success)
 924                         mount_enter_dead(m, true);
 925                 else if (m->from_proc_self_mountinfo)
 926                         mount_enter_mounted(m, false);
 927                 else
 928                         mount_enter_dead(m, false);
 929                 break;
 930
 931         default:
 932                 assert_not_reached("Uh, control process died at wrong time.");
 933         }
 934 }
 935
 936 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
 937         Mount *m = MOUNT(u);
 938
 939         assert(m);
 940         assert(elapsed == 1);
 941         assert(w == &m->timer_watch);
 942
 943         switch (m->state) {
 944
 945         case MOUNT_MOUNTING:
 946         case MOUNT_MOUNTING_DONE:
 947                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
 948                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
 949                 break;
 950
 951         case MOUNT_REMOUNTING:
 952                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
 953                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
 954                 break;
 955
 956         case MOUNT_UNMOUNTING:
 957                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
 958                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
 959                 break;
 960
 961         case MOUNT_MOUNTING_SIGTERM:
 962                 log_warning("%s mounting timed out. Killing.", u->meta.id);
 963                 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
 964                 break;
 965
 966         case MOUNT_REMOUNTING_SIGTERM:
 967                 log_warning("%s remounting timed out. Killing.", u->meta.id);
 968                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
 969                 break;
 970
 971         case MOUNT_UNMOUNTING_SIGTERM:
 972                 log_warning("%s unmounting timed out. Killing.", u->meta.id);
 973                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
 974                 break;
 975
 976         case MOUNT_MOUNTING_SIGKILL:
 977         case MOUNT_REMOUNTING_SIGKILL:
 978         case MOUNT_UNMOUNTING_SIGKILL:
 979                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
 980
 981                 if (m->from_proc_self_mountinfo)
 982                         mount_enter_mounted(m, false);
 983                 else
 984                         mount_enter_dead(m, false);
 985                 break;
 986
 987         default:
 988                 assert_not_reached("Timeout at wrong time.");
 989         }
 990 }
 991
 992 static int mount_add_one(
 993                 Manager *m,
 994                 const char *what,
 995                 const char *where,
 996                 const char *options,
 997                 const char *fstype,
 998                 bool from_proc_self_mountinfo,
 999                 bool set_flags) {
1000         int r;
1001         Unit *u;
1002         bool delete;
1003         char *e, *w = NULL, *o = NULL, *f = NULL;
1004         MountParameters *mp;
1005
1006         assert(m);
1007         assert(what);
1008         assert(where);
1009         assert(options);
1010         assert(fstype);
1011
1012         assert(!set_flags || from_proc_self_mountinfo);
1013
1014         /* Ignore API mount points. They should never be referenced in
1015          * dependencies ever. */
1016         if (mount_point_is_api(where))
1017                 return 0;
1018
1019         if (streq(fstype, "autofs"))
1020                 return 0;
1021
1022         /* probably some kind of swap, which we don't cover for now */
1023         if (where[0] != '/')
1024                 return 0;
1025
1026         if (!(e = unit_name_from_path(where, ".mount")))
1027                 return -ENOMEM;
1028
1029         if (!(u = manager_get_unit(m, e))) {
1030                 delete = true;
1031
1032                 if (!(u = unit_new(m))) {
1033                         free(e);
1034                         return -ENOMEM;
1035                 }
1036
1037                 r = unit_add_name(u, e);
1038                 free(e);
1039
1040                 if (r < 0)
1041                         goto fail;
1042
1043                 if (!(MOUNT(u)->where = strdup(where))) {
1044                             r = -ENOMEM;
1045                             goto fail;
1046                     }
1047
1048                 if ((r = unit_set_description(u, where)) < 0)
1049                         goto fail;
1050
1051                 unit_add_to_load_queue(u);
1052         } else {
1053                 delete = false;
1054                 free(e);
1055         }
1056
1057         if (!(w = strdup(what)) ||
1058             !(o = strdup(options)) ||
1059             !(f = strdup(fstype))) {
1060                 r = -ENOMEM;
1061                 goto fail;
1062         }
1063
1064         if (from_proc_self_mountinfo) {
1065                 mp = &MOUNT(u)->parameters_proc_self_mountinfo;
1066
1067                 if (set_flags) {
1068                         MOUNT(u)->is_mounted = true;
1069                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1070                         MOUNT(u)->just_changed = !streq_ptr(MOUNT(u)->parameters_proc_self_mountinfo.options, o);
1071                 }
1072
1073                 MOUNT(u)->from_proc_self_mountinfo = true;
1074
1075         } else {
1076                 mp = &MOUNT(u)->parameters_etc_fstab;
1077
1078                 MOUNT(u)->from_etc_fstab = true;
1079         }
1080
1081         free(mp->what);
1082         mp->what = w;
1083
1084         free(mp->options);
1085         mp->options = o;
1086
1087         free(mp->fstype);
1088         mp->fstype = f;
1089
1090         unit_add_to_dbus_queue(u);
1091
1092         return 0;
1093
1094 fail:
1095         free(w);
1096         free(o);
1097         free(f);
1098
1099         if (delete && u)
1100                 unit_free(u);
1101
1102         return 0;
1103 }
1104
1105 static char *fstab_node_to_udev_node(char *p) {
1106         char *dn, *t;
1107         int r;
1108
1109         /* FIXME: to follow udev's logic 100% we need to leave valid
1110          * UTF8 chars unescaped */
1111
1112         if (startswith(p, "LABEL=")) {
1113
1114                 if (!(t = xescape(p+6, "/ ")))
1115                         return NULL;
1116
1117                 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1118                 free(t);
1119
1120                 if (r < 0)
1121                         return NULL;
1122
1123                 return dn;
1124         }
1125
1126         if (startswith(p, "UUID=")) {
1127
1128                 if (!(t = xescape(p+5, "/ ")))
1129                         return NULL;
1130
1131                 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1132                 free(t);
1133
1134                 if (r < 0)
1135                         return NULL;
1136
1137                 return dn;
1138         }
1139
1140         return strdup(p);
1141 }
1142
1143 static int mount_load_etc_fstab(Manager *m) {
1144         FILE *f;
1145         int r;
1146         struct mntent* me;
1147
1148         assert(m);
1149
1150         errno = 0;
1151         if (!(f = setmntent("/etc/fstab", "r")))
1152                 return -errno;
1153
1154         while ((me = getmntent(f))) {
1155                 char *where, *what;
1156
1157                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1158                         r = -ENOMEM;
1159                         goto finish;
1160                 }
1161
1162                 if (!(where = strdup(me->mnt_dir))) {
1163                         free(what);
1164                         r = -ENOMEM;
1165                         goto finish;
1166                 }
1167
1168                 if (what[0] == '/')
1169                         path_kill_slashes(what);
1170
1171                 if (where[0] == '/')
1172                         path_kill_slashes(where);
1173
1174                 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1175                 free(what);
1176                 free(where);
1177
1178                 if (r < 0)
1179                         goto finish;
1180         }
1181
1182         r = 0;
1183 finish:
1184
1185         endmntent(f);
1186         return r;
1187 }
1188
1189 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1190         int r;
1191         char *device, *path, *options, *fstype, *d, *p;
1192
1193         assert(m);
1194
1195         rewind(m->proc_self_mountinfo);
1196
1197         for (;;) {
1198                 int k;
1199
1200                 device = path = options = fstype = d = p = NULL;
1201
1202                 if ((k = fscanf(m->proc_self_mountinfo,
1203                                 "%*s "       /* (1) mount id */
1204                                 "%*s "       /* (2) parent id */
1205                                 "%*s "       /* (3) major:minor */
1206                                 "%*s "       /* (4) root */
1207                                 "%ms "       /* (5) mount point */
1208                                 "%ms"        /* (6) mount options */
1209                                 "%*[^-]"     /* (7) optional fields */
1210                                 "- "         /* (8) seperator */
1211                                 "%ms "       /* (9) file system type */
1212                                 "%ms"        /* (10) mount source */
1213                                 "%*[^\n]",   /* some rubbish at the end */
1214                                 &path,
1215                                 &options,
1216                                 &fstype,
1217                                 &device)) != 4) {
1218
1219                         if (k == EOF)
1220                                 break;
1221
1222                         r = -EBADMSG;
1223                         goto finish;
1224                 }
1225
1226                 if (!(d = cunescape(device)) ||
1227                     !(p = cunescape(path))) {
1228                         r = -ENOMEM;
1229                         goto finish;
1230                 }
1231
1232                 if ((r = mount_add_one(m, d, p, options, fstype, true, set_flags)) < 0)
1233                         goto finish;
1234
1235                 free(device);
1236                 free(path);
1237                 free(options);
1238                 free(fstype);
1239                 free(d);
1240                 free(p);
1241         }
1242
1243         r = 0;
1244
1245 finish:
1246         free(device);
1247         free(path);
1248         free(options);
1249         free(fstype);
1250         free(d);
1251         free(p);
1252
1253         return r;
1254 }
1255
1256 static void mount_shutdown(Manager *m) {
1257         assert(m);
1258
1259         if (m->proc_self_mountinfo) {
1260                 fclose(m->proc_self_mountinfo);
1261                 m->proc_self_mountinfo = NULL;
1262         }
1263 }
1264
1265 static int mount_enumerate(Manager *m) {
1266         int r;
1267         struct epoll_event ev;
1268         assert(m);
1269
1270         if (!m->proc_self_mountinfo) {
1271                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1272                         return -errno;
1273
1274                 m->mount_watch.type = WATCH_MOUNT;
1275                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1276
1277                 zero(ev);
1278                 ev.events = EPOLLERR;
1279                 ev.data.ptr = &m->mount_watch;
1280
1281                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1282                         return -errno;
1283         }
1284
1285         if ((r = mount_load_etc_fstab(m)) < 0)
1286                 goto fail;
1287
1288         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1289                 goto fail;
1290
1291         return 0;
1292
1293 fail:
1294         mount_shutdown(m);
1295         return r;
1296 }
1297
1298 void mount_fd_event(Manager *m, int events) {
1299         Meta *meta;
1300         int r;
1301
1302         assert(m);
1303         assert(events == EPOLLERR);
1304
1305         /* The manager calls this for every fd event happening on the
1306          * /proc/self/mountinfo file, which informs us about mounting
1307          * table changes */
1308
1309         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1310                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-errno));
1311
1312                 /* Reset flags, just in case, for later calls */
1313                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1314                         Mount *mount = (Mount*) meta;
1315
1316                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1317                 }
1318
1319                 return;
1320         }
1321
1322         manager_dispatch_load_queue(m);
1323
1324         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1325                 Mount *mount = (Mount*) meta;
1326
1327                 if (!mount->is_mounted) {
1328                         /* This has just been unmounted. */
1329
1330                         mount->from_proc_self_mountinfo = false;
1331
1332                         switch (mount->state) {
1333
1334                         case MOUNT_MOUNTED:
1335                                 mount_enter_dead(mount, true);
1336                                 break;
1337
1338                         default:
1339                                 mount_set_state(mount, mount->state);
1340                                 break;
1341
1342                         }
1343
1344                 } else if (mount->just_mounted || mount->just_changed) {
1345
1346                         /* New or changed entrymount */
1347
1348                         switch (mount->state) {
1349
1350                         case MOUNT_DEAD:
1351                         case MOUNT_MAINTAINANCE:
1352                                 mount_enter_mounted(mount, true);
1353                                 break;
1354
1355                         case MOUNT_MOUNTING:
1356                                 mount_enter_mounting_done(mount);
1357                                 break;
1358
1359                         default:
1360                                 /* Nothing really changed, but let's
1361                                  * issue an notification call
1362                                  * nonetheless, in case somebody is
1363                                  * waiting for this. (e.g. file system
1364                                  * ro/rw remounts.) */
1365                                 mount_set_state(mount, mount->state);
1366                                 break;
1367                         }
1368                 }
1369
1370                 /* Reset the flags for later calls */
1371                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1372         }
1373 }
1374
1375 int mount_path_is_mounted(Manager *m, const char* path) {
1376         char *t;
1377         int r;
1378
1379         assert(m);
1380         assert(path);
1381
1382         if (path[0] != '/')
1383                 return 1;
1384
1385         if (!(t = strdup(path)))
1386                 return -ENOMEM;
1387
1388         path_kill_slashes(t);
1389
1390         for (;;) {
1391                 char *e, *slash;
1392                 Unit *u;
1393
1394                 if (!(e = unit_name_from_path(t, ".mount"))) {
1395                         r = -ENOMEM;
1396                         goto finish;
1397                 }
1398
1399                 u = manager_get_unit(m, e);
1400                 free(e);
1401
1402                 if (u &&
1403                     (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1404                     MOUNT(u)->state != MOUNT_MOUNTED) {
1405                         r = 0;
1406                         goto finish;
1407                 }
1408
1409                 assert_se(slash = strrchr(t, '/'));
1410
1411                 if (slash == t) {
1412                         r = 1;
1413                         goto finish;
1414                 }
1415
1416                 *slash = 0;
1417         }
1418
1419         r = 1;
1420
1421 finish:
1422         free(t);
1423         return r;
1424 }
1425
1426 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1427         [MOUNT_DEAD] = "dead",
1428         [MOUNT_MOUNTING] = "mounting",
1429         [MOUNT_MOUNTING_DONE] = "mounting-done",
1430         [MOUNT_MOUNTED] = "mounted",
1431         [MOUNT_REMOUNTING] = "remounting",
1432         [MOUNT_UNMOUNTING] = "unmounting",
1433         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1434         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1435         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1436         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1437         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1438         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1439         [MOUNT_MAINTAINANCE] = "maintainance"
1440 };
1441
1442 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1443
1444 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1445         [MOUNT_EXEC_MOUNT] = "ExecMount",
1446         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1447         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1448 };
1449
1450 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1451
1452 const UnitVTable mount_vtable = {
1453         .suffix = ".mount",
1454
1455         .no_alias = true,
1456         .no_instances = true,
1457
1458         .init = mount_init,
1459         .load = mount_load,
1460         .done = mount_done,
1461
1462         .coldplug = mount_coldplug,
1463
1464         .dump = mount_dump,
1465
1466         .start = mount_start,
1467         .stop = mount_stop,
1468         .reload = mount_reload,
1469
1470         .serialize = mount_serialize,
1471         .deserialize_item = mount_deserialize_item,
1472
1473         .active_state = mount_active_state,
1474         .sub_state_to_string = mount_sub_state_to_string,
1475
1476         .sigchld_event = mount_sigchld_event,
1477         .timer_event = mount_timer_event,
1478
1479         .bus_message_handler = bus_mount_message_handler,
1480
1481         .enumerate = mount_enumerate,
1482         .shutdown = mount_shutdown
1483 };