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 int mount_add_node_links(Unit *u, const char *what) {
 117         Unit *device;
 118         char *e;
 119         int r;
 120
 121         assert(u);
 122
 123         if (!what)
 124                 /* We observe kernel mounts only while they are live,
 125                  * hence don't create any links for them */
 126                 return 0;
 127
 128         /* Adds in links to the device that this node is based on */
 129
 130         if (!path_startswith(what, "/dev/"))
 131                 return 0;
 132
 133         if (!(e = unit_name_build_escape(what+1, NULL, ".device")))
 134                 return -ENOMEM;
 135
 136         r = manager_load_unit(u->meta.manager, e, NULL, &device);
 137         free(e);
 138
 139         if (r < 0)
 140                 return r;
 141
 142         if ((r = unit_add_dependency(u, UNIT_AFTER, device, true)) < 0)
 143                 return r;
 144
 145         if ((r = unit_add_dependency(u, UNIT_REQUIRES, device, true)) < 0)
 146                 return r;
 147
 148         if (u->meta.manager->running_as == MANAGER_INIT ||
 149             u->meta.manager->running_as == MANAGER_SYSTEM)
 150                 if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0)
 151                         return r;
 152
 153         return 0;
 154 }
 155
 156 int mount_add_path_links(Unit *u, const char *where, bool requires) {
 157         Meta *other;
 158         int r;
 159
 160         assert(u);
 161
 162         /* Adds in link to other mount points, that might lie below or
 163          * above us in the hierarchy */
 164
 165         LIST_FOREACH(units_per_type, other, u->meta.manager->units_per_type[UNIT_MOUNT]) {
 166                 Mount *n;
 167
 168                 n = (Mount*) other;
 169
 170                 if (UNIT(n) == u)
 171                         continue;
 172
 173                 if (u->meta.load_state != UNIT_LOADED)
 174                         continue;
 175
 176                 if (path_startswith(where, n->where)) {
 177
 178                         if ((r = unit_add_dependency(u, UNIT_AFTER, UNIT(other), true)) < 0)
 179                                 return r;
 180
 181                         if (requires)
 182                                 if ((r = unit_add_dependency(u, UNIT_REQUIRES, UNIT(other), true)) < 0)
 183                                         return r;
 184
 185                 } else if (path_startswith(n->where, where)) {
 186
 187                         if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(other), true)) < 0)
 188                                 return r;
 189
 190                         if (requires)
 191                                 if ((r = unit_add_dependency(UNIT(other), UNIT_REQUIRES, u, true)) < 0)
 192                                         return r;
 193                 }
 194         }
 195
 196         return 0;
 197 }
 198
 199 static char* mount_test_option(const char *haystack, const char *needle) {
 200         struct mntent me;
 201
 202         assert(needle);
 203
 204         /* Like glibc's hasmntopt(), but works on a string, not a
 205          * struct mntent */
 206
 207         if (!haystack)
 208                 return false;
 209
 210         zero(me);
 211         me.mnt_opts = (char*) haystack;
 212
 213         return hasmntopt(&me, needle);
 214 }
 215
 216 static int mount_add_target_links(Mount *m) {
 217         const char *target;
 218         MountParameters *p;
 219         Unit *tu;
 220         int r;
 221         bool noauto, handle, automount;
 222
 223         assert(m);
 224
 225         if (m->from_fragment)
 226                 p = &m->parameters_fragment;
 227         else if (m->from_etc_fstab)
 228                 p = &m->parameters_etc_fstab;
 229         else
 230                 return 0;
 231
 232         noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 233         handle = !!mount_test_option(p->options, "comment=systemd.mount");
 234         automount = !!mount_test_option(p->options, "comment=systemd.automount");
 235
 236         if (noauto && !handle && !automount)
 237                 return 0;
 238
 239         if (mount_test_option(p->options, "_netdev") ||
 240             fstype_is_network(p->fstype))
 241                 target = SPECIAL_REMOTE_FS_TARGET;
 242         else
 243                 target = SPECIAL_LOCAL_FS_TARGET;
 244
 245         if ((r = manager_load_unit(UNIT(m)->meta.manager, target, NULL, &tu)) < 0)
 246                 return r;
 247
 248         if (automount) {
 249                 Unit *am;
 250
 251                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
 252                         return r;
 253
 254                 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(am), true)) < 0)
 255                         return r;
 256
 257                 return unit_add_dependency(UNIT(am), UNIT_BEFORE, tu, true);
 258
 259         } else {
 260
 261                 if (handle)
 262                         if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
 263                                 return r;
 264
 265                 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
 266         }
 267 }
 268
 269 static int mount_verify(Mount *m) {
 270         bool b;
 271         char *e;
 272         assert(m);
 273
 274         if (UNIT(m)->meta.load_state != UNIT_LOADED)
 275                 return 0;
 276
 277         if (!(e = unit_name_from_path(m->where, ".mount")))
 278                 return -ENOMEM;
 279
 280         b = unit_has_name(UNIT(m), e);
 281         free(e);
 282
 283         if (!b) {
 284                 log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->meta.id);
 285                 return -EINVAL;
 286         }
 287
 288         return 0;
 289 }
 290
 291 static int mount_load(Unit *u) {
 292         Mount *m = MOUNT(u);
 293         int r;
 294
 295         assert(u);
 296         assert(u->meta.load_state == UNIT_STUB);
 297
 298         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
 299                 return r;
 300
 301         /* This is a new unit? Then let's add in some extras */
 302         if (u->meta.load_state == UNIT_LOADED) {
 303                 const char *what = m->parameters_fragment.what;
 304                 if (!what)
 305                         what = m->parameters_etc_fstab.what;
 306
 307                 if (!m->where)
 308                         if (!(m->where = unit_name_to_path(u->meta.id)))
 309                                 return -ENOMEM;
 310
 311                 path_kill_slashes(m->where);
 312
 313                 /* Minor validity checking */
 314                 if ((m->parameters_fragment.options || m->parameters_fragment.fstype) && !m->parameters_fragment.what)
 315                         return -EBADMSG;
 316
 317                 if (m->parameters_fragment.what)
 318                         m->from_fragment = true;
 319
 320                 if ((r = mount_add_node_links(u, what)) < 0)
 321                         return r;
 322
 323                 if ((r = mount_add_path_links(u, m->where, m->from_etc_fstab || m->from_fragment)) < 0)
 324                         return r;
 325
 326                 if ((r = mount_add_target_links(MOUNT(u))) < 0)
 327                         return r;
 328
 329                 if ((r = unit_add_default_cgroup(u)) < 0)
 330                         return r;
 331         }
 332
 333         return mount_verify(m);
 334 }
 335
 336 static int mount_notify_automount(Mount *m, int status) {
 337         Unit *p;
 338         int r;
 339
 340         assert(m);
 341
 342         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
 343                 return r == -ENOENT ? 0 : r;
 344
 345         return automount_send_ready(AUTOMOUNT(p), status);
 346 }
 347
 348 static void mount_set_state(Mount *m, MountState state) {
 349         MountState old_state;
 350         assert(m);
 351
 352         old_state = m->state;
 353         m->state = state;
 354
 355         if (state != MOUNT_MOUNTING &&
 356             state != MOUNT_MOUNTING_DONE &&
 357             state != MOUNT_REMOUNTING &&
 358             state != MOUNT_UNMOUNTING &&
 359             state != MOUNT_MOUNTING_SIGTERM &&
 360             state != MOUNT_MOUNTING_SIGKILL &&
 361             state != MOUNT_UNMOUNTING_SIGTERM &&
 362             state != MOUNT_UNMOUNTING_SIGKILL &&
 363             state != MOUNT_REMOUNTING_SIGTERM &&
 364             state != MOUNT_REMOUNTING_SIGKILL) {
 365                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
 366                 mount_unwatch_control_pid(m);
 367                 m->control_command = NULL;
 368                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 369         }
 370
 371         if (state == MOUNT_MOUNTED ||
 372             state == MOUNT_REMOUNTING)
 373                 mount_notify_automount(m, 0);
 374         else if (state == MOUNT_DEAD ||
 375                  state == MOUNT_UNMOUNTING ||
 376                  state == MOUNT_MOUNTING_SIGTERM ||
 377                  state == MOUNT_MOUNTING_SIGKILL ||
 378                  state == MOUNT_REMOUNTING_SIGTERM ||
 379                  state == MOUNT_REMOUNTING_SIGKILL ||
 380                  state == MOUNT_UNMOUNTING_SIGTERM ||
 381                  state == MOUNT_UNMOUNTING_SIGKILL ||
 382                  state == MOUNT_MAINTAINANCE)
 383                 mount_notify_automount(m, -ENODEV);
 384
 385         if (state != old_state)
 386                 log_debug("%s changed %s -> %s",
 387                           UNIT(m)->meta.id,
 388                           mount_state_to_string(old_state),
 389                           mount_state_to_string(state));
 390
 391         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
 392 }
 393
 394 static int mount_coldplug(Unit *u) {
 395         Mount *m = MOUNT(u);
 396         MountState new_state = MOUNT_DEAD;
 397         int r;
 398
 399         assert(m);
 400         assert(m->state == MOUNT_DEAD);
 401
 402         if (m->deserialized_state != m->state)
 403                 new_state = m->deserialized_state;
 404         else if (m->from_proc_self_mountinfo)
 405                 new_state = MOUNT_MOUNTED;
 406
 407         if (new_state != m->state) {
 408
 409                 if (new_state == MOUNT_MOUNTING ||
 410                     new_state == MOUNT_MOUNTING_DONE ||
 411                     new_state == MOUNT_REMOUNTING ||
 412                     new_state == MOUNT_UNMOUNTING ||
 413                     new_state == MOUNT_MOUNTING_SIGTERM ||
 414                     new_state == MOUNT_MOUNTING_SIGKILL ||
 415                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
 416                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
 417                     new_state == MOUNT_REMOUNTING_SIGTERM ||
 418                     new_state == MOUNT_REMOUNTING_SIGKILL) {
 419
 420                         if (m->control_pid <= 0)
 421                                 return -EBADMSG;
 422
 423                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
 424                                 return r;
 425
 426                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 427                                 return r;
 428                 }
 429
 430                 mount_set_state(m, new_state);
 431         }
 432
 433         return 0;
 434 }
 435
 436 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
 437         Mount *m = MOUNT(u);
 438         MountParameters *p;
 439
 440         assert(m);
 441         assert(f);
 442
 443         if (m->from_proc_self_mountinfo)
 444                 p = &m->parameters_proc_self_mountinfo;
 445         else if (m->from_fragment)
 446                 p = &m->parameters_fragment;
 447         else
 448                 p = &m->parameters_etc_fstab;
 449
 450         fprintf(f,
 451                 "%sMount State: %s\n"
 452                 "%sWhere: %s\n"
 453                 "%sWhat: %s\n"
 454                 "%sFile System Type: %s\n"
 455                 "%sOptions: %s\n"
 456                 "%sFrom /etc/fstab: %s\n"
 457                 "%sFrom /proc/self/mountinfo: %s\n"
 458                 "%sFrom fragment: %s\n"
 459                 "%sKillMode: %s\n",
 460                 prefix, mount_state_to_string(m->state),
 461                 prefix, m->where,
 462                 prefix, strna(p->what),
 463                 prefix, strna(p->fstype),
 464                 prefix, strna(p->options),
 465                 prefix, yes_no(m->from_etc_fstab),
 466                 prefix, yes_no(m->from_proc_self_mountinfo),
 467                 prefix, yes_no(m->from_fragment),
 468                 prefix, kill_mode_to_string(m->kill_mode));
 469
 470         if (m->control_pid > 0)
 471                 fprintf(f,
 472                         "%sControl PID: %llu\n",
 473                         prefix, (unsigned long long) m->control_pid);
 474
 475         exec_context_dump(&m->exec_context, f, prefix);
 476 }
 477
 478 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 479         pid_t pid;
 480         int r;
 481
 482         assert(m);
 483         assert(c);
 484         assert(_pid);
 485
 486         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 487                 goto fail;
 488
 489         if ((r = exec_spawn(c,
 490                             NULL,
 491                             &m->exec_context,
 492                             NULL, 0,
 493                             true,
 494                             true,
 495                             UNIT(m)->meta.manager->confirm_spawn,
 496                             UNIT(m)->meta.cgroup_bondings,
 497                             &pid)) < 0)
 498                 goto fail;
 499
 500         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 501                 /* FIXME: we need to do something here */
 502                 goto fail;
 503
 504         *_pid = pid;
 505
 506         return 0;
 507
 508 fail:
 509         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 510
 511         return r;
 512 }
 513
 514 static void mount_enter_dead(Mount *m, bool success) {
 515         assert(m);
 516
 517         if (!success)
 518                 m->failure = true;
 519
 520         mount_set_state(m, m->failure ? MOUNT_MAINTAINANCE : MOUNT_DEAD);
 521 }
 522
 523 static void mount_enter_mounted(Mount *m, bool success) {
 524         assert(m);
 525
 526         if (!success)
 527                 m->failure = true;
 528
 529         mount_set_state(m, MOUNT_MOUNTED);
 530 }
 531
 532 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 533         int r;
 534         bool sent = false;
 535
 536         assert(m);
 537
 538         if (!success)
 539                 m->failure = true;
 540
 541         if (m->kill_mode != KILL_NONE) {
 542                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 543                            state == MOUNT_UNMOUNTING_SIGTERM ||
 544                            state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
 545
 546                 if (m->kill_mode == KILL_CONTROL_GROUP) {
 547
 548                         if ((r = cgroup_bonding_kill_list(UNIT(m)->meta.cgroup_bondings, sig)) < 0) {
 549                                 if (r != -EAGAIN && r != -ESRCH)
 550                                         goto fail;
 551                         } else
 552                                 sent = true;
 553                 }
 554
 555                 if (!sent && m->control_pid > 0)
 556                         if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
 557                                 r = -errno;
 558                                 goto fail;
 559                         }
 560         }
 561
 562         if (sent) {
 563                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 564                         goto fail;
 565
 566                 mount_set_state(m, state);
 567         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 568                 mount_enter_mounted(m, true);
 569         else
 570                 mount_enter_dead(m, true);
 571
 572         return;
 573
 574 fail:
 575         log_warning("%s failed to kill processes: %s", UNIT(m)->meta.id, strerror(-r));
 576
 577         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 578                 mount_enter_mounted(m, false);
 579         else
 580                 mount_enter_dead(m, false);
 581 }
 582
 583 static void mount_enter_unmounting(Mount *m, bool success) {
 584         int r;
 585
 586         assert(m);
 587
 588         if (!success)
 589                 m->failure = true;
 590
 591         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 592         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 593
 594         if ((r = exec_command_set(
 595                              m->control_command,
 596                              "/bin/umount",
 597                              m->where,
 598                              NULL)) < 0)
 599                 goto fail;
 600
 601         mount_unwatch_control_pid(m);
 602
 603         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 604                 goto fail;
 605
 606         mount_set_state(m, MOUNT_UNMOUNTING);
 607
 608         return;
 609
 610 fail:
 611         log_warning("%s failed to run umount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
 612         mount_enter_mounted(m, false);
 613 }
 614
 615 static void mount_enter_mounting(Mount *m) {
 616         int r;
 617
 618         assert(m);
 619
 620         m->control_command_id = MOUNT_EXEC_MOUNT;
 621         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 622
 623         if (m->from_fragment)
 624                 r = exec_command_set(
 625                                 m->control_command,
 626                                 "/bin/mount",
 627                                 m->parameters_fragment.what,
 628                                 m->where,
 629                                 "-t", m->parameters_fragment.fstype,
 630                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 631                                 NULL);
 632         else if (m->from_etc_fstab)
 633                 r = exec_command_set(
 634                                 m->control_command,
 635                                 "/bin/mount",
 636                                 m->where,
 637                                 NULL);
 638         else
 639                 r = -ENOENT;
 640
 641         if (r < 0)
 642                 goto fail;
 643
 644         mount_unwatch_control_pid(m);
 645
 646         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 647                 goto fail;
 648
 649         mount_set_state(m, MOUNT_MOUNTING);
 650
 651         return;
 652
 653 fail:
 654         log_warning("%s failed to run mount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
 655         mount_enter_dead(m, false);
 656 }
 657
 658 static void mount_enter_mounting_done(Mount *m) {
 659         assert(m);
 660
 661         mount_set_state(m, MOUNT_MOUNTING_DONE);
 662 }
 663
 664 static void mount_enter_remounting(Mount *m, bool success) {
 665         int r;
 666
 667         assert(m);
 668
 669         if (!success)
 670                 m->failure = true;
 671
 672         m->control_command_id = MOUNT_EXEC_REMOUNT;
 673         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 674
 675         if (m->from_fragment) {
 676                 char *buf = NULL;
 677                 const char *o;
 678
 679                 if (m->parameters_fragment.options) {
 680                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 681                                 r = -ENOMEM;
 682                                 goto fail;
 683                         }
 684
 685                         o = buf;
 686                 } else
 687                         o = "remount";
 688
 689                 r = exec_command_set(
 690                                 m->control_command,
 691                                 "/bin/mount",
 692                                 m->parameters_fragment.what,
 693                                 m->where,
 694                                 "-t", m->parameters_fragment.fstype,
 695                                 "-o", o,
 696                                 NULL);
 697
 698                 free(buf);
 699         } else if (m->from_etc_fstab)
 700                 r = exec_command_set(
 701                                 m->control_command,
 702                                 "/bin/mount",
 703                                 m->where,
 704                                 "-o", "remount",
 705                                 NULL);
 706         else
 707                 r = -ENOENT;
 708
 709         if (r < 0) {
 710                 r = -ENOMEM;
 711                 goto fail;
 712         }
 713
 714         mount_unwatch_control_pid(m);
 715
 716         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 717                 goto fail;
 718
 719         mount_set_state(m, MOUNT_REMOUNTING);
 720
 721         return;
 722
 723 fail:
 724         mount_enter_mounted(m, false);
 725 }
 726
 727 static int mount_start(Unit *u) {
 728         Mount *m = MOUNT(u);
 729
 730         assert(m);
 731
 732         /* We cannot fulfill this request right now, try again later
 733          * please! */
 734         if (m->state == MOUNT_UNMOUNTING ||
 735             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 736             m->state == MOUNT_UNMOUNTING_SIGKILL)
 737                 return -EAGAIN;
 738
 739         /* Already on it! */
 740         if (m->state == MOUNT_MOUNTING ||
 741             m->state == MOUNT_MOUNTING_SIGTERM ||
 742             m->state == MOUNT_MOUNTING_SIGKILL)
 743                 return 0;
 744
 745         assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTAINANCE);
 746
 747         m->failure = false;
 748         mount_enter_mounting(m);
 749         return 0;
 750 }
 751
 752 static int mount_stop(Unit *u) {
 753         Mount *m = MOUNT(u);
 754
 755         assert(m);
 756
 757         /* Cann't do this right now. */
 758         if (m->state == MOUNT_MOUNTING ||
 759             m->state == MOUNT_MOUNTING_DONE ||
 760             m->state == MOUNT_MOUNTING_SIGTERM ||
 761             m->state == MOUNT_MOUNTING_SIGKILL ||
 762             m->state == MOUNT_REMOUNTING ||
 763             m->state == MOUNT_REMOUNTING_SIGTERM ||
 764             m->state == MOUNT_REMOUNTING_SIGKILL)
 765                 return -EAGAIN;
 766
 767         /* Already on it */
 768         if (m->state == MOUNT_UNMOUNTING ||
 769             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 770             m->state == MOUNT_UNMOUNTING_SIGTERM)
 771                 return 0;
 772
 773         assert(m->state == MOUNT_MOUNTED);
 774
 775         mount_enter_unmounting(m, true);
 776         return 0;
 777 }
 778
 779 static int mount_reload(Unit *u) {
 780         Mount *m = MOUNT(u);
 781
 782         assert(m);
 783
 784         if (m->state == MOUNT_MOUNTING_DONE)
 785                 return -EAGAIN;
 786
 787         assert(m->state == MOUNT_MOUNTED);
 788
 789         mount_enter_remounting(m, true);
 790         return 0;
 791 }
 792
 793 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
 794         Mount *m = MOUNT(u);
 795
 796         assert(m);
 797         assert(f);
 798         assert(fds);
 799
 800         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
 801         unit_serialize_item(u, f, "failure", yes_no(m->failure));
 802
 803         if (m->control_pid > 0)
 804                 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) m->control_pid);
 805
 806         if (m->control_command_id >= 0)
 807                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
 808
 809         return 0;
 810 }
 811
 812 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
 813         Mount *m = MOUNT(u);
 814         int r;
 815
 816         assert(u);
 817         assert(key);
 818         assert(value);
 819         assert(fds);
 820
 821         if (streq(key, "state")) {
 822                 MountState state;
 823
 824                 if ((state = mount_state_from_string(value)) < 0)
 825                         log_debug("Failed to parse state value %s", value);
 826                 else
 827                         m->deserialized_state = state;
 828         } else if (streq(key, "failure")) {
 829                 int b;
 830
 831                 if ((b = parse_boolean(value)) < 0)
 832                         log_debug("Failed to parse failure value %s", value);
 833                 else
 834                         m->failure = b || m->failure;
 835
 836         } else if (streq(key, "control-pid")) {
 837                 unsigned pid;
 838
 839                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
 840                         log_debug("Failed to parse control-pid value %s", value);
 841                 else
 842                         m->control_pid = (pid_t) pid;
 843         } else if (streq(key, "control-command")) {
 844                 MountExecCommand id;
 845
 846                 if ((id = mount_exec_command_from_string(value)) < 0)
 847                         log_debug("Failed to parse exec-command value %s", value);
 848                 else {
 849                         m->control_command_id = id;
 850                         m->control_command = m->exec_command + id;
 851                 }
 852
 853         } else
 854                 log_debug("Unknown serialization key '%s'", key);
 855
 856         return 0;
 857 }
 858
 859 static UnitActiveState mount_active_state(Unit *u) {
 860         assert(u);
 861
 862         return state_translation_table[MOUNT(u)->state];
 863 }
 864
 865 static const char *mount_sub_state_to_string(Unit *u) {
 866         assert(u);
 867
 868         return mount_state_to_string(MOUNT(u)->state);
 869 }
 870
 871 static bool mount_check_gc(Unit *u) {
 872         Mount *m = MOUNT(u);
 873
 874         assert(m);
 875
 876         return m->from_etc_fstab || m->from_proc_self_mountinfo;
 877 }
 878
 879 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
 880         Mount *m = MOUNT(u);
 881         bool success;
 882
 883         assert(m);
 884         assert(pid >= 0);
 885
 886         success = code == CLD_EXITED && status == 0;
 887         m->failure = m->failure || !success;
 888
 889         assert(m->control_pid == pid);
 890         m->control_pid = 0;
 891
 892         if (m->control_command) {
 893                 exec_status_fill(&m->control_command->exec_status, pid, code, status);
 894                 m->control_command = NULL;
 895                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 896         }
 897
 898         log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
 899
 900         /* Note that mount(8) returning and the kernel sending us a
 901          * mount table change event might happen out-of-order. If an
 902          * operation succeed we assume the kernel will follow soon too
 903          * and already change into the resulting state.  If it fails
 904          * we check if the kernel still knows about the mount. and
 905          * change state accordingly. */
 906
 907         switch (m->state) {
 908
 909         case MOUNT_MOUNTING:
 910         case MOUNT_MOUNTING_DONE:
 911         case MOUNT_MOUNTING_SIGKILL:
 912         case MOUNT_MOUNTING_SIGTERM:
 913         case MOUNT_REMOUNTING:
 914         case MOUNT_REMOUNTING_SIGKILL:
 915         case MOUNT_REMOUNTING_SIGTERM:
 916
 917                 if (success && m->from_proc_self_mountinfo)
 918                         mount_enter_mounted(m, true);
 919                 else if (m->from_proc_self_mountinfo)
 920                         mount_enter_mounted(m, false);
 921                 else
 922                         mount_enter_dead(m, false);
 923                 break;
 924
 925         case MOUNT_UNMOUNTING:
 926         case MOUNT_UNMOUNTING_SIGKILL:
 927         case MOUNT_UNMOUNTING_SIGTERM:
 928
 929                 if (success)
 930                         mount_enter_dead(m, true);
 931                 else if (m->from_proc_self_mountinfo)
 932                         mount_enter_mounted(m, false);
 933                 else
 934                         mount_enter_dead(m, false);
 935                 break;
 936
 937         default:
 938                 assert_not_reached("Uh, control process died at wrong time.");
 939         }
 940 }
 941
 942 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
 943         Mount *m = MOUNT(u);
 944
 945         assert(m);
 946         assert(elapsed == 1);
 947         assert(w == &m->timer_watch);
 948
 949         switch (m->state) {
 950
 951         case MOUNT_MOUNTING:
 952         case MOUNT_MOUNTING_DONE:
 953                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
 954                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
 955                 break;
 956
 957         case MOUNT_REMOUNTING:
 958                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
 959                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
 960                 break;
 961
 962         case MOUNT_UNMOUNTING:
 963                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
 964                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
 965                 break;
 966
 967         case MOUNT_MOUNTING_SIGTERM:
 968                 log_warning("%s mounting timed out. Killing.", u->meta.id);
 969                 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
 970                 break;
 971
 972         case MOUNT_REMOUNTING_SIGTERM:
 973                 log_warning("%s remounting timed out. Killing.", u->meta.id);
 974                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
 975                 break;
 976
 977         case MOUNT_UNMOUNTING_SIGTERM:
 978                 log_warning("%s unmounting timed out. Killing.", u->meta.id);
 979                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
 980                 break;
 981
 982         case MOUNT_MOUNTING_SIGKILL:
 983         case MOUNT_REMOUNTING_SIGKILL:
 984         case MOUNT_UNMOUNTING_SIGKILL:
 985                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
 986
 987                 if (m->from_proc_self_mountinfo)
 988                         mount_enter_mounted(m, false);
 989                 else
 990                         mount_enter_dead(m, false);
 991                 break;
 992
 993         default:
 994                 assert_not_reached("Timeout at wrong time.");
 995         }
 996 }
 997
 998 static int mount_add_one(
 999                 Manager *m,
1000                 const char *what,
1001                 const char *where,
1002                 const char *options,
1003                 const char *fstype,
1004                 bool from_proc_self_mountinfo,
1005                 bool set_flags) {
1006         int r;
1007         Unit *u;
1008         bool delete;
1009         char *e, *w = NULL, *o = NULL, *f = NULL;
1010         MountParameters *mp;
1011
1012         assert(m);
1013         assert(what);
1014         assert(where);
1015         assert(options);
1016         assert(fstype);
1017
1018         assert(!set_flags || from_proc_self_mountinfo);
1019
1020         /* Ignore API mount points. They should never be referenced in
1021          * dependencies ever. */
1022         if (mount_point_is_api(where))
1023                 return 0;
1024
1025         if (streq(fstype, "autofs"))
1026                 return 0;
1027
1028         /* probably some kind of swap, which we don't cover for now */
1029         if (where[0] != '/')
1030                 return 0;
1031
1032         if (!(e = unit_name_from_path(where, ".mount")))
1033                 return -ENOMEM;
1034
1035         if (!(u = manager_get_unit(m, e))) {
1036                 delete = true;
1037
1038                 if (!(u = unit_new(m))) {
1039                         free(e);
1040                         return -ENOMEM;
1041                 }
1042
1043                 r = unit_add_name(u, e);
1044                 free(e);
1045
1046                 if (r < 0)
1047                         goto fail;
1048
1049                 if (!(MOUNT(u)->where = strdup(where))) {
1050                         r = -ENOMEM;
1051                         goto fail;
1052                 }
1053
1054                 if ((r = unit_set_description(u, where)) < 0)
1055                         goto fail;
1056
1057                 unit_add_to_load_queue(u);
1058         } else {
1059                 delete = false;
1060                 free(e);
1061         }
1062
1063         if (!(w = strdup(what)) ||
1064             !(o = strdup(options)) ||
1065             !(f = strdup(fstype))) {
1066                 r = -ENOMEM;
1067                 goto fail;
1068         }
1069
1070         if (from_proc_self_mountinfo) {
1071                 mp = &MOUNT(u)->parameters_proc_self_mountinfo;
1072
1073                 if (set_flags) {
1074                         MOUNT(u)->is_mounted = true;
1075                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1076                         MOUNT(u)->just_changed = !streq_ptr(MOUNT(u)->parameters_proc_self_mountinfo.options, o);
1077                 }
1078
1079                 MOUNT(u)->from_proc_self_mountinfo = true;
1080
1081         } else {
1082                 mp = &MOUNT(u)->parameters_etc_fstab;
1083
1084                 MOUNT(u)->from_etc_fstab = true;
1085         }
1086
1087         free(mp->what);
1088         mp->what = w;
1089
1090         free(mp->options);
1091         mp->options = o;
1092
1093         free(mp->fstype);
1094         mp->fstype = f;
1095
1096         unit_add_to_dbus_queue(u);
1097
1098         return 0;
1099
1100 fail:
1101         free(w);
1102         free(o);
1103         free(f);
1104
1105         if (delete && u)
1106                 unit_free(u);
1107
1108         return 0;
1109 }
1110
1111 static char *fstab_node_to_udev_node(char *p) {
1112         char *dn, *t;
1113         int r;
1114
1115         /* FIXME: to follow udev's logic 100% we need to leave valid
1116          * UTF8 chars unescaped */
1117
1118         if (startswith(p, "LABEL=")) {
1119
1120                 if (!(t = xescape(p+6, "/ ")))
1121                         return NULL;
1122
1123                 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1124                 free(t);
1125
1126                 if (r < 0)
1127                         return NULL;
1128
1129                 return dn;
1130         }
1131
1132         if (startswith(p, "UUID=")) {
1133
1134                 if (!(t = xescape(p+5, "/ ")))
1135                         return NULL;
1136
1137                 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1138                 free(t);
1139
1140                 if (r < 0)
1141                         return NULL;
1142
1143                 return dn;
1144         }
1145
1146         return strdup(p);
1147 }
1148
1149 static int mount_find_pri(char *options) {
1150         char *end, *pri;
1151         unsigned long r;
1152
1153         if (!(pri = mount_test_option(options, "pri=")))
1154                 return 0;
1155
1156         pri += 4;
1157
1158         errno = 0;
1159         r = strtoul(pri, &end, 10);
1160
1161         if (errno != 0)
1162                 return -errno;
1163
1164         if (end == pri || (*end != ',' && *end != 0))
1165                 return -EINVAL;
1166
1167         return (int) r;
1168 }
1169
1170 static int mount_load_etc_fstab(Manager *m) {
1171         FILE *f;
1172         int r;
1173         struct mntent* me;
1174
1175         assert(m);
1176
1177         errno = 0;
1178         if (!(f = setmntent("/etc/fstab", "r")))
1179                 return -errno;
1180
1181         while ((me = getmntent(f))) {
1182                 char *where, *what;
1183
1184                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1185                         r = -ENOMEM;
1186                         goto finish;
1187                 }
1188
1189                 if (!(where = strdup(me->mnt_dir))) {
1190                         free(what);
1191                         r = -ENOMEM;
1192                         goto finish;
1193                 }
1194
1195                 if (what[0] == '/')
1196                         path_kill_slashes(what);
1197
1198                 if (where[0] == '/')
1199                         path_kill_slashes(where);
1200
1201                 if (streq(me->mnt_type, "swap")) {
1202                         int pri;
1203
1204                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1205                                 r = pri;
1206                         else
1207                                 r = swap_add_one(m,
1208                                                  what,
1209                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1210                                                  pri,
1211                                                  false);
1212                 } else
1213                         r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1214
1215                 free(what);
1216                 free(where);
1217
1218                 if (r < 0)
1219                         goto finish;
1220         }
1221
1222         r = 0;
1223 finish:
1224
1225         endmntent(f);
1226         return r;
1227 }
1228
1229 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1230         int r;
1231         char *device, *path, *options, *fstype, *d, *p;
1232
1233         assert(m);
1234
1235         rewind(m->proc_self_mountinfo);
1236
1237         for (;;) {
1238                 int k;
1239
1240                 device = path = options = fstype = d = p = NULL;
1241
1242                 if ((k = fscanf(m->proc_self_mountinfo,
1243                                 "%*s "       /* (1) mount id */
1244                                 "%*s "       /* (2) parent id */
1245                                 "%*s "       /* (3) major:minor */
1246                                 "%*s "       /* (4) root */
1247                                 "%ms "       /* (5) mount point */
1248                                 "%ms"        /* (6) mount options */
1249                                 "%*[^-]"     /* (7) optional fields */
1250                                 "- "         /* (8) seperator */
1251                                 "%ms "       /* (9) file system type */
1252                                 "%ms"        /* (10) mount source */
1253                                 "%*[^\n]",   /* some rubbish at the end */
1254                                 &path,
1255                                 &options,
1256                                 &fstype,
1257                                 &device)) != 4) {
1258
1259                         if (k == EOF)
1260                                 break;
1261
1262                         r = -EBADMSG;
1263                         goto finish;
1264                 }
1265
1266                 if (!(d = cunescape(device)) ||
1267                     !(p = cunescape(path))) {
1268                         r = -ENOMEM;
1269                         goto finish;
1270                 }
1271
1272                 if ((r = mount_add_one(m, d, p, options, fstype, true, set_flags)) < 0)
1273                         goto finish;
1274
1275                 free(device);
1276                 free(path);
1277                 free(options);
1278                 free(fstype);
1279                 free(d);
1280                 free(p);
1281         }
1282
1283         r = 0;
1284
1285 finish:
1286         free(device);
1287         free(path);
1288         free(options);
1289         free(fstype);
1290         free(d);
1291         free(p);
1292
1293         return r;
1294 }
1295
1296 static void mount_shutdown(Manager *m) {
1297         assert(m);
1298
1299         if (m->proc_self_mountinfo) {
1300                 fclose(m->proc_self_mountinfo);
1301                 m->proc_self_mountinfo = NULL;
1302         }
1303 }
1304
1305 static int mount_enumerate(Manager *m) {
1306         int r;
1307         struct epoll_event ev;
1308         assert(m);
1309
1310         if (!m->proc_self_mountinfo) {
1311                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1312                         return -errno;
1313
1314                 m->mount_watch.type = WATCH_MOUNT;
1315                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1316
1317                 zero(ev);
1318                 ev.events = EPOLLERR;
1319                 ev.data.ptr = &m->mount_watch;
1320
1321                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1322                         return -errno;
1323         }
1324
1325         if ((r = mount_load_etc_fstab(m)) < 0)
1326                 goto fail;
1327
1328         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1329                 goto fail;
1330
1331         return 0;
1332
1333 fail:
1334         mount_shutdown(m);
1335         return r;
1336 }
1337
1338 void mount_fd_event(Manager *m, int events) {
1339         Meta *meta;
1340         int r;
1341
1342         assert(m);
1343         assert(events == EPOLLERR);
1344
1345         /* The manager calls this for every fd event happening on the
1346          * /proc/self/mountinfo file, which informs us about mounting
1347          * table changes */
1348
1349         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1350                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-errno));
1351
1352                 /* Reset flags, just in case, for later calls */
1353                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1354                         Mount *mount = (Mount*) meta;
1355
1356                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1357                 }
1358
1359                 return;
1360         }
1361
1362         manager_dispatch_load_queue(m);
1363
1364         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1365                 Mount *mount = (Mount*) meta;
1366
1367                 if (!mount->is_mounted) {
1368                         /* This has just been unmounted. */
1369
1370                         mount->from_proc_self_mountinfo = false;
1371
1372                         switch (mount->state) {
1373
1374                         case MOUNT_MOUNTED:
1375                                 mount_enter_dead(mount, true);
1376                                 break;
1377
1378                         default:
1379                                 mount_set_state(mount, mount->state);
1380                                 break;
1381
1382                         }
1383
1384                 } else if (mount->just_mounted || mount->just_changed) {
1385
1386                         /* New or changed entrymount */
1387
1388                         switch (mount->state) {
1389
1390                         case MOUNT_DEAD:
1391                         case MOUNT_MAINTAINANCE:
1392                                 mount_enter_mounted(mount, true);
1393                                 break;
1394
1395                         case MOUNT_MOUNTING:
1396                                 mount_enter_mounting_done(mount);
1397                                 break;
1398
1399                         default:
1400                                 /* Nothing really changed, but let's
1401                                  * issue an notification call
1402                                  * nonetheless, in case somebody is
1403                                  * waiting for this. (e.g. file system
1404                                  * ro/rw remounts.) */
1405                                 mount_set_state(mount, mount->state);
1406                                 break;
1407                         }
1408                 }
1409
1410                 /* Reset the flags for later calls */
1411                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1412         }
1413 }
1414
1415 int mount_path_is_mounted(Manager *m, const char* path) {
1416         char *t;
1417         int r;
1418
1419         assert(m);
1420         assert(path);
1421
1422         if (path[0] != '/')
1423                 return 1;
1424
1425         if (!(t = strdup(path)))
1426                 return -ENOMEM;
1427
1428         path_kill_slashes(t);
1429
1430         for (;;) {
1431                 char *e, *slash;
1432                 Unit *u;
1433
1434                 if (!(e = unit_name_from_path(t, ".mount"))) {
1435                         r = -ENOMEM;
1436                         goto finish;
1437                 }
1438
1439                 u = manager_get_unit(m, e);
1440                 free(e);
1441
1442                 if (u &&
1443                     (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1444                     MOUNT(u)->state != MOUNT_MOUNTED) {
1445                         r = 0;
1446                         goto finish;
1447                 }
1448
1449                 assert_se(slash = strrchr(t, '/'));
1450
1451                 if (slash == t) {
1452                         r = 1;
1453                         goto finish;
1454                 }
1455
1456                 *slash = 0;
1457         }
1458
1459         r = 1;
1460
1461 finish:
1462         free(t);
1463         return r;
1464 }
1465
1466 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1467         [MOUNT_DEAD] = "dead",
1468         [MOUNT_MOUNTING] = "mounting",
1469         [MOUNT_MOUNTING_DONE] = "mounting-done",
1470         [MOUNT_MOUNTED] = "mounted",
1471         [MOUNT_REMOUNTING] = "remounting",
1472         [MOUNT_UNMOUNTING] = "unmounting",
1473         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1474         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1475         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1476         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1477         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1478         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1479         [MOUNT_MAINTAINANCE] = "maintainance"
1480 };
1481
1482 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1483
1484 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1485         [MOUNT_EXEC_MOUNT] = "ExecMount",
1486         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1487         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1488 };
1489
1490 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1491
1492 const UnitVTable mount_vtable = {
1493         .suffix = ".mount",
1494
1495         .no_alias = true,
1496         .no_instances = true,
1497         .no_isolate = true,
1498
1499         .init = mount_init,
1500         .load = mount_load,
1501         .done = mount_done,
1502
1503         .coldplug = mount_coldplug,
1504
1505         .dump = mount_dump,
1506
1507         .start = mount_start,
1508         .stop = mount_stop,
1509         .reload = mount_reload,
1510
1511         .serialize = mount_serialize,
1512         .deserialize_item = mount_deserialize_item,
1513
1514         .active_state = mount_active_state,
1515         .sub_state_to_string = mount_sub_state_to_string,
1516
1517         .check_gc = mount_check_gc,
1518
1519         .sigchld_event = mount_sigchld_event,
1520         .timer_event = mount_timer_event,
1521
1522         .bus_message_handler = bus_mount_message_handler,
1523
1524         .enumerate = mount_enumerate,
1525         .shutdown = mount_shutdown
1526 };