src/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_mount_links(Mount *m) {
 117         Meta *other;
 118         int r;
 119
 120         assert(m);
 121
 122         /* Adds in links to other mount points that might lie below or
 123          * above us in the hierarchy */
 124
 125         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
 126                 Mount *n = (Mount*) other;
 127
 128                 if (n == m)
 129                         continue;
 130
 131                 if (n->meta.load_state != UNIT_LOADED)
 132                         continue;
 133
 134                 if (path_startswith(m->where, n->where)) {
 135
 136                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 137                                 return r;
 138
 139                         if (n->from_etc_fstab || n->from_fragment)
 140                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 141                                         return r;
 142
 143                 } else if (path_startswith(n->where, m->where)) {
 144
 145                         if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(n), true)) < 0)
 146                                 return r;
 147
 148                         if (m->from_etc_fstab || m->from_fragment)
 149                                 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 150                                         return r;
 151                 }
 152         }
 153
 154         return 0;
 155 }
 156
 157 static int mount_add_swap_links(Mount *m) {
 158         Meta *other;
 159         int r;
 160
 161         assert(m);
 162
 163         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
 164                 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
 165                         return r;
 166
 167         return 0;
 168 }
 169
 170 static int mount_add_automount_links(Mount *m) {
 171         Meta *other;
 172         int r;
 173
 174         assert(m);
 175
 176         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
 177                 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
 178                         return r;
 179
 180         return 0;
 181 }
 182
 183 static int mount_add_socket_links(Mount *m) {
 184         Meta *other;
 185         int r;
 186
 187         assert(m);
 188
 189         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
 190                 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
 191                         return r;
 192
 193         return 0;
 194 }
 195
 196 static char* mount_test_option(const char *haystack, const char *needle) {
 197         struct mntent me;
 198
 199         assert(needle);
 200
 201         /* Like glibc's hasmntopt(), but works on a string, not a
 202          * struct mntent */
 203
 204         if (!haystack)
 205                 return false;
 206
 207         zero(me);
 208         me.mnt_opts = (char*) haystack;
 209
 210         return hasmntopt(&me, needle);
 211 }
 212
 213 static int mount_add_target_links(Mount *m) {
 214         const char *target;
 215         MountParameters *p;
 216         Unit *tu;
 217         int r;
 218         bool noauto, handle, automount, user;
 219
 220         assert(m);
 221
 222         if (m->from_fragment)
 223                 p = &m->parameters_fragment;
 224         else if (m->from_etc_fstab)
 225                 p = &m->parameters_etc_fstab;
 226         else
 227                 return 0;
 228
 229         noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 230         user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users");
 231         handle = !!mount_test_option(p->options, "comment=systemd.mount");
 232         automount = !!mount_test_option(p->options, "comment=systemd.automount");
 233
 234         if (mount_test_option(p->options, "_netdev") ||
 235             fstype_is_network(p->fstype))
 236                 target = SPECIAL_REMOTE_FS_TARGET;
 237         else
 238                 target = SPECIAL_LOCAL_FS_TARGET;
 239
 240         if ((r = manager_load_unit(UNIT(m)->meta.manager, target, NULL, &tu)) < 0)
 241                 return r;
 242
 243         if (automount && m->meta.manager->running_as != MANAGER_SESSION) {
 244                 Unit *am;
 245
 246                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
 247                         return r;
 248
 249                 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(am), true)) < 0)
 250                         return r;
 251
 252                 return unit_add_dependency(UNIT(am), UNIT_BEFORE, tu, true);
 253
 254         } else {
 255
 256                 if (!noauto && handle)
 257                         if (user || m->meta.manager->running_as != MANAGER_SESSION)
 258                                 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
 259                                         return r;
 260
 261                 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
 262         }
 263 }
 264
 265 static int mount_verify(Mount *m) {
 266         bool b;
 267         char *e;
 268         assert(m);
 269
 270         if (m->meta.load_state != UNIT_LOADED)
 271                 return 0;
 272
 273         if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
 274                 return -ENOENT;
 275
 276         if (!(e = unit_name_from_path(m->where, ".mount")))
 277                 return -ENOMEM;
 278
 279         b = unit_has_name(UNIT(m), e);
 280         free(e);
 281
 282         if (!b) {
 283                 log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->meta.id);
 284                 return -EINVAL;
 285         }
 286
 287         if (m->meta.fragment_path && !m->parameters_fragment.what) {
 288                 log_error("%s's What setting is missing. Refusing.", UNIT(m)->meta.id);
 289                 return -EBADMSG;
 290         }
 291
 292         return 0;
 293 }
 294
 295 static int mount_load(Unit *u) {
 296         Mount *m = MOUNT(u);
 297         int r;
 298
 299         assert(u);
 300         assert(u->meta.load_state == UNIT_STUB);
 301
 302         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
 303                 return r;
 304
 305         /* This is a new unit? Then let's add in some extras */
 306         if (u->meta.load_state == UNIT_LOADED) {
 307                 const char *what = NULL;
 308
 309                 if (m->meta.fragment_path)
 310                         m->from_fragment = true;
 311
 312                 if (!m->where)
 313                         if (!(m->where = unit_name_to_path(u->meta.id)))
 314                                 return -ENOMEM;
 315
 316                 path_kill_slashes(m->where);
 317
 318                 if (!m->meta.description)
 319                         if ((r = unit_set_description(u, m->where)) < 0)
 320                                 return r;
 321
 322                 if (m->from_fragment && m->parameters_fragment.what)
 323                         what = m->parameters_fragment.what;
 324                 else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
 325                         what = m->parameters_etc_fstab.what;
 326                 else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
 327                         what = m->parameters_proc_self_mountinfo.what;
 328
 329                 if (what)
 330                         if ((r = unit_add_node_link(u, what,
 331                                                     (u->meta.manager->running_as == MANAGER_INIT ||
 332                                                      u->meta.manager->running_as == MANAGER_SYSTEM))) < 0)
 333                                 return r;
 334
 335                 if ((r = mount_add_mount_links(m)) < 0)
 336                         return r;
 337
 338                 if ((r = mount_add_socket_links(m)) < 0)
 339                         return r;
 340
 341                 if ((r = mount_add_swap_links(m)) < 0)
 342                         return r;
 343
 344                 if ((r = mount_add_automount_links(m)) < 0)
 345                         return r;
 346
 347                 if ((r = mount_add_target_links(m)) < 0)
 348                         return r;
 349
 350                 if ((r = unit_add_default_cgroup(u)) < 0)
 351                         return r;
 352         }
 353
 354         return mount_verify(m);
 355 }
 356
 357 static int mount_notify_automount(Mount *m, int status) {
 358         Unit *p;
 359         int r;
 360
 361         assert(m);
 362
 363         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
 364                 return r == -ENOENT ? 0 : r;
 365
 366         return automount_send_ready(AUTOMOUNT(p), status);
 367 }
 368
 369 static void mount_set_state(Mount *m, MountState state) {
 370         MountState old_state;
 371         assert(m);
 372
 373         old_state = m->state;
 374         m->state = state;
 375
 376         if (state != MOUNT_MOUNTING &&
 377             state != MOUNT_MOUNTING_DONE &&
 378             state != MOUNT_REMOUNTING &&
 379             state != MOUNT_UNMOUNTING &&
 380             state != MOUNT_MOUNTING_SIGTERM &&
 381             state != MOUNT_MOUNTING_SIGKILL &&
 382             state != MOUNT_UNMOUNTING_SIGTERM &&
 383             state != MOUNT_UNMOUNTING_SIGKILL &&
 384             state != MOUNT_REMOUNTING_SIGTERM &&
 385             state != MOUNT_REMOUNTING_SIGKILL) {
 386                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
 387                 mount_unwatch_control_pid(m);
 388                 m->control_command = NULL;
 389                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 390         }
 391
 392         if (state == MOUNT_MOUNTED ||
 393             state == MOUNT_REMOUNTING)
 394                 mount_notify_automount(m, 0);
 395         else if (state == MOUNT_DEAD ||
 396                  state == MOUNT_UNMOUNTING ||
 397                  state == MOUNT_MOUNTING_SIGTERM ||
 398                  state == MOUNT_MOUNTING_SIGKILL ||
 399                  state == MOUNT_REMOUNTING_SIGTERM ||
 400                  state == MOUNT_REMOUNTING_SIGKILL ||
 401                  state == MOUNT_UNMOUNTING_SIGTERM ||
 402                  state == MOUNT_UNMOUNTING_SIGKILL ||
 403                  state == MOUNT_MAINTAINANCE)
 404                 mount_notify_automount(m, -ENODEV);
 405
 406         if (state != old_state)
 407                 log_debug("%s changed %s -> %s",
 408                           UNIT(m)->meta.id,
 409                           mount_state_to_string(old_state),
 410                           mount_state_to_string(state));
 411
 412         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
 413 }
 414
 415 static int mount_coldplug(Unit *u) {
 416         Mount *m = MOUNT(u);
 417         MountState new_state = MOUNT_DEAD;
 418         int r;
 419
 420         assert(m);
 421         assert(m->state == MOUNT_DEAD);
 422
 423         if (m->deserialized_state != m->state)
 424                 new_state = m->deserialized_state;
 425         else if (m->from_proc_self_mountinfo)
 426                 new_state = MOUNT_MOUNTED;
 427
 428         if (new_state != m->state) {
 429
 430                 if (new_state == MOUNT_MOUNTING ||
 431                     new_state == MOUNT_MOUNTING_DONE ||
 432                     new_state == MOUNT_REMOUNTING ||
 433                     new_state == MOUNT_UNMOUNTING ||
 434                     new_state == MOUNT_MOUNTING_SIGTERM ||
 435                     new_state == MOUNT_MOUNTING_SIGKILL ||
 436                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
 437                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
 438                     new_state == MOUNT_REMOUNTING_SIGTERM ||
 439                     new_state == MOUNT_REMOUNTING_SIGKILL) {
 440
 441                         if (m->control_pid <= 0)
 442                                 return -EBADMSG;
 443
 444                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
 445                                 return r;
 446
 447                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 448                                 return r;
 449                 }
 450
 451                 mount_set_state(m, new_state);
 452         }
 453
 454         return 0;
 455 }
 456
 457 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
 458         Mount *m = MOUNT(u);
 459         MountParameters *p;
 460
 461         assert(m);
 462         assert(f);
 463
 464         if (m->from_proc_self_mountinfo)
 465                 p = &m->parameters_proc_self_mountinfo;
 466         else if (m->from_fragment)
 467                 p = &m->parameters_fragment;
 468         else
 469                 p = &m->parameters_etc_fstab;
 470
 471         fprintf(f,
 472                 "%sMount State: %s\n"
 473                 "%sWhere: %s\n"
 474                 "%sWhat: %s\n"
 475                 "%sFile System Type: %s\n"
 476                 "%sOptions: %s\n"
 477                 "%sFrom /etc/fstab: %s\n"
 478                 "%sFrom /proc/self/mountinfo: %s\n"
 479                 "%sFrom fragment: %s\n"
 480                 "%sKillMode: %s\n",
 481                 prefix, mount_state_to_string(m->state),
 482                 prefix, m->where,
 483                 prefix, strna(p->what),
 484                 prefix, strna(p->fstype),
 485                 prefix, strna(p->options),
 486                 prefix, yes_no(m->from_etc_fstab),
 487                 prefix, yes_no(m->from_proc_self_mountinfo),
 488                 prefix, yes_no(m->from_fragment),
 489                 prefix, kill_mode_to_string(m->kill_mode));
 490
 491         if (m->control_pid > 0)
 492                 fprintf(f,
 493                         "%sControl PID: %llu\n",
 494                         prefix, (unsigned long long) m->control_pid);
 495
 496         exec_context_dump(&m->exec_context, f, prefix);
 497 }
 498
 499 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 500         pid_t pid;
 501         int r;
 502
 503         assert(m);
 504         assert(c);
 505         assert(_pid);
 506
 507         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 508                 goto fail;
 509
 510         if ((r = exec_spawn(c,
 511                             NULL,
 512                             &m->exec_context,
 513                             NULL, 0,
 514                             m->meta.manager->environment,
 515                             true,
 516                             true,
 517                             UNIT(m)->meta.manager->confirm_spawn,
 518                             UNIT(m)->meta.cgroup_bondings,
 519                             &pid)) < 0)
 520                 goto fail;
 521
 522         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 523                 /* FIXME: we need to do something here */
 524                 goto fail;
 525
 526         *_pid = pid;
 527
 528         return 0;
 529
 530 fail:
 531         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 532
 533         return r;
 534 }
 535
 536 static void mount_enter_dead(Mount *m, bool success) {
 537         assert(m);
 538
 539         if (!success)
 540                 m->failure = true;
 541
 542         mount_set_state(m, m->failure ? MOUNT_MAINTAINANCE : MOUNT_DEAD);
 543 }
 544
 545 static void mount_enter_mounted(Mount *m, bool success) {
 546         assert(m);
 547
 548         if (!success)
 549                 m->failure = true;
 550
 551         mount_set_state(m, MOUNT_MOUNTED);
 552 }
 553
 554 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 555         int r;
 556         bool sent = false;
 557
 558         assert(m);
 559
 560         if (!success)
 561                 m->failure = true;
 562
 563         if (m->kill_mode != KILL_NONE) {
 564                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 565                            state == MOUNT_UNMOUNTING_SIGTERM ||
 566                            state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
 567
 568                 if (m->kill_mode == KILL_CONTROL_GROUP) {
 569
 570                         if ((r = cgroup_bonding_kill_list(UNIT(m)->meta.cgroup_bondings, sig)) < 0) {
 571                                 if (r != -EAGAIN && r != -ESRCH)
 572                                         goto fail;
 573                         } else
 574                                 sent = true;
 575                 }
 576
 577                 if (!sent && m->control_pid > 0)
 578                         if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
 579                                 r = -errno;
 580                                 goto fail;
 581                         }
 582         }
 583
 584         if (sent) {
 585                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 586                         goto fail;
 587
 588                 mount_set_state(m, state);
 589         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 590                 mount_enter_mounted(m, true);
 591         else
 592                 mount_enter_dead(m, true);
 593
 594         return;
 595
 596 fail:
 597         log_warning("%s failed to kill processes: %s", UNIT(m)->meta.id, strerror(-r));
 598
 599         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 600                 mount_enter_mounted(m, false);
 601         else
 602                 mount_enter_dead(m, false);
 603 }
 604
 605 static void mount_enter_unmounting(Mount *m, bool success) {
 606         int r;
 607
 608         assert(m);
 609
 610         if (!success)
 611                 m->failure = true;
 612
 613         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 614         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 615
 616         if ((r = exec_command_set(
 617                              m->control_command,
 618                              "/bin/umount",
 619                              m->where,
 620                              NULL)) < 0)
 621                 goto fail;
 622
 623         mount_unwatch_control_pid(m);
 624
 625         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 626                 goto fail;
 627
 628         mount_set_state(m, MOUNT_UNMOUNTING);
 629
 630         return;
 631
 632 fail:
 633         log_warning("%s failed to run umount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
 634         mount_enter_mounted(m, false);
 635 }
 636
 637 static void mount_enter_mounting(Mount *m) {
 638         int r;
 639
 640         assert(m);
 641
 642         m->control_command_id = MOUNT_EXEC_MOUNT;
 643         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 644
 645         if (m->from_fragment)
 646                 r = exec_command_set(
 647                                 m->control_command,
 648                                 "/bin/mount",
 649                                 m->parameters_fragment.what,
 650                                 m->where,
 651                                 "-t", m->parameters_fragment.fstype,
 652                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 653                                 NULL);
 654         else if (m->from_etc_fstab)
 655                 r = exec_command_set(
 656                                 m->control_command,
 657                                 "/bin/mount",
 658                                 m->where,
 659                                 NULL);
 660         else
 661                 r = -ENOENT;
 662
 663         if (r < 0)
 664                 goto fail;
 665
 666         mount_unwatch_control_pid(m);
 667
 668         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 669                 goto fail;
 670
 671         mount_set_state(m, MOUNT_MOUNTING);
 672
 673         return;
 674
 675 fail:
 676         log_warning("%s failed to run mount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
 677         mount_enter_dead(m, false);
 678 }
 679
 680 static void mount_enter_mounting_done(Mount *m) {
 681         assert(m);
 682
 683         mount_set_state(m, MOUNT_MOUNTING_DONE);
 684 }
 685
 686 static void mount_enter_remounting(Mount *m, bool success) {
 687         int r;
 688
 689         assert(m);
 690
 691         if (!success)
 692                 m->failure = true;
 693
 694         m->control_command_id = MOUNT_EXEC_REMOUNT;
 695         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 696
 697         if (m->from_fragment) {
 698                 char *buf = NULL;
 699                 const char *o;
 700
 701                 if (m->parameters_fragment.options) {
 702                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 703                                 r = -ENOMEM;
 704                                 goto fail;
 705                         }
 706
 707                         o = buf;
 708                 } else
 709                         o = "remount";
 710
 711                 r = exec_command_set(
 712                                 m->control_command,
 713                                 "/bin/mount",
 714                                 m->parameters_fragment.what,
 715                                 m->where,
 716                                 "-t", m->parameters_fragment.fstype,
 717                                 "-o", o,
 718                                 NULL);
 719
 720                 free(buf);
 721         } else if (m->from_etc_fstab)
 722                 r = exec_command_set(
 723                                 m->control_command,
 724                                 "/bin/mount",
 725                                 m->where,
 726                                 "-o", "remount",
 727                                 NULL);
 728         else
 729                 r = -ENOENT;
 730
 731         if (r < 0) {
 732                 r = -ENOMEM;
 733                 goto fail;
 734         }
 735
 736         mount_unwatch_control_pid(m);
 737
 738         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 739                 goto fail;
 740
 741         mount_set_state(m, MOUNT_REMOUNTING);
 742
 743         return;
 744
 745 fail:
 746         mount_enter_mounted(m, false);
 747 }
 748
 749 static int mount_start(Unit *u) {
 750         Mount *m = MOUNT(u);
 751
 752         assert(m);
 753
 754         /* We cannot fulfill this request right now, try again later
 755          * please! */
 756         if (m->state == MOUNT_UNMOUNTING ||
 757             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 758             m->state == MOUNT_UNMOUNTING_SIGKILL)
 759                 return -EAGAIN;
 760
 761         /* Already on it! */
 762         if (m->state == MOUNT_MOUNTING ||
 763             m->state == MOUNT_MOUNTING_SIGTERM ||
 764             m->state == MOUNT_MOUNTING_SIGKILL)
 765                 return 0;
 766
 767         assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTAINANCE);
 768
 769         m->failure = false;
 770         mount_enter_mounting(m);
 771         return 0;
 772 }
 773
 774 static int mount_stop(Unit *u) {
 775         Mount *m = MOUNT(u);
 776
 777         assert(m);
 778
 779         /* Cann't do this right now. */
 780         if (m->state == MOUNT_MOUNTING ||
 781             m->state == MOUNT_MOUNTING_DONE ||
 782             m->state == MOUNT_MOUNTING_SIGTERM ||
 783             m->state == MOUNT_MOUNTING_SIGKILL ||
 784             m->state == MOUNT_REMOUNTING ||
 785             m->state == MOUNT_REMOUNTING_SIGTERM ||
 786             m->state == MOUNT_REMOUNTING_SIGKILL)
 787                 return -EAGAIN;
 788
 789         /* Already on it */
 790         if (m->state == MOUNT_UNMOUNTING ||
 791             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 792             m->state == MOUNT_UNMOUNTING_SIGTERM)
 793                 return 0;
 794
 795         assert(m->state == MOUNT_MOUNTED);
 796
 797         mount_enter_unmounting(m, true);
 798         return 0;
 799 }
 800
 801 static int mount_reload(Unit *u) {
 802         Mount *m = MOUNT(u);
 803
 804         assert(m);
 805
 806         if (m->state == MOUNT_MOUNTING_DONE)
 807                 return -EAGAIN;
 808
 809         assert(m->state == MOUNT_MOUNTED);
 810
 811         mount_enter_remounting(m, true);
 812         return 0;
 813 }
 814
 815 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
 816         Mount *m = MOUNT(u);
 817
 818         assert(m);
 819         assert(f);
 820         assert(fds);
 821
 822         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
 823         unit_serialize_item(u, f, "failure", yes_no(m->failure));
 824
 825         if (m->control_pid > 0)
 826                 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) m->control_pid);
 827
 828         if (m->control_command_id >= 0)
 829                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
 830
 831         return 0;
 832 }
 833
 834 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
 835         Mount *m = MOUNT(u);
 836         int r;
 837
 838         assert(u);
 839         assert(key);
 840         assert(value);
 841         assert(fds);
 842
 843         if (streq(key, "state")) {
 844                 MountState state;
 845
 846                 if ((state = mount_state_from_string(value)) < 0)
 847                         log_debug("Failed to parse state value %s", value);
 848                 else
 849                         m->deserialized_state = state;
 850         } else if (streq(key, "failure")) {
 851                 int b;
 852
 853                 if ((b = parse_boolean(value)) < 0)
 854                         log_debug("Failed to parse failure value %s", value);
 855                 else
 856                         m->failure = b || m->failure;
 857
 858         } else if (streq(key, "control-pid")) {
 859                 unsigned pid;
 860
 861                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
 862                         log_debug("Failed to parse control-pid value %s", value);
 863                 else
 864                         m->control_pid = (pid_t) pid;
 865         } else if (streq(key, "control-command")) {
 866                 MountExecCommand id;
 867
 868                 if ((id = mount_exec_command_from_string(value)) < 0)
 869                         log_debug("Failed to parse exec-command value %s", value);
 870                 else {
 871                         m->control_command_id = id;
 872                         m->control_command = m->exec_command + id;
 873                 }
 874
 875         } else
 876                 log_debug("Unknown serialization key '%s'", key);
 877
 878         return 0;
 879 }
 880
 881 static UnitActiveState mount_active_state(Unit *u) {
 882         assert(u);
 883
 884         return state_translation_table[MOUNT(u)->state];
 885 }
 886
 887 static const char *mount_sub_state_to_string(Unit *u) {
 888         assert(u);
 889
 890         return mount_state_to_string(MOUNT(u)->state);
 891 }
 892
 893 static bool mount_check_gc(Unit *u) {
 894         Mount *m = MOUNT(u);
 895
 896         assert(m);
 897
 898         return m->from_etc_fstab || m->from_proc_self_mountinfo;
 899 }
 900
 901 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
 902         Mount *m = MOUNT(u);
 903         bool success;
 904
 905         assert(m);
 906         assert(pid >= 0);
 907
 908         success = is_clean_exit(code, status);
 909         m->failure = m->failure || !success;
 910
 911         assert(m->control_pid == pid);
 912         m->control_pid = 0;
 913
 914         if (m->control_command) {
 915                 exec_status_fill(&m->control_command->exec_status, pid, code, status);
 916                 m->control_command = NULL;
 917                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 918         }
 919
 920         log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
 921
 922         /* Note that mount(8) returning and the kernel sending us a
 923          * mount table change event might happen out-of-order. If an
 924          * operation succeed we assume the kernel will follow soon too
 925          * and already change into the resulting state.  If it fails
 926          * we check if the kernel still knows about the mount. and
 927          * change state accordingly. */
 928
 929         switch (m->state) {
 930
 931         case MOUNT_MOUNTING:
 932         case MOUNT_MOUNTING_DONE:
 933         case MOUNT_MOUNTING_SIGKILL:
 934         case MOUNT_MOUNTING_SIGTERM:
 935         case MOUNT_REMOUNTING:
 936         case MOUNT_REMOUNTING_SIGKILL:
 937         case MOUNT_REMOUNTING_SIGTERM:
 938
 939                 if (success && m->from_proc_self_mountinfo)
 940                         mount_enter_mounted(m, true);
 941                 else if (m->from_proc_self_mountinfo)
 942                         mount_enter_mounted(m, false);
 943                 else
 944                         mount_enter_dead(m, false);
 945                 break;
 946
 947         case MOUNT_UNMOUNTING:
 948         case MOUNT_UNMOUNTING_SIGKILL:
 949         case MOUNT_UNMOUNTING_SIGTERM:
 950
 951                 if (success)
 952                         mount_enter_dead(m, true);
 953                 else if (m->from_proc_self_mountinfo)
 954                         mount_enter_mounted(m, false);
 955                 else
 956                         mount_enter_dead(m, false);
 957                 break;
 958
 959         default:
 960                 assert_not_reached("Uh, control process died at wrong time.");
 961         }
 962 }
 963
 964 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
 965         Mount *m = MOUNT(u);
 966
 967         assert(m);
 968         assert(elapsed == 1);
 969         assert(w == &m->timer_watch);
 970
 971         switch (m->state) {
 972
 973         case MOUNT_MOUNTING:
 974         case MOUNT_MOUNTING_DONE:
 975                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
 976                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
 977                 break;
 978
 979         case MOUNT_REMOUNTING:
 980                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
 981                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
 982                 break;
 983
 984         case MOUNT_UNMOUNTING:
 985                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
 986                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
 987                 break;
 988
 989         case MOUNT_MOUNTING_SIGTERM:
 990                 log_warning("%s mounting timed out. Killing.", u->meta.id);
 991                 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
 992                 break;
 993
 994         case MOUNT_REMOUNTING_SIGTERM:
 995                 log_warning("%s remounting timed out. Killing.", u->meta.id);
 996                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
 997                 break;
 998
 999         case MOUNT_UNMOUNTING_SIGTERM:
1000                 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1001                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1002                 break;
1003
1004         case MOUNT_MOUNTING_SIGKILL:
1005         case MOUNT_REMOUNTING_SIGKILL:
1006         case MOUNT_UNMOUNTING_SIGKILL:
1007                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1008
1009                 if (m->from_proc_self_mountinfo)
1010                         mount_enter_mounted(m, false);
1011                 else
1012                         mount_enter_dead(m, false);
1013                 break;
1014
1015         default:
1016                 assert_not_reached("Timeout at wrong time.");
1017         }
1018 }
1019
1020 static int mount_add_one(
1021                 Manager *m,
1022                 const char *what,
1023                 const char *where,
1024                 const char *options,
1025                 const char *fstype,
1026                 bool from_proc_self_mountinfo,
1027                 bool set_flags) {
1028         int r;
1029         Unit *u;
1030         bool delete;
1031         char *e, *w = NULL, *o = NULL, *f = NULL;
1032         MountParameters *p;
1033
1034         assert(m);
1035         assert(what);
1036         assert(where);
1037         assert(options);
1038         assert(fstype);
1039
1040         assert(!set_flags || from_proc_self_mountinfo);
1041
1042         /* Ignore API mount points. They should never be referenced in
1043          * dependencies ever. */
1044         if (mount_point_is_api(where))
1045                 return 0;
1046
1047         if (streq(fstype, "autofs"))
1048                 return 0;
1049
1050         /* probably some kind of swap, ignore */
1051         if (!is_path(where))
1052                 return 0;
1053
1054         if (!(e = unit_name_from_path(where, ".mount")))
1055                 return -ENOMEM;
1056
1057         if (!(u = manager_get_unit(m, e))) {
1058                 delete = true;
1059
1060                 if (!(u = unit_new(m))) {
1061                         free(e);
1062                         return -ENOMEM;
1063                 }
1064
1065                 r = unit_add_name(u, e);
1066                 free(e);
1067
1068                 if (r < 0)
1069                         goto fail;
1070
1071                 if (!(MOUNT(u)->where = strdup(where))) {
1072                         r = -ENOMEM;
1073                         goto fail;
1074                 }
1075
1076                 unit_add_to_load_queue(u);
1077         } else {
1078                 delete = false;
1079                 free(e);
1080         }
1081
1082         if (!(w = strdup(what)) ||
1083             !(o = strdup(options)) ||
1084             !(f = strdup(fstype))) {
1085                 r = -ENOMEM;
1086                 goto fail;
1087         }
1088
1089         if (from_proc_self_mountinfo) {
1090                 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1091
1092                 if (set_flags) {
1093                         MOUNT(u)->is_mounted = true;
1094                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1095                         MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1096                 }
1097
1098                 MOUNT(u)->from_proc_self_mountinfo = true;
1099         } else {
1100                 p = &MOUNT(u)->parameters_etc_fstab;
1101                 MOUNT(u)->from_etc_fstab = true;
1102         }
1103
1104         free(p->what);
1105         p->what = w;
1106
1107         free(p->options);
1108         p->options = o;
1109
1110         free(p->fstype);
1111         p->fstype = f;
1112
1113         unit_add_to_dbus_queue(u);
1114
1115         return 0;
1116
1117 fail:
1118         free(w);
1119         free(o);
1120         free(f);
1121
1122         if (delete && u)
1123                 unit_free(u);
1124
1125         return r;
1126 }
1127
1128 static char *fstab_node_to_udev_node(char *p) {
1129         char *dn, *t;
1130         int r;
1131
1132         /* FIXME: to follow udev's logic 100% we need to leave valid
1133          * UTF8 chars unescaped */
1134
1135         if (startswith(p, "LABEL=")) {
1136
1137                 if (!(t = xescape(p+6, "/ ")))
1138                         return NULL;
1139
1140                 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1141                 free(t);
1142
1143                 if (r < 0)
1144                         return NULL;
1145
1146                 return dn;
1147         }
1148
1149         if (startswith(p, "UUID=")) {
1150
1151                 if (!(t = xescape(p+5, "/ ")))
1152                         return NULL;
1153
1154                 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1155                 free(t);
1156
1157                 if (r < 0)
1158                         return NULL;
1159
1160                 return dn;
1161         }
1162
1163         return strdup(p);
1164 }
1165
1166 static int mount_find_pri(char *options) {
1167         char *end, *pri;
1168         unsigned long r;
1169
1170         if (!(pri = mount_test_option(options, "pri=")))
1171                 return 0;
1172
1173         pri += 4;
1174
1175         errno = 0;
1176         r = strtoul(pri, &end, 10);
1177
1178         if (errno != 0)
1179                 return -errno;
1180
1181         if (end == pri || (*end != ',' && *end != 0))
1182                 return -EINVAL;
1183
1184         return (int) r;
1185 }
1186
1187 static int mount_load_etc_fstab(Manager *m) {
1188         FILE *f;
1189         int r;
1190         struct mntent* me;
1191
1192         assert(m);
1193
1194         errno = 0;
1195         if (!(f = setmntent("/etc/fstab", "r")))
1196                 return -errno;
1197
1198         while ((me = getmntent(f))) {
1199                 char *where, *what;
1200
1201                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1202                         r = -ENOMEM;
1203                         goto finish;
1204                 }
1205
1206                 if (!(where = strdup(me->mnt_dir))) {
1207                         free(what);
1208                         r = -ENOMEM;
1209                         goto finish;
1210                 }
1211
1212                 if (what[0] == '/')
1213                         path_kill_slashes(what);
1214
1215                 if (where[0] == '/')
1216                         path_kill_slashes(where);
1217
1218                 if (streq(me->mnt_type, "swap")) {
1219                         int pri;
1220
1221                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1222                                 r = pri;
1223                         else
1224                                 r = swap_add_one(m,
1225                                                  what,
1226                                                  pri,
1227                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1228                                                  !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1229                                                  false);
1230                 } else
1231                         r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1232
1233                 free(what);
1234                 free(where);
1235
1236                 if (r < 0)
1237                         goto finish;
1238         }
1239
1240         r = 0;
1241 finish:
1242
1243         endmntent(f);
1244         return r;
1245 }
1246
1247 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1248         int r;
1249         char *device, *path, *options, *fstype, *d, *p;
1250
1251         assert(m);
1252
1253         rewind(m->proc_self_mountinfo);
1254
1255         for (;;) {
1256                 int k;
1257
1258                 device = path = options = fstype = d = p = NULL;
1259
1260                 if ((k = fscanf(m->proc_self_mountinfo,
1261                                 "%*s "       /* (1) mount id */
1262                                 "%*s "       /* (2) parent id */
1263                                 "%*s "       /* (3) major:minor */
1264                                 "%*s "       /* (4) root */
1265                                 "%ms "       /* (5) mount point */
1266                                 "%ms"        /* (6) mount options */
1267                                 "%*[^-]"     /* (7) optional fields */
1268                                 "- "         /* (8) seperator */
1269                                 "%ms "       /* (9) file system type */
1270                                 "%ms"        /* (10) mount source */
1271                                 "%*[^\n]",   /* some rubbish at the end */
1272                                 &path,
1273                                 &options,
1274                                 &fstype,
1275                                 &device)) != 4) {
1276
1277                         if (k == EOF)
1278                                 break;
1279
1280                         r = -EBADMSG;
1281                         goto finish;
1282                 }
1283
1284                 if (!(d = cunescape(device)) ||
1285                     !(p = cunescape(path))) {
1286                         r = -ENOMEM;
1287                         goto finish;
1288                 }
1289
1290                 if ((r = mount_add_one(m, d, p, options, fstype, true, set_flags)) < 0)
1291                         goto finish;
1292
1293                 free(device);
1294                 free(path);
1295                 free(options);
1296                 free(fstype);
1297                 free(d);
1298                 free(p);
1299         }
1300
1301         r = 0;
1302
1303 finish:
1304         free(device);
1305         free(path);
1306         free(options);
1307         free(fstype);
1308         free(d);
1309         free(p);
1310
1311         return r;
1312 }
1313
1314 static void mount_shutdown(Manager *m) {
1315         assert(m);
1316
1317         if (m->proc_self_mountinfo) {
1318                 fclose(m->proc_self_mountinfo);
1319                 m->proc_self_mountinfo = NULL;
1320         }
1321 }
1322
1323 static int mount_enumerate(Manager *m) {
1324         int r;
1325         struct epoll_event ev;
1326         assert(m);
1327
1328         if (!m->proc_self_mountinfo) {
1329                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1330                         return -errno;
1331
1332                 m->mount_watch.type = WATCH_MOUNT;
1333                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1334
1335                 zero(ev);
1336                 ev.events = EPOLLERR;
1337                 ev.data.ptr = &m->mount_watch;
1338
1339                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1340                         return -errno;
1341         }
1342
1343         if ((r = mount_load_etc_fstab(m)) < 0)
1344                 goto fail;
1345
1346         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1347                 goto fail;
1348
1349         return 0;
1350
1351 fail:
1352         mount_shutdown(m);
1353         return r;
1354 }
1355
1356 void mount_fd_event(Manager *m, int events) {
1357         Meta *meta;
1358         int r;
1359
1360         assert(m);
1361         assert(events == EPOLLERR);
1362
1363         /* The manager calls this for every fd event happening on the
1364          * /proc/self/mountinfo file, which informs us about mounting
1365          * table changes */
1366
1367         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1368                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(errno));
1369
1370                 /* Reset flags, just in case, for later calls */
1371                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1372                         Mount *mount = (Mount*) meta;
1373
1374                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1375                 }
1376
1377                 return;
1378         }
1379
1380         manager_dispatch_load_queue(m);
1381
1382         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1383                 Mount *mount = (Mount*) meta;
1384
1385                 if (!mount->is_mounted) {
1386                         /* This has just been unmounted. */
1387
1388                         mount->from_proc_self_mountinfo = false;
1389
1390                         switch (mount->state) {
1391
1392                         case MOUNT_MOUNTED:
1393                                 mount_enter_dead(mount, true);
1394                                 break;
1395
1396                         default:
1397                                 mount_set_state(mount, mount->state);
1398                                 break;
1399
1400                         }
1401
1402                 } else if (mount->just_mounted || mount->just_changed) {
1403
1404                         /* New or changed entrymount */
1405
1406                         switch (mount->state) {
1407
1408                         case MOUNT_DEAD:
1409                         case MOUNT_MAINTAINANCE:
1410                                 mount_enter_mounted(mount, true);
1411                                 break;
1412
1413                         case MOUNT_MOUNTING:
1414                                 mount_enter_mounting_done(mount);
1415                                 break;
1416
1417                         default:
1418                                 /* Nothing really changed, but let's
1419                                  * issue an notification call
1420                                  * nonetheless, in case somebody is
1421                                  * waiting for this. (e.g. file system
1422                                  * ro/rw remounts.) */
1423                                 mount_set_state(mount, mount->state);
1424                                 break;
1425                         }
1426                 }
1427
1428                 /* Reset the flags for later calls */
1429                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1430         }
1431 }
1432
1433 int mount_path_is_mounted(Manager *m, const char* path) {
1434         char *t;
1435         int r;
1436
1437         assert(m);
1438         assert(path);
1439
1440         if (path[0] != '/')
1441                 return 1;
1442
1443         if (!(t = strdup(path)))
1444                 return -ENOMEM;
1445
1446         path_kill_slashes(t);
1447
1448         for (;;) {
1449                 char *e, *slash;
1450                 Unit *u;
1451
1452                 if (!(e = unit_name_from_path(t, ".mount"))) {
1453                         r = -ENOMEM;
1454                         goto finish;
1455                 }
1456
1457                 u = manager_get_unit(m, e);
1458                 free(e);
1459
1460                 if (u &&
1461                     (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1462                     MOUNT(u)->state != MOUNT_MOUNTED) {
1463                         r = 0;
1464                         goto finish;
1465                 }
1466
1467                 assert_se(slash = strrchr(t, '/'));
1468
1469                 if (slash == t) {
1470                         r = 1;
1471                         goto finish;
1472                 }
1473
1474                 *slash = 0;
1475         }
1476
1477         r = 1;
1478
1479 finish:
1480         free(t);
1481         return r;
1482 }
1483
1484 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1485         [MOUNT_DEAD] = "dead",
1486         [MOUNT_MOUNTING] = "mounting",
1487         [MOUNT_MOUNTING_DONE] = "mounting-done",
1488         [MOUNT_MOUNTED] = "mounted",
1489         [MOUNT_REMOUNTING] = "remounting",
1490         [MOUNT_UNMOUNTING] = "unmounting",
1491         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1492         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1493         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1494         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1495         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1496         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1497         [MOUNT_MAINTAINANCE] = "maintainance"
1498 };
1499
1500 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1501
1502 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1503         [MOUNT_EXEC_MOUNT] = "ExecMount",
1504         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1505         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1506 };
1507
1508 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1509
1510 const UnitVTable mount_vtable = {
1511         .suffix = ".mount",
1512
1513         .no_alias = true,
1514         .no_instances = true,
1515         .no_isolate = true,
1516
1517         .init = mount_init,
1518         .load = mount_load,
1519         .done = mount_done,
1520
1521         .coldplug = mount_coldplug,
1522
1523         .dump = mount_dump,
1524
1525         .start = mount_start,
1526         .stop = mount_stop,
1527         .reload = mount_reload,
1528
1529         .serialize = mount_serialize,
1530         .deserialize_item = mount_deserialize_item,
1531
1532         .active_state = mount_active_state,
1533         .sub_state_to_string = mount_sub_state_to_string,
1534
1535         .check_gc = mount_check_gc,
1536
1537         .sigchld_event = mount_sigchld_event,
1538         .timer_event = mount_timer_event,
1539
1540         .bus_message_handler = bus_mount_message_handler,
1541
1542         .enumerate = mount_enumerate,
1543         .shutdown = mount_shutdown
1544 };