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 #include "special.h"
  39
  40 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
  41         [MOUNT_DEAD] = UNIT_INACTIVE,
  42         [MOUNT_MOUNTING] = UNIT_ACTIVATING,
  43         [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
  44         [MOUNT_MOUNTED] = UNIT_ACTIVE,
  45         [MOUNT_REMOUNTING] = UNIT_RELOADING,
  46         [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
  47         [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  48         [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  49         [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
  50         [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
  51         [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  52         [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  53         [MOUNT_MAINTENANCE] = UNIT_MAINTENANCE
  54 };
  55
  56 static void mount_init(Unit *u) {
  57         Mount *m = MOUNT(u);
  58
  59         assert(u);
  60         assert(u->meta.load_state == UNIT_STUB);
  61
  62         m->timeout_usec = DEFAULT_TIMEOUT_USEC;
  63         exec_context_init(&m->exec_context);
  64
  65         m->directory_mode = 0755;
  66
  67         /* We need to make sure that /bin/mount is always called in
  68          * the same process group as us, so that the autofs kernel
  69          * side doesn't send us another mount request while we are
  70          * already trying to comply its last one. */
  71         m->exec_context.same_pgrp = true;
  72
  73         m->timer_watch.type = WATCH_INVALID;
  74
  75         m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
  76 }
  77
  78 static void mount_unwatch_control_pid(Mount *m) {
  79         assert(m);
  80
  81         if (m->control_pid <= 0)
  82                 return;
  83
  84         unit_unwatch_pid(UNIT(m), m->control_pid);
  85         m->control_pid = 0;
  86 }
  87
  88 static void mount_parameters_done(MountParameters *p) {
  89         assert(p);
  90
  91         free(p->what);
  92         free(p->options);
  93         free(p->fstype);
  94
  95         p->what = p->options = p->fstype = NULL;
  96 }
  97
  98 static void mount_done(Unit *u) {
  99         Mount *m = MOUNT(u);
 100
 101         assert(m);
 102
 103         free(m->where);
 104         m->where = NULL;
 105
 106         mount_parameters_done(&m->parameters_etc_fstab);
 107         mount_parameters_done(&m->parameters_proc_self_mountinfo);
 108         mount_parameters_done(&m->parameters_fragment);
 109
 110         exec_context_done(&m->exec_context);
 111         exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
 112         m->control_command = NULL;
 113
 114         mount_unwatch_control_pid(m);
 115
 116         unit_unwatch_timer(u, &m->timer_watch);
 117 }
 118
 119 static int mount_add_mount_links(Mount *m) {
 120         Meta *other;
 121         int r;
 122
 123         assert(m);
 124
 125         /* Adds in links to other mount points that might lie below or
 126          * above us in the hierarchy */
 127
 128         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
 129                 Mount *n = (Mount*) other;
 130
 131                 if (n == m)
 132                         continue;
 133
 134                 if (n->meta.load_state != UNIT_LOADED)
 135                         continue;
 136
 137                 if (path_startswith(m->where, n->where)) {
 138
 139                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 140                                 return r;
 141
 142                         if (n->from_etc_fstab || n->from_fragment)
 143                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 144                                         return r;
 145
 146                 } else if (path_startswith(n->where, m->where)) {
 147
 148                         if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(n), true)) < 0)
 149                                 return r;
 150
 151                         if (m->from_etc_fstab || m->from_fragment)
 152                                 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 153                                         return r;
 154                 }
 155         }
 156
 157         return 0;
 158 }
 159
 160 static int mount_add_swap_links(Mount *m) {
 161         Meta *other;
 162         int r;
 163
 164         assert(m);
 165
 166         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
 167                 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
 168                         return r;
 169
 170         return 0;
 171 }
 172
 173 static int mount_add_path_links(Mount *m) {
 174         Meta *other;
 175         int r;
 176
 177         assert(m);
 178
 179         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
 180                 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
 181                         return r;
 182
 183         return 0;
 184 }
 185
 186 static int mount_add_automount_links(Mount *m) {
 187         Meta *other;
 188         int r;
 189
 190         assert(m);
 191
 192         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
 193                 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
 194                         return r;
 195
 196         return 0;
 197 }
 198
 199 static int mount_add_socket_links(Mount *m) {
 200         Meta *other;
 201         int r;
 202
 203         assert(m);
 204
 205         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
 206                 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
 207                         return r;
 208
 209         return 0;
 210 }
 211
 212 static char* mount_test_option(const char *haystack, const char *needle) {
 213         struct mntent me;
 214
 215         assert(needle);
 216
 217         /* Like glibc's hasmntopt(), but works on a string, not a
 218          * struct mntent */
 219
 220         if (!haystack)
 221                 return false;
 222
 223         zero(me);
 224         me.mnt_opts = (char*) haystack;
 225
 226         return hasmntopt(&me, needle);
 227 }
 228
 229 static int mount_add_target_links(Mount *m) {
 230         const char *target;
 231         MountParameters *p;
 232         Unit *tu;
 233         int r;
 234         bool noauto, handle, automount, user;
 235
 236         assert(m);
 237
 238         if (m->from_fragment)
 239                 p = &m->parameters_fragment;
 240         else if (m->from_etc_fstab)
 241                 p = &m->parameters_etc_fstab;
 242         else
 243                 return 0;
 244
 245         noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 246         user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users");
 247         handle = !!mount_test_option(p->options, "comment=systemd.mount");
 248         automount = !!mount_test_option(p->options, "comment=systemd.automount");
 249
 250         if (mount_test_option(p->options, "_netdev") ||
 251             fstype_is_network(p->fstype))
 252                 target = SPECIAL_REMOTE_FS_TARGET;
 253         else
 254                 target = SPECIAL_LOCAL_FS_TARGET;
 255
 256         if ((r = manager_load_unit(m->meta.manager, target, NULL, &tu)) < 0)
 257                 return r;
 258
 259         if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
 260                 Unit *am;
 261
 262                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
 263                         return r;
 264
 265                 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
 266         } else {
 267
 268                 if (!noauto && handle)
 269                         if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
 270                                 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
 271                                         return r;
 272
 273                 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
 274         }
 275 }
 276
 277 static int mount_verify(Mount *m) {
 278         bool b;
 279         char *e;
 280         assert(m);
 281
 282         if (m->meta.load_state != UNIT_LOADED)
 283                 return 0;
 284
 285         if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
 286                 return -ENOENT;
 287
 288         if (!(e = unit_name_from_path(m->where, ".mount")))
 289                 return -ENOMEM;
 290
 291         b = unit_has_name(UNIT(m), e);
 292         free(e);
 293
 294         if (!b) {
 295                 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
 296                 return -EINVAL;
 297         }
 298
 299         if (m->meta.fragment_path && !m->parameters_fragment.what) {
 300                 log_error("%s's What setting is missing. Refusing.", m->meta.id);
 301                 return -EBADMSG;
 302         }
 303
 304         if (m->exec_context.pam_name && m->kill_mode != KILL_CONTROL_GROUP) {
 305                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
 306                 return -EINVAL;
 307         }
 308
 309         return 0;
 310 }
 311
 312 static int mount_load(Unit *u) {
 313         Mount *m = MOUNT(u);
 314         int r;
 315
 316         assert(u);
 317         assert(u->meta.load_state == UNIT_STUB);
 318
 319         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
 320                 return r;
 321
 322         /* This is a new unit? Then let's add in some extras */
 323         if (u->meta.load_state == UNIT_LOADED) {
 324                 const char *what = NULL;
 325
 326                 if (m->meta.fragment_path)
 327                         m->from_fragment = true;
 328
 329                 if (!m->where)
 330                         if (!(m->where = unit_name_to_path(u->meta.id)))
 331                                 return -ENOMEM;
 332
 333                 path_kill_slashes(m->where);
 334
 335                 if (!m->meta.description)
 336                         if ((r = unit_set_description(u, m->where)) < 0)
 337                                 return r;
 338
 339                 if (m->from_fragment && m->parameters_fragment.what)
 340                         what = m->parameters_fragment.what;
 341                 else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
 342                         what = m->parameters_etc_fstab.what;
 343                 else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
 344                         what = m->parameters_proc_self_mountinfo.what;
 345
 346                 if (what)
 347                         if ((r = unit_add_node_link(u, what, u->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
 348                                 return r;
 349
 350                 if ((r = mount_add_mount_links(m)) < 0)
 351                         return r;
 352
 353                 if ((r = mount_add_socket_links(m)) < 0)
 354                         return r;
 355
 356                 if ((r = mount_add_swap_links(m)) < 0)
 357                         return r;
 358
 359                 if ((r = mount_add_path_links(m)) < 0)
 360                         return r;
 361
 362                 if ((r = mount_add_automount_links(m)) < 0)
 363                         return r;
 364
 365                 if ((r = mount_add_target_links(m)) < 0)
 366                         return r;
 367
 368                 if ((r = unit_add_default_cgroup(u)) < 0)
 369                         return r;
 370         }
 371
 372         return mount_verify(m);
 373 }
 374
 375 static int mount_notify_automount(Mount *m, int status) {
 376         Unit *p;
 377         int r;
 378
 379         assert(m);
 380
 381         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
 382                 return r == -ENOENT ? 0 : r;
 383
 384         return automount_send_ready(AUTOMOUNT(p), status);
 385 }
 386
 387 static void mount_set_state(Mount *m, MountState state) {
 388         MountState old_state;
 389         assert(m);
 390
 391         old_state = m->state;
 392         m->state = state;
 393
 394         if (state != MOUNT_MOUNTING &&
 395             state != MOUNT_MOUNTING_DONE &&
 396             state != MOUNT_REMOUNTING &&
 397             state != MOUNT_UNMOUNTING &&
 398             state != MOUNT_MOUNTING_SIGTERM &&
 399             state != MOUNT_MOUNTING_SIGKILL &&
 400             state != MOUNT_UNMOUNTING_SIGTERM &&
 401             state != MOUNT_UNMOUNTING_SIGKILL &&
 402             state != MOUNT_REMOUNTING_SIGTERM &&
 403             state != MOUNT_REMOUNTING_SIGKILL) {
 404                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
 405                 mount_unwatch_control_pid(m);
 406                 m->control_command = NULL;
 407                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 408         }
 409
 410         if (state == MOUNT_MOUNTED ||
 411             state == MOUNT_REMOUNTING)
 412                 mount_notify_automount(m, 0);
 413         else if (state == MOUNT_DEAD ||
 414                  state == MOUNT_UNMOUNTING ||
 415                  state == MOUNT_MOUNTING_SIGTERM ||
 416                  state == MOUNT_MOUNTING_SIGKILL ||
 417                  state == MOUNT_REMOUNTING_SIGTERM ||
 418                  state == MOUNT_REMOUNTING_SIGKILL ||
 419                  state == MOUNT_UNMOUNTING_SIGTERM ||
 420                  state == MOUNT_UNMOUNTING_SIGKILL ||
 421                  state == MOUNT_MAINTENANCE)
 422                 mount_notify_automount(m, -ENODEV);
 423
 424         if (state != old_state)
 425                 log_debug("%s changed %s -> %s",
 426                           m->meta.id,
 427                           mount_state_to_string(old_state),
 428                           mount_state_to_string(state));
 429
 430         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
 431 }
 432
 433 static int mount_coldplug(Unit *u) {
 434         Mount *m = MOUNT(u);
 435         MountState new_state = MOUNT_DEAD;
 436         int r;
 437
 438         assert(m);
 439         assert(m->state == MOUNT_DEAD);
 440
 441         if (m->deserialized_state != m->state)
 442                 new_state = m->deserialized_state;
 443         else if (m->from_proc_self_mountinfo)
 444                 new_state = MOUNT_MOUNTED;
 445
 446         if (new_state != m->state) {
 447
 448                 if (new_state == MOUNT_MOUNTING ||
 449                     new_state == MOUNT_MOUNTING_DONE ||
 450                     new_state == MOUNT_REMOUNTING ||
 451                     new_state == MOUNT_UNMOUNTING ||
 452                     new_state == MOUNT_MOUNTING_SIGTERM ||
 453                     new_state == MOUNT_MOUNTING_SIGKILL ||
 454                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
 455                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
 456                     new_state == MOUNT_REMOUNTING_SIGTERM ||
 457                     new_state == MOUNT_REMOUNTING_SIGKILL) {
 458
 459                         if (m->control_pid <= 0)
 460                                 return -EBADMSG;
 461
 462                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
 463                                 return r;
 464
 465                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 466                                 return r;
 467                 }
 468
 469                 mount_set_state(m, new_state);
 470         }
 471
 472         return 0;
 473 }
 474
 475 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
 476         Mount *m = MOUNT(u);
 477         MountParameters *p;
 478
 479         assert(m);
 480         assert(f);
 481
 482         if (m->from_proc_self_mountinfo)
 483                 p = &m->parameters_proc_self_mountinfo;
 484         else if (m->from_fragment)
 485                 p = &m->parameters_fragment;
 486         else
 487                 p = &m->parameters_etc_fstab;
 488
 489         fprintf(f,
 490                 "%sMount State: %s\n"
 491                 "%sWhere: %s\n"
 492                 "%sWhat: %s\n"
 493                 "%sFile System Type: %s\n"
 494                 "%sOptions: %s\n"
 495                 "%sFrom /etc/fstab: %s\n"
 496                 "%sFrom /proc/self/mountinfo: %s\n"
 497                 "%sFrom fragment: %s\n"
 498                 "%sKillMode: %s\n"
 499                 "%sDirectoryMode: %04o\n",
 500                 prefix, mount_state_to_string(m->state),
 501                 prefix, m->where,
 502                 prefix, strna(p->what),
 503                 prefix, strna(p->fstype),
 504                 prefix, strna(p->options),
 505                 prefix, yes_no(m->from_etc_fstab),
 506                 prefix, yes_no(m->from_proc_self_mountinfo),
 507                 prefix, yes_no(m->from_fragment),
 508                 prefix, kill_mode_to_string(m->kill_mode),
 509                 prefix, m->directory_mode);
 510
 511         if (m->control_pid > 0)
 512                 fprintf(f,
 513                         "%sControl PID: %lu\n",
 514                         prefix, (unsigned long) m->control_pid);
 515
 516         exec_context_dump(&m->exec_context, f, prefix);
 517 }
 518
 519 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 520         pid_t pid;
 521         int r;
 522
 523         assert(m);
 524         assert(c);
 525         assert(_pid);
 526
 527         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 528                 goto fail;
 529
 530         if ((r = exec_spawn(c,
 531                             NULL,
 532                             &m->exec_context,
 533                             NULL, 0,
 534                             m->meta.manager->environment,
 535                             true,
 536                             true,
 537                             m->meta.manager->confirm_spawn,
 538                             m->meta.cgroup_bondings,
 539                             &pid)) < 0)
 540                 goto fail;
 541
 542         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 543                 /* FIXME: we need to do something here */
 544                 goto fail;
 545
 546         *_pid = pid;
 547
 548         return 0;
 549
 550 fail:
 551         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 552
 553         return r;
 554 }
 555
 556 static void mount_enter_dead(Mount *m, bool success) {
 557         assert(m);
 558
 559         if (!success)
 560                 m->failure = true;
 561
 562         mount_set_state(m, m->failure ? MOUNT_MAINTENANCE : MOUNT_DEAD);
 563 }
 564
 565 static void mount_enter_mounted(Mount *m, bool success) {
 566         assert(m);
 567
 568         if (!success)
 569                 m->failure = true;
 570
 571         mount_set_state(m, MOUNT_MOUNTED);
 572 }
 573
 574 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 575         int r;
 576         bool sent = false;
 577
 578         assert(m);
 579
 580         if (!success)
 581                 m->failure = true;
 582
 583         if (m->kill_mode != KILL_NONE) {
 584                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 585                            state == MOUNT_UNMOUNTING_SIGTERM ||
 586                            state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
 587
 588                 if (m->kill_mode == KILL_CONTROL_GROUP) {
 589
 590                         if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig)) < 0) {
 591                                 if (r != -EAGAIN && r != -ESRCH)
 592                                         goto fail;
 593                         } else
 594                                 sent = true;
 595                 }
 596
 597                 if (!sent && m->control_pid > 0)
 598                         if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
 599                                 r = -errno;
 600                                 goto fail;
 601                         }
 602         }
 603
 604         if (sent) {
 605                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 606                         goto fail;
 607
 608                 mount_set_state(m, state);
 609         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 610                 mount_enter_mounted(m, true);
 611         else
 612                 mount_enter_dead(m, true);
 613
 614         return;
 615
 616 fail:
 617         log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
 618
 619         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 620                 mount_enter_mounted(m, false);
 621         else
 622                 mount_enter_dead(m, false);
 623 }
 624
 625 static void mount_enter_unmounting(Mount *m, bool success) {
 626         int r;
 627
 628         assert(m);
 629
 630         if (!success)
 631                 m->failure = true;
 632
 633         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 634         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 635
 636         if ((r = exec_command_set(
 637                              m->control_command,
 638                              "/bin/umount",
 639                              m->where,
 640                              NULL)) < 0)
 641                 goto fail;
 642
 643         mount_unwatch_control_pid(m);
 644
 645         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 646                 goto fail;
 647
 648         mount_set_state(m, MOUNT_UNMOUNTING);
 649
 650         return;
 651
 652 fail:
 653         log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
 654         mount_enter_mounted(m, false);
 655 }
 656
 657 static void mount_enter_mounting(Mount *m) {
 658         int r;
 659
 660         assert(m);
 661
 662         m->control_command_id = MOUNT_EXEC_MOUNT;
 663         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 664
 665         mkdir_p(m->where, m->directory_mode);
 666
 667         if (m->from_fragment)
 668                 r = exec_command_set(
 669                                 m->control_command,
 670                                 "/bin/mount",
 671                                 m->parameters_fragment.what,
 672                                 m->where,
 673                                 "-t", m->parameters_fragment.fstype,
 674                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 675                                 NULL);
 676         else if (m->from_etc_fstab)
 677                 r = exec_command_set(
 678                                 m->control_command,
 679                                 "/bin/mount",
 680                                 m->where,
 681                                 NULL);
 682         else
 683                 r = -ENOENT;
 684
 685         if (r < 0)
 686                 goto fail;
 687
 688         mount_unwatch_control_pid(m);
 689
 690         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 691                 goto fail;
 692
 693         mount_set_state(m, MOUNT_MOUNTING);
 694
 695         return;
 696
 697 fail:
 698         log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
 699         mount_enter_dead(m, false);
 700 }
 701
 702 static void mount_enter_mounting_done(Mount *m) {
 703         assert(m);
 704
 705         mount_set_state(m, MOUNT_MOUNTING_DONE);
 706 }
 707
 708 static void mount_enter_remounting(Mount *m, bool success) {
 709         int r;
 710
 711         assert(m);
 712
 713         if (!success)
 714                 m->failure = true;
 715
 716         m->control_command_id = MOUNT_EXEC_REMOUNT;
 717         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 718
 719         if (m->from_fragment) {
 720                 char *buf = NULL;
 721                 const char *o;
 722
 723                 if (m->parameters_fragment.options) {
 724                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 725                                 r = -ENOMEM;
 726                                 goto fail;
 727                         }
 728
 729                         o = buf;
 730                 } else
 731                         o = "remount";
 732
 733                 r = exec_command_set(
 734                                 m->control_command,
 735                                 "/bin/mount",
 736                                 m->parameters_fragment.what,
 737                                 m->where,
 738                                 "-t", m->parameters_fragment.fstype,
 739                                 "-o", o,
 740                                 NULL);
 741
 742                 free(buf);
 743         } else if (m->from_etc_fstab)
 744                 r = exec_command_set(
 745                                 m->control_command,
 746                                 "/bin/mount",
 747                                 m->where,
 748                                 "-o", "remount",
 749                                 NULL);
 750         else
 751                 r = -ENOENT;
 752
 753         if (r < 0) {
 754                 r = -ENOMEM;
 755                 goto fail;
 756         }
 757
 758         mount_unwatch_control_pid(m);
 759
 760         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 761                 goto fail;
 762
 763         mount_set_state(m, MOUNT_REMOUNTING);
 764
 765         return;
 766
 767 fail:
 768         mount_enter_mounted(m, false);
 769 }
 770
 771 static int mount_start(Unit *u) {
 772         Mount *m = MOUNT(u);
 773
 774         assert(m);
 775
 776         /* We cannot fulfill this request right now, try again later
 777          * please! */
 778         if (m->state == MOUNT_UNMOUNTING ||
 779             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 780             m->state == MOUNT_UNMOUNTING_SIGKILL)
 781                 return -EAGAIN;
 782
 783         /* Already on it! */
 784         if (m->state == MOUNT_MOUNTING ||
 785             m->state == MOUNT_MOUNTING_SIGTERM ||
 786             m->state == MOUNT_MOUNTING_SIGKILL)
 787                 return 0;
 788
 789         assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTENANCE);
 790
 791         m->failure = false;
 792         mount_enter_mounting(m);
 793         return 0;
 794 }
 795
 796 static int mount_stop(Unit *u) {
 797         Mount *m = MOUNT(u);
 798
 799         assert(m);
 800
 801         /* Cann't do this right now. */
 802         if (m->state == MOUNT_MOUNTING ||
 803             m->state == MOUNT_MOUNTING_DONE ||
 804             m->state == MOUNT_MOUNTING_SIGTERM ||
 805             m->state == MOUNT_MOUNTING_SIGKILL ||
 806             m->state == MOUNT_REMOUNTING ||
 807             m->state == MOUNT_REMOUNTING_SIGTERM ||
 808             m->state == MOUNT_REMOUNTING_SIGKILL)
 809                 return -EAGAIN;
 810
 811         /* Already on it */
 812         if (m->state == MOUNT_UNMOUNTING ||
 813             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 814             m->state == MOUNT_UNMOUNTING_SIGTERM)
 815                 return 0;
 816
 817         assert(m->state == MOUNT_MOUNTED);
 818
 819         mount_enter_unmounting(m, true);
 820         return 0;
 821 }
 822
 823 static int mount_reload(Unit *u) {
 824         Mount *m = MOUNT(u);
 825
 826         assert(m);
 827
 828         if (m->state == MOUNT_MOUNTING_DONE)
 829                 return -EAGAIN;
 830
 831         assert(m->state == MOUNT_MOUNTED);
 832
 833         mount_enter_remounting(m, true);
 834         return 0;
 835 }
 836
 837 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
 838         Mount *m = MOUNT(u);
 839
 840         assert(m);
 841         assert(f);
 842         assert(fds);
 843
 844         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
 845         unit_serialize_item(u, f, "failure", yes_no(m->failure));
 846
 847         if (m->control_pid > 0)
 848                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
 849
 850         if (m->control_command_id >= 0)
 851                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
 852
 853         return 0;
 854 }
 855
 856 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
 857         Mount *m = MOUNT(u);
 858         int r;
 859
 860         assert(u);
 861         assert(key);
 862         assert(value);
 863         assert(fds);
 864
 865         if (streq(key, "state")) {
 866                 MountState state;
 867
 868                 if ((state = mount_state_from_string(value)) < 0)
 869                         log_debug("Failed to parse state value %s", value);
 870                 else
 871                         m->deserialized_state = state;
 872         } else if (streq(key, "failure")) {
 873                 int b;
 874
 875                 if ((b = parse_boolean(value)) < 0)
 876                         log_debug("Failed to parse failure value %s", value);
 877                 else
 878                         m->failure = b || m->failure;
 879
 880         } else if (streq(key, "control-pid")) {
 881                 pid_t pid;
 882
 883                 if ((r = parse_pid(value, &pid)) < 0)
 884                         log_debug("Failed to parse control-pid value %s", value);
 885                 else
 886                         m->control_pid = pid;
 887         } else if (streq(key, "control-command")) {
 888                 MountExecCommand id;
 889
 890                 if ((id = mount_exec_command_from_string(value)) < 0)
 891                         log_debug("Failed to parse exec-command value %s", value);
 892                 else {
 893                         m->control_command_id = id;
 894                         m->control_command = m->exec_command + id;
 895                 }
 896
 897         } else
 898                 log_debug("Unknown serialization key '%s'", key);
 899
 900         return 0;
 901 }
 902
 903 static UnitActiveState mount_active_state(Unit *u) {
 904         assert(u);
 905
 906         return state_translation_table[MOUNT(u)->state];
 907 }
 908
 909 static const char *mount_sub_state_to_string(Unit *u) {
 910         assert(u);
 911
 912         return mount_state_to_string(MOUNT(u)->state);
 913 }
 914
 915 static bool mount_check_gc(Unit *u) {
 916         Mount *m = MOUNT(u);
 917
 918         assert(m);
 919
 920         return m->from_etc_fstab || m->from_proc_self_mountinfo;
 921 }
 922
 923 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
 924         Mount *m = MOUNT(u);
 925         bool success;
 926
 927         assert(m);
 928         assert(pid >= 0);
 929
 930         if (pid != m->control_pid)
 931                 return;
 932
 933         m->control_pid = 0;
 934
 935         success = is_clean_exit(code, status);
 936         m->failure = m->failure || !success;
 937
 938         if (m->control_command) {
 939                 exec_status_exit(&m->control_command->exec_status, pid, code, status);
 940                 m->control_command = NULL;
 941                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 942         }
 943
 944         log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
 945
 946         /* Note that mount(8) returning and the kernel sending us a
 947          * mount table change event might happen out-of-order. If an
 948          * operation succeed we assume the kernel will follow soon too
 949          * and already change into the resulting state.  If it fails
 950          * we check if the kernel still knows about the mount. and
 951          * change state accordingly. */
 952
 953         switch (m->state) {
 954
 955         case MOUNT_MOUNTING:
 956         case MOUNT_MOUNTING_DONE:
 957         case MOUNT_MOUNTING_SIGKILL:
 958         case MOUNT_MOUNTING_SIGTERM:
 959         case MOUNT_REMOUNTING:
 960         case MOUNT_REMOUNTING_SIGKILL:
 961         case MOUNT_REMOUNTING_SIGTERM:
 962
 963                 if (success)
 964                         mount_enter_mounted(m, true);
 965                 else if (m->from_proc_self_mountinfo)
 966                         mount_enter_mounted(m, false);
 967                 else
 968                         mount_enter_dead(m, false);
 969                 break;
 970
 971         case MOUNT_UNMOUNTING:
 972         case MOUNT_UNMOUNTING_SIGKILL:
 973         case MOUNT_UNMOUNTING_SIGTERM:
 974
 975                 if (success)
 976                         mount_enter_dead(m, true);
 977                 else if (m->from_proc_self_mountinfo)
 978                         mount_enter_mounted(m, false);
 979                 else
 980                         mount_enter_dead(m, false);
 981                 break;
 982
 983         default:
 984                 assert_not_reached("Uh, control process died at wrong time.");
 985         }
 986 }
 987
 988 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
 989         Mount *m = MOUNT(u);
 990
 991         assert(m);
 992         assert(elapsed == 1);
 993         assert(w == &m->timer_watch);
 994
 995         switch (m->state) {
 996
 997         case MOUNT_MOUNTING:
 998         case MOUNT_MOUNTING_DONE:
 999                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1000                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1001                 break;
1002
1003         case MOUNT_REMOUNTING:
1004                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1005                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1006                 break;
1007
1008         case MOUNT_UNMOUNTING:
1009                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1010                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1011                 break;
1012
1013         case MOUNT_MOUNTING_SIGTERM:
1014                 log_warning("%s mounting timed out. Killing.", u->meta.id);
1015                 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1016                 break;
1017
1018         case MOUNT_REMOUNTING_SIGTERM:
1019                 log_warning("%s remounting timed out. Killing.", u->meta.id);
1020                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1021                 break;
1022
1023         case MOUNT_UNMOUNTING_SIGTERM:
1024                 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1025                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1026                 break;
1027
1028         case MOUNT_MOUNTING_SIGKILL:
1029         case MOUNT_REMOUNTING_SIGKILL:
1030         case MOUNT_UNMOUNTING_SIGKILL:
1031                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1032
1033                 if (m->from_proc_self_mountinfo)
1034                         mount_enter_mounted(m, false);
1035                 else
1036                         mount_enter_dead(m, false);
1037                 break;
1038
1039         default:
1040                 assert_not_reached("Timeout at wrong time.");
1041         }
1042 }
1043
1044 static int mount_add_one(
1045                 Manager *m,
1046                 const char *what,
1047                 const char *where,
1048                 const char *options,
1049                 const char *fstype,
1050                 bool from_proc_self_mountinfo,
1051                 bool set_flags) {
1052         int r;
1053         Unit *u;
1054         bool delete;
1055         char *e, *w = NULL, *o = NULL, *f = NULL;
1056         MountParameters *p;
1057
1058         assert(m);
1059         assert(what);
1060         assert(where);
1061         assert(options);
1062         assert(fstype);
1063
1064         assert(!set_flags || from_proc_self_mountinfo);
1065
1066         /* Ignore API mount points. They should never be referenced in
1067          * dependencies ever. */
1068         if (mount_point_is_api(where))
1069                 return 0;
1070
1071         if (streq(fstype, "autofs"))
1072                 return 0;
1073
1074         /* probably some kind of swap, ignore */
1075         if (!is_path(where))
1076                 return 0;
1077
1078         if (!(e = unit_name_from_path(where, ".mount")))
1079                 return -ENOMEM;
1080
1081         if (!(u = manager_get_unit(m, e))) {
1082                 delete = true;
1083
1084                 if (!(u = unit_new(m))) {
1085                         free(e);
1086                         return -ENOMEM;
1087                 }
1088
1089                 r = unit_add_name(u, e);
1090                 free(e);
1091
1092                 if (r < 0)
1093                         goto fail;
1094
1095                 if (!(MOUNT(u)->where = strdup(where))) {
1096                         r = -ENOMEM;
1097                         goto fail;
1098                 }
1099
1100                 unit_add_to_load_queue(u);
1101         } else {
1102                 delete = false;
1103                 free(e);
1104         }
1105
1106         if (!(w = strdup(what)) ||
1107             !(o = strdup(options)) ||
1108             !(f = strdup(fstype))) {
1109                 r = -ENOMEM;
1110                 goto fail;
1111         }
1112
1113         if (from_proc_self_mountinfo) {
1114                 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1115
1116                 if (set_flags) {
1117                         MOUNT(u)->is_mounted = true;
1118                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1119                         MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1120                 }
1121
1122                 MOUNT(u)->from_proc_self_mountinfo = true;
1123         } else {
1124                 p = &MOUNT(u)->parameters_etc_fstab;
1125                 MOUNT(u)->from_etc_fstab = true;
1126         }
1127
1128         free(p->what);
1129         p->what = w;
1130
1131         free(p->options);
1132         p->options = o;
1133
1134         free(p->fstype);
1135         p->fstype = f;
1136
1137         unit_add_to_dbus_queue(u);
1138
1139         return 0;
1140
1141 fail:
1142         free(w);
1143         free(o);
1144         free(f);
1145
1146         if (delete && u)
1147                 unit_free(u);
1148
1149         return r;
1150 }
1151
1152 static char *fstab_node_to_udev_node(char *p) {
1153         char *dn, *t;
1154         int r;
1155
1156         /* FIXME: to follow udev's logic 100% we need to leave valid
1157          * UTF8 chars unescaped */
1158
1159         if (startswith(p, "LABEL=")) {
1160
1161                 if (!(t = xescape(p+6, "/ ")))
1162                         return NULL;
1163
1164                 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1165                 free(t);
1166
1167                 if (r < 0)
1168                         return NULL;
1169
1170                 return dn;
1171         }
1172
1173         if (startswith(p, "UUID=")) {
1174
1175                 if (!(t = xescape(p+5, "/ ")))
1176                         return NULL;
1177
1178                 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1179                 free(t);
1180
1181                 if (r < 0)
1182                         return NULL;
1183
1184                 return dn;
1185         }
1186
1187         return strdup(p);
1188 }
1189
1190 static int mount_find_pri(char *options) {
1191         char *end, *pri;
1192         unsigned long r;
1193
1194         if (!(pri = mount_test_option(options, "pri=")))
1195                 return 0;
1196
1197         pri += 4;
1198
1199         errno = 0;
1200         r = strtoul(pri, &end, 10);
1201
1202         if (errno != 0)
1203                 return -errno;
1204
1205         if (end == pri || (*end != ',' && *end != 0))
1206                 return -EINVAL;
1207
1208         return (int) r;
1209 }
1210
1211 static int mount_load_etc_fstab(Manager *m) {
1212         FILE *f;
1213         int r;
1214         struct mntent* me;
1215
1216         assert(m);
1217
1218         errno = 0;
1219         if (!(f = setmntent("/etc/fstab", "r")))
1220                 return -errno;
1221
1222         while ((me = getmntent(f))) {
1223                 char *where, *what;
1224
1225                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1226                         r = -ENOMEM;
1227                         goto finish;
1228                 }
1229
1230                 if (!(where = strdup(me->mnt_dir))) {
1231                         free(what);
1232                         r = -ENOMEM;
1233                         goto finish;
1234                 }
1235
1236                 if (what[0] == '/')
1237                         path_kill_slashes(what);
1238
1239                 if (where[0] == '/')
1240                         path_kill_slashes(where);
1241
1242                 if (streq(me->mnt_type, "swap")) {
1243                         int pri;
1244
1245                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1246                                 r = pri;
1247                         else
1248                                 r = swap_add_one(m,
1249                                                  what,
1250                                                  pri,
1251                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1252                                                  !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1253                                                  false);
1254                 } else
1255                         r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1256
1257                 free(what);
1258                 free(where);
1259
1260                 if (r < 0)
1261                         goto finish;
1262         }
1263
1264         r = 0;
1265 finish:
1266
1267         endmntent(f);
1268         return r;
1269 }
1270
1271 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1272         int r;
1273         char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1274
1275         assert(m);
1276
1277         rewind(m->proc_self_mountinfo);
1278
1279         for (;;) {
1280                 int k;
1281
1282                 device = path = options = options2 = fstype = d = p = o = NULL;
1283
1284                 if ((k = fscanf(m->proc_self_mountinfo,
1285                                 "%*s "       /* (1) mount id */
1286                                 "%*s "       /* (2) parent id */
1287                                 "%*s "       /* (3) major:minor */
1288                                 "%*s "       /* (4) root */
1289                                 "%ms "       /* (5) mount point */
1290                                 "%ms"        /* (6) mount options */
1291                                 "%*[^-]"     /* (7) optional fields */
1292                                 "- "         /* (8) seperator */
1293                                 "%ms "       /* (9) file system type */
1294                                 "%ms"        /* (10) mount source */
1295                                 "%ms"        /* (11) mount options 2 */
1296                                 "%*[^\n]",   /* some rubbish at the end */
1297                                 &path,
1298                                 &options,
1299                                 &fstype,
1300                                 &device,
1301                                 &options2)) != 5) {
1302
1303                         if (k == EOF)
1304                                 break;
1305
1306                         r = -EBADMSG;
1307                         goto finish;
1308                 }
1309
1310                 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1311                         r = -ENOMEM;
1312                         goto finish;
1313                 }
1314
1315                 if (!(d = cunescape(device)) ||
1316                     !(p = cunescape(path))) {
1317                         r = -ENOMEM;
1318                         goto finish;
1319                 }
1320
1321                 if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1322                         goto finish;
1323
1324                 free(device);
1325                 free(path);
1326                 free(options);
1327                 free(options2);
1328                 free(fstype);
1329                 free(d);
1330                 free(p);
1331                 free(o);
1332         }
1333
1334         r = 0;
1335
1336 finish:
1337         free(device);
1338         free(path);
1339         free(options);
1340         free(options2);
1341         free(fstype);
1342         free(d);
1343         free(p);
1344         free(o);
1345
1346         return r;
1347 }
1348
1349 static void mount_shutdown(Manager *m) {
1350         assert(m);
1351
1352         if (m->proc_self_mountinfo) {
1353                 fclose(m->proc_self_mountinfo);
1354                 m->proc_self_mountinfo = NULL;
1355         }
1356 }
1357
1358 static int mount_enumerate(Manager *m) {
1359         int r;
1360         struct epoll_event ev;
1361         assert(m);
1362
1363         if (!m->proc_self_mountinfo) {
1364                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1365                         return -errno;
1366
1367                 m->mount_watch.type = WATCH_MOUNT;
1368                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1369
1370                 zero(ev);
1371                 ev.events = EPOLLERR;
1372                 ev.data.ptr = &m->mount_watch;
1373
1374                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1375                         return -errno;
1376         }
1377
1378         if ((r = mount_load_etc_fstab(m)) < 0)
1379                 goto fail;
1380
1381         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1382                 goto fail;
1383
1384         return 0;
1385
1386 fail:
1387         mount_shutdown(m);
1388         return r;
1389 }
1390
1391 void mount_fd_event(Manager *m, int events) {
1392         Meta *meta;
1393         int r;
1394
1395         assert(m);
1396         assert(events == EPOLLERR);
1397
1398         /* The manager calls this for every fd event happening on the
1399          * /proc/self/mountinfo file, which informs us about mounting
1400          * table changes */
1401
1402         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1403                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(errno));
1404
1405                 /* Reset flags, just in case, for later calls */
1406                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1407                         Mount *mount = (Mount*) meta;
1408
1409                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1410                 }
1411
1412                 return;
1413         }
1414
1415         manager_dispatch_load_queue(m);
1416
1417         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1418                 Mount *mount = (Mount*) meta;
1419
1420                 if (!mount->is_mounted) {
1421                         /* This has just been unmounted. */
1422
1423                         mount->from_proc_self_mountinfo = false;
1424
1425                         switch (mount->state) {
1426
1427                         case MOUNT_MOUNTED:
1428                                 mount_enter_dead(mount, true);
1429                                 break;
1430
1431                         default:
1432                                 mount_set_state(mount, mount->state);
1433                                 break;
1434
1435                         }
1436
1437                 } else if (mount->just_mounted || mount->just_changed) {
1438
1439                         /* New or changed entrymount */
1440
1441                         switch (mount->state) {
1442
1443                         case MOUNT_DEAD:
1444                         case MOUNT_MAINTENANCE:
1445                                 mount_enter_mounted(mount, true);
1446                                 break;
1447
1448                         case MOUNT_MOUNTING:
1449                                 mount_enter_mounting_done(mount);
1450                                 break;
1451
1452                         default:
1453                                 /* Nothing really changed, but let's
1454                                  * issue an notification call
1455                                  * nonetheless, in case somebody is
1456                                  * waiting for this. (e.g. file system
1457                                  * ro/rw remounts.) */
1458                                 mount_set_state(mount, mount->state);
1459                                 break;
1460                         }
1461                 }
1462
1463                 /* Reset the flags for later calls */
1464                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1465         }
1466 }
1467
1468 int mount_path_is_mounted(Manager *m, const char* path) {
1469         char *t;
1470         int r;
1471
1472         assert(m);
1473         assert(path);
1474
1475         if (path[0] != '/')
1476                 return 1;
1477
1478         if (!(t = strdup(path)))
1479                 return -ENOMEM;
1480
1481         path_kill_slashes(t);
1482
1483         for (;;) {
1484                 char *e, *slash;
1485                 Unit *u;
1486
1487                 if (!(e = unit_name_from_path(t, ".mount"))) {
1488                         r = -ENOMEM;
1489                         goto finish;
1490                 }
1491
1492                 u = manager_get_unit(m, e);
1493                 free(e);
1494
1495                 if (u &&
1496                     (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1497                     MOUNT(u)->state != MOUNT_MOUNTED) {
1498                         r = 0;
1499                         goto finish;
1500                 }
1501
1502                 assert_se(slash = strrchr(t, '/'));
1503
1504                 if (slash == t) {
1505                         r = 1;
1506                         goto finish;
1507                 }
1508
1509                 *slash = 0;
1510         }
1511
1512         r = 1;
1513
1514 finish:
1515         free(t);
1516         return r;
1517 }
1518
1519 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1520         [MOUNT_DEAD] = "dead",
1521         [MOUNT_MOUNTING] = "mounting",
1522         [MOUNT_MOUNTING_DONE] = "mounting-done",
1523         [MOUNT_MOUNTED] = "mounted",
1524         [MOUNT_REMOUNTING] = "remounting",
1525         [MOUNT_UNMOUNTING] = "unmounting",
1526         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1527         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1528         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1529         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1530         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1531         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1532         [MOUNT_MAINTENANCE] = "maintenance"
1533 };
1534
1535 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1536
1537 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1538         [MOUNT_EXEC_MOUNT] = "ExecMount",
1539         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1540         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1541 };
1542
1543 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1544
1545 const UnitVTable mount_vtable = {
1546         .suffix = ".mount",
1547
1548         .no_alias = true,
1549         .no_instances = true,
1550         .no_isolate = true,
1551         .show_status = true,
1552
1553         .init = mount_init,
1554         .load = mount_load,
1555         .done = mount_done,
1556
1557         .coldplug = mount_coldplug,
1558
1559         .dump = mount_dump,
1560
1561         .start = mount_start,
1562         .stop = mount_stop,
1563         .reload = mount_reload,
1564
1565         .serialize = mount_serialize,
1566         .deserialize_item = mount_deserialize_item,
1567
1568         .active_state = mount_active_state,
1569         .sub_state_to_string = mount_sub_state_to_string,
1570
1571         .check_gc = mount_check_gc,
1572
1573         .sigchld_event = mount_sigchld_event,
1574         .timer_event = mount_timer_event,
1575
1576         .bus_message_handler = bus_mount_message_handler,
1577
1578         .enumerate = mount_enumerate,
1579         .shutdown = mount_shutdown
1580 };