src/mount.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU 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         m->directory_mode = 0755;
  64
  65         exec_context_init(&m->exec_context);
  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                 m->meta.manager->mount_auto;
 249         automount = !!mount_test_option(p->options, "comment=systemd.automount");
 250
 251         if (mount_test_option(p->options, "_netdev") ||
 252             fstype_is_network(p->fstype))
 253                 target = SPECIAL_REMOTE_FS_TARGET;
 254         else
 255                 target = SPECIAL_LOCAL_FS_TARGET;
 256
 257         if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
 258                 return r;
 259
 260         if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
 261                 Unit *am;
 262
 263                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
 264                         return r;
 265
 266                 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
 267         } else {
 268
 269                 if (!noauto && handle)
 270                         if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
 271                                 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
 272                                         return r;
 273
 274                 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
 275         }
 276 }
 277
 278 static int mount_add_default_dependencies(Mount *m) {
 279         int r;
 280
 281         assert(m);
 282
 283         if (m->meta.manager->running_as == MANAGER_SYSTEM &&
 284             !path_equal(m->where, "/")) {
 285
 286                 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_FSCK_TARGET, NULL, true)) < 0)
 287                         return r;
 288
 289                 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
 290                         return r;
 291         }
 292
 293         return 0;
 294 }
 295
 296 static int mount_verify(Mount *m) {
 297         bool b;
 298         char *e;
 299         assert(m);
 300
 301         if (m->meta.load_state != UNIT_LOADED)
 302                 return 0;
 303
 304         if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
 305                 return -ENOENT;
 306
 307         if (!(e = unit_name_from_path(m->where, ".mount")))
 308                 return -ENOMEM;
 309
 310         b = unit_has_name(UNIT(m), e);
 311         free(e);
 312
 313         if (!b) {
 314                 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
 315                 return -EINVAL;
 316         }
 317
 318         if (m->meta.fragment_path && !m->parameters_fragment.what) {
 319                 log_error("%s's What setting is missing. Refusing.", m->meta.id);
 320                 return -EBADMSG;
 321         }
 322
 323         if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 324                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
 325                 return -EINVAL;
 326         }
 327
 328         return 0;
 329 }
 330
 331 static int mount_load(Unit *u) {
 332         Mount *m = MOUNT(u);
 333         int r;
 334
 335         assert(u);
 336         assert(u->meta.load_state == UNIT_STUB);
 337
 338         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
 339                 return r;
 340
 341         /* This is a new unit? Then let's add in some extras */
 342         if (u->meta.load_state == UNIT_LOADED) {
 343                 const char *what = NULL;
 344
 345                 if (m->meta.fragment_path)
 346                         m->from_fragment = true;
 347
 348                 if (!m->where)
 349                         if (!(m->where = unit_name_to_path(u->meta.id)))
 350                                 return -ENOMEM;
 351
 352                 path_kill_slashes(m->where);
 353
 354                 if (!m->meta.description)
 355                         if ((r = unit_set_description(u, m->where)) < 0)
 356                                 return r;
 357
 358                 if (m->from_fragment && m->parameters_fragment.what)
 359                         what = m->parameters_fragment.what;
 360                 else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
 361                         what = m->parameters_etc_fstab.what;
 362                 else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
 363                         what = m->parameters_proc_self_mountinfo.what;
 364
 365                 if (what && !path_equal(m->where, "/"))
 366                         if ((r = unit_add_node_link(u, what,
 367                                                     u->meta.manager->running_as == MANAGER_SYSTEM &&
 368                                                     u->meta.manager->mount_on_plug)) < 0)
 369                                 return r;
 370
 371                 if ((r = mount_add_mount_links(m)) < 0)
 372                         return r;
 373
 374                 if ((r = mount_add_socket_links(m)) < 0)
 375                         return r;
 376
 377                 if ((r = mount_add_swap_links(m)) < 0)
 378                         return r;
 379
 380                 if ((r = mount_add_path_links(m)) < 0)
 381                         return r;
 382
 383                 if ((r = mount_add_automount_links(m)) < 0)
 384                         return r;
 385
 386                 if ((r = mount_add_target_links(m)) < 0)
 387                         return r;
 388
 389                 if ((r = unit_add_default_cgroup(u)) < 0)
 390                         return r;
 391
 392                 if (m->meta.default_dependencies)
 393                         if ((r = mount_add_default_dependencies(m)) < 0)
 394                                 return r;
 395         }
 396
 397         return mount_verify(m);
 398 }
 399
 400 static int mount_notify_automount(Mount *m, int status) {
 401         Unit *p;
 402         int r;
 403
 404         assert(m);
 405
 406         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
 407                 return r == -ENOENT ? 0 : r;
 408
 409         return automount_send_ready(AUTOMOUNT(p), status);
 410 }
 411
 412 static void mount_set_state(Mount *m, MountState state) {
 413         MountState old_state;
 414         assert(m);
 415
 416         old_state = m->state;
 417         m->state = state;
 418
 419         if (state != MOUNT_MOUNTING &&
 420             state != MOUNT_MOUNTING_DONE &&
 421             state != MOUNT_REMOUNTING &&
 422             state != MOUNT_UNMOUNTING &&
 423             state != MOUNT_MOUNTING_SIGTERM &&
 424             state != MOUNT_MOUNTING_SIGKILL &&
 425             state != MOUNT_UNMOUNTING_SIGTERM &&
 426             state != MOUNT_UNMOUNTING_SIGKILL &&
 427             state != MOUNT_REMOUNTING_SIGTERM &&
 428             state != MOUNT_REMOUNTING_SIGKILL) {
 429                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
 430                 mount_unwatch_control_pid(m);
 431                 m->control_command = NULL;
 432                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 433         }
 434
 435         if (state == MOUNT_MOUNTED ||
 436             state == MOUNT_REMOUNTING)
 437                 mount_notify_automount(m, 0);
 438         else if (state == MOUNT_DEAD ||
 439                  state == MOUNT_UNMOUNTING ||
 440                  state == MOUNT_MOUNTING_SIGTERM ||
 441                  state == MOUNT_MOUNTING_SIGKILL ||
 442                  state == MOUNT_REMOUNTING_SIGTERM ||
 443                  state == MOUNT_REMOUNTING_SIGKILL ||
 444                  state == MOUNT_UNMOUNTING_SIGTERM ||
 445                  state == MOUNT_UNMOUNTING_SIGKILL ||
 446                  state == MOUNT_MAINTENANCE)
 447                 mount_notify_automount(m, -ENODEV);
 448
 449         if (state != old_state)
 450                 log_debug("%s changed %s -> %s",
 451                           m->meta.id,
 452                           mount_state_to_string(old_state),
 453                           mount_state_to_string(state));
 454
 455         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
 456 }
 457
 458 static int mount_coldplug(Unit *u) {
 459         Mount *m = MOUNT(u);
 460         MountState new_state = MOUNT_DEAD;
 461         int r;
 462
 463         assert(m);
 464         assert(m->state == MOUNT_DEAD);
 465
 466         if (m->deserialized_state != m->state)
 467                 new_state = m->deserialized_state;
 468         else if (m->from_proc_self_mountinfo)
 469                 new_state = MOUNT_MOUNTED;
 470
 471         if (new_state != m->state) {
 472
 473                 if (new_state == MOUNT_MOUNTING ||
 474                     new_state == MOUNT_MOUNTING_DONE ||
 475                     new_state == MOUNT_REMOUNTING ||
 476                     new_state == MOUNT_UNMOUNTING ||
 477                     new_state == MOUNT_MOUNTING_SIGTERM ||
 478                     new_state == MOUNT_MOUNTING_SIGKILL ||
 479                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
 480                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
 481                     new_state == MOUNT_REMOUNTING_SIGTERM ||
 482                     new_state == MOUNT_REMOUNTING_SIGKILL) {
 483
 484                         if (m->control_pid <= 0)
 485                                 return -EBADMSG;
 486
 487                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
 488                                 return r;
 489
 490                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 491                                 return r;
 492                 }
 493
 494                 mount_set_state(m, new_state);
 495         }
 496
 497         return 0;
 498 }
 499
 500 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
 501         Mount *m = MOUNT(u);
 502         MountParameters *p;
 503
 504         assert(m);
 505         assert(f);
 506
 507         if (m->from_proc_self_mountinfo)
 508                 p = &m->parameters_proc_self_mountinfo;
 509         else if (m->from_fragment)
 510                 p = &m->parameters_fragment;
 511         else
 512                 p = &m->parameters_etc_fstab;
 513
 514         fprintf(f,
 515                 "%sMount State: %s\n"
 516                 "%sWhere: %s\n"
 517                 "%sWhat: %s\n"
 518                 "%sFile System Type: %s\n"
 519                 "%sOptions: %s\n"
 520                 "%sFrom /etc/fstab: %s\n"
 521                 "%sFrom /proc/self/mountinfo: %s\n"
 522                 "%sFrom fragment: %s\n"
 523                 "%sDirectoryMode: %04o\n",
 524                 prefix, mount_state_to_string(m->state),
 525                 prefix, m->where,
 526                 prefix, strna(p->what),
 527                 prefix, strna(p->fstype),
 528                 prefix, strna(p->options),
 529                 prefix, yes_no(m->from_etc_fstab),
 530                 prefix, yes_no(m->from_proc_self_mountinfo),
 531                 prefix, yes_no(m->from_fragment),
 532                 prefix, m->directory_mode);
 533
 534         if (m->control_pid > 0)
 535                 fprintf(f,
 536                         "%sControl PID: %lu\n",
 537                         prefix, (unsigned long) m->control_pid);
 538
 539         exec_context_dump(&m->exec_context, f, prefix);
 540 }
 541
 542 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 543         pid_t pid;
 544         int r;
 545
 546         assert(m);
 547         assert(c);
 548         assert(_pid);
 549
 550         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 551                 goto fail;
 552
 553         if ((r = exec_spawn(c,
 554                             NULL,
 555                             &m->exec_context,
 556                             NULL, 0,
 557                             m->meta.manager->environment,
 558                             true,
 559                             true,
 560                             true,
 561                             m->meta.manager->confirm_spawn,
 562                             m->meta.cgroup_bondings,
 563                             &pid)) < 0)
 564                 goto fail;
 565
 566         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 567                 /* FIXME: we need to do something here */
 568                 goto fail;
 569
 570         *_pid = pid;
 571
 572         return 0;
 573
 574 fail:
 575         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 576
 577         return r;
 578 }
 579
 580 static void mount_enter_dead(Mount *m, bool success) {
 581         assert(m);
 582
 583         if (!success)
 584                 m->failure = true;
 585
 586         mount_set_state(m, m->failure ? MOUNT_MAINTENANCE : MOUNT_DEAD);
 587 }
 588
 589 static void mount_enter_mounted(Mount *m, bool success) {
 590         assert(m);
 591
 592         if (!success)
 593                 m->failure = true;
 594
 595         mount_set_state(m, MOUNT_MOUNTED);
 596 }
 597
 598 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 599         int r;
 600         bool sent = false;
 601
 602         assert(m);
 603
 604         if (!success)
 605                 m->failure = true;
 606
 607         if (m->exec_context.kill_mode != KILL_NONE) {
 608                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 609                            state == MOUNT_UNMOUNTING_SIGTERM ||
 610                            state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
 611
 612                 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
 613
 614                         if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig)) < 0) {
 615                                 if (r != -EAGAIN && r != -ESRCH)
 616                                         goto fail;
 617                         } else
 618                                 sent = true;
 619                 }
 620
 621                 if (!sent && m->control_pid > 0)
 622                         if (kill(m->exec_context.kill_mode == KILL_PROCESS ?
 623                                  m->control_pid :
 624                                  -m->control_pid, sig) < 0 && errno != ESRCH) {
 625
 626                                 r = -errno;
 627                                 goto fail;
 628                         }
 629         }
 630
 631         if (sent) {
 632                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 633                         goto fail;
 634
 635                 mount_set_state(m, state);
 636         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 637                 mount_enter_mounted(m, true);
 638         else
 639                 mount_enter_dead(m, true);
 640
 641         return;
 642
 643 fail:
 644         log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
 645
 646         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 647                 mount_enter_mounted(m, false);
 648         else
 649                 mount_enter_dead(m, false);
 650 }
 651
 652 static void mount_enter_unmounting(Mount *m, bool success) {
 653         int r;
 654
 655         assert(m);
 656
 657         if (!success)
 658                 m->failure = true;
 659
 660         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 661         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 662
 663         if ((r = exec_command_set(
 664                              m->control_command,
 665                              "/bin/umount",
 666                              m->where,
 667                              NULL)) < 0)
 668                 goto fail;
 669
 670         mount_unwatch_control_pid(m);
 671
 672         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 673                 goto fail;
 674
 675         mount_set_state(m, MOUNT_UNMOUNTING);
 676
 677         return;
 678
 679 fail:
 680         log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
 681         mount_enter_mounted(m, false);
 682 }
 683
 684 static void mount_enter_mounting(Mount *m) {
 685         int r;
 686
 687         assert(m);
 688
 689         m->control_command_id = MOUNT_EXEC_MOUNT;
 690         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 691
 692         mkdir_p(m->where, m->directory_mode);
 693
 694         if (m->from_fragment)
 695                 r = exec_command_set(
 696                                 m->control_command,
 697                                 "/bin/mount",
 698                                 m->parameters_fragment.what,
 699                                 m->where,
 700                                 "-t", m->parameters_fragment.fstype,
 701                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 702                                 NULL);
 703         else if (m->from_etc_fstab)
 704                 r = exec_command_set(
 705                                 m->control_command,
 706                                 "/bin/mount",
 707                                 m->where,
 708                                 NULL);
 709         else
 710                 r = -ENOENT;
 711
 712         if (r < 0)
 713                 goto fail;
 714
 715         mount_unwatch_control_pid(m);
 716
 717         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 718                 goto fail;
 719
 720         mount_set_state(m, MOUNT_MOUNTING);
 721
 722         return;
 723
 724 fail:
 725         log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
 726         mount_enter_dead(m, false);
 727 }
 728
 729 static void mount_enter_mounting_done(Mount *m) {
 730         assert(m);
 731
 732         mount_set_state(m, MOUNT_MOUNTING_DONE);
 733 }
 734
 735 static void mount_enter_remounting(Mount *m, bool success) {
 736         int r;
 737
 738         assert(m);
 739
 740         if (!success)
 741                 m->failure = true;
 742
 743         m->control_command_id = MOUNT_EXEC_REMOUNT;
 744         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 745
 746         if (m->from_fragment) {
 747                 char *buf = NULL;
 748                 const char *o;
 749
 750                 if (m->parameters_fragment.options) {
 751                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 752                                 r = -ENOMEM;
 753                                 goto fail;
 754                         }
 755
 756                         o = buf;
 757                 } else
 758                         o = "remount";
 759
 760                 r = exec_command_set(
 761                                 m->control_command,
 762                                 "/bin/mount",
 763                                 m->parameters_fragment.what,
 764                                 m->where,
 765                                 "-t", m->parameters_fragment.fstype,
 766                                 "-o", o,
 767                                 NULL);
 768
 769                 free(buf);
 770         } else if (m->from_etc_fstab)
 771                 r = exec_command_set(
 772                                 m->control_command,
 773                                 "/bin/mount",
 774                                 m->where,
 775                                 "-o", "remount",
 776                                 NULL);
 777         else
 778                 r = -ENOENT;
 779
 780         if (r < 0) {
 781                 r = -ENOMEM;
 782                 goto fail;
 783         }
 784
 785         mount_unwatch_control_pid(m);
 786
 787         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 788                 goto fail;
 789
 790         mount_set_state(m, MOUNT_REMOUNTING);
 791
 792         return;
 793
 794 fail:
 795         log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
 796         mount_enter_mounted(m, false);
 797 }
 798
 799 static int mount_start(Unit *u) {
 800         Mount *m = MOUNT(u);
 801
 802         assert(m);
 803
 804         /* We cannot fulfill this request right now, try again later
 805          * please! */
 806         if (m->state == MOUNT_UNMOUNTING ||
 807             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 808             m->state == MOUNT_UNMOUNTING_SIGKILL)
 809                 return -EAGAIN;
 810
 811         /* Already on it! */
 812         if (m->state == MOUNT_MOUNTING ||
 813             m->state == MOUNT_MOUNTING_SIGTERM ||
 814             m->state == MOUNT_MOUNTING_SIGKILL)
 815                 return 0;
 816
 817         assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTENANCE);
 818
 819         m->failure = false;
 820         mount_enter_mounting(m);
 821         return 0;
 822 }
 823
 824 static int mount_stop(Unit *u) {
 825         Mount *m = MOUNT(u);
 826
 827         assert(m);
 828
 829         /* Already on it */
 830         if (m->state == MOUNT_UNMOUNTING ||
 831             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 832             m->state == MOUNT_UNMOUNTING_SIGTERM)
 833                 return 0;
 834
 835         assert(m->state == MOUNT_MOUNTING ||
 836                m->state == MOUNT_MOUNTING_DONE ||
 837                m->state == MOUNT_MOUNTED ||
 838                m->state == MOUNT_MOUNTING_SIGTERM ||
 839                m->state == MOUNT_MOUNTING_SIGKILL ||
 840                m->state == MOUNT_REMOUNTING ||
 841                m->state == MOUNT_REMOUNTING_SIGTERM ||
 842                m->state == MOUNT_REMOUNTING_SIGKILL);
 843
 844         mount_enter_unmounting(m, true);
 845         return 0;
 846 }
 847
 848 static int mount_reload(Unit *u) {
 849         Mount *m = MOUNT(u);
 850
 851         assert(m);
 852
 853         if (m->state == MOUNT_MOUNTING_DONE)
 854                 return -EAGAIN;
 855
 856         assert(m->state == MOUNT_MOUNTED);
 857
 858         mount_enter_remounting(m, true);
 859         return 0;
 860 }
 861
 862 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
 863         Mount *m = MOUNT(u);
 864
 865         assert(m);
 866         assert(f);
 867         assert(fds);
 868
 869         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
 870         unit_serialize_item(u, f, "failure", yes_no(m->failure));
 871
 872         if (m->control_pid > 0)
 873                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
 874
 875         if (m->control_command_id >= 0)
 876                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
 877
 878         return 0;
 879 }
 880
 881 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
 882         Mount *m = MOUNT(u);
 883
 884         assert(u);
 885         assert(key);
 886         assert(value);
 887         assert(fds);
 888
 889         if (streq(key, "state")) {
 890                 MountState state;
 891
 892                 if ((state = mount_state_from_string(value)) < 0)
 893                         log_debug("Failed to parse state value %s", value);
 894                 else
 895                         m->deserialized_state = state;
 896         } else if (streq(key, "failure")) {
 897                 int b;
 898
 899                 if ((b = parse_boolean(value)) < 0)
 900                         log_debug("Failed to parse failure value %s", value);
 901                 else
 902                         m->failure = b || m->failure;
 903
 904         } else if (streq(key, "control-pid")) {
 905                 pid_t pid;
 906
 907                 if (parse_pid(value, &pid) < 0)
 908                         log_debug("Failed to parse control-pid value %s", value);
 909                 else
 910                         m->control_pid = pid;
 911         } else if (streq(key, "control-command")) {
 912                 MountExecCommand id;
 913
 914                 if ((id = mount_exec_command_from_string(value)) < 0)
 915                         log_debug("Failed to parse exec-command value %s", value);
 916                 else {
 917                         m->control_command_id = id;
 918                         m->control_command = m->exec_command + id;
 919                 }
 920
 921         } else
 922                 log_debug("Unknown serialization key '%s'", key);
 923
 924         return 0;
 925 }
 926
 927 static UnitActiveState mount_active_state(Unit *u) {
 928         assert(u);
 929
 930         return state_translation_table[MOUNT(u)->state];
 931 }
 932
 933 static const char *mount_sub_state_to_string(Unit *u) {
 934         assert(u);
 935
 936         return mount_state_to_string(MOUNT(u)->state);
 937 }
 938
 939 static bool mount_check_gc(Unit *u) {
 940         Mount *m = MOUNT(u);
 941
 942         assert(m);
 943
 944         return m->from_etc_fstab || m->from_proc_self_mountinfo;
 945 }
 946
 947 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
 948         Mount *m = MOUNT(u);
 949         bool success;
 950
 951         assert(m);
 952         assert(pid >= 0);
 953
 954         if (pid != m->control_pid)
 955                 return;
 956
 957         m->control_pid = 0;
 958
 959         success = is_clean_exit(code, status);
 960         m->failure = m->failure || !success;
 961
 962         if (m->control_command) {
 963                 exec_status_exit(&m->control_command->exec_status, pid, code, status);
 964                 m->control_command = NULL;
 965                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 966         }
 967
 968         log_full(success ? LOG_DEBUG : LOG_NOTICE,
 969                  "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
 970
 971         /* Note that mount(8) returning and the kernel sending us a
 972          * mount table change event might happen out-of-order. If an
 973          * operation succeed we assume the kernel will follow soon too
 974          * and already change into the resulting state.  If it fails
 975          * we check if the kernel still knows about the mount. and
 976          * change state accordingly. */
 977
 978         switch (m->state) {
 979
 980         case MOUNT_MOUNTING:
 981         case MOUNT_MOUNTING_DONE:
 982         case MOUNT_MOUNTING_SIGKILL:
 983         case MOUNT_MOUNTING_SIGTERM:
 984         case MOUNT_REMOUNTING:
 985         case MOUNT_REMOUNTING_SIGKILL:
 986         case MOUNT_REMOUNTING_SIGTERM:
 987
 988                 if (success)
 989                         mount_enter_mounted(m, true);
 990                 else if (m->from_proc_self_mountinfo)
 991                         mount_enter_mounted(m, false);
 992                 else
 993                         mount_enter_dead(m, false);
 994                 break;
 995
 996         case MOUNT_UNMOUNTING:
 997         case MOUNT_UNMOUNTING_SIGKILL:
 998         case MOUNT_UNMOUNTING_SIGTERM:
 999
1000                 if (success)
1001                         mount_enter_dead(m, true);
1002                 else if (m->from_proc_self_mountinfo)
1003                         mount_enter_mounted(m, false);
1004                 else
1005                         mount_enter_dead(m, false);
1006                 break;
1007
1008         default:
1009                 assert_not_reached("Uh, control process died at wrong time.");
1010         }
1011
1012         /* Notify clients about changed exit status */
1013         unit_add_to_dbus_queue(u);
1014 }
1015
1016 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1017         Mount *m = MOUNT(u);
1018
1019         assert(m);
1020         assert(elapsed == 1);
1021         assert(w == &m->timer_watch);
1022
1023         switch (m->state) {
1024
1025         case MOUNT_MOUNTING:
1026         case MOUNT_MOUNTING_DONE:
1027                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1028                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1029                 break;
1030
1031         case MOUNT_REMOUNTING:
1032                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1033                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1034                 break;
1035
1036         case MOUNT_UNMOUNTING:
1037                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1038                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1039                 break;
1040
1041         case MOUNT_MOUNTING_SIGTERM:
1042                 log_warning("%s mounting timed out. Killing.", u->meta.id);
1043                 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1044                 break;
1045
1046         case MOUNT_REMOUNTING_SIGTERM:
1047                 log_warning("%s remounting timed out. Killing.", u->meta.id);
1048                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1049                 break;
1050
1051         case MOUNT_UNMOUNTING_SIGTERM:
1052                 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1053                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1054                 break;
1055
1056         case MOUNT_MOUNTING_SIGKILL:
1057         case MOUNT_REMOUNTING_SIGKILL:
1058         case MOUNT_UNMOUNTING_SIGKILL:
1059                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1060
1061                 if (m->from_proc_self_mountinfo)
1062                         mount_enter_mounted(m, false);
1063                 else
1064                         mount_enter_dead(m, false);
1065                 break;
1066
1067         default:
1068                 assert_not_reached("Timeout at wrong time.");
1069         }
1070 }
1071
1072 static int mount_add_one(
1073                 Manager *m,
1074                 const char *what,
1075                 const char *where,
1076                 const char *options,
1077                 const char *fstype,
1078                 bool from_proc_self_mountinfo,
1079                 bool set_flags) {
1080         int r;
1081         Unit *u;
1082         bool delete;
1083         char *e, *w = NULL, *o = NULL, *f = NULL;
1084         MountParameters *p;
1085
1086         assert(m);
1087         assert(what);
1088         assert(where);
1089         assert(options);
1090         assert(fstype);
1091
1092         assert(!set_flags || from_proc_self_mountinfo);
1093
1094         /* Ignore API mount points. They should never be referenced in
1095          * dependencies ever. */
1096         if (mount_point_is_api(where))
1097                 return 0;
1098
1099         if (streq(fstype, "autofs"))
1100                 return 0;
1101
1102         /* probably some kind of swap, ignore */
1103         if (!is_path(where))
1104                 return 0;
1105
1106         if (!(e = unit_name_from_path(where, ".mount")))
1107                 return -ENOMEM;
1108
1109         if (!(u = manager_get_unit(m, e))) {
1110                 delete = true;
1111
1112                 if (!(u = unit_new(m))) {
1113                         free(e);
1114                         return -ENOMEM;
1115                 }
1116
1117                 r = unit_add_name(u, e);
1118                 free(e);
1119
1120                 if (r < 0)
1121                         goto fail;
1122
1123                 if (!(MOUNT(u)->where = strdup(where))) {
1124                         r = -ENOMEM;
1125                         goto fail;
1126                 }
1127
1128                 unit_add_to_load_queue(u);
1129         } else {
1130                 delete = false;
1131                 free(e);
1132         }
1133
1134         if (!(w = strdup(what)) ||
1135             !(o = strdup(options)) ||
1136             !(f = strdup(fstype))) {
1137                 r = -ENOMEM;
1138                 goto fail;
1139         }
1140
1141         if (from_proc_self_mountinfo) {
1142                 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1143
1144                 if (set_flags) {
1145                         MOUNT(u)->is_mounted = true;
1146                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1147                         MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1148                 }
1149
1150                 MOUNT(u)->from_proc_self_mountinfo = true;
1151         } else {
1152                 p = &MOUNT(u)->parameters_etc_fstab;
1153                 MOUNT(u)->from_etc_fstab = true;
1154         }
1155
1156         free(p->what);
1157         p->what = w;
1158
1159         free(p->options);
1160         p->options = o;
1161
1162         free(p->fstype);
1163         p->fstype = f;
1164
1165         unit_add_to_dbus_queue(u);
1166
1167         return 0;
1168
1169 fail:
1170         free(w);
1171         free(o);
1172         free(f);
1173
1174         if (delete && u)
1175                 unit_free(u);
1176
1177         return r;
1178 }
1179
1180 static char *fstab_node_to_udev_node(char *p) {
1181         char *dn, *t, *u;
1182         int r;
1183
1184         /* FIXME: to follow udev's logic 100% we need to leave valid
1185          * UTF8 chars unescaped */
1186
1187         if (startswith(p, "LABEL=")) {
1188
1189                 if (!(u = unquote(p+6, '"')))
1190                         return NULL;
1191
1192                 t = xescape(u, "/ ");
1193                 free(u);
1194
1195                 if (!t)
1196                         return NULL;
1197
1198                 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1199                 free(t);
1200
1201                 if (r < 0)
1202                         return NULL;
1203
1204                 return dn;
1205         }
1206
1207         if (startswith(p, "UUID=")) {
1208
1209                 if (!(u = unquote(p+5, '"')))
1210                         return NULL;
1211
1212                 t = xescape(u, "/ ");
1213                 free(u);
1214
1215                 if (!t)
1216                         return NULL;
1217
1218                 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1219                 free(t);
1220
1221                 if (r < 0)
1222                         return NULL;
1223
1224                 return dn;
1225         }
1226
1227         return strdup(p);
1228 }
1229
1230 static int mount_find_pri(char *options) {
1231         char *end, *pri;
1232         unsigned long r;
1233
1234         if (!(pri = mount_test_option(options, "pri=")))
1235                 return 0;
1236
1237         pri += 4;
1238
1239         errno = 0;
1240         r = strtoul(pri, &end, 10);
1241
1242         if (errno != 0)
1243                 return -errno;
1244
1245         if (end == pri || (*end != ',' && *end != 0))
1246                 return -EINVAL;
1247
1248         return (int) r;
1249 }
1250
1251 static int mount_load_etc_fstab(Manager *m) {
1252         FILE *f;
1253         int r;
1254         struct mntent* me;
1255
1256         assert(m);
1257
1258         errno = 0;
1259         if (!(f = setmntent("/etc/fstab", "r")))
1260                 return -errno;
1261
1262         while ((me = getmntent(f))) {
1263                 char *where, *what;
1264
1265                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1266                         r = -ENOMEM;
1267                         goto finish;
1268                 }
1269
1270                 if (!(where = strdup(me->mnt_dir))) {
1271                         free(what);
1272                         r = -ENOMEM;
1273                         goto finish;
1274                 }
1275
1276                 if (what[0] == '/')
1277                         path_kill_slashes(what);
1278
1279                 if (where[0] == '/')
1280                         path_kill_slashes(where);
1281
1282                 if (streq(me->mnt_type, "swap")) {
1283                         int pri;
1284
1285                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1286                                 r = pri;
1287                         else
1288                                 r = swap_add_one(m,
1289                                                  what,
1290                                                  pri,
1291                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1292                                                  !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1293                                                  false);
1294                 } else
1295                         r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1296
1297                 free(what);
1298                 free(where);
1299
1300                 if (r < 0)
1301                         goto finish;
1302         }
1303
1304         r = 0;
1305 finish:
1306
1307         endmntent(f);
1308         return r;
1309 }
1310
1311 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1312         int r;
1313         char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1314
1315         assert(m);
1316
1317         rewind(m->proc_self_mountinfo);
1318
1319         for (;;) {
1320                 int k;
1321
1322                 device = path = options = options2 = fstype = d = p = o = NULL;
1323
1324                 if ((k = fscanf(m->proc_self_mountinfo,
1325                                 "%*s "       /* (1) mount id */
1326                                 "%*s "       /* (2) parent id */
1327                                 "%*s "       /* (3) major:minor */
1328                                 "%*s "       /* (4) root */
1329                                 "%ms "       /* (5) mount point */
1330                                 "%ms"        /* (6) mount options */
1331                                 "%*[^-]"     /* (7) optional fields */
1332                                 "- "         /* (8) seperator */
1333                                 "%ms "       /* (9) file system type */
1334                                 "%ms"        /* (10) mount source */
1335                                 "%ms"        /* (11) mount options 2 */
1336                                 "%*[^\n]",   /* some rubbish at the end */
1337                                 &path,
1338                                 &options,
1339                                 &fstype,
1340                                 &device,
1341                                 &options2)) != 5) {
1342
1343                         if (k == EOF)
1344                                 break;
1345
1346                         r = -EBADMSG;
1347                         goto finish;
1348                 }
1349
1350                 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1351                         r = -ENOMEM;
1352                         goto finish;
1353                 }
1354
1355                 if (!(d = cunescape(device)) ||
1356                     !(p = cunescape(path))) {
1357                         r = -ENOMEM;
1358                         goto finish;
1359                 }
1360
1361                 if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1362                         goto finish;
1363
1364                 free(device);
1365                 free(path);
1366                 free(options);
1367                 free(options2);
1368                 free(fstype);
1369                 free(d);
1370                 free(p);
1371                 free(o);
1372         }
1373
1374         r = 0;
1375
1376 finish:
1377         free(device);
1378         free(path);
1379         free(options);
1380         free(options2);
1381         free(fstype);
1382         free(d);
1383         free(p);
1384         free(o);
1385
1386         return r;
1387 }
1388
1389 static void mount_shutdown(Manager *m) {
1390         assert(m);
1391
1392         if (m->proc_self_mountinfo) {
1393                 fclose(m->proc_self_mountinfo);
1394                 m->proc_self_mountinfo = NULL;
1395         }
1396 }
1397
1398 static int mount_enumerate(Manager *m) {
1399         int r;
1400         struct epoll_event ev;
1401         assert(m);
1402
1403         if (!m->proc_self_mountinfo) {
1404                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1405                         return -errno;
1406
1407                 m->mount_watch.type = WATCH_MOUNT;
1408                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1409
1410                 zero(ev);
1411                 ev.events = EPOLLERR;
1412                 ev.data.ptr = &m->mount_watch;
1413
1414                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1415                         return -errno;
1416         }
1417
1418         if ((r = mount_load_etc_fstab(m)) < 0)
1419                 goto fail;
1420
1421         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1422                 goto fail;
1423
1424         return 0;
1425
1426 fail:
1427         mount_shutdown(m);
1428         return r;
1429 }
1430
1431 void mount_fd_event(Manager *m, int events) {
1432         Meta *meta;
1433         int r;
1434
1435         assert(m);
1436         assert(events == EPOLLERR);
1437
1438         /* The manager calls this for every fd event happening on the
1439          * /proc/self/mountinfo file, which informs us about mounting
1440          * table changes */
1441
1442         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1443                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1444
1445                 /* Reset flags, just in case, for later calls */
1446                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1447                         Mount *mount = (Mount*) meta;
1448
1449                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1450                 }
1451
1452                 return;
1453         }
1454
1455         manager_dispatch_load_queue(m);
1456
1457         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1458                 Mount *mount = (Mount*) meta;
1459
1460                 if (!mount->is_mounted) {
1461                         /* This has just been unmounted. */
1462
1463                         mount->from_proc_self_mountinfo = false;
1464
1465                         switch (mount->state) {
1466
1467                         case MOUNT_MOUNTED:
1468                                 mount_enter_dead(mount, true);
1469                                 break;
1470
1471                         default:
1472                                 mount_set_state(mount, mount->state);
1473                                 break;
1474
1475                         }
1476
1477                 } else if (mount->just_mounted || mount->just_changed) {
1478
1479                         /* New or changed entrymount */
1480
1481                         switch (mount->state) {
1482
1483                         case MOUNT_DEAD:
1484                         case MOUNT_MAINTENANCE:
1485                                 mount_enter_mounted(mount, true);
1486                                 break;
1487
1488                         case MOUNT_MOUNTING:
1489                                 mount_enter_mounting_done(mount);
1490                                 break;
1491
1492                         default:
1493                                 /* Nothing really changed, but let's
1494                                  * issue an notification call
1495                                  * nonetheless, in case somebody is
1496                                  * waiting for this. (e.g. file system
1497                                  * ro/rw remounts.) */
1498                                 mount_set_state(mount, mount->state);
1499                                 break;
1500                         }
1501                 }
1502
1503                 /* Reset the flags for later calls */
1504                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1505         }
1506 }
1507
1508 static void mount_reset_maintenance(Unit *u) {
1509         Mount *m = MOUNT(u);
1510
1511         assert(m);
1512
1513         if (m->state == MOUNT_MAINTENANCE)
1514                 mount_set_state(m, MOUNT_DEAD);
1515
1516         m->failure = false;
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         .reset_maintenance = mount_reset_maintenance,
1577
1578         .bus_interface = "org.freedesktop.systemd1.Mount",
1579         .bus_message_handler = bus_mount_message_handler,
1580         .bus_invalidating_properties =  bus_mount_invalidating_properties,
1581
1582         .enumerate = mount_enumerate,
1583         .shutdown = mount_shutdown
1584 };