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