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         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         automount = !!mount_test_option(p->options, "comment=systemd.automount");
 249
 250         if (mount_test_option(p->options, "_netdev") ||
 251             fstype_is_network(p->fstype))
 252                 target = SPECIAL_REMOTE_FS_TARGET;
 253         else
 254                 target = SPECIAL_LOCAL_FS_TARGET;
 255
 256         if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
 257                 return r;
 258
 259         if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
 260                 Unit *am;
 261
 262                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
 263                         return r;
 264
 265                 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
 266         } else {
 267
 268                 if (!noauto && handle)
 269                         if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
 270                                 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
 271                                         return r;
 272
 273                 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
 274         }
 275 }
 276
 277 static int mount_verify(Mount *m) {
 278         bool b;
 279         char *e;
 280         assert(m);
 281
 282         if (m->meta.load_state != UNIT_LOADED)
 283                 return 0;
 284
 285         if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
 286                 return -ENOENT;
 287
 288         if (!(e = unit_name_from_path(m->where, ".mount")))
 289                 return -ENOMEM;
 290
 291         b = unit_has_name(UNIT(m), e);
 292         free(e);
 293
 294         if (!b) {
 295                 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
 296                 return -EINVAL;
 297         }
 298
 299         if (m->meta.fragment_path && !m->parameters_fragment.what) {
 300                 log_error("%s's What setting is missing. Refusing.", m->meta.id);
 301                 return -EBADMSG;
 302         }
 303
 304         if (m->exec_context.pam_name && m->kill_mode != KILL_CONTROL_GROUP) {
 305                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
 306                 return -EINVAL;
 307         }
 308
 309         return 0;
 310 }
 311
 312 static int mount_load(Unit *u) {
 313         Mount *m = MOUNT(u);
 314         int r;
 315
 316         assert(u);
 317         assert(u->meta.load_state == UNIT_STUB);
 318
 319         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
 320                 return r;
 321
 322         /* This is a new unit? Then let's add in some extras */
 323         if (u->meta.load_state == UNIT_LOADED) {
 324                 const char *what = NULL;
 325
 326                 if (m->meta.fragment_path)
 327                         m->from_fragment = true;
 328
 329                 if (!m->where)
 330                         if (!(m->where = unit_name_to_path(u->meta.id)))
 331                                 return -ENOMEM;
 332
 333                 path_kill_slashes(m->where);
 334
 335                 if (!m->meta.description)
 336                         if ((r = unit_set_description(u, m->where)) < 0)
 337                                 return r;
 338
 339                 if (m->from_fragment && m->parameters_fragment.what)
 340                         what = m->parameters_fragment.what;
 341                 else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
 342                         what = m->parameters_etc_fstab.what;
 343                 else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
 344                         what = m->parameters_proc_self_mountinfo.what;
 345
 346                 if (what)
 347                         if ((r = unit_add_node_link(u, what, u->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
 348                                 return r;
 349
 350                 if ((r = mount_add_mount_links(m)) < 0)
 351                         return r;
 352
 353                 if ((r = mount_add_socket_links(m)) < 0)
 354                         return r;
 355
 356                 if ((r = mount_add_swap_links(m)) < 0)
 357                         return r;
 358
 359                 if ((r = mount_add_path_links(m)) < 0)
 360                         return r;
 361
 362                 if ((r = mount_add_automount_links(m)) < 0)
 363                         return r;
 364
 365                 if ((r = mount_add_target_links(m)) < 0)
 366                         return r;
 367
 368                 if ((r = unit_add_default_cgroup(u)) < 0)
 369                         return r;
 370
 371                 if (m->meta.default_dependencies &&
 372                     m->meta.manager->running_as == MANAGER_SYSTEM &&
 373                     !path_equal(m->where, "/"))
 374                         if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
 375                                 return r;
 376         }
 377
 378         return mount_verify(m);
 379 }
 380
 381 static int mount_notify_automount(Mount *m, int status) {
 382         Unit *p;
 383         int r;
 384
 385         assert(m);
 386
 387         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
 388                 return r == -ENOENT ? 0 : r;
 389
 390         return automount_send_ready(AUTOMOUNT(p), status);
 391 }
 392
 393 static void mount_set_state(Mount *m, MountState state) {
 394         MountState old_state;
 395         assert(m);
 396
 397         old_state = m->state;
 398         m->state = state;
 399
 400         if (state != MOUNT_MOUNTING &&
 401             state != MOUNT_MOUNTING_DONE &&
 402             state != MOUNT_REMOUNTING &&
 403             state != MOUNT_UNMOUNTING &&
 404             state != MOUNT_MOUNTING_SIGTERM &&
 405             state != MOUNT_MOUNTING_SIGKILL &&
 406             state != MOUNT_UNMOUNTING_SIGTERM &&
 407             state != MOUNT_UNMOUNTING_SIGKILL &&
 408             state != MOUNT_REMOUNTING_SIGTERM &&
 409             state != MOUNT_REMOUNTING_SIGKILL) {
 410                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
 411                 mount_unwatch_control_pid(m);
 412                 m->control_command = NULL;
 413                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 414         }
 415
 416         if (state == MOUNT_MOUNTED ||
 417             state == MOUNT_REMOUNTING)
 418                 mount_notify_automount(m, 0);
 419         else if (state == MOUNT_DEAD ||
 420                  state == MOUNT_UNMOUNTING ||
 421                  state == MOUNT_MOUNTING_SIGTERM ||
 422                  state == MOUNT_MOUNTING_SIGKILL ||
 423                  state == MOUNT_REMOUNTING_SIGTERM ||
 424                  state == MOUNT_REMOUNTING_SIGKILL ||
 425                  state == MOUNT_UNMOUNTING_SIGTERM ||
 426                  state == MOUNT_UNMOUNTING_SIGKILL ||
 427                  state == MOUNT_MAINTENANCE)
 428                 mount_notify_automount(m, -ENODEV);
 429
 430         if (state != old_state)
 431                 log_debug("%s changed %s -> %s",
 432                           m->meta.id,
 433                           mount_state_to_string(old_state),
 434                           mount_state_to_string(state));
 435
 436         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
 437 }
 438
 439 static int mount_coldplug(Unit *u) {
 440         Mount *m = MOUNT(u);
 441         MountState new_state = MOUNT_DEAD;
 442         int r;
 443
 444         assert(m);
 445         assert(m->state == MOUNT_DEAD);
 446
 447         if (m->deserialized_state != m->state)
 448                 new_state = m->deserialized_state;
 449         else if (m->from_proc_self_mountinfo)
 450                 new_state = MOUNT_MOUNTED;
 451
 452         if (new_state != m->state) {
 453
 454                 if (new_state == MOUNT_MOUNTING ||
 455                     new_state == MOUNT_MOUNTING_DONE ||
 456                     new_state == MOUNT_REMOUNTING ||
 457                     new_state == MOUNT_UNMOUNTING ||
 458                     new_state == MOUNT_MOUNTING_SIGTERM ||
 459                     new_state == MOUNT_MOUNTING_SIGKILL ||
 460                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
 461                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
 462                     new_state == MOUNT_REMOUNTING_SIGTERM ||
 463                     new_state == MOUNT_REMOUNTING_SIGKILL) {
 464
 465                         if (m->control_pid <= 0)
 466                                 return -EBADMSG;
 467
 468                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
 469                                 return r;
 470
 471                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 472                                 return r;
 473                 }
 474
 475                 mount_set_state(m, new_state);
 476         }
 477
 478         return 0;
 479 }
 480
 481 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
 482         Mount *m = MOUNT(u);
 483         MountParameters *p;
 484
 485         assert(m);
 486         assert(f);
 487
 488         if (m->from_proc_self_mountinfo)
 489                 p = &m->parameters_proc_self_mountinfo;
 490         else if (m->from_fragment)
 491                 p = &m->parameters_fragment;
 492         else
 493                 p = &m->parameters_etc_fstab;
 494
 495         fprintf(f,
 496                 "%sMount State: %s\n"
 497                 "%sWhere: %s\n"
 498                 "%sWhat: %s\n"
 499                 "%sFile System Type: %s\n"
 500                 "%sOptions: %s\n"
 501                 "%sFrom /etc/fstab: %s\n"
 502                 "%sFrom /proc/self/mountinfo: %s\n"
 503                 "%sFrom fragment: %s\n"
 504                 "%sKillMode: %s\n"
 505                 "%sDirectoryMode: %04o\n",
 506                 prefix, mount_state_to_string(m->state),
 507                 prefix, m->where,
 508                 prefix, strna(p->what),
 509                 prefix, strna(p->fstype),
 510                 prefix, strna(p->options),
 511                 prefix, yes_no(m->from_etc_fstab),
 512                 prefix, yes_no(m->from_proc_self_mountinfo),
 513                 prefix, yes_no(m->from_fragment),
 514                 prefix, kill_mode_to_string(m->kill_mode),
 515                 prefix, m->directory_mode);
 516
 517         if (m->control_pid > 0)
 518                 fprintf(f,
 519                         "%sControl PID: %lu\n",
 520                         prefix, (unsigned long) m->control_pid);
 521
 522         exec_context_dump(&m->exec_context, f, prefix);
 523 }
 524
 525 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 526         pid_t pid;
 527         int r;
 528
 529         assert(m);
 530         assert(c);
 531         assert(_pid);
 532
 533         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 534                 goto fail;
 535
 536         if ((r = exec_spawn(c,
 537                             NULL,
 538                             &m->exec_context,
 539                             NULL, 0,
 540                             m->meta.manager->environment,
 541                             true,
 542                             true,
 543                             true,
 544                             m->meta.manager->confirm_spawn,
 545                             m->meta.cgroup_bondings,
 546                             &pid)) < 0)
 547                 goto fail;
 548
 549         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 550                 /* FIXME: we need to do something here */
 551                 goto fail;
 552
 553         *_pid = pid;
 554
 555         return 0;
 556
 557 fail:
 558         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 559
 560         return r;
 561 }
 562
 563 static void mount_enter_dead(Mount *m, bool success) {
 564         assert(m);
 565
 566         if (!success)
 567                 m->failure = true;
 568
 569         mount_set_state(m, m->failure ? MOUNT_MAINTENANCE : MOUNT_DEAD);
 570 }
 571
 572 static void mount_enter_mounted(Mount *m, bool success) {
 573         assert(m);
 574
 575         if (!success)
 576                 m->failure = true;
 577
 578         mount_set_state(m, MOUNT_MOUNTED);
 579 }
 580
 581 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 582         int r;
 583         bool sent = false;
 584
 585         assert(m);
 586
 587         if (!success)
 588                 m->failure = true;
 589
 590         if (m->kill_mode != KILL_NONE) {
 591                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 592                            state == MOUNT_UNMOUNTING_SIGTERM ||
 593                            state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
 594
 595                 if (m->kill_mode == KILL_CONTROL_GROUP) {
 596
 597                         if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig)) < 0) {
 598                                 if (r != -EAGAIN && r != -ESRCH)
 599                                         goto fail;
 600                         } else
 601                                 sent = true;
 602                 }
 603
 604                 if (!sent && m->control_pid > 0)
 605                         if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
 606                                 r = -errno;
 607                                 goto fail;
 608                         }
 609         }
 610
 611         if (sent) {
 612                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 613                         goto fail;
 614
 615                 mount_set_state(m, state);
 616         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 617                 mount_enter_mounted(m, true);
 618         else
 619                 mount_enter_dead(m, true);
 620
 621         return;
 622
 623 fail:
 624         log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
 625
 626         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 627                 mount_enter_mounted(m, false);
 628         else
 629                 mount_enter_dead(m, false);
 630 }
 631
 632 static void mount_enter_unmounting(Mount *m, bool success) {
 633         int r;
 634
 635         assert(m);
 636
 637         if (!success)
 638                 m->failure = true;
 639
 640         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 641         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 642
 643         if ((r = exec_command_set(
 644                              m->control_command,
 645                              "/bin/umount",
 646                              m->where,
 647                              NULL)) < 0)
 648                 goto fail;
 649
 650         mount_unwatch_control_pid(m);
 651
 652         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 653                 goto fail;
 654
 655         mount_set_state(m, MOUNT_UNMOUNTING);
 656
 657         return;
 658
 659 fail:
 660         log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
 661         mount_enter_mounted(m, false);
 662 }
 663
 664 static void mount_enter_mounting(Mount *m) {
 665         int r;
 666
 667         assert(m);
 668
 669         m->control_command_id = MOUNT_EXEC_MOUNT;
 670         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 671
 672         mkdir_p(m->where, m->directory_mode);
 673
 674         if (m->from_fragment)
 675                 r = exec_command_set(
 676                                 m->control_command,
 677                                 "/bin/mount",
 678                                 m->parameters_fragment.what,
 679                                 m->where,
 680                                 "-t", m->parameters_fragment.fstype,
 681                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 682                                 NULL);
 683         else if (m->from_etc_fstab)
 684                 r = exec_command_set(
 685                                 m->control_command,
 686                                 "/bin/mount",
 687                                 m->where,
 688                                 NULL);
 689         else
 690                 r = -ENOENT;
 691
 692         if (r < 0)
 693                 goto fail;
 694
 695         mount_unwatch_control_pid(m);
 696
 697         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 698                 goto fail;
 699
 700         mount_set_state(m, MOUNT_MOUNTING);
 701
 702         return;
 703
 704 fail:
 705         log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
 706         mount_enter_dead(m, false);
 707 }
 708
 709 static void mount_enter_mounting_done(Mount *m) {
 710         assert(m);
 711
 712         mount_set_state(m, MOUNT_MOUNTING_DONE);
 713 }
 714
 715 static void mount_enter_remounting(Mount *m, bool success) {
 716         int r;
 717
 718         assert(m);
 719
 720         if (!success)
 721                 m->failure = true;
 722
 723         m->control_command_id = MOUNT_EXEC_REMOUNT;
 724         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 725
 726         if (m->from_fragment) {
 727                 char *buf = NULL;
 728                 const char *o;
 729
 730                 if (m->parameters_fragment.options) {
 731                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 732                                 r = -ENOMEM;
 733                                 goto fail;
 734                         }
 735
 736                         o = buf;
 737                 } else
 738                         o = "remount";
 739
 740                 r = exec_command_set(
 741                                 m->control_command,
 742                                 "/bin/mount",
 743                                 m->parameters_fragment.what,
 744                                 m->where,
 745                                 "-t", m->parameters_fragment.fstype,
 746                                 "-o", o,
 747                                 NULL);
 748
 749                 free(buf);
 750         } else if (m->from_etc_fstab)
 751                 r = exec_command_set(
 752                                 m->control_command,
 753                                 "/bin/mount",
 754                                 m->where,
 755                                 "-o", "remount",
 756                                 NULL);
 757         else
 758                 r = -ENOENT;
 759
 760         if (r < 0) {
 761                 r = -ENOMEM;
 762                 goto fail;
 763         }
 764
 765         mount_unwatch_control_pid(m);
 766
 767         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 768                 goto fail;
 769
 770         mount_set_state(m, MOUNT_REMOUNTING);
 771
 772         return;
 773
 774 fail:
 775         mount_enter_mounted(m, false);
 776 }
 777
 778 static int mount_start(Unit *u) {
 779         Mount *m = MOUNT(u);
 780
 781         assert(m);
 782
 783         /* We cannot fulfill this request right now, try again later
 784          * please! */
 785         if (m->state == MOUNT_UNMOUNTING ||
 786             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 787             m->state == MOUNT_UNMOUNTING_SIGKILL)
 788                 return -EAGAIN;
 789
 790         /* Already on it! */
 791         if (m->state == MOUNT_MOUNTING ||
 792             m->state == MOUNT_MOUNTING_SIGTERM ||
 793             m->state == MOUNT_MOUNTING_SIGKILL)
 794                 return 0;
 795
 796         assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTENANCE);
 797
 798         m->failure = false;
 799         mount_enter_mounting(m);
 800         return 0;
 801 }
 802
 803 static int mount_stop(Unit *u) {
 804         Mount *m = MOUNT(u);
 805
 806         assert(m);
 807
 808         /* Cann't do this right now. */
 809         if (m->state == MOUNT_MOUNTING ||
 810             m->state == MOUNT_MOUNTING_DONE ||
 811             m->state == MOUNT_MOUNTING_SIGTERM ||
 812             m->state == MOUNT_MOUNTING_SIGKILL ||
 813             m->state == MOUNT_REMOUNTING ||
 814             m->state == MOUNT_REMOUNTING_SIGTERM ||
 815             m->state == MOUNT_REMOUNTING_SIGKILL)
 816                 return -EAGAIN;
 817
 818         /* Already on it */
 819         if (m->state == MOUNT_UNMOUNTING ||
 820             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 821             m->state == MOUNT_UNMOUNTING_SIGTERM)
 822                 return 0;
 823
 824         assert(m->state == MOUNT_MOUNTED);
 825
 826         mount_enter_unmounting(m, true);
 827         return 0;
 828 }
 829
 830 static int mount_reload(Unit *u) {
 831         Mount *m = MOUNT(u);
 832
 833         assert(m);
 834
 835         if (m->state == MOUNT_MOUNTING_DONE)
 836                 return -EAGAIN;
 837
 838         assert(m->state == MOUNT_MOUNTED);
 839
 840         mount_enter_remounting(m, true);
 841         return 0;
 842 }
 843
 844 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
 845         Mount *m = MOUNT(u);
 846
 847         assert(m);
 848         assert(f);
 849         assert(fds);
 850
 851         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
 852         unit_serialize_item(u, f, "failure", yes_no(m->failure));
 853
 854         if (m->control_pid > 0)
 855                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
 856
 857         if (m->control_command_id >= 0)
 858                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
 859
 860         return 0;
 861 }
 862
 863 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
 864         Mount *m = MOUNT(u);
 865         int r;
 866
 867         assert(u);
 868         assert(key);
 869         assert(value);
 870         assert(fds);
 871
 872         if (streq(key, "state")) {
 873                 MountState state;
 874
 875                 if ((state = mount_state_from_string(value)) < 0)
 876                         log_debug("Failed to parse state value %s", value);
 877                 else
 878                         m->deserialized_state = state;
 879         } else if (streq(key, "failure")) {
 880                 int b;
 881
 882                 if ((b = parse_boolean(value)) < 0)
 883                         log_debug("Failed to parse failure value %s", value);
 884                 else
 885                         m->failure = b || m->failure;
 886
 887         } else if (streq(key, "control-pid")) {
 888                 pid_t pid;
 889
 890                 if ((r = parse_pid(value, &pid)) < 0)
 891                         log_debug("Failed to parse control-pid value %s", value);
 892                 else
 893                         m->control_pid = pid;
 894         } else if (streq(key, "control-command")) {
 895                 MountExecCommand id;
 896
 897                 if ((id = mount_exec_command_from_string(value)) < 0)
 898                         log_debug("Failed to parse exec-command value %s", value);
 899                 else {
 900                         m->control_command_id = id;
 901                         m->control_command = m->exec_command + id;
 902                 }
 903
 904         } else
 905                 log_debug("Unknown serialization key '%s'", key);
 906
 907         return 0;
 908 }
 909
 910 static UnitActiveState mount_active_state(Unit *u) {
 911         assert(u);
 912
 913         return state_translation_table[MOUNT(u)->state];
 914 }
 915
 916 static const char *mount_sub_state_to_string(Unit *u) {
 917         assert(u);
 918
 919         return mount_state_to_string(MOUNT(u)->state);
 920 }
 921
 922 static bool mount_check_gc(Unit *u) {
 923         Mount *m = MOUNT(u);
 924
 925         assert(m);
 926
 927         return m->from_etc_fstab || m->from_proc_self_mountinfo;
 928 }
 929
 930 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
 931         Mount *m = MOUNT(u);
 932         bool success;
 933
 934         assert(m);
 935         assert(pid >= 0);
 936
 937         if (pid != m->control_pid)
 938                 return;
 939
 940         m->control_pid = 0;
 941
 942         success = is_clean_exit(code, status);
 943         m->failure = m->failure || !success;
 944
 945         if (m->control_command) {
 946                 exec_status_exit(&m->control_command->exec_status, pid, code, status);
 947                 m->control_command = NULL;
 948                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 949         }
 950
 951         log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
 952
 953         /* Note that mount(8) returning and the kernel sending us a
 954          * mount table change event might happen out-of-order. If an
 955          * operation succeed we assume the kernel will follow soon too
 956          * and already change into the resulting state.  If it fails
 957          * we check if the kernel still knows about the mount. and
 958          * change state accordingly. */
 959
 960         switch (m->state) {
 961
 962         case MOUNT_MOUNTING:
 963         case MOUNT_MOUNTING_DONE:
 964         case MOUNT_MOUNTING_SIGKILL:
 965         case MOUNT_MOUNTING_SIGTERM:
 966         case MOUNT_REMOUNTING:
 967         case MOUNT_REMOUNTING_SIGKILL:
 968         case MOUNT_REMOUNTING_SIGTERM:
 969
 970                 if (success)
 971                         mount_enter_mounted(m, true);
 972                 else if (m->from_proc_self_mountinfo)
 973                         mount_enter_mounted(m, false);
 974                 else
 975                         mount_enter_dead(m, false);
 976                 break;
 977
 978         case MOUNT_UNMOUNTING:
 979         case MOUNT_UNMOUNTING_SIGKILL:
 980         case MOUNT_UNMOUNTING_SIGTERM:
 981
 982                 if (success)
 983                         mount_enter_dead(m, true);
 984                 else if (m->from_proc_self_mountinfo)
 985                         mount_enter_mounted(m, false);
 986                 else
 987                         mount_enter_dead(m, false);
 988                 break;
 989
 990         default:
 991                 assert_not_reached("Uh, control process died at wrong time.");
 992         }
 993 }
 994
 995 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
 996         Mount *m = MOUNT(u);
 997
 998         assert(m);
 999         assert(elapsed == 1);
1000         assert(w == &m->timer_watch);
1001
1002         switch (m->state) {
1003
1004         case MOUNT_MOUNTING:
1005         case MOUNT_MOUNTING_DONE:
1006                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1007                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1008                 break;
1009
1010         case MOUNT_REMOUNTING:
1011                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1012                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1013                 break;
1014
1015         case MOUNT_UNMOUNTING:
1016                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1017                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1018                 break;
1019
1020         case MOUNT_MOUNTING_SIGTERM:
1021                 log_warning("%s mounting timed out. Killing.", u->meta.id);
1022                 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1023                 break;
1024
1025         case MOUNT_REMOUNTING_SIGTERM:
1026                 log_warning("%s remounting timed out. Killing.", u->meta.id);
1027                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1028                 break;
1029
1030         case MOUNT_UNMOUNTING_SIGTERM:
1031                 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1032                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1033                 break;
1034
1035         case MOUNT_MOUNTING_SIGKILL:
1036         case MOUNT_REMOUNTING_SIGKILL:
1037         case MOUNT_UNMOUNTING_SIGKILL:
1038                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1039
1040                 if (m->from_proc_self_mountinfo)
1041                         mount_enter_mounted(m, false);
1042                 else
1043                         mount_enter_dead(m, false);
1044                 break;
1045
1046         default:
1047                 assert_not_reached("Timeout at wrong time.");
1048         }
1049 }
1050
1051 static int mount_add_one(
1052                 Manager *m,
1053                 const char *what,
1054                 const char *where,
1055                 const char *options,
1056                 const char *fstype,
1057                 bool from_proc_self_mountinfo,
1058                 bool set_flags) {
1059         int r;
1060         Unit *u;
1061         bool delete;
1062         char *e, *w = NULL, *o = NULL, *f = NULL;
1063         MountParameters *p;
1064
1065         assert(m);
1066         assert(what);
1067         assert(where);
1068         assert(options);
1069         assert(fstype);
1070
1071         assert(!set_flags || from_proc_self_mountinfo);
1072
1073         /* Ignore API mount points. They should never be referenced in
1074          * dependencies ever. */
1075         if (mount_point_is_api(where))
1076                 return 0;
1077
1078         if (streq(fstype, "autofs"))
1079                 return 0;
1080
1081         /* probably some kind of swap, ignore */
1082         if (!is_path(where))
1083                 return 0;
1084
1085         if (!(e = unit_name_from_path(where, ".mount")))
1086                 return -ENOMEM;
1087
1088         if (!(u = manager_get_unit(m, e))) {
1089                 delete = true;
1090
1091                 if (!(u = unit_new(m))) {
1092                         free(e);
1093                         return -ENOMEM;
1094                 }
1095
1096                 r = unit_add_name(u, e);
1097                 free(e);
1098
1099                 if (r < 0)
1100                         goto fail;
1101
1102                 if (!(MOUNT(u)->where = strdup(where))) {
1103                         r = -ENOMEM;
1104                         goto fail;
1105                 }
1106
1107                 unit_add_to_load_queue(u);
1108         } else {
1109                 delete = false;
1110                 free(e);
1111         }
1112
1113         if (!(w = strdup(what)) ||
1114             !(o = strdup(options)) ||
1115             !(f = strdup(fstype))) {
1116                 r = -ENOMEM;
1117                 goto fail;
1118         }
1119
1120         if (from_proc_self_mountinfo) {
1121                 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1122
1123                 if (set_flags) {
1124                         MOUNT(u)->is_mounted = true;
1125                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1126                         MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1127                 }
1128
1129                 MOUNT(u)->from_proc_self_mountinfo = true;
1130         } else {
1131                 p = &MOUNT(u)->parameters_etc_fstab;
1132                 MOUNT(u)->from_etc_fstab = true;
1133         }
1134
1135         free(p->what);
1136         p->what = w;
1137
1138         free(p->options);
1139         p->options = o;
1140
1141         free(p->fstype);
1142         p->fstype = f;
1143
1144         unit_add_to_dbus_queue(u);
1145
1146         return 0;
1147
1148 fail:
1149         free(w);
1150         free(o);
1151         free(f);
1152
1153         if (delete && u)
1154                 unit_free(u);
1155
1156         return r;
1157 }
1158
1159 static char *fstab_node_to_udev_node(char *p) {
1160         char *dn, *t;
1161         int r;
1162
1163         /* FIXME: to follow udev's logic 100% we need to leave valid
1164          * UTF8 chars unescaped */
1165
1166         if (startswith(p, "LABEL=")) {
1167
1168                 if (!(t = xescape(p+6, "/ ")))
1169                         return NULL;
1170
1171                 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1172                 free(t);
1173
1174                 if (r < 0)
1175                         return NULL;
1176
1177                 return dn;
1178         }
1179
1180         if (startswith(p, "UUID=")) {
1181
1182                 if (!(t = xescape(p+5, "/ ")))
1183                         return NULL;
1184
1185                 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1186                 free(t);
1187
1188                 if (r < 0)
1189                         return NULL;
1190
1191                 return dn;
1192         }
1193
1194         return strdup(p);
1195 }
1196
1197 static int mount_find_pri(char *options) {
1198         char *end, *pri;
1199         unsigned long r;
1200
1201         if (!(pri = mount_test_option(options, "pri=")))
1202                 return 0;
1203
1204         pri += 4;
1205
1206         errno = 0;
1207         r = strtoul(pri, &end, 10);
1208
1209         if (errno != 0)
1210                 return -errno;
1211
1212         if (end == pri || (*end != ',' && *end != 0))
1213                 return -EINVAL;
1214
1215         return (int) r;
1216 }
1217
1218 static int mount_load_etc_fstab(Manager *m) {
1219         FILE *f;
1220         int r;
1221         struct mntent* me;
1222
1223         assert(m);
1224
1225         errno = 0;
1226         if (!(f = setmntent("/etc/fstab", "r")))
1227                 return -errno;
1228
1229         while ((me = getmntent(f))) {
1230                 char *where, *what;
1231
1232                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1233                         r = -ENOMEM;
1234                         goto finish;
1235                 }
1236
1237                 if (!(where = strdup(me->mnt_dir))) {
1238                         free(what);
1239                         r = -ENOMEM;
1240                         goto finish;
1241                 }
1242
1243                 if (what[0] == '/')
1244                         path_kill_slashes(what);
1245
1246                 if (where[0] == '/')
1247                         path_kill_slashes(where);
1248
1249                 if (streq(me->mnt_type, "swap")) {
1250                         int pri;
1251
1252                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1253                                 r = pri;
1254                         else
1255                                 r = swap_add_one(m,
1256                                                  what,
1257                                                  pri,
1258                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1259                                                  !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1260                                                  false);
1261                 } else
1262                         r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1263
1264                 free(what);
1265                 free(where);
1266
1267                 if (r < 0)
1268                         goto finish;
1269         }
1270
1271         r = 0;
1272 finish:
1273
1274         endmntent(f);
1275         return r;
1276 }
1277
1278 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1279         int r;
1280         char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1281
1282         assert(m);
1283
1284         rewind(m->proc_self_mountinfo);
1285
1286         for (;;) {
1287                 int k;
1288
1289                 device = path = options = options2 = fstype = d = p = o = NULL;
1290
1291                 if ((k = fscanf(m->proc_self_mountinfo,
1292                                 "%*s "       /* (1) mount id */
1293                                 "%*s "       /* (2) parent id */
1294                                 "%*s "       /* (3) major:minor */
1295                                 "%*s "       /* (4) root */
1296                                 "%ms "       /* (5) mount point */
1297                                 "%ms"        /* (6) mount options */
1298                                 "%*[^-]"     /* (7) optional fields */
1299                                 "- "         /* (8) seperator */
1300                                 "%ms "       /* (9) file system type */
1301                                 "%ms"        /* (10) mount source */
1302                                 "%ms"        /* (11) mount options 2 */
1303                                 "%*[^\n]",   /* some rubbish at the end */
1304                                 &path,
1305                                 &options,
1306                                 &fstype,
1307                                 &device,
1308                                 &options2)) != 5) {
1309
1310                         if (k == EOF)
1311                                 break;
1312
1313                         r = -EBADMSG;
1314                         goto finish;
1315                 }
1316
1317                 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1318                         r = -ENOMEM;
1319                         goto finish;
1320                 }
1321
1322                 if (!(d = cunescape(device)) ||
1323                     !(p = cunescape(path))) {
1324                         r = -ENOMEM;
1325                         goto finish;
1326                 }
1327
1328                 if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1329                         goto finish;
1330
1331                 free(device);
1332                 free(path);
1333                 free(options);
1334                 free(options2);
1335                 free(fstype);
1336                 free(d);
1337                 free(p);
1338                 free(o);
1339         }
1340
1341         r = 0;
1342
1343 finish:
1344         free(device);
1345         free(path);
1346         free(options);
1347         free(options2);
1348         free(fstype);
1349         free(d);
1350         free(p);
1351         free(o);
1352
1353         return r;
1354 }
1355
1356 static void mount_shutdown(Manager *m) {
1357         assert(m);
1358
1359         if (m->proc_self_mountinfo) {
1360                 fclose(m->proc_self_mountinfo);
1361                 m->proc_self_mountinfo = NULL;
1362         }
1363 }
1364
1365 static int mount_enumerate(Manager *m) {
1366         int r;
1367         struct epoll_event ev;
1368         assert(m);
1369
1370         if (!m->proc_self_mountinfo) {
1371                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1372                         return -errno;
1373
1374                 m->mount_watch.type = WATCH_MOUNT;
1375                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1376
1377                 zero(ev);
1378                 ev.events = EPOLLERR;
1379                 ev.data.ptr = &m->mount_watch;
1380
1381                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1382                         return -errno;
1383         }
1384
1385         if ((r = mount_load_etc_fstab(m)) < 0)
1386                 goto fail;
1387
1388         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1389                 goto fail;
1390
1391         return 0;
1392
1393 fail:
1394         mount_shutdown(m);
1395         return r;
1396 }
1397
1398 void mount_fd_event(Manager *m, int events) {
1399         Meta *meta;
1400         int r;
1401
1402         assert(m);
1403         assert(events == EPOLLERR);
1404
1405         /* The manager calls this for every fd event happening on the
1406          * /proc/self/mountinfo file, which informs us about mounting
1407          * table changes */
1408
1409         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1410                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(errno));
1411
1412                 /* Reset flags, just in case, for later calls */
1413                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1414                         Mount *mount = (Mount*) meta;
1415
1416                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1417                 }
1418
1419                 return;
1420         }
1421
1422         manager_dispatch_load_queue(m);
1423
1424         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1425                 Mount *mount = (Mount*) meta;
1426
1427                 if (!mount->is_mounted) {
1428                         /* This has just been unmounted. */
1429
1430                         mount->from_proc_self_mountinfo = false;
1431
1432                         switch (mount->state) {
1433
1434                         case MOUNT_MOUNTED:
1435                                 mount_enter_dead(mount, true);
1436                                 break;
1437
1438                         default:
1439                                 mount_set_state(mount, mount->state);
1440                                 break;
1441
1442                         }
1443
1444                 } else if (mount->just_mounted || mount->just_changed) {
1445
1446                         /* New or changed entrymount */
1447
1448                         switch (mount->state) {
1449
1450                         case MOUNT_DEAD:
1451                         case MOUNT_MAINTENANCE:
1452                                 mount_enter_mounted(mount, true);
1453                                 break;
1454
1455                         case MOUNT_MOUNTING:
1456                                 mount_enter_mounting_done(mount);
1457                                 break;
1458
1459                         default:
1460                                 /* Nothing really changed, but let's
1461                                  * issue an notification call
1462                                  * nonetheless, in case somebody is
1463                                  * waiting for this. (e.g. file system
1464                                  * ro/rw remounts.) */
1465                                 mount_set_state(mount, mount->state);
1466                                 break;
1467                         }
1468                 }
1469
1470                 /* Reset the flags for later calls */
1471                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1472         }
1473 }
1474
1475 int mount_path_is_mounted(Manager *m, const char* path) {
1476         char *t;
1477         int r;
1478
1479         assert(m);
1480         assert(path);
1481
1482         if (path[0] != '/')
1483                 return 1;
1484
1485         if (!(t = strdup(path)))
1486                 return -ENOMEM;
1487
1488         path_kill_slashes(t);
1489
1490         for (;;) {
1491                 char *e, *slash;
1492                 Unit *u;
1493
1494                 if (!(e = unit_name_from_path(t, ".mount"))) {
1495                         r = -ENOMEM;
1496                         goto finish;
1497                 }
1498
1499                 u = manager_get_unit(m, e);
1500                 free(e);
1501
1502                 if (u &&
1503                     (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1504                     MOUNT(u)->state != MOUNT_MOUNTED) {
1505                         r = 0;
1506                         goto finish;
1507                 }
1508
1509                 assert_se(slash = strrchr(t, '/'));
1510
1511                 if (slash == t) {
1512                         r = 1;
1513                         goto finish;
1514                 }
1515
1516                 *slash = 0;
1517         }
1518
1519         r = 1;
1520
1521 finish:
1522         free(t);
1523         return r;
1524 }
1525
1526 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1527         [MOUNT_DEAD] = "dead",
1528         [MOUNT_MOUNTING] = "mounting",
1529         [MOUNT_MOUNTING_DONE] = "mounting-done",
1530         [MOUNT_MOUNTED] = "mounted",
1531         [MOUNT_REMOUNTING] = "remounting",
1532         [MOUNT_UNMOUNTING] = "unmounting",
1533         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1534         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1535         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1536         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1537         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1538         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1539         [MOUNT_MAINTENANCE] = "maintenance"
1540 };
1541
1542 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1543
1544 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1545         [MOUNT_EXEC_MOUNT] = "ExecMount",
1546         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1547         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1548 };
1549
1550 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1551
1552 const UnitVTable mount_vtable = {
1553         .suffix = ".mount",
1554
1555         .no_alias = true,
1556         .no_instances = true,
1557         .no_isolate = true,
1558         .show_status = true,
1559
1560         .init = mount_init,
1561         .load = mount_load,
1562         .done = mount_done,
1563
1564         .coldplug = mount_coldplug,
1565
1566         .dump = mount_dump,
1567
1568         .start = mount_start,
1569         .stop = mount_stop,
1570         .reload = mount_reload,
1571
1572         .serialize = mount_serialize,
1573         .deserialize_item = mount_deserialize_item,
1574
1575         .active_state = mount_active_state,
1576         .sub_state_to_string = mount_sub_state_to_string,
1577
1578         .check_gc = mount_check_gc,
1579
1580         .sigchld_event = mount_sigchld_event,
1581         .timer_event = mount_timer_event,
1582
1583         .bus_message_handler = bus_mount_message_handler,
1584
1585         .enumerate = mount_enumerate,
1586         .shutdown = mount_shutdown
1587 };