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->exec_context.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                 "%sDirectoryMode: %04o\n",
 505                 prefix, mount_state_to_string(m->state),
 506                 prefix, m->where,
 507                 prefix, strna(p->what),
 508                 prefix, strna(p->fstype),
 509                 prefix, strna(p->options),
 510                 prefix, yes_no(m->from_etc_fstab),
 511                 prefix, yes_no(m->from_proc_self_mountinfo),
 512                 prefix, yes_no(m->from_fragment),
 513                 prefix, m->directory_mode);
 514
 515         if (m->control_pid > 0)
 516                 fprintf(f,
 517                         "%sControl PID: %lu\n",
 518                         prefix, (unsigned long) m->control_pid);
 519
 520         exec_context_dump(&m->exec_context, f, prefix);
 521 }
 522
 523 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 524         pid_t pid;
 525         int r;
 526
 527         assert(m);
 528         assert(c);
 529         assert(_pid);
 530
 531         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 532                 goto fail;
 533
 534         if ((r = exec_spawn(c,
 535                             NULL,
 536                             &m->exec_context,
 537                             NULL, 0,
 538                             m->meta.manager->environment,
 539                             true,
 540                             true,
 541                             true,
 542                             m->meta.manager->confirm_spawn,
 543                             m->meta.cgroup_bondings,
 544                             &pid)) < 0)
 545                 goto fail;
 546
 547         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 548                 /* FIXME: we need to do something here */
 549                 goto fail;
 550
 551         *_pid = pid;
 552
 553         return 0;
 554
 555 fail:
 556         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 557
 558         return r;
 559 }
 560
 561 static void mount_enter_dead(Mount *m, bool success) {
 562         assert(m);
 563
 564         if (!success)
 565                 m->failure = true;
 566
 567         mount_set_state(m, m->failure ? MOUNT_MAINTENANCE : MOUNT_DEAD);
 568 }
 569
 570 static void mount_enter_mounted(Mount *m, bool success) {
 571         assert(m);
 572
 573         if (!success)
 574                 m->failure = true;
 575
 576         mount_set_state(m, MOUNT_MOUNTED);
 577 }
 578
 579 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 580         int r;
 581         bool sent = false;
 582
 583         assert(m);
 584
 585         if (!success)
 586                 m->failure = true;
 587
 588         if (m->exec_context.kill_mode != KILL_NONE) {
 589                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 590                            state == MOUNT_UNMOUNTING_SIGTERM ||
 591                            state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
 592
 593                 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
 594
 595                         if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig)) < 0) {
 596                                 if (r != -EAGAIN && r != -ESRCH)
 597                                         goto fail;
 598                         } else
 599                                 sent = true;
 600                 }
 601
 602                 if (!sent && m->control_pid > 0)
 603                         if (kill(m->exec_context.kill_mode == KILL_PROCESS ?
 604                                  m->control_pid :
 605                                  -m->control_pid, sig) < 0 && errno != ESRCH) {
 606
 607                                 r = -errno;
 608                                 goto fail;
 609                         }
 610         }
 611
 612         if (sent) {
 613                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 614                         goto fail;
 615
 616                 mount_set_state(m, state);
 617         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 618                 mount_enter_mounted(m, true);
 619         else
 620                 mount_enter_dead(m, true);
 621
 622         return;
 623
 624 fail:
 625         log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
 626
 627         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 628                 mount_enter_mounted(m, false);
 629         else
 630                 mount_enter_dead(m, false);
 631 }
 632
 633 static void mount_enter_unmounting(Mount *m, bool success) {
 634         int r;
 635
 636         assert(m);
 637
 638         if (!success)
 639                 m->failure = true;
 640
 641         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 642         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 643
 644         if ((r = exec_command_set(
 645                              m->control_command,
 646                              "/bin/umount",
 647                              m->where,
 648                              NULL)) < 0)
 649                 goto fail;
 650
 651         mount_unwatch_control_pid(m);
 652
 653         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 654                 goto fail;
 655
 656         mount_set_state(m, MOUNT_UNMOUNTING);
 657
 658         return;
 659
 660 fail:
 661         log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
 662         mount_enter_mounted(m, false);
 663 }
 664
 665 static void mount_enter_mounting(Mount *m) {
 666         int r;
 667
 668         assert(m);
 669
 670         m->control_command_id = MOUNT_EXEC_MOUNT;
 671         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 672
 673         mkdir_p(m->where, m->directory_mode);
 674
 675         if (m->from_fragment)
 676                 r = exec_command_set(
 677                                 m->control_command,
 678                                 "/bin/mount",
 679                                 m->parameters_fragment.what,
 680                                 m->where,
 681                                 "-t", m->parameters_fragment.fstype,
 682                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 683                                 NULL);
 684         else if (m->from_etc_fstab)
 685                 r = exec_command_set(
 686                                 m->control_command,
 687                                 "/bin/mount",
 688                                 m->where,
 689                                 NULL);
 690         else
 691                 r = -ENOENT;
 692
 693         if (r < 0)
 694                 goto fail;
 695
 696         mount_unwatch_control_pid(m);
 697
 698         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 699                 goto fail;
 700
 701         mount_set_state(m, MOUNT_MOUNTING);
 702
 703         return;
 704
 705 fail:
 706         log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
 707         mount_enter_dead(m, false);
 708 }
 709
 710 static void mount_enter_mounting_done(Mount *m) {
 711         assert(m);
 712
 713         mount_set_state(m, MOUNT_MOUNTING_DONE);
 714 }
 715
 716 static void mount_enter_remounting(Mount *m, bool success) {
 717         int r;
 718
 719         assert(m);
 720
 721         if (!success)
 722                 m->failure = true;
 723
 724         m->control_command_id = MOUNT_EXEC_REMOUNT;
 725         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 726
 727         if (m->from_fragment) {
 728                 char *buf = NULL;
 729                 const char *o;
 730
 731                 if (m->parameters_fragment.options) {
 732                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 733                                 r = -ENOMEM;
 734                                 goto fail;
 735                         }
 736
 737                         o = buf;
 738                 } else
 739                         o = "remount";
 740
 741                 r = exec_command_set(
 742                                 m->control_command,
 743                                 "/bin/mount",
 744                                 m->parameters_fragment.what,
 745                                 m->where,
 746                                 "-t", m->parameters_fragment.fstype,
 747                                 "-o", o,
 748                                 NULL);
 749
 750                 free(buf);
 751         } else if (m->from_etc_fstab)
 752                 r = exec_command_set(
 753                                 m->control_command,
 754                                 "/bin/mount",
 755                                 m->where,
 756                                 "-o", "remount",
 757                                 NULL);
 758         else
 759                 r = -ENOENT;
 760
 761         if (r < 0) {
 762                 r = -ENOMEM;
 763                 goto fail;
 764         }
 765
 766         mount_unwatch_control_pid(m);
 767
 768         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 769                 goto fail;
 770
 771         mount_set_state(m, MOUNT_REMOUNTING);
 772
 773         return;
 774
 775 fail:
 776         mount_enter_mounted(m, false);
 777 }
 778
 779 static int mount_start(Unit *u) {
 780         Mount *m = MOUNT(u);
 781
 782         assert(m);
 783
 784         /* We cannot fulfill this request right now, try again later
 785          * please! */
 786         if (m->state == MOUNT_UNMOUNTING ||
 787             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 788             m->state == MOUNT_UNMOUNTING_SIGKILL)
 789                 return -EAGAIN;
 790
 791         /* Already on it! */
 792         if (m->state == MOUNT_MOUNTING ||
 793             m->state == MOUNT_MOUNTING_SIGTERM ||
 794             m->state == MOUNT_MOUNTING_SIGKILL)
 795                 return 0;
 796
 797         assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTENANCE);
 798
 799         m->failure = false;
 800         mount_enter_mounting(m);
 801         return 0;
 802 }
 803
 804 static int mount_stop(Unit *u) {
 805         Mount *m = MOUNT(u);
 806
 807         assert(m);
 808
 809         /* Cann't do this right now. */
 810         if (m->state == MOUNT_MOUNTING ||
 811             m->state == MOUNT_MOUNTING_DONE ||
 812             m->state == MOUNT_MOUNTING_SIGTERM ||
 813             m->state == MOUNT_MOUNTING_SIGKILL ||
 814             m->state == MOUNT_REMOUNTING ||
 815             m->state == MOUNT_REMOUNTING_SIGTERM ||
 816             m->state == MOUNT_REMOUNTING_SIGKILL)
 817                 return -EAGAIN;
 818
 819         /* Already on it */
 820         if (m->state == MOUNT_UNMOUNTING ||
 821             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 822             m->state == MOUNT_UNMOUNTING_SIGTERM)
 823                 return 0;
 824
 825         assert(m->state == MOUNT_MOUNTED);
 826
 827         mount_enter_unmounting(m, true);
 828         return 0;
 829 }
 830
 831 static int mount_reload(Unit *u) {
 832         Mount *m = MOUNT(u);
 833
 834         assert(m);
 835
 836         if (m->state == MOUNT_MOUNTING_DONE)
 837                 return -EAGAIN;
 838
 839         assert(m->state == MOUNT_MOUNTED);
 840
 841         mount_enter_remounting(m, true);
 842         return 0;
 843 }
 844
 845 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
 846         Mount *m = MOUNT(u);
 847
 848         assert(m);
 849         assert(f);
 850         assert(fds);
 851
 852         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
 853         unit_serialize_item(u, f, "failure", yes_no(m->failure));
 854
 855         if (m->control_pid > 0)
 856                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
 857
 858         if (m->control_command_id >= 0)
 859                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
 860
 861         return 0;
 862 }
 863
 864 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
 865         Mount *m = MOUNT(u);
 866         int r;
 867
 868         assert(u);
 869         assert(key);
 870         assert(value);
 871         assert(fds);
 872
 873         if (streq(key, "state")) {
 874                 MountState state;
 875
 876                 if ((state = mount_state_from_string(value)) < 0)
 877                         log_debug("Failed to parse state value %s", value);
 878                 else
 879                         m->deserialized_state = state;
 880         } else if (streq(key, "failure")) {
 881                 int b;
 882
 883                 if ((b = parse_boolean(value)) < 0)
 884                         log_debug("Failed to parse failure value %s", value);
 885                 else
 886                         m->failure = b || m->failure;
 887
 888         } else if (streq(key, "control-pid")) {
 889                 pid_t pid;
 890
 891                 if ((r = parse_pid(value, &pid)) < 0)
 892                         log_debug("Failed to parse control-pid value %s", value);
 893                 else
 894                         m->control_pid = pid;
 895         } else if (streq(key, "control-command")) {
 896                 MountExecCommand id;
 897
 898                 if ((id = mount_exec_command_from_string(value)) < 0)
 899                         log_debug("Failed to parse exec-command value %s", value);
 900                 else {
 901                         m->control_command_id = id;
 902                         m->control_command = m->exec_command + id;
 903                 }
 904
 905         } else
 906                 log_debug("Unknown serialization key '%s'", key);
 907
 908         return 0;
 909 }
 910
 911 static UnitActiveState mount_active_state(Unit *u) {
 912         assert(u);
 913
 914         return state_translation_table[MOUNT(u)->state];
 915 }
 916
 917 static const char *mount_sub_state_to_string(Unit *u) {
 918         assert(u);
 919
 920         return mount_state_to_string(MOUNT(u)->state);
 921 }
 922
 923 static bool mount_check_gc(Unit *u) {
 924         Mount *m = MOUNT(u);
 925
 926         assert(m);
 927
 928         return m->from_etc_fstab || m->from_proc_self_mountinfo;
 929 }
 930
 931 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
 932         Mount *m = MOUNT(u);
 933         bool success;
 934
 935         assert(m);
 936         assert(pid >= 0);
 937
 938         if (pid != m->control_pid)
 939                 return;
 940
 941         m->control_pid = 0;
 942
 943         success = is_clean_exit(code, status);
 944         m->failure = m->failure || !success;
 945
 946         if (m->control_command) {
 947                 exec_status_exit(&m->control_command->exec_status, pid, code, status);
 948                 m->control_command = NULL;
 949                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 950         }
 951
 952         log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
 953
 954         /* Note that mount(8) returning and the kernel sending us a
 955          * mount table change event might happen out-of-order. If an
 956          * operation succeed we assume the kernel will follow soon too
 957          * and already change into the resulting state.  If it fails
 958          * we check if the kernel still knows about the mount. and
 959          * change state accordingly. */
 960
 961         switch (m->state) {
 962
 963         case MOUNT_MOUNTING:
 964         case MOUNT_MOUNTING_DONE:
 965         case MOUNT_MOUNTING_SIGKILL:
 966         case MOUNT_MOUNTING_SIGTERM:
 967         case MOUNT_REMOUNTING:
 968         case MOUNT_REMOUNTING_SIGKILL:
 969         case MOUNT_REMOUNTING_SIGTERM:
 970
 971                 if (success)
 972                         mount_enter_mounted(m, true);
 973                 else if (m->from_proc_self_mountinfo)
 974                         mount_enter_mounted(m, false);
 975                 else
 976                         mount_enter_dead(m, false);
 977                 break;
 978
 979         case MOUNT_UNMOUNTING:
 980         case MOUNT_UNMOUNTING_SIGKILL:
 981         case MOUNT_UNMOUNTING_SIGTERM:
 982
 983                 if (success)
 984                         mount_enter_dead(m, true);
 985                 else if (m->from_proc_self_mountinfo)
 986                         mount_enter_mounted(m, false);
 987                 else
 988                         mount_enter_dead(m, false);
 989                 break;
 990
 991         default:
 992                 assert_not_reached("Uh, control process died at wrong time.");
 993         }
 994 }
 995
 996 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
 997         Mount *m = MOUNT(u);
 998
 999         assert(m);
1000         assert(elapsed == 1);
1001         assert(w == &m->timer_watch);
1002
1003         switch (m->state) {
1004
1005         case MOUNT_MOUNTING:
1006         case MOUNT_MOUNTING_DONE:
1007                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1008                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1009                 break;
1010
1011         case MOUNT_REMOUNTING:
1012                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1013                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1014                 break;
1015
1016         case MOUNT_UNMOUNTING:
1017                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1018                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1019                 break;
1020
1021         case MOUNT_MOUNTING_SIGTERM:
1022                 log_warning("%s mounting timed out. Killing.", u->meta.id);
1023                 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1024                 break;
1025
1026         case MOUNT_REMOUNTING_SIGTERM:
1027                 log_warning("%s remounting timed out. Killing.", u->meta.id);
1028                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1029                 break;
1030
1031         case MOUNT_UNMOUNTING_SIGTERM:
1032                 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1033                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1034                 break;
1035
1036         case MOUNT_MOUNTING_SIGKILL:
1037         case MOUNT_REMOUNTING_SIGKILL:
1038         case MOUNT_UNMOUNTING_SIGKILL:
1039                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1040
1041                 if (m->from_proc_self_mountinfo)
1042                         mount_enter_mounted(m, false);
1043                 else
1044                         mount_enter_dead(m, false);
1045                 break;
1046
1047         default:
1048                 assert_not_reached("Timeout at wrong time.");
1049         }
1050 }
1051
1052 static int mount_add_one(
1053                 Manager *m,
1054                 const char *what,
1055                 const char *where,
1056                 const char *options,
1057                 const char *fstype,
1058                 bool from_proc_self_mountinfo,
1059                 bool set_flags) {
1060         int r;
1061         Unit *u;
1062         bool delete;
1063         char *e, *w = NULL, *o = NULL, *f = NULL;
1064         MountParameters *p;
1065
1066         assert(m);
1067         assert(what);
1068         assert(where);
1069         assert(options);
1070         assert(fstype);
1071
1072         assert(!set_flags || from_proc_self_mountinfo);
1073
1074         /* Ignore API mount points. They should never be referenced in
1075          * dependencies ever. */
1076         if (mount_point_is_api(where))
1077                 return 0;
1078
1079         if (streq(fstype, "autofs"))
1080                 return 0;
1081
1082         /* probably some kind of swap, ignore */
1083         if (!is_path(where))
1084                 return 0;
1085
1086         if (!(e = unit_name_from_path(where, ".mount")))
1087                 return -ENOMEM;
1088
1089         if (!(u = manager_get_unit(m, e))) {
1090                 delete = true;
1091
1092                 if (!(u = unit_new(m))) {
1093                         free(e);
1094                         return -ENOMEM;
1095                 }
1096
1097                 r = unit_add_name(u, e);
1098                 free(e);
1099
1100                 if (r < 0)
1101                         goto fail;
1102
1103                 if (!(MOUNT(u)->where = strdup(where))) {
1104                         r = -ENOMEM;
1105                         goto fail;
1106                 }
1107
1108                 unit_add_to_load_queue(u);
1109         } else {
1110                 delete = false;
1111                 free(e);
1112         }
1113
1114         if (!(w = strdup(what)) ||
1115             !(o = strdup(options)) ||
1116             !(f = strdup(fstype))) {
1117                 r = -ENOMEM;
1118                 goto fail;
1119         }
1120
1121         if (from_proc_self_mountinfo) {
1122                 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1123
1124                 if (set_flags) {
1125                         MOUNT(u)->is_mounted = true;
1126                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1127                         MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1128                 }
1129
1130                 MOUNT(u)->from_proc_self_mountinfo = true;
1131         } else {
1132                 p = &MOUNT(u)->parameters_etc_fstab;
1133                 MOUNT(u)->from_etc_fstab = true;
1134         }
1135
1136         free(p->what);
1137         p->what = w;
1138
1139         free(p->options);
1140         p->options = o;
1141
1142         free(p->fstype);
1143         p->fstype = f;
1144
1145         unit_add_to_dbus_queue(u);
1146
1147         return 0;
1148
1149 fail:
1150         free(w);
1151         free(o);
1152         free(f);
1153
1154         if (delete && u)
1155                 unit_free(u);
1156
1157         return r;
1158 }
1159
1160 static char *fstab_node_to_udev_node(char *p) {
1161         char *dn, *t;
1162         int r;
1163
1164         /* FIXME: to follow udev's logic 100% we need to leave valid
1165          * UTF8 chars unescaped */
1166
1167         if (startswith(p, "LABEL=")) {
1168
1169                 if (!(t = xescape(p+6, "/ ")))
1170                         return NULL;
1171
1172                 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1173                 free(t);
1174
1175                 if (r < 0)
1176                         return NULL;
1177
1178                 return dn;
1179         }
1180
1181         if (startswith(p, "UUID=")) {
1182
1183                 if (!(t = xescape(p+5, "/ ")))
1184                         return NULL;
1185
1186                 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1187                 free(t);
1188
1189                 if (r < 0)
1190                         return NULL;
1191
1192                 return dn;
1193         }
1194
1195         return strdup(p);
1196 }
1197
1198 static int mount_find_pri(char *options) {
1199         char *end, *pri;
1200         unsigned long r;
1201
1202         if (!(pri = mount_test_option(options, "pri=")))
1203                 return 0;
1204
1205         pri += 4;
1206
1207         errno = 0;
1208         r = strtoul(pri, &end, 10);
1209
1210         if (errno != 0)
1211                 return -errno;
1212
1213         if (end == pri || (*end != ',' && *end != 0))
1214                 return -EINVAL;
1215
1216         return (int) r;
1217 }
1218
1219 static int mount_load_etc_fstab(Manager *m) {
1220         FILE *f;
1221         int r;
1222         struct mntent* me;
1223
1224         assert(m);
1225
1226         errno = 0;
1227         if (!(f = setmntent("/etc/fstab", "r")))
1228                 return -errno;
1229
1230         while ((me = getmntent(f))) {
1231                 char *where, *what;
1232
1233                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1234                         r = -ENOMEM;
1235                         goto finish;
1236                 }
1237
1238                 if (!(where = strdup(me->mnt_dir))) {
1239                         free(what);
1240                         r = -ENOMEM;
1241                         goto finish;
1242                 }
1243
1244                 if (what[0] == '/')
1245                         path_kill_slashes(what);
1246
1247                 if (where[0] == '/')
1248                         path_kill_slashes(where);
1249
1250                 if (streq(me->mnt_type, "swap")) {
1251                         int pri;
1252
1253                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1254                                 r = pri;
1255                         else
1256                                 r = swap_add_one(m,
1257                                                  what,
1258                                                  pri,
1259                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1260                                                  !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1261                                                  false);
1262                 } else
1263                         r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1264
1265                 free(what);
1266                 free(where);
1267
1268                 if (r < 0)
1269                         goto finish;
1270         }
1271
1272         r = 0;
1273 finish:
1274
1275         endmntent(f);
1276         return r;
1277 }
1278
1279 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1280         int r;
1281         char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1282
1283         assert(m);
1284
1285         rewind(m->proc_self_mountinfo);
1286
1287         for (;;) {
1288                 int k;
1289
1290                 device = path = options = options2 = fstype = d = p = o = NULL;
1291
1292                 if ((k = fscanf(m->proc_self_mountinfo,
1293                                 "%*s "       /* (1) mount id */
1294                                 "%*s "       /* (2) parent id */
1295                                 "%*s "       /* (3) major:minor */
1296                                 "%*s "       /* (4) root */
1297                                 "%ms "       /* (5) mount point */
1298                                 "%ms"        /* (6) mount options */
1299                                 "%*[^-]"     /* (7) optional fields */
1300                                 "- "         /* (8) seperator */
1301                                 "%ms "       /* (9) file system type */
1302                                 "%ms"        /* (10) mount source */
1303                                 "%ms"        /* (11) mount options 2 */
1304                                 "%*[^\n]",   /* some rubbish at the end */
1305                                 &path,
1306                                 &options,
1307                                 &fstype,
1308                                 &device,
1309                                 &options2)) != 5) {
1310
1311                         if (k == EOF)
1312                                 break;
1313
1314                         r = -EBADMSG;
1315                         goto finish;
1316                 }
1317
1318                 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1319                         r = -ENOMEM;
1320                         goto finish;
1321                 }
1322
1323                 if (!(d = cunescape(device)) ||
1324                     !(p = cunescape(path))) {
1325                         r = -ENOMEM;
1326                         goto finish;
1327                 }
1328
1329                 if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1330                         goto finish;
1331
1332                 free(device);
1333                 free(path);
1334                 free(options);
1335                 free(options2);
1336                 free(fstype);
1337                 free(d);
1338                 free(p);
1339                 free(o);
1340         }
1341
1342         r = 0;
1343
1344 finish:
1345         free(device);
1346         free(path);
1347         free(options);
1348         free(options2);
1349         free(fstype);
1350         free(d);
1351         free(p);
1352         free(o);
1353
1354         return r;
1355 }
1356
1357 static void mount_shutdown(Manager *m) {
1358         assert(m);
1359
1360         if (m->proc_self_mountinfo) {
1361                 fclose(m->proc_self_mountinfo);
1362                 m->proc_self_mountinfo = NULL;
1363         }
1364 }
1365
1366 static int mount_enumerate(Manager *m) {
1367         int r;
1368         struct epoll_event ev;
1369         assert(m);
1370
1371         if (!m->proc_self_mountinfo) {
1372                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1373                         return -errno;
1374
1375                 m->mount_watch.type = WATCH_MOUNT;
1376                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1377
1378                 zero(ev);
1379                 ev.events = EPOLLERR;
1380                 ev.data.ptr = &m->mount_watch;
1381
1382                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1383                         return -errno;
1384         }
1385
1386         if ((r = mount_load_etc_fstab(m)) < 0)
1387                 goto fail;
1388
1389         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1390                 goto fail;
1391
1392         return 0;
1393
1394 fail:
1395         mount_shutdown(m);
1396         return r;
1397 }
1398
1399 void mount_fd_event(Manager *m, int events) {
1400         Meta *meta;
1401         int r;
1402
1403         assert(m);
1404         assert(events == EPOLLERR);
1405
1406         /* The manager calls this for every fd event happening on the
1407          * /proc/self/mountinfo file, which informs us about mounting
1408          * table changes */
1409
1410         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1411                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(errno));
1412
1413                 /* Reset flags, just in case, for later calls */
1414                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1415                         Mount *mount = (Mount*) meta;
1416
1417                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1418                 }
1419
1420                 return;
1421         }
1422
1423         manager_dispatch_load_queue(m);
1424
1425         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1426                 Mount *mount = (Mount*) meta;
1427
1428                 if (!mount->is_mounted) {
1429                         /* This has just been unmounted. */
1430
1431                         mount->from_proc_self_mountinfo = false;
1432
1433                         switch (mount->state) {
1434
1435                         case MOUNT_MOUNTED:
1436                                 mount_enter_dead(mount, true);
1437                                 break;
1438
1439                         default:
1440                                 mount_set_state(mount, mount->state);
1441                                 break;
1442
1443                         }
1444
1445                 } else if (mount->just_mounted || mount->just_changed) {
1446
1447                         /* New or changed entrymount */
1448
1449                         switch (mount->state) {
1450
1451                         case MOUNT_DEAD:
1452                         case MOUNT_MAINTENANCE:
1453                                 mount_enter_mounted(mount, true);
1454                                 break;
1455
1456                         case MOUNT_MOUNTING:
1457                                 mount_enter_mounting_done(mount);
1458                                 break;
1459
1460                         default:
1461                                 /* Nothing really changed, but let's
1462                                  * issue an notification call
1463                                  * nonetheless, in case somebody is
1464                                  * waiting for this. (e.g. file system
1465                                  * ro/rw remounts.) */
1466                                 mount_set_state(mount, mount->state);
1467                                 break;
1468                         }
1469                 }
1470
1471                 /* Reset the flags for later calls */
1472                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1473         }
1474 }
1475
1476 int mount_path_is_mounted(Manager *m, const char* path) {
1477         char *t;
1478         int r;
1479
1480         assert(m);
1481         assert(path);
1482
1483         if (path[0] != '/')
1484                 return 1;
1485
1486         if (!(t = strdup(path)))
1487                 return -ENOMEM;
1488
1489         path_kill_slashes(t);
1490
1491         for (;;) {
1492                 char *e, *slash;
1493                 Unit *u;
1494
1495                 if (!(e = unit_name_from_path(t, ".mount"))) {
1496                         r = -ENOMEM;
1497                         goto finish;
1498                 }
1499
1500                 u = manager_get_unit(m, e);
1501                 free(e);
1502
1503                 if (u &&
1504                     (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1505                     MOUNT(u)->state != MOUNT_MOUNTED) {
1506                         r = 0;
1507                         goto finish;
1508                 }
1509
1510                 assert_se(slash = strrchr(t, '/'));
1511
1512                 if (slash == t) {
1513                         r = 1;
1514                         goto finish;
1515                 }
1516
1517                 *slash = 0;
1518         }
1519
1520         r = 1;
1521
1522 finish:
1523         free(t);
1524         return r;
1525 }
1526
1527 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1528         [MOUNT_DEAD] = "dead",
1529         [MOUNT_MOUNTING] = "mounting",
1530         [MOUNT_MOUNTING_DONE] = "mounting-done",
1531         [MOUNT_MOUNTED] = "mounted",
1532         [MOUNT_REMOUNTING] = "remounting",
1533         [MOUNT_UNMOUNTING] = "unmounting",
1534         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1535         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1536         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1537         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1538         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1539         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1540         [MOUNT_MAINTENANCE] = "maintenance"
1541 };
1542
1543 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1544
1545 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1546         [MOUNT_EXEC_MOUNT] = "ExecMount",
1547         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1548         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1549 };
1550
1551 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1552
1553 const UnitVTable mount_vtable = {
1554         .suffix = ".mount",
1555
1556         .no_alias = true,
1557         .no_instances = true,
1558         .no_isolate = true,
1559         .show_status = true,
1560
1561         .init = mount_init,
1562         .load = mount_load,
1563         .done = mount_done,
1564
1565         .coldplug = mount_coldplug,
1566
1567         .dump = mount_dump,
1568
1569         .start = mount_start,
1570         .stop = mount_stop,
1571         .reload = mount_reload,
1572
1573         .serialize = mount_serialize,
1574         .deserialize_item = mount_deserialize_item,
1575
1576         .active_state = mount_active_state,
1577         .sub_state_to_string = mount_sub_state_to_string,
1578
1579         .check_gc = mount_check_gc,
1580
1581         .sigchld_event = mount_sigchld_event,
1582         .timer_event = mount_timer_event,
1583
1584         .bus_message_handler = bus_mount_message_handler,
1585
1586         .enumerate = mount_enumerate,
1587         .shutdown = mount_shutdown
1588 };