src/mount.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <stdio.h>
  24 #include <mntent.h>
  25 #include <sys/epoll.h>
  26 #include <signal.h>
  27
  28 #include "unit.h"
  29 #include "mount.h"
  30 #include "load-fragment.h"
  31 #include "load-dropin.h"
  32 #include "log.h"
  33 #include "strv.h"
  34 #include "mount-setup.h"
  35 #include "unit-name.h"
  36 #include "dbus-mount.h"
  37 #include "special.h"
  38
  39 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
  40         [MOUNT_DEAD] = UNIT_INACTIVE,
  41         [MOUNT_MOUNTING] = UNIT_ACTIVATING,
  42         [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
  43         [MOUNT_MOUNTED] = UNIT_ACTIVE,
  44         [MOUNT_REMOUNTING] = UNIT_RELOADING,
  45         [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
  46         [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  47         [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  48         [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
  49         [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
  50         [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  51         [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  52         [MOUNT_FAILED] = UNIT_FAILED
  53 };
  54
  55 static void mount_init(Unit *u) {
  56         Mount *m = MOUNT(u);
  57
  58         assert(u);
  59         assert(u->meta.load_state == UNIT_STUB);
  60
  61         m->timeout_usec = DEFAULT_TIMEOUT_USEC;
  62         m->directory_mode = 0755;
  63
  64         exec_context_init(&m->exec_context);
  65
  66         /* We need to make sure that /bin/mount is always called in
  67          * the same process group as us, so that the autofs kernel
  68          * side doesn't send us another mount request while we are
  69          * already trying to comply its last one. */
  70         m->exec_context.same_pgrp = true;
  71
  72         m->timer_watch.type = WATCH_INVALID;
  73
  74         m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
  75 }
  76
  77 static void mount_unwatch_control_pid(Mount *m) {
  78         assert(m);
  79
  80         if (m->control_pid <= 0)
  81                 return;
  82
  83         unit_unwatch_pid(UNIT(m), m->control_pid);
  84         m->control_pid = 0;
  85 }
  86
  87 static void mount_parameters_done(MountParameters *p) {
  88         assert(p);
  89
  90         free(p->what);
  91         free(p->options);
  92         free(p->fstype);
  93
  94         p->what = p->options = p->fstype = NULL;
  95 }
  96
  97 static void mount_done(Unit *u) {
  98         Mount *m = MOUNT(u);
  99
 100         assert(m);
 101
 102         free(m->where);
 103         m->where = NULL;
 104
 105         mount_parameters_done(&m->parameters_etc_fstab);
 106         mount_parameters_done(&m->parameters_proc_self_mountinfo);
 107         mount_parameters_done(&m->parameters_fragment);
 108
 109         exec_context_done(&m->exec_context);
 110         exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
 111         m->control_command = NULL;
 112
 113         mount_unwatch_control_pid(m);
 114
 115         unit_unwatch_timer(u, &m->timer_watch);
 116 }
 117
 118 static int mount_add_mount_links(Mount *m) {
 119         Meta *other;
 120         int r;
 121         MountParameters *pm;
 122
 123         assert(m);
 124
 125         if (m->from_fragment)
 126                 pm = &m->parameters_fragment;
 127         else if (m->from_etc_fstab)
 128                 pm = &m->parameters_etc_fstab;
 129         else
 130                 pm = NULL;
 131
 132         /* Adds in links to other mount points that might lie below or
 133          * above us in the hierarchy */
 134
 135         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
 136                 Mount *n = (Mount*) other;
 137                 MountParameters *pn;
 138
 139                 if (n == m)
 140                         continue;
 141
 142                 if (n->meta.load_state != UNIT_LOADED)
 143                         continue;
 144
 145                 if (n->from_fragment)
 146                         pn = &n->parameters_fragment;
 147                 else if (n->from_etc_fstab)
 148                         pn = &n->parameters_etc_fstab;
 149                 else
 150                         pn = NULL;
 151
 152                 if (path_startswith(m->where, n->where)) {
 153
 154                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 155                                 return r;
 156
 157                         if (n->from_etc_fstab || n->from_fragment)
 158                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 159                                         return r;
 160
 161                 } else if (path_startswith(n->where, m->where)) {
 162
 163                         if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
 164                                 return r;
 165
 166                         if (m->from_etc_fstab || m->from_fragment)
 167                                 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 168                                         return r;
 169
 170                 } else if (pm && path_startswith(pm->what, n->where)) {
 171
 172                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 173                                 return r;
 174
 175                         if (m->from_etc_fstab || m->from_fragment)
 176                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 177                                         return r;
 178
 179                 } else if (pn && path_startswith(pn->what, m->where)) {
 180
 181                         if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
 182                                 return r;
 183
 184                         if (n->from_etc_fstab || n->from_fragment)
 185                                 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 186                                         return r;
 187                 }
 188         }
 189
 190         return 0;
 191 }
 192
 193 static int mount_add_swap_links(Mount *m) {
 194         Meta *other;
 195         int r;
 196
 197         assert(m);
 198
 199         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
 200                 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
 201                         return r;
 202
 203         return 0;
 204 }
 205
 206 static int mount_add_path_links(Mount *m) {
 207         Meta *other;
 208         int r;
 209
 210         assert(m);
 211
 212         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
 213                 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
 214                         return r;
 215
 216         return 0;
 217 }
 218
 219 static int mount_add_automount_links(Mount *m) {
 220         Meta *other;
 221         int r;
 222
 223         assert(m);
 224
 225         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
 226                 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
 227                         return r;
 228
 229         return 0;
 230 }
 231
 232 static int mount_add_socket_links(Mount *m) {
 233         Meta *other;
 234         int r;
 235
 236         assert(m);
 237
 238         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
 239                 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
 240                         return r;
 241
 242         return 0;
 243 }
 244
 245 static char* mount_test_option(const char *haystack, const char *needle) {
 246         struct mntent me;
 247
 248         assert(needle);
 249
 250         /* Like glibc's hasmntopt(), but works on a string, not a
 251          * struct mntent */
 252
 253         if (!haystack)
 254                 return false;
 255
 256         zero(me);
 257         me.mnt_opts = (char*) haystack;
 258
 259         return hasmntopt(&me, needle);
 260 }
 261
 262 static int mount_add_target_links(Mount *m) {
 263         const char *target, *after = NULL;
 264         MountParameters *p;
 265         Unit *tu;
 266         int r;
 267         bool noauto, handle, automount, user;
 268
 269         assert(m);
 270
 271         if (m->from_fragment)
 272                 p = &m->parameters_fragment;
 273         else if (m->from_etc_fstab)
 274                 p = &m->parameters_etc_fstab;
 275         else
 276                 return 0;
 277
 278         noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 279         user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users");
 280         handle = !!mount_test_option(p->options, "comment=systemd.mount") ||
 281                 m->meta.manager->mount_auto;
 282         automount = !!mount_test_option(p->options, "comment=systemd.automount");
 283
 284         if (mount_test_option(p->options, "_netdev") ||
 285             (p->fstype && fstype_is_network(p->fstype))) {
 286                 target = SPECIAL_REMOTE_FS_TARGET;
 287
 288                 if (m->meta.manager->running_as == MANAGER_SYSTEM)
 289                         after = SPECIAL_NETWORK_TARGET;
 290         } else
 291                 target = SPECIAL_LOCAL_FS_TARGET;
 292
 293         if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
 294                 return r;
 295
 296         if (after)
 297                 if ((r = unit_add_dependency_by_name(tu, UNIT_AFTER, after, NULL, true)) < 0)
 298                         return r;
 299
 300         if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
 301                 Unit *am;
 302
 303                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
 304                         return r;
 305
 306                 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
 307         } else {
 308
 309                 /* Automatically add mount points that aren't natively
 310                  * configured to local-fs.target */
 311                 if (!noauto &&
 312                     handle &&
 313                     !m->from_fragment)
 314                         if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
 315                                 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
 316                                         return r;
 317
 318                 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
 319         }
 320 }
 321
 322 static bool mount_is_bind(MountParameters *p) {
 323         assert(p);
 324
 325         if (p->fstype && streq(p->fstype, "bind"))
 326                 return true;
 327
 328         if (mount_test_option(p->options, "bind"))
 329                 return true;
 330
 331         return false;
 332 }
 333
 334 static int mount_add_device_links(Mount *m) {
 335         MountParameters *p;
 336         bool nofail, noauto;
 337
 338         assert(m);
 339
 340         if (m->from_fragment)
 341                 p = &m->parameters_fragment;
 342         else if (m->from_etc_fstab)
 343                 p = &m->parameters_etc_fstab;
 344         else
 345                 return 0;
 346
 347         if (!p->what || path_equal(m->where, "/"))
 348                 return 0;
 349
 350         if (mount_is_bind(p))
 351                 return 0;
 352
 353         noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 354         nofail = !!mount_test_option(p->options, "nofail");
 355
 356         return unit_add_node_link(UNIT(m), p->what,
 357                                   !noauto && nofail &&
 358                                   UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM);
 359 }
 360
 361 static int mount_add_default_dependencies(Mount *m) {
 362         int r;
 363
 364         assert(m);
 365
 366         if (m->meta.manager->running_as == MANAGER_SYSTEM &&
 367             !path_equal(m->where, "/")) {
 368
 369                 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_FSCK_TARGET, NULL, true)) < 0)
 370                         return r;
 371
 372                 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
 373                         return r;
 374         }
 375
 376         return 0;
 377 }
 378
 379 static int mount_verify(Mount *m) {
 380         bool b;
 381         char *e;
 382         assert(m);
 383
 384         if (m->meta.load_state != UNIT_LOADED)
 385                 return 0;
 386
 387         if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
 388                 return -ENOENT;
 389
 390         if (!(e = unit_name_from_path(m->where, ".mount")))
 391                 return -ENOMEM;
 392
 393         b = unit_has_name(UNIT(m), e);
 394         free(e);
 395
 396         if (!b) {
 397                 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
 398                 return -EINVAL;
 399         }
 400
 401         if (m->meta.fragment_path && !m->parameters_fragment.what) {
 402                 log_error("%s's What setting is missing. Refusing.", m->meta.id);
 403                 return -EBADMSG;
 404         }
 405
 406         if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 407                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
 408                 return -EINVAL;
 409         }
 410
 411         return 0;
 412 }
 413
 414 static int mount_load(Unit *u) {
 415         Mount *m = MOUNT(u);
 416         int r;
 417
 418         assert(u);
 419         assert(u->meta.load_state == UNIT_STUB);
 420
 421         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
 422                 return r;
 423
 424         /* This is a new unit? Then let's add in some extras */
 425         if (u->meta.load_state == UNIT_LOADED) {
 426                 if (m->meta.fragment_path)
 427                         m->from_fragment = true;
 428
 429                 if (!m->where)
 430                         if (!(m->where = unit_name_to_path(u->meta.id)))
 431                                 return -ENOMEM;
 432
 433                 path_kill_slashes(m->where);
 434
 435                 if (!m->meta.description)
 436                         if ((r = unit_set_description(u, m->where)) < 0)
 437                                 return r;
 438
 439                 if ((r = mount_add_device_links(m)) < 0)
 440                         return r;
 441
 442                 if ((r = mount_add_mount_links(m)) < 0)
 443                         return r;
 444
 445                 if ((r = mount_add_socket_links(m)) < 0)
 446                         return r;
 447
 448                 if ((r = mount_add_swap_links(m)) < 0)
 449                         return r;
 450
 451                 if ((r = mount_add_path_links(m)) < 0)
 452                         return r;
 453
 454                 if ((r = mount_add_automount_links(m)) < 0)
 455                         return r;
 456
 457                 if ((r = mount_add_target_links(m)) < 0)
 458                         return r;
 459
 460                 if ((r = unit_add_default_cgroup(u)) < 0)
 461                         return r;
 462
 463                 if (m->meta.default_dependencies)
 464                         if ((r = mount_add_default_dependencies(m)) < 0)
 465                                 return r;
 466         }
 467
 468         return mount_verify(m);
 469 }
 470
 471 static int mount_notify_automount(Mount *m, int status) {
 472         Unit *p;
 473         int r;
 474
 475         assert(m);
 476
 477         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
 478                 return r == -ENOENT ? 0 : r;
 479
 480         return automount_send_ready(AUTOMOUNT(p), status);
 481 }
 482
 483 static void mount_set_state(Mount *m, MountState state) {
 484         MountState old_state;
 485         assert(m);
 486
 487         old_state = m->state;
 488         m->state = state;
 489
 490         if (state != MOUNT_MOUNTING &&
 491             state != MOUNT_MOUNTING_DONE &&
 492             state != MOUNT_REMOUNTING &&
 493             state != MOUNT_UNMOUNTING &&
 494             state != MOUNT_MOUNTING_SIGTERM &&
 495             state != MOUNT_MOUNTING_SIGKILL &&
 496             state != MOUNT_UNMOUNTING_SIGTERM &&
 497             state != MOUNT_UNMOUNTING_SIGKILL &&
 498             state != MOUNT_REMOUNTING_SIGTERM &&
 499             state != MOUNT_REMOUNTING_SIGKILL) {
 500                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
 501                 mount_unwatch_control_pid(m);
 502                 m->control_command = NULL;
 503                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 504         }
 505
 506         if (state == MOUNT_MOUNTED ||
 507             state == MOUNT_REMOUNTING)
 508                 mount_notify_automount(m, 0);
 509         else if (state == MOUNT_DEAD ||
 510                  state == MOUNT_UNMOUNTING ||
 511                  state == MOUNT_MOUNTING_SIGTERM ||
 512                  state == MOUNT_MOUNTING_SIGKILL ||
 513                  state == MOUNT_REMOUNTING_SIGTERM ||
 514                  state == MOUNT_REMOUNTING_SIGKILL ||
 515                  state == MOUNT_UNMOUNTING_SIGTERM ||
 516                  state == MOUNT_UNMOUNTING_SIGKILL ||
 517                  state == MOUNT_FAILED)
 518                 mount_notify_automount(m, -ENODEV);
 519
 520         if (state != old_state)
 521                 log_debug("%s changed %s -> %s",
 522                           m->meta.id,
 523                           mount_state_to_string(old_state),
 524                           mount_state_to_string(state));
 525
 526         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
 527 }
 528
 529 static int mount_coldplug(Unit *u) {
 530         Mount *m = MOUNT(u);
 531         MountState new_state = MOUNT_DEAD;
 532         int r;
 533
 534         assert(m);
 535         assert(m->state == MOUNT_DEAD);
 536
 537         if (m->deserialized_state != m->state)
 538                 new_state = m->deserialized_state;
 539         else if (m->from_proc_self_mountinfo)
 540                 new_state = MOUNT_MOUNTED;
 541
 542         if (new_state != m->state) {
 543
 544                 if (new_state == MOUNT_MOUNTING ||
 545                     new_state == MOUNT_MOUNTING_DONE ||
 546                     new_state == MOUNT_REMOUNTING ||
 547                     new_state == MOUNT_UNMOUNTING ||
 548                     new_state == MOUNT_MOUNTING_SIGTERM ||
 549                     new_state == MOUNT_MOUNTING_SIGKILL ||
 550                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
 551                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
 552                     new_state == MOUNT_REMOUNTING_SIGTERM ||
 553                     new_state == MOUNT_REMOUNTING_SIGKILL) {
 554
 555                         if (m->control_pid <= 0)
 556                                 return -EBADMSG;
 557
 558                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
 559                                 return r;
 560
 561                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 562                                 return r;
 563                 }
 564
 565                 mount_set_state(m, new_state);
 566         }
 567
 568         return 0;
 569 }
 570
 571 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
 572         Mount *m = MOUNT(u);
 573         MountParameters *p;
 574
 575         assert(m);
 576         assert(f);
 577
 578         if (m->from_proc_self_mountinfo)
 579                 p = &m->parameters_proc_self_mountinfo;
 580         else if (m->from_fragment)
 581                 p = &m->parameters_fragment;
 582         else
 583                 p = &m->parameters_etc_fstab;
 584
 585         fprintf(f,
 586                 "%sMount State: %s\n"
 587                 "%sWhere: %s\n"
 588                 "%sWhat: %s\n"
 589                 "%sFile System Type: %s\n"
 590                 "%sOptions: %s\n"
 591                 "%sFrom /etc/fstab: %s\n"
 592                 "%sFrom /proc/self/mountinfo: %s\n"
 593                 "%sFrom fragment: %s\n"
 594                 "%sDirectoryMode: %04o\n",
 595                 prefix, mount_state_to_string(m->state),
 596                 prefix, m->where,
 597                 prefix, strna(p->what),
 598                 prefix, strna(p->fstype),
 599                 prefix, strna(p->options),
 600                 prefix, yes_no(m->from_etc_fstab),
 601                 prefix, yes_no(m->from_proc_self_mountinfo),
 602                 prefix, yes_no(m->from_fragment),
 603                 prefix, m->directory_mode);
 604
 605         if (m->control_pid > 0)
 606                 fprintf(f,
 607                         "%sControl PID: %lu\n",
 608                         prefix, (unsigned long) m->control_pid);
 609
 610         exec_context_dump(&m->exec_context, f, prefix);
 611 }
 612
 613 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 614         pid_t pid;
 615         int r;
 616
 617         assert(m);
 618         assert(c);
 619         assert(_pid);
 620
 621         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 622                 goto fail;
 623
 624         if ((r = exec_spawn(c,
 625                             NULL,
 626                             &m->exec_context,
 627                             NULL, 0,
 628                             m->meta.manager->environment,
 629                             true,
 630                             true,
 631                             true,
 632                             m->meta.manager->confirm_spawn,
 633                             m->meta.cgroup_bondings,
 634                             &pid)) < 0)
 635                 goto fail;
 636
 637         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 638                 /* FIXME: we need to do something here */
 639                 goto fail;
 640
 641         *_pid = pid;
 642
 643         return 0;
 644
 645 fail:
 646         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 647
 648         return r;
 649 }
 650
 651 static void mount_enter_dead(Mount *m, bool success) {
 652         assert(m);
 653
 654         if (!success)
 655                 m->failure = true;
 656
 657         mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
 658 }
 659
 660 static void mount_enter_mounted(Mount *m, bool success) {
 661         assert(m);
 662
 663         if (!success)
 664                 m->failure = true;
 665
 666         mount_set_state(m, MOUNT_MOUNTED);
 667 }
 668
 669 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 670         int r;
 671         Set *pid_set = NULL;
 672         bool wait_for_exit = false;
 673
 674         assert(m);
 675
 676         if (!success)
 677                 m->failure = true;
 678
 679         if (m->exec_context.kill_mode != KILL_NONE) {
 680                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 681                            state == MOUNT_UNMOUNTING_SIGTERM ||
 682                            state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
 683
 684                 if (m->control_pid > 0) {
 685                         if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
 686                                  -m->control_pid :
 687                                  m->control_pid, sig) < 0 && errno != ESRCH)
 688
 689                                 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
 690                         else
 691                                 wait_for_exit = true;
 692                 }
 693
 694                 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
 695
 696                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
 697                                 r = -ENOMEM;
 698                                 goto fail;
 699                         }
 700
 701                         /* Exclude the control pid from being killed via the cgroup */
 702                         if (m->control_pid > 0)
 703                                 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
 704                                         goto fail;
 705
 706                         if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
 707                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
 708                                         log_warning("Failed to kill control group: %s", strerror(-r));
 709                         } else if (r > 0)
 710                                 wait_for_exit = true;
 711
 712                         set_free(pid_set);
 713                 }
 714         }
 715
 716         if (wait_for_exit) {
 717                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 718                         goto fail;
 719
 720                 mount_set_state(m, state);
 721         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 722                 mount_enter_mounted(m, true);
 723         else
 724                 mount_enter_dead(m, true);
 725
 726         return;
 727
 728 fail:
 729         log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
 730
 731         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 732                 mount_enter_mounted(m, false);
 733         else
 734                 mount_enter_dead(m, false);
 735
 736         if (pid_set)
 737                 set_free(pid_set);
 738 }
 739
 740 static void mount_enter_unmounting(Mount *m, bool success) {
 741         int r;
 742
 743         assert(m);
 744
 745         if (!success)
 746                 m->failure = true;
 747
 748         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 749         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 750
 751         if ((r = exec_command_set(
 752                              m->control_command,
 753                              "/bin/umount",
 754                              m->where,
 755                              NULL)) < 0)
 756                 goto fail;
 757
 758         mount_unwatch_control_pid(m);
 759
 760         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 761                 goto fail;
 762
 763         mount_set_state(m, MOUNT_UNMOUNTING);
 764
 765         return;
 766
 767 fail:
 768         log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
 769         mount_enter_mounted(m, false);
 770 }
 771
 772 static void mount_enter_mounting(Mount *m) {
 773         int r;
 774
 775         assert(m);
 776
 777         m->control_command_id = MOUNT_EXEC_MOUNT;
 778         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 779
 780         mkdir_p(m->where, m->directory_mode);
 781
 782         if (m->from_fragment)
 783                 r = exec_command_set(
 784                                 m->control_command,
 785                                 "/bin/mount",
 786                                 m->parameters_fragment.what,
 787                                 m->where,
 788                                 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
 789                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 790                                 NULL);
 791         else if (m->from_etc_fstab)
 792                 r = exec_command_set(
 793                                 m->control_command,
 794                                 "/bin/mount",
 795                                 m->where,
 796                                 NULL);
 797         else
 798                 r = -ENOENT;
 799
 800         if (r < 0)
 801                 goto fail;
 802
 803         mount_unwatch_control_pid(m);
 804
 805         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 806                 goto fail;
 807
 808         mount_set_state(m, MOUNT_MOUNTING);
 809
 810         return;
 811
 812 fail:
 813         log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
 814         mount_enter_dead(m, false);
 815 }
 816
 817 static void mount_enter_mounting_done(Mount *m) {
 818         assert(m);
 819
 820         mount_set_state(m, MOUNT_MOUNTING_DONE);
 821 }
 822
 823 static void mount_enter_remounting(Mount *m, bool success) {
 824         int r;
 825
 826         assert(m);
 827
 828         if (!success)
 829                 m->failure = true;
 830
 831         m->control_command_id = MOUNT_EXEC_REMOUNT;
 832         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 833
 834         if (m->from_fragment) {
 835                 char *buf = NULL;
 836                 const char *o;
 837
 838                 if (m->parameters_fragment.options) {
 839                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 840                                 r = -ENOMEM;
 841                                 goto fail;
 842                         }
 843
 844                         o = buf;
 845                 } else
 846                         o = "remount";
 847
 848                 r = exec_command_set(
 849                                 m->control_command,
 850                                 "/bin/mount",
 851                                 m->parameters_fragment.what,
 852                                 m->where,
 853                                 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
 854                                 "-o", o,
 855                                 NULL);
 856
 857                 free(buf);
 858         } else if (m->from_etc_fstab)
 859                 r = exec_command_set(
 860                                 m->control_command,
 861                                 "/bin/mount",
 862                                 m->where,
 863                                 "-o", "remount",
 864                                 NULL);
 865         else
 866                 r = -ENOENT;
 867
 868         if (r < 0)
 869                 goto fail;
 870
 871         mount_unwatch_control_pid(m);
 872
 873         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 874                 goto fail;
 875
 876         mount_set_state(m, MOUNT_REMOUNTING);
 877
 878         return;
 879
 880 fail:
 881         log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
 882         mount_enter_mounted(m, false);
 883 }
 884
 885 static int mount_start(Unit *u) {
 886         Mount *m = MOUNT(u);
 887
 888         assert(m);
 889
 890         /* We cannot fulfill this request right now, try again later
 891          * please! */
 892         if (m->state == MOUNT_UNMOUNTING ||
 893             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 894             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 895             m->state == MOUNT_MOUNTING_SIGTERM ||
 896             m->state == MOUNT_MOUNTING_SIGKILL)
 897                 return -EAGAIN;
 898
 899         /* Already on it! */
 900         if (m->state == MOUNT_MOUNTING)
 901                 return 0;
 902
 903         assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
 904
 905         m->failure = false;
 906         mount_enter_mounting(m);
 907         return 0;
 908 }
 909
 910 static int mount_stop(Unit *u) {
 911         Mount *m = MOUNT(u);
 912
 913         assert(m);
 914
 915         /* Already on it */
 916         if (m->state == MOUNT_UNMOUNTING ||
 917             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 918             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 919             m->state == MOUNT_MOUNTING_SIGTERM ||
 920             m->state == MOUNT_MOUNTING_SIGKILL)
 921                 return 0;
 922
 923         assert(m->state == MOUNT_MOUNTING ||
 924                m->state == MOUNT_MOUNTING_DONE ||
 925                m->state == MOUNT_MOUNTED ||
 926                m->state == MOUNT_REMOUNTING ||
 927                m->state == MOUNT_REMOUNTING_SIGTERM ||
 928                m->state == MOUNT_REMOUNTING_SIGKILL);
 929
 930         mount_enter_unmounting(m, true);
 931         return 0;
 932 }
 933
 934 static int mount_reload(Unit *u) {
 935         Mount *m = MOUNT(u);
 936
 937         assert(m);
 938
 939         if (m->state == MOUNT_MOUNTING_DONE)
 940                 return -EAGAIN;
 941
 942         assert(m->state == MOUNT_MOUNTED);
 943
 944         mount_enter_remounting(m, true);
 945         return 0;
 946 }
 947
 948 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
 949         Mount *m = MOUNT(u);
 950
 951         assert(m);
 952         assert(f);
 953         assert(fds);
 954
 955         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
 956         unit_serialize_item(u, f, "failure", yes_no(m->failure));
 957
 958         if (m->control_pid > 0)
 959                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
 960
 961         if (m->control_command_id >= 0)
 962                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
 963
 964         return 0;
 965 }
 966
 967 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
 968         Mount *m = MOUNT(u);
 969
 970         assert(u);
 971         assert(key);
 972         assert(value);
 973         assert(fds);
 974
 975         if (streq(key, "state")) {
 976                 MountState state;
 977
 978                 if ((state = mount_state_from_string(value)) < 0)
 979                         log_debug("Failed to parse state value %s", value);
 980                 else
 981                         m->deserialized_state = state;
 982         } else if (streq(key, "failure")) {
 983                 int b;
 984
 985                 if ((b = parse_boolean(value)) < 0)
 986                         log_debug("Failed to parse failure value %s", value);
 987                 else
 988                         m->failure = b || m->failure;
 989
 990         } else if (streq(key, "control-pid")) {
 991                 pid_t pid;
 992
 993                 if (parse_pid(value, &pid) < 0)
 994                         log_debug("Failed to parse control-pid value %s", value);
 995                 else
 996                         m->control_pid = pid;
 997         } else if (streq(key, "control-command")) {
 998                 MountExecCommand id;
 999
1000                 if ((id = mount_exec_command_from_string(value)) < 0)
1001                         log_debug("Failed to parse exec-command value %s", value);
1002                 else {
1003                         m->control_command_id = id;
1004                         m->control_command = m->exec_command + id;
1005                 }
1006
1007         } else
1008                 log_debug("Unknown serialization key '%s'", key);
1009
1010         return 0;
1011 }
1012
1013 static UnitActiveState mount_active_state(Unit *u) {
1014         assert(u);
1015
1016         return state_translation_table[MOUNT(u)->state];
1017 }
1018
1019 static const char *mount_sub_state_to_string(Unit *u) {
1020         assert(u);
1021
1022         return mount_state_to_string(MOUNT(u)->state);
1023 }
1024
1025 static bool mount_check_gc(Unit *u) {
1026         Mount *m = MOUNT(u);
1027
1028         assert(m);
1029
1030         return m->from_etc_fstab || m->from_proc_self_mountinfo;
1031 }
1032
1033 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1034         Mount *m = MOUNT(u);
1035         bool success;
1036
1037         assert(m);
1038         assert(pid >= 0);
1039
1040         if (pid != m->control_pid)
1041                 return;
1042
1043         m->control_pid = 0;
1044
1045         success = is_clean_exit(code, status);
1046         m->failure = m->failure || !success;
1047
1048         if (m->control_command) {
1049                 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1050                 m->control_command = NULL;
1051                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1052         }
1053
1054         log_full(success ? LOG_DEBUG : LOG_NOTICE,
1055                  "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1056
1057         /* Note that mount(8) returning and the kernel sending us a
1058          * mount table change event might happen out-of-order. If an
1059          * operation succeed we assume the kernel will follow soon too
1060          * and already change into the resulting state.  If it fails
1061          * we check if the kernel still knows about the mount. and
1062          * change state accordingly. */
1063
1064         switch (m->state) {
1065
1066         case MOUNT_MOUNTING:
1067         case MOUNT_MOUNTING_DONE:
1068         case MOUNT_MOUNTING_SIGKILL:
1069         case MOUNT_MOUNTING_SIGTERM:
1070         case MOUNT_REMOUNTING:
1071         case MOUNT_REMOUNTING_SIGKILL:
1072         case MOUNT_REMOUNTING_SIGTERM:
1073
1074                 if (success)
1075                         mount_enter_mounted(m, true);
1076                 else if (m->from_proc_self_mountinfo)
1077                         mount_enter_mounted(m, false);
1078                 else
1079                         mount_enter_dead(m, false);
1080                 break;
1081
1082         case MOUNT_UNMOUNTING:
1083         case MOUNT_UNMOUNTING_SIGKILL:
1084         case MOUNT_UNMOUNTING_SIGTERM:
1085
1086                 if (success)
1087                         mount_enter_dead(m, true);
1088                 else if (m->from_proc_self_mountinfo)
1089                         mount_enter_mounted(m, false);
1090                 else
1091                         mount_enter_dead(m, false);
1092                 break;
1093
1094         default:
1095                 assert_not_reached("Uh, control process died at wrong time.");
1096         }
1097
1098         /* Notify clients about changed exit status */
1099         unit_add_to_dbus_queue(u);
1100 }
1101
1102 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1103         Mount *m = MOUNT(u);
1104
1105         assert(m);
1106         assert(elapsed == 1);
1107         assert(w == &m->timer_watch);
1108
1109         switch (m->state) {
1110
1111         case MOUNT_MOUNTING:
1112         case MOUNT_MOUNTING_DONE:
1113                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1114                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1115                 break;
1116
1117         case MOUNT_REMOUNTING:
1118                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1119                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1120                 break;
1121
1122         case MOUNT_UNMOUNTING:
1123                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1124                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1125                 break;
1126
1127         case MOUNT_MOUNTING_SIGTERM:
1128                 log_warning("%s mounting timed out. Killing.", u->meta.id);
1129                 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1130                 break;
1131
1132         case MOUNT_REMOUNTING_SIGTERM:
1133                 log_warning("%s remounting timed out. Killing.", u->meta.id);
1134                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1135                 break;
1136
1137         case MOUNT_UNMOUNTING_SIGTERM:
1138                 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1139                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1140                 break;
1141
1142         case MOUNT_MOUNTING_SIGKILL:
1143         case MOUNT_REMOUNTING_SIGKILL:
1144         case MOUNT_UNMOUNTING_SIGKILL:
1145                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1146
1147                 if (m->from_proc_self_mountinfo)
1148                         mount_enter_mounted(m, false);
1149                 else
1150                         mount_enter_dead(m, false);
1151                 break;
1152
1153         default:
1154                 assert_not_reached("Timeout at wrong time.");
1155         }
1156 }
1157
1158 static int mount_add_one(
1159                 Manager *m,
1160                 const char *what,
1161                 const char *where,
1162                 const char *options,
1163                 const char *fstype,
1164                 bool from_proc_self_mountinfo,
1165                 bool set_flags) {
1166         int r;
1167         Unit *u;
1168         bool delete;
1169         char *e, *w = NULL, *o = NULL, *f = NULL;
1170         MountParameters *p;
1171
1172         assert(m);
1173         assert(what);
1174         assert(where);
1175         assert(options);
1176         assert(fstype);
1177
1178         assert(!set_flags || from_proc_self_mountinfo);
1179
1180         /* Ignore API mount points. They should never be referenced in
1181          * dependencies ever. */
1182         if (mount_point_is_api(where))
1183                 return 0;
1184
1185         if (streq(fstype, "autofs"))
1186                 return 0;
1187
1188         /* probably some kind of swap, ignore */
1189         if (!is_path(where))
1190                 return 0;
1191
1192         if (!(e = unit_name_from_path(where, ".mount")))
1193                 return -ENOMEM;
1194
1195         if (!(u = manager_get_unit(m, e))) {
1196                 delete = true;
1197
1198                 if (!(u = unit_new(m))) {
1199                         free(e);
1200                         return -ENOMEM;
1201                 }
1202
1203                 r = unit_add_name(u, e);
1204                 free(e);
1205
1206                 if (r < 0)
1207                         goto fail;
1208
1209                 if (!(MOUNT(u)->where = strdup(where))) {
1210                         r = -ENOMEM;
1211                         goto fail;
1212                 }
1213
1214                 unit_add_to_load_queue(u);
1215         } else {
1216                 delete = false;
1217                 free(e);
1218         }
1219
1220         if (!(w = strdup(what)) ||
1221             !(o = strdup(options)) ||
1222             !(f = strdup(fstype))) {
1223                 r = -ENOMEM;
1224                 goto fail;
1225         }
1226
1227         if (from_proc_self_mountinfo) {
1228                 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1229
1230                 if (set_flags) {
1231                         MOUNT(u)->is_mounted = true;
1232                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1233                         MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1234                 }
1235
1236                 MOUNT(u)->from_proc_self_mountinfo = true;
1237         } else {
1238                 p = &MOUNT(u)->parameters_etc_fstab;
1239                 MOUNT(u)->from_etc_fstab = true;
1240         }
1241
1242         free(p->what);
1243         p->what = w;
1244
1245         free(p->options);
1246         p->options = o;
1247
1248         free(p->fstype);
1249         p->fstype = f;
1250
1251         unit_add_to_dbus_queue(u);
1252
1253         return 0;
1254
1255 fail:
1256         free(w);
1257         free(o);
1258         free(f);
1259
1260         if (delete && u)
1261                 unit_free(u);
1262
1263         return r;
1264 }
1265
1266 static char *fstab_node_to_udev_node(char *p) {
1267         char *dn, *t, *u;
1268         int r;
1269
1270         /* FIXME: to follow udev's logic 100% we need to leave valid
1271          * UTF8 chars unescaped */
1272
1273         if (startswith(p, "LABEL=")) {
1274
1275                 if (!(u = unquote(p+6, "\"\'")))
1276                         return NULL;
1277
1278                 t = xescape(u, "/ ");
1279                 free(u);
1280
1281                 if (!t)
1282                         return NULL;
1283
1284                 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1285                 free(t);
1286
1287                 if (r < 0)
1288                         return NULL;
1289
1290                 return dn;
1291         }
1292
1293         if (startswith(p, "UUID=")) {
1294
1295                 if (!(u = unquote(p+5, "\"\'")))
1296                         return NULL;
1297
1298                 t = xescape(u, "/ ");
1299                 free(u);
1300
1301                 if (!t)
1302                         return NULL;
1303
1304                 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1305                 free(t);
1306
1307                 if (r < 0)
1308                         return NULL;
1309
1310                 return dn;
1311         }
1312
1313         return strdup(p);
1314 }
1315
1316 static int mount_find_pri(char *options) {
1317         char *end, *pri;
1318         unsigned long r;
1319
1320         if (!(pri = mount_test_option(options, "pri=")))
1321                 return 0;
1322
1323         pri += 4;
1324
1325         errno = 0;
1326         r = strtoul(pri, &end, 10);
1327
1328         if (errno != 0)
1329                 return -errno;
1330
1331         if (end == pri || (*end != ',' && *end != 0))
1332                 return -EINVAL;
1333
1334         return (int) r;
1335 }
1336
1337 static int mount_load_etc_fstab(Manager *m) {
1338         FILE *f;
1339         int r = 0;
1340         struct mntent* me;
1341
1342         assert(m);
1343
1344         errno = 0;
1345         if (!(f = setmntent("/etc/fstab", "r")))
1346                 return -errno;
1347
1348         while ((me = getmntent(f))) {
1349                 char *where, *what;
1350                 int k;
1351
1352                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1353                         r = -ENOMEM;
1354                         goto finish;
1355                 }
1356
1357                 if (!(where = strdup(me->mnt_dir))) {
1358                         free(what);
1359                         r = -ENOMEM;
1360                         goto finish;
1361                 }
1362
1363                 if (what[0] == '/')
1364                         path_kill_slashes(what);
1365
1366                 if (where[0] == '/')
1367                         path_kill_slashes(where);
1368
1369                 if (streq(me->mnt_type, "swap")) {
1370                         int pri;
1371
1372                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1373                                 k = pri;
1374                         else
1375                                 k = swap_add_one(m,
1376                                                  what,
1377                                                  NULL,
1378                                                  pri,
1379                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1380                                                  !!mount_test_option(me->mnt_opts, "nofail"),
1381                                                  !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1382                                                  false);
1383                 } else
1384                         k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1385
1386                 free(what);
1387                 free(where);
1388
1389                 if (r < 0)
1390                         r = k;
1391         }
1392
1393 finish:
1394
1395         endmntent(f);
1396         return r;
1397 }
1398
1399 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1400         int r = 0;
1401         unsigned i;
1402         char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1403
1404         assert(m);
1405
1406         rewind(m->proc_self_mountinfo);
1407
1408         for (i = 1;; i++) {
1409                 int k;
1410
1411                 device = path = options = options2 = fstype = d = p = o = NULL;
1412
1413                 if ((k = fscanf(m->proc_self_mountinfo,
1414                                 "%*s "       /* (1) mount id */
1415                                 "%*s "       /* (2) parent id */
1416                                 "%*s "       /* (3) major:minor */
1417                                 "%*s "       /* (4) root */
1418                                 "%ms "       /* (5) mount point */
1419                                 "%ms"        /* (6) mount options */
1420                                 "%*[^-]"     /* (7) optional fields */
1421                                 "- "         /* (8) separator */
1422                                 "%ms "       /* (9) file system type */
1423                                 "%ms"        /* (10) mount source */
1424                                 "%ms"        /* (11) mount options 2 */
1425                                 "%*[^\n]",   /* some rubbish at the end */
1426                                 &path,
1427                                 &options,
1428                                 &fstype,
1429                                 &device,
1430                                 &options2)) != 5) {
1431
1432                         if (k == EOF)
1433                                 break;
1434
1435                         log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1436                         goto clean_up;
1437                 }
1438
1439                 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1440                         r = -ENOMEM;
1441                         goto finish;
1442                 }
1443
1444                 if (!(d = cunescape(device)) ||
1445                     !(p = cunescape(path))) {
1446                         r = -ENOMEM;
1447                         goto finish;
1448                 }
1449
1450                 if ((k = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1451                         r = k;
1452
1453 clean_up:
1454                 free(device);
1455                 free(path);
1456                 free(options);
1457                 free(options2);
1458                 free(fstype);
1459                 free(d);
1460                 free(p);
1461                 free(o);
1462         }
1463
1464 finish:
1465         free(device);
1466         free(path);
1467         free(options);
1468         free(options2);
1469         free(fstype);
1470         free(d);
1471         free(p);
1472         free(o);
1473
1474         return r;
1475 }
1476
1477 static void mount_shutdown(Manager *m) {
1478         assert(m);
1479
1480         if (m->proc_self_mountinfo) {
1481                 fclose(m->proc_self_mountinfo);
1482                 m->proc_self_mountinfo = NULL;
1483         }
1484 }
1485
1486 static int mount_enumerate(Manager *m) {
1487         int r;
1488         struct epoll_event ev;
1489         assert(m);
1490
1491         if (!m->proc_self_mountinfo) {
1492                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1493                         return -errno;
1494
1495                 m->mount_watch.type = WATCH_MOUNT;
1496                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1497
1498                 zero(ev);
1499                 ev.events = EPOLLERR;
1500                 ev.data.ptr = &m->mount_watch;
1501
1502                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1503                         return -errno;
1504         }
1505
1506         if ((r = mount_load_etc_fstab(m)) < 0)
1507                 goto fail;
1508
1509         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1510                 goto fail;
1511
1512         return 0;
1513
1514 fail:
1515         mount_shutdown(m);
1516         return r;
1517 }
1518
1519 void mount_fd_event(Manager *m, int events) {
1520         Meta *meta;
1521         int r;
1522
1523         assert(m);
1524         assert(events == EPOLLERR);
1525
1526         /* The manager calls this for every fd event happening on the
1527          * /proc/self/mountinfo file, which informs us about mounting
1528          * table changes */
1529
1530         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1531                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1532
1533                 /* Reset flags, just in case, for later calls */
1534                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1535                         Mount *mount = (Mount*) meta;
1536
1537                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1538                 }
1539
1540                 return;
1541         }
1542
1543         manager_dispatch_load_queue(m);
1544
1545         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1546                 Mount *mount = (Mount*) meta;
1547
1548                 if (!mount->is_mounted) {
1549                         /* This has just been unmounted. */
1550
1551                         mount->from_proc_self_mountinfo = false;
1552
1553                         switch (mount->state) {
1554
1555                         case MOUNT_MOUNTED:
1556                                 mount_enter_dead(mount, true);
1557                                 break;
1558
1559                         default:
1560                                 mount_set_state(mount, mount->state);
1561                                 break;
1562
1563                         }
1564
1565                 } else if (mount->just_mounted || mount->just_changed) {
1566
1567                         /* New or changed mount entry */
1568
1569                         switch (mount->state) {
1570
1571                         case MOUNT_DEAD:
1572                         case MOUNT_FAILED:
1573                                 mount_enter_mounted(mount, true);
1574                                 break;
1575
1576                         case MOUNT_MOUNTING:
1577                                 mount_enter_mounting_done(mount);
1578                                 break;
1579
1580                         default:
1581                                 /* Nothing really changed, but let's
1582                                  * issue an notification call
1583                                  * nonetheless, in case somebody is
1584                                  * waiting for this. (e.g. file system
1585                                  * ro/rw remounts.) */
1586                                 mount_set_state(mount, mount->state);
1587                                 break;
1588                         }
1589                 }
1590
1591                 /* Reset the flags for later calls */
1592                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1593         }
1594 }
1595
1596 static void mount_reset_failed(Unit *u) {
1597         Mount *m = MOUNT(u);
1598
1599         assert(m);
1600
1601         if (m->state == MOUNT_FAILED)
1602                 mount_set_state(m, MOUNT_DEAD);
1603
1604         m->failure = false;
1605 }
1606
1607 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1608         [MOUNT_DEAD] = "dead",
1609         [MOUNT_MOUNTING] = "mounting",
1610         [MOUNT_MOUNTING_DONE] = "mounting-done",
1611         [MOUNT_MOUNTED] = "mounted",
1612         [MOUNT_REMOUNTING] = "remounting",
1613         [MOUNT_UNMOUNTING] = "unmounting",
1614         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1615         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1616         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1617         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1618         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1619         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1620         [MOUNT_FAILED] = "failed"
1621 };
1622
1623 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1624
1625 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1626         [MOUNT_EXEC_MOUNT] = "ExecMount",
1627         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1628         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1629 };
1630
1631 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1632
1633 const UnitVTable mount_vtable = {
1634         .suffix = ".mount",
1635
1636         .no_alias = true,
1637         .no_instances = true,
1638         .no_isolate = true,
1639         .show_status = true,
1640
1641         .init = mount_init,
1642         .load = mount_load,
1643         .done = mount_done,
1644
1645         .coldplug = mount_coldplug,
1646
1647         .dump = mount_dump,
1648
1649         .start = mount_start,
1650         .stop = mount_stop,
1651         .reload = mount_reload,
1652
1653         .serialize = mount_serialize,
1654         .deserialize_item = mount_deserialize_item,
1655
1656         .active_state = mount_active_state,
1657         .sub_state_to_string = mount_sub_state_to_string,
1658
1659         .check_gc = mount_check_gc,
1660
1661         .sigchld_event = mount_sigchld_event,
1662         .timer_event = mount_timer_event,
1663
1664         .reset_failed = mount_reset_failed,
1665
1666         .bus_interface = "org.freedesktop.systemd1.Mount",
1667         .bus_message_handler = bus_mount_message_handler,
1668         .bus_invalidating_properties =  bus_mount_invalidating_properties,
1669
1670         .enumerate = mount_enumerate,
1671         .shutdown = mount_shutdown
1672 };