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;
 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             fstype_is_network(p->fstype))
 286                 target = SPECIAL_REMOTE_FS_TARGET;
 287         else
 288                 target = SPECIAL_LOCAL_FS_TARGET;
 289
 290         if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
 291                 return r;
 292
 293         if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
 294                 Unit *am;
 295
 296                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
 297                         return r;
 298
 299                 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
 300         } else {
 301
 302                 /* Automatically add mount points that aren't natively
 303                  * configured to local-fs.target */
 304                 if (!noauto &&
 305                     handle &&
 306                     !m->from_fragment)
 307                         if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
 308                                 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
 309                                         return r;
 310
 311                 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
 312         }
 313 }
 314
 315 static bool mount_is_bind(MountParameters *p) {
 316         assert(p);
 317
 318         if (p->fstype && streq(p->fstype, "bind"))
 319                 return true;
 320
 321         if (mount_test_option(p->options, "bind"))
 322                 return true;
 323
 324         return false;
 325 }
 326
 327 static int mount_add_device_links(Mount *m) {
 328         MountParameters *p;
 329         bool nofail, noauto;
 330
 331         assert(m);
 332
 333         if (m->from_fragment)
 334                 p = &m->parameters_fragment;
 335         else if (m->from_etc_fstab)
 336                 p = &m->parameters_etc_fstab;
 337         else
 338                 return 0;
 339
 340         if (!p->what || path_equal(m->where, "/"))
 341                 return 0;
 342
 343         if (mount_is_bind(p))
 344                 return 0;
 345
 346         noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 347         nofail = !!mount_test_option(p->options, "nofail");
 348
 349         return unit_add_node_link(UNIT(m), p->what,
 350                                   !noauto && nofail &&
 351                                   UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM);
 352 }
 353
 354 static int mount_add_default_dependencies(Mount *m) {
 355         int r;
 356
 357         assert(m);
 358
 359         if (m->meta.manager->running_as == MANAGER_SYSTEM &&
 360             !path_equal(m->where, "/")) {
 361
 362                 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_FSCK_TARGET, NULL, true)) < 0)
 363                         return r;
 364
 365                 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
 366                         return r;
 367         }
 368
 369         return 0;
 370 }
 371
 372 static int mount_verify(Mount *m) {
 373         bool b;
 374         char *e;
 375         assert(m);
 376
 377         if (m->meta.load_state != UNIT_LOADED)
 378                 return 0;
 379
 380         if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
 381                 return -ENOENT;
 382
 383         if (!(e = unit_name_from_path(m->where, ".mount")))
 384                 return -ENOMEM;
 385
 386         b = unit_has_name(UNIT(m), e);
 387         free(e);
 388
 389         if (!b) {
 390                 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
 391                 return -EINVAL;
 392         }
 393
 394         if (m->meta.fragment_path && !m->parameters_fragment.what) {
 395                 log_error("%s's What setting is missing. Refusing.", m->meta.id);
 396                 return -EBADMSG;
 397         }
 398
 399         if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 400                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
 401                 return -EINVAL;
 402         }
 403
 404         return 0;
 405 }
 406
 407 static int mount_load(Unit *u) {
 408         Mount *m = MOUNT(u);
 409         int r;
 410
 411         assert(u);
 412         assert(u->meta.load_state == UNIT_STUB);
 413
 414         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
 415                 return r;
 416
 417         /* This is a new unit? Then let's add in some extras */
 418         if (u->meta.load_state == UNIT_LOADED) {
 419                 const char *what = NULL;
 420
 421                 if (m->meta.fragment_path)
 422                         m->from_fragment = true;
 423
 424                 if (!m->where)
 425                         if (!(m->where = unit_name_to_path(u->meta.id)))
 426                                 return -ENOMEM;
 427
 428                 path_kill_slashes(m->where);
 429
 430                 if (!m->meta.description)
 431                         if ((r = unit_set_description(u, m->where)) < 0)
 432                                 return r;
 433
 434                 if (m->from_fragment && m->parameters_fragment.what)
 435                         what = m->parameters_fragment.what;
 436                 else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
 437                         what = m->parameters_etc_fstab.what;
 438                 else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
 439                         what = m->parameters_proc_self_mountinfo.what;
 440
 441                 if ((r = mount_add_device_links(m)) < 0)
 442                         return r;
 443
 444                 if ((r = mount_add_mount_links(m)) < 0)
 445                         return r;
 446
 447                 if ((r = mount_add_socket_links(m)) < 0)
 448                         return r;
 449
 450                 if ((r = mount_add_swap_links(m)) < 0)
 451                         return r;
 452
 453                 if ((r = mount_add_path_links(m)) < 0)
 454                         return r;
 455
 456                 if ((r = mount_add_automount_links(m)) < 0)
 457                         return r;
 458
 459                 if ((r = mount_add_target_links(m)) < 0)
 460                         return r;
 461
 462                 if ((r = unit_add_default_cgroup(u)) < 0)
 463                         return r;
 464
 465                 if (m->meta.default_dependencies)
 466                         if ((r = mount_add_default_dependencies(m)) < 0)
 467                                 return r;
 468         }
 469
 470         return mount_verify(m);
 471 }
 472
 473 static int mount_notify_automount(Mount *m, int status) {
 474         Unit *p;
 475         int r;
 476
 477         assert(m);
 478
 479         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
 480                 return r == -ENOENT ? 0 : r;
 481
 482         return automount_send_ready(AUTOMOUNT(p), status);
 483 }
 484
 485 static void mount_set_state(Mount *m, MountState state) {
 486         MountState old_state;
 487         assert(m);
 488
 489         old_state = m->state;
 490         m->state = state;
 491
 492         if (state != MOUNT_MOUNTING &&
 493             state != MOUNT_MOUNTING_DONE &&
 494             state != MOUNT_REMOUNTING &&
 495             state != MOUNT_UNMOUNTING &&
 496             state != MOUNT_MOUNTING_SIGTERM &&
 497             state != MOUNT_MOUNTING_SIGKILL &&
 498             state != MOUNT_UNMOUNTING_SIGTERM &&
 499             state != MOUNT_UNMOUNTING_SIGKILL &&
 500             state != MOUNT_REMOUNTING_SIGTERM &&
 501             state != MOUNT_REMOUNTING_SIGKILL) {
 502                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
 503                 mount_unwatch_control_pid(m);
 504                 m->control_command = NULL;
 505                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 506         }
 507
 508         if (state == MOUNT_MOUNTED ||
 509             state == MOUNT_REMOUNTING)
 510                 mount_notify_automount(m, 0);
 511         else if (state == MOUNT_DEAD ||
 512                  state == MOUNT_UNMOUNTING ||
 513                  state == MOUNT_MOUNTING_SIGTERM ||
 514                  state == MOUNT_MOUNTING_SIGKILL ||
 515                  state == MOUNT_REMOUNTING_SIGTERM ||
 516                  state == MOUNT_REMOUNTING_SIGKILL ||
 517                  state == MOUNT_UNMOUNTING_SIGTERM ||
 518                  state == MOUNT_UNMOUNTING_SIGKILL ||
 519                  state == MOUNT_FAILED)
 520                 mount_notify_automount(m, -ENODEV);
 521
 522         if (state != old_state)
 523                 log_debug("%s changed %s -> %s",
 524                           m->meta.id,
 525                           mount_state_to_string(old_state),
 526                           mount_state_to_string(state));
 527
 528         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
 529 }
 530
 531 static int mount_coldplug(Unit *u) {
 532         Mount *m = MOUNT(u);
 533         MountState new_state = MOUNT_DEAD;
 534         int r;
 535
 536         assert(m);
 537         assert(m->state == MOUNT_DEAD);
 538
 539         if (m->deserialized_state != m->state)
 540                 new_state = m->deserialized_state;
 541         else if (m->from_proc_self_mountinfo)
 542                 new_state = MOUNT_MOUNTED;
 543
 544         if (new_state != m->state) {
 545
 546                 if (new_state == MOUNT_MOUNTING ||
 547                     new_state == MOUNT_MOUNTING_DONE ||
 548                     new_state == MOUNT_REMOUNTING ||
 549                     new_state == MOUNT_UNMOUNTING ||
 550                     new_state == MOUNT_MOUNTING_SIGTERM ||
 551                     new_state == MOUNT_MOUNTING_SIGKILL ||
 552                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
 553                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
 554                     new_state == MOUNT_REMOUNTING_SIGTERM ||
 555                     new_state == MOUNT_REMOUNTING_SIGKILL) {
 556
 557                         if (m->control_pid <= 0)
 558                                 return -EBADMSG;
 559
 560                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
 561                                 return r;
 562
 563                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 564                                 return r;
 565                 }
 566
 567                 mount_set_state(m, new_state);
 568         }
 569
 570         return 0;
 571 }
 572
 573 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
 574         Mount *m = MOUNT(u);
 575         MountParameters *p;
 576
 577         assert(m);
 578         assert(f);
 579
 580         if (m->from_proc_self_mountinfo)
 581                 p = &m->parameters_proc_self_mountinfo;
 582         else if (m->from_fragment)
 583                 p = &m->parameters_fragment;
 584         else
 585                 p = &m->parameters_etc_fstab;
 586
 587         fprintf(f,
 588                 "%sMount State: %s\n"
 589                 "%sWhere: %s\n"
 590                 "%sWhat: %s\n"
 591                 "%sFile System Type: %s\n"
 592                 "%sOptions: %s\n"
 593                 "%sFrom /etc/fstab: %s\n"
 594                 "%sFrom /proc/self/mountinfo: %s\n"
 595                 "%sFrom fragment: %s\n"
 596                 "%sDirectoryMode: %04o\n",
 597                 prefix, mount_state_to_string(m->state),
 598                 prefix, m->where,
 599                 prefix, strna(p->what),
 600                 prefix, strna(p->fstype),
 601                 prefix, strna(p->options),
 602                 prefix, yes_no(m->from_etc_fstab),
 603                 prefix, yes_no(m->from_proc_self_mountinfo),
 604                 prefix, yes_no(m->from_fragment),
 605                 prefix, m->directory_mode);
 606
 607         if (m->control_pid > 0)
 608                 fprintf(f,
 609                         "%sControl PID: %lu\n",
 610                         prefix, (unsigned long) m->control_pid);
 611
 612         exec_context_dump(&m->exec_context, f, prefix);
 613 }
 614
 615 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 616         pid_t pid;
 617         int r;
 618
 619         assert(m);
 620         assert(c);
 621         assert(_pid);
 622
 623         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 624                 goto fail;
 625
 626         if ((r = exec_spawn(c,
 627                             NULL,
 628                             &m->exec_context,
 629                             NULL, 0,
 630                             m->meta.manager->environment,
 631                             true,
 632                             true,
 633                             true,
 634                             m->meta.manager->confirm_spawn,
 635                             m->meta.cgroup_bondings,
 636                             &pid)) < 0)
 637                 goto fail;
 638
 639         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 640                 /* FIXME: we need to do something here */
 641                 goto fail;
 642
 643         *_pid = pid;
 644
 645         return 0;
 646
 647 fail:
 648         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 649
 650         return r;
 651 }
 652
 653 static void mount_enter_dead(Mount *m, bool success) {
 654         assert(m);
 655
 656         if (!success)
 657                 m->failure = true;
 658
 659         mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
 660 }
 661
 662 static void mount_enter_mounted(Mount *m, bool success) {
 663         assert(m);
 664
 665         if (!success)
 666                 m->failure = true;
 667
 668         mount_set_state(m, MOUNT_MOUNTED);
 669 }
 670
 671 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 672         int r;
 673         Set *pid_set = NULL;
 674         bool wait_for_exit = false;
 675
 676         assert(m);
 677
 678         if (!success)
 679                 m->failure = true;
 680
 681         if (m->exec_context.kill_mode != KILL_NONE) {
 682                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 683                            state == MOUNT_UNMOUNTING_SIGTERM ||
 684                            state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
 685
 686                 if (m->control_pid > 0) {
 687                         if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
 688                                  -m->control_pid :
 689                                  m->control_pid, sig) < 0 && errno != ESRCH)
 690
 691                                 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
 692                         else
 693                                 wait_for_exit = true;
 694                 }
 695
 696                 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
 697
 698                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
 699                                 r = -ENOMEM;
 700                                 goto fail;
 701                         }
 702
 703                         /* Exclude the control pid from being killed via the cgroup */
 704                         if (m->control_pid > 0)
 705                                 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
 706                                         goto fail;
 707
 708                         if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
 709                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
 710                                         log_warning("Failed to kill control group: %s", strerror(-r));
 711                         } else if (r > 0)
 712                                 wait_for_exit = true;
 713
 714                         set_free(pid_set);
 715                 }
 716         }
 717
 718         if (wait_for_exit) {
 719                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 720                         goto fail;
 721
 722                 mount_set_state(m, state);
 723         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 724                 mount_enter_mounted(m, true);
 725         else
 726                 mount_enter_dead(m, true);
 727
 728         return;
 729
 730 fail:
 731         log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
 732
 733         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 734                 mount_enter_mounted(m, false);
 735         else
 736                 mount_enter_dead(m, false);
 737
 738         if (pid_set)
 739                 set_free(pid_set);
 740 }
 741
 742 static void mount_enter_unmounting(Mount *m, bool success) {
 743         int r;
 744
 745         assert(m);
 746
 747         if (!success)
 748                 m->failure = true;
 749
 750         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 751         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 752
 753         if ((r = exec_command_set(
 754                              m->control_command,
 755                              "/bin/umount",
 756                              m->where,
 757                              NULL)) < 0)
 758                 goto fail;
 759
 760         mount_unwatch_control_pid(m);
 761
 762         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 763                 goto fail;
 764
 765         mount_set_state(m, MOUNT_UNMOUNTING);
 766
 767         return;
 768
 769 fail:
 770         log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
 771         mount_enter_mounted(m, false);
 772 }
 773
 774 static void mount_enter_mounting(Mount *m) {
 775         int r;
 776
 777         assert(m);
 778
 779         m->control_command_id = MOUNT_EXEC_MOUNT;
 780         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 781
 782         mkdir_p(m->where, m->directory_mode);
 783
 784         if (m->from_fragment)
 785                 r = exec_command_set(
 786                                 m->control_command,
 787                                 "/bin/mount",
 788                                 m->parameters_fragment.what,
 789                                 m->where,
 790                                 "-t", m->parameters_fragment.fstype,
 791                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 792                                 NULL);
 793         else if (m->from_etc_fstab)
 794                 r = exec_command_set(
 795                                 m->control_command,
 796                                 "/bin/mount",
 797                                 m->where,
 798                                 NULL);
 799         else
 800                 r = -ENOENT;
 801
 802         if (r < 0)
 803                 goto fail;
 804
 805         mount_unwatch_control_pid(m);
 806
 807         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 808                 goto fail;
 809
 810         mount_set_state(m, MOUNT_MOUNTING);
 811
 812         return;
 813
 814 fail:
 815         log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
 816         mount_enter_dead(m, false);
 817 }
 818
 819 static void mount_enter_mounting_done(Mount *m) {
 820         assert(m);
 821
 822         mount_set_state(m, MOUNT_MOUNTING_DONE);
 823 }
 824
 825 static void mount_enter_remounting(Mount *m, bool success) {
 826         int r;
 827
 828         assert(m);
 829
 830         if (!success)
 831                 m->failure = true;
 832
 833         m->control_command_id = MOUNT_EXEC_REMOUNT;
 834         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 835
 836         if (m->from_fragment) {
 837                 char *buf = NULL;
 838                 const char *o;
 839
 840                 if (m->parameters_fragment.options) {
 841                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 842                                 r = -ENOMEM;
 843                                 goto fail;
 844                         }
 845
 846                         o = buf;
 847                 } else
 848                         o = "remount";
 849
 850                 r = exec_command_set(
 851                                 m->control_command,
 852                                 "/bin/mount",
 853                                 m->parameters_fragment.what,
 854                                 m->where,
 855                                 "-t", m->parameters_fragment.fstype,
 856                                 "-o", o,
 857                                 NULL);
 858
 859                 free(buf);
 860         } else if (m->from_etc_fstab)
 861                 r = exec_command_set(
 862                                 m->control_command,
 863                                 "/bin/mount",
 864                                 m->where,
 865                                 "-o", "remount",
 866                                 NULL);
 867         else
 868                 r = -ENOENT;
 869
 870         if (r < 0) {
 871                 r = -ENOMEM;
 872                 goto fail;
 873         }
 874
 875         mount_unwatch_control_pid(m);
 876
 877         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 878                 goto fail;
 879
 880         mount_set_state(m, MOUNT_REMOUNTING);
 881
 882         return;
 883
 884 fail:
 885         log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
 886         mount_enter_mounted(m, false);
 887 }
 888
 889 static int mount_start(Unit *u) {
 890         Mount *m = MOUNT(u);
 891
 892         assert(m);
 893
 894         /* We cannot fulfill this request right now, try again later
 895          * please! */
 896         if (m->state == MOUNT_UNMOUNTING ||
 897             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 898             m->state == MOUNT_UNMOUNTING_SIGKILL)
 899                 return -EAGAIN;
 900
 901         /* Already on it! */
 902         if (m->state == MOUNT_MOUNTING ||
 903             m->state == MOUNT_MOUNTING_SIGTERM ||
 904             m->state == MOUNT_MOUNTING_SIGKILL)
 905                 return 0;
 906
 907         assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
 908
 909         m->failure = false;
 910         mount_enter_mounting(m);
 911         return 0;
 912 }
 913
 914 static int mount_stop(Unit *u) {
 915         Mount *m = MOUNT(u);
 916
 917         assert(m);
 918
 919         /* Already on it */
 920         if (m->state == MOUNT_UNMOUNTING ||
 921             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 922             m->state == MOUNT_UNMOUNTING_SIGTERM)
 923                 return 0;
 924
 925         assert(m->state == MOUNT_MOUNTING ||
 926                m->state == MOUNT_MOUNTING_DONE ||
 927                m->state == MOUNT_MOUNTED ||
 928                m->state == MOUNT_MOUNTING_SIGTERM ||
 929                m->state == MOUNT_MOUNTING_SIGKILL ||
 930                m->state == MOUNT_REMOUNTING ||
 931                m->state == MOUNT_REMOUNTING_SIGTERM ||
 932                m->state == MOUNT_REMOUNTING_SIGKILL);
 933
 934         mount_enter_unmounting(m, true);
 935         return 0;
 936 }
 937
 938 static int mount_reload(Unit *u) {
 939         Mount *m = MOUNT(u);
 940
 941         assert(m);
 942
 943         if (m->state == MOUNT_MOUNTING_DONE)
 944                 return -EAGAIN;
 945
 946         assert(m->state == MOUNT_MOUNTED);
 947
 948         mount_enter_remounting(m, true);
 949         return 0;
 950 }
 951
 952 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
 953         Mount *m = MOUNT(u);
 954
 955         assert(m);
 956         assert(f);
 957         assert(fds);
 958
 959         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
 960         unit_serialize_item(u, f, "failure", yes_no(m->failure));
 961
 962         if (m->control_pid > 0)
 963                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
 964
 965         if (m->control_command_id >= 0)
 966                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
 967
 968         return 0;
 969 }
 970
 971 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
 972         Mount *m = MOUNT(u);
 973
 974         assert(u);
 975         assert(key);
 976         assert(value);
 977         assert(fds);
 978
 979         if (streq(key, "state")) {
 980                 MountState state;
 981
 982                 if ((state = mount_state_from_string(value)) < 0)
 983                         log_debug("Failed to parse state value %s", value);
 984                 else
 985                         m->deserialized_state = state;
 986         } else if (streq(key, "failure")) {
 987                 int b;
 988
 989                 if ((b = parse_boolean(value)) < 0)
 990                         log_debug("Failed to parse failure value %s", value);
 991                 else
 992                         m->failure = b || m->failure;
 993
 994         } else if (streq(key, "control-pid")) {
 995                 pid_t pid;
 996
 997                 if (parse_pid(value, &pid) < 0)
 998                         log_debug("Failed to parse control-pid value %s", value);
 999                 else
1000                         m->control_pid = pid;
1001         } else if (streq(key, "control-command")) {
1002                 MountExecCommand id;
1003
1004                 if ((id = mount_exec_command_from_string(value)) < 0)
1005                         log_debug("Failed to parse exec-command value %s", value);
1006                 else {
1007                         m->control_command_id = id;
1008                         m->control_command = m->exec_command + id;
1009                 }
1010
1011         } else
1012                 log_debug("Unknown serialization key '%s'", key);
1013
1014         return 0;
1015 }
1016
1017 static UnitActiveState mount_active_state(Unit *u) {
1018         assert(u);
1019
1020         return state_translation_table[MOUNT(u)->state];
1021 }
1022
1023 static const char *mount_sub_state_to_string(Unit *u) {
1024         assert(u);
1025
1026         return mount_state_to_string(MOUNT(u)->state);
1027 }
1028
1029 static bool mount_check_gc(Unit *u) {
1030         Mount *m = MOUNT(u);
1031
1032         assert(m);
1033
1034         return m->from_etc_fstab || m->from_proc_self_mountinfo;
1035 }
1036
1037 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1038         Mount *m = MOUNT(u);
1039         bool success;
1040
1041         assert(m);
1042         assert(pid >= 0);
1043
1044         if (pid != m->control_pid)
1045                 return;
1046
1047         m->control_pid = 0;
1048
1049         success = is_clean_exit(code, status);
1050         m->failure = m->failure || !success;
1051
1052         if (m->control_command) {
1053                 exec_status_exit(&m->control_command->exec_status, pid, code, status);
1054                 m->control_command = NULL;
1055                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1056         }
1057
1058         log_full(success ? LOG_DEBUG : LOG_NOTICE,
1059                  "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1060
1061         /* Note that mount(8) returning and the kernel sending us a
1062          * mount table change event might happen out-of-order. If an
1063          * operation succeed we assume the kernel will follow soon too
1064          * and already change into the resulting state.  If it fails
1065          * we check if the kernel still knows about the mount. and
1066          * change state accordingly. */
1067
1068         switch (m->state) {
1069
1070         case MOUNT_MOUNTING:
1071         case MOUNT_MOUNTING_DONE:
1072         case MOUNT_MOUNTING_SIGKILL:
1073         case MOUNT_MOUNTING_SIGTERM:
1074         case MOUNT_REMOUNTING:
1075         case MOUNT_REMOUNTING_SIGKILL:
1076         case MOUNT_REMOUNTING_SIGTERM:
1077
1078                 if (success)
1079                         mount_enter_mounted(m, true);
1080                 else if (m->from_proc_self_mountinfo)
1081                         mount_enter_mounted(m, false);
1082                 else
1083                         mount_enter_dead(m, false);
1084                 break;
1085
1086         case MOUNT_UNMOUNTING:
1087         case MOUNT_UNMOUNTING_SIGKILL:
1088         case MOUNT_UNMOUNTING_SIGTERM:
1089
1090                 if (success)
1091                         mount_enter_dead(m, true);
1092                 else if (m->from_proc_self_mountinfo)
1093                         mount_enter_mounted(m, false);
1094                 else
1095                         mount_enter_dead(m, false);
1096                 break;
1097
1098         default:
1099                 assert_not_reached("Uh, control process died at wrong time.");
1100         }
1101
1102         /* Notify clients about changed exit status */
1103         unit_add_to_dbus_queue(u);
1104 }
1105
1106 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1107         Mount *m = MOUNT(u);
1108
1109         assert(m);
1110         assert(elapsed == 1);
1111         assert(w == &m->timer_watch);
1112
1113         switch (m->state) {
1114
1115         case MOUNT_MOUNTING:
1116         case MOUNT_MOUNTING_DONE:
1117                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1118                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1119                 break;
1120
1121         case MOUNT_REMOUNTING:
1122                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1123                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1124                 break;
1125
1126         case MOUNT_UNMOUNTING:
1127                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1128                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1129                 break;
1130
1131         case MOUNT_MOUNTING_SIGTERM:
1132                 log_warning("%s mounting timed out. Killing.", u->meta.id);
1133                 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1134                 break;
1135
1136         case MOUNT_REMOUNTING_SIGTERM:
1137                 log_warning("%s remounting timed out. Killing.", u->meta.id);
1138                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1139                 break;
1140
1141         case MOUNT_UNMOUNTING_SIGTERM:
1142                 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1143                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1144                 break;
1145
1146         case MOUNT_MOUNTING_SIGKILL:
1147         case MOUNT_REMOUNTING_SIGKILL:
1148         case MOUNT_UNMOUNTING_SIGKILL:
1149                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1150
1151                 if (m->from_proc_self_mountinfo)
1152                         mount_enter_mounted(m, false);
1153                 else
1154                         mount_enter_dead(m, false);
1155                 break;
1156
1157         default:
1158                 assert_not_reached("Timeout at wrong time.");
1159         }
1160 }
1161
1162 static int mount_add_one(
1163                 Manager *m,
1164                 const char *what,
1165                 const char *where,
1166                 const char *options,
1167                 const char *fstype,
1168                 bool from_proc_self_mountinfo,
1169                 bool set_flags) {
1170         int r;
1171         Unit *u;
1172         bool delete;
1173         char *e, *w = NULL, *o = NULL, *f = NULL;
1174         MountParameters *p;
1175
1176         assert(m);
1177         assert(what);
1178         assert(where);
1179         assert(options);
1180         assert(fstype);
1181
1182         assert(!set_flags || from_proc_self_mountinfo);
1183
1184         /* Ignore API mount points. They should never be referenced in
1185          * dependencies ever. */
1186         if (mount_point_is_api(where))
1187                 return 0;
1188
1189         if (streq(fstype, "autofs"))
1190                 return 0;
1191
1192         /* probably some kind of swap, ignore */
1193         if (!is_path(where))
1194                 return 0;
1195
1196         if (!(e = unit_name_from_path(where, ".mount")))
1197                 return -ENOMEM;
1198
1199         if (!(u = manager_get_unit(m, e))) {
1200                 delete = true;
1201
1202                 if (!(u = unit_new(m))) {
1203                         free(e);
1204                         return -ENOMEM;
1205                 }
1206
1207                 r = unit_add_name(u, e);
1208                 free(e);
1209
1210                 if (r < 0)
1211                         goto fail;
1212
1213                 if (!(MOUNT(u)->where = strdup(where))) {
1214                         r = -ENOMEM;
1215                         goto fail;
1216                 }
1217
1218                 unit_add_to_load_queue(u);
1219         } else {
1220                 delete = false;
1221                 free(e);
1222         }
1223
1224         if (!(w = strdup(what)) ||
1225             !(o = strdup(options)) ||
1226             !(f = strdup(fstype))) {
1227                 r = -ENOMEM;
1228                 goto fail;
1229         }
1230
1231         if (from_proc_self_mountinfo) {
1232                 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1233
1234                 if (set_flags) {
1235                         MOUNT(u)->is_mounted = true;
1236                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1237                         MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1238                 }
1239
1240                 MOUNT(u)->from_proc_self_mountinfo = true;
1241         } else {
1242                 p = &MOUNT(u)->parameters_etc_fstab;
1243                 MOUNT(u)->from_etc_fstab = true;
1244         }
1245
1246         free(p->what);
1247         p->what = w;
1248
1249         free(p->options);
1250         p->options = o;
1251
1252         free(p->fstype);
1253         p->fstype = f;
1254
1255         unit_add_to_dbus_queue(u);
1256
1257         return 0;
1258
1259 fail:
1260         free(w);
1261         free(o);
1262         free(f);
1263
1264         if (delete && u)
1265                 unit_free(u);
1266
1267         return r;
1268 }
1269
1270 static char *fstab_node_to_udev_node(char *p) {
1271         char *dn, *t, *u;
1272         int r;
1273
1274         /* FIXME: to follow udev's logic 100% we need to leave valid
1275          * UTF8 chars unescaped */
1276
1277         if (startswith(p, "LABEL=")) {
1278
1279                 if (!(u = unquote(p+6, "\"\'")))
1280                         return NULL;
1281
1282                 t = xescape(u, "/ ");
1283                 free(u);
1284
1285                 if (!t)
1286                         return NULL;
1287
1288                 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1289                 free(t);
1290
1291                 if (r < 0)
1292                         return NULL;
1293
1294                 return dn;
1295         }
1296
1297         if (startswith(p, "UUID=")) {
1298
1299                 if (!(u = unquote(p+5, "\"\'")))
1300                         return NULL;
1301
1302                 t = xescape(u, "/ ");
1303                 free(u);
1304
1305                 if (!t)
1306                         return NULL;
1307
1308                 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1309                 free(t);
1310
1311                 if (r < 0)
1312                         return NULL;
1313
1314                 return dn;
1315         }
1316
1317         return strdup(p);
1318 }
1319
1320 static int mount_find_pri(char *options) {
1321         char *end, *pri;
1322         unsigned long r;
1323
1324         if (!(pri = mount_test_option(options, "pri=")))
1325                 return 0;
1326
1327         pri += 4;
1328
1329         errno = 0;
1330         r = strtoul(pri, &end, 10);
1331
1332         if (errno != 0)
1333                 return -errno;
1334
1335         if (end == pri || (*end != ',' && *end != 0))
1336                 return -EINVAL;
1337
1338         return (int) r;
1339 }
1340
1341 static int mount_load_etc_fstab(Manager *m) {
1342         FILE *f;
1343         int r;
1344         struct mntent* me;
1345
1346         assert(m);
1347
1348         errno = 0;
1349         if (!(f = setmntent("/etc/fstab", "r")))
1350                 return -errno;
1351
1352         while ((me = getmntent(f))) {
1353                 char *where, *what;
1354
1355                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1356                         r = -ENOMEM;
1357                         goto finish;
1358                 }
1359
1360                 if (!(where = strdup(me->mnt_dir))) {
1361                         free(what);
1362                         r = -ENOMEM;
1363                         goto finish;
1364                 }
1365
1366                 if (what[0] == '/')
1367                         path_kill_slashes(what);
1368
1369                 if (where[0] == '/')
1370                         path_kill_slashes(where);
1371
1372                 if (streq(me->mnt_type, "swap")) {
1373                         int pri;
1374
1375                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1376                                 r = pri;
1377                         else
1378                                 r = swap_add_one(m,
1379                                                  what,
1380                                                  pri,
1381                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1382                                                  !!mount_test_option(me->mnt_opts, "nofail"),
1383                                                  !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1384                                                  false);
1385                 } else
1386                         r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1387
1388                 free(what);
1389                 free(where);
1390
1391                 if (r < 0)
1392                         goto finish;
1393         }
1394
1395         r = 0;
1396 finish:
1397
1398         endmntent(f);
1399         return r;
1400 }
1401
1402 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1403         int r;
1404         char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1405
1406         assert(m);
1407
1408         rewind(m->proc_self_mountinfo);
1409
1410         for (;;) {
1411                 int k;
1412
1413                 device = path = options = options2 = fstype = d = p = o = NULL;
1414
1415                 if ((k = fscanf(m->proc_self_mountinfo,
1416                                 "%*s "       /* (1) mount id */
1417                                 "%*s "       /* (2) parent id */
1418                                 "%*s "       /* (3) major:minor */
1419                                 "%*s "       /* (4) root */
1420                                 "%ms "       /* (5) mount point */
1421                                 "%ms"        /* (6) mount options */
1422                                 "%*[^-]"     /* (7) optional fields */
1423                                 "- "         /* (8) seperator */
1424                                 "%ms "       /* (9) file system type */
1425                                 "%ms"        /* (10) mount source */
1426                                 "%ms"        /* (11) mount options 2 */
1427                                 "%*[^\n]",   /* some rubbish at the end */
1428                                 &path,
1429                                 &options,
1430                                 &fstype,
1431                                 &device,
1432                                 &options2)) != 5) {
1433
1434                         if (k == EOF)
1435                                 break;
1436
1437                         r = -EBADMSG;
1438                         goto finish;
1439                 }
1440
1441                 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1442                         r = -ENOMEM;
1443                         goto finish;
1444                 }
1445
1446                 if (!(d = cunescape(device)) ||
1447                     !(p = cunescape(path))) {
1448                         r = -ENOMEM;
1449                         goto finish;
1450                 }
1451
1452                 if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1453                         goto finish;
1454
1455                 free(device);
1456                 free(path);
1457                 free(options);
1458                 free(options2);
1459                 free(fstype);
1460                 free(d);
1461                 free(p);
1462                 free(o);
1463         }
1464
1465         r = 0;
1466
1467 finish:
1468         free(device);
1469         free(path);
1470         free(options);
1471         free(options2);
1472         free(fstype);
1473         free(d);
1474         free(p);
1475         free(o);
1476
1477         return r;
1478 }
1479
1480 static void mount_shutdown(Manager *m) {
1481         assert(m);
1482
1483         if (m->proc_self_mountinfo) {
1484                 fclose(m->proc_self_mountinfo);
1485                 m->proc_self_mountinfo = NULL;
1486         }
1487 }
1488
1489 static int mount_enumerate(Manager *m) {
1490         int r;
1491         struct epoll_event ev;
1492         assert(m);
1493
1494         if (!m->proc_self_mountinfo) {
1495                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1496                         return -errno;
1497
1498                 m->mount_watch.type = WATCH_MOUNT;
1499                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1500
1501                 zero(ev);
1502                 ev.events = EPOLLERR;
1503                 ev.data.ptr = &m->mount_watch;
1504
1505                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1506                         return -errno;
1507         }
1508
1509         if ((r = mount_load_etc_fstab(m)) < 0)
1510                 goto fail;
1511
1512         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1513                 goto fail;
1514
1515         return 0;
1516
1517 fail:
1518         mount_shutdown(m);
1519         return r;
1520 }
1521
1522 void mount_fd_event(Manager *m, int events) {
1523         Meta *meta;
1524         int r;
1525
1526         assert(m);
1527         assert(events == EPOLLERR);
1528
1529         /* The manager calls this for every fd event happening on the
1530          * /proc/self/mountinfo file, which informs us about mounting
1531          * table changes */
1532
1533         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1534                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1535
1536                 /* Reset flags, just in case, for later calls */
1537                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1538                         Mount *mount = (Mount*) meta;
1539
1540                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1541                 }
1542
1543                 return;
1544         }
1545
1546         manager_dispatch_load_queue(m);
1547
1548         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1549                 Mount *mount = (Mount*) meta;
1550
1551                 if (!mount->is_mounted) {
1552                         /* This has just been unmounted. */
1553
1554                         mount->from_proc_self_mountinfo = false;
1555
1556                         switch (mount->state) {
1557
1558                         case MOUNT_MOUNTED:
1559                                 mount_enter_dead(mount, true);
1560                                 break;
1561
1562                         default:
1563                                 mount_set_state(mount, mount->state);
1564                                 break;
1565
1566                         }
1567
1568                 } else if (mount->just_mounted || mount->just_changed) {
1569
1570                         /* New or changed entrymount */
1571
1572                         switch (mount->state) {
1573
1574                         case MOUNT_DEAD:
1575                         case MOUNT_FAILED:
1576                                 mount_enter_mounted(mount, true);
1577                                 break;
1578
1579                         case MOUNT_MOUNTING:
1580                                 mount_enter_mounting_done(mount);
1581                                 break;
1582
1583                         default:
1584                                 /* Nothing really changed, but let's
1585                                  * issue an notification call
1586                                  * nonetheless, in case somebody is
1587                                  * waiting for this. (e.g. file system
1588                                  * ro/rw remounts.) */
1589                                 mount_set_state(mount, mount->state);
1590                                 break;
1591                         }
1592                 }
1593
1594                 /* Reset the flags for later calls */
1595                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1596         }
1597 }
1598
1599 static void mount_reset_failed(Unit *u) {
1600         Mount *m = MOUNT(u);
1601
1602         assert(m);
1603
1604         if (m->state == MOUNT_FAILED)
1605                 mount_set_state(m, MOUNT_DEAD);
1606
1607         m->failure = false;
1608 }
1609
1610 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1611         [MOUNT_DEAD] = "dead",
1612         [MOUNT_MOUNTING] = "mounting",
1613         [MOUNT_MOUNTING_DONE] = "mounting-done",
1614         [MOUNT_MOUNTED] = "mounted",
1615         [MOUNT_REMOUNTING] = "remounting",
1616         [MOUNT_UNMOUNTING] = "unmounting",
1617         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1618         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1619         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1620         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1621         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1622         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1623         [MOUNT_FAILED] = "failed"
1624 };
1625
1626 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1627
1628 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1629         [MOUNT_EXEC_MOUNT] = "ExecMount",
1630         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1631         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1632 };
1633
1634 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1635
1636 const UnitVTable mount_vtable = {
1637         .suffix = ".mount",
1638
1639         .no_alias = true,
1640         .no_instances = true,
1641         .no_isolate = true,
1642         .show_status = true,
1643
1644         .init = mount_init,
1645         .load = mount_load,
1646         .done = mount_done,
1647
1648         .coldplug = mount_coldplug,
1649
1650         .dump = mount_dump,
1651
1652         .start = mount_start,
1653         .stop = mount_stop,
1654         .reload = mount_reload,
1655
1656         .serialize = mount_serialize,
1657         .deserialize_item = mount_deserialize_item,
1658
1659         .active_state = mount_active_state,
1660         .sub_state_to_string = mount_sub_state_to_string,
1661
1662         .check_gc = mount_check_gc,
1663
1664         .sigchld_event = mount_sigchld_event,
1665         .timer_event = mount_timer_event,
1666
1667         .reset_failed = mount_reset_failed,
1668
1669         .bus_interface = "org.freedesktop.systemd1.Mount",
1670         .bus_message_handler = bus_mount_message_handler,
1671         .bus_invalidating_properties =  bus_mount_invalidating_properties,
1672
1673         .enumerate = mount_enumerate,
1674         .shutdown = mount_shutdown
1675 };