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 #include "bus-errors.h"
  39 #include "exit-status.h"
  40 #include "def.h"
  41
  42 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
  43         [MOUNT_DEAD] = UNIT_INACTIVE,
  44         [MOUNT_MOUNTING] = UNIT_ACTIVATING,
  45         [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
  46         [MOUNT_MOUNTED] = UNIT_ACTIVE,
  47         [MOUNT_REMOUNTING] = UNIT_RELOADING,
  48         [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
  49         [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  50         [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  51         [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
  52         [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
  53         [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  54         [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  55         [MOUNT_FAILED] = UNIT_FAILED
  56 };
  57
  58 static void mount_init(Unit *u) {
  59         Mount *m = MOUNT(u);
  60
  61         assert(u);
  62         assert(u->meta.load_state == UNIT_STUB);
  63
  64         m->timeout_usec = DEFAULT_TIMEOUT_USEC;
  65         m->directory_mode = 0755;
  66
  67         exec_context_init(&m->exec_context);
  68         m->exec_context.std_output = EXEC_OUTPUT_KMSG;
  69
  70         /* We need to make sure that /bin/mount is always called in
  71          * the same process group as us, so that the autofs kernel
  72          * side doesn't send us another mount request while we are
  73          * already trying to comply its last one. */
  74         m->exec_context.same_pgrp = true;
  75
  76         m->timer_watch.type = WATCH_INVALID;
  77
  78         m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
  79 }
  80
  81 static void mount_unwatch_control_pid(Mount *m) {
  82         assert(m);
  83
  84         if (m->control_pid <= 0)
  85                 return;
  86
  87         unit_unwatch_pid(UNIT(m), m->control_pid);
  88         m->control_pid = 0;
  89 }
  90
  91 static void mount_parameters_done(MountParameters *p) {
  92         assert(p);
  93
  94         free(p->what);
  95         free(p->options);
  96         free(p->fstype);
  97
  98         p->what = p->options = p->fstype = NULL;
  99 }
 100
 101 static void mount_done(Unit *u) {
 102         Mount *m = MOUNT(u);
 103         Meta *other;
 104
 105         assert(m);
 106
 107         free(m->where);
 108         m->where = NULL;
 109
 110         /* Try to detach us from the automount unit if there is any */
 111         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT]) {
 112                 Automount *a = (Automount*) other;
 113
 114                 if (a->mount == m)
 115                         a->mount = NULL;
 116         }
 117
 118         mount_parameters_done(&m->parameters_etc_fstab);
 119         mount_parameters_done(&m->parameters_proc_self_mountinfo);
 120         mount_parameters_done(&m->parameters_fragment);
 121
 122         exec_context_done(&m->exec_context);
 123         exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
 124         m->control_command = NULL;
 125
 126         mount_unwatch_control_pid(m);
 127
 128         unit_unwatch_timer(u, &m->timer_watch);
 129 }
 130
 131 static int mount_add_mount_links(Mount *m) {
 132         Meta *other;
 133         int r;
 134         MountParameters *pm;
 135
 136         assert(m);
 137
 138         if (m->from_fragment)
 139                 pm = &m->parameters_fragment;
 140         else if (m->from_etc_fstab)
 141                 pm = &m->parameters_etc_fstab;
 142         else
 143                 pm = NULL;
 144
 145         /* Adds in links to other mount points that might lie below or
 146          * above us in the hierarchy */
 147
 148         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
 149                 Mount *n = (Mount*) other;
 150                 MountParameters *pn;
 151
 152                 if (n == m)
 153                         continue;
 154
 155                 if (n->meta.load_state != UNIT_LOADED)
 156                         continue;
 157
 158                 if (n->from_fragment)
 159                         pn = &n->parameters_fragment;
 160                 else if (n->from_etc_fstab)
 161                         pn = &n->parameters_etc_fstab;
 162                 else
 163                         pn = NULL;
 164
 165                 if (path_startswith(m->where, n->where)) {
 166
 167                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 168                                 return r;
 169
 170                         if (n->from_etc_fstab || n->from_fragment)
 171                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 172                                         return r;
 173
 174                 } else if (path_startswith(n->where, m->where)) {
 175
 176                         if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
 177                                 return r;
 178
 179                         if (m->from_etc_fstab || m->from_fragment)
 180                                 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 181                                         return r;
 182
 183                 } else if (pm && path_startswith(pm->what, n->where)) {
 184
 185                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 186                                 return r;
 187
 188                         if (m->from_etc_fstab || m->from_fragment)
 189                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 190                                         return r;
 191
 192                 } else if (pn && path_startswith(pn->what, m->where)) {
 193
 194                         if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
 195                                 return r;
 196
 197                         if (n->from_etc_fstab || n->from_fragment)
 198                                 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 199                                         return r;
 200                 }
 201         }
 202
 203         return 0;
 204 }
 205
 206 static int mount_add_swap_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_SWAP])
 213                 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
 214                         return r;
 215
 216         return 0;
 217 }
 218
 219 static int mount_add_path_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_PATH])
 226                 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
 227                         return r;
 228
 229         return 0;
 230 }
 231
 232 static int mount_add_automount_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_AUTOMOUNT])
 239                 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
 240                         return r;
 241
 242         return 0;
 243 }
 244
 245 static int mount_add_socket_links(Mount *m) {
 246         Meta *other;
 247         int r;
 248
 249         assert(m);
 250
 251         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
 252                 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
 253                         return r;
 254
 255         return 0;
 256 }
 257
 258 static char* mount_test_option(const char *haystack, const char *needle) {
 259         struct mntent me;
 260
 261         assert(needle);
 262
 263         /* Like glibc's hasmntopt(), but works on a string, not a
 264          * struct mntent */
 265
 266         if (!haystack)
 267                 return false;
 268
 269         zero(me);
 270         me.mnt_opts = (char*) haystack;
 271
 272         return hasmntopt(&me, needle);
 273 }
 274
 275 static int mount_add_target_links(Mount *m) {
 276         const char *target, *after = NULL;
 277         MountParameters *p;
 278         Unit *tu;
 279         int r;
 280         bool noauto, nofail, handle, automount;
 281
 282         assert(m);
 283
 284         if (m->from_fragment)
 285                 p = &m->parameters_fragment;
 286         else if (m->from_etc_fstab)
 287                 p = &m->parameters_etc_fstab;
 288         else
 289                 return 0;
 290
 291         noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 292         nofail = !!mount_test_option(p->options, "nofail");
 293         handle =
 294                 mount_test_option(p->options, "comment=systemd.mount") ||
 295                 mount_test_option(p->options, "x-systemd-mount") ||
 296                 m->meta.manager->mount_auto;
 297         automount =
 298                 mount_test_option(p->options, "comment=systemd.automount") ||
 299                 mount_test_option(p->options, "x-systemd-automount");
 300
 301         if (mount_test_option(p->options, "_netdev") ||
 302             (p->fstype && fstype_is_network(p->fstype))) {
 303                 target = SPECIAL_REMOTE_FS_TARGET;
 304
 305                 if (m->meta.manager->running_as == MANAGER_SYSTEM)
 306                         after = SPECIAL_NETWORK_TARGET;
 307         } else
 308                 target = SPECIAL_LOCAL_FS_TARGET;
 309
 310         if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
 311                 return r;
 312
 313         if (after)
 314                 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
 315                         return r;
 316
 317         if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
 318                 Unit *am;
 319
 320                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
 321                         return r;
 322
 323                 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
 324         } else {
 325
 326                 /* Automatically add mount points that aren't natively
 327                  * configured to local-fs.target */
 328                 if (!noauto &&
 329                     !nofail &&
 330                     handle &&
 331                     m->from_etc_fstab &&
 332                     m->meta.manager->running_as == MANAGER_SYSTEM)
 333                         if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
 334                                 return r;
 335
 336                 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
 337         }
 338 }
 339
 340 static bool mount_is_bind(MountParameters *p) {
 341         assert(p);
 342
 343         if (p->fstype && streq(p->fstype, "bind"))
 344                 return true;
 345
 346         if (mount_test_option(p->options, "bind"))
 347                 return true;
 348
 349         return false;
 350 }
 351
 352 static int mount_add_device_links(Mount *m) {
 353         MountParameters *p;
 354         int r;
 355
 356         assert(m);
 357
 358         if (m->from_fragment)
 359                 p = &m->parameters_fragment;
 360         else if (m->from_etc_fstab)
 361                 p = &m->parameters_etc_fstab;
 362         else
 363                 return 0;
 364
 365         if (!p->what)
 366                 return 0;
 367
 368         if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
 369                 bool nofail, noauto;
 370
 371                 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 372                 nofail = !!mount_test_option(p->options, "nofail");
 373
 374                 if ((r = unit_add_node_link(UNIT(m), p->what,
 375                                             !noauto && nofail &&
 376                                             UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
 377                         return r;
 378         }
 379
 380         if (p->passno > 0 &&
 381             !mount_is_bind(p) &&
 382             UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
 383             !path_equal(m->where, "/")) {
 384                 char *name;
 385                 Unit *fsck;
 386                 /* Let's add in the fsck service */
 387
 388                 /* aka SPECIAL_FSCK_SERVICE */
 389                 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
 390                         return -ENOMEM;
 391
 392                 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
 393                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
 394                         free(name);
 395                         return r;
 396                 }
 397
 398                 free(name);
 399
 400                 SERVICE(fsck)->fsck_passno = p->passno;
 401
 402                 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
 403                         return r;
 404         }
 405
 406         return 0;
 407 }
 408
 409 static int mount_add_default_dependencies(Mount *m) {
 410         int r;
 411
 412         assert(m);
 413
 414         if (m->meta.manager->running_as == MANAGER_SYSTEM &&
 415             !path_equal(m->where, "/")) {
 416                 MountParameters *p;
 417
 418                 if (m->from_fragment)
 419                         p = &m->parameters_fragment;
 420                 else if (m->from_etc_fstab)
 421                         p = &m->parameters_etc_fstab;
 422                 else
 423                         p = NULL;
 424
 425                 if (!p ||
 426                     (!mount_test_option(p->options, "_netdev") &&
 427                     !(p->fstype && fstype_is_network(p->fstype)) &&
 428                     (mount_test_option(p->options, "usrquota") || mount_test_option(p->options, "grpquota"))))
 429                         if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
 430                             (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
 431                                 return r;
 432
 433                 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
 434                         return r;
 435         }
 436
 437         return 0;
 438 }
 439
 440 static int mount_verify(Mount *m) {
 441         bool b;
 442         char *e;
 443         assert(m);
 444
 445         if (m->meta.load_state != UNIT_LOADED)
 446                 return 0;
 447
 448         if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
 449                 return -ENOENT;
 450
 451         if (!(e = unit_name_from_path(m->where, ".mount")))
 452                 return -ENOMEM;
 453
 454         b = unit_has_name(UNIT(m), e);
 455         free(e);
 456
 457         if (!b) {
 458                 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
 459                 return -EINVAL;
 460         }
 461
 462         if (m->meta.fragment_path && !m->parameters_fragment.what) {
 463                 log_error("%s's What setting is missing. Refusing.", m->meta.id);
 464                 return -EBADMSG;
 465         }
 466
 467         if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 468                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
 469                 return -EINVAL;
 470         }
 471
 472         return 0;
 473 }
 474
 475 static int mount_load(Unit *u) {
 476         Mount *m = MOUNT(u);
 477         int r;
 478
 479         assert(u);
 480         assert(u->meta.load_state == UNIT_STUB);
 481
 482         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
 483                 return r;
 484
 485         /* This is a new unit? Then let's add in some extras */
 486         if (u->meta.load_state == UNIT_LOADED) {
 487                 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
 488                         return r;
 489
 490                 if (m->meta.fragment_path)
 491                         m->from_fragment = true;
 492
 493                 if (!m->where)
 494                         if (!(m->where = unit_name_to_path(u->meta.id)))
 495                                 return -ENOMEM;
 496
 497                 path_kill_slashes(m->where);
 498
 499                 if (!m->meta.description)
 500                         if ((r = unit_set_description(u, m->where)) < 0)
 501                                 return r;
 502
 503                 if ((r = mount_add_device_links(m)) < 0)
 504                         return r;
 505
 506                 if ((r = mount_add_mount_links(m)) < 0)
 507                         return r;
 508
 509                 if ((r = mount_add_socket_links(m)) < 0)
 510                         return r;
 511
 512                 if ((r = mount_add_swap_links(m)) < 0)
 513                         return r;
 514
 515                 if ((r = mount_add_path_links(m)) < 0)
 516                         return r;
 517
 518                 if ((r = mount_add_automount_links(m)) < 0)
 519                         return r;
 520
 521                 if ((r = mount_add_target_links(m)) < 0)
 522                         return r;
 523
 524                 if ((r = unit_add_default_cgroups(u)) < 0)
 525                         return r;
 526
 527                 if (m->meta.default_dependencies)
 528                         if ((r = mount_add_default_dependencies(m)) < 0)
 529                                 return r;
 530         }
 531
 532         return mount_verify(m);
 533 }
 534
 535 static int mount_notify_automount(Mount *m, int status) {
 536         Unit *p;
 537         int r;
 538
 539         assert(m);
 540
 541         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
 542                 return r == -ENOENT ? 0 : r;
 543
 544         return automount_send_ready(AUTOMOUNT(p), status);
 545 }
 546
 547 static void mount_set_state(Mount *m, MountState state) {
 548         MountState old_state;
 549         assert(m);
 550
 551         old_state = m->state;
 552         m->state = state;
 553
 554         if (state != MOUNT_MOUNTING &&
 555             state != MOUNT_MOUNTING_DONE &&
 556             state != MOUNT_REMOUNTING &&
 557             state != MOUNT_UNMOUNTING &&
 558             state != MOUNT_MOUNTING_SIGTERM &&
 559             state != MOUNT_MOUNTING_SIGKILL &&
 560             state != MOUNT_UNMOUNTING_SIGTERM &&
 561             state != MOUNT_UNMOUNTING_SIGKILL &&
 562             state != MOUNT_REMOUNTING_SIGTERM &&
 563             state != MOUNT_REMOUNTING_SIGKILL) {
 564                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
 565                 mount_unwatch_control_pid(m);
 566                 m->control_command = NULL;
 567                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 568         }
 569
 570         if (state == MOUNT_MOUNTED ||
 571             state == MOUNT_REMOUNTING)
 572                 mount_notify_automount(m, 0);
 573         else if (state == MOUNT_DEAD ||
 574                  state == MOUNT_UNMOUNTING ||
 575                  state == MOUNT_MOUNTING_SIGTERM ||
 576                  state == MOUNT_MOUNTING_SIGKILL ||
 577                  state == MOUNT_REMOUNTING_SIGTERM ||
 578                  state == MOUNT_REMOUNTING_SIGKILL ||
 579                  state == MOUNT_UNMOUNTING_SIGTERM ||
 580                  state == MOUNT_UNMOUNTING_SIGKILL ||
 581                  state == MOUNT_FAILED)
 582                 mount_notify_automount(m, -ENODEV);
 583
 584         if (state != old_state)
 585                 log_debug("%s changed %s -> %s",
 586                           m->meta.id,
 587                           mount_state_to_string(old_state),
 588                           mount_state_to_string(state));
 589
 590         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
 591         m->reload_failure = false;
 592 }
 593
 594 static int mount_coldplug(Unit *u) {
 595         Mount *m = MOUNT(u);
 596         MountState new_state = MOUNT_DEAD;
 597         int r;
 598
 599         assert(m);
 600         assert(m->state == MOUNT_DEAD);
 601
 602         if (m->deserialized_state != m->state)
 603                 new_state = m->deserialized_state;
 604         else if (m->from_proc_self_mountinfo)
 605                 new_state = MOUNT_MOUNTED;
 606
 607         if (new_state != m->state) {
 608
 609                 if (new_state == MOUNT_MOUNTING ||
 610                     new_state == MOUNT_MOUNTING_DONE ||
 611                     new_state == MOUNT_REMOUNTING ||
 612                     new_state == MOUNT_UNMOUNTING ||
 613                     new_state == MOUNT_MOUNTING_SIGTERM ||
 614                     new_state == MOUNT_MOUNTING_SIGKILL ||
 615                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
 616                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
 617                     new_state == MOUNT_REMOUNTING_SIGTERM ||
 618                     new_state == MOUNT_REMOUNTING_SIGKILL) {
 619
 620                         if (m->control_pid <= 0)
 621                                 return -EBADMSG;
 622
 623                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
 624                                 return r;
 625
 626                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 627                                 return r;
 628                 }
 629
 630                 mount_set_state(m, new_state);
 631         }
 632
 633         return 0;
 634 }
 635
 636 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
 637         Mount *m = MOUNT(u);
 638         MountParameters *p;
 639
 640         assert(m);
 641         assert(f);
 642
 643         if (m->from_proc_self_mountinfo)
 644                 p = &m->parameters_proc_self_mountinfo;
 645         else if (m->from_fragment)
 646                 p = &m->parameters_fragment;
 647         else
 648                 p = &m->parameters_etc_fstab;
 649
 650         fprintf(f,
 651                 "%sMount State: %s\n"
 652                 "%sWhere: %s\n"
 653                 "%sWhat: %s\n"
 654                 "%sFile System Type: %s\n"
 655                 "%sOptions: %s\n"
 656                 "%sFrom /etc/fstab: %s\n"
 657                 "%sFrom /proc/self/mountinfo: %s\n"
 658                 "%sFrom fragment: %s\n"
 659                 "%sDirectoryMode: %04o\n",
 660                 prefix, mount_state_to_string(m->state),
 661                 prefix, m->where,
 662                 prefix, strna(p->what),
 663                 prefix, strna(p->fstype),
 664                 prefix, strna(p->options),
 665                 prefix, yes_no(m->from_etc_fstab),
 666                 prefix, yes_no(m->from_proc_self_mountinfo),
 667                 prefix, yes_no(m->from_fragment),
 668                 prefix, m->directory_mode);
 669
 670         if (m->control_pid > 0)
 671                 fprintf(f,
 672                         "%sControl PID: %lu\n",
 673                         prefix, (unsigned long) m->control_pid);
 674
 675         exec_context_dump(&m->exec_context, f, prefix);
 676 }
 677
 678 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 679         pid_t pid;
 680         int r;
 681
 682         assert(m);
 683         assert(c);
 684         assert(_pid);
 685
 686         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 687                 goto fail;
 688
 689         if ((r = exec_spawn(c,
 690                             NULL,
 691                             &m->exec_context,
 692                             NULL, 0,
 693                             m->meta.manager->environment,
 694                             true,
 695                             true,
 696                             true,
 697                             m->meta.manager->confirm_spawn,
 698                             m->meta.cgroup_bondings,
 699                             &pid)) < 0)
 700                 goto fail;
 701
 702         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 703                 /* FIXME: we need to do something here */
 704                 goto fail;
 705
 706         *_pid = pid;
 707
 708         return 0;
 709
 710 fail:
 711         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 712
 713         return r;
 714 }
 715
 716 static void mount_enter_dead(Mount *m, bool success) {
 717         assert(m);
 718
 719         if (!success)
 720                 m->failure = true;
 721
 722         mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
 723 }
 724
 725 static void mount_enter_mounted(Mount *m, bool success) {
 726         assert(m);
 727
 728         if (!success)
 729                 m->failure = true;
 730
 731         mount_set_state(m, MOUNT_MOUNTED);
 732 }
 733
 734 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 735         int r;
 736         Set *pid_set = NULL;
 737         bool wait_for_exit = false;
 738
 739         assert(m);
 740
 741         if (!success)
 742                 m->failure = true;
 743
 744         if (m->exec_context.kill_mode != KILL_NONE) {
 745                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 746                            state == MOUNT_UNMOUNTING_SIGTERM ||
 747                            state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
 748
 749                 if (m->control_pid > 0) {
 750                         if (kill_and_sigcont(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
 751                                              -m->control_pid :
 752                                              m->control_pid, sig) < 0 && errno != ESRCH)
 753
 754                                 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
 755                         else
 756                                 wait_for_exit = true;
 757                 }
 758
 759                 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
 760
 761                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
 762                                 r = -ENOMEM;
 763                                 goto fail;
 764                         }
 765
 766                         /* Exclude the control pid from being killed via the cgroup */
 767                         if (m->control_pid > 0)
 768                                 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
 769                                         goto fail;
 770
 771                         if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
 772                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
 773                                         log_warning("Failed to kill control group: %s", strerror(-r));
 774                         } else if (r > 0)
 775                                 wait_for_exit = true;
 776
 777                         set_free(pid_set);
 778                 }
 779         }
 780
 781         if (wait_for_exit) {
 782                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 783                         goto fail;
 784
 785                 mount_set_state(m, state);
 786         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 787                 mount_enter_mounted(m, true);
 788         else
 789                 mount_enter_dead(m, true);
 790
 791         return;
 792
 793 fail:
 794         log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
 795
 796         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 797                 mount_enter_mounted(m, false);
 798         else
 799                 mount_enter_dead(m, false);
 800
 801         if (pid_set)
 802                 set_free(pid_set);
 803 }
 804
 805 static void mount_enter_unmounting(Mount *m, bool success) {
 806         int r;
 807
 808         assert(m);
 809
 810         if (!success)
 811                 m->failure = true;
 812
 813         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 814         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 815
 816         if ((r = exec_command_set(
 817                              m->control_command,
 818                              "/bin/umount",
 819                              m->where,
 820                              NULL)) < 0)
 821                 goto fail;
 822
 823         mount_unwatch_control_pid(m);
 824
 825         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 826                 goto fail;
 827
 828         mount_set_state(m, MOUNT_UNMOUNTING);
 829
 830         return;
 831
 832 fail:
 833         log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
 834         mount_enter_mounted(m, false);
 835 }
 836
 837 static void mount_enter_mounting(Mount *m) {
 838         int r;
 839
 840         assert(m);
 841
 842         m->control_command_id = MOUNT_EXEC_MOUNT;
 843         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 844
 845         mkdir_p(m->where, m->directory_mode);
 846
 847         if (m->from_fragment)
 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                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 855                                 NULL);
 856         else if (m->from_etc_fstab)
 857                 r = exec_command_set(
 858                                 m->control_command,
 859                                 "/bin/mount",
 860                                 m->where,
 861                                 NULL);
 862         else
 863                 r = -ENOENT;
 864
 865         if (r < 0)
 866                 goto fail;
 867
 868         mount_unwatch_control_pid(m);
 869
 870         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 871                 goto fail;
 872
 873         mount_set_state(m, MOUNT_MOUNTING);
 874
 875         return;
 876
 877 fail:
 878         log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
 879         mount_enter_dead(m, false);
 880 }
 881
 882 static void mount_enter_mounting_done(Mount *m) {
 883         assert(m);
 884
 885         mount_set_state(m, MOUNT_MOUNTING_DONE);
 886 }
 887
 888 static void mount_enter_remounting(Mount *m, bool success) {
 889         int r;
 890
 891         assert(m);
 892
 893         if (!success)
 894                 m->failure = true;
 895
 896         m->control_command_id = MOUNT_EXEC_REMOUNT;
 897         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 898
 899         if (m->from_fragment) {
 900                 char *buf = NULL;
 901                 const char *o;
 902
 903                 if (m->parameters_fragment.options) {
 904                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 905                                 r = -ENOMEM;
 906                                 goto fail;
 907                         }
 908
 909                         o = buf;
 910                 } else
 911                         o = "remount";
 912
 913                 r = exec_command_set(
 914                                 m->control_command,
 915                                 "/bin/mount",
 916                                 m->parameters_fragment.what,
 917                                 m->where,
 918                                 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
 919                                 "-o", o,
 920                                 NULL);
 921
 922                 free(buf);
 923         } else if (m->from_etc_fstab)
 924                 r = exec_command_set(
 925                                 m->control_command,
 926                                 "/bin/mount",
 927                                 m->where,
 928                                 "-o", "remount",
 929                                 NULL);
 930         else
 931                 r = -ENOENT;
 932
 933         if (r < 0)
 934                 goto fail;
 935
 936         mount_unwatch_control_pid(m);
 937
 938         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 939                 goto fail;
 940
 941         mount_set_state(m, MOUNT_REMOUNTING);
 942
 943         return;
 944
 945 fail:
 946         log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
 947         m->reload_failure = true;
 948         mount_enter_mounted(m, true);
 949 }
 950
 951 static int mount_start(Unit *u) {
 952         Mount *m = MOUNT(u);
 953
 954         assert(m);
 955
 956         /* We cannot fulfill this request right now, try again later
 957          * please! */
 958         if (m->state == MOUNT_UNMOUNTING ||
 959             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 960             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 961             m->state == MOUNT_MOUNTING_SIGTERM ||
 962             m->state == MOUNT_MOUNTING_SIGKILL)
 963                 return -EAGAIN;
 964
 965         /* Already on it! */
 966         if (m->state == MOUNT_MOUNTING)
 967                 return 0;
 968
 969         assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
 970
 971         m->failure = false;
 972         mount_enter_mounting(m);
 973         return 0;
 974 }
 975
 976 static int mount_stop(Unit *u) {
 977         Mount *m = MOUNT(u);
 978
 979         assert(m);
 980
 981         /* Already on it */
 982         if (m->state == MOUNT_UNMOUNTING ||
 983             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 984             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 985             m->state == MOUNT_MOUNTING_SIGTERM ||
 986             m->state == MOUNT_MOUNTING_SIGKILL)
 987                 return 0;
 988
 989         assert(m->state == MOUNT_MOUNTING ||
 990                m->state == MOUNT_MOUNTING_DONE ||
 991                m->state == MOUNT_MOUNTED ||
 992                m->state == MOUNT_REMOUNTING ||
 993                m->state == MOUNT_REMOUNTING_SIGTERM ||
 994                m->state == MOUNT_REMOUNTING_SIGKILL);
 995
 996         mount_enter_unmounting(m, true);
 997         return 0;
 998 }
 999
1000 static int mount_reload(Unit *u) {
1001         Mount *m = MOUNT(u);
1002
1003         assert(m);
1004
1005         if (m->state == MOUNT_MOUNTING_DONE)
1006                 return -EAGAIN;
1007
1008         assert(m->state == MOUNT_MOUNTED);
1009
1010         mount_enter_remounting(m, true);
1011         return 0;
1012 }
1013
1014 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1015         Mount *m = MOUNT(u);
1016
1017         assert(m);
1018         assert(f);
1019         assert(fds);
1020
1021         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1022         unit_serialize_item(u, f, "failure", yes_no(m->failure));
1023
1024         if (m->control_pid > 0)
1025                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1026
1027         if (m->control_command_id >= 0)
1028                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1029
1030         return 0;
1031 }
1032
1033 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1034         Mount *m = MOUNT(u);
1035
1036         assert(u);
1037         assert(key);
1038         assert(value);
1039         assert(fds);
1040
1041         if (streq(key, "state")) {
1042                 MountState state;
1043
1044                 if ((state = mount_state_from_string(value)) < 0)
1045                         log_debug("Failed to parse state value %s", value);
1046                 else
1047                         m->deserialized_state = state;
1048         } else if (streq(key, "failure")) {
1049                 int b;
1050
1051                 if ((b = parse_boolean(value)) < 0)
1052                         log_debug("Failed to parse failure value %s", value);
1053                 else
1054                         m->failure = b || m->failure;
1055
1056         } else if (streq(key, "control-pid")) {
1057                 pid_t pid;
1058
1059                 if (parse_pid(value, &pid) < 0)
1060                         log_debug("Failed to parse control-pid value %s", value);
1061                 else
1062                         m->control_pid = pid;
1063         } else if (streq(key, "control-command")) {
1064                 MountExecCommand id;
1065
1066                 if ((id = mount_exec_command_from_string(value)) < 0)
1067                         log_debug("Failed to parse exec-command value %s", value);
1068                 else {
1069                         m->control_command_id = id;
1070                         m->control_command = m->exec_command + id;
1071                 }
1072
1073         } else
1074                 log_debug("Unknown serialization key '%s'", key);
1075
1076         return 0;
1077 }
1078
1079 static UnitActiveState mount_active_state(Unit *u) {
1080         assert(u);
1081
1082         return state_translation_table[MOUNT(u)->state];
1083 }
1084
1085 static const char *mount_sub_state_to_string(Unit *u) {
1086         assert(u);
1087
1088         return mount_state_to_string(MOUNT(u)->state);
1089 }
1090
1091 static bool mount_check_gc(Unit *u) {
1092         Mount *m = MOUNT(u);
1093
1094         assert(m);
1095
1096         return m->from_etc_fstab || m->from_proc_self_mountinfo;
1097 }
1098
1099 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1100         Mount *m = MOUNT(u);
1101         bool success;
1102
1103         assert(m);
1104         assert(pid >= 0);
1105
1106         if (pid != m->control_pid)
1107                 return;
1108
1109         m->control_pid = 0;
1110
1111         success = is_clean_exit(code, status);
1112         m->failure = m->failure || !success;
1113
1114         if (m->control_command) {
1115                 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1116                 m->control_command = NULL;
1117                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1118         }
1119
1120         log_full(success ? LOG_DEBUG : LOG_NOTICE,
1121                  "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1122
1123         /* Note that mount(8) returning and the kernel sending us a
1124          * mount table change event might happen out-of-order. If an
1125          * operation succeed we assume the kernel will follow soon too
1126          * and already change into the resulting state.  If it fails
1127          * we check if the kernel still knows about the mount. and
1128          * change state accordingly. */
1129
1130         switch (m->state) {
1131
1132         case MOUNT_MOUNTING:
1133         case MOUNT_MOUNTING_DONE:
1134         case MOUNT_MOUNTING_SIGKILL:
1135         case MOUNT_MOUNTING_SIGTERM:
1136
1137                 if (success)
1138                         mount_enter_mounted(m, true);
1139                 else if (m->from_proc_self_mountinfo)
1140                         mount_enter_mounted(m, false);
1141                 else
1142                         mount_enter_dead(m, false);
1143                 break;
1144
1145         case MOUNT_REMOUNTING:
1146         case MOUNT_REMOUNTING_SIGKILL:
1147         case MOUNT_REMOUNTING_SIGTERM:
1148
1149                 m->reload_failure = !success;
1150                 if (m->from_proc_self_mountinfo)
1151                         mount_enter_mounted(m, true);
1152                 else
1153                         mount_enter_dead(m, true);
1154
1155                 break;
1156
1157         case MOUNT_UNMOUNTING:
1158         case MOUNT_UNMOUNTING_SIGKILL:
1159         case MOUNT_UNMOUNTING_SIGTERM:
1160
1161                 if (success)
1162                         mount_enter_dead(m, true);
1163                 else if (m->from_proc_self_mountinfo)
1164                         mount_enter_mounted(m, false);
1165                 else
1166                         mount_enter_dead(m, false);
1167                 break;
1168
1169         default:
1170                 assert_not_reached("Uh, control process died at wrong time.");
1171         }
1172
1173         /* Notify clients about changed exit status */
1174         unit_add_to_dbus_queue(u);
1175 }
1176
1177 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1178         Mount *m = MOUNT(u);
1179
1180         assert(m);
1181         assert(elapsed == 1);
1182         assert(w == &m->timer_watch);
1183
1184         switch (m->state) {
1185
1186         case MOUNT_MOUNTING:
1187         case MOUNT_MOUNTING_DONE:
1188                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1189                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1190                 break;
1191
1192         case MOUNT_REMOUNTING:
1193                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1194                 m->reload_failure = true;
1195                 mount_enter_mounted(m, true);
1196                 break;
1197
1198         case MOUNT_UNMOUNTING:
1199                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1200                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1201                 break;
1202
1203         case MOUNT_MOUNTING_SIGTERM:
1204                 if (m->exec_context.send_sigkill) {
1205                         log_warning("%s mounting timed out. Killing.", u->meta.id);
1206                         mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1207                 } else {
1208                         log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1209
1210                         if (m->from_proc_self_mountinfo)
1211                                 mount_enter_mounted(m, false);
1212                         else
1213                                 mount_enter_dead(m, false);
1214                 }
1215                 break;
1216
1217         case MOUNT_REMOUNTING_SIGTERM:
1218                 if (m->exec_context.send_sigkill) {
1219                         log_warning("%s remounting timed out. Killing.", u->meta.id);
1220                         mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1221                 } else {
1222                         log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1223
1224                         if (m->from_proc_self_mountinfo)
1225                                 mount_enter_mounted(m, false);
1226                         else
1227                                 mount_enter_dead(m, false);
1228                 }
1229                 break;
1230
1231         case MOUNT_UNMOUNTING_SIGTERM:
1232                 if (m->exec_context.send_sigkill) {
1233                         log_warning("%s unmounting timed out. Killing.", u->meta.id);
1234                         mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1235                 } else {
1236                         log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1237
1238                         if (m->from_proc_self_mountinfo)
1239                                 mount_enter_mounted(m, false);
1240                         else
1241                                 mount_enter_dead(m, false);
1242                 }
1243                 break;
1244
1245         case MOUNT_MOUNTING_SIGKILL:
1246         case MOUNT_REMOUNTING_SIGKILL:
1247         case MOUNT_UNMOUNTING_SIGKILL:
1248                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1249
1250                 if (m->from_proc_self_mountinfo)
1251                         mount_enter_mounted(m, false);
1252                 else
1253                         mount_enter_dead(m, false);
1254                 break;
1255
1256         default:
1257                 assert_not_reached("Timeout at wrong time.");
1258         }
1259 }
1260
1261 static int mount_add_one(
1262                 Manager *m,
1263                 const char *what,
1264                 const char *where,
1265                 const char *options,
1266                 const char *fstype,
1267                 int passno,
1268                 bool from_proc_self_mountinfo,
1269                 bool set_flags) {
1270         int r;
1271         Unit *u;
1272         bool delete;
1273         char *e, *w = NULL, *o = NULL, *f = NULL;
1274         MountParameters *p;
1275
1276         assert(m);
1277         assert(what);
1278         assert(where);
1279         assert(options);
1280         assert(fstype);
1281
1282         assert(!set_flags || from_proc_self_mountinfo);
1283
1284         /* Ignore API mount points. They should never be referenced in
1285          * dependencies ever. */
1286         if (mount_point_is_api(where))
1287                 return 0;
1288         if (mount_point_ignore(where))
1289                 return 0;
1290
1291         if (streq(fstype, "autofs"))
1292                 return 0;
1293
1294         /* probably some kind of swap, ignore */
1295         if (!is_path(where))
1296                 return 0;
1297
1298         if (!(e = unit_name_from_path(where, ".mount")))
1299                 return -ENOMEM;
1300
1301         if (!(u = manager_get_unit(m, e))) {
1302                 delete = true;
1303
1304                 if (!(u = unit_new(m))) {
1305                         free(e);
1306                         return -ENOMEM;
1307                 }
1308
1309                 r = unit_add_name(u, e);
1310                 free(e);
1311
1312                 if (r < 0)
1313                         goto fail;
1314
1315                 if (!(MOUNT(u)->where = strdup(where))) {
1316                         r = -ENOMEM;
1317                         goto fail;
1318                 }
1319
1320                 unit_add_to_load_queue(u);
1321         } else {
1322                 delete = false;
1323                 free(e);
1324         }
1325
1326         if (!(w = strdup(what)) ||
1327             !(o = strdup(options)) ||
1328             !(f = strdup(fstype))) {
1329                 r = -ENOMEM;
1330                 goto fail;
1331         }
1332
1333         if (from_proc_self_mountinfo) {
1334                 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1335
1336                 if (set_flags) {
1337                         MOUNT(u)->is_mounted = true;
1338                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1339                         MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1340                 }
1341
1342                 MOUNT(u)->from_proc_self_mountinfo = true;
1343         } else {
1344                 p = &MOUNT(u)->parameters_etc_fstab;
1345                 MOUNT(u)->from_etc_fstab = true;
1346         }
1347
1348         free(p->what);
1349         p->what = w;
1350
1351         free(p->options);
1352         p->options = o;
1353
1354         free(p->fstype);
1355         p->fstype = f;
1356
1357         p->passno = passno;
1358
1359         unit_add_to_dbus_queue(u);
1360
1361         return 0;
1362
1363 fail:
1364         free(w);
1365         free(o);
1366         free(f);
1367
1368         if (delete && u)
1369                 unit_free(u);
1370
1371         return r;
1372 }
1373
1374 static int mount_find_pri(char *options) {
1375         char *end, *pri;
1376         unsigned long r;
1377
1378         if (!(pri = mount_test_option(options, "pri=")))
1379                 return 0;
1380
1381         pri += 4;
1382
1383         errno = 0;
1384         r = strtoul(pri, &end, 10);
1385
1386         if (errno != 0)
1387                 return -errno;
1388
1389         if (end == pri || (*end != ',' && *end != 0))
1390                 return -EINVAL;
1391
1392         return (int) r;
1393 }
1394
1395 static int mount_load_etc_fstab(Manager *m) {
1396         FILE *f;
1397         int r = 0;
1398         struct mntent* me;
1399
1400         assert(m);
1401
1402         errno = 0;
1403         if (!(f = setmntent("/etc/fstab", "r")))
1404                 return -errno;
1405
1406         while ((me = getmntent(f))) {
1407                 char *where, *what;
1408                 int k;
1409
1410                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1411                         r = -ENOMEM;
1412                         goto finish;
1413                 }
1414
1415                 if (!(where = strdup(me->mnt_dir))) {
1416                         free(what);
1417                         r = -ENOMEM;
1418                         goto finish;
1419                 }
1420
1421                 if (what[0] == '/')
1422                         path_kill_slashes(what);
1423
1424                 if (where[0] == '/')
1425                         path_kill_slashes(where);
1426
1427                 if (streq(me->mnt_type, "swap")) {
1428                         int pri;
1429
1430                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1431                                 k = pri;
1432                         else
1433                                 k = swap_add_one(m,
1434                                                  what,
1435                                                  NULL,
1436                                                  pri,
1437                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1438                                                  !!mount_test_option(me->mnt_opts, "nofail"),
1439                                                  !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1440                                                  false);
1441                 } else
1442                         k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1443
1444                 free(what);
1445                 free(where);
1446
1447                 if (r < 0)
1448                         r = k;
1449         }
1450
1451 finish:
1452
1453         endmntent(f);
1454         return r;
1455 }
1456
1457 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1458         int r = 0;
1459         unsigned i;
1460         char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1461
1462         assert(m);
1463
1464         rewind(m->proc_self_mountinfo);
1465
1466         for (i = 1;; i++) {
1467                 int k;
1468
1469                 device = path = options = options2 = fstype = d = p = o = NULL;
1470
1471                 if ((k = fscanf(m->proc_self_mountinfo,
1472                                 "%*s "       /* (1) mount id */
1473                                 "%*s "       /* (2) parent id */
1474                                 "%*s "       /* (3) major:minor */
1475                                 "%*s "       /* (4) root */
1476                                 "%ms "       /* (5) mount point */
1477                                 "%ms"        /* (6) mount options */
1478                                 "%*[^-]"     /* (7) optional fields */
1479                                 "- "         /* (8) separator */
1480                                 "%ms "       /* (9) file system type */
1481                                 "%ms"        /* (10) mount source */
1482                                 "%ms"        /* (11) mount options 2 */
1483                                 "%*[^\n]",   /* some rubbish at the end */
1484                                 &path,
1485                                 &options,
1486                                 &fstype,
1487                                 &device,
1488                                 &options2)) != 5) {
1489
1490                         if (k == EOF)
1491                                 break;
1492
1493                         log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1494                         goto clean_up;
1495                 }
1496
1497                 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1498                         r = -ENOMEM;
1499                         goto finish;
1500                 }
1501
1502                 if (!(d = cunescape(device)) ||
1503                     !(p = cunescape(path))) {
1504                         r = -ENOMEM;
1505                         goto finish;
1506                 }
1507
1508                 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1509                         r = k;
1510
1511 clean_up:
1512                 free(device);
1513                 free(path);
1514                 free(options);
1515                 free(options2);
1516                 free(fstype);
1517                 free(d);
1518                 free(p);
1519                 free(o);
1520         }
1521
1522 finish:
1523         free(device);
1524         free(path);
1525         free(options);
1526         free(options2);
1527         free(fstype);
1528         free(d);
1529         free(p);
1530         free(o);
1531
1532         return r;
1533 }
1534
1535 static void mount_shutdown(Manager *m) {
1536         assert(m);
1537
1538         if (m->proc_self_mountinfo) {
1539                 fclose(m->proc_self_mountinfo);
1540                 m->proc_self_mountinfo = NULL;
1541         }
1542 }
1543
1544 static int mount_enumerate(Manager *m) {
1545         int r;
1546         struct epoll_event ev;
1547         assert(m);
1548
1549         if (!m->proc_self_mountinfo) {
1550                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1551                         return -errno;
1552
1553                 m->mount_watch.type = WATCH_MOUNT;
1554                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1555
1556                 zero(ev);
1557                 ev.events = EPOLLPRI;
1558                 ev.data.ptr = &m->mount_watch;
1559
1560                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1561                         return -errno;
1562         }
1563
1564         if ((r = mount_load_etc_fstab(m)) < 0)
1565                 goto fail;
1566
1567         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1568                 goto fail;
1569
1570         return 0;
1571
1572 fail:
1573         mount_shutdown(m);
1574         return r;
1575 }
1576
1577 void mount_fd_event(Manager *m, int events) {
1578         Meta *meta;
1579         int r;
1580
1581         assert(m);
1582         assert(events & EPOLLPRI);
1583
1584         /* The manager calls this for every fd event happening on the
1585          * /proc/self/mountinfo file, which informs us about mounting
1586          * table changes */
1587
1588         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1589                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1590
1591                 /* Reset flags, just in case, for later calls */
1592                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1593                         Mount *mount = (Mount*) meta;
1594
1595                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1596                 }
1597
1598                 return;
1599         }
1600
1601         manager_dispatch_load_queue(m);
1602
1603         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1604                 Mount *mount = (Mount*) meta;
1605
1606                 if (!mount->is_mounted) {
1607                         /* This has just been unmounted. */
1608
1609                         mount->from_proc_self_mountinfo = false;
1610
1611                         switch (mount->state) {
1612
1613                         case MOUNT_MOUNTED:
1614                                 mount_enter_dead(mount, true);
1615                                 break;
1616
1617                         default:
1618                                 mount_set_state(mount, mount->state);
1619                                 break;
1620
1621                         }
1622
1623                 } else if (mount->just_mounted || mount->just_changed) {
1624
1625                         /* New or changed mount entry */
1626
1627                         switch (mount->state) {
1628
1629                         case MOUNT_DEAD:
1630                         case MOUNT_FAILED:
1631                                 mount_enter_mounted(mount, true);
1632                                 break;
1633
1634                         case MOUNT_MOUNTING:
1635                                 mount_enter_mounting_done(mount);
1636                                 break;
1637
1638                         default:
1639                                 /* Nothing really changed, but let's
1640                                  * issue an notification call
1641                                  * nonetheless, in case somebody is
1642                                  * waiting for this. (e.g. file system
1643                                  * ro/rw remounts.) */
1644                                 mount_set_state(mount, mount->state);
1645                                 break;
1646                         }
1647                 }
1648
1649                 /* Reset the flags for later calls */
1650                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1651         }
1652 }
1653
1654 static void mount_reset_failed(Unit *u) {
1655         Mount *m = MOUNT(u);
1656
1657         assert(m);
1658
1659         if (m->state == MOUNT_FAILED)
1660                 mount_set_state(m, MOUNT_DEAD);
1661
1662         m->failure = false;
1663 }
1664
1665 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1666         Mount *m = MOUNT(u);
1667         int r = 0;
1668         Set *pid_set = NULL;
1669
1670         assert(m);
1671
1672         if (who == KILL_MAIN) {
1673                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1674                 return -EINVAL;
1675         }
1676
1677         if (m->control_pid <= 0 && who == KILL_CONTROL) {
1678                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1679                 return -ENOENT;
1680         }
1681
1682         if (m->control_pid > 0)
1683                 if (kill(mode == KILL_PROCESS_GROUP ? -m->control_pid : m->control_pid, signo) < 0)
1684                         r = -errno;
1685
1686         if (mode == KILL_CONTROL_GROUP) {
1687                 int q;
1688
1689                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1690                         return -ENOMEM;
1691
1692                 /* Exclude the control pid from being killed via the cgroup */
1693                 if (m->control_pid > 0)
1694                         if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1695                                 r = q;
1696                                 goto finish;
1697                         }
1698
1699                 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1700                         if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1701                                 r = q;
1702         }
1703
1704 finish:
1705         if (pid_set)
1706                 set_free(pid_set);
1707
1708         return r;
1709 }
1710
1711 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1712         [MOUNT_DEAD] = "dead",
1713         [MOUNT_MOUNTING] = "mounting",
1714         [MOUNT_MOUNTING_DONE] = "mounting-done",
1715         [MOUNT_MOUNTED] = "mounted",
1716         [MOUNT_REMOUNTING] = "remounting",
1717         [MOUNT_UNMOUNTING] = "unmounting",
1718         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1719         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1720         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1721         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1722         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1723         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1724         [MOUNT_FAILED] = "failed"
1725 };
1726
1727 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1728
1729 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1730         [MOUNT_EXEC_MOUNT] = "ExecMount",
1731         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1732         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1733 };
1734
1735 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1736
1737 const UnitVTable mount_vtable = {
1738         .suffix = ".mount",
1739
1740         .no_alias = true,
1741         .no_instances = true,
1742         .no_isolate = true,
1743         .show_status = true,
1744
1745         .init = mount_init,
1746         .load = mount_load,
1747         .done = mount_done,
1748
1749         .coldplug = mount_coldplug,
1750
1751         .dump = mount_dump,
1752
1753         .start = mount_start,
1754         .stop = mount_stop,
1755         .reload = mount_reload,
1756
1757         .kill = mount_kill,
1758
1759         .serialize = mount_serialize,
1760         .deserialize_item = mount_deserialize_item,
1761
1762         .active_state = mount_active_state,
1763         .sub_state_to_string = mount_sub_state_to_string,
1764
1765         .check_gc = mount_check_gc,
1766
1767         .sigchld_event = mount_sigchld_event,
1768         .timer_event = mount_timer_event,
1769
1770         .reset_failed = mount_reset_failed,
1771
1772         .bus_interface = "org.freedesktop.systemd1.Mount",
1773         .bus_message_handler = bus_mount_message_handler,
1774         .bus_invalidating_properties =  bus_mount_invalidating_properties,
1775
1776         .enumerate = mount_enumerate,
1777         .shutdown = mount_shutdown
1778 };