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
  41 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
  42         [MOUNT_DEAD] = UNIT_INACTIVE,
  43         [MOUNT_MOUNTING] = UNIT_ACTIVATING,
  44         [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
  45         [MOUNT_MOUNTED] = UNIT_ACTIVE,
  46         [MOUNT_REMOUNTING] = UNIT_RELOADING,
  47         [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
  48         [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  49         [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  50         [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
  51         [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
  52         [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  53         [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  54         [MOUNT_FAILED] = UNIT_FAILED
  55 };
  56
  57 static void mount_init(Unit *u) {
  58         Mount *m = MOUNT(u);
  59
  60         assert(u);
  61         assert(u->meta.load_state == UNIT_STUB);
  62
  63         m->timeout_usec = DEFAULT_TIMEOUT_USEC;
  64         m->directory_mode = 0755;
  65
  66         exec_context_init(&m->exec_context);
  67
  68         /* We need to make sure that /bin/mount is always called in
  69          * the same process group as us, so that the autofs kernel
  70          * side doesn't send us another mount request while we are
  71          * already trying to comply its last one. */
  72         m->exec_context.same_pgrp = true;
  73
  74         m->timer_watch.type = WATCH_INVALID;
  75
  76         m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
  77 }
  78
  79 static void mount_unwatch_control_pid(Mount *m) {
  80         assert(m);
  81
  82         if (m->control_pid <= 0)
  83                 return;
  84
  85         unit_unwatch_pid(UNIT(m), m->control_pid);
  86         m->control_pid = 0;
  87 }
  88
  89 static void mount_parameters_done(MountParameters *p) {
  90         assert(p);
  91
  92         free(p->what);
  93         free(p->options);
  94         free(p->fstype);
  95
  96         p->what = p->options = p->fstype = NULL;
  97 }
  98
  99 static void mount_done(Unit *u) {
 100         Mount *m = MOUNT(u);
 101         Meta *other;
 102
 103         assert(m);
 104
 105         free(m->where);
 106         m->where = NULL;
 107
 108         /* Try to detach us from the automount unit if there is any */
 109         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT]) {
 110                 Automount *a = (Automount*) other;
 111
 112                 if (a->mount == m)
 113                         a->mount = NULL;
 114         }
 115
 116         mount_parameters_done(&m->parameters_etc_fstab);
 117         mount_parameters_done(&m->parameters_proc_self_mountinfo);
 118         mount_parameters_done(&m->parameters_fragment);
 119
 120         exec_context_done(&m->exec_context);
 121         exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
 122         m->control_command = NULL;
 123
 124         mount_unwatch_control_pid(m);
 125
 126         unit_unwatch_timer(u, &m->timer_watch);
 127 }
 128
 129 static int mount_add_mount_links(Mount *m) {
 130         Meta *other;
 131         int r;
 132         MountParameters *pm;
 133
 134         assert(m);
 135
 136         if (m->from_fragment)
 137                 pm = &m->parameters_fragment;
 138         else if (m->from_etc_fstab)
 139                 pm = &m->parameters_etc_fstab;
 140         else
 141                 pm = NULL;
 142
 143         /* Adds in links to other mount points that might lie below or
 144          * above us in the hierarchy */
 145
 146         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
 147                 Mount *n = (Mount*) other;
 148                 MountParameters *pn;
 149
 150                 if (n == m)
 151                         continue;
 152
 153                 if (n->meta.load_state != UNIT_LOADED)
 154                         continue;
 155
 156                 if (n->from_fragment)
 157                         pn = &n->parameters_fragment;
 158                 else if (n->from_etc_fstab)
 159                         pn = &n->parameters_etc_fstab;
 160                 else
 161                         pn = NULL;
 162
 163                 if (path_startswith(m->where, n->where)) {
 164
 165                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 166                                 return r;
 167
 168                         if (n->from_etc_fstab || n->from_fragment)
 169                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 170                                         return r;
 171
 172                 } else if (path_startswith(n->where, m->where)) {
 173
 174                         if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
 175                                 return r;
 176
 177                         if (m->from_etc_fstab || m->from_fragment)
 178                                 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 179                                         return r;
 180
 181                 } else if (pm && path_startswith(pm->what, n->where)) {
 182
 183                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 184                                 return r;
 185
 186                         if (m->from_etc_fstab || m->from_fragment)
 187                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 188                                         return r;
 189
 190                 } else if (pn && path_startswith(pn->what, m->where)) {
 191
 192                         if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
 193                                 return r;
 194
 195                         if (n->from_etc_fstab || n->from_fragment)
 196                                 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 197                                         return r;
 198                 }
 199         }
 200
 201         return 0;
 202 }
 203
 204 static int mount_add_swap_links(Mount *m) {
 205         Meta *other;
 206         int r;
 207
 208         assert(m);
 209
 210         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
 211                 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
 212                         return r;
 213
 214         return 0;
 215 }
 216
 217 static int mount_add_path_links(Mount *m) {
 218         Meta *other;
 219         int r;
 220
 221         assert(m);
 222
 223         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
 224                 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
 225                         return r;
 226
 227         return 0;
 228 }
 229
 230 static int mount_add_automount_links(Mount *m) {
 231         Meta *other;
 232         int r;
 233
 234         assert(m);
 235
 236         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
 237                 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
 238                         return r;
 239
 240         return 0;
 241 }
 242
 243 static int mount_add_socket_links(Mount *m) {
 244         Meta *other;
 245         int r;
 246
 247         assert(m);
 248
 249         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
 250                 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
 251                         return r;
 252
 253         return 0;
 254 }
 255
 256 static char* mount_test_option(const char *haystack, const char *needle) {
 257         struct mntent me;
 258
 259         assert(needle);
 260
 261         /* Like glibc's hasmntopt(), but works on a string, not a
 262          * struct mntent */
 263
 264         if (!haystack)
 265                 return false;
 266
 267         zero(me);
 268         me.mnt_opts = (char*) haystack;
 269
 270         return hasmntopt(&me, needle);
 271 }
 272
 273 static int mount_add_target_links(Mount *m) {
 274         const char *target, *after = NULL;
 275         MountParameters *p;
 276         Unit *tu;
 277         int r;
 278         bool noauto, nofail, handle, automount;
 279
 280         assert(m);
 281
 282         if (m->from_fragment)
 283                 p = &m->parameters_fragment;
 284         else if (m->from_etc_fstab)
 285                 p = &m->parameters_etc_fstab;
 286         else
 287                 return 0;
 288
 289         noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 290         nofail = !!mount_test_option(p->options, "nofail");
 291         handle = !!mount_test_option(p->options, "comment=systemd.mount") ||
 292                 m->meta.manager->mount_auto;
 293         automount = !!mount_test_option(p->options, "comment=systemd.automount");
 294
 295         if (mount_test_option(p->options, "_netdev") ||
 296             (p->fstype && fstype_is_network(p->fstype))) {
 297                 target = SPECIAL_REMOTE_FS_TARGET;
 298
 299                 if (m->meta.manager->running_as == MANAGER_SYSTEM)
 300                         after = SPECIAL_NETWORK_TARGET;
 301         } else
 302                 target = SPECIAL_LOCAL_FS_TARGET;
 303
 304         if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
 305                 return r;
 306
 307         if (after)
 308                 if ((r = unit_add_dependency_by_name(tu, UNIT_AFTER, after, NULL, true)) < 0)
 309                         return r;
 310
 311         if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
 312                 Unit *am;
 313
 314                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
 315                         return r;
 316
 317                 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
 318         } else {
 319
 320                 /* Automatically add mount points that aren't natively
 321                  * configured to local-fs.target */
 322                 if (!noauto &&
 323                     !nofail &&
 324                     handle &&
 325                     m->from_etc_fstab &&
 326                     m->meta.manager->running_as == MANAGER_SYSTEM)
 327                         if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
 328                                 return r;
 329
 330                 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
 331         }
 332 }
 333
 334 static bool mount_is_bind(MountParameters *p) {
 335         assert(p);
 336
 337         if (p->fstype && streq(p->fstype, "bind"))
 338                 return true;
 339
 340         if (mount_test_option(p->options, "bind"))
 341                 return true;
 342
 343         return false;
 344 }
 345
 346 static int mount_add_device_links(Mount *m) {
 347         MountParameters *p;
 348         int r;
 349
 350         assert(m);
 351
 352         if (m->from_fragment)
 353                 p = &m->parameters_fragment;
 354         else if (m->from_etc_fstab)
 355                 p = &m->parameters_etc_fstab;
 356         else
 357                 return 0;
 358
 359         if (!p->what)
 360                 return 0;
 361
 362         if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
 363                 bool nofail, noauto;
 364
 365                 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 366                 nofail = !!mount_test_option(p->options, "nofail");
 367
 368                 if ((r = unit_add_node_link(UNIT(m), p->what,
 369                                             !noauto && nofail &&
 370                                             UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
 371                         return r;
 372         }
 373
 374         if (p->passno > 0 &&
 375             UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
 376             !path_equal(m->where, "/")) {
 377                 char *name;
 378                 Unit *fsck;
 379                 /* Let's add in the fsck service */
 380
 381                 /* aka SPECIAL_FSCK_SERVICE */
 382                 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
 383                         return -ENOMEM;
 384
 385                 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
 386                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
 387                         free(name);
 388                         return r;
 389                 }
 390
 391                 free(name);
 392
 393                 SERVICE(fsck)->fsck_passno = p->passno;
 394
 395                 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
 396                         return r;
 397         }
 398
 399         return 0;
 400 }
 401
 402 static int mount_add_default_dependencies(Mount *m) {
 403         int r;
 404
 405         assert(m);
 406
 407         if (m->meta.manager->running_as == MANAGER_SYSTEM &&
 408             !path_equal(m->where, "/")) {
 409
 410                 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_BEFORE, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0)
 411                         return r;
 412
 413                 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
 414                         return r;
 415         }
 416
 417         return 0;
 418 }
 419
 420 static int mount_verify(Mount *m) {
 421         bool b;
 422         char *e;
 423         assert(m);
 424
 425         if (m->meta.load_state != UNIT_LOADED)
 426                 return 0;
 427
 428         if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
 429                 return -ENOENT;
 430
 431         if (!(e = unit_name_from_path(m->where, ".mount")))
 432                 return -ENOMEM;
 433
 434         b = unit_has_name(UNIT(m), e);
 435         free(e);
 436
 437         if (!b) {
 438                 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
 439                 return -EINVAL;
 440         }
 441
 442         if (m->meta.fragment_path && !m->parameters_fragment.what) {
 443                 log_error("%s's What setting is missing. Refusing.", m->meta.id);
 444                 return -EBADMSG;
 445         }
 446
 447         if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 448                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
 449                 return -EINVAL;
 450         }
 451
 452         return 0;
 453 }
 454
 455 static int mount_load(Unit *u) {
 456         Mount *m = MOUNT(u);
 457         int r;
 458
 459         assert(u);
 460         assert(u->meta.load_state == UNIT_STUB);
 461
 462         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
 463                 return r;
 464
 465         /* This is a new unit? Then let's add in some extras */
 466         if (u->meta.load_state == UNIT_LOADED) {
 467                 if (m->meta.fragment_path)
 468                         m->from_fragment = true;
 469
 470                 if (!m->where)
 471                         if (!(m->where = unit_name_to_path(u->meta.id)))
 472                                 return -ENOMEM;
 473
 474                 path_kill_slashes(m->where);
 475
 476                 if (!m->meta.description)
 477                         if ((r = unit_set_description(u, m->where)) < 0)
 478                                 return r;
 479
 480                 if ((r = mount_add_device_links(m)) < 0)
 481                         return r;
 482
 483                 if ((r = mount_add_mount_links(m)) < 0)
 484                         return r;
 485
 486                 if ((r = mount_add_socket_links(m)) < 0)
 487                         return r;
 488
 489                 if ((r = mount_add_swap_links(m)) < 0)
 490                         return r;
 491
 492                 if ((r = mount_add_path_links(m)) < 0)
 493                         return r;
 494
 495                 if ((r = mount_add_automount_links(m)) < 0)
 496                         return r;
 497
 498                 if ((r = mount_add_target_links(m)) < 0)
 499                         return r;
 500
 501                 if ((r = unit_add_default_cgroups(u)) < 0)
 502                         return r;
 503
 504                 if (m->meta.default_dependencies)
 505                         if ((r = mount_add_default_dependencies(m)) < 0)
 506                                 return r;
 507         }
 508
 509         return mount_verify(m);
 510 }
 511
 512 static int mount_notify_automount(Mount *m, int status) {
 513         Unit *p;
 514         int r;
 515
 516         assert(m);
 517
 518         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
 519                 return r == -ENOENT ? 0 : r;
 520
 521         return automount_send_ready(AUTOMOUNT(p), status);
 522 }
 523
 524 static void mount_set_state(Mount *m, MountState state) {
 525         MountState old_state;
 526         assert(m);
 527
 528         old_state = m->state;
 529         m->state = state;
 530
 531         if (state != MOUNT_MOUNTING &&
 532             state != MOUNT_MOUNTING_DONE &&
 533             state != MOUNT_REMOUNTING &&
 534             state != MOUNT_UNMOUNTING &&
 535             state != MOUNT_MOUNTING_SIGTERM &&
 536             state != MOUNT_MOUNTING_SIGKILL &&
 537             state != MOUNT_UNMOUNTING_SIGTERM &&
 538             state != MOUNT_UNMOUNTING_SIGKILL &&
 539             state != MOUNT_REMOUNTING_SIGTERM &&
 540             state != MOUNT_REMOUNTING_SIGKILL) {
 541                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
 542                 mount_unwatch_control_pid(m);
 543                 m->control_command = NULL;
 544                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 545         }
 546
 547         if (state == MOUNT_MOUNTED ||
 548             state == MOUNT_REMOUNTING)
 549                 mount_notify_automount(m, 0);
 550         else if (state == MOUNT_DEAD ||
 551                  state == MOUNT_UNMOUNTING ||
 552                  state == MOUNT_MOUNTING_SIGTERM ||
 553                  state == MOUNT_MOUNTING_SIGKILL ||
 554                  state == MOUNT_REMOUNTING_SIGTERM ||
 555                  state == MOUNT_REMOUNTING_SIGKILL ||
 556                  state == MOUNT_UNMOUNTING_SIGTERM ||
 557                  state == MOUNT_UNMOUNTING_SIGKILL ||
 558                  state == MOUNT_FAILED)
 559                 mount_notify_automount(m, -ENODEV);
 560
 561         if (state != old_state)
 562                 log_debug("%s changed %s -> %s",
 563                           m->meta.id,
 564                           mount_state_to_string(old_state),
 565                           mount_state_to_string(state));
 566
 567         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
 568         m->reload_failure = false;
 569 }
 570
 571 static int mount_coldplug(Unit *u) {
 572         Mount *m = MOUNT(u);
 573         MountState new_state = MOUNT_DEAD;
 574         int r;
 575
 576         assert(m);
 577         assert(m->state == MOUNT_DEAD);
 578
 579         if (m->deserialized_state != m->state)
 580                 new_state = m->deserialized_state;
 581         else if (m->from_proc_self_mountinfo)
 582                 new_state = MOUNT_MOUNTED;
 583
 584         if (new_state != m->state) {
 585
 586                 if (new_state == MOUNT_MOUNTING ||
 587                     new_state == MOUNT_MOUNTING_DONE ||
 588                     new_state == MOUNT_REMOUNTING ||
 589                     new_state == MOUNT_UNMOUNTING ||
 590                     new_state == MOUNT_MOUNTING_SIGTERM ||
 591                     new_state == MOUNT_MOUNTING_SIGKILL ||
 592                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
 593                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
 594                     new_state == MOUNT_REMOUNTING_SIGTERM ||
 595                     new_state == MOUNT_REMOUNTING_SIGKILL) {
 596
 597                         if (m->control_pid <= 0)
 598                                 return -EBADMSG;
 599
 600                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
 601                                 return r;
 602
 603                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 604                                 return r;
 605                 }
 606
 607                 mount_set_state(m, new_state);
 608         }
 609
 610         return 0;
 611 }
 612
 613 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
 614         Mount *m = MOUNT(u);
 615         MountParameters *p;
 616
 617         assert(m);
 618         assert(f);
 619
 620         if (m->from_proc_self_mountinfo)
 621                 p = &m->parameters_proc_self_mountinfo;
 622         else if (m->from_fragment)
 623                 p = &m->parameters_fragment;
 624         else
 625                 p = &m->parameters_etc_fstab;
 626
 627         fprintf(f,
 628                 "%sMount State: %s\n"
 629                 "%sWhere: %s\n"
 630                 "%sWhat: %s\n"
 631                 "%sFile System Type: %s\n"
 632                 "%sOptions: %s\n"
 633                 "%sFrom /etc/fstab: %s\n"
 634                 "%sFrom /proc/self/mountinfo: %s\n"
 635                 "%sFrom fragment: %s\n"
 636                 "%sDirectoryMode: %04o\n",
 637                 prefix, mount_state_to_string(m->state),
 638                 prefix, m->where,
 639                 prefix, strna(p->what),
 640                 prefix, strna(p->fstype),
 641                 prefix, strna(p->options),
 642                 prefix, yes_no(m->from_etc_fstab),
 643                 prefix, yes_no(m->from_proc_self_mountinfo),
 644                 prefix, yes_no(m->from_fragment),
 645                 prefix, m->directory_mode);
 646
 647         if (m->control_pid > 0)
 648                 fprintf(f,
 649                         "%sControl PID: %lu\n",
 650                         prefix, (unsigned long) m->control_pid);
 651
 652         exec_context_dump(&m->exec_context, f, prefix);
 653 }
 654
 655 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 656         pid_t pid;
 657         int r;
 658
 659         assert(m);
 660         assert(c);
 661         assert(_pid);
 662
 663         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 664                 goto fail;
 665
 666         if ((r = exec_spawn(c,
 667                             NULL,
 668                             &m->exec_context,
 669                             NULL, 0,
 670                             m->meta.manager->environment,
 671                             true,
 672                             true,
 673                             true,
 674                             m->meta.manager->confirm_spawn,
 675                             m->meta.cgroup_bondings,
 676                             &pid)) < 0)
 677                 goto fail;
 678
 679         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 680                 /* FIXME: we need to do something here */
 681                 goto fail;
 682
 683         *_pid = pid;
 684
 685         return 0;
 686
 687 fail:
 688         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 689
 690         return r;
 691 }
 692
 693 static void mount_enter_dead(Mount *m, bool success) {
 694         assert(m);
 695
 696         if (!success)
 697                 m->failure = true;
 698
 699         mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
 700 }
 701
 702 static void mount_enter_mounted(Mount *m, bool success) {
 703         assert(m);
 704
 705         if (!success)
 706                 m->failure = true;
 707
 708         mount_set_state(m, MOUNT_MOUNTED);
 709 }
 710
 711 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 712         int r;
 713         Set *pid_set = NULL;
 714         bool wait_for_exit = false;
 715
 716         assert(m);
 717
 718         if (!success)
 719                 m->failure = true;
 720
 721         if (m->exec_context.kill_mode != KILL_NONE) {
 722                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 723                            state == MOUNT_UNMOUNTING_SIGTERM ||
 724                            state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
 725
 726                 if (m->control_pid > 0) {
 727                         if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
 728                                  -m->control_pid :
 729                                  m->control_pid, sig) < 0 && errno != ESRCH)
 730
 731                                 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
 732                         else
 733                                 wait_for_exit = true;
 734                 }
 735
 736                 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
 737
 738                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
 739                                 r = -ENOMEM;
 740                                 goto fail;
 741                         }
 742
 743                         /* Exclude the control pid from being killed via the cgroup */
 744                         if (m->control_pid > 0)
 745                                 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
 746                                         goto fail;
 747
 748                         if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
 749                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
 750                                         log_warning("Failed to kill control group: %s", strerror(-r));
 751                         } else if (r > 0)
 752                                 wait_for_exit = true;
 753
 754                         set_free(pid_set);
 755                 }
 756         }
 757
 758         if (wait_for_exit) {
 759                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 760                         goto fail;
 761
 762                 mount_set_state(m, state);
 763         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 764                 mount_enter_mounted(m, true);
 765         else
 766                 mount_enter_dead(m, true);
 767
 768         return;
 769
 770 fail:
 771         log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
 772
 773         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 774                 mount_enter_mounted(m, false);
 775         else
 776                 mount_enter_dead(m, false);
 777
 778         if (pid_set)
 779                 set_free(pid_set);
 780 }
 781
 782 static void mount_enter_unmounting(Mount *m, bool success) {
 783         int r;
 784
 785         assert(m);
 786
 787         if (!success)
 788                 m->failure = true;
 789
 790         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 791         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 792
 793         if ((r = exec_command_set(
 794                              m->control_command,
 795                              "/bin/umount",
 796                              m->where,
 797                              NULL)) < 0)
 798                 goto fail;
 799
 800         mount_unwatch_control_pid(m);
 801
 802         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 803                 goto fail;
 804
 805         mount_set_state(m, MOUNT_UNMOUNTING);
 806
 807         return;
 808
 809 fail:
 810         log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
 811         mount_enter_mounted(m, false);
 812 }
 813
 814 static void mount_enter_mounting(Mount *m) {
 815         int r;
 816
 817         assert(m);
 818
 819         m->control_command_id = MOUNT_EXEC_MOUNT;
 820         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 821
 822         mkdir_p(m->where, m->directory_mode);
 823
 824         if (m->from_fragment)
 825                 r = exec_command_set(
 826                                 m->control_command,
 827                                 "/bin/mount",
 828                                 m->parameters_fragment.what,
 829                                 m->where,
 830                                 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
 831                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 832                                 NULL);
 833         else if (m->from_etc_fstab)
 834                 r = exec_command_set(
 835                                 m->control_command,
 836                                 "/bin/mount",
 837                                 m->where,
 838                                 NULL);
 839         else
 840                 r = -ENOENT;
 841
 842         if (r < 0)
 843                 goto fail;
 844
 845         mount_unwatch_control_pid(m);
 846
 847         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 848                 goto fail;
 849
 850         mount_set_state(m, MOUNT_MOUNTING);
 851
 852         return;
 853
 854 fail:
 855         log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
 856         mount_enter_dead(m, false);
 857 }
 858
 859 static void mount_enter_mounting_done(Mount *m) {
 860         assert(m);
 861
 862         mount_set_state(m, MOUNT_MOUNTING_DONE);
 863 }
 864
 865 static void mount_enter_remounting(Mount *m, bool success) {
 866         int r;
 867
 868         assert(m);
 869
 870         if (!success)
 871                 m->failure = true;
 872
 873         m->control_command_id = MOUNT_EXEC_REMOUNT;
 874         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 875
 876         if (m->from_fragment) {
 877                 char *buf = NULL;
 878                 const char *o;
 879
 880                 if (m->parameters_fragment.options) {
 881                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 882                                 r = -ENOMEM;
 883                                 goto fail;
 884                         }
 885
 886                         o = buf;
 887                 } else
 888                         o = "remount";
 889
 890                 r = exec_command_set(
 891                                 m->control_command,
 892                                 "/bin/mount",
 893                                 m->parameters_fragment.what,
 894                                 m->where,
 895                                 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
 896                                 "-o", o,
 897                                 NULL);
 898
 899                 free(buf);
 900         } else if (m->from_etc_fstab)
 901                 r = exec_command_set(
 902                                 m->control_command,
 903                                 "/bin/mount",
 904                                 m->where,
 905                                 "-o", "remount",
 906                                 NULL);
 907         else
 908                 r = -ENOENT;
 909
 910         if (r < 0)
 911                 goto fail;
 912
 913         mount_unwatch_control_pid(m);
 914
 915         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 916                 goto fail;
 917
 918         mount_set_state(m, MOUNT_REMOUNTING);
 919
 920         return;
 921
 922 fail:
 923         log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
 924         m->reload_failure = true;
 925         mount_enter_mounted(m, true);
 926 }
 927
 928 static int mount_start(Unit *u) {
 929         Mount *m = MOUNT(u);
 930
 931         assert(m);
 932
 933         /* We cannot fulfill this request right now, try again later
 934          * please! */
 935         if (m->state == MOUNT_UNMOUNTING ||
 936             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 937             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 938             m->state == MOUNT_MOUNTING_SIGTERM ||
 939             m->state == MOUNT_MOUNTING_SIGKILL)
 940                 return -EAGAIN;
 941
 942         /* Already on it! */
 943         if (m->state == MOUNT_MOUNTING)
 944                 return 0;
 945
 946         assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
 947
 948         m->failure = false;
 949         mount_enter_mounting(m);
 950         return 0;
 951 }
 952
 953 static int mount_stop(Unit *u) {
 954         Mount *m = MOUNT(u);
 955
 956         assert(m);
 957
 958         /* Already on it */
 959         if (m->state == MOUNT_UNMOUNTING ||
 960             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 961             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 962             m->state == MOUNT_MOUNTING_SIGTERM ||
 963             m->state == MOUNT_MOUNTING_SIGKILL)
 964                 return 0;
 965
 966         assert(m->state == MOUNT_MOUNTING ||
 967                m->state == MOUNT_MOUNTING_DONE ||
 968                m->state == MOUNT_MOUNTED ||
 969                m->state == MOUNT_REMOUNTING ||
 970                m->state == MOUNT_REMOUNTING_SIGTERM ||
 971                m->state == MOUNT_REMOUNTING_SIGKILL);
 972
 973         mount_enter_unmounting(m, true);
 974         return 0;
 975 }
 976
 977 static int mount_reload(Unit *u) {
 978         Mount *m = MOUNT(u);
 979
 980         assert(m);
 981
 982         if (m->state == MOUNT_MOUNTING_DONE)
 983                 return -EAGAIN;
 984
 985         assert(m->state == MOUNT_MOUNTED);
 986
 987         mount_enter_remounting(m, true);
 988         return 0;
 989 }
 990
 991 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
 992         Mount *m = MOUNT(u);
 993
 994         assert(m);
 995         assert(f);
 996         assert(fds);
 997
 998         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
 999         unit_serialize_item(u, f, "failure", yes_no(m->failure));
1000
1001         if (m->control_pid > 0)
1002                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1003
1004         if (m->control_command_id >= 0)
1005                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1006
1007         return 0;
1008 }
1009
1010 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1011         Mount *m = MOUNT(u);
1012
1013         assert(u);
1014         assert(key);
1015         assert(value);
1016         assert(fds);
1017
1018         if (streq(key, "state")) {
1019                 MountState state;
1020
1021                 if ((state = mount_state_from_string(value)) < 0)
1022                         log_debug("Failed to parse state value %s", value);
1023                 else
1024                         m->deserialized_state = state;
1025         } else if (streq(key, "failure")) {
1026                 int b;
1027
1028                 if ((b = parse_boolean(value)) < 0)
1029                         log_debug("Failed to parse failure value %s", value);
1030                 else
1031                         m->failure = b || m->failure;
1032
1033         } else if (streq(key, "control-pid")) {
1034                 pid_t pid;
1035
1036                 if (parse_pid(value, &pid) < 0)
1037                         log_debug("Failed to parse control-pid value %s", value);
1038                 else
1039                         m->control_pid = pid;
1040         } else if (streq(key, "control-command")) {
1041                 MountExecCommand id;
1042
1043                 if ((id = mount_exec_command_from_string(value)) < 0)
1044                         log_debug("Failed to parse exec-command value %s", value);
1045                 else {
1046                         m->control_command_id = id;
1047                         m->control_command = m->exec_command + id;
1048                 }
1049
1050         } else
1051                 log_debug("Unknown serialization key '%s'", key);
1052
1053         return 0;
1054 }
1055
1056 static UnitActiveState mount_active_state(Unit *u) {
1057         assert(u);
1058
1059         return state_translation_table[MOUNT(u)->state];
1060 }
1061
1062 static const char *mount_sub_state_to_string(Unit *u) {
1063         assert(u);
1064
1065         return mount_state_to_string(MOUNT(u)->state);
1066 }
1067
1068 static bool mount_check_gc(Unit *u) {
1069         Mount *m = MOUNT(u);
1070
1071         assert(m);
1072
1073         return m->from_etc_fstab || m->from_proc_self_mountinfo;
1074 }
1075
1076 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1077         Mount *m = MOUNT(u);
1078         bool success;
1079
1080         assert(m);
1081         assert(pid >= 0);
1082
1083         if (pid != m->control_pid)
1084                 return;
1085
1086         m->control_pid = 0;
1087
1088         success = is_clean_exit(code, status);
1089         m->failure = m->failure || !success;
1090
1091         if (m->control_command) {
1092                 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1093                 m->control_command = NULL;
1094                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1095         }
1096
1097         log_full(success ? LOG_DEBUG : LOG_NOTICE,
1098                  "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1099
1100         /* Note that mount(8) returning and the kernel sending us a
1101          * mount table change event might happen out-of-order. If an
1102          * operation succeed we assume the kernel will follow soon too
1103          * and already change into the resulting state.  If it fails
1104          * we check if the kernel still knows about the mount. and
1105          * change state accordingly. */
1106
1107         switch (m->state) {
1108
1109         case MOUNT_MOUNTING:
1110         case MOUNT_MOUNTING_DONE:
1111         case MOUNT_MOUNTING_SIGKILL:
1112         case MOUNT_MOUNTING_SIGTERM:
1113
1114                 if (success)
1115                         mount_enter_mounted(m, true);
1116                 else if (m->from_proc_self_mountinfo)
1117                         mount_enter_mounted(m, false);
1118                 else
1119                         mount_enter_dead(m, false);
1120                 break;
1121
1122         case MOUNT_REMOUNTING:
1123         case MOUNT_REMOUNTING_SIGKILL:
1124         case MOUNT_REMOUNTING_SIGTERM:
1125
1126                 m->reload_failure = !success;
1127                 if (m->from_proc_self_mountinfo)
1128                         mount_enter_mounted(m, true);
1129                 else
1130                         mount_enter_dead(m, true);
1131
1132                 break;
1133
1134         case MOUNT_UNMOUNTING:
1135         case MOUNT_UNMOUNTING_SIGKILL:
1136         case MOUNT_UNMOUNTING_SIGTERM:
1137
1138                 if (success)
1139                         mount_enter_dead(m, true);
1140                 else if (m->from_proc_self_mountinfo)
1141                         mount_enter_mounted(m, false);
1142                 else
1143                         mount_enter_dead(m, false);
1144                 break;
1145
1146         default:
1147                 assert_not_reached("Uh, control process died at wrong time.");
1148         }
1149
1150         /* Notify clients about changed exit status */
1151         unit_add_to_dbus_queue(u);
1152 }
1153
1154 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1155         Mount *m = MOUNT(u);
1156
1157         assert(m);
1158         assert(elapsed == 1);
1159         assert(w == &m->timer_watch);
1160
1161         switch (m->state) {
1162
1163         case MOUNT_MOUNTING:
1164         case MOUNT_MOUNTING_DONE:
1165                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1166                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1167                 break;
1168
1169         case MOUNT_REMOUNTING:
1170                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1171                 m->reload_failure = true;
1172                 mount_enter_mounted(m, true);
1173                 break;
1174
1175         case MOUNT_UNMOUNTING:
1176                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1177                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1178                 break;
1179
1180         case MOUNT_MOUNTING_SIGTERM:
1181                 if (m->exec_context.send_sigkill) {
1182                         log_warning("%s mounting timed out. Killing.", u->meta.id);
1183                         mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1184                 } else {
1185                         log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1186
1187                         if (m->from_proc_self_mountinfo)
1188                                 mount_enter_mounted(m, false);
1189                         else
1190                                 mount_enter_dead(m, false);
1191                 }
1192                 break;
1193
1194         case MOUNT_REMOUNTING_SIGTERM:
1195                 if (m->exec_context.send_sigkill) {
1196                         log_warning("%s remounting timed out. Killing.", u->meta.id);
1197                         mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1198                 } else {
1199                         log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1200
1201                         if (m->from_proc_self_mountinfo)
1202                                 mount_enter_mounted(m, false);
1203                         else
1204                                 mount_enter_dead(m, false);
1205                 }
1206                 break;
1207
1208         case MOUNT_UNMOUNTING_SIGTERM:
1209                 if (m->exec_context.send_sigkill) {
1210                         log_warning("%s unmounting timed out. Killing.", u->meta.id);
1211                         mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1212                 } else {
1213                         log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1214
1215                         if (m->from_proc_self_mountinfo)
1216                                 mount_enter_mounted(m, false);
1217                         else
1218                                 mount_enter_dead(m, false);
1219                 }
1220                 break;
1221
1222         case MOUNT_MOUNTING_SIGKILL:
1223         case MOUNT_REMOUNTING_SIGKILL:
1224         case MOUNT_UNMOUNTING_SIGKILL:
1225                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1226
1227                 if (m->from_proc_self_mountinfo)
1228                         mount_enter_mounted(m, false);
1229                 else
1230                         mount_enter_dead(m, false);
1231                 break;
1232
1233         default:
1234                 assert_not_reached("Timeout at wrong time.");
1235         }
1236 }
1237
1238 static int mount_add_one(
1239                 Manager *m,
1240                 const char *what,
1241                 const char *where,
1242                 const char *options,
1243                 const char *fstype,
1244                 int passno,
1245                 bool from_proc_self_mountinfo,
1246                 bool set_flags) {
1247         int r;
1248         Unit *u;
1249         bool delete;
1250         char *e, *w = NULL, *o = NULL, *f = NULL;
1251         MountParameters *p;
1252
1253         assert(m);
1254         assert(what);
1255         assert(where);
1256         assert(options);
1257         assert(fstype);
1258
1259         assert(!set_flags || from_proc_self_mountinfo);
1260
1261         /* Ignore API mount points. They should never be referenced in
1262          * dependencies ever. */
1263         if (mount_point_is_api(where))
1264                 return 0;
1265         if (mount_point_ignore(where))
1266                 return 0;
1267
1268         if (streq(fstype, "autofs"))
1269                 return 0;
1270
1271         /* probably some kind of swap, ignore */
1272         if (!is_path(where))
1273                 return 0;
1274
1275         if (!(e = unit_name_from_path(where, ".mount")))
1276                 return -ENOMEM;
1277
1278         if (!(u = manager_get_unit(m, e))) {
1279                 delete = true;
1280
1281                 if (!(u = unit_new(m))) {
1282                         free(e);
1283                         return -ENOMEM;
1284                 }
1285
1286                 r = unit_add_name(u, e);
1287                 free(e);
1288
1289                 if (r < 0)
1290                         goto fail;
1291
1292                 if (!(MOUNT(u)->where = strdup(where))) {
1293                         r = -ENOMEM;
1294                         goto fail;
1295                 }
1296
1297                 unit_add_to_load_queue(u);
1298         } else {
1299                 delete = false;
1300                 free(e);
1301         }
1302
1303         if (!(w = strdup(what)) ||
1304             !(o = strdup(options)) ||
1305             !(f = strdup(fstype))) {
1306                 r = -ENOMEM;
1307                 goto fail;
1308         }
1309
1310         if (from_proc_self_mountinfo) {
1311                 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1312
1313                 if (set_flags) {
1314                         MOUNT(u)->is_mounted = true;
1315                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1316                         MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1317                 }
1318
1319                 MOUNT(u)->from_proc_self_mountinfo = true;
1320         } else {
1321                 p = &MOUNT(u)->parameters_etc_fstab;
1322                 MOUNT(u)->from_etc_fstab = true;
1323         }
1324
1325         free(p->what);
1326         p->what = w;
1327
1328         free(p->options);
1329         p->options = o;
1330
1331         free(p->fstype);
1332         p->fstype = f;
1333
1334         p->passno = passno;
1335
1336         unit_add_to_dbus_queue(u);
1337
1338         return 0;
1339
1340 fail:
1341         free(w);
1342         free(o);
1343         free(f);
1344
1345         if (delete && u)
1346                 unit_free(u);
1347
1348         return r;
1349 }
1350
1351 static int mount_find_pri(char *options) {
1352         char *end, *pri;
1353         unsigned long r;
1354
1355         if (!(pri = mount_test_option(options, "pri=")))
1356                 return 0;
1357
1358         pri += 4;
1359
1360         errno = 0;
1361         r = strtoul(pri, &end, 10);
1362
1363         if (errno != 0)
1364                 return -errno;
1365
1366         if (end == pri || (*end != ',' && *end != 0))
1367                 return -EINVAL;
1368
1369         return (int) r;
1370 }
1371
1372 static int mount_load_etc_fstab(Manager *m) {
1373         FILE *f;
1374         int r = 0;
1375         struct mntent* me;
1376
1377         assert(m);
1378
1379         errno = 0;
1380         if (!(f = setmntent("/etc/fstab", "r")))
1381                 return -errno;
1382
1383         while ((me = getmntent(f))) {
1384                 char *where, *what;
1385                 int k;
1386
1387                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1388                         r = -ENOMEM;
1389                         goto finish;
1390                 }
1391
1392                 if (!(where = strdup(me->mnt_dir))) {
1393                         free(what);
1394                         r = -ENOMEM;
1395                         goto finish;
1396                 }
1397
1398                 if (what[0] == '/')
1399                         path_kill_slashes(what);
1400
1401                 if (where[0] == '/')
1402                         path_kill_slashes(where);
1403
1404                 if (streq(me->mnt_type, "swap")) {
1405                         int pri;
1406
1407                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1408                                 k = pri;
1409                         else
1410                                 k = swap_add_one(m,
1411                                                  what,
1412                                                  NULL,
1413                                                  pri,
1414                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1415                                                  !!mount_test_option(me->mnt_opts, "nofail"),
1416                                                  !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1417                                                  false);
1418                 } else
1419                         k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1420
1421                 free(what);
1422                 free(where);
1423
1424                 if (r < 0)
1425                         r = k;
1426         }
1427
1428 finish:
1429
1430         endmntent(f);
1431         return r;
1432 }
1433
1434 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1435         int r = 0;
1436         unsigned i;
1437         char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1438
1439         assert(m);
1440
1441         rewind(m->proc_self_mountinfo);
1442
1443         for (i = 1;; i++) {
1444                 int k;
1445
1446                 device = path = options = options2 = fstype = d = p = o = NULL;
1447
1448                 if ((k = fscanf(m->proc_self_mountinfo,
1449                                 "%*s "       /* (1) mount id */
1450                                 "%*s "       /* (2) parent id */
1451                                 "%*s "       /* (3) major:minor */
1452                                 "%*s "       /* (4) root */
1453                                 "%ms "       /* (5) mount point */
1454                                 "%ms"        /* (6) mount options */
1455                                 "%*[^-]"     /* (7) optional fields */
1456                                 "- "         /* (8) separator */
1457                                 "%ms "       /* (9) file system type */
1458                                 "%ms"        /* (10) mount source */
1459                                 "%ms"        /* (11) mount options 2 */
1460                                 "%*[^\n]",   /* some rubbish at the end */
1461                                 &path,
1462                                 &options,
1463                                 &fstype,
1464                                 &device,
1465                                 &options2)) != 5) {
1466
1467                         if (k == EOF)
1468                                 break;
1469
1470                         log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1471                         goto clean_up;
1472                 }
1473
1474                 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1475                         r = -ENOMEM;
1476                         goto finish;
1477                 }
1478
1479                 if (!(d = cunescape(device)) ||
1480                     !(p = cunescape(path))) {
1481                         r = -ENOMEM;
1482                         goto finish;
1483                 }
1484
1485                 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1486                         r = k;
1487
1488 clean_up:
1489                 free(device);
1490                 free(path);
1491                 free(options);
1492                 free(options2);
1493                 free(fstype);
1494                 free(d);
1495                 free(p);
1496                 free(o);
1497         }
1498
1499 finish:
1500         free(device);
1501         free(path);
1502         free(options);
1503         free(options2);
1504         free(fstype);
1505         free(d);
1506         free(p);
1507         free(o);
1508
1509         return r;
1510 }
1511
1512 static void mount_shutdown(Manager *m) {
1513         assert(m);
1514
1515         if (m->proc_self_mountinfo) {
1516                 fclose(m->proc_self_mountinfo);
1517                 m->proc_self_mountinfo = NULL;
1518         }
1519 }
1520
1521 static int mount_enumerate(Manager *m) {
1522         int r;
1523         struct epoll_event ev;
1524         assert(m);
1525
1526         if (!m->proc_self_mountinfo) {
1527                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1528                         return -errno;
1529
1530                 m->mount_watch.type = WATCH_MOUNT;
1531                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1532
1533                 zero(ev);
1534                 ev.events = EPOLLPRI;
1535                 ev.data.ptr = &m->mount_watch;
1536
1537                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1538                         return -errno;
1539         }
1540
1541         if ((r = mount_load_etc_fstab(m)) < 0)
1542                 goto fail;
1543
1544         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1545                 goto fail;
1546
1547         return 0;
1548
1549 fail:
1550         mount_shutdown(m);
1551         return r;
1552 }
1553
1554 void mount_fd_event(Manager *m, int events) {
1555         Meta *meta;
1556         int r;
1557
1558         assert(m);
1559         assert(events & EPOLLPRI);
1560
1561         /* The manager calls this for every fd event happening on the
1562          * /proc/self/mountinfo file, which informs us about mounting
1563          * table changes */
1564
1565         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1566                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1567
1568                 /* Reset flags, just in case, for later calls */
1569                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1570                         Mount *mount = (Mount*) meta;
1571
1572                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1573                 }
1574
1575                 return;
1576         }
1577
1578         manager_dispatch_load_queue(m);
1579
1580         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1581                 Mount *mount = (Mount*) meta;
1582
1583                 if (!mount->is_mounted) {
1584                         /* This has just been unmounted. */
1585
1586                         mount->from_proc_self_mountinfo = false;
1587
1588                         switch (mount->state) {
1589
1590                         case MOUNT_MOUNTED:
1591                                 mount_enter_dead(mount, true);
1592                                 break;
1593
1594                         default:
1595                                 mount_set_state(mount, mount->state);
1596                                 break;
1597
1598                         }
1599
1600                 } else if (mount->just_mounted || mount->just_changed) {
1601
1602                         /* New or changed mount entry */
1603
1604                         switch (mount->state) {
1605
1606                         case MOUNT_DEAD:
1607                         case MOUNT_FAILED:
1608                                 mount_enter_mounted(mount, true);
1609                                 break;
1610
1611                         case MOUNT_MOUNTING:
1612                                 mount_enter_mounting_done(mount);
1613                                 break;
1614
1615                         default:
1616                                 /* Nothing really changed, but let's
1617                                  * issue an notification call
1618                                  * nonetheless, in case somebody is
1619                                  * waiting for this. (e.g. file system
1620                                  * ro/rw remounts.) */
1621                                 mount_set_state(mount, mount->state);
1622                                 break;
1623                         }
1624                 }
1625
1626                 /* Reset the flags for later calls */
1627                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1628         }
1629 }
1630
1631 static void mount_reset_failed(Unit *u) {
1632         Mount *m = MOUNT(u);
1633
1634         assert(m);
1635
1636         if (m->state == MOUNT_FAILED)
1637                 mount_set_state(m, MOUNT_DEAD);
1638
1639         m->failure = false;
1640 }
1641
1642 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1643         Mount *m = MOUNT(u);
1644         int r = 0;
1645         Set *pid_set = NULL;
1646
1647         assert(m);
1648
1649         if (who == KILL_MAIN) {
1650                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1651                 return -EINVAL;
1652         }
1653
1654         if (m->control_pid <= 0 && who == KILL_CONTROL) {
1655                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1656                 return -ENOENT;
1657         }
1658
1659         if (m->control_pid > 0)
1660                 if (kill(mode == KILL_PROCESS_GROUP ? -m->control_pid : m->control_pid, signo) < 0)
1661                         r = -errno;
1662
1663         if (mode == KILL_CONTROL_GROUP) {
1664                 int q;
1665
1666                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1667                         return -ENOMEM;
1668
1669                 /* Exclude the control pid from being killed via the cgroup */
1670                 if (m->control_pid > 0)
1671                         if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1672                                 r = q;
1673                                 goto finish;
1674                         }
1675
1676                 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, pid_set)) < 0)
1677                         if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1678                                 r = q;
1679         }
1680
1681 finish:
1682         if (pid_set)
1683                 set_free(pid_set);
1684
1685         return r;
1686 }
1687
1688 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1689         [MOUNT_DEAD] = "dead",
1690         [MOUNT_MOUNTING] = "mounting",
1691         [MOUNT_MOUNTING_DONE] = "mounting-done",
1692         [MOUNT_MOUNTED] = "mounted",
1693         [MOUNT_REMOUNTING] = "remounting",
1694         [MOUNT_UNMOUNTING] = "unmounting",
1695         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1696         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1697         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1698         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1699         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1700         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1701         [MOUNT_FAILED] = "failed"
1702 };
1703
1704 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1705
1706 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1707         [MOUNT_EXEC_MOUNT] = "ExecMount",
1708         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1709         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1710 };
1711
1712 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1713
1714 const UnitVTable mount_vtable = {
1715         .suffix = ".mount",
1716
1717         .no_alias = true,
1718         .no_instances = true,
1719         .no_isolate = true,
1720         .show_status = true,
1721
1722         .init = mount_init,
1723         .load = mount_load,
1724         .done = mount_done,
1725
1726         .coldplug = mount_coldplug,
1727
1728         .dump = mount_dump,
1729
1730         .start = mount_start,
1731         .stop = mount_stop,
1732         .reload = mount_reload,
1733
1734         .kill = mount_kill,
1735
1736         .serialize = mount_serialize,
1737         .deserialize_item = mount_deserialize_item,
1738
1739         .active_state = mount_active_state,
1740         .sub_state_to_string = mount_sub_state_to_string,
1741
1742         .check_gc = mount_check_gc,
1743
1744         .sigchld_event = mount_sigchld_event,
1745         .timer_event = mount_timer_event,
1746
1747         .reset_failed = mount_reset_failed,
1748
1749         .bus_interface = "org.freedesktop.systemd1.Mount",
1750         .bus_message_handler = bus_mount_message_handler,
1751         .bus_invalidating_properties =  bus_mount_invalidating_properties,
1752
1753         .enumerate = mount_enumerate,
1754         .shutdown = mount_shutdown
1755 };