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         m->exec_context.std_output = EXEC_OUTPUT_KMSG;
  68
  69         /* We need to make sure that /bin/mount is always called in
  70          * the same process group as us, so that the autofs kernel
  71          * side doesn't send us another mount request while we are
  72          * already trying to comply its last one. */
  73         m->exec_context.same_pgrp = true;
  74
  75         m->timer_watch.type = WATCH_INVALID;
  76
  77         m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
  78 }
  79
  80 static void mount_unwatch_control_pid(Mount *m) {
  81         assert(m);
  82
  83         if (m->control_pid <= 0)
  84                 return;
  85
  86         unit_unwatch_pid(UNIT(m), m->control_pid);
  87         m->control_pid = 0;
  88 }
  89
  90 static void mount_parameters_done(MountParameters *p) {
  91         assert(p);
  92
  93         free(p->what);
  94         free(p->options);
  95         free(p->fstype);
  96
  97         p->what = p->options = p->fstype = NULL;
  98 }
  99
 100 static void mount_done(Unit *u) {
 101         Mount *m = MOUNT(u);
 102         Meta *other;
 103
 104         assert(m);
 105
 106         free(m->where);
 107         m->where = NULL;
 108
 109         /* Try to detach us from the automount unit if there is any */
 110         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT]) {
 111                 Automount *a = (Automount*) other;
 112
 113                 if (a->mount == m)
 114                         a->mount = NULL;
 115         }
 116
 117         mount_parameters_done(&m->parameters_etc_fstab);
 118         mount_parameters_done(&m->parameters_proc_self_mountinfo);
 119         mount_parameters_done(&m->parameters_fragment);
 120
 121         exec_context_done(&m->exec_context);
 122         exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
 123         m->control_command = NULL;
 124
 125         mount_unwatch_control_pid(m);
 126
 127         unit_unwatch_timer(u, &m->timer_watch);
 128 }
 129
 130 static int mount_add_mount_links(Mount *m) {
 131         Meta *other;
 132         int r;
 133         MountParameters *pm;
 134
 135         assert(m);
 136
 137         if (m->from_fragment)
 138                 pm = &m->parameters_fragment;
 139         else if (m->from_etc_fstab)
 140                 pm = &m->parameters_etc_fstab;
 141         else
 142                 pm = NULL;
 143
 144         /* Adds in links to other mount points that might lie below or
 145          * above us in the hierarchy */
 146
 147         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
 148                 Mount *n = (Mount*) other;
 149                 MountParameters *pn;
 150
 151                 if (n == m)
 152                         continue;
 153
 154                 if (n->meta.load_state != UNIT_LOADED)
 155                         continue;
 156
 157                 if (n->from_fragment)
 158                         pn = &n->parameters_fragment;
 159                 else if (n->from_etc_fstab)
 160                         pn = &n->parameters_etc_fstab;
 161                 else
 162                         pn = NULL;
 163
 164                 if (path_startswith(m->where, n->where)) {
 165
 166                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 167                                 return r;
 168
 169                         if (n->from_etc_fstab || n->from_fragment)
 170                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 171                                         return r;
 172
 173                 } else if (path_startswith(n->where, m->where)) {
 174
 175                         if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
 176                                 return r;
 177
 178                         if (m->from_etc_fstab || m->from_fragment)
 179                                 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 180                                         return r;
 181
 182                 } else if (pm && path_startswith(pm->what, n->where)) {
 183
 184                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 185                                 return r;
 186
 187                         if (m->from_etc_fstab || m->from_fragment)
 188                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 189                                         return r;
 190
 191                 } else if (pn && path_startswith(pn->what, m->where)) {
 192
 193                         if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
 194                                 return r;
 195
 196                         if (n->from_etc_fstab || n->from_fragment)
 197                                 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 198                                         return r;
 199                 }
 200         }
 201
 202         return 0;
 203 }
 204
 205 static int mount_add_swap_links(Mount *m) {
 206         Meta *other;
 207         int r;
 208
 209         assert(m);
 210
 211         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
 212                 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
 213                         return r;
 214
 215         return 0;
 216 }
 217
 218 static int mount_add_path_links(Mount *m) {
 219         Meta *other;
 220         int r;
 221
 222         assert(m);
 223
 224         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
 225                 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
 226                         return r;
 227
 228         return 0;
 229 }
 230
 231 static int mount_add_automount_links(Mount *m) {
 232         Meta *other;
 233         int r;
 234
 235         assert(m);
 236
 237         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
 238                 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
 239                         return r;
 240
 241         return 0;
 242 }
 243
 244 static int mount_add_socket_links(Mount *m) {
 245         Meta *other;
 246         int r;
 247
 248         assert(m);
 249
 250         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
 251                 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
 252                         return r;
 253
 254         return 0;
 255 }
 256
 257 static char* mount_test_option(const char *haystack, const char *needle) {
 258         struct mntent me;
 259
 260         assert(needle);
 261
 262         /* Like glibc's hasmntopt(), but works on a string, not a
 263          * struct mntent */
 264
 265         if (!haystack)
 266                 return false;
 267
 268         zero(me);
 269         me.mnt_opts = (char*) haystack;
 270
 271         return hasmntopt(&me, needle);
 272 }
 273
 274 static int mount_add_target_links(Mount *m) {
 275         const char *target, *after = NULL;
 276         MountParameters *p;
 277         Unit *tu;
 278         int r;
 279         bool noauto, nofail, handle, automount;
 280
 281         assert(m);
 282
 283         if (m->from_fragment)
 284                 p = &m->parameters_fragment;
 285         else if (m->from_etc_fstab)
 286                 p = &m->parameters_etc_fstab;
 287         else
 288                 return 0;
 289
 290         noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 291         nofail = !!mount_test_option(p->options, "nofail");
 292         handle = !!mount_test_option(p->options, "comment=systemd.mount") ||
 293                 m->meta.manager->mount_auto;
 294         automount = !!mount_test_option(p->options, "comment=systemd.automount");
 295
 296         if (mount_test_option(p->options, "_netdev") ||
 297             (p->fstype && fstype_is_network(p->fstype))) {
 298                 target = SPECIAL_REMOTE_FS_TARGET;
 299
 300                 if (m->meta.manager->running_as == MANAGER_SYSTEM)
 301                         after = SPECIAL_NETWORK_TARGET;
 302         } else
 303                 target = SPECIAL_LOCAL_FS_TARGET;
 304
 305         if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
 306                 return r;
 307
 308         if (after)
 309                 if ((r = unit_add_dependency_by_name(tu, UNIT_AFTER, after, NULL, true)) < 0)
 310                         return r;
 311
 312         if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
 313                 Unit *am;
 314
 315                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
 316                         return r;
 317
 318                 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
 319         } else {
 320
 321                 /* Automatically add mount points that aren't natively
 322                  * configured to local-fs.target */
 323                 if (!noauto &&
 324                     !nofail &&
 325                     handle &&
 326                     m->from_etc_fstab &&
 327                     m->meta.manager->running_as == MANAGER_SYSTEM)
 328                         if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
 329                                 return r;
 330
 331                 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
 332         }
 333 }
 334
 335 static bool mount_is_bind(MountParameters *p) {
 336         assert(p);
 337
 338         if (p->fstype && streq(p->fstype, "bind"))
 339                 return true;
 340
 341         if (mount_test_option(p->options, "bind"))
 342                 return true;
 343
 344         return false;
 345 }
 346
 347 static int mount_add_device_links(Mount *m) {
 348         MountParameters *p;
 349         int r;
 350
 351         assert(m);
 352
 353         if (m->from_fragment)
 354                 p = &m->parameters_fragment;
 355         else if (m->from_etc_fstab)
 356                 p = &m->parameters_etc_fstab;
 357         else
 358                 return 0;
 359
 360         if (!p->what)
 361                 return 0;
 362
 363         if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
 364                 bool nofail, noauto;
 365
 366                 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 367                 nofail = !!mount_test_option(p->options, "nofail");
 368
 369                 if ((r = unit_add_node_link(UNIT(m), p->what,
 370                                             !noauto && nofail &&
 371                                             UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
 372                         return r;
 373         }
 374
 375         if (p->passno > 0 &&
 376             !mount_is_bind(p) &&
 377             UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
 378             !path_equal(m->where, "/")) {
 379                 char *name;
 380                 Unit *fsck;
 381                 /* Let's add in the fsck service */
 382
 383                 /* aka SPECIAL_FSCK_SERVICE */
 384                 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
 385                         return -ENOMEM;
 386
 387                 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
 388                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
 389                         free(name);
 390                         return r;
 391                 }
 392
 393                 free(name);
 394
 395                 SERVICE(fsck)->fsck_passno = p->passno;
 396
 397                 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
 398                         return r;
 399         }
 400
 401         return 0;
 402 }
 403
 404 static int mount_add_default_dependencies(Mount *m) {
 405         int r;
 406
 407         assert(m);
 408
 409         if (m->meta.manager->running_as == MANAGER_SYSTEM &&
 410             !path_equal(m->where, "/")) {
 411
 412                 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_BEFORE, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0)
 413                         return r;
 414
 415                 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
 416                         return r;
 417         }
 418
 419         return 0;
 420 }
 421
 422 static int mount_verify(Mount *m) {
 423         bool b;
 424         char *e;
 425         assert(m);
 426
 427         if (m->meta.load_state != UNIT_LOADED)
 428                 return 0;
 429
 430         if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
 431                 return -ENOENT;
 432
 433         if (!(e = unit_name_from_path(m->where, ".mount")))
 434                 return -ENOMEM;
 435
 436         b = unit_has_name(UNIT(m), e);
 437         free(e);
 438
 439         if (!b) {
 440                 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
 441                 return -EINVAL;
 442         }
 443
 444         if (m->meta.fragment_path && !m->parameters_fragment.what) {
 445                 log_error("%s's What setting is missing. Refusing.", m->meta.id);
 446                 return -EBADMSG;
 447         }
 448
 449         if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 450                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
 451                 return -EINVAL;
 452         }
 453
 454         return 0;
 455 }
 456
 457 static int mount_load(Unit *u) {
 458         Mount *m = MOUNT(u);
 459         int r;
 460
 461         assert(u);
 462         assert(u->meta.load_state == UNIT_STUB);
 463
 464         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
 465                 return r;
 466
 467         /* This is a new unit? Then let's add in some extras */
 468         if (u->meta.load_state == UNIT_LOADED) {
 469                 if (m->meta.fragment_path)
 470                         m->from_fragment = true;
 471
 472                 if (!m->where)
 473                         if (!(m->where = unit_name_to_path(u->meta.id)))
 474                                 return -ENOMEM;
 475
 476                 path_kill_slashes(m->where);
 477
 478                 if (!m->meta.description)
 479                         if ((r = unit_set_description(u, m->where)) < 0)
 480                                 return r;
 481
 482                 if ((r = mount_add_device_links(m)) < 0)
 483                         return r;
 484
 485                 if ((r = mount_add_mount_links(m)) < 0)
 486                         return r;
 487
 488                 if ((r = mount_add_socket_links(m)) < 0)
 489                         return r;
 490
 491                 if ((r = mount_add_swap_links(m)) < 0)
 492                         return r;
 493
 494                 if ((r = mount_add_path_links(m)) < 0)
 495                         return r;
 496
 497                 if ((r = mount_add_automount_links(m)) < 0)
 498                         return r;
 499
 500                 if ((r = mount_add_target_links(m)) < 0)
 501                         return r;
 502
 503                 if ((r = unit_add_default_cgroups(u)) < 0)
 504                         return r;
 505
 506                 if (m->meta.default_dependencies)
 507                         if ((r = mount_add_default_dependencies(m)) < 0)
 508                                 return r;
 509         }
 510
 511         return mount_verify(m);
 512 }
 513
 514 static int mount_notify_automount(Mount *m, int status) {
 515         Unit *p;
 516         int r;
 517
 518         assert(m);
 519
 520         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
 521                 return r == -ENOENT ? 0 : r;
 522
 523         return automount_send_ready(AUTOMOUNT(p), status);
 524 }
 525
 526 static void mount_set_state(Mount *m, MountState state) {
 527         MountState old_state;
 528         assert(m);
 529
 530         old_state = m->state;
 531         m->state = state;
 532
 533         if (state != MOUNT_MOUNTING &&
 534             state != MOUNT_MOUNTING_DONE &&
 535             state != MOUNT_REMOUNTING &&
 536             state != MOUNT_UNMOUNTING &&
 537             state != MOUNT_MOUNTING_SIGTERM &&
 538             state != MOUNT_MOUNTING_SIGKILL &&
 539             state != MOUNT_UNMOUNTING_SIGTERM &&
 540             state != MOUNT_UNMOUNTING_SIGKILL &&
 541             state != MOUNT_REMOUNTING_SIGTERM &&
 542             state != MOUNT_REMOUNTING_SIGKILL) {
 543                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
 544                 mount_unwatch_control_pid(m);
 545                 m->control_command = NULL;
 546                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 547         }
 548
 549         if (state == MOUNT_MOUNTED ||
 550             state == MOUNT_REMOUNTING)
 551                 mount_notify_automount(m, 0);
 552         else if (state == MOUNT_DEAD ||
 553                  state == MOUNT_UNMOUNTING ||
 554                  state == MOUNT_MOUNTING_SIGTERM ||
 555                  state == MOUNT_MOUNTING_SIGKILL ||
 556                  state == MOUNT_REMOUNTING_SIGTERM ||
 557                  state == MOUNT_REMOUNTING_SIGKILL ||
 558                  state == MOUNT_UNMOUNTING_SIGTERM ||
 559                  state == MOUNT_UNMOUNTING_SIGKILL ||
 560                  state == MOUNT_FAILED)
 561                 mount_notify_automount(m, -ENODEV);
 562
 563         if (state != old_state)
 564                 log_debug("%s changed %s -> %s",
 565                           m->meta.id,
 566                           mount_state_to_string(old_state),
 567                           mount_state_to_string(state));
 568
 569         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
 570         m->reload_failure = false;
 571 }
 572
 573 static int mount_coldplug(Unit *u) {
 574         Mount *m = MOUNT(u);
 575         MountState new_state = MOUNT_DEAD;
 576         int r;
 577
 578         assert(m);
 579         assert(m->state == MOUNT_DEAD);
 580
 581         if (m->deserialized_state != m->state)
 582                 new_state = m->deserialized_state;
 583         else if (m->from_proc_self_mountinfo)
 584                 new_state = MOUNT_MOUNTED;
 585
 586         if (new_state != m->state) {
 587
 588                 if (new_state == MOUNT_MOUNTING ||
 589                     new_state == MOUNT_MOUNTING_DONE ||
 590                     new_state == MOUNT_REMOUNTING ||
 591                     new_state == MOUNT_UNMOUNTING ||
 592                     new_state == MOUNT_MOUNTING_SIGTERM ||
 593                     new_state == MOUNT_MOUNTING_SIGKILL ||
 594                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
 595                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
 596                     new_state == MOUNT_REMOUNTING_SIGTERM ||
 597                     new_state == MOUNT_REMOUNTING_SIGKILL) {
 598
 599                         if (m->control_pid <= 0)
 600                                 return -EBADMSG;
 601
 602                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
 603                                 return r;
 604
 605                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 606                                 return r;
 607                 }
 608
 609                 mount_set_state(m, new_state);
 610         }
 611
 612         return 0;
 613 }
 614
 615 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
 616         Mount *m = MOUNT(u);
 617         MountParameters *p;
 618
 619         assert(m);
 620         assert(f);
 621
 622         if (m->from_proc_self_mountinfo)
 623                 p = &m->parameters_proc_self_mountinfo;
 624         else if (m->from_fragment)
 625                 p = &m->parameters_fragment;
 626         else
 627                 p = &m->parameters_etc_fstab;
 628
 629         fprintf(f,
 630                 "%sMount State: %s\n"
 631                 "%sWhere: %s\n"
 632                 "%sWhat: %s\n"
 633                 "%sFile System Type: %s\n"
 634                 "%sOptions: %s\n"
 635                 "%sFrom /etc/fstab: %s\n"
 636                 "%sFrom /proc/self/mountinfo: %s\n"
 637                 "%sFrom fragment: %s\n"
 638                 "%sDirectoryMode: %04o\n",
 639                 prefix, mount_state_to_string(m->state),
 640                 prefix, m->where,
 641                 prefix, strna(p->what),
 642                 prefix, strna(p->fstype),
 643                 prefix, strna(p->options),
 644                 prefix, yes_no(m->from_etc_fstab),
 645                 prefix, yes_no(m->from_proc_self_mountinfo),
 646                 prefix, yes_no(m->from_fragment),
 647                 prefix, m->directory_mode);
 648
 649         if (m->control_pid > 0)
 650                 fprintf(f,
 651                         "%sControl PID: %lu\n",
 652                         prefix, (unsigned long) m->control_pid);
 653
 654         exec_context_dump(&m->exec_context, f, prefix);
 655 }
 656
 657 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 658         pid_t pid;
 659         int r;
 660
 661         assert(m);
 662         assert(c);
 663         assert(_pid);
 664
 665         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 666                 goto fail;
 667
 668         if ((r = exec_spawn(c,
 669                             NULL,
 670                             &m->exec_context,
 671                             NULL, 0,
 672                             m->meta.manager->environment,
 673                             true,
 674                             true,
 675                             true,
 676                             m->meta.manager->confirm_spawn,
 677                             m->meta.cgroup_bondings,
 678                             &pid)) < 0)
 679                 goto fail;
 680
 681         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 682                 /* FIXME: we need to do something here */
 683                 goto fail;
 684
 685         *_pid = pid;
 686
 687         return 0;
 688
 689 fail:
 690         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 691
 692         return r;
 693 }
 694
 695 static void mount_enter_dead(Mount *m, bool success) {
 696         assert(m);
 697
 698         if (!success)
 699                 m->failure = true;
 700
 701         mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
 702 }
 703
 704 static void mount_enter_mounted(Mount *m, bool success) {
 705         assert(m);
 706
 707         if (!success)
 708                 m->failure = true;
 709
 710         mount_set_state(m, MOUNT_MOUNTED);
 711 }
 712
 713 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 714         int r;
 715         Set *pid_set = NULL;
 716         bool wait_for_exit = false;
 717
 718         assert(m);
 719
 720         if (!success)
 721                 m->failure = true;
 722
 723         if (m->exec_context.kill_mode != KILL_NONE) {
 724                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 725                            state == MOUNT_UNMOUNTING_SIGTERM ||
 726                            state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
 727
 728                 if (m->control_pid > 0) {
 729                         if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
 730                                  -m->control_pid :
 731                                  m->control_pid, sig) < 0 && errno != ESRCH)
 732
 733                                 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
 734                         else
 735                                 wait_for_exit = true;
 736                 }
 737
 738                 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
 739
 740                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
 741                                 r = -ENOMEM;
 742                                 goto fail;
 743                         }
 744
 745                         /* Exclude the control pid from being killed via the cgroup */
 746                         if (m->control_pid > 0)
 747                                 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
 748                                         goto fail;
 749
 750                         if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
 751                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
 752                                         log_warning("Failed to kill control group: %s", strerror(-r));
 753                         } else if (r > 0)
 754                                 wait_for_exit = true;
 755
 756                         set_free(pid_set);
 757                 }
 758         }
 759
 760         if (wait_for_exit) {
 761                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 762                         goto fail;
 763
 764                 mount_set_state(m, state);
 765         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 766                 mount_enter_mounted(m, true);
 767         else
 768                 mount_enter_dead(m, true);
 769
 770         return;
 771
 772 fail:
 773         log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
 774
 775         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 776                 mount_enter_mounted(m, false);
 777         else
 778                 mount_enter_dead(m, false);
 779
 780         if (pid_set)
 781                 set_free(pid_set);
 782 }
 783
 784 static void mount_enter_unmounting(Mount *m, bool success) {
 785         int r;
 786
 787         assert(m);
 788
 789         if (!success)
 790                 m->failure = true;
 791
 792         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 793         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 794
 795         if ((r = exec_command_set(
 796                              m->control_command,
 797                              "/bin/umount",
 798                              m->where,
 799                              NULL)) < 0)
 800                 goto fail;
 801
 802         mount_unwatch_control_pid(m);
 803
 804         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 805                 goto fail;
 806
 807         mount_set_state(m, MOUNT_UNMOUNTING);
 808
 809         return;
 810
 811 fail:
 812         log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
 813         mount_enter_mounted(m, false);
 814 }
 815
 816 static void mount_enter_mounting(Mount *m) {
 817         int r;
 818
 819         assert(m);
 820
 821         m->control_command_id = MOUNT_EXEC_MOUNT;
 822         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 823
 824         mkdir_p(m->where, m->directory_mode);
 825
 826         if (m->from_fragment)
 827                 r = exec_command_set(
 828                                 m->control_command,
 829                                 "/bin/mount",
 830                                 m->parameters_fragment.what,
 831                                 m->where,
 832                                 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
 833                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 834                                 NULL);
 835         else if (m->from_etc_fstab)
 836                 r = exec_command_set(
 837                                 m->control_command,
 838                                 "/bin/mount",
 839                                 m->where,
 840                                 NULL);
 841         else
 842                 r = -ENOENT;
 843
 844         if (r < 0)
 845                 goto fail;
 846
 847         mount_unwatch_control_pid(m);
 848
 849         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 850                 goto fail;
 851
 852         mount_set_state(m, MOUNT_MOUNTING);
 853
 854         return;
 855
 856 fail:
 857         log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
 858         mount_enter_dead(m, false);
 859 }
 860
 861 static void mount_enter_mounting_done(Mount *m) {
 862         assert(m);
 863
 864         mount_set_state(m, MOUNT_MOUNTING_DONE);
 865 }
 866
 867 static void mount_enter_remounting(Mount *m, bool success) {
 868         int r;
 869
 870         assert(m);
 871
 872         if (!success)
 873                 m->failure = true;
 874
 875         m->control_command_id = MOUNT_EXEC_REMOUNT;
 876         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 877
 878         if (m->from_fragment) {
 879                 char *buf = NULL;
 880                 const char *o;
 881
 882                 if (m->parameters_fragment.options) {
 883                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 884                                 r = -ENOMEM;
 885                                 goto fail;
 886                         }
 887
 888                         o = buf;
 889                 } else
 890                         o = "remount";
 891
 892                 r = exec_command_set(
 893                                 m->control_command,
 894                                 "/bin/mount",
 895                                 m->parameters_fragment.what,
 896                                 m->where,
 897                                 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
 898                                 "-o", o,
 899                                 NULL);
 900
 901                 free(buf);
 902         } else if (m->from_etc_fstab)
 903                 r = exec_command_set(
 904                                 m->control_command,
 905                                 "/bin/mount",
 906                                 m->where,
 907                                 "-o", "remount",
 908                                 NULL);
 909         else
 910                 r = -ENOENT;
 911
 912         if (r < 0)
 913                 goto fail;
 914
 915         mount_unwatch_control_pid(m);
 916
 917         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 918                 goto fail;
 919
 920         mount_set_state(m, MOUNT_REMOUNTING);
 921
 922         return;
 923
 924 fail:
 925         log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
 926         m->reload_failure = true;
 927         mount_enter_mounted(m, true);
 928 }
 929
 930 static int mount_start(Unit *u) {
 931         Mount *m = MOUNT(u);
 932
 933         assert(m);
 934
 935         /* We cannot fulfill this request right now, try again later
 936          * please! */
 937         if (m->state == MOUNT_UNMOUNTING ||
 938             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 939             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 940             m->state == MOUNT_MOUNTING_SIGTERM ||
 941             m->state == MOUNT_MOUNTING_SIGKILL)
 942                 return -EAGAIN;
 943
 944         /* Already on it! */
 945         if (m->state == MOUNT_MOUNTING)
 946                 return 0;
 947
 948         assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
 949
 950         m->failure = false;
 951         mount_enter_mounting(m);
 952         return 0;
 953 }
 954
 955 static int mount_stop(Unit *u) {
 956         Mount *m = MOUNT(u);
 957
 958         assert(m);
 959
 960         /* Already on it */
 961         if (m->state == MOUNT_UNMOUNTING ||
 962             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 963             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 964             m->state == MOUNT_MOUNTING_SIGTERM ||
 965             m->state == MOUNT_MOUNTING_SIGKILL)
 966                 return 0;
 967
 968         assert(m->state == MOUNT_MOUNTING ||
 969                m->state == MOUNT_MOUNTING_DONE ||
 970                m->state == MOUNT_MOUNTED ||
 971                m->state == MOUNT_REMOUNTING ||
 972                m->state == MOUNT_REMOUNTING_SIGTERM ||
 973                m->state == MOUNT_REMOUNTING_SIGKILL);
 974
 975         mount_enter_unmounting(m, true);
 976         return 0;
 977 }
 978
 979 static int mount_reload(Unit *u) {
 980         Mount *m = MOUNT(u);
 981
 982         assert(m);
 983
 984         if (m->state == MOUNT_MOUNTING_DONE)
 985                 return -EAGAIN;
 986
 987         assert(m->state == MOUNT_MOUNTED);
 988
 989         mount_enter_remounting(m, true);
 990         return 0;
 991 }
 992
 993 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
 994         Mount *m = MOUNT(u);
 995
 996         assert(m);
 997         assert(f);
 998         assert(fds);
 999
1000         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1001         unit_serialize_item(u, f, "failure", yes_no(m->failure));
1002
1003         if (m->control_pid > 0)
1004                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1005
1006         if (m->control_command_id >= 0)
1007                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1008
1009         return 0;
1010 }
1011
1012 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1013         Mount *m = MOUNT(u);
1014
1015         assert(u);
1016         assert(key);
1017         assert(value);
1018         assert(fds);
1019
1020         if (streq(key, "state")) {
1021                 MountState state;
1022
1023                 if ((state = mount_state_from_string(value)) < 0)
1024                         log_debug("Failed to parse state value %s", value);
1025                 else
1026                         m->deserialized_state = state;
1027         } else if (streq(key, "failure")) {
1028                 int b;
1029
1030                 if ((b = parse_boolean(value)) < 0)
1031                         log_debug("Failed to parse failure value %s", value);
1032                 else
1033                         m->failure = b || m->failure;
1034
1035         } else if (streq(key, "control-pid")) {
1036                 pid_t pid;
1037
1038                 if (parse_pid(value, &pid) < 0)
1039                         log_debug("Failed to parse control-pid value %s", value);
1040                 else
1041                         m->control_pid = pid;
1042         } else if (streq(key, "control-command")) {
1043                 MountExecCommand id;
1044
1045                 if ((id = mount_exec_command_from_string(value)) < 0)
1046                         log_debug("Failed to parse exec-command value %s", value);
1047                 else {
1048                         m->control_command_id = id;
1049                         m->control_command = m->exec_command + id;
1050                 }
1051
1052         } else
1053                 log_debug("Unknown serialization key '%s'", key);
1054
1055         return 0;
1056 }
1057
1058 static UnitActiveState mount_active_state(Unit *u) {
1059         assert(u);
1060
1061         return state_translation_table[MOUNT(u)->state];
1062 }
1063
1064 static const char *mount_sub_state_to_string(Unit *u) {
1065         assert(u);
1066
1067         return mount_state_to_string(MOUNT(u)->state);
1068 }
1069
1070 static bool mount_check_gc(Unit *u) {
1071         Mount *m = MOUNT(u);
1072
1073         assert(m);
1074
1075         return m->from_etc_fstab || m->from_proc_self_mountinfo;
1076 }
1077
1078 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1079         Mount *m = MOUNT(u);
1080         bool success;
1081
1082         assert(m);
1083         assert(pid >= 0);
1084
1085         if (pid != m->control_pid)
1086                 return;
1087
1088         m->control_pid = 0;
1089
1090         success = is_clean_exit(code, status);
1091         m->failure = m->failure || !success;
1092
1093         if (m->control_command) {
1094                 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1095                 m->control_command = NULL;
1096                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1097         }
1098
1099         log_full(success ? LOG_DEBUG : LOG_NOTICE,
1100                  "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1101
1102         /* Note that mount(8) returning and the kernel sending us a
1103          * mount table change event might happen out-of-order. If an
1104          * operation succeed we assume the kernel will follow soon too
1105          * and already change into the resulting state.  If it fails
1106          * we check if the kernel still knows about the mount. and
1107          * change state accordingly. */
1108
1109         switch (m->state) {
1110
1111         case MOUNT_MOUNTING:
1112         case MOUNT_MOUNTING_DONE:
1113         case MOUNT_MOUNTING_SIGKILL:
1114         case MOUNT_MOUNTING_SIGTERM:
1115
1116                 if (success)
1117                         mount_enter_mounted(m, true);
1118                 else if (m->from_proc_self_mountinfo)
1119                         mount_enter_mounted(m, false);
1120                 else
1121                         mount_enter_dead(m, false);
1122                 break;
1123
1124         case MOUNT_REMOUNTING:
1125         case MOUNT_REMOUNTING_SIGKILL:
1126         case MOUNT_REMOUNTING_SIGTERM:
1127
1128                 m->reload_failure = !success;
1129                 if (m->from_proc_self_mountinfo)
1130                         mount_enter_mounted(m, true);
1131                 else
1132                         mount_enter_dead(m, true);
1133
1134                 break;
1135
1136         case MOUNT_UNMOUNTING:
1137         case MOUNT_UNMOUNTING_SIGKILL:
1138         case MOUNT_UNMOUNTING_SIGTERM:
1139
1140                 if (success)
1141                         mount_enter_dead(m, true);
1142                 else if (m->from_proc_self_mountinfo)
1143                         mount_enter_mounted(m, false);
1144                 else
1145                         mount_enter_dead(m, false);
1146                 break;
1147
1148         default:
1149                 assert_not_reached("Uh, control process died at wrong time.");
1150         }
1151
1152         /* Notify clients about changed exit status */
1153         unit_add_to_dbus_queue(u);
1154 }
1155
1156 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1157         Mount *m = MOUNT(u);
1158
1159         assert(m);
1160         assert(elapsed == 1);
1161         assert(w == &m->timer_watch);
1162
1163         switch (m->state) {
1164
1165         case MOUNT_MOUNTING:
1166         case MOUNT_MOUNTING_DONE:
1167                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1168                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1169                 break;
1170
1171         case MOUNT_REMOUNTING:
1172                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1173                 m->reload_failure = true;
1174                 mount_enter_mounted(m, true);
1175                 break;
1176
1177         case MOUNT_UNMOUNTING:
1178                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1179                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1180                 break;
1181
1182         case MOUNT_MOUNTING_SIGTERM:
1183                 if (m->exec_context.send_sigkill) {
1184                         log_warning("%s mounting timed out. Killing.", u->meta.id);
1185                         mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1186                 } else {
1187                         log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1188
1189                         if (m->from_proc_self_mountinfo)
1190                                 mount_enter_mounted(m, false);
1191                         else
1192                                 mount_enter_dead(m, false);
1193                 }
1194                 break;
1195
1196         case MOUNT_REMOUNTING_SIGTERM:
1197                 if (m->exec_context.send_sigkill) {
1198                         log_warning("%s remounting timed out. Killing.", u->meta.id);
1199                         mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1200                 } else {
1201                         log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1202
1203                         if (m->from_proc_self_mountinfo)
1204                                 mount_enter_mounted(m, false);
1205                         else
1206                                 mount_enter_dead(m, false);
1207                 }
1208                 break;
1209
1210         case MOUNT_UNMOUNTING_SIGTERM:
1211                 if (m->exec_context.send_sigkill) {
1212                         log_warning("%s unmounting timed out. Killing.", u->meta.id);
1213                         mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1214                 } else {
1215                         log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1216
1217                         if (m->from_proc_self_mountinfo)
1218                                 mount_enter_mounted(m, false);
1219                         else
1220                                 mount_enter_dead(m, false);
1221                 }
1222                 break;
1223
1224         case MOUNT_MOUNTING_SIGKILL:
1225         case MOUNT_REMOUNTING_SIGKILL:
1226         case MOUNT_UNMOUNTING_SIGKILL:
1227                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1228
1229                 if (m->from_proc_self_mountinfo)
1230                         mount_enter_mounted(m, false);
1231                 else
1232                         mount_enter_dead(m, false);
1233                 break;
1234
1235         default:
1236                 assert_not_reached("Timeout at wrong time.");
1237         }
1238 }
1239
1240 static int mount_add_one(
1241                 Manager *m,
1242                 const char *what,
1243                 const char *where,
1244                 const char *options,
1245                 const char *fstype,
1246                 int passno,
1247                 bool from_proc_self_mountinfo,
1248                 bool set_flags) {
1249         int r;
1250         Unit *u;
1251         bool delete;
1252         char *e, *w = NULL, *o = NULL, *f = NULL;
1253         MountParameters *p;
1254
1255         assert(m);
1256         assert(what);
1257         assert(where);
1258         assert(options);
1259         assert(fstype);
1260
1261         assert(!set_flags || from_proc_self_mountinfo);
1262
1263         /* Ignore API mount points. They should never be referenced in
1264          * dependencies ever. */
1265         if (mount_point_is_api(where))
1266                 return 0;
1267         if (mount_point_ignore(where))
1268                 return 0;
1269
1270         if (streq(fstype, "autofs"))
1271                 return 0;
1272
1273         /* probably some kind of swap, ignore */
1274         if (!is_path(where))
1275                 return 0;
1276
1277         if (!(e = unit_name_from_path(where, ".mount")))
1278                 return -ENOMEM;
1279
1280         if (!(u = manager_get_unit(m, e))) {
1281                 delete = true;
1282
1283                 if (!(u = unit_new(m))) {
1284                         free(e);
1285                         return -ENOMEM;
1286                 }
1287
1288                 r = unit_add_name(u, e);
1289                 free(e);
1290
1291                 if (r < 0)
1292                         goto fail;
1293
1294                 if (!(MOUNT(u)->where = strdup(where))) {
1295                         r = -ENOMEM;
1296                         goto fail;
1297                 }
1298
1299                 unit_add_to_load_queue(u);
1300         } else {
1301                 delete = false;
1302                 free(e);
1303         }
1304
1305         if (!(w = strdup(what)) ||
1306             !(o = strdup(options)) ||
1307             !(f = strdup(fstype))) {
1308                 r = -ENOMEM;
1309                 goto fail;
1310         }
1311
1312         if (from_proc_self_mountinfo) {
1313                 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1314
1315                 if (set_flags) {
1316                         MOUNT(u)->is_mounted = true;
1317                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1318                         MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1319                 }
1320
1321                 MOUNT(u)->from_proc_self_mountinfo = true;
1322         } else {
1323                 p = &MOUNT(u)->parameters_etc_fstab;
1324                 MOUNT(u)->from_etc_fstab = true;
1325         }
1326
1327         free(p->what);
1328         p->what = w;
1329
1330         free(p->options);
1331         p->options = o;
1332
1333         free(p->fstype);
1334         p->fstype = f;
1335
1336         p->passno = passno;
1337
1338         unit_add_to_dbus_queue(u);
1339
1340         return 0;
1341
1342 fail:
1343         free(w);
1344         free(o);
1345         free(f);
1346
1347         if (delete && u)
1348                 unit_free(u);
1349
1350         return r;
1351 }
1352
1353 static int mount_find_pri(char *options) {
1354         char *end, *pri;
1355         unsigned long r;
1356
1357         if (!(pri = mount_test_option(options, "pri=")))
1358                 return 0;
1359
1360         pri += 4;
1361
1362         errno = 0;
1363         r = strtoul(pri, &end, 10);
1364
1365         if (errno != 0)
1366                 return -errno;
1367
1368         if (end == pri || (*end != ',' && *end != 0))
1369                 return -EINVAL;
1370
1371         return (int) r;
1372 }
1373
1374 static int mount_load_etc_fstab(Manager *m) {
1375         FILE *f;
1376         int r = 0;
1377         struct mntent* me;
1378
1379         assert(m);
1380
1381         errno = 0;
1382         if (!(f = setmntent("/etc/fstab", "r")))
1383                 return -errno;
1384
1385         while ((me = getmntent(f))) {
1386                 char *where, *what;
1387                 int k;
1388
1389                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1390                         r = -ENOMEM;
1391                         goto finish;
1392                 }
1393
1394                 if (!(where = strdup(me->mnt_dir))) {
1395                         free(what);
1396                         r = -ENOMEM;
1397                         goto finish;
1398                 }
1399
1400                 if (what[0] == '/')
1401                         path_kill_slashes(what);
1402
1403                 if (where[0] == '/')
1404                         path_kill_slashes(where);
1405
1406                 if (streq(me->mnt_type, "swap")) {
1407                         int pri;
1408
1409                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1410                                 k = pri;
1411                         else
1412                                 k = swap_add_one(m,
1413                                                  what,
1414                                                  NULL,
1415                                                  pri,
1416                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1417                                                  !!mount_test_option(me->mnt_opts, "nofail"),
1418                                                  !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1419                                                  false);
1420                 } else
1421                         k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1422
1423                 free(what);
1424                 free(where);
1425
1426                 if (r < 0)
1427                         r = k;
1428         }
1429
1430 finish:
1431
1432         endmntent(f);
1433         return r;
1434 }
1435
1436 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1437         int r = 0;
1438         unsigned i;
1439         char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1440
1441         assert(m);
1442
1443         rewind(m->proc_self_mountinfo);
1444
1445         for (i = 1;; i++) {
1446                 int k;
1447
1448                 device = path = options = options2 = fstype = d = p = o = NULL;
1449
1450                 if ((k = fscanf(m->proc_self_mountinfo,
1451                                 "%*s "       /* (1) mount id */
1452                                 "%*s "       /* (2) parent id */
1453                                 "%*s "       /* (3) major:minor */
1454                                 "%*s "       /* (4) root */
1455                                 "%ms "       /* (5) mount point */
1456                                 "%ms"        /* (6) mount options */
1457                                 "%*[^-]"     /* (7) optional fields */
1458                                 "- "         /* (8) separator */
1459                                 "%ms "       /* (9) file system type */
1460                                 "%ms"        /* (10) mount source */
1461                                 "%ms"        /* (11) mount options 2 */
1462                                 "%*[^\n]",   /* some rubbish at the end */
1463                                 &path,
1464                                 &options,
1465                                 &fstype,
1466                                 &device,
1467                                 &options2)) != 5) {
1468
1469                         if (k == EOF)
1470                                 break;
1471
1472                         log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1473                         goto clean_up;
1474                 }
1475
1476                 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1477                         r = -ENOMEM;
1478                         goto finish;
1479                 }
1480
1481                 if (!(d = cunescape(device)) ||
1482                     !(p = cunescape(path))) {
1483                         r = -ENOMEM;
1484                         goto finish;
1485                 }
1486
1487                 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1488                         r = k;
1489
1490 clean_up:
1491                 free(device);
1492                 free(path);
1493                 free(options);
1494                 free(options2);
1495                 free(fstype);
1496                 free(d);
1497                 free(p);
1498                 free(o);
1499         }
1500
1501 finish:
1502         free(device);
1503         free(path);
1504         free(options);
1505         free(options2);
1506         free(fstype);
1507         free(d);
1508         free(p);
1509         free(o);
1510
1511         return r;
1512 }
1513
1514 static void mount_shutdown(Manager *m) {
1515         assert(m);
1516
1517         if (m->proc_self_mountinfo) {
1518                 fclose(m->proc_self_mountinfo);
1519                 m->proc_self_mountinfo = NULL;
1520         }
1521 }
1522
1523 static int mount_enumerate(Manager *m) {
1524         int r;
1525         struct epoll_event ev;
1526         assert(m);
1527
1528         if (!m->proc_self_mountinfo) {
1529                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1530                         return -errno;
1531
1532                 m->mount_watch.type = WATCH_MOUNT;
1533                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1534
1535                 zero(ev);
1536                 ev.events = EPOLLPRI;
1537                 ev.data.ptr = &m->mount_watch;
1538
1539                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1540                         return -errno;
1541         }
1542
1543         if ((r = mount_load_etc_fstab(m)) < 0)
1544                 goto fail;
1545
1546         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1547                 goto fail;
1548
1549         return 0;
1550
1551 fail:
1552         mount_shutdown(m);
1553         return r;
1554 }
1555
1556 void mount_fd_event(Manager *m, int events) {
1557         Meta *meta;
1558         int r;
1559
1560         assert(m);
1561         assert(events & EPOLLPRI);
1562
1563         /* The manager calls this for every fd event happening on the
1564          * /proc/self/mountinfo file, which informs us about mounting
1565          * table changes */
1566
1567         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1568                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1569
1570                 /* Reset flags, just in case, for later calls */
1571                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1572                         Mount *mount = (Mount*) meta;
1573
1574                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1575                 }
1576
1577                 return;
1578         }
1579
1580         manager_dispatch_load_queue(m);
1581
1582         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1583                 Mount *mount = (Mount*) meta;
1584
1585                 if (!mount->is_mounted) {
1586                         /* This has just been unmounted. */
1587
1588                         mount->from_proc_self_mountinfo = false;
1589
1590                         switch (mount->state) {
1591
1592                         case MOUNT_MOUNTED:
1593                                 mount_enter_dead(mount, true);
1594                                 break;
1595
1596                         default:
1597                                 mount_set_state(mount, mount->state);
1598                                 break;
1599
1600                         }
1601
1602                 } else if (mount->just_mounted || mount->just_changed) {
1603
1604                         /* New or changed mount entry */
1605
1606                         switch (mount->state) {
1607
1608                         case MOUNT_DEAD:
1609                         case MOUNT_FAILED:
1610                                 mount_enter_mounted(mount, true);
1611                                 break;
1612
1613                         case MOUNT_MOUNTING:
1614                                 mount_enter_mounting_done(mount);
1615                                 break;
1616
1617                         default:
1618                                 /* Nothing really changed, but let's
1619                                  * issue an notification call
1620                                  * nonetheless, in case somebody is
1621                                  * waiting for this. (e.g. file system
1622                                  * ro/rw remounts.) */
1623                                 mount_set_state(mount, mount->state);
1624                                 break;
1625                         }
1626                 }
1627
1628                 /* Reset the flags for later calls */
1629                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1630         }
1631 }
1632
1633 static void mount_reset_failed(Unit *u) {
1634         Mount *m = MOUNT(u);
1635
1636         assert(m);
1637
1638         if (m->state == MOUNT_FAILED)
1639                 mount_set_state(m, MOUNT_DEAD);
1640
1641         m->failure = false;
1642 }
1643
1644 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1645         Mount *m = MOUNT(u);
1646         int r = 0;
1647         Set *pid_set = NULL;
1648
1649         assert(m);
1650
1651         if (who == KILL_MAIN) {
1652                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1653                 return -EINVAL;
1654         }
1655
1656         if (m->control_pid <= 0 && who == KILL_CONTROL) {
1657                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1658                 return -ENOENT;
1659         }
1660
1661         if (m->control_pid > 0)
1662                 if (kill(mode == KILL_PROCESS_GROUP ? -m->control_pid : m->control_pid, signo) < 0)
1663                         r = -errno;
1664
1665         if (mode == KILL_CONTROL_GROUP) {
1666                 int q;
1667
1668                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1669                         return -ENOMEM;
1670
1671                 /* Exclude the control pid from being killed via the cgroup */
1672                 if (m->control_pid > 0)
1673                         if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1674                                 r = q;
1675                                 goto finish;
1676                         }
1677
1678                 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, pid_set)) < 0)
1679                         if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1680                                 r = q;
1681         }
1682
1683 finish:
1684         if (pid_set)
1685                 set_free(pid_set);
1686
1687         return r;
1688 }
1689
1690 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1691         [MOUNT_DEAD] = "dead",
1692         [MOUNT_MOUNTING] = "mounting",
1693         [MOUNT_MOUNTING_DONE] = "mounting-done",
1694         [MOUNT_MOUNTED] = "mounted",
1695         [MOUNT_REMOUNTING] = "remounting",
1696         [MOUNT_UNMOUNTING] = "unmounting",
1697         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1698         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1699         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1700         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1701         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1702         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1703         [MOUNT_FAILED] = "failed"
1704 };
1705
1706 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1707
1708 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1709         [MOUNT_EXEC_MOUNT] = "ExecMount",
1710         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1711         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1712 };
1713
1714 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1715
1716 const UnitVTable mount_vtable = {
1717         .suffix = ".mount",
1718
1719         .no_alias = true,
1720         .no_instances = true,
1721         .no_isolate = true,
1722         .show_status = true,
1723
1724         .init = mount_init,
1725         .load = mount_load,
1726         .done = mount_done,
1727
1728         .coldplug = mount_coldplug,
1729
1730         .dump = mount_dump,
1731
1732         .start = mount_start,
1733         .stop = mount_stop,
1734         .reload = mount_reload,
1735
1736         .kill = mount_kill,
1737
1738         .serialize = mount_serialize,
1739         .deserialize_item = mount_deserialize_item,
1740
1741         .active_state = mount_active_state,
1742         .sub_state_to_string = mount_sub_state_to_string,
1743
1744         .check_gc = mount_check_gc,
1745
1746         .sigchld_event = mount_sigchld_event,
1747         .timer_event = mount_timer_event,
1748
1749         .reset_failed = mount_reset_failed,
1750
1751         .bus_interface = "org.freedesktop.systemd1.Mount",
1752         .bus_message_handler = bus_mount_message_handler,
1753         .bus_invalidating_properties =  bus_mount_invalidating_properties,
1754
1755         .enumerate = mount_enumerate,
1756         .shutdown = mount_shutdown
1757 };