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