src/mount.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <stdio.h>
  24 #include <mntent.h>
  25 #include <sys/epoll.h>
  26 #include <signal.h>
  27
  28 #include "unit.h"
  29 #include "mount.h"
  30 #include "load-fragment.h"
  31 #include "load-dropin.h"
  32 #include "log.h"
  33 #include "strv.h"
  34 #include "mount-setup.h"
  35 #include "unit-name.h"
  36 #include "dbus-mount.h"
  37 #include "special.h"
  38 #include "bus-errors.h"
  39 #include "exit-status.h"
  40 #include "def.h"
  41
  42 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
  43         [MOUNT_DEAD] = UNIT_INACTIVE,
  44         [MOUNT_MOUNTING] = UNIT_ACTIVATING,
  45         [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
  46         [MOUNT_MOUNTED] = UNIT_ACTIVE,
  47         [MOUNT_REMOUNTING] = UNIT_RELOADING,
  48         [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
  49         [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  50         [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  51         [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
  52         [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
  53         [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  54         [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  55         [MOUNT_FAILED] = UNIT_FAILED
  56 };
  57
  58 static void mount_init(Unit *u) {
  59         Mount *m = MOUNT(u);
  60
  61         assert(u);
  62         assert(u->meta.load_state == UNIT_STUB);
  63
  64         m->timeout_usec = DEFAULT_TIMEOUT_USEC;
  65         m->directory_mode = 0755;
  66
  67         exec_context_init(&m->exec_context);
  68         m->exec_context.std_output = EXEC_OUTPUT_KMSG;
  69
  70         /* We need to make sure that /bin/mount is always called in
  71          * the same process group as us, so that the autofs kernel
  72          * side doesn't send us another mount request while we are
  73          * already trying to comply its last one. */
  74         m->exec_context.same_pgrp = true;
  75
  76         m->timer_watch.type = WATCH_INVALID;
  77
  78         m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
  79 }
  80
  81 static void mount_unwatch_control_pid(Mount *m) {
  82         assert(m);
  83
  84         if (m->control_pid <= 0)
  85                 return;
  86
  87         unit_unwatch_pid(UNIT(m), m->control_pid);
  88         m->control_pid = 0;
  89 }
  90
  91 static void mount_parameters_done(MountParameters *p) {
  92         assert(p);
  93
  94         free(p->what);
  95         free(p->options);
  96         free(p->fstype);
  97
  98         p->what = p->options = p->fstype = NULL;
  99 }
 100
 101 static void mount_done(Unit *u) {
 102         Mount *m = MOUNT(u);
 103         Meta *other;
 104
 105         assert(m);
 106
 107         free(m->where);
 108         m->where = NULL;
 109
 110         /* Try to detach us from the automount unit if there is any */
 111         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT]) {
 112                 Automount *a = (Automount*) other;
 113
 114                 if (a->mount == m)
 115                         a->mount = NULL;
 116         }
 117
 118         mount_parameters_done(&m->parameters_etc_fstab);
 119         mount_parameters_done(&m->parameters_proc_self_mountinfo);
 120         mount_parameters_done(&m->parameters_fragment);
 121
 122         exec_context_done(&m->exec_context);
 123         exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
 124         m->control_command = NULL;
 125
 126         mount_unwatch_control_pid(m);
 127
 128         unit_unwatch_timer(u, &m->timer_watch);
 129 }
 130
 131 static MountParameters* get_mount_parameters_configured(Mount *m) {
 132         assert(m);
 133
 134         if (m->from_fragment)
 135                 return &m->parameters_fragment;
 136         else if (m->from_etc_fstab)
 137                 return &m->parameters_etc_fstab;
 138
 139         return NULL;
 140 }
 141
 142 static MountParameters* get_mount_parameters(Mount *m) {
 143         assert(m);
 144
 145         if (m->from_proc_self_mountinfo)
 146                 return &m->parameters_proc_self_mountinfo;
 147
 148         return get_mount_parameters_configured(m);
 149 }
 150
 151 static int mount_add_mount_links(Mount *m) {
 152         Meta *other;
 153         int r;
 154         MountParameters *pm;
 155
 156         assert(m);
 157
 158         pm = get_mount_parameters_configured(m);
 159
 160         /* Adds in links to other mount points that might lie below or
 161          * above us in the hierarchy */
 162
 163         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
 164                 Mount *n = (Mount*) other;
 165                 MountParameters *pn;
 166
 167                 if (n == m)
 168                         continue;
 169
 170                 if (n->meta.load_state != UNIT_LOADED)
 171                         continue;
 172
 173                 pn = get_mount_parameters_configured(n);
 174
 175                 if (path_startswith(m->where, n->where)) {
 176
 177                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 178                                 return r;
 179
 180                         if (pn)
 181                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 182                                         return r;
 183
 184                 } else if (path_startswith(n->where, m->where)) {
 185
 186                         if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
 187                                 return r;
 188
 189                         if (pm)
 190                                 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 191                                         return r;
 192
 193                 } else if (pm && path_startswith(pm->what, n->where)) {
 194
 195                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 196                                 return r;
 197
 198                         if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 199                                 return r;
 200
 201                 } else if (pn && path_startswith(pn->what, m->where)) {
 202
 203                         if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
 204                                 return r;
 205
 206                         if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 207                                 return r;
 208                 }
 209         }
 210
 211         return 0;
 212 }
 213
 214 static int mount_add_swap_links(Mount *m) {
 215         Meta *other;
 216         int r;
 217
 218         assert(m);
 219
 220         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
 221                 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
 222                         return r;
 223
 224         return 0;
 225 }
 226
 227 static int mount_add_path_links(Mount *m) {
 228         Meta *other;
 229         int r;
 230
 231         assert(m);
 232
 233         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
 234                 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
 235                         return r;
 236
 237         return 0;
 238 }
 239
 240 static int mount_add_automount_links(Mount *m) {
 241         Meta *other;
 242         int r;
 243
 244         assert(m);
 245
 246         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
 247                 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
 248                         return r;
 249
 250         return 0;
 251 }
 252
 253 static int mount_add_socket_links(Mount *m) {
 254         Meta *other;
 255         int r;
 256
 257         assert(m);
 258
 259         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
 260                 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
 261                         return r;
 262
 263         return 0;
 264 }
 265
 266 static char* mount_test_option(const char *haystack, const char *needle) {
 267         struct mntent me;
 268
 269         assert(needle);
 270
 271         /* Like glibc's hasmntopt(), but works on a string, not a
 272          * struct mntent */
 273
 274         if (!haystack)
 275                 return false;
 276
 277         zero(me);
 278         me.mnt_opts = (char*) haystack;
 279
 280         return hasmntopt(&me, needle);
 281 }
 282
 283 static bool mount_is_network(MountParameters *p) {
 284         assert(p);
 285
 286         if (mount_test_option(p->options, "_netdev"))
 287                 return true;
 288
 289         if (p->fstype && fstype_is_network(p->fstype))
 290                 return true;
 291
 292         return false;
 293 }
 294
 295 static bool mount_is_bind(MountParameters *p) {
 296         assert(p);
 297
 298         if (mount_test_option(p->options, "bind"))
 299                 return true;
 300
 301         if (p->fstype && streq(p->fstype, "bind"))
 302                 return true;
 303
 304         return false;
 305 }
 306
 307 static bool needs_quota(MountParameters *p) {
 308         assert(p);
 309
 310         if (mount_is_network(p))
 311                 return false;
 312
 313         if (mount_is_bind(p))
 314                 return false;
 315
 316         return mount_test_option(p->options, "usrquota") ||
 317                 mount_test_option(p->options, "grpquota");
 318 }
 319
 320 static int mount_add_target_links(Mount *m) {
 321         const char *target, *after = NULL;
 322         MountParameters *p;
 323         Unit *tu;
 324         int r;
 325         bool noauto, nofail, handle, automount;
 326
 327         assert(m);
 328
 329         if (!(p = get_mount_parameters_configured(m)))
 330                 return 0;
 331
 332         noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 333         nofail = !!mount_test_option(p->options, "nofail");
 334         handle =
 335                 mount_test_option(p->options, "comment=systemd.mount") ||
 336                 mount_test_option(p->options, "x-systemd-mount") ||
 337                 m->meta.manager->mount_auto;
 338         automount =
 339                 mount_test_option(p->options, "comment=systemd.automount") ||
 340                 mount_test_option(p->options, "x-systemd-automount");
 341
 342         if (mount_is_network(p)) {
 343                 target = SPECIAL_REMOTE_FS_TARGET;
 344
 345                 if (m->meta.manager->running_as == MANAGER_SYSTEM)
 346                         after = SPECIAL_NETWORK_TARGET;
 347         } else
 348                 target = SPECIAL_LOCAL_FS_TARGET;
 349
 350         if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
 351                 return r;
 352
 353         if (after)
 354                 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
 355                         return r;
 356
 357         if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
 358                 Unit *am;
 359
 360                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
 361                         return r;
 362
 363                 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
 364         } else {
 365
 366                 /* Automatically add mount points that aren't natively
 367                  * configured to local-fs.target */
 368                 if (!noauto &&
 369                     !nofail &&
 370                     handle &&
 371                     m->from_etc_fstab &&
 372                     m->meta.manager->running_as == MANAGER_SYSTEM)
 373                         if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
 374                                 return r;
 375
 376                 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
 377         }
 378 }
 379
 380 static int mount_add_device_links(Mount *m) {
 381         MountParameters *p;
 382         int r;
 383
 384         assert(m);
 385
 386         if (!(p = get_mount_parameters_configured(m)))
 387                 return 0;
 388
 389         if (!p->what)
 390                 return 0;
 391
 392         if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
 393                 bool nofail, noauto;
 394
 395                 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 396                 nofail = !!mount_test_option(p->options, "nofail");
 397
 398                 if ((r = unit_add_node_link(UNIT(m), p->what,
 399                                             !noauto && nofail &&
 400                                             UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
 401                         return r;
 402         }
 403
 404         if (p->passno > 0 &&
 405             !mount_is_bind(p) &&
 406             UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
 407             !path_equal(m->where, "/")) {
 408                 char *name;
 409                 Unit *fsck;
 410                 /* Let's add in the fsck service */
 411
 412                 /* aka SPECIAL_FSCK_SERVICE */
 413                 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
 414                         return -ENOMEM;
 415
 416                 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
 417                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
 418                         free(name);
 419                         return r;
 420                 }
 421
 422                 free(name);
 423
 424                 SERVICE(fsck)->fsck_passno = p->passno;
 425
 426                 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
 427                         return r;
 428         }
 429
 430         return 0;
 431 }
 432
 433 static int mount_add_default_dependencies(Mount *m) {
 434         int r;
 435
 436         assert(m);
 437
 438         if (m->meta.manager->running_as == MANAGER_SYSTEM &&
 439             !path_equal(m->where, "/")) {
 440                 MountParameters *p;
 441
 442                 p = get_mount_parameters_configured(m);
 443
 444                 if (p && needs_quota(p)) {
 445                         if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
 446                             (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
 447                                 return r;
 448                 }
 449
 450                 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
 451                         return r;
 452         }
 453
 454         return 0;
 455 }
 456
 457 static int mount_verify(Mount *m) {
 458         bool b;
 459         char *e;
 460         assert(m);
 461
 462         if (m->meta.load_state != UNIT_LOADED)
 463                 return 0;
 464
 465         if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
 466                 return -ENOENT;
 467
 468         if (!(e = unit_name_from_path(m->where, ".mount")))
 469                 return -ENOMEM;
 470
 471         b = unit_has_name(UNIT(m), e);
 472         free(e);
 473
 474         if (!b) {
 475                 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
 476                 return -EINVAL;
 477         }
 478
 479         if (m->meta.fragment_path && !m->parameters_fragment.what) {
 480                 log_error("%s's What setting is missing. Refusing.", m->meta.id);
 481                 return -EBADMSG;
 482         }
 483
 484         if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 485                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
 486                 return -EINVAL;
 487         }
 488
 489         return 0;
 490 }
 491
 492 static int mount_load(Unit *u) {
 493         Mount *m = MOUNT(u);
 494         int r;
 495
 496         assert(u);
 497         assert(u->meta.load_state == UNIT_STUB);
 498
 499         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
 500                 return r;
 501
 502         /* This is a new unit? Then let's add in some extras */
 503         if (u->meta.load_state == UNIT_LOADED) {
 504                 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
 505                         return r;
 506
 507                 if (m->meta.fragment_path)
 508                         m->from_fragment = true;
 509
 510                 if (!m->where)
 511                         if (!(m->where = unit_name_to_path(u->meta.id)))
 512                                 return -ENOMEM;
 513
 514                 path_kill_slashes(m->where);
 515
 516                 if (!m->meta.description)
 517                         if ((r = unit_set_description(u, m->where)) < 0)
 518                                 return r;
 519
 520                 if ((r = mount_add_device_links(m)) < 0)
 521                         return r;
 522
 523                 if ((r = mount_add_mount_links(m)) < 0)
 524                         return r;
 525
 526                 if ((r = mount_add_socket_links(m)) < 0)
 527                         return r;
 528
 529                 if ((r = mount_add_swap_links(m)) < 0)
 530                         return r;
 531
 532                 if ((r = mount_add_path_links(m)) < 0)
 533                         return r;
 534
 535                 if ((r = mount_add_automount_links(m)) < 0)
 536                         return r;
 537
 538                 if ((r = mount_add_target_links(m)) < 0)
 539                         return r;
 540
 541                 if ((r = unit_add_default_cgroups(u)) < 0)
 542                         return r;
 543
 544                 if (m->meta.default_dependencies)
 545                         if ((r = mount_add_default_dependencies(m)) < 0)
 546                                 return r;
 547         }
 548
 549         return mount_verify(m);
 550 }
 551
 552 static int mount_notify_automount(Mount *m, int status) {
 553         Unit *p;
 554         int r;
 555
 556         assert(m);
 557
 558         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
 559                 return r == -ENOENT ? 0 : r;
 560
 561         return automount_send_ready(AUTOMOUNT(p), status);
 562 }
 563
 564 static void mount_set_state(Mount *m, MountState state) {
 565         MountState old_state;
 566         assert(m);
 567
 568         old_state = m->state;
 569         m->state = state;
 570
 571         if (state != MOUNT_MOUNTING &&
 572             state != MOUNT_MOUNTING_DONE &&
 573             state != MOUNT_REMOUNTING &&
 574             state != MOUNT_UNMOUNTING &&
 575             state != MOUNT_MOUNTING_SIGTERM &&
 576             state != MOUNT_MOUNTING_SIGKILL &&
 577             state != MOUNT_UNMOUNTING_SIGTERM &&
 578             state != MOUNT_UNMOUNTING_SIGKILL &&
 579             state != MOUNT_REMOUNTING_SIGTERM &&
 580             state != MOUNT_REMOUNTING_SIGKILL) {
 581                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
 582                 mount_unwatch_control_pid(m);
 583                 m->control_command = NULL;
 584                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 585         }
 586
 587         if (state == MOUNT_MOUNTED ||
 588             state == MOUNT_REMOUNTING)
 589                 mount_notify_automount(m, 0);
 590         else if (state == MOUNT_DEAD ||
 591                  state == MOUNT_UNMOUNTING ||
 592                  state == MOUNT_MOUNTING_SIGTERM ||
 593                  state == MOUNT_MOUNTING_SIGKILL ||
 594                  state == MOUNT_REMOUNTING_SIGTERM ||
 595                  state == MOUNT_REMOUNTING_SIGKILL ||
 596                  state == MOUNT_UNMOUNTING_SIGTERM ||
 597                  state == MOUNT_UNMOUNTING_SIGKILL ||
 598                  state == MOUNT_FAILED)
 599                 mount_notify_automount(m, -ENODEV);
 600
 601         if (state != old_state)
 602                 log_debug("%s changed %s -> %s",
 603                           m->meta.id,
 604                           mount_state_to_string(old_state),
 605                           mount_state_to_string(state));
 606
 607         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
 608         m->reload_failure = false;
 609 }
 610
 611 static int mount_coldplug(Unit *u) {
 612         Mount *m = MOUNT(u);
 613         MountState new_state = MOUNT_DEAD;
 614         int r;
 615
 616         assert(m);
 617         assert(m->state == MOUNT_DEAD);
 618
 619         if (m->deserialized_state != m->state)
 620                 new_state = m->deserialized_state;
 621         else if (m->from_proc_self_mountinfo)
 622                 new_state = MOUNT_MOUNTED;
 623
 624         if (new_state != m->state) {
 625
 626                 if (new_state == MOUNT_MOUNTING ||
 627                     new_state == MOUNT_MOUNTING_DONE ||
 628                     new_state == MOUNT_REMOUNTING ||
 629                     new_state == MOUNT_UNMOUNTING ||
 630                     new_state == MOUNT_MOUNTING_SIGTERM ||
 631                     new_state == MOUNT_MOUNTING_SIGKILL ||
 632                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
 633                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
 634                     new_state == MOUNT_REMOUNTING_SIGTERM ||
 635                     new_state == MOUNT_REMOUNTING_SIGKILL) {
 636
 637                         if (m->control_pid <= 0)
 638                                 return -EBADMSG;
 639
 640                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
 641                                 return r;
 642
 643                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 644                                 return r;
 645                 }
 646
 647                 mount_set_state(m, new_state);
 648         }
 649
 650         return 0;
 651 }
 652
 653 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
 654         Mount *m = MOUNT(u);
 655         MountParameters *p;
 656
 657         assert(m);
 658         assert(f);
 659
 660         p = get_mount_parameters(m);
 661
 662         fprintf(f,
 663                 "%sMount State: %s\n"
 664                 "%sWhere: %s\n"
 665                 "%sWhat: %s\n"
 666                 "%sFile System Type: %s\n"
 667                 "%sOptions: %s\n"
 668                 "%sFrom /etc/fstab: %s\n"
 669                 "%sFrom /proc/self/mountinfo: %s\n"
 670                 "%sFrom fragment: %s\n"
 671                 "%sDirectoryMode: %04o\n",
 672                 prefix, mount_state_to_string(m->state),
 673                 prefix, m->where,
 674                 prefix, strna(p->what),
 675                 prefix, strna(p->fstype),
 676                 prefix, strna(p->options),
 677                 prefix, yes_no(m->from_etc_fstab),
 678                 prefix, yes_no(m->from_proc_self_mountinfo),
 679                 prefix, yes_no(m->from_fragment),
 680                 prefix, m->directory_mode);
 681
 682         if (m->control_pid > 0)
 683                 fprintf(f,
 684                         "%sControl PID: %lu\n",
 685                         prefix, (unsigned long) m->control_pid);
 686
 687         exec_context_dump(&m->exec_context, f, prefix);
 688 }
 689
 690 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 691         pid_t pid;
 692         int r;
 693
 694         assert(m);
 695         assert(c);
 696         assert(_pid);
 697
 698         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 699                 goto fail;
 700
 701         if ((r = exec_spawn(c,
 702                             NULL,
 703                             &m->exec_context,
 704                             NULL, 0,
 705                             m->meta.manager->environment,
 706                             true,
 707                             true,
 708                             true,
 709                             m->meta.manager->confirm_spawn,
 710                             m->meta.cgroup_bondings,
 711                             &pid)) < 0)
 712                 goto fail;
 713
 714         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 715                 /* FIXME: we need to do something here */
 716                 goto fail;
 717
 718         *_pid = pid;
 719
 720         return 0;
 721
 722 fail:
 723         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 724
 725         return r;
 726 }
 727
 728 static void mount_enter_dead(Mount *m, bool success) {
 729         assert(m);
 730
 731         if (!success)
 732                 m->failure = true;
 733
 734         mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
 735 }
 736
 737 static void mount_enter_mounted(Mount *m, bool success) {
 738         assert(m);
 739
 740         if (!success)
 741                 m->failure = true;
 742
 743         mount_set_state(m, MOUNT_MOUNTED);
 744 }
 745
 746 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 747         int r;
 748         Set *pid_set = NULL;
 749         bool wait_for_exit = false;
 750
 751         assert(m);
 752
 753         if (!success)
 754                 m->failure = true;
 755
 756         if (m->exec_context.kill_mode != KILL_NONE) {
 757                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 758                            state == MOUNT_UNMOUNTING_SIGTERM ||
 759                            state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
 760
 761                 if (m->control_pid > 0) {
 762                         if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
 763
 764                                 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
 765                         else
 766                                 wait_for_exit = true;
 767                 }
 768
 769                 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
 770
 771                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
 772                                 r = -ENOMEM;
 773                                 goto fail;
 774                         }
 775
 776                         /* Exclude the control pid from being killed via the cgroup */
 777                         if (m->control_pid > 0)
 778                                 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
 779                                         goto fail;
 780
 781                         if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
 782                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
 783                                         log_warning("Failed to kill control group: %s", strerror(-r));
 784                         } else if (r > 0)
 785                                 wait_for_exit = true;
 786
 787                         set_free(pid_set);
 788                         pid_set = NULL;
 789                 }
 790         }
 791
 792         if (wait_for_exit) {
 793                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 794                         goto fail;
 795
 796                 mount_set_state(m, state);
 797         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 798                 mount_enter_mounted(m, true);
 799         else
 800                 mount_enter_dead(m, true);
 801
 802         return;
 803
 804 fail:
 805         log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
 806
 807         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 808                 mount_enter_mounted(m, false);
 809         else
 810                 mount_enter_dead(m, false);
 811
 812         if (pid_set)
 813                 set_free(pid_set);
 814 }
 815
 816 static void mount_enter_unmounting(Mount *m, bool success) {
 817         int r;
 818
 819         assert(m);
 820
 821         if (!success)
 822                 m->failure = true;
 823
 824         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 825         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 826
 827         if ((r = exec_command_set(
 828                              m->control_command,
 829                              "/bin/umount",
 830                              m->where,
 831                              NULL)) < 0)
 832                 goto fail;
 833
 834         mount_unwatch_control_pid(m);
 835
 836         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 837                 goto fail;
 838
 839         mount_set_state(m, MOUNT_UNMOUNTING);
 840
 841         return;
 842
 843 fail:
 844         log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
 845         mount_enter_mounted(m, false);
 846 }
 847
 848 static void mount_enter_mounting(Mount *m) {
 849         int r;
 850         MountParameters *p;
 851
 852         assert(m);
 853
 854         m->control_command_id = MOUNT_EXEC_MOUNT;
 855         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 856
 857         mkdir_p(m->where, m->directory_mode);
 858
 859         /* Create the source directory for bind-mounts if needed */
 860         p = get_mount_parameters_configured(m);
 861         if (p && mount_is_bind(p))
 862                 mkdir_p(p->what, m->directory_mode);
 863
 864         if (m->from_fragment)
 865                 r = exec_command_set(
 866                                 m->control_command,
 867                                 "/bin/mount",
 868                                 m->parameters_fragment.what,
 869                                 m->where,
 870                                 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
 871                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 872                                 NULL);
 873         else if (m->from_etc_fstab)
 874                 r = exec_command_set(
 875                                 m->control_command,
 876                                 "/bin/mount",
 877                                 m->where,
 878                                 NULL);
 879         else
 880                 r = -ENOENT;
 881
 882         if (r < 0)
 883                 goto fail;
 884
 885         mount_unwatch_control_pid(m);
 886
 887         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 888                 goto fail;
 889
 890         mount_set_state(m, MOUNT_MOUNTING);
 891
 892         return;
 893
 894 fail:
 895         log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
 896         mount_enter_dead(m, false);
 897 }
 898
 899 static void mount_enter_mounting_done(Mount *m) {
 900         assert(m);
 901
 902         mount_set_state(m, MOUNT_MOUNTING_DONE);
 903 }
 904
 905 static void mount_enter_remounting(Mount *m, bool success) {
 906         int r;
 907
 908         assert(m);
 909
 910         if (!success)
 911                 m->failure = true;
 912
 913         m->control_command_id = MOUNT_EXEC_REMOUNT;
 914         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 915
 916         if (m->from_fragment) {
 917                 char *buf = NULL;
 918                 const char *o;
 919
 920                 if (m->parameters_fragment.options) {
 921                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 922                                 r = -ENOMEM;
 923                                 goto fail;
 924                         }
 925
 926                         o = buf;
 927                 } else
 928                         o = "remount";
 929
 930                 r = exec_command_set(
 931                                 m->control_command,
 932                                 "/bin/mount",
 933                                 m->parameters_fragment.what,
 934                                 m->where,
 935                                 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
 936                                 "-o", o,
 937                                 NULL);
 938
 939                 free(buf);
 940         } else if (m->from_etc_fstab)
 941                 r = exec_command_set(
 942                                 m->control_command,
 943                                 "/bin/mount",
 944                                 m->where,
 945                                 "-o", "remount",
 946                                 NULL);
 947         else
 948                 r = -ENOENT;
 949
 950         if (r < 0)
 951                 goto fail;
 952
 953         mount_unwatch_control_pid(m);
 954
 955         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 956                 goto fail;
 957
 958         mount_set_state(m, MOUNT_REMOUNTING);
 959
 960         return;
 961
 962 fail:
 963         log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
 964         m->reload_failure = true;
 965         mount_enter_mounted(m, true);
 966 }
 967
 968 static int mount_start(Unit *u) {
 969         Mount *m = MOUNT(u);
 970
 971         assert(m);
 972
 973         /* We cannot fulfill this request right now, try again later
 974          * please! */
 975         if (m->state == MOUNT_UNMOUNTING ||
 976             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 977             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 978             m->state == MOUNT_MOUNTING_SIGTERM ||
 979             m->state == MOUNT_MOUNTING_SIGKILL)
 980                 return -EAGAIN;
 981
 982         /* Already on it! */
 983         if (m->state == MOUNT_MOUNTING)
 984                 return 0;
 985
 986         assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
 987
 988         m->failure = false;
 989         mount_enter_mounting(m);
 990         return 0;
 991 }
 992
 993 static int mount_stop(Unit *u) {
 994         Mount *m = MOUNT(u);
 995
 996         assert(m);
 997
 998         /* Already on it */
 999         if (m->state == MOUNT_UNMOUNTING ||
1000             m->state == MOUNT_UNMOUNTING_SIGKILL ||
1001             m->state == MOUNT_UNMOUNTING_SIGTERM ||
1002             m->state == MOUNT_MOUNTING_SIGTERM ||
1003             m->state == MOUNT_MOUNTING_SIGKILL)
1004                 return 0;
1005
1006         assert(m->state == MOUNT_MOUNTING ||
1007                m->state == MOUNT_MOUNTING_DONE ||
1008                m->state == MOUNT_MOUNTED ||
1009                m->state == MOUNT_REMOUNTING ||
1010                m->state == MOUNT_REMOUNTING_SIGTERM ||
1011                m->state == MOUNT_REMOUNTING_SIGKILL);
1012
1013         mount_enter_unmounting(m, true);
1014         return 0;
1015 }
1016
1017 static int mount_reload(Unit *u) {
1018         Mount *m = MOUNT(u);
1019
1020         assert(m);
1021
1022         if (m->state == MOUNT_MOUNTING_DONE)
1023                 return -EAGAIN;
1024
1025         assert(m->state == MOUNT_MOUNTED);
1026
1027         mount_enter_remounting(m, true);
1028         return 0;
1029 }
1030
1031 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1032         Mount *m = MOUNT(u);
1033
1034         assert(m);
1035         assert(f);
1036         assert(fds);
1037
1038         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1039         unit_serialize_item(u, f, "failure", yes_no(m->failure));
1040
1041         if (m->control_pid > 0)
1042                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1043
1044         if (m->control_command_id >= 0)
1045                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1046
1047         return 0;
1048 }
1049
1050 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1051         Mount *m = MOUNT(u);
1052
1053         assert(u);
1054         assert(key);
1055         assert(value);
1056         assert(fds);
1057
1058         if (streq(key, "state")) {
1059                 MountState state;
1060
1061                 if ((state = mount_state_from_string(value)) < 0)
1062                         log_debug("Failed to parse state value %s", value);
1063                 else
1064                         m->deserialized_state = state;
1065         } else if (streq(key, "failure")) {
1066                 int b;
1067
1068                 if ((b = parse_boolean(value)) < 0)
1069                         log_debug("Failed to parse failure value %s", value);
1070                 else
1071                         m->failure = b || m->failure;
1072
1073         } else if (streq(key, "control-pid")) {
1074                 pid_t pid;
1075
1076                 if (parse_pid(value, &pid) < 0)
1077                         log_debug("Failed to parse control-pid value %s", value);
1078                 else
1079                         m->control_pid = pid;
1080         } else if (streq(key, "control-command")) {
1081                 MountExecCommand id;
1082
1083                 if ((id = mount_exec_command_from_string(value)) < 0)
1084                         log_debug("Failed to parse exec-command value %s", value);
1085                 else {
1086                         m->control_command_id = id;
1087                         m->control_command = m->exec_command + id;
1088                 }
1089
1090         } else
1091                 log_debug("Unknown serialization key '%s'", key);
1092
1093         return 0;
1094 }
1095
1096 static UnitActiveState mount_active_state(Unit *u) {
1097         assert(u);
1098
1099         return state_translation_table[MOUNT(u)->state];
1100 }
1101
1102 static const char *mount_sub_state_to_string(Unit *u) {
1103         assert(u);
1104
1105         return mount_state_to_string(MOUNT(u)->state);
1106 }
1107
1108 static bool mount_check_gc(Unit *u) {
1109         Mount *m = MOUNT(u);
1110
1111         assert(m);
1112
1113         return m->from_etc_fstab || m->from_proc_self_mountinfo;
1114 }
1115
1116 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1117         Mount *m = MOUNT(u);
1118         bool success;
1119
1120         assert(m);
1121         assert(pid >= 0);
1122
1123         if (pid != m->control_pid)
1124                 return;
1125
1126         m->control_pid = 0;
1127
1128         success = is_clean_exit(code, status);
1129         m->failure = m->failure || !success;
1130
1131         if (m->control_command) {
1132                 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1133                 m->control_command = NULL;
1134                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1135         }
1136
1137         log_full(success ? LOG_DEBUG : LOG_NOTICE,
1138                  "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1139
1140         /* Note that mount(8) returning and the kernel sending us a
1141          * mount table change event might happen out-of-order. If an
1142          * operation succeed we assume the kernel will follow soon too
1143          * and already change into the resulting state.  If it fails
1144          * we check if the kernel still knows about the mount. and
1145          * change state accordingly. */
1146
1147         switch (m->state) {
1148
1149         case MOUNT_MOUNTING:
1150         case MOUNT_MOUNTING_DONE:
1151         case MOUNT_MOUNTING_SIGKILL:
1152         case MOUNT_MOUNTING_SIGTERM:
1153
1154                 if (success)
1155                         mount_enter_mounted(m, true);
1156                 else if (m->from_proc_self_mountinfo)
1157                         mount_enter_mounted(m, false);
1158                 else
1159                         mount_enter_dead(m, false);
1160                 break;
1161
1162         case MOUNT_REMOUNTING:
1163         case MOUNT_REMOUNTING_SIGKILL:
1164         case MOUNT_REMOUNTING_SIGTERM:
1165
1166                 m->reload_failure = !success;
1167                 if (m->from_proc_self_mountinfo)
1168                         mount_enter_mounted(m, true);
1169                 else
1170                         mount_enter_dead(m, true);
1171
1172                 break;
1173
1174         case MOUNT_UNMOUNTING:
1175         case MOUNT_UNMOUNTING_SIGKILL:
1176         case MOUNT_UNMOUNTING_SIGTERM:
1177
1178                 if (success)
1179                         mount_enter_dead(m, true);
1180                 else if (m->from_proc_self_mountinfo)
1181                         mount_enter_mounted(m, false);
1182                 else
1183                         mount_enter_dead(m, false);
1184                 break;
1185
1186         default:
1187                 assert_not_reached("Uh, control process died at wrong time.");
1188         }
1189
1190         /* Notify clients about changed exit status */
1191         unit_add_to_dbus_queue(u);
1192 }
1193
1194 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1195         Mount *m = MOUNT(u);
1196
1197         assert(m);
1198         assert(elapsed == 1);
1199         assert(w == &m->timer_watch);
1200
1201         switch (m->state) {
1202
1203         case MOUNT_MOUNTING:
1204         case MOUNT_MOUNTING_DONE:
1205                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1206                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1207                 break;
1208
1209         case MOUNT_REMOUNTING:
1210                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1211                 m->reload_failure = true;
1212                 mount_enter_mounted(m, true);
1213                 break;
1214
1215         case MOUNT_UNMOUNTING:
1216                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1217                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1218                 break;
1219
1220         case MOUNT_MOUNTING_SIGTERM:
1221                 if (m->exec_context.send_sigkill) {
1222                         log_warning("%s mounting timed out. Killing.", u->meta.id);
1223                         mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1224                 } else {
1225                         log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1226
1227                         if (m->from_proc_self_mountinfo)
1228                                 mount_enter_mounted(m, false);
1229                         else
1230                                 mount_enter_dead(m, false);
1231                 }
1232                 break;
1233
1234         case MOUNT_REMOUNTING_SIGTERM:
1235                 if (m->exec_context.send_sigkill) {
1236                         log_warning("%s remounting timed out. Killing.", u->meta.id);
1237                         mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1238                 } else {
1239                         log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1240
1241                         if (m->from_proc_self_mountinfo)
1242                                 mount_enter_mounted(m, false);
1243                         else
1244                                 mount_enter_dead(m, false);
1245                 }
1246                 break;
1247
1248         case MOUNT_UNMOUNTING_SIGTERM:
1249                 if (m->exec_context.send_sigkill) {
1250                         log_warning("%s unmounting timed out. Killing.", u->meta.id);
1251                         mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1252                 } else {
1253                         log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1254
1255                         if (m->from_proc_self_mountinfo)
1256                                 mount_enter_mounted(m, false);
1257                         else
1258                                 mount_enter_dead(m, false);
1259                 }
1260                 break;
1261
1262         case MOUNT_MOUNTING_SIGKILL:
1263         case MOUNT_REMOUNTING_SIGKILL:
1264         case MOUNT_UNMOUNTING_SIGKILL:
1265                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1266
1267                 if (m->from_proc_self_mountinfo)
1268                         mount_enter_mounted(m, false);
1269                 else
1270                         mount_enter_dead(m, false);
1271                 break;
1272
1273         default:
1274                 assert_not_reached("Timeout at wrong time.");
1275         }
1276 }
1277
1278 static int mount_add_one(
1279                 Manager *m,
1280                 const char *what,
1281                 const char *where,
1282                 const char *options,
1283                 const char *fstype,
1284                 int passno,
1285                 bool from_proc_self_mountinfo,
1286                 bool set_flags) {
1287         int r;
1288         Unit *u;
1289         bool delete;
1290         char *e, *w = NULL, *o = NULL, *f = NULL;
1291         MountParameters *p;
1292
1293         assert(m);
1294         assert(what);
1295         assert(where);
1296         assert(options);
1297         assert(fstype);
1298
1299         assert(!set_flags || from_proc_self_mountinfo);
1300
1301         /* Ignore API mount points. They should never be referenced in
1302          * dependencies ever. */
1303         if (mount_point_is_api(where))
1304                 return 0;
1305         if (mount_point_ignore(where))
1306                 return 0;
1307
1308         if (streq(fstype, "autofs"))
1309                 return 0;
1310
1311         /* probably some kind of swap, ignore */
1312         if (!is_path(where))
1313                 return 0;
1314
1315         if (!(e = unit_name_from_path(where, ".mount")))
1316                 return -ENOMEM;
1317
1318         if (!(u = manager_get_unit(m, e))) {
1319                 delete = true;
1320
1321                 if (!(u = unit_new(m))) {
1322                         free(e);
1323                         return -ENOMEM;
1324                 }
1325
1326                 r = unit_add_name(u, e);
1327                 free(e);
1328
1329                 if (r < 0)
1330                         goto fail;
1331
1332                 if (!(MOUNT(u)->where = strdup(where))) {
1333                         r = -ENOMEM;
1334                         goto fail;
1335                 }
1336
1337                 unit_add_to_load_queue(u);
1338         } else {
1339                 delete = false;
1340                 free(e);
1341         }
1342
1343         if (!(w = strdup(what)) ||
1344             !(o = strdup(options)) ||
1345             !(f = strdup(fstype))) {
1346                 r = -ENOMEM;
1347                 goto fail;
1348         }
1349
1350         if (from_proc_self_mountinfo) {
1351                 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1352
1353                 if (set_flags) {
1354                         MOUNT(u)->is_mounted = true;
1355                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1356                         MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1357                 }
1358
1359                 MOUNT(u)->from_proc_self_mountinfo = true;
1360         } else {
1361                 p = &MOUNT(u)->parameters_etc_fstab;
1362                 MOUNT(u)->from_etc_fstab = true;
1363         }
1364
1365         free(p->what);
1366         p->what = w;
1367
1368         free(p->options);
1369         p->options = o;
1370
1371         free(p->fstype);
1372         p->fstype = f;
1373
1374         p->passno = passno;
1375
1376         unit_add_to_dbus_queue(u);
1377
1378         return 0;
1379
1380 fail:
1381         free(w);
1382         free(o);
1383         free(f);
1384
1385         if (delete && u)
1386                 unit_free(u);
1387
1388         return r;
1389 }
1390
1391 static int mount_find_pri(char *options) {
1392         char *end, *pri;
1393         unsigned long r;
1394
1395         if (!(pri = mount_test_option(options, "pri=")))
1396                 return 0;
1397
1398         pri += 4;
1399
1400         errno = 0;
1401         r = strtoul(pri, &end, 10);
1402
1403         if (errno != 0)
1404                 return -errno;
1405
1406         if (end == pri || (*end != ',' && *end != 0))
1407                 return -EINVAL;
1408
1409         return (int) r;
1410 }
1411
1412 static int mount_load_etc_fstab(Manager *m) {
1413         FILE *f;
1414         int r = 0;
1415         struct mntent* me;
1416
1417         assert(m);
1418
1419         errno = 0;
1420         if (!(f = setmntent("/etc/fstab", "r")))
1421                 return -errno;
1422
1423         while ((me = getmntent(f))) {
1424                 char *where, *what;
1425                 int k;
1426
1427                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1428                         r = -ENOMEM;
1429                         goto finish;
1430                 }
1431
1432                 if (!(where = strdup(me->mnt_dir))) {
1433                         free(what);
1434                         r = -ENOMEM;
1435                         goto finish;
1436                 }
1437
1438                 if (what[0] == '/')
1439                         path_kill_slashes(what);
1440
1441                 if (where[0] == '/')
1442                         path_kill_slashes(where);
1443
1444                 if (streq(me->mnt_type, "swap")) {
1445                         int pri;
1446
1447                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1448                                 k = pri;
1449                         else
1450                                 k = swap_add_one(m,
1451                                                  what,
1452                                                  NULL,
1453                                                  pri,
1454                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1455                                                  !!mount_test_option(me->mnt_opts, "nofail"),
1456                                                  !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1457                                                  false);
1458                 } else
1459                         k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1460
1461                 free(what);
1462                 free(where);
1463
1464                 if (r < 0)
1465                         r = k;
1466         }
1467
1468 finish:
1469
1470         endmntent(f);
1471         return r;
1472 }
1473
1474 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1475         int r = 0;
1476         unsigned i;
1477         char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1478
1479         assert(m);
1480
1481         rewind(m->proc_self_mountinfo);
1482
1483         for (i = 1;; i++) {
1484                 int k;
1485
1486                 device = path = options = options2 = fstype = d = p = o = NULL;
1487
1488                 if ((k = fscanf(m->proc_self_mountinfo,
1489                                 "%*s "       /* (1) mount id */
1490                                 "%*s "       /* (2) parent id */
1491                                 "%*s "       /* (3) major:minor */
1492                                 "%*s "       /* (4) root */
1493                                 "%ms "       /* (5) mount point */
1494                                 "%ms"        /* (6) mount options */
1495                                 "%*[^-]"     /* (7) optional fields */
1496                                 "- "         /* (8) separator */
1497                                 "%ms "       /* (9) file system type */
1498                                 "%ms"        /* (10) mount source */
1499                                 "%ms"        /* (11) mount options 2 */
1500                                 "%*[^\n]",   /* some rubbish at the end */
1501                                 &path,
1502                                 &options,
1503                                 &fstype,
1504                                 &device,
1505                                 &options2)) != 5) {
1506
1507                         if (k == EOF)
1508                                 break;
1509
1510                         log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1511                         goto clean_up;
1512                 }
1513
1514                 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1515                         r = -ENOMEM;
1516                         goto finish;
1517                 }
1518
1519                 if (!(d = cunescape(device)) ||
1520                     !(p = cunescape(path))) {
1521                         r = -ENOMEM;
1522                         goto finish;
1523                 }
1524
1525                 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1526                         r = k;
1527
1528 clean_up:
1529                 free(device);
1530                 free(path);
1531                 free(options);
1532                 free(options2);
1533                 free(fstype);
1534                 free(d);
1535                 free(p);
1536                 free(o);
1537         }
1538
1539 finish:
1540         free(device);
1541         free(path);
1542         free(options);
1543         free(options2);
1544         free(fstype);
1545         free(d);
1546         free(p);
1547         free(o);
1548
1549         return r;
1550 }
1551
1552 static void mount_shutdown(Manager *m) {
1553         assert(m);
1554
1555         if (m->proc_self_mountinfo) {
1556                 fclose(m->proc_self_mountinfo);
1557                 m->proc_self_mountinfo = NULL;
1558         }
1559 }
1560
1561 static int mount_enumerate(Manager *m) {
1562         int r;
1563         struct epoll_event ev;
1564         assert(m);
1565
1566         if (!m->proc_self_mountinfo) {
1567                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1568                         return -errno;
1569
1570                 m->mount_watch.type = WATCH_MOUNT;
1571                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1572
1573                 zero(ev);
1574                 ev.events = EPOLLPRI;
1575                 ev.data.ptr = &m->mount_watch;
1576
1577                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1578                         return -errno;
1579         }
1580
1581         if ((r = mount_load_etc_fstab(m)) < 0)
1582                 goto fail;
1583
1584         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1585                 goto fail;
1586
1587         return 0;
1588
1589 fail:
1590         mount_shutdown(m);
1591         return r;
1592 }
1593
1594 void mount_fd_event(Manager *m, int events) {
1595         Meta *meta;
1596         int r;
1597
1598         assert(m);
1599         assert(events & EPOLLPRI);
1600
1601         /* The manager calls this for every fd event happening on the
1602          * /proc/self/mountinfo file, which informs us about mounting
1603          * table changes */
1604
1605         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1606                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1607
1608                 /* Reset flags, just in case, for later calls */
1609                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1610                         Mount *mount = (Mount*) meta;
1611
1612                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1613                 }
1614
1615                 return;
1616         }
1617
1618         manager_dispatch_load_queue(m);
1619
1620         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1621                 Mount *mount = (Mount*) meta;
1622
1623                 if (!mount->is_mounted) {
1624                         /* This has just been unmounted. */
1625
1626                         mount->from_proc_self_mountinfo = false;
1627
1628                         switch (mount->state) {
1629
1630                         case MOUNT_MOUNTED:
1631                                 mount_enter_dead(mount, true);
1632                                 break;
1633
1634                         default:
1635                                 mount_set_state(mount, mount->state);
1636                                 break;
1637
1638                         }
1639
1640                 } else if (mount->just_mounted || mount->just_changed) {
1641
1642                         /* New or changed mount entry */
1643
1644                         switch (mount->state) {
1645
1646                         case MOUNT_DEAD:
1647                         case MOUNT_FAILED:
1648                                 mount_enter_mounted(mount, true);
1649                                 break;
1650
1651                         case MOUNT_MOUNTING:
1652                                 mount_enter_mounting_done(mount);
1653                                 break;
1654
1655                         default:
1656                                 /* Nothing really changed, but let's
1657                                  * issue an notification call
1658                                  * nonetheless, in case somebody is
1659                                  * waiting for this. (e.g. file system
1660                                  * ro/rw remounts.) */
1661                                 mount_set_state(mount, mount->state);
1662                                 break;
1663                         }
1664                 }
1665
1666                 /* Reset the flags for later calls */
1667                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1668         }
1669 }
1670
1671 static void mount_reset_failed(Unit *u) {
1672         Mount *m = MOUNT(u);
1673
1674         assert(m);
1675
1676         if (m->state == MOUNT_FAILED)
1677                 mount_set_state(m, MOUNT_DEAD);
1678
1679         m->failure = false;
1680 }
1681
1682 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1683         Mount *m = MOUNT(u);
1684         int r = 0;
1685         Set *pid_set = NULL;
1686
1687         assert(m);
1688
1689         if (who == KILL_MAIN) {
1690                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1691                 return -EINVAL;
1692         }
1693
1694         if (m->control_pid <= 0 && who == KILL_CONTROL) {
1695                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1696                 return -ENOENT;
1697         }
1698
1699         if (m->control_pid > 0)
1700                 if (kill(m->control_pid, signo) < 0)
1701                         r = -errno;
1702
1703         if (mode == KILL_CONTROL_GROUP) {
1704                 int q;
1705
1706                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1707                         return -ENOMEM;
1708
1709                 /* Exclude the control pid from being killed via the cgroup */
1710                 if (m->control_pid > 0)
1711                         if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1712                                 r = q;
1713                                 goto finish;
1714                         }
1715
1716                 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1717                         if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1718                                 r = q;
1719         }
1720
1721 finish:
1722         if (pid_set)
1723                 set_free(pid_set);
1724
1725         return r;
1726 }
1727
1728 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1729         [MOUNT_DEAD] = "dead",
1730         [MOUNT_MOUNTING] = "mounting",
1731         [MOUNT_MOUNTING_DONE] = "mounting-done",
1732         [MOUNT_MOUNTED] = "mounted",
1733         [MOUNT_REMOUNTING] = "remounting",
1734         [MOUNT_UNMOUNTING] = "unmounting",
1735         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1736         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1737         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1738         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1739         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1740         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1741         [MOUNT_FAILED] = "failed"
1742 };
1743
1744 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1745
1746 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1747         [MOUNT_EXEC_MOUNT] = "ExecMount",
1748         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1749         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1750 };
1751
1752 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1753
1754 const UnitVTable mount_vtable = {
1755         .suffix = ".mount",
1756
1757         .no_alias = true,
1758         .no_instances = true,
1759         .no_isolate = true,
1760         .show_status = true,
1761
1762         .init = mount_init,
1763         .load = mount_load,
1764         .done = mount_done,
1765
1766         .coldplug = mount_coldplug,
1767
1768         .dump = mount_dump,
1769
1770         .start = mount_start,
1771         .stop = mount_stop,
1772         .reload = mount_reload,
1773
1774         .kill = mount_kill,
1775
1776         .serialize = mount_serialize,
1777         .deserialize_item = mount_deserialize_item,
1778
1779         .active_state = mount_active_state,
1780         .sub_state_to_string = mount_sub_state_to_string,
1781
1782         .check_gc = mount_check_gc,
1783
1784         .sigchld_event = mount_sigchld_event,
1785         .timer_event = mount_timer_event,
1786
1787         .reset_failed = mount_reset_failed,
1788
1789         .bus_interface = "org.freedesktop.systemd1.Mount",
1790         .bus_message_handler = bus_mount_message_handler,
1791         .bus_invalidating_properties =  bus_mount_invalidating_properties,
1792
1793         .enumerate = mount_enumerate,
1794         .shutdown = mount_shutdown
1795 };