src/mount.c

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