src/mount.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   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 "mount.h"
  37 #include "dbus-mount.h"
  38 #include "special.h"
  39
  40 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
  41         [MOUNT_DEAD] = UNIT_INACTIVE,
  42         [MOUNT_MOUNTING] = UNIT_ACTIVATING,
  43         [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
  44         [MOUNT_MOUNTED] = UNIT_ACTIVE,
  45         [MOUNT_REMOUNTING] = UNIT_RELOADING,
  46         [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
  47         [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  48         [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  49         [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
  50         [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
  51         [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  52         [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  53         [MOUNT_MAINTENANCE] = UNIT_MAINTENANCE
  54 };
  55
  56 static void mount_init(Unit *u) {
  57         Mount *m = MOUNT(u);
  58
  59         assert(u);
  60         assert(u->meta.load_state == UNIT_STUB);
  61
  62         m->timeout_usec = DEFAULT_TIMEOUT_USEC;
  63         m->directory_mode = 0755;
  64
  65         exec_context_init(&m->exec_context);
  66
  67         /* We need to make sure that /bin/mount is always called in
  68          * the same process group as us, so that the autofs kernel
  69          * side doesn't send us another mount request while we are
  70          * already trying to comply its last one. */
  71         m->exec_context.same_pgrp = true;
  72
  73         m->timer_watch.type = WATCH_INVALID;
  74
  75         m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
  76 }
  77
  78 static void mount_unwatch_control_pid(Mount *m) {
  79         assert(m);
  80
  81         if (m->control_pid <= 0)
  82                 return;
  83
  84         unit_unwatch_pid(UNIT(m), m->control_pid);
  85         m->control_pid = 0;
  86 }
  87
  88 static void mount_parameters_done(MountParameters *p) {
  89         assert(p);
  90
  91         free(p->what);
  92         free(p->options);
  93         free(p->fstype);
  94
  95         p->what = p->options = p->fstype = NULL;
  96 }
  97
  98 static void mount_done(Unit *u) {
  99         Mount *m = MOUNT(u);
 100
 101         assert(m);
 102
 103         free(m->where);
 104         m->where = NULL;
 105
 106         mount_parameters_done(&m->parameters_etc_fstab);
 107         mount_parameters_done(&m->parameters_proc_self_mountinfo);
 108         mount_parameters_done(&m->parameters_fragment);
 109
 110         exec_context_done(&m->exec_context);
 111         exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
 112         m->control_command = NULL;
 113
 114         mount_unwatch_control_pid(m);
 115
 116         unit_unwatch_timer(u, &m->timer_watch);
 117 }
 118
 119 static int mount_add_mount_links(Mount *m) {
 120         Meta *other;
 121         int r;
 122
 123         assert(m);
 124
 125         /* Adds in links to other mount points that might lie below or
 126          * above us in the hierarchy */
 127
 128         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
 129                 Mount *n = (Mount*) other;
 130
 131                 if (n == m)
 132                         continue;
 133
 134                 if (n->meta.load_state != UNIT_LOADED)
 135                         continue;
 136
 137                 if (path_startswith(m->where, n->where)) {
 138
 139                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 140                                 return r;
 141
 142                         if (n->from_etc_fstab || n->from_fragment)
 143                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 144                                         return r;
 145
 146                 } else if (path_startswith(n->where, m->where)) {
 147
 148                         if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(n), true)) < 0)
 149                                 return r;
 150
 151                         if (m->from_etc_fstab || m->from_fragment)
 152                                 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 153                                         return r;
 154                 }
 155         }
 156
 157         return 0;
 158 }
 159
 160 static int mount_add_swap_links(Mount *m) {
 161         Meta *other;
 162         int r;
 163
 164         assert(m);
 165
 166         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
 167                 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
 168                         return r;
 169
 170         return 0;
 171 }
 172
 173 static int mount_add_path_links(Mount *m) {
 174         Meta *other;
 175         int r;
 176
 177         assert(m);
 178
 179         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
 180                 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
 181                         return r;
 182
 183         return 0;
 184 }
 185
 186 static int mount_add_automount_links(Mount *m) {
 187         Meta *other;
 188         int r;
 189
 190         assert(m);
 191
 192         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
 193                 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
 194                         return r;
 195
 196         return 0;
 197 }
 198
 199 static int mount_add_socket_links(Mount *m) {
 200         Meta *other;
 201         int r;
 202
 203         assert(m);
 204
 205         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
 206                 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
 207                         return r;
 208
 209         return 0;
 210 }
 211
 212 static char* mount_test_option(const char *haystack, const char *needle) {
 213         struct mntent me;
 214
 215         assert(needle);
 216
 217         /* Like glibc's hasmntopt(), but works on a string, not a
 218          * struct mntent */
 219
 220         if (!haystack)
 221                 return false;
 222
 223         zero(me);
 224         me.mnt_opts = (char*) haystack;
 225
 226         return hasmntopt(&me, needle);
 227 }
 228
 229 static int mount_add_target_links(Mount *m) {
 230         const char *target;
 231         MountParameters *p;
 232         Unit *tu;
 233         int r;
 234         bool noauto, handle, automount, user;
 235
 236         assert(m);
 237
 238         if (m->from_fragment)
 239                 p = &m->parameters_fragment;
 240         else if (m->from_etc_fstab)
 241                 p = &m->parameters_etc_fstab;
 242         else
 243                 return 0;
 244
 245         noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 246         user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users");
 247         handle = !!mount_test_option(p->options, "comment=systemd.mount");
 248         automount = !!mount_test_option(p->options, "comment=systemd.automount");
 249
 250         if (mount_test_option(p->options, "_netdev") ||
 251             fstype_is_network(p->fstype))
 252                 target = SPECIAL_REMOTE_FS_TARGET;
 253         else
 254                 target = SPECIAL_LOCAL_FS_TARGET;
 255
 256         if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
 257                 return r;
 258
 259         if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
 260                 Unit *am;
 261
 262                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
 263                         return r;
 264
 265                 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
 266         } else {
 267
 268                 if (!noauto && handle)
 269                         if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
 270                                 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
 271                                         return r;
 272
 273                 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
 274         }
 275 }
 276
 277 static int mount_add_default_dependencies(Mount *m) {
 278         int r;
 279
 280         assert(m);
 281
 282         if (m->meta.manager->running_as == MANAGER_SYSTEM) {
 283
 284                 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
 285                         return r;
 286
 287                 if (!path_equal(m->where, "/"))
 288                         if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
 289                                 return r;
 290         }
 291
 292         return 0;
 293 }
 294
 295 static int mount_verify(Mount *m) {
 296         bool b;
 297         char *e;
 298         assert(m);
 299
 300         if (m->meta.load_state != UNIT_LOADED)
 301                 return 0;
 302
 303         if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
 304                 return -ENOENT;
 305
 306         if (!(e = unit_name_from_path(m->where, ".mount")))
 307                 return -ENOMEM;
 308
 309         b = unit_has_name(UNIT(m), e);
 310         free(e);
 311
 312         if (!b) {
 313                 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
 314                 return -EINVAL;
 315         }
 316
 317         if (m->meta.fragment_path && !m->parameters_fragment.what) {
 318                 log_error("%s's What setting is missing. Refusing.", m->meta.id);
 319                 return -EBADMSG;
 320         }
 321
 322         if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 323                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
 324                 return -EINVAL;
 325         }
 326
 327         return 0;
 328 }
 329
 330 static int mount_load(Unit *u) {
 331         Mount *m = MOUNT(u);
 332         int r;
 333
 334         assert(u);
 335         assert(u->meta.load_state == UNIT_STUB);
 336
 337         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
 338                 return r;
 339
 340         /* This is a new unit? Then let's add in some extras */
 341         if (u->meta.load_state == UNIT_LOADED) {
 342                 const char *what = NULL;
 343
 344                 if (m->meta.fragment_path)
 345                         m->from_fragment = true;
 346
 347                 if (!m->where)
 348                         if (!(m->where = unit_name_to_path(u->meta.id)))
 349                                 return -ENOMEM;
 350
 351                 path_kill_slashes(m->where);
 352
 353                 if (!m->meta.description)
 354                         if ((r = unit_set_description(u, m->where)) < 0)
 355                                 return r;
 356
 357                 if (m->from_fragment && m->parameters_fragment.what)
 358                         what = m->parameters_fragment.what;
 359                 else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
 360                         what = m->parameters_etc_fstab.what;
 361                 else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
 362                         what = m->parameters_proc_self_mountinfo.what;
 363
 364                 if (what)
 365                         if ((r = unit_add_node_link(u, what, u->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
 366                                 return r;
 367
 368                 if ((r = mount_add_mount_links(m)) < 0)
 369                         return r;
 370
 371                 if ((r = mount_add_socket_links(m)) < 0)
 372                         return r;
 373
 374                 if ((r = mount_add_swap_links(m)) < 0)
 375                         return r;
 376
 377                 if ((r = mount_add_path_links(m)) < 0)
 378                         return r;
 379
 380                 if ((r = mount_add_automount_links(m)) < 0)
 381                         return r;
 382
 383                 if ((r = mount_add_target_links(m)) < 0)
 384                         return r;
 385
 386                 if ((r = unit_add_default_cgroup(u)) < 0)
 387                         return r;
 388
 389                 if (m->meta.default_dependencies)
 390                         if ((r = mount_add_default_dependencies(m)) < 0)
 391                                 return r;
 392         }
 393
 394         return mount_verify(m);
 395 }
 396
 397 static int mount_notify_automount(Mount *m, int status) {
 398         Unit *p;
 399         int r;
 400
 401         assert(m);
 402
 403         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
 404                 return r == -ENOENT ? 0 : r;
 405
 406         return automount_send_ready(AUTOMOUNT(p), status);
 407 }
 408
 409 static void mount_set_state(Mount *m, MountState state) {
 410         MountState old_state;
 411         assert(m);
 412
 413         old_state = m->state;
 414         m->state = state;
 415
 416         if (state != MOUNT_MOUNTING &&
 417             state != MOUNT_MOUNTING_DONE &&
 418             state != MOUNT_REMOUNTING &&
 419             state != MOUNT_UNMOUNTING &&
 420             state != MOUNT_MOUNTING_SIGTERM &&
 421             state != MOUNT_MOUNTING_SIGKILL &&
 422             state != MOUNT_UNMOUNTING_SIGTERM &&
 423             state != MOUNT_UNMOUNTING_SIGKILL &&
 424             state != MOUNT_REMOUNTING_SIGTERM &&
 425             state != MOUNT_REMOUNTING_SIGKILL) {
 426                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
 427                 mount_unwatch_control_pid(m);
 428                 m->control_command = NULL;
 429                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 430         }
 431
 432         if (state == MOUNT_MOUNTED ||
 433             state == MOUNT_REMOUNTING)
 434                 mount_notify_automount(m, 0);
 435         else if (state == MOUNT_DEAD ||
 436                  state == MOUNT_UNMOUNTING ||
 437                  state == MOUNT_MOUNTING_SIGTERM ||
 438                  state == MOUNT_MOUNTING_SIGKILL ||
 439                  state == MOUNT_REMOUNTING_SIGTERM ||
 440                  state == MOUNT_REMOUNTING_SIGKILL ||
 441                  state == MOUNT_UNMOUNTING_SIGTERM ||
 442                  state == MOUNT_UNMOUNTING_SIGKILL ||
 443                  state == MOUNT_MAINTENANCE)
 444                 mount_notify_automount(m, -ENODEV);
 445
 446         if (state != old_state)
 447                 log_debug("%s changed %s -> %s",
 448                           m->meta.id,
 449                           mount_state_to_string(old_state),
 450                           mount_state_to_string(state));
 451
 452         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
 453 }
 454
 455 static int mount_coldplug(Unit *u) {
 456         Mount *m = MOUNT(u);
 457         MountState new_state = MOUNT_DEAD;
 458         int r;
 459
 460         assert(m);
 461         assert(m->state == MOUNT_DEAD);
 462
 463         if (m->deserialized_state != m->state)
 464                 new_state = m->deserialized_state;
 465         else if (m->from_proc_self_mountinfo)
 466                 new_state = MOUNT_MOUNTED;
 467
 468         if (new_state != m->state) {
 469
 470                 if (new_state == MOUNT_MOUNTING ||
 471                     new_state == MOUNT_MOUNTING_DONE ||
 472                     new_state == MOUNT_REMOUNTING ||
 473                     new_state == MOUNT_UNMOUNTING ||
 474                     new_state == MOUNT_MOUNTING_SIGTERM ||
 475                     new_state == MOUNT_MOUNTING_SIGKILL ||
 476                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
 477                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
 478                     new_state == MOUNT_REMOUNTING_SIGTERM ||
 479                     new_state == MOUNT_REMOUNTING_SIGKILL) {
 480
 481                         if (m->control_pid <= 0)
 482                                 return -EBADMSG;
 483
 484                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
 485                                 return r;
 486
 487                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 488                                 return r;
 489                 }
 490
 491                 mount_set_state(m, new_state);
 492         }
 493
 494         return 0;
 495 }
 496
 497 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
 498         Mount *m = MOUNT(u);
 499         MountParameters *p;
 500
 501         assert(m);
 502         assert(f);
 503
 504         if (m->from_proc_self_mountinfo)
 505                 p = &m->parameters_proc_self_mountinfo;
 506         else if (m->from_fragment)
 507                 p = &m->parameters_fragment;
 508         else
 509                 p = &m->parameters_etc_fstab;
 510
 511         fprintf(f,
 512                 "%sMount State: %s\n"
 513                 "%sWhere: %s\n"
 514                 "%sWhat: %s\n"
 515                 "%sFile System Type: %s\n"
 516                 "%sOptions: %s\n"
 517                 "%sFrom /etc/fstab: %s\n"
 518                 "%sFrom /proc/self/mountinfo: %s\n"
 519                 "%sFrom fragment: %s\n"
 520                 "%sDirectoryMode: %04o\n",
 521                 prefix, mount_state_to_string(m->state),
 522                 prefix, m->where,
 523                 prefix, strna(p->what),
 524                 prefix, strna(p->fstype),
 525                 prefix, strna(p->options),
 526                 prefix, yes_no(m->from_etc_fstab),
 527                 prefix, yes_no(m->from_proc_self_mountinfo),
 528                 prefix, yes_no(m->from_fragment),
 529                 prefix, m->directory_mode);
 530
 531         if (m->control_pid > 0)
 532                 fprintf(f,
 533                         "%sControl PID: %lu\n",
 534                         prefix, (unsigned long) m->control_pid);
 535
 536         exec_context_dump(&m->exec_context, f, prefix);
 537 }
 538
 539 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 540         pid_t pid;
 541         int r;
 542
 543         assert(m);
 544         assert(c);
 545         assert(_pid);
 546
 547         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 548                 goto fail;
 549
 550         if ((r = exec_spawn(c,
 551                             NULL,
 552                             &m->exec_context,
 553                             NULL, 0,
 554                             m->meta.manager->environment,
 555                             true,
 556                             true,
 557                             true,
 558                             m->meta.manager->confirm_spawn,
 559                             m->meta.cgroup_bondings,
 560                             &pid)) < 0)
 561                 goto fail;
 562
 563         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 564                 /* FIXME: we need to do something here */
 565                 goto fail;
 566
 567         *_pid = pid;
 568
 569         return 0;
 570
 571 fail:
 572         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 573
 574         return r;
 575 }
 576
 577 static void mount_enter_dead(Mount *m, bool success) {
 578         assert(m);
 579
 580         if (!success)
 581                 m->failure = true;
 582
 583         mount_set_state(m, m->failure ? MOUNT_MAINTENANCE : MOUNT_DEAD);
 584 }
 585
 586 static void mount_enter_mounted(Mount *m, bool success) {
 587         assert(m);
 588
 589         if (!success)
 590                 m->failure = true;
 591
 592         mount_set_state(m, MOUNT_MOUNTED);
 593 }
 594
 595 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 596         int r;
 597         bool sent = false;
 598
 599         assert(m);
 600
 601         if (!success)
 602                 m->failure = true;
 603
 604         if (m->exec_context.kill_mode != KILL_NONE) {
 605                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 606                            state == MOUNT_UNMOUNTING_SIGTERM ||
 607                            state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
 608
 609                 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
 610
 611                         if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig)) < 0) {
 612                                 if (r != -EAGAIN && r != -ESRCH)
 613                                         goto fail;
 614                         } else
 615                                 sent = true;
 616                 }
 617
 618                 if (!sent && m->control_pid > 0)
 619                         if (kill(m->exec_context.kill_mode == KILL_PROCESS ?
 620                                  m->control_pid :
 621                                  -m->control_pid, sig) < 0 && errno != ESRCH) {
 622
 623                                 r = -errno;
 624                                 goto fail;
 625                         }
 626         }
 627
 628         if (sent) {
 629                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 630                         goto fail;
 631
 632                 mount_set_state(m, state);
 633         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 634                 mount_enter_mounted(m, true);
 635         else
 636                 mount_enter_dead(m, true);
 637
 638         return;
 639
 640 fail:
 641         log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
 642
 643         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 644                 mount_enter_mounted(m, false);
 645         else
 646                 mount_enter_dead(m, false);
 647 }
 648
 649 static void mount_enter_unmounting(Mount *m, bool success) {
 650         int r;
 651
 652         assert(m);
 653
 654         if (!success)
 655                 m->failure = true;
 656
 657         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 658         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 659
 660         if ((r = exec_command_set(
 661                              m->control_command,
 662                              "/bin/umount",
 663                              m->where,
 664                              NULL)) < 0)
 665                 goto fail;
 666
 667         mount_unwatch_control_pid(m);
 668
 669         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 670                 goto fail;
 671
 672         mount_set_state(m, MOUNT_UNMOUNTING);
 673
 674         return;
 675
 676 fail:
 677         log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
 678         mount_enter_mounted(m, false);
 679 }
 680
 681 static void mount_enter_mounting(Mount *m) {
 682         int r;
 683
 684         assert(m);
 685
 686         m->control_command_id = MOUNT_EXEC_MOUNT;
 687         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 688
 689         mkdir_p(m->where, m->directory_mode);
 690
 691         if (m->from_fragment)
 692                 r = exec_command_set(
 693                                 m->control_command,
 694                                 "/bin/mount",
 695                                 m->parameters_fragment.what,
 696                                 m->where,
 697                                 "-t", m->parameters_fragment.fstype,
 698                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 699                                 NULL);
 700         else if (m->from_etc_fstab)
 701                 r = exec_command_set(
 702                                 m->control_command,
 703                                 "/bin/mount",
 704                                 m->where,
 705                                 NULL);
 706         else
 707                 r = -ENOENT;
 708
 709         if (r < 0)
 710                 goto fail;
 711
 712         mount_unwatch_control_pid(m);
 713
 714         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 715                 goto fail;
 716
 717         mount_set_state(m, MOUNT_MOUNTING);
 718
 719         return;
 720
 721 fail:
 722         log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
 723         mount_enter_dead(m, false);
 724 }
 725
 726 static void mount_enter_mounting_done(Mount *m) {
 727         assert(m);
 728
 729         mount_set_state(m, MOUNT_MOUNTING_DONE);
 730 }
 731
 732 static void mount_enter_remounting(Mount *m, bool success) {
 733         int r;
 734
 735         assert(m);
 736
 737         if (!success)
 738                 m->failure = true;
 739
 740         m->control_command_id = MOUNT_EXEC_REMOUNT;
 741         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 742
 743         if (m->from_fragment) {
 744                 char *buf = NULL;
 745                 const char *o;
 746
 747                 if (m->parameters_fragment.options) {
 748                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 749                                 r = -ENOMEM;
 750                                 goto fail;
 751                         }
 752
 753                         o = buf;
 754                 } else
 755                         o = "remount";
 756
 757                 r = exec_command_set(
 758                                 m->control_command,
 759                                 "/bin/mount",
 760                                 m->parameters_fragment.what,
 761                                 m->where,
 762                                 "-t", m->parameters_fragment.fstype,
 763                                 "-o", o,
 764                                 NULL);
 765
 766                 free(buf);
 767         } else if (m->from_etc_fstab)
 768                 r = exec_command_set(
 769                                 m->control_command,
 770                                 "/bin/mount",
 771                                 m->where,
 772                                 "-o", "remount",
 773                                 NULL);
 774         else
 775                 r = -ENOENT;
 776
 777         if (r < 0) {
 778                 r = -ENOMEM;
 779                 goto fail;
 780         }
 781
 782         mount_unwatch_control_pid(m);
 783
 784         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 785                 goto fail;
 786
 787         mount_set_state(m, MOUNT_REMOUNTING);
 788
 789         return;
 790
 791 fail:
 792         mount_enter_mounted(m, false);
 793 }
 794
 795 static int mount_start(Unit *u) {
 796         Mount *m = MOUNT(u);
 797
 798         assert(m);
 799
 800         /* We cannot fulfill this request right now, try again later
 801          * please! */
 802         if (m->state == MOUNT_UNMOUNTING ||
 803             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 804             m->state == MOUNT_UNMOUNTING_SIGKILL)
 805                 return -EAGAIN;
 806
 807         /* Already on it! */
 808         if (m->state == MOUNT_MOUNTING ||
 809             m->state == MOUNT_MOUNTING_SIGTERM ||
 810             m->state == MOUNT_MOUNTING_SIGKILL)
 811                 return 0;
 812
 813         assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTENANCE);
 814
 815         m->failure = false;
 816         mount_enter_mounting(m);
 817         return 0;
 818 }
 819
 820 static int mount_stop(Unit *u) {
 821         Mount *m = MOUNT(u);
 822
 823         assert(m);
 824
 825         /* Already on it */
 826         if (m->state == MOUNT_UNMOUNTING ||
 827             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 828             m->state == MOUNT_UNMOUNTING_SIGTERM)
 829                 return 0;
 830
 831         assert(m->state == MOUNT_MOUNTING ||
 832                m->state == MOUNT_MOUNTING_DONE ||
 833                m->state == MOUNT_MOUNTED ||
 834                m->state == MOUNT_MOUNTING_SIGTERM ||
 835                m->state == MOUNT_MOUNTING_SIGKILL ||
 836                m->state == MOUNT_REMOUNTING ||
 837                m->state == MOUNT_REMOUNTING_SIGTERM ||
 838                m->state == MOUNT_REMOUNTING_SIGKILL);
 839
 840         mount_enter_unmounting(m, true);
 841         return 0;
 842 }
 843
 844 static int mount_reload(Unit *u) {
 845         Mount *m = MOUNT(u);
 846
 847         assert(m);
 848
 849         if (m->state == MOUNT_MOUNTING_DONE)
 850                 return -EAGAIN;
 851
 852         assert(m->state == MOUNT_MOUNTED);
 853
 854         mount_enter_remounting(m, true);
 855         return 0;
 856 }
 857
 858 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
 859         Mount *m = MOUNT(u);
 860
 861         assert(m);
 862         assert(f);
 863         assert(fds);
 864
 865         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
 866         unit_serialize_item(u, f, "failure", yes_no(m->failure));
 867
 868         if (m->control_pid > 0)
 869                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
 870
 871         if (m->control_command_id >= 0)
 872                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
 873
 874         return 0;
 875 }
 876
 877 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
 878         Mount *m = MOUNT(u);
 879         int r;
 880
 881         assert(u);
 882         assert(key);
 883         assert(value);
 884         assert(fds);
 885
 886         if (streq(key, "state")) {
 887                 MountState state;
 888
 889                 if ((state = mount_state_from_string(value)) < 0)
 890                         log_debug("Failed to parse state value %s", value);
 891                 else
 892                         m->deserialized_state = state;
 893         } else if (streq(key, "failure")) {
 894                 int b;
 895
 896                 if ((b = parse_boolean(value)) < 0)
 897                         log_debug("Failed to parse failure value %s", value);
 898                 else
 899                         m->failure = b || m->failure;
 900
 901         } else if (streq(key, "control-pid")) {
 902                 pid_t pid;
 903
 904                 if ((r = parse_pid(value, &pid)) < 0)
 905                         log_debug("Failed to parse control-pid value %s", value);
 906                 else
 907                         m->control_pid = pid;
 908         } else if (streq(key, "control-command")) {
 909                 MountExecCommand id;
 910
 911                 if ((id = mount_exec_command_from_string(value)) < 0)
 912                         log_debug("Failed to parse exec-command value %s", value);
 913                 else {
 914                         m->control_command_id = id;
 915                         m->control_command = m->exec_command + id;
 916                 }
 917
 918         } else
 919                 log_debug("Unknown serialization key '%s'", key);
 920
 921         return 0;
 922 }
 923
 924 static UnitActiveState mount_active_state(Unit *u) {
 925         assert(u);
 926
 927         return state_translation_table[MOUNT(u)->state];
 928 }
 929
 930 static const char *mount_sub_state_to_string(Unit *u) {
 931         assert(u);
 932
 933         return mount_state_to_string(MOUNT(u)->state);
 934 }
 935
 936 static bool mount_check_gc(Unit *u) {
 937         Mount *m = MOUNT(u);
 938
 939         assert(m);
 940
 941         return m->from_etc_fstab || m->from_proc_self_mountinfo;
 942 }
 943
 944 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
 945         Mount *m = MOUNT(u);
 946         bool success;
 947
 948         assert(m);
 949         assert(pid >= 0);
 950
 951         if (pid != m->control_pid)
 952                 return;
 953
 954         m->control_pid = 0;
 955
 956         success = is_clean_exit(code, status);
 957         m->failure = m->failure || !success;
 958
 959         if (m->control_command) {
 960                 exec_status_exit(&m->control_command->exec_status, pid, code, status);
 961                 m->control_command = NULL;
 962                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 963         }
 964
 965         log_full(success ? LOG_DEBUG : LOG_NOTICE,
 966                  "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
 967
 968         /* Note that mount(8) returning and the kernel sending us a
 969          * mount table change event might happen out-of-order. If an
 970          * operation succeed we assume the kernel will follow soon too
 971          * and already change into the resulting state.  If it fails
 972          * we check if the kernel still knows about the mount. and
 973          * change state accordingly. */
 974
 975         switch (m->state) {
 976
 977         case MOUNT_MOUNTING:
 978         case MOUNT_MOUNTING_DONE:
 979         case MOUNT_MOUNTING_SIGKILL:
 980         case MOUNT_MOUNTING_SIGTERM:
 981         case MOUNT_REMOUNTING:
 982         case MOUNT_REMOUNTING_SIGKILL:
 983         case MOUNT_REMOUNTING_SIGTERM:
 984
 985                 if (success)
 986                         mount_enter_mounted(m, true);
 987                 else if (m->from_proc_self_mountinfo)
 988                         mount_enter_mounted(m, false);
 989                 else
 990                         mount_enter_dead(m, false);
 991                 break;
 992
 993         case MOUNT_UNMOUNTING:
 994         case MOUNT_UNMOUNTING_SIGKILL:
 995         case MOUNT_UNMOUNTING_SIGTERM:
 996
 997                 if (success)
 998                         mount_enter_dead(m, true);
 999                 else if (m->from_proc_self_mountinfo)
1000                         mount_enter_mounted(m, false);
1001                 else
1002                         mount_enter_dead(m, false);
1003                 break;
1004
1005         default:
1006                 assert_not_reached("Uh, control process died at wrong time.");
1007         }
1008 }
1009
1010 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1011         Mount *m = MOUNT(u);
1012
1013         assert(m);
1014         assert(elapsed == 1);
1015         assert(w == &m->timer_watch);
1016
1017         switch (m->state) {
1018
1019         case MOUNT_MOUNTING:
1020         case MOUNT_MOUNTING_DONE:
1021                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1022                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1023                 break;
1024
1025         case MOUNT_REMOUNTING:
1026                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1027                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1028                 break;
1029
1030         case MOUNT_UNMOUNTING:
1031                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1032                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1033                 break;
1034
1035         case MOUNT_MOUNTING_SIGTERM:
1036                 log_warning("%s mounting timed out. Killing.", u->meta.id);
1037                 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1038                 break;
1039
1040         case MOUNT_REMOUNTING_SIGTERM:
1041                 log_warning("%s remounting timed out. Killing.", u->meta.id);
1042                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1043                 break;
1044
1045         case MOUNT_UNMOUNTING_SIGTERM:
1046                 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1047                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1048                 break;
1049
1050         case MOUNT_MOUNTING_SIGKILL:
1051         case MOUNT_REMOUNTING_SIGKILL:
1052         case MOUNT_UNMOUNTING_SIGKILL:
1053                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1054
1055                 if (m->from_proc_self_mountinfo)
1056                         mount_enter_mounted(m, false);
1057                 else
1058                         mount_enter_dead(m, false);
1059                 break;
1060
1061         default:
1062                 assert_not_reached("Timeout at wrong time.");
1063         }
1064 }
1065
1066 static int mount_add_one(
1067                 Manager *m,
1068                 const char *what,
1069                 const char *where,
1070                 const char *options,
1071                 const char *fstype,
1072                 bool from_proc_self_mountinfo,
1073                 bool set_flags) {
1074         int r;
1075         Unit *u;
1076         bool delete;
1077         char *e, *w = NULL, *o = NULL, *f = NULL;
1078         MountParameters *p;
1079
1080         assert(m);
1081         assert(what);
1082         assert(where);
1083         assert(options);
1084         assert(fstype);
1085
1086         assert(!set_flags || from_proc_self_mountinfo);
1087
1088         /* Ignore API mount points. They should never be referenced in
1089          * dependencies ever. */
1090         if (mount_point_is_api(where))
1091                 return 0;
1092
1093         if (streq(fstype, "autofs"))
1094                 return 0;
1095
1096         /* probably some kind of swap, ignore */
1097         if (!is_path(where))
1098                 return 0;
1099
1100         if (!(e = unit_name_from_path(where, ".mount")))
1101                 return -ENOMEM;
1102
1103         if (!(u = manager_get_unit(m, e))) {
1104                 delete = true;
1105
1106                 if (!(u = unit_new(m))) {
1107                         free(e);
1108                         return -ENOMEM;
1109                 }
1110
1111                 r = unit_add_name(u, e);
1112                 free(e);
1113
1114                 if (r < 0)
1115                         goto fail;
1116
1117                 if (!(MOUNT(u)->where = strdup(where))) {
1118                         r = -ENOMEM;
1119                         goto fail;
1120                 }
1121
1122                 unit_add_to_load_queue(u);
1123         } else {
1124                 delete = false;
1125                 free(e);
1126         }
1127
1128         if (!(w = strdup(what)) ||
1129             !(o = strdup(options)) ||
1130             !(f = strdup(fstype))) {
1131                 r = -ENOMEM;
1132                 goto fail;
1133         }
1134
1135         if (from_proc_self_mountinfo) {
1136                 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1137
1138                 if (set_flags) {
1139                         MOUNT(u)->is_mounted = true;
1140                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1141                         MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1142                 }
1143
1144                 MOUNT(u)->from_proc_self_mountinfo = true;
1145         } else {
1146                 p = &MOUNT(u)->parameters_etc_fstab;
1147                 MOUNT(u)->from_etc_fstab = true;
1148         }
1149
1150         free(p->what);
1151         p->what = w;
1152
1153         free(p->options);
1154         p->options = o;
1155
1156         free(p->fstype);
1157         p->fstype = f;
1158
1159         unit_add_to_dbus_queue(u);
1160
1161         return 0;
1162
1163 fail:
1164         free(w);
1165         free(o);
1166         free(f);
1167
1168         if (delete && u)
1169                 unit_free(u);
1170
1171         return r;
1172 }
1173
1174 static char *fstab_node_to_udev_node(char *p) {
1175         char *dn, *t;
1176         int r;
1177
1178         /* FIXME: to follow udev's logic 100% we need to leave valid
1179          * UTF8 chars unescaped */
1180
1181         if (startswith(p, "LABEL=")) {
1182
1183                 if (!(t = xescape(p+6, "/ ")))
1184                         return NULL;
1185
1186                 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1187                 free(t);
1188
1189                 if (r < 0)
1190                         return NULL;
1191
1192                 return dn;
1193         }
1194
1195         if (startswith(p, "UUID=")) {
1196
1197                 if (!(t = xescape(p+5, "/ ")))
1198                         return NULL;
1199
1200                 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1201                 free(t);
1202
1203                 if (r < 0)
1204                         return NULL;
1205
1206                 return dn;
1207         }
1208
1209         return strdup(p);
1210 }
1211
1212 static int mount_find_pri(char *options) {
1213         char *end, *pri;
1214         unsigned long r;
1215
1216         if (!(pri = mount_test_option(options, "pri=")))
1217                 return 0;
1218
1219         pri += 4;
1220
1221         errno = 0;
1222         r = strtoul(pri, &end, 10);
1223
1224         if (errno != 0)
1225                 return -errno;
1226
1227         if (end == pri || (*end != ',' && *end != 0))
1228                 return -EINVAL;
1229
1230         return (int) r;
1231 }
1232
1233 static int mount_load_etc_fstab(Manager *m) {
1234         FILE *f;
1235         int r;
1236         struct mntent* me;
1237
1238         assert(m);
1239
1240         errno = 0;
1241         if (!(f = setmntent("/etc/fstab", "r")))
1242                 return -errno;
1243
1244         while ((me = getmntent(f))) {
1245                 char *where, *what;
1246
1247                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1248                         r = -ENOMEM;
1249                         goto finish;
1250                 }
1251
1252                 if (!(where = strdup(me->mnt_dir))) {
1253                         free(what);
1254                         r = -ENOMEM;
1255                         goto finish;
1256                 }
1257
1258                 if (what[0] == '/')
1259                         path_kill_slashes(what);
1260
1261                 if (where[0] == '/')
1262                         path_kill_slashes(where);
1263
1264                 if (streq(me->mnt_type, "swap")) {
1265                         int pri;
1266
1267                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1268                                 r = pri;
1269                         else
1270                                 r = swap_add_one(m,
1271                                                  what,
1272                                                  pri,
1273                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1274                                                  !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1275                                                  false);
1276                 } else
1277                         r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1278
1279                 free(what);
1280                 free(where);
1281
1282                 if (r < 0)
1283                         goto finish;
1284         }
1285
1286         r = 0;
1287 finish:
1288
1289         endmntent(f);
1290         return r;
1291 }
1292
1293 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1294         int r;
1295         char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1296
1297         assert(m);
1298
1299         rewind(m->proc_self_mountinfo);
1300
1301         for (;;) {
1302                 int k;
1303
1304                 device = path = options = options2 = fstype = d = p = o = NULL;
1305
1306                 if ((k = fscanf(m->proc_self_mountinfo,
1307                                 "%*s "       /* (1) mount id */
1308                                 "%*s "       /* (2) parent id */
1309                                 "%*s "       /* (3) major:minor */
1310                                 "%*s "       /* (4) root */
1311                                 "%ms "       /* (5) mount point */
1312                                 "%ms"        /* (6) mount options */
1313                                 "%*[^-]"     /* (7) optional fields */
1314                                 "- "         /* (8) seperator */
1315                                 "%ms "       /* (9) file system type */
1316                                 "%ms"        /* (10) mount source */
1317                                 "%ms"        /* (11) mount options 2 */
1318                                 "%*[^\n]",   /* some rubbish at the end */
1319                                 &path,
1320                                 &options,
1321                                 &fstype,
1322                                 &device,
1323                                 &options2)) != 5) {
1324
1325                         if (k == EOF)
1326                                 break;
1327
1328                         r = -EBADMSG;
1329                         goto finish;
1330                 }
1331
1332                 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1333                         r = -ENOMEM;
1334                         goto finish;
1335                 }
1336
1337                 if (!(d = cunescape(device)) ||
1338                     !(p = cunescape(path))) {
1339                         r = -ENOMEM;
1340                         goto finish;
1341                 }
1342
1343                 if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1344                         goto finish;
1345
1346                 free(device);
1347                 free(path);
1348                 free(options);
1349                 free(options2);
1350                 free(fstype);
1351                 free(d);
1352                 free(p);
1353                 free(o);
1354         }
1355
1356         r = 0;
1357
1358 finish:
1359         free(device);
1360         free(path);
1361         free(options);
1362         free(options2);
1363         free(fstype);
1364         free(d);
1365         free(p);
1366         free(o);
1367
1368         return r;
1369 }
1370
1371 static void mount_shutdown(Manager *m) {
1372         assert(m);
1373
1374         if (m->proc_self_mountinfo) {
1375                 fclose(m->proc_self_mountinfo);
1376                 m->proc_self_mountinfo = NULL;
1377         }
1378 }
1379
1380 static int mount_enumerate(Manager *m) {
1381         int r;
1382         struct epoll_event ev;
1383         assert(m);
1384
1385         if (!m->proc_self_mountinfo) {
1386                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1387                         return -errno;
1388
1389                 m->mount_watch.type = WATCH_MOUNT;
1390                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1391
1392                 zero(ev);
1393                 ev.events = EPOLLERR;
1394                 ev.data.ptr = &m->mount_watch;
1395
1396                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1397                         return -errno;
1398         }
1399
1400         if ((r = mount_load_etc_fstab(m)) < 0)
1401                 goto fail;
1402
1403         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1404                 goto fail;
1405
1406         return 0;
1407
1408 fail:
1409         mount_shutdown(m);
1410         return r;
1411 }
1412
1413 void mount_fd_event(Manager *m, int events) {
1414         Meta *meta;
1415         int r;
1416
1417         assert(m);
1418         assert(events == EPOLLERR);
1419
1420         /* The manager calls this for every fd event happening on the
1421          * /proc/self/mountinfo file, which informs us about mounting
1422          * table changes */
1423
1424         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1425                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(errno));
1426
1427                 /* Reset flags, just in case, for later calls */
1428                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1429                         Mount *mount = (Mount*) meta;
1430
1431                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1432                 }
1433
1434                 return;
1435         }
1436
1437         manager_dispatch_load_queue(m);
1438
1439         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1440                 Mount *mount = (Mount*) meta;
1441
1442                 if (!mount->is_mounted) {
1443                         /* This has just been unmounted. */
1444
1445                         mount->from_proc_self_mountinfo = false;
1446
1447                         switch (mount->state) {
1448
1449                         case MOUNT_MOUNTED:
1450                                 mount_enter_dead(mount, true);
1451                                 break;
1452
1453                         default:
1454                                 mount_set_state(mount, mount->state);
1455                                 break;
1456
1457                         }
1458
1459                 } else if (mount->just_mounted || mount->just_changed) {
1460
1461                         /* New or changed entrymount */
1462
1463                         switch (mount->state) {
1464
1465                         case MOUNT_DEAD:
1466                         case MOUNT_MAINTENANCE:
1467                                 mount_enter_mounted(mount, true);
1468                                 break;
1469
1470                         case MOUNT_MOUNTING:
1471                                 mount_enter_mounting_done(mount);
1472                                 break;
1473
1474                         default:
1475                                 /* Nothing really changed, but let's
1476                                  * issue an notification call
1477                                  * nonetheless, in case somebody is
1478                                  * waiting for this. (e.g. file system
1479                                  * ro/rw remounts.) */
1480                                 mount_set_state(mount, mount->state);
1481                                 break;
1482                         }
1483                 }
1484
1485                 /* Reset the flags for later calls */
1486                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1487         }
1488 }
1489
1490 int mount_path_is_mounted(Manager *m, const char* path) {
1491         char *t;
1492         int r;
1493
1494         assert(m);
1495         assert(path);
1496
1497         if (path[0] != '/')
1498                 return 1;
1499
1500         if (!(t = strdup(path)))
1501                 return -ENOMEM;
1502
1503         path_kill_slashes(t);
1504
1505         for (;;) {
1506                 char *e, *slash;
1507                 Unit *u;
1508
1509                 if (!(e = unit_name_from_path(t, ".mount"))) {
1510                         r = -ENOMEM;
1511                         goto finish;
1512                 }
1513
1514                 u = manager_get_unit(m, e);
1515                 free(e);
1516
1517                 if (u &&
1518                     (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1519                     MOUNT(u)->state != MOUNT_MOUNTED) {
1520                         r = 0;
1521                         goto finish;
1522                 }
1523
1524                 assert_se(slash = strrchr(t, '/'));
1525
1526                 if (slash == t) {
1527                         r = 1;
1528                         goto finish;
1529                 }
1530
1531                 *slash = 0;
1532         }
1533
1534         r = 1;
1535
1536 finish:
1537         free(t);
1538         return r;
1539 }
1540
1541 static void mount_reset_maintenance(Unit *u) {
1542         Mount *m = MOUNT(u);
1543
1544         assert(m);
1545
1546         if (m->state == MOUNT_MAINTENANCE)
1547                 mount_set_state(m, MOUNT_DEAD);
1548
1549         m->failure = false;
1550 }
1551
1552 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1553         [MOUNT_DEAD] = "dead",
1554         [MOUNT_MOUNTING] = "mounting",
1555         [MOUNT_MOUNTING_DONE] = "mounting-done",
1556         [MOUNT_MOUNTED] = "mounted",
1557         [MOUNT_REMOUNTING] = "remounting",
1558         [MOUNT_UNMOUNTING] = "unmounting",
1559         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1560         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1561         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1562         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1563         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1564         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1565         [MOUNT_MAINTENANCE] = "maintenance"
1566 };
1567
1568 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1569
1570 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1571         [MOUNT_EXEC_MOUNT] = "ExecMount",
1572         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1573         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1574 };
1575
1576 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1577
1578 const UnitVTable mount_vtable = {
1579         .suffix = ".mount",
1580
1581         .no_alias = true,
1582         .no_instances = true,
1583         .no_isolate = true,
1584         .show_status = true,
1585
1586         .init = mount_init,
1587         .load = mount_load,
1588         .done = mount_done,
1589
1590         .coldplug = mount_coldplug,
1591
1592         .dump = mount_dump,
1593
1594         .start = mount_start,
1595         .stop = mount_stop,
1596         .reload = mount_reload,
1597
1598         .serialize = mount_serialize,
1599         .deserialize_item = mount_deserialize_item,
1600
1601         .active_state = mount_active_state,
1602         .sub_state_to_string = mount_sub_state_to_string,
1603
1604         .check_gc = mount_check_gc,
1605
1606         .sigchld_event = mount_sigchld_event,
1607         .timer_event = mount_timer_event,
1608
1609         .reset_maintenance = mount_reset_maintenance,
1610
1611         .bus_message_handler = bus_mount_message_handler,
1612
1613         .enumerate = mount_enumerate,
1614         .shutdown = mount_shutdown
1615 };