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