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