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