src/mount.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <stdio.h>
  24 #include <mntent.h>
  25 #include <sys/epoll.h>
  26 #include <signal.h>
  27
  28 #include "unit.h"
  29 #include "mount.h"
  30 #include "load-fragment.h"
  31 #include "load-dropin.h"
  32 #include "log.h"
  33 #include "strv.h"
  34 #include "mount-setup.h"
  35 #include "unit-name.h"
  36 #include "mount.h"
  37 #include "dbus-mount.h"
  38 #include "special.h"
  39
  40 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
  41         [MOUNT_DEAD] = UNIT_INACTIVE,
  42         [MOUNT_MOUNTING] = UNIT_ACTIVATING,
  43         [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
  44         [MOUNT_MOUNTED] = UNIT_ACTIVE,
  45         [MOUNT_REMOUNTING] = UNIT_RELOADING,
  46         [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
  47         [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  48         [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  49         [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
  50         [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
  51         [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  52         [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  53         [MOUNT_MAINTENANCE] = UNIT_MAINTENANCE
  54 };
  55
  56 static void mount_init(Unit *u) {
  57         Mount *m = MOUNT(u);
  58
  59         assert(u);
  60         assert(u->meta.load_state == UNIT_STUB);
  61
  62         m->timeout_usec = DEFAULT_TIMEOUT_USEC;
  63         m->directory_mode = 0755;
  64
  65         exec_context_init(&m->exec_context);
  66
  67         /* We need to make sure that /bin/mount is always called in
  68          * the same process group as us, so that the autofs kernel
  69          * side doesn't send us another mount request while we are
  70          * already trying to comply its last one. */
  71         m->exec_context.same_pgrp = true;
  72
  73         m->timer_watch.type = WATCH_INVALID;
  74
  75         m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
  76 }
  77
  78 static void mount_unwatch_control_pid(Mount *m) {
  79         assert(m);
  80
  81         if (m->control_pid <= 0)
  82                 return;
  83
  84         unit_unwatch_pid(UNIT(m), m->control_pid);
  85         m->control_pid = 0;
  86 }
  87
  88 static void mount_parameters_done(MountParameters *p) {
  89         assert(p);
  90
  91         free(p->what);
  92         free(p->options);
  93         free(p->fstype);
  94
  95         p->what = p->options = p->fstype = NULL;
  96 }
  97
  98 static void mount_done(Unit *u) {
  99         Mount *m = MOUNT(u);
 100
 101         assert(m);
 102
 103         free(m->where);
 104         m->where = NULL;
 105
 106         mount_parameters_done(&m->parameters_etc_fstab);
 107         mount_parameters_done(&m->parameters_proc_self_mountinfo);
 108         mount_parameters_done(&m->parameters_fragment);
 109
 110         exec_context_done(&m->exec_context);
 111         exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
 112         m->control_command = NULL;
 113
 114         mount_unwatch_control_pid(m);
 115
 116         unit_unwatch_timer(u, &m->timer_watch);
 117 }
 118
 119 static int mount_add_mount_links(Mount *m) {
 120         Meta *other;
 121         int r;
 122
 123         assert(m);
 124
 125         /* Adds in links to other mount points that might lie below or
 126          * above us in the hierarchy */
 127
 128         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
 129                 Mount *n = (Mount*) other;
 130
 131                 if (n == m)
 132                         continue;
 133
 134                 if (n->meta.load_state != UNIT_LOADED)
 135                         continue;
 136
 137                 if (path_startswith(m->where, n->where)) {
 138
 139                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 140                                 return r;
 141
 142                         if (n->from_etc_fstab || n->from_fragment)
 143                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 144                                         return r;
 145
 146                 } else if (path_startswith(n->where, m->where)) {
 147
 148                         if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(n), true)) < 0)
 149                                 return r;
 150
 151                         if (m->from_etc_fstab || m->from_fragment)
 152                                 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 153                                         return r;
 154                 }
 155         }
 156
 157         return 0;
 158 }
 159
 160 static int mount_add_swap_links(Mount *m) {
 161         Meta *other;
 162         int r;
 163
 164         assert(m);
 165
 166         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
 167                 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
 168                         return r;
 169
 170         return 0;
 171 }
 172
 173 static int mount_add_path_links(Mount *m) {
 174         Meta *other;
 175         int r;
 176
 177         assert(m);
 178
 179         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
 180                 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
 181                         return r;
 182
 183         return 0;
 184 }
 185
 186 static int mount_add_automount_links(Mount *m) {
 187         Meta *other;
 188         int r;
 189
 190         assert(m);
 191
 192         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
 193                 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
 194                         return r;
 195
 196         return 0;
 197 }
 198
 199 static int mount_add_socket_links(Mount *m) {
 200         Meta *other;
 201         int r;
 202
 203         assert(m);
 204
 205         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
 206                 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
 207                         return r;
 208
 209         return 0;
 210 }
 211
 212 static char* mount_test_option(const char *haystack, const char *needle) {
 213         struct mntent me;
 214
 215         assert(needle);
 216
 217         /* Like glibc's hasmntopt(), but works on a string, not a
 218          * struct mntent */
 219
 220         if (!haystack)
 221                 return false;
 222
 223         zero(me);
 224         me.mnt_opts = (char*) haystack;
 225
 226         return hasmntopt(&me, needle);
 227 }
 228
 229 static int mount_add_target_links(Mount *m) {
 230         const char *target;
 231         MountParameters *p;
 232         Unit *tu;
 233         int r;
 234         bool noauto, handle, automount, user;
 235
 236         assert(m);
 237
 238         if (m->from_fragment)
 239                 p = &m->parameters_fragment;
 240         else if (m->from_etc_fstab)
 241                 p = &m->parameters_etc_fstab;
 242         else
 243                 return 0;
 244
 245         noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 246         user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users");
 247         handle = !!mount_test_option(p->options, "comment=systemd.mount");
 248         automount = !!mount_test_option(p->options, "comment=systemd.automount");
 249
 250         if (mount_test_option(p->options, "_netdev") ||
 251             fstype_is_network(p->fstype))
 252                 target = SPECIAL_REMOTE_FS_TARGET;
 253         else
 254                 target = SPECIAL_LOCAL_FS_TARGET;
 255
 256         if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
 257                 return r;
 258
 259         if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
 260                 Unit *am;
 261
 262                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
 263                         return r;
 264
 265                 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
 266         } else {
 267
 268                 if (!noauto && handle)
 269                         if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
 270                                 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
 271                                         return r;
 272
 273                 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
 274         }
 275 }
 276
 277 static int mount_verify(Mount *m) {
 278         bool b;
 279         char *e;
 280         assert(m);
 281
 282         if (m->meta.load_state != UNIT_LOADED)
 283                 return 0;
 284
 285         if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
 286                 return -ENOENT;
 287
 288         if (!(e = unit_name_from_path(m->where, ".mount")))
 289                 return -ENOMEM;
 290
 291         b = unit_has_name(UNIT(m), e);
 292         free(e);
 293
 294         if (!b) {
 295                 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
 296                 return -EINVAL;
 297         }
 298
 299         if (m->meta.fragment_path && !m->parameters_fragment.what) {
 300                 log_error("%s's What setting is missing. Refusing.", m->meta.id);
 301                 return -EBADMSG;
 302         }
 303
 304         if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 305                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
 306                 return -EINVAL;
 307         }
 308
 309         return 0;
 310 }
 311
 312 static int mount_load(Unit *u) {
 313         Mount *m = MOUNT(u);
 314         int r;
 315
 316         assert(u);
 317         assert(u->meta.load_state == UNIT_STUB);
 318
 319         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
 320                 return r;
 321
 322         /* This is a new unit? Then let's add in some extras */
 323         if (u->meta.load_state == UNIT_LOADED) {
 324                 const char *what = NULL;
 325
 326                 if (m->meta.fragment_path)
 327                         m->from_fragment = true;
 328
 329                 if (!m->where)
 330                         if (!(m->where = unit_name_to_path(u->meta.id)))
 331                                 return -ENOMEM;
 332
 333                 path_kill_slashes(m->where);
 334
 335                 if (!m->meta.description)
 336                         if ((r = unit_set_description(u, m->where)) < 0)
 337                                 return r;
 338
 339                 if (m->from_fragment && m->parameters_fragment.what)
 340                         what = m->parameters_fragment.what;
 341                 else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
 342                         what = m->parameters_etc_fstab.what;
 343                 else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
 344                         what = m->parameters_proc_self_mountinfo.what;
 345
 346                 if (what)
 347                         if ((r = unit_add_node_link(u, what, u->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
 348                                 return r;
 349
 350                 if ((r = mount_add_mount_links(m)) < 0)
 351                         return r;
 352
 353                 if ((r = mount_add_socket_links(m)) < 0)
 354                         return r;
 355
 356                 if ((r = mount_add_swap_links(m)) < 0)
 357                         return r;
 358
 359                 if ((r = mount_add_path_links(m)) < 0)
 360                         return r;
 361
 362                 if ((r = mount_add_automount_links(m)) < 0)
 363                         return r;
 364
 365                 if ((r = mount_add_target_links(m)) < 0)
 366                         return r;
 367
 368                 if ((r = unit_add_default_cgroup(u)) < 0)
 369                         return r;
 370
 371                 if (m->meta.default_dependencies &&
 372                     m->meta.manager->running_as == MANAGER_SYSTEM &&
 373                     !path_equal(m->where, "/"))
 374                         if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
 375                                 return r;
 376         }
 377
 378         return mount_verify(m);
 379 }
 380
 381 static int mount_notify_automount(Mount *m, int status) {
 382         Unit *p;
 383         int r;
 384
 385         assert(m);
 386
 387         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
 388                 return r == -ENOENT ? 0 : r;
 389
 390         return automount_send_ready(AUTOMOUNT(p), status);
 391 }
 392
 393 static void mount_set_state(Mount *m, MountState state) {
 394         MountState old_state;
 395         assert(m);
 396
 397         old_state = m->state;
 398         m->state = state;
 399
 400         if (state != MOUNT_MOUNTING &&
 401             state != MOUNT_MOUNTING_DONE &&
 402             state != MOUNT_REMOUNTING &&
 403             state != MOUNT_UNMOUNTING &&
 404             state != MOUNT_MOUNTING_SIGTERM &&
 405             state != MOUNT_MOUNTING_SIGKILL &&
 406             state != MOUNT_UNMOUNTING_SIGTERM &&
 407             state != MOUNT_UNMOUNTING_SIGKILL &&
 408             state != MOUNT_REMOUNTING_SIGTERM &&
 409             state != MOUNT_REMOUNTING_SIGKILL) {
 410                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
 411                 mount_unwatch_control_pid(m);
 412                 m->control_command = NULL;
 413                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 414         }
 415
 416         if (state == MOUNT_MOUNTED ||
 417             state == MOUNT_REMOUNTING)
 418                 mount_notify_automount(m, 0);
 419         else if (state == MOUNT_DEAD ||
 420                  state == MOUNT_UNMOUNTING ||
 421                  state == MOUNT_MOUNTING_SIGTERM ||
 422                  state == MOUNT_MOUNTING_SIGKILL ||
 423                  state == MOUNT_REMOUNTING_SIGTERM ||
 424                  state == MOUNT_REMOUNTING_SIGKILL ||
 425                  state == MOUNT_UNMOUNTING_SIGTERM ||
 426                  state == MOUNT_UNMOUNTING_SIGKILL ||
 427                  state == MOUNT_MAINTENANCE)
 428                 mount_notify_automount(m, -ENODEV);
 429
 430         if (state != old_state)
 431                 log_debug("%s changed %s -> %s",
 432                           m->meta.id,
 433                           mount_state_to_string(old_state),
 434                           mount_state_to_string(state));
 435
 436         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
 437 }
 438
 439 static int mount_coldplug(Unit *u) {
 440         Mount *m = MOUNT(u);
 441         MountState new_state = MOUNT_DEAD;
 442         int r;
 443
 444         assert(m);
 445         assert(m->state == MOUNT_DEAD);
 446
 447         if (m->deserialized_state != m->state)
 448                 new_state = m->deserialized_state;
 449         else if (m->from_proc_self_mountinfo)
 450                 new_state = MOUNT_MOUNTED;
 451
 452         if (new_state != m->state) {
 453
 454                 if (new_state == MOUNT_MOUNTING ||
 455                     new_state == MOUNT_MOUNTING_DONE ||
 456                     new_state == MOUNT_REMOUNTING ||
 457                     new_state == MOUNT_UNMOUNTING ||
 458                     new_state == MOUNT_MOUNTING_SIGTERM ||
 459                     new_state == MOUNT_MOUNTING_SIGKILL ||
 460                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
 461                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
 462                     new_state == MOUNT_REMOUNTING_SIGTERM ||
 463                     new_state == MOUNT_REMOUNTING_SIGKILL) {
 464
 465                         if (m->control_pid <= 0)
 466                                 return -EBADMSG;
 467
 468                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
 469                                 return r;
 470
 471                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 472                                 return r;
 473                 }
 474
 475                 mount_set_state(m, new_state);
 476         }
 477
 478         return 0;
 479 }
 480
 481 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
 482         Mount *m = MOUNT(u);
 483         MountParameters *p;
 484
 485         assert(m);
 486         assert(f);
 487
 488         if (m->from_proc_self_mountinfo)
 489                 p = &m->parameters_proc_self_mountinfo;
 490         else if (m->from_fragment)
 491                 p = &m->parameters_fragment;
 492         else
 493                 p = &m->parameters_etc_fstab;
 494
 495         fprintf(f,
 496                 "%sMount State: %s\n"
 497                 "%sWhere: %s\n"
 498                 "%sWhat: %s\n"
 499                 "%sFile System Type: %s\n"
 500                 "%sOptions: %s\n"
 501                 "%sFrom /etc/fstab: %s\n"
 502                 "%sFrom /proc/self/mountinfo: %s\n"
 503                 "%sFrom fragment: %s\n"
 504                 "%sDirectoryMode: %04o\n",
 505                 prefix, mount_state_to_string(m->state),
 506                 prefix, m->where,
 507                 prefix, strna(p->what),
 508                 prefix, strna(p->fstype),
 509                 prefix, strna(p->options),
 510                 prefix, yes_no(m->from_etc_fstab),
 511                 prefix, yes_no(m->from_proc_self_mountinfo),
 512                 prefix, yes_no(m->from_fragment),
 513                 prefix, m->directory_mode);
 514
 515         if (m->control_pid > 0)
 516                 fprintf(f,
 517                         "%sControl PID: %lu\n",
 518                         prefix, (unsigned long) m->control_pid);
 519
 520         exec_context_dump(&m->exec_context, f, prefix);
 521 }
 522
 523 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 524         pid_t pid;
 525         int r;
 526
 527         assert(m);
 528         assert(c);
 529         assert(_pid);
 530
 531         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 532                 goto fail;
 533
 534         if ((r = exec_spawn(c,
 535                             NULL,
 536                             &m->exec_context,
 537                             NULL, 0,
 538                             m->meta.manager->environment,
 539                             true,
 540                             true,
 541                             true,
 542                             m->meta.manager->confirm_spawn,
 543                             m->meta.cgroup_bondings,
 544                             &pid)) < 0)
 545                 goto fail;
 546
 547         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 548                 /* FIXME: we need to do something here */
 549                 goto fail;
 550
 551         *_pid = pid;
 552
 553         return 0;
 554
 555 fail:
 556         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 557
 558         return r;
 559 }
 560
 561 static void mount_enter_dead(Mount *m, bool success) {
 562         assert(m);
 563
 564         if (!success)
 565                 m->failure = true;
 566
 567         mount_set_state(m, m->failure ? MOUNT_MAINTENANCE : MOUNT_DEAD);
 568 }
 569
 570 static void mount_enter_mounted(Mount *m, bool success) {
 571         assert(m);
 572
 573         if (!success)
 574                 m->failure = true;
 575
 576         mount_set_state(m, MOUNT_MOUNTED);
 577 }
 578
 579 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 580         int r;
 581         bool sent = false;
 582
 583         assert(m);
 584
 585         if (!success)
 586                 m->failure = true;
 587
 588         if (m->exec_context.kill_mode != KILL_NONE) {
 589                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 590                            state == MOUNT_UNMOUNTING_SIGTERM ||
 591                            state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
 592
 593                 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
 594
 595                         if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig)) < 0) {
 596                                 if (r != -EAGAIN && r != -ESRCH)
 597                                         goto fail;
 598                         } else
 599                                 sent = true;
 600                 }
 601
 602                 if (!sent && m->control_pid > 0)
 603                         if (kill(m->exec_context.kill_mode == KILL_PROCESS ?
 604                                  m->control_pid :
 605                                  -m->control_pid, sig) < 0 && errno != ESRCH) {
 606
 607                                 r = -errno;
 608                                 goto fail;
 609                         }
 610         }
 611
 612         if (sent) {
 613                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 614                         goto fail;
 615
 616                 mount_set_state(m, state);
 617         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 618                 mount_enter_mounted(m, true);
 619         else
 620                 mount_enter_dead(m, true);
 621
 622         return;
 623
 624 fail:
 625         log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
 626
 627         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 628                 mount_enter_mounted(m, false);
 629         else
 630                 mount_enter_dead(m, false);
 631 }
 632
 633 static void mount_enter_unmounting(Mount *m, bool success) {
 634         int r;
 635
 636         assert(m);
 637
 638         if (!success)
 639                 m->failure = true;
 640
 641         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 642         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 643
 644         if ((r = exec_command_set(
 645                              m->control_command,
 646                              "/bin/umount",
 647                              m->where,
 648                              NULL)) < 0)
 649                 goto fail;
 650
 651         mount_unwatch_control_pid(m);
 652
 653         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 654                 goto fail;
 655
 656         mount_set_state(m, MOUNT_UNMOUNTING);
 657
 658         return;
 659
 660 fail:
 661         log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
 662         mount_enter_mounted(m, false);
 663 }
 664
 665 static void mount_enter_mounting(Mount *m) {
 666         int r;
 667
 668         assert(m);
 669
 670         m->control_command_id = MOUNT_EXEC_MOUNT;
 671         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 672
 673         mkdir_p(m->where, m->directory_mode);
 674
 675         if (m->from_fragment)
 676                 r = exec_command_set(
 677                                 m->control_command,
 678                                 "/bin/mount",
 679                                 m->parameters_fragment.what,
 680                                 m->where,
 681                                 "-t", m->parameters_fragment.fstype,
 682                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 683                                 NULL);
 684         else if (m->from_etc_fstab)
 685                 r = exec_command_set(
 686                                 m->control_command,
 687                                 "/bin/mount",
 688                                 m->where,
 689                                 NULL);
 690         else
 691                 r = -ENOENT;
 692
 693         if (r < 0)
 694                 goto fail;
 695
 696         mount_unwatch_control_pid(m);
 697
 698         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 699                 goto fail;
 700
 701         mount_set_state(m, MOUNT_MOUNTING);
 702
 703         return;
 704
 705 fail:
 706         log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
 707         mount_enter_dead(m, false);
 708 }
 709
 710 static void mount_enter_mounting_done(Mount *m) {
 711         assert(m);
 712
 713         mount_set_state(m, MOUNT_MOUNTING_DONE);
 714 }
 715
 716 static void mount_enter_remounting(Mount *m, bool success) {
 717         int r;
 718
 719         assert(m);
 720
 721         if (!success)
 722                 m->failure = true;
 723
 724         m->control_command_id = MOUNT_EXEC_REMOUNT;
 725         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 726
 727         if (m->from_fragment) {
 728                 char *buf = NULL;
 729                 const char *o;
 730
 731                 if (m->parameters_fragment.options) {
 732                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 733                                 r = -ENOMEM;
 734                                 goto fail;
 735                         }
 736
 737                         o = buf;
 738                 } else
 739                         o = "remount";
 740
 741                 r = exec_command_set(
 742                                 m->control_command,
 743                                 "/bin/mount",
 744                                 m->parameters_fragment.what,
 745                                 m->where,
 746                                 "-t", m->parameters_fragment.fstype,
 747                                 "-o", o,
 748                                 NULL);
 749
 750                 free(buf);
 751         } else if (m->from_etc_fstab)
 752                 r = exec_command_set(
 753                                 m->control_command,
 754                                 "/bin/mount",
 755                                 m->where,
 756                                 "-o", "remount",
 757                                 NULL);
 758         else
 759                 r = -ENOENT;
 760
 761         if (r < 0) {
 762                 r = -ENOMEM;
 763                 goto fail;
 764         }
 765
 766         mount_unwatch_control_pid(m);
 767
 768         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 769                 goto fail;
 770
 771         mount_set_state(m, MOUNT_REMOUNTING);
 772
 773         return;
 774
 775 fail:
 776         mount_enter_mounted(m, false);
 777 }
 778
 779 static int mount_start(Unit *u) {
 780         Mount *m = MOUNT(u);
 781
 782         assert(m);
 783
 784         /* We cannot fulfill this request right now, try again later
 785          * please! */
 786         if (m->state == MOUNT_UNMOUNTING ||
 787             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 788             m->state == MOUNT_UNMOUNTING_SIGKILL)
 789                 return -EAGAIN;
 790
 791         /* Already on it! */
 792         if (m->state == MOUNT_MOUNTING ||
 793             m->state == MOUNT_MOUNTING_SIGTERM ||
 794             m->state == MOUNT_MOUNTING_SIGKILL)
 795                 return 0;
 796
 797         assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTENANCE);
 798
 799         m->failure = false;
 800         mount_enter_mounting(m);
 801         return 0;
 802 }
 803
 804 static int mount_stop(Unit *u) {
 805         Mount *m = MOUNT(u);
 806
 807         assert(m);
 808
 809         /* Already on it */
 810         if (m->state == MOUNT_UNMOUNTING ||
 811             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 812             m->state == MOUNT_UNMOUNTING_SIGTERM)
 813                 return 0;
 814
 815         assert(m->state == MOUNT_MOUNTING ||
 816                m->state == MOUNT_MOUNTING_DONE ||
 817                m->state == MOUNT_MOUNTED ||
 818                m->state == MOUNT_MOUNTING_SIGTERM ||
 819                m->state == MOUNT_MOUNTING_SIGKILL ||
 820                m->state == MOUNT_REMOUNTING ||
 821                m->state == MOUNT_REMOUNTING_SIGTERM ||
 822                m->state == MOUNT_REMOUNTING_SIGKILL);
 823
 824         mount_enter_unmounting(m, true);
 825         return 0;
 826 }
 827
 828 static int mount_reload(Unit *u) {
 829         Mount *m = MOUNT(u);
 830
 831         assert(m);
 832
 833         if (m->state == MOUNT_MOUNTING_DONE)
 834                 return -EAGAIN;
 835
 836         assert(m->state == MOUNT_MOUNTED);
 837
 838         mount_enter_remounting(m, true);
 839         return 0;
 840 }
 841
 842 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
 843         Mount *m = MOUNT(u);
 844
 845         assert(m);
 846         assert(f);
 847         assert(fds);
 848
 849         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
 850         unit_serialize_item(u, f, "failure", yes_no(m->failure));
 851
 852         if (m->control_pid > 0)
 853                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
 854
 855         if (m->control_command_id >= 0)
 856                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
 857
 858         return 0;
 859 }
 860
 861 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
 862         Mount *m = MOUNT(u);
 863         int r;
 864
 865         assert(u);
 866         assert(key);
 867         assert(value);
 868         assert(fds);
 869
 870         if (streq(key, "state")) {
 871                 MountState state;
 872
 873                 if ((state = mount_state_from_string(value)) < 0)
 874                         log_debug("Failed to parse state value %s", value);
 875                 else
 876                         m->deserialized_state = state;
 877         } else if (streq(key, "failure")) {
 878                 int b;
 879
 880                 if ((b = parse_boolean(value)) < 0)
 881                         log_debug("Failed to parse failure value %s", value);
 882                 else
 883                         m->failure = b || m->failure;
 884
 885         } else if (streq(key, "control-pid")) {
 886                 pid_t pid;
 887
 888                 if ((r = parse_pid(value, &pid)) < 0)
 889                         log_debug("Failed to parse control-pid value %s", value);
 890                 else
 891                         m->control_pid = pid;
 892         } else if (streq(key, "control-command")) {
 893                 MountExecCommand id;
 894
 895                 if ((id = mount_exec_command_from_string(value)) < 0)
 896                         log_debug("Failed to parse exec-command value %s", value);
 897                 else {
 898                         m->control_command_id = id;
 899                         m->control_command = m->exec_command + id;
 900                 }
 901
 902         } else
 903                 log_debug("Unknown serialization key '%s'", key);
 904
 905         return 0;
 906 }
 907
 908 static UnitActiveState mount_active_state(Unit *u) {
 909         assert(u);
 910
 911         return state_translation_table[MOUNT(u)->state];
 912 }
 913
 914 static const char *mount_sub_state_to_string(Unit *u) {
 915         assert(u);
 916
 917         return mount_state_to_string(MOUNT(u)->state);
 918 }
 919
 920 static bool mount_check_gc(Unit *u) {
 921         Mount *m = MOUNT(u);
 922
 923         assert(m);
 924
 925         return m->from_etc_fstab || m->from_proc_self_mountinfo;
 926 }
 927
 928 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
 929         Mount *m = MOUNT(u);
 930         bool success;
 931
 932         assert(m);
 933         assert(pid >= 0);
 934
 935         if (pid != m->control_pid)
 936                 return;
 937
 938         m->control_pid = 0;
 939
 940         success = is_clean_exit(code, status);
 941         m->failure = m->failure || !success;
 942
 943         if (m->control_command) {
 944                 exec_status_exit(&m->control_command->exec_status, pid, code, status);
 945                 m->control_command = NULL;
 946                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 947         }
 948
 949         log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
 950
 951         /* Note that mount(8) returning and the kernel sending us a
 952          * mount table change event might happen out-of-order. If an
 953          * operation succeed we assume the kernel will follow soon too
 954          * and already change into the resulting state.  If it fails
 955          * we check if the kernel still knows about the mount. and
 956          * change state accordingly. */
 957
 958         switch (m->state) {
 959
 960         case MOUNT_MOUNTING:
 961         case MOUNT_MOUNTING_DONE:
 962         case MOUNT_MOUNTING_SIGKILL:
 963         case MOUNT_MOUNTING_SIGTERM:
 964         case MOUNT_REMOUNTING:
 965         case MOUNT_REMOUNTING_SIGKILL:
 966         case MOUNT_REMOUNTING_SIGTERM:
 967
 968                 if (success)
 969                         mount_enter_mounted(m, true);
 970                 else if (m->from_proc_self_mountinfo)
 971                         mount_enter_mounted(m, false);
 972                 else
 973                         mount_enter_dead(m, false);
 974                 break;
 975
 976         case MOUNT_UNMOUNTING:
 977         case MOUNT_UNMOUNTING_SIGKILL:
 978         case MOUNT_UNMOUNTING_SIGTERM:
 979
 980                 if (success)
 981                         mount_enter_dead(m, true);
 982                 else if (m->from_proc_self_mountinfo)
 983                         mount_enter_mounted(m, false);
 984                 else
 985                         mount_enter_dead(m, false);
 986                 break;
 987
 988         default:
 989                 assert_not_reached("Uh, control process died at wrong time.");
 990         }
 991 }
 992
 993 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
 994         Mount *m = MOUNT(u);
 995
 996         assert(m);
 997         assert(elapsed == 1);
 998         assert(w == &m->timer_watch);
 999
1000         switch (m->state) {
1001
1002         case MOUNT_MOUNTING:
1003         case MOUNT_MOUNTING_DONE:
1004                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1005                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1006                 break;
1007
1008         case MOUNT_REMOUNTING:
1009                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1010                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1011                 break;
1012
1013         case MOUNT_UNMOUNTING:
1014                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1015                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1016                 break;
1017
1018         case MOUNT_MOUNTING_SIGTERM:
1019                 log_warning("%s mounting timed out. Killing.", u->meta.id);
1020                 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1021                 break;
1022
1023         case MOUNT_REMOUNTING_SIGTERM:
1024                 log_warning("%s remounting timed out. Killing.", u->meta.id);
1025                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1026                 break;
1027
1028         case MOUNT_UNMOUNTING_SIGTERM:
1029                 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1030                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1031                 break;
1032
1033         case MOUNT_MOUNTING_SIGKILL:
1034         case MOUNT_REMOUNTING_SIGKILL:
1035         case MOUNT_UNMOUNTING_SIGKILL:
1036                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1037
1038                 if (m->from_proc_self_mountinfo)
1039                         mount_enter_mounted(m, false);
1040                 else
1041                         mount_enter_dead(m, false);
1042                 break;
1043
1044         default:
1045                 assert_not_reached("Timeout at wrong time.");
1046         }
1047 }
1048
1049 static int mount_add_one(
1050                 Manager *m,
1051                 const char *what,
1052                 const char *where,
1053                 const char *options,
1054                 const char *fstype,
1055                 bool from_proc_self_mountinfo,
1056                 bool set_flags) {
1057         int r;
1058         Unit *u;
1059         bool delete;
1060         char *e, *w = NULL, *o = NULL, *f = NULL;
1061         MountParameters *p;
1062
1063         assert(m);
1064         assert(what);
1065         assert(where);
1066         assert(options);
1067         assert(fstype);
1068
1069         assert(!set_flags || from_proc_self_mountinfo);
1070
1071         /* Ignore API mount points. They should never be referenced in
1072          * dependencies ever. */
1073         if (mount_point_is_api(where))
1074                 return 0;
1075
1076         if (streq(fstype, "autofs"))
1077                 return 0;
1078
1079         /* probably some kind of swap, ignore */
1080         if (!is_path(where))
1081                 return 0;
1082
1083         if (!(e = unit_name_from_path(where, ".mount")))
1084                 return -ENOMEM;
1085
1086         if (!(u = manager_get_unit(m, e))) {
1087                 delete = true;
1088
1089                 if (!(u = unit_new(m))) {
1090                         free(e);
1091                         return -ENOMEM;
1092                 }
1093
1094                 r = unit_add_name(u, e);
1095                 free(e);
1096
1097                 if (r < 0)
1098                         goto fail;
1099
1100                 if (!(MOUNT(u)->where = strdup(where))) {
1101                         r = -ENOMEM;
1102                         goto fail;
1103                 }
1104
1105                 unit_add_to_load_queue(u);
1106         } else {
1107                 delete = false;
1108                 free(e);
1109         }
1110
1111         if (!(w = strdup(what)) ||
1112             !(o = strdup(options)) ||
1113             !(f = strdup(fstype))) {
1114                 r = -ENOMEM;
1115                 goto fail;
1116         }
1117
1118         if (from_proc_self_mountinfo) {
1119                 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1120
1121                 if (set_flags) {
1122                         MOUNT(u)->is_mounted = true;
1123                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1124                         MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1125                 }
1126
1127                 MOUNT(u)->from_proc_self_mountinfo = true;
1128         } else {
1129                 p = &MOUNT(u)->parameters_etc_fstab;
1130                 MOUNT(u)->from_etc_fstab = true;
1131         }
1132
1133         free(p->what);
1134         p->what = w;
1135
1136         free(p->options);
1137         p->options = o;
1138
1139         free(p->fstype);
1140         p->fstype = f;
1141
1142         unit_add_to_dbus_queue(u);
1143
1144         return 0;
1145
1146 fail:
1147         free(w);
1148         free(o);
1149         free(f);
1150
1151         if (delete && u)
1152                 unit_free(u);
1153
1154         return r;
1155 }
1156
1157 static char *fstab_node_to_udev_node(char *p) {
1158         char *dn, *t;
1159         int r;
1160
1161         /* FIXME: to follow udev's logic 100% we need to leave valid
1162          * UTF8 chars unescaped */
1163
1164         if (startswith(p, "LABEL=")) {
1165
1166                 if (!(t = xescape(p+6, "/ ")))
1167                         return NULL;
1168
1169                 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1170                 free(t);
1171
1172                 if (r < 0)
1173                         return NULL;
1174
1175                 return dn;
1176         }
1177
1178         if (startswith(p, "UUID=")) {
1179
1180                 if (!(t = xescape(p+5, "/ ")))
1181                         return NULL;
1182
1183                 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1184                 free(t);
1185
1186                 if (r < 0)
1187                         return NULL;
1188
1189                 return dn;
1190         }
1191
1192         return strdup(p);
1193 }
1194
1195 static int mount_find_pri(char *options) {
1196         char *end, *pri;
1197         unsigned long r;
1198
1199         if (!(pri = mount_test_option(options, "pri=")))
1200                 return 0;
1201
1202         pri += 4;
1203
1204         errno = 0;
1205         r = strtoul(pri, &end, 10);
1206
1207         if (errno != 0)
1208                 return -errno;
1209
1210         if (end == pri || (*end != ',' && *end != 0))
1211                 return -EINVAL;
1212
1213         return (int) r;
1214 }
1215
1216 static int mount_load_etc_fstab(Manager *m) {
1217         FILE *f;
1218         int r;
1219         struct mntent* me;
1220
1221         assert(m);
1222
1223         errno = 0;
1224         if (!(f = setmntent("/etc/fstab", "r")))
1225                 return -errno;
1226
1227         while ((me = getmntent(f))) {
1228                 char *where, *what;
1229
1230                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1231                         r = -ENOMEM;
1232                         goto finish;
1233                 }
1234
1235                 if (!(where = strdup(me->mnt_dir))) {
1236                         free(what);
1237                         r = -ENOMEM;
1238                         goto finish;
1239                 }
1240
1241                 if (what[0] == '/')
1242                         path_kill_slashes(what);
1243
1244                 if (where[0] == '/')
1245                         path_kill_slashes(where);
1246
1247                 if (streq(me->mnt_type, "swap")) {
1248                         int pri;
1249
1250                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1251                                 r = pri;
1252                         else
1253                                 r = swap_add_one(m,
1254                                                  what,
1255                                                  pri,
1256                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1257                                                  !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1258                                                  false);
1259                 } else
1260                         r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1261
1262                 free(what);
1263                 free(where);
1264
1265                 if (r < 0)
1266                         goto finish;
1267         }
1268
1269         r = 0;
1270 finish:
1271
1272         endmntent(f);
1273         return r;
1274 }
1275
1276 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1277         int r;
1278         char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1279
1280         assert(m);
1281
1282         rewind(m->proc_self_mountinfo);
1283
1284         for (;;) {
1285                 int k;
1286
1287                 device = path = options = options2 = fstype = d = p = o = NULL;
1288
1289                 if ((k = fscanf(m->proc_self_mountinfo,
1290                                 "%*s "       /* (1) mount id */
1291                                 "%*s "       /* (2) parent id */
1292                                 "%*s "       /* (3) major:minor */
1293                                 "%*s "       /* (4) root */
1294                                 "%ms "       /* (5) mount point */
1295                                 "%ms"        /* (6) mount options */
1296                                 "%*[^-]"     /* (7) optional fields */
1297                                 "- "         /* (8) seperator */
1298                                 "%ms "       /* (9) file system type */
1299                                 "%ms"        /* (10) mount source */
1300                                 "%ms"        /* (11) mount options 2 */
1301                                 "%*[^\n]",   /* some rubbish at the end */
1302                                 &path,
1303                                 &options,
1304                                 &fstype,
1305                                 &device,
1306                                 &options2)) != 5) {
1307
1308                         if (k == EOF)
1309                                 break;
1310
1311                         r = -EBADMSG;
1312                         goto finish;
1313                 }
1314
1315                 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1316                         r = -ENOMEM;
1317                         goto finish;
1318                 }
1319
1320                 if (!(d = cunescape(device)) ||
1321                     !(p = cunescape(path))) {
1322                         r = -ENOMEM;
1323                         goto finish;
1324                 }
1325
1326                 if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1327                         goto finish;
1328
1329                 free(device);
1330                 free(path);
1331                 free(options);
1332                 free(options2);
1333                 free(fstype);
1334                 free(d);
1335                 free(p);
1336                 free(o);
1337         }
1338
1339         r = 0;
1340
1341 finish:
1342         free(device);
1343         free(path);
1344         free(options);
1345         free(options2);
1346         free(fstype);
1347         free(d);
1348         free(p);
1349         free(o);
1350
1351         return r;
1352 }
1353
1354 static void mount_shutdown(Manager *m) {
1355         assert(m);
1356
1357         if (m->proc_self_mountinfo) {
1358                 fclose(m->proc_self_mountinfo);
1359                 m->proc_self_mountinfo = NULL;
1360         }
1361 }
1362
1363 static int mount_enumerate(Manager *m) {
1364         int r;
1365         struct epoll_event ev;
1366         assert(m);
1367
1368         if (!m->proc_self_mountinfo) {
1369                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1370                         return -errno;
1371
1372                 m->mount_watch.type = WATCH_MOUNT;
1373                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1374
1375                 zero(ev);
1376                 ev.events = EPOLLERR;
1377                 ev.data.ptr = &m->mount_watch;
1378
1379                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1380                         return -errno;
1381         }
1382
1383         if ((r = mount_load_etc_fstab(m)) < 0)
1384                 goto fail;
1385
1386         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1387                 goto fail;
1388
1389         return 0;
1390
1391 fail:
1392         mount_shutdown(m);
1393         return r;
1394 }
1395
1396 void mount_fd_event(Manager *m, int events) {
1397         Meta *meta;
1398         int r;
1399
1400         assert(m);
1401         assert(events == EPOLLERR);
1402
1403         /* The manager calls this for every fd event happening on the
1404          * /proc/self/mountinfo file, which informs us about mounting
1405          * table changes */
1406
1407         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1408                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(errno));
1409
1410                 /* Reset flags, just in case, for later calls */
1411                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1412                         Mount *mount = (Mount*) meta;
1413
1414                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1415                 }
1416
1417                 return;
1418         }
1419
1420         manager_dispatch_load_queue(m);
1421
1422         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1423                 Mount *mount = (Mount*) meta;
1424
1425                 if (!mount->is_mounted) {
1426                         /* This has just been unmounted. */
1427
1428                         mount->from_proc_self_mountinfo = false;
1429
1430                         switch (mount->state) {
1431
1432                         case MOUNT_MOUNTED:
1433                                 mount_enter_dead(mount, true);
1434                                 break;
1435
1436                         default:
1437                                 mount_set_state(mount, mount->state);
1438                                 break;
1439
1440                         }
1441
1442                 } else if (mount->just_mounted || mount->just_changed) {
1443
1444                         /* New or changed entrymount */
1445
1446                         switch (mount->state) {
1447
1448                         case MOUNT_DEAD:
1449                         case MOUNT_MAINTENANCE:
1450                                 mount_enter_mounted(mount, true);
1451                                 break;
1452
1453                         case MOUNT_MOUNTING:
1454                                 mount_enter_mounting_done(mount);
1455                                 break;
1456
1457                         default:
1458                                 /* Nothing really changed, but let's
1459                                  * issue an notification call
1460                                  * nonetheless, in case somebody is
1461                                  * waiting for this. (e.g. file system
1462                                  * ro/rw remounts.) */
1463                                 mount_set_state(mount, mount->state);
1464                                 break;
1465                         }
1466                 }
1467
1468                 /* Reset the flags for later calls */
1469                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1470         }
1471 }
1472
1473 int mount_path_is_mounted(Manager *m, const char* path) {
1474         char *t;
1475         int r;
1476
1477         assert(m);
1478         assert(path);
1479
1480         if (path[0] != '/')
1481                 return 1;
1482
1483         if (!(t = strdup(path)))
1484                 return -ENOMEM;
1485
1486         path_kill_slashes(t);
1487
1488         for (;;) {
1489                 char *e, *slash;
1490                 Unit *u;
1491
1492                 if (!(e = unit_name_from_path(t, ".mount"))) {
1493                         r = -ENOMEM;
1494                         goto finish;
1495                 }
1496
1497                 u = manager_get_unit(m, e);
1498                 free(e);
1499
1500                 if (u &&
1501                     (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1502                     MOUNT(u)->state != MOUNT_MOUNTED) {
1503                         r = 0;
1504                         goto finish;
1505                 }
1506
1507                 assert_se(slash = strrchr(t, '/'));
1508
1509                 if (slash == t) {
1510                         r = 1;
1511                         goto finish;
1512                 }
1513
1514                 *slash = 0;
1515         }
1516
1517         r = 1;
1518
1519 finish:
1520         free(t);
1521         return r;
1522 }
1523
1524 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1525         [MOUNT_DEAD] = "dead",
1526         [MOUNT_MOUNTING] = "mounting",
1527         [MOUNT_MOUNTING_DONE] = "mounting-done",
1528         [MOUNT_MOUNTED] = "mounted",
1529         [MOUNT_REMOUNTING] = "remounting",
1530         [MOUNT_UNMOUNTING] = "unmounting",
1531         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1532         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1533         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1534         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1535         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1536         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1537         [MOUNT_MAINTENANCE] = "maintenance"
1538 };
1539
1540 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1541
1542 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1543         [MOUNT_EXEC_MOUNT] = "ExecMount",
1544         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1545         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1546 };
1547
1548 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1549
1550 const UnitVTable mount_vtable = {
1551         .suffix = ".mount",
1552
1553         .no_alias = true,
1554         .no_instances = true,
1555         .no_isolate = true,
1556         .show_status = true,
1557
1558         .init = mount_init,
1559         .load = mount_load,
1560         .done = mount_done,
1561
1562         .coldplug = mount_coldplug,
1563
1564         .dump = mount_dump,
1565
1566         .start = mount_start,
1567         .stop = mount_stop,
1568         .reload = mount_reload,
1569
1570         .serialize = mount_serialize,
1571         .deserialize_item = mount_deserialize_item,
1572
1573         .active_state = mount_active_state,
1574         .sub_state_to_string = mount_sub_state_to_string,
1575
1576         .check_gc = mount_check_gc,
1577
1578         .sigchld_event = mount_sigchld_event,
1579         .timer_event = mount_timer_event,
1580
1581         .bus_message_handler = bus_mount_message_handler,
1582
1583         .enumerate = mount_enumerate,
1584         .shutdown = mount_shutdown
1585 };