src/mount.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   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 "dbus-mount.h"
  37 #include "special.h"
  38
  39 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
  40         [MOUNT_DEAD] = UNIT_INACTIVE,
  41         [MOUNT_MOUNTING] = UNIT_ACTIVATING,
  42         [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
  43         [MOUNT_MOUNTED] = UNIT_ACTIVE,
  44         [MOUNT_REMOUNTING] = UNIT_RELOADING,
  45         [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
  46         [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  47         [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  48         [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
  49         [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
  50         [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
  51         [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
  52         [MOUNT_FAILED] = UNIT_FAILED
  53 };
  54
  55 static void mount_init(Unit *u) {
  56         Mount *m = MOUNT(u);
  57
  58         assert(u);
  59         assert(u->meta.load_state == UNIT_STUB);
  60
  61         m->timeout_usec = DEFAULT_TIMEOUT_USEC;
  62         m->directory_mode = 0755;
  63
  64         exec_context_init(&m->exec_context);
  65
  66         /* We need to make sure that /bin/mount is always called in
  67          * the same process group as us, so that the autofs kernel
  68          * side doesn't send us another mount request while we are
  69          * already trying to comply its last one. */
  70         m->exec_context.same_pgrp = true;
  71
  72         m->timer_watch.type = WATCH_INVALID;
  73
  74         m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
  75 }
  76
  77 static void mount_unwatch_control_pid(Mount *m) {
  78         assert(m);
  79
  80         if (m->control_pid <= 0)
  81                 return;
  82
  83         unit_unwatch_pid(UNIT(m), m->control_pid);
  84         m->control_pid = 0;
  85 }
  86
  87 static void mount_parameters_done(MountParameters *p) {
  88         assert(p);
  89
  90         free(p->what);
  91         free(p->options);
  92         free(p->fstype);
  93
  94         p->what = p->options = p->fstype = NULL;
  95 }
  96
  97 static void mount_done(Unit *u) {
  98         Mount *m = MOUNT(u);
  99
 100         assert(m);
 101
 102         free(m->where);
 103         m->where = NULL;
 104
 105         mount_parameters_done(&m->parameters_etc_fstab);
 106         mount_parameters_done(&m->parameters_proc_self_mountinfo);
 107         mount_parameters_done(&m->parameters_fragment);
 108
 109         exec_context_done(&m->exec_context);
 110         exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
 111         m->control_command = NULL;
 112
 113         mount_unwatch_control_pid(m);
 114
 115         unit_unwatch_timer(u, &m->timer_watch);
 116 }
 117
 118 static int mount_add_mount_links(Mount *m) {
 119         Meta *other;
 120         int r;
 121         MountParameters *pm;
 122
 123         assert(m);
 124
 125         if (m->from_fragment)
 126                 pm = &m->parameters_fragment;
 127         else if (m->from_etc_fstab)
 128                 pm = &m->parameters_etc_fstab;
 129         else
 130                 pm = NULL;
 131
 132         /* Adds in links to other mount points that might lie below or
 133          * above us in the hierarchy */
 134
 135         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
 136                 Mount *n = (Mount*) other;
 137                 MountParameters *pn;
 138
 139                 if (n == m)
 140                         continue;
 141
 142                 if (n->meta.load_state != UNIT_LOADED)
 143                         continue;
 144
 145                 if (n->from_fragment)
 146                         pn = &n->parameters_fragment;
 147                 else if (n->from_etc_fstab)
 148                         pn = &n->parameters_etc_fstab;
 149                 else
 150                         pn = NULL;
 151
 152                 if (path_startswith(m->where, n->where)) {
 153
 154                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 155                                 return r;
 156
 157                         if (n->from_etc_fstab || n->from_fragment)
 158                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 159                                         return r;
 160
 161                 } else if (path_startswith(n->where, m->where)) {
 162
 163                         if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
 164                                 return r;
 165
 166                         if (m->from_etc_fstab || m->from_fragment)
 167                                 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 168                                         return r;
 169
 170                 } else if (pm && path_startswith(pm->what, n->where)) {
 171
 172                         if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
 173                                 return r;
 174
 175                         if (m->from_etc_fstab || m->from_fragment)
 176                                 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
 177                                         return r;
 178
 179                 } else if (pn && path_startswith(pn->what, m->where)) {
 180
 181                         if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
 182                                 return r;
 183
 184                         if (n->from_etc_fstab || n->from_fragment)
 185                                 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
 186                                         return r;
 187                 }
 188         }
 189
 190         return 0;
 191 }
 192
 193 static int mount_add_swap_links(Mount *m) {
 194         Meta *other;
 195         int r;
 196
 197         assert(m);
 198
 199         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
 200                 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
 201                         return r;
 202
 203         return 0;
 204 }
 205
 206 static int mount_add_path_links(Mount *m) {
 207         Meta *other;
 208         int r;
 209
 210         assert(m);
 211
 212         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
 213                 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
 214                         return r;
 215
 216         return 0;
 217 }
 218
 219 static int mount_add_automount_links(Mount *m) {
 220         Meta *other;
 221         int r;
 222
 223         assert(m);
 224
 225         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
 226                 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
 227                         return r;
 228
 229         return 0;
 230 }
 231
 232 static int mount_add_socket_links(Mount *m) {
 233         Meta *other;
 234         int r;
 235
 236         assert(m);
 237
 238         LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
 239                 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
 240                         return r;
 241
 242         return 0;
 243 }
 244
 245 static char* mount_test_option(const char *haystack, const char *needle) {
 246         struct mntent me;
 247
 248         assert(needle);
 249
 250         /* Like glibc's hasmntopt(), but works on a string, not a
 251          * struct mntent */
 252
 253         if (!haystack)
 254                 return false;
 255
 256         zero(me);
 257         me.mnt_opts = (char*) haystack;
 258
 259         return hasmntopt(&me, needle);
 260 }
 261
 262 static int mount_add_target_links(Mount *m) {
 263         const char *target, *after = NULL;
 264         MountParameters *p;
 265         Unit *tu;
 266         int r;
 267         bool noauto, handle, automount, user;
 268
 269         assert(m);
 270
 271         if (m->from_fragment)
 272                 p = &m->parameters_fragment;
 273         else if (m->from_etc_fstab)
 274                 p = &m->parameters_etc_fstab;
 275         else
 276                 return 0;
 277
 278         noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 279         user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users");
 280         handle = !!mount_test_option(p->options, "comment=systemd.mount") ||
 281                 m->meta.manager->mount_auto;
 282         automount = !!mount_test_option(p->options, "comment=systemd.automount");
 283
 284         if (mount_test_option(p->options, "_netdev") ||
 285             (p->fstype && fstype_is_network(p->fstype))) {
 286                 target = SPECIAL_REMOTE_FS_TARGET;
 287
 288                 if (m->meta.manager->running_as == MANAGER_SYSTEM)
 289                         after = SPECIAL_NETWORK_TARGET;
 290         } else
 291                 target = SPECIAL_LOCAL_FS_TARGET;
 292
 293         if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
 294                 return r;
 295
 296         if (after)
 297                 if ((r = unit_add_dependency_by_name(tu, UNIT_AFTER, after, NULL, true)) < 0)
 298                         return r;
 299
 300         if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
 301                 Unit *am;
 302
 303                 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
 304                         return r;
 305
 306                 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
 307         } else {
 308
 309                 /* Automatically add mount points that aren't natively
 310                  * configured to local-fs.target */
 311                 if (!noauto &&
 312                     handle &&
 313                     !m->from_fragment)
 314                         if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
 315                                 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
 316                                         return r;
 317
 318                 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
 319         }
 320 }
 321
 322 static bool mount_is_bind(MountParameters *p) {
 323         assert(p);
 324
 325         if (p->fstype && streq(p->fstype, "bind"))
 326                 return true;
 327
 328         if (mount_test_option(p->options, "bind"))
 329                 return true;
 330
 331         return false;
 332 }
 333
 334 static int mount_add_device_links(Mount *m) {
 335         MountParameters *p;
 336         int r;
 337
 338         assert(m);
 339
 340         if (m->from_fragment)
 341                 p = &m->parameters_fragment;
 342         else if (m->from_etc_fstab)
 343                 p = &m->parameters_etc_fstab;
 344         else
 345                 return 0;
 346
 347         if (!p->what)
 348                 return 0;
 349
 350         if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
 351                 bool nofail, noauto;
 352
 353                 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
 354                 nofail = !!mount_test_option(p->options, "nofail");
 355
 356                 if ((r = unit_add_node_link(UNIT(m), p->what,
 357                                             !noauto && nofail &&
 358                                             UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
 359                         return r;
 360         }
 361
 362         if (p->passno > 0 &&
 363             UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM) {
 364                 char *name;
 365                 Unit *fsck;
 366                 /* Let's add in the fsck service */
 367
 368                 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
 369                         return -ENOMEM;
 370
 371                 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
 372                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
 373                         free(name);
 374                         return r;
 375                 }
 376
 377                 free(name);
 378
 379                 SERVICE(fsck)->fsck_passno = p->passno;
 380
 381                 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_WANTS, fsck, true)) < 0)
 382                         return r;
 383         }
 384
 385         return 0;
 386 }
 387
 388 static int mount_add_default_dependencies(Mount *m) {
 389         int r;
 390
 391         assert(m);
 392
 393         if (m->meta.manager->running_as == MANAGER_SYSTEM &&
 394             !path_equal(m->where, "/")) {
 395
 396                 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_FSCK_TARGET, NULL, true)) < 0)
 397                         return r;
 398
 399                 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
 400                         return r;
 401         }
 402
 403         return 0;
 404 }
 405
 406 static int mount_verify(Mount *m) {
 407         bool b;
 408         char *e;
 409         assert(m);
 410
 411         if (m->meta.load_state != UNIT_LOADED)
 412                 return 0;
 413
 414         if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
 415                 return -ENOENT;
 416
 417         if (!(e = unit_name_from_path(m->where, ".mount")))
 418                 return -ENOMEM;
 419
 420         b = unit_has_name(UNIT(m), e);
 421         free(e);
 422
 423         if (!b) {
 424                 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
 425                 return -EINVAL;
 426         }
 427
 428         if (m->meta.fragment_path && !m->parameters_fragment.what) {
 429                 log_error("%s's What setting is missing. Refusing.", m->meta.id);
 430                 return -EBADMSG;
 431         }
 432
 433         if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 434                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
 435                 return -EINVAL;
 436         }
 437
 438         return 0;
 439 }
 440
 441 static int mount_load(Unit *u) {
 442         Mount *m = MOUNT(u);
 443         int r;
 444
 445         assert(u);
 446         assert(u->meta.load_state == UNIT_STUB);
 447
 448         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
 449                 return r;
 450
 451         /* This is a new unit? Then let's add in some extras */
 452         if (u->meta.load_state == UNIT_LOADED) {
 453                 if (m->meta.fragment_path)
 454                         m->from_fragment = true;
 455
 456                 if (!m->where)
 457                         if (!(m->where = unit_name_to_path(u->meta.id)))
 458                                 return -ENOMEM;
 459
 460                 path_kill_slashes(m->where);
 461
 462                 if (!m->meta.description)
 463                         if ((r = unit_set_description(u, m->where)) < 0)
 464                                 return r;
 465
 466                 if ((r = mount_add_device_links(m)) < 0)
 467                         return r;
 468
 469                 if ((r = mount_add_mount_links(m)) < 0)
 470                         return r;
 471
 472                 if ((r = mount_add_socket_links(m)) < 0)
 473                         return r;
 474
 475                 if ((r = mount_add_swap_links(m)) < 0)
 476                         return r;
 477
 478                 if ((r = mount_add_path_links(m)) < 0)
 479                         return r;
 480
 481                 if ((r = mount_add_automount_links(m)) < 0)
 482                         return r;
 483
 484                 if ((r = mount_add_target_links(m)) < 0)
 485                         return r;
 486
 487                 if ((r = unit_add_default_cgroup(u)) < 0)
 488                         return r;
 489
 490                 if (m->meta.default_dependencies)
 491                         if ((r = mount_add_default_dependencies(m)) < 0)
 492                                 return r;
 493         }
 494
 495         return mount_verify(m);
 496 }
 497
 498 static int mount_notify_automount(Mount *m, int status) {
 499         Unit *p;
 500         int r;
 501
 502         assert(m);
 503
 504         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
 505                 return r == -ENOENT ? 0 : r;
 506
 507         return automount_send_ready(AUTOMOUNT(p), status);
 508 }
 509
 510 static void mount_set_state(Mount *m, MountState state) {
 511         MountState old_state;
 512         assert(m);
 513
 514         old_state = m->state;
 515         m->state = state;
 516
 517         if (state != MOUNT_MOUNTING &&
 518             state != MOUNT_MOUNTING_DONE &&
 519             state != MOUNT_REMOUNTING &&
 520             state != MOUNT_UNMOUNTING &&
 521             state != MOUNT_MOUNTING_SIGTERM &&
 522             state != MOUNT_MOUNTING_SIGKILL &&
 523             state != MOUNT_UNMOUNTING_SIGTERM &&
 524             state != MOUNT_UNMOUNTING_SIGKILL &&
 525             state != MOUNT_REMOUNTING_SIGTERM &&
 526             state != MOUNT_REMOUNTING_SIGKILL) {
 527                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
 528                 mount_unwatch_control_pid(m);
 529                 m->control_command = NULL;
 530                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
 531         }
 532
 533         if (state == MOUNT_MOUNTED ||
 534             state == MOUNT_REMOUNTING)
 535                 mount_notify_automount(m, 0);
 536         else if (state == MOUNT_DEAD ||
 537                  state == MOUNT_UNMOUNTING ||
 538                  state == MOUNT_MOUNTING_SIGTERM ||
 539                  state == MOUNT_MOUNTING_SIGKILL ||
 540                  state == MOUNT_REMOUNTING_SIGTERM ||
 541                  state == MOUNT_REMOUNTING_SIGKILL ||
 542                  state == MOUNT_UNMOUNTING_SIGTERM ||
 543                  state == MOUNT_UNMOUNTING_SIGKILL ||
 544                  state == MOUNT_FAILED)
 545                 mount_notify_automount(m, -ENODEV);
 546
 547         if (state != old_state)
 548                 log_debug("%s changed %s -> %s",
 549                           m->meta.id,
 550                           mount_state_to_string(old_state),
 551                           mount_state_to_string(state));
 552
 553         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
 554 }
 555
 556 static int mount_coldplug(Unit *u) {
 557         Mount *m = MOUNT(u);
 558         MountState new_state = MOUNT_DEAD;
 559         int r;
 560
 561         assert(m);
 562         assert(m->state == MOUNT_DEAD);
 563
 564         if (m->deserialized_state != m->state)
 565                 new_state = m->deserialized_state;
 566         else if (m->from_proc_self_mountinfo)
 567                 new_state = MOUNT_MOUNTED;
 568
 569         if (new_state != m->state) {
 570
 571                 if (new_state == MOUNT_MOUNTING ||
 572                     new_state == MOUNT_MOUNTING_DONE ||
 573                     new_state == MOUNT_REMOUNTING ||
 574                     new_state == MOUNT_UNMOUNTING ||
 575                     new_state == MOUNT_MOUNTING_SIGTERM ||
 576                     new_state == MOUNT_MOUNTING_SIGKILL ||
 577                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
 578                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
 579                     new_state == MOUNT_REMOUNTING_SIGTERM ||
 580                     new_state == MOUNT_REMOUNTING_SIGKILL) {
 581
 582                         if (m->control_pid <= 0)
 583                                 return -EBADMSG;
 584
 585                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
 586                                 return r;
 587
 588                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 589                                 return r;
 590                 }
 591
 592                 mount_set_state(m, new_state);
 593         }
 594
 595         return 0;
 596 }
 597
 598 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
 599         Mount *m = MOUNT(u);
 600         MountParameters *p;
 601
 602         assert(m);
 603         assert(f);
 604
 605         if (m->from_proc_self_mountinfo)
 606                 p = &m->parameters_proc_self_mountinfo;
 607         else if (m->from_fragment)
 608                 p = &m->parameters_fragment;
 609         else
 610                 p = &m->parameters_etc_fstab;
 611
 612         fprintf(f,
 613                 "%sMount State: %s\n"
 614                 "%sWhere: %s\n"
 615                 "%sWhat: %s\n"
 616                 "%sFile System Type: %s\n"
 617                 "%sOptions: %s\n"
 618                 "%sFrom /etc/fstab: %s\n"
 619                 "%sFrom /proc/self/mountinfo: %s\n"
 620                 "%sFrom fragment: %s\n"
 621                 "%sDirectoryMode: %04o\n",
 622                 prefix, mount_state_to_string(m->state),
 623                 prefix, m->where,
 624                 prefix, strna(p->what),
 625                 prefix, strna(p->fstype),
 626                 prefix, strna(p->options),
 627                 prefix, yes_no(m->from_etc_fstab),
 628                 prefix, yes_no(m->from_proc_self_mountinfo),
 629                 prefix, yes_no(m->from_fragment),
 630                 prefix, m->directory_mode);
 631
 632         if (m->control_pid > 0)
 633                 fprintf(f,
 634                         "%sControl PID: %lu\n",
 635                         prefix, (unsigned long) m->control_pid);
 636
 637         exec_context_dump(&m->exec_context, f, prefix);
 638 }
 639
 640 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
 641         pid_t pid;
 642         int r;
 643
 644         assert(m);
 645         assert(c);
 646         assert(_pid);
 647
 648         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 649                 goto fail;
 650
 651         if ((r = exec_spawn(c,
 652                             NULL,
 653                             &m->exec_context,
 654                             NULL, 0,
 655                             m->meta.manager->environment,
 656                             true,
 657                             true,
 658                             true,
 659                             m->meta.manager->confirm_spawn,
 660                             m->meta.cgroup_bondings,
 661                             &pid)) < 0)
 662                 goto fail;
 663
 664         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
 665                 /* FIXME: we need to do something here */
 666                 goto fail;
 667
 668         *_pid = pid;
 669
 670         return 0;
 671
 672 fail:
 673         unit_unwatch_timer(UNIT(m), &m->timer_watch);
 674
 675         return r;
 676 }
 677
 678 static void mount_enter_dead(Mount *m, bool success) {
 679         assert(m);
 680
 681         if (!success)
 682                 m->failure = true;
 683
 684         mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
 685 }
 686
 687 static void mount_enter_mounted(Mount *m, bool success) {
 688         assert(m);
 689
 690         if (!success)
 691                 m->failure = true;
 692
 693         mount_set_state(m, MOUNT_MOUNTED);
 694 }
 695
 696 static void mount_enter_signal(Mount *m, MountState state, bool success) {
 697         int r;
 698         Set *pid_set = NULL;
 699         bool wait_for_exit = false;
 700
 701         assert(m);
 702
 703         if (!success)
 704                 m->failure = true;
 705
 706         if (m->exec_context.kill_mode != KILL_NONE) {
 707                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
 708                            state == MOUNT_UNMOUNTING_SIGTERM ||
 709                            state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
 710
 711                 if (m->control_pid > 0) {
 712                         if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
 713                                  -m->control_pid :
 714                                  m->control_pid, sig) < 0 && errno != ESRCH)
 715
 716                                 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
 717                         else
 718                                 wait_for_exit = true;
 719                 }
 720
 721                 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
 722
 723                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
 724                                 r = -ENOMEM;
 725                                 goto fail;
 726                         }
 727
 728                         /* Exclude the control pid from being killed via the cgroup */
 729                         if (m->control_pid > 0)
 730                                 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
 731                                         goto fail;
 732
 733                         if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
 734                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
 735                                         log_warning("Failed to kill control group: %s", strerror(-r));
 736                         } else if (r > 0)
 737                                 wait_for_exit = true;
 738
 739                         set_free(pid_set);
 740                 }
 741         }
 742
 743         if (wait_for_exit) {
 744                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
 745                         goto fail;
 746
 747                 mount_set_state(m, state);
 748         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 749                 mount_enter_mounted(m, true);
 750         else
 751                 mount_enter_dead(m, true);
 752
 753         return;
 754
 755 fail:
 756         log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
 757
 758         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
 759                 mount_enter_mounted(m, false);
 760         else
 761                 mount_enter_dead(m, false);
 762
 763         if (pid_set)
 764                 set_free(pid_set);
 765 }
 766
 767 static void mount_enter_unmounting(Mount *m, bool success) {
 768         int r;
 769
 770         assert(m);
 771
 772         if (!success)
 773                 m->failure = true;
 774
 775         m->control_command_id = MOUNT_EXEC_UNMOUNT;
 776         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
 777
 778         if ((r = exec_command_set(
 779                              m->control_command,
 780                              "/bin/umount",
 781                              m->where,
 782                              NULL)) < 0)
 783                 goto fail;
 784
 785         mount_unwatch_control_pid(m);
 786
 787         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 788                 goto fail;
 789
 790         mount_set_state(m, MOUNT_UNMOUNTING);
 791
 792         return;
 793
 794 fail:
 795         log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
 796         mount_enter_mounted(m, false);
 797 }
 798
 799 static void mount_enter_mounting(Mount *m) {
 800         int r;
 801
 802         assert(m);
 803
 804         m->control_command_id = MOUNT_EXEC_MOUNT;
 805         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
 806
 807         mkdir_p(m->where, m->directory_mode);
 808
 809         if (m->from_fragment)
 810                 r = exec_command_set(
 811                                 m->control_command,
 812                                 "/bin/mount",
 813                                 m->parameters_fragment.what,
 814                                 m->where,
 815                                 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
 816                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
 817                                 NULL);
 818         else if (m->from_etc_fstab)
 819                 r = exec_command_set(
 820                                 m->control_command,
 821                                 "/bin/mount",
 822                                 m->where,
 823                                 NULL);
 824         else
 825                 r = -ENOENT;
 826
 827         if (r < 0)
 828                 goto fail;
 829
 830         mount_unwatch_control_pid(m);
 831
 832         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 833                 goto fail;
 834
 835         mount_set_state(m, MOUNT_MOUNTING);
 836
 837         return;
 838
 839 fail:
 840         log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
 841         mount_enter_dead(m, false);
 842 }
 843
 844 static void mount_enter_mounting_done(Mount *m) {
 845         assert(m);
 846
 847         mount_set_state(m, MOUNT_MOUNTING_DONE);
 848 }
 849
 850 static void mount_enter_remounting(Mount *m, bool success) {
 851         int r;
 852
 853         assert(m);
 854
 855         if (!success)
 856                 m->failure = true;
 857
 858         m->control_command_id = MOUNT_EXEC_REMOUNT;
 859         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
 860
 861         if (m->from_fragment) {
 862                 char *buf = NULL;
 863                 const char *o;
 864
 865                 if (m->parameters_fragment.options) {
 866                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
 867                                 r = -ENOMEM;
 868                                 goto fail;
 869                         }
 870
 871                         o = buf;
 872                 } else
 873                         o = "remount";
 874
 875                 r = exec_command_set(
 876                                 m->control_command,
 877                                 "/bin/mount",
 878                                 m->parameters_fragment.what,
 879                                 m->where,
 880                                 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
 881                                 "-o", o,
 882                                 NULL);
 883
 884                 free(buf);
 885         } else if (m->from_etc_fstab)
 886                 r = exec_command_set(
 887                                 m->control_command,
 888                                 "/bin/mount",
 889                                 m->where,
 890                                 "-o", "remount",
 891                                 NULL);
 892         else
 893                 r = -ENOENT;
 894
 895         if (r < 0)
 896                 goto fail;
 897
 898         mount_unwatch_control_pid(m);
 899
 900         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
 901                 goto fail;
 902
 903         mount_set_state(m, MOUNT_REMOUNTING);
 904
 905         return;
 906
 907 fail:
 908         log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
 909         mount_enter_mounted(m, false);
 910 }
 911
 912 static int mount_start(Unit *u) {
 913         Mount *m = MOUNT(u);
 914
 915         assert(m);
 916
 917         /* We cannot fulfill this request right now, try again later
 918          * please! */
 919         if (m->state == MOUNT_UNMOUNTING ||
 920             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 921             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 922             m->state == MOUNT_MOUNTING_SIGTERM ||
 923             m->state == MOUNT_MOUNTING_SIGKILL)
 924                 return -EAGAIN;
 925
 926         /* Already on it! */
 927         if (m->state == MOUNT_MOUNTING)
 928                 return 0;
 929
 930         assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
 931
 932         m->failure = false;
 933         mount_enter_mounting(m);
 934         return 0;
 935 }
 936
 937 static int mount_stop(Unit *u) {
 938         Mount *m = MOUNT(u);
 939
 940         assert(m);
 941
 942         /* Already on it */
 943         if (m->state == MOUNT_UNMOUNTING ||
 944             m->state == MOUNT_UNMOUNTING_SIGKILL ||
 945             m->state == MOUNT_UNMOUNTING_SIGTERM ||
 946             m->state == MOUNT_MOUNTING_SIGTERM ||
 947             m->state == MOUNT_MOUNTING_SIGKILL)
 948                 return 0;
 949
 950         assert(m->state == MOUNT_MOUNTING ||
 951                m->state == MOUNT_MOUNTING_DONE ||
 952                m->state == MOUNT_MOUNTED ||
 953                m->state == MOUNT_REMOUNTING ||
 954                m->state == MOUNT_REMOUNTING_SIGTERM ||
 955                m->state == MOUNT_REMOUNTING_SIGKILL);
 956
 957         mount_enter_unmounting(m, true);
 958         return 0;
 959 }
 960
 961 static int mount_reload(Unit *u) {
 962         Mount *m = MOUNT(u);
 963
 964         assert(m);
 965
 966         if (m->state == MOUNT_MOUNTING_DONE)
 967                 return -EAGAIN;
 968
 969         assert(m->state == MOUNT_MOUNTED);
 970
 971         mount_enter_remounting(m, true);
 972         return 0;
 973 }
 974
 975 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
 976         Mount *m = MOUNT(u);
 977
 978         assert(m);
 979         assert(f);
 980         assert(fds);
 981
 982         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
 983         unit_serialize_item(u, f, "failure", yes_no(m->failure));
 984
 985         if (m->control_pid > 0)
 986                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
 987
 988         if (m->control_command_id >= 0)
 989                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
 990
 991         return 0;
 992 }
 993
 994 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
 995         Mount *m = MOUNT(u);
 996
 997         assert(u);
 998         assert(key);
 999         assert(value);
1000         assert(fds);
1001
1002         if (streq(key, "state")) {
1003                 MountState state;
1004
1005                 if ((state = mount_state_from_string(value)) < 0)
1006                         log_debug("Failed to parse state value %s", value);
1007                 else
1008                         m->deserialized_state = state;
1009         } else if (streq(key, "failure")) {
1010                 int b;
1011
1012                 if ((b = parse_boolean(value)) < 0)
1013                         log_debug("Failed to parse failure value %s", value);
1014                 else
1015                         m->failure = b || m->failure;
1016
1017         } else if (streq(key, "control-pid")) {
1018                 pid_t pid;
1019
1020                 if (parse_pid(value, &pid) < 0)
1021                         log_debug("Failed to parse control-pid value %s", value);
1022                 else
1023                         m->control_pid = pid;
1024         } else if (streq(key, "control-command")) {
1025                 MountExecCommand id;
1026
1027                 if ((id = mount_exec_command_from_string(value)) < 0)
1028                         log_debug("Failed to parse exec-command value %s", value);
1029                 else {
1030                         m->control_command_id = id;
1031                         m->control_command = m->exec_command + id;
1032                 }
1033
1034         } else
1035                 log_debug("Unknown serialization key '%s'", key);
1036
1037         return 0;
1038 }
1039
1040 static UnitActiveState mount_active_state(Unit *u) {
1041         assert(u);
1042
1043         return state_translation_table[MOUNT(u)->state];
1044 }
1045
1046 static const char *mount_sub_state_to_string(Unit *u) {
1047         assert(u);
1048
1049         return mount_state_to_string(MOUNT(u)->state);
1050 }
1051
1052 static bool mount_check_gc(Unit *u) {
1053         Mount *m = MOUNT(u);
1054
1055         assert(m);
1056
1057         return m->from_etc_fstab || m->from_proc_self_mountinfo;
1058 }
1059
1060 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1061         Mount *m = MOUNT(u);
1062         bool success;
1063
1064         assert(m);
1065         assert(pid >= 0);
1066
1067         if (pid != m->control_pid)
1068                 return;
1069
1070         m->control_pid = 0;
1071
1072         success = is_clean_exit(code, status);
1073         m->failure = m->failure || !success;
1074
1075         if (m->control_command) {
1076                 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1077                 m->control_command = NULL;
1078                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1079         }
1080
1081         log_full(success ? LOG_DEBUG : LOG_NOTICE,
1082                  "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1083
1084         /* Note that mount(8) returning and the kernel sending us a
1085          * mount table change event might happen out-of-order. If an
1086          * operation succeed we assume the kernel will follow soon too
1087          * and already change into the resulting state.  If it fails
1088          * we check if the kernel still knows about the mount. and
1089          * change state accordingly. */
1090
1091         switch (m->state) {
1092
1093         case MOUNT_MOUNTING:
1094         case MOUNT_MOUNTING_DONE:
1095         case MOUNT_MOUNTING_SIGKILL:
1096         case MOUNT_MOUNTING_SIGTERM:
1097         case MOUNT_REMOUNTING:
1098         case MOUNT_REMOUNTING_SIGKILL:
1099         case MOUNT_REMOUNTING_SIGTERM:
1100
1101                 if (success)
1102                         mount_enter_mounted(m, true);
1103                 else if (m->from_proc_self_mountinfo)
1104                         mount_enter_mounted(m, false);
1105                 else
1106                         mount_enter_dead(m, false);
1107                 break;
1108
1109         case MOUNT_UNMOUNTING:
1110         case MOUNT_UNMOUNTING_SIGKILL:
1111         case MOUNT_UNMOUNTING_SIGTERM:
1112
1113                 if (success)
1114                         mount_enter_dead(m, true);
1115                 else if (m->from_proc_self_mountinfo)
1116                         mount_enter_mounted(m, false);
1117                 else
1118                         mount_enter_dead(m, false);
1119                 break;
1120
1121         default:
1122                 assert_not_reached("Uh, control process died at wrong time.");
1123         }
1124
1125         /* Notify clients about changed exit status */
1126         unit_add_to_dbus_queue(u);
1127 }
1128
1129 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1130         Mount *m = MOUNT(u);
1131
1132         assert(m);
1133         assert(elapsed == 1);
1134         assert(w == &m->timer_watch);
1135
1136         switch (m->state) {
1137
1138         case MOUNT_MOUNTING:
1139         case MOUNT_MOUNTING_DONE:
1140                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1141                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1142                 break;
1143
1144         case MOUNT_REMOUNTING:
1145                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1146                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1147                 break;
1148
1149         case MOUNT_UNMOUNTING:
1150                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1151                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1152                 break;
1153
1154         case MOUNT_MOUNTING_SIGTERM:
1155                 log_warning("%s mounting timed out. Killing.", u->meta.id);
1156                 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1157                 break;
1158
1159         case MOUNT_REMOUNTING_SIGTERM:
1160                 log_warning("%s remounting timed out. Killing.", u->meta.id);
1161                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1162                 break;
1163
1164         case MOUNT_UNMOUNTING_SIGTERM:
1165                 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1166                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1167                 break;
1168
1169         case MOUNT_MOUNTING_SIGKILL:
1170         case MOUNT_REMOUNTING_SIGKILL:
1171         case MOUNT_UNMOUNTING_SIGKILL:
1172                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1173
1174                 if (m->from_proc_self_mountinfo)
1175                         mount_enter_mounted(m, false);
1176                 else
1177                         mount_enter_dead(m, false);
1178                 break;
1179
1180         default:
1181                 assert_not_reached("Timeout at wrong time.");
1182         }
1183 }
1184
1185 static int mount_add_one(
1186                 Manager *m,
1187                 const char *what,
1188                 const char *where,
1189                 const char *options,
1190                 const char *fstype,
1191                 int passno,
1192                 bool from_proc_self_mountinfo,
1193                 bool set_flags) {
1194         int r;
1195         Unit *u;
1196         bool delete;
1197         char *e, *w = NULL, *o = NULL, *f = NULL;
1198         MountParameters *p;
1199
1200         assert(m);
1201         assert(what);
1202         assert(where);
1203         assert(options);
1204         assert(fstype);
1205
1206         assert(!set_flags || from_proc_self_mountinfo);
1207
1208         /* Ignore API mount points. They should never be referenced in
1209          * dependencies ever. */
1210         if (mount_point_is_api(where))
1211                 return 0;
1212
1213         if (streq(fstype, "autofs"))
1214                 return 0;
1215
1216         /* probably some kind of swap, ignore */
1217         if (!is_path(where))
1218                 return 0;
1219
1220         if (!(e = unit_name_from_path(where, ".mount")))
1221                 return -ENOMEM;
1222
1223         if (!(u = manager_get_unit(m, e))) {
1224                 delete = true;
1225
1226                 if (!(u = unit_new(m))) {
1227                         free(e);
1228                         return -ENOMEM;
1229                 }
1230
1231                 r = unit_add_name(u, e);
1232                 free(e);
1233
1234                 if (r < 0)
1235                         goto fail;
1236
1237                 if (!(MOUNT(u)->where = strdup(where))) {
1238                         r = -ENOMEM;
1239                         goto fail;
1240                 }
1241
1242                 unit_add_to_load_queue(u);
1243         } else {
1244                 delete = false;
1245                 free(e);
1246         }
1247
1248         if (!(w = strdup(what)) ||
1249             !(o = strdup(options)) ||
1250             !(f = strdup(fstype))) {
1251                 r = -ENOMEM;
1252                 goto fail;
1253         }
1254
1255         if (from_proc_self_mountinfo) {
1256                 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1257
1258                 if (set_flags) {
1259                         MOUNT(u)->is_mounted = true;
1260                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1261                         MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1262                 }
1263
1264                 MOUNT(u)->from_proc_self_mountinfo = true;
1265         } else {
1266                 p = &MOUNT(u)->parameters_etc_fstab;
1267                 MOUNT(u)->from_etc_fstab = true;
1268         }
1269
1270         free(p->what);
1271         p->what = w;
1272
1273         free(p->options);
1274         p->options = o;
1275
1276         free(p->fstype);
1277         p->fstype = f;
1278
1279         p->passno = passno;
1280
1281         unit_add_to_dbus_queue(u);
1282
1283         return 0;
1284
1285 fail:
1286         free(w);
1287         free(o);
1288         free(f);
1289
1290         if (delete && u)
1291                 unit_free(u);
1292
1293         return r;
1294 }
1295
1296 static char *fstab_node_to_udev_node(char *p) {
1297         char *dn, *t, *u;
1298         int r;
1299
1300         /* FIXME: to follow udev's logic 100% we need to leave valid
1301          * UTF8 chars unescaped */
1302
1303         if (startswith(p, "LABEL=")) {
1304
1305                 if (!(u = unquote(p+6, "\"\'")))
1306                         return NULL;
1307
1308                 t = xescape(u, "/ ");
1309                 free(u);
1310
1311                 if (!t)
1312                         return NULL;
1313
1314                 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1315                 free(t);
1316
1317                 if (r < 0)
1318                         return NULL;
1319
1320                 return dn;
1321         }
1322
1323         if (startswith(p, "UUID=")) {
1324
1325                 if (!(u = unquote(p+5, "\"\'")))
1326                         return NULL;
1327
1328                 t = xescape(u, "/ ");
1329                 free(u);
1330
1331                 if (!t)
1332                         return NULL;
1333
1334                 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1335                 free(t);
1336
1337                 if (r < 0)
1338                         return NULL;
1339
1340                 return dn;
1341         }
1342
1343         return strdup(p);
1344 }
1345
1346 static int mount_find_pri(char *options) {
1347         char *end, *pri;
1348         unsigned long r;
1349
1350         if (!(pri = mount_test_option(options, "pri=")))
1351                 return 0;
1352
1353         pri += 4;
1354
1355         errno = 0;
1356         r = strtoul(pri, &end, 10);
1357
1358         if (errno != 0)
1359                 return -errno;
1360
1361         if (end == pri || (*end != ',' && *end != 0))
1362                 return -EINVAL;
1363
1364         return (int) r;
1365 }
1366
1367 static int mount_load_etc_fstab(Manager *m) {
1368         FILE *f;
1369         int r = 0;
1370         struct mntent* me;
1371
1372         assert(m);
1373
1374         errno = 0;
1375         if (!(f = setmntent("/etc/fstab", "r")))
1376                 return -errno;
1377
1378         while ((me = getmntent(f))) {
1379                 char *where, *what;
1380                 int k;
1381
1382                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1383                         r = -ENOMEM;
1384                         goto finish;
1385                 }
1386
1387                 if (!(where = strdup(me->mnt_dir))) {
1388                         free(what);
1389                         r = -ENOMEM;
1390                         goto finish;
1391                 }
1392
1393                 if (what[0] == '/')
1394                         path_kill_slashes(what);
1395
1396                 if (where[0] == '/')
1397                         path_kill_slashes(where);
1398
1399                 if (streq(me->mnt_type, "swap")) {
1400                         int pri;
1401
1402                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1403                                 k = pri;
1404                         else
1405                                 k = swap_add_one(m,
1406                                                  what,
1407                                                  NULL,
1408                                                  pri,
1409                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1410                                                  !!mount_test_option(me->mnt_opts, "nofail"),
1411                                                  !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1412                                                  false);
1413                 } else
1414                         k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1415
1416                 free(what);
1417                 free(where);
1418
1419                 if (r < 0)
1420                         r = k;
1421         }
1422
1423 finish:
1424
1425         endmntent(f);
1426         return r;
1427 }
1428
1429 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1430         int r = 0;
1431         unsigned i;
1432         char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1433
1434         assert(m);
1435
1436         rewind(m->proc_self_mountinfo);
1437
1438         for (i = 1;; i++) {
1439                 int k;
1440
1441                 device = path = options = options2 = fstype = d = p = o = NULL;
1442
1443                 if ((k = fscanf(m->proc_self_mountinfo,
1444                                 "%*s "       /* (1) mount id */
1445                                 "%*s "       /* (2) parent id */
1446                                 "%*s "       /* (3) major:minor */
1447                                 "%*s "       /* (4) root */
1448                                 "%ms "       /* (5) mount point */
1449                                 "%ms"        /* (6) mount options */
1450                                 "%*[^-]"     /* (7) optional fields */
1451                                 "- "         /* (8) separator */
1452                                 "%ms "       /* (9) file system type */
1453                                 "%ms"        /* (10) mount source */
1454                                 "%ms"        /* (11) mount options 2 */
1455                                 "%*[^\n]",   /* some rubbish at the end */
1456                                 &path,
1457                                 &options,
1458                                 &fstype,
1459                                 &device,
1460                                 &options2)) != 5) {
1461
1462                         if (k == EOF)
1463                                 break;
1464
1465                         log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1466                         goto clean_up;
1467                 }
1468
1469                 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1470                         r = -ENOMEM;
1471                         goto finish;
1472                 }
1473
1474                 if (!(d = cunescape(device)) ||
1475                     !(p = cunescape(path))) {
1476                         r = -ENOMEM;
1477                         goto finish;
1478                 }
1479
1480                 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1481                         r = k;
1482
1483 clean_up:
1484                 free(device);
1485                 free(path);
1486                 free(options);
1487                 free(options2);
1488                 free(fstype);
1489                 free(d);
1490                 free(p);
1491                 free(o);
1492         }
1493
1494 finish:
1495         free(device);
1496         free(path);
1497         free(options);
1498         free(options2);
1499         free(fstype);
1500         free(d);
1501         free(p);
1502         free(o);
1503
1504         return r;
1505 }
1506
1507 static void mount_shutdown(Manager *m) {
1508         assert(m);
1509
1510         if (m->proc_self_mountinfo) {
1511                 fclose(m->proc_self_mountinfo);
1512                 m->proc_self_mountinfo = NULL;
1513         }
1514 }
1515
1516 static int mount_enumerate(Manager *m) {
1517         int r;
1518         struct epoll_event ev;
1519         assert(m);
1520
1521         if (!m->proc_self_mountinfo) {
1522                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1523                         return -errno;
1524
1525                 m->mount_watch.type = WATCH_MOUNT;
1526                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1527
1528                 zero(ev);
1529                 ev.events = EPOLLERR;
1530                 ev.data.ptr = &m->mount_watch;
1531
1532                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1533                         return -errno;
1534         }
1535
1536         if ((r = mount_load_etc_fstab(m)) < 0)
1537                 goto fail;
1538
1539         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1540                 goto fail;
1541
1542         return 0;
1543
1544 fail:
1545         mount_shutdown(m);
1546         return r;
1547 }
1548
1549 void mount_fd_event(Manager *m, int events) {
1550         Meta *meta;
1551         int r;
1552
1553         assert(m);
1554         assert(events == EPOLLERR);
1555
1556         /* The manager calls this for every fd event happening on the
1557          * /proc/self/mountinfo file, which informs us about mounting
1558          * table changes */
1559
1560         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1561                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1562
1563                 /* Reset flags, just in case, for later calls */
1564                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1565                         Mount *mount = (Mount*) meta;
1566
1567                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1568                 }
1569
1570                 return;
1571         }
1572
1573         manager_dispatch_load_queue(m);
1574
1575         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1576                 Mount *mount = (Mount*) meta;
1577
1578                 if (!mount->is_mounted) {
1579                         /* This has just been unmounted. */
1580
1581                         mount->from_proc_self_mountinfo = false;
1582
1583                         switch (mount->state) {
1584
1585                         case MOUNT_MOUNTED:
1586                                 mount_enter_dead(mount, true);
1587                                 break;
1588
1589                         default:
1590                                 mount_set_state(mount, mount->state);
1591                                 break;
1592
1593                         }
1594
1595                 } else if (mount->just_mounted || mount->just_changed) {
1596
1597                         /* New or changed mount entry */
1598
1599                         switch (mount->state) {
1600
1601                         case MOUNT_DEAD:
1602                         case MOUNT_FAILED:
1603                                 mount_enter_mounted(mount, true);
1604                                 break;
1605
1606                         case MOUNT_MOUNTING:
1607                                 mount_enter_mounting_done(mount);
1608                                 break;
1609
1610                         default:
1611                                 /* Nothing really changed, but let's
1612                                  * issue an notification call
1613                                  * nonetheless, in case somebody is
1614                                  * waiting for this. (e.g. file system
1615                                  * ro/rw remounts.) */
1616                                 mount_set_state(mount, mount->state);
1617                                 break;
1618                         }
1619                 }
1620
1621                 /* Reset the flags for later calls */
1622                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1623         }
1624 }
1625
1626 static void mount_reset_failed(Unit *u) {
1627         Mount *m = MOUNT(u);
1628
1629         assert(m);
1630
1631         if (m->state == MOUNT_FAILED)
1632                 mount_set_state(m, MOUNT_DEAD);
1633
1634         m->failure = false;
1635 }
1636
1637 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1638         [MOUNT_DEAD] = "dead",
1639         [MOUNT_MOUNTING] = "mounting",
1640         [MOUNT_MOUNTING_DONE] = "mounting-done",
1641         [MOUNT_MOUNTED] = "mounted",
1642         [MOUNT_REMOUNTING] = "remounting",
1643         [MOUNT_UNMOUNTING] = "unmounting",
1644         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1645         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1646         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1647         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1648         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1649         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1650         [MOUNT_FAILED] = "failed"
1651 };
1652
1653 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1654
1655 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1656         [MOUNT_EXEC_MOUNT] = "ExecMount",
1657         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1658         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1659 };
1660
1661 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1662
1663 const UnitVTable mount_vtable = {
1664         .suffix = ".mount",
1665
1666         .no_alias = true,
1667         .no_instances = true,
1668         .no_isolate = true,
1669         .show_status = true,
1670
1671         .init = mount_init,
1672         .load = mount_load,
1673         .done = mount_done,
1674
1675         .coldplug = mount_coldplug,
1676
1677         .dump = mount_dump,
1678
1679         .start = mount_start,
1680         .stop = mount_stop,
1681         .reload = mount_reload,
1682
1683         .serialize = mount_serialize,
1684         .deserialize_item = mount_deserialize_item,
1685
1686         .active_state = mount_active_state,
1687         .sub_state_to_string = mount_sub_state_to_string,
1688
1689         .check_gc = mount_check_gc,
1690
1691         .sigchld_event = mount_sigchld_event,
1692         .timer_event = mount_timer_event,
1693
1694         .reset_failed = mount_reset_failed,
1695
1696         .bus_interface = "org.freedesktop.systemd1.Mount",
1697         .bus_message_handler = bus_mount_message_handler,
1698         .bus_invalidating_properties =  bus_mount_invalidating_properties,
1699
1700         .enumerate = mount_enumerate,
1701         .shutdown = mount_shutdown
1702 };