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[thirdparty/systemd.git] / 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 /* Cann't do this right now. */
810 if (m->state == MOUNT_MOUNTING ||
811 m->state == MOUNT_MOUNTING_DONE ||
812 m->state == MOUNT_MOUNTING_SIGTERM ||
813 m->state == MOUNT_MOUNTING_SIGKILL ||
814 m->state == MOUNT_REMOUNTING ||
815 m->state == MOUNT_REMOUNTING_SIGTERM ||
816 m->state == MOUNT_REMOUNTING_SIGKILL)
817 return -EAGAIN;
818
819 /* Already on it */
820 if (m->state == MOUNT_UNMOUNTING ||
821 m->state == MOUNT_UNMOUNTING_SIGKILL ||
822 m->state == MOUNT_UNMOUNTING_SIGTERM)
823 return 0;
824
825 assert(m->state == MOUNT_MOUNTED);
826
827 mount_enter_unmounting(m, true);
828 return 0;
829 }
830
831 static int mount_reload(Unit *u) {
832 Mount *m = MOUNT(u);
833
834 assert(m);
835
836 if (m->state == MOUNT_MOUNTING_DONE)
837 return -EAGAIN;
838
839 assert(m->state == MOUNT_MOUNTED);
840
841 mount_enter_remounting(m, true);
842 return 0;
843 }
844
845 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
846 Mount *m = MOUNT(u);
847
848 assert(m);
849 assert(f);
850 assert(fds);
851
852 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
853 unit_serialize_item(u, f, "failure", yes_no(m->failure));
854
855 if (m->control_pid > 0)
856 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
857
858 if (m->control_command_id >= 0)
859 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
860
861 return 0;
862 }
863
864 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
865 Mount *m = MOUNT(u);
866 int r;
867
868 assert(u);
869 assert(key);
870 assert(value);
871 assert(fds);
872
873 if (streq(key, "state")) {
874 MountState state;
875
876 if ((state = mount_state_from_string(value)) < 0)
877 log_debug("Failed to parse state value %s", value);
878 else
879 m->deserialized_state = state;
880 } else if (streq(key, "failure")) {
881 int b;
882
883 if ((b = parse_boolean(value)) < 0)
884 log_debug("Failed to parse failure value %s", value);
885 else
886 m->failure = b || m->failure;
887
888 } else if (streq(key, "control-pid")) {
889 pid_t pid;
890
891 if ((r = parse_pid(value, &pid)) < 0)
892 log_debug("Failed to parse control-pid value %s", value);
893 else
894 m->control_pid = pid;
895 } else if (streq(key, "control-command")) {
896 MountExecCommand id;
897
898 if ((id = mount_exec_command_from_string(value)) < 0)
899 log_debug("Failed to parse exec-command value %s", value);
900 else {
901 m->control_command_id = id;
902 m->control_command = m->exec_command + id;
903 }
904
905 } else
906 log_debug("Unknown serialization key '%s'", key);
907
908 return 0;
909 }
910
911 static UnitActiveState mount_active_state(Unit *u) {
912 assert(u);
913
914 return state_translation_table[MOUNT(u)->state];
915 }
916
917 static const char *mount_sub_state_to_string(Unit *u) {
918 assert(u);
919
920 return mount_state_to_string(MOUNT(u)->state);
921 }
922
923 static bool mount_check_gc(Unit *u) {
924 Mount *m = MOUNT(u);
925
926 assert(m);
927
928 return m->from_etc_fstab || m->from_proc_self_mountinfo;
929 }
930
931 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
932 Mount *m = MOUNT(u);
933 bool success;
934
935 assert(m);
936 assert(pid >= 0);
937
938 if (pid != m->control_pid)
939 return;
940
941 m->control_pid = 0;
942
943 success = is_clean_exit(code, status);
944 m->failure = m->failure || !success;
945
946 if (m->control_command) {
947 exec_status_exit(&m->control_command->exec_status, pid, code, status);
948 m->control_command = NULL;
949 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
950 }
951
952 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
953
954 /* Note that mount(8) returning and the kernel sending us a
955 * mount table change event might happen out-of-order. If an
956 * operation succeed we assume the kernel will follow soon too
957 * and already change into the resulting state. If it fails
958 * we check if the kernel still knows about the mount. and
959 * change state accordingly. */
960
961 switch (m->state) {
962
963 case MOUNT_MOUNTING:
964 case MOUNT_MOUNTING_DONE:
965 case MOUNT_MOUNTING_SIGKILL:
966 case MOUNT_MOUNTING_SIGTERM:
967 case MOUNT_REMOUNTING:
968 case MOUNT_REMOUNTING_SIGKILL:
969 case MOUNT_REMOUNTING_SIGTERM:
970
971 if (success)
972 mount_enter_mounted(m, true);
973 else if (m->from_proc_self_mountinfo)
974 mount_enter_mounted(m, false);
975 else
976 mount_enter_dead(m, false);
977 break;
978
979 case MOUNT_UNMOUNTING:
980 case MOUNT_UNMOUNTING_SIGKILL:
981 case MOUNT_UNMOUNTING_SIGTERM:
982
983 if (success)
984 mount_enter_dead(m, true);
985 else if (m->from_proc_self_mountinfo)
986 mount_enter_mounted(m, false);
987 else
988 mount_enter_dead(m, false);
989 break;
990
991 default:
992 assert_not_reached("Uh, control process died at wrong time.");
993 }
994 }
995
996 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
997 Mount *m = MOUNT(u);
998
999 assert(m);
1000 assert(elapsed == 1);
1001 assert(w == &m->timer_watch);
1002
1003 switch (m->state) {
1004
1005 case MOUNT_MOUNTING:
1006 case MOUNT_MOUNTING_DONE:
1007 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1008 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1009 break;
1010
1011 case MOUNT_REMOUNTING:
1012 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1013 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1014 break;
1015
1016 case MOUNT_UNMOUNTING:
1017 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1018 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1019 break;
1020
1021 case MOUNT_MOUNTING_SIGTERM:
1022 log_warning("%s mounting timed out. Killing.", u->meta.id);
1023 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1024 break;
1025
1026 case MOUNT_REMOUNTING_SIGTERM:
1027 log_warning("%s remounting timed out. Killing.", u->meta.id);
1028 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1029 break;
1030
1031 case MOUNT_UNMOUNTING_SIGTERM:
1032 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1033 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1034 break;
1035
1036 case MOUNT_MOUNTING_SIGKILL:
1037 case MOUNT_REMOUNTING_SIGKILL:
1038 case MOUNT_UNMOUNTING_SIGKILL:
1039 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1040
1041 if (m->from_proc_self_mountinfo)
1042 mount_enter_mounted(m, false);
1043 else
1044 mount_enter_dead(m, false);
1045 break;
1046
1047 default:
1048 assert_not_reached("Timeout at wrong time.");
1049 }
1050 }
1051
1052 static int mount_add_one(
1053 Manager *m,
1054 const char *what,
1055 const char *where,
1056 const char *options,
1057 const char *fstype,
1058 bool from_proc_self_mountinfo,
1059 bool set_flags) {
1060 int r;
1061 Unit *u;
1062 bool delete;
1063 char *e, *w = NULL, *o = NULL, *f = NULL;
1064 MountParameters *p;
1065
1066 assert(m);
1067 assert(what);
1068 assert(where);
1069 assert(options);
1070 assert(fstype);
1071
1072 assert(!set_flags || from_proc_self_mountinfo);
1073
1074 /* Ignore API mount points. They should never be referenced in
1075 * dependencies ever. */
1076 if (mount_point_is_api(where))
1077 return 0;
1078
1079 if (streq(fstype, "autofs"))
1080 return 0;
1081
1082 /* probably some kind of swap, ignore */
1083 if (!is_path(where))
1084 return 0;
1085
1086 if (!(e = unit_name_from_path(where, ".mount")))
1087 return -ENOMEM;
1088
1089 if (!(u = manager_get_unit(m, e))) {
1090 delete = true;
1091
1092 if (!(u = unit_new(m))) {
1093 free(e);
1094 return -ENOMEM;
1095 }
1096
1097 r = unit_add_name(u, e);
1098 free(e);
1099
1100 if (r < 0)
1101 goto fail;
1102
1103 if (!(MOUNT(u)->where = strdup(where))) {
1104 r = -ENOMEM;
1105 goto fail;
1106 }
1107
1108 unit_add_to_load_queue(u);
1109 } else {
1110 delete = false;
1111 free(e);
1112 }
1113
1114 if (!(w = strdup(what)) ||
1115 !(o = strdup(options)) ||
1116 !(f = strdup(fstype))) {
1117 r = -ENOMEM;
1118 goto fail;
1119 }
1120
1121 if (from_proc_self_mountinfo) {
1122 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1123
1124 if (set_flags) {
1125 MOUNT(u)->is_mounted = true;
1126 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1127 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1128 }
1129
1130 MOUNT(u)->from_proc_self_mountinfo = true;
1131 } else {
1132 p = &MOUNT(u)->parameters_etc_fstab;
1133 MOUNT(u)->from_etc_fstab = true;
1134 }
1135
1136 free(p->what);
1137 p->what = w;
1138
1139 free(p->options);
1140 p->options = o;
1141
1142 free(p->fstype);
1143 p->fstype = f;
1144
1145 unit_add_to_dbus_queue(u);
1146
1147 return 0;
1148
1149 fail:
1150 free(w);
1151 free(o);
1152 free(f);
1153
1154 if (delete && u)
1155 unit_free(u);
1156
1157 return r;
1158 }
1159
1160 static char *fstab_node_to_udev_node(char *p) {
1161 char *dn, *t;
1162 int r;
1163
1164 /* FIXME: to follow udev's logic 100% we need to leave valid
1165 * UTF8 chars unescaped */
1166
1167 if (startswith(p, "LABEL=")) {
1168
1169 if (!(t = xescape(p+6, "/ ")))
1170 return NULL;
1171
1172 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1173 free(t);
1174
1175 if (r < 0)
1176 return NULL;
1177
1178 return dn;
1179 }
1180
1181 if (startswith(p, "UUID=")) {
1182
1183 if (!(t = xescape(p+5, "/ ")))
1184 return NULL;
1185
1186 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1187 free(t);
1188
1189 if (r < 0)
1190 return NULL;
1191
1192 return dn;
1193 }
1194
1195 return strdup(p);
1196 }
1197
1198 static int mount_find_pri(char *options) {
1199 char *end, *pri;
1200 unsigned long r;
1201
1202 if (!(pri = mount_test_option(options, "pri=")))
1203 return 0;
1204
1205 pri += 4;
1206
1207 errno = 0;
1208 r = strtoul(pri, &end, 10);
1209
1210 if (errno != 0)
1211 return -errno;
1212
1213 if (end == pri || (*end != ',' && *end != 0))
1214 return -EINVAL;
1215
1216 return (int) r;
1217 }
1218
1219 static int mount_load_etc_fstab(Manager *m) {
1220 FILE *f;
1221 int r;
1222 struct mntent* me;
1223
1224 assert(m);
1225
1226 errno = 0;
1227 if (!(f = setmntent("/etc/fstab", "r")))
1228 return -errno;
1229
1230 while ((me = getmntent(f))) {
1231 char *where, *what;
1232
1233 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1234 r = -ENOMEM;
1235 goto finish;
1236 }
1237
1238 if (!(where = strdup(me->mnt_dir))) {
1239 free(what);
1240 r = -ENOMEM;
1241 goto finish;
1242 }
1243
1244 if (what[0] == '/')
1245 path_kill_slashes(what);
1246
1247 if (where[0] == '/')
1248 path_kill_slashes(where);
1249
1250 if (streq(me->mnt_type, "swap")) {
1251 int pri;
1252
1253 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1254 r = pri;
1255 else
1256 r = swap_add_one(m,
1257 what,
1258 pri,
1259 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1260 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1261 false);
1262 } else
1263 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1264
1265 free(what);
1266 free(where);
1267
1268 if (r < 0)
1269 goto finish;
1270 }
1271
1272 r = 0;
1273 finish:
1274
1275 endmntent(f);
1276 return r;
1277 }
1278
1279 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1280 int r;
1281 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1282
1283 assert(m);
1284
1285 rewind(m->proc_self_mountinfo);
1286
1287 for (;;) {
1288 int k;
1289
1290 device = path = options = options2 = fstype = d = p = o = NULL;
1291
1292 if ((k = fscanf(m->proc_self_mountinfo,
1293 "%*s " /* (1) mount id */
1294 "%*s " /* (2) parent id */
1295 "%*s " /* (3) major:minor */
1296 "%*s " /* (4) root */
1297 "%ms " /* (5) mount point */
1298 "%ms" /* (6) mount options */
1299 "%*[^-]" /* (7) optional fields */
1300 "- " /* (8) seperator */
1301 "%ms " /* (9) file system type */
1302 "%ms" /* (10) mount source */
1303 "%ms" /* (11) mount options 2 */
1304 "%*[^\n]", /* some rubbish at the end */
1305 &path,
1306 &options,
1307 &fstype,
1308 &device,
1309 &options2)) != 5) {
1310
1311 if (k == EOF)
1312 break;
1313
1314 r = -EBADMSG;
1315 goto finish;
1316 }
1317
1318 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1319 r = -ENOMEM;
1320 goto finish;
1321 }
1322
1323 if (!(d = cunescape(device)) ||
1324 !(p = cunescape(path))) {
1325 r = -ENOMEM;
1326 goto finish;
1327 }
1328
1329 if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1330 goto finish;
1331
1332 free(device);
1333 free(path);
1334 free(options);
1335 free(options2);
1336 free(fstype);
1337 free(d);
1338 free(p);
1339 free(o);
1340 }
1341
1342 r = 0;
1343
1344 finish:
1345 free(device);
1346 free(path);
1347 free(options);
1348 free(options2);
1349 free(fstype);
1350 free(d);
1351 free(p);
1352 free(o);
1353
1354 return r;
1355 }
1356
1357 static void mount_shutdown(Manager *m) {
1358 assert(m);
1359
1360 if (m->proc_self_mountinfo) {
1361 fclose(m->proc_self_mountinfo);
1362 m->proc_self_mountinfo = NULL;
1363 }
1364 }
1365
1366 static int mount_enumerate(Manager *m) {
1367 int r;
1368 struct epoll_event ev;
1369 assert(m);
1370
1371 if (!m->proc_self_mountinfo) {
1372 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1373 return -errno;
1374
1375 m->mount_watch.type = WATCH_MOUNT;
1376 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1377
1378 zero(ev);
1379 ev.events = EPOLLERR;
1380 ev.data.ptr = &m->mount_watch;
1381
1382 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1383 return -errno;
1384 }
1385
1386 if ((r = mount_load_etc_fstab(m)) < 0)
1387 goto fail;
1388
1389 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1390 goto fail;
1391
1392 return 0;
1393
1394 fail:
1395 mount_shutdown(m);
1396 return r;
1397 }
1398
1399 void mount_fd_event(Manager *m, int events) {
1400 Meta *meta;
1401 int r;
1402
1403 assert(m);
1404 assert(events == EPOLLERR);
1405
1406 /* The manager calls this for every fd event happening on the
1407 * /proc/self/mountinfo file, which informs us about mounting
1408 * table changes */
1409
1410 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1411 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(errno));
1412
1413 /* Reset flags, just in case, for later calls */
1414 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1415 Mount *mount = (Mount*) meta;
1416
1417 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1418 }
1419
1420 return;
1421 }
1422
1423 manager_dispatch_load_queue(m);
1424
1425 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1426 Mount *mount = (Mount*) meta;
1427
1428 if (!mount->is_mounted) {
1429 /* This has just been unmounted. */
1430
1431 mount->from_proc_self_mountinfo = false;
1432
1433 switch (mount->state) {
1434
1435 case MOUNT_MOUNTED:
1436 mount_enter_dead(mount, true);
1437 break;
1438
1439 default:
1440 mount_set_state(mount, mount->state);
1441 break;
1442
1443 }
1444
1445 } else if (mount->just_mounted || mount->just_changed) {
1446
1447 /* New or changed entrymount */
1448
1449 switch (mount->state) {
1450
1451 case MOUNT_DEAD:
1452 case MOUNT_MAINTENANCE:
1453 mount_enter_mounted(mount, true);
1454 break;
1455
1456 case MOUNT_MOUNTING:
1457 mount_enter_mounting_done(mount);
1458 break;
1459
1460 default:
1461 /* Nothing really changed, but let's
1462 * issue an notification call
1463 * nonetheless, in case somebody is
1464 * waiting for this. (e.g. file system
1465 * ro/rw remounts.) */
1466 mount_set_state(mount, mount->state);
1467 break;
1468 }
1469 }
1470
1471 /* Reset the flags for later calls */
1472 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1473 }
1474 }
1475
1476 int mount_path_is_mounted(Manager *m, const char* path) {
1477 char *t;
1478 int r;
1479
1480 assert(m);
1481 assert(path);
1482
1483 if (path[0] != '/')
1484 return 1;
1485
1486 if (!(t = strdup(path)))
1487 return -ENOMEM;
1488
1489 path_kill_slashes(t);
1490
1491 for (;;) {
1492 char *e, *slash;
1493 Unit *u;
1494
1495 if (!(e = unit_name_from_path(t, ".mount"))) {
1496 r = -ENOMEM;
1497 goto finish;
1498 }
1499
1500 u = manager_get_unit(m, e);
1501 free(e);
1502
1503 if (u &&
1504 (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1505 MOUNT(u)->state != MOUNT_MOUNTED) {
1506 r = 0;
1507 goto finish;
1508 }
1509
1510 assert_se(slash = strrchr(t, '/'));
1511
1512 if (slash == t) {
1513 r = 1;
1514 goto finish;
1515 }
1516
1517 *slash = 0;
1518 }
1519
1520 r = 1;
1521
1522 finish:
1523 free(t);
1524 return r;
1525 }
1526
1527 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1528 [MOUNT_DEAD] = "dead",
1529 [MOUNT_MOUNTING] = "mounting",
1530 [MOUNT_MOUNTING_DONE] = "mounting-done",
1531 [MOUNT_MOUNTED] = "mounted",
1532 [MOUNT_REMOUNTING] = "remounting",
1533 [MOUNT_UNMOUNTING] = "unmounting",
1534 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1535 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1536 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1537 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1538 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1539 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1540 [MOUNT_MAINTENANCE] = "maintenance"
1541 };
1542
1543 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1544
1545 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1546 [MOUNT_EXEC_MOUNT] = "ExecMount",
1547 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1548 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1549 };
1550
1551 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1552
1553 const UnitVTable mount_vtable = {
1554 .suffix = ".mount",
1555
1556 .no_alias = true,
1557 .no_instances = true,
1558 .no_isolate = true,
1559 .show_status = true,
1560
1561 .init = mount_init,
1562 .load = mount_load,
1563 .done = mount_done,
1564
1565 .coldplug = mount_coldplug,
1566
1567 .dump = mount_dump,
1568
1569 .start = mount_start,
1570 .stop = mount_stop,
1571 .reload = mount_reload,
1572
1573 .serialize = mount_serialize,
1574 .deserialize_item = mount_deserialize_item,
1575
1576 .active_state = mount_active_state,
1577 .sub_state_to_string = mount_sub_state_to_string,
1578
1579 .check_gc = mount_check_gc,
1580
1581 .sigchld_event = mount_sigchld_event,
1582 .timer_event = mount_timer_event,
1583
1584 .bus_message_handler = bus_mount_message_handler,
1585
1586 .enumerate = mount_enumerate,
1587 .shutdown = mount_shutdown
1588 };
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