chiark / gitweb /
systemctl: introduce reset-maintenance command
[elogind.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_add_default_dependencies(Mount *m) {
278         int r;
279
280         assert(m);
281
282         if (m->meta.manager->running_as == MANAGER_SYSTEM) {
283
284                 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
285                         return r;
286
287                 if (!path_equal(m->where, "/"))
288                         if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
289                                 return r;
290         }
291
292         return 0;
293 }
294
295 static int mount_verify(Mount *m) {
296         bool b;
297         char *e;
298         assert(m);
299
300         if (m->meta.load_state != UNIT_LOADED)
301                 return 0;
302
303         if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
304                 return -ENOENT;
305
306         if (!(e = unit_name_from_path(m->where, ".mount")))
307                 return -ENOMEM;
308
309         b = unit_has_name(UNIT(m), e);
310         free(e);
311
312         if (!b) {
313                 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
314                 return -EINVAL;
315         }
316
317         if (m->meta.fragment_path && !m->parameters_fragment.what) {
318                 log_error("%s's What setting is missing. Refusing.", m->meta.id);
319                 return -EBADMSG;
320         }
321
322         if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
323                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
324                 return -EINVAL;
325         }
326
327         return 0;
328 }
329
330 static int mount_load(Unit *u) {
331         Mount *m = MOUNT(u);
332         int r;
333
334         assert(u);
335         assert(u->meta.load_state == UNIT_STUB);
336
337         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
338                 return r;
339
340         /* This is a new unit? Then let's add in some extras */
341         if (u->meta.load_state == UNIT_LOADED) {
342                 const char *what = NULL;
343
344                 if (m->meta.fragment_path)
345                         m->from_fragment = true;
346
347                 if (!m->where)
348                         if (!(m->where = unit_name_to_path(u->meta.id)))
349                                 return -ENOMEM;
350
351                 path_kill_slashes(m->where);
352
353                 if (!m->meta.description)
354                         if ((r = unit_set_description(u, m->where)) < 0)
355                                 return r;
356
357                 if (m->from_fragment && m->parameters_fragment.what)
358                         what = m->parameters_fragment.what;
359                 else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
360                         what = m->parameters_etc_fstab.what;
361                 else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
362                         what = m->parameters_proc_self_mountinfo.what;
363
364                 if (what)
365                         if ((r = unit_add_node_link(u, what, u->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
366                                 return r;
367
368                 if ((r = mount_add_mount_links(m)) < 0)
369                         return r;
370
371                 if ((r = mount_add_socket_links(m)) < 0)
372                         return r;
373
374                 if ((r = mount_add_swap_links(m)) < 0)
375                         return r;
376
377                 if ((r = mount_add_path_links(m)) < 0)
378                         return r;
379
380                 if ((r = mount_add_automount_links(m)) < 0)
381                         return r;
382
383                 if ((r = mount_add_target_links(m)) < 0)
384                         return r;
385
386                 if ((r = unit_add_default_cgroup(u)) < 0)
387                         return r;
388
389                 if (m->meta.default_dependencies)
390                         if ((r = mount_add_default_dependencies(m)) < 0)
391                                 return r;
392         }
393
394         return mount_verify(m);
395 }
396
397 static int mount_notify_automount(Mount *m, int status) {
398         Unit *p;
399         int r;
400
401         assert(m);
402
403         if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
404                 return r == -ENOENT ? 0 : r;
405
406         return automount_send_ready(AUTOMOUNT(p), status);
407 }
408
409 static void mount_set_state(Mount *m, MountState state) {
410         MountState old_state;
411         assert(m);
412
413         old_state = m->state;
414         m->state = state;
415
416         if (state != MOUNT_MOUNTING &&
417             state != MOUNT_MOUNTING_DONE &&
418             state != MOUNT_REMOUNTING &&
419             state != MOUNT_UNMOUNTING &&
420             state != MOUNT_MOUNTING_SIGTERM &&
421             state != MOUNT_MOUNTING_SIGKILL &&
422             state != MOUNT_UNMOUNTING_SIGTERM &&
423             state != MOUNT_UNMOUNTING_SIGKILL &&
424             state != MOUNT_REMOUNTING_SIGTERM &&
425             state != MOUNT_REMOUNTING_SIGKILL) {
426                 unit_unwatch_timer(UNIT(m), &m->timer_watch);
427                 mount_unwatch_control_pid(m);
428                 m->control_command = NULL;
429                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
430         }
431
432         if (state == MOUNT_MOUNTED ||
433             state == MOUNT_REMOUNTING)
434                 mount_notify_automount(m, 0);
435         else if (state == MOUNT_DEAD ||
436                  state == MOUNT_UNMOUNTING ||
437                  state == MOUNT_MOUNTING_SIGTERM ||
438                  state == MOUNT_MOUNTING_SIGKILL ||
439                  state == MOUNT_REMOUNTING_SIGTERM ||
440                  state == MOUNT_REMOUNTING_SIGKILL ||
441                  state == MOUNT_UNMOUNTING_SIGTERM ||
442                  state == MOUNT_UNMOUNTING_SIGKILL ||
443                  state == MOUNT_MAINTENANCE)
444                 mount_notify_automount(m, -ENODEV);
445
446         if (state != old_state)
447                 log_debug("%s changed %s -> %s",
448                           m->meta.id,
449                           mount_state_to_string(old_state),
450                           mount_state_to_string(state));
451
452         unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
453 }
454
455 static int mount_coldplug(Unit *u) {
456         Mount *m = MOUNT(u);
457         MountState new_state = MOUNT_DEAD;
458         int r;
459
460         assert(m);
461         assert(m->state == MOUNT_DEAD);
462
463         if (m->deserialized_state != m->state)
464                 new_state = m->deserialized_state;
465         else if (m->from_proc_self_mountinfo)
466                 new_state = MOUNT_MOUNTED;
467
468         if (new_state != m->state) {
469
470                 if (new_state == MOUNT_MOUNTING ||
471                     new_state == MOUNT_MOUNTING_DONE ||
472                     new_state == MOUNT_REMOUNTING ||
473                     new_state == MOUNT_UNMOUNTING ||
474                     new_state == MOUNT_MOUNTING_SIGTERM ||
475                     new_state == MOUNT_MOUNTING_SIGKILL ||
476                     new_state == MOUNT_UNMOUNTING_SIGTERM ||
477                     new_state == MOUNT_UNMOUNTING_SIGKILL ||
478                     new_state == MOUNT_REMOUNTING_SIGTERM ||
479                     new_state == MOUNT_REMOUNTING_SIGKILL) {
480
481                         if (m->control_pid <= 0)
482                                 return -EBADMSG;
483
484                         if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
485                                 return r;
486
487                         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
488                                 return r;
489                 }
490
491                 mount_set_state(m, new_state);
492         }
493
494         return 0;
495 }
496
497 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
498         Mount *m = MOUNT(u);
499         MountParameters *p;
500
501         assert(m);
502         assert(f);
503
504         if (m->from_proc_self_mountinfo)
505                 p = &m->parameters_proc_self_mountinfo;
506         else if (m->from_fragment)
507                 p = &m->parameters_fragment;
508         else
509                 p = &m->parameters_etc_fstab;
510
511         fprintf(f,
512                 "%sMount State: %s\n"
513                 "%sWhere: %s\n"
514                 "%sWhat: %s\n"
515                 "%sFile System Type: %s\n"
516                 "%sOptions: %s\n"
517                 "%sFrom /etc/fstab: %s\n"
518                 "%sFrom /proc/self/mountinfo: %s\n"
519                 "%sFrom fragment: %s\n"
520                 "%sDirectoryMode: %04o\n",
521                 prefix, mount_state_to_string(m->state),
522                 prefix, m->where,
523                 prefix, strna(p->what),
524                 prefix, strna(p->fstype),
525                 prefix, strna(p->options),
526                 prefix, yes_no(m->from_etc_fstab),
527                 prefix, yes_no(m->from_proc_self_mountinfo),
528                 prefix, yes_no(m->from_fragment),
529                 prefix, m->directory_mode);
530
531         if (m->control_pid > 0)
532                 fprintf(f,
533                         "%sControl PID: %lu\n",
534                         prefix, (unsigned long) m->control_pid);
535
536         exec_context_dump(&m->exec_context, f, prefix);
537 }
538
539 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
540         pid_t pid;
541         int r;
542
543         assert(m);
544         assert(c);
545         assert(_pid);
546
547         if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
548                 goto fail;
549
550         if ((r = exec_spawn(c,
551                             NULL,
552                             &m->exec_context,
553                             NULL, 0,
554                             m->meta.manager->environment,
555                             true,
556                             true,
557                             true,
558                             m->meta.manager->confirm_spawn,
559                             m->meta.cgroup_bondings,
560                             &pid)) < 0)
561                 goto fail;
562
563         if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
564                 /* FIXME: we need to do something here */
565                 goto fail;
566
567         *_pid = pid;
568
569         return 0;
570
571 fail:
572         unit_unwatch_timer(UNIT(m), &m->timer_watch);
573
574         return r;
575 }
576
577 static void mount_enter_dead(Mount *m, bool success) {
578         assert(m);
579
580         if (!success)
581                 m->failure = true;
582
583         mount_set_state(m, m->failure ? MOUNT_MAINTENANCE : MOUNT_DEAD);
584 }
585
586 static void mount_enter_mounted(Mount *m, bool success) {
587         assert(m);
588
589         if (!success)
590                 m->failure = true;
591
592         mount_set_state(m, MOUNT_MOUNTED);
593 }
594
595 static void mount_enter_signal(Mount *m, MountState state, bool success) {
596         int r;
597         bool sent = false;
598
599         assert(m);
600
601         if (!success)
602                 m->failure = true;
603
604         if (m->exec_context.kill_mode != KILL_NONE) {
605                 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
606                            state == MOUNT_UNMOUNTING_SIGTERM ||
607                            state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
608
609                 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
610
611                         if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig)) < 0) {
612                                 if (r != -EAGAIN && r != -ESRCH)
613                                         goto fail;
614                         } else
615                                 sent = true;
616                 }
617
618                 if (!sent && m->control_pid > 0)
619                         if (kill(m->exec_context.kill_mode == KILL_PROCESS ?
620                                  m->control_pid :
621                                  -m->control_pid, sig) < 0 && errno != ESRCH) {
622
623                                 r = -errno;
624                                 goto fail;
625                         }
626         }
627
628         if (sent) {
629                 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
630                         goto fail;
631
632                 mount_set_state(m, state);
633         } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
634                 mount_enter_mounted(m, true);
635         else
636                 mount_enter_dead(m, true);
637
638         return;
639
640 fail:
641         log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
642
643         if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
644                 mount_enter_mounted(m, false);
645         else
646                 mount_enter_dead(m, false);
647 }
648
649 static void mount_enter_unmounting(Mount *m, bool success) {
650         int r;
651
652         assert(m);
653
654         if (!success)
655                 m->failure = true;
656
657         m->control_command_id = MOUNT_EXEC_UNMOUNT;
658         m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
659
660         if ((r = exec_command_set(
661                              m->control_command,
662                              "/bin/umount",
663                              m->where,
664                              NULL)) < 0)
665                 goto fail;
666
667         mount_unwatch_control_pid(m);
668
669         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
670                 goto fail;
671
672         mount_set_state(m, MOUNT_UNMOUNTING);
673
674         return;
675
676 fail:
677         log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
678         mount_enter_mounted(m, false);
679 }
680
681 static void mount_enter_mounting(Mount *m) {
682         int r;
683
684         assert(m);
685
686         m->control_command_id = MOUNT_EXEC_MOUNT;
687         m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
688
689         mkdir_p(m->where, m->directory_mode);
690
691         if (m->from_fragment)
692                 r = exec_command_set(
693                                 m->control_command,
694                                 "/bin/mount",
695                                 m->parameters_fragment.what,
696                                 m->where,
697                                 "-t", m->parameters_fragment.fstype,
698                                 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
699                                 NULL);
700         else if (m->from_etc_fstab)
701                 r = exec_command_set(
702                                 m->control_command,
703                                 "/bin/mount",
704                                 m->where,
705                                 NULL);
706         else
707                 r = -ENOENT;
708
709         if (r < 0)
710                 goto fail;
711
712         mount_unwatch_control_pid(m);
713
714         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
715                 goto fail;
716
717         mount_set_state(m, MOUNT_MOUNTING);
718
719         return;
720
721 fail:
722         log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
723         mount_enter_dead(m, false);
724 }
725
726 static void mount_enter_mounting_done(Mount *m) {
727         assert(m);
728
729         mount_set_state(m, MOUNT_MOUNTING_DONE);
730 }
731
732 static void mount_enter_remounting(Mount *m, bool success) {
733         int r;
734
735         assert(m);
736
737         if (!success)
738                 m->failure = true;
739
740         m->control_command_id = MOUNT_EXEC_REMOUNT;
741         m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
742
743         if (m->from_fragment) {
744                 char *buf = NULL;
745                 const char *o;
746
747                 if (m->parameters_fragment.options) {
748                         if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
749                                 r = -ENOMEM;
750                                 goto fail;
751                         }
752
753                         o = buf;
754                 } else
755                         o = "remount";
756
757                 r = exec_command_set(
758                                 m->control_command,
759                                 "/bin/mount",
760                                 m->parameters_fragment.what,
761                                 m->where,
762                                 "-t", m->parameters_fragment.fstype,
763                                 "-o", o,
764                                 NULL);
765
766                 free(buf);
767         } else if (m->from_etc_fstab)
768                 r = exec_command_set(
769                                 m->control_command,
770                                 "/bin/mount",
771                                 m->where,
772                                 "-o", "remount",
773                                 NULL);
774         else
775                 r = -ENOENT;
776
777         if (r < 0) {
778                 r = -ENOMEM;
779                 goto fail;
780         }
781
782         mount_unwatch_control_pid(m);
783
784         if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
785                 goto fail;
786
787         mount_set_state(m, MOUNT_REMOUNTING);
788
789         return;
790
791 fail:
792         mount_enter_mounted(m, false);
793 }
794
795 static int mount_start(Unit *u) {
796         Mount *m = MOUNT(u);
797
798         assert(m);
799
800         /* We cannot fulfill this request right now, try again later
801          * please! */
802         if (m->state == MOUNT_UNMOUNTING ||
803             m->state == MOUNT_UNMOUNTING_SIGTERM ||
804             m->state == MOUNT_UNMOUNTING_SIGKILL)
805                 return -EAGAIN;
806
807         /* Already on it! */
808         if (m->state == MOUNT_MOUNTING ||
809             m->state == MOUNT_MOUNTING_SIGTERM ||
810             m->state == MOUNT_MOUNTING_SIGKILL)
811                 return 0;
812
813         assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTENANCE);
814
815         m->failure = false;
816         mount_enter_mounting(m);
817         return 0;
818 }
819
820 static int mount_stop(Unit *u) {
821         Mount *m = MOUNT(u);
822
823         assert(m);
824
825         /* Already on it */
826         if (m->state == MOUNT_UNMOUNTING ||
827             m->state == MOUNT_UNMOUNTING_SIGKILL ||
828             m->state == MOUNT_UNMOUNTING_SIGTERM)
829                 return 0;
830
831         assert(m->state == MOUNT_MOUNTING ||
832                m->state == MOUNT_MOUNTING_DONE ||
833                m->state == MOUNT_MOUNTED ||
834                m->state == MOUNT_MOUNTING_SIGTERM ||
835                m->state == MOUNT_MOUNTING_SIGKILL ||
836                m->state == MOUNT_REMOUNTING ||
837                m->state == MOUNT_REMOUNTING_SIGTERM ||
838                m->state == MOUNT_REMOUNTING_SIGKILL);
839
840         mount_enter_unmounting(m, true);
841         return 0;
842 }
843
844 static int mount_reload(Unit *u) {
845         Mount *m = MOUNT(u);
846
847         assert(m);
848
849         if (m->state == MOUNT_MOUNTING_DONE)
850                 return -EAGAIN;
851
852         assert(m->state == MOUNT_MOUNTED);
853
854         mount_enter_remounting(m, true);
855         return 0;
856 }
857
858 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
859         Mount *m = MOUNT(u);
860
861         assert(m);
862         assert(f);
863         assert(fds);
864
865         unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
866         unit_serialize_item(u, f, "failure", yes_no(m->failure));
867
868         if (m->control_pid > 0)
869                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
870
871         if (m->control_command_id >= 0)
872                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
873
874         return 0;
875 }
876
877 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
878         Mount *m = MOUNT(u);
879         int r;
880
881         assert(u);
882         assert(key);
883         assert(value);
884         assert(fds);
885
886         if (streq(key, "state")) {
887                 MountState state;
888
889                 if ((state = mount_state_from_string(value)) < 0)
890                         log_debug("Failed to parse state value %s", value);
891                 else
892                         m->deserialized_state = state;
893         } else if (streq(key, "failure")) {
894                 int b;
895
896                 if ((b = parse_boolean(value)) < 0)
897                         log_debug("Failed to parse failure value %s", value);
898                 else
899                         m->failure = b || m->failure;
900
901         } else if (streq(key, "control-pid")) {
902                 pid_t pid;
903
904                 if ((r = parse_pid(value, &pid)) < 0)
905                         log_debug("Failed to parse control-pid value %s", value);
906                 else
907                         m->control_pid = pid;
908         } else if (streq(key, "control-command")) {
909                 MountExecCommand id;
910
911                 if ((id = mount_exec_command_from_string(value)) < 0)
912                         log_debug("Failed to parse exec-command value %s", value);
913                 else {
914                         m->control_command_id = id;
915                         m->control_command = m->exec_command + id;
916                 }
917
918         } else
919                 log_debug("Unknown serialization key '%s'", key);
920
921         return 0;
922 }
923
924 static UnitActiveState mount_active_state(Unit *u) {
925         assert(u);
926
927         return state_translation_table[MOUNT(u)->state];
928 }
929
930 static const char *mount_sub_state_to_string(Unit *u) {
931         assert(u);
932
933         return mount_state_to_string(MOUNT(u)->state);
934 }
935
936 static bool mount_check_gc(Unit *u) {
937         Mount *m = MOUNT(u);
938
939         assert(m);
940
941         return m->from_etc_fstab || m->from_proc_self_mountinfo;
942 }
943
944 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
945         Mount *m = MOUNT(u);
946         bool success;
947
948         assert(m);
949         assert(pid >= 0);
950
951         if (pid != m->control_pid)
952                 return;
953
954         m->control_pid = 0;
955
956         success = is_clean_exit(code, status);
957         m->failure = m->failure || !success;
958
959         if (m->control_command) {
960                 exec_status_exit(&m->control_command->exec_status, pid, code, status);
961                 m->control_command = NULL;
962                 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
963         }
964
965         log_full(success ? LOG_DEBUG : LOG_NOTICE,
966                  "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
967
968         /* Note that mount(8) returning and the kernel sending us a
969          * mount table change event might happen out-of-order. If an
970          * operation succeed we assume the kernel will follow soon too
971          * and already change into the resulting state.  If it fails
972          * we check if the kernel still knows about the mount. and
973          * change state accordingly. */
974
975         switch (m->state) {
976
977         case MOUNT_MOUNTING:
978         case MOUNT_MOUNTING_DONE:
979         case MOUNT_MOUNTING_SIGKILL:
980         case MOUNT_MOUNTING_SIGTERM:
981         case MOUNT_REMOUNTING:
982         case MOUNT_REMOUNTING_SIGKILL:
983         case MOUNT_REMOUNTING_SIGTERM:
984
985                 if (success)
986                         mount_enter_mounted(m, true);
987                 else if (m->from_proc_self_mountinfo)
988                         mount_enter_mounted(m, false);
989                 else
990                         mount_enter_dead(m, false);
991                 break;
992
993         case MOUNT_UNMOUNTING:
994         case MOUNT_UNMOUNTING_SIGKILL:
995         case MOUNT_UNMOUNTING_SIGTERM:
996
997                 if (success)
998                         mount_enter_dead(m, true);
999                 else if (m->from_proc_self_mountinfo)
1000                         mount_enter_mounted(m, false);
1001                 else
1002                         mount_enter_dead(m, false);
1003                 break;
1004
1005         default:
1006                 assert_not_reached("Uh, control process died at wrong time.");
1007         }
1008 }
1009
1010 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1011         Mount *m = MOUNT(u);
1012
1013         assert(m);
1014         assert(elapsed == 1);
1015         assert(w == &m->timer_watch);
1016
1017         switch (m->state) {
1018
1019         case MOUNT_MOUNTING:
1020         case MOUNT_MOUNTING_DONE:
1021                 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1022                 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1023                 break;
1024
1025         case MOUNT_REMOUNTING:
1026                 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1027                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1028                 break;
1029
1030         case MOUNT_UNMOUNTING:
1031                 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1032                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1033                 break;
1034
1035         case MOUNT_MOUNTING_SIGTERM:
1036                 log_warning("%s mounting timed out. Killing.", u->meta.id);
1037                 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1038                 break;
1039
1040         case MOUNT_REMOUNTING_SIGTERM:
1041                 log_warning("%s remounting timed out. Killing.", u->meta.id);
1042                 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1043                 break;
1044
1045         case MOUNT_UNMOUNTING_SIGTERM:
1046                 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1047                 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1048                 break;
1049
1050         case MOUNT_MOUNTING_SIGKILL:
1051         case MOUNT_REMOUNTING_SIGKILL:
1052         case MOUNT_UNMOUNTING_SIGKILL:
1053                 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1054
1055                 if (m->from_proc_self_mountinfo)
1056                         mount_enter_mounted(m, false);
1057                 else
1058                         mount_enter_dead(m, false);
1059                 break;
1060
1061         default:
1062                 assert_not_reached("Timeout at wrong time.");
1063         }
1064 }
1065
1066 static int mount_add_one(
1067                 Manager *m,
1068                 const char *what,
1069                 const char *where,
1070                 const char *options,
1071                 const char *fstype,
1072                 bool from_proc_self_mountinfo,
1073                 bool set_flags) {
1074         int r;
1075         Unit *u;
1076         bool delete;
1077         char *e, *w = NULL, *o = NULL, *f = NULL;
1078         MountParameters *p;
1079
1080         assert(m);
1081         assert(what);
1082         assert(where);
1083         assert(options);
1084         assert(fstype);
1085
1086         assert(!set_flags || from_proc_self_mountinfo);
1087
1088         /* Ignore API mount points. They should never be referenced in
1089          * dependencies ever. */
1090         if (mount_point_is_api(where))
1091                 return 0;
1092
1093         if (streq(fstype, "autofs"))
1094                 return 0;
1095
1096         /* probably some kind of swap, ignore */
1097         if (!is_path(where))
1098                 return 0;
1099
1100         if (!(e = unit_name_from_path(where, ".mount")))
1101                 return -ENOMEM;
1102
1103         if (!(u = manager_get_unit(m, e))) {
1104                 delete = true;
1105
1106                 if (!(u = unit_new(m))) {
1107                         free(e);
1108                         return -ENOMEM;
1109                 }
1110
1111                 r = unit_add_name(u, e);
1112                 free(e);
1113
1114                 if (r < 0)
1115                         goto fail;
1116
1117                 if (!(MOUNT(u)->where = strdup(where))) {
1118                         r = -ENOMEM;
1119                         goto fail;
1120                 }
1121
1122                 unit_add_to_load_queue(u);
1123         } else {
1124                 delete = false;
1125                 free(e);
1126         }
1127
1128         if (!(w = strdup(what)) ||
1129             !(o = strdup(options)) ||
1130             !(f = strdup(fstype))) {
1131                 r = -ENOMEM;
1132                 goto fail;
1133         }
1134
1135         if (from_proc_self_mountinfo) {
1136                 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1137
1138                 if (set_flags) {
1139                         MOUNT(u)->is_mounted = true;
1140                         MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1141                         MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1142                 }
1143
1144                 MOUNT(u)->from_proc_self_mountinfo = true;
1145         } else {
1146                 p = &MOUNT(u)->parameters_etc_fstab;
1147                 MOUNT(u)->from_etc_fstab = true;
1148         }
1149
1150         free(p->what);
1151         p->what = w;
1152
1153         free(p->options);
1154         p->options = o;
1155
1156         free(p->fstype);
1157         p->fstype = f;
1158
1159         unit_add_to_dbus_queue(u);
1160
1161         return 0;
1162
1163 fail:
1164         free(w);
1165         free(o);
1166         free(f);
1167
1168         if (delete && u)
1169                 unit_free(u);
1170
1171         return r;
1172 }
1173
1174 static char *fstab_node_to_udev_node(char *p) {
1175         char *dn, *t;
1176         int r;
1177
1178         /* FIXME: to follow udev's logic 100% we need to leave valid
1179          * UTF8 chars unescaped */
1180
1181         if (startswith(p, "LABEL=")) {
1182
1183                 if (!(t = xescape(p+6, "/ ")))
1184                         return NULL;
1185
1186                 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1187                 free(t);
1188
1189                 if (r < 0)
1190                         return NULL;
1191
1192                 return dn;
1193         }
1194
1195         if (startswith(p, "UUID=")) {
1196
1197                 if (!(t = xescape(p+5, "/ ")))
1198                         return NULL;
1199
1200                 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1201                 free(t);
1202
1203                 if (r < 0)
1204                         return NULL;
1205
1206                 return dn;
1207         }
1208
1209         return strdup(p);
1210 }
1211
1212 static int mount_find_pri(char *options) {
1213         char *end, *pri;
1214         unsigned long r;
1215
1216         if (!(pri = mount_test_option(options, "pri=")))
1217                 return 0;
1218
1219         pri += 4;
1220
1221         errno = 0;
1222         r = strtoul(pri, &end, 10);
1223
1224         if (errno != 0)
1225                 return -errno;
1226
1227         if (end == pri || (*end != ',' && *end != 0))
1228                 return -EINVAL;
1229
1230         return (int) r;
1231 }
1232
1233 static int mount_load_etc_fstab(Manager *m) {
1234         FILE *f;
1235         int r;
1236         struct mntent* me;
1237
1238         assert(m);
1239
1240         errno = 0;
1241         if (!(f = setmntent("/etc/fstab", "r")))
1242                 return -errno;
1243
1244         while ((me = getmntent(f))) {
1245                 char *where, *what;
1246
1247                 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1248                         r = -ENOMEM;
1249                         goto finish;
1250                 }
1251
1252                 if (!(where = strdup(me->mnt_dir))) {
1253                         free(what);
1254                         r = -ENOMEM;
1255                         goto finish;
1256                 }
1257
1258                 if (what[0] == '/')
1259                         path_kill_slashes(what);
1260
1261                 if (where[0] == '/')
1262                         path_kill_slashes(where);
1263
1264                 if (streq(me->mnt_type, "swap")) {
1265                         int pri;
1266
1267                         if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1268                                 r = pri;
1269                         else
1270                                 r = swap_add_one(m,
1271                                                  what,
1272                                                  pri,
1273                                                  !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1274                                                  !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1275                                                  false);
1276                 } else
1277                         r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1278
1279                 free(what);
1280                 free(where);
1281
1282                 if (r < 0)
1283                         goto finish;
1284         }
1285
1286         r = 0;
1287 finish:
1288
1289         endmntent(f);
1290         return r;
1291 }
1292
1293 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1294         int r;
1295         char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1296
1297         assert(m);
1298
1299         rewind(m->proc_self_mountinfo);
1300
1301         for (;;) {
1302                 int k;
1303
1304                 device = path = options = options2 = fstype = d = p = o = NULL;
1305
1306                 if ((k = fscanf(m->proc_self_mountinfo,
1307                                 "%*s "       /* (1) mount id */
1308                                 "%*s "       /* (2) parent id */
1309                                 "%*s "       /* (3) major:minor */
1310                                 "%*s "       /* (4) root */
1311                                 "%ms "       /* (5) mount point */
1312                                 "%ms"        /* (6) mount options */
1313                                 "%*[^-]"     /* (7) optional fields */
1314                                 "- "         /* (8) seperator */
1315                                 "%ms "       /* (9) file system type */
1316                                 "%ms"        /* (10) mount source */
1317                                 "%ms"        /* (11) mount options 2 */
1318                                 "%*[^\n]",   /* some rubbish at the end */
1319                                 &path,
1320                                 &options,
1321                                 &fstype,
1322                                 &device,
1323                                 &options2)) != 5) {
1324
1325                         if (k == EOF)
1326                                 break;
1327
1328                         r = -EBADMSG;
1329                         goto finish;
1330                 }
1331
1332                 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1333                         r = -ENOMEM;
1334                         goto finish;
1335                 }
1336
1337                 if (!(d = cunescape(device)) ||
1338                     !(p = cunescape(path))) {
1339                         r = -ENOMEM;
1340                         goto finish;
1341                 }
1342
1343                 if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1344                         goto finish;
1345
1346                 free(device);
1347                 free(path);
1348                 free(options);
1349                 free(options2);
1350                 free(fstype);
1351                 free(d);
1352                 free(p);
1353                 free(o);
1354         }
1355
1356         r = 0;
1357
1358 finish:
1359         free(device);
1360         free(path);
1361         free(options);
1362         free(options2);
1363         free(fstype);
1364         free(d);
1365         free(p);
1366         free(o);
1367
1368         return r;
1369 }
1370
1371 static void mount_shutdown(Manager *m) {
1372         assert(m);
1373
1374         if (m->proc_self_mountinfo) {
1375                 fclose(m->proc_self_mountinfo);
1376                 m->proc_self_mountinfo = NULL;
1377         }
1378 }
1379
1380 static int mount_enumerate(Manager *m) {
1381         int r;
1382         struct epoll_event ev;
1383         assert(m);
1384
1385         if (!m->proc_self_mountinfo) {
1386                 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1387                         return -errno;
1388
1389                 m->mount_watch.type = WATCH_MOUNT;
1390                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1391
1392                 zero(ev);
1393                 ev.events = EPOLLERR;
1394                 ev.data.ptr = &m->mount_watch;
1395
1396                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1397                         return -errno;
1398         }
1399
1400         if ((r = mount_load_etc_fstab(m)) < 0)
1401                 goto fail;
1402
1403         if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1404                 goto fail;
1405
1406         return 0;
1407
1408 fail:
1409         mount_shutdown(m);
1410         return r;
1411 }
1412
1413 void mount_fd_event(Manager *m, int events) {
1414         Meta *meta;
1415         int r;
1416
1417         assert(m);
1418         assert(events == EPOLLERR);
1419
1420         /* The manager calls this for every fd event happening on the
1421          * /proc/self/mountinfo file, which informs us about mounting
1422          * table changes */
1423
1424         if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1425                 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(errno));
1426
1427                 /* Reset flags, just in case, for later calls */
1428                 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1429                         Mount *mount = (Mount*) meta;
1430
1431                         mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1432                 }
1433
1434                 return;
1435         }
1436
1437         manager_dispatch_load_queue(m);
1438
1439         LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1440                 Mount *mount = (Mount*) meta;
1441
1442                 if (!mount->is_mounted) {
1443                         /* This has just been unmounted. */
1444
1445                         mount->from_proc_self_mountinfo = false;
1446
1447                         switch (mount->state) {
1448
1449                         case MOUNT_MOUNTED:
1450                                 mount_enter_dead(mount, true);
1451                                 break;
1452
1453                         default:
1454                                 mount_set_state(mount, mount->state);
1455                                 break;
1456
1457                         }
1458
1459                 } else if (mount->just_mounted || mount->just_changed) {
1460
1461                         /* New or changed entrymount */
1462
1463                         switch (mount->state) {
1464
1465                         case MOUNT_DEAD:
1466                         case MOUNT_MAINTENANCE:
1467                                 mount_enter_mounted(mount, true);
1468                                 break;
1469
1470                         case MOUNT_MOUNTING:
1471                                 mount_enter_mounting_done(mount);
1472                                 break;
1473
1474                         default:
1475                                 /* Nothing really changed, but let's
1476                                  * issue an notification call
1477                                  * nonetheless, in case somebody is
1478                                  * waiting for this. (e.g. file system
1479                                  * ro/rw remounts.) */
1480                                 mount_set_state(mount, mount->state);
1481                                 break;
1482                         }
1483                 }
1484
1485                 /* Reset the flags for later calls */
1486                 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1487         }
1488 }
1489
1490 int mount_path_is_mounted(Manager *m, const char* path) {
1491         char *t;
1492         int r;
1493
1494         assert(m);
1495         assert(path);
1496
1497         if (path[0] != '/')
1498                 return 1;
1499
1500         if (!(t = strdup(path)))
1501                 return -ENOMEM;
1502
1503         path_kill_slashes(t);
1504
1505         for (;;) {
1506                 char *e, *slash;
1507                 Unit *u;
1508
1509                 if (!(e = unit_name_from_path(t, ".mount"))) {
1510                         r = -ENOMEM;
1511                         goto finish;
1512                 }
1513
1514                 u = manager_get_unit(m, e);
1515                 free(e);
1516
1517                 if (u &&
1518                     (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1519                     MOUNT(u)->state != MOUNT_MOUNTED) {
1520                         r = 0;
1521                         goto finish;
1522                 }
1523
1524                 assert_se(slash = strrchr(t, '/'));
1525
1526                 if (slash == t) {
1527                         r = 1;
1528                         goto finish;
1529                 }
1530
1531                 *slash = 0;
1532         }
1533
1534         r = 1;
1535
1536 finish:
1537         free(t);
1538         return r;
1539 }
1540
1541 static void mount_reset_maintenance(Unit *u) {
1542         Mount *m = MOUNT(u);
1543
1544         assert(m);
1545
1546         if (m->state == MOUNT_MAINTENANCE)
1547                 mount_set_state(m, MOUNT_DEAD);
1548
1549         m->failure = false;
1550 }
1551
1552 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1553         [MOUNT_DEAD] = "dead",
1554         [MOUNT_MOUNTING] = "mounting",
1555         [MOUNT_MOUNTING_DONE] = "mounting-done",
1556         [MOUNT_MOUNTED] = "mounted",
1557         [MOUNT_REMOUNTING] = "remounting",
1558         [MOUNT_UNMOUNTING] = "unmounting",
1559         [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1560         [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1561         [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1562         [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1563         [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1564         [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1565         [MOUNT_MAINTENANCE] = "maintenance"
1566 };
1567
1568 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1569
1570 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1571         [MOUNT_EXEC_MOUNT] = "ExecMount",
1572         [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1573         [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1574 };
1575
1576 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1577
1578 const UnitVTable mount_vtable = {
1579         .suffix = ".mount",
1580
1581         .no_alias = true,
1582         .no_instances = true,
1583         .no_isolate = true,
1584         .show_status = true,
1585
1586         .init = mount_init,
1587         .load = mount_load,
1588         .done = mount_done,
1589
1590         .coldplug = mount_coldplug,
1591
1592         .dump = mount_dump,
1593
1594         .start = mount_start,
1595         .stop = mount_stop,
1596         .reload = mount_reload,
1597
1598         .serialize = mount_serialize,
1599         .deserialize_item = mount_deserialize_item,
1600
1601         .active_state = mount_active_state,
1602         .sub_state_to_string = mount_sub_state_to_string,
1603
1604         .check_gc = mount_check_gc,
1605
1606         .sigchld_event = mount_sigchld_event,
1607         .timer_event = mount_timer_event,
1608
1609         .reset_maintenance = mount_reset_maintenance,
1610
1611         .bus_message_handler = bus_mount_message_handler,
1612
1613         .enumerate = mount_enumerate,
1614         .shutdown = mount_shutdown
1615 };