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