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mount: properly handle bind mounts
[thirdparty/systemd.git] / src / mount.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3 /***
4 This file is part of systemd.
5
6 Copyright 2010 Lennart Poettering
7
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 ***/
21
22 #include <errno.h>
23 #include <stdio.h>
24 #include <mntent.h>
25 #include <sys/epoll.h>
26 #include <signal.h>
27
28 #include "unit.h"
29 #include "mount.h"
30 #include "load-fragment.h"
31 #include "load-dropin.h"
32 #include "log.h"
33 #include "strv.h"
34 #include "mount-setup.h"
35 #include "unit-name.h"
36 #include "dbus-mount.h"
37 #include "special.h"
38
39 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
40 [MOUNT_DEAD] = UNIT_INACTIVE,
41 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
42 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
43 [MOUNT_MOUNTED] = UNIT_ACTIVE,
44 [MOUNT_REMOUNTING] = UNIT_RELOADING,
45 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
46 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
47 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
48 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
49 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
50 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
51 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
52 [MOUNT_FAILED] = UNIT_FAILED
53 };
54
55 static void mount_init(Unit *u) {
56 Mount *m = MOUNT(u);
57
58 assert(u);
59 assert(u->meta.load_state == UNIT_STUB);
60
61 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
62 m->directory_mode = 0755;
63
64 exec_context_init(&m->exec_context);
65
66 /* We need to make sure that /bin/mount is always called in
67 * the same process group as us, so that the autofs kernel
68 * side doesn't send us another mount request while we are
69 * already trying to comply its last one. */
70 m->exec_context.same_pgrp = true;
71
72 m->timer_watch.type = WATCH_INVALID;
73
74 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
75 }
76
77 static void mount_unwatch_control_pid(Mount *m) {
78 assert(m);
79
80 if (m->control_pid <= 0)
81 return;
82
83 unit_unwatch_pid(UNIT(m), m->control_pid);
84 m->control_pid = 0;
85 }
86
87 static void mount_parameters_done(MountParameters *p) {
88 assert(p);
89
90 free(p->what);
91 free(p->options);
92 free(p->fstype);
93
94 p->what = p->options = p->fstype = NULL;
95 }
96
97 static void mount_done(Unit *u) {
98 Mount *m = MOUNT(u);
99
100 assert(m);
101
102 free(m->where);
103 m->where = NULL;
104
105 mount_parameters_done(&m->parameters_etc_fstab);
106 mount_parameters_done(&m->parameters_proc_self_mountinfo);
107 mount_parameters_done(&m->parameters_fragment);
108
109 exec_context_done(&m->exec_context);
110 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
111 m->control_command = NULL;
112
113 mount_unwatch_control_pid(m);
114
115 unit_unwatch_timer(u, &m->timer_watch);
116 }
117
118 static int mount_add_mount_links(Mount *m) {
119 Meta *other;
120 int r;
121 MountParameters *pm;
122
123 assert(m);
124
125 if (m->from_fragment)
126 pm = &m->parameters_fragment;
127 else if (m->from_etc_fstab)
128 pm = &m->parameters_etc_fstab;
129 else
130 pm = NULL;
131
132 /* Adds in links to other mount points that might lie below or
133 * above us in the hierarchy */
134
135 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
136 Mount *n = (Mount*) other;
137 MountParameters *pn;
138
139 if (n == m)
140 continue;
141
142 if (n->meta.load_state != UNIT_LOADED)
143 continue;
144
145 if (n->from_fragment)
146 pn = &n->parameters_fragment;
147 else if (n->from_etc_fstab)
148 pn = &n->parameters_etc_fstab;
149 else
150 pn = NULL;
151
152 if (path_startswith(m->where, n->where)) {
153
154 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
155 return r;
156
157 if (n->from_etc_fstab || n->from_fragment)
158 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
159 return r;
160
161 } else if (path_startswith(n->where, m->where)) {
162
163 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
164 return r;
165
166 if (m->from_etc_fstab || m->from_fragment)
167 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
168 return r;
169
170 } else if (pm && path_startswith(pm->what, n->where)) {
171
172 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
173 return r;
174
175 if (m->from_etc_fstab || m->from_fragment)
176 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
177 return r;
178
179 } else if (pn && path_startswith(pn->what, m->where)) {
180
181 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
182 return r;
183
184 if (n->from_etc_fstab || n->from_fragment)
185 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
186 return r;
187 }
188 }
189
190 return 0;
191 }
192
193 static int mount_add_swap_links(Mount *m) {
194 Meta *other;
195 int r;
196
197 assert(m);
198
199 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
200 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
201 return r;
202
203 return 0;
204 }
205
206 static int mount_add_path_links(Mount *m) {
207 Meta *other;
208 int r;
209
210 assert(m);
211
212 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
213 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
214 return r;
215
216 return 0;
217 }
218
219 static int mount_add_automount_links(Mount *m) {
220 Meta *other;
221 int r;
222
223 assert(m);
224
225 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
226 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
227 return r;
228
229 return 0;
230 }
231
232 static int mount_add_socket_links(Mount *m) {
233 Meta *other;
234 int r;
235
236 assert(m);
237
238 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
239 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
240 return r;
241
242 return 0;
243 }
244
245 static char* mount_test_option(const char *haystack, const char *needle) {
246 struct mntent me;
247
248 assert(needle);
249
250 /* Like glibc's hasmntopt(), but works on a string, not a
251 * struct mntent */
252
253 if (!haystack)
254 return false;
255
256 zero(me);
257 me.mnt_opts = (char*) haystack;
258
259 return hasmntopt(&me, needle);
260 }
261
262 static int mount_add_target_links(Mount *m) {
263 const char *target;
264 MountParameters *p;
265 Unit *tu;
266 int r;
267 bool noauto, handle, automount, user;
268
269 assert(m);
270
271 if (m->from_fragment)
272 p = &m->parameters_fragment;
273 else if (m->from_etc_fstab)
274 p = &m->parameters_etc_fstab;
275 else
276 return 0;
277
278 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
279 user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users");
280 handle = !!mount_test_option(p->options, "comment=systemd.mount") ||
281 m->meta.manager->mount_auto;
282 automount = !!mount_test_option(p->options, "comment=systemd.automount");
283
284 if (mount_test_option(p->options, "_netdev") ||
285 fstype_is_network(p->fstype))
286 target = SPECIAL_REMOTE_FS_TARGET;
287 else
288 target = SPECIAL_LOCAL_FS_TARGET;
289
290 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
291 return r;
292
293 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
294 Unit *am;
295
296 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
297 return r;
298
299 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
300 } else {
301
302 /* Automatically add mount points that aren't natively
303 * configured to local-fs.target */
304 if (!noauto &&
305 handle &&
306 !m->from_fragment)
307 if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
308 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
309 return r;
310
311 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
312 }
313 }
314
315 static bool mount_is_bind(MountParameters *p) {
316 assert(p);
317
318 if (p->fstype && streq(p->fstype, "bind"))
319 return true;
320
321 if (mount_test_option(p->options, "bind"))
322 return true;
323
324 return false;
325 }
326
327 static int mount_add_device_links(Mount *m) {
328 MountParameters *p;
329 bool nofail, noauto;
330
331 assert(m);
332
333 if (m->from_fragment)
334 p = &m->parameters_fragment;
335 else if (m->from_etc_fstab)
336 p = &m->parameters_etc_fstab;
337 else
338 return 0;
339
340 if (!p->what || path_equal(m->where, "/"))
341 return 0;
342
343 if (mount_is_bind(p))
344 return 0;
345
346 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
347 nofail = !!mount_test_option(p->options, "nofail");
348
349 return unit_add_node_link(UNIT(m), p->what,
350 !noauto && nofail &&
351 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM);
352 }
353
354 static int mount_add_default_dependencies(Mount *m) {
355 int r;
356
357 assert(m);
358
359 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
360 !path_equal(m->where, "/")) {
361
362 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_FSCK_TARGET, NULL, true)) < 0)
363 return r;
364
365 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
366 return r;
367 }
368
369 return 0;
370 }
371
372 static int mount_verify(Mount *m) {
373 bool b;
374 char *e;
375 assert(m);
376
377 if (m->meta.load_state != UNIT_LOADED)
378 return 0;
379
380 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
381 return -ENOENT;
382
383 if (!(e = unit_name_from_path(m->where, ".mount")))
384 return -ENOMEM;
385
386 b = unit_has_name(UNIT(m), e);
387 free(e);
388
389 if (!b) {
390 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
391 return -EINVAL;
392 }
393
394 if (m->meta.fragment_path && !m->parameters_fragment.what) {
395 log_error("%s's What setting is missing. Refusing.", m->meta.id);
396 return -EBADMSG;
397 }
398
399 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
400 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
401 return -EINVAL;
402 }
403
404 return 0;
405 }
406
407 static int mount_load(Unit *u) {
408 Mount *m = MOUNT(u);
409 int r;
410
411 assert(u);
412 assert(u->meta.load_state == UNIT_STUB);
413
414 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
415 return r;
416
417 /* This is a new unit? Then let's add in some extras */
418 if (u->meta.load_state == UNIT_LOADED) {
419 const char *what = NULL;
420
421 if (m->meta.fragment_path)
422 m->from_fragment = true;
423
424 if (!m->where)
425 if (!(m->where = unit_name_to_path(u->meta.id)))
426 return -ENOMEM;
427
428 path_kill_slashes(m->where);
429
430 if (!m->meta.description)
431 if ((r = unit_set_description(u, m->where)) < 0)
432 return r;
433
434 if (m->from_fragment && m->parameters_fragment.what)
435 what = m->parameters_fragment.what;
436 else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
437 what = m->parameters_etc_fstab.what;
438 else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
439 what = m->parameters_proc_self_mountinfo.what;
440
441 if ((r = mount_add_device_links(m)) < 0)
442 return r;
443
444 if ((r = mount_add_mount_links(m)) < 0)
445 return r;
446
447 if ((r = mount_add_socket_links(m)) < 0)
448 return r;
449
450 if ((r = mount_add_swap_links(m)) < 0)
451 return r;
452
453 if ((r = mount_add_path_links(m)) < 0)
454 return r;
455
456 if ((r = mount_add_automount_links(m)) < 0)
457 return r;
458
459 if ((r = mount_add_target_links(m)) < 0)
460 return r;
461
462 if ((r = unit_add_default_cgroup(u)) < 0)
463 return r;
464
465 if (m->meta.default_dependencies)
466 if ((r = mount_add_default_dependencies(m)) < 0)
467 return r;
468 }
469
470 return mount_verify(m);
471 }
472
473 static int mount_notify_automount(Mount *m, int status) {
474 Unit *p;
475 int r;
476
477 assert(m);
478
479 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
480 return r == -ENOENT ? 0 : r;
481
482 return automount_send_ready(AUTOMOUNT(p), status);
483 }
484
485 static void mount_set_state(Mount *m, MountState state) {
486 MountState old_state;
487 assert(m);
488
489 old_state = m->state;
490 m->state = state;
491
492 if (state != MOUNT_MOUNTING &&
493 state != MOUNT_MOUNTING_DONE &&
494 state != MOUNT_REMOUNTING &&
495 state != MOUNT_UNMOUNTING &&
496 state != MOUNT_MOUNTING_SIGTERM &&
497 state != MOUNT_MOUNTING_SIGKILL &&
498 state != MOUNT_UNMOUNTING_SIGTERM &&
499 state != MOUNT_UNMOUNTING_SIGKILL &&
500 state != MOUNT_REMOUNTING_SIGTERM &&
501 state != MOUNT_REMOUNTING_SIGKILL) {
502 unit_unwatch_timer(UNIT(m), &m->timer_watch);
503 mount_unwatch_control_pid(m);
504 m->control_command = NULL;
505 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
506 }
507
508 if (state == MOUNT_MOUNTED ||
509 state == MOUNT_REMOUNTING)
510 mount_notify_automount(m, 0);
511 else if (state == MOUNT_DEAD ||
512 state == MOUNT_UNMOUNTING ||
513 state == MOUNT_MOUNTING_SIGTERM ||
514 state == MOUNT_MOUNTING_SIGKILL ||
515 state == MOUNT_REMOUNTING_SIGTERM ||
516 state == MOUNT_REMOUNTING_SIGKILL ||
517 state == MOUNT_UNMOUNTING_SIGTERM ||
518 state == MOUNT_UNMOUNTING_SIGKILL ||
519 state == MOUNT_FAILED)
520 mount_notify_automount(m, -ENODEV);
521
522 if (state != old_state)
523 log_debug("%s changed %s -> %s",
524 m->meta.id,
525 mount_state_to_string(old_state),
526 mount_state_to_string(state));
527
528 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
529 }
530
531 static int mount_coldplug(Unit *u) {
532 Mount *m = MOUNT(u);
533 MountState new_state = MOUNT_DEAD;
534 int r;
535
536 assert(m);
537 assert(m->state == MOUNT_DEAD);
538
539 if (m->deserialized_state != m->state)
540 new_state = m->deserialized_state;
541 else if (m->from_proc_self_mountinfo)
542 new_state = MOUNT_MOUNTED;
543
544 if (new_state != m->state) {
545
546 if (new_state == MOUNT_MOUNTING ||
547 new_state == MOUNT_MOUNTING_DONE ||
548 new_state == MOUNT_REMOUNTING ||
549 new_state == MOUNT_UNMOUNTING ||
550 new_state == MOUNT_MOUNTING_SIGTERM ||
551 new_state == MOUNT_MOUNTING_SIGKILL ||
552 new_state == MOUNT_UNMOUNTING_SIGTERM ||
553 new_state == MOUNT_UNMOUNTING_SIGKILL ||
554 new_state == MOUNT_REMOUNTING_SIGTERM ||
555 new_state == MOUNT_REMOUNTING_SIGKILL) {
556
557 if (m->control_pid <= 0)
558 return -EBADMSG;
559
560 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
561 return r;
562
563 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
564 return r;
565 }
566
567 mount_set_state(m, new_state);
568 }
569
570 return 0;
571 }
572
573 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
574 Mount *m = MOUNT(u);
575 MountParameters *p;
576
577 assert(m);
578 assert(f);
579
580 if (m->from_proc_self_mountinfo)
581 p = &m->parameters_proc_self_mountinfo;
582 else if (m->from_fragment)
583 p = &m->parameters_fragment;
584 else
585 p = &m->parameters_etc_fstab;
586
587 fprintf(f,
588 "%sMount State: %s\n"
589 "%sWhere: %s\n"
590 "%sWhat: %s\n"
591 "%sFile System Type: %s\n"
592 "%sOptions: %s\n"
593 "%sFrom /etc/fstab: %s\n"
594 "%sFrom /proc/self/mountinfo: %s\n"
595 "%sFrom fragment: %s\n"
596 "%sDirectoryMode: %04o\n",
597 prefix, mount_state_to_string(m->state),
598 prefix, m->where,
599 prefix, strna(p->what),
600 prefix, strna(p->fstype),
601 prefix, strna(p->options),
602 prefix, yes_no(m->from_etc_fstab),
603 prefix, yes_no(m->from_proc_self_mountinfo),
604 prefix, yes_no(m->from_fragment),
605 prefix, m->directory_mode);
606
607 if (m->control_pid > 0)
608 fprintf(f,
609 "%sControl PID: %lu\n",
610 prefix, (unsigned long) m->control_pid);
611
612 exec_context_dump(&m->exec_context, f, prefix);
613 }
614
615 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
616 pid_t pid;
617 int r;
618
619 assert(m);
620 assert(c);
621 assert(_pid);
622
623 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
624 goto fail;
625
626 if ((r = exec_spawn(c,
627 NULL,
628 &m->exec_context,
629 NULL, 0,
630 m->meta.manager->environment,
631 true,
632 true,
633 true,
634 m->meta.manager->confirm_spawn,
635 m->meta.cgroup_bondings,
636 &pid)) < 0)
637 goto fail;
638
639 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
640 /* FIXME: we need to do something here */
641 goto fail;
642
643 *_pid = pid;
644
645 return 0;
646
647 fail:
648 unit_unwatch_timer(UNIT(m), &m->timer_watch);
649
650 return r;
651 }
652
653 static void mount_enter_dead(Mount *m, bool success) {
654 assert(m);
655
656 if (!success)
657 m->failure = true;
658
659 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
660 }
661
662 static void mount_enter_mounted(Mount *m, bool success) {
663 assert(m);
664
665 if (!success)
666 m->failure = true;
667
668 mount_set_state(m, MOUNT_MOUNTED);
669 }
670
671 static void mount_enter_signal(Mount *m, MountState state, bool success) {
672 int r;
673 Set *pid_set = NULL;
674 bool wait_for_exit = false;
675
676 assert(m);
677
678 if (!success)
679 m->failure = true;
680
681 if (m->exec_context.kill_mode != KILL_NONE) {
682 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
683 state == MOUNT_UNMOUNTING_SIGTERM ||
684 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
685
686 if (m->control_pid > 0) {
687 if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
688 -m->control_pid :
689 m->control_pid, sig) < 0 && errno != ESRCH)
690
691 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
692 else
693 wait_for_exit = true;
694 }
695
696 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
697
698 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
699 r = -ENOMEM;
700 goto fail;
701 }
702
703 /* Exclude the control pid from being killed via the cgroup */
704 if (m->control_pid > 0)
705 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
706 goto fail;
707
708 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
709 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
710 log_warning("Failed to kill control group: %s", strerror(-r));
711 } else if (r > 0)
712 wait_for_exit = true;
713
714 set_free(pid_set);
715 }
716 }
717
718 if (wait_for_exit) {
719 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
720 goto fail;
721
722 mount_set_state(m, state);
723 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
724 mount_enter_mounted(m, true);
725 else
726 mount_enter_dead(m, true);
727
728 return;
729
730 fail:
731 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
732
733 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
734 mount_enter_mounted(m, false);
735 else
736 mount_enter_dead(m, false);
737
738 if (pid_set)
739 set_free(pid_set);
740 }
741
742 static void mount_enter_unmounting(Mount *m, bool success) {
743 int r;
744
745 assert(m);
746
747 if (!success)
748 m->failure = true;
749
750 m->control_command_id = MOUNT_EXEC_UNMOUNT;
751 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
752
753 if ((r = exec_command_set(
754 m->control_command,
755 "/bin/umount",
756 m->where,
757 NULL)) < 0)
758 goto fail;
759
760 mount_unwatch_control_pid(m);
761
762 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
763 goto fail;
764
765 mount_set_state(m, MOUNT_UNMOUNTING);
766
767 return;
768
769 fail:
770 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
771 mount_enter_mounted(m, false);
772 }
773
774 static void mount_enter_mounting(Mount *m) {
775 int r;
776
777 assert(m);
778
779 m->control_command_id = MOUNT_EXEC_MOUNT;
780 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
781
782 mkdir_p(m->where, m->directory_mode);
783
784 if (m->from_fragment)
785 r = exec_command_set(
786 m->control_command,
787 "/bin/mount",
788 m->parameters_fragment.what,
789 m->where,
790 "-t", m->parameters_fragment.fstype,
791 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
792 NULL);
793 else if (m->from_etc_fstab)
794 r = exec_command_set(
795 m->control_command,
796 "/bin/mount",
797 m->where,
798 NULL);
799 else
800 r = -ENOENT;
801
802 if (r < 0)
803 goto fail;
804
805 mount_unwatch_control_pid(m);
806
807 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
808 goto fail;
809
810 mount_set_state(m, MOUNT_MOUNTING);
811
812 return;
813
814 fail:
815 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
816 mount_enter_dead(m, false);
817 }
818
819 static void mount_enter_mounting_done(Mount *m) {
820 assert(m);
821
822 mount_set_state(m, MOUNT_MOUNTING_DONE);
823 }
824
825 static void mount_enter_remounting(Mount *m, bool success) {
826 int r;
827
828 assert(m);
829
830 if (!success)
831 m->failure = true;
832
833 m->control_command_id = MOUNT_EXEC_REMOUNT;
834 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
835
836 if (m->from_fragment) {
837 char *buf = NULL;
838 const char *o;
839
840 if (m->parameters_fragment.options) {
841 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
842 r = -ENOMEM;
843 goto fail;
844 }
845
846 o = buf;
847 } else
848 o = "remount";
849
850 r = exec_command_set(
851 m->control_command,
852 "/bin/mount",
853 m->parameters_fragment.what,
854 m->where,
855 "-t", m->parameters_fragment.fstype,
856 "-o", o,
857 NULL);
858
859 free(buf);
860 } else if (m->from_etc_fstab)
861 r = exec_command_set(
862 m->control_command,
863 "/bin/mount",
864 m->where,
865 "-o", "remount",
866 NULL);
867 else
868 r = -ENOENT;
869
870 if (r < 0) {
871 r = -ENOMEM;
872 goto fail;
873 }
874
875 mount_unwatch_control_pid(m);
876
877 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
878 goto fail;
879
880 mount_set_state(m, MOUNT_REMOUNTING);
881
882 return;
883
884 fail:
885 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
886 mount_enter_mounted(m, false);
887 }
888
889 static int mount_start(Unit *u) {
890 Mount *m = MOUNT(u);
891
892 assert(m);
893
894 /* We cannot fulfill this request right now, try again later
895 * please! */
896 if (m->state == MOUNT_UNMOUNTING ||
897 m->state == MOUNT_UNMOUNTING_SIGTERM ||
898 m->state == MOUNT_UNMOUNTING_SIGKILL)
899 return -EAGAIN;
900
901 /* Already on it! */
902 if (m->state == MOUNT_MOUNTING ||
903 m->state == MOUNT_MOUNTING_SIGTERM ||
904 m->state == MOUNT_MOUNTING_SIGKILL)
905 return 0;
906
907 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
908
909 m->failure = false;
910 mount_enter_mounting(m);
911 return 0;
912 }
913
914 static int mount_stop(Unit *u) {
915 Mount *m = MOUNT(u);
916
917 assert(m);
918
919 /* Already on it */
920 if (m->state == MOUNT_UNMOUNTING ||
921 m->state == MOUNT_UNMOUNTING_SIGKILL ||
922 m->state == MOUNT_UNMOUNTING_SIGTERM)
923 return 0;
924
925 assert(m->state == MOUNT_MOUNTING ||
926 m->state == MOUNT_MOUNTING_DONE ||
927 m->state == MOUNT_MOUNTED ||
928 m->state == MOUNT_MOUNTING_SIGTERM ||
929 m->state == MOUNT_MOUNTING_SIGKILL ||
930 m->state == MOUNT_REMOUNTING ||
931 m->state == MOUNT_REMOUNTING_SIGTERM ||
932 m->state == MOUNT_REMOUNTING_SIGKILL);
933
934 mount_enter_unmounting(m, true);
935 return 0;
936 }
937
938 static int mount_reload(Unit *u) {
939 Mount *m = MOUNT(u);
940
941 assert(m);
942
943 if (m->state == MOUNT_MOUNTING_DONE)
944 return -EAGAIN;
945
946 assert(m->state == MOUNT_MOUNTED);
947
948 mount_enter_remounting(m, true);
949 return 0;
950 }
951
952 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
953 Mount *m = MOUNT(u);
954
955 assert(m);
956 assert(f);
957 assert(fds);
958
959 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
960 unit_serialize_item(u, f, "failure", yes_no(m->failure));
961
962 if (m->control_pid > 0)
963 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
964
965 if (m->control_command_id >= 0)
966 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
967
968 return 0;
969 }
970
971 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
972 Mount *m = MOUNT(u);
973
974 assert(u);
975 assert(key);
976 assert(value);
977 assert(fds);
978
979 if (streq(key, "state")) {
980 MountState state;
981
982 if ((state = mount_state_from_string(value)) < 0)
983 log_debug("Failed to parse state value %s", value);
984 else
985 m->deserialized_state = state;
986 } else if (streq(key, "failure")) {
987 int b;
988
989 if ((b = parse_boolean(value)) < 0)
990 log_debug("Failed to parse failure value %s", value);
991 else
992 m->failure = b || m->failure;
993
994 } else if (streq(key, "control-pid")) {
995 pid_t pid;
996
997 if (parse_pid(value, &pid) < 0)
998 log_debug("Failed to parse control-pid value %s", value);
999 else
1000 m->control_pid = pid;
1001 } else if (streq(key, "control-command")) {
1002 MountExecCommand id;
1003
1004 if ((id = mount_exec_command_from_string(value)) < 0)
1005 log_debug("Failed to parse exec-command value %s", value);
1006 else {
1007 m->control_command_id = id;
1008 m->control_command = m->exec_command + id;
1009 }
1010
1011 } else
1012 log_debug("Unknown serialization key '%s'", key);
1013
1014 return 0;
1015 }
1016
1017 static UnitActiveState mount_active_state(Unit *u) {
1018 assert(u);
1019
1020 return state_translation_table[MOUNT(u)->state];
1021 }
1022
1023 static const char *mount_sub_state_to_string(Unit *u) {
1024 assert(u);
1025
1026 return mount_state_to_string(MOUNT(u)->state);
1027 }
1028
1029 static bool mount_check_gc(Unit *u) {
1030 Mount *m = MOUNT(u);
1031
1032 assert(m);
1033
1034 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1035 }
1036
1037 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1038 Mount *m = MOUNT(u);
1039 bool success;
1040
1041 assert(m);
1042 assert(pid >= 0);
1043
1044 if (pid != m->control_pid)
1045 return;
1046
1047 m->control_pid = 0;
1048
1049 success = is_clean_exit(code, status);
1050 m->failure = m->failure || !success;
1051
1052 if (m->control_command) {
1053 exec_status_exit(&m->control_command->exec_status, pid, code, status);
1054 m->control_command = NULL;
1055 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1056 }
1057
1058 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1059 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1060
1061 /* Note that mount(8) returning and the kernel sending us a
1062 * mount table change event might happen out-of-order. If an
1063 * operation succeed we assume the kernel will follow soon too
1064 * and already change into the resulting state. If it fails
1065 * we check if the kernel still knows about the mount. and
1066 * change state accordingly. */
1067
1068 switch (m->state) {
1069
1070 case MOUNT_MOUNTING:
1071 case MOUNT_MOUNTING_DONE:
1072 case MOUNT_MOUNTING_SIGKILL:
1073 case MOUNT_MOUNTING_SIGTERM:
1074 case MOUNT_REMOUNTING:
1075 case MOUNT_REMOUNTING_SIGKILL:
1076 case MOUNT_REMOUNTING_SIGTERM:
1077
1078 if (success)
1079 mount_enter_mounted(m, true);
1080 else if (m->from_proc_self_mountinfo)
1081 mount_enter_mounted(m, false);
1082 else
1083 mount_enter_dead(m, false);
1084 break;
1085
1086 case MOUNT_UNMOUNTING:
1087 case MOUNT_UNMOUNTING_SIGKILL:
1088 case MOUNT_UNMOUNTING_SIGTERM:
1089
1090 if (success)
1091 mount_enter_dead(m, true);
1092 else if (m->from_proc_self_mountinfo)
1093 mount_enter_mounted(m, false);
1094 else
1095 mount_enter_dead(m, false);
1096 break;
1097
1098 default:
1099 assert_not_reached("Uh, control process died at wrong time.");
1100 }
1101
1102 /* Notify clients about changed exit status */
1103 unit_add_to_dbus_queue(u);
1104 }
1105
1106 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1107 Mount *m = MOUNT(u);
1108
1109 assert(m);
1110 assert(elapsed == 1);
1111 assert(w == &m->timer_watch);
1112
1113 switch (m->state) {
1114
1115 case MOUNT_MOUNTING:
1116 case MOUNT_MOUNTING_DONE:
1117 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1118 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1119 break;
1120
1121 case MOUNT_REMOUNTING:
1122 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1123 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1124 break;
1125
1126 case MOUNT_UNMOUNTING:
1127 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1128 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1129 break;
1130
1131 case MOUNT_MOUNTING_SIGTERM:
1132 log_warning("%s mounting timed out. Killing.", u->meta.id);
1133 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1134 break;
1135
1136 case MOUNT_REMOUNTING_SIGTERM:
1137 log_warning("%s remounting timed out. Killing.", u->meta.id);
1138 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1139 break;
1140
1141 case MOUNT_UNMOUNTING_SIGTERM:
1142 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1143 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1144 break;
1145
1146 case MOUNT_MOUNTING_SIGKILL:
1147 case MOUNT_REMOUNTING_SIGKILL:
1148 case MOUNT_UNMOUNTING_SIGKILL:
1149 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1150
1151 if (m->from_proc_self_mountinfo)
1152 mount_enter_mounted(m, false);
1153 else
1154 mount_enter_dead(m, false);
1155 break;
1156
1157 default:
1158 assert_not_reached("Timeout at wrong time.");
1159 }
1160 }
1161
1162 static int mount_add_one(
1163 Manager *m,
1164 const char *what,
1165 const char *where,
1166 const char *options,
1167 const char *fstype,
1168 bool from_proc_self_mountinfo,
1169 bool set_flags) {
1170 int r;
1171 Unit *u;
1172 bool delete;
1173 char *e, *w = NULL, *o = NULL, *f = NULL;
1174 MountParameters *p;
1175
1176 assert(m);
1177 assert(what);
1178 assert(where);
1179 assert(options);
1180 assert(fstype);
1181
1182 assert(!set_flags || from_proc_self_mountinfo);
1183
1184 /* Ignore API mount points. They should never be referenced in
1185 * dependencies ever. */
1186 if (mount_point_is_api(where))
1187 return 0;
1188
1189 if (streq(fstype, "autofs"))
1190 return 0;
1191
1192 /* probably some kind of swap, ignore */
1193 if (!is_path(where))
1194 return 0;
1195
1196 if (!(e = unit_name_from_path(where, ".mount")))
1197 return -ENOMEM;
1198
1199 if (!(u = manager_get_unit(m, e))) {
1200 delete = true;
1201
1202 if (!(u = unit_new(m))) {
1203 free(e);
1204 return -ENOMEM;
1205 }
1206
1207 r = unit_add_name(u, e);
1208 free(e);
1209
1210 if (r < 0)
1211 goto fail;
1212
1213 if (!(MOUNT(u)->where = strdup(where))) {
1214 r = -ENOMEM;
1215 goto fail;
1216 }
1217
1218 unit_add_to_load_queue(u);
1219 } else {
1220 delete = false;
1221 free(e);
1222 }
1223
1224 if (!(w = strdup(what)) ||
1225 !(o = strdup(options)) ||
1226 !(f = strdup(fstype))) {
1227 r = -ENOMEM;
1228 goto fail;
1229 }
1230
1231 if (from_proc_self_mountinfo) {
1232 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1233
1234 if (set_flags) {
1235 MOUNT(u)->is_mounted = true;
1236 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1237 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1238 }
1239
1240 MOUNT(u)->from_proc_self_mountinfo = true;
1241 } else {
1242 p = &MOUNT(u)->parameters_etc_fstab;
1243 MOUNT(u)->from_etc_fstab = true;
1244 }
1245
1246 free(p->what);
1247 p->what = w;
1248
1249 free(p->options);
1250 p->options = o;
1251
1252 free(p->fstype);
1253 p->fstype = f;
1254
1255 unit_add_to_dbus_queue(u);
1256
1257 return 0;
1258
1259 fail:
1260 free(w);
1261 free(o);
1262 free(f);
1263
1264 if (delete && u)
1265 unit_free(u);
1266
1267 return r;
1268 }
1269
1270 static char *fstab_node_to_udev_node(char *p) {
1271 char *dn, *t, *u;
1272 int r;
1273
1274 /* FIXME: to follow udev's logic 100% we need to leave valid
1275 * UTF8 chars unescaped */
1276
1277 if (startswith(p, "LABEL=")) {
1278
1279 if (!(u = unquote(p+6, "\"\'")))
1280 return NULL;
1281
1282 t = xescape(u, "/ ");
1283 free(u);
1284
1285 if (!t)
1286 return NULL;
1287
1288 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1289 free(t);
1290
1291 if (r < 0)
1292 return NULL;
1293
1294 return dn;
1295 }
1296
1297 if (startswith(p, "UUID=")) {
1298
1299 if (!(u = unquote(p+5, "\"\'")))
1300 return NULL;
1301
1302 t = xescape(u, "/ ");
1303 free(u);
1304
1305 if (!t)
1306 return NULL;
1307
1308 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1309 free(t);
1310
1311 if (r < 0)
1312 return NULL;
1313
1314 return dn;
1315 }
1316
1317 return strdup(p);
1318 }
1319
1320 static int mount_find_pri(char *options) {
1321 char *end, *pri;
1322 unsigned long r;
1323
1324 if (!(pri = mount_test_option(options, "pri=")))
1325 return 0;
1326
1327 pri += 4;
1328
1329 errno = 0;
1330 r = strtoul(pri, &end, 10);
1331
1332 if (errno != 0)
1333 return -errno;
1334
1335 if (end == pri || (*end != ',' && *end != 0))
1336 return -EINVAL;
1337
1338 return (int) r;
1339 }
1340
1341 static int mount_load_etc_fstab(Manager *m) {
1342 FILE *f;
1343 int r;
1344 struct mntent* me;
1345
1346 assert(m);
1347
1348 errno = 0;
1349 if (!(f = setmntent("/etc/fstab", "r")))
1350 return -errno;
1351
1352 while ((me = getmntent(f))) {
1353 char *where, *what;
1354
1355 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1356 r = -ENOMEM;
1357 goto finish;
1358 }
1359
1360 if (!(where = strdup(me->mnt_dir))) {
1361 free(what);
1362 r = -ENOMEM;
1363 goto finish;
1364 }
1365
1366 if (what[0] == '/')
1367 path_kill_slashes(what);
1368
1369 if (where[0] == '/')
1370 path_kill_slashes(where);
1371
1372 if (streq(me->mnt_type, "swap")) {
1373 int pri;
1374
1375 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1376 r = pri;
1377 else
1378 r = swap_add_one(m,
1379 what,
1380 pri,
1381 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1382 !!mount_test_option(me->mnt_opts, "nofail"),
1383 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1384 false);
1385 } else
1386 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1387
1388 free(what);
1389 free(where);
1390
1391 if (r < 0)
1392 goto finish;
1393 }
1394
1395 r = 0;
1396 finish:
1397
1398 endmntent(f);
1399 return r;
1400 }
1401
1402 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1403 int r;
1404 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1405
1406 assert(m);
1407
1408 rewind(m->proc_self_mountinfo);
1409
1410 for (;;) {
1411 int k;
1412
1413 device = path = options = options2 = fstype = d = p = o = NULL;
1414
1415 if ((k = fscanf(m->proc_self_mountinfo,
1416 "%*s " /* (1) mount id */
1417 "%*s " /* (2) parent id */
1418 "%*s " /* (3) major:minor */
1419 "%*s " /* (4) root */
1420 "%ms " /* (5) mount point */
1421 "%ms" /* (6) mount options */
1422 "%*[^-]" /* (7) optional fields */
1423 "- " /* (8) seperator */
1424 "%ms " /* (9) file system type */
1425 "%ms" /* (10) mount source */
1426 "%ms" /* (11) mount options 2 */
1427 "%*[^\n]", /* some rubbish at the end */
1428 &path,
1429 &options,
1430 &fstype,
1431 &device,
1432 &options2)) != 5) {
1433
1434 if (k == EOF)
1435 break;
1436
1437 r = -EBADMSG;
1438 goto finish;
1439 }
1440
1441 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1442 r = -ENOMEM;
1443 goto finish;
1444 }
1445
1446 if (!(d = cunescape(device)) ||
1447 !(p = cunescape(path))) {
1448 r = -ENOMEM;
1449 goto finish;
1450 }
1451
1452 if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1453 goto finish;
1454
1455 free(device);
1456 free(path);
1457 free(options);
1458 free(options2);
1459 free(fstype);
1460 free(d);
1461 free(p);
1462 free(o);
1463 }
1464
1465 r = 0;
1466
1467 finish:
1468 free(device);
1469 free(path);
1470 free(options);
1471 free(options2);
1472 free(fstype);
1473 free(d);
1474 free(p);
1475 free(o);
1476
1477 return r;
1478 }
1479
1480 static void mount_shutdown(Manager *m) {
1481 assert(m);
1482
1483 if (m->proc_self_mountinfo) {
1484 fclose(m->proc_self_mountinfo);
1485 m->proc_self_mountinfo = NULL;
1486 }
1487 }
1488
1489 static int mount_enumerate(Manager *m) {
1490 int r;
1491 struct epoll_event ev;
1492 assert(m);
1493
1494 if (!m->proc_self_mountinfo) {
1495 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1496 return -errno;
1497
1498 m->mount_watch.type = WATCH_MOUNT;
1499 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1500
1501 zero(ev);
1502 ev.events = EPOLLERR;
1503 ev.data.ptr = &m->mount_watch;
1504
1505 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1506 return -errno;
1507 }
1508
1509 if ((r = mount_load_etc_fstab(m)) < 0)
1510 goto fail;
1511
1512 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1513 goto fail;
1514
1515 return 0;
1516
1517 fail:
1518 mount_shutdown(m);
1519 return r;
1520 }
1521
1522 void mount_fd_event(Manager *m, int events) {
1523 Meta *meta;
1524 int r;
1525
1526 assert(m);
1527 assert(events == EPOLLERR);
1528
1529 /* The manager calls this for every fd event happening on the
1530 * /proc/self/mountinfo file, which informs us about mounting
1531 * table changes */
1532
1533 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1534 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1535
1536 /* Reset flags, just in case, for later calls */
1537 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1538 Mount *mount = (Mount*) meta;
1539
1540 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1541 }
1542
1543 return;
1544 }
1545
1546 manager_dispatch_load_queue(m);
1547
1548 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1549 Mount *mount = (Mount*) meta;
1550
1551 if (!mount->is_mounted) {
1552 /* This has just been unmounted. */
1553
1554 mount->from_proc_self_mountinfo = false;
1555
1556 switch (mount->state) {
1557
1558 case MOUNT_MOUNTED:
1559 mount_enter_dead(mount, true);
1560 break;
1561
1562 default:
1563 mount_set_state(mount, mount->state);
1564 break;
1565
1566 }
1567
1568 } else if (mount->just_mounted || mount->just_changed) {
1569
1570 /* New or changed entrymount */
1571
1572 switch (mount->state) {
1573
1574 case MOUNT_DEAD:
1575 case MOUNT_FAILED:
1576 mount_enter_mounted(mount, true);
1577 break;
1578
1579 case MOUNT_MOUNTING:
1580 mount_enter_mounting_done(mount);
1581 break;
1582
1583 default:
1584 /* Nothing really changed, but let's
1585 * issue an notification call
1586 * nonetheless, in case somebody is
1587 * waiting for this. (e.g. file system
1588 * ro/rw remounts.) */
1589 mount_set_state(mount, mount->state);
1590 break;
1591 }
1592 }
1593
1594 /* Reset the flags for later calls */
1595 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1596 }
1597 }
1598
1599 static void mount_reset_failed(Unit *u) {
1600 Mount *m = MOUNT(u);
1601
1602 assert(m);
1603
1604 if (m->state == MOUNT_FAILED)
1605 mount_set_state(m, MOUNT_DEAD);
1606
1607 m->failure = false;
1608 }
1609
1610 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1611 [MOUNT_DEAD] = "dead",
1612 [MOUNT_MOUNTING] = "mounting",
1613 [MOUNT_MOUNTING_DONE] = "mounting-done",
1614 [MOUNT_MOUNTED] = "mounted",
1615 [MOUNT_REMOUNTING] = "remounting",
1616 [MOUNT_UNMOUNTING] = "unmounting",
1617 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1618 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1619 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1620 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1621 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1622 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1623 [MOUNT_FAILED] = "failed"
1624 };
1625
1626 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1627
1628 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1629 [MOUNT_EXEC_MOUNT] = "ExecMount",
1630 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1631 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1632 };
1633
1634 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1635
1636 const UnitVTable mount_vtable = {
1637 .suffix = ".mount",
1638
1639 .no_alias = true,
1640 .no_instances = true,
1641 .no_isolate = true,
1642 .show_status = true,
1643
1644 .init = mount_init,
1645 .load = mount_load,
1646 .done = mount_done,
1647
1648 .coldplug = mount_coldplug,
1649
1650 .dump = mount_dump,
1651
1652 .start = mount_start,
1653 .stop = mount_stop,
1654 .reload = mount_reload,
1655
1656 .serialize = mount_serialize,
1657 .deserialize_item = mount_deserialize_item,
1658
1659 .active_state = mount_active_state,
1660 .sub_state_to_string = mount_sub_state_to_string,
1661
1662 .check_gc = mount_check_gc,
1663
1664 .sigchld_event = mount_sigchld_event,
1665 .timer_event = mount_timer_event,
1666
1667 .reset_failed = mount_reset_failed,
1668
1669 .bus_interface = "org.freedesktop.systemd1.Mount",
1670 .bus_message_handler = bus_mount_message_handler,
1671 .bus_invalidating_properties = bus_mount_invalidating_properties,
1672
1673 .enumerate = mount_enumerate,
1674 .shutdown = mount_shutdown
1675 };
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