]> git.ipfire.org Git - thirdparty/systemd.git/blob - src/core/mount.c
projects / thirdparty / systemd.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
core: adjust load functions for other unit types to be more like service
[thirdparty/systemd.git] / src / core / mount.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
2
3 #include <errno.h>
4 #include <signal.h>
5 #include <stdio.h>
6 #include <sys/epoll.h>
7
8 #include "sd-messages.h"
9
10 #include "alloc-util.h"
11 #include "dbus-mount.h"
12 #include "dbus-unit.h"
13 #include "device.h"
14 #include "exit-status.h"
15 #include "format-util.h"
16 #include "fstab-util.h"
17 #include "libmount-util.h"
18 #include "log.h"
19 #include "manager.h"
20 #include "mkdir.h"
21 #include "mount-setup.h"
22 #include "mount.h"
23 #include "mountpoint-util.h"
24 #include "parse-util.h"
25 #include "path-util.h"
26 #include "process-util.h"
27 #include "serialize.h"
28 #include "special.h"
29 #include "string-table.h"
30 #include "string-util.h"
31 #include "strv.h"
32 #include "unit-name.h"
33 #include "unit.h"
34
35 #define RETRY_UMOUNT_MAX 32
36
37 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
38 [MOUNT_DEAD] = UNIT_INACTIVE,
39 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
40 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVATING,
41 [MOUNT_MOUNTED] = UNIT_ACTIVE,
42 [MOUNT_REMOUNTING] = UNIT_RELOADING,
43 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
44 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
45 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
46 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
47 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
48 [MOUNT_FAILED] = UNIT_FAILED,
49 [MOUNT_CLEANING] = UNIT_MAINTENANCE,
50 };
51
52 static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
53 static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata);
54 static int mount_process_proc_self_mountinfo(Manager *m);
55
56 static bool MOUNT_STATE_WITH_PROCESS(MountState state) {
57 return IN_SET(state,
58 MOUNT_MOUNTING,
59 MOUNT_MOUNTING_DONE,
60 MOUNT_REMOUNTING,
61 MOUNT_REMOUNTING_SIGTERM,
62 MOUNT_REMOUNTING_SIGKILL,
63 MOUNT_UNMOUNTING,
64 MOUNT_UNMOUNTING_SIGTERM,
65 MOUNT_UNMOUNTING_SIGKILL,
66 MOUNT_CLEANING);
67 }
68
69 static bool mount_is_network(const MountParameters *p) {
70 assert(p);
71
72 if (fstab_test_option(p->options, "_netdev\0"))
73 return true;
74
75 if (p->fstype && fstype_is_network(p->fstype))
76 return true;
77
78 return false;
79 }
80
81 static bool mount_is_loop(const MountParameters *p) {
82 assert(p);
83
84 if (fstab_test_option(p->options, "loop\0"))
85 return true;
86
87 return false;
88 }
89
90 static bool mount_is_bind(const MountParameters *p) {
91 assert(p);
92
93 if (fstab_test_option(p->options, "bind\0" "rbind\0"))
94 return true;
95
96 if (p->fstype && STR_IN_SET(p->fstype, "bind", "rbind"))
97 return true;
98
99 return false;
100 }
101
102 static bool mount_is_bound_to_device(const Mount *m) {
103 const MountParameters *p;
104
105 if (m->from_fragment)
106 return true;
107
108 p = &m->parameters_proc_self_mountinfo;
109 return fstab_test_option(p->options, "x-systemd.device-bound\0");
110 }
111
112 static bool mount_needs_quota(const MountParameters *p) {
113 assert(p);
114
115 /* Quotas are not enabled on network filesystems, but we want them, for example, on storage connected via
116 * iscsi. We hence don't use mount_is_network() here, as that would also return true for _netdev devices. */
117 if (p->fstype && fstype_is_network(p->fstype))
118 return false;
119
120 if (mount_is_bind(p))
121 return false;
122
123 return fstab_test_option(p->options,
124 "usrquota\0" "grpquota\0" "quota\0" "usrjquota\0" "grpjquota\0");
125 }
126
127 static void mount_init(Unit *u) {
128 Mount *m = MOUNT(u);
129
130 assert(u);
131 assert(u->load_state == UNIT_STUB);
132
133 m->timeout_usec = u->manager->default_timeout_start_usec;
134
135 m->exec_context.std_output = u->manager->default_std_output;
136 m->exec_context.std_error = u->manager->default_std_error;
137
138 m->directory_mode = 0755;
139
140 /* We need to make sure that /usr/bin/mount is always called
141 * in the same process group as us, so that the autofs kernel
142 * side doesn't send us another mount request while we are
143 * already trying to comply its last one. */
144 m->exec_context.same_pgrp = true;
145
146 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
147
148 u->ignore_on_isolate = true;
149 }
150
151 static int mount_arm_timer(Mount *m, usec_t usec) {
152 int r;
153
154 assert(m);
155
156 if (m->timer_event_source) {
157 r = sd_event_source_set_time(m->timer_event_source, usec);
158 if (r < 0)
159 return r;
160
161 return sd_event_source_set_enabled(m->timer_event_source, SD_EVENT_ONESHOT);
162 }
163
164 if (usec == USEC_INFINITY)
165 return 0;
166
167 r = sd_event_add_time(
168 UNIT(m)->manager->event,
169 &m->timer_event_source,
170 CLOCK_MONOTONIC,
171 usec, 0,
172 mount_dispatch_timer, m);
173 if (r < 0)
174 return r;
175
176 (void) sd_event_source_set_description(m->timer_event_source, "mount-timer");
177
178 return 0;
179 }
180
181 static void mount_unwatch_control_pid(Mount *m) {
182 assert(m);
183
184 if (m->control_pid <= 0)
185 return;
186
187 unit_unwatch_pid(UNIT(m), m->control_pid);
188 m->control_pid = 0;
189 }
190
191 static void mount_parameters_done(MountParameters *p) {
192 assert(p);
193
194 p->what = mfree(p->what);
195 p->options = mfree(p->options);
196 p->fstype = mfree(p->fstype);
197 }
198
199 static void mount_done(Unit *u) {
200 Mount *m = MOUNT(u);
201
202 assert(m);
203
204 m->where = mfree(m->where);
205
206 mount_parameters_done(&m->parameters_proc_self_mountinfo);
207 mount_parameters_done(&m->parameters_fragment);
208
209 m->exec_runtime = exec_runtime_unref(m->exec_runtime, false);
210 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
211 m->control_command = NULL;
212
213 dynamic_creds_unref(&m->dynamic_creds);
214
215 mount_unwatch_control_pid(m);
216
217 m->timer_event_source = sd_event_source_unref(m->timer_event_source);
218 }
219
220 _pure_ static MountParameters* get_mount_parameters_fragment(Mount *m) {
221 assert(m);
222
223 if (m->from_fragment)
224 return &m->parameters_fragment;
225
226 return NULL;
227 }
228
229 _pure_ static MountParameters* get_mount_parameters(Mount *m) {
230 assert(m);
231
232 if (m->from_proc_self_mountinfo)
233 return &m->parameters_proc_self_mountinfo;
234
235 return get_mount_parameters_fragment(m);
236 }
237
238 static int update_parameters_proc_self_mountinfo(
239 Mount *m,
240 const char *what,
241 const char *options,
242 const char *fstype) {
243
244 MountParameters *p;
245 int r, q, w;
246
247 p = &m->parameters_proc_self_mountinfo;
248
249 r = free_and_strdup(&p->what, what);
250 if (r < 0)
251 return r;
252
253 q = free_and_strdup(&p->options, options);
254 if (q < 0)
255 return q;
256
257 w = free_and_strdup(&p->fstype, fstype);
258 if (w < 0)
259 return w;
260
261 return r > 0 || q > 0 || w > 0;
262 }
263
264 static int mount_add_mount_dependencies(Mount *m) {
265 MountParameters *pm;
266 Unit *other;
267 Iterator i;
268 Set *s;
269 int r;
270
271 assert(m);
272
273 if (!path_equal(m->where, "/")) {
274 _cleanup_free_ char *parent = NULL;
275
276 /* Adds in links to other mount points that might lie further up in the hierarchy */
277
278 parent = dirname_malloc(m->where);
279 if (!parent)
280 return -ENOMEM;
281
282 r = unit_require_mounts_for(UNIT(m), parent, UNIT_DEPENDENCY_IMPLICIT);
283 if (r < 0)
284 return r;
285 }
286
287 /* Adds in dependencies to other mount points that might be needed for the source path (if this is a bind mount
288 * or a loop mount) to be available. */
289 pm = get_mount_parameters_fragment(m);
290 if (pm && pm->what &&
291 path_is_absolute(pm->what) &&
292 (mount_is_bind(pm) || mount_is_loop(pm) || !mount_is_network(pm))) {
293
294 r = unit_require_mounts_for(UNIT(m), pm->what, UNIT_DEPENDENCY_FILE);
295 if (r < 0)
296 return r;
297 }
298
299 /* Adds in dependencies to other units that use this path or paths further down in the hierarchy */
300 s = manager_get_units_requiring_mounts_for(UNIT(m)->manager, m->where);
301 SET_FOREACH(other, s, i) {
302
303 if (other->load_state != UNIT_LOADED)
304 continue;
305
306 if (other == UNIT(m))
307 continue;
308
309 r = unit_add_dependency(other, UNIT_AFTER, UNIT(m), true, UNIT_DEPENDENCY_PATH);
310 if (r < 0)
311 return r;
312
313 if (UNIT(m)->fragment_path) {
314 /* If we have fragment configuration, then make this dependency required */
315 r = unit_add_dependency(other, UNIT_REQUIRES, UNIT(m), true, UNIT_DEPENDENCY_PATH);
316 if (r < 0)
317 return r;
318 }
319 }
320
321 return 0;
322 }
323
324 static int mount_add_device_dependencies(Mount *m) {
325 UnitDependencyMask mask;
326 MountParameters *p;
327 UnitDependency dep;
328 int r;
329
330 assert(m);
331
332 p = get_mount_parameters(m);
333 if (!p)
334 return 0;
335
336 if (!p->what)
337 return 0;
338
339 if (mount_is_bind(p))
340 return 0;
341
342 if (!is_device_path(p->what))
343 return 0;
344
345 /* /dev/root is a really weird thing, it's not a real device,
346 * but just a path the kernel exports for the root file system
347 * specified on the kernel command line. Ignore it here. */
348 if (path_equal(p->what, "/dev/root"))
349 return 0;
350
351 if (path_equal(m->where, "/"))
352 return 0;
353
354 /* Mount units from /proc/self/mountinfo are not bound to devices
355 * by default since they're subject to races when devices are
356 * unplugged. But the user can still force this dep with an
357 * appropriate option (or udev property) so the mount units are
358 * automatically stopped when the device disappears suddenly. */
359 dep = mount_is_bound_to_device(m) ? UNIT_BINDS_TO : UNIT_REQUIRES;
360
361 /* We always use 'what' from /proc/self/mountinfo if mounted */
362 mask = m->from_proc_self_mountinfo ? UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT : UNIT_DEPENDENCY_FILE;
363
364 r = unit_add_node_dependency(UNIT(m), p->what, false, dep, mask);
365 if (r < 0)
366 return r;
367
368 return 0;
369 }
370
371 static int mount_add_quota_dependencies(Mount *m) {
372 UnitDependencyMask mask;
373 MountParameters *p;
374 int r;
375
376 assert(m);
377
378 if (!MANAGER_IS_SYSTEM(UNIT(m)->manager))
379 return 0;
380
381 p = get_mount_parameters_fragment(m);
382 if (!p)
383 return 0;
384
385 if (!mount_needs_quota(p))
386 return 0;
387
388 mask = m->from_fragment ? UNIT_DEPENDENCY_FILE : UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT;
389
390 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, true, mask);
391 if (r < 0)
392 return r;
393
394 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, true, mask);
395 if (r < 0)
396 return r;
397
398 return 0;
399 }
400
401 static bool mount_is_extrinsic(Mount *m) {
402 MountParameters *p;
403 assert(m);
404
405 /* Returns true for all units that are "magic" and should be excluded from the usual start-up and shutdown
406 * dependencies. We call them "extrinsic" here, as they are generally mounted outside of the systemd dependency
407 * logic. We shouldn't attempt to manage them ourselves but it's fine if the user operates on them with us. */
408
409 if (!MANAGER_IS_SYSTEM(UNIT(m)->manager)) /* We only automatically manage mounts if we are in system mode */
410 return true;
411
412 if (PATH_IN_SET(m->where, /* Don't bother with the OS data itself */
413 "/",
414 "/usr"))
415 return true;
416
417 if (PATH_STARTSWITH_SET(m->where,
418 "/run/initramfs", /* This should stay around from before we boot until after we shutdown */
419 "/proc", /* All of this is API VFS */
420 "/sys", /* … dito … */
421 "/dev")) /* … dito … */
422 return true;
423
424 /* If this is an initrd mount, and we are not in the initrd, then leave this around forever, too. */
425 p = get_mount_parameters(m);
426 if (p && fstab_test_option(p->options, "x-initrd.mount\0") && !in_initrd())
427 return true;
428
429 return false;
430 }
431
432 static int mount_add_default_dependencies(Mount *m) {
433 const char *after, *before;
434 UnitDependencyMask mask;
435 MountParameters *p;
436 bool nofail;
437 int r;
438
439 assert(m);
440
441 if (!UNIT(m)->default_dependencies)
442 return 0;
443
444 /* We do not add any default dependencies to /, /usr or /run/initramfs/, since they are guaranteed to stay
445 * mounted the whole time, since our system is on it. Also, don't bother with anything mounted below virtual
446 * file systems, it's also going to be virtual, and hence not worth the effort. */
447 if (mount_is_extrinsic(m))
448 return 0;
449
450 p = get_mount_parameters(m);
451 if (!p)
452 return 0;
453
454 mask = m->from_fragment ? UNIT_DEPENDENCY_FILE : UNIT_DEPENDENCY_MOUNTINFO_DEFAULT;
455 nofail = m->from_fragment ? fstab_test_yes_no_option(m->parameters_fragment.options, "nofail\0" "fail\0") : false;
456
457 if (mount_is_network(p)) {
458 /* We order ourselves after network.target. This is
459 * primarily useful at shutdown: services that take
460 * down the network should order themselves before
461 * network.target, so that they are shut down only
462 * after this mount unit is stopped. */
463
464 r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_NETWORK_TARGET, true, mask);
465 if (r < 0)
466 return r;
467
468 /* We pull in network-online.target, and order
469 * ourselves after it. This is useful at start-up to
470 * actively pull in tools that want to be started
471 * before we start mounting network file systems, and
472 * whose purpose it is to delay this until the network
473 * is "up". */
474
475 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_WANTS, UNIT_AFTER, SPECIAL_NETWORK_ONLINE_TARGET, true, mask);
476 if (r < 0)
477 return r;
478
479 after = SPECIAL_REMOTE_FS_PRE_TARGET;
480 before = SPECIAL_REMOTE_FS_TARGET;
481 } else {
482 after = SPECIAL_LOCAL_FS_PRE_TARGET;
483 before = SPECIAL_LOCAL_FS_TARGET;
484 }
485
486 if (!nofail) {
487 r = unit_add_dependency_by_name(UNIT(m), UNIT_BEFORE, before, true, mask);
488 if (r < 0)
489 return r;
490 }
491
492 r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, true, mask);
493 if (r < 0)
494 return r;
495
496 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, true, mask);
497 if (r < 0)
498 return r;
499
500 /* If this is a tmpfs mount then we have to unmount it before we try to deactivate swaps */
501 if (streq_ptr(p->fstype, "tmpfs")) {
502 r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_SWAP_TARGET, true, mask);
503 if (r < 0)
504 return r;
505 }
506
507 return 0;
508 }
509
510 static int mount_verify(Mount *m) {
511 _cleanup_free_ char *e = NULL;
512 MountParameters *p;
513 int r;
514
515 assert(m);
516 assert(UNIT(m)->load_state == UNIT_LOADED);
517
518 if (!m->from_fragment && !m->from_proc_self_mountinfo && !UNIT(m)->perpetual)
519 return -ENOENT;
520
521 r = unit_name_from_path(m->where, ".mount", &e);
522 if (r < 0)
523 return log_unit_error_errno(UNIT(m), r, "Failed to generate unit name from mount path: %m");
524
525 if (!unit_has_name(UNIT(m), e)) {
526 log_unit_error(UNIT(m), "Where= setting doesn't match unit name. Refusing.");
527 return -ENOEXEC;
528 }
529
530 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
531 log_unit_error(UNIT(m), "Cannot create mount unit for API file system %s. Refusing.", m->where);
532 return -ENOEXEC;
533 }
534
535 p = get_mount_parameters_fragment(m);
536 if (p && !p->what) {
537 log_unit_error(UNIT(m), "What= setting is missing. Refusing.");
538 return -ENOEXEC;
539 }
540
541 if (m->exec_context.pam_name && m->kill_context.kill_mode != KILL_CONTROL_GROUP) {
542 log_unit_error(UNIT(m), "Unit has PAM enabled. Kill mode must be set to control-group'. Refusing.");
543 return -ENOEXEC;
544 }
545
546 return 0;
547 }
548
549 static int mount_add_extras(Mount *m) {
550 Unit *u = UNIT(m);
551 int r;
552
553 assert(m);
554
555 /* Note: this call might be called after we already have been loaded once (and even when it has already been
556 * activated), in case data from /proc/self/mountinfo has changed. This means all code here needs to be ready
557 * to run with an already set up unit. */
558
559 if (u->fragment_path)
560 m->from_fragment = true;
561
562 if (!m->where) {
563 r = unit_name_to_path(u->id, &m->where);
564 if (r < 0)
565 return r;
566 }
567
568 path_simplify(m->where, false);
569
570 if (!u->description) {
571 r = unit_set_description(u, m->where);
572 if (r < 0)
573 return r;
574 }
575
576 r = mount_add_device_dependencies(m);
577 if (r < 0)
578 return r;
579
580 r = mount_add_mount_dependencies(m);
581 if (r < 0)
582 return r;
583
584 r = mount_add_quota_dependencies(m);
585 if (r < 0)
586 return r;
587
588 r = unit_patch_contexts(u);
589 if (r < 0)
590 return r;
591
592 r = unit_add_exec_dependencies(u, &m->exec_context);
593 if (r < 0)
594 return r;
595
596 r = unit_set_default_slice(u);
597 if (r < 0)
598 return r;
599
600 r = mount_add_default_dependencies(m);
601 if (r < 0)
602 return r;
603
604 return 0;
605 }
606
607 static void mount_load_root_mount(Unit *u) {
608 assert(u);
609
610 if (!unit_has_name(u, SPECIAL_ROOT_MOUNT))
611 return;
612
613 u->perpetual = true;
614 u->default_dependencies = false;
615
616 /* The stdio/kmsg bridge socket is on /, in order to avoid a dep loop, don't use kmsg logging for -.mount */
617 MOUNT(u)->exec_context.std_output = EXEC_OUTPUT_NULL;
618 MOUNT(u)->exec_context.std_input = EXEC_INPUT_NULL;
619
620 if (!u->description)
621 u->description = strdup("Root Mount");
622 }
623
624 static int mount_load(Unit *u) {
625 Mount *m = MOUNT(u);
626 int r, q = 0;
627
628 assert(u);
629 assert(u->load_state == UNIT_STUB);
630
631 mount_load_root_mount(u);
632
633 bool fragment_optional = m->from_proc_self_mountinfo || u->perpetual;
634 r = unit_load_fragment_and_dropin(u, !fragment_optional);
635
636 /* Add in some extras. Note we do this in all cases (even if we failed to load the unit) when announced by the
637 * kernel, because we need some things to be set up no matter what when the kernel establishes a mount and thus
638 * we need to update the state in our unit to track it. After all, consider that we don't allow changing the
639 * 'slice' field for a unit once it is active. */
640 if (u->load_state == UNIT_LOADED || m->from_proc_self_mountinfo || u->perpetual)
641 q = mount_add_extras(m);
642
643 if (r < 0)
644 return r;
645 if (q < 0)
646 return q;
647 if (u->load_state != UNIT_LOADED)
648 return 0;
649
650 return mount_verify(m);
651 }
652
653 static void mount_set_state(Mount *m, MountState state) {
654 MountState old_state;
655 assert(m);
656
657 if (m->state != state)
658 bus_unit_send_pending_change_signal(UNIT(m), false);
659
660 old_state = m->state;
661 m->state = state;
662
663 if (!MOUNT_STATE_WITH_PROCESS(state)) {
664 m->timer_event_source = sd_event_source_unref(m->timer_event_source);
665 mount_unwatch_control_pid(m);
666 m->control_command = NULL;
667 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
668 }
669
670 if (state != old_state)
671 log_unit_debug(UNIT(m), "Changed %s -> %s", mount_state_to_string(old_state), mount_state_to_string(state));
672
673 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state],
674 m->reload_result == MOUNT_SUCCESS ? 0 : UNIT_NOTIFY_RELOAD_FAILURE);
675 }
676
677 static int mount_coldplug(Unit *u) {
678 Mount *m = MOUNT(u);
679 MountState new_state = MOUNT_DEAD;
680 int r;
681
682 assert(m);
683 assert(m->state == MOUNT_DEAD);
684
685 if (m->deserialized_state != m->state)
686 new_state = m->deserialized_state;
687 else if (m->from_proc_self_mountinfo)
688 new_state = MOUNT_MOUNTED;
689
690 if (new_state == m->state)
691 return 0;
692
693 if (m->control_pid > 0 &&
694 pid_is_unwaited(m->control_pid) &&
695 MOUNT_STATE_WITH_PROCESS(new_state)) {
696
697 r = unit_watch_pid(UNIT(m), m->control_pid, false);
698 if (r < 0)
699 return r;
700
701 r = mount_arm_timer(m, usec_add(u->state_change_timestamp.monotonic, m->timeout_usec));
702 if (r < 0)
703 return r;
704 }
705
706 if (!IN_SET(new_state, MOUNT_DEAD, MOUNT_FAILED)) {
707 (void) unit_setup_dynamic_creds(u);
708 (void) unit_setup_exec_runtime(u);
709 }
710
711 mount_set_state(m, new_state);
712 return 0;
713 }
714
715 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
716 char buf[FORMAT_TIMESPAN_MAX];
717 Mount *m = MOUNT(u);
718 MountParameters *p;
719
720 assert(m);
721 assert(f);
722
723 p = get_mount_parameters(m);
724
725 fprintf(f,
726 "%sMount State: %s\n"
727 "%sResult: %s\n"
728 "%sClean Result: %s\n"
729 "%sWhere: %s\n"
730 "%sWhat: %s\n"
731 "%sFile System Type: %s\n"
732 "%sOptions: %s\n"
733 "%sFrom /proc/self/mountinfo: %s\n"
734 "%sFrom fragment: %s\n"
735 "%sExtrinsic: %s\n"
736 "%sDirectoryMode: %04o\n"
737 "%sSloppyOptions: %s\n"
738 "%sLazyUnmount: %s\n"
739 "%sForceUnmount: %s\n"
740 "%sTimeoutSec: %s\n",
741 prefix, mount_state_to_string(m->state),
742 prefix, mount_result_to_string(m->result),
743 prefix, mount_result_to_string(m->clean_result),
744 prefix, m->where,
745 prefix, p ? strna(p->what) : "n/a",
746 prefix, p ? strna(p->fstype) : "n/a",
747 prefix, p ? strna(p->options) : "n/a",
748 prefix, yes_no(m->from_proc_self_mountinfo),
749 prefix, yes_no(m->from_fragment),
750 prefix, yes_no(mount_is_extrinsic(m)),
751 prefix, m->directory_mode,
752 prefix, yes_no(m->sloppy_options),
753 prefix, yes_no(m->lazy_unmount),
754 prefix, yes_no(m->force_unmount),
755 prefix, format_timespan(buf, sizeof(buf), m->timeout_usec, USEC_PER_SEC));
756
757 if (m->control_pid > 0)
758 fprintf(f,
759 "%sControl PID: "PID_FMT"\n",
760 prefix, m->control_pid);
761
762 exec_context_dump(&m->exec_context, f, prefix);
763 kill_context_dump(&m->kill_context, f, prefix);
764 cgroup_context_dump(UNIT(m), f, prefix);
765 }
766
767 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
768
769 _cleanup_(exec_params_clear) ExecParameters exec_params = {
770 .flags = EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN,
771 .stdin_fd = -1,
772 .stdout_fd = -1,
773 .stderr_fd = -1,
774 .exec_fd = -1,
775 };
776 pid_t pid;
777 int r;
778
779 assert(m);
780 assert(c);
781 assert(_pid);
782
783 r = unit_prepare_exec(UNIT(m));
784 if (r < 0)
785 return r;
786
787 r = mount_arm_timer(m, usec_add(now(CLOCK_MONOTONIC), m->timeout_usec));
788 if (r < 0)
789 return r;
790
791 r = unit_set_exec_params(UNIT(m), &exec_params);
792 if (r < 0)
793 return r;
794
795 r = exec_spawn(UNIT(m),
796 c,
797 &m->exec_context,
798 &exec_params,
799 m->exec_runtime,
800 &m->dynamic_creds,
801 &pid);
802 if (r < 0)
803 return r;
804
805 r = unit_watch_pid(UNIT(m), pid, true);
806 if (r < 0)
807 return r;
808
809 *_pid = pid;
810
811 return 0;
812 }
813
814 static void mount_enter_dead(Mount *m, MountResult f) {
815 assert(m);
816
817 if (m->result == MOUNT_SUCCESS)
818 m->result = f;
819
820 unit_log_result(UNIT(m), m->result == MOUNT_SUCCESS, mount_result_to_string(m->result));
821 mount_set_state(m, m->result != MOUNT_SUCCESS ? MOUNT_FAILED : MOUNT_DEAD);
822
823 m->exec_runtime = exec_runtime_unref(m->exec_runtime, true);
824
825 unit_destroy_runtime_directory(UNIT(m), &m->exec_context);
826
827 unit_unref_uid_gid(UNIT(m), true);
828
829 dynamic_creds_destroy(&m->dynamic_creds);
830
831 /* Any dependencies based on /proc/self/mountinfo are now stale */
832 unit_remove_dependencies(UNIT(m), UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT);
833 }
834
835 static void mount_enter_mounted(Mount *m, MountResult f) {
836 assert(m);
837
838 if (m->result == MOUNT_SUCCESS)
839 m->result = f;
840
841 mount_set_state(m, MOUNT_MOUNTED);
842 }
843
844 static void mount_enter_dead_or_mounted(Mount *m, MountResult f) {
845 assert(m);
846
847 /* Enter DEAD or MOUNTED state, depending on what the kernel currently says about the mount point. We use this
848 * whenever we executed an operation, so that our internal state reflects what the kernel says again, after all
849 * ultimately we just mirror the kernel's internal state on this. */
850
851 if (m->from_proc_self_mountinfo)
852 mount_enter_mounted(m, f);
853 else
854 mount_enter_dead(m, f);
855 }
856
857 static int state_to_kill_operation(MountState state) {
858 switch (state) {
859
860 case MOUNT_REMOUNTING_SIGTERM:
861 return KILL_RESTART;
862
863 case MOUNT_UNMOUNTING_SIGTERM:
864 return KILL_TERMINATE;
865
866 case MOUNT_REMOUNTING_SIGKILL:
867 case MOUNT_UNMOUNTING_SIGKILL:
868 return KILL_KILL;
869
870 default:
871 return _KILL_OPERATION_INVALID;
872 }
873 }
874
875 static void mount_enter_signal(Mount *m, MountState state, MountResult f) {
876 int r;
877
878 assert(m);
879
880 if (m->result == MOUNT_SUCCESS)
881 m->result = f;
882
883 r = unit_kill_context(
884 UNIT(m),
885 &m->kill_context,
886 state_to_kill_operation(state),
887 -1,
888 m->control_pid,
889 false);
890 if (r < 0)
891 goto fail;
892
893 if (r > 0) {
894 r = mount_arm_timer(m, usec_add(now(CLOCK_MONOTONIC), m->timeout_usec));
895 if (r < 0)
896 goto fail;
897
898 mount_set_state(m, state);
899 } else if (state == MOUNT_REMOUNTING_SIGTERM && m->kill_context.send_sigkill)
900 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_SUCCESS);
901 else if (IN_SET(state, MOUNT_REMOUNTING_SIGTERM, MOUNT_REMOUNTING_SIGKILL))
902 mount_enter_mounted(m, MOUNT_SUCCESS);
903 else if (state == MOUNT_UNMOUNTING_SIGTERM && m->kill_context.send_sigkill)
904 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_SUCCESS);
905 else
906 mount_enter_dead_or_mounted(m, MOUNT_SUCCESS);
907
908 return;
909
910 fail:
911 log_unit_warning_errno(UNIT(m), r, "Failed to kill processes: %m");
912 mount_enter_dead_or_mounted(m, MOUNT_FAILURE_RESOURCES);
913 }
914
915 static void mount_enter_unmounting(Mount *m) {
916 int r;
917
918 assert(m);
919
920 /* Start counting our attempts */
921 if (!IN_SET(m->state,
922 MOUNT_UNMOUNTING,
923 MOUNT_UNMOUNTING_SIGTERM,
924 MOUNT_UNMOUNTING_SIGKILL))
925 m->n_retry_umount = 0;
926
927 m->control_command_id = MOUNT_EXEC_UNMOUNT;
928 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
929
930 r = exec_command_set(m->control_command, UMOUNT_PATH, m->where, "-c", NULL);
931 if (r >= 0 && m->lazy_unmount)
932 r = exec_command_append(m->control_command, "-l", NULL);
933 if (r >= 0 && m->force_unmount)
934 r = exec_command_append(m->control_command, "-f", NULL);
935 if (r < 0)
936 goto fail;
937
938 mount_unwatch_control_pid(m);
939
940 r = mount_spawn(m, m->control_command, &m->control_pid);
941 if (r < 0)
942 goto fail;
943
944 mount_set_state(m, MOUNT_UNMOUNTING);
945
946 return;
947
948 fail:
949 log_unit_warning_errno(UNIT(m), r, "Failed to run 'umount' task: %m");
950 mount_enter_dead_or_mounted(m, MOUNT_FAILURE_RESOURCES);
951 }
952
953 static void mount_enter_mounting(Mount *m) {
954 int r;
955 MountParameters *p;
956
957 assert(m);
958
959 r = unit_fail_if_noncanonical(UNIT(m), m->where);
960 if (r < 0)
961 goto fail;
962
963 (void) mkdir_p_label(m->where, m->directory_mode);
964
965 unit_warn_if_dir_nonempty(UNIT(m), m->where);
966 unit_warn_leftover_processes(UNIT(m));
967
968 m->control_command_id = MOUNT_EXEC_MOUNT;
969 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
970
971 /* Create the source directory for bind-mounts if needed */
972 p = get_mount_parameters_fragment(m);
973 if (p && mount_is_bind(p))
974 (void) mkdir_p_label(p->what, m->directory_mode);
975
976 if (p) {
977 _cleanup_free_ char *opts = NULL;
978
979 r = fstab_filter_options(p->options, "nofail\0" "noauto\0" "auto\0", NULL, NULL, &opts);
980 if (r < 0)
981 goto fail;
982
983 r = exec_command_set(m->control_command, MOUNT_PATH, p->what, m->where, NULL);
984 if (r >= 0 && m->sloppy_options)
985 r = exec_command_append(m->control_command, "-s", NULL);
986 if (r >= 0 && p->fstype)
987 r = exec_command_append(m->control_command, "-t", p->fstype, NULL);
988 if (r >= 0 && !isempty(opts))
989 r = exec_command_append(m->control_command, "-o", opts, NULL);
990 } else
991 r = -ENOENT;
992 if (r < 0)
993 goto fail;
994
995 mount_unwatch_control_pid(m);
996
997 r = mount_spawn(m, m->control_command, &m->control_pid);
998 if (r < 0)
999 goto fail;
1000
1001 mount_set_state(m, MOUNT_MOUNTING);
1002
1003 return;
1004
1005 fail:
1006 log_unit_warning_errno(UNIT(m), r, "Failed to run 'mount' task: %m");
1007 mount_enter_dead_or_mounted(m, MOUNT_FAILURE_RESOURCES);
1008 }
1009
1010 static void mount_set_reload_result(Mount *m, MountResult result) {
1011 assert(m);
1012
1013 /* Only store the first error we encounter */
1014 if (m->reload_result != MOUNT_SUCCESS)
1015 return;
1016
1017 m->reload_result = result;
1018 }
1019
1020 static void mount_enter_remounting(Mount *m) {
1021 int r;
1022 MountParameters *p;
1023
1024 assert(m);
1025
1026 /* Reset reload result when we are about to start a new remount operation */
1027 m->reload_result = MOUNT_SUCCESS;
1028
1029 m->control_command_id = MOUNT_EXEC_REMOUNT;
1030 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
1031
1032 p = get_mount_parameters_fragment(m);
1033 if (p) {
1034 const char *o;
1035
1036 if (p->options)
1037 o = strjoina("remount,", p->options);
1038 else
1039 o = "remount";
1040
1041 r = exec_command_set(m->control_command, MOUNT_PATH,
1042 p->what, m->where,
1043 "-o", o, NULL);
1044 if (r >= 0 && m->sloppy_options)
1045 r = exec_command_append(m->control_command, "-s", NULL);
1046 if (r >= 0 && p->fstype)
1047 r = exec_command_append(m->control_command, "-t", p->fstype, NULL);
1048 } else
1049 r = -ENOENT;
1050 if (r < 0)
1051 goto fail;
1052
1053 mount_unwatch_control_pid(m);
1054
1055 r = mount_spawn(m, m->control_command, &m->control_pid);
1056 if (r < 0)
1057 goto fail;
1058
1059 mount_set_state(m, MOUNT_REMOUNTING);
1060
1061 return;
1062
1063 fail:
1064 log_unit_warning_errno(UNIT(m), r, "Failed to run 'remount' task: %m");
1065 mount_set_reload_result(m, MOUNT_FAILURE_RESOURCES);
1066 mount_enter_dead_or_mounted(m, MOUNT_SUCCESS);
1067 }
1068
1069 static void mount_cycle_clear(Mount *m) {
1070 assert(m);
1071
1072 /* Clear all state we shall forget for this new cycle */
1073
1074 m->result = MOUNT_SUCCESS;
1075 m->reload_result = MOUNT_SUCCESS;
1076 exec_command_reset_status_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
1077 UNIT(m)->reset_accounting = true;
1078 }
1079
1080 static int mount_start(Unit *u) {
1081 Mount *m = MOUNT(u);
1082 int r;
1083
1084 assert(m);
1085
1086 /* We cannot fulfill this request right now, try again later
1087 * please! */
1088 if (IN_SET(m->state,
1089 MOUNT_UNMOUNTING,
1090 MOUNT_UNMOUNTING_SIGTERM,
1091 MOUNT_UNMOUNTING_SIGKILL,
1092 MOUNT_CLEANING))
1093 return -EAGAIN;
1094
1095 /* Already on it! */
1096 if (m->state == MOUNT_MOUNTING)
1097 return 0;
1098
1099 assert(IN_SET(m->state, MOUNT_DEAD, MOUNT_FAILED));
1100
1101 r = unit_test_start_limit(u);
1102 if (r < 0) {
1103 mount_enter_dead(m, MOUNT_FAILURE_START_LIMIT_HIT);
1104 return r;
1105 }
1106
1107 r = unit_acquire_invocation_id(u);
1108 if (r < 0)
1109 return r;
1110
1111 mount_cycle_clear(m);
1112 mount_enter_mounting(m);
1113
1114 return 1;
1115 }
1116
1117 static int mount_stop(Unit *u) {
1118 Mount *m = MOUNT(u);
1119
1120 assert(m);
1121
1122 switch (m->state) {
1123
1124 case MOUNT_UNMOUNTING:
1125 case MOUNT_UNMOUNTING_SIGKILL:
1126 case MOUNT_UNMOUNTING_SIGTERM:
1127 /* Already on it */
1128 return 0;
1129
1130 case MOUNT_MOUNTING:
1131 case MOUNT_MOUNTING_DONE:
1132 case MOUNT_REMOUNTING:
1133 /* If we are still waiting for /bin/mount, we go directly into kill mode. */
1134 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_SUCCESS);
1135 return 0;
1136
1137 case MOUNT_REMOUNTING_SIGTERM:
1138 /* If we are already waiting for a hung remount, convert this to the matching unmounting state */
1139 mount_set_state(m, MOUNT_UNMOUNTING_SIGTERM);
1140 return 0;
1141
1142 case MOUNT_REMOUNTING_SIGKILL:
1143 /* as above */
1144 mount_set_state(m, MOUNT_UNMOUNTING_SIGKILL);
1145 return 0;
1146
1147 case MOUNT_MOUNTED:
1148 mount_enter_unmounting(m);
1149 return 1;
1150
1151 case MOUNT_CLEANING:
1152 /* If we are currently cleaning, then abort it, brutally. */
1153 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_SUCCESS);
1154 return 0;
1155
1156 default:
1157 assert_not_reached("Unexpected state.");
1158 }
1159 }
1160
1161 static int mount_reload(Unit *u) {
1162 Mount *m = MOUNT(u);
1163
1164 assert(m);
1165 assert(m->state == MOUNT_MOUNTED);
1166
1167 mount_enter_remounting(m);
1168
1169 return 1;
1170 }
1171
1172 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1173 Mount *m = MOUNT(u);
1174
1175 assert(m);
1176 assert(f);
1177 assert(fds);
1178
1179 (void) serialize_item(f, "state", mount_state_to_string(m->state));
1180 (void) serialize_item(f, "result", mount_result_to_string(m->result));
1181 (void) serialize_item(f, "reload-result", mount_result_to_string(m->reload_result));
1182 (void) serialize_item_format(f, "n-retry-umount", "%u", m->n_retry_umount);
1183
1184 if (m->control_pid > 0)
1185 (void) serialize_item_format(f, "control-pid", PID_FMT, m->control_pid);
1186
1187 if (m->control_command_id >= 0)
1188 (void) serialize_item(f, "control-command", mount_exec_command_to_string(m->control_command_id));
1189
1190 return 0;
1191 }
1192
1193 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1194 Mount *m = MOUNT(u);
1195 int r;
1196
1197 assert(u);
1198 assert(key);
1199 assert(value);
1200 assert(fds);
1201
1202 if (streq(key, "state")) {
1203 MountState state;
1204
1205 if ((state = mount_state_from_string(value)) < 0)
1206 log_unit_debug(u, "Failed to parse state value: %s", value);
1207 else
1208 m->deserialized_state = state;
1209
1210 } else if (streq(key, "result")) {
1211 MountResult f;
1212
1213 f = mount_result_from_string(value);
1214 if (f < 0)
1215 log_unit_debug(u, "Failed to parse result value: %s", value);
1216 else if (f != MOUNT_SUCCESS)
1217 m->result = f;
1218
1219 } else if (streq(key, "reload-result")) {
1220 MountResult f;
1221
1222 f = mount_result_from_string(value);
1223 if (f < 0)
1224 log_unit_debug(u, "Failed to parse reload result value: %s", value);
1225 else if (f != MOUNT_SUCCESS)
1226 m->reload_result = f;
1227
1228 } else if (streq(key, "n-retry-umount")) {
1229
1230 r = safe_atou(value, &m->n_retry_umount);
1231 if (r < 0)
1232 log_unit_debug(u, "Failed to parse n-retry-umount value: %s", value);
1233
1234 } else if (streq(key, "control-pid")) {
1235
1236 if (parse_pid(value, &m->control_pid) < 0)
1237 log_unit_debug(u, "Failed to parse control-pid value: %s", value);
1238
1239 } else if (streq(key, "control-command")) {
1240 MountExecCommand id;
1241
1242 id = mount_exec_command_from_string(value);
1243 if (id < 0)
1244 log_unit_debug(u, "Failed to parse exec-command value: %s", value);
1245 else {
1246 m->control_command_id = id;
1247 m->control_command = m->exec_command + id;
1248 }
1249 } else
1250 log_unit_debug(u, "Unknown serialization key: %s", key);
1251
1252 return 0;
1253 }
1254
1255 _pure_ static UnitActiveState mount_active_state(Unit *u) {
1256 assert(u);
1257
1258 return state_translation_table[MOUNT(u)->state];
1259 }
1260
1261 _pure_ static const char *mount_sub_state_to_string(Unit *u) {
1262 assert(u);
1263
1264 return mount_state_to_string(MOUNT(u)->state);
1265 }
1266
1267 _pure_ static bool mount_may_gc(Unit *u) {
1268 Mount *m = MOUNT(u);
1269
1270 assert(m);
1271
1272 if (m->from_proc_self_mountinfo)
1273 return false;
1274
1275 return true;
1276 }
1277
1278 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1279 Mount *m = MOUNT(u);
1280 MountResult f;
1281
1282 assert(m);
1283 assert(pid >= 0);
1284
1285 if (pid != m->control_pid)
1286 return;
1287
1288 /* So here's the thing, we really want to know before /usr/bin/mount or /usr/bin/umount exit whether
1289 * they established/remove a mount. This is important when mounting, but even more so when unmounting
1290 * since we need to deal with nested mounts and otherwise cannot safely determine whether to repeat
1291 * the unmounts. In theory, the kernel fires /proc/self/mountinfo changes off before returning from
1292 * the mount() or umount() syscalls, and thus we should see the changes to the proc file before we
1293 * process the waitid() for the /usr/bin/(u)mount processes. However, this is unfortunately racy: we
1294 * have to waitid() for processes using P_ALL (since we need to reap unexpected children that got
1295 * reparented to PID 1), but when using P_ALL we might end up reaping processes that terminated just
1296 * instants ago, i.e. already after our last event loop iteration (i.e. after the last point we might
1297 * have noticed /proc/self/mountinfo events via epoll). This means event loop priorities for
1298 * processing SIGCHLD vs. /proc/self/mountinfo IO events are not as relevant as we want. To fix that
1299 * race, let's explicitly scan /proc/self/mountinfo before we start processing /usr/bin/(u)mount
1300 * dying. It's ugly, but it makes our ordering systematic again, and makes sure we always see
1301 * /proc/self/mountinfo changes before our mount/umount exits. */
1302 (void) mount_process_proc_self_mountinfo(u->manager);
1303
1304 m->control_pid = 0;
1305
1306 if (is_clean_exit(code, status, EXIT_CLEAN_COMMAND, NULL))
1307 f = MOUNT_SUCCESS;
1308 else if (code == CLD_EXITED)
1309 f = MOUNT_FAILURE_EXIT_CODE;
1310 else if (code == CLD_KILLED)
1311 f = MOUNT_FAILURE_SIGNAL;
1312 else if (code == CLD_DUMPED)
1313 f = MOUNT_FAILURE_CORE_DUMP;
1314 else
1315 assert_not_reached("Unknown code");
1316
1317 if (IN_SET(m->state, MOUNT_REMOUNTING, MOUNT_REMOUNTING_SIGKILL, MOUNT_REMOUNTING_SIGTERM))
1318 mount_set_reload_result(m, f);
1319 else if (m->result == MOUNT_SUCCESS)
1320 m->result = f;
1321
1322 if (m->control_command) {
1323 exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status);
1324
1325 m->control_command = NULL;
1326 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1327 }
1328
1329 unit_log_process_exit(
1330 u,
1331 "Mount process",
1332 mount_exec_command_to_string(m->control_command_id),
1333 f == MOUNT_SUCCESS,
1334 code, status);
1335
1336 /* Note that due to the io event priority logic, we can be sure the new mountinfo is loaded
1337 * before we process the SIGCHLD for the mount command. */
1338
1339 switch (m->state) {
1340
1341 case MOUNT_MOUNTING:
1342 /* Our mount point has not appeared in mountinfo. Something went wrong. */
1343
1344 if (f == MOUNT_SUCCESS) {
1345 /* Either /bin/mount has an unexpected definition of success,
1346 * or someone raced us and we lost. */
1347 log_unit_warning(UNIT(m), "Mount process finished, but there is no mount.");
1348 f = MOUNT_FAILURE_PROTOCOL;
1349 }
1350 mount_enter_dead(m, f);
1351 break;
1352
1353 case MOUNT_MOUNTING_DONE:
1354 mount_enter_mounted(m, f);
1355 break;
1356
1357 case MOUNT_REMOUNTING:
1358 case MOUNT_REMOUNTING_SIGTERM:
1359 case MOUNT_REMOUNTING_SIGKILL:
1360 mount_enter_dead_or_mounted(m, MOUNT_SUCCESS);
1361 break;
1362
1363 case MOUNT_UNMOUNTING:
1364
1365 if (f == MOUNT_SUCCESS && m->from_proc_self_mountinfo) {
1366
1367 /* Still a mount point? If so, let's try again. Most likely there were multiple mount points
1368 * stacked on top of each other. We might exceed the timeout specified by the user overall,
1369 * but we will stop as soon as any one umount times out. */
1370
1371 if (m->n_retry_umount < RETRY_UMOUNT_MAX) {
1372 log_unit_debug(u, "Mount still present, trying again.");
1373 m->n_retry_umount++;
1374 mount_enter_unmounting(m);
1375 } else {
1376 log_unit_warning(u, "Mount still present after %u attempts to unmount, giving up.", m->n_retry_umount);
1377 mount_enter_mounted(m, f);
1378 }
1379 } else
1380 mount_enter_dead_or_mounted(m, f);
1381
1382 break;
1383
1384 case MOUNT_UNMOUNTING_SIGKILL:
1385 case MOUNT_UNMOUNTING_SIGTERM:
1386 mount_enter_dead_or_mounted(m, f);
1387 break;
1388
1389 case MOUNT_CLEANING:
1390 if (m->clean_result == MOUNT_SUCCESS)
1391 m->clean_result = f;
1392
1393 mount_enter_dead(m, MOUNT_SUCCESS);
1394 break;
1395
1396 default:
1397 assert_not_reached("Uh, control process died at wrong time.");
1398 }
1399
1400 /* Notify clients about changed exit status */
1401 unit_add_to_dbus_queue(u);
1402 }
1403
1404 static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
1405 Mount *m = MOUNT(userdata);
1406
1407 assert(m);
1408 assert(m->timer_event_source == source);
1409
1410 switch (m->state) {
1411
1412 case MOUNT_MOUNTING:
1413 case MOUNT_MOUNTING_DONE:
1414 log_unit_warning(UNIT(m), "Mounting timed out. Terminating.");
1415 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
1416 break;
1417
1418 case MOUNT_REMOUNTING:
1419 log_unit_warning(UNIT(m), "Remounting timed out. Terminating remount process.");
1420 mount_set_reload_result(m, MOUNT_FAILURE_TIMEOUT);
1421 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, MOUNT_SUCCESS);
1422 break;
1423
1424 case MOUNT_REMOUNTING_SIGTERM:
1425 mount_set_reload_result(m, MOUNT_FAILURE_TIMEOUT);
1426
1427 if (m->kill_context.send_sigkill) {
1428 log_unit_warning(UNIT(m), "Remounting timed out. Killing.");
1429 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_SUCCESS);
1430 } else {
1431 log_unit_warning(UNIT(m), "Remounting timed out. Skipping SIGKILL. Ignoring.");
1432 mount_enter_dead_or_mounted(m, MOUNT_SUCCESS);
1433 }
1434 break;
1435
1436 case MOUNT_REMOUNTING_SIGKILL:
1437 mount_set_reload_result(m, MOUNT_FAILURE_TIMEOUT);
1438
1439 log_unit_warning(UNIT(m), "Mount process still around after SIGKILL. Ignoring.");
1440 mount_enter_dead_or_mounted(m, MOUNT_SUCCESS);
1441 break;
1442
1443 case MOUNT_UNMOUNTING:
1444 log_unit_warning(UNIT(m), "Unmounting timed out. Terminating.");
1445 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
1446 break;
1447
1448 case MOUNT_UNMOUNTING_SIGTERM:
1449 if (m->kill_context.send_sigkill) {
1450 log_unit_warning(UNIT(m), "Mount process timed out. Killing.");
1451 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1452 } else {
1453 log_unit_warning(UNIT(m), "Mount process timed out. Skipping SIGKILL. Ignoring.");
1454 mount_enter_dead_or_mounted(m, MOUNT_FAILURE_TIMEOUT);
1455 }
1456 break;
1457
1458 case MOUNT_UNMOUNTING_SIGKILL:
1459 log_unit_warning(UNIT(m), "Mount process still around after SIGKILL. Ignoring.");
1460 mount_enter_dead_or_mounted(m, MOUNT_FAILURE_TIMEOUT);
1461 break;
1462
1463 case MOUNT_CLEANING:
1464 log_unit_warning(UNIT(m), "Cleaning timed out. killing.");
1465
1466 if (m->clean_result == MOUNT_SUCCESS)
1467 m->clean_result = MOUNT_FAILURE_TIMEOUT;
1468
1469 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, 0);
1470 break;
1471
1472 default:
1473 assert_not_reached("Timeout at wrong time.");
1474 }
1475
1476 return 0;
1477 }
1478
1479 static int mount_setup_new_unit(
1480 Manager *m,
1481 const char *name,
1482 const char *what,
1483 const char *where,
1484 const char *options,
1485 const char *fstype,
1486 MountProcFlags *ret_flags,
1487 Unit **ret) {
1488
1489 _cleanup_(unit_freep) Unit *u = NULL;
1490 int r;
1491
1492 assert(m);
1493 assert(name);
1494 assert(ret_flags);
1495 assert(ret);
1496
1497 r = unit_new_for_name(m, sizeof(Mount), name, &u);
1498 if (r < 0)
1499 return r;
1500
1501 r = free_and_strdup(&u->source_path, "/proc/self/mountinfo");
1502 if (r < 0)
1503 return r;
1504
1505 r = free_and_strdup(&MOUNT(u)->where, where);
1506 if (r < 0)
1507 return r;
1508
1509 r = update_parameters_proc_self_mountinfo(MOUNT(u), what, options, fstype);
1510 if (r < 0)
1511 return r;
1512
1513 /* This unit was generated because /proc/self/mountinfo reported it. Remember this, so that by the time we load
1514 * the unit file for it (and thus add in extra deps right after) we know what source to attributes the deps
1515 * to.*/
1516 MOUNT(u)->from_proc_self_mountinfo = true;
1517
1518 /* We have only allocated the stub now, let's enqueue this unit for loading now, so that everything else is
1519 * loaded in now. */
1520 unit_add_to_load_queue(u);
1521
1522 *ret_flags = MOUNT_PROC_IS_MOUNTED | MOUNT_PROC_JUST_MOUNTED | MOUNT_PROC_JUST_CHANGED;
1523 *ret = TAKE_PTR(u);
1524 return 0;
1525 }
1526
1527 static int mount_setup_existing_unit(
1528 Unit *u,
1529 const char *what,
1530 const char *where,
1531 const char *options,
1532 const char *fstype,
1533 MountProcFlags *ret_flags) {
1534
1535 MountProcFlags flags = MOUNT_PROC_IS_MOUNTED;
1536 int r;
1537
1538 assert(u);
1539 assert(flags);
1540
1541 if (!MOUNT(u)->where) {
1542 MOUNT(u)->where = strdup(where);
1543 if (!MOUNT(u)->where)
1544 return -ENOMEM;
1545 }
1546
1547 r = update_parameters_proc_self_mountinfo(MOUNT(u), what, options, fstype);
1548 if (r < 0)
1549 return r;
1550 if (r > 0)
1551 flags |= MOUNT_PROC_JUST_CHANGED;
1552
1553 if (!MOUNT(u)->from_proc_self_mountinfo || FLAGS_SET(MOUNT(u)->proc_flags, MOUNT_PROC_JUST_MOUNTED))
1554 flags |= MOUNT_PROC_JUST_MOUNTED;
1555
1556 MOUNT(u)->from_proc_self_mountinfo = true;
1557
1558 if (IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_BAD_SETTING, UNIT_ERROR)) {
1559 /* The unit was previously not found or otherwise not loaded. Now that the unit shows up in
1560 * /proc/self/mountinfo we should reconsider it this, hence set it to UNIT_LOADED. */
1561 u->load_state = UNIT_LOADED;
1562 u->load_error = 0;
1563
1564 flags |= MOUNT_PROC_JUST_CHANGED;
1565 }
1566
1567 if (FLAGS_SET(flags, MOUNT_PROC_JUST_CHANGED)) {
1568 /* If things changed, then make sure that all deps are regenerated. Let's
1569 * first remove all automatic deps, and then add in the new ones. */
1570
1571 unit_remove_dependencies(u, UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT);
1572
1573 r = mount_add_extras(MOUNT(u));
1574 if (r < 0)
1575 return r;
1576 }
1577
1578 *ret_flags = flags;
1579 return 0;
1580 }
1581
1582 static int mount_setup_unit(
1583 Manager *m,
1584 const char *what,
1585 const char *where,
1586 const char *options,
1587 const char *fstype,
1588 bool set_flags) {
1589
1590 _cleanup_free_ char *e = NULL;
1591 MountProcFlags flags;
1592 Unit *u;
1593 int r;
1594
1595 assert(m);
1596 assert(what);
1597 assert(where);
1598 assert(options);
1599 assert(fstype);
1600
1601 /* Ignore API mount points. They should never be referenced in
1602 * dependencies ever. */
1603 if (mount_point_is_api(where) || mount_point_ignore(where))
1604 return 0;
1605
1606 if (streq(fstype, "autofs"))
1607 return 0;
1608
1609 /* probably some kind of swap, ignore */
1610 if (!is_path(where))
1611 return 0;
1612
1613 r = unit_name_from_path(where, ".mount", &e);
1614 if (r < 0)
1615 return log_error_errno(r, "Failed to generate unit name from path '%s': %m", where);
1616
1617 u = manager_get_unit(m, e);
1618 if (u)
1619 r = mount_setup_existing_unit(u, what, where, options, fstype, &flags);
1620 else
1621 /* First time we see this mount point meaning that it's not been initiated by a mount unit but rather
1622 * by the sysadmin having called mount(8) directly. */
1623 r = mount_setup_new_unit(m, e, what, where, options, fstype, &flags, &u);
1624 if (r < 0)
1625 return log_warning_errno(r, "Failed to set up mount unit: %m");
1626
1627 /* If the mount changed properties or state, let's notify our clients */
1628 if (flags & (MOUNT_PROC_JUST_CHANGED|MOUNT_PROC_JUST_MOUNTED))
1629 unit_add_to_dbus_queue(u);
1630
1631 if (set_flags)
1632 MOUNT(u)->proc_flags = flags;
1633
1634 return 0;
1635 }
1636
1637 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1638 _cleanup_(mnt_free_tablep) struct libmnt_table *table = NULL;
1639 _cleanup_(mnt_free_iterp) struct libmnt_iter *iter = NULL;
1640 int r;
1641
1642 assert(m);
1643
1644 r = libmount_parse(NULL, NULL, &table, &iter);
1645 if (r < 0)
1646 return log_error_errno(r, "Failed to parse /proc/self/mountinfo: %m");
1647
1648 for (;;) {
1649 struct libmnt_fs *fs;
1650 const char *device, *path, *options, *fstype;
1651
1652 r = mnt_table_next_fs(table, iter, &fs);
1653 if (r == 1)
1654 break;
1655 if (r < 0)
1656 return log_error_errno(r, "Failed to get next entry from /proc/self/mountinfo: %m");
1657
1658 device = mnt_fs_get_source(fs);
1659 path = mnt_fs_get_target(fs);
1660 options = mnt_fs_get_options(fs);
1661 fstype = mnt_fs_get_fstype(fs);
1662
1663 if (!device || !path)
1664 continue;
1665
1666 device_found_node(m, device, DEVICE_FOUND_MOUNT, DEVICE_FOUND_MOUNT);
1667
1668 (void) mount_setup_unit(m, device, path, options, fstype, set_flags);
1669 }
1670
1671 return 0;
1672 }
1673
1674 static void mount_shutdown(Manager *m) {
1675 assert(m);
1676
1677 m->mount_event_source = sd_event_source_unref(m->mount_event_source);
1678
1679 mnt_unref_monitor(m->mount_monitor);
1680 m->mount_monitor = NULL;
1681 }
1682
1683 static int mount_get_timeout(Unit *u, usec_t *timeout) {
1684 Mount *m = MOUNT(u);
1685 usec_t t;
1686 int r;
1687
1688 if (!m->timer_event_source)
1689 return 0;
1690
1691 r = sd_event_source_get_time(m->timer_event_source, &t);
1692 if (r < 0)
1693 return r;
1694 if (t == USEC_INFINITY)
1695 return 0;
1696
1697 *timeout = t;
1698 return 1;
1699 }
1700
1701 static void mount_enumerate_perpetual(Manager *m) {
1702 Unit *u;
1703 int r;
1704
1705 assert(m);
1706
1707 /* Whatever happens, we know for sure that the root directory is around, and cannot go away. Let's
1708 * unconditionally synthesize it here and mark it as perpetual. */
1709
1710 u = manager_get_unit(m, SPECIAL_ROOT_MOUNT);
1711 if (!u) {
1712 r = unit_new_for_name(m, sizeof(Mount), SPECIAL_ROOT_MOUNT, &u);
1713 if (r < 0) {
1714 log_error_errno(r, "Failed to allocate the special " SPECIAL_ROOT_MOUNT " unit: %m");
1715 return;
1716 }
1717 }
1718
1719 u->perpetual = true;
1720 MOUNT(u)->deserialized_state = MOUNT_MOUNTED;
1721
1722 unit_add_to_load_queue(u);
1723 unit_add_to_dbus_queue(u);
1724 }
1725
1726 static bool mount_is_mounted(Mount *m) {
1727 assert(m);
1728
1729 return UNIT(m)->perpetual || FLAGS_SET(m->proc_flags, MOUNT_PROC_IS_MOUNTED);
1730 }
1731
1732 static void mount_enumerate(Manager *m) {
1733 int r;
1734
1735 assert(m);
1736
1737 mnt_init_debug(0);
1738
1739 if (!m->mount_monitor) {
1740 int fd;
1741
1742 m->mount_monitor = mnt_new_monitor();
1743 if (!m->mount_monitor) {
1744 log_oom();
1745 goto fail;
1746 }
1747
1748 r = mnt_monitor_enable_kernel(m->mount_monitor, 1);
1749 if (r < 0) {
1750 log_error_errno(r, "Failed to enable watching of kernel mount events: %m");
1751 goto fail;
1752 }
1753
1754 r = mnt_monitor_enable_userspace(m->mount_monitor, 1, NULL);
1755 if (r < 0) {
1756 log_error_errno(r, "Failed to enable watching of userspace mount events: %m");
1757 goto fail;
1758 }
1759
1760 /* mnt_unref_monitor() will close the fd */
1761 fd = r = mnt_monitor_get_fd(m->mount_monitor);
1762 if (r < 0) {
1763 log_error_errno(r, "Failed to acquire watch file descriptor: %m");
1764 goto fail;
1765 }
1766
1767 r = sd_event_add_io(m->event, &m->mount_event_source, fd, EPOLLIN, mount_dispatch_io, m);
1768 if (r < 0) {
1769 log_error_errno(r, "Failed to watch mount file descriptor: %m");
1770 goto fail;
1771 }
1772
1773 r = sd_event_source_set_priority(m->mount_event_source, SD_EVENT_PRIORITY_NORMAL-10);
1774 if (r < 0) {
1775 log_error_errno(r, "Failed to adjust mount watch priority: %m");
1776 goto fail;
1777 }
1778
1779 (void) sd_event_source_set_description(m->mount_event_source, "mount-monitor-dispatch");
1780 }
1781
1782 r = mount_load_proc_self_mountinfo(m, false);
1783 if (r < 0)
1784 goto fail;
1785
1786 return;
1787
1788 fail:
1789 mount_shutdown(m);
1790 }
1791
1792 static int drain_libmount(Manager *m) {
1793 bool rescan = false;
1794 int r;
1795
1796 assert(m);
1797
1798 /* Drain all events and verify that the event is valid.
1799 *
1800 * Note that libmount also monitors /run/mount mkdir if the directory does not exist yet. The mkdir
1801 * may generate event which is irrelevant for us.
1802 *
1803 * error: r < 0; valid: r == 0, false positive: r == 1 */
1804 do {
1805 r = mnt_monitor_next_change(m->mount_monitor, NULL, NULL);
1806 if (r < 0)
1807 return log_error_errno(r, "Failed to drain libmount events: %m");
1808 if (r == 0)
1809 rescan = true;
1810 } while (r == 0);
1811
1812 return rescan;
1813 }
1814
1815 static int mount_process_proc_self_mountinfo(Manager *m) {
1816 _cleanup_set_free_free_ Set *around = NULL, *gone = NULL;
1817 const char *what;
1818 Iterator i;
1819 Unit *u;
1820 int r;
1821
1822 assert(m);
1823
1824 r = drain_libmount(m);
1825 if (r <= 0)
1826 return r;
1827
1828 r = mount_load_proc_self_mountinfo(m, true);
1829 if (r < 0) {
1830 /* Reset flags, just in case, for later calls */
1831 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT])
1832 MOUNT(u)->proc_flags = 0;
1833
1834 return 0;
1835 }
1836
1837 manager_dispatch_load_queue(m);
1838
1839 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
1840 Mount *mount = MOUNT(u);
1841
1842 if (!mount_is_mounted(mount)) {
1843
1844 /* A mount point is not around right now. It
1845 * might be gone, or might never have
1846 * existed. */
1847
1848 if (mount->from_proc_self_mountinfo &&
1849 mount->parameters_proc_self_mountinfo.what) {
1850
1851 /* Remember that this device might just have disappeared */
1852 if (set_ensure_allocated(&gone, &path_hash_ops) < 0 ||
1853 set_put_strdup(gone, mount->parameters_proc_self_mountinfo.what) < 0)
1854 log_oom(); /* we don't care too much about OOM here... */
1855 }
1856
1857 mount->from_proc_self_mountinfo = false;
1858 assert_se(update_parameters_proc_self_mountinfo(mount, NULL, NULL, NULL) >= 0);
1859
1860 switch (mount->state) {
1861
1862 case MOUNT_MOUNTED:
1863 /* This has just been unmounted by somebody else, follow the state change. */
1864 mount_enter_dead(mount, MOUNT_SUCCESS);
1865 break;
1866
1867 default:
1868 break;
1869 }
1870
1871 } else if (mount->proc_flags & (MOUNT_PROC_JUST_MOUNTED|MOUNT_PROC_JUST_CHANGED)) {
1872
1873 /* A mount point was added or changed */
1874
1875 switch (mount->state) {
1876
1877 case MOUNT_DEAD:
1878 case MOUNT_FAILED:
1879
1880 /* This has just been mounted by somebody else, follow the state change, but let's
1881 * generate a new invocation ID for this implicitly and automatically. */
1882 (void) unit_acquire_invocation_id(u);
1883 mount_cycle_clear(mount);
1884 mount_enter_mounted(mount, MOUNT_SUCCESS);
1885 break;
1886
1887 case MOUNT_MOUNTING:
1888 mount_set_state(mount, MOUNT_MOUNTING_DONE);
1889 break;
1890
1891 default:
1892 /* Nothing really changed, but let's
1893 * issue an notification call
1894 * nonetheless, in case somebody is
1895 * waiting for this. (e.g. file system
1896 * ro/rw remounts.) */
1897 mount_set_state(mount, mount->state);
1898 break;
1899 }
1900 }
1901
1902 if (mount_is_mounted(mount) &&
1903 mount->from_proc_self_mountinfo &&
1904 mount->parameters_proc_self_mountinfo.what) {
1905 /* Track devices currently used */
1906
1907 if (set_ensure_allocated(&around, &path_hash_ops) < 0 ||
1908 set_put_strdup(around, mount->parameters_proc_self_mountinfo.what) < 0)
1909 log_oom();
1910 }
1911
1912 /* Reset the flags for later calls */
1913 mount->proc_flags = 0;
1914 }
1915
1916 SET_FOREACH(what, gone, i) {
1917 if (set_contains(around, what))
1918 continue;
1919
1920 /* Let the device units know that the device is no longer mounted */
1921 device_found_node(m, what, 0, DEVICE_FOUND_MOUNT);
1922 }
1923
1924 return 0;
1925 }
1926
1927 static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1928 Manager *m = userdata;
1929
1930 assert(m);
1931 assert(revents & EPOLLIN);
1932
1933 return mount_process_proc_self_mountinfo(m);
1934 }
1935
1936 static void mount_reset_failed(Unit *u) {
1937 Mount *m = MOUNT(u);
1938
1939 assert(m);
1940
1941 if (m->state == MOUNT_FAILED)
1942 mount_set_state(m, MOUNT_DEAD);
1943
1944 m->result = MOUNT_SUCCESS;
1945 m->reload_result = MOUNT_SUCCESS;
1946 m->clean_result = MOUNT_SUCCESS;
1947 }
1948
1949 static int mount_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
1950 Mount *m = MOUNT(u);
1951
1952 assert(m);
1953
1954 return unit_kill_common(u, who, signo, -1, m->control_pid, error);
1955 }
1956
1957 static int mount_control_pid(Unit *u) {
1958 Mount *m = MOUNT(u);
1959
1960 assert(m);
1961
1962 return m->control_pid;
1963 }
1964
1965 static int mount_clean(Unit *u, ExecCleanMask mask) {
1966 _cleanup_strv_free_ char **l = NULL;
1967 Mount *m = MOUNT(u);
1968 int r;
1969
1970 assert(m);
1971 assert(mask != 0);
1972
1973 if (m->state != MOUNT_DEAD)
1974 return -EBUSY;
1975
1976 r = exec_context_get_clean_directories(&m->exec_context, u->manager->prefix, mask, &l);
1977 if (r < 0)
1978 return r;
1979
1980 if (strv_isempty(l))
1981 return -EUNATCH;
1982
1983 mount_unwatch_control_pid(m);
1984 m->clean_result = MOUNT_SUCCESS;
1985 m->control_command = NULL;
1986 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1987
1988 r = mount_arm_timer(m, usec_add(now(CLOCK_MONOTONIC), m->exec_context.timeout_clean_usec));
1989 if (r < 0)
1990 goto fail;
1991
1992 r = unit_fork_and_watch_rm_rf(u, l, &m->control_pid);
1993 if (r < 0)
1994 goto fail;
1995
1996 mount_set_state(m, MOUNT_CLEANING);
1997
1998 return 0;
1999
2000 fail:
2001 log_unit_warning_errno(u, r, "Failed to initiate cleaning: %m");
2002 m->clean_result = MOUNT_FAILURE_RESOURCES;
2003 m->timer_event_source = sd_event_source_unref(m->timer_event_source);
2004 return r;
2005 }
2006
2007 static int mount_can_clean(Unit *u, ExecCleanMask *ret) {
2008 Mount *m = MOUNT(u);
2009
2010 assert(m);
2011
2012 return exec_context_get_clean_mask(&m->exec_context, ret);
2013 }
2014
2015 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
2016 [MOUNT_EXEC_MOUNT] = "ExecMount",
2017 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
2018 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
2019 };
2020
2021 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
2022
2023 static const char* const mount_result_table[_MOUNT_RESULT_MAX] = {
2024 [MOUNT_SUCCESS] = "success",
2025 [MOUNT_FAILURE_RESOURCES] = "resources",
2026 [MOUNT_FAILURE_TIMEOUT] = "timeout",
2027 [MOUNT_FAILURE_EXIT_CODE] = "exit-code",
2028 [MOUNT_FAILURE_SIGNAL] = "signal",
2029 [MOUNT_FAILURE_CORE_DUMP] = "core-dump",
2030 [MOUNT_FAILURE_START_LIMIT_HIT] = "start-limit-hit",
2031 [MOUNT_FAILURE_PROTOCOL] = "protocol",
2032 };
2033
2034 DEFINE_STRING_TABLE_LOOKUP(mount_result, MountResult);
2035
2036 const UnitVTable mount_vtable = {
2037 .object_size = sizeof(Mount),
2038 .exec_context_offset = offsetof(Mount, exec_context),
2039 .cgroup_context_offset = offsetof(Mount, cgroup_context),
2040 .kill_context_offset = offsetof(Mount, kill_context),
2041 .exec_runtime_offset = offsetof(Mount, exec_runtime),
2042 .dynamic_creds_offset = offsetof(Mount, dynamic_creds),
2043
2044 .sections =
2045 "Unit\0"
2046 "Mount\0"
2047 "Install\0",
2048 .private_section = "Mount",
2049
2050 .init = mount_init,
2051 .load = mount_load,
2052 .done = mount_done,
2053
2054 .coldplug = mount_coldplug,
2055
2056 .dump = mount_dump,
2057
2058 .start = mount_start,
2059 .stop = mount_stop,
2060 .reload = mount_reload,
2061
2062 .kill = mount_kill,
2063 .clean = mount_clean,
2064 .can_clean = mount_can_clean,
2065
2066 .serialize = mount_serialize,
2067 .deserialize_item = mount_deserialize_item,
2068
2069 .active_state = mount_active_state,
2070 .sub_state_to_string = mount_sub_state_to_string,
2071
2072 .will_restart = unit_will_restart_default,
2073
2074 .may_gc = mount_may_gc,
2075
2076 .sigchld_event = mount_sigchld_event,
2077
2078 .reset_failed = mount_reset_failed,
2079
2080 .control_pid = mount_control_pid,
2081
2082 .bus_vtable = bus_mount_vtable,
2083 .bus_set_property = bus_mount_set_property,
2084 .bus_commit_properties = bus_mount_commit_properties,
2085
2086 .get_timeout = mount_get_timeout,
2087
2088 .can_transient = true,
2089
2090 .enumerate_perpetual = mount_enumerate_perpetual,
2091 .enumerate = mount_enumerate,
2092 .shutdown = mount_shutdown,
2093
2094 .status_message_formats = {
2095 .starting_stopping = {
2096 [0] = "Mounting %s...",
2097 [1] = "Unmounting %s...",
2098 },
2099 .finished_start_job = {
2100 [JOB_DONE] = "Mounted %s.",
2101 [JOB_FAILED] = "Failed to mount %s.",
2102 [JOB_TIMEOUT] = "Timed out mounting %s.",
2103 },
2104 .finished_stop_job = {
2105 [JOB_DONE] = "Unmounted %s.",
2106 [JOB_FAILED] = "Failed unmounting %s.",
2107 [JOB_TIMEOUT] = "Timed out unmounting %s.",
2108 },
2109 },
2110 };
Unnamed repository; edit this file 'description' to name the repository.