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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 #include "bus-errors.h"
39 #include "exit-status.h"
40 #include "def.h"
41
42 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
43 [MOUNT_DEAD] = UNIT_INACTIVE,
44 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
45 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
46 [MOUNT_MOUNTED] = UNIT_ACTIVE,
47 [MOUNT_REMOUNTING] = UNIT_RELOADING,
48 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
49 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
50 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
51 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
52 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
53 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
54 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
55 [MOUNT_FAILED] = UNIT_FAILED
56 };
57
58 static void mount_init(Unit *u) {
59 Mount *m = MOUNT(u);
60
61 assert(u);
62 assert(u->meta.load_state == UNIT_STUB);
63
64 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
65 m->directory_mode = 0755;
66
67 exec_context_init(&m->exec_context);
68 m->exec_context.std_output = EXEC_OUTPUT_KMSG;
69
70 /* We need to make sure that /bin/mount is always called in
71 * the same process group as us, so that the autofs kernel
72 * side doesn't send us another mount request while we are
73 * already trying to comply its last one. */
74 m->exec_context.same_pgrp = true;
75
76 m->timer_watch.type = WATCH_INVALID;
77
78 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
79 }
80
81 static void mount_unwatch_control_pid(Mount *m) {
82 assert(m);
83
84 if (m->control_pid <= 0)
85 return;
86
87 unit_unwatch_pid(UNIT(m), m->control_pid);
88 m->control_pid = 0;
89 }
90
91 static void mount_parameters_done(MountParameters *p) {
92 assert(p);
93
94 free(p->what);
95 free(p->options);
96 free(p->fstype);
97
98 p->what = p->options = p->fstype = NULL;
99 }
100
101 static void mount_done(Unit *u) {
102 Mount *m = MOUNT(u);
103 Meta *other;
104
105 assert(m);
106
107 free(m->where);
108 m->where = NULL;
109
110 /* Try to detach us from the automount unit if there is any */
111 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT]) {
112 Automount *a = (Automount*) other;
113
114 if (a->mount == m)
115 a->mount = NULL;
116 }
117
118 mount_parameters_done(&m->parameters_etc_fstab);
119 mount_parameters_done(&m->parameters_proc_self_mountinfo);
120 mount_parameters_done(&m->parameters_fragment);
121
122 exec_context_done(&m->exec_context);
123 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
124 m->control_command = NULL;
125
126 mount_unwatch_control_pid(m);
127
128 unit_unwatch_timer(u, &m->timer_watch);
129 }
130
131 static MountParameters* get_mount_parameters_configured(Mount *m) {
132 assert(m);
133
134 if (m->from_fragment)
135 return &m->parameters_fragment;
136 else if (m->from_etc_fstab)
137 return &m->parameters_etc_fstab;
138
139 return NULL;
140 }
141
142 static MountParameters* get_mount_parameters(Mount *m) {
143 assert(m);
144
145 if (m->from_proc_self_mountinfo)
146 return &m->parameters_proc_self_mountinfo;
147
148 return get_mount_parameters_configured(m);
149 }
150
151 static int mount_add_mount_links(Mount *m) {
152 Meta *other;
153 int r;
154 MountParameters *pm;
155
156 assert(m);
157
158 pm = get_mount_parameters_configured(m);
159
160 /* Adds in links to other mount points that might lie below or
161 * above us in the hierarchy */
162
163 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
164 Mount *n = (Mount*) other;
165 MountParameters *pn;
166
167 if (n == m)
168 continue;
169
170 if (n->meta.load_state != UNIT_LOADED)
171 continue;
172
173 pn = get_mount_parameters_configured(n);
174
175 if (path_startswith(m->where, n->where)) {
176
177 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
178 return r;
179
180 if (pn)
181 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
182 return r;
183
184 } else if (path_startswith(n->where, m->where)) {
185
186 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
187 return r;
188
189 if (pm)
190 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
191 return r;
192
193 } else if (pm && path_startswith(pm->what, n->where)) {
194
195 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
196 return r;
197
198 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
199 return r;
200
201 } else if (pn && path_startswith(pn->what, m->where)) {
202
203 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
204 return r;
205
206 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
207 return r;
208 }
209 }
210
211 return 0;
212 }
213
214 static int mount_add_swap_links(Mount *m) {
215 Meta *other;
216 int r;
217
218 assert(m);
219
220 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
221 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
222 return r;
223
224 return 0;
225 }
226
227 static int mount_add_path_links(Mount *m) {
228 Meta *other;
229 int r;
230
231 assert(m);
232
233 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
234 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
235 return r;
236
237 return 0;
238 }
239
240 static int mount_add_automount_links(Mount *m) {
241 Meta *other;
242 int r;
243
244 assert(m);
245
246 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
247 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
248 return r;
249
250 return 0;
251 }
252
253 static int mount_add_socket_links(Mount *m) {
254 Meta *other;
255 int r;
256
257 assert(m);
258
259 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
260 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
261 return r;
262
263 return 0;
264 }
265
266 static char* mount_test_option(const char *haystack, const char *needle) {
267 struct mntent me;
268
269 assert(needle);
270
271 /* Like glibc's hasmntopt(), but works on a string, not a
272 * struct mntent */
273
274 if (!haystack)
275 return false;
276
277 zero(me);
278 me.mnt_opts = (char*) haystack;
279
280 return hasmntopt(&me, needle);
281 }
282
283 static bool mount_is_network(MountParameters *p) {
284 assert(p);
285
286 if (mount_test_option(p->options, "_netdev"))
287 return true;
288
289 if (p->fstype && fstype_is_network(p->fstype))
290 return true;
291
292 return false;
293 }
294
295 static bool mount_is_bind(MountParameters *p) {
296 assert(p);
297
298 if (mount_test_option(p->options, "bind"))
299 return true;
300
301 if (p->fstype && streq(p->fstype, "bind"))
302 return true;
303
304 return false;
305 }
306
307 static bool needs_quota(MountParameters *p) {
308 assert(p);
309
310 if (mount_is_network(p))
311 return false;
312
313 if (mount_is_bind(p))
314 return false;
315
316 return mount_test_option(p->options, "usrquota") ||
317 mount_test_option(p->options, "grpquota");
318 }
319
320 static int mount_add_target_links(Mount *m) {
321 const char *target, *after = NULL;
322 MountParameters *p;
323 Unit *tu;
324 int r;
325 bool noauto, nofail, handle, automount;
326
327 assert(m);
328
329 if (!(p = get_mount_parameters_configured(m)))
330 return 0;
331
332 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
333 nofail = !!mount_test_option(p->options, "nofail");
334 handle =
335 mount_test_option(p->options, "comment=systemd.mount") ||
336 mount_test_option(p->options, "x-systemd-mount") ||
337 m->meta.manager->mount_auto;
338 automount =
339 mount_test_option(p->options, "comment=systemd.automount") ||
340 mount_test_option(p->options, "x-systemd-automount");
341
342 if (mount_is_network(p)) {
343 target = SPECIAL_REMOTE_FS_TARGET;
344
345 if (m->meta.manager->running_as == MANAGER_SYSTEM)
346 after = SPECIAL_NETWORK_TARGET;
347 } else
348 target = SPECIAL_LOCAL_FS_TARGET;
349
350 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
351 return r;
352
353 if (after)
354 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
355 return r;
356
357 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
358 Unit *am;
359
360 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
361 return r;
362
363 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
364 } else {
365
366 /* Automatically add mount points that aren't natively
367 * configured to local-fs.target */
368 if (!noauto &&
369 !nofail &&
370 handle &&
371 m->from_etc_fstab &&
372 m->meta.manager->running_as == MANAGER_SYSTEM)
373 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
374 return r;
375
376 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
377 }
378 }
379
380 static int mount_add_device_links(Mount *m) {
381 MountParameters *p;
382 int r;
383
384 assert(m);
385
386 if (!(p = get_mount_parameters_configured(m)))
387 return 0;
388
389 if (!p->what)
390 return 0;
391
392 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
393 bool nofail, noauto;
394
395 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
396 nofail = !!mount_test_option(p->options, "nofail");
397
398 if ((r = unit_add_node_link(UNIT(m), p->what,
399 !noauto && nofail &&
400 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
401 return r;
402 }
403
404 if (p->passno > 0 &&
405 !mount_is_bind(p) &&
406 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
407 !path_equal(m->where, "/")) {
408 char *name;
409 Unit *fsck;
410 /* Let's add in the fsck service */
411
412 /* aka SPECIAL_FSCK_SERVICE */
413 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
414 return -ENOMEM;
415
416 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
417 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
418 free(name);
419 return r;
420 }
421
422 free(name);
423
424 SERVICE(fsck)->fsck_passno = p->passno;
425
426 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
427 return r;
428 }
429
430 return 0;
431 }
432
433 static int mount_add_default_dependencies(Mount *m) {
434 int r;
435
436 assert(m);
437
438 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
439 !path_equal(m->where, "/")) {
440 MountParameters *p;
441
442 p = get_mount_parameters_configured(m);
443
444 if (p && needs_quota(p)) {
445 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
446 (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
447 return r;
448 }
449
450 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
451 return r;
452 }
453
454 return 0;
455 }
456
457 static int mount_verify(Mount *m) {
458 bool b;
459 char *e;
460 assert(m);
461
462 if (m->meta.load_state != UNIT_LOADED)
463 return 0;
464
465 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
466 return -ENOENT;
467
468 if (!(e = unit_name_from_path(m->where, ".mount")))
469 return -ENOMEM;
470
471 b = unit_has_name(UNIT(m), e);
472 free(e);
473
474 if (!b) {
475 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
476 return -EINVAL;
477 }
478
479 if (m->meta.fragment_path && !m->parameters_fragment.what) {
480 log_error("%s's What setting is missing. Refusing.", m->meta.id);
481 return -EBADMSG;
482 }
483
484 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
485 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
486 return -EINVAL;
487 }
488
489 return 0;
490 }
491
492 static int mount_load(Unit *u) {
493 Mount *m = MOUNT(u);
494 int r;
495
496 assert(u);
497 assert(u->meta.load_state == UNIT_STUB);
498
499 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
500 return r;
501
502 /* This is a new unit? Then let's add in some extras */
503 if (u->meta.load_state == UNIT_LOADED) {
504 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
505 return r;
506
507 if (m->meta.fragment_path)
508 m->from_fragment = true;
509
510 if (!m->where)
511 if (!(m->where = unit_name_to_path(u->meta.id)))
512 return -ENOMEM;
513
514 path_kill_slashes(m->where);
515
516 if (!m->meta.description)
517 if ((r = unit_set_description(u, m->where)) < 0)
518 return r;
519
520 if ((r = mount_add_device_links(m)) < 0)
521 return r;
522
523 if ((r = mount_add_mount_links(m)) < 0)
524 return r;
525
526 if ((r = mount_add_socket_links(m)) < 0)
527 return r;
528
529 if ((r = mount_add_swap_links(m)) < 0)
530 return r;
531
532 if ((r = mount_add_path_links(m)) < 0)
533 return r;
534
535 if ((r = mount_add_automount_links(m)) < 0)
536 return r;
537
538 if ((r = mount_add_target_links(m)) < 0)
539 return r;
540
541 if ((r = unit_add_default_cgroups(u)) < 0)
542 return r;
543
544 if (m->meta.default_dependencies)
545 if ((r = mount_add_default_dependencies(m)) < 0)
546 return r;
547 }
548
549 return mount_verify(m);
550 }
551
552 static int mount_notify_automount(Mount *m, int status) {
553 Unit *p;
554 int r;
555
556 assert(m);
557
558 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
559 return r == -ENOENT ? 0 : r;
560
561 return automount_send_ready(AUTOMOUNT(p), status);
562 }
563
564 static void mount_set_state(Mount *m, MountState state) {
565 MountState old_state;
566 assert(m);
567
568 old_state = m->state;
569 m->state = state;
570
571 if (state != MOUNT_MOUNTING &&
572 state != MOUNT_MOUNTING_DONE &&
573 state != MOUNT_REMOUNTING &&
574 state != MOUNT_UNMOUNTING &&
575 state != MOUNT_MOUNTING_SIGTERM &&
576 state != MOUNT_MOUNTING_SIGKILL &&
577 state != MOUNT_UNMOUNTING_SIGTERM &&
578 state != MOUNT_UNMOUNTING_SIGKILL &&
579 state != MOUNT_REMOUNTING_SIGTERM &&
580 state != MOUNT_REMOUNTING_SIGKILL) {
581 unit_unwatch_timer(UNIT(m), &m->timer_watch);
582 mount_unwatch_control_pid(m);
583 m->control_command = NULL;
584 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
585 }
586
587 if (state == MOUNT_MOUNTED ||
588 state == MOUNT_REMOUNTING)
589 mount_notify_automount(m, 0);
590 else if (state == MOUNT_DEAD ||
591 state == MOUNT_UNMOUNTING ||
592 state == MOUNT_MOUNTING_SIGTERM ||
593 state == MOUNT_MOUNTING_SIGKILL ||
594 state == MOUNT_REMOUNTING_SIGTERM ||
595 state == MOUNT_REMOUNTING_SIGKILL ||
596 state == MOUNT_UNMOUNTING_SIGTERM ||
597 state == MOUNT_UNMOUNTING_SIGKILL ||
598 state == MOUNT_FAILED)
599 mount_notify_automount(m, -ENODEV);
600
601 if (state != old_state)
602 log_debug("%s changed %s -> %s",
603 m->meta.id,
604 mount_state_to_string(old_state),
605 mount_state_to_string(state));
606
607 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
608 m->reload_failure = false;
609 }
610
611 static int mount_coldplug(Unit *u) {
612 Mount *m = MOUNT(u);
613 MountState new_state = MOUNT_DEAD;
614 int r;
615
616 assert(m);
617 assert(m->state == MOUNT_DEAD);
618
619 if (m->deserialized_state != m->state)
620 new_state = m->deserialized_state;
621 else if (m->from_proc_self_mountinfo)
622 new_state = MOUNT_MOUNTED;
623
624 if (new_state != m->state) {
625
626 if (new_state == MOUNT_MOUNTING ||
627 new_state == MOUNT_MOUNTING_DONE ||
628 new_state == MOUNT_REMOUNTING ||
629 new_state == MOUNT_UNMOUNTING ||
630 new_state == MOUNT_MOUNTING_SIGTERM ||
631 new_state == MOUNT_MOUNTING_SIGKILL ||
632 new_state == MOUNT_UNMOUNTING_SIGTERM ||
633 new_state == MOUNT_UNMOUNTING_SIGKILL ||
634 new_state == MOUNT_REMOUNTING_SIGTERM ||
635 new_state == MOUNT_REMOUNTING_SIGKILL) {
636
637 if (m->control_pid <= 0)
638 return -EBADMSG;
639
640 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
641 return r;
642
643 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
644 return r;
645 }
646
647 mount_set_state(m, new_state);
648 }
649
650 return 0;
651 }
652
653 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
654 Mount *m = MOUNT(u);
655 MountParameters *p;
656
657 assert(m);
658 assert(f);
659
660 p = get_mount_parameters(m);
661
662 fprintf(f,
663 "%sMount State: %s\n"
664 "%sWhere: %s\n"
665 "%sWhat: %s\n"
666 "%sFile System Type: %s\n"
667 "%sOptions: %s\n"
668 "%sFrom /etc/fstab: %s\n"
669 "%sFrom /proc/self/mountinfo: %s\n"
670 "%sFrom fragment: %s\n"
671 "%sDirectoryMode: %04o\n",
672 prefix, mount_state_to_string(m->state),
673 prefix, m->where,
674 prefix, strna(p->what),
675 prefix, strna(p->fstype),
676 prefix, strna(p->options),
677 prefix, yes_no(m->from_etc_fstab),
678 prefix, yes_no(m->from_proc_self_mountinfo),
679 prefix, yes_no(m->from_fragment),
680 prefix, m->directory_mode);
681
682 if (m->control_pid > 0)
683 fprintf(f,
684 "%sControl PID: %lu\n",
685 prefix, (unsigned long) m->control_pid);
686
687 exec_context_dump(&m->exec_context, f, prefix);
688 }
689
690 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
691 pid_t pid;
692 int r;
693
694 assert(m);
695 assert(c);
696 assert(_pid);
697
698 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
699 goto fail;
700
701 if ((r = exec_spawn(c,
702 NULL,
703 &m->exec_context,
704 NULL, 0,
705 m->meta.manager->environment,
706 true,
707 true,
708 true,
709 m->meta.manager->confirm_spawn,
710 m->meta.cgroup_bondings,
711 &pid)) < 0)
712 goto fail;
713
714 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
715 /* FIXME: we need to do something here */
716 goto fail;
717
718 *_pid = pid;
719
720 return 0;
721
722 fail:
723 unit_unwatch_timer(UNIT(m), &m->timer_watch);
724
725 return r;
726 }
727
728 static void mount_enter_dead(Mount *m, bool success) {
729 assert(m);
730
731 if (!success)
732 m->failure = true;
733
734 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
735 }
736
737 static void mount_enter_mounted(Mount *m, bool success) {
738 assert(m);
739
740 if (!success)
741 m->failure = true;
742
743 mount_set_state(m, MOUNT_MOUNTED);
744 }
745
746 static void mount_enter_signal(Mount *m, MountState state, bool success) {
747 int r;
748 Set *pid_set = NULL;
749 bool wait_for_exit = false;
750
751 assert(m);
752
753 if (!success)
754 m->failure = true;
755
756 if (m->exec_context.kill_mode != KILL_NONE) {
757 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
758 state == MOUNT_UNMOUNTING_SIGTERM ||
759 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
760
761 if (m->control_pid > 0) {
762 if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
763
764 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
765 else
766 wait_for_exit = true;
767 }
768
769 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
770
771 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
772 r = -ENOMEM;
773 goto fail;
774 }
775
776 /* Exclude the control pid from being killed via the cgroup */
777 if (m->control_pid > 0)
778 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
779 goto fail;
780
781 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
782 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
783 log_warning("Failed to kill control group: %s", strerror(-r));
784 } else if (r > 0)
785 wait_for_exit = true;
786
787 set_free(pid_set);
788 pid_set = NULL;
789 }
790 }
791
792 if (wait_for_exit) {
793 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
794 goto fail;
795
796 mount_set_state(m, state);
797 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
798 mount_enter_mounted(m, true);
799 else
800 mount_enter_dead(m, true);
801
802 return;
803
804 fail:
805 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
806
807 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
808 mount_enter_mounted(m, false);
809 else
810 mount_enter_dead(m, false);
811
812 if (pid_set)
813 set_free(pid_set);
814 }
815
816 static void mount_enter_unmounting(Mount *m, bool success) {
817 int r;
818
819 assert(m);
820
821 if (!success)
822 m->failure = true;
823
824 m->control_command_id = MOUNT_EXEC_UNMOUNT;
825 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
826
827 if ((r = exec_command_set(
828 m->control_command,
829 "/bin/umount",
830 m->where,
831 NULL)) < 0)
832 goto fail;
833
834 mount_unwatch_control_pid(m);
835
836 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
837 goto fail;
838
839 mount_set_state(m, MOUNT_UNMOUNTING);
840
841 return;
842
843 fail:
844 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
845 mount_enter_mounted(m, false);
846 }
847
848 static void mount_enter_mounting(Mount *m) {
849 int r;
850 MountParameters *p;
851
852 assert(m);
853
854 m->control_command_id = MOUNT_EXEC_MOUNT;
855 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
856
857 mkdir_p(m->where, m->directory_mode);
858
859 /* Create the source directory for bind-mounts if needed */
860 p = get_mount_parameters_configured(m);
861 if (p && mount_is_bind(p))
862 mkdir_p(p->what, m->directory_mode);
863
864 if (m->from_fragment)
865 r = exec_command_set(
866 m->control_command,
867 "/bin/mount",
868 m->parameters_fragment.what,
869 m->where,
870 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
871 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
872 NULL);
873 else if (m->from_etc_fstab)
874 r = exec_command_set(
875 m->control_command,
876 "/bin/mount",
877 m->where,
878 NULL);
879 else
880 r = -ENOENT;
881
882 if (r < 0)
883 goto fail;
884
885 mount_unwatch_control_pid(m);
886
887 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
888 goto fail;
889
890 mount_set_state(m, MOUNT_MOUNTING);
891
892 return;
893
894 fail:
895 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
896 mount_enter_dead(m, false);
897 }
898
899 static void mount_enter_mounting_done(Mount *m) {
900 assert(m);
901
902 mount_set_state(m, MOUNT_MOUNTING_DONE);
903 }
904
905 static void mount_enter_remounting(Mount *m, bool success) {
906 int r;
907
908 assert(m);
909
910 if (!success)
911 m->failure = true;
912
913 m->control_command_id = MOUNT_EXEC_REMOUNT;
914 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
915
916 if (m->from_fragment) {
917 char *buf = NULL;
918 const char *o;
919
920 if (m->parameters_fragment.options) {
921 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
922 r = -ENOMEM;
923 goto fail;
924 }
925
926 o = buf;
927 } else
928 o = "remount";
929
930 r = exec_command_set(
931 m->control_command,
932 "/bin/mount",
933 m->parameters_fragment.what,
934 m->where,
935 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
936 "-o", o,
937 NULL);
938
939 free(buf);
940 } else if (m->from_etc_fstab)
941 r = exec_command_set(
942 m->control_command,
943 "/bin/mount",
944 m->where,
945 "-o", "remount",
946 NULL);
947 else
948 r = -ENOENT;
949
950 if (r < 0)
951 goto fail;
952
953 mount_unwatch_control_pid(m);
954
955 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
956 goto fail;
957
958 mount_set_state(m, MOUNT_REMOUNTING);
959
960 return;
961
962 fail:
963 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
964 m->reload_failure = true;
965 mount_enter_mounted(m, true);
966 }
967
968 static int mount_start(Unit *u) {
969 Mount *m = MOUNT(u);
970
971 assert(m);
972
973 /* We cannot fulfill this request right now, try again later
974 * please! */
975 if (m->state == MOUNT_UNMOUNTING ||
976 m->state == MOUNT_UNMOUNTING_SIGTERM ||
977 m->state == MOUNT_UNMOUNTING_SIGKILL ||
978 m->state == MOUNT_MOUNTING_SIGTERM ||
979 m->state == MOUNT_MOUNTING_SIGKILL)
980 return -EAGAIN;
981
982 /* Already on it! */
983 if (m->state == MOUNT_MOUNTING)
984 return 0;
985
986 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
987
988 m->failure = false;
989 mount_enter_mounting(m);
990 return 0;
991 }
992
993 static int mount_stop(Unit *u) {
994 Mount *m = MOUNT(u);
995
996 assert(m);
997
998 /* Already on it */
999 if (m->state == MOUNT_UNMOUNTING ||
1000 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1001 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1002 m->state == MOUNT_MOUNTING_SIGTERM ||
1003 m->state == MOUNT_MOUNTING_SIGKILL)
1004 return 0;
1005
1006 assert(m->state == MOUNT_MOUNTING ||
1007 m->state == MOUNT_MOUNTING_DONE ||
1008 m->state == MOUNT_MOUNTED ||
1009 m->state == MOUNT_REMOUNTING ||
1010 m->state == MOUNT_REMOUNTING_SIGTERM ||
1011 m->state == MOUNT_REMOUNTING_SIGKILL);
1012
1013 mount_enter_unmounting(m, true);
1014 return 0;
1015 }
1016
1017 static int mount_reload(Unit *u) {
1018 Mount *m = MOUNT(u);
1019
1020 assert(m);
1021
1022 if (m->state == MOUNT_MOUNTING_DONE)
1023 return -EAGAIN;
1024
1025 assert(m->state == MOUNT_MOUNTED);
1026
1027 mount_enter_remounting(m, true);
1028 return 0;
1029 }
1030
1031 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1032 Mount *m = MOUNT(u);
1033
1034 assert(m);
1035 assert(f);
1036 assert(fds);
1037
1038 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1039 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1040
1041 if (m->control_pid > 0)
1042 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1043
1044 if (m->control_command_id >= 0)
1045 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1046
1047 return 0;
1048 }
1049
1050 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1051 Mount *m = MOUNT(u);
1052
1053 assert(u);
1054 assert(key);
1055 assert(value);
1056 assert(fds);
1057
1058 if (streq(key, "state")) {
1059 MountState state;
1060
1061 if ((state = mount_state_from_string(value)) < 0)
1062 log_debug("Failed to parse state value %s", value);
1063 else
1064 m->deserialized_state = state;
1065 } else if (streq(key, "failure")) {
1066 int b;
1067
1068 if ((b = parse_boolean(value)) < 0)
1069 log_debug("Failed to parse failure value %s", value);
1070 else
1071 m->failure = b || m->failure;
1072
1073 } else if (streq(key, "control-pid")) {
1074 pid_t pid;
1075
1076 if (parse_pid(value, &pid) < 0)
1077 log_debug("Failed to parse control-pid value %s", value);
1078 else
1079 m->control_pid = pid;
1080 } else if (streq(key, "control-command")) {
1081 MountExecCommand id;
1082
1083 if ((id = mount_exec_command_from_string(value)) < 0)
1084 log_debug("Failed to parse exec-command value %s", value);
1085 else {
1086 m->control_command_id = id;
1087 m->control_command = m->exec_command + id;
1088 }
1089
1090 } else
1091 log_debug("Unknown serialization key '%s'", key);
1092
1093 return 0;
1094 }
1095
1096 static UnitActiveState mount_active_state(Unit *u) {
1097 assert(u);
1098
1099 return state_translation_table[MOUNT(u)->state];
1100 }
1101
1102 static const char *mount_sub_state_to_string(Unit *u) {
1103 assert(u);
1104
1105 return mount_state_to_string(MOUNT(u)->state);
1106 }
1107
1108 static bool mount_check_gc(Unit *u) {
1109 Mount *m = MOUNT(u);
1110
1111 assert(m);
1112
1113 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1114 }
1115
1116 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1117 Mount *m = MOUNT(u);
1118 bool success;
1119
1120 assert(m);
1121 assert(pid >= 0);
1122
1123 if (pid != m->control_pid)
1124 return;
1125
1126 m->control_pid = 0;
1127
1128 success = is_clean_exit(code, status);
1129 m->failure = m->failure || !success;
1130
1131 if (m->control_command) {
1132 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1133 m->control_command = NULL;
1134 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1135 }
1136
1137 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1138 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1139
1140 /* Note that mount(8) returning and the kernel sending us a
1141 * mount table change event might happen out-of-order. If an
1142 * operation succeed we assume the kernel will follow soon too
1143 * and already change into the resulting state. If it fails
1144 * we check if the kernel still knows about the mount. and
1145 * change state accordingly. */
1146
1147 switch (m->state) {
1148
1149 case MOUNT_MOUNTING:
1150 case MOUNT_MOUNTING_DONE:
1151 case MOUNT_MOUNTING_SIGKILL:
1152 case MOUNT_MOUNTING_SIGTERM:
1153
1154 if (success)
1155 mount_enter_mounted(m, true);
1156 else if (m->from_proc_self_mountinfo)
1157 mount_enter_mounted(m, false);
1158 else
1159 mount_enter_dead(m, false);
1160 break;
1161
1162 case MOUNT_REMOUNTING:
1163 case MOUNT_REMOUNTING_SIGKILL:
1164 case MOUNT_REMOUNTING_SIGTERM:
1165
1166 m->reload_failure = !success;
1167 if (m->from_proc_self_mountinfo)
1168 mount_enter_mounted(m, true);
1169 else
1170 mount_enter_dead(m, true);
1171
1172 break;
1173
1174 case MOUNT_UNMOUNTING:
1175 case MOUNT_UNMOUNTING_SIGKILL:
1176 case MOUNT_UNMOUNTING_SIGTERM:
1177
1178 if (success)
1179 mount_enter_dead(m, true);
1180 else if (m->from_proc_self_mountinfo)
1181 mount_enter_mounted(m, false);
1182 else
1183 mount_enter_dead(m, false);
1184 break;
1185
1186 default:
1187 assert_not_reached("Uh, control process died at wrong time.");
1188 }
1189
1190 /* Notify clients about changed exit status */
1191 unit_add_to_dbus_queue(u);
1192 }
1193
1194 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1195 Mount *m = MOUNT(u);
1196
1197 assert(m);
1198 assert(elapsed == 1);
1199 assert(w == &m->timer_watch);
1200
1201 switch (m->state) {
1202
1203 case MOUNT_MOUNTING:
1204 case MOUNT_MOUNTING_DONE:
1205 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1206 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1207 break;
1208
1209 case MOUNT_REMOUNTING:
1210 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1211 m->reload_failure = true;
1212 mount_enter_mounted(m, true);
1213 break;
1214
1215 case MOUNT_UNMOUNTING:
1216 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1217 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1218 break;
1219
1220 case MOUNT_MOUNTING_SIGTERM:
1221 if (m->exec_context.send_sigkill) {
1222 log_warning("%s mounting timed out. Killing.", u->meta.id);
1223 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1224 } else {
1225 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1226
1227 if (m->from_proc_self_mountinfo)
1228 mount_enter_mounted(m, false);
1229 else
1230 mount_enter_dead(m, false);
1231 }
1232 break;
1233
1234 case MOUNT_REMOUNTING_SIGTERM:
1235 if (m->exec_context.send_sigkill) {
1236 log_warning("%s remounting timed out. Killing.", u->meta.id);
1237 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1238 } else {
1239 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1240
1241 if (m->from_proc_self_mountinfo)
1242 mount_enter_mounted(m, false);
1243 else
1244 mount_enter_dead(m, false);
1245 }
1246 break;
1247
1248 case MOUNT_UNMOUNTING_SIGTERM:
1249 if (m->exec_context.send_sigkill) {
1250 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1251 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1252 } else {
1253 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1254
1255 if (m->from_proc_self_mountinfo)
1256 mount_enter_mounted(m, false);
1257 else
1258 mount_enter_dead(m, false);
1259 }
1260 break;
1261
1262 case MOUNT_MOUNTING_SIGKILL:
1263 case MOUNT_REMOUNTING_SIGKILL:
1264 case MOUNT_UNMOUNTING_SIGKILL:
1265 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1266
1267 if (m->from_proc_self_mountinfo)
1268 mount_enter_mounted(m, false);
1269 else
1270 mount_enter_dead(m, false);
1271 break;
1272
1273 default:
1274 assert_not_reached("Timeout at wrong time.");
1275 }
1276 }
1277
1278 static int mount_add_one(
1279 Manager *m,
1280 const char *what,
1281 const char *where,
1282 const char *options,
1283 const char *fstype,
1284 int passno,
1285 bool from_proc_self_mountinfo,
1286 bool set_flags) {
1287 int r;
1288 Unit *u;
1289 bool delete;
1290 char *e, *w = NULL, *o = NULL, *f = NULL;
1291 MountParameters *p;
1292
1293 assert(m);
1294 assert(what);
1295 assert(where);
1296 assert(options);
1297 assert(fstype);
1298
1299 assert(!set_flags || from_proc_self_mountinfo);
1300
1301 /* Ignore API mount points. They should never be referenced in
1302 * dependencies ever. */
1303 if (mount_point_is_api(where))
1304 return 0;
1305 if (mount_point_ignore(where))
1306 return 0;
1307
1308 if (streq(fstype, "autofs"))
1309 return 0;
1310
1311 /* probably some kind of swap, ignore */
1312 if (!is_path(where))
1313 return 0;
1314
1315 if (!(e = unit_name_from_path(where, ".mount")))
1316 return -ENOMEM;
1317
1318 if (!(u = manager_get_unit(m, e))) {
1319 delete = true;
1320
1321 if (!(u = unit_new(m))) {
1322 free(e);
1323 return -ENOMEM;
1324 }
1325
1326 r = unit_add_name(u, e);
1327 free(e);
1328
1329 if (r < 0)
1330 goto fail;
1331
1332 if (!(MOUNT(u)->where = strdup(where))) {
1333 r = -ENOMEM;
1334 goto fail;
1335 }
1336
1337 unit_add_to_load_queue(u);
1338 } else {
1339 delete = false;
1340 free(e);
1341 }
1342
1343 if (!(w = strdup(what)) ||
1344 !(o = strdup(options)) ||
1345 !(f = strdup(fstype))) {
1346 r = -ENOMEM;
1347 goto fail;
1348 }
1349
1350 if (from_proc_self_mountinfo) {
1351 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1352
1353 if (set_flags) {
1354 MOUNT(u)->is_mounted = true;
1355 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1356 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1357 }
1358
1359 MOUNT(u)->from_proc_self_mountinfo = true;
1360 } else {
1361 p = &MOUNT(u)->parameters_etc_fstab;
1362 MOUNT(u)->from_etc_fstab = true;
1363 }
1364
1365 free(p->what);
1366 p->what = w;
1367
1368 free(p->options);
1369 p->options = o;
1370
1371 free(p->fstype);
1372 p->fstype = f;
1373
1374 p->passno = passno;
1375
1376 unit_add_to_dbus_queue(u);
1377
1378 return 0;
1379
1380 fail:
1381 free(w);
1382 free(o);
1383 free(f);
1384
1385 if (delete && u)
1386 unit_free(u);
1387
1388 return r;
1389 }
1390
1391 static int mount_find_pri(char *options) {
1392 char *end, *pri;
1393 unsigned long r;
1394
1395 if (!(pri = mount_test_option(options, "pri=")))
1396 return 0;
1397
1398 pri += 4;
1399
1400 errno = 0;
1401 r = strtoul(pri, &end, 10);
1402
1403 if (errno != 0)
1404 return -errno;
1405
1406 if (end == pri || (*end != ',' && *end != 0))
1407 return -EINVAL;
1408
1409 return (int) r;
1410 }
1411
1412 static int mount_load_etc_fstab(Manager *m) {
1413 FILE *f;
1414 int r = 0;
1415 struct mntent* me;
1416
1417 assert(m);
1418
1419 errno = 0;
1420 if (!(f = setmntent("/etc/fstab", "r")))
1421 return -errno;
1422
1423 while ((me = getmntent(f))) {
1424 char *where, *what;
1425 int k;
1426
1427 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1428 r = -ENOMEM;
1429 goto finish;
1430 }
1431
1432 if (!(where = strdup(me->mnt_dir))) {
1433 free(what);
1434 r = -ENOMEM;
1435 goto finish;
1436 }
1437
1438 if (what[0] == '/')
1439 path_kill_slashes(what);
1440
1441 if (where[0] == '/')
1442 path_kill_slashes(where);
1443
1444 if (streq(me->mnt_type, "swap")) {
1445 int pri;
1446
1447 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1448 k = pri;
1449 else
1450 k = swap_add_one(m,
1451 what,
1452 NULL,
1453 pri,
1454 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1455 !!mount_test_option(me->mnt_opts, "nofail"),
1456 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1457 false);
1458 } else
1459 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1460
1461 free(what);
1462 free(where);
1463
1464 if (r < 0)
1465 r = k;
1466 }
1467
1468 finish:
1469
1470 endmntent(f);
1471 return r;
1472 }
1473
1474 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1475 int r = 0;
1476 unsigned i;
1477 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1478
1479 assert(m);
1480
1481 rewind(m->proc_self_mountinfo);
1482
1483 for (i = 1;; i++) {
1484 int k;
1485
1486 device = path = options = options2 = fstype = d = p = o = NULL;
1487
1488 if ((k = fscanf(m->proc_self_mountinfo,
1489 "%*s " /* (1) mount id */
1490 "%*s " /* (2) parent id */
1491 "%*s " /* (3) major:minor */
1492 "%*s " /* (4) root */
1493 "%ms " /* (5) mount point */
1494 "%ms" /* (6) mount options */
1495 "%*[^-]" /* (7) optional fields */
1496 "- " /* (8) separator */
1497 "%ms " /* (9) file system type */
1498 "%ms" /* (10) mount source */
1499 "%ms" /* (11) mount options 2 */
1500 "%*[^\n]", /* some rubbish at the end */
1501 &path,
1502 &options,
1503 &fstype,
1504 &device,
1505 &options2)) != 5) {
1506
1507 if (k == EOF)
1508 break;
1509
1510 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1511 goto clean_up;
1512 }
1513
1514 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1515 r = -ENOMEM;
1516 goto finish;
1517 }
1518
1519 if (!(d = cunescape(device)) ||
1520 !(p = cunescape(path))) {
1521 r = -ENOMEM;
1522 goto finish;
1523 }
1524
1525 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1526 r = k;
1527
1528 clean_up:
1529 free(device);
1530 free(path);
1531 free(options);
1532 free(options2);
1533 free(fstype);
1534 free(d);
1535 free(p);
1536 free(o);
1537 }
1538
1539 finish:
1540 free(device);
1541 free(path);
1542 free(options);
1543 free(options2);
1544 free(fstype);
1545 free(d);
1546 free(p);
1547 free(o);
1548
1549 return r;
1550 }
1551
1552 static void mount_shutdown(Manager *m) {
1553 assert(m);
1554
1555 if (m->proc_self_mountinfo) {
1556 fclose(m->proc_self_mountinfo);
1557 m->proc_self_mountinfo = NULL;
1558 }
1559 }
1560
1561 static int mount_enumerate(Manager *m) {
1562 int r;
1563 struct epoll_event ev;
1564 assert(m);
1565
1566 if (!m->proc_self_mountinfo) {
1567 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1568 return -errno;
1569
1570 m->mount_watch.type = WATCH_MOUNT;
1571 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1572
1573 zero(ev);
1574 ev.events = EPOLLPRI;
1575 ev.data.ptr = &m->mount_watch;
1576
1577 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1578 return -errno;
1579 }
1580
1581 if ((r = mount_load_etc_fstab(m)) < 0)
1582 goto fail;
1583
1584 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1585 goto fail;
1586
1587 return 0;
1588
1589 fail:
1590 mount_shutdown(m);
1591 return r;
1592 }
1593
1594 void mount_fd_event(Manager *m, int events) {
1595 Meta *meta;
1596 int r;
1597
1598 assert(m);
1599 assert(events & EPOLLPRI);
1600
1601 /* The manager calls this for every fd event happening on the
1602 * /proc/self/mountinfo file, which informs us about mounting
1603 * table changes */
1604
1605 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1606 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1607
1608 /* Reset flags, just in case, for later calls */
1609 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1610 Mount *mount = (Mount*) meta;
1611
1612 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1613 }
1614
1615 return;
1616 }
1617
1618 manager_dispatch_load_queue(m);
1619
1620 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1621 Mount *mount = (Mount*) meta;
1622
1623 if (!mount->is_mounted) {
1624 /* This has just been unmounted. */
1625
1626 mount->from_proc_self_mountinfo = false;
1627
1628 switch (mount->state) {
1629
1630 case MOUNT_MOUNTED:
1631 mount_enter_dead(mount, true);
1632 break;
1633
1634 default:
1635 mount_set_state(mount, mount->state);
1636 break;
1637
1638 }
1639
1640 } else if (mount->just_mounted || mount->just_changed) {
1641
1642 /* New or changed mount entry */
1643
1644 switch (mount->state) {
1645
1646 case MOUNT_DEAD:
1647 case MOUNT_FAILED:
1648 mount_enter_mounted(mount, true);
1649 break;
1650
1651 case MOUNT_MOUNTING:
1652 mount_enter_mounting_done(mount);
1653 break;
1654
1655 default:
1656 /* Nothing really changed, but let's
1657 * issue an notification call
1658 * nonetheless, in case somebody is
1659 * waiting for this. (e.g. file system
1660 * ro/rw remounts.) */
1661 mount_set_state(mount, mount->state);
1662 break;
1663 }
1664 }
1665
1666 /* Reset the flags for later calls */
1667 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1668 }
1669 }
1670
1671 static void mount_reset_failed(Unit *u) {
1672 Mount *m = MOUNT(u);
1673
1674 assert(m);
1675
1676 if (m->state == MOUNT_FAILED)
1677 mount_set_state(m, MOUNT_DEAD);
1678
1679 m->failure = false;
1680 }
1681
1682 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1683 Mount *m = MOUNT(u);
1684 int r = 0;
1685 Set *pid_set = NULL;
1686
1687 assert(m);
1688
1689 if (who == KILL_MAIN) {
1690 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1691 return -EINVAL;
1692 }
1693
1694 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1695 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1696 return -ENOENT;
1697 }
1698
1699 if (m->control_pid > 0)
1700 if (kill(m->control_pid, signo) < 0)
1701 r = -errno;
1702
1703 if (mode == KILL_CONTROL_GROUP) {
1704 int q;
1705
1706 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1707 return -ENOMEM;
1708
1709 /* Exclude the control pid from being killed via the cgroup */
1710 if (m->control_pid > 0)
1711 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1712 r = q;
1713 goto finish;
1714 }
1715
1716 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1717 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1718 r = q;
1719 }
1720
1721 finish:
1722 if (pid_set)
1723 set_free(pid_set);
1724
1725 return r;
1726 }
1727
1728 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1729 [MOUNT_DEAD] = "dead",
1730 [MOUNT_MOUNTING] = "mounting",
1731 [MOUNT_MOUNTING_DONE] = "mounting-done",
1732 [MOUNT_MOUNTED] = "mounted",
1733 [MOUNT_REMOUNTING] = "remounting",
1734 [MOUNT_UNMOUNTING] = "unmounting",
1735 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1736 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1737 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1738 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1739 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1740 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1741 [MOUNT_FAILED] = "failed"
1742 };
1743
1744 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1745
1746 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1747 [MOUNT_EXEC_MOUNT] = "ExecMount",
1748 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1749 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1750 };
1751
1752 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1753
1754 const UnitVTable mount_vtable = {
1755 .suffix = ".mount",
1756
1757 .no_alias = true,
1758 .no_instances = true,
1759 .no_isolate = true,
1760 .show_status = true,
1761
1762 .init = mount_init,
1763 .load = mount_load,
1764 .done = mount_done,
1765
1766 .coldplug = mount_coldplug,
1767
1768 .dump = mount_dump,
1769
1770 .start = mount_start,
1771 .stop = mount_stop,
1772 .reload = mount_reload,
1773
1774 .kill = mount_kill,
1775
1776 .serialize = mount_serialize,
1777 .deserialize_item = mount_deserialize_item,
1778
1779 .active_state = mount_active_state,
1780 .sub_state_to_string = mount_sub_state_to_string,
1781
1782 .check_gc = mount_check_gc,
1783
1784 .sigchld_event = mount_sigchld_event,
1785 .timer_event = mount_timer_event,
1786
1787 .reset_failed = mount_reset_failed,
1788
1789 .bus_interface = "org.freedesktop.systemd1.Mount",
1790 .bus_message_handler = bus_mount_message_handler,
1791 .bus_invalidating_properties = bus_mount_invalidating_properties,
1792
1793 .enumerate = mount_enumerate,
1794 .shutdown = mount_shutdown
1795 };
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