]> git.ipfire.org Git - thirdparty/systemd.git/blob - src/mount.c
projects / thirdparty / systemd.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
mount: fix quota
[thirdparty/systemd.git] / src / mount.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3 /***
4 This file is part of systemd.
5
6 Copyright 2010 Lennart Poettering
7
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 ***/
21
22 #include <errno.h>
23 #include <stdio.h>
24 #include <mntent.h>
25 #include <sys/epoll.h>
26 #include <signal.h>
27
28 #include "unit.h"
29 #include "mount.h"
30 #include "load-fragment.h"
31 #include "load-dropin.h"
32 #include "log.h"
33 #include "strv.h"
34 #include "mount-setup.h"
35 #include "unit-name.h"
36 #include "dbus-mount.h"
37 #include "special.h"
38 #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
69 /* The stdio/kmsg bridge socket is on /, in order to avoid a
70 * dep loop, don't use kmsg logging for -.mount */
71 if (!unit_has_name(u, "-.mount")) {
72 m->exec_context.std_output = u->meta.manager->default_std_output;
73 m->exec_context.std_error = u->meta.manager->default_std_error;
74 }
75
76 /* We need to make sure that /bin/mount is always called in
77 * the same process group as us, so that the autofs kernel
78 * side doesn't send us another mount request while we are
79 * already trying to comply its last one. */
80 m->exec_context.same_pgrp = true;
81
82 m->timer_watch.type = WATCH_INVALID;
83
84 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
85
86 m->meta.ignore_on_isolate = true;
87 }
88
89 static void mount_unwatch_control_pid(Mount *m) {
90 assert(m);
91
92 if (m->control_pid <= 0)
93 return;
94
95 unit_unwatch_pid(UNIT(m), m->control_pid);
96 m->control_pid = 0;
97 }
98
99 static void mount_parameters_done(MountParameters *p) {
100 assert(p);
101
102 free(p->what);
103 free(p->options);
104 free(p->fstype);
105
106 p->what = p->options = p->fstype = NULL;
107 }
108
109 static void mount_done(Unit *u) {
110 Mount *m = MOUNT(u);
111
112 assert(m);
113
114 free(m->where);
115 m->where = NULL;
116
117 mount_parameters_done(&m->parameters_etc_fstab);
118 mount_parameters_done(&m->parameters_proc_self_mountinfo);
119 mount_parameters_done(&m->parameters_fragment);
120
121 exec_context_done(&m->exec_context);
122 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
123 m->control_command = NULL;
124
125 mount_unwatch_control_pid(m);
126
127 unit_unwatch_timer(u, &m->timer_watch);
128 }
129
130 static MountParameters* get_mount_parameters_configured(Mount *m) {
131 assert(m);
132
133 if (m->from_fragment)
134 return &m->parameters_fragment;
135 else if (m->from_etc_fstab)
136 return &m->parameters_etc_fstab;
137
138 return NULL;
139 }
140
141 static MountParameters* get_mount_parameters(Mount *m) {
142 assert(m);
143
144 if (m->from_proc_self_mountinfo)
145 return &m->parameters_proc_self_mountinfo;
146
147 return get_mount_parameters_configured(m);
148 }
149
150 static int mount_add_mount_links(Mount *m) {
151 Meta *other;
152 int r;
153 MountParameters *pm;
154
155 assert(m);
156
157 pm = get_mount_parameters_configured(m);
158
159 /* Adds in links to other mount points that might lie below or
160 * above us in the hierarchy */
161
162 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_MOUNT]) {
163 Mount *n = (Mount*) other;
164 MountParameters *pn;
165
166 if (n == m)
167 continue;
168
169 if (n->meta.load_state != UNIT_LOADED)
170 continue;
171
172 pn = get_mount_parameters_configured(n);
173
174 if (path_startswith(m->where, n->where)) {
175
176 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
177 return r;
178
179 if (pn)
180 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
181 return r;
182
183 } else if (path_startswith(n->where, m->where)) {
184
185 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
186 return r;
187
188 if (pm)
189 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
190 return r;
191
192 } else if (pm && path_startswith(pm->what, n->where)) {
193
194 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
195 return r;
196
197 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
198 return r;
199
200 } else if (pn && path_startswith(pn->what, m->where)) {
201
202 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
203 return r;
204
205 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
206 return r;
207 }
208 }
209
210 return 0;
211 }
212
213 static int mount_add_swap_links(Mount *m) {
214 Meta *other;
215 int r;
216
217 assert(m);
218
219 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_SWAP])
220 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
221 return r;
222
223 return 0;
224 }
225
226 static int mount_add_path_links(Mount *m) {
227 Meta *other;
228 int r;
229
230 assert(m);
231
232 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_PATH])
233 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
234 return r;
235
236 return 0;
237 }
238
239 static int mount_add_automount_links(Mount *m) {
240 Meta *other;
241 int r;
242
243 assert(m);
244
245 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_AUTOMOUNT])
246 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
247 return r;
248
249 return 0;
250 }
251
252 static int mount_add_socket_links(Mount *m) {
253 Meta *other;
254 int r;
255
256 assert(m);
257
258 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_SOCKET])
259 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
260 return r;
261
262 return 0;
263 }
264
265 static char* mount_test_option(const char *haystack, const char *needle) {
266 struct mntent me;
267
268 assert(needle);
269
270 /* Like glibc's hasmntopt(), but works on a string, not a
271 * struct mntent */
272
273 if (!haystack)
274 return false;
275
276 zero(me);
277 me.mnt_opts = (char*) haystack;
278
279 return hasmntopt(&me, needle);
280 }
281
282 static bool mount_is_network(MountParameters *p) {
283 assert(p);
284
285 if (mount_test_option(p->options, "_netdev"))
286 return true;
287
288 if (p->fstype && fstype_is_network(p->fstype))
289 return true;
290
291 return false;
292 }
293
294 static bool mount_is_bind(MountParameters *p) {
295 assert(p);
296
297 if (mount_test_option(p->options, "bind"))
298 return true;
299
300 if (p->fstype && streq(p->fstype, "bind"))
301 return true;
302
303 return false;
304 }
305
306 static bool needs_quota(MountParameters *p) {
307 assert(p);
308
309 if (mount_is_network(p))
310 return false;
311
312 if (mount_is_bind(p))
313 return false;
314
315 return mount_test_option(p->options, "usrquota") ||
316 mount_test_option(p->options, "grpquota") ||
317 mount_test_option(p->options, "quota") ||
318 mount_test_option(p->options, "usrjquota") ||
319 mount_test_option(p->options, "grpjquota");
320 }
321
322 static int mount_add_fstab_links(Mount *m) {
323 const char *target, *after = NULL, *after2 = NULL;
324 MountParameters *p;
325 Unit *tu;
326 int r;
327 bool noauto, nofail, handle, automount;
328
329 assert(m);
330
331 if (m->meta.manager->running_as != MANAGER_SYSTEM)
332 return 0;
333
334 if (!(p = get_mount_parameters_configured(m)))
335 return 0;
336
337 if (p != &m->parameters_etc_fstab)
338 return 0;
339
340 noauto = !!mount_test_option(p->options, "noauto");
341 nofail = !!mount_test_option(p->options, "nofail");
342 automount =
343 mount_test_option(p->options, "comment=systemd.automount") ||
344 mount_test_option(p->options, "x-systemd-automount");
345 handle =
346 automount ||
347 mount_test_option(p->options, "comment=systemd.mount") ||
348 mount_test_option(p->options, "x-systemd-mount") ||
349 m->meta.manager->mount_auto;
350
351 if (mount_is_network(p)) {
352 target = SPECIAL_REMOTE_FS_TARGET;
353 after = SPECIAL_REMOTE_FS_PRE_TARGET;
354 after2 = SPECIAL_NETWORK_TARGET;
355 } else {
356 target = SPECIAL_LOCAL_FS_TARGET;
357 after = SPECIAL_LOCAL_FS_PRE_TARGET;
358 }
359
360 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
361 return r;
362
363 if (after)
364 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
365 return r;
366
367 if (after2)
368 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after2, NULL, true)) < 0)
369 return r;
370
371 if (automount) {
372 Unit *am;
373
374 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
375 return r;
376
377 /* If auto is configured as well also pull in the
378 * mount right-away, but don't rely on it. */
379 if (!noauto) /* automount + auto */
380 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
381 return r;
382
383 /* Install automount unit */
384 if (!nofail) /* automount + fail */
385 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, UNIT(am), true);
386 else /* automount + nofail */
387 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
388
389 } else if (handle && !noauto) {
390
391 /* Automatically add mount points that aren't natively
392 * configured to local-fs.target */
393
394 if (!nofail) /* auto + fail */
395 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true);
396 else /* auto + nofail */
397 return unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true);
398 }
399
400 return 0;
401 }
402
403 static int mount_add_device_links(Mount *m) {
404 MountParameters *p;
405 int r;
406
407 assert(m);
408
409 if (!(p = get_mount_parameters_configured(m)))
410 return 0;
411
412 if (!p->what)
413 return 0;
414
415 if (!mount_is_bind(p) &&
416 !path_equal(m->where, "/") &&
417 p == &m->parameters_etc_fstab) {
418 bool nofail, noauto;
419
420 noauto = !!mount_test_option(p->options, "noauto");
421 nofail = !!mount_test_option(p->options, "nofail");
422
423 if ((r = unit_add_node_link(UNIT(m), p->what,
424 !noauto && nofail &&
425 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
426 return r;
427 }
428
429 if (p->passno > 0 &&
430 !mount_is_bind(p) &&
431 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
432 !path_equal(m->where, "/")) {
433 char *name;
434 Unit *fsck;
435 /* Let's add in the fsck service */
436
437 /* aka SPECIAL_FSCK_SERVICE */
438 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
439 return -ENOMEM;
440
441 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
442 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
443 free(name);
444 return r;
445 }
446
447 free(name);
448
449 SERVICE(fsck)->fsck_passno = p->passno;
450
451 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
452 return r;
453 }
454
455 return 0;
456 }
457
458 static int mount_add_default_dependencies(Mount *m) {
459 int r;
460 MountParameters *p;
461
462 assert(m);
463
464 if (m->meta.manager->running_as != MANAGER_SYSTEM)
465 return 0;
466
467 p = get_mount_parameters_configured(m);
468 if (p && needs_quota(p)) {
469 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
470 (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
471 return r;
472 }
473
474 if (!path_equal(m->where, "/"))
475 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
476 return r;
477
478 return 0;
479 }
480
481 static int mount_fix_timeouts(Mount *m) {
482 MountParameters *p;
483 const char *timeout = NULL;
484 Unit *other;
485 Iterator i;
486 usec_t u;
487 char *t;
488 int r;
489
490 assert(m);
491
492 if (!(p = get_mount_parameters_configured(m)))
493 return 0;
494
495 /* Allow configuration how long we wait for a device that
496 * backs a mount point to show up. This is useful to support
497 * endless device timeouts for devices that show up only after
498 * user input, like crypto devices. */
499
500 if ((timeout = mount_test_option(p->options, "comment=systemd.device-timeout")))
501 timeout += 31;
502 else if ((timeout = mount_test_option(p->options, "x-systemd-device-timeout")))
503 timeout += 25;
504 else
505 return 0;
506
507 t = strndup(timeout, strcspn(timeout, ",;" WHITESPACE));
508 if (!t)
509 return -ENOMEM;
510
511 r = parse_usec(t, &u);
512 free(t);
513
514 if (r < 0) {
515 log_warning("Failed to parse timeout for %s, ignoring: %s", m->where, timeout);
516 return r;
517 }
518
519 SET_FOREACH(other, m->meta.dependencies[UNIT_AFTER], i) {
520 if (other->meta.type != UNIT_DEVICE)
521 continue;
522
523 other->meta.job_timeout = u;
524 }
525
526 return 0;
527 }
528
529 static int mount_verify(Mount *m) {
530 bool b;
531 char *e;
532 assert(m);
533
534 if (m->meta.load_state != UNIT_LOADED)
535 return 0;
536
537 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
538 return -ENOENT;
539
540 if (!(e = unit_name_from_path(m->where, ".mount")))
541 return -ENOMEM;
542
543 b = unit_has_name(UNIT(m), e);
544 free(e);
545
546 if (!b) {
547 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
548 return -EINVAL;
549 }
550
551 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
552 log_error("Cannot create mount unit for API file system %s. Refusing.", m->where);
553 return -EINVAL;
554 }
555
556 if (m->meta.fragment_path && !m->parameters_fragment.what) {
557 log_error("%s's What setting is missing. Refusing.", m->meta.id);
558 return -EBADMSG;
559 }
560
561 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
562 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
563 return -EINVAL;
564 }
565
566 return 0;
567 }
568
569 static int mount_load(Unit *u) {
570 Mount *m = MOUNT(u);
571 int r;
572
573 assert(u);
574 assert(u->meta.load_state == UNIT_STUB);
575
576 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
577 return r;
578
579 /* This is a new unit? Then let's add in some extras */
580 if (u->meta.load_state == UNIT_LOADED) {
581 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
582 return r;
583
584 if (m->meta.fragment_path)
585 m->from_fragment = true;
586
587 if (!m->where)
588 if (!(m->where = unit_name_to_path(u->meta.id)))
589 return -ENOMEM;
590
591 path_kill_slashes(m->where);
592
593 if (!m->meta.description)
594 if ((r = unit_set_description(u, m->where)) < 0)
595 return r;
596
597 if ((r = mount_add_device_links(m)) < 0)
598 return r;
599
600 if ((r = mount_add_mount_links(m)) < 0)
601 return r;
602
603 if ((r = mount_add_socket_links(m)) < 0)
604 return r;
605
606 if ((r = mount_add_swap_links(m)) < 0)
607 return r;
608
609 if ((r = mount_add_path_links(m)) < 0)
610 return r;
611
612 if ((r = mount_add_automount_links(m)) < 0)
613 return r;
614
615 if ((r = mount_add_fstab_links(m)) < 0)
616 return r;
617
618 if (m->meta.default_dependencies)
619 if ((r = mount_add_default_dependencies(m)) < 0)
620 return r;
621
622 if ((r = unit_add_default_cgroups(u)) < 0)
623 return r;
624
625 mount_fix_timeouts(m);
626 }
627
628 return mount_verify(m);
629 }
630
631 static int mount_notify_automount(Mount *m, int status) {
632 Unit *p;
633 int r;
634 Iterator i;
635
636 assert(m);
637
638 SET_FOREACH(p, m->meta.dependencies[UNIT_TRIGGERED_BY], i)
639 if (p->meta.type == UNIT_AUTOMOUNT) {
640 r = automount_send_ready(AUTOMOUNT(p), status);
641 if (r < 0)
642 return r;
643 }
644
645 return 0;
646 }
647
648 static void mount_set_state(Mount *m, MountState state) {
649 MountState old_state;
650 assert(m);
651
652 old_state = m->state;
653 m->state = state;
654
655 if (state != MOUNT_MOUNTING &&
656 state != MOUNT_MOUNTING_DONE &&
657 state != MOUNT_REMOUNTING &&
658 state != MOUNT_UNMOUNTING &&
659 state != MOUNT_MOUNTING_SIGTERM &&
660 state != MOUNT_MOUNTING_SIGKILL &&
661 state != MOUNT_UNMOUNTING_SIGTERM &&
662 state != MOUNT_UNMOUNTING_SIGKILL &&
663 state != MOUNT_REMOUNTING_SIGTERM &&
664 state != MOUNT_REMOUNTING_SIGKILL) {
665 unit_unwatch_timer(UNIT(m), &m->timer_watch);
666 mount_unwatch_control_pid(m);
667 m->control_command = NULL;
668 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
669 }
670
671 if (state == MOUNT_MOUNTED ||
672 state == MOUNT_REMOUNTING)
673 mount_notify_automount(m, 0);
674 else if (state == MOUNT_DEAD ||
675 state == MOUNT_UNMOUNTING ||
676 state == MOUNT_MOUNTING_SIGTERM ||
677 state == MOUNT_MOUNTING_SIGKILL ||
678 state == MOUNT_REMOUNTING_SIGTERM ||
679 state == MOUNT_REMOUNTING_SIGKILL ||
680 state == MOUNT_UNMOUNTING_SIGTERM ||
681 state == MOUNT_UNMOUNTING_SIGKILL ||
682 state == MOUNT_FAILED)
683 mount_notify_automount(m, -ENODEV);
684
685 if (state != old_state)
686 log_debug("%s changed %s -> %s",
687 m->meta.id,
688 mount_state_to_string(old_state),
689 mount_state_to_string(state));
690
691 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
692 m->reload_failure = false;
693 }
694
695 static int mount_coldplug(Unit *u) {
696 Mount *m = MOUNT(u);
697 MountState new_state = MOUNT_DEAD;
698 int r;
699
700 assert(m);
701 assert(m->state == MOUNT_DEAD);
702
703 if (m->deserialized_state != m->state)
704 new_state = m->deserialized_state;
705 else if (m->from_proc_self_mountinfo)
706 new_state = MOUNT_MOUNTED;
707
708 if (new_state != m->state) {
709
710 if (new_state == MOUNT_MOUNTING ||
711 new_state == MOUNT_MOUNTING_DONE ||
712 new_state == MOUNT_REMOUNTING ||
713 new_state == MOUNT_UNMOUNTING ||
714 new_state == MOUNT_MOUNTING_SIGTERM ||
715 new_state == MOUNT_MOUNTING_SIGKILL ||
716 new_state == MOUNT_UNMOUNTING_SIGTERM ||
717 new_state == MOUNT_UNMOUNTING_SIGKILL ||
718 new_state == MOUNT_REMOUNTING_SIGTERM ||
719 new_state == MOUNT_REMOUNTING_SIGKILL) {
720
721 if (m->control_pid <= 0)
722 return -EBADMSG;
723
724 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
725 return r;
726
727 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
728 return r;
729 }
730
731 mount_set_state(m, new_state);
732 }
733
734 return 0;
735 }
736
737 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
738 Mount *m = MOUNT(u);
739 MountParameters *p;
740
741 assert(m);
742 assert(f);
743
744 p = get_mount_parameters(m);
745
746 fprintf(f,
747 "%sMount State: %s\n"
748 "%sWhere: %s\n"
749 "%sWhat: %s\n"
750 "%sFile System Type: %s\n"
751 "%sOptions: %s\n"
752 "%sFrom /etc/fstab: %s\n"
753 "%sFrom /proc/self/mountinfo: %s\n"
754 "%sFrom fragment: %s\n"
755 "%sDirectoryMode: %04o\n",
756 prefix, mount_state_to_string(m->state),
757 prefix, m->where,
758 prefix, strna(p->what),
759 prefix, strna(p->fstype),
760 prefix, strna(p->options),
761 prefix, yes_no(m->from_etc_fstab),
762 prefix, yes_no(m->from_proc_self_mountinfo),
763 prefix, yes_no(m->from_fragment),
764 prefix, m->directory_mode);
765
766 if (m->control_pid > 0)
767 fprintf(f,
768 "%sControl PID: %lu\n",
769 prefix, (unsigned long) m->control_pid);
770
771 exec_context_dump(&m->exec_context, f, prefix);
772 }
773
774 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
775 pid_t pid;
776 int r;
777
778 assert(m);
779 assert(c);
780 assert(_pid);
781
782 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
783 goto fail;
784
785 if ((r = exec_spawn(c,
786 NULL,
787 &m->exec_context,
788 NULL, 0,
789 m->meta.manager->environment,
790 true,
791 true,
792 true,
793 m->meta.manager->confirm_spawn,
794 m->meta.cgroup_bondings,
795 m->meta.cgroup_attributes,
796 &pid)) < 0)
797 goto fail;
798
799 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
800 /* FIXME: we need to do something here */
801 goto fail;
802
803 *_pid = pid;
804
805 return 0;
806
807 fail:
808 unit_unwatch_timer(UNIT(m), &m->timer_watch);
809
810 return r;
811 }
812
813 static void mount_enter_dead(Mount *m, bool success) {
814 assert(m);
815
816 if (!success)
817 m->failure = true;
818
819 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
820 }
821
822 static void mount_enter_mounted(Mount *m, bool success) {
823 assert(m);
824
825 if (!success)
826 m->failure = true;
827
828 mount_set_state(m, MOUNT_MOUNTED);
829 }
830
831 static void mount_enter_signal(Mount *m, MountState state, bool success) {
832 int r;
833 Set *pid_set = NULL;
834 bool wait_for_exit = false;
835
836 assert(m);
837
838 if (!success)
839 m->failure = true;
840
841 if (m->exec_context.kill_mode != KILL_NONE) {
842 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
843 state == MOUNT_UNMOUNTING_SIGTERM ||
844 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
845
846 if (m->control_pid > 0) {
847 if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
848
849 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
850 else
851 wait_for_exit = true;
852 }
853
854 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
855
856 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
857 r = -ENOMEM;
858 goto fail;
859 }
860
861 /* Exclude the control pid from being killed via the cgroup */
862 if (m->control_pid > 0)
863 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
864 goto fail;
865
866 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
867 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
868 log_warning("Failed to kill control group: %s", strerror(-r));
869 } else if (r > 0)
870 wait_for_exit = true;
871
872 set_free(pid_set);
873 pid_set = NULL;
874 }
875 }
876
877 if (wait_for_exit) {
878 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
879 goto fail;
880
881 mount_set_state(m, state);
882 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
883 mount_enter_mounted(m, true);
884 else
885 mount_enter_dead(m, true);
886
887 return;
888
889 fail:
890 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
891
892 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
893 mount_enter_mounted(m, false);
894 else
895 mount_enter_dead(m, false);
896
897 if (pid_set)
898 set_free(pid_set);
899 }
900
901 static void mount_enter_unmounting(Mount *m, bool success) {
902 int r;
903
904 assert(m);
905
906 if (!success)
907 m->failure = true;
908
909 m->control_command_id = MOUNT_EXEC_UNMOUNT;
910 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
911
912 if ((r = exec_command_set(
913 m->control_command,
914 "/bin/umount",
915 m->where,
916 NULL)) < 0)
917 goto fail;
918
919 mount_unwatch_control_pid(m);
920
921 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
922 goto fail;
923
924 mount_set_state(m, MOUNT_UNMOUNTING);
925
926 return;
927
928 fail:
929 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
930 mount_enter_mounted(m, false);
931 }
932
933 static void mount_enter_mounting(Mount *m) {
934 int r;
935 MountParameters *p;
936
937 assert(m);
938
939 m->control_command_id = MOUNT_EXEC_MOUNT;
940 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
941
942 mkdir_p(m->where, m->directory_mode);
943
944 /* Create the source directory for bind-mounts if needed */
945 p = get_mount_parameters_configured(m);
946 if (p && mount_is_bind(p))
947 mkdir_p(p->what, m->directory_mode);
948
949 if (m->from_fragment)
950 r = exec_command_set(
951 m->control_command,
952 "/bin/mount",
953 m->parameters_fragment.what,
954 m->where,
955 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
956 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
957 NULL);
958 else if (m->from_etc_fstab)
959 r = exec_command_set(
960 m->control_command,
961 "/bin/mount",
962 m->where,
963 NULL);
964 else
965 r = -ENOENT;
966
967 if (r < 0)
968 goto fail;
969
970 mount_unwatch_control_pid(m);
971
972 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
973 goto fail;
974
975 mount_set_state(m, MOUNT_MOUNTING);
976
977 return;
978
979 fail:
980 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
981 mount_enter_dead(m, false);
982 }
983
984 static void mount_enter_mounting_done(Mount *m) {
985 assert(m);
986
987 mount_set_state(m, MOUNT_MOUNTING_DONE);
988 }
989
990 static void mount_enter_remounting(Mount *m, bool success) {
991 int r;
992
993 assert(m);
994
995 if (!success)
996 m->failure = true;
997
998 m->control_command_id = MOUNT_EXEC_REMOUNT;
999 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
1000
1001 if (m->from_fragment) {
1002 char *buf = NULL;
1003 const char *o;
1004
1005 if (m->parameters_fragment.options) {
1006 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
1007 r = -ENOMEM;
1008 goto fail;
1009 }
1010
1011 o = buf;
1012 } else
1013 o = "remount";
1014
1015 r = exec_command_set(
1016 m->control_command,
1017 "/bin/mount",
1018 m->parameters_fragment.what,
1019 m->where,
1020 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
1021 "-o", o,
1022 NULL);
1023
1024 free(buf);
1025 } else if (m->from_etc_fstab)
1026 r = exec_command_set(
1027 m->control_command,
1028 "/bin/mount",
1029 m->where,
1030 "-o", "remount",
1031 NULL);
1032 else
1033 r = -ENOENT;
1034
1035 if (r < 0)
1036 goto fail;
1037
1038 mount_unwatch_control_pid(m);
1039
1040 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
1041 goto fail;
1042
1043 mount_set_state(m, MOUNT_REMOUNTING);
1044
1045 return;
1046
1047 fail:
1048 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
1049 m->reload_failure = true;
1050 mount_enter_mounted(m, true);
1051 }
1052
1053 static int mount_start(Unit *u) {
1054 Mount *m = MOUNT(u);
1055
1056 assert(m);
1057
1058 /* We cannot fulfill this request right now, try again later
1059 * please! */
1060 if (m->state == MOUNT_UNMOUNTING ||
1061 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1062 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1063 m->state == MOUNT_MOUNTING_SIGTERM ||
1064 m->state == MOUNT_MOUNTING_SIGKILL)
1065 return -EAGAIN;
1066
1067 /* Already on it! */
1068 if (m->state == MOUNT_MOUNTING)
1069 return 0;
1070
1071 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
1072
1073 m->failure = false;
1074 mount_enter_mounting(m);
1075 return 0;
1076 }
1077
1078 static int mount_stop(Unit *u) {
1079 Mount *m = MOUNT(u);
1080
1081 assert(m);
1082
1083 /* Already on it */
1084 if (m->state == MOUNT_UNMOUNTING ||
1085 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1086 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1087 m->state == MOUNT_MOUNTING_SIGTERM ||
1088 m->state == MOUNT_MOUNTING_SIGKILL)
1089 return 0;
1090
1091 assert(m->state == MOUNT_MOUNTING ||
1092 m->state == MOUNT_MOUNTING_DONE ||
1093 m->state == MOUNT_MOUNTED ||
1094 m->state == MOUNT_REMOUNTING ||
1095 m->state == MOUNT_REMOUNTING_SIGTERM ||
1096 m->state == MOUNT_REMOUNTING_SIGKILL);
1097
1098 mount_enter_unmounting(m, true);
1099 return 0;
1100 }
1101
1102 static int mount_reload(Unit *u) {
1103 Mount *m = MOUNT(u);
1104
1105 assert(m);
1106
1107 if (m->state == MOUNT_MOUNTING_DONE)
1108 return -EAGAIN;
1109
1110 assert(m->state == MOUNT_MOUNTED);
1111
1112 mount_enter_remounting(m, true);
1113 return 0;
1114 }
1115
1116 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1117 Mount *m = MOUNT(u);
1118
1119 assert(m);
1120 assert(f);
1121 assert(fds);
1122
1123 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1124 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1125
1126 if (m->control_pid > 0)
1127 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1128
1129 if (m->control_command_id >= 0)
1130 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1131
1132 return 0;
1133 }
1134
1135 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1136 Mount *m = MOUNT(u);
1137
1138 assert(u);
1139 assert(key);
1140 assert(value);
1141 assert(fds);
1142
1143 if (streq(key, "state")) {
1144 MountState state;
1145
1146 if ((state = mount_state_from_string(value)) < 0)
1147 log_debug("Failed to parse state value %s", value);
1148 else
1149 m->deserialized_state = state;
1150 } else if (streq(key, "failure")) {
1151 int b;
1152
1153 if ((b = parse_boolean(value)) < 0)
1154 log_debug("Failed to parse failure value %s", value);
1155 else
1156 m->failure = b || m->failure;
1157
1158 } else if (streq(key, "control-pid")) {
1159 pid_t pid;
1160
1161 if (parse_pid(value, &pid) < 0)
1162 log_debug("Failed to parse control-pid value %s", value);
1163 else
1164 m->control_pid = pid;
1165 } else if (streq(key, "control-command")) {
1166 MountExecCommand id;
1167
1168 if ((id = mount_exec_command_from_string(value)) < 0)
1169 log_debug("Failed to parse exec-command value %s", value);
1170 else {
1171 m->control_command_id = id;
1172 m->control_command = m->exec_command + id;
1173 }
1174
1175 } else
1176 log_debug("Unknown serialization key '%s'", key);
1177
1178 return 0;
1179 }
1180
1181 static UnitActiveState mount_active_state(Unit *u) {
1182 assert(u);
1183
1184 return state_translation_table[MOUNT(u)->state];
1185 }
1186
1187 static const char *mount_sub_state_to_string(Unit *u) {
1188 assert(u);
1189
1190 return mount_state_to_string(MOUNT(u)->state);
1191 }
1192
1193 static bool mount_check_gc(Unit *u) {
1194 Mount *m = MOUNT(u);
1195
1196 assert(m);
1197
1198 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1199 }
1200
1201 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1202 Mount *m = MOUNT(u);
1203 bool success;
1204
1205 assert(m);
1206 assert(pid >= 0);
1207
1208 if (pid != m->control_pid)
1209 return;
1210
1211 m->control_pid = 0;
1212
1213 success = is_clean_exit(code, status);
1214 m->failure = m->failure || !success;
1215
1216 if (m->control_command) {
1217 exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status);
1218 m->control_command = NULL;
1219 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1220 }
1221
1222 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1223 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1224
1225 /* Note that mount(8) returning and the kernel sending us a
1226 * mount table change event might happen out-of-order. If an
1227 * operation succeed we assume the kernel will follow soon too
1228 * and already change into the resulting state. If it fails
1229 * we check if the kernel still knows about the mount. and
1230 * change state accordingly. */
1231
1232 switch (m->state) {
1233
1234 case MOUNT_MOUNTING:
1235 case MOUNT_MOUNTING_DONE:
1236 case MOUNT_MOUNTING_SIGKILL:
1237 case MOUNT_MOUNTING_SIGTERM:
1238
1239 if (success)
1240 mount_enter_mounted(m, true);
1241 else if (m->from_proc_self_mountinfo)
1242 mount_enter_mounted(m, false);
1243 else
1244 mount_enter_dead(m, false);
1245 break;
1246
1247 case MOUNT_REMOUNTING:
1248 case MOUNT_REMOUNTING_SIGKILL:
1249 case MOUNT_REMOUNTING_SIGTERM:
1250
1251 m->reload_failure = !success;
1252 if (m->from_proc_self_mountinfo)
1253 mount_enter_mounted(m, true);
1254 else
1255 mount_enter_dead(m, true);
1256
1257 break;
1258
1259 case MOUNT_UNMOUNTING:
1260 case MOUNT_UNMOUNTING_SIGKILL:
1261 case MOUNT_UNMOUNTING_SIGTERM:
1262
1263 if (success)
1264 mount_enter_dead(m, true);
1265 else if (m->from_proc_self_mountinfo)
1266 mount_enter_mounted(m, false);
1267 else
1268 mount_enter_dead(m, false);
1269 break;
1270
1271 default:
1272 assert_not_reached("Uh, control process died at wrong time.");
1273 }
1274
1275 /* Notify clients about changed exit status */
1276 unit_add_to_dbus_queue(u);
1277 }
1278
1279 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1280 Mount *m = MOUNT(u);
1281
1282 assert(m);
1283 assert(elapsed == 1);
1284 assert(w == &m->timer_watch);
1285
1286 switch (m->state) {
1287
1288 case MOUNT_MOUNTING:
1289 case MOUNT_MOUNTING_DONE:
1290 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1291 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1292 break;
1293
1294 case MOUNT_REMOUNTING:
1295 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1296 m->reload_failure = true;
1297 mount_enter_mounted(m, true);
1298 break;
1299
1300 case MOUNT_UNMOUNTING:
1301 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1302 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1303 break;
1304
1305 case MOUNT_MOUNTING_SIGTERM:
1306 if (m->exec_context.send_sigkill) {
1307 log_warning("%s mounting timed out. Killing.", u->meta.id);
1308 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1309 } else {
1310 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1311
1312 if (m->from_proc_self_mountinfo)
1313 mount_enter_mounted(m, false);
1314 else
1315 mount_enter_dead(m, false);
1316 }
1317 break;
1318
1319 case MOUNT_REMOUNTING_SIGTERM:
1320 if (m->exec_context.send_sigkill) {
1321 log_warning("%s remounting timed out. Killing.", u->meta.id);
1322 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1323 } else {
1324 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1325
1326 if (m->from_proc_self_mountinfo)
1327 mount_enter_mounted(m, false);
1328 else
1329 mount_enter_dead(m, false);
1330 }
1331 break;
1332
1333 case MOUNT_UNMOUNTING_SIGTERM:
1334 if (m->exec_context.send_sigkill) {
1335 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1336 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1337 } else {
1338 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1339
1340 if (m->from_proc_self_mountinfo)
1341 mount_enter_mounted(m, false);
1342 else
1343 mount_enter_dead(m, false);
1344 }
1345 break;
1346
1347 case MOUNT_MOUNTING_SIGKILL:
1348 case MOUNT_REMOUNTING_SIGKILL:
1349 case MOUNT_UNMOUNTING_SIGKILL:
1350 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1351
1352 if (m->from_proc_self_mountinfo)
1353 mount_enter_mounted(m, false);
1354 else
1355 mount_enter_dead(m, false);
1356 break;
1357
1358 default:
1359 assert_not_reached("Timeout at wrong time.");
1360 }
1361 }
1362
1363 static int mount_add_one(
1364 Manager *m,
1365 const char *what,
1366 const char *where,
1367 const char *options,
1368 const char *fstype,
1369 int passno,
1370 bool from_proc_self_mountinfo,
1371 bool set_flags) {
1372 int r;
1373 Unit *u;
1374 bool delete;
1375 char *e, *w = NULL, *o = NULL, *f = NULL;
1376 MountParameters *p;
1377
1378 assert(m);
1379 assert(what);
1380 assert(where);
1381 assert(options);
1382 assert(fstype);
1383
1384 assert(!set_flags || from_proc_self_mountinfo);
1385
1386 /* Ignore API mount points. They should never be referenced in
1387 * dependencies ever. */
1388 if (mount_point_is_api(where) || mount_point_ignore(where))
1389 return 0;
1390
1391 if (streq(fstype, "autofs"))
1392 return 0;
1393
1394 /* probably some kind of swap, ignore */
1395 if (!is_path(where))
1396 return 0;
1397
1398 if (!(e = unit_name_from_path(where, ".mount")))
1399 return -ENOMEM;
1400
1401 if (!(u = manager_get_unit(m, e))) {
1402 delete = true;
1403
1404 if (!(u = unit_new(m))) {
1405 free(e);
1406 return -ENOMEM;
1407 }
1408
1409 r = unit_add_name(u, e);
1410 free(e);
1411
1412 if (r < 0)
1413 goto fail;
1414
1415 if (!(MOUNT(u)->where = strdup(where))) {
1416 r = -ENOMEM;
1417 goto fail;
1418 }
1419
1420 unit_add_to_load_queue(u);
1421 } else {
1422 delete = false;
1423 free(e);
1424 }
1425
1426 if (!(w = strdup(what)) ||
1427 !(o = strdup(options)) ||
1428 !(f = strdup(fstype))) {
1429 r = -ENOMEM;
1430 goto fail;
1431 }
1432
1433 if (from_proc_self_mountinfo) {
1434 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1435
1436 if (set_flags) {
1437 MOUNT(u)->is_mounted = true;
1438 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1439 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1440 }
1441
1442 MOUNT(u)->from_proc_self_mountinfo = true;
1443 } else {
1444 p = &MOUNT(u)->parameters_etc_fstab;
1445 MOUNT(u)->from_etc_fstab = true;
1446 }
1447
1448 free(p->what);
1449 p->what = w;
1450
1451 free(p->options);
1452 p->options = o;
1453
1454 free(p->fstype);
1455 p->fstype = f;
1456
1457 p->passno = passno;
1458
1459 unit_add_to_dbus_queue(u);
1460
1461 return 0;
1462
1463 fail:
1464 free(w);
1465 free(o);
1466 free(f);
1467
1468 if (delete && u)
1469 unit_free(u);
1470
1471 return r;
1472 }
1473
1474 static int mount_find_pri(char *options) {
1475 char *end, *pri;
1476 unsigned long r;
1477
1478 if (!(pri = mount_test_option(options, "pri")))
1479 return 0;
1480
1481 pri += 4;
1482
1483 errno = 0;
1484 r = strtoul(pri, &end, 10);
1485
1486 if (errno != 0)
1487 return -errno;
1488
1489 if (end == pri || (*end != ',' && *end != 0))
1490 return -EINVAL;
1491
1492 return (int) r;
1493 }
1494
1495 static int mount_load_etc_fstab(Manager *m) {
1496 FILE *f;
1497 int r = 0;
1498 struct mntent* me;
1499
1500 assert(m);
1501
1502 errno = 0;
1503 if (!(f = setmntent("/etc/fstab", "r")))
1504 return -errno;
1505
1506 while ((me = getmntent(f))) {
1507 char *where, *what;
1508 int k;
1509
1510 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1511 r = -ENOMEM;
1512 goto finish;
1513 }
1514
1515 if (!(where = strdup(me->mnt_dir))) {
1516 free(what);
1517 r = -ENOMEM;
1518 goto finish;
1519 }
1520
1521 if (what[0] == '/')
1522 path_kill_slashes(what);
1523
1524 if (where[0] == '/')
1525 path_kill_slashes(where);
1526
1527 if (streq(me->mnt_type, "swap")) {
1528 int pri;
1529
1530 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1531 k = pri;
1532 else
1533 k = swap_add_one(m,
1534 what,
1535 NULL,
1536 pri,
1537 !!mount_test_option(me->mnt_opts, "noauto"),
1538 !!mount_test_option(me->mnt_opts, "nofail"),
1539 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1540 false);
1541 } else
1542 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1543
1544 free(what);
1545 free(where);
1546
1547 if (r < 0)
1548 r = k;
1549 }
1550
1551 finish:
1552
1553 endmntent(f);
1554 return r;
1555 }
1556
1557 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1558 int r = 0;
1559 unsigned i;
1560 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1561
1562 assert(m);
1563
1564 rewind(m->proc_self_mountinfo);
1565
1566 for (i = 1;; i++) {
1567 int k;
1568
1569 device = path = options = options2 = fstype = d = p = o = NULL;
1570
1571 if ((k = fscanf(m->proc_self_mountinfo,
1572 "%*s " /* (1) mount id */
1573 "%*s " /* (2) parent id */
1574 "%*s " /* (3) major:minor */
1575 "%*s " /* (4) root */
1576 "%ms " /* (5) mount point */
1577 "%ms" /* (6) mount options */
1578 "%*[^-]" /* (7) optional fields */
1579 "- " /* (8) separator */
1580 "%ms " /* (9) file system type */
1581 "%ms" /* (10) mount source */
1582 "%ms" /* (11) mount options 2 */
1583 "%*[^\n]", /* some rubbish at the end */
1584 &path,
1585 &options,
1586 &fstype,
1587 &device,
1588 &options2)) != 5) {
1589
1590 if (k == EOF)
1591 break;
1592
1593 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1594 goto clean_up;
1595 }
1596
1597 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1598 r = -ENOMEM;
1599 goto finish;
1600 }
1601
1602 if (!(d = cunescape(device)) ||
1603 !(p = cunescape(path))) {
1604 r = -ENOMEM;
1605 goto finish;
1606 }
1607
1608 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1609 r = k;
1610
1611 clean_up:
1612 free(device);
1613 free(path);
1614 free(options);
1615 free(options2);
1616 free(fstype);
1617 free(d);
1618 free(p);
1619 free(o);
1620 }
1621
1622 finish:
1623 free(device);
1624 free(path);
1625 free(options);
1626 free(options2);
1627 free(fstype);
1628 free(d);
1629 free(p);
1630 free(o);
1631
1632 return r;
1633 }
1634
1635 static void mount_shutdown(Manager *m) {
1636 assert(m);
1637
1638 if (m->proc_self_mountinfo) {
1639 fclose(m->proc_self_mountinfo);
1640 m->proc_self_mountinfo = NULL;
1641 }
1642 }
1643
1644 static int mount_enumerate(Manager *m) {
1645 int r;
1646 struct epoll_event ev;
1647 assert(m);
1648
1649 if (!m->proc_self_mountinfo) {
1650 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1651 return -errno;
1652
1653 m->mount_watch.type = WATCH_MOUNT;
1654 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1655
1656 zero(ev);
1657 ev.events = EPOLLPRI;
1658 ev.data.ptr = &m->mount_watch;
1659
1660 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1661 return -errno;
1662 }
1663
1664 if ((r = mount_load_etc_fstab(m)) < 0)
1665 goto fail;
1666
1667 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1668 goto fail;
1669
1670 return 0;
1671
1672 fail:
1673 mount_shutdown(m);
1674 return r;
1675 }
1676
1677 void mount_fd_event(Manager *m, int events) {
1678 Meta *meta;
1679 int r;
1680
1681 assert(m);
1682 assert(events & EPOLLPRI);
1683
1684 /* The manager calls this for every fd event happening on the
1685 * /proc/self/mountinfo file, which informs us about mounting
1686 * table changes */
1687
1688 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1689 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1690
1691 /* Reset flags, just in case, for later calls */
1692 LIST_FOREACH(units_by_type, meta, m->units_by_type[UNIT_MOUNT]) {
1693 Mount *mount = (Mount*) meta;
1694
1695 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1696 }
1697
1698 return;
1699 }
1700
1701 manager_dispatch_load_queue(m);
1702
1703 LIST_FOREACH(units_by_type, meta, m->units_by_type[UNIT_MOUNT]) {
1704 Mount *mount = (Mount*) meta;
1705
1706 if (!mount->is_mounted) {
1707 /* This has just been unmounted. */
1708
1709 mount->from_proc_self_mountinfo = false;
1710
1711 switch (mount->state) {
1712
1713 case MOUNT_MOUNTED:
1714 mount_enter_dead(mount, true);
1715 break;
1716
1717 default:
1718 mount_set_state(mount, mount->state);
1719 break;
1720
1721 }
1722
1723 } else if (mount->just_mounted || mount->just_changed) {
1724
1725 /* New or changed mount entry */
1726
1727 switch (mount->state) {
1728
1729 case MOUNT_DEAD:
1730 case MOUNT_FAILED:
1731 mount_enter_mounted(mount, true);
1732 break;
1733
1734 case MOUNT_MOUNTING:
1735 mount_enter_mounting_done(mount);
1736 break;
1737
1738 default:
1739 /* Nothing really changed, but let's
1740 * issue an notification call
1741 * nonetheless, in case somebody is
1742 * waiting for this. (e.g. file system
1743 * ro/rw remounts.) */
1744 mount_set_state(mount, mount->state);
1745 break;
1746 }
1747 }
1748
1749 /* Reset the flags for later calls */
1750 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1751 }
1752 }
1753
1754 static void mount_reset_failed(Unit *u) {
1755 Mount *m = MOUNT(u);
1756
1757 assert(m);
1758
1759 if (m->state == MOUNT_FAILED)
1760 mount_set_state(m, MOUNT_DEAD);
1761
1762 m->failure = false;
1763 }
1764
1765 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1766 Mount *m = MOUNT(u);
1767 int r = 0;
1768 Set *pid_set = NULL;
1769
1770 assert(m);
1771
1772 if (who == KILL_MAIN) {
1773 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1774 return -ESRCH;
1775 }
1776
1777 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1778 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1779 return -ESRCH;
1780 }
1781
1782 if (who == KILL_CONTROL || who == KILL_ALL)
1783 if (m->control_pid > 0)
1784 if (kill(m->control_pid, signo) < 0)
1785 r = -errno;
1786
1787 if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
1788 int q;
1789
1790 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1791 return -ENOMEM;
1792
1793 /* Exclude the control pid from being killed via the cgroup */
1794 if (m->control_pid > 0)
1795 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1796 r = q;
1797 goto finish;
1798 }
1799
1800 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1801 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
1802 r = q;
1803 }
1804
1805 finish:
1806 if (pid_set)
1807 set_free(pid_set);
1808
1809 return r;
1810 }
1811
1812 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1813 [MOUNT_DEAD] = "dead",
1814 [MOUNT_MOUNTING] = "mounting",
1815 [MOUNT_MOUNTING_DONE] = "mounting-done",
1816 [MOUNT_MOUNTED] = "mounted",
1817 [MOUNT_REMOUNTING] = "remounting",
1818 [MOUNT_UNMOUNTING] = "unmounting",
1819 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1820 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1821 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1822 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1823 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1824 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1825 [MOUNT_FAILED] = "failed"
1826 };
1827
1828 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1829
1830 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1831 [MOUNT_EXEC_MOUNT] = "ExecMount",
1832 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1833 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1834 };
1835
1836 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1837
1838 const UnitVTable mount_vtable = {
1839 .suffix = ".mount",
1840 .sections =
1841 "Unit\0"
1842 "Mount\0"
1843 "Install\0",
1844
1845 .no_alias = true,
1846 .no_instances = true,
1847 .show_status = true,
1848
1849 .init = mount_init,
1850 .load = mount_load,
1851 .done = mount_done,
1852
1853 .coldplug = mount_coldplug,
1854
1855 .dump = mount_dump,
1856
1857 .start = mount_start,
1858 .stop = mount_stop,
1859 .reload = mount_reload,
1860
1861 .kill = mount_kill,
1862
1863 .serialize = mount_serialize,
1864 .deserialize_item = mount_deserialize_item,
1865
1866 .active_state = mount_active_state,
1867 .sub_state_to_string = mount_sub_state_to_string,
1868
1869 .check_gc = mount_check_gc,
1870
1871 .sigchld_event = mount_sigchld_event,
1872 .timer_event = mount_timer_event,
1873
1874 .reset_failed = mount_reset_failed,
1875
1876 .bus_interface = "org.freedesktop.systemd1.Mount",
1877 .bus_message_handler = bus_mount_message_handler,
1878 .bus_invalidating_properties = bus_mount_invalidating_properties,
1879
1880 .enumerate = mount_enumerate,
1881 .shutdown = mount_shutdown
1882 };
Unnamed repository; edit this file 'description' to name the repository.