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fsck: don't fsck against basic.target in order to properly allow automount /home
[thirdparty/systemd.git] / src / mount.c
CommitLineData
d6c9574f 1/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
5cb5a6ff 2
a7334b09
LP		 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
5cb5a6ff 22#include <errno.h>
b08d03ff
LP		 23#include <stdio.h>
24#include <mntent.h>
ef734fd6 25#include <sys/epoll.h>
e537352b 26#include <signal.h>
5cb5a6ff 27
87f0e418 28#include "unit.h"
5cb5a6ff
LP		 29#include "mount.h"
30#include "load-fragment.h"
5cb5a6ff 31#include "load-dropin.h"
b08d03ff 32#include "log.h"
e537352b
LP		 33#include "strv.h"
34#include "mount-setup.h"
9e2f7c11 35#include "unit-name.h"
4139c1b2 36#include "dbus-mount.h"
514f4ef5 37#include "special.h"
8a0867d6 38#include "bus-errors.h"
9a57c629 39#include "exit-status.h"
f6a6225e 40#include "def.h"
5cb5a6ff 41
f50e0a01
LP		 42static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
43 [MOUNT_DEAD] = UNIT_INACTIVE,
44 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
e537352b 45 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
f50e0a01 46 [MOUNT_MOUNTED] = UNIT_ACTIVE,
032ff4af 47 [MOUNT_REMOUNTING] = UNIT_RELOADING,
f50e0a01 48 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
e537352b
LP		 49 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
50 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
032ff4af
LP		 51 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
52 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
e537352b
LP		 53 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
54 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
fdf20a31 55 [MOUNT_FAILED] = UNIT_FAILED
f50e0a01 56};
5cb5a6ff 57
a16e1123
LP		 58static void mount_init(Unit *u) {
59 Mount *m = MOUNT(u);
5cb5a6ff 60
a16e1123
LP		 61 assert(u);
62 assert(u->meta.load_state == UNIT_STUB);
63
64 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
3e5235b0
LP		 65 m->directory_mode = 0755;
66
c3686083 67 exec_context_init(&m->exec_context);
d893269d
LP		 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 = EXEC_OUTPUT_KMSG;
c3686083 73
a16e1123
LP		 74 /* We need to make sure that /bin/mount is always called in
75 * the same process group as us, so that the autofs kernel
76 * side doesn't send us another mount request while we are
77 * already trying to comply its last one. */
74922904 78 m->exec_context.same_pgrp = true;
8d567588 79
a16e1123
LP		 80 m->timer_watch.type = WATCH_INVALID;
81
82 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
c8f4d764
LP		 83
84 m->meta.ignore_on_isolate = true;
8d567588
LP		 85}
86
a16e1123 87static void mount_unwatch_control_pid(Mount *m) {
5e94833f
LP		 88 assert(m);
89
90 if (m->control_pid <= 0)
91 return;
92
93 unit_unwatch_pid(UNIT(m), m->control_pid);
94 m->control_pid = 0;
95}
96
e537352b
LP		 97static void mount_parameters_done(MountParameters *p) {
98 assert(p);
99
100 free(p->what);
101 free(p->options);
102 free(p->fstype);
103
104 p->what = p->options = p->fstype = NULL;
105}
106
87f0e418 107static void mount_done(Unit *u) {
ef734fd6 108 Mount *m = MOUNT(u);
e0fa621b 109 Meta *other;
034c6ed7 110
ef734fd6 111 assert(m);
034c6ed7 112
e537352b
LP		 113 free(m->where);
114 m->where = NULL;
f50e0a01 115
e0fa621b
LP		 116 /* Try to detach us from the automount unit if there is any */
117 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT]) {
118 Automount *a = (Automount*) other;
119
120 if (a->mount == m)
121 a->mount = NULL;
122 }
123
e537352b
LP		 124 mount_parameters_done(&m->parameters_etc_fstab);
125 mount_parameters_done(&m->parameters_proc_self_mountinfo);
126 mount_parameters_done(&m->parameters_fragment);
ef734fd6 127
e537352b
LP		 128 exec_context_done(&m->exec_context);
129 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
130 m->control_command = NULL;
f50e0a01 131
a16e1123 132 mount_unwatch_control_pid(m);
f50e0a01 133
e537352b 134 unit_unwatch_timer(u, &m->timer_watch);
f50e0a01
LP		 135}
136
cb39ed3f
LP		 137static MountParameters* get_mount_parameters_configured(Mount *m) {
138 assert(m);
139
140 if (m->from_fragment)
141 return &m->parameters_fragment;
142 else if (m->from_etc_fstab)
143 return &m->parameters_etc_fstab;
144
145 return NULL;
146}
147
148static MountParameters* get_mount_parameters(Mount *m) {
149 assert(m);
150
151 if (m->from_proc_self_mountinfo)
152 return &m->parameters_proc_self_mountinfo;
153
154 return get_mount_parameters_configured(m);
155}
156
6e2ef85b
LP		 157static int mount_add_mount_links(Mount *m) {
158 Meta *other;
b08d03ff 159 int r;
5c78d8e2 160 MountParameters *pm;
b08d03ff 161
6e2ef85b 162 assert(m);
b08d03ff 163
cb39ed3f 164 pm = get_mount_parameters_configured(m);
5c78d8e2 165
6e2ef85b
LP		 166 /* Adds in links to other mount points that might lie below or
167 * above us in the hierarchy */
e537352b 168
6e2ef85b
LP		 169 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
170 Mount *n = (Mount*) other;
5c78d8e2 171 MountParameters *pn;
07b0b134 172
6e2ef85b
LP		 173 if (n == m)
174 continue;
b08d03ff 175
6e2ef85b
LP		 176 if (n->meta.load_state != UNIT_LOADED)
177 continue;
b08d03ff 178
cb39ed3f 179 pn = get_mount_parameters_configured(n);
5c78d8e2 180
6e2ef85b 181 if (path_startswith(m->where, n->where)) {
b08d03ff 182
6e2ef85b
LP		 183 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
184 return r;
b08d03ff 185
cb39ed3f 186 if (pn)
6e2ef85b
LP		 187 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
188 return r;
b08d03ff 189
6e2ef85b 190 } else if (path_startswith(n->where, m->where)) {
b08d03ff 191
5c78d8e2
LP		 192 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
193 return r;
194
cb39ed3f 195 if (pm)
5c78d8e2
LP		 196 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
197 return r;
198
199 } else if (pm && path_startswith(pm->what, n->where)) {
200
201 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
6e2ef85b
LP		 202 return r;
203
cb39ed3f
LP		 204 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
205 return r;
5c78d8e2
LP		 206
207 } else if (pn && path_startswith(pn->what, m->where)) {
208
209 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
210 return r;
211
cb39ed3f
LP		 212 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
213 return r;
6e2ef85b
LP		 214 }
215 }
b08d03ff
LP		 216
217 return 0;
218}
219
6e2ef85b 220static int mount_add_swap_links(Mount *m) {
ef734fd6 221 Meta *other;
b08d03ff
LP		 222 int r;
223
6e2ef85b 224 assert(m);
b08d03ff 225
6e2ef85b
LP		 226 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
227 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
228 return r;
b08d03ff 229
6e2ef85b
LP		 230 return 0;
231}
b08d03ff 232
01f78473
LP		 233static int mount_add_path_links(Mount *m) {
234 Meta *other;
235 int r;
236
237 assert(m);
238
239 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
240 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
241 return r;
242
243 return 0;
244}
245
6e2ef85b
LP		 246static int mount_add_automount_links(Mount *m) {
247 Meta *other;
248 int r;
e537352b 249
6e2ef85b 250 assert(m);
b08d03ff 251
6e2ef85b
LP		 252 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
253 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
254 return r;
b08d03ff 255
6e2ef85b
LP		 256 return 0;
257}
b08d03ff 258
6e2ef85b
LP		 259static int mount_add_socket_links(Mount *m) {
260 Meta *other;
261 int r;
b08d03ff 262
6e2ef85b 263 assert(m);
b08d03ff 264
6e2ef85b
LP		 265 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
266 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
267 return r;
b08d03ff
LP		 268
269 return 0;
270}
271
07b0b134 272static char* mount_test_option(const char *haystack, const char *needle) {
e537352b
LP		 273 struct mntent me;
274
275 assert(needle);
276
277 /* Like glibc's hasmntopt(), but works on a string, not a
278 * struct mntent */
279
280 if (!haystack)
281 return false;
282
283 zero(me);
284 me.mnt_opts = (char*) haystack;
285
07b0b134 286 return hasmntopt(&me, needle);
e537352b
LP		 287}
288
cb39ed3f
LP		 289static bool mount_is_network(MountParameters *p) {
290 assert(p);
291
292 if (mount_test_option(p->options, "_netdev"))
293 return true;
294
295 if (p->fstype && fstype_is_network(p->fstype))
296 return true;
297
298 return false;
299}
300
301static bool mount_is_bind(MountParameters *p) {
302 assert(p);
303
304 if (mount_test_option(p->options, "bind"))
305 return true;
306
307 if (p->fstype && streq(p->fstype, "bind"))
308 return true;
309
310 return false;
311}
312
313static bool needs_quota(MountParameters *p) {
314 assert(p);
315
316 if (mount_is_network(p))
317 return false;
318
319 if (mount_is_bind(p))
320 return false;
321
322 return mount_test_option(p->options, "usrquota") ||
323 mount_test_option(p->options, "grpquota");
324}
325
e537352b 326static int mount_add_target_links(Mount *m) {
a55da3cd 327 const char *target, *after = NULL;
e537352b 328 MountParameters *p;
a16e1123 329 Unit *tu;
e537352b 330 int r;
d9143006 331 bool noauto, nofail, handle, automount;
e537352b
LP		 332
333 assert(m);
334
cb39ed3f 335 if (!(p = get_mount_parameters_configured(m)))
e537352b
LP		 336 return 0;
337
07b0b134 338 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
d9143006 339 nofail = !!mount_test_option(p->options, "nofail");
d4a7e06d
LP		 340 handle =
341 mount_test_option(p->options, "comment=systemd.mount") ||
342 mount_test_option(p->options, "x-systemd-mount") ||
d3689161 343 m->meta.manager->mount_auto;
d4a7e06d
LP		 344 automount =
345 mount_test_option(p->options, "comment=systemd.automount") ||
346 mount_test_option(p->options, "x-systemd-automount");
e537352b 347
cb39ed3f 348 if (mount_is_network(p)) {
e537352b 349 target = SPECIAL_REMOTE_FS_TARGET;
a55da3cd
LP		 350
351 if (m->meta.manager->running_as == MANAGER_SYSTEM)
352 after = SPECIAL_NETWORK_TARGET;
353 } else
e537352b
LP		 354 target = SPECIAL_LOCAL_FS_TARGET;
355
398ef8ba 356 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
e537352b
LP		 357 return r;
358
a55da3cd 359 if (after)
50483512 360 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
a55da3cd
LP		 361 return r;
362
a3d4e06d 363 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
a16e1123
LP		 364 Unit *am;
365
366 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
9fcc065a 367 return r;
e537352b 368
2c966c03 369 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
a16e1123
LP		 370 } else {
371
81bf310e
LP		 372 /* Automatically add mount points that aren't natively
373 * configured to local-fs.target */
374 if (!noauto &&
d9143006 375 !nofail &&
81bf310e 376 handle &&
510051fc
LP		 377 m->from_etc_fstab &&
378 m->meta.manager->running_as == MANAGER_SYSTEM)
379 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
380 return r;
a16e1123 381
701cc384 382 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
a16e1123 383 }
e537352b
LP		 384}
385
173a8d04
LP		 386static int mount_add_device_links(Mount *m) {
387 MountParameters *p;
9fff8a1f 388 int r;
173a8d04
LP		 389
390 assert(m);
391
cb39ed3f 392 if (!(p = get_mount_parameters_configured(m)))
173a8d04
LP		 393 return 0;
394
9fff8a1f 395 if (!p->what)
173a8d04 396 return 0;
5c78d8e2 397
9fff8a1f
LP		 398 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
399 bool nofail, noauto;
173a8d04 400
9fff8a1f
LP		 401 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
402 nofail = !!mount_test_option(p->options, "nofail");
403
404 if ((r = unit_add_node_link(UNIT(m), p->what,
405 !noauto && nofail &&
406 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
407 return r;
408 }
409
491ad5dc 410 if (p->passno > 0 &&
ff2e0f05 411 !mount_is_bind(p) &&
b65a25f2
LP		 412 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
413 !path_equal(m->where, "/")) {
9fff8a1f
LP		 414 char *name;
415 Unit *fsck;
416 /* Let's add in the fsck service */
173a8d04 417
a9e1f5ec 418 /* aka SPECIAL_FSCK_SERVICE */
9fff8a1f
LP		 419 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
420 return -ENOMEM;
421
422 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
423 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
424 free(name);
425 return r;
426 }
427
428 free(name);
429
430 SERVICE(fsck)->fsck_passno = p->passno;
431
0355825f 432 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
9fff8a1f
LP		 433 return r;
434 }
435
436 return 0;
173a8d04
LP		 437}
438
2edd4434
LP		 439static int mount_add_default_dependencies(Mount *m) {
440 int r;
441
442 assert(m);
443
75d287d3
LP		 444 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
445 !path_equal(m->where, "/")) {
0c380104 446 MountParameters *p;
2edd4434 447
cb39ed3f
LP		 448 p = get_mount_parameters_configured(m);
449
450 if (p && needs_quota(p)) {
0c380104
AB		 451 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
452 (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
453 return r;
cb39ed3f 454 }
2edd4434 455
ead8e478 456 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
75d287d3 457 return r;
2edd4434
LP		 458 }
459
460 return 0;
461}
462
f4c05147 463static int mount_fix_timeouts(Mount *m) {
8024c3a7
LP		 464 MountParameters *p;
465 const char *timeout = NULL;
466 Unit *other;
467 Iterator i;
468 usec_t u;
f4c05147
LP		 469 char *t;
470 int r;
8024c3a7
LP		 471
472 assert(m);
473
474 if (!(p = get_mount_parameters_configured(m)))
f4c05147 475 return 0;
8024c3a7
LP		 476
477 /* Allow configuration how long we wait for a device that
478 * backs a mount point to show up. This is useful to support
479 * endless device timeouts for devices that show up only after
480 * user input, like crypto devices. */
481
482 if ((timeout = mount_test_option(p->options, "comment=systemd.device-timeout")))
483 timeout += 31;
484 else if ((timeout = mount_test_option(p->options, "x-systemd-device-timeout")))
485 timeout += 25;
486 else
f4c05147
LP		 487 return 0;
488
489 t = strndup(timeout, strcspn(timeout, ",;" WHITESPACE));
490 if (!t)
491 return -ENOMEM;
8024c3a7 492
f4c05147
LP		 493 r = parse_usec(t, &u);
494 free(t);
495
496 if (r < 0) {
8024c3a7 497 log_warning("Failed to parse timeout for %s, ignoring: %s", m->where, timeout);
f4c05147 498 return r;
8024c3a7
LP		 499 }
500
501 SET_FOREACH(other, m->meta.dependencies[UNIT_AFTER], i) {
502 if (other->meta.type != UNIT_DEVICE)
503 continue;
504
505 other->meta.job_timeout = u;
506 }
f4c05147
LP		 507
508 return 0;
8024c3a7
LP		 509}
510
8d567588
LP		 511static int mount_verify(Mount *m) {
512 bool b;
513 char *e;
514 assert(m);
515
8cbef760 516 if (m->meta.load_state != UNIT_LOADED)
8d567588
LP		 517 return 0;
518
8cbef760
LP		 519 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
520 return -ENOENT;
521
a16e1123 522 if (!(e = unit_name_from_path(m->where, ".mount")))
8d567588
LP		 523 return -ENOMEM;
524
525 b = unit_has_name(UNIT(m), e);
526 free(e);
527
528 if (!b) {
4cd1fbcc 529 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
8d567588
LP		 530 return -EINVAL;
531 }
532
33ff02c9
LP		 533 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
534 log_error("Cannot create mount unit for API file system %s. Refusing.", m->where);
535 return -EINVAL;
536 }
537
4e85aff4 538 if (m->meta.fragment_path && !m->parameters_fragment.what) {
4cd1fbcc 539 log_error("%s's What setting is missing. Refusing.", m->meta.id);
4e85aff4
LP		 540 return -EBADMSG;
541 }
542
2e22afe9 543 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
4d0e5dbd
LP		 544 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
545 return -EINVAL;
546 }
547
8d567588
LP		 548 return 0;
549}
550
e537352b
LP		 551static int mount_load(Unit *u) {
552 Mount *m = MOUNT(u);
553 int r;
554
555 assert(u);
556 assert(u->meta.load_state == UNIT_STUB);
557
558 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
559 return r;
560
561 /* This is a new unit? Then let's add in some extras */
562 if (u->meta.load_state == UNIT_LOADED) {
27abbe82
LP		 563 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
564 return r;
565
4e85aff4
LP		 566 if (m->meta.fragment_path)
567 m->from_fragment = true;
e537352b 568
a16e1123
LP		 569 if (!m->where)
570 if (!(m->where = unit_name_to_path(u->meta.id)))
571 return -ENOMEM;
572
573 path_kill_slashes(m->where);
574
4e85aff4
LP		 575 if (!m->meta.description)
576 if ((r = unit_set_description(u, m->where)) < 0)
577 return r;
e537352b 578
173a8d04
LP		 579 if ((r = mount_add_device_links(m)) < 0)
580 return r;
6e2ef85b
LP		 581
582 if ((r = mount_add_mount_links(m)) < 0)
583 return r;
584
585 if ((r = mount_add_socket_links(m)) < 0)
586 return r;
587
588 if ((r = mount_add_swap_links(m)) < 0)
e537352b
LP		 589 return r;
590
01f78473
LP		 591 if ((r = mount_add_path_links(m)) < 0)
592 return r;
593
6e2ef85b 594 if ((r = mount_add_automount_links(m)) < 0)
e537352b
LP		 595 return r;
596
6e2ef85b 597 if ((r = mount_add_target_links(m)) < 0)
e537352b
LP		 598 return r;
599
d686d8a9 600 if ((r = unit_add_default_cgroups(u)) < 0)
e537352b 601 return r;
4e67ddd6 602
2edd4434
LP		 603 if (m->meta.default_dependencies)
604 if ((r = mount_add_default_dependencies(m)) < 0)
4e67ddd6 605 return r;
8024c3a7
LP		 606
607 mount_fix_timeouts(m);
e537352b
LP		 608 }
609
8d567588 610 return mount_verify(m);
e537352b
LP		 611}
612
a16e1123
LP		 613static int mount_notify_automount(Mount *m, int status) {
614 Unit *p;
615 int r;
616
617 assert(m);
618
619 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
620 return r == -ENOENT ? 0 : r;
621
622 return automount_send_ready(AUTOMOUNT(p), status);
623}
624
e537352b
LP		 625static void mount_set_state(Mount *m, MountState state) {
626 MountState old_state;
627 assert(m);
628
629 old_state = m->state;
630 m->state = state;
631
632 if (state != MOUNT_MOUNTING &&
633 state != MOUNT_MOUNTING_DONE &&
634 state != MOUNT_REMOUNTING &&
635 state != MOUNT_UNMOUNTING &&
636 state != MOUNT_MOUNTING_SIGTERM &&
637 state != MOUNT_MOUNTING_SIGKILL &&
638 state != MOUNT_UNMOUNTING_SIGTERM &&
639 state != MOUNT_UNMOUNTING_SIGKILL &&
640 state != MOUNT_REMOUNTING_SIGTERM &&
641 state != MOUNT_REMOUNTING_SIGKILL) {
642 unit_unwatch_timer(UNIT(m), &m->timer_watch);
a16e1123 643 mount_unwatch_control_pid(m);
e537352b 644 m->control_command = NULL;
a16e1123 645 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
e537352b
LP		 646 }
647
8d567588
LP		 648 if (state == MOUNT_MOUNTED ||
649 state == MOUNT_REMOUNTING)
650 mount_notify_automount(m, 0);
651 else if (state == MOUNT_DEAD ||
652 state == MOUNT_UNMOUNTING ||
653 state == MOUNT_MOUNTING_SIGTERM ||
654 state == MOUNT_MOUNTING_SIGKILL ||
655 state == MOUNT_REMOUNTING_SIGTERM ||
656 state == MOUNT_REMOUNTING_SIGKILL ||
657 state == MOUNT_UNMOUNTING_SIGTERM ||
658 state == MOUNT_UNMOUNTING_SIGKILL ||
fdf20a31 659 state == MOUNT_FAILED)
8d567588
LP		 660 mount_notify_automount(m, -ENODEV);
661
e537352b 662 if (state != old_state)
40d50879 663 log_debug("%s changed %s -> %s",
4cd1fbcc 664 m->meta.id,
a16e1123
LP		 665 mount_state_to_string(old_state),
666 mount_state_to_string(state));
e537352b 667
e2f3b44c
LP		 668 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
669 m->reload_failure = false;
e537352b
LP		 670}
671
672static int mount_coldplug(Unit *u) {
673 Mount *m = MOUNT(u);
a16e1123
LP		 674 MountState new_state = MOUNT_DEAD;
675 int r;
e537352b
LP		 676
677 assert(m);
678 assert(m->state == MOUNT_DEAD);
679
a16e1123
LP		 680 if (m->deserialized_state != m->state)
681 new_state = m->deserialized_state;
682 else if (m->from_proc_self_mountinfo)
683 new_state = MOUNT_MOUNTED;
e537352b 684
a16e1123 685 if (new_state != m->state) {
e537352b 686
a16e1123
LP		 687 if (new_state == MOUNT_MOUNTING ||
688 new_state == MOUNT_MOUNTING_DONE ||
689 new_state == MOUNT_REMOUNTING ||
690 new_state == MOUNT_UNMOUNTING ||
691 new_state == MOUNT_MOUNTING_SIGTERM ||
692 new_state == MOUNT_MOUNTING_SIGKILL ||
693 new_state == MOUNT_UNMOUNTING_SIGTERM ||
694 new_state == MOUNT_UNMOUNTING_SIGKILL ||
695 new_state == MOUNT_REMOUNTING_SIGTERM ||
696 new_state == MOUNT_REMOUNTING_SIGKILL) {
e537352b 697
a16e1123
LP		 698 if (m->control_pid <= 0)
699 return -EBADMSG;
e537352b 700
a16e1123
LP		 701 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
702 return r;
e537352b 703
a16e1123
LP		 704 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
705 return r;
706 }
e537352b 707
a16e1123
LP		 708 mount_set_state(m, new_state);
709 }
e537352b
LP		 710
711 return 0;
e537352b
LP		 712}
713
714static void mount_dump(Unit *u, FILE *f, const char *prefix) {
715 Mount *m = MOUNT(u);
716 MountParameters *p;
717
718 assert(m);
719 assert(f);
720
cb39ed3f 721 p = get_mount_parameters(m);
e537352b
LP		 722
723 fprintf(f,
724 "%sMount State: %s\n"
725 "%sWhere: %s\n"
726 "%sWhat: %s\n"
727 "%sFile System Type: %s\n"
728 "%sOptions: %s\n"
729 "%sFrom /etc/fstab: %s\n"
730 "%sFrom /proc/self/mountinfo: %s\n"
731 "%sFrom fragment: %s\n"
3e5235b0 732 "%sDirectoryMode: %04o\n",
a16e1123 733 prefix, mount_state_to_string(m->state),
e537352b
LP		 734 prefix, m->where,
735 prefix, strna(p->what),
736 prefix, strna(p->fstype),
737 prefix, strna(p->options),
738 prefix, yes_no(m->from_etc_fstab),
739 prefix, yes_no(m->from_proc_self_mountinfo),
740 prefix, yes_no(m->from_fragment),
3e5235b0 741 prefix, m->directory_mode);
e537352b
LP		 742
743 if (m->control_pid > 0)
744 fprintf(f,
bb00e604
LP		 745 "%sControl PID: %lu\n",
746 prefix, (unsigned long) m->control_pid);
e537352b
LP		 747
748 exec_context_dump(&m->exec_context, f, prefix);
749}
750
a16e1123
LP		 751static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
752 pid_t pid;
753 int r;
754
755 assert(m);
756 assert(c);
757 assert(_pid);
758
759 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
760 goto fail;
761
762 if ((r = exec_spawn(c,
763 NULL,
764 &m->exec_context,
765 NULL, 0,
1137a57c 766 m->meta.manager->environment,
a16e1123
LP		 767 true,
768 true,
1e3ad081 769 true,
c3686083 770 m->meta.manager->confirm_spawn,
4cd1fbcc 771 m->meta.cgroup_bondings,
a16e1123
LP		 772 &pid)) < 0)
773 goto fail;
774
775 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
776 /* FIXME: we need to do something here */
777 goto fail;
778
779 *_pid = pid;
780
781 return 0;
782
783fail:
784 unit_unwatch_timer(UNIT(m), &m->timer_watch);
785
786 return r;
787}
788
e537352b
LP		 789static void mount_enter_dead(Mount *m, bool success) {
790 assert(m);
791
792 if (!success)
793 m->failure = true;
794
fdf20a31 795 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
e537352b
LP		 796}
797
80876c20
LP		 798static void mount_enter_mounted(Mount *m, bool success) {
799 assert(m);
800
801 if (!success)
802 m->failure = true;
803
804 mount_set_state(m, MOUNT_MOUNTED);
805}
806
e537352b
LP		 807static void mount_enter_signal(Mount *m, MountState state, bool success) {
808 int r;
ca949c9d
LP		 809 Set *pid_set = NULL;
810 bool wait_for_exit = false;
e537352b
LP		 811
812 assert(m);
813
814 if (!success)
815 m->failure = true;
816
2e22afe9 817 if (m->exec_context.kill_mode != KILL_NONE) {
80876c20
LP		 818 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
819 state == MOUNT_UNMOUNTING_SIGTERM ||
2e22afe9 820 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
e537352b 821
ca949c9d 822 if (m->control_pid > 0) {
cd25cce9 823 if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
e537352b 824
ca949c9d
LP		 825 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
826 else
827 wait_for_exit = true;
e537352b
LP		 828 }
829
ca949c9d 830 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
2e22afe9 831
ca949c9d
LP		 832 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
833 r = -ENOMEM;
e537352b
LP		 834 goto fail;
835 }
ca949c9d
LP		 836
837 /* Exclude the control pid from being killed via the cgroup */
838 if (m->control_pid > 0)
839 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
840 goto fail;
841
430c18ed 842 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
ca949c9d
LP		 843 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
844 log_warning("Failed to kill control group: %s", strerror(-r));
845 } else if (r > 0)
846 wait_for_exit = true;
847
848 set_free(pid_set);
da19d5c1 849 pid_set = NULL;
ca949c9d 850 }
e537352b
LP		 851 }
852
ca949c9d 853 if (wait_for_exit) {
80876c20
LP		 854 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
855 goto fail;
e537352b 856
80876c20
LP		 857 mount_set_state(m, state);
858 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
859 mount_enter_mounted(m, true);
860 else
e537352b
LP		 861 mount_enter_dead(m, true);
862
863 return;
864
865fail:
4cd1fbcc 866 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
e537352b 867
80876c20
LP		 868 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
869 mount_enter_mounted(m, false);
870 else
871 mount_enter_dead(m, false);
ca949c9d
LP		 872
873 if (pid_set)
874 set_free(pid_set);
e537352b
LP		 875}
876
877static void mount_enter_unmounting(Mount *m, bool success) {
e537352b
LP		 878 int r;
879
880 assert(m);
881
882 if (!success)
883 m->failure = true;
884
a16e1123
LP		 885 m->control_command_id = MOUNT_EXEC_UNMOUNT;
886 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
e537352b
LP		 887
888 if ((r = exec_command_set(
a16e1123 889 m->control_command,
e537352b
LP		 890 "/bin/umount",
891 m->where,
892 NULL)) < 0)
893 goto fail;
894
a16e1123 895 mount_unwatch_control_pid(m);
5e94833f 896
a16e1123 897 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
e537352b
LP		 898 goto fail;
899
900 mount_set_state(m, MOUNT_UNMOUNTING);
901
902 return;
903
904fail:
4cd1fbcc 905 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
e537352b
LP		 906 mount_enter_mounted(m, false);
907}
908
8d567588 909static void mount_enter_mounting(Mount *m) {
e537352b 910 int r;
cb39ed3f 911 MountParameters *p;
e537352b
LP		 912
913 assert(m);
914
a16e1123
LP		 915 m->control_command_id = MOUNT_EXEC_MOUNT;
916 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
e537352b 917
3e5235b0
LP		 918 mkdir_p(m->where, m->directory_mode);
919
cb39ed3f
LP		 920 /* Create the source directory for bind-mounts if needed */
921 p = get_mount_parameters_configured(m);
922 if (p && mount_is_bind(p))
923 mkdir_p(p->what, m->directory_mode);
2b583ce6 924
e537352b
LP		 925 if (m->from_fragment)
926 r = exec_command_set(
a16e1123 927 m->control_command,
e537352b
LP		 928 "/bin/mount",
929 m->parameters_fragment.what,
930 m->where,
40b8a332 931 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
8d567588 932 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
e537352b
LP		 933 NULL);
934 else if (m->from_etc_fstab)
935 r = exec_command_set(
a16e1123 936 m->control_command,
e537352b
LP		 937 "/bin/mount",
938 m->where,
939 NULL);
940 else
941 r = -ENOENT;
942
943 if (r < 0)
944 goto fail;
945
a16e1123 946 mount_unwatch_control_pid(m);
5e94833f 947
a16e1123 948 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
e537352b
LP		 949 goto fail;
950
951 mount_set_state(m, MOUNT_MOUNTING);
952
953 return;
954
955fail:
4cd1fbcc 956 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
e537352b
LP		 957 mount_enter_dead(m, false);
958}
959
8d567588 960static void mount_enter_mounting_done(Mount *m) {
e537352b
LP		 961 assert(m);
962
e537352b
LP		 963 mount_set_state(m, MOUNT_MOUNTING_DONE);
964}
965
966static void mount_enter_remounting(Mount *m, bool success) {
e537352b
LP		 967 int r;
968
969 assert(m);
970
971 if (!success)
972 m->failure = true;
973
a16e1123
LP		 974 m->control_command_id = MOUNT_EXEC_REMOUNT;
975 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
e537352b
LP		 976
977 if (m->from_fragment) {
978 char *buf = NULL;
979 const char *o;
980
981 if (m->parameters_fragment.options) {
982 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
983 r = -ENOMEM;
984 goto fail;
985 }
986
987 o = buf;
988 } else
989 o = "remount";
990
991 r = exec_command_set(
a16e1123 992 m->control_command,
e537352b
LP		 993 "/bin/mount",
994 m->parameters_fragment.what,
995 m->where,
40b8a332 996 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
e537352b
LP		 997 "-o", o,
998 NULL);
999
1000 free(buf);
1001 } else if (m->from_etc_fstab)
1002 r = exec_command_set(
a16e1123 1003 m->control_command,
e537352b
LP		 1004 "/bin/mount",
1005 m->where,
1006 "-o", "remount",
1007 NULL);
1008 else
1009 r = -ENOENT;
1010
60b912f6 1011 if (r < 0)
e537352b 1012 goto fail;
e537352b 1013
a16e1123 1014 mount_unwatch_control_pid(m);
5e94833f 1015
a16e1123 1016 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
e537352b
LP		 1017 goto fail;
1018
1019 mount_set_state(m, MOUNT_REMOUNTING);
1020
1021 return;
1022
1023fail:
e364ad06 1024 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
e2f3b44c
LP		 1025 m->reload_failure = true;
1026 mount_enter_mounted(m, true);
e537352b
LP		 1027}
1028
1029static int mount_start(Unit *u) {
1030 Mount *m = MOUNT(u);
1031
1032 assert(m);
1033
1034 /* We cannot fulfill this request right now, try again later
1035 * please! */
1036 if (m->state == MOUNT_UNMOUNTING ||
1037 m->state == MOUNT_UNMOUNTING_SIGTERM ||
60b912f6
LP		 1038 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1039 m->state == MOUNT_MOUNTING_SIGTERM ||
1040 m->state == MOUNT_MOUNTING_SIGKILL)
e537352b
LP		 1041 return -EAGAIN;
1042
1043 /* Already on it! */
60b912f6 1044 if (m->state == MOUNT_MOUNTING)
e537352b
LP		 1045 return 0;
1046
fdf20a31 1047 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
e537352b
LP		 1048
1049 m->failure = false;
8d567588 1050 mount_enter_mounting(m);
e537352b
LP		 1051 return 0;
1052}
1053
1054static int mount_stop(Unit *u) {
1055 Mount *m = MOUNT(u);
1056
1057 assert(m);
1058
e537352b
LP		 1059 /* Already on it */
1060 if (m->state == MOUNT_UNMOUNTING ||
1061 m->state == MOUNT_UNMOUNTING_SIGKILL ||
60b912f6
LP		 1062 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1063 m->state == MOUNT_MOUNTING_SIGTERM ||
1064 m->state == MOUNT_MOUNTING_SIGKILL)
e537352b
LP		 1065 return 0;
1066
3f6c78dc
LP		 1067 assert(m->state == MOUNT_MOUNTING ||
1068 m->state == MOUNT_MOUNTING_DONE ||
1069 m->state == MOUNT_MOUNTED ||
3f6c78dc
LP		 1070 m->state == MOUNT_REMOUNTING ||
1071 m->state == MOUNT_REMOUNTING_SIGTERM ||
1072 m->state == MOUNT_REMOUNTING_SIGKILL);
e537352b
LP		 1073
1074 mount_enter_unmounting(m, true);
1075 return 0;
1076}
1077
1078static int mount_reload(Unit *u) {
1079 Mount *m = MOUNT(u);
1080
1081 assert(m);
1082
1083 if (m->state == MOUNT_MOUNTING_DONE)
1084 return -EAGAIN;
1085
1086 assert(m->state == MOUNT_MOUNTED);
1087
1088 mount_enter_remounting(m, true);
1089 return 0;
1090}
1091
a16e1123
LP		 1092static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1093 Mount *m = MOUNT(u);
1094
1095 assert(m);
1096 assert(f);
1097 assert(fds);
1098
1099 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1100 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1101
1102 if (m->control_pid > 0)
5925dd3c 1103 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
a16e1123
LP		 1104
1105 if (m->control_command_id >= 0)
1106 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1107
1108 return 0;
1109}
1110
1111static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1112 Mount *m = MOUNT(u);
a16e1123
LP		 1113
1114 assert(u);
1115 assert(key);
1116 assert(value);
1117 assert(fds);
1118
1119 if (streq(key, "state")) {
1120 MountState state;
1121
1122 if ((state = mount_state_from_string(value)) < 0)
1123 log_debug("Failed to parse state value %s", value);
1124 else
1125 m->deserialized_state = state;
1126 } else if (streq(key, "failure")) {
1127 int b;
1128
1129 if ((b = parse_boolean(value)) < 0)
1130 log_debug("Failed to parse failure value %s", value);
1131 else
1132 m->failure = b || m->failure;
1133
1134 } else if (streq(key, "control-pid")) {
5925dd3c 1135 pid_t pid;
a16e1123 1136
e364ad06 1137 if (parse_pid(value, &pid) < 0)
a16e1123
LP		 1138 log_debug("Failed to parse control-pid value %s", value);
1139 else
5925dd3c 1140 m->control_pid = pid;
a16e1123
LP		 1141 } else if (streq(key, "control-command")) {
1142 MountExecCommand id;
1143
1144 if ((id = mount_exec_command_from_string(value)) < 0)
1145 log_debug("Failed to parse exec-command value %s", value);
1146 else {
1147 m->control_command_id = id;
1148 m->control_command = m->exec_command + id;
1149 }
1150
1151 } else
1152 log_debug("Unknown serialization key '%s'", key);
1153
1154 return 0;
1155}
1156
e537352b
LP		 1157static UnitActiveState mount_active_state(Unit *u) {
1158 assert(u);
1159
1160 return state_translation_table[MOUNT(u)->state];
1161}
1162
10a94420
LP		 1163static const char *mount_sub_state_to_string(Unit *u) {
1164 assert(u);
1165
a16e1123 1166 return mount_state_to_string(MOUNT(u)->state);
10a94420
LP		 1167}
1168
701cc384
LP		 1169static bool mount_check_gc(Unit *u) {
1170 Mount *m = MOUNT(u);
1171
1172 assert(m);
1173
1174 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1175}
1176
e537352b
LP		 1177static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1178 Mount *m = MOUNT(u);
1179 bool success;
1180
1181 assert(m);
1182 assert(pid >= 0);
1183
8c47c732
LP		 1184 if (pid != m->control_pid)
1185 return;
e537352b 1186
e537352b
LP		 1187 m->control_pid = 0;
1188
8c47c732
LP		 1189 success = is_clean_exit(code, status);
1190 m->failure = m->failure || !success;
1191
a16e1123 1192 if (m->control_command) {
169c1bda 1193 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
a16e1123
LP		 1194 m->control_command = NULL;
1195 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1196 }
1197
92abbefb
LP		 1198 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1199 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
e537352b
LP		 1200
1201 /* Note that mount(8) returning and the kernel sending us a
1202 * mount table change event might happen out-of-order. If an
1203 * operation succeed we assume the kernel will follow soon too
1204 * and already change into the resulting state. If it fails
1205 * we check if the kernel still knows about the mount. and
1206 * change state accordingly. */
1207
1208 switch (m->state) {
1209
1210 case MOUNT_MOUNTING:
1211 case MOUNT_MOUNTING_DONE:
1212 case MOUNT_MOUNTING_SIGKILL:
1213 case MOUNT_MOUNTING_SIGTERM:
e537352b 1214
19b160fa 1215 if (success)
e537352b
LP		 1216 mount_enter_mounted(m, true);
1217 else if (m->from_proc_self_mountinfo)
1218 mount_enter_mounted(m, false);
1219 else
1220 mount_enter_dead(m, false);
1221 break;
1222
e2f3b44c
LP		 1223 case MOUNT_REMOUNTING:
1224 case MOUNT_REMOUNTING_SIGKILL:
1225 case MOUNT_REMOUNTING_SIGTERM:
1226
1227 m->reload_failure = !success;
1228 if (m->from_proc_self_mountinfo)
1229 mount_enter_mounted(m, true);
1230 else
1231 mount_enter_dead(m, true);
1232
1233 break;
1234
e537352b
LP		 1235 case MOUNT_UNMOUNTING:
1236 case MOUNT_UNMOUNTING_SIGKILL:
1237 case MOUNT_UNMOUNTING_SIGTERM:
1238
1239 if (success)
1240 mount_enter_dead(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 default:
1248 assert_not_reached("Uh, control process died at wrong time.");
1249 }
c4e2ceae
LP		 1250
1251 /* Notify clients about changed exit status */
1252 unit_add_to_dbus_queue(u);
e537352b
LP		 1253}
1254
1255static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1256 Mount *m = MOUNT(u);
1257
1258 assert(m);
1259 assert(elapsed == 1);
1260 assert(w == &m->timer_watch);
1261
1262 switch (m->state) {
1263
1264 case MOUNT_MOUNTING:
1265 case MOUNT_MOUNTING_DONE:
9e2f7c11 1266 log_warning("%s mounting timed out. Stopping.", u->meta.id);
e537352b
LP		 1267 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1268 break;
1269
1270 case MOUNT_REMOUNTING:
9e2f7c11 1271 log_warning("%s remounting timed out. Stopping.", u->meta.id);
e2f3b44c
LP		 1272 m->reload_failure = true;
1273 mount_enter_mounted(m, true);
e537352b
LP		 1274 break;
1275
1276 case MOUNT_UNMOUNTING:
9e2f7c11 1277 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
e537352b
LP		 1278 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1279 break;
1280
1281 case MOUNT_MOUNTING_SIGTERM:
ba035df2
LP		 1282 if (m->exec_context.send_sigkill) {
1283 log_warning("%s mounting timed out. Killing.", u->meta.id);
1284 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1285 } else {
1286 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1287
1288 if (m->from_proc_self_mountinfo)
1289 mount_enter_mounted(m, false);
1290 else
1291 mount_enter_dead(m, false);
1292 }
e537352b
LP		 1293 break;
1294
1295 case MOUNT_REMOUNTING_SIGTERM:
ba035df2
LP		 1296 if (m->exec_context.send_sigkill) {
1297 log_warning("%s remounting timed out. Killing.", u->meta.id);
1298 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1299 } else {
1300 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1301
1302 if (m->from_proc_self_mountinfo)
1303 mount_enter_mounted(m, false);
1304 else
1305 mount_enter_dead(m, false);
1306 }
e537352b
LP		 1307 break;
1308
1309 case MOUNT_UNMOUNTING_SIGTERM:
ba035df2
LP		 1310 if (m->exec_context.send_sigkill) {
1311 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1312 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1313 } else {
1314 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1315
1316 if (m->from_proc_self_mountinfo)
1317 mount_enter_mounted(m, false);
1318 else
1319 mount_enter_dead(m, false);
1320 }
e537352b
LP		 1321 break;
1322
1323 case MOUNT_MOUNTING_SIGKILL:
1324 case MOUNT_REMOUNTING_SIGKILL:
1325 case MOUNT_UNMOUNTING_SIGKILL:
9e2f7c11 1326 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
e537352b
LP		 1327
1328 if (m->from_proc_self_mountinfo)
1329 mount_enter_mounted(m, false);
1330 else
1331 mount_enter_dead(m, false);
1332 break;
1333
1334 default:
1335 assert_not_reached("Timeout at wrong time.");
1336 }
1337}
1338
1339static int mount_add_one(
1340 Manager *m,
1341 const char *what,
1342 const char *where,
1343 const char *options,
1344 const char *fstype,
9fff8a1f 1345 int passno,
e537352b
LP		 1346 bool from_proc_self_mountinfo,
1347 bool set_flags) {
b08d03ff
LP		 1348 int r;
1349 Unit *u;
1350 bool delete;
e537352b 1351 char *e, *w = NULL, *o = NULL, *f = NULL;
4e85aff4 1352 MountParameters *p;
b08d03ff 1353
f50e0a01 1354 assert(m);
b08d03ff
LP		 1355 assert(what);
1356 assert(where);
e537352b
LP		 1357 assert(options);
1358 assert(fstype);
1359
1360 assert(!set_flags || from_proc_self_mountinfo);
1361
1362 /* Ignore API mount points. They should never be referenced in
1363 * dependencies ever. */
33ff02c9 1364 if (mount_point_is_api(where) || mount_point_ignore(where))
57f2a956 1365 return 0;
b08d03ff 1366
8d567588
LP		 1367 if (streq(fstype, "autofs"))
1368 return 0;
1369
4e85aff4
LP		 1370 /* probably some kind of swap, ignore */
1371 if (!is_path(where))
b08d03ff
LP		 1372 return 0;
1373
a16e1123 1374 if (!(e = unit_name_from_path(where, ".mount")))
b08d03ff
LP		 1375 return -ENOMEM;
1376
1377 if (!(u = manager_get_unit(m, e))) {
1378 delete = true;
1379
1380 if (!(u = unit_new(m))) {
1381 free(e);
1382 return -ENOMEM;
1383 }
1384
1385 r = unit_add_name(u, e);
1386 free(e);
1387
1388 if (r < 0)
1389 goto fail;
1390
e537352b 1391 if (!(MOUNT(u)->where = strdup(where))) {
07b0b134
ML		 1392 r = -ENOMEM;
1393 goto fail;
1394 }
f50e0a01 1395
f94ea366 1396 unit_add_to_load_queue(u);
b08d03ff
LP		 1397 } else {
1398 delete = false;
1399 free(e);
1400 }
1401
e537352b
LP		 1402 if (!(w = strdup(what)) ||
1403 !(o = strdup(options)) ||
1404 !(f = strdup(fstype))) {
1405 r = -ENOMEM;
1406 goto fail;
1407 }
1408
1409 if (from_proc_self_mountinfo) {
4e85aff4 1410 p = &MOUNT(u)->parameters_proc_self_mountinfo;
e537352b
LP		 1411
1412 if (set_flags) {
1413 MOUNT(u)->is_mounted = true;
1414 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
4e85aff4 1415 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
e537352b 1416 }
ef734fd6 1417
f50e0a01 1418 MOUNT(u)->from_proc_self_mountinfo = true;
ef734fd6 1419 } else {
4e85aff4 1420 p = &MOUNT(u)->parameters_etc_fstab;
f50e0a01 1421 MOUNT(u)->from_etc_fstab = true;
ef734fd6 1422 }
f50e0a01 1423
4e85aff4
LP		 1424 free(p->what);
1425 p->what = w;
b08d03ff 1426
4e85aff4
LP		 1427 free(p->options);
1428 p->options = o;
e537352b 1429
4e85aff4
LP		 1430 free(p->fstype);
1431 p->fstype = f;
b08d03ff 1432
9fff8a1f
LP		 1433 p->passno = passno;
1434
c1e1601e
LP		 1435 unit_add_to_dbus_queue(u);
1436
b08d03ff
LP		 1437 return 0;
1438
1439fail:
e537352b
LP		 1440 free(w);
1441 free(o);
1442 free(f);
1443
b08d03ff
LP		 1444 if (delete && u)
1445 unit_free(u);
1446
4e85aff4 1447 return r;
b08d03ff
LP		 1448}
1449
07b0b134
ML		 1450static int mount_find_pri(char *options) {
1451 char *end, *pri;
1452 unsigned long r;
1453
1454 if (!(pri = mount_test_option(options, "pri=")))
1455 return 0;
1456
1457 pri += 4;
1458
1459 errno = 0;
1460 r = strtoul(pri, &end, 10);
1461
1462 if (errno != 0)
1463 return -errno;
1464
1465 if (end == pri || (*end != ',' && *end != 0))
1466 return -EINVAL;
1467
1468 return (int) r;
1469}
1470
e537352b 1471static int mount_load_etc_fstab(Manager *m) {
b08d03ff 1472 FILE *f;
60b912f6 1473 int r = 0;
b08d03ff
LP		 1474 struct mntent* me;
1475
1476 assert(m);
1477
1478 errno = 0;
1479 if (!(f = setmntent("/etc/fstab", "r")))
1480 return -errno;
1481
1482 while ((me = getmntent(f))) {
1483 char *where, *what;
60b912f6 1484 int k;
b08d03ff
LP		 1485
1486 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1487 r = -ENOMEM;
1488 goto finish;
1489 }
1490
1491 if (!(where = strdup(me->mnt_dir))) {
1492 free(what);
1493 r = -ENOMEM;
1494 goto finish;
1495 }
1496
1497 if (what[0] == '/')
1498 path_kill_slashes(what);
1499
1500 if (where[0] == '/')
1501 path_kill_slashes(where);
1502
07b0b134
ML		 1503 if (streq(me->mnt_type, "swap")) {
1504 int pri;
1505
1506 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
60b912f6 1507 k = pri;
07b0b134 1508 else
60b912f6 1509 k = swap_add_one(m,
07b0b134 1510 what,
60b912f6 1511 NULL,
07b0b134 1512 pri,
4e85aff4 1513 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
173a8d04 1514 !!mount_test_option(me->mnt_opts, "nofail"),
4e85aff4 1515 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
07b0b134
ML		 1516 false);
1517 } else
9fff8a1f 1518 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
07b0b134 1519
b08d03ff
LP		 1520 free(what);
1521 free(where);
1522
1523 if (r < 0)
60b912f6 1524 r = k;
b08d03ff
LP		 1525 }
1526
b08d03ff
LP		 1527finish:
1528
1529 endmntent(f);
1530 return r;
1531}
1532
ef734fd6 1533static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
60b912f6 1534 int r = 0;
1ddff895 1535 unsigned i;
a2e0f3d3 1536 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
b08d03ff
LP		 1537
1538 assert(m);
1539
ef734fd6 1540 rewind(m->proc_self_mountinfo);
b08d03ff 1541
1ddff895 1542 for (i = 1;; i++) {
b08d03ff 1543 int k;
e537352b 1544
a2e0f3d3 1545 device = path = options = options2 = fstype = d = p = o = NULL;
b08d03ff 1546
ef734fd6 1547 if ((k = fscanf(m->proc_self_mountinfo,
b08d03ff
LP		 1548 "%*s " /* (1) mount id */
1549 "%*s " /* (2) parent id */
1550 "%*s " /* (3) major:minor */
1551 "%*s " /* (4) root */
1552 "%ms " /* (5) mount point */
e537352b 1553 "%ms" /* (6) mount options */
b08d03ff 1554 "%*[^-]" /* (7) optional fields */
c899f8c6 1555 "- " /* (8) separator */
e537352b 1556 "%ms " /* (9) file system type */
ef734fd6 1557 "%ms" /* (10) mount source */
a2e0f3d3 1558 "%ms" /* (11) mount options 2 */
ef734fd6 1559 "%*[^\n]", /* some rubbish at the end */
b08d03ff 1560 &path,
e537352b
LP		 1561 &options,
1562 &fstype,
a2e0f3d3
LP		 1563 &device,
1564 &options2)) != 5) {
b08d03ff 1565
ef734fd6
LP		 1566 if (k == EOF)
1567 break;
b08d03ff 1568
1ddff895
FF		 1569 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1570 goto clean_up;
b08d03ff
LP		 1571 }
1572
a2e0f3d3
LP		 1573 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1574 r = -ENOMEM;
1575 goto finish;
1576 }
1577
e537352b
LP		 1578 if (!(d = cunescape(device)) ||
1579 !(p = cunescape(path))) {
1580 r = -ENOMEM;
1581 goto finish;
b08d03ff 1582 }
b08d03ff 1583
9fff8a1f 1584 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
60b912f6 1585 r = k;
b08d03ff 1586
1ddff895 1587clean_up:
e537352b
LP		 1588 free(device);
1589 free(path);
1590 free(options);
a2e0f3d3 1591 free(options2);
e537352b 1592 free(fstype);
b08d03ff
LP		 1593 free(d);
1594 free(p);
a2e0f3d3 1595 free(o);
b08d03ff
LP		 1596 }
1597
e537352b
LP		 1598finish:
1599 free(device);
1600 free(path);
1601 free(options);
a2e0f3d3 1602 free(options2);
e537352b
LP		 1603 free(fstype);
1604 free(d);
1605 free(p);
a2e0f3d3 1606 free(o);
e537352b
LP		 1607
1608 return r;
1609}
1610
1611static void mount_shutdown(Manager *m) {
1612 assert(m);
1613
a16e1123 1614 if (m->proc_self_mountinfo) {
e537352b 1615 fclose(m->proc_self_mountinfo);
a16e1123
LP		 1616 m->proc_self_mountinfo = NULL;
1617 }
b08d03ff
LP		 1618}
1619
1620static int mount_enumerate(Manager *m) {
1621 int r;
ef734fd6 1622 struct epoll_event ev;
b08d03ff
LP		 1623 assert(m);
1624
a16e1123
LP		 1625 if (!m->proc_self_mountinfo) {
1626 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1627 return -errno;
ef734fd6 1628
a16e1123
LP		 1629 m->mount_watch.type = WATCH_MOUNT;
1630 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
ef734fd6 1631
a16e1123 1632 zero(ev);
4e434314 1633 ev.events = EPOLLPRI;
a16e1123 1634 ev.data.ptr = &m->mount_watch;
ef734fd6 1635
a16e1123
LP		 1636 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1637 return -errno;
1638 }
ef734fd6 1639
e537352b 1640 if ((r = mount_load_etc_fstab(m)) < 0)
b08d03ff
LP		 1641 goto fail;
1642
ef734fd6 1643 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
b08d03ff
LP		 1644 goto fail;
1645
1646 return 0;
1647
1648fail:
1649 mount_shutdown(m);
1650 return r;
5cb5a6ff
LP		 1651}
1652
ef734fd6
LP		 1653void mount_fd_event(Manager *m, int events) {
1654 Meta *meta;
1655 int r;
1656
1657 assert(m);
4e434314 1658 assert(events & EPOLLPRI);
ef734fd6
LP		 1659
1660 /* The manager calls this for every fd event happening on the
1661 * /proc/self/mountinfo file, which informs us about mounting
1662 * table changes */
1663
1664 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
e364ad06 1665 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
e537352b
LP		 1666
1667 /* Reset flags, just in case, for later calls */
1668 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1669 Mount *mount = (Mount*) meta;
1670
1671 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1672 }
1673
ef734fd6
LP		 1674 return;
1675 }
1676
1677 manager_dispatch_load_queue(m);
1678
1679 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1680 Mount *mount = (Mount*) meta;
1681
e537352b
LP		 1682 if (!mount->is_mounted) {
1683 /* This has just been unmounted. */
1684
ef734fd6 1685 mount->from_proc_self_mountinfo = false;
e537352b
LP		 1686
1687 switch (mount->state) {
1688
1689 case MOUNT_MOUNTED:
1690 mount_enter_dead(mount, true);
1691 break;
1692
1693 default:
1694 mount_set_state(mount, mount->state);
1695 break;
1696
1697 }
1698
1699 } else if (mount->just_mounted || mount->just_changed) {
1700
60b912f6 1701 /* New or changed mount entry */
e537352b
LP		 1702
1703 switch (mount->state) {
1704
1705 case MOUNT_DEAD:
fdf20a31 1706 case MOUNT_FAILED:
e537352b
LP		 1707 mount_enter_mounted(mount, true);
1708 break;
1709
1710 case MOUNT_MOUNTING:
8d567588 1711 mount_enter_mounting_done(mount);
e537352b
LP		 1712 break;
1713
1714 default:
1715 /* Nothing really changed, but let's
1716 * issue an notification call
1717 * nonetheless, in case somebody is
1718 * waiting for this. (e.g. file system
1719 * ro/rw remounts.) */
1720 mount_set_state(mount, mount->state);
1721 break;
1722 }
1723 }
1724
1725 /* Reset the flags for later calls */
1726 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1727 }
1728}
1729
fdf20a31 1730static void mount_reset_failed(Unit *u) {
5632e374
LP		 1731 Mount *m = MOUNT(u);
1732
1733 assert(m);
1734
fdf20a31 1735 if (m->state == MOUNT_FAILED)
5632e374
LP		 1736 mount_set_state(m, MOUNT_DEAD);
1737
1738 m->failure = false;
1739}
1740
8a0867d6
LP		 1741static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1742 Mount *m = MOUNT(u);
1743 int r = 0;
1744 Set *pid_set = NULL;
1745
1746 assert(m);
1747
1748 if (who == KILL_MAIN) {
1749 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1750 return -EINVAL;
1751 }
1752
1753 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1754 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1755 return -ENOENT;
1756 }
1757
1758 if (m->control_pid > 0)
cd25cce9 1759 if (kill(m->control_pid, signo) < 0)
8a0867d6
LP		 1760 r = -errno;
1761
1762 if (mode == KILL_CONTROL_GROUP) {
1763 int q;
1764
1765 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1766 return -ENOMEM;
1767
1768 /* Exclude the control pid from being killed via the cgroup */
1769 if (m->control_pid > 0)
1770 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1771 r = q;
1772 goto finish;
1773 }
1774
430c18ed 1775 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
8a0867d6
LP		 1776 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1777 r = q;
1778 }
1779
1780finish:
1781 if (pid_set)
1782 set_free(pid_set);
1783
1784 return r;
1785}
1786
a16e1123
LP		 1787static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1788 [MOUNT_DEAD] = "dead",
1789 [MOUNT_MOUNTING] = "mounting",
1790 [MOUNT_MOUNTING_DONE] = "mounting-done",
1791 [MOUNT_MOUNTED] = "mounted",
1792 [MOUNT_REMOUNTING] = "remounting",
1793 [MOUNT_UNMOUNTING] = "unmounting",
1794 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1795 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1796 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1797 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1798 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1799 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
fdf20a31 1800 [MOUNT_FAILED] = "failed"
a16e1123
LP		 1801};
1802
1803DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1804
1805static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1806 [MOUNT_EXEC_MOUNT] = "ExecMount",
1807 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1808 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1809};
1810
1811DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1812
87f0e418 1813const UnitVTable mount_vtable = {
5cb5a6ff
LP		 1814 .suffix = ".mount",
1815
e537352b 1816 .no_alias = true,
9e2f7c11 1817 .no_instances = true,
9e58ff9c 1818 .show_status = true,
e537352b
LP		 1819
1820 .init = mount_init,
1821 .load = mount_load,
034c6ed7 1822 .done = mount_done,
e537352b 1823
f50e0a01
LP		 1824 .coldplug = mount_coldplug,
1825
034c6ed7 1826 .dump = mount_dump,
5cb5a6ff 1827
e537352b
LP		 1828 .start = mount_start,
1829 .stop = mount_stop,
1830 .reload = mount_reload,
1831
8a0867d6
LP		 1832 .kill = mount_kill,
1833
a16e1123
LP		 1834 .serialize = mount_serialize,
1835 .deserialize_item = mount_deserialize_item,
1836
f50e0a01 1837 .active_state = mount_active_state,
10a94420 1838 .sub_state_to_string = mount_sub_state_to_string,
b08d03ff 1839
701cc384
LP		 1840 .check_gc = mount_check_gc,
1841
e537352b
LP		 1842 .sigchld_event = mount_sigchld_event,
1843 .timer_event = mount_timer_event,
1844
fdf20a31 1845 .reset_failed = mount_reset_failed,
5632e374 1846
c4e2ceae 1847 .bus_interface = "org.freedesktop.systemd1.Mount",
4139c1b2 1848 .bus_message_handler = bus_mount_message_handler,
c4e2ceae 1849 .bus_invalidating_properties = bus_mount_invalidating_properties,
4139c1b2 1850
f50e0a01
LP		 1851 .enumerate = mount_enumerate,
1852 .shutdown = mount_shutdown
5cb5a6ff 1853};
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