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unit: distuingish mandatory from triggering conditions
[thirdparty/systemd.git] / src / mount.c
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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"
5cb5a6ff 40
f50e0a01
LP		 41static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
42 [MOUNT_DEAD] = UNIT_INACTIVE,
43 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
e537352b 44 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
f50e0a01 45 [MOUNT_MOUNTED] = UNIT_ACTIVE,
032ff4af 46 [MOUNT_REMOUNTING] = UNIT_RELOADING,
f50e0a01 47 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
e537352b
LP		 48 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
49 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
032ff4af
LP		 50 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
51 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
e537352b
LP		 52 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
53 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
fdf20a31 54 [MOUNT_FAILED] = UNIT_FAILED
f50e0a01 55};
5cb5a6ff 56
a16e1123
LP		 57static void mount_init(Unit *u) {
58 Mount *m = MOUNT(u);
5cb5a6ff 59
a16e1123
LP		 60 assert(u);
61 assert(u->meta.load_state == UNIT_STUB);
62
63 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
3e5235b0
LP		 64 m->directory_mode = 0755;
65
c3686083 66 exec_context_init(&m->exec_context);
0a494f1f 67 m->exec_context.std_output = EXEC_OUTPUT_KMSG;
c3686083 68
a16e1123
LP		 69 /* We need to make sure that /bin/mount is always called in
70 * the same process group as us, so that the autofs kernel
71 * side doesn't send us another mount request while we are
72 * already trying to comply its last one. */
74922904 73 m->exec_context.same_pgrp = true;
8d567588 74
a16e1123
LP		 75 m->timer_watch.type = WATCH_INVALID;
76
77 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
8d567588
LP		 78}
79
a16e1123 80static void mount_unwatch_control_pid(Mount *m) {
5e94833f
LP		 81 assert(m);
82
83 if (m->control_pid <= 0)
84 return;
85
86 unit_unwatch_pid(UNIT(m), m->control_pid);
87 m->control_pid = 0;
88}
89
e537352b
LP		 90static void mount_parameters_done(MountParameters *p) {
91 assert(p);
92
93 free(p->what);
94 free(p->options);
95 free(p->fstype);
96
97 p->what = p->options = p->fstype = NULL;
98}
99
87f0e418 100static void mount_done(Unit *u) {
ef734fd6 101 Mount *m = MOUNT(u);
e0fa621b 102 Meta *other;
034c6ed7 103
ef734fd6 104 assert(m);
034c6ed7 105
e537352b
LP		 106 free(m->where);
107 m->where = NULL;
f50e0a01 108
e0fa621b
LP		 109 /* Try to detach us from the automount unit if there is any */
110 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT]) {
111 Automount *a = (Automount*) other;
112
113 if (a->mount == m)
114 a->mount = NULL;
115 }
116
e537352b
LP		 117 mount_parameters_done(&m->parameters_etc_fstab);
118 mount_parameters_done(&m->parameters_proc_self_mountinfo);
119 mount_parameters_done(&m->parameters_fragment);
ef734fd6 120
e537352b
LP		 121 exec_context_done(&m->exec_context);
122 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
123 m->control_command = NULL;
f50e0a01 124
a16e1123 125 mount_unwatch_control_pid(m);
f50e0a01 126
e537352b 127 unit_unwatch_timer(u, &m->timer_watch);
f50e0a01
LP		 128}
129
6e2ef85b
LP		 130static int mount_add_mount_links(Mount *m) {
131 Meta *other;
b08d03ff 132 int r;
5c78d8e2 133 MountParameters *pm;
b08d03ff 134
6e2ef85b 135 assert(m);
b08d03ff 136
5c78d8e2
LP		 137 if (m->from_fragment)
138 pm = &m->parameters_fragment;
139 else if (m->from_etc_fstab)
140 pm = &m->parameters_etc_fstab;
141 else
142 pm = NULL;
143
6e2ef85b
LP		 144 /* Adds in links to other mount points that might lie below or
145 * above us in the hierarchy */
e537352b 146
6e2ef85b
LP		 147 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
148 Mount *n = (Mount*) other;
5c78d8e2 149 MountParameters *pn;
07b0b134 150
6e2ef85b
LP		 151 if (n == m)
152 continue;
b08d03ff 153
6e2ef85b
LP		 154 if (n->meta.load_state != UNIT_LOADED)
155 continue;
b08d03ff 156
5c78d8e2
LP		 157 if (n->from_fragment)
158 pn = &n->parameters_fragment;
159 else if (n->from_etc_fstab)
160 pn = &n->parameters_etc_fstab;
161 else
162 pn = NULL;
163
6e2ef85b 164 if (path_startswith(m->where, n->where)) {
b08d03ff 165
6e2ef85b
LP		 166 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
167 return r;
b08d03ff 168
6e2ef85b
LP		 169 if (n->from_etc_fstab || n->from_fragment)
170 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
171 return r;
b08d03ff 172
6e2ef85b 173 } else if (path_startswith(n->where, m->where)) {
b08d03ff 174
5c78d8e2
LP		 175 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
176 return r;
177
178 if (m->from_etc_fstab || m->from_fragment)
179 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
180 return r;
181
182 } else if (pm && path_startswith(pm->what, n->where)) {
183
184 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
6e2ef85b
LP		 185 return r;
186
187 if (m->from_etc_fstab || m->from_fragment)
5c78d8e2
LP		 188 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
189 return r;
190
191 } else if (pn && path_startswith(pn->what, m->where)) {
192
193 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
194 return r;
195
196 if (n->from_etc_fstab || n->from_fragment)
6e2ef85b
LP		 197 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
198 return r;
199 }
200 }
b08d03ff
LP		 201
202 return 0;
203}
204
6e2ef85b 205static int mount_add_swap_links(Mount *m) {
ef734fd6 206 Meta *other;
b08d03ff
LP		 207 int r;
208
6e2ef85b 209 assert(m);
b08d03ff 210
6e2ef85b
LP		 211 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
212 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
213 return r;
b08d03ff 214
6e2ef85b
LP		 215 return 0;
216}
b08d03ff 217
01f78473
LP		 218static int mount_add_path_links(Mount *m) {
219 Meta *other;
220 int r;
221
222 assert(m);
223
224 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
225 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
226 return r;
227
228 return 0;
229}
230
6e2ef85b
LP		 231static int mount_add_automount_links(Mount *m) {
232 Meta *other;
233 int r;
e537352b 234
6e2ef85b 235 assert(m);
b08d03ff 236
6e2ef85b
LP		 237 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
238 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
239 return r;
b08d03ff 240
6e2ef85b
LP		 241 return 0;
242}
b08d03ff 243
6e2ef85b
LP		 244static int mount_add_socket_links(Mount *m) {
245 Meta *other;
246 int r;
b08d03ff 247
6e2ef85b 248 assert(m);
b08d03ff 249
6e2ef85b
LP		 250 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
251 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
252 return r;
b08d03ff
LP		 253
254 return 0;
255}
256
07b0b134 257static char* mount_test_option(const char *haystack, const char *needle) {
e537352b
LP		 258 struct mntent me;
259
260 assert(needle);
261
262 /* Like glibc's hasmntopt(), but works on a string, not a
263 * struct mntent */
264
265 if (!haystack)
266 return false;
267
268 zero(me);
269 me.mnt_opts = (char*) haystack;
270
07b0b134 271 return hasmntopt(&me, needle);
e537352b
LP		 272}
273
274static int mount_add_target_links(Mount *m) {
a55da3cd 275 const char *target, *after = NULL;
e537352b 276 MountParameters *p;
a16e1123 277 Unit *tu;
e537352b 278 int r;
d9143006 279 bool noauto, nofail, handle, automount;
e537352b
LP		 280
281 assert(m);
282
283 if (m->from_fragment)
284 p = &m->parameters_fragment;
285 else if (m->from_etc_fstab)
286 p = &m->parameters_etc_fstab;
287 else
288 return 0;
289
07b0b134 290 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
d9143006 291 nofail = !!mount_test_option(p->options, "nofail");
d3689161
LP		 292 handle = !!mount_test_option(p->options, "comment=systemd.mount") ||
293 m->meta.manager->mount_auto;
07b0b134 294 automount = !!mount_test_option(p->options, "comment=systemd.automount");
e537352b 295
e537352b 296 if (mount_test_option(p->options, "_netdev") ||
40b8a332 297 (p->fstype && fstype_is_network(p->fstype))) {
e537352b 298 target = SPECIAL_REMOTE_FS_TARGET;
a55da3cd
LP		 299
300 if (m->meta.manager->running_as == MANAGER_SYSTEM)
301 after = SPECIAL_NETWORK_TARGET;
302 } else
e537352b
LP		 303 target = SPECIAL_LOCAL_FS_TARGET;
304
398ef8ba 305 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
e537352b
LP		 306 return r;
307
a55da3cd 308 if (after)
50483512 309 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
a55da3cd
LP		 310 return r;
311
a3d4e06d 312 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
a16e1123
LP		 313 Unit *am;
314
315 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
9fcc065a 316 return r;
e537352b 317
2c966c03 318 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
a16e1123
LP		 319 } else {
320
81bf310e
LP		 321 /* Automatically add mount points that aren't natively
322 * configured to local-fs.target */
323 if (!noauto &&
d9143006 324 !nofail &&
81bf310e 325 handle &&
510051fc
LP		 326 m->from_etc_fstab &&
327 m->meta.manager->running_as == MANAGER_SYSTEM)
328 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
329 return r;
a16e1123 330
701cc384 331 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
a16e1123 332 }
e537352b
LP		 333}
334
5c78d8e2
LP		 335static bool mount_is_bind(MountParameters *p) {
336 assert(p);
337
338 if (p->fstype && streq(p->fstype, "bind"))
339 return true;
340
341 if (mount_test_option(p->options, "bind"))
342 return true;
343
344 return false;
345}
346
173a8d04
LP		 347static int mount_add_device_links(Mount *m) {
348 MountParameters *p;
9fff8a1f 349 int r;
173a8d04
LP		 350
351 assert(m);
352
353 if (m->from_fragment)
354 p = &m->parameters_fragment;
355 else if (m->from_etc_fstab)
356 p = &m->parameters_etc_fstab;
357 else
358 return 0;
359
9fff8a1f 360 if (!p->what)
173a8d04 361 return 0;
5c78d8e2 362
9fff8a1f
LP		 363 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
364 bool nofail, noauto;
173a8d04 365
9fff8a1f
LP		 366 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
367 nofail = !!mount_test_option(p->options, "nofail");
368
369 if ((r = unit_add_node_link(UNIT(m), p->what,
370 !noauto && nofail &&
371 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
372 return r;
373 }
374
491ad5dc 375 if (p->passno > 0 &&
ff2e0f05 376 !mount_is_bind(p) &&
b65a25f2
LP		 377 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
378 !path_equal(m->where, "/")) {
9fff8a1f
LP		 379 char *name;
380 Unit *fsck;
381 /* Let's add in the fsck service */
173a8d04 382
a9e1f5ec 383 /* aka SPECIAL_FSCK_SERVICE */
9fff8a1f
LP		 384 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
385 return -ENOMEM;
386
387 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
388 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
389 free(name);
390 return r;
391 }
392
393 free(name);
394
395 SERVICE(fsck)->fsck_passno = p->passno;
396
0355825f 397 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
9fff8a1f
LP		 398 return r;
399 }
400
401 return 0;
173a8d04
LP		 402}
403
2edd4434
LP		 404static int mount_add_default_dependencies(Mount *m) {
405 int r;
406
407 assert(m);
408
75d287d3
LP		 409 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
410 !path_equal(m->where, "/")) {
2edd4434 411
417e842d 412 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_BEFORE, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0)
2edd4434
LP		 413 return r;
414
ead8e478 415 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
75d287d3 416 return r;
2edd4434
LP		 417 }
418
419 return 0;
420}
421
8d567588
LP		 422static int mount_verify(Mount *m) {
423 bool b;
424 char *e;
425 assert(m);
426
8cbef760 427 if (m->meta.load_state != UNIT_LOADED)
8d567588
LP		 428 return 0;
429
8cbef760
LP		 430 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
431 return -ENOENT;
432
a16e1123 433 if (!(e = unit_name_from_path(m->where, ".mount")))
8d567588
LP		 434 return -ENOMEM;
435
436 b = unit_has_name(UNIT(m), e);
437 free(e);
438
439 if (!b) {
4cd1fbcc 440 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
8d567588
LP		 441 return -EINVAL;
442 }
443
4e85aff4 444 if (m->meta.fragment_path && !m->parameters_fragment.what) {
4cd1fbcc 445 log_error("%s's What setting is missing. Refusing.", m->meta.id);
4e85aff4
LP		 446 return -EBADMSG;
447 }
448
2e22afe9 449 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
4d0e5dbd
LP		 450 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
451 return -EINVAL;
452 }
453
8d567588
LP		 454 return 0;
455}
456
e537352b
LP		 457static int mount_load(Unit *u) {
458 Mount *m = MOUNT(u);
459 int r;
460
461 assert(u);
462 assert(u->meta.load_state == UNIT_STUB);
463
464 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
465 return r;
466
467 /* This is a new unit? Then let's add in some extras */
468 if (u->meta.load_state == UNIT_LOADED) {
27abbe82
LP		 469 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
470 return r;
471
4e85aff4
LP		 472 if (m->meta.fragment_path)
473 m->from_fragment = true;
e537352b 474
a16e1123
LP		 475 if (!m->where)
476 if (!(m->where = unit_name_to_path(u->meta.id)))
477 return -ENOMEM;
478
479 path_kill_slashes(m->where);
480
4e85aff4
LP		 481 if (!m->meta.description)
482 if ((r = unit_set_description(u, m->where)) < 0)
483 return r;
e537352b 484
173a8d04
LP		 485 if ((r = mount_add_device_links(m)) < 0)
486 return r;
6e2ef85b
LP		 487
488 if ((r = mount_add_mount_links(m)) < 0)
489 return r;
490
491 if ((r = mount_add_socket_links(m)) < 0)
492 return r;
493
494 if ((r = mount_add_swap_links(m)) < 0)
e537352b
LP		 495 return r;
496
01f78473
LP		 497 if ((r = mount_add_path_links(m)) < 0)
498 return r;
499
6e2ef85b 500 if ((r = mount_add_automount_links(m)) < 0)
e537352b
LP		 501 return r;
502
6e2ef85b 503 if ((r = mount_add_target_links(m)) < 0)
e537352b
LP		 504 return r;
505
d686d8a9 506 if ((r = unit_add_default_cgroups(u)) < 0)
e537352b 507 return r;
4e67ddd6 508
2edd4434
LP		 509 if (m->meta.default_dependencies)
510 if ((r = mount_add_default_dependencies(m)) < 0)
4e67ddd6 511 return r;
e537352b
LP		 512 }
513
8d567588 514 return mount_verify(m);
e537352b
LP		 515}
516
a16e1123
LP		 517static int mount_notify_automount(Mount *m, int status) {
518 Unit *p;
519 int r;
520
521 assert(m);
522
523 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
524 return r == -ENOENT ? 0 : r;
525
526 return automount_send_ready(AUTOMOUNT(p), status);
527}
528
e537352b
LP		 529static void mount_set_state(Mount *m, MountState state) {
530 MountState old_state;
531 assert(m);
532
533 old_state = m->state;
534 m->state = state;
535
536 if (state != MOUNT_MOUNTING &&
537 state != MOUNT_MOUNTING_DONE &&
538 state != MOUNT_REMOUNTING &&
539 state != MOUNT_UNMOUNTING &&
540 state != MOUNT_MOUNTING_SIGTERM &&
541 state != MOUNT_MOUNTING_SIGKILL &&
542 state != MOUNT_UNMOUNTING_SIGTERM &&
543 state != MOUNT_UNMOUNTING_SIGKILL &&
544 state != MOUNT_REMOUNTING_SIGTERM &&
545 state != MOUNT_REMOUNTING_SIGKILL) {
546 unit_unwatch_timer(UNIT(m), &m->timer_watch);
a16e1123 547 mount_unwatch_control_pid(m);
e537352b 548 m->control_command = NULL;
a16e1123 549 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
e537352b
LP		 550 }
551
8d567588
LP		 552 if (state == MOUNT_MOUNTED ||
553 state == MOUNT_REMOUNTING)
554 mount_notify_automount(m, 0);
555 else if (state == MOUNT_DEAD ||
556 state == MOUNT_UNMOUNTING ||
557 state == MOUNT_MOUNTING_SIGTERM ||
558 state == MOUNT_MOUNTING_SIGKILL ||
559 state == MOUNT_REMOUNTING_SIGTERM ||
560 state == MOUNT_REMOUNTING_SIGKILL ||
561 state == MOUNT_UNMOUNTING_SIGTERM ||
562 state == MOUNT_UNMOUNTING_SIGKILL ||
fdf20a31 563 state == MOUNT_FAILED)
8d567588
LP		 564 mount_notify_automount(m, -ENODEV);
565
e537352b 566 if (state != old_state)
40d50879 567 log_debug("%s changed %s -> %s",
4cd1fbcc 568 m->meta.id,
a16e1123
LP		 569 mount_state_to_string(old_state),
570 mount_state_to_string(state));
e537352b 571
e2f3b44c
LP		 572 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
573 m->reload_failure = false;
e537352b
LP		 574}
575
576static int mount_coldplug(Unit *u) {
577 Mount *m = MOUNT(u);
a16e1123
LP		 578 MountState new_state = MOUNT_DEAD;
579 int r;
e537352b
LP		 580
581 assert(m);
582 assert(m->state == MOUNT_DEAD);
583
a16e1123
LP		 584 if (m->deserialized_state != m->state)
585 new_state = m->deserialized_state;
586 else if (m->from_proc_self_mountinfo)
587 new_state = MOUNT_MOUNTED;
e537352b 588
a16e1123 589 if (new_state != m->state) {
e537352b 590
a16e1123
LP		 591 if (new_state == MOUNT_MOUNTING ||
592 new_state == MOUNT_MOUNTING_DONE ||
593 new_state == MOUNT_REMOUNTING ||
594 new_state == MOUNT_UNMOUNTING ||
595 new_state == MOUNT_MOUNTING_SIGTERM ||
596 new_state == MOUNT_MOUNTING_SIGKILL ||
597 new_state == MOUNT_UNMOUNTING_SIGTERM ||
598 new_state == MOUNT_UNMOUNTING_SIGKILL ||
599 new_state == MOUNT_REMOUNTING_SIGTERM ||
600 new_state == MOUNT_REMOUNTING_SIGKILL) {
e537352b 601
a16e1123
LP		 602 if (m->control_pid <= 0)
603 return -EBADMSG;
e537352b 604
a16e1123
LP		 605 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
606 return r;
e537352b 607
a16e1123
LP		 608 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
609 return r;
610 }
e537352b 611
a16e1123
LP		 612 mount_set_state(m, new_state);
613 }
e537352b
LP		 614
615 return 0;
e537352b
LP		 616}
617
618static void mount_dump(Unit *u, FILE *f, const char *prefix) {
619 Mount *m = MOUNT(u);
620 MountParameters *p;
621
622 assert(m);
623 assert(f);
624
625 if (m->from_proc_self_mountinfo)
626 p = &m->parameters_proc_self_mountinfo;
627 else if (m->from_fragment)
628 p = &m->parameters_fragment;
629 else
630 p = &m->parameters_etc_fstab;
631
632 fprintf(f,
633 "%sMount State: %s\n"
634 "%sWhere: %s\n"
635 "%sWhat: %s\n"
636 "%sFile System Type: %s\n"
637 "%sOptions: %s\n"
638 "%sFrom /etc/fstab: %s\n"
639 "%sFrom /proc/self/mountinfo: %s\n"
640 "%sFrom fragment: %s\n"
3e5235b0 641 "%sDirectoryMode: %04o\n",
a16e1123 642 prefix, mount_state_to_string(m->state),
e537352b
LP		 643 prefix, m->where,
644 prefix, strna(p->what),
645 prefix, strna(p->fstype),
646 prefix, strna(p->options),
647 prefix, yes_no(m->from_etc_fstab),
648 prefix, yes_no(m->from_proc_self_mountinfo),
649 prefix, yes_no(m->from_fragment),
3e5235b0 650 prefix, m->directory_mode);
e537352b
LP		 651
652 if (m->control_pid > 0)
653 fprintf(f,
bb00e604
LP		 654 "%sControl PID: %lu\n",
655 prefix, (unsigned long) m->control_pid);
e537352b
LP		 656
657 exec_context_dump(&m->exec_context, f, prefix);
658}
659
a16e1123
LP		 660static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
661 pid_t pid;
662 int r;
663
664 assert(m);
665 assert(c);
666 assert(_pid);
667
668 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
669 goto fail;
670
671 if ((r = exec_spawn(c,
672 NULL,
673 &m->exec_context,
674 NULL, 0,
1137a57c 675 m->meta.manager->environment,
a16e1123
LP		 676 true,
677 true,
1e3ad081 678 true,
c3686083 679 m->meta.manager->confirm_spawn,
4cd1fbcc 680 m->meta.cgroup_bondings,
a16e1123
LP		 681 &pid)) < 0)
682 goto fail;
683
684 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
685 /* FIXME: we need to do something here */
686 goto fail;
687
688 *_pid = pid;
689
690 return 0;
691
692fail:
693 unit_unwatch_timer(UNIT(m), &m->timer_watch);
694
695 return r;
696}
697
e537352b
LP		 698static void mount_enter_dead(Mount *m, bool success) {
699 assert(m);
700
701 if (!success)
702 m->failure = true;
703
fdf20a31 704 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
e537352b
LP		 705}
706
80876c20
LP		 707static void mount_enter_mounted(Mount *m, bool success) {
708 assert(m);
709
710 if (!success)
711 m->failure = true;
712
713 mount_set_state(m, MOUNT_MOUNTED);
714}
715
e537352b
LP		 716static void mount_enter_signal(Mount *m, MountState state, bool success) {
717 int r;
ca949c9d
LP		 718 Set *pid_set = NULL;
719 bool wait_for_exit = false;
e537352b
LP		 720
721 assert(m);
722
723 if (!success)
724 m->failure = true;
725
2e22afe9 726 if (m->exec_context.kill_mode != KILL_NONE) {
80876c20
LP		 727 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
728 state == MOUNT_UNMOUNTING_SIGTERM ||
2e22afe9 729 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
e537352b 730
ca949c9d 731 if (m->control_pid > 0) {
430c18ed
LP		 732 if (kill_and_sigcont(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
733 -m->control_pid :
734 m->control_pid, sig) < 0 && errno != ESRCH)
e537352b 735
ca949c9d
LP		 736 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
737 else
738 wait_for_exit = true;
e537352b
LP		 739 }
740
ca949c9d 741 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
2e22afe9 742
ca949c9d
LP		 743 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
744 r = -ENOMEM;
e537352b
LP		 745 goto fail;
746 }
ca949c9d
LP		 747
748 /* Exclude the control pid from being killed via the cgroup */
749 if (m->control_pid > 0)
750 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
751 goto fail;
752
430c18ed 753 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
ca949c9d
LP		 754 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
755 log_warning("Failed to kill control group: %s", strerror(-r));
756 } else if (r > 0)
757 wait_for_exit = true;
758
759 set_free(pid_set);
760 }
e537352b
LP		 761 }
762
ca949c9d 763 if (wait_for_exit) {
80876c20
LP		 764 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
765 goto fail;
e537352b 766
80876c20
LP		 767 mount_set_state(m, state);
768 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
769 mount_enter_mounted(m, true);
770 else
e537352b
LP		 771 mount_enter_dead(m, true);
772
773 return;
774
775fail:
4cd1fbcc 776 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
e537352b 777
80876c20
LP		 778 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
779 mount_enter_mounted(m, false);
780 else
781 mount_enter_dead(m, false);
ca949c9d
LP		 782
783 if (pid_set)
784 set_free(pid_set);
e537352b
LP		 785}
786
787static void mount_enter_unmounting(Mount *m, bool success) {
e537352b
LP		 788 int r;
789
790 assert(m);
791
792 if (!success)
793 m->failure = true;
794
a16e1123
LP		 795 m->control_command_id = MOUNT_EXEC_UNMOUNT;
796 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
e537352b
LP		 797
798 if ((r = exec_command_set(
a16e1123 799 m->control_command,
e537352b
LP		 800 "/bin/umount",
801 m->where,
802 NULL)) < 0)
803 goto fail;
804
a16e1123 805 mount_unwatch_control_pid(m);
5e94833f 806
a16e1123 807 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
e537352b
LP		 808 goto fail;
809
810 mount_set_state(m, MOUNT_UNMOUNTING);
811
812 return;
813
814fail:
4cd1fbcc 815 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
e537352b
LP		 816 mount_enter_mounted(m, false);
817}
818
8d567588 819static void mount_enter_mounting(Mount *m) {
e537352b
LP		 820 int r;
821
822 assert(m);
823
a16e1123
LP		 824 m->control_command_id = MOUNT_EXEC_MOUNT;
825 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
e537352b 826
3e5235b0
LP		 827 mkdir_p(m->where, m->directory_mode);
828
e537352b
LP		 829 if (m->from_fragment)
830 r = exec_command_set(
a16e1123 831 m->control_command,
e537352b
LP		 832 "/bin/mount",
833 m->parameters_fragment.what,
834 m->where,
40b8a332 835 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
8d567588 836 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
e537352b
LP		 837 NULL);
838 else if (m->from_etc_fstab)
839 r = exec_command_set(
a16e1123 840 m->control_command,
e537352b
LP		 841 "/bin/mount",
842 m->where,
843 NULL);
844 else
845 r = -ENOENT;
846
847 if (r < 0)
848 goto fail;
849
a16e1123 850 mount_unwatch_control_pid(m);
5e94833f 851
a16e1123 852 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
e537352b
LP		 853 goto fail;
854
855 mount_set_state(m, MOUNT_MOUNTING);
856
857 return;
858
859fail:
4cd1fbcc 860 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
e537352b
LP		 861 mount_enter_dead(m, false);
862}
863
8d567588 864static void mount_enter_mounting_done(Mount *m) {
e537352b
LP		 865 assert(m);
866
e537352b
LP		 867 mount_set_state(m, MOUNT_MOUNTING_DONE);
868}
869
870static void mount_enter_remounting(Mount *m, bool success) {
e537352b
LP		 871 int r;
872
873 assert(m);
874
875 if (!success)
876 m->failure = true;
877
a16e1123
LP		 878 m->control_command_id = MOUNT_EXEC_REMOUNT;
879 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
e537352b
LP		 880
881 if (m->from_fragment) {
882 char *buf = NULL;
883 const char *o;
884
885 if (m->parameters_fragment.options) {
886 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
887 r = -ENOMEM;
888 goto fail;
889 }
890
891 o = buf;
892 } else
893 o = "remount";
894
895 r = exec_command_set(
a16e1123 896 m->control_command,
e537352b
LP		 897 "/bin/mount",
898 m->parameters_fragment.what,
899 m->where,
40b8a332 900 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
e537352b
LP		 901 "-o", o,
902 NULL);
903
904 free(buf);
905 } else if (m->from_etc_fstab)
906 r = exec_command_set(
a16e1123 907 m->control_command,
e537352b
LP		 908 "/bin/mount",
909 m->where,
910 "-o", "remount",
911 NULL);
912 else
913 r = -ENOENT;
914
60b912f6 915 if (r < 0)
e537352b 916 goto fail;
e537352b 917
a16e1123 918 mount_unwatch_control_pid(m);
5e94833f 919
a16e1123 920 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
e537352b
LP		 921 goto fail;
922
923 mount_set_state(m, MOUNT_REMOUNTING);
924
925 return;
926
927fail:
e364ad06 928 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
e2f3b44c
LP		 929 m->reload_failure = true;
930 mount_enter_mounted(m, true);
e537352b
LP		 931}
932
933static int mount_start(Unit *u) {
934 Mount *m = MOUNT(u);
935
936 assert(m);
937
938 /* We cannot fulfill this request right now, try again later
939 * please! */
940 if (m->state == MOUNT_UNMOUNTING ||
941 m->state == MOUNT_UNMOUNTING_SIGTERM ||
60b912f6
LP		 942 m->state == MOUNT_UNMOUNTING_SIGKILL ||
943 m->state == MOUNT_MOUNTING_SIGTERM ||
944 m->state == MOUNT_MOUNTING_SIGKILL)
e537352b
LP		 945 return -EAGAIN;
946
947 /* Already on it! */
60b912f6 948 if (m->state == MOUNT_MOUNTING)
e537352b
LP		 949 return 0;
950
fdf20a31 951 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
e537352b
LP		 952
953 m->failure = false;
8d567588 954 mount_enter_mounting(m);
e537352b
LP		 955 return 0;
956}
957
958static int mount_stop(Unit *u) {
959 Mount *m = MOUNT(u);
960
961 assert(m);
962
e537352b
LP		 963 /* Already on it */
964 if (m->state == MOUNT_UNMOUNTING ||
965 m->state == MOUNT_UNMOUNTING_SIGKILL ||
60b912f6
LP		 966 m->state == MOUNT_UNMOUNTING_SIGTERM ||
967 m->state == MOUNT_MOUNTING_SIGTERM ||
968 m->state == MOUNT_MOUNTING_SIGKILL)
e537352b
LP		 969 return 0;
970
3f6c78dc
LP		 971 assert(m->state == MOUNT_MOUNTING ||
972 m->state == MOUNT_MOUNTING_DONE ||
973 m->state == MOUNT_MOUNTED ||
3f6c78dc
LP		 974 m->state == MOUNT_REMOUNTING ||
975 m->state == MOUNT_REMOUNTING_SIGTERM ||
976 m->state == MOUNT_REMOUNTING_SIGKILL);
e537352b
LP		 977
978 mount_enter_unmounting(m, true);
979 return 0;
980}
981
982static int mount_reload(Unit *u) {
983 Mount *m = MOUNT(u);
984
985 assert(m);
986
987 if (m->state == MOUNT_MOUNTING_DONE)
988 return -EAGAIN;
989
990 assert(m->state == MOUNT_MOUNTED);
991
992 mount_enter_remounting(m, true);
993 return 0;
994}
995
a16e1123
LP		 996static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
997 Mount *m = MOUNT(u);
998
999 assert(m);
1000 assert(f);
1001 assert(fds);
1002
1003 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1004 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1005
1006 if (m->control_pid > 0)
5925dd3c 1007 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
a16e1123
LP		 1008
1009 if (m->control_command_id >= 0)
1010 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1011
1012 return 0;
1013}
1014
1015static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1016 Mount *m = MOUNT(u);
a16e1123
LP		 1017
1018 assert(u);
1019 assert(key);
1020 assert(value);
1021 assert(fds);
1022
1023 if (streq(key, "state")) {
1024 MountState state;
1025
1026 if ((state = mount_state_from_string(value)) < 0)
1027 log_debug("Failed to parse state value %s", value);
1028 else
1029 m->deserialized_state = state;
1030 } else if (streq(key, "failure")) {
1031 int b;
1032
1033 if ((b = parse_boolean(value)) < 0)
1034 log_debug("Failed to parse failure value %s", value);
1035 else
1036 m->failure = b || m->failure;
1037
1038 } else if (streq(key, "control-pid")) {
5925dd3c 1039 pid_t pid;
a16e1123 1040
e364ad06 1041 if (parse_pid(value, &pid) < 0)
a16e1123
LP		 1042 log_debug("Failed to parse control-pid value %s", value);
1043 else
5925dd3c 1044 m->control_pid = pid;
a16e1123
LP		 1045 } else if (streq(key, "control-command")) {
1046 MountExecCommand id;
1047
1048 if ((id = mount_exec_command_from_string(value)) < 0)
1049 log_debug("Failed to parse exec-command value %s", value);
1050 else {
1051 m->control_command_id = id;
1052 m->control_command = m->exec_command + id;
1053 }
1054
1055 } else
1056 log_debug("Unknown serialization key '%s'", key);
1057
1058 return 0;
1059}
1060
e537352b
LP		 1061static UnitActiveState mount_active_state(Unit *u) {
1062 assert(u);
1063
1064 return state_translation_table[MOUNT(u)->state];
1065}
1066
10a94420
LP		 1067static const char *mount_sub_state_to_string(Unit *u) {
1068 assert(u);
1069
a16e1123 1070 return mount_state_to_string(MOUNT(u)->state);
10a94420
LP		 1071}
1072
701cc384
LP		 1073static bool mount_check_gc(Unit *u) {
1074 Mount *m = MOUNT(u);
1075
1076 assert(m);
1077
1078 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1079}
1080
e537352b
LP		 1081static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1082 Mount *m = MOUNT(u);
1083 bool success;
1084
1085 assert(m);
1086 assert(pid >= 0);
1087
8c47c732
LP		 1088 if (pid != m->control_pid)
1089 return;
e537352b 1090
e537352b
LP		 1091 m->control_pid = 0;
1092
8c47c732
LP		 1093 success = is_clean_exit(code, status);
1094 m->failure = m->failure || !success;
1095
a16e1123 1096 if (m->control_command) {
169c1bda 1097 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
a16e1123
LP		 1098 m->control_command = NULL;
1099 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1100 }
1101
92abbefb
LP		 1102 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1103 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
e537352b
LP		 1104
1105 /* Note that mount(8) returning and the kernel sending us a
1106 * mount table change event might happen out-of-order. If an
1107 * operation succeed we assume the kernel will follow soon too
1108 * and already change into the resulting state. If it fails
1109 * we check if the kernel still knows about the mount. and
1110 * change state accordingly. */
1111
1112 switch (m->state) {
1113
1114 case MOUNT_MOUNTING:
1115 case MOUNT_MOUNTING_DONE:
1116 case MOUNT_MOUNTING_SIGKILL:
1117 case MOUNT_MOUNTING_SIGTERM:
e537352b 1118
19b160fa 1119 if (success)
e537352b
LP		 1120 mount_enter_mounted(m, true);
1121 else if (m->from_proc_self_mountinfo)
1122 mount_enter_mounted(m, false);
1123 else
1124 mount_enter_dead(m, false);
1125 break;
1126
e2f3b44c
LP		 1127 case MOUNT_REMOUNTING:
1128 case MOUNT_REMOUNTING_SIGKILL:
1129 case MOUNT_REMOUNTING_SIGTERM:
1130
1131 m->reload_failure = !success;
1132 if (m->from_proc_self_mountinfo)
1133 mount_enter_mounted(m, true);
1134 else
1135 mount_enter_dead(m, true);
1136
1137 break;
1138
e537352b
LP		 1139 case MOUNT_UNMOUNTING:
1140 case MOUNT_UNMOUNTING_SIGKILL:
1141 case MOUNT_UNMOUNTING_SIGTERM:
1142
1143 if (success)
1144 mount_enter_dead(m, true);
1145 else if (m->from_proc_self_mountinfo)
1146 mount_enter_mounted(m, false);
1147 else
1148 mount_enter_dead(m, false);
1149 break;
1150
1151 default:
1152 assert_not_reached("Uh, control process died at wrong time.");
1153 }
c4e2ceae
LP		 1154
1155 /* Notify clients about changed exit status */
1156 unit_add_to_dbus_queue(u);
e537352b
LP		 1157}
1158
1159static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1160 Mount *m = MOUNT(u);
1161
1162 assert(m);
1163 assert(elapsed == 1);
1164 assert(w == &m->timer_watch);
1165
1166 switch (m->state) {
1167
1168 case MOUNT_MOUNTING:
1169 case MOUNT_MOUNTING_DONE:
9e2f7c11 1170 log_warning("%s mounting timed out. Stopping.", u->meta.id);
e537352b
LP		 1171 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1172 break;
1173
1174 case MOUNT_REMOUNTING:
9e2f7c11 1175 log_warning("%s remounting timed out. Stopping.", u->meta.id);
e2f3b44c
LP		 1176 m->reload_failure = true;
1177 mount_enter_mounted(m, true);
e537352b
LP		 1178 break;
1179
1180 case MOUNT_UNMOUNTING:
9e2f7c11 1181 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
e537352b
LP		 1182 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1183 break;
1184
1185 case MOUNT_MOUNTING_SIGTERM:
ba035df2
LP		 1186 if (m->exec_context.send_sigkill) {
1187 log_warning("%s mounting timed out. Killing.", u->meta.id);
1188 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1189 } else {
1190 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1191
1192 if (m->from_proc_self_mountinfo)
1193 mount_enter_mounted(m, false);
1194 else
1195 mount_enter_dead(m, false);
1196 }
e537352b
LP		 1197 break;
1198
1199 case MOUNT_REMOUNTING_SIGTERM:
ba035df2
LP		 1200 if (m->exec_context.send_sigkill) {
1201 log_warning("%s remounting timed out. Killing.", u->meta.id);
1202 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1203 } else {
1204 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1205
1206 if (m->from_proc_self_mountinfo)
1207 mount_enter_mounted(m, false);
1208 else
1209 mount_enter_dead(m, false);
1210 }
e537352b
LP		 1211 break;
1212
1213 case MOUNT_UNMOUNTING_SIGTERM:
ba035df2
LP		 1214 if (m->exec_context.send_sigkill) {
1215 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1216 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1217 } else {
1218 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1219
1220 if (m->from_proc_self_mountinfo)
1221 mount_enter_mounted(m, false);
1222 else
1223 mount_enter_dead(m, false);
1224 }
e537352b
LP		 1225 break;
1226
1227 case MOUNT_MOUNTING_SIGKILL:
1228 case MOUNT_REMOUNTING_SIGKILL:
1229 case MOUNT_UNMOUNTING_SIGKILL:
9e2f7c11 1230 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
e537352b
LP		 1231
1232 if (m->from_proc_self_mountinfo)
1233 mount_enter_mounted(m, false);
1234 else
1235 mount_enter_dead(m, false);
1236 break;
1237
1238 default:
1239 assert_not_reached("Timeout at wrong time.");
1240 }
1241}
1242
1243static int mount_add_one(
1244 Manager *m,
1245 const char *what,
1246 const char *where,
1247 const char *options,
1248 const char *fstype,
9fff8a1f 1249 int passno,
e537352b
LP		 1250 bool from_proc_self_mountinfo,
1251 bool set_flags) {
b08d03ff
LP		 1252 int r;
1253 Unit *u;
1254 bool delete;
e537352b 1255 char *e, *w = NULL, *o = NULL, *f = NULL;
4e85aff4 1256 MountParameters *p;
b08d03ff 1257
f50e0a01 1258 assert(m);
b08d03ff
LP		 1259 assert(what);
1260 assert(where);
e537352b
LP		 1261 assert(options);
1262 assert(fstype);
1263
1264 assert(!set_flags || from_proc_self_mountinfo);
1265
1266 /* Ignore API mount points. They should never be referenced in
1267 * dependencies ever. */
1268 if (mount_point_is_api(where))
1269 return 0;
57f2a956
KS		 1270 if (mount_point_ignore(where))
1271 return 0;
b08d03ff 1272
8d567588
LP		 1273 if (streq(fstype, "autofs"))
1274 return 0;
1275
4e85aff4
LP		 1276 /* probably some kind of swap, ignore */
1277 if (!is_path(where))
b08d03ff
LP		 1278 return 0;
1279
a16e1123 1280 if (!(e = unit_name_from_path(where, ".mount")))
b08d03ff
LP		 1281 return -ENOMEM;
1282
1283 if (!(u = manager_get_unit(m, e))) {
1284 delete = true;
1285
1286 if (!(u = unit_new(m))) {
1287 free(e);
1288 return -ENOMEM;
1289 }
1290
1291 r = unit_add_name(u, e);
1292 free(e);
1293
1294 if (r < 0)
1295 goto fail;
1296
e537352b 1297 if (!(MOUNT(u)->where = strdup(where))) {
07b0b134
ML		 1298 r = -ENOMEM;
1299 goto fail;
1300 }
f50e0a01 1301
f94ea366 1302 unit_add_to_load_queue(u);
b08d03ff
LP		 1303 } else {
1304 delete = false;
1305 free(e);
1306 }
1307
e537352b
LP		 1308 if (!(w = strdup(what)) ||
1309 !(o = strdup(options)) ||
1310 !(f = strdup(fstype))) {
1311 r = -ENOMEM;
1312 goto fail;
1313 }
1314
1315 if (from_proc_self_mountinfo) {
4e85aff4 1316 p = &MOUNT(u)->parameters_proc_self_mountinfo;
e537352b
LP		 1317
1318 if (set_flags) {
1319 MOUNT(u)->is_mounted = true;
1320 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
4e85aff4 1321 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
e537352b 1322 }
ef734fd6 1323
f50e0a01 1324 MOUNT(u)->from_proc_self_mountinfo = true;
ef734fd6 1325 } else {
4e85aff4 1326 p = &MOUNT(u)->parameters_etc_fstab;
f50e0a01 1327 MOUNT(u)->from_etc_fstab = true;
ef734fd6 1328 }
f50e0a01 1329
4e85aff4
LP		 1330 free(p->what);
1331 p->what = w;
b08d03ff 1332
4e85aff4
LP		 1333 free(p->options);
1334 p->options = o;
e537352b 1335
4e85aff4
LP		 1336 free(p->fstype);
1337 p->fstype = f;
b08d03ff 1338
9fff8a1f
LP		 1339 p->passno = passno;
1340
c1e1601e
LP		 1341 unit_add_to_dbus_queue(u);
1342
b08d03ff
LP		 1343 return 0;
1344
1345fail:
e537352b
LP		 1346 free(w);
1347 free(o);
1348 free(f);
1349
b08d03ff
LP		 1350 if (delete && u)
1351 unit_free(u);
1352
4e85aff4 1353 return r;
b08d03ff
LP		 1354}
1355
07b0b134
ML		 1356static int mount_find_pri(char *options) {
1357 char *end, *pri;
1358 unsigned long r;
1359
1360 if (!(pri = mount_test_option(options, "pri=")))
1361 return 0;
1362
1363 pri += 4;
1364
1365 errno = 0;
1366 r = strtoul(pri, &end, 10);
1367
1368 if (errno != 0)
1369 return -errno;
1370
1371 if (end == pri || (*end != ',' && *end != 0))
1372 return -EINVAL;
1373
1374 return (int) r;
1375}
1376
e537352b 1377static int mount_load_etc_fstab(Manager *m) {
b08d03ff 1378 FILE *f;
60b912f6 1379 int r = 0;
b08d03ff
LP		 1380 struct mntent* me;
1381
1382 assert(m);
1383
1384 errno = 0;
1385 if (!(f = setmntent("/etc/fstab", "r")))
1386 return -errno;
1387
1388 while ((me = getmntent(f))) {
1389 char *where, *what;
60b912f6 1390 int k;
b08d03ff
LP		 1391
1392 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1393 r = -ENOMEM;
1394 goto finish;
1395 }
1396
1397 if (!(where = strdup(me->mnt_dir))) {
1398 free(what);
1399 r = -ENOMEM;
1400 goto finish;
1401 }
1402
1403 if (what[0] == '/')
1404 path_kill_slashes(what);
1405
1406 if (where[0] == '/')
1407 path_kill_slashes(where);
1408
07b0b134
ML		 1409 if (streq(me->mnt_type, "swap")) {
1410 int pri;
1411
1412 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
60b912f6 1413 k = pri;
07b0b134 1414 else
60b912f6 1415 k = swap_add_one(m,
07b0b134 1416 what,
60b912f6 1417 NULL,
07b0b134 1418 pri,
4e85aff4 1419 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
173a8d04 1420 !!mount_test_option(me->mnt_opts, "nofail"),
4e85aff4 1421 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
07b0b134
ML		 1422 false);
1423 } else
9fff8a1f 1424 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
07b0b134 1425
b08d03ff
LP		 1426 free(what);
1427 free(where);
1428
1429 if (r < 0)
60b912f6 1430 r = k;
b08d03ff
LP		 1431 }
1432
b08d03ff
LP		 1433finish:
1434
1435 endmntent(f);
1436 return r;
1437}
1438
ef734fd6 1439static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
60b912f6 1440 int r = 0;
1ddff895 1441 unsigned i;
a2e0f3d3 1442 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
b08d03ff
LP		 1443
1444 assert(m);
1445
ef734fd6 1446 rewind(m->proc_self_mountinfo);
b08d03ff 1447
1ddff895 1448 for (i = 1;; i++) {
b08d03ff 1449 int k;
e537352b 1450
a2e0f3d3 1451 device = path = options = options2 = fstype = d = p = o = NULL;
b08d03ff 1452
ef734fd6 1453 if ((k = fscanf(m->proc_self_mountinfo,
b08d03ff
LP		 1454 "%*s " /* (1) mount id */
1455 "%*s " /* (2) parent id */
1456 "%*s " /* (3) major:minor */
1457 "%*s " /* (4) root */
1458 "%ms " /* (5) mount point */
e537352b 1459 "%ms" /* (6) mount options */
b08d03ff 1460 "%*[^-]" /* (7) optional fields */
c899f8c6 1461 "- " /* (8) separator */
e537352b 1462 "%ms " /* (9) file system type */
ef734fd6 1463 "%ms" /* (10) mount source */
a2e0f3d3 1464 "%ms" /* (11) mount options 2 */
ef734fd6 1465 "%*[^\n]", /* some rubbish at the end */
b08d03ff 1466 &path,
e537352b
LP		 1467 &options,
1468 &fstype,
a2e0f3d3
LP		 1469 &device,
1470 &options2)) != 5) {
b08d03ff 1471
ef734fd6
LP		 1472 if (k == EOF)
1473 break;
b08d03ff 1474
1ddff895
FF		 1475 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1476 goto clean_up;
b08d03ff
LP		 1477 }
1478
a2e0f3d3
LP		 1479 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1480 r = -ENOMEM;
1481 goto finish;
1482 }
1483
e537352b
LP		 1484 if (!(d = cunescape(device)) ||
1485 !(p = cunescape(path))) {
1486 r = -ENOMEM;
1487 goto finish;
b08d03ff 1488 }
b08d03ff 1489
9fff8a1f 1490 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
60b912f6 1491 r = k;
b08d03ff 1492
1ddff895 1493clean_up:
e537352b
LP		 1494 free(device);
1495 free(path);
1496 free(options);
a2e0f3d3 1497 free(options2);
e537352b 1498 free(fstype);
b08d03ff
LP		 1499 free(d);
1500 free(p);
a2e0f3d3 1501 free(o);
b08d03ff
LP		 1502 }
1503
e537352b
LP		 1504finish:
1505 free(device);
1506 free(path);
1507 free(options);
a2e0f3d3 1508 free(options2);
e537352b
LP		 1509 free(fstype);
1510 free(d);
1511 free(p);
a2e0f3d3 1512 free(o);
e537352b
LP		 1513
1514 return r;
1515}
1516
1517static void mount_shutdown(Manager *m) {
1518 assert(m);
1519
a16e1123 1520 if (m->proc_self_mountinfo) {
e537352b 1521 fclose(m->proc_self_mountinfo);
a16e1123
LP		 1522 m->proc_self_mountinfo = NULL;
1523 }
b08d03ff
LP		 1524}
1525
1526static int mount_enumerate(Manager *m) {
1527 int r;
ef734fd6 1528 struct epoll_event ev;
b08d03ff
LP		 1529 assert(m);
1530
a16e1123
LP		 1531 if (!m->proc_self_mountinfo) {
1532 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1533 return -errno;
ef734fd6 1534
a16e1123
LP		 1535 m->mount_watch.type = WATCH_MOUNT;
1536 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
ef734fd6 1537
a16e1123 1538 zero(ev);
4e434314 1539 ev.events = EPOLLPRI;
a16e1123 1540 ev.data.ptr = &m->mount_watch;
ef734fd6 1541
a16e1123
LP		 1542 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1543 return -errno;
1544 }
ef734fd6 1545
e537352b 1546 if ((r = mount_load_etc_fstab(m)) < 0)
b08d03ff
LP		 1547 goto fail;
1548
ef734fd6 1549 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
b08d03ff
LP		 1550 goto fail;
1551
1552 return 0;
1553
1554fail:
1555 mount_shutdown(m);
1556 return r;
5cb5a6ff
LP		 1557}
1558
ef734fd6
LP		 1559void mount_fd_event(Manager *m, int events) {
1560 Meta *meta;
1561 int r;
1562
1563 assert(m);
4e434314 1564 assert(events & EPOLLPRI);
ef734fd6
LP		 1565
1566 /* The manager calls this for every fd event happening on the
1567 * /proc/self/mountinfo file, which informs us about mounting
1568 * table changes */
1569
1570 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
e364ad06 1571 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
e537352b
LP		 1572
1573 /* Reset flags, just in case, for later calls */
1574 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1575 Mount *mount = (Mount*) meta;
1576
1577 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1578 }
1579
ef734fd6
LP		 1580 return;
1581 }
1582
1583 manager_dispatch_load_queue(m);
1584
1585 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1586 Mount *mount = (Mount*) meta;
1587
e537352b
LP		 1588 if (!mount->is_mounted) {
1589 /* This has just been unmounted. */
1590
ef734fd6 1591 mount->from_proc_self_mountinfo = false;
e537352b
LP		 1592
1593 switch (mount->state) {
1594
1595 case MOUNT_MOUNTED:
1596 mount_enter_dead(mount, true);
1597 break;
1598
1599 default:
1600 mount_set_state(mount, mount->state);
1601 break;
1602
1603 }
1604
1605 } else if (mount->just_mounted || mount->just_changed) {
1606
60b912f6 1607 /* New or changed mount entry */
e537352b
LP		 1608
1609 switch (mount->state) {
1610
1611 case MOUNT_DEAD:
fdf20a31 1612 case MOUNT_FAILED:
e537352b
LP		 1613 mount_enter_mounted(mount, true);
1614 break;
1615
1616 case MOUNT_MOUNTING:
8d567588 1617 mount_enter_mounting_done(mount);
e537352b
LP		 1618 break;
1619
1620 default:
1621 /* Nothing really changed, but let's
1622 * issue an notification call
1623 * nonetheless, in case somebody is
1624 * waiting for this. (e.g. file system
1625 * ro/rw remounts.) */
1626 mount_set_state(mount, mount->state);
1627 break;
1628 }
1629 }
1630
1631 /* Reset the flags for later calls */
1632 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1633 }
1634}
1635
fdf20a31 1636static void mount_reset_failed(Unit *u) {
5632e374
LP		 1637 Mount *m = MOUNT(u);
1638
1639 assert(m);
1640
fdf20a31 1641 if (m->state == MOUNT_FAILED)
5632e374
LP		 1642 mount_set_state(m, MOUNT_DEAD);
1643
1644 m->failure = false;
1645}
1646
8a0867d6
LP		 1647static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1648 Mount *m = MOUNT(u);
1649 int r = 0;
1650 Set *pid_set = NULL;
1651
1652 assert(m);
1653
1654 if (who == KILL_MAIN) {
1655 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1656 return -EINVAL;
1657 }
1658
1659 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1660 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1661 return -ENOENT;
1662 }
1663
1664 if (m->control_pid > 0)
1665 if (kill(mode == KILL_PROCESS_GROUP ? -m->control_pid : m->control_pid, signo) < 0)
1666 r = -errno;
1667
1668 if (mode == KILL_CONTROL_GROUP) {
1669 int q;
1670
1671 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1672 return -ENOMEM;
1673
1674 /* Exclude the control pid from being killed via the cgroup */
1675 if (m->control_pid > 0)
1676 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1677 r = q;
1678 goto finish;
1679 }
1680
430c18ed 1681 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
8a0867d6
LP		 1682 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1683 r = q;
1684 }
1685
1686finish:
1687 if (pid_set)
1688 set_free(pid_set);
1689
1690 return r;
1691}
1692
a16e1123
LP		 1693static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1694 [MOUNT_DEAD] = "dead",
1695 [MOUNT_MOUNTING] = "mounting",
1696 [MOUNT_MOUNTING_DONE] = "mounting-done",
1697 [MOUNT_MOUNTED] = "mounted",
1698 [MOUNT_REMOUNTING] = "remounting",
1699 [MOUNT_UNMOUNTING] = "unmounting",
1700 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1701 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1702 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1703 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1704 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1705 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
fdf20a31 1706 [MOUNT_FAILED] = "failed"
a16e1123
LP		 1707};
1708
1709DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1710
1711static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1712 [MOUNT_EXEC_MOUNT] = "ExecMount",
1713 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1714 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1715};
1716
1717DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1718
87f0e418 1719const UnitVTable mount_vtable = {
5cb5a6ff
LP		 1720 .suffix = ".mount",
1721
e537352b 1722 .no_alias = true,
9e2f7c11 1723 .no_instances = true,
c497c7a9 1724 .no_isolate = true,
9e58ff9c 1725 .show_status = true,
e537352b
LP		 1726
1727 .init = mount_init,
1728 .load = mount_load,
034c6ed7 1729 .done = mount_done,
e537352b 1730
f50e0a01
LP		 1731 .coldplug = mount_coldplug,
1732
034c6ed7 1733 .dump = mount_dump,
5cb5a6ff 1734
e537352b
LP		 1735 .start = mount_start,
1736 .stop = mount_stop,
1737 .reload = mount_reload,
1738
8a0867d6
LP		 1739 .kill = mount_kill,
1740
a16e1123
LP		 1741 .serialize = mount_serialize,
1742 .deserialize_item = mount_deserialize_item,
1743
f50e0a01 1744 .active_state = mount_active_state,
10a94420 1745 .sub_state_to_string = mount_sub_state_to_string,
b08d03ff 1746
701cc384
LP		 1747 .check_gc = mount_check_gc,
1748
e537352b
LP		 1749 .sigchld_event = mount_sigchld_event,
1750 .timer_event = mount_timer_event,
1751
fdf20a31 1752 .reset_failed = mount_reset_failed,
5632e374 1753
c4e2ceae 1754 .bus_interface = "org.freedesktop.systemd1.Mount",
4139c1b2 1755 .bus_message_handler = bus_mount_message_handler,
c4e2ceae 1756 .bus_invalidating_properties = bus_mount_invalidating_properties,
4139c1b2 1757
f50e0a01
LP		 1758 .enumerate = mount_enumerate,
1759 .shutdown = mount_shutdown
5cb5a6ff 1760};
Unnamed repository; edit this file 'description' to name the repository.