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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"
5cb5a6ff 38
f50e0a01
LP		 39static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
40 [MOUNT_DEAD] = UNIT_INACTIVE,
41 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
e537352b 42 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
f50e0a01 43 [MOUNT_MOUNTED] = UNIT_ACTIVE,
032ff4af 44 [MOUNT_REMOUNTING] = UNIT_RELOADING,
f50e0a01 45 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
e537352b
LP		 46 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
47 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
032ff4af
LP		 48 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
49 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
e537352b
LP		 50 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
51 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
fdf20a31 52 [MOUNT_FAILED] = UNIT_FAILED
f50e0a01 53};
5cb5a6ff 54
a16e1123
LP		 55static void mount_init(Unit *u) {
56 Mount *m = MOUNT(u);
5cb5a6ff 57
a16e1123
LP		 58 assert(u);
59 assert(u->meta.load_state == UNIT_STUB);
60
61 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
3e5235b0
LP		 62 m->directory_mode = 0755;
63
c3686083
LP		 64 exec_context_init(&m->exec_context);
65
a16e1123
LP		 66 /* We need to make sure that /bin/mount is always called in
67 * the same process group as us, so that the autofs kernel
68 * side doesn't send us another mount request while we are
69 * already trying to comply its last one. */
74922904 70 m->exec_context.same_pgrp = true;
8d567588 71
a16e1123
LP		 72 m->timer_watch.type = WATCH_INVALID;
73
74 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
8d567588
LP		 75}
76
a16e1123 77static void mount_unwatch_control_pid(Mount *m) {
5e94833f
LP		 78 assert(m);
79
80 if (m->control_pid <= 0)
81 return;
82
83 unit_unwatch_pid(UNIT(m), m->control_pid);
84 m->control_pid = 0;
85}
86
e537352b
LP		 87static void mount_parameters_done(MountParameters *p) {
88 assert(p);
89
90 free(p->what);
91 free(p->options);
92 free(p->fstype);
93
94 p->what = p->options = p->fstype = NULL;
95}
96
87f0e418 97static void mount_done(Unit *u) {
ef734fd6 98 Mount *m = MOUNT(u);
034c6ed7 99
ef734fd6 100 assert(m);
034c6ed7 101
e537352b
LP		 102 free(m->where);
103 m->where = NULL;
f50e0a01 104
e537352b
LP		 105 mount_parameters_done(&m->parameters_etc_fstab);
106 mount_parameters_done(&m->parameters_proc_self_mountinfo);
107 mount_parameters_done(&m->parameters_fragment);
ef734fd6 108
e537352b
LP		 109 exec_context_done(&m->exec_context);
110 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
111 m->control_command = NULL;
f50e0a01 112
a16e1123 113 mount_unwatch_control_pid(m);
f50e0a01 114
e537352b 115 unit_unwatch_timer(u, &m->timer_watch);
f50e0a01
LP		 116}
117
6e2ef85b
LP		 118static int mount_add_mount_links(Mount *m) {
119 Meta *other;
b08d03ff 120 int r;
5c78d8e2 121 MountParameters *pm;
b08d03ff 122
6e2ef85b 123 assert(m);
b08d03ff 124
5c78d8e2
LP		 125 if (m->from_fragment)
126 pm = &m->parameters_fragment;
127 else if (m->from_etc_fstab)
128 pm = &m->parameters_etc_fstab;
129 else
130 pm = NULL;
131
6e2ef85b
LP		 132 /* Adds in links to other mount points that might lie below or
133 * above us in the hierarchy */
e537352b 134
6e2ef85b
LP		 135 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
136 Mount *n = (Mount*) other;
5c78d8e2 137 MountParameters *pn;
07b0b134 138
6e2ef85b
LP		 139 if (n == m)
140 continue;
b08d03ff 141
6e2ef85b
LP		 142 if (n->meta.load_state != UNIT_LOADED)
143 continue;
b08d03ff 144
5c78d8e2
LP		 145 if (n->from_fragment)
146 pn = &n->parameters_fragment;
147 else if (n->from_etc_fstab)
148 pn = &n->parameters_etc_fstab;
149 else
150 pn = NULL;
151
6e2ef85b 152 if (path_startswith(m->where, n->where)) {
b08d03ff 153
6e2ef85b
LP		 154 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
155 return r;
b08d03ff 156
6e2ef85b
LP		 157 if (n->from_etc_fstab || n->from_fragment)
158 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
159 return r;
b08d03ff 160
6e2ef85b 161 } else if (path_startswith(n->where, m->where)) {
b08d03ff 162
5c78d8e2
LP		 163 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
164 return r;
165
166 if (m->from_etc_fstab || m->from_fragment)
167 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
168 return r;
169
170 } else if (pm && path_startswith(pm->what, n->where)) {
171
172 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
6e2ef85b
LP		 173 return r;
174
175 if (m->from_etc_fstab || m->from_fragment)
5c78d8e2
LP		 176 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
177 return r;
178
179 } else if (pn && path_startswith(pn->what, m->where)) {
180
181 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
182 return r;
183
184 if (n->from_etc_fstab || n->from_fragment)
6e2ef85b
LP		 185 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
186 return r;
187 }
188 }
b08d03ff
LP		 189
190 return 0;
191}
192
6e2ef85b 193static int mount_add_swap_links(Mount *m) {
ef734fd6 194 Meta *other;
b08d03ff
LP		 195 int r;
196
6e2ef85b 197 assert(m);
b08d03ff 198
6e2ef85b
LP		 199 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
200 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
201 return r;
b08d03ff 202
6e2ef85b
LP		 203 return 0;
204}
b08d03ff 205
01f78473
LP		 206static int mount_add_path_links(Mount *m) {
207 Meta *other;
208 int r;
209
210 assert(m);
211
212 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
213 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
214 return r;
215
216 return 0;
217}
218
6e2ef85b
LP		 219static int mount_add_automount_links(Mount *m) {
220 Meta *other;
221 int r;
e537352b 222
6e2ef85b 223 assert(m);
b08d03ff 224
6e2ef85b
LP		 225 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
226 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
227 return r;
b08d03ff 228
6e2ef85b
LP		 229 return 0;
230}
b08d03ff 231
6e2ef85b
LP		 232static int mount_add_socket_links(Mount *m) {
233 Meta *other;
234 int r;
b08d03ff 235
6e2ef85b 236 assert(m);
b08d03ff 237
6e2ef85b
LP		 238 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
239 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
240 return r;
b08d03ff
LP		 241
242 return 0;
243}
244
07b0b134 245static char* mount_test_option(const char *haystack, const char *needle) {
e537352b
LP		 246 struct mntent me;
247
248 assert(needle);
249
250 /* Like glibc's hasmntopt(), but works on a string, not a
251 * struct mntent */
252
253 if (!haystack)
254 return false;
255
256 zero(me);
257 me.mnt_opts = (char*) haystack;
258
07b0b134 259 return hasmntopt(&me, needle);
e537352b
LP		 260}
261
262static int mount_add_target_links(Mount *m) {
a55da3cd 263 const char *target, *after = NULL;
e537352b 264 MountParameters *p;
a16e1123 265 Unit *tu;
e537352b 266 int r;
307e85ef 267 bool noauto, handle, automount, user;
e537352b
LP		 268
269 assert(m);
270
271 if (m->from_fragment)
272 p = &m->parameters_fragment;
273 else if (m->from_etc_fstab)
274 p = &m->parameters_etc_fstab;
275 else
276 return 0;
277
07b0b134 278 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
307e85ef 279 user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users");
d3689161
LP		 280 handle = !!mount_test_option(p->options, "comment=systemd.mount") ||
281 m->meta.manager->mount_auto;
07b0b134 282 automount = !!mount_test_option(p->options, "comment=systemd.automount");
e537352b 283
e537352b 284 if (mount_test_option(p->options, "_netdev") ||
40b8a332 285 (p->fstype && fstype_is_network(p->fstype))) {
e537352b 286 target = SPECIAL_REMOTE_FS_TARGET;
a55da3cd
LP		 287
288 if (m->meta.manager->running_as == MANAGER_SYSTEM)
289 after = SPECIAL_NETWORK_TARGET;
290 } else
e537352b
LP		 291 target = SPECIAL_LOCAL_FS_TARGET;
292
398ef8ba 293 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
e537352b
LP		 294 return r;
295
a55da3cd
LP		 296 if (after)
297 if ((r = unit_add_dependency_by_name(tu, UNIT_AFTER, after, NULL, true)) < 0)
298 return r;
299
a3d4e06d 300 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
a16e1123
LP		 301 Unit *am;
302
303 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
9fcc065a 304 return r;
e537352b 305
2c966c03 306 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
a16e1123
LP		 307 } else {
308
81bf310e
LP		 309 /* Automatically add mount points that aren't natively
310 * configured to local-fs.target */
311 if (!noauto &&
312 handle &&
313 !m->from_fragment)
a3d4e06d 314 if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
307e85ef
LP		 315 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
316 return r;
a16e1123 317
701cc384 318 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
a16e1123 319 }
e537352b
LP		 320}
321
5c78d8e2
LP		 322static bool mount_is_bind(MountParameters *p) {
323 assert(p);
324
325 if (p->fstype && streq(p->fstype, "bind"))
326 return true;
327
328 if (mount_test_option(p->options, "bind"))
329 return true;
330
331 return false;
332}
333
173a8d04
LP		 334static int mount_add_device_links(Mount *m) {
335 MountParameters *p;
9fff8a1f 336 int r;
173a8d04
LP		 337
338 assert(m);
339
340 if (m->from_fragment)
341 p = &m->parameters_fragment;
342 else if (m->from_etc_fstab)
343 p = &m->parameters_etc_fstab;
344 else
345 return 0;
346
9fff8a1f 347 if (!p->what)
173a8d04 348 return 0;
5c78d8e2 349
9fff8a1f
LP		 350 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
351 bool nofail, noauto;
173a8d04 352
9fff8a1f
LP		 353 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
354 nofail = !!mount_test_option(p->options, "nofail");
355
356 if ((r = unit_add_node_link(UNIT(m), p->what,
357 !noauto && nofail &&
358 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
359 return r;
360 }
361
491ad5dc 362 if (p->passno > 0 &&
b65a25f2
LP		 363 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
364 !path_equal(m->where, "/")) {
9fff8a1f
LP		 365 char *name;
366 Unit *fsck;
367 /* Let's add in the fsck service */
173a8d04 368
a9e1f5ec 369 /* aka SPECIAL_FSCK_SERVICE */
9fff8a1f
LP		 370 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
371 return -ENOMEM;
372
373 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
374 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
375 free(name);
376 return r;
377 }
378
379 free(name);
380
381 SERVICE(fsck)->fsck_passno = p->passno;
382
383 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_WANTS, fsck, true)) < 0)
384 return r;
385 }
386
387 return 0;
173a8d04
LP		 388}
389
2edd4434
LP		 390static int mount_add_default_dependencies(Mount *m) {
391 int r;
392
393 assert(m);
394
75d287d3
LP		 395 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
396 !path_equal(m->where, "/")) {
2edd4434 397
a9e1f5ec 398 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_BEFORE, SPECIAL_QUOTACHECK_TARGET, NULL, true)) < 0)
2edd4434
LP		 399 return r;
400
69dd2852 401 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
75d287d3 402 return r;
2edd4434
LP		 403 }
404
405 return 0;
406}
407
8d567588
LP		 408static int mount_verify(Mount *m) {
409 bool b;
410 char *e;
411 assert(m);
412
8cbef760 413 if (m->meta.load_state != UNIT_LOADED)
8d567588
LP		 414 return 0;
415
8cbef760
LP		 416 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
417 return -ENOENT;
418
a16e1123 419 if (!(e = unit_name_from_path(m->where, ".mount")))
8d567588
LP		 420 return -ENOMEM;
421
422 b = unit_has_name(UNIT(m), e);
423 free(e);
424
425 if (!b) {
4cd1fbcc 426 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
8d567588
LP		 427 return -EINVAL;
428 }
429
4e85aff4 430 if (m->meta.fragment_path && !m->parameters_fragment.what) {
4cd1fbcc 431 log_error("%s's What setting is missing. Refusing.", m->meta.id);
4e85aff4
LP		 432 return -EBADMSG;
433 }
434
2e22afe9 435 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
4d0e5dbd
LP		 436 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
437 return -EINVAL;
438 }
439
8d567588
LP		 440 return 0;
441}
442
e537352b
LP		 443static int mount_load(Unit *u) {
444 Mount *m = MOUNT(u);
445 int r;
446
447 assert(u);
448 assert(u->meta.load_state == UNIT_STUB);
449
450 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
451 return r;
452
453 /* This is a new unit? Then let's add in some extras */
454 if (u->meta.load_state == UNIT_LOADED) {
4e85aff4
LP		 455 if (m->meta.fragment_path)
456 m->from_fragment = true;
e537352b 457
a16e1123
LP		 458 if (!m->where)
459 if (!(m->where = unit_name_to_path(u->meta.id)))
460 return -ENOMEM;
461
462 path_kill_slashes(m->where);
463
4e85aff4
LP		 464 if (!m->meta.description)
465 if ((r = unit_set_description(u, m->where)) < 0)
466 return r;
e537352b 467
173a8d04
LP		 468 if ((r = mount_add_device_links(m)) < 0)
469 return r;
6e2ef85b
LP		 470
471 if ((r = mount_add_mount_links(m)) < 0)
472 return r;
473
474 if ((r = mount_add_socket_links(m)) < 0)
475 return r;
476
477 if ((r = mount_add_swap_links(m)) < 0)
e537352b
LP		 478 return r;
479
01f78473
LP		 480 if ((r = mount_add_path_links(m)) < 0)
481 return r;
482
6e2ef85b 483 if ((r = mount_add_automount_links(m)) < 0)
e537352b
LP		 484 return r;
485
6e2ef85b 486 if ((r = mount_add_target_links(m)) < 0)
e537352b
LP		 487 return r;
488
489 if ((r = unit_add_default_cgroup(u)) < 0)
490 return r;
4e67ddd6 491
2edd4434
LP		 492 if (m->meta.default_dependencies)
493 if ((r = mount_add_default_dependencies(m)) < 0)
4e67ddd6 494 return r;
e537352b
LP		 495 }
496
8d567588 497 return mount_verify(m);
e537352b
LP		 498}
499
a16e1123
LP		 500static int mount_notify_automount(Mount *m, int status) {
501 Unit *p;
502 int r;
503
504 assert(m);
505
506 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
507 return r == -ENOENT ? 0 : r;
508
509 return automount_send_ready(AUTOMOUNT(p), status);
510}
511
e537352b
LP		 512static void mount_set_state(Mount *m, MountState state) {
513 MountState old_state;
514 assert(m);
515
516 old_state = m->state;
517 m->state = state;
518
519 if (state != MOUNT_MOUNTING &&
520 state != MOUNT_MOUNTING_DONE &&
521 state != MOUNT_REMOUNTING &&
522 state != MOUNT_UNMOUNTING &&
523 state != MOUNT_MOUNTING_SIGTERM &&
524 state != MOUNT_MOUNTING_SIGKILL &&
525 state != MOUNT_UNMOUNTING_SIGTERM &&
526 state != MOUNT_UNMOUNTING_SIGKILL &&
527 state != MOUNT_REMOUNTING_SIGTERM &&
528 state != MOUNT_REMOUNTING_SIGKILL) {
529 unit_unwatch_timer(UNIT(m), &m->timer_watch);
a16e1123 530 mount_unwatch_control_pid(m);
e537352b 531 m->control_command = NULL;
a16e1123 532 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
e537352b
LP		 533 }
534
8d567588
LP		 535 if (state == MOUNT_MOUNTED ||
536 state == MOUNT_REMOUNTING)
537 mount_notify_automount(m, 0);
538 else if (state == MOUNT_DEAD ||
539 state == MOUNT_UNMOUNTING ||
540 state == MOUNT_MOUNTING_SIGTERM ||
541 state == MOUNT_MOUNTING_SIGKILL ||
542 state == MOUNT_REMOUNTING_SIGTERM ||
543 state == MOUNT_REMOUNTING_SIGKILL ||
544 state == MOUNT_UNMOUNTING_SIGTERM ||
545 state == MOUNT_UNMOUNTING_SIGKILL ||
fdf20a31 546 state == MOUNT_FAILED)
8d567588
LP		 547 mount_notify_automount(m, -ENODEV);
548
e537352b 549 if (state != old_state)
40d50879 550 log_debug("%s changed %s -> %s",
4cd1fbcc 551 m->meta.id,
a16e1123
LP		 552 mount_state_to_string(old_state),
553 mount_state_to_string(state));
e537352b
LP		 554
555 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
556}
557
558static int mount_coldplug(Unit *u) {
559 Mount *m = MOUNT(u);
a16e1123
LP		 560 MountState new_state = MOUNT_DEAD;
561 int r;
e537352b
LP		 562
563 assert(m);
564 assert(m->state == MOUNT_DEAD);
565
a16e1123
LP		 566 if (m->deserialized_state != m->state)
567 new_state = m->deserialized_state;
568 else if (m->from_proc_self_mountinfo)
569 new_state = MOUNT_MOUNTED;
e537352b 570
a16e1123 571 if (new_state != m->state) {
e537352b 572
a16e1123
LP		 573 if (new_state == MOUNT_MOUNTING ||
574 new_state == MOUNT_MOUNTING_DONE ||
575 new_state == MOUNT_REMOUNTING ||
576 new_state == MOUNT_UNMOUNTING ||
577 new_state == MOUNT_MOUNTING_SIGTERM ||
578 new_state == MOUNT_MOUNTING_SIGKILL ||
579 new_state == MOUNT_UNMOUNTING_SIGTERM ||
580 new_state == MOUNT_UNMOUNTING_SIGKILL ||
581 new_state == MOUNT_REMOUNTING_SIGTERM ||
582 new_state == MOUNT_REMOUNTING_SIGKILL) {
e537352b 583
a16e1123
LP		 584 if (m->control_pid <= 0)
585 return -EBADMSG;
e537352b 586
a16e1123
LP		 587 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
588 return r;
e537352b 589
a16e1123
LP		 590 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
591 return r;
592 }
e537352b 593
a16e1123
LP		 594 mount_set_state(m, new_state);
595 }
e537352b
LP		 596
597 return 0;
e537352b
LP		 598}
599
600static void mount_dump(Unit *u, FILE *f, const char *prefix) {
601 Mount *m = MOUNT(u);
602 MountParameters *p;
603
604 assert(m);
605 assert(f);
606
607 if (m->from_proc_self_mountinfo)
608 p = &m->parameters_proc_self_mountinfo;
609 else if (m->from_fragment)
610 p = &m->parameters_fragment;
611 else
612 p = &m->parameters_etc_fstab;
613
614 fprintf(f,
615 "%sMount State: %s\n"
616 "%sWhere: %s\n"
617 "%sWhat: %s\n"
618 "%sFile System Type: %s\n"
619 "%sOptions: %s\n"
620 "%sFrom /etc/fstab: %s\n"
621 "%sFrom /proc/self/mountinfo: %s\n"
622 "%sFrom fragment: %s\n"
3e5235b0 623 "%sDirectoryMode: %04o\n",
a16e1123 624 prefix, mount_state_to_string(m->state),
e537352b
LP		 625 prefix, m->where,
626 prefix, strna(p->what),
627 prefix, strna(p->fstype),
628 prefix, strna(p->options),
629 prefix, yes_no(m->from_etc_fstab),
630 prefix, yes_no(m->from_proc_self_mountinfo),
631 prefix, yes_no(m->from_fragment),
3e5235b0 632 prefix, m->directory_mode);
e537352b
LP		 633
634 if (m->control_pid > 0)
635 fprintf(f,
bb00e604
LP		 636 "%sControl PID: %lu\n",
637 prefix, (unsigned long) m->control_pid);
e537352b
LP		 638
639 exec_context_dump(&m->exec_context, f, prefix);
640}
641
a16e1123
LP		 642static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
643 pid_t pid;
644 int r;
645
646 assert(m);
647 assert(c);
648 assert(_pid);
649
650 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
651 goto fail;
652
653 if ((r = exec_spawn(c,
654 NULL,
655 &m->exec_context,
656 NULL, 0,
1137a57c 657 m->meta.manager->environment,
a16e1123
LP		 658 true,
659 true,
1e3ad081 660 true,
c3686083 661 m->meta.manager->confirm_spawn,
4cd1fbcc 662 m->meta.cgroup_bondings,
a16e1123
LP		 663 &pid)) < 0)
664 goto fail;
665
666 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
667 /* FIXME: we need to do something here */
668 goto fail;
669
670 *_pid = pid;
671
672 return 0;
673
674fail:
675 unit_unwatch_timer(UNIT(m), &m->timer_watch);
676
677 return r;
678}
679
e537352b
LP		 680static void mount_enter_dead(Mount *m, bool success) {
681 assert(m);
682
683 if (!success)
684 m->failure = true;
685
fdf20a31 686 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
e537352b
LP		 687}
688
80876c20
LP		 689static void mount_enter_mounted(Mount *m, bool success) {
690 assert(m);
691
692 if (!success)
693 m->failure = true;
694
695 mount_set_state(m, MOUNT_MOUNTED);
696}
697
e537352b
LP		 698static void mount_enter_signal(Mount *m, MountState state, bool success) {
699 int r;
ca949c9d
LP		 700 Set *pid_set = NULL;
701 bool wait_for_exit = false;
e537352b
LP		 702
703 assert(m);
704
705 if (!success)
706 m->failure = true;
707
2e22afe9 708 if (m->exec_context.kill_mode != KILL_NONE) {
80876c20
LP		 709 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
710 state == MOUNT_UNMOUNTING_SIGTERM ||
2e22afe9 711 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
e537352b 712
ca949c9d
LP		 713 if (m->control_pid > 0) {
714 if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
715 -m->control_pid :
716 m->control_pid, sig) < 0 && errno != ESRCH)
e537352b 717
ca949c9d
LP		 718 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
719 else
720 wait_for_exit = true;
e537352b
LP		 721 }
722
ca949c9d 723 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
2e22afe9 724
ca949c9d
LP		 725 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
726 r = -ENOMEM;
e537352b
LP		 727 goto fail;
728 }
ca949c9d
LP		 729
730 /* Exclude the control pid from being killed via the cgroup */
731 if (m->control_pid > 0)
732 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
733 goto fail;
734
735 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
736 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
737 log_warning("Failed to kill control group: %s", strerror(-r));
738 } else if (r > 0)
739 wait_for_exit = true;
740
741 set_free(pid_set);
742 }
e537352b
LP		 743 }
744
ca949c9d 745 if (wait_for_exit) {
80876c20
LP		 746 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
747 goto fail;
e537352b 748
80876c20
LP		 749 mount_set_state(m, state);
750 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
751 mount_enter_mounted(m, true);
752 else
e537352b
LP		 753 mount_enter_dead(m, true);
754
755 return;
756
757fail:
4cd1fbcc 758 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
e537352b 759
80876c20
LP		 760 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
761 mount_enter_mounted(m, false);
762 else
763 mount_enter_dead(m, false);
ca949c9d
LP		 764
765 if (pid_set)
766 set_free(pid_set);
e537352b
LP		 767}
768
769static void mount_enter_unmounting(Mount *m, bool success) {
e537352b
LP		 770 int r;
771
772 assert(m);
773
774 if (!success)
775 m->failure = true;
776
a16e1123
LP		 777 m->control_command_id = MOUNT_EXEC_UNMOUNT;
778 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
e537352b
LP		 779
780 if ((r = exec_command_set(
a16e1123 781 m->control_command,
e537352b
LP		 782 "/bin/umount",
783 m->where,
784 NULL)) < 0)
785 goto fail;
786
a16e1123 787 mount_unwatch_control_pid(m);
5e94833f 788
a16e1123 789 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
e537352b
LP		 790 goto fail;
791
792 mount_set_state(m, MOUNT_UNMOUNTING);
793
794 return;
795
796fail:
4cd1fbcc 797 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
e537352b
LP		 798 mount_enter_mounted(m, false);
799}
800
8d567588 801static void mount_enter_mounting(Mount *m) {
e537352b
LP		 802 int r;
803
804 assert(m);
805
a16e1123
LP		 806 m->control_command_id = MOUNT_EXEC_MOUNT;
807 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
e537352b 808
3e5235b0
LP		 809 mkdir_p(m->where, m->directory_mode);
810
e537352b
LP		 811 if (m->from_fragment)
812 r = exec_command_set(
a16e1123 813 m->control_command,
e537352b
LP		 814 "/bin/mount",
815 m->parameters_fragment.what,
816 m->where,
40b8a332 817 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
8d567588 818 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
e537352b
LP		 819 NULL);
820 else if (m->from_etc_fstab)
821 r = exec_command_set(
a16e1123 822 m->control_command,
e537352b
LP		 823 "/bin/mount",
824 m->where,
825 NULL);
826 else
827 r = -ENOENT;
828
829 if (r < 0)
830 goto fail;
831
a16e1123 832 mount_unwatch_control_pid(m);
5e94833f 833
a16e1123 834 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
e537352b
LP		 835 goto fail;
836
837 mount_set_state(m, MOUNT_MOUNTING);
838
839 return;
840
841fail:
4cd1fbcc 842 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
e537352b
LP		 843 mount_enter_dead(m, false);
844}
845
8d567588 846static void mount_enter_mounting_done(Mount *m) {
e537352b
LP		 847 assert(m);
848
e537352b
LP		 849 mount_set_state(m, MOUNT_MOUNTING_DONE);
850}
851
852static void mount_enter_remounting(Mount *m, bool success) {
e537352b
LP		 853 int r;
854
855 assert(m);
856
857 if (!success)
858 m->failure = true;
859
a16e1123
LP		 860 m->control_command_id = MOUNT_EXEC_REMOUNT;
861 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
e537352b
LP		 862
863 if (m->from_fragment) {
864 char *buf = NULL;
865 const char *o;
866
867 if (m->parameters_fragment.options) {
868 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
869 r = -ENOMEM;
870 goto fail;
871 }
872
873 o = buf;
874 } else
875 o = "remount";
876
877 r = exec_command_set(
a16e1123 878 m->control_command,
e537352b
LP		 879 "/bin/mount",
880 m->parameters_fragment.what,
881 m->where,
40b8a332 882 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
e537352b
LP		 883 "-o", o,
884 NULL);
885
886 free(buf);
887 } else if (m->from_etc_fstab)
888 r = exec_command_set(
a16e1123 889 m->control_command,
e537352b
LP		 890 "/bin/mount",
891 m->where,
892 "-o", "remount",
893 NULL);
894 else
895 r = -ENOENT;
896
60b912f6 897 if (r < 0)
e537352b 898 goto fail;
e537352b 899
a16e1123 900 mount_unwatch_control_pid(m);
5e94833f 901
a16e1123 902 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
e537352b
LP		 903 goto fail;
904
905 mount_set_state(m, MOUNT_REMOUNTING);
906
907 return;
908
909fail:
e364ad06 910 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
e537352b
LP		 911 mount_enter_mounted(m, false);
912}
913
914static int mount_start(Unit *u) {
915 Mount *m = MOUNT(u);
916
917 assert(m);
918
919 /* We cannot fulfill this request right now, try again later
920 * please! */
921 if (m->state == MOUNT_UNMOUNTING ||
922 m->state == MOUNT_UNMOUNTING_SIGTERM ||
60b912f6
LP		 923 m->state == MOUNT_UNMOUNTING_SIGKILL ||
924 m->state == MOUNT_MOUNTING_SIGTERM ||
925 m->state == MOUNT_MOUNTING_SIGKILL)
e537352b
LP		 926 return -EAGAIN;
927
928 /* Already on it! */
60b912f6 929 if (m->state == MOUNT_MOUNTING)
e537352b
LP		 930 return 0;
931
fdf20a31 932 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
e537352b
LP		 933
934 m->failure = false;
8d567588 935 mount_enter_mounting(m);
e537352b
LP		 936 return 0;
937}
938
939static int mount_stop(Unit *u) {
940 Mount *m = MOUNT(u);
941
942 assert(m);
943
e537352b
LP		 944 /* Already on it */
945 if (m->state == MOUNT_UNMOUNTING ||
946 m->state == MOUNT_UNMOUNTING_SIGKILL ||
60b912f6
LP		 947 m->state == MOUNT_UNMOUNTING_SIGTERM ||
948 m->state == MOUNT_MOUNTING_SIGTERM ||
949 m->state == MOUNT_MOUNTING_SIGKILL)
e537352b
LP		 950 return 0;
951
3f6c78dc
LP		 952 assert(m->state == MOUNT_MOUNTING ||
953 m->state == MOUNT_MOUNTING_DONE ||
954 m->state == MOUNT_MOUNTED ||
3f6c78dc
LP		 955 m->state == MOUNT_REMOUNTING ||
956 m->state == MOUNT_REMOUNTING_SIGTERM ||
957 m->state == MOUNT_REMOUNTING_SIGKILL);
e537352b
LP		 958
959 mount_enter_unmounting(m, true);
960 return 0;
961}
962
963static int mount_reload(Unit *u) {
964 Mount *m = MOUNT(u);
965
966 assert(m);
967
968 if (m->state == MOUNT_MOUNTING_DONE)
969 return -EAGAIN;
970
971 assert(m->state == MOUNT_MOUNTED);
972
973 mount_enter_remounting(m, true);
974 return 0;
975}
976
a16e1123
LP		 977static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
978 Mount *m = MOUNT(u);
979
980 assert(m);
981 assert(f);
982 assert(fds);
983
984 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
985 unit_serialize_item(u, f, "failure", yes_no(m->failure));
986
987 if (m->control_pid > 0)
5925dd3c 988 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
a16e1123
LP		 989
990 if (m->control_command_id >= 0)
991 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
992
993 return 0;
994}
995
996static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
997 Mount *m = MOUNT(u);
a16e1123
LP		 998
999 assert(u);
1000 assert(key);
1001 assert(value);
1002 assert(fds);
1003
1004 if (streq(key, "state")) {
1005 MountState state;
1006
1007 if ((state = mount_state_from_string(value)) < 0)
1008 log_debug("Failed to parse state value %s", value);
1009 else
1010 m->deserialized_state = state;
1011 } else if (streq(key, "failure")) {
1012 int b;
1013
1014 if ((b = parse_boolean(value)) < 0)
1015 log_debug("Failed to parse failure value %s", value);
1016 else
1017 m->failure = b || m->failure;
1018
1019 } else if (streq(key, "control-pid")) {
5925dd3c 1020 pid_t pid;
a16e1123 1021
e364ad06 1022 if (parse_pid(value, &pid) < 0)
a16e1123
LP		 1023 log_debug("Failed to parse control-pid value %s", value);
1024 else
5925dd3c 1025 m->control_pid = pid;
a16e1123
LP		 1026 } else if (streq(key, "control-command")) {
1027 MountExecCommand id;
1028
1029 if ((id = mount_exec_command_from_string(value)) < 0)
1030 log_debug("Failed to parse exec-command value %s", value);
1031 else {
1032 m->control_command_id = id;
1033 m->control_command = m->exec_command + id;
1034 }
1035
1036 } else
1037 log_debug("Unknown serialization key '%s'", key);
1038
1039 return 0;
1040}
1041
e537352b
LP		 1042static UnitActiveState mount_active_state(Unit *u) {
1043 assert(u);
1044
1045 return state_translation_table[MOUNT(u)->state];
1046}
1047
10a94420
LP		 1048static const char *mount_sub_state_to_string(Unit *u) {
1049 assert(u);
1050
a16e1123 1051 return mount_state_to_string(MOUNT(u)->state);
10a94420
LP		 1052}
1053
701cc384
LP		 1054static bool mount_check_gc(Unit *u) {
1055 Mount *m = MOUNT(u);
1056
1057 assert(m);
1058
1059 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1060}
1061
e537352b
LP		 1062static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1063 Mount *m = MOUNT(u);
1064 bool success;
1065
1066 assert(m);
1067 assert(pid >= 0);
1068
8c47c732
LP		 1069 if (pid != m->control_pid)
1070 return;
e537352b 1071
e537352b
LP		 1072 m->control_pid = 0;
1073
8c47c732
LP		 1074 success = is_clean_exit(code, status);
1075 m->failure = m->failure || !success;
1076
a16e1123 1077 if (m->control_command) {
169c1bda 1078 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
a16e1123
LP		 1079 m->control_command = NULL;
1080 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1081 }
1082
92abbefb
LP		 1083 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1084 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
e537352b
LP		 1085
1086 /* Note that mount(8) returning and the kernel sending us a
1087 * mount table change event might happen out-of-order. If an
1088 * operation succeed we assume the kernel will follow soon too
1089 * and already change into the resulting state. If it fails
1090 * we check if the kernel still knows about the mount. and
1091 * change state accordingly. */
1092
1093 switch (m->state) {
1094
1095 case MOUNT_MOUNTING:
1096 case MOUNT_MOUNTING_DONE:
1097 case MOUNT_MOUNTING_SIGKILL:
1098 case MOUNT_MOUNTING_SIGTERM:
1099 case MOUNT_REMOUNTING:
1100 case MOUNT_REMOUNTING_SIGKILL:
1101 case MOUNT_REMOUNTING_SIGTERM:
1102
19b160fa 1103 if (success)
e537352b
LP		 1104 mount_enter_mounted(m, true);
1105 else if (m->from_proc_self_mountinfo)
1106 mount_enter_mounted(m, false);
1107 else
1108 mount_enter_dead(m, false);
1109 break;
1110
1111 case MOUNT_UNMOUNTING:
1112 case MOUNT_UNMOUNTING_SIGKILL:
1113 case MOUNT_UNMOUNTING_SIGTERM:
1114
1115 if (success)
1116 mount_enter_dead(m, true);
1117 else if (m->from_proc_self_mountinfo)
1118 mount_enter_mounted(m, false);
1119 else
1120 mount_enter_dead(m, false);
1121 break;
1122
1123 default:
1124 assert_not_reached("Uh, control process died at wrong time.");
1125 }
c4e2ceae
LP		 1126
1127 /* Notify clients about changed exit status */
1128 unit_add_to_dbus_queue(u);
e537352b
LP		 1129}
1130
1131static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1132 Mount *m = MOUNT(u);
1133
1134 assert(m);
1135 assert(elapsed == 1);
1136 assert(w == &m->timer_watch);
1137
1138 switch (m->state) {
1139
1140 case MOUNT_MOUNTING:
1141 case MOUNT_MOUNTING_DONE:
9e2f7c11 1142 log_warning("%s mounting timed out. Stopping.", u->meta.id);
e537352b
LP		 1143 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1144 break;
1145
1146 case MOUNT_REMOUNTING:
9e2f7c11 1147 log_warning("%s remounting timed out. Stopping.", u->meta.id);
e537352b
LP		 1148 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1149 break;
1150
1151 case MOUNT_UNMOUNTING:
9e2f7c11 1152 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
e537352b
LP		 1153 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1154 break;
1155
1156 case MOUNT_MOUNTING_SIGTERM:
9e2f7c11 1157 log_warning("%s mounting timed out. Killing.", u->meta.id);
e537352b
LP		 1158 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1159 break;
1160
1161 case MOUNT_REMOUNTING_SIGTERM:
9e2f7c11 1162 log_warning("%s remounting timed out. Killing.", u->meta.id);
e537352b
LP		 1163 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1164 break;
1165
1166 case MOUNT_UNMOUNTING_SIGTERM:
9e2f7c11 1167 log_warning("%s unmounting timed out. Killing.", u->meta.id);
e537352b
LP		 1168 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1169 break;
1170
1171 case MOUNT_MOUNTING_SIGKILL:
1172 case MOUNT_REMOUNTING_SIGKILL:
1173 case MOUNT_UNMOUNTING_SIGKILL:
9e2f7c11 1174 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
e537352b
LP		 1175
1176 if (m->from_proc_self_mountinfo)
1177 mount_enter_mounted(m, false);
1178 else
1179 mount_enter_dead(m, false);
1180 break;
1181
1182 default:
1183 assert_not_reached("Timeout at wrong time.");
1184 }
1185}
1186
1187static int mount_add_one(
1188 Manager *m,
1189 const char *what,
1190 const char *where,
1191 const char *options,
1192 const char *fstype,
9fff8a1f 1193 int passno,
e537352b
LP		 1194 bool from_proc_self_mountinfo,
1195 bool set_flags) {
b08d03ff
LP		 1196 int r;
1197 Unit *u;
1198 bool delete;
e537352b 1199 char *e, *w = NULL, *o = NULL, *f = NULL;
4e85aff4 1200 MountParameters *p;
b08d03ff 1201
f50e0a01 1202 assert(m);
b08d03ff
LP		 1203 assert(what);
1204 assert(where);
e537352b
LP		 1205 assert(options);
1206 assert(fstype);
1207
1208 assert(!set_flags || from_proc_self_mountinfo);
1209
1210 /* Ignore API mount points. They should never be referenced in
1211 * dependencies ever. */
1212 if (mount_point_is_api(where))
1213 return 0;
b08d03ff 1214
8d567588
LP		 1215 if (streq(fstype, "autofs"))
1216 return 0;
1217
4e85aff4
LP		 1218 /* probably some kind of swap, ignore */
1219 if (!is_path(where))
b08d03ff
LP		 1220 return 0;
1221
a16e1123 1222 if (!(e = unit_name_from_path(where, ".mount")))
b08d03ff
LP		 1223 return -ENOMEM;
1224
1225 if (!(u = manager_get_unit(m, e))) {
1226 delete = true;
1227
1228 if (!(u = unit_new(m))) {
1229 free(e);
1230 return -ENOMEM;
1231 }
1232
1233 r = unit_add_name(u, e);
1234 free(e);
1235
1236 if (r < 0)
1237 goto fail;
1238
e537352b 1239 if (!(MOUNT(u)->where = strdup(where))) {
07b0b134
ML		 1240 r = -ENOMEM;
1241 goto fail;
1242 }
f50e0a01 1243
f94ea366 1244 unit_add_to_load_queue(u);
b08d03ff
LP		 1245 } else {
1246 delete = false;
1247 free(e);
1248 }
1249
e537352b
LP		 1250 if (!(w = strdup(what)) ||
1251 !(o = strdup(options)) ||
1252 !(f = strdup(fstype))) {
1253 r = -ENOMEM;
1254 goto fail;
1255 }
1256
1257 if (from_proc_self_mountinfo) {
4e85aff4 1258 p = &MOUNT(u)->parameters_proc_self_mountinfo;
e537352b
LP		 1259
1260 if (set_flags) {
1261 MOUNT(u)->is_mounted = true;
1262 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
4e85aff4 1263 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
e537352b 1264 }
ef734fd6 1265
f50e0a01 1266 MOUNT(u)->from_proc_self_mountinfo = true;
ef734fd6 1267 } else {
4e85aff4 1268 p = &MOUNT(u)->parameters_etc_fstab;
f50e0a01 1269 MOUNT(u)->from_etc_fstab = true;
ef734fd6 1270 }
f50e0a01 1271
4e85aff4
LP		 1272 free(p->what);
1273 p->what = w;
b08d03ff 1274
4e85aff4
LP		 1275 free(p->options);
1276 p->options = o;
e537352b 1277
4e85aff4
LP		 1278 free(p->fstype);
1279 p->fstype = f;
b08d03ff 1280
9fff8a1f
LP		 1281 p->passno = passno;
1282
c1e1601e
LP		 1283 unit_add_to_dbus_queue(u);
1284
b08d03ff
LP		 1285 return 0;
1286
1287fail:
e537352b
LP		 1288 free(w);
1289 free(o);
1290 free(f);
1291
b08d03ff
LP		 1292 if (delete && u)
1293 unit_free(u);
1294
4e85aff4 1295 return r;
b08d03ff
LP		 1296}
1297
1298static char *fstab_node_to_udev_node(char *p) {
11ce3427 1299 char *dn, *t, *u;
b08d03ff
LP		 1300 int r;
1301
1302 /* FIXME: to follow udev's logic 100% we need to leave valid
1303 * UTF8 chars unescaped */
1304
1305 if (startswith(p, "LABEL=")) {
1306
97c4a07d 1307 if (!(u = unquote(p+6, "\"\'")))
11ce3427
LP		 1308 return NULL;
1309
1310 t = xescape(u, "/ ");
1311 free(u);
1312
1313 if (!t)
b08d03ff
LP		 1314 return NULL;
1315
f50e0a01 1316 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
b08d03ff
LP		 1317 free(t);
1318
1319 if (r < 0)
1320 return NULL;
1321
1322 return dn;
1323 }
1324
1325 if (startswith(p, "UUID=")) {
1326
97c4a07d 1327 if (!(u = unquote(p+5, "\"\'")))
11ce3427
LP		 1328 return NULL;
1329
1330 t = xescape(u, "/ ");
1331 free(u);
1332
1333 if (!t)
b08d03ff
LP		 1334 return NULL;
1335
f50e0a01 1336 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
b08d03ff
LP		 1337 free(t);
1338
1339 if (r < 0)
1340 return NULL;
1341
1342 return dn;
1343 }
1344
1345 return strdup(p);
1346}
1347
07b0b134
ML		 1348static int mount_find_pri(char *options) {
1349 char *end, *pri;
1350 unsigned long r;
1351
1352 if (!(pri = mount_test_option(options, "pri=")))
1353 return 0;
1354
1355 pri += 4;
1356
1357 errno = 0;
1358 r = strtoul(pri, &end, 10);
1359
1360 if (errno != 0)
1361 return -errno;
1362
1363 if (end == pri || (*end != ',' && *end != 0))
1364 return -EINVAL;
1365
1366 return (int) r;
1367}
1368
e537352b 1369static int mount_load_etc_fstab(Manager *m) {
b08d03ff 1370 FILE *f;
60b912f6 1371 int r = 0;
b08d03ff
LP		 1372 struct mntent* me;
1373
1374 assert(m);
1375
1376 errno = 0;
1377 if (!(f = setmntent("/etc/fstab", "r")))
1378 return -errno;
1379
1380 while ((me = getmntent(f))) {
1381 char *where, *what;
60b912f6 1382 int k;
b08d03ff
LP		 1383
1384 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1385 r = -ENOMEM;
1386 goto finish;
1387 }
1388
1389 if (!(where = strdup(me->mnt_dir))) {
1390 free(what);
1391 r = -ENOMEM;
1392 goto finish;
1393 }
1394
1395 if (what[0] == '/')
1396 path_kill_slashes(what);
1397
1398 if (where[0] == '/')
1399 path_kill_slashes(where);
1400
07b0b134
ML		 1401 if (streq(me->mnt_type, "swap")) {
1402 int pri;
1403
1404 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
60b912f6 1405 k = pri;
07b0b134 1406 else
60b912f6 1407 k = swap_add_one(m,
07b0b134 1408 what,
60b912f6 1409 NULL,
07b0b134 1410 pri,
4e85aff4 1411 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
173a8d04 1412 !!mount_test_option(me->mnt_opts, "nofail"),
4e85aff4 1413 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
07b0b134
ML		 1414 false);
1415 } else
9fff8a1f 1416 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
07b0b134 1417
b08d03ff
LP		 1418 free(what);
1419 free(where);
1420
1421 if (r < 0)
60b912f6 1422 r = k;
b08d03ff
LP		 1423 }
1424
b08d03ff
LP		 1425finish:
1426
1427 endmntent(f);
1428 return r;
1429}
1430
ef734fd6 1431static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
60b912f6 1432 int r = 0;
1ddff895 1433 unsigned i;
a2e0f3d3 1434 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
b08d03ff
LP		 1435
1436 assert(m);
1437
ef734fd6 1438 rewind(m->proc_self_mountinfo);
b08d03ff 1439
1ddff895 1440 for (i = 1;; i++) {
b08d03ff 1441 int k;
e537352b 1442
a2e0f3d3 1443 device = path = options = options2 = fstype = d = p = o = NULL;
b08d03ff 1444
ef734fd6 1445 if ((k = fscanf(m->proc_self_mountinfo,
b08d03ff
LP		 1446 "%*s " /* (1) mount id */
1447 "%*s " /* (2) parent id */
1448 "%*s " /* (3) major:minor */
1449 "%*s " /* (4) root */
1450 "%ms " /* (5) mount point */
e537352b 1451 "%ms" /* (6) mount options */
b08d03ff 1452 "%*[^-]" /* (7) optional fields */
c899f8c6 1453 "- " /* (8) separator */
e537352b 1454 "%ms " /* (9) file system type */
ef734fd6 1455 "%ms" /* (10) mount source */
a2e0f3d3 1456 "%ms" /* (11) mount options 2 */
ef734fd6 1457 "%*[^\n]", /* some rubbish at the end */
b08d03ff 1458 &path,
e537352b
LP		 1459 &options,
1460 &fstype,
a2e0f3d3
LP		 1461 &device,
1462 &options2)) != 5) {
b08d03ff 1463
ef734fd6
LP		 1464 if (k == EOF)
1465 break;
b08d03ff 1466
1ddff895
FF		 1467 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1468 goto clean_up;
b08d03ff
LP		 1469 }
1470
a2e0f3d3
LP		 1471 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1472 r = -ENOMEM;
1473 goto finish;
1474 }
1475
e537352b
LP		 1476 if (!(d = cunescape(device)) ||
1477 !(p = cunescape(path))) {
1478 r = -ENOMEM;
1479 goto finish;
b08d03ff 1480 }
b08d03ff 1481
9fff8a1f 1482 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
60b912f6 1483 r = k;
b08d03ff 1484
1ddff895 1485clean_up:
e537352b
LP		 1486 free(device);
1487 free(path);
1488 free(options);
a2e0f3d3 1489 free(options2);
e537352b 1490 free(fstype);
b08d03ff
LP		 1491 free(d);
1492 free(p);
a2e0f3d3 1493 free(o);
b08d03ff
LP		 1494 }
1495
e537352b
LP		 1496finish:
1497 free(device);
1498 free(path);
1499 free(options);
a2e0f3d3 1500 free(options2);
e537352b
LP		 1501 free(fstype);
1502 free(d);
1503 free(p);
a2e0f3d3 1504 free(o);
e537352b
LP		 1505
1506 return r;
1507}
1508
1509static void mount_shutdown(Manager *m) {
1510 assert(m);
1511
a16e1123 1512 if (m->proc_self_mountinfo) {
e537352b 1513 fclose(m->proc_self_mountinfo);
a16e1123
LP		 1514 m->proc_self_mountinfo = NULL;
1515 }
b08d03ff
LP		 1516}
1517
1518static int mount_enumerate(Manager *m) {
1519 int r;
ef734fd6 1520 struct epoll_event ev;
b08d03ff
LP		 1521 assert(m);
1522
a16e1123
LP		 1523 if (!m->proc_self_mountinfo) {
1524 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1525 return -errno;
ef734fd6 1526
a16e1123
LP		 1527 m->mount_watch.type = WATCH_MOUNT;
1528 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
ef734fd6 1529
a16e1123 1530 zero(ev);
4e434314 1531 ev.events = EPOLLPRI;
a16e1123 1532 ev.data.ptr = &m->mount_watch;
ef734fd6 1533
a16e1123
LP		 1534 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1535 return -errno;
1536 }
ef734fd6 1537
e537352b 1538 if ((r = mount_load_etc_fstab(m)) < 0)
b08d03ff
LP		 1539 goto fail;
1540
ef734fd6 1541 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
b08d03ff
LP		 1542 goto fail;
1543
1544 return 0;
1545
1546fail:
1547 mount_shutdown(m);
1548 return r;
5cb5a6ff
LP		 1549}
1550
ef734fd6
LP		 1551void mount_fd_event(Manager *m, int events) {
1552 Meta *meta;
1553 int r;
1554
1555 assert(m);
4e434314 1556 assert(events & EPOLLPRI);
ef734fd6
LP		 1557
1558 /* The manager calls this for every fd event happening on the
1559 * /proc/self/mountinfo file, which informs us about mounting
1560 * table changes */
1561
1562 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
e364ad06 1563 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
e537352b
LP		 1564
1565 /* Reset flags, just in case, for later calls */
1566 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1567 Mount *mount = (Mount*) meta;
1568
1569 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1570 }
1571
ef734fd6
LP		 1572 return;
1573 }
1574
1575 manager_dispatch_load_queue(m);
1576
1577 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1578 Mount *mount = (Mount*) meta;
1579
e537352b
LP		 1580 if (!mount->is_mounted) {
1581 /* This has just been unmounted. */
1582
ef734fd6 1583 mount->from_proc_self_mountinfo = false;
e537352b
LP		 1584
1585 switch (mount->state) {
1586
1587 case MOUNT_MOUNTED:
1588 mount_enter_dead(mount, true);
1589 break;
1590
1591 default:
1592 mount_set_state(mount, mount->state);
1593 break;
1594
1595 }
1596
1597 } else if (mount->just_mounted || mount->just_changed) {
1598
60b912f6 1599 /* New or changed mount entry */
e537352b
LP		 1600
1601 switch (mount->state) {
1602
1603 case MOUNT_DEAD:
fdf20a31 1604 case MOUNT_FAILED:
e537352b
LP		 1605 mount_enter_mounted(mount, true);
1606 break;
1607
1608 case MOUNT_MOUNTING:
8d567588 1609 mount_enter_mounting_done(mount);
e537352b
LP		 1610 break;
1611
1612 default:
1613 /* Nothing really changed, but let's
1614 * issue an notification call
1615 * nonetheless, in case somebody is
1616 * waiting for this. (e.g. file system
1617 * ro/rw remounts.) */
1618 mount_set_state(mount, mount->state);
1619 break;
1620 }
1621 }
1622
1623 /* Reset the flags for later calls */
1624 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1625 }
1626}
1627
fdf20a31 1628static void mount_reset_failed(Unit *u) {
5632e374
LP		 1629 Mount *m = MOUNT(u);
1630
1631 assert(m);
1632
fdf20a31 1633 if (m->state == MOUNT_FAILED)
5632e374
LP		 1634 mount_set_state(m, MOUNT_DEAD);
1635
1636 m->failure = false;
1637}
1638
a16e1123
LP		 1639static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1640 [MOUNT_DEAD] = "dead",
1641 [MOUNT_MOUNTING] = "mounting",
1642 [MOUNT_MOUNTING_DONE] = "mounting-done",
1643 [MOUNT_MOUNTED] = "mounted",
1644 [MOUNT_REMOUNTING] = "remounting",
1645 [MOUNT_UNMOUNTING] = "unmounting",
1646 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1647 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1648 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1649 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1650 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1651 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
fdf20a31 1652 [MOUNT_FAILED] = "failed"
a16e1123
LP		 1653};
1654
1655DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1656
1657static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1658 [MOUNT_EXEC_MOUNT] = "ExecMount",
1659 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1660 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1661};
1662
1663DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1664
87f0e418 1665const UnitVTable mount_vtable = {
5cb5a6ff
LP		 1666 .suffix = ".mount",
1667
e537352b 1668 .no_alias = true,
9e2f7c11 1669 .no_instances = true,
c497c7a9 1670 .no_isolate = true,
9e58ff9c 1671 .show_status = true,
e537352b
LP		 1672
1673 .init = mount_init,
1674 .load = mount_load,
034c6ed7 1675 .done = mount_done,
e537352b 1676
f50e0a01
LP		 1677 .coldplug = mount_coldplug,
1678
034c6ed7 1679 .dump = mount_dump,
5cb5a6ff 1680
e537352b
LP		 1681 .start = mount_start,
1682 .stop = mount_stop,
1683 .reload = mount_reload,
1684
a16e1123
LP		 1685 .serialize = mount_serialize,
1686 .deserialize_item = mount_deserialize_item,
1687
f50e0a01 1688 .active_state = mount_active_state,
10a94420 1689 .sub_state_to_string = mount_sub_state_to_string,
b08d03ff 1690
701cc384
LP		 1691 .check_gc = mount_check_gc,
1692
e537352b
LP		 1693 .sigchld_event = mount_sigchld_event,
1694 .timer_event = mount_timer_event,
1695
fdf20a31 1696 .reset_failed = mount_reset_failed,
5632e374 1697
c4e2ceae 1698 .bus_interface = "org.freedesktop.systemd1.Mount",
4139c1b2 1699 .bus_message_handler = bus_mount_message_handler,
c4e2ceae 1700 .bus_invalidating_properties = bus_mount_invalidating_properties,
4139c1b2 1701
f50e0a01
LP		 1702 .enumerate = mount_enumerate,
1703 .shutdown = mount_shutdown
5cb5a6ff 1704};
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