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unit: don't cancel dependent jobs if a stopped daemon returned an error code
[thirdparty/systemd.git] / src / mount.c
CommitLineData
5cb5a6ff
LP		 1/*-*- Mode: C; c-basic-offset: 8 -*-*/
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
LP		 36#include "mount.h"
37#include "dbus-mount.h"
514f4ef5 38#include "special.h"
5cb5a6ff 39
f50e0a01
LP		 40static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
41 [MOUNT_DEAD] = UNIT_INACTIVE,
42 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
e537352b 43 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
f50e0a01 44 [MOUNT_MOUNTED] = UNIT_ACTIVE,
032ff4af 45 [MOUNT_REMOUNTING] = UNIT_RELOADING,
f50e0a01 46 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
e537352b
LP		 47 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
48 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
032ff4af
LP		 49 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
50 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
e537352b
LP		 51 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
52 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
032ff4af 53 [MOUNT_MAINTENANCE] = UNIT_MAINTENANCE
f50e0a01 54};
5cb5a6ff 55
a16e1123
LP		 56static void mount_init(Unit *u) {
57 Mount *m = MOUNT(u);
5cb5a6ff 58
a16e1123
LP		 59 assert(u);
60 assert(u->meta.load_state == UNIT_STUB);
61
62 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
63 exec_context_init(&m->exec_context);
8d567588 64
3e5235b0
LP		 65 m->directory_mode = 0755;
66
a16e1123
LP		 67 /* We need to make sure that /bin/mount is always called in
68 * the same process group as us, so that the autofs kernel
69 * side doesn't send us another mount request while we are
70 * already trying to comply its last one. */
74922904 71 m->exec_context.same_pgrp = true;
8d567588 72
a16e1123
LP		 73 m->timer_watch.type = WATCH_INVALID;
74
75 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
8d567588
LP		 76}
77
a16e1123 78static void mount_unwatch_control_pid(Mount *m) {
5e94833f
LP		 79 assert(m);
80
81 if (m->control_pid <= 0)
82 return;
83
84 unit_unwatch_pid(UNIT(m), m->control_pid);
85 m->control_pid = 0;
86}
87
e537352b
LP		 88static void mount_parameters_done(MountParameters *p) {
89 assert(p);
90
91 free(p->what);
92 free(p->options);
93 free(p->fstype);
94
95 p->what = p->options = p->fstype = NULL;
96}
97
87f0e418 98static void mount_done(Unit *u) {
ef734fd6 99 Mount *m = MOUNT(u);
034c6ed7 100
ef734fd6 101 assert(m);
034c6ed7 102
e537352b
LP		 103 free(m->where);
104 m->where = NULL;
f50e0a01 105
e537352b
LP		 106 mount_parameters_done(&m->parameters_etc_fstab);
107 mount_parameters_done(&m->parameters_proc_self_mountinfo);
108 mount_parameters_done(&m->parameters_fragment);
ef734fd6 109
e537352b
LP		 110 exec_context_done(&m->exec_context);
111 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
112 m->control_command = NULL;
f50e0a01 113
a16e1123 114 mount_unwatch_control_pid(m);
f50e0a01 115
e537352b 116 unit_unwatch_timer(u, &m->timer_watch);
f50e0a01
LP		 117}
118
6e2ef85b
LP		 119static int mount_add_mount_links(Mount *m) {
120 Meta *other;
b08d03ff
LP		 121 int r;
122
6e2ef85b 123 assert(m);
b08d03ff 124
6e2ef85b
LP		 125 /* Adds in links to other mount points that might lie below or
126 * above us in the hierarchy */
e537352b 127
6e2ef85b
LP		 128 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
129 Mount *n = (Mount*) other;
07b0b134 130
6e2ef85b
LP		 131 if (n == m)
132 continue;
b08d03ff 133
6e2ef85b
LP		 134 if (n->meta.load_state != UNIT_LOADED)
135 continue;
b08d03ff 136
6e2ef85b 137 if (path_startswith(m->where, n->where)) {
b08d03ff 138
6e2ef85b
LP		 139 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
140 return r;
b08d03ff 141
6e2ef85b
LP		 142 if (n->from_etc_fstab || n->from_fragment)
143 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
144 return r;
b08d03ff 145
6e2ef85b 146 } else if (path_startswith(n->where, m->where)) {
b08d03ff 147
6e2ef85b
LP		 148 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(n), true)) < 0)
149 return r;
150
151 if (m->from_etc_fstab || m->from_fragment)
152 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
153 return r;
154 }
155 }
b08d03ff
LP		 156
157 return 0;
158}
159
6e2ef85b 160static int mount_add_swap_links(Mount *m) {
ef734fd6 161 Meta *other;
b08d03ff
LP		 162 int r;
163
6e2ef85b 164 assert(m);
b08d03ff 165
6e2ef85b
LP		 166 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
167 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
168 return r;
b08d03ff 169
6e2ef85b
LP		 170 return 0;
171}
b08d03ff 172
01f78473
LP		 173static int mount_add_path_links(Mount *m) {
174 Meta *other;
175 int r;
176
177 assert(m);
178
179 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
180 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
181 return r;
182
183 return 0;
184}
185
6e2ef85b
LP		 186static int mount_add_automount_links(Mount *m) {
187 Meta *other;
188 int r;
e537352b 189
6e2ef85b 190 assert(m);
b08d03ff 191
6e2ef85b
LP		 192 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
193 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
194 return r;
b08d03ff 195
6e2ef85b
LP		 196 return 0;
197}
b08d03ff 198
6e2ef85b
LP		 199static int mount_add_socket_links(Mount *m) {
200 Meta *other;
201 int r;
b08d03ff 202
6e2ef85b 203 assert(m);
b08d03ff 204
6e2ef85b
LP		 205 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
206 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
207 return r;
b08d03ff
LP		 208
209 return 0;
210}
211
07b0b134 212static char* mount_test_option(const char *haystack, const char *needle) {
e537352b
LP		 213 struct mntent me;
214
215 assert(needle);
216
217 /* Like glibc's hasmntopt(), but works on a string, not a
218 * struct mntent */
219
220 if (!haystack)
221 return false;
222
223 zero(me);
224 me.mnt_opts = (char*) haystack;
225
07b0b134 226 return hasmntopt(&me, needle);
e537352b
LP		 227}
228
229static int mount_add_target_links(Mount *m) {
230 const char *target;
231 MountParameters *p;
a16e1123 232 Unit *tu;
e537352b 233 int r;
307e85ef 234 bool noauto, handle, automount, user;
e537352b
LP		 235
236 assert(m);
237
238 if (m->from_fragment)
239 p = &m->parameters_fragment;
240 else if (m->from_etc_fstab)
241 p = &m->parameters_etc_fstab;
242 else
243 return 0;
244
07b0b134 245 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
307e85ef 246 user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users");
07b0b134
ML		 247 handle = !!mount_test_option(p->options, "comment=systemd.mount");
248 automount = !!mount_test_option(p->options, "comment=systemd.automount");
e537352b 249
e537352b
LP		 250 if (mount_test_option(p->options, "_netdev") ||
251 fstype_is_network(p->fstype))
252 target = SPECIAL_REMOTE_FS_TARGET;
253 else
254 target = SPECIAL_LOCAL_FS_TARGET;
255
4cd1fbcc 256 if ((r = manager_load_unit(m->meta.manager, target, NULL, &tu)) < 0)
e537352b
LP		 257 return r;
258
a3d4e06d 259 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
a16e1123
LP		 260 Unit *am;
261
262 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
9fcc065a 263 return r;
e537352b 264
2c966c03 265 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
a16e1123
LP		 266 } else {
267
4e85aff4 268 if (!noauto && handle)
a3d4e06d 269 if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
307e85ef
LP		 270 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
271 return r;
a16e1123 272
701cc384 273 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
a16e1123 274 }
e537352b
LP		 275}
276
8d567588
LP		 277static int mount_verify(Mount *m) {
278 bool b;
279 char *e;
280 assert(m);
281
8cbef760 282 if (m->meta.load_state != UNIT_LOADED)
8d567588
LP		 283 return 0;
284
8cbef760
LP		 285 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
286 return -ENOENT;
287
a16e1123 288 if (!(e = unit_name_from_path(m->where, ".mount")))
8d567588
LP		 289 return -ENOMEM;
290
291 b = unit_has_name(UNIT(m), e);
292 free(e);
293
294 if (!b) {
4cd1fbcc 295 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
8d567588
LP		 296 return -EINVAL;
297 }
298
4e85aff4 299 if (m->meta.fragment_path && !m->parameters_fragment.what) {
4cd1fbcc 300 log_error("%s's What setting is missing. Refusing.", m->meta.id);
4e85aff4
LP		 301 return -EBADMSG;
302 }
303
4d0e5dbd
LP		 304 if (m->exec_context.pam_name && m->kill_mode != KILL_CONTROL_GROUP) {
305 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
306 return -EINVAL;
307 }
308
8d567588
LP		 309 return 0;
310}
311
e537352b
LP		 312static int mount_load(Unit *u) {
313 Mount *m = MOUNT(u);
314 int r;
315
316 assert(u);
317 assert(u->meta.load_state == UNIT_STUB);
318
319 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
320 return r;
321
322 /* This is a new unit? Then let's add in some extras */
323 if (u->meta.load_state == UNIT_LOADED) {
4e85aff4 324 const char *what = NULL;
6e2ef85b 325
4e85aff4
LP		 326 if (m->meta.fragment_path)
327 m->from_fragment = true;
e537352b 328
a16e1123
LP		 329 if (!m->where)
330 if (!(m->where = unit_name_to_path(u->meta.id)))
331 return -ENOMEM;
332
333 path_kill_slashes(m->where);
334
4e85aff4
LP		 335 if (!m->meta.description)
336 if ((r = unit_set_description(u, m->where)) < 0)
337 return r;
e537352b 338
4e85aff4
LP		 339 if (m->from_fragment && m->parameters_fragment.what)
340 what = m->parameters_fragment.what;
341 else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
342 what = m->parameters_etc_fstab.what;
343 else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
344 what = m->parameters_proc_self_mountinfo.what;
e537352b 345
4e85aff4 346 if (what)
a3d4e06d 347 if ((r = unit_add_node_link(u, what, u->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
4e85aff4 348 return r;
6e2ef85b
LP		 349
350 if ((r = mount_add_mount_links(m)) < 0)
351 return r;
352
353 if ((r = mount_add_socket_links(m)) < 0)
354 return r;
355
356 if ((r = mount_add_swap_links(m)) < 0)
e537352b
LP		 357 return r;
358
01f78473
LP		 359 if ((r = mount_add_path_links(m)) < 0)
360 return r;
361
6e2ef85b 362 if ((r = mount_add_automount_links(m)) < 0)
e537352b
LP		 363 return r;
364
6e2ef85b 365 if ((r = mount_add_target_links(m)) < 0)
e537352b
LP		 366 return r;
367
368 if ((r = unit_add_default_cgroup(u)) < 0)
369 return r;
370 }
371
8d567588 372 return mount_verify(m);
e537352b
LP		 373}
374
a16e1123
LP		 375static int mount_notify_automount(Mount *m, int status) {
376 Unit *p;
377 int r;
378
379 assert(m);
380
381 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
382 return r == -ENOENT ? 0 : r;
383
384 return automount_send_ready(AUTOMOUNT(p), status);
385}
386
e537352b
LP		 387static void mount_set_state(Mount *m, MountState state) {
388 MountState old_state;
389 assert(m);
390
391 old_state = m->state;
392 m->state = state;
393
394 if (state != MOUNT_MOUNTING &&
395 state != MOUNT_MOUNTING_DONE &&
396 state != MOUNT_REMOUNTING &&
397 state != MOUNT_UNMOUNTING &&
398 state != MOUNT_MOUNTING_SIGTERM &&
399 state != MOUNT_MOUNTING_SIGKILL &&
400 state != MOUNT_UNMOUNTING_SIGTERM &&
401 state != MOUNT_UNMOUNTING_SIGKILL &&
402 state != MOUNT_REMOUNTING_SIGTERM &&
403 state != MOUNT_REMOUNTING_SIGKILL) {
404 unit_unwatch_timer(UNIT(m), &m->timer_watch);
a16e1123 405 mount_unwatch_control_pid(m);
e537352b 406 m->control_command = NULL;
a16e1123 407 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
e537352b
LP		 408 }
409
8d567588
LP		 410 if (state == MOUNT_MOUNTED ||
411 state == MOUNT_REMOUNTING)
412 mount_notify_automount(m, 0);
413 else if (state == MOUNT_DEAD ||
414 state == MOUNT_UNMOUNTING ||
415 state == MOUNT_MOUNTING_SIGTERM ||
416 state == MOUNT_MOUNTING_SIGKILL ||
417 state == MOUNT_REMOUNTING_SIGTERM ||
418 state == MOUNT_REMOUNTING_SIGKILL ||
419 state == MOUNT_UNMOUNTING_SIGTERM ||
420 state == MOUNT_UNMOUNTING_SIGKILL ||
18c78fb1 421 state == MOUNT_MAINTENANCE)
8d567588
LP		 422 mount_notify_automount(m, -ENODEV);
423
e537352b 424 if (state != old_state)
40d50879 425 log_debug("%s changed %s -> %s",
4cd1fbcc 426 m->meta.id,
a16e1123
LP		 427 mount_state_to_string(old_state),
428 mount_state_to_string(state));
e537352b
LP		 429
430 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
431}
432
433static int mount_coldplug(Unit *u) {
434 Mount *m = MOUNT(u);
a16e1123
LP		 435 MountState new_state = MOUNT_DEAD;
436 int r;
e537352b
LP		 437
438 assert(m);
439 assert(m->state == MOUNT_DEAD);
440
a16e1123
LP		 441 if (m->deserialized_state != m->state)
442 new_state = m->deserialized_state;
443 else if (m->from_proc_self_mountinfo)
444 new_state = MOUNT_MOUNTED;
e537352b 445
a16e1123 446 if (new_state != m->state) {
e537352b 447
a16e1123
LP		 448 if (new_state == MOUNT_MOUNTING ||
449 new_state == MOUNT_MOUNTING_DONE ||
450 new_state == MOUNT_REMOUNTING ||
451 new_state == MOUNT_UNMOUNTING ||
452 new_state == MOUNT_MOUNTING_SIGTERM ||
453 new_state == MOUNT_MOUNTING_SIGKILL ||
454 new_state == MOUNT_UNMOUNTING_SIGTERM ||
455 new_state == MOUNT_UNMOUNTING_SIGKILL ||
456 new_state == MOUNT_REMOUNTING_SIGTERM ||
457 new_state == MOUNT_REMOUNTING_SIGKILL) {
e537352b 458
a16e1123
LP		 459 if (m->control_pid <= 0)
460 return -EBADMSG;
e537352b 461
a16e1123
LP		 462 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
463 return r;
e537352b 464
a16e1123
LP		 465 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
466 return r;
467 }
e537352b 468
a16e1123
LP		 469 mount_set_state(m, new_state);
470 }
e537352b
LP		 471
472 return 0;
e537352b
LP		 473}
474
475static void mount_dump(Unit *u, FILE *f, const char *prefix) {
476 Mount *m = MOUNT(u);
477 MountParameters *p;
478
479 assert(m);
480 assert(f);
481
482 if (m->from_proc_self_mountinfo)
483 p = &m->parameters_proc_self_mountinfo;
484 else if (m->from_fragment)
485 p = &m->parameters_fragment;
486 else
487 p = &m->parameters_etc_fstab;
488
489 fprintf(f,
490 "%sMount State: %s\n"
491 "%sWhere: %s\n"
492 "%sWhat: %s\n"
493 "%sFile System Type: %s\n"
494 "%sOptions: %s\n"
495 "%sFrom /etc/fstab: %s\n"
496 "%sFrom /proc/self/mountinfo: %s\n"
497 "%sFrom fragment: %s\n"
3e5235b0
LP		 498 "%sKillMode: %s\n"
499 "%sDirectoryMode: %04o\n",
a16e1123 500 prefix, mount_state_to_string(m->state),
e537352b
LP		 501 prefix, m->where,
502 prefix, strna(p->what),
503 prefix, strna(p->fstype),
504 prefix, strna(p->options),
505 prefix, yes_no(m->from_etc_fstab),
506 prefix, yes_no(m->from_proc_self_mountinfo),
507 prefix, yes_no(m->from_fragment),
3e5235b0
LP		 508 prefix, kill_mode_to_string(m->kill_mode),
509 prefix, m->directory_mode);
e537352b
LP		 510
511 if (m->control_pid > 0)
512 fprintf(f,
bb00e604
LP		 513 "%sControl PID: %lu\n",
514 prefix, (unsigned long) m->control_pid);
e537352b
LP		 515
516 exec_context_dump(&m->exec_context, f, prefix);
517}
518
a16e1123
LP		 519static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
520 pid_t pid;
521 int r;
522
523 assert(m);
524 assert(c);
525 assert(_pid);
526
527 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
528 goto fail;
529
530 if ((r = exec_spawn(c,
531 NULL,
532 &m->exec_context,
533 NULL, 0,
1137a57c 534 m->meta.manager->environment,
a16e1123
LP		 535 true,
536 true,
4cd1fbcc
LP		 537 m->meta.manager->confirm_spawn,
538 m->meta.cgroup_bondings,
a16e1123
LP		 539 &pid)) < 0)
540 goto fail;
541
542 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
543 /* FIXME: we need to do something here */
544 goto fail;
545
546 *_pid = pid;
547
548 return 0;
549
550fail:
551 unit_unwatch_timer(UNIT(m), &m->timer_watch);
552
553 return r;
554}
555
e537352b
LP		 556static void mount_enter_dead(Mount *m, bool success) {
557 assert(m);
558
559 if (!success)
560 m->failure = true;
561
18c78fb1 562 mount_set_state(m, m->failure ? MOUNT_MAINTENANCE : MOUNT_DEAD);
e537352b
LP		 563}
564
80876c20
LP		 565static void mount_enter_mounted(Mount *m, bool success) {
566 assert(m);
567
568 if (!success)
569 m->failure = true;
570
571 mount_set_state(m, MOUNT_MOUNTED);
572}
573
e537352b
LP		 574static void mount_enter_signal(Mount *m, MountState state, bool success) {
575 int r;
80876c20 576 bool sent = false;
e537352b
LP		 577
578 assert(m);
579
580 if (!success)
581 m->failure = true;
582
80876c20
LP		 583 if (m->kill_mode != KILL_NONE) {
584 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
585 state == MOUNT_UNMOUNTING_SIGTERM ||
586 state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
e537352b
LP		 587
588 if (m->kill_mode == KILL_CONTROL_GROUP) {
589
4cd1fbcc 590 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig)) < 0) {
e537352b
LP		 591 if (r != -EAGAIN && r != -ESRCH)
592 goto fail;
593 } else
594 sent = true;
595 }
596
80876c20 597 if (!sent && m->control_pid > 0)
e537352b
LP		 598 if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
599 r = -errno;
600 goto fail;
601 }
602 }
603
80876c20
LP		 604 if (sent) {
605 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
606 goto fail;
e537352b 607
80876c20
LP		 608 mount_set_state(m, state);
609 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
610 mount_enter_mounted(m, true);
611 else
e537352b
LP		 612 mount_enter_dead(m, true);
613
614 return;
615
616fail:
4cd1fbcc 617 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
e537352b 618
80876c20
LP		 619 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
620 mount_enter_mounted(m, false);
621 else
622 mount_enter_dead(m, false);
e537352b
LP		 623}
624
625static void mount_enter_unmounting(Mount *m, bool success) {
e537352b
LP		 626 int r;
627
628 assert(m);
629
630 if (!success)
631 m->failure = true;
632
a16e1123
LP		 633 m->control_command_id = MOUNT_EXEC_UNMOUNT;
634 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
e537352b
LP		 635
636 if ((r = exec_command_set(
a16e1123 637 m->control_command,
e537352b
LP		 638 "/bin/umount",
639 m->where,
640 NULL)) < 0)
641 goto fail;
642
a16e1123 643 mount_unwatch_control_pid(m);
5e94833f 644
a16e1123 645 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
e537352b
LP		 646 goto fail;
647
648 mount_set_state(m, MOUNT_UNMOUNTING);
649
650 return;
651
652fail:
4cd1fbcc 653 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
e537352b
LP		 654 mount_enter_mounted(m, false);
655}
656
8d567588 657static void mount_enter_mounting(Mount *m) {
e537352b
LP		 658 int r;
659
660 assert(m);
661
a16e1123
LP		 662 m->control_command_id = MOUNT_EXEC_MOUNT;
663 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
e537352b 664
3e5235b0
LP		 665 mkdir_p(m->where, m->directory_mode);
666
e537352b
LP		 667 if (m->from_fragment)
668 r = exec_command_set(
a16e1123 669 m->control_command,
e537352b
LP		 670 "/bin/mount",
671 m->parameters_fragment.what,
672 m->where,
673 "-t", m->parameters_fragment.fstype,
8d567588 674 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
e537352b
LP		 675 NULL);
676 else if (m->from_etc_fstab)
677 r = exec_command_set(
a16e1123 678 m->control_command,
e537352b
LP		 679 "/bin/mount",
680 m->where,
681 NULL);
682 else
683 r = -ENOENT;
684
685 if (r < 0)
686 goto fail;
687
a16e1123 688 mount_unwatch_control_pid(m);
5e94833f 689
a16e1123 690 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
e537352b
LP		 691 goto fail;
692
693 mount_set_state(m, MOUNT_MOUNTING);
694
695 return;
696
697fail:
4cd1fbcc 698 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
e537352b
LP		 699 mount_enter_dead(m, false);
700}
701
8d567588 702static void mount_enter_mounting_done(Mount *m) {
e537352b
LP		 703 assert(m);
704
e537352b
LP		 705 mount_set_state(m, MOUNT_MOUNTING_DONE);
706}
707
708static void mount_enter_remounting(Mount *m, bool success) {
e537352b
LP		 709 int r;
710
711 assert(m);
712
713 if (!success)
714 m->failure = true;
715
a16e1123
LP		 716 m->control_command_id = MOUNT_EXEC_REMOUNT;
717 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
e537352b
LP		 718
719 if (m->from_fragment) {
720 char *buf = NULL;
721 const char *o;
722
723 if (m->parameters_fragment.options) {
724 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
725 r = -ENOMEM;
726 goto fail;
727 }
728
729 o = buf;
730 } else
731 o = "remount";
732
733 r = exec_command_set(
a16e1123 734 m->control_command,
e537352b
LP		 735 "/bin/mount",
736 m->parameters_fragment.what,
737 m->where,
738 "-t", m->parameters_fragment.fstype,
739 "-o", o,
740 NULL);
741
742 free(buf);
743 } else if (m->from_etc_fstab)
744 r = exec_command_set(
a16e1123 745 m->control_command,
e537352b
LP		 746 "/bin/mount",
747 m->where,
748 "-o", "remount",
749 NULL);
750 else
751 r = -ENOENT;
752
753 if (r < 0) {
754 r = -ENOMEM;
755 goto fail;
756 }
757
a16e1123 758 mount_unwatch_control_pid(m);
5e94833f 759
a16e1123 760 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
e537352b
LP		 761 goto fail;
762
763 mount_set_state(m, MOUNT_REMOUNTING);
764
765 return;
766
767fail:
768 mount_enter_mounted(m, false);
769}
770
771static int mount_start(Unit *u) {
772 Mount *m = MOUNT(u);
773
774 assert(m);
775
776 /* We cannot fulfill this request right now, try again later
777 * please! */
778 if (m->state == MOUNT_UNMOUNTING ||
779 m->state == MOUNT_UNMOUNTING_SIGTERM ||
780 m->state == MOUNT_UNMOUNTING_SIGKILL)
781 return -EAGAIN;
782
783 /* Already on it! */
784 if (m->state == MOUNT_MOUNTING ||
785 m->state == MOUNT_MOUNTING_SIGTERM ||
786 m->state == MOUNT_MOUNTING_SIGKILL)
787 return 0;
788
18c78fb1 789 assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTENANCE);
e537352b
LP		 790
791 m->failure = false;
8d567588 792 mount_enter_mounting(m);
e537352b
LP		 793 return 0;
794}
795
796static int mount_stop(Unit *u) {
797 Mount *m = MOUNT(u);
798
799 assert(m);
800
801 /* Cann't do this right now. */
802 if (m->state == MOUNT_MOUNTING ||
803 m->state == MOUNT_MOUNTING_DONE ||
804 m->state == MOUNT_MOUNTING_SIGTERM ||
805 m->state == MOUNT_MOUNTING_SIGKILL ||
806 m->state == MOUNT_REMOUNTING ||
807 m->state == MOUNT_REMOUNTING_SIGTERM ||
808 m->state == MOUNT_REMOUNTING_SIGKILL)
809 return -EAGAIN;
810
811 /* Already on it */
812 if (m->state == MOUNT_UNMOUNTING ||
813 m->state == MOUNT_UNMOUNTING_SIGKILL ||
814 m->state == MOUNT_UNMOUNTING_SIGTERM)
815 return 0;
816
817 assert(m->state == MOUNT_MOUNTED);
818
819 mount_enter_unmounting(m, true);
820 return 0;
821}
822
823static int mount_reload(Unit *u) {
824 Mount *m = MOUNT(u);
825
826 assert(m);
827
828 if (m->state == MOUNT_MOUNTING_DONE)
829 return -EAGAIN;
830
831 assert(m->state == MOUNT_MOUNTED);
832
833 mount_enter_remounting(m, true);
834 return 0;
835}
836
a16e1123
LP		 837static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
838 Mount *m = MOUNT(u);
839
840 assert(m);
841 assert(f);
842 assert(fds);
843
844 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
845 unit_serialize_item(u, f, "failure", yes_no(m->failure));
846
847 if (m->control_pid > 0)
5925dd3c 848 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
a16e1123
LP		 849
850 if (m->control_command_id >= 0)
851 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
852
853 return 0;
854}
855
856static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
857 Mount *m = MOUNT(u);
858 int r;
859
860 assert(u);
861 assert(key);
862 assert(value);
863 assert(fds);
864
865 if (streq(key, "state")) {
866 MountState state;
867
868 if ((state = mount_state_from_string(value)) < 0)
869 log_debug("Failed to parse state value %s", value);
870 else
871 m->deserialized_state = state;
872 } else if (streq(key, "failure")) {
873 int b;
874
875 if ((b = parse_boolean(value)) < 0)
876 log_debug("Failed to parse failure value %s", value);
877 else
878 m->failure = b || m->failure;
879
880 } else if (streq(key, "control-pid")) {
5925dd3c 881 pid_t pid;
a16e1123 882
5925dd3c 883 if ((r = parse_pid(value, &pid)) < 0)
a16e1123
LP		 884 log_debug("Failed to parse control-pid value %s", value);
885 else
5925dd3c 886 m->control_pid = pid;
a16e1123
LP		 887 } else if (streq(key, "control-command")) {
888 MountExecCommand id;
889
890 if ((id = mount_exec_command_from_string(value)) < 0)
891 log_debug("Failed to parse exec-command value %s", value);
892 else {
893 m->control_command_id = id;
894 m->control_command = m->exec_command + id;
895 }
896
897 } else
898 log_debug("Unknown serialization key '%s'", key);
899
900 return 0;
901}
902
e537352b
LP		 903static UnitActiveState mount_active_state(Unit *u) {
904 assert(u);
905
906 return state_translation_table[MOUNT(u)->state];
907}
908
10a94420
LP		 909static const char *mount_sub_state_to_string(Unit *u) {
910 assert(u);
911
a16e1123 912 return mount_state_to_string(MOUNT(u)->state);
10a94420
LP		 913}
914
701cc384
LP		 915static bool mount_check_gc(Unit *u) {
916 Mount *m = MOUNT(u);
917
918 assert(m);
919
920 return m->from_etc_fstab || m->from_proc_self_mountinfo;
921}
922
e537352b
LP		 923static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
924 Mount *m = MOUNT(u);
925 bool success;
926
927 assert(m);
928 assert(pid >= 0);
929
8c47c732
LP		 930 if (pid != m->control_pid)
931 return;
e537352b 932
e537352b
LP		 933 m->control_pid = 0;
934
8c47c732
LP		 935 success = is_clean_exit(code, status);
936 m->failure = m->failure || !success;
937
a16e1123 938 if (m->control_command) {
b58b4116 939 exec_status_exit(&m->control_command->exec_status, pid, code, status);
a16e1123
LP		 940 m->control_command = NULL;
941 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
942 }
943
9e2f7c11 944 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
e537352b
LP		 945
946 /* Note that mount(8) returning and the kernel sending us a
947 * mount table change event might happen out-of-order. If an
948 * operation succeed we assume the kernel will follow soon too
949 * and already change into the resulting state. If it fails
950 * we check if the kernel still knows about the mount. and
951 * change state accordingly. */
952
953 switch (m->state) {
954
955 case MOUNT_MOUNTING:
956 case MOUNT_MOUNTING_DONE:
957 case MOUNT_MOUNTING_SIGKILL:
958 case MOUNT_MOUNTING_SIGTERM:
959 case MOUNT_REMOUNTING:
960 case MOUNT_REMOUNTING_SIGKILL:
961 case MOUNT_REMOUNTING_SIGTERM:
962
19b160fa 963 if (success)
e537352b
LP		 964 mount_enter_mounted(m, true);
965 else if (m->from_proc_self_mountinfo)
966 mount_enter_mounted(m, false);
967 else
968 mount_enter_dead(m, false);
969 break;
970
971 case MOUNT_UNMOUNTING:
972 case MOUNT_UNMOUNTING_SIGKILL:
973 case MOUNT_UNMOUNTING_SIGTERM:
974
975 if (success)
976 mount_enter_dead(m, true);
977 else if (m->from_proc_self_mountinfo)
978 mount_enter_mounted(m, false);
979 else
980 mount_enter_dead(m, false);
981 break;
982
983 default:
984 assert_not_reached("Uh, control process died at wrong time.");
985 }
986}
987
988static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
989 Mount *m = MOUNT(u);
990
991 assert(m);
992 assert(elapsed == 1);
993 assert(w == &m->timer_watch);
994
995 switch (m->state) {
996
997 case MOUNT_MOUNTING:
998 case MOUNT_MOUNTING_DONE:
9e2f7c11 999 log_warning("%s mounting timed out. Stopping.", u->meta.id);
e537352b
LP		 1000 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1001 break;
1002
1003 case MOUNT_REMOUNTING:
9e2f7c11 1004 log_warning("%s remounting timed out. Stopping.", u->meta.id);
e537352b
LP		 1005 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1006 break;
1007
1008 case MOUNT_UNMOUNTING:
9e2f7c11 1009 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
e537352b
LP		 1010 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1011 break;
1012
1013 case MOUNT_MOUNTING_SIGTERM:
9e2f7c11 1014 log_warning("%s mounting timed out. Killing.", u->meta.id);
e537352b
LP		 1015 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1016 break;
1017
1018 case MOUNT_REMOUNTING_SIGTERM:
9e2f7c11 1019 log_warning("%s remounting timed out. Killing.", u->meta.id);
e537352b
LP		 1020 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1021 break;
1022
1023 case MOUNT_UNMOUNTING_SIGTERM:
9e2f7c11 1024 log_warning("%s unmounting timed out. Killing.", u->meta.id);
e537352b
LP		 1025 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1026 break;
1027
1028 case MOUNT_MOUNTING_SIGKILL:
1029 case MOUNT_REMOUNTING_SIGKILL:
1030 case MOUNT_UNMOUNTING_SIGKILL:
9e2f7c11 1031 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
e537352b
LP		 1032
1033 if (m->from_proc_self_mountinfo)
1034 mount_enter_mounted(m, false);
1035 else
1036 mount_enter_dead(m, false);
1037 break;
1038
1039 default:
1040 assert_not_reached("Timeout at wrong time.");
1041 }
1042}
1043
1044static int mount_add_one(
1045 Manager *m,
1046 const char *what,
1047 const char *where,
1048 const char *options,
1049 const char *fstype,
1050 bool from_proc_self_mountinfo,
1051 bool set_flags) {
b08d03ff
LP		 1052 int r;
1053 Unit *u;
1054 bool delete;
e537352b 1055 char *e, *w = NULL, *o = NULL, *f = NULL;
4e85aff4 1056 MountParameters *p;
b08d03ff 1057
f50e0a01 1058 assert(m);
b08d03ff
LP		 1059 assert(what);
1060 assert(where);
e537352b
LP		 1061 assert(options);
1062 assert(fstype);
1063
1064 assert(!set_flags || from_proc_self_mountinfo);
1065
1066 /* Ignore API mount points. They should never be referenced in
1067 * dependencies ever. */
1068 if (mount_point_is_api(where))
1069 return 0;
b08d03ff 1070
8d567588
LP		 1071 if (streq(fstype, "autofs"))
1072 return 0;
1073
4e85aff4
LP		 1074 /* probably some kind of swap, ignore */
1075 if (!is_path(where))
b08d03ff
LP		 1076 return 0;
1077
a16e1123 1078 if (!(e = unit_name_from_path(where, ".mount")))
b08d03ff
LP		 1079 return -ENOMEM;
1080
1081 if (!(u = manager_get_unit(m, e))) {
1082 delete = true;
1083
1084 if (!(u = unit_new(m))) {
1085 free(e);
1086 return -ENOMEM;
1087 }
1088
1089 r = unit_add_name(u, e);
1090 free(e);
1091
1092 if (r < 0)
1093 goto fail;
1094
e537352b 1095 if (!(MOUNT(u)->where = strdup(where))) {
07b0b134
ML		 1096 r = -ENOMEM;
1097 goto fail;
1098 }
f50e0a01 1099
f94ea366 1100 unit_add_to_load_queue(u);
b08d03ff
LP		 1101 } else {
1102 delete = false;
1103 free(e);
1104 }
1105
e537352b
LP		 1106 if (!(w = strdup(what)) ||
1107 !(o = strdup(options)) ||
1108 !(f = strdup(fstype))) {
1109 r = -ENOMEM;
1110 goto fail;
1111 }
1112
1113 if (from_proc_self_mountinfo) {
4e85aff4 1114 p = &MOUNT(u)->parameters_proc_self_mountinfo;
e537352b
LP		 1115
1116 if (set_flags) {
1117 MOUNT(u)->is_mounted = true;
1118 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
4e85aff4 1119 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
e537352b 1120 }
ef734fd6 1121
f50e0a01 1122 MOUNT(u)->from_proc_self_mountinfo = true;
ef734fd6 1123 } else {
4e85aff4 1124 p = &MOUNT(u)->parameters_etc_fstab;
f50e0a01 1125 MOUNT(u)->from_etc_fstab = true;
ef734fd6 1126 }
f50e0a01 1127
4e85aff4
LP		 1128 free(p->what);
1129 p->what = w;
b08d03ff 1130
4e85aff4
LP		 1131 free(p->options);
1132 p->options = o;
e537352b 1133
4e85aff4
LP		 1134 free(p->fstype);
1135 p->fstype = f;
b08d03ff 1136
c1e1601e
LP		 1137 unit_add_to_dbus_queue(u);
1138
b08d03ff
LP		 1139 return 0;
1140
1141fail:
e537352b
LP		 1142 free(w);
1143 free(o);
1144 free(f);
1145
b08d03ff
LP		 1146 if (delete && u)
1147 unit_free(u);
1148
4e85aff4 1149 return r;
b08d03ff
LP		 1150}
1151
1152static char *fstab_node_to_udev_node(char *p) {
1153 char *dn, *t;
1154 int r;
1155
1156 /* FIXME: to follow udev's logic 100% we need to leave valid
1157 * UTF8 chars unescaped */
1158
1159 if (startswith(p, "LABEL=")) {
1160
f50e0a01 1161 if (!(t = xescape(p+6, "/ ")))
b08d03ff
LP		 1162 return NULL;
1163
f50e0a01 1164 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
b08d03ff
LP		 1165 free(t);
1166
1167 if (r < 0)
1168 return NULL;
1169
1170 return dn;
1171 }
1172
1173 if (startswith(p, "UUID=")) {
1174
f50e0a01 1175 if (!(t = xescape(p+5, "/ ")))
b08d03ff
LP		 1176 return NULL;
1177
f50e0a01 1178 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
b08d03ff
LP		 1179 free(t);
1180
1181 if (r < 0)
1182 return NULL;
1183
1184 return dn;
1185 }
1186
1187 return strdup(p);
1188}
1189
07b0b134
ML		 1190static int mount_find_pri(char *options) {
1191 char *end, *pri;
1192 unsigned long r;
1193
1194 if (!(pri = mount_test_option(options, "pri=")))
1195 return 0;
1196
1197 pri += 4;
1198
1199 errno = 0;
1200 r = strtoul(pri, &end, 10);
1201
1202 if (errno != 0)
1203 return -errno;
1204
1205 if (end == pri || (*end != ',' && *end != 0))
1206 return -EINVAL;
1207
1208 return (int) r;
1209}
1210
e537352b 1211static int mount_load_etc_fstab(Manager *m) {
b08d03ff
LP		 1212 FILE *f;
1213 int r;
1214 struct mntent* me;
1215
1216 assert(m);
1217
1218 errno = 0;
1219 if (!(f = setmntent("/etc/fstab", "r")))
1220 return -errno;
1221
1222 while ((me = getmntent(f))) {
1223 char *where, *what;
1224
1225 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1226 r = -ENOMEM;
1227 goto finish;
1228 }
1229
1230 if (!(where = strdup(me->mnt_dir))) {
1231 free(what);
1232 r = -ENOMEM;
1233 goto finish;
1234 }
1235
1236 if (what[0] == '/')
1237 path_kill_slashes(what);
1238
1239 if (where[0] == '/')
1240 path_kill_slashes(where);
1241
07b0b134
ML		 1242 if (streq(me->mnt_type, "swap")) {
1243 int pri;
1244
1245 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1246 r = pri;
1247 else
1248 r = swap_add_one(m,
1249 what,
07b0b134 1250 pri,
4e85aff4
LP		 1251 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1252 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
07b0b134
ML		 1253 false);
1254 } else
1255 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1256
b08d03ff
LP		 1257 free(what);
1258 free(where);
1259
1260 if (r < 0)
1261 goto finish;
1262 }
1263
1264 r = 0;
1265finish:
1266
1267 endmntent(f);
1268 return r;
1269}
1270
ef734fd6 1271static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
b08d03ff 1272 int r;
a2e0f3d3 1273 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
b08d03ff
LP		 1274
1275 assert(m);
1276
ef734fd6 1277 rewind(m->proc_self_mountinfo);
b08d03ff
LP		 1278
1279 for (;;) {
1280 int k;
e537352b 1281
a2e0f3d3 1282 device = path = options = options2 = fstype = d = p = o = NULL;
b08d03ff 1283
ef734fd6 1284 if ((k = fscanf(m->proc_self_mountinfo,
b08d03ff
LP		 1285 "%*s " /* (1) mount id */
1286 "%*s " /* (2) parent id */
1287 "%*s " /* (3) major:minor */
1288 "%*s " /* (4) root */
1289 "%ms " /* (5) mount point */
e537352b 1290 "%ms" /* (6) mount options */
b08d03ff
LP		 1291 "%*[^-]" /* (7) optional fields */
1292 "- " /* (8) seperator */
e537352b 1293 "%ms " /* (9) file system type */
ef734fd6 1294 "%ms" /* (10) mount source */
a2e0f3d3 1295 "%ms" /* (11) mount options 2 */
ef734fd6 1296 "%*[^\n]", /* some rubbish at the end */
b08d03ff 1297 &path,
e537352b
LP		 1298 &options,
1299 &fstype,
a2e0f3d3
LP		 1300 &device,
1301 &options2)) != 5) {
b08d03ff 1302
ef734fd6
LP		 1303 if (k == EOF)
1304 break;
b08d03ff 1305
e537352b
LP		 1306 r = -EBADMSG;
1307 goto finish;
b08d03ff
LP		 1308 }
1309
a2e0f3d3
LP		 1310 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1311 r = -ENOMEM;
1312 goto finish;
1313 }
1314
e537352b
LP		 1315 if (!(d = cunescape(device)) ||
1316 !(p = cunescape(path))) {
1317 r = -ENOMEM;
1318 goto finish;
b08d03ff 1319 }
b08d03ff 1320
a2e0f3d3 1321 if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
e537352b 1322 goto finish;
b08d03ff 1323
e537352b
LP		 1324 free(device);
1325 free(path);
1326 free(options);
a2e0f3d3 1327 free(options2);
e537352b 1328 free(fstype);
b08d03ff
LP		 1329 free(d);
1330 free(p);
a2e0f3d3 1331 free(o);
b08d03ff
LP		 1332 }
1333
e537352b
LP		 1334 r = 0;
1335
1336finish:
1337 free(device);
1338 free(path);
1339 free(options);
a2e0f3d3 1340 free(options2);
e537352b
LP		 1341 free(fstype);
1342 free(d);
1343 free(p);
a2e0f3d3 1344 free(o);
e537352b
LP		 1345
1346 return r;
1347}
1348
1349static void mount_shutdown(Manager *m) {
1350 assert(m);
1351
a16e1123 1352 if (m->proc_self_mountinfo) {
e537352b 1353 fclose(m->proc_self_mountinfo);
a16e1123
LP		 1354 m->proc_self_mountinfo = NULL;
1355 }
b08d03ff
LP		 1356}
1357
1358static int mount_enumerate(Manager *m) {
1359 int r;
ef734fd6 1360 struct epoll_event ev;
b08d03ff
LP		 1361 assert(m);
1362
a16e1123
LP		 1363 if (!m->proc_self_mountinfo) {
1364 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1365 return -errno;
ef734fd6 1366
a16e1123
LP		 1367 m->mount_watch.type = WATCH_MOUNT;
1368 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
ef734fd6 1369
a16e1123
LP		 1370 zero(ev);
1371 ev.events = EPOLLERR;
1372 ev.data.ptr = &m->mount_watch;
ef734fd6 1373
a16e1123
LP		 1374 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1375 return -errno;
1376 }
ef734fd6 1377
e537352b 1378 if ((r = mount_load_etc_fstab(m)) < 0)
b08d03ff
LP		 1379 goto fail;
1380
ef734fd6 1381 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
b08d03ff
LP		 1382 goto fail;
1383
1384 return 0;
1385
1386fail:
1387 mount_shutdown(m);
1388 return r;
5cb5a6ff
LP		 1389}
1390
ef734fd6
LP		 1391void mount_fd_event(Manager *m, int events) {
1392 Meta *meta;
1393 int r;
1394
1395 assert(m);
f94ea366 1396 assert(events == EPOLLERR);
ef734fd6
LP		 1397
1398 /* The manager calls this for every fd event happening on the
1399 * /proc/self/mountinfo file, which informs us about mounting
1400 * table changes */
1401
1402 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
d9a76d8f 1403 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(errno));
e537352b
LP		 1404
1405 /* Reset flags, just in case, for later calls */
1406 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1407 Mount *mount = (Mount*) meta;
1408
1409 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1410 }
1411
ef734fd6
LP		 1412 return;
1413 }
1414
1415 manager_dispatch_load_queue(m);
1416
1417 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1418 Mount *mount = (Mount*) meta;
1419
e537352b
LP		 1420 if (!mount->is_mounted) {
1421 /* This has just been unmounted. */
1422
ef734fd6 1423 mount->from_proc_self_mountinfo = false;
e537352b
LP		 1424
1425 switch (mount->state) {
1426
1427 case MOUNT_MOUNTED:
1428 mount_enter_dead(mount, true);
1429 break;
1430
1431 default:
1432 mount_set_state(mount, mount->state);
1433 break;
1434
1435 }
1436
1437 } else if (mount->just_mounted || mount->just_changed) {
1438
1439 /* New or changed entrymount */
1440
1441 switch (mount->state) {
1442
1443 case MOUNT_DEAD:
18c78fb1 1444 case MOUNT_MAINTENANCE:
e537352b
LP		 1445 mount_enter_mounted(mount, true);
1446 break;
1447
1448 case MOUNT_MOUNTING:
8d567588 1449 mount_enter_mounting_done(mount);
e537352b
LP		 1450 break;
1451
1452 default:
1453 /* Nothing really changed, but let's
1454 * issue an notification call
1455 * nonetheless, in case somebody is
1456 * waiting for this. (e.g. file system
1457 * ro/rw remounts.) */
1458 mount_set_state(mount, mount->state);
1459 break;
1460 }
1461 }
1462
1463 /* Reset the flags for later calls */
1464 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1465 }
1466}
1467
1468int mount_path_is_mounted(Manager *m, const char* path) {
1469 char *t;
1470 int r;
1471
1472 assert(m);
1473 assert(path);
1474
1475 if (path[0] != '/')
1476 return 1;
1477
1478 if (!(t = strdup(path)))
1479 return -ENOMEM;
1480
1481 path_kill_slashes(t);
1482
1483 for (;;) {
1484 char *e, *slash;
1485 Unit *u;
1486
a16e1123 1487 if (!(e = unit_name_from_path(t, ".mount"))) {
e537352b
LP		 1488 r = -ENOMEM;
1489 goto finish;
1490 }
1491
1492 u = manager_get_unit(m, e);
1493 free(e);
1494
1495 if (u &&
1496 (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1497 MOUNT(u)->state != MOUNT_MOUNTED) {
1498 r = 0;
1499 goto finish;
ef734fd6
LP		 1500 }
1501
e537352b
LP		 1502 assert_se(slash = strrchr(t, '/'));
1503
1504 if (slash == t) {
1505 r = 1;
1506 goto finish;
1507 }
1508
1509 *slash = 0;
ef734fd6 1510 }
e537352b
LP		 1511
1512 r = 1;
1513
1514finish:
1515 free(t);
1516 return r;
ef734fd6
LP		 1517}
1518
a16e1123
LP		 1519static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1520 [MOUNT_DEAD] = "dead",
1521 [MOUNT_MOUNTING] = "mounting",
1522 [MOUNT_MOUNTING_DONE] = "mounting-done",
1523 [MOUNT_MOUNTED] = "mounted",
1524 [MOUNT_REMOUNTING] = "remounting",
1525 [MOUNT_UNMOUNTING] = "unmounting",
1526 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1527 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1528 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1529 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1530 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1531 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
18c78fb1 1532 [MOUNT_MAINTENANCE] = "maintenance"
a16e1123
LP		 1533};
1534
1535DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1536
1537static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1538 [MOUNT_EXEC_MOUNT] = "ExecMount",
1539 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1540 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1541};
1542
1543DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1544
87f0e418 1545const UnitVTable mount_vtable = {
5cb5a6ff
LP		 1546 .suffix = ".mount",
1547
e537352b 1548 .no_alias = true,
9e2f7c11 1549 .no_instances = true,
c497c7a9 1550 .no_isolate = true,
9e58ff9c 1551 .show_status = true,
e537352b
LP		 1552
1553 .init = mount_init,
1554 .load = mount_load,
034c6ed7 1555 .done = mount_done,
e537352b 1556
f50e0a01
LP		 1557 .coldplug = mount_coldplug,
1558
034c6ed7 1559 .dump = mount_dump,
5cb5a6ff 1560
e537352b
LP		 1561 .start = mount_start,
1562 .stop = mount_stop,
1563 .reload = mount_reload,
1564
a16e1123
LP		 1565 .serialize = mount_serialize,
1566 .deserialize_item = mount_deserialize_item,
1567
f50e0a01 1568 .active_state = mount_active_state,
10a94420 1569 .sub_state_to_string = mount_sub_state_to_string,
b08d03ff 1570
701cc384
LP		 1571 .check_gc = mount_check_gc,
1572
e537352b
LP		 1573 .sigchld_event = mount_sigchld_event,
1574 .timer_event = mount_timer_event,
1575
4139c1b2
LP		 1576 .bus_message_handler = bus_mount_message_handler,
1577
f50e0a01
LP		 1578 .enumerate = mount_enumerate,
1579 .shutdown = mount_shutdown
5cb5a6ff 1580};
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