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[thirdparty/systemd.git] / src / mount.c
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d6c9574f 1/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
5cb5a6ff 2
a7334b09
LP		 3/***
4 This file is part of systemd.
5
6 Copyright 2010 Lennart Poettering
7
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20***/
21
5cb5a6ff 22#include <errno.h>
b08d03ff
LP		 23#include <stdio.h>
24#include <mntent.h>
ef734fd6 25#include <sys/epoll.h>
e537352b 26#include <signal.h>
5cb5a6ff 27
87f0e418 28#include "unit.h"
5cb5a6ff
LP		 29#include "mount.h"
30#include "load-fragment.h"
5cb5a6ff 31#include "load-dropin.h"
b08d03ff 32#include "log.h"
e537352b
LP		 33#include "strv.h"
34#include "mount-setup.h"
9e2f7c11 35#include "unit-name.h"
4139c1b2 36#include "dbus-mount.h"
514f4ef5 37#include "special.h"
8a0867d6 38#include "bus-errors.h"
9a57c629 39#include "exit-status.h"
f6a6225e 40#include "def.h"
5cb5a6ff 41
f50e0a01
LP		 42static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
43 [MOUNT_DEAD] = UNIT_INACTIVE,
44 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
e537352b 45 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
f50e0a01 46 [MOUNT_MOUNTED] = UNIT_ACTIVE,
032ff4af 47 [MOUNT_REMOUNTING] = UNIT_RELOADING,
f50e0a01 48 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
e537352b
LP		 49 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
50 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
032ff4af
LP		 51 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
52 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
e537352b
LP		 53 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
54 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
fdf20a31 55 [MOUNT_FAILED] = UNIT_FAILED
f50e0a01 56};
5cb5a6ff 57
a16e1123
LP		 58static void mount_init(Unit *u) {
59 Mount *m = MOUNT(u);
5cb5a6ff 60
a16e1123
LP		 61 assert(u);
62 assert(u->meta.load_state == UNIT_STUB);
63
64 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
3e5235b0
LP		 65 m->directory_mode = 0755;
66
c3686083 67 exec_context_init(&m->exec_context);
0a494f1f 68 m->exec_context.std_output = EXEC_OUTPUT_KMSG;
c3686083 69
a16e1123
LP		 70 /* We need to make sure that /bin/mount is always called in
71 * the same process group as us, so that the autofs kernel
72 * side doesn't send us another mount request while we are
73 * already trying to comply its last one. */
74922904 74 m->exec_context.same_pgrp = true;
8d567588 75
a16e1123
LP		 76 m->timer_watch.type = WATCH_INVALID;
77
78 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
8d567588
LP		 79}
80
a16e1123 81static void mount_unwatch_control_pid(Mount *m) {
5e94833f
LP		 82 assert(m);
83
84 if (m->control_pid <= 0)
85 return;
86
87 unit_unwatch_pid(UNIT(m), m->control_pid);
88 m->control_pid = 0;
89}
90
e537352b
LP		 91static void mount_parameters_done(MountParameters *p) {
92 assert(p);
93
94 free(p->what);
95 free(p->options);
96 free(p->fstype);
97
98 p->what = p->options = p->fstype = NULL;
99}
100
87f0e418 101static void mount_done(Unit *u) {
ef734fd6 102 Mount *m = MOUNT(u);
e0fa621b 103 Meta *other;
034c6ed7 104
ef734fd6 105 assert(m);
034c6ed7 106
e537352b
LP		 107 free(m->where);
108 m->where = NULL;
f50e0a01 109
e0fa621b
LP		 110 /* Try to detach us from the automount unit if there is any */
111 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT]) {
112 Automount *a = (Automount*) other;
113
114 if (a->mount == m)
115 a->mount = NULL;
116 }
117
e537352b
LP		 118 mount_parameters_done(&m->parameters_etc_fstab);
119 mount_parameters_done(&m->parameters_proc_self_mountinfo);
120 mount_parameters_done(&m->parameters_fragment);
ef734fd6 121
e537352b
LP		 122 exec_context_done(&m->exec_context);
123 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
124 m->control_command = NULL;
f50e0a01 125
a16e1123 126 mount_unwatch_control_pid(m);
f50e0a01 127
e537352b 128 unit_unwatch_timer(u, &m->timer_watch);
f50e0a01
LP		 129}
130
6e2ef85b
LP		 131static int mount_add_mount_links(Mount *m) {
132 Meta *other;
b08d03ff 133 int r;
5c78d8e2 134 MountParameters *pm;
b08d03ff 135
6e2ef85b 136 assert(m);
b08d03ff 137
5c78d8e2
LP		 138 if (m->from_fragment)
139 pm = &m->parameters_fragment;
140 else if (m->from_etc_fstab)
141 pm = &m->parameters_etc_fstab;
142 else
143 pm = NULL;
144
6e2ef85b
LP		 145 /* Adds in links to other mount points that might lie below or
146 * above us in the hierarchy */
e537352b 147
6e2ef85b
LP		 148 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
149 Mount *n = (Mount*) other;
5c78d8e2 150 MountParameters *pn;
07b0b134 151
6e2ef85b
LP		 152 if (n == m)
153 continue;
b08d03ff 154
6e2ef85b
LP		 155 if (n->meta.load_state != UNIT_LOADED)
156 continue;
b08d03ff 157
5c78d8e2
LP		 158 if (n->from_fragment)
159 pn = &n->parameters_fragment;
160 else if (n->from_etc_fstab)
161 pn = &n->parameters_etc_fstab;
162 else
163 pn = NULL;
164
6e2ef85b 165 if (path_startswith(m->where, n->where)) {
b08d03ff 166
6e2ef85b
LP		 167 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
168 return r;
b08d03ff 169
6e2ef85b
LP		 170 if (n->from_etc_fstab || n->from_fragment)
171 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
172 return r;
b08d03ff 173
6e2ef85b 174 } else if (path_startswith(n->where, m->where)) {
b08d03ff 175
5c78d8e2
LP		 176 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
177 return r;
178
179 if (m->from_etc_fstab || m->from_fragment)
180 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
181 return r;
182
183 } else if (pm && path_startswith(pm->what, n->where)) {
184
185 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
6e2ef85b
LP		 186 return r;
187
188 if (m->from_etc_fstab || m->from_fragment)
5c78d8e2
LP		 189 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
190 return r;
191
192 } else if (pn && path_startswith(pn->what, m->where)) {
193
194 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
195 return r;
196
197 if (n->from_etc_fstab || n->from_fragment)
6e2ef85b
LP		 198 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
199 return r;
200 }
201 }
b08d03ff
LP		 202
203 return 0;
204}
205
6e2ef85b 206static int mount_add_swap_links(Mount *m) {
ef734fd6 207 Meta *other;
b08d03ff
LP		 208 int r;
209
6e2ef85b 210 assert(m);
b08d03ff 211
6e2ef85b
LP		 212 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
213 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
214 return r;
b08d03ff 215
6e2ef85b
LP		 216 return 0;
217}
b08d03ff 218
01f78473
LP		 219static int mount_add_path_links(Mount *m) {
220 Meta *other;
221 int r;
222
223 assert(m);
224
225 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
226 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
227 return r;
228
229 return 0;
230}
231
6e2ef85b
LP		 232static int mount_add_automount_links(Mount *m) {
233 Meta *other;
234 int r;
e537352b 235
6e2ef85b 236 assert(m);
b08d03ff 237
6e2ef85b
LP		 238 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
239 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
240 return r;
b08d03ff 241
6e2ef85b
LP		 242 return 0;
243}
b08d03ff 244
6e2ef85b
LP		 245static int mount_add_socket_links(Mount *m) {
246 Meta *other;
247 int r;
b08d03ff 248
6e2ef85b 249 assert(m);
b08d03ff 250
6e2ef85b
LP		 251 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
252 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
253 return r;
b08d03ff
LP		 254
255 return 0;
256}
257
07b0b134 258static char* mount_test_option(const char *haystack, const char *needle) {
e537352b
LP		 259 struct mntent me;
260
261 assert(needle);
262
263 /* Like glibc's hasmntopt(), but works on a string, not a
264 * struct mntent */
265
266 if (!haystack)
267 return false;
268
269 zero(me);
270 me.mnt_opts = (char*) haystack;
271
07b0b134 272 return hasmntopt(&me, needle);
e537352b
LP		 273}
274
275static int mount_add_target_links(Mount *m) {
a55da3cd 276 const char *target, *after = NULL;
e537352b 277 MountParameters *p;
a16e1123 278 Unit *tu;
e537352b 279 int r;
d9143006 280 bool noauto, nofail, handle, automount;
e537352b
LP		 281
282 assert(m);
283
284 if (m->from_fragment)
285 p = &m->parameters_fragment;
286 else if (m->from_etc_fstab)
287 p = &m->parameters_etc_fstab;
288 else
289 return 0;
290
07b0b134 291 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
d9143006 292 nofail = !!mount_test_option(p->options, "nofail");
d4a7e06d
LP		 293 handle =
294 mount_test_option(p->options, "comment=systemd.mount") ||
295 mount_test_option(p->options, "x-systemd-mount") ||
d3689161 296 m->meta.manager->mount_auto;
d4a7e06d
LP		 297 automount =
298 mount_test_option(p->options, "comment=systemd.automount") ||
299 mount_test_option(p->options, "x-systemd-automount");
e537352b 300
e537352b 301 if (mount_test_option(p->options, "_netdev") ||
40b8a332 302 (p->fstype && fstype_is_network(p->fstype))) {
e537352b 303 target = SPECIAL_REMOTE_FS_TARGET;
a55da3cd
LP		 304
305 if (m->meta.manager->running_as == MANAGER_SYSTEM)
306 after = SPECIAL_NETWORK_TARGET;
307 } else
e537352b
LP		 308 target = SPECIAL_LOCAL_FS_TARGET;
309
398ef8ba 310 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
e537352b
LP		 311 return r;
312
a55da3cd 313 if (after)
50483512 314 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
a55da3cd
LP		 315 return r;
316
a3d4e06d 317 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
a16e1123
LP		 318 Unit *am;
319
320 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
9fcc065a 321 return r;
e537352b 322
2c966c03 323 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
a16e1123
LP		 324 } else {
325
81bf310e
LP		 326 /* Automatically add mount points that aren't natively
327 * configured to local-fs.target */
328 if (!noauto &&
d9143006 329 !nofail &&
81bf310e 330 handle &&
510051fc
LP		 331 m->from_etc_fstab &&
332 m->meta.manager->running_as == MANAGER_SYSTEM)
333 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
334 return r;
a16e1123 335
701cc384 336 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
a16e1123 337 }
e537352b
LP		 338}
339
5c78d8e2
LP		 340static bool mount_is_bind(MountParameters *p) {
341 assert(p);
342
343 if (p->fstype && streq(p->fstype, "bind"))
344 return true;
345
346 if (mount_test_option(p->options, "bind"))
347 return true;
348
349 return false;
350}
351
173a8d04
LP		 352static int mount_add_device_links(Mount *m) {
353 MountParameters *p;
9fff8a1f 354 int r;
173a8d04
LP		 355
356 assert(m);
357
358 if (m->from_fragment)
359 p = &m->parameters_fragment;
360 else if (m->from_etc_fstab)
361 p = &m->parameters_etc_fstab;
362 else
363 return 0;
364
9fff8a1f 365 if (!p->what)
173a8d04 366 return 0;
5c78d8e2 367
9fff8a1f
LP		 368 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
369 bool nofail, noauto;
173a8d04 370
9fff8a1f
LP		 371 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
372 nofail = !!mount_test_option(p->options, "nofail");
373
374 if ((r = unit_add_node_link(UNIT(m), p->what,
375 !noauto && nofail &&
376 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
377 return r;
378 }
379
491ad5dc 380 if (p->passno > 0 &&
ff2e0f05 381 !mount_is_bind(p) &&
b65a25f2
LP		 382 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
383 !path_equal(m->where, "/")) {
9fff8a1f
LP		 384 char *name;
385 Unit *fsck;
386 /* Let's add in the fsck service */
173a8d04 387
a9e1f5ec 388 /* aka SPECIAL_FSCK_SERVICE */
9fff8a1f
LP		 389 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
390 return -ENOMEM;
391
392 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
393 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
394 free(name);
395 return r;
396 }
397
398 free(name);
399
400 SERVICE(fsck)->fsck_passno = p->passno;
401
0355825f 402 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
9fff8a1f
LP		 403 return r;
404 }
405
406 return 0;
173a8d04
LP		 407}
408
2edd4434
LP		 409static int mount_add_default_dependencies(Mount *m) {
410 int r;
411
412 assert(m);
413
75d287d3
LP		 414 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
415 !path_equal(m->where, "/")) {
0c380104 416 MountParameters *p;
2edd4434 417
0c380104
AB		 418 if (m->from_fragment)
419 p = &m->parameters_fragment;
420 else if (m->from_etc_fstab)
421 p = &m->parameters_etc_fstab;
422 else
423 p = NULL;
424
425 if (!p ||
426 (!mount_test_option(p->options, "_netdev") &&
427 !(p->fstype && fstype_is_network(p->fstype)) &&
428 (mount_test_option(p->options, "usrquota") || mount_test_option(p->options, "grpquota"))))
429 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
430 (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
431 return r;
2edd4434 432
ead8e478 433 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
75d287d3 434 return r;
2edd4434
LP		 435 }
436
437 return 0;
438}
439
8d567588
LP		 440static int mount_verify(Mount *m) {
441 bool b;
442 char *e;
443 assert(m);
444
8cbef760 445 if (m->meta.load_state != UNIT_LOADED)
8d567588
LP		 446 return 0;
447
8cbef760
LP		 448 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
449 return -ENOENT;
450
a16e1123 451 if (!(e = unit_name_from_path(m->where, ".mount")))
8d567588
LP		 452 return -ENOMEM;
453
454 b = unit_has_name(UNIT(m), e);
455 free(e);
456
457 if (!b) {
4cd1fbcc 458 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
8d567588
LP		 459 return -EINVAL;
460 }
461
4e85aff4 462 if (m->meta.fragment_path && !m->parameters_fragment.what) {
4cd1fbcc 463 log_error("%s's What setting is missing. Refusing.", m->meta.id);
4e85aff4
LP		 464 return -EBADMSG;
465 }
466
2e22afe9 467 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
4d0e5dbd
LP		 468 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
469 return -EINVAL;
470 }
471
8d567588
LP		 472 return 0;
473}
474
e537352b
LP		 475static int mount_load(Unit *u) {
476 Mount *m = MOUNT(u);
477 int r;
478
479 assert(u);
480 assert(u->meta.load_state == UNIT_STUB);
481
482 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
483 return r;
484
485 /* This is a new unit? Then let's add in some extras */
486 if (u->meta.load_state == UNIT_LOADED) {
27abbe82
LP		 487 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
488 return r;
489
4e85aff4
LP		 490 if (m->meta.fragment_path)
491 m->from_fragment = true;
e537352b 492
a16e1123
LP		 493 if (!m->where)
494 if (!(m->where = unit_name_to_path(u->meta.id)))
495 return -ENOMEM;
496
497 path_kill_slashes(m->where);
498
4e85aff4
LP		 499 if (!m->meta.description)
500 if ((r = unit_set_description(u, m->where)) < 0)
501 return r;
e537352b 502
173a8d04
LP		 503 if ((r = mount_add_device_links(m)) < 0)
504 return r;
6e2ef85b
LP		 505
506 if ((r = mount_add_mount_links(m)) < 0)
507 return r;
508
509 if ((r = mount_add_socket_links(m)) < 0)
510 return r;
511
512 if ((r = mount_add_swap_links(m)) < 0)
e537352b
LP		 513 return r;
514
01f78473
LP		 515 if ((r = mount_add_path_links(m)) < 0)
516 return r;
517
6e2ef85b 518 if ((r = mount_add_automount_links(m)) < 0)
e537352b
LP		 519 return r;
520
6e2ef85b 521 if ((r = mount_add_target_links(m)) < 0)
e537352b
LP		 522 return r;
523
d686d8a9 524 if ((r = unit_add_default_cgroups(u)) < 0)
e537352b 525 return r;
4e67ddd6 526
2edd4434
LP		 527 if (m->meta.default_dependencies)
528 if ((r = mount_add_default_dependencies(m)) < 0)
4e67ddd6 529 return r;
e537352b
LP		 530 }
531
8d567588 532 return mount_verify(m);
e537352b
LP		 533}
534
a16e1123
LP		 535static int mount_notify_automount(Mount *m, int status) {
536 Unit *p;
537 int r;
538
539 assert(m);
540
541 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
542 return r == -ENOENT ? 0 : r;
543
544 return automount_send_ready(AUTOMOUNT(p), status);
545}
546
e537352b
LP		 547static void mount_set_state(Mount *m, MountState state) {
548 MountState old_state;
549 assert(m);
550
551 old_state = m->state;
552 m->state = state;
553
554 if (state != MOUNT_MOUNTING &&
555 state != MOUNT_MOUNTING_DONE &&
556 state != MOUNT_REMOUNTING &&
557 state != MOUNT_UNMOUNTING &&
558 state != MOUNT_MOUNTING_SIGTERM &&
559 state != MOUNT_MOUNTING_SIGKILL &&
560 state != MOUNT_UNMOUNTING_SIGTERM &&
561 state != MOUNT_UNMOUNTING_SIGKILL &&
562 state != MOUNT_REMOUNTING_SIGTERM &&
563 state != MOUNT_REMOUNTING_SIGKILL) {
564 unit_unwatch_timer(UNIT(m), &m->timer_watch);
a16e1123 565 mount_unwatch_control_pid(m);
e537352b 566 m->control_command = NULL;
a16e1123 567 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
e537352b
LP		 568 }
569
8d567588
LP		 570 if (state == MOUNT_MOUNTED ||
571 state == MOUNT_REMOUNTING)
572 mount_notify_automount(m, 0);
573 else if (state == MOUNT_DEAD ||
574 state == MOUNT_UNMOUNTING ||
575 state == MOUNT_MOUNTING_SIGTERM ||
576 state == MOUNT_MOUNTING_SIGKILL ||
577 state == MOUNT_REMOUNTING_SIGTERM ||
578 state == MOUNT_REMOUNTING_SIGKILL ||
579 state == MOUNT_UNMOUNTING_SIGTERM ||
580 state == MOUNT_UNMOUNTING_SIGKILL ||
fdf20a31 581 state == MOUNT_FAILED)
8d567588
LP		 582 mount_notify_automount(m, -ENODEV);
583
e537352b 584 if (state != old_state)
40d50879 585 log_debug("%s changed %s -> %s",
4cd1fbcc 586 m->meta.id,
a16e1123
LP		 587 mount_state_to_string(old_state),
588 mount_state_to_string(state));
e537352b 589
e2f3b44c
LP		 590 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
591 m->reload_failure = false;
e537352b
LP		 592}
593
594static int mount_coldplug(Unit *u) {
595 Mount *m = MOUNT(u);
a16e1123
LP		 596 MountState new_state = MOUNT_DEAD;
597 int r;
e537352b
LP		 598
599 assert(m);
600 assert(m->state == MOUNT_DEAD);
601
a16e1123
LP		 602 if (m->deserialized_state != m->state)
603 new_state = m->deserialized_state;
604 else if (m->from_proc_self_mountinfo)
605 new_state = MOUNT_MOUNTED;
e537352b 606
a16e1123 607 if (new_state != m->state) {
e537352b 608
a16e1123
LP		 609 if (new_state == MOUNT_MOUNTING ||
610 new_state == MOUNT_MOUNTING_DONE ||
611 new_state == MOUNT_REMOUNTING ||
612 new_state == MOUNT_UNMOUNTING ||
613 new_state == MOUNT_MOUNTING_SIGTERM ||
614 new_state == MOUNT_MOUNTING_SIGKILL ||
615 new_state == MOUNT_UNMOUNTING_SIGTERM ||
616 new_state == MOUNT_UNMOUNTING_SIGKILL ||
617 new_state == MOUNT_REMOUNTING_SIGTERM ||
618 new_state == MOUNT_REMOUNTING_SIGKILL) {
e537352b 619
a16e1123
LP		 620 if (m->control_pid <= 0)
621 return -EBADMSG;
e537352b 622
a16e1123
LP		 623 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
624 return r;
e537352b 625
a16e1123
LP		 626 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
627 return r;
628 }
e537352b 629
a16e1123
LP		 630 mount_set_state(m, new_state);
631 }
e537352b
LP		 632
633 return 0;
e537352b
LP		 634}
635
636static void mount_dump(Unit *u, FILE *f, const char *prefix) {
637 Mount *m = MOUNT(u);
638 MountParameters *p;
639
640 assert(m);
641 assert(f);
642
643 if (m->from_proc_self_mountinfo)
644 p = &m->parameters_proc_self_mountinfo;
645 else if (m->from_fragment)
646 p = &m->parameters_fragment;
647 else
648 p = &m->parameters_etc_fstab;
649
650 fprintf(f,
651 "%sMount State: %s\n"
652 "%sWhere: %s\n"
653 "%sWhat: %s\n"
654 "%sFile System Type: %s\n"
655 "%sOptions: %s\n"
656 "%sFrom /etc/fstab: %s\n"
657 "%sFrom /proc/self/mountinfo: %s\n"
658 "%sFrom fragment: %s\n"
3e5235b0 659 "%sDirectoryMode: %04o\n",
a16e1123 660 prefix, mount_state_to_string(m->state),
e537352b
LP		 661 prefix, m->where,
662 prefix, strna(p->what),
663 prefix, strna(p->fstype),
664 prefix, strna(p->options),
665 prefix, yes_no(m->from_etc_fstab),
666 prefix, yes_no(m->from_proc_self_mountinfo),
667 prefix, yes_no(m->from_fragment),
3e5235b0 668 prefix, m->directory_mode);
e537352b
LP		 669
670 if (m->control_pid > 0)
671 fprintf(f,
bb00e604
LP		 672 "%sControl PID: %lu\n",
673 prefix, (unsigned long) m->control_pid);
e537352b
LP		 674
675 exec_context_dump(&m->exec_context, f, prefix);
676}
677
a16e1123
LP		 678static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
679 pid_t pid;
680 int r;
681
682 assert(m);
683 assert(c);
684 assert(_pid);
685
686 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
687 goto fail;
688
689 if ((r = exec_spawn(c,
690 NULL,
691 &m->exec_context,
692 NULL, 0,
1137a57c 693 m->meta.manager->environment,
a16e1123
LP		 694 true,
695 true,
1e3ad081 696 true,
c3686083 697 m->meta.manager->confirm_spawn,
4cd1fbcc 698 m->meta.cgroup_bondings,
a16e1123
LP		 699 &pid)) < 0)
700 goto fail;
701
702 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
703 /* FIXME: we need to do something here */
704 goto fail;
705
706 *_pid = pid;
707
708 return 0;
709
710fail:
711 unit_unwatch_timer(UNIT(m), &m->timer_watch);
712
713 return r;
714}
715
e537352b
LP		 716static void mount_enter_dead(Mount *m, bool success) {
717 assert(m);
718
719 if (!success)
720 m->failure = true;
721
fdf20a31 722 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
e537352b
LP		 723}
724
80876c20
LP		 725static void mount_enter_mounted(Mount *m, bool success) {
726 assert(m);
727
728 if (!success)
729 m->failure = true;
730
731 mount_set_state(m, MOUNT_MOUNTED);
732}
733
e537352b
LP		 734static void mount_enter_signal(Mount *m, MountState state, bool success) {
735 int r;
ca949c9d
LP		 736 Set *pid_set = NULL;
737 bool wait_for_exit = false;
e537352b
LP		 738
739 assert(m);
740
741 if (!success)
742 m->failure = true;
743
2e22afe9 744 if (m->exec_context.kill_mode != KILL_NONE) {
80876c20
LP		 745 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
746 state == MOUNT_UNMOUNTING_SIGTERM ||
2e22afe9 747 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
e537352b 748
ca949c9d 749 if (m->control_pid > 0) {
cd25cce9 750 if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
e537352b 751
ca949c9d
LP		 752 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
753 else
754 wait_for_exit = true;
e537352b
LP		 755 }
756
ca949c9d 757 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
2e22afe9 758
ca949c9d
LP		 759 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
760 r = -ENOMEM;
e537352b
LP		 761 goto fail;
762 }
ca949c9d
LP		 763
764 /* Exclude the control pid from being killed via the cgroup */
765 if (m->control_pid > 0)
766 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
767 goto fail;
768
430c18ed 769 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
ca949c9d
LP		 770 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
771 log_warning("Failed to kill control group: %s", strerror(-r));
772 } else if (r > 0)
773 wait_for_exit = true;
774
775 set_free(pid_set);
776 }
e537352b
LP		 777 }
778
ca949c9d 779 if (wait_for_exit) {
80876c20
LP		 780 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
781 goto fail;
e537352b 782
80876c20
LP		 783 mount_set_state(m, state);
784 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
785 mount_enter_mounted(m, true);
786 else
e537352b
LP		 787 mount_enter_dead(m, true);
788
789 return;
790
791fail:
4cd1fbcc 792 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
e537352b 793
80876c20
LP		 794 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
795 mount_enter_mounted(m, false);
796 else
797 mount_enter_dead(m, false);
ca949c9d
LP		 798
799 if (pid_set)
800 set_free(pid_set);
e537352b
LP		 801}
802
803static void mount_enter_unmounting(Mount *m, bool success) {
e537352b
LP		 804 int r;
805
806 assert(m);
807
808 if (!success)
809 m->failure = true;
810
a16e1123
LP		 811 m->control_command_id = MOUNT_EXEC_UNMOUNT;
812 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
e537352b
LP		 813
814 if ((r = exec_command_set(
a16e1123 815 m->control_command,
e537352b
LP		 816 "/bin/umount",
817 m->where,
818 NULL)) < 0)
819 goto fail;
820
a16e1123 821 mount_unwatch_control_pid(m);
5e94833f 822
a16e1123 823 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
e537352b
LP		 824 goto fail;
825
826 mount_set_state(m, MOUNT_UNMOUNTING);
827
828 return;
829
830fail:
4cd1fbcc 831 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
e537352b
LP		 832 mount_enter_mounted(m, false);
833}
834
8d567588 835static void mount_enter_mounting(Mount *m) {
e537352b
LP		 836 int r;
837
838 assert(m);
839
a16e1123
LP		 840 m->control_command_id = MOUNT_EXEC_MOUNT;
841 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
e537352b 842
3e5235b0
LP		 843 mkdir_p(m->where, m->directory_mode);
844
2b583ce6
KS		 845 /* create the source directory for bind-mounts if needed */
846 if (m->parameters_fragment.fstype && strcmp(m->parameters_fragment.fstype, "bind") == 0)
847 mkdir_p(m->parameters_fragment.what, m->directory_mode);
848
e537352b
LP		 849 if (m->from_fragment)
850 r = exec_command_set(
a16e1123 851 m->control_command,
e537352b
LP		 852 "/bin/mount",
853 m->parameters_fragment.what,
854 m->where,
40b8a332 855 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
8d567588 856 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
e537352b
LP		 857 NULL);
858 else if (m->from_etc_fstab)
859 r = exec_command_set(
a16e1123 860 m->control_command,
e537352b
LP		 861 "/bin/mount",
862 m->where,
863 NULL);
864 else
865 r = -ENOENT;
866
867 if (r < 0)
868 goto fail;
869
a16e1123 870 mount_unwatch_control_pid(m);
5e94833f 871
a16e1123 872 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
e537352b
LP		 873 goto fail;
874
875 mount_set_state(m, MOUNT_MOUNTING);
876
877 return;
878
879fail:
4cd1fbcc 880 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
e537352b
LP		 881 mount_enter_dead(m, false);
882}
883
8d567588 884static void mount_enter_mounting_done(Mount *m) {
e537352b
LP		 885 assert(m);
886
e537352b
LP		 887 mount_set_state(m, MOUNT_MOUNTING_DONE);
888}
889
890static void mount_enter_remounting(Mount *m, bool success) {
e537352b
LP		 891 int r;
892
893 assert(m);
894
895 if (!success)
896 m->failure = true;
897
a16e1123
LP		 898 m->control_command_id = MOUNT_EXEC_REMOUNT;
899 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
e537352b
LP		 900
901 if (m->from_fragment) {
902 char *buf = NULL;
903 const char *o;
904
905 if (m->parameters_fragment.options) {
906 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
907 r = -ENOMEM;
908 goto fail;
909 }
910
911 o = buf;
912 } else
913 o = "remount";
914
915 r = exec_command_set(
a16e1123 916 m->control_command,
e537352b
LP		 917 "/bin/mount",
918 m->parameters_fragment.what,
919 m->where,
40b8a332 920 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
e537352b
LP		 921 "-o", o,
922 NULL);
923
924 free(buf);
925 } else if (m->from_etc_fstab)
926 r = exec_command_set(
a16e1123 927 m->control_command,
e537352b
LP		 928 "/bin/mount",
929 m->where,
930 "-o", "remount",
931 NULL);
932 else
933 r = -ENOENT;
934
60b912f6 935 if (r < 0)
e537352b 936 goto fail;
e537352b 937
a16e1123 938 mount_unwatch_control_pid(m);
5e94833f 939
a16e1123 940 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
e537352b
LP		 941 goto fail;
942
943 mount_set_state(m, MOUNT_REMOUNTING);
944
945 return;
946
947fail:
e364ad06 948 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
e2f3b44c
LP		 949 m->reload_failure = true;
950 mount_enter_mounted(m, true);
e537352b
LP		 951}
952
953static int mount_start(Unit *u) {
954 Mount *m = MOUNT(u);
955
956 assert(m);
957
958 /* We cannot fulfill this request right now, try again later
959 * please! */
960 if (m->state == MOUNT_UNMOUNTING ||
961 m->state == MOUNT_UNMOUNTING_SIGTERM ||
60b912f6
LP		 962 m->state == MOUNT_UNMOUNTING_SIGKILL ||
963 m->state == MOUNT_MOUNTING_SIGTERM ||
964 m->state == MOUNT_MOUNTING_SIGKILL)
e537352b
LP		 965 return -EAGAIN;
966
967 /* Already on it! */
60b912f6 968 if (m->state == MOUNT_MOUNTING)
e537352b
LP		 969 return 0;
970
fdf20a31 971 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
e537352b
LP		 972
973 m->failure = false;
8d567588 974 mount_enter_mounting(m);
e537352b
LP		 975 return 0;
976}
977
978static int mount_stop(Unit *u) {
979 Mount *m = MOUNT(u);
980
981 assert(m);
982
e537352b
LP		 983 /* Already on it */
984 if (m->state == MOUNT_UNMOUNTING ||
985 m->state == MOUNT_UNMOUNTING_SIGKILL ||
60b912f6
LP		 986 m->state == MOUNT_UNMOUNTING_SIGTERM ||
987 m->state == MOUNT_MOUNTING_SIGTERM ||
988 m->state == MOUNT_MOUNTING_SIGKILL)
e537352b
LP		 989 return 0;
990
3f6c78dc
LP		 991 assert(m->state == MOUNT_MOUNTING ||
992 m->state == MOUNT_MOUNTING_DONE ||
993 m->state == MOUNT_MOUNTED ||
3f6c78dc
LP		 994 m->state == MOUNT_REMOUNTING ||
995 m->state == MOUNT_REMOUNTING_SIGTERM ||
996 m->state == MOUNT_REMOUNTING_SIGKILL);
e537352b
LP		 997
998 mount_enter_unmounting(m, true);
999 return 0;
1000}
1001
1002static int mount_reload(Unit *u) {
1003 Mount *m = MOUNT(u);
1004
1005 assert(m);
1006
1007 if (m->state == MOUNT_MOUNTING_DONE)
1008 return -EAGAIN;
1009
1010 assert(m->state == MOUNT_MOUNTED);
1011
1012 mount_enter_remounting(m, true);
1013 return 0;
1014}
1015
a16e1123
LP		 1016static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1017 Mount *m = MOUNT(u);
1018
1019 assert(m);
1020 assert(f);
1021 assert(fds);
1022
1023 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1024 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1025
1026 if (m->control_pid > 0)
5925dd3c 1027 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
a16e1123
LP		 1028
1029 if (m->control_command_id >= 0)
1030 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1031
1032 return 0;
1033}
1034
1035static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1036 Mount *m = MOUNT(u);
a16e1123
LP		 1037
1038 assert(u);
1039 assert(key);
1040 assert(value);
1041 assert(fds);
1042
1043 if (streq(key, "state")) {
1044 MountState state;
1045
1046 if ((state = mount_state_from_string(value)) < 0)
1047 log_debug("Failed to parse state value %s", value);
1048 else
1049 m->deserialized_state = state;
1050 } else if (streq(key, "failure")) {
1051 int b;
1052
1053 if ((b = parse_boolean(value)) < 0)
1054 log_debug("Failed to parse failure value %s", value);
1055 else
1056 m->failure = b || m->failure;
1057
1058 } else if (streq(key, "control-pid")) {
5925dd3c 1059 pid_t pid;
a16e1123 1060
e364ad06 1061 if (parse_pid(value, &pid) < 0)
a16e1123
LP		 1062 log_debug("Failed to parse control-pid value %s", value);
1063 else
5925dd3c 1064 m->control_pid = pid;
a16e1123
LP		 1065 } else if (streq(key, "control-command")) {
1066 MountExecCommand id;
1067
1068 if ((id = mount_exec_command_from_string(value)) < 0)
1069 log_debug("Failed to parse exec-command value %s", value);
1070 else {
1071 m->control_command_id = id;
1072 m->control_command = m->exec_command + id;
1073 }
1074
1075 } else
1076 log_debug("Unknown serialization key '%s'", key);
1077
1078 return 0;
1079}
1080
e537352b
LP		 1081static UnitActiveState mount_active_state(Unit *u) {
1082 assert(u);
1083
1084 return state_translation_table[MOUNT(u)->state];
1085}
1086
10a94420
LP		 1087static const char *mount_sub_state_to_string(Unit *u) {
1088 assert(u);
1089
a16e1123 1090 return mount_state_to_string(MOUNT(u)->state);
10a94420
LP		 1091}
1092
701cc384
LP		 1093static bool mount_check_gc(Unit *u) {
1094 Mount *m = MOUNT(u);
1095
1096 assert(m);
1097
1098 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1099}
1100
e537352b
LP		 1101static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1102 Mount *m = MOUNT(u);
1103 bool success;
1104
1105 assert(m);
1106 assert(pid >= 0);
1107
8c47c732
LP		 1108 if (pid != m->control_pid)
1109 return;
e537352b 1110
e537352b
LP		 1111 m->control_pid = 0;
1112
8c47c732
LP		 1113 success = is_clean_exit(code, status);
1114 m->failure = m->failure || !success;
1115
a16e1123 1116 if (m->control_command) {
169c1bda 1117 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
a16e1123
LP		 1118 m->control_command = NULL;
1119 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1120 }
1121
92abbefb
LP		 1122 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1123 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
e537352b
LP		 1124
1125 /* Note that mount(8) returning and the kernel sending us a
1126 * mount table change event might happen out-of-order. If an
1127 * operation succeed we assume the kernel will follow soon too
1128 * and already change into the resulting state. If it fails
1129 * we check if the kernel still knows about the mount. and
1130 * change state accordingly. */
1131
1132 switch (m->state) {
1133
1134 case MOUNT_MOUNTING:
1135 case MOUNT_MOUNTING_DONE:
1136 case MOUNT_MOUNTING_SIGKILL:
1137 case MOUNT_MOUNTING_SIGTERM:
e537352b 1138
19b160fa 1139 if (success)
e537352b
LP		 1140 mount_enter_mounted(m, true);
1141 else if (m->from_proc_self_mountinfo)
1142 mount_enter_mounted(m, false);
1143 else
1144 mount_enter_dead(m, false);
1145 break;
1146
e2f3b44c
LP		 1147 case MOUNT_REMOUNTING:
1148 case MOUNT_REMOUNTING_SIGKILL:
1149 case MOUNT_REMOUNTING_SIGTERM:
1150
1151 m->reload_failure = !success;
1152 if (m->from_proc_self_mountinfo)
1153 mount_enter_mounted(m, true);
1154 else
1155 mount_enter_dead(m, true);
1156
1157 break;
1158
e537352b
LP		 1159 case MOUNT_UNMOUNTING:
1160 case MOUNT_UNMOUNTING_SIGKILL:
1161 case MOUNT_UNMOUNTING_SIGTERM:
1162
1163 if (success)
1164 mount_enter_dead(m, true);
1165 else if (m->from_proc_self_mountinfo)
1166 mount_enter_mounted(m, false);
1167 else
1168 mount_enter_dead(m, false);
1169 break;
1170
1171 default:
1172 assert_not_reached("Uh, control process died at wrong time.");
1173 }
c4e2ceae
LP		 1174
1175 /* Notify clients about changed exit status */
1176 unit_add_to_dbus_queue(u);
e537352b
LP		 1177}
1178
1179static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1180 Mount *m = MOUNT(u);
1181
1182 assert(m);
1183 assert(elapsed == 1);
1184 assert(w == &m->timer_watch);
1185
1186 switch (m->state) {
1187
1188 case MOUNT_MOUNTING:
1189 case MOUNT_MOUNTING_DONE:
9e2f7c11 1190 log_warning("%s mounting timed out. Stopping.", u->meta.id);
e537352b
LP		 1191 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1192 break;
1193
1194 case MOUNT_REMOUNTING:
9e2f7c11 1195 log_warning("%s remounting timed out. Stopping.", u->meta.id);
e2f3b44c
LP		 1196 m->reload_failure = true;
1197 mount_enter_mounted(m, true);
e537352b
LP		 1198 break;
1199
1200 case MOUNT_UNMOUNTING:
9e2f7c11 1201 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
e537352b
LP		 1202 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1203 break;
1204
1205 case MOUNT_MOUNTING_SIGTERM:
ba035df2
LP		 1206 if (m->exec_context.send_sigkill) {
1207 log_warning("%s mounting timed out. Killing.", u->meta.id);
1208 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1209 } else {
1210 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1211
1212 if (m->from_proc_self_mountinfo)
1213 mount_enter_mounted(m, false);
1214 else
1215 mount_enter_dead(m, false);
1216 }
e537352b
LP		 1217 break;
1218
1219 case MOUNT_REMOUNTING_SIGTERM:
ba035df2
LP		 1220 if (m->exec_context.send_sigkill) {
1221 log_warning("%s remounting timed out. Killing.", u->meta.id);
1222 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1223 } else {
1224 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1225
1226 if (m->from_proc_self_mountinfo)
1227 mount_enter_mounted(m, false);
1228 else
1229 mount_enter_dead(m, false);
1230 }
e537352b
LP		 1231 break;
1232
1233 case MOUNT_UNMOUNTING_SIGTERM:
ba035df2
LP		 1234 if (m->exec_context.send_sigkill) {
1235 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1236 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1237 } else {
1238 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1239
1240 if (m->from_proc_self_mountinfo)
1241 mount_enter_mounted(m, false);
1242 else
1243 mount_enter_dead(m, false);
1244 }
e537352b
LP		 1245 break;
1246
1247 case MOUNT_MOUNTING_SIGKILL:
1248 case MOUNT_REMOUNTING_SIGKILL:
1249 case MOUNT_UNMOUNTING_SIGKILL:
9e2f7c11 1250 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
e537352b
LP		 1251
1252 if (m->from_proc_self_mountinfo)
1253 mount_enter_mounted(m, false);
1254 else
1255 mount_enter_dead(m, false);
1256 break;
1257
1258 default:
1259 assert_not_reached("Timeout at wrong time.");
1260 }
1261}
1262
1263static int mount_add_one(
1264 Manager *m,
1265 const char *what,
1266 const char *where,
1267 const char *options,
1268 const char *fstype,
9fff8a1f 1269 int passno,
e537352b
LP		 1270 bool from_proc_self_mountinfo,
1271 bool set_flags) {
b08d03ff
LP		 1272 int r;
1273 Unit *u;
1274 bool delete;
e537352b 1275 char *e, *w = NULL, *o = NULL, *f = NULL;
4e85aff4 1276 MountParameters *p;
b08d03ff 1277
f50e0a01 1278 assert(m);
b08d03ff
LP		 1279 assert(what);
1280 assert(where);
e537352b
LP		 1281 assert(options);
1282 assert(fstype);
1283
1284 assert(!set_flags || from_proc_self_mountinfo);
1285
1286 /* Ignore API mount points. They should never be referenced in
1287 * dependencies ever. */
1288 if (mount_point_is_api(where))
1289 return 0;
57f2a956
KS		 1290 if (mount_point_ignore(where))
1291 return 0;
b08d03ff 1292
8d567588
LP		 1293 if (streq(fstype, "autofs"))
1294 return 0;
1295
4e85aff4
LP		 1296 /* probably some kind of swap, ignore */
1297 if (!is_path(where))
b08d03ff
LP		 1298 return 0;
1299
a16e1123 1300 if (!(e = unit_name_from_path(where, ".mount")))
b08d03ff
LP		 1301 return -ENOMEM;
1302
1303 if (!(u = manager_get_unit(m, e))) {
1304 delete = true;
1305
1306 if (!(u = unit_new(m))) {
1307 free(e);
1308 return -ENOMEM;
1309 }
1310
1311 r = unit_add_name(u, e);
1312 free(e);
1313
1314 if (r < 0)
1315 goto fail;
1316
e537352b 1317 if (!(MOUNT(u)->where = strdup(where))) {
07b0b134
ML		 1318 r = -ENOMEM;
1319 goto fail;
1320 }
f50e0a01 1321
f94ea366 1322 unit_add_to_load_queue(u);
b08d03ff
LP		 1323 } else {
1324 delete = false;
1325 free(e);
1326 }
1327
e537352b
LP		 1328 if (!(w = strdup(what)) ||
1329 !(o = strdup(options)) ||
1330 !(f = strdup(fstype))) {
1331 r = -ENOMEM;
1332 goto fail;
1333 }
1334
1335 if (from_proc_self_mountinfo) {
4e85aff4 1336 p = &MOUNT(u)->parameters_proc_self_mountinfo;
e537352b
LP		 1337
1338 if (set_flags) {
1339 MOUNT(u)->is_mounted = true;
1340 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
4e85aff4 1341 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
e537352b 1342 }
ef734fd6 1343
f50e0a01 1344 MOUNT(u)->from_proc_self_mountinfo = true;
ef734fd6 1345 } else {
4e85aff4 1346 p = &MOUNT(u)->parameters_etc_fstab;
f50e0a01 1347 MOUNT(u)->from_etc_fstab = true;
ef734fd6 1348 }
f50e0a01 1349
4e85aff4
LP		 1350 free(p->what);
1351 p->what = w;
b08d03ff 1352
4e85aff4
LP		 1353 free(p->options);
1354 p->options = o;
e537352b 1355
4e85aff4
LP		 1356 free(p->fstype);
1357 p->fstype = f;
b08d03ff 1358
9fff8a1f
LP		 1359 p->passno = passno;
1360
c1e1601e
LP		 1361 unit_add_to_dbus_queue(u);
1362
b08d03ff
LP		 1363 return 0;
1364
1365fail:
e537352b
LP		 1366 free(w);
1367 free(o);
1368 free(f);
1369
b08d03ff
LP		 1370 if (delete && u)
1371 unit_free(u);
1372
4e85aff4 1373 return r;
b08d03ff
LP		 1374}
1375
07b0b134
ML		 1376static int mount_find_pri(char *options) {
1377 char *end, *pri;
1378 unsigned long r;
1379
1380 if (!(pri = mount_test_option(options, "pri=")))
1381 return 0;
1382
1383 pri += 4;
1384
1385 errno = 0;
1386 r = strtoul(pri, &end, 10);
1387
1388 if (errno != 0)
1389 return -errno;
1390
1391 if (end == pri || (*end != ',' && *end != 0))
1392 return -EINVAL;
1393
1394 return (int) r;
1395}
1396
e537352b 1397static int mount_load_etc_fstab(Manager *m) {
b08d03ff 1398 FILE *f;
60b912f6 1399 int r = 0;
b08d03ff
LP		 1400 struct mntent* me;
1401
1402 assert(m);
1403
1404 errno = 0;
1405 if (!(f = setmntent("/etc/fstab", "r")))
1406 return -errno;
1407
1408 while ((me = getmntent(f))) {
1409 char *where, *what;
60b912f6 1410 int k;
b08d03ff
LP		 1411
1412 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1413 r = -ENOMEM;
1414 goto finish;
1415 }
1416
1417 if (!(where = strdup(me->mnt_dir))) {
1418 free(what);
1419 r = -ENOMEM;
1420 goto finish;
1421 }
1422
1423 if (what[0] == '/')
1424 path_kill_slashes(what);
1425
1426 if (where[0] == '/')
1427 path_kill_slashes(where);
1428
07b0b134
ML		 1429 if (streq(me->mnt_type, "swap")) {
1430 int pri;
1431
1432 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
60b912f6 1433 k = pri;
07b0b134 1434 else
60b912f6 1435 k = swap_add_one(m,
07b0b134 1436 what,
60b912f6 1437 NULL,
07b0b134 1438 pri,
4e85aff4 1439 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
173a8d04 1440 !!mount_test_option(me->mnt_opts, "nofail"),
4e85aff4 1441 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
07b0b134
ML		 1442 false);
1443 } else
9fff8a1f 1444 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
07b0b134 1445
b08d03ff
LP		 1446 free(what);
1447 free(where);
1448
1449 if (r < 0)
60b912f6 1450 r = k;
b08d03ff
LP		 1451 }
1452
b08d03ff
LP		 1453finish:
1454
1455 endmntent(f);
1456 return r;
1457}
1458
ef734fd6 1459static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
60b912f6 1460 int r = 0;
1ddff895 1461 unsigned i;
a2e0f3d3 1462 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
b08d03ff
LP		 1463
1464 assert(m);
1465
ef734fd6 1466 rewind(m->proc_self_mountinfo);
b08d03ff 1467
1ddff895 1468 for (i = 1;; i++) {
b08d03ff 1469 int k;
e537352b 1470
a2e0f3d3 1471 device = path = options = options2 = fstype = d = p = o = NULL;
b08d03ff 1472
ef734fd6 1473 if ((k = fscanf(m->proc_self_mountinfo,
b08d03ff
LP		 1474 "%*s " /* (1) mount id */
1475 "%*s " /* (2) parent id */
1476 "%*s " /* (3) major:minor */
1477 "%*s " /* (4) root */
1478 "%ms " /* (5) mount point */
e537352b 1479 "%ms" /* (6) mount options */
b08d03ff 1480 "%*[^-]" /* (7) optional fields */
c899f8c6 1481 "- " /* (8) separator */
e537352b 1482 "%ms " /* (9) file system type */
ef734fd6 1483 "%ms" /* (10) mount source */
a2e0f3d3 1484 "%ms" /* (11) mount options 2 */
ef734fd6 1485 "%*[^\n]", /* some rubbish at the end */
b08d03ff 1486 &path,
e537352b
LP		 1487 &options,
1488 &fstype,
a2e0f3d3
LP		 1489 &device,
1490 &options2)) != 5) {
b08d03ff 1491
ef734fd6
LP		 1492 if (k == EOF)
1493 break;
b08d03ff 1494
1ddff895
FF		 1495 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1496 goto clean_up;
b08d03ff
LP		 1497 }
1498
a2e0f3d3
LP		 1499 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1500 r = -ENOMEM;
1501 goto finish;
1502 }
1503
e537352b
LP		 1504 if (!(d = cunescape(device)) ||
1505 !(p = cunescape(path))) {
1506 r = -ENOMEM;
1507 goto finish;
b08d03ff 1508 }
b08d03ff 1509
9fff8a1f 1510 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
60b912f6 1511 r = k;
b08d03ff 1512
1ddff895 1513clean_up:
e537352b
LP		 1514 free(device);
1515 free(path);
1516 free(options);
a2e0f3d3 1517 free(options2);
e537352b 1518 free(fstype);
b08d03ff
LP		 1519 free(d);
1520 free(p);
a2e0f3d3 1521 free(o);
b08d03ff
LP		 1522 }
1523
e537352b
LP		 1524finish:
1525 free(device);
1526 free(path);
1527 free(options);
a2e0f3d3 1528 free(options2);
e537352b
LP		 1529 free(fstype);
1530 free(d);
1531 free(p);
a2e0f3d3 1532 free(o);
e537352b
LP		 1533
1534 return r;
1535}
1536
1537static void mount_shutdown(Manager *m) {
1538 assert(m);
1539
a16e1123 1540 if (m->proc_self_mountinfo) {
e537352b 1541 fclose(m->proc_self_mountinfo);
a16e1123
LP		 1542 m->proc_self_mountinfo = NULL;
1543 }
b08d03ff
LP		 1544}
1545
1546static int mount_enumerate(Manager *m) {
1547 int r;
ef734fd6 1548 struct epoll_event ev;
b08d03ff
LP		 1549 assert(m);
1550
a16e1123
LP		 1551 if (!m->proc_self_mountinfo) {
1552 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1553 return -errno;
ef734fd6 1554
a16e1123
LP		 1555 m->mount_watch.type = WATCH_MOUNT;
1556 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
ef734fd6 1557
a16e1123 1558 zero(ev);
4e434314 1559 ev.events = EPOLLPRI;
a16e1123 1560 ev.data.ptr = &m->mount_watch;
ef734fd6 1561
a16e1123
LP		 1562 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1563 return -errno;
1564 }
ef734fd6 1565
e537352b 1566 if ((r = mount_load_etc_fstab(m)) < 0)
b08d03ff
LP		 1567 goto fail;
1568
ef734fd6 1569 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
b08d03ff
LP		 1570 goto fail;
1571
1572 return 0;
1573
1574fail:
1575 mount_shutdown(m);
1576 return r;
5cb5a6ff
LP		 1577}
1578
ef734fd6
LP		 1579void mount_fd_event(Manager *m, int events) {
1580 Meta *meta;
1581 int r;
1582
1583 assert(m);
4e434314 1584 assert(events & EPOLLPRI);
ef734fd6
LP		 1585
1586 /* The manager calls this for every fd event happening on the
1587 * /proc/self/mountinfo file, which informs us about mounting
1588 * table changes */
1589
1590 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
e364ad06 1591 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
e537352b
LP		 1592
1593 /* Reset flags, just in case, for later calls */
1594 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1595 Mount *mount = (Mount*) meta;
1596
1597 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1598 }
1599
ef734fd6
LP		 1600 return;
1601 }
1602
1603 manager_dispatch_load_queue(m);
1604
1605 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1606 Mount *mount = (Mount*) meta;
1607
e537352b
LP		 1608 if (!mount->is_mounted) {
1609 /* This has just been unmounted. */
1610
ef734fd6 1611 mount->from_proc_self_mountinfo = false;
e537352b
LP		 1612
1613 switch (mount->state) {
1614
1615 case MOUNT_MOUNTED:
1616 mount_enter_dead(mount, true);
1617 break;
1618
1619 default:
1620 mount_set_state(mount, mount->state);
1621 break;
1622
1623 }
1624
1625 } else if (mount->just_mounted || mount->just_changed) {
1626
60b912f6 1627 /* New or changed mount entry */
e537352b
LP		 1628
1629 switch (mount->state) {
1630
1631 case MOUNT_DEAD:
fdf20a31 1632 case MOUNT_FAILED:
e537352b
LP		 1633 mount_enter_mounted(mount, true);
1634 break;
1635
1636 case MOUNT_MOUNTING:
8d567588 1637 mount_enter_mounting_done(mount);
e537352b
LP		 1638 break;
1639
1640 default:
1641 /* Nothing really changed, but let's
1642 * issue an notification call
1643 * nonetheless, in case somebody is
1644 * waiting for this. (e.g. file system
1645 * ro/rw remounts.) */
1646 mount_set_state(mount, mount->state);
1647 break;
1648 }
1649 }
1650
1651 /* Reset the flags for later calls */
1652 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1653 }
1654}
1655
fdf20a31 1656static void mount_reset_failed(Unit *u) {
5632e374
LP		 1657 Mount *m = MOUNT(u);
1658
1659 assert(m);
1660
fdf20a31 1661 if (m->state == MOUNT_FAILED)
5632e374
LP		 1662 mount_set_state(m, MOUNT_DEAD);
1663
1664 m->failure = false;
1665}
1666
8a0867d6
LP		 1667static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1668 Mount *m = MOUNT(u);
1669 int r = 0;
1670 Set *pid_set = NULL;
1671
1672 assert(m);
1673
1674 if (who == KILL_MAIN) {
1675 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1676 return -EINVAL;
1677 }
1678
1679 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1680 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1681 return -ENOENT;
1682 }
1683
1684 if (m->control_pid > 0)
cd25cce9 1685 if (kill(m->control_pid, signo) < 0)
8a0867d6
LP		 1686 r = -errno;
1687
1688 if (mode == KILL_CONTROL_GROUP) {
1689 int q;
1690
1691 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1692 return -ENOMEM;
1693
1694 /* Exclude the control pid from being killed via the cgroup */
1695 if (m->control_pid > 0)
1696 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1697 r = q;
1698 goto finish;
1699 }
1700
430c18ed 1701 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
8a0867d6
LP		 1702 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1703 r = q;
1704 }
1705
1706finish:
1707 if (pid_set)
1708 set_free(pid_set);
1709
1710 return r;
1711}
1712
a16e1123
LP		 1713static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1714 [MOUNT_DEAD] = "dead",
1715 [MOUNT_MOUNTING] = "mounting",
1716 [MOUNT_MOUNTING_DONE] = "mounting-done",
1717 [MOUNT_MOUNTED] = "mounted",
1718 [MOUNT_REMOUNTING] = "remounting",
1719 [MOUNT_UNMOUNTING] = "unmounting",
1720 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1721 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1722 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1723 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1724 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1725 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
fdf20a31 1726 [MOUNT_FAILED] = "failed"
a16e1123
LP		 1727};
1728
1729DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1730
1731static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1732 [MOUNT_EXEC_MOUNT] = "ExecMount",
1733 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1734 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1735};
1736
1737DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1738
87f0e418 1739const UnitVTable mount_vtable = {
5cb5a6ff
LP		 1740 .suffix = ".mount",
1741
e537352b 1742 .no_alias = true,
9e2f7c11 1743 .no_instances = true,
c497c7a9 1744 .no_isolate = true,
9e58ff9c 1745 .show_status = true,
e537352b
LP		 1746
1747 .init = mount_init,
1748 .load = mount_load,
034c6ed7 1749 .done = mount_done,
e537352b 1750
f50e0a01
LP		 1751 .coldplug = mount_coldplug,
1752
034c6ed7 1753 .dump = mount_dump,
5cb5a6ff 1754
e537352b
LP		 1755 .start = mount_start,
1756 .stop = mount_stop,
1757 .reload = mount_reload,
1758
8a0867d6
LP		 1759 .kill = mount_kill,
1760
a16e1123
LP		 1761 .serialize = mount_serialize,
1762 .deserialize_item = mount_deserialize_item,
1763
f50e0a01 1764 .active_state = mount_active_state,
10a94420 1765 .sub_state_to_string = mount_sub_state_to_string,
b08d03ff 1766
701cc384
LP		 1767 .check_gc = mount_check_gc,
1768
e537352b
LP		 1769 .sigchld_event = mount_sigchld_event,
1770 .timer_event = mount_timer_event,
1771
fdf20a31 1772 .reset_failed = mount_reset_failed,
5632e374 1773
c4e2ceae 1774 .bus_interface = "org.freedesktop.systemd1.Mount",
4139c1b2 1775 .bus_message_handler = bus_mount_message_handler,
c4e2ceae 1776 .bus_invalidating_properties = bus_mount_invalidating_properties,
4139c1b2 1777
f50e0a01
LP		 1778 .enumerate = mount_enumerate,
1779 .shutdown = mount_shutdown
5cb5a6ff 1780};
Unnamed repository; edit this file 'description' to name the repository.