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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ | |
2 | ||
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 | ||
22 | #include <errno.h> | |
23 | #include <stdio.h> | |
24 | #include <mntent.h> | |
25 | #include <sys/epoll.h> | |
26 | #include <signal.h> | |
27 | ||
28 | #include "unit.h" | |
29 | #include "mount.h" | |
30 | #include "load-fragment.h" | |
31 | #include "load-dropin.h" | |
32 | #include "log.h" | |
33 | #include "strv.h" | |
34 | #include "mount-setup.h" | |
35 | #include "unit-name.h" | |
36 | #include "dbus-mount.h" | |
37 | #include "special.h" | |
38 | #include "bus-errors.h" | |
39 | #include "exit-status.h" | |
40 | #include "def.h" | |
41 | ||
42 | static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = { | |
43 | [MOUNT_DEAD] = UNIT_INACTIVE, | |
44 | [MOUNT_MOUNTING] = UNIT_ACTIVATING, | |
45 | [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE, | |
46 | [MOUNT_MOUNTED] = UNIT_ACTIVE, | |
47 | [MOUNT_REMOUNTING] = UNIT_RELOADING, | |
48 | [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING, | |
49 | [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING, | |
50 | [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING, | |
51 | [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING, | |
52 | [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING, | |
53 | [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING, | |
54 | [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING, | |
55 | [MOUNT_FAILED] = UNIT_FAILED | |
56 | }; | |
57 | ||
58 | static void mount_init(Unit *u) { | |
59 | Mount *m = MOUNT(u); | |
60 | ||
61 | assert(u); | |
62 | assert(u->meta.load_state == UNIT_STUB); | |
63 | ||
64 | m->timeout_usec = DEFAULT_TIMEOUT_USEC; | |
65 | m->directory_mode = 0755; | |
66 | ||
67 | exec_context_init(&m->exec_context); | |
68 | m->exec_context.std_output = EXEC_OUTPUT_KMSG; | |
69 | ||
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. */ | |
74 | m->exec_context.same_pgrp = true; | |
75 | ||
76 | m->timer_watch.type = WATCH_INVALID; | |
77 | ||
78 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
79 | } | |
80 | ||
81 | static void mount_unwatch_control_pid(Mount *m) { | |
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 | ||
91 | static 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 | ||
101 | static void mount_done(Unit *u) { | |
102 | Mount *m = MOUNT(u); | |
103 | Meta *other; | |
104 | ||
105 | assert(m); | |
106 | ||
107 | free(m->where); | |
108 | m->where = NULL; | |
109 | ||
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 | ||
118 | mount_parameters_done(&m->parameters_etc_fstab); | |
119 | mount_parameters_done(&m->parameters_proc_self_mountinfo); | |
120 | mount_parameters_done(&m->parameters_fragment); | |
121 | ||
122 | exec_context_done(&m->exec_context); | |
123 | exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX); | |
124 | m->control_command = NULL; | |
125 | ||
126 | mount_unwatch_control_pid(m); | |
127 | ||
128 | unit_unwatch_timer(u, &m->timer_watch); | |
129 | } | |
130 | ||
131 | static int mount_add_mount_links(Mount *m) { | |
132 | Meta *other; | |
133 | int r; | |
134 | MountParameters *pm; | |
135 | ||
136 | assert(m); | |
137 | ||
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 | ||
145 | /* Adds in links to other mount points that might lie below or | |
146 | * above us in the hierarchy */ | |
147 | ||
148 | LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) { | |
149 | Mount *n = (Mount*) other; | |
150 | MountParameters *pn; | |
151 | ||
152 | if (n == m) | |
153 | continue; | |
154 | ||
155 | if (n->meta.load_state != UNIT_LOADED) | |
156 | continue; | |
157 | ||
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 | ||
165 | if (path_startswith(m->where, n->where)) { | |
166 | ||
167 | if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0) | |
168 | return r; | |
169 | ||
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; | |
173 | ||
174 | } else if (path_startswith(n->where, m->where)) { | |
175 | ||
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) | |
186 | return r; | |
187 | ||
188 | if (m->from_etc_fstab || m->from_fragment) | |
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) | |
198 | if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0) | |
199 | return r; | |
200 | } | |
201 | } | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
206 | static int mount_add_swap_links(Mount *m) { | |
207 | Meta *other; | |
208 | int r; | |
209 | ||
210 | assert(m); | |
211 | ||
212 | LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP]) | |
213 | if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0) | |
214 | return r; | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
219 | static 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 | ||
232 | static int mount_add_automount_links(Mount *m) { | |
233 | Meta *other; | |
234 | int r; | |
235 | ||
236 | assert(m); | |
237 | ||
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; | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | static int mount_add_socket_links(Mount *m) { | |
246 | Meta *other; | |
247 | int r; | |
248 | ||
249 | assert(m); | |
250 | ||
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; | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | static char* mount_test_option(const char *haystack, const char *needle) { | |
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 | ||
272 | return hasmntopt(&me, needle); | |
273 | } | |
274 | ||
275 | static int mount_add_target_links(Mount *m) { | |
276 | const char *target, *after = NULL; | |
277 | MountParameters *p; | |
278 | Unit *tu; | |
279 | int r; | |
280 | bool noauto, nofail, handle, automount; | |
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 | ||
291 | noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO); | |
292 | nofail = !!mount_test_option(p->options, "nofail"); | |
293 | handle = | |
294 | mount_test_option(p->options, "comment=systemd.mount") || | |
295 | mount_test_option(p->options, "x-systemd-mount") || | |
296 | m->meta.manager->mount_auto; | |
297 | automount = | |
298 | mount_test_option(p->options, "comment=systemd.automount") || | |
299 | mount_test_option(p->options, "x-systemd-automount"); | |
300 | ||
301 | if (mount_test_option(p->options, "_netdev") || | |
302 | (p->fstype && fstype_is_network(p->fstype))) { | |
303 | target = SPECIAL_REMOTE_FS_TARGET; | |
304 | ||
305 | if (m->meta.manager->running_as == MANAGER_SYSTEM) | |
306 | after = SPECIAL_NETWORK_TARGET; | |
307 | } else | |
308 | target = SPECIAL_LOCAL_FS_TARGET; | |
309 | ||
310 | if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0) | |
311 | return r; | |
312 | ||
313 | if (after) | |
314 | if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0) | |
315 | return r; | |
316 | ||
317 | if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) { | |
318 | Unit *am; | |
319 | ||
320 | if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0) | |
321 | return r; | |
322 | ||
323 | return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true); | |
324 | } else { | |
325 | ||
326 | /* Automatically add mount points that aren't natively | |
327 | * configured to local-fs.target */ | |
328 | if (!noauto && | |
329 | !nofail && | |
330 | handle && | |
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; | |
335 | ||
336 | return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true); | |
337 | } | |
338 | } | |
339 | ||
340 | static 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 | ||
352 | static int mount_add_device_links(Mount *m) { | |
353 | MountParameters *p; | |
354 | int r; | |
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 | ||
365 | if (!p->what) | |
366 | return 0; | |
367 | ||
368 | if (!mount_is_bind(p) && !path_equal(m->where, "/")) { | |
369 | bool nofail, noauto; | |
370 | ||
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 | ||
380 | if (p->passno > 0 && | |
381 | !mount_is_bind(p) && | |
382 | UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM && | |
383 | !path_equal(m->where, "/")) { | |
384 | char *name; | |
385 | Unit *fsck; | |
386 | /* Let's add in the fsck service */ | |
387 | ||
388 | /* aka SPECIAL_FSCK_SERVICE */ | |
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 | ||
402 | if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0) | |
403 | return r; | |
404 | } | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | static int mount_add_default_dependencies(Mount *m) { | |
410 | int r; | |
411 | ||
412 | assert(m); | |
413 | ||
414 | if (m->meta.manager->running_as == MANAGER_SYSTEM && | |
415 | !path_equal(m->where, "/")) { | |
416 | MountParameters *p; | |
417 | ||
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; | |
432 | ||
433 | if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0) | |
434 | return r; | |
435 | } | |
436 | ||
437 | return 0; | |
438 | } | |
439 | ||
440 | static int mount_verify(Mount *m) { | |
441 | bool b; | |
442 | char *e; | |
443 | assert(m); | |
444 | ||
445 | if (m->meta.load_state != UNIT_LOADED) | |
446 | return 0; | |
447 | ||
448 | if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo) | |
449 | return -ENOENT; | |
450 | ||
451 | if (!(e = unit_name_from_path(m->where, ".mount"))) | |
452 | return -ENOMEM; | |
453 | ||
454 | b = unit_has_name(UNIT(m), e); | |
455 | free(e); | |
456 | ||
457 | if (!b) { | |
458 | log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id); | |
459 | return -EINVAL; | |
460 | } | |
461 | ||
462 | if (m->meta.fragment_path && !m->parameters_fragment.what) { | |
463 | log_error("%s's What setting is missing. Refusing.", m->meta.id); | |
464 | return -EBADMSG; | |
465 | } | |
466 | ||
467 | if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) { | |
468 | log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id); | |
469 | return -EINVAL; | |
470 | } | |
471 | ||
472 | return 0; | |
473 | } | |
474 | ||
475 | static 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) { | |
487 | if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0) | |
488 | return r; | |
489 | ||
490 | if (m->meta.fragment_path) | |
491 | m->from_fragment = true; | |
492 | ||
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 | ||
499 | if (!m->meta.description) | |
500 | if ((r = unit_set_description(u, m->where)) < 0) | |
501 | return r; | |
502 | ||
503 | if ((r = mount_add_device_links(m)) < 0) | |
504 | return r; | |
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) | |
513 | return r; | |
514 | ||
515 | if ((r = mount_add_path_links(m)) < 0) | |
516 | return r; | |
517 | ||
518 | if ((r = mount_add_automount_links(m)) < 0) | |
519 | return r; | |
520 | ||
521 | if ((r = mount_add_target_links(m)) < 0) | |
522 | return r; | |
523 | ||
524 | if ((r = unit_add_default_cgroups(u)) < 0) | |
525 | return r; | |
526 | ||
527 | if (m->meta.default_dependencies) | |
528 | if ((r = mount_add_default_dependencies(m)) < 0) | |
529 | return r; | |
530 | } | |
531 | ||
532 | return mount_verify(m); | |
533 | } | |
534 | ||
535 | static 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 | ||
547 | static 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); | |
565 | mount_unwatch_control_pid(m); | |
566 | m->control_command = NULL; | |
567 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
568 | } | |
569 | ||
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 || | |
581 | state == MOUNT_FAILED) | |
582 | mount_notify_automount(m, -ENODEV); | |
583 | ||
584 | if (state != old_state) | |
585 | log_debug("%s changed %s -> %s", | |
586 | m->meta.id, | |
587 | mount_state_to_string(old_state), | |
588 | mount_state_to_string(state)); | |
589 | ||
590 | unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure); | |
591 | m->reload_failure = false; | |
592 | } | |
593 | ||
594 | static int mount_coldplug(Unit *u) { | |
595 | Mount *m = MOUNT(u); | |
596 | MountState new_state = MOUNT_DEAD; | |
597 | int r; | |
598 | ||
599 | assert(m); | |
600 | assert(m->state == MOUNT_DEAD); | |
601 | ||
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; | |
606 | ||
607 | if (new_state != m->state) { | |
608 | ||
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) { | |
619 | ||
620 | if (m->control_pid <= 0) | |
621 | return -EBADMSG; | |
622 | ||
623 | if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0) | |
624 | return r; | |
625 | ||
626 | if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0) | |
627 | return r; | |
628 | } | |
629 | ||
630 | mount_set_state(m, new_state); | |
631 | } | |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
636 | static 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" | |
659 | "%sDirectoryMode: %04o\n", | |
660 | prefix, mount_state_to_string(m->state), | |
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), | |
668 | prefix, m->directory_mode); | |
669 | ||
670 | if (m->control_pid > 0) | |
671 | fprintf(f, | |
672 | "%sControl PID: %lu\n", | |
673 | prefix, (unsigned long) m->control_pid); | |
674 | ||
675 | exec_context_dump(&m->exec_context, f, prefix); | |
676 | } | |
677 | ||
678 | static 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, | |
693 | m->meta.manager->environment, | |
694 | true, | |
695 | true, | |
696 | true, | |
697 | m->meta.manager->confirm_spawn, | |
698 | m->meta.cgroup_bondings, | |
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 | ||
710 | fail: | |
711 | unit_unwatch_timer(UNIT(m), &m->timer_watch); | |
712 | ||
713 | return r; | |
714 | } | |
715 | ||
716 | static void mount_enter_dead(Mount *m, bool success) { | |
717 | assert(m); | |
718 | ||
719 | if (!success) | |
720 | m->failure = true; | |
721 | ||
722 | mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD); | |
723 | } | |
724 | ||
725 | static 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 | ||
734 | static void mount_enter_signal(Mount *m, MountState state, bool success) { | |
735 | int r; | |
736 | Set *pid_set = NULL; | |
737 | bool wait_for_exit = false; | |
738 | ||
739 | assert(m); | |
740 | ||
741 | if (!success) | |
742 | m->failure = true; | |
743 | ||
744 | if (m->exec_context.kill_mode != KILL_NONE) { | |
745 | int sig = (state == MOUNT_MOUNTING_SIGTERM || | |
746 | state == MOUNT_UNMOUNTING_SIGTERM || | |
747 | state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL; | |
748 | ||
749 | if (m->control_pid > 0) { | |
750 | if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH) | |
751 | ||
752 | log_warning("Failed to kill control process %li: %m", (long) m->control_pid); | |
753 | else | |
754 | wait_for_exit = true; | |
755 | } | |
756 | ||
757 | if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) { | |
758 | ||
759 | if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) { | |
760 | r = -ENOMEM; | |
761 | goto fail; | |
762 | } | |
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 | ||
769 | if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) { | |
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 | } | |
777 | } | |
778 | ||
779 | if (wait_for_exit) { | |
780 | if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0) | |
781 | goto fail; | |
782 | ||
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 | |
787 | mount_enter_dead(m, true); | |
788 | ||
789 | return; | |
790 | ||
791 | fail: | |
792 | log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r)); | |
793 | ||
794 | if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL) | |
795 | mount_enter_mounted(m, false); | |
796 | else | |
797 | mount_enter_dead(m, false); | |
798 | ||
799 | if (pid_set) | |
800 | set_free(pid_set); | |
801 | } | |
802 | ||
803 | static void mount_enter_unmounting(Mount *m, bool success) { | |
804 | int r; | |
805 | ||
806 | assert(m); | |
807 | ||
808 | if (!success) | |
809 | m->failure = true; | |
810 | ||
811 | m->control_command_id = MOUNT_EXEC_UNMOUNT; | |
812 | m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT; | |
813 | ||
814 | if ((r = exec_command_set( | |
815 | m->control_command, | |
816 | "/bin/umount", | |
817 | m->where, | |
818 | NULL)) < 0) | |
819 | goto fail; | |
820 | ||
821 | mount_unwatch_control_pid(m); | |
822 | ||
823 | if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0) | |
824 | goto fail; | |
825 | ||
826 | mount_set_state(m, MOUNT_UNMOUNTING); | |
827 | ||
828 | return; | |
829 | ||
830 | fail: | |
831 | log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r)); | |
832 | mount_enter_mounted(m, false); | |
833 | } | |
834 | ||
835 | static void mount_enter_mounting(Mount *m) { | |
836 | int r; | |
837 | ||
838 | assert(m); | |
839 | ||
840 | m->control_command_id = MOUNT_EXEC_MOUNT; | |
841 | m->control_command = m->exec_command + MOUNT_EXEC_MOUNT; | |
842 | ||
843 | mkdir_p(m->where, m->directory_mode); | |
844 | ||
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 | ||
849 | if (m->from_fragment) | |
850 | r = exec_command_set( | |
851 | m->control_command, | |
852 | "/bin/mount", | |
853 | m->parameters_fragment.what, | |
854 | m->where, | |
855 | "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto", | |
856 | m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options, | |
857 | NULL); | |
858 | else if (m->from_etc_fstab) | |
859 | r = exec_command_set( | |
860 | m->control_command, | |
861 | "/bin/mount", | |
862 | m->where, | |
863 | NULL); | |
864 | else | |
865 | r = -ENOENT; | |
866 | ||
867 | if (r < 0) | |
868 | goto fail; | |
869 | ||
870 | mount_unwatch_control_pid(m); | |
871 | ||
872 | if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0) | |
873 | goto fail; | |
874 | ||
875 | mount_set_state(m, MOUNT_MOUNTING); | |
876 | ||
877 | return; | |
878 | ||
879 | fail: | |
880 | log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r)); | |
881 | mount_enter_dead(m, false); | |
882 | } | |
883 | ||
884 | static void mount_enter_mounting_done(Mount *m) { | |
885 | assert(m); | |
886 | ||
887 | mount_set_state(m, MOUNT_MOUNTING_DONE); | |
888 | } | |
889 | ||
890 | static void mount_enter_remounting(Mount *m, bool success) { | |
891 | int r; | |
892 | ||
893 | assert(m); | |
894 | ||
895 | if (!success) | |
896 | m->failure = true; | |
897 | ||
898 | m->control_command_id = MOUNT_EXEC_REMOUNT; | |
899 | m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT; | |
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( | |
916 | m->control_command, | |
917 | "/bin/mount", | |
918 | m->parameters_fragment.what, | |
919 | m->where, | |
920 | "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto", | |
921 | "-o", o, | |
922 | NULL); | |
923 | ||
924 | free(buf); | |
925 | } else if (m->from_etc_fstab) | |
926 | r = exec_command_set( | |
927 | m->control_command, | |
928 | "/bin/mount", | |
929 | m->where, | |
930 | "-o", "remount", | |
931 | NULL); | |
932 | else | |
933 | r = -ENOENT; | |
934 | ||
935 | if (r < 0) | |
936 | goto fail; | |
937 | ||
938 | mount_unwatch_control_pid(m); | |
939 | ||
940 | if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0) | |
941 | goto fail; | |
942 | ||
943 | mount_set_state(m, MOUNT_REMOUNTING); | |
944 | ||
945 | return; | |
946 | ||
947 | fail: | |
948 | log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r)); | |
949 | m->reload_failure = true; | |
950 | mount_enter_mounted(m, true); | |
951 | } | |
952 | ||
953 | static 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 || | |
962 | m->state == MOUNT_UNMOUNTING_SIGKILL || | |
963 | m->state == MOUNT_MOUNTING_SIGTERM || | |
964 | m->state == MOUNT_MOUNTING_SIGKILL) | |
965 | return -EAGAIN; | |
966 | ||
967 | /* Already on it! */ | |
968 | if (m->state == MOUNT_MOUNTING) | |
969 | return 0; | |
970 | ||
971 | assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED); | |
972 | ||
973 | m->failure = false; | |
974 | mount_enter_mounting(m); | |
975 | return 0; | |
976 | } | |
977 | ||
978 | static int mount_stop(Unit *u) { | |
979 | Mount *m = MOUNT(u); | |
980 | ||
981 | assert(m); | |
982 | ||
983 | /* Already on it */ | |
984 | if (m->state == MOUNT_UNMOUNTING || | |
985 | m->state == MOUNT_UNMOUNTING_SIGKILL || | |
986 | m->state == MOUNT_UNMOUNTING_SIGTERM || | |
987 | m->state == MOUNT_MOUNTING_SIGTERM || | |
988 | m->state == MOUNT_MOUNTING_SIGKILL) | |
989 | return 0; | |
990 | ||
991 | assert(m->state == MOUNT_MOUNTING || | |
992 | m->state == MOUNT_MOUNTING_DONE || | |
993 | m->state == MOUNT_MOUNTED || | |
994 | m->state == MOUNT_REMOUNTING || | |
995 | m->state == MOUNT_REMOUNTING_SIGTERM || | |
996 | m->state == MOUNT_REMOUNTING_SIGKILL); | |
997 | ||
998 | mount_enter_unmounting(m, true); | |
999 | return 0; | |
1000 | } | |
1001 | ||
1002 | static 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 | ||
1016 | static 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) | |
1027 | unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid); | |
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 | ||
1035 | static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
1036 | Mount *m = MOUNT(u); | |
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")) { | |
1059 | pid_t pid; | |
1060 | ||
1061 | if (parse_pid(value, &pid) < 0) | |
1062 | log_debug("Failed to parse control-pid value %s", value); | |
1063 | else | |
1064 | m->control_pid = pid; | |
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 | ||
1081 | static UnitActiveState mount_active_state(Unit *u) { | |
1082 | assert(u); | |
1083 | ||
1084 | return state_translation_table[MOUNT(u)->state]; | |
1085 | } | |
1086 | ||
1087 | static const char *mount_sub_state_to_string(Unit *u) { | |
1088 | assert(u); | |
1089 | ||
1090 | return mount_state_to_string(MOUNT(u)->state); | |
1091 | } | |
1092 | ||
1093 | static 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 | ||
1101 | static 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 | ||
1108 | if (pid != m->control_pid) | |
1109 | return; | |
1110 | ||
1111 | m->control_pid = 0; | |
1112 | ||
1113 | success = is_clean_exit(code, status); | |
1114 | m->failure = m->failure || !success; | |
1115 | ||
1116 | if (m->control_command) { | |
1117 | exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id); | |
1118 | m->control_command = NULL; | |
1119 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
1120 | } | |
1121 | ||
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); | |
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: | |
1138 | ||
1139 | if (success) | |
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 | ||
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 | ||
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 | } | |
1174 | ||
1175 | /* Notify clients about changed exit status */ | |
1176 | unit_add_to_dbus_queue(u); | |
1177 | } | |
1178 | ||
1179 | static 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: | |
1190 | log_warning("%s mounting timed out. Stopping.", u->meta.id); | |
1191 | mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false); | |
1192 | break; | |
1193 | ||
1194 | case MOUNT_REMOUNTING: | |
1195 | log_warning("%s remounting timed out. Stopping.", u->meta.id); | |
1196 | m->reload_failure = true; | |
1197 | mount_enter_mounted(m, true); | |
1198 | break; | |
1199 | ||
1200 | case MOUNT_UNMOUNTING: | |
1201 | log_warning("%s unmounting timed out. Stopping.", u->meta.id); | |
1202 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false); | |
1203 | break; | |
1204 | ||
1205 | case MOUNT_MOUNTING_SIGTERM: | |
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 | } | |
1217 | break; | |
1218 | ||
1219 | case MOUNT_REMOUNTING_SIGTERM: | |
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 | } | |
1231 | break; | |
1232 | ||
1233 | case MOUNT_UNMOUNTING_SIGTERM: | |
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 | } | |
1245 | break; | |
1246 | ||
1247 | case MOUNT_MOUNTING_SIGKILL: | |
1248 | case MOUNT_REMOUNTING_SIGKILL: | |
1249 | case MOUNT_UNMOUNTING_SIGKILL: | |
1250 | log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id); | |
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 | ||
1263 | static int mount_add_one( | |
1264 | Manager *m, | |
1265 | const char *what, | |
1266 | const char *where, | |
1267 | const char *options, | |
1268 | const char *fstype, | |
1269 | int passno, | |
1270 | bool from_proc_self_mountinfo, | |
1271 | bool set_flags) { | |
1272 | int r; | |
1273 | Unit *u; | |
1274 | bool delete; | |
1275 | char *e, *w = NULL, *o = NULL, *f = NULL; | |
1276 | MountParameters *p; | |
1277 | ||
1278 | assert(m); | |
1279 | assert(what); | |
1280 | assert(where); | |
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; | |
1290 | if (mount_point_ignore(where)) | |
1291 | return 0; | |
1292 | ||
1293 | if (streq(fstype, "autofs")) | |
1294 | return 0; | |
1295 | ||
1296 | /* probably some kind of swap, ignore */ | |
1297 | if (!is_path(where)) | |
1298 | return 0; | |
1299 | ||
1300 | if (!(e = unit_name_from_path(where, ".mount"))) | |
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 | ||
1317 | if (!(MOUNT(u)->where = strdup(where))) { | |
1318 | r = -ENOMEM; | |
1319 | goto fail; | |
1320 | } | |
1321 | ||
1322 | unit_add_to_load_queue(u); | |
1323 | } else { | |
1324 | delete = false; | |
1325 | free(e); | |
1326 | } | |
1327 | ||
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) { | |
1336 | p = &MOUNT(u)->parameters_proc_self_mountinfo; | |
1337 | ||
1338 | if (set_flags) { | |
1339 | MOUNT(u)->is_mounted = true; | |
1340 | MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo; | |
1341 | MOUNT(u)->just_changed = !streq_ptr(p->options, o); | |
1342 | } | |
1343 | ||
1344 | MOUNT(u)->from_proc_self_mountinfo = true; | |
1345 | } else { | |
1346 | p = &MOUNT(u)->parameters_etc_fstab; | |
1347 | MOUNT(u)->from_etc_fstab = true; | |
1348 | } | |
1349 | ||
1350 | free(p->what); | |
1351 | p->what = w; | |
1352 | ||
1353 | free(p->options); | |
1354 | p->options = o; | |
1355 | ||
1356 | free(p->fstype); | |
1357 | p->fstype = f; | |
1358 | ||
1359 | p->passno = passno; | |
1360 | ||
1361 | unit_add_to_dbus_queue(u); | |
1362 | ||
1363 | return 0; | |
1364 | ||
1365 | fail: | |
1366 | free(w); | |
1367 | free(o); | |
1368 | free(f); | |
1369 | ||
1370 | if (delete && u) | |
1371 | unit_free(u); | |
1372 | ||
1373 | return r; | |
1374 | } | |
1375 | ||
1376 | static 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 | ||
1397 | static int mount_load_etc_fstab(Manager *m) { | |
1398 | FILE *f; | |
1399 | int r = 0; | |
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; | |
1410 | int k; | |
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 | ||
1429 | if (streq(me->mnt_type, "swap")) { | |
1430 | int pri; | |
1431 | ||
1432 | if ((pri = mount_find_pri(me->mnt_opts)) < 0) | |
1433 | k = pri; | |
1434 | else | |
1435 | k = swap_add_one(m, | |
1436 | what, | |
1437 | NULL, | |
1438 | pri, | |
1439 | !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO), | |
1440 | !!mount_test_option(me->mnt_opts, "nofail"), | |
1441 | !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"), | |
1442 | false); | |
1443 | } else | |
1444 | k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false); | |
1445 | ||
1446 | free(what); | |
1447 | free(where); | |
1448 | ||
1449 | if (r < 0) | |
1450 | r = k; | |
1451 | } | |
1452 | ||
1453 | finish: | |
1454 | ||
1455 | endmntent(f); | |
1456 | return r; | |
1457 | } | |
1458 | ||
1459 | static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { | |
1460 | int r = 0; | |
1461 | unsigned i; | |
1462 | char *device, *path, *options, *options2, *fstype, *d, *p, *o; | |
1463 | ||
1464 | assert(m); | |
1465 | ||
1466 | rewind(m->proc_self_mountinfo); | |
1467 | ||
1468 | for (i = 1;; i++) { | |
1469 | int k; | |
1470 | ||
1471 | device = path = options = options2 = fstype = d = p = o = NULL; | |
1472 | ||
1473 | if ((k = fscanf(m->proc_self_mountinfo, | |
1474 | "%*s " /* (1) mount id */ | |
1475 | "%*s " /* (2) parent id */ | |
1476 | "%*s " /* (3) major:minor */ | |
1477 | "%*s " /* (4) root */ | |
1478 | "%ms " /* (5) mount point */ | |
1479 | "%ms" /* (6) mount options */ | |
1480 | "%*[^-]" /* (7) optional fields */ | |
1481 | "- " /* (8) separator */ | |
1482 | "%ms " /* (9) file system type */ | |
1483 | "%ms" /* (10) mount source */ | |
1484 | "%ms" /* (11) mount options 2 */ | |
1485 | "%*[^\n]", /* some rubbish at the end */ | |
1486 | &path, | |
1487 | &options, | |
1488 | &fstype, | |
1489 | &device, | |
1490 | &options2)) != 5) { | |
1491 | ||
1492 | if (k == EOF) | |
1493 | break; | |
1494 | ||
1495 | log_warning("Failed to parse /proc/self/mountinfo:%u.", i); | |
1496 | goto clean_up; | |
1497 | } | |
1498 | ||
1499 | if (asprintf(&o, "%s,%s", options, options2) < 0) { | |
1500 | r = -ENOMEM; | |
1501 | goto finish; | |
1502 | } | |
1503 | ||
1504 | if (!(d = cunescape(device)) || | |
1505 | !(p = cunescape(path))) { | |
1506 | r = -ENOMEM; | |
1507 | goto finish; | |
1508 | } | |
1509 | ||
1510 | if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0) | |
1511 | r = k; | |
1512 | ||
1513 | clean_up: | |
1514 | free(device); | |
1515 | free(path); | |
1516 | free(options); | |
1517 | free(options2); | |
1518 | free(fstype); | |
1519 | free(d); | |
1520 | free(p); | |
1521 | free(o); | |
1522 | } | |
1523 | ||
1524 | finish: | |
1525 | free(device); | |
1526 | free(path); | |
1527 | free(options); | |
1528 | free(options2); | |
1529 | free(fstype); | |
1530 | free(d); | |
1531 | free(p); | |
1532 | free(o); | |
1533 | ||
1534 | return r; | |
1535 | } | |
1536 | ||
1537 | static void mount_shutdown(Manager *m) { | |
1538 | assert(m); | |
1539 | ||
1540 | if (m->proc_self_mountinfo) { | |
1541 | fclose(m->proc_self_mountinfo); | |
1542 | m->proc_self_mountinfo = NULL; | |
1543 | } | |
1544 | } | |
1545 | ||
1546 | static int mount_enumerate(Manager *m) { | |
1547 | int r; | |
1548 | struct epoll_event ev; | |
1549 | assert(m); | |
1550 | ||
1551 | if (!m->proc_self_mountinfo) { | |
1552 | if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re"))) | |
1553 | return -errno; | |
1554 | ||
1555 | m->mount_watch.type = WATCH_MOUNT; | |
1556 | m->mount_watch.fd = fileno(m->proc_self_mountinfo); | |
1557 | ||
1558 | zero(ev); | |
1559 | ev.events = EPOLLPRI; | |
1560 | ev.data.ptr = &m->mount_watch; | |
1561 | ||
1562 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0) | |
1563 | return -errno; | |
1564 | } | |
1565 | ||
1566 | if ((r = mount_load_etc_fstab(m)) < 0) | |
1567 | goto fail; | |
1568 | ||
1569 | if ((r = mount_load_proc_self_mountinfo(m, false)) < 0) | |
1570 | goto fail; | |
1571 | ||
1572 | return 0; | |
1573 | ||
1574 | fail: | |
1575 | mount_shutdown(m); | |
1576 | return r; | |
1577 | } | |
1578 | ||
1579 | void mount_fd_event(Manager *m, int events) { | |
1580 | Meta *meta; | |
1581 | int r; | |
1582 | ||
1583 | assert(m); | |
1584 | assert(events & EPOLLPRI); | |
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) { | |
1591 | log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r)); | |
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 | ||
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 | ||
1608 | if (!mount->is_mounted) { | |
1609 | /* This has just been unmounted. */ | |
1610 | ||
1611 | mount->from_proc_self_mountinfo = false; | |
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 | ||
1627 | /* New or changed mount entry */ | |
1628 | ||
1629 | switch (mount->state) { | |
1630 | ||
1631 | case MOUNT_DEAD: | |
1632 | case MOUNT_FAILED: | |
1633 | mount_enter_mounted(mount, true); | |
1634 | break; | |
1635 | ||
1636 | case MOUNT_MOUNTING: | |
1637 | mount_enter_mounting_done(mount); | |
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 | ||
1656 | static void mount_reset_failed(Unit *u) { | |
1657 | Mount *m = MOUNT(u); | |
1658 | ||
1659 | assert(m); | |
1660 | ||
1661 | if (m->state == MOUNT_FAILED) | |
1662 | mount_set_state(m, MOUNT_DEAD); | |
1663 | ||
1664 | m->failure = false; | |
1665 | } | |
1666 | ||
1667 | static 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) | |
1685 | if (kill(m->control_pid, signo) < 0) | |
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 | ||
1701 | if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0) | |
1702 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
1703 | r = q; | |
1704 | } | |
1705 | ||
1706 | finish: | |
1707 | if (pid_set) | |
1708 | set_free(pid_set); | |
1709 | ||
1710 | return r; | |
1711 | } | |
1712 | ||
1713 | static 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", | |
1726 | [MOUNT_FAILED] = "failed" | |
1727 | }; | |
1728 | ||
1729 | DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState); | |
1730 | ||
1731 | static 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 | ||
1737 | DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand); | |
1738 | ||
1739 | const UnitVTable mount_vtable = { | |
1740 | .suffix = ".mount", | |
1741 | ||
1742 | .no_alias = true, | |
1743 | .no_instances = true, | |
1744 | .no_isolate = true, | |
1745 | .show_status = true, | |
1746 | ||
1747 | .init = mount_init, | |
1748 | .load = mount_load, | |
1749 | .done = mount_done, | |
1750 | ||
1751 | .coldplug = mount_coldplug, | |
1752 | ||
1753 | .dump = mount_dump, | |
1754 | ||
1755 | .start = mount_start, | |
1756 | .stop = mount_stop, | |
1757 | .reload = mount_reload, | |
1758 | ||
1759 | .kill = mount_kill, | |
1760 | ||
1761 | .serialize = mount_serialize, | |
1762 | .deserialize_item = mount_deserialize_item, | |
1763 | ||
1764 | .active_state = mount_active_state, | |
1765 | .sub_state_to_string = mount_sub_state_to_string, | |
1766 | ||
1767 | .check_gc = mount_check_gc, | |
1768 | ||
1769 | .sigchld_event = mount_sigchld_event, | |
1770 | .timer_event = mount_timer_event, | |
1771 | ||
1772 | .reset_failed = mount_reset_failed, | |
1773 | ||
1774 | .bus_interface = "org.freedesktop.systemd1.Mount", | |
1775 | .bus_message_handler = bus_mount_message_handler, | |
1776 | .bus_invalidating_properties = bus_mount_invalidating_properties, | |
1777 | ||
1778 | .enumerate = mount_enumerate, | |
1779 | .shutdown = mount_shutdown | |
1780 | }; |