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Commit | Line | Data |
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5cb5a6ff LP |
1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ |
2 | ||
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
5cb5a6ff | 22 | #include <errno.h> |
b08d03ff LP |
23 | #include <stdio.h> |
24 | #include <mntent.h> | |
ef734fd6 | 25 | #include <sys/epoll.h> |
e537352b | 26 | #include <signal.h> |
5cb5a6ff | 27 | |
87f0e418 | 28 | #include "unit.h" |
5cb5a6ff LP |
29 | #include "mount.h" |
30 | #include "load-fragment.h" | |
5cb5a6ff | 31 | #include "load-dropin.h" |
b08d03ff | 32 | #include "log.h" |
e537352b LP |
33 | #include "strv.h" |
34 | #include "mount-setup.h" | |
9e2f7c11 | 35 | #include "unit-name.h" |
4139c1b2 LP |
36 | #include "mount.h" |
37 | #include "dbus-mount.h" | |
514f4ef5 | 38 | #include "special.h" |
5cb5a6ff | 39 | |
f50e0a01 LP |
40 | static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = { |
41 | [MOUNT_DEAD] = UNIT_INACTIVE, | |
42 | [MOUNT_MOUNTING] = UNIT_ACTIVATING, | |
e537352b | 43 | [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE, |
f50e0a01 | 44 | [MOUNT_MOUNTED] = UNIT_ACTIVE, |
e537352b | 45 | [MOUNT_REMOUNTING] = UNIT_ACTIVE_RELOADING, |
f50e0a01 | 46 | [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING, |
e537352b LP |
47 | [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING, |
48 | [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING, | |
49 | [MOUNT_REMOUNTING_SIGTERM] = UNIT_ACTIVE_RELOADING, | |
50 | [MOUNT_REMOUNTING_SIGKILL] = UNIT_ACTIVE_RELOADING, | |
51 | [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING, | |
52 | [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING, | |
18c78fb1 | 53 | [MOUNT_MAINTENANCE] = UNIT_INACTIVE, |
f50e0a01 | 54 | }; |
5cb5a6ff | 55 | |
a16e1123 LP |
56 | static void mount_init(Unit *u) { |
57 | Mount *m = MOUNT(u); | |
5cb5a6ff | 58 | |
a16e1123 LP |
59 | assert(u); |
60 | assert(u->meta.load_state == UNIT_STUB); | |
61 | ||
62 | m->timeout_usec = DEFAULT_TIMEOUT_USEC; | |
63 | exec_context_init(&m->exec_context); | |
8d567588 | 64 | |
a16e1123 LP |
65 | /* We need to make sure that /bin/mount is always called in |
66 | * the same process group as us, so that the autofs kernel | |
67 | * side doesn't send us another mount request while we are | |
68 | * already trying to comply its last one. */ | |
69 | m->exec_context.no_setsid = true; | |
8d567588 | 70 | |
a16e1123 LP |
71 | m->timer_watch.type = WATCH_INVALID; |
72 | ||
73 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
8d567588 LP |
74 | } |
75 | ||
a16e1123 | 76 | static void mount_unwatch_control_pid(Mount *m) { |
5e94833f LP |
77 | assert(m); |
78 | ||
79 | if (m->control_pid <= 0) | |
80 | return; | |
81 | ||
82 | unit_unwatch_pid(UNIT(m), m->control_pid); | |
83 | m->control_pid = 0; | |
84 | } | |
85 | ||
e537352b LP |
86 | static void mount_parameters_done(MountParameters *p) { |
87 | assert(p); | |
88 | ||
89 | free(p->what); | |
90 | free(p->options); | |
91 | free(p->fstype); | |
92 | ||
93 | p->what = p->options = p->fstype = NULL; | |
94 | } | |
95 | ||
87f0e418 | 96 | static void mount_done(Unit *u) { |
ef734fd6 | 97 | Mount *m = MOUNT(u); |
034c6ed7 | 98 | |
ef734fd6 | 99 | assert(m); |
034c6ed7 | 100 | |
e537352b LP |
101 | free(m->where); |
102 | m->where = NULL; | |
f50e0a01 | 103 | |
e537352b LP |
104 | mount_parameters_done(&m->parameters_etc_fstab); |
105 | mount_parameters_done(&m->parameters_proc_self_mountinfo); | |
106 | mount_parameters_done(&m->parameters_fragment); | |
ef734fd6 | 107 | |
e537352b LP |
108 | exec_context_done(&m->exec_context); |
109 | exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX); | |
110 | m->control_command = NULL; | |
f50e0a01 | 111 | |
a16e1123 | 112 | mount_unwatch_control_pid(m); |
f50e0a01 | 113 | |
e537352b | 114 | unit_unwatch_timer(u, &m->timer_watch); |
f50e0a01 LP |
115 | } |
116 | ||
6e2ef85b LP |
117 | static int mount_add_mount_links(Mount *m) { |
118 | Meta *other; | |
b08d03ff LP |
119 | int r; |
120 | ||
6e2ef85b | 121 | assert(m); |
b08d03ff | 122 | |
6e2ef85b LP |
123 | /* Adds in links to other mount points that might lie below or |
124 | * above us in the hierarchy */ | |
e537352b | 125 | |
6e2ef85b LP |
126 | LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) { |
127 | Mount *n = (Mount*) other; | |
07b0b134 | 128 | |
6e2ef85b LP |
129 | if (n == m) |
130 | continue; | |
b08d03ff | 131 | |
6e2ef85b LP |
132 | if (n->meta.load_state != UNIT_LOADED) |
133 | continue; | |
b08d03ff | 134 | |
6e2ef85b | 135 | if (path_startswith(m->where, n->where)) { |
b08d03ff | 136 | |
6e2ef85b LP |
137 | if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0) |
138 | return r; | |
b08d03ff | 139 | |
6e2ef85b LP |
140 | if (n->from_etc_fstab || n->from_fragment) |
141 | if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0) | |
142 | return r; | |
b08d03ff | 143 | |
6e2ef85b | 144 | } else if (path_startswith(n->where, m->where)) { |
b08d03ff | 145 | |
6e2ef85b LP |
146 | if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(n), true)) < 0) |
147 | return r; | |
148 | ||
149 | if (m->from_etc_fstab || m->from_fragment) | |
150 | if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0) | |
151 | return r; | |
152 | } | |
153 | } | |
b08d03ff LP |
154 | |
155 | return 0; | |
156 | } | |
157 | ||
6e2ef85b | 158 | static int mount_add_swap_links(Mount *m) { |
ef734fd6 | 159 | Meta *other; |
b08d03ff LP |
160 | int r; |
161 | ||
6e2ef85b | 162 | assert(m); |
b08d03ff | 163 | |
6e2ef85b LP |
164 | LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP]) |
165 | if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0) | |
166 | return r; | |
b08d03ff | 167 | |
6e2ef85b LP |
168 | return 0; |
169 | } | |
b08d03ff | 170 | |
01f78473 LP |
171 | static int mount_add_path_links(Mount *m) { |
172 | Meta *other; | |
173 | int r; | |
174 | ||
175 | assert(m); | |
176 | ||
177 | LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH]) | |
178 | if ((r = path_add_one_mount_link((Path*) other, m)) < 0) | |
179 | return r; | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
6e2ef85b LP |
184 | static int mount_add_automount_links(Mount *m) { |
185 | Meta *other; | |
186 | int r; | |
e537352b | 187 | |
6e2ef85b | 188 | assert(m); |
b08d03ff | 189 | |
6e2ef85b LP |
190 | LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT]) |
191 | if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0) | |
192 | return r; | |
b08d03ff | 193 | |
6e2ef85b LP |
194 | return 0; |
195 | } | |
b08d03ff | 196 | |
6e2ef85b LP |
197 | static int mount_add_socket_links(Mount *m) { |
198 | Meta *other; | |
199 | int r; | |
b08d03ff | 200 | |
6e2ef85b | 201 | assert(m); |
b08d03ff | 202 | |
6e2ef85b LP |
203 | LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET]) |
204 | if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0) | |
205 | return r; | |
b08d03ff LP |
206 | |
207 | return 0; | |
208 | } | |
209 | ||
07b0b134 | 210 | static char* mount_test_option(const char *haystack, const char *needle) { |
e537352b LP |
211 | struct mntent me; |
212 | ||
213 | assert(needle); | |
214 | ||
215 | /* Like glibc's hasmntopt(), but works on a string, not a | |
216 | * struct mntent */ | |
217 | ||
218 | if (!haystack) | |
219 | return false; | |
220 | ||
221 | zero(me); | |
222 | me.mnt_opts = (char*) haystack; | |
223 | ||
07b0b134 | 224 | return hasmntopt(&me, needle); |
e537352b LP |
225 | } |
226 | ||
227 | static int mount_add_target_links(Mount *m) { | |
228 | const char *target; | |
229 | MountParameters *p; | |
a16e1123 | 230 | Unit *tu; |
e537352b | 231 | int r; |
307e85ef | 232 | bool noauto, handle, automount, user; |
e537352b LP |
233 | |
234 | assert(m); | |
235 | ||
236 | if (m->from_fragment) | |
237 | p = &m->parameters_fragment; | |
238 | else if (m->from_etc_fstab) | |
239 | p = &m->parameters_etc_fstab; | |
240 | else | |
241 | return 0; | |
242 | ||
07b0b134 | 243 | noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO); |
307e85ef | 244 | user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users"); |
07b0b134 ML |
245 | handle = !!mount_test_option(p->options, "comment=systemd.mount"); |
246 | automount = !!mount_test_option(p->options, "comment=systemd.automount"); | |
e537352b | 247 | |
e537352b LP |
248 | if (mount_test_option(p->options, "_netdev") || |
249 | fstype_is_network(p->fstype)) | |
250 | target = SPECIAL_REMOTE_FS_TARGET; | |
251 | else | |
252 | target = SPECIAL_LOCAL_FS_TARGET; | |
253 | ||
a16e1123 | 254 | if ((r = manager_load_unit(UNIT(m)->meta.manager, target, NULL, &tu)) < 0) |
e537352b LP |
255 | return r; |
256 | ||
a3d4e06d | 257 | if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) { |
a16e1123 LP |
258 | Unit *am; |
259 | ||
260 | if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0) | |
9fcc065a | 261 | return r; |
e537352b | 262 | |
701cc384 | 263 | if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(am), true)) < 0) |
a16e1123 LP |
264 | return r; |
265 | ||
701cc384 | 266 | return unit_add_dependency(UNIT(am), UNIT_BEFORE, tu, true); |
a16e1123 LP |
267 | |
268 | } else { | |
269 | ||
4e85aff4 | 270 | if (!noauto && handle) |
a3d4e06d | 271 | if (user || m->meta.manager->running_as == MANAGER_SYSTEM) |
307e85ef LP |
272 | if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0) |
273 | return r; | |
a16e1123 | 274 | |
701cc384 | 275 | return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true); |
a16e1123 | 276 | } |
e537352b LP |
277 | } |
278 | ||
8d567588 LP |
279 | static int mount_verify(Mount *m) { |
280 | bool b; | |
281 | char *e; | |
282 | assert(m); | |
283 | ||
8cbef760 | 284 | if (m->meta.load_state != UNIT_LOADED) |
8d567588 LP |
285 | return 0; |
286 | ||
8cbef760 LP |
287 | if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo) |
288 | return -ENOENT; | |
289 | ||
a16e1123 | 290 | if (!(e = unit_name_from_path(m->where, ".mount"))) |
8d567588 LP |
291 | return -ENOMEM; |
292 | ||
293 | b = unit_has_name(UNIT(m), e); | |
294 | free(e); | |
295 | ||
296 | if (!b) { | |
297 | log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->meta.id); | |
298 | return -EINVAL; | |
299 | } | |
300 | ||
4e85aff4 LP |
301 | if (m->meta.fragment_path && !m->parameters_fragment.what) { |
302 | log_error("%s's What setting is missing. Refusing.", UNIT(m)->meta.id); | |
303 | return -EBADMSG; | |
304 | } | |
305 | ||
8d567588 LP |
306 | return 0; |
307 | } | |
308 | ||
e537352b LP |
309 | static int mount_load(Unit *u) { |
310 | Mount *m = MOUNT(u); | |
311 | int r; | |
312 | ||
313 | assert(u); | |
314 | assert(u->meta.load_state == UNIT_STUB); | |
315 | ||
316 | if ((r = unit_load_fragment_and_dropin_optional(u)) < 0) | |
317 | return r; | |
318 | ||
319 | /* This is a new unit? Then let's add in some extras */ | |
320 | if (u->meta.load_state == UNIT_LOADED) { | |
4e85aff4 | 321 | const char *what = NULL; |
6e2ef85b | 322 | |
4e85aff4 LP |
323 | if (m->meta.fragment_path) |
324 | m->from_fragment = true; | |
e537352b | 325 | |
a16e1123 LP |
326 | if (!m->where) |
327 | if (!(m->where = unit_name_to_path(u->meta.id))) | |
328 | return -ENOMEM; | |
329 | ||
330 | path_kill_slashes(m->where); | |
331 | ||
4e85aff4 LP |
332 | if (!m->meta.description) |
333 | if ((r = unit_set_description(u, m->where)) < 0) | |
334 | return r; | |
e537352b | 335 | |
4e85aff4 LP |
336 | if (m->from_fragment && m->parameters_fragment.what) |
337 | what = m->parameters_fragment.what; | |
338 | else if (m->from_etc_fstab && m->parameters_etc_fstab.what) | |
339 | what = m->parameters_etc_fstab.what; | |
340 | else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what) | |
341 | what = m->parameters_proc_self_mountinfo.what; | |
e537352b | 342 | |
4e85aff4 | 343 | if (what) |
a3d4e06d | 344 | if ((r = unit_add_node_link(u, what, u->meta.manager->running_as == MANAGER_SYSTEM)) < 0) |
4e85aff4 | 345 | return r; |
6e2ef85b LP |
346 | |
347 | if ((r = mount_add_mount_links(m)) < 0) | |
348 | return r; | |
349 | ||
350 | if ((r = mount_add_socket_links(m)) < 0) | |
351 | return r; | |
352 | ||
353 | if ((r = mount_add_swap_links(m)) < 0) | |
e537352b LP |
354 | return r; |
355 | ||
01f78473 LP |
356 | if ((r = mount_add_path_links(m)) < 0) |
357 | return r; | |
358 | ||
6e2ef85b | 359 | if ((r = mount_add_automount_links(m)) < 0) |
e537352b LP |
360 | return r; |
361 | ||
6e2ef85b | 362 | if ((r = mount_add_target_links(m)) < 0) |
e537352b LP |
363 | return r; |
364 | ||
365 | if ((r = unit_add_default_cgroup(u)) < 0) | |
366 | return r; | |
367 | } | |
368 | ||
8d567588 | 369 | return mount_verify(m); |
e537352b LP |
370 | } |
371 | ||
a16e1123 LP |
372 | static int mount_notify_automount(Mount *m, int status) { |
373 | Unit *p; | |
374 | int r; | |
375 | ||
376 | assert(m); | |
377 | ||
378 | if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0) | |
379 | return r == -ENOENT ? 0 : r; | |
380 | ||
381 | return automount_send_ready(AUTOMOUNT(p), status); | |
382 | } | |
383 | ||
e537352b LP |
384 | static void mount_set_state(Mount *m, MountState state) { |
385 | MountState old_state; | |
386 | assert(m); | |
387 | ||
388 | old_state = m->state; | |
389 | m->state = state; | |
390 | ||
391 | if (state != MOUNT_MOUNTING && | |
392 | state != MOUNT_MOUNTING_DONE && | |
393 | state != MOUNT_REMOUNTING && | |
394 | state != MOUNT_UNMOUNTING && | |
395 | state != MOUNT_MOUNTING_SIGTERM && | |
396 | state != MOUNT_MOUNTING_SIGKILL && | |
397 | state != MOUNT_UNMOUNTING_SIGTERM && | |
398 | state != MOUNT_UNMOUNTING_SIGKILL && | |
399 | state != MOUNT_REMOUNTING_SIGTERM && | |
400 | state != MOUNT_REMOUNTING_SIGKILL) { | |
401 | unit_unwatch_timer(UNIT(m), &m->timer_watch); | |
a16e1123 | 402 | mount_unwatch_control_pid(m); |
e537352b | 403 | m->control_command = NULL; |
a16e1123 | 404 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; |
e537352b LP |
405 | } |
406 | ||
8d567588 LP |
407 | if (state == MOUNT_MOUNTED || |
408 | state == MOUNT_REMOUNTING) | |
409 | mount_notify_automount(m, 0); | |
410 | else if (state == MOUNT_DEAD || | |
411 | state == MOUNT_UNMOUNTING || | |
412 | state == MOUNT_MOUNTING_SIGTERM || | |
413 | state == MOUNT_MOUNTING_SIGKILL || | |
414 | state == MOUNT_REMOUNTING_SIGTERM || | |
415 | state == MOUNT_REMOUNTING_SIGKILL || | |
416 | state == MOUNT_UNMOUNTING_SIGTERM || | |
417 | state == MOUNT_UNMOUNTING_SIGKILL || | |
18c78fb1 | 418 | state == MOUNT_MAINTENANCE) |
8d567588 LP |
419 | mount_notify_automount(m, -ENODEV); |
420 | ||
e537352b | 421 | if (state != old_state) |
40d50879 | 422 | log_debug("%s changed %s -> %s", |
a16e1123 LP |
423 | UNIT(m)->meta.id, |
424 | mount_state_to_string(old_state), | |
425 | mount_state_to_string(state)); | |
e537352b LP |
426 | |
427 | unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]); | |
428 | } | |
429 | ||
430 | static int mount_coldplug(Unit *u) { | |
431 | Mount *m = MOUNT(u); | |
a16e1123 LP |
432 | MountState new_state = MOUNT_DEAD; |
433 | int r; | |
e537352b LP |
434 | |
435 | assert(m); | |
436 | assert(m->state == MOUNT_DEAD); | |
437 | ||
a16e1123 LP |
438 | if (m->deserialized_state != m->state) |
439 | new_state = m->deserialized_state; | |
440 | else if (m->from_proc_self_mountinfo) | |
441 | new_state = MOUNT_MOUNTED; | |
e537352b | 442 | |
a16e1123 | 443 | if (new_state != m->state) { |
e537352b | 444 | |
a16e1123 LP |
445 | if (new_state == MOUNT_MOUNTING || |
446 | new_state == MOUNT_MOUNTING_DONE || | |
447 | new_state == MOUNT_REMOUNTING || | |
448 | new_state == MOUNT_UNMOUNTING || | |
449 | new_state == MOUNT_MOUNTING_SIGTERM || | |
450 | new_state == MOUNT_MOUNTING_SIGKILL || | |
451 | new_state == MOUNT_UNMOUNTING_SIGTERM || | |
452 | new_state == MOUNT_UNMOUNTING_SIGKILL || | |
453 | new_state == MOUNT_REMOUNTING_SIGTERM || | |
454 | new_state == MOUNT_REMOUNTING_SIGKILL) { | |
e537352b | 455 | |
a16e1123 LP |
456 | if (m->control_pid <= 0) |
457 | return -EBADMSG; | |
e537352b | 458 | |
a16e1123 LP |
459 | if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0) |
460 | return r; | |
e537352b | 461 | |
a16e1123 LP |
462 | if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0) |
463 | return r; | |
464 | } | |
e537352b | 465 | |
a16e1123 LP |
466 | mount_set_state(m, new_state); |
467 | } | |
e537352b LP |
468 | |
469 | return 0; | |
e537352b LP |
470 | } |
471 | ||
472 | static void mount_dump(Unit *u, FILE *f, const char *prefix) { | |
473 | Mount *m = MOUNT(u); | |
474 | MountParameters *p; | |
475 | ||
476 | assert(m); | |
477 | assert(f); | |
478 | ||
479 | if (m->from_proc_self_mountinfo) | |
480 | p = &m->parameters_proc_self_mountinfo; | |
481 | else if (m->from_fragment) | |
482 | p = &m->parameters_fragment; | |
483 | else | |
484 | p = &m->parameters_etc_fstab; | |
485 | ||
486 | fprintf(f, | |
487 | "%sMount State: %s\n" | |
488 | "%sWhere: %s\n" | |
489 | "%sWhat: %s\n" | |
490 | "%sFile System Type: %s\n" | |
491 | "%sOptions: %s\n" | |
492 | "%sFrom /etc/fstab: %s\n" | |
493 | "%sFrom /proc/self/mountinfo: %s\n" | |
494 | "%sFrom fragment: %s\n" | |
495 | "%sKillMode: %s\n", | |
a16e1123 | 496 | prefix, mount_state_to_string(m->state), |
e537352b LP |
497 | prefix, m->where, |
498 | prefix, strna(p->what), | |
499 | prefix, strna(p->fstype), | |
500 | prefix, strna(p->options), | |
501 | prefix, yes_no(m->from_etc_fstab), | |
502 | prefix, yes_no(m->from_proc_self_mountinfo), | |
503 | prefix, yes_no(m->from_fragment), | |
504 | prefix, kill_mode_to_string(m->kill_mode)); | |
505 | ||
506 | if (m->control_pid > 0) | |
507 | fprintf(f, | |
508 | "%sControl PID: %llu\n", | |
509 | prefix, (unsigned long long) m->control_pid); | |
510 | ||
511 | exec_context_dump(&m->exec_context, f, prefix); | |
512 | } | |
513 | ||
a16e1123 LP |
514 | static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) { |
515 | pid_t pid; | |
516 | int r; | |
517 | ||
518 | assert(m); | |
519 | assert(c); | |
520 | assert(_pid); | |
521 | ||
522 | if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0) | |
523 | goto fail; | |
524 | ||
525 | if ((r = exec_spawn(c, | |
526 | NULL, | |
527 | &m->exec_context, | |
528 | NULL, 0, | |
1137a57c | 529 | m->meta.manager->environment, |
a16e1123 LP |
530 | true, |
531 | true, | |
532 | UNIT(m)->meta.manager->confirm_spawn, | |
533 | UNIT(m)->meta.cgroup_bondings, | |
534 | &pid)) < 0) | |
535 | goto fail; | |
536 | ||
537 | if ((r = unit_watch_pid(UNIT(m), pid)) < 0) | |
538 | /* FIXME: we need to do something here */ | |
539 | goto fail; | |
540 | ||
541 | *_pid = pid; | |
542 | ||
543 | return 0; | |
544 | ||
545 | fail: | |
546 | unit_unwatch_timer(UNIT(m), &m->timer_watch); | |
547 | ||
548 | return r; | |
549 | } | |
550 | ||
e537352b LP |
551 | static void mount_enter_dead(Mount *m, bool success) { |
552 | assert(m); | |
553 | ||
554 | if (!success) | |
555 | m->failure = true; | |
556 | ||
18c78fb1 | 557 | mount_set_state(m, m->failure ? MOUNT_MAINTENANCE : MOUNT_DEAD); |
e537352b LP |
558 | } |
559 | ||
80876c20 LP |
560 | static void mount_enter_mounted(Mount *m, bool success) { |
561 | assert(m); | |
562 | ||
563 | if (!success) | |
564 | m->failure = true; | |
565 | ||
566 | mount_set_state(m, MOUNT_MOUNTED); | |
567 | } | |
568 | ||
e537352b LP |
569 | static void mount_enter_signal(Mount *m, MountState state, bool success) { |
570 | int r; | |
80876c20 | 571 | bool sent = false; |
e537352b LP |
572 | |
573 | assert(m); | |
574 | ||
575 | if (!success) | |
576 | m->failure = true; | |
577 | ||
80876c20 LP |
578 | if (m->kill_mode != KILL_NONE) { |
579 | int sig = (state == MOUNT_MOUNTING_SIGTERM || | |
580 | state == MOUNT_UNMOUNTING_SIGTERM || | |
581 | state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL; | |
e537352b LP |
582 | |
583 | if (m->kill_mode == KILL_CONTROL_GROUP) { | |
584 | ||
585 | if ((r = cgroup_bonding_kill_list(UNIT(m)->meta.cgroup_bondings, sig)) < 0) { | |
586 | if (r != -EAGAIN && r != -ESRCH) | |
587 | goto fail; | |
588 | } else | |
589 | sent = true; | |
590 | } | |
591 | ||
80876c20 | 592 | if (!sent && m->control_pid > 0) |
e537352b LP |
593 | if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) { |
594 | r = -errno; | |
595 | goto fail; | |
596 | } | |
597 | } | |
598 | ||
80876c20 LP |
599 | if (sent) { |
600 | if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0) | |
601 | goto fail; | |
e537352b | 602 | |
80876c20 LP |
603 | mount_set_state(m, state); |
604 | } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL) | |
605 | mount_enter_mounted(m, true); | |
606 | else | |
e537352b LP |
607 | mount_enter_dead(m, true); |
608 | ||
609 | return; | |
610 | ||
611 | fail: | |
9e2f7c11 | 612 | log_warning("%s failed to kill processes: %s", UNIT(m)->meta.id, strerror(-r)); |
e537352b | 613 | |
80876c20 LP |
614 | if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL) |
615 | mount_enter_mounted(m, false); | |
616 | else | |
617 | mount_enter_dead(m, false); | |
e537352b LP |
618 | } |
619 | ||
620 | static void mount_enter_unmounting(Mount *m, bool success) { | |
e537352b LP |
621 | int r; |
622 | ||
623 | assert(m); | |
624 | ||
625 | if (!success) | |
626 | m->failure = true; | |
627 | ||
a16e1123 LP |
628 | m->control_command_id = MOUNT_EXEC_UNMOUNT; |
629 | m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT; | |
e537352b LP |
630 | |
631 | if ((r = exec_command_set( | |
a16e1123 | 632 | m->control_command, |
e537352b LP |
633 | "/bin/umount", |
634 | m->where, | |
635 | NULL)) < 0) | |
636 | goto fail; | |
637 | ||
a16e1123 | 638 | mount_unwatch_control_pid(m); |
5e94833f | 639 | |
a16e1123 | 640 | if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0) |
e537352b LP |
641 | goto fail; |
642 | ||
643 | mount_set_state(m, MOUNT_UNMOUNTING); | |
644 | ||
645 | return; | |
646 | ||
647 | fail: | |
6cf6bbc2 | 648 | log_warning("%s failed to run 'umount' task: %s", UNIT(m)->meta.id, strerror(-r)); |
e537352b LP |
649 | mount_enter_mounted(m, false); |
650 | } | |
651 | ||
8d567588 | 652 | static void mount_enter_mounting(Mount *m) { |
e537352b LP |
653 | int r; |
654 | ||
655 | assert(m); | |
656 | ||
a16e1123 LP |
657 | m->control_command_id = MOUNT_EXEC_MOUNT; |
658 | m->control_command = m->exec_command + MOUNT_EXEC_MOUNT; | |
e537352b LP |
659 | |
660 | if (m->from_fragment) | |
661 | r = exec_command_set( | |
a16e1123 | 662 | m->control_command, |
e537352b LP |
663 | "/bin/mount", |
664 | m->parameters_fragment.what, | |
665 | m->where, | |
666 | "-t", m->parameters_fragment.fstype, | |
8d567588 | 667 | m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options, |
e537352b LP |
668 | NULL); |
669 | else if (m->from_etc_fstab) | |
670 | r = exec_command_set( | |
a16e1123 | 671 | m->control_command, |
e537352b LP |
672 | "/bin/mount", |
673 | m->where, | |
674 | NULL); | |
675 | else | |
676 | r = -ENOENT; | |
677 | ||
678 | if (r < 0) | |
679 | goto fail; | |
680 | ||
a16e1123 | 681 | mount_unwatch_control_pid(m); |
5e94833f | 682 | |
a16e1123 | 683 | if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0) |
e537352b LP |
684 | goto fail; |
685 | ||
686 | mount_set_state(m, MOUNT_MOUNTING); | |
687 | ||
688 | return; | |
689 | ||
690 | fail: | |
6cf6bbc2 | 691 | log_warning("%s failed to run 'mount' task: %s", UNIT(m)->meta.id, strerror(-r)); |
e537352b LP |
692 | mount_enter_dead(m, false); |
693 | } | |
694 | ||
8d567588 | 695 | static void mount_enter_mounting_done(Mount *m) { |
e537352b LP |
696 | assert(m); |
697 | ||
e537352b LP |
698 | mount_set_state(m, MOUNT_MOUNTING_DONE); |
699 | } | |
700 | ||
701 | static void mount_enter_remounting(Mount *m, bool success) { | |
e537352b LP |
702 | int r; |
703 | ||
704 | assert(m); | |
705 | ||
706 | if (!success) | |
707 | m->failure = true; | |
708 | ||
a16e1123 LP |
709 | m->control_command_id = MOUNT_EXEC_REMOUNT; |
710 | m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT; | |
e537352b LP |
711 | |
712 | if (m->from_fragment) { | |
713 | char *buf = NULL; | |
714 | const char *o; | |
715 | ||
716 | if (m->parameters_fragment.options) { | |
717 | if (!(buf = strappend("remount,", m->parameters_fragment.options))) { | |
718 | r = -ENOMEM; | |
719 | goto fail; | |
720 | } | |
721 | ||
722 | o = buf; | |
723 | } else | |
724 | o = "remount"; | |
725 | ||
726 | r = exec_command_set( | |
a16e1123 | 727 | m->control_command, |
e537352b LP |
728 | "/bin/mount", |
729 | m->parameters_fragment.what, | |
730 | m->where, | |
731 | "-t", m->parameters_fragment.fstype, | |
732 | "-o", o, | |
733 | NULL); | |
734 | ||
735 | free(buf); | |
736 | } else if (m->from_etc_fstab) | |
737 | r = exec_command_set( | |
a16e1123 | 738 | m->control_command, |
e537352b LP |
739 | "/bin/mount", |
740 | m->where, | |
741 | "-o", "remount", | |
742 | NULL); | |
743 | else | |
744 | r = -ENOENT; | |
745 | ||
746 | if (r < 0) { | |
747 | r = -ENOMEM; | |
748 | goto fail; | |
749 | } | |
750 | ||
a16e1123 | 751 | mount_unwatch_control_pid(m); |
5e94833f | 752 | |
a16e1123 | 753 | if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0) |
e537352b LP |
754 | goto fail; |
755 | ||
756 | mount_set_state(m, MOUNT_REMOUNTING); | |
757 | ||
758 | return; | |
759 | ||
760 | fail: | |
761 | mount_enter_mounted(m, false); | |
762 | } | |
763 | ||
764 | static int mount_start(Unit *u) { | |
765 | Mount *m = MOUNT(u); | |
766 | ||
767 | assert(m); | |
768 | ||
769 | /* We cannot fulfill this request right now, try again later | |
770 | * please! */ | |
771 | if (m->state == MOUNT_UNMOUNTING || | |
772 | m->state == MOUNT_UNMOUNTING_SIGTERM || | |
773 | m->state == MOUNT_UNMOUNTING_SIGKILL) | |
774 | return -EAGAIN; | |
775 | ||
776 | /* Already on it! */ | |
777 | if (m->state == MOUNT_MOUNTING || | |
778 | m->state == MOUNT_MOUNTING_SIGTERM || | |
779 | m->state == MOUNT_MOUNTING_SIGKILL) | |
780 | return 0; | |
781 | ||
18c78fb1 | 782 | assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTENANCE); |
e537352b LP |
783 | |
784 | m->failure = false; | |
8d567588 | 785 | mount_enter_mounting(m); |
e537352b LP |
786 | return 0; |
787 | } | |
788 | ||
789 | static int mount_stop(Unit *u) { | |
790 | Mount *m = MOUNT(u); | |
791 | ||
792 | assert(m); | |
793 | ||
794 | /* Cann't do this right now. */ | |
795 | if (m->state == MOUNT_MOUNTING || | |
796 | m->state == MOUNT_MOUNTING_DONE || | |
797 | m->state == MOUNT_MOUNTING_SIGTERM || | |
798 | m->state == MOUNT_MOUNTING_SIGKILL || | |
799 | m->state == MOUNT_REMOUNTING || | |
800 | m->state == MOUNT_REMOUNTING_SIGTERM || | |
801 | m->state == MOUNT_REMOUNTING_SIGKILL) | |
802 | return -EAGAIN; | |
803 | ||
804 | /* Already on it */ | |
805 | if (m->state == MOUNT_UNMOUNTING || | |
806 | m->state == MOUNT_UNMOUNTING_SIGKILL || | |
807 | m->state == MOUNT_UNMOUNTING_SIGTERM) | |
808 | return 0; | |
809 | ||
810 | assert(m->state == MOUNT_MOUNTED); | |
811 | ||
812 | mount_enter_unmounting(m, true); | |
813 | return 0; | |
814 | } | |
815 | ||
816 | static int mount_reload(Unit *u) { | |
817 | Mount *m = MOUNT(u); | |
818 | ||
819 | assert(m); | |
820 | ||
821 | if (m->state == MOUNT_MOUNTING_DONE) | |
822 | return -EAGAIN; | |
823 | ||
824 | assert(m->state == MOUNT_MOUNTED); | |
825 | ||
826 | mount_enter_remounting(m, true); | |
827 | return 0; | |
828 | } | |
829 | ||
a16e1123 LP |
830 | static int mount_serialize(Unit *u, FILE *f, FDSet *fds) { |
831 | Mount *m = MOUNT(u); | |
832 | ||
833 | assert(m); | |
834 | assert(f); | |
835 | assert(fds); | |
836 | ||
837 | unit_serialize_item(u, f, "state", mount_state_to_string(m->state)); | |
838 | unit_serialize_item(u, f, "failure", yes_no(m->failure)); | |
839 | ||
840 | if (m->control_pid > 0) | |
5925dd3c | 841 | unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid); |
a16e1123 LP |
842 | |
843 | if (m->control_command_id >= 0) | |
844 | unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id)); | |
845 | ||
846 | return 0; | |
847 | } | |
848 | ||
849 | static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
850 | Mount *m = MOUNT(u); | |
851 | int r; | |
852 | ||
853 | assert(u); | |
854 | assert(key); | |
855 | assert(value); | |
856 | assert(fds); | |
857 | ||
858 | if (streq(key, "state")) { | |
859 | MountState state; | |
860 | ||
861 | if ((state = mount_state_from_string(value)) < 0) | |
862 | log_debug("Failed to parse state value %s", value); | |
863 | else | |
864 | m->deserialized_state = state; | |
865 | } else if (streq(key, "failure")) { | |
866 | int b; | |
867 | ||
868 | if ((b = parse_boolean(value)) < 0) | |
869 | log_debug("Failed to parse failure value %s", value); | |
870 | else | |
871 | m->failure = b || m->failure; | |
872 | ||
873 | } else if (streq(key, "control-pid")) { | |
5925dd3c | 874 | pid_t pid; |
a16e1123 | 875 | |
5925dd3c | 876 | if ((r = parse_pid(value, &pid)) < 0) |
a16e1123 LP |
877 | log_debug("Failed to parse control-pid value %s", value); |
878 | else | |
5925dd3c | 879 | m->control_pid = pid; |
a16e1123 LP |
880 | } else if (streq(key, "control-command")) { |
881 | MountExecCommand id; | |
882 | ||
883 | if ((id = mount_exec_command_from_string(value)) < 0) | |
884 | log_debug("Failed to parse exec-command value %s", value); | |
885 | else { | |
886 | m->control_command_id = id; | |
887 | m->control_command = m->exec_command + id; | |
888 | } | |
889 | ||
890 | } else | |
891 | log_debug("Unknown serialization key '%s'", key); | |
892 | ||
893 | return 0; | |
894 | } | |
895 | ||
e537352b LP |
896 | static UnitActiveState mount_active_state(Unit *u) { |
897 | assert(u); | |
898 | ||
899 | return state_translation_table[MOUNT(u)->state]; | |
900 | } | |
901 | ||
10a94420 LP |
902 | static const char *mount_sub_state_to_string(Unit *u) { |
903 | assert(u); | |
904 | ||
a16e1123 | 905 | return mount_state_to_string(MOUNT(u)->state); |
10a94420 LP |
906 | } |
907 | ||
701cc384 LP |
908 | static bool mount_check_gc(Unit *u) { |
909 | Mount *m = MOUNT(u); | |
910 | ||
911 | assert(m); | |
912 | ||
913 | return m->from_etc_fstab || m->from_proc_self_mountinfo; | |
914 | } | |
915 | ||
e537352b LP |
916 | static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
917 | Mount *m = MOUNT(u); | |
918 | bool success; | |
919 | ||
920 | assert(m); | |
921 | assert(pid >= 0); | |
922 | ||
8c47c732 LP |
923 | if (pid != m->control_pid) |
924 | return; | |
e537352b | 925 | |
e537352b LP |
926 | m->control_pid = 0; |
927 | ||
8c47c732 LP |
928 | success = is_clean_exit(code, status); |
929 | m->failure = m->failure || !success; | |
930 | ||
a16e1123 LP |
931 | if (m->control_command) { |
932 | exec_status_fill(&m->control_command->exec_status, pid, code, status); | |
933 | m->control_command = NULL; | |
934 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
935 | } | |
936 | ||
9e2f7c11 | 937 | log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status); |
e537352b LP |
938 | |
939 | /* Note that mount(8) returning and the kernel sending us a | |
940 | * mount table change event might happen out-of-order. If an | |
941 | * operation succeed we assume the kernel will follow soon too | |
942 | * and already change into the resulting state. If it fails | |
943 | * we check if the kernel still knows about the mount. and | |
944 | * change state accordingly. */ | |
945 | ||
946 | switch (m->state) { | |
947 | ||
948 | case MOUNT_MOUNTING: | |
949 | case MOUNT_MOUNTING_DONE: | |
950 | case MOUNT_MOUNTING_SIGKILL: | |
951 | case MOUNT_MOUNTING_SIGTERM: | |
952 | case MOUNT_REMOUNTING: | |
953 | case MOUNT_REMOUNTING_SIGKILL: | |
954 | case MOUNT_REMOUNTING_SIGTERM: | |
955 | ||
19b160fa | 956 | if (success) |
e537352b LP |
957 | mount_enter_mounted(m, true); |
958 | else if (m->from_proc_self_mountinfo) | |
959 | mount_enter_mounted(m, false); | |
960 | else | |
961 | mount_enter_dead(m, false); | |
962 | break; | |
963 | ||
964 | case MOUNT_UNMOUNTING: | |
965 | case MOUNT_UNMOUNTING_SIGKILL: | |
966 | case MOUNT_UNMOUNTING_SIGTERM: | |
967 | ||
968 | if (success) | |
969 | mount_enter_dead(m, true); | |
970 | else if (m->from_proc_self_mountinfo) | |
971 | mount_enter_mounted(m, false); | |
972 | else | |
973 | mount_enter_dead(m, false); | |
974 | break; | |
975 | ||
976 | default: | |
977 | assert_not_reached("Uh, control process died at wrong time."); | |
978 | } | |
979 | } | |
980 | ||
981 | static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) { | |
982 | Mount *m = MOUNT(u); | |
983 | ||
984 | assert(m); | |
985 | assert(elapsed == 1); | |
986 | assert(w == &m->timer_watch); | |
987 | ||
988 | switch (m->state) { | |
989 | ||
990 | case MOUNT_MOUNTING: | |
991 | case MOUNT_MOUNTING_DONE: | |
9e2f7c11 | 992 | log_warning("%s mounting timed out. Stopping.", u->meta.id); |
e537352b LP |
993 | mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false); |
994 | break; | |
995 | ||
996 | case MOUNT_REMOUNTING: | |
9e2f7c11 | 997 | log_warning("%s remounting timed out. Stopping.", u->meta.id); |
e537352b LP |
998 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false); |
999 | break; | |
1000 | ||
1001 | case MOUNT_UNMOUNTING: | |
9e2f7c11 | 1002 | log_warning("%s unmounting timed out. Stopping.", u->meta.id); |
e537352b LP |
1003 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false); |
1004 | break; | |
1005 | ||
1006 | case MOUNT_MOUNTING_SIGTERM: | |
9e2f7c11 | 1007 | log_warning("%s mounting timed out. Killing.", u->meta.id); |
e537352b LP |
1008 | mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false); |
1009 | break; | |
1010 | ||
1011 | case MOUNT_REMOUNTING_SIGTERM: | |
9e2f7c11 | 1012 | log_warning("%s remounting timed out. Killing.", u->meta.id); |
e537352b LP |
1013 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false); |
1014 | break; | |
1015 | ||
1016 | case MOUNT_UNMOUNTING_SIGTERM: | |
9e2f7c11 | 1017 | log_warning("%s unmounting timed out. Killing.", u->meta.id); |
e537352b LP |
1018 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false); |
1019 | break; | |
1020 | ||
1021 | case MOUNT_MOUNTING_SIGKILL: | |
1022 | case MOUNT_REMOUNTING_SIGKILL: | |
1023 | case MOUNT_UNMOUNTING_SIGKILL: | |
9e2f7c11 | 1024 | log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id); |
e537352b LP |
1025 | |
1026 | if (m->from_proc_self_mountinfo) | |
1027 | mount_enter_mounted(m, false); | |
1028 | else | |
1029 | mount_enter_dead(m, false); | |
1030 | break; | |
1031 | ||
1032 | default: | |
1033 | assert_not_reached("Timeout at wrong time."); | |
1034 | } | |
1035 | } | |
1036 | ||
1037 | static int mount_add_one( | |
1038 | Manager *m, | |
1039 | const char *what, | |
1040 | const char *where, | |
1041 | const char *options, | |
1042 | const char *fstype, | |
1043 | bool from_proc_self_mountinfo, | |
1044 | bool set_flags) { | |
b08d03ff LP |
1045 | int r; |
1046 | Unit *u; | |
1047 | bool delete; | |
e537352b | 1048 | char *e, *w = NULL, *o = NULL, *f = NULL; |
4e85aff4 | 1049 | MountParameters *p; |
b08d03ff | 1050 | |
f50e0a01 | 1051 | assert(m); |
b08d03ff LP |
1052 | assert(what); |
1053 | assert(where); | |
e537352b LP |
1054 | assert(options); |
1055 | assert(fstype); | |
1056 | ||
1057 | assert(!set_flags || from_proc_self_mountinfo); | |
1058 | ||
1059 | /* Ignore API mount points. They should never be referenced in | |
1060 | * dependencies ever. */ | |
1061 | if (mount_point_is_api(where)) | |
1062 | return 0; | |
b08d03ff | 1063 | |
8d567588 LP |
1064 | if (streq(fstype, "autofs")) |
1065 | return 0; | |
1066 | ||
4e85aff4 LP |
1067 | /* probably some kind of swap, ignore */ |
1068 | if (!is_path(where)) | |
b08d03ff LP |
1069 | return 0; |
1070 | ||
a16e1123 | 1071 | if (!(e = unit_name_from_path(where, ".mount"))) |
b08d03ff LP |
1072 | return -ENOMEM; |
1073 | ||
1074 | if (!(u = manager_get_unit(m, e))) { | |
1075 | delete = true; | |
1076 | ||
1077 | if (!(u = unit_new(m))) { | |
1078 | free(e); | |
1079 | return -ENOMEM; | |
1080 | } | |
1081 | ||
1082 | r = unit_add_name(u, e); | |
1083 | free(e); | |
1084 | ||
1085 | if (r < 0) | |
1086 | goto fail; | |
1087 | ||
e537352b | 1088 | if (!(MOUNT(u)->where = strdup(where))) { |
07b0b134 ML |
1089 | r = -ENOMEM; |
1090 | goto fail; | |
1091 | } | |
f50e0a01 | 1092 | |
f94ea366 | 1093 | unit_add_to_load_queue(u); |
b08d03ff LP |
1094 | } else { |
1095 | delete = false; | |
1096 | free(e); | |
1097 | } | |
1098 | ||
e537352b LP |
1099 | if (!(w = strdup(what)) || |
1100 | !(o = strdup(options)) || | |
1101 | !(f = strdup(fstype))) { | |
1102 | r = -ENOMEM; | |
1103 | goto fail; | |
1104 | } | |
1105 | ||
1106 | if (from_proc_self_mountinfo) { | |
4e85aff4 | 1107 | p = &MOUNT(u)->parameters_proc_self_mountinfo; |
e537352b LP |
1108 | |
1109 | if (set_flags) { | |
1110 | MOUNT(u)->is_mounted = true; | |
1111 | MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo; | |
4e85aff4 | 1112 | MOUNT(u)->just_changed = !streq_ptr(p->options, o); |
e537352b | 1113 | } |
ef734fd6 | 1114 | |
f50e0a01 | 1115 | MOUNT(u)->from_proc_self_mountinfo = true; |
ef734fd6 | 1116 | } else { |
4e85aff4 | 1117 | p = &MOUNT(u)->parameters_etc_fstab; |
f50e0a01 | 1118 | MOUNT(u)->from_etc_fstab = true; |
ef734fd6 | 1119 | } |
f50e0a01 | 1120 | |
4e85aff4 LP |
1121 | free(p->what); |
1122 | p->what = w; | |
b08d03ff | 1123 | |
4e85aff4 LP |
1124 | free(p->options); |
1125 | p->options = o; | |
e537352b | 1126 | |
4e85aff4 LP |
1127 | free(p->fstype); |
1128 | p->fstype = f; | |
b08d03ff | 1129 | |
c1e1601e LP |
1130 | unit_add_to_dbus_queue(u); |
1131 | ||
b08d03ff LP |
1132 | return 0; |
1133 | ||
1134 | fail: | |
e537352b LP |
1135 | free(w); |
1136 | free(o); | |
1137 | free(f); | |
1138 | ||
b08d03ff LP |
1139 | if (delete && u) |
1140 | unit_free(u); | |
1141 | ||
4e85aff4 | 1142 | return r; |
b08d03ff LP |
1143 | } |
1144 | ||
1145 | static char *fstab_node_to_udev_node(char *p) { | |
1146 | char *dn, *t; | |
1147 | int r; | |
1148 | ||
1149 | /* FIXME: to follow udev's logic 100% we need to leave valid | |
1150 | * UTF8 chars unescaped */ | |
1151 | ||
1152 | if (startswith(p, "LABEL=")) { | |
1153 | ||
f50e0a01 | 1154 | if (!(t = xescape(p+6, "/ "))) |
b08d03ff LP |
1155 | return NULL; |
1156 | ||
f50e0a01 | 1157 | r = asprintf(&dn, "/dev/disk/by-label/%s", t); |
b08d03ff LP |
1158 | free(t); |
1159 | ||
1160 | if (r < 0) | |
1161 | return NULL; | |
1162 | ||
1163 | return dn; | |
1164 | } | |
1165 | ||
1166 | if (startswith(p, "UUID=")) { | |
1167 | ||
f50e0a01 | 1168 | if (!(t = xescape(p+5, "/ "))) |
b08d03ff LP |
1169 | return NULL; |
1170 | ||
f50e0a01 | 1171 | r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t)); |
b08d03ff LP |
1172 | free(t); |
1173 | ||
1174 | if (r < 0) | |
1175 | return NULL; | |
1176 | ||
1177 | return dn; | |
1178 | } | |
1179 | ||
1180 | return strdup(p); | |
1181 | } | |
1182 | ||
07b0b134 ML |
1183 | static int mount_find_pri(char *options) { |
1184 | char *end, *pri; | |
1185 | unsigned long r; | |
1186 | ||
1187 | if (!(pri = mount_test_option(options, "pri="))) | |
1188 | return 0; | |
1189 | ||
1190 | pri += 4; | |
1191 | ||
1192 | errno = 0; | |
1193 | r = strtoul(pri, &end, 10); | |
1194 | ||
1195 | if (errno != 0) | |
1196 | return -errno; | |
1197 | ||
1198 | if (end == pri || (*end != ',' && *end != 0)) | |
1199 | return -EINVAL; | |
1200 | ||
1201 | return (int) r; | |
1202 | } | |
1203 | ||
e537352b | 1204 | static int mount_load_etc_fstab(Manager *m) { |
b08d03ff LP |
1205 | FILE *f; |
1206 | int r; | |
1207 | struct mntent* me; | |
1208 | ||
1209 | assert(m); | |
1210 | ||
1211 | errno = 0; | |
1212 | if (!(f = setmntent("/etc/fstab", "r"))) | |
1213 | return -errno; | |
1214 | ||
1215 | while ((me = getmntent(f))) { | |
1216 | char *where, *what; | |
1217 | ||
1218 | if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) { | |
1219 | r = -ENOMEM; | |
1220 | goto finish; | |
1221 | } | |
1222 | ||
1223 | if (!(where = strdup(me->mnt_dir))) { | |
1224 | free(what); | |
1225 | r = -ENOMEM; | |
1226 | goto finish; | |
1227 | } | |
1228 | ||
1229 | if (what[0] == '/') | |
1230 | path_kill_slashes(what); | |
1231 | ||
1232 | if (where[0] == '/') | |
1233 | path_kill_slashes(where); | |
1234 | ||
07b0b134 ML |
1235 | if (streq(me->mnt_type, "swap")) { |
1236 | int pri; | |
1237 | ||
1238 | if ((pri = mount_find_pri(me->mnt_opts)) < 0) | |
1239 | r = pri; | |
1240 | else | |
1241 | r = swap_add_one(m, | |
1242 | what, | |
07b0b134 | 1243 | pri, |
4e85aff4 LP |
1244 | !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO), |
1245 | !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"), | |
07b0b134 ML |
1246 | false); |
1247 | } else | |
1248 | r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false); | |
1249 | ||
b08d03ff LP |
1250 | free(what); |
1251 | free(where); | |
1252 | ||
1253 | if (r < 0) | |
1254 | goto finish; | |
1255 | } | |
1256 | ||
1257 | r = 0; | |
1258 | finish: | |
1259 | ||
1260 | endmntent(f); | |
1261 | return r; | |
1262 | } | |
1263 | ||
ef734fd6 | 1264 | static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { |
b08d03ff | 1265 | int r; |
a2e0f3d3 | 1266 | char *device, *path, *options, *options2, *fstype, *d, *p, *o; |
b08d03ff LP |
1267 | |
1268 | assert(m); | |
1269 | ||
ef734fd6 | 1270 | rewind(m->proc_self_mountinfo); |
b08d03ff LP |
1271 | |
1272 | for (;;) { | |
1273 | int k; | |
e537352b | 1274 | |
a2e0f3d3 | 1275 | device = path = options = options2 = fstype = d = p = o = NULL; |
b08d03ff | 1276 | |
ef734fd6 | 1277 | if ((k = fscanf(m->proc_self_mountinfo, |
b08d03ff LP |
1278 | "%*s " /* (1) mount id */ |
1279 | "%*s " /* (2) parent id */ | |
1280 | "%*s " /* (3) major:minor */ | |
1281 | "%*s " /* (4) root */ | |
1282 | "%ms " /* (5) mount point */ | |
e537352b | 1283 | "%ms" /* (6) mount options */ |
b08d03ff LP |
1284 | "%*[^-]" /* (7) optional fields */ |
1285 | "- " /* (8) seperator */ | |
e537352b | 1286 | "%ms " /* (9) file system type */ |
ef734fd6 | 1287 | "%ms" /* (10) mount source */ |
a2e0f3d3 | 1288 | "%ms" /* (11) mount options 2 */ |
ef734fd6 | 1289 | "%*[^\n]", /* some rubbish at the end */ |
b08d03ff | 1290 | &path, |
e537352b LP |
1291 | &options, |
1292 | &fstype, | |
a2e0f3d3 LP |
1293 | &device, |
1294 | &options2)) != 5) { | |
b08d03ff | 1295 | |
ef734fd6 LP |
1296 | if (k == EOF) |
1297 | break; | |
b08d03ff | 1298 | |
e537352b LP |
1299 | r = -EBADMSG; |
1300 | goto finish; | |
b08d03ff LP |
1301 | } |
1302 | ||
a2e0f3d3 LP |
1303 | if (asprintf(&o, "%s,%s", options, options2) < 0) { |
1304 | r = -ENOMEM; | |
1305 | goto finish; | |
1306 | } | |
1307 | ||
e537352b LP |
1308 | if (!(d = cunescape(device)) || |
1309 | !(p = cunescape(path))) { | |
1310 | r = -ENOMEM; | |
1311 | goto finish; | |
b08d03ff | 1312 | } |
b08d03ff | 1313 | |
a2e0f3d3 | 1314 | if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0) |
e537352b | 1315 | goto finish; |
b08d03ff | 1316 | |
e537352b LP |
1317 | free(device); |
1318 | free(path); | |
1319 | free(options); | |
a2e0f3d3 | 1320 | free(options2); |
e537352b | 1321 | free(fstype); |
b08d03ff LP |
1322 | free(d); |
1323 | free(p); | |
a2e0f3d3 | 1324 | free(o); |
b08d03ff LP |
1325 | } |
1326 | ||
e537352b LP |
1327 | r = 0; |
1328 | ||
1329 | finish: | |
1330 | free(device); | |
1331 | free(path); | |
1332 | free(options); | |
a2e0f3d3 | 1333 | free(options2); |
e537352b LP |
1334 | free(fstype); |
1335 | free(d); | |
1336 | free(p); | |
a2e0f3d3 | 1337 | free(o); |
e537352b LP |
1338 | |
1339 | return r; | |
1340 | } | |
1341 | ||
1342 | static void mount_shutdown(Manager *m) { | |
1343 | assert(m); | |
1344 | ||
a16e1123 | 1345 | if (m->proc_self_mountinfo) { |
e537352b | 1346 | fclose(m->proc_self_mountinfo); |
a16e1123 LP |
1347 | m->proc_self_mountinfo = NULL; |
1348 | } | |
b08d03ff LP |
1349 | } |
1350 | ||
1351 | static int mount_enumerate(Manager *m) { | |
1352 | int r; | |
ef734fd6 | 1353 | struct epoll_event ev; |
b08d03ff LP |
1354 | assert(m); |
1355 | ||
a16e1123 LP |
1356 | if (!m->proc_self_mountinfo) { |
1357 | if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re"))) | |
1358 | return -errno; | |
ef734fd6 | 1359 | |
a16e1123 LP |
1360 | m->mount_watch.type = WATCH_MOUNT; |
1361 | m->mount_watch.fd = fileno(m->proc_self_mountinfo); | |
ef734fd6 | 1362 | |
a16e1123 LP |
1363 | zero(ev); |
1364 | ev.events = EPOLLERR; | |
1365 | ev.data.ptr = &m->mount_watch; | |
ef734fd6 | 1366 | |
a16e1123 LP |
1367 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0) |
1368 | return -errno; | |
1369 | } | |
ef734fd6 | 1370 | |
e537352b | 1371 | if ((r = mount_load_etc_fstab(m)) < 0) |
b08d03ff LP |
1372 | goto fail; |
1373 | ||
ef734fd6 | 1374 | if ((r = mount_load_proc_self_mountinfo(m, false)) < 0) |
b08d03ff LP |
1375 | goto fail; |
1376 | ||
1377 | return 0; | |
1378 | ||
1379 | fail: | |
1380 | mount_shutdown(m); | |
1381 | return r; | |
5cb5a6ff LP |
1382 | } |
1383 | ||
ef734fd6 LP |
1384 | void mount_fd_event(Manager *m, int events) { |
1385 | Meta *meta; | |
1386 | int r; | |
1387 | ||
1388 | assert(m); | |
f94ea366 | 1389 | assert(events == EPOLLERR); |
ef734fd6 LP |
1390 | |
1391 | /* The manager calls this for every fd event happening on the | |
1392 | * /proc/self/mountinfo file, which informs us about mounting | |
1393 | * table changes */ | |
1394 | ||
1395 | if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) { | |
d9a76d8f | 1396 | log_error("Failed to reread /proc/self/mountinfo: %s", strerror(errno)); |
e537352b LP |
1397 | |
1398 | /* Reset flags, just in case, for later calls */ | |
1399 | LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) { | |
1400 | Mount *mount = (Mount*) meta; | |
1401 | ||
1402 | mount->is_mounted = mount->just_mounted = mount->just_changed = false; | |
1403 | } | |
1404 | ||
ef734fd6 LP |
1405 | return; |
1406 | } | |
1407 | ||
1408 | manager_dispatch_load_queue(m); | |
1409 | ||
1410 | LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) { | |
1411 | Mount *mount = (Mount*) meta; | |
1412 | ||
e537352b LP |
1413 | if (!mount->is_mounted) { |
1414 | /* This has just been unmounted. */ | |
1415 | ||
ef734fd6 | 1416 | mount->from_proc_self_mountinfo = false; |
e537352b LP |
1417 | |
1418 | switch (mount->state) { | |
1419 | ||
1420 | case MOUNT_MOUNTED: | |
1421 | mount_enter_dead(mount, true); | |
1422 | break; | |
1423 | ||
1424 | default: | |
1425 | mount_set_state(mount, mount->state); | |
1426 | break; | |
1427 | ||
1428 | } | |
1429 | ||
1430 | } else if (mount->just_mounted || mount->just_changed) { | |
1431 | ||
1432 | /* New or changed entrymount */ | |
1433 | ||
1434 | switch (mount->state) { | |
1435 | ||
1436 | case MOUNT_DEAD: | |
18c78fb1 | 1437 | case MOUNT_MAINTENANCE: |
e537352b LP |
1438 | mount_enter_mounted(mount, true); |
1439 | break; | |
1440 | ||
1441 | case MOUNT_MOUNTING: | |
8d567588 | 1442 | mount_enter_mounting_done(mount); |
e537352b LP |
1443 | break; |
1444 | ||
1445 | default: | |
1446 | /* Nothing really changed, but let's | |
1447 | * issue an notification call | |
1448 | * nonetheless, in case somebody is | |
1449 | * waiting for this. (e.g. file system | |
1450 | * ro/rw remounts.) */ | |
1451 | mount_set_state(mount, mount->state); | |
1452 | break; | |
1453 | } | |
1454 | } | |
1455 | ||
1456 | /* Reset the flags for later calls */ | |
1457 | mount->is_mounted = mount->just_mounted = mount->just_changed = false; | |
1458 | } | |
1459 | } | |
1460 | ||
1461 | int mount_path_is_mounted(Manager *m, const char* path) { | |
1462 | char *t; | |
1463 | int r; | |
1464 | ||
1465 | assert(m); | |
1466 | assert(path); | |
1467 | ||
1468 | if (path[0] != '/') | |
1469 | return 1; | |
1470 | ||
1471 | if (!(t = strdup(path))) | |
1472 | return -ENOMEM; | |
1473 | ||
1474 | path_kill_slashes(t); | |
1475 | ||
1476 | for (;;) { | |
1477 | char *e, *slash; | |
1478 | Unit *u; | |
1479 | ||
a16e1123 | 1480 | if (!(e = unit_name_from_path(t, ".mount"))) { |
e537352b LP |
1481 | r = -ENOMEM; |
1482 | goto finish; | |
1483 | } | |
1484 | ||
1485 | u = manager_get_unit(m, e); | |
1486 | free(e); | |
1487 | ||
1488 | if (u && | |
1489 | (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) && | |
1490 | MOUNT(u)->state != MOUNT_MOUNTED) { | |
1491 | r = 0; | |
1492 | goto finish; | |
ef734fd6 LP |
1493 | } |
1494 | ||
e537352b LP |
1495 | assert_se(slash = strrchr(t, '/')); |
1496 | ||
1497 | if (slash == t) { | |
1498 | r = 1; | |
1499 | goto finish; | |
1500 | } | |
1501 | ||
1502 | *slash = 0; | |
ef734fd6 | 1503 | } |
e537352b LP |
1504 | |
1505 | r = 1; | |
1506 | ||
1507 | finish: | |
1508 | free(t); | |
1509 | return r; | |
ef734fd6 LP |
1510 | } |
1511 | ||
a16e1123 LP |
1512 | static const char* const mount_state_table[_MOUNT_STATE_MAX] = { |
1513 | [MOUNT_DEAD] = "dead", | |
1514 | [MOUNT_MOUNTING] = "mounting", | |
1515 | [MOUNT_MOUNTING_DONE] = "mounting-done", | |
1516 | [MOUNT_MOUNTED] = "mounted", | |
1517 | [MOUNT_REMOUNTING] = "remounting", | |
1518 | [MOUNT_UNMOUNTING] = "unmounting", | |
1519 | [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm", | |
1520 | [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill", | |
1521 | [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm", | |
1522 | [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill", | |
1523 | [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm", | |
1524 | [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill", | |
18c78fb1 | 1525 | [MOUNT_MAINTENANCE] = "maintenance" |
a16e1123 LP |
1526 | }; |
1527 | ||
1528 | DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState); | |
1529 | ||
1530 | static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = { | |
1531 | [MOUNT_EXEC_MOUNT] = "ExecMount", | |
1532 | [MOUNT_EXEC_UNMOUNT] = "ExecUnmount", | |
1533 | [MOUNT_EXEC_REMOUNT] = "ExecRemount", | |
1534 | }; | |
1535 | ||
1536 | DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand); | |
1537 | ||
87f0e418 | 1538 | const UnitVTable mount_vtable = { |
5cb5a6ff LP |
1539 | .suffix = ".mount", |
1540 | ||
e537352b | 1541 | .no_alias = true, |
9e2f7c11 | 1542 | .no_instances = true, |
c497c7a9 | 1543 | .no_isolate = true, |
e537352b LP |
1544 | |
1545 | .init = mount_init, | |
1546 | .load = mount_load, | |
034c6ed7 | 1547 | .done = mount_done, |
e537352b | 1548 | |
f50e0a01 LP |
1549 | .coldplug = mount_coldplug, |
1550 | ||
034c6ed7 | 1551 | .dump = mount_dump, |
5cb5a6ff | 1552 | |
e537352b LP |
1553 | .start = mount_start, |
1554 | .stop = mount_stop, | |
1555 | .reload = mount_reload, | |
1556 | ||
a16e1123 LP |
1557 | .serialize = mount_serialize, |
1558 | .deserialize_item = mount_deserialize_item, | |
1559 | ||
f50e0a01 | 1560 | .active_state = mount_active_state, |
10a94420 | 1561 | .sub_state_to_string = mount_sub_state_to_string, |
b08d03ff | 1562 | |
701cc384 LP |
1563 | .check_gc = mount_check_gc, |
1564 | ||
e537352b LP |
1565 | .sigchld_event = mount_sigchld_event, |
1566 | .timer_event = mount_timer_event, | |
1567 | ||
4139c1b2 LP |
1568 | .bus_message_handler = bus_mount_message_handler, |
1569 | ||
f50e0a01 LP |
1570 | .enumerate = mount_enumerate, |
1571 | .shutdown = mount_shutdown | |
5cb5a6ff | 1572 | }; |