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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, |
032ff4af | 45 | [MOUNT_REMOUNTING] = UNIT_RELOADING, |
f50e0a01 | 46 | [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING, |
e537352b LP |
47 | [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING, |
48 | [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING, | |
032ff4af LP |
49 | [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING, |
50 | [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING, | |
e537352b LP |
51 | [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING, |
52 | [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING, | |
032ff4af | 53 | [MOUNT_MAINTENANCE] = UNIT_MAINTENANCE |
f50e0a01 | 54 | }; |
5cb5a6ff | 55 | |
a16e1123 LP |
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; | |
3e5235b0 LP |
63 | m->directory_mode = 0755; |
64 | ||
c3686083 LP |
65 | exec_context_init(&m->exec_context); |
66 | ||
a16e1123 LP |
67 | /* We need to make sure that /bin/mount is always called in |
68 | * the same process group as us, so that the autofs kernel | |
69 | * side doesn't send us another mount request while we are | |
70 | * already trying to comply its last one. */ | |
74922904 | 71 | m->exec_context.same_pgrp = true; |
8d567588 | 72 | |
a16e1123 LP |
73 | m->timer_watch.type = WATCH_INVALID; |
74 | ||
75 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
8d567588 LP |
76 | } |
77 | ||
a16e1123 | 78 | static void mount_unwatch_control_pid(Mount *m) { |
5e94833f LP |
79 | assert(m); |
80 | ||
81 | if (m->control_pid <= 0) | |
82 | return; | |
83 | ||
84 | unit_unwatch_pid(UNIT(m), m->control_pid); | |
85 | m->control_pid = 0; | |
86 | } | |
87 | ||
e537352b LP |
88 | static void mount_parameters_done(MountParameters *p) { |
89 | assert(p); | |
90 | ||
91 | free(p->what); | |
92 | free(p->options); | |
93 | free(p->fstype); | |
94 | ||
95 | p->what = p->options = p->fstype = NULL; | |
96 | } | |
97 | ||
87f0e418 | 98 | static void mount_done(Unit *u) { |
ef734fd6 | 99 | Mount *m = MOUNT(u); |
034c6ed7 | 100 | |
ef734fd6 | 101 | assert(m); |
034c6ed7 | 102 | |
e537352b LP |
103 | free(m->where); |
104 | m->where = NULL; | |
f50e0a01 | 105 | |
e537352b LP |
106 | mount_parameters_done(&m->parameters_etc_fstab); |
107 | mount_parameters_done(&m->parameters_proc_self_mountinfo); | |
108 | mount_parameters_done(&m->parameters_fragment); | |
ef734fd6 | 109 | |
e537352b LP |
110 | exec_context_done(&m->exec_context); |
111 | exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX); | |
112 | m->control_command = NULL; | |
f50e0a01 | 113 | |
a16e1123 | 114 | mount_unwatch_control_pid(m); |
f50e0a01 | 115 | |
e537352b | 116 | unit_unwatch_timer(u, &m->timer_watch); |
f50e0a01 LP |
117 | } |
118 | ||
6e2ef85b LP |
119 | static int mount_add_mount_links(Mount *m) { |
120 | Meta *other; | |
b08d03ff LP |
121 | int r; |
122 | ||
6e2ef85b | 123 | assert(m); |
b08d03ff | 124 | |
6e2ef85b LP |
125 | /* Adds in links to other mount points that might lie below or |
126 | * above us in the hierarchy */ | |
e537352b | 127 | |
6e2ef85b LP |
128 | LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) { |
129 | Mount *n = (Mount*) other; | |
07b0b134 | 130 | |
6e2ef85b LP |
131 | if (n == m) |
132 | continue; | |
b08d03ff | 133 | |
6e2ef85b LP |
134 | if (n->meta.load_state != UNIT_LOADED) |
135 | continue; | |
b08d03ff | 136 | |
6e2ef85b | 137 | if (path_startswith(m->where, n->where)) { |
b08d03ff | 138 | |
6e2ef85b LP |
139 | if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0) |
140 | return r; | |
b08d03ff | 141 | |
6e2ef85b LP |
142 | if (n->from_etc_fstab || n->from_fragment) |
143 | if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0) | |
144 | return r; | |
b08d03ff | 145 | |
6e2ef85b | 146 | } else if (path_startswith(n->where, m->where)) { |
b08d03ff | 147 | |
6e2ef85b LP |
148 | if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(n), true)) < 0) |
149 | return r; | |
150 | ||
151 | if (m->from_etc_fstab || m->from_fragment) | |
152 | if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0) | |
153 | return r; | |
154 | } | |
155 | } | |
b08d03ff LP |
156 | |
157 | return 0; | |
158 | } | |
159 | ||
6e2ef85b | 160 | static int mount_add_swap_links(Mount *m) { |
ef734fd6 | 161 | Meta *other; |
b08d03ff LP |
162 | int r; |
163 | ||
6e2ef85b | 164 | assert(m); |
b08d03ff | 165 | |
6e2ef85b LP |
166 | LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP]) |
167 | if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0) | |
168 | return r; | |
b08d03ff | 169 | |
6e2ef85b LP |
170 | return 0; |
171 | } | |
b08d03ff | 172 | |
01f78473 LP |
173 | static int mount_add_path_links(Mount *m) { |
174 | Meta *other; | |
175 | int r; | |
176 | ||
177 | assert(m); | |
178 | ||
179 | LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH]) | |
180 | if ((r = path_add_one_mount_link((Path*) other, m)) < 0) | |
181 | return r; | |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
6e2ef85b LP |
186 | static int mount_add_automount_links(Mount *m) { |
187 | Meta *other; | |
188 | int r; | |
e537352b | 189 | |
6e2ef85b | 190 | assert(m); |
b08d03ff | 191 | |
6e2ef85b LP |
192 | LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT]) |
193 | if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0) | |
194 | return r; | |
b08d03ff | 195 | |
6e2ef85b LP |
196 | return 0; |
197 | } | |
b08d03ff | 198 | |
6e2ef85b LP |
199 | static int mount_add_socket_links(Mount *m) { |
200 | Meta *other; | |
201 | int r; | |
b08d03ff | 202 | |
6e2ef85b | 203 | assert(m); |
b08d03ff | 204 | |
6e2ef85b LP |
205 | LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET]) |
206 | if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0) | |
207 | return r; | |
b08d03ff LP |
208 | |
209 | return 0; | |
210 | } | |
211 | ||
07b0b134 | 212 | static char* mount_test_option(const char *haystack, const char *needle) { |
e537352b LP |
213 | struct mntent me; |
214 | ||
215 | assert(needle); | |
216 | ||
217 | /* Like glibc's hasmntopt(), but works on a string, not a | |
218 | * struct mntent */ | |
219 | ||
220 | if (!haystack) | |
221 | return false; | |
222 | ||
223 | zero(me); | |
224 | me.mnt_opts = (char*) haystack; | |
225 | ||
07b0b134 | 226 | return hasmntopt(&me, needle); |
e537352b LP |
227 | } |
228 | ||
229 | static int mount_add_target_links(Mount *m) { | |
230 | const char *target; | |
231 | MountParameters *p; | |
a16e1123 | 232 | Unit *tu; |
e537352b | 233 | int r; |
307e85ef | 234 | bool noauto, handle, automount, user; |
e537352b LP |
235 | |
236 | assert(m); | |
237 | ||
238 | if (m->from_fragment) | |
239 | p = &m->parameters_fragment; | |
240 | else if (m->from_etc_fstab) | |
241 | p = &m->parameters_etc_fstab; | |
242 | else | |
243 | return 0; | |
244 | ||
07b0b134 | 245 | noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO); |
307e85ef | 246 | user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users"); |
07b0b134 ML |
247 | handle = !!mount_test_option(p->options, "comment=systemd.mount"); |
248 | automount = !!mount_test_option(p->options, "comment=systemd.automount"); | |
e537352b | 249 | |
e537352b LP |
250 | if (mount_test_option(p->options, "_netdev") || |
251 | fstype_is_network(p->fstype)) | |
252 | target = SPECIAL_REMOTE_FS_TARGET; | |
253 | else | |
254 | target = SPECIAL_LOCAL_FS_TARGET; | |
255 | ||
398ef8ba | 256 | if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0) |
e537352b LP |
257 | return r; |
258 | ||
a3d4e06d | 259 | if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) { |
a16e1123 LP |
260 | Unit *am; |
261 | ||
262 | if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0) | |
9fcc065a | 263 | return r; |
e537352b | 264 | |
2c966c03 | 265 | return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true); |
a16e1123 LP |
266 | } else { |
267 | ||
4e85aff4 | 268 | if (!noauto && handle) |
a3d4e06d | 269 | if (user || m->meta.manager->running_as == MANAGER_SYSTEM) |
307e85ef LP |
270 | if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0) |
271 | return r; | |
a16e1123 | 272 | |
701cc384 | 273 | return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true); |
a16e1123 | 274 | } |
e537352b LP |
275 | } |
276 | ||
2edd4434 LP |
277 | static int mount_add_default_dependencies(Mount *m) { |
278 | int r; | |
279 | ||
280 | assert(m); | |
281 | ||
75d287d3 LP |
282 | if (m->meta.manager->running_as == MANAGER_SYSTEM && |
283 | !path_equal(m->where, "/")) { | |
2edd4434 | 284 | |
922cc001 | 285 | if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_FSCK_TARGET, NULL, true)) < 0) |
2edd4434 LP |
286 | return r; |
287 | ||
69dd2852 | 288 | if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0) |
75d287d3 | 289 | return r; |
2edd4434 LP |
290 | } |
291 | ||
292 | return 0; | |
293 | } | |
294 | ||
8d567588 LP |
295 | static int mount_verify(Mount *m) { |
296 | bool b; | |
297 | char *e; | |
298 | assert(m); | |
299 | ||
8cbef760 | 300 | if (m->meta.load_state != UNIT_LOADED) |
8d567588 LP |
301 | return 0; |
302 | ||
8cbef760 LP |
303 | if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo) |
304 | return -ENOENT; | |
305 | ||
a16e1123 | 306 | if (!(e = unit_name_from_path(m->where, ".mount"))) |
8d567588 LP |
307 | return -ENOMEM; |
308 | ||
309 | b = unit_has_name(UNIT(m), e); | |
310 | free(e); | |
311 | ||
312 | if (!b) { | |
4cd1fbcc | 313 | log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id); |
8d567588 LP |
314 | return -EINVAL; |
315 | } | |
316 | ||
4e85aff4 | 317 | if (m->meta.fragment_path && !m->parameters_fragment.what) { |
4cd1fbcc | 318 | log_error("%s's What setting is missing. Refusing.", m->meta.id); |
4e85aff4 LP |
319 | return -EBADMSG; |
320 | } | |
321 | ||
2e22afe9 | 322 | if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) { |
4d0e5dbd LP |
323 | log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id); |
324 | return -EINVAL; | |
325 | } | |
326 | ||
8d567588 LP |
327 | return 0; |
328 | } | |
329 | ||
e537352b LP |
330 | static int mount_load(Unit *u) { |
331 | Mount *m = MOUNT(u); | |
332 | int r; | |
333 | ||
334 | assert(u); | |
335 | assert(u->meta.load_state == UNIT_STUB); | |
336 | ||
337 | if ((r = unit_load_fragment_and_dropin_optional(u)) < 0) | |
338 | return r; | |
339 | ||
340 | /* This is a new unit? Then let's add in some extras */ | |
341 | if (u->meta.load_state == UNIT_LOADED) { | |
4e85aff4 | 342 | const char *what = NULL; |
6e2ef85b | 343 | |
4e85aff4 LP |
344 | if (m->meta.fragment_path) |
345 | m->from_fragment = true; | |
e537352b | 346 | |
a16e1123 LP |
347 | if (!m->where) |
348 | if (!(m->where = unit_name_to_path(u->meta.id))) | |
349 | return -ENOMEM; | |
350 | ||
351 | path_kill_slashes(m->where); | |
352 | ||
4e85aff4 LP |
353 | if (!m->meta.description) |
354 | if ((r = unit_set_description(u, m->where)) < 0) | |
355 | return r; | |
e537352b | 356 | |
4e85aff4 LP |
357 | if (m->from_fragment && m->parameters_fragment.what) |
358 | what = m->parameters_fragment.what; | |
359 | else if (m->from_etc_fstab && m->parameters_etc_fstab.what) | |
360 | what = m->parameters_etc_fstab.what; | |
361 | else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what) | |
362 | what = m->parameters_proc_self_mountinfo.what; | |
e537352b | 363 | |
4e85aff4 | 364 | if (what) |
a3d4e06d | 365 | if ((r = unit_add_node_link(u, what, u->meta.manager->running_as == MANAGER_SYSTEM)) < 0) |
4e85aff4 | 366 | return r; |
6e2ef85b LP |
367 | |
368 | if ((r = mount_add_mount_links(m)) < 0) | |
369 | return r; | |
370 | ||
371 | if ((r = mount_add_socket_links(m)) < 0) | |
372 | return r; | |
373 | ||
374 | if ((r = mount_add_swap_links(m)) < 0) | |
e537352b LP |
375 | return r; |
376 | ||
01f78473 LP |
377 | if ((r = mount_add_path_links(m)) < 0) |
378 | return r; | |
379 | ||
6e2ef85b | 380 | if ((r = mount_add_automount_links(m)) < 0) |
e537352b LP |
381 | return r; |
382 | ||
6e2ef85b | 383 | if ((r = mount_add_target_links(m)) < 0) |
e537352b LP |
384 | return r; |
385 | ||
386 | if ((r = unit_add_default_cgroup(u)) < 0) | |
387 | return r; | |
4e67ddd6 | 388 | |
2edd4434 LP |
389 | if (m->meta.default_dependencies) |
390 | if ((r = mount_add_default_dependencies(m)) < 0) | |
4e67ddd6 | 391 | return r; |
e537352b LP |
392 | } |
393 | ||
8d567588 | 394 | return mount_verify(m); |
e537352b LP |
395 | } |
396 | ||
a16e1123 LP |
397 | static int mount_notify_automount(Mount *m, int status) { |
398 | Unit *p; | |
399 | int r; | |
400 | ||
401 | assert(m); | |
402 | ||
403 | if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0) | |
404 | return r == -ENOENT ? 0 : r; | |
405 | ||
406 | return automount_send_ready(AUTOMOUNT(p), status); | |
407 | } | |
408 | ||
e537352b LP |
409 | static void mount_set_state(Mount *m, MountState state) { |
410 | MountState old_state; | |
411 | assert(m); | |
412 | ||
413 | old_state = m->state; | |
414 | m->state = state; | |
415 | ||
416 | if (state != MOUNT_MOUNTING && | |
417 | state != MOUNT_MOUNTING_DONE && | |
418 | state != MOUNT_REMOUNTING && | |
419 | state != MOUNT_UNMOUNTING && | |
420 | state != MOUNT_MOUNTING_SIGTERM && | |
421 | state != MOUNT_MOUNTING_SIGKILL && | |
422 | state != MOUNT_UNMOUNTING_SIGTERM && | |
423 | state != MOUNT_UNMOUNTING_SIGKILL && | |
424 | state != MOUNT_REMOUNTING_SIGTERM && | |
425 | state != MOUNT_REMOUNTING_SIGKILL) { | |
426 | unit_unwatch_timer(UNIT(m), &m->timer_watch); | |
a16e1123 | 427 | mount_unwatch_control_pid(m); |
e537352b | 428 | m->control_command = NULL; |
a16e1123 | 429 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; |
e537352b LP |
430 | } |
431 | ||
8d567588 LP |
432 | if (state == MOUNT_MOUNTED || |
433 | state == MOUNT_REMOUNTING) | |
434 | mount_notify_automount(m, 0); | |
435 | else if (state == MOUNT_DEAD || | |
436 | state == MOUNT_UNMOUNTING || | |
437 | state == MOUNT_MOUNTING_SIGTERM || | |
438 | state == MOUNT_MOUNTING_SIGKILL || | |
439 | state == MOUNT_REMOUNTING_SIGTERM || | |
440 | state == MOUNT_REMOUNTING_SIGKILL || | |
441 | state == MOUNT_UNMOUNTING_SIGTERM || | |
442 | state == MOUNT_UNMOUNTING_SIGKILL || | |
18c78fb1 | 443 | state == MOUNT_MAINTENANCE) |
8d567588 LP |
444 | mount_notify_automount(m, -ENODEV); |
445 | ||
e537352b | 446 | if (state != old_state) |
40d50879 | 447 | log_debug("%s changed %s -> %s", |
4cd1fbcc | 448 | m->meta.id, |
a16e1123 LP |
449 | mount_state_to_string(old_state), |
450 | mount_state_to_string(state)); | |
e537352b LP |
451 | |
452 | unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]); | |
453 | } | |
454 | ||
455 | static int mount_coldplug(Unit *u) { | |
456 | Mount *m = MOUNT(u); | |
a16e1123 LP |
457 | MountState new_state = MOUNT_DEAD; |
458 | int r; | |
e537352b LP |
459 | |
460 | assert(m); | |
461 | assert(m->state == MOUNT_DEAD); | |
462 | ||
a16e1123 LP |
463 | if (m->deserialized_state != m->state) |
464 | new_state = m->deserialized_state; | |
465 | else if (m->from_proc_self_mountinfo) | |
466 | new_state = MOUNT_MOUNTED; | |
e537352b | 467 | |
a16e1123 | 468 | if (new_state != m->state) { |
e537352b | 469 | |
a16e1123 LP |
470 | if (new_state == MOUNT_MOUNTING || |
471 | new_state == MOUNT_MOUNTING_DONE || | |
472 | new_state == MOUNT_REMOUNTING || | |
473 | new_state == MOUNT_UNMOUNTING || | |
474 | new_state == MOUNT_MOUNTING_SIGTERM || | |
475 | new_state == MOUNT_MOUNTING_SIGKILL || | |
476 | new_state == MOUNT_UNMOUNTING_SIGTERM || | |
477 | new_state == MOUNT_UNMOUNTING_SIGKILL || | |
478 | new_state == MOUNT_REMOUNTING_SIGTERM || | |
479 | new_state == MOUNT_REMOUNTING_SIGKILL) { | |
e537352b | 480 | |
a16e1123 LP |
481 | if (m->control_pid <= 0) |
482 | return -EBADMSG; | |
e537352b | 483 | |
a16e1123 LP |
484 | if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0) |
485 | return r; | |
e537352b | 486 | |
a16e1123 LP |
487 | if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0) |
488 | return r; | |
489 | } | |
e537352b | 490 | |
a16e1123 LP |
491 | mount_set_state(m, new_state); |
492 | } | |
e537352b LP |
493 | |
494 | return 0; | |
e537352b LP |
495 | } |
496 | ||
497 | static void mount_dump(Unit *u, FILE *f, const char *prefix) { | |
498 | Mount *m = MOUNT(u); | |
499 | MountParameters *p; | |
500 | ||
501 | assert(m); | |
502 | assert(f); | |
503 | ||
504 | if (m->from_proc_self_mountinfo) | |
505 | p = &m->parameters_proc_self_mountinfo; | |
506 | else if (m->from_fragment) | |
507 | p = &m->parameters_fragment; | |
508 | else | |
509 | p = &m->parameters_etc_fstab; | |
510 | ||
511 | fprintf(f, | |
512 | "%sMount State: %s\n" | |
513 | "%sWhere: %s\n" | |
514 | "%sWhat: %s\n" | |
515 | "%sFile System Type: %s\n" | |
516 | "%sOptions: %s\n" | |
517 | "%sFrom /etc/fstab: %s\n" | |
518 | "%sFrom /proc/self/mountinfo: %s\n" | |
519 | "%sFrom fragment: %s\n" | |
3e5235b0 | 520 | "%sDirectoryMode: %04o\n", |
a16e1123 | 521 | prefix, mount_state_to_string(m->state), |
e537352b LP |
522 | prefix, m->where, |
523 | prefix, strna(p->what), | |
524 | prefix, strna(p->fstype), | |
525 | prefix, strna(p->options), | |
526 | prefix, yes_no(m->from_etc_fstab), | |
527 | prefix, yes_no(m->from_proc_self_mountinfo), | |
528 | prefix, yes_no(m->from_fragment), | |
3e5235b0 | 529 | prefix, m->directory_mode); |
e537352b LP |
530 | |
531 | if (m->control_pid > 0) | |
532 | fprintf(f, | |
bb00e604 LP |
533 | "%sControl PID: %lu\n", |
534 | prefix, (unsigned long) m->control_pid); | |
e537352b LP |
535 | |
536 | exec_context_dump(&m->exec_context, f, prefix); | |
537 | } | |
538 | ||
a16e1123 LP |
539 | static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) { |
540 | pid_t pid; | |
541 | int r; | |
542 | ||
543 | assert(m); | |
544 | assert(c); | |
545 | assert(_pid); | |
546 | ||
547 | if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0) | |
548 | goto fail; | |
549 | ||
550 | if ((r = exec_spawn(c, | |
551 | NULL, | |
552 | &m->exec_context, | |
553 | NULL, 0, | |
1137a57c | 554 | m->meta.manager->environment, |
a16e1123 LP |
555 | true, |
556 | true, | |
1e3ad081 | 557 | true, |
c3686083 | 558 | m->meta.manager->confirm_spawn, |
4cd1fbcc | 559 | m->meta.cgroup_bondings, |
a16e1123 LP |
560 | &pid)) < 0) |
561 | goto fail; | |
562 | ||
563 | if ((r = unit_watch_pid(UNIT(m), pid)) < 0) | |
564 | /* FIXME: we need to do something here */ | |
565 | goto fail; | |
566 | ||
567 | *_pid = pid; | |
568 | ||
569 | return 0; | |
570 | ||
571 | fail: | |
572 | unit_unwatch_timer(UNIT(m), &m->timer_watch); | |
573 | ||
574 | return r; | |
575 | } | |
576 | ||
e537352b LP |
577 | static void mount_enter_dead(Mount *m, bool success) { |
578 | assert(m); | |
579 | ||
580 | if (!success) | |
581 | m->failure = true; | |
582 | ||
18c78fb1 | 583 | mount_set_state(m, m->failure ? MOUNT_MAINTENANCE : MOUNT_DEAD); |
e537352b LP |
584 | } |
585 | ||
80876c20 LP |
586 | static void mount_enter_mounted(Mount *m, bool success) { |
587 | assert(m); | |
588 | ||
589 | if (!success) | |
590 | m->failure = true; | |
591 | ||
592 | mount_set_state(m, MOUNT_MOUNTED); | |
593 | } | |
594 | ||
e537352b LP |
595 | static void mount_enter_signal(Mount *m, MountState state, bool success) { |
596 | int r; | |
80876c20 | 597 | bool sent = false; |
e537352b LP |
598 | |
599 | assert(m); | |
600 | ||
601 | if (!success) | |
602 | m->failure = true; | |
603 | ||
2e22afe9 | 604 | if (m->exec_context.kill_mode != KILL_NONE) { |
80876c20 LP |
605 | int sig = (state == MOUNT_MOUNTING_SIGTERM || |
606 | state == MOUNT_UNMOUNTING_SIGTERM || | |
2e22afe9 | 607 | state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL; |
e537352b | 608 | |
2e22afe9 | 609 | if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) { |
e537352b | 610 | |
4cd1fbcc | 611 | if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig)) < 0) { |
e537352b LP |
612 | if (r != -EAGAIN && r != -ESRCH) |
613 | goto fail; | |
614 | } else | |
615 | sent = true; | |
616 | } | |
617 | ||
80876c20 | 618 | if (!sent && m->control_pid > 0) |
2e22afe9 LP |
619 | if (kill(m->exec_context.kill_mode == KILL_PROCESS ? |
620 | m->control_pid : | |
621 | -m->control_pid, sig) < 0 && errno != ESRCH) { | |
622 | ||
e537352b LP |
623 | r = -errno; |
624 | goto fail; | |
625 | } | |
626 | } | |
627 | ||
80876c20 LP |
628 | if (sent) { |
629 | if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0) | |
630 | goto fail; | |
e537352b | 631 | |
80876c20 LP |
632 | mount_set_state(m, state); |
633 | } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL) | |
634 | mount_enter_mounted(m, true); | |
635 | else | |
e537352b LP |
636 | mount_enter_dead(m, true); |
637 | ||
638 | return; | |
639 | ||
640 | fail: | |
4cd1fbcc | 641 | log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r)); |
e537352b | 642 | |
80876c20 LP |
643 | if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL) |
644 | mount_enter_mounted(m, false); | |
645 | else | |
646 | mount_enter_dead(m, false); | |
e537352b LP |
647 | } |
648 | ||
649 | static void mount_enter_unmounting(Mount *m, bool success) { | |
e537352b LP |
650 | int r; |
651 | ||
652 | assert(m); | |
653 | ||
654 | if (!success) | |
655 | m->failure = true; | |
656 | ||
a16e1123 LP |
657 | m->control_command_id = MOUNT_EXEC_UNMOUNT; |
658 | m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT; | |
e537352b LP |
659 | |
660 | if ((r = exec_command_set( | |
a16e1123 | 661 | m->control_command, |
e537352b LP |
662 | "/bin/umount", |
663 | m->where, | |
664 | NULL)) < 0) | |
665 | goto fail; | |
666 | ||
a16e1123 | 667 | mount_unwatch_control_pid(m); |
5e94833f | 668 | |
a16e1123 | 669 | if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0) |
e537352b LP |
670 | goto fail; |
671 | ||
672 | mount_set_state(m, MOUNT_UNMOUNTING); | |
673 | ||
674 | return; | |
675 | ||
676 | fail: | |
4cd1fbcc | 677 | log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r)); |
e537352b LP |
678 | mount_enter_mounted(m, false); |
679 | } | |
680 | ||
8d567588 | 681 | static void mount_enter_mounting(Mount *m) { |
e537352b LP |
682 | int r; |
683 | ||
684 | assert(m); | |
685 | ||
a16e1123 LP |
686 | m->control_command_id = MOUNT_EXEC_MOUNT; |
687 | m->control_command = m->exec_command + MOUNT_EXEC_MOUNT; | |
e537352b | 688 | |
3e5235b0 LP |
689 | mkdir_p(m->where, m->directory_mode); |
690 | ||
e537352b LP |
691 | if (m->from_fragment) |
692 | r = exec_command_set( | |
a16e1123 | 693 | m->control_command, |
e537352b LP |
694 | "/bin/mount", |
695 | m->parameters_fragment.what, | |
696 | m->where, | |
697 | "-t", m->parameters_fragment.fstype, | |
8d567588 | 698 | m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options, |
e537352b LP |
699 | NULL); |
700 | else if (m->from_etc_fstab) | |
701 | r = exec_command_set( | |
a16e1123 | 702 | m->control_command, |
e537352b LP |
703 | "/bin/mount", |
704 | m->where, | |
705 | NULL); | |
706 | else | |
707 | r = -ENOENT; | |
708 | ||
709 | if (r < 0) | |
710 | goto fail; | |
711 | ||
a16e1123 | 712 | mount_unwatch_control_pid(m); |
5e94833f | 713 | |
a16e1123 | 714 | if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0) |
e537352b LP |
715 | goto fail; |
716 | ||
717 | mount_set_state(m, MOUNT_MOUNTING); | |
718 | ||
719 | return; | |
720 | ||
721 | fail: | |
4cd1fbcc | 722 | log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r)); |
e537352b LP |
723 | mount_enter_dead(m, false); |
724 | } | |
725 | ||
8d567588 | 726 | static void mount_enter_mounting_done(Mount *m) { |
e537352b LP |
727 | assert(m); |
728 | ||
e537352b LP |
729 | mount_set_state(m, MOUNT_MOUNTING_DONE); |
730 | } | |
731 | ||
732 | static void mount_enter_remounting(Mount *m, bool success) { | |
e537352b LP |
733 | int r; |
734 | ||
735 | assert(m); | |
736 | ||
737 | if (!success) | |
738 | m->failure = true; | |
739 | ||
a16e1123 LP |
740 | m->control_command_id = MOUNT_EXEC_REMOUNT; |
741 | m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT; | |
e537352b LP |
742 | |
743 | if (m->from_fragment) { | |
744 | char *buf = NULL; | |
745 | const char *o; | |
746 | ||
747 | if (m->parameters_fragment.options) { | |
748 | if (!(buf = strappend("remount,", m->parameters_fragment.options))) { | |
749 | r = -ENOMEM; | |
750 | goto fail; | |
751 | } | |
752 | ||
753 | o = buf; | |
754 | } else | |
755 | o = "remount"; | |
756 | ||
757 | r = exec_command_set( | |
a16e1123 | 758 | m->control_command, |
e537352b LP |
759 | "/bin/mount", |
760 | m->parameters_fragment.what, | |
761 | m->where, | |
762 | "-t", m->parameters_fragment.fstype, | |
763 | "-o", o, | |
764 | NULL); | |
765 | ||
766 | free(buf); | |
767 | } else if (m->from_etc_fstab) | |
768 | r = exec_command_set( | |
a16e1123 | 769 | m->control_command, |
e537352b LP |
770 | "/bin/mount", |
771 | m->where, | |
772 | "-o", "remount", | |
773 | NULL); | |
774 | else | |
775 | r = -ENOENT; | |
776 | ||
777 | if (r < 0) { | |
778 | r = -ENOMEM; | |
779 | goto fail; | |
780 | } | |
781 | ||
a16e1123 | 782 | mount_unwatch_control_pid(m); |
5e94833f | 783 | |
a16e1123 | 784 | if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0) |
e537352b LP |
785 | goto fail; |
786 | ||
787 | mount_set_state(m, MOUNT_REMOUNTING); | |
788 | ||
789 | return; | |
790 | ||
791 | fail: | |
e364ad06 | 792 | log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r)); |
e537352b LP |
793 | mount_enter_mounted(m, false); |
794 | } | |
795 | ||
796 | static int mount_start(Unit *u) { | |
797 | Mount *m = MOUNT(u); | |
798 | ||
799 | assert(m); | |
800 | ||
801 | /* We cannot fulfill this request right now, try again later | |
802 | * please! */ | |
803 | if (m->state == MOUNT_UNMOUNTING || | |
804 | m->state == MOUNT_UNMOUNTING_SIGTERM || | |
805 | m->state == MOUNT_UNMOUNTING_SIGKILL) | |
806 | return -EAGAIN; | |
807 | ||
808 | /* Already on it! */ | |
809 | if (m->state == MOUNT_MOUNTING || | |
810 | m->state == MOUNT_MOUNTING_SIGTERM || | |
811 | m->state == MOUNT_MOUNTING_SIGKILL) | |
812 | return 0; | |
813 | ||
18c78fb1 | 814 | assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTENANCE); |
e537352b LP |
815 | |
816 | m->failure = false; | |
8d567588 | 817 | mount_enter_mounting(m); |
e537352b LP |
818 | return 0; |
819 | } | |
820 | ||
821 | static int mount_stop(Unit *u) { | |
822 | Mount *m = MOUNT(u); | |
823 | ||
824 | assert(m); | |
825 | ||
e537352b LP |
826 | /* Already on it */ |
827 | if (m->state == MOUNT_UNMOUNTING || | |
828 | m->state == MOUNT_UNMOUNTING_SIGKILL || | |
829 | m->state == MOUNT_UNMOUNTING_SIGTERM) | |
830 | return 0; | |
831 | ||
3f6c78dc LP |
832 | assert(m->state == MOUNT_MOUNTING || |
833 | m->state == MOUNT_MOUNTING_DONE || | |
834 | m->state == MOUNT_MOUNTED || | |
835 | m->state == MOUNT_MOUNTING_SIGTERM || | |
836 | m->state == MOUNT_MOUNTING_SIGKILL || | |
837 | m->state == MOUNT_REMOUNTING || | |
838 | m->state == MOUNT_REMOUNTING_SIGTERM || | |
839 | m->state == MOUNT_REMOUNTING_SIGKILL); | |
e537352b LP |
840 | |
841 | mount_enter_unmounting(m, true); | |
842 | return 0; | |
843 | } | |
844 | ||
845 | static int mount_reload(Unit *u) { | |
846 | Mount *m = MOUNT(u); | |
847 | ||
848 | assert(m); | |
849 | ||
850 | if (m->state == MOUNT_MOUNTING_DONE) | |
851 | return -EAGAIN; | |
852 | ||
853 | assert(m->state == MOUNT_MOUNTED); | |
854 | ||
855 | mount_enter_remounting(m, true); | |
856 | return 0; | |
857 | } | |
858 | ||
a16e1123 LP |
859 | static int mount_serialize(Unit *u, FILE *f, FDSet *fds) { |
860 | Mount *m = MOUNT(u); | |
861 | ||
862 | assert(m); | |
863 | assert(f); | |
864 | assert(fds); | |
865 | ||
866 | unit_serialize_item(u, f, "state", mount_state_to_string(m->state)); | |
867 | unit_serialize_item(u, f, "failure", yes_no(m->failure)); | |
868 | ||
869 | if (m->control_pid > 0) | |
5925dd3c | 870 | unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid); |
a16e1123 LP |
871 | |
872 | if (m->control_command_id >= 0) | |
873 | unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id)); | |
874 | ||
875 | return 0; | |
876 | } | |
877 | ||
878 | static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
879 | Mount *m = MOUNT(u); | |
a16e1123 LP |
880 | |
881 | assert(u); | |
882 | assert(key); | |
883 | assert(value); | |
884 | assert(fds); | |
885 | ||
886 | if (streq(key, "state")) { | |
887 | MountState state; | |
888 | ||
889 | if ((state = mount_state_from_string(value)) < 0) | |
890 | log_debug("Failed to parse state value %s", value); | |
891 | else | |
892 | m->deserialized_state = state; | |
893 | } else if (streq(key, "failure")) { | |
894 | int b; | |
895 | ||
896 | if ((b = parse_boolean(value)) < 0) | |
897 | log_debug("Failed to parse failure value %s", value); | |
898 | else | |
899 | m->failure = b || m->failure; | |
900 | ||
901 | } else if (streq(key, "control-pid")) { | |
5925dd3c | 902 | pid_t pid; |
a16e1123 | 903 | |
e364ad06 | 904 | if (parse_pid(value, &pid) < 0) |
a16e1123 LP |
905 | log_debug("Failed to parse control-pid value %s", value); |
906 | else | |
5925dd3c | 907 | m->control_pid = pid; |
a16e1123 LP |
908 | } else if (streq(key, "control-command")) { |
909 | MountExecCommand id; | |
910 | ||
911 | if ((id = mount_exec_command_from_string(value)) < 0) | |
912 | log_debug("Failed to parse exec-command value %s", value); | |
913 | else { | |
914 | m->control_command_id = id; | |
915 | m->control_command = m->exec_command + id; | |
916 | } | |
917 | ||
918 | } else | |
919 | log_debug("Unknown serialization key '%s'", key); | |
920 | ||
921 | return 0; | |
922 | } | |
923 | ||
e537352b LP |
924 | static UnitActiveState mount_active_state(Unit *u) { |
925 | assert(u); | |
926 | ||
927 | return state_translation_table[MOUNT(u)->state]; | |
928 | } | |
929 | ||
10a94420 LP |
930 | static const char *mount_sub_state_to_string(Unit *u) { |
931 | assert(u); | |
932 | ||
a16e1123 | 933 | return mount_state_to_string(MOUNT(u)->state); |
10a94420 LP |
934 | } |
935 | ||
701cc384 LP |
936 | static bool mount_check_gc(Unit *u) { |
937 | Mount *m = MOUNT(u); | |
938 | ||
939 | assert(m); | |
940 | ||
941 | return m->from_etc_fstab || m->from_proc_self_mountinfo; | |
942 | } | |
943 | ||
e537352b LP |
944 | static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
945 | Mount *m = MOUNT(u); | |
946 | bool success; | |
947 | ||
948 | assert(m); | |
949 | assert(pid >= 0); | |
950 | ||
8c47c732 LP |
951 | if (pid != m->control_pid) |
952 | return; | |
e537352b | 953 | |
e537352b LP |
954 | m->control_pid = 0; |
955 | ||
8c47c732 LP |
956 | success = is_clean_exit(code, status); |
957 | m->failure = m->failure || !success; | |
958 | ||
a16e1123 | 959 | if (m->control_command) { |
b58b4116 | 960 | exec_status_exit(&m->control_command->exec_status, pid, code, status); |
a16e1123 LP |
961 | m->control_command = NULL; |
962 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
963 | } | |
964 | ||
92abbefb LP |
965 | log_full(success ? LOG_DEBUG : LOG_NOTICE, |
966 | "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status); | |
e537352b LP |
967 | |
968 | /* Note that mount(8) returning and the kernel sending us a | |
969 | * mount table change event might happen out-of-order. If an | |
970 | * operation succeed we assume the kernel will follow soon too | |
971 | * and already change into the resulting state. If it fails | |
972 | * we check if the kernel still knows about the mount. and | |
973 | * change state accordingly. */ | |
974 | ||
975 | switch (m->state) { | |
976 | ||
977 | case MOUNT_MOUNTING: | |
978 | case MOUNT_MOUNTING_DONE: | |
979 | case MOUNT_MOUNTING_SIGKILL: | |
980 | case MOUNT_MOUNTING_SIGTERM: | |
981 | case MOUNT_REMOUNTING: | |
982 | case MOUNT_REMOUNTING_SIGKILL: | |
983 | case MOUNT_REMOUNTING_SIGTERM: | |
984 | ||
19b160fa | 985 | if (success) |
e537352b LP |
986 | mount_enter_mounted(m, true); |
987 | else if (m->from_proc_self_mountinfo) | |
988 | mount_enter_mounted(m, false); | |
989 | else | |
990 | mount_enter_dead(m, false); | |
991 | break; | |
992 | ||
993 | case MOUNT_UNMOUNTING: | |
994 | case MOUNT_UNMOUNTING_SIGKILL: | |
995 | case MOUNT_UNMOUNTING_SIGTERM: | |
996 | ||
997 | if (success) | |
998 | mount_enter_dead(m, true); | |
999 | else if (m->from_proc_self_mountinfo) | |
1000 | mount_enter_mounted(m, false); | |
1001 | else | |
1002 | mount_enter_dead(m, false); | |
1003 | break; | |
1004 | ||
1005 | default: | |
1006 | assert_not_reached("Uh, control process died at wrong time."); | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) { | |
1011 | Mount *m = MOUNT(u); | |
1012 | ||
1013 | assert(m); | |
1014 | assert(elapsed == 1); | |
1015 | assert(w == &m->timer_watch); | |
1016 | ||
1017 | switch (m->state) { | |
1018 | ||
1019 | case MOUNT_MOUNTING: | |
1020 | case MOUNT_MOUNTING_DONE: | |
9e2f7c11 | 1021 | log_warning("%s mounting timed out. Stopping.", u->meta.id); |
e537352b LP |
1022 | mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false); |
1023 | break; | |
1024 | ||
1025 | case MOUNT_REMOUNTING: | |
9e2f7c11 | 1026 | log_warning("%s remounting timed out. Stopping.", u->meta.id); |
e537352b LP |
1027 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false); |
1028 | break; | |
1029 | ||
1030 | case MOUNT_UNMOUNTING: | |
9e2f7c11 | 1031 | log_warning("%s unmounting timed out. Stopping.", u->meta.id); |
e537352b LP |
1032 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false); |
1033 | break; | |
1034 | ||
1035 | case MOUNT_MOUNTING_SIGTERM: | |
9e2f7c11 | 1036 | log_warning("%s mounting timed out. Killing.", u->meta.id); |
e537352b LP |
1037 | mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false); |
1038 | break; | |
1039 | ||
1040 | case MOUNT_REMOUNTING_SIGTERM: | |
9e2f7c11 | 1041 | log_warning("%s remounting timed out. Killing.", u->meta.id); |
e537352b LP |
1042 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false); |
1043 | break; | |
1044 | ||
1045 | case MOUNT_UNMOUNTING_SIGTERM: | |
9e2f7c11 | 1046 | log_warning("%s unmounting timed out. Killing.", u->meta.id); |
e537352b LP |
1047 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false); |
1048 | break; | |
1049 | ||
1050 | case MOUNT_MOUNTING_SIGKILL: | |
1051 | case MOUNT_REMOUNTING_SIGKILL: | |
1052 | case MOUNT_UNMOUNTING_SIGKILL: | |
9e2f7c11 | 1053 | log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id); |
e537352b LP |
1054 | |
1055 | if (m->from_proc_self_mountinfo) | |
1056 | mount_enter_mounted(m, false); | |
1057 | else | |
1058 | mount_enter_dead(m, false); | |
1059 | break; | |
1060 | ||
1061 | default: | |
1062 | assert_not_reached("Timeout at wrong time."); | |
1063 | } | |
1064 | } | |
1065 | ||
1066 | static int mount_add_one( | |
1067 | Manager *m, | |
1068 | const char *what, | |
1069 | const char *where, | |
1070 | const char *options, | |
1071 | const char *fstype, | |
1072 | bool from_proc_self_mountinfo, | |
1073 | bool set_flags) { | |
b08d03ff LP |
1074 | int r; |
1075 | Unit *u; | |
1076 | bool delete; | |
e537352b | 1077 | char *e, *w = NULL, *o = NULL, *f = NULL; |
4e85aff4 | 1078 | MountParameters *p; |
b08d03ff | 1079 | |
f50e0a01 | 1080 | assert(m); |
b08d03ff LP |
1081 | assert(what); |
1082 | assert(where); | |
e537352b LP |
1083 | assert(options); |
1084 | assert(fstype); | |
1085 | ||
1086 | assert(!set_flags || from_proc_self_mountinfo); | |
1087 | ||
1088 | /* Ignore API mount points. They should never be referenced in | |
1089 | * dependencies ever. */ | |
1090 | if (mount_point_is_api(where)) | |
1091 | return 0; | |
b08d03ff | 1092 | |
8d567588 LP |
1093 | if (streq(fstype, "autofs")) |
1094 | return 0; | |
1095 | ||
4e85aff4 LP |
1096 | /* probably some kind of swap, ignore */ |
1097 | if (!is_path(where)) | |
b08d03ff LP |
1098 | return 0; |
1099 | ||
a16e1123 | 1100 | if (!(e = unit_name_from_path(where, ".mount"))) |
b08d03ff LP |
1101 | return -ENOMEM; |
1102 | ||
1103 | if (!(u = manager_get_unit(m, e))) { | |
1104 | delete = true; | |
1105 | ||
1106 | if (!(u = unit_new(m))) { | |
1107 | free(e); | |
1108 | return -ENOMEM; | |
1109 | } | |
1110 | ||
1111 | r = unit_add_name(u, e); | |
1112 | free(e); | |
1113 | ||
1114 | if (r < 0) | |
1115 | goto fail; | |
1116 | ||
e537352b | 1117 | if (!(MOUNT(u)->where = strdup(where))) { |
07b0b134 ML |
1118 | r = -ENOMEM; |
1119 | goto fail; | |
1120 | } | |
f50e0a01 | 1121 | |
f94ea366 | 1122 | unit_add_to_load_queue(u); |
b08d03ff LP |
1123 | } else { |
1124 | delete = false; | |
1125 | free(e); | |
1126 | } | |
1127 | ||
e537352b LP |
1128 | if (!(w = strdup(what)) || |
1129 | !(o = strdup(options)) || | |
1130 | !(f = strdup(fstype))) { | |
1131 | r = -ENOMEM; | |
1132 | goto fail; | |
1133 | } | |
1134 | ||
1135 | if (from_proc_self_mountinfo) { | |
4e85aff4 | 1136 | p = &MOUNT(u)->parameters_proc_self_mountinfo; |
e537352b LP |
1137 | |
1138 | if (set_flags) { | |
1139 | MOUNT(u)->is_mounted = true; | |
1140 | MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo; | |
4e85aff4 | 1141 | MOUNT(u)->just_changed = !streq_ptr(p->options, o); |
e537352b | 1142 | } |
ef734fd6 | 1143 | |
f50e0a01 | 1144 | MOUNT(u)->from_proc_self_mountinfo = true; |
ef734fd6 | 1145 | } else { |
4e85aff4 | 1146 | p = &MOUNT(u)->parameters_etc_fstab; |
f50e0a01 | 1147 | MOUNT(u)->from_etc_fstab = true; |
ef734fd6 | 1148 | } |
f50e0a01 | 1149 | |
4e85aff4 LP |
1150 | free(p->what); |
1151 | p->what = w; | |
b08d03ff | 1152 | |
4e85aff4 LP |
1153 | free(p->options); |
1154 | p->options = o; | |
e537352b | 1155 | |
4e85aff4 LP |
1156 | free(p->fstype); |
1157 | p->fstype = f; | |
b08d03ff | 1158 | |
c1e1601e LP |
1159 | unit_add_to_dbus_queue(u); |
1160 | ||
b08d03ff LP |
1161 | return 0; |
1162 | ||
1163 | fail: | |
e537352b LP |
1164 | free(w); |
1165 | free(o); | |
1166 | free(f); | |
1167 | ||
b08d03ff LP |
1168 | if (delete && u) |
1169 | unit_free(u); | |
1170 | ||
4e85aff4 | 1171 | return r; |
b08d03ff LP |
1172 | } |
1173 | ||
1174 | static char *fstab_node_to_udev_node(char *p) { | |
1175 | char *dn, *t; | |
1176 | int r; | |
1177 | ||
1178 | /* FIXME: to follow udev's logic 100% we need to leave valid | |
1179 | * UTF8 chars unescaped */ | |
1180 | ||
1181 | if (startswith(p, "LABEL=")) { | |
1182 | ||
f50e0a01 | 1183 | if (!(t = xescape(p+6, "/ "))) |
b08d03ff LP |
1184 | return NULL; |
1185 | ||
f50e0a01 | 1186 | r = asprintf(&dn, "/dev/disk/by-label/%s", t); |
b08d03ff LP |
1187 | free(t); |
1188 | ||
1189 | if (r < 0) | |
1190 | return NULL; | |
1191 | ||
1192 | return dn; | |
1193 | } | |
1194 | ||
1195 | if (startswith(p, "UUID=")) { | |
1196 | ||
f50e0a01 | 1197 | if (!(t = xescape(p+5, "/ "))) |
b08d03ff LP |
1198 | return NULL; |
1199 | ||
f50e0a01 | 1200 | r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t)); |
b08d03ff LP |
1201 | free(t); |
1202 | ||
1203 | if (r < 0) | |
1204 | return NULL; | |
1205 | ||
1206 | return dn; | |
1207 | } | |
1208 | ||
1209 | return strdup(p); | |
1210 | } | |
1211 | ||
07b0b134 ML |
1212 | static int mount_find_pri(char *options) { |
1213 | char *end, *pri; | |
1214 | unsigned long r; | |
1215 | ||
1216 | if (!(pri = mount_test_option(options, "pri="))) | |
1217 | return 0; | |
1218 | ||
1219 | pri += 4; | |
1220 | ||
1221 | errno = 0; | |
1222 | r = strtoul(pri, &end, 10); | |
1223 | ||
1224 | if (errno != 0) | |
1225 | return -errno; | |
1226 | ||
1227 | if (end == pri || (*end != ',' && *end != 0)) | |
1228 | return -EINVAL; | |
1229 | ||
1230 | return (int) r; | |
1231 | } | |
1232 | ||
e537352b | 1233 | static int mount_load_etc_fstab(Manager *m) { |
b08d03ff LP |
1234 | FILE *f; |
1235 | int r; | |
1236 | struct mntent* me; | |
1237 | ||
1238 | assert(m); | |
1239 | ||
1240 | errno = 0; | |
1241 | if (!(f = setmntent("/etc/fstab", "r"))) | |
1242 | return -errno; | |
1243 | ||
1244 | while ((me = getmntent(f))) { | |
1245 | char *where, *what; | |
1246 | ||
1247 | if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) { | |
1248 | r = -ENOMEM; | |
1249 | goto finish; | |
1250 | } | |
1251 | ||
1252 | if (!(where = strdup(me->mnt_dir))) { | |
1253 | free(what); | |
1254 | r = -ENOMEM; | |
1255 | goto finish; | |
1256 | } | |
1257 | ||
1258 | if (what[0] == '/') | |
1259 | path_kill_slashes(what); | |
1260 | ||
1261 | if (where[0] == '/') | |
1262 | path_kill_slashes(where); | |
1263 | ||
07b0b134 ML |
1264 | if (streq(me->mnt_type, "swap")) { |
1265 | int pri; | |
1266 | ||
1267 | if ((pri = mount_find_pri(me->mnt_opts)) < 0) | |
1268 | r = pri; | |
1269 | else | |
1270 | r = swap_add_one(m, | |
1271 | what, | |
07b0b134 | 1272 | pri, |
4e85aff4 LP |
1273 | !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO), |
1274 | !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"), | |
07b0b134 ML |
1275 | false); |
1276 | } else | |
1277 | r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false); | |
1278 | ||
b08d03ff LP |
1279 | free(what); |
1280 | free(where); | |
1281 | ||
1282 | if (r < 0) | |
1283 | goto finish; | |
1284 | } | |
1285 | ||
1286 | r = 0; | |
1287 | finish: | |
1288 | ||
1289 | endmntent(f); | |
1290 | return r; | |
1291 | } | |
1292 | ||
ef734fd6 | 1293 | static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { |
b08d03ff | 1294 | int r; |
a2e0f3d3 | 1295 | char *device, *path, *options, *options2, *fstype, *d, *p, *o; |
b08d03ff LP |
1296 | |
1297 | assert(m); | |
1298 | ||
ef734fd6 | 1299 | rewind(m->proc_self_mountinfo); |
b08d03ff LP |
1300 | |
1301 | for (;;) { | |
1302 | int k; | |
e537352b | 1303 | |
a2e0f3d3 | 1304 | device = path = options = options2 = fstype = d = p = o = NULL; |
b08d03ff | 1305 | |
ef734fd6 | 1306 | if ((k = fscanf(m->proc_self_mountinfo, |
b08d03ff LP |
1307 | "%*s " /* (1) mount id */ |
1308 | "%*s " /* (2) parent id */ | |
1309 | "%*s " /* (3) major:minor */ | |
1310 | "%*s " /* (4) root */ | |
1311 | "%ms " /* (5) mount point */ | |
e537352b | 1312 | "%ms" /* (6) mount options */ |
b08d03ff LP |
1313 | "%*[^-]" /* (7) optional fields */ |
1314 | "- " /* (8) seperator */ | |
e537352b | 1315 | "%ms " /* (9) file system type */ |
ef734fd6 | 1316 | "%ms" /* (10) mount source */ |
a2e0f3d3 | 1317 | "%ms" /* (11) mount options 2 */ |
ef734fd6 | 1318 | "%*[^\n]", /* some rubbish at the end */ |
b08d03ff | 1319 | &path, |
e537352b LP |
1320 | &options, |
1321 | &fstype, | |
a2e0f3d3 LP |
1322 | &device, |
1323 | &options2)) != 5) { | |
b08d03ff | 1324 | |
ef734fd6 LP |
1325 | if (k == EOF) |
1326 | break; | |
b08d03ff | 1327 | |
e537352b LP |
1328 | r = -EBADMSG; |
1329 | goto finish; | |
b08d03ff LP |
1330 | } |
1331 | ||
a2e0f3d3 LP |
1332 | if (asprintf(&o, "%s,%s", options, options2) < 0) { |
1333 | r = -ENOMEM; | |
1334 | goto finish; | |
1335 | } | |
1336 | ||
e537352b LP |
1337 | if (!(d = cunescape(device)) || |
1338 | !(p = cunescape(path))) { | |
1339 | r = -ENOMEM; | |
1340 | goto finish; | |
b08d03ff | 1341 | } |
b08d03ff | 1342 | |
a2e0f3d3 | 1343 | if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0) |
e537352b | 1344 | goto finish; |
b08d03ff | 1345 | |
e537352b LP |
1346 | free(device); |
1347 | free(path); | |
1348 | free(options); | |
a2e0f3d3 | 1349 | free(options2); |
e537352b | 1350 | free(fstype); |
b08d03ff LP |
1351 | free(d); |
1352 | free(p); | |
a2e0f3d3 | 1353 | free(o); |
b08d03ff LP |
1354 | } |
1355 | ||
e537352b LP |
1356 | r = 0; |
1357 | ||
1358 | finish: | |
1359 | free(device); | |
1360 | free(path); | |
1361 | free(options); | |
a2e0f3d3 | 1362 | free(options2); |
e537352b LP |
1363 | free(fstype); |
1364 | free(d); | |
1365 | free(p); | |
a2e0f3d3 | 1366 | free(o); |
e537352b LP |
1367 | |
1368 | return r; | |
1369 | } | |
1370 | ||
1371 | static void mount_shutdown(Manager *m) { | |
1372 | assert(m); | |
1373 | ||
a16e1123 | 1374 | if (m->proc_self_mountinfo) { |
e537352b | 1375 | fclose(m->proc_self_mountinfo); |
a16e1123 LP |
1376 | m->proc_self_mountinfo = NULL; |
1377 | } | |
b08d03ff LP |
1378 | } |
1379 | ||
1380 | static int mount_enumerate(Manager *m) { | |
1381 | int r; | |
ef734fd6 | 1382 | struct epoll_event ev; |
b08d03ff LP |
1383 | assert(m); |
1384 | ||
a16e1123 LP |
1385 | if (!m->proc_self_mountinfo) { |
1386 | if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re"))) | |
1387 | return -errno; | |
ef734fd6 | 1388 | |
a16e1123 LP |
1389 | m->mount_watch.type = WATCH_MOUNT; |
1390 | m->mount_watch.fd = fileno(m->proc_self_mountinfo); | |
ef734fd6 | 1391 | |
a16e1123 LP |
1392 | zero(ev); |
1393 | ev.events = EPOLLERR; | |
1394 | ev.data.ptr = &m->mount_watch; | |
ef734fd6 | 1395 | |
a16e1123 LP |
1396 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0) |
1397 | return -errno; | |
1398 | } | |
ef734fd6 | 1399 | |
e537352b | 1400 | if ((r = mount_load_etc_fstab(m)) < 0) |
b08d03ff LP |
1401 | goto fail; |
1402 | ||
ef734fd6 | 1403 | if ((r = mount_load_proc_self_mountinfo(m, false)) < 0) |
b08d03ff LP |
1404 | goto fail; |
1405 | ||
1406 | return 0; | |
1407 | ||
1408 | fail: | |
1409 | mount_shutdown(m); | |
1410 | return r; | |
5cb5a6ff LP |
1411 | } |
1412 | ||
ef734fd6 LP |
1413 | void mount_fd_event(Manager *m, int events) { |
1414 | Meta *meta; | |
1415 | int r; | |
1416 | ||
1417 | assert(m); | |
f94ea366 | 1418 | assert(events == EPOLLERR); |
ef734fd6 LP |
1419 | |
1420 | /* The manager calls this for every fd event happening on the | |
1421 | * /proc/self/mountinfo file, which informs us about mounting | |
1422 | * table changes */ | |
1423 | ||
1424 | if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) { | |
e364ad06 | 1425 | log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r)); |
e537352b LP |
1426 | |
1427 | /* Reset flags, just in case, for later calls */ | |
1428 | LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) { | |
1429 | Mount *mount = (Mount*) meta; | |
1430 | ||
1431 | mount->is_mounted = mount->just_mounted = mount->just_changed = false; | |
1432 | } | |
1433 | ||
ef734fd6 LP |
1434 | return; |
1435 | } | |
1436 | ||
1437 | manager_dispatch_load_queue(m); | |
1438 | ||
1439 | LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) { | |
1440 | Mount *mount = (Mount*) meta; | |
1441 | ||
e537352b LP |
1442 | if (!mount->is_mounted) { |
1443 | /* This has just been unmounted. */ | |
1444 | ||
ef734fd6 | 1445 | mount->from_proc_self_mountinfo = false; |
e537352b LP |
1446 | |
1447 | switch (mount->state) { | |
1448 | ||
1449 | case MOUNT_MOUNTED: | |
1450 | mount_enter_dead(mount, true); | |
1451 | break; | |
1452 | ||
1453 | default: | |
1454 | mount_set_state(mount, mount->state); | |
1455 | break; | |
1456 | ||
1457 | } | |
1458 | ||
1459 | } else if (mount->just_mounted || mount->just_changed) { | |
1460 | ||
1461 | /* New or changed entrymount */ | |
1462 | ||
1463 | switch (mount->state) { | |
1464 | ||
1465 | case MOUNT_DEAD: | |
18c78fb1 | 1466 | case MOUNT_MAINTENANCE: |
e537352b LP |
1467 | mount_enter_mounted(mount, true); |
1468 | break; | |
1469 | ||
1470 | case MOUNT_MOUNTING: | |
8d567588 | 1471 | mount_enter_mounting_done(mount); |
e537352b LP |
1472 | break; |
1473 | ||
1474 | default: | |
1475 | /* Nothing really changed, but let's | |
1476 | * issue an notification call | |
1477 | * nonetheless, in case somebody is | |
1478 | * waiting for this. (e.g. file system | |
1479 | * ro/rw remounts.) */ | |
1480 | mount_set_state(mount, mount->state); | |
1481 | break; | |
1482 | } | |
1483 | } | |
1484 | ||
1485 | /* Reset the flags for later calls */ | |
1486 | mount->is_mounted = mount->just_mounted = mount->just_changed = false; | |
1487 | } | |
1488 | } | |
1489 | ||
1490 | int mount_path_is_mounted(Manager *m, const char* path) { | |
1491 | char *t; | |
1492 | int r; | |
1493 | ||
1494 | assert(m); | |
1495 | assert(path); | |
1496 | ||
1497 | if (path[0] != '/') | |
1498 | return 1; | |
1499 | ||
1500 | if (!(t = strdup(path))) | |
1501 | return -ENOMEM; | |
1502 | ||
1503 | path_kill_slashes(t); | |
1504 | ||
1505 | for (;;) { | |
1506 | char *e, *slash; | |
1507 | Unit *u; | |
1508 | ||
a16e1123 | 1509 | if (!(e = unit_name_from_path(t, ".mount"))) { |
e537352b LP |
1510 | r = -ENOMEM; |
1511 | goto finish; | |
1512 | } | |
1513 | ||
1514 | u = manager_get_unit(m, e); | |
1515 | free(e); | |
1516 | ||
1517 | if (u && | |
1518 | (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) && | |
1519 | MOUNT(u)->state != MOUNT_MOUNTED) { | |
1520 | r = 0; | |
1521 | goto finish; | |
ef734fd6 LP |
1522 | } |
1523 | ||
e537352b LP |
1524 | assert_se(slash = strrchr(t, '/')); |
1525 | ||
1526 | if (slash == t) { | |
1527 | r = 1; | |
1528 | goto finish; | |
1529 | } | |
1530 | ||
1531 | *slash = 0; | |
ef734fd6 | 1532 | } |
e537352b LP |
1533 | |
1534 | r = 1; | |
1535 | ||
1536 | finish: | |
1537 | free(t); | |
1538 | return r; | |
ef734fd6 LP |
1539 | } |
1540 | ||
5632e374 LP |
1541 | static void mount_reset_maintenance(Unit *u) { |
1542 | Mount *m = MOUNT(u); | |
1543 | ||
1544 | assert(m); | |
1545 | ||
1546 | if (m->state == MOUNT_MAINTENANCE) | |
1547 | mount_set_state(m, MOUNT_DEAD); | |
1548 | ||
1549 | m->failure = false; | |
1550 | } | |
1551 | ||
a16e1123 LP |
1552 | static const char* const mount_state_table[_MOUNT_STATE_MAX] = { |
1553 | [MOUNT_DEAD] = "dead", | |
1554 | [MOUNT_MOUNTING] = "mounting", | |
1555 | [MOUNT_MOUNTING_DONE] = "mounting-done", | |
1556 | [MOUNT_MOUNTED] = "mounted", | |
1557 | [MOUNT_REMOUNTING] = "remounting", | |
1558 | [MOUNT_UNMOUNTING] = "unmounting", | |
1559 | [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm", | |
1560 | [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill", | |
1561 | [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm", | |
1562 | [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill", | |
1563 | [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm", | |
1564 | [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill", | |
18c78fb1 | 1565 | [MOUNT_MAINTENANCE] = "maintenance" |
a16e1123 LP |
1566 | }; |
1567 | ||
1568 | DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState); | |
1569 | ||
1570 | static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = { | |
1571 | [MOUNT_EXEC_MOUNT] = "ExecMount", | |
1572 | [MOUNT_EXEC_UNMOUNT] = "ExecUnmount", | |
1573 | [MOUNT_EXEC_REMOUNT] = "ExecRemount", | |
1574 | }; | |
1575 | ||
1576 | DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand); | |
1577 | ||
87f0e418 | 1578 | const UnitVTable mount_vtable = { |
5cb5a6ff LP |
1579 | .suffix = ".mount", |
1580 | ||
e537352b | 1581 | .no_alias = true, |
9e2f7c11 | 1582 | .no_instances = true, |
c497c7a9 | 1583 | .no_isolate = true, |
9e58ff9c | 1584 | .show_status = true, |
e537352b LP |
1585 | |
1586 | .init = mount_init, | |
1587 | .load = mount_load, | |
034c6ed7 | 1588 | .done = mount_done, |
e537352b | 1589 | |
f50e0a01 LP |
1590 | .coldplug = mount_coldplug, |
1591 | ||
034c6ed7 | 1592 | .dump = mount_dump, |
5cb5a6ff | 1593 | |
e537352b LP |
1594 | .start = mount_start, |
1595 | .stop = mount_stop, | |
1596 | .reload = mount_reload, | |
1597 | ||
a16e1123 LP |
1598 | .serialize = mount_serialize, |
1599 | .deserialize_item = mount_deserialize_item, | |
1600 | ||
f50e0a01 | 1601 | .active_state = mount_active_state, |
10a94420 | 1602 | .sub_state_to_string = mount_sub_state_to_string, |
b08d03ff | 1603 | |
701cc384 LP |
1604 | .check_gc = mount_check_gc, |
1605 | ||
e537352b LP |
1606 | .sigchld_event = mount_sigchld_event, |
1607 | .timer_event = mount_timer_event, | |
1608 | ||
5632e374 LP |
1609 | .reset_maintenance = mount_reset_maintenance, |
1610 | ||
4139c1b2 LP |
1611 | .bus_message_handler = bus_mount_message_handler, |
1612 | ||
f50e0a01 LP |
1613 | .enumerate = mount_enumerate, |
1614 | .shutdown = mount_shutdown | |
5cb5a6ff | 1615 | }; |