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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
5cb5a6ff | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
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> |
8d3ae2bd | 27 | #include <libmount.h> |
befb6d54 | 28 | #include <sys/inotify.h> |
5cb5a6ff | 29 | |
c17ec25e | 30 | #include "manager.h" |
87f0e418 | 31 | #include "unit.h" |
5cb5a6ff LP |
32 | #include "mount.h" |
33 | #include "load-fragment.h" | |
5cb5a6ff | 34 | #include "load-dropin.h" |
b08d03ff | 35 | #include "log.h" |
20ad4cfd | 36 | #include "sd-messages.h" |
e537352b | 37 | #include "strv.h" |
49e942b2 | 38 | #include "mkdir.h" |
9eb977db | 39 | #include "path-util.h" |
e537352b | 40 | #include "mount-setup.h" |
9e2f7c11 | 41 | #include "unit-name.h" |
4139c1b2 | 42 | #include "dbus-mount.h" |
514f4ef5 | 43 | #include "special.h" |
96aad8d1 | 44 | #include "bus-common-errors.h" |
9a57c629 | 45 | #include "exit-status.h" |
f6a6225e | 46 | #include "def.h" |
d15d0333 | 47 | #include "fstab-util.h" |
5cb5a6ff | 48 | |
7d54a03a LP |
49 | #define RETRY_UMOUNT_MAX 32 |
50 | ||
4e920142 ZJS |
51 | DEFINE_TRIVIAL_CLEANUP_FUNC(struct libmnt_table*, mnt_free_table); |
52 | DEFINE_TRIVIAL_CLEANUP_FUNC(struct libmnt_iter*, mnt_free_iter); | |
53 | ||
f50e0a01 LP |
54 | static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = { |
55 | [MOUNT_DEAD] = UNIT_INACTIVE, | |
56 | [MOUNT_MOUNTING] = UNIT_ACTIVATING, | |
e537352b | 57 | [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE, |
f50e0a01 | 58 | [MOUNT_MOUNTED] = UNIT_ACTIVE, |
032ff4af | 59 | [MOUNT_REMOUNTING] = UNIT_RELOADING, |
f50e0a01 | 60 | [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING, |
e537352b LP |
61 | [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING, |
62 | [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING, | |
032ff4af LP |
63 | [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING, |
64 | [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING, | |
e537352b LP |
65 | [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING, |
66 | [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING, | |
fdf20a31 | 67 | [MOUNT_FAILED] = UNIT_FAILED |
f50e0a01 | 68 | }; |
5cb5a6ff | 69 | |
718db961 LP |
70 | static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); |
71 | static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); | |
72 | ||
affc3d83 | 73 | static bool mount_needs_network(const char *options, const char *fstype) { |
d15d0333 | 74 | if (fstab_test_option(options, "_netdev\0")) |
fc676b00 ZJS |
75 | return true; |
76 | ||
affc3d83 | 77 | if (fstype && fstype_is_network(fstype)) |
fc676b00 ZJS |
78 | return true; |
79 | ||
80 | return false; | |
81 | } | |
82 | ||
e6a7b9f4 | 83 | static bool mount_is_network(const MountParameters *p) { |
affc3d83 CL |
84 | assert(p); |
85 | ||
86 | return mount_needs_network(p->options, p->fstype); | |
87 | } | |
88 | ||
e6a7b9f4 | 89 | static bool mount_is_bind(const MountParameters *p) { |
fc676b00 ZJS |
90 | assert(p); |
91 | ||
d15d0333 | 92 | if (fstab_test_option(p->options, "bind\0" "rbind\0")) |
fc676b00 ZJS |
93 | return true; |
94 | ||
d15d0333 | 95 | if (p->fstype && STR_IN_SET(p->fstype, "bind", "rbind")) |
fc676b00 ZJS |
96 | return true; |
97 | ||
98 | return false; | |
99 | } | |
100 | ||
e6a7b9f4 | 101 | static bool mount_is_auto(const MountParameters *p) { |
fc676b00 ZJS |
102 | assert(p); |
103 | ||
d15d0333 | 104 | return !fstab_test_option(p->options, "noauto\0"); |
fc676b00 ZJS |
105 | } |
106 | ||
e6a7b9f4 | 107 | static bool needs_quota(const MountParameters *p) { |
fc676b00 ZJS |
108 | assert(p); |
109 | ||
110 | if (mount_is_network(p)) | |
111 | return false; | |
112 | ||
113 | if (mount_is_bind(p)) | |
114 | return false; | |
115 | ||
d15d0333 ZJS |
116 | return fstab_test_option(p->options, |
117 | "usrquota\0" "grpquota\0" "quota\0" "usrjquota\0" "grpjquota\0"); | |
fc676b00 ZJS |
118 | } |
119 | ||
a16e1123 LP |
120 | static void mount_init(Unit *u) { |
121 | Mount *m = MOUNT(u); | |
5cb5a6ff | 122 | |
a16e1123 | 123 | assert(u); |
ac155bb8 | 124 | assert(u->load_state == UNIT_STUB); |
a16e1123 | 125 | |
1f19a534 | 126 | m->timeout_usec = u->manager->default_timeout_start_usec; |
3e5235b0 LP |
127 | m->directory_mode = 0755; |
128 | ||
6b1dc2bd LP |
129 | if (unit_has_name(u, "-.mount")) { |
130 | /* Don't allow start/stop for root directory */ | |
5bcb0f2b LP |
131 | u->refuse_manual_start = true; |
132 | u->refuse_manual_stop = true; | |
6b1dc2bd LP |
133 | } else { |
134 | /* The stdio/kmsg bridge socket is on /, in order to avoid a | |
135 | * dep loop, don't use kmsg logging for -.mount */ | |
ac155bb8 MS |
136 | m->exec_context.std_output = u->manager->default_std_output; |
137 | m->exec_context.std_error = u->manager->default_std_error; | |
f6cebb3b | 138 | } |
c3686083 | 139 | |
a16e1123 LP |
140 | /* We need to make sure that /bin/mount is always called in |
141 | * the same process group as us, so that the autofs kernel | |
142 | * side doesn't send us another mount request while we are | |
143 | * already trying to comply its last one. */ | |
74922904 | 144 | m->exec_context.same_pgrp = true; |
8d567588 | 145 | |
a16e1123 | 146 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; |
c8f4d764 | 147 | |
5bcb0f2b | 148 | u->ignore_on_isolate = true; |
8d567588 LP |
149 | } |
150 | ||
718db961 LP |
151 | static int mount_arm_timer(Mount *m) { |
152 | int r; | |
153 | ||
154 | assert(m); | |
155 | ||
156 | if (m->timeout_usec <= 0) { | |
157 | m->timer_event_source = sd_event_source_unref(m->timer_event_source); | |
158 | return 0; | |
159 | } | |
160 | ||
161 | if (m->timer_event_source) { | |
162 | r = sd_event_source_set_time(m->timer_event_source, now(CLOCK_MONOTONIC) + m->timeout_usec); | |
163 | if (r < 0) | |
164 | return r; | |
165 | ||
166 | return sd_event_source_set_enabled(m->timer_event_source, SD_EVENT_ONESHOT); | |
167 | } | |
168 | ||
6a0f1f6d LP |
169 | return sd_event_add_time( |
170 | UNIT(m)->manager->event, | |
171 | &m->timer_event_source, | |
172 | CLOCK_MONOTONIC, | |
173 | now(CLOCK_MONOTONIC) + m->timeout_usec, 0, | |
174 | mount_dispatch_timer, m); | |
718db961 LP |
175 | } |
176 | ||
a16e1123 | 177 | static void mount_unwatch_control_pid(Mount *m) { |
5e94833f LP |
178 | assert(m); |
179 | ||
180 | if (m->control_pid <= 0) | |
181 | return; | |
182 | ||
183 | unit_unwatch_pid(UNIT(m), m->control_pid); | |
184 | m->control_pid = 0; | |
185 | } | |
186 | ||
e537352b LP |
187 | static void mount_parameters_done(MountParameters *p) { |
188 | assert(p); | |
189 | ||
190 | free(p->what); | |
191 | free(p->options); | |
192 | free(p->fstype); | |
193 | ||
194 | p->what = p->options = p->fstype = NULL; | |
195 | } | |
196 | ||
87f0e418 | 197 | static void mount_done(Unit *u) { |
ef734fd6 | 198 | Mount *m = MOUNT(u); |
034c6ed7 | 199 | |
ef734fd6 | 200 | assert(m); |
034c6ed7 | 201 | |
e537352b LP |
202 | free(m->where); |
203 | m->where = NULL; | |
f50e0a01 | 204 | |
e537352b LP |
205 | mount_parameters_done(&m->parameters_proc_self_mountinfo); |
206 | mount_parameters_done(&m->parameters_fragment); | |
ef734fd6 | 207 | |
613b411c | 208 | m->exec_runtime = exec_runtime_unref(m->exec_runtime); |
e537352b LP |
209 | exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX); |
210 | m->control_command = NULL; | |
f50e0a01 | 211 | |
a16e1123 | 212 | mount_unwatch_control_pid(m); |
f50e0a01 | 213 | |
718db961 | 214 | m->timer_event_source = sd_event_source_unref(m->timer_event_source); |
f50e0a01 LP |
215 | } |
216 | ||
44a6b1b6 | 217 | _pure_ static MountParameters* get_mount_parameters_fragment(Mount *m) { |
cb39ed3f LP |
218 | assert(m); |
219 | ||
220 | if (m->from_fragment) | |
221 | return &m->parameters_fragment; | |
cb39ed3f LP |
222 | |
223 | return NULL; | |
224 | } | |
225 | ||
44a6b1b6 | 226 | _pure_ static MountParameters* get_mount_parameters(Mount *m) { |
cb39ed3f LP |
227 | assert(m); |
228 | ||
229 | if (m->from_proc_self_mountinfo) | |
230 | return &m->parameters_proc_self_mountinfo; | |
231 | ||
6b1dc2bd | 232 | return get_mount_parameters_fragment(m); |
cb39ed3f LP |
233 | } |
234 | ||
6e2ef85b | 235 | static int mount_add_mount_links(Mount *m) { |
a57f7e2c | 236 | _cleanup_free_ char *parent = NULL; |
5c78d8e2 | 237 | MountParameters *pm; |
ac155bb8 | 238 | Unit *other; |
a57f7e2c LP |
239 | Iterator i; |
240 | Set *s; | |
b08d03ff LP |
241 | int r; |
242 | ||
6e2ef85b | 243 | assert(m); |
b08d03ff | 244 | |
a57f7e2c LP |
245 | if (!path_equal(m->where, "/")) { |
246 | /* Adds in links to other mount points that might lie further | |
247 | * up in the hierarchy */ | |
248 | r = path_get_parent(m->where, &parent); | |
4f0eedb7 | 249 | if (r < 0) |
6e2ef85b | 250 | return r; |
01f78473 | 251 | |
a57f7e2c | 252 | r = unit_require_mounts_for(UNIT(m), parent); |
4f0eedb7 | 253 | if (r < 0) |
01f78473 | 254 | return r; |
4f0eedb7 | 255 | } |
01f78473 | 256 | |
a57f7e2c LP |
257 | /* Adds in links to other mount points that might be needed |
258 | * for the source path (if this is a bind mount) to be | |
259 | * available. */ | |
260 | pm = get_mount_parameters_fragment(m); | |
fc676b00 ZJS |
261 | if (pm && pm->what && |
262 | path_is_absolute(pm->what) && | |
263 | !mount_is_network(pm)) { | |
264 | ||
a57f7e2c | 265 | r = unit_require_mounts_for(UNIT(m), pm->what); |
4f0eedb7 | 266 | if (r < 0) |
6e2ef85b | 267 | return r; |
4f0eedb7 | 268 | } |
b08d03ff | 269 | |
a57f7e2c LP |
270 | /* Adds in links to other units that use this path or paths |
271 | * further down in the hierarchy */ | |
272 | s = manager_get_units_requiring_mounts_for(UNIT(m)->manager, m->where); | |
273 | SET_FOREACH(other, s, i) { | |
b08d03ff | 274 | |
a57f7e2c LP |
275 | if (other->load_state != UNIT_LOADED) |
276 | continue; | |
b08d03ff | 277 | |
a57f7e2c LP |
278 | if (other == UNIT(m)) |
279 | continue; | |
b08d03ff | 280 | |
a57f7e2c | 281 | r = unit_add_dependency(other, UNIT_AFTER, UNIT(m), true); |
4f0eedb7 | 282 | if (r < 0) |
6e2ef85b | 283 | return r; |
b08d03ff | 284 | |
a57f7e2c LP |
285 | if (UNIT(m)->fragment_path) { |
286 | /* If we have fragment configuration, then make this dependency required */ | |
287 | r = unit_add_dependency(other, UNIT_REQUIRES, UNIT(m), true); | |
288 | if (r < 0) | |
289 | return r; | |
290 | } | |
7c8fa05c LP |
291 | } |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
173a8d04 LP |
296 | static int mount_add_device_links(Mount *m) { |
297 | MountParameters *p; | |
5073f89f | 298 | bool device_wants_mount = false; |
9fff8a1f | 299 | int r; |
173a8d04 LP |
300 | |
301 | assert(m); | |
302 | ||
6b1dc2bd LP |
303 | p = get_mount_parameters_fragment(m); |
304 | if (!p) | |
173a8d04 LP |
305 | return 0; |
306 | ||
9fff8a1f | 307 | if (!p->what) |
173a8d04 | 308 | return 0; |
5c78d8e2 | 309 | |
dd144c63 LP |
310 | if (mount_is_bind(p)) |
311 | return 0; | |
312 | ||
313 | if (!is_device_path(p->what)) | |
314 | return 0; | |
315 | ||
316 | if (path_equal(m->where, "/")) | |
317 | return 0; | |
318 | ||
5073f89f TG |
319 | if (mount_is_auto(p) && UNIT(m)->manager->running_as == SYSTEMD_SYSTEM) |
320 | device_wants_mount = true; | |
321 | ||
322 | r = unit_add_node_link(UNIT(m), p->what, device_wants_mount); | |
dd144c63 LP |
323 | if (r < 0) |
324 | return r; | |
9fff8a1f | 325 | |
9fff8a1f | 326 | return 0; |
173a8d04 LP |
327 | } |
328 | ||
6b1dc2bd LP |
329 | static int mount_add_quota_links(Mount *m) { |
330 | int r; | |
331 | MountParameters *p; | |
332 | ||
333 | assert(m); | |
334 | ||
67445f4e | 335 | if (UNIT(m)->manager->running_as != SYSTEMD_SYSTEM) |
6b1dc2bd LP |
336 | return 0; |
337 | ||
338 | p = get_mount_parameters_fragment(m); | |
339 | if (!p) | |
340 | return 0; | |
341 | ||
342 | if (!needs_quota(p)) | |
343 | return 0; | |
344 | ||
345 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true); | |
346 | if (r < 0) | |
347 | return r; | |
348 | ||
349 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true); | |
350 | if (r < 0) | |
351 | return r; | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
88ac30a1 TG |
356 | static bool should_umount(Mount *m) { |
357 | MountParameters *p; | |
358 | ||
359 | if (path_equal(m->where, "/") || | |
360 | path_equal(m->where, "/usr")) | |
361 | return false; | |
362 | ||
363 | p = get_mount_parameters(m); | |
d15d0333 | 364 | if (p && fstab_test_option(p->options, "x-initrd.mount\0") && |
88ac30a1 TG |
365 | !in_initrd()) |
366 | return false; | |
367 | ||
368 | return true; | |
369 | } | |
370 | ||
2edd4434 | 371 | static int mount_add_default_dependencies(Mount *m) { |
0c17fbce | 372 | const char *after, *after2, *online; |
9ddc4a26 | 373 | MountParameters *p; |
0c17fbce | 374 | int r; |
2edd4434 LP |
375 | |
376 | assert(m); | |
377 | ||
67445f4e | 378 | if (UNIT(m)->manager->running_as != SYSTEMD_SYSTEM) |
9ddc4a26 | 379 | return 0; |
cb39ed3f | 380 | |
874d3404 LP |
381 | /* We do not add any default dependencies to / and /usr, since |
382 | * they are guaranteed to stay mounted the whole time, since | |
383 | * our system is on it. Also, don't bother with anything | |
384 | * mounted below virtual file systems, it's also going to be | |
385 | * virtual, and hence not worth the effort. */ | |
386 | if (path_equal(m->where, "/") || | |
387 | path_equal(m->where, "/usr") || | |
388 | path_startswith(m->where, "/proc") || | |
389 | path_startswith(m->where, "/sys") || | |
390 | path_startswith(m->where, "/dev")) | |
6b1dc2bd | 391 | return 0; |
2edd4434 | 392 | |
874d3404 LP |
393 | p = get_mount_parameters(m); |
394 | if (!p) | |
6b1dc2bd LP |
395 | return 0; |
396 | ||
e8d2f6cd | 397 | if (mount_is_network(p)) { |
6b1dc2bd | 398 | after = SPECIAL_REMOTE_FS_PRE_TARGET; |
a63a5c46 | 399 | after2 = SPECIAL_NETWORK_TARGET; |
0c17fbce | 400 | online = SPECIAL_NETWORK_ONLINE_TARGET; |
e8d2f6cd | 401 | } else { |
6b1dc2bd | 402 | after = SPECIAL_LOCAL_FS_PRE_TARGET; |
a63a5c46 | 403 | after2 = NULL; |
0c17fbce | 404 | online = NULL; |
e8d2f6cd | 405 | } |
6b1dc2bd | 406 | |
e8d2f6cd | 407 | r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true); |
6b1dc2bd LP |
408 | if (r < 0) |
409 | return r; | |
410 | ||
a63a5c46 LP |
411 | if (after2) { |
412 | r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after2, NULL, true); | |
413 | if (r < 0) | |
414 | return r; | |
415 | } | |
416 | ||
0c17fbce LP |
417 | if (online) { |
418 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_WANTS, UNIT_AFTER, online, NULL, true); | |
e8d2f6cd LP |
419 | if (r < 0) |
420 | return r; | |
421 | } | |
422 | ||
88ac30a1 TG |
423 | if (should_umount(m)) { |
424 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true); | |
425 | if (r < 0) | |
426 | return r; | |
427 | } | |
2edd4434 LP |
428 | |
429 | return 0; | |
430 | } | |
431 | ||
8d567588 | 432 | static int mount_verify(Mount *m) { |
a57f7e2c | 433 | _cleanup_free_ char *e = NULL; |
8d567588 | 434 | bool b; |
a57f7e2c | 435 | |
8d567588 LP |
436 | assert(m); |
437 | ||
1124fe6f | 438 | if (UNIT(m)->load_state != UNIT_LOADED) |
8d567588 LP |
439 | return 0; |
440 | ||
6b1dc2bd | 441 | if (!m->from_fragment && !m->from_proc_self_mountinfo) |
8cbef760 LP |
442 | return -ENOENT; |
443 | ||
a57f7e2c LP |
444 | e = unit_name_from_path(m->where, ".mount"); |
445 | if (!e) | |
8d567588 LP |
446 | return -ENOMEM; |
447 | ||
448 | b = unit_has_name(UNIT(m), e); | |
8d567588 | 449 | if (!b) { |
79008bdd | 450 | log_unit_error(UNIT(m)->id, "%s's Where= setting doesn't match unit name. Refusing.", UNIT(m)->id); |
8d567588 LP |
451 | return -EINVAL; |
452 | } | |
453 | ||
33ff02c9 | 454 | if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) { |
79008bdd | 455 | log_unit_error(UNIT(m)->id, "Cannot create mount unit for API file system %s. Refusing.", m->where); |
33ff02c9 LP |
456 | return -EINVAL; |
457 | } | |
458 | ||
1124fe6f | 459 | if (UNIT(m)->fragment_path && !m->parameters_fragment.what) { |
79008bdd | 460 | log_unit_error(UNIT(m)->id, "%s's What setting is missing. Refusing.", UNIT(m)->id); |
4e85aff4 LP |
461 | return -EBADMSG; |
462 | } | |
463 | ||
4819ff03 | 464 | if (m->exec_context.pam_name && m->kill_context.kill_mode != KILL_CONTROL_GROUP) { |
79008bdd | 465 | log_unit_error(UNIT(m)->id, "%s has PAM enabled. Kill mode must be set to control-group'. Refusing.",UNIT(m)->id); |
4d0e5dbd LP |
466 | return -EINVAL; |
467 | } | |
468 | ||
8d567588 LP |
469 | return 0; |
470 | } | |
471 | ||
1a4ac875 MS |
472 | static int mount_add_extras(Mount *m) { |
473 | Unit *u = UNIT(m); | |
e537352b LP |
474 | int r; |
475 | ||
e821075a LP |
476 | assert(m); |
477 | ||
478 | if (u->fragment_path) | |
1a4ac875 | 479 | m->from_fragment = true; |
e537352b | 480 | |
1a4ac875 MS |
481 | if (!m->where) { |
482 | m->where = unit_name_to_path(u->id); | |
a16e1123 | 483 | if (!m->where) |
1a4ac875 MS |
484 | return -ENOMEM; |
485 | } | |
a16e1123 | 486 | |
1a4ac875 | 487 | path_kill_slashes(m->where); |
e537352b | 488 | |
e821075a | 489 | if (!u->description) { |
1a4ac875 MS |
490 | r = unit_set_description(u, m->where); |
491 | if (r < 0) | |
173a8d04 | 492 | return r; |
1a4ac875 | 493 | } |
6e2ef85b | 494 | |
1a4ac875 MS |
495 | r = mount_add_device_links(m); |
496 | if (r < 0) | |
497 | return r; | |
6e2ef85b | 498 | |
1a4ac875 MS |
499 | r = mount_add_mount_links(m); |
500 | if (r < 0) | |
501 | return r; | |
6e2ef85b | 502 | |
1a4ac875 MS |
503 | r = mount_add_quota_links(m); |
504 | if (r < 0) | |
505 | return r; | |
e537352b | 506 | |
598459ce LP |
507 | r = unit_patch_contexts(u); |
508 | if (r < 0) | |
509 | return r; | |
4e67ddd6 | 510 | |
598459ce | 511 | r = unit_add_exec_dependencies(u, &m->exec_context); |
a016b922 LP |
512 | if (r < 0) |
513 | return r; | |
514 | ||
598459ce | 515 | r = unit_add_default_slice(u, &m->cgroup_context); |
1a4ac875 MS |
516 | if (r < 0) |
517 | return r; | |
518 | ||
598459ce LP |
519 | if (u->default_dependencies) { |
520 | r = mount_add_default_dependencies(m); | |
521 | if (r < 0) | |
522 | return r; | |
523 | } | |
524 | ||
1a4ac875 MS |
525 | return 0; |
526 | } | |
527 | ||
528 | static int mount_load(Unit *u) { | |
529 | Mount *m = MOUNT(u); | |
530 | int r; | |
531 | ||
532 | assert(u); | |
533 | assert(u->load_state == UNIT_STUB); | |
534 | ||
8eba616f MS |
535 | if (m->from_proc_self_mountinfo) |
536 | r = unit_load_fragment_and_dropin_optional(u); | |
537 | else | |
538 | r = unit_load_fragment_and_dropin(u); | |
539 | ||
1a4ac875 MS |
540 | if (r < 0) |
541 | return r; | |
155da457 | 542 | |
1a4ac875 MS |
543 | /* This is a new unit? Then let's add in some extras */ |
544 | if (u->load_state == UNIT_LOADED) { | |
545 | r = mount_add_extras(m); | |
546 | if (r < 0) | |
547 | return r; | |
e537352b LP |
548 | } |
549 | ||
8d567588 | 550 | return mount_verify(m); |
e537352b LP |
551 | } |
552 | ||
a16e1123 LP |
553 | static int mount_notify_automount(Mount *m, int status) { |
554 | Unit *p; | |
555 | int r; | |
57020a3a | 556 | Iterator i; |
a16e1123 LP |
557 | |
558 | assert(m); | |
559 | ||
1124fe6f | 560 | SET_FOREACH(p, UNIT(m)->dependencies[UNIT_TRIGGERED_BY], i) |
ac155bb8 | 561 | if (p->type == UNIT_AUTOMOUNT) { |
57020a3a LP |
562 | r = automount_send_ready(AUTOMOUNT(p), status); |
563 | if (r < 0) | |
564 | return r; | |
565 | } | |
a16e1123 | 566 | |
57020a3a | 567 | return 0; |
a16e1123 LP |
568 | } |
569 | ||
e537352b LP |
570 | static void mount_set_state(Mount *m, MountState state) { |
571 | MountState old_state; | |
572 | assert(m); | |
573 | ||
574 | old_state = m->state; | |
575 | m->state = state; | |
576 | ||
577 | if (state != MOUNT_MOUNTING && | |
578 | state != MOUNT_MOUNTING_DONE && | |
579 | state != MOUNT_REMOUNTING && | |
580 | state != MOUNT_UNMOUNTING && | |
581 | state != MOUNT_MOUNTING_SIGTERM && | |
582 | state != MOUNT_MOUNTING_SIGKILL && | |
583 | state != MOUNT_UNMOUNTING_SIGTERM && | |
584 | state != MOUNT_UNMOUNTING_SIGKILL && | |
585 | state != MOUNT_REMOUNTING_SIGTERM && | |
586 | state != MOUNT_REMOUNTING_SIGKILL) { | |
718db961 | 587 | m->timer_event_source = sd_event_source_unref(m->timer_event_source); |
a16e1123 | 588 | mount_unwatch_control_pid(m); |
e537352b | 589 | m->control_command = NULL; |
a16e1123 | 590 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; |
e537352b LP |
591 | } |
592 | ||
8d567588 LP |
593 | if (state == MOUNT_MOUNTED || |
594 | state == MOUNT_REMOUNTING) | |
595 | mount_notify_automount(m, 0); | |
596 | else if (state == MOUNT_DEAD || | |
597 | state == MOUNT_UNMOUNTING || | |
598 | state == MOUNT_MOUNTING_SIGTERM || | |
599 | state == MOUNT_MOUNTING_SIGKILL || | |
600 | state == MOUNT_REMOUNTING_SIGTERM || | |
601 | state == MOUNT_REMOUNTING_SIGKILL || | |
602 | state == MOUNT_UNMOUNTING_SIGTERM || | |
603 | state == MOUNT_UNMOUNTING_SIGKILL || | |
36fcd77e | 604 | state == MOUNT_FAILED) { |
b929bf04 TA |
605 | if (state != old_state) |
606 | mount_notify_automount(m, -ENODEV); | |
607 | } | |
8d567588 | 608 | |
e537352b | 609 | if (state != old_state) |
79008bdd | 610 | log_unit_debug(UNIT(m)->id, |
66870f90 ZJS |
611 | "%s changed %s -> %s", |
612 | UNIT(m)->id, | |
613 | mount_state_to_string(old_state), | |
614 | mount_state_to_string(state)); | |
e537352b | 615 | |
9d2f5178 LP |
616 | unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], m->reload_result == MOUNT_SUCCESS); |
617 | m->reload_result = MOUNT_SUCCESS; | |
e537352b LP |
618 | } |
619 | ||
620 | static int mount_coldplug(Unit *u) { | |
621 | Mount *m = MOUNT(u); | |
a16e1123 LP |
622 | MountState new_state = MOUNT_DEAD; |
623 | int r; | |
e537352b LP |
624 | |
625 | assert(m); | |
626 | assert(m->state == MOUNT_DEAD); | |
627 | ||
a16e1123 LP |
628 | if (m->deserialized_state != m->state) |
629 | new_state = m->deserialized_state; | |
630 | else if (m->from_proc_self_mountinfo) | |
631 | new_state = MOUNT_MOUNTED; | |
e537352b | 632 | |
5bcb0f2b LP |
633 | if (new_state == m->state) |
634 | return 0; | |
e537352b | 635 | |
5bcb0f2b LP |
636 | if (new_state == MOUNT_MOUNTING || |
637 | new_state == MOUNT_MOUNTING_DONE || | |
638 | new_state == MOUNT_REMOUNTING || | |
639 | new_state == MOUNT_UNMOUNTING || | |
640 | new_state == MOUNT_MOUNTING_SIGTERM || | |
641 | new_state == MOUNT_MOUNTING_SIGKILL || | |
642 | new_state == MOUNT_UNMOUNTING_SIGTERM || | |
643 | new_state == MOUNT_UNMOUNTING_SIGKILL || | |
644 | new_state == MOUNT_REMOUNTING_SIGTERM || | |
645 | new_state == MOUNT_REMOUNTING_SIGKILL) { | |
646 | ||
647 | if (m->control_pid <= 0) | |
648 | return -EBADMSG; | |
649 | ||
650 | r = unit_watch_pid(UNIT(m), m->control_pid); | |
651 | if (r < 0) | |
652 | return r; | |
e537352b | 653 | |
5bcb0f2b LP |
654 | r = mount_arm_timer(m); |
655 | if (r < 0) | |
656 | return r; | |
a16e1123 | 657 | } |
e537352b | 658 | |
5bcb0f2b | 659 | mount_set_state(m, new_state); |
e537352b | 660 | return 0; |
e537352b LP |
661 | } |
662 | ||
663 | static void mount_dump(Unit *u, FILE *f, const char *prefix) { | |
664 | Mount *m = MOUNT(u); | |
665 | MountParameters *p; | |
666 | ||
667 | assert(m); | |
668 | assert(f); | |
669 | ||
cb39ed3f | 670 | p = get_mount_parameters(m); |
e537352b LP |
671 | |
672 | fprintf(f, | |
673 | "%sMount State: %s\n" | |
81a5c6d0 | 674 | "%sResult: %s\n" |
e537352b LP |
675 | "%sWhere: %s\n" |
676 | "%sWhat: %s\n" | |
677 | "%sFile System Type: %s\n" | |
678 | "%sOptions: %s\n" | |
e537352b LP |
679 | "%sFrom /proc/self/mountinfo: %s\n" |
680 | "%sFrom fragment: %s\n" | |
3e5235b0 | 681 | "%sDirectoryMode: %04o\n", |
a16e1123 | 682 | prefix, mount_state_to_string(m->state), |
81a5c6d0 | 683 | prefix, mount_result_to_string(m->result), |
e537352b | 684 | prefix, m->where, |
1e4fc9b1 HH |
685 | prefix, p ? strna(p->what) : "n/a", |
686 | prefix, p ? strna(p->fstype) : "n/a", | |
687 | prefix, p ? strna(p->options) : "n/a", | |
e537352b LP |
688 | prefix, yes_no(m->from_proc_self_mountinfo), |
689 | prefix, yes_no(m->from_fragment), | |
3e5235b0 | 690 | prefix, m->directory_mode); |
e537352b LP |
691 | |
692 | if (m->control_pid > 0) | |
693 | fprintf(f, | |
ccd06097 ZJS |
694 | "%sControl PID: "PID_FMT"\n", |
695 | prefix, m->control_pid); | |
e537352b LP |
696 | |
697 | exec_context_dump(&m->exec_context, f, prefix); | |
4819ff03 | 698 | kill_context_dump(&m->kill_context, f, prefix); |
e537352b LP |
699 | } |
700 | ||
a16e1123 LP |
701 | static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) { |
702 | pid_t pid; | |
703 | int r; | |
9fa95f85 DM |
704 | ExecParameters exec_params = { |
705 | .apply_permissions = true, | |
706 | .apply_chroot = true, | |
707 | .apply_tty_stdin = true, | |
708 | }; | |
a16e1123 LP |
709 | |
710 | assert(m); | |
711 | assert(c); | |
712 | assert(_pid); | |
713 | ||
4ad49000 LP |
714 | unit_realize_cgroup(UNIT(m)); |
715 | ||
613b411c LP |
716 | r = unit_setup_exec_runtime(UNIT(m)); |
717 | if (r < 0) | |
718 | goto fail; | |
719 | ||
718db961 | 720 | r = mount_arm_timer(m); |
36697dc0 | 721 | if (r < 0) |
a16e1123 LP |
722 | goto fail; |
723 | ||
9fa95f85 DM |
724 | exec_params.environment = UNIT(m)->manager->environment; |
725 | exec_params.confirm_spawn = UNIT(m)->manager->confirm_spawn; | |
726 | exec_params.cgroup_supported = UNIT(m)->manager->cgroup_supported; | |
727 | exec_params.cgroup_path = UNIT(m)->cgroup_path; | |
a931ad47 | 728 | exec_params.cgroup_delegate = m->cgroup_context.delegate; |
9fa95f85 DM |
729 | exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(m)->manager); |
730 | exec_params.unit_id = UNIT(m)->id; | |
731 | ||
4ad49000 | 732 | r = exec_spawn(c, |
4ad49000 | 733 | &m->exec_context, |
9fa95f85 | 734 | &exec_params, |
613b411c | 735 | m->exec_runtime, |
4ad49000 LP |
736 | &pid); |
737 | if (r < 0) | |
a16e1123 LP |
738 | goto fail; |
739 | ||
4ad49000 LP |
740 | r = unit_watch_pid(UNIT(m), pid); |
741 | if (r < 0) | |
a16e1123 LP |
742 | /* FIXME: we need to do something here */ |
743 | goto fail; | |
744 | ||
745 | *_pid = pid; | |
746 | ||
747 | return 0; | |
748 | ||
749 | fail: | |
718db961 | 750 | m->timer_event_source = sd_event_source_unref(m->timer_event_source); |
a16e1123 LP |
751 | |
752 | return r; | |
753 | } | |
754 | ||
9d2f5178 | 755 | static void mount_enter_dead(Mount *m, MountResult f) { |
e537352b LP |
756 | assert(m); |
757 | ||
9d2f5178 LP |
758 | if (f != MOUNT_SUCCESS) |
759 | m->result = f; | |
e537352b | 760 | |
613b411c LP |
761 | exec_runtime_destroy(m->exec_runtime); |
762 | m->exec_runtime = exec_runtime_unref(m->exec_runtime); | |
763 | ||
e66cf1a3 LP |
764 | exec_context_destroy_runtime_directory(&m->exec_context, manager_get_runtime_prefix(UNIT(m)->manager)); |
765 | ||
9d2f5178 | 766 | mount_set_state(m, m->result != MOUNT_SUCCESS ? MOUNT_FAILED : MOUNT_DEAD); |
e537352b LP |
767 | } |
768 | ||
9d2f5178 | 769 | static void mount_enter_mounted(Mount *m, MountResult f) { |
80876c20 LP |
770 | assert(m); |
771 | ||
9d2f5178 LP |
772 | if (f != MOUNT_SUCCESS) |
773 | m->result = f; | |
80876c20 LP |
774 | |
775 | mount_set_state(m, MOUNT_MOUNTED); | |
776 | } | |
777 | ||
9d2f5178 | 778 | static void mount_enter_signal(Mount *m, MountState state, MountResult f) { |
e537352b LP |
779 | int r; |
780 | ||
781 | assert(m); | |
782 | ||
9d2f5178 LP |
783 | if (f != MOUNT_SUCCESS) |
784 | m->result = f; | |
e537352b | 785 | |
cd2086fe LP |
786 | r = unit_kill_context( |
787 | UNIT(m), | |
788 | &m->kill_context, | |
db2cb23b UTL |
789 | (state != MOUNT_MOUNTING_SIGTERM && state != MOUNT_UNMOUNTING_SIGTERM && state != MOUNT_REMOUNTING_SIGTERM) ? |
790 | KILL_KILL : KILL_TERMINATE, | |
cd2086fe LP |
791 | -1, |
792 | m->control_pid, | |
793 | false); | |
794 | if (r < 0) | |
795 | goto fail; | |
e537352b | 796 | |
cd2086fe | 797 | if (r > 0) { |
718db961 | 798 | r = mount_arm_timer(m); |
36697dc0 | 799 | if (r < 0) |
80876c20 | 800 | goto fail; |
e537352b | 801 | |
80876c20 | 802 | mount_set_state(m, state); |
ac84d1fb LP |
803 | } else if (state == MOUNT_REMOUNTING_SIGTERM) |
804 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_SUCCESS); | |
805 | else if (state == MOUNT_REMOUNTING_SIGKILL) | |
9d2f5178 | 806 | mount_enter_mounted(m, MOUNT_SUCCESS); |
ac84d1fb LP |
807 | else if (state == MOUNT_MOUNTING_SIGTERM) |
808 | mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_SUCCESS); | |
809 | else if (state == MOUNT_UNMOUNTING_SIGTERM) | |
810 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_SUCCESS); | |
80876c20 | 811 | else |
9d2f5178 | 812 | mount_enter_dead(m, MOUNT_SUCCESS); |
e537352b LP |
813 | |
814 | return; | |
815 | ||
816 | fail: | |
79008bdd | 817 | log_unit_warning(UNIT(m)->id, |
66870f90 | 818 | "%s failed to kill processes: %s", UNIT(m)->id, strerror(-r)); |
e537352b | 819 | |
80876c20 | 820 | if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL) |
9d2f5178 | 821 | mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES); |
80876c20 | 822 | else |
9d2f5178 | 823 | mount_enter_dead(m, MOUNT_FAILURE_RESOURCES); |
e537352b LP |
824 | } |
825 | ||
20ad4cfd | 826 | void warn_if_dir_nonempty(const char *unit, const char* where) { |
056edeb9 ZJS |
827 | int r; |
828 | ||
cd2086fe LP |
829 | assert(unit); |
830 | assert(where); | |
831 | ||
056edeb9 ZJS |
832 | r = dir_is_empty(where); |
833 | if (r > 0) | |
20ad4cfd | 834 | return; |
056edeb9 | 835 | else if (r == 0) |
e2cc6eca LP |
836 | log_unit_struct(unit, |
837 | LOG_NOTICE, | |
838 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
839 | LOG_MESSAGE("%s: Directory %s to mount over is not empty, mounting anyway.", | |
840 | unit, where), | |
056edeb9 | 841 | "WHERE=%s", where, |
056edeb9 ZJS |
842 | NULL); |
843 | else | |
79008bdd | 844 | log_unit_warning(unit, |
056edeb9 ZJS |
845 | "MESSAGE=Failed to check directory %s: %s", |
846 | where, strerror(-r)); | |
20ad4cfd ZJS |
847 | } |
848 | ||
5261ba90 TT |
849 | static int fail_if_symlink(const char *unit, const char* where) { |
850 | assert(where); | |
851 | ||
852 | if (is_symlink(where) > 0) { | |
e2cc6eca LP |
853 | log_unit_struct(unit, |
854 | LOG_ERR, | |
855 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
856 | LOG_MESSAGE("%s: Mount on symlink %s not allowed.", | |
857 | unit, where), | |
5261ba90 | 858 | "WHERE=%s", where, |
5261ba90 TT |
859 | NULL); |
860 | ||
861 | return -ELOOP; | |
862 | } | |
863 | return 0; | |
864 | } | |
865 | ||
9d2f5178 | 866 | static void mount_enter_unmounting(Mount *m) { |
e537352b LP |
867 | int r; |
868 | ||
869 | assert(m); | |
870 | ||
7d54a03a LP |
871 | /* Start counting our attempts */ |
872 | if (!IN_SET(m->state, | |
873 | MOUNT_UNMOUNTING, | |
874 | MOUNT_UNMOUNTING_SIGTERM, | |
875 | MOUNT_UNMOUNTING_SIGKILL)) | |
876 | m->n_retry_umount = 0; | |
877 | ||
a16e1123 LP |
878 | m->control_command_id = MOUNT_EXEC_UNMOUNT; |
879 | m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT; | |
e537352b | 880 | |
e86b3761 ZJS |
881 | r = exec_command_set(m->control_command, "/bin/umount", m->where, NULL); |
882 | if (r >= 0 && UNIT(m)->manager->running_as == SYSTEMD_SYSTEM) | |
883 | r = exec_command_append(m->control_command, "-n", NULL); | |
7d54a03a | 884 | if (r < 0) |
e537352b LP |
885 | goto fail; |
886 | ||
a16e1123 | 887 | mount_unwatch_control_pid(m); |
5e94833f | 888 | |
7d54a03a LP |
889 | r = mount_spawn(m, m->control_command, &m->control_pid); |
890 | if (r < 0) | |
e537352b LP |
891 | goto fail; |
892 | ||
893 | mount_set_state(m, MOUNT_UNMOUNTING); | |
894 | ||
895 | return; | |
896 | ||
897 | fail: | |
79008bdd | 898 | log_unit_warning(UNIT(m)->id, |
66870f90 ZJS |
899 | "%s failed to run 'umount' task: %s", |
900 | UNIT(m)->id, strerror(-r)); | |
9d2f5178 | 901 | mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES); |
e537352b LP |
902 | } |
903 | ||
8d567588 | 904 | static void mount_enter_mounting(Mount *m) { |
e537352b | 905 | int r; |
cb39ed3f | 906 | MountParameters *p; |
e537352b LP |
907 | |
908 | assert(m); | |
909 | ||
a16e1123 LP |
910 | m->control_command_id = MOUNT_EXEC_MOUNT; |
911 | m->control_command = m->exec_command + MOUNT_EXEC_MOUNT; | |
e537352b | 912 | |
d2e54fae | 913 | mkdir_p_label(m->where, m->directory_mode); |
3e5235b0 | 914 | |
20ad4cfd | 915 | warn_if_dir_nonempty(m->meta.id, m->where); |
257f1d8e | 916 | |
cb39ed3f | 917 | /* Create the source directory for bind-mounts if needed */ |
6b1dc2bd | 918 | p = get_mount_parameters_fragment(m); |
cb39ed3f | 919 | if (p && mount_is_bind(p)) |
d2e54fae | 920 | mkdir_p_label(p->what, m->directory_mode); |
2b583ce6 | 921 | |
5261ba90 TT |
922 | r = fail_if_symlink(m->meta.id, m->where); |
923 | if (r < 0) | |
924 | goto fail; | |
925 | ||
e86b3761 | 926 | if (m->from_fragment) { |
17a1c597 ZJS |
927 | _cleanup_free_ char *opts = NULL; |
928 | ||
929 | r = fstab_filter_options(m->parameters_fragment.options, | |
76c37ab6 | 930 | "nofail\0" "noauto\0" "auto\0", NULL, NULL, &opts); |
17a1c597 ZJS |
931 | if (r < 0) |
932 | goto fail; | |
933 | ||
e86b3761 ZJS |
934 | r = exec_command_set(m->control_command, "/bin/mount", |
935 | m->parameters_fragment.what, m->where, NULL); | |
936 | if (r >= 0 && UNIT(m)->manager->running_as == SYSTEMD_SYSTEM) | |
937 | r = exec_command_append(m->control_command, "-n", NULL); | |
938 | if (r >= 0 && m->sloppy_options) | |
939 | r = exec_command_append(m->control_command, "-s", NULL); | |
940 | if (r >= 0 && m->parameters_fragment.fstype) | |
941 | r = exec_command_append(m->control_command, "-t", m->parameters_fragment.fstype, NULL); | |
0c47569a | 942 | if (r >= 0 && !isempty(opts)) |
17a1c597 | 943 | r = exec_command_append(m->control_command, "-o", opts, NULL); |
e86b3761 | 944 | } else |
e537352b LP |
945 | r = -ENOENT; |
946 | ||
947 | if (r < 0) | |
948 | goto fail; | |
949 | ||
a16e1123 | 950 | mount_unwatch_control_pid(m); |
5e94833f | 951 | |
257f1d8e LP |
952 | r = mount_spawn(m, m->control_command, &m->control_pid); |
953 | if (r < 0) | |
e537352b LP |
954 | goto fail; |
955 | ||
956 | mount_set_state(m, MOUNT_MOUNTING); | |
957 | ||
958 | return; | |
959 | ||
960 | fail: | |
79008bdd | 961 | log_unit_warning(UNIT(m)->id, |
66870f90 ZJS |
962 | "%s failed to run 'mount' task: %s", |
963 | UNIT(m)->id, strerror(-r)); | |
9d2f5178 | 964 | mount_enter_dead(m, MOUNT_FAILURE_RESOURCES); |
e537352b LP |
965 | } |
966 | ||
9d2f5178 | 967 | static void mount_enter_remounting(Mount *m) { |
e537352b LP |
968 | int r; |
969 | ||
970 | assert(m); | |
971 | ||
a16e1123 LP |
972 | m->control_command_id = MOUNT_EXEC_REMOUNT; |
973 | m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT; | |
e537352b LP |
974 | |
975 | if (m->from_fragment) { | |
e537352b LP |
976 | const char *o; |
977 | ||
718db961 LP |
978 | if (m->parameters_fragment.options) |
979 | o = strappenda("remount,", m->parameters_fragment.options); | |
980 | else | |
e537352b LP |
981 | o = "remount"; |
982 | ||
e86b3761 ZJS |
983 | r = exec_command_set(m->control_command, "/bin/mount", |
984 | m->parameters_fragment.what, m->where, | |
985 | "-o", o, NULL); | |
986 | if (r >= 0 && UNIT(m)->manager->running_as == SYSTEMD_SYSTEM) | |
987 | r = exec_command_append(m->control_command, "-n", NULL); | |
988 | if (r >= 0 && m->sloppy_options) | |
989 | r = exec_command_append(m->control_command, "-s", NULL); | |
990 | if (r >= 0 && m->parameters_fragment.fstype) | |
991 | r = exec_command_append(m->control_command, "-t", m->parameters_fragment.fstype, NULL); | |
6b1dc2bd | 992 | } else |
e537352b LP |
993 | r = -ENOENT; |
994 | ||
60b912f6 | 995 | if (r < 0) |
e537352b | 996 | goto fail; |
e537352b | 997 | |
a16e1123 | 998 | mount_unwatch_control_pid(m); |
5e94833f | 999 | |
718db961 LP |
1000 | r = mount_spawn(m, m->control_command, &m->control_pid); |
1001 | if (r < 0) | |
e537352b LP |
1002 | goto fail; |
1003 | ||
1004 | mount_set_state(m, MOUNT_REMOUNTING); | |
1005 | ||
1006 | return; | |
1007 | ||
1008 | fail: | |
79008bdd | 1009 | log_unit_warning(UNIT(m)->id, |
66870f90 ZJS |
1010 | "%s failed to run 'remount' task: %s", |
1011 | UNIT(m)->id, strerror(-r)); | |
9d2f5178 LP |
1012 | m->reload_result = MOUNT_FAILURE_RESOURCES; |
1013 | mount_enter_mounted(m, MOUNT_SUCCESS); | |
e537352b LP |
1014 | } |
1015 | ||
1016 | static int mount_start(Unit *u) { | |
1017 | Mount *m = MOUNT(u); | |
1018 | ||
1019 | assert(m); | |
1020 | ||
1021 | /* We cannot fulfill this request right now, try again later | |
1022 | * please! */ | |
1023 | if (m->state == MOUNT_UNMOUNTING || | |
1024 | m->state == MOUNT_UNMOUNTING_SIGTERM || | |
60b912f6 LP |
1025 | m->state == MOUNT_UNMOUNTING_SIGKILL || |
1026 | m->state == MOUNT_MOUNTING_SIGTERM || | |
1027 | m->state == MOUNT_MOUNTING_SIGKILL) | |
e537352b LP |
1028 | return -EAGAIN; |
1029 | ||
1030 | /* Already on it! */ | |
60b912f6 | 1031 | if (m->state == MOUNT_MOUNTING) |
e537352b LP |
1032 | return 0; |
1033 | ||
fdf20a31 | 1034 | assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED); |
e537352b | 1035 | |
9d2f5178 LP |
1036 | m->result = MOUNT_SUCCESS; |
1037 | m->reload_result = MOUNT_SUCCESS; | |
1038 | ||
8d567588 | 1039 | mount_enter_mounting(m); |
82a2b6bb | 1040 | return 1; |
e537352b LP |
1041 | } |
1042 | ||
1043 | static int mount_stop(Unit *u) { | |
1044 | Mount *m = MOUNT(u); | |
1045 | ||
1046 | assert(m); | |
1047 | ||
e537352b LP |
1048 | /* Already on it */ |
1049 | if (m->state == MOUNT_UNMOUNTING || | |
1050 | m->state == MOUNT_UNMOUNTING_SIGKILL || | |
60b912f6 LP |
1051 | m->state == MOUNT_UNMOUNTING_SIGTERM || |
1052 | m->state == MOUNT_MOUNTING_SIGTERM || | |
1053 | m->state == MOUNT_MOUNTING_SIGKILL) | |
e537352b LP |
1054 | return 0; |
1055 | ||
3f6c78dc LP |
1056 | assert(m->state == MOUNT_MOUNTING || |
1057 | m->state == MOUNT_MOUNTING_DONE || | |
1058 | m->state == MOUNT_MOUNTED || | |
3f6c78dc LP |
1059 | m->state == MOUNT_REMOUNTING || |
1060 | m->state == MOUNT_REMOUNTING_SIGTERM || | |
1061 | m->state == MOUNT_REMOUNTING_SIGKILL); | |
e537352b | 1062 | |
9d2f5178 | 1063 | mount_enter_unmounting(m); |
82a2b6bb | 1064 | return 1; |
e537352b LP |
1065 | } |
1066 | ||
1067 | static int mount_reload(Unit *u) { | |
1068 | Mount *m = MOUNT(u); | |
1069 | ||
1070 | assert(m); | |
1071 | ||
1072 | if (m->state == MOUNT_MOUNTING_DONE) | |
1073 | return -EAGAIN; | |
1074 | ||
1075 | assert(m->state == MOUNT_MOUNTED); | |
1076 | ||
9d2f5178 | 1077 | mount_enter_remounting(m); |
e537352b LP |
1078 | return 0; |
1079 | } | |
1080 | ||
a16e1123 LP |
1081 | static int mount_serialize(Unit *u, FILE *f, FDSet *fds) { |
1082 | Mount *m = MOUNT(u); | |
1083 | ||
1084 | assert(m); | |
1085 | assert(f); | |
1086 | assert(fds); | |
1087 | ||
1088 | unit_serialize_item(u, f, "state", mount_state_to_string(m->state)); | |
9d2f5178 LP |
1089 | unit_serialize_item(u, f, "result", mount_result_to_string(m->result)); |
1090 | unit_serialize_item(u, f, "reload-result", mount_result_to_string(m->reload_result)); | |
a16e1123 LP |
1091 | |
1092 | if (m->control_pid > 0) | |
ccd06097 | 1093 | unit_serialize_item_format(u, f, "control-pid", PID_FMT, m->control_pid); |
a16e1123 LP |
1094 | |
1095 | if (m->control_command_id >= 0) | |
1096 | unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id)); | |
1097 | ||
1098 | return 0; | |
1099 | } | |
1100 | ||
1101 | static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
1102 | Mount *m = MOUNT(u); | |
a16e1123 LP |
1103 | |
1104 | assert(u); | |
1105 | assert(key); | |
1106 | assert(value); | |
1107 | assert(fds); | |
1108 | ||
1109 | if (streq(key, "state")) { | |
1110 | MountState state; | |
1111 | ||
1112 | if ((state = mount_state_from_string(value)) < 0) | |
79008bdd | 1113 | log_unit_debug(u->id, "Failed to parse state value %s", value); |
a16e1123 LP |
1114 | else |
1115 | m->deserialized_state = state; | |
9d2f5178 LP |
1116 | } else if (streq(key, "result")) { |
1117 | MountResult f; | |
a16e1123 | 1118 | |
9d2f5178 LP |
1119 | f = mount_result_from_string(value); |
1120 | if (f < 0) | |
79008bdd | 1121 | log_unit_debug(UNIT(m)->id, |
66870f90 | 1122 | "Failed to parse result value %s", value); |
9d2f5178 LP |
1123 | else if (f != MOUNT_SUCCESS) |
1124 | m->result = f; | |
1125 | ||
1126 | } else if (streq(key, "reload-result")) { | |
1127 | MountResult f; | |
1128 | ||
1129 | f = mount_result_from_string(value); | |
1130 | if (f < 0) | |
79008bdd | 1131 | log_unit_debug(UNIT(m)->id, |
66870f90 | 1132 | "Failed to parse reload result value %s", value); |
9d2f5178 LP |
1133 | else if (f != MOUNT_SUCCESS) |
1134 | m->reload_result = f; | |
a16e1123 LP |
1135 | |
1136 | } else if (streq(key, "control-pid")) { | |
5925dd3c | 1137 | pid_t pid; |
a16e1123 | 1138 | |
e364ad06 | 1139 | if (parse_pid(value, &pid) < 0) |
79008bdd | 1140 | log_unit_debug(UNIT(m)->id, |
66870f90 | 1141 | "Failed to parse control-pid value %s", value); |
a16e1123 | 1142 | else |
5925dd3c | 1143 | m->control_pid = pid; |
a16e1123 LP |
1144 | } else if (streq(key, "control-command")) { |
1145 | MountExecCommand id; | |
1146 | ||
1147 | if ((id = mount_exec_command_from_string(value)) < 0) | |
79008bdd | 1148 | log_unit_debug(UNIT(m)->id, |
66870f90 | 1149 | "Failed to parse exec-command value %s", value); |
a16e1123 LP |
1150 | else { |
1151 | m->control_command_id = id; | |
1152 | m->control_command = m->exec_command + id; | |
1153 | } | |
a16e1123 | 1154 | } else |
79008bdd | 1155 | log_unit_debug(UNIT(m)->id, |
66870f90 | 1156 | "Unknown serialization key '%s'", key); |
a16e1123 LP |
1157 | |
1158 | return 0; | |
1159 | } | |
1160 | ||
44a6b1b6 | 1161 | _pure_ static UnitActiveState mount_active_state(Unit *u) { |
e537352b LP |
1162 | assert(u); |
1163 | ||
1164 | return state_translation_table[MOUNT(u)->state]; | |
1165 | } | |
1166 | ||
44a6b1b6 | 1167 | _pure_ static const char *mount_sub_state_to_string(Unit *u) { |
10a94420 LP |
1168 | assert(u); |
1169 | ||
a16e1123 | 1170 | return mount_state_to_string(MOUNT(u)->state); |
10a94420 LP |
1171 | } |
1172 | ||
44a6b1b6 | 1173 | _pure_ static bool mount_check_gc(Unit *u) { |
701cc384 LP |
1174 | Mount *m = MOUNT(u); |
1175 | ||
1176 | assert(m); | |
1177 | ||
6b1dc2bd | 1178 | return m->from_proc_self_mountinfo; |
701cc384 LP |
1179 | } |
1180 | ||
e537352b LP |
1181 | static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
1182 | Mount *m = MOUNT(u); | |
9d2f5178 | 1183 | MountResult f; |
e537352b LP |
1184 | |
1185 | assert(m); | |
1186 | assert(pid >= 0); | |
1187 | ||
8c47c732 LP |
1188 | if (pid != m->control_pid) |
1189 | return; | |
e537352b | 1190 | |
e537352b LP |
1191 | m->control_pid = 0; |
1192 | ||
96342de6 | 1193 | if (is_clean_exit(code, status, NULL)) |
9d2f5178 LP |
1194 | f = MOUNT_SUCCESS; |
1195 | else if (code == CLD_EXITED) | |
1196 | f = MOUNT_FAILURE_EXIT_CODE; | |
1197 | else if (code == CLD_KILLED) | |
1198 | f = MOUNT_FAILURE_SIGNAL; | |
1199 | else if (code == CLD_DUMPED) | |
1200 | f = MOUNT_FAILURE_CORE_DUMP; | |
1201 | else | |
1202 | assert_not_reached("Unknown code"); | |
1203 | ||
1204 | if (f != MOUNT_SUCCESS) | |
1205 | m->result = f; | |
8c47c732 | 1206 | |
a16e1123 | 1207 | if (m->control_command) { |
6ea832a2 | 1208 | exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status); |
9d2f5178 | 1209 | |
a16e1123 LP |
1210 | m->control_command = NULL; |
1211 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
1212 | } | |
1213 | ||
79008bdd LP |
1214 | log_unit_full(u->id, |
1215 | f == MOUNT_SUCCESS ? LOG_DEBUG : LOG_NOTICE, | |
66870f90 ZJS |
1216 | "%s mount process exited, code=%s status=%i", |
1217 | u->id, sigchld_code_to_string(code), status); | |
e537352b LP |
1218 | |
1219 | /* Note that mount(8) returning and the kernel sending us a | |
1220 | * mount table change event might happen out-of-order. If an | |
1221 | * operation succeed we assume the kernel will follow soon too | |
1222 | * and already change into the resulting state. If it fails | |
1223 | * we check if the kernel still knows about the mount. and | |
1224 | * change state accordingly. */ | |
1225 | ||
1226 | switch (m->state) { | |
1227 | ||
1228 | case MOUNT_MOUNTING: | |
1229 | case MOUNT_MOUNTING_DONE: | |
1230 | case MOUNT_MOUNTING_SIGKILL: | |
1231 | case MOUNT_MOUNTING_SIGTERM: | |
e537352b | 1232 | |
9d2f5178 LP |
1233 | if (f == MOUNT_SUCCESS) |
1234 | mount_enter_mounted(m, f); | |
e537352b | 1235 | else if (m->from_proc_self_mountinfo) |
9d2f5178 | 1236 | mount_enter_mounted(m, f); |
e537352b | 1237 | else |
9d2f5178 | 1238 | mount_enter_dead(m, f); |
e537352b LP |
1239 | break; |
1240 | ||
e2f3b44c LP |
1241 | case MOUNT_REMOUNTING: |
1242 | case MOUNT_REMOUNTING_SIGKILL: | |
1243 | case MOUNT_REMOUNTING_SIGTERM: | |
1244 | ||
9d2f5178 | 1245 | m->reload_result = f; |
e2f3b44c | 1246 | if (m->from_proc_self_mountinfo) |
9d2f5178 | 1247 | mount_enter_mounted(m, MOUNT_SUCCESS); |
e2f3b44c | 1248 | else |
9d2f5178 | 1249 | mount_enter_dead(m, MOUNT_SUCCESS); |
e2f3b44c LP |
1250 | |
1251 | break; | |
1252 | ||
e537352b LP |
1253 | case MOUNT_UNMOUNTING: |
1254 | case MOUNT_UNMOUNTING_SIGKILL: | |
1255 | case MOUNT_UNMOUNTING_SIGTERM: | |
1256 | ||
7d54a03a LP |
1257 | if (f == MOUNT_SUCCESS) { |
1258 | ||
1259 | if (m->from_proc_self_mountinfo) { | |
1260 | ||
1261 | /* Still a mount point? If so, let's | |
1262 | * try again. Most likely there were | |
1263 | * multiple mount points stacked on | |
1264 | * top of each other. Note that due to | |
1265 | * the io event priority logic we can | |
1266 | * be sure the new mountinfo is loaded | |
1267 | * before we process the SIGCHLD for | |
1268 | * the mount command. */ | |
1269 | ||
1270 | if (m->n_retry_umount < RETRY_UMOUNT_MAX) { | |
1271 | log_unit_debug(u->id, "%s: mount still present, trying again.", u->id); | |
1272 | m->n_retry_umount++; | |
1273 | mount_enter_unmounting(m); | |
1274 | } else { | |
1275 | log_unit_debug(u->id, "%s: mount still present after %u attempts to unmount, giving up.", u->id, m->n_retry_umount); | |
1276 | mount_enter_mounted(m, f); | |
1277 | } | |
1278 | } else | |
1279 | mount_enter_dead(m, f); | |
1280 | ||
1281 | } else if (m->from_proc_self_mountinfo) | |
9d2f5178 | 1282 | mount_enter_mounted(m, f); |
e537352b | 1283 | else |
9d2f5178 | 1284 | mount_enter_dead(m, f); |
e537352b LP |
1285 | break; |
1286 | ||
1287 | default: | |
1288 | assert_not_reached("Uh, control process died at wrong time."); | |
1289 | } | |
c4e2ceae LP |
1290 | |
1291 | /* Notify clients about changed exit status */ | |
1292 | unit_add_to_dbus_queue(u); | |
e537352b LP |
1293 | } |
1294 | ||
718db961 LP |
1295 | static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
1296 | Mount *m = MOUNT(userdata); | |
e537352b LP |
1297 | |
1298 | assert(m); | |
718db961 | 1299 | assert(m->timer_event_source == source); |
e537352b LP |
1300 | |
1301 | switch (m->state) { | |
1302 | ||
1303 | case MOUNT_MOUNTING: | |
1304 | case MOUNT_MOUNTING_DONE: | |
79008bdd | 1305 | log_unit_warning(UNIT(m)->id, |
718db961 | 1306 | "%s mounting timed out. Stopping.", UNIT(m)->id); |
9d2f5178 | 1307 | mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT); |
e537352b LP |
1308 | break; |
1309 | ||
1310 | case MOUNT_REMOUNTING: | |
79008bdd | 1311 | log_unit_warning(UNIT(m)->id, |
718db961 | 1312 | "%s remounting timed out. Stopping.", UNIT(m)->id); |
9d2f5178 LP |
1313 | m->reload_result = MOUNT_FAILURE_TIMEOUT; |
1314 | mount_enter_mounted(m, MOUNT_SUCCESS); | |
e537352b LP |
1315 | break; |
1316 | ||
1317 | case MOUNT_UNMOUNTING: | |
79008bdd | 1318 | log_unit_warning(UNIT(m)->id, |
718db961 | 1319 | "%s unmounting timed out. Stopping.", UNIT(m)->id); |
9d2f5178 | 1320 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT); |
e537352b LP |
1321 | break; |
1322 | ||
1323 | case MOUNT_MOUNTING_SIGTERM: | |
4819ff03 | 1324 | if (m->kill_context.send_sigkill) { |
79008bdd | 1325 | log_unit_warning(UNIT(m)->id, |
718db961 | 1326 | "%s mounting timed out. Killing.", UNIT(m)->id); |
9d2f5178 | 1327 | mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1328 | } else { |
79008bdd | 1329 | log_unit_warning(UNIT(m)->id, |
66870f90 | 1330 | "%s mounting timed out. Skipping SIGKILL. Ignoring.", |
718db961 | 1331 | UNIT(m)->id); |
ba035df2 LP |
1332 | |
1333 | if (m->from_proc_self_mountinfo) | |
9d2f5178 | 1334 | mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1335 | else |
9d2f5178 | 1336 | mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1337 | } |
e537352b LP |
1338 | break; |
1339 | ||
1340 | case MOUNT_REMOUNTING_SIGTERM: | |
4819ff03 | 1341 | if (m->kill_context.send_sigkill) { |
79008bdd | 1342 | log_unit_warning(UNIT(m)->id, |
718db961 | 1343 | "%s remounting timed out. Killing.", UNIT(m)->id); |
9d2f5178 | 1344 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1345 | } else { |
79008bdd | 1346 | log_unit_warning(UNIT(m)->id, |
66870f90 | 1347 | "%s remounting timed out. Skipping SIGKILL. Ignoring.", |
718db961 | 1348 | UNIT(m)->id); |
ba035df2 LP |
1349 | |
1350 | if (m->from_proc_self_mountinfo) | |
9d2f5178 | 1351 | mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1352 | else |
9d2f5178 | 1353 | mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1354 | } |
e537352b LP |
1355 | break; |
1356 | ||
1357 | case MOUNT_UNMOUNTING_SIGTERM: | |
4819ff03 | 1358 | if (m->kill_context.send_sigkill) { |
79008bdd | 1359 | log_unit_warning(UNIT(m)->id, |
718db961 | 1360 | "%s unmounting timed out. Killing.", UNIT(m)->id); |
9d2f5178 | 1361 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1362 | } else { |
79008bdd | 1363 | log_unit_warning(UNIT(m)->id, |
66870f90 | 1364 | "%s unmounting timed out. Skipping SIGKILL. Ignoring.", |
718db961 | 1365 | UNIT(m)->id); |
ba035df2 LP |
1366 | |
1367 | if (m->from_proc_self_mountinfo) | |
9d2f5178 | 1368 | mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1369 | else |
9d2f5178 | 1370 | mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1371 | } |
e537352b LP |
1372 | break; |
1373 | ||
1374 | case MOUNT_MOUNTING_SIGKILL: | |
1375 | case MOUNT_REMOUNTING_SIGKILL: | |
1376 | case MOUNT_UNMOUNTING_SIGKILL: | |
79008bdd | 1377 | log_unit_warning(UNIT(m)->id, |
66870f90 | 1378 | "%s mount process still around after SIGKILL. Ignoring.", |
718db961 | 1379 | UNIT(m)->id); |
e537352b LP |
1380 | |
1381 | if (m->from_proc_self_mountinfo) | |
9d2f5178 | 1382 | mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT); |
e537352b | 1383 | else |
9d2f5178 | 1384 | mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT); |
e537352b LP |
1385 | break; |
1386 | ||
1387 | default: | |
1388 | assert_not_reached("Timeout at wrong time."); | |
1389 | } | |
718db961 LP |
1390 | |
1391 | return 0; | |
e537352b LP |
1392 | } |
1393 | ||
1394 | static int mount_add_one( | |
1395 | Manager *m, | |
1396 | const char *what, | |
1397 | const char *where, | |
1398 | const char *options, | |
1399 | const char *fstype, | |
e537352b | 1400 | bool set_flags) { |
057d9ab8 LP |
1401 | |
1402 | _cleanup_free_ char *e = NULL, *w = NULL, *o = NULL, *f = NULL; | |
b87705cd | 1403 | bool load_extras = false; |
057d9ab8 | 1404 | MountParameters *p; |
ff5f34d0 | 1405 | bool delete, changed = false; |
057d9ab8 LP |
1406 | Unit *u; |
1407 | int r; | |
b08d03ff | 1408 | |
f50e0a01 | 1409 | assert(m); |
b08d03ff LP |
1410 | assert(what); |
1411 | assert(where); | |
e537352b LP |
1412 | assert(options); |
1413 | assert(fstype); | |
1414 | ||
e537352b LP |
1415 | /* Ignore API mount points. They should never be referenced in |
1416 | * dependencies ever. */ | |
33ff02c9 | 1417 | if (mount_point_is_api(where) || mount_point_ignore(where)) |
57f2a956 | 1418 | return 0; |
b08d03ff | 1419 | |
8d567588 LP |
1420 | if (streq(fstype, "autofs")) |
1421 | return 0; | |
1422 | ||
4e85aff4 LP |
1423 | /* probably some kind of swap, ignore */ |
1424 | if (!is_path(where)) | |
b08d03ff LP |
1425 | return 0; |
1426 | ||
7d17cfbc MS |
1427 | e = unit_name_from_path(where, ".mount"); |
1428 | if (!e) | |
b08d03ff LP |
1429 | return -ENOMEM; |
1430 | ||
7d17cfbc MS |
1431 | u = manager_get_unit(m, e); |
1432 | if (!u) { | |
b08d03ff LP |
1433 | delete = true; |
1434 | ||
7d17cfbc | 1435 | u = unit_new(m, sizeof(Mount)); |
057d9ab8 | 1436 | if (!u) |
b08d03ff | 1437 | return -ENOMEM; |
b08d03ff LP |
1438 | |
1439 | r = unit_add_name(u, e); | |
b08d03ff LP |
1440 | if (r < 0) |
1441 | goto fail; | |
1442 | ||
7d17cfbc MS |
1443 | MOUNT(u)->where = strdup(where); |
1444 | if (!MOUNT(u)->where) { | |
07b0b134 ML |
1445 | r = -ENOMEM; |
1446 | goto fail; | |
1447 | } | |
f50e0a01 | 1448 | |
47a81ba2 UTL |
1449 | u->source_path = strdup("/proc/self/mountinfo"); |
1450 | if (!u->source_path) { | |
1451 | r = -ENOMEM; | |
1452 | goto fail; | |
1453 | } | |
1454 | ||
057d9ab8 LP |
1455 | if (m->running_as == SYSTEMD_SYSTEM) { |
1456 | const char* target; | |
1457 | ||
affc3d83 | 1458 | target = mount_needs_network(options, fstype) ? SPECIAL_REMOTE_FS_TARGET : SPECIAL_LOCAL_FS_TARGET; |
057d9ab8 | 1459 | r = unit_add_dependency_by_name(u, UNIT_BEFORE, target, NULL, true); |
602c0e74 LP |
1460 | if (r < 0) |
1461 | goto fail; | |
057d9ab8 LP |
1462 | |
1463 | if (should_umount(MOUNT(u))) { | |
1464 | r = unit_add_dependency_by_name(u, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true); | |
1465 | if (r < 0) | |
1466 | goto fail; | |
1467 | } | |
602c0e74 | 1468 | } |
89b1d5e0 | 1469 | |
f94ea366 | 1470 | unit_add_to_load_queue(u); |
ff5f34d0 | 1471 | changed = true; |
b08d03ff LP |
1472 | } else { |
1473 | delete = false; | |
8eba616f | 1474 | |
bcbd5405 WW |
1475 | if (!MOUNT(u)->where) { |
1476 | MOUNT(u)->where = strdup(where); | |
1477 | if (!MOUNT(u)->where) { | |
1478 | r = -ENOMEM; | |
1479 | goto fail; | |
1480 | } | |
1481 | } | |
1482 | ||
9d05dd2e ZJS |
1483 | if (m->running_as == SYSTEMD_SYSTEM && |
1484 | mount_needs_network(options, fstype)) { | |
a6d305f9 CL |
1485 | /* _netdev option may have shown up late, or on a |
1486 | * remount. Add remote-fs dependencies, even though | |
9d05dd2e ZJS |
1487 | * local-fs ones may already be there. */ |
1488 | unit_add_dependency_by_name(u, UNIT_BEFORE, SPECIAL_REMOTE_FS_TARGET, NULL, true); | |
1489 | load_extras = true; | |
a6d305f9 CL |
1490 | } |
1491 | ||
c2756a68 | 1492 | if (u->load_state == UNIT_NOT_FOUND) { |
8eba616f MS |
1493 | u->load_state = UNIT_LOADED; |
1494 | u->load_error = 0; | |
b87705cd LP |
1495 | |
1496 | /* Load in the extras later on, after we | |
1497 | * finished initialization of the unit */ | |
1498 | load_extras = true; | |
ff5f34d0 | 1499 | changed = true; |
8eba616f | 1500 | } |
b08d03ff LP |
1501 | } |
1502 | ||
dd7a22a9 LP |
1503 | w = strdup(what); |
1504 | o = strdup(options); | |
1505 | f = strdup(fstype); | |
1506 | if (!w || !o || !f) { | |
e537352b LP |
1507 | r = -ENOMEM; |
1508 | goto fail; | |
1509 | } | |
1510 | ||
6b1dc2bd | 1511 | p = &MOUNT(u)->parameters_proc_self_mountinfo; |
ff5f34d0 LP |
1512 | |
1513 | changed = changed || | |
1514 | !streq_ptr(p->options, options) || | |
1515 | !streq_ptr(p->what, what) || | |
1516 | !streq_ptr(p->fstype, fstype); | |
1517 | ||
6b1dc2bd LP |
1518 | if (set_flags) { |
1519 | MOUNT(u)->is_mounted = true; | |
1520 | MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo; | |
ff5f34d0 | 1521 | MOUNT(u)->just_changed = changed; |
ef734fd6 | 1522 | } |
f50e0a01 | 1523 | |
6b1dc2bd LP |
1524 | MOUNT(u)->from_proc_self_mountinfo = true; |
1525 | ||
4e85aff4 LP |
1526 | free(p->what); |
1527 | p->what = w; | |
057d9ab8 | 1528 | w = NULL; |
b08d03ff | 1529 | |
4e85aff4 LP |
1530 | free(p->options); |
1531 | p->options = o; | |
057d9ab8 | 1532 | o = NULL; |
e537352b | 1533 | |
4e85aff4 LP |
1534 | free(p->fstype); |
1535 | p->fstype = f; | |
057d9ab8 | 1536 | f = NULL; |
b08d03ff | 1537 | |
b87705cd LP |
1538 | if (load_extras) { |
1539 | r = mount_add_extras(MOUNT(u)); | |
1540 | if (r < 0) | |
1541 | goto fail; | |
1542 | } | |
1543 | ||
ff5f34d0 LP |
1544 | if (changed) |
1545 | unit_add_to_dbus_queue(u); | |
c1e1601e | 1546 | |
b08d03ff LP |
1547 | return 0; |
1548 | ||
1549 | fail: | |
1550 | if (delete && u) | |
1551 | unit_free(u); | |
1552 | ||
4e85aff4 | 1553 | return r; |
b08d03ff LP |
1554 | } |
1555 | ||
ef734fd6 | 1556 | static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { |
4e920142 ZJS |
1557 | _cleanup_(mnt_free_tablep) struct libmnt_table *tb = NULL; |
1558 | _cleanup_(mnt_free_iterp) struct libmnt_iter *itr = NULL; | |
8d3ae2bd | 1559 | struct libmnt_fs *fs; |
60b912f6 | 1560 | int r = 0; |
b08d03ff LP |
1561 | |
1562 | assert(m); | |
1563 | ||
8d3ae2bd CL |
1564 | tb = mnt_new_table(); |
1565 | itr = mnt_new_iter(MNT_ITER_FORWARD); | |
1566 | if (!tb || !itr) | |
1567 | return log_oom(); | |
b08d03ff | 1568 | |
5cca8def ZJS |
1569 | r = mnt_table_parse_mtab(tb, NULL); |
1570 | if (r < 0) | |
8d3ae2bd | 1571 | return r; |
e537352b | 1572 | |
5cca8def ZJS |
1573 | r = 0; |
1574 | for (;;) { | |
8d3ae2bd CL |
1575 | const char *device, *path, *options, *fstype; |
1576 | _cleanup_free_ const char *d = NULL, *p = NULL; | |
1577 | int k; | |
b08d03ff | 1578 | |
5cca8def ZJS |
1579 | k = mnt_table_next_fs(tb, itr, &fs); |
1580 | if (k == 1) | |
1581 | break; | |
1582 | else if (k < 0) | |
1583 | return log_error_errno(k, "Failed to get next entry from /etc/fstab: %m"); | |
1584 | ||
8d3ae2bd CL |
1585 | device = mnt_fs_get_source(fs); |
1586 | path = mnt_fs_get_target(fs); | |
1587 | options = mnt_fs_get_options(fs); | |
1588 | fstype = mnt_fs_get_fstype(fs); | |
a2e0f3d3 | 1589 | |
a57f7e2c LP |
1590 | d = cunescape(device); |
1591 | p = cunescape(path); | |
1592 | if (!d || !p) | |
1593 | return log_oom(); | |
b08d03ff | 1594 | |
8d3ae2bd | 1595 | k = mount_add_one(m, d, p, options, fstype, set_flags); |
5cca8def | 1596 | if (r == 0 && k < 0) |
60b912f6 | 1597 | r = k; |
b08d03ff LP |
1598 | } |
1599 | ||
e537352b LP |
1600 | return r; |
1601 | } | |
1602 | ||
1603 | static void mount_shutdown(Manager *m) { | |
1604 | assert(m); | |
1605 | ||
718db961 | 1606 | m->mount_event_source = sd_event_source_unref(m->mount_event_source); |
befb6d54 | 1607 | m->mount_utab_event_source = sd_event_source_unref(m->mount_utab_event_source); |
718db961 | 1608 | |
a16e1123 | 1609 | if (m->proc_self_mountinfo) { |
e537352b | 1610 | fclose(m->proc_self_mountinfo); |
a16e1123 LP |
1611 | m->proc_self_mountinfo = NULL; |
1612 | } | |
befb6d54 | 1613 | m->utab_inotify_fd = safe_close(m->utab_inotify_fd); |
b08d03ff LP |
1614 | } |
1615 | ||
68db7a3b ZJS |
1616 | static int mount_get_timeout(Unit *u, uint64_t *timeout) { |
1617 | Mount *m = MOUNT(u); | |
1618 | int r; | |
1619 | ||
1620 | if (!m->timer_event_source) | |
1621 | return 0; | |
1622 | ||
1623 | r = sd_event_source_get_time(m->timer_event_source, timeout); | |
1624 | if (r < 0) | |
1625 | return r; | |
1626 | ||
1627 | return 1; | |
1628 | } | |
1629 | ||
b08d03ff LP |
1630 | static int mount_enumerate(Manager *m) { |
1631 | int r; | |
1632 | assert(m); | |
1633 | ||
8d3ae2bd CL |
1634 | mnt_init_debug(0); |
1635 | ||
a16e1123 | 1636 | if (!m->proc_self_mountinfo) { |
e62d8c39 ZJS |
1637 | m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re"); |
1638 | if (!m->proc_self_mountinfo) | |
a16e1123 | 1639 | return -errno; |
ef734fd6 | 1640 | |
151b9b96 | 1641 | r = sd_event_add_io(m->event, &m->mount_event_source, fileno(m->proc_self_mountinfo), EPOLLPRI, mount_dispatch_io, m); |
718db961 LP |
1642 | if (r < 0) |
1643 | goto fail; | |
29083707 LP |
1644 | |
1645 | /* Dispatch this before we dispatch SIGCHLD, so that | |
1646 | * we always get the events from /proc/self/mountinfo | |
1647 | * before the SIGCHLD of /bin/mount. */ | |
1648 | r = sd_event_source_set_priority(m->mount_event_source, -10); | |
1649 | if (r < 0) | |
1650 | goto fail; | |
a16e1123 | 1651 | } |
ef734fd6 | 1652 | |
befb6d54 CL |
1653 | if (m->utab_inotify_fd < 0) { |
1654 | m->utab_inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); | |
f7c1ad4f LP |
1655 | if (m->utab_inotify_fd < 0) { |
1656 | r = -errno; | |
1657 | goto fail; | |
1658 | } | |
befb6d54 | 1659 | |
90598531 ZJS |
1660 | (void) mkdir_p_label("/run/mount", 0755); |
1661 | ||
befb6d54 | 1662 | r = inotify_add_watch(m->utab_inotify_fd, "/run/mount", IN_MOVED_TO); |
f7c1ad4f LP |
1663 | if (r < 0) { |
1664 | r = -errno; | |
1665 | goto fail; | |
1666 | } | |
befb6d54 CL |
1667 | |
1668 | r = sd_event_add_io(m->event, &m->mount_utab_event_source, m->utab_inotify_fd, EPOLLIN, mount_dispatch_io, m); | |
1669 | if (r < 0) | |
1670 | goto fail; | |
1671 | ||
1672 | r = sd_event_source_set_priority(m->mount_utab_event_source, -10); | |
1673 | if (r < 0) | |
1674 | goto fail; | |
1675 | } | |
1676 | ||
e62d8c39 ZJS |
1677 | r = mount_load_proc_self_mountinfo(m, false); |
1678 | if (r < 0) | |
b08d03ff LP |
1679 | goto fail; |
1680 | ||
1681 | return 0; | |
1682 | ||
1683 | fail: | |
1684 | mount_shutdown(m); | |
1685 | return r; | |
5cb5a6ff LP |
1686 | } |
1687 | ||
718db961 LP |
1688 | static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
1689 | Manager *m = userdata; | |
595ed347 | 1690 | Unit *u; |
ef734fd6 LP |
1691 | int r; |
1692 | ||
1693 | assert(m); | |
befb6d54 | 1694 | assert(revents & (EPOLLPRI | EPOLLIN)); |
ef734fd6 LP |
1695 | |
1696 | /* The manager calls this for every fd event happening on the | |
1697 | * /proc/self/mountinfo file, which informs us about mounting | |
fddf1a31 ZJS |
1698 | * table changes, and for /run/mount events which we watch |
1699 | * for mount options. */ | |
befb6d54 CL |
1700 | |
1701 | if (fd == m->utab_inotify_fd) { | |
df63dda6 | 1702 | bool rescan = false; |
befb6d54 | 1703 | |
b7307642 LP |
1704 | /* FIXME: We *really* need to replace this with |
1705 | * libmount's own API for this, we should not hardcode | |
1706 | * internal behaviour of libmount here. */ | |
1707 | ||
f7c1ad4f | 1708 | for (;;) { |
0254e944 | 1709 | union inotify_event_buffer buffer; |
f7c1ad4f LP |
1710 | struct inotify_event *e; |
1711 | ssize_t l; | |
1712 | ||
0254e944 | 1713 | l = read(fd, &buffer, sizeof(buffer)); |
f7c1ad4f LP |
1714 | if (l < 0) { |
1715 | if (errno == EAGAIN || errno == EINTR) | |
1716 | break; | |
1717 | ||
1718 | log_error_errno(errno, "Failed to read utab inotify: %m"); | |
1719 | break; | |
1720 | } | |
1721 | ||
1722 | FOREACH_INOTIFY_EVENT(e, buffer, l) { | |
1723 | /* Only care about changes to utab, | |
1724 | * but we have to monitor the | |
1725 | * directory to reliably get | |
1726 | * notifications about when utab is | |
1727 | * replaced using rename(2) */ | |
1728 | if ((e->mask & IN_Q_OVERFLOW) || streq(e->name, "utab")) | |
df63dda6 | 1729 | rescan = true; |
befb6d54 | 1730 | } |
f7c1ad4f | 1731 | } |
fddf1a31 | 1732 | |
befb6d54 CL |
1733 | if (!rescan) |
1734 | return 0; | |
1735 | } | |
ef734fd6 | 1736 | |
4f0eedb7 ZJS |
1737 | r = mount_load_proc_self_mountinfo(m, true); |
1738 | if (r < 0) { | |
da927ba9 | 1739 | log_error_errno(r, "Failed to reread /proc/self/mountinfo: %m"); |
e537352b LP |
1740 | |
1741 | /* Reset flags, just in case, for later calls */ | |
595ed347 MS |
1742 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) { |
1743 | Mount *mount = MOUNT(u); | |
e537352b LP |
1744 | |
1745 | mount->is_mounted = mount->just_mounted = mount->just_changed = false; | |
1746 | } | |
1747 | ||
718db961 | 1748 | return 0; |
ef734fd6 LP |
1749 | } |
1750 | ||
1751 | manager_dispatch_load_queue(m); | |
1752 | ||
595ed347 MS |
1753 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) { |
1754 | Mount *mount = MOUNT(u); | |
ef734fd6 | 1755 | |
e537352b | 1756 | if (!mount->is_mounted) { |
e537352b | 1757 | |
ef734fd6 | 1758 | mount->from_proc_self_mountinfo = false; |
e537352b LP |
1759 | |
1760 | switch (mount->state) { | |
1761 | ||
1762 | case MOUNT_MOUNTED: | |
aef83136 LP |
1763 | /* This has just been unmounted by |
1764 | * somebody else, follow the state | |
1765 | * change. */ | |
9d2f5178 | 1766 | mount_enter_dead(mount, MOUNT_SUCCESS); |
e537352b LP |
1767 | break; |
1768 | ||
1769 | default: | |
e537352b | 1770 | break; |
e537352b LP |
1771 | } |
1772 | ||
1773 | } else if (mount->just_mounted || mount->just_changed) { | |
1774 | ||
60b912f6 | 1775 | /* New or changed mount entry */ |
e537352b LP |
1776 | |
1777 | switch (mount->state) { | |
1778 | ||
1779 | case MOUNT_DEAD: | |
fdf20a31 | 1780 | case MOUNT_FAILED: |
aef83136 LP |
1781 | /* This has just been mounted by |
1782 | * somebody else, follow the state | |
1783 | * change. */ | |
9d2f5178 | 1784 | mount_enter_mounted(mount, MOUNT_SUCCESS); |
e537352b LP |
1785 | break; |
1786 | ||
1787 | case MOUNT_MOUNTING: | |
5bcb0f2b | 1788 | mount_set_state(mount, MOUNT_MOUNTING_DONE); |
e537352b LP |
1789 | break; |
1790 | ||
1791 | default: | |
1792 | /* Nothing really changed, but let's | |
1793 | * issue an notification call | |
1794 | * nonetheless, in case somebody is | |
1795 | * waiting for this. (e.g. file system | |
1796 | * ro/rw remounts.) */ | |
1797 | mount_set_state(mount, mount->state); | |
1798 | break; | |
1799 | } | |
1800 | } | |
1801 | ||
1802 | /* Reset the flags for later calls */ | |
1803 | mount->is_mounted = mount->just_mounted = mount->just_changed = false; | |
1804 | } | |
718db961 LP |
1805 | |
1806 | return 0; | |
e537352b LP |
1807 | } |
1808 | ||
fdf20a31 | 1809 | static void mount_reset_failed(Unit *u) { |
5632e374 LP |
1810 | Mount *m = MOUNT(u); |
1811 | ||
1812 | assert(m); | |
1813 | ||
fdf20a31 | 1814 | if (m->state == MOUNT_FAILED) |
5632e374 LP |
1815 | mount_set_state(m, MOUNT_DEAD); |
1816 | ||
9d2f5178 LP |
1817 | m->result = MOUNT_SUCCESS; |
1818 | m->reload_result = MOUNT_SUCCESS; | |
5632e374 LP |
1819 | } |
1820 | ||
718db961 | 1821 | static int mount_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { |
814cc562 | 1822 | return unit_kill_common(u, who, signo, -1, MOUNT(u)->control_pid, error); |
8a0867d6 LP |
1823 | } |
1824 | ||
a16e1123 LP |
1825 | static const char* const mount_state_table[_MOUNT_STATE_MAX] = { |
1826 | [MOUNT_DEAD] = "dead", | |
1827 | [MOUNT_MOUNTING] = "mounting", | |
1828 | [MOUNT_MOUNTING_DONE] = "mounting-done", | |
1829 | [MOUNT_MOUNTED] = "mounted", | |
1830 | [MOUNT_REMOUNTING] = "remounting", | |
1831 | [MOUNT_UNMOUNTING] = "unmounting", | |
1832 | [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm", | |
1833 | [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill", | |
1834 | [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm", | |
1835 | [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill", | |
1836 | [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm", | |
1837 | [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill", | |
fdf20a31 | 1838 | [MOUNT_FAILED] = "failed" |
a16e1123 LP |
1839 | }; |
1840 | ||
1841 | DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState); | |
1842 | ||
1843 | static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = { | |
1844 | [MOUNT_EXEC_MOUNT] = "ExecMount", | |
1845 | [MOUNT_EXEC_UNMOUNT] = "ExecUnmount", | |
1846 | [MOUNT_EXEC_REMOUNT] = "ExecRemount", | |
1847 | }; | |
1848 | ||
1849 | DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand); | |
1850 | ||
9d2f5178 LP |
1851 | static const char* const mount_result_table[_MOUNT_RESULT_MAX] = { |
1852 | [MOUNT_SUCCESS] = "success", | |
1853 | [MOUNT_FAILURE_RESOURCES] = "resources", | |
1854 | [MOUNT_FAILURE_TIMEOUT] = "timeout", | |
1855 | [MOUNT_FAILURE_EXIT_CODE] = "exit-code", | |
1856 | [MOUNT_FAILURE_SIGNAL] = "signal", | |
1857 | [MOUNT_FAILURE_CORE_DUMP] = "core-dump" | |
1858 | }; | |
1859 | ||
1860 | DEFINE_STRING_TABLE_LOOKUP(mount_result, MountResult); | |
1861 | ||
87f0e418 | 1862 | const UnitVTable mount_vtable = { |
7d17cfbc | 1863 | .object_size = sizeof(Mount), |
718db961 LP |
1864 | .exec_context_offset = offsetof(Mount, exec_context), |
1865 | .cgroup_context_offset = offsetof(Mount, cgroup_context), | |
1866 | .kill_context_offset = offsetof(Mount, kill_context), | |
613b411c | 1867 | .exec_runtime_offset = offsetof(Mount, exec_runtime), |
3ef63c31 | 1868 | |
f975e971 LP |
1869 | .sections = |
1870 | "Unit\0" | |
1871 | "Mount\0" | |
1872 | "Install\0", | |
4ad49000 | 1873 | .private_section = "Mount", |
71645aca | 1874 | |
e537352b | 1875 | .no_alias = true, |
9e2f7c11 | 1876 | .no_instances = true, |
e537352b LP |
1877 | |
1878 | .init = mount_init, | |
1879 | .load = mount_load, | |
034c6ed7 | 1880 | .done = mount_done, |
e537352b | 1881 | |
f50e0a01 LP |
1882 | .coldplug = mount_coldplug, |
1883 | ||
034c6ed7 | 1884 | .dump = mount_dump, |
5cb5a6ff | 1885 | |
e537352b LP |
1886 | .start = mount_start, |
1887 | .stop = mount_stop, | |
1888 | .reload = mount_reload, | |
1889 | ||
8a0867d6 LP |
1890 | .kill = mount_kill, |
1891 | ||
a16e1123 LP |
1892 | .serialize = mount_serialize, |
1893 | .deserialize_item = mount_deserialize_item, | |
1894 | ||
f50e0a01 | 1895 | .active_state = mount_active_state, |
10a94420 | 1896 | .sub_state_to_string = mount_sub_state_to_string, |
b08d03ff | 1897 | |
701cc384 LP |
1898 | .check_gc = mount_check_gc, |
1899 | ||
e537352b | 1900 | .sigchld_event = mount_sigchld_event, |
e537352b | 1901 | |
fdf20a31 | 1902 | .reset_failed = mount_reset_failed, |
5632e374 | 1903 | |
c4e2ceae | 1904 | .bus_interface = "org.freedesktop.systemd1.Mount", |
718db961 | 1905 | .bus_vtable = bus_mount_vtable, |
74c964d3 LP |
1906 | .bus_set_property = bus_mount_set_property, |
1907 | .bus_commit_properties = bus_mount_commit_properties, | |
4139c1b2 | 1908 | |
68db7a3b ZJS |
1909 | .get_timeout = mount_get_timeout, |
1910 | ||
0e252f6b TG |
1911 | .can_transient = true, |
1912 | ||
f50e0a01 | 1913 | .enumerate = mount_enumerate, |
c6918296 MS |
1914 | .shutdown = mount_shutdown, |
1915 | ||
1916 | .status_message_formats = { | |
1917 | .starting_stopping = { | |
1918 | [0] = "Mounting %s...", | |
1919 | [1] = "Unmounting %s...", | |
1920 | }, | |
1921 | .finished_start_job = { | |
1922 | [JOB_DONE] = "Mounted %s.", | |
1923 | [JOB_FAILED] = "Failed to mount %s.", | |
1924 | [JOB_DEPENDENCY] = "Dependency failed for %s.", | |
1925 | [JOB_TIMEOUT] = "Timed out mounting %s.", | |
1926 | }, | |
1927 | .finished_stop_job = { | |
1928 | [JOB_DONE] = "Unmounted %s.", | |
1929 | [JOB_FAILED] = "Failed unmounting %s.", | |
1930 | [JOB_TIMEOUT] = "Timed out unmounting %s.", | |
1931 | }, | |
1932 | }, | |
5cb5a6ff | 1933 | }; |