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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> |
4f5dd394 | 23 | #include <signal.h> |
b08d03ff | 24 | #include <stdio.h> |
ef734fd6 | 25 | #include <sys/epoll.h> |
5cb5a6ff | 26 | |
20ad4cfd | 27 | #include "sd-messages.h" |
4f5dd394 | 28 | |
b5efdb8a | 29 | #include "alloc-util.h" |
4139c1b2 | 30 | #include "dbus-mount.h" |
4f5dd394 | 31 | #include "escape.h" |
9a57c629 | 32 | #include "exit-status.h" |
6482f626 | 33 | #include "formats-util.h" |
4f5dd394 LP |
34 | #include "fstab-util.h" |
35 | #include "log.h" | |
36 | #include "manager.h" | |
37 | #include "mkdir.h" | |
38 | #include "mount-setup.h" | |
4e036b7a | 39 | #include "mount-util.h" |
4f5dd394 | 40 | #include "mount.h" |
6bedfcbb | 41 | #include "parse-util.h" |
4f5dd394 | 42 | #include "path-util.h" |
7b3e062c | 43 | #include "process-util.h" |
46a01aba | 44 | #include "smack-util.h" |
4f5dd394 | 45 | #include "special.h" |
8b43440b | 46 | #include "string-table.h" |
b5efdb8a | 47 | #include "string-util.h" |
4f5dd394 LP |
48 | #include "strv.h" |
49 | #include "unit-name.h" | |
50 | #include "unit.h" | |
5cb5a6ff | 51 | |
7d54a03a LP |
52 | #define RETRY_UMOUNT_MAX 32 |
53 | ||
4e920142 ZJS |
54 | DEFINE_TRIVIAL_CLEANUP_FUNC(struct libmnt_table*, mnt_free_table); |
55 | DEFINE_TRIVIAL_CLEANUP_FUNC(struct libmnt_iter*, mnt_free_iter); | |
56 | ||
f50e0a01 LP |
57 | static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = { |
58 | [MOUNT_DEAD] = UNIT_INACTIVE, | |
59 | [MOUNT_MOUNTING] = UNIT_ACTIVATING, | |
e537352b | 60 | [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE, |
f50e0a01 | 61 | [MOUNT_MOUNTED] = UNIT_ACTIVE, |
032ff4af | 62 | [MOUNT_REMOUNTING] = UNIT_RELOADING, |
f50e0a01 | 63 | [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING, |
e537352b LP |
64 | [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING, |
65 | [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING, | |
032ff4af LP |
66 | [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING, |
67 | [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING, | |
e537352b LP |
68 | [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING, |
69 | [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING, | |
fdf20a31 | 70 | [MOUNT_FAILED] = UNIT_FAILED |
f50e0a01 | 71 | }; |
5cb5a6ff | 72 | |
718db961 LP |
73 | static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); |
74 | static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); | |
75 | ||
affc3d83 | 76 | static bool mount_needs_network(const char *options, const char *fstype) { |
d15d0333 | 77 | if (fstab_test_option(options, "_netdev\0")) |
fc676b00 ZJS |
78 | return true; |
79 | ||
affc3d83 | 80 | if (fstype && fstype_is_network(fstype)) |
fc676b00 ZJS |
81 | return true; |
82 | ||
83 | return false; | |
84 | } | |
85 | ||
e6a7b9f4 | 86 | static bool mount_is_network(const MountParameters *p) { |
affc3d83 CL |
87 | assert(p); |
88 | ||
89 | return mount_needs_network(p->options, p->fstype); | |
90 | } | |
91 | ||
e6a7b9f4 | 92 | static bool mount_is_bind(const MountParameters *p) { |
fc676b00 ZJS |
93 | assert(p); |
94 | ||
d15d0333 | 95 | if (fstab_test_option(p->options, "bind\0" "rbind\0")) |
fc676b00 ZJS |
96 | return true; |
97 | ||
d15d0333 | 98 | if (p->fstype && STR_IN_SET(p->fstype, "bind", "rbind")) |
fc676b00 ZJS |
99 | return true; |
100 | ||
101 | return false; | |
102 | } | |
103 | ||
e6a7b9f4 | 104 | static bool mount_is_auto(const MountParameters *p) { |
fc676b00 ZJS |
105 | assert(p); |
106 | ||
d15d0333 | 107 | return !fstab_test_option(p->options, "noauto\0"); |
fc676b00 ZJS |
108 | } |
109 | ||
e6a7b9f4 | 110 | static bool needs_quota(const MountParameters *p) { |
fc676b00 ZJS |
111 | assert(p); |
112 | ||
11041c84 | 113 | /* Quotas are not enabled on network filesystems, |
340a1d23 | 114 | * but we want them, for example, on storage connected via iscsi */ |
11041c84 | 115 | if (p->fstype && fstype_is_network(p->fstype)) |
fc676b00 ZJS |
116 | return false; |
117 | ||
118 | if (mount_is_bind(p)) | |
119 | return false; | |
120 | ||
d15d0333 ZJS |
121 | return fstab_test_option(p->options, |
122 | "usrquota\0" "grpquota\0" "quota\0" "usrjquota\0" "grpjquota\0"); | |
fc676b00 ZJS |
123 | } |
124 | ||
a16e1123 LP |
125 | static void mount_init(Unit *u) { |
126 | Mount *m = MOUNT(u); | |
5cb5a6ff | 127 | |
a16e1123 | 128 | assert(u); |
ac155bb8 | 129 | assert(u->load_state == UNIT_STUB); |
a16e1123 | 130 | |
1f19a534 | 131 | m->timeout_usec = u->manager->default_timeout_start_usec; |
3e5235b0 LP |
132 | m->directory_mode = 0755; |
133 | ||
6b1dc2bd LP |
134 | if (unit_has_name(u, "-.mount")) { |
135 | /* Don't allow start/stop for root directory */ | |
5bcb0f2b LP |
136 | u->refuse_manual_start = true; |
137 | u->refuse_manual_stop = true; | |
6b1dc2bd LP |
138 | } else { |
139 | /* The stdio/kmsg bridge socket is on /, in order to avoid a | |
140 | * dep loop, don't use kmsg logging for -.mount */ | |
ac155bb8 MS |
141 | m->exec_context.std_output = u->manager->default_std_output; |
142 | m->exec_context.std_error = u->manager->default_std_error; | |
f6cebb3b | 143 | } |
c3686083 | 144 | |
f00929ad DJL |
145 | /* We need to make sure that /usr/bin/mount is always called |
146 | * in the same process group as us, so that the autofs kernel | |
a16e1123 LP |
147 | * side doesn't send us another mount request while we are |
148 | * already trying to comply its last one. */ | |
74922904 | 149 | m->exec_context.same_pgrp = true; |
8d567588 | 150 | |
a16e1123 | 151 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; |
c8f4d764 | 152 | |
5bcb0f2b | 153 | u->ignore_on_isolate = true; |
8d567588 LP |
154 | } |
155 | ||
718db961 LP |
156 | static int mount_arm_timer(Mount *m) { |
157 | int r; | |
158 | ||
159 | assert(m); | |
160 | ||
161 | if (m->timeout_usec <= 0) { | |
162 | m->timer_event_source = sd_event_source_unref(m->timer_event_source); | |
163 | return 0; | |
164 | } | |
165 | ||
166 | if (m->timer_event_source) { | |
167 | r = sd_event_source_set_time(m->timer_event_source, now(CLOCK_MONOTONIC) + m->timeout_usec); | |
168 | if (r < 0) | |
169 | return r; | |
170 | ||
171 | return sd_event_source_set_enabled(m->timer_event_source, SD_EVENT_ONESHOT); | |
172 | } | |
173 | ||
7dfbe2e3 | 174 | r = sd_event_add_time( |
6a0f1f6d LP |
175 | UNIT(m)->manager->event, |
176 | &m->timer_event_source, | |
177 | CLOCK_MONOTONIC, | |
178 | now(CLOCK_MONOTONIC) + m->timeout_usec, 0, | |
179 | mount_dispatch_timer, m); | |
7dfbe2e3 TG |
180 | if (r < 0) |
181 | return r; | |
182 | ||
183 | (void) sd_event_source_set_description(m->timer_event_source, "mount-timer"); | |
184 | ||
185 | return 0; | |
718db961 LP |
186 | } |
187 | ||
a16e1123 | 188 | static void mount_unwatch_control_pid(Mount *m) { |
5e94833f LP |
189 | assert(m); |
190 | ||
191 | if (m->control_pid <= 0) | |
192 | return; | |
193 | ||
194 | unit_unwatch_pid(UNIT(m), m->control_pid); | |
195 | m->control_pid = 0; | |
196 | } | |
197 | ||
e537352b LP |
198 | static void mount_parameters_done(MountParameters *p) { |
199 | assert(p); | |
200 | ||
201 | free(p->what); | |
202 | free(p->options); | |
203 | free(p->fstype); | |
204 | ||
205 | p->what = p->options = p->fstype = NULL; | |
206 | } | |
207 | ||
87f0e418 | 208 | static void mount_done(Unit *u) { |
ef734fd6 | 209 | Mount *m = MOUNT(u); |
034c6ed7 | 210 | |
ef734fd6 | 211 | assert(m); |
034c6ed7 | 212 | |
a1e58e8e | 213 | m->where = mfree(m->where); |
7cb48925 | 214 | m->smack_fs_root_label = mfree(m->smack_fs_root_label); |
f50e0a01 | 215 | |
e537352b LP |
216 | mount_parameters_done(&m->parameters_proc_self_mountinfo); |
217 | mount_parameters_done(&m->parameters_fragment); | |
ef734fd6 | 218 | |
613b411c | 219 | m->exec_runtime = exec_runtime_unref(m->exec_runtime); |
e537352b LP |
220 | exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX); |
221 | m->control_command = NULL; | |
f50e0a01 | 222 | |
a16e1123 | 223 | mount_unwatch_control_pid(m); |
f50e0a01 | 224 | |
718db961 | 225 | m->timer_event_source = sd_event_source_unref(m->timer_event_source); |
f50e0a01 LP |
226 | } |
227 | ||
44a6b1b6 | 228 | _pure_ static MountParameters* get_mount_parameters_fragment(Mount *m) { |
cb39ed3f LP |
229 | assert(m); |
230 | ||
231 | if (m->from_fragment) | |
232 | return &m->parameters_fragment; | |
cb39ed3f LP |
233 | |
234 | return NULL; | |
235 | } | |
236 | ||
44a6b1b6 | 237 | _pure_ static MountParameters* get_mount_parameters(Mount *m) { |
cb39ed3f LP |
238 | assert(m); |
239 | ||
240 | if (m->from_proc_self_mountinfo) | |
241 | return &m->parameters_proc_self_mountinfo; | |
242 | ||
6b1dc2bd | 243 | return get_mount_parameters_fragment(m); |
cb39ed3f LP |
244 | } |
245 | ||
6e2ef85b | 246 | static int mount_add_mount_links(Mount *m) { |
a57f7e2c | 247 | _cleanup_free_ char *parent = NULL; |
5c78d8e2 | 248 | MountParameters *pm; |
ac155bb8 | 249 | Unit *other; |
a57f7e2c LP |
250 | Iterator i; |
251 | Set *s; | |
b08d03ff LP |
252 | int r; |
253 | ||
6e2ef85b | 254 | assert(m); |
b08d03ff | 255 | |
a57f7e2c LP |
256 | if (!path_equal(m->where, "/")) { |
257 | /* Adds in links to other mount points that might lie further | |
258 | * up in the hierarchy */ | |
5f311f8c LP |
259 | |
260 | parent = dirname_malloc(m->where); | |
261 | if (!parent) | |
262 | return -ENOMEM; | |
01f78473 | 263 | |
a57f7e2c | 264 | r = unit_require_mounts_for(UNIT(m), parent); |
4f0eedb7 | 265 | if (r < 0) |
01f78473 | 266 | return r; |
4f0eedb7 | 267 | } |
01f78473 | 268 | |
a57f7e2c LP |
269 | /* Adds in links to other mount points that might be needed |
270 | * for the source path (if this is a bind mount) to be | |
271 | * available. */ | |
272 | pm = get_mount_parameters_fragment(m); | |
fc676b00 ZJS |
273 | if (pm && pm->what && |
274 | path_is_absolute(pm->what) && | |
275 | !mount_is_network(pm)) { | |
276 | ||
a57f7e2c | 277 | r = unit_require_mounts_for(UNIT(m), pm->what); |
4f0eedb7 | 278 | if (r < 0) |
6e2ef85b | 279 | return r; |
4f0eedb7 | 280 | } |
b08d03ff | 281 | |
a57f7e2c LP |
282 | /* Adds in links to other units that use this path or paths |
283 | * further down in the hierarchy */ | |
284 | s = manager_get_units_requiring_mounts_for(UNIT(m)->manager, m->where); | |
285 | SET_FOREACH(other, s, i) { | |
b08d03ff | 286 | |
a57f7e2c LP |
287 | if (other->load_state != UNIT_LOADED) |
288 | continue; | |
b08d03ff | 289 | |
a57f7e2c LP |
290 | if (other == UNIT(m)) |
291 | continue; | |
b08d03ff | 292 | |
a57f7e2c | 293 | r = unit_add_dependency(other, UNIT_AFTER, UNIT(m), true); |
4f0eedb7 | 294 | if (r < 0) |
6e2ef85b | 295 | return r; |
b08d03ff | 296 | |
a57f7e2c LP |
297 | if (UNIT(m)->fragment_path) { |
298 | /* If we have fragment configuration, then make this dependency required */ | |
299 | r = unit_add_dependency(other, UNIT_REQUIRES, UNIT(m), true); | |
300 | if (r < 0) | |
301 | return r; | |
302 | } | |
7c8fa05c LP |
303 | } |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
173a8d04 LP |
308 | static int mount_add_device_links(Mount *m) { |
309 | MountParameters *p; | |
5073f89f | 310 | bool device_wants_mount = false; |
9fff8a1f | 311 | int r; |
173a8d04 LP |
312 | |
313 | assert(m); | |
314 | ||
06e97888 | 315 | p = get_mount_parameters(m); |
6b1dc2bd | 316 | if (!p) |
173a8d04 LP |
317 | return 0; |
318 | ||
9fff8a1f | 319 | if (!p->what) |
173a8d04 | 320 | return 0; |
5c78d8e2 | 321 | |
dd144c63 LP |
322 | if (mount_is_bind(p)) |
323 | return 0; | |
324 | ||
325 | if (!is_device_path(p->what)) | |
326 | return 0; | |
327 | ||
7ba2711d LP |
328 | /* /dev/root is a really weird thing, it's not a real device, |
329 | * but just a path the kernel exports for the root file system | |
330 | * specified on the kernel command line. Ignore it here. */ | |
331 | if (path_equal(p->what, "/dev/root")) | |
332 | return 0; | |
333 | ||
dd144c63 LP |
334 | if (path_equal(m->where, "/")) |
335 | return 0; | |
336 | ||
b2c23da8 | 337 | if (mount_is_auto(p) && UNIT(m)->manager->running_as == MANAGER_SYSTEM) |
5073f89f TG |
338 | device_wants_mount = true; |
339 | ||
340 | r = unit_add_node_link(UNIT(m), p->what, device_wants_mount); | |
dd144c63 LP |
341 | if (r < 0) |
342 | return r; | |
9fff8a1f | 343 | |
9fff8a1f | 344 | return 0; |
173a8d04 LP |
345 | } |
346 | ||
6b1dc2bd LP |
347 | static int mount_add_quota_links(Mount *m) { |
348 | int r; | |
349 | MountParameters *p; | |
350 | ||
351 | assert(m); | |
352 | ||
b2c23da8 | 353 | if (UNIT(m)->manager->running_as != MANAGER_SYSTEM) |
6b1dc2bd LP |
354 | return 0; |
355 | ||
356 | p = get_mount_parameters_fragment(m); | |
357 | if (!p) | |
358 | return 0; | |
359 | ||
360 | if (!needs_quota(p)) | |
361 | return 0; | |
362 | ||
363 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true); | |
364 | if (r < 0) | |
365 | return r; | |
366 | ||
367 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true); | |
368 | if (r < 0) | |
369 | return r; | |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
88ac30a1 TG |
374 | static bool should_umount(Mount *m) { |
375 | MountParameters *p; | |
376 | ||
377 | if (path_equal(m->where, "/") || | |
378 | path_equal(m->where, "/usr")) | |
379 | return false; | |
380 | ||
381 | p = get_mount_parameters(m); | |
d15d0333 | 382 | if (p && fstab_test_option(p->options, "x-initrd.mount\0") && |
88ac30a1 TG |
383 | !in_initrd()) |
384 | return false; | |
385 | ||
386 | return true; | |
387 | } | |
388 | ||
2edd4434 | 389 | static int mount_add_default_dependencies(Mount *m) { |
0c17fbce | 390 | const char *after, *after2, *online; |
9ddc4a26 | 391 | MountParameters *p; |
0c17fbce | 392 | int r; |
2edd4434 LP |
393 | |
394 | assert(m); | |
395 | ||
4c9ea260 LP |
396 | if (!UNIT(m)->default_dependencies) |
397 | return 0; | |
398 | ||
b2c23da8 | 399 | if (UNIT(m)->manager->running_as != MANAGER_SYSTEM) |
9ddc4a26 | 400 | return 0; |
cb39ed3f | 401 | |
874d3404 LP |
402 | /* We do not add any default dependencies to / and /usr, since |
403 | * they are guaranteed to stay mounted the whole time, since | |
404 | * our system is on it. Also, don't bother with anything | |
405 | * mounted below virtual file systems, it's also going to be | |
406 | * virtual, and hence not worth the effort. */ | |
407 | if (path_equal(m->where, "/") || | |
408 | path_equal(m->where, "/usr") || | |
409 | path_startswith(m->where, "/proc") || | |
410 | path_startswith(m->where, "/sys") || | |
411 | path_startswith(m->where, "/dev")) | |
6b1dc2bd | 412 | return 0; |
2edd4434 | 413 | |
874d3404 LP |
414 | p = get_mount_parameters(m); |
415 | if (!p) | |
6b1dc2bd LP |
416 | return 0; |
417 | ||
e8d2f6cd | 418 | if (mount_is_network(p)) { |
6b1dc2bd | 419 | after = SPECIAL_REMOTE_FS_PRE_TARGET; |
a63a5c46 | 420 | after2 = SPECIAL_NETWORK_TARGET; |
0c17fbce | 421 | online = SPECIAL_NETWORK_ONLINE_TARGET; |
e8d2f6cd | 422 | } else { |
6b1dc2bd | 423 | after = SPECIAL_LOCAL_FS_PRE_TARGET; |
a63a5c46 | 424 | after2 = NULL; |
0c17fbce | 425 | online = NULL; |
e8d2f6cd | 426 | } |
6b1dc2bd | 427 | |
e8d2f6cd | 428 | r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true); |
6b1dc2bd LP |
429 | if (r < 0) |
430 | return r; | |
431 | ||
a63a5c46 LP |
432 | if (after2) { |
433 | r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after2, NULL, true); | |
434 | if (r < 0) | |
435 | return r; | |
436 | } | |
437 | ||
0c17fbce LP |
438 | if (online) { |
439 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_WANTS, UNIT_AFTER, online, NULL, true); | |
e8d2f6cd LP |
440 | if (r < 0) |
441 | return r; | |
442 | } | |
443 | ||
88ac30a1 TG |
444 | if (should_umount(m)) { |
445 | r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true); | |
446 | if (r < 0) | |
447 | return r; | |
448 | } | |
2edd4434 LP |
449 | |
450 | return 0; | |
451 | } | |
452 | ||
8d567588 | 453 | static int mount_verify(Mount *m) { |
a57f7e2c | 454 | _cleanup_free_ char *e = NULL; |
7410616c | 455 | int r; |
a57f7e2c | 456 | |
8d567588 LP |
457 | assert(m); |
458 | ||
1124fe6f | 459 | if (UNIT(m)->load_state != UNIT_LOADED) |
8d567588 LP |
460 | return 0; |
461 | ||
6b1dc2bd | 462 | if (!m->from_fragment && !m->from_proc_self_mountinfo) |
8cbef760 LP |
463 | return -ENOENT; |
464 | ||
7410616c LP |
465 | r = unit_name_from_path(m->where, ".mount", &e); |
466 | if (r < 0) | |
f2341e0a | 467 | return log_unit_error_errno(UNIT(m), r, "Failed to generate unit name from mount path: %m"); |
8d567588 | 468 | |
7410616c | 469 | if (!unit_has_name(UNIT(m), e)) { |
f2341e0a | 470 | log_unit_error(UNIT(m), "Where= setting doesn't match unit name. Refusing."); |
8d567588 LP |
471 | return -EINVAL; |
472 | } | |
473 | ||
33ff02c9 | 474 | if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) { |
f2341e0a | 475 | log_unit_error(UNIT(m), "Cannot create mount unit for API file system %s. Refusing.", m->where); |
33ff02c9 LP |
476 | return -EINVAL; |
477 | } | |
478 | ||
1124fe6f | 479 | if (UNIT(m)->fragment_path && !m->parameters_fragment.what) { |
f2341e0a | 480 | log_unit_error(UNIT(m), "What= setting is missing. Refusing."); |
4e85aff4 LP |
481 | return -EBADMSG; |
482 | } | |
483 | ||
4819ff03 | 484 | if (m->exec_context.pam_name && m->kill_context.kill_mode != KILL_CONTROL_GROUP) { |
f2341e0a | 485 | log_unit_error(UNIT(m), "Unit has PAM enabled. Kill mode must be set to control-group'. Refusing."); |
4d0e5dbd LP |
486 | return -EINVAL; |
487 | } | |
488 | ||
8d567588 LP |
489 | return 0; |
490 | } | |
491 | ||
1a4ac875 MS |
492 | static int mount_add_extras(Mount *m) { |
493 | Unit *u = UNIT(m); | |
e537352b LP |
494 | int r; |
495 | ||
e821075a LP |
496 | assert(m); |
497 | ||
498 | if (u->fragment_path) | |
1a4ac875 | 499 | m->from_fragment = true; |
e537352b | 500 | |
1a4ac875 | 501 | if (!m->where) { |
7410616c LP |
502 | r = unit_name_to_path(u->id, &m->where); |
503 | if (r < 0) | |
504 | return r; | |
1a4ac875 | 505 | } |
a16e1123 | 506 | |
1a4ac875 | 507 | path_kill_slashes(m->where); |
e537352b | 508 | |
e821075a | 509 | if (!u->description) { |
1a4ac875 MS |
510 | r = unit_set_description(u, m->where); |
511 | if (r < 0) | |
173a8d04 | 512 | return r; |
1a4ac875 | 513 | } |
6e2ef85b | 514 | |
1a4ac875 MS |
515 | r = mount_add_device_links(m); |
516 | if (r < 0) | |
517 | return r; | |
6e2ef85b | 518 | |
1a4ac875 MS |
519 | r = mount_add_mount_links(m); |
520 | if (r < 0) | |
521 | return r; | |
6e2ef85b | 522 | |
1a4ac875 MS |
523 | r = mount_add_quota_links(m); |
524 | if (r < 0) | |
525 | return r; | |
e537352b | 526 | |
598459ce LP |
527 | r = unit_patch_contexts(u); |
528 | if (r < 0) | |
529 | return r; | |
4e67ddd6 | 530 | |
598459ce | 531 | r = unit_add_exec_dependencies(u, &m->exec_context); |
a016b922 LP |
532 | if (r < 0) |
533 | return r; | |
534 | ||
d79200e2 | 535 | r = unit_set_default_slice(u); |
1a4ac875 MS |
536 | if (r < 0) |
537 | return r; | |
538 | ||
4c9ea260 LP |
539 | r = mount_add_default_dependencies(m); |
540 | if (r < 0) | |
541 | return r; | |
598459ce | 542 | |
1a4ac875 MS |
543 | return 0; |
544 | } | |
545 | ||
546 | static int mount_load(Unit *u) { | |
547 | Mount *m = MOUNT(u); | |
548 | int r; | |
549 | ||
550 | assert(u); | |
551 | assert(u->load_state == UNIT_STUB); | |
552 | ||
8eba616f MS |
553 | if (m->from_proc_self_mountinfo) |
554 | r = unit_load_fragment_and_dropin_optional(u); | |
555 | else | |
556 | r = unit_load_fragment_and_dropin(u); | |
557 | ||
1a4ac875 MS |
558 | if (r < 0) |
559 | return r; | |
155da457 | 560 | |
1a4ac875 MS |
561 | /* This is a new unit? Then let's add in some extras */ |
562 | if (u->load_state == UNIT_LOADED) { | |
563 | r = mount_add_extras(m); | |
564 | if (r < 0) | |
565 | return r; | |
e537352b LP |
566 | } |
567 | ||
8d567588 | 568 | return mount_verify(m); |
e537352b LP |
569 | } |
570 | ||
deb0a77c | 571 | static int mount_notify_automount(Mount *m, MountState old_state, MountState state) { |
a16e1123 LP |
572 | Unit *p; |
573 | int r; | |
57020a3a | 574 | Iterator i; |
a16e1123 LP |
575 | |
576 | assert(m); | |
577 | ||
1124fe6f | 578 | SET_FOREACH(p, UNIT(m)->dependencies[UNIT_TRIGGERED_BY], i) |
ac155bb8 | 579 | if (p->type == UNIT_AUTOMOUNT) { |
deb0a77c | 580 | r = automount_update_mount(AUTOMOUNT(p), old_state, state); |
57020a3a LP |
581 | if (r < 0) |
582 | return r; | |
583 | } | |
a16e1123 | 584 | |
57020a3a | 585 | return 0; |
a16e1123 LP |
586 | } |
587 | ||
e537352b LP |
588 | static void mount_set_state(Mount *m, MountState state) { |
589 | MountState old_state; | |
590 | assert(m); | |
591 | ||
592 | old_state = m->state; | |
593 | m->state = state; | |
594 | ||
595 | if (state != MOUNT_MOUNTING && | |
596 | state != MOUNT_MOUNTING_DONE && | |
597 | state != MOUNT_REMOUNTING && | |
598 | state != MOUNT_UNMOUNTING && | |
599 | state != MOUNT_MOUNTING_SIGTERM && | |
600 | state != MOUNT_MOUNTING_SIGKILL && | |
601 | state != MOUNT_UNMOUNTING_SIGTERM && | |
602 | state != MOUNT_UNMOUNTING_SIGKILL && | |
603 | state != MOUNT_REMOUNTING_SIGTERM && | |
604 | state != MOUNT_REMOUNTING_SIGKILL) { | |
718db961 | 605 | m->timer_event_source = sd_event_source_unref(m->timer_event_source); |
a16e1123 | 606 | mount_unwatch_control_pid(m); |
e537352b | 607 | m->control_command = NULL; |
a16e1123 | 608 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; |
e537352b LP |
609 | } |
610 | ||
deb0a77c | 611 | mount_notify_automount(m, old_state, state); |
8d567588 | 612 | |
e537352b | 613 | if (state != old_state) |
f2341e0a | 614 | log_unit_debug(UNIT(m), "Changed %s -> %s", mount_state_to_string(old_state), 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 | ||
be847e82 | 620 | static int mount_coldplug(Unit *u) { |
e537352b | 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 | |
c386f588 LP |
636 | if (m->control_pid > 0 && |
637 | pid_is_unwaited(m->control_pid) && | |
638 | IN_SET(new_state, | |
639 | MOUNT_MOUNTING, | |
640 | MOUNT_MOUNTING_DONE, | |
641 | MOUNT_REMOUNTING, | |
642 | MOUNT_UNMOUNTING, | |
643 | MOUNT_MOUNTING_SIGTERM, | |
644 | MOUNT_MOUNTING_SIGKILL, | |
645 | MOUNT_UNMOUNTING_SIGTERM, | |
646 | MOUNT_UNMOUNTING_SIGKILL, | |
647 | MOUNT_REMOUNTING_SIGTERM, | |
648 | MOUNT_REMOUNTING_SIGKILL)) { | |
5bcb0f2b LP |
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" | |
46a01aba | 681 | "%sDirectoryMode: %04o\n" |
7cb48925 | 682 | "%sSmackFileSystemRootLabel: %s\n", |
a16e1123 | 683 | prefix, mount_state_to_string(m->state), |
81a5c6d0 | 684 | prefix, mount_result_to_string(m->result), |
e537352b | 685 | prefix, m->where, |
1e4fc9b1 HH |
686 | prefix, p ? strna(p->what) : "n/a", |
687 | prefix, p ? strna(p->fstype) : "n/a", | |
688 | prefix, p ? strna(p->options) : "n/a", | |
e537352b LP |
689 | prefix, yes_no(m->from_proc_self_mountinfo), |
690 | prefix, yes_no(m->from_fragment), | |
46a01aba | 691 | prefix, m->directory_mode, |
7cb48925 | 692 | prefix, strna(m->smack_fs_root_label)); |
e537352b LP |
693 | |
694 | if (m->control_pid > 0) | |
695 | fprintf(f, | |
ccd06097 ZJS |
696 | "%sControl PID: "PID_FMT"\n", |
697 | prefix, m->control_pid); | |
e537352b LP |
698 | |
699 | exec_context_dump(&m->exec_context, f, prefix); | |
4819ff03 | 700 | kill_context_dump(&m->kill_context, f, prefix); |
e537352b LP |
701 | } |
702 | ||
a16e1123 LP |
703 | static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) { |
704 | pid_t pid; | |
705 | int r; | |
9fa95f85 DM |
706 | ExecParameters exec_params = { |
707 | .apply_permissions = true, | |
708 | .apply_chroot = true, | |
709 | .apply_tty_stdin = true, | |
6f856a09 | 710 | .bus_endpoint_fd = -1, |
a34ceba6 LP |
711 | .stdin_fd = -1, |
712 | .stdout_fd = -1, | |
713 | .stderr_fd = -1, | |
9fa95f85 | 714 | }; |
a16e1123 LP |
715 | |
716 | assert(m); | |
717 | assert(c); | |
718 | assert(_pid); | |
719 | ||
5ad096b3 LP |
720 | (void) unit_realize_cgroup(UNIT(m)); |
721 | if (m->reset_cpu_usage) { | |
722 | (void) unit_reset_cpu_usage(UNIT(m)); | |
723 | m->reset_cpu_usage = false; | |
724 | } | |
4ad49000 | 725 | |
613b411c LP |
726 | r = unit_setup_exec_runtime(UNIT(m)); |
727 | if (r < 0) | |
728 | goto fail; | |
729 | ||
718db961 | 730 | r = mount_arm_timer(m); |
36697dc0 | 731 | if (r < 0) |
a16e1123 LP |
732 | goto fail; |
733 | ||
9fa95f85 DM |
734 | exec_params.environment = UNIT(m)->manager->environment; |
735 | exec_params.confirm_spawn = UNIT(m)->manager->confirm_spawn; | |
736 | exec_params.cgroup_supported = UNIT(m)->manager->cgroup_supported; | |
737 | exec_params.cgroup_path = UNIT(m)->cgroup_path; | |
a931ad47 | 738 | exec_params.cgroup_delegate = m->cgroup_context.delegate; |
9fa95f85 | 739 | exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(m)->manager); |
9fa95f85 | 740 | |
f2341e0a LP |
741 | r = exec_spawn(UNIT(m), |
742 | c, | |
4ad49000 | 743 | &m->exec_context, |
9fa95f85 | 744 | &exec_params, |
613b411c | 745 | m->exec_runtime, |
4ad49000 LP |
746 | &pid); |
747 | if (r < 0) | |
a16e1123 LP |
748 | goto fail; |
749 | ||
4ad49000 LP |
750 | r = unit_watch_pid(UNIT(m), pid); |
751 | if (r < 0) | |
a16e1123 LP |
752 | /* FIXME: we need to do something here */ |
753 | goto fail; | |
754 | ||
755 | *_pid = pid; | |
756 | ||
757 | return 0; | |
758 | ||
759 | fail: | |
718db961 | 760 | m->timer_event_source = sd_event_source_unref(m->timer_event_source); |
a16e1123 LP |
761 | |
762 | return r; | |
763 | } | |
764 | ||
9d2f5178 | 765 | static void mount_enter_dead(Mount *m, MountResult f) { |
e537352b LP |
766 | assert(m); |
767 | ||
9d2f5178 LP |
768 | if (f != MOUNT_SUCCESS) |
769 | m->result = f; | |
e537352b | 770 | |
613b411c LP |
771 | exec_runtime_destroy(m->exec_runtime); |
772 | m->exec_runtime = exec_runtime_unref(m->exec_runtime); | |
773 | ||
e66cf1a3 LP |
774 | exec_context_destroy_runtime_directory(&m->exec_context, manager_get_runtime_prefix(UNIT(m)->manager)); |
775 | ||
9d2f5178 | 776 | mount_set_state(m, m->result != MOUNT_SUCCESS ? MOUNT_FAILED : MOUNT_DEAD); |
e537352b LP |
777 | } |
778 | ||
9d2f5178 | 779 | static void mount_enter_mounted(Mount *m, MountResult f) { |
80876c20 LP |
780 | assert(m); |
781 | ||
9d2f5178 LP |
782 | if (f != MOUNT_SUCCESS) |
783 | m->result = f; | |
80876c20 LP |
784 | |
785 | mount_set_state(m, MOUNT_MOUNTED); | |
786 | } | |
787 | ||
9d2f5178 | 788 | static void mount_enter_signal(Mount *m, MountState state, MountResult f) { |
e537352b LP |
789 | int r; |
790 | ||
791 | assert(m); | |
792 | ||
9d2f5178 LP |
793 | if (f != MOUNT_SUCCESS) |
794 | m->result = f; | |
e537352b | 795 | |
cd2086fe LP |
796 | r = unit_kill_context( |
797 | UNIT(m), | |
798 | &m->kill_context, | |
db2cb23b UTL |
799 | (state != MOUNT_MOUNTING_SIGTERM && state != MOUNT_UNMOUNTING_SIGTERM && state != MOUNT_REMOUNTING_SIGTERM) ? |
800 | KILL_KILL : KILL_TERMINATE, | |
cd2086fe LP |
801 | -1, |
802 | m->control_pid, | |
803 | false); | |
804 | if (r < 0) | |
805 | goto fail; | |
e537352b | 806 | |
cd2086fe | 807 | if (r > 0) { |
718db961 | 808 | r = mount_arm_timer(m); |
36697dc0 | 809 | if (r < 0) |
80876c20 | 810 | goto fail; |
e537352b | 811 | |
80876c20 | 812 | mount_set_state(m, state); |
ac84d1fb LP |
813 | } else if (state == MOUNT_REMOUNTING_SIGTERM) |
814 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_SUCCESS); | |
815 | else if (state == MOUNT_REMOUNTING_SIGKILL) | |
9d2f5178 | 816 | mount_enter_mounted(m, MOUNT_SUCCESS); |
ac84d1fb LP |
817 | else if (state == MOUNT_MOUNTING_SIGTERM) |
818 | mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_SUCCESS); | |
819 | else if (state == MOUNT_UNMOUNTING_SIGTERM) | |
820 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_SUCCESS); | |
80876c20 | 821 | else |
9d2f5178 | 822 | mount_enter_dead(m, MOUNT_SUCCESS); |
e537352b LP |
823 | |
824 | return; | |
825 | ||
826 | fail: | |
f2341e0a | 827 | log_unit_warning_errno(UNIT(m), r, "Failed to kill processes: %m"); |
e537352b | 828 | |
80876c20 | 829 | if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL) |
9d2f5178 | 830 | mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES); |
80876c20 | 831 | else |
9d2f5178 | 832 | mount_enter_dead(m, MOUNT_FAILURE_RESOURCES); |
5261ba90 TT |
833 | } |
834 | ||
9d2f5178 | 835 | static void mount_enter_unmounting(Mount *m) { |
e537352b LP |
836 | int r; |
837 | ||
838 | assert(m); | |
839 | ||
7d54a03a LP |
840 | /* Start counting our attempts */ |
841 | if (!IN_SET(m->state, | |
842 | MOUNT_UNMOUNTING, | |
843 | MOUNT_UNMOUNTING_SIGTERM, | |
844 | MOUNT_UNMOUNTING_SIGKILL)) | |
845 | m->n_retry_umount = 0; | |
846 | ||
a16e1123 LP |
847 | m->control_command_id = MOUNT_EXEC_UNMOUNT; |
848 | m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT; | |
e537352b | 849 | |
f00929ad | 850 | r = exec_command_set(m->control_command, UMOUNT_PATH, m->where, NULL); |
7d54a03a | 851 | if (r < 0) |
e537352b LP |
852 | goto fail; |
853 | ||
a16e1123 | 854 | mount_unwatch_control_pid(m); |
5e94833f | 855 | |
7d54a03a LP |
856 | r = mount_spawn(m, m->control_command, &m->control_pid); |
857 | if (r < 0) | |
e537352b LP |
858 | goto fail; |
859 | ||
860 | mount_set_state(m, MOUNT_UNMOUNTING); | |
861 | ||
862 | return; | |
863 | ||
864 | fail: | |
f2341e0a | 865 | log_unit_warning_errno(UNIT(m), r, "Failed to run 'umount' task: %m"); |
9d2f5178 | 866 | mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES); |
e537352b LP |
867 | } |
868 | ||
46a01aba SW |
869 | static int mount_get_opts(Mount *m, char **_opts) { |
870 | int r; | |
871 | char *o = NULL, *opts = NULL; | |
872 | ||
873 | r = fstab_filter_options(m->parameters_fragment.options, | |
874 | "nofail\0" "noauto\0" "auto\0", NULL, NULL, &o); | |
875 | if (r < 0) | |
876 | return r; | |
877 | ||
7cb48925 | 878 | if (mac_smack_use() && m->smack_fs_root_label) { |
46a01aba | 879 | if (!isempty(o)) { |
7cb48925 | 880 | opts = strjoin(o, ",", "smackfsroot=", m->smack_fs_root_label, NULL); |
46a01aba SW |
881 | free(o); |
882 | } else | |
7cb48925 | 883 | opts = strjoin("smackfsroot=", m->smack_fs_root_label, NULL); |
46a01aba SW |
884 | |
885 | if (!opts) | |
886 | return -ENOMEM; | |
887 | } else | |
888 | opts = o; | |
889 | ||
890 | *_opts = opts; | |
891 | return 0; | |
892 | } | |
893 | ||
8d567588 | 894 | static void mount_enter_mounting(Mount *m) { |
e537352b | 895 | int r; |
cb39ed3f | 896 | MountParameters *p; |
e537352b LP |
897 | |
898 | assert(m); | |
899 | ||
a16e1123 LP |
900 | m->control_command_id = MOUNT_EXEC_MOUNT; |
901 | m->control_command = m->exec_command + MOUNT_EXEC_MOUNT; | |
e537352b | 902 | |
f2341e0a LP |
903 | r = unit_fail_if_symlink(UNIT(m), m->where); |
904 | if (r < 0) | |
905 | goto fail; | |
906 | ||
907 | (void) mkdir_p_label(m->where, m->directory_mode); | |
3e5235b0 | 908 | |
f2341e0a | 909 | unit_warn_if_dir_nonempty(UNIT(m), m->where); |
257f1d8e | 910 | |
cb39ed3f | 911 | /* Create the source directory for bind-mounts if needed */ |
6b1dc2bd | 912 | p = get_mount_parameters_fragment(m); |
cb39ed3f | 913 | if (p && mount_is_bind(p)) |
f2341e0a | 914 | (void) mkdir_p_label(p->what, m->directory_mode); |
5261ba90 | 915 | |
e86b3761 | 916 | if (m->from_fragment) { |
17a1c597 ZJS |
917 | _cleanup_free_ char *opts = NULL; |
918 | ||
46a01aba | 919 | r = mount_get_opts(m, &opts); |
17a1c597 ZJS |
920 | if (r < 0) |
921 | goto fail; | |
922 | ||
f00929ad | 923 | r = exec_command_set(m->control_command, MOUNT_PATH, |
e86b3761 | 924 | m->parameters_fragment.what, m->where, NULL); |
e86b3761 ZJS |
925 | if (r >= 0 && m->sloppy_options) |
926 | r = exec_command_append(m->control_command, "-s", NULL); | |
927 | if (r >= 0 && m->parameters_fragment.fstype) | |
928 | r = exec_command_append(m->control_command, "-t", m->parameters_fragment.fstype, NULL); | |
0c47569a | 929 | if (r >= 0 && !isempty(opts)) |
17a1c597 | 930 | r = exec_command_append(m->control_command, "-o", opts, NULL); |
e86b3761 | 931 | } else |
e537352b LP |
932 | r = -ENOENT; |
933 | ||
934 | if (r < 0) | |
935 | goto fail; | |
936 | ||
a16e1123 | 937 | mount_unwatch_control_pid(m); |
5e94833f | 938 | |
257f1d8e LP |
939 | r = mount_spawn(m, m->control_command, &m->control_pid); |
940 | if (r < 0) | |
e537352b LP |
941 | goto fail; |
942 | ||
943 | mount_set_state(m, MOUNT_MOUNTING); | |
944 | ||
945 | return; | |
946 | ||
947 | fail: | |
f2341e0a | 948 | log_unit_warning_errno(UNIT(m), r, "Failed to run 'mount' task: %m"); |
9d2f5178 | 949 | mount_enter_dead(m, MOUNT_FAILURE_RESOURCES); |
e537352b LP |
950 | } |
951 | ||
9d2f5178 | 952 | static void mount_enter_remounting(Mount *m) { |
e537352b LP |
953 | int r; |
954 | ||
955 | assert(m); | |
956 | ||
a16e1123 LP |
957 | m->control_command_id = MOUNT_EXEC_REMOUNT; |
958 | m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT; | |
e537352b LP |
959 | |
960 | if (m->from_fragment) { | |
e537352b LP |
961 | const char *o; |
962 | ||
718db961 | 963 | if (m->parameters_fragment.options) |
63c372cb | 964 | o = strjoina("remount,", m->parameters_fragment.options); |
718db961 | 965 | else |
e537352b LP |
966 | o = "remount"; |
967 | ||
f00929ad | 968 | r = exec_command_set(m->control_command, MOUNT_PATH, |
e86b3761 ZJS |
969 | m->parameters_fragment.what, m->where, |
970 | "-o", o, NULL); | |
e86b3761 ZJS |
971 | if (r >= 0 && m->sloppy_options) |
972 | r = exec_command_append(m->control_command, "-s", NULL); | |
973 | if (r >= 0 && m->parameters_fragment.fstype) | |
974 | r = exec_command_append(m->control_command, "-t", m->parameters_fragment.fstype, NULL); | |
6b1dc2bd | 975 | } else |
e537352b LP |
976 | r = -ENOENT; |
977 | ||
60b912f6 | 978 | if (r < 0) |
e537352b | 979 | goto fail; |
e537352b | 980 | |
a16e1123 | 981 | mount_unwatch_control_pid(m); |
5e94833f | 982 | |
718db961 LP |
983 | r = mount_spawn(m, m->control_command, &m->control_pid); |
984 | if (r < 0) | |
e537352b LP |
985 | goto fail; |
986 | ||
987 | mount_set_state(m, MOUNT_REMOUNTING); | |
988 | ||
989 | return; | |
990 | ||
991 | fail: | |
f2341e0a | 992 | log_unit_warning_errno(UNIT(m), r, "Failed to run 'remount' task: %m"); |
9d2f5178 LP |
993 | m->reload_result = MOUNT_FAILURE_RESOURCES; |
994 | mount_enter_mounted(m, MOUNT_SUCCESS); | |
e537352b LP |
995 | } |
996 | ||
997 | static int mount_start(Unit *u) { | |
998 | Mount *m = MOUNT(u); | |
999 | ||
1000 | assert(m); | |
1001 | ||
1002 | /* We cannot fulfill this request right now, try again later | |
1003 | * please! */ | |
1004 | if (m->state == MOUNT_UNMOUNTING || | |
1005 | m->state == MOUNT_UNMOUNTING_SIGTERM || | |
60b912f6 LP |
1006 | m->state == MOUNT_UNMOUNTING_SIGKILL || |
1007 | m->state == MOUNT_MOUNTING_SIGTERM || | |
1008 | m->state == MOUNT_MOUNTING_SIGKILL) | |
e537352b LP |
1009 | return -EAGAIN; |
1010 | ||
1011 | /* Already on it! */ | |
60b912f6 | 1012 | if (m->state == MOUNT_MOUNTING) |
e537352b LP |
1013 | return 0; |
1014 | ||
fdf20a31 | 1015 | assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED); |
e537352b | 1016 | |
9d2f5178 LP |
1017 | m->result = MOUNT_SUCCESS; |
1018 | m->reload_result = MOUNT_SUCCESS; | |
5ad096b3 | 1019 | m->reset_cpu_usage = true; |
9d2f5178 | 1020 | |
8d567588 | 1021 | mount_enter_mounting(m); |
82a2b6bb | 1022 | return 1; |
e537352b LP |
1023 | } |
1024 | ||
1025 | static int mount_stop(Unit *u) { | |
1026 | Mount *m = MOUNT(u); | |
1027 | ||
1028 | assert(m); | |
1029 | ||
e537352b LP |
1030 | /* Already on it */ |
1031 | if (m->state == MOUNT_UNMOUNTING || | |
1032 | m->state == MOUNT_UNMOUNTING_SIGKILL || | |
60b912f6 LP |
1033 | m->state == MOUNT_UNMOUNTING_SIGTERM || |
1034 | m->state == MOUNT_MOUNTING_SIGTERM || | |
1035 | m->state == MOUNT_MOUNTING_SIGKILL) | |
e537352b LP |
1036 | return 0; |
1037 | ||
3f6c78dc LP |
1038 | assert(m->state == MOUNT_MOUNTING || |
1039 | m->state == MOUNT_MOUNTING_DONE || | |
1040 | m->state == MOUNT_MOUNTED || | |
3f6c78dc LP |
1041 | m->state == MOUNT_REMOUNTING || |
1042 | m->state == MOUNT_REMOUNTING_SIGTERM || | |
1043 | m->state == MOUNT_REMOUNTING_SIGKILL); | |
e537352b | 1044 | |
9d2f5178 | 1045 | mount_enter_unmounting(m); |
82a2b6bb | 1046 | return 1; |
e537352b LP |
1047 | } |
1048 | ||
1049 | static int mount_reload(Unit *u) { | |
1050 | Mount *m = MOUNT(u); | |
1051 | ||
1052 | assert(m); | |
1053 | ||
1054 | if (m->state == MOUNT_MOUNTING_DONE) | |
1055 | return -EAGAIN; | |
1056 | ||
1057 | assert(m->state == MOUNT_MOUNTED); | |
1058 | ||
9d2f5178 | 1059 | mount_enter_remounting(m); |
2d018ae2 | 1060 | return 1; |
e537352b LP |
1061 | } |
1062 | ||
a16e1123 LP |
1063 | static int mount_serialize(Unit *u, FILE *f, FDSet *fds) { |
1064 | Mount *m = MOUNT(u); | |
1065 | ||
1066 | assert(m); | |
1067 | assert(f); | |
1068 | assert(fds); | |
1069 | ||
1070 | unit_serialize_item(u, f, "state", mount_state_to_string(m->state)); | |
9d2f5178 LP |
1071 | unit_serialize_item(u, f, "result", mount_result_to_string(m->result)); |
1072 | unit_serialize_item(u, f, "reload-result", mount_result_to_string(m->reload_result)); | |
a16e1123 LP |
1073 | |
1074 | if (m->control_pid > 0) | |
ccd06097 | 1075 | unit_serialize_item_format(u, f, "control-pid", PID_FMT, m->control_pid); |
a16e1123 LP |
1076 | |
1077 | if (m->control_command_id >= 0) | |
1078 | unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id)); | |
1079 | ||
1080 | return 0; | |
1081 | } | |
1082 | ||
1083 | static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
1084 | Mount *m = MOUNT(u); | |
a16e1123 LP |
1085 | |
1086 | assert(u); | |
1087 | assert(key); | |
1088 | assert(value); | |
1089 | assert(fds); | |
1090 | ||
1091 | if (streq(key, "state")) { | |
1092 | MountState state; | |
1093 | ||
1094 | if ((state = mount_state_from_string(value)) < 0) | |
f2341e0a | 1095 | log_unit_debug(u, "Failed to parse state value: %s", value); |
a16e1123 LP |
1096 | else |
1097 | m->deserialized_state = state; | |
9d2f5178 LP |
1098 | } else if (streq(key, "result")) { |
1099 | MountResult f; | |
a16e1123 | 1100 | |
9d2f5178 LP |
1101 | f = mount_result_from_string(value); |
1102 | if (f < 0) | |
f2341e0a | 1103 | log_unit_debug(u, "Failed to parse result value: %s", value); |
9d2f5178 LP |
1104 | else if (f != MOUNT_SUCCESS) |
1105 | m->result = f; | |
1106 | ||
1107 | } else if (streq(key, "reload-result")) { | |
1108 | MountResult f; | |
1109 | ||
1110 | f = mount_result_from_string(value); | |
1111 | if (f < 0) | |
f2341e0a | 1112 | log_unit_debug(u, "Failed to parse reload result value: %s", value); |
9d2f5178 LP |
1113 | else if (f != MOUNT_SUCCESS) |
1114 | m->reload_result = f; | |
a16e1123 LP |
1115 | |
1116 | } else if (streq(key, "control-pid")) { | |
5925dd3c | 1117 | pid_t pid; |
a16e1123 | 1118 | |
e364ad06 | 1119 | if (parse_pid(value, &pid) < 0) |
f2341e0a | 1120 | log_unit_debug(u, "Failed to parse control-pid value: %s", value); |
a16e1123 | 1121 | else |
5925dd3c | 1122 | m->control_pid = pid; |
a16e1123 LP |
1123 | } else if (streq(key, "control-command")) { |
1124 | MountExecCommand id; | |
1125 | ||
f2341e0a LP |
1126 | id = mount_exec_command_from_string(value); |
1127 | if (id < 0) | |
1128 | log_unit_debug(u, "Failed to parse exec-command value: %s", value); | |
a16e1123 LP |
1129 | else { |
1130 | m->control_command_id = id; | |
1131 | m->control_command = m->exec_command + id; | |
1132 | } | |
a16e1123 | 1133 | } else |
f2341e0a | 1134 | log_unit_debug(u, "Unknown serialization key: %s", key); |
a16e1123 LP |
1135 | |
1136 | return 0; | |
1137 | } | |
1138 | ||
44a6b1b6 | 1139 | _pure_ static UnitActiveState mount_active_state(Unit *u) { |
e537352b LP |
1140 | assert(u); |
1141 | ||
1142 | return state_translation_table[MOUNT(u)->state]; | |
1143 | } | |
1144 | ||
44a6b1b6 | 1145 | _pure_ static const char *mount_sub_state_to_string(Unit *u) { |
10a94420 LP |
1146 | assert(u); |
1147 | ||
a16e1123 | 1148 | return mount_state_to_string(MOUNT(u)->state); |
10a94420 LP |
1149 | } |
1150 | ||
44a6b1b6 | 1151 | _pure_ static bool mount_check_gc(Unit *u) { |
701cc384 LP |
1152 | Mount *m = MOUNT(u); |
1153 | ||
1154 | assert(m); | |
1155 | ||
6b1dc2bd | 1156 | return m->from_proc_self_mountinfo; |
701cc384 LP |
1157 | } |
1158 | ||
e537352b LP |
1159 | static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
1160 | Mount *m = MOUNT(u); | |
9d2f5178 | 1161 | MountResult f; |
e537352b LP |
1162 | |
1163 | assert(m); | |
1164 | assert(pid >= 0); | |
1165 | ||
8c47c732 LP |
1166 | if (pid != m->control_pid) |
1167 | return; | |
e537352b | 1168 | |
e537352b LP |
1169 | m->control_pid = 0; |
1170 | ||
96342de6 | 1171 | if (is_clean_exit(code, status, NULL)) |
9d2f5178 LP |
1172 | f = MOUNT_SUCCESS; |
1173 | else if (code == CLD_EXITED) | |
1174 | f = MOUNT_FAILURE_EXIT_CODE; | |
1175 | else if (code == CLD_KILLED) | |
1176 | f = MOUNT_FAILURE_SIGNAL; | |
1177 | else if (code == CLD_DUMPED) | |
1178 | f = MOUNT_FAILURE_CORE_DUMP; | |
1179 | else | |
1180 | assert_not_reached("Unknown code"); | |
1181 | ||
1182 | if (f != MOUNT_SUCCESS) | |
1183 | m->result = f; | |
8c47c732 | 1184 | |
a16e1123 | 1185 | if (m->control_command) { |
6ea832a2 | 1186 | exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status); |
9d2f5178 | 1187 | |
a16e1123 LP |
1188 | m->control_command = NULL; |
1189 | m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; | |
1190 | } | |
1191 | ||
f2341e0a LP |
1192 | log_unit_full(u, f == MOUNT_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0, |
1193 | "Mount process exited, code=%s status=%i", sigchld_code_to_string(code), status); | |
e537352b LP |
1194 | |
1195 | /* Note that mount(8) returning and the kernel sending us a | |
1196 | * mount table change event might happen out-of-order. If an | |
1197 | * operation succeed we assume the kernel will follow soon too | |
1198 | * and already change into the resulting state. If it fails | |
1199 | * we check if the kernel still knows about the mount. and | |
1200 | * change state accordingly. */ | |
1201 | ||
1202 | switch (m->state) { | |
1203 | ||
1204 | case MOUNT_MOUNTING: | |
1205 | case MOUNT_MOUNTING_DONE: | |
1206 | case MOUNT_MOUNTING_SIGKILL: | |
1207 | case MOUNT_MOUNTING_SIGTERM: | |
e537352b | 1208 | |
9d2f5178 LP |
1209 | if (f == MOUNT_SUCCESS) |
1210 | mount_enter_mounted(m, f); | |
e537352b | 1211 | else if (m->from_proc_self_mountinfo) |
9d2f5178 | 1212 | mount_enter_mounted(m, f); |
e537352b | 1213 | else |
9d2f5178 | 1214 | mount_enter_dead(m, f); |
e537352b LP |
1215 | break; |
1216 | ||
e2f3b44c LP |
1217 | case MOUNT_REMOUNTING: |
1218 | case MOUNT_REMOUNTING_SIGKILL: | |
1219 | case MOUNT_REMOUNTING_SIGTERM: | |
1220 | ||
9d2f5178 | 1221 | m->reload_result = f; |
e2f3b44c | 1222 | if (m->from_proc_self_mountinfo) |
9d2f5178 | 1223 | mount_enter_mounted(m, MOUNT_SUCCESS); |
e2f3b44c | 1224 | else |
9d2f5178 | 1225 | mount_enter_dead(m, MOUNT_SUCCESS); |
e2f3b44c LP |
1226 | |
1227 | break; | |
1228 | ||
e537352b LP |
1229 | case MOUNT_UNMOUNTING: |
1230 | case MOUNT_UNMOUNTING_SIGKILL: | |
1231 | case MOUNT_UNMOUNTING_SIGTERM: | |
1232 | ||
7d54a03a LP |
1233 | if (f == MOUNT_SUCCESS) { |
1234 | ||
1235 | if (m->from_proc_self_mountinfo) { | |
1236 | ||
1237 | /* Still a mount point? If so, let's | |
1238 | * try again. Most likely there were | |
1239 | * multiple mount points stacked on | |
1240 | * top of each other. Note that due to | |
1241 | * the io event priority logic we can | |
1242 | * be sure the new mountinfo is loaded | |
1243 | * before we process the SIGCHLD for | |
1244 | * the mount command. */ | |
1245 | ||
1246 | if (m->n_retry_umount < RETRY_UMOUNT_MAX) { | |
f2341e0a | 1247 | log_unit_debug(u, "Mount still present, trying again."); |
7d54a03a LP |
1248 | m->n_retry_umount++; |
1249 | mount_enter_unmounting(m); | |
1250 | } else { | |
f2341e0a | 1251 | log_unit_debug(u, "Mount still present after %u attempts to unmount, giving up.", m->n_retry_umount); |
7d54a03a LP |
1252 | mount_enter_mounted(m, f); |
1253 | } | |
1254 | } else | |
1255 | mount_enter_dead(m, f); | |
1256 | ||
1257 | } else if (m->from_proc_self_mountinfo) | |
9d2f5178 | 1258 | mount_enter_mounted(m, f); |
e537352b | 1259 | else |
9d2f5178 | 1260 | mount_enter_dead(m, f); |
e537352b LP |
1261 | break; |
1262 | ||
1263 | default: | |
1264 | assert_not_reached("Uh, control process died at wrong time."); | |
1265 | } | |
c4e2ceae LP |
1266 | |
1267 | /* Notify clients about changed exit status */ | |
1268 | unit_add_to_dbus_queue(u); | |
e537352b LP |
1269 | } |
1270 | ||
718db961 LP |
1271 | static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
1272 | Mount *m = MOUNT(userdata); | |
e537352b LP |
1273 | |
1274 | assert(m); | |
718db961 | 1275 | assert(m->timer_event_source == source); |
e537352b LP |
1276 | |
1277 | switch (m->state) { | |
1278 | ||
1279 | case MOUNT_MOUNTING: | |
1280 | case MOUNT_MOUNTING_DONE: | |
f2341e0a | 1281 | log_unit_warning(UNIT(m), "Mounting timed out. Stopping."); |
9d2f5178 | 1282 | mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT); |
e537352b LP |
1283 | break; |
1284 | ||
1285 | case MOUNT_REMOUNTING: | |
f2341e0a | 1286 | log_unit_warning(UNIT(m), "Remounting timed out. Stopping."); |
9d2f5178 LP |
1287 | m->reload_result = MOUNT_FAILURE_TIMEOUT; |
1288 | mount_enter_mounted(m, MOUNT_SUCCESS); | |
e537352b LP |
1289 | break; |
1290 | ||
1291 | case MOUNT_UNMOUNTING: | |
f2341e0a | 1292 | log_unit_warning(UNIT(m), "Unmounting timed out. Stopping."); |
9d2f5178 | 1293 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT); |
e537352b LP |
1294 | break; |
1295 | ||
1296 | case MOUNT_MOUNTING_SIGTERM: | |
4819ff03 | 1297 | if (m->kill_context.send_sigkill) { |
f2341e0a | 1298 | log_unit_warning(UNIT(m), "Mounting timed out. Killing."); |
9d2f5178 | 1299 | mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1300 | } else { |
f2341e0a | 1301 | log_unit_warning(UNIT(m), "Mounting timed out. Skipping SIGKILL. Ignoring."); |
ba035df2 LP |
1302 | |
1303 | if (m->from_proc_self_mountinfo) | |
9d2f5178 | 1304 | mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1305 | else |
9d2f5178 | 1306 | mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1307 | } |
e537352b LP |
1308 | break; |
1309 | ||
1310 | case MOUNT_REMOUNTING_SIGTERM: | |
4819ff03 | 1311 | if (m->kill_context.send_sigkill) { |
f2341e0a | 1312 | log_unit_warning(UNIT(m), "Remounting timed out. Killing."); |
9d2f5178 | 1313 | mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1314 | } else { |
f2341e0a | 1315 | log_unit_warning(UNIT(m), "Remounting timed out. Skipping SIGKILL. Ignoring."); |
ba035df2 LP |
1316 | |
1317 | if (m->from_proc_self_mountinfo) | |
9d2f5178 | 1318 | mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1319 | else |
9d2f5178 | 1320 | mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1321 | } |
e537352b LP |
1322 | break; |
1323 | ||
1324 | case MOUNT_UNMOUNTING_SIGTERM: | |
4819ff03 | 1325 | if (m->kill_context.send_sigkill) { |
f2341e0a | 1326 | log_unit_warning(UNIT(m), "Unmounting timed out. Killing."); |
9d2f5178 | 1327 | mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1328 | } else { |
f2341e0a | 1329 | log_unit_warning(UNIT(m), "Unmounting timed out. Skipping SIGKILL. Ignoring."); |
ba035df2 LP |
1330 | |
1331 | if (m->from_proc_self_mountinfo) | |
9d2f5178 | 1332 | mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1333 | else |
9d2f5178 | 1334 | mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT); |
ba035df2 | 1335 | } |
e537352b LP |
1336 | break; |
1337 | ||
1338 | case MOUNT_MOUNTING_SIGKILL: | |
1339 | case MOUNT_REMOUNTING_SIGKILL: | |
1340 | case MOUNT_UNMOUNTING_SIGKILL: | |
f2341e0a | 1341 | log_unit_warning(UNIT(m),"Mount process still around after SIGKILL. Ignoring."); |
e537352b LP |
1342 | |
1343 | if (m->from_proc_self_mountinfo) | |
9d2f5178 | 1344 | mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT); |
e537352b | 1345 | else |
9d2f5178 | 1346 | mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT); |
e537352b LP |
1347 | break; |
1348 | ||
1349 | default: | |
1350 | assert_not_reached("Timeout at wrong time."); | |
1351 | } | |
718db961 LP |
1352 | |
1353 | return 0; | |
e537352b LP |
1354 | } |
1355 | ||
628c89cc | 1356 | static int mount_setup_unit( |
e537352b LP |
1357 | Manager *m, |
1358 | const char *what, | |
1359 | const char *where, | |
1360 | const char *options, | |
1361 | const char *fstype, | |
e537352b | 1362 | bool set_flags) { |
057d9ab8 LP |
1363 | |
1364 | _cleanup_free_ char *e = NULL, *w = NULL, *o = NULL, *f = NULL; | |
b87705cd | 1365 | bool load_extras = false; |
057d9ab8 | 1366 | MountParameters *p; |
ff5f34d0 | 1367 | bool delete, changed = false; |
057d9ab8 LP |
1368 | Unit *u; |
1369 | int r; | |
b08d03ff | 1370 | |
f50e0a01 | 1371 | assert(m); |
b08d03ff LP |
1372 | assert(what); |
1373 | assert(where); | |
e537352b LP |
1374 | assert(options); |
1375 | assert(fstype); | |
1376 | ||
e537352b LP |
1377 | /* Ignore API mount points. They should never be referenced in |
1378 | * dependencies ever. */ | |
33ff02c9 | 1379 | if (mount_point_is_api(where) || mount_point_ignore(where)) |
57f2a956 | 1380 | return 0; |
b08d03ff | 1381 | |
8d567588 LP |
1382 | if (streq(fstype, "autofs")) |
1383 | return 0; | |
1384 | ||
4e85aff4 LP |
1385 | /* probably some kind of swap, ignore */ |
1386 | if (!is_path(where)) | |
b08d03ff LP |
1387 | return 0; |
1388 | ||
7410616c LP |
1389 | r = unit_name_from_path(where, ".mount", &e); |
1390 | if (r < 0) | |
1391 | return r; | |
b08d03ff | 1392 | |
7d17cfbc MS |
1393 | u = manager_get_unit(m, e); |
1394 | if (!u) { | |
b08d03ff LP |
1395 | delete = true; |
1396 | ||
7d17cfbc | 1397 | u = unit_new(m, sizeof(Mount)); |
057d9ab8 | 1398 | if (!u) |
628c89cc | 1399 | return log_oom(); |
b08d03ff LP |
1400 | |
1401 | r = unit_add_name(u, e); | |
b08d03ff LP |
1402 | if (r < 0) |
1403 | goto fail; | |
1404 | ||
7d17cfbc MS |
1405 | MOUNT(u)->where = strdup(where); |
1406 | if (!MOUNT(u)->where) { | |
07b0b134 ML |
1407 | r = -ENOMEM; |
1408 | goto fail; | |
1409 | } | |
f50e0a01 | 1410 | |
47a81ba2 UTL |
1411 | u->source_path = strdup("/proc/self/mountinfo"); |
1412 | if (!u->source_path) { | |
1413 | r = -ENOMEM; | |
1414 | goto fail; | |
1415 | } | |
1416 | ||
b2c23da8 | 1417 | if (m->running_as == MANAGER_SYSTEM) { |
057d9ab8 LP |
1418 | const char* target; |
1419 | ||
affc3d83 | 1420 | target = mount_needs_network(options, fstype) ? SPECIAL_REMOTE_FS_TARGET : SPECIAL_LOCAL_FS_TARGET; |
057d9ab8 | 1421 | r = unit_add_dependency_by_name(u, UNIT_BEFORE, target, NULL, true); |
602c0e74 LP |
1422 | if (r < 0) |
1423 | goto fail; | |
057d9ab8 LP |
1424 | |
1425 | if (should_umount(MOUNT(u))) { | |
1426 | r = unit_add_dependency_by_name(u, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true); | |
1427 | if (r < 0) | |
1428 | goto fail; | |
1429 | } | |
602c0e74 | 1430 | } |
89b1d5e0 | 1431 | |
f94ea366 | 1432 | unit_add_to_load_queue(u); |
ff5f34d0 | 1433 | changed = true; |
b08d03ff LP |
1434 | } else { |
1435 | delete = false; | |
8eba616f | 1436 | |
bcbd5405 WW |
1437 | if (!MOUNT(u)->where) { |
1438 | MOUNT(u)->where = strdup(where); | |
1439 | if (!MOUNT(u)->where) { | |
1440 | r = -ENOMEM; | |
1441 | goto fail; | |
1442 | } | |
1443 | } | |
1444 | ||
b2c23da8 | 1445 | if (m->running_as == MANAGER_SYSTEM && |
9d05dd2e | 1446 | mount_needs_network(options, fstype)) { |
a6d305f9 CL |
1447 | /* _netdev option may have shown up late, or on a |
1448 | * remount. Add remote-fs dependencies, even though | |
9d05dd2e ZJS |
1449 | * local-fs ones may already be there. */ |
1450 | unit_add_dependency_by_name(u, UNIT_BEFORE, SPECIAL_REMOTE_FS_TARGET, NULL, true); | |
1451 | load_extras = true; | |
a6d305f9 CL |
1452 | } |
1453 | ||
c2756a68 | 1454 | if (u->load_state == UNIT_NOT_FOUND) { |
8eba616f MS |
1455 | u->load_state = UNIT_LOADED; |
1456 | u->load_error = 0; | |
b87705cd LP |
1457 | |
1458 | /* Load in the extras later on, after we | |
1459 | * finished initialization of the unit */ | |
1460 | load_extras = true; | |
ff5f34d0 | 1461 | changed = true; |
8eba616f | 1462 | } |
b08d03ff LP |
1463 | } |
1464 | ||
dd7a22a9 LP |
1465 | w = strdup(what); |
1466 | o = strdup(options); | |
1467 | f = strdup(fstype); | |
1468 | if (!w || !o || !f) { | |
e537352b LP |
1469 | r = -ENOMEM; |
1470 | goto fail; | |
1471 | } | |
1472 | ||
6b1dc2bd | 1473 | p = &MOUNT(u)->parameters_proc_self_mountinfo; |
ff5f34d0 LP |
1474 | |
1475 | changed = changed || | |
1476 | !streq_ptr(p->options, options) || | |
1477 | !streq_ptr(p->what, what) || | |
1478 | !streq_ptr(p->fstype, fstype); | |
1479 | ||
6b1dc2bd LP |
1480 | if (set_flags) { |
1481 | MOUNT(u)->is_mounted = true; | |
1482 | MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo; | |
ff5f34d0 | 1483 | MOUNT(u)->just_changed = changed; |
ef734fd6 | 1484 | } |
f50e0a01 | 1485 | |
6b1dc2bd LP |
1486 | MOUNT(u)->from_proc_self_mountinfo = true; |
1487 | ||
4e85aff4 LP |
1488 | free(p->what); |
1489 | p->what = w; | |
057d9ab8 | 1490 | w = NULL; |
b08d03ff | 1491 | |
4e85aff4 LP |
1492 | free(p->options); |
1493 | p->options = o; | |
057d9ab8 | 1494 | o = NULL; |
e537352b | 1495 | |
4e85aff4 LP |
1496 | free(p->fstype); |
1497 | p->fstype = f; | |
057d9ab8 | 1498 | f = NULL; |
b08d03ff | 1499 | |
b87705cd LP |
1500 | if (load_extras) { |
1501 | r = mount_add_extras(MOUNT(u)); | |
1502 | if (r < 0) | |
1503 | goto fail; | |
1504 | } | |
1505 | ||
ff5f34d0 LP |
1506 | if (changed) |
1507 | unit_add_to_dbus_queue(u); | |
c1e1601e | 1508 | |
b08d03ff LP |
1509 | return 0; |
1510 | ||
1511 | fail: | |
628c89cc LP |
1512 | log_warning_errno(r, "Failed to set up mount unit: %m"); |
1513 | ||
b08d03ff LP |
1514 | if (delete && u) |
1515 | unit_free(u); | |
1516 | ||
4e85aff4 | 1517 | return r; |
b08d03ff LP |
1518 | } |
1519 | ||
ef734fd6 | 1520 | static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { |
628c89cc LP |
1521 | _cleanup_(mnt_free_tablep) struct libmnt_table *t = NULL; |
1522 | _cleanup_(mnt_free_iterp) struct libmnt_iter *i = NULL; | |
60b912f6 | 1523 | int r = 0; |
b08d03ff LP |
1524 | |
1525 | assert(m); | |
1526 | ||
628c89cc LP |
1527 | t = mnt_new_table(); |
1528 | if (!t) | |
8d3ae2bd | 1529 | return log_oom(); |
b08d03ff | 1530 | |
628c89cc LP |
1531 | i = mnt_new_iter(MNT_ITER_FORWARD); |
1532 | if (!i) | |
1533 | return log_oom(); | |
1534 | ||
1535 | r = mnt_table_parse_mtab(t, NULL); | |
5cca8def | 1536 | if (r < 0) |
628c89cc | 1537 | return log_error_errno(r, "Failed to parse /proc/self/mountinfo: %m"); |
e537352b | 1538 | |
5cca8def ZJS |
1539 | r = 0; |
1540 | for (;;) { | |
8d3ae2bd | 1541 | const char *device, *path, *options, *fstype; |
527b7a42 | 1542 | _cleanup_free_ char *d = NULL, *p = NULL; |
628c89cc | 1543 | struct libmnt_fs *fs; |
8d3ae2bd | 1544 | int k; |
b08d03ff | 1545 | |
628c89cc | 1546 | k = mnt_table_next_fs(t, i, &fs); |
5cca8def ZJS |
1547 | if (k == 1) |
1548 | break; | |
628c89cc LP |
1549 | if (k < 0) |
1550 | return log_error_errno(k, "Failed to get next entry from /proc/self/mountinfo: %m"); | |
5cca8def | 1551 | |
8d3ae2bd CL |
1552 | device = mnt_fs_get_source(fs); |
1553 | path = mnt_fs_get_target(fs); | |
1554 | options = mnt_fs_get_options(fs); | |
1555 | fstype = mnt_fs_get_fstype(fs); | |
a2e0f3d3 | 1556 | |
c0a7f8d3 DM |
1557 | if (!device || !path) |
1558 | continue; | |
1559 | ||
527b7a42 | 1560 | if (cunescape(device, UNESCAPE_RELAX, &d) < 0) |
628c89cc LP |
1561 | return log_oom(); |
1562 | ||
527b7a42 | 1563 | if (cunescape(path, UNESCAPE_RELAX, &p) < 0) |
a57f7e2c | 1564 | return log_oom(); |
b08d03ff | 1565 | |
628c89cc LP |
1566 | (void) device_found_node(m, d, true, DEVICE_FOUND_MOUNT, set_flags); |
1567 | ||
1568 | k = mount_setup_unit(m, d, p, options, fstype, set_flags); | |
5cca8def | 1569 | if (r == 0 && k < 0) |
60b912f6 | 1570 | r = k; |
b08d03ff LP |
1571 | } |
1572 | ||
e537352b LP |
1573 | return r; |
1574 | } | |
1575 | ||
1576 | static void mount_shutdown(Manager *m) { | |
d379d442 | 1577 | |
e537352b LP |
1578 | assert(m); |
1579 | ||
718db961 LP |
1580 | m->mount_event_source = sd_event_source_unref(m->mount_event_source); |
1581 | ||
d379d442 KZ |
1582 | mnt_unref_monitor(m->mount_monitor); |
1583 | m->mount_monitor = NULL; | |
b08d03ff LP |
1584 | } |
1585 | ||
68db7a3b ZJS |
1586 | static int mount_get_timeout(Unit *u, uint64_t *timeout) { |
1587 | Mount *m = MOUNT(u); | |
1588 | int r; | |
1589 | ||
1590 | if (!m->timer_event_source) | |
1591 | return 0; | |
1592 | ||
1593 | r = sd_event_source_get_time(m->timer_event_source, timeout); | |
1594 | if (r < 0) | |
1595 | return r; | |
1596 | ||
1597 | return 1; | |
1598 | } | |
1599 | ||
ba64af90 | 1600 | static void mount_enumerate(Manager *m) { |
b08d03ff | 1601 | int r; |
d379d442 | 1602 | |
b08d03ff LP |
1603 | assert(m); |
1604 | ||
8d3ae2bd CL |
1605 | mnt_init_debug(0); |
1606 | ||
d379d442 KZ |
1607 | if (!m->mount_monitor) { |
1608 | int fd; | |
ef734fd6 | 1609 | |
d379d442 KZ |
1610 | m->mount_monitor = mnt_new_monitor(); |
1611 | if (!m->mount_monitor) { | |
ba64af90 | 1612 | log_oom(); |
718db961 | 1613 | goto fail; |
d379d442 | 1614 | } |
29083707 | 1615 | |
d379d442 | 1616 | r = mnt_monitor_enable_kernel(m->mount_monitor, 1); |
ba64af90 LP |
1617 | if (r < 0) { |
1618 | log_error_errno(r, "Failed to enable watching of kernel mount events: %m"); | |
29083707 | 1619 | goto fail; |
ba64af90 LP |
1620 | } |
1621 | ||
d379d442 | 1622 | r = mnt_monitor_enable_userspace(m->mount_monitor, 1, NULL); |
ba64af90 LP |
1623 | if (r < 0) { |
1624 | log_error_errno(r, "Failed to enable watching of userspace mount events: %m"); | |
f7c1ad4f | 1625 | goto fail; |
ba64af90 | 1626 | } |
90598531 | 1627 | |
d379d442 KZ |
1628 | /* mnt_unref_monitor() will close the fd */ |
1629 | fd = r = mnt_monitor_get_fd(m->mount_monitor); | |
ba64af90 LP |
1630 | if (r < 0) { |
1631 | log_error_errno(r, "Failed to acquire watch file descriptor: %m"); | |
f7c1ad4f | 1632 | goto fail; |
ba64af90 | 1633 | } |
befb6d54 | 1634 | |
d379d442 | 1635 | r = sd_event_add_io(m->event, &m->mount_event_source, fd, EPOLLIN, mount_dispatch_io, m); |
ba64af90 LP |
1636 | if (r < 0) { |
1637 | log_error_errno(r, "Failed to watch mount file descriptor: %m"); | |
befb6d54 | 1638 | goto fail; |
ba64af90 | 1639 | } |
befb6d54 | 1640 | |
d379d442 | 1641 | r = sd_event_source_set_priority(m->mount_event_source, -10); |
ba64af90 LP |
1642 | if (r < 0) { |
1643 | log_error_errno(r, "Failed to adjust mount watch priority: %m"); | |
befb6d54 | 1644 | goto fail; |
ba64af90 | 1645 | } |
7dfbe2e3 | 1646 | |
d379d442 | 1647 | (void) sd_event_source_set_description(m->mount_event_source, "mount-monitor-dispatch"); |
befb6d54 CL |
1648 | } |
1649 | ||
e62d8c39 ZJS |
1650 | r = mount_load_proc_self_mountinfo(m, false); |
1651 | if (r < 0) | |
b08d03ff LP |
1652 | goto fail; |
1653 | ||
ba64af90 | 1654 | return; |
b08d03ff LP |
1655 | |
1656 | fail: | |
1657 | mount_shutdown(m); | |
5cb5a6ff LP |
1658 | } |
1659 | ||
718db961 | 1660 | static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
fcd8b266 | 1661 | _cleanup_set_free_ Set *around = NULL, *gone = NULL; |
718db961 | 1662 | Manager *m = userdata; |
fcd8b266 LP |
1663 | const char *what; |
1664 | Iterator i; | |
595ed347 | 1665 | Unit *u; |
ef734fd6 LP |
1666 | int r; |
1667 | ||
1668 | assert(m); | |
d379d442 | 1669 | assert(revents & EPOLLIN); |
ef734fd6 | 1670 | |
d379d442 | 1671 | if (fd == mnt_monitor_get_fd(m->mount_monitor)) { |
df63dda6 | 1672 | bool rescan = false; |
befb6d54 | 1673 | |
d379d442 KZ |
1674 | /* Drain all events and verify that the event is valid. |
1675 | * | |
1676 | * Note that libmount also monitors /run/mount mkdir if the | |
1677 | * directory does not exist yet. The mkdir may generate event | |
1678 | * which is irrelevant for us. | |
1679 | * | |
1680 | * error: r < 0; valid: r == 0, false positive: rc == 1 */ | |
1681 | do { | |
1682 | r = mnt_monitor_next_change(m->mount_monitor, NULL, NULL); | |
1683 | if (r == 0) | |
1684 | rescan = true; | |
1685 | else if (r < 0) | |
1686 | return log_error_errno(r, "Failed to drain libmount events"); | |
1687 | } while (r == 0); | |
1688 | ||
1689 | log_debug("libmount event [rescan: %s]", yes_no(rescan)); | |
befb6d54 CL |
1690 | if (!rescan) |
1691 | return 0; | |
1692 | } | |
ef734fd6 | 1693 | |
4f0eedb7 ZJS |
1694 | r = mount_load_proc_self_mountinfo(m, true); |
1695 | if (r < 0) { | |
e537352b | 1696 | /* Reset flags, just in case, for later calls */ |
595ed347 MS |
1697 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) { |
1698 | Mount *mount = MOUNT(u); | |
e537352b LP |
1699 | |
1700 | mount->is_mounted = mount->just_mounted = mount->just_changed = false; | |
1701 | } | |
1702 | ||
718db961 | 1703 | return 0; |
ef734fd6 LP |
1704 | } |
1705 | ||
1706 | manager_dispatch_load_queue(m); | |
1707 | ||
595ed347 MS |
1708 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) { |
1709 | Mount *mount = MOUNT(u); | |
ef734fd6 | 1710 | |
e537352b | 1711 | if (!mount->is_mounted) { |
e537352b | 1712 | |
394763f6 LP |
1713 | /* A mount point is not around right now. It |
1714 | * might be gone, or might never have | |
1715 | * existed. */ | |
1716 | ||
1717 | if (mount->from_proc_self_mountinfo && | |
1718 | mount->parameters_proc_self_mountinfo.what) { | |
1719 | ||
1720 | /* Remember that this device might just have disappeared */ | |
1721 | if (set_ensure_allocated(&gone, &string_hash_ops) < 0 || | |
1722 | set_put(gone, mount->parameters_proc_self_mountinfo.what) < 0) | |
1723 | log_oom(); /* we don't care too much about OOM here... */ | |
1724 | } | |
fcd8b266 | 1725 | |
ef734fd6 | 1726 | mount->from_proc_self_mountinfo = false; |
e537352b LP |
1727 | |
1728 | switch (mount->state) { | |
1729 | ||
1730 | case MOUNT_MOUNTED: | |
aef83136 LP |
1731 | /* This has just been unmounted by |
1732 | * somebody else, follow the state | |
1733 | * change. */ | |
9d2f5178 | 1734 | mount_enter_dead(mount, MOUNT_SUCCESS); |
e537352b LP |
1735 | break; |
1736 | ||
1737 | default: | |
e537352b | 1738 | break; |
e537352b LP |
1739 | } |
1740 | ||
1741 | } else if (mount->just_mounted || mount->just_changed) { | |
1742 | ||
fcd8b266 | 1743 | /* A mount point was added or changed */ |
e537352b LP |
1744 | |
1745 | switch (mount->state) { | |
1746 | ||
1747 | case MOUNT_DEAD: | |
fdf20a31 | 1748 | case MOUNT_FAILED: |
aef83136 LP |
1749 | /* This has just been mounted by |
1750 | * somebody else, follow the state | |
1751 | * change. */ | |
9d2f5178 | 1752 | mount_enter_mounted(mount, MOUNT_SUCCESS); |
e537352b LP |
1753 | break; |
1754 | ||
1755 | case MOUNT_MOUNTING: | |
5bcb0f2b | 1756 | mount_set_state(mount, MOUNT_MOUNTING_DONE); |
e537352b LP |
1757 | break; |
1758 | ||
1759 | default: | |
1760 | /* Nothing really changed, but let's | |
1761 | * issue an notification call | |
1762 | * nonetheless, in case somebody is | |
1763 | * waiting for this. (e.g. file system | |
1764 | * ro/rw remounts.) */ | |
1765 | mount_set_state(mount, mount->state); | |
1766 | break; | |
1767 | } | |
394763f6 | 1768 | } |
fcd8b266 | 1769 | |
394763f6 LP |
1770 | if (mount->is_mounted && |
1771 | mount->from_proc_self_mountinfo && | |
1772 | mount->parameters_proc_self_mountinfo.what) { | |
fcd8b266 | 1773 | |
394763f6 LP |
1774 | if (set_ensure_allocated(&around, &string_hash_ops) < 0 || |
1775 | set_put(around, mount->parameters_proc_self_mountinfo.what) < 0) | |
1776 | log_oom(); | |
e537352b LP |
1777 | } |
1778 | ||
1779 | /* Reset the flags for later calls */ | |
1780 | mount->is_mounted = mount->just_mounted = mount->just_changed = false; | |
1781 | } | |
718db961 | 1782 | |
fcd8b266 LP |
1783 | SET_FOREACH(what, gone, i) { |
1784 | if (set_contains(around, what)) | |
1785 | continue; | |
1786 | ||
1787 | /* Let the device units know that the device is no longer mounted */ | |
1788 | (void) device_found_node(m, what, false, DEVICE_FOUND_MOUNT, true); | |
1789 | } | |
1790 | ||
718db961 | 1791 | return 0; |
e537352b LP |
1792 | } |
1793 | ||
fdf20a31 | 1794 | static void mount_reset_failed(Unit *u) { |
5632e374 LP |
1795 | Mount *m = MOUNT(u); |
1796 | ||
1797 | assert(m); | |
1798 | ||
fdf20a31 | 1799 | if (m->state == MOUNT_FAILED) |
5632e374 LP |
1800 | mount_set_state(m, MOUNT_DEAD); |
1801 | ||
9d2f5178 LP |
1802 | m->result = MOUNT_SUCCESS; |
1803 | m->reload_result = MOUNT_SUCCESS; | |
5632e374 LP |
1804 | } |
1805 | ||
718db961 | 1806 | static int mount_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { |
814cc562 | 1807 | return unit_kill_common(u, who, signo, -1, MOUNT(u)->control_pid, error); |
8a0867d6 LP |
1808 | } |
1809 | ||
a16e1123 LP |
1810 | static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = { |
1811 | [MOUNT_EXEC_MOUNT] = "ExecMount", | |
1812 | [MOUNT_EXEC_UNMOUNT] = "ExecUnmount", | |
1813 | [MOUNT_EXEC_REMOUNT] = "ExecRemount", | |
1814 | }; | |
1815 | ||
1816 | DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand); | |
1817 | ||
9d2f5178 LP |
1818 | static const char* const mount_result_table[_MOUNT_RESULT_MAX] = { |
1819 | [MOUNT_SUCCESS] = "success", | |
1820 | [MOUNT_FAILURE_RESOURCES] = "resources", | |
1821 | [MOUNT_FAILURE_TIMEOUT] = "timeout", | |
1822 | [MOUNT_FAILURE_EXIT_CODE] = "exit-code", | |
1823 | [MOUNT_FAILURE_SIGNAL] = "signal", | |
1824 | [MOUNT_FAILURE_CORE_DUMP] = "core-dump" | |
1825 | }; | |
1826 | ||
1827 | DEFINE_STRING_TABLE_LOOKUP(mount_result, MountResult); | |
1828 | ||
87f0e418 | 1829 | const UnitVTable mount_vtable = { |
7d17cfbc | 1830 | .object_size = sizeof(Mount), |
718db961 LP |
1831 | .exec_context_offset = offsetof(Mount, exec_context), |
1832 | .cgroup_context_offset = offsetof(Mount, cgroup_context), | |
1833 | .kill_context_offset = offsetof(Mount, kill_context), | |
613b411c | 1834 | .exec_runtime_offset = offsetof(Mount, exec_runtime), |
3ef63c31 | 1835 | |
f975e971 LP |
1836 | .sections = |
1837 | "Unit\0" | |
1838 | "Mount\0" | |
1839 | "Install\0", | |
4ad49000 | 1840 | .private_section = "Mount", |
71645aca | 1841 | |
e537352b | 1842 | .no_alias = true, |
9e2f7c11 | 1843 | .no_instances = true, |
e537352b LP |
1844 | |
1845 | .init = mount_init, | |
1846 | .load = mount_load, | |
034c6ed7 | 1847 | .done = mount_done, |
e537352b | 1848 | |
f50e0a01 LP |
1849 | .coldplug = mount_coldplug, |
1850 | ||
034c6ed7 | 1851 | .dump = mount_dump, |
5cb5a6ff | 1852 | |
e537352b LP |
1853 | .start = mount_start, |
1854 | .stop = mount_stop, | |
1855 | .reload = mount_reload, | |
1856 | ||
8a0867d6 LP |
1857 | .kill = mount_kill, |
1858 | ||
a16e1123 LP |
1859 | .serialize = mount_serialize, |
1860 | .deserialize_item = mount_deserialize_item, | |
1861 | ||
f50e0a01 | 1862 | .active_state = mount_active_state, |
10a94420 | 1863 | .sub_state_to_string = mount_sub_state_to_string, |
b08d03ff | 1864 | |
701cc384 LP |
1865 | .check_gc = mount_check_gc, |
1866 | ||
e537352b | 1867 | .sigchld_event = mount_sigchld_event, |
e537352b | 1868 | |
fdf20a31 | 1869 | .reset_failed = mount_reset_failed, |
5632e374 | 1870 | |
718db961 | 1871 | .bus_vtable = bus_mount_vtable, |
74c964d3 LP |
1872 | .bus_set_property = bus_mount_set_property, |
1873 | .bus_commit_properties = bus_mount_commit_properties, | |
4139c1b2 | 1874 | |
68db7a3b ZJS |
1875 | .get_timeout = mount_get_timeout, |
1876 | ||
0e252f6b TG |
1877 | .can_transient = true, |
1878 | ||
f50e0a01 | 1879 | .enumerate = mount_enumerate, |
c6918296 MS |
1880 | .shutdown = mount_shutdown, |
1881 | ||
1882 | .status_message_formats = { | |
1883 | .starting_stopping = { | |
1884 | [0] = "Mounting %s...", | |
1885 | [1] = "Unmounting %s...", | |
1886 | }, | |
1887 | .finished_start_job = { | |
1888 | [JOB_DONE] = "Mounted %s.", | |
1889 | [JOB_FAILED] = "Failed to mount %s.", | |
c6918296 MS |
1890 | [JOB_TIMEOUT] = "Timed out mounting %s.", |
1891 | }, | |
1892 | .finished_stop_job = { | |
1893 | [JOB_DONE] = "Unmounted %s.", | |
1894 | [JOB_FAILED] = "Failed unmounting %s.", | |
1895 | [JOB_TIMEOUT] = "Timed out unmounting %s.", | |
1896 | }, | |
1897 | }, | |
5cb5a6ff | 1898 | }; |