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Commit | Line | Data |
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87f0e418 LP |
1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ |
2 | ||
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
87f0e418 LP |
22 | #include <assert.h> |
23 | #include <errno.h> | |
24 | #include <string.h> | |
25 | #include <sys/epoll.h> | |
26 | #include <sys/timerfd.h> | |
27 | #include <sys/poll.h> | |
0301abf4 LP |
28 | #include <stdlib.h> |
29 | #include <unistd.h> | |
87f0e418 LP |
30 | |
31 | #include "set.h" | |
32 | #include "unit.h" | |
33 | #include "macro.h" | |
34 | #include "strv.h" | |
35 | #include "load-fragment.h" | |
36 | #include "load-dropin.h" | |
37 | #include "log.h" | |
9e2f7c11 LP |
38 | #include "unit-name.h" |
39 | #include "specifier.h" | |
4139c1b2 | 40 | #include "dbus-unit.h" |
514f4ef5 | 41 | #include "special.h" |
87f0e418 LP |
42 | |
43 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
44 | [UNIT_SERVICE] = &service_vtable, | |
45 | [UNIT_TIMER] = &timer_vtable, | |
46 | [UNIT_SOCKET] = &socket_vtable, | |
47 | [UNIT_TARGET] = &target_vtable, | |
48 | [UNIT_DEVICE] = &device_vtable, | |
49 | [UNIT_MOUNT] = &mount_vtable, | |
50 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
07b0b134 | 51 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
01f78473 LP |
52 | [UNIT_SWAP] = &swap_vtable, |
53 | [UNIT_PATH] = &path_vtable | |
87f0e418 LP |
54 | }; |
55 | ||
87f0e418 LP |
56 | Unit *unit_new(Manager *m) { |
57 | Unit *u; | |
58 | ||
59 | assert(m); | |
60 | ||
61 | if (!(u = new0(Unit, 1))) | |
62 | return NULL; | |
63 | ||
64 | if (!(u->meta.names = set_new(string_hash_func, string_compare_func))) { | |
65 | free(u); | |
66 | return NULL; | |
67 | } | |
68 | ||
69 | u->meta.manager = m; | |
70 | u->meta.type = _UNIT_TYPE_INVALID; | |
cca098b0 | 71 | u->meta.deserialized_job = _JOB_TYPE_INVALID; |
87f0e418 LP |
72 | |
73 | return u; | |
74 | } | |
75 | ||
f278026d LP |
76 | bool unit_has_name(Unit *u, const char *name) { |
77 | assert(u); | |
78 | assert(name); | |
79 | ||
80 | return !!set_get(u->meta.names, (char*) name); | |
81 | } | |
82 | ||
87f0e418 LP |
83 | int unit_add_name(Unit *u, const char *text) { |
84 | UnitType t; | |
9e2f7c11 | 85 | char *s = NULL, *i = NULL; |
87f0e418 LP |
86 | int r; |
87 | ||
88 | assert(u); | |
89 | assert(text); | |
90 | ||
9e2f7c11 LP |
91 | if (unit_name_is_template(text)) { |
92 | if (!u->meta.instance) | |
93 | return -EINVAL; | |
87f0e418 | 94 | |
9e2f7c11 LP |
95 | s = unit_name_replace_instance(text, u->meta.instance); |
96 | } else | |
97 | s = strdup(text); | |
87f0e418 | 98 | |
9e2f7c11 LP |
99 | if (!s) |
100 | return -ENOMEM; | |
87f0e418 | 101 | |
9e2f7c11 LP |
102 | if (!unit_name_is_valid(s)) { |
103 | r = -EINVAL; | |
104 | goto fail; | |
105 | } | |
e537352b | 106 | |
9e2f7c11 | 107 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 108 | |
9e2f7c11 LP |
109 | if (u->meta.type != _UNIT_TYPE_INVALID && t != u->meta.type) { |
110 | r = -EINVAL; | |
111 | goto fail; | |
112 | } | |
87f0e418 | 113 | |
9e2f7c11 LP |
114 | if ((r = unit_name_to_instance(s, &i)) < 0) |
115 | goto fail; | |
87f0e418 | 116 | |
9e2f7c11 LP |
117 | if (i && unit_vtable[t]->no_instances) |
118 | goto fail; | |
119 | ||
120 | if (u->meta.type != _UNIT_TYPE_INVALID && !streq_ptr(u->meta.instance, i)) { | |
121 | r = -EINVAL; | |
122 | goto fail; | |
123 | } | |
124 | ||
125 | if (unit_vtable[t]->no_alias && | |
126 | !set_isempty(u->meta.names) && | |
127 | !set_get(u->meta.names, s)) { | |
128 | r = -EEXIST; | |
129 | goto fail; | |
130 | } | |
131 | ||
4f0f902f LP |
132 | if (hashmap_size(u->meta.manager->units) >= MANAGER_MAX_NAMES) { |
133 | r = -E2BIG; | |
134 | goto fail; | |
135 | } | |
136 | ||
9e2f7c11 LP |
137 | if ((r = set_put(u->meta.names, s)) < 0) { |
138 | if (r == -EEXIST) | |
139 | r = 0; | |
140 | goto fail; | |
87f0e418 LP |
141 | } |
142 | ||
143 | if ((r = hashmap_put(u->meta.manager->units, s, u)) < 0) { | |
144 | set_remove(u->meta.names, s); | |
9e2f7c11 | 145 | goto fail; |
87f0e418 LP |
146 | } |
147 | ||
e537352b | 148 | if (u->meta.type == _UNIT_TYPE_INVALID) { |
ef734fd6 | 149 | |
e537352b | 150 | u->meta.type = t; |
9e2f7c11 LP |
151 | u->meta.id = s; |
152 | u->meta.instance = i; | |
153 | ||
154 | LIST_PREPEND(Meta, units_per_type, u->meta.manager->units_per_type[t], &u->meta); | |
e537352b LP |
155 | |
156 | if (UNIT_VTABLE(u)->init) | |
157 | UNIT_VTABLE(u)->init(u); | |
9e2f7c11 LP |
158 | } else |
159 | free(i); | |
87f0e418 | 160 | |
c1e1601e | 161 | unit_add_to_dbus_queue(u); |
87f0e418 | 162 | return 0; |
9e2f7c11 LP |
163 | |
164 | fail: | |
165 | free(s); | |
166 | free(i); | |
167 | ||
168 | return r; | |
87f0e418 LP |
169 | } |
170 | ||
0ae97ec1 | 171 | int unit_choose_id(Unit *u, const char *name) { |
9e2f7c11 | 172 | char *s, *t = NULL; |
0ae97ec1 LP |
173 | |
174 | assert(u); | |
175 | assert(name); | |
176 | ||
9e2f7c11 LP |
177 | if (unit_name_is_template(name)) { |
178 | ||
179 | if (!u->meta.instance) | |
180 | return -EINVAL; | |
181 | ||
182 | if (!(t = unit_name_replace_instance(name, u->meta.instance))) | |
183 | return -ENOMEM; | |
184 | ||
185 | name = t; | |
186 | } | |
187 | ||
0ae97ec1 | 188 | /* Selects one of the names of this unit as the id */ |
9e2f7c11 LP |
189 | s = set_get(u->meta.names, (char*) name); |
190 | free(t); | |
0ae97ec1 | 191 | |
9e2f7c11 | 192 | if (!s) |
0ae97ec1 LP |
193 | return -ENOENT; |
194 | ||
195 | u->meta.id = s; | |
c1e1601e | 196 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 197 | |
0ae97ec1 LP |
198 | return 0; |
199 | } | |
200 | ||
f50e0a01 LP |
201 | int unit_set_description(Unit *u, const char *description) { |
202 | char *s; | |
203 | ||
204 | assert(u); | |
205 | ||
206 | if (!(s = strdup(description))) | |
207 | return -ENOMEM; | |
208 | ||
209 | free(u->meta.description); | |
210 | u->meta.description = s; | |
c1e1601e LP |
211 | |
212 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
213 | return 0; |
214 | } | |
215 | ||
701cc384 LP |
216 | bool unit_check_gc(Unit *u) { |
217 | assert(u); | |
218 | ||
b86d44e5 LP |
219 | if (u->meta.load_state == UNIT_STUB) |
220 | return true; | |
221 | ||
701cc384 LP |
222 | if (UNIT_VTABLE(u)->no_gc) |
223 | return true; | |
224 | ||
225 | if (u->meta.job) | |
226 | return true; | |
227 | ||
228 | if (unit_active_state(u) != UNIT_INACTIVE) | |
229 | return true; | |
230 | ||
231 | if (UNIT_VTABLE(u)->check_gc) | |
232 | if (UNIT_VTABLE(u)->check_gc(u)) | |
233 | return true; | |
234 | ||
235 | return false; | |
236 | } | |
237 | ||
87f0e418 LP |
238 | void unit_add_to_load_queue(Unit *u) { |
239 | assert(u); | |
819e213f | 240 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
87f0e418 LP |
241 | |
242 | if (u->meta.load_state != UNIT_STUB || u->meta.in_load_queue) | |
243 | return; | |
244 | ||
245 | LIST_PREPEND(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
246 | u->meta.in_load_queue = true; | |
247 | } | |
248 | ||
23a177ef LP |
249 | void unit_add_to_cleanup_queue(Unit *u) { |
250 | assert(u); | |
251 | ||
252 | if (u->meta.in_cleanup_queue) | |
253 | return; | |
254 | ||
255 | LIST_PREPEND(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta); | |
256 | u->meta.in_cleanup_queue = true; | |
257 | } | |
258 | ||
701cc384 LP |
259 | void unit_add_to_gc_queue(Unit *u) { |
260 | assert(u); | |
261 | ||
262 | if (u->meta.in_gc_queue || u->meta.in_cleanup_queue) | |
263 | return; | |
264 | ||
265 | if (unit_check_gc(u)) | |
266 | return; | |
267 | ||
268 | LIST_PREPEND(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta); | |
269 | u->meta.in_gc_queue = true; | |
270 | ||
271 | u->meta.manager->n_in_gc_queue ++; | |
272 | ||
273 | if (u->meta.manager->gc_queue_timestamp <= 0) | |
274 | u->meta.manager->gc_queue_timestamp = now(CLOCK_MONOTONIC); | |
275 | } | |
276 | ||
c1e1601e LP |
277 | void unit_add_to_dbus_queue(Unit *u) { |
278 | assert(u); | |
819e213f | 279 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
c1e1601e | 280 | |
94b6dfa2 | 281 | if (u->meta.load_state == UNIT_STUB || u->meta.in_dbus_queue) |
c1e1601e LP |
282 | return; |
283 | ||
94b6dfa2 LP |
284 | if (set_isempty(u->meta.manager->subscribed)) { |
285 | u->meta.sent_dbus_new_signal = true; | |
286 | return; | |
287 | } | |
288 | ||
c1e1601e LP |
289 | LIST_PREPEND(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); |
290 | u->meta.in_dbus_queue = true; | |
291 | } | |
292 | ||
87f0e418 LP |
293 | static void bidi_set_free(Unit *u, Set *s) { |
294 | Iterator i; | |
295 | Unit *other; | |
296 | ||
297 | assert(u); | |
298 | ||
299 | /* Frees the set and makes sure we are dropped from the | |
300 | * inverse pointers */ | |
301 | ||
302 | SET_FOREACH(other, s, i) { | |
303 | UnitDependency d; | |
304 | ||
305 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
306 | set_remove(other->meta.dependencies[d], u); | |
701cc384 LP |
307 | |
308 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
309 | } |
310 | ||
311 | set_free(s); | |
312 | } | |
313 | ||
314 | void unit_free(Unit *u) { | |
315 | UnitDependency d; | |
316 | Iterator i; | |
317 | char *t; | |
318 | ||
319 | assert(u); | |
320 | ||
c1e1601e LP |
321 | bus_unit_send_removed_signal(u); |
322 | ||
a013b84b LP |
323 | if (u->meta.load_state != UNIT_STUB) |
324 | if (UNIT_VTABLE(u)->done) | |
325 | UNIT_VTABLE(u)->done(u); | |
326 | ||
87f0e418 LP |
327 | SET_FOREACH(t, u->meta.names, i) |
328 | hashmap_remove_value(u->meta.manager->units, t, u); | |
329 | ||
964e0949 LP |
330 | if (u->meta.job) |
331 | job_free(u->meta.job); | |
332 | ||
333 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
334 | bidi_set_free(u, u->meta.dependencies[d]); | |
335 | ||
ef734fd6 LP |
336 | if (u->meta.type != _UNIT_TYPE_INVALID) |
337 | LIST_REMOVE(Meta, units_per_type, u->meta.manager->units_per_type[u->meta.type], &u->meta); | |
338 | ||
87f0e418 LP |
339 | if (u->meta.in_load_queue) |
340 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
341 | ||
c1e1601e LP |
342 | if (u->meta.in_dbus_queue) |
343 | LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); | |
344 | ||
23a177ef LP |
345 | if (u->meta.in_cleanup_queue) |
346 | LIST_REMOVE(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta); | |
347 | ||
701cc384 LP |
348 | if (u->meta.in_gc_queue) { |
349 | LIST_REMOVE(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta); | |
350 | u->meta.manager->n_in_gc_queue--; | |
351 | } | |
352 | ||
e537352b | 353 | cgroup_bonding_free_list(u->meta.cgroup_bondings); |
87f0e418 | 354 | |
87f0e418 | 355 | free(u->meta.description); |
6be1e7d5 | 356 | free(u->meta.fragment_path); |
87f0e418 | 357 | |
53ec43c6 | 358 | set_free_free(u->meta.names); |
87f0e418 | 359 | |
9e2f7c11 LP |
360 | free(u->meta.instance); |
361 | ||
87f0e418 LP |
362 | free(u); |
363 | } | |
364 | ||
365 | UnitActiveState unit_active_state(Unit *u) { | |
366 | assert(u); | |
367 | ||
6124958c LP |
368 | if (u->meta.load_state == UNIT_MERGED) |
369 | return unit_active_state(unit_follow_merge(u)); | |
370 | ||
371 | /* After a reload it might happen that a unit is not correctly | |
372 | * loaded but still has a process around. That's why we won't | |
373 | * shortcut failed loading to UNIT_INACTIVE_MAINTENANCE. */ | |
87f0e418 LP |
374 | |
375 | return UNIT_VTABLE(u)->active_state(u); | |
376 | } | |
377 | ||
10a94420 LP |
378 | const char* unit_sub_state_to_string(Unit *u) { |
379 | assert(u); | |
380 | ||
381 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
382 | } | |
383 | ||
23a177ef LP |
384 | static void complete_move(Set **s, Set **other) { |
385 | assert(s); | |
386 | assert(other); | |
87f0e418 | 387 | |
23a177ef LP |
388 | if (!*other) |
389 | return; | |
87f0e418 LP |
390 | |
391 | if (*s) | |
23a177ef LP |
392 | set_move(*s, *other); |
393 | else { | |
394 | *s = *other; | |
395 | *other = NULL; | |
396 | } | |
397 | } | |
87f0e418 | 398 | |
23a177ef LP |
399 | static void merge_names(Unit *u, Unit *other) { |
400 | char *t; | |
401 | Iterator i; | |
87f0e418 | 402 | |
23a177ef LP |
403 | assert(u); |
404 | assert(other); | |
405 | ||
406 | complete_move(&u->meta.names, &other->meta.names); | |
407 | ||
53ec43c6 | 408 | set_free_free(other->meta.names); |
23a177ef LP |
409 | other->meta.names = NULL; |
410 | other->meta.id = NULL; | |
411 | ||
412 | SET_FOREACH(t, u->meta.names, i) | |
413 | assert_se(hashmap_replace(u->meta.manager->units, t, u) == 0); | |
87f0e418 LP |
414 | } |
415 | ||
23a177ef LP |
416 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
417 | Iterator i; | |
418 | Unit *back; | |
87f0e418 | 419 | int r; |
23a177ef LP |
420 | |
421 | assert(u); | |
422 | assert(other); | |
423 | assert(d < _UNIT_DEPENDENCY_MAX); | |
424 | ||
425 | SET_FOREACH(back, other->meta.dependencies[d], i) { | |
426 | UnitDependency k; | |
427 | ||
428 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) | |
429 | if ((r = set_remove_and_put(back->meta.dependencies[k], other, u)) < 0) { | |
430 | ||
431 | if (r == -EEXIST) | |
432 | set_remove(back->meta.dependencies[k], other); | |
433 | else | |
434 | assert(r == -ENOENT); | |
435 | } | |
436 | } | |
437 | ||
438 | complete_move(&u->meta.dependencies[d], &other->meta.dependencies[d]); | |
439 | ||
440 | set_free(other->meta.dependencies[d]); | |
441 | other->meta.dependencies[d] = NULL; | |
442 | } | |
443 | ||
444 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
445 | UnitDependency d; |
446 | ||
447 | assert(u); | |
448 | assert(other); | |
449 | assert(u->meta.manager == other->meta.manager); | |
9e2f7c11 | 450 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
87f0e418 | 451 | |
cc916967 LP |
452 | other = unit_follow_merge(other); |
453 | ||
23a177ef LP |
454 | if (other == u) |
455 | return 0; | |
456 | ||
9e2f7c11 LP |
457 | if (u->meta.type != other->meta.type) |
458 | return -EINVAL; | |
459 | ||
460 | if (!streq_ptr(u->meta.instance, other->meta.instance)) | |
87f0e418 LP |
461 | return -EINVAL; |
462 | ||
cc916967 LP |
463 | if (other->meta.load_state != UNIT_STUB && |
464 | other->meta.load_state != UNIT_FAILED) | |
23a177ef | 465 | return -EEXIST; |
87f0e418 | 466 | |
819e213f LP |
467 | if (other->meta.job) |
468 | return -EEXIST; | |
469 | ||
6124958c | 470 | if (!UNIT_IS_INACTIVE_OR_MAINTENANCE(unit_active_state(other))) |
819e213f LP |
471 | return -EEXIST; |
472 | ||
87f0e418 | 473 | /* Merge names */ |
23a177ef | 474 | merge_names(u, other); |
87f0e418 LP |
475 | |
476 | /* Merge dependencies */ | |
477 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 478 | merge_dependencies(u, other, d); |
87f0e418 | 479 | |
23a177ef LP |
480 | other->meta.load_state = UNIT_MERGED; |
481 | other->meta.merged_into = u; | |
482 | ||
3616a49c LP |
483 | /* If there is still some data attached to the other node, we |
484 | * don't need it anymore, and can free it. */ | |
485 | if (other->meta.load_state != UNIT_STUB) | |
486 | if (UNIT_VTABLE(other)->done) | |
487 | UNIT_VTABLE(other)->done(other); | |
488 | ||
489 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
490 | unit_add_to_cleanup_queue(other); |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
495 | int unit_merge_by_name(Unit *u, const char *name) { | |
496 | Unit *other; | |
9e2f7c11 LP |
497 | int r; |
498 | char *s = NULL; | |
23a177ef LP |
499 | |
500 | assert(u); | |
501 | assert(name); | |
502 | ||
9e2f7c11 LP |
503 | if (unit_name_is_template(name)) { |
504 | if (!u->meta.instance) | |
505 | return -EINVAL; | |
506 | ||
507 | if (!(s = unit_name_replace_instance(name, u->meta.instance))) | |
508 | return -ENOMEM; | |
509 | ||
510 | name = s; | |
511 | } | |
512 | ||
23a177ef | 513 | if (!(other = manager_get_unit(u->meta.manager, name))) |
9e2f7c11 LP |
514 | r = unit_add_name(u, name); |
515 | else | |
516 | r = unit_merge(u, other); | |
23a177ef | 517 | |
9e2f7c11 LP |
518 | free(s); |
519 | return r; | |
23a177ef LP |
520 | } |
521 | ||
522 | Unit* unit_follow_merge(Unit *u) { | |
523 | assert(u); | |
524 | ||
525 | while (u->meta.load_state == UNIT_MERGED) | |
526 | assert_se(u = u->meta.merged_into); | |
527 | ||
528 | return u; | |
529 | } | |
530 | ||
531 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
532 | int r; | |
533 | ||
534 | assert(u); | |
535 | assert(c); | |
536 | ||
ecc6e2b8 LP |
537 | if (c->std_output != EXEC_OUTPUT_KMSG && |
538 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
539 | c->std_error != EXEC_OUTPUT_KMSG && | |
540 | c->std_error != EXEC_OUTPUT_SYSLOG) | |
23a177ef LP |
541 | return 0; |
542 | ||
543 | /* If syslog or kernel logging is requested, make sure our own | |
544 | * logging daemon is run first. */ | |
545 | ||
701cc384 | 546 | if ((r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0) |
23a177ef LP |
547 | return r; |
548 | ||
a3d4e06d | 549 | if (u->meta.manager->running_as == MANAGER_SYSTEM) |
701cc384 | 550 | if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0) |
23a177ef LP |
551 | return r; |
552 | ||
87f0e418 LP |
553 | return 0; |
554 | } | |
555 | ||
87f0e418 LP |
556 | const char *unit_description(Unit *u) { |
557 | assert(u); | |
558 | ||
559 | if (u->meta.description) | |
560 | return u->meta.description; | |
561 | ||
9e2f7c11 | 562 | return u->meta.id; |
87f0e418 LP |
563 | } |
564 | ||
565 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
87f0e418 LP |
566 | char *t; |
567 | UnitDependency d; | |
568 | Iterator i; | |
47be870b LP |
569 | char *p2; |
570 | const char *prefix2; | |
8e274523 | 571 | CGroupBonding *b; |
173e3821 LP |
572 | char |
573 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
574 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
575 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
576 | timestamp4[FORMAT_TIMESTAMP_MAX]; | |
87f0e418 LP |
577 | |
578 | assert(u); | |
9e2f7c11 | 579 | assert(u->meta.type >= 0); |
87f0e418 LP |
580 | |
581 | if (!prefix) | |
582 | prefix = ""; | |
47be870b LP |
583 | p2 = strappend(prefix, "\t"); |
584 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
585 | |
586 | fprintf(f, | |
40d50879 | 587 | "%s-> Unit %s:\n" |
87f0e418 | 588 | "%s\tDescription: %s\n" |
9e2f7c11 | 589 | "%s\tInstance: %s\n" |
87f0e418 | 590 | "%s\tUnit Load State: %s\n" |
2fad8195 | 591 | "%s\tUnit Active State: %s\n" |
173e3821 | 592 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 593 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 594 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 595 | "%s\tInactive Enter Timestamp: %s\n" |
bc0f8771 LP |
596 | "%s\tGC Check Good: %s\n" |
597 | "%s\tOnly By Dependency: %s\n", | |
9e2f7c11 | 598 | prefix, u->meta.id, |
87f0e418 | 599 | prefix, unit_description(u), |
9e2f7c11 | 600 | prefix, strna(u->meta.instance), |
94f04347 | 601 | prefix, unit_load_state_to_string(u->meta.load_state), |
2fad8195 | 602 | prefix, unit_active_state_to_string(unit_active_state(u)), |
871d7de4 LP |
603 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.inactive_exit_timestamp.realtime)), |
604 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_enter_timestamp.realtime)), | |
605 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->meta.active_exit_timestamp.realtime)), | |
606 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->meta.inactive_enter_timestamp.realtime)), | |
bc0f8771 LP |
607 | prefix, yes_no(unit_check_gc(u)), |
608 | prefix, yes_no(u->meta.only_by_dependency)); | |
0301abf4 | 609 | |
87f0e418 LP |
610 | SET_FOREACH(t, u->meta.names, i) |
611 | fprintf(f, "%s\tName: %s\n", prefix, t); | |
612 | ||
23a177ef LP |
613 | if (u->meta.fragment_path) |
614 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path); | |
615 | ||
87f0e418 LP |
616 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
617 | Unit *other; | |
618 | ||
87f0e418 | 619 | SET_FOREACH(other, u->meta.dependencies[d], i) |
9e2f7c11 | 620 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->meta.id); |
87f0e418 LP |
621 | } |
622 | ||
23a177ef | 623 | if (u->meta.load_state == UNIT_LOADED) { |
b0650475 LP |
624 | fprintf(f, |
625 | "%s\tRecursive Stop: %s\n" | |
626 | "%s\tStop When Unneeded: %s\n", | |
627 | prefix, yes_no(u->meta.recursive_stop), | |
628 | prefix, yes_no(u->meta.stop_when_unneeded)); | |
629 | ||
23a177ef LP |
630 | LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings) |
631 | fprintf(f, "%s\tControlGroup: %s:%s\n", | |
632 | prefix, b->controller, b->path); | |
8e274523 | 633 | |
23a177ef LP |
634 | if (UNIT_VTABLE(u)->dump) |
635 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 LP |
636 | |
637 | } else if (u->meta.load_state == UNIT_MERGED) | |
638 | fprintf(f, | |
639 | "%s\tMerged into: %s\n", | |
9e2f7c11 | 640 | prefix, u->meta.merged_into->meta.id); |
87f0e418 LP |
641 | |
642 | if (u->meta.job) | |
643 | job_dump(u->meta.job, f, prefix2); | |
644 | ||
47be870b | 645 | free(p2); |
87f0e418 LP |
646 | } |
647 | ||
648 | /* Common implementation for multiple backends */ | |
e537352b | 649 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
650 | int r; |
651 | ||
652 | assert(u); | |
23a177ef LP |
653 | |
654 | /* Load a .service file */ | |
e537352b | 655 | if ((r = unit_load_fragment(u)) < 0) |
23a177ef LP |
656 | return r; |
657 | ||
e537352b | 658 | if (u->meta.load_state == UNIT_STUB) |
23a177ef LP |
659 | return -ENOENT; |
660 | ||
661 | /* Load drop-in directory data */ | |
662 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
663 | return r; | |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
668 | /* Common implementation for multiple backends */ | |
e537352b | 669 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 670 | int r; |
87f0e418 LP |
671 | |
672 | assert(u); | |
673 | ||
23a177ef LP |
674 | /* Same as unit_load_fragment_and_dropin(), but whether |
675 | * something can be loaded or not doesn't matter. */ | |
676 | ||
677 | /* Load a .service file */ | |
e537352b | 678 | if ((r = unit_load_fragment(u)) < 0) |
87f0e418 LP |
679 | return r; |
680 | ||
e537352b LP |
681 | if (u->meta.load_state == UNIT_STUB) |
682 | u->meta.load_state = UNIT_LOADED; | |
d46de8a1 | 683 | |
87f0e418 | 684 | /* Load drop-in directory data */ |
23a177ef | 685 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
87f0e418 LP |
686 | return r; |
687 | ||
23a177ef | 688 | return 0; |
87f0e418 LP |
689 | } |
690 | ||
a16e1123 LP |
691 | /* Common implementation for multiple backends */ |
692 | int unit_load_nop(Unit *u) { | |
693 | assert(u); | |
694 | ||
695 | if (u->meta.load_state == UNIT_STUB) | |
696 | u->meta.load_state = UNIT_LOADED; | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
87f0e418 LP |
701 | int unit_load(Unit *u) { |
702 | int r; | |
703 | ||
704 | assert(u); | |
705 | ||
706 | if (u->meta.in_load_queue) { | |
707 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
708 | u->meta.in_load_queue = false; | |
709 | } | |
710 | ||
e537352b LP |
711 | if (u->meta.type == _UNIT_TYPE_INVALID) |
712 | return -EINVAL; | |
713 | ||
87f0e418 LP |
714 | if (u->meta.load_state != UNIT_STUB) |
715 | return 0; | |
716 | ||
e537352b LP |
717 | if (UNIT_VTABLE(u)->load) |
718 | if ((r = UNIT_VTABLE(u)->load(u)) < 0) | |
87f0e418 | 719 | goto fail; |
23a177ef | 720 | |
e537352b | 721 | if (u->meta.load_state == UNIT_STUB) { |
23a177ef LP |
722 | r = -ENOENT; |
723 | goto fail; | |
724 | } | |
725 | ||
23a177ef LP |
726 | assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into); |
727 | ||
728 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 729 | unit_add_to_gc_queue(u); |
87f0e418 | 730 | |
87f0e418 LP |
731 | return 0; |
732 | ||
733 | fail: | |
734 | u->meta.load_state = UNIT_FAILED; | |
c1e1601e | 735 | unit_add_to_dbus_queue(u); |
23a177ef | 736 | |
30de7d85 | 737 | log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r)); |
23a177ef | 738 | |
87f0e418 LP |
739 | return r; |
740 | } | |
741 | ||
742 | /* Errors: | |
d5159713 LP |
743 | * -EBADR: This unit type does not support starting. |
744 | * -EALREADY: Unit is already started. | |
745 | * -EAGAIN: An operation is already in progress. Retry later. | |
746 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
747 | */ |
748 | int unit_start(Unit *u) { | |
749 | UnitActiveState state; | |
750 | ||
751 | assert(u); | |
752 | ||
6124958c LP |
753 | if (u->meta.load_state != UNIT_LOADED) |
754 | return -EINVAL; | |
755 | ||
7898b0cf LP |
756 | /* If this is already (being) started, then this will |
757 | * succeed. Note that this will even succeed if this unit is | |
758 | * not startable by the user. This is relied on to detect when | |
759 | * we need to wait for units and when waiting is finished. */ | |
87f0e418 LP |
760 | state = unit_active_state(u); |
761 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
762 | return -EALREADY; | |
763 | ||
7898b0cf LP |
764 | /* If it is stopped, but we cannot start it, then fail */ |
765 | if (!UNIT_VTABLE(u)->start) | |
766 | return -EBADR; | |
767 | ||
87f0e418 LP |
768 | /* We don't suppress calls to ->start() here when we are |
769 | * already starting, to allow this request to be used as a | |
770 | * "hurry up" call, for example when the unit is in some "auto | |
771 | * restart" state where it waits for a holdoff timer to elapse | |
772 | * before it will start again. */ | |
773 | ||
c1e1601e | 774 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
775 | return UNIT_VTABLE(u)->start(u); |
776 | } | |
777 | ||
778 | bool unit_can_start(Unit *u) { | |
779 | assert(u); | |
780 | ||
781 | return !!UNIT_VTABLE(u)->start; | |
782 | } | |
783 | ||
784 | /* Errors: | |
785 | * -EBADR: This unit type does not support stopping. | |
786 | * -EALREADY: Unit is already stopped. | |
787 | * -EAGAIN: An operation is already in progress. Retry later. | |
788 | */ | |
789 | int unit_stop(Unit *u) { | |
790 | UnitActiveState state; | |
791 | ||
792 | assert(u); | |
793 | ||
87f0e418 | 794 | state = unit_active_state(u); |
6124958c | 795 | if (UNIT_IS_INACTIVE_OR_MAINTENANCE(state)) |
87f0e418 LP |
796 | return -EALREADY; |
797 | ||
7898b0cf LP |
798 | if (!UNIT_VTABLE(u)->stop) |
799 | return -EBADR; | |
800 | ||
c1e1601e | 801 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
802 | return UNIT_VTABLE(u)->stop(u); |
803 | } | |
804 | ||
805 | /* Errors: | |
806 | * -EBADR: This unit type does not support reloading. | |
807 | * -ENOEXEC: Unit is not started. | |
808 | * -EAGAIN: An operation is already in progress. Retry later. | |
809 | */ | |
810 | int unit_reload(Unit *u) { | |
811 | UnitActiveState state; | |
812 | ||
813 | assert(u); | |
814 | ||
6124958c LP |
815 | if (u->meta.load_state != UNIT_LOADED) |
816 | return -EINVAL; | |
817 | ||
87f0e418 LP |
818 | if (!unit_can_reload(u)) |
819 | return -EBADR; | |
820 | ||
821 | state = unit_active_state(u); | |
822 | if (unit_active_state(u) == UNIT_ACTIVE_RELOADING) | |
823 | return -EALREADY; | |
824 | ||
825 | if (unit_active_state(u) != UNIT_ACTIVE) | |
826 | return -ENOEXEC; | |
827 | ||
c1e1601e | 828 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
829 | return UNIT_VTABLE(u)->reload(u); |
830 | } | |
831 | ||
832 | bool unit_can_reload(Unit *u) { | |
833 | assert(u); | |
834 | ||
835 | if (!UNIT_VTABLE(u)->reload) | |
836 | return false; | |
837 | ||
838 | if (!UNIT_VTABLE(u)->can_reload) | |
839 | return true; | |
840 | ||
841 | return UNIT_VTABLE(u)->can_reload(u); | |
842 | } | |
843 | ||
f3bff0eb LP |
844 | static void unit_check_uneeded(Unit *u) { |
845 | Iterator i; | |
846 | Unit *other; | |
847 | ||
848 | assert(u); | |
849 | ||
850 | /* If this service shall be shut down when unneeded then do | |
851 | * so. */ | |
852 | ||
853 | if (!u->meta.stop_when_unneeded) | |
854 | return; | |
855 | ||
856 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
857 | return; | |
858 | ||
859 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i) | |
860 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
861 | return; | |
862 | ||
9e2f7c11 | 863 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
f3bff0eb LP |
864 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
865 | return; | |
866 | ||
867 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i) | |
868 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
869 | return; | |
870 | ||
9e2f7c11 | 871 | log_debug("Service %s is not needed anymore. Stopping.", u->meta.id); |
f3bff0eb LP |
872 | |
873 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
874 | manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL); | |
875 | } | |
876 | ||
87f0e418 LP |
877 | static void retroactively_start_dependencies(Unit *u) { |
878 | Iterator i; | |
879 | Unit *other; | |
880 | ||
881 | assert(u); | |
882 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
883 | ||
884 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
885 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
886 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL); | |
887 | ||
9e2f7c11 | 888 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
87f0e418 LP |
889 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
890 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL); | |
891 | ||
892 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) | |
893 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
894 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL); | |
895 | ||
896 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) | |
897 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
898 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL); | |
899 | ||
900 | SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i) | |
901 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
902 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL); | |
903 | } | |
904 | ||
905 | static void retroactively_stop_dependencies(Unit *u) { | |
906 | Iterator i; | |
907 | Unit *other; | |
908 | ||
909 | assert(u); | |
910 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
911 | ||
f3bff0eb LP |
912 | if (u->meta.recursive_stop) { |
913 | /* Pull down units need us recursively if enabled */ | |
914 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i) | |
915 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
916 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL); | |
917 | } | |
918 | ||
919 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
920 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
87f0e418 | 921 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
f3bff0eb | 922 | unit_check_uneeded(other); |
9e2f7c11 | 923 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb LP |
924 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
925 | unit_check_uneeded(other); | |
926 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) | |
927 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
928 | unit_check_uneeded(other); | |
929 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) | |
930 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
931 | unit_check_uneeded(other); | |
9e2f7c11 | 932 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb LP |
933 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
934 | unit_check_uneeded(other); | |
87f0e418 LP |
935 | } |
936 | ||
937 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) { | |
a096ed36 | 938 | bool unexpected = false; |
63983207 | 939 | dual_timestamp ts; |
a096ed36 | 940 | |
87f0e418 LP |
941 | assert(u); |
942 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
943 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 944 | |
8e471ccd LP |
945 | /* Note that this is called for all low-level state changes, |
946 | * even if they might map to the same high-level | |
947 | * UnitActiveState! That means that ns == os is OK an expected | |
948 | * behaviour here. For example: if a mount point is remounted | |
949 | * this function will be called too and the utmp code below | |
950 | * relies on that! */ | |
87f0e418 | 951 | |
63983207 | 952 | dual_timestamp_get(&ts); |
173e3821 | 953 | |
6124958c | 954 | if (UNIT_IS_INACTIVE_OR_MAINTENANCE(os) && !UNIT_IS_INACTIVE_OR_MAINTENANCE(ns)) |
173e3821 | 955 | u->meta.inactive_exit_timestamp = ts; |
6124958c | 956 | else if (!UNIT_IS_INACTIVE_OR_MAINTENANCE(os) && UNIT_IS_INACTIVE_OR_MAINTENANCE(ns)) |
173e3821 LP |
957 | u->meta.inactive_enter_timestamp = ts; |
958 | ||
87f0e418 | 959 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
173e3821 | 960 | u->meta.active_enter_timestamp = ts; |
87f0e418 | 961 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
173e3821 | 962 | u->meta.active_exit_timestamp = ts; |
87f0e418 | 963 | |
871d7de4 | 964 | timer_unit_notify(u, ns); |
01f78473 | 965 | path_unit_notify(u, ns); |
871d7de4 | 966 | |
87f0e418 LP |
967 | if (u->meta.job) { |
968 | ||
969 | if (u->meta.job->state == JOB_WAITING) | |
970 | ||
971 | /* So we reached a different state for this | |
972 | * job. Let's see if we can run it now if it | |
973 | * failed previously due to EAGAIN. */ | |
c1e1601e | 974 | job_add_to_run_queue(u->meta.job); |
87f0e418 | 975 | |
87f0e418 | 976 | |
b410e6b9 LP |
977 | /* Let's check whether this state change constitutes a |
978 | * finished job, or maybe cotradicts a running job and | |
979 | * hence needs to invalidate jobs. */ | |
87f0e418 | 980 | |
b410e6b9 | 981 | switch (u->meta.job->type) { |
87f0e418 | 982 | |
b410e6b9 LP |
983 | case JOB_START: |
984 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 985 | |
b410e6b9 LP |
986 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
987 | job_finish_and_invalidate(u->meta.job, true); | |
988 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
989 | unexpected = true; | |
990 | job_finish_and_invalidate(u->meta.job, false); | |
991 | } | |
87f0e418 | 992 | |
b410e6b9 | 993 | break; |
87f0e418 | 994 | |
b410e6b9 LP |
995 | case JOB_RELOAD: |
996 | case JOB_RELOAD_OR_START: | |
87f0e418 | 997 | |
b410e6b9 | 998 | if (u->meta.job->state == JOB_RUNNING) { |
a096ed36 | 999 | if (ns == UNIT_ACTIVE) |
87f0e418 | 1000 | job_finish_and_invalidate(u->meta.job, true); |
a096ed36 LP |
1001 | else if (ns != UNIT_ACTIVATING && ns != UNIT_ACTIVE_RELOADING) { |
1002 | unexpected = true; | |
87f0e418 | 1003 | job_finish_and_invalidate(u->meta.job, false); |
a096ed36 | 1004 | } |
b410e6b9 | 1005 | } |
87f0e418 | 1006 | |
b410e6b9 | 1007 | break; |
87f0e418 | 1008 | |
b410e6b9 LP |
1009 | case JOB_STOP: |
1010 | case JOB_RESTART: | |
1011 | case JOB_TRY_RESTART: | |
87f0e418 | 1012 | |
b410e6b9 LP |
1013 | if (ns == UNIT_INACTIVE) |
1014 | job_finish_and_invalidate(u->meta.job, true); | |
6124958c LP |
1015 | else if (ns == UNIT_INACTIVE_MAINTENANCE) |
1016 | job_finish_and_invalidate(u->meta.job, false); | |
b410e6b9 LP |
1017 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
1018 | unexpected = true; | |
1019 | job_finish_and_invalidate(u->meta.job, false); | |
1020 | } | |
87f0e418 | 1021 | |
b410e6b9 | 1022 | break; |
87f0e418 | 1023 | |
b410e6b9 LP |
1024 | default: |
1025 | assert_not_reached("Job type unknown"); | |
87f0e418 LP |
1026 | } |
1027 | } | |
1028 | ||
1029 | /* If this state change happened without being requested by a | |
1030 | * job, then let's retroactively start or stop dependencies */ | |
1031 | ||
a096ed36 LP |
1032 | if (unexpected) { |
1033 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1034 | retroactively_start_dependencies(u); | |
1035 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1036 | retroactively_stop_dependencies(u); | |
1037 | } | |
f3bff0eb | 1038 | |
e537352b LP |
1039 | /* Some names are special */ |
1040 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
f278026d | 1041 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) { |
e537352b LP |
1042 | /* The bus just might have become available, |
1043 | * hence try to connect to it, if we aren't | |
1044 | * yet connected. */ | |
5e8d1c9a | 1045 | bus_init(u->meta.manager); |
f278026d LP |
1046 | } |
1047 | ||
e537352b LP |
1048 | if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) |
1049 | /* The syslog daemon just might have become | |
1050 | * available, hence try to connect to it, if | |
1051 | * we aren't yet connected. */ | |
843d2643 | 1052 | log_open(); |
f278026d | 1053 | |
e537352b LP |
1054 | if (u->meta.type == UNIT_MOUNT) |
1055 | /* Another directory became available, let's | |
1056 | * check if that is enough to write our utmp | |
1057 | * entry. */ | |
1058 | manager_write_utmp_reboot(u->meta.manager); | |
1059 | ||
1060 | if (u->meta.type == UNIT_TARGET) | |
1061 | /* A target got activated, maybe this is a runlevel? */ | |
1062 | manager_write_utmp_runlevel(u->meta.manager, u); | |
1063 | ||
1064 | } else if (!UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
f278026d LP |
1065 | |
1066 | if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) | |
e537352b LP |
1067 | /* The syslog daemon might just have |
1068 | * terminated, hence try to disconnect from | |
1069 | * it. */ | |
2882c7ed | 1070 | log_close_syslog(); |
f278026d LP |
1071 | |
1072 | /* We don't care about D-Bus here, since we'll get an | |
1073 | * asynchronous notification for it anyway. */ | |
1074 | } | |
1075 | ||
f3bff0eb LP |
1076 | /* Maybe we finished startup and are now ready for being |
1077 | * stopped because unneeded? */ | |
1078 | unit_check_uneeded(u); | |
c1e1601e LP |
1079 | |
1080 | unit_add_to_dbus_queue(u); | |
701cc384 | 1081 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1082 | } |
1083 | ||
acbb0225 | 1084 | int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 LP |
1085 | struct epoll_event ev; |
1086 | ||
1087 | assert(u); | |
1088 | assert(fd >= 0); | |
acbb0225 | 1089 | assert(w); |
ea430986 | 1090 | assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
87f0e418 LP |
1091 | |
1092 | zero(ev); | |
acbb0225 | 1093 | ev.data.ptr = w; |
87f0e418 LP |
1094 | ev.events = events; |
1095 | ||
acbb0225 LP |
1096 | if (epoll_ctl(u->meta.manager->epoll_fd, |
1097 | w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, | |
1098 | fd, | |
1099 | &ev) < 0) | |
1100 | return -errno; | |
87f0e418 | 1101 | |
acbb0225 LP |
1102 | w->fd = fd; |
1103 | w->type = WATCH_FD; | |
ea430986 | 1104 | w->data.unit = u; |
87f0e418 | 1105 | |
acbb0225 | 1106 | return 0; |
87f0e418 LP |
1107 | } |
1108 | ||
acbb0225 | 1109 | void unit_unwatch_fd(Unit *u, Watch *w) { |
87f0e418 | 1110 | assert(u); |
acbb0225 | 1111 | assert(w); |
87f0e418 | 1112 | |
acbb0225 LP |
1113 | if (w->type == WATCH_INVALID) |
1114 | return; | |
1115 | ||
ea430986 LP |
1116 | assert(w->type == WATCH_FD); |
1117 | assert(w->data.unit == u); | |
acbb0225 LP |
1118 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
1119 | ||
1120 | w->fd = -1; | |
1121 | w->type = WATCH_INVALID; | |
ea430986 | 1122 | w->data.unit = NULL; |
87f0e418 LP |
1123 | } |
1124 | ||
1125 | int unit_watch_pid(Unit *u, pid_t pid) { | |
1126 | assert(u); | |
1127 | assert(pid >= 1); | |
1128 | ||
05e343b7 LP |
1129 | /* Watch a specific PID. We only support one unit watching |
1130 | * each PID for now. */ | |
1131 | ||
87f0e418 LP |
1132 | return hashmap_put(u->meta.manager->watch_pids, UINT32_TO_PTR(pid), u); |
1133 | } | |
1134 | ||
1135 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1136 | assert(u); | |
1137 | assert(pid >= 1); | |
1138 | ||
05e343b7 | 1139 | hashmap_remove_value(u->meta.manager->watch_pids, UINT32_TO_PTR(pid), u); |
87f0e418 LP |
1140 | } |
1141 | ||
acbb0225 | 1142 | int unit_watch_timer(Unit *u, usec_t delay, Watch *w) { |
87f0e418 | 1143 | struct itimerspec its; |
acbb0225 | 1144 | int flags, fd; |
87f0e418 LP |
1145 | bool ours; |
1146 | ||
1147 | assert(u); | |
acbb0225 | 1148 | assert(w); |
ea430986 | 1149 | assert(w->type == WATCH_INVALID || (w->type == WATCH_TIMER && w->data.unit == u)); |
87f0e418 LP |
1150 | |
1151 | /* This will try to reuse the old timer if there is one */ | |
1152 | ||
acbb0225 | 1153 | if (w->type == WATCH_TIMER) { |
87f0e418 | 1154 | ours = false; |
acbb0225 | 1155 | fd = w->fd; |
87f0e418 LP |
1156 | } else { |
1157 | ours = true; | |
87f0e418 LP |
1158 | if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) |
1159 | return -errno; | |
1160 | } | |
1161 | ||
1162 | zero(its); | |
1163 | ||
1164 | if (delay <= 0) { | |
1165 | /* Set absolute time in the past, but not 0, since we | |
1166 | * don't want to disarm the timer */ | |
1167 | its.it_value.tv_sec = 0; | |
1168 | its.it_value.tv_nsec = 1; | |
1169 | ||
1170 | flags = TFD_TIMER_ABSTIME; | |
1171 | } else { | |
1172 | timespec_store(&its.it_value, delay); | |
1173 | flags = 0; | |
1174 | } | |
1175 | ||
1176 | /* This will also flush the elapse counter */ | |
1177 | if (timerfd_settime(fd, flags, &its, NULL) < 0) | |
1178 | goto fail; | |
1179 | ||
acbb0225 LP |
1180 | if (w->type == WATCH_INVALID) { |
1181 | struct epoll_event ev; | |
87f0e418 | 1182 | |
acbb0225 LP |
1183 | zero(ev); |
1184 | ev.data.ptr = w; | |
f94ea366 | 1185 | ev.events = EPOLLIN; |
acbb0225 LP |
1186 | |
1187 | if (epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) | |
1188 | goto fail; | |
1189 | } | |
1190 | ||
1191 | w->fd = fd; | |
1192 | w->type = WATCH_TIMER; | |
ea430986 | 1193 | w->data.unit = u; |
87f0e418 | 1194 | |
87f0e418 LP |
1195 | return 0; |
1196 | ||
1197 | fail: | |
1198 | if (ours) | |
ea430986 | 1199 | close_nointr_nofail(fd); |
87f0e418 LP |
1200 | |
1201 | return -errno; | |
1202 | } | |
1203 | ||
acbb0225 | 1204 | void unit_unwatch_timer(Unit *u, Watch *w) { |
87f0e418 | 1205 | assert(u); |
acbb0225 | 1206 | assert(w); |
87f0e418 | 1207 | |
acbb0225 | 1208 | if (w->type == WATCH_INVALID) |
87f0e418 LP |
1209 | return; |
1210 | ||
ea430986 | 1211 | assert(w->type == WATCH_TIMER && w->data.unit == u); |
acbb0225 LP |
1212 | |
1213 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); | |
a16e1123 | 1214 | close_nointr_nofail(w->fd); |
acbb0225 LP |
1215 | |
1216 | w->fd = -1; | |
1217 | w->type = WATCH_INVALID; | |
ea430986 | 1218 | w->data.unit = NULL; |
87f0e418 LP |
1219 | } |
1220 | ||
1221 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
1222 | assert(u); | |
1223 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1224 | ||
1225 | switch (j) { | |
1226 | ||
1227 | case JOB_VERIFY_ACTIVE: | |
1228 | case JOB_START: | |
1229 | return true; | |
1230 | ||
1231 | case JOB_STOP: | |
1232 | case JOB_RESTART: | |
1233 | case JOB_TRY_RESTART: | |
1234 | return unit_can_start(u); | |
1235 | ||
1236 | case JOB_RELOAD: | |
1237 | return unit_can_reload(u); | |
1238 | ||
1239 | case JOB_RELOAD_OR_START: | |
1240 | return unit_can_reload(u) && unit_can_start(u); | |
1241 | ||
1242 | default: | |
1243 | assert_not_reached("Invalid job type"); | |
1244 | } | |
1245 | } | |
1246 | ||
701cc384 | 1247 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1248 | |
1249 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1250 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1251 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1252 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1253 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1254 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 | 1255 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1256 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 LP |
1257 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
1258 | [UNIT_CONFLICTS] = UNIT_CONFLICTS, | |
1259 | [UNIT_BEFORE] = UNIT_AFTER, | |
701cc384 LP |
1260 | [UNIT_AFTER] = UNIT_BEFORE, |
1261 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, | |
1262 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES | |
87f0e418 | 1263 | }; |
701cc384 | 1264 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1265 | |
1266 | assert(u); | |
1267 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
1268 | assert(inverse_table[d] != _UNIT_DEPENDENCY_INVALID); | |
1269 | assert(other); | |
1270 | ||
1271 | /* We won't allow dependencies on ourselves. We will not | |
1272 | * consider them an error however. */ | |
1273 | if (u == other) | |
1274 | return 0; | |
1275 | ||
9e2f7c11 LP |
1276 | if (UNIT_VTABLE(u)->no_requires && |
1277 | (d == UNIT_REQUIRES || | |
1278 | d == UNIT_REQUIRES_OVERRIDABLE || | |
1279 | d == UNIT_REQUISITE || | |
1280 | d == UNIT_REQUISITE_OVERRIDABLE)) { | |
1281 | return -EINVAL; | |
1282 | } | |
1283 | ||
701cc384 LP |
1284 | if ((r = set_ensure_allocated(&u->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0 || |
1285 | (r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) | |
87f0e418 LP |
1286 | return r; |
1287 | ||
701cc384 LP |
1288 | if (add_reference) |
1289 | if ((r = set_ensure_allocated(&u->meta.dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 || | |
1290 | (r = set_ensure_allocated(&other->meta.dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0) | |
1291 | return r; | |
87f0e418 | 1292 | |
701cc384 LP |
1293 | if ((q = set_put(u->meta.dependencies[d], other)) < 0) |
1294 | return q; | |
87f0e418 | 1295 | |
701cc384 LP |
1296 | if ((v = set_put(other->meta.dependencies[inverse_table[d]], u)) < 0) { |
1297 | r = v; | |
1298 | goto fail; | |
1299 | } | |
1300 | ||
1301 | if (add_reference) { | |
1302 | if ((w = set_put(u->meta.dependencies[UNIT_REFERENCES], other)) < 0) { | |
1303 | r = w; | |
1304 | goto fail; | |
1305 | } | |
1306 | ||
1307 | if ((r = set_put(other->meta.dependencies[UNIT_REFERENCED_BY], u)) < 0) | |
1308 | goto fail; | |
87f0e418 LP |
1309 | } |
1310 | ||
c1e1601e | 1311 | unit_add_to_dbus_queue(u); |
87f0e418 | 1312 | return 0; |
701cc384 LP |
1313 | |
1314 | fail: | |
1315 | if (q > 0) | |
1316 | set_remove(u->meta.dependencies[d], other); | |
1317 | ||
1318 | if (v > 0) | |
1319 | set_remove(other->meta.dependencies[inverse_table[d]], u); | |
1320 | ||
1321 | if (w > 0) | |
1322 | set_remove(u->meta.dependencies[UNIT_REFERENCES], other); | |
1323 | ||
1324 | return r; | |
87f0e418 | 1325 | } |
0301abf4 | 1326 | |
9e2f7c11 LP |
1327 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1328 | char *s; | |
1329 | ||
1330 | assert(u); | |
1331 | assert(name || path); | |
1332 | ||
1333 | if (!name) | |
1334 | name = file_name_from_path(path); | |
1335 | ||
1336 | if (!unit_name_is_template(name)) { | |
1337 | *p = NULL; | |
1338 | return name; | |
1339 | } | |
1340 | ||
1341 | if (u->meta.instance) | |
1342 | s = unit_name_replace_instance(name, u->meta.instance); | |
1343 | else { | |
1344 | char *i; | |
1345 | ||
1346 | if (!(i = unit_name_to_prefix(u->meta.id))) | |
1347 | return NULL; | |
1348 | ||
1349 | s = unit_name_replace_instance(name, i); | |
1350 | free(i); | |
1351 | } | |
1352 | ||
1353 | if (!s) | |
1354 | return NULL; | |
1355 | ||
1356 | *p = s; | |
1357 | return s; | |
1358 | } | |
1359 | ||
701cc384 | 1360 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
1361 | Unit *other; |
1362 | int r; | |
9e2f7c11 | 1363 | char *s; |
09b6b09f | 1364 | |
9e2f7c11 LP |
1365 | assert(u); |
1366 | assert(name || path); | |
09b6b09f | 1367 | |
9e2f7c11 LP |
1368 | if (!(name = resolve_template(u, name, path, &s))) |
1369 | return -ENOMEM; | |
09b6b09f | 1370 | |
9e2f7c11 LP |
1371 | if ((r = manager_load_unit(u->meta.manager, name, path, &other)) < 0) |
1372 | goto finish; | |
1373 | ||
701cc384 | 1374 | r = unit_add_dependency(u, d, other, add_reference); |
9e2f7c11 LP |
1375 | |
1376 | finish: | |
1377 | free(s); | |
1378 | return r; | |
09b6b09f LP |
1379 | } |
1380 | ||
701cc384 | 1381 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
1382 | Unit *other; |
1383 | int r; | |
9e2f7c11 | 1384 | char *s; |
bd77d0fc | 1385 | |
9e2f7c11 LP |
1386 | assert(u); |
1387 | assert(name || path); | |
bd77d0fc | 1388 | |
9e2f7c11 LP |
1389 | if (!(name = resolve_template(u, name, path, &s))) |
1390 | return -ENOMEM; | |
bd77d0fc | 1391 | |
9e2f7c11 LP |
1392 | if ((r = manager_load_unit(u->meta.manager, name, path, &other)) < 0) |
1393 | goto finish; | |
1394 | ||
701cc384 | 1395 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 LP |
1396 | |
1397 | finish: | |
1398 | free(s); | |
1399 | return r; | |
bd77d0fc LP |
1400 | } |
1401 | ||
0301abf4 LP |
1402 | int set_unit_path(const char *p) { |
1403 | char *cwd, *c; | |
1404 | int r; | |
1405 | ||
1406 | /* This is mostly for debug purposes */ | |
1407 | ||
1408 | if (path_is_absolute(p)) { | |
1409 | if (!(c = strdup(p))) | |
1410 | return -ENOMEM; | |
1411 | } else { | |
1412 | if (!(cwd = get_current_dir_name())) | |
1413 | return -errno; | |
1414 | ||
1415 | r = asprintf(&c, "%s/%s", cwd, p); | |
1416 | free(cwd); | |
1417 | ||
1418 | if (r < 0) | |
1419 | return -ENOMEM; | |
1420 | } | |
1421 | ||
036643a2 | 1422 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) { |
0301abf4 LP |
1423 | r = -errno; |
1424 | free(c); | |
1425 | return r; | |
1426 | } | |
1427 | ||
1428 | return 0; | |
1429 | } | |
88066b3a | 1430 | |
ea430986 LP |
1431 | char *unit_dbus_path(Unit *u) { |
1432 | char *p, *e; | |
1433 | ||
1434 | assert(u); | |
1435 | ||
9e2f7c11 | 1436 | if (!(e = bus_path_escape(u->meta.id))) |
ea430986 LP |
1437 | return NULL; |
1438 | ||
1439 | if (asprintf(&p, "/org/freedesktop/systemd1/unit/%s", e) < 0) { | |
1440 | free(e); | |
1441 | return NULL; | |
1442 | } | |
1443 | ||
1444 | free(e); | |
1445 | return p; | |
1446 | } | |
1447 | ||
8e274523 LP |
1448 | int unit_add_cgroup(Unit *u, CGroupBonding *b) { |
1449 | CGroupBonding *l; | |
1450 | int r; | |
1451 | ||
1452 | assert(u); | |
1453 | assert(b); | |
1454 | assert(b->path); | |
1455 | ||
1456 | /* Ensure this hasn't been added yet */ | |
1457 | assert(!b->unit); | |
1458 | ||
1459 | l = hashmap_get(u->meta.manager->cgroup_bondings, b->path); | |
1460 | LIST_PREPEND(CGroupBonding, by_path, l, b); | |
1461 | ||
1462 | if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) { | |
1463 | LIST_REMOVE(CGroupBonding, by_path, l, b); | |
1464 | return r; | |
1465 | } | |
1466 | ||
1467 | LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b); | |
1468 | b->unit = u; | |
1469 | ||
1470 | return 0; | |
1471 | } | |
1472 | ||
013b87c0 LP |
1473 | static char *default_cgroup_path(Unit *u) { |
1474 | char *p; | |
4f2d528d | 1475 | int r; |
013b87c0 LP |
1476 | |
1477 | assert(u); | |
1478 | ||
4f2d528d LP |
1479 | if (u->meta.instance) { |
1480 | char *t; | |
013b87c0 | 1481 | |
4f2d528d LP |
1482 | if (!(t = unit_name_template(u->meta.id))) |
1483 | return NULL; | |
1484 | ||
1485 | r = asprintf(&p, "%s/%s/%s", u->meta.manager->cgroup_hierarchy, t, u->meta.instance); | |
1486 | free(t); | |
1487 | } else | |
1488 | r = asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, u->meta.id); | |
1489 | ||
1490 | return r < 0 ? NULL : p; | |
013b87c0 LP |
1491 | } |
1492 | ||
8e274523 LP |
1493 | int unit_add_cgroup_from_text(Unit *u, const char *name) { |
1494 | size_t n; | |
013b87c0 LP |
1495 | char *controller = NULL, *path = NULL; |
1496 | CGroupBonding *b = NULL; | |
8e274523 LP |
1497 | int r; |
1498 | ||
1499 | assert(u); | |
1500 | assert(name); | |
1501 | ||
1502 | /* Detect controller name */ | |
013b87c0 | 1503 | n = strcspn(name, ":"); |
8e274523 | 1504 | |
013b87c0 LP |
1505 | if (name[n] == 0 || |
1506 | (name[n] == ':' && name[n+1] == 0)) { | |
8e274523 | 1507 | |
013b87c0 | 1508 | /* Only controller name, no path? */ |
8e274523 | 1509 | |
013b87c0 LP |
1510 | if (!(path = default_cgroup_path(u))) |
1511 | return -ENOMEM; | |
8e274523 | 1512 | |
013b87c0 LP |
1513 | } else { |
1514 | const char *p; | |
8e274523 | 1515 | |
013b87c0 LP |
1516 | /* Controller name, and path. */ |
1517 | p = name+n+1; | |
8e274523 | 1518 | |
013b87c0 LP |
1519 | if (!path_is_absolute(p)) |
1520 | return -EINVAL; | |
1521 | ||
1522 | if (!(path = strdup(p))) | |
1523 | return -ENOMEM; | |
8e274523 LP |
1524 | } |
1525 | ||
013b87c0 LP |
1526 | if (n > 0) |
1527 | controller = strndup(name, n); | |
1528 | else | |
1529 | controller = strdup(u->meta.manager->cgroup_controller); | |
1530 | ||
1531 | if (!controller) { | |
1532 | r = -ENOMEM; | |
1533 | goto fail; | |
8e274523 LP |
1534 | } |
1535 | ||
013b87c0 LP |
1536 | if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) { |
1537 | r = -EEXIST; | |
1538 | goto fail; | |
1539 | } | |
8e274523 | 1540 | |
013b87c0 | 1541 | if (!(b = new0(CGroupBonding, 1))) { |
8e274523 LP |
1542 | r = -ENOMEM; |
1543 | goto fail; | |
1544 | } | |
1545 | ||
013b87c0 LP |
1546 | b->controller = controller; |
1547 | b->path = path; | |
8e274523 LP |
1548 | b->only_us = false; |
1549 | b->clean_up = false; | |
1550 | ||
1551 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1552 | goto fail; | |
1553 | ||
1554 | return 0; | |
1555 | ||
1556 | fail: | |
013b87c0 LP |
1557 | free(path); |
1558 | free(controller); | |
8e274523 LP |
1559 | free(b); |
1560 | ||
1561 | return r; | |
1562 | } | |
1563 | ||
1564 | int unit_add_default_cgroup(Unit *u) { | |
1565 | CGroupBonding *b; | |
1566 | int r = -ENOMEM; | |
1567 | ||
1568 | assert(u); | |
1569 | ||
1570 | /* Adds in the default cgroup data, if it wasn't specified yet */ | |
1571 | ||
1572 | if (unit_get_default_cgroup(u)) | |
1573 | return 0; | |
1574 | ||
1575 | if (!(b = new0(CGroupBonding, 1))) | |
1576 | return -ENOMEM; | |
1577 | ||
1578 | if (!(b->controller = strdup(u->meta.manager->cgroup_controller))) | |
1579 | goto fail; | |
1580 | ||
013b87c0 | 1581 | if (!(b->path = default_cgroup_path(u))) |
8e274523 LP |
1582 | goto fail; |
1583 | ||
1584 | b->clean_up = true; | |
1585 | b->only_us = true; | |
1586 | ||
1587 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1588 | goto fail; | |
1589 | ||
1590 | return 0; | |
1591 | ||
1592 | fail: | |
1593 | free(b->path); | |
1594 | free(b->controller); | |
1595 | free(b); | |
1596 | ||
1597 | return r; | |
1598 | } | |
1599 | ||
1600 | CGroupBonding* unit_get_default_cgroup(Unit *u) { | |
1601 | assert(u); | |
1602 | ||
1603 | return cgroup_bonding_find_list(u->meta.cgroup_bondings, u->meta.manager->cgroup_controller); | |
1604 | } | |
1605 | ||
f6ff8c29 LP |
1606 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
1607 | char *t; | |
1608 | int r; | |
1609 | ||
1610 | assert(u); | |
1611 | assert(type); | |
1612 | assert(_found); | |
1613 | ||
9e2f7c11 | 1614 | if (!(t = unit_name_change_suffix(u->meta.id, type))) |
f6ff8c29 LP |
1615 | return -ENOMEM; |
1616 | ||
1617 | assert(!unit_has_name(u, t)); | |
1618 | ||
9e2f7c11 | 1619 | r = manager_load_unit(u->meta.manager, t, NULL, _found); |
f6ff8c29 LP |
1620 | free(t); |
1621 | ||
9e2f7c11 | 1622 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
1623 | |
1624 | return r; | |
1625 | } | |
1626 | ||
a16e1123 LP |
1627 | int unit_get_related_unit(Unit *u, const char *type, Unit **_found) { |
1628 | Unit *found; | |
1629 | char *t; | |
1630 | ||
1631 | assert(u); | |
1632 | assert(type); | |
1633 | assert(_found); | |
1634 | ||
1635 | if (!(t = unit_name_change_suffix(u->meta.id, type))) | |
1636 | return -ENOMEM; | |
1637 | ||
1638 | assert(!unit_has_name(u, t)); | |
1639 | ||
1640 | found = manager_get_unit(u->meta.manager, t); | |
1641 | free(t); | |
1642 | ||
1643 | if (!found) | |
1644 | return -ENOENT; | |
1645 | ||
1646 | *_found = found; | |
1647 | return 0; | |
1648 | } | |
1649 | ||
9e2f7c11 LP |
1650 | static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) { |
1651 | Unit *u = userdata; | |
1652 | assert(u); | |
1653 | ||
1654 | return unit_name_to_prefix_and_instance(u->meta.id); | |
1655 | } | |
1656 | ||
1657 | static char *specifier_prefix(char specifier, void *data, void *userdata) { | |
1658 | Unit *u = userdata; | |
1659 | assert(u); | |
1660 | ||
1661 | return unit_name_to_prefix(u->meta.id); | |
1662 | } | |
1663 | ||
1664 | static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) { | |
1665 | Unit *u = userdata; | |
1666 | char *p, *r; | |
1667 | ||
1668 | assert(u); | |
1669 | ||
1670 | if (!(p = unit_name_to_prefix(u->meta.id))) | |
1671 | return NULL; | |
1672 | ||
1673 | r = unit_name_unescape(p); | |
1674 | free(p); | |
1675 | ||
1676 | return r; | |
1677 | } | |
1678 | ||
1679 | static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) { | |
1680 | Unit *u = userdata; | |
1681 | assert(u); | |
1682 | ||
1683 | if (u->meta.instance) | |
1684 | return unit_name_unescape(u->meta.instance); | |
1685 | ||
1686 | return strdup(""); | |
1687 | } | |
1688 | ||
1689 | char *unit_name_printf(Unit *u, const char* format) { | |
1690 | ||
1691 | /* | |
1692 | * This will use the passed string as format string and | |
1693 | * replace the following specifiers: | |
1694 | * | |
1695 | * %n: the full id of the unit (foo@bar.waldo) | |
1696 | * %N: the id of the unit without the suffix (foo@bar) | |
1697 | * %p: the prefix (foo) | |
1698 | * %i: the instance (bar) | |
1699 | */ | |
1700 | ||
1701 | const Specifier table[] = { | |
1702 | { 'n', specifier_string, u->meta.id }, | |
1703 | { 'N', specifier_prefix_and_instance, NULL }, | |
1704 | { 'p', specifier_prefix, NULL }, | |
1705 | { 'i', specifier_string, u->meta.instance }, | |
1706 | { 0, NULL, NULL } | |
1707 | }; | |
1708 | ||
1709 | assert(u); | |
1710 | assert(format); | |
1711 | ||
1712 | return specifier_printf(format, table, u); | |
1713 | } | |
1714 | ||
1715 | char *unit_full_printf(Unit *u, const char *format) { | |
1716 | ||
1717 | /* This is similar to unit_name_printf() but also supports | |
1718 | * unescaping */ | |
1719 | ||
1720 | const Specifier table[] = { | |
1721 | { 'n', specifier_string, u->meta.id }, | |
1722 | { 'N', specifier_prefix_and_instance, NULL }, | |
1723 | { 'p', specifier_prefix, NULL }, | |
1724 | { 'P', specifier_prefix_unescaped, NULL }, | |
1725 | { 'i', specifier_string, u->meta.instance }, | |
1726 | { 'I', specifier_instance_unescaped, NULL }, | |
1727 | { 0, NULL, NULL } | |
1728 | }; | |
1729 | ||
1730 | assert(u); | |
1731 | assert(format); | |
1732 | ||
1733 | return specifier_printf(format, table, u); | |
1734 | } | |
1735 | ||
1736 | char **unit_full_printf_strv(Unit *u, char **l) { | |
1737 | size_t n; | |
1738 | char **r, **i, **j; | |
1739 | ||
1740 | /* Applies unit_full_printf to every entry in l */ | |
1741 | ||
1742 | assert(u); | |
1743 | ||
1744 | n = strv_length(l); | |
1745 | if (!(r = new(char*, n+1))) | |
1746 | return NULL; | |
1747 | ||
1748 | for (i = l, j = r; *i; i++, j++) | |
1749 | if (!(*j = unit_full_printf(u, *i))) | |
1750 | goto fail; | |
1751 | ||
1752 | *j = NULL; | |
1753 | return r; | |
1754 | ||
1755 | fail: | |
1756 | j--; | |
1757 | while (j >= r) | |
1758 | free(*j); | |
1759 | ||
1760 | free(r); | |
1761 | ||
1762 | return NULL; | |
1763 | } | |
1764 | ||
05e343b7 LP |
1765 | int unit_watch_bus_name(Unit *u, const char *name) { |
1766 | assert(u); | |
1767 | assert(name); | |
1768 | ||
1769 | /* Watch a specific name on the bus. We only support one unit | |
1770 | * watching each name for now. */ | |
1771 | ||
1772 | return hashmap_put(u->meta.manager->watch_bus, name, u); | |
1773 | } | |
1774 | ||
1775 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
1776 | assert(u); | |
1777 | assert(name); | |
1778 | ||
1779 | hashmap_remove_value(u->meta.manager->watch_bus, name, u); | |
1780 | } | |
1781 | ||
a16e1123 LP |
1782 | bool unit_can_serialize(Unit *u) { |
1783 | assert(u); | |
1784 | ||
1785 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
1786 | } | |
1787 | ||
1788 | int unit_serialize(Unit *u, FILE *f, FDSet *fds) { | |
1789 | int r; | |
1790 | ||
1791 | assert(u); | |
1792 | assert(f); | |
1793 | assert(fds); | |
1794 | ||
1795 | if (!unit_can_serialize(u)) | |
1796 | return 0; | |
1797 | ||
1798 | if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0) | |
1799 | return r; | |
1800 | ||
cca098b0 LP |
1801 | if (u->meta.job) |
1802 | unit_serialize_item(u, f, "job", job_type_to_string(u->meta.job->type)); | |
1803 | ||
a16e1123 LP |
1804 | /* End marker */ |
1805 | fputc('\n', f); | |
1806 | return 0; | |
1807 | } | |
1808 | ||
1809 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
1810 | va_list ap; | |
1811 | ||
1812 | assert(u); | |
1813 | assert(f); | |
1814 | assert(key); | |
1815 | assert(format); | |
1816 | ||
1817 | fputs(key, f); | |
1818 | fputc('=', f); | |
1819 | ||
1820 | va_start(ap, format); | |
1821 | vfprintf(f, format, ap); | |
1822 | va_end(ap); | |
1823 | ||
1824 | fputc('\n', f); | |
1825 | } | |
1826 | ||
1827 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
1828 | assert(u); | |
1829 | assert(f); | |
1830 | assert(key); | |
1831 | assert(value); | |
1832 | ||
1833 | fprintf(f, "%s=%s\n", key, value); | |
1834 | } | |
1835 | ||
1836 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
1837 | int r; | |
1838 | ||
1839 | assert(u); | |
1840 | assert(f); | |
1841 | assert(fds); | |
1842 | ||
1843 | if (!unit_can_serialize(u)) | |
1844 | return 0; | |
1845 | ||
1846 | for (;;) { | |
1847 | char line[1024], *l, *v; | |
1848 | size_t k; | |
1849 | ||
1850 | if (!fgets(line, sizeof(line), f)) { | |
1851 | if (feof(f)) | |
1852 | return 0; | |
1853 | return -errno; | |
1854 | } | |
1855 | ||
1856 | l = strstrip(line); | |
1857 | ||
1858 | /* End marker */ | |
1859 | if (l[0] == 0) | |
1860 | return 0; | |
1861 | ||
1862 | k = strcspn(l, "="); | |
1863 | ||
1864 | if (l[k] == '=') { | |
1865 | l[k] = 0; | |
1866 | v = l+k+1; | |
1867 | } else | |
1868 | v = l+k; | |
1869 | ||
cca098b0 LP |
1870 | if (streq(l, "job")) { |
1871 | JobType type; | |
1872 | ||
1873 | if ((type = job_type_from_string(v)) < 0) | |
1874 | log_debug("Failed to parse job type value %s", v); | |
1875 | else | |
1876 | u->meta.deserialized_job = type; | |
1877 | ||
1878 | continue; | |
1879 | } | |
1880 | ||
a16e1123 LP |
1881 | if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0) |
1882 | return r; | |
1883 | } | |
1884 | } | |
1885 | ||
6e2ef85b LP |
1886 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
1887 | Unit *device; | |
1888 | char *e; | |
1889 | int r; | |
1890 | ||
1891 | assert(u); | |
1892 | ||
1893 | if (!what) | |
1894 | return 0; | |
1895 | ||
1896 | /* Adds in links to the device node that this unit is based on */ | |
1897 | ||
8407a5d0 | 1898 | if (!is_device_path(what)) |
6e2ef85b LP |
1899 | return 0; |
1900 | ||
1901 | if (!(e = unit_name_build_escape(what+1, NULL, ".device"))) | |
1902 | return -ENOMEM; | |
1903 | ||
1904 | r = manager_load_unit(u->meta.manager, e, NULL, &device); | |
1905 | free(e); | |
1906 | ||
1907 | if (r < 0) | |
1908 | return r; | |
1909 | ||
1910 | if ((r = unit_add_dependency(u, UNIT_AFTER, device, true)) < 0) | |
1911 | return r; | |
1912 | ||
1913 | if ((r = unit_add_dependency(u, UNIT_REQUIRES, device, true)) < 0) | |
1914 | return r; | |
1915 | ||
1916 | if (wants) | |
1917 | if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0) | |
1918 | return r; | |
1919 | ||
1920 | return 0; | |
1921 | } | |
a16e1123 | 1922 | |
cca098b0 LP |
1923 | int unit_coldplug(Unit *u) { |
1924 | int r; | |
1925 | ||
1926 | assert(u); | |
1927 | ||
1928 | if (UNIT_VTABLE(u)->coldplug) | |
1929 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
1930 | return r; | |
1931 | ||
1932 | if (u->meta.deserialized_job >= 0) { | |
1933 | if ((r = manager_add_job(u->meta.manager, u->meta.deserialized_job, u, JOB_FAIL, false, NULL)) < 0) | |
1934 | return r; | |
1935 | ||
1936 | u->meta.deserialized_job = _JOB_TYPE_INVALID; | |
1937 | } | |
1938 | ||
1939 | return 0; | |
1940 | } | |
1941 | ||
94f04347 LP |
1942 | static const char* const unit_type_table[_UNIT_TYPE_MAX] = { |
1943 | [UNIT_SERVICE] = "service", | |
1944 | [UNIT_TIMER] = "timer", | |
1945 | [UNIT_SOCKET] = "socket", | |
1946 | [UNIT_TARGET] = "target", | |
1947 | [UNIT_DEVICE] = "device", | |
1948 | [UNIT_MOUNT] = "mount", | |
1949 | [UNIT_AUTOMOUNT] = "automount", | |
07b0b134 ML |
1950 | [UNIT_SNAPSHOT] = "snapshot", |
1951 | [UNIT_SWAP] = "swap" | |
94f04347 LP |
1952 | }; |
1953 | ||
1954 | DEFINE_STRING_TABLE_LOOKUP(unit_type, UnitType); | |
1955 | ||
1956 | static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = { | |
1957 | [UNIT_STUB] = "stub", | |
1958 | [UNIT_LOADED] = "loaded", | |
23a177ef LP |
1959 | [UNIT_FAILED] = "failed", |
1960 | [UNIT_MERGED] = "merged" | |
94f04347 LP |
1961 | }; |
1962 | ||
1963 | DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState); | |
1964 | ||
1965 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { | |
1966 | [UNIT_ACTIVE] = "active", | |
6124958c | 1967 | [UNIT_ACTIVE_RELOADING] = "active-reloading", |
94f04347 | 1968 | [UNIT_INACTIVE] = "inactive", |
6124958c | 1969 | [UNIT_INACTIVE_MAINTENANCE] = "inactive-maintenance", |
94f04347 LP |
1970 | [UNIT_ACTIVATING] = "activating", |
1971 | [UNIT_DEACTIVATING] = "deactivating" | |
1972 | }; | |
1973 | ||
1974 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
1975 | ||
1976 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
1977 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 1978 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 LP |
1979 | [UNIT_WANTS] = "Wants", |
1980 | [UNIT_REQUISITE] = "Requisite", | |
9e2f7c11 | 1981 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
94f04347 | 1982 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 1983 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
94f04347 LP |
1984 | [UNIT_WANTED_BY] = "WantedBy", |
1985 | [UNIT_CONFLICTS] = "Conflicts", | |
1986 | [UNIT_BEFORE] = "Before", | |
1987 | [UNIT_AFTER] = "After", | |
701cc384 LP |
1988 | [UNIT_REFERENCES] = "References", |
1989 | [UNIT_REFERENCED_BY] = "ReferencedBy" | |
94f04347 LP |
1990 | }; |
1991 | ||
1992 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); | |
50159e6a LP |
1993 | |
1994 | static const char* const kill_mode_table[_KILL_MODE_MAX] = { | |
80876c20 | 1995 | [KILL_CONTROL_GROUP] = "control-group", |
50159e6a | 1996 | [KILL_PROCESS_GROUP] = "process-group", |
80876c20 LP |
1997 | [KILL_PROCESS] = "process", |
1998 | [KILL_NONE] = "none" | |
50159e6a LP |
1999 | }; |
2000 | ||
2001 | DEFINE_STRING_TABLE_LOOKUP(kill_mode, KillMode); |