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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" |
c6c18be3 | 42 | #include "cgroup-util.h" |
87f0e418 LP |
43 | |
44 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
45 | [UNIT_SERVICE] = &service_vtable, | |
46 | [UNIT_TIMER] = &timer_vtable, | |
47 | [UNIT_SOCKET] = &socket_vtable, | |
48 | [UNIT_TARGET] = &target_vtable, | |
49 | [UNIT_DEVICE] = &device_vtable, | |
50 | [UNIT_MOUNT] = &mount_vtable, | |
51 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
07b0b134 | 52 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
01f78473 LP |
53 | [UNIT_SWAP] = &swap_vtable, |
54 | [UNIT_PATH] = &path_vtable | |
87f0e418 LP |
55 | }; |
56 | ||
87f0e418 LP |
57 | Unit *unit_new(Manager *m) { |
58 | Unit *u; | |
59 | ||
60 | assert(m); | |
61 | ||
62 | if (!(u = new0(Unit, 1))) | |
63 | return NULL; | |
64 | ||
65 | if (!(u->meta.names = set_new(string_hash_func, string_compare_func))) { | |
66 | free(u); | |
67 | return NULL; | |
68 | } | |
69 | ||
70 | u->meta.manager = m; | |
71 | u->meta.type = _UNIT_TYPE_INVALID; | |
cca098b0 | 72 | u->meta.deserialized_job = _JOB_TYPE_INVALID; |
a40eb732 | 73 | u->meta.default_dependencies = true; |
87f0e418 LP |
74 | |
75 | return u; | |
76 | } | |
77 | ||
f278026d LP |
78 | bool unit_has_name(Unit *u, const char *name) { |
79 | assert(u); | |
80 | assert(name); | |
81 | ||
82 | return !!set_get(u->meta.names, (char*) name); | |
83 | } | |
84 | ||
87f0e418 LP |
85 | int unit_add_name(Unit *u, const char *text) { |
86 | UnitType t; | |
9e2f7c11 | 87 | char *s = NULL, *i = NULL; |
87f0e418 LP |
88 | int r; |
89 | ||
90 | assert(u); | |
91 | assert(text); | |
92 | ||
9e2f7c11 LP |
93 | if (unit_name_is_template(text)) { |
94 | if (!u->meta.instance) | |
95 | return -EINVAL; | |
87f0e418 | 96 | |
9e2f7c11 LP |
97 | s = unit_name_replace_instance(text, u->meta.instance); |
98 | } else | |
99 | s = strdup(text); | |
87f0e418 | 100 | |
9e2f7c11 LP |
101 | if (!s) |
102 | return -ENOMEM; | |
87f0e418 | 103 | |
9e2f7c11 LP |
104 | if (!unit_name_is_valid(s)) { |
105 | r = -EINVAL; | |
106 | goto fail; | |
107 | } | |
e537352b | 108 | |
9e2f7c11 | 109 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 110 | |
9e2f7c11 LP |
111 | if (u->meta.type != _UNIT_TYPE_INVALID && t != u->meta.type) { |
112 | r = -EINVAL; | |
113 | goto fail; | |
114 | } | |
87f0e418 | 115 | |
9e2f7c11 LP |
116 | if ((r = unit_name_to_instance(s, &i)) < 0) |
117 | goto fail; | |
87f0e418 | 118 | |
9e2f7c11 LP |
119 | if (i && unit_vtable[t]->no_instances) |
120 | goto fail; | |
121 | ||
122 | if (u->meta.type != _UNIT_TYPE_INVALID && !streq_ptr(u->meta.instance, i)) { | |
123 | r = -EINVAL; | |
124 | goto fail; | |
125 | } | |
126 | ||
127 | if (unit_vtable[t]->no_alias && | |
128 | !set_isempty(u->meta.names) && | |
129 | !set_get(u->meta.names, s)) { | |
130 | r = -EEXIST; | |
131 | goto fail; | |
132 | } | |
133 | ||
4f0f902f LP |
134 | if (hashmap_size(u->meta.manager->units) >= MANAGER_MAX_NAMES) { |
135 | r = -E2BIG; | |
136 | goto fail; | |
137 | } | |
138 | ||
9e2f7c11 LP |
139 | if ((r = set_put(u->meta.names, s)) < 0) { |
140 | if (r == -EEXIST) | |
141 | r = 0; | |
142 | goto fail; | |
87f0e418 LP |
143 | } |
144 | ||
145 | if ((r = hashmap_put(u->meta.manager->units, s, u)) < 0) { | |
146 | set_remove(u->meta.names, s); | |
9e2f7c11 | 147 | goto fail; |
87f0e418 LP |
148 | } |
149 | ||
e537352b | 150 | if (u->meta.type == _UNIT_TYPE_INVALID) { |
ef734fd6 | 151 | |
e537352b | 152 | u->meta.type = t; |
9e2f7c11 LP |
153 | u->meta.id = s; |
154 | u->meta.instance = i; | |
155 | ||
156 | LIST_PREPEND(Meta, units_per_type, u->meta.manager->units_per_type[t], &u->meta); | |
e537352b LP |
157 | |
158 | if (UNIT_VTABLE(u)->init) | |
159 | UNIT_VTABLE(u)->init(u); | |
9e2f7c11 LP |
160 | } else |
161 | free(i); | |
87f0e418 | 162 | |
c1e1601e | 163 | unit_add_to_dbus_queue(u); |
87f0e418 | 164 | return 0; |
9e2f7c11 LP |
165 | |
166 | fail: | |
167 | free(s); | |
168 | free(i); | |
169 | ||
170 | return r; | |
87f0e418 LP |
171 | } |
172 | ||
0ae97ec1 | 173 | int unit_choose_id(Unit *u, const char *name) { |
9e2f7c11 | 174 | char *s, *t = NULL; |
0ae97ec1 LP |
175 | |
176 | assert(u); | |
177 | assert(name); | |
178 | ||
9e2f7c11 LP |
179 | if (unit_name_is_template(name)) { |
180 | ||
181 | if (!u->meta.instance) | |
182 | return -EINVAL; | |
183 | ||
184 | if (!(t = unit_name_replace_instance(name, u->meta.instance))) | |
185 | return -ENOMEM; | |
186 | ||
187 | name = t; | |
188 | } | |
189 | ||
0ae97ec1 | 190 | /* Selects one of the names of this unit as the id */ |
9e2f7c11 LP |
191 | s = set_get(u->meta.names, (char*) name); |
192 | free(t); | |
0ae97ec1 | 193 | |
9e2f7c11 | 194 | if (!s) |
0ae97ec1 LP |
195 | return -ENOENT; |
196 | ||
197 | u->meta.id = s; | |
c1e1601e | 198 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 199 | |
0ae97ec1 LP |
200 | return 0; |
201 | } | |
202 | ||
f50e0a01 LP |
203 | int unit_set_description(Unit *u, const char *description) { |
204 | char *s; | |
205 | ||
206 | assert(u); | |
207 | ||
208 | if (!(s = strdup(description))) | |
209 | return -ENOMEM; | |
210 | ||
211 | free(u->meta.description); | |
212 | u->meta.description = s; | |
c1e1601e LP |
213 | |
214 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
215 | return 0; |
216 | } | |
217 | ||
701cc384 LP |
218 | bool unit_check_gc(Unit *u) { |
219 | assert(u); | |
220 | ||
b86d44e5 LP |
221 | if (u->meta.load_state == UNIT_STUB) |
222 | return true; | |
223 | ||
701cc384 LP |
224 | if (UNIT_VTABLE(u)->no_gc) |
225 | return true; | |
226 | ||
227 | if (u->meta.job) | |
228 | return true; | |
229 | ||
230 | if (unit_active_state(u) != UNIT_INACTIVE) | |
231 | return true; | |
232 | ||
233 | if (UNIT_VTABLE(u)->check_gc) | |
234 | if (UNIT_VTABLE(u)->check_gc(u)) | |
235 | return true; | |
236 | ||
237 | return false; | |
238 | } | |
239 | ||
87f0e418 LP |
240 | void unit_add_to_load_queue(Unit *u) { |
241 | assert(u); | |
819e213f | 242 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
87f0e418 LP |
243 | |
244 | if (u->meta.load_state != UNIT_STUB || u->meta.in_load_queue) | |
245 | return; | |
246 | ||
247 | LIST_PREPEND(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
248 | u->meta.in_load_queue = true; | |
249 | } | |
250 | ||
23a177ef LP |
251 | void unit_add_to_cleanup_queue(Unit *u) { |
252 | assert(u); | |
253 | ||
254 | if (u->meta.in_cleanup_queue) | |
255 | return; | |
256 | ||
257 | LIST_PREPEND(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta); | |
258 | u->meta.in_cleanup_queue = true; | |
259 | } | |
260 | ||
701cc384 LP |
261 | void unit_add_to_gc_queue(Unit *u) { |
262 | assert(u); | |
263 | ||
264 | if (u->meta.in_gc_queue || u->meta.in_cleanup_queue) | |
265 | return; | |
266 | ||
267 | if (unit_check_gc(u)) | |
268 | return; | |
269 | ||
270 | LIST_PREPEND(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta); | |
271 | u->meta.in_gc_queue = true; | |
272 | ||
273 | u->meta.manager->n_in_gc_queue ++; | |
274 | ||
275 | if (u->meta.manager->gc_queue_timestamp <= 0) | |
276 | u->meta.manager->gc_queue_timestamp = now(CLOCK_MONOTONIC); | |
277 | } | |
278 | ||
c1e1601e LP |
279 | void unit_add_to_dbus_queue(Unit *u) { |
280 | assert(u); | |
819e213f | 281 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
c1e1601e | 282 | |
94b6dfa2 | 283 | if (u->meta.load_state == UNIT_STUB || u->meta.in_dbus_queue) |
c1e1601e LP |
284 | return; |
285 | ||
a567261a LP |
286 | /* Shortcut things if nobody cares */ |
287 | if (!bus_has_subscriber(u->meta.manager)) { | |
94b6dfa2 LP |
288 | u->meta.sent_dbus_new_signal = true; |
289 | return; | |
290 | } | |
291 | ||
c1e1601e LP |
292 | LIST_PREPEND(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); |
293 | u->meta.in_dbus_queue = true; | |
294 | } | |
295 | ||
87f0e418 LP |
296 | static void bidi_set_free(Unit *u, Set *s) { |
297 | Iterator i; | |
298 | Unit *other; | |
299 | ||
300 | assert(u); | |
301 | ||
302 | /* Frees the set and makes sure we are dropped from the | |
303 | * inverse pointers */ | |
304 | ||
305 | SET_FOREACH(other, s, i) { | |
306 | UnitDependency d; | |
307 | ||
308 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
309 | set_remove(other->meta.dependencies[d], u); | |
701cc384 LP |
310 | |
311 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
312 | } |
313 | ||
314 | set_free(s); | |
315 | } | |
316 | ||
317 | void unit_free(Unit *u) { | |
318 | UnitDependency d; | |
319 | Iterator i; | |
320 | char *t; | |
321 | ||
322 | assert(u); | |
323 | ||
c1e1601e LP |
324 | bus_unit_send_removed_signal(u); |
325 | ||
a013b84b LP |
326 | if (u->meta.load_state != UNIT_STUB) |
327 | if (UNIT_VTABLE(u)->done) | |
328 | UNIT_VTABLE(u)->done(u); | |
329 | ||
87f0e418 LP |
330 | SET_FOREACH(t, u->meta.names, i) |
331 | hashmap_remove_value(u->meta.manager->units, t, u); | |
332 | ||
964e0949 LP |
333 | if (u->meta.job) |
334 | job_free(u->meta.job); | |
335 | ||
336 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
337 | bidi_set_free(u, u->meta.dependencies[d]); | |
338 | ||
ef734fd6 LP |
339 | if (u->meta.type != _UNIT_TYPE_INVALID) |
340 | LIST_REMOVE(Meta, units_per_type, u->meta.manager->units_per_type[u->meta.type], &u->meta); | |
341 | ||
87f0e418 LP |
342 | if (u->meta.in_load_queue) |
343 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
344 | ||
c1e1601e LP |
345 | if (u->meta.in_dbus_queue) |
346 | LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); | |
347 | ||
23a177ef LP |
348 | if (u->meta.in_cleanup_queue) |
349 | LIST_REMOVE(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta); | |
350 | ||
701cc384 LP |
351 | if (u->meta.in_gc_queue) { |
352 | LIST_REMOVE(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta); | |
353 | u->meta.manager->n_in_gc_queue--; | |
354 | } | |
355 | ||
e537352b | 356 | cgroup_bonding_free_list(u->meta.cgroup_bondings); |
87f0e418 | 357 | |
87f0e418 | 358 | free(u->meta.description); |
6be1e7d5 | 359 | free(u->meta.fragment_path); |
87f0e418 | 360 | |
53ec43c6 | 361 | set_free_free(u->meta.names); |
87f0e418 | 362 | |
9e2f7c11 LP |
363 | free(u->meta.instance); |
364 | ||
87f0e418 LP |
365 | free(u); |
366 | } | |
367 | ||
368 | UnitActiveState unit_active_state(Unit *u) { | |
369 | assert(u); | |
370 | ||
6124958c LP |
371 | if (u->meta.load_state == UNIT_MERGED) |
372 | return unit_active_state(unit_follow_merge(u)); | |
373 | ||
374 | /* After a reload it might happen that a unit is not correctly | |
375 | * loaded but still has a process around. That's why we won't | |
376 | * shortcut failed loading to UNIT_INACTIVE_MAINTENANCE. */ | |
87f0e418 LP |
377 | |
378 | return UNIT_VTABLE(u)->active_state(u); | |
379 | } | |
380 | ||
10a94420 LP |
381 | const char* unit_sub_state_to_string(Unit *u) { |
382 | assert(u); | |
383 | ||
384 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
385 | } | |
386 | ||
23a177ef LP |
387 | static void complete_move(Set **s, Set **other) { |
388 | assert(s); | |
389 | assert(other); | |
87f0e418 | 390 | |
23a177ef LP |
391 | if (!*other) |
392 | return; | |
87f0e418 LP |
393 | |
394 | if (*s) | |
23a177ef LP |
395 | set_move(*s, *other); |
396 | else { | |
397 | *s = *other; | |
398 | *other = NULL; | |
399 | } | |
400 | } | |
87f0e418 | 401 | |
23a177ef LP |
402 | static void merge_names(Unit *u, Unit *other) { |
403 | char *t; | |
404 | Iterator i; | |
87f0e418 | 405 | |
23a177ef LP |
406 | assert(u); |
407 | assert(other); | |
408 | ||
409 | complete_move(&u->meta.names, &other->meta.names); | |
410 | ||
53ec43c6 | 411 | set_free_free(other->meta.names); |
23a177ef LP |
412 | other->meta.names = NULL; |
413 | other->meta.id = NULL; | |
414 | ||
415 | SET_FOREACH(t, u->meta.names, i) | |
416 | assert_se(hashmap_replace(u->meta.manager->units, t, u) == 0); | |
87f0e418 LP |
417 | } |
418 | ||
23a177ef LP |
419 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
420 | Iterator i; | |
421 | Unit *back; | |
87f0e418 | 422 | int r; |
23a177ef LP |
423 | |
424 | assert(u); | |
425 | assert(other); | |
426 | assert(d < _UNIT_DEPENDENCY_MAX); | |
427 | ||
428 | SET_FOREACH(back, other->meta.dependencies[d], i) { | |
429 | UnitDependency k; | |
430 | ||
431 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) | |
432 | if ((r = set_remove_and_put(back->meta.dependencies[k], other, u)) < 0) { | |
433 | ||
434 | if (r == -EEXIST) | |
435 | set_remove(back->meta.dependencies[k], other); | |
436 | else | |
437 | assert(r == -ENOENT); | |
438 | } | |
439 | } | |
440 | ||
441 | complete_move(&u->meta.dependencies[d], &other->meta.dependencies[d]); | |
442 | ||
443 | set_free(other->meta.dependencies[d]); | |
444 | other->meta.dependencies[d] = NULL; | |
445 | } | |
446 | ||
447 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
448 | UnitDependency d; |
449 | ||
450 | assert(u); | |
451 | assert(other); | |
452 | assert(u->meta.manager == other->meta.manager); | |
9e2f7c11 | 453 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
87f0e418 | 454 | |
cc916967 LP |
455 | other = unit_follow_merge(other); |
456 | ||
23a177ef LP |
457 | if (other == u) |
458 | return 0; | |
459 | ||
9e2f7c11 LP |
460 | if (u->meta.type != other->meta.type) |
461 | return -EINVAL; | |
462 | ||
463 | if (!streq_ptr(u->meta.instance, other->meta.instance)) | |
87f0e418 LP |
464 | return -EINVAL; |
465 | ||
cc916967 LP |
466 | if (other->meta.load_state != UNIT_STUB && |
467 | other->meta.load_state != UNIT_FAILED) | |
23a177ef | 468 | return -EEXIST; |
87f0e418 | 469 | |
819e213f LP |
470 | if (other->meta.job) |
471 | return -EEXIST; | |
472 | ||
6124958c | 473 | if (!UNIT_IS_INACTIVE_OR_MAINTENANCE(unit_active_state(other))) |
819e213f LP |
474 | return -EEXIST; |
475 | ||
87f0e418 | 476 | /* Merge names */ |
23a177ef | 477 | merge_names(u, other); |
87f0e418 LP |
478 | |
479 | /* Merge dependencies */ | |
480 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 481 | merge_dependencies(u, other, d); |
87f0e418 | 482 | |
23a177ef LP |
483 | other->meta.load_state = UNIT_MERGED; |
484 | other->meta.merged_into = u; | |
485 | ||
3616a49c LP |
486 | /* If there is still some data attached to the other node, we |
487 | * don't need it anymore, and can free it. */ | |
488 | if (other->meta.load_state != UNIT_STUB) | |
489 | if (UNIT_VTABLE(other)->done) | |
490 | UNIT_VTABLE(other)->done(other); | |
491 | ||
492 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
493 | unit_add_to_cleanup_queue(other); |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
498 | int unit_merge_by_name(Unit *u, const char *name) { | |
499 | Unit *other; | |
9e2f7c11 LP |
500 | int r; |
501 | char *s = NULL; | |
23a177ef LP |
502 | |
503 | assert(u); | |
504 | assert(name); | |
505 | ||
9e2f7c11 LP |
506 | if (unit_name_is_template(name)) { |
507 | if (!u->meta.instance) | |
508 | return -EINVAL; | |
509 | ||
510 | if (!(s = unit_name_replace_instance(name, u->meta.instance))) | |
511 | return -ENOMEM; | |
512 | ||
513 | name = s; | |
514 | } | |
515 | ||
23a177ef | 516 | if (!(other = manager_get_unit(u->meta.manager, name))) |
9e2f7c11 LP |
517 | r = unit_add_name(u, name); |
518 | else | |
519 | r = unit_merge(u, other); | |
23a177ef | 520 | |
9e2f7c11 LP |
521 | free(s); |
522 | return r; | |
23a177ef LP |
523 | } |
524 | ||
525 | Unit* unit_follow_merge(Unit *u) { | |
526 | assert(u); | |
527 | ||
528 | while (u->meta.load_state == UNIT_MERGED) | |
529 | assert_se(u = u->meta.merged_into); | |
530 | ||
531 | return u; | |
532 | } | |
533 | ||
534 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
535 | int r; | |
536 | ||
537 | assert(u); | |
538 | assert(c); | |
539 | ||
ecc6e2b8 LP |
540 | if (c->std_output != EXEC_OUTPUT_KMSG && |
541 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
542 | c->std_error != EXEC_OUTPUT_KMSG && | |
543 | c->std_error != EXEC_OUTPUT_SYSLOG) | |
23a177ef LP |
544 | return 0; |
545 | ||
546 | /* If syslog or kernel logging is requested, make sure our own | |
547 | * logging daemon is run first. */ | |
548 | ||
701cc384 | 549 | if ((r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0) |
23a177ef LP |
550 | return r; |
551 | ||
a3d4e06d | 552 | if (u->meta.manager->running_as == MANAGER_SYSTEM) |
701cc384 | 553 | if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0) |
23a177ef LP |
554 | return r; |
555 | ||
87f0e418 LP |
556 | return 0; |
557 | } | |
558 | ||
87f0e418 LP |
559 | const char *unit_description(Unit *u) { |
560 | assert(u); | |
561 | ||
562 | if (u->meta.description) | |
563 | return u->meta.description; | |
564 | ||
9e2f7c11 | 565 | return u->meta.id; |
87f0e418 LP |
566 | } |
567 | ||
568 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
87f0e418 LP |
569 | char *t; |
570 | UnitDependency d; | |
571 | Iterator i; | |
47be870b LP |
572 | char *p2; |
573 | const char *prefix2; | |
8e274523 | 574 | CGroupBonding *b; |
173e3821 LP |
575 | char |
576 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
577 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
578 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
579 | timestamp4[FORMAT_TIMESTAMP_MAX]; | |
87f0e418 LP |
580 | |
581 | assert(u); | |
9e2f7c11 | 582 | assert(u->meta.type >= 0); |
87f0e418 LP |
583 | |
584 | if (!prefix) | |
585 | prefix = ""; | |
47be870b LP |
586 | p2 = strappend(prefix, "\t"); |
587 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
588 | |
589 | fprintf(f, | |
40d50879 | 590 | "%s-> Unit %s:\n" |
87f0e418 | 591 | "%s\tDescription: %s\n" |
9e2f7c11 | 592 | "%s\tInstance: %s\n" |
87f0e418 | 593 | "%s\tUnit Load State: %s\n" |
2fad8195 | 594 | "%s\tUnit Active State: %s\n" |
173e3821 | 595 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 596 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 597 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 598 | "%s\tInactive Enter Timestamp: %s\n" |
a40eb732 | 599 | "%s\tGC Check Good: %s\n", |
9e2f7c11 | 600 | prefix, u->meta.id, |
87f0e418 | 601 | prefix, unit_description(u), |
9e2f7c11 | 602 | prefix, strna(u->meta.instance), |
94f04347 | 603 | prefix, unit_load_state_to_string(u->meta.load_state), |
2fad8195 | 604 | prefix, unit_active_state_to_string(unit_active_state(u)), |
871d7de4 LP |
605 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.inactive_exit_timestamp.realtime)), |
606 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_enter_timestamp.realtime)), | |
607 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->meta.active_exit_timestamp.realtime)), | |
608 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->meta.inactive_enter_timestamp.realtime)), | |
a40eb732 | 609 | prefix, yes_no(unit_check_gc(u))); |
0301abf4 | 610 | |
87f0e418 LP |
611 | SET_FOREACH(t, u->meta.names, i) |
612 | fprintf(f, "%s\tName: %s\n", prefix, t); | |
613 | ||
23a177ef LP |
614 | if (u->meta.fragment_path) |
615 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path); | |
616 | ||
87f0e418 LP |
617 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
618 | Unit *other; | |
619 | ||
87f0e418 | 620 | SET_FOREACH(other, u->meta.dependencies[d], i) |
9e2f7c11 | 621 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->meta.id); |
87f0e418 LP |
622 | } |
623 | ||
23a177ef | 624 | if (u->meta.load_state == UNIT_LOADED) { |
b0650475 LP |
625 | fprintf(f, |
626 | "%s\tRecursive Stop: %s\n" | |
a40eb732 LP |
627 | "%s\tStopWhenUnneeded: %s\n" |
628 | "%s\tOnlyByDependency: %s\n" | |
3b6fdb5b LP |
629 | "%s\tDefaultDependencies: %s\n" |
630 | "%s\tIgnoreDependencyFailure: %s\n", | |
b0650475 | 631 | prefix, yes_no(u->meta.recursive_stop), |
a40eb732 LP |
632 | prefix, yes_no(u->meta.stop_when_unneeded), |
633 | prefix, yes_no(u->meta.only_by_dependency), | |
3b6fdb5b LP |
634 | prefix, yes_no(u->meta.default_dependencies), |
635 | prefix, yes_no(u->meta.ignore_dependency_failure)); | |
b0650475 | 636 | |
23a177ef LP |
637 | LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings) |
638 | fprintf(f, "%s\tControlGroup: %s:%s\n", | |
639 | prefix, b->controller, b->path); | |
8e274523 | 640 | |
23a177ef LP |
641 | if (UNIT_VTABLE(u)->dump) |
642 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 LP |
643 | |
644 | } else if (u->meta.load_state == UNIT_MERGED) | |
645 | fprintf(f, | |
646 | "%s\tMerged into: %s\n", | |
9e2f7c11 | 647 | prefix, u->meta.merged_into->meta.id); |
87f0e418 LP |
648 | |
649 | if (u->meta.job) | |
650 | job_dump(u->meta.job, f, prefix2); | |
651 | ||
47be870b | 652 | free(p2); |
87f0e418 LP |
653 | } |
654 | ||
655 | /* Common implementation for multiple backends */ | |
e537352b | 656 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
657 | int r; |
658 | ||
659 | assert(u); | |
23a177ef LP |
660 | |
661 | /* Load a .service file */ | |
e537352b | 662 | if ((r = unit_load_fragment(u)) < 0) |
23a177ef LP |
663 | return r; |
664 | ||
e537352b | 665 | if (u->meta.load_state == UNIT_STUB) |
23a177ef LP |
666 | return -ENOENT; |
667 | ||
668 | /* Load drop-in directory data */ | |
669 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
670 | return r; | |
671 | ||
672 | return 0; | |
673 | } | |
674 | ||
675 | /* Common implementation for multiple backends */ | |
e537352b | 676 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 677 | int r; |
87f0e418 LP |
678 | |
679 | assert(u); | |
680 | ||
23a177ef LP |
681 | /* Same as unit_load_fragment_and_dropin(), but whether |
682 | * something can be loaded or not doesn't matter. */ | |
683 | ||
684 | /* Load a .service file */ | |
e537352b | 685 | if ((r = unit_load_fragment(u)) < 0) |
87f0e418 LP |
686 | return r; |
687 | ||
e537352b LP |
688 | if (u->meta.load_state == UNIT_STUB) |
689 | u->meta.load_state = UNIT_LOADED; | |
d46de8a1 | 690 | |
87f0e418 | 691 | /* Load drop-in directory data */ |
23a177ef | 692 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
87f0e418 LP |
693 | return r; |
694 | ||
23a177ef | 695 | return 0; |
87f0e418 LP |
696 | } |
697 | ||
a16e1123 LP |
698 | /* Common implementation for multiple backends */ |
699 | int unit_load_nop(Unit *u) { | |
700 | assert(u); | |
701 | ||
702 | if (u->meta.load_state == UNIT_STUB) | |
703 | u->meta.load_state = UNIT_LOADED; | |
704 | ||
705 | return 0; | |
706 | } | |
707 | ||
87f0e418 LP |
708 | int unit_load(Unit *u) { |
709 | int r; | |
710 | ||
711 | assert(u); | |
712 | ||
713 | if (u->meta.in_load_queue) { | |
714 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
715 | u->meta.in_load_queue = false; | |
716 | } | |
717 | ||
e537352b LP |
718 | if (u->meta.type == _UNIT_TYPE_INVALID) |
719 | return -EINVAL; | |
720 | ||
87f0e418 LP |
721 | if (u->meta.load_state != UNIT_STUB) |
722 | return 0; | |
723 | ||
e537352b LP |
724 | if (UNIT_VTABLE(u)->load) |
725 | if ((r = UNIT_VTABLE(u)->load(u)) < 0) | |
87f0e418 | 726 | goto fail; |
23a177ef | 727 | |
e537352b | 728 | if (u->meta.load_state == UNIT_STUB) { |
23a177ef LP |
729 | r = -ENOENT; |
730 | goto fail; | |
731 | } | |
732 | ||
23a177ef LP |
733 | assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into); |
734 | ||
735 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 736 | unit_add_to_gc_queue(u); |
87f0e418 | 737 | |
87f0e418 LP |
738 | return 0; |
739 | ||
740 | fail: | |
741 | u->meta.load_state = UNIT_FAILED; | |
c1e1601e | 742 | unit_add_to_dbus_queue(u); |
23a177ef | 743 | |
54165a39 | 744 | log_notice("Failed to load configuration for %s: %s", u->meta.id, strerror(-r)); |
23a177ef | 745 | |
87f0e418 LP |
746 | return r; |
747 | } | |
748 | ||
749 | /* Errors: | |
d5159713 LP |
750 | * -EBADR: This unit type does not support starting. |
751 | * -EALREADY: Unit is already started. | |
752 | * -EAGAIN: An operation is already in progress. Retry later. | |
753 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
754 | */ |
755 | int unit_start(Unit *u) { | |
756 | UnitActiveState state; | |
757 | ||
758 | assert(u); | |
759 | ||
6124958c LP |
760 | if (u->meta.load_state != UNIT_LOADED) |
761 | return -EINVAL; | |
762 | ||
7898b0cf LP |
763 | /* If this is already (being) started, then this will |
764 | * succeed. Note that this will even succeed if this unit is | |
765 | * not startable by the user. This is relied on to detect when | |
766 | * we need to wait for units and when waiting is finished. */ | |
87f0e418 LP |
767 | state = unit_active_state(u); |
768 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
769 | return -EALREADY; | |
770 | ||
7898b0cf LP |
771 | /* If it is stopped, but we cannot start it, then fail */ |
772 | if (!UNIT_VTABLE(u)->start) | |
773 | return -EBADR; | |
774 | ||
87f0e418 LP |
775 | /* We don't suppress calls to ->start() here when we are |
776 | * already starting, to allow this request to be used as a | |
777 | * "hurry up" call, for example when the unit is in some "auto | |
778 | * restart" state where it waits for a holdoff timer to elapse | |
779 | * before it will start again. */ | |
780 | ||
c1e1601e | 781 | unit_add_to_dbus_queue(u); |
9e58ff9c LP |
782 | |
783 | unit_status_printf(u, "Starting %s...\n", unit_description(u)); | |
784 | ||
87f0e418 LP |
785 | return UNIT_VTABLE(u)->start(u); |
786 | } | |
787 | ||
788 | bool unit_can_start(Unit *u) { | |
789 | assert(u); | |
790 | ||
791 | return !!UNIT_VTABLE(u)->start; | |
792 | } | |
793 | ||
794 | /* Errors: | |
795 | * -EBADR: This unit type does not support stopping. | |
796 | * -EALREADY: Unit is already stopped. | |
797 | * -EAGAIN: An operation is already in progress. Retry later. | |
798 | */ | |
799 | int unit_stop(Unit *u) { | |
800 | UnitActiveState state; | |
801 | ||
802 | assert(u); | |
803 | ||
87f0e418 | 804 | state = unit_active_state(u); |
6124958c | 805 | if (UNIT_IS_INACTIVE_OR_MAINTENANCE(state)) |
87f0e418 LP |
806 | return -EALREADY; |
807 | ||
7898b0cf LP |
808 | if (!UNIT_VTABLE(u)->stop) |
809 | return -EBADR; | |
810 | ||
c1e1601e | 811 | unit_add_to_dbus_queue(u); |
9e58ff9c LP |
812 | |
813 | unit_status_printf(u, "Stopping %s...\n", unit_description(u)); | |
814 | ||
87f0e418 LP |
815 | return UNIT_VTABLE(u)->stop(u); |
816 | } | |
817 | ||
818 | /* Errors: | |
819 | * -EBADR: This unit type does not support reloading. | |
820 | * -ENOEXEC: Unit is not started. | |
821 | * -EAGAIN: An operation is already in progress. Retry later. | |
822 | */ | |
823 | int unit_reload(Unit *u) { | |
824 | UnitActiveState state; | |
825 | ||
826 | assert(u); | |
827 | ||
6124958c LP |
828 | if (u->meta.load_state != UNIT_LOADED) |
829 | return -EINVAL; | |
830 | ||
87f0e418 LP |
831 | if (!unit_can_reload(u)) |
832 | return -EBADR; | |
833 | ||
834 | state = unit_active_state(u); | |
032ff4af | 835 | if (unit_active_state(u) == UNIT_RELOADING) |
87f0e418 LP |
836 | return -EALREADY; |
837 | ||
838 | if (unit_active_state(u) != UNIT_ACTIVE) | |
839 | return -ENOEXEC; | |
840 | ||
c1e1601e | 841 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
842 | return UNIT_VTABLE(u)->reload(u); |
843 | } | |
844 | ||
845 | bool unit_can_reload(Unit *u) { | |
846 | assert(u); | |
847 | ||
848 | if (!UNIT_VTABLE(u)->reload) | |
849 | return false; | |
850 | ||
851 | if (!UNIT_VTABLE(u)->can_reload) | |
852 | return true; | |
853 | ||
854 | return UNIT_VTABLE(u)->can_reload(u); | |
855 | } | |
856 | ||
f3bff0eb LP |
857 | static void unit_check_uneeded(Unit *u) { |
858 | Iterator i; | |
859 | Unit *other; | |
860 | ||
861 | assert(u); | |
862 | ||
863 | /* If this service shall be shut down when unneeded then do | |
864 | * so. */ | |
865 | ||
866 | if (!u->meta.stop_when_unneeded) | |
867 | return; | |
868 | ||
869 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
870 | return; | |
871 | ||
872 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i) | |
873 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
874 | return; | |
875 | ||
9e2f7c11 | 876 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
f3bff0eb LP |
877 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
878 | return; | |
879 | ||
880 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i) | |
881 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
882 | return; | |
883 | ||
54165a39 | 884 | log_info("Service %s is not needed anymore. Stopping.", u->meta.id); |
f3bff0eb LP |
885 | |
886 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
398ef8ba | 887 | manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
888 | } |
889 | ||
87f0e418 LP |
890 | static void retroactively_start_dependencies(Unit *u) { |
891 | Iterator i; | |
892 | Unit *other; | |
893 | ||
894 | assert(u); | |
895 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
896 | ||
897 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
898 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 899 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 900 | |
9e2f7c11 | 901 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
87f0e418 | 902 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
398ef8ba | 903 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 LP |
904 | |
905 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) | |
906 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 907 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
908 | |
909 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) | |
910 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 911 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 LP |
912 | |
913 | SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i) | |
914 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 915 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
916 | } |
917 | ||
918 | static void retroactively_stop_dependencies(Unit *u) { | |
919 | Iterator i; | |
920 | Unit *other; | |
921 | ||
922 | assert(u); | |
923 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
924 | ||
f3bff0eb LP |
925 | if (u->meta.recursive_stop) { |
926 | /* Pull down units need us recursively if enabled */ | |
927 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i) | |
928 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
398ef8ba | 929 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
f3bff0eb LP |
930 | } |
931 | ||
932 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
933 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
87f0e418 | 934 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
f3bff0eb | 935 | unit_check_uneeded(other); |
9e2f7c11 | 936 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb LP |
937 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
938 | unit_check_uneeded(other); | |
939 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) | |
940 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
941 | unit_check_uneeded(other); | |
942 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) | |
943 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
944 | unit_check_uneeded(other); | |
9e2f7c11 | 945 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb LP |
946 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
947 | unit_check_uneeded(other); | |
87f0e418 LP |
948 | } |
949 | ||
950 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) { | |
63983207 | 951 | dual_timestamp ts; |
7e6e7b06 | 952 | bool unexpected; |
a096ed36 | 953 | |
87f0e418 LP |
954 | assert(u); |
955 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
956 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 957 | |
8e471ccd LP |
958 | /* Note that this is called for all low-level state changes, |
959 | * even if they might map to the same high-level | |
960 | * UnitActiveState! That means that ns == os is OK an expected | |
961 | * behaviour here. For example: if a mount point is remounted | |
962 | * this function will be called too and the utmp code below | |
963 | * relies on that! */ | |
87f0e418 | 964 | |
63983207 | 965 | dual_timestamp_get(&ts); |
173e3821 | 966 | |
6124958c | 967 | if (UNIT_IS_INACTIVE_OR_MAINTENANCE(os) && !UNIT_IS_INACTIVE_OR_MAINTENANCE(ns)) |
173e3821 | 968 | u->meta.inactive_exit_timestamp = ts; |
6124958c | 969 | else if (!UNIT_IS_INACTIVE_OR_MAINTENANCE(os) && UNIT_IS_INACTIVE_OR_MAINTENANCE(ns)) |
173e3821 LP |
970 | u->meta.inactive_enter_timestamp = ts; |
971 | ||
87f0e418 | 972 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
173e3821 | 973 | u->meta.active_enter_timestamp = ts; |
87f0e418 | 974 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
173e3821 | 975 | u->meta.active_exit_timestamp = ts; |
87f0e418 | 976 | |
1e001f52 LP |
977 | if (ns != os && ns == UNIT_MAINTENANCE) |
978 | log_notice("Unit %s entered maintenance state.", u->meta.id); | |
979 | ||
fb385181 LP |
980 | if (UNIT_IS_INACTIVE_OR_MAINTENANCE(ns)) |
981 | cgroup_bonding_trim_list(u->meta.cgroup_bondings, true); | |
982 | ||
871d7de4 | 983 | timer_unit_notify(u, ns); |
01f78473 | 984 | path_unit_notify(u, ns); |
871d7de4 | 985 | |
87f0e418 | 986 | if (u->meta.job) { |
7e6e7b06 | 987 | unexpected = false; |
87f0e418 LP |
988 | |
989 | if (u->meta.job->state == JOB_WAITING) | |
990 | ||
991 | /* So we reached a different state for this | |
992 | * job. Let's see if we can run it now if it | |
993 | * failed previously due to EAGAIN. */ | |
c1e1601e | 994 | job_add_to_run_queue(u->meta.job); |
87f0e418 | 995 | |
87f0e418 | 996 | |
b410e6b9 LP |
997 | /* Let's check whether this state change constitutes a |
998 | * finished job, or maybe cotradicts a running job and | |
999 | * hence needs to invalidate jobs. */ | |
87f0e418 | 1000 | |
b410e6b9 | 1001 | switch (u->meta.job->type) { |
87f0e418 | 1002 | |
b410e6b9 LP |
1003 | case JOB_START: |
1004 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1005 | |
b410e6b9 LP |
1006 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
1007 | job_finish_and_invalidate(u->meta.job, true); | |
1008 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
1009 | unexpected = true; | |
1010 | job_finish_and_invalidate(u->meta.job, false); | |
1011 | } | |
87f0e418 | 1012 | |
b410e6b9 | 1013 | break; |
87f0e418 | 1014 | |
b410e6b9 LP |
1015 | case JOB_RELOAD: |
1016 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1017 | |
b410e6b9 | 1018 | if (u->meta.job->state == JOB_RUNNING) { |
a096ed36 | 1019 | if (ns == UNIT_ACTIVE) |
87f0e418 | 1020 | job_finish_and_invalidate(u->meta.job, true); |
032ff4af | 1021 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1022 | unexpected = true; |
87f0e418 | 1023 | job_finish_and_invalidate(u->meta.job, false); |
a096ed36 | 1024 | } |
b410e6b9 | 1025 | } |
87f0e418 | 1026 | |
b410e6b9 | 1027 | break; |
87f0e418 | 1028 | |
b410e6b9 LP |
1029 | case JOB_STOP: |
1030 | case JOB_RESTART: | |
1031 | case JOB_TRY_RESTART: | |
87f0e418 | 1032 | |
9aab5a73 | 1033 | if (ns == UNIT_INACTIVE || ns == UNIT_MAINTENANCE) |
b410e6b9 LP |
1034 | job_finish_and_invalidate(u->meta.job, true); |
1035 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
1036 | unexpected = true; | |
1037 | job_finish_and_invalidate(u->meta.job, false); | |
1038 | } | |
87f0e418 | 1039 | |
b410e6b9 | 1040 | break; |
87f0e418 | 1041 | |
b410e6b9 LP |
1042 | default: |
1043 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1044 | } |
87f0e418 | 1045 | |
7e6e7b06 LP |
1046 | } else |
1047 | unexpected = true; | |
1048 | ||
9f611ad8 LP |
1049 | /* If this state change happened without being requested by a |
1050 | * job, then let's retroactively start or stop | |
1051 | * dependencies. We skip that step when deserializing, since | |
1052 | * we don't want to create any additional jobs just because | |
1053 | * something is already activated. */ | |
1054 | ||
1055 | if (unexpected && u->meta.manager->n_deserializing <= 0) { | |
7e6e7b06 LP |
1056 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) |
1057 | retroactively_start_dependencies(u); | |
1058 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1059 | retroactively_stop_dependencies(u); | |
a096ed36 | 1060 | } |
f3bff0eb | 1061 | |
e537352b LP |
1062 | /* Some names are special */ |
1063 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
f278026d | 1064 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) { |
e537352b LP |
1065 | /* The bus just might have become available, |
1066 | * hence try to connect to it, if we aren't | |
1067 | * yet connected. */ | |
5e8d1c9a | 1068 | bus_init(u->meta.manager); |
f278026d LP |
1069 | } |
1070 | ||
e537352b LP |
1071 | if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) |
1072 | /* The syslog daemon just might have become | |
1073 | * available, hence try to connect to it, if | |
1074 | * we aren't yet connected. */ | |
843d2643 | 1075 | log_open(); |
f278026d | 1076 | |
e537352b LP |
1077 | if (u->meta.type == UNIT_MOUNT) |
1078 | /* Another directory became available, let's | |
1079 | * check if that is enough to write our utmp | |
1080 | * entry. */ | |
1081 | manager_write_utmp_reboot(u->meta.manager); | |
1082 | ||
1083 | if (u->meta.type == UNIT_TARGET) | |
1084 | /* A target got activated, maybe this is a runlevel? */ | |
1085 | manager_write_utmp_runlevel(u->meta.manager, u); | |
1086 | ||
1087 | } else if (!UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
f278026d LP |
1088 | |
1089 | if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) | |
e537352b LP |
1090 | /* The syslog daemon might just have |
1091 | * terminated, hence try to disconnect from | |
1092 | * it. */ | |
2882c7ed | 1093 | log_close_syslog(); |
f278026d LP |
1094 | |
1095 | /* We don't care about D-Bus here, since we'll get an | |
1096 | * asynchronous notification for it anyway. */ | |
1097 | } | |
1098 | ||
f3bff0eb LP |
1099 | /* Maybe we finished startup and are now ready for being |
1100 | * stopped because unneeded? */ | |
1101 | unit_check_uneeded(u); | |
c1e1601e LP |
1102 | |
1103 | unit_add_to_dbus_queue(u); | |
701cc384 | 1104 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1105 | } |
1106 | ||
acbb0225 | 1107 | int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 LP |
1108 | struct epoll_event ev; |
1109 | ||
1110 | assert(u); | |
1111 | assert(fd >= 0); | |
acbb0225 | 1112 | assert(w); |
ea430986 | 1113 | assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
87f0e418 LP |
1114 | |
1115 | zero(ev); | |
acbb0225 | 1116 | ev.data.ptr = w; |
87f0e418 LP |
1117 | ev.events = events; |
1118 | ||
acbb0225 LP |
1119 | if (epoll_ctl(u->meta.manager->epoll_fd, |
1120 | w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, | |
1121 | fd, | |
1122 | &ev) < 0) | |
1123 | return -errno; | |
87f0e418 | 1124 | |
acbb0225 LP |
1125 | w->fd = fd; |
1126 | w->type = WATCH_FD; | |
ea430986 | 1127 | w->data.unit = u; |
87f0e418 | 1128 | |
acbb0225 | 1129 | return 0; |
87f0e418 LP |
1130 | } |
1131 | ||
acbb0225 | 1132 | void unit_unwatch_fd(Unit *u, Watch *w) { |
87f0e418 | 1133 | assert(u); |
acbb0225 | 1134 | assert(w); |
87f0e418 | 1135 | |
acbb0225 LP |
1136 | if (w->type == WATCH_INVALID) |
1137 | return; | |
1138 | ||
ea430986 LP |
1139 | assert(w->type == WATCH_FD); |
1140 | assert(w->data.unit == u); | |
acbb0225 LP |
1141 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
1142 | ||
1143 | w->fd = -1; | |
1144 | w->type = WATCH_INVALID; | |
ea430986 | 1145 | w->data.unit = NULL; |
87f0e418 LP |
1146 | } |
1147 | ||
1148 | int unit_watch_pid(Unit *u, pid_t pid) { | |
1149 | assert(u); | |
1150 | assert(pid >= 1); | |
1151 | ||
05e343b7 LP |
1152 | /* Watch a specific PID. We only support one unit watching |
1153 | * each PID for now. */ | |
1154 | ||
c6c18be3 | 1155 | return hashmap_put(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1156 | } |
1157 | ||
1158 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1159 | assert(u); | |
1160 | assert(pid >= 1); | |
1161 | ||
c6c18be3 | 1162 | hashmap_remove_value(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1163 | } |
1164 | ||
acbb0225 | 1165 | int unit_watch_timer(Unit *u, usec_t delay, Watch *w) { |
87f0e418 | 1166 | struct itimerspec its; |
acbb0225 | 1167 | int flags, fd; |
87f0e418 LP |
1168 | bool ours; |
1169 | ||
1170 | assert(u); | |
acbb0225 | 1171 | assert(w); |
ea430986 | 1172 | assert(w->type == WATCH_INVALID || (w->type == WATCH_TIMER && w->data.unit == u)); |
87f0e418 LP |
1173 | |
1174 | /* This will try to reuse the old timer if there is one */ | |
1175 | ||
acbb0225 | 1176 | if (w->type == WATCH_TIMER) { |
87f0e418 | 1177 | ours = false; |
acbb0225 | 1178 | fd = w->fd; |
87f0e418 LP |
1179 | } else { |
1180 | ours = true; | |
87f0e418 LP |
1181 | if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) |
1182 | return -errno; | |
1183 | } | |
1184 | ||
1185 | zero(its); | |
1186 | ||
1187 | if (delay <= 0) { | |
1188 | /* Set absolute time in the past, but not 0, since we | |
1189 | * don't want to disarm the timer */ | |
1190 | its.it_value.tv_sec = 0; | |
1191 | its.it_value.tv_nsec = 1; | |
1192 | ||
1193 | flags = TFD_TIMER_ABSTIME; | |
1194 | } else { | |
1195 | timespec_store(&its.it_value, delay); | |
1196 | flags = 0; | |
1197 | } | |
1198 | ||
1199 | /* This will also flush the elapse counter */ | |
1200 | if (timerfd_settime(fd, flags, &its, NULL) < 0) | |
1201 | goto fail; | |
1202 | ||
acbb0225 LP |
1203 | if (w->type == WATCH_INVALID) { |
1204 | struct epoll_event ev; | |
87f0e418 | 1205 | |
acbb0225 LP |
1206 | zero(ev); |
1207 | ev.data.ptr = w; | |
f94ea366 | 1208 | ev.events = EPOLLIN; |
acbb0225 LP |
1209 | |
1210 | if (epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) | |
1211 | goto fail; | |
1212 | } | |
1213 | ||
1214 | w->fd = fd; | |
1215 | w->type = WATCH_TIMER; | |
ea430986 | 1216 | w->data.unit = u; |
87f0e418 | 1217 | |
87f0e418 LP |
1218 | return 0; |
1219 | ||
1220 | fail: | |
1221 | if (ours) | |
ea430986 | 1222 | close_nointr_nofail(fd); |
87f0e418 LP |
1223 | |
1224 | return -errno; | |
1225 | } | |
1226 | ||
acbb0225 | 1227 | void unit_unwatch_timer(Unit *u, Watch *w) { |
87f0e418 | 1228 | assert(u); |
acbb0225 | 1229 | assert(w); |
87f0e418 | 1230 | |
acbb0225 | 1231 | if (w->type == WATCH_INVALID) |
87f0e418 LP |
1232 | return; |
1233 | ||
ea430986 | 1234 | assert(w->type == WATCH_TIMER && w->data.unit == u); |
acbb0225 LP |
1235 | |
1236 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); | |
a16e1123 | 1237 | close_nointr_nofail(w->fd); |
acbb0225 LP |
1238 | |
1239 | w->fd = -1; | |
1240 | w->type = WATCH_INVALID; | |
ea430986 | 1241 | w->data.unit = NULL; |
87f0e418 LP |
1242 | } |
1243 | ||
1244 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
1245 | assert(u); | |
1246 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1247 | ||
1248 | switch (j) { | |
1249 | ||
1250 | case JOB_VERIFY_ACTIVE: | |
1251 | case JOB_START: | |
1252 | return true; | |
1253 | ||
1254 | case JOB_STOP: | |
1255 | case JOB_RESTART: | |
1256 | case JOB_TRY_RESTART: | |
1257 | return unit_can_start(u); | |
1258 | ||
1259 | case JOB_RELOAD: | |
1260 | return unit_can_reload(u); | |
1261 | ||
1262 | case JOB_RELOAD_OR_START: | |
1263 | return unit_can_reload(u) && unit_can_start(u); | |
1264 | ||
1265 | default: | |
1266 | assert_not_reached("Invalid job type"); | |
1267 | } | |
1268 | } | |
1269 | ||
701cc384 | 1270 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1271 | |
1272 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1273 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1274 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1275 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1276 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1277 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 | 1278 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1279 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 LP |
1280 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
1281 | [UNIT_CONFLICTS] = UNIT_CONFLICTS, | |
1282 | [UNIT_BEFORE] = UNIT_AFTER, | |
701cc384 LP |
1283 | [UNIT_AFTER] = UNIT_BEFORE, |
1284 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, | |
1285 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES | |
87f0e418 | 1286 | }; |
701cc384 | 1287 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1288 | |
1289 | assert(u); | |
1290 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
1291 | assert(inverse_table[d] != _UNIT_DEPENDENCY_INVALID); | |
1292 | assert(other); | |
1293 | ||
1294 | /* We won't allow dependencies on ourselves. We will not | |
1295 | * consider them an error however. */ | |
1296 | if (u == other) | |
1297 | return 0; | |
1298 | ||
9e2f7c11 LP |
1299 | if (UNIT_VTABLE(u)->no_requires && |
1300 | (d == UNIT_REQUIRES || | |
1301 | d == UNIT_REQUIRES_OVERRIDABLE || | |
1302 | d == UNIT_REQUISITE || | |
1303 | d == UNIT_REQUISITE_OVERRIDABLE)) { | |
1304 | return -EINVAL; | |
1305 | } | |
1306 | ||
701cc384 LP |
1307 | if ((r = set_ensure_allocated(&u->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0 || |
1308 | (r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) | |
87f0e418 LP |
1309 | return r; |
1310 | ||
701cc384 LP |
1311 | if (add_reference) |
1312 | if ((r = set_ensure_allocated(&u->meta.dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 || | |
1313 | (r = set_ensure_allocated(&other->meta.dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0) | |
1314 | return r; | |
87f0e418 | 1315 | |
701cc384 LP |
1316 | if ((q = set_put(u->meta.dependencies[d], other)) < 0) |
1317 | return q; | |
87f0e418 | 1318 | |
701cc384 LP |
1319 | if ((v = set_put(other->meta.dependencies[inverse_table[d]], u)) < 0) { |
1320 | r = v; | |
1321 | goto fail; | |
1322 | } | |
1323 | ||
1324 | if (add_reference) { | |
1325 | if ((w = set_put(u->meta.dependencies[UNIT_REFERENCES], other)) < 0) { | |
1326 | r = w; | |
1327 | goto fail; | |
1328 | } | |
1329 | ||
1330 | if ((r = set_put(other->meta.dependencies[UNIT_REFERENCED_BY], u)) < 0) | |
1331 | goto fail; | |
87f0e418 LP |
1332 | } |
1333 | ||
c1e1601e | 1334 | unit_add_to_dbus_queue(u); |
87f0e418 | 1335 | return 0; |
701cc384 LP |
1336 | |
1337 | fail: | |
1338 | if (q > 0) | |
1339 | set_remove(u->meta.dependencies[d], other); | |
1340 | ||
1341 | if (v > 0) | |
1342 | set_remove(other->meta.dependencies[inverse_table[d]], u); | |
1343 | ||
1344 | if (w > 0) | |
1345 | set_remove(u->meta.dependencies[UNIT_REFERENCES], other); | |
1346 | ||
1347 | return r; | |
87f0e418 | 1348 | } |
0301abf4 | 1349 | |
2c966c03 LP |
1350 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
1351 | int r; | |
1352 | ||
1353 | assert(u); | |
1354 | ||
1355 | if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) | |
1356 | return r; | |
1357 | ||
1358 | if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) | |
1359 | return r; | |
1360 | ||
1361 | return 0; | |
1362 | } | |
1363 | ||
9e2f7c11 LP |
1364 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1365 | char *s; | |
1366 | ||
1367 | assert(u); | |
1368 | assert(name || path); | |
1369 | ||
1370 | if (!name) | |
1371 | name = file_name_from_path(path); | |
1372 | ||
1373 | if (!unit_name_is_template(name)) { | |
1374 | *p = NULL; | |
1375 | return name; | |
1376 | } | |
1377 | ||
1378 | if (u->meta.instance) | |
1379 | s = unit_name_replace_instance(name, u->meta.instance); | |
1380 | else { | |
1381 | char *i; | |
1382 | ||
1383 | if (!(i = unit_name_to_prefix(u->meta.id))) | |
1384 | return NULL; | |
1385 | ||
1386 | s = unit_name_replace_instance(name, i); | |
1387 | free(i); | |
1388 | } | |
1389 | ||
1390 | if (!s) | |
1391 | return NULL; | |
1392 | ||
1393 | *p = s; | |
1394 | return s; | |
1395 | } | |
1396 | ||
701cc384 | 1397 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
1398 | Unit *other; |
1399 | int r; | |
9e2f7c11 | 1400 | char *s; |
09b6b09f | 1401 | |
9e2f7c11 LP |
1402 | assert(u); |
1403 | assert(name || path); | |
09b6b09f | 1404 | |
9e2f7c11 LP |
1405 | if (!(name = resolve_template(u, name, path, &s))) |
1406 | return -ENOMEM; | |
09b6b09f | 1407 | |
398ef8ba | 1408 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1409 | goto finish; |
1410 | ||
701cc384 | 1411 | r = unit_add_dependency(u, d, other, add_reference); |
9e2f7c11 LP |
1412 | |
1413 | finish: | |
1414 | free(s); | |
1415 | return r; | |
09b6b09f LP |
1416 | } |
1417 | ||
2c966c03 LP |
1418 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1419 | Unit *other; | |
1420 | int r; | |
1421 | char *s; | |
1422 | ||
1423 | assert(u); | |
1424 | assert(name || path); | |
1425 | ||
1426 | if (!(name = resolve_template(u, name, path, &s))) | |
1427 | return -ENOMEM; | |
1428 | ||
398ef8ba | 1429 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1430 | goto finish; |
1431 | ||
1432 | r = unit_add_two_dependencies(u, d, e, other, add_reference); | |
1433 | ||
1434 | finish: | |
1435 | free(s); | |
1436 | return r; | |
1437 | } | |
1438 | ||
701cc384 | 1439 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
1440 | Unit *other; |
1441 | int r; | |
9e2f7c11 | 1442 | char *s; |
bd77d0fc | 1443 | |
9e2f7c11 LP |
1444 | assert(u); |
1445 | assert(name || path); | |
bd77d0fc | 1446 | |
9e2f7c11 LP |
1447 | if (!(name = resolve_template(u, name, path, &s))) |
1448 | return -ENOMEM; | |
bd77d0fc | 1449 | |
398ef8ba | 1450 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1451 | goto finish; |
1452 | ||
701cc384 | 1453 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 LP |
1454 | |
1455 | finish: | |
1456 | free(s); | |
1457 | return r; | |
bd77d0fc LP |
1458 | } |
1459 | ||
2c966c03 LP |
1460 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1461 | Unit *other; | |
1462 | int r; | |
1463 | char *s; | |
1464 | ||
1465 | assert(u); | |
1466 | assert(name || path); | |
1467 | ||
1468 | if (!(name = resolve_template(u, name, path, &s))) | |
1469 | return -ENOMEM; | |
1470 | ||
398ef8ba | 1471 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1472 | goto finish; |
1473 | ||
1474 | if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) | |
1475 | goto finish; | |
1476 | ||
1477 | finish: | |
1478 | free(s); | |
1479 | return r; | |
1480 | } | |
1481 | ||
0301abf4 LP |
1482 | int set_unit_path(const char *p) { |
1483 | char *cwd, *c; | |
1484 | int r; | |
1485 | ||
1486 | /* This is mostly for debug purposes */ | |
1487 | ||
1488 | if (path_is_absolute(p)) { | |
1489 | if (!(c = strdup(p))) | |
1490 | return -ENOMEM; | |
1491 | } else { | |
1492 | if (!(cwd = get_current_dir_name())) | |
1493 | return -errno; | |
1494 | ||
1495 | r = asprintf(&c, "%s/%s", cwd, p); | |
1496 | free(cwd); | |
1497 | ||
1498 | if (r < 0) | |
1499 | return -ENOMEM; | |
1500 | } | |
1501 | ||
036643a2 | 1502 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) { |
0301abf4 LP |
1503 | r = -errno; |
1504 | free(c); | |
1505 | return r; | |
1506 | } | |
1507 | ||
1508 | return 0; | |
1509 | } | |
88066b3a | 1510 | |
ea430986 LP |
1511 | char *unit_dbus_path(Unit *u) { |
1512 | char *p, *e; | |
1513 | ||
1514 | assert(u); | |
1515 | ||
9e2f7c11 | 1516 | if (!(e = bus_path_escape(u->meta.id))) |
ea430986 LP |
1517 | return NULL; |
1518 | ||
35d2e7ec | 1519 | p = strappend("/org/freedesktop/systemd1/unit/", e); |
ea430986 | 1520 | free(e); |
35d2e7ec | 1521 | |
ea430986 LP |
1522 | return p; |
1523 | } | |
1524 | ||
8e274523 LP |
1525 | int unit_add_cgroup(Unit *u, CGroupBonding *b) { |
1526 | CGroupBonding *l; | |
1527 | int r; | |
1528 | ||
1529 | assert(u); | |
1530 | assert(b); | |
35d2e7ec | 1531 | |
8e274523 LP |
1532 | assert(b->path); |
1533 | ||
35d2e7ec LP |
1534 | if (!b->controller) |
1535 | if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER))) | |
1536 | return -ENOMEM; | |
1537 | ||
8e274523 LP |
1538 | /* Ensure this hasn't been added yet */ |
1539 | assert(!b->unit); | |
1540 | ||
1541 | l = hashmap_get(u->meta.manager->cgroup_bondings, b->path); | |
1542 | LIST_PREPEND(CGroupBonding, by_path, l, b); | |
1543 | ||
1544 | if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) { | |
1545 | LIST_REMOVE(CGroupBonding, by_path, l, b); | |
1546 | return r; | |
1547 | } | |
1548 | ||
1549 | LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b); | |
1550 | b->unit = u; | |
1551 | ||
1552 | return 0; | |
1553 | } | |
1554 | ||
013b87c0 LP |
1555 | static char *default_cgroup_path(Unit *u) { |
1556 | char *p; | |
4f2d528d | 1557 | int r; |
013b87c0 LP |
1558 | |
1559 | assert(u); | |
1560 | ||
4f2d528d LP |
1561 | if (u->meta.instance) { |
1562 | char *t; | |
013b87c0 | 1563 | |
4f2d528d LP |
1564 | if (!(t = unit_name_template(u->meta.id))) |
1565 | return NULL; | |
1566 | ||
1567 | r = asprintf(&p, "%s/%s/%s", u->meta.manager->cgroup_hierarchy, t, u->meta.instance); | |
1568 | free(t); | |
1569 | } else | |
1570 | r = asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, u->meta.id); | |
1571 | ||
1572 | return r < 0 ? NULL : p; | |
013b87c0 LP |
1573 | } |
1574 | ||
8e274523 | 1575 | int unit_add_cgroup_from_text(Unit *u, const char *name) { |
013b87c0 LP |
1576 | char *controller = NULL, *path = NULL; |
1577 | CGroupBonding *b = NULL; | |
8e274523 LP |
1578 | int r; |
1579 | ||
1580 | assert(u); | |
1581 | assert(name); | |
1582 | ||
35d2e7ec LP |
1583 | if ((r = cg_split_spec(name, &controller, &path)) < 0) |
1584 | return r; | |
8e274523 | 1585 | |
35d2e7ec LP |
1586 | if (!path) |
1587 | path = default_cgroup_path(u); | |
013b87c0 | 1588 | |
35d2e7ec | 1589 | if (!controller) |
55096547 | 1590 | controller = strdup(SYSTEMD_CGROUP_CONTROLLER); |
013b87c0 | 1591 | |
35d2e7ec LP |
1592 | if (!path || !controller) { |
1593 | free(path); | |
1594 | free(controller); | |
1595 | ||
1596 | return -ENOMEM; | |
8e274523 LP |
1597 | } |
1598 | ||
013b87c0 LP |
1599 | if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) { |
1600 | r = -EEXIST; | |
1601 | goto fail; | |
1602 | } | |
8e274523 | 1603 | |
013b87c0 | 1604 | if (!(b = new0(CGroupBonding, 1))) { |
8e274523 LP |
1605 | r = -ENOMEM; |
1606 | goto fail; | |
1607 | } | |
1608 | ||
013b87c0 LP |
1609 | b->controller = controller; |
1610 | b->path = path; | |
8e274523 LP |
1611 | b->only_us = false; |
1612 | b->clean_up = false; | |
1613 | ||
1614 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1615 | goto fail; | |
1616 | ||
1617 | return 0; | |
1618 | ||
1619 | fail: | |
013b87c0 LP |
1620 | free(path); |
1621 | free(controller); | |
8e274523 LP |
1622 | free(b); |
1623 | ||
1624 | return r; | |
1625 | } | |
1626 | ||
1627 | int unit_add_default_cgroup(Unit *u) { | |
1628 | CGroupBonding *b; | |
1629 | int r = -ENOMEM; | |
1630 | ||
1631 | assert(u); | |
1632 | ||
1633 | /* Adds in the default cgroup data, if it wasn't specified yet */ | |
1634 | ||
1635 | if (unit_get_default_cgroup(u)) | |
1636 | return 0; | |
1637 | ||
1638 | if (!(b = new0(CGroupBonding, 1))) | |
1639 | return -ENOMEM; | |
1640 | ||
013b87c0 | 1641 | if (!(b->path = default_cgroup_path(u))) |
8e274523 LP |
1642 | goto fail; |
1643 | ||
1644 | b->clean_up = true; | |
1645 | b->only_us = true; | |
1646 | ||
1647 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1648 | goto fail; | |
1649 | ||
1650 | return 0; | |
1651 | ||
1652 | fail: | |
1653 | free(b->path); | |
1654 | free(b->controller); | |
1655 | free(b); | |
1656 | ||
1657 | return r; | |
1658 | } | |
1659 | ||
1660 | CGroupBonding* unit_get_default_cgroup(Unit *u) { | |
1661 | assert(u); | |
1662 | ||
55096547 | 1663 | return cgroup_bonding_find_list(u->meta.cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER); |
8e274523 LP |
1664 | } |
1665 | ||
f6ff8c29 LP |
1666 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
1667 | char *t; | |
1668 | int r; | |
1669 | ||
1670 | assert(u); | |
1671 | assert(type); | |
1672 | assert(_found); | |
1673 | ||
9e2f7c11 | 1674 | if (!(t = unit_name_change_suffix(u->meta.id, type))) |
f6ff8c29 LP |
1675 | return -ENOMEM; |
1676 | ||
1677 | assert(!unit_has_name(u, t)); | |
1678 | ||
398ef8ba | 1679 | r = manager_load_unit(u->meta.manager, t, NULL, NULL, _found); |
f6ff8c29 LP |
1680 | free(t); |
1681 | ||
9e2f7c11 | 1682 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
1683 | |
1684 | return r; | |
1685 | } | |
1686 | ||
a16e1123 LP |
1687 | int unit_get_related_unit(Unit *u, const char *type, Unit **_found) { |
1688 | Unit *found; | |
1689 | char *t; | |
1690 | ||
1691 | assert(u); | |
1692 | assert(type); | |
1693 | assert(_found); | |
1694 | ||
1695 | if (!(t = unit_name_change_suffix(u->meta.id, type))) | |
1696 | return -ENOMEM; | |
1697 | ||
1698 | assert(!unit_has_name(u, t)); | |
1699 | ||
1700 | found = manager_get_unit(u->meta.manager, t); | |
1701 | free(t); | |
1702 | ||
1703 | if (!found) | |
1704 | return -ENOENT; | |
1705 | ||
1706 | *_found = found; | |
1707 | return 0; | |
1708 | } | |
1709 | ||
9e2f7c11 LP |
1710 | static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) { |
1711 | Unit *u = userdata; | |
1712 | assert(u); | |
1713 | ||
1714 | return unit_name_to_prefix_and_instance(u->meta.id); | |
1715 | } | |
1716 | ||
1717 | static char *specifier_prefix(char specifier, void *data, void *userdata) { | |
1718 | Unit *u = userdata; | |
1719 | assert(u); | |
1720 | ||
1721 | return unit_name_to_prefix(u->meta.id); | |
1722 | } | |
1723 | ||
1724 | static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) { | |
1725 | Unit *u = userdata; | |
1726 | char *p, *r; | |
1727 | ||
1728 | assert(u); | |
1729 | ||
1730 | if (!(p = unit_name_to_prefix(u->meta.id))) | |
1731 | return NULL; | |
1732 | ||
1733 | r = unit_name_unescape(p); | |
1734 | free(p); | |
1735 | ||
1736 | return r; | |
1737 | } | |
1738 | ||
1739 | static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) { | |
1740 | Unit *u = userdata; | |
1741 | assert(u); | |
1742 | ||
1743 | if (u->meta.instance) | |
1744 | return unit_name_unescape(u->meta.instance); | |
1745 | ||
1746 | return strdup(""); | |
1747 | } | |
1748 | ||
1749 | char *unit_name_printf(Unit *u, const char* format) { | |
1750 | ||
1751 | /* | |
1752 | * This will use the passed string as format string and | |
1753 | * replace the following specifiers: | |
1754 | * | |
1755 | * %n: the full id of the unit (foo@bar.waldo) | |
1756 | * %N: the id of the unit without the suffix (foo@bar) | |
1757 | * %p: the prefix (foo) | |
1758 | * %i: the instance (bar) | |
1759 | */ | |
1760 | ||
1761 | const Specifier table[] = { | |
1762 | { 'n', specifier_string, u->meta.id }, | |
1763 | { 'N', specifier_prefix_and_instance, NULL }, | |
1764 | { 'p', specifier_prefix, NULL }, | |
1765 | { 'i', specifier_string, u->meta.instance }, | |
1766 | { 0, NULL, NULL } | |
1767 | }; | |
1768 | ||
1769 | assert(u); | |
1770 | assert(format); | |
1771 | ||
1772 | return specifier_printf(format, table, u); | |
1773 | } | |
1774 | ||
1775 | char *unit_full_printf(Unit *u, const char *format) { | |
1776 | ||
1777 | /* This is similar to unit_name_printf() but also supports | |
1778 | * unescaping */ | |
1779 | ||
1780 | const Specifier table[] = { | |
1781 | { 'n', specifier_string, u->meta.id }, | |
1782 | { 'N', specifier_prefix_and_instance, NULL }, | |
1783 | { 'p', specifier_prefix, NULL }, | |
1784 | { 'P', specifier_prefix_unescaped, NULL }, | |
1785 | { 'i', specifier_string, u->meta.instance }, | |
1786 | { 'I', specifier_instance_unescaped, NULL }, | |
1787 | { 0, NULL, NULL } | |
1788 | }; | |
1789 | ||
1790 | assert(u); | |
1791 | assert(format); | |
1792 | ||
1793 | return specifier_printf(format, table, u); | |
1794 | } | |
1795 | ||
1796 | char **unit_full_printf_strv(Unit *u, char **l) { | |
1797 | size_t n; | |
1798 | char **r, **i, **j; | |
1799 | ||
1800 | /* Applies unit_full_printf to every entry in l */ | |
1801 | ||
1802 | assert(u); | |
1803 | ||
1804 | n = strv_length(l); | |
1805 | if (!(r = new(char*, n+1))) | |
1806 | return NULL; | |
1807 | ||
1808 | for (i = l, j = r; *i; i++, j++) | |
1809 | if (!(*j = unit_full_printf(u, *i))) | |
1810 | goto fail; | |
1811 | ||
1812 | *j = NULL; | |
1813 | return r; | |
1814 | ||
1815 | fail: | |
1816 | j--; | |
1817 | while (j >= r) | |
1818 | free(*j); | |
1819 | ||
1820 | free(r); | |
1821 | ||
1822 | return NULL; | |
1823 | } | |
1824 | ||
05e343b7 LP |
1825 | int unit_watch_bus_name(Unit *u, const char *name) { |
1826 | assert(u); | |
1827 | assert(name); | |
1828 | ||
1829 | /* Watch a specific name on the bus. We only support one unit | |
1830 | * watching each name for now. */ | |
1831 | ||
1832 | return hashmap_put(u->meta.manager->watch_bus, name, u); | |
1833 | } | |
1834 | ||
1835 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
1836 | assert(u); | |
1837 | assert(name); | |
1838 | ||
1839 | hashmap_remove_value(u->meta.manager->watch_bus, name, u); | |
1840 | } | |
1841 | ||
a16e1123 LP |
1842 | bool unit_can_serialize(Unit *u) { |
1843 | assert(u); | |
1844 | ||
1845 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
1846 | } | |
1847 | ||
1848 | int unit_serialize(Unit *u, FILE *f, FDSet *fds) { | |
1849 | int r; | |
1850 | ||
1851 | assert(u); | |
1852 | assert(f); | |
1853 | assert(fds); | |
1854 | ||
1855 | if (!unit_can_serialize(u)) | |
1856 | return 0; | |
1857 | ||
1858 | if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0) | |
1859 | return r; | |
1860 | ||
cca098b0 LP |
1861 | if (u->meta.job) |
1862 | unit_serialize_item(u, f, "job", job_type_to_string(u->meta.job->type)); | |
1863 | ||
a16e1123 LP |
1864 | /* End marker */ |
1865 | fputc('\n', f); | |
1866 | return 0; | |
1867 | } | |
1868 | ||
1869 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
1870 | va_list ap; | |
1871 | ||
1872 | assert(u); | |
1873 | assert(f); | |
1874 | assert(key); | |
1875 | assert(format); | |
1876 | ||
1877 | fputs(key, f); | |
1878 | fputc('=', f); | |
1879 | ||
1880 | va_start(ap, format); | |
1881 | vfprintf(f, format, ap); | |
1882 | va_end(ap); | |
1883 | ||
1884 | fputc('\n', f); | |
1885 | } | |
1886 | ||
1887 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
1888 | assert(u); | |
1889 | assert(f); | |
1890 | assert(key); | |
1891 | assert(value); | |
1892 | ||
1893 | fprintf(f, "%s=%s\n", key, value); | |
1894 | } | |
1895 | ||
1896 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
1897 | int r; | |
1898 | ||
1899 | assert(u); | |
1900 | assert(f); | |
1901 | assert(fds); | |
1902 | ||
1903 | if (!unit_can_serialize(u)) | |
1904 | return 0; | |
1905 | ||
1906 | for (;;) { | |
1907 | char line[1024], *l, *v; | |
1908 | size_t k; | |
1909 | ||
1910 | if (!fgets(line, sizeof(line), f)) { | |
1911 | if (feof(f)) | |
1912 | return 0; | |
1913 | return -errno; | |
1914 | } | |
1915 | ||
1916 | l = strstrip(line); | |
1917 | ||
1918 | /* End marker */ | |
1919 | if (l[0] == 0) | |
1920 | return 0; | |
1921 | ||
1922 | k = strcspn(l, "="); | |
1923 | ||
1924 | if (l[k] == '=') { | |
1925 | l[k] = 0; | |
1926 | v = l+k+1; | |
1927 | } else | |
1928 | v = l+k; | |
1929 | ||
cca098b0 LP |
1930 | if (streq(l, "job")) { |
1931 | JobType type; | |
1932 | ||
1933 | if ((type = job_type_from_string(v)) < 0) | |
1934 | log_debug("Failed to parse job type value %s", v); | |
1935 | else | |
1936 | u->meta.deserialized_job = type; | |
1937 | ||
1938 | continue; | |
1939 | } | |
1940 | ||
a16e1123 LP |
1941 | if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0) |
1942 | return r; | |
1943 | } | |
1944 | } | |
1945 | ||
6e2ef85b LP |
1946 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
1947 | Unit *device; | |
1948 | char *e; | |
1949 | int r; | |
1950 | ||
1951 | assert(u); | |
1952 | ||
1953 | if (!what) | |
1954 | return 0; | |
1955 | ||
1956 | /* Adds in links to the device node that this unit is based on */ | |
1957 | ||
8407a5d0 | 1958 | if (!is_device_path(what)) |
6e2ef85b LP |
1959 | return 0; |
1960 | ||
1961 | if (!(e = unit_name_build_escape(what+1, NULL, ".device"))) | |
1962 | return -ENOMEM; | |
1963 | ||
398ef8ba | 1964 | r = manager_load_unit(u->meta.manager, e, NULL, NULL, &device); |
6e2ef85b LP |
1965 | free(e); |
1966 | ||
1967 | if (r < 0) | |
1968 | return r; | |
1969 | ||
2c966c03 | 1970 | if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, device, true)) < 0) |
6e2ef85b LP |
1971 | return r; |
1972 | ||
1973 | if (wants) | |
1974 | if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0) | |
1975 | return r; | |
1976 | ||
1977 | return 0; | |
1978 | } | |
a16e1123 | 1979 | |
cca098b0 LP |
1980 | int unit_coldplug(Unit *u) { |
1981 | int r; | |
1982 | ||
1983 | assert(u); | |
1984 | ||
1985 | if (UNIT_VTABLE(u)->coldplug) | |
1986 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
1987 | return r; | |
1988 | ||
1989 | if (u->meta.deserialized_job >= 0) { | |
398ef8ba | 1990 | if ((r = manager_add_job(u->meta.manager, u->meta.deserialized_job, u, JOB_FAIL, false, NULL, NULL)) < 0) |
cca098b0 LP |
1991 | return r; |
1992 | ||
1993 | u->meta.deserialized_job = _JOB_TYPE_INVALID; | |
1994 | } | |
1995 | ||
1996 | return 0; | |
1997 | } | |
1998 | ||
9e58ff9c LP |
1999 | void unit_status_printf(Unit *u, const char *format, ...) { |
2000 | va_list ap; | |
2001 | ||
2002 | assert(u); | |
2003 | assert(format); | |
2004 | ||
2005 | if (!UNIT_VTABLE(u)->show_status) | |
2006 | return; | |
2007 | ||
2008 | if (u->meta.manager->running_as != MANAGER_SYSTEM) | |
2009 | return; | |
2010 | ||
2011 | if (!u->meta.manager->show_status) | |
2012 | return; | |
2013 | ||
2014 | if (!manager_is_booting_or_shutting_down(u->meta.manager)) | |
2015 | return; | |
2016 | ||
2017 | va_start(ap, format); | |
2018 | status_vprintf(format, ap); | |
2019 | va_end(ap); | |
2020 | } | |
2021 | ||
94f04347 LP |
2022 | static const char* const unit_type_table[_UNIT_TYPE_MAX] = { |
2023 | [UNIT_SERVICE] = "service", | |
2024 | [UNIT_TIMER] = "timer", | |
2025 | [UNIT_SOCKET] = "socket", | |
2026 | [UNIT_TARGET] = "target", | |
2027 | [UNIT_DEVICE] = "device", | |
2028 | [UNIT_MOUNT] = "mount", | |
2029 | [UNIT_AUTOMOUNT] = "automount", | |
07b0b134 ML |
2030 | [UNIT_SNAPSHOT] = "snapshot", |
2031 | [UNIT_SWAP] = "swap" | |
94f04347 LP |
2032 | }; |
2033 | ||
2034 | DEFINE_STRING_TABLE_LOOKUP(unit_type, UnitType); | |
2035 | ||
2036 | static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = { | |
2037 | [UNIT_STUB] = "stub", | |
2038 | [UNIT_LOADED] = "loaded", | |
23a177ef LP |
2039 | [UNIT_FAILED] = "failed", |
2040 | [UNIT_MERGED] = "merged" | |
94f04347 LP |
2041 | }; |
2042 | ||
2043 | DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState); | |
2044 | ||
2045 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { | |
2046 | [UNIT_ACTIVE] = "active", | |
032ff4af | 2047 | [UNIT_RELOADING] = "reloading", |
94f04347 | 2048 | [UNIT_INACTIVE] = "inactive", |
032ff4af | 2049 | [UNIT_MAINTENANCE] = "maintenance", |
94f04347 LP |
2050 | [UNIT_ACTIVATING] = "activating", |
2051 | [UNIT_DEACTIVATING] = "deactivating" | |
2052 | }; | |
2053 | ||
2054 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
2055 | ||
2056 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
2057 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 2058 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 LP |
2059 | [UNIT_WANTS] = "Wants", |
2060 | [UNIT_REQUISITE] = "Requisite", | |
9e2f7c11 | 2061 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
94f04347 | 2062 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 2063 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
94f04347 LP |
2064 | [UNIT_WANTED_BY] = "WantedBy", |
2065 | [UNIT_CONFLICTS] = "Conflicts", | |
2066 | [UNIT_BEFORE] = "Before", | |
2067 | [UNIT_AFTER] = "After", | |
701cc384 LP |
2068 | [UNIT_REFERENCES] = "References", |
2069 | [UNIT_REFERENCED_BY] = "ReferencedBy" | |
94f04347 LP |
2070 | }; |
2071 | ||
2072 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); | |
50159e6a LP |
2073 | |
2074 | static const char* const kill_mode_table[_KILL_MODE_MAX] = { | |
80876c20 | 2075 | [KILL_CONTROL_GROUP] = "control-group", |
50159e6a | 2076 | [KILL_PROCESS_GROUP] = "process-group", |
80876c20 LP |
2077 | [KILL_PROCESS] = "process", |
2078 | [KILL_NONE] = "none" | |
50159e6a LP |
2079 | }; |
2080 | ||
2081 | DEFINE_STRING_TABLE_LOOKUP(kill_mode, KillMode); |