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663996b3 MS |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
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 Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 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 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
663996b3 MS |
22 | #include <errno.h> |
23 | #include <string.h> | |
663996b3 MS |
24 | #include <stdlib.h> |
25 | #include <unistd.h> | |
26 | #include <sys/stat.h> | |
27 | ||
60f067b4 JS |
28 | #include "sd-id128.h" |
29 | #include "sd-messages.h" | |
663996b3 MS |
30 | #include "set.h" |
31 | #include "unit.h" | |
32 | #include "macro.h" | |
33 | #include "strv.h" | |
34 | #include "path-util.h" | |
35 | #include "load-fragment.h" | |
36 | #include "load-dropin.h" | |
37 | #include "log.h" | |
38 | #include "unit-name.h" | |
39 | #include "dbus-unit.h" | |
40 | #include "special.h" | |
41 | #include "cgroup-util.h" | |
42 | #include "missing.h" | |
663996b3 | 43 | #include "mkdir.h" |
663996b3 | 44 | #include "fileio-label.h" |
f47781d8 | 45 | #include "bus-common-errors.h" |
60f067b4 JS |
46 | #include "dbus.h" |
47 | #include "execute.h" | |
e842803a | 48 | #include "dropin.h" |
e3bff60a MP |
49 | #include "formats-util.h" |
50 | #include "process-util.h" | |
663996b3 MS |
51 | |
52 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
53 | [UNIT_SERVICE] = &service_vtable, | |
663996b3 | 54 | [UNIT_SOCKET] = &socket_vtable, |
60f067b4 | 55 | [UNIT_BUSNAME] = &busname_vtable, |
663996b3 | 56 | [UNIT_TARGET] = &target_vtable, |
60f067b4 | 57 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
663996b3 MS |
58 | [UNIT_DEVICE] = &device_vtable, |
59 | [UNIT_MOUNT] = &mount_vtable, | |
60 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
663996b3 | 61 | [UNIT_SWAP] = &swap_vtable, |
60f067b4 | 62 | [UNIT_TIMER] = &timer_vtable, |
14228c0d MB |
63 | [UNIT_PATH] = &path_vtable, |
64 | [UNIT_SLICE] = &slice_vtable, | |
65 | [UNIT_SCOPE] = &scope_vtable | |
663996b3 MS |
66 | }; |
67 | ||
e3bff60a | 68 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
5eef597e | 69 | |
663996b3 MS |
70 | Unit *unit_new(Manager *m, size_t size) { |
71 | Unit *u; | |
72 | ||
73 | assert(m); | |
74 | assert(size >= sizeof(Unit)); | |
75 | ||
76 | u = malloc0(size); | |
77 | if (!u) | |
78 | return NULL; | |
79 | ||
5eef597e | 80 | u->names = set_new(&string_hash_ops); |
663996b3 MS |
81 | if (!u->names) { |
82 | free(u); | |
83 | return NULL; | |
84 | } | |
85 | ||
86 | u->manager = m; | |
87 | u->type = _UNIT_TYPE_INVALID; | |
663996b3 MS |
88 | u->default_dependencies = true; |
89 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
f47781d8 | 90 | u->unit_file_preset = -1; |
60f067b4 | 91 | u->on_failure_job_mode = JOB_REPLACE; |
663996b3 | 92 | |
e3bff60a MP |
93 | RATELIMIT_INIT(u->auto_stop_ratelimit, 10 * USEC_PER_SEC, 16); |
94 | ||
663996b3 MS |
95 | return u; |
96 | } | |
97 | ||
98 | bool unit_has_name(Unit *u, const char *name) { | |
99 | assert(u); | |
100 | assert(name); | |
101 | ||
102 | return !!set_get(u->names, (char*) name); | |
103 | } | |
104 | ||
60f067b4 JS |
105 | static void unit_init(Unit *u) { |
106 | CGroupContext *cc; | |
107 | ExecContext *ec; | |
108 | KillContext *kc; | |
109 | ||
110 | assert(u); | |
111 | assert(u->manager); | |
112 | assert(u->type >= 0); | |
113 | ||
114 | cc = unit_get_cgroup_context(u); | |
115 | if (cc) { | |
116 | cgroup_context_init(cc); | |
117 | ||
118 | /* Copy in the manager defaults into the cgroup | |
119 | * context, _before_ the rest of the settings have | |
120 | * been initialized */ | |
121 | ||
122 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
123 | cc->blockio_accounting = u->manager->default_blockio_accounting; | |
124 | cc->memory_accounting = u->manager->default_memory_accounting; | |
125 | } | |
126 | ||
127 | ec = unit_get_exec_context(u); | |
128 | if (ec) | |
129 | exec_context_init(ec); | |
130 | ||
131 | kc = unit_get_kill_context(u); | |
132 | if (kc) | |
133 | kill_context_init(kc); | |
134 | ||
135 | if (UNIT_VTABLE(u)->init) | |
136 | UNIT_VTABLE(u)->init(u); | |
137 | } | |
138 | ||
663996b3 | 139 | int unit_add_name(Unit *u, const char *text) { |
60f067b4 | 140 | _cleanup_free_ char *s = NULL, *i = NULL; |
663996b3 | 141 | UnitType t; |
663996b3 MS |
142 | int r; |
143 | ||
144 | assert(u); | |
145 | assert(text); | |
146 | ||
e3bff60a | 147 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
60f067b4 | 148 | |
663996b3 MS |
149 | if (!u->instance) |
150 | return -EINVAL; | |
151 | ||
e3bff60a MP |
152 | r = unit_name_replace_instance(text, u->instance, &s); |
153 | if (r < 0) | |
154 | return r; | |
155 | } else { | |
663996b3 | 156 | s = strdup(text); |
e3bff60a MP |
157 | if (!s) |
158 | return -ENOMEM; | |
159 | } | |
160 | ||
161 | if (set_contains(u->names, s)) | |
162 | return 0; | |
163 | if (hashmap_contains(u->manager->units, s)) | |
164 | return -EEXIST; | |
663996b3 | 165 | |
e3bff60a | 166 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) |
60f067b4 | 167 | return -EINVAL; |
663996b3 | 168 | |
e3bff60a MP |
169 | t = unit_name_to_type(s); |
170 | if (t < 0) | |
171 | return -EINVAL; | |
663996b3 | 172 | |
60f067b4 JS |
173 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
174 | return -EINVAL; | |
663996b3 | 175 | |
60f067b4 JS |
176 | r = unit_name_to_instance(s, &i); |
177 | if (r < 0) | |
178 | return r; | |
663996b3 | 179 | |
60f067b4 JS |
180 | if (i && unit_vtable[t]->no_instances) |
181 | return -EINVAL; | |
663996b3 MS |
182 | |
183 | /* Ensure that this unit is either instanced or not instanced, | |
e3bff60a MP |
184 | * but not both. Note that we do allow names with different |
185 | * instance names however! */ | |
60f067b4 JS |
186 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
187 | return -EINVAL; | |
663996b3 | 188 | |
e3bff60a | 189 | if (unit_vtable[t]->no_alias && !set_isempty(u->names)) |
60f067b4 | 190 | return -EEXIST; |
663996b3 | 191 | |
60f067b4 JS |
192 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
193 | return -E2BIG; | |
663996b3 | 194 | |
60f067b4 | 195 | r = set_put(u->names, s); |
e3bff60a | 196 | if (r < 0) |
60f067b4 | 197 | return r; |
e3bff60a | 198 | assert(r > 0); |
663996b3 | 199 | |
60f067b4 JS |
200 | r = hashmap_put(u->manager->units, s, u); |
201 | if (r < 0) { | |
e3bff60a | 202 | (void) set_remove(u->names, s); |
60f067b4 | 203 | return r; |
663996b3 MS |
204 | } |
205 | ||
206 | if (u->type == _UNIT_TYPE_INVALID) { | |
663996b3 MS |
207 | u->type = t; |
208 | u->id = s; | |
209 | u->instance = i; | |
210 | ||
60f067b4 | 211 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
663996b3 | 212 | |
60f067b4 | 213 | unit_init(u); |
663996b3 | 214 | |
60f067b4 JS |
215 | i = NULL; |
216 | } | |
663996b3 | 217 | |
60f067b4 | 218 | s = NULL; |
663996b3 | 219 | |
60f067b4 JS |
220 | unit_add_to_dbus_queue(u); |
221 | return 0; | |
663996b3 MS |
222 | } |
223 | ||
224 | int unit_choose_id(Unit *u, const char *name) { | |
14228c0d | 225 | _cleanup_free_ char *t = NULL; |
60f067b4 | 226 | char *s, *i; |
663996b3 MS |
227 | int r; |
228 | ||
229 | assert(u); | |
230 | assert(name); | |
231 | ||
e3bff60a | 232 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
663996b3 MS |
233 | |
234 | if (!u->instance) | |
235 | return -EINVAL; | |
236 | ||
e3bff60a MP |
237 | r = unit_name_replace_instance(name, u->instance, &t); |
238 | if (r < 0) | |
239 | return r; | |
663996b3 MS |
240 | |
241 | name = t; | |
242 | } | |
243 | ||
244 | /* Selects one of the names of this unit as the id */ | |
245 | s = set_get(u->names, (char*) name); | |
663996b3 MS |
246 | if (!s) |
247 | return -ENOENT; | |
248 | ||
e3bff60a | 249 | /* Determine the new instance from the new id */ |
60f067b4 JS |
250 | r = unit_name_to_instance(s, &i); |
251 | if (r < 0) | |
663996b3 MS |
252 | return r; |
253 | ||
254 | u->id = s; | |
255 | ||
256 | free(u->instance); | |
257 | u->instance = i; | |
258 | ||
259 | unit_add_to_dbus_queue(u); | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
264 | int unit_set_description(Unit *u, const char *description) { | |
265 | char *s; | |
266 | ||
267 | assert(u); | |
268 | ||
14228c0d MB |
269 | if (isempty(description)) |
270 | s = NULL; | |
271 | else { | |
272 | s = strdup(description); | |
273 | if (!s) | |
274 | return -ENOMEM; | |
275 | } | |
663996b3 MS |
276 | |
277 | free(u->description); | |
278 | u->description = s; | |
279 | ||
280 | unit_add_to_dbus_queue(u); | |
281 | return 0; | |
282 | } | |
283 | ||
284 | bool unit_check_gc(Unit *u) { | |
e735f4d4 | 285 | UnitActiveState state; |
663996b3 MS |
286 | assert(u); |
287 | ||
e735f4d4 | 288 | if (u->job) |
663996b3 MS |
289 | return true; |
290 | ||
e735f4d4 | 291 | if (u->nop_job) |
663996b3 MS |
292 | return true; |
293 | ||
e735f4d4 MP |
294 | state = unit_active_state(u); |
295 | ||
296 | /* If the unit is inactive and failed and no job is queued for | |
297 | * it, then release its runtime resources */ | |
298 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && | |
299 | UNIT_VTABLE(u)->release_resources) | |
300 | UNIT_VTABLE(u)->release_resources(u); | |
301 | ||
302 | /* But we keep the unit object around for longer when it is | |
303 | * referenced or configured to not be gc'ed */ | |
304 | if (state != UNIT_INACTIVE) | |
663996b3 MS |
305 | return true; |
306 | ||
e735f4d4 | 307 | if (UNIT_VTABLE(u)->no_gc) |
663996b3 MS |
308 | return true; |
309 | ||
e735f4d4 | 310 | if (u->no_gc) |
663996b3 MS |
311 | return true; |
312 | ||
313 | if (u->refs) | |
314 | return true; | |
315 | ||
316 | if (UNIT_VTABLE(u)->check_gc) | |
317 | if (UNIT_VTABLE(u)->check_gc(u)) | |
318 | return true; | |
319 | ||
320 | return false; | |
321 | } | |
322 | ||
323 | void unit_add_to_load_queue(Unit *u) { | |
324 | assert(u); | |
325 | assert(u->type != _UNIT_TYPE_INVALID); | |
326 | ||
327 | if (u->load_state != UNIT_STUB || u->in_load_queue) | |
328 | return; | |
329 | ||
60f067b4 | 330 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
663996b3 MS |
331 | u->in_load_queue = true; |
332 | } | |
333 | ||
334 | void unit_add_to_cleanup_queue(Unit *u) { | |
335 | assert(u); | |
336 | ||
337 | if (u->in_cleanup_queue) | |
338 | return; | |
339 | ||
60f067b4 | 340 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
663996b3 MS |
341 | u->in_cleanup_queue = true; |
342 | } | |
343 | ||
344 | void unit_add_to_gc_queue(Unit *u) { | |
345 | assert(u); | |
346 | ||
347 | if (u->in_gc_queue || u->in_cleanup_queue) | |
348 | return; | |
349 | ||
350 | if (unit_check_gc(u)) | |
351 | return; | |
352 | ||
60f067b4 | 353 | LIST_PREPEND(gc_queue, u->manager->gc_queue, u); |
663996b3 MS |
354 | u->in_gc_queue = true; |
355 | ||
356 | u->manager->n_in_gc_queue ++; | |
663996b3 MS |
357 | } |
358 | ||
359 | void unit_add_to_dbus_queue(Unit *u) { | |
360 | assert(u); | |
361 | assert(u->type != _UNIT_TYPE_INVALID); | |
362 | ||
363 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) | |
364 | return; | |
365 | ||
366 | /* Shortcut things if nobody cares */ | |
60f067b4 JS |
367 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
368 | set_isempty(u->manager->private_buses)) { | |
663996b3 MS |
369 | u->sent_dbus_new_signal = true; |
370 | return; | |
371 | } | |
372 | ||
60f067b4 | 373 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
663996b3 MS |
374 | u->in_dbus_queue = true; |
375 | } | |
376 | ||
377 | static void bidi_set_free(Unit *u, Set *s) { | |
378 | Iterator i; | |
379 | Unit *other; | |
380 | ||
381 | assert(u); | |
382 | ||
383 | /* Frees the set and makes sure we are dropped from the | |
384 | * inverse pointers */ | |
385 | ||
386 | SET_FOREACH(other, s, i) { | |
387 | UnitDependency d; | |
388 | ||
389 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
390 | set_remove(other->dependencies[d], u); | |
391 | ||
392 | unit_add_to_gc_queue(other); | |
393 | } | |
394 | ||
395 | set_free(s); | |
396 | } | |
397 | ||
14228c0d MB |
398 | static void unit_remove_transient(Unit *u) { |
399 | char **i; | |
400 | ||
401 | assert(u); | |
402 | ||
403 | if (!u->transient) | |
404 | return; | |
405 | ||
406 | if (u->fragment_path) | |
407 | unlink(u->fragment_path); | |
408 | ||
409 | STRV_FOREACH(i, u->dropin_paths) { | |
410 | _cleanup_free_ char *p = NULL; | |
411 | int r; | |
412 | ||
413 | unlink(*i); | |
414 | ||
415 | r = path_get_parent(*i, &p); | |
416 | if (r >= 0) | |
417 | rmdir(p); | |
418 | } | |
419 | } | |
420 | ||
421 | static void unit_free_requires_mounts_for(Unit *u) { | |
422 | char **j; | |
423 | ||
424 | STRV_FOREACH(j, u->requires_mounts_for) { | |
425 | char s[strlen(*j) + 1]; | |
426 | ||
427 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
428 | char *y; | |
429 | Set *x; | |
430 | ||
431 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
432 | if (!x) | |
433 | continue; | |
434 | ||
435 | set_remove(x, u); | |
436 | ||
437 | if (set_isempty(x)) { | |
438 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
439 | free(y); | |
440 | set_free(x); | |
441 | } | |
442 | } | |
443 | } | |
444 | ||
445 | strv_free(u->requires_mounts_for); | |
446 | u->requires_mounts_for = NULL; | |
447 | } | |
448 | ||
60f067b4 JS |
449 | static void unit_done(Unit *u) { |
450 | ExecContext *ec; | |
451 | CGroupContext *cc; | |
452 | ||
453 | assert(u); | |
454 | ||
455 | if (u->type < 0) | |
456 | return; | |
457 | ||
458 | if (UNIT_VTABLE(u)->done) | |
459 | UNIT_VTABLE(u)->done(u); | |
460 | ||
461 | ec = unit_get_exec_context(u); | |
462 | if (ec) | |
463 | exec_context_done(ec); | |
464 | ||
465 | cc = unit_get_cgroup_context(u); | |
466 | if (cc) | |
467 | cgroup_context_done(cc); | |
468 | } | |
469 | ||
663996b3 MS |
470 | void unit_free(Unit *u) { |
471 | UnitDependency d; | |
472 | Iterator i; | |
473 | char *t; | |
474 | ||
475 | assert(u); | |
476 | ||
14228c0d MB |
477 | if (u->manager->n_reloading <= 0) |
478 | unit_remove_transient(u); | |
479 | ||
663996b3 MS |
480 | bus_unit_send_removed_signal(u); |
481 | ||
60f067b4 | 482 | unit_done(u); |
663996b3 | 483 | |
14228c0d MB |
484 | unit_free_requires_mounts_for(u); |
485 | ||
663996b3 MS |
486 | SET_FOREACH(t, u->names, i) |
487 | hashmap_remove_value(u->manager->units, t, u); | |
488 | ||
489 | if (u->job) { | |
490 | Job *j = u->job; | |
491 | job_uninstall(j); | |
492 | job_free(j); | |
493 | } | |
494 | ||
495 | if (u->nop_job) { | |
496 | Job *j = u->nop_job; | |
497 | job_uninstall(j); | |
498 | job_free(j); | |
499 | } | |
500 | ||
501 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
502 | bidi_set_free(u, u->dependencies[d]); | |
503 | ||
663996b3 | 504 | if (u->type != _UNIT_TYPE_INVALID) |
60f067b4 | 505 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
663996b3 MS |
506 | |
507 | if (u->in_load_queue) | |
60f067b4 | 508 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
663996b3 MS |
509 | |
510 | if (u->in_dbus_queue) | |
60f067b4 | 511 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
663996b3 MS |
512 | |
513 | if (u->in_cleanup_queue) | |
60f067b4 | 514 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
663996b3 MS |
515 | |
516 | if (u->in_gc_queue) { | |
60f067b4 | 517 | LIST_REMOVE(gc_queue, u->manager->gc_queue, u); |
663996b3 MS |
518 | u->manager->n_in_gc_queue--; |
519 | } | |
520 | ||
14228c0d | 521 | if (u->in_cgroup_queue) |
60f067b4 | 522 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
14228c0d MB |
523 | |
524 | if (u->cgroup_path) { | |
525 | hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
526 | free(u->cgroup_path); | |
527 | } | |
663996b3 | 528 | |
e3bff60a | 529 | manager_update_failed_units(u->manager, u, false); |
60f067b4 JS |
530 | set_remove(u->manager->startup_units, u); |
531 | ||
663996b3 MS |
532 | free(u->description); |
533 | strv_free(u->documentation); | |
534 | free(u->fragment_path); | |
535 | free(u->source_path); | |
536 | strv_free(u->dropin_paths); | |
537 | free(u->instance); | |
538 | ||
5eef597e MP |
539 | free(u->job_timeout_reboot_arg); |
540 | ||
663996b3 MS |
541 | set_free_free(u->names); |
542 | ||
60f067b4 JS |
543 | unit_unwatch_all_pids(u); |
544 | ||
663996b3 | 545 | condition_free_list(u->conditions); |
f47781d8 | 546 | condition_free_list(u->asserts); |
663996b3 | 547 | |
14228c0d MB |
548 | unit_ref_unset(&u->slice); |
549 | ||
663996b3 MS |
550 | while (u->refs) |
551 | unit_ref_unset(u->refs); | |
552 | ||
553 | free(u); | |
554 | } | |
555 | ||
556 | UnitActiveState unit_active_state(Unit *u) { | |
557 | assert(u); | |
558 | ||
559 | if (u->load_state == UNIT_MERGED) | |
560 | return unit_active_state(unit_follow_merge(u)); | |
561 | ||
562 | /* After a reload it might happen that a unit is not correctly | |
563 | * loaded but still has a process around. That's why we won't | |
564 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ | |
565 | ||
566 | return UNIT_VTABLE(u)->active_state(u); | |
567 | } | |
568 | ||
569 | const char* unit_sub_state_to_string(Unit *u) { | |
570 | assert(u); | |
571 | ||
572 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
573 | } | |
574 | ||
5eef597e MP |
575 | static int complete_move(Set **s, Set **other) { |
576 | int r; | |
577 | ||
663996b3 MS |
578 | assert(s); |
579 | assert(other); | |
580 | ||
581 | if (!*other) | |
5eef597e | 582 | return 0; |
663996b3 | 583 | |
5eef597e MP |
584 | if (*s) { |
585 | r = set_move(*s, *other); | |
586 | if (r < 0) | |
587 | return r; | |
588 | } else { | |
663996b3 MS |
589 | *s = *other; |
590 | *other = NULL; | |
591 | } | |
5eef597e MP |
592 | |
593 | return 0; | |
663996b3 MS |
594 | } |
595 | ||
5eef597e | 596 | static int merge_names(Unit *u, Unit *other) { |
663996b3 MS |
597 | char *t; |
598 | Iterator i; | |
5eef597e | 599 | int r; |
663996b3 MS |
600 | |
601 | assert(u); | |
602 | assert(other); | |
603 | ||
5eef597e MP |
604 | r = complete_move(&u->names, &other->names); |
605 | if (r < 0) | |
606 | return r; | |
663996b3 MS |
607 | |
608 | set_free_free(other->names); | |
609 | other->names = NULL; | |
610 | other->id = NULL; | |
611 | ||
612 | SET_FOREACH(t, u->names, i) | |
613 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
5eef597e MP |
614 | |
615 | return 0; | |
616 | } | |
617 | ||
618 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { | |
619 | unsigned n_reserve; | |
620 | ||
621 | assert(u); | |
622 | assert(other); | |
623 | assert(d < _UNIT_DEPENDENCY_MAX); | |
624 | ||
625 | /* | |
626 | * If u does not have this dependency set allocated, there is no need | |
e735f4d4 | 627 | * to reserve anything. In that case other's set will be transferred |
5eef597e MP |
628 | * as a whole to u by complete_move(). |
629 | */ | |
630 | if (!u->dependencies[d]) | |
631 | return 0; | |
632 | ||
633 | /* merge_dependencies() will skip a u-on-u dependency */ | |
634 | n_reserve = set_size(other->dependencies[d]) - !!set_get(other->dependencies[d], u); | |
635 | ||
636 | return set_reserve(u->dependencies[d], n_reserve); | |
663996b3 MS |
637 | } |
638 | ||
5eef597e | 639 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
663996b3 MS |
640 | Iterator i; |
641 | Unit *back; | |
642 | int r; | |
643 | ||
644 | assert(u); | |
645 | assert(other); | |
646 | assert(d < _UNIT_DEPENDENCY_MAX); | |
647 | ||
648 | /* Fix backwards pointers */ | |
649 | SET_FOREACH(back, other->dependencies[d], i) { | |
650 | UnitDependency k; | |
651 | ||
60f067b4 | 652 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
5eef597e MP |
653 | /* Do not add dependencies between u and itself */ |
654 | if (back == u) { | |
655 | if (set_remove(back->dependencies[k], other)) | |
e3bff60a | 656 | maybe_warn_about_dependency(u, other_id, k); |
5eef597e MP |
657 | } else { |
658 | r = set_remove_and_put(back->dependencies[k], other, u); | |
659 | if (r == -EEXIST) | |
660 | set_remove(back->dependencies[k], other); | |
661 | else | |
662 | assert(r >= 0 || r == -ENOENT); | |
663 | } | |
60f067b4 | 664 | } |
663996b3 MS |
665 | } |
666 | ||
5eef597e MP |
667 | /* Also do not move dependencies on u to itself */ |
668 | back = set_remove(other->dependencies[d], u); | |
669 | if (back) | |
e3bff60a | 670 | maybe_warn_about_dependency(u, other_id, d); |
5eef597e MP |
671 | |
672 | /* The move cannot fail. The caller must have performed a reservation. */ | |
673 | assert_se(complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); | |
663996b3 MS |
674 | |
675 | set_free(other->dependencies[d]); | |
676 | other->dependencies[d] = NULL; | |
677 | } | |
678 | ||
679 | int unit_merge(Unit *u, Unit *other) { | |
680 | UnitDependency d; | |
5eef597e MP |
681 | const char *other_id = NULL; |
682 | int r; | |
663996b3 MS |
683 | |
684 | assert(u); | |
685 | assert(other); | |
686 | assert(u->manager == other->manager); | |
687 | assert(u->type != _UNIT_TYPE_INVALID); | |
688 | ||
689 | other = unit_follow_merge(other); | |
690 | ||
691 | if (other == u) | |
692 | return 0; | |
693 | ||
694 | if (u->type != other->type) | |
695 | return -EINVAL; | |
696 | ||
697 | if (!u->instance != !other->instance) | |
698 | return -EINVAL; | |
699 | ||
700 | if (other->load_state != UNIT_STUB && | |
14228c0d | 701 | other->load_state != UNIT_NOT_FOUND) |
663996b3 MS |
702 | return -EEXIST; |
703 | ||
704 | if (other->job) | |
705 | return -EEXIST; | |
706 | ||
707 | if (other->nop_job) | |
708 | return -EEXIST; | |
709 | ||
710 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
711 | return -EEXIST; | |
712 | ||
5eef597e MP |
713 | if (other->id) |
714 | other_id = strdupa(other->id); | |
715 | ||
716 | /* Make reservations to ensure merge_dependencies() won't fail */ | |
717 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
718 | r = reserve_dependencies(u, other, d); | |
719 | /* | |
720 | * We don't rollback reservations if we fail. We don't have | |
721 | * a way to undo reservations. A reservation is not a leak. | |
722 | */ | |
723 | if (r < 0) | |
724 | return r; | |
725 | } | |
726 | ||
663996b3 | 727 | /* Merge names */ |
5eef597e MP |
728 | r = merge_names(u, other); |
729 | if (r < 0) | |
730 | return r; | |
663996b3 MS |
731 | |
732 | /* Redirect all references */ | |
733 | while (other->refs) | |
734 | unit_ref_set(other->refs, u); | |
735 | ||
736 | /* Merge dependencies */ | |
737 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
5eef597e | 738 | merge_dependencies(u, other, other_id, d); |
663996b3 MS |
739 | |
740 | other->load_state = UNIT_MERGED; | |
741 | other->merged_into = u; | |
742 | ||
743 | /* If there is still some data attached to the other node, we | |
744 | * don't need it anymore, and can free it. */ | |
745 | if (other->load_state != UNIT_STUB) | |
746 | if (UNIT_VTABLE(other)->done) | |
747 | UNIT_VTABLE(other)->done(other); | |
748 | ||
749 | unit_add_to_dbus_queue(u); | |
750 | unit_add_to_cleanup_queue(other); | |
751 | ||
752 | return 0; | |
753 | } | |
754 | ||
755 | int unit_merge_by_name(Unit *u, const char *name) { | |
756 | Unit *other; | |
757 | int r; | |
14228c0d | 758 | _cleanup_free_ char *s = NULL; |
663996b3 MS |
759 | |
760 | assert(u); | |
761 | assert(name); | |
762 | ||
e3bff60a | 763 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
663996b3 MS |
764 | if (!u->instance) |
765 | return -EINVAL; | |
766 | ||
e3bff60a MP |
767 | r = unit_name_replace_instance(name, u->instance, &s); |
768 | if (r < 0) | |
769 | return r; | |
663996b3 MS |
770 | |
771 | name = s; | |
772 | } | |
773 | ||
14228c0d | 774 | other = manager_get_unit(u->manager, name); |
e3bff60a MP |
775 | if (other) |
776 | return unit_merge(u, other); | |
663996b3 | 777 | |
e3bff60a | 778 | return unit_add_name(u, name); |
663996b3 MS |
779 | } |
780 | ||
781 | Unit* unit_follow_merge(Unit *u) { | |
782 | assert(u); | |
783 | ||
784 | while (u->load_state == UNIT_MERGED) | |
785 | assert_se(u = u->merged_into); | |
786 | ||
787 | return u; | |
788 | } | |
789 | ||
790 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
791 | int r; | |
792 | ||
793 | assert(u); | |
794 | assert(c); | |
795 | ||
60f067b4 JS |
796 | if (c->working_directory) { |
797 | r = unit_require_mounts_for(u, c->working_directory); | |
798 | if (r < 0) | |
799 | return r; | |
800 | } | |
801 | ||
802 | if (c->root_directory) { | |
803 | r = unit_require_mounts_for(u, c->root_directory); | |
804 | if (r < 0) | |
805 | return r; | |
806 | } | |
807 | ||
e3bff60a | 808 | if (u->manager->running_as != MANAGER_SYSTEM) |
60f067b4 JS |
809 | return 0; |
810 | ||
811 | if (c->private_tmp) { | |
812 | r = unit_require_mounts_for(u, "/tmp"); | |
813 | if (r < 0) | |
814 | return r; | |
815 | ||
816 | r = unit_require_mounts_for(u, "/var/tmp"); | |
817 | if (r < 0) | |
818 | return r; | |
819 | } | |
820 | ||
663996b3 MS |
821 | if (c->std_output != EXEC_OUTPUT_KMSG && |
822 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
823 | c->std_output != EXEC_OUTPUT_JOURNAL && | |
824 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && | |
825 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
826 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && | |
827 | c->std_error != EXEC_OUTPUT_KMSG && | |
828 | c->std_error != EXEC_OUTPUT_SYSLOG && | |
829 | c->std_error != EXEC_OUTPUT_JOURNAL && | |
830 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && | |
831 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && | |
832 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) | |
833 | return 0; | |
834 | ||
835 | /* If syslog or kernel logging is requested, make sure our own | |
836 | * logging daemon is run first. */ | |
837 | ||
60f067b4 JS |
838 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); |
839 | if (r < 0) | |
840 | return r; | |
663996b3 MS |
841 | |
842 | return 0; | |
843 | } | |
844 | ||
845 | const char *unit_description(Unit *u) { | |
846 | assert(u); | |
847 | ||
848 | if (u->description) | |
849 | return u->description; | |
850 | ||
851 | return strna(u->id); | |
852 | } | |
853 | ||
854 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
855 | char *t, **j; | |
856 | UnitDependency d; | |
857 | Iterator i; | |
663996b3 MS |
858 | const char *prefix2; |
859 | char | |
860 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
861 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
862 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
863 | timestamp4[FORMAT_TIMESTAMP_MAX], | |
864 | timespan[FORMAT_TIMESPAN_MAX]; | |
865 | Unit *following; | |
60f067b4 JS |
866 | _cleanup_set_free_ Set *following_set = NULL; |
867 | int r; | |
663996b3 MS |
868 | |
869 | assert(u); | |
870 | assert(u->type >= 0); | |
871 | ||
5eef597e | 872 | prefix = strempty(prefix); |
e735f4d4 | 873 | prefix2 = strjoina(prefix, "\t"); |
663996b3 MS |
874 | |
875 | fprintf(f, | |
876 | "%s-> Unit %s:\n" | |
877 | "%s\tDescription: %s\n" | |
878 | "%s\tInstance: %s\n" | |
879 | "%s\tUnit Load State: %s\n" | |
880 | "%s\tUnit Active State: %s\n" | |
881 | "%s\tInactive Exit Timestamp: %s\n" | |
882 | "%s\tActive Enter Timestamp: %s\n" | |
883 | "%s\tActive Exit Timestamp: %s\n" | |
884 | "%s\tInactive Enter Timestamp: %s\n" | |
885 | "%s\tGC Check Good: %s\n" | |
14228c0d MB |
886 | "%s\tNeed Daemon Reload: %s\n" |
887 | "%s\tTransient: %s\n" | |
888 | "%s\tSlice: %s\n" | |
889 | "%s\tCGroup: %s\n" | |
890 | "%s\tCGroup realized: %s\n" | |
60f067b4 JS |
891 | "%s\tCGroup mask: 0x%x\n" |
892 | "%s\tCGroup members mask: 0x%x\n", | |
663996b3 MS |
893 | prefix, u->id, |
894 | prefix, unit_description(u), | |
895 | prefix, strna(u->instance), | |
896 | prefix, unit_load_state_to_string(u->load_state), | |
897 | prefix, unit_active_state_to_string(unit_active_state(u)), | |
898 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), | |
899 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
900 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
901 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
902 | prefix, yes_no(unit_check_gc(u)), | |
14228c0d MB |
903 | prefix, yes_no(unit_need_daemon_reload(u)), |
904 | prefix, yes_no(u->transient), | |
905 | prefix, strna(unit_slice_name(u)), | |
906 | prefix, strna(u->cgroup_path), | |
907 | prefix, yes_no(u->cgroup_realized), | |
60f067b4 JS |
908 | prefix, u->cgroup_realized_mask, |
909 | prefix, u->cgroup_members_mask); | |
663996b3 MS |
910 | |
911 | SET_FOREACH(t, u->names, i) | |
912 | fprintf(f, "%s\tName: %s\n", prefix, t); | |
913 | ||
914 | STRV_FOREACH(j, u->documentation) | |
915 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
916 | ||
60f067b4 JS |
917 | following = unit_following(u); |
918 | if (following) | |
663996b3 MS |
919 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
920 | ||
60f067b4 JS |
921 | r = unit_following_set(u, &following_set); |
922 | if (r >= 0) { | |
923 | Unit *other; | |
924 | ||
925 | SET_FOREACH(other, following_set, i) | |
926 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
927 | } | |
928 | ||
663996b3 MS |
929 | if (u->fragment_path) |
930 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
931 | ||
932 | if (u->source_path) | |
933 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
934 | ||
935 | STRV_FOREACH(j, u->dropin_paths) | |
936 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); | |
937 | ||
938 | if (u->job_timeout > 0) | |
939 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); | |
940 | ||
5eef597e MP |
941 | if (u->job_timeout_action != FAILURE_ACTION_NONE) |
942 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, failure_action_to_string(u->job_timeout_action)); | |
943 | ||
944 | if (u->job_timeout_reboot_arg) | |
945 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
946 | ||
f47781d8 MP |
947 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
948 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
663996b3 MS |
949 | |
950 | if (dual_timestamp_is_set(&u->condition_timestamp)) | |
951 | fprintf(f, | |
952 | "%s\tCondition Timestamp: %s\n" | |
953 | "%s\tCondition Result: %s\n", | |
954 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), | |
955 | prefix, yes_no(u->condition_result)); | |
956 | ||
f47781d8 MP |
957 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
958 | fprintf(f, | |
959 | "%s\tAssert Timestamp: %s\n" | |
960 | "%s\tAssert Result: %s\n", | |
961 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
962 | prefix, yes_no(u->assert_result)); | |
963 | ||
663996b3 MS |
964 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
965 | Unit *other; | |
966 | ||
967 | SET_FOREACH(other, u->dependencies[d], i) | |
968 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
969 | } | |
970 | ||
971 | if (!strv_isempty(u->requires_mounts_for)) { | |
972 | fprintf(f, | |
973 | "%s\tRequiresMountsFor:", prefix); | |
974 | ||
975 | STRV_FOREACH(j, u->requires_mounts_for) | |
976 | fprintf(f, " %s", *j); | |
977 | ||
978 | fputs("\n", f); | |
979 | } | |
980 | ||
981 | if (u->load_state == UNIT_LOADED) { | |
663996b3 MS |
982 | |
983 | fprintf(f, | |
984 | "%s\tStopWhenUnneeded: %s\n" | |
985 | "%s\tRefuseManualStart: %s\n" | |
986 | "%s\tRefuseManualStop: %s\n" | |
987 | "%s\tDefaultDependencies: %s\n" | |
60f067b4 | 988 | "%s\tOnFailureJobMode: %s\n" |
663996b3 MS |
989 | "%s\tIgnoreOnIsolate: %s\n" |
990 | "%s\tIgnoreOnSnapshot: %s\n", | |
991 | prefix, yes_no(u->stop_when_unneeded), | |
992 | prefix, yes_no(u->refuse_manual_start), | |
993 | prefix, yes_no(u->refuse_manual_stop), | |
994 | prefix, yes_no(u->default_dependencies), | |
60f067b4 | 995 | prefix, job_mode_to_string(u->on_failure_job_mode), |
663996b3 MS |
996 | prefix, yes_no(u->ignore_on_isolate), |
997 | prefix, yes_no(u->ignore_on_snapshot)); | |
998 | ||
663996b3 MS |
999 | if (UNIT_VTABLE(u)->dump) |
1000 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
1001 | ||
1002 | } else if (u->load_state == UNIT_MERGED) | |
1003 | fprintf(f, | |
1004 | "%s\tMerged into: %s\n", | |
1005 | prefix, u->merged_into->id); | |
1006 | else if (u->load_state == UNIT_ERROR) | |
1007 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
1008 | ||
1009 | ||
1010 | if (u->job) | |
1011 | job_dump(u->job, f, prefix2); | |
1012 | ||
1013 | if (u->nop_job) | |
1014 | job_dump(u->nop_job, f, prefix2); | |
1015 | ||
663996b3 MS |
1016 | } |
1017 | ||
1018 | /* Common implementation for multiple backends */ | |
1019 | int unit_load_fragment_and_dropin(Unit *u) { | |
1020 | int r; | |
1021 | ||
1022 | assert(u); | |
1023 | ||
60f067b4 | 1024 | /* Load a .{service,socket,...} file */ |
14228c0d MB |
1025 | r = unit_load_fragment(u); |
1026 | if (r < 0) | |
663996b3 MS |
1027 | return r; |
1028 | ||
1029 | if (u->load_state == UNIT_STUB) | |
1030 | return -ENOENT; | |
1031 | ||
1032 | /* Load drop-in directory data */ | |
14228c0d MB |
1033 | r = unit_load_dropin(unit_follow_merge(u)); |
1034 | if (r < 0) | |
663996b3 MS |
1035 | return r; |
1036 | ||
1037 | return 0; | |
1038 | } | |
1039 | ||
1040 | /* Common implementation for multiple backends */ | |
1041 | int unit_load_fragment_and_dropin_optional(Unit *u) { | |
1042 | int r; | |
1043 | ||
1044 | assert(u); | |
1045 | ||
1046 | /* Same as unit_load_fragment_and_dropin(), but whether | |
1047 | * something can be loaded or not doesn't matter. */ | |
1048 | ||
1049 | /* Load a .service file */ | |
14228c0d MB |
1050 | r = unit_load_fragment(u); |
1051 | if (r < 0) | |
663996b3 MS |
1052 | return r; |
1053 | ||
1054 | if (u->load_state == UNIT_STUB) | |
1055 | u->load_state = UNIT_LOADED; | |
1056 | ||
1057 | /* Load drop-in directory data */ | |
14228c0d MB |
1058 | r = unit_load_dropin(unit_follow_merge(u)); |
1059 | if (r < 0) | |
663996b3 MS |
1060 | return r; |
1061 | ||
1062 | return 0; | |
1063 | } | |
1064 | ||
1065 | int unit_add_default_target_dependency(Unit *u, Unit *target) { | |
1066 | assert(u); | |
1067 | assert(target); | |
1068 | ||
1069 | if (target->type != UNIT_TARGET) | |
1070 | return 0; | |
1071 | ||
1072 | /* Only add the dependency if both units are loaded, so that | |
1073 | * that loop check below is reliable */ | |
1074 | if (u->load_state != UNIT_LOADED || | |
1075 | target->load_state != UNIT_LOADED) | |
1076 | return 0; | |
1077 | ||
1078 | /* If either side wants no automatic dependencies, then let's | |
1079 | * skip this */ | |
1080 | if (!u->default_dependencies || | |
1081 | !target->default_dependencies) | |
1082 | return 0; | |
1083 | ||
1084 | /* Don't create loops */ | |
1085 | if (set_get(target->dependencies[UNIT_BEFORE], u)) | |
1086 | return 0; | |
1087 | ||
1088 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
1089 | } | |
1090 | ||
60f067b4 | 1091 | static int unit_add_target_dependencies(Unit *u) { |
14228c0d | 1092 | |
663996b3 MS |
1093 | static const UnitDependency deps[] = { |
1094 | UNIT_REQUIRED_BY, | |
1095 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
e3bff60a MP |
1096 | UNIT_REQUISITE_OF, |
1097 | UNIT_REQUISITE_OF_OVERRIDABLE, | |
663996b3 MS |
1098 | UNIT_WANTED_BY, |
1099 | UNIT_BOUND_BY | |
1100 | }; | |
1101 | ||
1102 | Unit *target; | |
1103 | Iterator i; | |
663996b3 | 1104 | unsigned k; |
60f067b4 | 1105 | int r = 0; |
663996b3 MS |
1106 | |
1107 | assert(u); | |
1108 | ||
1109 | for (k = 0; k < ELEMENTSOF(deps); k++) | |
14228c0d MB |
1110 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
1111 | r = unit_add_default_target_dependency(u, target); | |
1112 | if (r < 0) | |
663996b3 | 1113 | return r; |
14228c0d MB |
1114 | } |
1115 | ||
60f067b4 JS |
1116 | return r; |
1117 | } | |
14228c0d | 1118 | |
60f067b4 JS |
1119 | static int unit_add_slice_dependencies(Unit *u) { |
1120 | assert(u); | |
1121 | ||
1122 | if (!unit_get_cgroup_context(u)) | |
1123 | return 0; | |
1124 | ||
1125 | if (UNIT_ISSET(u->slice)) | |
1126 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true); | |
1127 | ||
5eef597e MP |
1128 | if (streq(u->id, SPECIAL_ROOT_SLICE)) |
1129 | return 0; | |
1130 | ||
60f067b4 JS |
1131 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true); |
1132 | } | |
1133 | ||
1134 | static int unit_add_mount_dependencies(Unit *u) { | |
1135 | char **i; | |
1136 | int r; | |
1137 | ||
1138 | assert(u); | |
1139 | ||
1140 | STRV_FOREACH(i, u->requires_mounts_for) { | |
1141 | char prefix[strlen(*i) + 1]; | |
1142 | ||
1143 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
1144 | Unit *m; | |
1145 | ||
1146 | r = manager_get_unit_by_path(u->manager, prefix, ".mount", &m); | |
1147 | if (r < 0) | |
1148 | return r; | |
1149 | if (r == 0) | |
1150 | continue; | |
1151 | if (m == u) | |
1152 | continue; | |
1153 | ||
1154 | if (m->load_state != UNIT_LOADED) | |
1155 | continue; | |
1156 | ||
1157 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1158 | if (r < 0) | |
1159 | return r; | |
1160 | ||
1161 | if (m->fragment_path) { | |
1162 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1163 | if (r < 0) | |
1164 | return r; | |
1165 | } | |
1166 | } | |
14228c0d | 1167 | } |
663996b3 MS |
1168 | |
1169 | return 0; | |
1170 | } | |
1171 | ||
60f067b4 JS |
1172 | static int unit_add_startup_units(Unit *u) { |
1173 | CGroupContext *c; | |
60f067b4 JS |
1174 | |
1175 | c = unit_get_cgroup_context(u); | |
1176 | if (!c) | |
1177 | return 0; | |
1178 | ||
1179 | if (c->startup_cpu_shares == (unsigned long) -1 && | |
1180 | c->startup_blockio_weight == (unsigned long) -1) | |
1181 | return 0; | |
1182 | ||
e3bff60a | 1183 | return set_put(u->manager->startup_units, u); |
60f067b4 JS |
1184 | } |
1185 | ||
663996b3 MS |
1186 | int unit_load(Unit *u) { |
1187 | int r; | |
1188 | ||
1189 | assert(u); | |
1190 | ||
1191 | if (u->in_load_queue) { | |
60f067b4 | 1192 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
663996b3 MS |
1193 | u->in_load_queue = false; |
1194 | } | |
1195 | ||
1196 | if (u->type == _UNIT_TYPE_INVALID) | |
1197 | return -EINVAL; | |
1198 | ||
1199 | if (u->load_state != UNIT_STUB) | |
1200 | return 0; | |
1201 | ||
14228c0d MB |
1202 | if (UNIT_VTABLE(u)->load) { |
1203 | r = UNIT_VTABLE(u)->load(u); | |
1204 | if (r < 0) | |
663996b3 | 1205 | goto fail; |
14228c0d | 1206 | } |
663996b3 MS |
1207 | |
1208 | if (u->load_state == UNIT_STUB) { | |
1209 | r = -ENOENT; | |
1210 | goto fail; | |
1211 | } | |
1212 | ||
663996b3 | 1213 | if (u->load_state == UNIT_LOADED) { |
14228c0d | 1214 | |
60f067b4 JS |
1215 | r = unit_add_target_dependencies(u); |
1216 | if (r < 0) | |
1217 | goto fail; | |
14228c0d | 1218 | |
60f067b4 | 1219 | r = unit_add_slice_dependencies(u); |
663996b3 | 1220 | if (r < 0) |
14228c0d | 1221 | goto fail; |
663996b3 | 1222 | |
60f067b4 JS |
1223 | r = unit_add_mount_dependencies(u); |
1224 | if (r < 0) | |
1225 | goto fail; | |
663996b3 | 1226 | |
60f067b4 JS |
1227 | r = unit_add_startup_units(u); |
1228 | if (r < 0) | |
1229 | goto fail; | |
663996b3 | 1230 | |
60f067b4 | 1231 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
e3bff60a | 1232 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
14228c0d MB |
1233 | r = -EINVAL; |
1234 | goto fail; | |
1235 | } | |
60f067b4 JS |
1236 | |
1237 | unit_update_cgroup_members_masks(u); | |
663996b3 MS |
1238 | } |
1239 | ||
1240 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); | |
1241 | ||
1242 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
1243 | unit_add_to_gc_queue(u); | |
1244 | ||
1245 | return 0; | |
1246 | ||
1247 | fail: | |
14228c0d | 1248 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
663996b3 MS |
1249 | u->load_error = r; |
1250 | unit_add_to_dbus_queue(u); | |
1251 | unit_add_to_gc_queue(u); | |
1252 | ||
e3bff60a | 1253 | log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
663996b3 MS |
1254 | |
1255 | return r; | |
1256 | } | |
1257 | ||
f47781d8 MP |
1258 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1259 | Condition *c; | |
1260 | int triggered = -1; | |
1261 | ||
1262 | assert(u); | |
1263 | assert(to_string); | |
1264 | ||
1265 | /* If the condition list is empty, then it is true */ | |
1266 | if (!first) | |
1267 | return true; | |
1268 | ||
1269 | /* Otherwise, if all of the non-trigger conditions apply and | |
1270 | * if any of the trigger conditions apply (unless there are | |
1271 | * none) we return true */ | |
1272 | LIST_FOREACH(conditions, c, first) { | |
1273 | int r; | |
1274 | ||
1275 | r = condition_test(c); | |
1276 | if (r < 0) | |
e3bff60a MP |
1277 | log_unit_warning(u, |
1278 | "Couldn't determine result for %s=%s%s%s, assuming failed: %m", | |
f47781d8 MP |
1279 | to_string(c->type), |
1280 | c->trigger ? "|" : "", | |
1281 | c->negate ? "!" : "", | |
e3bff60a | 1282 | c->parameter); |
f47781d8 | 1283 | else |
e3bff60a MP |
1284 | log_unit_debug(u, |
1285 | "%s=%s%s%s %s.", | |
f47781d8 MP |
1286 | to_string(c->type), |
1287 | c->trigger ? "|" : "", | |
1288 | c->negate ? "!" : "", | |
1289 | c->parameter, | |
e3bff60a | 1290 | condition_result_to_string(c->result)); |
f47781d8 MP |
1291 | |
1292 | if (!c->trigger && r <= 0) | |
1293 | return false; | |
1294 | ||
1295 | if (c->trigger && triggered <= 0) | |
1296 | triggered = r > 0; | |
1297 | } | |
1298 | ||
1299 | return triggered != 0; | |
1300 | } | |
1301 | ||
60f067b4 | 1302 | static bool unit_condition_test(Unit *u) { |
663996b3 MS |
1303 | assert(u); |
1304 | ||
1305 | dual_timestamp_get(&u->condition_timestamp); | |
f47781d8 | 1306 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
663996b3 MS |
1307 | |
1308 | return u->condition_result; | |
1309 | } | |
1310 | ||
f47781d8 MP |
1311 | static bool unit_assert_test(Unit *u) { |
1312 | assert(u); | |
1313 | ||
1314 | dual_timestamp_get(&u->assert_timestamp); | |
1315 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); | |
1316 | ||
1317 | return u->assert_result; | |
1318 | } | |
1319 | ||
663996b3 MS |
1320 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
1321 | const UnitStatusMessageFormats *format_table; | |
1322 | ||
1323 | assert(u); | |
1324 | assert(t >= 0); | |
1325 | assert(t < _JOB_TYPE_MAX); | |
1326 | ||
1327 | if (t != JOB_START && t != JOB_STOP) | |
1328 | return NULL; | |
1329 | ||
1330 | format_table = &UNIT_VTABLE(u)->status_message_formats; | |
1331 | if (!format_table) | |
1332 | return NULL; | |
1333 | ||
1334 | return format_table->starting_stopping[t == JOB_STOP]; | |
1335 | } | |
1336 | ||
1337 | _pure_ static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) { | |
1338 | const char *format; | |
1339 | ||
1340 | assert(u); | |
1341 | assert(t >= 0); | |
1342 | assert(t < _JOB_TYPE_MAX); | |
1343 | ||
1344 | format = unit_get_status_message_format(u, t); | |
1345 | if (format) | |
1346 | return format; | |
1347 | ||
1348 | /* Return generic strings */ | |
1349 | if (t == JOB_START) | |
1350 | return "Starting %s."; | |
1351 | else if (t == JOB_STOP) | |
1352 | return "Stopping %s."; | |
1353 | else if (t == JOB_RELOAD) | |
1354 | return "Reloading %s."; | |
1355 | ||
1356 | return NULL; | |
1357 | } | |
1358 | ||
1359 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1360 | const char *format; | |
1361 | ||
1362 | assert(u); | |
1363 | ||
1364 | /* We only print status messages for selected units on | |
1365 | * selected operations. */ | |
1366 | ||
1367 | format = unit_get_status_message_format(u, t); | |
1368 | if (!format) | |
1369 | return; | |
1370 | ||
60f067b4 | 1371 | DISABLE_WARNING_FORMAT_NONLITERAL; |
663996b3 | 1372 | unit_status_printf(u, "", format); |
60f067b4 | 1373 | REENABLE_WARNING; |
663996b3 MS |
1374 | } |
1375 | ||
663996b3 MS |
1376 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
1377 | const char *format; | |
1378 | char buf[LINE_MAX]; | |
1379 | sd_id128_t mid; | |
1380 | ||
1381 | assert(u); | |
1382 | ||
1383 | if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD) | |
1384 | return; | |
1385 | ||
1386 | if (log_on_console()) | |
1387 | return; | |
1388 | ||
1389 | /* We log status messages for all units and all operations. */ | |
1390 | ||
1391 | format = unit_get_status_message_format_try_harder(u, t); | |
1392 | if (!format) | |
1393 | return; | |
1394 | ||
60f067b4 | 1395 | DISABLE_WARNING_FORMAT_NONLITERAL; |
663996b3 | 1396 | snprintf(buf, sizeof(buf), format, unit_description(u)); |
60f067b4 | 1397 | REENABLE_WARNING; |
663996b3 MS |
1398 | |
1399 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1400 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1401 | SD_MESSAGE_UNIT_RELOADING; | |
1402 | ||
e3bff60a MP |
1403 | /* Note that we deliberately use LOG_MESSAGE() instead of |
1404 | * LOG_UNIT_MESSAGE() here, since this is supposed to mimic | |
1405 | * closely what is written to screen using the status output, | |
1406 | * which is supposed the highest level, friendliest output | |
1407 | * possible, which means we should avoid the low-level unit | |
1408 | * name. */ | |
1409 | log_struct(LOG_INFO, | |
1410 | LOG_MESSAGE_ID(mid), | |
1411 | LOG_UNIT_ID(u), | |
1412 | LOG_MESSAGE("%s", buf), | |
1413 | NULL); | |
663996b3 | 1414 | } |
663996b3 MS |
1415 | |
1416 | /* Errors: | |
1417 | * -EBADR: This unit type does not support starting. | |
1418 | * -EALREADY: Unit is already started. | |
1419 | * -EAGAIN: An operation is already in progress. Retry later. | |
1420 | * -ECANCELED: Too many requests for now. | |
f47781d8 | 1421 | * -EPROTO: Assert failed |
663996b3 MS |
1422 | */ |
1423 | int unit_start(Unit *u) { | |
1424 | UnitActiveState state; | |
1425 | Unit *following; | |
e735f4d4 | 1426 | int r; |
663996b3 MS |
1427 | |
1428 | assert(u); | |
1429 | ||
1430 | if (u->load_state != UNIT_LOADED) | |
1431 | return -EINVAL; | |
1432 | ||
1433 | /* If this is already started, then this will succeed. Note | |
1434 | * that this will even succeed if this unit is not startable | |
1435 | * by the user. This is relied on to detect when we need to | |
1436 | * wait for units and when waiting is finished. */ | |
1437 | state = unit_active_state(u); | |
1438 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1439 | return -EALREADY; | |
1440 | ||
1441 | /* If the conditions failed, don't do anything at all. If we | |
1442 | * already are activating this call might still be useful to | |
1443 | * speed up activation in case there is some hold-off time, | |
1444 | * but we don't want to recheck the condition in that case. */ | |
1445 | if (state != UNIT_ACTIVATING && | |
1446 | !unit_condition_test(u)) { | |
e3bff60a | 1447 | log_unit_debug(u, "Starting requested but condition failed. Not starting unit."); |
663996b3 MS |
1448 | return -EALREADY; |
1449 | } | |
1450 | ||
f47781d8 MP |
1451 | /* If the asserts failed, fail the entire job */ |
1452 | if (state != UNIT_ACTIVATING && | |
1453 | !unit_assert_test(u)) { | |
e3bff60a | 1454 | log_unit_notice(u, "Starting requested but asserts failed."); |
f47781d8 MP |
1455 | return -EPROTO; |
1456 | } | |
1457 | ||
663996b3 | 1458 | /* Forward to the main object, if we aren't it. */ |
14228c0d MB |
1459 | following = unit_following(u); |
1460 | if (following) { | |
e3bff60a | 1461 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
663996b3 MS |
1462 | return unit_start(following); |
1463 | } | |
1464 | ||
e3bff60a MP |
1465 | if (!unit_supported(u)) |
1466 | return -EOPNOTSUPP; | |
663996b3 MS |
1467 | |
1468 | /* If it is stopped, but we cannot start it, then fail */ | |
1469 | if (!UNIT_VTABLE(u)->start) | |
1470 | return -EBADR; | |
1471 | ||
1472 | /* We don't suppress calls to ->start() here when we are | |
1473 | * already starting, to allow this request to be used as a | |
1474 | * "hurry up" call, for example when the unit is in some "auto | |
1475 | * restart" state where it waits for a holdoff timer to elapse | |
1476 | * before it will start again. */ | |
1477 | ||
1478 | unit_add_to_dbus_queue(u); | |
1479 | ||
e735f4d4 MP |
1480 | r = UNIT_VTABLE(u)->start(u); |
1481 | if (r <= 0) | |
1482 | return r; | |
1483 | ||
1484 | /* Log if the start function actually did something */ | |
1485 | unit_status_log_starting_stopping_reloading(u, JOB_START); | |
1486 | unit_status_print_starting_stopping(u, JOB_START); | |
1487 | return r; | |
663996b3 MS |
1488 | } |
1489 | ||
1490 | bool unit_can_start(Unit *u) { | |
1491 | assert(u); | |
1492 | ||
1493 | return !!UNIT_VTABLE(u)->start; | |
1494 | } | |
1495 | ||
1496 | bool unit_can_isolate(Unit *u) { | |
1497 | assert(u); | |
1498 | ||
1499 | return unit_can_start(u) && | |
1500 | u->allow_isolate; | |
1501 | } | |
1502 | ||
1503 | /* Errors: | |
1504 | * -EBADR: This unit type does not support stopping. | |
1505 | * -EALREADY: Unit is already stopped. | |
1506 | * -EAGAIN: An operation is already in progress. Retry later. | |
1507 | */ | |
1508 | int unit_stop(Unit *u) { | |
1509 | UnitActiveState state; | |
1510 | Unit *following; | |
e735f4d4 | 1511 | int r; |
663996b3 MS |
1512 | |
1513 | assert(u); | |
1514 | ||
1515 | state = unit_active_state(u); | |
1516 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
1517 | return -EALREADY; | |
1518 | ||
e735f4d4 MP |
1519 | following = unit_following(u); |
1520 | if (following) { | |
e3bff60a | 1521 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
663996b3 MS |
1522 | return unit_stop(following); |
1523 | } | |
1524 | ||
663996b3 MS |
1525 | if (!UNIT_VTABLE(u)->stop) |
1526 | return -EBADR; | |
1527 | ||
1528 | unit_add_to_dbus_queue(u); | |
1529 | ||
e735f4d4 MP |
1530 | r = UNIT_VTABLE(u)->stop(u); |
1531 | if (r <= 0) | |
1532 | return r; | |
1533 | ||
1534 | unit_status_log_starting_stopping_reloading(u, JOB_STOP); | |
1535 | unit_status_print_starting_stopping(u, JOB_STOP); | |
1536 | return r; | |
663996b3 MS |
1537 | } |
1538 | ||
1539 | /* Errors: | |
1540 | * -EBADR: This unit type does not support reloading. | |
1541 | * -ENOEXEC: Unit is not started. | |
1542 | * -EAGAIN: An operation is already in progress. Retry later. | |
1543 | */ | |
1544 | int unit_reload(Unit *u) { | |
1545 | UnitActiveState state; | |
1546 | Unit *following; | |
e735f4d4 | 1547 | int r; |
663996b3 MS |
1548 | |
1549 | assert(u); | |
1550 | ||
1551 | if (u->load_state != UNIT_LOADED) | |
1552 | return -EINVAL; | |
1553 | ||
1554 | if (!unit_can_reload(u)) | |
1555 | return -EBADR; | |
1556 | ||
1557 | state = unit_active_state(u); | |
1558 | if (state == UNIT_RELOADING) | |
1559 | return -EALREADY; | |
1560 | ||
60f067b4 | 1561 | if (state != UNIT_ACTIVE) { |
e3bff60a | 1562 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
663996b3 | 1563 | return -ENOEXEC; |
60f067b4 | 1564 | } |
663996b3 | 1565 | |
60f067b4 JS |
1566 | following = unit_following(u); |
1567 | if (following) { | |
e3bff60a | 1568 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
663996b3 MS |
1569 | return unit_reload(following); |
1570 | } | |
1571 | ||
663996b3 | 1572 | unit_add_to_dbus_queue(u); |
e735f4d4 MP |
1573 | |
1574 | r = UNIT_VTABLE(u)->reload(u); | |
1575 | if (r <= 0) | |
1576 | return r; | |
1577 | ||
1578 | unit_status_log_starting_stopping_reloading(u, JOB_RELOAD); | |
1579 | return r; | |
663996b3 MS |
1580 | } |
1581 | ||
1582 | bool unit_can_reload(Unit *u) { | |
1583 | assert(u); | |
1584 | ||
1585 | if (!UNIT_VTABLE(u)->reload) | |
1586 | return false; | |
1587 | ||
1588 | if (!UNIT_VTABLE(u)->can_reload) | |
1589 | return true; | |
1590 | ||
1591 | return UNIT_VTABLE(u)->can_reload(u); | |
1592 | } | |
1593 | ||
1594 | static void unit_check_unneeded(Unit *u) { | |
e3bff60a MP |
1595 | |
1596 | static const UnitDependency needed_dependencies[] = { | |
1597 | UNIT_REQUIRED_BY, | |
1598 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
1599 | UNIT_REQUISITE, | |
1600 | UNIT_REQUISITE_OF_OVERRIDABLE, | |
1601 | UNIT_WANTED_BY, | |
1602 | UNIT_BOUND_BY, | |
1603 | }; | |
1604 | ||
663996b3 | 1605 | Unit *other; |
e3bff60a MP |
1606 | Iterator i; |
1607 | unsigned j; | |
1608 | int r; | |
663996b3 MS |
1609 | |
1610 | assert(u); | |
1611 | ||
1612 | /* If this service shall be shut down when unneeded then do | |
1613 | * so. */ | |
1614 | ||
1615 | if (!u->stop_when_unneeded) | |
1616 | return; | |
1617 | ||
1618 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1619 | return; | |
1620 | ||
e3bff60a MP |
1621 | for (j = 0; j < ELEMENTSOF(needed_dependencies); j++) |
1622 | SET_FOREACH(other, u->dependencies[needed_dependencies[j]], i) | |
1623 | if (unit_active_or_pending(other)) | |
1624 | return; | |
663996b3 | 1625 | |
e3bff60a MP |
1626 | /* If stopping a unit fails continously we might enter a stop |
1627 | * loop here, hence stop acting on the service being | |
1628 | * unnecessary after a while. */ | |
1629 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { | |
1630 | log_unit_warning(u, "Unit not needed anymore, but not stopping since we tried this too often recently."); | |
1631 | return; | |
1632 | } | |
663996b3 | 1633 | |
e3bff60a | 1634 | log_unit_info(u, "Unit not needed anymore. Stopping."); |
663996b3 MS |
1635 | |
1636 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
e3bff60a MP |
1637 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
1638 | if (r < 0) | |
1639 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %m"); | |
663996b3 MS |
1640 | } |
1641 | ||
5eef597e MP |
1642 | static void unit_check_binds_to(Unit *u) { |
1643 | bool stop = false; | |
1644 | Unit *other; | |
1645 | Iterator i; | |
e3bff60a | 1646 | int r; |
5eef597e MP |
1647 | |
1648 | assert(u); | |
1649 | ||
1650 | if (u->job) | |
1651 | return; | |
1652 | ||
1653 | if (unit_active_state(u) != UNIT_ACTIVE) | |
1654 | return; | |
1655 | ||
1656 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) { | |
1657 | if (other->job) | |
1658 | continue; | |
1659 | ||
1660 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1661 | continue; | |
1662 | ||
1663 | stop = true; | |
e3bff60a | 1664 | break; |
5eef597e MP |
1665 | } |
1666 | ||
1667 | if (!stop) | |
1668 | return; | |
1669 | ||
e3bff60a MP |
1670 | /* If stopping a unit fails continously we might enter a stop |
1671 | * loop here, hence stop acting on the service being | |
1672 | * unnecessary after a while. */ | |
1673 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { | |
1674 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); | |
1675 | return; | |
1676 | } | |
1677 | ||
1678 | assert(other); | |
1679 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); | |
5eef597e MP |
1680 | |
1681 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
e3bff60a MP |
1682 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
1683 | if (r < 0) | |
1684 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %m"); | |
5eef597e MP |
1685 | } |
1686 | ||
663996b3 MS |
1687 | static void retroactively_start_dependencies(Unit *u) { |
1688 | Iterator i; | |
1689 | Unit *other; | |
1690 | ||
1691 | assert(u); | |
1692 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1693 | ||
1694 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) | |
1695 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
1696 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
1697 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); | |
1698 | ||
1699 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) | |
1700 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
1701 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
1702 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); | |
1703 | ||
1704 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) | |
1705 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
1706 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
1707 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); | |
1708 | ||
1709 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) | |
1710 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
1711 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
1712 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); | |
1713 | ||
1714 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) | |
1715 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1716 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); | |
1717 | ||
1718 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) | |
1719 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1720 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); | |
1721 | } | |
1722 | ||
1723 | static void retroactively_stop_dependencies(Unit *u) { | |
1724 | Iterator i; | |
1725 | Unit *other; | |
1726 | ||
1727 | assert(u); | |
1728 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1729 | ||
1730 | /* Pull down units which are bound to us recursively if enabled */ | |
1731 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) | |
1732 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1733 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); | |
1734 | } | |
1735 | ||
1736 | static void check_unneeded_dependencies(Unit *u) { | |
1737 | Iterator i; | |
1738 | Unit *other; | |
1739 | ||
1740 | assert(u); | |
1741 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1742 | ||
1743 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
1744 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) | |
1745 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1746 | unit_check_unneeded(other); | |
1747 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) | |
1748 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1749 | unit_check_unneeded(other); | |
1750 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) | |
1751 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1752 | unit_check_unneeded(other); | |
1753 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) | |
1754 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1755 | unit_check_unneeded(other); | |
1756 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) | |
1757 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1758 | unit_check_unneeded(other); | |
1759 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) | |
1760 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1761 | unit_check_unneeded(other); | |
1762 | } | |
1763 | ||
1764 | void unit_start_on_failure(Unit *u) { | |
1765 | Unit *other; | |
1766 | Iterator i; | |
1767 | ||
1768 | assert(u); | |
1769 | ||
1770 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) | |
1771 | return; | |
1772 | ||
e3bff60a | 1773 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
663996b3 MS |
1774 | |
1775 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { | |
1776 | int r; | |
1777 | ||
60f067b4 | 1778 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, true, NULL, NULL); |
663996b3 | 1779 | if (r < 0) |
e3bff60a | 1780 | log_unit_error_errno(u, r, "Failed to enqueue OnFailure= job: %m"); |
663996b3 MS |
1781 | } |
1782 | } | |
1783 | ||
1784 | void unit_trigger_notify(Unit *u) { | |
1785 | Unit *other; | |
1786 | Iterator i; | |
1787 | ||
1788 | assert(u); | |
1789 | ||
1790 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1791 | if (UNIT_VTABLE(other)->trigger_notify) | |
1792 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1793 | } | |
1794 | ||
1795 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { | |
1796 | Manager *m; | |
1797 | bool unexpected; | |
1798 | ||
1799 | assert(u); | |
1800 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1801 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
1802 | ||
1803 | /* Note that this is called for all low-level state changes, | |
1804 | * even if they might map to the same high-level | |
60f067b4 | 1805 | * UnitActiveState! That means that ns == os is an expected |
663996b3 MS |
1806 | * behavior here. For example: if a mount point is remounted |
1807 | * this function will be called too! */ | |
1808 | ||
1809 | m = u->manager; | |
1810 | ||
60f067b4 | 1811 | /* Update timestamps for state changes */ |
663996b3 MS |
1812 | if (m->n_reloading <= 0) { |
1813 | dual_timestamp ts; | |
1814 | ||
1815 | dual_timestamp_get(&ts); | |
1816 | ||
1817 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
1818 | u->inactive_exit_timestamp = ts; | |
1819 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
1820 | u->inactive_enter_timestamp = ts; | |
1821 | ||
1822 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
1823 | u->active_enter_timestamp = ts; | |
1824 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
1825 | u->active_exit_timestamp = ts; | |
1826 | } | |
1827 | ||
60f067b4 | 1828 | /* Keep track of failed units */ |
e3bff60a | 1829 | manager_update_failed_units(u->manager, u, ns == UNIT_FAILED); |
60f067b4 JS |
1830 | |
1831 | /* Make sure the cgroup is always removed when we become inactive */ | |
663996b3 | 1832 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
f47781d8 | 1833 | unit_destroy_cgroup_if_empty(u); |
663996b3 | 1834 | |
60f067b4 JS |
1835 | /* Note that this doesn't apply to RemainAfterExit services exiting |
1836 | * successfully, since there's no change of state in that case. Which is | |
1837 | * why it is handled in service_set_state() */ | |
663996b3 | 1838 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
60f067b4 JS |
1839 | ExecContext *ec; |
1840 | ||
1841 | ec = unit_get_exec_context(u); | |
663996b3 | 1842 | if (ec && exec_context_may_touch_console(ec)) { |
14228c0d MB |
1843 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
1844 | m->n_on_console --; | |
1845 | ||
1846 | if (m->n_on_console == 0) | |
1847 | /* unset no_console_output flag, since the console is free */ | |
60f067b4 | 1848 | m->no_console_output = false; |
14228c0d MB |
1849 | } else |
1850 | m->n_on_console ++; | |
663996b3 MS |
1851 | } |
1852 | } | |
1853 | ||
1854 | if (u->job) { | |
1855 | unexpected = false; | |
1856 | ||
1857 | if (u->job->state == JOB_WAITING) | |
1858 | ||
1859 | /* So we reached a different state for this | |
1860 | * job. Let's see if we can run it now if it | |
1861 | * failed previously due to EAGAIN. */ | |
1862 | job_add_to_run_queue(u->job); | |
1863 | ||
1864 | /* Let's check whether this state change constitutes a | |
1865 | * finished job, or maybe contradicts a running job and | |
1866 | * hence needs to invalidate jobs. */ | |
1867 | ||
1868 | switch (u->job->type) { | |
1869 | ||
1870 | case JOB_START: | |
1871 | case JOB_VERIFY_ACTIVE: | |
1872 | ||
1873 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
1874 | job_finish_and_invalidate(u->job, JOB_DONE, true); | |
1875 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
1876 | unexpected = true; | |
1877 | ||
1878 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
1879 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); | |
1880 | } | |
1881 | ||
1882 | break; | |
1883 | ||
1884 | case JOB_RELOAD: | |
1885 | case JOB_RELOAD_OR_START: | |
1886 | ||
1887 | if (u->job->state == JOB_RUNNING) { | |
1888 | if (ns == UNIT_ACTIVE) | |
1889 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); | |
1890 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { | |
1891 | unexpected = true; | |
1892 | ||
1893 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
1894 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); | |
1895 | } | |
1896 | } | |
1897 | ||
1898 | break; | |
1899 | ||
1900 | case JOB_STOP: | |
1901 | case JOB_RESTART: | |
1902 | case JOB_TRY_RESTART: | |
1903 | ||
1904 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
1905 | job_finish_and_invalidate(u->job, JOB_DONE, true); | |
1906 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
1907 | unexpected = true; | |
1908 | job_finish_and_invalidate(u->job, JOB_FAILED, true); | |
1909 | } | |
1910 | ||
1911 | break; | |
1912 | ||
1913 | default: | |
1914 | assert_not_reached("Job type unknown"); | |
1915 | } | |
1916 | ||
1917 | } else | |
1918 | unexpected = true; | |
1919 | ||
1920 | if (m->n_reloading <= 0) { | |
1921 | ||
1922 | /* If this state change happened without being | |
1923 | * requested by a job, then let's retroactively start | |
1924 | * or stop dependencies. We skip that step when | |
1925 | * deserializing, since we don't want to create any | |
1926 | * additional jobs just because something is already | |
1927 | * activated. */ | |
1928 | ||
1929 | if (unexpected) { | |
1930 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1931 | retroactively_start_dependencies(u); | |
1932 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1933 | retroactively_stop_dependencies(u); | |
1934 | } | |
1935 | ||
1936 | /* stop unneeded units regardless if going down was expected or not */ | |
60f067b4 | 1937 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
663996b3 MS |
1938 | check_unneeded_dependencies(u); |
1939 | ||
1940 | if (ns != os && ns == UNIT_FAILED) { | |
e3bff60a | 1941 | log_unit_notice(u, "Unit entered failed state."); |
663996b3 MS |
1942 | unit_start_on_failure(u); |
1943 | } | |
1944 | } | |
1945 | ||
1946 | /* Some names are special */ | |
1947 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1948 | ||
1949 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
60f067b4 | 1950 | /* The bus might have just become available, |
663996b3 MS |
1951 | * hence try to connect to it, if we aren't |
1952 | * yet connected. */ | |
1953 | bus_init(m, true); | |
1954 | ||
1955 | if (u->type == UNIT_SERVICE && | |
1956 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && | |
1957 | m->n_reloading <= 0) { | |
1958 | /* Write audit record if we have just finished starting up */ | |
1959 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); | |
1960 | u->in_audit = true; | |
1961 | } | |
1962 | ||
1963 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) | |
1964 | manager_send_unit_plymouth(m, u); | |
1965 | ||
1966 | } else { | |
1967 | ||
1968 | /* We don't care about D-Bus here, since we'll get an | |
1969 | * asynchronous notification for it anyway. */ | |
1970 | ||
1971 | if (u->type == UNIT_SERVICE && | |
1972 | UNIT_IS_INACTIVE_OR_FAILED(ns) && | |
1973 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
1974 | m->n_reloading <= 0) { | |
1975 | ||
1976 | /* Hmm, if there was no start record written | |
1977 | * write it now, so that we always have a nice | |
1978 | * pair */ | |
1979 | if (!u->in_audit) { | |
1980 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); | |
1981 | ||
1982 | if (ns == UNIT_INACTIVE) | |
1983 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); | |
1984 | } else | |
1985 | /* Write audit record if we have just finished shutting down */ | |
1986 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); | |
1987 | ||
1988 | u->in_audit = false; | |
1989 | } | |
1990 | } | |
1991 | ||
1992 | manager_recheck_journal(m); | |
1993 | unit_trigger_notify(u); | |
1994 | ||
5eef597e MP |
1995 | if (u->manager->n_reloading <= 0) { |
1996 | /* Maybe we finished startup and are now ready for | |
1997 | * being stopped because unneeded? */ | |
663996b3 MS |
1998 | unit_check_unneeded(u); |
1999 | ||
5eef597e MP |
2000 | /* Maybe we finished startup, but something we needed |
2001 | * has vanished? Let's die then. (This happens when | |
2002 | * something BindsTo= to a Type=oneshot unit, as these | |
2003 | * units go directly from starting to inactive, | |
2004 | * without ever entering started.) */ | |
2005 | unit_check_binds_to(u); | |
2006 | } | |
2007 | ||
663996b3 MS |
2008 | unit_add_to_dbus_queue(u); |
2009 | unit_add_to_gc_queue(u); | |
2010 | } | |
2011 | ||
60f067b4 JS |
2012 | int unit_watch_pid(Unit *u, pid_t pid) { |
2013 | int q, r; | |
663996b3 MS |
2014 | |
2015 | assert(u); | |
60f067b4 | 2016 | assert(pid >= 1); |
663996b3 | 2017 | |
60f067b4 JS |
2018 | /* Watch a specific PID. We only support one or two units |
2019 | * watching each PID for now, not more. */ | |
663996b3 | 2020 | |
5eef597e | 2021 | r = set_ensure_allocated(&u->pids, NULL); |
60f067b4 JS |
2022 | if (r < 0) |
2023 | return r; | |
663996b3 | 2024 | |
5eef597e | 2025 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL); |
60f067b4 JS |
2026 | if (r < 0) |
2027 | return r; | |
663996b3 | 2028 | |
60f067b4 JS |
2029 | r = hashmap_put(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
2030 | if (r == -EEXIST) { | |
5eef597e | 2031 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL); |
60f067b4 JS |
2032 | if (r < 0) |
2033 | return r; | |
663996b3 | 2034 | |
60f067b4 JS |
2035 | r = hashmap_put(u->manager->watch_pids2, LONG_TO_PTR(pid), u); |
2036 | } | |
663996b3 | 2037 | |
60f067b4 JS |
2038 | q = set_put(u->pids, LONG_TO_PTR(pid)); |
2039 | if (q < 0) | |
2040 | return q; | |
663996b3 | 2041 | |
60f067b4 | 2042 | return r; |
663996b3 MS |
2043 | } |
2044 | ||
60f067b4 | 2045 | void unit_unwatch_pid(Unit *u, pid_t pid) { |
663996b3 MS |
2046 | assert(u); |
2047 | assert(pid >= 1); | |
2048 | ||
60f067b4 JS |
2049 | hashmap_remove_value(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
2050 | hashmap_remove_value(u->manager->watch_pids2, LONG_TO_PTR(pid), u); | |
2051 | set_remove(u->pids, LONG_TO_PTR(pid)); | |
663996b3 MS |
2052 | } |
2053 | ||
60f067b4 | 2054 | void unit_unwatch_all_pids(Unit *u) { |
663996b3 | 2055 | assert(u); |
663996b3 | 2056 | |
60f067b4 JS |
2057 | while (!set_isempty(u->pids)) |
2058 | unit_unwatch_pid(u, PTR_TO_LONG(set_first(u->pids))); | |
2059 | ||
2060 | set_free(u->pids); | |
2061 | u->pids = NULL; | |
663996b3 MS |
2062 | } |
2063 | ||
60f067b4 JS |
2064 | static int unit_watch_pids_in_path(Unit *u, const char *path) { |
2065 | _cleanup_closedir_ DIR *d = NULL; | |
2066 | _cleanup_fclose_ FILE *f = NULL; | |
2067 | int ret = 0, r; | |
663996b3 MS |
2068 | |
2069 | assert(u); | |
60f067b4 | 2070 | assert(path); |
663996b3 | 2071 | |
60f067b4 | 2072 | /* Adds all PIDs from a specific cgroup path to the set of PIDs we watch. */ |
663996b3 | 2073 | |
60f067b4 JS |
2074 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f); |
2075 | if (r >= 0) { | |
2076 | pid_t pid; | |
663996b3 | 2077 | |
60f067b4 JS |
2078 | while ((r = cg_read_pid(f, &pid)) > 0) { |
2079 | r = unit_watch_pid(u, pid); | |
2080 | if (r < 0 && ret >= 0) | |
2081 | ret = r; | |
2082 | } | |
2083 | if (r < 0 && ret >= 0) | |
2084 | ret = r; | |
663996b3 | 2085 | |
60f067b4 JS |
2086 | } else if (ret >= 0) |
2087 | ret = r; | |
663996b3 | 2088 | |
60f067b4 JS |
2089 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d); |
2090 | if (r >= 0) { | |
2091 | char *fn; | |
663996b3 | 2092 | |
60f067b4 JS |
2093 | while ((r = cg_read_subgroup(d, &fn)) > 0) { |
2094 | _cleanup_free_ char *p = NULL; | |
663996b3 | 2095 | |
60f067b4 JS |
2096 | p = strjoin(path, "/", fn, NULL); |
2097 | free(fn); | |
663996b3 | 2098 | |
60f067b4 JS |
2099 | if (!p) |
2100 | return -ENOMEM; | |
663996b3 | 2101 | |
60f067b4 JS |
2102 | r = unit_watch_pids_in_path(u, p); |
2103 | if (r < 0 && ret >= 0) | |
2104 | ret = r; | |
2105 | } | |
2106 | if (r < 0 && ret >= 0) | |
2107 | ret = r; | |
663996b3 | 2108 | |
60f067b4 JS |
2109 | } else if (ret >= 0) |
2110 | ret = r; | |
663996b3 | 2111 | |
60f067b4 JS |
2112 | return ret; |
2113 | } | |
663996b3 | 2114 | |
60f067b4 JS |
2115 | int unit_watch_all_pids(Unit *u) { |
2116 | assert(u); | |
2117 | ||
2118 | /* Adds all PIDs from our cgroup to the set of PIDs we watch */ | |
2119 | ||
2120 | if (!u->cgroup_path) | |
2121 | return -ENOENT; | |
663996b3 | 2122 | |
60f067b4 | 2123 | return unit_watch_pids_in_path(u, u->cgroup_path); |
663996b3 MS |
2124 | } |
2125 | ||
60f067b4 JS |
2126 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { |
2127 | Iterator i; | |
2128 | void *e; | |
2129 | ||
663996b3 | 2130 | assert(u); |
663996b3 | 2131 | |
60f067b4 | 2132 | /* Cleans dead PIDs from our list */ |
663996b3 | 2133 | |
60f067b4 JS |
2134 | SET_FOREACH(e, u->pids, i) { |
2135 | pid_t pid = PTR_TO_LONG(e); | |
663996b3 | 2136 | |
60f067b4 JS |
2137 | if (pid == except1 || pid == except2) |
2138 | continue; | |
663996b3 | 2139 | |
60f067b4 JS |
2140 | if (!pid_is_unwaited(pid)) |
2141 | unit_unwatch_pid(u, pid); | |
2142 | } | |
663996b3 MS |
2143 | } |
2144 | ||
2145 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
2146 | assert(u); | |
2147 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2148 | ||
2149 | switch (j) { | |
2150 | ||
2151 | case JOB_VERIFY_ACTIVE: | |
2152 | case JOB_START: | |
2153 | case JOB_STOP: | |
2154 | case JOB_NOP: | |
2155 | return true; | |
2156 | ||
2157 | case JOB_RESTART: | |
2158 | case JOB_TRY_RESTART: | |
2159 | return unit_can_start(u); | |
2160 | ||
2161 | case JOB_RELOAD: | |
2162 | return unit_can_reload(u); | |
2163 | ||
2164 | case JOB_RELOAD_OR_START: | |
2165 | return unit_can_reload(u) && unit_can_start(u); | |
2166 | ||
2167 | default: | |
2168 | assert_not_reached("Invalid job type"); | |
2169 | } | |
2170 | } | |
2171 | ||
e3bff60a MP |
2172 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2173 | assert(u); | |
5eef597e | 2174 | |
e3bff60a MP |
2175 | /* Only warn about some unit types */ |
2176 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2177 | return; | |
5eef597e | 2178 | |
e3bff60a MP |
2179 | if (streq_ptr(u->id, other)) |
2180 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2181 | else | |
2182 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
5eef597e MP |
2183 | } |
2184 | ||
663996b3 MS |
2185 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
2186 | ||
2187 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2188 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
2189 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, | |
2190 | [UNIT_WANTS] = UNIT_WANTED_BY, | |
e3bff60a MP |
2191 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
2192 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUISITE_OF_OVERRIDABLE, | |
663996b3 MS |
2193 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
2194 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, | |
e3bff60a MP |
2195 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
2196 | [UNIT_REQUIRED_BY_OVERRIDABLE] = UNIT_REQUIRES_OVERRIDABLE, | |
2197 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, | |
2198 | [UNIT_REQUISITE_OF_OVERRIDABLE] = UNIT_REQUISITE_OVERRIDABLE, | |
2199 | [UNIT_WANTED_BY] = UNIT_WANTS, | |
663996b3 MS |
2200 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
2201 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, | |
2202 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, | |
2203 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
2204 | [UNIT_BEFORE] = UNIT_AFTER, | |
2205 | [UNIT_AFTER] = UNIT_BEFORE, | |
2206 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, | |
2207 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, | |
2208 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, | |
2209 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
2210 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, | |
2211 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, | |
2212 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, | |
60f067b4 | 2213 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
663996b3 MS |
2214 | }; |
2215 | int r, q = 0, v = 0, w = 0; | |
5eef597e | 2216 | Unit *orig_u = u, *orig_other = other; |
663996b3 MS |
2217 | |
2218 | assert(u); | |
2219 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
2220 | assert(other); | |
2221 | ||
2222 | u = unit_follow_merge(u); | |
2223 | other = unit_follow_merge(other); | |
2224 | ||
2225 | /* We won't allow dependencies on ourselves. We will not | |
2226 | * consider them an error however. */ | |
5eef597e | 2227 | if (u == other) { |
e3bff60a | 2228 | maybe_warn_about_dependency(orig_u, orig_other->id, d); |
663996b3 | 2229 | return 0; |
5eef597e | 2230 | } |
663996b3 | 2231 | |
5eef597e | 2232 | r = set_ensure_allocated(&u->dependencies[d], NULL); |
60f067b4 | 2233 | if (r < 0) |
663996b3 MS |
2234 | return r; |
2235 | ||
60f067b4 | 2236 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
5eef597e | 2237 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], NULL); |
60f067b4 | 2238 | if (r < 0) |
663996b3 | 2239 | return r; |
60f067b4 | 2240 | } |
663996b3 | 2241 | |
60f067b4 | 2242 | if (add_reference) { |
5eef597e | 2243 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], NULL); |
60f067b4 | 2244 | if (r < 0) |
663996b3 MS |
2245 | return r; |
2246 | ||
5eef597e | 2247 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], NULL); |
60f067b4 JS |
2248 | if (r < 0) |
2249 | return r; | |
2250 | } | |
2251 | ||
2252 | q = set_put(u->dependencies[d], other); | |
2253 | if (q < 0) | |
663996b3 MS |
2254 | return q; |
2255 | ||
60f067b4 JS |
2256 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2257 | v = set_put(other->dependencies[inverse_table[d]], u); | |
2258 | if (v < 0) { | |
663996b3 MS |
2259 | r = v; |
2260 | goto fail; | |
2261 | } | |
60f067b4 | 2262 | } |
663996b3 MS |
2263 | |
2264 | if (add_reference) { | |
60f067b4 JS |
2265 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
2266 | if (w < 0) { | |
663996b3 MS |
2267 | r = w; |
2268 | goto fail; | |
2269 | } | |
2270 | ||
60f067b4 JS |
2271 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
2272 | if (r < 0) | |
663996b3 MS |
2273 | goto fail; |
2274 | } | |
2275 | ||
2276 | unit_add_to_dbus_queue(u); | |
2277 | return 0; | |
2278 | ||
2279 | fail: | |
2280 | if (q > 0) | |
2281 | set_remove(u->dependencies[d], other); | |
2282 | ||
2283 | if (v > 0) | |
2284 | set_remove(other->dependencies[inverse_table[d]], u); | |
2285 | ||
2286 | if (w > 0) | |
2287 | set_remove(u->dependencies[UNIT_REFERENCES], other); | |
2288 | ||
2289 | return r; | |
2290 | } | |
2291 | ||
2292 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { | |
2293 | int r; | |
2294 | ||
2295 | assert(u); | |
2296 | ||
5eef597e MP |
2297 | r = unit_add_dependency(u, d, other, add_reference); |
2298 | if (r < 0) | |
663996b3 MS |
2299 | return r; |
2300 | ||
e3bff60a | 2301 | return unit_add_dependency(u, e, other, add_reference); |
663996b3 MS |
2302 | } |
2303 | ||
e3bff60a MP |
2304 | static int resolve_template(Unit *u, const char *name, const char*path, char **buf, const char **ret) { |
2305 | int r; | |
663996b3 MS |
2306 | |
2307 | assert(u); | |
2308 | assert(name || path); | |
e3bff60a MP |
2309 | assert(buf); |
2310 | assert(ret); | |
663996b3 MS |
2311 | |
2312 | if (!name) | |
60f067b4 | 2313 | name = basename(path); |
663996b3 | 2314 | |
e3bff60a MP |
2315 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2316 | *buf = NULL; | |
2317 | *ret = name; | |
2318 | return 0; | |
663996b3 MS |
2319 | } |
2320 | ||
2321 | if (u->instance) | |
e3bff60a | 2322 | r = unit_name_replace_instance(name, u->instance, buf); |
663996b3 MS |
2323 | else { |
2324 | _cleanup_free_ char *i = NULL; | |
2325 | ||
e3bff60a MP |
2326 | r = unit_name_to_prefix(u->id, &i); |
2327 | if (r < 0) | |
2328 | return r; | |
663996b3 | 2329 | |
e3bff60a | 2330 | r = unit_name_replace_instance(name, i, buf); |
663996b3 | 2331 | } |
e3bff60a MP |
2332 | if (r < 0) |
2333 | return r; | |
663996b3 | 2334 | |
e3bff60a MP |
2335 | *ret = *buf; |
2336 | return 0; | |
663996b3 MS |
2337 | } |
2338 | ||
2339 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { | |
e3bff60a | 2340 | _cleanup_free_ char *buf = NULL; |
663996b3 MS |
2341 | Unit *other; |
2342 | int r; | |
663996b3 MS |
2343 | |
2344 | assert(u); | |
2345 | assert(name || path); | |
2346 | ||
e3bff60a MP |
2347 | r = resolve_template(u, name, path, &buf, &name); |
2348 | if (r < 0) | |
2349 | return r; | |
663996b3 MS |
2350 | |
2351 | r = manager_load_unit(u->manager, name, path, NULL, &other); | |
2352 | if (r < 0) | |
2353 | return r; | |
2354 | ||
2355 | return unit_add_dependency(u, d, other, add_reference); | |
2356 | } | |
2357 | ||
2358 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { | |
e3bff60a | 2359 | _cleanup_free_ char *buf = NULL; |
663996b3 MS |
2360 | Unit *other; |
2361 | int r; | |
663996b3 MS |
2362 | |
2363 | assert(u); | |
2364 | assert(name || path); | |
2365 | ||
e3bff60a MP |
2366 | r = resolve_template(u, name, path, &buf, &name); |
2367 | if (r < 0) | |
2368 | return r; | |
663996b3 | 2369 | |
5eef597e MP |
2370 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2371 | if (r < 0) | |
14228c0d | 2372 | return r; |
663996b3 | 2373 | |
5eef597e | 2374 | return unit_add_two_dependencies(u, d, e, other, add_reference); |
663996b3 MS |
2375 | } |
2376 | ||
2377 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { | |
e3bff60a | 2378 | _cleanup_free_ char *buf = NULL; |
663996b3 MS |
2379 | Unit *other; |
2380 | int r; | |
663996b3 MS |
2381 | |
2382 | assert(u); | |
2383 | assert(name || path); | |
2384 | ||
e3bff60a MP |
2385 | r = resolve_template(u, name, path, &buf, &name); |
2386 | if (r < 0) | |
2387 | return r; | |
663996b3 | 2388 | |
5eef597e MP |
2389 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2390 | if (r < 0) | |
14228c0d | 2391 | return r; |
663996b3 | 2392 | |
5eef597e | 2393 | return unit_add_dependency(other, d, u, add_reference); |
663996b3 MS |
2394 | } |
2395 | ||
2396 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { | |
e3bff60a | 2397 | _cleanup_free_ char *buf = NULL; |
663996b3 MS |
2398 | Unit *other; |
2399 | int r; | |
663996b3 MS |
2400 | |
2401 | assert(u); | |
2402 | assert(name || path); | |
2403 | ||
e3bff60a | 2404 | r = resolve_template(u, name, path, &buf, &name); |
5eef597e | 2405 | if (r < 0) |
14228c0d | 2406 | return r; |
663996b3 | 2407 | |
e3bff60a | 2408 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
5eef597e | 2409 | if (r < 0) |
14228c0d | 2410 | return r; |
663996b3 | 2411 | |
e3bff60a | 2412 | return unit_add_two_dependencies(other, d, e, u, add_reference); |
663996b3 MS |
2413 | } |
2414 | ||
2415 | int set_unit_path(const char *p) { | |
663996b3 | 2416 | /* This is mostly for debug purposes */ |
5eef597e | 2417 | if (setenv("SYSTEMD_UNIT_PATH", p, 0) < 0) |
663996b3 MS |
2418 | return -errno; |
2419 | ||
2420 | return 0; | |
2421 | } | |
2422 | ||
2423 | char *unit_dbus_path(Unit *u) { | |
2424 | assert(u); | |
2425 | ||
2426 | if (!u->id) | |
2427 | return NULL; | |
2428 | ||
2429 | return unit_dbus_path_from_name(u->id); | |
2430 | } | |
2431 | ||
14228c0d MB |
2432 | char *unit_default_cgroup_path(Unit *u) { |
2433 | _cleanup_free_ char *escaped = NULL, *slice = NULL; | |
663996b3 MS |
2434 | int r; |
2435 | ||
2436 | assert(u); | |
663996b3 | 2437 | |
14228c0d MB |
2438 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
2439 | return strdup(u->manager->cgroup_root); | |
663996b3 | 2440 | |
14228c0d MB |
2441 | if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) { |
2442 | r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice); | |
2443 | if (r < 0) | |
2444 | return NULL; | |
663996b3 MS |
2445 | } |
2446 | ||
14228c0d MB |
2447 | escaped = cg_escape(u->id); |
2448 | if (!escaped) | |
663996b3 MS |
2449 | return NULL; |
2450 | ||
14228c0d MB |
2451 | if (slice) |
2452 | return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL); | |
2453 | else | |
2454 | return strjoin(u->manager->cgroup_root, "/", escaped, NULL); | |
663996b3 MS |
2455 | } |
2456 | ||
60f067b4 | 2457 | int unit_add_default_slice(Unit *u, CGroupContext *c) { |
14228c0d MB |
2458 | _cleanup_free_ char *b = NULL; |
2459 | const char *slice_name; | |
2460 | Unit *slice; | |
663996b3 MS |
2461 | int r; |
2462 | ||
2463 | assert(u); | |
60f067b4 | 2464 | assert(c); |
663996b3 | 2465 | |
14228c0d | 2466 | if (UNIT_ISSET(u->slice)) |
663996b3 MS |
2467 | return 0; |
2468 | ||
14228c0d MB |
2469 | if (u->instance) { |
2470 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
663996b3 | 2471 | |
14228c0d MB |
2472 | /* Implicitly place all instantiated units in their |
2473 | * own per-template slice */ | |
663996b3 | 2474 | |
e3bff60a MP |
2475 | r = unit_name_to_prefix(u->id, &prefix); |
2476 | if (r < 0) | |
2477 | return r; | |
663996b3 | 2478 | |
14228c0d MB |
2479 | /* The prefix is already escaped, but it might include |
2480 | * "-" which has a special meaning for slice units, | |
2481 | * hence escape it here extra. */ | |
e3bff60a | 2482 | escaped = unit_name_escape(prefix); |
14228c0d MB |
2483 | if (!escaped) |
2484 | return -ENOMEM; | |
663996b3 | 2485 | |
e3bff60a | 2486 | if (u->manager->running_as == MANAGER_SYSTEM) |
14228c0d MB |
2487 | b = strjoin("system-", escaped, ".slice", NULL); |
2488 | else | |
2489 | b = strappend(escaped, ".slice"); | |
2490 | if (!b) | |
2491 | return -ENOMEM; | |
663996b3 | 2492 | |
14228c0d MB |
2493 | slice_name = b; |
2494 | } else | |
2495 | slice_name = | |
e3bff60a | 2496 | u->manager->running_as == MANAGER_SYSTEM |
14228c0d MB |
2497 | ? SPECIAL_SYSTEM_SLICE |
2498 | : SPECIAL_ROOT_SLICE; | |
663996b3 | 2499 | |
14228c0d | 2500 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); |
663996b3 MS |
2501 | if (r < 0) |
2502 | return r; | |
2503 | ||
14228c0d | 2504 | unit_ref_set(&u->slice, slice); |
663996b3 MS |
2505 | return 0; |
2506 | } | |
2507 | ||
14228c0d | 2508 | const char *unit_slice_name(Unit *u) { |
663996b3 | 2509 | assert(u); |
663996b3 | 2510 | |
14228c0d MB |
2511 | if (!UNIT_ISSET(u->slice)) |
2512 | return NULL; | |
663996b3 | 2513 | |
14228c0d | 2514 | return UNIT_DEREF(u->slice)->id; |
663996b3 MS |
2515 | } |
2516 | ||
2517 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { | |
2518 | _cleanup_free_ char *t = NULL; | |
2519 | int r; | |
2520 | ||
2521 | assert(u); | |
2522 | assert(type); | |
2523 | assert(_found); | |
2524 | ||
e3bff60a MP |
2525 | r = unit_name_change_suffix(u->id, type, &t); |
2526 | if (r < 0) | |
2527 | return r; | |
2528 | if (unit_has_name(u, t)) | |
2529 | return -EINVAL; | |
663996b3 MS |
2530 | |
2531 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); | |
2532 | assert(r < 0 || *_found != u); | |
2533 | return r; | |
2534 | } | |
2535 | ||
663996b3 MS |
2536 | int unit_watch_bus_name(Unit *u, const char *name) { |
2537 | assert(u); | |
2538 | assert(name); | |
2539 | ||
2540 | /* Watch a specific name on the bus. We only support one unit | |
2541 | * watching each name for now. */ | |
2542 | ||
2543 | return hashmap_put(u->manager->watch_bus, name, u); | |
2544 | } | |
2545 | ||
2546 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2547 | assert(u); | |
2548 | assert(name); | |
2549 | ||
2550 | hashmap_remove_value(u->manager->watch_bus, name, u); | |
2551 | } | |
2552 | ||
2553 | bool unit_can_serialize(Unit *u) { | |
2554 | assert(u); | |
2555 | ||
2556 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2557 | } | |
2558 | ||
2559 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { | |
2560 | int r; | |
2561 | ||
2562 | assert(u); | |
2563 | assert(f); | |
2564 | assert(fds); | |
2565 | ||
60f067b4 JS |
2566 | if (unit_can_serialize(u)) { |
2567 | ExecRuntime *rt; | |
663996b3 | 2568 | |
60f067b4 JS |
2569 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
2570 | if (r < 0) | |
2571 | return r; | |
663996b3 | 2572 | |
60f067b4 JS |
2573 | rt = unit_get_exec_runtime(u); |
2574 | if (rt) { | |
e3bff60a | 2575 | r = exec_runtime_serialize(u, rt, f, fds); |
60f067b4 JS |
2576 | if (r < 0) |
2577 | return r; | |
663996b3 MS |
2578 | } |
2579 | } | |
2580 | ||
2581 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); | |
2582 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2583 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2584 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2585 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
f47781d8 | 2586 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
663996b3 MS |
2587 | |
2588 | if (dual_timestamp_is_set(&u->condition_timestamp)) | |
2589 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
2590 | ||
f47781d8 MP |
2591 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
2592 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
2593 | ||
14228c0d | 2594 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
e3bff60a | 2595 | unit_serialize_item_format(u, f, "cpuacct-usage-base", "%" PRIu64, u->cpuacct_usage_base); |
14228c0d MB |
2596 | |
2597 | if (u->cgroup_path) | |
2598 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
86f210e9 | 2599 | unit_serialize_item(u, f, "cgroup-realized", yes_no(u->cgroup_realized)); |
14228c0d | 2600 | |
60f067b4 JS |
2601 | if (serialize_jobs) { |
2602 | if (u->job) { | |
2603 | fprintf(f, "job\n"); | |
2604 | job_serialize(u->job, f, fds); | |
2605 | } | |
2606 | ||
2607 | if (u->nop_job) { | |
2608 | fprintf(f, "job\n"); | |
2609 | job_serialize(u->nop_job, f, fds); | |
2610 | } | |
2611 | } | |
2612 | ||
663996b3 MS |
2613 | /* End marker */ |
2614 | fputc('\n', f); | |
2615 | return 0; | |
2616 | } | |
2617 | ||
2618 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2619 | va_list ap; | |
2620 | ||
2621 | assert(u); | |
2622 | assert(f); | |
2623 | assert(key); | |
2624 | assert(format); | |
2625 | ||
2626 | fputs(key, f); | |
2627 | fputc('=', f); | |
2628 | ||
2629 | va_start(ap, format); | |
2630 | vfprintf(f, format, ap); | |
2631 | va_end(ap); | |
2632 | ||
2633 | fputc('\n', f); | |
2634 | } | |
2635 | ||
2636 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2637 | assert(u); | |
2638 | assert(f); | |
2639 | assert(key); | |
2640 | assert(value); | |
2641 | ||
2642 | fprintf(f, "%s=%s\n", key, value); | |
2643 | } | |
2644 | ||
e3bff60a MP |
2645 | static int unit_set_cgroup_path(Unit *u, const char *path) { |
2646 | _cleanup_free_ char *p = NULL; | |
2647 | int r; | |
2648 | ||
2649 | assert(u); | |
2650 | ||
2651 | if (path) { | |
2652 | p = strdup(path); | |
2653 | if (!p) | |
2654 | return -ENOMEM; | |
2655 | } else | |
2656 | p = NULL; | |
2657 | ||
2658 | if (streq_ptr(u->cgroup_path, p)) | |
2659 | return 0; | |
2660 | ||
2661 | if (p) { | |
2662 | r = hashmap_put(u->manager->cgroup_unit, p, u); | |
2663 | if (r < 0) | |
2664 | return r; | |
2665 | } | |
2666 | ||
2667 | if (u->cgroup_path) { | |
2668 | log_unit_debug(u, "Changing cgroup path from %s to %s.", u->cgroup_path, strna(p)); | |
2669 | hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
2670 | free(u->cgroup_path); | |
2671 | } | |
2672 | ||
2673 | u->cgroup_path = p; | |
2674 | p = NULL; | |
2675 | ||
2676 | return 0; | |
2677 | } | |
2678 | ||
663996b3 | 2679 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
60f067b4 JS |
2680 | ExecRuntime **rt = NULL; |
2681 | size_t offset; | |
663996b3 MS |
2682 | int r; |
2683 | ||
2684 | assert(u); | |
2685 | assert(f); | |
2686 | assert(fds); | |
2687 | ||
60f067b4 JS |
2688 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2689 | if (offset > 0) | |
2690 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
663996b3 MS |
2691 | |
2692 | for (;;) { | |
2693 | char line[LINE_MAX], *l, *v; | |
2694 | size_t k; | |
2695 | ||
2696 | if (!fgets(line, sizeof(line), f)) { | |
2697 | if (feof(f)) | |
2698 | return 0; | |
2699 | return -errno; | |
2700 | } | |
2701 | ||
2702 | char_array_0(line); | |
2703 | l = strstrip(line); | |
2704 | ||
2705 | /* End marker */ | |
e3bff60a | 2706 | if (isempty(l)) |
663996b3 MS |
2707 | return 0; |
2708 | ||
2709 | k = strcspn(l, "="); | |
2710 | ||
2711 | if (l[k] == '=') { | |
2712 | l[k] = 0; | |
2713 | v = l+k+1; | |
2714 | } else | |
2715 | v = l+k; | |
2716 | ||
2717 | if (streq(l, "job")) { | |
2718 | if (v[0] == '\0') { | |
2719 | /* new-style serialized job */ | |
e735f4d4 MP |
2720 | Job *j; |
2721 | ||
2722 | j = job_new_raw(u); | |
663996b3 | 2723 | if (!j) |
e3bff60a | 2724 | return log_oom(); |
663996b3 MS |
2725 | |
2726 | r = job_deserialize(j, f, fds); | |
2727 | if (r < 0) { | |
2728 | job_free(j); | |
2729 | return r; | |
2730 | } | |
2731 | ||
2732 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); | |
2733 | if (r < 0) { | |
2734 | job_free(j); | |
2735 | return r; | |
2736 | } | |
2737 | ||
2738 | r = job_install_deserialized(j); | |
2739 | if (r < 0) { | |
2740 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2741 | job_free(j); | |
2742 | return r; | |
2743 | } | |
e3bff60a MP |
2744 | } else /* legacy for pre-44 */ |
2745 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); | |
663996b3 MS |
2746 | continue; |
2747 | } else if (streq(l, "inactive-exit-timestamp")) { | |
2748 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); | |
2749 | continue; | |
2750 | } else if (streq(l, "active-enter-timestamp")) { | |
2751 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); | |
2752 | continue; | |
2753 | } else if (streq(l, "active-exit-timestamp")) { | |
2754 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); | |
2755 | continue; | |
2756 | } else if (streq(l, "inactive-enter-timestamp")) { | |
2757 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); | |
2758 | continue; | |
2759 | } else if (streq(l, "condition-timestamp")) { | |
2760 | dual_timestamp_deserialize(v, &u->condition_timestamp); | |
2761 | continue; | |
f47781d8 MP |
2762 | } else if (streq(l, "assert-timestamp")) { |
2763 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
2764 | continue; | |
663996b3 | 2765 | } else if (streq(l, "condition-result")) { |
663996b3 | 2766 | |
e3bff60a MP |
2767 | r = parse_boolean(v); |
2768 | if (r < 0) | |
2769 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); | |
663996b3 | 2770 | else |
e3bff60a | 2771 | u->condition_result = r; |
663996b3 MS |
2772 | |
2773 | continue; | |
14228c0d | 2774 | |
f47781d8 | 2775 | } else if (streq(l, "assert-result")) { |
f47781d8 | 2776 | |
e3bff60a MP |
2777 | r = parse_boolean(v); |
2778 | if (r < 0) | |
2779 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); | |
f47781d8 | 2780 | else |
e3bff60a | 2781 | u->assert_result = r; |
f47781d8 MP |
2782 | |
2783 | continue; | |
2784 | ||
14228c0d | 2785 | } else if (streq(l, "transient")) { |
14228c0d | 2786 | |
e3bff60a MP |
2787 | r = parse_boolean(v); |
2788 | if (r < 0) | |
2789 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); | |
14228c0d | 2790 | else |
e3bff60a | 2791 | u->transient = r; |
14228c0d MB |
2792 | |
2793 | continue; | |
14228c0d | 2794 | |
e3bff60a | 2795 | } else if (streq(l, "cpuacct-usage-base")) { |
14228c0d | 2796 | |
e3bff60a MP |
2797 | r = safe_atou64(v, &u->cpuacct_usage_base); |
2798 | if (r < 0) | |
2799 | log_unit_debug(u, "Failed to parse CPU usage %s, ignoring.", v); | |
14228c0d | 2800 | |
e3bff60a | 2801 | continue; |
60f067b4 | 2802 | |
e3bff60a MP |
2803 | } else if (streq(l, "cgroup")) { |
2804 | ||
2805 | r = unit_set_cgroup_path(u, v); | |
2806 | if (r < 0) | |
2807 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); | |
60f067b4 | 2808 | |
86f210e9 MP |
2809 | continue; |
2810 | } else if (streq(l, "cgroup-realized")) { | |
2811 | int b; | |
2812 | ||
2813 | b = parse_boolean(v); | |
2814 | if (b < 0) | |
2815 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
2816 | else | |
2817 | u->cgroup_realized = b; | |
2818 | ||
14228c0d | 2819 | continue; |
663996b3 MS |
2820 | } |
2821 | ||
60f067b4 JS |
2822 | if (unit_can_serialize(u)) { |
2823 | if (rt) { | |
e3bff60a MP |
2824 | r = exec_runtime_deserialize_item(u, rt, l, v, fds); |
2825 | if (r < 0) { | |
2826 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); | |
2827 | continue; | |
2828 | } | |
2829 | ||
2830 | /* Returns positive if key was handled by the call */ | |
60f067b4 JS |
2831 | if (r > 0) |
2832 | continue; | |
2833 | } | |
2834 | ||
2835 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); | |
2836 | if (r < 0) | |
e3bff60a | 2837 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
60f067b4 | 2838 | } |
663996b3 MS |
2839 | } |
2840 | } | |
2841 | ||
2842 | int unit_add_node_link(Unit *u, const char *what, bool wants) { | |
2843 | Unit *device; | |
14228c0d | 2844 | _cleanup_free_ char *e = NULL; |
663996b3 MS |
2845 | int r; |
2846 | ||
2847 | assert(u); | |
2848 | ||
663996b3 | 2849 | /* Adds in links to the device node that this unit is based on */ |
e3bff60a MP |
2850 | if (isempty(what)) |
2851 | return 0; | |
663996b3 MS |
2852 | |
2853 | if (!is_device_path(what)) | |
2854 | return 0; | |
2855 | ||
e3bff60a MP |
2856 | /* When device units aren't supported (such as in a |
2857 | * container), don't create dependencies on them. */ | |
2858 | if (!unit_type_supported(UNIT_DEVICE)) | |
2859 | return 0; | |
663996b3 | 2860 | |
e3bff60a MP |
2861 | r = unit_name_from_path(what, ".device", &e); |
2862 | if (r < 0) | |
2863 | return r; | |
14228c0d | 2864 | |
e3bff60a | 2865 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
663996b3 MS |
2866 | if (r < 0) |
2867 | return r; | |
2868 | ||
e3bff60a | 2869 | r = unit_add_two_dependencies(u, UNIT_AFTER, u->manager->running_as == MANAGER_SYSTEM ? UNIT_BINDS_TO : UNIT_WANTS, device, true); |
663996b3 MS |
2870 | if (r < 0) |
2871 | return r; | |
2872 | ||
2873 | if (wants) { | |
2874 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2875 | if (r < 0) | |
2876 | return r; | |
2877 | } | |
2878 | ||
2879 | return 0; | |
2880 | } | |
2881 | ||
2882 | int unit_coldplug(Unit *u) { | |
2883 | int r; | |
2884 | ||
2885 | assert(u); | |
2886 | ||
e3bff60a MP |
2887 | /* Make sure we don't enter a loop, when coldplugging |
2888 | * recursively. */ | |
2889 | if (u->coldplugged) | |
2890 | return 0; | |
2891 | ||
2892 | u->coldplugged = true; | |
2893 | ||
2894 | if (UNIT_VTABLE(u)->coldplug) { | |
2895 | r = UNIT_VTABLE(u)->coldplug(u); | |
2896 | if (r < 0) | |
663996b3 | 2897 | return r; |
e3bff60a | 2898 | } |
663996b3 MS |
2899 | |
2900 | if (u->job) { | |
2901 | r = job_coldplug(u->job); | |
2902 | if (r < 0) | |
2903 | return r; | |
663996b3 MS |
2904 | } |
2905 | ||
2906 | return 0; | |
2907 | } | |
2908 | ||
663996b3 | 2909 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
60f067b4 | 2910 | DISABLE_WARNING_FORMAT_NONLITERAL; |
5eef597e MP |
2911 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, |
2912 | status, unit_status_msg_format, unit_description(u)); | |
60f067b4 | 2913 | REENABLE_WARNING; |
663996b3 | 2914 | } |
663996b3 MS |
2915 | |
2916 | bool unit_need_daemon_reload(Unit *u) { | |
2917 | _cleanup_strv_free_ char **t = NULL; | |
2918 | char **path; | |
2919 | struct stat st; | |
2920 | unsigned loaded_cnt, current_cnt; | |
2921 | ||
2922 | assert(u); | |
2923 | ||
2924 | if (u->fragment_path) { | |
2925 | zero(st); | |
2926 | if (stat(u->fragment_path, &st) < 0) | |
2927 | /* What, cannot access this anymore? */ | |
2928 | return true; | |
2929 | ||
2930 | if (u->fragment_mtime > 0 && | |
2931 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
2932 | return true; | |
2933 | } | |
2934 | ||
2935 | if (u->source_path) { | |
2936 | zero(st); | |
2937 | if (stat(u->source_path, &st) < 0) | |
2938 | return true; | |
2939 | ||
2940 | if (u->source_mtime > 0 && | |
2941 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2942 | return true; | |
2943 | } | |
2944 | ||
e735f4d4 | 2945 | (void) unit_find_dropin_paths(u, &t); |
663996b3 MS |
2946 | loaded_cnt = strv_length(t); |
2947 | current_cnt = strv_length(u->dropin_paths); | |
2948 | ||
2949 | if (loaded_cnt == current_cnt) { | |
2950 | if (loaded_cnt == 0) | |
2951 | return false; | |
2952 | ||
2953 | if (strv_overlap(u->dropin_paths, t)) { | |
2954 | STRV_FOREACH(path, u->dropin_paths) { | |
2955 | zero(st); | |
2956 | if (stat(*path, &st) < 0) | |
2957 | return true; | |
2958 | ||
2959 | if (u->dropin_mtime > 0 && | |
2960 | timespec_load(&st.st_mtim) > u->dropin_mtime) | |
2961 | return true; | |
2962 | } | |
2963 | ||
2964 | return false; | |
2965 | } else | |
2966 | return true; | |
2967 | } else | |
2968 | return true; | |
2969 | } | |
2970 | ||
2971 | void unit_reset_failed(Unit *u) { | |
2972 | assert(u); | |
2973 | ||
2974 | if (UNIT_VTABLE(u)->reset_failed) | |
2975 | UNIT_VTABLE(u)->reset_failed(u); | |
2976 | } | |
2977 | ||
2978 | Unit *unit_following(Unit *u) { | |
2979 | assert(u); | |
2980 | ||
2981 | if (UNIT_VTABLE(u)->following) | |
2982 | return UNIT_VTABLE(u)->following(u); | |
2983 | ||
2984 | return NULL; | |
2985 | } | |
2986 | ||
2987 | bool unit_stop_pending(Unit *u) { | |
2988 | assert(u); | |
2989 | ||
2990 | /* This call does check the current state of the unit. It's | |
2991 | * hence useful to be called from state change calls of the | |
2992 | * unit itself, where the state isn't updated yet. This is | |
2993 | * different from unit_inactive_or_pending() which checks both | |
2994 | * the current state and for a queued job. */ | |
2995 | ||
2996 | return u->job && u->job->type == JOB_STOP; | |
2997 | } | |
2998 | ||
2999 | bool unit_inactive_or_pending(Unit *u) { | |
3000 | assert(u); | |
3001 | ||
3002 | /* Returns true if the unit is inactive or going down */ | |
3003 | ||
3004 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) | |
3005 | return true; | |
3006 | ||
3007 | if (unit_stop_pending(u)) | |
3008 | return true; | |
3009 | ||
3010 | return false; | |
3011 | } | |
3012 | ||
3013 | bool unit_active_or_pending(Unit *u) { | |
3014 | assert(u); | |
3015 | ||
3016 | /* Returns true if the unit is active or going up */ | |
3017 | ||
3018 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3019 | return true; | |
3020 | ||
3021 | if (u->job && | |
3022 | (u->job->type == JOB_START || | |
3023 | u->job->type == JOB_RELOAD_OR_START || | |
3024 | u->job->type == JOB_RESTART)) | |
3025 | return true; | |
3026 | ||
3027 | return false; | |
3028 | } | |
3029 | ||
60f067b4 | 3030 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
663996b3 MS |
3031 | assert(u); |
3032 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
3033 | assert(signo > 0); | |
3034 | assert(signo < _NSIG); | |
3035 | ||
3036 | if (!UNIT_VTABLE(u)->kill) | |
e3bff60a | 3037 | return -EOPNOTSUPP; |
663996b3 MS |
3038 | |
3039 | return UNIT_VTABLE(u)->kill(u, w, signo, error); | |
3040 | } | |
3041 | ||
14228c0d MB |
3042 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
3043 | Set *pid_set; | |
3044 | int r; | |
3045 | ||
5eef597e | 3046 | pid_set = set_new(NULL); |
14228c0d MB |
3047 | if (!pid_set) |
3048 | return NULL; | |
3049 | ||
3050 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3051 | if (main_pid > 0) { | |
3052 | r = set_put(pid_set, LONG_TO_PTR(main_pid)); | |
3053 | if (r < 0) | |
3054 | goto fail; | |
3055 | } | |
3056 | ||
3057 | if (control_pid > 0) { | |
3058 | r = set_put(pid_set, LONG_TO_PTR(control_pid)); | |
3059 | if (r < 0) | |
3060 | goto fail; | |
3061 | } | |
3062 | ||
3063 | return pid_set; | |
3064 | ||
3065 | fail: | |
3066 | set_free(pid_set); | |
3067 | return NULL; | |
3068 | } | |
3069 | ||
663996b3 MS |
3070 | int unit_kill_common( |
3071 | Unit *u, | |
3072 | KillWho who, | |
3073 | int signo, | |
3074 | pid_t main_pid, | |
3075 | pid_t control_pid, | |
60f067b4 | 3076 | sd_bus_error *error) { |
663996b3 MS |
3077 | |
3078 | int r = 0; | |
3079 | ||
3080 | if (who == KILL_MAIN && main_pid <= 0) { | |
3081 | if (main_pid < 0) | |
f47781d8 | 3082 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
663996b3 | 3083 | else |
f47781d8 | 3084 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
663996b3 MS |
3085 | } |
3086 | ||
3087 | if (who == KILL_CONTROL && control_pid <= 0) { | |
3088 | if (control_pid < 0) | |
f47781d8 | 3089 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
663996b3 | 3090 | else |
f47781d8 | 3091 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
663996b3 MS |
3092 | } |
3093 | ||
3094 | if (who == KILL_CONTROL || who == KILL_ALL) | |
3095 | if (control_pid > 0) | |
3096 | if (kill(control_pid, signo) < 0) | |
3097 | r = -errno; | |
3098 | ||
3099 | if (who == KILL_MAIN || who == KILL_ALL) | |
3100 | if (main_pid > 0) | |
3101 | if (kill(main_pid, signo) < 0) | |
3102 | r = -errno; | |
3103 | ||
14228c0d | 3104 | if (who == KILL_ALL && u->cgroup_path) { |
663996b3 MS |
3105 | _cleanup_set_free_ Set *pid_set = NULL; |
3106 | int q; | |
3107 | ||
14228c0d MB |
3108 | /* Exclude the main/control pids from being killed via the cgroup */ |
3109 | pid_set = unit_pid_set(main_pid, control_pid); | |
663996b3 MS |
3110 | if (!pid_set) |
3111 | return -ENOMEM; | |
3112 | ||
14228c0d | 3113 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set); |
663996b3 MS |
3114 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
3115 | r = q; | |
3116 | } | |
3117 | ||
3118 | return r; | |
3119 | } | |
3120 | ||
3121 | int unit_following_set(Unit *u, Set **s) { | |
3122 | assert(u); | |
3123 | assert(s); | |
3124 | ||
3125 | if (UNIT_VTABLE(u)->following_set) | |
3126 | return UNIT_VTABLE(u)->following_set(u, s); | |
3127 | ||
3128 | *s = NULL; | |
3129 | return 0; | |
3130 | } | |
3131 | ||
3132 | UnitFileState unit_get_unit_file_state(Unit *u) { | |
3133 | assert(u); | |
3134 | ||
3135 | if (u->unit_file_state < 0 && u->fragment_path) | |
3136 | u->unit_file_state = unit_file_get_state( | |
e3bff60a | 3137 | u->manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
60f067b4 | 3138 | NULL, basename(u->fragment_path)); |
663996b3 MS |
3139 | |
3140 | return u->unit_file_state; | |
3141 | } | |
3142 | ||
f47781d8 MP |
3143 | int unit_get_unit_file_preset(Unit *u) { |
3144 | assert(u); | |
3145 | ||
3146 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3147 | u->unit_file_preset = unit_file_query_preset( | |
e3bff60a | 3148 | u->manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
f47781d8 MP |
3149 | NULL, basename(u->fragment_path)); |
3150 | ||
3151 | return u->unit_file_preset; | |
3152 | } | |
3153 | ||
663996b3 MS |
3154 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
3155 | assert(ref); | |
3156 | assert(u); | |
3157 | ||
3158 | if (ref->unit) | |
3159 | unit_ref_unset(ref); | |
3160 | ||
3161 | ref->unit = u; | |
60f067b4 | 3162 | LIST_PREPEND(refs, u->refs, ref); |
663996b3 MS |
3163 | return u; |
3164 | } | |
3165 | ||
3166 | void unit_ref_unset(UnitRef *ref) { | |
3167 | assert(ref); | |
3168 | ||
3169 | if (!ref->unit) | |
3170 | return; | |
3171 | ||
60f067b4 | 3172 | LIST_REMOVE(refs, ref->unit->refs, ref); |
663996b3 MS |
3173 | ref->unit = NULL; |
3174 | } | |
3175 | ||
60f067b4 JS |
3176 | int unit_patch_contexts(Unit *u) { |
3177 | CGroupContext *cc; | |
3178 | ExecContext *ec; | |
3179 | unsigned i; | |
14228c0d | 3180 | int r; |
663996b3 MS |
3181 | |
3182 | assert(u); | |
663996b3 | 3183 | |
60f067b4 JS |
3184 | /* Patch in the manager defaults into the exec and cgroup |
3185 | * contexts, _after_ the rest of the settings have been | |
3186 | * initialized */ | |
663996b3 | 3187 | |
60f067b4 JS |
3188 | ec = unit_get_exec_context(u); |
3189 | if (ec) { | |
3190 | /* This only copies in the ones that need memory */ | |
3191 | for (i = 0; i < _RLIMIT_MAX; i++) | |
3192 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
3193 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
3194 | if (!ec->rlimit[i]) | |
3195 | return -ENOMEM; | |
3196 | } | |
663996b3 | 3197 | |
e3bff60a | 3198 | if (u->manager->running_as == MANAGER_USER && |
60f067b4 | 3199 | !ec->working_directory) { |
663996b3 | 3200 | |
60f067b4 | 3201 | r = get_home_dir(&ec->working_directory); |
14228c0d MB |
3202 | if (r < 0) |
3203 | return r; | |
e735f4d4 MP |
3204 | |
3205 | /* Allow user services to run, even if the | |
3206 | * home directory is missing */ | |
3207 | ec->working_directory_missing_ok = true; | |
14228c0d | 3208 | } |
663996b3 | 3209 | |
e3bff60a | 3210 | if (u->manager->running_as == MANAGER_USER && |
60f067b4 JS |
3211 | (ec->syscall_whitelist || |
3212 | !set_isempty(ec->syscall_filter) || | |
3213 | !set_isempty(ec->syscall_archs) || | |
3214 | ec->address_families_whitelist || | |
3215 | !set_isempty(ec->address_families))) | |
3216 | ec->no_new_privileges = true; | |
663996b3 | 3217 | |
60f067b4 JS |
3218 | if (ec->private_devices) |
3219 | ec->capability_bounding_set_drop |= (uint64_t) 1ULL << (uint64_t) CAP_MKNOD; | |
3220 | } | |
663996b3 | 3221 | |
60f067b4 JS |
3222 | cc = unit_get_cgroup_context(u); |
3223 | if (cc) { | |
663996b3 | 3224 | |
60f067b4 JS |
3225 | if (ec && |
3226 | ec->private_devices && | |
3227 | cc->device_policy == CGROUP_AUTO) | |
3228 | cc->device_policy = CGROUP_CLOSED; | |
663996b3 MS |
3229 | } |
3230 | ||
3231 | return 0; | |
3232 | } | |
3233 | ||
3234 | ExecContext *unit_get_exec_context(Unit *u) { | |
3235 | size_t offset; | |
3236 | assert(u); | |
3237 | ||
60f067b4 JS |
3238 | if (u->type < 0) |
3239 | return NULL; | |
3240 | ||
663996b3 MS |
3241 | offset = UNIT_VTABLE(u)->exec_context_offset; |
3242 | if (offset <= 0) | |
3243 | return NULL; | |
3244 | ||
3245 | return (ExecContext*) ((uint8_t*) u + offset); | |
3246 | } | |
3247 | ||
60f067b4 JS |
3248 | KillContext *unit_get_kill_context(Unit *u) { |
3249 | size_t offset; | |
3250 | assert(u); | |
3251 | ||
3252 | if (u->type < 0) | |
3253 | return NULL; | |
3254 | ||
3255 | offset = UNIT_VTABLE(u)->kill_context_offset; | |
3256 | if (offset <= 0) | |
3257 | return NULL; | |
3258 | ||
3259 | return (KillContext*) ((uint8_t*) u + offset); | |
3260 | } | |
3261 | ||
14228c0d MB |
3262 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
3263 | size_t offset; | |
3264 | ||
60f067b4 JS |
3265 | if (u->type < 0) |
3266 | return NULL; | |
3267 | ||
14228c0d MB |
3268 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
3269 | if (offset <= 0) | |
3270 | return NULL; | |
3271 | ||
3272 | return (CGroupContext*) ((uint8_t*) u + offset); | |
3273 | } | |
3274 | ||
60f067b4 JS |
3275 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
3276 | size_t offset; | |
3277 | ||
3278 | if (u->type < 0) | |
3279 | return NULL; | |
3280 | ||
3281 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3282 | if (offset <= 0) | |
3283 | return NULL; | |
3284 | ||
3285 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
3286 | } | |
3287 | ||
e842803a | 3288 | static int unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode, bool transient, char **dir) { |
e3bff60a | 3289 | if (u->manager->running_as == MANAGER_USER) { |
e842803a | 3290 | int r; |
663996b3 | 3291 | |
5eef597e MP |
3292 | if (mode == UNIT_PERSISTENT && !transient) |
3293 | r = user_config_home(dir); | |
3294 | else | |
3295 | r = user_runtime_dir(dir); | |
3296 | ||
663996b3 MS |
3297 | if (r == 0) |
3298 | return -ENOENT; | |
e842803a MB |
3299 | return r; |
3300 | } | |
663996b3 | 3301 | |
e842803a MB |
3302 | if (mode == UNIT_PERSISTENT && !transient) |
3303 | *dir = strdup("/etc/systemd/system"); | |
14228c0d | 3304 | else |
e842803a MB |
3305 | *dir = strdup("/run/systemd/system"); |
3306 | if (!*dir) | |
663996b3 MS |
3307 | return -ENOMEM; |
3308 | ||
663996b3 MS |
3309 | return 0; |
3310 | } | |
3311 | ||
e842803a MB |
3312 | static int unit_drop_in_file(Unit *u, |
3313 | UnitSetPropertiesMode mode, const char *name, char **p, char **q) { | |
3314 | _cleanup_free_ char *dir = NULL; | |
3315 | int r; | |
3316 | ||
3317 | assert(u); | |
3318 | ||
3319 | r = unit_drop_in_dir(u, mode, u->transient, &dir); | |
3320 | if (r < 0) | |
3321 | return r; | |
3322 | ||
3323 | return drop_in_file(dir, u->id, 50, name, p, q); | |
3324 | } | |
3325 | ||
14228c0d | 3326 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
e842803a | 3327 | |
f47781d8 | 3328 | _cleanup_free_ char *dir = NULL, *p = NULL, *q = NULL; |
663996b3 MS |
3329 | int r; |
3330 | ||
3331 | assert(u); | |
14228c0d | 3332 | |
60f067b4 | 3333 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
14228c0d | 3334 | return 0; |
663996b3 | 3335 | |
e842803a | 3336 | r = unit_drop_in_dir(u, mode, u->transient, &dir); |
663996b3 MS |
3337 | if (r < 0) |
3338 | return r; | |
3339 | ||
f47781d8 MP |
3340 | r = write_drop_in(dir, u->id, 50, name, data); |
3341 | if (r < 0) | |
3342 | return r; | |
3343 | ||
3344 | r = drop_in_file(dir, u->id, 50, name, &p, &q); | |
3345 | if (r < 0) | |
3346 | return r; | |
3347 | ||
3348 | r = strv_extend(&u->dropin_paths, q); | |
3349 | if (r < 0) | |
3350 | return r; | |
3351 | ||
3352 | strv_sort(u->dropin_paths); | |
3353 | strv_uniq(u->dropin_paths); | |
3354 | ||
3355 | u->dropin_mtime = now(CLOCK_REALTIME); | |
3356 | ||
3357 | return 0; | |
663996b3 MS |
3358 | } |
3359 | ||
14228c0d MB |
3360 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3361 | _cleanup_free_ char *p = NULL; | |
3362 | va_list ap; | |
3363 | int r; | |
3364 | ||
3365 | assert(u); | |
3366 | assert(name); | |
3367 | assert(format); | |
3368 | ||
60f067b4 | 3369 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
14228c0d MB |
3370 | return 0; |
3371 | ||
3372 | va_start(ap, format); | |
3373 | r = vasprintf(&p, format, ap); | |
3374 | va_end(ap); | |
3375 | ||
3376 | if (r < 0) | |
3377 | return -ENOMEM; | |
3378 | ||
3379 | return unit_write_drop_in(u, mode, name, p); | |
3380 | } | |
3381 | ||
3382 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
3383 | _cleanup_free_ char *ndata = NULL; | |
3384 | ||
3385 | assert(u); | |
3386 | assert(name); | |
3387 | assert(data); | |
3388 | ||
3389 | if (!UNIT_VTABLE(u)->private_section) | |
3390 | return -EINVAL; | |
3391 | ||
60f067b4 | 3392 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
14228c0d MB |
3393 | return 0; |
3394 | ||
3395 | ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL); | |
3396 | if (!ndata) | |
3397 | return -ENOMEM; | |
3398 | ||
3399 | return unit_write_drop_in(u, mode, name, ndata); | |
3400 | } | |
3401 | ||
3402 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { | |
3403 | _cleanup_free_ char *p = NULL; | |
3404 | va_list ap; | |
3405 | int r; | |
3406 | ||
3407 | assert(u); | |
3408 | assert(name); | |
3409 | assert(format); | |
3410 | ||
60f067b4 | 3411 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
14228c0d MB |
3412 | return 0; |
3413 | ||
3414 | va_start(ap, format); | |
3415 | r = vasprintf(&p, format, ap); | |
3416 | va_end(ap); | |
3417 | ||
3418 | if (r < 0) | |
3419 | return -ENOMEM; | |
3420 | ||
3421 | return unit_write_drop_in_private(u, mode, name, p); | |
3422 | } | |
3423 | ||
3424 | int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) { | |
663996b3 MS |
3425 | _cleanup_free_ char *p = NULL, *q = NULL; |
3426 | int r; | |
3427 | ||
3428 | assert(u); | |
3429 | ||
60f067b4 | 3430 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
14228c0d MB |
3431 | return 0; |
3432 | ||
e842803a | 3433 | r = unit_drop_in_file(u, mode, name, &p, &q); |
60f067b4 JS |
3434 | if (r < 0) |
3435 | return r; | |
3436 | ||
663996b3 | 3437 | if (unlink(q) < 0) |
14228c0d | 3438 | r = errno == ENOENT ? 0 : -errno; |
663996b3 | 3439 | else |
14228c0d | 3440 | r = 1; |
663996b3 MS |
3441 | |
3442 | rmdir(p); | |
3443 | return r; | |
3444 | } | |
3445 | ||
14228c0d MB |
3446 | int unit_make_transient(Unit *u) { |
3447 | int r; | |
3448 | ||
3449 | assert(u); | |
3450 | ||
3451 | u->load_state = UNIT_STUB; | |
3452 | u->load_error = 0; | |
3453 | u->transient = true; | |
3454 | ||
3455 | free(u->fragment_path); | |
3456 | u->fragment_path = NULL; | |
3457 | ||
e3bff60a | 3458 | if (u->manager->running_as == MANAGER_USER) { |
14228c0d MB |
3459 | _cleanup_free_ char *c = NULL; |
3460 | ||
5eef597e | 3461 | r = user_runtime_dir(&c); |
14228c0d MB |
3462 | if (r < 0) |
3463 | return r; | |
3464 | if (r == 0) | |
3465 | return -ENOENT; | |
3466 | ||
3467 | u->fragment_path = strjoin(c, "/", u->id, NULL); | |
3468 | if (!u->fragment_path) | |
3469 | return -ENOMEM; | |
3470 | ||
3471 | mkdir_p(c, 0755); | |
3472 | } else { | |
3473 | u->fragment_path = strappend("/run/systemd/system/", u->id); | |
3474 | if (!u->fragment_path) | |
3475 | return -ENOMEM; | |
3476 | ||
3477 | mkdir_p("/run/systemd/system", 0755); | |
3478 | } | |
3479 | ||
3480 | return write_string_file_atomic_label(u->fragment_path, "# Transient stub"); | |
3481 | } | |
3482 | ||
663996b3 MS |
3483 | int unit_kill_context( |
3484 | Unit *u, | |
3485 | KillContext *c, | |
5eef597e | 3486 | KillOperation k, |
663996b3 MS |
3487 | pid_t main_pid, |
3488 | pid_t control_pid, | |
3489 | bool main_pid_alien) { | |
3490 | ||
60f067b4 | 3491 | int sig, wait_for_exit = false, r; |
663996b3 MS |
3492 | |
3493 | assert(u); | |
3494 | assert(c); | |
3495 | ||
3496 | if (c->kill_mode == KILL_NONE) | |
3497 | return 0; | |
3498 | ||
5eef597e MP |
3499 | switch (k) { |
3500 | case KILL_KILL: | |
3501 | sig = SIGKILL; | |
3502 | break; | |
3503 | case KILL_ABORT: | |
3504 | sig = SIGABRT; | |
3505 | break; | |
3506 | case KILL_TERMINATE: | |
3507 | sig = c->kill_signal; | |
3508 | break; | |
3509 | default: | |
3510 | assert_not_reached("KillOperation unknown"); | |
3511 | } | |
663996b3 MS |
3512 | |
3513 | if (main_pid > 0) { | |
3514 | r = kill_and_sigcont(main_pid, sig); | |
3515 | ||
3516 | if (r < 0 && r != -ESRCH) { | |
3517 | _cleanup_free_ char *comm = NULL; | |
3518 | get_process_comm(main_pid, &comm); | |
3519 | ||
e3bff60a | 3520 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s): %m", main_pid, strna(comm)); |
14228c0d | 3521 | } else { |
60f067b4 JS |
3522 | if (!main_pid_alien) |
3523 | wait_for_exit = true; | |
14228c0d | 3524 | |
5eef597e | 3525 | if (c->send_sighup && k != KILL_KILL) |
14228c0d MB |
3526 | kill(main_pid, SIGHUP); |
3527 | } | |
663996b3 MS |
3528 | } |
3529 | ||
3530 | if (control_pid > 0) { | |
3531 | r = kill_and_sigcont(control_pid, sig); | |
3532 | ||
3533 | if (r < 0 && r != -ESRCH) { | |
3534 | _cleanup_free_ char *comm = NULL; | |
3535 | get_process_comm(control_pid, &comm); | |
3536 | ||
e3bff60a | 3537 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s): %m", control_pid, strna(comm)); |
14228c0d | 3538 | } else { |
663996b3 | 3539 | wait_for_exit = true; |
14228c0d | 3540 | |
5eef597e | 3541 | if (c->send_sighup && k != KILL_KILL) |
14228c0d MB |
3542 | kill(control_pid, SIGHUP); |
3543 | } | |
663996b3 MS |
3544 | } |
3545 | ||
5eef597e | 3546 | if ((c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL)) && u->cgroup_path) { |
663996b3 MS |
3547 | _cleanup_set_free_ Set *pid_set = NULL; |
3548 | ||
14228c0d MB |
3549 | /* Exclude the main/control pids from being killed via the cgroup */ |
3550 | pid_set = unit_pid_set(main_pid, control_pid); | |
663996b3 MS |
3551 | if (!pid_set) |
3552 | return -ENOMEM; | |
3553 | ||
14228c0d | 3554 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, true, false, pid_set); |
663996b3 MS |
3555 | if (r < 0) { |
3556 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
e3bff60a | 3557 | log_unit_warning_errno(u, r, "Failed to kill control group: %m"); |
14228c0d | 3558 | } else if (r > 0) { |
60f067b4 JS |
3559 | |
3560 | /* FIXME: For now, we will not wait for the | |
3561 | * cgroup members to die, simply because | |
3562 | * cgroup notification is unreliable. It | |
3563 | * doesn't work at all in containers, and | |
3564 | * outside of containers it can be confused | |
3565 | * easily by leaving directories in the | |
3566 | * cgroup. */ | |
3567 | ||
3568 | /* wait_for_exit = true; */ | |
3569 | ||
5eef597e | 3570 | if (c->send_sighup && k != KILL_KILL) { |
14228c0d MB |
3571 | set_free(pid_set); |
3572 | ||
3573 | pid_set = unit_pid_set(main_pid, control_pid); | |
3574 | if (!pid_set) | |
3575 | return -ENOMEM; | |
3576 | ||
60f067b4 | 3577 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, false, true, false, pid_set); |
14228c0d MB |
3578 | } |
3579 | } | |
663996b3 MS |
3580 | } |
3581 | ||
3582 | return wait_for_exit; | |
3583 | } | |
3584 | ||
14228c0d MB |
3585 | int unit_require_mounts_for(Unit *u, const char *path) { |
3586 | char prefix[strlen(path) + 1], *p; | |
3587 | int r; | |
3588 | ||
3589 | assert(u); | |
3590 | assert(path); | |
3591 | ||
3592 | /* Registers a unit for requiring a certain path and all its | |
3593 | * prefixes. We keep a simple array of these paths in the | |
3594 | * unit, since its usually short. However, we build a prefix | |
3595 | * table for all possible prefixes so that new appearing mount | |
3596 | * units can easily determine which units to make themselves a | |
3597 | * dependency of. */ | |
3598 | ||
60f067b4 JS |
3599 | if (!path_is_absolute(path)) |
3600 | return -EINVAL; | |
3601 | ||
14228c0d MB |
3602 | p = strdup(path); |
3603 | if (!p) | |
3604 | return -ENOMEM; | |
3605 | ||
3606 | path_kill_slashes(p); | |
3607 | ||
14228c0d MB |
3608 | if (!path_is_safe(p)) { |
3609 | free(p); | |
3610 | return -EPERM; | |
3611 | } | |
3612 | ||
3613 | if (strv_contains(u->requires_mounts_for, p)) { | |
3614 | free(p); | |
3615 | return 0; | |
3616 | } | |
3617 | ||
60f067b4 JS |
3618 | r = strv_consume(&u->requires_mounts_for, p); |
3619 | if (r < 0) | |
14228c0d | 3620 | return r; |
14228c0d MB |
3621 | |
3622 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
3623 | Set *x; | |
3624 | ||
3625 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
3626 | if (!x) { | |
3627 | char *q; | |
3628 | ||
e3bff60a MP |
3629 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &string_hash_ops); |
3630 | if (r < 0) | |
3631 | return r; | |
14228c0d MB |
3632 | |
3633 | q = strdup(prefix); | |
3634 | if (!q) | |
3635 | return -ENOMEM; | |
3636 | ||
5eef597e | 3637 | x = set_new(NULL); |
14228c0d MB |
3638 | if (!x) { |
3639 | free(q); | |
3640 | return -ENOMEM; | |
3641 | } | |
3642 | ||
3643 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
3644 | if (r < 0) { | |
3645 | free(q); | |
3646 | set_free(x); | |
3647 | return r; | |
3648 | } | |
3649 | } | |
3650 | ||
3651 | r = set_put(x, u); | |
3652 | if (r < 0) | |
3653 | return r; | |
3654 | } | |
3655 | ||
3656 | return 0; | |
3657 | } | |
3658 | ||
60f067b4 JS |
3659 | int unit_setup_exec_runtime(Unit *u) { |
3660 | ExecRuntime **rt; | |
3661 | size_t offset; | |
3662 | Iterator i; | |
3663 | Unit *other; | |
3664 | ||
3665 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3666 | assert(offset > 0); | |
3667 | ||
5eef597e | 3668 | /* Check if there already is an ExecRuntime for this unit? */ |
60f067b4 JS |
3669 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
3670 | if (*rt) | |
3671 | return 0; | |
3672 | ||
3673 | /* Try to get it from somebody else */ | |
3674 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
3675 | ||
3676 | *rt = unit_get_exec_runtime(other); | |
3677 | if (*rt) { | |
3678 | exec_runtime_ref(*rt); | |
3679 | return 0; | |
3680 | } | |
3681 | } | |
3682 | ||
3683 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
3684 | } | |
3685 | ||
e3bff60a MP |
3686 | bool unit_type_supported(UnitType t) { |
3687 | if (_unlikely_(t < 0)) | |
3688 | return false; | |
3689 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
3690 | return false; | |
3691 | ||
3692 | if (!unit_vtable[t]->supported) | |
3693 | return true; | |
3694 | ||
3695 | return unit_vtable[t]->supported(); | |
3696 | } | |
3697 | ||
3698 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { | |
3699 | int r; | |
3700 | ||
3701 | assert(u); | |
3702 | assert(where); | |
3703 | ||
3704 | r = dir_is_empty(where); | |
3705 | if (r > 0) | |
3706 | return; | |
3707 | if (r < 0) { | |
3708 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
3709 | return; | |
3710 | } | |
3711 | ||
3712 | log_struct(LOG_NOTICE, | |
3713 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3714 | LOG_UNIT_ID(u), | |
3715 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
3716 | "WHERE=%s", where, | |
3717 | NULL); | |
3718 | } | |
3719 | ||
3720 | int unit_fail_if_symlink(Unit *u, const char* where) { | |
3721 | int r; | |
3722 | ||
3723 | assert(u); | |
3724 | assert(where); | |
3725 | ||
3726 | r = is_symlink(where); | |
3727 | if (r < 0) { | |
3728 | log_unit_debug_errno(u, r, "Failed to check symlink %s, ignoring: %m", where); | |
3729 | return 0; | |
3730 | } | |
3731 | if (r == 0) | |
3732 | return 0; | |
3733 | ||
3734 | log_struct(LOG_ERR, | |
3735 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3736 | LOG_UNIT_ID(u), | |
3737 | LOG_UNIT_MESSAGE(u, "Mount on symlink %s not allowed.", where), | |
3738 | "WHERE=%s", where, | |
3739 | NULL); | |
3740 | ||
3741 | return -ELOOP; | |
3742 | } | |
3743 | ||
663996b3 MS |
3744 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
3745 | [UNIT_ACTIVE] = "active", | |
3746 | [UNIT_RELOADING] = "reloading", | |
3747 | [UNIT_INACTIVE] = "inactive", | |
3748 | [UNIT_FAILED] = "failed", | |
3749 | [UNIT_ACTIVATING] = "activating", | |
3750 | [UNIT_DEACTIVATING] = "deactivating" | |
3751 | }; | |
3752 | ||
3753 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); |