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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
87f0e418 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
87f0e418 LP |
22 | #include <errno.h> |
23 | #include <string.h> | |
0301abf4 LP |
24 | #include <stdlib.h> |
25 | #include <unistd.h> | |
45fb0699 | 26 | #include <sys/stat.h> |
87f0e418 | 27 | |
718db961 LP |
28 | #include "sd-id128.h" |
29 | #include "sd-messages.h" | |
87f0e418 LP |
30 | #include "set.h" |
31 | #include "unit.h" | |
32 | #include "macro.h" | |
33 | #include "strv.h" | |
9eb977db | 34 | #include "path-util.h" |
87f0e418 LP |
35 | #include "load-fragment.h" |
36 | #include "load-dropin.h" | |
37 | #include "log.h" | |
9e2f7c11 | 38 | #include "unit-name.h" |
4139c1b2 | 39 | #include "dbus-unit.h" |
514f4ef5 | 40 | #include "special.h" |
c6c18be3 | 41 | #include "cgroup-util.h" |
4927fcae | 42 | #include "missing.h" |
71645aca | 43 | #include "mkdir.h" |
a5c32cff | 44 | #include "fileio-label.h" |
96aad8d1 | 45 | #include "bus-common-errors.h" |
718db961 | 46 | #include "dbus.h" |
613b411c | 47 | #include "execute.h" |
29686440 | 48 | #include "dropin.h" |
87f0e418 LP |
49 | |
50 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
51 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 | 52 | [UNIT_SOCKET] = &socket_vtable, |
e821075a | 53 | [UNIT_BUSNAME] = &busname_vtable, |
87f0e418 | 54 | [UNIT_TARGET] = &target_vtable, |
e821075a | 55 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
87f0e418 LP |
56 | [UNIT_DEVICE] = &device_vtable, |
57 | [UNIT_MOUNT] = &mount_vtable, | |
58 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 59 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 60 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 61 | [UNIT_PATH] = &path_vtable, |
6c12b52e LP |
62 | [UNIT_SLICE] = &slice_vtable, |
63 | [UNIT_SCOPE] = &scope_vtable | |
87f0e418 LP |
64 | }; |
65 | ||
d1fab3fe ZJS |
66 | static int maybe_warn_about_dependency(const char *id, const char *other, UnitDependency dependency); |
67 | ||
7d17cfbc | 68 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
69 | Unit *u; |
70 | ||
71 | assert(m); | |
ac155bb8 | 72 | assert(size >= sizeof(Unit)); |
87f0e418 | 73 | |
7d17cfbc MS |
74 | u = malloc0(size); |
75 | if (!u) | |
87f0e418 LP |
76 | return NULL; |
77 | ||
d5099efc | 78 | u->names = set_new(&string_hash_ops); |
ac155bb8 | 79 | if (!u->names) { |
87f0e418 LP |
80 | free(u); |
81 | return NULL; | |
82 | } | |
83 | ||
ac155bb8 MS |
84 | u->manager = m; |
85 | u->type = _UNIT_TYPE_INVALID; | |
86 | u->deserialized_job = _JOB_TYPE_INVALID; | |
87 | u->default_dependencies = true; | |
88 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 89 | u->unit_file_preset = -1; |
d420282b | 90 | u->on_failure_job_mode = JOB_REPLACE; |
87f0e418 LP |
91 | |
92 | return u; | |
93 | } | |
94 | ||
f278026d LP |
95 | bool unit_has_name(Unit *u, const char *name) { |
96 | assert(u); | |
97 | assert(name); | |
98 | ||
ac155bb8 | 99 | return !!set_get(u->names, (char*) name); |
f278026d LP |
100 | } |
101 | ||
598459ce LP |
102 | static void unit_init(Unit *u) { |
103 | CGroupContext *cc; | |
104 | ExecContext *ec; | |
105 | KillContext *kc; | |
106 | ||
107 | assert(u); | |
108 | assert(u->manager); | |
109 | assert(u->type >= 0); | |
110 | ||
111 | cc = unit_get_cgroup_context(u); | |
112 | if (cc) { | |
113 | cgroup_context_init(cc); | |
114 | ||
115 | /* Copy in the manager defaults into the cgroup | |
116 | * context, _before_ the rest of the settings have | |
117 | * been initialized */ | |
118 | ||
119 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
120 | cc->blockio_accounting = u->manager->default_blockio_accounting; | |
121 | cc->memory_accounting = u->manager->default_memory_accounting; | |
122 | } | |
123 | ||
124 | ec = unit_get_exec_context(u); | |
125 | if (ec) | |
126 | exec_context_init(ec); | |
127 | ||
128 | kc = unit_get_kill_context(u); | |
129 | if (kc) | |
130 | kill_context_init(kc); | |
131 | ||
132 | if (UNIT_VTABLE(u)->init) | |
133 | UNIT_VTABLE(u)->init(u); | |
134 | } | |
135 | ||
87f0e418 | 136 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 137 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 138 | UnitType t; |
87f0e418 LP |
139 | int r; |
140 | ||
141 | assert(u); | |
142 | assert(text); | |
143 | ||
9e2f7c11 | 144 | if (unit_name_is_template(text)) { |
598459ce | 145 | |
ac155bb8 | 146 | if (!u->instance) |
9e2f7c11 | 147 | return -EINVAL; |
87f0e418 | 148 | |
ac155bb8 | 149 | s = unit_name_replace_instance(text, u->instance); |
9e2f7c11 LP |
150 | } else |
151 | s = strdup(text); | |
9e2f7c11 LP |
152 | if (!s) |
153 | return -ENOMEM; | |
87f0e418 | 154 | |
598459ce LP |
155 | if (!unit_name_is_valid(s, TEMPLATE_INVALID)) |
156 | return -EINVAL; | |
e537352b | 157 | |
9e2f7c11 | 158 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 159 | |
598459ce LP |
160 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
161 | return -EINVAL; | |
87f0e418 | 162 | |
e48614c4 ZJS |
163 | r = unit_name_to_instance(s, &i); |
164 | if (r < 0) | |
598459ce | 165 | return r; |
87f0e418 | 166 | |
598459ce LP |
167 | if (i && unit_vtable[t]->no_instances) |
168 | return -EINVAL; | |
9e2f7c11 | 169 | |
276c3e78 LP |
170 | /* Ensure that this unit is either instanced or not instanced, |
171 | * but not both. */ | |
598459ce LP |
172 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
173 | return -EINVAL; | |
9e2f7c11 LP |
174 | |
175 | if (unit_vtable[t]->no_alias && | |
ac155bb8 | 176 | !set_isempty(u->names) && |
598459ce LP |
177 | !set_get(u->names, s)) |
178 | return -EEXIST; | |
9e2f7c11 | 179 | |
598459ce LP |
180 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
181 | return -E2BIG; | |
4f0f902f | 182 | |
e48614c4 ZJS |
183 | r = set_put(u->names, s); |
184 | if (r < 0) { | |
9e2f7c11 | 185 | if (r == -EEXIST) |
598459ce LP |
186 | return 0; |
187 | ||
188 | return r; | |
87f0e418 LP |
189 | } |
190 | ||
e48614c4 ZJS |
191 | r = hashmap_put(u->manager->units, s, u); |
192 | if (r < 0) { | |
ac155bb8 | 193 | set_remove(u->names, s); |
598459ce | 194 | return r; |
87f0e418 LP |
195 | } |
196 | ||
ac155bb8 | 197 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
198 | u->type = t; |
199 | u->id = s; | |
200 | u->instance = i; | |
9e2f7c11 | 201 | |
71fda00f | 202 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 203 | |
598459ce | 204 | unit_init(u); |
87f0e418 | 205 | |
598459ce LP |
206 | i = NULL; |
207 | } | |
9e2f7c11 | 208 | |
598459ce | 209 | s = NULL; |
9e2f7c11 | 210 | |
598459ce LP |
211 | unit_add_to_dbus_queue(u); |
212 | return 0; | |
87f0e418 LP |
213 | } |
214 | ||
0ae97ec1 | 215 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 216 | _cleanup_free_ char *t = NULL; |
598459ce | 217 | char *s, *i; |
276c3e78 | 218 | int r; |
0ae97ec1 LP |
219 | |
220 | assert(u); | |
221 | assert(name); | |
222 | ||
9e2f7c11 LP |
223 | if (unit_name_is_template(name)) { |
224 | ||
ac155bb8 | 225 | if (!u->instance) |
9e2f7c11 LP |
226 | return -EINVAL; |
227 | ||
e48614c4 ZJS |
228 | t = unit_name_replace_instance(name, u->instance); |
229 | if (!t) | |
9e2f7c11 LP |
230 | return -ENOMEM; |
231 | ||
232 | name = t; | |
233 | } | |
234 | ||
0ae97ec1 | 235 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 236 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 237 | if (!s) |
0ae97ec1 LP |
238 | return -ENOENT; |
239 | ||
e48614c4 ZJS |
240 | r = unit_name_to_instance(s, &i); |
241 | if (r < 0) | |
276c3e78 LP |
242 | return r; |
243 | ||
ac155bb8 | 244 | u->id = s; |
276c3e78 | 245 | |
ac155bb8 MS |
246 | free(u->instance); |
247 | u->instance = i; | |
276c3e78 | 248 | |
c1e1601e | 249 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 250 | |
0ae97ec1 LP |
251 | return 0; |
252 | } | |
253 | ||
f50e0a01 LP |
254 | int unit_set_description(Unit *u, const char *description) { |
255 | char *s; | |
256 | ||
257 | assert(u); | |
258 | ||
8aec412f LP |
259 | if (isempty(description)) |
260 | s = NULL; | |
261 | else { | |
262 | s = strdup(description); | |
263 | if (!s) | |
264 | return -ENOMEM; | |
265 | } | |
f50e0a01 | 266 | |
ac155bb8 MS |
267 | free(u->description); |
268 | u->description = s; | |
c1e1601e LP |
269 | |
270 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
271 | return 0; |
272 | } | |
273 | ||
701cc384 | 274 | bool unit_check_gc(Unit *u) { |
a354329f | 275 | UnitActiveState state; |
701cc384 LP |
276 | assert(u); |
277 | ||
a354329f | 278 | if (u->job) |
701cc384 LP |
279 | return true; |
280 | ||
a354329f | 281 | if (u->nop_job) |
6c073082 LP |
282 | return true; |
283 | ||
a354329f LP |
284 | state = unit_active_state(u); |
285 | ||
286 | /* If the unit is inactive and failed and no job is queued for | |
287 | * it, then release its runtime resources */ | |
288 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && | |
289 | UNIT_VTABLE(u)->release_resources) | |
290 | UNIT_VTABLE(u)->release_resources(u); | |
291 | ||
292 | /* But we keep the unit object around for longer when it is | |
293 | * referenced or configured to not be gc'ed */ | |
294 | if (state != UNIT_INACTIVE) | |
701cc384 LP |
295 | return true; |
296 | ||
a354329f | 297 | if (UNIT_VTABLE(u)->no_gc) |
e0209d83 MS |
298 | return true; |
299 | ||
a354329f | 300 | if (u->no_gc) |
701cc384 LP |
301 | return true; |
302 | ||
9d576438 LP |
303 | if (u->refs) |
304 | return true; | |
305 | ||
701cc384 LP |
306 | if (UNIT_VTABLE(u)->check_gc) |
307 | if (UNIT_VTABLE(u)->check_gc(u)) | |
308 | return true; | |
309 | ||
310 | return false; | |
311 | } | |
312 | ||
87f0e418 LP |
313 | void unit_add_to_load_queue(Unit *u) { |
314 | assert(u); | |
ac155bb8 | 315 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 316 | |
ac155bb8 | 317 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
318 | return; |
319 | ||
71fda00f | 320 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 321 | u->in_load_queue = true; |
87f0e418 LP |
322 | } |
323 | ||
23a177ef LP |
324 | void unit_add_to_cleanup_queue(Unit *u) { |
325 | assert(u); | |
326 | ||
ac155bb8 | 327 | if (u->in_cleanup_queue) |
23a177ef LP |
328 | return; |
329 | ||
71fda00f | 330 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 331 | u->in_cleanup_queue = true; |
23a177ef LP |
332 | } |
333 | ||
701cc384 LP |
334 | void unit_add_to_gc_queue(Unit *u) { |
335 | assert(u); | |
336 | ||
ac155bb8 | 337 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
338 | return; |
339 | ||
340 | if (unit_check_gc(u)) | |
341 | return; | |
342 | ||
71fda00f | 343 | LIST_PREPEND(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 344 | u->in_gc_queue = true; |
701cc384 | 345 | |
ac155bb8 | 346 | u->manager->n_in_gc_queue ++; |
701cc384 LP |
347 | } |
348 | ||
c1e1601e LP |
349 | void unit_add_to_dbus_queue(Unit *u) { |
350 | assert(u); | |
ac155bb8 | 351 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 352 | |
ac155bb8 | 353 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
354 | return; |
355 | ||
a567261a | 356 | /* Shortcut things if nobody cares */ |
8f8f05a9 LP |
357 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
358 | set_isempty(u->manager->private_buses)) { | |
ac155bb8 | 359 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
360 | return; |
361 | } | |
362 | ||
71fda00f | 363 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 364 | u->in_dbus_queue = true; |
c1e1601e LP |
365 | } |
366 | ||
87f0e418 LP |
367 | static void bidi_set_free(Unit *u, Set *s) { |
368 | Iterator i; | |
369 | Unit *other; | |
370 | ||
371 | assert(u); | |
372 | ||
373 | /* Frees the set and makes sure we are dropped from the | |
374 | * inverse pointers */ | |
375 | ||
376 | SET_FOREACH(other, s, i) { | |
377 | UnitDependency d; | |
378 | ||
379 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 380 | set_remove(other->dependencies[d], u); |
701cc384 LP |
381 | |
382 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
383 | } |
384 | ||
385 | set_free(s); | |
386 | } | |
387 | ||
c2756a68 LP |
388 | static void unit_remove_transient(Unit *u) { |
389 | char **i; | |
390 | ||
391 | assert(u); | |
392 | ||
393 | if (!u->transient) | |
394 | return; | |
395 | ||
396 | if (u->fragment_path) | |
397 | unlink(u->fragment_path); | |
398 | ||
399 | STRV_FOREACH(i, u->dropin_paths) { | |
400 | _cleanup_free_ char *p = NULL; | |
401 | int r; | |
402 | ||
403 | unlink(*i); | |
404 | ||
405 | r = path_get_parent(*i, &p); | |
406 | if (r >= 0) | |
407 | rmdir(p); | |
408 | } | |
409 | } | |
410 | ||
a57f7e2c LP |
411 | static void unit_free_requires_mounts_for(Unit *u) { |
412 | char **j; | |
413 | ||
414 | STRV_FOREACH(j, u->requires_mounts_for) { | |
415 | char s[strlen(*j) + 1]; | |
416 | ||
417 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
418 | char *y; | |
419 | Set *x; | |
420 | ||
421 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
422 | if (!x) | |
423 | continue; | |
424 | ||
425 | set_remove(x, u); | |
426 | ||
427 | if (set_isempty(x)) { | |
428 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
429 | free(y); | |
430 | set_free(x); | |
431 | } | |
432 | } | |
433 | } | |
434 | ||
435 | strv_free(u->requires_mounts_for); | |
436 | u->requires_mounts_for = NULL; | |
437 | } | |
438 | ||
598459ce LP |
439 | static void unit_done(Unit *u) { |
440 | ExecContext *ec; | |
441 | CGroupContext *cc; | |
442 | ||
443 | assert(u); | |
444 | ||
445 | if (u->type < 0) | |
446 | return; | |
447 | ||
448 | if (UNIT_VTABLE(u)->done) | |
449 | UNIT_VTABLE(u)->done(u); | |
450 | ||
451 | ec = unit_get_exec_context(u); | |
452 | if (ec) | |
453 | exec_context_done(ec); | |
454 | ||
455 | cc = unit_get_cgroup_context(u); | |
456 | if (cc) | |
457 | cgroup_context_done(cc); | |
458 | } | |
459 | ||
87f0e418 LP |
460 | void unit_free(Unit *u) { |
461 | UnitDependency d; | |
462 | Iterator i; | |
463 | char *t; | |
464 | ||
465 | assert(u); | |
466 | ||
c2756a68 LP |
467 | if (u->manager->n_reloading <= 0) |
468 | unit_remove_transient(u); | |
469 | ||
c1e1601e LP |
470 | bus_unit_send_removed_signal(u); |
471 | ||
598459ce | 472 | unit_done(u); |
a013b84b | 473 | |
a57f7e2c LP |
474 | unit_free_requires_mounts_for(u); |
475 | ||
ac155bb8 MS |
476 | SET_FOREACH(t, u->names, i) |
477 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 478 | |
97e7d748 MS |
479 | if (u->job) { |
480 | Job *j = u->job; | |
481 | job_uninstall(j); | |
482 | job_free(j); | |
483 | } | |
964e0949 | 484 | |
e0209d83 MS |
485 | if (u->nop_job) { |
486 | Job *j = u->nop_job; | |
487 | job_uninstall(j); | |
488 | job_free(j); | |
489 | } | |
490 | ||
964e0949 | 491 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 492 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 493 | |
ac155bb8 | 494 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 495 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 496 | |
ac155bb8 | 497 | if (u->in_load_queue) |
71fda00f | 498 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 499 | |
ac155bb8 | 500 | if (u->in_dbus_queue) |
71fda00f | 501 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 502 | |
ac155bb8 | 503 | if (u->in_cleanup_queue) |
71fda00f | 504 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 505 | |
ac155bb8 | 506 | if (u->in_gc_queue) { |
71fda00f | 507 | LIST_REMOVE(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 508 | u->manager->n_in_gc_queue--; |
701cc384 LP |
509 | } |
510 | ||
4ad49000 | 511 | if (u->in_cgroup_queue) |
71fda00f | 512 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
87f0e418 | 513 | |
72673e86 LP |
514 | if (u->cgroup_path) { |
515 | hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
516 | free(u->cgroup_path); | |
517 | } | |
518 | ||
f755e3b7 | 519 | set_remove(u->manager->failed_units, u); |
db785129 | 520 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 521 | |
ac155bb8 | 522 | free(u->description); |
49dbfa7b | 523 | strv_free(u->documentation); |
ac155bb8 | 524 | free(u->fragment_path); |
1b64d026 | 525 | free(u->source_path); |
ae7a7182 | 526 | strv_free(u->dropin_paths); |
ac155bb8 | 527 | free(u->instance); |
87f0e418 | 528 | |
f189ab18 LP |
529 | free(u->job_timeout_reboot_arg); |
530 | ||
ac155bb8 | 531 | set_free_free(u->names); |
87f0e418 | 532 | |
a911bb9a LP |
533 | unit_unwatch_all_pids(u); |
534 | ||
ac155bb8 | 535 | condition_free_list(u->conditions); |
59fccdc5 | 536 | condition_free_list(u->asserts); |
52661efd | 537 | |
702a2d8f LP |
538 | unit_ref_unset(&u->slice); |
539 | ||
ac155bb8 MS |
540 | while (u->refs) |
541 | unit_ref_unset(u->refs); | |
57020a3a | 542 | |
87f0e418 LP |
543 | free(u); |
544 | } | |
545 | ||
546 | UnitActiveState unit_active_state(Unit *u) { | |
547 | assert(u); | |
548 | ||
ac155bb8 | 549 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
550 | return unit_active_state(unit_follow_merge(u)); |
551 | ||
552 | /* After a reload it might happen that a unit is not correctly | |
553 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 554 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
555 | |
556 | return UNIT_VTABLE(u)->active_state(u); | |
557 | } | |
558 | ||
10a94420 LP |
559 | const char* unit_sub_state_to_string(Unit *u) { |
560 | assert(u); | |
561 | ||
562 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
563 | } | |
564 | ||
7c0b05e5 MS |
565 | static int complete_move(Set **s, Set **other) { |
566 | int r; | |
567 | ||
23a177ef LP |
568 | assert(s); |
569 | assert(other); | |
87f0e418 | 570 | |
23a177ef | 571 | if (!*other) |
7c0b05e5 | 572 | return 0; |
87f0e418 | 573 | |
7c0b05e5 MS |
574 | if (*s) { |
575 | r = set_move(*s, *other); | |
576 | if (r < 0) | |
577 | return r; | |
578 | } else { | |
23a177ef LP |
579 | *s = *other; |
580 | *other = NULL; | |
581 | } | |
7c0b05e5 MS |
582 | |
583 | return 0; | |
23a177ef | 584 | } |
87f0e418 | 585 | |
7c0b05e5 | 586 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
587 | char *t; |
588 | Iterator i; | |
7c0b05e5 | 589 | int r; |
87f0e418 | 590 | |
23a177ef LP |
591 | assert(u); |
592 | assert(other); | |
593 | ||
7c0b05e5 MS |
594 | r = complete_move(&u->names, &other->names); |
595 | if (r < 0) | |
596 | return r; | |
23a177ef | 597 | |
ac155bb8 MS |
598 | set_free_free(other->names); |
599 | other->names = NULL; | |
600 | other->id = NULL; | |
23a177ef | 601 | |
ac155bb8 MS |
602 | SET_FOREACH(t, u->names, i) |
603 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
604 | |
605 | return 0; | |
87f0e418 LP |
606 | } |
607 | ||
09a65f92 MS |
608 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
609 | unsigned n_reserve; | |
610 | ||
611 | assert(u); | |
612 | assert(other); | |
613 | assert(d < _UNIT_DEPENDENCY_MAX); | |
614 | ||
615 | /* | |
616 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 617 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
618 | * as a whole to u by complete_move(). |
619 | */ | |
620 | if (!u->dependencies[d]) | |
621 | return 0; | |
622 | ||
623 | /* merge_dependencies() will skip a u-on-u dependency */ | |
624 | n_reserve = set_size(other->dependencies[d]) - !!set_get(other->dependencies[d], u); | |
625 | ||
626 | return set_reserve(u->dependencies[d], n_reserve); | |
627 | } | |
628 | ||
d1fab3fe | 629 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
630 | Iterator i; |
631 | Unit *back; | |
87f0e418 | 632 | int r; |
23a177ef LP |
633 | |
634 | assert(u); | |
635 | assert(other); | |
636 | assert(d < _UNIT_DEPENDENCY_MAX); | |
637 | ||
83a95334 | 638 | /* Fix backwards pointers */ |
ac155bb8 | 639 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
640 | UnitDependency k; |
641 | ||
e48614c4 | 642 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff ZJS |
643 | /* Do not add dependencies between u and itself */ |
644 | if (back == u) { | |
d1fab3fe ZJS |
645 | if (set_remove(back->dependencies[k], other)) |
646 | maybe_warn_about_dependency(u->id, other_id, k); | |
e66047ff ZJS |
647 | } else { |
648 | r = set_remove_and_put(back->dependencies[k], other, u); | |
649 | if (r == -EEXIST) | |
650 | set_remove(back->dependencies[k], other); | |
651 | else | |
652 | assert(r >= 0 || r == -ENOENT); | |
653 | } | |
e48614c4 | 654 | } |
23a177ef LP |
655 | } |
656 | ||
e66047ff | 657 | /* Also do not move dependencies on u to itself */ |
d1fab3fe ZJS |
658 | back = set_remove(other->dependencies[d], u); |
659 | if (back) | |
660 | maybe_warn_about_dependency(u->id, other_id, d); | |
e66047ff | 661 | |
7c0b05e5 MS |
662 | /* The move cannot fail. The caller must have performed a reservation. */ |
663 | assert_se(complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); | |
23a177ef | 664 | |
ac155bb8 MS |
665 | set_free(other->dependencies[d]); |
666 | other->dependencies[d] = NULL; | |
23a177ef LP |
667 | } |
668 | ||
669 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 670 | UnitDependency d; |
d1fab3fe | 671 | const char *other_id = NULL; |
09a65f92 | 672 | int r; |
87f0e418 LP |
673 | |
674 | assert(u); | |
675 | assert(other); | |
ac155bb8 MS |
676 | assert(u->manager == other->manager); |
677 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 678 | |
cc916967 LP |
679 | other = unit_follow_merge(other); |
680 | ||
23a177ef LP |
681 | if (other == u) |
682 | return 0; | |
683 | ||
ac155bb8 | 684 | if (u->type != other->type) |
9e2f7c11 LP |
685 | return -EINVAL; |
686 | ||
ac155bb8 | 687 | if (!u->instance != !other->instance) |
87f0e418 LP |
688 | return -EINVAL; |
689 | ||
ac155bb8 | 690 | if (other->load_state != UNIT_STUB && |
c2756a68 | 691 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 692 | return -EEXIST; |
87f0e418 | 693 | |
ac155bb8 | 694 | if (other->job) |
819e213f LP |
695 | return -EEXIST; |
696 | ||
e0209d83 MS |
697 | if (other->nop_job) |
698 | return -EEXIST; | |
699 | ||
fdf20a31 | 700 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
701 | return -EEXIST; |
702 | ||
d1fab3fe ZJS |
703 | if (other->id) |
704 | other_id = strdupa(other->id); | |
705 | ||
09a65f92 MS |
706 | /* Make reservations to ensure merge_dependencies() won't fail */ |
707 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
708 | r = reserve_dependencies(u, other, d); | |
709 | /* | |
710 | * We don't rollback reservations if we fail. We don't have | |
711 | * a way to undo reservations. A reservation is not a leak. | |
712 | */ | |
713 | if (r < 0) | |
714 | return r; | |
715 | } | |
716 | ||
87f0e418 | 717 | /* Merge names */ |
7c0b05e5 MS |
718 | r = merge_names(u, other); |
719 | if (r < 0) | |
720 | return r; | |
87f0e418 | 721 | |
57020a3a | 722 | /* Redirect all references */ |
ac155bb8 MS |
723 | while (other->refs) |
724 | unit_ref_set(other->refs, u); | |
57020a3a | 725 | |
87f0e418 LP |
726 | /* Merge dependencies */ |
727 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 728 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 729 | |
ac155bb8 MS |
730 | other->load_state = UNIT_MERGED; |
731 | other->merged_into = u; | |
23a177ef | 732 | |
3616a49c LP |
733 | /* If there is still some data attached to the other node, we |
734 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 735 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
736 | if (UNIT_VTABLE(other)->done) |
737 | UNIT_VTABLE(other)->done(other); | |
738 | ||
739 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
740 | unit_add_to_cleanup_queue(other); |
741 | ||
742 | return 0; | |
743 | } | |
744 | ||
745 | int unit_merge_by_name(Unit *u, const char *name) { | |
746 | Unit *other; | |
9e2f7c11 | 747 | int r; |
68eda4bd | 748 | _cleanup_free_ char *s = NULL; |
23a177ef LP |
749 | |
750 | assert(u); | |
751 | assert(name); | |
752 | ||
9e2f7c11 | 753 | if (unit_name_is_template(name)) { |
ac155bb8 | 754 | if (!u->instance) |
9e2f7c11 LP |
755 | return -EINVAL; |
756 | ||
e48614c4 ZJS |
757 | s = unit_name_replace_instance(name, u->instance); |
758 | if (!s) | |
9e2f7c11 LP |
759 | return -ENOMEM; |
760 | ||
761 | name = s; | |
762 | } | |
763 | ||
c2756a68 LP |
764 | other = manager_get_unit(u->manager, name); |
765 | if (!other) | |
9e2f7c11 LP |
766 | r = unit_add_name(u, name); |
767 | else | |
768 | r = unit_merge(u, other); | |
23a177ef | 769 | |
9e2f7c11 | 770 | return r; |
23a177ef LP |
771 | } |
772 | ||
773 | Unit* unit_follow_merge(Unit *u) { | |
774 | assert(u); | |
775 | ||
ac155bb8 MS |
776 | while (u->load_state == UNIT_MERGED) |
777 | assert_se(u = u->merged_into); | |
23a177ef LP |
778 | |
779 | return u; | |
780 | } | |
781 | ||
782 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
783 | int r; | |
784 | ||
785 | assert(u); | |
786 | assert(c); | |
787 | ||
36be24c8 ZJS |
788 | if (c->working_directory) { |
789 | r = unit_require_mounts_for(u, c->working_directory); | |
790 | if (r < 0) | |
791 | return r; | |
792 | } | |
793 | ||
794 | if (c->root_directory) { | |
795 | r = unit_require_mounts_for(u, c->root_directory); | |
796 | if (r < 0) | |
797 | return r; | |
798 | } | |
799 | ||
b46a529c LP |
800 | if (u->manager->running_as != SYSTEMD_SYSTEM) |
801 | return 0; | |
802 | ||
803 | if (c->private_tmp) { | |
804 | r = unit_require_mounts_for(u, "/tmp"); | |
805 | if (r < 0) | |
806 | return r; | |
807 | ||
808 | r = unit_require_mounts_for(u, "/var/tmp"); | |
809 | if (r < 0) | |
810 | return r; | |
811 | } | |
812 | ||
ecc6e2b8 LP |
813 | if (c->std_output != EXEC_OUTPUT_KMSG && |
814 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 815 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
816 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
817 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 818 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 819 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 820 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 821 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 822 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 823 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 824 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
825 | return 0; |
826 | ||
827 | /* If syslog or kernel logging is requested, make sure our own | |
828 | * logging daemon is run first. */ | |
829 | ||
b46a529c LP |
830 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); |
831 | if (r < 0) | |
832 | return r; | |
23a177ef | 833 | |
87f0e418 LP |
834 | return 0; |
835 | } | |
836 | ||
87f0e418 LP |
837 | const char *unit_description(Unit *u) { |
838 | assert(u); | |
839 | ||
ac155bb8 MS |
840 | if (u->description) |
841 | return u->description; | |
87f0e418 | 842 | |
ac155bb8 | 843 | return strna(u->id); |
87f0e418 LP |
844 | } |
845 | ||
846 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 847 | char *t, **j; |
87f0e418 LP |
848 | UnitDependency d; |
849 | Iterator i; | |
47be870b | 850 | const char *prefix2; |
173e3821 LP |
851 | char |
852 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
853 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
854 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
855 | timestamp4[FORMAT_TIMESTAMP_MAX], |
856 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 857 | Unit *following; |
eeaedb7c LP |
858 | _cleanup_set_free_ Set *following_set = NULL; |
859 | int r; | |
87f0e418 LP |
860 | |
861 | assert(u); | |
ac155bb8 | 862 | assert(u->type >= 0); |
87f0e418 | 863 | |
4c940960 | 864 | prefix = strempty(prefix); |
63c372cb | 865 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
866 | |
867 | fprintf(f, | |
40d50879 | 868 | "%s-> Unit %s:\n" |
87f0e418 | 869 | "%s\tDescription: %s\n" |
9e2f7c11 | 870 | "%s\tInstance: %s\n" |
87f0e418 | 871 | "%s\tUnit Load State: %s\n" |
2fad8195 | 872 | "%s\tUnit Active State: %s\n" |
173e3821 | 873 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 874 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 875 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 876 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 877 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 878 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 879 | "%s\tTransient: %s\n" |
4ad49000 LP |
880 | "%s\tSlice: %s\n" |
881 | "%s\tCGroup: %s\n" | |
882 | "%s\tCGroup realized: %s\n" | |
6414b7c9 DS |
883 | "%s\tCGroup mask: 0x%x\n" |
884 | "%s\tCGroup members mask: 0x%x\n", | |
ac155bb8 | 885 | prefix, u->id, |
87f0e418 | 886 | prefix, unit_description(u), |
ac155bb8 MS |
887 | prefix, strna(u->instance), |
888 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 889 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
890 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
891 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
892 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
893 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 894 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 895 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 896 | prefix, yes_no(u->transient), |
4ad49000 LP |
897 | prefix, strna(unit_slice_name(u)), |
898 | prefix, strna(u->cgroup_path), | |
899 | prefix, yes_no(u->cgroup_realized), | |
bc432dc7 | 900 | prefix, u->cgroup_realized_mask, |
6414b7c9 | 901 | prefix, u->cgroup_members_mask); |
0301abf4 | 902 | |
ac155bb8 | 903 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
904 | fprintf(f, "%s\tName: %s\n", prefix, t); |
905 | ||
49dbfa7b LP |
906 | STRV_FOREACH(j, u->documentation) |
907 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
908 | ||
eeaedb7c LP |
909 | following = unit_following(u); |
910 | if (following) | |
ac155bb8 | 911 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 912 | |
eeaedb7c LP |
913 | r = unit_following_set(u, &following_set); |
914 | if (r >= 0) { | |
915 | Unit *other; | |
916 | ||
917 | SET_FOREACH(other, following_set, i) | |
918 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
919 | } | |
920 | ||
ac155bb8 MS |
921 | if (u->fragment_path) |
922 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 923 | |
1b64d026 LP |
924 | if (u->source_path) |
925 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
926 | ||
ae7a7182 | 927 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 928 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 929 | |
ac155bb8 | 930 | if (u->job_timeout > 0) |
2fa4092c | 931 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 932 | |
f189ab18 LP |
933 | if (u->job_timeout_action != FAILURE_ACTION_NONE) |
934 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, failure_action_to_string(u->job_timeout_action)); | |
935 | ||
936 | if (u->job_timeout_reboot_arg) | |
937 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
938 | ||
59fccdc5 LP |
939 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
940 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 941 | |
ac155bb8 | 942 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
943 | fprintf(f, |
944 | "%s\tCondition Timestamp: %s\n" | |
945 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
946 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
947 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 948 | |
59fccdc5 LP |
949 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
950 | fprintf(f, | |
951 | "%s\tAssert Timestamp: %s\n" | |
952 | "%s\tAssert Result: %s\n", | |
953 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
954 | prefix, yes_no(u->assert_result)); | |
955 | ||
87f0e418 LP |
956 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
957 | Unit *other; | |
958 | ||
ac155bb8 MS |
959 | SET_FOREACH(other, u->dependencies[d], i) |
960 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
961 | } |
962 | ||
7c8fa05c | 963 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
964 | fprintf(f, |
965 | "%s\tRequiresMountsFor:", prefix); | |
966 | ||
967 | STRV_FOREACH(j, u->requires_mounts_for) | |
968 | fprintf(f, " %s", *j); | |
969 | ||
970 | fputs("\n", f); | |
971 | } | |
972 | ||
ac155bb8 | 973 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 974 | |
b0650475 | 975 | fprintf(f, |
a40eb732 | 976 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
977 | "%s\tRefuseManualStart: %s\n" |
978 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 979 | "%s\tDefaultDependencies: %s\n" |
d420282b | 980 | "%s\tOnFailureJobMode: %s\n" |
7a6000a6 LP |
981 | "%s\tIgnoreOnIsolate: %s\n" |
982 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
983 | prefix, yes_no(u->stop_when_unneeded), |
984 | prefix, yes_no(u->refuse_manual_start), | |
985 | prefix, yes_no(u->refuse_manual_stop), | |
986 | prefix, yes_no(u->default_dependencies), | |
d420282b | 987 | prefix, job_mode_to_string(u->on_failure_job_mode), |
ac155bb8 MS |
988 | prefix, yes_no(u->ignore_on_isolate), |
989 | prefix, yes_no(u->ignore_on_snapshot)); | |
990 | ||
23a177ef LP |
991 | if (UNIT_VTABLE(u)->dump) |
992 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 993 | |
ac155bb8 | 994 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
995 | fprintf(f, |
996 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
997 | prefix, u->merged_into->id); |
998 | else if (u->load_state == UNIT_ERROR) | |
999 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 1000 | |
87f0e418 | 1001 | |
ac155bb8 MS |
1002 | if (u->job) |
1003 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1004 | |
e0209d83 MS |
1005 | if (u->nop_job) |
1006 | job_dump(u->nop_job, f, prefix2); | |
1007 | ||
87f0e418 LP |
1008 | } |
1009 | ||
1010 | /* Common implementation for multiple backends */ | |
e537352b | 1011 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1012 | int r; |
1013 | ||
1014 | assert(u); | |
23a177ef | 1015 | |
e48614c4 | 1016 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1017 | r = unit_load_fragment(u); |
1018 | if (r < 0) | |
23a177ef LP |
1019 | return r; |
1020 | ||
ac155bb8 | 1021 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1022 | return -ENOENT; |
1023 | ||
1024 | /* Load drop-in directory data */ | |
4ad49000 LP |
1025 | r = unit_load_dropin(unit_follow_merge(u)); |
1026 | if (r < 0) | |
23a177ef LP |
1027 | return r; |
1028 | ||
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | /* Common implementation for multiple backends */ | |
e537352b | 1033 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1034 | int r; |
87f0e418 LP |
1035 | |
1036 | assert(u); | |
1037 | ||
23a177ef LP |
1038 | /* Same as unit_load_fragment_and_dropin(), but whether |
1039 | * something can be loaded or not doesn't matter. */ | |
1040 | ||
1041 | /* Load a .service file */ | |
4ad49000 LP |
1042 | r = unit_load_fragment(u); |
1043 | if (r < 0) | |
87f0e418 LP |
1044 | return r; |
1045 | ||
ac155bb8 MS |
1046 | if (u->load_state == UNIT_STUB) |
1047 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1048 | |
87f0e418 | 1049 | /* Load drop-in directory data */ |
4ad49000 LP |
1050 | r = unit_load_dropin(unit_follow_merge(u)); |
1051 | if (r < 0) | |
87f0e418 LP |
1052 | return r; |
1053 | ||
23a177ef | 1054 | return 0; |
87f0e418 LP |
1055 | } |
1056 | ||
bba34eed | 1057 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1058 | assert(u); |
1059 | assert(target); | |
1060 | ||
ac155bb8 | 1061 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1062 | return 0; |
1063 | ||
35b8ca3a | 1064 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1065 | * that loop check below is reliable */ |
ac155bb8 MS |
1066 | if (u->load_state != UNIT_LOADED || |
1067 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1068 | return 0; |
1069 | ||
21256a2b LP |
1070 | /* If either side wants no automatic dependencies, then let's |
1071 | * skip this */ | |
ac155bb8 MS |
1072 | if (!u->default_dependencies || |
1073 | !target->default_dependencies) | |
21256a2b LP |
1074 | return 0; |
1075 | ||
98bc2000 | 1076 | /* Don't create loops */ |
ac155bb8 | 1077 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1078 | return 0; |
1079 | ||
1080 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
1081 | } | |
1082 | ||
e954c9cf | 1083 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 1084 | |
21256a2b LP |
1085 | static const UnitDependency deps[] = { |
1086 | UNIT_REQUIRED_BY, | |
1087 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
1088 | UNIT_WANTED_BY, | |
1089 | UNIT_BOUND_BY | |
1090 | }; | |
1091 | ||
bba34eed | 1092 | Unit *target; |
98bc2000 | 1093 | Iterator i; |
21256a2b | 1094 | unsigned k; |
db57f3c6 | 1095 | int r = 0; |
98bc2000 LP |
1096 | |
1097 | assert(u); | |
1098 | ||
21256a2b | 1099 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
1100 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
1101 | r = unit_add_default_target_dependency(u, target); | |
1102 | if (r < 0) | |
21256a2b | 1103 | return r; |
a016b922 LP |
1104 | } |
1105 | ||
e954c9cf LP |
1106 | return r; |
1107 | } | |
4ad49000 | 1108 | |
e954c9cf LP |
1109 | static int unit_add_slice_dependencies(Unit *u) { |
1110 | assert(u); | |
b81884e7 | 1111 | |
e954c9cf LP |
1112 | if (!unit_get_cgroup_context(u)) |
1113 | return 0; | |
1114 | ||
1115 | if (UNIT_ISSET(u->slice)) | |
1116 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true); | |
1117 | ||
d1fab3fe ZJS |
1118 | if (streq(u->id, SPECIAL_ROOT_SLICE)) |
1119 | return 0; | |
1120 | ||
e954c9cf | 1121 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true); |
98bc2000 LP |
1122 | } |
1123 | ||
e954c9cf | 1124 | static int unit_add_mount_dependencies(Unit *u) { |
9588bc32 LP |
1125 | char **i; |
1126 | int r; | |
1127 | ||
1128 | assert(u); | |
1129 | ||
1130 | STRV_FOREACH(i, u->requires_mounts_for) { | |
1131 | char prefix[strlen(*i) + 1]; | |
1132 | ||
1133 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
1134 | Unit *m; | |
1135 | ||
1136 | r = manager_get_unit_by_path(u->manager, prefix, ".mount", &m); | |
1137 | if (r < 0) | |
1138 | return r; | |
1139 | if (r == 0) | |
1140 | continue; | |
1141 | if (m == u) | |
1142 | continue; | |
1143 | ||
1144 | if (m->load_state != UNIT_LOADED) | |
1145 | continue; | |
1146 | ||
1147 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1148 | if (r < 0) | |
1149 | return r; | |
1150 | ||
1151 | if (m->fragment_path) { | |
1152 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1153 | if (r < 0) | |
1154 | return r; | |
1155 | } | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | return 0; | |
1160 | } | |
1161 | ||
95ae05c0 WC |
1162 | static int unit_add_startup_units(Unit *u) { |
1163 | CGroupContext *c; | |
1164 | int r = 0; | |
1165 | ||
1166 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1167 | if (!c) |
1168 | return 0; | |
1169 | ||
1170 | if (c->startup_cpu_shares == (unsigned long) -1 && | |
1171 | c->startup_blockio_weight == (unsigned long) -1) | |
1172 | return 0; | |
1173 | ||
1174 | r = set_put(u->manager->startup_units, u); | |
1175 | if (r == -EEXIST) | |
1176 | return 0; | |
1177 | ||
95ae05c0 WC |
1178 | return r; |
1179 | } | |
1180 | ||
87f0e418 LP |
1181 | int unit_load(Unit *u) { |
1182 | int r; | |
1183 | ||
1184 | assert(u); | |
1185 | ||
ac155bb8 | 1186 | if (u->in_load_queue) { |
71fda00f | 1187 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1188 | u->in_load_queue = false; |
87f0e418 LP |
1189 | } |
1190 | ||
ac155bb8 | 1191 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1192 | return -EINVAL; |
1193 | ||
ac155bb8 | 1194 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1195 | return 0; |
1196 | ||
c2756a68 LP |
1197 | if (UNIT_VTABLE(u)->load) { |
1198 | r = UNIT_VTABLE(u)->load(u); | |
1199 | if (r < 0) | |
87f0e418 | 1200 | goto fail; |
c2756a68 | 1201 | } |
23a177ef | 1202 | |
ac155bb8 | 1203 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1204 | r = -ENOENT; |
1205 | goto fail; | |
1206 | } | |
1207 | ||
7c8fa05c | 1208 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1209 | |
e954c9cf LP |
1210 | r = unit_add_target_dependencies(u); |
1211 | if (r < 0) | |
1212 | goto fail; | |
1213 | ||
1214 | r = unit_add_slice_dependencies(u); | |
1215 | if (r < 0) | |
1216 | goto fail; | |
c2756a68 | 1217 | |
e954c9cf | 1218 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1219 | if (r < 0) |
c2756a68 | 1220 | goto fail; |
7c8fa05c | 1221 | |
95ae05c0 WC |
1222 | r = unit_add_startup_units(u); |
1223 | if (r < 0) | |
1224 | goto fail; | |
1225 | ||
bc432dc7 | 1226 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
79008bdd | 1227 | log_unit_error(u->id, "More than one OnFailure= dependencies specified for %s but OnFailureJobMode=isolate set. Refusing.", u->id); |
c2756a68 LP |
1228 | r = -EINVAL; |
1229 | goto fail; | |
1230 | } | |
bc432dc7 LP |
1231 | |
1232 | unit_update_cgroup_members_masks(u); | |
f68319bb LP |
1233 | } |
1234 | ||
ac155bb8 | 1235 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1236 | |
1237 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1238 | unit_add_to_gc_queue(u); |
87f0e418 | 1239 | |
87f0e418 LP |
1240 | return 0; |
1241 | ||
1242 | fail: | |
c2756a68 | 1243 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1244 | u->load_error = r; |
c1e1601e | 1245 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1246 | unit_add_to_gc_queue(u); |
23a177ef | 1247 | |
79008bdd | 1248 | log_unit_debug(u->id, "Failed to load configuration for %s: %s", |
c1b6628d | 1249 | u->id, strerror(-r)); |
23a177ef | 1250 | |
87f0e418 LP |
1251 | return r; |
1252 | } | |
1253 | ||
49365733 LP |
1254 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1255 | Condition *c; | |
1256 | int triggered = -1; | |
1257 | ||
1258 | assert(u); | |
1259 | assert(to_string); | |
1260 | ||
1261 | /* If the condition list is empty, then it is true */ | |
1262 | if (!first) | |
1263 | return true; | |
1264 | ||
1265 | /* Otherwise, if all of the non-trigger conditions apply and | |
1266 | * if any of the trigger conditions apply (unless there are | |
1267 | * none) we return true */ | |
1268 | LIST_FOREACH(conditions, c, first) { | |
1269 | int r; | |
1270 | ||
1271 | r = condition_test(c); | |
1272 | if (r < 0) | |
79008bdd | 1273 | log_unit_warning(u->id, |
49365733 LP |
1274 | "Couldn't determine result for %s=%s%s%s for %s, assuming failed: %s", |
1275 | to_string(c->type), | |
1276 | c->trigger ? "|" : "", | |
1277 | c->negate ? "!" : "", | |
1278 | c->parameter, | |
1279 | u->id, | |
1280 | strerror(-r)); | |
1281 | else | |
79008bdd | 1282 | log_unit_debug(u->id, |
49365733 LP |
1283 | "%s=%s%s%s %s for %s.", |
1284 | to_string(c->type), | |
1285 | c->trigger ? "|" : "", | |
1286 | c->negate ? "!" : "", | |
1287 | c->parameter, | |
1288 | condition_result_to_string(c->result), | |
1289 | u->id); | |
1290 | ||
1291 | if (!c->trigger && r <= 0) | |
1292 | return false; | |
1293 | ||
1294 | if (c->trigger && triggered <= 0) | |
1295 | triggered = r > 0; | |
1296 | } | |
1297 | ||
1298 | return triggered != 0; | |
1299 | } | |
1300 | ||
9588bc32 | 1301 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1302 | assert(u); |
1303 | ||
ac155bb8 | 1304 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1305 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1306 | |
ac155bb8 | 1307 | return u->condition_result; |
90bbc946 LP |
1308 | } |
1309 | ||
59fccdc5 LP |
1310 | static bool unit_assert_test(Unit *u) { |
1311 | assert(u); | |
1312 | ||
1313 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1314 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1315 | |
1316 | return u->assert_result; | |
1317 | } | |
1318 | ||
44a6b1b6 | 1319 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
c6918296 | 1320 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1321 | |
1322 | assert(u); | |
1323 | assert(t >= 0); | |
1324 | assert(t < _JOB_TYPE_MAX); | |
1325 | ||
1326 | if (t != JOB_START && t != JOB_STOP) | |
1327 | return NULL; | |
c6918296 MS |
1328 | |
1329 | format_table = &UNIT_VTABLE(u)->status_message_formats; | |
1330 | if (!format_table) | |
877d54e9 LP |
1331 | return NULL; |
1332 | ||
1333 | return format_table->starting_stopping[t == JOB_STOP]; | |
1334 | } | |
1335 | ||
44a6b1b6 | 1336 | _pure_ static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) { |
877d54e9 LP |
1337 | const char *format; |
1338 | ||
1339 | assert(u); | |
1340 | assert(t >= 0); | |
1341 | assert(t < _JOB_TYPE_MAX); | |
1342 | ||
1343 | format = unit_get_status_message_format(u, t); | |
1344 | if (format) | |
1345 | return format; | |
1346 | ||
1347 | /* Return generic strings */ | |
1348 | if (t == JOB_START) | |
1349 | return "Starting %s."; | |
1350 | else if (t == JOB_STOP) | |
1351 | return "Stopping %s."; | |
1352 | else if (t == JOB_RELOAD) | |
1353 | return "Reloading %s."; | |
1354 | ||
1355 | return NULL; | |
1356 | } | |
1357 | ||
1358 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1359 | const char *format; | |
1360 | ||
1361 | assert(u); | |
1362 | ||
1363 | /* We only print status messages for selected units on | |
1364 | * selected operations. */ | |
c6918296 | 1365 | |
877d54e9 | 1366 | format = unit_get_status_message_format(u, t); |
c6918296 MS |
1367 | if (!format) |
1368 | return; | |
1369 | ||
bcfce235 | 1370 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1371 | unit_status_printf(u, "", format); |
bcfce235 | 1372 | REENABLE_WARNING; |
c6918296 MS |
1373 | } |
1374 | ||
877d54e9 LP |
1375 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
1376 | const char *format; | |
1377 | char buf[LINE_MAX]; | |
1378 | sd_id128_t mid; | |
1379 | ||
1380 | assert(u); | |
1381 | ||
1382 | if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD) | |
1383 | return; | |
1384 | ||
81270860 LP |
1385 | if (log_on_console()) |
1386 | return; | |
1387 | ||
877d54e9 LP |
1388 | /* We log status messages for all units and all operations. */ |
1389 | ||
1390 | format = unit_get_status_message_format_try_harder(u, t); | |
1391 | if (!format) | |
1392 | return; | |
1393 | ||
bcfce235 | 1394 | DISABLE_WARNING_FORMAT_NONLITERAL; |
877d54e9 | 1395 | snprintf(buf, sizeof(buf), format, unit_description(u)); |
bcfce235 | 1396 | REENABLE_WARNING; |
877d54e9 LP |
1397 | |
1398 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1399 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1400 | SD_MESSAGE_UNIT_RELOADING; | |
1401 | ||
e2cc6eca LP |
1402 | log_unit_struct(u->id, |
1403 | LOG_INFO, | |
1404 | LOG_MESSAGE_ID(mid), | |
1405 | LOG_MESSAGE("%s", buf), | |
c1b6628d | 1406 | NULL); |
877d54e9 | 1407 | } |
877d54e9 | 1408 | |
87f0e418 | 1409 | /* Errors: |
d5159713 LP |
1410 | * -EBADR: This unit type does not support starting. |
1411 | * -EALREADY: Unit is already started. | |
1412 | * -EAGAIN: An operation is already in progress. Retry later. | |
1413 | * -ECANCELED: Too many requests for now. | |
59fccdc5 | 1414 | * -EPROTO: Assert failed |
87f0e418 LP |
1415 | */ |
1416 | int unit_start(Unit *u) { | |
1417 | UnitActiveState state; | |
92ab323c | 1418 | Unit *following; |
82a2b6bb | 1419 | int r; |
87f0e418 LP |
1420 | |
1421 | assert(u); | |
1422 | ||
ac155bb8 | 1423 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1424 | return -EINVAL; |
1425 | ||
a82e5507 LP |
1426 | /* If this is already started, then this will succeed. Note |
1427 | * that this will even succeed if this unit is not startable | |
1428 | * by the user. This is relied on to detect when we need to | |
1429 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1430 | state = unit_active_state(u); |
1431 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1432 | return -EALREADY; | |
1433 | ||
a82e5507 LP |
1434 | /* If the conditions failed, don't do anything at all. If we |
1435 | * already are activating this call might still be useful to | |
1436 | * speed up activation in case there is some hold-off time, | |
1437 | * but we don't want to recheck the condition in that case. */ | |
1438 | if (state != UNIT_ACTIVATING && | |
1439 | !unit_condition_test(u)) { | |
79008bdd | 1440 | log_unit_debug(u->id, "Starting of %s requested but condition failed. Not starting unit.", u->id); |
52661efd LP |
1441 | return -EALREADY; |
1442 | } | |
1443 | ||
59fccdc5 LP |
1444 | /* If the asserts failed, fail the entire job */ |
1445 | if (state != UNIT_ACTIVATING && | |
1446 | !unit_assert_test(u)) { | |
79008bdd | 1447 | log_unit_debug(u->id, "Starting of %s requested but asserts failed.", u->id); |
59fccdc5 LP |
1448 | return -EPROTO; |
1449 | } | |
1450 | ||
92ab323c | 1451 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1452 | following = unit_following(u); |
1453 | if (following) { | |
79008bdd | 1454 | log_unit_debug(u->id, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1455 | return unit_start(following); |
1456 | } | |
1457 | ||
0faacd47 LP |
1458 | if (UNIT_VTABLE(u)->supported && !UNIT_VTABLE(u)->supported(u->manager)) |
1459 | return -ENOTSUP; | |
1460 | ||
92ab323c LP |
1461 | /* If it is stopped, but we cannot start it, then fail */ |
1462 | if (!UNIT_VTABLE(u)->start) | |
1463 | return -EBADR; | |
1464 | ||
87f0e418 LP |
1465 | /* We don't suppress calls to ->start() here when we are |
1466 | * already starting, to allow this request to be used as a | |
1467 | * "hurry up" call, for example when the unit is in some "auto | |
1468 | * restart" state where it waits for a holdoff timer to elapse | |
1469 | * before it will start again. */ | |
1470 | ||
c1e1601e | 1471 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1472 | |
82a2b6bb LP |
1473 | r = UNIT_VTABLE(u)->start(u); |
1474 | if (r <= 0) | |
1475 | return r; | |
1476 | ||
1477 | /* Log if the start function actually did something */ | |
1478 | unit_status_log_starting_stopping_reloading(u, JOB_START); | |
1479 | unit_status_print_starting_stopping(u, JOB_START); | |
1480 | return r; | |
87f0e418 LP |
1481 | } |
1482 | ||
1483 | bool unit_can_start(Unit *u) { | |
1484 | assert(u); | |
1485 | ||
1486 | return !!UNIT_VTABLE(u)->start; | |
1487 | } | |
1488 | ||
2528a7a6 LP |
1489 | bool unit_can_isolate(Unit *u) { |
1490 | assert(u); | |
1491 | ||
1492 | return unit_can_start(u) && | |
ac155bb8 | 1493 | u->allow_isolate; |
2528a7a6 LP |
1494 | } |
1495 | ||
87f0e418 LP |
1496 | /* Errors: |
1497 | * -EBADR: This unit type does not support stopping. | |
1498 | * -EALREADY: Unit is already stopped. | |
1499 | * -EAGAIN: An operation is already in progress. Retry later. | |
1500 | */ | |
1501 | int unit_stop(Unit *u) { | |
1502 | UnitActiveState state; | |
92ab323c | 1503 | Unit *following; |
82a2b6bb | 1504 | int r; |
87f0e418 LP |
1505 | |
1506 | assert(u); | |
1507 | ||
87f0e418 | 1508 | state = unit_active_state(u); |
fdf20a31 | 1509 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1510 | return -EALREADY; |
1511 | ||
0faacd47 LP |
1512 | following = unit_following(u); |
1513 | if (following) { | |
1514 | log_unit_debug(u->id, "Redirecting stop request from %s to %s.", u->id, following->id); | |
92ab323c LP |
1515 | return unit_stop(following); |
1516 | } | |
1517 | ||
7898b0cf LP |
1518 | if (!UNIT_VTABLE(u)->stop) |
1519 | return -EBADR; | |
1520 | ||
c1e1601e | 1521 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1522 | |
82a2b6bb LP |
1523 | r = UNIT_VTABLE(u)->stop(u); |
1524 | if (r <= 0) | |
1525 | return r; | |
1526 | ||
1527 | unit_status_log_starting_stopping_reloading(u, JOB_STOP); | |
1528 | unit_status_print_starting_stopping(u, JOB_STOP); | |
1529 | return r; | |
87f0e418 LP |
1530 | } |
1531 | ||
1532 | /* Errors: | |
1533 | * -EBADR: This unit type does not support reloading. | |
1534 | * -ENOEXEC: Unit is not started. | |
1535 | * -EAGAIN: An operation is already in progress. Retry later. | |
1536 | */ | |
1537 | int unit_reload(Unit *u) { | |
1538 | UnitActiveState state; | |
92ab323c | 1539 | Unit *following; |
82a2b6bb | 1540 | int r; |
87f0e418 LP |
1541 | |
1542 | assert(u); | |
1543 | ||
ac155bb8 | 1544 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1545 | return -EINVAL; |
1546 | ||
87f0e418 LP |
1547 | if (!unit_can_reload(u)) |
1548 | return -EBADR; | |
1549 | ||
1550 | state = unit_active_state(u); | |
e364ad06 | 1551 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1552 | return -EALREADY; |
1553 | ||
6a371e23 | 1554 | if (state != UNIT_ACTIVE) { |
0faacd47 | 1555 | log_unit_warning(u->id, "Unit %s cannot be reloaded because it is inactive.", u->id); |
87f0e418 | 1556 | return -ENOEXEC; |
6a371e23 | 1557 | } |
87f0e418 | 1558 | |
e48614c4 ZJS |
1559 | following = unit_following(u); |
1560 | if (following) { | |
0faacd47 | 1561 | log_unit_debug(u->id, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1562 | return unit_reload(following); |
1563 | } | |
1564 | ||
c1e1601e | 1565 | unit_add_to_dbus_queue(u); |
82a2b6bb LP |
1566 | |
1567 | r = UNIT_VTABLE(u)->reload(u); | |
1568 | if (r <= 0) | |
1569 | return r; | |
1570 | ||
1571 | unit_status_log_starting_stopping_reloading(u, JOB_RELOAD); | |
1572 | return r; | |
87f0e418 LP |
1573 | } |
1574 | ||
1575 | bool unit_can_reload(Unit *u) { | |
1576 | assert(u); | |
1577 | ||
1578 | if (!UNIT_VTABLE(u)->reload) | |
1579 | return false; | |
1580 | ||
1581 | if (!UNIT_VTABLE(u)->can_reload) | |
1582 | return true; | |
1583 | ||
1584 | return UNIT_VTABLE(u)->can_reload(u); | |
1585 | } | |
1586 | ||
b4a16b7b | 1587 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
1588 | Iterator i; |
1589 | Unit *other; | |
1590 | ||
1591 | assert(u); | |
1592 | ||
1593 | /* If this service shall be shut down when unneeded then do | |
1594 | * so. */ | |
1595 | ||
ac155bb8 | 1596 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1597 | return; |
1598 | ||
1599 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1600 | return; | |
1601 | ||
ac155bb8 | 1602 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i) |
31afa0a4 | 1603 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1604 | return; |
1605 | ||
ac155bb8 | 1606 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
31afa0a4 | 1607 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1608 | return; |
1609 | ||
ac155bb8 | 1610 | SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i) |
31afa0a4 | 1611 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1612 | return; |
1613 | ||
ac155bb8 | 1614 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
31afa0a4 | 1615 | if (unit_active_or_pending(other)) |
b81884e7 LP |
1616 | return; |
1617 | ||
79008bdd | 1618 | log_unit_info(u->id, "Unit %s is not needed anymore. Stopping.", u->id); |
f3bff0eb LP |
1619 | |
1620 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
ac155bb8 | 1621 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1622 | } |
1623 | ||
ff502445 LP |
1624 | static void unit_check_binds_to(Unit *u) { |
1625 | bool stop = false; | |
1626 | Unit *other; | |
1627 | Iterator i; | |
1628 | ||
1629 | assert(u); | |
1630 | ||
1631 | if (u->job) | |
1632 | return; | |
1633 | ||
1634 | if (unit_active_state(u) != UNIT_ACTIVE) | |
1635 | return; | |
1636 | ||
1637 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) { | |
1638 | if (other->job) | |
1639 | continue; | |
1640 | ||
1641 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1642 | continue; | |
1643 | ||
1644 | stop = true; | |
1645 | } | |
1646 | ||
1647 | if (!stop) | |
1648 | return; | |
1649 | ||
418761f5 | 1650 | log_unit_info(u->id, "Unit %s is bound to inactive unit. Stopping, too.", u->id); |
ff502445 LP |
1651 | |
1652 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
1653 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); | |
1654 | } | |
1655 | ||
87f0e418 LP |
1656 | static void retroactively_start_dependencies(Unit *u) { |
1657 | Iterator i; | |
1658 | Unit *other; | |
1659 | ||
1660 | assert(u); | |
1661 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1662 | ||
ac155bb8 MS |
1663 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1664 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1665 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1666 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1667 | |
7f2cddae | 1668 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1669 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1670 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1671 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1672 | |
ac155bb8 MS |
1673 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
1674 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1675 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1676 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1677 | |
ac155bb8 MS |
1678 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1679 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1680 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1681 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1682 | |
ac155bb8 | 1683 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1684 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1685 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1686 | |
ac155bb8 | 1687 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1688 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1689 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1690 | } |
1691 | ||
1692 | static void retroactively_stop_dependencies(Unit *u) { | |
1693 | Iterator i; | |
1694 | Unit *other; | |
1695 | ||
1696 | assert(u); | |
1697 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1698 | ||
b81884e7 | 1699 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1700 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1701 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1702 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1703 | } |
1704 | ||
1705 | static void check_unneeded_dependencies(Unit *u) { | |
1706 | Iterator i; | |
1707 | Unit *other; | |
1708 | ||
1709 | assert(u); | |
1710 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1711 | |
1712 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1713 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1714 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1715 | unit_check_unneeded(other); |
ac155bb8 | 1716 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1717 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1718 | unit_check_unneeded(other); |
ac155bb8 | 1719 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1720 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1721 | unit_check_unneeded(other); |
ac155bb8 | 1722 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1723 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1724 | unit_check_unneeded(other); |
ac155bb8 | 1725 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1726 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1727 | unit_check_unneeded(other); |
7f2cddae | 1728 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1729 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1730 | unit_check_unneeded(other); | |
87f0e418 LP |
1731 | } |
1732 | ||
3ecaa09b | 1733 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1734 | Unit *other; |
1735 | Iterator i; | |
1736 | ||
1737 | assert(u); | |
1738 | ||
ac155bb8 | 1739 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1740 | return; |
1741 | ||
79008bdd | 1742 | log_unit_info(u->id, "Triggering OnFailure= dependencies of %s.", u->id); |
222ae6a8 | 1743 | |
ac155bb8 | 1744 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1745 | int r; |
1746 | ||
d420282b | 1747 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, true, NULL, NULL); |
c1b6628d | 1748 | if (r < 0) |
31938a85 | 1749 | log_unit_error_errno(u->id, r, "Failed to enqueue OnFailure= job: %m"); |
222ae6a8 | 1750 | } |
c0daa706 LP |
1751 | } |
1752 | ||
3ecaa09b LP |
1753 | void unit_trigger_notify(Unit *u) { |
1754 | Unit *other; | |
1755 | Iterator i; | |
1756 | ||
1757 | assert(u); | |
1758 | ||
1759 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1760 | if (UNIT_VTABLE(other)->trigger_notify) | |
1761 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1762 | } | |
1763 | ||
e2f3b44c | 1764 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 1765 | Manager *m; |
7e6e7b06 | 1766 | bool unexpected; |
a096ed36 | 1767 | |
87f0e418 LP |
1768 | assert(u); |
1769 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1770 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1771 | |
8e471ccd LP |
1772 | /* Note that this is called for all low-level state changes, |
1773 | * even if they might map to the same high-level | |
865cc19a | 1774 | * UnitActiveState! That means that ns == os is an expected |
c5315881 | 1775 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1776 | * this function will be called too! */ |
87f0e418 | 1777 | |
546ac4f0 MS |
1778 | m = u->manager; |
1779 | ||
f755e3b7 | 1780 | /* Update timestamps for state changes */ |
546ac4f0 | 1781 | if (m->n_reloading <= 0) { |
bdbf9951 | 1782 | dual_timestamp ts; |
173e3821 | 1783 | |
bdbf9951 | 1784 | dual_timestamp_get(&ts); |
173e3821 | 1785 | |
bdbf9951 | 1786 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1787 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1788 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1789 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1790 | |
1791 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1792 | u->active_enter_timestamp = ts; |
bdbf9951 | 1793 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1794 | u->active_exit_timestamp = ts; |
bdbf9951 | 1795 | } |
87f0e418 | 1796 | |
865cc19a | 1797 | /* Keep track of failed units */ |
3f3cc397 | 1798 | if (ns == UNIT_FAILED) |
f755e3b7 | 1799 | set_put(u->manager->failed_units, u); |
3f3cc397 | 1800 | else |
f755e3b7 LP |
1801 | set_remove(u->manager->failed_units, u); |
1802 | ||
1803 | /* Make sure the cgroup is always removed when we become inactive */ | |
fdf20a31 | 1804 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
b1491eba | 1805 | unit_destroy_cgroup_if_empty(u); |
fb385181 | 1806 | |
9cd86184 | 1807 | /* Note that this doesn't apply to RemainAfterExit services exiting |
6f285378 | 1808 | * successfully, since there's no change of state in that case. Which is |
9cd86184 | 1809 | * why it is handled in service_set_state() */ |
7ed9f6cd | 1810 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
1811 | ExecContext *ec; |
1812 | ||
1813 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 1814 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 ZJS |
1815 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
1816 | m->n_on_console --; | |
1817 | ||
1818 | if (m->n_on_console == 0) | |
1819 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 1820 | m->no_console_output = false; |
31a7eb86 ZJS |
1821 | } else |
1822 | m->n_on_console ++; | |
7ed9f6cd MS |
1823 | } |
1824 | } | |
1825 | ||
ac155bb8 | 1826 | if (u->job) { |
7e6e7b06 | 1827 | unexpected = false; |
87f0e418 | 1828 | |
ac155bb8 | 1829 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1830 | |
1831 | /* So we reached a different state for this | |
1832 | * job. Let's see if we can run it now if it | |
1833 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1834 | job_add_to_run_queue(u->job); |
87f0e418 | 1835 | |
b410e6b9 | 1836 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1837 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1838 | * hence needs to invalidate jobs. */ |
87f0e418 | 1839 | |
ac155bb8 | 1840 | switch (u->job->type) { |
87f0e418 | 1841 | |
b410e6b9 LP |
1842 | case JOB_START: |
1843 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1844 | |
b410e6b9 | 1845 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1846 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1847 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1848 | unexpected = true; |
41b02ec7 | 1849 | |
fdf20a31 | 1850 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1851 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1852 | } |
87f0e418 | 1853 | |
b410e6b9 | 1854 | break; |
87f0e418 | 1855 | |
b410e6b9 LP |
1856 | case JOB_RELOAD: |
1857 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1858 | |
ac155bb8 | 1859 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1860 | if (ns == UNIT_ACTIVE) |
5273510e | 1861 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1862 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1863 | unexpected = true; |
41b02ec7 | 1864 | |
fdf20a31 | 1865 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1866 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1867 | } |
b410e6b9 | 1868 | } |
87f0e418 | 1869 | |
b410e6b9 | 1870 | break; |
87f0e418 | 1871 | |
b410e6b9 LP |
1872 | case JOB_STOP: |
1873 | case JOB_RESTART: | |
1874 | case JOB_TRY_RESTART: | |
87f0e418 | 1875 | |
fdf20a31 | 1876 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1877 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1878 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1879 | unexpected = true; |
5273510e | 1880 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1881 | } |
87f0e418 | 1882 | |
b410e6b9 | 1883 | break; |
87f0e418 | 1884 | |
b410e6b9 LP |
1885 | default: |
1886 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1887 | } |
87f0e418 | 1888 | |
7e6e7b06 LP |
1889 | } else |
1890 | unexpected = true; | |
1891 | ||
546ac4f0 | 1892 | if (m->n_reloading <= 0) { |
f3bff0eb | 1893 | |
bdbf9951 LP |
1894 | /* If this state change happened without being |
1895 | * requested by a job, then let's retroactively start | |
1896 | * or stop dependencies. We skip that step when | |
1897 | * deserializing, since we don't want to create any | |
1898 | * additional jobs just because something is already | |
1899 | * activated. */ | |
1900 | ||
1901 | if (unexpected) { | |
1902 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1903 | retroactively_start_dependencies(u); | |
1904 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1905 | retroactively_stop_dependencies(u); | |
1906 | } | |
5de9682c | 1907 | |
cd0504d0 | 1908 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 1909 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
1910 | check_unneeded_dependencies(u); |
1911 | ||
bdbf9951 | 1912 | if (ns != os && ns == UNIT_FAILED) { |
79008bdd | 1913 | log_unit_notice(u->id, "Unit %s entered failed state.", u->id); |
3ecaa09b | 1914 | unit_start_on_failure(u); |
cd6d0a45 | 1915 | } |
3b2775c5 | 1916 | } |
e537352b | 1917 | |
3b2775c5 LP |
1918 | /* Some names are special */ |
1919 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1920 | ||
1921 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
865cc19a | 1922 | /* The bus might have just become available, |
3b2775c5 LP |
1923 | * hence try to connect to it, if we aren't |
1924 | * yet connected. */ | |
546ac4f0 | 1925 | bus_init(m, true); |
3b2775c5 | 1926 | |
ac155bb8 | 1927 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1928 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
546ac4f0 | 1929 | m->n_reloading <= 0) { |
3b2775c5 | 1930 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 1931 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 1932 | u->in_audit = true; |
3b2775c5 | 1933 | } |
e983b760 | 1934 | |
3b2775c5 | 1935 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 1936 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 1937 | |
3b2775c5 | 1938 | } else { |
bdbf9951 | 1939 | |
3b2775c5 LP |
1940 | /* We don't care about D-Bus here, since we'll get an |
1941 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1942 | |
ac155bb8 | 1943 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1944 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1945 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
546ac4f0 | 1946 | m->n_reloading <= 0) { |
4927fcae | 1947 | |
3b2775c5 LP |
1948 | /* Hmm, if there was no start record written |
1949 | * write it now, so that we always have a nice | |
1950 | * pair */ | |
ac155bb8 | 1951 | if (!u->in_audit) { |
546ac4f0 | 1952 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 1953 | |
3b2775c5 | 1954 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 1955 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1956 | } else |
1957 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 1958 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1959 | |
ac155bb8 | 1960 | u->in_audit = false; |
cd6d0a45 | 1961 | } |
f278026d LP |
1962 | } |
1963 | ||
546ac4f0 | 1964 | manager_recheck_journal(m); |
3ecaa09b | 1965 | unit_trigger_notify(u); |
3b2775c5 | 1966 | |
ff502445 LP |
1967 | if (u->manager->n_reloading <= 0) { |
1968 | /* Maybe we finished startup and are now ready for | |
1969 | * being stopped because unneeded? */ | |
bf6dcfa6 | 1970 | unit_check_unneeded(u); |
c1e1601e | 1971 | |
ff502445 LP |
1972 | /* Maybe we finished startup, but something we needed |
1973 | * has vanished? Let's die then. (This happens when | |
1974 | * something BindsTo= to a Type=oneshot unit, as these | |
1975 | * units go directly from starting to inactive, | |
1976 | * without ever entering started.) */ | |
1977 | unit_check_binds_to(u); | |
1978 | } | |
1979 | ||
c1e1601e | 1980 | unit_add_to_dbus_queue(u); |
701cc384 | 1981 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1982 | } |
1983 | ||
87f0e418 | 1984 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
1985 | int q, r; |
1986 | ||
87f0e418 LP |
1987 | assert(u); |
1988 | assert(pid >= 1); | |
1989 | ||
5ba6985b LP |
1990 | /* Watch a specific PID. We only support one or two units |
1991 | * watching each PID for now, not more. */ | |
1992 | ||
d5099efc | 1993 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
1994 | if (r < 0) |
1995 | return r; | |
1996 | ||
d5099efc | 1997 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL); |
a911bb9a LP |
1998 | if (r < 0) |
1999 | return r; | |
2000 | ||
5ba6985b LP |
2001 | r = hashmap_put(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
2002 | if (r == -EEXIST) { | |
d5099efc | 2003 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL); |
5ba6985b LP |
2004 | if (r < 0) |
2005 | return r; | |
05e343b7 | 2006 | |
5ba6985b LP |
2007 | r = hashmap_put(u->manager->watch_pids2, LONG_TO_PTR(pid), u); |
2008 | } | |
a911bb9a | 2009 | |
5ba6985b | 2010 | q = set_put(u->pids, LONG_TO_PTR(pid)); |
a911bb9a LP |
2011 | if (q < 0) |
2012 | return q; | |
2013 | ||
2014 | return r; | |
87f0e418 LP |
2015 | } |
2016 | ||
2017 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
2018 | assert(u); | |
2019 | assert(pid >= 1); | |
2020 | ||
5ba6985b LP |
2021 | hashmap_remove_value(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
2022 | hashmap_remove_value(u->manager->watch_pids2, LONG_TO_PTR(pid), u); | |
a911bb9a LP |
2023 | set_remove(u->pids, LONG_TO_PTR(pid)); |
2024 | } | |
2025 | ||
bd44e61b LP |
2026 | void unit_unwatch_all_pids(Unit *u) { |
2027 | assert(u); | |
2028 | ||
2029 | while (!set_isempty(u->pids)) | |
2030 | unit_unwatch_pid(u, PTR_TO_LONG(set_first(u->pids))); | |
2031 | ||
2032 | set_free(u->pids); | |
2033 | u->pids = NULL; | |
2034 | } | |
2035 | ||
2036 | static int unit_watch_pids_in_path(Unit *u, const char *path) { | |
a911bb9a LP |
2037 | _cleanup_closedir_ DIR *d = NULL; |
2038 | _cleanup_fclose_ FILE *f = NULL; | |
2039 | int ret = 0, r; | |
2040 | ||
2041 | assert(u); | |
2042 | assert(path); | |
2043 | ||
2044 | /* Adds all PIDs from a specific cgroup path to the set of PIDs we watch. */ | |
2045 | ||
2046 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f); | |
2047 | if (r >= 0) { | |
2048 | pid_t pid; | |
2049 | ||
2050 | while ((r = cg_read_pid(f, &pid)) > 0) { | |
2051 | r = unit_watch_pid(u, pid); | |
2052 | if (r < 0 && ret >= 0) | |
2053 | ret = r; | |
2054 | } | |
2055 | if (r < 0 && ret >= 0) | |
2056 | ret = r; | |
2057 | ||
2058 | } else if (ret >= 0) | |
2059 | ret = r; | |
2060 | ||
2061 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d); | |
2062 | if (r >= 0) { | |
2063 | char *fn; | |
2064 | ||
2065 | while ((r = cg_read_subgroup(d, &fn)) > 0) { | |
2066 | _cleanup_free_ char *p = NULL; | |
2067 | ||
2068 | p = strjoin(path, "/", fn, NULL); | |
2069 | free(fn); | |
2070 | ||
2071 | if (!p) | |
2072 | return -ENOMEM; | |
2073 | ||
bd44e61b | 2074 | r = unit_watch_pids_in_path(u, p); |
a911bb9a LP |
2075 | if (r < 0 && ret >= 0) |
2076 | ret = r; | |
2077 | } | |
2078 | if (r < 0 && ret >= 0) | |
2079 | ret = r; | |
2080 | ||
2081 | } else if (ret >= 0) | |
2082 | ret = r; | |
2083 | ||
2084 | return ret; | |
2085 | } | |
2086 | ||
a911bb9a LP |
2087 | int unit_watch_all_pids(Unit *u) { |
2088 | assert(u); | |
2089 | ||
a911bb9a LP |
2090 | /* Adds all PIDs from our cgroup to the set of PIDs we watch */ |
2091 | ||
bd44e61b LP |
2092 | if (!u->cgroup_path) |
2093 | return -ENOENT; | |
a911bb9a | 2094 | |
bd44e61b | 2095 | return unit_watch_pids_in_path(u, u->cgroup_path); |
a911bb9a LP |
2096 | } |
2097 | ||
2098 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2099 | Iterator i; | |
2100 | void *e; | |
2101 | ||
2102 | assert(u); | |
2103 | ||
2104 | /* Cleans dead PIDs from our list */ | |
2105 | ||
2106 | SET_FOREACH(e, u->pids, i) { | |
2107 | pid_t pid = PTR_TO_LONG(e); | |
2108 | ||
2109 | if (pid == except1 || pid == except2) | |
2110 | continue; | |
2111 | ||
9f5650ae | 2112 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2113 | unit_unwatch_pid(u, pid); |
a911bb9a | 2114 | } |
87f0e418 LP |
2115 | } |
2116 | ||
87f0e418 LP |
2117 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2118 | assert(u); | |
2119 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2120 | ||
2121 | switch (j) { | |
2122 | ||
2123 | case JOB_VERIFY_ACTIVE: | |
2124 | case JOB_START: | |
57339f47 | 2125 | case JOB_STOP: |
e0209d83 | 2126 | case JOB_NOP: |
87f0e418 LP |
2127 | return true; |
2128 | ||
87f0e418 LP |
2129 | case JOB_RESTART: |
2130 | case JOB_TRY_RESTART: | |
2131 | return unit_can_start(u); | |
2132 | ||
2133 | case JOB_RELOAD: | |
2134 | return unit_can_reload(u); | |
2135 | ||
2136 | case JOB_RELOAD_OR_START: | |
2137 | return unit_can_reload(u) && unit_can_start(u); | |
2138 | ||
2139 | default: | |
2140 | assert_not_reached("Invalid job type"); | |
2141 | } | |
2142 | } | |
2143 | ||
d1fab3fe | 2144 | static int maybe_warn_about_dependency(const char *id, const char *other, UnitDependency dependency) { |
3f3cc397 LP |
2145 | assert(id); |
2146 | ||
d1fab3fe ZJS |
2147 | switch (dependency) { |
2148 | case UNIT_REQUIRES: | |
2149 | case UNIT_REQUIRES_OVERRIDABLE: | |
2150 | case UNIT_WANTS: | |
2151 | case UNIT_REQUISITE: | |
2152 | case UNIT_REQUISITE_OVERRIDABLE: | |
2153 | case UNIT_BINDS_TO: | |
2154 | case UNIT_PART_OF: | |
2155 | case UNIT_REQUIRED_BY: | |
2156 | case UNIT_REQUIRED_BY_OVERRIDABLE: | |
2157 | case UNIT_WANTED_BY: | |
2158 | case UNIT_BOUND_BY: | |
2159 | case UNIT_CONSISTS_OF: | |
2160 | case UNIT_REFERENCES: | |
2161 | case UNIT_REFERENCED_BY: | |
2162 | case UNIT_PROPAGATES_RELOAD_TO: | |
2163 | case UNIT_RELOAD_PROPAGATED_FROM: | |
2164 | case UNIT_JOINS_NAMESPACE_OF: | |
2165 | return 0; | |
2166 | ||
2167 | case UNIT_CONFLICTS: | |
2168 | case UNIT_CONFLICTED_BY: | |
2169 | case UNIT_BEFORE: | |
2170 | case UNIT_AFTER: | |
2171 | case UNIT_ON_FAILURE: | |
2172 | case UNIT_TRIGGERS: | |
2173 | case UNIT_TRIGGERED_BY: | |
2174 | if (streq_ptr(id, other)) | |
79008bdd | 2175 | log_unit_warning(id, "Dependency %s=%s dropped from unit %s", |
d1fab3fe ZJS |
2176 | unit_dependency_to_string(dependency), id, other); |
2177 | else | |
79008bdd | 2178 | log_unit_warning(id, "Dependency %s=%s dropped from unit %s merged into %s", |
d1fab3fe ZJS |
2179 | unit_dependency_to_string(dependency), id, |
2180 | strna(other), id); | |
2181 | return -EINVAL; | |
2182 | ||
2183 | case _UNIT_DEPENDENCY_MAX: | |
2184 | case _UNIT_DEPENDENCY_INVALID: | |
2185 | break; | |
2186 | } | |
3f3cc397 | 2187 | |
d1fab3fe ZJS |
2188 | assert_not_reached("Invalid dependency type"); |
2189 | } | |
2190 | ||
701cc384 | 2191 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
2192 | |
2193 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2194 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 2195 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
2196 | [UNIT_WANTS] = UNIT_WANTED_BY, |
2197 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 2198 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
7f2cddae | 2199 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2200 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
87f0e418 | 2201 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 2202 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 2203 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
7f2cddae | 2204 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2205 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2206 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2207 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2208 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2209 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2210 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2211 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2212 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2213 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2214 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2215 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2216 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2217 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2218 | }; |
701cc384 | 2219 | int r, q = 0, v = 0, w = 0; |
d1fab3fe | 2220 | Unit *orig_u = u, *orig_other = other; |
87f0e418 LP |
2221 | |
2222 | assert(u); | |
2223 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2224 | assert(other); |
2225 | ||
9f151f29 LP |
2226 | u = unit_follow_merge(u); |
2227 | other = unit_follow_merge(other); | |
2228 | ||
87f0e418 LP |
2229 | /* We won't allow dependencies on ourselves. We will not |
2230 | * consider them an error however. */ | |
d1fab3fe ZJS |
2231 | if (u == other) { |
2232 | maybe_warn_about_dependency(orig_u->id, orig_other->id, d); | |
87f0e418 | 2233 | return 0; |
d1fab3fe | 2234 | } |
87f0e418 | 2235 | |
d5099efc | 2236 | r = set_ensure_allocated(&u->dependencies[d], NULL); |
613b411c | 2237 | if (r < 0) |
87f0e418 LP |
2238 | return r; |
2239 | ||
613b411c | 2240 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
d5099efc | 2241 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], NULL); |
613b411c LP |
2242 | if (r < 0) |
2243 | return r; | |
2244 | } | |
2245 | ||
2246 | if (add_reference) { | |
d5099efc | 2247 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], NULL); |
613b411c | 2248 | if (r < 0) |
5de9682c LP |
2249 | return r; |
2250 | ||
d5099efc | 2251 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], NULL); |
613b411c | 2252 | if (r < 0) |
701cc384 | 2253 | return r; |
613b411c | 2254 | } |
87f0e418 | 2255 | |
613b411c LP |
2256 | q = set_put(u->dependencies[d], other); |
2257 | if (q < 0) | |
701cc384 | 2258 | return q; |
87f0e418 | 2259 | |
613b411c LP |
2260 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2261 | v = set_put(other->dependencies[inverse_table[d]], u); | |
2262 | if (v < 0) { | |
5de9682c LP |
2263 | r = v; |
2264 | goto fail; | |
2265 | } | |
613b411c | 2266 | } |
701cc384 LP |
2267 | |
2268 | if (add_reference) { | |
613b411c LP |
2269 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
2270 | if (w < 0) { | |
701cc384 LP |
2271 | r = w; |
2272 | goto fail; | |
2273 | } | |
2274 | ||
613b411c LP |
2275 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
2276 | if (r < 0) | |
701cc384 | 2277 | goto fail; |
87f0e418 LP |
2278 | } |
2279 | ||
c1e1601e | 2280 | unit_add_to_dbus_queue(u); |
87f0e418 | 2281 | return 0; |
701cc384 LP |
2282 | |
2283 | fail: | |
2284 | if (q > 0) | |
ac155bb8 | 2285 | set_remove(u->dependencies[d], other); |
701cc384 LP |
2286 | |
2287 | if (v > 0) | |
ac155bb8 | 2288 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
2289 | |
2290 | if (w > 0) | |
ac155bb8 | 2291 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
2292 | |
2293 | return r; | |
87f0e418 | 2294 | } |
0301abf4 | 2295 | |
2c966c03 LP |
2296 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
2297 | int r; | |
2298 | ||
2299 | assert(u); | |
2300 | ||
3f3cc397 LP |
2301 | r = unit_add_dependency(u, d, other, add_reference); |
2302 | if (r < 0) | |
2c966c03 LP |
2303 | return r; |
2304 | ||
3f3cc397 LP |
2305 | r = unit_add_dependency(u, e, other, add_reference); |
2306 | if (r < 0) | |
2c966c03 LP |
2307 | return r; |
2308 | ||
2309 | return 0; | |
2310 | } | |
2311 | ||
9e2f7c11 LP |
2312 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
2313 | char *s; | |
2314 | ||
2315 | assert(u); | |
2316 | assert(name || path); | |
8afbb8e1 | 2317 | assert(p); |
9e2f7c11 LP |
2318 | |
2319 | if (!name) | |
2b6bf07d | 2320 | name = basename(path); |
9e2f7c11 LP |
2321 | |
2322 | if (!unit_name_is_template(name)) { | |
2323 | *p = NULL; | |
2324 | return name; | |
2325 | } | |
2326 | ||
ac155bb8 MS |
2327 | if (u->instance) |
2328 | s = unit_name_replace_instance(name, u->instance); | |
9e2f7c11 | 2329 | else { |
ae018d9b | 2330 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2331 | |
8afbb8e1 LP |
2332 | i = unit_name_to_prefix(u->id); |
2333 | if (!i) | |
9e2f7c11 LP |
2334 | return NULL; |
2335 | ||
2336 | s = unit_name_replace_instance(name, i); | |
9e2f7c11 LP |
2337 | } |
2338 | ||
2339 | if (!s) | |
2340 | return NULL; | |
2341 | ||
2342 | *p = s; | |
2343 | return s; | |
2344 | } | |
2345 | ||
701cc384 | 2346 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
2347 | Unit *other; |
2348 | int r; | |
8afbb8e1 | 2349 | _cleanup_free_ char *s = NULL; |
09b6b09f | 2350 | |
9e2f7c11 LP |
2351 | assert(u); |
2352 | assert(name || path); | |
09b6b09f | 2353 | |
8afbb8e1 LP |
2354 | name = resolve_template(u, name, path, &s); |
2355 | if (!name) | |
9e2f7c11 | 2356 | return -ENOMEM; |
09b6b09f | 2357 | |
8afbb8e1 LP |
2358 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2359 | if (r < 0) | |
2360 | return r; | |
9e2f7c11 | 2361 | |
8afbb8e1 | 2362 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
2363 | } |
2364 | ||
2c966c03 | 2365 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
3f3cc397 | 2366 | _cleanup_free_ char *s = NULL; |
2c966c03 LP |
2367 | Unit *other; |
2368 | int r; | |
2c966c03 LP |
2369 | |
2370 | assert(u); | |
2371 | assert(name || path); | |
2372 | ||
3f3cc397 LP |
2373 | name = resolve_template(u, name, path, &s); |
2374 | if (!name) | |
2c966c03 LP |
2375 | return -ENOMEM; |
2376 | ||
3f3cc397 LP |
2377 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2378 | if (r < 0) | |
68eda4bd | 2379 | return r; |
2c966c03 | 2380 | |
3f3cc397 | 2381 | return unit_add_two_dependencies(u, d, e, other, add_reference); |
2c966c03 LP |
2382 | } |
2383 | ||
701cc384 | 2384 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
2385 | Unit *other; |
2386 | int r; | |
68eda4bd | 2387 | _cleanup_free_ char *s = NULL; |
bd77d0fc | 2388 | |
9e2f7c11 LP |
2389 | assert(u); |
2390 | assert(name || path); | |
bd77d0fc | 2391 | |
3f3cc397 LP |
2392 | name = resolve_template(u, name, path, &s); |
2393 | if (!name) | |
9e2f7c11 | 2394 | return -ENOMEM; |
bd77d0fc | 2395 | |
3f3cc397 LP |
2396 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2397 | if (r < 0) | |
68eda4bd | 2398 | return r; |
9e2f7c11 | 2399 | |
3f3cc397 | 2400 | return unit_add_dependency(other, d, u, add_reference); |
bd77d0fc LP |
2401 | } |
2402 | ||
2c966c03 LP |
2403 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
2404 | Unit *other; | |
2405 | int r; | |
68eda4bd | 2406 | _cleanup_free_ char *s = NULL; |
2c966c03 LP |
2407 | |
2408 | assert(u); | |
2409 | assert(name || path); | |
2410 | ||
3f3cc397 LP |
2411 | name = resolve_template(u, name, path, &s); |
2412 | if (!name) | |
2c966c03 LP |
2413 | return -ENOMEM; |
2414 | ||
3f3cc397 LP |
2415 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2416 | if (r < 0) | |
68eda4bd | 2417 | return r; |
2c966c03 | 2418 | |
3f3cc397 LP |
2419 | r = unit_add_two_dependencies(other, d, e, u, add_reference); |
2420 | if (r < 0) | |
68eda4bd | 2421 | return r; |
2c966c03 | 2422 | |
2c966c03 LP |
2423 | return r; |
2424 | } | |
2425 | ||
0301abf4 | 2426 | int set_unit_path(const char *p) { |
0301abf4 | 2427 | /* This is mostly for debug purposes */ |
cf7d80a5 | 2428 | if (setenv("SYSTEMD_UNIT_PATH", p, 0) < 0) |
26d04f86 | 2429 | return -errno; |
0301abf4 LP |
2430 | |
2431 | return 0; | |
2432 | } | |
88066b3a | 2433 | |
ea430986 | 2434 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2435 | assert(u); |
2436 | ||
ac155bb8 | 2437 | if (!u->id) |
04ade7d2 LP |
2438 | return NULL; |
2439 | ||
48899192 | 2440 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2441 | } |
2442 | ||
41f9172f | 2443 | char *unit_default_cgroup_path(Unit *u) { |
d7bd3de0 | 2444 | _cleanup_free_ char *escaped = NULL, *slice = NULL; |
a016b922 | 2445 | int r; |
5954c074 | 2446 | |
013b87c0 LP |
2447 | assert(u); |
2448 | ||
4ad49000 LP |
2449 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
2450 | return strdup(u->manager->cgroup_root); | |
2451 | ||
2452 | if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) { | |
a016b922 LP |
2453 | r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice); |
2454 | if (r < 0) | |
2455 | return NULL; | |
2456 | } | |
2457 | ||
d7bd3de0 LP |
2458 | escaped = cg_escape(u->id); |
2459 | if (!escaped) | |
5954c074 LP |
2460 | return NULL; |
2461 | ||
d7bd3de0 LP |
2462 | if (slice) |
2463 | return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL); | |
2464 | else | |
2465 | return strjoin(u->manager->cgroup_root, "/", escaped, NULL); | |
013b87c0 LP |
2466 | } |
2467 | ||
598459ce | 2468 | int unit_add_default_slice(Unit *u, CGroupContext *c) { |
a8833944 LP |
2469 | _cleanup_free_ char *b = NULL; |
2470 | const char *slice_name; | |
a016b922 LP |
2471 | Unit *slice; |
2472 | int r; | |
2473 | ||
2474 | assert(u); | |
598459ce | 2475 | assert(c); |
a016b922 | 2476 | |
9444b1f2 | 2477 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2478 | return 0; |
2479 | ||
a8833944 LP |
2480 | if (u->instance) { |
2481 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2482 | |
a8833944 LP |
2483 | /* Implicitly place all instantiated units in their |
2484 | * own per-template slice */ | |
2485 | ||
2486 | prefix = unit_name_to_prefix(u->id); | |
2487 | if (!prefix) | |
2488 | return -ENOMEM; | |
2489 | ||
2490 | /* The prefix is already escaped, but it might include | |
2491 | * "-" which has a special meaning for slice units, | |
2492 | * hence escape it here extra. */ | |
2493 | escaped = strreplace(prefix, "-", "\\x2d"); | |
2494 | if (!escaped) | |
2495 | return -ENOMEM; | |
2496 | ||
2497 | if (u->manager->running_as == SYSTEMD_SYSTEM) | |
2498 | b = strjoin("system-", escaped, ".slice", NULL); | |
2499 | else | |
2500 | b = strappend(escaped, ".slice"); | |
2501 | if (!b) | |
2502 | return -ENOMEM; | |
2503 | ||
2504 | slice_name = b; | |
2505 | } else | |
2506 | slice_name = | |
2507 | u->manager->running_as == SYSTEMD_SYSTEM | |
2508 | ? SPECIAL_SYSTEM_SLICE | |
2509 | : SPECIAL_ROOT_SLICE; | |
2510 | ||
2511 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2512 | if (r < 0) |
2513 | return r; | |
2514 | ||
2515 | unit_ref_set(&u->slice, slice); | |
2516 | return 0; | |
2517 | } | |
2518 | ||
9444b1f2 LP |
2519 | const char *unit_slice_name(Unit *u) { |
2520 | assert(u); | |
2521 | ||
2522 | if (!UNIT_ISSET(u->slice)) | |
2523 | return NULL; | |
2524 | ||
2525 | return UNIT_DEREF(u->slice)->id; | |
2526 | } | |
2527 | ||
f6ff8c29 | 2528 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2529 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2530 | int r; |
2531 | ||
2532 | assert(u); | |
2533 | assert(type); | |
2534 | assert(_found); | |
2535 | ||
78edb35a LP |
2536 | t = unit_name_change_suffix(u->id, type); |
2537 | if (!t) | |
f6ff8c29 LP |
2538 | return -ENOMEM; |
2539 | ||
2540 | assert(!unit_has_name(u, t)); | |
2541 | ||
ac155bb8 | 2542 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2543 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2544 | return r; |
2545 | } | |
2546 | ||
05e343b7 LP |
2547 | int unit_watch_bus_name(Unit *u, const char *name) { |
2548 | assert(u); | |
2549 | assert(name); | |
2550 | ||
2551 | /* Watch a specific name on the bus. We only support one unit | |
2552 | * watching each name for now. */ | |
2553 | ||
ac155bb8 | 2554 | return hashmap_put(u->manager->watch_bus, name, u); |
05e343b7 LP |
2555 | } |
2556 | ||
2557 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2558 | assert(u); | |
2559 | assert(name); | |
2560 | ||
ac155bb8 | 2561 | hashmap_remove_value(u->manager->watch_bus, name, u); |
05e343b7 LP |
2562 | } |
2563 | ||
a16e1123 LP |
2564 | bool unit_can_serialize(Unit *u) { |
2565 | assert(u); | |
2566 | ||
2567 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2568 | } | |
2569 | ||
6b78f9b4 | 2570 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2571 | int r; |
2572 | ||
2573 | assert(u); | |
2574 | assert(f); | |
2575 | assert(fds); | |
2576 | ||
9bdb98c5 LP |
2577 | if (unit_can_serialize(u)) { |
2578 | ExecRuntime *rt; | |
a16e1123 | 2579 | |
9bdb98c5 | 2580 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
2581 | if (r < 0) |
2582 | return r; | |
9bdb98c5 LP |
2583 | |
2584 | rt = unit_get_exec_runtime(u); | |
2585 | if (rt) { | |
2586 | r = exec_runtime_serialize(rt, u, f, fds); | |
2587 | if (r < 0) | |
2588 | return r; | |
2589 | } | |
e0209d83 MS |
2590 | } |
2591 | ||
ac155bb8 MS |
2592 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2593 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2594 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2595 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2596 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
59fccdc5 | 2597 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 2598 | |
ac155bb8 MS |
2599 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2600 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2601 | |
59fccdc5 LP |
2602 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
2603 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
2604 | ||
c2756a68 LP |
2605 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
2606 | ||
2607 | if (u->cgroup_path) | |
2608 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
2609 | ||
613b411c LP |
2610 | if (serialize_jobs) { |
2611 | if (u->job) { | |
2612 | fprintf(f, "job\n"); | |
2613 | job_serialize(u->job, f, fds); | |
2614 | } | |
2615 | ||
2616 | if (u->nop_job) { | |
2617 | fprintf(f, "job\n"); | |
2618 | job_serialize(u->nop_job, f, fds); | |
2619 | } | |
2620 | } | |
2621 | ||
a16e1123 LP |
2622 | /* End marker */ |
2623 | fputc('\n', f); | |
2624 | return 0; | |
2625 | } | |
2626 | ||
2627 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2628 | va_list ap; | |
2629 | ||
2630 | assert(u); | |
2631 | assert(f); | |
2632 | assert(key); | |
2633 | assert(format); | |
2634 | ||
2635 | fputs(key, f); | |
2636 | fputc('=', f); | |
2637 | ||
2638 | va_start(ap, format); | |
2639 | vfprintf(f, format, ap); | |
2640 | va_end(ap); | |
2641 | ||
2642 | fputc('\n', f); | |
2643 | } | |
2644 | ||
2645 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2646 | assert(u); | |
2647 | assert(f); | |
2648 | assert(key); | |
2649 | assert(value); | |
2650 | ||
2651 | fprintf(f, "%s=%s\n", key, value); | |
2652 | } | |
2653 | ||
2654 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
28b99ccd | 2655 | ExecRuntime **rt = NULL; |
9bdb98c5 | 2656 | size_t offset; |
a16e1123 LP |
2657 | int r; |
2658 | ||
2659 | assert(u); | |
2660 | assert(f); | |
2661 | assert(fds); | |
2662 | ||
613b411c LP |
2663 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2664 | if (offset > 0) | |
2665 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
2666 | ||
a16e1123 | 2667 | for (;;) { |
20c03b7b | 2668 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2669 | size_t k; |
2670 | ||
2671 | if (!fgets(line, sizeof(line), f)) { | |
2672 | if (feof(f)) | |
2673 | return 0; | |
2674 | return -errno; | |
2675 | } | |
2676 | ||
10f8e83c | 2677 | char_array_0(line); |
a16e1123 LP |
2678 | l = strstrip(line); |
2679 | ||
2680 | /* End marker */ | |
2681 | if (l[0] == 0) | |
2682 | return 0; | |
2683 | ||
2684 | k = strcspn(l, "="); | |
2685 | ||
2686 | if (l[k] == '=') { | |
2687 | l[k] = 0; | |
2688 | v = l+k+1; | |
2689 | } else | |
2690 | v = l+k; | |
2691 | ||
cca098b0 | 2692 | if (streq(l, "job")) { |
39a18c60 MS |
2693 | if (v[0] == '\0') { |
2694 | /* new-style serialized job */ | |
9c3349e2 LP |
2695 | Job *j; |
2696 | ||
2697 | j = job_new_raw(u); | |
39a18c60 MS |
2698 | if (!j) |
2699 | return -ENOMEM; | |
2700 | ||
2701 | r = job_deserialize(j, f, fds); | |
2702 | if (r < 0) { | |
2703 | job_free(j); | |
2704 | return r; | |
2705 | } | |
cca098b0 | 2706 | |
39a18c60 MS |
2707 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2708 | if (r < 0) { | |
2709 | job_free(j); | |
2710 | return r; | |
2711 | } | |
e0209d83 MS |
2712 | |
2713 | r = job_install_deserialized(j); | |
2714 | if (r < 0) { | |
2715 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2716 | job_free(j); | |
2717 | return r; | |
2718 | } | |
39a18c60 MS |
2719 | } else { |
2720 | /* legacy */ | |
9c3349e2 LP |
2721 | JobType type; |
2722 | ||
2723 | type = job_type_from_string(v); | |
39a18c60 MS |
2724 | if (type < 0) |
2725 | log_debug("Failed to parse job type value %s", v); | |
2726 | else | |
2727 | u->deserialized_job = type; | |
2728 | } | |
cca098b0 | 2729 | continue; |
8aaf019b | 2730 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2731 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2732 | continue; |
2733 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2734 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2735 | continue; |
2736 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2737 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2738 | continue; |
2739 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2740 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2741 | continue; |
2791a8f8 | 2742 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2743 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 2744 | continue; |
59fccdc5 LP |
2745 | } else if (streq(l, "assert-timestamp")) { |
2746 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
2747 | continue; | |
2791a8f8 LP |
2748 | } else if (streq(l, "condition-result")) { |
2749 | int b; | |
2750 | ||
c2756a68 LP |
2751 | b = parse_boolean(v); |
2752 | if (b < 0) | |
2791a8f8 LP |
2753 | log_debug("Failed to parse condition result value %s", v); |
2754 | else | |
ac155bb8 | 2755 | u->condition_result = b; |
efbac6d2 LP |
2756 | |
2757 | continue; | |
c2756a68 | 2758 | |
59fccdc5 LP |
2759 | } else if (streq(l, "assert-result")) { |
2760 | int b; | |
2761 | ||
2762 | b = parse_boolean(v); | |
2763 | if (b < 0) | |
2764 | log_debug("Failed to parse assert result value %s", v); | |
2765 | else | |
2766 | u->assert_result = b; | |
2767 | ||
2768 | continue; | |
2769 | ||
c2756a68 LP |
2770 | } else if (streq(l, "transient")) { |
2771 | int b; | |
2772 | ||
2773 | b = parse_boolean(v); | |
2774 | if (b < 0) | |
2775 | log_debug("Failed to parse transient bool %s", v); | |
2776 | else | |
2777 | u->transient = b; | |
2778 | ||
2779 | continue; | |
2780 | } else if (streq(l, "cgroup")) { | |
2781 | char *s; | |
2782 | ||
2783 | s = strdup(v); | |
f440e1bb | 2784 | if (!s) |
c2756a68 LP |
2785 | return -ENOMEM; |
2786 | ||
4e595329 ZJS |
2787 | if (u->cgroup_path) { |
2788 | void *p; | |
2789 | ||
2790 | p = hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
2791 | log_info("Removing cgroup_path %s from hashmap (%p)", | |
2792 | u->cgroup_path, p); | |
2793 | free(u->cgroup_path); | |
2794 | } | |
72673e86 | 2795 | |
4e595329 | 2796 | u->cgroup_path = s; |
b58b8e11 | 2797 | assert(hashmap_put(u->manager->cgroup_unit, s, u) == 1); |
4e595329 | 2798 | |
c2756a68 | 2799 | continue; |
8aaf019b | 2800 | } |
cca098b0 | 2801 | |
9bdb98c5 LP |
2802 | if (unit_can_serialize(u)) { |
2803 | if (rt) { | |
2804 | r = exec_runtime_deserialize_item(rt, u, l, v, fds); | |
2805 | if (r < 0) | |
2806 | return r; | |
2807 | if (r > 0) | |
2808 | continue; | |
2809 | } | |
2810 | ||
2811 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); | |
613b411c LP |
2812 | if (r < 0) |
2813 | return r; | |
613b411c | 2814 | } |
a16e1123 LP |
2815 | } |
2816 | } | |
2817 | ||
6e2ef85b LP |
2818 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2819 | Unit *device; | |
68eda4bd | 2820 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
2821 | int r; |
2822 | ||
2823 | assert(u); | |
2824 | ||
2825 | if (!what) | |
2826 | return 0; | |
2827 | ||
2828 | /* Adds in links to the device node that this unit is based on */ | |
2829 | ||
8407a5d0 | 2830 | if (!is_device_path(what)) |
6e2ef85b LP |
2831 | return 0; |
2832 | ||
35eb6b12 LP |
2833 | e = unit_name_from_path(what, ".device"); |
2834 | if (!e) | |
6e2ef85b LP |
2835 | return -ENOMEM; |
2836 | ||
ac155bb8 | 2837 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
68eda4bd | 2838 | |
6e2ef85b LP |
2839 | if (r < 0) |
2840 | return r; | |
2841 | ||
faa368e3 LP |
2842 | r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BINDS_TO, device, true); |
2843 | if (r < 0) | |
6e2ef85b LP |
2844 | return r; |
2845 | ||
faa368e3 LP |
2846 | if (wants) { |
2847 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2848 | if (r < 0) | |
6e2ef85b | 2849 | return r; |
faa368e3 | 2850 | } |
6e2ef85b LP |
2851 | |
2852 | return 0; | |
2853 | } | |
a16e1123 | 2854 | |
cca098b0 LP |
2855 | int unit_coldplug(Unit *u) { |
2856 | int r; | |
2857 | ||
2858 | assert(u); | |
2859 | ||
2860 | if (UNIT_VTABLE(u)->coldplug) | |
2861 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2862 | return r; | |
2863 | ||
39a18c60 MS |
2864 | if (u->job) { |
2865 | r = job_coldplug(u->job); | |
2866 | if (r < 0) | |
2867 | return r; | |
2868 | } else if (u->deserialized_job >= 0) { | |
2869 | /* legacy */ | |
2870 | r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL); | |
2871 | if (r < 0) | |
cca098b0 LP |
2872 | return r; |
2873 | ||
ac155bb8 | 2874 | u->deserialized_job = _JOB_TYPE_INVALID; |
cca098b0 LP |
2875 | } |
2876 | ||
2877 | return 0; | |
2878 | } | |
2879 | ||
49b1d377 | 2880 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
bcfce235 | 2881 | DISABLE_WARNING_FORMAT_NONLITERAL; |
127d5fd1 ZJS |
2882 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, |
2883 | status, unit_status_msg_format, unit_description(u)); | |
bcfce235 | 2884 | REENABLE_WARNING; |
49b1d377 MS |
2885 | } |
2886 | ||
45fb0699 | 2887 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
2888 | _cleanup_strv_free_ char **t = NULL; |
2889 | char **path; | |
1b64d026 | 2890 | struct stat st; |
ae7a7182 | 2891 | unsigned loaded_cnt, current_cnt; |
1b64d026 | 2892 | |
45fb0699 LP |
2893 | assert(u); |
2894 | ||
ac155bb8 | 2895 | if (u->fragment_path) { |
5f4b19f4 | 2896 | zero(st); |
ac155bb8 | 2897 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2898 | /* What, cannot access this anymore? */ |
2899 | return true; | |
45fb0699 | 2900 | |
ac155bb8 MS |
2901 | if (u->fragment_mtime > 0 && |
2902 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2903 | return true; |
2904 | } | |
2905 | ||
1b64d026 LP |
2906 | if (u->source_path) { |
2907 | zero(st); | |
2908 | if (stat(u->source_path, &st) < 0) | |
2909 | return true; | |
2910 | ||
2911 | if (u->source_mtime > 0 && | |
2912 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2913 | return true; | |
2914 | } | |
5f4b19f4 | 2915 | |
1a7f1b38 | 2916 | (void) unit_find_dropin_paths(u, &t); |
ae7a7182 OS |
2917 | loaded_cnt = strv_length(t); |
2918 | current_cnt = strv_length(u->dropin_paths); | |
2919 | ||
2920 | if (loaded_cnt == current_cnt) { | |
2921 | if (loaded_cnt == 0) | |
2922 | return false; | |
2923 | ||
2924 | if (strv_overlap(u->dropin_paths, t)) { | |
2925 | STRV_FOREACH(path, u->dropin_paths) { | |
2926 | zero(st); | |
2927 | if (stat(*path, &st) < 0) | |
2928 | return true; | |
2929 | ||
2930 | if (u->dropin_mtime > 0 && | |
2931 | timespec_load(&st.st_mtim) > u->dropin_mtime) | |
2932 | return true; | |
2933 | } | |
2934 | ||
2935 | return false; | |
2936 | } else | |
2937 | return true; | |
2938 | } else | |
2939 | return true; | |
45fb0699 LP |
2940 | } |
2941 | ||
fdf20a31 | 2942 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2943 | assert(u); |
2944 | ||
fdf20a31 MM |
2945 | if (UNIT_VTABLE(u)->reset_failed) |
2946 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2947 | } |
2948 | ||
a7f241db LP |
2949 | Unit *unit_following(Unit *u) { |
2950 | assert(u); | |
2951 | ||
2952 | if (UNIT_VTABLE(u)->following) | |
2953 | return UNIT_VTABLE(u)->following(u); | |
2954 | ||
2955 | return NULL; | |
2956 | } | |
2957 | ||
31afa0a4 | 2958 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
2959 | assert(u); |
2960 | ||
31afa0a4 LP |
2961 | /* This call does check the current state of the unit. It's |
2962 | * hence useful to be called from state change calls of the | |
2963 | * unit itself, where the state isn't updated yet. This is | |
2964 | * different from unit_inactive_or_pending() which checks both | |
2965 | * the current state and for a queued job. */ | |
18ffdfda | 2966 | |
31afa0a4 LP |
2967 | return u->job && u->job->type == JOB_STOP; |
2968 | } | |
2969 | ||
2970 | bool unit_inactive_or_pending(Unit *u) { | |
2971 | assert(u); | |
2972 | ||
2973 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 2974 | |
d956ac29 LP |
2975 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
2976 | return true; | |
2977 | ||
31afa0a4 | 2978 | if (unit_stop_pending(u)) |
18ffdfda LP |
2979 | return true; |
2980 | ||
2981 | return false; | |
2982 | } | |
2983 | ||
31afa0a4 | 2984 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
2985 | assert(u); |
2986 | ||
f60c2665 | 2987 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
2988 | |
2989 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2990 | return true; | |
2991 | ||
ac155bb8 MS |
2992 | if (u->job && |
2993 | (u->job->type == JOB_START || | |
2994 | u->job->type == JOB_RELOAD_OR_START || | |
2995 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
2996 | return true; |
2997 | ||
2998 | return false; | |
2999 | } | |
3000 | ||
718db961 | 3001 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3002 | assert(u); |
3003 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
3004 | assert(signo > 0); |
3005 | assert(signo < _NSIG); | |
3006 | ||
8a0867d6 LP |
3007 | if (!UNIT_VTABLE(u)->kill) |
3008 | return -ENOTSUP; | |
3009 | ||
c74f17d9 | 3010 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3011 | } |
3012 | ||
82659fd7 LP |
3013 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
3014 | Set *pid_set; | |
3015 | int r; | |
3016 | ||
d5099efc | 3017 | pid_set = set_new(NULL); |
82659fd7 LP |
3018 | if (!pid_set) |
3019 | return NULL; | |
3020 | ||
3021 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3022 | if (main_pid > 0) { | |
3023 | r = set_put(pid_set, LONG_TO_PTR(main_pid)); | |
3024 | if (r < 0) | |
3025 | goto fail; | |
3026 | } | |
3027 | ||
3028 | if (control_pid > 0) { | |
3029 | r = set_put(pid_set, LONG_TO_PTR(control_pid)); | |
3030 | if (r < 0) | |
3031 | goto fail; | |
3032 | } | |
3033 | ||
3034 | return pid_set; | |
3035 | ||
3036 | fail: | |
3037 | set_free(pid_set); | |
3038 | return NULL; | |
3039 | } | |
3040 | ||
d91c34f2 LP |
3041 | int unit_kill_common( |
3042 | Unit *u, | |
3043 | KillWho who, | |
3044 | int signo, | |
3045 | pid_t main_pid, | |
3046 | pid_t control_pid, | |
718db961 | 3047 | sd_bus_error *error) { |
d91c34f2 | 3048 | |
814cc562 MS |
3049 | int r = 0; |
3050 | ||
3051 | if (who == KILL_MAIN && main_pid <= 0) { | |
3052 | if (main_pid < 0) | |
7358dc02 | 3053 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
814cc562 | 3054 | else |
7358dc02 | 3055 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3056 | } |
3057 | ||
3058 | if (who == KILL_CONTROL && control_pid <= 0) { | |
3059 | if (control_pid < 0) | |
7358dc02 | 3060 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
814cc562 | 3061 | else |
7358dc02 | 3062 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3063 | } |
3064 | ||
3065 | if (who == KILL_CONTROL || who == KILL_ALL) | |
3066 | if (control_pid > 0) | |
3067 | if (kill(control_pid, signo) < 0) | |
3068 | r = -errno; | |
3069 | ||
3070 | if (who == KILL_MAIN || who == KILL_ALL) | |
3071 | if (main_pid > 0) | |
3072 | if (kill(main_pid, signo) < 0) | |
3073 | r = -errno; | |
3074 | ||
4ad49000 | 3075 | if (who == KILL_ALL && u->cgroup_path) { |
814cc562 MS |
3076 | _cleanup_set_free_ Set *pid_set = NULL; |
3077 | int q; | |
3078 | ||
82659fd7 LP |
3079 | /* Exclude the main/control pids from being killed via the cgroup */ |
3080 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3081 | if (!pid_set) |
3082 | return -ENOMEM; | |
3083 | ||
4ad49000 | 3084 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set); |
814cc562 MS |
3085 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
3086 | r = q; | |
3087 | } | |
3088 | ||
3089 | return r; | |
3090 | } | |
3091 | ||
6210e7fc LP |
3092 | int unit_following_set(Unit *u, Set **s) { |
3093 | assert(u); | |
3094 | assert(s); | |
3095 | ||
3096 | if (UNIT_VTABLE(u)->following_set) | |
3097 | return UNIT_VTABLE(u)->following_set(u, s); | |
3098 | ||
3099 | *s = NULL; | |
3100 | return 0; | |
3101 | } | |
3102 | ||
a4375746 LP |
3103 | UnitFileState unit_get_unit_file_state(Unit *u) { |
3104 | assert(u); | |
3105 | ||
ac155bb8 MS |
3106 | if (u->unit_file_state < 0 && u->fragment_path) |
3107 | u->unit_file_state = unit_file_get_state( | |
67445f4e | 3108 | u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
2b6bf07d | 3109 | NULL, basename(u->fragment_path)); |
a4375746 | 3110 | |
ac155bb8 | 3111 | return u->unit_file_state; |
a4375746 LP |
3112 | } |
3113 | ||
d2dc52db LP |
3114 | int unit_get_unit_file_preset(Unit *u) { |
3115 | assert(u); | |
3116 | ||
3117 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3118 | u->unit_file_preset = unit_file_query_preset( | |
3119 | u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, | |
3120 | NULL, basename(u->fragment_path)); | |
3121 | ||
3122 | return u->unit_file_preset; | |
3123 | } | |
3124 | ||
57020a3a LP |
3125 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
3126 | assert(ref); | |
3127 | assert(u); | |
3128 | ||
3129 | if (ref->unit) | |
3130 | unit_ref_unset(ref); | |
3131 | ||
3132 | ref->unit = u; | |
71fda00f | 3133 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
3134 | return u; |
3135 | } | |
3136 | ||
3137 | void unit_ref_unset(UnitRef *ref) { | |
3138 | assert(ref); | |
3139 | ||
3140 | if (!ref->unit) | |
3141 | return; | |
3142 | ||
71fda00f | 3143 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
3144 | ref->unit = NULL; |
3145 | } | |
3146 | ||
598459ce LP |
3147 | int unit_patch_contexts(Unit *u) { |
3148 | CGroupContext *cc; | |
3149 | ExecContext *ec; | |
cba6e062 LP |
3150 | unsigned i; |
3151 | int r; | |
3152 | ||
e06c73cc | 3153 | assert(u); |
e06c73cc | 3154 | |
598459ce LP |
3155 | /* Patch in the manager defaults into the exec and cgroup |
3156 | * contexts, _after_ the rest of the settings have been | |
3157 | * initialized */ | |
085afe36 | 3158 | |
598459ce LP |
3159 | ec = unit_get_exec_context(u); |
3160 | if (ec) { | |
3161 | /* This only copies in the ones that need memory */ | |
3162 | for (i = 0; i < _RLIMIT_MAX; i++) | |
3163 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
3164 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
3165 | if (!ec->rlimit[i]) | |
3166 | return -ENOMEM; | |
3167 | } | |
3168 | ||
3169 | if (u->manager->running_as == SYSTEMD_USER && | |
3170 | !ec->working_directory) { | |
3171 | ||
3172 | r = get_home_dir(&ec->working_directory); | |
3173 | if (r < 0) | |
3174 | return r; | |
4c08c824 LP |
3175 | |
3176 | /* Allow user services to run, even if the | |
3177 | * home directory is missing */ | |
3178 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
3179 | } |
3180 | ||
598459ce LP |
3181 | if (u->manager->running_as == SYSTEMD_USER && |
3182 | (ec->syscall_whitelist || | |
3183 | !set_isempty(ec->syscall_filter) || | |
3184 | !set_isempty(ec->syscall_archs) || | |
3185 | ec->address_families_whitelist || | |
3186 | !set_isempty(ec->address_families))) | |
3187 | ec->no_new_privileges = true; | |
e06c73cc | 3188 | |
598459ce LP |
3189 | if (ec->private_devices) |
3190 | ec->capability_bounding_set_drop |= (uint64_t) 1ULL << (uint64_t) CAP_MKNOD; | |
cba6e062 LP |
3191 | } |
3192 | ||
598459ce LP |
3193 | cc = unit_get_cgroup_context(u); |
3194 | if (cc) { | |
f513e420 | 3195 | |
598459ce LP |
3196 | if (ec && |
3197 | ec->private_devices && | |
3198 | cc->device_policy == CGROUP_AUTO) | |
3199 | cc->device_policy = CGROUP_CLOSED; | |
3200 | } | |
f1660f96 | 3201 | |
cba6e062 | 3202 | return 0; |
e06c73cc LP |
3203 | } |
3204 | ||
3ef63c31 LP |
3205 | ExecContext *unit_get_exec_context(Unit *u) { |
3206 | size_t offset; | |
3207 | assert(u); | |
3208 | ||
598459ce LP |
3209 | if (u->type < 0) |
3210 | return NULL; | |
3211 | ||
3ef63c31 LP |
3212 | offset = UNIT_VTABLE(u)->exec_context_offset; |
3213 | if (offset <= 0) | |
3214 | return NULL; | |
3215 | ||
3216 | return (ExecContext*) ((uint8_t*) u + offset); | |
3217 | } | |
3218 | ||
718db961 LP |
3219 | KillContext *unit_get_kill_context(Unit *u) { |
3220 | size_t offset; | |
3221 | assert(u); | |
3222 | ||
598459ce LP |
3223 | if (u->type < 0) |
3224 | return NULL; | |
3225 | ||
718db961 LP |
3226 | offset = UNIT_VTABLE(u)->kill_context_offset; |
3227 | if (offset <= 0) | |
3228 | return NULL; | |
3229 | ||
3230 | return (KillContext*) ((uint8_t*) u + offset); | |
3231 | } | |
3232 | ||
4ad49000 LP |
3233 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
3234 | size_t offset; | |
3235 | ||
598459ce LP |
3236 | if (u->type < 0) |
3237 | return NULL; | |
3238 | ||
4ad49000 LP |
3239 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
3240 | if (offset <= 0) | |
3241 | return NULL; | |
3242 | ||
3243 | return (CGroupContext*) ((uint8_t*) u + offset); | |
3244 | } | |
3245 | ||
613b411c LP |
3246 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
3247 | size_t offset; | |
3248 | ||
598459ce LP |
3249 | if (u->type < 0) |
3250 | return NULL; | |
3251 | ||
613b411c LP |
3252 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
3253 | if (offset <= 0) | |
3254 | return NULL; | |
3255 | ||
3256 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
3257 | } | |
3258 | ||
29686440 | 3259 | static int unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode, bool transient, char **dir) { |
26d04f86 | 3260 | if (u->manager->running_as == SYSTEMD_USER) { |
29686440 | 3261 | int r; |
26d04f86 | 3262 | |
718880ba SA |
3263 | if (mode == UNIT_PERSISTENT && !transient) |
3264 | r = user_config_home(dir); | |
3265 | else | |
4d5dec23 | 3266 | r = user_runtime_dir(dir); |
718880ba | 3267 | |
26d04f86 LP |
3268 | if (r == 0) |
3269 | return -ENOENT; | |
29686440 ZJS |
3270 | return r; |
3271 | } | |
26d04f86 | 3272 | |
29686440 ZJS |
3273 | if (mode == UNIT_PERSISTENT && !transient) |
3274 | *dir = strdup("/etc/systemd/system"); | |
8e2af478 | 3275 | else |
29686440 ZJS |
3276 | *dir = strdup("/run/systemd/system"); |
3277 | if (!*dir) | |
71645aca LP |
3278 | return -ENOMEM; |
3279 | ||
26d04f86 | 3280 | return 0; |
71645aca LP |
3281 | } |
3282 | ||
29686440 ZJS |
3283 | static int unit_drop_in_file(Unit *u, |
3284 | UnitSetPropertiesMode mode, const char *name, char **p, char **q) { | |
3285 | _cleanup_free_ char *dir = NULL; | |
3286 | int r; | |
3287 | ||
3288 | assert(u); | |
3289 | ||
3290 | r = unit_drop_in_dir(u, mode, u->transient, &dir); | |
3291 | if (r < 0) | |
3292 | return r; | |
3293 | ||
8eea8687 | 3294 | return drop_in_file(dir, u->id, 50, name, p, q); |
29686440 ZJS |
3295 | } |
3296 | ||
8e2af478 | 3297 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
29686440 | 3298 | |
adb76a70 | 3299 | _cleanup_free_ char *dir = NULL, *p = NULL, *q = NULL; |
26d04f86 | 3300 | int r; |
71645aca LP |
3301 | |
3302 | assert(u); | |
3303 | ||
6d235724 | 3304 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3305 | return 0; |
3306 | ||
29686440 | 3307 | r = unit_drop_in_dir(u, mode, u->transient, &dir); |
26d04f86 LP |
3308 | if (r < 0) |
3309 | return r; | |
71645aca | 3310 | |
adb76a70 WC |
3311 | r = write_drop_in(dir, u->id, 50, name, data); |
3312 | if (r < 0) | |
3313 | return r; | |
3314 | ||
3315 | r = drop_in_file(dir, u->id, 50, name, &p, &q); | |
3316 | if (r < 0) | |
3317 | return r; | |
3318 | ||
3319 | r = strv_extend(&u->dropin_paths, q); | |
3320 | if (r < 0) | |
3321 | return r; | |
3322 | ||
3323 | strv_sort(u->dropin_paths); | |
3324 | strv_uniq(u->dropin_paths); | |
3325 | ||
3326 | u->dropin_mtime = now(CLOCK_REALTIME); | |
3327 | ||
3328 | return 0; | |
26d04f86 | 3329 | } |
71645aca | 3330 | |
b9ec9359 LP |
3331 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3332 | _cleanup_free_ char *p = NULL; | |
3333 | va_list ap; | |
3334 | int r; | |
3335 | ||
3336 | assert(u); | |
3337 | assert(name); | |
3338 | assert(format); | |
3339 | ||
6d235724 | 3340 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3341 | return 0; |
3342 | ||
3343 | va_start(ap, format); | |
3344 | r = vasprintf(&p, format, ap); | |
3345 | va_end(ap); | |
3346 | ||
3347 | if (r < 0) | |
3348 | return -ENOMEM; | |
3349 | ||
3350 | return unit_write_drop_in(u, mode, name, p); | |
3351 | } | |
3352 | ||
3353 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
b42defe3 LP |
3354 | _cleanup_free_ char *ndata = NULL; |
3355 | ||
3356 | assert(u); | |
3357 | assert(name); | |
3358 | assert(data); | |
3359 | ||
3360 | if (!UNIT_VTABLE(u)->private_section) | |
3361 | return -EINVAL; | |
3362 | ||
6d235724 | 3363 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3364 | return 0; |
3365 | ||
b42defe3 LP |
3366 | ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL); |
3367 | if (!ndata) | |
3368 | return -ENOMEM; | |
3369 | ||
3370 | return unit_write_drop_in(u, mode, name, ndata); | |
3371 | } | |
3372 | ||
b9ec9359 LP |
3373 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3374 | _cleanup_free_ char *p = NULL; | |
3375 | va_list ap; | |
3376 | int r; | |
3377 | ||
3378 | assert(u); | |
3379 | assert(name); | |
3380 | assert(format); | |
3381 | ||
6d235724 | 3382 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3383 | return 0; |
3384 | ||
3385 | va_start(ap, format); | |
3386 | r = vasprintf(&p, format, ap); | |
3387 | va_end(ap); | |
3388 | ||
3389 | if (r < 0) | |
3390 | return -ENOMEM; | |
3391 | ||
3392 | return unit_write_drop_in_private(u, mode, name, p); | |
3393 | } | |
3394 | ||
8e2af478 | 3395 | int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) { |
26d04f86 LP |
3396 | _cleanup_free_ char *p = NULL, *q = NULL; |
3397 | int r; | |
71645aca | 3398 | |
26d04f86 | 3399 | assert(u); |
71645aca | 3400 | |
6d235724 | 3401 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3402 | return 0; |
3403 | ||
29686440 | 3404 | r = unit_drop_in_file(u, mode, name, &p, &q); |
6891529f ZJS |
3405 | if (r < 0) |
3406 | return r; | |
3407 | ||
71645aca | 3408 | if (unlink(q) < 0) |
241da328 | 3409 | r = errno == ENOENT ? 0 : -errno; |
26d04f86 | 3410 | else |
241da328 | 3411 | r = 1; |
71645aca LP |
3412 | |
3413 | rmdir(p); | |
26d04f86 | 3414 | return r; |
71645aca LP |
3415 | } |
3416 | ||
c2756a68 LP |
3417 | int unit_make_transient(Unit *u) { |
3418 | int r; | |
3419 | ||
3420 | assert(u); | |
3421 | ||
3422 | u->load_state = UNIT_STUB; | |
3423 | u->load_error = 0; | |
3424 | u->transient = true; | |
3425 | ||
3426 | free(u->fragment_path); | |
3427 | u->fragment_path = NULL; | |
3428 | ||
3429 | if (u->manager->running_as == SYSTEMD_USER) { | |
3430 | _cleanup_free_ char *c = NULL; | |
3431 | ||
4d5dec23 | 3432 | r = user_runtime_dir(&c); |
c2756a68 LP |
3433 | if (r < 0) |
3434 | return r; | |
3435 | if (r == 0) | |
3436 | return -ENOENT; | |
3437 | ||
3438 | u->fragment_path = strjoin(c, "/", u->id, NULL); | |
3439 | if (!u->fragment_path) | |
3440 | return -ENOMEM; | |
3441 | ||
3442 | mkdir_p(c, 0755); | |
3443 | } else { | |
3444 | u->fragment_path = strappend("/run/systemd/system/", u->id); | |
3445 | if (!u->fragment_path) | |
3446 | return -ENOMEM; | |
3447 | ||
3448 | mkdir_p("/run/systemd/system", 0755); | |
3449 | } | |
3450 | ||
3451 | return write_string_file_atomic_label(u->fragment_path, "# Transient stub"); | |
3452 | } | |
3453 | ||
cd2086fe LP |
3454 | int unit_kill_context( |
3455 | Unit *u, | |
3456 | KillContext *c, | |
db2cb23b | 3457 | KillOperation k, |
cd2086fe LP |
3458 | pid_t main_pid, |
3459 | pid_t control_pid, | |
3460 | bool main_pid_alien) { | |
3461 | ||
bc6aed7b | 3462 | int sig, wait_for_exit = false, r; |
cd2086fe LP |
3463 | |
3464 | assert(u); | |
3465 | assert(c); | |
3466 | ||
3467 | if (c->kill_mode == KILL_NONE) | |
3468 | return 0; | |
3469 | ||
db2cb23b UTL |
3470 | switch (k) { |
3471 | case KILL_KILL: | |
3472 | sig = SIGKILL; | |
3473 | break; | |
3474 | case KILL_ABORT: | |
3475 | sig = SIGABRT; | |
3476 | break; | |
3477 | case KILL_TERMINATE: | |
3478 | sig = c->kill_signal; | |
3479 | break; | |
3480 | default: | |
3481 | assert_not_reached("KillOperation unknown"); | |
3482 | } | |
cd2086fe LP |
3483 | |
3484 | if (main_pid > 0) { | |
3485 | r = kill_and_sigcont(main_pid, sig); | |
3486 | ||
3487 | if (r < 0 && r != -ESRCH) { | |
3488 | _cleanup_free_ char *comm = NULL; | |
3489 | get_process_comm(main_pid, &comm); | |
3490 | ||
31938a85 | 3491 | log_unit_warning_errno(u->id, r, "Failed to kill main process " PID_FMT " (%s): %m", main_pid, strna(comm)); |
82659fd7 | 3492 | } else { |
bc6aed7b LP |
3493 | if (!main_pid_alien) |
3494 | wait_for_exit = true; | |
82659fd7 | 3495 | |
db2cb23b | 3496 | if (c->send_sighup && k != KILL_KILL) |
82659fd7 LP |
3497 | kill(main_pid, SIGHUP); |
3498 | } | |
cd2086fe LP |
3499 | } |
3500 | ||
3501 | if (control_pid > 0) { | |
3502 | r = kill_and_sigcont(control_pid, sig); | |
3503 | ||
3504 | if (r < 0 && r != -ESRCH) { | |
3505 | _cleanup_free_ char *comm = NULL; | |
3506 | get_process_comm(control_pid, &comm); | |
3507 | ||
31938a85 | 3508 | log_unit_warning_errno(u->id, r, "Failed to kill control process " PID_FMT " (%s): %m", control_pid, strna(comm)); |
82659fd7 | 3509 | } else { |
cd2086fe | 3510 | wait_for_exit = true; |
82659fd7 | 3511 | |
db2cb23b | 3512 | if (c->send_sighup && k != KILL_KILL) |
82659fd7 LP |
3513 | kill(control_pid, SIGHUP); |
3514 | } | |
cd2086fe LP |
3515 | } |
3516 | ||
db2cb23b | 3517 | if ((c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL)) && u->cgroup_path) { |
cd2086fe LP |
3518 | _cleanup_set_free_ Set *pid_set = NULL; |
3519 | ||
82659fd7 LP |
3520 | /* Exclude the main/control pids from being killed via the cgroup */ |
3521 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
3522 | if (!pid_set) |
3523 | return -ENOMEM; | |
3524 | ||
4ad49000 | 3525 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, true, false, pid_set); |
cd2086fe LP |
3526 | if (r < 0) { |
3527 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
31938a85 | 3528 | log_unit_warning_errno(u->id, r, "Failed to kill control group: %m"); |
82659fd7 | 3529 | } else if (r > 0) { |
bc6aed7b | 3530 | |
743970d2 LP |
3531 | /* FIXME: For now, we will not wait for the |
3532 | * cgroup members to die, simply because | |
3533 | * cgroup notification is unreliable. It | |
3534 | * doesn't work at all in containers, and | |
3535 | * outside of containers it can be confused | |
3536 | * easily by leaving directories in the | |
3537 | * cgroup. */ | |
3538 | ||
3539 | /* wait_for_exit = true; */ | |
58ea275a | 3540 | |
db2cb23b | 3541 | if (c->send_sighup && k != KILL_KILL) { |
82659fd7 LP |
3542 | set_free(pid_set); |
3543 | ||
3544 | pid_set = unit_pid_set(main_pid, control_pid); | |
3545 | if (!pid_set) | |
3546 | return -ENOMEM; | |
3547 | ||
8190da36 | 3548 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, false, true, false, pid_set); |
82659fd7 LP |
3549 | } |
3550 | } | |
cd2086fe LP |
3551 | } |
3552 | ||
3553 | return wait_for_exit; | |
3554 | } | |
3555 | ||
a57f7e2c LP |
3556 | int unit_require_mounts_for(Unit *u, const char *path) { |
3557 | char prefix[strlen(path) + 1], *p; | |
3558 | int r; | |
3559 | ||
3560 | assert(u); | |
3561 | assert(path); | |
3562 | ||
3563 | /* Registers a unit for requiring a certain path and all its | |
3564 | * prefixes. We keep a simple array of these paths in the | |
3565 | * unit, since its usually short. However, we build a prefix | |
3566 | * table for all possible prefixes so that new appearing mount | |
3567 | * units can easily determine which units to make themselves a | |
3568 | * dependency of. */ | |
3569 | ||
70b64bd3 ZJS |
3570 | if (!path_is_absolute(path)) |
3571 | return -EINVAL; | |
3572 | ||
a57f7e2c LP |
3573 | p = strdup(path); |
3574 | if (!p) | |
3575 | return -ENOMEM; | |
3576 | ||
3577 | path_kill_slashes(p); | |
3578 | ||
a57f7e2c LP |
3579 | if (!path_is_safe(p)) { |
3580 | free(p); | |
3581 | return -EPERM; | |
3582 | } | |
3583 | ||
3584 | if (strv_contains(u->requires_mounts_for, p)) { | |
3585 | free(p); | |
3586 | return 0; | |
3587 | } | |
3588 | ||
6e18964d ZJS |
3589 | r = strv_consume(&u->requires_mounts_for, p); |
3590 | if (r < 0) | |
a57f7e2c | 3591 | return r; |
a57f7e2c LP |
3592 | |
3593 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
3594 | Set *x; | |
3595 | ||
3596 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
3597 | if (!x) { | |
3598 | char *q; | |
3599 | ||
3600 | if (!u->manager->units_requiring_mounts_for) { | |
d5099efc | 3601 | u->manager->units_requiring_mounts_for = hashmap_new(&string_hash_ops); |
a57f7e2c LP |
3602 | if (!u->manager->units_requiring_mounts_for) |
3603 | return -ENOMEM; | |
3604 | } | |
3605 | ||
3606 | q = strdup(prefix); | |
3607 | if (!q) | |
3608 | return -ENOMEM; | |
3609 | ||
d5099efc | 3610 | x = set_new(NULL); |
a57f7e2c LP |
3611 | if (!x) { |
3612 | free(q); | |
3613 | return -ENOMEM; | |
3614 | } | |
3615 | ||
3616 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
3617 | if (r < 0) { | |
3618 | free(q); | |
3619 | set_free(x); | |
3620 | return r; | |
3621 | } | |
3622 | } | |
3623 | ||
3624 | r = set_put(x, u); | |
3625 | if (r < 0) | |
3626 | return r; | |
3627 | } | |
3628 | ||
3629 | return 0; | |
3630 | } | |
3631 | ||
613b411c LP |
3632 | int unit_setup_exec_runtime(Unit *u) { |
3633 | ExecRuntime **rt; | |
3634 | size_t offset; | |
3635 | Iterator i; | |
3636 | Unit *other; | |
3637 | ||
3638 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3639 | assert(offset > 0); | |
3640 | ||
06b643e7 | 3641 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
3642 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
3643 | if (*rt) | |
3644 | return 0; | |
3645 | ||
3646 | /* Try to get it from somebody else */ | |
3647 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
3648 | ||
3649 | *rt = unit_get_exec_runtime(other); | |
3650 | if (*rt) { | |
3651 | exec_runtime_ref(*rt); | |
3652 | return 0; | |
3653 | } | |
3654 | } | |
3655 | ||
3656 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
3657 | } | |
3658 | ||
94f04347 LP |
3659 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
3660 | [UNIT_ACTIVE] = "active", | |
032ff4af | 3661 | [UNIT_RELOADING] = "reloading", |
94f04347 | 3662 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 3663 | [UNIT_FAILED] = "failed", |
94f04347 LP |
3664 | [UNIT_ACTIVATING] = "activating", |
3665 | [UNIT_DEACTIVATING] = "deactivating" | |
3666 | }; | |
3667 | ||
3668 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); |