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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" |
6482f626 | 49 | #include "formats-util.h" |
0b452006 | 50 | #include "process-util.h" |
87f0e418 LP |
51 | |
52 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
53 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 | 54 | [UNIT_SOCKET] = &socket_vtable, |
e821075a | 55 | [UNIT_BUSNAME] = &busname_vtable, |
87f0e418 | 56 | [UNIT_TARGET] = &target_vtable, |
e821075a | 57 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
87f0e418 LP |
58 | [UNIT_DEVICE] = &device_vtable, |
59 | [UNIT_MOUNT] = &mount_vtable, | |
60 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 61 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 62 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 63 | [UNIT_PATH] = &path_vtable, |
6c12b52e LP |
64 | [UNIT_SLICE] = &slice_vtable, |
65 | [UNIT_SCOPE] = &scope_vtable | |
87f0e418 LP |
66 | }; |
67 | ||
d1fab3fe ZJS |
68 | static int maybe_warn_about_dependency(const char *id, const char *other, UnitDependency dependency); |
69 | ||
7d17cfbc | 70 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
71 | Unit *u; |
72 | ||
73 | assert(m); | |
ac155bb8 | 74 | assert(size >= sizeof(Unit)); |
87f0e418 | 75 | |
7d17cfbc MS |
76 | u = malloc0(size); |
77 | if (!u) | |
87f0e418 LP |
78 | return NULL; |
79 | ||
d5099efc | 80 | u->names = set_new(&string_hash_ops); |
ac155bb8 | 81 | if (!u->names) { |
87f0e418 LP |
82 | free(u); |
83 | return NULL; | |
84 | } | |
85 | ||
ac155bb8 MS |
86 | u->manager = m; |
87 | u->type = _UNIT_TYPE_INVALID; | |
88 | u->deserialized_job = _JOB_TYPE_INVALID; | |
89 | u->default_dependencies = true; | |
90 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 91 | u->unit_file_preset = -1; |
d420282b | 92 | u->on_failure_job_mode = JOB_REPLACE; |
87f0e418 LP |
93 | |
94 | return u; | |
95 | } | |
96 | ||
f278026d LP |
97 | bool unit_has_name(Unit *u, const char *name) { |
98 | assert(u); | |
99 | assert(name); | |
100 | ||
ac155bb8 | 101 | return !!set_get(u->names, (char*) name); |
f278026d LP |
102 | } |
103 | ||
598459ce LP |
104 | static void unit_init(Unit *u) { |
105 | CGroupContext *cc; | |
106 | ExecContext *ec; | |
107 | KillContext *kc; | |
108 | ||
109 | assert(u); | |
110 | assert(u->manager); | |
111 | assert(u->type >= 0); | |
112 | ||
113 | cc = unit_get_cgroup_context(u); | |
114 | if (cc) { | |
115 | cgroup_context_init(cc); | |
116 | ||
117 | /* Copy in the manager defaults into the cgroup | |
118 | * context, _before_ the rest of the settings have | |
119 | * been initialized */ | |
120 | ||
121 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
122 | cc->blockio_accounting = u->manager->default_blockio_accounting; | |
123 | cc->memory_accounting = u->manager->default_memory_accounting; | |
124 | } | |
125 | ||
126 | ec = unit_get_exec_context(u); | |
127 | if (ec) | |
128 | exec_context_init(ec); | |
129 | ||
130 | kc = unit_get_kill_context(u); | |
131 | if (kc) | |
132 | kill_context_init(kc); | |
133 | ||
134 | if (UNIT_VTABLE(u)->init) | |
135 | UNIT_VTABLE(u)->init(u); | |
136 | } | |
137 | ||
87f0e418 | 138 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 139 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 140 | UnitType t; |
87f0e418 LP |
141 | int r; |
142 | ||
143 | assert(u); | |
144 | assert(text); | |
145 | ||
9e2f7c11 | 146 | if (unit_name_is_template(text)) { |
598459ce | 147 | |
ac155bb8 | 148 | if (!u->instance) |
9e2f7c11 | 149 | return -EINVAL; |
87f0e418 | 150 | |
ac155bb8 | 151 | s = unit_name_replace_instance(text, u->instance); |
9e2f7c11 LP |
152 | } else |
153 | s = strdup(text); | |
9e2f7c11 LP |
154 | if (!s) |
155 | return -ENOMEM; | |
87f0e418 | 156 | |
598459ce LP |
157 | if (!unit_name_is_valid(s, TEMPLATE_INVALID)) |
158 | return -EINVAL; | |
e537352b | 159 | |
9e2f7c11 | 160 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 161 | |
598459ce LP |
162 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
163 | return -EINVAL; | |
87f0e418 | 164 | |
e48614c4 ZJS |
165 | r = unit_name_to_instance(s, &i); |
166 | if (r < 0) | |
598459ce | 167 | return r; |
87f0e418 | 168 | |
598459ce LP |
169 | if (i && unit_vtable[t]->no_instances) |
170 | return -EINVAL; | |
9e2f7c11 | 171 | |
276c3e78 LP |
172 | /* Ensure that this unit is either instanced or not instanced, |
173 | * but not both. */ | |
598459ce LP |
174 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
175 | return -EINVAL; | |
9e2f7c11 LP |
176 | |
177 | if (unit_vtable[t]->no_alias && | |
ac155bb8 | 178 | !set_isempty(u->names) && |
598459ce LP |
179 | !set_get(u->names, s)) |
180 | return -EEXIST; | |
9e2f7c11 | 181 | |
598459ce LP |
182 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
183 | return -E2BIG; | |
4f0f902f | 184 | |
e48614c4 | 185 | r = set_put(u->names, s); |
756c09e6 | 186 | if (r <= 0) |
598459ce | 187 | return r; |
87f0e418 | 188 | |
e48614c4 ZJS |
189 | r = hashmap_put(u->manager->units, s, u); |
190 | if (r < 0) { | |
ac155bb8 | 191 | set_remove(u->names, s); |
598459ce | 192 | return r; |
87f0e418 LP |
193 | } |
194 | ||
ac155bb8 | 195 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
196 | u->type = t; |
197 | u->id = s; | |
198 | u->instance = i; | |
9e2f7c11 | 199 | |
71fda00f | 200 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 201 | |
598459ce | 202 | unit_init(u); |
87f0e418 | 203 | |
598459ce LP |
204 | i = NULL; |
205 | } | |
9e2f7c11 | 206 | |
598459ce | 207 | s = NULL; |
9e2f7c11 | 208 | |
598459ce LP |
209 | unit_add_to_dbus_queue(u); |
210 | return 0; | |
87f0e418 LP |
211 | } |
212 | ||
0ae97ec1 | 213 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 214 | _cleanup_free_ char *t = NULL; |
598459ce | 215 | char *s, *i; |
276c3e78 | 216 | int r; |
0ae97ec1 LP |
217 | |
218 | assert(u); | |
219 | assert(name); | |
220 | ||
9e2f7c11 LP |
221 | if (unit_name_is_template(name)) { |
222 | ||
ac155bb8 | 223 | if (!u->instance) |
9e2f7c11 LP |
224 | return -EINVAL; |
225 | ||
e48614c4 ZJS |
226 | t = unit_name_replace_instance(name, u->instance); |
227 | if (!t) | |
9e2f7c11 LP |
228 | return -ENOMEM; |
229 | ||
230 | name = t; | |
231 | } | |
232 | ||
0ae97ec1 | 233 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 234 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 235 | if (!s) |
0ae97ec1 LP |
236 | return -ENOENT; |
237 | ||
e48614c4 ZJS |
238 | r = unit_name_to_instance(s, &i); |
239 | if (r < 0) | |
276c3e78 LP |
240 | return r; |
241 | ||
ac155bb8 | 242 | u->id = s; |
276c3e78 | 243 | |
ac155bb8 MS |
244 | free(u->instance); |
245 | u->instance = i; | |
276c3e78 | 246 | |
c1e1601e | 247 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 248 | |
0ae97ec1 LP |
249 | return 0; |
250 | } | |
251 | ||
f50e0a01 LP |
252 | int unit_set_description(Unit *u, const char *description) { |
253 | char *s; | |
254 | ||
255 | assert(u); | |
256 | ||
8aec412f LP |
257 | if (isempty(description)) |
258 | s = NULL; | |
259 | else { | |
260 | s = strdup(description); | |
261 | if (!s) | |
262 | return -ENOMEM; | |
263 | } | |
f50e0a01 | 264 | |
ac155bb8 MS |
265 | free(u->description); |
266 | u->description = s; | |
c1e1601e LP |
267 | |
268 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
269 | return 0; |
270 | } | |
271 | ||
701cc384 | 272 | bool unit_check_gc(Unit *u) { |
a354329f | 273 | UnitActiveState state; |
701cc384 LP |
274 | assert(u); |
275 | ||
a354329f | 276 | if (u->job) |
701cc384 LP |
277 | return true; |
278 | ||
a354329f | 279 | if (u->nop_job) |
6c073082 LP |
280 | return true; |
281 | ||
a354329f LP |
282 | state = unit_active_state(u); |
283 | ||
284 | /* If the unit is inactive and failed and no job is queued for | |
285 | * it, then release its runtime resources */ | |
286 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && | |
287 | UNIT_VTABLE(u)->release_resources) | |
288 | UNIT_VTABLE(u)->release_resources(u); | |
289 | ||
290 | /* But we keep the unit object around for longer when it is | |
291 | * referenced or configured to not be gc'ed */ | |
292 | if (state != UNIT_INACTIVE) | |
701cc384 LP |
293 | return true; |
294 | ||
a354329f | 295 | if (UNIT_VTABLE(u)->no_gc) |
e0209d83 MS |
296 | return true; |
297 | ||
a354329f | 298 | if (u->no_gc) |
701cc384 LP |
299 | return true; |
300 | ||
9d576438 LP |
301 | if (u->refs) |
302 | return true; | |
303 | ||
701cc384 LP |
304 | if (UNIT_VTABLE(u)->check_gc) |
305 | if (UNIT_VTABLE(u)->check_gc(u)) | |
306 | return true; | |
307 | ||
308 | return false; | |
309 | } | |
310 | ||
87f0e418 LP |
311 | void unit_add_to_load_queue(Unit *u) { |
312 | assert(u); | |
ac155bb8 | 313 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 314 | |
ac155bb8 | 315 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
316 | return; |
317 | ||
71fda00f | 318 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 319 | u->in_load_queue = true; |
87f0e418 LP |
320 | } |
321 | ||
23a177ef LP |
322 | void unit_add_to_cleanup_queue(Unit *u) { |
323 | assert(u); | |
324 | ||
ac155bb8 | 325 | if (u->in_cleanup_queue) |
23a177ef LP |
326 | return; |
327 | ||
71fda00f | 328 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 329 | u->in_cleanup_queue = true; |
23a177ef LP |
330 | } |
331 | ||
701cc384 LP |
332 | void unit_add_to_gc_queue(Unit *u) { |
333 | assert(u); | |
334 | ||
ac155bb8 | 335 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
336 | return; |
337 | ||
338 | if (unit_check_gc(u)) | |
339 | return; | |
340 | ||
71fda00f | 341 | LIST_PREPEND(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 342 | u->in_gc_queue = true; |
701cc384 | 343 | |
ac155bb8 | 344 | u->manager->n_in_gc_queue ++; |
701cc384 LP |
345 | } |
346 | ||
c1e1601e LP |
347 | void unit_add_to_dbus_queue(Unit *u) { |
348 | assert(u); | |
ac155bb8 | 349 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 350 | |
ac155bb8 | 351 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
352 | return; |
353 | ||
a567261a | 354 | /* Shortcut things if nobody cares */ |
8f8f05a9 LP |
355 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
356 | set_isempty(u->manager->private_buses)) { | |
ac155bb8 | 357 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
358 | return; |
359 | } | |
360 | ||
71fda00f | 361 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 362 | u->in_dbus_queue = true; |
c1e1601e LP |
363 | } |
364 | ||
87f0e418 LP |
365 | static void bidi_set_free(Unit *u, Set *s) { |
366 | Iterator i; | |
367 | Unit *other; | |
368 | ||
369 | assert(u); | |
370 | ||
371 | /* Frees the set and makes sure we are dropped from the | |
372 | * inverse pointers */ | |
373 | ||
374 | SET_FOREACH(other, s, i) { | |
375 | UnitDependency d; | |
376 | ||
377 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 378 | set_remove(other->dependencies[d], u); |
701cc384 LP |
379 | |
380 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
381 | } |
382 | ||
383 | set_free(s); | |
384 | } | |
385 | ||
c2756a68 LP |
386 | static void unit_remove_transient(Unit *u) { |
387 | char **i; | |
388 | ||
389 | assert(u); | |
390 | ||
391 | if (!u->transient) | |
392 | return; | |
393 | ||
394 | if (u->fragment_path) | |
395 | unlink(u->fragment_path); | |
396 | ||
397 | STRV_FOREACH(i, u->dropin_paths) { | |
398 | _cleanup_free_ char *p = NULL; | |
399 | int r; | |
400 | ||
401 | unlink(*i); | |
402 | ||
403 | r = path_get_parent(*i, &p); | |
404 | if (r >= 0) | |
405 | rmdir(p); | |
406 | } | |
407 | } | |
408 | ||
a57f7e2c LP |
409 | static void unit_free_requires_mounts_for(Unit *u) { |
410 | char **j; | |
411 | ||
412 | STRV_FOREACH(j, u->requires_mounts_for) { | |
413 | char s[strlen(*j) + 1]; | |
414 | ||
415 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
416 | char *y; | |
417 | Set *x; | |
418 | ||
419 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
420 | if (!x) | |
421 | continue; | |
422 | ||
423 | set_remove(x, u); | |
424 | ||
425 | if (set_isempty(x)) { | |
426 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
427 | free(y); | |
428 | set_free(x); | |
429 | } | |
430 | } | |
431 | } | |
432 | ||
433 | strv_free(u->requires_mounts_for); | |
434 | u->requires_mounts_for = NULL; | |
435 | } | |
436 | ||
598459ce LP |
437 | static void unit_done(Unit *u) { |
438 | ExecContext *ec; | |
439 | CGroupContext *cc; | |
440 | ||
441 | assert(u); | |
442 | ||
443 | if (u->type < 0) | |
444 | return; | |
445 | ||
446 | if (UNIT_VTABLE(u)->done) | |
447 | UNIT_VTABLE(u)->done(u); | |
448 | ||
449 | ec = unit_get_exec_context(u); | |
450 | if (ec) | |
451 | exec_context_done(ec); | |
452 | ||
453 | cc = unit_get_cgroup_context(u); | |
454 | if (cc) | |
455 | cgroup_context_done(cc); | |
456 | } | |
457 | ||
87f0e418 LP |
458 | void unit_free(Unit *u) { |
459 | UnitDependency d; | |
460 | Iterator i; | |
461 | char *t; | |
462 | ||
463 | assert(u); | |
464 | ||
c2756a68 LP |
465 | if (u->manager->n_reloading <= 0) |
466 | unit_remove_transient(u); | |
467 | ||
c1e1601e LP |
468 | bus_unit_send_removed_signal(u); |
469 | ||
598459ce | 470 | unit_done(u); |
a013b84b | 471 | |
a57f7e2c LP |
472 | unit_free_requires_mounts_for(u); |
473 | ||
ac155bb8 MS |
474 | SET_FOREACH(t, u->names, i) |
475 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 476 | |
97e7d748 MS |
477 | if (u->job) { |
478 | Job *j = u->job; | |
479 | job_uninstall(j); | |
480 | job_free(j); | |
481 | } | |
964e0949 | 482 | |
e0209d83 MS |
483 | if (u->nop_job) { |
484 | Job *j = u->nop_job; | |
485 | job_uninstall(j); | |
486 | job_free(j); | |
487 | } | |
488 | ||
964e0949 | 489 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 490 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 491 | |
ac155bb8 | 492 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 493 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 494 | |
ac155bb8 | 495 | if (u->in_load_queue) |
71fda00f | 496 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 497 | |
ac155bb8 | 498 | if (u->in_dbus_queue) |
71fda00f | 499 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 500 | |
ac155bb8 | 501 | if (u->in_cleanup_queue) |
71fda00f | 502 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 503 | |
ac155bb8 | 504 | if (u->in_gc_queue) { |
71fda00f | 505 | LIST_REMOVE(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 506 | u->manager->n_in_gc_queue--; |
701cc384 LP |
507 | } |
508 | ||
4ad49000 | 509 | if (u->in_cgroup_queue) |
71fda00f | 510 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
87f0e418 | 511 | |
72673e86 LP |
512 | if (u->cgroup_path) { |
513 | hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
514 | free(u->cgroup_path); | |
515 | } | |
516 | ||
03455c28 | 517 | manager_update_failed_units(u->manager, u, false); |
db785129 | 518 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 519 | |
ac155bb8 | 520 | free(u->description); |
49dbfa7b | 521 | strv_free(u->documentation); |
ac155bb8 | 522 | free(u->fragment_path); |
1b64d026 | 523 | free(u->source_path); |
ae7a7182 | 524 | strv_free(u->dropin_paths); |
ac155bb8 | 525 | free(u->instance); |
87f0e418 | 526 | |
f189ab18 LP |
527 | free(u->job_timeout_reboot_arg); |
528 | ||
ac155bb8 | 529 | set_free_free(u->names); |
87f0e418 | 530 | |
a911bb9a LP |
531 | unit_unwatch_all_pids(u); |
532 | ||
ac155bb8 | 533 | condition_free_list(u->conditions); |
59fccdc5 | 534 | condition_free_list(u->asserts); |
52661efd | 535 | |
702a2d8f LP |
536 | unit_ref_unset(&u->slice); |
537 | ||
ac155bb8 MS |
538 | while (u->refs) |
539 | unit_ref_unset(u->refs); | |
57020a3a | 540 | |
87f0e418 LP |
541 | free(u); |
542 | } | |
543 | ||
544 | UnitActiveState unit_active_state(Unit *u) { | |
545 | assert(u); | |
546 | ||
ac155bb8 | 547 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
548 | return unit_active_state(unit_follow_merge(u)); |
549 | ||
550 | /* After a reload it might happen that a unit is not correctly | |
551 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 552 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
553 | |
554 | return UNIT_VTABLE(u)->active_state(u); | |
555 | } | |
556 | ||
10a94420 LP |
557 | const char* unit_sub_state_to_string(Unit *u) { |
558 | assert(u); | |
559 | ||
560 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
561 | } | |
562 | ||
7c0b05e5 MS |
563 | static int complete_move(Set **s, Set **other) { |
564 | int r; | |
565 | ||
23a177ef LP |
566 | assert(s); |
567 | assert(other); | |
87f0e418 | 568 | |
23a177ef | 569 | if (!*other) |
7c0b05e5 | 570 | return 0; |
87f0e418 | 571 | |
7c0b05e5 MS |
572 | if (*s) { |
573 | r = set_move(*s, *other); | |
574 | if (r < 0) | |
575 | return r; | |
576 | } else { | |
23a177ef LP |
577 | *s = *other; |
578 | *other = NULL; | |
579 | } | |
7c0b05e5 MS |
580 | |
581 | return 0; | |
23a177ef | 582 | } |
87f0e418 | 583 | |
7c0b05e5 | 584 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
585 | char *t; |
586 | Iterator i; | |
7c0b05e5 | 587 | int r; |
87f0e418 | 588 | |
23a177ef LP |
589 | assert(u); |
590 | assert(other); | |
591 | ||
7c0b05e5 MS |
592 | r = complete_move(&u->names, &other->names); |
593 | if (r < 0) | |
594 | return r; | |
23a177ef | 595 | |
ac155bb8 MS |
596 | set_free_free(other->names); |
597 | other->names = NULL; | |
598 | other->id = NULL; | |
23a177ef | 599 | |
ac155bb8 MS |
600 | SET_FOREACH(t, u->names, i) |
601 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
602 | |
603 | return 0; | |
87f0e418 LP |
604 | } |
605 | ||
09a65f92 MS |
606 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
607 | unsigned n_reserve; | |
608 | ||
609 | assert(u); | |
610 | assert(other); | |
611 | assert(d < _UNIT_DEPENDENCY_MAX); | |
612 | ||
613 | /* | |
614 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 615 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
616 | * as a whole to u by complete_move(). |
617 | */ | |
618 | if (!u->dependencies[d]) | |
619 | return 0; | |
620 | ||
621 | /* merge_dependencies() will skip a u-on-u dependency */ | |
622 | n_reserve = set_size(other->dependencies[d]) - !!set_get(other->dependencies[d], u); | |
623 | ||
624 | return set_reserve(u->dependencies[d], n_reserve); | |
625 | } | |
626 | ||
d1fab3fe | 627 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
628 | Iterator i; |
629 | Unit *back; | |
87f0e418 | 630 | int r; |
23a177ef LP |
631 | |
632 | assert(u); | |
633 | assert(other); | |
634 | assert(d < _UNIT_DEPENDENCY_MAX); | |
635 | ||
83a95334 | 636 | /* Fix backwards pointers */ |
ac155bb8 | 637 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
638 | UnitDependency k; |
639 | ||
e48614c4 | 640 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff ZJS |
641 | /* Do not add dependencies between u and itself */ |
642 | if (back == u) { | |
d1fab3fe ZJS |
643 | if (set_remove(back->dependencies[k], other)) |
644 | maybe_warn_about_dependency(u->id, other_id, k); | |
e66047ff ZJS |
645 | } else { |
646 | r = set_remove_and_put(back->dependencies[k], other, u); | |
647 | if (r == -EEXIST) | |
648 | set_remove(back->dependencies[k], other); | |
649 | else | |
650 | assert(r >= 0 || r == -ENOENT); | |
651 | } | |
e48614c4 | 652 | } |
23a177ef LP |
653 | } |
654 | ||
e66047ff | 655 | /* Also do not move dependencies on u to itself */ |
d1fab3fe ZJS |
656 | back = set_remove(other->dependencies[d], u); |
657 | if (back) | |
658 | maybe_warn_about_dependency(u->id, other_id, d); | |
e66047ff | 659 | |
7c0b05e5 MS |
660 | /* The move cannot fail. The caller must have performed a reservation. */ |
661 | assert_se(complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); | |
23a177ef | 662 | |
ac155bb8 MS |
663 | set_free(other->dependencies[d]); |
664 | other->dependencies[d] = NULL; | |
23a177ef LP |
665 | } |
666 | ||
667 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 668 | UnitDependency d; |
d1fab3fe | 669 | const char *other_id = NULL; |
09a65f92 | 670 | int r; |
87f0e418 LP |
671 | |
672 | assert(u); | |
673 | assert(other); | |
ac155bb8 MS |
674 | assert(u->manager == other->manager); |
675 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 676 | |
cc916967 LP |
677 | other = unit_follow_merge(other); |
678 | ||
23a177ef LP |
679 | if (other == u) |
680 | return 0; | |
681 | ||
ac155bb8 | 682 | if (u->type != other->type) |
9e2f7c11 LP |
683 | return -EINVAL; |
684 | ||
ac155bb8 | 685 | if (!u->instance != !other->instance) |
87f0e418 LP |
686 | return -EINVAL; |
687 | ||
ac155bb8 | 688 | if (other->load_state != UNIT_STUB && |
c2756a68 | 689 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 690 | return -EEXIST; |
87f0e418 | 691 | |
ac155bb8 | 692 | if (other->job) |
819e213f LP |
693 | return -EEXIST; |
694 | ||
e0209d83 MS |
695 | if (other->nop_job) |
696 | return -EEXIST; | |
697 | ||
fdf20a31 | 698 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
699 | return -EEXIST; |
700 | ||
d1fab3fe ZJS |
701 | if (other->id) |
702 | other_id = strdupa(other->id); | |
703 | ||
09a65f92 MS |
704 | /* Make reservations to ensure merge_dependencies() won't fail */ |
705 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
706 | r = reserve_dependencies(u, other, d); | |
707 | /* | |
708 | * We don't rollback reservations if we fail. We don't have | |
709 | * a way to undo reservations. A reservation is not a leak. | |
710 | */ | |
711 | if (r < 0) | |
712 | return r; | |
713 | } | |
714 | ||
87f0e418 | 715 | /* Merge names */ |
7c0b05e5 MS |
716 | r = merge_names(u, other); |
717 | if (r < 0) | |
718 | return r; | |
87f0e418 | 719 | |
57020a3a | 720 | /* Redirect all references */ |
ac155bb8 MS |
721 | while (other->refs) |
722 | unit_ref_set(other->refs, u); | |
57020a3a | 723 | |
87f0e418 LP |
724 | /* Merge dependencies */ |
725 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 726 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 727 | |
ac155bb8 MS |
728 | other->load_state = UNIT_MERGED; |
729 | other->merged_into = u; | |
23a177ef | 730 | |
3616a49c LP |
731 | /* If there is still some data attached to the other node, we |
732 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 733 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
734 | if (UNIT_VTABLE(other)->done) |
735 | UNIT_VTABLE(other)->done(other); | |
736 | ||
737 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
738 | unit_add_to_cleanup_queue(other); |
739 | ||
740 | return 0; | |
741 | } | |
742 | ||
743 | int unit_merge_by_name(Unit *u, const char *name) { | |
744 | Unit *other; | |
9e2f7c11 | 745 | int r; |
68eda4bd | 746 | _cleanup_free_ char *s = NULL; |
23a177ef LP |
747 | |
748 | assert(u); | |
749 | assert(name); | |
750 | ||
9e2f7c11 | 751 | if (unit_name_is_template(name)) { |
ac155bb8 | 752 | if (!u->instance) |
9e2f7c11 LP |
753 | return -EINVAL; |
754 | ||
e48614c4 ZJS |
755 | s = unit_name_replace_instance(name, u->instance); |
756 | if (!s) | |
9e2f7c11 LP |
757 | return -ENOMEM; |
758 | ||
759 | name = s; | |
760 | } | |
761 | ||
c2756a68 LP |
762 | other = manager_get_unit(u->manager, name); |
763 | if (!other) | |
9e2f7c11 LP |
764 | r = unit_add_name(u, name); |
765 | else | |
766 | r = unit_merge(u, other); | |
23a177ef | 767 | |
9e2f7c11 | 768 | return r; |
23a177ef LP |
769 | } |
770 | ||
771 | Unit* unit_follow_merge(Unit *u) { | |
772 | assert(u); | |
773 | ||
ac155bb8 MS |
774 | while (u->load_state == UNIT_MERGED) |
775 | assert_se(u = u->merged_into); | |
23a177ef LP |
776 | |
777 | return u; | |
778 | } | |
779 | ||
780 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
781 | int r; | |
782 | ||
783 | assert(u); | |
784 | assert(c); | |
785 | ||
36be24c8 ZJS |
786 | if (c->working_directory) { |
787 | r = unit_require_mounts_for(u, c->working_directory); | |
788 | if (r < 0) | |
789 | return r; | |
790 | } | |
791 | ||
792 | if (c->root_directory) { | |
793 | r = unit_require_mounts_for(u, c->root_directory); | |
794 | if (r < 0) | |
795 | return r; | |
796 | } | |
797 | ||
b46a529c LP |
798 | if (u->manager->running_as != SYSTEMD_SYSTEM) |
799 | return 0; | |
800 | ||
801 | if (c->private_tmp) { | |
802 | r = unit_require_mounts_for(u, "/tmp"); | |
803 | if (r < 0) | |
804 | return r; | |
805 | ||
806 | r = unit_require_mounts_for(u, "/var/tmp"); | |
807 | if (r < 0) | |
808 | return r; | |
809 | } | |
810 | ||
ecc6e2b8 LP |
811 | if (c->std_output != EXEC_OUTPUT_KMSG && |
812 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 813 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
814 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
815 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 816 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 817 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 818 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 819 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 820 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 821 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 822 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
823 | return 0; |
824 | ||
825 | /* If syslog or kernel logging is requested, make sure our own | |
826 | * logging daemon is run first. */ | |
827 | ||
b46a529c LP |
828 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); |
829 | if (r < 0) | |
830 | return r; | |
23a177ef | 831 | |
87f0e418 LP |
832 | return 0; |
833 | } | |
834 | ||
87f0e418 LP |
835 | const char *unit_description(Unit *u) { |
836 | assert(u); | |
837 | ||
ac155bb8 MS |
838 | if (u->description) |
839 | return u->description; | |
87f0e418 | 840 | |
ac155bb8 | 841 | return strna(u->id); |
87f0e418 LP |
842 | } |
843 | ||
844 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 845 | char *t, **j; |
87f0e418 LP |
846 | UnitDependency d; |
847 | Iterator i; | |
47be870b | 848 | const char *prefix2; |
173e3821 LP |
849 | char |
850 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
851 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
852 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
853 | timestamp4[FORMAT_TIMESTAMP_MAX], |
854 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 855 | Unit *following; |
eeaedb7c LP |
856 | _cleanup_set_free_ Set *following_set = NULL; |
857 | int r; | |
87f0e418 LP |
858 | |
859 | assert(u); | |
ac155bb8 | 860 | assert(u->type >= 0); |
87f0e418 | 861 | |
4c940960 | 862 | prefix = strempty(prefix); |
63c372cb | 863 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
864 | |
865 | fprintf(f, | |
40d50879 | 866 | "%s-> Unit %s:\n" |
87f0e418 | 867 | "%s\tDescription: %s\n" |
9e2f7c11 | 868 | "%s\tInstance: %s\n" |
87f0e418 | 869 | "%s\tUnit Load State: %s\n" |
2fad8195 | 870 | "%s\tUnit Active State: %s\n" |
173e3821 | 871 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 872 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 873 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 874 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 875 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 876 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 877 | "%s\tTransient: %s\n" |
4ad49000 LP |
878 | "%s\tSlice: %s\n" |
879 | "%s\tCGroup: %s\n" | |
880 | "%s\tCGroup realized: %s\n" | |
6414b7c9 DS |
881 | "%s\tCGroup mask: 0x%x\n" |
882 | "%s\tCGroup members mask: 0x%x\n", | |
ac155bb8 | 883 | prefix, u->id, |
87f0e418 | 884 | prefix, unit_description(u), |
ac155bb8 MS |
885 | prefix, strna(u->instance), |
886 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 887 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
888 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
889 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
890 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
891 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 892 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 893 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 894 | prefix, yes_no(u->transient), |
4ad49000 LP |
895 | prefix, strna(unit_slice_name(u)), |
896 | prefix, strna(u->cgroup_path), | |
897 | prefix, yes_no(u->cgroup_realized), | |
bc432dc7 | 898 | prefix, u->cgroup_realized_mask, |
6414b7c9 | 899 | prefix, u->cgroup_members_mask); |
0301abf4 | 900 | |
ac155bb8 | 901 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
902 | fprintf(f, "%s\tName: %s\n", prefix, t); |
903 | ||
49dbfa7b LP |
904 | STRV_FOREACH(j, u->documentation) |
905 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
906 | ||
eeaedb7c LP |
907 | following = unit_following(u); |
908 | if (following) | |
ac155bb8 | 909 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 910 | |
eeaedb7c LP |
911 | r = unit_following_set(u, &following_set); |
912 | if (r >= 0) { | |
913 | Unit *other; | |
914 | ||
915 | SET_FOREACH(other, following_set, i) | |
916 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
917 | } | |
918 | ||
ac155bb8 MS |
919 | if (u->fragment_path) |
920 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 921 | |
1b64d026 LP |
922 | if (u->source_path) |
923 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
924 | ||
ae7a7182 | 925 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 926 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 927 | |
ac155bb8 | 928 | if (u->job_timeout > 0) |
2fa4092c | 929 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 930 | |
f189ab18 LP |
931 | if (u->job_timeout_action != FAILURE_ACTION_NONE) |
932 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, failure_action_to_string(u->job_timeout_action)); | |
933 | ||
934 | if (u->job_timeout_reboot_arg) | |
935 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
936 | ||
59fccdc5 LP |
937 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
938 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 939 | |
ac155bb8 | 940 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
941 | fprintf(f, |
942 | "%s\tCondition Timestamp: %s\n" | |
943 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
944 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
945 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 946 | |
59fccdc5 LP |
947 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
948 | fprintf(f, | |
949 | "%s\tAssert Timestamp: %s\n" | |
950 | "%s\tAssert Result: %s\n", | |
951 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
952 | prefix, yes_no(u->assert_result)); | |
953 | ||
87f0e418 LP |
954 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
955 | Unit *other; | |
956 | ||
ac155bb8 MS |
957 | SET_FOREACH(other, u->dependencies[d], i) |
958 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
959 | } |
960 | ||
7c8fa05c | 961 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
962 | fprintf(f, |
963 | "%s\tRequiresMountsFor:", prefix); | |
964 | ||
965 | STRV_FOREACH(j, u->requires_mounts_for) | |
966 | fprintf(f, " %s", *j); | |
967 | ||
968 | fputs("\n", f); | |
969 | } | |
970 | ||
ac155bb8 | 971 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 972 | |
b0650475 | 973 | fprintf(f, |
a40eb732 | 974 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
975 | "%s\tRefuseManualStart: %s\n" |
976 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 977 | "%s\tDefaultDependencies: %s\n" |
d420282b | 978 | "%s\tOnFailureJobMode: %s\n" |
7a6000a6 LP |
979 | "%s\tIgnoreOnIsolate: %s\n" |
980 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
981 | prefix, yes_no(u->stop_when_unneeded), |
982 | prefix, yes_no(u->refuse_manual_start), | |
983 | prefix, yes_no(u->refuse_manual_stop), | |
984 | prefix, yes_no(u->default_dependencies), | |
d420282b | 985 | prefix, job_mode_to_string(u->on_failure_job_mode), |
ac155bb8 MS |
986 | prefix, yes_no(u->ignore_on_isolate), |
987 | prefix, yes_no(u->ignore_on_snapshot)); | |
988 | ||
23a177ef LP |
989 | if (UNIT_VTABLE(u)->dump) |
990 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 991 | |
ac155bb8 | 992 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
993 | fprintf(f, |
994 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
995 | prefix, u->merged_into->id); |
996 | else if (u->load_state == UNIT_ERROR) | |
997 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 998 | |
87f0e418 | 999 | |
ac155bb8 MS |
1000 | if (u->job) |
1001 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1002 | |
e0209d83 MS |
1003 | if (u->nop_job) |
1004 | job_dump(u->nop_job, f, prefix2); | |
1005 | ||
87f0e418 LP |
1006 | } |
1007 | ||
1008 | /* Common implementation for multiple backends */ | |
e537352b | 1009 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1010 | int r; |
1011 | ||
1012 | assert(u); | |
23a177ef | 1013 | |
e48614c4 | 1014 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1015 | r = unit_load_fragment(u); |
1016 | if (r < 0) | |
23a177ef LP |
1017 | return r; |
1018 | ||
ac155bb8 | 1019 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1020 | return -ENOENT; |
1021 | ||
1022 | /* Load drop-in directory data */ | |
4ad49000 LP |
1023 | r = unit_load_dropin(unit_follow_merge(u)); |
1024 | if (r < 0) | |
23a177ef LP |
1025 | return r; |
1026 | ||
1027 | return 0; | |
1028 | } | |
1029 | ||
1030 | /* Common implementation for multiple backends */ | |
e537352b | 1031 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1032 | int r; |
87f0e418 LP |
1033 | |
1034 | assert(u); | |
1035 | ||
23a177ef LP |
1036 | /* Same as unit_load_fragment_and_dropin(), but whether |
1037 | * something can be loaded or not doesn't matter. */ | |
1038 | ||
1039 | /* Load a .service file */ | |
4ad49000 LP |
1040 | r = unit_load_fragment(u); |
1041 | if (r < 0) | |
87f0e418 LP |
1042 | return r; |
1043 | ||
ac155bb8 MS |
1044 | if (u->load_state == UNIT_STUB) |
1045 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1046 | |
87f0e418 | 1047 | /* Load drop-in directory data */ |
4ad49000 LP |
1048 | r = unit_load_dropin(unit_follow_merge(u)); |
1049 | if (r < 0) | |
87f0e418 LP |
1050 | return r; |
1051 | ||
23a177ef | 1052 | return 0; |
87f0e418 LP |
1053 | } |
1054 | ||
bba34eed | 1055 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1056 | assert(u); |
1057 | assert(target); | |
1058 | ||
ac155bb8 | 1059 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1060 | return 0; |
1061 | ||
35b8ca3a | 1062 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1063 | * that loop check below is reliable */ |
ac155bb8 MS |
1064 | if (u->load_state != UNIT_LOADED || |
1065 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1066 | return 0; |
1067 | ||
21256a2b LP |
1068 | /* If either side wants no automatic dependencies, then let's |
1069 | * skip this */ | |
ac155bb8 MS |
1070 | if (!u->default_dependencies || |
1071 | !target->default_dependencies) | |
21256a2b LP |
1072 | return 0; |
1073 | ||
98bc2000 | 1074 | /* Don't create loops */ |
ac155bb8 | 1075 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1076 | return 0; |
1077 | ||
1078 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
1079 | } | |
1080 | ||
e954c9cf | 1081 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 1082 | |
21256a2b LP |
1083 | static const UnitDependency deps[] = { |
1084 | UNIT_REQUIRED_BY, | |
1085 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
1086 | UNIT_WANTED_BY, | |
1087 | UNIT_BOUND_BY | |
1088 | }; | |
1089 | ||
bba34eed | 1090 | Unit *target; |
98bc2000 | 1091 | Iterator i; |
21256a2b | 1092 | unsigned k; |
db57f3c6 | 1093 | int r = 0; |
98bc2000 LP |
1094 | |
1095 | assert(u); | |
1096 | ||
21256a2b | 1097 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
1098 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
1099 | r = unit_add_default_target_dependency(u, target); | |
1100 | if (r < 0) | |
21256a2b | 1101 | return r; |
a016b922 LP |
1102 | } |
1103 | ||
e954c9cf LP |
1104 | return r; |
1105 | } | |
4ad49000 | 1106 | |
e954c9cf LP |
1107 | static int unit_add_slice_dependencies(Unit *u) { |
1108 | assert(u); | |
b81884e7 | 1109 | |
e954c9cf LP |
1110 | if (!unit_get_cgroup_context(u)) |
1111 | return 0; | |
1112 | ||
1113 | if (UNIT_ISSET(u->slice)) | |
1114 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true); | |
1115 | ||
d1fab3fe ZJS |
1116 | if (streq(u->id, SPECIAL_ROOT_SLICE)) |
1117 | return 0; | |
1118 | ||
e954c9cf | 1119 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true); |
98bc2000 LP |
1120 | } |
1121 | ||
e954c9cf | 1122 | static int unit_add_mount_dependencies(Unit *u) { |
9588bc32 LP |
1123 | char **i; |
1124 | int r; | |
1125 | ||
1126 | assert(u); | |
1127 | ||
1128 | STRV_FOREACH(i, u->requires_mounts_for) { | |
1129 | char prefix[strlen(*i) + 1]; | |
1130 | ||
1131 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
1132 | Unit *m; | |
1133 | ||
1134 | r = manager_get_unit_by_path(u->manager, prefix, ".mount", &m); | |
1135 | if (r < 0) | |
1136 | return r; | |
1137 | if (r == 0) | |
1138 | continue; | |
1139 | if (m == u) | |
1140 | continue; | |
1141 | ||
1142 | if (m->load_state != UNIT_LOADED) | |
1143 | continue; | |
1144 | ||
1145 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1146 | if (r < 0) | |
1147 | return r; | |
1148 | ||
1149 | if (m->fragment_path) { | |
1150 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1151 | if (r < 0) | |
1152 | return r; | |
1153 | } | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | return 0; | |
1158 | } | |
1159 | ||
95ae05c0 WC |
1160 | static int unit_add_startup_units(Unit *u) { |
1161 | CGroupContext *c; | |
95ae05c0 WC |
1162 | |
1163 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1164 | if (!c) |
1165 | return 0; | |
1166 | ||
1167 | if (c->startup_cpu_shares == (unsigned long) -1 && | |
1168 | c->startup_blockio_weight == (unsigned long) -1) | |
1169 | return 0; | |
1170 | ||
756c09e6 | 1171 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1172 | } |
1173 | ||
87f0e418 LP |
1174 | int unit_load(Unit *u) { |
1175 | int r; | |
1176 | ||
1177 | assert(u); | |
1178 | ||
ac155bb8 | 1179 | if (u->in_load_queue) { |
71fda00f | 1180 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1181 | u->in_load_queue = false; |
87f0e418 LP |
1182 | } |
1183 | ||
ac155bb8 | 1184 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1185 | return -EINVAL; |
1186 | ||
ac155bb8 | 1187 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1188 | return 0; |
1189 | ||
c2756a68 LP |
1190 | if (UNIT_VTABLE(u)->load) { |
1191 | r = UNIT_VTABLE(u)->load(u); | |
1192 | if (r < 0) | |
87f0e418 | 1193 | goto fail; |
c2756a68 | 1194 | } |
23a177ef | 1195 | |
ac155bb8 | 1196 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1197 | r = -ENOENT; |
1198 | goto fail; | |
1199 | } | |
1200 | ||
7c8fa05c | 1201 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1202 | |
e954c9cf LP |
1203 | r = unit_add_target_dependencies(u); |
1204 | if (r < 0) | |
1205 | goto fail; | |
1206 | ||
1207 | r = unit_add_slice_dependencies(u); | |
1208 | if (r < 0) | |
1209 | goto fail; | |
c2756a68 | 1210 | |
e954c9cf | 1211 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1212 | if (r < 0) |
c2756a68 | 1213 | goto fail; |
7c8fa05c | 1214 | |
95ae05c0 WC |
1215 | r = unit_add_startup_units(u); |
1216 | if (r < 0) | |
1217 | goto fail; | |
1218 | ||
bc432dc7 | 1219 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
79008bdd | 1220 | log_unit_error(u->id, "More than one OnFailure= dependencies specified for %s but OnFailureJobMode=isolate set. Refusing.", u->id); |
c2756a68 LP |
1221 | r = -EINVAL; |
1222 | goto fail; | |
1223 | } | |
bc432dc7 LP |
1224 | |
1225 | unit_update_cgroup_members_masks(u); | |
f68319bb LP |
1226 | } |
1227 | ||
ac155bb8 | 1228 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1229 | |
1230 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1231 | unit_add_to_gc_queue(u); |
87f0e418 | 1232 | |
87f0e418 LP |
1233 | return 0; |
1234 | ||
1235 | fail: | |
c2756a68 | 1236 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1237 | u->load_error = r; |
c1e1601e | 1238 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1239 | unit_add_to_gc_queue(u); |
23a177ef | 1240 | |
79008bdd | 1241 | log_unit_debug(u->id, "Failed to load configuration for %s: %s", |
c1b6628d | 1242 | u->id, strerror(-r)); |
23a177ef | 1243 | |
87f0e418 LP |
1244 | return r; |
1245 | } | |
1246 | ||
49365733 LP |
1247 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1248 | Condition *c; | |
1249 | int triggered = -1; | |
1250 | ||
1251 | assert(u); | |
1252 | assert(to_string); | |
1253 | ||
1254 | /* If the condition list is empty, then it is true */ | |
1255 | if (!first) | |
1256 | return true; | |
1257 | ||
1258 | /* Otherwise, if all of the non-trigger conditions apply and | |
1259 | * if any of the trigger conditions apply (unless there are | |
1260 | * none) we return true */ | |
1261 | LIST_FOREACH(conditions, c, first) { | |
1262 | int r; | |
1263 | ||
1264 | r = condition_test(c); | |
1265 | if (r < 0) | |
79008bdd | 1266 | log_unit_warning(u->id, |
49365733 LP |
1267 | "Couldn't determine result for %s=%s%s%s for %s, assuming failed: %s", |
1268 | to_string(c->type), | |
1269 | c->trigger ? "|" : "", | |
1270 | c->negate ? "!" : "", | |
1271 | c->parameter, | |
1272 | u->id, | |
1273 | strerror(-r)); | |
1274 | else | |
79008bdd | 1275 | log_unit_debug(u->id, |
49365733 LP |
1276 | "%s=%s%s%s %s for %s.", |
1277 | to_string(c->type), | |
1278 | c->trigger ? "|" : "", | |
1279 | c->negate ? "!" : "", | |
1280 | c->parameter, | |
1281 | condition_result_to_string(c->result), | |
1282 | u->id); | |
1283 | ||
1284 | if (!c->trigger && r <= 0) | |
1285 | return false; | |
1286 | ||
1287 | if (c->trigger && triggered <= 0) | |
1288 | triggered = r > 0; | |
1289 | } | |
1290 | ||
1291 | return triggered != 0; | |
1292 | } | |
1293 | ||
9588bc32 | 1294 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1295 | assert(u); |
1296 | ||
ac155bb8 | 1297 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1298 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1299 | |
ac155bb8 | 1300 | return u->condition_result; |
90bbc946 LP |
1301 | } |
1302 | ||
59fccdc5 LP |
1303 | static bool unit_assert_test(Unit *u) { |
1304 | assert(u); | |
1305 | ||
1306 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1307 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1308 | |
1309 | return u->assert_result; | |
1310 | } | |
1311 | ||
44a6b1b6 | 1312 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
c6918296 | 1313 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1314 | |
1315 | assert(u); | |
1316 | assert(t >= 0); | |
1317 | assert(t < _JOB_TYPE_MAX); | |
1318 | ||
1319 | if (t != JOB_START && t != JOB_STOP) | |
1320 | return NULL; | |
c6918296 MS |
1321 | |
1322 | format_table = &UNIT_VTABLE(u)->status_message_formats; | |
1323 | if (!format_table) | |
877d54e9 LP |
1324 | return NULL; |
1325 | ||
1326 | return format_table->starting_stopping[t == JOB_STOP]; | |
1327 | } | |
1328 | ||
44a6b1b6 | 1329 | _pure_ static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) { |
877d54e9 LP |
1330 | const char *format; |
1331 | ||
1332 | assert(u); | |
1333 | assert(t >= 0); | |
1334 | assert(t < _JOB_TYPE_MAX); | |
1335 | ||
1336 | format = unit_get_status_message_format(u, t); | |
1337 | if (format) | |
1338 | return format; | |
1339 | ||
1340 | /* Return generic strings */ | |
1341 | if (t == JOB_START) | |
1342 | return "Starting %s."; | |
1343 | else if (t == JOB_STOP) | |
1344 | return "Stopping %s."; | |
1345 | else if (t == JOB_RELOAD) | |
1346 | return "Reloading %s."; | |
1347 | ||
1348 | return NULL; | |
1349 | } | |
1350 | ||
1351 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1352 | const char *format; | |
1353 | ||
1354 | assert(u); | |
1355 | ||
1356 | /* We only print status messages for selected units on | |
1357 | * selected operations. */ | |
c6918296 | 1358 | |
877d54e9 | 1359 | format = unit_get_status_message_format(u, t); |
c6918296 MS |
1360 | if (!format) |
1361 | return; | |
1362 | ||
bcfce235 | 1363 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1364 | unit_status_printf(u, "", format); |
bcfce235 | 1365 | REENABLE_WARNING; |
c6918296 MS |
1366 | } |
1367 | ||
877d54e9 LP |
1368 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
1369 | const char *format; | |
1370 | char buf[LINE_MAX]; | |
1371 | sd_id128_t mid; | |
1372 | ||
1373 | assert(u); | |
1374 | ||
1375 | if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD) | |
1376 | return; | |
1377 | ||
81270860 LP |
1378 | if (log_on_console()) |
1379 | return; | |
1380 | ||
877d54e9 LP |
1381 | /* We log status messages for all units and all operations. */ |
1382 | ||
1383 | format = unit_get_status_message_format_try_harder(u, t); | |
1384 | if (!format) | |
1385 | return; | |
1386 | ||
bcfce235 | 1387 | DISABLE_WARNING_FORMAT_NONLITERAL; |
877d54e9 | 1388 | snprintf(buf, sizeof(buf), format, unit_description(u)); |
bcfce235 | 1389 | REENABLE_WARNING; |
877d54e9 LP |
1390 | |
1391 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1392 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1393 | SD_MESSAGE_UNIT_RELOADING; | |
1394 | ||
e2cc6eca LP |
1395 | log_unit_struct(u->id, |
1396 | LOG_INFO, | |
1397 | LOG_MESSAGE_ID(mid), | |
1398 | LOG_MESSAGE("%s", buf), | |
c1b6628d | 1399 | NULL); |
877d54e9 | 1400 | } |
877d54e9 | 1401 | |
87f0e418 | 1402 | /* Errors: |
d5159713 LP |
1403 | * -EBADR: This unit type does not support starting. |
1404 | * -EALREADY: Unit is already started. | |
1405 | * -EAGAIN: An operation is already in progress. Retry later. | |
1406 | * -ECANCELED: Too many requests for now. | |
59fccdc5 | 1407 | * -EPROTO: Assert failed |
87f0e418 LP |
1408 | */ |
1409 | int unit_start(Unit *u) { | |
1410 | UnitActiveState state; | |
92ab323c | 1411 | Unit *following; |
82a2b6bb | 1412 | int r; |
87f0e418 LP |
1413 | |
1414 | assert(u); | |
1415 | ||
ac155bb8 | 1416 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1417 | return -EINVAL; |
1418 | ||
a82e5507 LP |
1419 | /* If this is already started, then this will succeed. Note |
1420 | * that this will even succeed if this unit is not startable | |
1421 | * by the user. This is relied on to detect when we need to | |
1422 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1423 | state = unit_active_state(u); |
1424 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1425 | return -EALREADY; | |
1426 | ||
a82e5507 LP |
1427 | /* If the conditions failed, don't do anything at all. If we |
1428 | * already are activating this call might still be useful to | |
1429 | * speed up activation in case there is some hold-off time, | |
1430 | * but we don't want to recheck the condition in that case. */ | |
1431 | if (state != UNIT_ACTIVATING && | |
1432 | !unit_condition_test(u)) { | |
79008bdd | 1433 | log_unit_debug(u->id, "Starting of %s requested but condition failed. Not starting unit.", u->id); |
52661efd LP |
1434 | return -EALREADY; |
1435 | } | |
1436 | ||
59fccdc5 LP |
1437 | /* If the asserts failed, fail the entire job */ |
1438 | if (state != UNIT_ACTIVATING && | |
1439 | !unit_assert_test(u)) { | |
79008bdd | 1440 | log_unit_debug(u->id, "Starting of %s requested but asserts failed.", u->id); |
59fccdc5 LP |
1441 | return -EPROTO; |
1442 | } | |
1443 | ||
92ab323c | 1444 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1445 | following = unit_following(u); |
1446 | if (following) { | |
79008bdd | 1447 | log_unit_debug(u->id, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1448 | return unit_start(following); |
1449 | } | |
1450 | ||
0faacd47 | 1451 | if (UNIT_VTABLE(u)->supported && !UNIT_VTABLE(u)->supported(u->manager)) |
15411c0c | 1452 | return -EOPNOTSUPP; |
0faacd47 | 1453 | |
92ab323c LP |
1454 | /* If it is stopped, but we cannot start it, then fail */ |
1455 | if (!UNIT_VTABLE(u)->start) | |
1456 | return -EBADR; | |
1457 | ||
87f0e418 LP |
1458 | /* We don't suppress calls to ->start() here when we are |
1459 | * already starting, to allow this request to be used as a | |
1460 | * "hurry up" call, for example when the unit is in some "auto | |
1461 | * restart" state where it waits for a holdoff timer to elapse | |
1462 | * before it will start again. */ | |
1463 | ||
c1e1601e | 1464 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1465 | |
82a2b6bb LP |
1466 | r = UNIT_VTABLE(u)->start(u); |
1467 | if (r <= 0) | |
1468 | return r; | |
1469 | ||
1470 | /* Log if the start function actually did something */ | |
1471 | unit_status_log_starting_stopping_reloading(u, JOB_START); | |
1472 | unit_status_print_starting_stopping(u, JOB_START); | |
1473 | return r; | |
87f0e418 LP |
1474 | } |
1475 | ||
1476 | bool unit_can_start(Unit *u) { | |
1477 | assert(u); | |
1478 | ||
1479 | return !!UNIT_VTABLE(u)->start; | |
1480 | } | |
1481 | ||
2528a7a6 LP |
1482 | bool unit_can_isolate(Unit *u) { |
1483 | assert(u); | |
1484 | ||
1485 | return unit_can_start(u) && | |
ac155bb8 | 1486 | u->allow_isolate; |
2528a7a6 LP |
1487 | } |
1488 | ||
87f0e418 LP |
1489 | /* Errors: |
1490 | * -EBADR: This unit type does not support stopping. | |
1491 | * -EALREADY: Unit is already stopped. | |
1492 | * -EAGAIN: An operation is already in progress. Retry later. | |
1493 | */ | |
1494 | int unit_stop(Unit *u) { | |
1495 | UnitActiveState state; | |
92ab323c | 1496 | Unit *following; |
82a2b6bb | 1497 | int r; |
87f0e418 LP |
1498 | |
1499 | assert(u); | |
1500 | ||
87f0e418 | 1501 | state = unit_active_state(u); |
fdf20a31 | 1502 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1503 | return -EALREADY; |
1504 | ||
0faacd47 LP |
1505 | following = unit_following(u); |
1506 | if (following) { | |
1507 | log_unit_debug(u->id, "Redirecting stop request from %s to %s.", u->id, following->id); | |
92ab323c LP |
1508 | return unit_stop(following); |
1509 | } | |
1510 | ||
7898b0cf LP |
1511 | if (!UNIT_VTABLE(u)->stop) |
1512 | return -EBADR; | |
1513 | ||
c1e1601e | 1514 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1515 | |
82a2b6bb LP |
1516 | r = UNIT_VTABLE(u)->stop(u); |
1517 | if (r <= 0) | |
1518 | return r; | |
1519 | ||
1520 | unit_status_log_starting_stopping_reloading(u, JOB_STOP); | |
1521 | unit_status_print_starting_stopping(u, JOB_STOP); | |
1522 | return r; | |
87f0e418 LP |
1523 | } |
1524 | ||
1525 | /* Errors: | |
1526 | * -EBADR: This unit type does not support reloading. | |
1527 | * -ENOEXEC: Unit is not started. | |
1528 | * -EAGAIN: An operation is already in progress. Retry later. | |
1529 | */ | |
1530 | int unit_reload(Unit *u) { | |
1531 | UnitActiveState state; | |
92ab323c | 1532 | Unit *following; |
82a2b6bb | 1533 | int r; |
87f0e418 LP |
1534 | |
1535 | assert(u); | |
1536 | ||
ac155bb8 | 1537 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1538 | return -EINVAL; |
1539 | ||
87f0e418 LP |
1540 | if (!unit_can_reload(u)) |
1541 | return -EBADR; | |
1542 | ||
1543 | state = unit_active_state(u); | |
e364ad06 | 1544 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1545 | return -EALREADY; |
1546 | ||
6a371e23 | 1547 | if (state != UNIT_ACTIVE) { |
0faacd47 | 1548 | log_unit_warning(u->id, "Unit %s cannot be reloaded because it is inactive.", u->id); |
87f0e418 | 1549 | return -ENOEXEC; |
6a371e23 | 1550 | } |
87f0e418 | 1551 | |
e48614c4 ZJS |
1552 | following = unit_following(u); |
1553 | if (following) { | |
0faacd47 | 1554 | log_unit_debug(u->id, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1555 | return unit_reload(following); |
1556 | } | |
1557 | ||
c1e1601e | 1558 | unit_add_to_dbus_queue(u); |
82a2b6bb LP |
1559 | |
1560 | r = UNIT_VTABLE(u)->reload(u); | |
1561 | if (r <= 0) | |
1562 | return r; | |
1563 | ||
1564 | unit_status_log_starting_stopping_reloading(u, JOB_RELOAD); | |
1565 | return r; | |
87f0e418 LP |
1566 | } |
1567 | ||
1568 | bool unit_can_reload(Unit *u) { | |
1569 | assert(u); | |
1570 | ||
1571 | if (!UNIT_VTABLE(u)->reload) | |
1572 | return false; | |
1573 | ||
1574 | if (!UNIT_VTABLE(u)->can_reload) | |
1575 | return true; | |
1576 | ||
1577 | return UNIT_VTABLE(u)->can_reload(u); | |
1578 | } | |
1579 | ||
b4a16b7b | 1580 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
1581 | Iterator i; |
1582 | Unit *other; | |
1583 | ||
1584 | assert(u); | |
1585 | ||
1586 | /* If this service shall be shut down when unneeded then do | |
1587 | * so. */ | |
1588 | ||
ac155bb8 | 1589 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1590 | return; |
1591 | ||
1592 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1593 | return; | |
1594 | ||
ac155bb8 | 1595 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i) |
31afa0a4 | 1596 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1597 | return; |
1598 | ||
ac155bb8 | 1599 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
31afa0a4 | 1600 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1601 | return; |
1602 | ||
ac155bb8 | 1603 | SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i) |
31afa0a4 | 1604 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1605 | return; |
1606 | ||
ac155bb8 | 1607 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
31afa0a4 | 1608 | if (unit_active_or_pending(other)) |
b81884e7 LP |
1609 | return; |
1610 | ||
79008bdd | 1611 | log_unit_info(u->id, "Unit %s is not needed anymore. Stopping.", u->id); |
f3bff0eb LP |
1612 | |
1613 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
ac155bb8 | 1614 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1615 | } |
1616 | ||
ff502445 LP |
1617 | static void unit_check_binds_to(Unit *u) { |
1618 | bool stop = false; | |
1619 | Unit *other; | |
1620 | Iterator i; | |
1621 | ||
1622 | assert(u); | |
1623 | ||
1624 | if (u->job) | |
1625 | return; | |
1626 | ||
1627 | if (unit_active_state(u) != UNIT_ACTIVE) | |
1628 | return; | |
1629 | ||
1630 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) { | |
1631 | if (other->job) | |
1632 | continue; | |
1633 | ||
1634 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1635 | continue; | |
1636 | ||
1637 | stop = true; | |
98f738b6 | 1638 | break; |
ff502445 LP |
1639 | } |
1640 | ||
1641 | if (!stop) | |
1642 | return; | |
1643 | ||
98f738b6 CW |
1644 | assert(other); |
1645 | log_unit_info(u->id, "Unit %s is bound to inactive unit %s. Stopping, too.", u->id, other->id); | |
ff502445 LP |
1646 | |
1647 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
1648 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); | |
1649 | } | |
1650 | ||
87f0e418 LP |
1651 | static void retroactively_start_dependencies(Unit *u) { |
1652 | Iterator i; | |
1653 | Unit *other; | |
1654 | ||
1655 | assert(u); | |
1656 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1657 | ||
ac155bb8 MS |
1658 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1659 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1660 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1661 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1662 | |
7f2cddae | 1663 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 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); |
87f0e418 | 1667 | |
ac155bb8 MS |
1668 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
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_FAIL, false, NULL, NULL); |
87f0e418 | 1672 | |
ac155bb8 MS |
1673 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], 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 | 1678 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1679 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1680 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1681 | |
ac155bb8 | 1682 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1683 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1684 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1685 | } |
1686 | ||
1687 | static void retroactively_stop_dependencies(Unit *u) { | |
1688 | Iterator i; | |
1689 | Unit *other; | |
1690 | ||
1691 | assert(u); | |
1692 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1693 | ||
b81884e7 | 1694 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1695 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1696 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1697 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1698 | } |
1699 | ||
1700 | static void check_unneeded_dependencies(Unit *u) { | |
1701 | Iterator i; | |
1702 | Unit *other; | |
1703 | ||
1704 | assert(u); | |
1705 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1706 | |
1707 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1708 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1709 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1710 | unit_check_unneeded(other); |
ac155bb8 | 1711 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1712 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1713 | unit_check_unneeded(other); |
ac155bb8 | 1714 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1715 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1716 | unit_check_unneeded(other); |
ac155bb8 | 1717 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1718 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1719 | unit_check_unneeded(other); |
ac155bb8 | 1720 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1721 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1722 | unit_check_unneeded(other); |
7f2cddae | 1723 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1724 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1725 | unit_check_unneeded(other); | |
87f0e418 LP |
1726 | } |
1727 | ||
3ecaa09b | 1728 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1729 | Unit *other; |
1730 | Iterator i; | |
1731 | ||
1732 | assert(u); | |
1733 | ||
ac155bb8 | 1734 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1735 | return; |
1736 | ||
79008bdd | 1737 | log_unit_info(u->id, "Triggering OnFailure= dependencies of %s.", u->id); |
222ae6a8 | 1738 | |
ac155bb8 | 1739 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1740 | int r; |
1741 | ||
d420282b | 1742 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, true, NULL, NULL); |
c1b6628d | 1743 | if (r < 0) |
31938a85 | 1744 | log_unit_error_errno(u->id, r, "Failed to enqueue OnFailure= job: %m"); |
222ae6a8 | 1745 | } |
c0daa706 LP |
1746 | } |
1747 | ||
3ecaa09b LP |
1748 | void unit_trigger_notify(Unit *u) { |
1749 | Unit *other; | |
1750 | Iterator i; | |
1751 | ||
1752 | assert(u); | |
1753 | ||
1754 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1755 | if (UNIT_VTABLE(other)->trigger_notify) | |
1756 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1757 | } | |
1758 | ||
e2f3b44c | 1759 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 1760 | Manager *m; |
7e6e7b06 | 1761 | bool unexpected; |
a096ed36 | 1762 | |
87f0e418 LP |
1763 | assert(u); |
1764 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1765 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1766 | |
8e471ccd LP |
1767 | /* Note that this is called for all low-level state changes, |
1768 | * even if they might map to the same high-level | |
865cc19a | 1769 | * UnitActiveState! That means that ns == os is an expected |
c5315881 | 1770 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1771 | * this function will be called too! */ |
87f0e418 | 1772 | |
546ac4f0 MS |
1773 | m = u->manager; |
1774 | ||
f755e3b7 | 1775 | /* Update timestamps for state changes */ |
546ac4f0 | 1776 | if (m->n_reloading <= 0) { |
bdbf9951 | 1777 | dual_timestamp ts; |
173e3821 | 1778 | |
bdbf9951 | 1779 | dual_timestamp_get(&ts); |
173e3821 | 1780 | |
bdbf9951 | 1781 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1782 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1783 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1784 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1785 | |
1786 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1787 | u->active_enter_timestamp = ts; |
bdbf9951 | 1788 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1789 | u->active_exit_timestamp = ts; |
bdbf9951 | 1790 | } |
87f0e418 | 1791 | |
865cc19a | 1792 | /* Keep track of failed units */ |
03455c28 | 1793 | manager_update_failed_units(u->manager, u, ns == UNIT_FAILED); |
f755e3b7 LP |
1794 | |
1795 | /* Make sure the cgroup is always removed when we become inactive */ | |
fdf20a31 | 1796 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
b1491eba | 1797 | unit_destroy_cgroup_if_empty(u); |
fb385181 | 1798 | |
9cd86184 | 1799 | /* Note that this doesn't apply to RemainAfterExit services exiting |
6f285378 | 1800 | * successfully, since there's no change of state in that case. Which is |
9cd86184 | 1801 | * why it is handled in service_set_state() */ |
7ed9f6cd | 1802 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
1803 | ExecContext *ec; |
1804 | ||
1805 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 1806 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 ZJS |
1807 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
1808 | m->n_on_console --; | |
1809 | ||
1810 | if (m->n_on_console == 0) | |
1811 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 1812 | m->no_console_output = false; |
31a7eb86 ZJS |
1813 | } else |
1814 | m->n_on_console ++; | |
7ed9f6cd MS |
1815 | } |
1816 | } | |
1817 | ||
ac155bb8 | 1818 | if (u->job) { |
7e6e7b06 | 1819 | unexpected = false; |
87f0e418 | 1820 | |
ac155bb8 | 1821 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1822 | |
1823 | /* So we reached a different state for this | |
1824 | * job. Let's see if we can run it now if it | |
1825 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1826 | job_add_to_run_queue(u->job); |
87f0e418 | 1827 | |
b410e6b9 | 1828 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1829 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1830 | * hence needs to invalidate jobs. */ |
87f0e418 | 1831 | |
ac155bb8 | 1832 | switch (u->job->type) { |
87f0e418 | 1833 | |
b410e6b9 LP |
1834 | case JOB_START: |
1835 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1836 | |
b410e6b9 | 1837 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1838 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1839 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1840 | unexpected = true; |
41b02ec7 | 1841 | |
fdf20a31 | 1842 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1843 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1844 | } |
87f0e418 | 1845 | |
b410e6b9 | 1846 | break; |
87f0e418 | 1847 | |
b410e6b9 LP |
1848 | case JOB_RELOAD: |
1849 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1850 | |
ac155bb8 | 1851 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1852 | if (ns == UNIT_ACTIVE) |
5273510e | 1853 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1854 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1855 | unexpected = true; |
41b02ec7 | 1856 | |
fdf20a31 | 1857 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1858 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1859 | } |
b410e6b9 | 1860 | } |
87f0e418 | 1861 | |
b410e6b9 | 1862 | break; |
87f0e418 | 1863 | |
b410e6b9 LP |
1864 | case JOB_STOP: |
1865 | case JOB_RESTART: | |
1866 | case JOB_TRY_RESTART: | |
87f0e418 | 1867 | |
fdf20a31 | 1868 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1869 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1870 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1871 | unexpected = true; |
5273510e | 1872 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1873 | } |
87f0e418 | 1874 | |
b410e6b9 | 1875 | break; |
87f0e418 | 1876 | |
b410e6b9 LP |
1877 | default: |
1878 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1879 | } |
87f0e418 | 1880 | |
7e6e7b06 LP |
1881 | } else |
1882 | unexpected = true; | |
1883 | ||
546ac4f0 | 1884 | if (m->n_reloading <= 0) { |
f3bff0eb | 1885 | |
bdbf9951 LP |
1886 | /* If this state change happened without being |
1887 | * requested by a job, then let's retroactively start | |
1888 | * or stop dependencies. We skip that step when | |
1889 | * deserializing, since we don't want to create any | |
1890 | * additional jobs just because something is already | |
1891 | * activated. */ | |
1892 | ||
1893 | if (unexpected) { | |
1894 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1895 | retroactively_start_dependencies(u); | |
1896 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1897 | retroactively_stop_dependencies(u); | |
1898 | } | |
5de9682c | 1899 | |
cd0504d0 | 1900 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 1901 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
1902 | check_unneeded_dependencies(u); |
1903 | ||
bdbf9951 | 1904 | if (ns != os && ns == UNIT_FAILED) { |
79008bdd | 1905 | log_unit_notice(u->id, "Unit %s entered failed state.", u->id); |
3ecaa09b | 1906 | unit_start_on_failure(u); |
cd6d0a45 | 1907 | } |
3b2775c5 | 1908 | } |
e537352b | 1909 | |
3b2775c5 LP |
1910 | /* Some names are special */ |
1911 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1912 | ||
1913 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
865cc19a | 1914 | /* The bus might have just become available, |
3b2775c5 LP |
1915 | * hence try to connect to it, if we aren't |
1916 | * yet connected. */ | |
546ac4f0 | 1917 | bus_init(m, true); |
3b2775c5 | 1918 | |
ac155bb8 | 1919 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1920 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
546ac4f0 | 1921 | m->n_reloading <= 0) { |
3b2775c5 | 1922 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 1923 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 1924 | u->in_audit = true; |
3b2775c5 | 1925 | } |
e983b760 | 1926 | |
3b2775c5 | 1927 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 1928 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 1929 | |
3b2775c5 | 1930 | } else { |
bdbf9951 | 1931 | |
3b2775c5 LP |
1932 | /* We don't care about D-Bus here, since we'll get an |
1933 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1934 | |
ac155bb8 | 1935 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1936 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1937 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
546ac4f0 | 1938 | m->n_reloading <= 0) { |
4927fcae | 1939 | |
3b2775c5 LP |
1940 | /* Hmm, if there was no start record written |
1941 | * write it now, so that we always have a nice | |
1942 | * pair */ | |
ac155bb8 | 1943 | if (!u->in_audit) { |
546ac4f0 | 1944 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 1945 | |
3b2775c5 | 1946 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 1947 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1948 | } else |
1949 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 1950 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1951 | |
ac155bb8 | 1952 | u->in_audit = false; |
cd6d0a45 | 1953 | } |
f278026d LP |
1954 | } |
1955 | ||
546ac4f0 | 1956 | manager_recheck_journal(m); |
3ecaa09b | 1957 | unit_trigger_notify(u); |
3b2775c5 | 1958 | |
ff502445 LP |
1959 | if (u->manager->n_reloading <= 0) { |
1960 | /* Maybe we finished startup and are now ready for | |
1961 | * being stopped because unneeded? */ | |
bf6dcfa6 | 1962 | unit_check_unneeded(u); |
c1e1601e | 1963 | |
ff502445 LP |
1964 | /* Maybe we finished startup, but something we needed |
1965 | * has vanished? Let's die then. (This happens when | |
1966 | * something BindsTo= to a Type=oneshot unit, as these | |
1967 | * units go directly from starting to inactive, | |
1968 | * without ever entering started.) */ | |
1969 | unit_check_binds_to(u); | |
1970 | } | |
1971 | ||
c1e1601e | 1972 | unit_add_to_dbus_queue(u); |
701cc384 | 1973 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1974 | } |
1975 | ||
87f0e418 | 1976 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
1977 | int q, r; |
1978 | ||
87f0e418 LP |
1979 | assert(u); |
1980 | assert(pid >= 1); | |
1981 | ||
5ba6985b LP |
1982 | /* Watch a specific PID. We only support one or two units |
1983 | * watching each PID for now, not more. */ | |
1984 | ||
d5099efc | 1985 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
1986 | if (r < 0) |
1987 | return r; | |
1988 | ||
d5099efc | 1989 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL); |
a911bb9a LP |
1990 | if (r < 0) |
1991 | return r; | |
1992 | ||
5ba6985b LP |
1993 | r = hashmap_put(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
1994 | if (r == -EEXIST) { | |
d5099efc | 1995 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL); |
5ba6985b LP |
1996 | if (r < 0) |
1997 | return r; | |
05e343b7 | 1998 | |
5ba6985b LP |
1999 | r = hashmap_put(u->manager->watch_pids2, LONG_TO_PTR(pid), u); |
2000 | } | |
a911bb9a | 2001 | |
5ba6985b | 2002 | q = set_put(u->pids, LONG_TO_PTR(pid)); |
a911bb9a LP |
2003 | if (q < 0) |
2004 | return q; | |
2005 | ||
2006 | return r; | |
87f0e418 LP |
2007 | } |
2008 | ||
2009 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
2010 | assert(u); | |
2011 | assert(pid >= 1); | |
2012 | ||
5ba6985b LP |
2013 | hashmap_remove_value(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
2014 | hashmap_remove_value(u->manager->watch_pids2, LONG_TO_PTR(pid), u); | |
a911bb9a LP |
2015 | set_remove(u->pids, LONG_TO_PTR(pid)); |
2016 | } | |
2017 | ||
bd44e61b LP |
2018 | void unit_unwatch_all_pids(Unit *u) { |
2019 | assert(u); | |
2020 | ||
2021 | while (!set_isempty(u->pids)) | |
2022 | unit_unwatch_pid(u, PTR_TO_LONG(set_first(u->pids))); | |
2023 | ||
2024 | set_free(u->pids); | |
2025 | u->pids = NULL; | |
2026 | } | |
2027 | ||
2028 | static int unit_watch_pids_in_path(Unit *u, const char *path) { | |
a911bb9a LP |
2029 | _cleanup_closedir_ DIR *d = NULL; |
2030 | _cleanup_fclose_ FILE *f = NULL; | |
2031 | int ret = 0, r; | |
2032 | ||
2033 | assert(u); | |
2034 | assert(path); | |
2035 | ||
2036 | /* Adds all PIDs from a specific cgroup path to the set of PIDs we watch. */ | |
2037 | ||
2038 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f); | |
2039 | if (r >= 0) { | |
2040 | pid_t pid; | |
2041 | ||
2042 | while ((r = cg_read_pid(f, &pid)) > 0) { | |
2043 | r = unit_watch_pid(u, pid); | |
2044 | if (r < 0 && ret >= 0) | |
2045 | ret = r; | |
2046 | } | |
2047 | if (r < 0 && ret >= 0) | |
2048 | ret = r; | |
2049 | ||
2050 | } else if (ret >= 0) | |
2051 | ret = r; | |
2052 | ||
2053 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d); | |
2054 | if (r >= 0) { | |
2055 | char *fn; | |
2056 | ||
2057 | while ((r = cg_read_subgroup(d, &fn)) > 0) { | |
2058 | _cleanup_free_ char *p = NULL; | |
2059 | ||
2060 | p = strjoin(path, "/", fn, NULL); | |
2061 | free(fn); | |
2062 | ||
2063 | if (!p) | |
2064 | return -ENOMEM; | |
2065 | ||
bd44e61b | 2066 | r = unit_watch_pids_in_path(u, p); |
a911bb9a LP |
2067 | if (r < 0 && ret >= 0) |
2068 | ret = r; | |
2069 | } | |
2070 | if (r < 0 && ret >= 0) | |
2071 | ret = r; | |
2072 | ||
2073 | } else if (ret >= 0) | |
2074 | ret = r; | |
2075 | ||
2076 | return ret; | |
2077 | } | |
2078 | ||
a911bb9a LP |
2079 | int unit_watch_all_pids(Unit *u) { |
2080 | assert(u); | |
2081 | ||
a911bb9a LP |
2082 | /* Adds all PIDs from our cgroup to the set of PIDs we watch */ |
2083 | ||
bd44e61b LP |
2084 | if (!u->cgroup_path) |
2085 | return -ENOENT; | |
a911bb9a | 2086 | |
bd44e61b | 2087 | return unit_watch_pids_in_path(u, u->cgroup_path); |
a911bb9a LP |
2088 | } |
2089 | ||
2090 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2091 | Iterator i; | |
2092 | void *e; | |
2093 | ||
2094 | assert(u); | |
2095 | ||
2096 | /* Cleans dead PIDs from our list */ | |
2097 | ||
2098 | SET_FOREACH(e, u->pids, i) { | |
2099 | pid_t pid = PTR_TO_LONG(e); | |
2100 | ||
2101 | if (pid == except1 || pid == except2) | |
2102 | continue; | |
2103 | ||
9f5650ae | 2104 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2105 | unit_unwatch_pid(u, pid); |
a911bb9a | 2106 | } |
87f0e418 LP |
2107 | } |
2108 | ||
87f0e418 LP |
2109 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2110 | assert(u); | |
2111 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2112 | ||
2113 | switch (j) { | |
2114 | ||
2115 | case JOB_VERIFY_ACTIVE: | |
2116 | case JOB_START: | |
57339f47 | 2117 | case JOB_STOP: |
e0209d83 | 2118 | case JOB_NOP: |
87f0e418 LP |
2119 | return true; |
2120 | ||
87f0e418 LP |
2121 | case JOB_RESTART: |
2122 | case JOB_TRY_RESTART: | |
2123 | return unit_can_start(u); | |
2124 | ||
2125 | case JOB_RELOAD: | |
2126 | return unit_can_reload(u); | |
2127 | ||
2128 | case JOB_RELOAD_OR_START: | |
2129 | return unit_can_reload(u) && unit_can_start(u); | |
2130 | ||
2131 | default: | |
2132 | assert_not_reached("Invalid job type"); | |
2133 | } | |
2134 | } | |
2135 | ||
d1fab3fe | 2136 | static int maybe_warn_about_dependency(const char *id, const char *other, UnitDependency dependency) { |
3f3cc397 LP |
2137 | assert(id); |
2138 | ||
d1fab3fe ZJS |
2139 | switch (dependency) { |
2140 | case UNIT_REQUIRES: | |
2141 | case UNIT_REQUIRES_OVERRIDABLE: | |
2142 | case UNIT_WANTS: | |
2143 | case UNIT_REQUISITE: | |
2144 | case UNIT_REQUISITE_OVERRIDABLE: | |
2145 | case UNIT_BINDS_TO: | |
2146 | case UNIT_PART_OF: | |
2147 | case UNIT_REQUIRED_BY: | |
2148 | case UNIT_REQUIRED_BY_OVERRIDABLE: | |
2149 | case UNIT_WANTED_BY: | |
2150 | case UNIT_BOUND_BY: | |
2151 | case UNIT_CONSISTS_OF: | |
2152 | case UNIT_REFERENCES: | |
2153 | case UNIT_REFERENCED_BY: | |
2154 | case UNIT_PROPAGATES_RELOAD_TO: | |
2155 | case UNIT_RELOAD_PROPAGATED_FROM: | |
2156 | case UNIT_JOINS_NAMESPACE_OF: | |
2157 | return 0; | |
2158 | ||
2159 | case UNIT_CONFLICTS: | |
2160 | case UNIT_CONFLICTED_BY: | |
2161 | case UNIT_BEFORE: | |
2162 | case UNIT_AFTER: | |
2163 | case UNIT_ON_FAILURE: | |
2164 | case UNIT_TRIGGERS: | |
2165 | case UNIT_TRIGGERED_BY: | |
2166 | if (streq_ptr(id, other)) | |
79008bdd | 2167 | log_unit_warning(id, "Dependency %s=%s dropped from unit %s", |
d1fab3fe ZJS |
2168 | unit_dependency_to_string(dependency), id, other); |
2169 | else | |
79008bdd | 2170 | log_unit_warning(id, "Dependency %s=%s dropped from unit %s merged into %s", |
d1fab3fe ZJS |
2171 | unit_dependency_to_string(dependency), id, |
2172 | strna(other), id); | |
2173 | return -EINVAL; | |
2174 | ||
2175 | case _UNIT_DEPENDENCY_MAX: | |
2176 | case _UNIT_DEPENDENCY_INVALID: | |
2177 | break; | |
2178 | } | |
3f3cc397 | 2179 | |
d1fab3fe ZJS |
2180 | assert_not_reached("Invalid dependency type"); |
2181 | } | |
2182 | ||
701cc384 | 2183 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
2184 | |
2185 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2186 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 2187 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
2188 | [UNIT_WANTS] = UNIT_WANTED_BY, |
2189 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 2190 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
7f2cddae | 2191 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2192 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
87f0e418 | 2193 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 2194 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 2195 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
7f2cddae | 2196 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2197 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2198 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2199 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2200 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2201 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2202 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2203 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2204 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2205 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2206 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2207 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2208 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2209 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2210 | }; |
701cc384 | 2211 | int r, q = 0, v = 0, w = 0; |
d1fab3fe | 2212 | Unit *orig_u = u, *orig_other = other; |
87f0e418 LP |
2213 | |
2214 | assert(u); | |
2215 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2216 | assert(other); |
2217 | ||
9f151f29 LP |
2218 | u = unit_follow_merge(u); |
2219 | other = unit_follow_merge(other); | |
2220 | ||
87f0e418 LP |
2221 | /* We won't allow dependencies on ourselves. We will not |
2222 | * consider them an error however. */ | |
d1fab3fe ZJS |
2223 | if (u == other) { |
2224 | maybe_warn_about_dependency(orig_u->id, orig_other->id, d); | |
87f0e418 | 2225 | return 0; |
d1fab3fe | 2226 | } |
87f0e418 | 2227 | |
d5099efc | 2228 | r = set_ensure_allocated(&u->dependencies[d], NULL); |
613b411c | 2229 | if (r < 0) |
87f0e418 LP |
2230 | return r; |
2231 | ||
613b411c | 2232 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
d5099efc | 2233 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], NULL); |
613b411c LP |
2234 | if (r < 0) |
2235 | return r; | |
2236 | } | |
2237 | ||
2238 | if (add_reference) { | |
d5099efc | 2239 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], NULL); |
613b411c | 2240 | if (r < 0) |
5de9682c LP |
2241 | return r; |
2242 | ||
d5099efc | 2243 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], NULL); |
613b411c | 2244 | if (r < 0) |
701cc384 | 2245 | return r; |
613b411c | 2246 | } |
87f0e418 | 2247 | |
613b411c LP |
2248 | q = set_put(u->dependencies[d], other); |
2249 | if (q < 0) | |
701cc384 | 2250 | return q; |
87f0e418 | 2251 | |
613b411c LP |
2252 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2253 | v = set_put(other->dependencies[inverse_table[d]], u); | |
2254 | if (v < 0) { | |
5de9682c LP |
2255 | r = v; |
2256 | goto fail; | |
2257 | } | |
613b411c | 2258 | } |
701cc384 LP |
2259 | |
2260 | if (add_reference) { | |
613b411c LP |
2261 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
2262 | if (w < 0) { | |
701cc384 LP |
2263 | r = w; |
2264 | goto fail; | |
2265 | } | |
2266 | ||
613b411c LP |
2267 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
2268 | if (r < 0) | |
701cc384 | 2269 | goto fail; |
87f0e418 LP |
2270 | } |
2271 | ||
c1e1601e | 2272 | unit_add_to_dbus_queue(u); |
87f0e418 | 2273 | return 0; |
701cc384 LP |
2274 | |
2275 | fail: | |
2276 | if (q > 0) | |
ac155bb8 | 2277 | set_remove(u->dependencies[d], other); |
701cc384 LP |
2278 | |
2279 | if (v > 0) | |
ac155bb8 | 2280 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
2281 | |
2282 | if (w > 0) | |
ac155bb8 | 2283 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
2284 | |
2285 | return r; | |
87f0e418 | 2286 | } |
0301abf4 | 2287 | |
2c966c03 LP |
2288 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
2289 | int r; | |
2290 | ||
2291 | assert(u); | |
2292 | ||
3f3cc397 LP |
2293 | r = unit_add_dependency(u, d, other, add_reference); |
2294 | if (r < 0) | |
2c966c03 LP |
2295 | return r; |
2296 | ||
3f3cc397 LP |
2297 | r = unit_add_dependency(u, e, other, add_reference); |
2298 | if (r < 0) | |
2c966c03 LP |
2299 | return r; |
2300 | ||
2301 | return 0; | |
2302 | } | |
2303 | ||
9e2f7c11 LP |
2304 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
2305 | char *s; | |
2306 | ||
2307 | assert(u); | |
2308 | assert(name || path); | |
8afbb8e1 | 2309 | assert(p); |
9e2f7c11 LP |
2310 | |
2311 | if (!name) | |
2b6bf07d | 2312 | name = basename(path); |
9e2f7c11 LP |
2313 | |
2314 | if (!unit_name_is_template(name)) { | |
2315 | *p = NULL; | |
2316 | return name; | |
2317 | } | |
2318 | ||
ac155bb8 MS |
2319 | if (u->instance) |
2320 | s = unit_name_replace_instance(name, u->instance); | |
9e2f7c11 | 2321 | else { |
ae018d9b | 2322 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2323 | |
8afbb8e1 LP |
2324 | i = unit_name_to_prefix(u->id); |
2325 | if (!i) | |
9e2f7c11 LP |
2326 | return NULL; |
2327 | ||
2328 | s = unit_name_replace_instance(name, i); | |
9e2f7c11 LP |
2329 | } |
2330 | ||
2331 | if (!s) | |
2332 | return NULL; | |
2333 | ||
2334 | *p = s; | |
2335 | return s; | |
2336 | } | |
2337 | ||
701cc384 | 2338 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
2339 | Unit *other; |
2340 | int r; | |
8afbb8e1 | 2341 | _cleanup_free_ char *s = NULL; |
09b6b09f | 2342 | |
9e2f7c11 LP |
2343 | assert(u); |
2344 | assert(name || path); | |
09b6b09f | 2345 | |
8afbb8e1 LP |
2346 | name = resolve_template(u, name, path, &s); |
2347 | if (!name) | |
9e2f7c11 | 2348 | return -ENOMEM; |
09b6b09f | 2349 | |
8afbb8e1 LP |
2350 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2351 | if (r < 0) | |
2352 | return r; | |
9e2f7c11 | 2353 | |
8afbb8e1 | 2354 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
2355 | } |
2356 | ||
2c966c03 | 2357 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
3f3cc397 | 2358 | _cleanup_free_ char *s = NULL; |
2c966c03 LP |
2359 | Unit *other; |
2360 | int r; | |
2c966c03 LP |
2361 | |
2362 | assert(u); | |
2363 | assert(name || path); | |
2364 | ||
3f3cc397 LP |
2365 | name = resolve_template(u, name, path, &s); |
2366 | if (!name) | |
2c966c03 LP |
2367 | return -ENOMEM; |
2368 | ||
3f3cc397 LP |
2369 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2370 | if (r < 0) | |
68eda4bd | 2371 | return r; |
2c966c03 | 2372 | |
3f3cc397 | 2373 | return unit_add_two_dependencies(u, d, e, other, add_reference); |
2c966c03 LP |
2374 | } |
2375 | ||
701cc384 | 2376 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
2377 | Unit *other; |
2378 | int r; | |
68eda4bd | 2379 | _cleanup_free_ char *s = NULL; |
bd77d0fc | 2380 | |
9e2f7c11 LP |
2381 | assert(u); |
2382 | assert(name || path); | |
bd77d0fc | 2383 | |
3f3cc397 LP |
2384 | name = resolve_template(u, name, path, &s); |
2385 | if (!name) | |
9e2f7c11 | 2386 | return -ENOMEM; |
bd77d0fc | 2387 | |
3f3cc397 LP |
2388 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2389 | if (r < 0) | |
68eda4bd | 2390 | return r; |
9e2f7c11 | 2391 | |
3f3cc397 | 2392 | return unit_add_dependency(other, d, u, add_reference); |
bd77d0fc LP |
2393 | } |
2394 | ||
2c966c03 LP |
2395 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
2396 | Unit *other; | |
2397 | int r; | |
68eda4bd | 2398 | _cleanup_free_ char *s = NULL; |
2c966c03 LP |
2399 | |
2400 | assert(u); | |
2401 | assert(name || path); | |
2402 | ||
3f3cc397 LP |
2403 | name = resolve_template(u, name, path, &s); |
2404 | if (!name) | |
2c966c03 LP |
2405 | return -ENOMEM; |
2406 | ||
3f3cc397 LP |
2407 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2408 | if (r < 0) | |
68eda4bd | 2409 | return r; |
2c966c03 | 2410 | |
3f3cc397 LP |
2411 | r = unit_add_two_dependencies(other, d, e, u, add_reference); |
2412 | if (r < 0) | |
68eda4bd | 2413 | return r; |
2c966c03 | 2414 | |
2c966c03 LP |
2415 | return r; |
2416 | } | |
2417 | ||
0301abf4 | 2418 | int set_unit_path(const char *p) { |
0301abf4 | 2419 | /* This is mostly for debug purposes */ |
cf7d80a5 | 2420 | if (setenv("SYSTEMD_UNIT_PATH", p, 0) < 0) |
26d04f86 | 2421 | return -errno; |
0301abf4 LP |
2422 | |
2423 | return 0; | |
2424 | } | |
88066b3a | 2425 | |
ea430986 | 2426 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2427 | assert(u); |
2428 | ||
ac155bb8 | 2429 | if (!u->id) |
04ade7d2 LP |
2430 | return NULL; |
2431 | ||
48899192 | 2432 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2433 | } |
2434 | ||
41f9172f | 2435 | char *unit_default_cgroup_path(Unit *u) { |
d7bd3de0 | 2436 | _cleanup_free_ char *escaped = NULL, *slice = NULL; |
a016b922 | 2437 | int r; |
5954c074 | 2438 | |
013b87c0 LP |
2439 | assert(u); |
2440 | ||
4ad49000 LP |
2441 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
2442 | return strdup(u->manager->cgroup_root); | |
2443 | ||
2444 | if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) { | |
a016b922 LP |
2445 | r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice); |
2446 | if (r < 0) | |
2447 | return NULL; | |
2448 | } | |
2449 | ||
d7bd3de0 LP |
2450 | escaped = cg_escape(u->id); |
2451 | if (!escaped) | |
5954c074 LP |
2452 | return NULL; |
2453 | ||
d7bd3de0 LP |
2454 | if (slice) |
2455 | return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL); | |
2456 | else | |
2457 | return strjoin(u->manager->cgroup_root, "/", escaped, NULL); | |
013b87c0 LP |
2458 | } |
2459 | ||
598459ce | 2460 | int unit_add_default_slice(Unit *u, CGroupContext *c) { |
a8833944 LP |
2461 | _cleanup_free_ char *b = NULL; |
2462 | const char *slice_name; | |
a016b922 LP |
2463 | Unit *slice; |
2464 | int r; | |
2465 | ||
2466 | assert(u); | |
598459ce | 2467 | assert(c); |
a016b922 | 2468 | |
9444b1f2 | 2469 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2470 | return 0; |
2471 | ||
a8833944 LP |
2472 | if (u->instance) { |
2473 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2474 | |
a8833944 LP |
2475 | /* Implicitly place all instantiated units in their |
2476 | * own per-template slice */ | |
2477 | ||
2478 | prefix = unit_name_to_prefix(u->id); | |
2479 | if (!prefix) | |
2480 | return -ENOMEM; | |
2481 | ||
2482 | /* The prefix is already escaped, but it might include | |
2483 | * "-" which has a special meaning for slice units, | |
2484 | * hence escape it here extra. */ | |
2485 | escaped = strreplace(prefix, "-", "\\x2d"); | |
2486 | if (!escaped) | |
2487 | return -ENOMEM; | |
2488 | ||
2489 | if (u->manager->running_as == SYSTEMD_SYSTEM) | |
2490 | b = strjoin("system-", escaped, ".slice", NULL); | |
2491 | else | |
2492 | b = strappend(escaped, ".slice"); | |
2493 | if (!b) | |
2494 | return -ENOMEM; | |
2495 | ||
2496 | slice_name = b; | |
2497 | } else | |
2498 | slice_name = | |
2499 | u->manager->running_as == SYSTEMD_SYSTEM | |
2500 | ? SPECIAL_SYSTEM_SLICE | |
2501 | : SPECIAL_ROOT_SLICE; | |
2502 | ||
2503 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2504 | if (r < 0) |
2505 | return r; | |
2506 | ||
2507 | unit_ref_set(&u->slice, slice); | |
2508 | return 0; | |
2509 | } | |
2510 | ||
9444b1f2 LP |
2511 | const char *unit_slice_name(Unit *u) { |
2512 | assert(u); | |
2513 | ||
2514 | if (!UNIT_ISSET(u->slice)) | |
2515 | return NULL; | |
2516 | ||
2517 | return UNIT_DEREF(u->slice)->id; | |
2518 | } | |
2519 | ||
f6ff8c29 | 2520 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2521 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2522 | int r; |
2523 | ||
2524 | assert(u); | |
2525 | assert(type); | |
2526 | assert(_found); | |
2527 | ||
78edb35a LP |
2528 | t = unit_name_change_suffix(u->id, type); |
2529 | if (!t) | |
f6ff8c29 LP |
2530 | return -ENOMEM; |
2531 | ||
2532 | assert(!unit_has_name(u, t)); | |
2533 | ||
ac155bb8 | 2534 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2535 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2536 | return r; |
2537 | } | |
2538 | ||
05e343b7 LP |
2539 | int unit_watch_bus_name(Unit *u, const char *name) { |
2540 | assert(u); | |
2541 | assert(name); | |
2542 | ||
2543 | /* Watch a specific name on the bus. We only support one unit | |
2544 | * watching each name for now. */ | |
2545 | ||
ac155bb8 | 2546 | return hashmap_put(u->manager->watch_bus, name, u); |
05e343b7 LP |
2547 | } |
2548 | ||
2549 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2550 | assert(u); | |
2551 | assert(name); | |
2552 | ||
ac155bb8 | 2553 | hashmap_remove_value(u->manager->watch_bus, name, u); |
05e343b7 LP |
2554 | } |
2555 | ||
a16e1123 LP |
2556 | bool unit_can_serialize(Unit *u) { |
2557 | assert(u); | |
2558 | ||
2559 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2560 | } | |
2561 | ||
6b78f9b4 | 2562 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2563 | int r; |
2564 | ||
2565 | assert(u); | |
2566 | assert(f); | |
2567 | assert(fds); | |
2568 | ||
9bdb98c5 LP |
2569 | if (unit_can_serialize(u)) { |
2570 | ExecRuntime *rt; | |
a16e1123 | 2571 | |
9bdb98c5 | 2572 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
2573 | if (r < 0) |
2574 | return r; | |
9bdb98c5 LP |
2575 | |
2576 | rt = unit_get_exec_runtime(u); | |
2577 | if (rt) { | |
2578 | r = exec_runtime_serialize(rt, u, f, fds); | |
2579 | if (r < 0) | |
2580 | return r; | |
2581 | } | |
e0209d83 MS |
2582 | } |
2583 | ||
ac155bb8 MS |
2584 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2585 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2586 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2587 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2588 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
59fccdc5 | 2589 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 2590 | |
ac155bb8 MS |
2591 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2592 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2593 | |
59fccdc5 LP |
2594 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
2595 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
2596 | ||
c2756a68 | 2597 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
5ad096b3 | 2598 | unit_serialize_item_format(u, f, "cpuacct-usage-base", "%" PRIu64, u->cpuacct_usage_base); |
c2756a68 LP |
2599 | |
2600 | if (u->cgroup_path) | |
2601 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
2602 | ||
613b411c LP |
2603 | if (serialize_jobs) { |
2604 | if (u->job) { | |
2605 | fprintf(f, "job\n"); | |
2606 | job_serialize(u->job, f, fds); | |
2607 | } | |
2608 | ||
2609 | if (u->nop_job) { | |
2610 | fprintf(f, "job\n"); | |
2611 | job_serialize(u->nop_job, f, fds); | |
2612 | } | |
2613 | } | |
2614 | ||
a16e1123 LP |
2615 | /* End marker */ |
2616 | fputc('\n', f); | |
2617 | return 0; | |
2618 | } | |
2619 | ||
2620 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2621 | va_list ap; | |
2622 | ||
2623 | assert(u); | |
2624 | assert(f); | |
2625 | assert(key); | |
2626 | assert(format); | |
2627 | ||
2628 | fputs(key, f); | |
2629 | fputc('=', f); | |
2630 | ||
2631 | va_start(ap, format); | |
2632 | vfprintf(f, format, ap); | |
2633 | va_end(ap); | |
2634 | ||
2635 | fputc('\n', f); | |
2636 | } | |
2637 | ||
2638 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2639 | assert(u); | |
2640 | assert(f); | |
2641 | assert(key); | |
2642 | assert(value); | |
2643 | ||
2644 | fprintf(f, "%s=%s\n", key, value); | |
2645 | } | |
2646 | ||
e911de99 LP |
2647 | static int unit_set_cgroup_path(Unit *u, const char *path) { |
2648 | _cleanup_free_ char *p = NULL; | |
2649 | int r; | |
2650 | ||
2651 | assert(u); | |
2652 | ||
2653 | if (path) { | |
2654 | p = strdup(path); | |
2655 | if (!p) | |
2656 | return -ENOMEM; | |
2657 | } else | |
2658 | p = NULL; | |
2659 | ||
2660 | if (streq_ptr(u->cgroup_path, p)) | |
2661 | return 0; | |
2662 | ||
2663 | if (p) { | |
2664 | r = hashmap_put(u->manager->cgroup_unit, p, u); | |
2665 | if (r < 0) | |
2666 | return r; | |
2667 | } | |
2668 | ||
2669 | if (u->cgroup_path) { | |
2670 | log_unit_debug(u->id, "%s: Changing cgroup path from %s to %s.", u->id, u->cgroup_path, strna(p)); | |
2671 | hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
2672 | free(u->cgroup_path); | |
2673 | } | |
2674 | ||
2675 | u->cgroup_path = p; | |
2676 | p = NULL; | |
2677 | ||
2678 | return 0; | |
2679 | } | |
2680 | ||
a16e1123 | 2681 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
28b99ccd | 2682 | ExecRuntime **rt = NULL; |
9bdb98c5 | 2683 | size_t offset; |
a16e1123 LP |
2684 | int r; |
2685 | ||
2686 | assert(u); | |
2687 | assert(f); | |
2688 | assert(fds); | |
2689 | ||
613b411c LP |
2690 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2691 | if (offset > 0) | |
2692 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
2693 | ||
a16e1123 | 2694 | for (;;) { |
20c03b7b | 2695 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2696 | size_t k; |
2697 | ||
2698 | if (!fgets(line, sizeof(line), f)) { | |
2699 | if (feof(f)) | |
2700 | return 0; | |
2701 | return -errno; | |
2702 | } | |
2703 | ||
10f8e83c | 2704 | char_array_0(line); |
a16e1123 LP |
2705 | l = strstrip(line); |
2706 | ||
2707 | /* End marker */ | |
e911de99 | 2708 | if (isempty(l)) |
a16e1123 LP |
2709 | return 0; |
2710 | ||
2711 | k = strcspn(l, "="); | |
2712 | ||
2713 | if (l[k] == '=') { | |
2714 | l[k] = 0; | |
2715 | v = l+k+1; | |
2716 | } else | |
2717 | v = l+k; | |
2718 | ||
cca098b0 | 2719 | if (streq(l, "job")) { |
39a18c60 MS |
2720 | if (v[0] == '\0') { |
2721 | /* new-style serialized job */ | |
9c3349e2 LP |
2722 | Job *j; |
2723 | ||
2724 | j = job_new_raw(u); | |
39a18c60 | 2725 | if (!j) |
e911de99 | 2726 | return log_oom(); |
39a18c60 MS |
2727 | |
2728 | r = job_deserialize(j, f, fds); | |
2729 | if (r < 0) { | |
2730 | job_free(j); | |
2731 | return r; | |
2732 | } | |
cca098b0 | 2733 | |
39a18c60 MS |
2734 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2735 | if (r < 0) { | |
2736 | job_free(j); | |
2737 | return r; | |
2738 | } | |
e0209d83 MS |
2739 | |
2740 | r = job_install_deserialized(j); | |
2741 | if (r < 0) { | |
2742 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2743 | job_free(j); | |
2744 | return r; | |
2745 | } | |
39a18c60 MS |
2746 | } else { |
2747 | /* legacy */ | |
9c3349e2 LP |
2748 | JobType type; |
2749 | ||
2750 | type = job_type_from_string(v); | |
39a18c60 MS |
2751 | if (type < 0) |
2752 | log_debug("Failed to parse job type value %s", v); | |
2753 | else | |
2754 | u->deserialized_job = type; | |
2755 | } | |
cca098b0 | 2756 | continue; |
8aaf019b | 2757 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2758 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2759 | continue; |
2760 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2761 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2762 | continue; |
2763 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2764 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2765 | continue; |
2766 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2767 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2768 | continue; |
2791a8f8 | 2769 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2770 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 2771 | continue; |
59fccdc5 LP |
2772 | } else if (streq(l, "assert-timestamp")) { |
2773 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
2774 | continue; | |
2791a8f8 | 2775 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 2776 | |
e911de99 LP |
2777 | r = parse_boolean(v); |
2778 | if (r < 0) | |
2779 | log_debug("Failed to parse condition result value %s, ignoring.", v); | |
2791a8f8 | 2780 | else |
e911de99 | 2781 | u->condition_result = r; |
efbac6d2 LP |
2782 | |
2783 | continue; | |
c2756a68 | 2784 | |
59fccdc5 | 2785 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 2786 | |
e911de99 LP |
2787 | r = parse_boolean(v); |
2788 | if (r < 0) | |
2789 | log_debug("Failed to parse assert result value %s, ignoring.", v); | |
59fccdc5 | 2790 | else |
e911de99 | 2791 | u->assert_result = r; |
59fccdc5 LP |
2792 | |
2793 | continue; | |
2794 | ||
c2756a68 | 2795 | } else if (streq(l, "transient")) { |
c2756a68 | 2796 | |
e911de99 LP |
2797 | r = parse_boolean(v); |
2798 | if (r < 0) | |
2799 | log_debug("Failed to parse transient bool %s, ignoring.", v); | |
c2756a68 | 2800 | else |
e911de99 | 2801 | u->transient = r; |
c2756a68 LP |
2802 | |
2803 | continue; | |
e911de99 | 2804 | |
5ad096b3 LP |
2805 | } else if (streq(l, "cpuacct-usage-base")) { |
2806 | ||
2807 | r = safe_atou64(v, &u->cpuacct_usage_base); | |
2808 | if (r < 0) | |
e911de99 | 2809 | log_debug("Failed to parse CPU usage %s, ignoring.", v); |
5ad096b3 | 2810 | |
0f908397 | 2811 | continue; |
4e595329 | 2812 | |
e911de99 | 2813 | } else if (streq(l, "cgroup")) { |
72673e86 | 2814 | |
e911de99 LP |
2815 | r = unit_set_cgroup_path(u, v); |
2816 | if (r < 0) | |
2817 | log_debug_errno(r, "Failed to set cgroup path %s, ignoring: %m", v); | |
4e595329 | 2818 | |
c2756a68 | 2819 | continue; |
8aaf019b | 2820 | } |
cca098b0 | 2821 | |
9bdb98c5 LP |
2822 | if (unit_can_serialize(u)) { |
2823 | if (rt) { | |
2824 | r = exec_runtime_deserialize_item(rt, u, l, v, fds); | |
e911de99 LP |
2825 | if (r < 0) { |
2826 | log_unit_warning(u->id, "Failed to deserialize runtime parameter '%s', ignoring.", l); | |
2827 | continue; | |
2828 | } | |
2829 | ||
2830 | /* Returns positive if key was handled by the call */ | |
9bdb98c5 LP |
2831 | if (r > 0) |
2832 | continue; | |
2833 | } | |
2834 | ||
2835 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); | |
613b411c | 2836 | if (r < 0) |
e911de99 | 2837 | log_unit_warning(u->id, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 2838 | } |
a16e1123 LP |
2839 | } |
2840 | } | |
2841 | ||
6e2ef85b LP |
2842 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2843 | Unit *device; | |
68eda4bd | 2844 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
2845 | int r; |
2846 | ||
2847 | assert(u); | |
2848 | ||
2849 | if (!what) | |
2850 | return 0; | |
2851 | ||
2852 | /* Adds in links to the device node that this unit is based on */ | |
2853 | ||
8407a5d0 | 2854 | if (!is_device_path(what)) |
6e2ef85b LP |
2855 | return 0; |
2856 | ||
35eb6b12 LP |
2857 | e = unit_name_from_path(what, ".device"); |
2858 | if (!e) | |
6e2ef85b LP |
2859 | return -ENOMEM; |
2860 | ||
ac155bb8 | 2861 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
2862 | if (r < 0) |
2863 | return r; | |
2864 | ||
5bd4b173 | 2865 | r = unit_add_two_dependencies(u, UNIT_AFTER, u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_BINDS_TO : UNIT_WANTS, device, true); |
faa368e3 | 2866 | if (r < 0) |
6e2ef85b LP |
2867 | return r; |
2868 | ||
faa368e3 LP |
2869 | if (wants) { |
2870 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2871 | if (r < 0) | |
6e2ef85b | 2872 | return r; |
faa368e3 | 2873 | } |
6e2ef85b LP |
2874 | |
2875 | return 0; | |
2876 | } | |
a16e1123 | 2877 | |
be847e82 | 2878 | int unit_coldplug(Unit *u) { |
f78f265f LP |
2879 | Unit *other; |
2880 | Iterator i; | |
cca098b0 LP |
2881 | int r; |
2882 | ||
2883 | assert(u); | |
2884 | ||
f78f265f LP |
2885 | /* Make sure we don't enter a loop, when coldplugging |
2886 | * recursively. */ | |
2887 | if (u->coldplugged) | |
2888 | return 0; | |
2889 | ||
2890 | u->coldplugged = true; | |
2891 | ||
2892 | /* Make sure everything that we might pull in through | |
2893 | * triggering is coldplugged before us */ | |
2894 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERS], i) { | |
2895 | r = unit_coldplug(other); | |
2896 | if (r < 0) | |
cca098b0 | 2897 | return r; |
f78f265f LP |
2898 | } |
2899 | ||
2900 | if (UNIT_VTABLE(u)->coldplug) { | |
2901 | r = UNIT_VTABLE(u)->coldplug(u); | |
2902 | if (r < 0) | |
2903 | return r; | |
2904 | } | |
cca098b0 | 2905 | |
39a18c60 MS |
2906 | if (u->job) { |
2907 | r = job_coldplug(u->job); | |
2908 | if (r < 0) | |
2909 | return r; | |
be847e82 | 2910 | } else if (u->deserialized_job >= 0) { |
39a18c60 | 2911 | /* legacy */ |
be847e82 LP |
2912 | r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL); |
2913 | if (r < 0) | |
2914 | return r; | |
2915 | ||
2916 | u->deserialized_job = _JOB_TYPE_INVALID; | |
2917 | } | |
cca098b0 LP |
2918 | |
2919 | return 0; | |
2920 | } | |
2921 | ||
49b1d377 | 2922 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
bcfce235 | 2923 | DISABLE_WARNING_FORMAT_NONLITERAL; |
127d5fd1 ZJS |
2924 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, |
2925 | status, unit_status_msg_format, unit_description(u)); | |
bcfce235 | 2926 | REENABLE_WARNING; |
49b1d377 MS |
2927 | } |
2928 | ||
45fb0699 | 2929 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
2930 | _cleanup_strv_free_ char **t = NULL; |
2931 | char **path; | |
1b64d026 | 2932 | struct stat st; |
ae7a7182 | 2933 | unsigned loaded_cnt, current_cnt; |
1b64d026 | 2934 | |
45fb0699 LP |
2935 | assert(u); |
2936 | ||
ac155bb8 | 2937 | if (u->fragment_path) { |
5f4b19f4 | 2938 | zero(st); |
ac155bb8 | 2939 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2940 | /* What, cannot access this anymore? */ |
2941 | return true; | |
45fb0699 | 2942 | |
ac155bb8 MS |
2943 | if (u->fragment_mtime > 0 && |
2944 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2945 | return true; |
2946 | } | |
2947 | ||
1b64d026 LP |
2948 | if (u->source_path) { |
2949 | zero(st); | |
2950 | if (stat(u->source_path, &st) < 0) | |
2951 | return true; | |
2952 | ||
2953 | if (u->source_mtime > 0 && | |
2954 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2955 | return true; | |
2956 | } | |
5f4b19f4 | 2957 | |
1a7f1b38 | 2958 | (void) unit_find_dropin_paths(u, &t); |
ae7a7182 OS |
2959 | loaded_cnt = strv_length(t); |
2960 | current_cnt = strv_length(u->dropin_paths); | |
2961 | ||
2962 | if (loaded_cnt == current_cnt) { | |
2963 | if (loaded_cnt == 0) | |
2964 | return false; | |
2965 | ||
2966 | if (strv_overlap(u->dropin_paths, t)) { | |
2967 | STRV_FOREACH(path, u->dropin_paths) { | |
2968 | zero(st); | |
2969 | if (stat(*path, &st) < 0) | |
2970 | return true; | |
2971 | ||
2972 | if (u->dropin_mtime > 0 && | |
2973 | timespec_load(&st.st_mtim) > u->dropin_mtime) | |
2974 | return true; | |
2975 | } | |
2976 | ||
2977 | return false; | |
2978 | } else | |
2979 | return true; | |
2980 | } else | |
2981 | return true; | |
45fb0699 LP |
2982 | } |
2983 | ||
fdf20a31 | 2984 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2985 | assert(u); |
2986 | ||
fdf20a31 MM |
2987 | if (UNIT_VTABLE(u)->reset_failed) |
2988 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2989 | } |
2990 | ||
a7f241db LP |
2991 | Unit *unit_following(Unit *u) { |
2992 | assert(u); | |
2993 | ||
2994 | if (UNIT_VTABLE(u)->following) | |
2995 | return UNIT_VTABLE(u)->following(u); | |
2996 | ||
2997 | return NULL; | |
2998 | } | |
2999 | ||
31afa0a4 | 3000 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3001 | assert(u); |
3002 | ||
31afa0a4 LP |
3003 | /* This call does check the current state of the unit. It's |
3004 | * hence useful to be called from state change calls of the | |
3005 | * unit itself, where the state isn't updated yet. This is | |
3006 | * different from unit_inactive_or_pending() which checks both | |
3007 | * the current state and for a queued job. */ | |
18ffdfda | 3008 | |
31afa0a4 LP |
3009 | return u->job && u->job->type == JOB_STOP; |
3010 | } | |
3011 | ||
3012 | bool unit_inactive_or_pending(Unit *u) { | |
3013 | assert(u); | |
3014 | ||
3015 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3016 | |
d956ac29 LP |
3017 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3018 | return true; | |
3019 | ||
31afa0a4 | 3020 | if (unit_stop_pending(u)) |
18ffdfda LP |
3021 | return true; |
3022 | ||
3023 | return false; | |
3024 | } | |
3025 | ||
31afa0a4 | 3026 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3027 | assert(u); |
3028 | ||
f60c2665 | 3029 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3030 | |
3031 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3032 | return true; | |
3033 | ||
ac155bb8 MS |
3034 | if (u->job && |
3035 | (u->job->type == JOB_START || | |
3036 | u->job->type == JOB_RELOAD_OR_START || | |
3037 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
3038 | return true; |
3039 | ||
3040 | return false; | |
3041 | } | |
3042 | ||
718db961 | 3043 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3044 | assert(u); |
3045 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
3046 | assert(signo > 0); |
3047 | assert(signo < _NSIG); | |
3048 | ||
8a0867d6 | 3049 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3050 | return -EOPNOTSUPP; |
8a0867d6 | 3051 | |
c74f17d9 | 3052 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3053 | } |
3054 | ||
82659fd7 LP |
3055 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
3056 | Set *pid_set; | |
3057 | int r; | |
3058 | ||
d5099efc | 3059 | pid_set = set_new(NULL); |
82659fd7 LP |
3060 | if (!pid_set) |
3061 | return NULL; | |
3062 | ||
3063 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3064 | if (main_pid > 0) { | |
3065 | r = set_put(pid_set, LONG_TO_PTR(main_pid)); | |
3066 | if (r < 0) | |
3067 | goto fail; | |
3068 | } | |
3069 | ||
3070 | if (control_pid > 0) { | |
3071 | r = set_put(pid_set, LONG_TO_PTR(control_pid)); | |
3072 | if (r < 0) | |
3073 | goto fail; | |
3074 | } | |
3075 | ||
3076 | return pid_set; | |
3077 | ||
3078 | fail: | |
3079 | set_free(pid_set); | |
3080 | return NULL; | |
3081 | } | |
3082 | ||
d91c34f2 LP |
3083 | int unit_kill_common( |
3084 | Unit *u, | |
3085 | KillWho who, | |
3086 | int signo, | |
3087 | pid_t main_pid, | |
3088 | pid_t control_pid, | |
718db961 | 3089 | sd_bus_error *error) { |
d91c34f2 | 3090 | |
814cc562 MS |
3091 | int r = 0; |
3092 | ||
3093 | if (who == KILL_MAIN && main_pid <= 0) { | |
3094 | if (main_pid < 0) | |
7358dc02 | 3095 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
814cc562 | 3096 | else |
7358dc02 | 3097 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3098 | } |
3099 | ||
3100 | if (who == KILL_CONTROL && control_pid <= 0) { | |
3101 | if (control_pid < 0) | |
7358dc02 | 3102 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
814cc562 | 3103 | else |
7358dc02 | 3104 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3105 | } |
3106 | ||
3107 | if (who == KILL_CONTROL || who == KILL_ALL) | |
3108 | if (control_pid > 0) | |
3109 | if (kill(control_pid, signo) < 0) | |
3110 | r = -errno; | |
3111 | ||
3112 | if (who == KILL_MAIN || who == KILL_ALL) | |
3113 | if (main_pid > 0) | |
3114 | if (kill(main_pid, signo) < 0) | |
3115 | r = -errno; | |
3116 | ||
4ad49000 | 3117 | if (who == KILL_ALL && u->cgroup_path) { |
814cc562 MS |
3118 | _cleanup_set_free_ Set *pid_set = NULL; |
3119 | int q; | |
3120 | ||
82659fd7 LP |
3121 | /* Exclude the main/control pids from being killed via the cgroup */ |
3122 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3123 | if (!pid_set) |
3124 | return -ENOMEM; | |
3125 | ||
4ad49000 | 3126 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set); |
814cc562 MS |
3127 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
3128 | r = q; | |
3129 | } | |
3130 | ||
3131 | return r; | |
3132 | } | |
3133 | ||
6210e7fc LP |
3134 | int unit_following_set(Unit *u, Set **s) { |
3135 | assert(u); | |
3136 | assert(s); | |
3137 | ||
3138 | if (UNIT_VTABLE(u)->following_set) | |
3139 | return UNIT_VTABLE(u)->following_set(u, s); | |
3140 | ||
3141 | *s = NULL; | |
3142 | return 0; | |
3143 | } | |
3144 | ||
a4375746 LP |
3145 | UnitFileState unit_get_unit_file_state(Unit *u) { |
3146 | assert(u); | |
3147 | ||
ac155bb8 MS |
3148 | if (u->unit_file_state < 0 && u->fragment_path) |
3149 | u->unit_file_state = unit_file_get_state( | |
67445f4e | 3150 | u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
2b6bf07d | 3151 | NULL, basename(u->fragment_path)); |
a4375746 | 3152 | |
ac155bb8 | 3153 | return u->unit_file_state; |
a4375746 LP |
3154 | } |
3155 | ||
d2dc52db LP |
3156 | int unit_get_unit_file_preset(Unit *u) { |
3157 | assert(u); | |
3158 | ||
3159 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3160 | u->unit_file_preset = unit_file_query_preset( | |
3161 | u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, | |
3162 | NULL, basename(u->fragment_path)); | |
3163 | ||
3164 | return u->unit_file_preset; | |
3165 | } | |
3166 | ||
57020a3a LP |
3167 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
3168 | assert(ref); | |
3169 | assert(u); | |
3170 | ||
3171 | if (ref->unit) | |
3172 | unit_ref_unset(ref); | |
3173 | ||
3174 | ref->unit = u; | |
71fda00f | 3175 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
3176 | return u; |
3177 | } | |
3178 | ||
3179 | void unit_ref_unset(UnitRef *ref) { | |
3180 | assert(ref); | |
3181 | ||
3182 | if (!ref->unit) | |
3183 | return; | |
3184 | ||
71fda00f | 3185 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
3186 | ref->unit = NULL; |
3187 | } | |
3188 | ||
598459ce LP |
3189 | int unit_patch_contexts(Unit *u) { |
3190 | CGroupContext *cc; | |
3191 | ExecContext *ec; | |
cba6e062 LP |
3192 | unsigned i; |
3193 | int r; | |
3194 | ||
e06c73cc | 3195 | assert(u); |
e06c73cc | 3196 | |
598459ce LP |
3197 | /* Patch in the manager defaults into the exec and cgroup |
3198 | * contexts, _after_ the rest of the settings have been | |
3199 | * initialized */ | |
085afe36 | 3200 | |
598459ce LP |
3201 | ec = unit_get_exec_context(u); |
3202 | if (ec) { | |
3203 | /* This only copies in the ones that need memory */ | |
3204 | for (i = 0; i < _RLIMIT_MAX; i++) | |
3205 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
3206 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
3207 | if (!ec->rlimit[i]) | |
3208 | return -ENOMEM; | |
3209 | } | |
3210 | ||
3211 | if (u->manager->running_as == SYSTEMD_USER && | |
3212 | !ec->working_directory) { | |
3213 | ||
3214 | r = get_home_dir(&ec->working_directory); | |
3215 | if (r < 0) | |
3216 | return r; | |
4c08c824 LP |
3217 | |
3218 | /* Allow user services to run, even if the | |
3219 | * home directory is missing */ | |
3220 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
3221 | } |
3222 | ||
598459ce LP |
3223 | if (u->manager->running_as == SYSTEMD_USER && |
3224 | (ec->syscall_whitelist || | |
3225 | !set_isempty(ec->syscall_filter) || | |
3226 | !set_isempty(ec->syscall_archs) || | |
3227 | ec->address_families_whitelist || | |
3228 | !set_isempty(ec->address_families))) | |
3229 | ec->no_new_privileges = true; | |
e06c73cc | 3230 | |
598459ce LP |
3231 | if (ec->private_devices) |
3232 | ec->capability_bounding_set_drop |= (uint64_t) 1ULL << (uint64_t) CAP_MKNOD; | |
cba6e062 LP |
3233 | } |
3234 | ||
598459ce LP |
3235 | cc = unit_get_cgroup_context(u); |
3236 | if (cc) { | |
f513e420 | 3237 | |
598459ce LP |
3238 | if (ec && |
3239 | ec->private_devices && | |
3240 | cc->device_policy == CGROUP_AUTO) | |
3241 | cc->device_policy = CGROUP_CLOSED; | |
3242 | } | |
f1660f96 | 3243 | |
cba6e062 | 3244 | return 0; |
e06c73cc LP |
3245 | } |
3246 | ||
3ef63c31 LP |
3247 | ExecContext *unit_get_exec_context(Unit *u) { |
3248 | size_t offset; | |
3249 | assert(u); | |
3250 | ||
598459ce LP |
3251 | if (u->type < 0) |
3252 | return NULL; | |
3253 | ||
3ef63c31 LP |
3254 | offset = UNIT_VTABLE(u)->exec_context_offset; |
3255 | if (offset <= 0) | |
3256 | return NULL; | |
3257 | ||
3258 | return (ExecContext*) ((uint8_t*) u + offset); | |
3259 | } | |
3260 | ||
718db961 LP |
3261 | KillContext *unit_get_kill_context(Unit *u) { |
3262 | size_t offset; | |
3263 | assert(u); | |
3264 | ||
598459ce LP |
3265 | if (u->type < 0) |
3266 | return NULL; | |
3267 | ||
718db961 LP |
3268 | offset = UNIT_VTABLE(u)->kill_context_offset; |
3269 | if (offset <= 0) | |
3270 | return NULL; | |
3271 | ||
3272 | return (KillContext*) ((uint8_t*) u + offset); | |
3273 | } | |
3274 | ||
4ad49000 LP |
3275 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
3276 | size_t offset; | |
3277 | ||
598459ce LP |
3278 | if (u->type < 0) |
3279 | return NULL; | |
3280 | ||
4ad49000 LP |
3281 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
3282 | if (offset <= 0) | |
3283 | return NULL; | |
3284 | ||
3285 | return (CGroupContext*) ((uint8_t*) u + offset); | |
3286 | } | |
3287 | ||
613b411c LP |
3288 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
3289 | size_t offset; | |
3290 | ||
598459ce LP |
3291 | if (u->type < 0) |
3292 | return NULL; | |
3293 | ||
613b411c LP |
3294 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
3295 | if (offset <= 0) | |
3296 | return NULL; | |
3297 | ||
3298 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
3299 | } | |
3300 | ||
29686440 | 3301 | static int unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode, bool transient, char **dir) { |
26d04f86 | 3302 | if (u->manager->running_as == SYSTEMD_USER) { |
29686440 | 3303 | int r; |
26d04f86 | 3304 | |
718880ba SA |
3305 | if (mode == UNIT_PERSISTENT && !transient) |
3306 | r = user_config_home(dir); | |
3307 | else | |
4d5dec23 | 3308 | r = user_runtime_dir(dir); |
718880ba | 3309 | |
26d04f86 LP |
3310 | if (r == 0) |
3311 | return -ENOENT; | |
29686440 ZJS |
3312 | return r; |
3313 | } | |
26d04f86 | 3314 | |
29686440 ZJS |
3315 | if (mode == UNIT_PERSISTENT && !transient) |
3316 | *dir = strdup("/etc/systemd/system"); | |
8e2af478 | 3317 | else |
29686440 ZJS |
3318 | *dir = strdup("/run/systemd/system"); |
3319 | if (!*dir) | |
71645aca LP |
3320 | return -ENOMEM; |
3321 | ||
26d04f86 | 3322 | return 0; |
71645aca LP |
3323 | } |
3324 | ||
29686440 ZJS |
3325 | static int unit_drop_in_file(Unit *u, |
3326 | UnitSetPropertiesMode mode, const char *name, char **p, char **q) { | |
3327 | _cleanup_free_ char *dir = NULL; | |
3328 | int r; | |
3329 | ||
3330 | assert(u); | |
3331 | ||
3332 | r = unit_drop_in_dir(u, mode, u->transient, &dir); | |
3333 | if (r < 0) | |
3334 | return r; | |
3335 | ||
8eea8687 | 3336 | return drop_in_file(dir, u->id, 50, name, p, q); |
29686440 ZJS |
3337 | } |
3338 | ||
8e2af478 | 3339 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
29686440 | 3340 | |
adb76a70 | 3341 | _cleanup_free_ char *dir = NULL, *p = NULL, *q = NULL; |
26d04f86 | 3342 | int r; |
71645aca LP |
3343 | |
3344 | assert(u); | |
3345 | ||
6d235724 | 3346 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3347 | return 0; |
3348 | ||
29686440 | 3349 | r = unit_drop_in_dir(u, mode, u->transient, &dir); |
26d04f86 LP |
3350 | if (r < 0) |
3351 | return r; | |
71645aca | 3352 | |
adb76a70 WC |
3353 | r = write_drop_in(dir, u->id, 50, name, data); |
3354 | if (r < 0) | |
3355 | return r; | |
3356 | ||
3357 | r = drop_in_file(dir, u->id, 50, name, &p, &q); | |
3358 | if (r < 0) | |
3359 | return r; | |
3360 | ||
3361 | r = strv_extend(&u->dropin_paths, q); | |
3362 | if (r < 0) | |
3363 | return r; | |
3364 | ||
3365 | strv_sort(u->dropin_paths); | |
3366 | strv_uniq(u->dropin_paths); | |
3367 | ||
3368 | u->dropin_mtime = now(CLOCK_REALTIME); | |
3369 | ||
3370 | return 0; | |
26d04f86 | 3371 | } |
71645aca | 3372 | |
b9ec9359 LP |
3373 | int unit_write_drop_in_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(u, mode, name, p); | |
3393 | } | |
3394 | ||
3395 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
b42defe3 LP |
3396 | _cleanup_free_ char *ndata = NULL; |
3397 | ||
3398 | assert(u); | |
3399 | assert(name); | |
3400 | assert(data); | |
3401 | ||
3402 | if (!UNIT_VTABLE(u)->private_section) | |
3403 | return -EINVAL; | |
3404 | ||
6d235724 | 3405 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3406 | return 0; |
3407 | ||
b42defe3 LP |
3408 | ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL); |
3409 | if (!ndata) | |
3410 | return -ENOMEM; | |
3411 | ||
3412 | return unit_write_drop_in(u, mode, name, ndata); | |
3413 | } | |
3414 | ||
b9ec9359 LP |
3415 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3416 | _cleanup_free_ char *p = NULL; | |
3417 | va_list ap; | |
3418 | int r; | |
3419 | ||
3420 | assert(u); | |
3421 | assert(name); | |
3422 | assert(format); | |
3423 | ||
6d235724 | 3424 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3425 | return 0; |
3426 | ||
3427 | va_start(ap, format); | |
3428 | r = vasprintf(&p, format, ap); | |
3429 | va_end(ap); | |
3430 | ||
3431 | if (r < 0) | |
3432 | return -ENOMEM; | |
3433 | ||
3434 | return unit_write_drop_in_private(u, mode, name, p); | |
3435 | } | |
3436 | ||
8e2af478 | 3437 | int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) { |
26d04f86 LP |
3438 | _cleanup_free_ char *p = NULL, *q = NULL; |
3439 | int r; | |
71645aca | 3440 | |
26d04f86 | 3441 | assert(u); |
71645aca | 3442 | |
6d235724 | 3443 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3444 | return 0; |
3445 | ||
29686440 | 3446 | r = unit_drop_in_file(u, mode, name, &p, &q); |
6891529f ZJS |
3447 | if (r < 0) |
3448 | return r; | |
3449 | ||
71645aca | 3450 | if (unlink(q) < 0) |
241da328 | 3451 | r = errno == ENOENT ? 0 : -errno; |
26d04f86 | 3452 | else |
241da328 | 3453 | r = 1; |
71645aca LP |
3454 | |
3455 | rmdir(p); | |
26d04f86 | 3456 | return r; |
71645aca LP |
3457 | } |
3458 | ||
c2756a68 LP |
3459 | int unit_make_transient(Unit *u) { |
3460 | int r; | |
3461 | ||
3462 | assert(u); | |
3463 | ||
3464 | u->load_state = UNIT_STUB; | |
3465 | u->load_error = 0; | |
3466 | u->transient = true; | |
3467 | ||
3468 | free(u->fragment_path); | |
3469 | u->fragment_path = NULL; | |
3470 | ||
3471 | if (u->manager->running_as == SYSTEMD_USER) { | |
3472 | _cleanup_free_ char *c = NULL; | |
3473 | ||
4d5dec23 | 3474 | r = user_runtime_dir(&c); |
c2756a68 LP |
3475 | if (r < 0) |
3476 | return r; | |
3477 | if (r == 0) | |
3478 | return -ENOENT; | |
3479 | ||
3480 | u->fragment_path = strjoin(c, "/", u->id, NULL); | |
3481 | if (!u->fragment_path) | |
3482 | return -ENOMEM; | |
3483 | ||
3484 | mkdir_p(c, 0755); | |
3485 | } else { | |
3486 | u->fragment_path = strappend("/run/systemd/system/", u->id); | |
3487 | if (!u->fragment_path) | |
3488 | return -ENOMEM; | |
3489 | ||
3490 | mkdir_p("/run/systemd/system", 0755); | |
3491 | } | |
3492 | ||
3493 | return write_string_file_atomic_label(u->fragment_path, "# Transient stub"); | |
3494 | } | |
3495 | ||
cd2086fe LP |
3496 | int unit_kill_context( |
3497 | Unit *u, | |
3498 | KillContext *c, | |
db2cb23b | 3499 | KillOperation k, |
cd2086fe LP |
3500 | pid_t main_pid, |
3501 | pid_t control_pid, | |
3502 | bool main_pid_alien) { | |
3503 | ||
bc6aed7b | 3504 | int sig, wait_for_exit = false, r; |
cd2086fe LP |
3505 | |
3506 | assert(u); | |
3507 | assert(c); | |
3508 | ||
3509 | if (c->kill_mode == KILL_NONE) | |
3510 | return 0; | |
3511 | ||
db2cb23b UTL |
3512 | switch (k) { |
3513 | case KILL_KILL: | |
3514 | sig = SIGKILL; | |
3515 | break; | |
3516 | case KILL_ABORT: | |
3517 | sig = SIGABRT; | |
3518 | break; | |
3519 | case KILL_TERMINATE: | |
3520 | sig = c->kill_signal; | |
3521 | break; | |
3522 | default: | |
3523 | assert_not_reached("KillOperation unknown"); | |
3524 | } | |
cd2086fe LP |
3525 | |
3526 | if (main_pid > 0) { | |
3527 | r = kill_and_sigcont(main_pid, sig); | |
3528 | ||
3529 | if (r < 0 && r != -ESRCH) { | |
3530 | _cleanup_free_ char *comm = NULL; | |
3531 | get_process_comm(main_pid, &comm); | |
3532 | ||
31938a85 | 3533 | log_unit_warning_errno(u->id, r, "Failed to kill main process " PID_FMT " (%s): %m", main_pid, strna(comm)); |
82659fd7 | 3534 | } else { |
bc6aed7b LP |
3535 | if (!main_pid_alien) |
3536 | wait_for_exit = true; | |
82659fd7 | 3537 | |
db2cb23b | 3538 | if (c->send_sighup && k != KILL_KILL) |
82659fd7 LP |
3539 | kill(main_pid, SIGHUP); |
3540 | } | |
cd2086fe LP |
3541 | } |
3542 | ||
3543 | if (control_pid > 0) { | |
3544 | r = kill_and_sigcont(control_pid, sig); | |
3545 | ||
3546 | if (r < 0 && r != -ESRCH) { | |
3547 | _cleanup_free_ char *comm = NULL; | |
3548 | get_process_comm(control_pid, &comm); | |
3549 | ||
31938a85 | 3550 | log_unit_warning_errno(u->id, r, "Failed to kill control process " PID_FMT " (%s): %m", control_pid, strna(comm)); |
82659fd7 | 3551 | } else { |
cd2086fe | 3552 | wait_for_exit = true; |
82659fd7 | 3553 | |
db2cb23b | 3554 | if (c->send_sighup && k != KILL_KILL) |
82659fd7 LP |
3555 | kill(control_pid, SIGHUP); |
3556 | } | |
cd2086fe LP |
3557 | } |
3558 | ||
db2cb23b | 3559 | if ((c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL)) && u->cgroup_path) { |
cd2086fe LP |
3560 | _cleanup_set_free_ Set *pid_set = NULL; |
3561 | ||
82659fd7 LP |
3562 | /* Exclude the main/control pids from being killed via the cgroup */ |
3563 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
3564 | if (!pid_set) |
3565 | return -ENOMEM; | |
3566 | ||
4ad49000 | 3567 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, true, false, pid_set); |
cd2086fe LP |
3568 | if (r < 0) { |
3569 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
31938a85 | 3570 | log_unit_warning_errno(u->id, r, "Failed to kill control group: %m"); |
82659fd7 | 3571 | } else if (r > 0) { |
bc6aed7b | 3572 | |
743970d2 LP |
3573 | /* FIXME: For now, we will not wait for the |
3574 | * cgroup members to die, simply because | |
3575 | * cgroup notification is unreliable. It | |
3576 | * doesn't work at all in containers, and | |
3577 | * outside of containers it can be confused | |
3578 | * easily by leaving directories in the | |
3579 | * cgroup. */ | |
3580 | ||
3581 | /* wait_for_exit = true; */ | |
58ea275a | 3582 | |
db2cb23b | 3583 | if (c->send_sighup && k != KILL_KILL) { |
82659fd7 LP |
3584 | set_free(pid_set); |
3585 | ||
3586 | pid_set = unit_pid_set(main_pid, control_pid); | |
3587 | if (!pid_set) | |
3588 | return -ENOMEM; | |
3589 | ||
8190da36 | 3590 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, false, true, false, pid_set); |
82659fd7 LP |
3591 | } |
3592 | } | |
cd2086fe LP |
3593 | } |
3594 | ||
3595 | return wait_for_exit; | |
3596 | } | |
3597 | ||
a57f7e2c LP |
3598 | int unit_require_mounts_for(Unit *u, const char *path) { |
3599 | char prefix[strlen(path) + 1], *p; | |
3600 | int r; | |
3601 | ||
3602 | assert(u); | |
3603 | assert(path); | |
3604 | ||
3605 | /* Registers a unit for requiring a certain path and all its | |
3606 | * prefixes. We keep a simple array of these paths in the | |
3607 | * unit, since its usually short. However, we build a prefix | |
3608 | * table for all possible prefixes so that new appearing mount | |
3609 | * units can easily determine which units to make themselves a | |
3610 | * dependency of. */ | |
3611 | ||
70b64bd3 ZJS |
3612 | if (!path_is_absolute(path)) |
3613 | return -EINVAL; | |
3614 | ||
a57f7e2c LP |
3615 | p = strdup(path); |
3616 | if (!p) | |
3617 | return -ENOMEM; | |
3618 | ||
3619 | path_kill_slashes(p); | |
3620 | ||
a57f7e2c LP |
3621 | if (!path_is_safe(p)) { |
3622 | free(p); | |
3623 | return -EPERM; | |
3624 | } | |
3625 | ||
3626 | if (strv_contains(u->requires_mounts_for, p)) { | |
3627 | free(p); | |
3628 | return 0; | |
3629 | } | |
3630 | ||
6e18964d ZJS |
3631 | r = strv_consume(&u->requires_mounts_for, p); |
3632 | if (r < 0) | |
a57f7e2c | 3633 | return r; |
a57f7e2c LP |
3634 | |
3635 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
3636 | Set *x; | |
3637 | ||
3638 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
3639 | if (!x) { | |
3640 | char *q; | |
3641 | ||
3642 | if (!u->manager->units_requiring_mounts_for) { | |
d5099efc | 3643 | u->manager->units_requiring_mounts_for = hashmap_new(&string_hash_ops); |
a57f7e2c LP |
3644 | if (!u->manager->units_requiring_mounts_for) |
3645 | return -ENOMEM; | |
3646 | } | |
3647 | ||
3648 | q = strdup(prefix); | |
3649 | if (!q) | |
3650 | return -ENOMEM; | |
3651 | ||
d5099efc | 3652 | x = set_new(NULL); |
a57f7e2c LP |
3653 | if (!x) { |
3654 | free(q); | |
3655 | return -ENOMEM; | |
3656 | } | |
3657 | ||
3658 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
3659 | if (r < 0) { | |
3660 | free(q); | |
3661 | set_free(x); | |
3662 | return r; | |
3663 | } | |
3664 | } | |
3665 | ||
3666 | r = set_put(x, u); | |
3667 | if (r < 0) | |
3668 | return r; | |
3669 | } | |
3670 | ||
3671 | return 0; | |
3672 | } | |
3673 | ||
613b411c LP |
3674 | int unit_setup_exec_runtime(Unit *u) { |
3675 | ExecRuntime **rt; | |
3676 | size_t offset; | |
3677 | Iterator i; | |
3678 | Unit *other; | |
3679 | ||
3680 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3681 | assert(offset > 0); | |
3682 | ||
06b643e7 | 3683 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
3684 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
3685 | if (*rt) | |
3686 | return 0; | |
3687 | ||
3688 | /* Try to get it from somebody else */ | |
3689 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
3690 | ||
3691 | *rt = unit_get_exec_runtime(other); | |
3692 | if (*rt) { | |
3693 | exec_runtime_ref(*rt); | |
3694 | return 0; | |
3695 | } | |
3696 | } | |
3697 | ||
3698 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
3699 | } | |
3700 | ||
94f04347 LP |
3701 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
3702 | [UNIT_ACTIVE] = "active", | |
032ff4af | 3703 | [UNIT_RELOADING] = "reloading", |
94f04347 | 3704 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 3705 | [UNIT_FAILED] = "failed", |
94f04347 LP |
3706 | [UNIT_ACTIVATING] = "activating", |
3707 | [UNIT_DEACTIVATING] = "deactivating" | |
3708 | }; | |
3709 | ||
3710 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); |