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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 | ||
f2341e0a | 68 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 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 | ||
7410616c | 146 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 147 | |
ac155bb8 | 148 | if (!u->instance) |
9e2f7c11 | 149 | return -EINVAL; |
87f0e418 | 150 | |
7410616c LP |
151 | r = unit_name_replace_instance(text, u->instance, &s); |
152 | if (r < 0) | |
153 | return r; | |
154 | } else { | |
9e2f7c11 | 155 | s = strdup(text); |
7410616c LP |
156 | if (!s) |
157 | return -ENOMEM; | |
158 | } | |
87f0e418 | 159 | |
7410616c LP |
160 | if (set_contains(u->names, s)) |
161 | return 0; | |
162 | if (hashmap_contains(u->manager->units, s)) | |
163 | return -EEXIST; | |
164 | ||
165 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 166 | return -EINVAL; |
e537352b | 167 | |
7410616c LP |
168 | t = unit_name_to_type(s); |
169 | if (t < 0) | |
170 | return -EINVAL; | |
87f0e418 | 171 | |
598459ce LP |
172 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
173 | return -EINVAL; | |
87f0e418 | 174 | |
e48614c4 ZJS |
175 | r = unit_name_to_instance(s, &i); |
176 | if (r < 0) | |
598459ce | 177 | return r; |
87f0e418 | 178 | |
598459ce LP |
179 | if (i && unit_vtable[t]->no_instances) |
180 | return -EINVAL; | |
9e2f7c11 | 181 | |
276c3e78 | 182 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
183 | * but not both. Note that we do allow names with different |
184 | * instance names however! */ | |
598459ce LP |
185 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
186 | return -EINVAL; | |
9e2f7c11 | 187 | |
7410616c | 188 | if (unit_vtable[t]->no_alias && !set_isempty(u->names)) |
598459ce | 189 | return -EEXIST; |
9e2f7c11 | 190 | |
598459ce LP |
191 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
192 | return -E2BIG; | |
4f0f902f | 193 | |
e48614c4 | 194 | r = set_put(u->names, s); |
7410616c | 195 | if (r < 0) |
598459ce | 196 | return r; |
7410616c | 197 | assert(r > 0); |
87f0e418 | 198 | |
e48614c4 ZJS |
199 | r = hashmap_put(u->manager->units, s, u); |
200 | if (r < 0) { | |
7410616c | 201 | (void) set_remove(u->names, s); |
598459ce | 202 | return r; |
87f0e418 LP |
203 | } |
204 | ||
ac155bb8 | 205 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
206 | u->type = t; |
207 | u->id = s; | |
208 | u->instance = i; | |
9e2f7c11 | 209 | |
71fda00f | 210 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 211 | |
598459ce | 212 | unit_init(u); |
87f0e418 | 213 | |
598459ce LP |
214 | i = NULL; |
215 | } | |
9e2f7c11 | 216 | |
598459ce | 217 | s = NULL; |
9e2f7c11 | 218 | |
598459ce LP |
219 | unit_add_to_dbus_queue(u); |
220 | return 0; | |
87f0e418 LP |
221 | } |
222 | ||
0ae97ec1 | 223 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 224 | _cleanup_free_ char *t = NULL; |
598459ce | 225 | char *s, *i; |
276c3e78 | 226 | int r; |
0ae97ec1 LP |
227 | |
228 | assert(u); | |
229 | assert(name); | |
230 | ||
7410616c | 231 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 232 | |
ac155bb8 | 233 | if (!u->instance) |
9e2f7c11 LP |
234 | return -EINVAL; |
235 | ||
7410616c LP |
236 | r = unit_name_replace_instance(name, u->instance, &t); |
237 | if (r < 0) | |
238 | return r; | |
9e2f7c11 LP |
239 | |
240 | name = t; | |
241 | } | |
242 | ||
0ae97ec1 | 243 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 244 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 245 | if (!s) |
0ae97ec1 LP |
246 | return -ENOENT; |
247 | ||
7410616c | 248 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
249 | r = unit_name_to_instance(s, &i); |
250 | if (r < 0) | |
276c3e78 LP |
251 | return r; |
252 | ||
ac155bb8 | 253 | u->id = s; |
276c3e78 | 254 | |
ac155bb8 MS |
255 | free(u->instance); |
256 | u->instance = i; | |
276c3e78 | 257 | |
c1e1601e | 258 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 259 | |
0ae97ec1 LP |
260 | return 0; |
261 | } | |
262 | ||
f50e0a01 LP |
263 | int unit_set_description(Unit *u, const char *description) { |
264 | char *s; | |
265 | ||
266 | assert(u); | |
267 | ||
8aec412f LP |
268 | if (isempty(description)) |
269 | s = NULL; | |
270 | else { | |
271 | s = strdup(description); | |
272 | if (!s) | |
273 | return -ENOMEM; | |
274 | } | |
f50e0a01 | 275 | |
ac155bb8 MS |
276 | free(u->description); |
277 | u->description = s; | |
c1e1601e LP |
278 | |
279 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
280 | return 0; |
281 | } | |
282 | ||
701cc384 | 283 | bool unit_check_gc(Unit *u) { |
a354329f | 284 | UnitActiveState state; |
701cc384 LP |
285 | assert(u); |
286 | ||
a354329f | 287 | if (u->job) |
701cc384 LP |
288 | return true; |
289 | ||
a354329f | 290 | if (u->nop_job) |
6c073082 LP |
291 | return true; |
292 | ||
a354329f LP |
293 | state = unit_active_state(u); |
294 | ||
295 | /* If the unit is inactive and failed and no job is queued for | |
296 | * it, then release its runtime resources */ | |
297 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && | |
298 | UNIT_VTABLE(u)->release_resources) | |
299 | UNIT_VTABLE(u)->release_resources(u); | |
300 | ||
301 | /* But we keep the unit object around for longer when it is | |
302 | * referenced or configured to not be gc'ed */ | |
303 | if (state != UNIT_INACTIVE) | |
701cc384 LP |
304 | return true; |
305 | ||
a354329f | 306 | if (UNIT_VTABLE(u)->no_gc) |
e0209d83 MS |
307 | return true; |
308 | ||
a354329f | 309 | if (u->no_gc) |
701cc384 LP |
310 | return true; |
311 | ||
9d576438 LP |
312 | if (u->refs) |
313 | return true; | |
314 | ||
701cc384 LP |
315 | if (UNIT_VTABLE(u)->check_gc) |
316 | if (UNIT_VTABLE(u)->check_gc(u)) | |
317 | return true; | |
318 | ||
319 | return false; | |
320 | } | |
321 | ||
87f0e418 LP |
322 | void unit_add_to_load_queue(Unit *u) { |
323 | assert(u); | |
ac155bb8 | 324 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 325 | |
ac155bb8 | 326 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
327 | return; |
328 | ||
71fda00f | 329 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 330 | u->in_load_queue = true; |
87f0e418 LP |
331 | } |
332 | ||
23a177ef LP |
333 | void unit_add_to_cleanup_queue(Unit *u) { |
334 | assert(u); | |
335 | ||
ac155bb8 | 336 | if (u->in_cleanup_queue) |
23a177ef LP |
337 | return; |
338 | ||
71fda00f | 339 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 340 | u->in_cleanup_queue = true; |
23a177ef LP |
341 | } |
342 | ||
701cc384 LP |
343 | void unit_add_to_gc_queue(Unit *u) { |
344 | assert(u); | |
345 | ||
ac155bb8 | 346 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
347 | return; |
348 | ||
349 | if (unit_check_gc(u)) | |
350 | return; | |
351 | ||
71fda00f | 352 | LIST_PREPEND(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 353 | u->in_gc_queue = true; |
701cc384 | 354 | |
ac155bb8 | 355 | u->manager->n_in_gc_queue ++; |
701cc384 LP |
356 | } |
357 | ||
c1e1601e LP |
358 | void unit_add_to_dbus_queue(Unit *u) { |
359 | assert(u); | |
ac155bb8 | 360 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 361 | |
ac155bb8 | 362 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
363 | return; |
364 | ||
a567261a | 365 | /* Shortcut things if nobody cares */ |
8f8f05a9 LP |
366 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
367 | set_isempty(u->manager->private_buses)) { | |
ac155bb8 | 368 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
369 | return; |
370 | } | |
371 | ||
71fda00f | 372 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 373 | u->in_dbus_queue = true; |
c1e1601e LP |
374 | } |
375 | ||
87f0e418 LP |
376 | static void bidi_set_free(Unit *u, Set *s) { |
377 | Iterator i; | |
378 | Unit *other; | |
379 | ||
380 | assert(u); | |
381 | ||
382 | /* Frees the set and makes sure we are dropped from the | |
383 | * inverse pointers */ | |
384 | ||
385 | SET_FOREACH(other, s, i) { | |
386 | UnitDependency d; | |
387 | ||
388 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 389 | set_remove(other->dependencies[d], u); |
701cc384 LP |
390 | |
391 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
392 | } |
393 | ||
394 | set_free(s); | |
395 | } | |
396 | ||
c2756a68 LP |
397 | static void unit_remove_transient(Unit *u) { |
398 | char **i; | |
399 | ||
400 | assert(u); | |
401 | ||
402 | if (!u->transient) | |
403 | return; | |
404 | ||
405 | if (u->fragment_path) | |
406 | unlink(u->fragment_path); | |
407 | ||
408 | STRV_FOREACH(i, u->dropin_paths) { | |
409 | _cleanup_free_ char *p = NULL; | |
410 | int r; | |
411 | ||
412 | unlink(*i); | |
413 | ||
414 | r = path_get_parent(*i, &p); | |
415 | if (r >= 0) | |
416 | rmdir(p); | |
417 | } | |
418 | } | |
419 | ||
a57f7e2c LP |
420 | static void unit_free_requires_mounts_for(Unit *u) { |
421 | char **j; | |
422 | ||
423 | STRV_FOREACH(j, u->requires_mounts_for) { | |
424 | char s[strlen(*j) + 1]; | |
425 | ||
426 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
427 | char *y; | |
428 | Set *x; | |
429 | ||
430 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
431 | if (!x) | |
432 | continue; | |
433 | ||
434 | set_remove(x, u); | |
435 | ||
436 | if (set_isempty(x)) { | |
437 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
438 | free(y); | |
439 | set_free(x); | |
440 | } | |
441 | } | |
442 | } | |
443 | ||
444 | strv_free(u->requires_mounts_for); | |
445 | u->requires_mounts_for = NULL; | |
446 | } | |
447 | ||
598459ce LP |
448 | static void unit_done(Unit *u) { |
449 | ExecContext *ec; | |
450 | CGroupContext *cc; | |
451 | ||
452 | assert(u); | |
453 | ||
454 | if (u->type < 0) | |
455 | return; | |
456 | ||
457 | if (UNIT_VTABLE(u)->done) | |
458 | UNIT_VTABLE(u)->done(u); | |
459 | ||
460 | ec = unit_get_exec_context(u); | |
461 | if (ec) | |
462 | exec_context_done(ec); | |
463 | ||
464 | cc = unit_get_cgroup_context(u); | |
465 | if (cc) | |
466 | cgroup_context_done(cc); | |
467 | } | |
468 | ||
87f0e418 LP |
469 | void unit_free(Unit *u) { |
470 | UnitDependency d; | |
471 | Iterator i; | |
472 | char *t; | |
473 | ||
474 | assert(u); | |
475 | ||
c2756a68 LP |
476 | if (u->manager->n_reloading <= 0) |
477 | unit_remove_transient(u); | |
478 | ||
c1e1601e LP |
479 | bus_unit_send_removed_signal(u); |
480 | ||
598459ce | 481 | unit_done(u); |
a013b84b | 482 | |
a57f7e2c LP |
483 | unit_free_requires_mounts_for(u); |
484 | ||
ac155bb8 MS |
485 | SET_FOREACH(t, u->names, i) |
486 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 487 | |
97e7d748 MS |
488 | if (u->job) { |
489 | Job *j = u->job; | |
490 | job_uninstall(j); | |
491 | job_free(j); | |
492 | } | |
964e0949 | 493 | |
e0209d83 MS |
494 | if (u->nop_job) { |
495 | Job *j = u->nop_job; | |
496 | job_uninstall(j); | |
497 | job_free(j); | |
498 | } | |
499 | ||
964e0949 | 500 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 501 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 502 | |
ac155bb8 | 503 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 504 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 505 | |
ac155bb8 | 506 | if (u->in_load_queue) |
71fda00f | 507 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 508 | |
ac155bb8 | 509 | if (u->in_dbus_queue) |
71fda00f | 510 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 511 | |
ac155bb8 | 512 | if (u->in_cleanup_queue) |
71fda00f | 513 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 514 | |
ac155bb8 | 515 | if (u->in_gc_queue) { |
71fda00f | 516 | LIST_REMOVE(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 517 | u->manager->n_in_gc_queue--; |
701cc384 LP |
518 | } |
519 | ||
4ad49000 | 520 | if (u->in_cgroup_queue) |
71fda00f | 521 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
87f0e418 | 522 | |
72673e86 LP |
523 | if (u->cgroup_path) { |
524 | hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
525 | free(u->cgroup_path); | |
526 | } | |
527 | ||
03455c28 | 528 | manager_update_failed_units(u->manager, u, false); |
db785129 | 529 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 530 | |
ac155bb8 | 531 | free(u->description); |
49dbfa7b | 532 | strv_free(u->documentation); |
ac155bb8 | 533 | free(u->fragment_path); |
1b64d026 | 534 | free(u->source_path); |
ae7a7182 | 535 | strv_free(u->dropin_paths); |
ac155bb8 | 536 | free(u->instance); |
87f0e418 | 537 | |
f189ab18 LP |
538 | free(u->job_timeout_reboot_arg); |
539 | ||
ac155bb8 | 540 | set_free_free(u->names); |
87f0e418 | 541 | |
a911bb9a LP |
542 | unit_unwatch_all_pids(u); |
543 | ||
ac155bb8 | 544 | condition_free_list(u->conditions); |
59fccdc5 | 545 | condition_free_list(u->asserts); |
52661efd | 546 | |
702a2d8f LP |
547 | unit_ref_unset(&u->slice); |
548 | ||
ac155bb8 MS |
549 | while (u->refs) |
550 | unit_ref_unset(u->refs); | |
57020a3a | 551 | |
87f0e418 LP |
552 | free(u); |
553 | } | |
554 | ||
555 | UnitActiveState unit_active_state(Unit *u) { | |
556 | assert(u); | |
557 | ||
ac155bb8 | 558 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
559 | return unit_active_state(unit_follow_merge(u)); |
560 | ||
561 | /* After a reload it might happen that a unit is not correctly | |
562 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 563 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
564 | |
565 | return UNIT_VTABLE(u)->active_state(u); | |
566 | } | |
567 | ||
10a94420 LP |
568 | const char* unit_sub_state_to_string(Unit *u) { |
569 | assert(u); | |
570 | ||
571 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
572 | } | |
573 | ||
7c0b05e5 MS |
574 | static int complete_move(Set **s, Set **other) { |
575 | int r; | |
576 | ||
23a177ef LP |
577 | assert(s); |
578 | assert(other); | |
87f0e418 | 579 | |
23a177ef | 580 | if (!*other) |
7c0b05e5 | 581 | return 0; |
87f0e418 | 582 | |
7c0b05e5 MS |
583 | if (*s) { |
584 | r = set_move(*s, *other); | |
585 | if (r < 0) | |
586 | return r; | |
587 | } else { | |
23a177ef LP |
588 | *s = *other; |
589 | *other = NULL; | |
590 | } | |
7c0b05e5 MS |
591 | |
592 | return 0; | |
23a177ef | 593 | } |
87f0e418 | 594 | |
7c0b05e5 | 595 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
596 | char *t; |
597 | Iterator i; | |
7c0b05e5 | 598 | int r; |
87f0e418 | 599 | |
23a177ef LP |
600 | assert(u); |
601 | assert(other); | |
602 | ||
7c0b05e5 MS |
603 | r = complete_move(&u->names, &other->names); |
604 | if (r < 0) | |
605 | return r; | |
23a177ef | 606 | |
ac155bb8 MS |
607 | set_free_free(other->names); |
608 | other->names = NULL; | |
609 | other->id = NULL; | |
23a177ef | 610 | |
ac155bb8 MS |
611 | SET_FOREACH(t, u->names, i) |
612 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
613 | |
614 | return 0; | |
87f0e418 LP |
615 | } |
616 | ||
09a65f92 MS |
617 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
618 | unsigned n_reserve; | |
619 | ||
620 | assert(u); | |
621 | assert(other); | |
622 | assert(d < _UNIT_DEPENDENCY_MAX); | |
623 | ||
624 | /* | |
625 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 626 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
627 | * as a whole to u by complete_move(). |
628 | */ | |
629 | if (!u->dependencies[d]) | |
630 | return 0; | |
631 | ||
632 | /* merge_dependencies() will skip a u-on-u dependency */ | |
633 | n_reserve = set_size(other->dependencies[d]) - !!set_get(other->dependencies[d], u); | |
634 | ||
635 | return set_reserve(u->dependencies[d], n_reserve); | |
636 | } | |
637 | ||
d1fab3fe | 638 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
639 | Iterator i; |
640 | Unit *back; | |
87f0e418 | 641 | int r; |
23a177ef LP |
642 | |
643 | assert(u); | |
644 | assert(other); | |
645 | assert(d < _UNIT_DEPENDENCY_MAX); | |
646 | ||
83a95334 | 647 | /* Fix backwards pointers */ |
ac155bb8 | 648 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
649 | UnitDependency k; |
650 | ||
e48614c4 | 651 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff ZJS |
652 | /* Do not add dependencies between u and itself */ |
653 | if (back == u) { | |
d1fab3fe | 654 | if (set_remove(back->dependencies[k], other)) |
f2341e0a | 655 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff ZJS |
656 | } else { |
657 | r = set_remove_and_put(back->dependencies[k], other, u); | |
658 | if (r == -EEXIST) | |
659 | set_remove(back->dependencies[k], other); | |
660 | else | |
661 | assert(r >= 0 || r == -ENOENT); | |
662 | } | |
e48614c4 | 663 | } |
23a177ef LP |
664 | } |
665 | ||
e66047ff | 666 | /* Also do not move dependencies on u to itself */ |
d1fab3fe ZJS |
667 | back = set_remove(other->dependencies[d], u); |
668 | if (back) | |
f2341e0a | 669 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 670 | |
7c0b05e5 MS |
671 | /* The move cannot fail. The caller must have performed a reservation. */ |
672 | assert_se(complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); | |
23a177ef | 673 | |
ac155bb8 MS |
674 | set_free(other->dependencies[d]); |
675 | other->dependencies[d] = NULL; | |
23a177ef LP |
676 | } |
677 | ||
678 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 679 | UnitDependency d; |
d1fab3fe | 680 | const char *other_id = NULL; |
09a65f92 | 681 | int r; |
87f0e418 LP |
682 | |
683 | assert(u); | |
684 | assert(other); | |
ac155bb8 MS |
685 | assert(u->manager == other->manager); |
686 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 687 | |
cc916967 LP |
688 | other = unit_follow_merge(other); |
689 | ||
23a177ef LP |
690 | if (other == u) |
691 | return 0; | |
692 | ||
ac155bb8 | 693 | if (u->type != other->type) |
9e2f7c11 LP |
694 | return -EINVAL; |
695 | ||
ac155bb8 | 696 | if (!u->instance != !other->instance) |
87f0e418 LP |
697 | return -EINVAL; |
698 | ||
ac155bb8 | 699 | if (other->load_state != UNIT_STUB && |
c2756a68 | 700 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 701 | return -EEXIST; |
87f0e418 | 702 | |
ac155bb8 | 703 | if (other->job) |
819e213f LP |
704 | return -EEXIST; |
705 | ||
e0209d83 MS |
706 | if (other->nop_job) |
707 | return -EEXIST; | |
708 | ||
fdf20a31 | 709 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
710 | return -EEXIST; |
711 | ||
d1fab3fe ZJS |
712 | if (other->id) |
713 | other_id = strdupa(other->id); | |
714 | ||
09a65f92 MS |
715 | /* Make reservations to ensure merge_dependencies() won't fail */ |
716 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
717 | r = reserve_dependencies(u, other, d); | |
718 | /* | |
719 | * We don't rollback reservations if we fail. We don't have | |
720 | * a way to undo reservations. A reservation is not a leak. | |
721 | */ | |
722 | if (r < 0) | |
723 | return r; | |
724 | } | |
725 | ||
87f0e418 | 726 | /* Merge names */ |
7c0b05e5 MS |
727 | r = merge_names(u, other); |
728 | if (r < 0) | |
729 | return r; | |
87f0e418 | 730 | |
57020a3a | 731 | /* Redirect all references */ |
ac155bb8 MS |
732 | while (other->refs) |
733 | unit_ref_set(other->refs, u); | |
57020a3a | 734 | |
87f0e418 LP |
735 | /* Merge dependencies */ |
736 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 737 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 738 | |
ac155bb8 MS |
739 | other->load_state = UNIT_MERGED; |
740 | other->merged_into = u; | |
23a177ef | 741 | |
3616a49c LP |
742 | /* If there is still some data attached to the other node, we |
743 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 744 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
745 | if (UNIT_VTABLE(other)->done) |
746 | UNIT_VTABLE(other)->done(other); | |
747 | ||
748 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
749 | unit_add_to_cleanup_queue(other); |
750 | ||
751 | return 0; | |
752 | } | |
753 | ||
754 | int unit_merge_by_name(Unit *u, const char *name) { | |
755 | Unit *other; | |
9e2f7c11 | 756 | int r; |
68eda4bd | 757 | _cleanup_free_ char *s = NULL; |
23a177ef LP |
758 | |
759 | assert(u); | |
760 | assert(name); | |
761 | ||
7410616c | 762 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 763 | if (!u->instance) |
9e2f7c11 LP |
764 | return -EINVAL; |
765 | ||
7410616c LP |
766 | r = unit_name_replace_instance(name, u->instance, &s); |
767 | if (r < 0) | |
768 | return r; | |
9e2f7c11 LP |
769 | |
770 | name = s; | |
771 | } | |
772 | ||
c2756a68 | 773 | other = manager_get_unit(u->manager, name); |
7410616c LP |
774 | if (other) |
775 | return unit_merge(u, other); | |
23a177ef | 776 | |
7410616c | 777 | return unit_add_name(u, name); |
23a177ef LP |
778 | } |
779 | ||
780 | Unit* unit_follow_merge(Unit *u) { | |
781 | assert(u); | |
782 | ||
ac155bb8 MS |
783 | while (u->load_state == UNIT_MERGED) |
784 | assert_se(u = u->merged_into); | |
23a177ef LP |
785 | |
786 | return u; | |
787 | } | |
788 | ||
789 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
790 | int r; | |
791 | ||
792 | assert(u); | |
793 | assert(c); | |
794 | ||
36be24c8 ZJS |
795 | if (c->working_directory) { |
796 | r = unit_require_mounts_for(u, c->working_directory); | |
797 | if (r < 0) | |
798 | return r; | |
799 | } | |
800 | ||
801 | if (c->root_directory) { | |
802 | r = unit_require_mounts_for(u, c->root_directory); | |
803 | if (r < 0) | |
804 | return r; | |
805 | } | |
806 | ||
b2c23da8 | 807 | if (u->manager->running_as != MANAGER_SYSTEM) |
b46a529c LP |
808 | return 0; |
809 | ||
810 | if (c->private_tmp) { | |
811 | r = unit_require_mounts_for(u, "/tmp"); | |
812 | if (r < 0) | |
813 | return r; | |
814 | ||
815 | r = unit_require_mounts_for(u, "/var/tmp"); | |
816 | if (r < 0) | |
817 | return r; | |
818 | } | |
819 | ||
ecc6e2b8 LP |
820 | if (c->std_output != EXEC_OUTPUT_KMSG && |
821 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 822 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
823 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
824 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 825 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 826 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 827 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 828 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 829 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 830 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 831 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
832 | return 0; |
833 | ||
834 | /* If syslog or kernel logging is requested, make sure our own | |
835 | * logging daemon is run first. */ | |
836 | ||
b46a529c LP |
837 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); |
838 | if (r < 0) | |
839 | return r; | |
23a177ef | 840 | |
87f0e418 LP |
841 | return 0; |
842 | } | |
843 | ||
87f0e418 LP |
844 | const char *unit_description(Unit *u) { |
845 | assert(u); | |
846 | ||
ac155bb8 MS |
847 | if (u->description) |
848 | return u->description; | |
87f0e418 | 849 | |
ac155bb8 | 850 | return strna(u->id); |
87f0e418 LP |
851 | } |
852 | ||
853 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 854 | char *t, **j; |
87f0e418 LP |
855 | UnitDependency d; |
856 | Iterator i; | |
47be870b | 857 | const char *prefix2; |
173e3821 LP |
858 | char |
859 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
860 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
861 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
862 | timestamp4[FORMAT_TIMESTAMP_MAX], |
863 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 864 | Unit *following; |
eeaedb7c LP |
865 | _cleanup_set_free_ Set *following_set = NULL; |
866 | int r; | |
87f0e418 LP |
867 | |
868 | assert(u); | |
ac155bb8 | 869 | assert(u->type >= 0); |
87f0e418 | 870 | |
4c940960 | 871 | prefix = strempty(prefix); |
63c372cb | 872 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
873 | |
874 | fprintf(f, | |
40d50879 | 875 | "%s-> Unit %s:\n" |
87f0e418 | 876 | "%s\tDescription: %s\n" |
9e2f7c11 | 877 | "%s\tInstance: %s\n" |
87f0e418 | 878 | "%s\tUnit Load State: %s\n" |
2fad8195 | 879 | "%s\tUnit Active State: %s\n" |
173e3821 | 880 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 881 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 882 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 883 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 884 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 885 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 886 | "%s\tTransient: %s\n" |
4ad49000 LP |
887 | "%s\tSlice: %s\n" |
888 | "%s\tCGroup: %s\n" | |
889 | "%s\tCGroup realized: %s\n" | |
6414b7c9 DS |
890 | "%s\tCGroup mask: 0x%x\n" |
891 | "%s\tCGroup members mask: 0x%x\n", | |
ac155bb8 | 892 | prefix, u->id, |
87f0e418 | 893 | prefix, unit_description(u), |
ac155bb8 MS |
894 | prefix, strna(u->instance), |
895 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 896 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
897 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
898 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
899 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
900 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 901 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 902 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 903 | prefix, yes_no(u->transient), |
4ad49000 LP |
904 | prefix, strna(unit_slice_name(u)), |
905 | prefix, strna(u->cgroup_path), | |
906 | prefix, yes_no(u->cgroup_realized), | |
bc432dc7 | 907 | prefix, u->cgroup_realized_mask, |
6414b7c9 | 908 | prefix, u->cgroup_members_mask); |
0301abf4 | 909 | |
ac155bb8 | 910 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
911 | fprintf(f, "%s\tName: %s\n", prefix, t); |
912 | ||
49dbfa7b LP |
913 | STRV_FOREACH(j, u->documentation) |
914 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
915 | ||
eeaedb7c LP |
916 | following = unit_following(u); |
917 | if (following) | |
ac155bb8 | 918 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 919 | |
eeaedb7c LP |
920 | r = unit_following_set(u, &following_set); |
921 | if (r >= 0) { | |
922 | Unit *other; | |
923 | ||
924 | SET_FOREACH(other, following_set, i) | |
925 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
926 | } | |
927 | ||
ac155bb8 MS |
928 | if (u->fragment_path) |
929 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 930 | |
1b64d026 LP |
931 | if (u->source_path) |
932 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
933 | ||
ae7a7182 | 934 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 935 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 936 | |
ac155bb8 | 937 | if (u->job_timeout > 0) |
2fa4092c | 938 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 939 | |
f189ab18 LP |
940 | if (u->job_timeout_action != FAILURE_ACTION_NONE) |
941 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, failure_action_to_string(u->job_timeout_action)); | |
942 | ||
943 | if (u->job_timeout_reboot_arg) | |
944 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
945 | ||
59fccdc5 LP |
946 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
947 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 948 | |
ac155bb8 | 949 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
950 | fprintf(f, |
951 | "%s\tCondition Timestamp: %s\n" | |
952 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
953 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
954 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 955 | |
59fccdc5 LP |
956 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
957 | fprintf(f, | |
958 | "%s\tAssert Timestamp: %s\n" | |
959 | "%s\tAssert Result: %s\n", | |
960 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
961 | prefix, yes_no(u->assert_result)); | |
962 | ||
87f0e418 LP |
963 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
964 | Unit *other; | |
965 | ||
ac155bb8 MS |
966 | SET_FOREACH(other, u->dependencies[d], i) |
967 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
968 | } |
969 | ||
7c8fa05c | 970 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
971 | fprintf(f, |
972 | "%s\tRequiresMountsFor:", prefix); | |
973 | ||
974 | STRV_FOREACH(j, u->requires_mounts_for) | |
975 | fprintf(f, " %s", *j); | |
976 | ||
977 | fputs("\n", f); | |
978 | } | |
979 | ||
ac155bb8 | 980 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 981 | |
b0650475 | 982 | fprintf(f, |
a40eb732 | 983 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
984 | "%s\tRefuseManualStart: %s\n" |
985 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 986 | "%s\tDefaultDependencies: %s\n" |
d420282b | 987 | "%s\tOnFailureJobMode: %s\n" |
7a6000a6 LP |
988 | "%s\tIgnoreOnIsolate: %s\n" |
989 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
990 | prefix, yes_no(u->stop_when_unneeded), |
991 | prefix, yes_no(u->refuse_manual_start), | |
992 | prefix, yes_no(u->refuse_manual_stop), | |
993 | prefix, yes_no(u->default_dependencies), | |
d420282b | 994 | prefix, job_mode_to_string(u->on_failure_job_mode), |
ac155bb8 MS |
995 | prefix, yes_no(u->ignore_on_isolate), |
996 | prefix, yes_no(u->ignore_on_snapshot)); | |
997 | ||
23a177ef LP |
998 | if (UNIT_VTABLE(u)->dump) |
999 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1000 | |
ac155bb8 | 1001 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1002 | fprintf(f, |
1003 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1004 | prefix, u->merged_into->id); |
1005 | else if (u->load_state == UNIT_ERROR) | |
1006 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 1007 | |
87f0e418 | 1008 | |
ac155bb8 MS |
1009 | if (u->job) |
1010 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1011 | |
e0209d83 MS |
1012 | if (u->nop_job) |
1013 | job_dump(u->nop_job, f, prefix2); | |
1014 | ||
87f0e418 LP |
1015 | } |
1016 | ||
1017 | /* Common implementation for multiple backends */ | |
e537352b | 1018 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1019 | int r; |
1020 | ||
1021 | assert(u); | |
23a177ef | 1022 | |
e48614c4 | 1023 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1024 | r = unit_load_fragment(u); |
1025 | if (r < 0) | |
23a177ef LP |
1026 | return r; |
1027 | ||
ac155bb8 | 1028 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1029 | return -ENOENT; |
1030 | ||
1031 | /* Load drop-in directory data */ | |
4ad49000 LP |
1032 | r = unit_load_dropin(unit_follow_merge(u)); |
1033 | if (r < 0) | |
23a177ef LP |
1034 | return r; |
1035 | ||
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | /* Common implementation for multiple backends */ | |
e537352b | 1040 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1041 | int r; |
87f0e418 LP |
1042 | |
1043 | assert(u); | |
1044 | ||
23a177ef LP |
1045 | /* Same as unit_load_fragment_and_dropin(), but whether |
1046 | * something can be loaded or not doesn't matter. */ | |
1047 | ||
1048 | /* Load a .service file */ | |
4ad49000 LP |
1049 | r = unit_load_fragment(u); |
1050 | if (r < 0) | |
87f0e418 LP |
1051 | return r; |
1052 | ||
ac155bb8 MS |
1053 | if (u->load_state == UNIT_STUB) |
1054 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1055 | |
87f0e418 | 1056 | /* Load drop-in directory data */ |
4ad49000 LP |
1057 | r = unit_load_dropin(unit_follow_merge(u)); |
1058 | if (r < 0) | |
87f0e418 LP |
1059 | return r; |
1060 | ||
23a177ef | 1061 | return 0; |
87f0e418 LP |
1062 | } |
1063 | ||
bba34eed | 1064 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1065 | assert(u); |
1066 | assert(target); | |
1067 | ||
ac155bb8 | 1068 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1069 | return 0; |
1070 | ||
35b8ca3a | 1071 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1072 | * that loop check below is reliable */ |
ac155bb8 MS |
1073 | if (u->load_state != UNIT_LOADED || |
1074 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1075 | return 0; |
1076 | ||
21256a2b LP |
1077 | /* If either side wants no automatic dependencies, then let's |
1078 | * skip this */ | |
ac155bb8 MS |
1079 | if (!u->default_dependencies || |
1080 | !target->default_dependencies) | |
21256a2b LP |
1081 | return 0; |
1082 | ||
98bc2000 | 1083 | /* Don't create loops */ |
ac155bb8 | 1084 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1085 | return 0; |
1086 | ||
1087 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
1088 | } | |
1089 | ||
e954c9cf | 1090 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 1091 | |
21256a2b LP |
1092 | static const UnitDependency deps[] = { |
1093 | UNIT_REQUIRED_BY, | |
1094 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
be7d9ff7 LP |
1095 | UNIT_REQUISITE_OF, |
1096 | UNIT_REQUISITE_OF_OVERRIDABLE, | |
21256a2b LP |
1097 | UNIT_WANTED_BY, |
1098 | UNIT_BOUND_BY | |
1099 | }; | |
1100 | ||
bba34eed | 1101 | Unit *target; |
98bc2000 | 1102 | Iterator i; |
21256a2b | 1103 | unsigned k; |
db57f3c6 | 1104 | int r = 0; |
98bc2000 LP |
1105 | |
1106 | assert(u); | |
1107 | ||
21256a2b | 1108 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
1109 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
1110 | r = unit_add_default_target_dependency(u, target); | |
1111 | if (r < 0) | |
21256a2b | 1112 | return r; |
a016b922 LP |
1113 | } |
1114 | ||
e954c9cf LP |
1115 | return r; |
1116 | } | |
4ad49000 | 1117 | |
e954c9cf LP |
1118 | static int unit_add_slice_dependencies(Unit *u) { |
1119 | assert(u); | |
b81884e7 | 1120 | |
e954c9cf LP |
1121 | if (!unit_get_cgroup_context(u)) |
1122 | return 0; | |
1123 | ||
1124 | if (UNIT_ISSET(u->slice)) | |
1125 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true); | |
1126 | ||
d1fab3fe ZJS |
1127 | if (streq(u->id, SPECIAL_ROOT_SLICE)) |
1128 | return 0; | |
1129 | ||
e954c9cf | 1130 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true); |
98bc2000 LP |
1131 | } |
1132 | ||
e954c9cf | 1133 | static int unit_add_mount_dependencies(Unit *u) { |
9588bc32 LP |
1134 | char **i; |
1135 | int r; | |
1136 | ||
1137 | assert(u); | |
1138 | ||
1139 | STRV_FOREACH(i, u->requires_mounts_for) { | |
1140 | char prefix[strlen(*i) + 1]; | |
1141 | ||
1142 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
1143 | Unit *m; | |
1144 | ||
1145 | r = manager_get_unit_by_path(u->manager, prefix, ".mount", &m); | |
1146 | if (r < 0) | |
1147 | return r; | |
1148 | if (r == 0) | |
1149 | continue; | |
1150 | if (m == u) | |
1151 | continue; | |
1152 | ||
1153 | if (m->load_state != UNIT_LOADED) | |
1154 | continue; | |
1155 | ||
1156 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1157 | if (r < 0) | |
1158 | return r; | |
1159 | ||
1160 | if (m->fragment_path) { | |
1161 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1162 | if (r < 0) | |
1163 | return r; | |
1164 | } | |
1165 | } | |
1166 | } | |
1167 | ||
1168 | return 0; | |
1169 | } | |
1170 | ||
95ae05c0 WC |
1171 | static int unit_add_startup_units(Unit *u) { |
1172 | CGroupContext *c; | |
95ae05c0 WC |
1173 | |
1174 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1175 | if (!c) |
1176 | return 0; | |
1177 | ||
1178 | if (c->startup_cpu_shares == (unsigned long) -1 && | |
1179 | c->startup_blockio_weight == (unsigned long) -1) | |
1180 | return 0; | |
1181 | ||
756c09e6 | 1182 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1183 | } |
1184 | ||
87f0e418 LP |
1185 | int unit_load(Unit *u) { |
1186 | int r; | |
1187 | ||
1188 | assert(u); | |
1189 | ||
ac155bb8 | 1190 | if (u->in_load_queue) { |
71fda00f | 1191 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1192 | u->in_load_queue = false; |
87f0e418 LP |
1193 | } |
1194 | ||
ac155bb8 | 1195 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1196 | return -EINVAL; |
1197 | ||
ac155bb8 | 1198 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1199 | return 0; |
1200 | ||
c2756a68 LP |
1201 | if (UNIT_VTABLE(u)->load) { |
1202 | r = UNIT_VTABLE(u)->load(u); | |
1203 | if (r < 0) | |
87f0e418 | 1204 | goto fail; |
c2756a68 | 1205 | } |
23a177ef | 1206 | |
ac155bb8 | 1207 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1208 | r = -ENOENT; |
1209 | goto fail; | |
1210 | } | |
1211 | ||
7c8fa05c | 1212 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1213 | |
e954c9cf LP |
1214 | r = unit_add_target_dependencies(u); |
1215 | if (r < 0) | |
1216 | goto fail; | |
1217 | ||
1218 | r = unit_add_slice_dependencies(u); | |
1219 | if (r < 0) | |
1220 | goto fail; | |
c2756a68 | 1221 | |
e954c9cf | 1222 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1223 | if (r < 0) |
c2756a68 | 1224 | goto fail; |
7c8fa05c | 1225 | |
95ae05c0 WC |
1226 | r = unit_add_startup_units(u); |
1227 | if (r < 0) | |
1228 | goto fail; | |
1229 | ||
bc432dc7 | 1230 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1231 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
c2756a68 LP |
1232 | r = -EINVAL; |
1233 | goto fail; | |
1234 | } | |
bc432dc7 LP |
1235 | |
1236 | unit_update_cgroup_members_masks(u); | |
f68319bb LP |
1237 | } |
1238 | ||
ac155bb8 | 1239 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1240 | |
1241 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1242 | unit_add_to_gc_queue(u); |
87f0e418 | 1243 | |
87f0e418 LP |
1244 | return 0; |
1245 | ||
1246 | fail: | |
c2756a68 | 1247 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1248 | u->load_error = r; |
c1e1601e | 1249 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1250 | unit_add_to_gc_queue(u); |
23a177ef | 1251 | |
f2341e0a | 1252 | log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
23a177ef | 1253 | |
87f0e418 LP |
1254 | return r; |
1255 | } | |
1256 | ||
49365733 LP |
1257 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1258 | Condition *c; | |
1259 | int triggered = -1; | |
1260 | ||
1261 | assert(u); | |
1262 | assert(to_string); | |
1263 | ||
1264 | /* If the condition list is empty, then it is true */ | |
1265 | if (!first) | |
1266 | return true; | |
1267 | ||
1268 | /* Otherwise, if all of the non-trigger conditions apply and | |
1269 | * if any of the trigger conditions apply (unless there are | |
1270 | * none) we return true */ | |
1271 | LIST_FOREACH(conditions, c, first) { | |
1272 | int r; | |
1273 | ||
1274 | r = condition_test(c); | |
1275 | if (r < 0) | |
f2341e0a LP |
1276 | log_unit_warning(u, |
1277 | "Couldn't determine result for %s=%s%s%s, assuming failed: %m", | |
49365733 LP |
1278 | to_string(c->type), |
1279 | c->trigger ? "|" : "", | |
1280 | c->negate ? "!" : "", | |
f2341e0a | 1281 | c->parameter); |
49365733 | 1282 | else |
f2341e0a LP |
1283 | log_unit_debug(u, |
1284 | "%s=%s%s%s %s.", | |
49365733 LP |
1285 | to_string(c->type), |
1286 | c->trigger ? "|" : "", | |
1287 | c->negate ? "!" : "", | |
1288 | c->parameter, | |
f2341e0a | 1289 | condition_result_to_string(c->result)); |
49365733 LP |
1290 | |
1291 | if (!c->trigger && r <= 0) | |
1292 | return false; | |
1293 | ||
1294 | if (c->trigger && triggered <= 0) | |
1295 | triggered = r > 0; | |
1296 | } | |
1297 | ||
1298 | return triggered != 0; | |
1299 | } | |
1300 | ||
9588bc32 | 1301 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1302 | assert(u); |
1303 | ||
ac155bb8 | 1304 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1305 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1306 | |
ac155bb8 | 1307 | return u->condition_result; |
90bbc946 LP |
1308 | } |
1309 | ||
59fccdc5 LP |
1310 | static bool unit_assert_test(Unit *u) { |
1311 | assert(u); | |
1312 | ||
1313 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1314 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1315 | |
1316 | return u->assert_result; | |
1317 | } | |
1318 | ||
44a6b1b6 | 1319 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
c6918296 | 1320 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1321 | |
1322 | assert(u); | |
1323 | assert(t >= 0); | |
1324 | assert(t < _JOB_TYPE_MAX); | |
1325 | ||
1326 | if (t != JOB_START && t != JOB_STOP) | |
1327 | return NULL; | |
c6918296 MS |
1328 | |
1329 | format_table = &UNIT_VTABLE(u)->status_message_formats; | |
1330 | if (!format_table) | |
877d54e9 LP |
1331 | return NULL; |
1332 | ||
1333 | return format_table->starting_stopping[t == JOB_STOP]; | |
1334 | } | |
1335 | ||
44a6b1b6 | 1336 | _pure_ static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) { |
877d54e9 LP |
1337 | const char *format; |
1338 | ||
1339 | assert(u); | |
1340 | assert(t >= 0); | |
1341 | assert(t < _JOB_TYPE_MAX); | |
1342 | ||
1343 | format = unit_get_status_message_format(u, t); | |
1344 | if (format) | |
1345 | return format; | |
1346 | ||
1347 | /* Return generic strings */ | |
1348 | if (t == JOB_START) | |
1349 | return "Starting %s."; | |
1350 | else if (t == JOB_STOP) | |
1351 | return "Stopping %s."; | |
1352 | else if (t == JOB_RELOAD) | |
1353 | return "Reloading %s."; | |
1354 | ||
1355 | return NULL; | |
1356 | } | |
1357 | ||
1358 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1359 | const char *format; | |
1360 | ||
1361 | assert(u); | |
1362 | ||
1363 | /* We only print status messages for selected units on | |
1364 | * selected operations. */ | |
c6918296 | 1365 | |
877d54e9 | 1366 | format = unit_get_status_message_format(u, t); |
c6918296 MS |
1367 | if (!format) |
1368 | return; | |
1369 | ||
bcfce235 | 1370 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1371 | unit_status_printf(u, "", format); |
bcfce235 | 1372 | REENABLE_WARNING; |
c6918296 MS |
1373 | } |
1374 | ||
877d54e9 LP |
1375 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
1376 | const char *format; | |
1377 | char buf[LINE_MAX]; | |
1378 | sd_id128_t mid; | |
1379 | ||
1380 | assert(u); | |
1381 | ||
1382 | if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD) | |
1383 | return; | |
1384 | ||
81270860 LP |
1385 | if (log_on_console()) |
1386 | return; | |
1387 | ||
877d54e9 LP |
1388 | /* We log status messages for all units and all operations. */ |
1389 | ||
1390 | format = unit_get_status_message_format_try_harder(u, t); | |
1391 | if (!format) | |
1392 | return; | |
1393 | ||
bcfce235 | 1394 | DISABLE_WARNING_FORMAT_NONLITERAL; |
877d54e9 | 1395 | snprintf(buf, sizeof(buf), format, unit_description(u)); |
bcfce235 | 1396 | REENABLE_WARNING; |
877d54e9 LP |
1397 | |
1398 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1399 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1400 | SD_MESSAGE_UNIT_RELOADING; | |
1401 | ||
f2341e0a LP |
1402 | /* Note that we deliberately use LOG_MESSAGE() instead of |
1403 | * LOG_UNIT_MESSAGE() here, since this is supposed to mimic | |
1404 | * closely what is written to screen using the status output, | |
1405 | * which is supposed the highest level, friendliest output | |
1406 | * possible, which means we should avoid the low-level unit | |
1407 | * name. */ | |
1408 | log_struct(LOG_INFO, | |
1409 | LOG_MESSAGE_ID(mid), | |
1410 | LOG_UNIT_ID(u), | |
1411 | LOG_MESSAGE("%s", buf), | |
1412 | NULL); | |
877d54e9 | 1413 | } |
877d54e9 | 1414 | |
87f0e418 | 1415 | /* Errors: |
d5159713 LP |
1416 | * -EBADR: This unit type does not support starting. |
1417 | * -EALREADY: Unit is already started. | |
1418 | * -EAGAIN: An operation is already in progress. Retry later. | |
1419 | * -ECANCELED: Too many requests for now. | |
59fccdc5 | 1420 | * -EPROTO: Assert failed |
87f0e418 LP |
1421 | */ |
1422 | int unit_start(Unit *u) { | |
1423 | UnitActiveState state; | |
92ab323c | 1424 | Unit *following; |
82a2b6bb | 1425 | int r; |
87f0e418 LP |
1426 | |
1427 | assert(u); | |
1428 | ||
ac155bb8 | 1429 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1430 | return -EINVAL; |
1431 | ||
a82e5507 LP |
1432 | /* If this is already started, then this will succeed. Note |
1433 | * that this will even succeed if this unit is not startable | |
1434 | * by the user. This is relied on to detect when we need to | |
1435 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1436 | state = unit_active_state(u); |
1437 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1438 | return -EALREADY; | |
1439 | ||
a82e5507 LP |
1440 | /* If the conditions failed, don't do anything at all. If we |
1441 | * already are activating this call might still be useful to | |
1442 | * speed up activation in case there is some hold-off time, | |
1443 | * but we don't want to recheck the condition in that case. */ | |
1444 | if (state != UNIT_ACTIVATING && | |
1445 | !unit_condition_test(u)) { | |
f2341e0a | 1446 | log_unit_debug(u, "Starting requested but condition failed. Not starting unit."); |
52661efd LP |
1447 | return -EALREADY; |
1448 | } | |
1449 | ||
59fccdc5 LP |
1450 | /* If the asserts failed, fail the entire job */ |
1451 | if (state != UNIT_ACTIVATING && | |
1452 | !unit_assert_test(u)) { | |
f2341e0a | 1453 | log_unit_notice(u, "Starting requested but asserts failed."); |
59fccdc5 LP |
1454 | return -EPROTO; |
1455 | } | |
1456 | ||
92ab323c | 1457 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1458 | following = unit_following(u); |
1459 | if (following) { | |
f2341e0a | 1460 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1461 | return unit_start(following); |
1462 | } | |
1463 | ||
1c2e9646 | 1464 | if (!unit_supported(u)) |
15411c0c | 1465 | return -EOPNOTSUPP; |
0faacd47 | 1466 | |
92ab323c LP |
1467 | /* If it is stopped, but we cannot start it, then fail */ |
1468 | if (!UNIT_VTABLE(u)->start) | |
1469 | return -EBADR; | |
1470 | ||
87f0e418 LP |
1471 | /* We don't suppress calls to ->start() here when we are |
1472 | * already starting, to allow this request to be used as a | |
1473 | * "hurry up" call, for example when the unit is in some "auto | |
1474 | * restart" state where it waits for a holdoff timer to elapse | |
1475 | * before it will start again. */ | |
1476 | ||
c1e1601e | 1477 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1478 | |
82a2b6bb LP |
1479 | r = UNIT_VTABLE(u)->start(u); |
1480 | if (r <= 0) | |
1481 | return r; | |
1482 | ||
1483 | /* Log if the start function actually did something */ | |
1484 | unit_status_log_starting_stopping_reloading(u, JOB_START); | |
1485 | unit_status_print_starting_stopping(u, JOB_START); | |
1486 | return r; | |
87f0e418 LP |
1487 | } |
1488 | ||
1489 | bool unit_can_start(Unit *u) { | |
1490 | assert(u); | |
1491 | ||
1492 | return !!UNIT_VTABLE(u)->start; | |
1493 | } | |
1494 | ||
2528a7a6 LP |
1495 | bool unit_can_isolate(Unit *u) { |
1496 | assert(u); | |
1497 | ||
1498 | return unit_can_start(u) && | |
ac155bb8 | 1499 | u->allow_isolate; |
2528a7a6 LP |
1500 | } |
1501 | ||
87f0e418 LP |
1502 | /* Errors: |
1503 | * -EBADR: This unit type does not support stopping. | |
1504 | * -EALREADY: Unit is already stopped. | |
1505 | * -EAGAIN: An operation is already in progress. Retry later. | |
1506 | */ | |
1507 | int unit_stop(Unit *u) { | |
1508 | UnitActiveState state; | |
92ab323c | 1509 | Unit *following; |
82a2b6bb | 1510 | int r; |
87f0e418 LP |
1511 | |
1512 | assert(u); | |
1513 | ||
87f0e418 | 1514 | state = unit_active_state(u); |
fdf20a31 | 1515 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1516 | return -EALREADY; |
1517 | ||
0faacd47 LP |
1518 | following = unit_following(u); |
1519 | if (following) { | |
f2341e0a | 1520 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1521 | return unit_stop(following); |
1522 | } | |
1523 | ||
7898b0cf LP |
1524 | if (!UNIT_VTABLE(u)->stop) |
1525 | return -EBADR; | |
1526 | ||
c1e1601e | 1527 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1528 | |
82a2b6bb LP |
1529 | r = UNIT_VTABLE(u)->stop(u); |
1530 | if (r <= 0) | |
1531 | return r; | |
1532 | ||
1533 | unit_status_log_starting_stopping_reloading(u, JOB_STOP); | |
1534 | unit_status_print_starting_stopping(u, JOB_STOP); | |
1535 | return r; | |
87f0e418 LP |
1536 | } |
1537 | ||
1538 | /* Errors: | |
1539 | * -EBADR: This unit type does not support reloading. | |
1540 | * -ENOEXEC: Unit is not started. | |
1541 | * -EAGAIN: An operation is already in progress. Retry later. | |
1542 | */ | |
1543 | int unit_reload(Unit *u) { | |
1544 | UnitActiveState state; | |
92ab323c | 1545 | Unit *following; |
82a2b6bb | 1546 | int r; |
87f0e418 LP |
1547 | |
1548 | assert(u); | |
1549 | ||
ac155bb8 | 1550 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1551 | return -EINVAL; |
1552 | ||
87f0e418 LP |
1553 | if (!unit_can_reload(u)) |
1554 | return -EBADR; | |
1555 | ||
1556 | state = unit_active_state(u); | |
e364ad06 | 1557 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1558 | return -EALREADY; |
1559 | ||
6a371e23 | 1560 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1561 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1562 | return -ENOEXEC; |
6a371e23 | 1563 | } |
87f0e418 | 1564 | |
e48614c4 ZJS |
1565 | following = unit_following(u); |
1566 | if (following) { | |
f2341e0a | 1567 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1568 | return unit_reload(following); |
1569 | } | |
1570 | ||
c1e1601e | 1571 | unit_add_to_dbus_queue(u); |
82a2b6bb LP |
1572 | |
1573 | r = UNIT_VTABLE(u)->reload(u); | |
1574 | if (r <= 0) | |
1575 | return r; | |
1576 | ||
1577 | unit_status_log_starting_stopping_reloading(u, JOB_RELOAD); | |
1578 | return r; | |
87f0e418 LP |
1579 | } |
1580 | ||
1581 | bool unit_can_reload(Unit *u) { | |
1582 | assert(u); | |
1583 | ||
1584 | if (!UNIT_VTABLE(u)->reload) | |
1585 | return false; | |
1586 | ||
1587 | if (!UNIT_VTABLE(u)->can_reload) | |
1588 | return true; | |
1589 | ||
1590 | return UNIT_VTABLE(u)->can_reload(u); | |
1591 | } | |
1592 | ||
b4a16b7b | 1593 | static void unit_check_unneeded(Unit *u) { |
be7d9ff7 LP |
1594 | |
1595 | static const UnitDependency needed_dependencies[] = { | |
1596 | UNIT_REQUIRED_BY, | |
1597 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
1598 | UNIT_REQUISITE, | |
1599 | UNIT_REQUISITE_OF_OVERRIDABLE, | |
1600 | UNIT_WANTED_BY, | |
1601 | UNIT_BOUND_BY, | |
1602 | }; | |
1603 | ||
f3bff0eb | 1604 | Unit *other; |
be7d9ff7 LP |
1605 | Iterator i; |
1606 | unsigned j; | |
1607 | int r; | |
f3bff0eb LP |
1608 | |
1609 | assert(u); | |
1610 | ||
1611 | /* If this service shall be shut down when unneeded then do | |
1612 | * so. */ | |
1613 | ||
ac155bb8 | 1614 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1615 | return; |
1616 | ||
1617 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1618 | return; | |
1619 | ||
be7d9ff7 | 1620 | for (j = 0; j < ELEMENTSOF(needed_dependencies); j++) |
f3b85044 | 1621 | SET_FOREACH(other, u->dependencies[needed_dependencies[j]], i) |
be7d9ff7 LP |
1622 | if (unit_active_or_pending(other)) |
1623 | return; | |
b81884e7 | 1624 | |
f2341e0a | 1625 | log_unit_info(u, "Unit not needed anymore. Stopping."); |
f3bff0eb LP |
1626 | |
1627 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
be7d9ff7 LP |
1628 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
1629 | if (r < 0) | |
1630 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %m"); | |
f3bff0eb LP |
1631 | } |
1632 | ||
ff502445 LP |
1633 | static void unit_check_binds_to(Unit *u) { |
1634 | bool stop = false; | |
1635 | Unit *other; | |
1636 | Iterator i; | |
1637 | ||
1638 | assert(u); | |
1639 | ||
1640 | if (u->job) | |
1641 | return; | |
1642 | ||
1643 | if (unit_active_state(u) != UNIT_ACTIVE) | |
1644 | return; | |
1645 | ||
1646 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) { | |
1647 | if (other->job) | |
1648 | continue; | |
1649 | ||
1650 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1651 | continue; | |
1652 | ||
1653 | stop = true; | |
98f738b6 | 1654 | break; |
ff502445 LP |
1655 | } |
1656 | ||
1657 | if (!stop) | |
1658 | return; | |
1659 | ||
98f738b6 | 1660 | assert(other); |
f2341e0a | 1661 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
1662 | |
1663 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
1664 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); | |
1665 | } | |
1666 | ||
87f0e418 LP |
1667 | static void retroactively_start_dependencies(Unit *u) { |
1668 | Iterator i; | |
1669 | Unit *other; | |
1670 | ||
1671 | assert(u); | |
1672 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1673 | ||
ac155bb8 MS |
1674 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1675 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1676 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1677 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1678 | |
7f2cddae | 1679 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1680 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1681 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1682 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1683 | |
ac155bb8 MS |
1684 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
1685 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1686 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1687 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1688 | |
ac155bb8 MS |
1689 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1690 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1691 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1692 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1693 | |
ac155bb8 | 1694 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1695 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1696 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1697 | |
ac155bb8 | 1698 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1699 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1700 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1701 | } |
1702 | ||
1703 | static void retroactively_stop_dependencies(Unit *u) { | |
1704 | Iterator i; | |
1705 | Unit *other; | |
1706 | ||
1707 | assert(u); | |
1708 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1709 | ||
b81884e7 | 1710 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1711 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1712 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1713 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1714 | } |
1715 | ||
1716 | static void check_unneeded_dependencies(Unit *u) { | |
1717 | Iterator i; | |
1718 | Unit *other; | |
1719 | ||
1720 | assert(u); | |
1721 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1722 | |
1723 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1724 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1725 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1726 | unit_check_unneeded(other); |
ac155bb8 | 1727 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1728 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1729 | unit_check_unneeded(other); |
ac155bb8 | 1730 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1731 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1732 | unit_check_unneeded(other); |
ac155bb8 | 1733 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1734 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1735 | unit_check_unneeded(other); |
ac155bb8 | 1736 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1737 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1738 | unit_check_unneeded(other); |
7f2cddae | 1739 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1740 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1741 | unit_check_unneeded(other); | |
87f0e418 LP |
1742 | } |
1743 | ||
3ecaa09b | 1744 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1745 | Unit *other; |
1746 | Iterator i; | |
1747 | ||
1748 | assert(u); | |
1749 | ||
ac155bb8 | 1750 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1751 | return; |
1752 | ||
f2341e0a | 1753 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 1754 | |
ac155bb8 | 1755 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1756 | int r; |
1757 | ||
d420282b | 1758 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, true, NULL, NULL); |
c1b6628d | 1759 | if (r < 0) |
f2341e0a | 1760 | log_unit_error_errno(u, r, "Failed to enqueue OnFailure= job: %m"); |
222ae6a8 | 1761 | } |
c0daa706 LP |
1762 | } |
1763 | ||
3ecaa09b LP |
1764 | void unit_trigger_notify(Unit *u) { |
1765 | Unit *other; | |
1766 | Iterator i; | |
1767 | ||
1768 | assert(u); | |
1769 | ||
1770 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1771 | if (UNIT_VTABLE(other)->trigger_notify) | |
1772 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1773 | } | |
1774 | ||
e2f3b44c | 1775 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 1776 | Manager *m; |
7e6e7b06 | 1777 | bool unexpected; |
a096ed36 | 1778 | |
87f0e418 LP |
1779 | assert(u); |
1780 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1781 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1782 | |
8e471ccd LP |
1783 | /* Note that this is called for all low-level state changes, |
1784 | * even if they might map to the same high-level | |
865cc19a | 1785 | * UnitActiveState! That means that ns == os is an expected |
c5315881 | 1786 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1787 | * this function will be called too! */ |
87f0e418 | 1788 | |
546ac4f0 MS |
1789 | m = u->manager; |
1790 | ||
f755e3b7 | 1791 | /* Update timestamps for state changes */ |
546ac4f0 | 1792 | if (m->n_reloading <= 0) { |
bdbf9951 | 1793 | dual_timestamp ts; |
173e3821 | 1794 | |
bdbf9951 | 1795 | dual_timestamp_get(&ts); |
173e3821 | 1796 | |
bdbf9951 | 1797 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1798 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1799 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1800 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1801 | |
1802 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1803 | u->active_enter_timestamp = ts; |
bdbf9951 | 1804 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1805 | u->active_exit_timestamp = ts; |
bdbf9951 | 1806 | } |
87f0e418 | 1807 | |
865cc19a | 1808 | /* Keep track of failed units */ |
03455c28 | 1809 | manager_update_failed_units(u->manager, u, ns == UNIT_FAILED); |
f755e3b7 LP |
1810 | |
1811 | /* Make sure the cgroup is always removed when we become inactive */ | |
fdf20a31 | 1812 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
b1491eba | 1813 | unit_destroy_cgroup_if_empty(u); |
fb385181 | 1814 | |
9cd86184 | 1815 | /* Note that this doesn't apply to RemainAfterExit services exiting |
6f285378 | 1816 | * successfully, since there's no change of state in that case. Which is |
9cd86184 | 1817 | * why it is handled in service_set_state() */ |
7ed9f6cd | 1818 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
1819 | ExecContext *ec; |
1820 | ||
1821 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 1822 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 ZJS |
1823 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
1824 | m->n_on_console --; | |
1825 | ||
1826 | if (m->n_on_console == 0) | |
1827 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 1828 | m->no_console_output = false; |
31a7eb86 ZJS |
1829 | } else |
1830 | m->n_on_console ++; | |
7ed9f6cd MS |
1831 | } |
1832 | } | |
1833 | ||
ac155bb8 | 1834 | if (u->job) { |
7e6e7b06 | 1835 | unexpected = false; |
87f0e418 | 1836 | |
ac155bb8 | 1837 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1838 | |
1839 | /* So we reached a different state for this | |
1840 | * job. Let's see if we can run it now if it | |
1841 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1842 | job_add_to_run_queue(u->job); |
87f0e418 | 1843 | |
b410e6b9 | 1844 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1845 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1846 | * hence needs to invalidate jobs. */ |
87f0e418 | 1847 | |
ac155bb8 | 1848 | switch (u->job->type) { |
87f0e418 | 1849 | |
b410e6b9 LP |
1850 | case JOB_START: |
1851 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1852 | |
b410e6b9 | 1853 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1854 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1855 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1856 | unexpected = true; |
41b02ec7 | 1857 | |
fdf20a31 | 1858 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1859 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1860 | } |
87f0e418 | 1861 | |
b410e6b9 | 1862 | break; |
87f0e418 | 1863 | |
b410e6b9 LP |
1864 | case JOB_RELOAD: |
1865 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1866 | |
ac155bb8 | 1867 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1868 | if (ns == UNIT_ACTIVE) |
5273510e | 1869 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1870 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1871 | unexpected = true; |
41b02ec7 | 1872 | |
fdf20a31 | 1873 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1874 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1875 | } |
b410e6b9 | 1876 | } |
87f0e418 | 1877 | |
b410e6b9 | 1878 | break; |
87f0e418 | 1879 | |
b410e6b9 LP |
1880 | case JOB_STOP: |
1881 | case JOB_RESTART: | |
1882 | case JOB_TRY_RESTART: | |
87f0e418 | 1883 | |
fdf20a31 | 1884 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1885 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1886 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1887 | unexpected = true; |
5273510e | 1888 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1889 | } |
87f0e418 | 1890 | |
b410e6b9 | 1891 | break; |
87f0e418 | 1892 | |
b410e6b9 LP |
1893 | default: |
1894 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1895 | } |
87f0e418 | 1896 | |
7e6e7b06 LP |
1897 | } else |
1898 | unexpected = true; | |
1899 | ||
546ac4f0 | 1900 | if (m->n_reloading <= 0) { |
f3bff0eb | 1901 | |
bdbf9951 LP |
1902 | /* If this state change happened without being |
1903 | * requested by a job, then let's retroactively start | |
1904 | * or stop dependencies. We skip that step when | |
1905 | * deserializing, since we don't want to create any | |
1906 | * additional jobs just because something is already | |
1907 | * activated. */ | |
1908 | ||
1909 | if (unexpected) { | |
1910 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1911 | retroactively_start_dependencies(u); | |
1912 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1913 | retroactively_stop_dependencies(u); | |
1914 | } | |
5de9682c | 1915 | |
cd0504d0 | 1916 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 1917 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
1918 | check_unneeded_dependencies(u); |
1919 | ||
bdbf9951 | 1920 | if (ns != os && ns == UNIT_FAILED) { |
f2341e0a | 1921 | log_unit_notice(u, "Unit entered failed state."); |
3ecaa09b | 1922 | unit_start_on_failure(u); |
cd6d0a45 | 1923 | } |
3b2775c5 | 1924 | } |
e537352b | 1925 | |
3b2775c5 LP |
1926 | /* Some names are special */ |
1927 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1928 | ||
1929 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
865cc19a | 1930 | /* The bus might have just become available, |
3b2775c5 LP |
1931 | * hence try to connect to it, if we aren't |
1932 | * yet connected. */ | |
546ac4f0 | 1933 | bus_init(m, true); |
3b2775c5 | 1934 | |
ac155bb8 | 1935 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1936 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
546ac4f0 | 1937 | m->n_reloading <= 0) { |
3b2775c5 | 1938 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 1939 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 1940 | u->in_audit = true; |
3b2775c5 | 1941 | } |
e983b760 | 1942 | |
3b2775c5 | 1943 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 1944 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 1945 | |
3b2775c5 | 1946 | } else { |
bdbf9951 | 1947 | |
3b2775c5 LP |
1948 | /* We don't care about D-Bus here, since we'll get an |
1949 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1950 | |
ac155bb8 | 1951 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1952 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1953 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
546ac4f0 | 1954 | m->n_reloading <= 0) { |
4927fcae | 1955 | |
3b2775c5 LP |
1956 | /* Hmm, if there was no start record written |
1957 | * write it now, so that we always have a nice | |
1958 | * pair */ | |
ac155bb8 | 1959 | if (!u->in_audit) { |
546ac4f0 | 1960 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 1961 | |
3b2775c5 | 1962 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 1963 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1964 | } else |
1965 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 1966 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1967 | |
ac155bb8 | 1968 | u->in_audit = false; |
cd6d0a45 | 1969 | } |
f278026d LP |
1970 | } |
1971 | ||
546ac4f0 | 1972 | manager_recheck_journal(m); |
3ecaa09b | 1973 | unit_trigger_notify(u); |
3b2775c5 | 1974 | |
ff502445 LP |
1975 | if (u->manager->n_reloading <= 0) { |
1976 | /* Maybe we finished startup and are now ready for | |
1977 | * being stopped because unneeded? */ | |
bf6dcfa6 | 1978 | unit_check_unneeded(u); |
c1e1601e | 1979 | |
ff502445 LP |
1980 | /* Maybe we finished startup, but something we needed |
1981 | * has vanished? Let's die then. (This happens when | |
1982 | * something BindsTo= to a Type=oneshot unit, as these | |
1983 | * units go directly from starting to inactive, | |
1984 | * without ever entering started.) */ | |
1985 | unit_check_binds_to(u); | |
1986 | } | |
1987 | ||
c1e1601e | 1988 | unit_add_to_dbus_queue(u); |
701cc384 | 1989 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1990 | } |
1991 | ||
87f0e418 | 1992 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
1993 | int q, r; |
1994 | ||
87f0e418 LP |
1995 | assert(u); |
1996 | assert(pid >= 1); | |
1997 | ||
5ba6985b LP |
1998 | /* Watch a specific PID. We only support one or two units |
1999 | * watching each PID for now, not more. */ | |
2000 | ||
d5099efc | 2001 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2002 | if (r < 0) |
2003 | return r; | |
2004 | ||
d5099efc | 2005 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL); |
a911bb9a LP |
2006 | if (r < 0) |
2007 | return r; | |
2008 | ||
5ba6985b LP |
2009 | r = hashmap_put(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
2010 | if (r == -EEXIST) { | |
d5099efc | 2011 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL); |
5ba6985b LP |
2012 | if (r < 0) |
2013 | return r; | |
05e343b7 | 2014 | |
5ba6985b LP |
2015 | r = hashmap_put(u->manager->watch_pids2, LONG_TO_PTR(pid), u); |
2016 | } | |
a911bb9a | 2017 | |
5ba6985b | 2018 | q = set_put(u->pids, LONG_TO_PTR(pid)); |
a911bb9a LP |
2019 | if (q < 0) |
2020 | return q; | |
2021 | ||
2022 | return r; | |
87f0e418 LP |
2023 | } |
2024 | ||
2025 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
2026 | assert(u); | |
2027 | assert(pid >= 1); | |
2028 | ||
5ba6985b LP |
2029 | hashmap_remove_value(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
2030 | hashmap_remove_value(u->manager->watch_pids2, LONG_TO_PTR(pid), u); | |
a911bb9a LP |
2031 | set_remove(u->pids, LONG_TO_PTR(pid)); |
2032 | } | |
2033 | ||
bd44e61b LP |
2034 | void unit_unwatch_all_pids(Unit *u) { |
2035 | assert(u); | |
2036 | ||
2037 | while (!set_isempty(u->pids)) | |
2038 | unit_unwatch_pid(u, PTR_TO_LONG(set_first(u->pids))); | |
2039 | ||
2040 | set_free(u->pids); | |
2041 | u->pids = NULL; | |
2042 | } | |
2043 | ||
2044 | static int unit_watch_pids_in_path(Unit *u, const char *path) { | |
a911bb9a LP |
2045 | _cleanup_closedir_ DIR *d = NULL; |
2046 | _cleanup_fclose_ FILE *f = NULL; | |
2047 | int ret = 0, r; | |
2048 | ||
2049 | assert(u); | |
2050 | assert(path); | |
2051 | ||
2052 | /* Adds all PIDs from a specific cgroup path to the set of PIDs we watch. */ | |
2053 | ||
2054 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f); | |
2055 | if (r >= 0) { | |
2056 | pid_t pid; | |
2057 | ||
2058 | while ((r = cg_read_pid(f, &pid)) > 0) { | |
2059 | r = unit_watch_pid(u, pid); | |
2060 | if (r < 0 && ret >= 0) | |
2061 | ret = r; | |
2062 | } | |
2063 | if (r < 0 && ret >= 0) | |
2064 | ret = r; | |
2065 | ||
2066 | } else if (ret >= 0) | |
2067 | ret = r; | |
2068 | ||
2069 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d); | |
2070 | if (r >= 0) { | |
2071 | char *fn; | |
2072 | ||
2073 | while ((r = cg_read_subgroup(d, &fn)) > 0) { | |
2074 | _cleanup_free_ char *p = NULL; | |
2075 | ||
2076 | p = strjoin(path, "/", fn, NULL); | |
2077 | free(fn); | |
2078 | ||
2079 | if (!p) | |
2080 | return -ENOMEM; | |
2081 | ||
bd44e61b | 2082 | r = unit_watch_pids_in_path(u, p); |
a911bb9a LP |
2083 | if (r < 0 && ret >= 0) |
2084 | ret = r; | |
2085 | } | |
2086 | if (r < 0 && ret >= 0) | |
2087 | ret = r; | |
2088 | ||
2089 | } else if (ret >= 0) | |
2090 | ret = r; | |
2091 | ||
2092 | return ret; | |
2093 | } | |
2094 | ||
a911bb9a LP |
2095 | int unit_watch_all_pids(Unit *u) { |
2096 | assert(u); | |
2097 | ||
a911bb9a LP |
2098 | /* Adds all PIDs from our cgroup to the set of PIDs we watch */ |
2099 | ||
bd44e61b LP |
2100 | if (!u->cgroup_path) |
2101 | return -ENOENT; | |
a911bb9a | 2102 | |
bd44e61b | 2103 | return unit_watch_pids_in_path(u, u->cgroup_path); |
a911bb9a LP |
2104 | } |
2105 | ||
2106 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2107 | Iterator i; | |
2108 | void *e; | |
2109 | ||
2110 | assert(u); | |
2111 | ||
2112 | /* Cleans dead PIDs from our list */ | |
2113 | ||
2114 | SET_FOREACH(e, u->pids, i) { | |
2115 | pid_t pid = PTR_TO_LONG(e); | |
2116 | ||
2117 | if (pid == except1 || pid == except2) | |
2118 | continue; | |
2119 | ||
9f5650ae | 2120 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2121 | unit_unwatch_pid(u, pid); |
a911bb9a | 2122 | } |
87f0e418 LP |
2123 | } |
2124 | ||
87f0e418 LP |
2125 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2126 | assert(u); | |
2127 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2128 | ||
2129 | switch (j) { | |
2130 | ||
2131 | case JOB_VERIFY_ACTIVE: | |
2132 | case JOB_START: | |
57339f47 | 2133 | case JOB_STOP: |
e0209d83 | 2134 | case JOB_NOP: |
87f0e418 LP |
2135 | return true; |
2136 | ||
87f0e418 LP |
2137 | case JOB_RESTART: |
2138 | case JOB_TRY_RESTART: | |
2139 | return unit_can_start(u); | |
2140 | ||
2141 | case JOB_RELOAD: | |
2142 | return unit_can_reload(u); | |
2143 | ||
2144 | case JOB_RELOAD_OR_START: | |
2145 | return unit_can_reload(u) && unit_can_start(u); | |
2146 | ||
2147 | default: | |
2148 | assert_not_reached("Invalid job type"); | |
2149 | } | |
2150 | } | |
2151 | ||
f2341e0a LP |
2152 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2153 | assert(u); | |
d1fab3fe | 2154 | |
f2341e0a LP |
2155 | /* Only warn about some unit types */ |
2156 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2157 | return; | |
3f3cc397 | 2158 | |
f2341e0a LP |
2159 | if (streq_ptr(u->id, other)) |
2160 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2161 | else | |
2162 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2163 | } |
2164 | ||
701cc384 | 2165 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
2166 | |
2167 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2168 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 2169 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 | 2170 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 LP |
2171 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
2172 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUISITE_OF_OVERRIDABLE, | |
7f2cddae | 2173 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2174 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 LP |
2175 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
2176 | [UNIT_REQUIRED_BY_OVERRIDABLE] = UNIT_REQUIRES_OVERRIDABLE, | |
2177 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, | |
2178 | [UNIT_REQUISITE_OF_OVERRIDABLE] = UNIT_REQUISITE_OVERRIDABLE, | |
2179 | [UNIT_WANTED_BY] = UNIT_WANTS, | |
7f2cddae | 2180 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2181 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2182 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2183 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2184 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2185 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2186 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2187 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2188 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2189 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2190 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2191 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2192 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2193 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2194 | }; |
701cc384 | 2195 | int r, q = 0, v = 0, w = 0; |
d1fab3fe | 2196 | Unit *orig_u = u, *orig_other = other; |
87f0e418 LP |
2197 | |
2198 | assert(u); | |
2199 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2200 | assert(other); |
2201 | ||
9f151f29 LP |
2202 | u = unit_follow_merge(u); |
2203 | other = unit_follow_merge(other); | |
2204 | ||
87f0e418 LP |
2205 | /* We won't allow dependencies on ourselves. We will not |
2206 | * consider them an error however. */ | |
d1fab3fe | 2207 | if (u == other) { |
f2341e0a | 2208 | maybe_warn_about_dependency(orig_u, orig_other->id, d); |
87f0e418 | 2209 | return 0; |
d1fab3fe | 2210 | } |
87f0e418 | 2211 | |
d5099efc | 2212 | r = set_ensure_allocated(&u->dependencies[d], NULL); |
613b411c | 2213 | if (r < 0) |
87f0e418 LP |
2214 | return r; |
2215 | ||
613b411c | 2216 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
d5099efc | 2217 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], NULL); |
613b411c LP |
2218 | if (r < 0) |
2219 | return r; | |
2220 | } | |
2221 | ||
2222 | if (add_reference) { | |
d5099efc | 2223 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], NULL); |
613b411c | 2224 | if (r < 0) |
5de9682c LP |
2225 | return r; |
2226 | ||
d5099efc | 2227 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], NULL); |
613b411c | 2228 | if (r < 0) |
701cc384 | 2229 | return r; |
613b411c | 2230 | } |
87f0e418 | 2231 | |
613b411c LP |
2232 | q = set_put(u->dependencies[d], other); |
2233 | if (q < 0) | |
701cc384 | 2234 | return q; |
87f0e418 | 2235 | |
613b411c LP |
2236 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2237 | v = set_put(other->dependencies[inverse_table[d]], u); | |
2238 | if (v < 0) { | |
5de9682c LP |
2239 | r = v; |
2240 | goto fail; | |
2241 | } | |
613b411c | 2242 | } |
701cc384 LP |
2243 | |
2244 | if (add_reference) { | |
613b411c LP |
2245 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
2246 | if (w < 0) { | |
701cc384 LP |
2247 | r = w; |
2248 | goto fail; | |
2249 | } | |
2250 | ||
613b411c LP |
2251 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
2252 | if (r < 0) | |
701cc384 | 2253 | goto fail; |
87f0e418 LP |
2254 | } |
2255 | ||
c1e1601e | 2256 | unit_add_to_dbus_queue(u); |
87f0e418 | 2257 | return 0; |
701cc384 LP |
2258 | |
2259 | fail: | |
2260 | if (q > 0) | |
ac155bb8 | 2261 | set_remove(u->dependencies[d], other); |
701cc384 LP |
2262 | |
2263 | if (v > 0) | |
ac155bb8 | 2264 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
2265 | |
2266 | if (w > 0) | |
ac155bb8 | 2267 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
2268 | |
2269 | return r; | |
87f0e418 | 2270 | } |
0301abf4 | 2271 | |
2c966c03 LP |
2272 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
2273 | int r; | |
2274 | ||
2275 | assert(u); | |
2276 | ||
3f3cc397 LP |
2277 | r = unit_add_dependency(u, d, other, add_reference); |
2278 | if (r < 0) | |
2c966c03 LP |
2279 | return r; |
2280 | ||
7410616c | 2281 | return unit_add_dependency(u, e, other, add_reference); |
2c966c03 LP |
2282 | } |
2283 | ||
7410616c LP |
2284 | static int resolve_template(Unit *u, const char *name, const char*path, char **buf, const char **ret) { |
2285 | int r; | |
9e2f7c11 LP |
2286 | |
2287 | assert(u); | |
2288 | assert(name || path); | |
7410616c LP |
2289 | assert(buf); |
2290 | assert(ret); | |
9e2f7c11 LP |
2291 | |
2292 | if (!name) | |
2b6bf07d | 2293 | name = basename(path); |
9e2f7c11 | 2294 | |
7410616c LP |
2295 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2296 | *buf = NULL; | |
2297 | *ret = name; | |
2298 | return 0; | |
9e2f7c11 LP |
2299 | } |
2300 | ||
ac155bb8 | 2301 | if (u->instance) |
7410616c | 2302 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 2303 | else { |
ae018d9b | 2304 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2305 | |
7410616c LP |
2306 | r = unit_name_to_prefix(u->id, &i); |
2307 | if (r < 0) | |
2308 | return r; | |
9e2f7c11 | 2309 | |
7410616c | 2310 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 2311 | } |
7410616c LP |
2312 | if (r < 0) |
2313 | return r; | |
9e2f7c11 | 2314 | |
7410616c LP |
2315 | *ret = *buf; |
2316 | return 0; | |
9e2f7c11 LP |
2317 | } |
2318 | ||
701cc384 | 2319 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
7410616c | 2320 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
2321 | Unit *other; |
2322 | int r; | |
2323 | ||
9e2f7c11 LP |
2324 | assert(u); |
2325 | assert(name || path); | |
09b6b09f | 2326 | |
7410616c LP |
2327 | r = resolve_template(u, name, path, &buf, &name); |
2328 | if (r < 0) | |
2329 | return r; | |
09b6b09f | 2330 | |
8afbb8e1 LP |
2331 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2332 | if (r < 0) | |
2333 | return r; | |
9e2f7c11 | 2334 | |
8afbb8e1 | 2335 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
2336 | } |
2337 | ||
2c966c03 | 2338 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
7410616c | 2339 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2340 | Unit *other; |
2341 | int r; | |
2c966c03 LP |
2342 | |
2343 | assert(u); | |
2344 | assert(name || path); | |
2345 | ||
7410616c LP |
2346 | r = resolve_template(u, name, path, &buf, &name); |
2347 | if (r < 0) | |
2348 | return r; | |
2c966c03 | 2349 | |
3f3cc397 LP |
2350 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2351 | if (r < 0) | |
68eda4bd | 2352 | return r; |
2c966c03 | 2353 | |
3f3cc397 | 2354 | return unit_add_two_dependencies(u, d, e, other, add_reference); |
2c966c03 LP |
2355 | } |
2356 | ||
701cc384 | 2357 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
7410616c | 2358 | _cleanup_free_ char *buf = NULL; |
bd77d0fc LP |
2359 | Unit *other; |
2360 | int r; | |
2361 | ||
9e2f7c11 LP |
2362 | assert(u); |
2363 | assert(name || path); | |
bd77d0fc | 2364 | |
7410616c LP |
2365 | r = resolve_template(u, name, path, &buf, &name); |
2366 | if (r < 0) | |
2367 | return r; | |
bd77d0fc | 2368 | |
3f3cc397 LP |
2369 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2370 | if (r < 0) | |
68eda4bd | 2371 | return r; |
9e2f7c11 | 2372 | |
3f3cc397 | 2373 | return unit_add_dependency(other, d, u, add_reference); |
bd77d0fc LP |
2374 | } |
2375 | ||
2c966c03 | 2376 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
7410616c | 2377 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2378 | Unit *other; |
2379 | int r; | |
2c966c03 LP |
2380 | |
2381 | assert(u); | |
2382 | assert(name || path); | |
2383 | ||
7410616c | 2384 | r = resolve_template(u, name, path, &buf, &name); |
3f3cc397 | 2385 | if (r < 0) |
68eda4bd | 2386 | return r; |
2c966c03 | 2387 | |
7410616c | 2388 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
3f3cc397 | 2389 | if (r < 0) |
68eda4bd | 2390 | return r; |
2c966c03 | 2391 | |
7410616c | 2392 | return unit_add_two_dependencies(other, d, e, u, add_reference); |
2c966c03 LP |
2393 | } |
2394 | ||
0301abf4 | 2395 | int set_unit_path(const char *p) { |
0301abf4 | 2396 | /* This is mostly for debug purposes */ |
cf7d80a5 | 2397 | if (setenv("SYSTEMD_UNIT_PATH", p, 0) < 0) |
26d04f86 | 2398 | return -errno; |
0301abf4 LP |
2399 | |
2400 | return 0; | |
2401 | } | |
88066b3a | 2402 | |
ea430986 | 2403 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2404 | assert(u); |
2405 | ||
ac155bb8 | 2406 | if (!u->id) |
04ade7d2 LP |
2407 | return NULL; |
2408 | ||
48899192 | 2409 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2410 | } |
2411 | ||
41f9172f | 2412 | char *unit_default_cgroup_path(Unit *u) { |
d7bd3de0 | 2413 | _cleanup_free_ char *escaped = NULL, *slice = NULL; |
a016b922 | 2414 | int r; |
5954c074 | 2415 | |
013b87c0 LP |
2416 | assert(u); |
2417 | ||
4ad49000 LP |
2418 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
2419 | return strdup(u->manager->cgroup_root); | |
2420 | ||
2421 | if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) { | |
a016b922 LP |
2422 | r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice); |
2423 | if (r < 0) | |
2424 | return NULL; | |
2425 | } | |
2426 | ||
d7bd3de0 LP |
2427 | escaped = cg_escape(u->id); |
2428 | if (!escaped) | |
5954c074 LP |
2429 | return NULL; |
2430 | ||
d7bd3de0 LP |
2431 | if (slice) |
2432 | return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL); | |
2433 | else | |
2434 | return strjoin(u->manager->cgroup_root, "/", escaped, NULL); | |
013b87c0 LP |
2435 | } |
2436 | ||
598459ce | 2437 | int unit_add_default_slice(Unit *u, CGroupContext *c) { |
a8833944 LP |
2438 | _cleanup_free_ char *b = NULL; |
2439 | const char *slice_name; | |
a016b922 LP |
2440 | Unit *slice; |
2441 | int r; | |
2442 | ||
2443 | assert(u); | |
598459ce | 2444 | assert(c); |
a016b922 | 2445 | |
9444b1f2 | 2446 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2447 | return 0; |
2448 | ||
a8833944 LP |
2449 | if (u->instance) { |
2450 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2451 | |
a8833944 LP |
2452 | /* Implicitly place all instantiated units in their |
2453 | * own per-template slice */ | |
2454 | ||
7410616c LP |
2455 | r = unit_name_to_prefix(u->id, &prefix); |
2456 | if (r < 0) | |
2457 | return r; | |
a8833944 LP |
2458 | |
2459 | /* The prefix is already escaped, but it might include | |
2460 | * "-" which has a special meaning for slice units, | |
2461 | * hence escape it here extra. */ | |
7410616c | 2462 | escaped = unit_name_escape(prefix); |
a8833944 LP |
2463 | if (!escaped) |
2464 | return -ENOMEM; | |
2465 | ||
b2c23da8 | 2466 | if (u->manager->running_as == MANAGER_SYSTEM) |
a8833944 LP |
2467 | b = strjoin("system-", escaped, ".slice", NULL); |
2468 | else | |
2469 | b = strappend(escaped, ".slice"); | |
2470 | if (!b) | |
2471 | return -ENOMEM; | |
2472 | ||
2473 | slice_name = b; | |
2474 | } else | |
2475 | slice_name = | |
b2c23da8 | 2476 | u->manager->running_as == MANAGER_SYSTEM |
a8833944 LP |
2477 | ? SPECIAL_SYSTEM_SLICE |
2478 | : SPECIAL_ROOT_SLICE; | |
2479 | ||
2480 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2481 | if (r < 0) |
2482 | return r; | |
2483 | ||
2484 | unit_ref_set(&u->slice, slice); | |
2485 | return 0; | |
2486 | } | |
2487 | ||
9444b1f2 LP |
2488 | const char *unit_slice_name(Unit *u) { |
2489 | assert(u); | |
2490 | ||
2491 | if (!UNIT_ISSET(u->slice)) | |
2492 | return NULL; | |
2493 | ||
2494 | return UNIT_DEREF(u->slice)->id; | |
2495 | } | |
2496 | ||
f6ff8c29 | 2497 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2498 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2499 | int r; |
2500 | ||
2501 | assert(u); | |
2502 | assert(type); | |
2503 | assert(_found); | |
2504 | ||
7410616c LP |
2505 | r = unit_name_change_suffix(u->id, type, &t); |
2506 | if (r < 0) | |
2507 | return r; | |
2508 | if (unit_has_name(u, t)) | |
2509 | return -EINVAL; | |
f6ff8c29 | 2510 | |
ac155bb8 | 2511 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2512 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2513 | return r; |
2514 | } | |
2515 | ||
05e343b7 LP |
2516 | int unit_watch_bus_name(Unit *u, const char *name) { |
2517 | assert(u); | |
2518 | assert(name); | |
2519 | ||
2520 | /* Watch a specific name on the bus. We only support one unit | |
2521 | * watching each name for now. */ | |
2522 | ||
ac155bb8 | 2523 | return hashmap_put(u->manager->watch_bus, name, u); |
05e343b7 LP |
2524 | } |
2525 | ||
2526 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2527 | assert(u); | |
2528 | assert(name); | |
2529 | ||
ac155bb8 | 2530 | hashmap_remove_value(u->manager->watch_bus, name, u); |
05e343b7 LP |
2531 | } |
2532 | ||
a16e1123 LP |
2533 | bool unit_can_serialize(Unit *u) { |
2534 | assert(u); | |
2535 | ||
2536 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2537 | } | |
2538 | ||
6b78f9b4 | 2539 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2540 | int r; |
2541 | ||
2542 | assert(u); | |
2543 | assert(f); | |
2544 | assert(fds); | |
2545 | ||
9bdb98c5 LP |
2546 | if (unit_can_serialize(u)) { |
2547 | ExecRuntime *rt; | |
a16e1123 | 2548 | |
9bdb98c5 | 2549 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
2550 | if (r < 0) |
2551 | return r; | |
9bdb98c5 LP |
2552 | |
2553 | rt = unit_get_exec_runtime(u); | |
2554 | if (rt) { | |
f2341e0a | 2555 | r = exec_runtime_serialize(u, rt, f, fds); |
9bdb98c5 LP |
2556 | if (r < 0) |
2557 | return r; | |
2558 | } | |
e0209d83 MS |
2559 | } |
2560 | ||
ac155bb8 MS |
2561 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2562 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2563 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2564 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2565 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
59fccdc5 | 2566 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 2567 | |
ac155bb8 MS |
2568 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2569 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2570 | |
59fccdc5 LP |
2571 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
2572 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
2573 | ||
c2756a68 | 2574 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
5ad096b3 | 2575 | unit_serialize_item_format(u, f, "cpuacct-usage-base", "%" PRIu64, u->cpuacct_usage_base); |
c2756a68 LP |
2576 | |
2577 | if (u->cgroup_path) | |
2578 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
2579 | ||
613b411c LP |
2580 | if (serialize_jobs) { |
2581 | if (u->job) { | |
2582 | fprintf(f, "job\n"); | |
2583 | job_serialize(u->job, f, fds); | |
2584 | } | |
2585 | ||
2586 | if (u->nop_job) { | |
2587 | fprintf(f, "job\n"); | |
2588 | job_serialize(u->nop_job, f, fds); | |
2589 | } | |
2590 | } | |
2591 | ||
a16e1123 LP |
2592 | /* End marker */ |
2593 | fputc('\n', f); | |
2594 | return 0; | |
2595 | } | |
2596 | ||
2597 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2598 | va_list ap; | |
2599 | ||
2600 | assert(u); | |
2601 | assert(f); | |
2602 | assert(key); | |
2603 | assert(format); | |
2604 | ||
2605 | fputs(key, f); | |
2606 | fputc('=', f); | |
2607 | ||
2608 | va_start(ap, format); | |
2609 | vfprintf(f, format, ap); | |
2610 | va_end(ap); | |
2611 | ||
2612 | fputc('\n', f); | |
2613 | } | |
2614 | ||
2615 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2616 | assert(u); | |
2617 | assert(f); | |
2618 | assert(key); | |
2619 | assert(value); | |
2620 | ||
2621 | fprintf(f, "%s=%s\n", key, value); | |
2622 | } | |
2623 | ||
e911de99 LP |
2624 | static int unit_set_cgroup_path(Unit *u, const char *path) { |
2625 | _cleanup_free_ char *p = NULL; | |
2626 | int r; | |
2627 | ||
2628 | assert(u); | |
2629 | ||
2630 | if (path) { | |
2631 | p = strdup(path); | |
2632 | if (!p) | |
2633 | return -ENOMEM; | |
2634 | } else | |
2635 | p = NULL; | |
2636 | ||
2637 | if (streq_ptr(u->cgroup_path, p)) | |
2638 | return 0; | |
2639 | ||
2640 | if (p) { | |
2641 | r = hashmap_put(u->manager->cgroup_unit, p, u); | |
2642 | if (r < 0) | |
2643 | return r; | |
2644 | } | |
2645 | ||
2646 | if (u->cgroup_path) { | |
f2341e0a | 2647 | log_unit_debug(u, "Changing cgroup path from %s to %s.", u->cgroup_path, strna(p)); |
e911de99 LP |
2648 | hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); |
2649 | free(u->cgroup_path); | |
2650 | } | |
2651 | ||
2652 | u->cgroup_path = p; | |
2653 | p = NULL; | |
2654 | ||
2655 | return 0; | |
2656 | } | |
2657 | ||
a16e1123 | 2658 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
28b99ccd | 2659 | ExecRuntime **rt = NULL; |
9bdb98c5 | 2660 | size_t offset; |
a16e1123 LP |
2661 | int r; |
2662 | ||
2663 | assert(u); | |
2664 | assert(f); | |
2665 | assert(fds); | |
2666 | ||
613b411c LP |
2667 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2668 | if (offset > 0) | |
2669 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
2670 | ||
a16e1123 | 2671 | for (;;) { |
20c03b7b | 2672 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2673 | size_t k; |
2674 | ||
2675 | if (!fgets(line, sizeof(line), f)) { | |
2676 | if (feof(f)) | |
2677 | return 0; | |
2678 | return -errno; | |
2679 | } | |
2680 | ||
10f8e83c | 2681 | char_array_0(line); |
a16e1123 LP |
2682 | l = strstrip(line); |
2683 | ||
2684 | /* End marker */ | |
e911de99 | 2685 | if (isempty(l)) |
a16e1123 LP |
2686 | return 0; |
2687 | ||
2688 | k = strcspn(l, "="); | |
2689 | ||
2690 | if (l[k] == '=') { | |
2691 | l[k] = 0; | |
2692 | v = l+k+1; | |
2693 | } else | |
2694 | v = l+k; | |
2695 | ||
cca098b0 | 2696 | if (streq(l, "job")) { |
39a18c60 MS |
2697 | if (v[0] == '\0') { |
2698 | /* new-style serialized job */ | |
9c3349e2 LP |
2699 | Job *j; |
2700 | ||
2701 | j = job_new_raw(u); | |
39a18c60 | 2702 | if (!j) |
e911de99 | 2703 | return log_oom(); |
39a18c60 MS |
2704 | |
2705 | r = job_deserialize(j, f, fds); | |
2706 | if (r < 0) { | |
2707 | job_free(j); | |
2708 | return r; | |
2709 | } | |
cca098b0 | 2710 | |
39a18c60 MS |
2711 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2712 | if (r < 0) { | |
2713 | job_free(j); | |
2714 | return r; | |
2715 | } | |
e0209d83 MS |
2716 | |
2717 | r = job_install_deserialized(j); | |
2718 | if (r < 0) { | |
2719 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2720 | job_free(j); | |
2721 | return r; | |
2722 | } | |
39a18c60 MS |
2723 | } else { |
2724 | /* legacy */ | |
9c3349e2 LP |
2725 | JobType type; |
2726 | ||
2727 | type = job_type_from_string(v); | |
39a18c60 | 2728 | if (type < 0) |
f2341e0a | 2729 | log_unit_debug(u, "Failed to parse job type value: %s", v); |
39a18c60 MS |
2730 | else |
2731 | u->deserialized_job = type; | |
2732 | } | |
cca098b0 | 2733 | continue; |
8aaf019b | 2734 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2735 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2736 | continue; |
2737 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2738 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2739 | continue; |
2740 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2741 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2742 | continue; |
2743 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2744 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2745 | continue; |
2791a8f8 | 2746 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2747 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 2748 | continue; |
59fccdc5 LP |
2749 | } else if (streq(l, "assert-timestamp")) { |
2750 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
2751 | continue; | |
2791a8f8 | 2752 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 2753 | |
e911de99 LP |
2754 | r = parse_boolean(v); |
2755 | if (r < 0) | |
f2341e0a | 2756 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 2757 | else |
e911de99 | 2758 | u->condition_result = r; |
efbac6d2 LP |
2759 | |
2760 | continue; | |
c2756a68 | 2761 | |
59fccdc5 | 2762 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 2763 | |
e911de99 LP |
2764 | r = parse_boolean(v); |
2765 | if (r < 0) | |
f2341e0a | 2766 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 2767 | else |
e911de99 | 2768 | u->assert_result = r; |
59fccdc5 LP |
2769 | |
2770 | continue; | |
2771 | ||
c2756a68 | 2772 | } else if (streq(l, "transient")) { |
c2756a68 | 2773 | |
e911de99 LP |
2774 | r = parse_boolean(v); |
2775 | if (r < 0) | |
f2341e0a | 2776 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 2777 | else |
e911de99 | 2778 | u->transient = r; |
c2756a68 LP |
2779 | |
2780 | continue; | |
e911de99 | 2781 | |
5ad096b3 LP |
2782 | } else if (streq(l, "cpuacct-usage-base")) { |
2783 | ||
2784 | r = safe_atou64(v, &u->cpuacct_usage_base); | |
2785 | if (r < 0) | |
f2341e0a | 2786 | log_unit_debug(u, "Failed to parse CPU usage %s, ignoring.", v); |
5ad096b3 | 2787 | |
0f908397 | 2788 | continue; |
4e595329 | 2789 | |
e911de99 | 2790 | } else if (streq(l, "cgroup")) { |
72673e86 | 2791 | |
e911de99 LP |
2792 | r = unit_set_cgroup_path(u, v); |
2793 | if (r < 0) | |
f2341e0a | 2794 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 2795 | |
c2756a68 | 2796 | continue; |
8aaf019b | 2797 | } |
cca098b0 | 2798 | |
9bdb98c5 LP |
2799 | if (unit_can_serialize(u)) { |
2800 | if (rt) { | |
f2341e0a | 2801 | r = exec_runtime_deserialize_item(u, rt, l, v, fds); |
e911de99 | 2802 | if (r < 0) { |
f2341e0a | 2803 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); |
e911de99 LP |
2804 | continue; |
2805 | } | |
2806 | ||
2807 | /* Returns positive if key was handled by the call */ | |
9bdb98c5 LP |
2808 | if (r > 0) |
2809 | continue; | |
2810 | } | |
2811 | ||
2812 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); | |
613b411c | 2813 | if (r < 0) |
f2341e0a | 2814 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 2815 | } |
a16e1123 LP |
2816 | } |
2817 | } | |
2818 | ||
6e2ef85b LP |
2819 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2820 | Unit *device; | |
68eda4bd | 2821 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
2822 | int r; |
2823 | ||
2824 | assert(u); | |
2825 | ||
6e2ef85b | 2826 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
2827 | if (isempty(what)) |
2828 | return 0; | |
6e2ef85b | 2829 | |
8407a5d0 | 2830 | if (!is_device_path(what)) |
6e2ef85b LP |
2831 | return 0; |
2832 | ||
47bc12e1 LP |
2833 | /* When device units aren't supported (such as in a |
2834 | * container), don't create dependencies on them. */ | |
1c2e9646 | 2835 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
2836 | return 0; |
2837 | ||
7410616c LP |
2838 | r = unit_name_from_path(what, ".device", &e); |
2839 | if (r < 0) | |
2840 | return r; | |
6e2ef85b | 2841 | |
ac155bb8 | 2842 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
2843 | if (r < 0) |
2844 | return r; | |
2845 | ||
b2c23da8 | 2846 | r = unit_add_two_dependencies(u, UNIT_AFTER, u->manager->running_as == MANAGER_SYSTEM ? UNIT_BINDS_TO : UNIT_WANTS, device, true); |
faa368e3 | 2847 | if (r < 0) |
6e2ef85b LP |
2848 | return r; |
2849 | ||
faa368e3 LP |
2850 | if (wants) { |
2851 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2852 | if (r < 0) | |
6e2ef85b | 2853 | return r; |
faa368e3 | 2854 | } |
6e2ef85b LP |
2855 | |
2856 | return 0; | |
2857 | } | |
a16e1123 | 2858 | |
be847e82 | 2859 | int unit_coldplug(Unit *u) { |
cca098b0 LP |
2860 | int r; |
2861 | ||
2862 | assert(u); | |
2863 | ||
f78f265f LP |
2864 | /* Make sure we don't enter a loop, when coldplugging |
2865 | * recursively. */ | |
2866 | if (u->coldplugged) | |
2867 | return 0; | |
2868 | ||
2869 | u->coldplugged = true; | |
2870 | ||
f78f265f LP |
2871 | if (UNIT_VTABLE(u)->coldplug) { |
2872 | r = UNIT_VTABLE(u)->coldplug(u); | |
2873 | if (r < 0) | |
2874 | return r; | |
2875 | } | |
cca098b0 | 2876 | |
39a18c60 MS |
2877 | if (u->job) { |
2878 | r = job_coldplug(u->job); | |
2879 | if (r < 0) | |
2880 | return r; | |
be847e82 | 2881 | } else if (u->deserialized_job >= 0) { |
39a18c60 | 2882 | /* legacy */ |
be847e82 LP |
2883 | r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL); |
2884 | if (r < 0) | |
2885 | return r; | |
2886 | ||
2887 | u->deserialized_job = _JOB_TYPE_INVALID; | |
2888 | } | |
cca098b0 LP |
2889 | |
2890 | return 0; | |
2891 | } | |
2892 | ||
49b1d377 | 2893 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
bcfce235 | 2894 | DISABLE_WARNING_FORMAT_NONLITERAL; |
127d5fd1 ZJS |
2895 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, |
2896 | status, unit_status_msg_format, unit_description(u)); | |
bcfce235 | 2897 | REENABLE_WARNING; |
49b1d377 MS |
2898 | } |
2899 | ||
45fb0699 | 2900 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
2901 | _cleanup_strv_free_ char **t = NULL; |
2902 | char **path; | |
1b64d026 | 2903 | struct stat st; |
ae7a7182 | 2904 | unsigned loaded_cnt, current_cnt; |
1b64d026 | 2905 | |
45fb0699 LP |
2906 | assert(u); |
2907 | ||
ac155bb8 | 2908 | if (u->fragment_path) { |
5f4b19f4 | 2909 | zero(st); |
ac155bb8 | 2910 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2911 | /* What, cannot access this anymore? */ |
2912 | return true; | |
45fb0699 | 2913 | |
ac155bb8 MS |
2914 | if (u->fragment_mtime > 0 && |
2915 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2916 | return true; |
2917 | } | |
2918 | ||
1b64d026 LP |
2919 | if (u->source_path) { |
2920 | zero(st); | |
2921 | if (stat(u->source_path, &st) < 0) | |
2922 | return true; | |
2923 | ||
2924 | if (u->source_mtime > 0 && | |
2925 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2926 | return true; | |
2927 | } | |
5f4b19f4 | 2928 | |
1a7f1b38 | 2929 | (void) unit_find_dropin_paths(u, &t); |
ae7a7182 OS |
2930 | loaded_cnt = strv_length(t); |
2931 | current_cnt = strv_length(u->dropin_paths); | |
2932 | ||
2933 | if (loaded_cnt == current_cnt) { | |
2934 | if (loaded_cnt == 0) | |
2935 | return false; | |
2936 | ||
2937 | if (strv_overlap(u->dropin_paths, t)) { | |
2938 | STRV_FOREACH(path, u->dropin_paths) { | |
2939 | zero(st); | |
2940 | if (stat(*path, &st) < 0) | |
2941 | return true; | |
2942 | ||
2943 | if (u->dropin_mtime > 0 && | |
2944 | timespec_load(&st.st_mtim) > u->dropin_mtime) | |
2945 | return true; | |
2946 | } | |
2947 | ||
2948 | return false; | |
2949 | } else | |
2950 | return true; | |
2951 | } else | |
2952 | return true; | |
45fb0699 LP |
2953 | } |
2954 | ||
fdf20a31 | 2955 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2956 | assert(u); |
2957 | ||
fdf20a31 MM |
2958 | if (UNIT_VTABLE(u)->reset_failed) |
2959 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2960 | } |
2961 | ||
a7f241db LP |
2962 | Unit *unit_following(Unit *u) { |
2963 | assert(u); | |
2964 | ||
2965 | if (UNIT_VTABLE(u)->following) | |
2966 | return UNIT_VTABLE(u)->following(u); | |
2967 | ||
2968 | return NULL; | |
2969 | } | |
2970 | ||
31afa0a4 | 2971 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
2972 | assert(u); |
2973 | ||
31afa0a4 LP |
2974 | /* This call does check the current state of the unit. It's |
2975 | * hence useful to be called from state change calls of the | |
2976 | * unit itself, where the state isn't updated yet. This is | |
2977 | * different from unit_inactive_or_pending() which checks both | |
2978 | * the current state and for a queued job. */ | |
18ffdfda | 2979 | |
31afa0a4 LP |
2980 | return u->job && u->job->type == JOB_STOP; |
2981 | } | |
2982 | ||
2983 | bool unit_inactive_or_pending(Unit *u) { | |
2984 | assert(u); | |
2985 | ||
2986 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 2987 | |
d956ac29 LP |
2988 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
2989 | return true; | |
2990 | ||
31afa0a4 | 2991 | if (unit_stop_pending(u)) |
18ffdfda LP |
2992 | return true; |
2993 | ||
2994 | return false; | |
2995 | } | |
2996 | ||
31afa0a4 | 2997 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
2998 | assert(u); |
2999 | ||
f60c2665 | 3000 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3001 | |
3002 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3003 | return true; | |
3004 | ||
ac155bb8 MS |
3005 | if (u->job && |
3006 | (u->job->type == JOB_START || | |
3007 | u->job->type == JOB_RELOAD_OR_START || | |
3008 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
3009 | return true; |
3010 | ||
3011 | return false; | |
3012 | } | |
3013 | ||
718db961 | 3014 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3015 | assert(u); |
3016 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
3017 | assert(signo > 0); |
3018 | assert(signo < _NSIG); | |
3019 | ||
8a0867d6 | 3020 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3021 | return -EOPNOTSUPP; |
8a0867d6 | 3022 | |
c74f17d9 | 3023 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3024 | } |
3025 | ||
82659fd7 LP |
3026 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
3027 | Set *pid_set; | |
3028 | int r; | |
3029 | ||
d5099efc | 3030 | pid_set = set_new(NULL); |
82659fd7 LP |
3031 | if (!pid_set) |
3032 | return NULL; | |
3033 | ||
3034 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3035 | if (main_pid > 0) { | |
3036 | r = set_put(pid_set, LONG_TO_PTR(main_pid)); | |
3037 | if (r < 0) | |
3038 | goto fail; | |
3039 | } | |
3040 | ||
3041 | if (control_pid > 0) { | |
3042 | r = set_put(pid_set, LONG_TO_PTR(control_pid)); | |
3043 | if (r < 0) | |
3044 | goto fail; | |
3045 | } | |
3046 | ||
3047 | return pid_set; | |
3048 | ||
3049 | fail: | |
3050 | set_free(pid_set); | |
3051 | return NULL; | |
3052 | } | |
3053 | ||
d91c34f2 LP |
3054 | int unit_kill_common( |
3055 | Unit *u, | |
3056 | KillWho who, | |
3057 | int signo, | |
3058 | pid_t main_pid, | |
3059 | pid_t control_pid, | |
718db961 | 3060 | sd_bus_error *error) { |
d91c34f2 | 3061 | |
814cc562 MS |
3062 | int r = 0; |
3063 | ||
3064 | if (who == KILL_MAIN && main_pid <= 0) { | |
3065 | if (main_pid < 0) | |
7358dc02 | 3066 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
814cc562 | 3067 | else |
7358dc02 | 3068 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3069 | } |
3070 | ||
3071 | if (who == KILL_CONTROL && control_pid <= 0) { | |
3072 | if (control_pid < 0) | |
7358dc02 | 3073 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
814cc562 | 3074 | else |
7358dc02 | 3075 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3076 | } |
3077 | ||
3078 | if (who == KILL_CONTROL || who == KILL_ALL) | |
3079 | if (control_pid > 0) | |
3080 | if (kill(control_pid, signo) < 0) | |
3081 | r = -errno; | |
3082 | ||
3083 | if (who == KILL_MAIN || who == KILL_ALL) | |
3084 | if (main_pid > 0) | |
3085 | if (kill(main_pid, signo) < 0) | |
3086 | r = -errno; | |
3087 | ||
4ad49000 | 3088 | if (who == KILL_ALL && u->cgroup_path) { |
814cc562 MS |
3089 | _cleanup_set_free_ Set *pid_set = NULL; |
3090 | int q; | |
3091 | ||
82659fd7 LP |
3092 | /* Exclude the main/control pids from being killed via the cgroup */ |
3093 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3094 | if (!pid_set) |
3095 | return -ENOMEM; | |
3096 | ||
4ad49000 | 3097 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set); |
814cc562 MS |
3098 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
3099 | r = q; | |
3100 | } | |
3101 | ||
3102 | return r; | |
3103 | } | |
3104 | ||
6210e7fc LP |
3105 | int unit_following_set(Unit *u, Set **s) { |
3106 | assert(u); | |
3107 | assert(s); | |
3108 | ||
3109 | if (UNIT_VTABLE(u)->following_set) | |
3110 | return UNIT_VTABLE(u)->following_set(u, s); | |
3111 | ||
3112 | *s = NULL; | |
3113 | return 0; | |
3114 | } | |
3115 | ||
a4375746 LP |
3116 | UnitFileState unit_get_unit_file_state(Unit *u) { |
3117 | assert(u); | |
3118 | ||
ac155bb8 MS |
3119 | if (u->unit_file_state < 0 && u->fragment_path) |
3120 | u->unit_file_state = unit_file_get_state( | |
b2c23da8 | 3121 | u->manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
2b6bf07d | 3122 | NULL, basename(u->fragment_path)); |
a4375746 | 3123 | |
ac155bb8 | 3124 | return u->unit_file_state; |
a4375746 LP |
3125 | } |
3126 | ||
d2dc52db LP |
3127 | int unit_get_unit_file_preset(Unit *u) { |
3128 | assert(u); | |
3129 | ||
3130 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3131 | u->unit_file_preset = unit_file_query_preset( | |
b2c23da8 | 3132 | u->manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
d2dc52db LP |
3133 | NULL, basename(u->fragment_path)); |
3134 | ||
3135 | return u->unit_file_preset; | |
3136 | } | |
3137 | ||
57020a3a LP |
3138 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
3139 | assert(ref); | |
3140 | assert(u); | |
3141 | ||
3142 | if (ref->unit) | |
3143 | unit_ref_unset(ref); | |
3144 | ||
3145 | ref->unit = u; | |
71fda00f | 3146 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
3147 | return u; |
3148 | } | |
3149 | ||
3150 | void unit_ref_unset(UnitRef *ref) { | |
3151 | assert(ref); | |
3152 | ||
3153 | if (!ref->unit) | |
3154 | return; | |
3155 | ||
71fda00f | 3156 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
3157 | ref->unit = NULL; |
3158 | } | |
3159 | ||
598459ce LP |
3160 | int unit_patch_contexts(Unit *u) { |
3161 | CGroupContext *cc; | |
3162 | ExecContext *ec; | |
cba6e062 LP |
3163 | unsigned i; |
3164 | int r; | |
3165 | ||
e06c73cc | 3166 | assert(u); |
e06c73cc | 3167 | |
598459ce LP |
3168 | /* Patch in the manager defaults into the exec and cgroup |
3169 | * contexts, _after_ the rest of the settings have been | |
3170 | * initialized */ | |
085afe36 | 3171 | |
598459ce LP |
3172 | ec = unit_get_exec_context(u); |
3173 | if (ec) { | |
3174 | /* This only copies in the ones that need memory */ | |
3175 | for (i = 0; i < _RLIMIT_MAX; i++) | |
3176 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
3177 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
3178 | if (!ec->rlimit[i]) | |
3179 | return -ENOMEM; | |
3180 | } | |
3181 | ||
b2c23da8 | 3182 | if (u->manager->running_as == MANAGER_USER && |
598459ce LP |
3183 | !ec->working_directory) { |
3184 | ||
3185 | r = get_home_dir(&ec->working_directory); | |
3186 | if (r < 0) | |
3187 | return r; | |
4c08c824 LP |
3188 | |
3189 | /* Allow user services to run, even if the | |
3190 | * home directory is missing */ | |
3191 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
3192 | } |
3193 | ||
b2c23da8 | 3194 | if (u->manager->running_as == MANAGER_USER && |
598459ce LP |
3195 | (ec->syscall_whitelist || |
3196 | !set_isempty(ec->syscall_filter) || | |
3197 | !set_isempty(ec->syscall_archs) || | |
3198 | ec->address_families_whitelist || | |
3199 | !set_isempty(ec->address_families))) | |
3200 | ec->no_new_privileges = true; | |
e06c73cc | 3201 | |
598459ce LP |
3202 | if (ec->private_devices) |
3203 | ec->capability_bounding_set_drop |= (uint64_t) 1ULL << (uint64_t) CAP_MKNOD; | |
cba6e062 LP |
3204 | } |
3205 | ||
598459ce LP |
3206 | cc = unit_get_cgroup_context(u); |
3207 | if (cc) { | |
f513e420 | 3208 | |
598459ce LP |
3209 | if (ec && |
3210 | ec->private_devices && | |
3211 | cc->device_policy == CGROUP_AUTO) | |
3212 | cc->device_policy = CGROUP_CLOSED; | |
3213 | } | |
f1660f96 | 3214 | |
cba6e062 | 3215 | return 0; |
e06c73cc LP |
3216 | } |
3217 | ||
3ef63c31 LP |
3218 | ExecContext *unit_get_exec_context(Unit *u) { |
3219 | size_t offset; | |
3220 | assert(u); | |
3221 | ||
598459ce LP |
3222 | if (u->type < 0) |
3223 | return NULL; | |
3224 | ||
3ef63c31 LP |
3225 | offset = UNIT_VTABLE(u)->exec_context_offset; |
3226 | if (offset <= 0) | |
3227 | return NULL; | |
3228 | ||
3229 | return (ExecContext*) ((uint8_t*) u + offset); | |
3230 | } | |
3231 | ||
718db961 LP |
3232 | KillContext *unit_get_kill_context(Unit *u) { |
3233 | size_t offset; | |
3234 | assert(u); | |
3235 | ||
598459ce LP |
3236 | if (u->type < 0) |
3237 | return NULL; | |
3238 | ||
718db961 LP |
3239 | offset = UNIT_VTABLE(u)->kill_context_offset; |
3240 | if (offset <= 0) | |
3241 | return NULL; | |
3242 | ||
3243 | return (KillContext*) ((uint8_t*) u + offset); | |
3244 | } | |
3245 | ||
4ad49000 LP |
3246 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
3247 | size_t offset; | |
3248 | ||
598459ce LP |
3249 | if (u->type < 0) |
3250 | return NULL; | |
3251 | ||
4ad49000 LP |
3252 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
3253 | if (offset <= 0) | |
3254 | return NULL; | |
3255 | ||
3256 | return (CGroupContext*) ((uint8_t*) u + offset); | |
3257 | } | |
3258 | ||
613b411c LP |
3259 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
3260 | size_t offset; | |
3261 | ||
598459ce LP |
3262 | if (u->type < 0) |
3263 | return NULL; | |
3264 | ||
613b411c LP |
3265 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
3266 | if (offset <= 0) | |
3267 | return NULL; | |
3268 | ||
3269 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
3270 | } | |
3271 | ||
29686440 | 3272 | static int unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode, bool transient, char **dir) { |
b2c23da8 | 3273 | if (u->manager->running_as == MANAGER_USER) { |
29686440 | 3274 | int r; |
26d04f86 | 3275 | |
718880ba SA |
3276 | if (mode == UNIT_PERSISTENT && !transient) |
3277 | r = user_config_home(dir); | |
3278 | else | |
4d5dec23 | 3279 | r = user_runtime_dir(dir); |
718880ba | 3280 | |
26d04f86 LP |
3281 | if (r == 0) |
3282 | return -ENOENT; | |
29686440 ZJS |
3283 | return r; |
3284 | } | |
26d04f86 | 3285 | |
29686440 ZJS |
3286 | if (mode == UNIT_PERSISTENT && !transient) |
3287 | *dir = strdup("/etc/systemd/system"); | |
8e2af478 | 3288 | else |
29686440 ZJS |
3289 | *dir = strdup("/run/systemd/system"); |
3290 | if (!*dir) | |
71645aca LP |
3291 | return -ENOMEM; |
3292 | ||
26d04f86 | 3293 | return 0; |
71645aca LP |
3294 | } |
3295 | ||
29686440 ZJS |
3296 | static int unit_drop_in_file(Unit *u, |
3297 | UnitSetPropertiesMode mode, const char *name, char **p, char **q) { | |
3298 | _cleanup_free_ char *dir = NULL; | |
3299 | int r; | |
3300 | ||
3301 | assert(u); | |
3302 | ||
3303 | r = unit_drop_in_dir(u, mode, u->transient, &dir); | |
3304 | if (r < 0) | |
3305 | return r; | |
3306 | ||
8eea8687 | 3307 | return drop_in_file(dir, u->id, 50, name, p, q); |
29686440 ZJS |
3308 | } |
3309 | ||
8e2af478 | 3310 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
29686440 | 3311 | |
adb76a70 | 3312 | _cleanup_free_ char *dir = NULL, *p = NULL, *q = NULL; |
26d04f86 | 3313 | int r; |
71645aca LP |
3314 | |
3315 | assert(u); | |
3316 | ||
6d235724 | 3317 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3318 | return 0; |
3319 | ||
29686440 | 3320 | r = unit_drop_in_dir(u, mode, u->transient, &dir); |
26d04f86 LP |
3321 | if (r < 0) |
3322 | return r; | |
71645aca | 3323 | |
adb76a70 WC |
3324 | r = write_drop_in(dir, u->id, 50, name, data); |
3325 | if (r < 0) | |
3326 | return r; | |
3327 | ||
3328 | r = drop_in_file(dir, u->id, 50, name, &p, &q); | |
3329 | if (r < 0) | |
3330 | return r; | |
3331 | ||
3332 | r = strv_extend(&u->dropin_paths, q); | |
3333 | if (r < 0) | |
3334 | return r; | |
3335 | ||
3336 | strv_sort(u->dropin_paths); | |
3337 | strv_uniq(u->dropin_paths); | |
3338 | ||
3339 | u->dropin_mtime = now(CLOCK_REALTIME); | |
3340 | ||
3341 | return 0; | |
26d04f86 | 3342 | } |
71645aca | 3343 | |
b9ec9359 LP |
3344 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3345 | _cleanup_free_ char *p = NULL; | |
3346 | va_list ap; | |
3347 | int r; | |
3348 | ||
3349 | assert(u); | |
3350 | assert(name); | |
3351 | assert(format); | |
3352 | ||
6d235724 | 3353 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3354 | return 0; |
3355 | ||
3356 | va_start(ap, format); | |
3357 | r = vasprintf(&p, format, ap); | |
3358 | va_end(ap); | |
3359 | ||
3360 | if (r < 0) | |
3361 | return -ENOMEM; | |
3362 | ||
3363 | return unit_write_drop_in(u, mode, name, p); | |
3364 | } | |
3365 | ||
3366 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
b42defe3 LP |
3367 | _cleanup_free_ char *ndata = NULL; |
3368 | ||
3369 | assert(u); | |
3370 | assert(name); | |
3371 | assert(data); | |
3372 | ||
3373 | if (!UNIT_VTABLE(u)->private_section) | |
3374 | return -EINVAL; | |
3375 | ||
6d235724 | 3376 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3377 | return 0; |
3378 | ||
b42defe3 LP |
3379 | ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL); |
3380 | if (!ndata) | |
3381 | return -ENOMEM; | |
3382 | ||
3383 | return unit_write_drop_in(u, mode, name, ndata); | |
3384 | } | |
3385 | ||
b9ec9359 LP |
3386 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3387 | _cleanup_free_ char *p = NULL; | |
3388 | va_list ap; | |
3389 | int r; | |
3390 | ||
3391 | assert(u); | |
3392 | assert(name); | |
3393 | assert(format); | |
3394 | ||
6d235724 | 3395 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3396 | return 0; |
3397 | ||
3398 | va_start(ap, format); | |
3399 | r = vasprintf(&p, format, ap); | |
3400 | va_end(ap); | |
3401 | ||
3402 | if (r < 0) | |
3403 | return -ENOMEM; | |
3404 | ||
3405 | return unit_write_drop_in_private(u, mode, name, p); | |
3406 | } | |
3407 | ||
8e2af478 | 3408 | int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) { |
26d04f86 LP |
3409 | _cleanup_free_ char *p = NULL, *q = NULL; |
3410 | int r; | |
71645aca | 3411 | |
26d04f86 | 3412 | assert(u); |
71645aca | 3413 | |
6d235724 | 3414 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3415 | return 0; |
3416 | ||
29686440 | 3417 | r = unit_drop_in_file(u, mode, name, &p, &q); |
6891529f ZJS |
3418 | if (r < 0) |
3419 | return r; | |
3420 | ||
71645aca | 3421 | if (unlink(q) < 0) |
241da328 | 3422 | r = errno == ENOENT ? 0 : -errno; |
26d04f86 | 3423 | else |
241da328 | 3424 | r = 1; |
71645aca LP |
3425 | |
3426 | rmdir(p); | |
26d04f86 | 3427 | return r; |
71645aca LP |
3428 | } |
3429 | ||
c2756a68 LP |
3430 | int unit_make_transient(Unit *u) { |
3431 | int r; | |
3432 | ||
3433 | assert(u); | |
3434 | ||
3435 | u->load_state = UNIT_STUB; | |
3436 | u->load_error = 0; | |
3437 | u->transient = true; | |
3438 | ||
3439 | free(u->fragment_path); | |
3440 | u->fragment_path = NULL; | |
3441 | ||
b2c23da8 | 3442 | if (u->manager->running_as == MANAGER_USER) { |
c2756a68 LP |
3443 | _cleanup_free_ char *c = NULL; |
3444 | ||
4d5dec23 | 3445 | r = user_runtime_dir(&c); |
c2756a68 LP |
3446 | if (r < 0) |
3447 | return r; | |
3448 | if (r == 0) | |
3449 | return -ENOENT; | |
3450 | ||
3451 | u->fragment_path = strjoin(c, "/", u->id, NULL); | |
3452 | if (!u->fragment_path) | |
3453 | return -ENOMEM; | |
3454 | ||
3455 | mkdir_p(c, 0755); | |
3456 | } else { | |
3457 | u->fragment_path = strappend("/run/systemd/system/", u->id); | |
3458 | if (!u->fragment_path) | |
3459 | return -ENOMEM; | |
3460 | ||
3461 | mkdir_p("/run/systemd/system", 0755); | |
3462 | } | |
3463 | ||
3464 | return write_string_file_atomic_label(u->fragment_path, "# Transient stub"); | |
3465 | } | |
3466 | ||
cd2086fe LP |
3467 | int unit_kill_context( |
3468 | Unit *u, | |
3469 | KillContext *c, | |
db2cb23b | 3470 | KillOperation k, |
cd2086fe LP |
3471 | pid_t main_pid, |
3472 | pid_t control_pid, | |
3473 | bool main_pid_alien) { | |
3474 | ||
bc6aed7b | 3475 | int sig, wait_for_exit = false, r; |
cd2086fe LP |
3476 | |
3477 | assert(u); | |
3478 | assert(c); | |
3479 | ||
3480 | if (c->kill_mode == KILL_NONE) | |
3481 | return 0; | |
3482 | ||
db2cb23b UTL |
3483 | switch (k) { |
3484 | case KILL_KILL: | |
3485 | sig = SIGKILL; | |
3486 | break; | |
3487 | case KILL_ABORT: | |
3488 | sig = SIGABRT; | |
3489 | break; | |
3490 | case KILL_TERMINATE: | |
3491 | sig = c->kill_signal; | |
3492 | break; | |
3493 | default: | |
3494 | assert_not_reached("KillOperation unknown"); | |
3495 | } | |
cd2086fe LP |
3496 | |
3497 | if (main_pid > 0) { | |
3498 | r = kill_and_sigcont(main_pid, sig); | |
3499 | ||
3500 | if (r < 0 && r != -ESRCH) { | |
3501 | _cleanup_free_ char *comm = NULL; | |
3502 | get_process_comm(main_pid, &comm); | |
3503 | ||
f2341e0a | 3504 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s): %m", main_pid, strna(comm)); |
82659fd7 | 3505 | } else { |
bc6aed7b LP |
3506 | if (!main_pid_alien) |
3507 | wait_for_exit = true; | |
82659fd7 | 3508 | |
db2cb23b | 3509 | if (c->send_sighup && k != KILL_KILL) |
82659fd7 LP |
3510 | kill(main_pid, SIGHUP); |
3511 | } | |
cd2086fe LP |
3512 | } |
3513 | ||
3514 | if (control_pid > 0) { | |
3515 | r = kill_and_sigcont(control_pid, sig); | |
3516 | ||
3517 | if (r < 0 && r != -ESRCH) { | |
3518 | _cleanup_free_ char *comm = NULL; | |
3519 | get_process_comm(control_pid, &comm); | |
3520 | ||
f2341e0a | 3521 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s): %m", control_pid, strna(comm)); |
82659fd7 | 3522 | } else { |
cd2086fe | 3523 | wait_for_exit = true; |
82659fd7 | 3524 | |
db2cb23b | 3525 | if (c->send_sighup && k != KILL_KILL) |
82659fd7 LP |
3526 | kill(control_pid, SIGHUP); |
3527 | } | |
cd2086fe LP |
3528 | } |
3529 | ||
db2cb23b | 3530 | if ((c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL)) && u->cgroup_path) { |
cd2086fe LP |
3531 | _cleanup_set_free_ Set *pid_set = NULL; |
3532 | ||
82659fd7 LP |
3533 | /* Exclude the main/control pids from being killed via the cgroup */ |
3534 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
3535 | if (!pid_set) |
3536 | return -ENOMEM; | |
3537 | ||
4ad49000 | 3538 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, true, false, pid_set); |
cd2086fe LP |
3539 | if (r < 0) { |
3540 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
f2341e0a | 3541 | log_unit_warning_errno(u, r, "Failed to kill control group: %m"); |
82659fd7 | 3542 | } else if (r > 0) { |
bc6aed7b | 3543 | |
743970d2 LP |
3544 | /* FIXME: For now, we will not wait for the |
3545 | * cgroup members to die, simply because | |
3546 | * cgroup notification is unreliable. It | |
3547 | * doesn't work at all in containers, and | |
3548 | * outside of containers it can be confused | |
3549 | * easily by leaving directories in the | |
3550 | * cgroup. */ | |
3551 | ||
3552 | /* wait_for_exit = true; */ | |
58ea275a | 3553 | |
db2cb23b | 3554 | if (c->send_sighup && k != KILL_KILL) { |
82659fd7 LP |
3555 | set_free(pid_set); |
3556 | ||
3557 | pid_set = unit_pid_set(main_pid, control_pid); | |
3558 | if (!pid_set) | |
3559 | return -ENOMEM; | |
3560 | ||
8190da36 | 3561 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, false, true, false, pid_set); |
82659fd7 LP |
3562 | } |
3563 | } | |
cd2086fe LP |
3564 | } |
3565 | ||
3566 | return wait_for_exit; | |
3567 | } | |
3568 | ||
a57f7e2c LP |
3569 | int unit_require_mounts_for(Unit *u, const char *path) { |
3570 | char prefix[strlen(path) + 1], *p; | |
3571 | int r; | |
3572 | ||
3573 | assert(u); | |
3574 | assert(path); | |
3575 | ||
3576 | /* Registers a unit for requiring a certain path and all its | |
3577 | * prefixes. We keep a simple array of these paths in the | |
3578 | * unit, since its usually short. However, we build a prefix | |
3579 | * table for all possible prefixes so that new appearing mount | |
3580 | * units can easily determine which units to make themselves a | |
3581 | * dependency of. */ | |
3582 | ||
70b64bd3 ZJS |
3583 | if (!path_is_absolute(path)) |
3584 | return -EINVAL; | |
3585 | ||
a57f7e2c LP |
3586 | p = strdup(path); |
3587 | if (!p) | |
3588 | return -ENOMEM; | |
3589 | ||
3590 | path_kill_slashes(p); | |
3591 | ||
a57f7e2c LP |
3592 | if (!path_is_safe(p)) { |
3593 | free(p); | |
3594 | return -EPERM; | |
3595 | } | |
3596 | ||
3597 | if (strv_contains(u->requires_mounts_for, p)) { | |
3598 | free(p); | |
3599 | return 0; | |
3600 | } | |
3601 | ||
6e18964d ZJS |
3602 | r = strv_consume(&u->requires_mounts_for, p); |
3603 | if (r < 0) | |
a57f7e2c | 3604 | return r; |
a57f7e2c LP |
3605 | |
3606 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
3607 | Set *x; | |
3608 | ||
3609 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
3610 | if (!x) { | |
3611 | char *q; | |
3612 | ||
742f41ad LP |
3613 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &string_hash_ops); |
3614 | if (r < 0) | |
3615 | return r; | |
a57f7e2c LP |
3616 | |
3617 | q = strdup(prefix); | |
3618 | if (!q) | |
3619 | return -ENOMEM; | |
3620 | ||
d5099efc | 3621 | x = set_new(NULL); |
a57f7e2c LP |
3622 | if (!x) { |
3623 | free(q); | |
3624 | return -ENOMEM; | |
3625 | } | |
3626 | ||
3627 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
3628 | if (r < 0) { | |
3629 | free(q); | |
3630 | set_free(x); | |
3631 | return r; | |
3632 | } | |
3633 | } | |
3634 | ||
3635 | r = set_put(x, u); | |
3636 | if (r < 0) | |
3637 | return r; | |
3638 | } | |
3639 | ||
3640 | return 0; | |
3641 | } | |
3642 | ||
613b411c LP |
3643 | int unit_setup_exec_runtime(Unit *u) { |
3644 | ExecRuntime **rt; | |
3645 | size_t offset; | |
3646 | Iterator i; | |
3647 | Unit *other; | |
3648 | ||
3649 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3650 | assert(offset > 0); | |
3651 | ||
06b643e7 | 3652 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
3653 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
3654 | if (*rt) | |
3655 | return 0; | |
3656 | ||
3657 | /* Try to get it from somebody else */ | |
3658 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
3659 | ||
3660 | *rt = unit_get_exec_runtime(other); | |
3661 | if (*rt) { | |
3662 | exec_runtime_ref(*rt); | |
3663 | return 0; | |
3664 | } | |
3665 | } | |
3666 | ||
3667 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
3668 | } | |
3669 | ||
1c2e9646 LP |
3670 | bool unit_type_supported(UnitType t) { |
3671 | if (_unlikely_(t < 0)) | |
3672 | return false; | |
3673 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
3674 | return false; | |
3675 | ||
3676 | if (!unit_vtable[t]->supported) | |
3677 | return true; | |
3678 | ||
3679 | return unit_vtable[t]->supported(); | |
3680 | } | |
3681 | ||
8b4305c7 LP |
3682 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
3683 | int r; | |
3684 | ||
3685 | assert(u); | |
3686 | assert(where); | |
3687 | ||
3688 | r = dir_is_empty(where); | |
3689 | if (r > 0) | |
3690 | return; | |
3691 | if (r < 0) { | |
3692 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
3693 | return; | |
3694 | } | |
3695 | ||
3696 | log_struct(LOG_NOTICE, | |
3697 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3698 | LOG_UNIT_ID(u), | |
3699 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
3700 | "WHERE=%s", where, | |
3701 | NULL); | |
3702 | } | |
3703 | ||
3704 | int unit_fail_if_symlink(Unit *u, const char* where) { | |
3705 | int r; | |
3706 | ||
3707 | assert(u); | |
3708 | assert(where); | |
3709 | ||
3710 | r = is_symlink(where); | |
3711 | if (r < 0) { | |
3712 | log_unit_debug_errno(u, r, "Failed to check symlink %s, ignoring: %m", where); | |
3713 | return 0; | |
3714 | } | |
3715 | if (r == 0) | |
3716 | return 0; | |
3717 | ||
3718 | log_struct(LOG_ERR, | |
3719 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3720 | LOG_UNIT_ID(u), | |
3721 | LOG_UNIT_MESSAGE(u, "Mount on symlink %s not allowed.", where), | |
3722 | "WHERE=%s", where, | |
3723 | NULL); | |
3724 | ||
3725 | return -ELOOP; | |
3726 | } | |
3727 | ||
94f04347 LP |
3728 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
3729 | [UNIT_ACTIVE] = "active", | |
032ff4af | 3730 | [UNIT_RELOADING] = "reloading", |
94f04347 | 3731 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 3732 | [UNIT_FAILED] = "failed", |
94f04347 LP |
3733 | [UNIT_ACTIVATING] = "activating", |
3734 | [UNIT_DEACTIVATING] = "deactivating" | |
3735 | }; | |
3736 | ||
3737 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); |