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Commit | Line | Data |
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a7334b09 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2010 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
7 | under the terms of the GNU Lesser General Public License as published by |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
9 | (at your option) any later version. |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 14 | Lesser General Public License for more details. |
a7334b09 | 15 | |
5430f7f2 | 16 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
18 | ***/ | |
19 | ||
87f0e418 | 20 | #include <errno.h> |
0301abf4 | 21 | #include <stdlib.h> |
4f5dd394 | 22 | #include <string.h> |
45fb0699 | 23 | #include <sys/stat.h> |
4f5dd394 | 24 | #include <unistd.h> |
87f0e418 | 25 | |
718db961 LP |
26 | #include "sd-id128.h" |
27 | #include "sd-messages.h" | |
4f5dd394 | 28 | |
b5efdb8a | 29 | #include "alloc-util.h" |
4f5dd394 LP |
30 | #include "bus-common-errors.h" |
31 | #include "bus-util.h" | |
c6c18be3 | 32 | #include "cgroup-util.h" |
4f5dd394 LP |
33 | #include "dbus-unit.h" |
34 | #include "dbus.h" | |
35 | #include "dropin.h" | |
36 | #include "escape.h" | |
37 | #include "execute.h" | |
a5c32cff | 38 | #include "fileio-label.h" |
6482f626 | 39 | #include "formats-util.h" |
4f5dd394 LP |
40 | #include "load-dropin.h" |
41 | #include "load-fragment.h" | |
42 | #include "log.h" | |
43 | #include "macro.h" | |
44 | #include "missing.h" | |
45 | #include "mkdir.h" | |
6bedfcbb | 46 | #include "parse-util.h" |
4f5dd394 | 47 | #include "path-util.h" |
0b452006 | 48 | #include "process-util.h" |
4f5dd394 | 49 | #include "set.h" |
6eb7c172 | 50 | #include "signal-util.h" |
e9db43d5 | 51 | #include "special.h" |
8fcde012 | 52 | #include "stat-util.h" |
d054f0a4 | 53 | #include "stdio-util.h" |
07630cea | 54 | #include "string-util.h" |
4f5dd394 | 55 | #include "strv.h" |
4f4afc88 | 56 | #include "umask-util.h" |
4f5dd394 | 57 | #include "unit-name.h" |
e9db43d5 | 58 | #include "unit.h" |
b1d4f8e1 LP |
59 | #include "user-util.h" |
60 | #include "virt.h" | |
87f0e418 LP |
61 | |
62 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
63 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 | 64 | [UNIT_SOCKET] = &socket_vtable, |
e821075a | 65 | [UNIT_BUSNAME] = &busname_vtable, |
87f0e418 LP |
66 | [UNIT_TARGET] = &target_vtable, |
67 | [UNIT_DEVICE] = &device_vtable, | |
68 | [UNIT_MOUNT] = &mount_vtable, | |
69 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 70 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 71 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 72 | [UNIT_PATH] = &path_vtable, |
6c12b52e LP |
73 | [UNIT_SLICE] = &slice_vtable, |
74 | [UNIT_SCOPE] = &scope_vtable | |
87f0e418 LP |
75 | }; |
76 | ||
f2341e0a | 77 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 78 | |
7d17cfbc | 79 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
80 | Unit *u; |
81 | ||
82 | assert(m); | |
ac155bb8 | 83 | assert(size >= sizeof(Unit)); |
87f0e418 | 84 | |
7d17cfbc MS |
85 | u = malloc0(size); |
86 | if (!u) | |
87f0e418 LP |
87 | return NULL; |
88 | ||
d5099efc | 89 | u->names = set_new(&string_hash_ops); |
ac155bb8 | 90 | if (!u->names) { |
87f0e418 LP |
91 | free(u); |
92 | return NULL; | |
93 | } | |
94 | ||
ac155bb8 MS |
95 | u->manager = m; |
96 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
97 | u->default_dependencies = true; |
98 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 99 | u->unit_file_preset = -1; |
d420282b | 100 | u->on_failure_job_mode = JOB_REPLACE; |
efdb0237 | 101 | u->cgroup_inotify_wd = -1; |
36c16a7c | 102 | u->job_timeout = USEC_INFINITY; |
87f0e418 | 103 | |
6bf0f408 | 104 | RATELIMIT_INIT(u->start_limit, m->default_start_limit_interval, m->default_start_limit_burst); |
67bfdc97 | 105 | RATELIMIT_INIT(u->auto_stop_ratelimit, 10 * USEC_PER_SEC, 16); |
bea355da | 106 | |
87f0e418 LP |
107 | return u; |
108 | } | |
109 | ||
f278026d LP |
110 | bool unit_has_name(Unit *u, const char *name) { |
111 | assert(u); | |
112 | assert(name); | |
113 | ||
ac155bb8 | 114 | return !!set_get(u->names, (char*) name); |
f278026d LP |
115 | } |
116 | ||
598459ce LP |
117 | static void unit_init(Unit *u) { |
118 | CGroupContext *cc; | |
119 | ExecContext *ec; | |
120 | KillContext *kc; | |
121 | ||
122 | assert(u); | |
123 | assert(u->manager); | |
124 | assert(u->type >= 0); | |
125 | ||
126 | cc = unit_get_cgroup_context(u); | |
127 | if (cc) { | |
128 | cgroup_context_init(cc); | |
129 | ||
130 | /* Copy in the manager defaults into the cgroup | |
131 | * context, _before_ the rest of the settings have | |
132 | * been initialized */ | |
133 | ||
134 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
135 | cc->blockio_accounting = u->manager->default_blockio_accounting; | |
136 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 137 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
0af20ea2 LP |
138 | |
139 | if (u->type != UNIT_SLICE) | |
140 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
141 | } |
142 | ||
143 | ec = unit_get_exec_context(u); | |
144 | if (ec) | |
145 | exec_context_init(ec); | |
146 | ||
147 | kc = unit_get_kill_context(u); | |
148 | if (kc) | |
149 | kill_context_init(kc); | |
150 | ||
151 | if (UNIT_VTABLE(u)->init) | |
152 | UNIT_VTABLE(u)->init(u); | |
153 | } | |
154 | ||
87f0e418 | 155 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 156 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 157 | UnitType t; |
87f0e418 LP |
158 | int r; |
159 | ||
160 | assert(u); | |
161 | assert(text); | |
162 | ||
7410616c | 163 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 164 | |
ac155bb8 | 165 | if (!u->instance) |
9e2f7c11 | 166 | return -EINVAL; |
87f0e418 | 167 | |
7410616c LP |
168 | r = unit_name_replace_instance(text, u->instance, &s); |
169 | if (r < 0) | |
170 | return r; | |
171 | } else { | |
9e2f7c11 | 172 | s = strdup(text); |
7410616c LP |
173 | if (!s) |
174 | return -ENOMEM; | |
175 | } | |
87f0e418 | 176 | |
7410616c LP |
177 | if (set_contains(u->names, s)) |
178 | return 0; | |
179 | if (hashmap_contains(u->manager->units, s)) | |
180 | return -EEXIST; | |
181 | ||
182 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 183 | return -EINVAL; |
e537352b | 184 | |
7410616c LP |
185 | t = unit_name_to_type(s); |
186 | if (t < 0) | |
187 | return -EINVAL; | |
87f0e418 | 188 | |
598459ce LP |
189 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
190 | return -EINVAL; | |
87f0e418 | 191 | |
e48614c4 ZJS |
192 | r = unit_name_to_instance(s, &i); |
193 | if (r < 0) | |
598459ce | 194 | return r; |
87f0e418 | 195 | |
598459ce LP |
196 | if (i && unit_vtable[t]->no_instances) |
197 | return -EINVAL; | |
9e2f7c11 | 198 | |
276c3e78 | 199 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
200 | * but not both. Note that we do allow names with different |
201 | * instance names however! */ | |
598459ce LP |
202 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
203 | return -EINVAL; | |
9e2f7c11 | 204 | |
7410616c | 205 | if (unit_vtable[t]->no_alias && !set_isempty(u->names)) |
598459ce | 206 | return -EEXIST; |
9e2f7c11 | 207 | |
598459ce LP |
208 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
209 | return -E2BIG; | |
4f0f902f | 210 | |
e48614c4 | 211 | r = set_put(u->names, s); |
7410616c | 212 | if (r < 0) |
598459ce | 213 | return r; |
7410616c | 214 | assert(r > 0); |
87f0e418 | 215 | |
e48614c4 ZJS |
216 | r = hashmap_put(u->manager->units, s, u); |
217 | if (r < 0) { | |
7410616c | 218 | (void) set_remove(u->names, s); |
598459ce | 219 | return r; |
87f0e418 LP |
220 | } |
221 | ||
ac155bb8 | 222 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
223 | u->type = t; |
224 | u->id = s; | |
225 | u->instance = i; | |
9e2f7c11 | 226 | |
71fda00f | 227 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 228 | |
598459ce | 229 | unit_init(u); |
87f0e418 | 230 | |
598459ce LP |
231 | i = NULL; |
232 | } | |
9e2f7c11 | 233 | |
598459ce | 234 | s = NULL; |
9e2f7c11 | 235 | |
598459ce LP |
236 | unit_add_to_dbus_queue(u); |
237 | return 0; | |
87f0e418 LP |
238 | } |
239 | ||
0ae97ec1 | 240 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 241 | _cleanup_free_ char *t = NULL; |
598459ce | 242 | char *s, *i; |
276c3e78 | 243 | int r; |
0ae97ec1 LP |
244 | |
245 | assert(u); | |
246 | assert(name); | |
247 | ||
7410616c | 248 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 249 | |
ac155bb8 | 250 | if (!u->instance) |
9e2f7c11 LP |
251 | return -EINVAL; |
252 | ||
7410616c LP |
253 | r = unit_name_replace_instance(name, u->instance, &t); |
254 | if (r < 0) | |
255 | return r; | |
9e2f7c11 LP |
256 | |
257 | name = t; | |
258 | } | |
259 | ||
0ae97ec1 | 260 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 261 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 262 | if (!s) |
0ae97ec1 LP |
263 | return -ENOENT; |
264 | ||
7410616c | 265 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
266 | r = unit_name_to_instance(s, &i); |
267 | if (r < 0) | |
276c3e78 LP |
268 | return r; |
269 | ||
ac155bb8 | 270 | u->id = s; |
276c3e78 | 271 | |
ac155bb8 MS |
272 | free(u->instance); |
273 | u->instance = i; | |
276c3e78 | 274 | |
c1e1601e | 275 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 276 | |
0ae97ec1 LP |
277 | return 0; |
278 | } | |
279 | ||
f50e0a01 LP |
280 | int unit_set_description(Unit *u, const char *description) { |
281 | char *s; | |
282 | ||
283 | assert(u); | |
284 | ||
8aec412f LP |
285 | if (isempty(description)) |
286 | s = NULL; | |
287 | else { | |
288 | s = strdup(description); | |
289 | if (!s) | |
290 | return -ENOMEM; | |
291 | } | |
f50e0a01 | 292 | |
ac155bb8 MS |
293 | free(u->description); |
294 | u->description = s; | |
c1e1601e LP |
295 | |
296 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
297 | return 0; |
298 | } | |
299 | ||
701cc384 | 300 | bool unit_check_gc(Unit *u) { |
a354329f | 301 | UnitActiveState state; |
701cc384 LP |
302 | assert(u); |
303 | ||
a354329f | 304 | if (u->job) |
701cc384 LP |
305 | return true; |
306 | ||
a354329f | 307 | if (u->nop_job) |
6c073082 LP |
308 | return true; |
309 | ||
a354329f LP |
310 | state = unit_active_state(u); |
311 | ||
312 | /* If the unit is inactive and failed and no job is queued for | |
313 | * it, then release its runtime resources */ | |
314 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && | |
315 | UNIT_VTABLE(u)->release_resources) | |
316 | UNIT_VTABLE(u)->release_resources(u); | |
317 | ||
318 | /* But we keep the unit object around for longer when it is | |
319 | * referenced or configured to not be gc'ed */ | |
320 | if (state != UNIT_INACTIVE) | |
701cc384 LP |
321 | return true; |
322 | ||
a354329f | 323 | if (u->no_gc) |
701cc384 LP |
324 | return true; |
325 | ||
9d576438 LP |
326 | if (u->refs) |
327 | return true; | |
328 | ||
701cc384 LP |
329 | if (UNIT_VTABLE(u)->check_gc) |
330 | if (UNIT_VTABLE(u)->check_gc(u)) | |
331 | return true; | |
332 | ||
333 | return false; | |
334 | } | |
335 | ||
87f0e418 LP |
336 | void unit_add_to_load_queue(Unit *u) { |
337 | assert(u); | |
ac155bb8 | 338 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 339 | |
ac155bb8 | 340 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
341 | return; |
342 | ||
71fda00f | 343 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 344 | u->in_load_queue = true; |
87f0e418 LP |
345 | } |
346 | ||
23a177ef LP |
347 | void unit_add_to_cleanup_queue(Unit *u) { |
348 | assert(u); | |
349 | ||
ac155bb8 | 350 | if (u->in_cleanup_queue) |
23a177ef LP |
351 | return; |
352 | ||
71fda00f | 353 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 354 | u->in_cleanup_queue = true; |
23a177ef LP |
355 | } |
356 | ||
701cc384 LP |
357 | void unit_add_to_gc_queue(Unit *u) { |
358 | assert(u); | |
359 | ||
ac155bb8 | 360 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
361 | return; |
362 | ||
363 | if (unit_check_gc(u)) | |
364 | return; | |
365 | ||
71fda00f | 366 | LIST_PREPEND(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 367 | u->in_gc_queue = true; |
701cc384 | 368 | |
313cefa1 | 369 | u->manager->n_in_gc_queue++; |
701cc384 LP |
370 | } |
371 | ||
c1e1601e LP |
372 | void unit_add_to_dbus_queue(Unit *u) { |
373 | assert(u); | |
ac155bb8 | 374 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 375 | |
ac155bb8 | 376 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
377 | return; |
378 | ||
a567261a | 379 | /* Shortcut things if nobody cares */ |
8f8f05a9 LP |
380 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
381 | set_isempty(u->manager->private_buses)) { | |
ac155bb8 | 382 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
383 | return; |
384 | } | |
385 | ||
71fda00f | 386 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 387 | u->in_dbus_queue = true; |
c1e1601e LP |
388 | } |
389 | ||
87f0e418 LP |
390 | static void bidi_set_free(Unit *u, Set *s) { |
391 | Iterator i; | |
392 | Unit *other; | |
393 | ||
394 | assert(u); | |
395 | ||
396 | /* Frees the set and makes sure we are dropped from the | |
397 | * inverse pointers */ | |
398 | ||
399 | SET_FOREACH(other, s, i) { | |
400 | UnitDependency d; | |
401 | ||
402 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 403 | set_remove(other->dependencies[d], u); |
701cc384 LP |
404 | |
405 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
406 | } |
407 | ||
408 | set_free(s); | |
409 | } | |
410 | ||
c2756a68 LP |
411 | static void unit_remove_transient(Unit *u) { |
412 | char **i; | |
413 | ||
414 | assert(u); | |
415 | ||
416 | if (!u->transient) | |
417 | return; | |
418 | ||
419 | if (u->fragment_path) | |
3f5e8115 | 420 | (void) unlink(u->fragment_path); |
c2756a68 LP |
421 | |
422 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 423 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 424 | |
39591351 LP |
425 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
426 | if (!p) | |
427 | continue; | |
428 | ||
429 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
430 | if (!pp) | |
431 | continue; | |
432 | ||
433 | /* Only drop transient drop-ins */ | |
434 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
435 | continue; | |
c2756a68 | 436 | |
39591351 LP |
437 | (void) unlink(*i); |
438 | (void) rmdir(p); | |
c2756a68 LP |
439 | } |
440 | } | |
441 | ||
a57f7e2c LP |
442 | static void unit_free_requires_mounts_for(Unit *u) { |
443 | char **j; | |
444 | ||
445 | STRV_FOREACH(j, u->requires_mounts_for) { | |
446 | char s[strlen(*j) + 1]; | |
447 | ||
448 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
449 | char *y; | |
450 | Set *x; | |
451 | ||
452 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
453 | if (!x) | |
454 | continue; | |
455 | ||
456 | set_remove(x, u); | |
457 | ||
458 | if (set_isempty(x)) { | |
459 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
460 | free(y); | |
461 | set_free(x); | |
462 | } | |
463 | } | |
464 | } | |
465 | ||
6796073e | 466 | u->requires_mounts_for = strv_free(u->requires_mounts_for); |
a57f7e2c LP |
467 | } |
468 | ||
598459ce LP |
469 | static void unit_done(Unit *u) { |
470 | ExecContext *ec; | |
471 | CGroupContext *cc; | |
472 | ||
473 | assert(u); | |
474 | ||
475 | if (u->type < 0) | |
476 | return; | |
477 | ||
478 | if (UNIT_VTABLE(u)->done) | |
479 | UNIT_VTABLE(u)->done(u); | |
480 | ||
481 | ec = unit_get_exec_context(u); | |
482 | if (ec) | |
483 | exec_context_done(ec); | |
484 | ||
485 | cc = unit_get_cgroup_context(u); | |
486 | if (cc) | |
487 | cgroup_context_done(cc); | |
488 | } | |
489 | ||
87f0e418 LP |
490 | void unit_free(Unit *u) { |
491 | UnitDependency d; | |
492 | Iterator i; | |
493 | char *t; | |
494 | ||
495 | assert(u); | |
496 | ||
4f4afc88 LP |
497 | if (u->transient_file) |
498 | fclose(u->transient_file); | |
499 | ||
2c289ea8 | 500 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
501 | unit_remove_transient(u); |
502 | ||
c1e1601e LP |
503 | bus_unit_send_removed_signal(u); |
504 | ||
598459ce | 505 | unit_done(u); |
a013b84b | 506 | |
cf9fd508 DM |
507 | sd_bus_slot_unref(u->match_bus_slot); |
508 | ||
a57f7e2c LP |
509 | unit_free_requires_mounts_for(u); |
510 | ||
ac155bb8 MS |
511 | SET_FOREACH(t, u->names, i) |
512 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 513 | |
97e7d748 MS |
514 | if (u->job) { |
515 | Job *j = u->job; | |
516 | job_uninstall(j); | |
517 | job_free(j); | |
518 | } | |
964e0949 | 519 | |
e0209d83 MS |
520 | if (u->nop_job) { |
521 | Job *j = u->nop_job; | |
522 | job_uninstall(j); | |
523 | job_free(j); | |
524 | } | |
525 | ||
964e0949 | 526 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 527 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 528 | |
ac155bb8 | 529 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 530 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 531 | |
ac155bb8 | 532 | if (u->in_load_queue) |
71fda00f | 533 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 534 | |
ac155bb8 | 535 | if (u->in_dbus_queue) |
71fda00f | 536 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 537 | |
ac155bb8 | 538 | if (u->in_cleanup_queue) |
71fda00f | 539 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 540 | |
ac155bb8 | 541 | if (u->in_gc_queue) { |
71fda00f | 542 | LIST_REMOVE(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 543 | u->manager->n_in_gc_queue--; |
701cc384 LP |
544 | } |
545 | ||
4ad49000 | 546 | if (u->in_cgroup_queue) |
71fda00f | 547 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
87f0e418 | 548 | |
efdb0237 | 549 | unit_release_cgroup(u); |
72673e86 | 550 | |
5269eb6b | 551 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 552 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 553 | |
ac155bb8 | 554 | free(u->description); |
49dbfa7b | 555 | strv_free(u->documentation); |
ac155bb8 | 556 | free(u->fragment_path); |
1b64d026 | 557 | free(u->source_path); |
ae7a7182 | 558 | strv_free(u->dropin_paths); |
ac155bb8 | 559 | free(u->instance); |
87f0e418 | 560 | |
f189ab18 LP |
561 | free(u->job_timeout_reboot_arg); |
562 | ||
ac155bb8 | 563 | set_free_free(u->names); |
87f0e418 | 564 | |
a911bb9a LP |
565 | unit_unwatch_all_pids(u); |
566 | ||
ac155bb8 | 567 | condition_free_list(u->conditions); |
59fccdc5 | 568 | condition_free_list(u->asserts); |
52661efd | 569 | |
6bf0f408 LP |
570 | free(u->reboot_arg); |
571 | ||
702a2d8f LP |
572 | unit_ref_unset(&u->slice); |
573 | ||
ac155bb8 MS |
574 | while (u->refs) |
575 | unit_ref_unset(u->refs); | |
57020a3a | 576 | |
87f0e418 LP |
577 | free(u); |
578 | } | |
579 | ||
580 | UnitActiveState unit_active_state(Unit *u) { | |
581 | assert(u); | |
582 | ||
ac155bb8 | 583 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
584 | return unit_active_state(unit_follow_merge(u)); |
585 | ||
586 | /* After a reload it might happen that a unit is not correctly | |
587 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 588 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
589 | |
590 | return UNIT_VTABLE(u)->active_state(u); | |
591 | } | |
592 | ||
10a94420 LP |
593 | const char* unit_sub_state_to_string(Unit *u) { |
594 | assert(u); | |
595 | ||
596 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
597 | } | |
598 | ||
7c0b05e5 MS |
599 | static int complete_move(Set **s, Set **other) { |
600 | int r; | |
601 | ||
23a177ef LP |
602 | assert(s); |
603 | assert(other); | |
87f0e418 | 604 | |
23a177ef | 605 | if (!*other) |
7c0b05e5 | 606 | return 0; |
87f0e418 | 607 | |
7c0b05e5 MS |
608 | if (*s) { |
609 | r = set_move(*s, *other); | |
610 | if (r < 0) | |
611 | return r; | |
612 | } else { | |
23a177ef LP |
613 | *s = *other; |
614 | *other = NULL; | |
615 | } | |
7c0b05e5 MS |
616 | |
617 | return 0; | |
23a177ef | 618 | } |
87f0e418 | 619 | |
7c0b05e5 | 620 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
621 | char *t; |
622 | Iterator i; | |
7c0b05e5 | 623 | int r; |
87f0e418 | 624 | |
23a177ef LP |
625 | assert(u); |
626 | assert(other); | |
627 | ||
7c0b05e5 MS |
628 | r = complete_move(&u->names, &other->names); |
629 | if (r < 0) | |
630 | return r; | |
23a177ef | 631 | |
ac155bb8 MS |
632 | set_free_free(other->names); |
633 | other->names = NULL; | |
634 | other->id = NULL; | |
23a177ef | 635 | |
ac155bb8 MS |
636 | SET_FOREACH(t, u->names, i) |
637 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
638 | |
639 | return 0; | |
87f0e418 LP |
640 | } |
641 | ||
09a65f92 MS |
642 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
643 | unsigned n_reserve; | |
644 | ||
645 | assert(u); | |
646 | assert(other); | |
647 | assert(d < _UNIT_DEPENDENCY_MAX); | |
648 | ||
649 | /* | |
650 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 651 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
652 | * as a whole to u by complete_move(). |
653 | */ | |
654 | if (!u->dependencies[d]) | |
655 | return 0; | |
656 | ||
657 | /* merge_dependencies() will skip a u-on-u dependency */ | |
658 | n_reserve = set_size(other->dependencies[d]) - !!set_get(other->dependencies[d], u); | |
659 | ||
660 | return set_reserve(u->dependencies[d], n_reserve); | |
661 | } | |
662 | ||
d1fab3fe | 663 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
664 | Iterator i; |
665 | Unit *back; | |
87f0e418 | 666 | int r; |
23a177ef LP |
667 | |
668 | assert(u); | |
669 | assert(other); | |
670 | assert(d < _UNIT_DEPENDENCY_MAX); | |
671 | ||
83a95334 | 672 | /* Fix backwards pointers */ |
ac155bb8 | 673 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
674 | UnitDependency k; |
675 | ||
e48614c4 | 676 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff ZJS |
677 | /* Do not add dependencies between u and itself */ |
678 | if (back == u) { | |
d1fab3fe | 679 | if (set_remove(back->dependencies[k], other)) |
f2341e0a | 680 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff ZJS |
681 | } else { |
682 | r = set_remove_and_put(back->dependencies[k], other, u); | |
683 | if (r == -EEXIST) | |
684 | set_remove(back->dependencies[k], other); | |
685 | else | |
686 | assert(r >= 0 || r == -ENOENT); | |
687 | } | |
e48614c4 | 688 | } |
23a177ef LP |
689 | } |
690 | ||
e66047ff | 691 | /* Also do not move dependencies on u to itself */ |
d1fab3fe ZJS |
692 | back = set_remove(other->dependencies[d], u); |
693 | if (back) | |
f2341e0a | 694 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 695 | |
7c0b05e5 MS |
696 | /* The move cannot fail. The caller must have performed a reservation. */ |
697 | assert_se(complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); | |
23a177ef | 698 | |
525d3cc7 | 699 | other->dependencies[d] = set_free(other->dependencies[d]); |
23a177ef LP |
700 | } |
701 | ||
702 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 703 | UnitDependency d; |
d1fab3fe | 704 | const char *other_id = NULL; |
09a65f92 | 705 | int r; |
87f0e418 LP |
706 | |
707 | assert(u); | |
708 | assert(other); | |
ac155bb8 MS |
709 | assert(u->manager == other->manager); |
710 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 711 | |
cc916967 LP |
712 | other = unit_follow_merge(other); |
713 | ||
23a177ef LP |
714 | if (other == u) |
715 | return 0; | |
716 | ||
ac155bb8 | 717 | if (u->type != other->type) |
9e2f7c11 LP |
718 | return -EINVAL; |
719 | ||
ac155bb8 | 720 | if (!u->instance != !other->instance) |
87f0e418 LP |
721 | return -EINVAL; |
722 | ||
ac155bb8 | 723 | if (other->load_state != UNIT_STUB && |
c2756a68 | 724 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 725 | return -EEXIST; |
87f0e418 | 726 | |
ac155bb8 | 727 | if (other->job) |
819e213f LP |
728 | return -EEXIST; |
729 | ||
e0209d83 MS |
730 | if (other->nop_job) |
731 | return -EEXIST; | |
732 | ||
fdf20a31 | 733 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
734 | return -EEXIST; |
735 | ||
d1fab3fe ZJS |
736 | if (other->id) |
737 | other_id = strdupa(other->id); | |
738 | ||
09a65f92 MS |
739 | /* Make reservations to ensure merge_dependencies() won't fail */ |
740 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
741 | r = reserve_dependencies(u, other, d); | |
742 | /* | |
743 | * We don't rollback reservations if we fail. We don't have | |
744 | * a way to undo reservations. A reservation is not a leak. | |
745 | */ | |
746 | if (r < 0) | |
747 | return r; | |
748 | } | |
749 | ||
87f0e418 | 750 | /* Merge names */ |
7c0b05e5 MS |
751 | r = merge_names(u, other); |
752 | if (r < 0) | |
753 | return r; | |
87f0e418 | 754 | |
57020a3a | 755 | /* Redirect all references */ |
ac155bb8 MS |
756 | while (other->refs) |
757 | unit_ref_set(other->refs, u); | |
57020a3a | 758 | |
87f0e418 LP |
759 | /* Merge dependencies */ |
760 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 761 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 762 | |
ac155bb8 MS |
763 | other->load_state = UNIT_MERGED; |
764 | other->merged_into = u; | |
23a177ef | 765 | |
3616a49c LP |
766 | /* If there is still some data attached to the other node, we |
767 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 768 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
769 | if (UNIT_VTABLE(other)->done) |
770 | UNIT_VTABLE(other)->done(other); | |
771 | ||
772 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
773 | unit_add_to_cleanup_queue(other); |
774 | ||
775 | return 0; | |
776 | } | |
777 | ||
778 | int unit_merge_by_name(Unit *u, const char *name) { | |
779 | Unit *other; | |
9e2f7c11 | 780 | int r; |
68eda4bd | 781 | _cleanup_free_ char *s = NULL; |
23a177ef LP |
782 | |
783 | assert(u); | |
784 | assert(name); | |
785 | ||
7410616c | 786 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 787 | if (!u->instance) |
9e2f7c11 LP |
788 | return -EINVAL; |
789 | ||
7410616c LP |
790 | r = unit_name_replace_instance(name, u->instance, &s); |
791 | if (r < 0) | |
792 | return r; | |
9e2f7c11 LP |
793 | |
794 | name = s; | |
795 | } | |
796 | ||
c2756a68 | 797 | other = manager_get_unit(u->manager, name); |
7410616c LP |
798 | if (other) |
799 | return unit_merge(u, other); | |
23a177ef | 800 | |
7410616c | 801 | return unit_add_name(u, name); |
23a177ef LP |
802 | } |
803 | ||
804 | Unit* unit_follow_merge(Unit *u) { | |
805 | assert(u); | |
806 | ||
ac155bb8 MS |
807 | while (u->load_state == UNIT_MERGED) |
808 | assert_se(u = u->merged_into); | |
23a177ef LP |
809 | |
810 | return u; | |
811 | } | |
812 | ||
813 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
814 | int r; | |
815 | ||
816 | assert(u); | |
817 | assert(c); | |
818 | ||
36be24c8 ZJS |
819 | if (c->working_directory) { |
820 | r = unit_require_mounts_for(u, c->working_directory); | |
821 | if (r < 0) | |
822 | return r; | |
823 | } | |
824 | ||
825 | if (c->root_directory) { | |
826 | r = unit_require_mounts_for(u, c->root_directory); | |
827 | if (r < 0) | |
828 | return r; | |
829 | } | |
830 | ||
463d0d15 | 831 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
832 | return 0; |
833 | ||
834 | if (c->private_tmp) { | |
835 | r = unit_require_mounts_for(u, "/tmp"); | |
836 | if (r < 0) | |
837 | return r; | |
838 | ||
839 | r = unit_require_mounts_for(u, "/var/tmp"); | |
840 | if (r < 0) | |
841 | return r; | |
842 | } | |
843 | ||
ecc6e2b8 LP |
844 | if (c->std_output != EXEC_OUTPUT_KMSG && |
845 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 846 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
847 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
848 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 849 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 850 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 851 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 852 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 853 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 854 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 855 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
856 | return 0; |
857 | ||
858 | /* If syslog or kernel logging is requested, make sure our own | |
859 | * logging daemon is run first. */ | |
860 | ||
b46a529c LP |
861 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); |
862 | if (r < 0) | |
863 | return r; | |
23a177ef | 864 | |
87f0e418 LP |
865 | return 0; |
866 | } | |
867 | ||
87f0e418 LP |
868 | const char *unit_description(Unit *u) { |
869 | assert(u); | |
870 | ||
ac155bb8 MS |
871 | if (u->description) |
872 | return u->description; | |
87f0e418 | 873 | |
ac155bb8 | 874 | return strna(u->id); |
87f0e418 LP |
875 | } |
876 | ||
877 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 878 | char *t, **j; |
87f0e418 LP |
879 | UnitDependency d; |
880 | Iterator i; | |
47be870b | 881 | const char *prefix2; |
173e3821 | 882 | char |
a483fb59 | 883 | timestamp0[FORMAT_TIMESTAMP_MAX], |
173e3821 LP |
884 | timestamp1[FORMAT_TIMESTAMP_MAX], |
885 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
886 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
887 | timestamp4[FORMAT_TIMESTAMP_MAX], |
888 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 889 | Unit *following; |
eeaedb7c LP |
890 | _cleanup_set_free_ Set *following_set = NULL; |
891 | int r; | |
87f0e418 LP |
892 | |
893 | assert(u); | |
ac155bb8 | 894 | assert(u->type >= 0); |
87f0e418 | 895 | |
4c940960 | 896 | prefix = strempty(prefix); |
63c372cb | 897 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
898 | |
899 | fprintf(f, | |
40d50879 | 900 | "%s-> Unit %s:\n" |
87f0e418 | 901 | "%s\tDescription: %s\n" |
9e2f7c11 | 902 | "%s\tInstance: %s\n" |
87f0e418 | 903 | "%s\tUnit Load State: %s\n" |
2fad8195 | 904 | "%s\tUnit Active State: %s\n" |
b895d155 | 905 | "%s\tState Change Timestamp: %s\n" |
173e3821 | 906 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 907 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 908 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 909 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 910 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 911 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 912 | "%s\tTransient: %s\n" |
4ad49000 LP |
913 | "%s\tSlice: %s\n" |
914 | "%s\tCGroup: %s\n" | |
915 | "%s\tCGroup realized: %s\n" | |
6414b7c9 DS |
916 | "%s\tCGroup mask: 0x%x\n" |
917 | "%s\tCGroup members mask: 0x%x\n", | |
ac155bb8 | 918 | prefix, u->id, |
87f0e418 | 919 | prefix, unit_description(u), |
ac155bb8 MS |
920 | prefix, strna(u->instance), |
921 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 922 | prefix, unit_active_state_to_string(unit_active_state(u)), |
a483fb59 | 923 | prefix, strna(format_timestamp(timestamp0, sizeof(timestamp0), u->state_change_timestamp.realtime)), |
ac155bb8 MS |
924 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
925 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
926 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
927 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 928 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 929 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 930 | prefix, yes_no(u->transient), |
4ad49000 LP |
931 | prefix, strna(unit_slice_name(u)), |
932 | prefix, strna(u->cgroup_path), | |
933 | prefix, yes_no(u->cgroup_realized), | |
bc432dc7 | 934 | prefix, u->cgroup_realized_mask, |
6414b7c9 | 935 | prefix, u->cgroup_members_mask); |
0301abf4 | 936 | |
ac155bb8 | 937 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
938 | fprintf(f, "%s\tName: %s\n", prefix, t); |
939 | ||
49dbfa7b LP |
940 | STRV_FOREACH(j, u->documentation) |
941 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
942 | ||
eeaedb7c LP |
943 | following = unit_following(u); |
944 | if (following) | |
ac155bb8 | 945 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 946 | |
eeaedb7c LP |
947 | r = unit_following_set(u, &following_set); |
948 | if (r >= 0) { | |
949 | Unit *other; | |
950 | ||
951 | SET_FOREACH(other, following_set, i) | |
952 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
953 | } | |
954 | ||
ac155bb8 MS |
955 | if (u->fragment_path) |
956 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 957 | |
1b64d026 LP |
958 | if (u->source_path) |
959 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
960 | ||
ae7a7182 | 961 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 962 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 963 | |
36c16a7c | 964 | if (u->job_timeout != USEC_INFINITY) |
2fa4092c | 965 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 966 | |
f189ab18 LP |
967 | if (u->job_timeout_action != FAILURE_ACTION_NONE) |
968 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, failure_action_to_string(u->job_timeout_action)); | |
969 | ||
970 | if (u->job_timeout_reboot_arg) | |
971 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
972 | ||
59fccdc5 LP |
973 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
974 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 975 | |
ac155bb8 | 976 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
977 | fprintf(f, |
978 | "%s\tCondition Timestamp: %s\n" | |
979 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
980 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
981 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 982 | |
59fccdc5 LP |
983 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
984 | fprintf(f, | |
985 | "%s\tAssert Timestamp: %s\n" | |
986 | "%s\tAssert Result: %s\n", | |
987 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
988 | prefix, yes_no(u->assert_result)); | |
989 | ||
87f0e418 LP |
990 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
991 | Unit *other; | |
992 | ||
ac155bb8 MS |
993 | SET_FOREACH(other, u->dependencies[d], i) |
994 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
995 | } |
996 | ||
7c8fa05c | 997 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
998 | fprintf(f, |
999 | "%s\tRequiresMountsFor:", prefix); | |
1000 | ||
1001 | STRV_FOREACH(j, u->requires_mounts_for) | |
1002 | fprintf(f, " %s", *j); | |
1003 | ||
1004 | fputs("\n", f); | |
1005 | } | |
1006 | ||
ac155bb8 | 1007 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 1008 | |
b0650475 | 1009 | fprintf(f, |
a40eb732 | 1010 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
1011 | "%s\tRefuseManualStart: %s\n" |
1012 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 1013 | "%s\tDefaultDependencies: %s\n" |
d420282b | 1014 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1015 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1016 | prefix, yes_no(u->stop_when_unneeded), |
1017 | prefix, yes_no(u->refuse_manual_start), | |
1018 | prefix, yes_no(u->refuse_manual_stop), | |
1019 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1020 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1021 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 1022 | |
23a177ef LP |
1023 | if (UNIT_VTABLE(u)->dump) |
1024 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1025 | |
ac155bb8 | 1026 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1027 | fprintf(f, |
1028 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1029 | prefix, u->merged_into->id); |
1030 | else if (u->load_state == UNIT_ERROR) | |
1031 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 1032 | |
87f0e418 | 1033 | |
ac155bb8 MS |
1034 | if (u->job) |
1035 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1036 | |
e0209d83 MS |
1037 | if (u->nop_job) |
1038 | job_dump(u->nop_job, f, prefix2); | |
1039 | ||
87f0e418 LP |
1040 | } |
1041 | ||
1042 | /* Common implementation for multiple backends */ | |
e537352b | 1043 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1044 | int r; |
1045 | ||
1046 | assert(u); | |
23a177ef | 1047 | |
e48614c4 | 1048 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1049 | r = unit_load_fragment(u); |
1050 | if (r < 0) | |
23a177ef LP |
1051 | return r; |
1052 | ||
ac155bb8 | 1053 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1054 | return -ENOENT; |
1055 | ||
1056 | /* Load drop-in directory data */ | |
4ad49000 LP |
1057 | r = unit_load_dropin(unit_follow_merge(u)); |
1058 | if (r < 0) | |
23a177ef LP |
1059 | return r; |
1060 | ||
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | /* Common implementation for multiple backends */ | |
e537352b | 1065 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1066 | int r; |
87f0e418 LP |
1067 | |
1068 | assert(u); | |
1069 | ||
23a177ef LP |
1070 | /* Same as unit_load_fragment_and_dropin(), but whether |
1071 | * something can be loaded or not doesn't matter. */ | |
1072 | ||
1073 | /* Load a .service file */ | |
4ad49000 LP |
1074 | r = unit_load_fragment(u); |
1075 | if (r < 0) | |
87f0e418 LP |
1076 | return r; |
1077 | ||
ac155bb8 MS |
1078 | if (u->load_state == UNIT_STUB) |
1079 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1080 | |
87f0e418 | 1081 | /* Load drop-in directory data */ |
4ad49000 LP |
1082 | r = unit_load_dropin(unit_follow_merge(u)); |
1083 | if (r < 0) | |
87f0e418 LP |
1084 | return r; |
1085 | ||
23a177ef | 1086 | return 0; |
87f0e418 LP |
1087 | } |
1088 | ||
bba34eed | 1089 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1090 | assert(u); |
1091 | assert(target); | |
1092 | ||
ac155bb8 | 1093 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1094 | return 0; |
1095 | ||
35b8ca3a | 1096 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1097 | * that loop check below is reliable */ |
ac155bb8 MS |
1098 | if (u->load_state != UNIT_LOADED || |
1099 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1100 | return 0; |
1101 | ||
21256a2b LP |
1102 | /* If either side wants no automatic dependencies, then let's |
1103 | * skip this */ | |
ac155bb8 MS |
1104 | if (!u->default_dependencies || |
1105 | !target->default_dependencies) | |
21256a2b LP |
1106 | return 0; |
1107 | ||
98bc2000 | 1108 | /* Don't create loops */ |
ac155bb8 | 1109 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1110 | return 0; |
1111 | ||
1112 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
1113 | } | |
1114 | ||
e954c9cf | 1115 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 1116 | |
21256a2b LP |
1117 | static const UnitDependency deps[] = { |
1118 | UNIT_REQUIRED_BY, | |
be7d9ff7 | 1119 | UNIT_REQUISITE_OF, |
21256a2b LP |
1120 | UNIT_WANTED_BY, |
1121 | UNIT_BOUND_BY | |
1122 | }; | |
1123 | ||
bba34eed | 1124 | Unit *target; |
98bc2000 | 1125 | Iterator i; |
21256a2b | 1126 | unsigned k; |
db57f3c6 | 1127 | int r = 0; |
98bc2000 LP |
1128 | |
1129 | assert(u); | |
1130 | ||
21256a2b | 1131 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
1132 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
1133 | r = unit_add_default_target_dependency(u, target); | |
1134 | if (r < 0) | |
21256a2b | 1135 | return r; |
a016b922 LP |
1136 | } |
1137 | ||
e954c9cf LP |
1138 | return r; |
1139 | } | |
4ad49000 | 1140 | |
e954c9cf LP |
1141 | static int unit_add_slice_dependencies(Unit *u) { |
1142 | assert(u); | |
b81884e7 | 1143 | |
35b7ff80 | 1144 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1145 | return 0; |
1146 | ||
1147 | if (UNIT_ISSET(u->slice)) | |
8c8da0e0 | 1148 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true); |
e954c9cf | 1149 | |
8c8da0e0 | 1150 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1151 | return 0; |
1152 | ||
8c8da0e0 | 1153 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, NULL, true); |
98bc2000 LP |
1154 | } |
1155 | ||
e954c9cf | 1156 | static int unit_add_mount_dependencies(Unit *u) { |
9588bc32 LP |
1157 | char **i; |
1158 | int r; | |
1159 | ||
1160 | assert(u); | |
1161 | ||
1162 | STRV_FOREACH(i, u->requires_mounts_for) { | |
1163 | char prefix[strlen(*i) + 1]; | |
1164 | ||
1165 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
c7c89abb | 1166 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1167 | Unit *m; |
1168 | ||
c7c89abb | 1169 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1170 | if (r < 0) |
1171 | return r; | |
c7c89abb FB |
1172 | |
1173 | m = manager_get_unit(u->manager, p); | |
1174 | if (!m) { | |
1175 | /* Make sure to load the mount unit if | |
1176 | * it exists. If so the dependencies | |
1177 | * on this unit will be added later | |
1178 | * during the loading of the mount | |
1179 | * unit. */ | |
1180 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1181 | continue; |
c7c89abb | 1182 | } |
9588bc32 LP |
1183 | if (m == u) |
1184 | continue; | |
1185 | ||
1186 | if (m->load_state != UNIT_LOADED) | |
1187 | continue; | |
1188 | ||
1189 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1190 | if (r < 0) | |
1191 | return r; | |
1192 | ||
1193 | if (m->fragment_path) { | |
1194 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1195 | if (r < 0) | |
1196 | return r; | |
1197 | } | |
1198 | } | |
1199 | } | |
1200 | ||
1201 | return 0; | |
1202 | } | |
1203 | ||
95ae05c0 WC |
1204 | static int unit_add_startup_units(Unit *u) { |
1205 | CGroupContext *c; | |
5269eb6b | 1206 | int r; |
95ae05c0 WC |
1207 | |
1208 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1209 | if (!c) |
1210 | return 0; | |
1211 | ||
d53d9474 LP |
1212 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
1213 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) | |
db785129 LP |
1214 | return 0; |
1215 | ||
5269eb6b LP |
1216 | r = set_ensure_allocated(&u->manager->startup_units, NULL); |
1217 | if (r < 0) | |
1218 | return r; | |
1219 | ||
756c09e6 | 1220 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1221 | } |
1222 | ||
87f0e418 LP |
1223 | int unit_load(Unit *u) { |
1224 | int r; | |
1225 | ||
1226 | assert(u); | |
1227 | ||
ac155bb8 | 1228 | if (u->in_load_queue) { |
71fda00f | 1229 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1230 | u->in_load_queue = false; |
87f0e418 LP |
1231 | } |
1232 | ||
ac155bb8 | 1233 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1234 | return -EINVAL; |
1235 | ||
ac155bb8 | 1236 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1237 | return 0; |
1238 | ||
4f4afc88 LP |
1239 | if (u->transient_file) { |
1240 | r = fflush_and_check(u->transient_file); | |
1241 | if (r < 0) | |
1242 | goto fail; | |
1243 | ||
1244 | fclose(u->transient_file); | |
1245 | u->transient_file = NULL; | |
f9ba08fb LP |
1246 | |
1247 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4f4afc88 LP |
1248 | } |
1249 | ||
c2756a68 LP |
1250 | if (UNIT_VTABLE(u)->load) { |
1251 | r = UNIT_VTABLE(u)->load(u); | |
1252 | if (r < 0) | |
87f0e418 | 1253 | goto fail; |
c2756a68 | 1254 | } |
23a177ef | 1255 | |
ac155bb8 | 1256 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1257 | r = -ENOENT; |
1258 | goto fail; | |
1259 | } | |
1260 | ||
7c8fa05c | 1261 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1262 | |
e954c9cf LP |
1263 | r = unit_add_target_dependencies(u); |
1264 | if (r < 0) | |
1265 | goto fail; | |
1266 | ||
1267 | r = unit_add_slice_dependencies(u); | |
1268 | if (r < 0) | |
1269 | goto fail; | |
c2756a68 | 1270 | |
e954c9cf | 1271 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1272 | if (r < 0) |
c2756a68 | 1273 | goto fail; |
7c8fa05c | 1274 | |
95ae05c0 WC |
1275 | r = unit_add_startup_units(u); |
1276 | if (r < 0) | |
1277 | goto fail; | |
1278 | ||
bc432dc7 | 1279 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1280 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
c2756a68 LP |
1281 | r = -EINVAL; |
1282 | goto fail; | |
1283 | } | |
bc432dc7 LP |
1284 | |
1285 | unit_update_cgroup_members_masks(u); | |
f68319bb LP |
1286 | } |
1287 | ||
ac155bb8 | 1288 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1289 | |
1290 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1291 | unit_add_to_gc_queue(u); |
87f0e418 | 1292 | |
87f0e418 LP |
1293 | return 0; |
1294 | ||
1295 | fail: | |
c2756a68 | 1296 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1297 | u->load_error = r; |
c1e1601e | 1298 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1299 | unit_add_to_gc_queue(u); |
23a177ef | 1300 | |
f2341e0a | 1301 | log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
23a177ef | 1302 | |
87f0e418 LP |
1303 | return r; |
1304 | } | |
1305 | ||
49365733 LP |
1306 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1307 | Condition *c; | |
1308 | int triggered = -1; | |
1309 | ||
1310 | assert(u); | |
1311 | assert(to_string); | |
1312 | ||
1313 | /* If the condition list is empty, then it is true */ | |
1314 | if (!first) | |
1315 | return true; | |
1316 | ||
1317 | /* Otherwise, if all of the non-trigger conditions apply and | |
1318 | * if any of the trigger conditions apply (unless there are | |
1319 | * none) we return true */ | |
1320 | LIST_FOREACH(conditions, c, first) { | |
1321 | int r; | |
1322 | ||
1323 | r = condition_test(c); | |
1324 | if (r < 0) | |
f2341e0a LP |
1325 | log_unit_warning(u, |
1326 | "Couldn't determine result for %s=%s%s%s, assuming failed: %m", | |
49365733 LP |
1327 | to_string(c->type), |
1328 | c->trigger ? "|" : "", | |
1329 | c->negate ? "!" : "", | |
f2341e0a | 1330 | c->parameter); |
49365733 | 1331 | else |
f2341e0a LP |
1332 | log_unit_debug(u, |
1333 | "%s=%s%s%s %s.", | |
49365733 LP |
1334 | to_string(c->type), |
1335 | c->trigger ? "|" : "", | |
1336 | c->negate ? "!" : "", | |
1337 | c->parameter, | |
f2341e0a | 1338 | condition_result_to_string(c->result)); |
49365733 LP |
1339 | |
1340 | if (!c->trigger && r <= 0) | |
1341 | return false; | |
1342 | ||
1343 | if (c->trigger && triggered <= 0) | |
1344 | triggered = r > 0; | |
1345 | } | |
1346 | ||
1347 | return triggered != 0; | |
1348 | } | |
1349 | ||
9588bc32 | 1350 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1351 | assert(u); |
1352 | ||
ac155bb8 | 1353 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1354 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1355 | |
ac155bb8 | 1356 | return u->condition_result; |
90bbc946 LP |
1357 | } |
1358 | ||
59fccdc5 LP |
1359 | static bool unit_assert_test(Unit *u) { |
1360 | assert(u); | |
1361 | ||
1362 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1363 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1364 | |
1365 | return u->assert_result; | |
1366 | } | |
1367 | ||
df446f96 LP |
1368 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
1369 | DISABLE_WARNING_FORMAT_NONLITERAL; | |
1370 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, status, unit_status_msg_format, unit_description(u)); | |
1371 | REENABLE_WARNING; | |
1372 | } | |
1373 | ||
44a6b1b6 | 1374 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
877d54e9 | 1375 | const char *format; |
a85ca902 | 1376 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1377 | |
1378 | assert(u); | |
df446f96 | 1379 | assert(IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)); |
877d54e9 | 1380 | |
b5bf308b | 1381 | if (t != JOB_RELOAD) { |
a85ca902 MS |
1382 | format_table = &UNIT_VTABLE(u)->status_message_formats; |
1383 | if (format_table) { | |
1384 | format = format_table->starting_stopping[t == JOB_STOP]; | |
1385 | if (format) | |
1386 | return format; | |
1387 | } | |
1388 | } | |
877d54e9 LP |
1389 | |
1390 | /* Return generic strings */ | |
1391 | if (t == JOB_START) | |
1392 | return "Starting %s."; | |
1393 | else if (t == JOB_STOP) | |
1394 | return "Stopping %s."; | |
b5bf308b | 1395 | else |
877d54e9 | 1396 | return "Reloading %s."; |
877d54e9 LP |
1397 | } |
1398 | ||
1399 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1400 | const char *format; | |
1401 | ||
1402 | assert(u); | |
1403 | ||
df446f96 LP |
1404 | /* Reload status messages have traditionally not been printed to console. */ |
1405 | if (!IN_SET(t, JOB_START, JOB_STOP)) | |
1406 | return; | |
1407 | ||
877d54e9 | 1408 | format = unit_get_status_message_format(u, t); |
c6918296 | 1409 | |
bcfce235 | 1410 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1411 | unit_status_printf(u, "", format); |
bcfce235 | 1412 | REENABLE_WARNING; |
c6918296 MS |
1413 | } |
1414 | ||
877d54e9 LP |
1415 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
1416 | const char *format; | |
1417 | char buf[LINE_MAX]; | |
1418 | sd_id128_t mid; | |
1419 | ||
1420 | assert(u); | |
1421 | ||
df446f96 | 1422 | if (!IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)) |
877d54e9 LP |
1423 | return; |
1424 | ||
81270860 LP |
1425 | if (log_on_console()) |
1426 | return; | |
1427 | ||
877d54e9 LP |
1428 | /* We log status messages for all units and all operations. */ |
1429 | ||
a85ca902 | 1430 | format = unit_get_status_message_format(u, t); |
877d54e9 | 1431 | |
bcfce235 | 1432 | DISABLE_WARNING_FORMAT_NONLITERAL; |
d054f0a4 | 1433 | xsprintf(buf, format, unit_description(u)); |
bcfce235 | 1434 | REENABLE_WARNING; |
877d54e9 LP |
1435 | |
1436 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1437 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1438 | SD_MESSAGE_UNIT_RELOADING; | |
1439 | ||
f2341e0a LP |
1440 | /* Note that we deliberately use LOG_MESSAGE() instead of |
1441 | * LOG_UNIT_MESSAGE() here, since this is supposed to mimic | |
1442 | * closely what is written to screen using the status output, | |
1443 | * which is supposed the highest level, friendliest output | |
1444 | * possible, which means we should avoid the low-level unit | |
1445 | * name. */ | |
1446 | log_struct(LOG_INFO, | |
1447 | LOG_MESSAGE_ID(mid), | |
1448 | LOG_UNIT_ID(u), | |
1449 | LOG_MESSAGE("%s", buf), | |
1450 | NULL); | |
877d54e9 | 1451 | } |
877d54e9 | 1452 | |
d1a34ae9 | 1453 | void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t) { |
df446f96 LP |
1454 | assert(u); |
1455 | assert(t >= 0); | |
1456 | assert(t < _JOB_TYPE_MAX); | |
d1a34ae9 MS |
1457 | |
1458 | unit_status_log_starting_stopping_reloading(u, t); | |
df446f96 | 1459 | unit_status_print_starting_stopping(u, t); |
d1a34ae9 MS |
1460 | } |
1461 | ||
6bf0f408 LP |
1462 | static int unit_start_limit_test(Unit *u) { |
1463 | assert(u); | |
1464 | ||
1465 | if (ratelimit_test(&u->start_limit)) { | |
1466 | u->start_limit_hit = false; | |
1467 | return 0; | |
1468 | } | |
1469 | ||
1470 | log_unit_warning(u, "Start request repeated too quickly."); | |
1471 | u->start_limit_hit = true; | |
1472 | ||
1473 | return failure_action(u->manager, u->start_limit_action, u->reboot_arg); | |
1474 | } | |
1475 | ||
87f0e418 | 1476 | /* Errors: |
6bf0f408 LP |
1477 | * -EBADR: This unit type does not support starting. |
1478 | * -EALREADY: Unit is already started. | |
1479 | * -EAGAIN: An operation is already in progress. Retry later. | |
1480 | * -ECANCELED: Too many requests for now. | |
1481 | * -EPROTO: Assert failed | |
1482 | * -EINVAL: Unit not loaded | |
1483 | * -EOPNOTSUPP: Unit type not supported | |
87f0e418 LP |
1484 | */ |
1485 | int unit_start(Unit *u) { | |
1486 | UnitActiveState state; | |
92ab323c | 1487 | Unit *following; |
6bf0f408 | 1488 | int r; |
87f0e418 LP |
1489 | |
1490 | assert(u); | |
1491 | ||
a82e5507 LP |
1492 | /* If this is already started, then this will succeed. Note |
1493 | * that this will even succeed if this unit is not startable | |
1494 | * by the user. This is relied on to detect when we need to | |
1495 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1496 | state = unit_active_state(u); |
1497 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1498 | return -EALREADY; | |
1499 | ||
6bf0f408 LP |
1500 | /* Make sure we don't enter a busy loop of some kind. */ |
1501 | r = unit_start_limit_test(u); | |
1502 | if (r < 0) | |
1503 | return r; | |
1504 | ||
1505 | /* Units that aren't loaded cannot be started */ | |
1506 | if (u->load_state != UNIT_LOADED) | |
1507 | return -EINVAL; | |
1508 | ||
a82e5507 LP |
1509 | /* If the conditions failed, don't do anything at all. If we |
1510 | * already are activating this call might still be useful to | |
1511 | * speed up activation in case there is some hold-off time, | |
1512 | * but we don't want to recheck the condition in that case. */ | |
1513 | if (state != UNIT_ACTIVATING && | |
1514 | !unit_condition_test(u)) { | |
f2341e0a | 1515 | log_unit_debug(u, "Starting requested but condition failed. Not starting unit."); |
52661efd LP |
1516 | return -EALREADY; |
1517 | } | |
1518 | ||
59fccdc5 LP |
1519 | /* If the asserts failed, fail the entire job */ |
1520 | if (state != UNIT_ACTIVATING && | |
1521 | !unit_assert_test(u)) { | |
f2341e0a | 1522 | log_unit_notice(u, "Starting requested but asserts failed."); |
59fccdc5 LP |
1523 | return -EPROTO; |
1524 | } | |
1525 | ||
d11a7645 LP |
1526 | /* Units of types that aren't supported cannot be |
1527 | * started. Note that we do this test only after the condition | |
1528 | * checks, so that we rather return condition check errors | |
1529 | * (which are usually not considered a true failure) than "not | |
1530 | * supported" errors (which are considered a failure). | |
1531 | */ | |
1532 | if (!unit_supported(u)) | |
1533 | return -EOPNOTSUPP; | |
1534 | ||
92ab323c | 1535 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1536 | following = unit_following(u); |
1537 | if (following) { | |
f2341e0a | 1538 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1539 | return unit_start(following); |
1540 | } | |
1541 | ||
1542 | /* If it is stopped, but we cannot start it, then fail */ | |
1543 | if (!UNIT_VTABLE(u)->start) | |
1544 | return -EBADR; | |
1545 | ||
87f0e418 LP |
1546 | /* We don't suppress calls to ->start() here when we are |
1547 | * already starting, to allow this request to be used as a | |
1548 | * "hurry up" call, for example when the unit is in some "auto | |
1549 | * restart" state where it waits for a holdoff timer to elapse | |
1550 | * before it will start again. */ | |
1551 | ||
c1e1601e | 1552 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1553 | |
d1a34ae9 | 1554 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1555 | } |
1556 | ||
1557 | bool unit_can_start(Unit *u) { | |
1558 | assert(u); | |
1559 | ||
8ff4d2ab LP |
1560 | if (u->load_state != UNIT_LOADED) |
1561 | return false; | |
1562 | ||
1563 | if (!unit_supported(u)) | |
1564 | return false; | |
1565 | ||
87f0e418 LP |
1566 | return !!UNIT_VTABLE(u)->start; |
1567 | } | |
1568 | ||
2528a7a6 LP |
1569 | bool unit_can_isolate(Unit *u) { |
1570 | assert(u); | |
1571 | ||
1572 | return unit_can_start(u) && | |
ac155bb8 | 1573 | u->allow_isolate; |
2528a7a6 LP |
1574 | } |
1575 | ||
87f0e418 LP |
1576 | /* Errors: |
1577 | * -EBADR: This unit type does not support stopping. | |
1578 | * -EALREADY: Unit is already stopped. | |
1579 | * -EAGAIN: An operation is already in progress. Retry later. | |
1580 | */ | |
1581 | int unit_stop(Unit *u) { | |
1582 | UnitActiveState state; | |
92ab323c | 1583 | Unit *following; |
87f0e418 LP |
1584 | |
1585 | assert(u); | |
1586 | ||
87f0e418 | 1587 | state = unit_active_state(u); |
fdf20a31 | 1588 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1589 | return -EALREADY; |
1590 | ||
0faacd47 LP |
1591 | following = unit_following(u); |
1592 | if (following) { | |
f2341e0a | 1593 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1594 | return unit_stop(following); |
1595 | } | |
1596 | ||
7898b0cf LP |
1597 | if (!UNIT_VTABLE(u)->stop) |
1598 | return -EBADR; | |
1599 | ||
c1e1601e | 1600 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1601 | |
d1a34ae9 | 1602 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1603 | } |
1604 | ||
1605 | /* Errors: | |
1606 | * -EBADR: This unit type does not support reloading. | |
1607 | * -ENOEXEC: Unit is not started. | |
1608 | * -EAGAIN: An operation is already in progress. Retry later. | |
1609 | */ | |
1610 | int unit_reload(Unit *u) { | |
1611 | UnitActiveState state; | |
92ab323c | 1612 | Unit *following; |
87f0e418 LP |
1613 | |
1614 | assert(u); | |
1615 | ||
ac155bb8 | 1616 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1617 | return -EINVAL; |
1618 | ||
87f0e418 LP |
1619 | if (!unit_can_reload(u)) |
1620 | return -EBADR; | |
1621 | ||
1622 | state = unit_active_state(u); | |
e364ad06 | 1623 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1624 | return -EALREADY; |
1625 | ||
6a371e23 | 1626 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1627 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1628 | return -ENOEXEC; |
6a371e23 | 1629 | } |
87f0e418 | 1630 | |
e48614c4 ZJS |
1631 | following = unit_following(u); |
1632 | if (following) { | |
f2341e0a | 1633 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1634 | return unit_reload(following); |
1635 | } | |
1636 | ||
c1e1601e | 1637 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1638 | |
d1a34ae9 | 1639 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1640 | } |
1641 | ||
1642 | bool unit_can_reload(Unit *u) { | |
1643 | assert(u); | |
1644 | ||
1645 | if (!UNIT_VTABLE(u)->reload) | |
1646 | return false; | |
1647 | ||
1648 | if (!UNIT_VTABLE(u)->can_reload) | |
1649 | return true; | |
1650 | ||
1651 | return UNIT_VTABLE(u)->can_reload(u); | |
1652 | } | |
1653 | ||
b4a16b7b | 1654 | static void unit_check_unneeded(Unit *u) { |
be7d9ff7 | 1655 | |
4afd3348 | 1656 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
4bd29fe5 | 1657 | |
be7d9ff7 LP |
1658 | static const UnitDependency needed_dependencies[] = { |
1659 | UNIT_REQUIRED_BY, | |
084918ba | 1660 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1661 | UNIT_WANTED_BY, |
1662 | UNIT_BOUND_BY, | |
1663 | }; | |
1664 | ||
f3bff0eb | 1665 | Unit *other; |
be7d9ff7 LP |
1666 | Iterator i; |
1667 | unsigned j; | |
1668 | int r; | |
f3bff0eb LP |
1669 | |
1670 | assert(u); | |
1671 | ||
1672 | /* If this service shall be shut down when unneeded then do | |
1673 | * so. */ | |
1674 | ||
ac155bb8 | 1675 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1676 | return; |
1677 | ||
1678 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1679 | return; | |
1680 | ||
be7d9ff7 | 1681 | for (j = 0; j < ELEMENTSOF(needed_dependencies); j++) |
f3b85044 | 1682 | SET_FOREACH(other, u->dependencies[needed_dependencies[j]], i) |
be7d9ff7 LP |
1683 | if (unit_active_or_pending(other)) |
1684 | return; | |
b81884e7 | 1685 | |
bea355da LP |
1686 | /* If stopping a unit fails continously we might enter a stop |
1687 | * loop here, hence stop acting on the service being | |
1688 | * unnecessary after a while. */ | |
67bfdc97 | 1689 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { |
bea355da LP |
1690 | log_unit_warning(u, "Unit not needed anymore, but not stopping since we tried this too often recently."); |
1691 | return; | |
1692 | } | |
1693 | ||
f2341e0a | 1694 | log_unit_info(u, "Unit not needed anymore. Stopping."); |
f3bff0eb LP |
1695 | |
1696 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
4bd29fe5 | 1697 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
be7d9ff7 | 1698 | if (r < 0) |
4bd29fe5 | 1699 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
f3bff0eb LP |
1700 | } |
1701 | ||
ff502445 | 1702 | static void unit_check_binds_to(Unit *u) { |
4afd3348 | 1703 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
ff502445 LP |
1704 | bool stop = false; |
1705 | Unit *other; | |
1706 | Iterator i; | |
67bfdc97 | 1707 | int r; |
ff502445 LP |
1708 | |
1709 | assert(u); | |
1710 | ||
1711 | if (u->job) | |
1712 | return; | |
1713 | ||
1714 | if (unit_active_state(u) != UNIT_ACTIVE) | |
1715 | return; | |
1716 | ||
1717 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) { | |
1718 | if (other->job) | |
1719 | continue; | |
1720 | ||
1721 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1722 | continue; | |
1723 | ||
1724 | stop = true; | |
98f738b6 | 1725 | break; |
ff502445 LP |
1726 | } |
1727 | ||
1728 | if (!stop) | |
1729 | return; | |
1730 | ||
67bfdc97 LP |
1731 | /* If stopping a unit fails continously we might enter a stop |
1732 | * loop here, hence stop acting on the service being | |
1733 | * unnecessary after a while. */ | |
1734 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { | |
1735 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); | |
1736 | return; | |
1737 | } | |
1738 | ||
98f738b6 | 1739 | assert(other); |
f2341e0a | 1740 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
1741 | |
1742 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
4bd29fe5 | 1743 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
67bfdc97 | 1744 | if (r < 0) |
4bd29fe5 | 1745 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
ff502445 LP |
1746 | } |
1747 | ||
87f0e418 LP |
1748 | static void retroactively_start_dependencies(Unit *u) { |
1749 | Iterator i; | |
1750 | Unit *other; | |
1751 | ||
1752 | assert(u); | |
1753 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1754 | ||
ac155bb8 MS |
1755 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1756 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1757 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1758 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
b81884e7 | 1759 | |
7f2cddae | 1760 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1761 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1762 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1763 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
87f0e418 | 1764 | |
ac155bb8 MS |
1765 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1766 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1767 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1768 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL); |
87f0e418 | 1769 | |
ac155bb8 | 1770 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1771 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1772 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
69dd2852 | 1773 | |
ac155bb8 | 1774 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1775 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1776 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
87f0e418 LP |
1777 | } |
1778 | ||
1779 | static void retroactively_stop_dependencies(Unit *u) { | |
1780 | Iterator i; | |
1781 | Unit *other; | |
1782 | ||
1783 | assert(u); | |
1784 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1785 | ||
b81884e7 | 1786 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1787 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1788 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1789 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
cd0504d0 MS |
1790 | } |
1791 | ||
1792 | static void check_unneeded_dependencies(Unit *u) { | |
1793 | Iterator i; | |
1794 | Unit *other; | |
1795 | ||
1796 | assert(u); | |
1797 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1798 | |
1799 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1800 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1801 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1802 | unit_check_unneeded(other); |
ac155bb8 | 1803 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1804 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1805 | unit_check_unneeded(other); |
ac155bb8 | 1806 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1807 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1808 | unit_check_unneeded(other); |
7f2cddae | 1809 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1810 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1811 | unit_check_unneeded(other); | |
87f0e418 LP |
1812 | } |
1813 | ||
3ecaa09b | 1814 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1815 | Unit *other; |
1816 | Iterator i; | |
1817 | ||
1818 | assert(u); | |
1819 | ||
ac155bb8 | 1820 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1821 | return; |
1822 | ||
f2341e0a | 1823 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 1824 | |
ac155bb8 | 1825 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1826 | int r; |
1827 | ||
4bd29fe5 | 1828 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, NULL, NULL); |
c1b6628d | 1829 | if (r < 0) |
f2341e0a | 1830 | log_unit_error_errno(u, r, "Failed to enqueue OnFailure= job: %m"); |
222ae6a8 | 1831 | } |
c0daa706 LP |
1832 | } |
1833 | ||
3ecaa09b LP |
1834 | void unit_trigger_notify(Unit *u) { |
1835 | Unit *other; | |
1836 | Iterator i; | |
1837 | ||
1838 | assert(u); | |
1839 | ||
1840 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1841 | if (UNIT_VTABLE(other)->trigger_notify) | |
1842 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1843 | } | |
1844 | ||
e2f3b44c | 1845 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 1846 | Manager *m; |
7e6e7b06 | 1847 | bool unexpected; |
a096ed36 | 1848 | |
87f0e418 LP |
1849 | assert(u); |
1850 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1851 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1852 | |
8e471ccd LP |
1853 | /* Note that this is called for all low-level state changes, |
1854 | * even if they might map to the same high-level | |
865cc19a | 1855 | * UnitActiveState! That means that ns == os is an expected |
c5315881 | 1856 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1857 | * this function will be called too! */ |
87f0e418 | 1858 | |
546ac4f0 MS |
1859 | m = u->manager; |
1860 | ||
f755e3b7 | 1861 | /* Update timestamps for state changes */ |
2c289ea8 | 1862 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 1863 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 1864 | |
bdbf9951 | 1865 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 1866 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 1867 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 1868 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
1869 | |
1870 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 1871 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 1872 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 1873 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 1874 | } |
87f0e418 | 1875 | |
865cc19a | 1876 | /* Keep track of failed units */ |
5269eb6b | 1877 | (void) manager_update_failed_units(u->manager, u, ns == UNIT_FAILED); |
f755e3b7 LP |
1878 | |
1879 | /* Make sure the cgroup is always removed when we become inactive */ | |
fdf20a31 | 1880 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
efdb0237 | 1881 | unit_prune_cgroup(u); |
fb385181 | 1882 | |
9cd86184 | 1883 | /* Note that this doesn't apply to RemainAfterExit services exiting |
6f285378 | 1884 | * successfully, since there's no change of state in that case. Which is |
9cd86184 | 1885 | * why it is handled in service_set_state() */ |
7ed9f6cd | 1886 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
1887 | ExecContext *ec; |
1888 | ||
1889 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 1890 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 | 1891 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
313cefa1 | 1892 | m->n_on_console--; |
31a7eb86 ZJS |
1893 | |
1894 | if (m->n_on_console == 0) | |
1895 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 1896 | m->no_console_output = false; |
31a7eb86 | 1897 | } else |
313cefa1 | 1898 | m->n_on_console++; |
7ed9f6cd MS |
1899 | } |
1900 | } | |
1901 | ||
ac155bb8 | 1902 | if (u->job) { |
7e6e7b06 | 1903 | unexpected = false; |
87f0e418 | 1904 | |
ac155bb8 | 1905 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1906 | |
1907 | /* So we reached a different state for this | |
1908 | * job. Let's see if we can run it now if it | |
1909 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1910 | job_add_to_run_queue(u->job); |
87f0e418 | 1911 | |
b410e6b9 | 1912 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1913 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1914 | * hence needs to invalidate jobs. */ |
87f0e418 | 1915 | |
ac155bb8 | 1916 | switch (u->job->type) { |
87f0e418 | 1917 | |
b410e6b9 LP |
1918 | case JOB_START: |
1919 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1920 | |
b410e6b9 | 1921 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1922 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1923 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1924 | unexpected = true; |
41b02ec7 | 1925 | |
fdf20a31 | 1926 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1927 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1928 | } |
87f0e418 | 1929 | |
b410e6b9 | 1930 | break; |
87f0e418 | 1931 | |
b410e6b9 LP |
1932 | case JOB_RELOAD: |
1933 | case JOB_RELOAD_OR_START: | |
3282591d | 1934 | case JOB_TRY_RELOAD: |
87f0e418 | 1935 | |
ac155bb8 | 1936 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1937 | if (ns == UNIT_ACTIVE) |
5273510e | 1938 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1939 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1940 | unexpected = true; |
41b02ec7 | 1941 | |
fdf20a31 | 1942 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1943 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1944 | } |
b410e6b9 | 1945 | } |
87f0e418 | 1946 | |
b410e6b9 | 1947 | break; |
87f0e418 | 1948 | |
b410e6b9 LP |
1949 | case JOB_STOP: |
1950 | case JOB_RESTART: | |
1951 | case JOB_TRY_RESTART: | |
87f0e418 | 1952 | |
fdf20a31 | 1953 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1954 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1955 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1956 | unexpected = true; |
5273510e | 1957 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1958 | } |
87f0e418 | 1959 | |
b410e6b9 | 1960 | break; |
87f0e418 | 1961 | |
b410e6b9 LP |
1962 | default: |
1963 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1964 | } |
87f0e418 | 1965 | |
7e6e7b06 LP |
1966 | } else |
1967 | unexpected = true; | |
1968 | ||
2c289ea8 | 1969 | if (!MANAGER_IS_RELOADING(m)) { |
f3bff0eb | 1970 | |
bdbf9951 LP |
1971 | /* If this state change happened without being |
1972 | * requested by a job, then let's retroactively start | |
1973 | * or stop dependencies. We skip that step when | |
1974 | * deserializing, since we don't want to create any | |
1975 | * additional jobs just because something is already | |
1976 | * activated. */ | |
1977 | ||
1978 | if (unexpected) { | |
1979 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1980 | retroactively_start_dependencies(u); | |
1981 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1982 | retroactively_stop_dependencies(u); | |
1983 | } | |
5de9682c | 1984 | |
cd0504d0 | 1985 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 1986 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
1987 | check_unneeded_dependencies(u); |
1988 | ||
bdbf9951 | 1989 | if (ns != os && ns == UNIT_FAILED) { |
f2341e0a | 1990 | log_unit_notice(u, "Unit entered failed state."); |
3ecaa09b | 1991 | unit_start_on_failure(u); |
cd6d0a45 | 1992 | } |
3b2775c5 | 1993 | } |
e537352b | 1994 | |
3b2775c5 LP |
1995 | /* Some names are special */ |
1996 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1997 | ||
1998 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
865cc19a | 1999 | /* The bus might have just become available, |
3b2775c5 LP |
2000 | * hence try to connect to it, if we aren't |
2001 | * yet connected. */ | |
546ac4f0 | 2002 | bus_init(m, true); |
3b2775c5 | 2003 | |
ac155bb8 | 2004 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 2005 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
2c289ea8 | 2006 | !MANAGER_IS_RELOADING(m)) { |
3b2775c5 | 2007 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 2008 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 2009 | u->in_audit = true; |
3b2775c5 | 2010 | } |
e983b760 | 2011 | |
3b2775c5 | 2012 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 2013 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 2014 | |
3b2775c5 | 2015 | } else { |
bdbf9951 | 2016 | |
3b2775c5 LP |
2017 | /* We don't care about D-Bus here, since we'll get an |
2018 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 2019 | |
ac155bb8 | 2020 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
2021 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
2022 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
2c289ea8 | 2023 | !MANAGER_IS_RELOADING(m)) { |
4927fcae | 2024 | |
3b2775c5 LP |
2025 | /* Hmm, if there was no start record written |
2026 | * write it now, so that we always have a nice | |
2027 | * pair */ | |
ac155bb8 | 2028 | if (!u->in_audit) { |
546ac4f0 | 2029 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 2030 | |
3b2775c5 | 2031 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 2032 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
2033 | } else |
2034 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 2035 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 2036 | |
ac155bb8 | 2037 | u->in_audit = false; |
cd6d0a45 | 2038 | } |
f278026d LP |
2039 | } |
2040 | ||
546ac4f0 | 2041 | manager_recheck_journal(m); |
3ecaa09b | 2042 | unit_trigger_notify(u); |
3b2775c5 | 2043 | |
2c289ea8 | 2044 | if (!MANAGER_IS_RELOADING(u->manager)) { |
ff502445 LP |
2045 | /* Maybe we finished startup and are now ready for |
2046 | * being stopped because unneeded? */ | |
bf6dcfa6 | 2047 | unit_check_unneeded(u); |
c1e1601e | 2048 | |
ff502445 LP |
2049 | /* Maybe we finished startup, but something we needed |
2050 | * has vanished? Let's die then. (This happens when | |
2051 | * something BindsTo= to a Type=oneshot unit, as these | |
2052 | * units go directly from starting to inactive, | |
2053 | * without ever entering started.) */ | |
2054 | unit_check_binds_to(u); | |
2055 | } | |
2056 | ||
c1e1601e | 2057 | unit_add_to_dbus_queue(u); |
701cc384 | 2058 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2059 | } |
2060 | ||
87f0e418 | 2061 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
2062 | int q, r; |
2063 | ||
87f0e418 LP |
2064 | assert(u); |
2065 | assert(pid >= 1); | |
2066 | ||
5ba6985b LP |
2067 | /* Watch a specific PID. We only support one or two units |
2068 | * watching each PID for now, not more. */ | |
2069 | ||
d5099efc | 2070 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2071 | if (r < 0) |
2072 | return r; | |
2073 | ||
d5099efc | 2074 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL); |
a911bb9a LP |
2075 | if (r < 0) |
2076 | return r; | |
2077 | ||
fea72cc0 | 2078 | r = hashmap_put(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
5ba6985b | 2079 | if (r == -EEXIST) { |
d5099efc | 2080 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL); |
5ba6985b LP |
2081 | if (r < 0) |
2082 | return r; | |
05e343b7 | 2083 | |
fea72cc0 | 2084 | r = hashmap_put(u->manager->watch_pids2, PID_TO_PTR(pid), u); |
5ba6985b | 2085 | } |
a911bb9a | 2086 | |
fea72cc0 | 2087 | q = set_put(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2088 | if (q < 0) |
2089 | return q; | |
2090 | ||
2091 | return r; | |
87f0e418 LP |
2092 | } |
2093 | ||
2094 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
2095 | assert(u); | |
2096 | assert(pid >= 1); | |
2097 | ||
fea72cc0 LP |
2098 | (void) hashmap_remove_value(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
2099 | (void) hashmap_remove_value(u->manager->watch_pids2, PID_TO_PTR(pid), u); | |
2100 | (void) set_remove(u->pids, PID_TO_PTR(pid)); | |
a911bb9a LP |
2101 | } |
2102 | ||
bd44e61b LP |
2103 | void unit_unwatch_all_pids(Unit *u) { |
2104 | assert(u); | |
2105 | ||
2106 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2107 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2108 | |
efdb0237 | 2109 | u->pids = set_free(u->pids); |
a911bb9a LP |
2110 | } |
2111 | ||
2112 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2113 | Iterator i; | |
2114 | void *e; | |
2115 | ||
2116 | assert(u); | |
2117 | ||
2118 | /* Cleans dead PIDs from our list */ | |
2119 | ||
2120 | SET_FOREACH(e, u->pids, i) { | |
fea72cc0 | 2121 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2122 | |
2123 | if (pid == except1 || pid == except2) | |
2124 | continue; | |
2125 | ||
9f5650ae | 2126 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2127 | unit_unwatch_pid(u, pid); |
a911bb9a | 2128 | } |
87f0e418 LP |
2129 | } |
2130 | ||
87f0e418 LP |
2131 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2132 | assert(u); | |
2133 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2134 | ||
2135 | switch (j) { | |
2136 | ||
2137 | case JOB_VERIFY_ACTIVE: | |
2138 | case JOB_START: | |
57339f47 | 2139 | case JOB_STOP: |
e0209d83 | 2140 | case JOB_NOP: |
87f0e418 LP |
2141 | return true; |
2142 | ||
87f0e418 LP |
2143 | case JOB_RESTART: |
2144 | case JOB_TRY_RESTART: | |
2145 | return unit_can_start(u); | |
2146 | ||
2147 | case JOB_RELOAD: | |
3282591d | 2148 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2149 | return unit_can_reload(u); |
2150 | ||
2151 | case JOB_RELOAD_OR_START: | |
2152 | return unit_can_reload(u) && unit_can_start(u); | |
2153 | ||
2154 | default: | |
2155 | assert_not_reached("Invalid job type"); | |
2156 | } | |
2157 | } | |
2158 | ||
f2341e0a LP |
2159 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2160 | assert(u); | |
d1fab3fe | 2161 | |
f2341e0a LP |
2162 | /* Only warn about some unit types */ |
2163 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2164 | return; | |
3f3cc397 | 2165 | |
f2341e0a LP |
2166 | if (streq_ptr(u->id, other)) |
2167 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2168 | else | |
2169 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2170 | } |
2171 | ||
701cc384 | 2172 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
2173 | |
2174 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2175 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 2176 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 2177 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 2178 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2179 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 2180 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 2181 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 2182 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 2183 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2184 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2185 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2186 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2187 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2188 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2189 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2190 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2191 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2192 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2193 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2194 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2195 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2196 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2197 | }; |
701cc384 | 2198 | int r, q = 0, v = 0, w = 0; |
d1fab3fe | 2199 | Unit *orig_u = u, *orig_other = other; |
87f0e418 LP |
2200 | |
2201 | assert(u); | |
2202 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2203 | assert(other); |
2204 | ||
9f151f29 LP |
2205 | u = unit_follow_merge(u); |
2206 | other = unit_follow_merge(other); | |
2207 | ||
87f0e418 LP |
2208 | /* We won't allow dependencies on ourselves. We will not |
2209 | * consider them an error however. */ | |
d1fab3fe | 2210 | if (u == other) { |
f2341e0a | 2211 | maybe_warn_about_dependency(orig_u, orig_other->id, d); |
87f0e418 | 2212 | return 0; |
d1fab3fe | 2213 | } |
87f0e418 | 2214 | |
d5099efc | 2215 | r = set_ensure_allocated(&u->dependencies[d], NULL); |
613b411c | 2216 | if (r < 0) |
87f0e418 LP |
2217 | return r; |
2218 | ||
613b411c | 2219 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
d5099efc | 2220 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], NULL); |
613b411c LP |
2221 | if (r < 0) |
2222 | return r; | |
2223 | } | |
2224 | ||
2225 | if (add_reference) { | |
d5099efc | 2226 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], NULL); |
613b411c | 2227 | if (r < 0) |
5de9682c LP |
2228 | return r; |
2229 | ||
d5099efc | 2230 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], NULL); |
613b411c | 2231 | if (r < 0) |
701cc384 | 2232 | return r; |
613b411c | 2233 | } |
87f0e418 | 2234 | |
613b411c LP |
2235 | q = set_put(u->dependencies[d], other); |
2236 | if (q < 0) | |
701cc384 | 2237 | return q; |
87f0e418 | 2238 | |
613b411c LP |
2239 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2240 | v = set_put(other->dependencies[inverse_table[d]], u); | |
2241 | if (v < 0) { | |
5de9682c LP |
2242 | r = v; |
2243 | goto fail; | |
2244 | } | |
613b411c | 2245 | } |
701cc384 LP |
2246 | |
2247 | if (add_reference) { | |
613b411c LP |
2248 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
2249 | if (w < 0) { | |
701cc384 LP |
2250 | r = w; |
2251 | goto fail; | |
2252 | } | |
2253 | ||
613b411c LP |
2254 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
2255 | if (r < 0) | |
701cc384 | 2256 | goto fail; |
87f0e418 LP |
2257 | } |
2258 | ||
c1e1601e | 2259 | unit_add_to_dbus_queue(u); |
87f0e418 | 2260 | return 0; |
701cc384 LP |
2261 | |
2262 | fail: | |
2263 | if (q > 0) | |
ac155bb8 | 2264 | set_remove(u->dependencies[d], other); |
701cc384 LP |
2265 | |
2266 | if (v > 0) | |
ac155bb8 | 2267 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
2268 | |
2269 | if (w > 0) | |
ac155bb8 | 2270 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
2271 | |
2272 | return r; | |
87f0e418 | 2273 | } |
0301abf4 | 2274 | |
2c966c03 LP |
2275 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
2276 | int r; | |
2277 | ||
2278 | assert(u); | |
2279 | ||
3f3cc397 LP |
2280 | r = unit_add_dependency(u, d, other, add_reference); |
2281 | if (r < 0) | |
2c966c03 LP |
2282 | return r; |
2283 | ||
7410616c | 2284 | return unit_add_dependency(u, e, other, add_reference); |
2c966c03 LP |
2285 | } |
2286 | ||
7410616c LP |
2287 | static int resolve_template(Unit *u, const char *name, const char*path, char **buf, const char **ret) { |
2288 | int r; | |
9e2f7c11 LP |
2289 | |
2290 | assert(u); | |
2291 | assert(name || path); | |
7410616c LP |
2292 | assert(buf); |
2293 | assert(ret); | |
9e2f7c11 LP |
2294 | |
2295 | if (!name) | |
2b6bf07d | 2296 | name = basename(path); |
9e2f7c11 | 2297 | |
7410616c LP |
2298 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2299 | *buf = NULL; | |
2300 | *ret = name; | |
2301 | return 0; | |
9e2f7c11 LP |
2302 | } |
2303 | ||
ac155bb8 | 2304 | if (u->instance) |
7410616c | 2305 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 2306 | else { |
ae018d9b | 2307 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2308 | |
7410616c LP |
2309 | r = unit_name_to_prefix(u->id, &i); |
2310 | if (r < 0) | |
2311 | return r; | |
9e2f7c11 | 2312 | |
7410616c | 2313 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 2314 | } |
7410616c LP |
2315 | if (r < 0) |
2316 | return r; | |
9e2f7c11 | 2317 | |
7410616c LP |
2318 | *ret = *buf; |
2319 | return 0; | |
9e2f7c11 LP |
2320 | } |
2321 | ||
701cc384 | 2322 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
7410616c | 2323 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
2324 | Unit *other; |
2325 | int r; | |
2326 | ||
9e2f7c11 LP |
2327 | assert(u); |
2328 | assert(name || path); | |
09b6b09f | 2329 | |
7410616c LP |
2330 | r = resolve_template(u, name, path, &buf, &name); |
2331 | if (r < 0) | |
2332 | return r; | |
09b6b09f | 2333 | |
8afbb8e1 LP |
2334 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2335 | if (r < 0) | |
2336 | return r; | |
9e2f7c11 | 2337 | |
8afbb8e1 | 2338 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
2339 | } |
2340 | ||
2c966c03 | 2341 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
7410616c | 2342 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2343 | Unit *other; |
2344 | int r; | |
2c966c03 LP |
2345 | |
2346 | assert(u); | |
2347 | assert(name || path); | |
2348 | ||
7410616c LP |
2349 | r = resolve_template(u, name, path, &buf, &name); |
2350 | if (r < 0) | |
2351 | return r; | |
2c966c03 | 2352 | |
3f3cc397 LP |
2353 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2354 | if (r < 0) | |
68eda4bd | 2355 | return r; |
2c966c03 | 2356 | |
3f3cc397 | 2357 | return unit_add_two_dependencies(u, d, e, other, add_reference); |
2c966c03 LP |
2358 | } |
2359 | ||
0301abf4 | 2360 | int set_unit_path(const char *p) { |
0301abf4 | 2361 | /* This is mostly for debug purposes */ |
cbe46ead | 2362 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 2363 | return -errno; |
0301abf4 LP |
2364 | |
2365 | return 0; | |
2366 | } | |
88066b3a | 2367 | |
ea430986 | 2368 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2369 | assert(u); |
2370 | ||
ac155bb8 | 2371 | if (!u->id) |
04ade7d2 LP |
2372 | return NULL; |
2373 | ||
48899192 | 2374 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2375 | } |
2376 | ||
d79200e2 LP |
2377 | int unit_set_slice(Unit *u, Unit *slice) { |
2378 | assert(u); | |
2379 | assert(slice); | |
2380 | ||
2381 | /* Sets the unit slice if it has not been set before. Is extra | |
2382 | * careful, to only allow this for units that actually have a | |
2383 | * cgroup context. Also, we don't allow to set this for slices | |
2384 | * (since the parent slice is derived from the name). Make | |
2385 | * sure the unit we set is actually a slice. */ | |
2386 | ||
2387 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
2388 | return -EOPNOTSUPP; | |
2389 | ||
2390 | if (u->type == UNIT_SLICE) | |
2391 | return -EINVAL; | |
2392 | ||
102ef982 LP |
2393 | if (unit_active_state(u) != UNIT_INACTIVE) |
2394 | return -EBUSY; | |
2395 | ||
d79200e2 LP |
2396 | if (slice->type != UNIT_SLICE) |
2397 | return -EINVAL; | |
2398 | ||
efdb0237 LP |
2399 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
2400 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
2401 | return -EPERM; | |
2402 | ||
d79200e2 LP |
2403 | if (UNIT_DEREF(u->slice) == slice) |
2404 | return 0; | |
2405 | ||
2406 | if (UNIT_ISSET(u->slice)) | |
2407 | return -EBUSY; | |
2408 | ||
2409 | unit_ref_set(&u->slice, slice); | |
2410 | return 1; | |
2411 | } | |
2412 | ||
2413 | int unit_set_default_slice(Unit *u) { | |
a8833944 LP |
2414 | _cleanup_free_ char *b = NULL; |
2415 | const char *slice_name; | |
a016b922 LP |
2416 | Unit *slice; |
2417 | int r; | |
2418 | ||
2419 | assert(u); | |
2420 | ||
9444b1f2 | 2421 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2422 | return 0; |
2423 | ||
a8833944 LP |
2424 | if (u->instance) { |
2425 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2426 | |
a8833944 LP |
2427 | /* Implicitly place all instantiated units in their |
2428 | * own per-template slice */ | |
2429 | ||
7410616c LP |
2430 | r = unit_name_to_prefix(u->id, &prefix); |
2431 | if (r < 0) | |
2432 | return r; | |
a8833944 LP |
2433 | |
2434 | /* The prefix is already escaped, but it might include | |
2435 | * "-" which has a special meaning for slice units, | |
2436 | * hence escape it here extra. */ | |
7410616c | 2437 | escaped = unit_name_escape(prefix); |
a8833944 LP |
2438 | if (!escaped) |
2439 | return -ENOMEM; | |
2440 | ||
463d0d15 | 2441 | if (MANAGER_IS_SYSTEM(u->manager)) |
a8833944 LP |
2442 | b = strjoin("system-", escaped, ".slice", NULL); |
2443 | else | |
2444 | b = strappend(escaped, ".slice"); | |
2445 | if (!b) | |
2446 | return -ENOMEM; | |
2447 | ||
2448 | slice_name = b; | |
2449 | } else | |
2450 | slice_name = | |
463d0d15 | 2451 | MANAGER_IS_SYSTEM(u->manager) && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
2452 | ? SPECIAL_SYSTEM_SLICE |
2453 | : SPECIAL_ROOT_SLICE; | |
2454 | ||
2455 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2456 | if (r < 0) |
2457 | return r; | |
2458 | ||
d79200e2 | 2459 | return unit_set_slice(u, slice); |
a016b922 LP |
2460 | } |
2461 | ||
9444b1f2 LP |
2462 | const char *unit_slice_name(Unit *u) { |
2463 | assert(u); | |
2464 | ||
2465 | if (!UNIT_ISSET(u->slice)) | |
2466 | return NULL; | |
2467 | ||
2468 | return UNIT_DEREF(u->slice)->id; | |
2469 | } | |
2470 | ||
f6ff8c29 | 2471 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2472 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2473 | int r; |
2474 | ||
2475 | assert(u); | |
2476 | assert(type); | |
2477 | assert(_found); | |
2478 | ||
7410616c LP |
2479 | r = unit_name_change_suffix(u->id, type, &t); |
2480 | if (r < 0) | |
2481 | return r; | |
2482 | if (unit_has_name(u, t)) | |
2483 | return -EINVAL; | |
f6ff8c29 | 2484 | |
ac155bb8 | 2485 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2486 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2487 | return r; |
2488 | } | |
2489 | ||
bbc29086 DM |
2490 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
2491 | const char *name, *old_owner, *new_owner; | |
2492 | Unit *u = userdata; | |
2493 | int r; | |
2494 | ||
2495 | assert(message); | |
2496 | assert(u); | |
2497 | ||
2498 | r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner); | |
2499 | if (r < 0) { | |
2500 | bus_log_parse_error(r); | |
2501 | return 0; | |
2502 | } | |
2503 | ||
2504 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
2505 | UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); | |
2506 | ||
2507 | return 0; | |
2508 | } | |
2509 | ||
9806e87d LP |
2510 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
2511 | const char *match; | |
bbc29086 | 2512 | |
9806e87d LP |
2513 | assert(u); |
2514 | assert(bus); | |
2515 | assert(name); | |
bbc29086 DM |
2516 | |
2517 | if (u->match_bus_slot) | |
2518 | return -EBUSY; | |
2519 | ||
9806e87d | 2520 | match = strjoina("type='signal'," |
81d62103 ZJS |
2521 | "sender='org.freedesktop.DBus'," |
2522 | "path='/org/freedesktop/DBus'," | |
2523 | "interface='org.freedesktop.DBus'," | |
2524 | "member='NameOwnerChanged'," | |
2525 | "arg0='", name, "'"); | |
bbc29086 DM |
2526 | |
2527 | return sd_bus_add_match(bus, &u->match_bus_slot, match, signal_name_owner_changed, u); | |
2528 | } | |
2529 | ||
05e343b7 | 2530 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
2531 | int r; |
2532 | ||
05e343b7 LP |
2533 | assert(u); |
2534 | assert(name); | |
2535 | ||
2536 | /* Watch a specific name on the bus. We only support one unit | |
2537 | * watching each name for now. */ | |
2538 | ||
bbc29086 DM |
2539 | if (u->manager->api_bus) { |
2540 | /* If the bus is already available, install the match directly. | |
2541 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 2542 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 2543 | if (r < 0) |
8ea823b6 | 2544 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
2545 | } |
2546 | ||
2547 | r = hashmap_put(u->manager->watch_bus, name, u); | |
2548 | if (r < 0) { | |
2549 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
2550 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); | |
2551 | } | |
2552 | ||
2553 | return 0; | |
05e343b7 LP |
2554 | } |
2555 | ||
2556 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2557 | assert(u); | |
2558 | assert(name); | |
2559 | ||
ac155bb8 | 2560 | hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 2561 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
05e343b7 LP |
2562 | } |
2563 | ||
a16e1123 LP |
2564 | bool unit_can_serialize(Unit *u) { |
2565 | assert(u); | |
2566 | ||
2567 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2568 | } | |
2569 | ||
6b78f9b4 | 2570 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2571 | int r; |
2572 | ||
2573 | assert(u); | |
2574 | assert(f); | |
2575 | assert(fds); | |
2576 | ||
9bdb98c5 LP |
2577 | if (unit_can_serialize(u)) { |
2578 | ExecRuntime *rt; | |
a16e1123 | 2579 | |
9bdb98c5 | 2580 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
2581 | if (r < 0) |
2582 | return r; | |
9bdb98c5 LP |
2583 | |
2584 | rt = unit_get_exec_runtime(u); | |
2585 | if (rt) { | |
f2341e0a | 2586 | r = exec_runtime_serialize(u, rt, f, fds); |
9bdb98c5 LP |
2587 | if (r < 0) |
2588 | return r; | |
2589 | } | |
e0209d83 MS |
2590 | } |
2591 | ||
a483fb59 LP |
2592 | dual_timestamp_serialize(f, "state-change-timestamp", &u->state_change_timestamp); |
2593 | ||
ac155bb8 MS |
2594 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2595 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2596 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2597 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
a483fb59 | 2598 | |
ac155bb8 | 2599 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); |
59fccdc5 | 2600 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 2601 | |
ac155bb8 MS |
2602 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2603 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2604 | |
59fccdc5 LP |
2605 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
2606 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
2607 | ||
c2756a68 | 2608 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
5ad096b3 | 2609 | unit_serialize_item_format(u, f, "cpuacct-usage-base", "%" PRIu64, u->cpuacct_usage_base); |
c2756a68 LP |
2610 | |
2611 | if (u->cgroup_path) | |
2612 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
de1d4f9b | 2613 | unit_serialize_item(u, f, "cgroup-realized", yes_no(u->cgroup_realized)); |
c2756a68 | 2614 | |
613b411c LP |
2615 | if (serialize_jobs) { |
2616 | if (u->job) { | |
2617 | fprintf(f, "job\n"); | |
2618 | job_serialize(u->job, f, fds); | |
2619 | } | |
2620 | ||
2621 | if (u->nop_job) { | |
2622 | fprintf(f, "job\n"); | |
2623 | job_serialize(u->nop_job, f, fds); | |
2624 | } | |
2625 | } | |
2626 | ||
a16e1123 LP |
2627 | /* End marker */ |
2628 | fputc('\n', f); | |
2629 | return 0; | |
2630 | } | |
2631 | ||
a34ceba6 LP |
2632 | int unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { |
2633 | assert(u); | |
2634 | assert(f); | |
2635 | assert(key); | |
2636 | ||
2637 | if (!value) | |
2638 | return 0; | |
2639 | ||
2640 | fputs(key, f); | |
2641 | fputc('=', f); | |
2642 | fputs(value, f); | |
2643 | fputc('\n', f); | |
2644 | ||
2645 | return 1; | |
2646 | } | |
2647 | ||
2648 | int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *value) { | |
2649 | _cleanup_free_ char *c = NULL; | |
2650 | ||
2651 | assert(u); | |
2652 | assert(f); | |
2653 | assert(key); | |
2654 | ||
2655 | if (!value) | |
2656 | return 0; | |
2657 | ||
2658 | c = cescape(value); | |
2659 | if (!c) | |
2660 | return -ENOMEM; | |
2661 | ||
2662 | fputs(key, f); | |
2663 | fputc('=', f); | |
2664 | fputs(c, f); | |
2665 | fputc('\n', f); | |
2666 | ||
2667 | return 1; | |
2668 | } | |
2669 | ||
2670 | int unit_serialize_item_fd(Unit *u, FILE *f, FDSet *fds, const char *key, int fd) { | |
2671 | int copy; | |
2672 | ||
2673 | assert(u); | |
2674 | assert(f); | |
2675 | assert(key); | |
2676 | ||
2677 | if (fd < 0) | |
2678 | return 0; | |
2679 | ||
2680 | copy = fdset_put_dup(fds, fd); | |
2681 | if (copy < 0) | |
2682 | return copy; | |
2683 | ||
2684 | fprintf(f, "%s=%i\n", key, copy); | |
2685 | return 1; | |
2686 | } | |
2687 | ||
a16e1123 LP |
2688 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { |
2689 | va_list ap; | |
2690 | ||
2691 | assert(u); | |
2692 | assert(f); | |
2693 | assert(key); | |
2694 | assert(format); | |
2695 | ||
2696 | fputs(key, f); | |
2697 | fputc('=', f); | |
2698 | ||
2699 | va_start(ap, format); | |
2700 | vfprintf(f, format, ap); | |
2701 | va_end(ap); | |
2702 | ||
2703 | fputc('\n', f); | |
2704 | } | |
2705 | ||
a16e1123 | 2706 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
28b99ccd | 2707 | ExecRuntime **rt = NULL; |
9bdb98c5 | 2708 | size_t offset; |
a16e1123 LP |
2709 | int r; |
2710 | ||
2711 | assert(u); | |
2712 | assert(f); | |
2713 | assert(fds); | |
2714 | ||
613b411c LP |
2715 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2716 | if (offset > 0) | |
2717 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
2718 | ||
a16e1123 | 2719 | for (;;) { |
20c03b7b | 2720 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2721 | size_t k; |
2722 | ||
2723 | if (!fgets(line, sizeof(line), f)) { | |
2724 | if (feof(f)) | |
2725 | return 0; | |
2726 | return -errno; | |
2727 | } | |
2728 | ||
10f8e83c | 2729 | char_array_0(line); |
a16e1123 LP |
2730 | l = strstrip(line); |
2731 | ||
2732 | /* End marker */ | |
e911de99 | 2733 | if (isempty(l)) |
a483fb59 | 2734 | break; |
a16e1123 LP |
2735 | |
2736 | k = strcspn(l, "="); | |
2737 | ||
2738 | if (l[k] == '=') { | |
2739 | l[k] = 0; | |
2740 | v = l+k+1; | |
2741 | } else | |
2742 | v = l+k; | |
2743 | ||
cca098b0 | 2744 | if (streq(l, "job")) { |
39a18c60 MS |
2745 | if (v[0] == '\0') { |
2746 | /* new-style serialized job */ | |
9c3349e2 LP |
2747 | Job *j; |
2748 | ||
2749 | j = job_new_raw(u); | |
39a18c60 | 2750 | if (!j) |
e911de99 | 2751 | return log_oom(); |
39a18c60 MS |
2752 | |
2753 | r = job_deserialize(j, f, fds); | |
2754 | if (r < 0) { | |
2755 | job_free(j); | |
2756 | return r; | |
2757 | } | |
cca098b0 | 2758 | |
39a18c60 MS |
2759 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2760 | if (r < 0) { | |
2761 | job_free(j); | |
2762 | return r; | |
2763 | } | |
e0209d83 MS |
2764 | |
2765 | r = job_install_deserialized(j); | |
2766 | if (r < 0) { | |
2767 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2768 | job_free(j); | |
2769 | return r; | |
2770 | } | |
ed10fa8c LP |
2771 | } else /* legacy for pre-44 */ |
2772 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); | |
cca098b0 | 2773 | continue; |
a483fb59 LP |
2774 | } else if (streq(l, "state-change-timestamp")) { |
2775 | dual_timestamp_deserialize(v, &u->state_change_timestamp); | |
2776 | continue; | |
8aaf019b | 2777 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2778 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2779 | continue; |
2780 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2781 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2782 | continue; |
2783 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2784 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2785 | continue; |
2786 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2787 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2788 | continue; |
2791a8f8 | 2789 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2790 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 2791 | continue; |
59fccdc5 LP |
2792 | } else if (streq(l, "assert-timestamp")) { |
2793 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
2794 | continue; | |
2791a8f8 | 2795 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 2796 | |
e911de99 LP |
2797 | r = parse_boolean(v); |
2798 | if (r < 0) | |
f2341e0a | 2799 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 2800 | else |
e911de99 | 2801 | u->condition_result = r; |
efbac6d2 LP |
2802 | |
2803 | continue; | |
c2756a68 | 2804 | |
59fccdc5 | 2805 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 2806 | |
e911de99 LP |
2807 | r = parse_boolean(v); |
2808 | if (r < 0) | |
f2341e0a | 2809 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 2810 | else |
e911de99 | 2811 | u->assert_result = r; |
59fccdc5 LP |
2812 | |
2813 | continue; | |
2814 | ||
c2756a68 | 2815 | } else if (streq(l, "transient")) { |
c2756a68 | 2816 | |
e911de99 LP |
2817 | r = parse_boolean(v); |
2818 | if (r < 0) | |
f2341e0a | 2819 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 2820 | else |
e911de99 | 2821 | u->transient = r; |
c2756a68 LP |
2822 | |
2823 | continue; | |
e911de99 | 2824 | |
5ad096b3 LP |
2825 | } else if (streq(l, "cpuacct-usage-base")) { |
2826 | ||
2827 | r = safe_atou64(v, &u->cpuacct_usage_base); | |
2828 | if (r < 0) | |
f2341e0a | 2829 | log_unit_debug(u, "Failed to parse CPU usage %s, ignoring.", v); |
5ad096b3 | 2830 | |
0f908397 | 2831 | continue; |
4e595329 | 2832 | |
e911de99 | 2833 | } else if (streq(l, "cgroup")) { |
72673e86 | 2834 | |
e911de99 LP |
2835 | r = unit_set_cgroup_path(u, v); |
2836 | if (r < 0) | |
f2341e0a | 2837 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 2838 | |
efdb0237 LP |
2839 | (void) unit_watch_cgroup(u); |
2840 | ||
de1d4f9b WF |
2841 | continue; |
2842 | } else if (streq(l, "cgroup-realized")) { | |
2843 | int b; | |
2844 | ||
2845 | b = parse_boolean(v); | |
2846 | if (b < 0) | |
2847 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
2848 | else | |
2849 | u->cgroup_realized = b; | |
2850 | ||
c2756a68 | 2851 | continue; |
8aaf019b | 2852 | } |
cca098b0 | 2853 | |
9bdb98c5 LP |
2854 | if (unit_can_serialize(u)) { |
2855 | if (rt) { | |
f2341e0a | 2856 | r = exec_runtime_deserialize_item(u, rt, l, v, fds); |
e911de99 | 2857 | if (r < 0) { |
f2341e0a | 2858 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); |
e911de99 LP |
2859 | continue; |
2860 | } | |
2861 | ||
2862 | /* Returns positive if key was handled by the call */ | |
9bdb98c5 LP |
2863 | if (r > 0) |
2864 | continue; | |
2865 | } | |
2866 | ||
2867 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); | |
613b411c | 2868 | if (r < 0) |
f2341e0a | 2869 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 2870 | } |
a16e1123 | 2871 | } |
a483fb59 LP |
2872 | |
2873 | /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is | |
2874 | * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from | |
1f133e0d | 2875 | * before 228 where the base for timeouts was not persistent across reboots. */ |
a483fb59 LP |
2876 | |
2877 | if (!dual_timestamp_is_set(&u->state_change_timestamp)) | |
2878 | dual_timestamp_get(&u->state_change_timestamp); | |
2879 | ||
2880 | return 0; | |
a16e1123 LP |
2881 | } |
2882 | ||
9d06297e | 2883 | int unit_add_node_link(Unit *u, const char *what, bool wants, UnitDependency dep) { |
6e2ef85b | 2884 | Unit *device; |
68eda4bd | 2885 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
2886 | int r; |
2887 | ||
2888 | assert(u); | |
2889 | ||
6e2ef85b | 2890 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
2891 | if (isempty(what)) |
2892 | return 0; | |
6e2ef85b | 2893 | |
8407a5d0 | 2894 | if (!is_device_path(what)) |
6e2ef85b LP |
2895 | return 0; |
2896 | ||
47bc12e1 LP |
2897 | /* When device units aren't supported (such as in a |
2898 | * container), don't create dependencies on them. */ | |
1c2e9646 | 2899 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
2900 | return 0; |
2901 | ||
7410616c LP |
2902 | r = unit_name_from_path(what, ".device", &e); |
2903 | if (r < 0) | |
2904 | return r; | |
6e2ef85b | 2905 | |
ac155bb8 | 2906 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
2907 | if (r < 0) |
2908 | return r; | |
2909 | ||
9d06297e | 2910 | r = unit_add_two_dependencies(u, UNIT_AFTER, |
463d0d15 | 2911 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, |
9d06297e | 2912 | device, true); |
faa368e3 | 2913 | if (r < 0) |
6e2ef85b LP |
2914 | return r; |
2915 | ||
faa368e3 LP |
2916 | if (wants) { |
2917 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2918 | if (r < 0) | |
6e2ef85b | 2919 | return r; |
faa368e3 | 2920 | } |
6e2ef85b LP |
2921 | |
2922 | return 0; | |
2923 | } | |
a16e1123 | 2924 | |
be847e82 | 2925 | int unit_coldplug(Unit *u) { |
5a6158b6 | 2926 | int r = 0, q = 0; |
cca098b0 LP |
2927 | |
2928 | assert(u); | |
2929 | ||
f78f265f LP |
2930 | /* Make sure we don't enter a loop, when coldplugging |
2931 | * recursively. */ | |
2932 | if (u->coldplugged) | |
2933 | return 0; | |
2934 | ||
2935 | u->coldplugged = true; | |
2936 | ||
5a6158b6 | 2937 | if (UNIT_VTABLE(u)->coldplug) |
f78f265f | 2938 | r = UNIT_VTABLE(u)->coldplug(u); |
cca098b0 | 2939 | |
5a6158b6 LP |
2940 | if (u->job) |
2941 | q = job_coldplug(u->job); | |
2942 | ||
2943 | if (r < 0) | |
2944 | return r; | |
2945 | if (q < 0) | |
2946 | return q; | |
cca098b0 LP |
2947 | |
2948 | return 0; | |
2949 | } | |
2950 | ||
6d10d308 ZJS |
2951 | static bool fragment_mtime_changed(const char *path, usec_t mtime) { |
2952 | struct stat st; | |
2953 | ||
2954 | if (!path) | |
2955 | return false; | |
2956 | ||
2957 | if (stat(path, &st) < 0) | |
2958 | /* What, cannot access this anymore? */ | |
2959 | return true; | |
2960 | ||
2961 | if (mtime > 0) | |
2962 | /* For non-empty files check the mtime */ | |
2963 | return timespec_load(&st.st_mtim) != mtime; | |
2964 | else if (!null_or_empty(&st)) | |
2965 | /* For masked files check if they are still so */ | |
2966 | return true; | |
2967 | ||
2968 | return false; | |
2969 | } | |
2970 | ||
45fb0699 | 2971 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
2972 | _cleanup_strv_free_ char **t = NULL; |
2973 | char **path; | |
ae7a7182 | 2974 | unsigned loaded_cnt, current_cnt; |
1b64d026 | 2975 | |
45fb0699 LP |
2976 | assert(u); |
2977 | ||
6d10d308 ZJS |
2978 | if (fragment_mtime_changed(u->fragment_path, u->fragment_mtime) || |
2979 | fragment_mtime_changed(u->source_path, u->source_mtime)) | |
2980 | return true; | |
5f4b19f4 | 2981 | |
1a7f1b38 | 2982 | (void) unit_find_dropin_paths(u, &t); |
ae7a7182 OS |
2983 | loaded_cnt = strv_length(t); |
2984 | current_cnt = strv_length(u->dropin_paths); | |
2985 | ||
2986 | if (loaded_cnt == current_cnt) { | |
2987 | if (loaded_cnt == 0) | |
2988 | return false; | |
2989 | ||
2990 | if (strv_overlap(u->dropin_paths, t)) { | |
6d10d308 ZJS |
2991 | STRV_FOREACH(path, u->dropin_paths) |
2992 | if (fragment_mtime_changed(*path, u->dropin_mtime)) | |
ae7a7182 | 2993 | return true; |
ae7a7182 OS |
2994 | |
2995 | return false; | |
6d10d308 ZJS |
2996 | } |
2997 | } | |
2998 | ||
2999 | return true; | |
45fb0699 LP |
3000 | } |
3001 | ||
fdf20a31 | 3002 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3003 | assert(u); |
3004 | ||
fdf20a31 MM |
3005 | if (UNIT_VTABLE(u)->reset_failed) |
3006 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 LP |
3007 | |
3008 | RATELIMIT_RESET(u->start_limit); | |
3009 | u->start_limit_hit = false; | |
5632e374 LP |
3010 | } |
3011 | ||
a7f241db LP |
3012 | Unit *unit_following(Unit *u) { |
3013 | assert(u); | |
3014 | ||
3015 | if (UNIT_VTABLE(u)->following) | |
3016 | return UNIT_VTABLE(u)->following(u); | |
3017 | ||
3018 | return NULL; | |
3019 | } | |
3020 | ||
31afa0a4 | 3021 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3022 | assert(u); |
3023 | ||
31afa0a4 LP |
3024 | /* This call does check the current state of the unit. It's |
3025 | * hence useful to be called from state change calls of the | |
3026 | * unit itself, where the state isn't updated yet. This is | |
3027 | * different from unit_inactive_or_pending() which checks both | |
3028 | * the current state and for a queued job. */ | |
18ffdfda | 3029 | |
31afa0a4 LP |
3030 | return u->job && u->job->type == JOB_STOP; |
3031 | } | |
3032 | ||
3033 | bool unit_inactive_or_pending(Unit *u) { | |
3034 | assert(u); | |
3035 | ||
3036 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3037 | |
d956ac29 LP |
3038 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3039 | return true; | |
3040 | ||
31afa0a4 | 3041 | if (unit_stop_pending(u)) |
18ffdfda LP |
3042 | return true; |
3043 | ||
3044 | return false; | |
3045 | } | |
3046 | ||
31afa0a4 | 3047 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3048 | assert(u); |
3049 | ||
f60c2665 | 3050 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3051 | |
3052 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3053 | return true; | |
3054 | ||
ac155bb8 MS |
3055 | if (u->job && |
3056 | (u->job->type == JOB_START || | |
3057 | u->job->type == JOB_RELOAD_OR_START || | |
3058 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
3059 | return true; |
3060 | ||
3061 | return false; | |
3062 | } | |
3063 | ||
718db961 | 3064 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3065 | assert(u); |
3066 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 3067 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 3068 | |
8a0867d6 | 3069 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3070 | return -EOPNOTSUPP; |
8a0867d6 | 3071 | |
c74f17d9 | 3072 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3073 | } |
3074 | ||
82659fd7 LP |
3075 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
3076 | Set *pid_set; | |
3077 | int r; | |
3078 | ||
d5099efc | 3079 | pid_set = set_new(NULL); |
82659fd7 LP |
3080 | if (!pid_set) |
3081 | return NULL; | |
3082 | ||
3083 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3084 | if (main_pid > 0) { | |
fea72cc0 | 3085 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 LP |
3086 | if (r < 0) |
3087 | goto fail; | |
3088 | } | |
3089 | ||
3090 | if (control_pid > 0) { | |
fea72cc0 | 3091 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 LP |
3092 | if (r < 0) |
3093 | goto fail; | |
3094 | } | |
3095 | ||
3096 | return pid_set; | |
3097 | ||
3098 | fail: | |
3099 | set_free(pid_set); | |
3100 | return NULL; | |
3101 | } | |
3102 | ||
d91c34f2 LP |
3103 | int unit_kill_common( |
3104 | Unit *u, | |
3105 | KillWho who, | |
3106 | int signo, | |
3107 | pid_t main_pid, | |
3108 | pid_t control_pid, | |
718db961 | 3109 | sd_bus_error *error) { |
d91c34f2 | 3110 | |
814cc562 | 3111 | int r = 0; |
ac5e3a50 | 3112 | bool killed = false; |
814cc562 | 3113 | |
ac5e3a50 | 3114 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3115 | if (main_pid < 0) |
7358dc02 | 3116 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 3117 | else if (main_pid == 0) |
7358dc02 | 3118 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3119 | } |
3120 | ||
ac5e3a50 | 3121 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3122 | if (control_pid < 0) |
7358dc02 | 3123 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 3124 | else if (control_pid == 0) |
7358dc02 | 3125 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3126 | } |
3127 | ||
ac5e3a50 JS |
3128 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3129 | if (control_pid > 0) { | |
814cc562 MS |
3130 | if (kill(control_pid, signo) < 0) |
3131 | r = -errno; | |
ac5e3a50 JS |
3132 | else |
3133 | killed = true; | |
3134 | } | |
814cc562 | 3135 | |
ac5e3a50 JS |
3136 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3137 | if (main_pid > 0) { | |
814cc562 MS |
3138 | if (kill(main_pid, signo) < 0) |
3139 | r = -errno; | |
ac5e3a50 JS |
3140 | else |
3141 | killed = true; | |
3142 | } | |
814cc562 | 3143 | |
ac5e3a50 | 3144 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3145 | _cleanup_set_free_ Set *pid_set = NULL; |
3146 | int q; | |
3147 | ||
82659fd7 LP |
3148 | /* Exclude the main/control pids from being killed via the cgroup */ |
3149 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3150 | if (!pid_set) |
3151 | return -ENOMEM; | |
3152 | ||
d0667321 | 3153 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, false, false, pid_set); |
814cc562 MS |
3154 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
3155 | r = q; | |
ac5e3a50 JS |
3156 | else |
3157 | killed = true; | |
814cc562 MS |
3158 | } |
3159 | ||
201f0c91 | 3160 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL)) |
ac5e3a50 JS |
3161 | return -ESRCH; |
3162 | ||
814cc562 MS |
3163 | return r; |
3164 | } | |
3165 | ||
6210e7fc LP |
3166 | int unit_following_set(Unit *u, Set **s) { |
3167 | assert(u); | |
3168 | assert(s); | |
3169 | ||
3170 | if (UNIT_VTABLE(u)->following_set) | |
3171 | return UNIT_VTABLE(u)->following_set(u, s); | |
3172 | ||
3173 | *s = NULL; | |
3174 | return 0; | |
3175 | } | |
3176 | ||
a4375746 | 3177 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
3178 | int r; |
3179 | ||
a4375746 LP |
3180 | assert(u); |
3181 | ||
0ec0deaa LP |
3182 | if (u->unit_file_state < 0 && u->fragment_path) { |
3183 | r = unit_file_get_state( | |
463d0d15 | 3184 | u->manager->unit_file_scope, |
0ec0deaa LP |
3185 | NULL, |
3186 | basename(u->fragment_path), | |
3187 | &u->unit_file_state); | |
3188 | if (r < 0) | |
3189 | u->unit_file_state = UNIT_FILE_BAD; | |
3190 | } | |
a4375746 | 3191 | |
ac155bb8 | 3192 | return u->unit_file_state; |
a4375746 LP |
3193 | } |
3194 | ||
d2dc52db LP |
3195 | int unit_get_unit_file_preset(Unit *u) { |
3196 | assert(u); | |
3197 | ||
3198 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3199 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 3200 | u->manager->unit_file_scope, |
0ec0deaa LP |
3201 | NULL, |
3202 | basename(u->fragment_path)); | |
d2dc52db LP |
3203 | |
3204 | return u->unit_file_preset; | |
3205 | } | |
3206 | ||
57020a3a LP |
3207 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
3208 | assert(ref); | |
3209 | assert(u); | |
3210 | ||
3211 | if (ref->unit) | |
3212 | unit_ref_unset(ref); | |
3213 | ||
3214 | ref->unit = u; | |
71fda00f | 3215 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
3216 | return u; |
3217 | } | |
3218 | ||
3219 | void unit_ref_unset(UnitRef *ref) { | |
3220 | assert(ref); | |
3221 | ||
3222 | if (!ref->unit) | |
3223 | return; | |
3224 | ||
71fda00f | 3225 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
3226 | ref->unit = NULL; |
3227 | } | |
3228 | ||
598459ce LP |
3229 | int unit_patch_contexts(Unit *u) { |
3230 | CGroupContext *cc; | |
3231 | ExecContext *ec; | |
cba6e062 LP |
3232 | unsigned i; |
3233 | int r; | |
3234 | ||
e06c73cc | 3235 | assert(u); |
e06c73cc | 3236 | |
598459ce LP |
3237 | /* Patch in the manager defaults into the exec and cgroup |
3238 | * contexts, _after_ the rest of the settings have been | |
3239 | * initialized */ | |
085afe36 | 3240 | |
598459ce LP |
3241 | ec = unit_get_exec_context(u); |
3242 | if (ec) { | |
3243 | /* This only copies in the ones that need memory */ | |
3244 | for (i = 0; i < _RLIMIT_MAX; i++) | |
3245 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
3246 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
3247 | if (!ec->rlimit[i]) | |
3248 | return -ENOMEM; | |
3249 | } | |
3250 | ||
463d0d15 | 3251 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
3252 | !ec->working_directory) { |
3253 | ||
3254 | r = get_home_dir(&ec->working_directory); | |
3255 | if (r < 0) | |
3256 | return r; | |
4c08c824 LP |
3257 | |
3258 | /* Allow user services to run, even if the | |
3259 | * home directory is missing */ | |
3260 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
3261 | } |
3262 | ||
463d0d15 | 3263 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
3264 | (ec->syscall_whitelist || |
3265 | !set_isempty(ec->syscall_filter) || | |
3266 | !set_isempty(ec->syscall_archs) || | |
3267 | ec->address_families_whitelist || | |
3268 | !set_isempty(ec->address_families))) | |
3269 | ec->no_new_privileges = true; | |
e06c73cc | 3270 | |
598459ce | 3271 | if (ec->private_devices) |
a103496c | 3272 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_MKNOD); |
cba6e062 LP |
3273 | } |
3274 | ||
598459ce LP |
3275 | cc = unit_get_cgroup_context(u); |
3276 | if (cc) { | |
f513e420 | 3277 | |
598459ce LP |
3278 | if (ec && |
3279 | ec->private_devices && | |
3280 | cc->device_policy == CGROUP_AUTO) | |
3281 | cc->device_policy = CGROUP_CLOSED; | |
3282 | } | |
f1660f96 | 3283 | |
cba6e062 | 3284 | return 0; |
e06c73cc LP |
3285 | } |
3286 | ||
3ef63c31 LP |
3287 | ExecContext *unit_get_exec_context(Unit *u) { |
3288 | size_t offset; | |
3289 | assert(u); | |
3290 | ||
598459ce LP |
3291 | if (u->type < 0) |
3292 | return NULL; | |
3293 | ||
3ef63c31 LP |
3294 | offset = UNIT_VTABLE(u)->exec_context_offset; |
3295 | if (offset <= 0) | |
3296 | return NULL; | |
3297 | ||
3298 | return (ExecContext*) ((uint8_t*) u + offset); | |
3299 | } | |
3300 | ||
718db961 LP |
3301 | KillContext *unit_get_kill_context(Unit *u) { |
3302 | size_t offset; | |
3303 | assert(u); | |
3304 | ||
598459ce LP |
3305 | if (u->type < 0) |
3306 | return NULL; | |
3307 | ||
718db961 LP |
3308 | offset = UNIT_VTABLE(u)->kill_context_offset; |
3309 | if (offset <= 0) | |
3310 | return NULL; | |
3311 | ||
3312 | return (KillContext*) ((uint8_t*) u + offset); | |
3313 | } | |
3314 | ||
4ad49000 LP |
3315 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
3316 | size_t offset; | |
3317 | ||
598459ce LP |
3318 | if (u->type < 0) |
3319 | return NULL; | |
3320 | ||
4ad49000 LP |
3321 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
3322 | if (offset <= 0) | |
3323 | return NULL; | |
3324 | ||
3325 | return (CGroupContext*) ((uint8_t*) u + offset); | |
3326 | } | |
3327 | ||
613b411c LP |
3328 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
3329 | size_t offset; | |
3330 | ||
598459ce LP |
3331 | if (u->type < 0) |
3332 | return NULL; | |
3333 | ||
613b411c LP |
3334 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
3335 | if (offset <= 0) | |
3336 | return NULL; | |
3337 | ||
3338 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
3339 | } | |
3340 | ||
39591351 | 3341 | static const char* unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode) { |
3f5e8115 LP |
3342 | assert(u); |
3343 | ||
4f4afc88 LP |
3344 | if (!IN_SET(mode, UNIT_RUNTIME, UNIT_PERSISTENT)) |
3345 | return NULL; | |
3346 | ||
39591351 LP |
3347 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
3348 | return u->manager->lookup_paths.transient; | |
26d04f86 | 3349 | |
39591351 | 3350 | if (mode == UNIT_RUNTIME) |
4f4afc88 | 3351 | return u->manager->lookup_paths.runtime_control; |
3f5e8115 | 3352 | |
39591351 | 3353 | if (mode == UNIT_PERSISTENT) |
4f4afc88 | 3354 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 3355 | |
39591351 | 3356 | return NULL; |
71645aca LP |
3357 | } |
3358 | ||
8e2af478 | 3359 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
39591351 | 3360 | _cleanup_free_ char *p = NULL, *q = NULL; |
e20b2a86 | 3361 | const char *dir, *prefixed; |
26d04f86 | 3362 | int r; |
71645aca LP |
3363 | |
3364 | assert(u); | |
3365 | ||
4f4afc88 LP |
3366 | if (u->transient_file) { |
3367 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
3368 | * write to the transient unit file. */ | |
3369 | fputs(data, u->transient_file); | |
3370 | return 0; | |
3371 | } | |
3372 | ||
6d235724 | 3373 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3374 | return 0; |
3375 | ||
39591351 LP |
3376 | dir = unit_drop_in_dir(u, mode); |
3377 | if (!dir) | |
3378 | return -EINVAL; | |
71645aca | 3379 | |
e20b2a86 LP |
3380 | prefixed = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\" or an equivalent operation. Do not edit.\n", |
3381 | data); | |
3382 | ||
815b09d3 | 3383 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
3384 | if (r < 0) |
3385 | return r; | |
3386 | ||
815b09d3 LP |
3387 | (void) mkdir_p(p, 0755); |
3388 | r = write_string_file_atomic_label(q, prefixed); | |
adb76a70 WC |
3389 | if (r < 0) |
3390 | return r; | |
3391 | ||
815b09d3 | 3392 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
3393 | if (r < 0) |
3394 | return r; | |
815b09d3 | 3395 | q = NULL; |
adb76a70 | 3396 | |
adb76a70 WC |
3397 | strv_uniq(u->dropin_paths); |
3398 | ||
3399 | u->dropin_mtime = now(CLOCK_REALTIME); | |
3400 | ||
3401 | return 0; | |
26d04f86 | 3402 | } |
71645aca | 3403 | |
b9ec9359 LP |
3404 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3405 | _cleanup_free_ char *p = NULL; | |
3406 | va_list ap; | |
3407 | int r; | |
3408 | ||
3409 | assert(u); | |
3410 | assert(name); | |
3411 | assert(format); | |
3412 | ||
6d235724 | 3413 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3414 | return 0; |
3415 | ||
3416 | va_start(ap, format); | |
3417 | r = vasprintf(&p, format, ap); | |
3418 | va_end(ap); | |
3419 | ||
3420 | if (r < 0) | |
3421 | return -ENOMEM; | |
3422 | ||
3423 | return unit_write_drop_in(u, mode, name, p); | |
3424 | } | |
3425 | ||
3426 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
39591351 | 3427 | const char *ndata; |
b42defe3 LP |
3428 | |
3429 | assert(u); | |
3430 | assert(name); | |
3431 | assert(data); | |
3432 | ||
3433 | if (!UNIT_VTABLE(u)->private_section) | |
3434 | return -EINVAL; | |
3435 | ||
6d235724 | 3436 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3437 | return 0; |
3438 | ||
81d62103 | 3439 | ndata = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); |
b42defe3 LP |
3440 | |
3441 | return unit_write_drop_in(u, mode, name, ndata); | |
3442 | } | |
3443 | ||
b9ec9359 LP |
3444 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3445 | _cleanup_free_ char *p = NULL; | |
3446 | va_list ap; | |
3447 | int r; | |
3448 | ||
3449 | assert(u); | |
3450 | assert(name); | |
3451 | assert(format); | |
3452 | ||
6d235724 | 3453 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3454 | return 0; |
3455 | ||
3456 | va_start(ap, format); | |
3457 | r = vasprintf(&p, format, ap); | |
3458 | va_end(ap); | |
3459 | ||
3460 | if (r < 0) | |
3461 | return -ENOMEM; | |
3462 | ||
3463 | return unit_write_drop_in_private(u, mode, name, p); | |
3464 | } | |
71645aca | 3465 | |
c2756a68 | 3466 | int unit_make_transient(Unit *u) { |
4f4afc88 LP |
3467 | FILE *f; |
3468 | char *path; | |
3469 | ||
c2756a68 LP |
3470 | assert(u); |
3471 | ||
3f5e8115 LP |
3472 | if (!UNIT_VTABLE(u)->can_transient) |
3473 | return -EOPNOTSUPP; | |
3474 | ||
4f4afc88 LP |
3475 | path = strjoin(u->manager->lookup_paths.transient, "/", u->id, NULL); |
3476 | if (!path) | |
3477 | return -ENOMEM; | |
3478 | ||
3479 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
3480 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
3481 | ||
78e334b5 | 3482 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 3483 | f = fopen(path, "we"); |
78e334b5 ZJS |
3484 | if (!f) { |
3485 | free(path); | |
3486 | return -errno; | |
3487 | } | |
4f4afc88 LP |
3488 | } |
3489 | ||
3490 | if (u->transient_file) | |
3491 | fclose(u->transient_file); | |
3492 | u->transient_file = f; | |
3493 | ||
3494 | free(u->fragment_path); | |
3495 | u->fragment_path = path; | |
7c65093a | 3496 | |
7c65093a LP |
3497 | u->source_path = mfree(u->source_path); |
3498 | u->dropin_paths = strv_free(u->dropin_paths); | |
3499 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
3500 | ||
4f4afc88 LP |
3501 | u->load_state = UNIT_STUB; |
3502 | u->load_error = 0; | |
3503 | u->transient = true; | |
3504 | ||
7c65093a LP |
3505 | unit_add_to_dbus_queue(u); |
3506 | unit_add_to_gc_queue(u); | |
3507 | unit_add_to_load_queue(u); | |
c2756a68 | 3508 | |
4f4afc88 LP |
3509 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
3510 | u->transient_file); | |
3511 | ||
3f5e8115 | 3512 | return 0; |
c2756a68 LP |
3513 | } |
3514 | ||
cd2086fe LP |
3515 | int unit_kill_context( |
3516 | Unit *u, | |
3517 | KillContext *c, | |
db2cb23b | 3518 | KillOperation k, |
cd2086fe LP |
3519 | pid_t main_pid, |
3520 | pid_t control_pid, | |
3521 | bool main_pid_alien) { | |
3522 | ||
b821a397 LP |
3523 | bool wait_for_exit = false; |
3524 | int sig, r; | |
cd2086fe LP |
3525 | |
3526 | assert(u); | |
3527 | assert(c); | |
3528 | ||
3529 | if (c->kill_mode == KILL_NONE) | |
3530 | return 0; | |
3531 | ||
db2cb23b UTL |
3532 | switch (k) { |
3533 | case KILL_KILL: | |
3534 | sig = SIGKILL; | |
3535 | break; | |
3536 | case KILL_ABORT: | |
3537 | sig = SIGABRT; | |
3538 | break; | |
3539 | case KILL_TERMINATE: | |
3540 | sig = c->kill_signal; | |
3541 | break; | |
3542 | default: | |
3543 | assert_not_reached("KillOperation unknown"); | |
3544 | } | |
cd2086fe LP |
3545 | |
3546 | if (main_pid > 0) { | |
3547 | r = kill_and_sigcont(main_pid, sig); | |
3548 | ||
3549 | if (r < 0 && r != -ESRCH) { | |
3550 | _cleanup_free_ char *comm = NULL; | |
3551 | get_process_comm(main_pid, &comm); | |
3552 | ||
b821a397 | 3553 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 3554 | } else { |
bc6aed7b LP |
3555 | if (!main_pid_alien) |
3556 | wait_for_exit = true; | |
82659fd7 | 3557 | |
d0667321 LP |
3558 | if (c->send_sighup && k == KILL_TERMINATE) |
3559 | (void) kill(main_pid, SIGHUP); | |
82659fd7 | 3560 | } |
cd2086fe LP |
3561 | } |
3562 | ||
3563 | if (control_pid > 0) { | |
3564 | r = kill_and_sigcont(control_pid, sig); | |
3565 | ||
3566 | if (r < 0 && r != -ESRCH) { | |
3567 | _cleanup_free_ char *comm = NULL; | |
3568 | get_process_comm(control_pid, &comm); | |
3569 | ||
b821a397 | 3570 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 3571 | } else { |
cd2086fe | 3572 | wait_for_exit = true; |
82659fd7 | 3573 | |
d0667321 LP |
3574 | if (c->send_sighup && k == KILL_TERMINATE) |
3575 | (void) kill(control_pid, SIGHUP); | |
82659fd7 | 3576 | } |
cd2086fe LP |
3577 | } |
3578 | ||
b821a397 LP |
3579 | if (u->cgroup_path && |
3580 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
3581 | _cleanup_set_free_ Set *pid_set = NULL; |
3582 | ||
82659fd7 LP |
3583 | /* Exclude the main/control pids from being killed via the cgroup */ |
3584 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
3585 | if (!pid_set) |
3586 | return -ENOMEM; | |
3587 | ||
d0667321 | 3588 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, k != KILL_TERMINATE, false, pid_set); |
cd2086fe LP |
3589 | if (r < 0) { |
3590 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
b821a397 LP |
3591 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
3592 | ||
82659fd7 | 3593 | } else if (r > 0) { |
bc6aed7b | 3594 | |
efdb0237 LP |
3595 | /* FIXME: For now, on the legacy hierarchy, we |
3596 | * will not wait for the cgroup members to die | |
3597 | * if we are running in a container or if this | |
3598 | * is a delegation unit, simply because cgroup | |
3599 | * notification is unreliable in these | |
3600 | * cases. It doesn't work at all in | |
3601 | * containers, and outside of containers it | |
3602 | * can be confused easily by left-over | |
ccddd104 | 3603 | * directories in the cgroup — which however |
efdb0237 LP |
3604 | * should not exist in non-delegated units. On |
3605 | * the unified hierarchy that's different, | |
3606 | * there we get proper events. Hence rely on | |
3607 | * them.*/ | |
3608 | ||
3609 | if (cg_unified() > 0 || | |
75f86906 | 3610 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 3611 | wait_for_exit = true; |
58ea275a | 3612 | |
db2cb23b | 3613 | if (c->send_sighup && k != KILL_KILL) { |
82659fd7 LP |
3614 | set_free(pid_set); |
3615 | ||
3616 | pid_set = unit_pid_set(main_pid, control_pid); | |
3617 | if (!pid_set) | |
3618 | return -ENOMEM; | |
3619 | ||
8190da36 | 3620 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, false, true, false, pid_set); |
82659fd7 LP |
3621 | } |
3622 | } | |
cd2086fe LP |
3623 | } |
3624 | ||
3625 | return wait_for_exit; | |
3626 | } | |
3627 | ||
a57f7e2c LP |
3628 | int unit_require_mounts_for(Unit *u, const char *path) { |
3629 | char prefix[strlen(path) + 1], *p; | |
3630 | int r; | |
3631 | ||
3632 | assert(u); | |
3633 | assert(path); | |
3634 | ||
3635 | /* Registers a unit for requiring a certain path and all its | |
3636 | * prefixes. We keep a simple array of these paths in the | |
3637 | * unit, since its usually short. However, we build a prefix | |
3638 | * table for all possible prefixes so that new appearing mount | |
3639 | * units can easily determine which units to make themselves a | |
3640 | * dependency of. */ | |
3641 | ||
70b64bd3 ZJS |
3642 | if (!path_is_absolute(path)) |
3643 | return -EINVAL; | |
3644 | ||
a57f7e2c LP |
3645 | p = strdup(path); |
3646 | if (!p) | |
3647 | return -ENOMEM; | |
3648 | ||
3649 | path_kill_slashes(p); | |
3650 | ||
a57f7e2c LP |
3651 | if (!path_is_safe(p)) { |
3652 | free(p); | |
3653 | return -EPERM; | |
3654 | } | |
3655 | ||
3656 | if (strv_contains(u->requires_mounts_for, p)) { | |
3657 | free(p); | |
3658 | return 0; | |
3659 | } | |
3660 | ||
6e18964d ZJS |
3661 | r = strv_consume(&u->requires_mounts_for, p); |
3662 | if (r < 0) | |
a57f7e2c | 3663 | return r; |
a57f7e2c LP |
3664 | |
3665 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
3666 | Set *x; | |
3667 | ||
3668 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
3669 | if (!x) { | |
3670 | char *q; | |
3671 | ||
742f41ad LP |
3672 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &string_hash_ops); |
3673 | if (r < 0) | |
3674 | return r; | |
a57f7e2c LP |
3675 | |
3676 | q = strdup(prefix); | |
3677 | if (!q) | |
3678 | return -ENOMEM; | |
3679 | ||
d5099efc | 3680 | x = set_new(NULL); |
a57f7e2c LP |
3681 | if (!x) { |
3682 | free(q); | |
3683 | return -ENOMEM; | |
3684 | } | |
3685 | ||
3686 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
3687 | if (r < 0) { | |
3688 | free(q); | |
3689 | set_free(x); | |
3690 | return r; | |
3691 | } | |
3692 | } | |
3693 | ||
3694 | r = set_put(x, u); | |
3695 | if (r < 0) | |
3696 | return r; | |
3697 | } | |
3698 | ||
3699 | return 0; | |
3700 | } | |
3701 | ||
613b411c LP |
3702 | int unit_setup_exec_runtime(Unit *u) { |
3703 | ExecRuntime **rt; | |
3704 | size_t offset; | |
3705 | Iterator i; | |
3706 | Unit *other; | |
3707 | ||
3708 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3709 | assert(offset > 0); | |
3710 | ||
06b643e7 | 3711 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
3712 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
3713 | if (*rt) | |
3714 | return 0; | |
3715 | ||
3716 | /* Try to get it from somebody else */ | |
3717 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
3718 | ||
3719 | *rt = unit_get_exec_runtime(other); | |
3720 | if (*rt) { | |
3721 | exec_runtime_ref(*rt); | |
3722 | return 0; | |
3723 | } | |
3724 | } | |
3725 | ||
3726 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
3727 | } | |
3728 | ||
1c2e9646 LP |
3729 | bool unit_type_supported(UnitType t) { |
3730 | if (_unlikely_(t < 0)) | |
3731 | return false; | |
3732 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
3733 | return false; | |
3734 | ||
3735 | if (!unit_vtable[t]->supported) | |
3736 | return true; | |
3737 | ||
3738 | return unit_vtable[t]->supported(); | |
3739 | } | |
3740 | ||
8b4305c7 LP |
3741 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
3742 | int r; | |
3743 | ||
3744 | assert(u); | |
3745 | assert(where); | |
3746 | ||
3747 | r = dir_is_empty(where); | |
3748 | if (r > 0) | |
3749 | return; | |
3750 | if (r < 0) { | |
3751 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
3752 | return; | |
3753 | } | |
3754 | ||
3755 | log_struct(LOG_NOTICE, | |
3756 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3757 | LOG_UNIT_ID(u), | |
3758 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
3759 | "WHERE=%s", where, | |
3760 | NULL); | |
3761 | } | |
3762 | ||
3763 | int unit_fail_if_symlink(Unit *u, const char* where) { | |
3764 | int r; | |
3765 | ||
3766 | assert(u); | |
3767 | assert(where); | |
3768 | ||
3769 | r = is_symlink(where); | |
3770 | if (r < 0) { | |
3771 | log_unit_debug_errno(u, r, "Failed to check symlink %s, ignoring: %m", where); | |
3772 | return 0; | |
3773 | } | |
3774 | if (r == 0) | |
3775 | return 0; | |
3776 | ||
3777 | log_struct(LOG_ERR, | |
3778 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3779 | LOG_UNIT_ID(u), | |
3780 | LOG_UNIT_MESSAGE(u, "Mount on symlink %s not allowed.", where), | |
3781 | "WHERE=%s", where, | |
3782 | NULL); | |
3783 | ||
3784 | return -ELOOP; | |
3785 | } | |
0f13f3bd LP |
3786 | |
3787 | bool unit_is_pristine(Unit *u) { | |
3788 | assert(u); | |
3789 | ||
7c65093a | 3790 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
3791 | * in a number of different ways. Note that to cater for unit |
3792 | * types such as slice, we are generally fine with units that | |
3793 | * are marked UNIT_LOADED even even though nothing was | |
3794 | * actually loaded, as those unit types don't require a file | |
3795 | * on disk to validly load. */ | |
3796 | ||
3797 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
3798 | u->fragment_path || | |
3799 | u->source_path || | |
3800 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
3801 | u->job || |
3802 | u->merged_into); | |
3803 | } |