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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
87f0e418 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
87f0e418 | 22 | #include <errno.h> |
0301abf4 | 23 | #include <stdlib.h> |
4f5dd394 | 24 | #include <string.h> |
45fb0699 | 25 | #include <sys/stat.h> |
4f5dd394 | 26 | #include <unistd.h> |
87f0e418 | 27 | |
718db961 LP |
28 | #include "sd-id128.h" |
29 | #include "sd-messages.h" | |
4f5dd394 LP |
30 | |
31 | #include "bus-common-errors.h" | |
32 | #include "bus-util.h" | |
c6c18be3 | 33 | #include "cgroup-util.h" |
4f5dd394 LP |
34 | #include "dbus-unit.h" |
35 | #include "dbus.h" | |
36 | #include "dropin.h" | |
37 | #include "escape.h" | |
38 | #include "execute.h" | |
a5c32cff | 39 | #include "fileio-label.h" |
6482f626 | 40 | #include "formats-util.h" |
4f5dd394 LP |
41 | #include "load-dropin.h" |
42 | #include "load-fragment.h" | |
43 | #include "log.h" | |
44 | #include "macro.h" | |
45 | #include "missing.h" | |
46 | #include "mkdir.h" | |
47 | #include "path-util.h" | |
0b452006 | 48 | #include "process-util.h" |
4f5dd394 | 49 | #include "set.h" |
e9db43d5 | 50 | #include "special.h" |
07630cea | 51 | #include "string-util.h" |
4f5dd394 LP |
52 | #include "strv.h" |
53 | #include "unit-name.h" | |
54 | #include "virt.h" | |
e9db43d5 | 55 | #include "unit.h" |
87f0e418 LP |
56 | |
57 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
58 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 | 59 | [UNIT_SOCKET] = &socket_vtable, |
e821075a | 60 | [UNIT_BUSNAME] = &busname_vtable, |
87f0e418 | 61 | [UNIT_TARGET] = &target_vtable, |
e821075a | 62 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
87f0e418 LP |
63 | [UNIT_DEVICE] = &device_vtable, |
64 | [UNIT_MOUNT] = &mount_vtable, | |
65 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 66 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 67 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 68 | [UNIT_PATH] = &path_vtable, |
6c12b52e LP |
69 | [UNIT_SLICE] = &slice_vtable, |
70 | [UNIT_SCOPE] = &scope_vtable | |
87f0e418 LP |
71 | }; |
72 | ||
f2341e0a | 73 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 74 | |
7d17cfbc | 75 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
76 | Unit *u; |
77 | ||
78 | assert(m); | |
ac155bb8 | 79 | assert(size >= sizeof(Unit)); |
87f0e418 | 80 | |
7d17cfbc MS |
81 | u = malloc0(size); |
82 | if (!u) | |
87f0e418 LP |
83 | return NULL; |
84 | ||
d5099efc | 85 | u->names = set_new(&string_hash_ops); |
ac155bb8 | 86 | if (!u->names) { |
87f0e418 LP |
87 | free(u); |
88 | return NULL; | |
89 | } | |
90 | ||
ac155bb8 MS |
91 | u->manager = m; |
92 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
93 | u->default_dependencies = true; |
94 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 95 | u->unit_file_preset = -1; |
d420282b | 96 | u->on_failure_job_mode = JOB_REPLACE; |
efdb0237 | 97 | u->cgroup_inotify_wd = -1; |
87f0e418 | 98 | |
67bfdc97 | 99 | RATELIMIT_INIT(u->auto_stop_ratelimit, 10 * USEC_PER_SEC, 16); |
bea355da | 100 | |
87f0e418 LP |
101 | return u; |
102 | } | |
103 | ||
f278026d LP |
104 | bool unit_has_name(Unit *u, const char *name) { |
105 | assert(u); | |
106 | assert(name); | |
107 | ||
ac155bb8 | 108 | return !!set_get(u->names, (char*) name); |
f278026d LP |
109 | } |
110 | ||
598459ce LP |
111 | static void unit_init(Unit *u) { |
112 | CGroupContext *cc; | |
113 | ExecContext *ec; | |
114 | KillContext *kc; | |
115 | ||
116 | assert(u); | |
117 | assert(u->manager); | |
118 | assert(u->type >= 0); | |
119 | ||
120 | cc = unit_get_cgroup_context(u); | |
121 | if (cc) { | |
122 | cgroup_context_init(cc); | |
123 | ||
124 | /* Copy in the manager defaults into the cgroup | |
125 | * context, _before_ the rest of the settings have | |
126 | * been initialized */ | |
127 | ||
128 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
129 | cc->blockio_accounting = u->manager->default_blockio_accounting; | |
130 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 131 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
598459ce LP |
132 | } |
133 | ||
134 | ec = unit_get_exec_context(u); | |
135 | if (ec) | |
136 | exec_context_init(ec); | |
137 | ||
138 | kc = unit_get_kill_context(u); | |
139 | if (kc) | |
140 | kill_context_init(kc); | |
141 | ||
142 | if (UNIT_VTABLE(u)->init) | |
143 | UNIT_VTABLE(u)->init(u); | |
144 | } | |
145 | ||
87f0e418 | 146 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 147 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 148 | UnitType t; |
87f0e418 LP |
149 | int r; |
150 | ||
151 | assert(u); | |
152 | assert(text); | |
153 | ||
7410616c | 154 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 155 | |
ac155bb8 | 156 | if (!u->instance) |
9e2f7c11 | 157 | return -EINVAL; |
87f0e418 | 158 | |
7410616c LP |
159 | r = unit_name_replace_instance(text, u->instance, &s); |
160 | if (r < 0) | |
161 | return r; | |
162 | } else { | |
9e2f7c11 | 163 | s = strdup(text); |
7410616c LP |
164 | if (!s) |
165 | return -ENOMEM; | |
166 | } | |
87f0e418 | 167 | |
7410616c LP |
168 | if (set_contains(u->names, s)) |
169 | return 0; | |
170 | if (hashmap_contains(u->manager->units, s)) | |
171 | return -EEXIST; | |
172 | ||
173 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 174 | return -EINVAL; |
e537352b | 175 | |
7410616c LP |
176 | t = unit_name_to_type(s); |
177 | if (t < 0) | |
178 | return -EINVAL; | |
87f0e418 | 179 | |
598459ce LP |
180 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
181 | return -EINVAL; | |
87f0e418 | 182 | |
e48614c4 ZJS |
183 | r = unit_name_to_instance(s, &i); |
184 | if (r < 0) | |
598459ce | 185 | return r; |
87f0e418 | 186 | |
598459ce LP |
187 | if (i && unit_vtable[t]->no_instances) |
188 | return -EINVAL; | |
9e2f7c11 | 189 | |
276c3e78 | 190 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
191 | * but not both. Note that we do allow names with different |
192 | * instance names however! */ | |
598459ce LP |
193 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
194 | return -EINVAL; | |
9e2f7c11 | 195 | |
7410616c | 196 | if (unit_vtable[t]->no_alias && !set_isempty(u->names)) |
598459ce | 197 | return -EEXIST; |
9e2f7c11 | 198 | |
598459ce LP |
199 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
200 | return -E2BIG; | |
4f0f902f | 201 | |
e48614c4 | 202 | r = set_put(u->names, s); |
7410616c | 203 | if (r < 0) |
598459ce | 204 | return r; |
7410616c | 205 | assert(r > 0); |
87f0e418 | 206 | |
e48614c4 ZJS |
207 | r = hashmap_put(u->manager->units, s, u); |
208 | if (r < 0) { | |
7410616c | 209 | (void) set_remove(u->names, s); |
598459ce | 210 | return r; |
87f0e418 LP |
211 | } |
212 | ||
ac155bb8 | 213 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
214 | u->type = t; |
215 | u->id = s; | |
216 | u->instance = i; | |
9e2f7c11 | 217 | |
71fda00f | 218 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 219 | |
598459ce | 220 | unit_init(u); |
87f0e418 | 221 | |
598459ce LP |
222 | i = NULL; |
223 | } | |
9e2f7c11 | 224 | |
598459ce | 225 | s = NULL; |
9e2f7c11 | 226 | |
598459ce LP |
227 | unit_add_to_dbus_queue(u); |
228 | return 0; | |
87f0e418 LP |
229 | } |
230 | ||
0ae97ec1 | 231 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 232 | _cleanup_free_ char *t = NULL; |
598459ce | 233 | char *s, *i; |
276c3e78 | 234 | int r; |
0ae97ec1 LP |
235 | |
236 | assert(u); | |
237 | assert(name); | |
238 | ||
7410616c | 239 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 240 | |
ac155bb8 | 241 | if (!u->instance) |
9e2f7c11 LP |
242 | return -EINVAL; |
243 | ||
7410616c LP |
244 | r = unit_name_replace_instance(name, u->instance, &t); |
245 | if (r < 0) | |
246 | return r; | |
9e2f7c11 LP |
247 | |
248 | name = t; | |
249 | } | |
250 | ||
0ae97ec1 | 251 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 252 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 253 | if (!s) |
0ae97ec1 LP |
254 | return -ENOENT; |
255 | ||
7410616c | 256 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
257 | r = unit_name_to_instance(s, &i); |
258 | if (r < 0) | |
276c3e78 LP |
259 | return r; |
260 | ||
ac155bb8 | 261 | u->id = s; |
276c3e78 | 262 | |
ac155bb8 MS |
263 | free(u->instance); |
264 | u->instance = i; | |
276c3e78 | 265 | |
c1e1601e | 266 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 267 | |
0ae97ec1 LP |
268 | return 0; |
269 | } | |
270 | ||
f50e0a01 LP |
271 | int unit_set_description(Unit *u, const char *description) { |
272 | char *s; | |
273 | ||
274 | assert(u); | |
275 | ||
8aec412f LP |
276 | if (isempty(description)) |
277 | s = NULL; | |
278 | else { | |
279 | s = strdup(description); | |
280 | if (!s) | |
281 | return -ENOMEM; | |
282 | } | |
f50e0a01 | 283 | |
ac155bb8 MS |
284 | free(u->description); |
285 | u->description = s; | |
c1e1601e LP |
286 | |
287 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
288 | return 0; |
289 | } | |
290 | ||
701cc384 | 291 | bool unit_check_gc(Unit *u) { |
a354329f | 292 | UnitActiveState state; |
701cc384 LP |
293 | assert(u); |
294 | ||
a354329f | 295 | if (u->job) |
701cc384 LP |
296 | return true; |
297 | ||
a354329f | 298 | if (u->nop_job) |
6c073082 LP |
299 | return true; |
300 | ||
a354329f LP |
301 | state = unit_active_state(u); |
302 | ||
303 | /* If the unit is inactive and failed and no job is queued for | |
304 | * it, then release its runtime resources */ | |
305 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && | |
306 | UNIT_VTABLE(u)->release_resources) | |
307 | UNIT_VTABLE(u)->release_resources(u); | |
308 | ||
309 | /* But we keep the unit object around for longer when it is | |
310 | * referenced or configured to not be gc'ed */ | |
311 | if (state != UNIT_INACTIVE) | |
701cc384 LP |
312 | return true; |
313 | ||
a354329f | 314 | if (UNIT_VTABLE(u)->no_gc) |
e0209d83 MS |
315 | return true; |
316 | ||
a354329f | 317 | if (u->no_gc) |
701cc384 LP |
318 | return true; |
319 | ||
9d576438 LP |
320 | if (u->refs) |
321 | return true; | |
322 | ||
701cc384 LP |
323 | if (UNIT_VTABLE(u)->check_gc) |
324 | if (UNIT_VTABLE(u)->check_gc(u)) | |
325 | return true; | |
326 | ||
327 | return false; | |
328 | } | |
329 | ||
87f0e418 LP |
330 | void unit_add_to_load_queue(Unit *u) { |
331 | assert(u); | |
ac155bb8 | 332 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 333 | |
ac155bb8 | 334 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
335 | return; |
336 | ||
71fda00f | 337 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 338 | u->in_load_queue = true; |
87f0e418 LP |
339 | } |
340 | ||
23a177ef LP |
341 | void unit_add_to_cleanup_queue(Unit *u) { |
342 | assert(u); | |
343 | ||
ac155bb8 | 344 | if (u->in_cleanup_queue) |
23a177ef LP |
345 | return; |
346 | ||
71fda00f | 347 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 348 | u->in_cleanup_queue = true; |
23a177ef LP |
349 | } |
350 | ||
701cc384 LP |
351 | void unit_add_to_gc_queue(Unit *u) { |
352 | assert(u); | |
353 | ||
ac155bb8 | 354 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
355 | return; |
356 | ||
357 | if (unit_check_gc(u)) | |
358 | return; | |
359 | ||
71fda00f | 360 | LIST_PREPEND(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 361 | u->in_gc_queue = true; |
701cc384 | 362 | |
ac155bb8 | 363 | u->manager->n_in_gc_queue ++; |
701cc384 LP |
364 | } |
365 | ||
c1e1601e LP |
366 | void unit_add_to_dbus_queue(Unit *u) { |
367 | assert(u); | |
ac155bb8 | 368 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 369 | |
ac155bb8 | 370 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
371 | return; |
372 | ||
a567261a | 373 | /* Shortcut things if nobody cares */ |
8f8f05a9 LP |
374 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
375 | set_isempty(u->manager->private_buses)) { | |
ac155bb8 | 376 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
377 | return; |
378 | } | |
379 | ||
71fda00f | 380 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 381 | u->in_dbus_queue = true; |
c1e1601e LP |
382 | } |
383 | ||
87f0e418 LP |
384 | static void bidi_set_free(Unit *u, Set *s) { |
385 | Iterator i; | |
386 | Unit *other; | |
387 | ||
388 | assert(u); | |
389 | ||
390 | /* Frees the set and makes sure we are dropped from the | |
391 | * inverse pointers */ | |
392 | ||
393 | SET_FOREACH(other, s, i) { | |
394 | UnitDependency d; | |
395 | ||
396 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 397 | set_remove(other->dependencies[d], u); |
701cc384 LP |
398 | |
399 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
400 | } |
401 | ||
402 | set_free(s); | |
403 | } | |
404 | ||
c2756a68 LP |
405 | static void unit_remove_transient(Unit *u) { |
406 | char **i; | |
407 | ||
408 | assert(u); | |
409 | ||
410 | if (!u->transient) | |
411 | return; | |
412 | ||
413 | if (u->fragment_path) | |
3f5e8115 | 414 | (void) unlink(u->fragment_path); |
c2756a68 LP |
415 | |
416 | STRV_FOREACH(i, u->dropin_paths) { | |
417 | _cleanup_free_ char *p = NULL; | |
418 | int r; | |
419 | ||
3f5e8115 | 420 | (void) unlink(*i); |
c2756a68 LP |
421 | |
422 | r = path_get_parent(*i, &p); | |
423 | if (r >= 0) | |
3f5e8115 | 424 | (void) rmdir(p); |
c2756a68 LP |
425 | } |
426 | } | |
427 | ||
a57f7e2c LP |
428 | static void unit_free_requires_mounts_for(Unit *u) { |
429 | char **j; | |
430 | ||
431 | STRV_FOREACH(j, u->requires_mounts_for) { | |
432 | char s[strlen(*j) + 1]; | |
433 | ||
434 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
435 | char *y; | |
436 | Set *x; | |
437 | ||
438 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
439 | if (!x) | |
440 | continue; | |
441 | ||
442 | set_remove(x, u); | |
443 | ||
444 | if (set_isempty(x)) { | |
445 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
446 | free(y); | |
447 | set_free(x); | |
448 | } | |
449 | } | |
450 | } | |
451 | ||
6796073e | 452 | u->requires_mounts_for = strv_free(u->requires_mounts_for); |
a57f7e2c LP |
453 | } |
454 | ||
598459ce LP |
455 | static void unit_done(Unit *u) { |
456 | ExecContext *ec; | |
457 | CGroupContext *cc; | |
32ee7d33 | 458 | int r; |
598459ce LP |
459 | |
460 | assert(u); | |
461 | ||
462 | if (u->type < 0) | |
463 | return; | |
464 | ||
465 | if (UNIT_VTABLE(u)->done) | |
466 | UNIT_VTABLE(u)->done(u); | |
467 | ||
468 | ec = unit_get_exec_context(u); | |
469 | if (ec) | |
470 | exec_context_done(ec); | |
471 | ||
472 | cc = unit_get_cgroup_context(u); | |
473 | if (cc) | |
474 | cgroup_context_done(cc); | |
32ee7d33 DM |
475 | |
476 | r = unit_remove_from_netclass_cgroup(u); | |
477 | if (r < 0) | |
478 | log_warning_errno(r, "Unable to remove unit from netclass group: %m"); | |
598459ce LP |
479 | } |
480 | ||
87f0e418 LP |
481 | void unit_free(Unit *u) { |
482 | UnitDependency d; | |
483 | Iterator i; | |
484 | char *t; | |
485 | ||
486 | assert(u); | |
487 | ||
c2756a68 LP |
488 | if (u->manager->n_reloading <= 0) |
489 | unit_remove_transient(u); | |
490 | ||
c1e1601e LP |
491 | bus_unit_send_removed_signal(u); |
492 | ||
598459ce | 493 | unit_done(u); |
a013b84b | 494 | |
cf9fd508 DM |
495 | sd_bus_slot_unref(u->match_bus_slot); |
496 | ||
a57f7e2c LP |
497 | unit_free_requires_mounts_for(u); |
498 | ||
ac155bb8 MS |
499 | SET_FOREACH(t, u->names, i) |
500 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 501 | |
97e7d748 MS |
502 | if (u->job) { |
503 | Job *j = u->job; | |
504 | job_uninstall(j); | |
505 | job_free(j); | |
506 | } | |
964e0949 | 507 | |
e0209d83 MS |
508 | if (u->nop_job) { |
509 | Job *j = u->nop_job; | |
510 | job_uninstall(j); | |
511 | job_free(j); | |
512 | } | |
513 | ||
964e0949 | 514 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 515 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 516 | |
ac155bb8 | 517 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 518 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 519 | |
ac155bb8 | 520 | if (u->in_load_queue) |
71fda00f | 521 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 522 | |
ac155bb8 | 523 | if (u->in_dbus_queue) |
71fda00f | 524 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 525 | |
ac155bb8 | 526 | if (u->in_cleanup_queue) |
71fda00f | 527 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 528 | |
ac155bb8 | 529 | if (u->in_gc_queue) { |
71fda00f | 530 | LIST_REMOVE(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 531 | u->manager->n_in_gc_queue--; |
701cc384 LP |
532 | } |
533 | ||
4ad49000 | 534 | if (u->in_cgroup_queue) |
71fda00f | 535 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
87f0e418 | 536 | |
efdb0237 | 537 | unit_release_cgroup(u); |
72673e86 | 538 | |
5269eb6b | 539 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 540 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 541 | |
ac155bb8 | 542 | free(u->description); |
49dbfa7b | 543 | strv_free(u->documentation); |
ac155bb8 | 544 | free(u->fragment_path); |
1b64d026 | 545 | free(u->source_path); |
ae7a7182 | 546 | strv_free(u->dropin_paths); |
ac155bb8 | 547 | free(u->instance); |
87f0e418 | 548 | |
f189ab18 LP |
549 | free(u->job_timeout_reboot_arg); |
550 | ||
ac155bb8 | 551 | set_free_free(u->names); |
87f0e418 | 552 | |
a911bb9a LP |
553 | unit_unwatch_all_pids(u); |
554 | ||
ac155bb8 | 555 | condition_free_list(u->conditions); |
59fccdc5 | 556 | condition_free_list(u->asserts); |
52661efd | 557 | |
702a2d8f LP |
558 | unit_ref_unset(&u->slice); |
559 | ||
ac155bb8 MS |
560 | while (u->refs) |
561 | unit_ref_unset(u->refs); | |
57020a3a | 562 | |
87f0e418 LP |
563 | free(u); |
564 | } | |
565 | ||
566 | UnitActiveState unit_active_state(Unit *u) { | |
567 | assert(u); | |
568 | ||
ac155bb8 | 569 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
570 | return unit_active_state(unit_follow_merge(u)); |
571 | ||
572 | /* After a reload it might happen that a unit is not correctly | |
573 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 574 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
575 | |
576 | return UNIT_VTABLE(u)->active_state(u); | |
577 | } | |
578 | ||
10a94420 LP |
579 | const char* unit_sub_state_to_string(Unit *u) { |
580 | assert(u); | |
581 | ||
582 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
583 | } | |
584 | ||
7c0b05e5 MS |
585 | static int complete_move(Set **s, Set **other) { |
586 | int r; | |
587 | ||
23a177ef LP |
588 | assert(s); |
589 | assert(other); | |
87f0e418 | 590 | |
23a177ef | 591 | if (!*other) |
7c0b05e5 | 592 | return 0; |
87f0e418 | 593 | |
7c0b05e5 MS |
594 | if (*s) { |
595 | r = set_move(*s, *other); | |
596 | if (r < 0) | |
597 | return r; | |
598 | } else { | |
23a177ef LP |
599 | *s = *other; |
600 | *other = NULL; | |
601 | } | |
7c0b05e5 MS |
602 | |
603 | return 0; | |
23a177ef | 604 | } |
87f0e418 | 605 | |
7c0b05e5 | 606 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
607 | char *t; |
608 | Iterator i; | |
7c0b05e5 | 609 | int r; |
87f0e418 | 610 | |
23a177ef LP |
611 | assert(u); |
612 | assert(other); | |
613 | ||
7c0b05e5 MS |
614 | r = complete_move(&u->names, &other->names); |
615 | if (r < 0) | |
616 | return r; | |
23a177ef | 617 | |
ac155bb8 MS |
618 | set_free_free(other->names); |
619 | other->names = NULL; | |
620 | other->id = NULL; | |
23a177ef | 621 | |
ac155bb8 MS |
622 | SET_FOREACH(t, u->names, i) |
623 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
624 | |
625 | return 0; | |
87f0e418 LP |
626 | } |
627 | ||
09a65f92 MS |
628 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
629 | unsigned n_reserve; | |
630 | ||
631 | assert(u); | |
632 | assert(other); | |
633 | assert(d < _UNIT_DEPENDENCY_MAX); | |
634 | ||
635 | /* | |
636 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 637 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
638 | * as a whole to u by complete_move(). |
639 | */ | |
640 | if (!u->dependencies[d]) | |
641 | return 0; | |
642 | ||
643 | /* merge_dependencies() will skip a u-on-u dependency */ | |
644 | n_reserve = set_size(other->dependencies[d]) - !!set_get(other->dependencies[d], u); | |
645 | ||
646 | return set_reserve(u->dependencies[d], n_reserve); | |
647 | } | |
648 | ||
d1fab3fe | 649 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
650 | Iterator i; |
651 | Unit *back; | |
87f0e418 | 652 | int r; |
23a177ef LP |
653 | |
654 | assert(u); | |
655 | assert(other); | |
656 | assert(d < _UNIT_DEPENDENCY_MAX); | |
657 | ||
83a95334 | 658 | /* Fix backwards pointers */ |
ac155bb8 | 659 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
660 | UnitDependency k; |
661 | ||
e48614c4 | 662 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff ZJS |
663 | /* Do not add dependencies between u and itself */ |
664 | if (back == u) { | |
d1fab3fe | 665 | if (set_remove(back->dependencies[k], other)) |
f2341e0a | 666 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff ZJS |
667 | } else { |
668 | r = set_remove_and_put(back->dependencies[k], other, u); | |
669 | if (r == -EEXIST) | |
670 | set_remove(back->dependencies[k], other); | |
671 | else | |
672 | assert(r >= 0 || r == -ENOENT); | |
673 | } | |
e48614c4 | 674 | } |
23a177ef LP |
675 | } |
676 | ||
e66047ff | 677 | /* Also do not move dependencies on u to itself */ |
d1fab3fe ZJS |
678 | back = set_remove(other->dependencies[d], u); |
679 | if (back) | |
f2341e0a | 680 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 681 | |
7c0b05e5 MS |
682 | /* The move cannot fail. The caller must have performed a reservation. */ |
683 | assert_se(complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); | |
23a177ef | 684 | |
525d3cc7 | 685 | other->dependencies[d] = set_free(other->dependencies[d]); |
23a177ef LP |
686 | } |
687 | ||
688 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 689 | UnitDependency d; |
d1fab3fe | 690 | const char *other_id = NULL; |
09a65f92 | 691 | int r; |
87f0e418 LP |
692 | |
693 | assert(u); | |
694 | assert(other); | |
ac155bb8 MS |
695 | assert(u->manager == other->manager); |
696 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 697 | |
cc916967 LP |
698 | other = unit_follow_merge(other); |
699 | ||
23a177ef LP |
700 | if (other == u) |
701 | return 0; | |
702 | ||
ac155bb8 | 703 | if (u->type != other->type) |
9e2f7c11 LP |
704 | return -EINVAL; |
705 | ||
ac155bb8 | 706 | if (!u->instance != !other->instance) |
87f0e418 LP |
707 | return -EINVAL; |
708 | ||
ac155bb8 | 709 | if (other->load_state != UNIT_STUB && |
c2756a68 | 710 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 711 | return -EEXIST; |
87f0e418 | 712 | |
ac155bb8 | 713 | if (other->job) |
819e213f LP |
714 | return -EEXIST; |
715 | ||
e0209d83 MS |
716 | if (other->nop_job) |
717 | return -EEXIST; | |
718 | ||
fdf20a31 | 719 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
720 | return -EEXIST; |
721 | ||
d1fab3fe ZJS |
722 | if (other->id) |
723 | other_id = strdupa(other->id); | |
724 | ||
09a65f92 MS |
725 | /* Make reservations to ensure merge_dependencies() won't fail */ |
726 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
727 | r = reserve_dependencies(u, other, d); | |
728 | /* | |
729 | * We don't rollback reservations if we fail. We don't have | |
730 | * a way to undo reservations. A reservation is not a leak. | |
731 | */ | |
732 | if (r < 0) | |
733 | return r; | |
734 | } | |
735 | ||
87f0e418 | 736 | /* Merge names */ |
7c0b05e5 MS |
737 | r = merge_names(u, other); |
738 | if (r < 0) | |
739 | return r; | |
87f0e418 | 740 | |
57020a3a | 741 | /* Redirect all references */ |
ac155bb8 MS |
742 | while (other->refs) |
743 | unit_ref_set(other->refs, u); | |
57020a3a | 744 | |
87f0e418 LP |
745 | /* Merge dependencies */ |
746 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 747 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 748 | |
ac155bb8 MS |
749 | other->load_state = UNIT_MERGED; |
750 | other->merged_into = u; | |
23a177ef | 751 | |
3616a49c LP |
752 | /* If there is still some data attached to the other node, we |
753 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 754 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
755 | if (UNIT_VTABLE(other)->done) |
756 | UNIT_VTABLE(other)->done(other); | |
757 | ||
758 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
759 | unit_add_to_cleanup_queue(other); |
760 | ||
761 | return 0; | |
762 | } | |
763 | ||
764 | int unit_merge_by_name(Unit *u, const char *name) { | |
765 | Unit *other; | |
9e2f7c11 | 766 | int r; |
68eda4bd | 767 | _cleanup_free_ char *s = NULL; |
23a177ef LP |
768 | |
769 | assert(u); | |
770 | assert(name); | |
771 | ||
7410616c | 772 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 773 | if (!u->instance) |
9e2f7c11 LP |
774 | return -EINVAL; |
775 | ||
7410616c LP |
776 | r = unit_name_replace_instance(name, u->instance, &s); |
777 | if (r < 0) | |
778 | return r; | |
9e2f7c11 LP |
779 | |
780 | name = s; | |
781 | } | |
782 | ||
c2756a68 | 783 | other = manager_get_unit(u->manager, name); |
7410616c LP |
784 | if (other) |
785 | return unit_merge(u, other); | |
23a177ef | 786 | |
7410616c | 787 | return unit_add_name(u, name); |
23a177ef LP |
788 | } |
789 | ||
790 | Unit* unit_follow_merge(Unit *u) { | |
791 | assert(u); | |
792 | ||
ac155bb8 MS |
793 | while (u->load_state == UNIT_MERGED) |
794 | assert_se(u = u->merged_into); | |
23a177ef LP |
795 | |
796 | return u; | |
797 | } | |
798 | ||
799 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
800 | int r; | |
801 | ||
802 | assert(u); | |
803 | assert(c); | |
804 | ||
36be24c8 ZJS |
805 | if (c->working_directory) { |
806 | r = unit_require_mounts_for(u, c->working_directory); | |
807 | if (r < 0) | |
808 | return r; | |
809 | } | |
810 | ||
811 | if (c->root_directory) { | |
812 | r = unit_require_mounts_for(u, c->root_directory); | |
813 | if (r < 0) | |
814 | return r; | |
815 | } | |
816 | ||
b2c23da8 | 817 | if (u->manager->running_as != MANAGER_SYSTEM) |
b46a529c LP |
818 | return 0; |
819 | ||
820 | if (c->private_tmp) { | |
821 | r = unit_require_mounts_for(u, "/tmp"); | |
822 | if (r < 0) | |
823 | return r; | |
824 | ||
825 | r = unit_require_mounts_for(u, "/var/tmp"); | |
826 | if (r < 0) | |
827 | return r; | |
828 | } | |
829 | ||
ecc6e2b8 LP |
830 | if (c->std_output != EXEC_OUTPUT_KMSG && |
831 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 832 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
833 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
834 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 835 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 836 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 837 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 838 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 839 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 840 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 841 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
842 | return 0; |
843 | ||
844 | /* If syslog or kernel logging is requested, make sure our own | |
845 | * logging daemon is run first. */ | |
846 | ||
b46a529c LP |
847 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); |
848 | if (r < 0) | |
849 | return r; | |
23a177ef | 850 | |
87f0e418 LP |
851 | return 0; |
852 | } | |
853 | ||
87f0e418 LP |
854 | const char *unit_description(Unit *u) { |
855 | assert(u); | |
856 | ||
ac155bb8 MS |
857 | if (u->description) |
858 | return u->description; | |
87f0e418 | 859 | |
ac155bb8 | 860 | return strna(u->id); |
87f0e418 LP |
861 | } |
862 | ||
863 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 864 | char *t, **j; |
87f0e418 LP |
865 | UnitDependency d; |
866 | Iterator i; | |
47be870b | 867 | const char *prefix2; |
173e3821 LP |
868 | char |
869 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
870 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
871 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
872 | timestamp4[FORMAT_TIMESTAMP_MAX], |
873 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 874 | Unit *following; |
eeaedb7c LP |
875 | _cleanup_set_free_ Set *following_set = NULL; |
876 | int r; | |
87f0e418 LP |
877 | |
878 | assert(u); | |
ac155bb8 | 879 | assert(u->type >= 0); |
87f0e418 | 880 | |
4c940960 | 881 | prefix = strempty(prefix); |
63c372cb | 882 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
883 | |
884 | fprintf(f, | |
40d50879 | 885 | "%s-> Unit %s:\n" |
87f0e418 | 886 | "%s\tDescription: %s\n" |
9e2f7c11 | 887 | "%s\tInstance: %s\n" |
87f0e418 | 888 | "%s\tUnit Load State: %s\n" |
2fad8195 | 889 | "%s\tUnit Active State: %s\n" |
173e3821 | 890 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 891 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 892 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 893 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 894 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 895 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 896 | "%s\tTransient: %s\n" |
4ad49000 LP |
897 | "%s\tSlice: %s\n" |
898 | "%s\tCGroup: %s\n" | |
899 | "%s\tCGroup realized: %s\n" | |
6414b7c9 DS |
900 | "%s\tCGroup mask: 0x%x\n" |
901 | "%s\tCGroup members mask: 0x%x\n", | |
ac155bb8 | 902 | prefix, u->id, |
87f0e418 | 903 | prefix, unit_description(u), |
ac155bb8 MS |
904 | prefix, strna(u->instance), |
905 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 906 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
907 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
908 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
909 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
910 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 911 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 912 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 913 | prefix, yes_no(u->transient), |
4ad49000 LP |
914 | prefix, strna(unit_slice_name(u)), |
915 | prefix, strna(u->cgroup_path), | |
916 | prefix, yes_no(u->cgroup_realized), | |
bc432dc7 | 917 | prefix, u->cgroup_realized_mask, |
6414b7c9 | 918 | prefix, u->cgroup_members_mask); |
0301abf4 | 919 | |
ac155bb8 | 920 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
921 | fprintf(f, "%s\tName: %s\n", prefix, t); |
922 | ||
49dbfa7b LP |
923 | STRV_FOREACH(j, u->documentation) |
924 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
925 | ||
eeaedb7c LP |
926 | following = unit_following(u); |
927 | if (following) | |
ac155bb8 | 928 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 929 | |
eeaedb7c LP |
930 | r = unit_following_set(u, &following_set); |
931 | if (r >= 0) { | |
932 | Unit *other; | |
933 | ||
934 | SET_FOREACH(other, following_set, i) | |
935 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
936 | } | |
937 | ||
ac155bb8 MS |
938 | if (u->fragment_path) |
939 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 940 | |
1b64d026 LP |
941 | if (u->source_path) |
942 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
943 | ||
ae7a7182 | 944 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 945 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 946 | |
ac155bb8 | 947 | if (u->job_timeout > 0) |
2fa4092c | 948 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 949 | |
f189ab18 LP |
950 | if (u->job_timeout_action != FAILURE_ACTION_NONE) |
951 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, failure_action_to_string(u->job_timeout_action)); | |
952 | ||
953 | if (u->job_timeout_reboot_arg) | |
954 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
955 | ||
59fccdc5 LP |
956 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
957 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 958 | |
ac155bb8 | 959 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
960 | fprintf(f, |
961 | "%s\tCondition Timestamp: %s\n" | |
962 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
963 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
964 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 965 | |
59fccdc5 LP |
966 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
967 | fprintf(f, | |
968 | "%s\tAssert Timestamp: %s\n" | |
969 | "%s\tAssert Result: %s\n", | |
970 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
971 | prefix, yes_no(u->assert_result)); | |
972 | ||
87f0e418 LP |
973 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
974 | Unit *other; | |
975 | ||
ac155bb8 MS |
976 | SET_FOREACH(other, u->dependencies[d], i) |
977 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
978 | } |
979 | ||
7c8fa05c | 980 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
981 | fprintf(f, |
982 | "%s\tRequiresMountsFor:", prefix); | |
983 | ||
984 | STRV_FOREACH(j, u->requires_mounts_for) | |
985 | fprintf(f, " %s", *j); | |
986 | ||
987 | fputs("\n", f); | |
988 | } | |
989 | ||
ac155bb8 | 990 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 991 | |
b0650475 | 992 | fprintf(f, |
a40eb732 | 993 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
994 | "%s\tRefuseManualStart: %s\n" |
995 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 996 | "%s\tDefaultDependencies: %s\n" |
d420282b | 997 | "%s\tOnFailureJobMode: %s\n" |
7a6000a6 LP |
998 | "%s\tIgnoreOnIsolate: %s\n" |
999 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
1000 | prefix, yes_no(u->stop_when_unneeded), |
1001 | prefix, yes_no(u->refuse_manual_start), | |
1002 | prefix, yes_no(u->refuse_manual_stop), | |
1003 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1004 | prefix, job_mode_to_string(u->on_failure_job_mode), |
ac155bb8 MS |
1005 | prefix, yes_no(u->ignore_on_isolate), |
1006 | prefix, yes_no(u->ignore_on_snapshot)); | |
1007 | ||
23a177ef LP |
1008 | if (UNIT_VTABLE(u)->dump) |
1009 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1010 | |
ac155bb8 | 1011 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1012 | fprintf(f, |
1013 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1014 | prefix, u->merged_into->id); |
1015 | else if (u->load_state == UNIT_ERROR) | |
1016 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 1017 | |
87f0e418 | 1018 | |
ac155bb8 MS |
1019 | if (u->job) |
1020 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1021 | |
e0209d83 MS |
1022 | if (u->nop_job) |
1023 | job_dump(u->nop_job, f, prefix2); | |
1024 | ||
87f0e418 LP |
1025 | } |
1026 | ||
1027 | /* Common implementation for multiple backends */ | |
e537352b | 1028 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1029 | int r; |
1030 | ||
1031 | assert(u); | |
23a177ef | 1032 | |
e48614c4 | 1033 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1034 | r = unit_load_fragment(u); |
1035 | if (r < 0) | |
23a177ef LP |
1036 | return r; |
1037 | ||
ac155bb8 | 1038 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1039 | return -ENOENT; |
1040 | ||
1041 | /* Load drop-in directory data */ | |
4ad49000 LP |
1042 | r = unit_load_dropin(unit_follow_merge(u)); |
1043 | if (r < 0) | |
23a177ef LP |
1044 | return r; |
1045 | ||
1046 | return 0; | |
1047 | } | |
1048 | ||
1049 | /* Common implementation for multiple backends */ | |
e537352b | 1050 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1051 | int r; |
87f0e418 LP |
1052 | |
1053 | assert(u); | |
1054 | ||
23a177ef LP |
1055 | /* Same as unit_load_fragment_and_dropin(), but whether |
1056 | * something can be loaded or not doesn't matter. */ | |
1057 | ||
1058 | /* Load a .service file */ | |
4ad49000 LP |
1059 | r = unit_load_fragment(u); |
1060 | if (r < 0) | |
87f0e418 LP |
1061 | return r; |
1062 | ||
ac155bb8 MS |
1063 | if (u->load_state == UNIT_STUB) |
1064 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1065 | |
87f0e418 | 1066 | /* Load drop-in directory data */ |
4ad49000 LP |
1067 | r = unit_load_dropin(unit_follow_merge(u)); |
1068 | if (r < 0) | |
87f0e418 LP |
1069 | return r; |
1070 | ||
23a177ef | 1071 | return 0; |
87f0e418 LP |
1072 | } |
1073 | ||
bba34eed | 1074 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1075 | assert(u); |
1076 | assert(target); | |
1077 | ||
ac155bb8 | 1078 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1079 | return 0; |
1080 | ||
35b8ca3a | 1081 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1082 | * that loop check below is reliable */ |
ac155bb8 MS |
1083 | if (u->load_state != UNIT_LOADED || |
1084 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1085 | return 0; |
1086 | ||
21256a2b LP |
1087 | /* If either side wants no automatic dependencies, then let's |
1088 | * skip this */ | |
ac155bb8 MS |
1089 | if (!u->default_dependencies || |
1090 | !target->default_dependencies) | |
21256a2b LP |
1091 | return 0; |
1092 | ||
98bc2000 | 1093 | /* Don't create loops */ |
ac155bb8 | 1094 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1095 | return 0; |
1096 | ||
1097 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
1098 | } | |
1099 | ||
e954c9cf | 1100 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 1101 | |
21256a2b LP |
1102 | static const UnitDependency deps[] = { |
1103 | UNIT_REQUIRED_BY, | |
1104 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
be7d9ff7 LP |
1105 | UNIT_REQUISITE_OF, |
1106 | UNIT_REQUISITE_OF_OVERRIDABLE, | |
21256a2b LP |
1107 | UNIT_WANTED_BY, |
1108 | UNIT_BOUND_BY | |
1109 | }; | |
1110 | ||
bba34eed | 1111 | Unit *target; |
98bc2000 | 1112 | Iterator i; |
21256a2b | 1113 | unsigned k; |
db57f3c6 | 1114 | int r = 0; |
98bc2000 LP |
1115 | |
1116 | assert(u); | |
1117 | ||
21256a2b | 1118 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
1119 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
1120 | r = unit_add_default_target_dependency(u, target); | |
1121 | if (r < 0) | |
21256a2b | 1122 | return r; |
a016b922 LP |
1123 | } |
1124 | ||
e954c9cf LP |
1125 | return r; |
1126 | } | |
4ad49000 | 1127 | |
e954c9cf LP |
1128 | static int unit_add_slice_dependencies(Unit *u) { |
1129 | assert(u); | |
b81884e7 | 1130 | |
35b7ff80 | 1131 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1132 | return 0; |
1133 | ||
1134 | if (UNIT_ISSET(u->slice)) | |
8c8da0e0 | 1135 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true); |
e954c9cf | 1136 | |
8c8da0e0 | 1137 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1138 | return 0; |
1139 | ||
8c8da0e0 | 1140 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, NULL, true); |
98bc2000 LP |
1141 | } |
1142 | ||
e954c9cf | 1143 | static int unit_add_mount_dependencies(Unit *u) { |
9588bc32 LP |
1144 | char **i; |
1145 | int r; | |
1146 | ||
1147 | assert(u); | |
1148 | ||
1149 | STRV_FOREACH(i, u->requires_mounts_for) { | |
1150 | char prefix[strlen(*i) + 1]; | |
1151 | ||
1152 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
c7c89abb | 1153 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1154 | Unit *m; |
1155 | ||
c7c89abb | 1156 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1157 | if (r < 0) |
1158 | return r; | |
c7c89abb FB |
1159 | |
1160 | m = manager_get_unit(u->manager, p); | |
1161 | if (!m) { | |
1162 | /* Make sure to load the mount unit if | |
1163 | * it exists. If so the dependencies | |
1164 | * on this unit will be added later | |
1165 | * during the loading of the mount | |
1166 | * unit. */ | |
1167 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1168 | continue; |
c7c89abb | 1169 | } |
9588bc32 LP |
1170 | if (m == u) |
1171 | continue; | |
1172 | ||
1173 | if (m->load_state != UNIT_LOADED) | |
1174 | continue; | |
1175 | ||
1176 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1177 | if (r < 0) | |
1178 | return r; | |
1179 | ||
1180 | if (m->fragment_path) { | |
1181 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1182 | if (r < 0) | |
1183 | return r; | |
1184 | } | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | return 0; | |
1189 | } | |
1190 | ||
95ae05c0 WC |
1191 | static int unit_add_startup_units(Unit *u) { |
1192 | CGroupContext *c; | |
5269eb6b | 1193 | int r; |
95ae05c0 WC |
1194 | |
1195 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1196 | if (!c) |
1197 | return 0; | |
1198 | ||
d53d9474 LP |
1199 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
1200 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) | |
db785129 LP |
1201 | return 0; |
1202 | ||
5269eb6b LP |
1203 | r = set_ensure_allocated(&u->manager->startup_units, NULL); |
1204 | if (r < 0) | |
1205 | return r; | |
1206 | ||
756c09e6 | 1207 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1208 | } |
1209 | ||
87f0e418 LP |
1210 | int unit_load(Unit *u) { |
1211 | int r; | |
1212 | ||
1213 | assert(u); | |
1214 | ||
ac155bb8 | 1215 | if (u->in_load_queue) { |
71fda00f | 1216 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1217 | u->in_load_queue = false; |
87f0e418 LP |
1218 | } |
1219 | ||
ac155bb8 | 1220 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1221 | return -EINVAL; |
1222 | ||
ac155bb8 | 1223 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1224 | return 0; |
1225 | ||
c2756a68 LP |
1226 | if (UNIT_VTABLE(u)->load) { |
1227 | r = UNIT_VTABLE(u)->load(u); | |
1228 | if (r < 0) | |
87f0e418 | 1229 | goto fail; |
c2756a68 | 1230 | } |
23a177ef | 1231 | |
ac155bb8 | 1232 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1233 | r = -ENOENT; |
1234 | goto fail; | |
1235 | } | |
1236 | ||
7c8fa05c | 1237 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1238 | |
e954c9cf LP |
1239 | r = unit_add_target_dependencies(u); |
1240 | if (r < 0) | |
1241 | goto fail; | |
1242 | ||
1243 | r = unit_add_slice_dependencies(u); | |
1244 | if (r < 0) | |
1245 | goto fail; | |
c2756a68 | 1246 | |
e954c9cf | 1247 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1248 | if (r < 0) |
c2756a68 | 1249 | goto fail; |
7c8fa05c | 1250 | |
95ae05c0 WC |
1251 | r = unit_add_startup_units(u); |
1252 | if (r < 0) | |
1253 | goto fail; | |
1254 | ||
bc432dc7 | 1255 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1256 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
c2756a68 LP |
1257 | r = -EINVAL; |
1258 | goto fail; | |
1259 | } | |
bc432dc7 LP |
1260 | |
1261 | unit_update_cgroup_members_masks(u); | |
32ee7d33 DM |
1262 | |
1263 | /* If we are reloading, we need to wait for the deserializer | |
1264 | * to restore the net_cls ids that have been set previously */ | |
1265 | if (u->manager->n_reloading <= 0) { | |
1266 | r = unit_add_to_netclass_cgroup(u); | |
1267 | if (r < 0) | |
1268 | return r; | |
1269 | } | |
f68319bb LP |
1270 | } |
1271 | ||
ac155bb8 | 1272 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1273 | |
1274 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1275 | unit_add_to_gc_queue(u); |
87f0e418 | 1276 | |
87f0e418 LP |
1277 | return 0; |
1278 | ||
1279 | fail: | |
c2756a68 | 1280 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1281 | u->load_error = r; |
c1e1601e | 1282 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1283 | unit_add_to_gc_queue(u); |
23a177ef | 1284 | |
f2341e0a | 1285 | log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
23a177ef | 1286 | |
87f0e418 LP |
1287 | return r; |
1288 | } | |
1289 | ||
49365733 LP |
1290 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1291 | Condition *c; | |
1292 | int triggered = -1; | |
1293 | ||
1294 | assert(u); | |
1295 | assert(to_string); | |
1296 | ||
1297 | /* If the condition list is empty, then it is true */ | |
1298 | if (!first) | |
1299 | return true; | |
1300 | ||
1301 | /* Otherwise, if all of the non-trigger conditions apply and | |
1302 | * if any of the trigger conditions apply (unless there are | |
1303 | * none) we return true */ | |
1304 | LIST_FOREACH(conditions, c, first) { | |
1305 | int r; | |
1306 | ||
1307 | r = condition_test(c); | |
1308 | if (r < 0) | |
f2341e0a LP |
1309 | log_unit_warning(u, |
1310 | "Couldn't determine result for %s=%s%s%s, assuming failed: %m", | |
49365733 LP |
1311 | to_string(c->type), |
1312 | c->trigger ? "|" : "", | |
1313 | c->negate ? "!" : "", | |
f2341e0a | 1314 | c->parameter); |
49365733 | 1315 | else |
f2341e0a LP |
1316 | log_unit_debug(u, |
1317 | "%s=%s%s%s %s.", | |
49365733 LP |
1318 | to_string(c->type), |
1319 | c->trigger ? "|" : "", | |
1320 | c->negate ? "!" : "", | |
1321 | c->parameter, | |
f2341e0a | 1322 | condition_result_to_string(c->result)); |
49365733 LP |
1323 | |
1324 | if (!c->trigger && r <= 0) | |
1325 | return false; | |
1326 | ||
1327 | if (c->trigger && triggered <= 0) | |
1328 | triggered = r > 0; | |
1329 | } | |
1330 | ||
1331 | return triggered != 0; | |
1332 | } | |
1333 | ||
9588bc32 | 1334 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1335 | assert(u); |
1336 | ||
ac155bb8 | 1337 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1338 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1339 | |
ac155bb8 | 1340 | return u->condition_result; |
90bbc946 LP |
1341 | } |
1342 | ||
59fccdc5 LP |
1343 | static bool unit_assert_test(Unit *u) { |
1344 | assert(u); | |
1345 | ||
1346 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1347 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1348 | |
1349 | return u->assert_result; | |
1350 | } | |
1351 | ||
44a6b1b6 | 1352 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
877d54e9 | 1353 | const char *format; |
a85ca902 | 1354 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1355 | |
1356 | assert(u); | |
b5bf308b | 1357 | assert(t == JOB_START || t == JOB_STOP || t == JOB_RELOAD); |
877d54e9 | 1358 | |
b5bf308b | 1359 | if (t != JOB_RELOAD) { |
a85ca902 MS |
1360 | format_table = &UNIT_VTABLE(u)->status_message_formats; |
1361 | if (format_table) { | |
1362 | format = format_table->starting_stopping[t == JOB_STOP]; | |
1363 | if (format) | |
1364 | return format; | |
1365 | } | |
1366 | } | |
877d54e9 LP |
1367 | |
1368 | /* Return generic strings */ | |
1369 | if (t == JOB_START) | |
1370 | return "Starting %s."; | |
1371 | else if (t == JOB_STOP) | |
1372 | return "Stopping %s."; | |
b5bf308b | 1373 | else |
877d54e9 | 1374 | return "Reloading %s."; |
877d54e9 LP |
1375 | } |
1376 | ||
1377 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1378 | const char *format; | |
1379 | ||
1380 | assert(u); | |
1381 | ||
877d54e9 | 1382 | format = unit_get_status_message_format(u, t); |
c6918296 | 1383 | |
bcfce235 | 1384 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1385 | unit_status_printf(u, "", format); |
bcfce235 | 1386 | REENABLE_WARNING; |
c6918296 MS |
1387 | } |
1388 | ||
877d54e9 LP |
1389 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
1390 | const char *format; | |
1391 | char buf[LINE_MAX]; | |
1392 | sd_id128_t mid; | |
1393 | ||
1394 | assert(u); | |
1395 | ||
1396 | if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD) | |
1397 | return; | |
1398 | ||
81270860 LP |
1399 | if (log_on_console()) |
1400 | return; | |
1401 | ||
877d54e9 LP |
1402 | /* We log status messages for all units and all operations. */ |
1403 | ||
a85ca902 | 1404 | format = unit_get_status_message_format(u, t); |
877d54e9 | 1405 | |
bcfce235 | 1406 | DISABLE_WARNING_FORMAT_NONLITERAL; |
877d54e9 | 1407 | snprintf(buf, sizeof(buf), format, unit_description(u)); |
bcfce235 | 1408 | REENABLE_WARNING; |
877d54e9 LP |
1409 | |
1410 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1411 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1412 | SD_MESSAGE_UNIT_RELOADING; | |
1413 | ||
f2341e0a LP |
1414 | /* Note that we deliberately use LOG_MESSAGE() instead of |
1415 | * LOG_UNIT_MESSAGE() here, since this is supposed to mimic | |
1416 | * closely what is written to screen using the status output, | |
1417 | * which is supposed the highest level, friendliest output | |
1418 | * possible, which means we should avoid the low-level unit | |
1419 | * name. */ | |
1420 | log_struct(LOG_INFO, | |
1421 | LOG_MESSAGE_ID(mid), | |
1422 | LOG_UNIT_ID(u), | |
1423 | LOG_MESSAGE("%s", buf), | |
1424 | NULL); | |
877d54e9 | 1425 | } |
877d54e9 | 1426 | |
d1a34ae9 MS |
1427 | void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t) { |
1428 | ||
1429 | unit_status_log_starting_stopping_reloading(u, t); | |
1430 | ||
1431 | /* Reload status messages have traditionally not been printed to console. */ | |
1432 | if (t != JOB_RELOAD) | |
1433 | unit_status_print_starting_stopping(u, t); | |
1434 | } | |
1435 | ||
87f0e418 | 1436 | /* Errors: |
d5159713 LP |
1437 | * -EBADR: This unit type does not support starting. |
1438 | * -EALREADY: Unit is already started. | |
1439 | * -EAGAIN: An operation is already in progress. Retry later. | |
1440 | * -ECANCELED: Too many requests for now. | |
59fccdc5 | 1441 | * -EPROTO: Assert failed |
87f0e418 LP |
1442 | */ |
1443 | int unit_start(Unit *u) { | |
1444 | UnitActiveState state; | |
92ab323c | 1445 | Unit *following; |
87f0e418 LP |
1446 | |
1447 | assert(u); | |
1448 | ||
8ff4d2ab | 1449 | /* Units that aren't loaded cannot be started */ |
ac155bb8 | 1450 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1451 | return -EINVAL; |
1452 | ||
a82e5507 LP |
1453 | /* If this is already started, then this will succeed. Note |
1454 | * that this will even succeed if this unit is not startable | |
1455 | * by the user. This is relied on to detect when we need to | |
1456 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1457 | state = unit_active_state(u); |
1458 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1459 | return -EALREADY; | |
1460 | ||
a82e5507 LP |
1461 | /* If the conditions failed, don't do anything at all. If we |
1462 | * already are activating this call might still be useful to | |
1463 | * speed up activation in case there is some hold-off time, | |
1464 | * but we don't want to recheck the condition in that case. */ | |
1465 | if (state != UNIT_ACTIVATING && | |
1466 | !unit_condition_test(u)) { | |
f2341e0a | 1467 | log_unit_debug(u, "Starting requested but condition failed. Not starting unit."); |
52661efd LP |
1468 | return -EALREADY; |
1469 | } | |
1470 | ||
59fccdc5 LP |
1471 | /* If the asserts failed, fail the entire job */ |
1472 | if (state != UNIT_ACTIVATING && | |
1473 | !unit_assert_test(u)) { | |
f2341e0a | 1474 | log_unit_notice(u, "Starting requested but asserts failed."); |
59fccdc5 LP |
1475 | return -EPROTO; |
1476 | } | |
1477 | ||
d11a7645 LP |
1478 | /* Units of types that aren't supported cannot be |
1479 | * started. Note that we do this test only after the condition | |
1480 | * checks, so that we rather return condition check errors | |
1481 | * (which are usually not considered a true failure) than "not | |
1482 | * supported" errors (which are considered a failure). | |
1483 | */ | |
1484 | if (!unit_supported(u)) | |
1485 | return -EOPNOTSUPP; | |
1486 | ||
92ab323c | 1487 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1488 | following = unit_following(u); |
1489 | if (following) { | |
f2341e0a | 1490 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1491 | return unit_start(following); |
1492 | } | |
1493 | ||
1494 | /* If it is stopped, but we cannot start it, then fail */ | |
1495 | if (!UNIT_VTABLE(u)->start) | |
1496 | return -EBADR; | |
1497 | ||
87f0e418 LP |
1498 | /* We don't suppress calls to ->start() here when we are |
1499 | * already starting, to allow this request to be used as a | |
1500 | * "hurry up" call, for example when the unit is in some "auto | |
1501 | * restart" state where it waits for a holdoff timer to elapse | |
1502 | * before it will start again. */ | |
1503 | ||
c1e1601e | 1504 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1505 | |
d1a34ae9 | 1506 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1507 | } |
1508 | ||
1509 | bool unit_can_start(Unit *u) { | |
1510 | assert(u); | |
1511 | ||
8ff4d2ab LP |
1512 | if (u->load_state != UNIT_LOADED) |
1513 | return false; | |
1514 | ||
1515 | if (!unit_supported(u)) | |
1516 | return false; | |
1517 | ||
87f0e418 LP |
1518 | return !!UNIT_VTABLE(u)->start; |
1519 | } | |
1520 | ||
2528a7a6 LP |
1521 | bool unit_can_isolate(Unit *u) { |
1522 | assert(u); | |
1523 | ||
1524 | return unit_can_start(u) && | |
ac155bb8 | 1525 | u->allow_isolate; |
2528a7a6 LP |
1526 | } |
1527 | ||
87f0e418 LP |
1528 | /* Errors: |
1529 | * -EBADR: This unit type does not support stopping. | |
1530 | * -EALREADY: Unit is already stopped. | |
1531 | * -EAGAIN: An operation is already in progress. Retry later. | |
1532 | */ | |
1533 | int unit_stop(Unit *u) { | |
1534 | UnitActiveState state; | |
92ab323c | 1535 | Unit *following; |
87f0e418 LP |
1536 | |
1537 | assert(u); | |
1538 | ||
87f0e418 | 1539 | state = unit_active_state(u); |
fdf20a31 | 1540 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1541 | return -EALREADY; |
1542 | ||
0faacd47 LP |
1543 | following = unit_following(u); |
1544 | if (following) { | |
f2341e0a | 1545 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1546 | return unit_stop(following); |
1547 | } | |
1548 | ||
7898b0cf LP |
1549 | if (!UNIT_VTABLE(u)->stop) |
1550 | return -EBADR; | |
1551 | ||
c1e1601e | 1552 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1553 | |
d1a34ae9 | 1554 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1555 | } |
1556 | ||
1557 | /* Errors: | |
1558 | * -EBADR: This unit type does not support reloading. | |
1559 | * -ENOEXEC: Unit is not started. | |
1560 | * -EAGAIN: An operation is already in progress. Retry later. | |
1561 | */ | |
1562 | int unit_reload(Unit *u) { | |
1563 | UnitActiveState state; | |
92ab323c | 1564 | Unit *following; |
87f0e418 LP |
1565 | |
1566 | assert(u); | |
1567 | ||
ac155bb8 | 1568 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1569 | return -EINVAL; |
1570 | ||
87f0e418 LP |
1571 | if (!unit_can_reload(u)) |
1572 | return -EBADR; | |
1573 | ||
1574 | state = unit_active_state(u); | |
e364ad06 | 1575 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1576 | return -EALREADY; |
1577 | ||
6a371e23 | 1578 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1579 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1580 | return -ENOEXEC; |
6a371e23 | 1581 | } |
87f0e418 | 1582 | |
e48614c4 ZJS |
1583 | following = unit_following(u); |
1584 | if (following) { | |
f2341e0a | 1585 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1586 | return unit_reload(following); |
1587 | } | |
1588 | ||
c1e1601e | 1589 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1590 | |
d1a34ae9 | 1591 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1592 | } |
1593 | ||
1594 | bool unit_can_reload(Unit *u) { | |
1595 | assert(u); | |
1596 | ||
1597 | if (!UNIT_VTABLE(u)->reload) | |
1598 | return false; | |
1599 | ||
1600 | if (!UNIT_VTABLE(u)->can_reload) | |
1601 | return true; | |
1602 | ||
1603 | return UNIT_VTABLE(u)->can_reload(u); | |
1604 | } | |
1605 | ||
b4a16b7b | 1606 | static void unit_check_unneeded(Unit *u) { |
be7d9ff7 LP |
1607 | |
1608 | static const UnitDependency needed_dependencies[] = { | |
1609 | UNIT_REQUIRED_BY, | |
1610 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
084918ba | 1611 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1612 | UNIT_REQUISITE_OF_OVERRIDABLE, |
1613 | UNIT_WANTED_BY, | |
1614 | UNIT_BOUND_BY, | |
1615 | }; | |
1616 | ||
f3bff0eb | 1617 | Unit *other; |
be7d9ff7 LP |
1618 | Iterator i; |
1619 | unsigned j; | |
1620 | int r; | |
f3bff0eb LP |
1621 | |
1622 | assert(u); | |
1623 | ||
1624 | /* If this service shall be shut down when unneeded then do | |
1625 | * so. */ | |
1626 | ||
ac155bb8 | 1627 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1628 | return; |
1629 | ||
1630 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1631 | return; | |
1632 | ||
be7d9ff7 | 1633 | for (j = 0; j < ELEMENTSOF(needed_dependencies); j++) |
f3b85044 | 1634 | SET_FOREACH(other, u->dependencies[needed_dependencies[j]], i) |
be7d9ff7 LP |
1635 | if (unit_active_or_pending(other)) |
1636 | return; | |
b81884e7 | 1637 | |
bea355da LP |
1638 | /* If stopping a unit fails continously we might enter a stop |
1639 | * loop here, hence stop acting on the service being | |
1640 | * unnecessary after a while. */ | |
67bfdc97 | 1641 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { |
bea355da LP |
1642 | log_unit_warning(u, "Unit not needed anymore, but not stopping since we tried this too often recently."); |
1643 | return; | |
1644 | } | |
1645 | ||
f2341e0a | 1646 | log_unit_info(u, "Unit not needed anymore. Stopping."); |
f3bff0eb LP |
1647 | |
1648 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
be7d9ff7 LP |
1649 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
1650 | if (r < 0) | |
1651 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %m"); | |
f3bff0eb LP |
1652 | } |
1653 | ||
ff502445 LP |
1654 | static void unit_check_binds_to(Unit *u) { |
1655 | bool stop = false; | |
1656 | Unit *other; | |
1657 | Iterator i; | |
67bfdc97 | 1658 | int r; |
ff502445 LP |
1659 | |
1660 | assert(u); | |
1661 | ||
1662 | if (u->job) | |
1663 | return; | |
1664 | ||
1665 | if (unit_active_state(u) != UNIT_ACTIVE) | |
1666 | return; | |
1667 | ||
1668 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) { | |
1669 | if (other->job) | |
1670 | continue; | |
1671 | ||
1672 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1673 | continue; | |
1674 | ||
1675 | stop = true; | |
98f738b6 | 1676 | break; |
ff502445 LP |
1677 | } |
1678 | ||
1679 | if (!stop) | |
1680 | return; | |
1681 | ||
67bfdc97 LP |
1682 | /* If stopping a unit fails continously we might enter a stop |
1683 | * loop here, hence stop acting on the service being | |
1684 | * unnecessary after a while. */ | |
1685 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { | |
1686 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); | |
1687 | return; | |
1688 | } | |
1689 | ||
98f738b6 | 1690 | assert(other); |
f2341e0a | 1691 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
1692 | |
1693 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
67bfdc97 LP |
1694 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
1695 | if (r < 0) | |
1696 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %m"); | |
ff502445 LP |
1697 | } |
1698 | ||
87f0e418 LP |
1699 | static void retroactively_start_dependencies(Unit *u) { |
1700 | Iterator i; | |
1701 | Unit *other; | |
1702 | ||
1703 | assert(u); | |
1704 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1705 | ||
ac155bb8 MS |
1706 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1707 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1708 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1709 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1710 | |
7f2cddae | 1711 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1712 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1713 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1714 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1715 | |
ac155bb8 MS |
1716 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
1717 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1718 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1719 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1720 | |
ac155bb8 MS |
1721 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1722 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1723 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1724 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1725 | |
ac155bb8 | 1726 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1727 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1728 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1729 | |
ac155bb8 | 1730 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1731 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1732 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1733 | } |
1734 | ||
1735 | static void retroactively_stop_dependencies(Unit *u) { | |
1736 | Iterator i; | |
1737 | Unit *other; | |
1738 | ||
1739 | assert(u); | |
1740 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1741 | ||
b81884e7 | 1742 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1743 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1744 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1745 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1746 | } |
1747 | ||
1748 | static void check_unneeded_dependencies(Unit *u) { | |
1749 | Iterator i; | |
1750 | Unit *other; | |
1751 | ||
1752 | assert(u); | |
1753 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1754 | |
1755 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1756 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1757 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1758 | unit_check_unneeded(other); |
ac155bb8 | 1759 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1760 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1761 | unit_check_unneeded(other); |
ac155bb8 | 1762 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1763 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1764 | unit_check_unneeded(other); |
ac155bb8 | 1765 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1766 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1767 | unit_check_unneeded(other); |
ac155bb8 | 1768 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1769 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1770 | unit_check_unneeded(other); |
7f2cddae | 1771 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1772 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1773 | unit_check_unneeded(other); | |
87f0e418 LP |
1774 | } |
1775 | ||
3ecaa09b | 1776 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1777 | Unit *other; |
1778 | Iterator i; | |
1779 | ||
1780 | assert(u); | |
1781 | ||
ac155bb8 | 1782 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1783 | return; |
1784 | ||
f2341e0a | 1785 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 1786 | |
ac155bb8 | 1787 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1788 | int r; |
1789 | ||
d420282b | 1790 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, true, NULL, NULL); |
c1b6628d | 1791 | if (r < 0) |
f2341e0a | 1792 | log_unit_error_errno(u, r, "Failed to enqueue OnFailure= job: %m"); |
222ae6a8 | 1793 | } |
c0daa706 LP |
1794 | } |
1795 | ||
3ecaa09b LP |
1796 | void unit_trigger_notify(Unit *u) { |
1797 | Unit *other; | |
1798 | Iterator i; | |
1799 | ||
1800 | assert(u); | |
1801 | ||
1802 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1803 | if (UNIT_VTABLE(other)->trigger_notify) | |
1804 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1805 | } | |
1806 | ||
e2f3b44c | 1807 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 1808 | Manager *m; |
7e6e7b06 | 1809 | bool unexpected; |
a096ed36 | 1810 | |
87f0e418 LP |
1811 | assert(u); |
1812 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1813 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1814 | |
8e471ccd LP |
1815 | /* Note that this is called for all low-level state changes, |
1816 | * even if they might map to the same high-level | |
865cc19a | 1817 | * UnitActiveState! That means that ns == os is an expected |
c5315881 | 1818 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1819 | * this function will be called too! */ |
87f0e418 | 1820 | |
546ac4f0 MS |
1821 | m = u->manager; |
1822 | ||
f755e3b7 | 1823 | /* Update timestamps for state changes */ |
546ac4f0 | 1824 | if (m->n_reloading <= 0) { |
bdbf9951 | 1825 | dual_timestamp ts; |
173e3821 | 1826 | |
bdbf9951 | 1827 | dual_timestamp_get(&ts); |
173e3821 | 1828 | |
bdbf9951 | 1829 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1830 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1831 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1832 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1833 | |
1834 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1835 | u->active_enter_timestamp = ts; |
bdbf9951 | 1836 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1837 | u->active_exit_timestamp = ts; |
bdbf9951 | 1838 | } |
87f0e418 | 1839 | |
865cc19a | 1840 | /* Keep track of failed units */ |
5269eb6b | 1841 | (void) manager_update_failed_units(u->manager, u, ns == UNIT_FAILED); |
f755e3b7 LP |
1842 | |
1843 | /* Make sure the cgroup is always removed when we become inactive */ | |
fdf20a31 | 1844 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
efdb0237 | 1845 | unit_prune_cgroup(u); |
fb385181 | 1846 | |
9cd86184 | 1847 | /* Note that this doesn't apply to RemainAfterExit services exiting |
6f285378 | 1848 | * successfully, since there's no change of state in that case. Which is |
9cd86184 | 1849 | * why it is handled in service_set_state() */ |
7ed9f6cd | 1850 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
1851 | ExecContext *ec; |
1852 | ||
1853 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 1854 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 ZJS |
1855 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
1856 | m->n_on_console --; | |
1857 | ||
1858 | if (m->n_on_console == 0) | |
1859 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 1860 | m->no_console_output = false; |
31a7eb86 ZJS |
1861 | } else |
1862 | m->n_on_console ++; | |
7ed9f6cd MS |
1863 | } |
1864 | } | |
1865 | ||
ac155bb8 | 1866 | if (u->job) { |
7e6e7b06 | 1867 | unexpected = false; |
87f0e418 | 1868 | |
ac155bb8 | 1869 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1870 | |
1871 | /* So we reached a different state for this | |
1872 | * job. Let's see if we can run it now if it | |
1873 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1874 | job_add_to_run_queue(u->job); |
87f0e418 | 1875 | |
b410e6b9 | 1876 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1877 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1878 | * hence needs to invalidate jobs. */ |
87f0e418 | 1879 | |
ac155bb8 | 1880 | switch (u->job->type) { |
87f0e418 | 1881 | |
b410e6b9 LP |
1882 | case JOB_START: |
1883 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1884 | |
b410e6b9 | 1885 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1886 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1887 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1888 | unexpected = true; |
41b02ec7 | 1889 | |
fdf20a31 | 1890 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1891 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1892 | } |
87f0e418 | 1893 | |
b410e6b9 | 1894 | break; |
87f0e418 | 1895 | |
b410e6b9 LP |
1896 | case JOB_RELOAD: |
1897 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1898 | |
ac155bb8 | 1899 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1900 | if (ns == UNIT_ACTIVE) |
5273510e | 1901 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1902 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1903 | unexpected = true; |
41b02ec7 | 1904 | |
fdf20a31 | 1905 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1906 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1907 | } |
b410e6b9 | 1908 | } |
87f0e418 | 1909 | |
b410e6b9 | 1910 | break; |
87f0e418 | 1911 | |
b410e6b9 LP |
1912 | case JOB_STOP: |
1913 | case JOB_RESTART: | |
1914 | case JOB_TRY_RESTART: | |
87f0e418 | 1915 | |
fdf20a31 | 1916 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1917 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1918 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1919 | unexpected = true; |
5273510e | 1920 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1921 | } |
87f0e418 | 1922 | |
b410e6b9 | 1923 | break; |
87f0e418 | 1924 | |
b410e6b9 LP |
1925 | default: |
1926 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1927 | } |
87f0e418 | 1928 | |
7e6e7b06 LP |
1929 | } else |
1930 | unexpected = true; | |
1931 | ||
546ac4f0 | 1932 | if (m->n_reloading <= 0) { |
f3bff0eb | 1933 | |
bdbf9951 LP |
1934 | /* If this state change happened without being |
1935 | * requested by a job, then let's retroactively start | |
1936 | * or stop dependencies. We skip that step when | |
1937 | * deserializing, since we don't want to create any | |
1938 | * additional jobs just because something is already | |
1939 | * activated. */ | |
1940 | ||
1941 | if (unexpected) { | |
1942 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1943 | retroactively_start_dependencies(u); | |
1944 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1945 | retroactively_stop_dependencies(u); | |
1946 | } | |
5de9682c | 1947 | |
cd0504d0 | 1948 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 1949 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
1950 | check_unneeded_dependencies(u); |
1951 | ||
bdbf9951 | 1952 | if (ns != os && ns == UNIT_FAILED) { |
f2341e0a | 1953 | log_unit_notice(u, "Unit entered failed state."); |
3ecaa09b | 1954 | unit_start_on_failure(u); |
cd6d0a45 | 1955 | } |
3b2775c5 | 1956 | } |
e537352b | 1957 | |
3b2775c5 LP |
1958 | /* Some names are special */ |
1959 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1960 | ||
1961 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
865cc19a | 1962 | /* The bus might have just become available, |
3b2775c5 LP |
1963 | * hence try to connect to it, if we aren't |
1964 | * yet connected. */ | |
546ac4f0 | 1965 | bus_init(m, true); |
3b2775c5 | 1966 | |
ac155bb8 | 1967 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1968 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
546ac4f0 | 1969 | m->n_reloading <= 0) { |
3b2775c5 | 1970 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 1971 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 1972 | u->in_audit = true; |
3b2775c5 | 1973 | } |
e983b760 | 1974 | |
3b2775c5 | 1975 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 1976 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 1977 | |
3b2775c5 | 1978 | } else { |
bdbf9951 | 1979 | |
3b2775c5 LP |
1980 | /* We don't care about D-Bus here, since we'll get an |
1981 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1982 | |
ac155bb8 | 1983 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1984 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1985 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
546ac4f0 | 1986 | m->n_reloading <= 0) { |
4927fcae | 1987 | |
3b2775c5 LP |
1988 | /* Hmm, if there was no start record written |
1989 | * write it now, so that we always have a nice | |
1990 | * pair */ | |
ac155bb8 | 1991 | if (!u->in_audit) { |
546ac4f0 | 1992 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 1993 | |
3b2775c5 | 1994 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 1995 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1996 | } else |
1997 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 1998 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1999 | |
ac155bb8 | 2000 | u->in_audit = false; |
cd6d0a45 | 2001 | } |
f278026d LP |
2002 | } |
2003 | ||
546ac4f0 | 2004 | manager_recheck_journal(m); |
3ecaa09b | 2005 | unit_trigger_notify(u); |
3b2775c5 | 2006 | |
ff502445 LP |
2007 | if (u->manager->n_reloading <= 0) { |
2008 | /* Maybe we finished startup and are now ready for | |
2009 | * being stopped because unneeded? */ | |
bf6dcfa6 | 2010 | unit_check_unneeded(u); |
c1e1601e | 2011 | |
ff502445 LP |
2012 | /* Maybe we finished startup, but something we needed |
2013 | * has vanished? Let's die then. (This happens when | |
2014 | * something BindsTo= to a Type=oneshot unit, as these | |
2015 | * units go directly from starting to inactive, | |
2016 | * without ever entering started.) */ | |
2017 | unit_check_binds_to(u); | |
2018 | } | |
2019 | ||
c1e1601e | 2020 | unit_add_to_dbus_queue(u); |
701cc384 | 2021 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2022 | } |
2023 | ||
87f0e418 | 2024 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
2025 | int q, r; |
2026 | ||
87f0e418 LP |
2027 | assert(u); |
2028 | assert(pid >= 1); | |
2029 | ||
5ba6985b LP |
2030 | /* Watch a specific PID. We only support one or two units |
2031 | * watching each PID for now, not more. */ | |
2032 | ||
d5099efc | 2033 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2034 | if (r < 0) |
2035 | return r; | |
2036 | ||
d5099efc | 2037 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL); |
a911bb9a LP |
2038 | if (r < 0) |
2039 | return r; | |
2040 | ||
fea72cc0 | 2041 | r = hashmap_put(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
5ba6985b | 2042 | if (r == -EEXIST) { |
d5099efc | 2043 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL); |
5ba6985b LP |
2044 | if (r < 0) |
2045 | return r; | |
05e343b7 | 2046 | |
fea72cc0 | 2047 | r = hashmap_put(u->manager->watch_pids2, PID_TO_PTR(pid), u); |
5ba6985b | 2048 | } |
a911bb9a | 2049 | |
fea72cc0 | 2050 | q = set_put(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2051 | if (q < 0) |
2052 | return q; | |
2053 | ||
2054 | return r; | |
87f0e418 LP |
2055 | } |
2056 | ||
2057 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
2058 | assert(u); | |
2059 | assert(pid >= 1); | |
2060 | ||
fea72cc0 LP |
2061 | (void) hashmap_remove_value(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
2062 | (void) hashmap_remove_value(u->manager->watch_pids2, PID_TO_PTR(pid), u); | |
2063 | (void) set_remove(u->pids, PID_TO_PTR(pid)); | |
a911bb9a LP |
2064 | } |
2065 | ||
bd44e61b LP |
2066 | void unit_unwatch_all_pids(Unit *u) { |
2067 | assert(u); | |
2068 | ||
2069 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2070 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2071 | |
efdb0237 | 2072 | u->pids = set_free(u->pids); |
a911bb9a LP |
2073 | } |
2074 | ||
2075 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2076 | Iterator i; | |
2077 | void *e; | |
2078 | ||
2079 | assert(u); | |
2080 | ||
2081 | /* Cleans dead PIDs from our list */ | |
2082 | ||
2083 | SET_FOREACH(e, u->pids, i) { | |
fea72cc0 | 2084 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2085 | |
2086 | if (pid == except1 || pid == except2) | |
2087 | continue; | |
2088 | ||
9f5650ae | 2089 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2090 | unit_unwatch_pid(u, pid); |
a911bb9a | 2091 | } |
87f0e418 LP |
2092 | } |
2093 | ||
87f0e418 LP |
2094 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2095 | assert(u); | |
2096 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2097 | ||
2098 | switch (j) { | |
2099 | ||
2100 | case JOB_VERIFY_ACTIVE: | |
2101 | case JOB_START: | |
57339f47 | 2102 | case JOB_STOP: |
e0209d83 | 2103 | case JOB_NOP: |
87f0e418 LP |
2104 | return true; |
2105 | ||
87f0e418 LP |
2106 | case JOB_RESTART: |
2107 | case JOB_TRY_RESTART: | |
2108 | return unit_can_start(u); | |
2109 | ||
2110 | case JOB_RELOAD: | |
2111 | return unit_can_reload(u); | |
2112 | ||
2113 | case JOB_RELOAD_OR_START: | |
2114 | return unit_can_reload(u) && unit_can_start(u); | |
2115 | ||
2116 | default: | |
2117 | assert_not_reached("Invalid job type"); | |
2118 | } | |
2119 | } | |
2120 | ||
f2341e0a LP |
2121 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2122 | assert(u); | |
d1fab3fe | 2123 | |
f2341e0a LP |
2124 | /* Only warn about some unit types */ |
2125 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2126 | return; | |
3f3cc397 | 2127 | |
f2341e0a LP |
2128 | if (streq_ptr(u->id, other)) |
2129 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2130 | else | |
2131 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2132 | } |
2133 | ||
701cc384 | 2134 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
2135 | |
2136 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2137 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 2138 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 | 2139 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 LP |
2140 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
2141 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUISITE_OF_OVERRIDABLE, | |
7f2cddae | 2142 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2143 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 LP |
2144 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
2145 | [UNIT_REQUIRED_BY_OVERRIDABLE] = UNIT_REQUIRES_OVERRIDABLE, | |
2146 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, | |
2147 | [UNIT_REQUISITE_OF_OVERRIDABLE] = UNIT_REQUISITE_OVERRIDABLE, | |
2148 | [UNIT_WANTED_BY] = UNIT_WANTS, | |
7f2cddae | 2149 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2150 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2151 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2152 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2153 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2154 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2155 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2156 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2157 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2158 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2159 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2160 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2161 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2162 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2163 | }; |
701cc384 | 2164 | int r, q = 0, v = 0, w = 0; |
d1fab3fe | 2165 | Unit *orig_u = u, *orig_other = other; |
87f0e418 LP |
2166 | |
2167 | assert(u); | |
2168 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2169 | assert(other); |
2170 | ||
9f151f29 LP |
2171 | u = unit_follow_merge(u); |
2172 | other = unit_follow_merge(other); | |
2173 | ||
87f0e418 LP |
2174 | /* We won't allow dependencies on ourselves. We will not |
2175 | * consider them an error however. */ | |
d1fab3fe | 2176 | if (u == other) { |
f2341e0a | 2177 | maybe_warn_about_dependency(orig_u, orig_other->id, d); |
87f0e418 | 2178 | return 0; |
d1fab3fe | 2179 | } |
87f0e418 | 2180 | |
d5099efc | 2181 | r = set_ensure_allocated(&u->dependencies[d], NULL); |
613b411c | 2182 | if (r < 0) |
87f0e418 LP |
2183 | return r; |
2184 | ||
613b411c | 2185 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
d5099efc | 2186 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], NULL); |
613b411c LP |
2187 | if (r < 0) |
2188 | return r; | |
2189 | } | |
2190 | ||
2191 | if (add_reference) { | |
d5099efc | 2192 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], NULL); |
613b411c | 2193 | if (r < 0) |
5de9682c LP |
2194 | return r; |
2195 | ||
d5099efc | 2196 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], NULL); |
613b411c | 2197 | if (r < 0) |
701cc384 | 2198 | return r; |
613b411c | 2199 | } |
87f0e418 | 2200 | |
613b411c LP |
2201 | q = set_put(u->dependencies[d], other); |
2202 | if (q < 0) | |
701cc384 | 2203 | return q; |
87f0e418 | 2204 | |
613b411c LP |
2205 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2206 | v = set_put(other->dependencies[inverse_table[d]], u); | |
2207 | if (v < 0) { | |
5de9682c LP |
2208 | r = v; |
2209 | goto fail; | |
2210 | } | |
613b411c | 2211 | } |
701cc384 LP |
2212 | |
2213 | if (add_reference) { | |
613b411c LP |
2214 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
2215 | if (w < 0) { | |
701cc384 LP |
2216 | r = w; |
2217 | goto fail; | |
2218 | } | |
2219 | ||
613b411c LP |
2220 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
2221 | if (r < 0) | |
701cc384 | 2222 | goto fail; |
87f0e418 LP |
2223 | } |
2224 | ||
c1e1601e | 2225 | unit_add_to_dbus_queue(u); |
87f0e418 | 2226 | return 0; |
701cc384 LP |
2227 | |
2228 | fail: | |
2229 | if (q > 0) | |
ac155bb8 | 2230 | set_remove(u->dependencies[d], other); |
701cc384 LP |
2231 | |
2232 | if (v > 0) | |
ac155bb8 | 2233 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
2234 | |
2235 | if (w > 0) | |
ac155bb8 | 2236 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
2237 | |
2238 | return r; | |
87f0e418 | 2239 | } |
0301abf4 | 2240 | |
2c966c03 LP |
2241 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
2242 | int r; | |
2243 | ||
2244 | assert(u); | |
2245 | ||
3f3cc397 LP |
2246 | r = unit_add_dependency(u, d, other, add_reference); |
2247 | if (r < 0) | |
2c966c03 LP |
2248 | return r; |
2249 | ||
7410616c | 2250 | return unit_add_dependency(u, e, other, add_reference); |
2c966c03 LP |
2251 | } |
2252 | ||
7410616c LP |
2253 | static int resolve_template(Unit *u, const char *name, const char*path, char **buf, const char **ret) { |
2254 | int r; | |
9e2f7c11 LP |
2255 | |
2256 | assert(u); | |
2257 | assert(name || path); | |
7410616c LP |
2258 | assert(buf); |
2259 | assert(ret); | |
9e2f7c11 LP |
2260 | |
2261 | if (!name) | |
2b6bf07d | 2262 | name = basename(path); |
9e2f7c11 | 2263 | |
7410616c LP |
2264 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2265 | *buf = NULL; | |
2266 | *ret = name; | |
2267 | return 0; | |
9e2f7c11 LP |
2268 | } |
2269 | ||
ac155bb8 | 2270 | if (u->instance) |
7410616c | 2271 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 2272 | else { |
ae018d9b | 2273 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2274 | |
7410616c LP |
2275 | r = unit_name_to_prefix(u->id, &i); |
2276 | if (r < 0) | |
2277 | return r; | |
9e2f7c11 | 2278 | |
7410616c | 2279 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 2280 | } |
7410616c LP |
2281 | if (r < 0) |
2282 | return r; | |
9e2f7c11 | 2283 | |
7410616c LP |
2284 | *ret = *buf; |
2285 | return 0; | |
9e2f7c11 LP |
2286 | } |
2287 | ||
701cc384 | 2288 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
7410616c | 2289 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
2290 | Unit *other; |
2291 | int r; | |
2292 | ||
9e2f7c11 LP |
2293 | assert(u); |
2294 | assert(name || path); | |
09b6b09f | 2295 | |
7410616c LP |
2296 | r = resolve_template(u, name, path, &buf, &name); |
2297 | if (r < 0) | |
2298 | return r; | |
09b6b09f | 2299 | |
8afbb8e1 LP |
2300 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2301 | if (r < 0) | |
2302 | return r; | |
9e2f7c11 | 2303 | |
8afbb8e1 | 2304 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
2305 | } |
2306 | ||
2c966c03 | 2307 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
7410616c | 2308 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2309 | Unit *other; |
2310 | int r; | |
2c966c03 LP |
2311 | |
2312 | assert(u); | |
2313 | assert(name || path); | |
2314 | ||
7410616c LP |
2315 | r = resolve_template(u, name, path, &buf, &name); |
2316 | if (r < 0) | |
2317 | return r; | |
2c966c03 | 2318 | |
3f3cc397 LP |
2319 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2320 | if (r < 0) | |
68eda4bd | 2321 | return r; |
2c966c03 | 2322 | |
3f3cc397 | 2323 | return unit_add_two_dependencies(u, d, e, other, add_reference); |
2c966c03 LP |
2324 | } |
2325 | ||
0301abf4 | 2326 | int set_unit_path(const char *p) { |
0301abf4 | 2327 | /* This is mostly for debug purposes */ |
cf7d80a5 | 2328 | if (setenv("SYSTEMD_UNIT_PATH", p, 0) < 0) |
26d04f86 | 2329 | return -errno; |
0301abf4 LP |
2330 | |
2331 | return 0; | |
2332 | } | |
88066b3a | 2333 | |
ea430986 | 2334 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2335 | assert(u); |
2336 | ||
ac155bb8 | 2337 | if (!u->id) |
04ade7d2 LP |
2338 | return NULL; |
2339 | ||
48899192 | 2340 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2341 | } |
2342 | ||
d79200e2 LP |
2343 | int unit_set_slice(Unit *u, Unit *slice) { |
2344 | assert(u); | |
2345 | assert(slice); | |
2346 | ||
2347 | /* Sets the unit slice if it has not been set before. Is extra | |
2348 | * careful, to only allow this for units that actually have a | |
2349 | * cgroup context. Also, we don't allow to set this for slices | |
2350 | * (since the parent slice is derived from the name). Make | |
2351 | * sure the unit we set is actually a slice. */ | |
2352 | ||
2353 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
2354 | return -EOPNOTSUPP; | |
2355 | ||
2356 | if (u->type == UNIT_SLICE) | |
2357 | return -EINVAL; | |
2358 | ||
102ef982 LP |
2359 | if (unit_active_state(u) != UNIT_INACTIVE) |
2360 | return -EBUSY; | |
2361 | ||
d79200e2 LP |
2362 | if (slice->type != UNIT_SLICE) |
2363 | return -EINVAL; | |
2364 | ||
efdb0237 LP |
2365 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
2366 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
2367 | return -EPERM; | |
2368 | ||
d79200e2 LP |
2369 | if (UNIT_DEREF(u->slice) == slice) |
2370 | return 0; | |
2371 | ||
2372 | if (UNIT_ISSET(u->slice)) | |
2373 | return -EBUSY; | |
2374 | ||
2375 | unit_ref_set(&u->slice, slice); | |
2376 | return 1; | |
2377 | } | |
2378 | ||
2379 | int unit_set_default_slice(Unit *u) { | |
a8833944 LP |
2380 | _cleanup_free_ char *b = NULL; |
2381 | const char *slice_name; | |
a016b922 LP |
2382 | Unit *slice; |
2383 | int r; | |
2384 | ||
2385 | assert(u); | |
2386 | ||
9444b1f2 | 2387 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2388 | return 0; |
2389 | ||
a8833944 LP |
2390 | if (u->instance) { |
2391 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2392 | |
a8833944 LP |
2393 | /* Implicitly place all instantiated units in their |
2394 | * own per-template slice */ | |
2395 | ||
7410616c LP |
2396 | r = unit_name_to_prefix(u->id, &prefix); |
2397 | if (r < 0) | |
2398 | return r; | |
a8833944 LP |
2399 | |
2400 | /* The prefix is already escaped, but it might include | |
2401 | * "-" which has a special meaning for slice units, | |
2402 | * hence escape it here extra. */ | |
7410616c | 2403 | escaped = unit_name_escape(prefix); |
a8833944 LP |
2404 | if (!escaped) |
2405 | return -ENOMEM; | |
2406 | ||
b2c23da8 | 2407 | if (u->manager->running_as == MANAGER_SYSTEM) |
a8833944 LP |
2408 | b = strjoin("system-", escaped, ".slice", NULL); |
2409 | else | |
2410 | b = strappend(escaped, ".slice"); | |
2411 | if (!b) | |
2412 | return -ENOMEM; | |
2413 | ||
2414 | slice_name = b; | |
2415 | } else | |
2416 | slice_name = | |
efdb0237 | 2417 | u->manager->running_as == MANAGER_SYSTEM && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
2418 | ? SPECIAL_SYSTEM_SLICE |
2419 | : SPECIAL_ROOT_SLICE; | |
2420 | ||
2421 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2422 | if (r < 0) |
2423 | return r; | |
2424 | ||
d79200e2 | 2425 | return unit_set_slice(u, slice); |
a016b922 LP |
2426 | } |
2427 | ||
9444b1f2 LP |
2428 | const char *unit_slice_name(Unit *u) { |
2429 | assert(u); | |
2430 | ||
2431 | if (!UNIT_ISSET(u->slice)) | |
2432 | return NULL; | |
2433 | ||
2434 | return UNIT_DEREF(u->slice)->id; | |
2435 | } | |
2436 | ||
f6ff8c29 | 2437 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2438 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2439 | int r; |
2440 | ||
2441 | assert(u); | |
2442 | assert(type); | |
2443 | assert(_found); | |
2444 | ||
7410616c LP |
2445 | r = unit_name_change_suffix(u->id, type, &t); |
2446 | if (r < 0) | |
2447 | return r; | |
2448 | if (unit_has_name(u, t)) | |
2449 | return -EINVAL; | |
f6ff8c29 | 2450 | |
ac155bb8 | 2451 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2452 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2453 | return r; |
2454 | } | |
2455 | ||
bbc29086 DM |
2456 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
2457 | const char *name, *old_owner, *new_owner; | |
2458 | Unit *u = userdata; | |
2459 | int r; | |
2460 | ||
2461 | assert(message); | |
2462 | assert(u); | |
2463 | ||
2464 | r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner); | |
2465 | if (r < 0) { | |
2466 | bus_log_parse_error(r); | |
2467 | return 0; | |
2468 | } | |
2469 | ||
2470 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
2471 | UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); | |
2472 | ||
2473 | return 0; | |
2474 | } | |
2475 | ||
9806e87d LP |
2476 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
2477 | const char *match; | |
bbc29086 | 2478 | |
9806e87d LP |
2479 | assert(u); |
2480 | assert(bus); | |
2481 | assert(name); | |
bbc29086 DM |
2482 | |
2483 | if (u->match_bus_slot) | |
2484 | return -EBUSY; | |
2485 | ||
9806e87d | 2486 | match = strjoina("type='signal'," |
bbc29086 DM |
2487 | "sender='org.freedesktop.DBus'," |
2488 | "path='/org/freedesktop/DBus'," | |
2489 | "interface='org.freedesktop.DBus'," | |
2490 | "member='NameOwnerChanged'," | |
9806e87d | 2491 | "arg0='", name, "'", |
bbc29086 | 2492 | NULL); |
bbc29086 DM |
2493 | |
2494 | return sd_bus_add_match(bus, &u->match_bus_slot, match, signal_name_owner_changed, u); | |
2495 | } | |
2496 | ||
05e343b7 | 2497 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
2498 | int r; |
2499 | ||
05e343b7 LP |
2500 | assert(u); |
2501 | assert(name); | |
2502 | ||
2503 | /* Watch a specific name on the bus. We only support one unit | |
2504 | * watching each name for now. */ | |
2505 | ||
bbc29086 DM |
2506 | if (u->manager->api_bus) { |
2507 | /* If the bus is already available, install the match directly. | |
2508 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 2509 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 DM |
2510 | if (r < 0) |
2511 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal: %m"); | |
2512 | } | |
2513 | ||
2514 | r = hashmap_put(u->manager->watch_bus, name, u); | |
2515 | if (r < 0) { | |
2516 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
2517 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); | |
2518 | } | |
2519 | ||
2520 | return 0; | |
05e343b7 LP |
2521 | } |
2522 | ||
2523 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2524 | assert(u); | |
2525 | assert(name); | |
2526 | ||
ac155bb8 | 2527 | hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 2528 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
05e343b7 LP |
2529 | } |
2530 | ||
a16e1123 LP |
2531 | bool unit_can_serialize(Unit *u) { |
2532 | assert(u); | |
2533 | ||
2534 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2535 | } | |
2536 | ||
6b78f9b4 | 2537 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2538 | int r; |
2539 | ||
2540 | assert(u); | |
2541 | assert(f); | |
2542 | assert(fds); | |
2543 | ||
9bdb98c5 LP |
2544 | if (unit_can_serialize(u)) { |
2545 | ExecRuntime *rt; | |
a16e1123 | 2546 | |
9bdb98c5 | 2547 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
2548 | if (r < 0) |
2549 | return r; | |
9bdb98c5 LP |
2550 | |
2551 | rt = unit_get_exec_runtime(u); | |
2552 | if (rt) { | |
f2341e0a | 2553 | r = exec_runtime_serialize(u, rt, f, fds); |
9bdb98c5 LP |
2554 | if (r < 0) |
2555 | return r; | |
2556 | } | |
e0209d83 MS |
2557 | } |
2558 | ||
ac155bb8 MS |
2559 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2560 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2561 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2562 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2563 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
59fccdc5 | 2564 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 2565 | |
ac155bb8 MS |
2566 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2567 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2568 | |
59fccdc5 LP |
2569 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
2570 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
2571 | ||
c2756a68 | 2572 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
5ad096b3 | 2573 | unit_serialize_item_format(u, f, "cpuacct-usage-base", "%" PRIu64, u->cpuacct_usage_base); |
c2756a68 LP |
2574 | |
2575 | if (u->cgroup_path) | |
2576 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
de1d4f9b | 2577 | unit_serialize_item(u, f, "cgroup-realized", yes_no(u->cgroup_realized)); |
c2756a68 | 2578 | |
32ee7d33 DM |
2579 | if (u->cgroup_netclass_id) |
2580 | unit_serialize_item_format(u, f, "netclass-id", "%" PRIu32, u->cgroup_netclass_id); | |
2581 | ||
613b411c LP |
2582 | if (serialize_jobs) { |
2583 | if (u->job) { | |
2584 | fprintf(f, "job\n"); | |
2585 | job_serialize(u->job, f, fds); | |
2586 | } | |
2587 | ||
2588 | if (u->nop_job) { | |
2589 | fprintf(f, "job\n"); | |
2590 | job_serialize(u->nop_job, f, fds); | |
2591 | } | |
2592 | } | |
2593 | ||
a16e1123 LP |
2594 | /* End marker */ |
2595 | fputc('\n', f); | |
2596 | return 0; | |
2597 | } | |
2598 | ||
a34ceba6 LP |
2599 | int unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { |
2600 | assert(u); | |
2601 | assert(f); | |
2602 | assert(key); | |
2603 | ||
2604 | if (!value) | |
2605 | return 0; | |
2606 | ||
2607 | fputs(key, f); | |
2608 | fputc('=', f); | |
2609 | fputs(value, f); | |
2610 | fputc('\n', f); | |
2611 | ||
2612 | return 1; | |
2613 | } | |
2614 | ||
2615 | int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *value) { | |
2616 | _cleanup_free_ char *c = NULL; | |
2617 | ||
2618 | assert(u); | |
2619 | assert(f); | |
2620 | assert(key); | |
2621 | ||
2622 | if (!value) | |
2623 | return 0; | |
2624 | ||
2625 | c = cescape(value); | |
2626 | if (!c) | |
2627 | return -ENOMEM; | |
2628 | ||
2629 | fputs(key, f); | |
2630 | fputc('=', f); | |
2631 | fputs(c, f); | |
2632 | fputc('\n', f); | |
2633 | ||
2634 | return 1; | |
2635 | } | |
2636 | ||
2637 | int unit_serialize_item_fd(Unit *u, FILE *f, FDSet *fds, const char *key, int fd) { | |
2638 | int copy; | |
2639 | ||
2640 | assert(u); | |
2641 | assert(f); | |
2642 | assert(key); | |
2643 | ||
2644 | if (fd < 0) | |
2645 | return 0; | |
2646 | ||
2647 | copy = fdset_put_dup(fds, fd); | |
2648 | if (copy < 0) | |
2649 | return copy; | |
2650 | ||
2651 | fprintf(f, "%s=%i\n", key, copy); | |
2652 | return 1; | |
2653 | } | |
2654 | ||
a16e1123 LP |
2655 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { |
2656 | va_list ap; | |
2657 | ||
2658 | assert(u); | |
2659 | assert(f); | |
2660 | assert(key); | |
2661 | assert(format); | |
2662 | ||
2663 | fputs(key, f); | |
2664 | fputc('=', f); | |
2665 | ||
2666 | va_start(ap, format); | |
2667 | vfprintf(f, format, ap); | |
2668 | va_end(ap); | |
2669 | ||
2670 | fputc('\n', f); | |
2671 | } | |
2672 | ||
a16e1123 | 2673 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
28b99ccd | 2674 | ExecRuntime **rt = NULL; |
9bdb98c5 | 2675 | size_t offset; |
a16e1123 LP |
2676 | int r; |
2677 | ||
2678 | assert(u); | |
2679 | assert(f); | |
2680 | assert(fds); | |
2681 | ||
613b411c LP |
2682 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2683 | if (offset > 0) | |
2684 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
2685 | ||
a16e1123 | 2686 | for (;;) { |
20c03b7b | 2687 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2688 | size_t k; |
2689 | ||
2690 | if (!fgets(line, sizeof(line), f)) { | |
2691 | if (feof(f)) | |
2692 | return 0; | |
2693 | return -errno; | |
2694 | } | |
2695 | ||
10f8e83c | 2696 | char_array_0(line); |
a16e1123 LP |
2697 | l = strstrip(line); |
2698 | ||
2699 | /* End marker */ | |
e911de99 | 2700 | if (isempty(l)) |
a16e1123 LP |
2701 | return 0; |
2702 | ||
2703 | k = strcspn(l, "="); | |
2704 | ||
2705 | if (l[k] == '=') { | |
2706 | l[k] = 0; | |
2707 | v = l+k+1; | |
2708 | } else | |
2709 | v = l+k; | |
2710 | ||
cca098b0 | 2711 | if (streq(l, "job")) { |
39a18c60 MS |
2712 | if (v[0] == '\0') { |
2713 | /* new-style serialized job */ | |
9c3349e2 LP |
2714 | Job *j; |
2715 | ||
2716 | j = job_new_raw(u); | |
39a18c60 | 2717 | if (!j) |
e911de99 | 2718 | return log_oom(); |
39a18c60 MS |
2719 | |
2720 | r = job_deserialize(j, f, fds); | |
2721 | if (r < 0) { | |
2722 | job_free(j); | |
2723 | return r; | |
2724 | } | |
cca098b0 | 2725 | |
39a18c60 MS |
2726 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2727 | if (r < 0) { | |
2728 | job_free(j); | |
2729 | return r; | |
2730 | } | |
e0209d83 MS |
2731 | |
2732 | r = job_install_deserialized(j); | |
2733 | if (r < 0) { | |
2734 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2735 | job_free(j); | |
2736 | return r; | |
2737 | } | |
ed10fa8c LP |
2738 | } else /* legacy for pre-44 */ |
2739 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); | |
cca098b0 | 2740 | continue; |
8aaf019b | 2741 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2742 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2743 | continue; |
2744 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2745 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2746 | continue; |
2747 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2748 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2749 | continue; |
2750 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2751 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2752 | continue; |
2791a8f8 | 2753 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2754 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 2755 | continue; |
59fccdc5 LP |
2756 | } else if (streq(l, "assert-timestamp")) { |
2757 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
2758 | continue; | |
2791a8f8 | 2759 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 2760 | |
e911de99 LP |
2761 | r = parse_boolean(v); |
2762 | if (r < 0) | |
f2341e0a | 2763 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 2764 | else |
e911de99 | 2765 | u->condition_result = r; |
efbac6d2 LP |
2766 | |
2767 | continue; | |
c2756a68 | 2768 | |
59fccdc5 | 2769 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 2770 | |
e911de99 LP |
2771 | r = parse_boolean(v); |
2772 | if (r < 0) | |
f2341e0a | 2773 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 2774 | else |
e911de99 | 2775 | u->assert_result = r; |
59fccdc5 LP |
2776 | |
2777 | continue; | |
2778 | ||
c2756a68 | 2779 | } else if (streq(l, "transient")) { |
c2756a68 | 2780 | |
e911de99 LP |
2781 | r = parse_boolean(v); |
2782 | if (r < 0) | |
f2341e0a | 2783 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 2784 | else |
e911de99 | 2785 | u->transient = r; |
c2756a68 LP |
2786 | |
2787 | continue; | |
e911de99 | 2788 | |
5ad096b3 LP |
2789 | } else if (streq(l, "cpuacct-usage-base")) { |
2790 | ||
2791 | r = safe_atou64(v, &u->cpuacct_usage_base); | |
2792 | if (r < 0) | |
f2341e0a | 2793 | log_unit_debug(u, "Failed to parse CPU usage %s, ignoring.", v); |
5ad096b3 | 2794 | |
0f908397 | 2795 | continue; |
4e595329 | 2796 | |
e911de99 | 2797 | } else if (streq(l, "cgroup")) { |
72673e86 | 2798 | |
e911de99 LP |
2799 | r = unit_set_cgroup_path(u, v); |
2800 | if (r < 0) | |
f2341e0a | 2801 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 2802 | |
efdb0237 LP |
2803 | (void) unit_watch_cgroup(u); |
2804 | ||
de1d4f9b WF |
2805 | continue; |
2806 | } else if (streq(l, "cgroup-realized")) { | |
2807 | int b; | |
2808 | ||
2809 | b = parse_boolean(v); | |
2810 | if (b < 0) | |
2811 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
2812 | else | |
2813 | u->cgroup_realized = b; | |
2814 | ||
32ee7d33 DM |
2815 | continue; |
2816 | } else if (streq(l, "netclass-id")) { | |
2817 | r = safe_atou32(v, &u->cgroup_netclass_id); | |
2818 | if (r < 0) | |
2819 | log_unit_debug(u, "Failed to parse netclass ID %s, ignoring.", v); | |
2820 | else { | |
2821 | r = unit_add_to_netclass_cgroup(u); | |
2822 | if (r < 0) | |
2823 | log_unit_debug_errno(u, r, "Failed to add unit to netclass cgroup, ignoring: %m"); | |
2824 | } | |
2825 | ||
c2756a68 | 2826 | continue; |
8aaf019b | 2827 | } |
cca098b0 | 2828 | |
9bdb98c5 LP |
2829 | if (unit_can_serialize(u)) { |
2830 | if (rt) { | |
f2341e0a | 2831 | r = exec_runtime_deserialize_item(u, rt, l, v, fds); |
e911de99 | 2832 | if (r < 0) { |
f2341e0a | 2833 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); |
e911de99 LP |
2834 | continue; |
2835 | } | |
2836 | ||
2837 | /* Returns positive if key was handled by the call */ | |
9bdb98c5 LP |
2838 | if (r > 0) |
2839 | continue; | |
2840 | } | |
2841 | ||
2842 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); | |
613b411c | 2843 | if (r < 0) |
f2341e0a | 2844 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 2845 | } |
a16e1123 LP |
2846 | } |
2847 | } | |
2848 | ||
6e2ef85b LP |
2849 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2850 | Unit *device; | |
68eda4bd | 2851 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
2852 | int r; |
2853 | ||
2854 | assert(u); | |
2855 | ||
6e2ef85b | 2856 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
2857 | if (isempty(what)) |
2858 | return 0; | |
6e2ef85b | 2859 | |
8407a5d0 | 2860 | if (!is_device_path(what)) |
6e2ef85b LP |
2861 | return 0; |
2862 | ||
47bc12e1 LP |
2863 | /* When device units aren't supported (such as in a |
2864 | * container), don't create dependencies on them. */ | |
1c2e9646 | 2865 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
2866 | return 0; |
2867 | ||
7410616c LP |
2868 | r = unit_name_from_path(what, ".device", &e); |
2869 | if (r < 0) | |
2870 | return r; | |
6e2ef85b | 2871 | |
ac155bb8 | 2872 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
2873 | if (r < 0) |
2874 | return r; | |
2875 | ||
b2c23da8 | 2876 | r = unit_add_two_dependencies(u, UNIT_AFTER, u->manager->running_as == MANAGER_SYSTEM ? UNIT_BINDS_TO : UNIT_WANTS, device, true); |
faa368e3 | 2877 | if (r < 0) |
6e2ef85b LP |
2878 | return r; |
2879 | ||
faa368e3 LP |
2880 | if (wants) { |
2881 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2882 | if (r < 0) | |
6e2ef85b | 2883 | return r; |
faa368e3 | 2884 | } |
6e2ef85b LP |
2885 | |
2886 | return 0; | |
2887 | } | |
a16e1123 | 2888 | |
be847e82 | 2889 | int unit_coldplug(Unit *u) { |
cca098b0 LP |
2890 | int r; |
2891 | ||
2892 | assert(u); | |
2893 | ||
f78f265f LP |
2894 | /* Make sure we don't enter a loop, when coldplugging |
2895 | * recursively. */ | |
2896 | if (u->coldplugged) | |
2897 | return 0; | |
2898 | ||
2899 | u->coldplugged = true; | |
2900 | ||
f78f265f LP |
2901 | if (UNIT_VTABLE(u)->coldplug) { |
2902 | r = UNIT_VTABLE(u)->coldplug(u); | |
2903 | if (r < 0) | |
2904 | return r; | |
2905 | } | |
cca098b0 | 2906 | |
39a18c60 MS |
2907 | if (u->job) { |
2908 | r = job_coldplug(u->job); | |
2909 | if (r < 0) | |
2910 | return r; | |
be847e82 | 2911 | } |
cca098b0 LP |
2912 | |
2913 | return 0; | |
2914 | } | |
2915 | ||
49b1d377 | 2916 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
bcfce235 | 2917 | DISABLE_WARNING_FORMAT_NONLITERAL; |
127d5fd1 ZJS |
2918 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, |
2919 | status, unit_status_msg_format, unit_description(u)); | |
bcfce235 | 2920 | REENABLE_WARNING; |
49b1d377 MS |
2921 | } |
2922 | ||
45fb0699 | 2923 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
2924 | _cleanup_strv_free_ char **t = NULL; |
2925 | char **path; | |
1b64d026 | 2926 | struct stat st; |
ae7a7182 | 2927 | unsigned loaded_cnt, current_cnt; |
1b64d026 | 2928 | |
45fb0699 LP |
2929 | assert(u); |
2930 | ||
ac155bb8 | 2931 | if (u->fragment_path) { |
5f4b19f4 | 2932 | zero(st); |
ac155bb8 | 2933 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2934 | /* What, cannot access this anymore? */ |
2935 | return true; | |
45fb0699 | 2936 | |
ac155bb8 MS |
2937 | if (u->fragment_mtime > 0 && |
2938 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2939 | return true; |
2940 | } | |
2941 | ||
1b64d026 LP |
2942 | if (u->source_path) { |
2943 | zero(st); | |
2944 | if (stat(u->source_path, &st) < 0) | |
2945 | return true; | |
2946 | ||
2947 | if (u->source_mtime > 0 && | |
2948 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2949 | return true; | |
2950 | } | |
5f4b19f4 | 2951 | |
1a7f1b38 | 2952 | (void) unit_find_dropin_paths(u, &t); |
ae7a7182 OS |
2953 | loaded_cnt = strv_length(t); |
2954 | current_cnt = strv_length(u->dropin_paths); | |
2955 | ||
2956 | if (loaded_cnt == current_cnt) { | |
2957 | if (loaded_cnt == 0) | |
2958 | return false; | |
2959 | ||
2960 | if (strv_overlap(u->dropin_paths, t)) { | |
2961 | STRV_FOREACH(path, u->dropin_paths) { | |
2962 | zero(st); | |
2963 | if (stat(*path, &st) < 0) | |
2964 | return true; | |
2965 | ||
2966 | if (u->dropin_mtime > 0 && | |
2967 | timespec_load(&st.st_mtim) > u->dropin_mtime) | |
2968 | return true; | |
2969 | } | |
2970 | ||
2971 | return false; | |
2972 | } else | |
2973 | return true; | |
2974 | } else | |
2975 | return true; | |
45fb0699 LP |
2976 | } |
2977 | ||
fdf20a31 | 2978 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2979 | assert(u); |
2980 | ||
fdf20a31 MM |
2981 | if (UNIT_VTABLE(u)->reset_failed) |
2982 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2983 | } |
2984 | ||
a7f241db LP |
2985 | Unit *unit_following(Unit *u) { |
2986 | assert(u); | |
2987 | ||
2988 | if (UNIT_VTABLE(u)->following) | |
2989 | return UNIT_VTABLE(u)->following(u); | |
2990 | ||
2991 | return NULL; | |
2992 | } | |
2993 | ||
31afa0a4 | 2994 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
2995 | assert(u); |
2996 | ||
31afa0a4 LP |
2997 | /* This call does check the current state of the unit. It's |
2998 | * hence useful to be called from state change calls of the | |
2999 | * unit itself, where the state isn't updated yet. This is | |
3000 | * different from unit_inactive_or_pending() which checks both | |
3001 | * the current state and for a queued job. */ | |
18ffdfda | 3002 | |
31afa0a4 LP |
3003 | return u->job && u->job->type == JOB_STOP; |
3004 | } | |
3005 | ||
3006 | bool unit_inactive_or_pending(Unit *u) { | |
3007 | assert(u); | |
3008 | ||
3009 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3010 | |
d956ac29 LP |
3011 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3012 | return true; | |
3013 | ||
31afa0a4 | 3014 | if (unit_stop_pending(u)) |
18ffdfda LP |
3015 | return true; |
3016 | ||
3017 | return false; | |
3018 | } | |
3019 | ||
31afa0a4 | 3020 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3021 | assert(u); |
3022 | ||
f60c2665 | 3023 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3024 | |
3025 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3026 | return true; | |
3027 | ||
ac155bb8 MS |
3028 | if (u->job && |
3029 | (u->job->type == JOB_START || | |
3030 | u->job->type == JOB_RELOAD_OR_START || | |
3031 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
3032 | return true; |
3033 | ||
3034 | return false; | |
3035 | } | |
3036 | ||
718db961 | 3037 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3038 | assert(u); |
3039 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
3040 | assert(signo > 0); |
3041 | assert(signo < _NSIG); | |
3042 | ||
8a0867d6 | 3043 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3044 | return -EOPNOTSUPP; |
8a0867d6 | 3045 | |
c74f17d9 | 3046 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3047 | } |
3048 | ||
82659fd7 LP |
3049 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
3050 | Set *pid_set; | |
3051 | int r; | |
3052 | ||
d5099efc | 3053 | pid_set = set_new(NULL); |
82659fd7 LP |
3054 | if (!pid_set) |
3055 | return NULL; | |
3056 | ||
3057 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3058 | if (main_pid > 0) { | |
fea72cc0 | 3059 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 LP |
3060 | if (r < 0) |
3061 | goto fail; | |
3062 | } | |
3063 | ||
3064 | if (control_pid > 0) { | |
fea72cc0 | 3065 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 LP |
3066 | if (r < 0) |
3067 | goto fail; | |
3068 | } | |
3069 | ||
3070 | return pid_set; | |
3071 | ||
3072 | fail: | |
3073 | set_free(pid_set); | |
3074 | return NULL; | |
3075 | } | |
3076 | ||
d91c34f2 LP |
3077 | int unit_kill_common( |
3078 | Unit *u, | |
3079 | KillWho who, | |
3080 | int signo, | |
3081 | pid_t main_pid, | |
3082 | pid_t control_pid, | |
718db961 | 3083 | sd_bus_error *error) { |
d91c34f2 | 3084 | |
814cc562 | 3085 | int r = 0; |
ac5e3a50 | 3086 | bool killed = false; |
814cc562 | 3087 | |
ac5e3a50 | 3088 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3089 | if (main_pid < 0) |
7358dc02 | 3090 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 3091 | else if (main_pid == 0) |
7358dc02 | 3092 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3093 | } |
3094 | ||
ac5e3a50 | 3095 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3096 | if (control_pid < 0) |
7358dc02 | 3097 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 3098 | else if (control_pid == 0) |
7358dc02 | 3099 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3100 | } |
3101 | ||
ac5e3a50 JS |
3102 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3103 | if (control_pid > 0) { | |
814cc562 MS |
3104 | if (kill(control_pid, signo) < 0) |
3105 | r = -errno; | |
ac5e3a50 JS |
3106 | else |
3107 | killed = true; | |
3108 | } | |
814cc562 | 3109 | |
ac5e3a50 JS |
3110 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3111 | if (main_pid > 0) { | |
814cc562 MS |
3112 | if (kill(main_pid, signo) < 0) |
3113 | r = -errno; | |
ac5e3a50 JS |
3114 | else |
3115 | killed = true; | |
3116 | } | |
814cc562 | 3117 | |
ac5e3a50 | 3118 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3119 | _cleanup_set_free_ Set *pid_set = NULL; |
3120 | int q; | |
3121 | ||
82659fd7 LP |
3122 | /* Exclude the main/control pids from being killed via the cgroup */ |
3123 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3124 | if (!pid_set) |
3125 | return -ENOMEM; | |
3126 | ||
d0667321 | 3127 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, false, false, pid_set); |
814cc562 MS |
3128 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
3129 | r = q; | |
ac5e3a50 JS |
3130 | else |
3131 | killed = true; | |
814cc562 MS |
3132 | } |
3133 | ||
ac5e3a50 JS |
3134 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL, KILL_ALL_FAIL)) |
3135 | return -ESRCH; | |
3136 | ||
814cc562 MS |
3137 | return r; |
3138 | } | |
3139 | ||
6210e7fc LP |
3140 | int unit_following_set(Unit *u, Set **s) { |
3141 | assert(u); | |
3142 | assert(s); | |
3143 | ||
3144 | if (UNIT_VTABLE(u)->following_set) | |
3145 | return UNIT_VTABLE(u)->following_set(u, s); | |
3146 | ||
3147 | *s = NULL; | |
3148 | return 0; | |
3149 | } | |
3150 | ||
a4375746 LP |
3151 | UnitFileState unit_get_unit_file_state(Unit *u) { |
3152 | assert(u); | |
3153 | ||
ac155bb8 MS |
3154 | if (u->unit_file_state < 0 && u->fragment_path) |
3155 | u->unit_file_state = unit_file_get_state( | |
b2c23da8 | 3156 | u->manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
2b6bf07d | 3157 | NULL, basename(u->fragment_path)); |
a4375746 | 3158 | |
ac155bb8 | 3159 | return u->unit_file_state; |
a4375746 LP |
3160 | } |
3161 | ||
d2dc52db LP |
3162 | int unit_get_unit_file_preset(Unit *u) { |
3163 | assert(u); | |
3164 | ||
3165 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3166 | u->unit_file_preset = unit_file_query_preset( | |
b2c23da8 | 3167 | u->manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
d2dc52db LP |
3168 | NULL, basename(u->fragment_path)); |
3169 | ||
3170 | return u->unit_file_preset; | |
3171 | } | |
3172 | ||
57020a3a LP |
3173 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
3174 | assert(ref); | |
3175 | assert(u); | |
3176 | ||
3177 | if (ref->unit) | |
3178 | unit_ref_unset(ref); | |
3179 | ||
3180 | ref->unit = u; | |
71fda00f | 3181 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
3182 | return u; |
3183 | } | |
3184 | ||
3185 | void unit_ref_unset(UnitRef *ref) { | |
3186 | assert(ref); | |
3187 | ||
3188 | if (!ref->unit) | |
3189 | return; | |
3190 | ||
71fda00f | 3191 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
3192 | ref->unit = NULL; |
3193 | } | |
3194 | ||
598459ce LP |
3195 | int unit_patch_contexts(Unit *u) { |
3196 | CGroupContext *cc; | |
3197 | ExecContext *ec; | |
cba6e062 LP |
3198 | unsigned i; |
3199 | int r; | |
3200 | ||
e06c73cc | 3201 | assert(u); |
e06c73cc | 3202 | |
598459ce LP |
3203 | /* Patch in the manager defaults into the exec and cgroup |
3204 | * contexts, _after_ the rest of the settings have been | |
3205 | * initialized */ | |
085afe36 | 3206 | |
598459ce LP |
3207 | ec = unit_get_exec_context(u); |
3208 | if (ec) { | |
3209 | /* This only copies in the ones that need memory */ | |
3210 | for (i = 0; i < _RLIMIT_MAX; i++) | |
3211 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
3212 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
3213 | if (!ec->rlimit[i]) | |
3214 | return -ENOMEM; | |
3215 | } | |
3216 | ||
b2c23da8 | 3217 | if (u->manager->running_as == MANAGER_USER && |
598459ce LP |
3218 | !ec->working_directory) { |
3219 | ||
3220 | r = get_home_dir(&ec->working_directory); | |
3221 | if (r < 0) | |
3222 | return r; | |
4c08c824 LP |
3223 | |
3224 | /* Allow user services to run, even if the | |
3225 | * home directory is missing */ | |
3226 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
3227 | } |
3228 | ||
b2c23da8 | 3229 | if (u->manager->running_as == MANAGER_USER && |
598459ce LP |
3230 | (ec->syscall_whitelist || |
3231 | !set_isempty(ec->syscall_filter) || | |
3232 | !set_isempty(ec->syscall_archs) || | |
3233 | ec->address_families_whitelist || | |
3234 | !set_isempty(ec->address_families))) | |
3235 | ec->no_new_privileges = true; | |
e06c73cc | 3236 | |
598459ce LP |
3237 | if (ec->private_devices) |
3238 | ec->capability_bounding_set_drop |= (uint64_t) 1ULL << (uint64_t) CAP_MKNOD; | |
cba6e062 LP |
3239 | } |
3240 | ||
598459ce LP |
3241 | cc = unit_get_cgroup_context(u); |
3242 | if (cc) { | |
f513e420 | 3243 | |
598459ce LP |
3244 | if (ec && |
3245 | ec->private_devices && | |
3246 | cc->device_policy == CGROUP_AUTO) | |
3247 | cc->device_policy = CGROUP_CLOSED; | |
3248 | } | |
f1660f96 | 3249 | |
cba6e062 | 3250 | return 0; |
e06c73cc LP |
3251 | } |
3252 | ||
3ef63c31 LP |
3253 | ExecContext *unit_get_exec_context(Unit *u) { |
3254 | size_t offset; | |
3255 | assert(u); | |
3256 | ||
598459ce LP |
3257 | if (u->type < 0) |
3258 | return NULL; | |
3259 | ||
3ef63c31 LP |
3260 | offset = UNIT_VTABLE(u)->exec_context_offset; |
3261 | if (offset <= 0) | |
3262 | return NULL; | |
3263 | ||
3264 | return (ExecContext*) ((uint8_t*) u + offset); | |
3265 | } | |
3266 | ||
718db961 LP |
3267 | KillContext *unit_get_kill_context(Unit *u) { |
3268 | size_t offset; | |
3269 | assert(u); | |
3270 | ||
598459ce LP |
3271 | if (u->type < 0) |
3272 | return NULL; | |
3273 | ||
718db961 LP |
3274 | offset = UNIT_VTABLE(u)->kill_context_offset; |
3275 | if (offset <= 0) | |
3276 | return NULL; | |
3277 | ||
3278 | return (KillContext*) ((uint8_t*) u + offset); | |
3279 | } | |
3280 | ||
4ad49000 LP |
3281 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
3282 | size_t offset; | |
3283 | ||
598459ce LP |
3284 | if (u->type < 0) |
3285 | return NULL; | |
3286 | ||
4ad49000 LP |
3287 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
3288 | if (offset <= 0) | |
3289 | return NULL; | |
3290 | ||
3291 | return (CGroupContext*) ((uint8_t*) u + offset); | |
3292 | } | |
3293 | ||
613b411c LP |
3294 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
3295 | size_t offset; | |
3296 | ||
598459ce LP |
3297 | if (u->type < 0) |
3298 | return NULL; | |
3299 | ||
613b411c LP |
3300 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
3301 | if (offset <= 0) | |
3302 | return NULL; | |
3303 | ||
3304 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
3305 | } | |
3306 | ||
29686440 | 3307 | static int unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode, bool transient, char **dir) { |
3f5e8115 LP |
3308 | assert(u); |
3309 | ||
b2c23da8 | 3310 | if (u->manager->running_as == MANAGER_USER) { |
29686440 | 3311 | int r; |
26d04f86 | 3312 | |
718880ba SA |
3313 | if (mode == UNIT_PERSISTENT && !transient) |
3314 | r = user_config_home(dir); | |
3315 | else | |
4d5dec23 | 3316 | r = user_runtime_dir(dir); |
26d04f86 LP |
3317 | if (r == 0) |
3318 | return -ENOENT; | |
3f5e8115 | 3319 | |
29686440 ZJS |
3320 | return r; |
3321 | } | |
26d04f86 | 3322 | |
29686440 ZJS |
3323 | if (mode == UNIT_PERSISTENT && !transient) |
3324 | *dir = strdup("/etc/systemd/system"); | |
8e2af478 | 3325 | else |
29686440 ZJS |
3326 | *dir = strdup("/run/systemd/system"); |
3327 | if (!*dir) | |
71645aca LP |
3328 | return -ENOMEM; |
3329 | ||
26d04f86 | 3330 | return 0; |
71645aca LP |
3331 | } |
3332 | ||
8e2af478 | 3333 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
29686440 | 3334 | |
adb76a70 | 3335 | _cleanup_free_ char *dir = NULL, *p = NULL, *q = NULL; |
26d04f86 | 3336 | int r; |
71645aca LP |
3337 | |
3338 | assert(u); | |
3339 | ||
6d235724 | 3340 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3341 | return 0; |
3342 | ||
29686440 | 3343 | r = unit_drop_in_dir(u, mode, u->transient, &dir); |
26d04f86 LP |
3344 | if (r < 0) |
3345 | return r; | |
71645aca | 3346 | |
adb76a70 WC |
3347 | r = write_drop_in(dir, u->id, 50, name, data); |
3348 | if (r < 0) | |
3349 | return r; | |
3350 | ||
3351 | r = drop_in_file(dir, u->id, 50, name, &p, &q); | |
3352 | if (r < 0) | |
3353 | return r; | |
3354 | ||
3355 | r = strv_extend(&u->dropin_paths, q); | |
3356 | if (r < 0) | |
3357 | return r; | |
3358 | ||
3359 | strv_sort(u->dropin_paths); | |
3360 | strv_uniq(u->dropin_paths); | |
3361 | ||
3362 | u->dropin_mtime = now(CLOCK_REALTIME); | |
3363 | ||
3364 | return 0; | |
26d04f86 | 3365 | } |
71645aca | 3366 | |
b9ec9359 LP |
3367 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3368 | _cleanup_free_ char *p = NULL; | |
3369 | va_list ap; | |
3370 | int r; | |
3371 | ||
3372 | assert(u); | |
3373 | assert(name); | |
3374 | assert(format); | |
3375 | ||
6d235724 | 3376 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3377 | return 0; |
3378 | ||
3379 | va_start(ap, format); | |
3380 | r = vasprintf(&p, format, ap); | |
3381 | va_end(ap); | |
3382 | ||
3383 | if (r < 0) | |
3384 | return -ENOMEM; | |
3385 | ||
3386 | return unit_write_drop_in(u, mode, name, p); | |
3387 | } | |
3388 | ||
3389 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
b42defe3 LP |
3390 | _cleanup_free_ char *ndata = NULL; |
3391 | ||
3392 | assert(u); | |
3393 | assert(name); | |
3394 | assert(data); | |
3395 | ||
3396 | if (!UNIT_VTABLE(u)->private_section) | |
3397 | return -EINVAL; | |
3398 | ||
6d235724 | 3399 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3400 | return 0; |
3401 | ||
b42defe3 LP |
3402 | ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL); |
3403 | if (!ndata) | |
3404 | return -ENOMEM; | |
3405 | ||
3406 | return unit_write_drop_in(u, mode, name, ndata); | |
3407 | } | |
3408 | ||
b9ec9359 LP |
3409 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3410 | _cleanup_free_ char *p = NULL; | |
3411 | va_list ap; | |
3412 | int r; | |
3413 | ||
3414 | assert(u); | |
3415 | assert(name); | |
3416 | assert(format); | |
3417 | ||
6d235724 | 3418 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3419 | return 0; |
3420 | ||
3421 | va_start(ap, format); | |
3422 | r = vasprintf(&p, format, ap); | |
3423 | va_end(ap); | |
3424 | ||
3425 | if (r < 0) | |
3426 | return -ENOMEM; | |
3427 | ||
3428 | return unit_write_drop_in_private(u, mode, name, p); | |
3429 | } | |
71645aca | 3430 | |
c2756a68 | 3431 | int unit_make_transient(Unit *u) { |
c2756a68 LP |
3432 | assert(u); |
3433 | ||
3f5e8115 LP |
3434 | if (!UNIT_VTABLE(u)->can_transient) |
3435 | return -EOPNOTSUPP; | |
3436 | ||
c2756a68 LP |
3437 | u->load_state = UNIT_STUB; |
3438 | u->load_error = 0; | |
3439 | u->transient = true; | |
3f5e8115 | 3440 | u->fragment_path = mfree(u->fragment_path); |
c2756a68 | 3441 | |
3f5e8115 | 3442 | return 0; |
c2756a68 LP |
3443 | } |
3444 | ||
cd2086fe LP |
3445 | int unit_kill_context( |
3446 | Unit *u, | |
3447 | KillContext *c, | |
db2cb23b | 3448 | KillOperation k, |
cd2086fe LP |
3449 | pid_t main_pid, |
3450 | pid_t control_pid, | |
3451 | bool main_pid_alien) { | |
3452 | ||
b821a397 LP |
3453 | bool wait_for_exit = false; |
3454 | int sig, r; | |
cd2086fe LP |
3455 | |
3456 | assert(u); | |
3457 | assert(c); | |
3458 | ||
3459 | if (c->kill_mode == KILL_NONE) | |
3460 | return 0; | |
3461 | ||
db2cb23b UTL |
3462 | switch (k) { |
3463 | case KILL_KILL: | |
3464 | sig = SIGKILL; | |
3465 | break; | |
3466 | case KILL_ABORT: | |
3467 | sig = SIGABRT; | |
3468 | break; | |
3469 | case KILL_TERMINATE: | |
3470 | sig = c->kill_signal; | |
3471 | break; | |
3472 | default: | |
3473 | assert_not_reached("KillOperation unknown"); | |
3474 | } | |
cd2086fe LP |
3475 | |
3476 | if (main_pid > 0) { | |
3477 | r = kill_and_sigcont(main_pid, sig); | |
3478 | ||
3479 | if (r < 0 && r != -ESRCH) { | |
3480 | _cleanup_free_ char *comm = NULL; | |
3481 | get_process_comm(main_pid, &comm); | |
3482 | ||
b821a397 | 3483 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 3484 | } else { |
bc6aed7b LP |
3485 | if (!main_pid_alien) |
3486 | wait_for_exit = true; | |
82659fd7 | 3487 | |
d0667321 LP |
3488 | if (c->send_sighup && k == KILL_TERMINATE) |
3489 | (void) kill(main_pid, SIGHUP); | |
82659fd7 | 3490 | } |
cd2086fe LP |
3491 | } |
3492 | ||
3493 | if (control_pid > 0) { | |
3494 | r = kill_and_sigcont(control_pid, sig); | |
3495 | ||
3496 | if (r < 0 && r != -ESRCH) { | |
3497 | _cleanup_free_ char *comm = NULL; | |
3498 | get_process_comm(control_pid, &comm); | |
3499 | ||
b821a397 | 3500 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 3501 | } else { |
cd2086fe | 3502 | wait_for_exit = true; |
82659fd7 | 3503 | |
d0667321 LP |
3504 | if (c->send_sighup && k == KILL_TERMINATE) |
3505 | (void) kill(control_pid, SIGHUP); | |
82659fd7 | 3506 | } |
cd2086fe LP |
3507 | } |
3508 | ||
b821a397 LP |
3509 | if (u->cgroup_path && |
3510 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
3511 | _cleanup_set_free_ Set *pid_set = NULL; |
3512 | ||
82659fd7 LP |
3513 | /* Exclude the main/control pids from being killed via the cgroup */ |
3514 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
3515 | if (!pid_set) |
3516 | return -ENOMEM; | |
3517 | ||
d0667321 | 3518 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, k != KILL_TERMINATE, false, pid_set); |
cd2086fe LP |
3519 | if (r < 0) { |
3520 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
b821a397 LP |
3521 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
3522 | ||
82659fd7 | 3523 | } else if (r > 0) { |
bc6aed7b | 3524 | |
efdb0237 LP |
3525 | /* FIXME: For now, on the legacy hierarchy, we |
3526 | * will not wait for the cgroup members to die | |
3527 | * if we are running in a container or if this | |
3528 | * is a delegation unit, simply because cgroup | |
3529 | * notification is unreliable in these | |
3530 | * cases. It doesn't work at all in | |
3531 | * containers, and outside of containers it | |
3532 | * can be confused easily by left-over | |
3533 | * directories in the cgroup -- which however | |
3534 | * should not exist in non-delegated units. On | |
3535 | * the unified hierarchy that's different, | |
3536 | * there we get proper events. Hence rely on | |
3537 | * them.*/ | |
3538 | ||
3539 | if (cg_unified() > 0 || | |
75f86906 | 3540 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 3541 | wait_for_exit = true; |
58ea275a | 3542 | |
db2cb23b | 3543 | if (c->send_sighup && k != KILL_KILL) { |
82659fd7 LP |
3544 | set_free(pid_set); |
3545 | ||
3546 | pid_set = unit_pid_set(main_pid, control_pid); | |
3547 | if (!pid_set) | |
3548 | return -ENOMEM; | |
3549 | ||
8190da36 | 3550 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, false, true, false, pid_set); |
82659fd7 LP |
3551 | } |
3552 | } | |
cd2086fe LP |
3553 | } |
3554 | ||
3555 | return wait_for_exit; | |
3556 | } | |
3557 | ||
a57f7e2c LP |
3558 | int unit_require_mounts_for(Unit *u, const char *path) { |
3559 | char prefix[strlen(path) + 1], *p; | |
3560 | int r; | |
3561 | ||
3562 | assert(u); | |
3563 | assert(path); | |
3564 | ||
3565 | /* Registers a unit for requiring a certain path and all its | |
3566 | * prefixes. We keep a simple array of these paths in the | |
3567 | * unit, since its usually short. However, we build a prefix | |
3568 | * table for all possible prefixes so that new appearing mount | |
3569 | * units can easily determine which units to make themselves a | |
3570 | * dependency of. */ | |
3571 | ||
70b64bd3 ZJS |
3572 | if (!path_is_absolute(path)) |
3573 | return -EINVAL; | |
3574 | ||
a57f7e2c LP |
3575 | p = strdup(path); |
3576 | if (!p) | |
3577 | return -ENOMEM; | |
3578 | ||
3579 | path_kill_slashes(p); | |
3580 | ||
a57f7e2c LP |
3581 | if (!path_is_safe(p)) { |
3582 | free(p); | |
3583 | return -EPERM; | |
3584 | } | |
3585 | ||
3586 | if (strv_contains(u->requires_mounts_for, p)) { | |
3587 | free(p); | |
3588 | return 0; | |
3589 | } | |
3590 | ||
6e18964d ZJS |
3591 | r = strv_consume(&u->requires_mounts_for, p); |
3592 | if (r < 0) | |
a57f7e2c | 3593 | return r; |
a57f7e2c LP |
3594 | |
3595 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
3596 | Set *x; | |
3597 | ||
3598 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
3599 | if (!x) { | |
3600 | char *q; | |
3601 | ||
742f41ad LP |
3602 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &string_hash_ops); |
3603 | if (r < 0) | |
3604 | return r; | |
a57f7e2c LP |
3605 | |
3606 | q = strdup(prefix); | |
3607 | if (!q) | |
3608 | return -ENOMEM; | |
3609 | ||
d5099efc | 3610 | x = set_new(NULL); |
a57f7e2c LP |
3611 | if (!x) { |
3612 | free(q); | |
3613 | return -ENOMEM; | |
3614 | } | |
3615 | ||
3616 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
3617 | if (r < 0) { | |
3618 | free(q); | |
3619 | set_free(x); | |
3620 | return r; | |
3621 | } | |
3622 | } | |
3623 | ||
3624 | r = set_put(x, u); | |
3625 | if (r < 0) | |
3626 | return r; | |
3627 | } | |
3628 | ||
3629 | return 0; | |
3630 | } | |
3631 | ||
613b411c LP |
3632 | int unit_setup_exec_runtime(Unit *u) { |
3633 | ExecRuntime **rt; | |
3634 | size_t offset; | |
3635 | Iterator i; | |
3636 | Unit *other; | |
3637 | ||
3638 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3639 | assert(offset > 0); | |
3640 | ||
06b643e7 | 3641 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
3642 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
3643 | if (*rt) | |
3644 | return 0; | |
3645 | ||
3646 | /* Try to get it from somebody else */ | |
3647 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
3648 | ||
3649 | *rt = unit_get_exec_runtime(other); | |
3650 | if (*rt) { | |
3651 | exec_runtime_ref(*rt); | |
3652 | return 0; | |
3653 | } | |
3654 | } | |
3655 | ||
3656 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
3657 | } | |
3658 | ||
1c2e9646 LP |
3659 | bool unit_type_supported(UnitType t) { |
3660 | if (_unlikely_(t < 0)) | |
3661 | return false; | |
3662 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
3663 | return false; | |
3664 | ||
3665 | if (!unit_vtable[t]->supported) | |
3666 | return true; | |
3667 | ||
3668 | return unit_vtable[t]->supported(); | |
3669 | } | |
3670 | ||
8b4305c7 LP |
3671 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
3672 | int r; | |
3673 | ||
3674 | assert(u); | |
3675 | assert(where); | |
3676 | ||
3677 | r = dir_is_empty(where); | |
3678 | if (r > 0) | |
3679 | return; | |
3680 | if (r < 0) { | |
3681 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
3682 | return; | |
3683 | } | |
3684 | ||
3685 | log_struct(LOG_NOTICE, | |
3686 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3687 | LOG_UNIT_ID(u), | |
3688 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
3689 | "WHERE=%s", where, | |
3690 | NULL); | |
3691 | } | |
3692 | ||
3693 | int unit_fail_if_symlink(Unit *u, const char* where) { | |
3694 | int r; | |
3695 | ||
3696 | assert(u); | |
3697 | assert(where); | |
3698 | ||
3699 | r = is_symlink(where); | |
3700 | if (r < 0) { | |
3701 | log_unit_debug_errno(u, r, "Failed to check symlink %s, ignoring: %m", where); | |
3702 | return 0; | |
3703 | } | |
3704 | if (r == 0) | |
3705 | return 0; | |
3706 | ||
3707 | log_struct(LOG_ERR, | |
3708 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3709 | LOG_UNIT_ID(u), | |
3710 | LOG_UNIT_MESSAGE(u, "Mount on symlink %s not allowed.", where), | |
3711 | "WHERE=%s", where, | |
3712 | NULL); | |
3713 | ||
3714 | return -ELOOP; | |
3715 | } |