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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 | 30 | |
b5efdb8a | 31 | #include "alloc-util.h" |
4f5dd394 LP |
32 | #include "bus-common-errors.h" |
33 | #include "bus-util.h" | |
c6c18be3 | 34 | #include "cgroup-util.h" |
4f5dd394 LP |
35 | #include "dbus-unit.h" |
36 | #include "dbus.h" | |
37 | #include "dropin.h" | |
38 | #include "escape.h" | |
39 | #include "execute.h" | |
a5c32cff | 40 | #include "fileio-label.h" |
6482f626 | 41 | #include "formats-util.h" |
4f5dd394 LP |
42 | #include "load-dropin.h" |
43 | #include "load-fragment.h" | |
44 | #include "log.h" | |
45 | #include "macro.h" | |
46 | #include "missing.h" | |
47 | #include "mkdir.h" | |
6bedfcbb | 48 | #include "parse-util.h" |
4f5dd394 | 49 | #include "path-util.h" |
0b452006 | 50 | #include "process-util.h" |
4f5dd394 | 51 | #include "set.h" |
e9db43d5 | 52 | #include "special.h" |
8fcde012 | 53 | #include "stat-util.h" |
07630cea | 54 | #include "string-util.h" |
4f5dd394 LP |
55 | #include "strv.h" |
56 | #include "unit-name.h" | |
e9db43d5 | 57 | #include "unit.h" |
b1d4f8e1 LP |
58 | #include "user-util.h" |
59 | #include "virt.h" | |
87f0e418 LP |
60 | |
61 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
62 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 | 63 | [UNIT_SOCKET] = &socket_vtable, |
e821075a | 64 | [UNIT_BUSNAME] = &busname_vtable, |
87f0e418 LP |
65 | [UNIT_TARGET] = &target_vtable, |
66 | [UNIT_DEVICE] = &device_vtable, | |
67 | [UNIT_MOUNT] = &mount_vtable, | |
68 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 69 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 70 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 71 | [UNIT_PATH] = &path_vtable, |
6c12b52e LP |
72 | [UNIT_SLICE] = &slice_vtable, |
73 | [UNIT_SCOPE] = &scope_vtable | |
87f0e418 LP |
74 | }; |
75 | ||
f2341e0a | 76 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 77 | |
7d17cfbc | 78 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
79 | Unit *u; |
80 | ||
81 | assert(m); | |
ac155bb8 | 82 | assert(size >= sizeof(Unit)); |
87f0e418 | 83 | |
7d17cfbc MS |
84 | u = malloc0(size); |
85 | if (!u) | |
87f0e418 LP |
86 | return NULL; |
87 | ||
d5099efc | 88 | u->names = set_new(&string_hash_ops); |
ac155bb8 | 89 | if (!u->names) { |
87f0e418 LP |
90 | free(u); |
91 | return NULL; | |
92 | } | |
93 | ||
ac155bb8 MS |
94 | u->manager = m; |
95 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
96 | u->default_dependencies = true; |
97 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 98 | u->unit_file_preset = -1; |
d420282b | 99 | u->on_failure_job_mode = JOB_REPLACE; |
efdb0237 | 100 | u->cgroup_inotify_wd = -1; |
87f0e418 | 101 | |
67bfdc97 | 102 | RATELIMIT_INIT(u->auto_stop_ratelimit, 10 * USEC_PER_SEC, 16); |
bea355da | 103 | |
87f0e418 LP |
104 | return u; |
105 | } | |
106 | ||
f278026d LP |
107 | bool unit_has_name(Unit *u, const char *name) { |
108 | assert(u); | |
109 | assert(name); | |
110 | ||
ac155bb8 | 111 | return !!set_get(u->names, (char*) name); |
f278026d LP |
112 | } |
113 | ||
598459ce LP |
114 | static void unit_init(Unit *u) { |
115 | CGroupContext *cc; | |
116 | ExecContext *ec; | |
117 | KillContext *kc; | |
118 | ||
119 | assert(u); | |
120 | assert(u->manager); | |
121 | assert(u->type >= 0); | |
122 | ||
123 | cc = unit_get_cgroup_context(u); | |
124 | if (cc) { | |
125 | cgroup_context_init(cc); | |
126 | ||
127 | /* Copy in the manager defaults into the cgroup | |
128 | * context, _before_ the rest of the settings have | |
129 | * been initialized */ | |
130 | ||
131 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
132 | cc->blockio_accounting = u->manager->default_blockio_accounting; | |
133 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 134 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
0af20ea2 LP |
135 | |
136 | if (u->type != UNIT_SLICE) | |
137 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
138 | } |
139 | ||
140 | ec = unit_get_exec_context(u); | |
141 | if (ec) | |
142 | exec_context_init(ec); | |
143 | ||
144 | kc = unit_get_kill_context(u); | |
145 | if (kc) | |
146 | kill_context_init(kc); | |
147 | ||
148 | if (UNIT_VTABLE(u)->init) | |
149 | UNIT_VTABLE(u)->init(u); | |
150 | } | |
151 | ||
87f0e418 | 152 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 153 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 154 | UnitType t; |
87f0e418 LP |
155 | int r; |
156 | ||
157 | assert(u); | |
158 | assert(text); | |
159 | ||
7410616c | 160 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 161 | |
ac155bb8 | 162 | if (!u->instance) |
9e2f7c11 | 163 | return -EINVAL; |
87f0e418 | 164 | |
7410616c LP |
165 | r = unit_name_replace_instance(text, u->instance, &s); |
166 | if (r < 0) | |
167 | return r; | |
168 | } else { | |
9e2f7c11 | 169 | s = strdup(text); |
7410616c LP |
170 | if (!s) |
171 | return -ENOMEM; | |
172 | } | |
87f0e418 | 173 | |
7410616c LP |
174 | if (set_contains(u->names, s)) |
175 | return 0; | |
176 | if (hashmap_contains(u->manager->units, s)) | |
177 | return -EEXIST; | |
178 | ||
179 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 180 | return -EINVAL; |
e537352b | 181 | |
7410616c LP |
182 | t = unit_name_to_type(s); |
183 | if (t < 0) | |
184 | return -EINVAL; | |
87f0e418 | 185 | |
598459ce LP |
186 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
187 | return -EINVAL; | |
87f0e418 | 188 | |
e48614c4 ZJS |
189 | r = unit_name_to_instance(s, &i); |
190 | if (r < 0) | |
598459ce | 191 | return r; |
87f0e418 | 192 | |
598459ce LP |
193 | if (i && unit_vtable[t]->no_instances) |
194 | return -EINVAL; | |
9e2f7c11 | 195 | |
276c3e78 | 196 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
197 | * but not both. Note that we do allow names with different |
198 | * instance names however! */ | |
598459ce LP |
199 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
200 | return -EINVAL; | |
9e2f7c11 | 201 | |
7410616c | 202 | if (unit_vtable[t]->no_alias && !set_isempty(u->names)) |
598459ce | 203 | return -EEXIST; |
9e2f7c11 | 204 | |
598459ce LP |
205 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
206 | return -E2BIG; | |
4f0f902f | 207 | |
e48614c4 | 208 | r = set_put(u->names, s); |
7410616c | 209 | if (r < 0) |
598459ce | 210 | return r; |
7410616c | 211 | assert(r > 0); |
87f0e418 | 212 | |
e48614c4 ZJS |
213 | r = hashmap_put(u->manager->units, s, u); |
214 | if (r < 0) { | |
7410616c | 215 | (void) set_remove(u->names, s); |
598459ce | 216 | return r; |
87f0e418 LP |
217 | } |
218 | ||
ac155bb8 | 219 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
220 | u->type = t; |
221 | u->id = s; | |
222 | u->instance = i; | |
9e2f7c11 | 223 | |
71fda00f | 224 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 225 | |
598459ce | 226 | unit_init(u); |
87f0e418 | 227 | |
598459ce LP |
228 | i = NULL; |
229 | } | |
9e2f7c11 | 230 | |
598459ce | 231 | s = NULL; |
9e2f7c11 | 232 | |
598459ce LP |
233 | unit_add_to_dbus_queue(u); |
234 | return 0; | |
87f0e418 LP |
235 | } |
236 | ||
0ae97ec1 | 237 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 238 | _cleanup_free_ char *t = NULL; |
598459ce | 239 | char *s, *i; |
276c3e78 | 240 | int r; |
0ae97ec1 LP |
241 | |
242 | assert(u); | |
243 | assert(name); | |
244 | ||
7410616c | 245 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 246 | |
ac155bb8 | 247 | if (!u->instance) |
9e2f7c11 LP |
248 | return -EINVAL; |
249 | ||
7410616c LP |
250 | r = unit_name_replace_instance(name, u->instance, &t); |
251 | if (r < 0) | |
252 | return r; | |
9e2f7c11 LP |
253 | |
254 | name = t; | |
255 | } | |
256 | ||
0ae97ec1 | 257 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 258 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 259 | if (!s) |
0ae97ec1 LP |
260 | return -ENOENT; |
261 | ||
7410616c | 262 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
263 | r = unit_name_to_instance(s, &i); |
264 | if (r < 0) | |
276c3e78 LP |
265 | return r; |
266 | ||
ac155bb8 | 267 | u->id = s; |
276c3e78 | 268 | |
ac155bb8 MS |
269 | free(u->instance); |
270 | u->instance = i; | |
276c3e78 | 271 | |
c1e1601e | 272 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 273 | |
0ae97ec1 LP |
274 | return 0; |
275 | } | |
276 | ||
f50e0a01 LP |
277 | int unit_set_description(Unit *u, const char *description) { |
278 | char *s; | |
279 | ||
280 | assert(u); | |
281 | ||
8aec412f LP |
282 | if (isempty(description)) |
283 | s = NULL; | |
284 | else { | |
285 | s = strdup(description); | |
286 | if (!s) | |
287 | return -ENOMEM; | |
288 | } | |
f50e0a01 | 289 | |
ac155bb8 MS |
290 | free(u->description); |
291 | u->description = s; | |
c1e1601e LP |
292 | |
293 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
294 | return 0; |
295 | } | |
296 | ||
701cc384 | 297 | bool unit_check_gc(Unit *u) { |
a354329f | 298 | UnitActiveState state; |
701cc384 LP |
299 | assert(u); |
300 | ||
a354329f | 301 | if (u->job) |
701cc384 LP |
302 | return true; |
303 | ||
a354329f | 304 | if (u->nop_job) |
6c073082 LP |
305 | return true; |
306 | ||
a354329f LP |
307 | state = unit_active_state(u); |
308 | ||
309 | /* If the unit is inactive and failed and no job is queued for | |
310 | * it, then release its runtime resources */ | |
311 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && | |
312 | UNIT_VTABLE(u)->release_resources) | |
313 | UNIT_VTABLE(u)->release_resources(u); | |
314 | ||
315 | /* But we keep the unit object around for longer when it is | |
316 | * referenced or configured to not be gc'ed */ | |
317 | if (state != UNIT_INACTIVE) | |
701cc384 LP |
318 | return true; |
319 | ||
a354329f | 320 | if (u->no_gc) |
701cc384 LP |
321 | return true; |
322 | ||
9d576438 LP |
323 | if (u->refs) |
324 | return true; | |
325 | ||
701cc384 LP |
326 | if (UNIT_VTABLE(u)->check_gc) |
327 | if (UNIT_VTABLE(u)->check_gc(u)) | |
328 | return true; | |
329 | ||
330 | return false; | |
331 | } | |
332 | ||
87f0e418 LP |
333 | void unit_add_to_load_queue(Unit *u) { |
334 | assert(u); | |
ac155bb8 | 335 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 336 | |
ac155bb8 | 337 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
338 | return; |
339 | ||
71fda00f | 340 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 341 | u->in_load_queue = true; |
87f0e418 LP |
342 | } |
343 | ||
23a177ef LP |
344 | void unit_add_to_cleanup_queue(Unit *u) { |
345 | assert(u); | |
346 | ||
ac155bb8 | 347 | if (u->in_cleanup_queue) |
23a177ef LP |
348 | return; |
349 | ||
71fda00f | 350 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 351 | u->in_cleanup_queue = true; |
23a177ef LP |
352 | } |
353 | ||
701cc384 LP |
354 | void unit_add_to_gc_queue(Unit *u) { |
355 | assert(u); | |
356 | ||
ac155bb8 | 357 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
358 | return; |
359 | ||
360 | if (unit_check_gc(u)) | |
361 | return; | |
362 | ||
71fda00f | 363 | LIST_PREPEND(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 364 | u->in_gc_queue = true; |
701cc384 | 365 | |
ac155bb8 | 366 | u->manager->n_in_gc_queue ++; |
701cc384 LP |
367 | } |
368 | ||
c1e1601e LP |
369 | void unit_add_to_dbus_queue(Unit *u) { |
370 | assert(u); | |
ac155bb8 | 371 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 372 | |
ac155bb8 | 373 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
374 | return; |
375 | ||
a567261a | 376 | /* Shortcut things if nobody cares */ |
8f8f05a9 LP |
377 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
378 | set_isempty(u->manager->private_buses)) { | |
ac155bb8 | 379 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
380 | return; |
381 | } | |
382 | ||
71fda00f | 383 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 384 | u->in_dbus_queue = true; |
c1e1601e LP |
385 | } |
386 | ||
87f0e418 LP |
387 | static void bidi_set_free(Unit *u, Set *s) { |
388 | Iterator i; | |
389 | Unit *other; | |
390 | ||
391 | assert(u); | |
392 | ||
393 | /* Frees the set and makes sure we are dropped from the | |
394 | * inverse pointers */ | |
395 | ||
396 | SET_FOREACH(other, s, i) { | |
397 | UnitDependency d; | |
398 | ||
399 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 400 | set_remove(other->dependencies[d], u); |
701cc384 LP |
401 | |
402 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
403 | } |
404 | ||
405 | set_free(s); | |
406 | } | |
407 | ||
c2756a68 LP |
408 | static void unit_remove_transient(Unit *u) { |
409 | char **i; | |
410 | ||
411 | assert(u); | |
412 | ||
413 | if (!u->transient) | |
414 | return; | |
415 | ||
416 | if (u->fragment_path) | |
3f5e8115 | 417 | (void) unlink(u->fragment_path); |
c2756a68 LP |
418 | |
419 | STRV_FOREACH(i, u->dropin_paths) { | |
420 | _cleanup_free_ char *p = NULL; | |
c2756a68 | 421 | |
3f5e8115 | 422 | (void) unlink(*i); |
c2756a68 | 423 | |
5f311f8c LP |
424 | p = dirname_malloc(*i); |
425 | if (p) | |
3f5e8115 | 426 | (void) rmdir(p); |
c2756a68 LP |
427 | } |
428 | } | |
429 | ||
a57f7e2c LP |
430 | static void unit_free_requires_mounts_for(Unit *u) { |
431 | char **j; | |
432 | ||
433 | STRV_FOREACH(j, u->requires_mounts_for) { | |
434 | char s[strlen(*j) + 1]; | |
435 | ||
436 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
437 | char *y; | |
438 | Set *x; | |
439 | ||
440 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
441 | if (!x) | |
442 | continue; | |
443 | ||
444 | set_remove(x, u); | |
445 | ||
446 | if (set_isempty(x)) { | |
447 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
448 | free(y); | |
449 | set_free(x); | |
450 | } | |
451 | } | |
452 | } | |
453 | ||
6796073e | 454 | u->requires_mounts_for = strv_free(u->requires_mounts_for); |
a57f7e2c LP |
455 | } |
456 | ||
598459ce LP |
457 | static void unit_done(Unit *u) { |
458 | ExecContext *ec; | |
459 | CGroupContext *cc; | |
32ee7d33 | 460 | int r; |
598459ce LP |
461 | |
462 | assert(u); | |
463 | ||
464 | if (u->type < 0) | |
465 | return; | |
466 | ||
467 | if (UNIT_VTABLE(u)->done) | |
468 | UNIT_VTABLE(u)->done(u); | |
469 | ||
470 | ec = unit_get_exec_context(u); | |
471 | if (ec) | |
472 | exec_context_done(ec); | |
473 | ||
474 | cc = unit_get_cgroup_context(u); | |
475 | if (cc) | |
476 | cgroup_context_done(cc); | |
32ee7d33 DM |
477 | |
478 | r = unit_remove_from_netclass_cgroup(u); | |
479 | if (r < 0) | |
480 | log_warning_errno(r, "Unable to remove unit from netclass group: %m"); | |
598459ce LP |
481 | } |
482 | ||
87f0e418 LP |
483 | void unit_free(Unit *u) { |
484 | UnitDependency d; | |
485 | Iterator i; | |
486 | char *t; | |
487 | ||
488 | assert(u); | |
489 | ||
c2756a68 LP |
490 | if (u->manager->n_reloading <= 0) |
491 | unit_remove_transient(u); | |
492 | ||
c1e1601e LP |
493 | bus_unit_send_removed_signal(u); |
494 | ||
598459ce | 495 | unit_done(u); |
a013b84b | 496 | |
cf9fd508 DM |
497 | sd_bus_slot_unref(u->match_bus_slot); |
498 | ||
a57f7e2c LP |
499 | unit_free_requires_mounts_for(u); |
500 | ||
ac155bb8 MS |
501 | SET_FOREACH(t, u->names, i) |
502 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 503 | |
97e7d748 MS |
504 | if (u->job) { |
505 | Job *j = u->job; | |
506 | job_uninstall(j); | |
507 | job_free(j); | |
508 | } | |
964e0949 | 509 | |
e0209d83 MS |
510 | if (u->nop_job) { |
511 | Job *j = u->nop_job; | |
512 | job_uninstall(j); | |
513 | job_free(j); | |
514 | } | |
515 | ||
964e0949 | 516 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 517 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 518 | |
ac155bb8 | 519 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 520 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 521 | |
ac155bb8 | 522 | if (u->in_load_queue) |
71fda00f | 523 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 524 | |
ac155bb8 | 525 | if (u->in_dbus_queue) |
71fda00f | 526 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 527 | |
ac155bb8 | 528 | if (u->in_cleanup_queue) |
71fda00f | 529 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 530 | |
ac155bb8 | 531 | if (u->in_gc_queue) { |
71fda00f | 532 | LIST_REMOVE(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 533 | u->manager->n_in_gc_queue--; |
701cc384 LP |
534 | } |
535 | ||
4ad49000 | 536 | if (u->in_cgroup_queue) |
71fda00f | 537 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
87f0e418 | 538 | |
efdb0237 | 539 | unit_release_cgroup(u); |
72673e86 | 540 | |
5269eb6b | 541 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 542 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 543 | |
ac155bb8 | 544 | free(u->description); |
49dbfa7b | 545 | strv_free(u->documentation); |
ac155bb8 | 546 | free(u->fragment_path); |
1b64d026 | 547 | free(u->source_path); |
ae7a7182 | 548 | strv_free(u->dropin_paths); |
ac155bb8 | 549 | free(u->instance); |
87f0e418 | 550 | |
f189ab18 LP |
551 | free(u->job_timeout_reboot_arg); |
552 | ||
ac155bb8 | 553 | set_free_free(u->names); |
87f0e418 | 554 | |
a911bb9a LP |
555 | unit_unwatch_all_pids(u); |
556 | ||
ac155bb8 | 557 | condition_free_list(u->conditions); |
59fccdc5 | 558 | condition_free_list(u->asserts); |
52661efd | 559 | |
702a2d8f LP |
560 | unit_ref_unset(&u->slice); |
561 | ||
ac155bb8 MS |
562 | while (u->refs) |
563 | unit_ref_unset(u->refs); | |
57020a3a | 564 | |
87f0e418 LP |
565 | free(u); |
566 | } | |
567 | ||
568 | UnitActiveState unit_active_state(Unit *u) { | |
569 | assert(u); | |
570 | ||
ac155bb8 | 571 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
572 | return unit_active_state(unit_follow_merge(u)); |
573 | ||
574 | /* After a reload it might happen that a unit is not correctly | |
575 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 576 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
577 | |
578 | return UNIT_VTABLE(u)->active_state(u); | |
579 | } | |
580 | ||
10a94420 LP |
581 | const char* unit_sub_state_to_string(Unit *u) { |
582 | assert(u); | |
583 | ||
584 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
585 | } | |
586 | ||
7c0b05e5 MS |
587 | static int complete_move(Set **s, Set **other) { |
588 | int r; | |
589 | ||
23a177ef LP |
590 | assert(s); |
591 | assert(other); | |
87f0e418 | 592 | |
23a177ef | 593 | if (!*other) |
7c0b05e5 | 594 | return 0; |
87f0e418 | 595 | |
7c0b05e5 MS |
596 | if (*s) { |
597 | r = set_move(*s, *other); | |
598 | if (r < 0) | |
599 | return r; | |
600 | } else { | |
23a177ef LP |
601 | *s = *other; |
602 | *other = NULL; | |
603 | } | |
7c0b05e5 MS |
604 | |
605 | return 0; | |
23a177ef | 606 | } |
87f0e418 | 607 | |
7c0b05e5 | 608 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
609 | char *t; |
610 | Iterator i; | |
7c0b05e5 | 611 | int r; |
87f0e418 | 612 | |
23a177ef LP |
613 | assert(u); |
614 | assert(other); | |
615 | ||
7c0b05e5 MS |
616 | r = complete_move(&u->names, &other->names); |
617 | if (r < 0) | |
618 | return r; | |
23a177ef | 619 | |
ac155bb8 MS |
620 | set_free_free(other->names); |
621 | other->names = NULL; | |
622 | other->id = NULL; | |
23a177ef | 623 | |
ac155bb8 MS |
624 | SET_FOREACH(t, u->names, i) |
625 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
626 | |
627 | return 0; | |
87f0e418 LP |
628 | } |
629 | ||
09a65f92 MS |
630 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
631 | unsigned n_reserve; | |
632 | ||
633 | assert(u); | |
634 | assert(other); | |
635 | assert(d < _UNIT_DEPENDENCY_MAX); | |
636 | ||
637 | /* | |
638 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 639 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
640 | * as a whole to u by complete_move(). |
641 | */ | |
642 | if (!u->dependencies[d]) | |
643 | return 0; | |
644 | ||
645 | /* merge_dependencies() will skip a u-on-u dependency */ | |
646 | n_reserve = set_size(other->dependencies[d]) - !!set_get(other->dependencies[d], u); | |
647 | ||
648 | return set_reserve(u->dependencies[d], n_reserve); | |
649 | } | |
650 | ||
d1fab3fe | 651 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
652 | Iterator i; |
653 | Unit *back; | |
87f0e418 | 654 | int r; |
23a177ef LP |
655 | |
656 | assert(u); | |
657 | assert(other); | |
658 | assert(d < _UNIT_DEPENDENCY_MAX); | |
659 | ||
83a95334 | 660 | /* Fix backwards pointers */ |
ac155bb8 | 661 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
662 | UnitDependency k; |
663 | ||
e48614c4 | 664 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff ZJS |
665 | /* Do not add dependencies between u and itself */ |
666 | if (back == u) { | |
d1fab3fe | 667 | if (set_remove(back->dependencies[k], other)) |
f2341e0a | 668 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff ZJS |
669 | } else { |
670 | r = set_remove_and_put(back->dependencies[k], other, u); | |
671 | if (r == -EEXIST) | |
672 | set_remove(back->dependencies[k], other); | |
673 | else | |
674 | assert(r >= 0 || r == -ENOENT); | |
675 | } | |
e48614c4 | 676 | } |
23a177ef LP |
677 | } |
678 | ||
e66047ff | 679 | /* Also do not move dependencies on u to itself */ |
d1fab3fe ZJS |
680 | back = set_remove(other->dependencies[d], u); |
681 | if (back) | |
f2341e0a | 682 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 683 | |
7c0b05e5 MS |
684 | /* The move cannot fail. The caller must have performed a reservation. */ |
685 | assert_se(complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); | |
23a177ef | 686 | |
525d3cc7 | 687 | other->dependencies[d] = set_free(other->dependencies[d]); |
23a177ef LP |
688 | } |
689 | ||
690 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 691 | UnitDependency d; |
d1fab3fe | 692 | const char *other_id = NULL; |
09a65f92 | 693 | int r; |
87f0e418 LP |
694 | |
695 | assert(u); | |
696 | assert(other); | |
ac155bb8 MS |
697 | assert(u->manager == other->manager); |
698 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 699 | |
cc916967 LP |
700 | other = unit_follow_merge(other); |
701 | ||
23a177ef LP |
702 | if (other == u) |
703 | return 0; | |
704 | ||
ac155bb8 | 705 | if (u->type != other->type) |
9e2f7c11 LP |
706 | return -EINVAL; |
707 | ||
ac155bb8 | 708 | if (!u->instance != !other->instance) |
87f0e418 LP |
709 | return -EINVAL; |
710 | ||
ac155bb8 | 711 | if (other->load_state != UNIT_STUB && |
c2756a68 | 712 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 713 | return -EEXIST; |
87f0e418 | 714 | |
ac155bb8 | 715 | if (other->job) |
819e213f LP |
716 | return -EEXIST; |
717 | ||
e0209d83 MS |
718 | if (other->nop_job) |
719 | return -EEXIST; | |
720 | ||
fdf20a31 | 721 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
722 | return -EEXIST; |
723 | ||
d1fab3fe ZJS |
724 | if (other->id) |
725 | other_id = strdupa(other->id); | |
726 | ||
09a65f92 MS |
727 | /* Make reservations to ensure merge_dependencies() won't fail */ |
728 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
729 | r = reserve_dependencies(u, other, d); | |
730 | /* | |
731 | * We don't rollback reservations if we fail. We don't have | |
732 | * a way to undo reservations. A reservation is not a leak. | |
733 | */ | |
734 | if (r < 0) | |
735 | return r; | |
736 | } | |
737 | ||
87f0e418 | 738 | /* Merge names */ |
7c0b05e5 MS |
739 | r = merge_names(u, other); |
740 | if (r < 0) | |
741 | return r; | |
87f0e418 | 742 | |
57020a3a | 743 | /* Redirect all references */ |
ac155bb8 MS |
744 | while (other->refs) |
745 | unit_ref_set(other->refs, u); | |
57020a3a | 746 | |
87f0e418 LP |
747 | /* Merge dependencies */ |
748 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 749 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 750 | |
ac155bb8 MS |
751 | other->load_state = UNIT_MERGED; |
752 | other->merged_into = u; | |
23a177ef | 753 | |
3616a49c LP |
754 | /* If there is still some data attached to the other node, we |
755 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 756 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
757 | if (UNIT_VTABLE(other)->done) |
758 | UNIT_VTABLE(other)->done(other); | |
759 | ||
760 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
761 | unit_add_to_cleanup_queue(other); |
762 | ||
763 | return 0; | |
764 | } | |
765 | ||
766 | int unit_merge_by_name(Unit *u, const char *name) { | |
767 | Unit *other; | |
9e2f7c11 | 768 | int r; |
68eda4bd | 769 | _cleanup_free_ char *s = NULL; |
23a177ef LP |
770 | |
771 | assert(u); | |
772 | assert(name); | |
773 | ||
7410616c | 774 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 775 | if (!u->instance) |
9e2f7c11 LP |
776 | return -EINVAL; |
777 | ||
7410616c LP |
778 | r = unit_name_replace_instance(name, u->instance, &s); |
779 | if (r < 0) | |
780 | return r; | |
9e2f7c11 LP |
781 | |
782 | name = s; | |
783 | } | |
784 | ||
c2756a68 | 785 | other = manager_get_unit(u->manager, name); |
7410616c LP |
786 | if (other) |
787 | return unit_merge(u, other); | |
23a177ef | 788 | |
7410616c | 789 | return unit_add_name(u, name); |
23a177ef LP |
790 | } |
791 | ||
792 | Unit* unit_follow_merge(Unit *u) { | |
793 | assert(u); | |
794 | ||
ac155bb8 MS |
795 | while (u->load_state == UNIT_MERGED) |
796 | assert_se(u = u->merged_into); | |
23a177ef LP |
797 | |
798 | return u; | |
799 | } | |
800 | ||
801 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
802 | int r; | |
803 | ||
804 | assert(u); | |
805 | assert(c); | |
806 | ||
36be24c8 ZJS |
807 | if (c->working_directory) { |
808 | r = unit_require_mounts_for(u, c->working_directory); | |
809 | if (r < 0) | |
810 | return r; | |
811 | } | |
812 | ||
813 | if (c->root_directory) { | |
814 | r = unit_require_mounts_for(u, c->root_directory); | |
815 | if (r < 0) | |
816 | return r; | |
817 | } | |
818 | ||
b2c23da8 | 819 | if (u->manager->running_as != MANAGER_SYSTEM) |
b46a529c LP |
820 | return 0; |
821 | ||
822 | if (c->private_tmp) { | |
823 | r = unit_require_mounts_for(u, "/tmp"); | |
824 | if (r < 0) | |
825 | return r; | |
826 | ||
827 | r = unit_require_mounts_for(u, "/var/tmp"); | |
828 | if (r < 0) | |
829 | return r; | |
830 | } | |
831 | ||
ecc6e2b8 LP |
832 | if (c->std_output != EXEC_OUTPUT_KMSG && |
833 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 834 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
835 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
836 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 837 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 838 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 839 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 840 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 841 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 842 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 843 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
844 | return 0; |
845 | ||
846 | /* If syslog or kernel logging is requested, make sure our own | |
847 | * logging daemon is run first. */ | |
848 | ||
b46a529c LP |
849 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); |
850 | if (r < 0) | |
851 | return r; | |
23a177ef | 852 | |
87f0e418 LP |
853 | return 0; |
854 | } | |
855 | ||
87f0e418 LP |
856 | const char *unit_description(Unit *u) { |
857 | assert(u); | |
858 | ||
ac155bb8 MS |
859 | if (u->description) |
860 | return u->description; | |
87f0e418 | 861 | |
ac155bb8 | 862 | return strna(u->id); |
87f0e418 LP |
863 | } |
864 | ||
865 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 866 | char *t, **j; |
87f0e418 LP |
867 | UnitDependency d; |
868 | Iterator i; | |
47be870b | 869 | const char *prefix2; |
173e3821 LP |
870 | char |
871 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
872 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
873 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
874 | timestamp4[FORMAT_TIMESTAMP_MAX], |
875 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 876 | Unit *following; |
eeaedb7c LP |
877 | _cleanup_set_free_ Set *following_set = NULL; |
878 | int r; | |
87f0e418 LP |
879 | |
880 | assert(u); | |
ac155bb8 | 881 | assert(u->type >= 0); |
87f0e418 | 882 | |
4c940960 | 883 | prefix = strempty(prefix); |
63c372cb | 884 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
885 | |
886 | fprintf(f, | |
40d50879 | 887 | "%s-> Unit %s:\n" |
87f0e418 | 888 | "%s\tDescription: %s\n" |
9e2f7c11 | 889 | "%s\tInstance: %s\n" |
87f0e418 | 890 | "%s\tUnit Load State: %s\n" |
2fad8195 | 891 | "%s\tUnit Active State: %s\n" |
173e3821 | 892 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 893 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 894 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 895 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 896 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 897 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 898 | "%s\tTransient: %s\n" |
4ad49000 LP |
899 | "%s\tSlice: %s\n" |
900 | "%s\tCGroup: %s\n" | |
901 | "%s\tCGroup realized: %s\n" | |
6414b7c9 DS |
902 | "%s\tCGroup mask: 0x%x\n" |
903 | "%s\tCGroup members mask: 0x%x\n", | |
ac155bb8 | 904 | prefix, u->id, |
87f0e418 | 905 | prefix, unit_description(u), |
ac155bb8 MS |
906 | prefix, strna(u->instance), |
907 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 908 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
909 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
910 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
911 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
912 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 913 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 914 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 915 | prefix, yes_no(u->transient), |
4ad49000 LP |
916 | prefix, strna(unit_slice_name(u)), |
917 | prefix, strna(u->cgroup_path), | |
918 | prefix, yes_no(u->cgroup_realized), | |
bc432dc7 | 919 | prefix, u->cgroup_realized_mask, |
6414b7c9 | 920 | prefix, u->cgroup_members_mask); |
0301abf4 | 921 | |
ac155bb8 | 922 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
923 | fprintf(f, "%s\tName: %s\n", prefix, t); |
924 | ||
49dbfa7b LP |
925 | STRV_FOREACH(j, u->documentation) |
926 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
927 | ||
eeaedb7c LP |
928 | following = unit_following(u); |
929 | if (following) | |
ac155bb8 | 930 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 931 | |
eeaedb7c LP |
932 | r = unit_following_set(u, &following_set); |
933 | if (r >= 0) { | |
934 | Unit *other; | |
935 | ||
936 | SET_FOREACH(other, following_set, i) | |
937 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
938 | } | |
939 | ||
ac155bb8 MS |
940 | if (u->fragment_path) |
941 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 942 | |
1b64d026 LP |
943 | if (u->source_path) |
944 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
945 | ||
ae7a7182 | 946 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 947 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 948 | |
ac155bb8 | 949 | if (u->job_timeout > 0) |
2fa4092c | 950 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 951 | |
f189ab18 LP |
952 | if (u->job_timeout_action != FAILURE_ACTION_NONE) |
953 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, failure_action_to_string(u->job_timeout_action)); | |
954 | ||
955 | if (u->job_timeout_reboot_arg) | |
956 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
957 | ||
59fccdc5 LP |
958 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
959 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 960 | |
ac155bb8 | 961 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
962 | fprintf(f, |
963 | "%s\tCondition Timestamp: %s\n" | |
964 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
965 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
966 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 967 | |
59fccdc5 LP |
968 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
969 | fprintf(f, | |
970 | "%s\tAssert Timestamp: %s\n" | |
971 | "%s\tAssert Result: %s\n", | |
972 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
973 | prefix, yes_no(u->assert_result)); | |
974 | ||
87f0e418 LP |
975 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
976 | Unit *other; | |
977 | ||
ac155bb8 MS |
978 | SET_FOREACH(other, u->dependencies[d], i) |
979 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
980 | } |
981 | ||
7c8fa05c | 982 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
983 | fprintf(f, |
984 | "%s\tRequiresMountsFor:", prefix); | |
985 | ||
986 | STRV_FOREACH(j, u->requires_mounts_for) | |
987 | fprintf(f, " %s", *j); | |
988 | ||
989 | fputs("\n", f); | |
990 | } | |
991 | ||
ac155bb8 | 992 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 993 | |
b0650475 | 994 | fprintf(f, |
a40eb732 | 995 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
996 | "%s\tRefuseManualStart: %s\n" |
997 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 998 | "%s\tDefaultDependencies: %s\n" |
d420282b | 999 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1000 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1001 | prefix, yes_no(u->stop_when_unneeded), |
1002 | prefix, yes_no(u->refuse_manual_start), | |
1003 | prefix, yes_no(u->refuse_manual_stop), | |
1004 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1005 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1006 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 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, | |
be7d9ff7 | 1104 | UNIT_REQUISITE_OF, |
21256a2b LP |
1105 | UNIT_WANTED_BY, |
1106 | UNIT_BOUND_BY | |
1107 | }; | |
1108 | ||
bba34eed | 1109 | Unit *target; |
98bc2000 | 1110 | Iterator i; |
21256a2b | 1111 | unsigned k; |
db57f3c6 | 1112 | int r = 0; |
98bc2000 LP |
1113 | |
1114 | assert(u); | |
1115 | ||
21256a2b | 1116 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
1117 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
1118 | r = unit_add_default_target_dependency(u, target); | |
1119 | if (r < 0) | |
21256a2b | 1120 | return r; |
a016b922 LP |
1121 | } |
1122 | ||
e954c9cf LP |
1123 | return r; |
1124 | } | |
4ad49000 | 1125 | |
e954c9cf LP |
1126 | static int unit_add_slice_dependencies(Unit *u) { |
1127 | assert(u); | |
b81884e7 | 1128 | |
35b7ff80 | 1129 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1130 | return 0; |
1131 | ||
1132 | if (UNIT_ISSET(u->slice)) | |
8c8da0e0 | 1133 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true); |
e954c9cf | 1134 | |
8c8da0e0 | 1135 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1136 | return 0; |
1137 | ||
8c8da0e0 | 1138 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, NULL, true); |
98bc2000 LP |
1139 | } |
1140 | ||
e954c9cf | 1141 | static int unit_add_mount_dependencies(Unit *u) { |
9588bc32 LP |
1142 | char **i; |
1143 | int r; | |
1144 | ||
1145 | assert(u); | |
1146 | ||
1147 | STRV_FOREACH(i, u->requires_mounts_for) { | |
1148 | char prefix[strlen(*i) + 1]; | |
1149 | ||
1150 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
c7c89abb | 1151 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1152 | Unit *m; |
1153 | ||
c7c89abb | 1154 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1155 | if (r < 0) |
1156 | return r; | |
c7c89abb FB |
1157 | |
1158 | m = manager_get_unit(u->manager, p); | |
1159 | if (!m) { | |
1160 | /* Make sure to load the mount unit if | |
1161 | * it exists. If so the dependencies | |
1162 | * on this unit will be added later | |
1163 | * during the loading of the mount | |
1164 | * unit. */ | |
1165 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1166 | continue; |
c7c89abb | 1167 | } |
9588bc32 LP |
1168 | if (m == u) |
1169 | continue; | |
1170 | ||
1171 | if (m->load_state != UNIT_LOADED) | |
1172 | continue; | |
1173 | ||
1174 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1175 | if (r < 0) | |
1176 | return r; | |
1177 | ||
1178 | if (m->fragment_path) { | |
1179 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1180 | if (r < 0) | |
1181 | return r; | |
1182 | } | |
1183 | } | |
1184 | } | |
1185 | ||
1186 | return 0; | |
1187 | } | |
1188 | ||
95ae05c0 WC |
1189 | static int unit_add_startup_units(Unit *u) { |
1190 | CGroupContext *c; | |
5269eb6b | 1191 | int r; |
95ae05c0 WC |
1192 | |
1193 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1194 | if (!c) |
1195 | return 0; | |
1196 | ||
d53d9474 LP |
1197 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
1198 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) | |
db785129 LP |
1199 | return 0; |
1200 | ||
5269eb6b LP |
1201 | r = set_ensure_allocated(&u->manager->startup_units, NULL); |
1202 | if (r < 0) | |
1203 | return r; | |
1204 | ||
756c09e6 | 1205 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1206 | } |
1207 | ||
87f0e418 LP |
1208 | int unit_load(Unit *u) { |
1209 | int r; | |
1210 | ||
1211 | assert(u); | |
1212 | ||
ac155bb8 | 1213 | if (u->in_load_queue) { |
71fda00f | 1214 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1215 | u->in_load_queue = false; |
87f0e418 LP |
1216 | } |
1217 | ||
ac155bb8 | 1218 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1219 | return -EINVAL; |
1220 | ||
ac155bb8 | 1221 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1222 | return 0; |
1223 | ||
c2756a68 LP |
1224 | if (UNIT_VTABLE(u)->load) { |
1225 | r = UNIT_VTABLE(u)->load(u); | |
1226 | if (r < 0) | |
87f0e418 | 1227 | goto fail; |
c2756a68 | 1228 | } |
23a177ef | 1229 | |
ac155bb8 | 1230 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1231 | r = -ENOENT; |
1232 | goto fail; | |
1233 | } | |
1234 | ||
7c8fa05c | 1235 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1236 | |
e954c9cf LP |
1237 | r = unit_add_target_dependencies(u); |
1238 | if (r < 0) | |
1239 | goto fail; | |
1240 | ||
1241 | r = unit_add_slice_dependencies(u); | |
1242 | if (r < 0) | |
1243 | goto fail; | |
c2756a68 | 1244 | |
e954c9cf | 1245 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1246 | if (r < 0) |
c2756a68 | 1247 | goto fail; |
7c8fa05c | 1248 | |
95ae05c0 WC |
1249 | r = unit_add_startup_units(u); |
1250 | if (r < 0) | |
1251 | goto fail; | |
1252 | ||
bc432dc7 | 1253 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1254 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
c2756a68 LP |
1255 | r = -EINVAL; |
1256 | goto fail; | |
1257 | } | |
bc432dc7 LP |
1258 | |
1259 | unit_update_cgroup_members_masks(u); | |
32ee7d33 DM |
1260 | |
1261 | /* If we are reloading, we need to wait for the deserializer | |
1262 | * to restore the net_cls ids that have been set previously */ | |
1263 | if (u->manager->n_reloading <= 0) { | |
1264 | r = unit_add_to_netclass_cgroup(u); | |
1265 | if (r < 0) | |
1266 | return r; | |
1267 | } | |
f68319bb LP |
1268 | } |
1269 | ||
ac155bb8 | 1270 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1271 | |
1272 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1273 | unit_add_to_gc_queue(u); |
87f0e418 | 1274 | |
87f0e418 LP |
1275 | return 0; |
1276 | ||
1277 | fail: | |
c2756a68 | 1278 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1279 | u->load_error = r; |
c1e1601e | 1280 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1281 | unit_add_to_gc_queue(u); |
23a177ef | 1282 | |
f2341e0a | 1283 | log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
23a177ef | 1284 | |
87f0e418 LP |
1285 | return r; |
1286 | } | |
1287 | ||
49365733 LP |
1288 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1289 | Condition *c; | |
1290 | int triggered = -1; | |
1291 | ||
1292 | assert(u); | |
1293 | assert(to_string); | |
1294 | ||
1295 | /* If the condition list is empty, then it is true */ | |
1296 | if (!first) | |
1297 | return true; | |
1298 | ||
1299 | /* Otherwise, if all of the non-trigger conditions apply and | |
1300 | * if any of the trigger conditions apply (unless there are | |
1301 | * none) we return true */ | |
1302 | LIST_FOREACH(conditions, c, first) { | |
1303 | int r; | |
1304 | ||
1305 | r = condition_test(c); | |
1306 | if (r < 0) | |
f2341e0a LP |
1307 | log_unit_warning(u, |
1308 | "Couldn't determine result for %s=%s%s%s, assuming failed: %m", | |
49365733 LP |
1309 | to_string(c->type), |
1310 | c->trigger ? "|" : "", | |
1311 | c->negate ? "!" : "", | |
f2341e0a | 1312 | c->parameter); |
49365733 | 1313 | else |
f2341e0a LP |
1314 | log_unit_debug(u, |
1315 | "%s=%s%s%s %s.", | |
49365733 LP |
1316 | to_string(c->type), |
1317 | c->trigger ? "|" : "", | |
1318 | c->negate ? "!" : "", | |
1319 | c->parameter, | |
f2341e0a | 1320 | condition_result_to_string(c->result)); |
49365733 LP |
1321 | |
1322 | if (!c->trigger && r <= 0) | |
1323 | return false; | |
1324 | ||
1325 | if (c->trigger && triggered <= 0) | |
1326 | triggered = r > 0; | |
1327 | } | |
1328 | ||
1329 | return triggered != 0; | |
1330 | } | |
1331 | ||
9588bc32 | 1332 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1333 | assert(u); |
1334 | ||
ac155bb8 | 1335 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1336 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1337 | |
ac155bb8 | 1338 | return u->condition_result; |
90bbc946 LP |
1339 | } |
1340 | ||
59fccdc5 LP |
1341 | static bool unit_assert_test(Unit *u) { |
1342 | assert(u); | |
1343 | ||
1344 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1345 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1346 | |
1347 | return u->assert_result; | |
1348 | } | |
1349 | ||
df446f96 LP |
1350 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
1351 | DISABLE_WARNING_FORMAT_NONLITERAL; | |
1352 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, status, unit_status_msg_format, unit_description(u)); | |
1353 | REENABLE_WARNING; | |
1354 | } | |
1355 | ||
44a6b1b6 | 1356 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
877d54e9 | 1357 | const char *format; |
a85ca902 | 1358 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1359 | |
1360 | assert(u); | |
df446f96 | 1361 | assert(IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)); |
877d54e9 | 1362 | |
b5bf308b | 1363 | if (t != JOB_RELOAD) { |
a85ca902 MS |
1364 | format_table = &UNIT_VTABLE(u)->status_message_formats; |
1365 | if (format_table) { | |
1366 | format = format_table->starting_stopping[t == JOB_STOP]; | |
1367 | if (format) | |
1368 | return format; | |
1369 | } | |
1370 | } | |
877d54e9 LP |
1371 | |
1372 | /* Return generic strings */ | |
1373 | if (t == JOB_START) | |
1374 | return "Starting %s."; | |
1375 | else if (t == JOB_STOP) | |
1376 | return "Stopping %s."; | |
b5bf308b | 1377 | else |
877d54e9 | 1378 | return "Reloading %s."; |
877d54e9 LP |
1379 | } |
1380 | ||
1381 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1382 | const char *format; | |
1383 | ||
1384 | assert(u); | |
1385 | ||
df446f96 LP |
1386 | /* Reload status messages have traditionally not been printed to console. */ |
1387 | if (!IN_SET(t, JOB_START, JOB_STOP)) | |
1388 | return; | |
1389 | ||
877d54e9 | 1390 | format = unit_get_status_message_format(u, t); |
c6918296 | 1391 | |
bcfce235 | 1392 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1393 | unit_status_printf(u, "", format); |
bcfce235 | 1394 | REENABLE_WARNING; |
c6918296 MS |
1395 | } |
1396 | ||
877d54e9 LP |
1397 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
1398 | const char *format; | |
1399 | char buf[LINE_MAX]; | |
1400 | sd_id128_t mid; | |
1401 | ||
1402 | assert(u); | |
1403 | ||
df446f96 | 1404 | if (!IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)) |
877d54e9 LP |
1405 | return; |
1406 | ||
81270860 LP |
1407 | if (log_on_console()) |
1408 | return; | |
1409 | ||
877d54e9 LP |
1410 | /* We log status messages for all units and all operations. */ |
1411 | ||
a85ca902 | 1412 | format = unit_get_status_message_format(u, t); |
877d54e9 | 1413 | |
bcfce235 | 1414 | DISABLE_WARNING_FORMAT_NONLITERAL; |
877d54e9 | 1415 | snprintf(buf, sizeof(buf), format, unit_description(u)); |
bcfce235 | 1416 | REENABLE_WARNING; |
877d54e9 LP |
1417 | |
1418 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1419 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1420 | SD_MESSAGE_UNIT_RELOADING; | |
1421 | ||
f2341e0a LP |
1422 | /* Note that we deliberately use LOG_MESSAGE() instead of |
1423 | * LOG_UNIT_MESSAGE() here, since this is supposed to mimic | |
1424 | * closely what is written to screen using the status output, | |
1425 | * which is supposed the highest level, friendliest output | |
1426 | * possible, which means we should avoid the low-level unit | |
1427 | * name. */ | |
1428 | log_struct(LOG_INFO, | |
1429 | LOG_MESSAGE_ID(mid), | |
1430 | LOG_UNIT_ID(u), | |
1431 | LOG_MESSAGE("%s", buf), | |
1432 | NULL); | |
877d54e9 | 1433 | } |
877d54e9 | 1434 | |
d1a34ae9 | 1435 | void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t) { |
df446f96 LP |
1436 | assert(u); |
1437 | assert(t >= 0); | |
1438 | assert(t < _JOB_TYPE_MAX); | |
d1a34ae9 MS |
1439 | |
1440 | unit_status_log_starting_stopping_reloading(u, t); | |
df446f96 | 1441 | unit_status_print_starting_stopping(u, t); |
d1a34ae9 MS |
1442 | } |
1443 | ||
87f0e418 | 1444 | /* Errors: |
d5159713 LP |
1445 | * -EBADR: This unit type does not support starting. |
1446 | * -EALREADY: Unit is already started. | |
1447 | * -EAGAIN: An operation is already in progress. Retry later. | |
1448 | * -ECANCELED: Too many requests for now. | |
59fccdc5 | 1449 | * -EPROTO: Assert failed |
87f0e418 LP |
1450 | */ |
1451 | int unit_start(Unit *u) { | |
1452 | UnitActiveState state; | |
92ab323c | 1453 | Unit *following; |
87f0e418 LP |
1454 | |
1455 | assert(u); | |
1456 | ||
8ff4d2ab | 1457 | /* Units that aren't loaded cannot be started */ |
ac155bb8 | 1458 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1459 | return -EINVAL; |
1460 | ||
a82e5507 LP |
1461 | /* If this is already started, then this will succeed. Note |
1462 | * that this will even succeed if this unit is not startable | |
1463 | * by the user. This is relied on to detect when we need to | |
1464 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1465 | state = unit_active_state(u); |
1466 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1467 | return -EALREADY; | |
1468 | ||
a82e5507 LP |
1469 | /* If the conditions failed, don't do anything at all. If we |
1470 | * already are activating this call might still be useful to | |
1471 | * speed up activation in case there is some hold-off time, | |
1472 | * but we don't want to recheck the condition in that case. */ | |
1473 | if (state != UNIT_ACTIVATING && | |
1474 | !unit_condition_test(u)) { | |
f2341e0a | 1475 | log_unit_debug(u, "Starting requested but condition failed. Not starting unit."); |
52661efd LP |
1476 | return -EALREADY; |
1477 | } | |
1478 | ||
59fccdc5 LP |
1479 | /* If the asserts failed, fail the entire job */ |
1480 | if (state != UNIT_ACTIVATING && | |
1481 | !unit_assert_test(u)) { | |
f2341e0a | 1482 | log_unit_notice(u, "Starting requested but asserts failed."); |
59fccdc5 LP |
1483 | return -EPROTO; |
1484 | } | |
1485 | ||
d11a7645 LP |
1486 | /* Units of types that aren't supported cannot be |
1487 | * started. Note that we do this test only after the condition | |
1488 | * checks, so that we rather return condition check errors | |
1489 | * (which are usually not considered a true failure) than "not | |
1490 | * supported" errors (which are considered a failure). | |
1491 | */ | |
1492 | if (!unit_supported(u)) | |
1493 | return -EOPNOTSUPP; | |
1494 | ||
92ab323c | 1495 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1496 | following = unit_following(u); |
1497 | if (following) { | |
f2341e0a | 1498 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1499 | return unit_start(following); |
1500 | } | |
1501 | ||
1502 | /* If it is stopped, but we cannot start it, then fail */ | |
1503 | if (!UNIT_VTABLE(u)->start) | |
1504 | return -EBADR; | |
1505 | ||
87f0e418 LP |
1506 | /* We don't suppress calls to ->start() here when we are |
1507 | * already starting, to allow this request to be used as a | |
1508 | * "hurry up" call, for example when the unit is in some "auto | |
1509 | * restart" state where it waits for a holdoff timer to elapse | |
1510 | * before it will start again. */ | |
1511 | ||
c1e1601e | 1512 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1513 | |
d1a34ae9 | 1514 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1515 | } |
1516 | ||
1517 | bool unit_can_start(Unit *u) { | |
1518 | assert(u); | |
1519 | ||
8ff4d2ab LP |
1520 | if (u->load_state != UNIT_LOADED) |
1521 | return false; | |
1522 | ||
1523 | if (!unit_supported(u)) | |
1524 | return false; | |
1525 | ||
87f0e418 LP |
1526 | return !!UNIT_VTABLE(u)->start; |
1527 | } | |
1528 | ||
2528a7a6 LP |
1529 | bool unit_can_isolate(Unit *u) { |
1530 | assert(u); | |
1531 | ||
1532 | return unit_can_start(u) && | |
ac155bb8 | 1533 | u->allow_isolate; |
2528a7a6 LP |
1534 | } |
1535 | ||
87f0e418 LP |
1536 | /* Errors: |
1537 | * -EBADR: This unit type does not support stopping. | |
1538 | * -EALREADY: Unit is already stopped. | |
1539 | * -EAGAIN: An operation is already in progress. Retry later. | |
1540 | */ | |
1541 | int unit_stop(Unit *u) { | |
1542 | UnitActiveState state; | |
92ab323c | 1543 | Unit *following; |
87f0e418 LP |
1544 | |
1545 | assert(u); | |
1546 | ||
87f0e418 | 1547 | state = unit_active_state(u); |
fdf20a31 | 1548 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1549 | return -EALREADY; |
1550 | ||
0faacd47 LP |
1551 | following = unit_following(u); |
1552 | if (following) { | |
f2341e0a | 1553 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1554 | return unit_stop(following); |
1555 | } | |
1556 | ||
7898b0cf LP |
1557 | if (!UNIT_VTABLE(u)->stop) |
1558 | return -EBADR; | |
1559 | ||
c1e1601e | 1560 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1561 | |
d1a34ae9 | 1562 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1563 | } |
1564 | ||
1565 | /* Errors: | |
1566 | * -EBADR: This unit type does not support reloading. | |
1567 | * -ENOEXEC: Unit is not started. | |
1568 | * -EAGAIN: An operation is already in progress. Retry later. | |
1569 | */ | |
1570 | int unit_reload(Unit *u) { | |
1571 | UnitActiveState state; | |
92ab323c | 1572 | Unit *following; |
87f0e418 LP |
1573 | |
1574 | assert(u); | |
1575 | ||
ac155bb8 | 1576 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1577 | return -EINVAL; |
1578 | ||
87f0e418 LP |
1579 | if (!unit_can_reload(u)) |
1580 | return -EBADR; | |
1581 | ||
1582 | state = unit_active_state(u); | |
e364ad06 | 1583 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1584 | return -EALREADY; |
1585 | ||
6a371e23 | 1586 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1587 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1588 | return -ENOEXEC; |
6a371e23 | 1589 | } |
87f0e418 | 1590 | |
e48614c4 ZJS |
1591 | following = unit_following(u); |
1592 | if (following) { | |
f2341e0a | 1593 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1594 | return unit_reload(following); |
1595 | } | |
1596 | ||
c1e1601e | 1597 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1598 | |
d1a34ae9 | 1599 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1600 | } |
1601 | ||
1602 | bool unit_can_reload(Unit *u) { | |
1603 | assert(u); | |
1604 | ||
1605 | if (!UNIT_VTABLE(u)->reload) | |
1606 | return false; | |
1607 | ||
1608 | if (!UNIT_VTABLE(u)->can_reload) | |
1609 | return true; | |
1610 | ||
1611 | return UNIT_VTABLE(u)->can_reload(u); | |
1612 | } | |
1613 | ||
b4a16b7b | 1614 | static void unit_check_unneeded(Unit *u) { |
be7d9ff7 | 1615 | |
4bd29fe5 LP |
1616 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
1617 | ||
be7d9ff7 LP |
1618 | static const UnitDependency needed_dependencies[] = { |
1619 | UNIT_REQUIRED_BY, | |
084918ba | 1620 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1621 | UNIT_WANTED_BY, |
1622 | UNIT_BOUND_BY, | |
1623 | }; | |
1624 | ||
f3bff0eb | 1625 | Unit *other; |
be7d9ff7 LP |
1626 | Iterator i; |
1627 | unsigned j; | |
1628 | int r; | |
f3bff0eb LP |
1629 | |
1630 | assert(u); | |
1631 | ||
1632 | /* If this service shall be shut down when unneeded then do | |
1633 | * so. */ | |
1634 | ||
ac155bb8 | 1635 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1636 | return; |
1637 | ||
1638 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1639 | return; | |
1640 | ||
be7d9ff7 | 1641 | for (j = 0; j < ELEMENTSOF(needed_dependencies); j++) |
f3b85044 | 1642 | SET_FOREACH(other, u->dependencies[needed_dependencies[j]], i) |
be7d9ff7 LP |
1643 | if (unit_active_or_pending(other)) |
1644 | return; | |
b81884e7 | 1645 | |
bea355da LP |
1646 | /* If stopping a unit fails continously we might enter a stop |
1647 | * loop here, hence stop acting on the service being | |
1648 | * unnecessary after a while. */ | |
67bfdc97 | 1649 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { |
bea355da LP |
1650 | log_unit_warning(u, "Unit not needed anymore, but not stopping since we tried this too often recently."); |
1651 | return; | |
1652 | } | |
1653 | ||
f2341e0a | 1654 | log_unit_info(u, "Unit not needed anymore. Stopping."); |
f3bff0eb LP |
1655 | |
1656 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
4bd29fe5 | 1657 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
be7d9ff7 | 1658 | if (r < 0) |
4bd29fe5 | 1659 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
f3bff0eb LP |
1660 | } |
1661 | ||
ff502445 | 1662 | static void unit_check_binds_to(Unit *u) { |
4bd29fe5 | 1663 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
ff502445 LP |
1664 | bool stop = false; |
1665 | Unit *other; | |
1666 | Iterator i; | |
67bfdc97 | 1667 | int r; |
ff502445 LP |
1668 | |
1669 | assert(u); | |
1670 | ||
1671 | if (u->job) | |
1672 | return; | |
1673 | ||
1674 | if (unit_active_state(u) != UNIT_ACTIVE) | |
1675 | return; | |
1676 | ||
1677 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) { | |
1678 | if (other->job) | |
1679 | continue; | |
1680 | ||
1681 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1682 | continue; | |
1683 | ||
1684 | stop = true; | |
98f738b6 | 1685 | break; |
ff502445 LP |
1686 | } |
1687 | ||
1688 | if (!stop) | |
1689 | return; | |
1690 | ||
67bfdc97 LP |
1691 | /* If stopping a unit fails continously we might enter a stop |
1692 | * loop here, hence stop acting on the service being | |
1693 | * unnecessary after a while. */ | |
1694 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { | |
1695 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); | |
1696 | return; | |
1697 | } | |
1698 | ||
98f738b6 | 1699 | assert(other); |
f2341e0a | 1700 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
1701 | |
1702 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
4bd29fe5 | 1703 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
67bfdc97 | 1704 | if (r < 0) |
4bd29fe5 | 1705 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
ff502445 LP |
1706 | } |
1707 | ||
87f0e418 LP |
1708 | static void retroactively_start_dependencies(Unit *u) { |
1709 | Iterator i; | |
1710 | Unit *other; | |
1711 | ||
1712 | assert(u); | |
1713 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1714 | ||
ac155bb8 MS |
1715 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1716 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1717 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1718 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
b81884e7 | 1719 | |
7f2cddae | 1720 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1721 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1722 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1723 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
87f0e418 | 1724 | |
ac155bb8 MS |
1725 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1726 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1727 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1728 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL); |
87f0e418 | 1729 | |
ac155bb8 | 1730 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1731 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1732 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
69dd2852 | 1733 | |
ac155bb8 | 1734 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1735 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1736 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
87f0e418 LP |
1737 | } |
1738 | ||
1739 | static void retroactively_stop_dependencies(Unit *u) { | |
1740 | Iterator i; | |
1741 | Unit *other; | |
1742 | ||
1743 | assert(u); | |
1744 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1745 | ||
b81884e7 | 1746 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1747 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1748 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1749 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
cd0504d0 MS |
1750 | } |
1751 | ||
1752 | static void check_unneeded_dependencies(Unit *u) { | |
1753 | Iterator i; | |
1754 | Unit *other; | |
1755 | ||
1756 | assert(u); | |
1757 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1758 | |
1759 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1760 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1761 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1762 | unit_check_unneeded(other); |
ac155bb8 | 1763 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1764 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1765 | unit_check_unneeded(other); |
ac155bb8 | 1766 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1767 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1768 | unit_check_unneeded(other); |
7f2cddae | 1769 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1770 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1771 | unit_check_unneeded(other); | |
87f0e418 LP |
1772 | } |
1773 | ||
3ecaa09b | 1774 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1775 | Unit *other; |
1776 | Iterator i; | |
1777 | ||
1778 | assert(u); | |
1779 | ||
ac155bb8 | 1780 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1781 | return; |
1782 | ||
f2341e0a | 1783 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 1784 | |
ac155bb8 | 1785 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1786 | int r; |
1787 | ||
4bd29fe5 | 1788 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, NULL, NULL); |
c1b6628d | 1789 | if (r < 0) |
f2341e0a | 1790 | log_unit_error_errno(u, r, "Failed to enqueue OnFailure= job: %m"); |
222ae6a8 | 1791 | } |
c0daa706 LP |
1792 | } |
1793 | ||
3ecaa09b LP |
1794 | void unit_trigger_notify(Unit *u) { |
1795 | Unit *other; | |
1796 | Iterator i; | |
1797 | ||
1798 | assert(u); | |
1799 | ||
1800 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1801 | if (UNIT_VTABLE(other)->trigger_notify) | |
1802 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1803 | } | |
1804 | ||
e2f3b44c | 1805 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 1806 | Manager *m; |
7e6e7b06 | 1807 | bool unexpected; |
a096ed36 | 1808 | |
87f0e418 LP |
1809 | assert(u); |
1810 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1811 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1812 | |
8e471ccd LP |
1813 | /* Note that this is called for all low-level state changes, |
1814 | * even if they might map to the same high-level | |
865cc19a | 1815 | * UnitActiveState! That means that ns == os is an expected |
c5315881 | 1816 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1817 | * this function will be called too! */ |
87f0e418 | 1818 | |
546ac4f0 MS |
1819 | m = u->manager; |
1820 | ||
f755e3b7 | 1821 | /* Update timestamps for state changes */ |
546ac4f0 | 1822 | if (m->n_reloading <= 0) { |
bdbf9951 | 1823 | dual_timestamp ts; |
173e3821 | 1824 | |
bdbf9951 | 1825 | dual_timestamp_get(&ts); |
173e3821 | 1826 | |
bdbf9951 | 1827 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1828 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1829 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1830 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1831 | |
1832 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1833 | u->active_enter_timestamp = ts; |
bdbf9951 | 1834 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1835 | u->active_exit_timestamp = ts; |
bdbf9951 | 1836 | } |
87f0e418 | 1837 | |
865cc19a | 1838 | /* Keep track of failed units */ |
5269eb6b | 1839 | (void) manager_update_failed_units(u->manager, u, ns == UNIT_FAILED); |
f755e3b7 LP |
1840 | |
1841 | /* Make sure the cgroup is always removed when we become inactive */ | |
fdf20a31 | 1842 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
efdb0237 | 1843 | unit_prune_cgroup(u); |
fb385181 | 1844 | |
9cd86184 | 1845 | /* Note that this doesn't apply to RemainAfterExit services exiting |
6f285378 | 1846 | * successfully, since there's no change of state in that case. Which is |
9cd86184 | 1847 | * why it is handled in service_set_state() */ |
7ed9f6cd | 1848 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
1849 | ExecContext *ec; |
1850 | ||
1851 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 1852 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 ZJS |
1853 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
1854 | m->n_on_console --; | |
1855 | ||
1856 | if (m->n_on_console == 0) | |
1857 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 1858 | m->no_console_output = false; |
31a7eb86 ZJS |
1859 | } else |
1860 | m->n_on_console ++; | |
7ed9f6cd MS |
1861 | } |
1862 | } | |
1863 | ||
ac155bb8 | 1864 | if (u->job) { |
7e6e7b06 | 1865 | unexpected = false; |
87f0e418 | 1866 | |
ac155bb8 | 1867 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1868 | |
1869 | /* So we reached a different state for this | |
1870 | * job. Let's see if we can run it now if it | |
1871 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1872 | job_add_to_run_queue(u->job); |
87f0e418 | 1873 | |
b410e6b9 | 1874 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1875 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1876 | * hence needs to invalidate jobs. */ |
87f0e418 | 1877 | |
ac155bb8 | 1878 | switch (u->job->type) { |
87f0e418 | 1879 | |
b410e6b9 LP |
1880 | case JOB_START: |
1881 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1882 | |
b410e6b9 | 1883 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1884 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1885 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1886 | unexpected = true; |
41b02ec7 | 1887 | |
fdf20a31 | 1888 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1889 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1890 | } |
87f0e418 | 1891 | |
b410e6b9 | 1892 | break; |
87f0e418 | 1893 | |
b410e6b9 LP |
1894 | case JOB_RELOAD: |
1895 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1896 | |
ac155bb8 | 1897 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1898 | if (ns == UNIT_ACTIVE) |
5273510e | 1899 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1900 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1901 | unexpected = true; |
41b02ec7 | 1902 | |
fdf20a31 | 1903 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1904 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1905 | } |
b410e6b9 | 1906 | } |
87f0e418 | 1907 | |
b410e6b9 | 1908 | break; |
87f0e418 | 1909 | |
b410e6b9 LP |
1910 | case JOB_STOP: |
1911 | case JOB_RESTART: | |
1912 | case JOB_TRY_RESTART: | |
87f0e418 | 1913 | |
fdf20a31 | 1914 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1915 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1916 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1917 | unexpected = true; |
5273510e | 1918 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1919 | } |
87f0e418 | 1920 | |
b410e6b9 | 1921 | break; |
87f0e418 | 1922 | |
b410e6b9 LP |
1923 | default: |
1924 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1925 | } |
87f0e418 | 1926 | |
7e6e7b06 LP |
1927 | } else |
1928 | unexpected = true; | |
1929 | ||
546ac4f0 | 1930 | if (m->n_reloading <= 0) { |
f3bff0eb | 1931 | |
bdbf9951 LP |
1932 | /* If this state change happened without being |
1933 | * requested by a job, then let's retroactively start | |
1934 | * or stop dependencies. We skip that step when | |
1935 | * deserializing, since we don't want to create any | |
1936 | * additional jobs just because something is already | |
1937 | * activated. */ | |
1938 | ||
1939 | if (unexpected) { | |
1940 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1941 | retroactively_start_dependencies(u); | |
1942 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1943 | retroactively_stop_dependencies(u); | |
1944 | } | |
5de9682c | 1945 | |
cd0504d0 | 1946 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 1947 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
1948 | check_unneeded_dependencies(u); |
1949 | ||
bdbf9951 | 1950 | if (ns != os && ns == UNIT_FAILED) { |
f2341e0a | 1951 | log_unit_notice(u, "Unit entered failed state."); |
3ecaa09b | 1952 | unit_start_on_failure(u); |
cd6d0a45 | 1953 | } |
3b2775c5 | 1954 | } |
e537352b | 1955 | |
3b2775c5 LP |
1956 | /* Some names are special */ |
1957 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1958 | ||
1959 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
865cc19a | 1960 | /* The bus might have just become available, |
3b2775c5 LP |
1961 | * hence try to connect to it, if we aren't |
1962 | * yet connected. */ | |
546ac4f0 | 1963 | bus_init(m, true); |
3b2775c5 | 1964 | |
ac155bb8 | 1965 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1966 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
546ac4f0 | 1967 | m->n_reloading <= 0) { |
3b2775c5 | 1968 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 1969 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 1970 | u->in_audit = true; |
3b2775c5 | 1971 | } |
e983b760 | 1972 | |
3b2775c5 | 1973 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 1974 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 1975 | |
3b2775c5 | 1976 | } else { |
bdbf9951 | 1977 | |
3b2775c5 LP |
1978 | /* We don't care about D-Bus here, since we'll get an |
1979 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1980 | |
ac155bb8 | 1981 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1982 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1983 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
546ac4f0 | 1984 | m->n_reloading <= 0) { |
4927fcae | 1985 | |
3b2775c5 LP |
1986 | /* Hmm, if there was no start record written |
1987 | * write it now, so that we always have a nice | |
1988 | * pair */ | |
ac155bb8 | 1989 | if (!u->in_audit) { |
546ac4f0 | 1990 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 1991 | |
3b2775c5 | 1992 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 1993 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1994 | } else |
1995 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 1996 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1997 | |
ac155bb8 | 1998 | u->in_audit = false; |
cd6d0a45 | 1999 | } |
f278026d LP |
2000 | } |
2001 | ||
546ac4f0 | 2002 | manager_recheck_journal(m); |
3ecaa09b | 2003 | unit_trigger_notify(u); |
3b2775c5 | 2004 | |
ff502445 LP |
2005 | if (u->manager->n_reloading <= 0) { |
2006 | /* Maybe we finished startup and are now ready for | |
2007 | * being stopped because unneeded? */ | |
bf6dcfa6 | 2008 | unit_check_unneeded(u); |
c1e1601e | 2009 | |
ff502445 LP |
2010 | /* Maybe we finished startup, but something we needed |
2011 | * has vanished? Let's die then. (This happens when | |
2012 | * something BindsTo= to a Type=oneshot unit, as these | |
2013 | * units go directly from starting to inactive, | |
2014 | * without ever entering started.) */ | |
2015 | unit_check_binds_to(u); | |
2016 | } | |
2017 | ||
c1e1601e | 2018 | unit_add_to_dbus_queue(u); |
701cc384 | 2019 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2020 | } |
2021 | ||
87f0e418 | 2022 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
2023 | int q, r; |
2024 | ||
87f0e418 LP |
2025 | assert(u); |
2026 | assert(pid >= 1); | |
2027 | ||
5ba6985b LP |
2028 | /* Watch a specific PID. We only support one or two units |
2029 | * watching each PID for now, not more. */ | |
2030 | ||
d5099efc | 2031 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2032 | if (r < 0) |
2033 | return r; | |
2034 | ||
d5099efc | 2035 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL); |
a911bb9a LP |
2036 | if (r < 0) |
2037 | return r; | |
2038 | ||
fea72cc0 | 2039 | r = hashmap_put(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
5ba6985b | 2040 | if (r == -EEXIST) { |
d5099efc | 2041 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL); |
5ba6985b LP |
2042 | if (r < 0) |
2043 | return r; | |
05e343b7 | 2044 | |
fea72cc0 | 2045 | r = hashmap_put(u->manager->watch_pids2, PID_TO_PTR(pid), u); |
5ba6985b | 2046 | } |
a911bb9a | 2047 | |
fea72cc0 | 2048 | q = set_put(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2049 | if (q < 0) |
2050 | return q; | |
2051 | ||
2052 | return r; | |
87f0e418 LP |
2053 | } |
2054 | ||
2055 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
2056 | assert(u); | |
2057 | assert(pid >= 1); | |
2058 | ||
fea72cc0 LP |
2059 | (void) hashmap_remove_value(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
2060 | (void) hashmap_remove_value(u->manager->watch_pids2, PID_TO_PTR(pid), u); | |
2061 | (void) set_remove(u->pids, PID_TO_PTR(pid)); | |
a911bb9a LP |
2062 | } |
2063 | ||
bd44e61b LP |
2064 | void unit_unwatch_all_pids(Unit *u) { |
2065 | assert(u); | |
2066 | ||
2067 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2068 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2069 | |
efdb0237 | 2070 | u->pids = set_free(u->pids); |
a911bb9a LP |
2071 | } |
2072 | ||
2073 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2074 | Iterator i; | |
2075 | void *e; | |
2076 | ||
2077 | assert(u); | |
2078 | ||
2079 | /* Cleans dead PIDs from our list */ | |
2080 | ||
2081 | SET_FOREACH(e, u->pids, i) { | |
fea72cc0 | 2082 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2083 | |
2084 | if (pid == except1 || pid == except2) | |
2085 | continue; | |
2086 | ||
9f5650ae | 2087 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2088 | unit_unwatch_pid(u, pid); |
a911bb9a | 2089 | } |
87f0e418 LP |
2090 | } |
2091 | ||
87f0e418 LP |
2092 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2093 | assert(u); | |
2094 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2095 | ||
2096 | switch (j) { | |
2097 | ||
2098 | case JOB_VERIFY_ACTIVE: | |
2099 | case JOB_START: | |
57339f47 | 2100 | case JOB_STOP: |
e0209d83 | 2101 | case JOB_NOP: |
87f0e418 LP |
2102 | return true; |
2103 | ||
87f0e418 LP |
2104 | case JOB_RESTART: |
2105 | case JOB_TRY_RESTART: | |
2106 | return unit_can_start(u); | |
2107 | ||
2108 | case JOB_RELOAD: | |
2109 | return unit_can_reload(u); | |
2110 | ||
2111 | case JOB_RELOAD_OR_START: | |
2112 | return unit_can_reload(u) && unit_can_start(u); | |
2113 | ||
2114 | default: | |
2115 | assert_not_reached("Invalid job type"); | |
2116 | } | |
2117 | } | |
2118 | ||
f2341e0a LP |
2119 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2120 | assert(u); | |
d1fab3fe | 2121 | |
f2341e0a LP |
2122 | /* Only warn about some unit types */ |
2123 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2124 | return; | |
3f3cc397 | 2125 | |
f2341e0a LP |
2126 | if (streq_ptr(u->id, other)) |
2127 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2128 | else | |
2129 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2130 | } |
2131 | ||
701cc384 | 2132 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
2133 | |
2134 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2135 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 2136 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 2137 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 2138 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2139 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 2140 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 2141 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 2142 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 2143 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2144 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2145 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2146 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2147 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2148 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2149 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2150 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2151 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2152 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2153 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2154 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2155 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2156 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2157 | }; |
701cc384 | 2158 | int r, q = 0, v = 0, w = 0; |
d1fab3fe | 2159 | Unit *orig_u = u, *orig_other = other; |
87f0e418 LP |
2160 | |
2161 | assert(u); | |
2162 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2163 | assert(other); |
2164 | ||
9f151f29 LP |
2165 | u = unit_follow_merge(u); |
2166 | other = unit_follow_merge(other); | |
2167 | ||
87f0e418 LP |
2168 | /* We won't allow dependencies on ourselves. We will not |
2169 | * consider them an error however. */ | |
d1fab3fe | 2170 | if (u == other) { |
f2341e0a | 2171 | maybe_warn_about_dependency(orig_u, orig_other->id, d); |
87f0e418 | 2172 | return 0; |
d1fab3fe | 2173 | } |
87f0e418 | 2174 | |
d5099efc | 2175 | r = set_ensure_allocated(&u->dependencies[d], NULL); |
613b411c | 2176 | if (r < 0) |
87f0e418 LP |
2177 | return r; |
2178 | ||
613b411c | 2179 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
d5099efc | 2180 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], NULL); |
613b411c LP |
2181 | if (r < 0) |
2182 | return r; | |
2183 | } | |
2184 | ||
2185 | if (add_reference) { | |
d5099efc | 2186 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], NULL); |
613b411c | 2187 | if (r < 0) |
5de9682c LP |
2188 | return r; |
2189 | ||
d5099efc | 2190 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], NULL); |
613b411c | 2191 | if (r < 0) |
701cc384 | 2192 | return r; |
613b411c | 2193 | } |
87f0e418 | 2194 | |
613b411c LP |
2195 | q = set_put(u->dependencies[d], other); |
2196 | if (q < 0) | |
701cc384 | 2197 | return q; |
87f0e418 | 2198 | |
613b411c LP |
2199 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2200 | v = set_put(other->dependencies[inverse_table[d]], u); | |
2201 | if (v < 0) { | |
5de9682c LP |
2202 | r = v; |
2203 | goto fail; | |
2204 | } | |
613b411c | 2205 | } |
701cc384 LP |
2206 | |
2207 | if (add_reference) { | |
613b411c LP |
2208 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
2209 | if (w < 0) { | |
701cc384 LP |
2210 | r = w; |
2211 | goto fail; | |
2212 | } | |
2213 | ||
613b411c LP |
2214 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
2215 | if (r < 0) | |
701cc384 | 2216 | goto fail; |
87f0e418 LP |
2217 | } |
2218 | ||
c1e1601e | 2219 | unit_add_to_dbus_queue(u); |
87f0e418 | 2220 | return 0; |
701cc384 LP |
2221 | |
2222 | fail: | |
2223 | if (q > 0) | |
ac155bb8 | 2224 | set_remove(u->dependencies[d], other); |
701cc384 LP |
2225 | |
2226 | if (v > 0) | |
ac155bb8 | 2227 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
2228 | |
2229 | if (w > 0) | |
ac155bb8 | 2230 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
2231 | |
2232 | return r; | |
87f0e418 | 2233 | } |
0301abf4 | 2234 | |
2c966c03 LP |
2235 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
2236 | int r; | |
2237 | ||
2238 | assert(u); | |
2239 | ||
3f3cc397 LP |
2240 | r = unit_add_dependency(u, d, other, add_reference); |
2241 | if (r < 0) | |
2c966c03 LP |
2242 | return r; |
2243 | ||
7410616c | 2244 | return unit_add_dependency(u, e, other, add_reference); |
2c966c03 LP |
2245 | } |
2246 | ||
7410616c LP |
2247 | static int resolve_template(Unit *u, const char *name, const char*path, char **buf, const char **ret) { |
2248 | int r; | |
9e2f7c11 LP |
2249 | |
2250 | assert(u); | |
2251 | assert(name || path); | |
7410616c LP |
2252 | assert(buf); |
2253 | assert(ret); | |
9e2f7c11 LP |
2254 | |
2255 | if (!name) | |
2b6bf07d | 2256 | name = basename(path); |
9e2f7c11 | 2257 | |
7410616c LP |
2258 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2259 | *buf = NULL; | |
2260 | *ret = name; | |
2261 | return 0; | |
9e2f7c11 LP |
2262 | } |
2263 | ||
ac155bb8 | 2264 | if (u->instance) |
7410616c | 2265 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 2266 | else { |
ae018d9b | 2267 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2268 | |
7410616c LP |
2269 | r = unit_name_to_prefix(u->id, &i); |
2270 | if (r < 0) | |
2271 | return r; | |
9e2f7c11 | 2272 | |
7410616c | 2273 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 2274 | } |
7410616c LP |
2275 | if (r < 0) |
2276 | return r; | |
9e2f7c11 | 2277 | |
7410616c LP |
2278 | *ret = *buf; |
2279 | return 0; | |
9e2f7c11 LP |
2280 | } |
2281 | ||
701cc384 | 2282 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
7410616c | 2283 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
2284 | Unit *other; |
2285 | int r; | |
2286 | ||
9e2f7c11 LP |
2287 | assert(u); |
2288 | assert(name || path); | |
09b6b09f | 2289 | |
7410616c LP |
2290 | r = resolve_template(u, name, path, &buf, &name); |
2291 | if (r < 0) | |
2292 | return r; | |
09b6b09f | 2293 | |
8afbb8e1 LP |
2294 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2295 | if (r < 0) | |
2296 | return r; | |
9e2f7c11 | 2297 | |
8afbb8e1 | 2298 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
2299 | } |
2300 | ||
2c966c03 | 2301 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
7410616c | 2302 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2303 | Unit *other; |
2304 | int r; | |
2c966c03 LP |
2305 | |
2306 | assert(u); | |
2307 | assert(name || path); | |
2308 | ||
7410616c LP |
2309 | r = resolve_template(u, name, path, &buf, &name); |
2310 | if (r < 0) | |
2311 | return r; | |
2c966c03 | 2312 | |
3f3cc397 LP |
2313 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2314 | if (r < 0) | |
68eda4bd | 2315 | return r; |
2c966c03 | 2316 | |
3f3cc397 | 2317 | return unit_add_two_dependencies(u, d, e, other, add_reference); |
2c966c03 LP |
2318 | } |
2319 | ||
0301abf4 | 2320 | int set_unit_path(const char *p) { |
0301abf4 | 2321 | /* This is mostly for debug purposes */ |
cbe46ead | 2322 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 2323 | return -errno; |
0301abf4 LP |
2324 | |
2325 | return 0; | |
2326 | } | |
88066b3a | 2327 | |
ea430986 | 2328 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2329 | assert(u); |
2330 | ||
ac155bb8 | 2331 | if (!u->id) |
04ade7d2 LP |
2332 | return NULL; |
2333 | ||
48899192 | 2334 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2335 | } |
2336 | ||
d79200e2 LP |
2337 | int unit_set_slice(Unit *u, Unit *slice) { |
2338 | assert(u); | |
2339 | assert(slice); | |
2340 | ||
2341 | /* Sets the unit slice if it has not been set before. Is extra | |
2342 | * careful, to only allow this for units that actually have a | |
2343 | * cgroup context. Also, we don't allow to set this for slices | |
2344 | * (since the parent slice is derived from the name). Make | |
2345 | * sure the unit we set is actually a slice. */ | |
2346 | ||
2347 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
2348 | return -EOPNOTSUPP; | |
2349 | ||
2350 | if (u->type == UNIT_SLICE) | |
2351 | return -EINVAL; | |
2352 | ||
102ef982 LP |
2353 | if (unit_active_state(u) != UNIT_INACTIVE) |
2354 | return -EBUSY; | |
2355 | ||
d79200e2 LP |
2356 | if (slice->type != UNIT_SLICE) |
2357 | return -EINVAL; | |
2358 | ||
efdb0237 LP |
2359 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
2360 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
2361 | return -EPERM; | |
2362 | ||
d79200e2 LP |
2363 | if (UNIT_DEREF(u->slice) == slice) |
2364 | return 0; | |
2365 | ||
2366 | if (UNIT_ISSET(u->slice)) | |
2367 | return -EBUSY; | |
2368 | ||
2369 | unit_ref_set(&u->slice, slice); | |
2370 | return 1; | |
2371 | } | |
2372 | ||
2373 | int unit_set_default_slice(Unit *u) { | |
a8833944 LP |
2374 | _cleanup_free_ char *b = NULL; |
2375 | const char *slice_name; | |
a016b922 LP |
2376 | Unit *slice; |
2377 | int r; | |
2378 | ||
2379 | assert(u); | |
2380 | ||
9444b1f2 | 2381 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2382 | return 0; |
2383 | ||
a8833944 LP |
2384 | if (u->instance) { |
2385 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2386 | |
a8833944 LP |
2387 | /* Implicitly place all instantiated units in their |
2388 | * own per-template slice */ | |
2389 | ||
7410616c LP |
2390 | r = unit_name_to_prefix(u->id, &prefix); |
2391 | if (r < 0) | |
2392 | return r; | |
a8833944 LP |
2393 | |
2394 | /* The prefix is already escaped, but it might include | |
2395 | * "-" which has a special meaning for slice units, | |
2396 | * hence escape it here extra. */ | |
7410616c | 2397 | escaped = unit_name_escape(prefix); |
a8833944 LP |
2398 | if (!escaped) |
2399 | return -ENOMEM; | |
2400 | ||
b2c23da8 | 2401 | if (u->manager->running_as == MANAGER_SYSTEM) |
a8833944 LP |
2402 | b = strjoin("system-", escaped, ".slice", NULL); |
2403 | else | |
2404 | b = strappend(escaped, ".slice"); | |
2405 | if (!b) | |
2406 | return -ENOMEM; | |
2407 | ||
2408 | slice_name = b; | |
2409 | } else | |
2410 | slice_name = | |
efdb0237 | 2411 | u->manager->running_as == MANAGER_SYSTEM && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
2412 | ? SPECIAL_SYSTEM_SLICE |
2413 | : SPECIAL_ROOT_SLICE; | |
2414 | ||
2415 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2416 | if (r < 0) |
2417 | return r; | |
2418 | ||
d79200e2 | 2419 | return unit_set_slice(u, slice); |
a016b922 LP |
2420 | } |
2421 | ||
9444b1f2 LP |
2422 | const char *unit_slice_name(Unit *u) { |
2423 | assert(u); | |
2424 | ||
2425 | if (!UNIT_ISSET(u->slice)) | |
2426 | return NULL; | |
2427 | ||
2428 | return UNIT_DEREF(u->slice)->id; | |
2429 | } | |
2430 | ||
f6ff8c29 | 2431 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2432 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2433 | int r; |
2434 | ||
2435 | assert(u); | |
2436 | assert(type); | |
2437 | assert(_found); | |
2438 | ||
7410616c LP |
2439 | r = unit_name_change_suffix(u->id, type, &t); |
2440 | if (r < 0) | |
2441 | return r; | |
2442 | if (unit_has_name(u, t)) | |
2443 | return -EINVAL; | |
f6ff8c29 | 2444 | |
ac155bb8 | 2445 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2446 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2447 | return r; |
2448 | } | |
2449 | ||
bbc29086 DM |
2450 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
2451 | const char *name, *old_owner, *new_owner; | |
2452 | Unit *u = userdata; | |
2453 | int r; | |
2454 | ||
2455 | assert(message); | |
2456 | assert(u); | |
2457 | ||
2458 | r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner); | |
2459 | if (r < 0) { | |
2460 | bus_log_parse_error(r); | |
2461 | return 0; | |
2462 | } | |
2463 | ||
2464 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
2465 | UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); | |
2466 | ||
2467 | return 0; | |
2468 | } | |
2469 | ||
9806e87d LP |
2470 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
2471 | const char *match; | |
bbc29086 | 2472 | |
9806e87d LP |
2473 | assert(u); |
2474 | assert(bus); | |
2475 | assert(name); | |
bbc29086 DM |
2476 | |
2477 | if (u->match_bus_slot) | |
2478 | return -EBUSY; | |
2479 | ||
9806e87d | 2480 | match = strjoina("type='signal'," |
bbc29086 DM |
2481 | "sender='org.freedesktop.DBus'," |
2482 | "path='/org/freedesktop/DBus'," | |
2483 | "interface='org.freedesktop.DBus'," | |
2484 | "member='NameOwnerChanged'," | |
9806e87d | 2485 | "arg0='", name, "'", |
bbc29086 | 2486 | NULL); |
bbc29086 DM |
2487 | |
2488 | return sd_bus_add_match(bus, &u->match_bus_slot, match, signal_name_owner_changed, u); | |
2489 | } | |
2490 | ||
05e343b7 | 2491 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
2492 | int r; |
2493 | ||
05e343b7 LP |
2494 | assert(u); |
2495 | assert(name); | |
2496 | ||
2497 | /* Watch a specific name on the bus. We only support one unit | |
2498 | * watching each name for now. */ | |
2499 | ||
bbc29086 DM |
2500 | if (u->manager->api_bus) { |
2501 | /* If the bus is already available, install the match directly. | |
2502 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 2503 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 2504 | if (r < 0) |
8ea823b6 | 2505 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
2506 | } |
2507 | ||
2508 | r = hashmap_put(u->manager->watch_bus, name, u); | |
2509 | if (r < 0) { | |
2510 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
2511 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); | |
2512 | } | |
2513 | ||
2514 | return 0; | |
05e343b7 LP |
2515 | } |
2516 | ||
2517 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2518 | assert(u); | |
2519 | assert(name); | |
2520 | ||
ac155bb8 | 2521 | hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 2522 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
05e343b7 LP |
2523 | } |
2524 | ||
a16e1123 LP |
2525 | bool unit_can_serialize(Unit *u) { |
2526 | assert(u); | |
2527 | ||
2528 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2529 | } | |
2530 | ||
6b78f9b4 | 2531 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2532 | int r; |
2533 | ||
2534 | assert(u); | |
2535 | assert(f); | |
2536 | assert(fds); | |
2537 | ||
9bdb98c5 LP |
2538 | if (unit_can_serialize(u)) { |
2539 | ExecRuntime *rt; | |
a16e1123 | 2540 | |
9bdb98c5 | 2541 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
2542 | if (r < 0) |
2543 | return r; | |
9bdb98c5 LP |
2544 | |
2545 | rt = unit_get_exec_runtime(u); | |
2546 | if (rt) { | |
f2341e0a | 2547 | r = exec_runtime_serialize(u, rt, f, fds); |
9bdb98c5 LP |
2548 | if (r < 0) |
2549 | return r; | |
2550 | } | |
e0209d83 MS |
2551 | } |
2552 | ||
ac155bb8 MS |
2553 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2554 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2555 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2556 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2557 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
59fccdc5 | 2558 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 2559 | |
ac155bb8 MS |
2560 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2561 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2562 | |
59fccdc5 LP |
2563 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
2564 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
2565 | ||
c2756a68 | 2566 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
5ad096b3 | 2567 | unit_serialize_item_format(u, f, "cpuacct-usage-base", "%" PRIu64, u->cpuacct_usage_base); |
c2756a68 LP |
2568 | |
2569 | if (u->cgroup_path) | |
2570 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
de1d4f9b | 2571 | unit_serialize_item(u, f, "cgroup-realized", yes_no(u->cgroup_realized)); |
c2756a68 | 2572 | |
32ee7d33 DM |
2573 | if (u->cgroup_netclass_id) |
2574 | unit_serialize_item_format(u, f, "netclass-id", "%" PRIu32, u->cgroup_netclass_id); | |
2575 | ||
613b411c LP |
2576 | if (serialize_jobs) { |
2577 | if (u->job) { | |
2578 | fprintf(f, "job\n"); | |
2579 | job_serialize(u->job, f, fds); | |
2580 | } | |
2581 | ||
2582 | if (u->nop_job) { | |
2583 | fprintf(f, "job\n"); | |
2584 | job_serialize(u->nop_job, f, fds); | |
2585 | } | |
2586 | } | |
2587 | ||
a16e1123 LP |
2588 | /* End marker */ |
2589 | fputc('\n', f); | |
2590 | return 0; | |
2591 | } | |
2592 | ||
a34ceba6 LP |
2593 | int unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { |
2594 | assert(u); | |
2595 | assert(f); | |
2596 | assert(key); | |
2597 | ||
2598 | if (!value) | |
2599 | return 0; | |
2600 | ||
2601 | fputs(key, f); | |
2602 | fputc('=', f); | |
2603 | fputs(value, f); | |
2604 | fputc('\n', f); | |
2605 | ||
2606 | return 1; | |
2607 | } | |
2608 | ||
2609 | int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *value) { | |
2610 | _cleanup_free_ char *c = NULL; | |
2611 | ||
2612 | assert(u); | |
2613 | assert(f); | |
2614 | assert(key); | |
2615 | ||
2616 | if (!value) | |
2617 | return 0; | |
2618 | ||
2619 | c = cescape(value); | |
2620 | if (!c) | |
2621 | return -ENOMEM; | |
2622 | ||
2623 | fputs(key, f); | |
2624 | fputc('=', f); | |
2625 | fputs(c, f); | |
2626 | fputc('\n', f); | |
2627 | ||
2628 | return 1; | |
2629 | } | |
2630 | ||
2631 | int unit_serialize_item_fd(Unit *u, FILE *f, FDSet *fds, const char *key, int fd) { | |
2632 | int copy; | |
2633 | ||
2634 | assert(u); | |
2635 | assert(f); | |
2636 | assert(key); | |
2637 | ||
2638 | if (fd < 0) | |
2639 | return 0; | |
2640 | ||
2641 | copy = fdset_put_dup(fds, fd); | |
2642 | if (copy < 0) | |
2643 | return copy; | |
2644 | ||
2645 | fprintf(f, "%s=%i\n", key, copy); | |
2646 | return 1; | |
2647 | } | |
2648 | ||
a16e1123 LP |
2649 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { |
2650 | va_list ap; | |
2651 | ||
2652 | assert(u); | |
2653 | assert(f); | |
2654 | assert(key); | |
2655 | assert(format); | |
2656 | ||
2657 | fputs(key, f); | |
2658 | fputc('=', f); | |
2659 | ||
2660 | va_start(ap, format); | |
2661 | vfprintf(f, format, ap); | |
2662 | va_end(ap); | |
2663 | ||
2664 | fputc('\n', f); | |
2665 | } | |
2666 | ||
a16e1123 | 2667 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
28b99ccd | 2668 | ExecRuntime **rt = NULL; |
9bdb98c5 | 2669 | size_t offset; |
a16e1123 LP |
2670 | int r; |
2671 | ||
2672 | assert(u); | |
2673 | assert(f); | |
2674 | assert(fds); | |
2675 | ||
613b411c LP |
2676 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2677 | if (offset > 0) | |
2678 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
2679 | ||
a16e1123 | 2680 | for (;;) { |
20c03b7b | 2681 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2682 | size_t k; |
2683 | ||
2684 | if (!fgets(line, sizeof(line), f)) { | |
2685 | if (feof(f)) | |
2686 | return 0; | |
2687 | return -errno; | |
2688 | } | |
2689 | ||
10f8e83c | 2690 | char_array_0(line); |
a16e1123 LP |
2691 | l = strstrip(line); |
2692 | ||
2693 | /* End marker */ | |
e911de99 | 2694 | if (isempty(l)) |
a16e1123 LP |
2695 | return 0; |
2696 | ||
2697 | k = strcspn(l, "="); | |
2698 | ||
2699 | if (l[k] == '=') { | |
2700 | l[k] = 0; | |
2701 | v = l+k+1; | |
2702 | } else | |
2703 | v = l+k; | |
2704 | ||
cca098b0 | 2705 | if (streq(l, "job")) { |
39a18c60 MS |
2706 | if (v[0] == '\0') { |
2707 | /* new-style serialized job */ | |
9c3349e2 LP |
2708 | Job *j; |
2709 | ||
2710 | j = job_new_raw(u); | |
39a18c60 | 2711 | if (!j) |
e911de99 | 2712 | return log_oom(); |
39a18c60 MS |
2713 | |
2714 | r = job_deserialize(j, f, fds); | |
2715 | if (r < 0) { | |
2716 | job_free(j); | |
2717 | return r; | |
2718 | } | |
cca098b0 | 2719 | |
39a18c60 MS |
2720 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2721 | if (r < 0) { | |
2722 | job_free(j); | |
2723 | return r; | |
2724 | } | |
e0209d83 MS |
2725 | |
2726 | r = job_install_deserialized(j); | |
2727 | if (r < 0) { | |
2728 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2729 | job_free(j); | |
2730 | return r; | |
2731 | } | |
ed10fa8c LP |
2732 | } else /* legacy for pre-44 */ |
2733 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); | |
cca098b0 | 2734 | continue; |
8aaf019b | 2735 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2736 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2737 | continue; |
2738 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2739 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2740 | continue; |
2741 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2742 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2743 | continue; |
2744 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2745 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2746 | continue; |
2791a8f8 | 2747 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2748 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 2749 | continue; |
59fccdc5 LP |
2750 | } else if (streq(l, "assert-timestamp")) { |
2751 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
2752 | continue; | |
2791a8f8 | 2753 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 2754 | |
e911de99 LP |
2755 | r = parse_boolean(v); |
2756 | if (r < 0) | |
f2341e0a | 2757 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 2758 | else |
e911de99 | 2759 | u->condition_result = r; |
efbac6d2 LP |
2760 | |
2761 | continue; | |
c2756a68 | 2762 | |
59fccdc5 | 2763 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 2764 | |
e911de99 LP |
2765 | r = parse_boolean(v); |
2766 | if (r < 0) | |
f2341e0a | 2767 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 2768 | else |
e911de99 | 2769 | u->assert_result = r; |
59fccdc5 LP |
2770 | |
2771 | continue; | |
2772 | ||
c2756a68 | 2773 | } else if (streq(l, "transient")) { |
c2756a68 | 2774 | |
e911de99 LP |
2775 | r = parse_boolean(v); |
2776 | if (r < 0) | |
f2341e0a | 2777 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 2778 | else |
e911de99 | 2779 | u->transient = r; |
c2756a68 LP |
2780 | |
2781 | continue; | |
e911de99 | 2782 | |
5ad096b3 LP |
2783 | } else if (streq(l, "cpuacct-usage-base")) { |
2784 | ||
2785 | r = safe_atou64(v, &u->cpuacct_usage_base); | |
2786 | if (r < 0) | |
f2341e0a | 2787 | log_unit_debug(u, "Failed to parse CPU usage %s, ignoring.", v); |
5ad096b3 | 2788 | |
0f908397 | 2789 | continue; |
4e595329 | 2790 | |
e911de99 | 2791 | } else if (streq(l, "cgroup")) { |
72673e86 | 2792 | |
e911de99 LP |
2793 | r = unit_set_cgroup_path(u, v); |
2794 | if (r < 0) | |
f2341e0a | 2795 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 2796 | |
efdb0237 LP |
2797 | (void) unit_watch_cgroup(u); |
2798 | ||
de1d4f9b WF |
2799 | continue; |
2800 | } else if (streq(l, "cgroup-realized")) { | |
2801 | int b; | |
2802 | ||
2803 | b = parse_boolean(v); | |
2804 | if (b < 0) | |
2805 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
2806 | else | |
2807 | u->cgroup_realized = b; | |
2808 | ||
32ee7d33 DM |
2809 | continue; |
2810 | } else if (streq(l, "netclass-id")) { | |
2811 | r = safe_atou32(v, &u->cgroup_netclass_id); | |
2812 | if (r < 0) | |
2813 | log_unit_debug(u, "Failed to parse netclass ID %s, ignoring.", v); | |
2814 | else { | |
2815 | r = unit_add_to_netclass_cgroup(u); | |
2816 | if (r < 0) | |
2817 | log_unit_debug_errno(u, r, "Failed to add unit to netclass cgroup, ignoring: %m"); | |
2818 | } | |
2819 | ||
c2756a68 | 2820 | continue; |
8aaf019b | 2821 | } |
cca098b0 | 2822 | |
9bdb98c5 LP |
2823 | if (unit_can_serialize(u)) { |
2824 | if (rt) { | |
f2341e0a | 2825 | r = exec_runtime_deserialize_item(u, rt, l, v, fds); |
e911de99 | 2826 | if (r < 0) { |
f2341e0a | 2827 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); |
e911de99 LP |
2828 | continue; |
2829 | } | |
2830 | ||
2831 | /* Returns positive if key was handled by the call */ | |
9bdb98c5 LP |
2832 | if (r > 0) |
2833 | continue; | |
2834 | } | |
2835 | ||
2836 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); | |
613b411c | 2837 | if (r < 0) |
f2341e0a | 2838 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 2839 | } |
a16e1123 LP |
2840 | } |
2841 | } | |
2842 | ||
6e2ef85b LP |
2843 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2844 | Unit *device; | |
68eda4bd | 2845 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
2846 | int r; |
2847 | ||
2848 | assert(u); | |
2849 | ||
6e2ef85b | 2850 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
2851 | if (isempty(what)) |
2852 | return 0; | |
6e2ef85b | 2853 | |
8407a5d0 | 2854 | if (!is_device_path(what)) |
6e2ef85b LP |
2855 | return 0; |
2856 | ||
47bc12e1 LP |
2857 | /* When device units aren't supported (such as in a |
2858 | * container), don't create dependencies on them. */ | |
1c2e9646 | 2859 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
2860 | return 0; |
2861 | ||
7410616c LP |
2862 | r = unit_name_from_path(what, ".device", &e); |
2863 | if (r < 0) | |
2864 | return r; | |
6e2ef85b | 2865 | |
ac155bb8 | 2866 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
2867 | if (r < 0) |
2868 | return r; | |
2869 | ||
b2c23da8 | 2870 | r = unit_add_two_dependencies(u, UNIT_AFTER, u->manager->running_as == MANAGER_SYSTEM ? UNIT_BINDS_TO : UNIT_WANTS, device, true); |
faa368e3 | 2871 | if (r < 0) |
6e2ef85b LP |
2872 | return r; |
2873 | ||
faa368e3 LP |
2874 | if (wants) { |
2875 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2876 | if (r < 0) | |
6e2ef85b | 2877 | return r; |
faa368e3 | 2878 | } |
6e2ef85b LP |
2879 | |
2880 | return 0; | |
2881 | } | |
a16e1123 | 2882 | |
be847e82 | 2883 | int unit_coldplug(Unit *u) { |
5a6158b6 | 2884 | int r = 0, q = 0; |
cca098b0 LP |
2885 | |
2886 | assert(u); | |
2887 | ||
f78f265f LP |
2888 | /* Make sure we don't enter a loop, when coldplugging |
2889 | * recursively. */ | |
2890 | if (u->coldplugged) | |
2891 | return 0; | |
2892 | ||
2893 | u->coldplugged = true; | |
2894 | ||
5a6158b6 | 2895 | if (UNIT_VTABLE(u)->coldplug) |
f78f265f | 2896 | r = UNIT_VTABLE(u)->coldplug(u); |
cca098b0 | 2897 | |
5a6158b6 LP |
2898 | if (u->job) |
2899 | q = job_coldplug(u->job); | |
2900 | ||
2901 | if (r < 0) | |
2902 | return r; | |
2903 | if (q < 0) | |
2904 | return q; | |
cca098b0 LP |
2905 | |
2906 | return 0; | |
2907 | } | |
2908 | ||
45fb0699 | 2909 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
2910 | _cleanup_strv_free_ char **t = NULL; |
2911 | char **path; | |
1b64d026 | 2912 | struct stat st; |
ae7a7182 | 2913 | unsigned loaded_cnt, current_cnt; |
1b64d026 | 2914 | |
45fb0699 LP |
2915 | assert(u); |
2916 | ||
ac155bb8 | 2917 | if (u->fragment_path) { |
5f4b19f4 | 2918 | zero(st); |
ac155bb8 | 2919 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2920 | /* What, cannot access this anymore? */ |
2921 | return true; | |
45fb0699 | 2922 | |
ac155bb8 MS |
2923 | if (u->fragment_mtime > 0 && |
2924 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2925 | return true; |
2926 | } | |
2927 | ||
1b64d026 LP |
2928 | if (u->source_path) { |
2929 | zero(st); | |
2930 | if (stat(u->source_path, &st) < 0) | |
2931 | return true; | |
2932 | ||
2933 | if (u->source_mtime > 0 && | |
2934 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2935 | return true; | |
2936 | } | |
5f4b19f4 | 2937 | |
1a7f1b38 | 2938 | (void) unit_find_dropin_paths(u, &t); |
ae7a7182 OS |
2939 | loaded_cnt = strv_length(t); |
2940 | current_cnt = strv_length(u->dropin_paths); | |
2941 | ||
2942 | if (loaded_cnt == current_cnt) { | |
2943 | if (loaded_cnt == 0) | |
2944 | return false; | |
2945 | ||
2946 | if (strv_overlap(u->dropin_paths, t)) { | |
2947 | STRV_FOREACH(path, u->dropin_paths) { | |
2948 | zero(st); | |
2949 | if (stat(*path, &st) < 0) | |
2950 | return true; | |
2951 | ||
2952 | if (u->dropin_mtime > 0 && | |
2953 | timespec_load(&st.st_mtim) > u->dropin_mtime) | |
2954 | return true; | |
2955 | } | |
2956 | ||
2957 | return false; | |
2958 | } else | |
2959 | return true; | |
2960 | } else | |
2961 | return true; | |
45fb0699 LP |
2962 | } |
2963 | ||
fdf20a31 | 2964 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2965 | assert(u); |
2966 | ||
fdf20a31 MM |
2967 | if (UNIT_VTABLE(u)->reset_failed) |
2968 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2969 | } |
2970 | ||
a7f241db LP |
2971 | Unit *unit_following(Unit *u) { |
2972 | assert(u); | |
2973 | ||
2974 | if (UNIT_VTABLE(u)->following) | |
2975 | return UNIT_VTABLE(u)->following(u); | |
2976 | ||
2977 | return NULL; | |
2978 | } | |
2979 | ||
31afa0a4 | 2980 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
2981 | assert(u); |
2982 | ||
31afa0a4 LP |
2983 | /* This call does check the current state of the unit. It's |
2984 | * hence useful to be called from state change calls of the | |
2985 | * unit itself, where the state isn't updated yet. This is | |
2986 | * different from unit_inactive_or_pending() which checks both | |
2987 | * the current state and for a queued job. */ | |
18ffdfda | 2988 | |
31afa0a4 LP |
2989 | return u->job && u->job->type == JOB_STOP; |
2990 | } | |
2991 | ||
2992 | bool unit_inactive_or_pending(Unit *u) { | |
2993 | assert(u); | |
2994 | ||
2995 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 2996 | |
d956ac29 LP |
2997 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
2998 | return true; | |
2999 | ||
31afa0a4 | 3000 | if (unit_stop_pending(u)) |
18ffdfda LP |
3001 | return true; |
3002 | ||
3003 | return false; | |
3004 | } | |
3005 | ||
31afa0a4 | 3006 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3007 | assert(u); |
3008 | ||
f60c2665 | 3009 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3010 | |
3011 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3012 | return true; | |
3013 | ||
ac155bb8 MS |
3014 | if (u->job && |
3015 | (u->job->type == JOB_START || | |
3016 | u->job->type == JOB_RELOAD_OR_START || | |
3017 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
3018 | return true; |
3019 | ||
3020 | return false; | |
3021 | } | |
3022 | ||
718db961 | 3023 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3024 | assert(u); |
3025 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
3026 | assert(signo > 0); |
3027 | assert(signo < _NSIG); | |
3028 | ||
8a0867d6 | 3029 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3030 | return -EOPNOTSUPP; |
8a0867d6 | 3031 | |
c74f17d9 | 3032 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3033 | } |
3034 | ||
82659fd7 LP |
3035 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
3036 | Set *pid_set; | |
3037 | int r; | |
3038 | ||
d5099efc | 3039 | pid_set = set_new(NULL); |
82659fd7 LP |
3040 | if (!pid_set) |
3041 | return NULL; | |
3042 | ||
3043 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3044 | if (main_pid > 0) { | |
fea72cc0 | 3045 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 LP |
3046 | if (r < 0) |
3047 | goto fail; | |
3048 | } | |
3049 | ||
3050 | if (control_pid > 0) { | |
fea72cc0 | 3051 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 LP |
3052 | if (r < 0) |
3053 | goto fail; | |
3054 | } | |
3055 | ||
3056 | return pid_set; | |
3057 | ||
3058 | fail: | |
3059 | set_free(pid_set); | |
3060 | return NULL; | |
3061 | } | |
3062 | ||
d91c34f2 LP |
3063 | int unit_kill_common( |
3064 | Unit *u, | |
3065 | KillWho who, | |
3066 | int signo, | |
3067 | pid_t main_pid, | |
3068 | pid_t control_pid, | |
718db961 | 3069 | sd_bus_error *error) { |
d91c34f2 | 3070 | |
814cc562 | 3071 | int r = 0; |
ac5e3a50 | 3072 | bool killed = false; |
814cc562 | 3073 | |
ac5e3a50 | 3074 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3075 | if (main_pid < 0) |
7358dc02 | 3076 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 3077 | else if (main_pid == 0) |
7358dc02 | 3078 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3079 | } |
3080 | ||
ac5e3a50 | 3081 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3082 | if (control_pid < 0) |
7358dc02 | 3083 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 3084 | else if (control_pid == 0) |
7358dc02 | 3085 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3086 | } |
3087 | ||
ac5e3a50 JS |
3088 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3089 | if (control_pid > 0) { | |
814cc562 MS |
3090 | if (kill(control_pid, signo) < 0) |
3091 | r = -errno; | |
ac5e3a50 JS |
3092 | else |
3093 | killed = true; | |
3094 | } | |
814cc562 | 3095 | |
ac5e3a50 JS |
3096 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3097 | if (main_pid > 0) { | |
814cc562 MS |
3098 | if (kill(main_pid, signo) < 0) |
3099 | r = -errno; | |
ac5e3a50 JS |
3100 | else |
3101 | killed = true; | |
3102 | } | |
814cc562 | 3103 | |
ac5e3a50 | 3104 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3105 | _cleanup_set_free_ Set *pid_set = NULL; |
3106 | int q; | |
3107 | ||
82659fd7 LP |
3108 | /* Exclude the main/control pids from being killed via the cgroup */ |
3109 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3110 | if (!pid_set) |
3111 | return -ENOMEM; | |
3112 | ||
d0667321 | 3113 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, false, false, pid_set); |
814cc562 MS |
3114 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
3115 | r = q; | |
ac5e3a50 JS |
3116 | else |
3117 | killed = true; | |
814cc562 MS |
3118 | } |
3119 | ||
ac5e3a50 JS |
3120 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL, KILL_ALL_FAIL)) |
3121 | return -ESRCH; | |
3122 | ||
814cc562 MS |
3123 | return r; |
3124 | } | |
3125 | ||
6210e7fc LP |
3126 | int unit_following_set(Unit *u, Set **s) { |
3127 | assert(u); | |
3128 | assert(s); | |
3129 | ||
3130 | if (UNIT_VTABLE(u)->following_set) | |
3131 | return UNIT_VTABLE(u)->following_set(u, s); | |
3132 | ||
3133 | *s = NULL; | |
3134 | return 0; | |
3135 | } | |
3136 | ||
a4375746 | 3137 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
3138 | int r; |
3139 | ||
a4375746 LP |
3140 | assert(u); |
3141 | ||
0ec0deaa LP |
3142 | if (u->unit_file_state < 0 && u->fragment_path) { |
3143 | r = unit_file_get_state( | |
b2c23da8 | 3144 | u->manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
0ec0deaa LP |
3145 | NULL, |
3146 | basename(u->fragment_path), | |
3147 | &u->unit_file_state); | |
3148 | if (r < 0) | |
3149 | u->unit_file_state = UNIT_FILE_BAD; | |
3150 | } | |
a4375746 | 3151 | |
ac155bb8 | 3152 | return u->unit_file_state; |
a4375746 LP |
3153 | } |
3154 | ||
d2dc52db LP |
3155 | int unit_get_unit_file_preset(Unit *u) { |
3156 | assert(u); | |
3157 | ||
3158 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3159 | u->unit_file_preset = unit_file_query_preset( | |
b2c23da8 | 3160 | u->manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
0ec0deaa LP |
3161 | NULL, |
3162 | basename(u->fragment_path)); | |
d2dc52db LP |
3163 | |
3164 | return u->unit_file_preset; | |
3165 | } | |
3166 | ||
57020a3a LP |
3167 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
3168 | assert(ref); | |
3169 | assert(u); | |
3170 | ||
3171 | if (ref->unit) | |
3172 | unit_ref_unset(ref); | |
3173 | ||
3174 | ref->unit = u; | |
71fda00f | 3175 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
3176 | return u; |
3177 | } | |
3178 | ||
3179 | void unit_ref_unset(UnitRef *ref) { | |
3180 | assert(ref); | |
3181 | ||
3182 | if (!ref->unit) | |
3183 | return; | |
3184 | ||
71fda00f | 3185 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
3186 | ref->unit = NULL; |
3187 | } | |
3188 | ||
598459ce LP |
3189 | int unit_patch_contexts(Unit *u) { |
3190 | CGroupContext *cc; | |
3191 | ExecContext *ec; | |
cba6e062 LP |
3192 | unsigned i; |
3193 | int r; | |
3194 | ||
e06c73cc | 3195 | assert(u); |
e06c73cc | 3196 | |
598459ce LP |
3197 | /* Patch in the manager defaults into the exec and cgroup |
3198 | * contexts, _after_ the rest of the settings have been | |
3199 | * initialized */ | |
085afe36 | 3200 | |
598459ce LP |
3201 | ec = unit_get_exec_context(u); |
3202 | if (ec) { | |
3203 | /* This only copies in the ones that need memory */ | |
3204 | for (i = 0; i < _RLIMIT_MAX; i++) | |
3205 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
3206 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
3207 | if (!ec->rlimit[i]) | |
3208 | return -ENOMEM; | |
3209 | } | |
3210 | ||
b2c23da8 | 3211 | if (u->manager->running_as == MANAGER_USER && |
598459ce LP |
3212 | !ec->working_directory) { |
3213 | ||
3214 | r = get_home_dir(&ec->working_directory); | |
3215 | if (r < 0) | |
3216 | return r; | |
4c08c824 LP |
3217 | |
3218 | /* Allow user services to run, even if the | |
3219 | * home directory is missing */ | |
3220 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
3221 | } |
3222 | ||
b2c23da8 | 3223 | if (u->manager->running_as == MANAGER_USER && |
598459ce LP |
3224 | (ec->syscall_whitelist || |
3225 | !set_isempty(ec->syscall_filter) || | |
3226 | !set_isempty(ec->syscall_archs) || | |
3227 | ec->address_families_whitelist || | |
3228 | !set_isempty(ec->address_families))) | |
3229 | ec->no_new_privileges = true; | |
e06c73cc | 3230 | |
598459ce LP |
3231 | if (ec->private_devices) |
3232 | ec->capability_bounding_set_drop |= (uint64_t) 1ULL << (uint64_t) CAP_MKNOD; | |
cba6e062 LP |
3233 | } |
3234 | ||
598459ce LP |
3235 | cc = unit_get_cgroup_context(u); |
3236 | if (cc) { | |
f513e420 | 3237 | |
598459ce LP |
3238 | if (ec && |
3239 | ec->private_devices && | |
3240 | cc->device_policy == CGROUP_AUTO) | |
3241 | cc->device_policy = CGROUP_CLOSED; | |
3242 | } | |
f1660f96 | 3243 | |
cba6e062 | 3244 | return 0; |
e06c73cc LP |
3245 | } |
3246 | ||
3ef63c31 LP |
3247 | ExecContext *unit_get_exec_context(Unit *u) { |
3248 | size_t offset; | |
3249 | assert(u); | |
3250 | ||
598459ce LP |
3251 | if (u->type < 0) |
3252 | return NULL; | |
3253 | ||
3ef63c31 LP |
3254 | offset = UNIT_VTABLE(u)->exec_context_offset; |
3255 | if (offset <= 0) | |
3256 | return NULL; | |
3257 | ||
3258 | return (ExecContext*) ((uint8_t*) u + offset); | |
3259 | } | |
3260 | ||
718db961 LP |
3261 | KillContext *unit_get_kill_context(Unit *u) { |
3262 | size_t offset; | |
3263 | assert(u); | |
3264 | ||
598459ce LP |
3265 | if (u->type < 0) |
3266 | return NULL; | |
3267 | ||
718db961 LP |
3268 | offset = UNIT_VTABLE(u)->kill_context_offset; |
3269 | if (offset <= 0) | |
3270 | return NULL; | |
3271 | ||
3272 | return (KillContext*) ((uint8_t*) u + offset); | |
3273 | } | |
3274 | ||
4ad49000 LP |
3275 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
3276 | size_t offset; | |
3277 | ||
598459ce LP |
3278 | if (u->type < 0) |
3279 | return NULL; | |
3280 | ||
4ad49000 LP |
3281 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
3282 | if (offset <= 0) | |
3283 | return NULL; | |
3284 | ||
3285 | return (CGroupContext*) ((uint8_t*) u + offset); | |
3286 | } | |
3287 | ||
613b411c LP |
3288 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
3289 | size_t offset; | |
3290 | ||
598459ce LP |
3291 | if (u->type < 0) |
3292 | return NULL; | |
3293 | ||
613b411c LP |
3294 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
3295 | if (offset <= 0) | |
3296 | return NULL; | |
3297 | ||
3298 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
3299 | } | |
3300 | ||
29686440 | 3301 | static int unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode, bool transient, char **dir) { |
3f5e8115 LP |
3302 | assert(u); |
3303 | ||
b2c23da8 | 3304 | if (u->manager->running_as == MANAGER_USER) { |
29686440 | 3305 | int r; |
26d04f86 | 3306 | |
718880ba SA |
3307 | if (mode == UNIT_PERSISTENT && !transient) |
3308 | r = user_config_home(dir); | |
3309 | else | |
4d5dec23 | 3310 | r = user_runtime_dir(dir); |
26d04f86 LP |
3311 | if (r == 0) |
3312 | return -ENOENT; | |
3f5e8115 | 3313 | |
29686440 ZJS |
3314 | return r; |
3315 | } | |
26d04f86 | 3316 | |
29686440 ZJS |
3317 | if (mode == UNIT_PERSISTENT && !transient) |
3318 | *dir = strdup("/etc/systemd/system"); | |
8e2af478 | 3319 | else |
29686440 ZJS |
3320 | *dir = strdup("/run/systemd/system"); |
3321 | if (!*dir) | |
71645aca LP |
3322 | return -ENOMEM; |
3323 | ||
26d04f86 | 3324 | return 0; |
71645aca LP |
3325 | } |
3326 | ||
8e2af478 | 3327 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
29686440 | 3328 | |
adb76a70 | 3329 | _cleanup_free_ char *dir = NULL, *p = NULL, *q = NULL; |
26d04f86 | 3330 | int r; |
71645aca LP |
3331 | |
3332 | assert(u); | |
3333 | ||
6d235724 | 3334 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3335 | return 0; |
3336 | ||
29686440 | 3337 | r = unit_drop_in_dir(u, mode, u->transient, &dir); |
26d04f86 LP |
3338 | if (r < 0) |
3339 | return r; | |
71645aca | 3340 | |
adb76a70 WC |
3341 | r = write_drop_in(dir, u->id, 50, name, data); |
3342 | if (r < 0) | |
3343 | return r; | |
3344 | ||
3345 | r = drop_in_file(dir, u->id, 50, name, &p, &q); | |
3346 | if (r < 0) | |
3347 | return r; | |
3348 | ||
3349 | r = strv_extend(&u->dropin_paths, q); | |
3350 | if (r < 0) | |
3351 | return r; | |
3352 | ||
3353 | strv_sort(u->dropin_paths); | |
3354 | strv_uniq(u->dropin_paths); | |
3355 | ||
3356 | u->dropin_mtime = now(CLOCK_REALTIME); | |
3357 | ||
3358 | return 0; | |
26d04f86 | 3359 | } |
71645aca | 3360 | |
b9ec9359 LP |
3361 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3362 | _cleanup_free_ char *p = NULL; | |
3363 | va_list ap; | |
3364 | int r; | |
3365 | ||
3366 | assert(u); | |
3367 | assert(name); | |
3368 | assert(format); | |
3369 | ||
6d235724 | 3370 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3371 | return 0; |
3372 | ||
3373 | va_start(ap, format); | |
3374 | r = vasprintf(&p, format, ap); | |
3375 | va_end(ap); | |
3376 | ||
3377 | if (r < 0) | |
3378 | return -ENOMEM; | |
3379 | ||
3380 | return unit_write_drop_in(u, mode, name, p); | |
3381 | } | |
3382 | ||
3383 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
b42defe3 LP |
3384 | _cleanup_free_ char *ndata = NULL; |
3385 | ||
3386 | assert(u); | |
3387 | assert(name); | |
3388 | assert(data); | |
3389 | ||
3390 | if (!UNIT_VTABLE(u)->private_section) | |
3391 | return -EINVAL; | |
3392 | ||
6d235724 | 3393 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3394 | return 0; |
3395 | ||
b42defe3 LP |
3396 | ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL); |
3397 | if (!ndata) | |
3398 | return -ENOMEM; | |
3399 | ||
3400 | return unit_write_drop_in(u, mode, name, ndata); | |
3401 | } | |
3402 | ||
b9ec9359 LP |
3403 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3404 | _cleanup_free_ char *p = NULL; | |
3405 | va_list ap; | |
3406 | int r; | |
3407 | ||
3408 | assert(u); | |
3409 | assert(name); | |
3410 | assert(format); | |
3411 | ||
6d235724 | 3412 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3413 | return 0; |
3414 | ||
3415 | va_start(ap, format); | |
3416 | r = vasprintf(&p, format, ap); | |
3417 | va_end(ap); | |
3418 | ||
3419 | if (r < 0) | |
3420 | return -ENOMEM; | |
3421 | ||
3422 | return unit_write_drop_in_private(u, mode, name, p); | |
3423 | } | |
71645aca | 3424 | |
c2756a68 | 3425 | int unit_make_transient(Unit *u) { |
c2756a68 LP |
3426 | assert(u); |
3427 | ||
3f5e8115 LP |
3428 | if (!UNIT_VTABLE(u)->can_transient) |
3429 | return -EOPNOTSUPP; | |
3430 | ||
c2756a68 LP |
3431 | u->load_state = UNIT_STUB; |
3432 | u->load_error = 0; | |
3433 | u->transient = true; | |
7c65093a | 3434 | |
3f5e8115 | 3435 | u->fragment_path = mfree(u->fragment_path); |
7c65093a LP |
3436 | u->source_path = mfree(u->source_path); |
3437 | u->dropin_paths = strv_free(u->dropin_paths); | |
3438 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
3439 | ||
3440 | unit_add_to_dbus_queue(u); | |
3441 | unit_add_to_gc_queue(u); | |
3442 | unit_add_to_load_queue(u); | |
c2756a68 | 3443 | |
3f5e8115 | 3444 | return 0; |
c2756a68 LP |
3445 | } |
3446 | ||
cd2086fe LP |
3447 | int unit_kill_context( |
3448 | Unit *u, | |
3449 | KillContext *c, | |
db2cb23b | 3450 | KillOperation k, |
cd2086fe LP |
3451 | pid_t main_pid, |
3452 | pid_t control_pid, | |
3453 | bool main_pid_alien) { | |
3454 | ||
b821a397 LP |
3455 | bool wait_for_exit = false; |
3456 | int sig, r; | |
cd2086fe LP |
3457 | |
3458 | assert(u); | |
3459 | assert(c); | |
3460 | ||
3461 | if (c->kill_mode == KILL_NONE) | |
3462 | return 0; | |
3463 | ||
db2cb23b UTL |
3464 | switch (k) { |
3465 | case KILL_KILL: | |
3466 | sig = SIGKILL; | |
3467 | break; | |
3468 | case KILL_ABORT: | |
3469 | sig = SIGABRT; | |
3470 | break; | |
3471 | case KILL_TERMINATE: | |
3472 | sig = c->kill_signal; | |
3473 | break; | |
3474 | default: | |
3475 | assert_not_reached("KillOperation unknown"); | |
3476 | } | |
cd2086fe LP |
3477 | |
3478 | if (main_pid > 0) { | |
3479 | r = kill_and_sigcont(main_pid, sig); | |
3480 | ||
3481 | if (r < 0 && r != -ESRCH) { | |
3482 | _cleanup_free_ char *comm = NULL; | |
3483 | get_process_comm(main_pid, &comm); | |
3484 | ||
b821a397 | 3485 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 3486 | } else { |
bc6aed7b LP |
3487 | if (!main_pid_alien) |
3488 | wait_for_exit = true; | |
82659fd7 | 3489 | |
d0667321 LP |
3490 | if (c->send_sighup && k == KILL_TERMINATE) |
3491 | (void) kill(main_pid, SIGHUP); | |
82659fd7 | 3492 | } |
cd2086fe LP |
3493 | } |
3494 | ||
3495 | if (control_pid > 0) { | |
3496 | r = kill_and_sigcont(control_pid, sig); | |
3497 | ||
3498 | if (r < 0 && r != -ESRCH) { | |
3499 | _cleanup_free_ char *comm = NULL; | |
3500 | get_process_comm(control_pid, &comm); | |
3501 | ||
b821a397 | 3502 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 3503 | } else { |
cd2086fe | 3504 | wait_for_exit = true; |
82659fd7 | 3505 | |
d0667321 LP |
3506 | if (c->send_sighup && k == KILL_TERMINATE) |
3507 | (void) kill(control_pid, SIGHUP); | |
82659fd7 | 3508 | } |
cd2086fe LP |
3509 | } |
3510 | ||
b821a397 LP |
3511 | if (u->cgroup_path && |
3512 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
3513 | _cleanup_set_free_ Set *pid_set = NULL; |
3514 | ||
82659fd7 LP |
3515 | /* Exclude the main/control pids from being killed via the cgroup */ |
3516 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
3517 | if (!pid_set) |
3518 | return -ENOMEM; | |
3519 | ||
d0667321 | 3520 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, k != KILL_TERMINATE, false, pid_set); |
cd2086fe LP |
3521 | if (r < 0) { |
3522 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
b821a397 LP |
3523 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
3524 | ||
82659fd7 | 3525 | } else if (r > 0) { |
bc6aed7b | 3526 | |
efdb0237 LP |
3527 | /* FIXME: For now, on the legacy hierarchy, we |
3528 | * will not wait for the cgroup members to die | |
3529 | * if we are running in a container or if this | |
3530 | * is a delegation unit, simply because cgroup | |
3531 | * notification is unreliable in these | |
3532 | * cases. It doesn't work at all in | |
3533 | * containers, and outside of containers it | |
3534 | * can be confused easily by left-over | |
3535 | * directories in the cgroup -- which however | |
3536 | * should not exist in non-delegated units. On | |
3537 | * the unified hierarchy that's different, | |
3538 | * there we get proper events. Hence rely on | |
3539 | * them.*/ | |
3540 | ||
3541 | if (cg_unified() > 0 || | |
75f86906 | 3542 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 3543 | wait_for_exit = true; |
58ea275a | 3544 | |
db2cb23b | 3545 | if (c->send_sighup && k != KILL_KILL) { |
82659fd7 LP |
3546 | set_free(pid_set); |
3547 | ||
3548 | pid_set = unit_pid_set(main_pid, control_pid); | |
3549 | if (!pid_set) | |
3550 | return -ENOMEM; | |
3551 | ||
8190da36 | 3552 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, false, true, false, pid_set); |
82659fd7 LP |
3553 | } |
3554 | } | |
cd2086fe LP |
3555 | } |
3556 | ||
3557 | return wait_for_exit; | |
3558 | } | |
3559 | ||
a57f7e2c LP |
3560 | int unit_require_mounts_for(Unit *u, const char *path) { |
3561 | char prefix[strlen(path) + 1], *p; | |
3562 | int r; | |
3563 | ||
3564 | assert(u); | |
3565 | assert(path); | |
3566 | ||
3567 | /* Registers a unit for requiring a certain path and all its | |
3568 | * prefixes. We keep a simple array of these paths in the | |
3569 | * unit, since its usually short. However, we build a prefix | |
3570 | * table for all possible prefixes so that new appearing mount | |
3571 | * units can easily determine which units to make themselves a | |
3572 | * dependency of. */ | |
3573 | ||
70b64bd3 ZJS |
3574 | if (!path_is_absolute(path)) |
3575 | return -EINVAL; | |
3576 | ||
a57f7e2c LP |
3577 | p = strdup(path); |
3578 | if (!p) | |
3579 | return -ENOMEM; | |
3580 | ||
3581 | path_kill_slashes(p); | |
3582 | ||
a57f7e2c LP |
3583 | if (!path_is_safe(p)) { |
3584 | free(p); | |
3585 | return -EPERM; | |
3586 | } | |
3587 | ||
3588 | if (strv_contains(u->requires_mounts_for, p)) { | |
3589 | free(p); | |
3590 | return 0; | |
3591 | } | |
3592 | ||
6e18964d ZJS |
3593 | r = strv_consume(&u->requires_mounts_for, p); |
3594 | if (r < 0) | |
a57f7e2c | 3595 | return r; |
a57f7e2c LP |
3596 | |
3597 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
3598 | Set *x; | |
3599 | ||
3600 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
3601 | if (!x) { | |
3602 | char *q; | |
3603 | ||
742f41ad LP |
3604 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &string_hash_ops); |
3605 | if (r < 0) | |
3606 | return r; | |
a57f7e2c LP |
3607 | |
3608 | q = strdup(prefix); | |
3609 | if (!q) | |
3610 | return -ENOMEM; | |
3611 | ||
d5099efc | 3612 | x = set_new(NULL); |
a57f7e2c LP |
3613 | if (!x) { |
3614 | free(q); | |
3615 | return -ENOMEM; | |
3616 | } | |
3617 | ||
3618 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
3619 | if (r < 0) { | |
3620 | free(q); | |
3621 | set_free(x); | |
3622 | return r; | |
3623 | } | |
3624 | } | |
3625 | ||
3626 | r = set_put(x, u); | |
3627 | if (r < 0) | |
3628 | return r; | |
3629 | } | |
3630 | ||
3631 | return 0; | |
3632 | } | |
3633 | ||
613b411c LP |
3634 | int unit_setup_exec_runtime(Unit *u) { |
3635 | ExecRuntime **rt; | |
3636 | size_t offset; | |
3637 | Iterator i; | |
3638 | Unit *other; | |
3639 | ||
3640 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3641 | assert(offset > 0); | |
3642 | ||
06b643e7 | 3643 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
3644 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
3645 | if (*rt) | |
3646 | return 0; | |
3647 | ||
3648 | /* Try to get it from somebody else */ | |
3649 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
3650 | ||
3651 | *rt = unit_get_exec_runtime(other); | |
3652 | if (*rt) { | |
3653 | exec_runtime_ref(*rt); | |
3654 | return 0; | |
3655 | } | |
3656 | } | |
3657 | ||
3658 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
3659 | } | |
3660 | ||
1c2e9646 LP |
3661 | bool unit_type_supported(UnitType t) { |
3662 | if (_unlikely_(t < 0)) | |
3663 | return false; | |
3664 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
3665 | return false; | |
3666 | ||
3667 | if (!unit_vtable[t]->supported) | |
3668 | return true; | |
3669 | ||
3670 | return unit_vtable[t]->supported(); | |
3671 | } | |
3672 | ||
8b4305c7 LP |
3673 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
3674 | int r; | |
3675 | ||
3676 | assert(u); | |
3677 | assert(where); | |
3678 | ||
3679 | r = dir_is_empty(where); | |
3680 | if (r > 0) | |
3681 | return; | |
3682 | if (r < 0) { | |
3683 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
3684 | return; | |
3685 | } | |
3686 | ||
3687 | log_struct(LOG_NOTICE, | |
3688 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3689 | LOG_UNIT_ID(u), | |
3690 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
3691 | "WHERE=%s", where, | |
3692 | NULL); | |
3693 | } | |
3694 | ||
3695 | int unit_fail_if_symlink(Unit *u, const char* where) { | |
3696 | int r; | |
3697 | ||
3698 | assert(u); | |
3699 | assert(where); | |
3700 | ||
3701 | r = is_symlink(where); | |
3702 | if (r < 0) { | |
3703 | log_unit_debug_errno(u, r, "Failed to check symlink %s, ignoring: %m", where); | |
3704 | return 0; | |
3705 | } | |
3706 | if (r == 0) | |
3707 | return 0; | |
3708 | ||
3709 | log_struct(LOG_ERR, | |
3710 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3711 | LOG_UNIT_ID(u), | |
3712 | LOG_UNIT_MESSAGE(u, "Mount on symlink %s not allowed.", where), | |
3713 | "WHERE=%s", where, | |
3714 | NULL); | |
3715 | ||
3716 | return -ELOOP; | |
3717 | } | |
0f13f3bd LP |
3718 | |
3719 | bool unit_is_pristine(Unit *u) { | |
3720 | assert(u); | |
3721 | ||
7c65093a | 3722 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
3723 | * in a number of different ways. Note that to cater for unit |
3724 | * types such as slice, we are generally fine with units that | |
3725 | * are marked UNIT_LOADED even even though nothing was | |
3726 | * actually loaded, as those unit types don't require a file | |
3727 | * on disk to validly load. */ | |
3728 | ||
3729 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
3730 | u->fragment_path || | |
3731 | u->source_path || | |
3732 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
3733 | u->job || |
3734 | u->merged_into); | |
3735 | } |