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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
87f0e418 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
87f0e418 LP |
22 | #include <errno.h> |
23 | #include <string.h> | |
0301abf4 LP |
24 | #include <stdlib.h> |
25 | #include <unistd.h> | |
45fb0699 | 26 | #include <sys/stat.h> |
87f0e418 | 27 | |
718db961 LP |
28 | #include "sd-id128.h" |
29 | #include "sd-messages.h" | |
87f0e418 | 30 | #include "set.h" |
87f0e418 LP |
31 | #include "macro.h" |
32 | #include "strv.h" | |
9eb977db | 33 | #include "path-util.h" |
87f0e418 | 34 | #include "log.h" |
c6c18be3 | 35 | #include "cgroup-util.h" |
4927fcae | 36 | #include "missing.h" |
71645aca | 37 | #include "mkdir.h" |
a5c32cff | 38 | #include "fileio-label.h" |
6482f626 | 39 | #include "formats-util.h" |
0b452006 | 40 | #include "process-util.h" |
e9db43d5 LP |
41 | #include "virt.h" |
42 | #include "bus-common-errors.h" | |
bbc29086 | 43 | #include "bus-util.h" |
e9db43d5 LP |
44 | #include "dropin.h" |
45 | #include "unit-name.h" | |
46 | #include "special.h" | |
47 | #include "unit.h" | |
48 | #include "load-fragment.h" | |
49 | #include "load-dropin.h" | |
50 | #include "dbus.h" | |
51 | #include "dbus-unit.h" | |
52 | #include "execute.h" | |
87f0e418 LP |
53 | |
54 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
55 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 | 56 | [UNIT_SOCKET] = &socket_vtable, |
e821075a | 57 | [UNIT_BUSNAME] = &busname_vtable, |
87f0e418 | 58 | [UNIT_TARGET] = &target_vtable, |
e821075a | 59 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
87f0e418 LP |
60 | [UNIT_DEVICE] = &device_vtable, |
61 | [UNIT_MOUNT] = &mount_vtable, | |
62 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 63 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 64 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 65 | [UNIT_PATH] = &path_vtable, |
6c12b52e LP |
66 | [UNIT_SLICE] = &slice_vtable, |
67 | [UNIT_SCOPE] = &scope_vtable | |
87f0e418 LP |
68 | }; |
69 | ||
f2341e0a | 70 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 71 | |
7d17cfbc | 72 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
73 | Unit *u; |
74 | ||
75 | assert(m); | |
ac155bb8 | 76 | assert(size >= sizeof(Unit)); |
87f0e418 | 77 | |
7d17cfbc MS |
78 | u = malloc0(size); |
79 | if (!u) | |
87f0e418 LP |
80 | return NULL; |
81 | ||
d5099efc | 82 | u->names = set_new(&string_hash_ops); |
ac155bb8 | 83 | if (!u->names) { |
87f0e418 LP |
84 | free(u); |
85 | return NULL; | |
86 | } | |
87 | ||
ac155bb8 MS |
88 | u->manager = m; |
89 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
90 | u->default_dependencies = true; |
91 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 92 | u->unit_file_preset = -1; |
d420282b | 93 | u->on_failure_job_mode = JOB_REPLACE; |
87f0e418 | 94 | |
67bfdc97 | 95 | RATELIMIT_INIT(u->auto_stop_ratelimit, 10 * USEC_PER_SEC, 16); |
bea355da | 96 | |
87f0e418 LP |
97 | return u; |
98 | } | |
99 | ||
f278026d LP |
100 | bool unit_has_name(Unit *u, const char *name) { |
101 | assert(u); | |
102 | assert(name); | |
103 | ||
ac155bb8 | 104 | return !!set_get(u->names, (char*) name); |
f278026d LP |
105 | } |
106 | ||
598459ce LP |
107 | static void unit_init(Unit *u) { |
108 | CGroupContext *cc; | |
109 | ExecContext *ec; | |
110 | KillContext *kc; | |
111 | ||
112 | assert(u); | |
113 | assert(u->manager); | |
114 | assert(u->type >= 0); | |
115 | ||
116 | cc = unit_get_cgroup_context(u); | |
117 | if (cc) { | |
118 | cgroup_context_init(cc); | |
119 | ||
120 | /* Copy in the manager defaults into the cgroup | |
121 | * context, _before_ the rest of the settings have | |
122 | * been initialized */ | |
123 | ||
124 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
125 | cc->blockio_accounting = u->manager->default_blockio_accounting; | |
126 | cc->memory_accounting = u->manager->default_memory_accounting; | |
127 | } | |
128 | ||
129 | ec = unit_get_exec_context(u); | |
130 | if (ec) | |
131 | exec_context_init(ec); | |
132 | ||
133 | kc = unit_get_kill_context(u); | |
134 | if (kc) | |
135 | kill_context_init(kc); | |
136 | ||
137 | if (UNIT_VTABLE(u)->init) | |
138 | UNIT_VTABLE(u)->init(u); | |
139 | } | |
140 | ||
87f0e418 | 141 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 142 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 143 | UnitType t; |
87f0e418 LP |
144 | int r; |
145 | ||
146 | assert(u); | |
147 | assert(text); | |
148 | ||
7410616c | 149 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 150 | |
ac155bb8 | 151 | if (!u->instance) |
9e2f7c11 | 152 | return -EINVAL; |
87f0e418 | 153 | |
7410616c LP |
154 | r = unit_name_replace_instance(text, u->instance, &s); |
155 | if (r < 0) | |
156 | return r; | |
157 | } else { | |
9e2f7c11 | 158 | s = strdup(text); |
7410616c LP |
159 | if (!s) |
160 | return -ENOMEM; | |
161 | } | |
87f0e418 | 162 | |
7410616c LP |
163 | if (set_contains(u->names, s)) |
164 | return 0; | |
165 | if (hashmap_contains(u->manager->units, s)) | |
166 | return -EEXIST; | |
167 | ||
168 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 169 | return -EINVAL; |
e537352b | 170 | |
7410616c LP |
171 | t = unit_name_to_type(s); |
172 | if (t < 0) | |
173 | return -EINVAL; | |
87f0e418 | 174 | |
598459ce LP |
175 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
176 | return -EINVAL; | |
87f0e418 | 177 | |
e48614c4 ZJS |
178 | r = unit_name_to_instance(s, &i); |
179 | if (r < 0) | |
598459ce | 180 | return r; |
87f0e418 | 181 | |
598459ce LP |
182 | if (i && unit_vtable[t]->no_instances) |
183 | return -EINVAL; | |
9e2f7c11 | 184 | |
276c3e78 | 185 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
186 | * but not both. Note that we do allow names with different |
187 | * instance names however! */ | |
598459ce LP |
188 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
189 | return -EINVAL; | |
9e2f7c11 | 190 | |
7410616c | 191 | if (unit_vtable[t]->no_alias && !set_isempty(u->names)) |
598459ce | 192 | return -EEXIST; |
9e2f7c11 | 193 | |
598459ce LP |
194 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
195 | return -E2BIG; | |
4f0f902f | 196 | |
e48614c4 | 197 | r = set_put(u->names, s); |
7410616c | 198 | if (r < 0) |
598459ce | 199 | return r; |
7410616c | 200 | assert(r > 0); |
87f0e418 | 201 | |
e48614c4 ZJS |
202 | r = hashmap_put(u->manager->units, s, u); |
203 | if (r < 0) { | |
7410616c | 204 | (void) set_remove(u->names, s); |
598459ce | 205 | return r; |
87f0e418 LP |
206 | } |
207 | ||
ac155bb8 | 208 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
209 | u->type = t; |
210 | u->id = s; | |
211 | u->instance = i; | |
9e2f7c11 | 212 | |
71fda00f | 213 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 214 | |
598459ce | 215 | unit_init(u); |
87f0e418 | 216 | |
598459ce LP |
217 | i = NULL; |
218 | } | |
9e2f7c11 | 219 | |
598459ce | 220 | s = NULL; |
9e2f7c11 | 221 | |
598459ce LP |
222 | unit_add_to_dbus_queue(u); |
223 | return 0; | |
87f0e418 LP |
224 | } |
225 | ||
0ae97ec1 | 226 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 227 | _cleanup_free_ char *t = NULL; |
598459ce | 228 | char *s, *i; |
276c3e78 | 229 | int r; |
0ae97ec1 LP |
230 | |
231 | assert(u); | |
232 | assert(name); | |
233 | ||
7410616c | 234 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 235 | |
ac155bb8 | 236 | if (!u->instance) |
9e2f7c11 LP |
237 | return -EINVAL; |
238 | ||
7410616c LP |
239 | r = unit_name_replace_instance(name, u->instance, &t); |
240 | if (r < 0) | |
241 | return r; | |
9e2f7c11 LP |
242 | |
243 | name = t; | |
244 | } | |
245 | ||
0ae97ec1 | 246 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 247 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 248 | if (!s) |
0ae97ec1 LP |
249 | return -ENOENT; |
250 | ||
7410616c | 251 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
252 | r = unit_name_to_instance(s, &i); |
253 | if (r < 0) | |
276c3e78 LP |
254 | return r; |
255 | ||
ac155bb8 | 256 | u->id = s; |
276c3e78 | 257 | |
ac155bb8 MS |
258 | free(u->instance); |
259 | u->instance = i; | |
276c3e78 | 260 | |
c1e1601e | 261 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 262 | |
0ae97ec1 LP |
263 | return 0; |
264 | } | |
265 | ||
f50e0a01 LP |
266 | int unit_set_description(Unit *u, const char *description) { |
267 | char *s; | |
268 | ||
269 | assert(u); | |
270 | ||
8aec412f LP |
271 | if (isempty(description)) |
272 | s = NULL; | |
273 | else { | |
274 | s = strdup(description); | |
275 | if (!s) | |
276 | return -ENOMEM; | |
277 | } | |
f50e0a01 | 278 | |
ac155bb8 MS |
279 | free(u->description); |
280 | u->description = s; | |
c1e1601e LP |
281 | |
282 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
283 | return 0; |
284 | } | |
285 | ||
701cc384 | 286 | bool unit_check_gc(Unit *u) { |
a354329f | 287 | UnitActiveState state; |
701cc384 LP |
288 | assert(u); |
289 | ||
a354329f | 290 | if (u->job) |
701cc384 LP |
291 | return true; |
292 | ||
a354329f | 293 | if (u->nop_job) |
6c073082 LP |
294 | return true; |
295 | ||
a354329f LP |
296 | state = unit_active_state(u); |
297 | ||
298 | /* If the unit is inactive and failed and no job is queued for | |
299 | * it, then release its runtime resources */ | |
300 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && | |
301 | UNIT_VTABLE(u)->release_resources) | |
302 | UNIT_VTABLE(u)->release_resources(u); | |
303 | ||
304 | /* But we keep the unit object around for longer when it is | |
305 | * referenced or configured to not be gc'ed */ | |
306 | if (state != UNIT_INACTIVE) | |
701cc384 LP |
307 | return true; |
308 | ||
a354329f | 309 | if (UNIT_VTABLE(u)->no_gc) |
e0209d83 MS |
310 | return true; |
311 | ||
a354329f | 312 | if (u->no_gc) |
701cc384 LP |
313 | return true; |
314 | ||
9d576438 LP |
315 | if (u->refs) |
316 | return true; | |
317 | ||
701cc384 LP |
318 | if (UNIT_VTABLE(u)->check_gc) |
319 | if (UNIT_VTABLE(u)->check_gc(u)) | |
320 | return true; | |
321 | ||
322 | return false; | |
323 | } | |
324 | ||
87f0e418 LP |
325 | void unit_add_to_load_queue(Unit *u) { |
326 | assert(u); | |
ac155bb8 | 327 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 328 | |
ac155bb8 | 329 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
330 | return; |
331 | ||
71fda00f | 332 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 333 | u->in_load_queue = true; |
87f0e418 LP |
334 | } |
335 | ||
23a177ef LP |
336 | void unit_add_to_cleanup_queue(Unit *u) { |
337 | assert(u); | |
338 | ||
ac155bb8 | 339 | if (u->in_cleanup_queue) |
23a177ef LP |
340 | return; |
341 | ||
71fda00f | 342 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 343 | u->in_cleanup_queue = true; |
23a177ef LP |
344 | } |
345 | ||
701cc384 LP |
346 | void unit_add_to_gc_queue(Unit *u) { |
347 | assert(u); | |
348 | ||
ac155bb8 | 349 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
350 | return; |
351 | ||
352 | if (unit_check_gc(u)) | |
353 | return; | |
354 | ||
71fda00f | 355 | LIST_PREPEND(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 356 | u->in_gc_queue = true; |
701cc384 | 357 | |
ac155bb8 | 358 | u->manager->n_in_gc_queue ++; |
701cc384 LP |
359 | } |
360 | ||
c1e1601e LP |
361 | void unit_add_to_dbus_queue(Unit *u) { |
362 | assert(u); | |
ac155bb8 | 363 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 364 | |
ac155bb8 | 365 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
366 | return; |
367 | ||
a567261a | 368 | /* Shortcut things if nobody cares */ |
8f8f05a9 LP |
369 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
370 | set_isempty(u->manager->private_buses)) { | |
ac155bb8 | 371 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
372 | return; |
373 | } | |
374 | ||
71fda00f | 375 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 376 | u->in_dbus_queue = true; |
c1e1601e LP |
377 | } |
378 | ||
87f0e418 LP |
379 | static void bidi_set_free(Unit *u, Set *s) { |
380 | Iterator i; | |
381 | Unit *other; | |
382 | ||
383 | assert(u); | |
384 | ||
385 | /* Frees the set and makes sure we are dropped from the | |
386 | * inverse pointers */ | |
387 | ||
388 | SET_FOREACH(other, s, i) { | |
389 | UnitDependency d; | |
390 | ||
391 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 392 | set_remove(other->dependencies[d], u); |
701cc384 LP |
393 | |
394 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
395 | } |
396 | ||
397 | set_free(s); | |
398 | } | |
399 | ||
c2756a68 LP |
400 | static void unit_remove_transient(Unit *u) { |
401 | char **i; | |
402 | ||
403 | assert(u); | |
404 | ||
405 | if (!u->transient) | |
406 | return; | |
407 | ||
408 | if (u->fragment_path) | |
3f5e8115 | 409 | (void) unlink(u->fragment_path); |
c2756a68 LP |
410 | |
411 | STRV_FOREACH(i, u->dropin_paths) { | |
412 | _cleanup_free_ char *p = NULL; | |
413 | int r; | |
414 | ||
3f5e8115 | 415 | (void) unlink(*i); |
c2756a68 LP |
416 | |
417 | r = path_get_parent(*i, &p); | |
418 | if (r >= 0) | |
3f5e8115 | 419 | (void) rmdir(p); |
c2756a68 LP |
420 | } |
421 | } | |
422 | ||
a57f7e2c LP |
423 | static void unit_free_requires_mounts_for(Unit *u) { |
424 | char **j; | |
425 | ||
426 | STRV_FOREACH(j, u->requires_mounts_for) { | |
427 | char s[strlen(*j) + 1]; | |
428 | ||
429 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
430 | char *y; | |
431 | Set *x; | |
432 | ||
433 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
434 | if (!x) | |
435 | continue; | |
436 | ||
437 | set_remove(x, u); | |
438 | ||
439 | if (set_isempty(x)) { | |
440 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
441 | free(y); | |
442 | set_free(x); | |
443 | } | |
444 | } | |
445 | } | |
446 | ||
447 | strv_free(u->requires_mounts_for); | |
448 | u->requires_mounts_for = NULL; | |
449 | } | |
450 | ||
598459ce LP |
451 | static void unit_done(Unit *u) { |
452 | ExecContext *ec; | |
453 | CGroupContext *cc; | |
454 | ||
455 | assert(u); | |
456 | ||
457 | if (u->type < 0) | |
458 | return; | |
459 | ||
460 | if (UNIT_VTABLE(u)->done) | |
461 | UNIT_VTABLE(u)->done(u); | |
462 | ||
463 | ec = unit_get_exec_context(u); | |
464 | if (ec) | |
465 | exec_context_done(ec); | |
466 | ||
467 | cc = unit_get_cgroup_context(u); | |
468 | if (cc) | |
469 | cgroup_context_done(cc); | |
470 | } | |
471 | ||
87f0e418 LP |
472 | void unit_free(Unit *u) { |
473 | UnitDependency d; | |
474 | Iterator i; | |
475 | char *t; | |
476 | ||
477 | assert(u); | |
478 | ||
c2756a68 LP |
479 | if (u->manager->n_reloading <= 0) |
480 | unit_remove_transient(u); | |
481 | ||
c1e1601e LP |
482 | bus_unit_send_removed_signal(u); |
483 | ||
598459ce | 484 | unit_done(u); |
a013b84b | 485 | |
cf9fd508 DM |
486 | sd_bus_slot_unref(u->match_bus_slot); |
487 | ||
a57f7e2c LP |
488 | unit_free_requires_mounts_for(u); |
489 | ||
ac155bb8 MS |
490 | SET_FOREACH(t, u->names, i) |
491 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 492 | |
97e7d748 MS |
493 | if (u->job) { |
494 | Job *j = u->job; | |
495 | job_uninstall(j); | |
496 | job_free(j); | |
497 | } | |
964e0949 | 498 | |
e0209d83 MS |
499 | if (u->nop_job) { |
500 | Job *j = u->nop_job; | |
501 | job_uninstall(j); | |
502 | job_free(j); | |
503 | } | |
504 | ||
964e0949 | 505 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 506 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 507 | |
ac155bb8 | 508 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 509 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 510 | |
ac155bb8 | 511 | if (u->in_load_queue) |
71fda00f | 512 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 513 | |
ac155bb8 | 514 | if (u->in_dbus_queue) |
71fda00f | 515 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 516 | |
ac155bb8 | 517 | if (u->in_cleanup_queue) |
71fda00f | 518 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 519 | |
ac155bb8 | 520 | if (u->in_gc_queue) { |
71fda00f | 521 | LIST_REMOVE(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 522 | u->manager->n_in_gc_queue--; |
701cc384 LP |
523 | } |
524 | ||
4ad49000 | 525 | if (u->in_cgroup_queue) |
71fda00f | 526 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
87f0e418 | 527 | |
72673e86 LP |
528 | if (u->cgroup_path) { |
529 | hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
530 | free(u->cgroup_path); | |
531 | } | |
532 | ||
03455c28 | 533 | manager_update_failed_units(u->manager, u, false); |
db785129 | 534 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 535 | |
ac155bb8 | 536 | free(u->description); |
49dbfa7b | 537 | strv_free(u->documentation); |
ac155bb8 | 538 | free(u->fragment_path); |
1b64d026 | 539 | free(u->source_path); |
ae7a7182 | 540 | strv_free(u->dropin_paths); |
ac155bb8 | 541 | free(u->instance); |
87f0e418 | 542 | |
f189ab18 LP |
543 | free(u->job_timeout_reboot_arg); |
544 | ||
ac155bb8 | 545 | set_free_free(u->names); |
87f0e418 | 546 | |
a911bb9a LP |
547 | unit_unwatch_all_pids(u); |
548 | ||
ac155bb8 | 549 | condition_free_list(u->conditions); |
59fccdc5 | 550 | condition_free_list(u->asserts); |
52661efd | 551 | |
702a2d8f LP |
552 | unit_ref_unset(&u->slice); |
553 | ||
ac155bb8 MS |
554 | while (u->refs) |
555 | unit_ref_unset(u->refs); | |
57020a3a | 556 | |
87f0e418 LP |
557 | free(u); |
558 | } | |
559 | ||
560 | UnitActiveState unit_active_state(Unit *u) { | |
561 | assert(u); | |
562 | ||
ac155bb8 | 563 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
564 | return unit_active_state(unit_follow_merge(u)); |
565 | ||
566 | /* After a reload it might happen that a unit is not correctly | |
567 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 568 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
569 | |
570 | return UNIT_VTABLE(u)->active_state(u); | |
571 | } | |
572 | ||
10a94420 LP |
573 | const char* unit_sub_state_to_string(Unit *u) { |
574 | assert(u); | |
575 | ||
576 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
577 | } | |
578 | ||
7c0b05e5 MS |
579 | static int complete_move(Set **s, Set **other) { |
580 | int r; | |
581 | ||
23a177ef LP |
582 | assert(s); |
583 | assert(other); | |
87f0e418 | 584 | |
23a177ef | 585 | if (!*other) |
7c0b05e5 | 586 | return 0; |
87f0e418 | 587 | |
7c0b05e5 MS |
588 | if (*s) { |
589 | r = set_move(*s, *other); | |
590 | if (r < 0) | |
591 | return r; | |
592 | } else { | |
23a177ef LP |
593 | *s = *other; |
594 | *other = NULL; | |
595 | } | |
7c0b05e5 MS |
596 | |
597 | return 0; | |
23a177ef | 598 | } |
87f0e418 | 599 | |
7c0b05e5 | 600 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
601 | char *t; |
602 | Iterator i; | |
7c0b05e5 | 603 | int r; |
87f0e418 | 604 | |
23a177ef LP |
605 | assert(u); |
606 | assert(other); | |
607 | ||
7c0b05e5 MS |
608 | r = complete_move(&u->names, &other->names); |
609 | if (r < 0) | |
610 | return r; | |
23a177ef | 611 | |
ac155bb8 MS |
612 | set_free_free(other->names); |
613 | other->names = NULL; | |
614 | other->id = NULL; | |
23a177ef | 615 | |
ac155bb8 MS |
616 | SET_FOREACH(t, u->names, i) |
617 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
618 | |
619 | return 0; | |
87f0e418 LP |
620 | } |
621 | ||
09a65f92 MS |
622 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
623 | unsigned n_reserve; | |
624 | ||
625 | assert(u); | |
626 | assert(other); | |
627 | assert(d < _UNIT_DEPENDENCY_MAX); | |
628 | ||
629 | /* | |
630 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 631 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
632 | * as a whole to u by complete_move(). |
633 | */ | |
634 | if (!u->dependencies[d]) | |
635 | return 0; | |
636 | ||
637 | /* merge_dependencies() will skip a u-on-u dependency */ | |
638 | n_reserve = set_size(other->dependencies[d]) - !!set_get(other->dependencies[d], u); | |
639 | ||
640 | return set_reserve(u->dependencies[d], n_reserve); | |
641 | } | |
642 | ||
d1fab3fe | 643 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
644 | Iterator i; |
645 | Unit *back; | |
87f0e418 | 646 | int r; |
23a177ef LP |
647 | |
648 | assert(u); | |
649 | assert(other); | |
650 | assert(d < _UNIT_DEPENDENCY_MAX); | |
651 | ||
83a95334 | 652 | /* Fix backwards pointers */ |
ac155bb8 | 653 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
654 | UnitDependency k; |
655 | ||
e48614c4 | 656 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff ZJS |
657 | /* Do not add dependencies between u and itself */ |
658 | if (back == u) { | |
d1fab3fe | 659 | if (set_remove(back->dependencies[k], other)) |
f2341e0a | 660 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff ZJS |
661 | } else { |
662 | r = set_remove_and_put(back->dependencies[k], other, u); | |
663 | if (r == -EEXIST) | |
664 | set_remove(back->dependencies[k], other); | |
665 | else | |
666 | assert(r >= 0 || r == -ENOENT); | |
667 | } | |
e48614c4 | 668 | } |
23a177ef LP |
669 | } |
670 | ||
e66047ff | 671 | /* Also do not move dependencies on u to itself */ |
d1fab3fe ZJS |
672 | back = set_remove(other->dependencies[d], u); |
673 | if (back) | |
f2341e0a | 674 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 675 | |
7c0b05e5 MS |
676 | /* The move cannot fail. The caller must have performed a reservation. */ |
677 | assert_se(complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); | |
23a177ef | 678 | |
ac155bb8 MS |
679 | set_free(other->dependencies[d]); |
680 | other->dependencies[d] = NULL; | |
23a177ef LP |
681 | } |
682 | ||
683 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 684 | UnitDependency d; |
d1fab3fe | 685 | const char *other_id = NULL; |
09a65f92 | 686 | int r; |
87f0e418 LP |
687 | |
688 | assert(u); | |
689 | assert(other); | |
ac155bb8 MS |
690 | assert(u->manager == other->manager); |
691 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 692 | |
cc916967 LP |
693 | other = unit_follow_merge(other); |
694 | ||
23a177ef LP |
695 | if (other == u) |
696 | return 0; | |
697 | ||
ac155bb8 | 698 | if (u->type != other->type) |
9e2f7c11 LP |
699 | return -EINVAL; |
700 | ||
ac155bb8 | 701 | if (!u->instance != !other->instance) |
87f0e418 LP |
702 | return -EINVAL; |
703 | ||
ac155bb8 | 704 | if (other->load_state != UNIT_STUB && |
c2756a68 | 705 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 706 | return -EEXIST; |
87f0e418 | 707 | |
ac155bb8 | 708 | if (other->job) |
819e213f LP |
709 | return -EEXIST; |
710 | ||
e0209d83 MS |
711 | if (other->nop_job) |
712 | return -EEXIST; | |
713 | ||
fdf20a31 | 714 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
715 | return -EEXIST; |
716 | ||
d1fab3fe ZJS |
717 | if (other->id) |
718 | other_id = strdupa(other->id); | |
719 | ||
09a65f92 MS |
720 | /* Make reservations to ensure merge_dependencies() won't fail */ |
721 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
722 | r = reserve_dependencies(u, other, d); | |
723 | /* | |
724 | * We don't rollback reservations if we fail. We don't have | |
725 | * a way to undo reservations. A reservation is not a leak. | |
726 | */ | |
727 | if (r < 0) | |
728 | return r; | |
729 | } | |
730 | ||
87f0e418 | 731 | /* Merge names */ |
7c0b05e5 MS |
732 | r = merge_names(u, other); |
733 | if (r < 0) | |
734 | return r; | |
87f0e418 | 735 | |
57020a3a | 736 | /* Redirect all references */ |
ac155bb8 MS |
737 | while (other->refs) |
738 | unit_ref_set(other->refs, u); | |
57020a3a | 739 | |
87f0e418 LP |
740 | /* Merge dependencies */ |
741 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 742 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 743 | |
ac155bb8 MS |
744 | other->load_state = UNIT_MERGED; |
745 | other->merged_into = u; | |
23a177ef | 746 | |
3616a49c LP |
747 | /* If there is still some data attached to the other node, we |
748 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 749 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
750 | if (UNIT_VTABLE(other)->done) |
751 | UNIT_VTABLE(other)->done(other); | |
752 | ||
753 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
754 | unit_add_to_cleanup_queue(other); |
755 | ||
756 | return 0; | |
757 | } | |
758 | ||
759 | int unit_merge_by_name(Unit *u, const char *name) { | |
760 | Unit *other; | |
9e2f7c11 | 761 | int r; |
68eda4bd | 762 | _cleanup_free_ char *s = NULL; |
23a177ef LP |
763 | |
764 | assert(u); | |
765 | assert(name); | |
766 | ||
7410616c | 767 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 768 | if (!u->instance) |
9e2f7c11 LP |
769 | return -EINVAL; |
770 | ||
7410616c LP |
771 | r = unit_name_replace_instance(name, u->instance, &s); |
772 | if (r < 0) | |
773 | return r; | |
9e2f7c11 LP |
774 | |
775 | name = s; | |
776 | } | |
777 | ||
c2756a68 | 778 | other = manager_get_unit(u->manager, name); |
7410616c LP |
779 | if (other) |
780 | return unit_merge(u, other); | |
23a177ef | 781 | |
7410616c | 782 | return unit_add_name(u, name); |
23a177ef LP |
783 | } |
784 | ||
785 | Unit* unit_follow_merge(Unit *u) { | |
786 | assert(u); | |
787 | ||
ac155bb8 MS |
788 | while (u->load_state == UNIT_MERGED) |
789 | assert_se(u = u->merged_into); | |
23a177ef LP |
790 | |
791 | return u; | |
792 | } | |
793 | ||
794 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
795 | int r; | |
796 | ||
797 | assert(u); | |
798 | assert(c); | |
799 | ||
36be24c8 ZJS |
800 | if (c->working_directory) { |
801 | r = unit_require_mounts_for(u, c->working_directory); | |
802 | if (r < 0) | |
803 | return r; | |
804 | } | |
805 | ||
806 | if (c->root_directory) { | |
807 | r = unit_require_mounts_for(u, c->root_directory); | |
808 | if (r < 0) | |
809 | return r; | |
810 | } | |
811 | ||
b2c23da8 | 812 | if (u->manager->running_as != MANAGER_SYSTEM) |
b46a529c LP |
813 | return 0; |
814 | ||
815 | if (c->private_tmp) { | |
816 | r = unit_require_mounts_for(u, "/tmp"); | |
817 | if (r < 0) | |
818 | return r; | |
819 | ||
820 | r = unit_require_mounts_for(u, "/var/tmp"); | |
821 | if (r < 0) | |
822 | return r; | |
823 | } | |
824 | ||
ecc6e2b8 LP |
825 | if (c->std_output != EXEC_OUTPUT_KMSG && |
826 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 827 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
828 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
829 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 830 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 831 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 832 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 833 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 834 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 835 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 836 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
837 | return 0; |
838 | ||
839 | /* If syslog or kernel logging is requested, make sure our own | |
840 | * logging daemon is run first. */ | |
841 | ||
b46a529c LP |
842 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); |
843 | if (r < 0) | |
844 | return r; | |
23a177ef | 845 | |
87f0e418 LP |
846 | return 0; |
847 | } | |
848 | ||
87f0e418 LP |
849 | const char *unit_description(Unit *u) { |
850 | assert(u); | |
851 | ||
ac155bb8 MS |
852 | if (u->description) |
853 | return u->description; | |
87f0e418 | 854 | |
ac155bb8 | 855 | return strna(u->id); |
87f0e418 LP |
856 | } |
857 | ||
858 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 859 | char *t, **j; |
87f0e418 LP |
860 | UnitDependency d; |
861 | Iterator i; | |
47be870b | 862 | const char *prefix2; |
173e3821 LP |
863 | char |
864 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
865 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
866 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
867 | timestamp4[FORMAT_TIMESTAMP_MAX], |
868 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 869 | Unit *following; |
eeaedb7c LP |
870 | _cleanup_set_free_ Set *following_set = NULL; |
871 | int r; | |
87f0e418 LP |
872 | |
873 | assert(u); | |
ac155bb8 | 874 | assert(u->type >= 0); |
87f0e418 | 875 | |
4c940960 | 876 | prefix = strempty(prefix); |
63c372cb | 877 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
878 | |
879 | fprintf(f, | |
40d50879 | 880 | "%s-> Unit %s:\n" |
87f0e418 | 881 | "%s\tDescription: %s\n" |
9e2f7c11 | 882 | "%s\tInstance: %s\n" |
87f0e418 | 883 | "%s\tUnit Load State: %s\n" |
2fad8195 | 884 | "%s\tUnit Active State: %s\n" |
173e3821 | 885 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 886 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 887 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 888 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 889 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 890 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 891 | "%s\tTransient: %s\n" |
4ad49000 LP |
892 | "%s\tSlice: %s\n" |
893 | "%s\tCGroup: %s\n" | |
894 | "%s\tCGroup realized: %s\n" | |
6414b7c9 DS |
895 | "%s\tCGroup mask: 0x%x\n" |
896 | "%s\tCGroup members mask: 0x%x\n", | |
ac155bb8 | 897 | prefix, u->id, |
87f0e418 | 898 | prefix, unit_description(u), |
ac155bb8 MS |
899 | prefix, strna(u->instance), |
900 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 901 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
902 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
903 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
904 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
905 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 906 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 907 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 908 | prefix, yes_no(u->transient), |
4ad49000 LP |
909 | prefix, strna(unit_slice_name(u)), |
910 | prefix, strna(u->cgroup_path), | |
911 | prefix, yes_no(u->cgroup_realized), | |
bc432dc7 | 912 | prefix, u->cgroup_realized_mask, |
6414b7c9 | 913 | prefix, u->cgroup_members_mask); |
0301abf4 | 914 | |
ac155bb8 | 915 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
916 | fprintf(f, "%s\tName: %s\n", prefix, t); |
917 | ||
49dbfa7b LP |
918 | STRV_FOREACH(j, u->documentation) |
919 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
920 | ||
eeaedb7c LP |
921 | following = unit_following(u); |
922 | if (following) | |
ac155bb8 | 923 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 924 | |
eeaedb7c LP |
925 | r = unit_following_set(u, &following_set); |
926 | if (r >= 0) { | |
927 | Unit *other; | |
928 | ||
929 | SET_FOREACH(other, following_set, i) | |
930 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
931 | } | |
932 | ||
ac155bb8 MS |
933 | if (u->fragment_path) |
934 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 935 | |
1b64d026 LP |
936 | if (u->source_path) |
937 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
938 | ||
ae7a7182 | 939 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 940 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 941 | |
ac155bb8 | 942 | if (u->job_timeout > 0) |
2fa4092c | 943 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 944 | |
f189ab18 LP |
945 | if (u->job_timeout_action != FAILURE_ACTION_NONE) |
946 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, failure_action_to_string(u->job_timeout_action)); | |
947 | ||
948 | if (u->job_timeout_reboot_arg) | |
949 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
950 | ||
59fccdc5 LP |
951 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
952 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 953 | |
ac155bb8 | 954 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
955 | fprintf(f, |
956 | "%s\tCondition Timestamp: %s\n" | |
957 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
958 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
959 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 960 | |
59fccdc5 LP |
961 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
962 | fprintf(f, | |
963 | "%s\tAssert Timestamp: %s\n" | |
964 | "%s\tAssert Result: %s\n", | |
965 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
966 | prefix, yes_no(u->assert_result)); | |
967 | ||
87f0e418 LP |
968 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
969 | Unit *other; | |
970 | ||
ac155bb8 MS |
971 | SET_FOREACH(other, u->dependencies[d], i) |
972 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
973 | } |
974 | ||
7c8fa05c | 975 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
976 | fprintf(f, |
977 | "%s\tRequiresMountsFor:", prefix); | |
978 | ||
979 | STRV_FOREACH(j, u->requires_mounts_for) | |
980 | fprintf(f, " %s", *j); | |
981 | ||
982 | fputs("\n", f); | |
983 | } | |
984 | ||
ac155bb8 | 985 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 986 | |
b0650475 | 987 | fprintf(f, |
a40eb732 | 988 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
989 | "%s\tRefuseManualStart: %s\n" |
990 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 991 | "%s\tDefaultDependencies: %s\n" |
d420282b | 992 | "%s\tOnFailureJobMode: %s\n" |
7a6000a6 LP |
993 | "%s\tIgnoreOnIsolate: %s\n" |
994 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
995 | prefix, yes_no(u->stop_when_unneeded), |
996 | prefix, yes_no(u->refuse_manual_start), | |
997 | prefix, yes_no(u->refuse_manual_stop), | |
998 | prefix, yes_no(u->default_dependencies), | |
d420282b | 999 | prefix, job_mode_to_string(u->on_failure_job_mode), |
ac155bb8 MS |
1000 | prefix, yes_no(u->ignore_on_isolate), |
1001 | prefix, yes_no(u->ignore_on_snapshot)); | |
1002 | ||
23a177ef LP |
1003 | if (UNIT_VTABLE(u)->dump) |
1004 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1005 | |
ac155bb8 | 1006 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1007 | fprintf(f, |
1008 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1009 | prefix, u->merged_into->id); |
1010 | else if (u->load_state == UNIT_ERROR) | |
1011 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 1012 | |
87f0e418 | 1013 | |
ac155bb8 MS |
1014 | if (u->job) |
1015 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1016 | |
e0209d83 MS |
1017 | if (u->nop_job) |
1018 | job_dump(u->nop_job, f, prefix2); | |
1019 | ||
87f0e418 LP |
1020 | } |
1021 | ||
1022 | /* Common implementation for multiple backends */ | |
e537352b | 1023 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1024 | int r; |
1025 | ||
1026 | assert(u); | |
23a177ef | 1027 | |
e48614c4 | 1028 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1029 | r = unit_load_fragment(u); |
1030 | if (r < 0) | |
23a177ef LP |
1031 | return r; |
1032 | ||
ac155bb8 | 1033 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1034 | return -ENOENT; |
1035 | ||
1036 | /* Load drop-in directory data */ | |
4ad49000 LP |
1037 | r = unit_load_dropin(unit_follow_merge(u)); |
1038 | if (r < 0) | |
23a177ef LP |
1039 | return r; |
1040 | ||
1041 | return 0; | |
1042 | } | |
1043 | ||
1044 | /* Common implementation for multiple backends */ | |
e537352b | 1045 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1046 | int r; |
87f0e418 LP |
1047 | |
1048 | assert(u); | |
1049 | ||
23a177ef LP |
1050 | /* Same as unit_load_fragment_and_dropin(), but whether |
1051 | * something can be loaded or not doesn't matter. */ | |
1052 | ||
1053 | /* Load a .service file */ | |
4ad49000 LP |
1054 | r = unit_load_fragment(u); |
1055 | if (r < 0) | |
87f0e418 LP |
1056 | return r; |
1057 | ||
ac155bb8 MS |
1058 | if (u->load_state == UNIT_STUB) |
1059 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1060 | |
87f0e418 | 1061 | /* Load drop-in directory data */ |
4ad49000 LP |
1062 | r = unit_load_dropin(unit_follow_merge(u)); |
1063 | if (r < 0) | |
87f0e418 LP |
1064 | return r; |
1065 | ||
23a177ef | 1066 | return 0; |
87f0e418 LP |
1067 | } |
1068 | ||
bba34eed | 1069 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1070 | assert(u); |
1071 | assert(target); | |
1072 | ||
ac155bb8 | 1073 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1074 | return 0; |
1075 | ||
35b8ca3a | 1076 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1077 | * that loop check below is reliable */ |
ac155bb8 MS |
1078 | if (u->load_state != UNIT_LOADED || |
1079 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1080 | return 0; |
1081 | ||
21256a2b LP |
1082 | /* If either side wants no automatic dependencies, then let's |
1083 | * skip this */ | |
ac155bb8 MS |
1084 | if (!u->default_dependencies || |
1085 | !target->default_dependencies) | |
21256a2b LP |
1086 | return 0; |
1087 | ||
98bc2000 | 1088 | /* Don't create loops */ |
ac155bb8 | 1089 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1090 | return 0; |
1091 | ||
1092 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
1093 | } | |
1094 | ||
e954c9cf | 1095 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 1096 | |
21256a2b LP |
1097 | static const UnitDependency deps[] = { |
1098 | UNIT_REQUIRED_BY, | |
1099 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
be7d9ff7 LP |
1100 | UNIT_REQUISITE_OF, |
1101 | UNIT_REQUISITE_OF_OVERRIDABLE, | |
21256a2b LP |
1102 | UNIT_WANTED_BY, |
1103 | UNIT_BOUND_BY | |
1104 | }; | |
1105 | ||
bba34eed | 1106 | Unit *target; |
98bc2000 | 1107 | Iterator i; |
21256a2b | 1108 | unsigned k; |
db57f3c6 | 1109 | int r = 0; |
98bc2000 LP |
1110 | |
1111 | assert(u); | |
1112 | ||
21256a2b | 1113 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
1114 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
1115 | r = unit_add_default_target_dependency(u, target); | |
1116 | if (r < 0) | |
21256a2b | 1117 | return r; |
a016b922 LP |
1118 | } |
1119 | ||
e954c9cf LP |
1120 | return r; |
1121 | } | |
4ad49000 | 1122 | |
e954c9cf LP |
1123 | static int unit_add_slice_dependencies(Unit *u) { |
1124 | assert(u); | |
b81884e7 | 1125 | |
35b7ff80 | 1126 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1127 | return 0; |
1128 | ||
1129 | if (UNIT_ISSET(u->slice)) | |
1130 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true); | |
1131 | ||
d1fab3fe ZJS |
1132 | if (streq(u->id, SPECIAL_ROOT_SLICE)) |
1133 | return 0; | |
1134 | ||
e954c9cf | 1135 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true); |
98bc2000 LP |
1136 | } |
1137 | ||
e954c9cf | 1138 | static int unit_add_mount_dependencies(Unit *u) { |
9588bc32 LP |
1139 | char **i; |
1140 | int r; | |
1141 | ||
1142 | assert(u); | |
1143 | ||
1144 | STRV_FOREACH(i, u->requires_mounts_for) { | |
1145 | char prefix[strlen(*i) + 1]; | |
1146 | ||
1147 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
1148 | Unit *m; | |
1149 | ||
1150 | r = manager_get_unit_by_path(u->manager, prefix, ".mount", &m); | |
1151 | if (r < 0) | |
1152 | return r; | |
1153 | if (r == 0) | |
1154 | continue; | |
1155 | if (m == u) | |
1156 | continue; | |
1157 | ||
1158 | if (m->load_state != UNIT_LOADED) | |
1159 | continue; | |
1160 | ||
1161 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1162 | if (r < 0) | |
1163 | return r; | |
1164 | ||
1165 | if (m->fragment_path) { | |
1166 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1167 | if (r < 0) | |
1168 | return r; | |
1169 | } | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | return 0; | |
1174 | } | |
1175 | ||
95ae05c0 WC |
1176 | static int unit_add_startup_units(Unit *u) { |
1177 | CGroupContext *c; | |
95ae05c0 WC |
1178 | |
1179 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1180 | if (!c) |
1181 | return 0; | |
1182 | ||
1183 | if (c->startup_cpu_shares == (unsigned long) -1 && | |
1184 | c->startup_blockio_weight == (unsigned long) -1) | |
1185 | return 0; | |
1186 | ||
756c09e6 | 1187 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1188 | } |
1189 | ||
87f0e418 LP |
1190 | int unit_load(Unit *u) { |
1191 | int r; | |
1192 | ||
1193 | assert(u); | |
1194 | ||
ac155bb8 | 1195 | if (u->in_load_queue) { |
71fda00f | 1196 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1197 | u->in_load_queue = false; |
87f0e418 LP |
1198 | } |
1199 | ||
ac155bb8 | 1200 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1201 | return -EINVAL; |
1202 | ||
ac155bb8 | 1203 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1204 | return 0; |
1205 | ||
c2756a68 LP |
1206 | if (UNIT_VTABLE(u)->load) { |
1207 | r = UNIT_VTABLE(u)->load(u); | |
1208 | if (r < 0) | |
87f0e418 | 1209 | goto fail; |
c2756a68 | 1210 | } |
23a177ef | 1211 | |
ac155bb8 | 1212 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1213 | r = -ENOENT; |
1214 | goto fail; | |
1215 | } | |
1216 | ||
7c8fa05c | 1217 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1218 | |
e954c9cf LP |
1219 | r = unit_add_target_dependencies(u); |
1220 | if (r < 0) | |
1221 | goto fail; | |
1222 | ||
1223 | r = unit_add_slice_dependencies(u); | |
1224 | if (r < 0) | |
1225 | goto fail; | |
c2756a68 | 1226 | |
e954c9cf | 1227 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1228 | if (r < 0) |
c2756a68 | 1229 | goto fail; |
7c8fa05c | 1230 | |
95ae05c0 WC |
1231 | r = unit_add_startup_units(u); |
1232 | if (r < 0) | |
1233 | goto fail; | |
1234 | ||
bc432dc7 | 1235 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1236 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
c2756a68 LP |
1237 | r = -EINVAL; |
1238 | goto fail; | |
1239 | } | |
bc432dc7 LP |
1240 | |
1241 | unit_update_cgroup_members_masks(u); | |
f68319bb LP |
1242 | } |
1243 | ||
ac155bb8 | 1244 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1245 | |
1246 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1247 | unit_add_to_gc_queue(u); |
87f0e418 | 1248 | |
87f0e418 LP |
1249 | return 0; |
1250 | ||
1251 | fail: | |
c2756a68 | 1252 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1253 | u->load_error = r; |
c1e1601e | 1254 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1255 | unit_add_to_gc_queue(u); |
23a177ef | 1256 | |
f2341e0a | 1257 | log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
23a177ef | 1258 | |
87f0e418 LP |
1259 | return r; |
1260 | } | |
1261 | ||
49365733 LP |
1262 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1263 | Condition *c; | |
1264 | int triggered = -1; | |
1265 | ||
1266 | assert(u); | |
1267 | assert(to_string); | |
1268 | ||
1269 | /* If the condition list is empty, then it is true */ | |
1270 | if (!first) | |
1271 | return true; | |
1272 | ||
1273 | /* Otherwise, if all of the non-trigger conditions apply and | |
1274 | * if any of the trigger conditions apply (unless there are | |
1275 | * none) we return true */ | |
1276 | LIST_FOREACH(conditions, c, first) { | |
1277 | int r; | |
1278 | ||
1279 | r = condition_test(c); | |
1280 | if (r < 0) | |
f2341e0a LP |
1281 | log_unit_warning(u, |
1282 | "Couldn't determine result for %s=%s%s%s, assuming failed: %m", | |
49365733 LP |
1283 | to_string(c->type), |
1284 | c->trigger ? "|" : "", | |
1285 | c->negate ? "!" : "", | |
f2341e0a | 1286 | c->parameter); |
49365733 | 1287 | else |
f2341e0a LP |
1288 | log_unit_debug(u, |
1289 | "%s=%s%s%s %s.", | |
49365733 LP |
1290 | to_string(c->type), |
1291 | c->trigger ? "|" : "", | |
1292 | c->negate ? "!" : "", | |
1293 | c->parameter, | |
f2341e0a | 1294 | condition_result_to_string(c->result)); |
49365733 LP |
1295 | |
1296 | if (!c->trigger && r <= 0) | |
1297 | return false; | |
1298 | ||
1299 | if (c->trigger && triggered <= 0) | |
1300 | triggered = r > 0; | |
1301 | } | |
1302 | ||
1303 | return triggered != 0; | |
1304 | } | |
1305 | ||
9588bc32 | 1306 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1307 | assert(u); |
1308 | ||
ac155bb8 | 1309 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1310 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1311 | |
ac155bb8 | 1312 | return u->condition_result; |
90bbc946 LP |
1313 | } |
1314 | ||
59fccdc5 LP |
1315 | static bool unit_assert_test(Unit *u) { |
1316 | assert(u); | |
1317 | ||
1318 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1319 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1320 | |
1321 | return u->assert_result; | |
1322 | } | |
1323 | ||
44a6b1b6 | 1324 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
877d54e9 | 1325 | const char *format; |
a85ca902 | 1326 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1327 | |
1328 | assert(u); | |
b5bf308b | 1329 | assert(t == JOB_START || t == JOB_STOP || t == JOB_RELOAD); |
877d54e9 | 1330 | |
b5bf308b | 1331 | if (t != JOB_RELOAD) { |
a85ca902 MS |
1332 | format_table = &UNIT_VTABLE(u)->status_message_formats; |
1333 | if (format_table) { | |
1334 | format = format_table->starting_stopping[t == JOB_STOP]; | |
1335 | if (format) | |
1336 | return format; | |
1337 | } | |
1338 | } | |
877d54e9 LP |
1339 | |
1340 | /* Return generic strings */ | |
1341 | if (t == JOB_START) | |
1342 | return "Starting %s."; | |
1343 | else if (t == JOB_STOP) | |
1344 | return "Stopping %s."; | |
b5bf308b | 1345 | else |
877d54e9 | 1346 | return "Reloading %s."; |
877d54e9 LP |
1347 | } |
1348 | ||
1349 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1350 | const char *format; | |
1351 | ||
1352 | assert(u); | |
1353 | ||
877d54e9 | 1354 | format = unit_get_status_message_format(u, t); |
c6918296 | 1355 | |
bcfce235 | 1356 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1357 | unit_status_printf(u, "", format); |
bcfce235 | 1358 | REENABLE_WARNING; |
c6918296 MS |
1359 | } |
1360 | ||
877d54e9 LP |
1361 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
1362 | const char *format; | |
1363 | char buf[LINE_MAX]; | |
1364 | sd_id128_t mid; | |
1365 | ||
1366 | assert(u); | |
1367 | ||
1368 | if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD) | |
1369 | return; | |
1370 | ||
81270860 LP |
1371 | if (log_on_console()) |
1372 | return; | |
1373 | ||
877d54e9 LP |
1374 | /* We log status messages for all units and all operations. */ |
1375 | ||
a85ca902 | 1376 | format = unit_get_status_message_format(u, t); |
877d54e9 | 1377 | |
bcfce235 | 1378 | DISABLE_WARNING_FORMAT_NONLITERAL; |
877d54e9 | 1379 | snprintf(buf, sizeof(buf), format, unit_description(u)); |
bcfce235 | 1380 | REENABLE_WARNING; |
877d54e9 LP |
1381 | |
1382 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1383 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1384 | SD_MESSAGE_UNIT_RELOADING; | |
1385 | ||
f2341e0a LP |
1386 | /* Note that we deliberately use LOG_MESSAGE() instead of |
1387 | * LOG_UNIT_MESSAGE() here, since this is supposed to mimic | |
1388 | * closely what is written to screen using the status output, | |
1389 | * which is supposed the highest level, friendliest output | |
1390 | * possible, which means we should avoid the low-level unit | |
1391 | * name. */ | |
1392 | log_struct(LOG_INFO, | |
1393 | LOG_MESSAGE_ID(mid), | |
1394 | LOG_UNIT_ID(u), | |
1395 | LOG_MESSAGE("%s", buf), | |
1396 | NULL); | |
877d54e9 | 1397 | } |
877d54e9 | 1398 | |
d1a34ae9 MS |
1399 | void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t) { |
1400 | ||
1401 | unit_status_log_starting_stopping_reloading(u, t); | |
1402 | ||
1403 | /* Reload status messages have traditionally not been printed to console. */ | |
1404 | if (t != JOB_RELOAD) | |
1405 | unit_status_print_starting_stopping(u, t); | |
1406 | } | |
1407 | ||
87f0e418 | 1408 | /* Errors: |
d5159713 LP |
1409 | * -EBADR: This unit type does not support starting. |
1410 | * -EALREADY: Unit is already started. | |
1411 | * -EAGAIN: An operation is already in progress. Retry later. | |
1412 | * -ECANCELED: Too many requests for now. | |
59fccdc5 | 1413 | * -EPROTO: Assert failed |
87f0e418 LP |
1414 | */ |
1415 | int unit_start(Unit *u) { | |
1416 | UnitActiveState state; | |
92ab323c | 1417 | Unit *following; |
87f0e418 LP |
1418 | |
1419 | assert(u); | |
1420 | ||
ac155bb8 | 1421 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1422 | return -EINVAL; |
1423 | ||
a82e5507 LP |
1424 | /* If this is already started, then this will succeed. Note |
1425 | * that this will even succeed if this unit is not startable | |
1426 | * by the user. This is relied on to detect when we need to | |
1427 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1428 | state = unit_active_state(u); |
1429 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1430 | return -EALREADY; | |
1431 | ||
a82e5507 LP |
1432 | /* If the conditions failed, don't do anything at all. If we |
1433 | * already are activating this call might still be useful to | |
1434 | * speed up activation in case there is some hold-off time, | |
1435 | * but we don't want to recheck the condition in that case. */ | |
1436 | if (state != UNIT_ACTIVATING && | |
1437 | !unit_condition_test(u)) { | |
f2341e0a | 1438 | log_unit_debug(u, "Starting requested but condition failed. Not starting unit."); |
52661efd LP |
1439 | return -EALREADY; |
1440 | } | |
1441 | ||
59fccdc5 LP |
1442 | /* If the asserts failed, fail the entire job */ |
1443 | if (state != UNIT_ACTIVATING && | |
1444 | !unit_assert_test(u)) { | |
f2341e0a | 1445 | log_unit_notice(u, "Starting requested but asserts failed."); |
59fccdc5 LP |
1446 | return -EPROTO; |
1447 | } | |
1448 | ||
92ab323c | 1449 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1450 | following = unit_following(u); |
1451 | if (following) { | |
f2341e0a | 1452 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1453 | return unit_start(following); |
1454 | } | |
1455 | ||
1c2e9646 | 1456 | if (!unit_supported(u)) |
15411c0c | 1457 | return -EOPNOTSUPP; |
0faacd47 | 1458 | |
92ab323c LP |
1459 | /* If it is stopped, but we cannot start it, then fail */ |
1460 | if (!UNIT_VTABLE(u)->start) | |
1461 | return -EBADR; | |
1462 | ||
87f0e418 LP |
1463 | /* We don't suppress calls to ->start() here when we are |
1464 | * already starting, to allow this request to be used as a | |
1465 | * "hurry up" call, for example when the unit is in some "auto | |
1466 | * restart" state where it waits for a holdoff timer to elapse | |
1467 | * before it will start again. */ | |
1468 | ||
c1e1601e | 1469 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1470 | |
d1a34ae9 | 1471 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1472 | } |
1473 | ||
1474 | bool unit_can_start(Unit *u) { | |
1475 | assert(u); | |
1476 | ||
1477 | return !!UNIT_VTABLE(u)->start; | |
1478 | } | |
1479 | ||
2528a7a6 LP |
1480 | bool unit_can_isolate(Unit *u) { |
1481 | assert(u); | |
1482 | ||
1483 | return unit_can_start(u) && | |
ac155bb8 | 1484 | u->allow_isolate; |
2528a7a6 LP |
1485 | } |
1486 | ||
87f0e418 LP |
1487 | /* Errors: |
1488 | * -EBADR: This unit type does not support stopping. | |
1489 | * -EALREADY: Unit is already stopped. | |
1490 | * -EAGAIN: An operation is already in progress. Retry later. | |
1491 | */ | |
1492 | int unit_stop(Unit *u) { | |
1493 | UnitActiveState state; | |
92ab323c | 1494 | Unit *following; |
87f0e418 LP |
1495 | |
1496 | assert(u); | |
1497 | ||
87f0e418 | 1498 | state = unit_active_state(u); |
fdf20a31 | 1499 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1500 | return -EALREADY; |
1501 | ||
0faacd47 LP |
1502 | following = unit_following(u); |
1503 | if (following) { | |
f2341e0a | 1504 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1505 | return unit_stop(following); |
1506 | } | |
1507 | ||
7898b0cf LP |
1508 | if (!UNIT_VTABLE(u)->stop) |
1509 | return -EBADR; | |
1510 | ||
c1e1601e | 1511 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1512 | |
d1a34ae9 | 1513 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1514 | } |
1515 | ||
1516 | /* Errors: | |
1517 | * -EBADR: This unit type does not support reloading. | |
1518 | * -ENOEXEC: Unit is not started. | |
1519 | * -EAGAIN: An operation is already in progress. Retry later. | |
1520 | */ | |
1521 | int unit_reload(Unit *u) { | |
1522 | UnitActiveState state; | |
92ab323c | 1523 | Unit *following; |
87f0e418 LP |
1524 | |
1525 | assert(u); | |
1526 | ||
ac155bb8 | 1527 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1528 | return -EINVAL; |
1529 | ||
87f0e418 LP |
1530 | if (!unit_can_reload(u)) |
1531 | return -EBADR; | |
1532 | ||
1533 | state = unit_active_state(u); | |
e364ad06 | 1534 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1535 | return -EALREADY; |
1536 | ||
6a371e23 | 1537 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1538 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1539 | return -ENOEXEC; |
6a371e23 | 1540 | } |
87f0e418 | 1541 | |
e48614c4 ZJS |
1542 | following = unit_following(u); |
1543 | if (following) { | |
f2341e0a | 1544 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1545 | return unit_reload(following); |
1546 | } | |
1547 | ||
c1e1601e | 1548 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1549 | |
d1a34ae9 | 1550 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1551 | } |
1552 | ||
1553 | bool unit_can_reload(Unit *u) { | |
1554 | assert(u); | |
1555 | ||
1556 | if (!UNIT_VTABLE(u)->reload) | |
1557 | return false; | |
1558 | ||
1559 | if (!UNIT_VTABLE(u)->can_reload) | |
1560 | return true; | |
1561 | ||
1562 | return UNIT_VTABLE(u)->can_reload(u); | |
1563 | } | |
1564 | ||
b4a16b7b | 1565 | static void unit_check_unneeded(Unit *u) { |
be7d9ff7 LP |
1566 | |
1567 | static const UnitDependency needed_dependencies[] = { | |
1568 | UNIT_REQUIRED_BY, | |
1569 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
084918ba | 1570 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1571 | UNIT_REQUISITE_OF_OVERRIDABLE, |
1572 | UNIT_WANTED_BY, | |
1573 | UNIT_BOUND_BY, | |
1574 | }; | |
1575 | ||
f3bff0eb | 1576 | Unit *other; |
be7d9ff7 LP |
1577 | Iterator i; |
1578 | unsigned j; | |
1579 | int r; | |
f3bff0eb LP |
1580 | |
1581 | assert(u); | |
1582 | ||
1583 | /* If this service shall be shut down when unneeded then do | |
1584 | * so. */ | |
1585 | ||
ac155bb8 | 1586 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1587 | return; |
1588 | ||
1589 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1590 | return; | |
1591 | ||
be7d9ff7 | 1592 | for (j = 0; j < ELEMENTSOF(needed_dependencies); j++) |
f3b85044 | 1593 | SET_FOREACH(other, u->dependencies[needed_dependencies[j]], i) |
be7d9ff7 LP |
1594 | if (unit_active_or_pending(other)) |
1595 | return; | |
b81884e7 | 1596 | |
bea355da LP |
1597 | /* If stopping a unit fails continously we might enter a stop |
1598 | * loop here, hence stop acting on the service being | |
1599 | * unnecessary after a while. */ | |
67bfdc97 | 1600 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { |
bea355da LP |
1601 | log_unit_warning(u, "Unit not needed anymore, but not stopping since we tried this too often recently."); |
1602 | return; | |
1603 | } | |
1604 | ||
f2341e0a | 1605 | log_unit_info(u, "Unit not needed anymore. Stopping."); |
f3bff0eb LP |
1606 | |
1607 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
be7d9ff7 LP |
1608 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
1609 | if (r < 0) | |
1610 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %m"); | |
f3bff0eb LP |
1611 | } |
1612 | ||
ff502445 LP |
1613 | static void unit_check_binds_to(Unit *u) { |
1614 | bool stop = false; | |
1615 | Unit *other; | |
1616 | Iterator i; | |
67bfdc97 | 1617 | int r; |
ff502445 LP |
1618 | |
1619 | assert(u); | |
1620 | ||
1621 | if (u->job) | |
1622 | return; | |
1623 | ||
1624 | if (unit_active_state(u) != UNIT_ACTIVE) | |
1625 | return; | |
1626 | ||
1627 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) { | |
1628 | if (other->job) | |
1629 | continue; | |
1630 | ||
1631 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1632 | continue; | |
1633 | ||
1634 | stop = true; | |
98f738b6 | 1635 | break; |
ff502445 LP |
1636 | } |
1637 | ||
1638 | if (!stop) | |
1639 | return; | |
1640 | ||
67bfdc97 LP |
1641 | /* If stopping a unit fails continously we might enter a stop |
1642 | * loop here, hence stop acting on the service being | |
1643 | * unnecessary after a while. */ | |
1644 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { | |
1645 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); | |
1646 | return; | |
1647 | } | |
1648 | ||
98f738b6 | 1649 | assert(other); |
f2341e0a | 1650 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
1651 | |
1652 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
67bfdc97 LP |
1653 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
1654 | if (r < 0) | |
1655 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %m"); | |
ff502445 LP |
1656 | } |
1657 | ||
87f0e418 LP |
1658 | static void retroactively_start_dependencies(Unit *u) { |
1659 | Iterator i; | |
1660 | Unit *other; | |
1661 | ||
1662 | assert(u); | |
1663 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1664 | ||
ac155bb8 MS |
1665 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1666 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1667 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1668 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1669 | |
7f2cddae | 1670 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1671 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1672 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1673 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1674 | |
ac155bb8 MS |
1675 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
1676 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1677 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1678 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1679 | |
ac155bb8 MS |
1680 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1681 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1682 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1683 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1684 | |
ac155bb8 | 1685 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1686 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1687 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1688 | |
ac155bb8 | 1689 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1690 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1691 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1692 | } |
1693 | ||
1694 | static void retroactively_stop_dependencies(Unit *u) { | |
1695 | Iterator i; | |
1696 | Unit *other; | |
1697 | ||
1698 | assert(u); | |
1699 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1700 | ||
b81884e7 | 1701 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1702 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1703 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1704 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1705 | } |
1706 | ||
1707 | static void check_unneeded_dependencies(Unit *u) { | |
1708 | Iterator i; | |
1709 | Unit *other; | |
1710 | ||
1711 | assert(u); | |
1712 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1713 | |
1714 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1715 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1716 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1717 | unit_check_unneeded(other); |
ac155bb8 | 1718 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1719 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1720 | unit_check_unneeded(other); |
ac155bb8 | 1721 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1722 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1723 | unit_check_unneeded(other); |
ac155bb8 | 1724 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1725 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1726 | unit_check_unneeded(other); |
ac155bb8 | 1727 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1728 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1729 | unit_check_unneeded(other); |
7f2cddae | 1730 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1731 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1732 | unit_check_unneeded(other); | |
87f0e418 LP |
1733 | } |
1734 | ||
3ecaa09b | 1735 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1736 | Unit *other; |
1737 | Iterator i; | |
1738 | ||
1739 | assert(u); | |
1740 | ||
ac155bb8 | 1741 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1742 | return; |
1743 | ||
f2341e0a | 1744 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 1745 | |
ac155bb8 | 1746 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1747 | int r; |
1748 | ||
d420282b | 1749 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, true, NULL, NULL); |
c1b6628d | 1750 | if (r < 0) |
f2341e0a | 1751 | log_unit_error_errno(u, r, "Failed to enqueue OnFailure= job: %m"); |
222ae6a8 | 1752 | } |
c0daa706 LP |
1753 | } |
1754 | ||
3ecaa09b LP |
1755 | void unit_trigger_notify(Unit *u) { |
1756 | Unit *other; | |
1757 | Iterator i; | |
1758 | ||
1759 | assert(u); | |
1760 | ||
1761 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1762 | if (UNIT_VTABLE(other)->trigger_notify) | |
1763 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1764 | } | |
1765 | ||
e2f3b44c | 1766 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 1767 | Manager *m; |
7e6e7b06 | 1768 | bool unexpected; |
a096ed36 | 1769 | |
87f0e418 LP |
1770 | assert(u); |
1771 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1772 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1773 | |
8e471ccd LP |
1774 | /* Note that this is called for all low-level state changes, |
1775 | * even if they might map to the same high-level | |
865cc19a | 1776 | * UnitActiveState! That means that ns == os is an expected |
c5315881 | 1777 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1778 | * this function will be called too! */ |
87f0e418 | 1779 | |
546ac4f0 MS |
1780 | m = u->manager; |
1781 | ||
f755e3b7 | 1782 | /* Update timestamps for state changes */ |
546ac4f0 | 1783 | if (m->n_reloading <= 0) { |
bdbf9951 | 1784 | dual_timestamp ts; |
173e3821 | 1785 | |
bdbf9951 | 1786 | dual_timestamp_get(&ts); |
173e3821 | 1787 | |
bdbf9951 | 1788 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1789 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1790 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1791 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1792 | |
1793 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1794 | u->active_enter_timestamp = ts; |
bdbf9951 | 1795 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1796 | u->active_exit_timestamp = ts; |
bdbf9951 | 1797 | } |
87f0e418 | 1798 | |
865cc19a | 1799 | /* Keep track of failed units */ |
03455c28 | 1800 | manager_update_failed_units(u->manager, u, ns == UNIT_FAILED); |
f755e3b7 LP |
1801 | |
1802 | /* Make sure the cgroup is always removed when we become inactive */ | |
fdf20a31 | 1803 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
b1491eba | 1804 | unit_destroy_cgroup_if_empty(u); |
fb385181 | 1805 | |
9cd86184 | 1806 | /* Note that this doesn't apply to RemainAfterExit services exiting |
6f285378 | 1807 | * successfully, since there's no change of state in that case. Which is |
9cd86184 | 1808 | * why it is handled in service_set_state() */ |
7ed9f6cd | 1809 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
1810 | ExecContext *ec; |
1811 | ||
1812 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 1813 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 ZJS |
1814 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
1815 | m->n_on_console --; | |
1816 | ||
1817 | if (m->n_on_console == 0) | |
1818 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 1819 | m->no_console_output = false; |
31a7eb86 ZJS |
1820 | } else |
1821 | m->n_on_console ++; | |
7ed9f6cd MS |
1822 | } |
1823 | } | |
1824 | ||
ac155bb8 | 1825 | if (u->job) { |
7e6e7b06 | 1826 | unexpected = false; |
87f0e418 | 1827 | |
ac155bb8 | 1828 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1829 | |
1830 | /* So we reached a different state for this | |
1831 | * job. Let's see if we can run it now if it | |
1832 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1833 | job_add_to_run_queue(u->job); |
87f0e418 | 1834 | |
b410e6b9 | 1835 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1836 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1837 | * hence needs to invalidate jobs. */ |
87f0e418 | 1838 | |
ac155bb8 | 1839 | switch (u->job->type) { |
87f0e418 | 1840 | |
b410e6b9 LP |
1841 | case JOB_START: |
1842 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1843 | |
b410e6b9 | 1844 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1845 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1846 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1847 | unexpected = true; |
41b02ec7 | 1848 | |
fdf20a31 | 1849 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1850 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1851 | } |
87f0e418 | 1852 | |
b410e6b9 | 1853 | break; |
87f0e418 | 1854 | |
b410e6b9 LP |
1855 | case JOB_RELOAD: |
1856 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1857 | |
ac155bb8 | 1858 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1859 | if (ns == UNIT_ACTIVE) |
5273510e | 1860 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1861 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1862 | unexpected = true; |
41b02ec7 | 1863 | |
fdf20a31 | 1864 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1865 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1866 | } |
b410e6b9 | 1867 | } |
87f0e418 | 1868 | |
b410e6b9 | 1869 | break; |
87f0e418 | 1870 | |
b410e6b9 LP |
1871 | case JOB_STOP: |
1872 | case JOB_RESTART: | |
1873 | case JOB_TRY_RESTART: | |
87f0e418 | 1874 | |
fdf20a31 | 1875 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1876 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1877 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1878 | unexpected = true; |
5273510e | 1879 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1880 | } |
87f0e418 | 1881 | |
b410e6b9 | 1882 | break; |
87f0e418 | 1883 | |
b410e6b9 LP |
1884 | default: |
1885 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1886 | } |
87f0e418 | 1887 | |
7e6e7b06 LP |
1888 | } else |
1889 | unexpected = true; | |
1890 | ||
546ac4f0 | 1891 | if (m->n_reloading <= 0) { |
f3bff0eb | 1892 | |
bdbf9951 LP |
1893 | /* If this state change happened without being |
1894 | * requested by a job, then let's retroactively start | |
1895 | * or stop dependencies. We skip that step when | |
1896 | * deserializing, since we don't want to create any | |
1897 | * additional jobs just because something is already | |
1898 | * activated. */ | |
1899 | ||
1900 | if (unexpected) { | |
1901 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1902 | retroactively_start_dependencies(u); | |
1903 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1904 | retroactively_stop_dependencies(u); | |
1905 | } | |
5de9682c | 1906 | |
cd0504d0 | 1907 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 1908 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
1909 | check_unneeded_dependencies(u); |
1910 | ||
bdbf9951 | 1911 | if (ns != os && ns == UNIT_FAILED) { |
f2341e0a | 1912 | log_unit_notice(u, "Unit entered failed state."); |
3ecaa09b | 1913 | unit_start_on_failure(u); |
cd6d0a45 | 1914 | } |
3b2775c5 | 1915 | } |
e537352b | 1916 | |
3b2775c5 LP |
1917 | /* Some names are special */ |
1918 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1919 | ||
1920 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
865cc19a | 1921 | /* The bus might have just become available, |
3b2775c5 LP |
1922 | * hence try to connect to it, if we aren't |
1923 | * yet connected. */ | |
546ac4f0 | 1924 | bus_init(m, true); |
3b2775c5 | 1925 | |
ac155bb8 | 1926 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1927 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
546ac4f0 | 1928 | m->n_reloading <= 0) { |
3b2775c5 | 1929 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 1930 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 1931 | u->in_audit = true; |
3b2775c5 | 1932 | } |
e983b760 | 1933 | |
3b2775c5 | 1934 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 1935 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 1936 | |
3b2775c5 | 1937 | } else { |
bdbf9951 | 1938 | |
3b2775c5 LP |
1939 | /* We don't care about D-Bus here, since we'll get an |
1940 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1941 | |
ac155bb8 | 1942 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1943 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1944 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
546ac4f0 | 1945 | m->n_reloading <= 0) { |
4927fcae | 1946 | |
3b2775c5 LP |
1947 | /* Hmm, if there was no start record written |
1948 | * write it now, so that we always have a nice | |
1949 | * pair */ | |
ac155bb8 | 1950 | if (!u->in_audit) { |
546ac4f0 | 1951 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 1952 | |
3b2775c5 | 1953 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 1954 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1955 | } else |
1956 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 1957 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1958 | |
ac155bb8 | 1959 | u->in_audit = false; |
cd6d0a45 | 1960 | } |
f278026d LP |
1961 | } |
1962 | ||
546ac4f0 | 1963 | manager_recheck_journal(m); |
3ecaa09b | 1964 | unit_trigger_notify(u); |
3b2775c5 | 1965 | |
ff502445 LP |
1966 | if (u->manager->n_reloading <= 0) { |
1967 | /* Maybe we finished startup and are now ready for | |
1968 | * being stopped because unneeded? */ | |
bf6dcfa6 | 1969 | unit_check_unneeded(u); |
c1e1601e | 1970 | |
ff502445 LP |
1971 | /* Maybe we finished startup, but something we needed |
1972 | * has vanished? Let's die then. (This happens when | |
1973 | * something BindsTo= to a Type=oneshot unit, as these | |
1974 | * units go directly from starting to inactive, | |
1975 | * without ever entering started.) */ | |
1976 | unit_check_binds_to(u); | |
1977 | } | |
1978 | ||
c1e1601e | 1979 | unit_add_to_dbus_queue(u); |
701cc384 | 1980 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1981 | } |
1982 | ||
87f0e418 | 1983 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
1984 | int q, r; |
1985 | ||
87f0e418 LP |
1986 | assert(u); |
1987 | assert(pid >= 1); | |
1988 | ||
5ba6985b LP |
1989 | /* Watch a specific PID. We only support one or two units |
1990 | * watching each PID for now, not more. */ | |
1991 | ||
d5099efc | 1992 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
1993 | if (r < 0) |
1994 | return r; | |
1995 | ||
d5099efc | 1996 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL); |
a911bb9a LP |
1997 | if (r < 0) |
1998 | return r; | |
1999 | ||
5ba6985b LP |
2000 | r = hashmap_put(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
2001 | if (r == -EEXIST) { | |
d5099efc | 2002 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL); |
5ba6985b LP |
2003 | if (r < 0) |
2004 | return r; | |
05e343b7 | 2005 | |
5ba6985b LP |
2006 | r = hashmap_put(u->manager->watch_pids2, LONG_TO_PTR(pid), u); |
2007 | } | |
a911bb9a | 2008 | |
5ba6985b | 2009 | q = set_put(u->pids, LONG_TO_PTR(pid)); |
a911bb9a LP |
2010 | if (q < 0) |
2011 | return q; | |
2012 | ||
2013 | return r; | |
87f0e418 LP |
2014 | } |
2015 | ||
2016 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
2017 | assert(u); | |
2018 | assert(pid >= 1); | |
2019 | ||
5ba6985b LP |
2020 | hashmap_remove_value(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
2021 | hashmap_remove_value(u->manager->watch_pids2, LONG_TO_PTR(pid), u); | |
a911bb9a LP |
2022 | set_remove(u->pids, LONG_TO_PTR(pid)); |
2023 | } | |
2024 | ||
bd44e61b LP |
2025 | void unit_unwatch_all_pids(Unit *u) { |
2026 | assert(u); | |
2027 | ||
2028 | while (!set_isempty(u->pids)) | |
2029 | unit_unwatch_pid(u, PTR_TO_LONG(set_first(u->pids))); | |
2030 | ||
2031 | set_free(u->pids); | |
2032 | u->pids = NULL; | |
2033 | } | |
2034 | ||
2035 | static int unit_watch_pids_in_path(Unit *u, const char *path) { | |
a911bb9a LP |
2036 | _cleanup_closedir_ DIR *d = NULL; |
2037 | _cleanup_fclose_ FILE *f = NULL; | |
2038 | int ret = 0, r; | |
2039 | ||
2040 | assert(u); | |
2041 | assert(path); | |
2042 | ||
2043 | /* Adds all PIDs from a specific cgroup path to the set of PIDs we watch. */ | |
2044 | ||
2045 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f); | |
2046 | if (r >= 0) { | |
2047 | pid_t pid; | |
2048 | ||
2049 | while ((r = cg_read_pid(f, &pid)) > 0) { | |
2050 | r = unit_watch_pid(u, pid); | |
2051 | if (r < 0 && ret >= 0) | |
2052 | ret = r; | |
2053 | } | |
2054 | if (r < 0 && ret >= 0) | |
2055 | ret = r; | |
2056 | ||
2057 | } else if (ret >= 0) | |
2058 | ret = r; | |
2059 | ||
2060 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d); | |
2061 | if (r >= 0) { | |
2062 | char *fn; | |
2063 | ||
2064 | while ((r = cg_read_subgroup(d, &fn)) > 0) { | |
2065 | _cleanup_free_ char *p = NULL; | |
2066 | ||
2067 | p = strjoin(path, "/", fn, NULL); | |
2068 | free(fn); | |
2069 | ||
2070 | if (!p) | |
2071 | return -ENOMEM; | |
2072 | ||
bd44e61b | 2073 | r = unit_watch_pids_in_path(u, p); |
a911bb9a LP |
2074 | if (r < 0 && ret >= 0) |
2075 | ret = r; | |
2076 | } | |
2077 | if (r < 0 && ret >= 0) | |
2078 | ret = r; | |
2079 | ||
2080 | } else if (ret >= 0) | |
2081 | ret = r; | |
2082 | ||
2083 | return ret; | |
2084 | } | |
2085 | ||
a911bb9a LP |
2086 | int unit_watch_all_pids(Unit *u) { |
2087 | assert(u); | |
2088 | ||
a911bb9a LP |
2089 | /* Adds all PIDs from our cgroup to the set of PIDs we watch */ |
2090 | ||
bd44e61b LP |
2091 | if (!u->cgroup_path) |
2092 | return -ENOENT; | |
a911bb9a | 2093 | |
bd44e61b | 2094 | return unit_watch_pids_in_path(u, u->cgroup_path); |
a911bb9a LP |
2095 | } |
2096 | ||
2097 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2098 | Iterator i; | |
2099 | void *e; | |
2100 | ||
2101 | assert(u); | |
2102 | ||
2103 | /* Cleans dead PIDs from our list */ | |
2104 | ||
2105 | SET_FOREACH(e, u->pids, i) { | |
2106 | pid_t pid = PTR_TO_LONG(e); | |
2107 | ||
2108 | if (pid == except1 || pid == except2) | |
2109 | continue; | |
2110 | ||
9f5650ae | 2111 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2112 | unit_unwatch_pid(u, pid); |
a911bb9a | 2113 | } |
87f0e418 LP |
2114 | } |
2115 | ||
87f0e418 LP |
2116 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2117 | assert(u); | |
2118 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2119 | ||
2120 | switch (j) { | |
2121 | ||
2122 | case JOB_VERIFY_ACTIVE: | |
2123 | case JOB_START: | |
57339f47 | 2124 | case JOB_STOP: |
e0209d83 | 2125 | case JOB_NOP: |
87f0e418 LP |
2126 | return true; |
2127 | ||
87f0e418 LP |
2128 | case JOB_RESTART: |
2129 | case JOB_TRY_RESTART: | |
2130 | return unit_can_start(u); | |
2131 | ||
2132 | case JOB_RELOAD: | |
2133 | return unit_can_reload(u); | |
2134 | ||
2135 | case JOB_RELOAD_OR_START: | |
2136 | return unit_can_reload(u) && unit_can_start(u); | |
2137 | ||
2138 | default: | |
2139 | assert_not_reached("Invalid job type"); | |
2140 | } | |
2141 | } | |
2142 | ||
f2341e0a LP |
2143 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2144 | assert(u); | |
d1fab3fe | 2145 | |
f2341e0a LP |
2146 | /* Only warn about some unit types */ |
2147 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2148 | return; | |
3f3cc397 | 2149 | |
f2341e0a LP |
2150 | if (streq_ptr(u->id, other)) |
2151 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2152 | else | |
2153 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2154 | } |
2155 | ||
701cc384 | 2156 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
2157 | |
2158 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2159 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 2160 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 | 2161 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 LP |
2162 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
2163 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUISITE_OF_OVERRIDABLE, | |
7f2cddae | 2164 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2165 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 LP |
2166 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
2167 | [UNIT_REQUIRED_BY_OVERRIDABLE] = UNIT_REQUIRES_OVERRIDABLE, | |
2168 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, | |
2169 | [UNIT_REQUISITE_OF_OVERRIDABLE] = UNIT_REQUISITE_OVERRIDABLE, | |
2170 | [UNIT_WANTED_BY] = UNIT_WANTS, | |
7f2cddae | 2171 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2172 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2173 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2174 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2175 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2176 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2177 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2178 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2179 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2180 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2181 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2182 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2183 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2184 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2185 | }; |
701cc384 | 2186 | int r, q = 0, v = 0, w = 0; |
d1fab3fe | 2187 | Unit *orig_u = u, *orig_other = other; |
87f0e418 LP |
2188 | |
2189 | assert(u); | |
2190 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2191 | assert(other); |
2192 | ||
9f151f29 LP |
2193 | u = unit_follow_merge(u); |
2194 | other = unit_follow_merge(other); | |
2195 | ||
87f0e418 LP |
2196 | /* We won't allow dependencies on ourselves. We will not |
2197 | * consider them an error however. */ | |
d1fab3fe | 2198 | if (u == other) { |
f2341e0a | 2199 | maybe_warn_about_dependency(orig_u, orig_other->id, d); |
87f0e418 | 2200 | return 0; |
d1fab3fe | 2201 | } |
87f0e418 | 2202 | |
d5099efc | 2203 | r = set_ensure_allocated(&u->dependencies[d], NULL); |
613b411c | 2204 | if (r < 0) |
87f0e418 LP |
2205 | return r; |
2206 | ||
613b411c | 2207 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
d5099efc | 2208 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], NULL); |
613b411c LP |
2209 | if (r < 0) |
2210 | return r; | |
2211 | } | |
2212 | ||
2213 | if (add_reference) { | |
d5099efc | 2214 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], NULL); |
613b411c | 2215 | if (r < 0) |
5de9682c LP |
2216 | return r; |
2217 | ||
d5099efc | 2218 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], NULL); |
613b411c | 2219 | if (r < 0) |
701cc384 | 2220 | return r; |
613b411c | 2221 | } |
87f0e418 | 2222 | |
613b411c LP |
2223 | q = set_put(u->dependencies[d], other); |
2224 | if (q < 0) | |
701cc384 | 2225 | return q; |
87f0e418 | 2226 | |
613b411c LP |
2227 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2228 | v = set_put(other->dependencies[inverse_table[d]], u); | |
2229 | if (v < 0) { | |
5de9682c LP |
2230 | r = v; |
2231 | goto fail; | |
2232 | } | |
613b411c | 2233 | } |
701cc384 LP |
2234 | |
2235 | if (add_reference) { | |
613b411c LP |
2236 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
2237 | if (w < 0) { | |
701cc384 LP |
2238 | r = w; |
2239 | goto fail; | |
2240 | } | |
2241 | ||
613b411c LP |
2242 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
2243 | if (r < 0) | |
701cc384 | 2244 | goto fail; |
87f0e418 LP |
2245 | } |
2246 | ||
c1e1601e | 2247 | unit_add_to_dbus_queue(u); |
87f0e418 | 2248 | return 0; |
701cc384 LP |
2249 | |
2250 | fail: | |
2251 | if (q > 0) | |
ac155bb8 | 2252 | set_remove(u->dependencies[d], other); |
701cc384 LP |
2253 | |
2254 | if (v > 0) | |
ac155bb8 | 2255 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
2256 | |
2257 | if (w > 0) | |
ac155bb8 | 2258 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
2259 | |
2260 | return r; | |
87f0e418 | 2261 | } |
0301abf4 | 2262 | |
2c966c03 LP |
2263 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
2264 | int r; | |
2265 | ||
2266 | assert(u); | |
2267 | ||
3f3cc397 LP |
2268 | r = unit_add_dependency(u, d, other, add_reference); |
2269 | if (r < 0) | |
2c966c03 LP |
2270 | return r; |
2271 | ||
7410616c | 2272 | return unit_add_dependency(u, e, other, add_reference); |
2c966c03 LP |
2273 | } |
2274 | ||
7410616c LP |
2275 | static int resolve_template(Unit *u, const char *name, const char*path, char **buf, const char **ret) { |
2276 | int r; | |
9e2f7c11 LP |
2277 | |
2278 | assert(u); | |
2279 | assert(name || path); | |
7410616c LP |
2280 | assert(buf); |
2281 | assert(ret); | |
9e2f7c11 LP |
2282 | |
2283 | if (!name) | |
2b6bf07d | 2284 | name = basename(path); |
9e2f7c11 | 2285 | |
7410616c LP |
2286 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2287 | *buf = NULL; | |
2288 | *ret = name; | |
2289 | return 0; | |
9e2f7c11 LP |
2290 | } |
2291 | ||
ac155bb8 | 2292 | if (u->instance) |
7410616c | 2293 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 2294 | else { |
ae018d9b | 2295 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2296 | |
7410616c LP |
2297 | r = unit_name_to_prefix(u->id, &i); |
2298 | if (r < 0) | |
2299 | return r; | |
9e2f7c11 | 2300 | |
7410616c | 2301 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 2302 | } |
7410616c LP |
2303 | if (r < 0) |
2304 | return r; | |
9e2f7c11 | 2305 | |
7410616c LP |
2306 | *ret = *buf; |
2307 | return 0; | |
9e2f7c11 LP |
2308 | } |
2309 | ||
701cc384 | 2310 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
7410616c | 2311 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
2312 | Unit *other; |
2313 | int r; | |
2314 | ||
9e2f7c11 LP |
2315 | assert(u); |
2316 | assert(name || path); | |
09b6b09f | 2317 | |
7410616c LP |
2318 | r = resolve_template(u, name, path, &buf, &name); |
2319 | if (r < 0) | |
2320 | return r; | |
09b6b09f | 2321 | |
8afbb8e1 LP |
2322 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2323 | if (r < 0) | |
2324 | return r; | |
9e2f7c11 | 2325 | |
8afbb8e1 | 2326 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
2327 | } |
2328 | ||
2c966c03 | 2329 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
7410616c | 2330 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2331 | Unit *other; |
2332 | int r; | |
2c966c03 LP |
2333 | |
2334 | assert(u); | |
2335 | assert(name || path); | |
2336 | ||
7410616c LP |
2337 | r = resolve_template(u, name, path, &buf, &name); |
2338 | if (r < 0) | |
2339 | return r; | |
2c966c03 | 2340 | |
3f3cc397 LP |
2341 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2342 | if (r < 0) | |
68eda4bd | 2343 | return r; |
2c966c03 | 2344 | |
3f3cc397 | 2345 | return unit_add_two_dependencies(u, d, e, other, add_reference); |
2c966c03 LP |
2346 | } |
2347 | ||
701cc384 | 2348 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
7410616c | 2349 | _cleanup_free_ char *buf = NULL; |
bd77d0fc LP |
2350 | Unit *other; |
2351 | int r; | |
2352 | ||
9e2f7c11 LP |
2353 | assert(u); |
2354 | assert(name || path); | |
bd77d0fc | 2355 | |
7410616c LP |
2356 | r = resolve_template(u, name, path, &buf, &name); |
2357 | if (r < 0) | |
2358 | return r; | |
bd77d0fc | 2359 | |
3f3cc397 LP |
2360 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2361 | if (r < 0) | |
68eda4bd | 2362 | return r; |
9e2f7c11 | 2363 | |
3f3cc397 | 2364 | return unit_add_dependency(other, d, u, add_reference); |
bd77d0fc LP |
2365 | } |
2366 | ||
2c966c03 | 2367 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
7410616c | 2368 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2369 | Unit *other; |
2370 | int r; | |
2c966c03 LP |
2371 | |
2372 | assert(u); | |
2373 | assert(name || path); | |
2374 | ||
7410616c | 2375 | r = resolve_template(u, name, path, &buf, &name); |
3f3cc397 | 2376 | if (r < 0) |
68eda4bd | 2377 | return r; |
2c966c03 | 2378 | |
7410616c | 2379 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
3f3cc397 | 2380 | if (r < 0) |
68eda4bd | 2381 | return r; |
2c966c03 | 2382 | |
7410616c | 2383 | return unit_add_two_dependencies(other, d, e, u, add_reference); |
2c966c03 LP |
2384 | } |
2385 | ||
0301abf4 | 2386 | int set_unit_path(const char *p) { |
0301abf4 | 2387 | /* This is mostly for debug purposes */ |
cf7d80a5 | 2388 | if (setenv("SYSTEMD_UNIT_PATH", p, 0) < 0) |
26d04f86 | 2389 | return -errno; |
0301abf4 LP |
2390 | |
2391 | return 0; | |
2392 | } | |
88066b3a | 2393 | |
ea430986 | 2394 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2395 | assert(u); |
2396 | ||
ac155bb8 | 2397 | if (!u->id) |
04ade7d2 LP |
2398 | return NULL; |
2399 | ||
48899192 | 2400 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2401 | } |
2402 | ||
41f9172f | 2403 | char *unit_default_cgroup_path(Unit *u) { |
d7bd3de0 | 2404 | _cleanup_free_ char *escaped = NULL, *slice = NULL; |
a016b922 | 2405 | int r; |
5954c074 | 2406 | |
013b87c0 LP |
2407 | assert(u); |
2408 | ||
4ad49000 LP |
2409 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
2410 | return strdup(u->manager->cgroup_root); | |
2411 | ||
2412 | if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) { | |
a016b922 LP |
2413 | r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice); |
2414 | if (r < 0) | |
2415 | return NULL; | |
2416 | } | |
2417 | ||
d7bd3de0 LP |
2418 | escaped = cg_escape(u->id); |
2419 | if (!escaped) | |
5954c074 LP |
2420 | return NULL; |
2421 | ||
d7bd3de0 LP |
2422 | if (slice) |
2423 | return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL); | |
2424 | else | |
2425 | return strjoin(u->manager->cgroup_root, "/", escaped, NULL); | |
013b87c0 LP |
2426 | } |
2427 | ||
d79200e2 LP |
2428 | int unit_set_slice(Unit *u, Unit *slice) { |
2429 | assert(u); | |
2430 | assert(slice); | |
2431 | ||
2432 | /* Sets the unit slice if it has not been set before. Is extra | |
2433 | * careful, to only allow this for units that actually have a | |
2434 | * cgroup context. Also, we don't allow to set this for slices | |
2435 | * (since the parent slice is derived from the name). Make | |
2436 | * sure the unit we set is actually a slice. */ | |
2437 | ||
2438 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
2439 | return -EOPNOTSUPP; | |
2440 | ||
2441 | if (u->type == UNIT_SLICE) | |
2442 | return -EINVAL; | |
2443 | ||
2444 | if (slice->type != UNIT_SLICE) | |
2445 | return -EINVAL; | |
2446 | ||
2447 | if (UNIT_DEREF(u->slice) == slice) | |
2448 | return 0; | |
2449 | ||
2450 | if (UNIT_ISSET(u->slice)) | |
2451 | return -EBUSY; | |
2452 | ||
2453 | unit_ref_set(&u->slice, slice); | |
2454 | return 1; | |
2455 | } | |
2456 | ||
2457 | int unit_set_default_slice(Unit *u) { | |
a8833944 LP |
2458 | _cleanup_free_ char *b = NULL; |
2459 | const char *slice_name; | |
a016b922 LP |
2460 | Unit *slice; |
2461 | int r; | |
2462 | ||
2463 | assert(u); | |
2464 | ||
9444b1f2 | 2465 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2466 | return 0; |
2467 | ||
a8833944 LP |
2468 | if (u->instance) { |
2469 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2470 | |
a8833944 LP |
2471 | /* Implicitly place all instantiated units in their |
2472 | * own per-template slice */ | |
2473 | ||
7410616c LP |
2474 | r = unit_name_to_prefix(u->id, &prefix); |
2475 | if (r < 0) | |
2476 | return r; | |
a8833944 LP |
2477 | |
2478 | /* The prefix is already escaped, but it might include | |
2479 | * "-" which has a special meaning for slice units, | |
2480 | * hence escape it here extra. */ | |
7410616c | 2481 | escaped = unit_name_escape(prefix); |
a8833944 LP |
2482 | if (!escaped) |
2483 | return -ENOMEM; | |
2484 | ||
b2c23da8 | 2485 | if (u->manager->running_as == MANAGER_SYSTEM) |
a8833944 LP |
2486 | b = strjoin("system-", escaped, ".slice", NULL); |
2487 | else | |
2488 | b = strappend(escaped, ".slice"); | |
2489 | if (!b) | |
2490 | return -ENOMEM; | |
2491 | ||
2492 | slice_name = b; | |
2493 | } else | |
2494 | slice_name = | |
b2c23da8 | 2495 | u->manager->running_as == MANAGER_SYSTEM |
a8833944 LP |
2496 | ? SPECIAL_SYSTEM_SLICE |
2497 | : SPECIAL_ROOT_SLICE; | |
2498 | ||
2499 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2500 | if (r < 0) |
2501 | return r; | |
2502 | ||
d79200e2 | 2503 | return unit_set_slice(u, slice); |
a016b922 LP |
2504 | } |
2505 | ||
9444b1f2 LP |
2506 | const char *unit_slice_name(Unit *u) { |
2507 | assert(u); | |
2508 | ||
2509 | if (!UNIT_ISSET(u->slice)) | |
2510 | return NULL; | |
2511 | ||
2512 | return UNIT_DEREF(u->slice)->id; | |
2513 | } | |
2514 | ||
f6ff8c29 | 2515 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2516 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2517 | int r; |
2518 | ||
2519 | assert(u); | |
2520 | assert(type); | |
2521 | assert(_found); | |
2522 | ||
7410616c LP |
2523 | r = unit_name_change_suffix(u->id, type, &t); |
2524 | if (r < 0) | |
2525 | return r; | |
2526 | if (unit_has_name(u, t)) | |
2527 | return -EINVAL; | |
f6ff8c29 | 2528 | |
ac155bb8 | 2529 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2530 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2531 | return r; |
2532 | } | |
2533 | ||
bbc29086 DM |
2534 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
2535 | const char *name, *old_owner, *new_owner; | |
2536 | Unit *u = userdata; | |
2537 | int r; | |
2538 | ||
2539 | assert(message); | |
2540 | assert(u); | |
2541 | ||
2542 | r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner); | |
2543 | if (r < 0) { | |
2544 | bus_log_parse_error(r); | |
2545 | return 0; | |
2546 | } | |
2547 | ||
2548 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
2549 | UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); | |
2550 | ||
2551 | return 0; | |
2552 | } | |
2553 | ||
2554 | int unit_install_bus_match(sd_bus *bus, Unit *u, const char *name) { | |
2555 | _cleanup_free_ char *match = NULL; | |
2556 | Manager *m = u->manager; | |
2557 | ||
2558 | assert(m); | |
2559 | ||
2560 | if (u->match_bus_slot) | |
2561 | return -EBUSY; | |
2562 | ||
2563 | match = strjoin("type='signal'," | |
2564 | "sender='org.freedesktop.DBus'," | |
2565 | "path='/org/freedesktop/DBus'," | |
2566 | "interface='org.freedesktop.DBus'," | |
2567 | "member='NameOwnerChanged'," | |
2568 | "arg0='", | |
2569 | name, | |
2570 | "'", | |
2571 | NULL); | |
2572 | if (!match) | |
2573 | return -ENOMEM; | |
2574 | ||
2575 | return sd_bus_add_match(bus, &u->match_bus_slot, match, signal_name_owner_changed, u); | |
2576 | } | |
2577 | ||
05e343b7 | 2578 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
2579 | int r; |
2580 | ||
05e343b7 LP |
2581 | assert(u); |
2582 | assert(name); | |
2583 | ||
2584 | /* Watch a specific name on the bus. We only support one unit | |
2585 | * watching each name for now. */ | |
2586 | ||
bbc29086 DM |
2587 | if (u->manager->api_bus) { |
2588 | /* If the bus is already available, install the match directly. | |
2589 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
2590 | r = unit_install_bus_match(u->manager->api_bus, u, name); | |
2591 | if (r < 0) | |
2592 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal: %m"); | |
2593 | } | |
2594 | ||
2595 | r = hashmap_put(u->manager->watch_bus, name, u); | |
2596 | if (r < 0) { | |
2597 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
2598 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); | |
2599 | } | |
2600 | ||
2601 | return 0; | |
05e343b7 LP |
2602 | } |
2603 | ||
2604 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2605 | assert(u); | |
2606 | assert(name); | |
2607 | ||
ac155bb8 | 2608 | hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 2609 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
05e343b7 LP |
2610 | } |
2611 | ||
a16e1123 LP |
2612 | bool unit_can_serialize(Unit *u) { |
2613 | assert(u); | |
2614 | ||
2615 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2616 | } | |
2617 | ||
6b78f9b4 | 2618 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2619 | int r; |
2620 | ||
2621 | assert(u); | |
2622 | assert(f); | |
2623 | assert(fds); | |
2624 | ||
9bdb98c5 LP |
2625 | if (unit_can_serialize(u)) { |
2626 | ExecRuntime *rt; | |
a16e1123 | 2627 | |
9bdb98c5 | 2628 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
2629 | if (r < 0) |
2630 | return r; | |
9bdb98c5 LP |
2631 | |
2632 | rt = unit_get_exec_runtime(u); | |
2633 | if (rt) { | |
f2341e0a | 2634 | r = exec_runtime_serialize(u, rt, f, fds); |
9bdb98c5 LP |
2635 | if (r < 0) |
2636 | return r; | |
2637 | } | |
e0209d83 MS |
2638 | } |
2639 | ||
ac155bb8 MS |
2640 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2641 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2642 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2643 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2644 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
59fccdc5 | 2645 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 2646 | |
ac155bb8 MS |
2647 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2648 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2649 | |
59fccdc5 LP |
2650 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
2651 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
2652 | ||
c2756a68 | 2653 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
5ad096b3 | 2654 | unit_serialize_item_format(u, f, "cpuacct-usage-base", "%" PRIu64, u->cpuacct_usage_base); |
c2756a68 LP |
2655 | |
2656 | if (u->cgroup_path) | |
2657 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
de1d4f9b | 2658 | unit_serialize_item(u, f, "cgroup-realized", yes_no(u->cgroup_realized)); |
c2756a68 | 2659 | |
613b411c LP |
2660 | if (serialize_jobs) { |
2661 | if (u->job) { | |
2662 | fprintf(f, "job\n"); | |
2663 | job_serialize(u->job, f, fds); | |
2664 | } | |
2665 | ||
2666 | if (u->nop_job) { | |
2667 | fprintf(f, "job\n"); | |
2668 | job_serialize(u->nop_job, f, fds); | |
2669 | } | |
2670 | } | |
2671 | ||
a16e1123 LP |
2672 | /* End marker */ |
2673 | fputc('\n', f); | |
2674 | return 0; | |
2675 | } | |
2676 | ||
2677 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2678 | va_list ap; | |
2679 | ||
2680 | assert(u); | |
2681 | assert(f); | |
2682 | assert(key); | |
2683 | assert(format); | |
2684 | ||
2685 | fputs(key, f); | |
2686 | fputc('=', f); | |
2687 | ||
2688 | va_start(ap, format); | |
2689 | vfprintf(f, format, ap); | |
2690 | va_end(ap); | |
2691 | ||
2692 | fputc('\n', f); | |
2693 | } | |
2694 | ||
2695 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2696 | assert(u); | |
2697 | assert(f); | |
2698 | assert(key); | |
2699 | assert(value); | |
2700 | ||
2701 | fprintf(f, "%s=%s\n", key, value); | |
2702 | } | |
2703 | ||
e911de99 LP |
2704 | static int unit_set_cgroup_path(Unit *u, const char *path) { |
2705 | _cleanup_free_ char *p = NULL; | |
2706 | int r; | |
2707 | ||
2708 | assert(u); | |
2709 | ||
2710 | if (path) { | |
2711 | p = strdup(path); | |
2712 | if (!p) | |
2713 | return -ENOMEM; | |
2714 | } else | |
2715 | p = NULL; | |
2716 | ||
2717 | if (streq_ptr(u->cgroup_path, p)) | |
2718 | return 0; | |
2719 | ||
2720 | if (p) { | |
2721 | r = hashmap_put(u->manager->cgroup_unit, p, u); | |
2722 | if (r < 0) | |
2723 | return r; | |
2724 | } | |
2725 | ||
2726 | if (u->cgroup_path) { | |
f2341e0a | 2727 | log_unit_debug(u, "Changing cgroup path from %s to %s.", u->cgroup_path, strna(p)); |
e911de99 LP |
2728 | hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); |
2729 | free(u->cgroup_path); | |
2730 | } | |
2731 | ||
2732 | u->cgroup_path = p; | |
2733 | p = NULL; | |
2734 | ||
2735 | return 0; | |
2736 | } | |
2737 | ||
a16e1123 | 2738 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
28b99ccd | 2739 | ExecRuntime **rt = NULL; |
9bdb98c5 | 2740 | size_t offset; |
a16e1123 LP |
2741 | int r; |
2742 | ||
2743 | assert(u); | |
2744 | assert(f); | |
2745 | assert(fds); | |
2746 | ||
613b411c LP |
2747 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2748 | if (offset > 0) | |
2749 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
2750 | ||
a16e1123 | 2751 | for (;;) { |
20c03b7b | 2752 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2753 | size_t k; |
2754 | ||
2755 | if (!fgets(line, sizeof(line), f)) { | |
2756 | if (feof(f)) | |
2757 | return 0; | |
2758 | return -errno; | |
2759 | } | |
2760 | ||
10f8e83c | 2761 | char_array_0(line); |
a16e1123 LP |
2762 | l = strstrip(line); |
2763 | ||
2764 | /* End marker */ | |
e911de99 | 2765 | if (isempty(l)) |
a16e1123 LP |
2766 | return 0; |
2767 | ||
2768 | k = strcspn(l, "="); | |
2769 | ||
2770 | if (l[k] == '=') { | |
2771 | l[k] = 0; | |
2772 | v = l+k+1; | |
2773 | } else | |
2774 | v = l+k; | |
2775 | ||
cca098b0 | 2776 | if (streq(l, "job")) { |
39a18c60 MS |
2777 | if (v[0] == '\0') { |
2778 | /* new-style serialized job */ | |
9c3349e2 LP |
2779 | Job *j; |
2780 | ||
2781 | j = job_new_raw(u); | |
39a18c60 | 2782 | if (!j) |
e911de99 | 2783 | return log_oom(); |
39a18c60 MS |
2784 | |
2785 | r = job_deserialize(j, f, fds); | |
2786 | if (r < 0) { | |
2787 | job_free(j); | |
2788 | return r; | |
2789 | } | |
cca098b0 | 2790 | |
39a18c60 MS |
2791 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2792 | if (r < 0) { | |
2793 | job_free(j); | |
2794 | return r; | |
2795 | } | |
e0209d83 MS |
2796 | |
2797 | r = job_install_deserialized(j); | |
2798 | if (r < 0) { | |
2799 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2800 | job_free(j); | |
2801 | return r; | |
2802 | } | |
ed10fa8c LP |
2803 | } else /* legacy for pre-44 */ |
2804 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); | |
cca098b0 | 2805 | continue; |
8aaf019b | 2806 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2807 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2808 | continue; |
2809 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2810 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2811 | continue; |
2812 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2813 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2814 | continue; |
2815 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2816 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2817 | continue; |
2791a8f8 | 2818 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2819 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 2820 | continue; |
59fccdc5 LP |
2821 | } else if (streq(l, "assert-timestamp")) { |
2822 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
2823 | continue; | |
2791a8f8 | 2824 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 2825 | |
e911de99 LP |
2826 | r = parse_boolean(v); |
2827 | if (r < 0) | |
f2341e0a | 2828 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 2829 | else |
e911de99 | 2830 | u->condition_result = r; |
efbac6d2 LP |
2831 | |
2832 | continue; | |
c2756a68 | 2833 | |
59fccdc5 | 2834 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 2835 | |
e911de99 LP |
2836 | r = parse_boolean(v); |
2837 | if (r < 0) | |
f2341e0a | 2838 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 2839 | else |
e911de99 | 2840 | u->assert_result = r; |
59fccdc5 LP |
2841 | |
2842 | continue; | |
2843 | ||
c2756a68 | 2844 | } else if (streq(l, "transient")) { |
c2756a68 | 2845 | |
e911de99 LP |
2846 | r = parse_boolean(v); |
2847 | if (r < 0) | |
f2341e0a | 2848 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 2849 | else |
e911de99 | 2850 | u->transient = r; |
c2756a68 LP |
2851 | |
2852 | continue; | |
e911de99 | 2853 | |
5ad096b3 LP |
2854 | } else if (streq(l, "cpuacct-usage-base")) { |
2855 | ||
2856 | r = safe_atou64(v, &u->cpuacct_usage_base); | |
2857 | if (r < 0) | |
f2341e0a | 2858 | log_unit_debug(u, "Failed to parse CPU usage %s, ignoring.", v); |
5ad096b3 | 2859 | |
0f908397 | 2860 | continue; |
4e595329 | 2861 | |
e911de99 | 2862 | } else if (streq(l, "cgroup")) { |
72673e86 | 2863 | |
e911de99 LP |
2864 | r = unit_set_cgroup_path(u, v); |
2865 | if (r < 0) | |
f2341e0a | 2866 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 2867 | |
de1d4f9b WF |
2868 | continue; |
2869 | } else if (streq(l, "cgroup-realized")) { | |
2870 | int b; | |
2871 | ||
2872 | b = parse_boolean(v); | |
2873 | if (b < 0) | |
2874 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
2875 | else | |
2876 | u->cgroup_realized = b; | |
2877 | ||
c2756a68 | 2878 | continue; |
8aaf019b | 2879 | } |
cca098b0 | 2880 | |
9bdb98c5 LP |
2881 | if (unit_can_serialize(u)) { |
2882 | if (rt) { | |
f2341e0a | 2883 | r = exec_runtime_deserialize_item(u, rt, l, v, fds); |
e911de99 | 2884 | if (r < 0) { |
f2341e0a | 2885 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); |
e911de99 LP |
2886 | continue; |
2887 | } | |
2888 | ||
2889 | /* Returns positive if key was handled by the call */ | |
9bdb98c5 LP |
2890 | if (r > 0) |
2891 | continue; | |
2892 | } | |
2893 | ||
2894 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); | |
613b411c | 2895 | if (r < 0) |
f2341e0a | 2896 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 2897 | } |
a16e1123 LP |
2898 | } |
2899 | } | |
2900 | ||
6e2ef85b LP |
2901 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2902 | Unit *device; | |
68eda4bd | 2903 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
2904 | int r; |
2905 | ||
2906 | assert(u); | |
2907 | ||
6e2ef85b | 2908 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
2909 | if (isempty(what)) |
2910 | return 0; | |
6e2ef85b | 2911 | |
8407a5d0 | 2912 | if (!is_device_path(what)) |
6e2ef85b LP |
2913 | return 0; |
2914 | ||
47bc12e1 LP |
2915 | /* When device units aren't supported (such as in a |
2916 | * container), don't create dependencies on them. */ | |
1c2e9646 | 2917 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
2918 | return 0; |
2919 | ||
7410616c LP |
2920 | r = unit_name_from_path(what, ".device", &e); |
2921 | if (r < 0) | |
2922 | return r; | |
6e2ef85b | 2923 | |
ac155bb8 | 2924 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
2925 | if (r < 0) |
2926 | return r; | |
2927 | ||
b2c23da8 | 2928 | r = unit_add_two_dependencies(u, UNIT_AFTER, u->manager->running_as == MANAGER_SYSTEM ? UNIT_BINDS_TO : UNIT_WANTS, device, true); |
faa368e3 | 2929 | if (r < 0) |
6e2ef85b LP |
2930 | return r; |
2931 | ||
faa368e3 LP |
2932 | if (wants) { |
2933 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2934 | if (r < 0) | |
6e2ef85b | 2935 | return r; |
faa368e3 | 2936 | } |
6e2ef85b LP |
2937 | |
2938 | return 0; | |
2939 | } | |
a16e1123 | 2940 | |
be847e82 | 2941 | int unit_coldplug(Unit *u) { |
cca098b0 LP |
2942 | int r; |
2943 | ||
2944 | assert(u); | |
2945 | ||
f78f265f LP |
2946 | /* Make sure we don't enter a loop, when coldplugging |
2947 | * recursively. */ | |
2948 | if (u->coldplugged) | |
2949 | return 0; | |
2950 | ||
2951 | u->coldplugged = true; | |
2952 | ||
f78f265f LP |
2953 | if (UNIT_VTABLE(u)->coldplug) { |
2954 | r = UNIT_VTABLE(u)->coldplug(u); | |
2955 | if (r < 0) | |
2956 | return r; | |
2957 | } | |
cca098b0 | 2958 | |
39a18c60 MS |
2959 | if (u->job) { |
2960 | r = job_coldplug(u->job); | |
2961 | if (r < 0) | |
2962 | return r; | |
be847e82 | 2963 | } |
cca098b0 LP |
2964 | |
2965 | return 0; | |
2966 | } | |
2967 | ||
49b1d377 | 2968 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
bcfce235 | 2969 | DISABLE_WARNING_FORMAT_NONLITERAL; |
127d5fd1 ZJS |
2970 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, |
2971 | status, unit_status_msg_format, unit_description(u)); | |
bcfce235 | 2972 | REENABLE_WARNING; |
49b1d377 MS |
2973 | } |
2974 | ||
45fb0699 | 2975 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
2976 | _cleanup_strv_free_ char **t = NULL; |
2977 | char **path; | |
1b64d026 | 2978 | struct stat st; |
ae7a7182 | 2979 | unsigned loaded_cnt, current_cnt; |
1b64d026 | 2980 | |
45fb0699 LP |
2981 | assert(u); |
2982 | ||
ac155bb8 | 2983 | if (u->fragment_path) { |
5f4b19f4 | 2984 | zero(st); |
ac155bb8 | 2985 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2986 | /* What, cannot access this anymore? */ |
2987 | return true; | |
45fb0699 | 2988 | |
ac155bb8 MS |
2989 | if (u->fragment_mtime > 0 && |
2990 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2991 | return true; |
2992 | } | |
2993 | ||
1b64d026 LP |
2994 | if (u->source_path) { |
2995 | zero(st); | |
2996 | if (stat(u->source_path, &st) < 0) | |
2997 | return true; | |
2998 | ||
2999 | if (u->source_mtime > 0 && | |
3000 | timespec_load(&st.st_mtim) != u->source_mtime) | |
3001 | return true; | |
3002 | } | |
5f4b19f4 | 3003 | |
1a7f1b38 | 3004 | (void) unit_find_dropin_paths(u, &t); |
ae7a7182 OS |
3005 | loaded_cnt = strv_length(t); |
3006 | current_cnt = strv_length(u->dropin_paths); | |
3007 | ||
3008 | if (loaded_cnt == current_cnt) { | |
3009 | if (loaded_cnt == 0) | |
3010 | return false; | |
3011 | ||
3012 | if (strv_overlap(u->dropin_paths, t)) { | |
3013 | STRV_FOREACH(path, u->dropin_paths) { | |
3014 | zero(st); | |
3015 | if (stat(*path, &st) < 0) | |
3016 | return true; | |
3017 | ||
3018 | if (u->dropin_mtime > 0 && | |
3019 | timespec_load(&st.st_mtim) > u->dropin_mtime) | |
3020 | return true; | |
3021 | } | |
3022 | ||
3023 | return false; | |
3024 | } else | |
3025 | return true; | |
3026 | } else | |
3027 | return true; | |
45fb0699 LP |
3028 | } |
3029 | ||
fdf20a31 | 3030 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3031 | assert(u); |
3032 | ||
fdf20a31 MM |
3033 | if (UNIT_VTABLE(u)->reset_failed) |
3034 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
3035 | } |
3036 | ||
a7f241db LP |
3037 | Unit *unit_following(Unit *u) { |
3038 | assert(u); | |
3039 | ||
3040 | if (UNIT_VTABLE(u)->following) | |
3041 | return UNIT_VTABLE(u)->following(u); | |
3042 | ||
3043 | return NULL; | |
3044 | } | |
3045 | ||
31afa0a4 | 3046 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3047 | assert(u); |
3048 | ||
31afa0a4 LP |
3049 | /* This call does check the current state of the unit. It's |
3050 | * hence useful to be called from state change calls of the | |
3051 | * unit itself, where the state isn't updated yet. This is | |
3052 | * different from unit_inactive_or_pending() which checks both | |
3053 | * the current state and for a queued job. */ | |
18ffdfda | 3054 | |
31afa0a4 LP |
3055 | return u->job && u->job->type == JOB_STOP; |
3056 | } | |
3057 | ||
3058 | bool unit_inactive_or_pending(Unit *u) { | |
3059 | assert(u); | |
3060 | ||
3061 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3062 | |
d956ac29 LP |
3063 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3064 | return true; | |
3065 | ||
31afa0a4 | 3066 | if (unit_stop_pending(u)) |
18ffdfda LP |
3067 | return true; |
3068 | ||
3069 | return false; | |
3070 | } | |
3071 | ||
31afa0a4 | 3072 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3073 | assert(u); |
3074 | ||
f60c2665 | 3075 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3076 | |
3077 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3078 | return true; | |
3079 | ||
ac155bb8 MS |
3080 | if (u->job && |
3081 | (u->job->type == JOB_START || | |
3082 | u->job->type == JOB_RELOAD_OR_START || | |
3083 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
3084 | return true; |
3085 | ||
3086 | return false; | |
3087 | } | |
3088 | ||
718db961 | 3089 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3090 | assert(u); |
3091 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
3092 | assert(signo > 0); |
3093 | assert(signo < _NSIG); | |
3094 | ||
8a0867d6 | 3095 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3096 | return -EOPNOTSUPP; |
8a0867d6 | 3097 | |
c74f17d9 | 3098 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3099 | } |
3100 | ||
82659fd7 LP |
3101 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
3102 | Set *pid_set; | |
3103 | int r; | |
3104 | ||
d5099efc | 3105 | pid_set = set_new(NULL); |
82659fd7 LP |
3106 | if (!pid_set) |
3107 | return NULL; | |
3108 | ||
3109 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3110 | if (main_pid > 0) { | |
3111 | r = set_put(pid_set, LONG_TO_PTR(main_pid)); | |
3112 | if (r < 0) | |
3113 | goto fail; | |
3114 | } | |
3115 | ||
3116 | if (control_pid > 0) { | |
3117 | r = set_put(pid_set, LONG_TO_PTR(control_pid)); | |
3118 | if (r < 0) | |
3119 | goto fail; | |
3120 | } | |
3121 | ||
3122 | return pid_set; | |
3123 | ||
3124 | fail: | |
3125 | set_free(pid_set); | |
3126 | return NULL; | |
3127 | } | |
3128 | ||
d91c34f2 LP |
3129 | int unit_kill_common( |
3130 | Unit *u, | |
3131 | KillWho who, | |
3132 | int signo, | |
3133 | pid_t main_pid, | |
3134 | pid_t control_pid, | |
718db961 | 3135 | sd_bus_error *error) { |
d91c34f2 | 3136 | |
814cc562 MS |
3137 | int r = 0; |
3138 | ||
52f448c3 | 3139 | if (who == KILL_MAIN) { |
814cc562 | 3140 | if (main_pid < 0) |
7358dc02 | 3141 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 3142 | else if (main_pid == 0) |
7358dc02 | 3143 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3144 | } |
3145 | ||
52f448c3 | 3146 | if (who == KILL_CONTROL) { |
814cc562 | 3147 | if (control_pid < 0) |
7358dc02 | 3148 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 3149 | else if (control_pid == 0) |
7358dc02 | 3150 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3151 | } |
3152 | ||
3153 | if (who == KILL_CONTROL || who == KILL_ALL) | |
3154 | if (control_pid > 0) | |
3155 | if (kill(control_pid, signo) < 0) | |
3156 | r = -errno; | |
3157 | ||
3158 | if (who == KILL_MAIN || who == KILL_ALL) | |
3159 | if (main_pid > 0) | |
3160 | if (kill(main_pid, signo) < 0) | |
3161 | r = -errno; | |
3162 | ||
4ad49000 | 3163 | if (who == KILL_ALL && u->cgroup_path) { |
814cc562 MS |
3164 | _cleanup_set_free_ Set *pid_set = NULL; |
3165 | int q; | |
3166 | ||
82659fd7 LP |
3167 | /* Exclude the main/control pids from being killed via the cgroup */ |
3168 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3169 | if (!pid_set) |
3170 | return -ENOMEM; | |
3171 | ||
4ad49000 | 3172 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set); |
814cc562 MS |
3173 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
3174 | r = q; | |
3175 | } | |
3176 | ||
3177 | return r; | |
3178 | } | |
3179 | ||
6210e7fc LP |
3180 | int unit_following_set(Unit *u, Set **s) { |
3181 | assert(u); | |
3182 | assert(s); | |
3183 | ||
3184 | if (UNIT_VTABLE(u)->following_set) | |
3185 | return UNIT_VTABLE(u)->following_set(u, s); | |
3186 | ||
3187 | *s = NULL; | |
3188 | return 0; | |
3189 | } | |
3190 | ||
a4375746 LP |
3191 | UnitFileState unit_get_unit_file_state(Unit *u) { |
3192 | assert(u); | |
3193 | ||
ac155bb8 MS |
3194 | if (u->unit_file_state < 0 && u->fragment_path) |
3195 | u->unit_file_state = unit_file_get_state( | |
b2c23da8 | 3196 | u->manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
2b6bf07d | 3197 | NULL, basename(u->fragment_path)); |
a4375746 | 3198 | |
ac155bb8 | 3199 | return u->unit_file_state; |
a4375746 LP |
3200 | } |
3201 | ||
d2dc52db LP |
3202 | int unit_get_unit_file_preset(Unit *u) { |
3203 | assert(u); | |
3204 | ||
3205 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3206 | u->unit_file_preset = unit_file_query_preset( | |
b2c23da8 | 3207 | u->manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
d2dc52db LP |
3208 | NULL, basename(u->fragment_path)); |
3209 | ||
3210 | return u->unit_file_preset; | |
3211 | } | |
3212 | ||
57020a3a LP |
3213 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
3214 | assert(ref); | |
3215 | assert(u); | |
3216 | ||
3217 | if (ref->unit) | |
3218 | unit_ref_unset(ref); | |
3219 | ||
3220 | ref->unit = u; | |
71fda00f | 3221 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
3222 | return u; |
3223 | } | |
3224 | ||
3225 | void unit_ref_unset(UnitRef *ref) { | |
3226 | assert(ref); | |
3227 | ||
3228 | if (!ref->unit) | |
3229 | return; | |
3230 | ||
71fda00f | 3231 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
3232 | ref->unit = NULL; |
3233 | } | |
3234 | ||
598459ce LP |
3235 | int unit_patch_contexts(Unit *u) { |
3236 | CGroupContext *cc; | |
3237 | ExecContext *ec; | |
cba6e062 LP |
3238 | unsigned i; |
3239 | int r; | |
3240 | ||
e06c73cc | 3241 | assert(u); |
e06c73cc | 3242 | |
598459ce LP |
3243 | /* Patch in the manager defaults into the exec and cgroup |
3244 | * contexts, _after_ the rest of the settings have been | |
3245 | * initialized */ | |
085afe36 | 3246 | |
598459ce LP |
3247 | ec = unit_get_exec_context(u); |
3248 | if (ec) { | |
3249 | /* This only copies in the ones that need memory */ | |
3250 | for (i = 0; i < _RLIMIT_MAX; i++) | |
3251 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
3252 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
3253 | if (!ec->rlimit[i]) | |
3254 | return -ENOMEM; | |
3255 | } | |
3256 | ||
b2c23da8 | 3257 | if (u->manager->running_as == MANAGER_USER && |
598459ce LP |
3258 | !ec->working_directory) { |
3259 | ||
3260 | r = get_home_dir(&ec->working_directory); | |
3261 | if (r < 0) | |
3262 | return r; | |
4c08c824 LP |
3263 | |
3264 | /* Allow user services to run, even if the | |
3265 | * home directory is missing */ | |
3266 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
3267 | } |
3268 | ||
b2c23da8 | 3269 | if (u->manager->running_as == MANAGER_USER && |
598459ce LP |
3270 | (ec->syscall_whitelist || |
3271 | !set_isempty(ec->syscall_filter) || | |
3272 | !set_isempty(ec->syscall_archs) || | |
3273 | ec->address_families_whitelist || | |
3274 | !set_isempty(ec->address_families))) | |
3275 | ec->no_new_privileges = true; | |
e06c73cc | 3276 | |
598459ce LP |
3277 | if (ec->private_devices) |
3278 | ec->capability_bounding_set_drop |= (uint64_t) 1ULL << (uint64_t) CAP_MKNOD; | |
cba6e062 LP |
3279 | } |
3280 | ||
598459ce LP |
3281 | cc = unit_get_cgroup_context(u); |
3282 | if (cc) { | |
f513e420 | 3283 | |
598459ce LP |
3284 | if (ec && |
3285 | ec->private_devices && | |
3286 | cc->device_policy == CGROUP_AUTO) | |
3287 | cc->device_policy = CGROUP_CLOSED; | |
3288 | } | |
f1660f96 | 3289 | |
cba6e062 | 3290 | return 0; |
e06c73cc LP |
3291 | } |
3292 | ||
3ef63c31 LP |
3293 | ExecContext *unit_get_exec_context(Unit *u) { |
3294 | size_t offset; | |
3295 | assert(u); | |
3296 | ||
598459ce LP |
3297 | if (u->type < 0) |
3298 | return NULL; | |
3299 | ||
3ef63c31 LP |
3300 | offset = UNIT_VTABLE(u)->exec_context_offset; |
3301 | if (offset <= 0) | |
3302 | return NULL; | |
3303 | ||
3304 | return (ExecContext*) ((uint8_t*) u + offset); | |
3305 | } | |
3306 | ||
718db961 LP |
3307 | KillContext *unit_get_kill_context(Unit *u) { |
3308 | size_t offset; | |
3309 | assert(u); | |
3310 | ||
598459ce LP |
3311 | if (u->type < 0) |
3312 | return NULL; | |
3313 | ||
718db961 LP |
3314 | offset = UNIT_VTABLE(u)->kill_context_offset; |
3315 | if (offset <= 0) | |
3316 | return NULL; | |
3317 | ||
3318 | return (KillContext*) ((uint8_t*) u + offset); | |
3319 | } | |
3320 | ||
4ad49000 LP |
3321 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
3322 | size_t offset; | |
3323 | ||
598459ce LP |
3324 | if (u->type < 0) |
3325 | return NULL; | |
3326 | ||
4ad49000 LP |
3327 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
3328 | if (offset <= 0) | |
3329 | return NULL; | |
3330 | ||
3331 | return (CGroupContext*) ((uint8_t*) u + offset); | |
3332 | } | |
3333 | ||
613b411c LP |
3334 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
3335 | size_t offset; | |
3336 | ||
598459ce LP |
3337 | if (u->type < 0) |
3338 | return NULL; | |
3339 | ||
613b411c LP |
3340 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
3341 | if (offset <= 0) | |
3342 | return NULL; | |
3343 | ||
3344 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
3345 | } | |
3346 | ||
29686440 | 3347 | static int unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode, bool transient, char **dir) { |
3f5e8115 LP |
3348 | assert(u); |
3349 | ||
b2c23da8 | 3350 | if (u->manager->running_as == MANAGER_USER) { |
29686440 | 3351 | int r; |
26d04f86 | 3352 | |
718880ba SA |
3353 | if (mode == UNIT_PERSISTENT && !transient) |
3354 | r = user_config_home(dir); | |
3355 | else | |
4d5dec23 | 3356 | r = user_runtime_dir(dir); |
26d04f86 LP |
3357 | if (r == 0) |
3358 | return -ENOENT; | |
3f5e8115 | 3359 | |
29686440 ZJS |
3360 | return r; |
3361 | } | |
26d04f86 | 3362 | |
29686440 ZJS |
3363 | if (mode == UNIT_PERSISTENT && !transient) |
3364 | *dir = strdup("/etc/systemd/system"); | |
8e2af478 | 3365 | else |
29686440 ZJS |
3366 | *dir = strdup("/run/systemd/system"); |
3367 | if (!*dir) | |
71645aca LP |
3368 | return -ENOMEM; |
3369 | ||
26d04f86 | 3370 | return 0; |
71645aca LP |
3371 | } |
3372 | ||
3f5e8115 | 3373 | static int unit_drop_in_file(Unit *u, UnitSetPropertiesMode mode, const char *name, char **p, char **q) { |
29686440 ZJS |
3374 | _cleanup_free_ char *dir = NULL; |
3375 | int r; | |
3376 | ||
3377 | assert(u); | |
3378 | ||
3379 | r = unit_drop_in_dir(u, mode, u->transient, &dir); | |
3380 | if (r < 0) | |
3381 | return r; | |
3382 | ||
8eea8687 | 3383 | return drop_in_file(dir, u->id, 50, name, p, q); |
29686440 ZJS |
3384 | } |
3385 | ||
8e2af478 | 3386 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
29686440 | 3387 | |
adb76a70 | 3388 | _cleanup_free_ char *dir = NULL, *p = NULL, *q = NULL; |
26d04f86 | 3389 | int r; |
71645aca LP |
3390 | |
3391 | assert(u); | |
3392 | ||
6d235724 | 3393 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3394 | return 0; |
3395 | ||
29686440 | 3396 | r = unit_drop_in_dir(u, mode, u->transient, &dir); |
26d04f86 LP |
3397 | if (r < 0) |
3398 | return r; | |
71645aca | 3399 | |
adb76a70 WC |
3400 | r = write_drop_in(dir, u->id, 50, name, data); |
3401 | if (r < 0) | |
3402 | return r; | |
3403 | ||
3404 | r = drop_in_file(dir, u->id, 50, name, &p, &q); | |
3405 | if (r < 0) | |
3406 | return r; | |
3407 | ||
3408 | r = strv_extend(&u->dropin_paths, q); | |
3409 | if (r < 0) | |
3410 | return r; | |
3411 | ||
3412 | strv_sort(u->dropin_paths); | |
3413 | strv_uniq(u->dropin_paths); | |
3414 | ||
3415 | u->dropin_mtime = now(CLOCK_REALTIME); | |
3416 | ||
3417 | return 0; | |
26d04f86 | 3418 | } |
71645aca | 3419 | |
b9ec9359 LP |
3420 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3421 | _cleanup_free_ char *p = NULL; | |
3422 | va_list ap; | |
3423 | int r; | |
3424 | ||
3425 | assert(u); | |
3426 | assert(name); | |
3427 | assert(format); | |
3428 | ||
6d235724 | 3429 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3430 | return 0; |
3431 | ||
3432 | va_start(ap, format); | |
3433 | r = vasprintf(&p, format, ap); | |
3434 | va_end(ap); | |
3435 | ||
3436 | if (r < 0) | |
3437 | return -ENOMEM; | |
3438 | ||
3439 | return unit_write_drop_in(u, mode, name, p); | |
3440 | } | |
3441 | ||
3442 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
b42defe3 LP |
3443 | _cleanup_free_ char *ndata = NULL; |
3444 | ||
3445 | assert(u); | |
3446 | assert(name); | |
3447 | assert(data); | |
3448 | ||
3449 | if (!UNIT_VTABLE(u)->private_section) | |
3450 | return -EINVAL; | |
3451 | ||
6d235724 | 3452 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3453 | return 0; |
3454 | ||
b42defe3 LP |
3455 | ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL); |
3456 | if (!ndata) | |
3457 | return -ENOMEM; | |
3458 | ||
3459 | return unit_write_drop_in(u, mode, name, ndata); | |
3460 | } | |
3461 | ||
b9ec9359 LP |
3462 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3463 | _cleanup_free_ char *p = NULL; | |
3464 | va_list ap; | |
3465 | int r; | |
3466 | ||
3467 | assert(u); | |
3468 | assert(name); | |
3469 | assert(format); | |
3470 | ||
6d235724 | 3471 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3472 | return 0; |
3473 | ||
3474 | va_start(ap, format); | |
3475 | r = vasprintf(&p, format, ap); | |
3476 | va_end(ap); | |
3477 | ||
3478 | if (r < 0) | |
3479 | return -ENOMEM; | |
3480 | ||
3481 | return unit_write_drop_in_private(u, mode, name, p); | |
3482 | } | |
3483 | ||
8e2af478 | 3484 | int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) { |
26d04f86 LP |
3485 | _cleanup_free_ char *p = NULL, *q = NULL; |
3486 | int r; | |
71645aca | 3487 | |
26d04f86 | 3488 | assert(u); |
71645aca | 3489 | |
6d235724 | 3490 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3491 | return 0; |
3492 | ||
29686440 | 3493 | r = unit_drop_in_file(u, mode, name, &p, &q); |
6891529f ZJS |
3494 | if (r < 0) |
3495 | return r; | |
3496 | ||
71645aca | 3497 | if (unlink(q) < 0) |
241da328 | 3498 | r = errno == ENOENT ? 0 : -errno; |
26d04f86 | 3499 | else |
241da328 | 3500 | r = 1; |
71645aca LP |
3501 | |
3502 | rmdir(p); | |
26d04f86 | 3503 | return r; |
71645aca LP |
3504 | } |
3505 | ||
c2756a68 | 3506 | int unit_make_transient(Unit *u) { |
c2756a68 LP |
3507 | assert(u); |
3508 | ||
3f5e8115 LP |
3509 | if (!UNIT_VTABLE(u)->can_transient) |
3510 | return -EOPNOTSUPP; | |
3511 | ||
c2756a68 LP |
3512 | u->load_state = UNIT_STUB; |
3513 | u->load_error = 0; | |
3514 | u->transient = true; | |
3f5e8115 | 3515 | u->fragment_path = mfree(u->fragment_path); |
c2756a68 | 3516 | |
3f5e8115 | 3517 | return 0; |
c2756a68 LP |
3518 | } |
3519 | ||
cd2086fe LP |
3520 | int unit_kill_context( |
3521 | Unit *u, | |
3522 | KillContext *c, | |
db2cb23b | 3523 | KillOperation k, |
cd2086fe LP |
3524 | pid_t main_pid, |
3525 | pid_t control_pid, | |
3526 | bool main_pid_alien) { | |
3527 | ||
bc6aed7b | 3528 | int sig, wait_for_exit = false, r; |
cd2086fe LP |
3529 | |
3530 | assert(u); | |
3531 | assert(c); | |
3532 | ||
3533 | if (c->kill_mode == KILL_NONE) | |
3534 | return 0; | |
3535 | ||
db2cb23b UTL |
3536 | switch (k) { |
3537 | case KILL_KILL: | |
3538 | sig = SIGKILL; | |
3539 | break; | |
3540 | case KILL_ABORT: | |
3541 | sig = SIGABRT; | |
3542 | break; | |
3543 | case KILL_TERMINATE: | |
3544 | sig = c->kill_signal; | |
3545 | break; | |
3546 | default: | |
3547 | assert_not_reached("KillOperation unknown"); | |
3548 | } | |
cd2086fe LP |
3549 | |
3550 | if (main_pid > 0) { | |
3551 | r = kill_and_sigcont(main_pid, sig); | |
3552 | ||
3553 | if (r < 0 && r != -ESRCH) { | |
3554 | _cleanup_free_ char *comm = NULL; | |
3555 | get_process_comm(main_pid, &comm); | |
3556 | ||
f2341e0a | 3557 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s): %m", main_pid, strna(comm)); |
82659fd7 | 3558 | } else { |
bc6aed7b LP |
3559 | if (!main_pid_alien) |
3560 | wait_for_exit = true; | |
82659fd7 | 3561 | |
db2cb23b | 3562 | if (c->send_sighup && k != KILL_KILL) |
82659fd7 LP |
3563 | kill(main_pid, SIGHUP); |
3564 | } | |
cd2086fe LP |
3565 | } |
3566 | ||
3567 | if (control_pid > 0) { | |
3568 | r = kill_and_sigcont(control_pid, sig); | |
3569 | ||
3570 | if (r < 0 && r != -ESRCH) { | |
3571 | _cleanup_free_ char *comm = NULL; | |
3572 | get_process_comm(control_pid, &comm); | |
3573 | ||
f2341e0a | 3574 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s): %m", control_pid, strna(comm)); |
82659fd7 | 3575 | } else { |
cd2086fe | 3576 | wait_for_exit = true; |
82659fd7 | 3577 | |
db2cb23b | 3578 | if (c->send_sighup && k != KILL_KILL) |
82659fd7 LP |
3579 | kill(control_pid, SIGHUP); |
3580 | } | |
cd2086fe LP |
3581 | } |
3582 | ||
db2cb23b | 3583 | if ((c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL)) && u->cgroup_path) { |
cd2086fe LP |
3584 | _cleanup_set_free_ Set *pid_set = NULL; |
3585 | ||
82659fd7 LP |
3586 | /* Exclude the main/control pids from being killed via the cgroup */ |
3587 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
3588 | if (!pid_set) |
3589 | return -ENOMEM; | |
3590 | ||
4ad49000 | 3591 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, true, false, pid_set); |
cd2086fe LP |
3592 | if (r < 0) { |
3593 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
f2341e0a | 3594 | log_unit_warning_errno(u, r, "Failed to kill control group: %m"); |
82659fd7 | 3595 | } else if (r > 0) { |
bc6aed7b | 3596 | |
743970d2 | 3597 | /* FIXME: For now, we will not wait for the |
e9db43d5 LP |
3598 | * cgroup members to die if we are running in |
3599 | * a container or if this is a delegation | |
3600 | * unit, simply because cgroup notification is | |
3601 | * unreliable in these cases. It doesn't work | |
3602 | * at all in containers, and outside of | |
3603 | * containers it can be confused easily by | |
3604 | * left-over directories in the cgroup -- | |
3605 | * which however should not exist in | |
3606 | * non-delegated units. */ | |
3607 | ||
3608 | if (detect_container(NULL) == 0 && !unit_cgroup_delegate(u)) | |
3609 | wait_for_exit = true; | |
58ea275a | 3610 | |
db2cb23b | 3611 | if (c->send_sighup && k != KILL_KILL) { |
82659fd7 LP |
3612 | set_free(pid_set); |
3613 | ||
3614 | pid_set = unit_pid_set(main_pid, control_pid); | |
3615 | if (!pid_set) | |
3616 | return -ENOMEM; | |
3617 | ||
8190da36 | 3618 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, false, true, false, pid_set); |
82659fd7 LP |
3619 | } |
3620 | } | |
cd2086fe LP |
3621 | } |
3622 | ||
3623 | return wait_for_exit; | |
3624 | } | |
3625 | ||
a57f7e2c LP |
3626 | int unit_require_mounts_for(Unit *u, const char *path) { |
3627 | char prefix[strlen(path) + 1], *p; | |
3628 | int r; | |
3629 | ||
3630 | assert(u); | |
3631 | assert(path); | |
3632 | ||
3633 | /* Registers a unit for requiring a certain path and all its | |
3634 | * prefixes. We keep a simple array of these paths in the | |
3635 | * unit, since its usually short. However, we build a prefix | |
3636 | * table for all possible prefixes so that new appearing mount | |
3637 | * units can easily determine which units to make themselves a | |
3638 | * dependency of. */ | |
3639 | ||
70b64bd3 ZJS |
3640 | if (!path_is_absolute(path)) |
3641 | return -EINVAL; | |
3642 | ||
a57f7e2c LP |
3643 | p = strdup(path); |
3644 | if (!p) | |
3645 | return -ENOMEM; | |
3646 | ||
3647 | path_kill_slashes(p); | |
3648 | ||
a57f7e2c LP |
3649 | if (!path_is_safe(p)) { |
3650 | free(p); | |
3651 | return -EPERM; | |
3652 | } | |
3653 | ||
3654 | if (strv_contains(u->requires_mounts_for, p)) { | |
3655 | free(p); | |
3656 | return 0; | |
3657 | } | |
3658 | ||
6e18964d ZJS |
3659 | r = strv_consume(&u->requires_mounts_for, p); |
3660 | if (r < 0) | |
a57f7e2c | 3661 | return r; |
a57f7e2c LP |
3662 | |
3663 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
3664 | Set *x; | |
3665 | ||
3666 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
3667 | if (!x) { | |
3668 | char *q; | |
3669 | ||
742f41ad LP |
3670 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &string_hash_ops); |
3671 | if (r < 0) | |
3672 | return r; | |
a57f7e2c LP |
3673 | |
3674 | q = strdup(prefix); | |
3675 | if (!q) | |
3676 | return -ENOMEM; | |
3677 | ||
d5099efc | 3678 | x = set_new(NULL); |
a57f7e2c LP |
3679 | if (!x) { |
3680 | free(q); | |
3681 | return -ENOMEM; | |
3682 | } | |
3683 | ||
3684 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
3685 | if (r < 0) { | |
3686 | free(q); | |
3687 | set_free(x); | |
3688 | return r; | |
3689 | } | |
3690 | } | |
3691 | ||
3692 | r = set_put(x, u); | |
3693 | if (r < 0) | |
3694 | return r; | |
3695 | } | |
3696 | ||
3697 | return 0; | |
3698 | } | |
3699 | ||
613b411c LP |
3700 | int unit_setup_exec_runtime(Unit *u) { |
3701 | ExecRuntime **rt; | |
3702 | size_t offset; | |
3703 | Iterator i; | |
3704 | Unit *other; | |
3705 | ||
3706 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3707 | assert(offset > 0); | |
3708 | ||
06b643e7 | 3709 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
3710 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
3711 | if (*rt) | |
3712 | return 0; | |
3713 | ||
3714 | /* Try to get it from somebody else */ | |
3715 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
3716 | ||
3717 | *rt = unit_get_exec_runtime(other); | |
3718 | if (*rt) { | |
3719 | exec_runtime_ref(*rt); | |
3720 | return 0; | |
3721 | } | |
3722 | } | |
3723 | ||
3724 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
3725 | } | |
3726 | ||
1c2e9646 LP |
3727 | bool unit_type_supported(UnitType t) { |
3728 | if (_unlikely_(t < 0)) | |
3729 | return false; | |
3730 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
3731 | return false; | |
3732 | ||
3733 | if (!unit_vtable[t]->supported) | |
3734 | return true; | |
3735 | ||
3736 | return unit_vtable[t]->supported(); | |
3737 | } | |
3738 | ||
8b4305c7 LP |
3739 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
3740 | int r; | |
3741 | ||
3742 | assert(u); | |
3743 | assert(where); | |
3744 | ||
3745 | r = dir_is_empty(where); | |
3746 | if (r > 0) | |
3747 | return; | |
3748 | if (r < 0) { | |
3749 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
3750 | return; | |
3751 | } | |
3752 | ||
3753 | log_struct(LOG_NOTICE, | |
3754 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3755 | LOG_UNIT_ID(u), | |
3756 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
3757 | "WHERE=%s", where, | |
3758 | NULL); | |
3759 | } | |
3760 | ||
3761 | int unit_fail_if_symlink(Unit *u, const char* where) { | |
3762 | int r; | |
3763 | ||
3764 | assert(u); | |
3765 | assert(where); | |
3766 | ||
3767 | r = is_symlink(where); | |
3768 | if (r < 0) { | |
3769 | log_unit_debug_errno(u, r, "Failed to check symlink %s, ignoring: %m", where); | |
3770 | return 0; | |
3771 | } | |
3772 | if (r == 0) | |
3773 | return 0; | |
3774 | ||
3775 | log_struct(LOG_ERR, | |
3776 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3777 | LOG_UNIT_ID(u), | |
3778 | LOG_UNIT_MESSAGE(u, "Mount on symlink %s not allowed.", where), | |
3779 | "WHERE=%s", where, | |
3780 | NULL); | |
3781 | ||
3782 | return -ELOOP; | |
3783 | } | |
3784 | ||
94f04347 LP |
3785 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
3786 | [UNIT_ACTIVE] = "active", | |
032ff4af | 3787 | [UNIT_RELOADING] = "reloading", |
94f04347 | 3788 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 3789 | [UNIT_FAILED] = "failed", |
94f04347 LP |
3790 | [UNIT_ACTIVATING] = "activating", |
3791 | [UNIT_DEACTIVATING] = "deactivating" | |
3792 | }; | |
3793 | ||
3794 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); |