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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a7334b09 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2010 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
8 | under the terms of the GNU Lesser General Public License as published by |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
10 | (at your option) any later version. |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 15 | Lesser General Public License for more details. |
a7334b09 | 16 | |
5430f7f2 | 17 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
19 | ***/ | |
20 | ||
87f0e418 | 21 | #include <errno.h> |
0301abf4 | 22 | #include <stdlib.h> |
4f5dd394 | 23 | #include <string.h> |
45fb0699 | 24 | #include <sys/stat.h> |
4f5dd394 | 25 | #include <unistd.h> |
87f0e418 | 26 | |
718db961 LP |
27 | #include "sd-id128.h" |
28 | #include "sd-messages.h" | |
4f5dd394 | 29 | |
b5efdb8a | 30 | #include "alloc-util.h" |
4f5dd394 LP |
31 | #include "bus-common-errors.h" |
32 | #include "bus-util.h" | |
c6c18be3 | 33 | #include "cgroup-util.h" |
4f5dd394 LP |
34 | #include "dbus-unit.h" |
35 | #include "dbus.h" | |
36 | #include "dropin.h" | |
37 | #include "escape.h" | |
38 | #include "execute.h" | |
6a48d82f | 39 | #include "fd-util.h" |
a5c32cff | 40 | #include "fileio-label.h" |
f97b34a6 | 41 | #include "format-util.h" |
d3070fbd | 42 | #include "fs-util.h" |
4b58153d | 43 | #include "id128-util.h" |
915b1d01 | 44 | #include "io-util.h" |
4f5dd394 LP |
45 | #include "load-dropin.h" |
46 | #include "load-fragment.h" | |
47 | #include "log.h" | |
48 | #include "macro.h" | |
49 | #include "missing.h" | |
50 | #include "mkdir.h" | |
6bedfcbb | 51 | #include "parse-util.h" |
4f5dd394 | 52 | #include "path-util.h" |
0b452006 | 53 | #include "process-util.h" |
4f5dd394 | 54 | #include "set.h" |
6eb7c172 | 55 | #include "signal-util.h" |
d3070fbd | 56 | #include "sparse-endian.h" |
e9db43d5 | 57 | #include "special.h" |
8fcde012 | 58 | #include "stat-util.h" |
d054f0a4 | 59 | #include "stdio-util.h" |
5afe510c | 60 | #include "string-table.h" |
07630cea | 61 | #include "string-util.h" |
4f5dd394 | 62 | #include "strv.h" |
4f4afc88 | 63 | #include "umask-util.h" |
4f5dd394 | 64 | #include "unit-name.h" |
e9db43d5 | 65 | #include "unit.h" |
b1d4f8e1 LP |
66 | #include "user-util.h" |
67 | #include "virt.h" | |
87f0e418 LP |
68 | |
69 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
70 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 LP |
71 | [UNIT_SOCKET] = &socket_vtable, |
72 | [UNIT_TARGET] = &target_vtable, | |
73 | [UNIT_DEVICE] = &device_vtable, | |
74 | [UNIT_MOUNT] = &mount_vtable, | |
75 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 76 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 77 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 78 | [UNIT_PATH] = &path_vtable, |
6c12b52e | 79 | [UNIT_SLICE] = &slice_vtable, |
5afe510c | 80 | [UNIT_SCOPE] = &scope_vtable, |
87f0e418 LP |
81 | }; |
82 | ||
f2341e0a | 83 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 84 | |
7d17cfbc | 85 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
86 | Unit *u; |
87 | ||
88 | assert(m); | |
ac155bb8 | 89 | assert(size >= sizeof(Unit)); |
87f0e418 | 90 | |
7d17cfbc MS |
91 | u = malloc0(size); |
92 | if (!u) | |
87f0e418 LP |
93 | return NULL; |
94 | ||
d5099efc | 95 | u->names = set_new(&string_hash_ops); |
6b430fdb ZJS |
96 | if (!u->names) |
97 | return mfree(u); | |
87f0e418 | 98 | |
ac155bb8 MS |
99 | u->manager = m; |
100 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
101 | u->default_dependencies = true; |
102 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 103 | u->unit_file_preset = -1; |
d420282b | 104 | u->on_failure_job_mode = JOB_REPLACE; |
efdb0237 | 105 | u->cgroup_inotify_wd = -1; |
36c16a7c | 106 | u->job_timeout = USEC_INFINITY; |
a2df3ea4 | 107 | u->job_running_timeout = USEC_INFINITY; |
00d9ef85 LP |
108 | u->ref_uid = UID_INVALID; |
109 | u->ref_gid = GID_INVALID; | |
fe700f46 | 110 | u->cpu_usage_last = NSEC_INFINITY; |
87f0e418 | 111 | |
6a48d82f DM |
112 | u->ip_accounting_ingress_map_fd = -1; |
113 | u->ip_accounting_egress_map_fd = -1; | |
114 | u->ipv4_allow_map_fd = -1; | |
115 | u->ipv6_allow_map_fd = -1; | |
116 | u->ipv4_deny_map_fd = -1; | |
117 | u->ipv6_deny_map_fd = -1; | |
118 | ||
6bf0f408 | 119 | RATELIMIT_INIT(u->start_limit, m->default_start_limit_interval, m->default_start_limit_burst); |
67bfdc97 | 120 | RATELIMIT_INIT(u->auto_stop_ratelimit, 10 * USEC_PER_SEC, 16); |
bea355da | 121 | |
87f0e418 LP |
122 | return u; |
123 | } | |
124 | ||
a581e45a LP |
125 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
126 | Unit *u; | |
127 | int r; | |
128 | ||
129 | u = unit_new(m, size); | |
130 | if (!u) | |
131 | return -ENOMEM; | |
132 | ||
133 | r = unit_add_name(u, name); | |
134 | if (r < 0) { | |
135 | unit_free(u); | |
136 | return r; | |
137 | } | |
138 | ||
139 | *ret = u; | |
140 | return r; | |
141 | } | |
142 | ||
f278026d LP |
143 | bool unit_has_name(Unit *u, const char *name) { |
144 | assert(u); | |
145 | assert(name); | |
146 | ||
390bc2b1 | 147 | return set_contains(u->names, (char*) name); |
f278026d LP |
148 | } |
149 | ||
598459ce LP |
150 | static void unit_init(Unit *u) { |
151 | CGroupContext *cc; | |
152 | ExecContext *ec; | |
153 | KillContext *kc; | |
154 | ||
155 | assert(u); | |
156 | assert(u->manager); | |
157 | assert(u->type >= 0); | |
158 | ||
159 | cc = unit_get_cgroup_context(u); | |
160 | if (cc) { | |
161 | cgroup_context_init(cc); | |
162 | ||
163 | /* Copy in the manager defaults into the cgroup | |
164 | * context, _before_ the rest of the settings have | |
165 | * been initialized */ | |
166 | ||
167 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
13c31542 | 168 | cc->io_accounting = u->manager->default_io_accounting; |
377bfd2d | 169 | cc->ip_accounting = u->manager->default_ip_accounting; |
598459ce LP |
170 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
171 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 172 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
6a48d82f | 173 | cc->ip_accounting = u->manager->default_ip_accounting; |
0af20ea2 LP |
174 | |
175 | if (u->type != UNIT_SLICE) | |
176 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
177 | } |
178 | ||
179 | ec = unit_get_exec_context(u); | |
b1edf445 | 180 | if (ec) { |
598459ce LP |
181 | exec_context_init(ec); |
182 | ||
b1edf445 LP |
183 | ec->keyring_mode = MANAGER_IS_SYSTEM(u->manager) ? |
184 | EXEC_KEYRING_PRIVATE : EXEC_KEYRING_INHERIT; | |
185 | } | |
186 | ||
598459ce LP |
187 | kc = unit_get_kill_context(u); |
188 | if (kc) | |
189 | kill_context_init(kc); | |
190 | ||
191 | if (UNIT_VTABLE(u)->init) | |
192 | UNIT_VTABLE(u)->init(u); | |
193 | } | |
194 | ||
87f0e418 | 195 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 196 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 197 | UnitType t; |
87f0e418 LP |
198 | int r; |
199 | ||
200 | assert(u); | |
201 | assert(text); | |
202 | ||
7410616c | 203 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 204 | |
ac155bb8 | 205 | if (!u->instance) |
9e2f7c11 | 206 | return -EINVAL; |
87f0e418 | 207 | |
7410616c LP |
208 | r = unit_name_replace_instance(text, u->instance, &s); |
209 | if (r < 0) | |
210 | return r; | |
211 | } else { | |
9e2f7c11 | 212 | s = strdup(text); |
7410616c LP |
213 | if (!s) |
214 | return -ENOMEM; | |
215 | } | |
87f0e418 | 216 | |
7410616c LP |
217 | if (set_contains(u->names, s)) |
218 | return 0; | |
219 | if (hashmap_contains(u->manager->units, s)) | |
220 | return -EEXIST; | |
221 | ||
222 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 223 | return -EINVAL; |
e537352b | 224 | |
7410616c LP |
225 | t = unit_name_to_type(s); |
226 | if (t < 0) | |
227 | return -EINVAL; | |
87f0e418 | 228 | |
598459ce LP |
229 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
230 | return -EINVAL; | |
87f0e418 | 231 | |
e48614c4 ZJS |
232 | r = unit_name_to_instance(s, &i); |
233 | if (r < 0) | |
598459ce | 234 | return r; |
87f0e418 | 235 | |
ce99c68a | 236 | if (i && !unit_type_may_template(t)) |
598459ce | 237 | return -EINVAL; |
9e2f7c11 | 238 | |
276c3e78 | 239 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
240 | * but not both. Note that we do allow names with different |
241 | * instance names however! */ | |
598459ce LP |
242 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
243 | return -EINVAL; | |
9e2f7c11 | 244 | |
8a993b61 | 245 | if (!unit_type_may_alias(t) && !set_isempty(u->names)) |
598459ce | 246 | return -EEXIST; |
9e2f7c11 | 247 | |
598459ce LP |
248 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
249 | return -E2BIG; | |
4f0f902f | 250 | |
e48614c4 | 251 | r = set_put(u->names, s); |
7410616c | 252 | if (r < 0) |
598459ce | 253 | return r; |
7410616c | 254 | assert(r > 0); |
87f0e418 | 255 | |
e48614c4 ZJS |
256 | r = hashmap_put(u->manager->units, s, u); |
257 | if (r < 0) { | |
7410616c | 258 | (void) set_remove(u->names, s); |
598459ce | 259 | return r; |
87f0e418 LP |
260 | } |
261 | ||
ac155bb8 | 262 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
263 | u->type = t; |
264 | u->id = s; | |
265 | u->instance = i; | |
9e2f7c11 | 266 | |
71fda00f | 267 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 268 | |
598459ce | 269 | unit_init(u); |
87f0e418 | 270 | |
598459ce LP |
271 | i = NULL; |
272 | } | |
9e2f7c11 | 273 | |
598459ce | 274 | s = NULL; |
9e2f7c11 | 275 | |
598459ce LP |
276 | unit_add_to_dbus_queue(u); |
277 | return 0; | |
87f0e418 LP |
278 | } |
279 | ||
0ae97ec1 | 280 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 281 | _cleanup_free_ char *t = NULL; |
598459ce | 282 | char *s, *i; |
276c3e78 | 283 | int r; |
0ae97ec1 LP |
284 | |
285 | assert(u); | |
286 | assert(name); | |
287 | ||
7410616c | 288 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 289 | |
ac155bb8 | 290 | if (!u->instance) |
9e2f7c11 LP |
291 | return -EINVAL; |
292 | ||
7410616c LP |
293 | r = unit_name_replace_instance(name, u->instance, &t); |
294 | if (r < 0) | |
295 | return r; | |
9e2f7c11 LP |
296 | |
297 | name = t; | |
298 | } | |
299 | ||
0ae97ec1 | 300 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 301 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 302 | if (!s) |
0ae97ec1 LP |
303 | return -ENOENT; |
304 | ||
7410616c | 305 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
306 | r = unit_name_to_instance(s, &i); |
307 | if (r < 0) | |
276c3e78 LP |
308 | return r; |
309 | ||
ac155bb8 | 310 | u->id = s; |
276c3e78 | 311 | |
ac155bb8 MS |
312 | free(u->instance); |
313 | u->instance = i; | |
276c3e78 | 314 | |
c1e1601e | 315 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 316 | |
0ae97ec1 LP |
317 | return 0; |
318 | } | |
319 | ||
f50e0a01 | 320 | int unit_set_description(Unit *u, const char *description) { |
84b26d51 | 321 | int r; |
f50e0a01 LP |
322 | |
323 | assert(u); | |
324 | ||
84b26d51 LP |
325 | r = free_and_strdup(&u->description, empty_to_null(description)); |
326 | if (r < 0) | |
327 | return r; | |
328 | if (r > 0) | |
329 | unit_add_to_dbus_queue(u); | |
c1e1601e | 330 | |
f50e0a01 LP |
331 | return 0; |
332 | } | |
333 | ||
701cc384 | 334 | bool unit_check_gc(Unit *u) { |
a354329f | 335 | UnitActiveState state; |
5afe510c | 336 | |
701cc384 LP |
337 | assert(u); |
338 | ||
5afe510c LP |
339 | /* Checks whether the unit is ready to be unloaded for garbage collection. Returns true, when the unit shall |
340 | * stay around, false if there's no reason to keep it loaded. */ | |
341 | ||
a354329f | 342 | if (u->job) |
701cc384 LP |
343 | return true; |
344 | ||
a354329f | 345 | if (u->nop_job) |
6c073082 LP |
346 | return true; |
347 | ||
a354329f LP |
348 | state = unit_active_state(u); |
349 | ||
7eb2a8a1 | 350 | /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */ |
a354329f LP |
351 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && |
352 | UNIT_VTABLE(u)->release_resources) | |
7eb2a8a1 | 353 | UNIT_VTABLE(u)->release_resources(u); |
a354329f | 354 | |
f5869324 | 355 | if (u->perpetual) |
701cc384 LP |
356 | return true; |
357 | ||
9d576438 LP |
358 | if (u->refs) |
359 | return true; | |
360 | ||
05a98afd LP |
361 | if (sd_bus_track_count(u->bus_track) > 0) |
362 | return true; | |
363 | ||
5afe510c LP |
364 | /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */ |
365 | switch (u->collect_mode) { | |
366 | ||
367 | case COLLECT_INACTIVE: | |
368 | if (state != UNIT_INACTIVE) | |
369 | return true; | |
370 | ||
371 | break; | |
372 | ||
373 | case COLLECT_INACTIVE_OR_FAILED: | |
374 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
375 | return true; | |
376 | ||
377 | break; | |
378 | ||
379 | default: | |
380 | assert_not_reached("Unknown garbage collection mode"); | |
381 | } | |
382 | ||
701cc384 LP |
383 | if (UNIT_VTABLE(u)->check_gc) |
384 | if (UNIT_VTABLE(u)->check_gc(u)) | |
385 | return true; | |
386 | ||
387 | return false; | |
388 | } | |
389 | ||
87f0e418 LP |
390 | void unit_add_to_load_queue(Unit *u) { |
391 | assert(u); | |
ac155bb8 | 392 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 393 | |
ac155bb8 | 394 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
395 | return; |
396 | ||
71fda00f | 397 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 398 | u->in_load_queue = true; |
87f0e418 LP |
399 | } |
400 | ||
23a177ef LP |
401 | void unit_add_to_cleanup_queue(Unit *u) { |
402 | assert(u); | |
403 | ||
ac155bb8 | 404 | if (u->in_cleanup_queue) |
23a177ef LP |
405 | return; |
406 | ||
71fda00f | 407 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 408 | u->in_cleanup_queue = true; |
23a177ef LP |
409 | } |
410 | ||
701cc384 LP |
411 | void unit_add_to_gc_queue(Unit *u) { |
412 | assert(u); | |
413 | ||
ac155bb8 | 414 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
415 | return; |
416 | ||
417 | if (unit_check_gc(u)) | |
418 | return; | |
419 | ||
c5a97ed1 | 420 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 421 | u->in_gc_queue = true; |
701cc384 LP |
422 | } |
423 | ||
c1e1601e LP |
424 | void unit_add_to_dbus_queue(Unit *u) { |
425 | assert(u); | |
ac155bb8 | 426 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 427 | |
ac155bb8 | 428 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
429 | return; |
430 | ||
a567261a | 431 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 432 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 433 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 434 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 435 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
436 | return; |
437 | } | |
438 | ||
71fda00f | 439 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 440 | u->in_dbus_queue = true; |
c1e1601e LP |
441 | } |
442 | ||
eef85c4a | 443 | static void bidi_set_free(Unit *u, Hashmap *h) { |
87f0e418 | 444 | Unit *other; |
eef85c4a LP |
445 | Iterator i; |
446 | void *v; | |
87f0e418 LP |
447 | |
448 | assert(u); | |
449 | ||
eef85c4a | 450 | /* Frees the hashmap and makes sure we are dropped from the inverse pointers */ |
87f0e418 | 451 | |
eef85c4a | 452 | HASHMAP_FOREACH_KEY(v, other, h, i) { |
87f0e418 LP |
453 | UnitDependency d; |
454 | ||
455 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
eef85c4a | 456 | hashmap_remove(other->dependencies[d], u); |
701cc384 LP |
457 | |
458 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
459 | } |
460 | ||
eef85c4a | 461 | hashmap_free(h); |
87f0e418 LP |
462 | } |
463 | ||
c2756a68 LP |
464 | static void unit_remove_transient(Unit *u) { |
465 | char **i; | |
466 | ||
467 | assert(u); | |
468 | ||
469 | if (!u->transient) | |
470 | return; | |
471 | ||
472 | if (u->fragment_path) | |
3f5e8115 | 473 | (void) unlink(u->fragment_path); |
c2756a68 LP |
474 | |
475 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 476 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 477 | |
39591351 LP |
478 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
479 | if (!p) | |
480 | continue; | |
481 | ||
482 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
483 | if (!pp) | |
484 | continue; | |
485 | ||
486 | /* Only drop transient drop-ins */ | |
487 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
488 | continue; | |
c2756a68 | 489 | |
39591351 LP |
490 | (void) unlink(*i); |
491 | (void) rmdir(p); | |
c2756a68 LP |
492 | } |
493 | } | |
494 | ||
a57f7e2c | 495 | static void unit_free_requires_mounts_for(Unit *u) { |
eef85c4a | 496 | assert(u); |
a57f7e2c | 497 | |
eef85c4a LP |
498 | for (;;) { |
499 | _cleanup_free_ char *path; | |
a57f7e2c | 500 | |
eef85c4a LP |
501 | path = hashmap_steal_first_key(u->requires_mounts_for); |
502 | if (!path) | |
503 | break; | |
504 | else { | |
505 | char s[strlen(path) + 1]; | |
a57f7e2c | 506 | |
eef85c4a LP |
507 | PATH_FOREACH_PREFIX_MORE(s, path) { |
508 | char *y; | |
509 | Set *x; | |
510 | ||
511 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
512 | if (!x) | |
513 | continue; | |
a57f7e2c | 514 | |
eef85c4a | 515 | (void) set_remove(x, u); |
a57f7e2c | 516 | |
eef85c4a LP |
517 | if (set_isempty(x)) { |
518 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
519 | free(y); | |
520 | set_free(x); | |
521 | } | |
a57f7e2c LP |
522 | } |
523 | } | |
524 | } | |
525 | ||
eef85c4a | 526 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
a57f7e2c LP |
527 | } |
528 | ||
598459ce LP |
529 | static void unit_done(Unit *u) { |
530 | ExecContext *ec; | |
531 | CGroupContext *cc; | |
532 | ||
533 | assert(u); | |
534 | ||
535 | if (u->type < 0) | |
536 | return; | |
537 | ||
538 | if (UNIT_VTABLE(u)->done) | |
539 | UNIT_VTABLE(u)->done(u); | |
540 | ||
541 | ec = unit_get_exec_context(u); | |
542 | if (ec) | |
543 | exec_context_done(ec); | |
544 | ||
545 | cc = unit_get_cgroup_context(u); | |
546 | if (cc) | |
547 | cgroup_context_done(cc); | |
548 | } | |
549 | ||
87f0e418 LP |
550 | void unit_free(Unit *u) { |
551 | UnitDependency d; | |
552 | Iterator i; | |
553 | char *t; | |
554 | ||
c9d5c9c0 LP |
555 | if (!u) |
556 | return; | |
87f0e418 | 557 | |
4f4afc88 LP |
558 | if (u->transient_file) |
559 | fclose(u->transient_file); | |
560 | ||
2c289ea8 | 561 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
562 | unit_remove_transient(u); |
563 | ||
c1e1601e LP |
564 | bus_unit_send_removed_signal(u); |
565 | ||
598459ce | 566 | unit_done(u); |
a013b84b | 567 | |
cf9fd508 DM |
568 | sd_bus_slot_unref(u->match_bus_slot); |
569 | ||
05a98afd LP |
570 | sd_bus_track_unref(u->bus_track); |
571 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
572 | ||
a57f7e2c LP |
573 | unit_free_requires_mounts_for(u); |
574 | ||
ac155bb8 MS |
575 | SET_FOREACH(t, u->names, i) |
576 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 577 | |
4b58153d LP |
578 | if (!sd_id128_is_null(u->invocation_id)) |
579 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
580 | ||
97e7d748 MS |
581 | if (u->job) { |
582 | Job *j = u->job; | |
583 | job_uninstall(j); | |
584 | job_free(j); | |
585 | } | |
964e0949 | 586 | |
e0209d83 MS |
587 | if (u->nop_job) { |
588 | Job *j = u->nop_job; | |
589 | job_uninstall(j); | |
590 | job_free(j); | |
591 | } | |
592 | ||
964e0949 | 593 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 594 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 595 | |
ac155bb8 | 596 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 597 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 598 | |
ac155bb8 | 599 | if (u->in_load_queue) |
71fda00f | 600 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 601 | |
ac155bb8 | 602 | if (u->in_dbus_queue) |
71fda00f | 603 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 604 | |
ac155bb8 | 605 | if (u->in_cleanup_queue) |
71fda00f | 606 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 607 | |
a2d72e26 | 608 | if (u->in_gc_queue) |
c5a97ed1 | 609 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 610 | |
91a6073e LP |
611 | if (u->in_cgroup_realize_queue) |
612 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 613 | |
09e24654 LP |
614 | if (u->in_cgroup_empty_queue) |
615 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
616 | ||
efdb0237 | 617 | unit_release_cgroup(u); |
72673e86 | 618 | |
d3070fbd LP |
619 | if (!MANAGER_IS_RELOADING(u->manager)) |
620 | unit_unlink_state_files(u); | |
621 | ||
00d9ef85 LP |
622 | unit_unref_uid_gid(u, false); |
623 | ||
5269eb6b | 624 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 625 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 626 | |
ac155bb8 | 627 | free(u->description); |
49dbfa7b | 628 | strv_free(u->documentation); |
ac155bb8 | 629 | free(u->fragment_path); |
1b64d026 | 630 | free(u->source_path); |
ae7a7182 | 631 | strv_free(u->dropin_paths); |
ac155bb8 | 632 | free(u->instance); |
87f0e418 | 633 | |
f189ab18 LP |
634 | free(u->job_timeout_reboot_arg); |
635 | ||
ac155bb8 | 636 | set_free_free(u->names); |
87f0e418 | 637 | |
a911bb9a LP |
638 | unit_unwatch_all_pids(u); |
639 | ||
ac155bb8 | 640 | condition_free_list(u->conditions); |
59fccdc5 | 641 | condition_free_list(u->asserts); |
52661efd | 642 | |
6bf0f408 LP |
643 | free(u->reboot_arg); |
644 | ||
702a2d8f LP |
645 | unit_ref_unset(&u->slice); |
646 | ||
ac155bb8 MS |
647 | while (u->refs) |
648 | unit_ref_unset(u->refs); | |
57020a3a | 649 | |
6a48d82f DM |
650 | safe_close(u->ip_accounting_ingress_map_fd); |
651 | safe_close(u->ip_accounting_egress_map_fd); | |
652 | ||
653 | safe_close(u->ipv4_allow_map_fd); | |
654 | safe_close(u->ipv6_allow_map_fd); | |
655 | safe_close(u->ipv4_deny_map_fd); | |
656 | safe_close(u->ipv6_deny_map_fd); | |
657 | ||
658 | bpf_program_unref(u->ip_bpf_ingress); | |
659 | bpf_program_unref(u->ip_bpf_egress); | |
660 | ||
87f0e418 LP |
661 | free(u); |
662 | } | |
663 | ||
664 | UnitActiveState unit_active_state(Unit *u) { | |
665 | assert(u); | |
666 | ||
ac155bb8 | 667 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
668 | return unit_active_state(unit_follow_merge(u)); |
669 | ||
670 | /* After a reload it might happen that a unit is not correctly | |
671 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 672 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
673 | |
674 | return UNIT_VTABLE(u)->active_state(u); | |
675 | } | |
676 | ||
10a94420 LP |
677 | const char* unit_sub_state_to_string(Unit *u) { |
678 | assert(u); | |
679 | ||
680 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
681 | } | |
682 | ||
eef85c4a LP |
683 | static int set_complete_move(Set **s, Set **other) { |
684 | assert(s); | |
685 | assert(other); | |
686 | ||
687 | if (!other) | |
688 | return 0; | |
689 | ||
690 | if (*s) | |
691 | return set_move(*s, *other); | |
692 | else { | |
693 | *s = *other; | |
694 | *other = NULL; | |
695 | } | |
7c0b05e5 | 696 | |
eef85c4a LP |
697 | return 0; |
698 | } | |
699 | ||
700 | static int hashmap_complete_move(Hashmap **s, Hashmap **other) { | |
23a177ef LP |
701 | assert(s); |
702 | assert(other); | |
87f0e418 | 703 | |
23a177ef | 704 | if (!*other) |
7c0b05e5 | 705 | return 0; |
87f0e418 | 706 | |
eef85c4a LP |
707 | if (*s) |
708 | return hashmap_move(*s, *other); | |
709 | else { | |
23a177ef LP |
710 | *s = *other; |
711 | *other = NULL; | |
712 | } | |
7c0b05e5 MS |
713 | |
714 | return 0; | |
23a177ef | 715 | } |
87f0e418 | 716 | |
7c0b05e5 | 717 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
718 | char *t; |
719 | Iterator i; | |
7c0b05e5 | 720 | int r; |
87f0e418 | 721 | |
23a177ef LP |
722 | assert(u); |
723 | assert(other); | |
724 | ||
eef85c4a | 725 | r = set_complete_move(&u->names, &other->names); |
7c0b05e5 MS |
726 | if (r < 0) |
727 | return r; | |
23a177ef | 728 | |
ac155bb8 MS |
729 | set_free_free(other->names); |
730 | other->names = NULL; | |
731 | other->id = NULL; | |
23a177ef | 732 | |
ac155bb8 MS |
733 | SET_FOREACH(t, u->names, i) |
734 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
735 | |
736 | return 0; | |
87f0e418 LP |
737 | } |
738 | ||
09a65f92 MS |
739 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
740 | unsigned n_reserve; | |
741 | ||
742 | assert(u); | |
743 | assert(other); | |
744 | assert(d < _UNIT_DEPENDENCY_MAX); | |
745 | ||
746 | /* | |
747 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 748 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
749 | * as a whole to u by complete_move(). |
750 | */ | |
751 | if (!u->dependencies[d]) | |
752 | return 0; | |
753 | ||
754 | /* merge_dependencies() will skip a u-on-u dependency */ | |
eef85c4a | 755 | n_reserve = hashmap_size(other->dependencies[d]) - !!hashmap_get(other->dependencies[d], u); |
09a65f92 | 756 | |
eef85c4a | 757 | return hashmap_reserve(u->dependencies[d], n_reserve); |
09a65f92 MS |
758 | } |
759 | ||
d1fab3fe | 760 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
761 | Iterator i; |
762 | Unit *back; | |
eef85c4a | 763 | void *v; |
87f0e418 | 764 | int r; |
23a177ef | 765 | |
eef85c4a LP |
766 | /* Merges all dependencies of type 'd' of the unit 'other' into the deps of the unit 'u' */ |
767 | ||
23a177ef LP |
768 | assert(u); |
769 | assert(other); | |
770 | assert(d < _UNIT_DEPENDENCY_MAX); | |
771 | ||
eef85c4a LP |
772 | /* Fix backwards pointers. Let's iterate through all dependendent units of the other unit. */ |
773 | HASHMAP_FOREACH_KEY(v, back, other->dependencies[d], i) { | |
23a177ef LP |
774 | UnitDependency k; |
775 | ||
eef85c4a LP |
776 | /* Let's now iterate through the dependencies of that dependencies of the other units, looking for |
777 | * pointers back, and let's fix them up, to instead point to 'u'. */ | |
778 | ||
e48614c4 | 779 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff | 780 | if (back == u) { |
eef85c4a LP |
781 | /* Do not add dependencies between u and itself. */ |
782 | if (hashmap_remove(back->dependencies[k], other)) | |
f2341e0a | 783 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff | 784 | } else { |
eef85c4a LP |
785 | UnitDependencyInfo di_u, di_other, di_merged; |
786 | ||
787 | /* Let's drop this dependency between "back" and "other", and let's create it between | |
788 | * "back" and "u" instead. Let's merge the bit masks of the dependency we are moving, | |
789 | * and any such dependency which might already exist */ | |
790 | ||
791 | di_other.data = hashmap_get(back->dependencies[k], other); | |
792 | if (!di_other.data) | |
793 | continue; /* dependency isn't set, let's try the next one */ | |
794 | ||
795 | di_u.data = hashmap_get(back->dependencies[k], u); | |
796 | ||
797 | di_merged = (UnitDependencyInfo) { | |
798 | .origin_mask = di_u.origin_mask | di_other.origin_mask, | |
799 | .destination_mask = di_u.destination_mask | di_other.destination_mask, | |
800 | }; | |
801 | ||
802 | r = hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data); | |
803 | if (r < 0) | |
804 | log_warning_errno(r, "Failed to remove/replace: back=%s other=%s u=%s: %m", back->id, other_id, u->id); | |
805 | assert(r >= 0); | |
806 | ||
807 | /* assert_se(hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data) >= 0); */ | |
e66047ff | 808 | } |
e48614c4 | 809 | } |
eef85c4a | 810 | |
23a177ef LP |
811 | } |
812 | ||
e66047ff | 813 | /* Also do not move dependencies on u to itself */ |
eef85c4a | 814 | back = hashmap_remove(other->dependencies[d], u); |
d1fab3fe | 815 | if (back) |
f2341e0a | 816 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 817 | |
7c0b05e5 | 818 | /* The move cannot fail. The caller must have performed a reservation. */ |
eef85c4a | 819 | assert_se(hashmap_complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); |
23a177ef | 820 | |
eef85c4a | 821 | other->dependencies[d] = hashmap_free(other->dependencies[d]); |
23a177ef LP |
822 | } |
823 | ||
824 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 825 | UnitDependency d; |
d1fab3fe | 826 | const char *other_id = NULL; |
09a65f92 | 827 | int r; |
87f0e418 LP |
828 | |
829 | assert(u); | |
830 | assert(other); | |
ac155bb8 MS |
831 | assert(u->manager == other->manager); |
832 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 833 | |
cc916967 LP |
834 | other = unit_follow_merge(other); |
835 | ||
23a177ef LP |
836 | if (other == u) |
837 | return 0; | |
838 | ||
ac155bb8 | 839 | if (u->type != other->type) |
9e2f7c11 LP |
840 | return -EINVAL; |
841 | ||
ac155bb8 | 842 | if (!u->instance != !other->instance) |
87f0e418 LP |
843 | return -EINVAL; |
844 | ||
8a993b61 | 845 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
846 | return -EEXIST; |
847 | ||
ec2ce0c5 | 848 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 849 | return -EEXIST; |
87f0e418 | 850 | |
ac155bb8 | 851 | if (other->job) |
819e213f LP |
852 | return -EEXIST; |
853 | ||
e0209d83 MS |
854 | if (other->nop_job) |
855 | return -EEXIST; | |
856 | ||
fdf20a31 | 857 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
858 | return -EEXIST; |
859 | ||
d1fab3fe ZJS |
860 | if (other->id) |
861 | other_id = strdupa(other->id); | |
862 | ||
09a65f92 MS |
863 | /* Make reservations to ensure merge_dependencies() won't fail */ |
864 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
865 | r = reserve_dependencies(u, other, d); | |
866 | /* | |
867 | * We don't rollback reservations if we fail. We don't have | |
868 | * a way to undo reservations. A reservation is not a leak. | |
869 | */ | |
870 | if (r < 0) | |
871 | return r; | |
872 | } | |
873 | ||
87f0e418 | 874 | /* Merge names */ |
7c0b05e5 MS |
875 | r = merge_names(u, other); |
876 | if (r < 0) | |
877 | return r; | |
87f0e418 | 878 | |
57020a3a | 879 | /* Redirect all references */ |
ac155bb8 MS |
880 | while (other->refs) |
881 | unit_ref_set(other->refs, u); | |
57020a3a | 882 | |
87f0e418 LP |
883 | /* Merge dependencies */ |
884 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 885 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 886 | |
ac155bb8 MS |
887 | other->load_state = UNIT_MERGED; |
888 | other->merged_into = u; | |
23a177ef | 889 | |
3616a49c LP |
890 | /* If there is still some data attached to the other node, we |
891 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 892 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
893 | if (UNIT_VTABLE(other)->done) |
894 | UNIT_VTABLE(other)->done(other); | |
895 | ||
896 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
897 | unit_add_to_cleanup_queue(other); |
898 | ||
899 | return 0; | |
900 | } | |
901 | ||
902 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 903 | _cleanup_free_ char *s = NULL; |
23a177ef | 904 | Unit *other; |
9e2f7c11 | 905 | int r; |
23a177ef LP |
906 | |
907 | assert(u); | |
908 | assert(name); | |
909 | ||
7410616c | 910 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 911 | if (!u->instance) |
9e2f7c11 LP |
912 | return -EINVAL; |
913 | ||
7410616c LP |
914 | r = unit_name_replace_instance(name, u->instance, &s); |
915 | if (r < 0) | |
916 | return r; | |
9e2f7c11 LP |
917 | |
918 | name = s; | |
919 | } | |
920 | ||
c2756a68 | 921 | other = manager_get_unit(u->manager, name); |
7410616c LP |
922 | if (other) |
923 | return unit_merge(u, other); | |
23a177ef | 924 | |
7410616c | 925 | return unit_add_name(u, name); |
23a177ef LP |
926 | } |
927 | ||
928 | Unit* unit_follow_merge(Unit *u) { | |
929 | assert(u); | |
930 | ||
ac155bb8 MS |
931 | while (u->load_state == UNIT_MERGED) |
932 | assert_se(u = u->merged_into); | |
23a177ef LP |
933 | |
934 | return u; | |
935 | } | |
936 | ||
937 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
ada5e276 YW |
938 | ExecDirectoryType dt; |
939 | char **dp; | |
23a177ef LP |
940 | int r; |
941 | ||
942 | assert(u); | |
943 | assert(c); | |
944 | ||
36be24c8 | 945 | if (c->working_directory) { |
eef85c4a | 946 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
947 | if (r < 0) |
948 | return r; | |
949 | } | |
950 | ||
951 | if (c->root_directory) { | |
eef85c4a | 952 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
953 | if (r < 0) |
954 | return r; | |
955 | } | |
956 | ||
915e6d16 | 957 | if (c->root_image) { |
eef85c4a | 958 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
959 | if (r < 0) |
960 | return r; | |
961 | } | |
962 | ||
72fd1768 | 963 | for (dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
964 | if (!u->manager->prefix[dt]) |
965 | continue; | |
966 | ||
967 | STRV_FOREACH(dp, c->directories[dt].paths) { | |
968 | _cleanup_free_ char *p; | |
969 | ||
970 | p = strjoin(u->manager->prefix[dt], "/", *dp); | |
971 | if (!p) | |
972 | return -ENOMEM; | |
973 | ||
eef85c4a | 974 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
975 | if (r < 0) |
976 | return r; | |
977 | } | |
978 | } | |
979 | ||
463d0d15 | 980 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
981 | return 0; |
982 | ||
983 | if (c->private_tmp) { | |
d71f0505 LP |
984 | const char *p; |
985 | ||
986 | FOREACH_STRING(p, "/tmp", "/var/tmp") { | |
eef85c4a | 987 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
d71f0505 LP |
988 | if (r < 0) |
989 | return r; | |
990 | } | |
b46a529c | 991 | |
eef85c4a | 992 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, NULL, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
993 | if (r < 0) |
994 | return r; | |
995 | } | |
996 | ||
52c239d7 LB |
997 | if (!IN_SET(c->std_output, |
998 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
999 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1000 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE) && | |
1001 | !IN_SET(c->std_error, | |
1002 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1003 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1004 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE)) | |
23a177ef LP |
1005 | return 0; |
1006 | ||
1007 | /* If syslog or kernel logging is requested, make sure our own | |
1008 | * logging daemon is run first. */ | |
1009 | ||
eef85c4a | 1010 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1011 | if (r < 0) |
1012 | return r; | |
23a177ef | 1013 | |
87f0e418 LP |
1014 | return 0; |
1015 | } | |
1016 | ||
87f0e418 LP |
1017 | const char *unit_description(Unit *u) { |
1018 | assert(u); | |
1019 | ||
ac155bb8 MS |
1020 | if (u->description) |
1021 | return u->description; | |
87f0e418 | 1022 | |
ac155bb8 | 1023 | return strna(u->id); |
87f0e418 LP |
1024 | } |
1025 | ||
eef85c4a LP |
1026 | static void print_unit_dependency_mask(FILE *f, const char *kind, UnitDependencyMask mask, bool *space) { |
1027 | const struct { | |
1028 | UnitDependencyMask mask; | |
1029 | const char *name; | |
1030 | } table[] = { | |
1031 | { UNIT_DEPENDENCY_FILE, "file" }, | |
1032 | { UNIT_DEPENDENCY_IMPLICIT, "implicit" }, | |
1033 | { UNIT_DEPENDENCY_DEFAULT, "default" }, | |
1034 | { UNIT_DEPENDENCY_UDEV, "udev" }, | |
1035 | { UNIT_DEPENDENCY_PATH, "path" }, | |
1036 | { UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT, "mountinfo-implicit" }, | |
1037 | { UNIT_DEPENDENCY_MOUNTINFO_DEFAULT, "mountinfo-default" }, | |
1038 | { UNIT_DEPENDENCY_PROC_SWAP, "proc-swap" }, | |
1039 | }; | |
1040 | size_t i; | |
1041 | ||
1042 | assert(f); | |
1043 | assert(kind); | |
1044 | assert(space); | |
1045 | ||
1046 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
1047 | ||
1048 | if (mask == 0) | |
1049 | break; | |
1050 | ||
1051 | if ((mask & table[i].mask) == table[i].mask) { | |
1052 | if (*space) | |
1053 | fputc(' ', f); | |
1054 | else | |
1055 | *space = true; | |
1056 | ||
1057 | fputs(kind, f); | |
1058 | fputs("-", f); | |
1059 | fputs(table[i].name, f); | |
1060 | ||
1061 | mask &= ~table[i].mask; | |
1062 | } | |
1063 | } | |
1064 | ||
1065 | assert(mask == 0); | |
1066 | } | |
1067 | ||
87f0e418 | 1068 | void unit_dump(Unit *u, FILE *f, const char *prefix) { |
49dbfa7b | 1069 | char *t, **j; |
87f0e418 LP |
1070 | UnitDependency d; |
1071 | Iterator i; | |
47be870b | 1072 | const char *prefix2; |
173e3821 | 1073 | char |
a483fb59 | 1074 | timestamp0[FORMAT_TIMESTAMP_MAX], |
173e3821 LP |
1075 | timestamp1[FORMAT_TIMESTAMP_MAX], |
1076 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
1077 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
1078 | timestamp4[FORMAT_TIMESTAMP_MAX], |
1079 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 1080 | Unit *following; |
eeaedb7c | 1081 | _cleanup_set_free_ Set *following_set = NULL; |
05a98afd | 1082 | const char *n; |
02638280 LP |
1083 | CGroupMask m; |
1084 | int r; | |
87f0e418 LP |
1085 | |
1086 | assert(u); | |
ac155bb8 | 1087 | assert(u->type >= 0); |
87f0e418 | 1088 | |
4c940960 | 1089 | prefix = strempty(prefix); |
63c372cb | 1090 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
1091 | |
1092 | fprintf(f, | |
40d50879 | 1093 | "%s-> Unit %s:\n" |
87f0e418 | 1094 | "%s\tDescription: %s\n" |
9e2f7c11 | 1095 | "%s\tInstance: %s\n" |
87f0e418 | 1096 | "%s\tUnit Load State: %s\n" |
2fad8195 | 1097 | "%s\tUnit Active State: %s\n" |
b895d155 | 1098 | "%s\tState Change Timestamp: %s\n" |
173e3821 | 1099 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 1100 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 1101 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 1102 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 1103 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 1104 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 1105 | "%s\tTransient: %s\n" |
f5869324 | 1106 | "%s\tPerpetual: %s\n" |
5afe510c | 1107 | "%s\tGarbage Collection Mode: %s\n" |
4ad49000 LP |
1108 | "%s\tSlice: %s\n" |
1109 | "%s\tCGroup: %s\n" | |
aae7e17f | 1110 | "%s\tCGroup realized: %s\n", |
ac155bb8 | 1111 | prefix, u->id, |
87f0e418 | 1112 | prefix, unit_description(u), |
ac155bb8 MS |
1113 | prefix, strna(u->instance), |
1114 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 1115 | prefix, unit_active_state_to_string(unit_active_state(u)), |
a483fb59 | 1116 | prefix, strna(format_timestamp(timestamp0, sizeof(timestamp0), u->state_change_timestamp.realtime)), |
ac155bb8 MS |
1117 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
1118 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
1119 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
1120 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 1121 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 1122 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 1123 | prefix, yes_no(u->transient), |
f5869324 | 1124 | prefix, yes_no(u->perpetual), |
5afe510c | 1125 | prefix, collect_mode_to_string(u->collect_mode), |
4ad49000 LP |
1126 | prefix, strna(unit_slice_name(u)), |
1127 | prefix, strna(u->cgroup_path), | |
aae7e17f FB |
1128 | prefix, yes_no(u->cgroup_realized)); |
1129 | ||
1130 | if (u->cgroup_realized_mask != 0) { | |
1131 | _cleanup_free_ char *s = NULL; | |
1132 | (void) cg_mask_to_string(u->cgroup_realized_mask, &s); | |
02638280 LP |
1133 | fprintf(f, "%s\tCGroup realized mask: %s\n", prefix, strnull(s)); |
1134 | } | |
1135 | if (u->cgroup_enabled_mask != 0) { | |
1136 | _cleanup_free_ char *s = NULL; | |
1137 | (void) cg_mask_to_string(u->cgroup_enabled_mask, &s); | |
1138 | fprintf(f, "%s\tCGroup enabled mask: %s\n", prefix, strnull(s)); | |
1139 | } | |
1140 | m = unit_get_own_mask(u); | |
1141 | if (m != 0) { | |
1142 | _cleanup_free_ char *s = NULL; | |
1143 | (void) cg_mask_to_string(m, &s); | |
1144 | fprintf(f, "%s\tCGroup own mask: %s\n", prefix, strnull(s)); | |
aae7e17f | 1145 | } |
02638280 LP |
1146 | m = unit_get_members_mask(u); |
1147 | if (m != 0) { | |
aae7e17f | 1148 | _cleanup_free_ char *s = NULL; |
02638280 | 1149 | (void) cg_mask_to_string(m, &s); |
aae7e17f FB |
1150 | fprintf(f, "%s\tCGroup members mask: %s\n", prefix, strnull(s)); |
1151 | } | |
0301abf4 | 1152 | |
ac155bb8 | 1153 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
1154 | fprintf(f, "%s\tName: %s\n", prefix, t); |
1155 | ||
4b58153d LP |
1156 | if (!sd_id128_is_null(u->invocation_id)) |
1157 | fprintf(f, "%s\tInvocation ID: " SD_ID128_FORMAT_STR "\n", | |
1158 | prefix, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
1159 | ||
49dbfa7b LP |
1160 | STRV_FOREACH(j, u->documentation) |
1161 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
1162 | ||
eeaedb7c LP |
1163 | following = unit_following(u); |
1164 | if (following) | |
ac155bb8 | 1165 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 1166 | |
eeaedb7c LP |
1167 | r = unit_following_set(u, &following_set); |
1168 | if (r >= 0) { | |
1169 | Unit *other; | |
1170 | ||
1171 | SET_FOREACH(other, following_set, i) | |
1172 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
1173 | } | |
1174 | ||
ac155bb8 MS |
1175 | if (u->fragment_path) |
1176 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 1177 | |
1b64d026 LP |
1178 | if (u->source_path) |
1179 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
1180 | ||
ae7a7182 | 1181 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 1182 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 1183 | |
36c16a7c | 1184 | if (u->job_timeout != USEC_INFINITY) |
2fa4092c | 1185 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 1186 | |
87a47f99 LN |
1187 | if (u->job_timeout_action != EMERGENCY_ACTION_NONE) |
1188 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, emergency_action_to_string(u->job_timeout_action)); | |
f189ab18 LP |
1189 | |
1190 | if (u->job_timeout_reboot_arg) | |
1191 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
1192 | ||
59fccdc5 LP |
1193 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
1194 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 1195 | |
ac155bb8 | 1196 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
1197 | fprintf(f, |
1198 | "%s\tCondition Timestamp: %s\n" | |
1199 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
1200 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
1201 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 1202 | |
59fccdc5 LP |
1203 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
1204 | fprintf(f, | |
1205 | "%s\tAssert Timestamp: %s\n" | |
1206 | "%s\tAssert Result: %s\n", | |
1207 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
1208 | prefix, yes_no(u->assert_result)); | |
1209 | ||
87f0e418 | 1210 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
eef85c4a | 1211 | UnitDependencyInfo di; |
87f0e418 LP |
1212 | Unit *other; |
1213 | ||
eef85c4a LP |
1214 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { |
1215 | bool space = false; | |
1216 | ||
1217 | fprintf(f, "%s\t%s: %s (", prefix, unit_dependency_to_string(d), other->id); | |
1218 | ||
1219 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); | |
1220 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1221 | ||
1222 | fputs(")\n", f); | |
1223 | } | |
87f0e418 LP |
1224 | } |
1225 | ||
eef85c4a LP |
1226 | if (!hashmap_isempty(u->requires_mounts_for)) { |
1227 | UnitDependencyInfo di; | |
1228 | const char *path; | |
1229 | ||
1230 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { | |
1231 | bool space = false; | |
7c8fa05c | 1232 | |
eef85c4a | 1233 | fprintf(f, "%s\tRequiresMountsFor: %s (", prefix, path); |
7c8fa05c | 1234 | |
eef85c4a LP |
1235 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); |
1236 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1237 | ||
1238 | fputs(")\n", f); | |
1239 | } | |
7c8fa05c LP |
1240 | } |
1241 | ||
ac155bb8 | 1242 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 1243 | |
b0650475 | 1244 | fprintf(f, |
a40eb732 | 1245 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
1246 | "%s\tRefuseManualStart: %s\n" |
1247 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 1248 | "%s\tDefaultDependencies: %s\n" |
d420282b | 1249 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1250 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1251 | prefix, yes_no(u->stop_when_unneeded), |
1252 | prefix, yes_no(u->refuse_manual_start), | |
1253 | prefix, yes_no(u->refuse_manual_stop), | |
1254 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1255 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1256 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 1257 | |
23a177ef LP |
1258 | if (UNIT_VTABLE(u)->dump) |
1259 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1260 | |
ac155bb8 | 1261 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1262 | fprintf(f, |
1263 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1264 | prefix, u->merged_into->id); |
1265 | else if (u->load_state == UNIT_ERROR) | |
1266 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 1267 | |
05a98afd LP |
1268 | for (n = sd_bus_track_first(u->bus_track); n; n = sd_bus_track_next(u->bus_track)) |
1269 | fprintf(f, "%s\tBus Ref: %s\n", prefix, n); | |
87f0e418 | 1270 | |
ac155bb8 MS |
1271 | if (u->job) |
1272 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1273 | |
e0209d83 MS |
1274 | if (u->nop_job) |
1275 | job_dump(u->nop_job, f, prefix2); | |
87f0e418 LP |
1276 | } |
1277 | ||
1278 | /* Common implementation for multiple backends */ | |
e537352b | 1279 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1280 | int r; |
1281 | ||
1282 | assert(u); | |
23a177ef | 1283 | |
e48614c4 | 1284 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1285 | r = unit_load_fragment(u); |
1286 | if (r < 0) | |
23a177ef LP |
1287 | return r; |
1288 | ||
ac155bb8 | 1289 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1290 | return -ENOENT; |
1291 | ||
9e4ea9cc ZJS |
1292 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1293 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1294 | * been loaded and which not, at least without doing complicated book-keeping, | |
1295 | * so let's always reread all drop-ins. */ | |
1296 | return unit_load_dropin(unit_follow_merge(u)); | |
23a177ef LP |
1297 | } |
1298 | ||
1299 | /* Common implementation for multiple backends */ | |
e537352b | 1300 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1301 | int r; |
87f0e418 LP |
1302 | |
1303 | assert(u); | |
1304 | ||
23a177ef LP |
1305 | /* Same as unit_load_fragment_and_dropin(), but whether |
1306 | * something can be loaded or not doesn't matter. */ | |
1307 | ||
1308 | /* Load a .service file */ | |
4ad49000 LP |
1309 | r = unit_load_fragment(u); |
1310 | if (r < 0) | |
87f0e418 LP |
1311 | return r; |
1312 | ||
ac155bb8 MS |
1313 | if (u->load_state == UNIT_STUB) |
1314 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1315 | |
9e4ea9cc ZJS |
1316 | /* Load drop-in directory data */ |
1317 | return unit_load_dropin(unit_follow_merge(u)); | |
87f0e418 LP |
1318 | } |
1319 | ||
bba34eed | 1320 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1321 | assert(u); |
1322 | assert(target); | |
1323 | ||
ac155bb8 | 1324 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1325 | return 0; |
1326 | ||
35b8ca3a | 1327 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1328 | * that loop check below is reliable */ |
ac155bb8 MS |
1329 | if (u->load_state != UNIT_LOADED || |
1330 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1331 | return 0; |
1332 | ||
21256a2b LP |
1333 | /* If either side wants no automatic dependencies, then let's |
1334 | * skip this */ | |
ac155bb8 MS |
1335 | if (!u->default_dependencies || |
1336 | !target->default_dependencies) | |
21256a2b LP |
1337 | return 0; |
1338 | ||
98bc2000 | 1339 | /* Don't create loops */ |
eef85c4a | 1340 | if (hashmap_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1341 | return 0; |
1342 | ||
eef85c4a | 1343 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1344 | } |
1345 | ||
e954c9cf | 1346 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 1347 | |
21256a2b LP |
1348 | static const UnitDependency deps[] = { |
1349 | UNIT_REQUIRED_BY, | |
be7d9ff7 | 1350 | UNIT_REQUISITE_OF, |
21256a2b LP |
1351 | UNIT_WANTED_BY, |
1352 | UNIT_BOUND_BY | |
1353 | }; | |
1354 | ||
21256a2b | 1355 | unsigned k; |
db57f3c6 | 1356 | int r = 0; |
98bc2000 LP |
1357 | |
1358 | assert(u); | |
1359 | ||
eef85c4a LP |
1360 | for (k = 0; k < ELEMENTSOF(deps); k++) { |
1361 | Unit *target; | |
1362 | Iterator i; | |
1363 | void *v; | |
1364 | ||
1365 | HASHMAP_FOREACH_KEY(v, target, u->dependencies[deps[k]], i) { | |
a016b922 LP |
1366 | r = unit_add_default_target_dependency(u, target); |
1367 | if (r < 0) | |
21256a2b | 1368 | return r; |
a016b922 | 1369 | } |
eef85c4a | 1370 | } |
a016b922 | 1371 | |
e954c9cf LP |
1372 | return r; |
1373 | } | |
4ad49000 | 1374 | |
e954c9cf | 1375 | static int unit_add_slice_dependencies(Unit *u) { |
eef85c4a | 1376 | UnitDependencyMask mask; |
e954c9cf | 1377 | assert(u); |
b81884e7 | 1378 | |
35b7ff80 | 1379 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1380 | return 0; |
1381 | ||
eef85c4a LP |
1382 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1383 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1384 | relationship). */ | |
1385 | mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; | |
1386 | ||
e954c9cf | 1387 | if (UNIT_ISSET(u->slice)) |
eef85c4a | 1388 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true, mask); |
e954c9cf | 1389 | |
8c8da0e0 | 1390 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1391 | return 0; |
1392 | ||
eef85c4a | 1393 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, NULL, true, mask); |
98bc2000 LP |
1394 | } |
1395 | ||
e954c9cf | 1396 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1397 | UnitDependencyInfo di; |
1398 | const char *path; | |
1399 | Iterator i; | |
9588bc32 LP |
1400 | int r; |
1401 | ||
1402 | assert(u); | |
1403 | ||
eef85c4a LP |
1404 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { |
1405 | char prefix[strlen(path) + 1]; | |
9588bc32 | 1406 | |
eef85c4a | 1407 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1408 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1409 | Unit *m; |
1410 | ||
c7c89abb | 1411 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1412 | if (r < 0) |
1413 | return r; | |
c7c89abb FB |
1414 | |
1415 | m = manager_get_unit(u->manager, p); | |
1416 | if (!m) { | |
1417 | /* Make sure to load the mount unit if | |
1418 | * it exists. If so the dependencies | |
1419 | * on this unit will be added later | |
1420 | * during the loading of the mount | |
1421 | * unit. */ | |
1422 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1423 | continue; |
c7c89abb | 1424 | } |
9588bc32 LP |
1425 | if (m == u) |
1426 | continue; | |
1427 | ||
1428 | if (m->load_state != UNIT_LOADED) | |
1429 | continue; | |
1430 | ||
eef85c4a | 1431 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1432 | if (r < 0) |
1433 | return r; | |
1434 | ||
1435 | if (m->fragment_path) { | |
eef85c4a | 1436 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1437 | if (r < 0) |
1438 | return r; | |
1439 | } | |
1440 | } | |
1441 | } | |
1442 | ||
1443 | return 0; | |
1444 | } | |
1445 | ||
95ae05c0 WC |
1446 | static int unit_add_startup_units(Unit *u) { |
1447 | CGroupContext *c; | |
5269eb6b | 1448 | int r; |
95ae05c0 WC |
1449 | |
1450 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1451 | if (!c) |
1452 | return 0; | |
1453 | ||
d53d9474 | 1454 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1455 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1456 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1457 | return 0; |
1458 | ||
5269eb6b LP |
1459 | r = set_ensure_allocated(&u->manager->startup_units, NULL); |
1460 | if (r < 0) | |
1461 | return r; | |
1462 | ||
756c09e6 | 1463 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1464 | } |
1465 | ||
87f0e418 LP |
1466 | int unit_load(Unit *u) { |
1467 | int r; | |
1468 | ||
1469 | assert(u); | |
1470 | ||
ac155bb8 | 1471 | if (u->in_load_queue) { |
71fda00f | 1472 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1473 | u->in_load_queue = false; |
87f0e418 LP |
1474 | } |
1475 | ||
ac155bb8 | 1476 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1477 | return -EINVAL; |
1478 | ||
ac155bb8 | 1479 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1480 | return 0; |
1481 | ||
4f4afc88 LP |
1482 | if (u->transient_file) { |
1483 | r = fflush_and_check(u->transient_file); | |
1484 | if (r < 0) | |
1485 | goto fail; | |
1486 | ||
1487 | fclose(u->transient_file); | |
1488 | u->transient_file = NULL; | |
f9ba08fb | 1489 | |
f76707da | 1490 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1491 | } |
1492 | ||
c2756a68 LP |
1493 | if (UNIT_VTABLE(u)->load) { |
1494 | r = UNIT_VTABLE(u)->load(u); | |
1495 | if (r < 0) | |
87f0e418 | 1496 | goto fail; |
c2756a68 | 1497 | } |
23a177ef | 1498 | |
ac155bb8 | 1499 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1500 | r = -ENOENT; |
1501 | goto fail; | |
1502 | } | |
1503 | ||
7c8fa05c | 1504 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1505 | |
e954c9cf LP |
1506 | r = unit_add_target_dependencies(u); |
1507 | if (r < 0) | |
1508 | goto fail; | |
1509 | ||
1510 | r = unit_add_slice_dependencies(u); | |
1511 | if (r < 0) | |
1512 | goto fail; | |
c2756a68 | 1513 | |
e954c9cf | 1514 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1515 | if (r < 0) |
c2756a68 | 1516 | goto fail; |
7c8fa05c | 1517 | |
95ae05c0 WC |
1518 | r = unit_add_startup_units(u); |
1519 | if (r < 0) | |
1520 | goto fail; | |
1521 | ||
eef85c4a | 1522 | if (u->on_failure_job_mode == JOB_ISOLATE && hashmap_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1523 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
c2756a68 LP |
1524 | r = -EINVAL; |
1525 | goto fail; | |
1526 | } | |
bc432dc7 | 1527 | |
a2df3ea4 MK |
1528 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1529 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1530 | ||
bc432dc7 | 1531 | unit_update_cgroup_members_masks(u); |
f68319bb LP |
1532 | } |
1533 | ||
ac155bb8 | 1534 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1535 | |
1536 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1537 | unit_add_to_gc_queue(u); |
87f0e418 | 1538 | |
87f0e418 LP |
1539 | return 0; |
1540 | ||
1541 | fail: | |
c2756a68 | 1542 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1543 | u->load_error = r; |
c1e1601e | 1544 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1545 | unit_add_to_gc_queue(u); |
23a177ef | 1546 | |
f2341e0a | 1547 | log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
23a177ef | 1548 | |
87f0e418 LP |
1549 | return r; |
1550 | } | |
1551 | ||
49365733 LP |
1552 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1553 | Condition *c; | |
1554 | int triggered = -1; | |
1555 | ||
1556 | assert(u); | |
1557 | assert(to_string); | |
1558 | ||
1559 | /* If the condition list is empty, then it is true */ | |
1560 | if (!first) | |
1561 | return true; | |
1562 | ||
1563 | /* Otherwise, if all of the non-trigger conditions apply and | |
1564 | * if any of the trigger conditions apply (unless there are | |
1565 | * none) we return true */ | |
1566 | LIST_FOREACH(conditions, c, first) { | |
1567 | int r; | |
1568 | ||
1569 | r = condition_test(c); | |
1570 | if (r < 0) | |
f2341e0a LP |
1571 | log_unit_warning(u, |
1572 | "Couldn't determine result for %s=%s%s%s, assuming failed: %m", | |
49365733 LP |
1573 | to_string(c->type), |
1574 | c->trigger ? "|" : "", | |
1575 | c->negate ? "!" : "", | |
f2341e0a | 1576 | c->parameter); |
49365733 | 1577 | else |
f2341e0a LP |
1578 | log_unit_debug(u, |
1579 | "%s=%s%s%s %s.", | |
49365733 LP |
1580 | to_string(c->type), |
1581 | c->trigger ? "|" : "", | |
1582 | c->negate ? "!" : "", | |
1583 | c->parameter, | |
f2341e0a | 1584 | condition_result_to_string(c->result)); |
49365733 LP |
1585 | |
1586 | if (!c->trigger && r <= 0) | |
1587 | return false; | |
1588 | ||
1589 | if (c->trigger && triggered <= 0) | |
1590 | triggered = r > 0; | |
1591 | } | |
1592 | ||
1593 | return triggered != 0; | |
1594 | } | |
1595 | ||
9588bc32 | 1596 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1597 | assert(u); |
1598 | ||
ac155bb8 | 1599 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1600 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1601 | |
ac155bb8 | 1602 | return u->condition_result; |
90bbc946 LP |
1603 | } |
1604 | ||
59fccdc5 LP |
1605 | static bool unit_assert_test(Unit *u) { |
1606 | assert(u); | |
1607 | ||
1608 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1609 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1610 | |
1611 | return u->assert_result; | |
1612 | } | |
1613 | ||
df446f96 LP |
1614 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
1615 | DISABLE_WARNING_FORMAT_NONLITERAL; | |
1616 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, status, unit_status_msg_format, unit_description(u)); | |
1617 | REENABLE_WARNING; | |
1618 | } | |
1619 | ||
44a6b1b6 | 1620 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
877d54e9 | 1621 | const char *format; |
a85ca902 | 1622 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1623 | |
1624 | assert(u); | |
df446f96 | 1625 | assert(IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)); |
877d54e9 | 1626 | |
b5bf308b | 1627 | if (t != JOB_RELOAD) { |
a85ca902 MS |
1628 | format_table = &UNIT_VTABLE(u)->status_message_formats; |
1629 | if (format_table) { | |
1630 | format = format_table->starting_stopping[t == JOB_STOP]; | |
1631 | if (format) | |
1632 | return format; | |
1633 | } | |
1634 | } | |
877d54e9 LP |
1635 | |
1636 | /* Return generic strings */ | |
1637 | if (t == JOB_START) | |
1638 | return "Starting %s."; | |
1639 | else if (t == JOB_STOP) | |
1640 | return "Stopping %s."; | |
b5bf308b | 1641 | else |
877d54e9 | 1642 | return "Reloading %s."; |
877d54e9 LP |
1643 | } |
1644 | ||
1645 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1646 | const char *format; | |
1647 | ||
1648 | assert(u); | |
1649 | ||
df446f96 LP |
1650 | /* Reload status messages have traditionally not been printed to console. */ |
1651 | if (!IN_SET(t, JOB_START, JOB_STOP)) | |
1652 | return; | |
1653 | ||
877d54e9 | 1654 | format = unit_get_status_message_format(u, t); |
c6918296 | 1655 | |
bcfce235 | 1656 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1657 | unit_status_printf(u, "", format); |
bcfce235 | 1658 | REENABLE_WARNING; |
c6918296 MS |
1659 | } |
1660 | ||
877d54e9 | 1661 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
2b044526 | 1662 | const char *format, *mid; |
877d54e9 | 1663 | char buf[LINE_MAX]; |
877d54e9 LP |
1664 | |
1665 | assert(u); | |
1666 | ||
df446f96 | 1667 | if (!IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)) |
877d54e9 LP |
1668 | return; |
1669 | ||
81270860 LP |
1670 | if (log_on_console()) |
1671 | return; | |
1672 | ||
877d54e9 LP |
1673 | /* We log status messages for all units and all operations. */ |
1674 | ||
a85ca902 | 1675 | format = unit_get_status_message_format(u, t); |
877d54e9 | 1676 | |
bcfce235 | 1677 | DISABLE_WARNING_FORMAT_NONLITERAL; |
e68eedbb | 1678 | snprintf(buf, sizeof buf, format, unit_description(u)); |
bcfce235 | 1679 | REENABLE_WARNING; |
877d54e9 | 1680 | |
2b044526 ZJS |
1681 | mid = t == JOB_START ? "MESSAGE_ID=" SD_MESSAGE_UNIT_STARTING_STR : |
1682 | t == JOB_STOP ? "MESSAGE_ID=" SD_MESSAGE_UNIT_STOPPING_STR : | |
1683 | "MESSAGE_ID=" SD_MESSAGE_UNIT_RELOADING_STR; | |
877d54e9 | 1684 | |
f2341e0a LP |
1685 | /* Note that we deliberately use LOG_MESSAGE() instead of |
1686 | * LOG_UNIT_MESSAGE() here, since this is supposed to mimic | |
1687 | * closely what is written to screen using the status output, | |
1688 | * which is supposed the highest level, friendliest output | |
1689 | * possible, which means we should avoid the low-level unit | |
1690 | * name. */ | |
1691 | log_struct(LOG_INFO, | |
f2341e0a | 1692 | LOG_MESSAGE("%s", buf), |
ba360bb0 | 1693 | LOG_UNIT_ID(u), |
f1c50bec | 1694 | LOG_UNIT_INVOCATION_ID(u), |
ba360bb0 | 1695 | mid, |
f2341e0a | 1696 | NULL); |
877d54e9 | 1697 | } |
877d54e9 | 1698 | |
d1a34ae9 | 1699 | void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t) { |
df446f96 LP |
1700 | assert(u); |
1701 | assert(t >= 0); | |
1702 | assert(t < _JOB_TYPE_MAX); | |
d1a34ae9 MS |
1703 | |
1704 | unit_status_log_starting_stopping_reloading(u, t); | |
df446f96 | 1705 | unit_status_print_starting_stopping(u, t); |
d1a34ae9 MS |
1706 | } |
1707 | ||
07299350 | 1708 | int unit_start_limit_test(Unit *u) { |
6bf0f408 LP |
1709 | assert(u); |
1710 | ||
1711 | if (ratelimit_test(&u->start_limit)) { | |
1712 | u->start_limit_hit = false; | |
1713 | return 0; | |
1714 | } | |
1715 | ||
1716 | log_unit_warning(u, "Start request repeated too quickly."); | |
1717 | u->start_limit_hit = true; | |
1718 | ||
87a47f99 | 1719 | return emergency_action(u->manager, u->start_limit_action, u->reboot_arg, "unit failed"); |
6bf0f408 LP |
1720 | } |
1721 | ||
c891efaf | 1722 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1723 | assert(u); |
c891efaf FB |
1724 | |
1725 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1726 | return false; | |
1727 | ||
1728 | /* For some reasons units remaining in the same process group | |
1729 | * as PID 1 fail to acquire the console even if it's not used | |
1730 | * by any process. So skip the confirmation question for them. */ | |
1731 | return !unit_get_exec_context(u)->same_pgrp; | |
1732 | } | |
1733 | ||
631b676b LP |
1734 | static bool unit_verify_deps(Unit *u) { |
1735 | Unit *other; | |
1736 | Iterator j; | |
eef85c4a | 1737 | void *v; |
631b676b LP |
1738 | |
1739 | assert(u); | |
1740 | ||
1741 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with | |
1742 | * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job | |
1743 | * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in | |
1744 | * conjunction with After= as for them any such check would make things entirely racy. */ | |
1745 | ||
eef85c4a | 1746 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], j) { |
631b676b | 1747 | |
eef85c4a | 1748 | if (!hashmap_contains(u->dependencies[UNIT_AFTER], other)) |
631b676b LP |
1749 | continue; |
1750 | ||
1751 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1752 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1753 | return false; | |
1754 | } | |
1755 | } | |
1756 | ||
1757 | return true; | |
1758 | } | |
1759 | ||
87f0e418 | 1760 | /* Errors: |
6bf0f408 LP |
1761 | * -EBADR: This unit type does not support starting. |
1762 | * -EALREADY: Unit is already started. | |
1763 | * -EAGAIN: An operation is already in progress. Retry later. | |
1764 | * -ECANCELED: Too many requests for now. | |
1765 | * -EPROTO: Assert failed | |
1766 | * -EINVAL: Unit not loaded | |
1767 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1768 | * -ENOLINK: The necessary dependencies are not fulfilled. |
87f0e418 LP |
1769 | */ |
1770 | int unit_start(Unit *u) { | |
1771 | UnitActiveState state; | |
92ab323c | 1772 | Unit *following; |
87f0e418 LP |
1773 | |
1774 | assert(u); | |
1775 | ||
a82e5507 LP |
1776 | /* If this is already started, then this will succeed. Note |
1777 | * that this will even succeed if this unit is not startable | |
1778 | * by the user. This is relied on to detect when we need to | |
1779 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1780 | state = unit_active_state(u); |
1781 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1782 | return -EALREADY; | |
1783 | ||
6bf0f408 LP |
1784 | /* Units that aren't loaded cannot be started */ |
1785 | if (u->load_state != UNIT_LOADED) | |
1786 | return -EINVAL; | |
1787 | ||
a82e5507 LP |
1788 | /* If the conditions failed, don't do anything at all. If we |
1789 | * already are activating this call might still be useful to | |
1790 | * speed up activation in case there is some hold-off time, | |
1791 | * but we don't want to recheck the condition in that case. */ | |
1792 | if (state != UNIT_ACTIVATING && | |
1793 | !unit_condition_test(u)) { | |
f2341e0a | 1794 | log_unit_debug(u, "Starting requested but condition failed. Not starting unit."); |
52661efd LP |
1795 | return -EALREADY; |
1796 | } | |
1797 | ||
59fccdc5 LP |
1798 | /* If the asserts failed, fail the entire job */ |
1799 | if (state != UNIT_ACTIVATING && | |
1800 | !unit_assert_test(u)) { | |
f2341e0a | 1801 | log_unit_notice(u, "Starting requested but asserts failed."); |
59fccdc5 LP |
1802 | return -EPROTO; |
1803 | } | |
1804 | ||
d11a7645 LP |
1805 | /* Units of types that aren't supported cannot be |
1806 | * started. Note that we do this test only after the condition | |
1807 | * checks, so that we rather return condition check errors | |
1808 | * (which are usually not considered a true failure) than "not | |
1809 | * supported" errors (which are considered a failure). | |
1810 | */ | |
1811 | if (!unit_supported(u)) | |
1812 | return -EOPNOTSUPP; | |
1813 | ||
631b676b LP |
1814 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine should have |
1815 | * taken care of this already, but let's check this here again. After all, our dependencies might not be in | |
1816 | * effect anymore, due to a reload or due to a failed condition. */ | |
1817 | if (!unit_verify_deps(u)) | |
1818 | return -ENOLINK; | |
1819 | ||
92ab323c | 1820 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1821 | following = unit_following(u); |
1822 | if (following) { | |
f2341e0a | 1823 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1824 | return unit_start(following); |
1825 | } | |
1826 | ||
1827 | /* If it is stopped, but we cannot start it, then fail */ | |
1828 | if (!UNIT_VTABLE(u)->start) | |
1829 | return -EBADR; | |
1830 | ||
87f0e418 LP |
1831 | /* We don't suppress calls to ->start() here when we are |
1832 | * already starting, to allow this request to be used as a | |
1833 | * "hurry up" call, for example when the unit is in some "auto | |
1834 | * restart" state where it waits for a holdoff timer to elapse | |
1835 | * before it will start again. */ | |
1836 | ||
c1e1601e | 1837 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1838 | |
d1a34ae9 | 1839 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1840 | } |
1841 | ||
1842 | bool unit_can_start(Unit *u) { | |
1843 | assert(u); | |
1844 | ||
8ff4d2ab LP |
1845 | if (u->load_state != UNIT_LOADED) |
1846 | return false; | |
1847 | ||
1848 | if (!unit_supported(u)) | |
1849 | return false; | |
1850 | ||
87f0e418 LP |
1851 | return !!UNIT_VTABLE(u)->start; |
1852 | } | |
1853 | ||
2528a7a6 LP |
1854 | bool unit_can_isolate(Unit *u) { |
1855 | assert(u); | |
1856 | ||
1857 | return unit_can_start(u) && | |
ac155bb8 | 1858 | u->allow_isolate; |
2528a7a6 LP |
1859 | } |
1860 | ||
87f0e418 LP |
1861 | /* Errors: |
1862 | * -EBADR: This unit type does not support stopping. | |
1863 | * -EALREADY: Unit is already stopped. | |
1864 | * -EAGAIN: An operation is already in progress. Retry later. | |
1865 | */ | |
1866 | int unit_stop(Unit *u) { | |
1867 | UnitActiveState state; | |
92ab323c | 1868 | Unit *following; |
87f0e418 LP |
1869 | |
1870 | assert(u); | |
1871 | ||
87f0e418 | 1872 | state = unit_active_state(u); |
fdf20a31 | 1873 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1874 | return -EALREADY; |
1875 | ||
0faacd47 LP |
1876 | following = unit_following(u); |
1877 | if (following) { | |
f2341e0a | 1878 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1879 | return unit_stop(following); |
1880 | } | |
1881 | ||
7898b0cf LP |
1882 | if (!UNIT_VTABLE(u)->stop) |
1883 | return -EBADR; | |
1884 | ||
c1e1601e | 1885 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1886 | |
d1a34ae9 | 1887 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1888 | } |
1889 | ||
f5869324 LP |
1890 | bool unit_can_stop(Unit *u) { |
1891 | assert(u); | |
1892 | ||
1893 | if (!unit_supported(u)) | |
1894 | return false; | |
1895 | ||
1896 | if (u->perpetual) | |
1897 | return false; | |
1898 | ||
1899 | return !!UNIT_VTABLE(u)->stop; | |
1900 | } | |
1901 | ||
87f0e418 LP |
1902 | /* Errors: |
1903 | * -EBADR: This unit type does not support reloading. | |
1904 | * -ENOEXEC: Unit is not started. | |
1905 | * -EAGAIN: An operation is already in progress. Retry later. | |
1906 | */ | |
1907 | int unit_reload(Unit *u) { | |
1908 | UnitActiveState state; | |
92ab323c | 1909 | Unit *following; |
87f0e418 LP |
1910 | |
1911 | assert(u); | |
1912 | ||
ac155bb8 | 1913 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1914 | return -EINVAL; |
1915 | ||
87f0e418 LP |
1916 | if (!unit_can_reload(u)) |
1917 | return -EBADR; | |
1918 | ||
1919 | state = unit_active_state(u); | |
e364ad06 | 1920 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1921 | return -EALREADY; |
1922 | ||
6a371e23 | 1923 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1924 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1925 | return -ENOEXEC; |
6a371e23 | 1926 | } |
87f0e418 | 1927 | |
e48614c4 ZJS |
1928 | following = unit_following(u); |
1929 | if (following) { | |
f2341e0a | 1930 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1931 | return unit_reload(following); |
1932 | } | |
1933 | ||
c1e1601e | 1934 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1935 | |
f54bcca5 JR |
1936 | if (!UNIT_VTABLE(u)->reload) { |
1937 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
1938 | unit_notify(u, unit_active_state(u), unit_active_state(u), true); | |
1939 | return 0; | |
1940 | } | |
1941 | ||
d1a34ae9 | 1942 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1943 | } |
1944 | ||
1945 | bool unit_can_reload(Unit *u) { | |
1946 | assert(u); | |
1947 | ||
f54bcca5 JR |
1948 | if (UNIT_VTABLE(u)->can_reload) |
1949 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 1950 | |
eef85c4a | 1951 | if (!hashmap_isempty(u->dependencies[UNIT_PROPAGATES_RELOAD_TO])) |
87f0e418 LP |
1952 | return true; |
1953 | ||
f54bcca5 | 1954 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
1955 | } |
1956 | ||
b4a16b7b | 1957 | static void unit_check_unneeded(Unit *u) { |
be7d9ff7 | 1958 | |
4afd3348 | 1959 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
4bd29fe5 | 1960 | |
be7d9ff7 LP |
1961 | static const UnitDependency needed_dependencies[] = { |
1962 | UNIT_REQUIRED_BY, | |
084918ba | 1963 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1964 | UNIT_WANTED_BY, |
1965 | UNIT_BOUND_BY, | |
1966 | }; | |
1967 | ||
be7d9ff7 LP |
1968 | unsigned j; |
1969 | int r; | |
f3bff0eb LP |
1970 | |
1971 | assert(u); | |
1972 | ||
1973 | /* If this service shall be shut down when unneeded then do | |
1974 | * so. */ | |
1975 | ||
ac155bb8 | 1976 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1977 | return; |
1978 | ||
1979 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1980 | return; | |
1981 | ||
eef85c4a LP |
1982 | for (j = 0; j < ELEMENTSOF(needed_dependencies); j++) { |
1983 | Unit *other; | |
1984 | Iterator i; | |
1985 | void *v; | |
1986 | ||
1987 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[needed_dependencies[j]], i) | |
be7d9ff7 LP |
1988 | if (unit_active_or_pending(other)) |
1989 | return; | |
eef85c4a | 1990 | } |
b81884e7 | 1991 | |
595bfe7d | 1992 | /* If stopping a unit fails continuously we might enter a stop |
bea355da LP |
1993 | * loop here, hence stop acting on the service being |
1994 | * unnecessary after a while. */ | |
67bfdc97 | 1995 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { |
bea355da LP |
1996 | log_unit_warning(u, "Unit not needed anymore, but not stopping since we tried this too often recently."); |
1997 | return; | |
1998 | } | |
1999 | ||
f2341e0a | 2000 | log_unit_info(u, "Unit not needed anymore. Stopping."); |
f3bff0eb LP |
2001 | |
2002 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
4bd29fe5 | 2003 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
be7d9ff7 | 2004 | if (r < 0) |
4bd29fe5 | 2005 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
f3bff0eb LP |
2006 | } |
2007 | ||
ff502445 | 2008 | static void unit_check_binds_to(Unit *u) { |
4afd3348 | 2009 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
ff502445 LP |
2010 | bool stop = false; |
2011 | Unit *other; | |
2012 | Iterator i; | |
eef85c4a | 2013 | void *v; |
67bfdc97 | 2014 | int r; |
ff502445 LP |
2015 | |
2016 | assert(u); | |
2017 | ||
2018 | if (u->job) | |
2019 | return; | |
2020 | ||
2021 | if (unit_active_state(u) != UNIT_ACTIVE) | |
2022 | return; | |
2023 | ||
eef85c4a | 2024 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) { |
ff502445 LP |
2025 | if (other->job) |
2026 | continue; | |
13ddc3fc ZJS |
2027 | |
2028 | if (!other->coldplugged) | |
2029 | /* We might yet create a job for the other unit… */ | |
2030 | continue; | |
ff502445 LP |
2031 | |
2032 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
2033 | continue; | |
2034 | ||
2035 | stop = true; | |
98f738b6 | 2036 | break; |
ff502445 LP |
2037 | } |
2038 | ||
2039 | if (!stop) | |
2040 | return; | |
2041 | ||
595bfe7d | 2042 | /* If stopping a unit fails continuously we might enter a stop |
67bfdc97 LP |
2043 | * loop here, hence stop acting on the service being |
2044 | * unnecessary after a while. */ | |
2045 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { | |
2046 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); | |
2047 | return; | |
2048 | } | |
2049 | ||
98f738b6 | 2050 | assert(other); |
f2341e0a | 2051 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
2052 | |
2053 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
4bd29fe5 | 2054 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
67bfdc97 | 2055 | if (r < 0) |
4bd29fe5 | 2056 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
ff502445 LP |
2057 | } |
2058 | ||
87f0e418 LP |
2059 | static void retroactively_start_dependencies(Unit *u) { |
2060 | Iterator i; | |
2061 | Unit *other; | |
eef85c4a | 2062 | void *v; |
87f0e418 LP |
2063 | |
2064 | assert(u); | |
2065 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2066 | ||
eef85c4a LP |
2067 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUIRES], i) |
2068 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2069 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2070 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
b81884e7 | 2071 | |
eef85c4a LP |
2072 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) |
2073 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2074 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2075 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
87f0e418 | 2076 | |
eef85c4a LP |
2077 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_WANTS], i) |
2078 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2079 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2080 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL); |
87f0e418 | 2081 | |
eef85c4a | 2082 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 2083 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2084 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
69dd2852 | 2085 | |
eef85c4a | 2086 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 2087 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2088 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
87f0e418 LP |
2089 | } |
2090 | ||
2091 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 | 2092 | Unit *other; |
eef85c4a LP |
2093 | Iterator i; |
2094 | void *v; | |
87f0e418 LP |
2095 | |
2096 | assert(u); | |
2097 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2098 | ||
b81884e7 | 2099 | /* Pull down units which are bound to us recursively if enabled */ |
eef85c4a | 2100 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 2101 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2102 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
cd0504d0 MS |
2103 | } |
2104 | ||
2105 | static void check_unneeded_dependencies(Unit *u) { | |
cd0504d0 | 2106 | Unit *other; |
eef85c4a LP |
2107 | Iterator i; |
2108 | void *v; | |
cd0504d0 MS |
2109 | |
2110 | assert(u); | |
2111 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
2112 | |
2113 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
eef85c4a | 2114 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 2115 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 2116 | unit_check_unneeded(other); |
eef85c4a | 2117 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 2118 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 2119 | unit_check_unneeded(other); |
eef85c4a | 2120 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 2121 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 2122 | unit_check_unneeded(other); |
eef85c4a | 2123 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
2124 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
2125 | unit_check_unneeded(other); | |
87f0e418 LP |
2126 | } |
2127 | ||
3ecaa09b | 2128 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
2129 | Unit *other; |
2130 | Iterator i; | |
eef85c4a | 2131 | void *v; |
c0daa706 LP |
2132 | |
2133 | assert(u); | |
2134 | ||
eef85c4a | 2135 | if (hashmap_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
2136 | return; |
2137 | ||
f2341e0a | 2138 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 2139 | |
eef85c4a | 2140 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
2141 | int r; |
2142 | ||
4bd29fe5 | 2143 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, NULL, NULL); |
c1b6628d | 2144 | if (r < 0) |
f2341e0a | 2145 | log_unit_error_errno(u, r, "Failed to enqueue OnFailure= job: %m"); |
222ae6a8 | 2146 | } |
c0daa706 LP |
2147 | } |
2148 | ||
3ecaa09b LP |
2149 | void unit_trigger_notify(Unit *u) { |
2150 | Unit *other; | |
2151 | Iterator i; | |
eef85c4a | 2152 | void *v; |
3ecaa09b LP |
2153 | |
2154 | assert(u); | |
2155 | ||
eef85c4a | 2156 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_TRIGGERED_BY], i) |
3ecaa09b LP |
2157 | if (UNIT_VTABLE(other)->trigger_notify) |
2158 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2159 | } | |
2160 | ||
915b1d01 LP |
2161 | static int unit_log_resources(Unit *u) { |
2162 | ||
2163 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + 4]; | |
2164 | size_t n_message_parts = 0, n_iovec = 0; | |
2165 | char* message_parts[3 + 1], *t; | |
2166 | nsec_t nsec = NSEC_INFINITY; | |
2167 | CGroupIPAccountingMetric m; | |
2168 | size_t i; | |
2169 | int r; | |
2170 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2171 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2172 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2173 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2174 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2175 | }; | |
2176 | ||
2177 | assert(u); | |
2178 | ||
2179 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2180 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2181 | * information and the complete data in structured fields. */ | |
2182 | ||
2183 | (void) unit_get_cpu_usage(u, &nsec); | |
2184 | if (nsec != NSEC_INFINITY) { | |
2185 | char buf[FORMAT_TIMESPAN_MAX] = ""; | |
2186 | ||
2187 | /* Format the CPU time for inclusion in the structured log message */ | |
2188 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2189 | r = log_oom(); | |
2190 | goto finish; | |
2191 | } | |
2192 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2193 | ||
2194 | /* Format the CPU time for inclusion in the human language message string */ | |
2195 | format_timespan(buf, sizeof(buf), nsec / NSEC_PER_USEC, USEC_PER_MSEC); | |
2196 | t = strjoin(n_message_parts > 0 ? "consumed " : "Consumed ", buf, " CPU time"); | |
2197 | if (!t) { | |
2198 | r = log_oom(); | |
2199 | goto finish; | |
2200 | } | |
2201 | ||
2202 | message_parts[n_message_parts++] = t; | |
2203 | } | |
2204 | ||
2205 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { | |
2206 | char buf[FORMAT_BYTES_MAX] = ""; | |
2207 | uint64_t value = UINT64_MAX; | |
2208 | ||
2209 | assert(ip_fields[m]); | |
2210 | ||
2211 | (void) unit_get_ip_accounting(u, m, &value); | |
2212 | if (value == UINT64_MAX) | |
2213 | continue; | |
2214 | ||
2215 | /* Format IP accounting data for inclusion in the structured log message */ | |
2216 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2217 | r = log_oom(); | |
2218 | goto finish; | |
2219 | } | |
2220 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2221 | ||
2222 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2223 | * bytes counters (and not for the packets counters) */ | |
2224 | if (m == CGROUP_IP_INGRESS_BYTES) | |
2225 | t = strjoin(n_message_parts > 0 ? "received " : "Received ", | |
2226 | format_bytes(buf, sizeof(buf), value), | |
2227 | " IP traffic"); | |
2228 | else if (m == CGROUP_IP_EGRESS_BYTES) | |
2229 | t = strjoin(n_message_parts > 0 ? "sent " : "Sent ", | |
2230 | format_bytes(buf, sizeof(buf), value), | |
2231 | " IP traffic"); | |
2232 | else | |
2233 | continue; | |
2234 | if (!t) { | |
2235 | r = log_oom(); | |
2236 | goto finish; | |
2237 | } | |
2238 | ||
2239 | message_parts[n_message_parts++] = t; | |
2240 | } | |
2241 | ||
2242 | /* Is there any accounting data available at all? */ | |
2243 | if (n_iovec == 0) { | |
2244 | r = 0; | |
2245 | goto finish; | |
2246 | } | |
2247 | ||
2248 | if (n_message_parts == 0) | |
2249 | t = strjoina("MESSAGE=", u->id, ": Completed"); | |
2250 | else { | |
2251 | _cleanup_free_ char *joined; | |
2252 | ||
2253 | message_parts[n_message_parts] = NULL; | |
2254 | ||
2255 | joined = strv_join(message_parts, ", "); | |
2256 | if (!joined) { | |
2257 | r = log_oom(); | |
2258 | goto finish; | |
2259 | } | |
2260 | ||
2261 | t = strjoina("MESSAGE=", u->id, ": ", joined); | |
2262 | } | |
2263 | ||
2264 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2265 | * and hence don't increase n_iovec for them */ | |
2266 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2267 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2268 | ||
2269 | t = strjoina(u->manager->unit_log_field, u->id); | |
2270 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2271 | ||
2272 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2273 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2274 | ||
2275 | log_struct_iovec(LOG_INFO, iovec, n_iovec + 4); | |
2276 | r = 0; | |
2277 | ||
2278 | finish: | |
2279 | for (i = 0; i < n_message_parts; i++) | |
2280 | free(message_parts[i]); | |
2281 | ||
2282 | for (i = 0; i < n_iovec; i++) | |
2283 | free(iovec[i].iov_base); | |
2284 | ||
2285 | return r; | |
2286 | ||
2287 | } | |
2288 | ||
e2f3b44c | 2289 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 2290 | Manager *m; |
7e6e7b06 | 2291 | bool unexpected; |
a096ed36 | 2292 | |
87f0e418 LP |
2293 | assert(u); |
2294 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2295 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2296 | |
8e471ccd LP |
2297 | /* Note that this is called for all low-level state changes, |
2298 | * even if they might map to the same high-level | |
865cc19a | 2299 | * UnitActiveState! That means that ns == os is an expected |
c5315881 | 2300 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 2301 | * this function will be called too! */ |
87f0e418 | 2302 | |
546ac4f0 MS |
2303 | m = u->manager; |
2304 | ||
f755e3b7 | 2305 | /* Update timestamps for state changes */ |
2c289ea8 | 2306 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2307 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2308 | |
bdbf9951 | 2309 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2310 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2311 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2312 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2313 | |
2314 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2315 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2316 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2317 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2318 | } |
87f0e418 | 2319 | |
865cc19a | 2320 | /* Keep track of failed units */ |
5269eb6b | 2321 | (void) manager_update_failed_units(u->manager, u, ns == UNIT_FAILED); |
f755e3b7 | 2322 | |
d3070fbd LP |
2323 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2324 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
efdb0237 | 2325 | unit_prune_cgroup(u); |
d3070fbd LP |
2326 | unit_unlink_state_files(u); |
2327 | } | |
fb385181 | 2328 | |
9cd86184 | 2329 | /* Note that this doesn't apply to RemainAfterExit services exiting |
6f285378 | 2330 | * successfully, since there's no change of state in that case. Which is |
9cd86184 | 2331 | * why it is handled in service_set_state() */ |
7ed9f6cd | 2332 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
2333 | ExecContext *ec; |
2334 | ||
2335 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 2336 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 | 2337 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
313cefa1 | 2338 | m->n_on_console--; |
31a7eb86 ZJS |
2339 | |
2340 | if (m->n_on_console == 0) | |
2341 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 2342 | m->no_console_output = false; |
31a7eb86 | 2343 | } else |
313cefa1 | 2344 | m->n_on_console++; |
7ed9f6cd MS |
2345 | } |
2346 | } | |
2347 | ||
ac155bb8 | 2348 | if (u->job) { |
7e6e7b06 | 2349 | unexpected = false; |
87f0e418 | 2350 | |
ac155bb8 | 2351 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
2352 | |
2353 | /* So we reached a different state for this | |
2354 | * job. Let's see if we can run it now if it | |
2355 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 2356 | job_add_to_run_queue(u->job); |
87f0e418 | 2357 | |
b410e6b9 | 2358 | /* Let's check whether this state change constitutes a |
35b8ca3a | 2359 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 2360 | * hence needs to invalidate jobs. */ |
87f0e418 | 2361 | |
ac155bb8 | 2362 | switch (u->job->type) { |
87f0e418 | 2363 | |
b410e6b9 LP |
2364 | case JOB_START: |
2365 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 2366 | |
b410e6b9 | 2367 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
833f92ad | 2368 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 2369 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 2370 | unexpected = true; |
41b02ec7 | 2371 | |
fdf20a31 | 2372 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2373 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
b410e6b9 | 2374 | } |
87f0e418 | 2375 | |
b410e6b9 | 2376 | break; |
87f0e418 | 2377 | |
b410e6b9 LP |
2378 | case JOB_RELOAD: |
2379 | case JOB_RELOAD_OR_START: | |
3282591d | 2380 | case JOB_TRY_RELOAD: |
87f0e418 | 2381 | |
ac155bb8 | 2382 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 2383 | if (ns == UNIT_ACTIVE) |
833f92ad | 2384 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true, false); |
ec2ce0c5 | 2385 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { |
a096ed36 | 2386 | unexpected = true; |
41b02ec7 | 2387 | |
fdf20a31 | 2388 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2389 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
a096ed36 | 2390 | } |
b410e6b9 | 2391 | } |
87f0e418 | 2392 | |
b410e6b9 | 2393 | break; |
87f0e418 | 2394 | |
b410e6b9 LP |
2395 | case JOB_STOP: |
2396 | case JOB_RESTART: | |
2397 | case JOB_TRY_RESTART: | |
87f0e418 | 2398 | |
fdf20a31 | 2399 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2400 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 2401 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 2402 | unexpected = true; |
833f92ad | 2403 | job_finish_and_invalidate(u->job, JOB_FAILED, true, false); |
b410e6b9 | 2404 | } |
87f0e418 | 2405 | |
b410e6b9 | 2406 | break; |
87f0e418 | 2407 | |
b410e6b9 LP |
2408 | default: |
2409 | assert_not_reached("Job type unknown"); | |
87f0e418 | 2410 | } |
87f0e418 | 2411 | |
7e6e7b06 LP |
2412 | } else |
2413 | unexpected = true; | |
2414 | ||
2c289ea8 | 2415 | if (!MANAGER_IS_RELOADING(m)) { |
f3bff0eb | 2416 | |
bdbf9951 LP |
2417 | /* If this state change happened without being |
2418 | * requested by a job, then let's retroactively start | |
2419 | * or stop dependencies. We skip that step when | |
2420 | * deserializing, since we don't want to create any | |
2421 | * additional jobs just because something is already | |
2422 | * activated. */ | |
2423 | ||
2424 | if (unexpected) { | |
2425 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2426 | retroactively_start_dependencies(u); | |
2427 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2428 | retroactively_stop_dependencies(u); | |
2429 | } | |
5de9682c | 2430 | |
cd0504d0 | 2431 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 2432 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
2433 | check_unneeded_dependencies(u); |
2434 | ||
bdbf9951 | 2435 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2436 | log_unit_debug(u, "Unit entered failed state."); |
3ecaa09b | 2437 | unit_start_on_failure(u); |
cd6d0a45 | 2438 | } |
3b2775c5 | 2439 | } |
e537352b | 2440 | |
3b2775c5 LP |
2441 | /* Some names are special */ |
2442 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
2443 | ||
2444 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
865cc19a | 2445 | /* The bus might have just become available, |
3b2775c5 LP |
2446 | * hence try to connect to it, if we aren't |
2447 | * yet connected. */ | |
546ac4f0 | 2448 | bus_init(m, true); |
3b2775c5 | 2449 | |
ac155bb8 | 2450 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 2451 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
2c289ea8 | 2452 | !MANAGER_IS_RELOADING(m)) { |
3b2775c5 | 2453 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 2454 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 2455 | u->in_audit = true; |
3b2775c5 | 2456 | } |
e983b760 | 2457 | |
3b2775c5 | 2458 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 2459 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 2460 | |
3b2775c5 | 2461 | } else { |
915b1d01 LP |
2462 | /* We don't care about D-Bus going down here, since we'll get an asynchronous notification for it |
2463 | * anyway. */ | |
bdbf9951 | 2464 | |
915b1d01 LP |
2465 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && |
2466 | !UNIT_IS_INACTIVE_OR_FAILED(os) | |
2467 | && !MANAGER_IS_RELOADING(m)) { | |
cd6d0a45 | 2468 | |
915b1d01 LP |
2469 | /* This unit just stopped/failed. */ |
2470 | if (u->type == UNIT_SERVICE) { | |
4927fcae | 2471 | |
915b1d01 LP |
2472 | /* Hmm, if there was no start record written |
2473 | * write it now, so that we always have a nice | |
2474 | * pair */ | |
2475 | if (!u->in_audit) { | |
2476 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); | |
cd6d0a45 | 2477 | |
915b1d01 LP |
2478 | if (ns == UNIT_INACTIVE) |
2479 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); | |
2480 | } else | |
2481 | /* Write audit record if we have just finished shutting down */ | |
2482 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); | |
2483 | ||
2484 | u->in_audit = false; | |
2485 | } | |
bdbf9951 | 2486 | |
915b1d01 LP |
2487 | /* Write a log message about consumed resources */ |
2488 | unit_log_resources(u); | |
cd6d0a45 | 2489 | } |
f278026d LP |
2490 | } |
2491 | ||
546ac4f0 | 2492 | manager_recheck_journal(m); |
3ecaa09b | 2493 | unit_trigger_notify(u); |
3b2775c5 | 2494 | |
2c289ea8 | 2495 | if (!MANAGER_IS_RELOADING(u->manager)) { |
ff502445 LP |
2496 | /* Maybe we finished startup and are now ready for |
2497 | * being stopped because unneeded? */ | |
bf6dcfa6 | 2498 | unit_check_unneeded(u); |
c1e1601e | 2499 | |
ff502445 LP |
2500 | /* Maybe we finished startup, but something we needed |
2501 | * has vanished? Let's die then. (This happens when | |
2502 | * something BindsTo= to a Type=oneshot unit, as these | |
2503 | * units go directly from starting to inactive, | |
2504 | * without ever entering started.) */ | |
2505 | unit_check_binds_to(u); | |
2506 | } | |
2507 | ||
c1e1601e | 2508 | unit_add_to_dbus_queue(u); |
701cc384 | 2509 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2510 | } |
2511 | ||
87f0e418 | 2512 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
2513 | int q, r; |
2514 | ||
87f0e418 LP |
2515 | assert(u); |
2516 | assert(pid >= 1); | |
2517 | ||
5ba6985b LP |
2518 | /* Watch a specific PID. We only support one or two units |
2519 | * watching each PID for now, not more. */ | |
2520 | ||
d5099efc | 2521 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2522 | if (r < 0) |
2523 | return r; | |
2524 | ||
d5099efc | 2525 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL); |
a911bb9a LP |
2526 | if (r < 0) |
2527 | return r; | |
2528 | ||
fea72cc0 | 2529 | r = hashmap_put(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
5ba6985b | 2530 | if (r == -EEXIST) { |
d5099efc | 2531 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL); |
5ba6985b LP |
2532 | if (r < 0) |
2533 | return r; | |
05e343b7 | 2534 | |
fea72cc0 | 2535 | r = hashmap_put(u->manager->watch_pids2, PID_TO_PTR(pid), u); |
5ba6985b | 2536 | } |
a911bb9a | 2537 | |
fea72cc0 | 2538 | q = set_put(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2539 | if (q < 0) |
2540 | return q; | |
2541 | ||
2542 | return r; | |
87f0e418 LP |
2543 | } |
2544 | ||
2545 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
2546 | assert(u); | |
2547 | assert(pid >= 1); | |
2548 | ||
fea72cc0 LP |
2549 | (void) hashmap_remove_value(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
2550 | (void) hashmap_remove_value(u->manager->watch_pids2, PID_TO_PTR(pid), u); | |
2551 | (void) set_remove(u->pids, PID_TO_PTR(pid)); | |
a911bb9a LP |
2552 | } |
2553 | ||
bd44e61b LP |
2554 | void unit_unwatch_all_pids(Unit *u) { |
2555 | assert(u); | |
2556 | ||
2557 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2558 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2559 | |
efdb0237 | 2560 | u->pids = set_free(u->pids); |
a911bb9a LP |
2561 | } |
2562 | ||
2563 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2564 | Iterator i; | |
2565 | void *e; | |
2566 | ||
2567 | assert(u); | |
2568 | ||
2569 | /* Cleans dead PIDs from our list */ | |
2570 | ||
2571 | SET_FOREACH(e, u->pids, i) { | |
fea72cc0 | 2572 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2573 | |
2574 | if (pid == except1 || pid == except2) | |
2575 | continue; | |
2576 | ||
9f5650ae | 2577 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2578 | unit_unwatch_pid(u, pid); |
a911bb9a | 2579 | } |
87f0e418 LP |
2580 | } |
2581 | ||
87f0e418 LP |
2582 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2583 | assert(u); | |
2584 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2585 | ||
2586 | switch (j) { | |
2587 | ||
2588 | case JOB_VERIFY_ACTIVE: | |
2589 | case JOB_START: | |
e0209d83 | 2590 | case JOB_NOP: |
f5869324 LP |
2591 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
2592 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueing | |
2593 | * jobs for it. */ | |
87f0e418 LP |
2594 | return true; |
2595 | ||
f5869324 LP |
2596 | case JOB_STOP: |
2597 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
2598 | * external events), hence it makes no sense to permit enqueing such a request either. */ | |
2599 | return !u->perpetual; | |
2600 | ||
87f0e418 LP |
2601 | case JOB_RESTART: |
2602 | case JOB_TRY_RESTART: | |
f5869324 | 2603 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
2604 | |
2605 | case JOB_RELOAD: | |
3282591d | 2606 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2607 | return unit_can_reload(u); |
2608 | ||
2609 | case JOB_RELOAD_OR_START: | |
2610 | return unit_can_reload(u) && unit_can_start(u); | |
2611 | ||
2612 | default: | |
2613 | assert_not_reached("Invalid job type"); | |
2614 | } | |
2615 | } | |
2616 | ||
f2341e0a LP |
2617 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2618 | assert(u); | |
d1fab3fe | 2619 | |
f2341e0a LP |
2620 | /* Only warn about some unit types */ |
2621 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2622 | return; | |
3f3cc397 | 2623 | |
f2341e0a LP |
2624 | if (streq_ptr(u->id, other)) |
2625 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2626 | else | |
2627 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2628 | } |
2629 | ||
eef85c4a LP |
2630 | static int unit_add_dependency_hashmap( |
2631 | Hashmap **h, | |
2632 | Unit *other, | |
2633 | UnitDependencyMask origin_mask, | |
2634 | UnitDependencyMask destination_mask) { | |
2635 | ||
2636 | UnitDependencyInfo info; | |
2637 | int r; | |
2638 | ||
2639 | assert(h); | |
2640 | assert(other); | |
2641 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2642 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2643 | assert(origin_mask > 0 || destination_mask > 0); | |
2644 | ||
2645 | r = hashmap_ensure_allocated(h, NULL); | |
2646 | if (r < 0) | |
2647 | return r; | |
2648 | ||
2649 | assert_cc(sizeof(void*) == sizeof(info)); | |
2650 | ||
2651 | info.data = hashmap_get(*h, other); | |
2652 | if (info.data) { | |
2653 | /* Entry already exists. Add in our mask. */ | |
2654 | ||
2655 | if ((info.origin_mask & origin_mask) == info.origin_mask && | |
2656 | (info.destination_mask & destination_mask) == info.destination_mask) | |
2657 | return 0; /* NOP */ | |
2658 | ||
2659 | info.origin_mask |= origin_mask; | |
2660 | info.destination_mask |= destination_mask; | |
2661 | ||
2662 | r = hashmap_update(*h, other, info.data); | |
2663 | } else { | |
2664 | info = (UnitDependencyInfo) { | |
2665 | .origin_mask = origin_mask, | |
2666 | .destination_mask = destination_mask, | |
2667 | }; | |
2668 | ||
2669 | r = hashmap_put(*h, other, info.data); | |
2670 | } | |
2671 | if (r < 0) | |
2672 | return r; | |
2673 | ||
2674 | return 1; | |
2675 | } | |
2676 | ||
2677 | int unit_add_dependency( | |
2678 | Unit *u, | |
2679 | UnitDependency d, | |
2680 | Unit *other, | |
2681 | bool add_reference, | |
2682 | UnitDependencyMask mask) { | |
87f0e418 LP |
2683 | |
2684 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2685 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 2686 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 2687 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 2688 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2689 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 2690 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 2691 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 2692 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 2693 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2694 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2695 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2696 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2697 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2698 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2699 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2700 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2701 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2702 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2703 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2704 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2705 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2706 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2707 | }; |
eef85c4a LP |
2708 | Unit *original_u = u, *original_other = other; |
2709 | int r; | |
87f0e418 LP |
2710 | |
2711 | assert(u); | |
2712 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2713 | assert(other); |
2714 | ||
9f151f29 LP |
2715 | u = unit_follow_merge(u); |
2716 | other = unit_follow_merge(other); | |
2717 | ||
87f0e418 LP |
2718 | /* We won't allow dependencies on ourselves. We will not |
2719 | * consider them an error however. */ | |
d1fab3fe | 2720 | if (u == other) { |
eef85c4a | 2721 | maybe_warn_about_dependency(original_u, original_other->id, d); |
87f0e418 | 2722 | return 0; |
d1fab3fe | 2723 | } |
87f0e418 | 2724 | |
eef85c4a LP |
2725 | if ((d == UNIT_BEFORE && other->type == UNIT_DEVICE) || |
2726 | (d == UNIT_AFTER && u->type == UNIT_DEVICE)) { | |
dd5e7000 ZJS |
2727 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
2728 | return 0; | |
2729 | } | |
2730 | ||
eef85c4a | 2731 | r = unit_add_dependency_hashmap(u->dependencies + d, other, mask, 0); |
613b411c | 2732 | if (r < 0) |
87f0e418 LP |
2733 | return r; |
2734 | ||
eef85c4a LP |
2735 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2736 | r = unit_add_dependency_hashmap(other->dependencies + inverse_table[d], u, 0, mask); | |
613b411c LP |
2737 | if (r < 0) |
2738 | return r; | |
2739 | } | |
2740 | ||
2741 | if (add_reference) { | |
eef85c4a | 2742 | r = unit_add_dependency_hashmap(u->dependencies + UNIT_REFERENCES, other, mask, 0); |
613b411c | 2743 | if (r < 0) |
5de9682c LP |
2744 | return r; |
2745 | ||
eef85c4a | 2746 | r = unit_add_dependency_hashmap(other->dependencies + UNIT_REFERENCED_BY, u, 0, mask); |
613b411c | 2747 | if (r < 0) |
701cc384 | 2748 | return r; |
613b411c | 2749 | } |
87f0e418 | 2750 | |
c1e1601e | 2751 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
2752 | return 0; |
2753 | } | |
0301abf4 | 2754 | |
eef85c4a | 2755 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
2c966c03 LP |
2756 | int r; |
2757 | ||
2758 | assert(u); | |
2759 | ||
eef85c4a | 2760 | r = unit_add_dependency(u, d, other, add_reference, mask); |
3f3cc397 | 2761 | if (r < 0) |
2c966c03 LP |
2762 | return r; |
2763 | ||
eef85c4a | 2764 | return unit_add_dependency(u, e, other, add_reference, mask); |
2c966c03 LP |
2765 | } |
2766 | ||
7410616c LP |
2767 | static int resolve_template(Unit *u, const char *name, const char*path, char **buf, const char **ret) { |
2768 | int r; | |
9e2f7c11 LP |
2769 | |
2770 | assert(u); | |
2771 | assert(name || path); | |
7410616c LP |
2772 | assert(buf); |
2773 | assert(ret); | |
9e2f7c11 LP |
2774 | |
2775 | if (!name) | |
2b6bf07d | 2776 | name = basename(path); |
9e2f7c11 | 2777 | |
7410616c LP |
2778 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2779 | *buf = NULL; | |
2780 | *ret = name; | |
2781 | return 0; | |
9e2f7c11 LP |
2782 | } |
2783 | ||
ac155bb8 | 2784 | if (u->instance) |
7410616c | 2785 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 2786 | else { |
ae018d9b | 2787 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2788 | |
7410616c LP |
2789 | r = unit_name_to_prefix(u->id, &i); |
2790 | if (r < 0) | |
2791 | return r; | |
9e2f7c11 | 2792 | |
7410616c | 2793 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 2794 | } |
7410616c LP |
2795 | if (r < 0) |
2796 | return r; | |
9e2f7c11 | 2797 | |
7410616c LP |
2798 | *ret = *buf; |
2799 | return 0; | |
9e2f7c11 LP |
2800 | } |
2801 | ||
eef85c4a | 2802 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference, UnitDependencyMask mask) { |
7410616c | 2803 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
2804 | Unit *other; |
2805 | int r; | |
2806 | ||
9e2f7c11 LP |
2807 | assert(u); |
2808 | assert(name || path); | |
09b6b09f | 2809 | |
7410616c LP |
2810 | r = resolve_template(u, name, path, &buf, &name); |
2811 | if (r < 0) | |
2812 | return r; | |
09b6b09f | 2813 | |
8afbb8e1 LP |
2814 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2815 | if (r < 0) | |
2816 | return r; | |
9e2f7c11 | 2817 | |
eef85c4a | 2818 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
2819 | } |
2820 | ||
eef85c4a | 2821 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference, UnitDependencyMask mask) { |
7410616c | 2822 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2823 | Unit *other; |
2824 | int r; | |
2c966c03 LP |
2825 | |
2826 | assert(u); | |
2827 | assert(name || path); | |
2828 | ||
7410616c LP |
2829 | r = resolve_template(u, name, path, &buf, &name); |
2830 | if (r < 0) | |
2831 | return r; | |
2c966c03 | 2832 | |
3f3cc397 LP |
2833 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2834 | if (r < 0) | |
68eda4bd | 2835 | return r; |
2c966c03 | 2836 | |
eef85c4a | 2837 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
2838 | } |
2839 | ||
0301abf4 | 2840 | int set_unit_path(const char *p) { |
0301abf4 | 2841 | /* This is mostly for debug purposes */ |
cbe46ead | 2842 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 2843 | return -errno; |
0301abf4 LP |
2844 | |
2845 | return 0; | |
2846 | } | |
88066b3a | 2847 | |
ea430986 | 2848 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2849 | assert(u); |
2850 | ||
ac155bb8 | 2851 | if (!u->id) |
04ade7d2 LP |
2852 | return NULL; |
2853 | ||
48899192 | 2854 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2855 | } |
2856 | ||
4b58153d LP |
2857 | char *unit_dbus_path_invocation_id(Unit *u) { |
2858 | assert(u); | |
2859 | ||
2860 | if (sd_id128_is_null(u->invocation_id)) | |
2861 | return NULL; | |
2862 | ||
2863 | return unit_dbus_path_from_name(u->invocation_id_string); | |
2864 | } | |
2865 | ||
d79200e2 LP |
2866 | int unit_set_slice(Unit *u, Unit *slice) { |
2867 | assert(u); | |
2868 | assert(slice); | |
2869 | ||
2870 | /* Sets the unit slice if it has not been set before. Is extra | |
2871 | * careful, to only allow this for units that actually have a | |
2872 | * cgroup context. Also, we don't allow to set this for slices | |
2873 | * (since the parent slice is derived from the name). Make | |
2874 | * sure the unit we set is actually a slice. */ | |
2875 | ||
2876 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
2877 | return -EOPNOTSUPP; | |
2878 | ||
2879 | if (u->type == UNIT_SLICE) | |
2880 | return -EINVAL; | |
2881 | ||
102ef982 LP |
2882 | if (unit_active_state(u) != UNIT_INACTIVE) |
2883 | return -EBUSY; | |
2884 | ||
d79200e2 LP |
2885 | if (slice->type != UNIT_SLICE) |
2886 | return -EINVAL; | |
2887 | ||
efdb0237 LP |
2888 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
2889 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
2890 | return -EPERM; | |
2891 | ||
d79200e2 LP |
2892 | if (UNIT_DEREF(u->slice) == slice) |
2893 | return 0; | |
2894 | ||
99e66921 TH |
2895 | /* Disallow slice changes if @u is already bound to cgroups */ |
2896 | if (UNIT_ISSET(u->slice) && u->cgroup_realized) | |
d79200e2 LP |
2897 | return -EBUSY; |
2898 | ||
99e66921 | 2899 | unit_ref_unset(&u->slice); |
d79200e2 LP |
2900 | unit_ref_set(&u->slice, slice); |
2901 | return 1; | |
2902 | } | |
2903 | ||
2904 | int unit_set_default_slice(Unit *u) { | |
a8833944 LP |
2905 | _cleanup_free_ char *b = NULL; |
2906 | const char *slice_name; | |
a016b922 LP |
2907 | Unit *slice; |
2908 | int r; | |
2909 | ||
2910 | assert(u); | |
2911 | ||
9444b1f2 | 2912 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2913 | return 0; |
2914 | ||
a8833944 LP |
2915 | if (u->instance) { |
2916 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2917 | |
a8833944 LP |
2918 | /* Implicitly place all instantiated units in their |
2919 | * own per-template slice */ | |
2920 | ||
7410616c LP |
2921 | r = unit_name_to_prefix(u->id, &prefix); |
2922 | if (r < 0) | |
2923 | return r; | |
a8833944 LP |
2924 | |
2925 | /* The prefix is already escaped, but it might include | |
2926 | * "-" which has a special meaning for slice units, | |
2927 | * hence escape it here extra. */ | |
7410616c | 2928 | escaped = unit_name_escape(prefix); |
a8833944 LP |
2929 | if (!escaped) |
2930 | return -ENOMEM; | |
2931 | ||
463d0d15 | 2932 | if (MANAGER_IS_SYSTEM(u->manager)) |
605405c6 | 2933 | b = strjoin("system-", escaped, ".slice"); |
a8833944 LP |
2934 | else |
2935 | b = strappend(escaped, ".slice"); | |
2936 | if (!b) | |
2937 | return -ENOMEM; | |
2938 | ||
2939 | slice_name = b; | |
2940 | } else | |
2941 | slice_name = | |
463d0d15 | 2942 | MANAGER_IS_SYSTEM(u->manager) && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
2943 | ? SPECIAL_SYSTEM_SLICE |
2944 | : SPECIAL_ROOT_SLICE; | |
2945 | ||
2946 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2947 | if (r < 0) |
2948 | return r; | |
2949 | ||
d79200e2 | 2950 | return unit_set_slice(u, slice); |
a016b922 LP |
2951 | } |
2952 | ||
9444b1f2 LP |
2953 | const char *unit_slice_name(Unit *u) { |
2954 | assert(u); | |
2955 | ||
2956 | if (!UNIT_ISSET(u->slice)) | |
2957 | return NULL; | |
2958 | ||
2959 | return UNIT_DEREF(u->slice)->id; | |
2960 | } | |
2961 | ||
f6ff8c29 | 2962 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2963 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2964 | int r; |
2965 | ||
2966 | assert(u); | |
2967 | assert(type); | |
2968 | assert(_found); | |
2969 | ||
7410616c LP |
2970 | r = unit_name_change_suffix(u->id, type, &t); |
2971 | if (r < 0) | |
2972 | return r; | |
2973 | if (unit_has_name(u, t)) | |
2974 | return -EINVAL; | |
f6ff8c29 | 2975 | |
ac155bb8 | 2976 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2977 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2978 | return r; |
2979 | } | |
2980 | ||
bbc29086 DM |
2981 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
2982 | const char *name, *old_owner, *new_owner; | |
2983 | Unit *u = userdata; | |
2984 | int r; | |
2985 | ||
2986 | assert(message); | |
2987 | assert(u); | |
2988 | ||
2989 | r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner); | |
2990 | if (r < 0) { | |
2991 | bus_log_parse_error(r); | |
2992 | return 0; | |
2993 | } | |
2994 | ||
b0076268 MK |
2995 | old_owner = isempty(old_owner) ? NULL : old_owner; |
2996 | new_owner = isempty(new_owner) ? NULL : new_owner; | |
2997 | ||
bbc29086 DM |
2998 | if (UNIT_VTABLE(u)->bus_name_owner_change) |
2999 | UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); | |
3000 | ||
3001 | return 0; | |
3002 | } | |
3003 | ||
9806e87d LP |
3004 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3005 | const char *match; | |
bbc29086 | 3006 | |
9806e87d LP |
3007 | assert(u); |
3008 | assert(bus); | |
3009 | assert(name); | |
bbc29086 DM |
3010 | |
3011 | if (u->match_bus_slot) | |
3012 | return -EBUSY; | |
3013 | ||
9806e87d | 3014 | match = strjoina("type='signal'," |
81d62103 ZJS |
3015 | "sender='org.freedesktop.DBus'," |
3016 | "path='/org/freedesktop/DBus'," | |
3017 | "interface='org.freedesktop.DBus'," | |
3018 | "member='NameOwnerChanged'," | |
3019 | "arg0='", name, "'"); | |
bbc29086 DM |
3020 | |
3021 | return sd_bus_add_match(bus, &u->match_bus_slot, match, signal_name_owner_changed, u); | |
3022 | } | |
3023 | ||
05e343b7 | 3024 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3025 | int r; |
3026 | ||
05e343b7 LP |
3027 | assert(u); |
3028 | assert(name); | |
3029 | ||
3030 | /* Watch a specific name on the bus. We only support one unit | |
3031 | * watching each name for now. */ | |
3032 | ||
bbc29086 DM |
3033 | if (u->manager->api_bus) { |
3034 | /* If the bus is already available, install the match directly. | |
3035 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3036 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3037 | if (r < 0) |
8ea823b6 | 3038 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3039 | } |
3040 | ||
3041 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3042 | if (r < 0) { | |
3043 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3044 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); | |
3045 | } | |
3046 | ||
3047 | return 0; | |
05e343b7 LP |
3048 | } |
3049 | ||
3050 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3051 | assert(u); | |
3052 | assert(name); | |
3053 | ||
8367fea5 | 3054 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3055 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
05e343b7 LP |
3056 | } |
3057 | ||
a16e1123 LP |
3058 | bool unit_can_serialize(Unit *u) { |
3059 | assert(u); | |
3060 | ||
3061 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
3062 | } | |
3063 | ||
8b108bd0 FB |
3064 | static int unit_serialize_cgroup_mask(FILE *f, const char *key, CGroupMask mask) { |
3065 | _cleanup_free_ char *s = NULL; | |
3066 | int r = 0; | |
3067 | ||
3068 | assert(f); | |
3069 | assert(key); | |
3070 | ||
3071 | if (mask != 0) { | |
3072 | r = cg_mask_to_string(mask, &s); | |
3073 | if (r >= 0) { | |
3074 | fputs(key, f); | |
3075 | fputc('=', f); | |
3076 | fputs(s, f); | |
3077 | fputc('\n', f); | |
3078 | } | |
3079 | } | |
3080 | return r; | |
3081 | } | |
3082 | ||
6b659ed8 LP |
3083 | static const char *ip_accounting_metric_field[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { |
3084 | [CGROUP_IP_INGRESS_BYTES] = "ip-accounting-ingress-bytes", | |
3085 | [CGROUP_IP_INGRESS_PACKETS] = "ip-accounting-ingress-packets", | |
3086 | [CGROUP_IP_EGRESS_BYTES] = "ip-accounting-egress-bytes", | |
3087 | [CGROUP_IP_EGRESS_PACKETS] = "ip-accounting-egress-packets", | |
3088 | }; | |
3089 | ||
6b78f9b4 | 3090 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
6b659ed8 | 3091 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3092 | int r; |
3093 | ||
3094 | assert(u); | |
3095 | assert(f); | |
3096 | assert(fds); | |
3097 | ||
9bdb98c5 LP |
3098 | if (unit_can_serialize(u)) { |
3099 | ExecRuntime *rt; | |
a16e1123 | 3100 | |
9bdb98c5 | 3101 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
3102 | if (r < 0) |
3103 | return r; | |
9bdb98c5 LP |
3104 | |
3105 | rt = unit_get_exec_runtime(u); | |
3106 | if (rt) { | |
f2341e0a | 3107 | r = exec_runtime_serialize(u, rt, f, fds); |
9bdb98c5 LP |
3108 | if (r < 0) |
3109 | return r; | |
3110 | } | |
e0209d83 MS |
3111 | } |
3112 | ||
a483fb59 LP |
3113 | dual_timestamp_serialize(f, "state-change-timestamp", &u->state_change_timestamp); |
3114 | ||
ac155bb8 MS |
3115 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
3116 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
3117 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
3118 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
a483fb59 | 3119 | |
ac155bb8 | 3120 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); |
59fccdc5 | 3121 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 3122 | |
ac155bb8 MS |
3123 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
3124 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 3125 | |
59fccdc5 LP |
3126 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
3127 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
3128 | ||
c2756a68 | 3129 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
fe700f46 | 3130 | |
d3070fbd LP |
3131 | unit_serialize_item(u, f, "exported-invocation-id", yes_no(u->exported_invocation_id)); |
3132 | unit_serialize_item(u, f, "exported-log-level-max", yes_no(u->exported_log_level_max)); | |
3133 | unit_serialize_item(u, f, "exported-log-extra-fields", yes_no(u->exported_log_extra_fields)); | |
3134 | ||
66ebf6c0 | 3135 | unit_serialize_item_format(u, f, "cpu-usage-base", "%" PRIu64, u->cpu_usage_base); |
fe700f46 LP |
3136 | if (u->cpu_usage_last != NSEC_INFINITY) |
3137 | unit_serialize_item_format(u, f, "cpu-usage-last", "%" PRIu64, u->cpu_usage_last); | |
c2756a68 LP |
3138 | |
3139 | if (u->cgroup_path) | |
3140 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
de1d4f9b | 3141 | unit_serialize_item(u, f, "cgroup-realized", yes_no(u->cgroup_realized)); |
8b108bd0 FB |
3142 | (void) unit_serialize_cgroup_mask(f, "cgroup-realized-mask", u->cgroup_realized_mask); |
3143 | (void) unit_serialize_cgroup_mask(f, "cgroup-enabled-mask", u->cgroup_enabled_mask); | |
906c06f6 | 3144 | unit_serialize_item_format(u, f, "cgroup-bpf-realized", "%i", u->cgroup_bpf_state); |
c2756a68 | 3145 | |
00d9ef85 LP |
3146 | if (uid_is_valid(u->ref_uid)) |
3147 | unit_serialize_item_format(u, f, "ref-uid", UID_FMT, u->ref_uid); | |
3148 | if (gid_is_valid(u->ref_gid)) | |
3149 | unit_serialize_item_format(u, f, "ref-gid", GID_FMT, u->ref_gid); | |
3150 | ||
4b58153d LP |
3151 | if (!sd_id128_is_null(u->invocation_id)) |
3152 | unit_serialize_item_format(u, f, "invocation-id", SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
3153 | ||
05a98afd LP |
3154 | bus_track_serialize(u->bus_track, f, "ref"); |
3155 | ||
6b659ed8 LP |
3156 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
3157 | uint64_t v; | |
3158 | ||
3159 | r = unit_get_ip_accounting(u, m, &v); | |
3160 | if (r >= 0) | |
3161 | unit_serialize_item_format(u, f, ip_accounting_metric_field[m], "%" PRIu64, v); | |
3162 | } | |
3163 | ||
613b411c LP |
3164 | if (serialize_jobs) { |
3165 | if (u->job) { | |
3166 | fprintf(f, "job\n"); | |
05a98afd | 3167 | job_serialize(u->job, f); |
613b411c LP |
3168 | } |
3169 | ||
3170 | if (u->nop_job) { | |
3171 | fprintf(f, "job\n"); | |
05a98afd | 3172 | job_serialize(u->nop_job, f); |
613b411c LP |
3173 | } |
3174 | } | |
3175 | ||
a16e1123 LP |
3176 | /* End marker */ |
3177 | fputc('\n', f); | |
3178 | return 0; | |
3179 | } | |
3180 | ||
a34ceba6 LP |
3181 | int unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { |
3182 | assert(u); | |
3183 | assert(f); | |
3184 | assert(key); | |
3185 | ||
3186 | if (!value) | |
3187 | return 0; | |
3188 | ||
3189 | fputs(key, f); | |
3190 | fputc('=', f); | |
3191 | fputs(value, f); | |
3192 | fputc('\n', f); | |
3193 | ||
3194 | return 1; | |
3195 | } | |
3196 | ||
3197 | int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *value) { | |
3198 | _cleanup_free_ char *c = NULL; | |
3199 | ||
3200 | assert(u); | |
3201 | assert(f); | |
3202 | assert(key); | |
3203 | ||
3204 | if (!value) | |
3205 | return 0; | |
3206 | ||
3207 | c = cescape(value); | |
3208 | if (!c) | |
3209 | return -ENOMEM; | |
3210 | ||
3211 | fputs(key, f); | |
3212 | fputc('=', f); | |
3213 | fputs(c, f); | |
3214 | fputc('\n', f); | |
3215 | ||
3216 | return 1; | |
3217 | } | |
3218 | ||
3219 | int unit_serialize_item_fd(Unit *u, FILE *f, FDSet *fds, const char *key, int fd) { | |
3220 | int copy; | |
3221 | ||
3222 | assert(u); | |
3223 | assert(f); | |
3224 | assert(key); | |
3225 | ||
3226 | if (fd < 0) | |
3227 | return 0; | |
3228 | ||
3229 | copy = fdset_put_dup(fds, fd); | |
3230 | if (copy < 0) | |
3231 | return copy; | |
3232 | ||
3233 | fprintf(f, "%s=%i\n", key, copy); | |
3234 | return 1; | |
3235 | } | |
3236 | ||
a16e1123 LP |
3237 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { |
3238 | va_list ap; | |
3239 | ||
3240 | assert(u); | |
3241 | assert(f); | |
3242 | assert(key); | |
3243 | assert(format); | |
3244 | ||
3245 | fputs(key, f); | |
3246 | fputc('=', f); | |
3247 | ||
3248 | va_start(ap, format); | |
3249 | vfprintf(f, format, ap); | |
3250 | va_end(ap); | |
3251 | ||
3252 | fputc('\n', f); | |
3253 | } | |
3254 | ||
a16e1123 | 3255 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
28b99ccd | 3256 | ExecRuntime **rt = NULL; |
9bdb98c5 | 3257 | size_t offset; |
a16e1123 LP |
3258 | int r; |
3259 | ||
3260 | assert(u); | |
3261 | assert(f); | |
3262 | assert(fds); | |
3263 | ||
613b411c LP |
3264 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
3265 | if (offset > 0) | |
3266 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
3267 | ||
a16e1123 | 3268 | for (;;) { |
20c03b7b | 3269 | char line[LINE_MAX], *l, *v; |
6b659ed8 | 3270 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3271 | size_t k; |
3272 | ||
3273 | if (!fgets(line, sizeof(line), f)) { | |
3274 | if (feof(f)) | |
3275 | return 0; | |
3276 | return -errno; | |
3277 | } | |
3278 | ||
10f8e83c | 3279 | char_array_0(line); |
a16e1123 LP |
3280 | l = strstrip(line); |
3281 | ||
3282 | /* End marker */ | |
e911de99 | 3283 | if (isempty(l)) |
a483fb59 | 3284 | break; |
a16e1123 LP |
3285 | |
3286 | k = strcspn(l, "="); | |
3287 | ||
3288 | if (l[k] == '=') { | |
3289 | l[k] = 0; | |
3290 | v = l+k+1; | |
3291 | } else | |
3292 | v = l+k; | |
3293 | ||
cca098b0 | 3294 | if (streq(l, "job")) { |
39a18c60 MS |
3295 | if (v[0] == '\0') { |
3296 | /* new-style serialized job */ | |
9c3349e2 LP |
3297 | Job *j; |
3298 | ||
3299 | j = job_new_raw(u); | |
39a18c60 | 3300 | if (!j) |
e911de99 | 3301 | return log_oom(); |
39a18c60 | 3302 | |
05a98afd | 3303 | r = job_deserialize(j, f); |
39a18c60 MS |
3304 | if (r < 0) { |
3305 | job_free(j); | |
3306 | return r; | |
3307 | } | |
cca098b0 | 3308 | |
39a18c60 MS |
3309 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
3310 | if (r < 0) { | |
3311 | job_free(j); | |
3312 | return r; | |
3313 | } | |
e0209d83 MS |
3314 | |
3315 | r = job_install_deserialized(j); | |
3316 | if (r < 0) { | |
3317 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
3318 | job_free(j); | |
3319 | return r; | |
3320 | } | |
ed10fa8c LP |
3321 | } else /* legacy for pre-44 */ |
3322 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); | |
cca098b0 | 3323 | continue; |
a483fb59 LP |
3324 | } else if (streq(l, "state-change-timestamp")) { |
3325 | dual_timestamp_deserialize(v, &u->state_change_timestamp); | |
3326 | continue; | |
8aaf019b | 3327 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 3328 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
3329 | continue; |
3330 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 3331 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
3332 | continue; |
3333 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 3334 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
3335 | continue; |
3336 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 3337 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 3338 | continue; |
2791a8f8 | 3339 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 3340 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 3341 | continue; |
59fccdc5 LP |
3342 | } else if (streq(l, "assert-timestamp")) { |
3343 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
3344 | continue; | |
2791a8f8 | 3345 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 3346 | |
e911de99 LP |
3347 | r = parse_boolean(v); |
3348 | if (r < 0) | |
f2341e0a | 3349 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 3350 | else |
e911de99 | 3351 | u->condition_result = r; |
efbac6d2 LP |
3352 | |
3353 | continue; | |
c2756a68 | 3354 | |
59fccdc5 | 3355 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 3356 | |
e911de99 LP |
3357 | r = parse_boolean(v); |
3358 | if (r < 0) | |
f2341e0a | 3359 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 3360 | else |
e911de99 | 3361 | u->assert_result = r; |
59fccdc5 LP |
3362 | |
3363 | continue; | |
3364 | ||
c2756a68 | 3365 | } else if (streq(l, "transient")) { |
c2756a68 | 3366 | |
e911de99 LP |
3367 | r = parse_boolean(v); |
3368 | if (r < 0) | |
f2341e0a | 3369 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 3370 | else |
e911de99 | 3371 | u->transient = r; |
c2756a68 LP |
3372 | |
3373 | continue; | |
e911de99 | 3374 | |
d3070fbd LP |
3375 | } else if (streq(l, "exported-invocation-id")) { |
3376 | ||
3377 | r = parse_boolean(v); | |
3378 | if (r < 0) | |
3379 | log_unit_debug(u, "Failed to parse exported invocation ID bool %s, ignoring.", v); | |
3380 | else | |
3381 | u->exported_invocation_id = r; | |
3382 | ||
3383 | continue; | |
3384 | ||
3385 | } else if (streq(l, "exported-log-level-max")) { | |
3386 | ||
3387 | r = parse_boolean(v); | |
3388 | if (r < 0) | |
3389 | log_unit_debug(u, "Failed to parse exported log level max bool %s, ignoring.", v); | |
3390 | else | |
3391 | u->exported_log_level_max = r; | |
3392 | ||
3393 | continue; | |
3394 | ||
3395 | } else if (streq(l, "exported-log-extra-fields")) { | |
3396 | ||
3397 | r = parse_boolean(v); | |
3398 | if (r < 0) | |
3399 | log_unit_debug(u, "Failed to parse exported log extra fields bool %s, ignoring.", v); | |
3400 | else | |
3401 | u->exported_log_extra_fields = r; | |
3402 | ||
3403 | continue; | |
3404 | ||
fe700f46 | 3405 | } else if (STR_IN_SET(l, "cpu-usage-base", "cpuacct-usage-base")) { |
5ad096b3 | 3406 | |
66ebf6c0 | 3407 | r = safe_atou64(v, &u->cpu_usage_base); |
5ad096b3 | 3408 | if (r < 0) |
fe700f46 LP |
3409 | log_unit_debug(u, "Failed to parse CPU usage base %s, ignoring.", v); |
3410 | ||
3411 | continue; | |
3412 | ||
3413 | } else if (streq(l, "cpu-usage-last")) { | |
3414 | ||
3415 | r = safe_atou64(v, &u->cpu_usage_last); | |
3416 | if (r < 0) | |
3417 | log_unit_debug(u, "Failed to read CPU usage last %s, ignoring.", v); | |
5ad096b3 | 3418 | |
0f908397 | 3419 | continue; |
4e595329 | 3420 | |
e911de99 | 3421 | } else if (streq(l, "cgroup")) { |
72673e86 | 3422 | |
e911de99 LP |
3423 | r = unit_set_cgroup_path(u, v); |
3424 | if (r < 0) | |
f2341e0a | 3425 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 3426 | |
efdb0237 LP |
3427 | (void) unit_watch_cgroup(u); |
3428 | ||
de1d4f9b WF |
3429 | continue; |
3430 | } else if (streq(l, "cgroup-realized")) { | |
3431 | int b; | |
3432 | ||
3433 | b = parse_boolean(v); | |
3434 | if (b < 0) | |
3435 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
3436 | else | |
3437 | u->cgroup_realized = b; | |
3438 | ||
c2756a68 | 3439 | continue; |
00d9ef85 | 3440 | |
8b108bd0 FB |
3441 | } else if (streq(l, "cgroup-realized-mask")) { |
3442 | ||
3443 | r = cg_mask_from_string(v, &u->cgroup_realized_mask); | |
3444 | if (r < 0) | |
3445 | log_unit_debug(u, "Failed to parse cgroup-realized-mask %s, ignoring.", v); | |
3446 | continue; | |
3447 | ||
3448 | } else if (streq(l, "cgroup-enabled-mask")) { | |
3449 | ||
3450 | r = cg_mask_from_string(v, &u->cgroup_enabled_mask); | |
3451 | if (r < 0) | |
3452 | log_unit_debug(u, "Failed to parse cgroup-enabled-mask %s, ignoring.", v); | |
3453 | continue; | |
3454 | ||
906c06f6 DM |
3455 | } else if (streq(l, "cgroup-bpf-realized")) { |
3456 | int i; | |
3457 | ||
3458 | r = safe_atoi(v, &i); | |
3459 | if (r < 0) | |
3460 | log_unit_debug(u, "Failed to parse cgroup BPF state %s, ignoring.", v); | |
3461 | else | |
3462 | u->cgroup_bpf_state = | |
3463 | i < 0 ? UNIT_CGROUP_BPF_INVALIDATED : | |
3464 | i > 0 ? UNIT_CGROUP_BPF_ON : | |
3465 | UNIT_CGROUP_BPF_OFF; | |
3466 | ||
3467 | continue; | |
3468 | ||
00d9ef85 LP |
3469 | } else if (streq(l, "ref-uid")) { |
3470 | uid_t uid; | |
3471 | ||
3472 | r = parse_uid(v, &uid); | |
3473 | if (r < 0) | |
3474 | log_unit_debug(u, "Failed to parse referenced UID %s, ignoring.", v); | |
3475 | else | |
3476 | unit_ref_uid_gid(u, uid, GID_INVALID); | |
3477 | ||
3478 | continue; | |
3479 | ||
3480 | } else if (streq(l, "ref-gid")) { | |
3481 | gid_t gid; | |
3482 | ||
3483 | r = parse_gid(v, &gid); | |
3484 | if (r < 0) | |
3485 | log_unit_debug(u, "Failed to parse referenced GID %s, ignoring.", v); | |
3486 | else | |
3487 | unit_ref_uid_gid(u, UID_INVALID, gid); | |
3488 | ||
05a98afd LP |
3489 | } else if (streq(l, "ref")) { |
3490 | ||
3491 | r = strv_extend(&u->deserialized_refs, v); | |
3492 | if (r < 0) | |
3493 | log_oom(); | |
3494 | ||
4b58153d LP |
3495 | continue; |
3496 | } else if (streq(l, "invocation-id")) { | |
3497 | sd_id128_t id; | |
3498 | ||
3499 | r = sd_id128_from_string(v, &id); | |
3500 | if (r < 0) | |
3501 | log_unit_debug(u, "Failed to parse invocation id %s, ignoring.", v); | |
3502 | else { | |
3503 | r = unit_set_invocation_id(u, id); | |
3504 | if (r < 0) | |
3505 | log_unit_warning_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
3506 | } | |
3507 | ||
00d9ef85 | 3508 | continue; |
8aaf019b | 3509 | } |
cca098b0 | 3510 | |
6b659ed8 LP |
3511 | /* Check if this is an IP accounting metric serialization field */ |
3512 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) | |
3513 | if (streq(l, ip_accounting_metric_field[m])) | |
3514 | break; | |
3515 | if (m < _CGROUP_IP_ACCOUNTING_METRIC_MAX) { | |
3516 | uint64_t c; | |
3517 | ||
3518 | r = safe_atou64(v, &c); | |
3519 | if (r < 0) | |
3520 | log_unit_debug(u, "Failed to parse IP accounting value %s, ignoring.", v); | |
3521 | else | |
3522 | u->ip_accounting_extra[m] = c; | |
3523 | continue; | |
3524 | } | |
3525 | ||
9bdb98c5 LP |
3526 | if (unit_can_serialize(u)) { |
3527 | if (rt) { | |
f2341e0a | 3528 | r = exec_runtime_deserialize_item(u, rt, l, v, fds); |
e911de99 | 3529 | if (r < 0) { |
f2341e0a | 3530 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); |
e911de99 LP |
3531 | continue; |
3532 | } | |
3533 | ||
3534 | /* Returns positive if key was handled by the call */ | |
9bdb98c5 LP |
3535 | if (r > 0) |
3536 | continue; | |
3537 | } | |
3538 | ||
3539 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); | |
613b411c | 3540 | if (r < 0) |
f2341e0a | 3541 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 3542 | } |
a16e1123 | 3543 | } |
a483fb59 LP |
3544 | |
3545 | /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is | |
3546 | * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from | |
1f133e0d | 3547 | * before 228 where the base for timeouts was not persistent across reboots. */ |
a483fb59 LP |
3548 | |
3549 | if (!dual_timestamp_is_set(&u->state_change_timestamp)) | |
3550 | dual_timestamp_get(&u->state_change_timestamp); | |
3551 | ||
58d83430 LP |
3552 | /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied |
3553 | * after we are done. For that we invalidate anything already realized, so that we can realize it again. */ | |
3554 | unit_invalidate_cgroup(u, _CGROUP_MASK_ALL); | |
3555 | unit_invalidate_cgroup_bpf(u); | |
3556 | ||
a483fb59 | 3557 | return 0; |
a16e1123 LP |
3558 | } |
3559 | ||
07429866 ZJS |
3560 | void unit_deserialize_skip(FILE *f) { |
3561 | assert(f); | |
3562 | ||
3563 | /* Skip serialized data for this unit. We don't know what it is. */ | |
3564 | ||
3565 | for (;;) { | |
3566 | char line[LINE_MAX], *l; | |
3567 | ||
3568 | if (!fgets(line, sizeof line, f)) | |
3569 | return; | |
3570 | ||
3571 | char_array_0(line); | |
3572 | l = strstrip(line); | |
3573 | ||
3574 | /* End marker */ | |
3575 | if (isempty(l)) | |
3576 | return; | |
3577 | } | |
3578 | } | |
3579 | ||
3580 | ||
eef85c4a | 3581 | int unit_add_node_dependency(Unit *u, const char *what, bool wants, UnitDependency dep, UnitDependencyMask mask) { |
6e2ef85b | 3582 | Unit *device; |
68eda4bd | 3583 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
3584 | int r; |
3585 | ||
3586 | assert(u); | |
3587 | ||
6e2ef85b | 3588 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3589 | if (isempty(what)) |
3590 | return 0; | |
6e2ef85b | 3591 | |
8407a5d0 | 3592 | if (!is_device_path(what)) |
6e2ef85b LP |
3593 | return 0; |
3594 | ||
47bc12e1 LP |
3595 | /* When device units aren't supported (such as in a |
3596 | * container), don't create dependencies on them. */ | |
1c2e9646 | 3597 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3598 | return 0; |
3599 | ||
7410616c LP |
3600 | r = unit_name_from_path(what, ".device", &e); |
3601 | if (r < 0) | |
3602 | return r; | |
6e2ef85b | 3603 | |
ac155bb8 | 3604 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3605 | if (r < 0) |
3606 | return r; | |
3607 | ||
ebc8968b FB |
3608 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3609 | dep = UNIT_BINDS_TO; | |
3610 | ||
9d06297e | 3611 | r = unit_add_two_dependencies(u, UNIT_AFTER, |
463d0d15 | 3612 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, |
eef85c4a | 3613 | device, true, mask); |
faa368e3 | 3614 | if (r < 0) |
6e2ef85b LP |
3615 | return r; |
3616 | ||
faa368e3 | 3617 | if (wants) { |
eef85c4a | 3618 | r = unit_add_dependency(device, UNIT_WANTS, u, false, mask); |
faa368e3 | 3619 | if (r < 0) |
6e2ef85b | 3620 | return r; |
faa368e3 | 3621 | } |
6e2ef85b LP |
3622 | |
3623 | return 0; | |
3624 | } | |
a16e1123 | 3625 | |
be847e82 | 3626 | int unit_coldplug(Unit *u) { |
05a98afd LP |
3627 | int r = 0, q; |
3628 | char **i; | |
cca098b0 LP |
3629 | |
3630 | assert(u); | |
3631 | ||
f78f265f LP |
3632 | /* Make sure we don't enter a loop, when coldplugging |
3633 | * recursively. */ | |
3634 | if (u->coldplugged) | |
3635 | return 0; | |
3636 | ||
3637 | u->coldplugged = true; | |
3638 | ||
05a98afd LP |
3639 | STRV_FOREACH(i, u->deserialized_refs) { |
3640 | q = bus_unit_track_add_name(u, *i); | |
3641 | if (q < 0 && r >= 0) | |
3642 | r = q; | |
3643 | } | |
3644 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 3645 | |
05a98afd LP |
3646 | if (UNIT_VTABLE(u)->coldplug) { |
3647 | q = UNIT_VTABLE(u)->coldplug(u); | |
3648 | if (q < 0 && r >= 0) | |
3649 | r = q; | |
3650 | } | |
5a6158b6 | 3651 | |
05a98afd LP |
3652 | if (u->job) { |
3653 | q = job_coldplug(u->job); | |
3654 | if (q < 0 && r >= 0) | |
3655 | r = q; | |
3656 | } | |
cca098b0 | 3657 | |
05a98afd | 3658 | return r; |
cca098b0 LP |
3659 | } |
3660 | ||
ba25d39e | 3661 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3662 | struct stat st; |
3663 | ||
3664 | if (!path) | |
3665 | return false; | |
3666 | ||
77969722 LP |
3667 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3668 | * are never out-of-date. */ | |
3669 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3670 | return false; | |
3671 | ||
21b95806 ZJS |
3672 | if (stat(path, &st) < 0) |
3673 | /* What, cannot access this anymore? */ | |
3674 | return true; | |
3675 | ||
ba25d39e ZJS |
3676 | if (path_masked) |
3677 | /* For masked files check if they are still so */ | |
3678 | return !null_or_empty(&st); | |
3679 | else | |
3a8db9fe | 3680 | /* For non-empty files check the mtime */ |
87ec20ef | 3681 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3682 | |
3683 | return false; | |
3684 | } | |
3685 | ||
45fb0699 | 3686 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
3687 | _cleanup_strv_free_ char **t = NULL; |
3688 | char **path; | |
1b64d026 | 3689 | |
45fb0699 LP |
3690 | assert(u); |
3691 | ||
ba25d39e ZJS |
3692 | /* For unit files, we allow masking… */ |
3693 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3694 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3695 | return true; |
5f4b19f4 | 3696 | |
ba25d39e ZJS |
3697 | /* Source paths should not be masked… */ |
3698 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3699 | return true; |
ae7a7182 | 3700 | |
19a44dfe LR |
3701 | if (u->load_state == UNIT_LOADED) |
3702 | (void) unit_find_dropin_paths(u, &t); | |
ab932a62 LP |
3703 | if (!strv_equal(u->dropin_paths, t)) |
3704 | return true; | |
6d10d308 | 3705 | |
ba25d39e | 3706 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3707 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3708 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3709 | return true; |
21b95806 | 3710 | |
ab932a62 | 3711 | return false; |
45fb0699 LP |
3712 | } |
3713 | ||
fdf20a31 | 3714 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3715 | assert(u); |
3716 | ||
fdf20a31 MM |
3717 | if (UNIT_VTABLE(u)->reset_failed) |
3718 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 LP |
3719 | |
3720 | RATELIMIT_RESET(u->start_limit); | |
3721 | u->start_limit_hit = false; | |
5632e374 LP |
3722 | } |
3723 | ||
a7f241db LP |
3724 | Unit *unit_following(Unit *u) { |
3725 | assert(u); | |
3726 | ||
3727 | if (UNIT_VTABLE(u)->following) | |
3728 | return UNIT_VTABLE(u)->following(u); | |
3729 | ||
3730 | return NULL; | |
3731 | } | |
3732 | ||
31afa0a4 | 3733 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3734 | assert(u); |
3735 | ||
31afa0a4 LP |
3736 | /* This call does check the current state of the unit. It's |
3737 | * hence useful to be called from state change calls of the | |
3738 | * unit itself, where the state isn't updated yet. This is | |
3739 | * different from unit_inactive_or_pending() which checks both | |
3740 | * the current state and for a queued job. */ | |
18ffdfda | 3741 | |
31afa0a4 LP |
3742 | return u->job && u->job->type == JOB_STOP; |
3743 | } | |
3744 | ||
3745 | bool unit_inactive_or_pending(Unit *u) { | |
3746 | assert(u); | |
3747 | ||
3748 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3749 | |
d956ac29 LP |
3750 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3751 | return true; | |
3752 | ||
31afa0a4 | 3753 | if (unit_stop_pending(u)) |
18ffdfda LP |
3754 | return true; |
3755 | ||
3756 | return false; | |
3757 | } | |
3758 | ||
31afa0a4 | 3759 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3760 | assert(u); |
3761 | ||
f60c2665 | 3762 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3763 | |
3764 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3765 | return true; | |
3766 | ||
ac155bb8 | 3767 | if (u->job && |
3742095b | 3768 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
3769 | return true; |
3770 | ||
3771 | return false; | |
3772 | } | |
3773 | ||
718db961 | 3774 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3775 | assert(u); |
3776 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 3777 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 3778 | |
8a0867d6 | 3779 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3780 | return -EOPNOTSUPP; |
8a0867d6 | 3781 | |
c74f17d9 | 3782 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3783 | } |
3784 | ||
82659fd7 LP |
3785 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
3786 | Set *pid_set; | |
3787 | int r; | |
3788 | ||
d5099efc | 3789 | pid_set = set_new(NULL); |
82659fd7 LP |
3790 | if (!pid_set) |
3791 | return NULL; | |
3792 | ||
3793 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3794 | if (main_pid > 0) { | |
fea72cc0 | 3795 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 LP |
3796 | if (r < 0) |
3797 | goto fail; | |
3798 | } | |
3799 | ||
3800 | if (control_pid > 0) { | |
fea72cc0 | 3801 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 LP |
3802 | if (r < 0) |
3803 | goto fail; | |
3804 | } | |
3805 | ||
3806 | return pid_set; | |
3807 | ||
3808 | fail: | |
3809 | set_free(pid_set); | |
3810 | return NULL; | |
3811 | } | |
3812 | ||
d91c34f2 LP |
3813 | int unit_kill_common( |
3814 | Unit *u, | |
3815 | KillWho who, | |
3816 | int signo, | |
3817 | pid_t main_pid, | |
3818 | pid_t control_pid, | |
718db961 | 3819 | sd_bus_error *error) { |
d91c34f2 | 3820 | |
814cc562 | 3821 | int r = 0; |
ac5e3a50 | 3822 | bool killed = false; |
814cc562 | 3823 | |
ac5e3a50 | 3824 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3825 | if (main_pid < 0) |
7358dc02 | 3826 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 3827 | else if (main_pid == 0) |
7358dc02 | 3828 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3829 | } |
3830 | ||
ac5e3a50 | 3831 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3832 | if (control_pid < 0) |
7358dc02 | 3833 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 3834 | else if (control_pid == 0) |
7358dc02 | 3835 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3836 | } |
3837 | ||
ac5e3a50 JS |
3838 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3839 | if (control_pid > 0) { | |
814cc562 MS |
3840 | if (kill(control_pid, signo) < 0) |
3841 | r = -errno; | |
ac5e3a50 JS |
3842 | else |
3843 | killed = true; | |
3844 | } | |
814cc562 | 3845 | |
ac5e3a50 JS |
3846 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3847 | if (main_pid > 0) { | |
814cc562 MS |
3848 | if (kill(main_pid, signo) < 0) |
3849 | r = -errno; | |
ac5e3a50 JS |
3850 | else |
3851 | killed = true; | |
3852 | } | |
814cc562 | 3853 | |
ac5e3a50 | 3854 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3855 | _cleanup_set_free_ Set *pid_set = NULL; |
3856 | int q; | |
3857 | ||
82659fd7 LP |
3858 | /* Exclude the main/control pids from being killed via the cgroup */ |
3859 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3860 | if (!pid_set) |
3861 | return -ENOMEM; | |
3862 | ||
1d98fef1 | 3863 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, NULL, NULL); |
4c701096 | 3864 | if (q < 0 && !IN_SET(q, -EAGAIN, -ESRCH, -ENOENT)) |
814cc562 | 3865 | r = q; |
ac5e3a50 JS |
3866 | else |
3867 | killed = true; | |
814cc562 MS |
3868 | } |
3869 | ||
201f0c91 | 3870 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL)) |
ac5e3a50 JS |
3871 | return -ESRCH; |
3872 | ||
814cc562 MS |
3873 | return r; |
3874 | } | |
3875 | ||
6210e7fc LP |
3876 | int unit_following_set(Unit *u, Set **s) { |
3877 | assert(u); | |
3878 | assert(s); | |
3879 | ||
3880 | if (UNIT_VTABLE(u)->following_set) | |
3881 | return UNIT_VTABLE(u)->following_set(u, s); | |
3882 | ||
3883 | *s = NULL; | |
3884 | return 0; | |
3885 | } | |
3886 | ||
a4375746 | 3887 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
3888 | int r; |
3889 | ||
a4375746 LP |
3890 | assert(u); |
3891 | ||
0ec0deaa LP |
3892 | if (u->unit_file_state < 0 && u->fragment_path) { |
3893 | r = unit_file_get_state( | |
463d0d15 | 3894 | u->manager->unit_file_scope, |
0ec0deaa LP |
3895 | NULL, |
3896 | basename(u->fragment_path), | |
3897 | &u->unit_file_state); | |
3898 | if (r < 0) | |
3899 | u->unit_file_state = UNIT_FILE_BAD; | |
3900 | } | |
a4375746 | 3901 | |
ac155bb8 | 3902 | return u->unit_file_state; |
a4375746 LP |
3903 | } |
3904 | ||
d2dc52db LP |
3905 | int unit_get_unit_file_preset(Unit *u) { |
3906 | assert(u); | |
3907 | ||
3908 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3909 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 3910 | u->manager->unit_file_scope, |
0ec0deaa LP |
3911 | NULL, |
3912 | basename(u->fragment_path)); | |
d2dc52db LP |
3913 | |
3914 | return u->unit_file_preset; | |
3915 | } | |
3916 | ||
57020a3a LP |
3917 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
3918 | assert(ref); | |
3919 | assert(u); | |
3920 | ||
3921 | if (ref->unit) | |
3922 | unit_ref_unset(ref); | |
3923 | ||
3924 | ref->unit = u; | |
71fda00f | 3925 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
3926 | return u; |
3927 | } | |
3928 | ||
3929 | void unit_ref_unset(UnitRef *ref) { | |
3930 | assert(ref); | |
3931 | ||
3932 | if (!ref->unit) | |
3933 | return; | |
3934 | ||
b75102e5 LP |
3935 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
3936 | * be unreferenced now. */ | |
3937 | unit_add_to_gc_queue(ref->unit); | |
3938 | ||
71fda00f | 3939 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
3940 | ref->unit = NULL; |
3941 | } | |
3942 | ||
29206d46 LP |
3943 | static int user_from_unit_name(Unit *u, char **ret) { |
3944 | ||
3945 | static const uint8_t hash_key[] = { | |
3946 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
3947 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
3948 | }; | |
3949 | ||
3950 | _cleanup_free_ char *n = NULL; | |
3951 | int r; | |
3952 | ||
3953 | r = unit_name_to_prefix(u->id, &n); | |
3954 | if (r < 0) | |
3955 | return r; | |
3956 | ||
3957 | if (valid_user_group_name(n)) { | |
3958 | *ret = n; | |
3959 | n = NULL; | |
3960 | return 0; | |
3961 | } | |
3962 | ||
3963 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
3964 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
3965 | return -ENOMEM; | |
3966 | ||
3967 | return 0; | |
3968 | } | |
3969 | ||
598459ce LP |
3970 | int unit_patch_contexts(Unit *u) { |
3971 | CGroupContext *cc; | |
3972 | ExecContext *ec; | |
cba6e062 LP |
3973 | unsigned i; |
3974 | int r; | |
3975 | ||
e06c73cc | 3976 | assert(u); |
e06c73cc | 3977 | |
598459ce LP |
3978 | /* Patch in the manager defaults into the exec and cgroup |
3979 | * contexts, _after_ the rest of the settings have been | |
3980 | * initialized */ | |
085afe36 | 3981 | |
598459ce LP |
3982 | ec = unit_get_exec_context(u); |
3983 | if (ec) { | |
3984 | /* This only copies in the ones that need memory */ | |
3985 | for (i = 0; i < _RLIMIT_MAX; i++) | |
3986 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
3987 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
3988 | if (!ec->rlimit[i]) | |
3989 | return -ENOMEM; | |
3990 | } | |
3991 | ||
463d0d15 | 3992 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
3993 | !ec->working_directory) { |
3994 | ||
3995 | r = get_home_dir(&ec->working_directory); | |
3996 | if (r < 0) | |
3997 | return r; | |
4c08c824 LP |
3998 | |
3999 | /* Allow user services to run, even if the | |
4000 | * home directory is missing */ | |
4001 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4002 | } |
4003 | ||
598459ce | 4004 | if (ec->private_devices) |
2cd0a735 | 4005 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4006 | |
4007 | if (ec->protect_kernel_modules) | |
4008 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 LP |
4009 | |
4010 | if (ec->dynamic_user) { | |
4011 | if (!ec->user) { | |
4012 | r = user_from_unit_name(u, &ec->user); | |
4013 | if (r < 0) | |
4014 | return r; | |
4015 | } | |
4016 | ||
4017 | if (!ec->group) { | |
4018 | ec->group = strdup(ec->user); | |
4019 | if (!ec->group) | |
4020 | return -ENOMEM; | |
4021 | } | |
4022 | ||
63bb64a0 LP |
4023 | /* If the dynamic user option is on, let's make sure that the unit can't leave its UID/GID |
4024 | * around in the file system or on IPC objects. Hence enforce a strict sandbox. */ | |
4025 | ||
29206d46 | 4026 | ec->private_tmp = true; |
00d9ef85 | 4027 | ec->remove_ipc = true; |
63bb64a0 LP |
4028 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4029 | if (ec->protect_home == PROTECT_HOME_NO) | |
4030 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
29206d46 | 4031 | } |
cba6e062 LP |
4032 | } |
4033 | ||
598459ce LP |
4034 | cc = unit_get_cgroup_context(u); |
4035 | if (cc) { | |
f513e420 | 4036 | |
598459ce LP |
4037 | if (ec && |
4038 | ec->private_devices && | |
4039 | cc->device_policy == CGROUP_AUTO) | |
4040 | cc->device_policy = CGROUP_CLOSED; | |
4041 | } | |
f1660f96 | 4042 | |
cba6e062 | 4043 | return 0; |
e06c73cc LP |
4044 | } |
4045 | ||
3ef63c31 LP |
4046 | ExecContext *unit_get_exec_context(Unit *u) { |
4047 | size_t offset; | |
4048 | assert(u); | |
4049 | ||
598459ce LP |
4050 | if (u->type < 0) |
4051 | return NULL; | |
4052 | ||
3ef63c31 LP |
4053 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4054 | if (offset <= 0) | |
4055 | return NULL; | |
4056 | ||
4057 | return (ExecContext*) ((uint8_t*) u + offset); | |
4058 | } | |
4059 | ||
718db961 LP |
4060 | KillContext *unit_get_kill_context(Unit *u) { |
4061 | size_t offset; | |
4062 | assert(u); | |
4063 | ||
598459ce LP |
4064 | if (u->type < 0) |
4065 | return NULL; | |
4066 | ||
718db961 LP |
4067 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4068 | if (offset <= 0) | |
4069 | return NULL; | |
4070 | ||
4071 | return (KillContext*) ((uint8_t*) u + offset); | |
4072 | } | |
4073 | ||
4ad49000 LP |
4074 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4075 | size_t offset; | |
4076 | ||
598459ce LP |
4077 | if (u->type < 0) |
4078 | return NULL; | |
4079 | ||
4ad49000 LP |
4080 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4081 | if (offset <= 0) | |
4082 | return NULL; | |
4083 | ||
4084 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4085 | } | |
4086 | ||
613b411c LP |
4087 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4088 | size_t offset; | |
4089 | ||
598459ce LP |
4090 | if (u->type < 0) |
4091 | return NULL; | |
4092 | ||
613b411c LP |
4093 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4094 | if (offset <= 0) | |
4095 | return NULL; | |
4096 | ||
4097 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4098 | } | |
4099 | ||
39591351 | 4100 | static const char* unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode) { |
3f5e8115 LP |
4101 | assert(u); |
4102 | ||
4f4afc88 LP |
4103 | if (!IN_SET(mode, UNIT_RUNTIME, UNIT_PERSISTENT)) |
4104 | return NULL; | |
4105 | ||
39591351 LP |
4106 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4107 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4108 | |
39591351 | 4109 | if (mode == UNIT_RUNTIME) |
4f4afc88 | 4110 | return u->manager->lookup_paths.runtime_control; |
3f5e8115 | 4111 | |
39591351 | 4112 | if (mode == UNIT_PERSISTENT) |
4f4afc88 | 4113 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4114 | |
39591351 | 4115 | return NULL; |
71645aca LP |
4116 | } |
4117 | ||
8e2af478 | 4118 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
39591351 | 4119 | _cleanup_free_ char *p = NULL, *q = NULL; |
2a9a6f8a | 4120 | const char *dir, *wrapped; |
26d04f86 | 4121 | int r; |
71645aca LP |
4122 | |
4123 | assert(u); | |
4124 | ||
4f4afc88 LP |
4125 | if (u->transient_file) { |
4126 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4127 | * write to the transient unit file. */ | |
4128 | fputs(data, u->transient_file); | |
fc40065b | 4129 | fputc('\n', u->transient_file); |
4f4afc88 LP |
4130 | return 0; |
4131 | } | |
4132 | ||
6d235724 | 4133 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
4134 | return 0; |
4135 | ||
39591351 LP |
4136 | dir = unit_drop_in_dir(u, mode); |
4137 | if (!dir) | |
4138 | return -EINVAL; | |
71645aca | 4139 | |
2a9a6f8a | 4140 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4141 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4142 | data, |
4143 | "\n"); | |
e20b2a86 | 4144 | |
815b09d3 | 4145 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4146 | if (r < 0) |
4147 | return r; | |
4148 | ||
815b09d3 | 4149 | (void) mkdir_p(p, 0755); |
2a9a6f8a | 4150 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4151 | if (r < 0) |
4152 | return r; | |
4153 | ||
815b09d3 | 4154 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4155 | if (r < 0) |
4156 | return r; | |
815b09d3 | 4157 | q = NULL; |
adb76a70 | 4158 | |
adb76a70 WC |
4159 | strv_uniq(u->dropin_paths); |
4160 | ||
4161 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4162 | ||
4163 | return 0; | |
26d04f86 | 4164 | } |
71645aca | 4165 | |
b9ec9359 LP |
4166 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
4167 | _cleanup_free_ char *p = NULL; | |
4168 | va_list ap; | |
4169 | int r; | |
4170 | ||
4171 | assert(u); | |
4172 | assert(name); | |
4173 | assert(format); | |
4174 | ||
6d235724 | 4175 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
4176 | return 0; |
4177 | ||
4178 | va_start(ap, format); | |
4179 | r = vasprintf(&p, format, ap); | |
4180 | va_end(ap); | |
4181 | ||
4182 | if (r < 0) | |
4183 | return -ENOMEM; | |
4184 | ||
4185 | return unit_write_drop_in(u, mode, name, p); | |
4186 | } | |
4187 | ||
4188 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
39591351 | 4189 | const char *ndata; |
b42defe3 LP |
4190 | |
4191 | assert(u); | |
4192 | assert(name); | |
4193 | assert(data); | |
4194 | ||
4195 | if (!UNIT_VTABLE(u)->private_section) | |
4196 | return -EINVAL; | |
4197 | ||
6d235724 | 4198 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
4199 | return 0; |
4200 | ||
81d62103 | 4201 | ndata = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); |
b42defe3 LP |
4202 | |
4203 | return unit_write_drop_in(u, mode, name, ndata); | |
4204 | } | |
4205 | ||
b9ec9359 LP |
4206 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
4207 | _cleanup_free_ char *p = NULL; | |
4208 | va_list ap; | |
4209 | int r; | |
4210 | ||
4211 | assert(u); | |
4212 | assert(name); | |
4213 | assert(format); | |
4214 | ||
6d235724 | 4215 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
4216 | return 0; |
4217 | ||
4218 | va_start(ap, format); | |
4219 | r = vasprintf(&p, format, ap); | |
4220 | va_end(ap); | |
4221 | ||
4222 | if (r < 0) | |
4223 | return -ENOMEM; | |
4224 | ||
4225 | return unit_write_drop_in_private(u, mode, name, p); | |
4226 | } | |
71645aca | 4227 | |
c2756a68 | 4228 | int unit_make_transient(Unit *u) { |
4f4afc88 LP |
4229 | FILE *f; |
4230 | char *path; | |
4231 | ||
c2756a68 LP |
4232 | assert(u); |
4233 | ||
3f5e8115 LP |
4234 | if (!UNIT_VTABLE(u)->can_transient) |
4235 | return -EOPNOTSUPP; | |
4236 | ||
605405c6 | 4237 | path = strjoin(u->manager->lookup_paths.transient, "/", u->id); |
4f4afc88 LP |
4238 | if (!path) |
4239 | return -ENOMEM; | |
4240 | ||
4241 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4242 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4243 | ||
78e334b5 | 4244 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 4245 | f = fopen(path, "we"); |
78e334b5 ZJS |
4246 | if (!f) { |
4247 | free(path); | |
4248 | return -errno; | |
4249 | } | |
4f4afc88 LP |
4250 | } |
4251 | ||
4252 | if (u->transient_file) | |
4253 | fclose(u->transient_file); | |
4254 | u->transient_file = f; | |
4255 | ||
4256 | free(u->fragment_path); | |
4257 | u->fragment_path = path; | |
7c65093a | 4258 | |
7c65093a LP |
4259 | u->source_path = mfree(u->source_path); |
4260 | u->dropin_paths = strv_free(u->dropin_paths); | |
4261 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4262 | ||
4f4afc88 LP |
4263 | u->load_state = UNIT_STUB; |
4264 | u->load_error = 0; | |
4265 | u->transient = true; | |
4266 | ||
7c65093a LP |
4267 | unit_add_to_dbus_queue(u); |
4268 | unit_add_to_gc_queue(u); | |
c2756a68 | 4269 | |
4f4afc88 LP |
4270 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4271 | u->transient_file); | |
4272 | ||
3f5e8115 | 4273 | return 0; |
c2756a68 LP |
4274 | } |
4275 | ||
1d98fef1 LP |
4276 | static void log_kill(pid_t pid, int sig, void *userdata) { |
4277 | _cleanup_free_ char *comm = NULL; | |
4278 | ||
4279 | (void) get_process_comm(pid, &comm); | |
4280 | ||
4281 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4282 | only, like for example systemd's own PAM stub process. */ | |
4283 | if (comm && comm[0] == '(') | |
4284 | return; | |
4285 | ||
4286 | log_unit_notice(userdata, | |
4287 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4288 | pid, | |
4289 | strna(comm), | |
4290 | signal_to_string(sig)); | |
4291 | } | |
4292 | ||
4293 | static int operation_to_signal(KillContext *c, KillOperation k) { | |
4294 | assert(c); | |
4295 | ||
4296 | switch (k) { | |
4297 | ||
4298 | case KILL_TERMINATE: | |
4299 | case KILL_TERMINATE_AND_LOG: | |
4300 | return c->kill_signal; | |
4301 | ||
4302 | case KILL_KILL: | |
4303 | return SIGKILL; | |
4304 | ||
4305 | case KILL_ABORT: | |
4306 | return SIGABRT; | |
4307 | ||
4308 | default: | |
4309 | assert_not_reached("KillOperation unknown"); | |
4310 | } | |
4311 | } | |
4312 | ||
cd2086fe LP |
4313 | int unit_kill_context( |
4314 | Unit *u, | |
4315 | KillContext *c, | |
db2cb23b | 4316 | KillOperation k, |
cd2086fe LP |
4317 | pid_t main_pid, |
4318 | pid_t control_pid, | |
4319 | bool main_pid_alien) { | |
4320 | ||
1d98fef1 | 4321 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4322 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4323 | int sig, r; |
cd2086fe LP |
4324 | |
4325 | assert(u); | |
4326 | assert(c); | |
4327 | ||
59ec09a8 ZJS |
4328 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. |
4329 | * Returns > 0 if we killed something worth waiting for, 0 otherwise. */ | |
1d98fef1 | 4330 | |
cd2086fe LP |
4331 | if (c->kill_mode == KILL_NONE) |
4332 | return 0; | |
4333 | ||
1d98fef1 LP |
4334 | sig = operation_to_signal(c, k); |
4335 | ||
4336 | send_sighup = | |
4337 | c->send_sighup && | |
4338 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4339 | sig != SIGHUP; | |
4340 | ||
59ec09a8 ZJS |
4341 | if (k != KILL_TERMINATE || IN_SET(sig, SIGKILL, SIGABRT)) |
4342 | log_func = log_kill; | |
cd2086fe LP |
4343 | |
4344 | if (main_pid > 0) { | |
1d98fef1 LP |
4345 | if (log_func) |
4346 | log_func(main_pid, sig, u); | |
cd2086fe | 4347 | |
1d98fef1 | 4348 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4349 | if (r < 0 && r != -ESRCH) { |
4350 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4351 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 4352 | |
b821a397 | 4353 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 4354 | } else { |
bc6aed7b LP |
4355 | if (!main_pid_alien) |
4356 | wait_for_exit = true; | |
82659fd7 | 4357 | |
1d98fef1 | 4358 | if (r != -ESRCH && send_sighup) |
d0667321 | 4359 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 4360 | } |
cd2086fe LP |
4361 | } |
4362 | ||
4363 | if (control_pid > 0) { | |
1d98fef1 LP |
4364 | if (log_func) |
4365 | log_func(control_pid, sig, u); | |
cd2086fe | 4366 | |
1d98fef1 | 4367 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4368 | if (r < 0 && r != -ESRCH) { |
4369 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4370 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 4371 | |
b821a397 | 4372 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 4373 | } else { |
cd2086fe | 4374 | wait_for_exit = true; |
82659fd7 | 4375 | |
1d98fef1 | 4376 | if (r != -ESRCH && send_sighup) |
d0667321 | 4377 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 4378 | } |
cd2086fe LP |
4379 | } |
4380 | ||
b821a397 LP |
4381 | if (u->cgroup_path && |
4382 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4383 | _cleanup_set_free_ Set *pid_set = NULL; |
4384 | ||
82659fd7 LP |
4385 | /* Exclude the main/control pids from being killed via the cgroup */ |
4386 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4387 | if (!pid_set) |
4388 | return -ENOMEM; | |
4389 | ||
1d98fef1 LP |
4390 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4391 | sig, | |
4392 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4393 | pid_set, | |
4394 | log_func, u); | |
cd2086fe | 4395 | if (r < 0) { |
4c701096 | 4396 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
b821a397 LP |
4397 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
4398 | ||
82659fd7 | 4399 | } else if (r > 0) { |
bc6aed7b | 4400 | |
efdb0237 LP |
4401 | /* FIXME: For now, on the legacy hierarchy, we |
4402 | * will not wait for the cgroup members to die | |
4403 | * if we are running in a container or if this | |
4404 | * is a delegation unit, simply because cgroup | |
4405 | * notification is unreliable in these | |
4406 | * cases. It doesn't work at all in | |
4407 | * containers, and outside of containers it | |
4408 | * can be confused easily by left-over | |
ccddd104 | 4409 | * directories in the cgroup — which however |
efdb0237 LP |
4410 | * should not exist in non-delegated units. On |
4411 | * the unified hierarchy that's different, | |
4412 | * there we get proper events. Hence rely on | |
13e785f7 | 4413 | * them. */ |
efdb0237 | 4414 | |
c22800e4 | 4415 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
2e4025c0 | 4416 | (detect_container() == 0 && !UNIT_CGROUP_BOOL(u, delegate))) |
e9db43d5 | 4417 | wait_for_exit = true; |
58ea275a | 4418 | |
1d98fef1 | 4419 | if (send_sighup) { |
82659fd7 LP |
4420 | set_free(pid_set); |
4421 | ||
4422 | pid_set = unit_pid_set(main_pid, control_pid); | |
4423 | if (!pid_set) | |
4424 | return -ENOMEM; | |
4425 | ||
1d98fef1 LP |
4426 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4427 | SIGHUP, | |
4428 | CGROUP_IGNORE_SELF, | |
4429 | pid_set, | |
4430 | NULL, NULL); | |
82659fd7 LP |
4431 | } |
4432 | } | |
cd2086fe LP |
4433 | } |
4434 | ||
4435 | return wait_for_exit; | |
4436 | } | |
4437 | ||
eef85c4a | 4438 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
a57f7e2c | 4439 | char prefix[strlen(path) + 1], *p; |
eef85c4a | 4440 | UnitDependencyInfo di; |
a57f7e2c LP |
4441 | int r; |
4442 | ||
4443 | assert(u); | |
4444 | assert(path); | |
4445 | ||
eef85c4a LP |
4446 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in |
4447 | * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to | |
4448 | * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily | |
4449 | * determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4450 | |
70b64bd3 ZJS |
4451 | if (!path_is_absolute(path)) |
4452 | return -EINVAL; | |
4453 | ||
eef85c4a LP |
4454 | r = hashmap_ensure_allocated(&u->requires_mounts_for, &string_hash_ops); |
4455 | if (r < 0) | |
4456 | return r; | |
4457 | ||
a57f7e2c LP |
4458 | p = strdup(path); |
4459 | if (!p) | |
4460 | return -ENOMEM; | |
4461 | ||
4462 | path_kill_slashes(p); | |
4463 | ||
a57f7e2c LP |
4464 | if (!path_is_safe(p)) { |
4465 | free(p); | |
4466 | return -EPERM; | |
4467 | } | |
4468 | ||
eef85c4a | 4469 | if (hashmap_contains(u->requires_mounts_for, p)) { |
a57f7e2c LP |
4470 | free(p); |
4471 | return 0; | |
4472 | } | |
4473 | ||
eef85c4a LP |
4474 | di = (UnitDependencyInfo) { |
4475 | .origin_mask = mask | |
4476 | }; | |
4477 | ||
4478 | r = hashmap_put(u->requires_mounts_for, p, di.data); | |
4479 | if (r < 0) { | |
4480 | free(p); | |
a57f7e2c | 4481 | return r; |
eef85c4a | 4482 | } |
a57f7e2c LP |
4483 | |
4484 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
4485 | Set *x; | |
4486 | ||
4487 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4488 | if (!x) { | |
4489 | char *q; | |
4490 | ||
742f41ad LP |
4491 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &string_hash_ops); |
4492 | if (r < 0) | |
4493 | return r; | |
a57f7e2c LP |
4494 | |
4495 | q = strdup(prefix); | |
4496 | if (!q) | |
4497 | return -ENOMEM; | |
4498 | ||
d5099efc | 4499 | x = set_new(NULL); |
a57f7e2c LP |
4500 | if (!x) { |
4501 | free(q); | |
4502 | return -ENOMEM; | |
4503 | } | |
4504 | ||
4505 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4506 | if (r < 0) { | |
4507 | free(q); | |
4508 | set_free(x); | |
4509 | return r; | |
4510 | } | |
4511 | } | |
4512 | ||
4513 | r = set_put(x, u); | |
4514 | if (r < 0) | |
4515 | return r; | |
4516 | } | |
4517 | ||
4518 | return 0; | |
4519 | } | |
4520 | ||
613b411c LP |
4521 | int unit_setup_exec_runtime(Unit *u) { |
4522 | ExecRuntime **rt; | |
4523 | size_t offset; | |
613b411c | 4524 | Unit *other; |
eef85c4a LP |
4525 | Iterator i; |
4526 | void *v; | |
613b411c LP |
4527 | |
4528 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4529 | assert(offset > 0); | |
4530 | ||
06b643e7 | 4531 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
4532 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
4533 | if (*rt) | |
4534 | return 0; | |
4535 | ||
4536 | /* Try to get it from somebody else */ | |
eef85c4a | 4537 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { |
613b411c LP |
4538 | |
4539 | *rt = unit_get_exec_runtime(other); | |
4540 | if (*rt) { | |
4541 | exec_runtime_ref(*rt); | |
4542 | return 0; | |
4543 | } | |
4544 | } | |
4545 | ||
4546 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
4547 | } | |
4548 | ||
29206d46 LP |
4549 | int unit_setup_dynamic_creds(Unit *u) { |
4550 | ExecContext *ec; | |
4551 | DynamicCreds *dcreds; | |
4552 | size_t offset; | |
4553 | ||
4554 | assert(u); | |
4555 | ||
4556 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
4557 | assert(offset > 0); | |
4558 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
4559 | ||
4560 | ec = unit_get_exec_context(u); | |
4561 | assert(ec); | |
4562 | ||
4563 | if (!ec->dynamic_user) | |
4564 | return 0; | |
4565 | ||
4566 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
4567 | } | |
4568 | ||
1c2e9646 LP |
4569 | bool unit_type_supported(UnitType t) { |
4570 | if (_unlikely_(t < 0)) | |
4571 | return false; | |
4572 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
4573 | return false; | |
4574 | ||
4575 | if (!unit_vtable[t]->supported) | |
4576 | return true; | |
4577 | ||
4578 | return unit_vtable[t]->supported(); | |
4579 | } | |
4580 | ||
8b4305c7 LP |
4581 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
4582 | int r; | |
4583 | ||
4584 | assert(u); | |
4585 | assert(where); | |
4586 | ||
4587 | r = dir_is_empty(where); | |
4588 | if (r > 0) | |
4589 | return; | |
4590 | if (r < 0) { | |
4591 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
4592 | return; | |
4593 | } | |
4594 | ||
4595 | log_struct(LOG_NOTICE, | |
2b044526 | 4596 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4597 | LOG_UNIT_ID(u), |
f1c50bec | 4598 | LOG_UNIT_INVOCATION_ID(u), |
8b4305c7 LP |
4599 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), |
4600 | "WHERE=%s", where, | |
4601 | NULL); | |
4602 | } | |
4603 | ||
4604 | int unit_fail_if_symlink(Unit *u, const char* where) { | |
4605 | int r; | |
4606 | ||
4607 | assert(u); | |
4608 | assert(where); | |
4609 | ||
4610 | r = is_symlink(where); | |
4611 | if (r < 0) { | |
4612 | log_unit_debug_errno(u, r, "Failed to check symlink %s, ignoring: %m", where); | |
4613 | return 0; | |
4614 | } | |
4615 | if (r == 0) | |
4616 | return 0; | |
4617 | ||
4618 | log_struct(LOG_ERR, | |
2b044526 | 4619 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4620 | LOG_UNIT_ID(u), |
f1c50bec | 4621 | LOG_UNIT_INVOCATION_ID(u), |
8b4305c7 LP |
4622 | LOG_UNIT_MESSAGE(u, "Mount on symlink %s not allowed.", where), |
4623 | "WHERE=%s", where, | |
4624 | NULL); | |
4625 | ||
4626 | return -ELOOP; | |
4627 | } | |
0f13f3bd LP |
4628 | |
4629 | bool unit_is_pristine(Unit *u) { | |
4630 | assert(u); | |
4631 | ||
7c65093a | 4632 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
4633 | * in a number of different ways. Note that to cater for unit |
4634 | * types such as slice, we are generally fine with units that | |
61233823 | 4635 | * are marked UNIT_LOADED even though nothing was |
0f13f3bd LP |
4636 | * actually loaded, as those unit types don't require a file |
4637 | * on disk to validly load. */ | |
4638 | ||
4639 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
4640 | u->fragment_path || | |
4641 | u->source_path || | |
4642 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
4643 | u->job || |
4644 | u->merged_into); | |
4645 | } | |
291d565a LP |
4646 | |
4647 | pid_t unit_control_pid(Unit *u) { | |
4648 | assert(u); | |
4649 | ||
4650 | if (UNIT_VTABLE(u)->control_pid) | |
4651 | return UNIT_VTABLE(u)->control_pid(u); | |
4652 | ||
4653 | return 0; | |
4654 | } | |
4655 | ||
4656 | pid_t unit_main_pid(Unit *u) { | |
4657 | assert(u); | |
4658 | ||
4659 | if (UNIT_VTABLE(u)->main_pid) | |
4660 | return UNIT_VTABLE(u)->main_pid(u); | |
4661 | ||
4662 | return 0; | |
4663 | } | |
00d9ef85 LP |
4664 | |
4665 | static void unit_unref_uid_internal( | |
4666 | Unit *u, | |
4667 | uid_t *ref_uid, | |
4668 | bool destroy_now, | |
4669 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
4670 | ||
4671 | assert(u); | |
4672 | assert(ref_uid); | |
4673 | assert(_manager_unref_uid); | |
4674 | ||
4675 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
4676 | * gid_t are actually the same time, with the same validity rules. | |
4677 | * | |
4678 | * Drops a reference to UID/GID from a unit. */ | |
4679 | ||
4680 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4681 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4682 | ||
4683 | if (!uid_is_valid(*ref_uid)) | |
4684 | return; | |
4685 | ||
4686 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
4687 | *ref_uid = UID_INVALID; | |
4688 | } | |
4689 | ||
4690 | void unit_unref_uid(Unit *u, bool destroy_now) { | |
4691 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); | |
4692 | } | |
4693 | ||
4694 | void unit_unref_gid(Unit *u, bool destroy_now) { | |
4695 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); | |
4696 | } | |
4697 | ||
4698 | static int unit_ref_uid_internal( | |
4699 | Unit *u, | |
4700 | uid_t *ref_uid, | |
4701 | uid_t uid, | |
4702 | bool clean_ipc, | |
4703 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
4704 | ||
4705 | int r; | |
4706 | ||
4707 | assert(u); | |
4708 | assert(ref_uid); | |
4709 | assert(uid_is_valid(uid)); | |
4710 | assert(_manager_ref_uid); | |
4711 | ||
4712 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
4713 | * are actually the same type, and have the same validity rules. | |
4714 | * | |
4715 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
4716 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
4717 | * drops to zero. */ | |
4718 | ||
4719 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4720 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4721 | ||
4722 | if (*ref_uid == uid) | |
4723 | return 0; | |
4724 | ||
4725 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
4726 | return -EBUSY; | |
4727 | ||
4728 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
4729 | if (r < 0) | |
4730 | return r; | |
4731 | ||
4732 | *ref_uid = uid; | |
4733 | return 1; | |
4734 | } | |
4735 | ||
4736 | int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { | |
4737 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); | |
4738 | } | |
4739 | ||
4740 | int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { | |
4741 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); | |
4742 | } | |
4743 | ||
4744 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
4745 | int r = 0, q = 0; | |
4746 | ||
4747 | assert(u); | |
4748 | ||
4749 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
4750 | ||
4751 | if (uid_is_valid(uid)) { | |
4752 | r = unit_ref_uid(u, uid, clean_ipc); | |
4753 | if (r < 0) | |
4754 | return r; | |
4755 | } | |
4756 | ||
4757 | if (gid_is_valid(gid)) { | |
4758 | q = unit_ref_gid(u, gid, clean_ipc); | |
4759 | if (q < 0) { | |
4760 | if (r > 0) | |
4761 | unit_unref_uid(u, false); | |
4762 | ||
4763 | return q; | |
4764 | } | |
4765 | } | |
4766 | ||
4767 | return r > 0 || q > 0; | |
4768 | } | |
4769 | ||
4770 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
4771 | ExecContext *c; | |
4772 | int r; | |
4773 | ||
4774 | assert(u); | |
4775 | ||
4776 | c = unit_get_exec_context(u); | |
4777 | ||
4778 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
4779 | if (r < 0) | |
4780 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
4781 | ||
4782 | return r; | |
4783 | } | |
4784 | ||
4785 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { | |
4786 | assert(u); | |
4787 | ||
4788 | unit_unref_uid(u, destroy_now); | |
4789 | unit_unref_gid(u, destroy_now); | |
4790 | } | |
4791 | ||
4792 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { | |
4793 | int r; | |
4794 | ||
4795 | assert(u); | |
4796 | ||
4797 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
4798 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
4799 | * objects when no service references the UID/GID anymore. */ | |
4800 | ||
4801 | r = unit_ref_uid_gid(u, uid, gid); | |
4802 | if (r > 0) | |
4803 | bus_unit_send_change_signal(u); | |
4804 | } | |
4b58153d LP |
4805 | |
4806 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { | |
4807 | int r; | |
4808 | ||
4809 | assert(u); | |
4810 | ||
4811 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
4812 | ||
4813 | if (sd_id128_equal(u->invocation_id, id)) | |
4814 | return 0; | |
4815 | ||
4816 | if (!sd_id128_is_null(u->invocation_id)) | |
4817 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
4818 | ||
4819 | if (sd_id128_is_null(id)) { | |
4820 | r = 0; | |
4821 | goto reset; | |
4822 | } | |
4823 | ||
4824 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
4825 | if (r < 0) | |
4826 | goto reset; | |
4827 | ||
4828 | u->invocation_id = id; | |
4829 | sd_id128_to_string(id, u->invocation_id_string); | |
4830 | ||
4831 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
4832 | if (r < 0) | |
4833 | goto reset; | |
4834 | ||
4835 | return 0; | |
4836 | ||
4837 | reset: | |
4838 | u->invocation_id = SD_ID128_NULL; | |
4839 | u->invocation_id_string[0] = 0; | |
4840 | return r; | |
4841 | } | |
4842 | ||
4843 | int unit_acquire_invocation_id(Unit *u) { | |
4844 | sd_id128_t id; | |
4845 | int r; | |
4846 | ||
4847 | assert(u); | |
4848 | ||
4849 | r = sd_id128_randomize(&id); | |
4850 | if (r < 0) | |
4851 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
4852 | ||
4853 | r = unit_set_invocation_id(u, id); | |
4854 | if (r < 0) | |
4855 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
4856 | ||
4857 | return 0; | |
4858 | } | |
f0d47797 | 4859 | |
7960b0c7 LP |
4860 | void unit_set_exec_params(Unit *u, ExecParameters *p) { |
4861 | assert(u); | |
4862 | assert(p); | |
f0d47797 | 4863 | |
7960b0c7 | 4864 | p->cgroup_path = u->cgroup_path; |
2e4025c0 | 4865 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, UNIT_CGROUP_BOOL(u, delegate)); |
f0d47797 | 4866 | } |
a79279c7 LP |
4867 | |
4868 | int unit_fork_helper_process(Unit *u, pid_t *ret) { | |
4869 | pid_t pid; | |
4870 | int r; | |
4871 | ||
4872 | assert(u); | |
4873 | assert(ret); | |
4874 | ||
4875 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
4876 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
4877 | ||
4878 | (void) unit_realize_cgroup(u); | |
4879 | ||
4880 | pid = fork(); | |
4881 | if (pid < 0) | |
4882 | return -errno; | |
4883 | ||
4884 | if (pid == 0) { | |
4885 | ||
4886 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); | |
4887 | (void) ignore_signals(SIGPIPE, -1); | |
4888 | ||
4889 | log_close(); | |
4890 | log_open(); | |
4891 | ||
4892 | if (u->cgroup_path) { | |
4893 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
4894 | if (r < 0) { | |
4895 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", u->cgroup_path); | |
4896 | _exit(EXIT_CGROUP); | |
4897 | } | |
4898 | } | |
4899 | ||
4900 | *ret = getpid_cached(); | |
4901 | return 0; | |
4902 | } | |
4903 | ||
4904 | *ret = pid; | |
4905 | return 1; | |
4906 | } | |
c999cf38 LP |
4907 | |
4908 | static void unit_update_dependency_mask(Unit *u, UnitDependency d, Unit *other, UnitDependencyInfo di) { | |
4909 | assert(u); | |
4910 | assert(d >= 0); | |
4911 | assert(d < _UNIT_DEPENDENCY_MAX); | |
4912 | assert(other); | |
4913 | ||
4914 | if (di.origin_mask == 0 && di.destination_mask == 0) { | |
4915 | /* No bit set anymore, let's drop the whole entry */ | |
4916 | assert_se(hashmap_remove(u->dependencies[d], other)); | |
4917 | log_unit_debug(u, "%s lost dependency %s=%s", u->id, unit_dependency_to_string(d), other->id); | |
4918 | } else | |
4919 | /* Mask was reduced, let's update the entry */ | |
4920 | assert_se(hashmap_update(u->dependencies[d], other, di.data) == 0); | |
4921 | } | |
4922 | ||
4923 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
4924 | UnitDependency d; | |
4925 | ||
4926 | assert(u); | |
4927 | ||
4928 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
4929 | ||
4930 | if (mask == 0) | |
4931 | return; | |
4932 | ||
4933 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
4934 | bool done; | |
4935 | ||
4936 | do { | |
4937 | UnitDependencyInfo di; | |
4938 | Unit *other; | |
4939 | Iterator i; | |
4940 | ||
4941 | done = true; | |
4942 | ||
4943 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { | |
4944 | UnitDependency q; | |
4945 | ||
4946 | if ((di.origin_mask & ~mask) == di.origin_mask) | |
4947 | continue; | |
4948 | di.origin_mask &= ~mask; | |
4949 | unit_update_dependency_mask(u, d, other, di); | |
4950 | ||
4951 | /* We updated the dependency from our unit to the other unit now. But most dependencies | |
4952 | * imply a reverse dependency. Hence, let's delete that one too. For that we go through | |
4953 | * all dependency types on the other unit and delete all those which point to us and | |
4954 | * have the right mask set. */ | |
4955 | ||
4956 | for (q = 0; q < _UNIT_DEPENDENCY_MAX; q++) { | |
4957 | UnitDependencyInfo dj; | |
4958 | ||
4959 | dj.data = hashmap_get(other->dependencies[q], u); | |
4960 | if ((dj.destination_mask & ~mask) == dj.destination_mask) | |
4961 | continue; | |
4962 | dj.destination_mask &= ~mask; | |
4963 | ||
4964 | unit_update_dependency_mask(other, q, u, dj); | |
4965 | } | |
4966 | ||
4967 | unit_add_to_gc_queue(other); | |
4968 | ||
4969 | done = false; | |
4970 | break; | |
4971 | } | |
4972 | ||
4973 | } while (!done); | |
4974 | } | |
4975 | } | |
d3070fbd LP |
4976 | |
4977 | static int unit_export_invocation_id(Unit *u) { | |
4978 | const char *p; | |
4979 | int r; | |
4980 | ||
4981 | assert(u); | |
4982 | ||
4983 | if (u->exported_invocation_id) | |
4984 | return 0; | |
4985 | ||
4986 | if (sd_id128_is_null(u->invocation_id)) | |
4987 | return 0; | |
4988 | ||
4989 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
4990 | r = symlink_atomic(u->invocation_id_string, p); | |
4991 | if (r < 0) | |
4992 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
4993 | ||
4994 | u->exported_invocation_id = true; | |
4995 | return 0; | |
4996 | } | |
4997 | ||
4998 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
4999 | const char *p; | |
5000 | char buf[2]; | |
5001 | int r; | |
5002 | ||
5003 | assert(u); | |
5004 | assert(c); | |
5005 | ||
5006 | if (u->exported_log_level_max) | |
5007 | return 0; | |
5008 | ||
5009 | if (c->log_level_max < 0) | |
5010 | return 0; | |
5011 | ||
5012 | assert(c->log_level_max <= 7); | |
5013 | ||
5014 | buf[0] = '0' + c->log_level_max; | |
5015 | buf[1] = 0; | |
5016 | ||
5017 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5018 | r = symlink_atomic(buf, p); | |
5019 | if (r < 0) | |
5020 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5021 | ||
5022 | u->exported_log_level_max = true; | |
5023 | return 0; | |
5024 | } | |
5025 | ||
5026 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5027 | _cleanup_close_ int fd = -1; | |
5028 | struct iovec *iovec; | |
5029 | const char *p; | |
5030 | char *pattern; | |
5031 | le64_t *sizes; | |
5032 | ssize_t n; | |
5033 | size_t i; | |
5034 | int r; | |
5035 | ||
5036 | if (u->exported_log_extra_fields) | |
5037 | return 0; | |
5038 | ||
5039 | if (c->n_log_extra_fields <= 0) | |
5040 | return 0; | |
5041 | ||
5042 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5043 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5044 | ||
5045 | for (i = 0; i < c->n_log_extra_fields; i++) { | |
5046 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); | |
5047 | ||
5048 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5049 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5050 | } | |
5051 | ||
5052 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5053 | pattern = strjoina(p, ".XXXXXX"); | |
5054 | ||
5055 | fd = mkostemp_safe(pattern); | |
5056 | if (fd < 0) | |
5057 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5058 | ||
5059 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5060 | if (n < 0) { | |
5061 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5062 | goto fail; | |
5063 | } | |
5064 | ||
5065 | (void) fchmod(fd, 0644); | |
5066 | ||
5067 | if (rename(pattern, p) < 0) { | |
5068 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5069 | goto fail; | |
5070 | } | |
5071 | ||
5072 | u->exported_log_extra_fields = true; | |
5073 | return 0; | |
5074 | ||
5075 | fail: | |
5076 | (void) unlink(pattern); | |
5077 | return r; | |
5078 | } | |
5079 | ||
5080 | void unit_export_state_files(Unit *u) { | |
5081 | const ExecContext *c; | |
5082 | ||
5083 | assert(u); | |
5084 | ||
5085 | if (!u->id) | |
5086 | return; | |
5087 | ||
5088 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5089 | return; | |
5090 | ||
5091 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data | |
5092 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5093 | * the IPC system itself and PID 1 also log to the journal. | |
5094 | * | |
5095 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5096 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5097 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5098 | * namespace at least. | |
5099 | * | |
5100 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5101 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5102 | * them with one. */ | |
5103 | ||
5104 | (void) unit_export_invocation_id(u); | |
5105 | ||
5106 | c = unit_get_exec_context(u); | |
5107 | if (c) { | |
5108 | (void) unit_export_log_level_max(u, c); | |
5109 | (void) unit_export_log_extra_fields(u, c); | |
5110 | } | |
5111 | } | |
5112 | ||
5113 | void unit_unlink_state_files(Unit *u) { | |
5114 | const char *p; | |
5115 | ||
5116 | assert(u); | |
5117 | ||
5118 | if (!u->id) | |
5119 | return; | |
5120 | ||
5121 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5122 | return; | |
5123 | ||
5124 | /* Undoes the effect of unit_export_state() */ | |
5125 | ||
5126 | if (u->exported_invocation_id) { | |
5127 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
5128 | (void) unlink(p); | |
5129 | ||
5130 | u->exported_invocation_id = false; | |
5131 | } | |
5132 | ||
5133 | if (u->exported_log_level_max) { | |
5134 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5135 | (void) unlink(p); | |
5136 | ||
5137 | u->exported_log_level_max = false; | |
5138 | } | |
5139 | ||
5140 | if (u->exported_log_extra_fields) { | |
5141 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5142 | (void) unlink(p); | |
5143 | ||
5144 | u->exported_log_extra_fields = false; | |
5145 | } | |
5146 | } | |
5afe510c LP |
5147 | |
5148 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { | |
5149 | [COLLECT_INACTIVE] = "inactive", | |
5150 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
5151 | }; | |
5152 | ||
5153 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); |