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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> |
4c253ed1 | 24 | #include <sys/prctl.h> |
45fb0699 | 25 | #include <sys/stat.h> |
4f5dd394 | 26 | #include <unistd.h> |
87f0e418 | 27 | |
718db961 LP |
28 | #include "sd-id128.h" |
29 | #include "sd-messages.h" | |
4f5dd394 | 30 | |
b5efdb8a | 31 | #include "alloc-util.h" |
4f5dd394 LP |
32 | #include "bus-common-errors.h" |
33 | #include "bus-util.h" | |
c6c18be3 | 34 | #include "cgroup-util.h" |
4f5dd394 LP |
35 | #include "dbus-unit.h" |
36 | #include "dbus.h" | |
37 | #include "dropin.h" | |
38 | #include "escape.h" | |
39 | #include "execute.h" | |
6a48d82f | 40 | #include "fd-util.h" |
a5c32cff | 41 | #include "fileio-label.h" |
f97b34a6 | 42 | #include "format-util.h" |
d3070fbd | 43 | #include "fs-util.h" |
4b58153d | 44 | #include "id128-util.h" |
915b1d01 | 45 | #include "io-util.h" |
4f5dd394 LP |
46 | #include "load-dropin.h" |
47 | #include "load-fragment.h" | |
48 | #include "log.h" | |
49 | #include "macro.h" | |
50 | #include "missing.h" | |
51 | #include "mkdir.h" | |
6bedfcbb | 52 | #include "parse-util.h" |
4f5dd394 | 53 | #include "path-util.h" |
0b452006 | 54 | #include "process-util.h" |
4f5dd394 | 55 | #include "set.h" |
6eb7c172 | 56 | #include "signal-util.h" |
d3070fbd | 57 | #include "sparse-endian.h" |
e9db43d5 | 58 | #include "special.h" |
2e59b241 | 59 | #include "specifier.h" |
8fcde012 | 60 | #include "stat-util.h" |
d054f0a4 | 61 | #include "stdio-util.h" |
5afe510c | 62 | #include "string-table.h" |
07630cea | 63 | #include "string-util.h" |
4f5dd394 | 64 | #include "strv.h" |
4f4afc88 | 65 | #include "umask-util.h" |
4f5dd394 | 66 | #include "unit-name.h" |
e9db43d5 | 67 | #include "unit.h" |
b1d4f8e1 LP |
68 | #include "user-util.h" |
69 | #include "virt.h" | |
87f0e418 LP |
70 | |
71 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
72 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 LP |
73 | [UNIT_SOCKET] = &socket_vtable, |
74 | [UNIT_TARGET] = &target_vtable, | |
75 | [UNIT_DEVICE] = &device_vtable, | |
76 | [UNIT_MOUNT] = &mount_vtable, | |
77 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 78 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 79 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 80 | [UNIT_PATH] = &path_vtable, |
6c12b52e | 81 | [UNIT_SLICE] = &slice_vtable, |
5afe510c | 82 | [UNIT_SCOPE] = &scope_vtable, |
87f0e418 LP |
83 | }; |
84 | ||
f2341e0a | 85 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 86 | |
7d17cfbc | 87 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
88 | Unit *u; |
89 | ||
90 | assert(m); | |
ac155bb8 | 91 | assert(size >= sizeof(Unit)); |
87f0e418 | 92 | |
7d17cfbc MS |
93 | u = malloc0(size); |
94 | if (!u) | |
87f0e418 LP |
95 | return NULL; |
96 | ||
d5099efc | 97 | u->names = set_new(&string_hash_ops); |
6b430fdb ZJS |
98 | if (!u->names) |
99 | return mfree(u); | |
87f0e418 | 100 | |
ac155bb8 MS |
101 | u->manager = m; |
102 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
103 | u->default_dependencies = true; |
104 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 105 | u->unit_file_preset = -1; |
d420282b | 106 | u->on_failure_job_mode = JOB_REPLACE; |
efdb0237 | 107 | u->cgroup_inotify_wd = -1; |
36c16a7c | 108 | u->job_timeout = USEC_INFINITY; |
a2df3ea4 | 109 | u->job_running_timeout = USEC_INFINITY; |
00d9ef85 LP |
110 | u->ref_uid = UID_INVALID; |
111 | u->ref_gid = GID_INVALID; | |
fe700f46 | 112 | u->cpu_usage_last = NSEC_INFINITY; |
60c728ad | 113 | u->cgroup_bpf_state = UNIT_CGROUP_BPF_INVALIDATED; |
87f0e418 | 114 | |
6a48d82f DM |
115 | u->ip_accounting_ingress_map_fd = -1; |
116 | u->ip_accounting_egress_map_fd = -1; | |
117 | u->ipv4_allow_map_fd = -1; | |
118 | u->ipv6_allow_map_fd = -1; | |
119 | u->ipv4_deny_map_fd = -1; | |
120 | u->ipv6_deny_map_fd = -1; | |
121 | ||
2e59b241 LP |
122 | u->last_section_private = -1; |
123 | ||
6bf0f408 | 124 | RATELIMIT_INIT(u->start_limit, m->default_start_limit_interval, m->default_start_limit_burst); |
67bfdc97 | 125 | RATELIMIT_INIT(u->auto_stop_ratelimit, 10 * USEC_PER_SEC, 16); |
bea355da | 126 | |
87f0e418 LP |
127 | return u; |
128 | } | |
129 | ||
a581e45a LP |
130 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
131 | Unit *u; | |
132 | int r; | |
133 | ||
134 | u = unit_new(m, size); | |
135 | if (!u) | |
136 | return -ENOMEM; | |
137 | ||
138 | r = unit_add_name(u, name); | |
139 | if (r < 0) { | |
140 | unit_free(u); | |
141 | return r; | |
142 | } | |
143 | ||
144 | *ret = u; | |
145 | return r; | |
146 | } | |
147 | ||
f278026d LP |
148 | bool unit_has_name(Unit *u, const char *name) { |
149 | assert(u); | |
150 | assert(name); | |
151 | ||
390bc2b1 | 152 | return set_contains(u->names, (char*) name); |
f278026d LP |
153 | } |
154 | ||
598459ce LP |
155 | static void unit_init(Unit *u) { |
156 | CGroupContext *cc; | |
157 | ExecContext *ec; | |
158 | KillContext *kc; | |
159 | ||
160 | assert(u); | |
161 | assert(u->manager); | |
162 | assert(u->type >= 0); | |
163 | ||
164 | cc = unit_get_cgroup_context(u); | |
165 | if (cc) { | |
166 | cgroup_context_init(cc); | |
167 | ||
168 | /* Copy in the manager defaults into the cgroup | |
169 | * context, _before_ the rest of the settings have | |
170 | * been initialized */ | |
171 | ||
172 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
13c31542 | 173 | cc->io_accounting = u->manager->default_io_accounting; |
377bfd2d | 174 | cc->ip_accounting = u->manager->default_ip_accounting; |
598459ce LP |
175 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
176 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 177 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
6a48d82f | 178 | cc->ip_accounting = u->manager->default_ip_accounting; |
0af20ea2 LP |
179 | |
180 | if (u->type != UNIT_SLICE) | |
181 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
182 | } |
183 | ||
184 | ec = unit_get_exec_context(u); | |
b1edf445 | 185 | if (ec) { |
598459ce LP |
186 | exec_context_init(ec); |
187 | ||
b1edf445 LP |
188 | ec->keyring_mode = MANAGER_IS_SYSTEM(u->manager) ? |
189 | EXEC_KEYRING_PRIVATE : EXEC_KEYRING_INHERIT; | |
190 | } | |
191 | ||
598459ce LP |
192 | kc = unit_get_kill_context(u); |
193 | if (kc) | |
194 | kill_context_init(kc); | |
195 | ||
196 | if (UNIT_VTABLE(u)->init) | |
197 | UNIT_VTABLE(u)->init(u); | |
198 | } | |
199 | ||
87f0e418 | 200 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 201 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 202 | UnitType t; |
87f0e418 LP |
203 | int r; |
204 | ||
205 | assert(u); | |
206 | assert(text); | |
207 | ||
7410616c | 208 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 209 | |
ac155bb8 | 210 | if (!u->instance) |
9e2f7c11 | 211 | return -EINVAL; |
87f0e418 | 212 | |
7410616c LP |
213 | r = unit_name_replace_instance(text, u->instance, &s); |
214 | if (r < 0) | |
215 | return r; | |
216 | } else { | |
9e2f7c11 | 217 | s = strdup(text); |
7410616c LP |
218 | if (!s) |
219 | return -ENOMEM; | |
220 | } | |
87f0e418 | 221 | |
7410616c LP |
222 | if (set_contains(u->names, s)) |
223 | return 0; | |
224 | if (hashmap_contains(u->manager->units, s)) | |
225 | return -EEXIST; | |
226 | ||
227 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 228 | return -EINVAL; |
e537352b | 229 | |
7410616c LP |
230 | t = unit_name_to_type(s); |
231 | if (t < 0) | |
232 | return -EINVAL; | |
87f0e418 | 233 | |
598459ce LP |
234 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
235 | return -EINVAL; | |
87f0e418 | 236 | |
e48614c4 ZJS |
237 | r = unit_name_to_instance(s, &i); |
238 | if (r < 0) | |
598459ce | 239 | return r; |
87f0e418 | 240 | |
ce99c68a | 241 | if (i && !unit_type_may_template(t)) |
598459ce | 242 | return -EINVAL; |
9e2f7c11 | 243 | |
276c3e78 | 244 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
245 | * but not both. Note that we do allow names with different |
246 | * instance names however! */ | |
598459ce LP |
247 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
248 | return -EINVAL; | |
9e2f7c11 | 249 | |
8a993b61 | 250 | if (!unit_type_may_alias(t) && !set_isempty(u->names)) |
598459ce | 251 | return -EEXIST; |
9e2f7c11 | 252 | |
598459ce LP |
253 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
254 | return -E2BIG; | |
4f0f902f | 255 | |
e48614c4 | 256 | r = set_put(u->names, s); |
7410616c | 257 | if (r < 0) |
598459ce | 258 | return r; |
7410616c | 259 | assert(r > 0); |
87f0e418 | 260 | |
e48614c4 ZJS |
261 | r = hashmap_put(u->manager->units, s, u); |
262 | if (r < 0) { | |
7410616c | 263 | (void) set_remove(u->names, s); |
598459ce | 264 | return r; |
87f0e418 LP |
265 | } |
266 | ||
ac155bb8 | 267 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
268 | u->type = t; |
269 | u->id = s; | |
270 | u->instance = i; | |
9e2f7c11 | 271 | |
71fda00f | 272 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 273 | |
598459ce | 274 | unit_init(u); |
87f0e418 | 275 | |
598459ce LP |
276 | i = NULL; |
277 | } | |
9e2f7c11 | 278 | |
598459ce | 279 | s = NULL; |
9e2f7c11 | 280 | |
598459ce LP |
281 | unit_add_to_dbus_queue(u); |
282 | return 0; | |
87f0e418 LP |
283 | } |
284 | ||
0ae97ec1 | 285 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 286 | _cleanup_free_ char *t = NULL; |
598459ce | 287 | char *s, *i; |
276c3e78 | 288 | int r; |
0ae97ec1 LP |
289 | |
290 | assert(u); | |
291 | assert(name); | |
292 | ||
7410616c | 293 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 294 | |
ac155bb8 | 295 | if (!u->instance) |
9e2f7c11 LP |
296 | return -EINVAL; |
297 | ||
7410616c LP |
298 | r = unit_name_replace_instance(name, u->instance, &t); |
299 | if (r < 0) | |
300 | return r; | |
9e2f7c11 LP |
301 | |
302 | name = t; | |
303 | } | |
304 | ||
0ae97ec1 | 305 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 306 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 307 | if (!s) |
0ae97ec1 LP |
308 | return -ENOENT; |
309 | ||
7410616c | 310 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
311 | r = unit_name_to_instance(s, &i); |
312 | if (r < 0) | |
276c3e78 LP |
313 | return r; |
314 | ||
ac155bb8 | 315 | u->id = s; |
276c3e78 | 316 | |
ac155bb8 MS |
317 | free(u->instance); |
318 | u->instance = i; | |
276c3e78 | 319 | |
c1e1601e | 320 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 321 | |
0ae97ec1 LP |
322 | return 0; |
323 | } | |
324 | ||
f50e0a01 | 325 | int unit_set_description(Unit *u, const char *description) { |
84b26d51 | 326 | int r; |
f50e0a01 LP |
327 | |
328 | assert(u); | |
329 | ||
84b26d51 LP |
330 | r = free_and_strdup(&u->description, empty_to_null(description)); |
331 | if (r < 0) | |
332 | return r; | |
333 | if (r > 0) | |
334 | unit_add_to_dbus_queue(u); | |
c1e1601e | 335 | |
f50e0a01 LP |
336 | return 0; |
337 | } | |
338 | ||
701cc384 | 339 | bool unit_check_gc(Unit *u) { |
a354329f | 340 | UnitActiveState state; |
e98b2fbb | 341 | int r; |
5afe510c | 342 | |
701cc384 LP |
343 | assert(u); |
344 | ||
5afe510c LP |
345 | /* Checks whether the unit is ready to be unloaded for garbage collection. Returns true, when the unit shall |
346 | * stay around, false if there's no reason to keep it loaded. */ | |
347 | ||
a354329f | 348 | if (u->job) |
701cc384 LP |
349 | return true; |
350 | ||
a354329f | 351 | if (u->nop_job) |
6c073082 LP |
352 | return true; |
353 | ||
a354329f LP |
354 | state = unit_active_state(u); |
355 | ||
7eb2a8a1 | 356 | /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */ |
a354329f LP |
357 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && |
358 | UNIT_VTABLE(u)->release_resources) | |
7eb2a8a1 | 359 | UNIT_VTABLE(u)->release_resources(u); |
a354329f | 360 | |
f5869324 | 361 | if (u->perpetual) |
701cc384 LP |
362 | return true; |
363 | ||
9d576438 LP |
364 | if (u->refs) |
365 | return true; | |
366 | ||
05a98afd LP |
367 | if (sd_bus_track_count(u->bus_track) > 0) |
368 | return true; | |
369 | ||
5afe510c LP |
370 | /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */ |
371 | switch (u->collect_mode) { | |
372 | ||
373 | case COLLECT_INACTIVE: | |
374 | if (state != UNIT_INACTIVE) | |
375 | return true; | |
376 | ||
377 | break; | |
378 | ||
379 | case COLLECT_INACTIVE_OR_FAILED: | |
380 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
381 | return true; | |
382 | ||
383 | break; | |
384 | ||
385 | default: | |
386 | assert_not_reached("Unknown garbage collection mode"); | |
387 | } | |
388 | ||
e98b2fbb LP |
389 | if (u->cgroup_path) { |
390 | /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay | |
391 | * around. Units with active processes should never be collected. */ | |
392 | ||
393 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
394 | if (r < 0) | |
395 | log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", u->cgroup_path); | |
396 | if (r <= 0) | |
397 | return true; | |
398 | } | |
399 | ||
701cc384 LP |
400 | if (UNIT_VTABLE(u)->check_gc) |
401 | if (UNIT_VTABLE(u)->check_gc(u)) | |
402 | return true; | |
403 | ||
404 | return false; | |
405 | } | |
406 | ||
87f0e418 LP |
407 | void unit_add_to_load_queue(Unit *u) { |
408 | assert(u); | |
ac155bb8 | 409 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 410 | |
ac155bb8 | 411 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
412 | return; |
413 | ||
71fda00f | 414 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 415 | u->in_load_queue = true; |
87f0e418 LP |
416 | } |
417 | ||
23a177ef LP |
418 | void unit_add_to_cleanup_queue(Unit *u) { |
419 | assert(u); | |
420 | ||
ac155bb8 | 421 | if (u->in_cleanup_queue) |
23a177ef LP |
422 | return; |
423 | ||
71fda00f | 424 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 425 | u->in_cleanup_queue = true; |
23a177ef LP |
426 | } |
427 | ||
701cc384 LP |
428 | void unit_add_to_gc_queue(Unit *u) { |
429 | assert(u); | |
430 | ||
ac155bb8 | 431 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
432 | return; |
433 | ||
434 | if (unit_check_gc(u)) | |
435 | return; | |
436 | ||
c5a97ed1 | 437 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 438 | u->in_gc_queue = true; |
701cc384 LP |
439 | } |
440 | ||
c1e1601e LP |
441 | void unit_add_to_dbus_queue(Unit *u) { |
442 | assert(u); | |
ac155bb8 | 443 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 444 | |
ac155bb8 | 445 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
446 | return; |
447 | ||
a567261a | 448 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 449 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 450 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 451 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 452 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
453 | return; |
454 | } | |
455 | ||
71fda00f | 456 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 457 | u->in_dbus_queue = true; |
c1e1601e LP |
458 | } |
459 | ||
eef85c4a | 460 | static void bidi_set_free(Unit *u, Hashmap *h) { |
87f0e418 | 461 | Unit *other; |
eef85c4a LP |
462 | Iterator i; |
463 | void *v; | |
87f0e418 LP |
464 | |
465 | assert(u); | |
466 | ||
eef85c4a | 467 | /* Frees the hashmap and makes sure we are dropped from the inverse pointers */ |
87f0e418 | 468 | |
eef85c4a | 469 | HASHMAP_FOREACH_KEY(v, other, h, i) { |
87f0e418 LP |
470 | UnitDependency d; |
471 | ||
472 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
eef85c4a | 473 | hashmap_remove(other->dependencies[d], u); |
701cc384 LP |
474 | |
475 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
476 | } |
477 | ||
eef85c4a | 478 | hashmap_free(h); |
87f0e418 LP |
479 | } |
480 | ||
c2756a68 LP |
481 | static void unit_remove_transient(Unit *u) { |
482 | char **i; | |
483 | ||
484 | assert(u); | |
485 | ||
486 | if (!u->transient) | |
487 | return; | |
488 | ||
489 | if (u->fragment_path) | |
3f5e8115 | 490 | (void) unlink(u->fragment_path); |
c2756a68 LP |
491 | |
492 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 493 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 494 | |
39591351 LP |
495 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
496 | if (!p) | |
497 | continue; | |
498 | ||
499 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
500 | if (!pp) | |
501 | continue; | |
502 | ||
503 | /* Only drop transient drop-ins */ | |
504 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
505 | continue; | |
c2756a68 | 506 | |
39591351 LP |
507 | (void) unlink(*i); |
508 | (void) rmdir(p); | |
c2756a68 LP |
509 | } |
510 | } | |
511 | ||
a57f7e2c | 512 | static void unit_free_requires_mounts_for(Unit *u) { |
eef85c4a | 513 | assert(u); |
a57f7e2c | 514 | |
eef85c4a LP |
515 | for (;;) { |
516 | _cleanup_free_ char *path; | |
a57f7e2c | 517 | |
eef85c4a LP |
518 | path = hashmap_steal_first_key(u->requires_mounts_for); |
519 | if (!path) | |
520 | break; | |
521 | else { | |
522 | char s[strlen(path) + 1]; | |
a57f7e2c | 523 | |
eef85c4a LP |
524 | PATH_FOREACH_PREFIX_MORE(s, path) { |
525 | char *y; | |
526 | Set *x; | |
527 | ||
528 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
529 | if (!x) | |
530 | continue; | |
a57f7e2c | 531 | |
eef85c4a | 532 | (void) set_remove(x, u); |
a57f7e2c | 533 | |
eef85c4a LP |
534 | if (set_isempty(x)) { |
535 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
536 | free(y); | |
537 | set_free(x); | |
538 | } | |
a57f7e2c LP |
539 | } |
540 | } | |
541 | } | |
542 | ||
eef85c4a | 543 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
a57f7e2c LP |
544 | } |
545 | ||
598459ce LP |
546 | static void unit_done(Unit *u) { |
547 | ExecContext *ec; | |
548 | CGroupContext *cc; | |
549 | ||
550 | assert(u); | |
551 | ||
552 | if (u->type < 0) | |
553 | return; | |
554 | ||
555 | if (UNIT_VTABLE(u)->done) | |
556 | UNIT_VTABLE(u)->done(u); | |
557 | ||
558 | ec = unit_get_exec_context(u); | |
559 | if (ec) | |
560 | exec_context_done(ec); | |
561 | ||
562 | cc = unit_get_cgroup_context(u); | |
563 | if (cc) | |
564 | cgroup_context_done(cc); | |
565 | } | |
566 | ||
87f0e418 LP |
567 | void unit_free(Unit *u) { |
568 | UnitDependency d; | |
569 | Iterator i; | |
570 | char *t; | |
571 | ||
c9d5c9c0 LP |
572 | if (!u) |
573 | return; | |
87f0e418 | 574 | |
50fb00b7 | 575 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 576 | |
2c289ea8 | 577 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
578 | unit_remove_transient(u); |
579 | ||
c1e1601e LP |
580 | bus_unit_send_removed_signal(u); |
581 | ||
598459ce | 582 | unit_done(u); |
a013b84b | 583 | |
cf9fd508 DM |
584 | sd_bus_slot_unref(u->match_bus_slot); |
585 | ||
05a98afd LP |
586 | sd_bus_track_unref(u->bus_track); |
587 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
588 | ||
a57f7e2c LP |
589 | unit_free_requires_mounts_for(u); |
590 | ||
ac155bb8 MS |
591 | SET_FOREACH(t, u->names, i) |
592 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 593 | |
4b58153d LP |
594 | if (!sd_id128_is_null(u->invocation_id)) |
595 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
596 | ||
97e7d748 MS |
597 | if (u->job) { |
598 | Job *j = u->job; | |
599 | job_uninstall(j); | |
600 | job_free(j); | |
601 | } | |
964e0949 | 602 | |
e0209d83 MS |
603 | if (u->nop_job) { |
604 | Job *j = u->nop_job; | |
605 | job_uninstall(j); | |
606 | job_free(j); | |
607 | } | |
608 | ||
964e0949 | 609 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 610 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 611 | |
ac155bb8 | 612 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 613 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 614 | |
ac155bb8 | 615 | if (u->in_load_queue) |
71fda00f | 616 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 617 | |
ac155bb8 | 618 | if (u->in_dbus_queue) |
71fda00f | 619 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 620 | |
ac155bb8 | 621 | if (u->in_cleanup_queue) |
71fda00f | 622 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 623 | |
a2d72e26 | 624 | if (u->in_gc_queue) |
c5a97ed1 | 625 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 626 | |
91a6073e LP |
627 | if (u->in_cgroup_realize_queue) |
628 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 629 | |
09e24654 LP |
630 | if (u->in_cgroup_empty_queue) |
631 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
632 | ||
efdb0237 | 633 | unit_release_cgroup(u); |
72673e86 | 634 | |
d3070fbd LP |
635 | if (!MANAGER_IS_RELOADING(u->manager)) |
636 | unit_unlink_state_files(u); | |
637 | ||
00d9ef85 LP |
638 | unit_unref_uid_gid(u, false); |
639 | ||
5269eb6b | 640 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 641 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 642 | |
ac155bb8 | 643 | free(u->description); |
49dbfa7b | 644 | strv_free(u->documentation); |
ac155bb8 | 645 | free(u->fragment_path); |
1b64d026 | 646 | free(u->source_path); |
ae7a7182 | 647 | strv_free(u->dropin_paths); |
ac155bb8 | 648 | free(u->instance); |
87f0e418 | 649 | |
f189ab18 LP |
650 | free(u->job_timeout_reboot_arg); |
651 | ||
ac155bb8 | 652 | set_free_free(u->names); |
87f0e418 | 653 | |
a911bb9a LP |
654 | unit_unwatch_all_pids(u); |
655 | ||
ac155bb8 | 656 | condition_free_list(u->conditions); |
59fccdc5 | 657 | condition_free_list(u->asserts); |
52661efd | 658 | |
6bf0f408 LP |
659 | free(u->reboot_arg); |
660 | ||
702a2d8f LP |
661 | unit_ref_unset(&u->slice); |
662 | ||
ac155bb8 MS |
663 | while (u->refs) |
664 | unit_ref_unset(u->refs); | |
57020a3a | 665 | |
6a48d82f DM |
666 | safe_close(u->ip_accounting_ingress_map_fd); |
667 | safe_close(u->ip_accounting_egress_map_fd); | |
668 | ||
669 | safe_close(u->ipv4_allow_map_fd); | |
670 | safe_close(u->ipv6_allow_map_fd); | |
671 | safe_close(u->ipv4_deny_map_fd); | |
672 | safe_close(u->ipv6_deny_map_fd); | |
673 | ||
674 | bpf_program_unref(u->ip_bpf_ingress); | |
675 | bpf_program_unref(u->ip_bpf_egress); | |
676 | ||
87f0e418 LP |
677 | free(u); |
678 | } | |
679 | ||
680 | UnitActiveState unit_active_state(Unit *u) { | |
681 | assert(u); | |
682 | ||
ac155bb8 | 683 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
684 | return unit_active_state(unit_follow_merge(u)); |
685 | ||
686 | /* After a reload it might happen that a unit is not correctly | |
687 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 688 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
689 | |
690 | return UNIT_VTABLE(u)->active_state(u); | |
691 | } | |
692 | ||
10a94420 LP |
693 | const char* unit_sub_state_to_string(Unit *u) { |
694 | assert(u); | |
695 | ||
696 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
697 | } | |
698 | ||
eef85c4a LP |
699 | static int set_complete_move(Set **s, Set **other) { |
700 | assert(s); | |
701 | assert(other); | |
702 | ||
703 | if (!other) | |
704 | return 0; | |
705 | ||
706 | if (*s) | |
707 | return set_move(*s, *other); | |
708 | else { | |
709 | *s = *other; | |
710 | *other = NULL; | |
711 | } | |
7c0b05e5 | 712 | |
eef85c4a LP |
713 | return 0; |
714 | } | |
715 | ||
716 | static int hashmap_complete_move(Hashmap **s, Hashmap **other) { | |
23a177ef LP |
717 | assert(s); |
718 | assert(other); | |
87f0e418 | 719 | |
23a177ef | 720 | if (!*other) |
7c0b05e5 | 721 | return 0; |
87f0e418 | 722 | |
eef85c4a LP |
723 | if (*s) |
724 | return hashmap_move(*s, *other); | |
725 | else { | |
23a177ef LP |
726 | *s = *other; |
727 | *other = NULL; | |
728 | } | |
7c0b05e5 MS |
729 | |
730 | return 0; | |
23a177ef | 731 | } |
87f0e418 | 732 | |
7c0b05e5 | 733 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
734 | char *t; |
735 | Iterator i; | |
7c0b05e5 | 736 | int r; |
87f0e418 | 737 | |
23a177ef LP |
738 | assert(u); |
739 | assert(other); | |
740 | ||
eef85c4a | 741 | r = set_complete_move(&u->names, &other->names); |
7c0b05e5 MS |
742 | if (r < 0) |
743 | return r; | |
23a177ef | 744 | |
ac155bb8 MS |
745 | set_free_free(other->names); |
746 | other->names = NULL; | |
747 | other->id = NULL; | |
23a177ef | 748 | |
ac155bb8 MS |
749 | SET_FOREACH(t, u->names, i) |
750 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
751 | |
752 | return 0; | |
87f0e418 LP |
753 | } |
754 | ||
09a65f92 MS |
755 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
756 | unsigned n_reserve; | |
757 | ||
758 | assert(u); | |
759 | assert(other); | |
760 | assert(d < _UNIT_DEPENDENCY_MAX); | |
761 | ||
762 | /* | |
763 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 764 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
765 | * as a whole to u by complete_move(). |
766 | */ | |
767 | if (!u->dependencies[d]) | |
768 | return 0; | |
769 | ||
770 | /* merge_dependencies() will skip a u-on-u dependency */ | |
eef85c4a | 771 | n_reserve = hashmap_size(other->dependencies[d]) - !!hashmap_get(other->dependencies[d], u); |
09a65f92 | 772 | |
eef85c4a | 773 | return hashmap_reserve(u->dependencies[d], n_reserve); |
09a65f92 MS |
774 | } |
775 | ||
d1fab3fe | 776 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
777 | Iterator i; |
778 | Unit *back; | |
eef85c4a | 779 | void *v; |
87f0e418 | 780 | int r; |
23a177ef | 781 | |
eef85c4a LP |
782 | /* Merges all dependencies of type 'd' of the unit 'other' into the deps of the unit 'u' */ |
783 | ||
23a177ef LP |
784 | assert(u); |
785 | assert(other); | |
786 | assert(d < _UNIT_DEPENDENCY_MAX); | |
787 | ||
eef85c4a LP |
788 | /* Fix backwards pointers. Let's iterate through all dependendent units of the other unit. */ |
789 | HASHMAP_FOREACH_KEY(v, back, other->dependencies[d], i) { | |
23a177ef LP |
790 | UnitDependency k; |
791 | ||
eef85c4a LP |
792 | /* Let's now iterate through the dependencies of that dependencies of the other units, looking for |
793 | * pointers back, and let's fix them up, to instead point to 'u'. */ | |
794 | ||
e48614c4 | 795 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff | 796 | if (back == u) { |
eef85c4a LP |
797 | /* Do not add dependencies between u and itself. */ |
798 | if (hashmap_remove(back->dependencies[k], other)) | |
f2341e0a | 799 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff | 800 | } else { |
eef85c4a LP |
801 | UnitDependencyInfo di_u, di_other, di_merged; |
802 | ||
803 | /* Let's drop this dependency between "back" and "other", and let's create it between | |
804 | * "back" and "u" instead. Let's merge the bit masks of the dependency we are moving, | |
805 | * and any such dependency which might already exist */ | |
806 | ||
807 | di_other.data = hashmap_get(back->dependencies[k], other); | |
808 | if (!di_other.data) | |
809 | continue; /* dependency isn't set, let's try the next one */ | |
810 | ||
811 | di_u.data = hashmap_get(back->dependencies[k], u); | |
812 | ||
813 | di_merged = (UnitDependencyInfo) { | |
814 | .origin_mask = di_u.origin_mask | di_other.origin_mask, | |
815 | .destination_mask = di_u.destination_mask | di_other.destination_mask, | |
816 | }; | |
817 | ||
818 | r = hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data); | |
819 | if (r < 0) | |
820 | log_warning_errno(r, "Failed to remove/replace: back=%s other=%s u=%s: %m", back->id, other_id, u->id); | |
821 | assert(r >= 0); | |
822 | ||
823 | /* assert_se(hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data) >= 0); */ | |
e66047ff | 824 | } |
e48614c4 | 825 | } |
eef85c4a | 826 | |
23a177ef LP |
827 | } |
828 | ||
e66047ff | 829 | /* Also do not move dependencies on u to itself */ |
eef85c4a | 830 | back = hashmap_remove(other->dependencies[d], u); |
d1fab3fe | 831 | if (back) |
f2341e0a | 832 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 833 | |
7c0b05e5 | 834 | /* The move cannot fail. The caller must have performed a reservation. */ |
eef85c4a | 835 | assert_se(hashmap_complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); |
23a177ef | 836 | |
eef85c4a | 837 | other->dependencies[d] = hashmap_free(other->dependencies[d]); |
23a177ef LP |
838 | } |
839 | ||
840 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 841 | UnitDependency d; |
d1fab3fe | 842 | const char *other_id = NULL; |
09a65f92 | 843 | int r; |
87f0e418 LP |
844 | |
845 | assert(u); | |
846 | assert(other); | |
ac155bb8 MS |
847 | assert(u->manager == other->manager); |
848 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 849 | |
cc916967 LP |
850 | other = unit_follow_merge(other); |
851 | ||
23a177ef LP |
852 | if (other == u) |
853 | return 0; | |
854 | ||
ac155bb8 | 855 | if (u->type != other->type) |
9e2f7c11 LP |
856 | return -EINVAL; |
857 | ||
ac155bb8 | 858 | if (!u->instance != !other->instance) |
87f0e418 LP |
859 | return -EINVAL; |
860 | ||
8a993b61 | 861 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
862 | return -EEXIST; |
863 | ||
ec2ce0c5 | 864 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 865 | return -EEXIST; |
87f0e418 | 866 | |
ac155bb8 | 867 | if (other->job) |
819e213f LP |
868 | return -EEXIST; |
869 | ||
e0209d83 MS |
870 | if (other->nop_job) |
871 | return -EEXIST; | |
872 | ||
fdf20a31 | 873 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
874 | return -EEXIST; |
875 | ||
d1fab3fe ZJS |
876 | if (other->id) |
877 | other_id = strdupa(other->id); | |
878 | ||
09a65f92 MS |
879 | /* Make reservations to ensure merge_dependencies() won't fail */ |
880 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
881 | r = reserve_dependencies(u, other, d); | |
882 | /* | |
883 | * We don't rollback reservations if we fail. We don't have | |
884 | * a way to undo reservations. A reservation is not a leak. | |
885 | */ | |
886 | if (r < 0) | |
887 | return r; | |
888 | } | |
889 | ||
87f0e418 | 890 | /* Merge names */ |
7c0b05e5 MS |
891 | r = merge_names(u, other); |
892 | if (r < 0) | |
893 | return r; | |
87f0e418 | 894 | |
57020a3a | 895 | /* Redirect all references */ |
ac155bb8 MS |
896 | while (other->refs) |
897 | unit_ref_set(other->refs, u); | |
57020a3a | 898 | |
87f0e418 LP |
899 | /* Merge dependencies */ |
900 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 901 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 902 | |
ac155bb8 MS |
903 | other->load_state = UNIT_MERGED; |
904 | other->merged_into = u; | |
23a177ef | 905 | |
3616a49c LP |
906 | /* If there is still some data attached to the other node, we |
907 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 908 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
909 | if (UNIT_VTABLE(other)->done) |
910 | UNIT_VTABLE(other)->done(other); | |
911 | ||
912 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
913 | unit_add_to_cleanup_queue(other); |
914 | ||
915 | return 0; | |
916 | } | |
917 | ||
918 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 919 | _cleanup_free_ char *s = NULL; |
23a177ef | 920 | Unit *other; |
9e2f7c11 | 921 | int r; |
23a177ef LP |
922 | |
923 | assert(u); | |
924 | assert(name); | |
925 | ||
7410616c | 926 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 927 | if (!u->instance) |
9e2f7c11 LP |
928 | return -EINVAL; |
929 | ||
7410616c LP |
930 | r = unit_name_replace_instance(name, u->instance, &s); |
931 | if (r < 0) | |
932 | return r; | |
9e2f7c11 LP |
933 | |
934 | name = s; | |
935 | } | |
936 | ||
c2756a68 | 937 | other = manager_get_unit(u->manager, name); |
7410616c LP |
938 | if (other) |
939 | return unit_merge(u, other); | |
23a177ef | 940 | |
7410616c | 941 | return unit_add_name(u, name); |
23a177ef LP |
942 | } |
943 | ||
944 | Unit* unit_follow_merge(Unit *u) { | |
945 | assert(u); | |
946 | ||
ac155bb8 MS |
947 | while (u->load_state == UNIT_MERGED) |
948 | assert_se(u = u->merged_into); | |
23a177ef LP |
949 | |
950 | return u; | |
951 | } | |
952 | ||
953 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
ada5e276 YW |
954 | ExecDirectoryType dt; |
955 | char **dp; | |
23a177ef LP |
956 | int r; |
957 | ||
958 | assert(u); | |
959 | assert(c); | |
960 | ||
36be24c8 | 961 | if (c->working_directory) { |
eef85c4a | 962 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
963 | if (r < 0) |
964 | return r; | |
965 | } | |
966 | ||
967 | if (c->root_directory) { | |
eef85c4a | 968 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
969 | if (r < 0) |
970 | return r; | |
971 | } | |
972 | ||
915e6d16 | 973 | if (c->root_image) { |
eef85c4a | 974 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
975 | if (r < 0) |
976 | return r; | |
977 | } | |
978 | ||
72fd1768 | 979 | for (dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
980 | if (!u->manager->prefix[dt]) |
981 | continue; | |
982 | ||
983 | STRV_FOREACH(dp, c->directories[dt].paths) { | |
984 | _cleanup_free_ char *p; | |
985 | ||
986 | p = strjoin(u->manager->prefix[dt], "/", *dp); | |
987 | if (!p) | |
988 | return -ENOMEM; | |
989 | ||
eef85c4a | 990 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
991 | if (r < 0) |
992 | return r; | |
993 | } | |
994 | } | |
995 | ||
463d0d15 | 996 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
997 | return 0; |
998 | ||
999 | if (c->private_tmp) { | |
d71f0505 LP |
1000 | const char *p; |
1001 | ||
1002 | FOREACH_STRING(p, "/tmp", "/var/tmp") { | |
eef85c4a | 1003 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
d71f0505 LP |
1004 | if (r < 0) |
1005 | return r; | |
1006 | } | |
b46a529c | 1007 | |
eef85c4a | 1008 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, NULL, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1009 | if (r < 0) |
1010 | return r; | |
1011 | } | |
1012 | ||
52c239d7 LB |
1013 | if (!IN_SET(c->std_output, |
1014 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1015 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1016 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE) && | |
1017 | !IN_SET(c->std_error, | |
1018 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1019 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1020 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE)) | |
23a177ef LP |
1021 | return 0; |
1022 | ||
1023 | /* If syslog or kernel logging is requested, make sure our own | |
1024 | * logging daemon is run first. */ | |
1025 | ||
eef85c4a | 1026 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1027 | if (r < 0) |
1028 | return r; | |
23a177ef | 1029 | |
87f0e418 LP |
1030 | return 0; |
1031 | } | |
1032 | ||
87f0e418 LP |
1033 | const char *unit_description(Unit *u) { |
1034 | assert(u); | |
1035 | ||
ac155bb8 MS |
1036 | if (u->description) |
1037 | return u->description; | |
87f0e418 | 1038 | |
ac155bb8 | 1039 | return strna(u->id); |
87f0e418 LP |
1040 | } |
1041 | ||
eef85c4a LP |
1042 | static void print_unit_dependency_mask(FILE *f, const char *kind, UnitDependencyMask mask, bool *space) { |
1043 | const struct { | |
1044 | UnitDependencyMask mask; | |
1045 | const char *name; | |
1046 | } table[] = { | |
1047 | { UNIT_DEPENDENCY_FILE, "file" }, | |
1048 | { UNIT_DEPENDENCY_IMPLICIT, "implicit" }, | |
1049 | { UNIT_DEPENDENCY_DEFAULT, "default" }, | |
1050 | { UNIT_DEPENDENCY_UDEV, "udev" }, | |
1051 | { UNIT_DEPENDENCY_PATH, "path" }, | |
1052 | { UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT, "mountinfo-implicit" }, | |
1053 | { UNIT_DEPENDENCY_MOUNTINFO_DEFAULT, "mountinfo-default" }, | |
1054 | { UNIT_DEPENDENCY_PROC_SWAP, "proc-swap" }, | |
1055 | }; | |
1056 | size_t i; | |
1057 | ||
1058 | assert(f); | |
1059 | assert(kind); | |
1060 | assert(space); | |
1061 | ||
1062 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
1063 | ||
1064 | if (mask == 0) | |
1065 | break; | |
1066 | ||
1067 | if ((mask & table[i].mask) == table[i].mask) { | |
1068 | if (*space) | |
1069 | fputc(' ', f); | |
1070 | else | |
1071 | *space = true; | |
1072 | ||
1073 | fputs(kind, f); | |
1074 | fputs("-", f); | |
1075 | fputs(table[i].name, f); | |
1076 | ||
1077 | mask &= ~table[i].mask; | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | assert(mask == 0); | |
1082 | } | |
1083 | ||
87f0e418 | 1084 | void unit_dump(Unit *u, FILE *f, const char *prefix) { |
49dbfa7b | 1085 | char *t, **j; |
87f0e418 LP |
1086 | UnitDependency d; |
1087 | Iterator i; | |
47be870b | 1088 | const char *prefix2; |
173e3821 | 1089 | char |
a483fb59 | 1090 | timestamp0[FORMAT_TIMESTAMP_MAX], |
173e3821 LP |
1091 | timestamp1[FORMAT_TIMESTAMP_MAX], |
1092 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
1093 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
1094 | timestamp4[FORMAT_TIMESTAMP_MAX], |
1095 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 1096 | Unit *following; |
eeaedb7c | 1097 | _cleanup_set_free_ Set *following_set = NULL; |
05a98afd | 1098 | const char *n; |
02638280 LP |
1099 | CGroupMask m; |
1100 | int r; | |
87f0e418 LP |
1101 | |
1102 | assert(u); | |
ac155bb8 | 1103 | assert(u->type >= 0); |
87f0e418 | 1104 | |
4c940960 | 1105 | prefix = strempty(prefix); |
63c372cb | 1106 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
1107 | |
1108 | fprintf(f, | |
40d50879 | 1109 | "%s-> Unit %s:\n" |
87f0e418 | 1110 | "%s\tDescription: %s\n" |
9e2f7c11 | 1111 | "%s\tInstance: %s\n" |
87f0e418 | 1112 | "%s\tUnit Load State: %s\n" |
2fad8195 | 1113 | "%s\tUnit Active State: %s\n" |
b895d155 | 1114 | "%s\tState Change Timestamp: %s\n" |
173e3821 | 1115 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 1116 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 1117 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 1118 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 1119 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 1120 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 1121 | "%s\tTransient: %s\n" |
f5869324 | 1122 | "%s\tPerpetual: %s\n" |
5afe510c | 1123 | "%s\tGarbage Collection Mode: %s\n" |
4ad49000 LP |
1124 | "%s\tSlice: %s\n" |
1125 | "%s\tCGroup: %s\n" | |
aae7e17f | 1126 | "%s\tCGroup realized: %s\n", |
ac155bb8 | 1127 | prefix, u->id, |
87f0e418 | 1128 | prefix, unit_description(u), |
ac155bb8 MS |
1129 | prefix, strna(u->instance), |
1130 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 1131 | prefix, unit_active_state_to_string(unit_active_state(u)), |
a483fb59 | 1132 | prefix, strna(format_timestamp(timestamp0, sizeof(timestamp0), u->state_change_timestamp.realtime)), |
ac155bb8 MS |
1133 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
1134 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
1135 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
1136 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 1137 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 1138 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 1139 | prefix, yes_no(u->transient), |
f5869324 | 1140 | prefix, yes_no(u->perpetual), |
5afe510c | 1141 | prefix, collect_mode_to_string(u->collect_mode), |
4ad49000 LP |
1142 | prefix, strna(unit_slice_name(u)), |
1143 | prefix, strna(u->cgroup_path), | |
aae7e17f FB |
1144 | prefix, yes_no(u->cgroup_realized)); |
1145 | ||
1146 | if (u->cgroup_realized_mask != 0) { | |
1147 | _cleanup_free_ char *s = NULL; | |
1148 | (void) cg_mask_to_string(u->cgroup_realized_mask, &s); | |
02638280 LP |
1149 | fprintf(f, "%s\tCGroup realized mask: %s\n", prefix, strnull(s)); |
1150 | } | |
1151 | if (u->cgroup_enabled_mask != 0) { | |
1152 | _cleanup_free_ char *s = NULL; | |
1153 | (void) cg_mask_to_string(u->cgroup_enabled_mask, &s); | |
1154 | fprintf(f, "%s\tCGroup enabled mask: %s\n", prefix, strnull(s)); | |
1155 | } | |
1156 | m = unit_get_own_mask(u); | |
1157 | if (m != 0) { | |
1158 | _cleanup_free_ char *s = NULL; | |
1159 | (void) cg_mask_to_string(m, &s); | |
1160 | fprintf(f, "%s\tCGroup own mask: %s\n", prefix, strnull(s)); | |
aae7e17f | 1161 | } |
02638280 LP |
1162 | m = unit_get_members_mask(u); |
1163 | if (m != 0) { | |
aae7e17f | 1164 | _cleanup_free_ char *s = NULL; |
02638280 | 1165 | (void) cg_mask_to_string(m, &s); |
aae7e17f FB |
1166 | fprintf(f, "%s\tCGroup members mask: %s\n", prefix, strnull(s)); |
1167 | } | |
0301abf4 | 1168 | |
ac155bb8 | 1169 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
1170 | fprintf(f, "%s\tName: %s\n", prefix, t); |
1171 | ||
4b58153d LP |
1172 | if (!sd_id128_is_null(u->invocation_id)) |
1173 | fprintf(f, "%s\tInvocation ID: " SD_ID128_FORMAT_STR "\n", | |
1174 | prefix, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
1175 | ||
49dbfa7b LP |
1176 | STRV_FOREACH(j, u->documentation) |
1177 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
1178 | ||
eeaedb7c LP |
1179 | following = unit_following(u); |
1180 | if (following) | |
ac155bb8 | 1181 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 1182 | |
eeaedb7c LP |
1183 | r = unit_following_set(u, &following_set); |
1184 | if (r >= 0) { | |
1185 | Unit *other; | |
1186 | ||
1187 | SET_FOREACH(other, following_set, i) | |
1188 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
1189 | } | |
1190 | ||
ac155bb8 MS |
1191 | if (u->fragment_path) |
1192 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 1193 | |
1b64d026 LP |
1194 | if (u->source_path) |
1195 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
1196 | ||
ae7a7182 | 1197 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 1198 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 1199 | |
e7dfbb4e LP |
1200 | if (u->failure_action != EMERGENCY_ACTION_NONE) |
1201 | fprintf(f, "%s\tFailure Action: %s\n", prefix, emergency_action_to_string(u->failure_action)); | |
1202 | if (u->success_action != EMERGENCY_ACTION_NONE) | |
1203 | fprintf(f, "%s\tSuccess Action: %s\n", prefix, emergency_action_to_string(u->success_action)); | |
1204 | ||
36c16a7c | 1205 | if (u->job_timeout != USEC_INFINITY) |
2fa4092c | 1206 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 1207 | |
87a47f99 LN |
1208 | if (u->job_timeout_action != EMERGENCY_ACTION_NONE) |
1209 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, emergency_action_to_string(u->job_timeout_action)); | |
f189ab18 LP |
1210 | |
1211 | if (u->job_timeout_reboot_arg) | |
1212 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
1213 | ||
59fccdc5 LP |
1214 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
1215 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 1216 | |
ac155bb8 | 1217 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
1218 | fprintf(f, |
1219 | "%s\tCondition Timestamp: %s\n" | |
1220 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
1221 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
1222 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 1223 | |
59fccdc5 LP |
1224 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
1225 | fprintf(f, | |
1226 | "%s\tAssert Timestamp: %s\n" | |
1227 | "%s\tAssert Result: %s\n", | |
1228 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
1229 | prefix, yes_no(u->assert_result)); | |
1230 | ||
87f0e418 | 1231 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
eef85c4a | 1232 | UnitDependencyInfo di; |
87f0e418 LP |
1233 | Unit *other; |
1234 | ||
eef85c4a LP |
1235 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { |
1236 | bool space = false; | |
1237 | ||
1238 | fprintf(f, "%s\t%s: %s (", prefix, unit_dependency_to_string(d), other->id); | |
1239 | ||
1240 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); | |
1241 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1242 | ||
1243 | fputs(")\n", f); | |
1244 | } | |
87f0e418 LP |
1245 | } |
1246 | ||
eef85c4a LP |
1247 | if (!hashmap_isempty(u->requires_mounts_for)) { |
1248 | UnitDependencyInfo di; | |
1249 | const char *path; | |
1250 | ||
1251 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { | |
1252 | bool space = false; | |
7c8fa05c | 1253 | |
eef85c4a | 1254 | fprintf(f, "%s\tRequiresMountsFor: %s (", prefix, path); |
7c8fa05c | 1255 | |
eef85c4a LP |
1256 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); |
1257 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1258 | ||
1259 | fputs(")\n", f); | |
1260 | } | |
7c8fa05c LP |
1261 | } |
1262 | ||
ac155bb8 | 1263 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 1264 | |
b0650475 | 1265 | fprintf(f, |
a40eb732 | 1266 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
1267 | "%s\tRefuseManualStart: %s\n" |
1268 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 1269 | "%s\tDefaultDependencies: %s\n" |
d420282b | 1270 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1271 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1272 | prefix, yes_no(u->stop_when_unneeded), |
1273 | prefix, yes_no(u->refuse_manual_start), | |
1274 | prefix, yes_no(u->refuse_manual_stop), | |
1275 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1276 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1277 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 1278 | |
23a177ef LP |
1279 | if (UNIT_VTABLE(u)->dump) |
1280 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1281 | |
ac155bb8 | 1282 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1283 | fprintf(f, |
1284 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1285 | prefix, u->merged_into->id); |
1286 | else if (u->load_state == UNIT_ERROR) | |
1287 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 1288 | |
05a98afd LP |
1289 | for (n = sd_bus_track_first(u->bus_track); n; n = sd_bus_track_next(u->bus_track)) |
1290 | fprintf(f, "%s\tBus Ref: %s\n", prefix, n); | |
87f0e418 | 1291 | |
ac155bb8 MS |
1292 | if (u->job) |
1293 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1294 | |
e0209d83 MS |
1295 | if (u->nop_job) |
1296 | job_dump(u->nop_job, f, prefix2); | |
87f0e418 LP |
1297 | } |
1298 | ||
1299 | /* Common implementation for multiple backends */ | |
e537352b | 1300 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1301 | int r; |
1302 | ||
1303 | assert(u); | |
23a177ef | 1304 | |
e48614c4 | 1305 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1306 | r = unit_load_fragment(u); |
1307 | if (r < 0) | |
23a177ef LP |
1308 | return r; |
1309 | ||
ac155bb8 | 1310 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1311 | return -ENOENT; |
1312 | ||
9e4ea9cc ZJS |
1313 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1314 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1315 | * been loaded and which not, at least without doing complicated book-keeping, | |
1316 | * so let's always reread all drop-ins. */ | |
1317 | return unit_load_dropin(unit_follow_merge(u)); | |
23a177ef LP |
1318 | } |
1319 | ||
1320 | /* Common implementation for multiple backends */ | |
e537352b | 1321 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1322 | int r; |
87f0e418 LP |
1323 | |
1324 | assert(u); | |
1325 | ||
23a177ef LP |
1326 | /* Same as unit_load_fragment_and_dropin(), but whether |
1327 | * something can be loaded or not doesn't matter. */ | |
1328 | ||
1329 | /* Load a .service file */ | |
4ad49000 LP |
1330 | r = unit_load_fragment(u); |
1331 | if (r < 0) | |
87f0e418 LP |
1332 | return r; |
1333 | ||
ac155bb8 MS |
1334 | if (u->load_state == UNIT_STUB) |
1335 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1336 | |
9e4ea9cc ZJS |
1337 | /* Load drop-in directory data */ |
1338 | return unit_load_dropin(unit_follow_merge(u)); | |
87f0e418 LP |
1339 | } |
1340 | ||
bba34eed | 1341 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1342 | assert(u); |
1343 | assert(target); | |
1344 | ||
ac155bb8 | 1345 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1346 | return 0; |
1347 | ||
35b8ca3a | 1348 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1349 | * that loop check below is reliable */ |
ac155bb8 MS |
1350 | if (u->load_state != UNIT_LOADED || |
1351 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1352 | return 0; |
1353 | ||
21256a2b LP |
1354 | /* If either side wants no automatic dependencies, then let's |
1355 | * skip this */ | |
ac155bb8 MS |
1356 | if (!u->default_dependencies || |
1357 | !target->default_dependencies) | |
21256a2b LP |
1358 | return 0; |
1359 | ||
98bc2000 | 1360 | /* Don't create loops */ |
eef85c4a | 1361 | if (hashmap_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1362 | return 0; |
1363 | ||
eef85c4a | 1364 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1365 | } |
1366 | ||
e954c9cf | 1367 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 1368 | |
21256a2b LP |
1369 | static const UnitDependency deps[] = { |
1370 | UNIT_REQUIRED_BY, | |
be7d9ff7 | 1371 | UNIT_REQUISITE_OF, |
21256a2b LP |
1372 | UNIT_WANTED_BY, |
1373 | UNIT_BOUND_BY | |
1374 | }; | |
1375 | ||
21256a2b | 1376 | unsigned k; |
db57f3c6 | 1377 | int r = 0; |
98bc2000 LP |
1378 | |
1379 | assert(u); | |
1380 | ||
eef85c4a LP |
1381 | for (k = 0; k < ELEMENTSOF(deps); k++) { |
1382 | Unit *target; | |
1383 | Iterator i; | |
1384 | void *v; | |
1385 | ||
1386 | HASHMAP_FOREACH_KEY(v, target, u->dependencies[deps[k]], i) { | |
a016b922 LP |
1387 | r = unit_add_default_target_dependency(u, target); |
1388 | if (r < 0) | |
21256a2b | 1389 | return r; |
a016b922 | 1390 | } |
eef85c4a | 1391 | } |
a016b922 | 1392 | |
e954c9cf LP |
1393 | return r; |
1394 | } | |
4ad49000 | 1395 | |
e954c9cf | 1396 | static int unit_add_slice_dependencies(Unit *u) { |
eef85c4a | 1397 | UnitDependencyMask mask; |
e954c9cf | 1398 | assert(u); |
b81884e7 | 1399 | |
35b7ff80 | 1400 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1401 | return 0; |
1402 | ||
eef85c4a LP |
1403 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1404 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1405 | relationship). */ | |
1406 | mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; | |
1407 | ||
e954c9cf | 1408 | if (UNIT_ISSET(u->slice)) |
eef85c4a | 1409 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true, mask); |
e954c9cf | 1410 | |
8c8da0e0 | 1411 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1412 | return 0; |
1413 | ||
eef85c4a | 1414 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, NULL, true, mask); |
98bc2000 LP |
1415 | } |
1416 | ||
e954c9cf | 1417 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1418 | UnitDependencyInfo di; |
1419 | const char *path; | |
1420 | Iterator i; | |
9588bc32 LP |
1421 | int r; |
1422 | ||
1423 | assert(u); | |
1424 | ||
eef85c4a LP |
1425 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { |
1426 | char prefix[strlen(path) + 1]; | |
9588bc32 | 1427 | |
eef85c4a | 1428 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1429 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1430 | Unit *m; |
1431 | ||
c7c89abb | 1432 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1433 | if (r < 0) |
1434 | return r; | |
c7c89abb FB |
1435 | |
1436 | m = manager_get_unit(u->manager, p); | |
1437 | if (!m) { | |
1438 | /* Make sure to load the mount unit if | |
1439 | * it exists. If so the dependencies | |
1440 | * on this unit will be added later | |
1441 | * during the loading of the mount | |
1442 | * unit. */ | |
1443 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1444 | continue; |
c7c89abb | 1445 | } |
9588bc32 LP |
1446 | if (m == u) |
1447 | continue; | |
1448 | ||
1449 | if (m->load_state != UNIT_LOADED) | |
1450 | continue; | |
1451 | ||
eef85c4a | 1452 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1453 | if (r < 0) |
1454 | return r; | |
1455 | ||
1456 | if (m->fragment_path) { | |
eef85c4a | 1457 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1458 | if (r < 0) |
1459 | return r; | |
1460 | } | |
1461 | } | |
1462 | } | |
1463 | ||
1464 | return 0; | |
1465 | } | |
1466 | ||
95ae05c0 WC |
1467 | static int unit_add_startup_units(Unit *u) { |
1468 | CGroupContext *c; | |
5269eb6b | 1469 | int r; |
95ae05c0 WC |
1470 | |
1471 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1472 | if (!c) |
1473 | return 0; | |
1474 | ||
d53d9474 | 1475 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1476 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1477 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1478 | return 0; |
1479 | ||
5269eb6b LP |
1480 | r = set_ensure_allocated(&u->manager->startup_units, NULL); |
1481 | if (r < 0) | |
1482 | return r; | |
1483 | ||
756c09e6 | 1484 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1485 | } |
1486 | ||
87f0e418 LP |
1487 | int unit_load(Unit *u) { |
1488 | int r; | |
1489 | ||
1490 | assert(u); | |
1491 | ||
ac155bb8 | 1492 | if (u->in_load_queue) { |
71fda00f | 1493 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1494 | u->in_load_queue = false; |
87f0e418 LP |
1495 | } |
1496 | ||
ac155bb8 | 1497 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1498 | return -EINVAL; |
1499 | ||
ac155bb8 | 1500 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1501 | return 0; |
1502 | ||
4f4afc88 LP |
1503 | if (u->transient_file) { |
1504 | r = fflush_and_check(u->transient_file); | |
1505 | if (r < 0) | |
1506 | goto fail; | |
1507 | ||
50fb00b7 | 1508 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1509 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1510 | } |
1511 | ||
c2756a68 LP |
1512 | if (UNIT_VTABLE(u)->load) { |
1513 | r = UNIT_VTABLE(u)->load(u); | |
1514 | if (r < 0) | |
87f0e418 | 1515 | goto fail; |
c2756a68 | 1516 | } |
23a177ef | 1517 | |
ac155bb8 | 1518 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1519 | r = -ENOENT; |
1520 | goto fail; | |
1521 | } | |
1522 | ||
7c8fa05c | 1523 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1524 | |
e954c9cf LP |
1525 | r = unit_add_target_dependencies(u); |
1526 | if (r < 0) | |
1527 | goto fail; | |
1528 | ||
1529 | r = unit_add_slice_dependencies(u); | |
1530 | if (r < 0) | |
1531 | goto fail; | |
c2756a68 | 1532 | |
e954c9cf | 1533 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1534 | if (r < 0) |
c2756a68 | 1535 | goto fail; |
7c8fa05c | 1536 | |
95ae05c0 WC |
1537 | r = unit_add_startup_units(u); |
1538 | if (r < 0) | |
1539 | goto fail; | |
1540 | ||
eef85c4a | 1541 | if (u->on_failure_job_mode == JOB_ISOLATE && hashmap_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1542 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
c2756a68 LP |
1543 | r = -EINVAL; |
1544 | goto fail; | |
1545 | } | |
bc432dc7 | 1546 | |
a2df3ea4 MK |
1547 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1548 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1549 | ||
bc432dc7 | 1550 | unit_update_cgroup_members_masks(u); |
f68319bb LP |
1551 | } |
1552 | ||
ac155bb8 | 1553 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1554 | |
1555 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1556 | unit_add_to_gc_queue(u); |
87f0e418 | 1557 | |
87f0e418 LP |
1558 | return 0; |
1559 | ||
1560 | fail: | |
c2756a68 | 1561 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1562 | u->load_error = r; |
c1e1601e | 1563 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1564 | unit_add_to_gc_queue(u); |
23a177ef | 1565 | |
f2341e0a | 1566 | log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
23a177ef | 1567 | |
87f0e418 LP |
1568 | return r; |
1569 | } | |
1570 | ||
49365733 LP |
1571 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1572 | Condition *c; | |
1573 | int triggered = -1; | |
1574 | ||
1575 | assert(u); | |
1576 | assert(to_string); | |
1577 | ||
1578 | /* If the condition list is empty, then it is true */ | |
1579 | if (!first) | |
1580 | return true; | |
1581 | ||
1582 | /* Otherwise, if all of the non-trigger conditions apply and | |
1583 | * if any of the trigger conditions apply (unless there are | |
1584 | * none) we return true */ | |
1585 | LIST_FOREACH(conditions, c, first) { | |
1586 | int r; | |
1587 | ||
1588 | r = condition_test(c); | |
1589 | if (r < 0) | |
f2341e0a LP |
1590 | log_unit_warning(u, |
1591 | "Couldn't determine result for %s=%s%s%s, assuming failed: %m", | |
49365733 LP |
1592 | to_string(c->type), |
1593 | c->trigger ? "|" : "", | |
1594 | c->negate ? "!" : "", | |
f2341e0a | 1595 | c->parameter); |
49365733 | 1596 | else |
f2341e0a LP |
1597 | log_unit_debug(u, |
1598 | "%s=%s%s%s %s.", | |
49365733 LP |
1599 | to_string(c->type), |
1600 | c->trigger ? "|" : "", | |
1601 | c->negate ? "!" : "", | |
1602 | c->parameter, | |
f2341e0a | 1603 | condition_result_to_string(c->result)); |
49365733 LP |
1604 | |
1605 | if (!c->trigger && r <= 0) | |
1606 | return false; | |
1607 | ||
1608 | if (c->trigger && triggered <= 0) | |
1609 | triggered = r > 0; | |
1610 | } | |
1611 | ||
1612 | return triggered != 0; | |
1613 | } | |
1614 | ||
9588bc32 | 1615 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1616 | assert(u); |
1617 | ||
ac155bb8 | 1618 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1619 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1620 | |
ac155bb8 | 1621 | return u->condition_result; |
90bbc946 LP |
1622 | } |
1623 | ||
59fccdc5 LP |
1624 | static bool unit_assert_test(Unit *u) { |
1625 | assert(u); | |
1626 | ||
1627 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1628 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1629 | |
1630 | return u->assert_result; | |
1631 | } | |
1632 | ||
df446f96 LP |
1633 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
1634 | DISABLE_WARNING_FORMAT_NONLITERAL; | |
1635 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, status, unit_status_msg_format, unit_description(u)); | |
1636 | REENABLE_WARNING; | |
1637 | } | |
1638 | ||
44a6b1b6 | 1639 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
877d54e9 | 1640 | const char *format; |
a85ca902 | 1641 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1642 | |
1643 | assert(u); | |
df446f96 | 1644 | assert(IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)); |
877d54e9 | 1645 | |
b5bf308b | 1646 | if (t != JOB_RELOAD) { |
a85ca902 MS |
1647 | format_table = &UNIT_VTABLE(u)->status_message_formats; |
1648 | if (format_table) { | |
1649 | format = format_table->starting_stopping[t == JOB_STOP]; | |
1650 | if (format) | |
1651 | return format; | |
1652 | } | |
1653 | } | |
877d54e9 LP |
1654 | |
1655 | /* Return generic strings */ | |
1656 | if (t == JOB_START) | |
1657 | return "Starting %s."; | |
1658 | else if (t == JOB_STOP) | |
1659 | return "Stopping %s."; | |
b5bf308b | 1660 | else |
877d54e9 | 1661 | return "Reloading %s."; |
877d54e9 LP |
1662 | } |
1663 | ||
1664 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1665 | const char *format; | |
1666 | ||
1667 | assert(u); | |
1668 | ||
df446f96 LP |
1669 | /* Reload status messages have traditionally not been printed to console. */ |
1670 | if (!IN_SET(t, JOB_START, JOB_STOP)) | |
1671 | return; | |
1672 | ||
877d54e9 | 1673 | format = unit_get_status_message_format(u, t); |
c6918296 | 1674 | |
bcfce235 | 1675 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1676 | unit_status_printf(u, "", format); |
bcfce235 | 1677 | REENABLE_WARNING; |
c6918296 MS |
1678 | } |
1679 | ||
877d54e9 | 1680 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
2b044526 | 1681 | const char *format, *mid; |
877d54e9 | 1682 | char buf[LINE_MAX]; |
877d54e9 LP |
1683 | |
1684 | assert(u); | |
1685 | ||
df446f96 | 1686 | if (!IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)) |
877d54e9 LP |
1687 | return; |
1688 | ||
81270860 LP |
1689 | if (log_on_console()) |
1690 | return; | |
1691 | ||
877d54e9 LP |
1692 | /* We log status messages for all units and all operations. */ |
1693 | ||
a85ca902 | 1694 | format = unit_get_status_message_format(u, t); |
877d54e9 | 1695 | |
bcfce235 | 1696 | DISABLE_WARNING_FORMAT_NONLITERAL; |
a7419dbc | 1697 | xsprintf(buf, format, unit_description(u)); |
bcfce235 | 1698 | REENABLE_WARNING; |
877d54e9 | 1699 | |
2b044526 ZJS |
1700 | mid = t == JOB_START ? "MESSAGE_ID=" SD_MESSAGE_UNIT_STARTING_STR : |
1701 | t == JOB_STOP ? "MESSAGE_ID=" SD_MESSAGE_UNIT_STOPPING_STR : | |
1702 | "MESSAGE_ID=" SD_MESSAGE_UNIT_RELOADING_STR; | |
877d54e9 | 1703 | |
f2341e0a LP |
1704 | /* Note that we deliberately use LOG_MESSAGE() instead of |
1705 | * LOG_UNIT_MESSAGE() here, since this is supposed to mimic | |
1706 | * closely what is written to screen using the status output, | |
1707 | * which is supposed the highest level, friendliest output | |
1708 | * possible, which means we should avoid the low-level unit | |
1709 | * name. */ | |
1710 | log_struct(LOG_INFO, | |
f2341e0a | 1711 | LOG_MESSAGE("%s", buf), |
ba360bb0 | 1712 | LOG_UNIT_ID(u), |
f1c50bec | 1713 | LOG_UNIT_INVOCATION_ID(u), |
ba360bb0 | 1714 | mid, |
f2341e0a | 1715 | NULL); |
877d54e9 | 1716 | } |
877d54e9 | 1717 | |
d1a34ae9 | 1718 | void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t) { |
df446f96 LP |
1719 | assert(u); |
1720 | assert(t >= 0); | |
1721 | assert(t < _JOB_TYPE_MAX); | |
d1a34ae9 MS |
1722 | |
1723 | unit_status_log_starting_stopping_reloading(u, t); | |
df446f96 | 1724 | unit_status_print_starting_stopping(u, t); |
d1a34ae9 MS |
1725 | } |
1726 | ||
07299350 | 1727 | int unit_start_limit_test(Unit *u) { |
6bf0f408 LP |
1728 | assert(u); |
1729 | ||
1730 | if (ratelimit_test(&u->start_limit)) { | |
1731 | u->start_limit_hit = false; | |
1732 | return 0; | |
1733 | } | |
1734 | ||
1735 | log_unit_warning(u, "Start request repeated too quickly."); | |
1736 | u->start_limit_hit = true; | |
1737 | ||
87a47f99 | 1738 | return emergency_action(u->manager, u->start_limit_action, u->reboot_arg, "unit failed"); |
6bf0f408 LP |
1739 | } |
1740 | ||
c891efaf | 1741 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1742 | assert(u); |
c891efaf FB |
1743 | |
1744 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1745 | return false; | |
1746 | ||
1747 | /* For some reasons units remaining in the same process group | |
1748 | * as PID 1 fail to acquire the console even if it's not used | |
1749 | * by any process. So skip the confirmation question for them. */ | |
1750 | return !unit_get_exec_context(u)->same_pgrp; | |
1751 | } | |
1752 | ||
631b676b LP |
1753 | static bool unit_verify_deps(Unit *u) { |
1754 | Unit *other; | |
1755 | Iterator j; | |
eef85c4a | 1756 | void *v; |
631b676b LP |
1757 | |
1758 | assert(u); | |
1759 | ||
1760 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with | |
1761 | * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job | |
1762 | * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in | |
1763 | * conjunction with After= as for them any such check would make things entirely racy. */ | |
1764 | ||
eef85c4a | 1765 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], j) { |
631b676b | 1766 | |
eef85c4a | 1767 | if (!hashmap_contains(u->dependencies[UNIT_AFTER], other)) |
631b676b LP |
1768 | continue; |
1769 | ||
1770 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1771 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1772 | return false; | |
1773 | } | |
1774 | } | |
1775 | ||
1776 | return true; | |
1777 | } | |
1778 | ||
87f0e418 | 1779 | /* Errors: |
6bf0f408 LP |
1780 | * -EBADR: This unit type does not support starting. |
1781 | * -EALREADY: Unit is already started. | |
1782 | * -EAGAIN: An operation is already in progress. Retry later. | |
1783 | * -ECANCELED: Too many requests for now. | |
1784 | * -EPROTO: Assert failed | |
1785 | * -EINVAL: Unit not loaded | |
1786 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1787 | * -ENOLINK: The necessary dependencies are not fulfilled. |
87f0e418 LP |
1788 | */ |
1789 | int unit_start(Unit *u) { | |
1790 | UnitActiveState state; | |
92ab323c | 1791 | Unit *following; |
87f0e418 LP |
1792 | |
1793 | assert(u); | |
1794 | ||
a82e5507 LP |
1795 | /* If this is already started, then this will succeed. Note |
1796 | * that this will even succeed if this unit is not startable | |
1797 | * by the user. This is relied on to detect when we need to | |
1798 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1799 | state = unit_active_state(u); |
1800 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1801 | return -EALREADY; | |
1802 | ||
6bf0f408 LP |
1803 | /* Units that aren't loaded cannot be started */ |
1804 | if (u->load_state != UNIT_LOADED) | |
1805 | return -EINVAL; | |
1806 | ||
a82e5507 LP |
1807 | /* If the conditions failed, don't do anything at all. If we |
1808 | * already are activating this call might still be useful to | |
1809 | * speed up activation in case there is some hold-off time, | |
1810 | * but we don't want to recheck the condition in that case. */ | |
1811 | if (state != UNIT_ACTIVATING && | |
1812 | !unit_condition_test(u)) { | |
f2341e0a | 1813 | log_unit_debug(u, "Starting requested but condition failed. Not starting unit."); |
52661efd LP |
1814 | return -EALREADY; |
1815 | } | |
1816 | ||
59fccdc5 LP |
1817 | /* If the asserts failed, fail the entire job */ |
1818 | if (state != UNIT_ACTIVATING && | |
1819 | !unit_assert_test(u)) { | |
f2341e0a | 1820 | log_unit_notice(u, "Starting requested but asserts failed."); |
59fccdc5 LP |
1821 | return -EPROTO; |
1822 | } | |
1823 | ||
d11a7645 LP |
1824 | /* Units of types that aren't supported cannot be |
1825 | * started. Note that we do this test only after the condition | |
1826 | * checks, so that we rather return condition check errors | |
1827 | * (which are usually not considered a true failure) than "not | |
1828 | * supported" errors (which are considered a failure). | |
1829 | */ | |
1830 | if (!unit_supported(u)) | |
1831 | return -EOPNOTSUPP; | |
1832 | ||
631b676b LP |
1833 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine should have |
1834 | * taken care of this already, but let's check this here again. After all, our dependencies might not be in | |
1835 | * effect anymore, due to a reload or due to a failed condition. */ | |
1836 | if (!unit_verify_deps(u)) | |
1837 | return -ENOLINK; | |
1838 | ||
92ab323c | 1839 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1840 | following = unit_following(u); |
1841 | if (following) { | |
f2341e0a | 1842 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1843 | return unit_start(following); |
1844 | } | |
1845 | ||
1846 | /* If it is stopped, but we cannot start it, then fail */ | |
1847 | if (!UNIT_VTABLE(u)->start) | |
1848 | return -EBADR; | |
1849 | ||
87f0e418 LP |
1850 | /* We don't suppress calls to ->start() here when we are |
1851 | * already starting, to allow this request to be used as a | |
1852 | * "hurry up" call, for example when the unit is in some "auto | |
1853 | * restart" state where it waits for a holdoff timer to elapse | |
1854 | * before it will start again. */ | |
1855 | ||
c1e1601e | 1856 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1857 | |
d1a34ae9 | 1858 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1859 | } |
1860 | ||
1861 | bool unit_can_start(Unit *u) { | |
1862 | assert(u); | |
1863 | ||
8ff4d2ab LP |
1864 | if (u->load_state != UNIT_LOADED) |
1865 | return false; | |
1866 | ||
1867 | if (!unit_supported(u)) | |
1868 | return false; | |
1869 | ||
87f0e418 LP |
1870 | return !!UNIT_VTABLE(u)->start; |
1871 | } | |
1872 | ||
2528a7a6 LP |
1873 | bool unit_can_isolate(Unit *u) { |
1874 | assert(u); | |
1875 | ||
1876 | return unit_can_start(u) && | |
ac155bb8 | 1877 | u->allow_isolate; |
2528a7a6 LP |
1878 | } |
1879 | ||
87f0e418 LP |
1880 | /* Errors: |
1881 | * -EBADR: This unit type does not support stopping. | |
1882 | * -EALREADY: Unit is already stopped. | |
1883 | * -EAGAIN: An operation is already in progress. Retry later. | |
1884 | */ | |
1885 | int unit_stop(Unit *u) { | |
1886 | UnitActiveState state; | |
92ab323c | 1887 | Unit *following; |
87f0e418 LP |
1888 | |
1889 | assert(u); | |
1890 | ||
87f0e418 | 1891 | state = unit_active_state(u); |
fdf20a31 | 1892 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1893 | return -EALREADY; |
1894 | ||
0faacd47 LP |
1895 | following = unit_following(u); |
1896 | if (following) { | |
f2341e0a | 1897 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1898 | return unit_stop(following); |
1899 | } | |
1900 | ||
7898b0cf LP |
1901 | if (!UNIT_VTABLE(u)->stop) |
1902 | return -EBADR; | |
1903 | ||
c1e1601e | 1904 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1905 | |
d1a34ae9 | 1906 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1907 | } |
1908 | ||
f5869324 LP |
1909 | bool unit_can_stop(Unit *u) { |
1910 | assert(u); | |
1911 | ||
1912 | if (!unit_supported(u)) | |
1913 | return false; | |
1914 | ||
1915 | if (u->perpetual) | |
1916 | return false; | |
1917 | ||
1918 | return !!UNIT_VTABLE(u)->stop; | |
1919 | } | |
1920 | ||
87f0e418 LP |
1921 | /* Errors: |
1922 | * -EBADR: This unit type does not support reloading. | |
1923 | * -ENOEXEC: Unit is not started. | |
1924 | * -EAGAIN: An operation is already in progress. Retry later. | |
1925 | */ | |
1926 | int unit_reload(Unit *u) { | |
1927 | UnitActiveState state; | |
92ab323c | 1928 | Unit *following; |
87f0e418 LP |
1929 | |
1930 | assert(u); | |
1931 | ||
ac155bb8 | 1932 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1933 | return -EINVAL; |
1934 | ||
87f0e418 LP |
1935 | if (!unit_can_reload(u)) |
1936 | return -EBADR; | |
1937 | ||
1938 | state = unit_active_state(u); | |
e364ad06 | 1939 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1940 | return -EALREADY; |
1941 | ||
6a371e23 | 1942 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1943 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1944 | return -ENOEXEC; |
6a371e23 | 1945 | } |
87f0e418 | 1946 | |
e48614c4 ZJS |
1947 | following = unit_following(u); |
1948 | if (following) { | |
f2341e0a | 1949 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1950 | return unit_reload(following); |
1951 | } | |
1952 | ||
c1e1601e | 1953 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1954 | |
f54bcca5 JR |
1955 | if (!UNIT_VTABLE(u)->reload) { |
1956 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
1957 | unit_notify(u, unit_active_state(u), unit_active_state(u), true); | |
1958 | return 0; | |
1959 | } | |
1960 | ||
d1a34ae9 | 1961 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1962 | } |
1963 | ||
1964 | bool unit_can_reload(Unit *u) { | |
1965 | assert(u); | |
1966 | ||
f54bcca5 JR |
1967 | if (UNIT_VTABLE(u)->can_reload) |
1968 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 1969 | |
eef85c4a | 1970 | if (!hashmap_isempty(u->dependencies[UNIT_PROPAGATES_RELOAD_TO])) |
87f0e418 LP |
1971 | return true; |
1972 | ||
f54bcca5 | 1973 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
1974 | } |
1975 | ||
b4a16b7b | 1976 | static void unit_check_unneeded(Unit *u) { |
be7d9ff7 | 1977 | |
4afd3348 | 1978 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
4bd29fe5 | 1979 | |
be7d9ff7 LP |
1980 | static const UnitDependency needed_dependencies[] = { |
1981 | UNIT_REQUIRED_BY, | |
084918ba | 1982 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1983 | UNIT_WANTED_BY, |
1984 | UNIT_BOUND_BY, | |
1985 | }; | |
1986 | ||
be7d9ff7 LP |
1987 | unsigned j; |
1988 | int r; | |
f3bff0eb LP |
1989 | |
1990 | assert(u); | |
1991 | ||
1992 | /* If this service shall be shut down when unneeded then do | |
1993 | * so. */ | |
1994 | ||
ac155bb8 | 1995 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1996 | return; |
1997 | ||
1998 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1999 | return; | |
2000 | ||
eef85c4a LP |
2001 | for (j = 0; j < ELEMENTSOF(needed_dependencies); j++) { |
2002 | Unit *other; | |
2003 | Iterator i; | |
2004 | void *v; | |
2005 | ||
2006 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[needed_dependencies[j]], i) | |
deb4e708 | 2007 | if (unit_active_or_pending(other) || unit_will_restart(other)) |
be7d9ff7 | 2008 | return; |
eef85c4a | 2009 | } |
b81884e7 | 2010 | |
595bfe7d | 2011 | /* If stopping a unit fails continuously we might enter a stop |
bea355da LP |
2012 | * loop here, hence stop acting on the service being |
2013 | * unnecessary after a while. */ | |
67bfdc97 | 2014 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { |
bea355da LP |
2015 | log_unit_warning(u, "Unit not needed anymore, but not stopping since we tried this too often recently."); |
2016 | return; | |
2017 | } | |
2018 | ||
f2341e0a | 2019 | log_unit_info(u, "Unit not needed anymore. Stopping."); |
f3bff0eb LP |
2020 | |
2021 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
4bd29fe5 | 2022 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
be7d9ff7 | 2023 | if (r < 0) |
4bd29fe5 | 2024 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
f3bff0eb LP |
2025 | } |
2026 | ||
ff502445 | 2027 | static void unit_check_binds_to(Unit *u) { |
4afd3348 | 2028 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
ff502445 LP |
2029 | bool stop = false; |
2030 | Unit *other; | |
2031 | Iterator i; | |
eef85c4a | 2032 | void *v; |
67bfdc97 | 2033 | int r; |
ff502445 LP |
2034 | |
2035 | assert(u); | |
2036 | ||
2037 | if (u->job) | |
2038 | return; | |
2039 | ||
2040 | if (unit_active_state(u) != UNIT_ACTIVE) | |
2041 | return; | |
2042 | ||
eef85c4a | 2043 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) { |
ff502445 LP |
2044 | if (other->job) |
2045 | continue; | |
13ddc3fc ZJS |
2046 | |
2047 | if (!other->coldplugged) | |
2048 | /* We might yet create a job for the other unit… */ | |
2049 | continue; | |
ff502445 LP |
2050 | |
2051 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
2052 | continue; | |
2053 | ||
2054 | stop = true; | |
98f738b6 | 2055 | break; |
ff502445 LP |
2056 | } |
2057 | ||
2058 | if (!stop) | |
2059 | return; | |
2060 | ||
595bfe7d | 2061 | /* If stopping a unit fails continuously we might enter a stop |
67bfdc97 LP |
2062 | * loop here, hence stop acting on the service being |
2063 | * unnecessary after a while. */ | |
2064 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { | |
2065 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); | |
2066 | return; | |
2067 | } | |
2068 | ||
98f738b6 | 2069 | assert(other); |
f2341e0a | 2070 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
2071 | |
2072 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
4bd29fe5 | 2073 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
67bfdc97 | 2074 | if (r < 0) |
4bd29fe5 | 2075 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
ff502445 LP |
2076 | } |
2077 | ||
87f0e418 LP |
2078 | static void retroactively_start_dependencies(Unit *u) { |
2079 | Iterator i; | |
2080 | Unit *other; | |
eef85c4a | 2081 | void *v; |
87f0e418 LP |
2082 | |
2083 | assert(u); | |
2084 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2085 | ||
eef85c4a LP |
2086 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUIRES], i) |
2087 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2088 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2089 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
b81884e7 | 2090 | |
eef85c4a LP |
2091 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) |
2092 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2093 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2094 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
87f0e418 | 2095 | |
eef85c4a LP |
2096 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_WANTS], i) |
2097 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2098 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2099 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL); |
87f0e418 | 2100 | |
eef85c4a | 2101 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 2102 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2103 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
69dd2852 | 2104 | |
eef85c4a | 2105 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 2106 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2107 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
87f0e418 LP |
2108 | } |
2109 | ||
2110 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 | 2111 | Unit *other; |
eef85c4a LP |
2112 | Iterator i; |
2113 | void *v; | |
87f0e418 LP |
2114 | |
2115 | assert(u); | |
2116 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2117 | ||
b81884e7 | 2118 | /* Pull down units which are bound to us recursively if enabled */ |
eef85c4a | 2119 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 2120 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2121 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
cd0504d0 MS |
2122 | } |
2123 | ||
2124 | static void check_unneeded_dependencies(Unit *u) { | |
cd0504d0 | 2125 | Unit *other; |
eef85c4a LP |
2126 | Iterator i; |
2127 | void *v; | |
cd0504d0 MS |
2128 | |
2129 | assert(u); | |
2130 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
2131 | |
2132 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
eef85c4a | 2133 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 2134 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 2135 | unit_check_unneeded(other); |
eef85c4a | 2136 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 2137 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 2138 | unit_check_unneeded(other); |
eef85c4a | 2139 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 2140 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 2141 | unit_check_unneeded(other); |
eef85c4a | 2142 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
2143 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
2144 | unit_check_unneeded(other); | |
87f0e418 LP |
2145 | } |
2146 | ||
3ecaa09b | 2147 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
2148 | Unit *other; |
2149 | Iterator i; | |
eef85c4a | 2150 | void *v; |
c0daa706 LP |
2151 | |
2152 | assert(u); | |
2153 | ||
eef85c4a | 2154 | if (hashmap_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
2155 | return; |
2156 | ||
f2341e0a | 2157 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 2158 | |
eef85c4a | 2159 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
2160 | int r; |
2161 | ||
4bd29fe5 | 2162 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, NULL, NULL); |
c1b6628d | 2163 | if (r < 0) |
f2341e0a | 2164 | log_unit_error_errno(u, r, "Failed to enqueue OnFailure= job: %m"); |
222ae6a8 | 2165 | } |
c0daa706 LP |
2166 | } |
2167 | ||
3ecaa09b LP |
2168 | void unit_trigger_notify(Unit *u) { |
2169 | Unit *other; | |
2170 | Iterator i; | |
eef85c4a | 2171 | void *v; |
3ecaa09b LP |
2172 | |
2173 | assert(u); | |
2174 | ||
eef85c4a | 2175 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_TRIGGERED_BY], i) |
3ecaa09b LP |
2176 | if (UNIT_VTABLE(other)->trigger_notify) |
2177 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2178 | } | |
2179 | ||
915b1d01 LP |
2180 | static int unit_log_resources(Unit *u) { |
2181 | ||
2182 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + 4]; | |
2183 | size_t n_message_parts = 0, n_iovec = 0; | |
2184 | char* message_parts[3 + 1], *t; | |
2185 | nsec_t nsec = NSEC_INFINITY; | |
2186 | CGroupIPAccountingMetric m; | |
2187 | size_t i; | |
2188 | int r; | |
2189 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2190 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2191 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2192 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2193 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2194 | }; | |
2195 | ||
2196 | assert(u); | |
2197 | ||
2198 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2199 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2200 | * information and the complete data in structured fields. */ | |
2201 | ||
2202 | (void) unit_get_cpu_usage(u, &nsec); | |
2203 | if (nsec != NSEC_INFINITY) { | |
2204 | char buf[FORMAT_TIMESPAN_MAX] = ""; | |
2205 | ||
2206 | /* Format the CPU time for inclusion in the structured log message */ | |
2207 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2208 | r = log_oom(); | |
2209 | goto finish; | |
2210 | } | |
2211 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2212 | ||
2213 | /* Format the CPU time for inclusion in the human language message string */ | |
2214 | format_timespan(buf, sizeof(buf), nsec / NSEC_PER_USEC, USEC_PER_MSEC); | |
2215 | t = strjoin(n_message_parts > 0 ? "consumed " : "Consumed ", buf, " CPU time"); | |
2216 | if (!t) { | |
2217 | r = log_oom(); | |
2218 | goto finish; | |
2219 | } | |
2220 | ||
2221 | message_parts[n_message_parts++] = t; | |
2222 | } | |
2223 | ||
2224 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { | |
2225 | char buf[FORMAT_BYTES_MAX] = ""; | |
2226 | uint64_t value = UINT64_MAX; | |
2227 | ||
2228 | assert(ip_fields[m]); | |
2229 | ||
2230 | (void) unit_get_ip_accounting(u, m, &value); | |
2231 | if (value == UINT64_MAX) | |
2232 | continue; | |
2233 | ||
2234 | /* Format IP accounting data for inclusion in the structured log message */ | |
2235 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2236 | r = log_oom(); | |
2237 | goto finish; | |
2238 | } | |
2239 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2240 | ||
2241 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2242 | * bytes counters (and not for the packets counters) */ | |
2243 | if (m == CGROUP_IP_INGRESS_BYTES) | |
2244 | t = strjoin(n_message_parts > 0 ? "received " : "Received ", | |
2245 | format_bytes(buf, sizeof(buf), value), | |
2246 | " IP traffic"); | |
2247 | else if (m == CGROUP_IP_EGRESS_BYTES) | |
2248 | t = strjoin(n_message_parts > 0 ? "sent " : "Sent ", | |
2249 | format_bytes(buf, sizeof(buf), value), | |
2250 | " IP traffic"); | |
2251 | else | |
2252 | continue; | |
2253 | if (!t) { | |
2254 | r = log_oom(); | |
2255 | goto finish; | |
2256 | } | |
2257 | ||
2258 | message_parts[n_message_parts++] = t; | |
2259 | } | |
2260 | ||
2261 | /* Is there any accounting data available at all? */ | |
2262 | if (n_iovec == 0) { | |
2263 | r = 0; | |
2264 | goto finish; | |
2265 | } | |
2266 | ||
2267 | if (n_message_parts == 0) | |
2268 | t = strjoina("MESSAGE=", u->id, ": Completed"); | |
2269 | else { | |
2270 | _cleanup_free_ char *joined; | |
2271 | ||
2272 | message_parts[n_message_parts] = NULL; | |
2273 | ||
2274 | joined = strv_join(message_parts, ", "); | |
2275 | if (!joined) { | |
2276 | r = log_oom(); | |
2277 | goto finish; | |
2278 | } | |
2279 | ||
2280 | t = strjoina("MESSAGE=", u->id, ": ", joined); | |
2281 | } | |
2282 | ||
2283 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2284 | * and hence don't increase n_iovec for them */ | |
2285 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2286 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2287 | ||
2288 | t = strjoina(u->manager->unit_log_field, u->id); | |
2289 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2290 | ||
2291 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2292 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2293 | ||
2294 | log_struct_iovec(LOG_INFO, iovec, n_iovec + 4); | |
2295 | r = 0; | |
2296 | ||
2297 | finish: | |
2298 | for (i = 0; i < n_message_parts; i++) | |
2299 | free(message_parts[i]); | |
2300 | ||
2301 | for (i = 0; i < n_iovec; i++) | |
2302 | free(iovec[i].iov_base); | |
2303 | ||
2304 | return r; | |
2305 | ||
2306 | } | |
2307 | ||
e2f3b44c | 2308 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 2309 | Manager *m; |
7e6e7b06 | 2310 | bool unexpected; |
a096ed36 | 2311 | |
87f0e418 LP |
2312 | assert(u); |
2313 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2314 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2315 | |
8e471ccd LP |
2316 | /* Note that this is called for all low-level state changes, |
2317 | * even if they might map to the same high-level | |
865cc19a | 2318 | * UnitActiveState! That means that ns == os is an expected |
c5315881 | 2319 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 2320 | * this function will be called too! */ |
87f0e418 | 2321 | |
546ac4f0 MS |
2322 | m = u->manager; |
2323 | ||
f755e3b7 | 2324 | /* Update timestamps for state changes */ |
2c289ea8 | 2325 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2326 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2327 | |
bdbf9951 | 2328 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2329 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2330 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2331 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2332 | |
2333 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2334 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2335 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2336 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2337 | } |
87f0e418 | 2338 | |
865cc19a | 2339 | /* Keep track of failed units */ |
5269eb6b | 2340 | (void) manager_update_failed_units(u->manager, u, ns == UNIT_FAILED); |
f755e3b7 | 2341 | |
d3070fbd LP |
2342 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2343 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
efdb0237 | 2344 | unit_prune_cgroup(u); |
d3070fbd LP |
2345 | unit_unlink_state_files(u); |
2346 | } | |
fb385181 | 2347 | |
9cd86184 | 2348 | /* Note that this doesn't apply to RemainAfterExit services exiting |
6f285378 | 2349 | * successfully, since there's no change of state in that case. Which is |
9cd86184 | 2350 | * why it is handled in service_set_state() */ |
7ed9f6cd | 2351 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
2352 | ExecContext *ec; |
2353 | ||
2354 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 2355 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 | 2356 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
313cefa1 | 2357 | m->n_on_console--; |
31a7eb86 ZJS |
2358 | |
2359 | if (m->n_on_console == 0) | |
2360 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 2361 | m->no_console_output = false; |
31a7eb86 | 2362 | } else |
313cefa1 | 2363 | m->n_on_console++; |
7ed9f6cd MS |
2364 | } |
2365 | } | |
2366 | ||
ac155bb8 | 2367 | if (u->job) { |
7e6e7b06 | 2368 | unexpected = false; |
87f0e418 | 2369 | |
ac155bb8 | 2370 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
2371 | |
2372 | /* So we reached a different state for this | |
2373 | * job. Let's see if we can run it now if it | |
2374 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 2375 | job_add_to_run_queue(u->job); |
87f0e418 | 2376 | |
b410e6b9 | 2377 | /* Let's check whether this state change constitutes a |
35b8ca3a | 2378 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 2379 | * hence needs to invalidate jobs. */ |
87f0e418 | 2380 | |
ac155bb8 | 2381 | switch (u->job->type) { |
87f0e418 | 2382 | |
b410e6b9 LP |
2383 | case JOB_START: |
2384 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 2385 | |
b410e6b9 | 2386 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
833f92ad | 2387 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 2388 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 2389 | unexpected = true; |
41b02ec7 | 2390 | |
fdf20a31 | 2391 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2392 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
b410e6b9 | 2393 | } |
87f0e418 | 2394 | |
b410e6b9 | 2395 | break; |
87f0e418 | 2396 | |
b410e6b9 LP |
2397 | case JOB_RELOAD: |
2398 | case JOB_RELOAD_OR_START: | |
3282591d | 2399 | case JOB_TRY_RELOAD: |
87f0e418 | 2400 | |
ac155bb8 | 2401 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 2402 | if (ns == UNIT_ACTIVE) |
833f92ad | 2403 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true, false); |
ec2ce0c5 | 2404 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { |
a096ed36 | 2405 | unexpected = true; |
41b02ec7 | 2406 | |
fdf20a31 | 2407 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2408 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
a096ed36 | 2409 | } |
b410e6b9 | 2410 | } |
87f0e418 | 2411 | |
b410e6b9 | 2412 | break; |
87f0e418 | 2413 | |
b410e6b9 LP |
2414 | case JOB_STOP: |
2415 | case JOB_RESTART: | |
2416 | case JOB_TRY_RESTART: | |
87f0e418 | 2417 | |
fdf20a31 | 2418 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2419 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 2420 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 2421 | unexpected = true; |
833f92ad | 2422 | job_finish_and_invalidate(u->job, JOB_FAILED, true, false); |
b410e6b9 | 2423 | } |
87f0e418 | 2424 | |
b410e6b9 | 2425 | break; |
87f0e418 | 2426 | |
b410e6b9 LP |
2427 | default: |
2428 | assert_not_reached("Job type unknown"); | |
87f0e418 | 2429 | } |
87f0e418 | 2430 | |
7e6e7b06 LP |
2431 | } else |
2432 | unexpected = true; | |
2433 | ||
2c289ea8 | 2434 | if (!MANAGER_IS_RELOADING(m)) { |
f3bff0eb | 2435 | |
bdbf9951 LP |
2436 | /* If this state change happened without being |
2437 | * requested by a job, then let's retroactively start | |
2438 | * or stop dependencies. We skip that step when | |
2439 | * deserializing, since we don't want to create any | |
2440 | * additional jobs just because something is already | |
2441 | * activated. */ | |
2442 | ||
2443 | if (unexpected) { | |
2444 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2445 | retroactively_start_dependencies(u); | |
2446 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2447 | retroactively_stop_dependencies(u); | |
2448 | } | |
5de9682c | 2449 | |
cd0504d0 | 2450 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 2451 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
2452 | check_unneeded_dependencies(u); |
2453 | ||
bdbf9951 | 2454 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2455 | log_unit_debug(u, "Unit entered failed state."); |
3ecaa09b | 2456 | unit_start_on_failure(u); |
cd6d0a45 | 2457 | } |
3b2775c5 | 2458 | } |
e537352b | 2459 | |
3b2775c5 LP |
2460 | /* Some names are special */ |
2461 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
2462 | ||
2463 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
865cc19a | 2464 | /* The bus might have just become available, |
3b2775c5 LP |
2465 | * hence try to connect to it, if we aren't |
2466 | * yet connected. */ | |
546ac4f0 | 2467 | bus_init(m, true); |
3b2775c5 | 2468 | |
ac155bb8 | 2469 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 2470 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
2c289ea8 | 2471 | !MANAGER_IS_RELOADING(m)) { |
3b2775c5 | 2472 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 2473 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 2474 | u->in_audit = true; |
3b2775c5 | 2475 | } |
e983b760 | 2476 | |
3b2775c5 | 2477 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 2478 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 2479 | |
3b2775c5 | 2480 | } else { |
915b1d01 LP |
2481 | /* We don't care about D-Bus going down here, since we'll get an asynchronous notification for it |
2482 | * anyway. */ | |
bdbf9951 | 2483 | |
915b1d01 LP |
2484 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && |
2485 | !UNIT_IS_INACTIVE_OR_FAILED(os) | |
2486 | && !MANAGER_IS_RELOADING(m)) { | |
cd6d0a45 | 2487 | |
915b1d01 LP |
2488 | /* This unit just stopped/failed. */ |
2489 | if (u->type == UNIT_SERVICE) { | |
4927fcae | 2490 | |
915b1d01 LP |
2491 | /* Hmm, if there was no start record written |
2492 | * write it now, so that we always have a nice | |
2493 | * pair */ | |
2494 | if (!u->in_audit) { | |
2495 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); | |
cd6d0a45 | 2496 | |
915b1d01 LP |
2497 | if (ns == UNIT_INACTIVE) |
2498 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); | |
2499 | } else | |
2500 | /* Write audit record if we have just finished shutting down */ | |
2501 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); | |
2502 | ||
2503 | u->in_audit = false; | |
2504 | } | |
bdbf9951 | 2505 | |
915b1d01 LP |
2506 | /* Write a log message about consumed resources */ |
2507 | unit_log_resources(u); | |
cd6d0a45 | 2508 | } |
f278026d LP |
2509 | } |
2510 | ||
546ac4f0 | 2511 | manager_recheck_journal(m); |
3ecaa09b | 2512 | unit_trigger_notify(u); |
3b2775c5 | 2513 | |
2c289ea8 | 2514 | if (!MANAGER_IS_RELOADING(u->manager)) { |
ff502445 LP |
2515 | /* Maybe we finished startup and are now ready for |
2516 | * being stopped because unneeded? */ | |
bf6dcfa6 | 2517 | unit_check_unneeded(u); |
c1e1601e | 2518 | |
ff502445 LP |
2519 | /* Maybe we finished startup, but something we needed |
2520 | * has vanished? Let's die then. (This happens when | |
2521 | * something BindsTo= to a Type=oneshot unit, as these | |
2522 | * units go directly from starting to inactive, | |
2523 | * without ever entering started.) */ | |
2524 | unit_check_binds_to(u); | |
53c35a76 LP |
2525 | |
2526 | if (os != UNIT_FAILED && ns == UNIT_FAILED) | |
2527 | (void) emergency_action(u->manager, u->failure_action, u->reboot_arg, "unit failed"); | |
e7dfbb4e LP |
2528 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) |
2529 | (void) emergency_action(u->manager, u->success_action, u->reboot_arg, "unit succeeded"); | |
ff502445 LP |
2530 | } |
2531 | ||
c1e1601e | 2532 | unit_add_to_dbus_queue(u); |
701cc384 | 2533 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2534 | } |
2535 | ||
87f0e418 | 2536 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
2537 | int q, r; |
2538 | ||
87f0e418 LP |
2539 | assert(u); |
2540 | assert(pid >= 1); | |
2541 | ||
5ba6985b LP |
2542 | /* Watch a specific PID. We only support one or two units |
2543 | * watching each PID for now, not more. */ | |
2544 | ||
d5099efc | 2545 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2546 | if (r < 0) |
2547 | return r; | |
2548 | ||
d5099efc | 2549 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL); |
a911bb9a LP |
2550 | if (r < 0) |
2551 | return r; | |
2552 | ||
fea72cc0 | 2553 | r = hashmap_put(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
5ba6985b | 2554 | if (r == -EEXIST) { |
d5099efc | 2555 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL); |
5ba6985b LP |
2556 | if (r < 0) |
2557 | return r; | |
05e343b7 | 2558 | |
fea72cc0 | 2559 | r = hashmap_put(u->manager->watch_pids2, PID_TO_PTR(pid), u); |
5ba6985b | 2560 | } |
a911bb9a | 2561 | |
fea72cc0 | 2562 | q = set_put(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2563 | if (q < 0) |
2564 | return q; | |
2565 | ||
2566 | return r; | |
87f0e418 LP |
2567 | } |
2568 | ||
2569 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
2570 | assert(u); | |
2571 | assert(pid >= 1); | |
2572 | ||
fea72cc0 LP |
2573 | (void) hashmap_remove_value(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
2574 | (void) hashmap_remove_value(u->manager->watch_pids2, PID_TO_PTR(pid), u); | |
2575 | (void) set_remove(u->pids, PID_TO_PTR(pid)); | |
a911bb9a LP |
2576 | } |
2577 | ||
bd44e61b LP |
2578 | void unit_unwatch_all_pids(Unit *u) { |
2579 | assert(u); | |
2580 | ||
2581 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2582 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2583 | |
efdb0237 | 2584 | u->pids = set_free(u->pids); |
a911bb9a LP |
2585 | } |
2586 | ||
2587 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2588 | Iterator i; | |
2589 | void *e; | |
2590 | ||
2591 | assert(u); | |
2592 | ||
2593 | /* Cleans dead PIDs from our list */ | |
2594 | ||
2595 | SET_FOREACH(e, u->pids, i) { | |
fea72cc0 | 2596 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2597 | |
2598 | if (pid == except1 || pid == except2) | |
2599 | continue; | |
2600 | ||
9f5650ae | 2601 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2602 | unit_unwatch_pid(u, pid); |
a911bb9a | 2603 | } |
87f0e418 LP |
2604 | } |
2605 | ||
87f0e418 LP |
2606 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2607 | assert(u); | |
2608 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2609 | ||
2610 | switch (j) { | |
2611 | ||
2612 | case JOB_VERIFY_ACTIVE: | |
2613 | case JOB_START: | |
e0209d83 | 2614 | case JOB_NOP: |
f5869324 LP |
2615 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
2616 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueing | |
2617 | * jobs for it. */ | |
87f0e418 LP |
2618 | return true; |
2619 | ||
f5869324 LP |
2620 | case JOB_STOP: |
2621 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
2622 | * external events), hence it makes no sense to permit enqueing such a request either. */ | |
2623 | return !u->perpetual; | |
2624 | ||
87f0e418 LP |
2625 | case JOB_RESTART: |
2626 | case JOB_TRY_RESTART: | |
f5869324 | 2627 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
2628 | |
2629 | case JOB_RELOAD: | |
3282591d | 2630 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2631 | return unit_can_reload(u); |
2632 | ||
2633 | case JOB_RELOAD_OR_START: | |
2634 | return unit_can_reload(u) && unit_can_start(u); | |
2635 | ||
2636 | default: | |
2637 | assert_not_reached("Invalid job type"); | |
2638 | } | |
2639 | } | |
2640 | ||
f2341e0a LP |
2641 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2642 | assert(u); | |
d1fab3fe | 2643 | |
f2341e0a LP |
2644 | /* Only warn about some unit types */ |
2645 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2646 | return; | |
3f3cc397 | 2647 | |
f2341e0a LP |
2648 | if (streq_ptr(u->id, other)) |
2649 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2650 | else | |
2651 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2652 | } |
2653 | ||
eef85c4a LP |
2654 | static int unit_add_dependency_hashmap( |
2655 | Hashmap **h, | |
2656 | Unit *other, | |
2657 | UnitDependencyMask origin_mask, | |
2658 | UnitDependencyMask destination_mask) { | |
2659 | ||
2660 | UnitDependencyInfo info; | |
2661 | int r; | |
2662 | ||
2663 | assert(h); | |
2664 | assert(other); | |
2665 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2666 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2667 | assert(origin_mask > 0 || destination_mask > 0); | |
2668 | ||
2669 | r = hashmap_ensure_allocated(h, NULL); | |
2670 | if (r < 0) | |
2671 | return r; | |
2672 | ||
2673 | assert_cc(sizeof(void*) == sizeof(info)); | |
2674 | ||
2675 | info.data = hashmap_get(*h, other); | |
2676 | if (info.data) { | |
2677 | /* Entry already exists. Add in our mask. */ | |
2678 | ||
2679 | if ((info.origin_mask & origin_mask) == info.origin_mask && | |
2680 | (info.destination_mask & destination_mask) == info.destination_mask) | |
2681 | return 0; /* NOP */ | |
2682 | ||
2683 | info.origin_mask |= origin_mask; | |
2684 | info.destination_mask |= destination_mask; | |
2685 | ||
2686 | r = hashmap_update(*h, other, info.data); | |
2687 | } else { | |
2688 | info = (UnitDependencyInfo) { | |
2689 | .origin_mask = origin_mask, | |
2690 | .destination_mask = destination_mask, | |
2691 | }; | |
2692 | ||
2693 | r = hashmap_put(*h, other, info.data); | |
2694 | } | |
2695 | if (r < 0) | |
2696 | return r; | |
2697 | ||
2698 | return 1; | |
2699 | } | |
2700 | ||
2701 | int unit_add_dependency( | |
2702 | Unit *u, | |
2703 | UnitDependency d, | |
2704 | Unit *other, | |
2705 | bool add_reference, | |
2706 | UnitDependencyMask mask) { | |
87f0e418 LP |
2707 | |
2708 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2709 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 2710 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 2711 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 2712 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2713 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 2714 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 2715 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 2716 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 2717 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2718 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2719 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2720 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2721 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2722 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2723 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2724 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2725 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2726 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2727 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2728 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2729 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2730 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2731 | }; |
eef85c4a LP |
2732 | Unit *original_u = u, *original_other = other; |
2733 | int r; | |
87f0e418 LP |
2734 | |
2735 | assert(u); | |
2736 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2737 | assert(other); |
2738 | ||
9f151f29 LP |
2739 | u = unit_follow_merge(u); |
2740 | other = unit_follow_merge(other); | |
2741 | ||
87f0e418 LP |
2742 | /* We won't allow dependencies on ourselves. We will not |
2743 | * consider them an error however. */ | |
d1fab3fe | 2744 | if (u == other) { |
eef85c4a | 2745 | maybe_warn_about_dependency(original_u, original_other->id, d); |
87f0e418 | 2746 | return 0; |
d1fab3fe | 2747 | } |
87f0e418 | 2748 | |
eef85c4a LP |
2749 | if ((d == UNIT_BEFORE && other->type == UNIT_DEVICE) || |
2750 | (d == UNIT_AFTER && u->type == UNIT_DEVICE)) { | |
dd5e7000 ZJS |
2751 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
2752 | return 0; | |
2753 | } | |
2754 | ||
eef85c4a | 2755 | r = unit_add_dependency_hashmap(u->dependencies + d, other, mask, 0); |
613b411c | 2756 | if (r < 0) |
87f0e418 LP |
2757 | return r; |
2758 | ||
eef85c4a LP |
2759 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2760 | r = unit_add_dependency_hashmap(other->dependencies + inverse_table[d], u, 0, mask); | |
613b411c LP |
2761 | if (r < 0) |
2762 | return r; | |
2763 | } | |
2764 | ||
2765 | if (add_reference) { | |
eef85c4a | 2766 | r = unit_add_dependency_hashmap(u->dependencies + UNIT_REFERENCES, other, mask, 0); |
613b411c | 2767 | if (r < 0) |
5de9682c LP |
2768 | return r; |
2769 | ||
eef85c4a | 2770 | r = unit_add_dependency_hashmap(other->dependencies + UNIT_REFERENCED_BY, u, 0, mask); |
613b411c | 2771 | if (r < 0) |
701cc384 | 2772 | return r; |
613b411c | 2773 | } |
87f0e418 | 2774 | |
c1e1601e | 2775 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
2776 | return 0; |
2777 | } | |
0301abf4 | 2778 | |
eef85c4a | 2779 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
2c966c03 LP |
2780 | int r; |
2781 | ||
2782 | assert(u); | |
2783 | ||
eef85c4a | 2784 | r = unit_add_dependency(u, d, other, add_reference, mask); |
3f3cc397 | 2785 | if (r < 0) |
2c966c03 LP |
2786 | return r; |
2787 | ||
eef85c4a | 2788 | return unit_add_dependency(u, e, other, add_reference, mask); |
2c966c03 LP |
2789 | } |
2790 | ||
7410616c LP |
2791 | static int resolve_template(Unit *u, const char *name, const char*path, char **buf, const char **ret) { |
2792 | int r; | |
9e2f7c11 LP |
2793 | |
2794 | assert(u); | |
2795 | assert(name || path); | |
7410616c LP |
2796 | assert(buf); |
2797 | assert(ret); | |
9e2f7c11 LP |
2798 | |
2799 | if (!name) | |
2b6bf07d | 2800 | name = basename(path); |
9e2f7c11 | 2801 | |
7410616c LP |
2802 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2803 | *buf = NULL; | |
2804 | *ret = name; | |
2805 | return 0; | |
9e2f7c11 LP |
2806 | } |
2807 | ||
ac155bb8 | 2808 | if (u->instance) |
7410616c | 2809 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 2810 | else { |
ae018d9b | 2811 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2812 | |
7410616c LP |
2813 | r = unit_name_to_prefix(u->id, &i); |
2814 | if (r < 0) | |
2815 | return r; | |
9e2f7c11 | 2816 | |
7410616c | 2817 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 2818 | } |
7410616c LP |
2819 | if (r < 0) |
2820 | return r; | |
9e2f7c11 | 2821 | |
7410616c LP |
2822 | *ret = *buf; |
2823 | return 0; | |
9e2f7c11 LP |
2824 | } |
2825 | ||
eef85c4a | 2826 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference, UnitDependencyMask mask) { |
7410616c | 2827 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
2828 | Unit *other; |
2829 | int r; | |
2830 | ||
9e2f7c11 LP |
2831 | assert(u); |
2832 | assert(name || path); | |
09b6b09f | 2833 | |
7410616c LP |
2834 | r = resolve_template(u, name, path, &buf, &name); |
2835 | if (r < 0) | |
2836 | return r; | |
09b6b09f | 2837 | |
8afbb8e1 LP |
2838 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2839 | if (r < 0) | |
2840 | return r; | |
9e2f7c11 | 2841 | |
eef85c4a | 2842 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
2843 | } |
2844 | ||
eef85c4a | 2845 | 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 | 2846 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2847 | Unit *other; |
2848 | int r; | |
2c966c03 LP |
2849 | |
2850 | assert(u); | |
2851 | assert(name || path); | |
2852 | ||
7410616c LP |
2853 | r = resolve_template(u, name, path, &buf, &name); |
2854 | if (r < 0) | |
2855 | return r; | |
2c966c03 | 2856 | |
3f3cc397 LP |
2857 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2858 | if (r < 0) | |
68eda4bd | 2859 | return r; |
2c966c03 | 2860 | |
eef85c4a | 2861 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
2862 | } |
2863 | ||
0301abf4 | 2864 | int set_unit_path(const char *p) { |
0301abf4 | 2865 | /* This is mostly for debug purposes */ |
cbe46ead | 2866 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 2867 | return -errno; |
0301abf4 LP |
2868 | |
2869 | return 0; | |
2870 | } | |
88066b3a | 2871 | |
ea430986 | 2872 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2873 | assert(u); |
2874 | ||
ac155bb8 | 2875 | if (!u->id) |
04ade7d2 LP |
2876 | return NULL; |
2877 | ||
48899192 | 2878 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2879 | } |
2880 | ||
4b58153d LP |
2881 | char *unit_dbus_path_invocation_id(Unit *u) { |
2882 | assert(u); | |
2883 | ||
2884 | if (sd_id128_is_null(u->invocation_id)) | |
2885 | return NULL; | |
2886 | ||
2887 | return unit_dbus_path_from_name(u->invocation_id_string); | |
2888 | } | |
2889 | ||
d79200e2 LP |
2890 | int unit_set_slice(Unit *u, Unit *slice) { |
2891 | assert(u); | |
2892 | assert(slice); | |
2893 | ||
2894 | /* Sets the unit slice if it has not been set before. Is extra | |
2895 | * careful, to only allow this for units that actually have a | |
2896 | * cgroup context. Also, we don't allow to set this for slices | |
2897 | * (since the parent slice is derived from the name). Make | |
2898 | * sure the unit we set is actually a slice. */ | |
2899 | ||
2900 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
2901 | return -EOPNOTSUPP; | |
2902 | ||
2903 | if (u->type == UNIT_SLICE) | |
2904 | return -EINVAL; | |
2905 | ||
102ef982 LP |
2906 | if (unit_active_state(u) != UNIT_INACTIVE) |
2907 | return -EBUSY; | |
2908 | ||
d79200e2 LP |
2909 | if (slice->type != UNIT_SLICE) |
2910 | return -EINVAL; | |
2911 | ||
efdb0237 LP |
2912 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
2913 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
2914 | return -EPERM; | |
2915 | ||
d79200e2 LP |
2916 | if (UNIT_DEREF(u->slice) == slice) |
2917 | return 0; | |
2918 | ||
99e66921 TH |
2919 | /* Disallow slice changes if @u is already bound to cgroups */ |
2920 | if (UNIT_ISSET(u->slice) && u->cgroup_realized) | |
d79200e2 LP |
2921 | return -EBUSY; |
2922 | ||
99e66921 | 2923 | unit_ref_unset(&u->slice); |
d79200e2 LP |
2924 | unit_ref_set(&u->slice, slice); |
2925 | return 1; | |
2926 | } | |
2927 | ||
2928 | int unit_set_default_slice(Unit *u) { | |
a8833944 LP |
2929 | _cleanup_free_ char *b = NULL; |
2930 | const char *slice_name; | |
a016b922 LP |
2931 | Unit *slice; |
2932 | int r; | |
2933 | ||
2934 | assert(u); | |
2935 | ||
9444b1f2 | 2936 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2937 | return 0; |
2938 | ||
a8833944 LP |
2939 | if (u->instance) { |
2940 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2941 | |
a8833944 LP |
2942 | /* Implicitly place all instantiated units in their |
2943 | * own per-template slice */ | |
2944 | ||
7410616c LP |
2945 | r = unit_name_to_prefix(u->id, &prefix); |
2946 | if (r < 0) | |
2947 | return r; | |
a8833944 LP |
2948 | |
2949 | /* The prefix is already escaped, but it might include | |
2950 | * "-" which has a special meaning for slice units, | |
2951 | * hence escape it here extra. */ | |
7410616c | 2952 | escaped = unit_name_escape(prefix); |
a8833944 LP |
2953 | if (!escaped) |
2954 | return -ENOMEM; | |
2955 | ||
463d0d15 | 2956 | if (MANAGER_IS_SYSTEM(u->manager)) |
605405c6 | 2957 | b = strjoin("system-", escaped, ".slice"); |
a8833944 LP |
2958 | else |
2959 | b = strappend(escaped, ".slice"); | |
2960 | if (!b) | |
2961 | return -ENOMEM; | |
2962 | ||
2963 | slice_name = b; | |
2964 | } else | |
2965 | slice_name = | |
463d0d15 | 2966 | MANAGER_IS_SYSTEM(u->manager) && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
2967 | ? SPECIAL_SYSTEM_SLICE |
2968 | : SPECIAL_ROOT_SLICE; | |
2969 | ||
2970 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2971 | if (r < 0) |
2972 | return r; | |
2973 | ||
d79200e2 | 2974 | return unit_set_slice(u, slice); |
a016b922 LP |
2975 | } |
2976 | ||
9444b1f2 LP |
2977 | const char *unit_slice_name(Unit *u) { |
2978 | assert(u); | |
2979 | ||
2980 | if (!UNIT_ISSET(u->slice)) | |
2981 | return NULL; | |
2982 | ||
2983 | return UNIT_DEREF(u->slice)->id; | |
2984 | } | |
2985 | ||
f6ff8c29 | 2986 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2987 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2988 | int r; |
2989 | ||
2990 | assert(u); | |
2991 | assert(type); | |
2992 | assert(_found); | |
2993 | ||
7410616c LP |
2994 | r = unit_name_change_suffix(u->id, type, &t); |
2995 | if (r < 0) | |
2996 | return r; | |
2997 | if (unit_has_name(u, t)) | |
2998 | return -EINVAL; | |
f6ff8c29 | 2999 | |
ac155bb8 | 3000 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3001 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3002 | return r; |
3003 | } | |
3004 | ||
bbc29086 DM |
3005 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
3006 | const char *name, *old_owner, *new_owner; | |
3007 | Unit *u = userdata; | |
3008 | int r; | |
3009 | ||
3010 | assert(message); | |
3011 | assert(u); | |
3012 | ||
3013 | r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner); | |
3014 | if (r < 0) { | |
3015 | bus_log_parse_error(r); | |
3016 | return 0; | |
3017 | } | |
3018 | ||
a8ea93a5 LP |
3019 | old_owner = empty_to_null(old_owner); |
3020 | new_owner = empty_to_null(new_owner); | |
b0076268 | 3021 | |
bbc29086 DM |
3022 | if (UNIT_VTABLE(u)->bus_name_owner_change) |
3023 | UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); | |
3024 | ||
3025 | return 0; | |
3026 | } | |
3027 | ||
9806e87d LP |
3028 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3029 | const char *match; | |
bbc29086 | 3030 | |
9806e87d LP |
3031 | assert(u); |
3032 | assert(bus); | |
3033 | assert(name); | |
bbc29086 DM |
3034 | |
3035 | if (u->match_bus_slot) | |
3036 | return -EBUSY; | |
3037 | ||
9806e87d | 3038 | match = strjoina("type='signal'," |
81d62103 ZJS |
3039 | "sender='org.freedesktop.DBus'," |
3040 | "path='/org/freedesktop/DBus'," | |
3041 | "interface='org.freedesktop.DBus'," | |
3042 | "member='NameOwnerChanged'," | |
3043 | "arg0='", name, "'"); | |
bbc29086 | 3044 | |
75152a4d | 3045 | return sd_bus_add_match_async(bus, &u->match_bus_slot, match, signal_name_owner_changed, NULL, u); |
bbc29086 DM |
3046 | } |
3047 | ||
05e343b7 | 3048 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3049 | int r; |
3050 | ||
05e343b7 LP |
3051 | assert(u); |
3052 | assert(name); | |
3053 | ||
3054 | /* Watch a specific name on the bus. We only support one unit | |
3055 | * watching each name for now. */ | |
3056 | ||
bbc29086 DM |
3057 | if (u->manager->api_bus) { |
3058 | /* If the bus is already available, install the match directly. | |
3059 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3060 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3061 | if (r < 0) |
8ea823b6 | 3062 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3063 | } |
3064 | ||
3065 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3066 | if (r < 0) { | |
3067 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3068 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); | |
3069 | } | |
3070 | ||
3071 | return 0; | |
05e343b7 LP |
3072 | } |
3073 | ||
3074 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3075 | assert(u); | |
3076 | assert(name); | |
3077 | ||
8367fea5 | 3078 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3079 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
05e343b7 LP |
3080 | } |
3081 | ||
a16e1123 LP |
3082 | bool unit_can_serialize(Unit *u) { |
3083 | assert(u); | |
3084 | ||
3085 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
3086 | } | |
3087 | ||
8b108bd0 FB |
3088 | static int unit_serialize_cgroup_mask(FILE *f, const char *key, CGroupMask mask) { |
3089 | _cleanup_free_ char *s = NULL; | |
3090 | int r = 0; | |
3091 | ||
3092 | assert(f); | |
3093 | assert(key); | |
3094 | ||
3095 | if (mask != 0) { | |
3096 | r = cg_mask_to_string(mask, &s); | |
3097 | if (r >= 0) { | |
3098 | fputs(key, f); | |
3099 | fputc('=', f); | |
3100 | fputs(s, f); | |
3101 | fputc('\n', f); | |
3102 | } | |
3103 | } | |
3104 | return r; | |
3105 | } | |
3106 | ||
6b659ed8 LP |
3107 | static const char *ip_accounting_metric_field[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { |
3108 | [CGROUP_IP_INGRESS_BYTES] = "ip-accounting-ingress-bytes", | |
3109 | [CGROUP_IP_INGRESS_PACKETS] = "ip-accounting-ingress-packets", | |
3110 | [CGROUP_IP_EGRESS_BYTES] = "ip-accounting-egress-bytes", | |
3111 | [CGROUP_IP_EGRESS_PACKETS] = "ip-accounting-egress-packets", | |
3112 | }; | |
3113 | ||
6b78f9b4 | 3114 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
6b659ed8 | 3115 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3116 | int r; |
3117 | ||
3118 | assert(u); | |
3119 | assert(f); | |
3120 | assert(fds); | |
3121 | ||
9bdb98c5 LP |
3122 | if (unit_can_serialize(u)) { |
3123 | ExecRuntime *rt; | |
a16e1123 | 3124 | |
9bdb98c5 | 3125 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
3126 | if (r < 0) |
3127 | return r; | |
9bdb98c5 LP |
3128 | |
3129 | rt = unit_get_exec_runtime(u); | |
3130 | if (rt) { | |
f2341e0a | 3131 | r = exec_runtime_serialize(u, rt, f, fds); |
9bdb98c5 LP |
3132 | if (r < 0) |
3133 | return r; | |
3134 | } | |
e0209d83 MS |
3135 | } |
3136 | ||
a483fb59 LP |
3137 | dual_timestamp_serialize(f, "state-change-timestamp", &u->state_change_timestamp); |
3138 | ||
ac155bb8 MS |
3139 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
3140 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
3141 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
3142 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
a483fb59 | 3143 | |
ac155bb8 | 3144 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); |
59fccdc5 | 3145 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 3146 | |
ac155bb8 MS |
3147 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
3148 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 3149 | |
59fccdc5 LP |
3150 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
3151 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
3152 | ||
c2756a68 | 3153 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
fe700f46 | 3154 | |
d3070fbd LP |
3155 | unit_serialize_item(u, f, "exported-invocation-id", yes_no(u->exported_invocation_id)); |
3156 | unit_serialize_item(u, f, "exported-log-level-max", yes_no(u->exported_log_level_max)); | |
3157 | unit_serialize_item(u, f, "exported-log-extra-fields", yes_no(u->exported_log_extra_fields)); | |
3158 | ||
66ebf6c0 | 3159 | unit_serialize_item_format(u, f, "cpu-usage-base", "%" PRIu64, u->cpu_usage_base); |
fe700f46 LP |
3160 | if (u->cpu_usage_last != NSEC_INFINITY) |
3161 | unit_serialize_item_format(u, f, "cpu-usage-last", "%" PRIu64, u->cpu_usage_last); | |
c2756a68 LP |
3162 | |
3163 | if (u->cgroup_path) | |
3164 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
de1d4f9b | 3165 | unit_serialize_item(u, f, "cgroup-realized", yes_no(u->cgroup_realized)); |
8b108bd0 FB |
3166 | (void) unit_serialize_cgroup_mask(f, "cgroup-realized-mask", u->cgroup_realized_mask); |
3167 | (void) unit_serialize_cgroup_mask(f, "cgroup-enabled-mask", u->cgroup_enabled_mask); | |
906c06f6 | 3168 | unit_serialize_item_format(u, f, "cgroup-bpf-realized", "%i", u->cgroup_bpf_state); |
c2756a68 | 3169 | |
00d9ef85 LP |
3170 | if (uid_is_valid(u->ref_uid)) |
3171 | unit_serialize_item_format(u, f, "ref-uid", UID_FMT, u->ref_uid); | |
3172 | if (gid_is_valid(u->ref_gid)) | |
3173 | unit_serialize_item_format(u, f, "ref-gid", GID_FMT, u->ref_gid); | |
3174 | ||
4b58153d LP |
3175 | if (!sd_id128_is_null(u->invocation_id)) |
3176 | unit_serialize_item_format(u, f, "invocation-id", SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
3177 | ||
05a98afd LP |
3178 | bus_track_serialize(u->bus_track, f, "ref"); |
3179 | ||
6b659ed8 LP |
3180 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
3181 | uint64_t v; | |
3182 | ||
3183 | r = unit_get_ip_accounting(u, m, &v); | |
3184 | if (r >= 0) | |
3185 | unit_serialize_item_format(u, f, ip_accounting_metric_field[m], "%" PRIu64, v); | |
3186 | } | |
3187 | ||
613b411c LP |
3188 | if (serialize_jobs) { |
3189 | if (u->job) { | |
3190 | fprintf(f, "job\n"); | |
05a98afd | 3191 | job_serialize(u->job, f); |
613b411c LP |
3192 | } |
3193 | ||
3194 | if (u->nop_job) { | |
3195 | fprintf(f, "job\n"); | |
05a98afd | 3196 | job_serialize(u->nop_job, f); |
613b411c LP |
3197 | } |
3198 | } | |
3199 | ||
a16e1123 LP |
3200 | /* End marker */ |
3201 | fputc('\n', f); | |
3202 | return 0; | |
3203 | } | |
3204 | ||
a34ceba6 LP |
3205 | int unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { |
3206 | assert(u); | |
3207 | assert(f); | |
3208 | assert(key); | |
3209 | ||
3210 | if (!value) | |
3211 | return 0; | |
3212 | ||
3213 | fputs(key, f); | |
3214 | fputc('=', f); | |
3215 | fputs(value, f); | |
3216 | fputc('\n', f); | |
3217 | ||
3218 | return 1; | |
3219 | } | |
3220 | ||
3221 | int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *value) { | |
3222 | _cleanup_free_ char *c = NULL; | |
3223 | ||
3224 | assert(u); | |
3225 | assert(f); | |
3226 | assert(key); | |
3227 | ||
3228 | if (!value) | |
3229 | return 0; | |
3230 | ||
3231 | c = cescape(value); | |
3232 | if (!c) | |
3233 | return -ENOMEM; | |
3234 | ||
3235 | fputs(key, f); | |
3236 | fputc('=', f); | |
3237 | fputs(c, f); | |
3238 | fputc('\n', f); | |
3239 | ||
3240 | return 1; | |
3241 | } | |
3242 | ||
3243 | int unit_serialize_item_fd(Unit *u, FILE *f, FDSet *fds, const char *key, int fd) { | |
3244 | int copy; | |
3245 | ||
3246 | assert(u); | |
3247 | assert(f); | |
3248 | assert(key); | |
3249 | ||
3250 | if (fd < 0) | |
3251 | return 0; | |
3252 | ||
3253 | copy = fdset_put_dup(fds, fd); | |
3254 | if (copy < 0) | |
3255 | return copy; | |
3256 | ||
3257 | fprintf(f, "%s=%i\n", key, copy); | |
3258 | return 1; | |
3259 | } | |
3260 | ||
a16e1123 LP |
3261 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { |
3262 | va_list ap; | |
3263 | ||
3264 | assert(u); | |
3265 | assert(f); | |
3266 | assert(key); | |
3267 | assert(format); | |
3268 | ||
3269 | fputs(key, f); | |
3270 | fputc('=', f); | |
3271 | ||
3272 | va_start(ap, format); | |
3273 | vfprintf(f, format, ap); | |
3274 | va_end(ap); | |
3275 | ||
3276 | fputc('\n', f); | |
3277 | } | |
3278 | ||
a16e1123 | 3279 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
28b99ccd | 3280 | ExecRuntime **rt = NULL; |
9bdb98c5 | 3281 | size_t offset; |
a16e1123 LP |
3282 | int r; |
3283 | ||
3284 | assert(u); | |
3285 | assert(f); | |
3286 | assert(fds); | |
3287 | ||
613b411c LP |
3288 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
3289 | if (offset > 0) | |
3290 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
3291 | ||
a16e1123 | 3292 | for (;;) { |
20c03b7b | 3293 | char line[LINE_MAX], *l, *v; |
6b659ed8 | 3294 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3295 | size_t k; |
3296 | ||
3297 | if (!fgets(line, sizeof(line), f)) { | |
3298 | if (feof(f)) | |
3299 | return 0; | |
3300 | return -errno; | |
3301 | } | |
3302 | ||
10f8e83c | 3303 | char_array_0(line); |
a16e1123 LP |
3304 | l = strstrip(line); |
3305 | ||
3306 | /* End marker */ | |
e911de99 | 3307 | if (isempty(l)) |
a483fb59 | 3308 | break; |
a16e1123 LP |
3309 | |
3310 | k = strcspn(l, "="); | |
3311 | ||
3312 | if (l[k] == '=') { | |
3313 | l[k] = 0; | |
3314 | v = l+k+1; | |
3315 | } else | |
3316 | v = l+k; | |
3317 | ||
cca098b0 | 3318 | if (streq(l, "job")) { |
39a18c60 MS |
3319 | if (v[0] == '\0') { |
3320 | /* new-style serialized job */ | |
9c3349e2 LP |
3321 | Job *j; |
3322 | ||
3323 | j = job_new_raw(u); | |
39a18c60 | 3324 | if (!j) |
e911de99 | 3325 | return log_oom(); |
39a18c60 | 3326 | |
05a98afd | 3327 | r = job_deserialize(j, f); |
39a18c60 MS |
3328 | if (r < 0) { |
3329 | job_free(j); | |
3330 | return r; | |
3331 | } | |
cca098b0 | 3332 | |
39a18c60 MS |
3333 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
3334 | if (r < 0) { | |
3335 | job_free(j); | |
3336 | return r; | |
3337 | } | |
e0209d83 MS |
3338 | |
3339 | r = job_install_deserialized(j); | |
3340 | if (r < 0) { | |
3341 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
3342 | job_free(j); | |
3343 | return r; | |
3344 | } | |
ed10fa8c LP |
3345 | } else /* legacy for pre-44 */ |
3346 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); | |
cca098b0 | 3347 | continue; |
a483fb59 LP |
3348 | } else if (streq(l, "state-change-timestamp")) { |
3349 | dual_timestamp_deserialize(v, &u->state_change_timestamp); | |
3350 | continue; | |
8aaf019b | 3351 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 3352 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
3353 | continue; |
3354 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 3355 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
3356 | continue; |
3357 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 3358 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
3359 | continue; |
3360 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 3361 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 3362 | continue; |
2791a8f8 | 3363 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 3364 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 3365 | continue; |
59fccdc5 LP |
3366 | } else if (streq(l, "assert-timestamp")) { |
3367 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
3368 | continue; | |
2791a8f8 | 3369 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 3370 | |
e911de99 LP |
3371 | r = parse_boolean(v); |
3372 | if (r < 0) | |
f2341e0a | 3373 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 3374 | else |
e911de99 | 3375 | u->condition_result = r; |
efbac6d2 LP |
3376 | |
3377 | continue; | |
c2756a68 | 3378 | |
59fccdc5 | 3379 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 3380 | |
e911de99 LP |
3381 | r = parse_boolean(v); |
3382 | if (r < 0) | |
f2341e0a | 3383 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 3384 | else |
e911de99 | 3385 | u->assert_result = r; |
59fccdc5 LP |
3386 | |
3387 | continue; | |
3388 | ||
c2756a68 | 3389 | } else if (streq(l, "transient")) { |
c2756a68 | 3390 | |
e911de99 LP |
3391 | r = parse_boolean(v); |
3392 | if (r < 0) | |
f2341e0a | 3393 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 3394 | else |
e911de99 | 3395 | u->transient = r; |
c2756a68 LP |
3396 | |
3397 | continue; | |
e911de99 | 3398 | |
d3070fbd LP |
3399 | } else if (streq(l, "exported-invocation-id")) { |
3400 | ||
3401 | r = parse_boolean(v); | |
3402 | if (r < 0) | |
3403 | log_unit_debug(u, "Failed to parse exported invocation ID bool %s, ignoring.", v); | |
3404 | else | |
3405 | u->exported_invocation_id = r; | |
3406 | ||
3407 | continue; | |
3408 | ||
3409 | } else if (streq(l, "exported-log-level-max")) { | |
3410 | ||
3411 | r = parse_boolean(v); | |
3412 | if (r < 0) | |
3413 | log_unit_debug(u, "Failed to parse exported log level max bool %s, ignoring.", v); | |
3414 | else | |
3415 | u->exported_log_level_max = r; | |
3416 | ||
3417 | continue; | |
3418 | ||
3419 | } else if (streq(l, "exported-log-extra-fields")) { | |
3420 | ||
3421 | r = parse_boolean(v); | |
3422 | if (r < 0) | |
3423 | log_unit_debug(u, "Failed to parse exported log extra fields bool %s, ignoring.", v); | |
3424 | else | |
3425 | u->exported_log_extra_fields = r; | |
3426 | ||
3427 | continue; | |
3428 | ||
fe700f46 | 3429 | } else if (STR_IN_SET(l, "cpu-usage-base", "cpuacct-usage-base")) { |
5ad096b3 | 3430 | |
66ebf6c0 | 3431 | r = safe_atou64(v, &u->cpu_usage_base); |
5ad096b3 | 3432 | if (r < 0) |
fe700f46 LP |
3433 | log_unit_debug(u, "Failed to parse CPU usage base %s, ignoring.", v); |
3434 | ||
3435 | continue; | |
3436 | ||
3437 | } else if (streq(l, "cpu-usage-last")) { | |
3438 | ||
3439 | r = safe_atou64(v, &u->cpu_usage_last); | |
3440 | if (r < 0) | |
3441 | log_unit_debug(u, "Failed to read CPU usage last %s, ignoring.", v); | |
5ad096b3 | 3442 | |
0f908397 | 3443 | continue; |
4e595329 | 3444 | |
e911de99 | 3445 | } else if (streq(l, "cgroup")) { |
72673e86 | 3446 | |
e911de99 LP |
3447 | r = unit_set_cgroup_path(u, v); |
3448 | if (r < 0) | |
f2341e0a | 3449 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 3450 | |
efdb0237 LP |
3451 | (void) unit_watch_cgroup(u); |
3452 | ||
de1d4f9b WF |
3453 | continue; |
3454 | } else if (streq(l, "cgroup-realized")) { | |
3455 | int b; | |
3456 | ||
3457 | b = parse_boolean(v); | |
3458 | if (b < 0) | |
3459 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
3460 | else | |
3461 | u->cgroup_realized = b; | |
3462 | ||
c2756a68 | 3463 | continue; |
00d9ef85 | 3464 | |
8b108bd0 FB |
3465 | } else if (streq(l, "cgroup-realized-mask")) { |
3466 | ||
3467 | r = cg_mask_from_string(v, &u->cgroup_realized_mask); | |
3468 | if (r < 0) | |
3469 | log_unit_debug(u, "Failed to parse cgroup-realized-mask %s, ignoring.", v); | |
3470 | continue; | |
3471 | ||
3472 | } else if (streq(l, "cgroup-enabled-mask")) { | |
3473 | ||
3474 | r = cg_mask_from_string(v, &u->cgroup_enabled_mask); | |
3475 | if (r < 0) | |
3476 | log_unit_debug(u, "Failed to parse cgroup-enabled-mask %s, ignoring.", v); | |
3477 | continue; | |
3478 | ||
906c06f6 DM |
3479 | } else if (streq(l, "cgroup-bpf-realized")) { |
3480 | int i; | |
3481 | ||
3482 | r = safe_atoi(v, &i); | |
3483 | if (r < 0) | |
3484 | log_unit_debug(u, "Failed to parse cgroup BPF state %s, ignoring.", v); | |
3485 | else | |
3486 | u->cgroup_bpf_state = | |
3487 | i < 0 ? UNIT_CGROUP_BPF_INVALIDATED : | |
3488 | i > 0 ? UNIT_CGROUP_BPF_ON : | |
3489 | UNIT_CGROUP_BPF_OFF; | |
3490 | ||
3491 | continue; | |
3492 | ||
00d9ef85 LP |
3493 | } else if (streq(l, "ref-uid")) { |
3494 | uid_t uid; | |
3495 | ||
3496 | r = parse_uid(v, &uid); | |
3497 | if (r < 0) | |
3498 | log_unit_debug(u, "Failed to parse referenced UID %s, ignoring.", v); | |
3499 | else | |
3500 | unit_ref_uid_gid(u, uid, GID_INVALID); | |
3501 | ||
3502 | continue; | |
3503 | ||
3504 | } else if (streq(l, "ref-gid")) { | |
3505 | gid_t gid; | |
3506 | ||
3507 | r = parse_gid(v, &gid); | |
3508 | if (r < 0) | |
3509 | log_unit_debug(u, "Failed to parse referenced GID %s, ignoring.", v); | |
3510 | else | |
3511 | unit_ref_uid_gid(u, UID_INVALID, gid); | |
3512 | ||
05a98afd LP |
3513 | } else if (streq(l, "ref")) { |
3514 | ||
3515 | r = strv_extend(&u->deserialized_refs, v); | |
3516 | if (r < 0) | |
3517 | log_oom(); | |
3518 | ||
4b58153d LP |
3519 | continue; |
3520 | } else if (streq(l, "invocation-id")) { | |
3521 | sd_id128_t id; | |
3522 | ||
3523 | r = sd_id128_from_string(v, &id); | |
3524 | if (r < 0) | |
3525 | log_unit_debug(u, "Failed to parse invocation id %s, ignoring.", v); | |
3526 | else { | |
3527 | r = unit_set_invocation_id(u, id); | |
3528 | if (r < 0) | |
3529 | log_unit_warning_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
3530 | } | |
3531 | ||
00d9ef85 | 3532 | continue; |
8aaf019b | 3533 | } |
cca098b0 | 3534 | |
6b659ed8 LP |
3535 | /* Check if this is an IP accounting metric serialization field */ |
3536 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) | |
3537 | if (streq(l, ip_accounting_metric_field[m])) | |
3538 | break; | |
3539 | if (m < _CGROUP_IP_ACCOUNTING_METRIC_MAX) { | |
3540 | uint64_t c; | |
3541 | ||
3542 | r = safe_atou64(v, &c); | |
3543 | if (r < 0) | |
3544 | log_unit_debug(u, "Failed to parse IP accounting value %s, ignoring.", v); | |
3545 | else | |
3546 | u->ip_accounting_extra[m] = c; | |
3547 | continue; | |
3548 | } | |
3549 | ||
9bdb98c5 LP |
3550 | if (unit_can_serialize(u)) { |
3551 | if (rt) { | |
f2341e0a | 3552 | r = exec_runtime_deserialize_item(u, rt, l, v, fds); |
e911de99 | 3553 | if (r < 0) { |
f2341e0a | 3554 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); |
e911de99 LP |
3555 | continue; |
3556 | } | |
3557 | ||
3558 | /* Returns positive if key was handled by the call */ | |
9bdb98c5 LP |
3559 | if (r > 0) |
3560 | continue; | |
3561 | } | |
3562 | ||
3563 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); | |
613b411c | 3564 | if (r < 0) |
f2341e0a | 3565 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 3566 | } |
a16e1123 | 3567 | } |
a483fb59 LP |
3568 | |
3569 | /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is | |
3570 | * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from | |
1f133e0d | 3571 | * before 228 where the base for timeouts was not persistent across reboots. */ |
a483fb59 LP |
3572 | |
3573 | if (!dual_timestamp_is_set(&u->state_change_timestamp)) | |
3574 | dual_timestamp_get(&u->state_change_timestamp); | |
3575 | ||
58d83430 LP |
3576 | /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied |
3577 | * after we are done. For that we invalidate anything already realized, so that we can realize it again. */ | |
3578 | unit_invalidate_cgroup(u, _CGROUP_MASK_ALL); | |
3579 | unit_invalidate_cgroup_bpf(u); | |
3580 | ||
a483fb59 | 3581 | return 0; |
a16e1123 LP |
3582 | } |
3583 | ||
07429866 ZJS |
3584 | void unit_deserialize_skip(FILE *f) { |
3585 | assert(f); | |
3586 | ||
3587 | /* Skip serialized data for this unit. We don't know what it is. */ | |
3588 | ||
3589 | for (;;) { | |
3590 | char line[LINE_MAX], *l; | |
3591 | ||
3592 | if (!fgets(line, sizeof line, f)) | |
3593 | return; | |
3594 | ||
3595 | char_array_0(line); | |
3596 | l = strstrip(line); | |
3597 | ||
3598 | /* End marker */ | |
3599 | if (isempty(l)) | |
3600 | return; | |
3601 | } | |
3602 | } | |
3603 | ||
3604 | ||
eef85c4a | 3605 | int unit_add_node_dependency(Unit *u, const char *what, bool wants, UnitDependency dep, UnitDependencyMask mask) { |
6e2ef85b | 3606 | Unit *device; |
68eda4bd | 3607 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
3608 | int r; |
3609 | ||
3610 | assert(u); | |
3611 | ||
6e2ef85b | 3612 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3613 | if (isempty(what)) |
3614 | return 0; | |
6e2ef85b | 3615 | |
8407a5d0 | 3616 | if (!is_device_path(what)) |
6e2ef85b LP |
3617 | return 0; |
3618 | ||
47bc12e1 LP |
3619 | /* When device units aren't supported (such as in a |
3620 | * container), don't create dependencies on them. */ | |
1c2e9646 | 3621 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3622 | return 0; |
3623 | ||
7410616c LP |
3624 | r = unit_name_from_path(what, ".device", &e); |
3625 | if (r < 0) | |
3626 | return r; | |
6e2ef85b | 3627 | |
ac155bb8 | 3628 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3629 | if (r < 0) |
3630 | return r; | |
3631 | ||
ebc8968b FB |
3632 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3633 | dep = UNIT_BINDS_TO; | |
3634 | ||
9d06297e | 3635 | r = unit_add_two_dependencies(u, UNIT_AFTER, |
463d0d15 | 3636 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, |
eef85c4a | 3637 | device, true, mask); |
faa368e3 | 3638 | if (r < 0) |
6e2ef85b LP |
3639 | return r; |
3640 | ||
faa368e3 | 3641 | if (wants) { |
eef85c4a | 3642 | r = unit_add_dependency(device, UNIT_WANTS, u, false, mask); |
faa368e3 | 3643 | if (r < 0) |
6e2ef85b | 3644 | return r; |
faa368e3 | 3645 | } |
6e2ef85b LP |
3646 | |
3647 | return 0; | |
3648 | } | |
a16e1123 | 3649 | |
be847e82 | 3650 | int unit_coldplug(Unit *u) { |
05a98afd LP |
3651 | int r = 0, q; |
3652 | char **i; | |
cca098b0 LP |
3653 | |
3654 | assert(u); | |
3655 | ||
f78f265f LP |
3656 | /* Make sure we don't enter a loop, when coldplugging |
3657 | * recursively. */ | |
3658 | if (u->coldplugged) | |
3659 | return 0; | |
3660 | ||
3661 | u->coldplugged = true; | |
3662 | ||
05a98afd LP |
3663 | STRV_FOREACH(i, u->deserialized_refs) { |
3664 | q = bus_unit_track_add_name(u, *i); | |
3665 | if (q < 0 && r >= 0) | |
3666 | r = q; | |
3667 | } | |
3668 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 3669 | |
05a98afd LP |
3670 | if (UNIT_VTABLE(u)->coldplug) { |
3671 | q = UNIT_VTABLE(u)->coldplug(u); | |
3672 | if (q < 0 && r >= 0) | |
3673 | r = q; | |
3674 | } | |
5a6158b6 | 3675 | |
05a98afd LP |
3676 | if (u->job) { |
3677 | q = job_coldplug(u->job); | |
3678 | if (q < 0 && r >= 0) | |
3679 | r = q; | |
3680 | } | |
cca098b0 | 3681 | |
05a98afd | 3682 | return r; |
cca098b0 LP |
3683 | } |
3684 | ||
ba25d39e | 3685 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3686 | struct stat st; |
3687 | ||
3688 | if (!path) | |
3689 | return false; | |
3690 | ||
77969722 LP |
3691 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3692 | * are never out-of-date. */ | |
3693 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3694 | return false; | |
3695 | ||
21b95806 ZJS |
3696 | if (stat(path, &st) < 0) |
3697 | /* What, cannot access this anymore? */ | |
3698 | return true; | |
3699 | ||
ba25d39e ZJS |
3700 | if (path_masked) |
3701 | /* For masked files check if they are still so */ | |
3702 | return !null_or_empty(&st); | |
3703 | else | |
3a8db9fe | 3704 | /* For non-empty files check the mtime */ |
87ec20ef | 3705 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3706 | |
3707 | return false; | |
3708 | } | |
3709 | ||
45fb0699 | 3710 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
3711 | _cleanup_strv_free_ char **t = NULL; |
3712 | char **path; | |
1b64d026 | 3713 | |
45fb0699 LP |
3714 | assert(u); |
3715 | ||
ba25d39e ZJS |
3716 | /* For unit files, we allow masking… */ |
3717 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3718 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3719 | return true; |
5f4b19f4 | 3720 | |
ba25d39e ZJS |
3721 | /* Source paths should not be masked… */ |
3722 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3723 | return true; |
ae7a7182 | 3724 | |
19a44dfe LR |
3725 | if (u->load_state == UNIT_LOADED) |
3726 | (void) unit_find_dropin_paths(u, &t); | |
ab932a62 LP |
3727 | if (!strv_equal(u->dropin_paths, t)) |
3728 | return true; | |
6d10d308 | 3729 | |
ba25d39e | 3730 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3731 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3732 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3733 | return true; |
21b95806 | 3734 | |
ab932a62 | 3735 | return false; |
45fb0699 LP |
3736 | } |
3737 | ||
fdf20a31 | 3738 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3739 | assert(u); |
3740 | ||
fdf20a31 MM |
3741 | if (UNIT_VTABLE(u)->reset_failed) |
3742 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 LP |
3743 | |
3744 | RATELIMIT_RESET(u->start_limit); | |
3745 | u->start_limit_hit = false; | |
5632e374 LP |
3746 | } |
3747 | ||
a7f241db LP |
3748 | Unit *unit_following(Unit *u) { |
3749 | assert(u); | |
3750 | ||
3751 | if (UNIT_VTABLE(u)->following) | |
3752 | return UNIT_VTABLE(u)->following(u); | |
3753 | ||
3754 | return NULL; | |
3755 | } | |
3756 | ||
31afa0a4 | 3757 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3758 | assert(u); |
3759 | ||
31afa0a4 LP |
3760 | /* This call does check the current state of the unit. It's |
3761 | * hence useful to be called from state change calls of the | |
3762 | * unit itself, where the state isn't updated yet. This is | |
3763 | * different from unit_inactive_or_pending() which checks both | |
3764 | * the current state and for a queued job. */ | |
18ffdfda | 3765 | |
31afa0a4 LP |
3766 | return u->job && u->job->type == JOB_STOP; |
3767 | } | |
3768 | ||
3769 | bool unit_inactive_or_pending(Unit *u) { | |
3770 | assert(u); | |
3771 | ||
3772 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3773 | |
d956ac29 LP |
3774 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3775 | return true; | |
3776 | ||
31afa0a4 | 3777 | if (unit_stop_pending(u)) |
18ffdfda LP |
3778 | return true; |
3779 | ||
3780 | return false; | |
3781 | } | |
3782 | ||
31afa0a4 | 3783 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3784 | assert(u); |
3785 | ||
f60c2665 | 3786 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3787 | |
3788 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3789 | return true; | |
3790 | ||
ac155bb8 | 3791 | if (u->job && |
3742095b | 3792 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
3793 | return true; |
3794 | ||
3795 | return false; | |
3796 | } | |
3797 | ||
deb4e708 MK |
3798 | bool unit_will_restart(Unit *u) { |
3799 | assert(u); | |
3800 | ||
3801 | if (!UNIT_VTABLE(u)->will_restart) | |
3802 | return false; | |
3803 | ||
3804 | return UNIT_VTABLE(u)->will_restart(u); | |
3805 | } | |
3806 | ||
718db961 | 3807 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3808 | assert(u); |
3809 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 3810 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 3811 | |
8a0867d6 | 3812 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3813 | return -EOPNOTSUPP; |
8a0867d6 | 3814 | |
c74f17d9 | 3815 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3816 | } |
3817 | ||
82659fd7 LP |
3818 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
3819 | Set *pid_set; | |
3820 | int r; | |
3821 | ||
d5099efc | 3822 | pid_set = set_new(NULL); |
82659fd7 LP |
3823 | if (!pid_set) |
3824 | return NULL; | |
3825 | ||
3826 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3827 | if (main_pid > 0) { | |
fea72cc0 | 3828 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 LP |
3829 | if (r < 0) |
3830 | goto fail; | |
3831 | } | |
3832 | ||
3833 | if (control_pid > 0) { | |
fea72cc0 | 3834 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 LP |
3835 | if (r < 0) |
3836 | goto fail; | |
3837 | } | |
3838 | ||
3839 | return pid_set; | |
3840 | ||
3841 | fail: | |
3842 | set_free(pid_set); | |
3843 | return NULL; | |
3844 | } | |
3845 | ||
d91c34f2 LP |
3846 | int unit_kill_common( |
3847 | Unit *u, | |
3848 | KillWho who, | |
3849 | int signo, | |
3850 | pid_t main_pid, | |
3851 | pid_t control_pid, | |
718db961 | 3852 | sd_bus_error *error) { |
d91c34f2 | 3853 | |
814cc562 | 3854 | int r = 0; |
ac5e3a50 | 3855 | bool killed = false; |
814cc562 | 3856 | |
ac5e3a50 | 3857 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3858 | if (main_pid < 0) |
7358dc02 | 3859 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 3860 | else if (main_pid == 0) |
7358dc02 | 3861 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3862 | } |
3863 | ||
ac5e3a50 | 3864 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3865 | if (control_pid < 0) |
7358dc02 | 3866 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 3867 | else if (control_pid == 0) |
7358dc02 | 3868 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3869 | } |
3870 | ||
ac5e3a50 JS |
3871 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3872 | if (control_pid > 0) { | |
814cc562 MS |
3873 | if (kill(control_pid, signo) < 0) |
3874 | r = -errno; | |
ac5e3a50 JS |
3875 | else |
3876 | killed = true; | |
3877 | } | |
814cc562 | 3878 | |
ac5e3a50 JS |
3879 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3880 | if (main_pid > 0) { | |
814cc562 MS |
3881 | if (kill(main_pid, signo) < 0) |
3882 | r = -errno; | |
ac5e3a50 JS |
3883 | else |
3884 | killed = true; | |
3885 | } | |
814cc562 | 3886 | |
ac5e3a50 | 3887 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3888 | _cleanup_set_free_ Set *pid_set = NULL; |
3889 | int q; | |
3890 | ||
82659fd7 LP |
3891 | /* Exclude the main/control pids from being killed via the cgroup */ |
3892 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3893 | if (!pid_set) |
3894 | return -ENOMEM; | |
3895 | ||
1d98fef1 | 3896 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, NULL, NULL); |
4c701096 | 3897 | if (q < 0 && !IN_SET(q, -EAGAIN, -ESRCH, -ENOENT)) |
814cc562 | 3898 | r = q; |
ac5e3a50 JS |
3899 | else |
3900 | killed = true; | |
814cc562 MS |
3901 | } |
3902 | ||
201f0c91 | 3903 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL)) |
ac5e3a50 JS |
3904 | return -ESRCH; |
3905 | ||
814cc562 MS |
3906 | return r; |
3907 | } | |
3908 | ||
6210e7fc LP |
3909 | int unit_following_set(Unit *u, Set **s) { |
3910 | assert(u); | |
3911 | assert(s); | |
3912 | ||
3913 | if (UNIT_VTABLE(u)->following_set) | |
3914 | return UNIT_VTABLE(u)->following_set(u, s); | |
3915 | ||
3916 | *s = NULL; | |
3917 | return 0; | |
3918 | } | |
3919 | ||
a4375746 | 3920 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
3921 | int r; |
3922 | ||
a4375746 LP |
3923 | assert(u); |
3924 | ||
0ec0deaa LP |
3925 | if (u->unit_file_state < 0 && u->fragment_path) { |
3926 | r = unit_file_get_state( | |
463d0d15 | 3927 | u->manager->unit_file_scope, |
0ec0deaa LP |
3928 | NULL, |
3929 | basename(u->fragment_path), | |
3930 | &u->unit_file_state); | |
3931 | if (r < 0) | |
3932 | u->unit_file_state = UNIT_FILE_BAD; | |
3933 | } | |
a4375746 | 3934 | |
ac155bb8 | 3935 | return u->unit_file_state; |
a4375746 LP |
3936 | } |
3937 | ||
d2dc52db LP |
3938 | int unit_get_unit_file_preset(Unit *u) { |
3939 | assert(u); | |
3940 | ||
3941 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3942 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 3943 | u->manager->unit_file_scope, |
0ec0deaa LP |
3944 | NULL, |
3945 | basename(u->fragment_path)); | |
d2dc52db LP |
3946 | |
3947 | return u->unit_file_preset; | |
3948 | } | |
3949 | ||
57020a3a LP |
3950 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
3951 | assert(ref); | |
3952 | assert(u); | |
3953 | ||
3954 | if (ref->unit) | |
3955 | unit_ref_unset(ref); | |
3956 | ||
3957 | ref->unit = u; | |
71fda00f | 3958 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
3959 | return u; |
3960 | } | |
3961 | ||
3962 | void unit_ref_unset(UnitRef *ref) { | |
3963 | assert(ref); | |
3964 | ||
3965 | if (!ref->unit) | |
3966 | return; | |
3967 | ||
b75102e5 LP |
3968 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
3969 | * be unreferenced now. */ | |
3970 | unit_add_to_gc_queue(ref->unit); | |
3971 | ||
71fda00f | 3972 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
3973 | ref->unit = NULL; |
3974 | } | |
3975 | ||
29206d46 LP |
3976 | static int user_from_unit_name(Unit *u, char **ret) { |
3977 | ||
3978 | static const uint8_t hash_key[] = { | |
3979 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
3980 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
3981 | }; | |
3982 | ||
3983 | _cleanup_free_ char *n = NULL; | |
3984 | int r; | |
3985 | ||
3986 | r = unit_name_to_prefix(u->id, &n); | |
3987 | if (r < 0) | |
3988 | return r; | |
3989 | ||
3990 | if (valid_user_group_name(n)) { | |
3991 | *ret = n; | |
3992 | n = NULL; | |
3993 | return 0; | |
3994 | } | |
3995 | ||
3996 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
3997 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
3998 | return -ENOMEM; | |
3999 | ||
4000 | return 0; | |
4001 | } | |
4002 | ||
598459ce LP |
4003 | int unit_patch_contexts(Unit *u) { |
4004 | CGroupContext *cc; | |
4005 | ExecContext *ec; | |
cba6e062 LP |
4006 | unsigned i; |
4007 | int r; | |
4008 | ||
e06c73cc | 4009 | assert(u); |
e06c73cc | 4010 | |
598459ce LP |
4011 | /* Patch in the manager defaults into the exec and cgroup |
4012 | * contexts, _after_ the rest of the settings have been | |
4013 | * initialized */ | |
085afe36 | 4014 | |
598459ce LP |
4015 | ec = unit_get_exec_context(u); |
4016 | if (ec) { | |
4017 | /* This only copies in the ones that need memory */ | |
4018 | for (i = 0; i < _RLIMIT_MAX; i++) | |
4019 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
4020 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
4021 | if (!ec->rlimit[i]) | |
4022 | return -ENOMEM; | |
4023 | } | |
4024 | ||
463d0d15 | 4025 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4026 | !ec->working_directory) { |
4027 | ||
4028 | r = get_home_dir(&ec->working_directory); | |
4029 | if (r < 0) | |
4030 | return r; | |
4c08c824 LP |
4031 | |
4032 | /* Allow user services to run, even if the | |
4033 | * home directory is missing */ | |
4034 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4035 | } |
4036 | ||
598459ce | 4037 | if (ec->private_devices) |
2cd0a735 | 4038 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4039 | |
4040 | if (ec->protect_kernel_modules) | |
4041 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 LP |
4042 | |
4043 | if (ec->dynamic_user) { | |
4044 | if (!ec->user) { | |
4045 | r = user_from_unit_name(u, &ec->user); | |
4046 | if (r < 0) | |
4047 | return r; | |
4048 | } | |
4049 | ||
4050 | if (!ec->group) { | |
4051 | ec->group = strdup(ec->user); | |
4052 | if (!ec->group) | |
4053 | return -ENOMEM; | |
4054 | } | |
4055 | ||
63bb64a0 LP |
4056 | /* If the dynamic user option is on, let's make sure that the unit can't leave its UID/GID |
4057 | * around in the file system or on IPC objects. Hence enforce a strict sandbox. */ | |
4058 | ||
29206d46 | 4059 | ec->private_tmp = true; |
00d9ef85 | 4060 | ec->remove_ipc = true; |
63bb64a0 LP |
4061 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4062 | if (ec->protect_home == PROTECT_HOME_NO) | |
4063 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
29206d46 | 4064 | } |
cba6e062 LP |
4065 | } |
4066 | ||
598459ce LP |
4067 | cc = unit_get_cgroup_context(u); |
4068 | if (cc) { | |
f513e420 | 4069 | |
598459ce LP |
4070 | if (ec && |
4071 | ec->private_devices && | |
4072 | cc->device_policy == CGROUP_AUTO) | |
4073 | cc->device_policy = CGROUP_CLOSED; | |
4074 | } | |
f1660f96 | 4075 | |
cba6e062 | 4076 | return 0; |
e06c73cc LP |
4077 | } |
4078 | ||
3ef63c31 LP |
4079 | ExecContext *unit_get_exec_context(Unit *u) { |
4080 | size_t offset; | |
4081 | assert(u); | |
4082 | ||
598459ce LP |
4083 | if (u->type < 0) |
4084 | return NULL; | |
4085 | ||
3ef63c31 LP |
4086 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4087 | if (offset <= 0) | |
4088 | return NULL; | |
4089 | ||
4090 | return (ExecContext*) ((uint8_t*) u + offset); | |
4091 | } | |
4092 | ||
718db961 LP |
4093 | KillContext *unit_get_kill_context(Unit *u) { |
4094 | size_t offset; | |
4095 | assert(u); | |
4096 | ||
598459ce LP |
4097 | if (u->type < 0) |
4098 | return NULL; | |
4099 | ||
718db961 LP |
4100 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4101 | if (offset <= 0) | |
4102 | return NULL; | |
4103 | ||
4104 | return (KillContext*) ((uint8_t*) u + offset); | |
4105 | } | |
4106 | ||
4ad49000 LP |
4107 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4108 | size_t offset; | |
4109 | ||
598459ce LP |
4110 | if (u->type < 0) |
4111 | return NULL; | |
4112 | ||
4ad49000 LP |
4113 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4114 | if (offset <= 0) | |
4115 | return NULL; | |
4116 | ||
4117 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4118 | } | |
4119 | ||
613b411c LP |
4120 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4121 | size_t offset; | |
4122 | ||
598459ce LP |
4123 | if (u->type < 0) |
4124 | return NULL; | |
4125 | ||
613b411c LP |
4126 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4127 | if (offset <= 0) | |
4128 | return NULL; | |
4129 | ||
4130 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4131 | } | |
4132 | ||
2e59b241 | 4133 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4134 | assert(u); |
4135 | ||
2e59b241 | 4136 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4137 | return NULL; |
4138 | ||
39591351 LP |
4139 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4140 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4141 | |
2e59b241 | 4142 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4143 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4144 | |
2e59b241 LP |
4145 | if (flags & UNIT_RUNTIME) |
4146 | return u->manager->lookup_paths.runtime_control; | |
4147 | ||
39591351 | 4148 | return NULL; |
71645aca LP |
4149 | } |
4150 | ||
2e59b241 LP |
4151 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4152 | char *ret = NULL; | |
4153 | ||
4154 | if (!s) | |
4155 | return NULL; | |
4156 | ||
4157 | /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated | |
4158 | * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is | |
4159 | * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly | |
4160 | * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is | |
4161 | * not specified, then the return value always needs to be freed. Callers can use this to optimize memory | |
4162 | * allocations. */ | |
4163 | ||
4164 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
4165 | ret = specifier_escape(s); | |
4166 | if (!ret) | |
4167 | return NULL; | |
4168 | ||
4169 | s = ret; | |
4170 | } | |
4171 | ||
4172 | if (flags & UNIT_ESCAPE_C) { | |
4173 | char *a; | |
4174 | ||
4175 | a = cescape(s); | |
4176 | free(ret); | |
4177 | if (!a) | |
4178 | return NULL; | |
4179 | ||
4180 | ret = a; | |
4181 | } | |
4182 | ||
4183 | if (buf) { | |
4184 | *buf = ret; | |
4185 | return ret ?: (char*) s; | |
4186 | } | |
4187 | ||
4188 | return ret ?: strdup(s); | |
4189 | } | |
4190 | ||
4191 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4192 | _cleanup_free_ char *result = NULL; | |
4193 | size_t n = 0, allocated = 0; | |
4194 | char **i, *ret; | |
4195 | ||
4196 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a | |
4197 | * way suitable for ExecStart= stanzas */ | |
4198 | ||
4199 | STRV_FOREACH(i, l) { | |
4200 | _cleanup_free_ char *buf = NULL; | |
4201 | const char *p; | |
4202 | size_t a; | |
4203 | char *q; | |
4204 | ||
4205 | p = unit_escape_setting(*i, flags, &buf); | |
4206 | if (!p) | |
4207 | return NULL; | |
4208 | ||
4209 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
4210 | if (!GREEDY_REALLOC(result, allocated, n + a + 1)) | |
4211 | return NULL; | |
4212 | ||
4213 | q = result + n; | |
4214 | if (n > 0) | |
4215 | *(q++) = ' '; | |
4216 | ||
4217 | *(q++) = '"'; | |
4218 | q = stpcpy(q, p); | |
4219 | *(q++) = '"'; | |
4220 | ||
4221 | n += a; | |
4222 | } | |
4223 | ||
4224 | if (!GREEDY_REALLOC(result, allocated, n + 1)) | |
4225 | return NULL; | |
4226 | ||
4227 | result[n] = 0; | |
4228 | ||
4229 | ret = result; | |
4230 | result = NULL; | |
4231 | ||
4232 | return ret; | |
4233 | } | |
4234 | ||
4235 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4236 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4237 | const char *dir, *wrapped; |
26d04f86 | 4238 | int r; |
71645aca LP |
4239 | |
4240 | assert(u); | |
2e59b241 LP |
4241 | assert(name); |
4242 | assert(data); | |
4243 | ||
4244 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4245 | return 0; | |
4246 | ||
4247 | data = unit_escape_setting(data, flags, &escaped); | |
4248 | if (!data) | |
4249 | return -ENOMEM; | |
4250 | ||
4251 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4252 | * previous section header is the same */ | |
4253 | ||
4254 | if (flags & UNIT_PRIVATE) { | |
4255 | if (!UNIT_VTABLE(u)->private_section) | |
4256 | return -EINVAL; | |
4257 | ||
4258 | if (!u->transient_file || u->last_section_private < 0) | |
4259 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4260 | else if (u->last_section_private == 0) | |
4261 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4262 | } else { | |
4263 | if (!u->transient_file || u->last_section_private < 0) | |
4264 | data = strjoina("[Unit]\n", data); | |
4265 | else if (u->last_section_private > 0) | |
4266 | data = strjoina("\n[Unit]\n", data); | |
4267 | } | |
71645aca | 4268 | |
4f4afc88 LP |
4269 | if (u->transient_file) { |
4270 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4271 | * write to the transient unit file. */ | |
4272 | fputs(data, u->transient_file); | |
4f4afc88 | 4273 | |
2e59b241 LP |
4274 | if (!endswith(data, "\n")) |
4275 | fputc('\n', u->transient_file); | |
4276 | ||
4277 | /* Remember which section we wrote this entry to */ | |
4278 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4279 | return 0; |
2e59b241 | 4280 | } |
8e2af478 | 4281 | |
2e59b241 | 4282 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4283 | if (!dir) |
4284 | return -EINVAL; | |
71645aca | 4285 | |
2a9a6f8a | 4286 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4287 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4288 | data, |
4289 | "\n"); | |
e20b2a86 | 4290 | |
815b09d3 | 4291 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4292 | if (r < 0) |
4293 | return r; | |
4294 | ||
45639f1b | 4295 | (void) mkdir_p_label(p, 0755); |
2a9a6f8a | 4296 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4297 | if (r < 0) |
4298 | return r; | |
4299 | ||
815b09d3 | 4300 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4301 | if (r < 0) |
4302 | return r; | |
815b09d3 | 4303 | q = NULL; |
adb76a70 | 4304 | |
adb76a70 WC |
4305 | strv_uniq(u->dropin_paths); |
4306 | ||
4307 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4308 | ||
4309 | return 0; | |
26d04f86 | 4310 | } |
71645aca | 4311 | |
2e59b241 | 4312 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4313 | _cleanup_free_ char *p = NULL; |
4314 | va_list ap; | |
4315 | int r; | |
4316 | ||
4317 | assert(u); | |
4318 | assert(name); | |
4319 | assert(format); | |
4320 | ||
2e59b241 | 4321 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4322 | return 0; |
4323 | ||
4324 | va_start(ap, format); | |
4325 | r = vasprintf(&p, format, ap); | |
4326 | va_end(ap); | |
4327 | ||
4328 | if (r < 0) | |
4329 | return -ENOMEM; | |
4330 | ||
2e59b241 | 4331 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4332 | } |
71645aca | 4333 | |
c2756a68 | 4334 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4335 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4336 | FILE *f; |
4f4afc88 | 4337 | |
c2756a68 LP |
4338 | assert(u); |
4339 | ||
3f5e8115 LP |
4340 | if (!UNIT_VTABLE(u)->can_transient) |
4341 | return -EOPNOTSUPP; | |
4342 | ||
45639f1b LP |
4343 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4344 | ||
605405c6 | 4345 | path = strjoin(u->manager->lookup_paths.transient, "/", u->id); |
4f4afc88 LP |
4346 | if (!path) |
4347 | return -ENOMEM; | |
4348 | ||
4349 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4350 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4351 | ||
78e334b5 | 4352 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 4353 | f = fopen(path, "we"); |
0126c8f3 | 4354 | if (!f) |
78e334b5 | 4355 | return -errno; |
4f4afc88 LP |
4356 | } |
4357 | ||
0126c8f3 | 4358 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4359 | u->transient_file = f; |
4360 | ||
0126c8f3 | 4361 | free_and_replace(u->fragment_path, path); |
7c65093a | 4362 | |
7c65093a LP |
4363 | u->source_path = mfree(u->source_path); |
4364 | u->dropin_paths = strv_free(u->dropin_paths); | |
4365 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4366 | ||
4f4afc88 LP |
4367 | u->load_state = UNIT_STUB; |
4368 | u->load_error = 0; | |
4369 | u->transient = true; | |
4370 | ||
7c65093a LP |
4371 | unit_add_to_dbus_queue(u); |
4372 | unit_add_to_gc_queue(u); | |
c2756a68 | 4373 | |
4f4afc88 LP |
4374 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4375 | u->transient_file); | |
4376 | ||
3f5e8115 | 4377 | return 0; |
c2756a68 LP |
4378 | } |
4379 | ||
1d98fef1 LP |
4380 | static void log_kill(pid_t pid, int sig, void *userdata) { |
4381 | _cleanup_free_ char *comm = NULL; | |
4382 | ||
4383 | (void) get_process_comm(pid, &comm); | |
4384 | ||
4385 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4386 | only, like for example systemd's own PAM stub process. */ | |
4387 | if (comm && comm[0] == '(') | |
4388 | return; | |
4389 | ||
4390 | log_unit_notice(userdata, | |
4391 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4392 | pid, | |
4393 | strna(comm), | |
4394 | signal_to_string(sig)); | |
4395 | } | |
4396 | ||
4397 | static int operation_to_signal(KillContext *c, KillOperation k) { | |
4398 | assert(c); | |
4399 | ||
4400 | switch (k) { | |
4401 | ||
4402 | case KILL_TERMINATE: | |
4403 | case KILL_TERMINATE_AND_LOG: | |
4404 | return c->kill_signal; | |
4405 | ||
4406 | case KILL_KILL: | |
4407 | return SIGKILL; | |
4408 | ||
4409 | case KILL_ABORT: | |
4410 | return SIGABRT; | |
4411 | ||
4412 | default: | |
4413 | assert_not_reached("KillOperation unknown"); | |
4414 | } | |
4415 | } | |
4416 | ||
cd2086fe LP |
4417 | int unit_kill_context( |
4418 | Unit *u, | |
4419 | KillContext *c, | |
db2cb23b | 4420 | KillOperation k, |
cd2086fe LP |
4421 | pid_t main_pid, |
4422 | pid_t control_pid, | |
4423 | bool main_pid_alien) { | |
4424 | ||
1d98fef1 | 4425 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4426 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4427 | int sig, r; |
cd2086fe LP |
4428 | |
4429 | assert(u); | |
4430 | assert(c); | |
4431 | ||
59ec09a8 ZJS |
4432 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. |
4433 | * Returns > 0 if we killed something worth waiting for, 0 otherwise. */ | |
1d98fef1 | 4434 | |
cd2086fe LP |
4435 | if (c->kill_mode == KILL_NONE) |
4436 | return 0; | |
4437 | ||
1d98fef1 LP |
4438 | sig = operation_to_signal(c, k); |
4439 | ||
4440 | send_sighup = | |
4441 | c->send_sighup && | |
4442 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4443 | sig != SIGHUP; | |
4444 | ||
59ec09a8 ZJS |
4445 | if (k != KILL_TERMINATE || IN_SET(sig, SIGKILL, SIGABRT)) |
4446 | log_func = log_kill; | |
cd2086fe LP |
4447 | |
4448 | if (main_pid > 0) { | |
1d98fef1 LP |
4449 | if (log_func) |
4450 | log_func(main_pid, sig, u); | |
cd2086fe | 4451 | |
1d98fef1 | 4452 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4453 | if (r < 0 && r != -ESRCH) { |
4454 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4455 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 4456 | |
b821a397 | 4457 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 4458 | } else { |
bc6aed7b LP |
4459 | if (!main_pid_alien) |
4460 | wait_for_exit = true; | |
82659fd7 | 4461 | |
1d98fef1 | 4462 | if (r != -ESRCH && send_sighup) |
d0667321 | 4463 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 4464 | } |
cd2086fe LP |
4465 | } |
4466 | ||
4467 | if (control_pid > 0) { | |
1d98fef1 LP |
4468 | if (log_func) |
4469 | log_func(control_pid, sig, u); | |
cd2086fe | 4470 | |
1d98fef1 | 4471 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4472 | if (r < 0 && r != -ESRCH) { |
4473 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4474 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 4475 | |
b821a397 | 4476 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 4477 | } else { |
cd2086fe | 4478 | wait_for_exit = true; |
82659fd7 | 4479 | |
1d98fef1 | 4480 | if (r != -ESRCH && send_sighup) |
d0667321 | 4481 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 4482 | } |
cd2086fe LP |
4483 | } |
4484 | ||
b821a397 LP |
4485 | if (u->cgroup_path && |
4486 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4487 | _cleanup_set_free_ Set *pid_set = NULL; |
4488 | ||
82659fd7 LP |
4489 | /* Exclude the main/control pids from being killed via the cgroup */ |
4490 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4491 | if (!pid_set) |
4492 | return -ENOMEM; | |
4493 | ||
1d98fef1 LP |
4494 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4495 | sig, | |
4496 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4497 | pid_set, | |
4498 | log_func, u); | |
cd2086fe | 4499 | if (r < 0) { |
4c701096 | 4500 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
b821a397 LP |
4501 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
4502 | ||
82659fd7 | 4503 | } else if (r > 0) { |
bc6aed7b | 4504 | |
efdb0237 LP |
4505 | /* FIXME: For now, on the legacy hierarchy, we |
4506 | * will not wait for the cgroup members to die | |
4507 | * if we are running in a container or if this | |
4508 | * is a delegation unit, simply because cgroup | |
4509 | * notification is unreliable in these | |
4510 | * cases. It doesn't work at all in | |
4511 | * containers, and outside of containers it | |
4512 | * can be confused easily by left-over | |
ccddd104 | 4513 | * directories in the cgroup — which however |
efdb0237 LP |
4514 | * should not exist in non-delegated units. On |
4515 | * the unified hierarchy that's different, | |
4516 | * there we get proper events. Hence rely on | |
13e785f7 | 4517 | * them. */ |
efdb0237 | 4518 | |
c22800e4 | 4519 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
2e4025c0 | 4520 | (detect_container() == 0 && !UNIT_CGROUP_BOOL(u, delegate))) |
e9db43d5 | 4521 | wait_for_exit = true; |
58ea275a | 4522 | |
1d98fef1 | 4523 | if (send_sighup) { |
82659fd7 LP |
4524 | set_free(pid_set); |
4525 | ||
4526 | pid_set = unit_pid_set(main_pid, control_pid); | |
4527 | if (!pid_set) | |
4528 | return -ENOMEM; | |
4529 | ||
1d98fef1 LP |
4530 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4531 | SIGHUP, | |
4532 | CGROUP_IGNORE_SELF, | |
4533 | pid_set, | |
4534 | NULL, NULL); | |
82659fd7 LP |
4535 | } |
4536 | } | |
cd2086fe LP |
4537 | } |
4538 | ||
4539 | return wait_for_exit; | |
4540 | } | |
4541 | ||
eef85c4a | 4542 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
a57f7e2c | 4543 | char prefix[strlen(path) + 1], *p; |
eef85c4a | 4544 | UnitDependencyInfo di; |
a57f7e2c LP |
4545 | int r; |
4546 | ||
4547 | assert(u); | |
4548 | assert(path); | |
4549 | ||
eef85c4a LP |
4550 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in |
4551 | * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to | |
4552 | * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily | |
4553 | * determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4554 | |
70b64bd3 ZJS |
4555 | if (!path_is_absolute(path)) |
4556 | return -EINVAL; | |
4557 | ||
eef85c4a LP |
4558 | r = hashmap_ensure_allocated(&u->requires_mounts_for, &string_hash_ops); |
4559 | if (r < 0) | |
4560 | return r; | |
4561 | ||
a57f7e2c LP |
4562 | p = strdup(path); |
4563 | if (!p) | |
4564 | return -ENOMEM; | |
4565 | ||
4566 | path_kill_slashes(p); | |
4567 | ||
99be45a4 | 4568 | if (!path_is_normalized(p)) { |
a57f7e2c LP |
4569 | free(p); |
4570 | return -EPERM; | |
4571 | } | |
4572 | ||
eef85c4a | 4573 | if (hashmap_contains(u->requires_mounts_for, p)) { |
a57f7e2c LP |
4574 | free(p); |
4575 | return 0; | |
4576 | } | |
4577 | ||
eef85c4a LP |
4578 | di = (UnitDependencyInfo) { |
4579 | .origin_mask = mask | |
4580 | }; | |
4581 | ||
4582 | r = hashmap_put(u->requires_mounts_for, p, di.data); | |
4583 | if (r < 0) { | |
4584 | free(p); | |
a57f7e2c | 4585 | return r; |
eef85c4a | 4586 | } |
a57f7e2c LP |
4587 | |
4588 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
4589 | Set *x; | |
4590 | ||
4591 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4592 | if (!x) { | |
4593 | char *q; | |
4594 | ||
742f41ad LP |
4595 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &string_hash_ops); |
4596 | if (r < 0) | |
4597 | return r; | |
a57f7e2c LP |
4598 | |
4599 | q = strdup(prefix); | |
4600 | if (!q) | |
4601 | return -ENOMEM; | |
4602 | ||
d5099efc | 4603 | x = set_new(NULL); |
a57f7e2c LP |
4604 | if (!x) { |
4605 | free(q); | |
4606 | return -ENOMEM; | |
4607 | } | |
4608 | ||
4609 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4610 | if (r < 0) { | |
4611 | free(q); | |
4612 | set_free(x); | |
4613 | return r; | |
4614 | } | |
4615 | } | |
4616 | ||
4617 | r = set_put(x, u); | |
4618 | if (r < 0) | |
4619 | return r; | |
4620 | } | |
4621 | ||
4622 | return 0; | |
4623 | } | |
4624 | ||
613b411c LP |
4625 | int unit_setup_exec_runtime(Unit *u) { |
4626 | ExecRuntime **rt; | |
4627 | size_t offset; | |
613b411c | 4628 | Unit *other; |
eef85c4a LP |
4629 | Iterator i; |
4630 | void *v; | |
613b411c LP |
4631 | |
4632 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4633 | assert(offset > 0); | |
4634 | ||
06b643e7 | 4635 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
4636 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
4637 | if (*rt) | |
4638 | return 0; | |
4639 | ||
4640 | /* Try to get it from somebody else */ | |
eef85c4a | 4641 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { |
613b411c LP |
4642 | |
4643 | *rt = unit_get_exec_runtime(other); | |
4644 | if (*rt) { | |
4645 | exec_runtime_ref(*rt); | |
4646 | return 0; | |
4647 | } | |
4648 | } | |
4649 | ||
4650 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
4651 | } | |
4652 | ||
29206d46 LP |
4653 | int unit_setup_dynamic_creds(Unit *u) { |
4654 | ExecContext *ec; | |
4655 | DynamicCreds *dcreds; | |
4656 | size_t offset; | |
4657 | ||
4658 | assert(u); | |
4659 | ||
4660 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
4661 | assert(offset > 0); | |
4662 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
4663 | ||
4664 | ec = unit_get_exec_context(u); | |
4665 | assert(ec); | |
4666 | ||
4667 | if (!ec->dynamic_user) | |
4668 | return 0; | |
4669 | ||
4670 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
4671 | } | |
4672 | ||
1c2e9646 LP |
4673 | bool unit_type_supported(UnitType t) { |
4674 | if (_unlikely_(t < 0)) | |
4675 | return false; | |
4676 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
4677 | return false; | |
4678 | ||
4679 | if (!unit_vtable[t]->supported) | |
4680 | return true; | |
4681 | ||
4682 | return unit_vtable[t]->supported(); | |
4683 | } | |
4684 | ||
8b4305c7 LP |
4685 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
4686 | int r; | |
4687 | ||
4688 | assert(u); | |
4689 | assert(where); | |
4690 | ||
4691 | r = dir_is_empty(where); | |
4692 | if (r > 0) | |
4693 | return; | |
4694 | if (r < 0) { | |
4695 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
4696 | return; | |
4697 | } | |
4698 | ||
4699 | log_struct(LOG_NOTICE, | |
2b044526 | 4700 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4701 | LOG_UNIT_ID(u), |
f1c50bec | 4702 | LOG_UNIT_INVOCATION_ID(u), |
8b4305c7 LP |
4703 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), |
4704 | "WHERE=%s", where, | |
4705 | NULL); | |
4706 | } | |
4707 | ||
4708 | int unit_fail_if_symlink(Unit *u, const char* where) { | |
4709 | int r; | |
4710 | ||
4711 | assert(u); | |
4712 | assert(where); | |
4713 | ||
4714 | r = is_symlink(where); | |
4715 | if (r < 0) { | |
4716 | log_unit_debug_errno(u, r, "Failed to check symlink %s, ignoring: %m", where); | |
4717 | return 0; | |
4718 | } | |
4719 | if (r == 0) | |
4720 | return 0; | |
4721 | ||
4722 | log_struct(LOG_ERR, | |
2b044526 | 4723 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4724 | LOG_UNIT_ID(u), |
f1c50bec | 4725 | LOG_UNIT_INVOCATION_ID(u), |
8b4305c7 LP |
4726 | LOG_UNIT_MESSAGE(u, "Mount on symlink %s not allowed.", where), |
4727 | "WHERE=%s", where, | |
4728 | NULL); | |
4729 | ||
4730 | return -ELOOP; | |
4731 | } | |
0f13f3bd LP |
4732 | |
4733 | bool unit_is_pristine(Unit *u) { | |
4734 | assert(u); | |
4735 | ||
7c65093a | 4736 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
4737 | * in a number of different ways. Note that to cater for unit |
4738 | * types such as slice, we are generally fine with units that | |
61233823 | 4739 | * are marked UNIT_LOADED even though nothing was |
0f13f3bd LP |
4740 | * actually loaded, as those unit types don't require a file |
4741 | * on disk to validly load. */ | |
4742 | ||
4743 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
4744 | u->fragment_path || | |
4745 | u->source_path || | |
4746 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
4747 | u->job || |
4748 | u->merged_into); | |
4749 | } | |
291d565a LP |
4750 | |
4751 | pid_t unit_control_pid(Unit *u) { | |
4752 | assert(u); | |
4753 | ||
4754 | if (UNIT_VTABLE(u)->control_pid) | |
4755 | return UNIT_VTABLE(u)->control_pid(u); | |
4756 | ||
4757 | return 0; | |
4758 | } | |
4759 | ||
4760 | pid_t unit_main_pid(Unit *u) { | |
4761 | assert(u); | |
4762 | ||
4763 | if (UNIT_VTABLE(u)->main_pid) | |
4764 | return UNIT_VTABLE(u)->main_pid(u); | |
4765 | ||
4766 | return 0; | |
4767 | } | |
00d9ef85 LP |
4768 | |
4769 | static void unit_unref_uid_internal( | |
4770 | Unit *u, | |
4771 | uid_t *ref_uid, | |
4772 | bool destroy_now, | |
4773 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
4774 | ||
4775 | assert(u); | |
4776 | assert(ref_uid); | |
4777 | assert(_manager_unref_uid); | |
4778 | ||
4779 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
4780 | * gid_t are actually the same time, with the same validity rules. | |
4781 | * | |
4782 | * Drops a reference to UID/GID from a unit. */ | |
4783 | ||
4784 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4785 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4786 | ||
4787 | if (!uid_is_valid(*ref_uid)) | |
4788 | return; | |
4789 | ||
4790 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
4791 | *ref_uid = UID_INVALID; | |
4792 | } | |
4793 | ||
4794 | void unit_unref_uid(Unit *u, bool destroy_now) { | |
4795 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); | |
4796 | } | |
4797 | ||
4798 | void unit_unref_gid(Unit *u, bool destroy_now) { | |
4799 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); | |
4800 | } | |
4801 | ||
4802 | static int unit_ref_uid_internal( | |
4803 | Unit *u, | |
4804 | uid_t *ref_uid, | |
4805 | uid_t uid, | |
4806 | bool clean_ipc, | |
4807 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
4808 | ||
4809 | int r; | |
4810 | ||
4811 | assert(u); | |
4812 | assert(ref_uid); | |
4813 | assert(uid_is_valid(uid)); | |
4814 | assert(_manager_ref_uid); | |
4815 | ||
4816 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
4817 | * are actually the same type, and have the same validity rules. | |
4818 | * | |
4819 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
4820 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
4821 | * drops to zero. */ | |
4822 | ||
4823 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4824 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4825 | ||
4826 | if (*ref_uid == uid) | |
4827 | return 0; | |
4828 | ||
4829 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
4830 | return -EBUSY; | |
4831 | ||
4832 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
4833 | if (r < 0) | |
4834 | return r; | |
4835 | ||
4836 | *ref_uid = uid; | |
4837 | return 1; | |
4838 | } | |
4839 | ||
4840 | int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { | |
4841 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); | |
4842 | } | |
4843 | ||
4844 | int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { | |
4845 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); | |
4846 | } | |
4847 | ||
4848 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
4849 | int r = 0, q = 0; | |
4850 | ||
4851 | assert(u); | |
4852 | ||
4853 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
4854 | ||
4855 | if (uid_is_valid(uid)) { | |
4856 | r = unit_ref_uid(u, uid, clean_ipc); | |
4857 | if (r < 0) | |
4858 | return r; | |
4859 | } | |
4860 | ||
4861 | if (gid_is_valid(gid)) { | |
4862 | q = unit_ref_gid(u, gid, clean_ipc); | |
4863 | if (q < 0) { | |
4864 | if (r > 0) | |
4865 | unit_unref_uid(u, false); | |
4866 | ||
4867 | return q; | |
4868 | } | |
4869 | } | |
4870 | ||
4871 | return r > 0 || q > 0; | |
4872 | } | |
4873 | ||
4874 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
4875 | ExecContext *c; | |
4876 | int r; | |
4877 | ||
4878 | assert(u); | |
4879 | ||
4880 | c = unit_get_exec_context(u); | |
4881 | ||
4882 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
4883 | if (r < 0) | |
4884 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
4885 | ||
4886 | return r; | |
4887 | } | |
4888 | ||
4889 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { | |
4890 | assert(u); | |
4891 | ||
4892 | unit_unref_uid(u, destroy_now); | |
4893 | unit_unref_gid(u, destroy_now); | |
4894 | } | |
4895 | ||
4896 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { | |
4897 | int r; | |
4898 | ||
4899 | assert(u); | |
4900 | ||
4901 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
4902 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
4903 | * objects when no service references the UID/GID anymore. */ | |
4904 | ||
4905 | r = unit_ref_uid_gid(u, uid, gid); | |
4906 | if (r > 0) | |
4907 | bus_unit_send_change_signal(u); | |
4908 | } | |
4b58153d LP |
4909 | |
4910 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { | |
4911 | int r; | |
4912 | ||
4913 | assert(u); | |
4914 | ||
4915 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
4916 | ||
4917 | if (sd_id128_equal(u->invocation_id, id)) | |
4918 | return 0; | |
4919 | ||
4920 | if (!sd_id128_is_null(u->invocation_id)) | |
4921 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
4922 | ||
4923 | if (sd_id128_is_null(id)) { | |
4924 | r = 0; | |
4925 | goto reset; | |
4926 | } | |
4927 | ||
4928 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
4929 | if (r < 0) | |
4930 | goto reset; | |
4931 | ||
4932 | u->invocation_id = id; | |
4933 | sd_id128_to_string(id, u->invocation_id_string); | |
4934 | ||
4935 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
4936 | if (r < 0) | |
4937 | goto reset; | |
4938 | ||
4939 | return 0; | |
4940 | ||
4941 | reset: | |
4942 | u->invocation_id = SD_ID128_NULL; | |
4943 | u->invocation_id_string[0] = 0; | |
4944 | return r; | |
4945 | } | |
4946 | ||
4947 | int unit_acquire_invocation_id(Unit *u) { | |
4948 | sd_id128_t id; | |
4949 | int r; | |
4950 | ||
4951 | assert(u); | |
4952 | ||
4953 | r = sd_id128_randomize(&id); | |
4954 | if (r < 0) | |
4955 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
4956 | ||
4957 | r = unit_set_invocation_id(u, id); | |
4958 | if (r < 0) | |
4959 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
4960 | ||
4961 | return 0; | |
4962 | } | |
f0d47797 | 4963 | |
7960b0c7 LP |
4964 | void unit_set_exec_params(Unit *u, ExecParameters *p) { |
4965 | assert(u); | |
4966 | assert(p); | |
f0d47797 | 4967 | |
7960b0c7 | 4968 | p->cgroup_path = u->cgroup_path; |
2e4025c0 | 4969 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, UNIT_CGROUP_BOOL(u, delegate)); |
f0d47797 | 4970 | } |
a79279c7 | 4971 | |
4c253ed1 | 4972 | int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) { |
a79279c7 LP |
4973 | int r; |
4974 | ||
4975 | assert(u); | |
4976 | assert(ret); | |
4977 | ||
4978 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
4979 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
4980 | ||
4981 | (void) unit_realize_cgroup(u); | |
4982 | ||
4c253ed1 LP |
4983 | r = safe_fork(name, FORK_REOPEN_LOG, ret); |
4984 | if (r != 0) | |
4985 | return r; | |
a79279c7 | 4986 | |
4c253ed1 LP |
4987 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); |
4988 | (void) ignore_signals(SIGPIPE, -1); | |
a79279c7 | 4989 | |
4c253ed1 | 4990 | (void) prctl(PR_SET_PDEATHSIG, SIGTERM); |
a79279c7 | 4991 | |
4c253ed1 LP |
4992 | if (u->cgroup_path) { |
4993 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
4994 | if (r < 0) { | |
4995 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", u->cgroup_path); | |
4996 | _exit(EXIT_CGROUP); | |
a79279c7 | 4997 | } |
a79279c7 LP |
4998 | } |
4999 | ||
4c253ed1 | 5000 | return 0; |
a79279c7 | 5001 | } |
c999cf38 LP |
5002 | |
5003 | static void unit_update_dependency_mask(Unit *u, UnitDependency d, Unit *other, UnitDependencyInfo di) { | |
5004 | assert(u); | |
5005 | assert(d >= 0); | |
5006 | assert(d < _UNIT_DEPENDENCY_MAX); | |
5007 | assert(other); | |
5008 | ||
5009 | if (di.origin_mask == 0 && di.destination_mask == 0) { | |
5010 | /* No bit set anymore, let's drop the whole entry */ | |
5011 | assert_se(hashmap_remove(u->dependencies[d], other)); | |
5012 | log_unit_debug(u, "%s lost dependency %s=%s", u->id, unit_dependency_to_string(d), other->id); | |
5013 | } else | |
5014 | /* Mask was reduced, let's update the entry */ | |
5015 | assert_se(hashmap_update(u->dependencies[d], other, di.data) == 0); | |
5016 | } | |
5017 | ||
5018 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
5019 | UnitDependency d; | |
5020 | ||
5021 | assert(u); | |
5022 | ||
5023 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5024 | ||
5025 | if (mask == 0) | |
5026 | return; | |
5027 | ||
5028 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
5029 | bool done; | |
5030 | ||
5031 | do { | |
5032 | UnitDependencyInfo di; | |
5033 | Unit *other; | |
5034 | Iterator i; | |
5035 | ||
5036 | done = true; | |
5037 | ||
5038 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { | |
5039 | UnitDependency q; | |
5040 | ||
5041 | if ((di.origin_mask & ~mask) == di.origin_mask) | |
5042 | continue; | |
5043 | di.origin_mask &= ~mask; | |
5044 | unit_update_dependency_mask(u, d, other, di); | |
5045 | ||
5046 | /* We updated the dependency from our unit to the other unit now. But most dependencies | |
5047 | * imply a reverse dependency. Hence, let's delete that one too. For that we go through | |
5048 | * all dependency types on the other unit and delete all those which point to us and | |
5049 | * have the right mask set. */ | |
5050 | ||
5051 | for (q = 0; q < _UNIT_DEPENDENCY_MAX; q++) { | |
5052 | UnitDependencyInfo dj; | |
5053 | ||
5054 | dj.data = hashmap_get(other->dependencies[q], u); | |
5055 | if ((dj.destination_mask & ~mask) == dj.destination_mask) | |
5056 | continue; | |
5057 | dj.destination_mask &= ~mask; | |
5058 | ||
5059 | unit_update_dependency_mask(other, q, u, dj); | |
5060 | } | |
5061 | ||
5062 | unit_add_to_gc_queue(other); | |
5063 | ||
5064 | done = false; | |
5065 | break; | |
5066 | } | |
5067 | ||
5068 | } while (!done); | |
5069 | } | |
5070 | } | |
d3070fbd LP |
5071 | |
5072 | static int unit_export_invocation_id(Unit *u) { | |
5073 | const char *p; | |
5074 | int r; | |
5075 | ||
5076 | assert(u); | |
5077 | ||
5078 | if (u->exported_invocation_id) | |
5079 | return 0; | |
5080 | ||
5081 | if (sd_id128_is_null(u->invocation_id)) | |
5082 | return 0; | |
5083 | ||
5084 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
5085 | r = symlink_atomic(u->invocation_id_string, p); | |
5086 | if (r < 0) | |
5087 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5088 | ||
5089 | u->exported_invocation_id = true; | |
5090 | return 0; | |
5091 | } | |
5092 | ||
5093 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5094 | const char *p; | |
5095 | char buf[2]; | |
5096 | int r; | |
5097 | ||
5098 | assert(u); | |
5099 | assert(c); | |
5100 | ||
5101 | if (u->exported_log_level_max) | |
5102 | return 0; | |
5103 | ||
5104 | if (c->log_level_max < 0) | |
5105 | return 0; | |
5106 | ||
5107 | assert(c->log_level_max <= 7); | |
5108 | ||
5109 | buf[0] = '0' + c->log_level_max; | |
5110 | buf[1] = 0; | |
5111 | ||
5112 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5113 | r = symlink_atomic(buf, p); | |
5114 | if (r < 0) | |
5115 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5116 | ||
5117 | u->exported_log_level_max = true; | |
5118 | return 0; | |
5119 | } | |
5120 | ||
5121 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5122 | _cleanup_close_ int fd = -1; | |
5123 | struct iovec *iovec; | |
5124 | const char *p; | |
5125 | char *pattern; | |
5126 | le64_t *sizes; | |
5127 | ssize_t n; | |
5128 | size_t i; | |
5129 | int r; | |
5130 | ||
5131 | if (u->exported_log_extra_fields) | |
5132 | return 0; | |
5133 | ||
5134 | if (c->n_log_extra_fields <= 0) | |
5135 | return 0; | |
5136 | ||
5137 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5138 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5139 | ||
5140 | for (i = 0; i < c->n_log_extra_fields; i++) { | |
5141 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); | |
5142 | ||
5143 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5144 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5145 | } | |
5146 | ||
5147 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5148 | pattern = strjoina(p, ".XXXXXX"); | |
5149 | ||
5150 | fd = mkostemp_safe(pattern); | |
5151 | if (fd < 0) | |
5152 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5153 | ||
5154 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5155 | if (n < 0) { | |
5156 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5157 | goto fail; | |
5158 | } | |
5159 | ||
5160 | (void) fchmod(fd, 0644); | |
5161 | ||
5162 | if (rename(pattern, p) < 0) { | |
5163 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5164 | goto fail; | |
5165 | } | |
5166 | ||
5167 | u->exported_log_extra_fields = true; | |
5168 | return 0; | |
5169 | ||
5170 | fail: | |
5171 | (void) unlink(pattern); | |
5172 | return r; | |
5173 | } | |
5174 | ||
5175 | void unit_export_state_files(Unit *u) { | |
5176 | const ExecContext *c; | |
5177 | ||
5178 | assert(u); | |
5179 | ||
5180 | if (!u->id) | |
5181 | return; | |
5182 | ||
5183 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5184 | return; | |
5185 | ||
5186 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data | |
5187 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5188 | * the IPC system itself and PID 1 also log to the journal. | |
5189 | * | |
5190 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5191 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5192 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5193 | * namespace at least. | |
5194 | * | |
5195 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5196 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5197 | * them with one. */ | |
5198 | ||
5199 | (void) unit_export_invocation_id(u); | |
5200 | ||
5201 | c = unit_get_exec_context(u); | |
5202 | if (c) { | |
5203 | (void) unit_export_log_level_max(u, c); | |
5204 | (void) unit_export_log_extra_fields(u, c); | |
5205 | } | |
5206 | } | |
5207 | ||
5208 | void unit_unlink_state_files(Unit *u) { | |
5209 | const char *p; | |
5210 | ||
5211 | assert(u); | |
5212 | ||
5213 | if (!u->id) | |
5214 | return; | |
5215 | ||
5216 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5217 | return; | |
5218 | ||
5219 | /* Undoes the effect of unit_export_state() */ | |
5220 | ||
5221 | if (u->exported_invocation_id) { | |
5222 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
5223 | (void) unlink(p); | |
5224 | ||
5225 | u->exported_invocation_id = false; | |
5226 | } | |
5227 | ||
5228 | if (u->exported_log_level_max) { | |
5229 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5230 | (void) unlink(p); | |
5231 | ||
5232 | u->exported_log_level_max = false; | |
5233 | } | |
5234 | ||
5235 | if (u->exported_log_extra_fields) { | |
5236 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5237 | (void) unlink(p); | |
5238 | ||
5239 | u->exported_log_extra_fields = false; | |
5240 | } | |
5241 | } | |
5afe510c | 5242 | |
3c7416b6 LP |
5243 | int unit_prepare_exec(Unit *u) { |
5244 | int r; | |
5245 | ||
5246 | assert(u); | |
5247 | ||
5248 | /* Prepares everything so that we can fork of a process for this unit */ | |
5249 | ||
5250 | (void) unit_realize_cgroup(u); | |
5251 | ||
5252 | if (u->reset_accounting) { | |
5253 | (void) unit_reset_cpu_accounting(u); | |
5254 | (void) unit_reset_ip_accounting(u); | |
5255 | u->reset_accounting = false; | |
5256 | } | |
5257 | ||
5258 | unit_export_state_files(u); | |
5259 | ||
5260 | r = unit_setup_exec_runtime(u); | |
5261 | if (r < 0) | |
5262 | return r; | |
5263 | ||
5264 | r = unit_setup_dynamic_creds(u); | |
5265 | if (r < 0) | |
5266 | return r; | |
5267 | ||
5268 | return 0; | |
5269 | } | |
5270 | ||
a4634b21 LP |
5271 | static void log_leftover(pid_t pid, int sig, void *userdata) { |
5272 | _cleanup_free_ char *comm = NULL; | |
5273 | ||
5274 | (void) get_process_comm(pid, &comm); | |
5275 | ||
5276 | if (comm && comm[0] == '(') /* Most likely our own helper process (PAM?), ignore */ | |
5277 | return; | |
5278 | ||
5279 | log_unit_warning(userdata, | |
5280 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5281 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5282 | pid, strna(comm)); | |
5283 | } | |
5284 | ||
5285 | void unit_warn_leftover_processes(Unit *u) { | |
5286 | assert(u); | |
5287 | ||
5288 | (void) unit_pick_cgroup_path(u); | |
5289 | ||
5290 | if (!u->cgroup_path) | |
5291 | return; | |
5292 | ||
5293 | (void) cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_leftover, u); | |
5294 | } | |
5295 | ||
5afe510c LP |
5296 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
5297 | [COLLECT_INACTIVE] = "inactive", | |
5298 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
5299 | }; | |
5300 | ||
5301 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); |