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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 | |
a7334b09 LP |
6 | ***/ |
7 | ||
87f0e418 | 8 | #include <errno.h> |
0301abf4 | 9 | #include <stdlib.h> |
4f5dd394 | 10 | #include <string.h> |
4c253ed1 | 11 | #include <sys/prctl.h> |
45fb0699 | 12 | #include <sys/stat.h> |
4f5dd394 | 13 | #include <unistd.h> |
87f0e418 | 14 | |
718db961 LP |
15 | #include "sd-id128.h" |
16 | #include "sd-messages.h" | |
4f5dd394 | 17 | |
b5efdb8a | 18 | #include "alloc-util.h" |
57b7a260 | 19 | #include "all-units.h" |
4f5dd394 LP |
20 | #include "bus-common-errors.h" |
21 | #include "bus-util.h" | |
c6c18be3 | 22 | #include "cgroup-util.h" |
4f5dd394 LP |
23 | #include "dbus-unit.h" |
24 | #include "dbus.h" | |
25 | #include "dropin.h" | |
26 | #include "escape.h" | |
27 | #include "execute.h" | |
6a48d82f | 28 | #include "fd-util.h" |
a5c32cff | 29 | #include "fileio-label.h" |
f97b34a6 | 30 | #include "format-util.h" |
d3070fbd | 31 | #include "fs-util.h" |
4b58153d | 32 | #include "id128-util.h" |
915b1d01 | 33 | #include "io-util.h" |
4f5dd394 LP |
34 | #include "load-dropin.h" |
35 | #include "load-fragment.h" | |
36 | #include "log.h" | |
37 | #include "macro.h" | |
38 | #include "missing.h" | |
39 | #include "mkdir.h" | |
6bedfcbb | 40 | #include "parse-util.h" |
4f5dd394 | 41 | #include "path-util.h" |
0b452006 | 42 | #include "process-util.h" |
4f5dd394 | 43 | #include "set.h" |
6eb7c172 | 44 | #include "signal-util.h" |
d3070fbd | 45 | #include "sparse-endian.h" |
e9db43d5 | 46 | #include "special.h" |
2e59b241 | 47 | #include "specifier.h" |
8fcde012 | 48 | #include "stat-util.h" |
d054f0a4 | 49 | #include "stdio-util.h" |
5afe510c | 50 | #include "string-table.h" |
07630cea | 51 | #include "string-util.h" |
4f5dd394 | 52 | #include "strv.h" |
4f4afc88 | 53 | #include "umask-util.h" |
4f5dd394 | 54 | #include "unit-name.h" |
e9db43d5 | 55 | #include "unit.h" |
b1d4f8e1 LP |
56 | #include "user-util.h" |
57 | #include "virt.h" | |
87f0e418 LP |
58 | |
59 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
60 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 LP |
61 | [UNIT_SOCKET] = &socket_vtable, |
62 | [UNIT_TARGET] = &target_vtable, | |
63 | [UNIT_DEVICE] = &device_vtable, | |
64 | [UNIT_MOUNT] = &mount_vtable, | |
65 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 66 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 67 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 68 | [UNIT_PATH] = &path_vtable, |
6c12b52e | 69 | [UNIT_SLICE] = &slice_vtable, |
5afe510c | 70 | [UNIT_SCOPE] = &scope_vtable, |
87f0e418 LP |
71 | }; |
72 | ||
f2341e0a | 73 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 74 | |
7d17cfbc | 75 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
76 | Unit *u; |
77 | ||
78 | assert(m); | |
ac155bb8 | 79 | assert(size >= sizeof(Unit)); |
87f0e418 | 80 | |
7d17cfbc MS |
81 | u = malloc0(size); |
82 | if (!u) | |
87f0e418 LP |
83 | return NULL; |
84 | ||
d5099efc | 85 | u->names = set_new(&string_hash_ops); |
6b430fdb ZJS |
86 | if (!u->names) |
87 | return mfree(u); | |
87f0e418 | 88 | |
ac155bb8 MS |
89 | u->manager = m; |
90 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
91 | u->default_dependencies = true; |
92 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 93 | u->unit_file_preset = -1; |
d420282b | 94 | u->on_failure_job_mode = JOB_REPLACE; |
efdb0237 | 95 | u->cgroup_inotify_wd = -1; |
36c16a7c | 96 | u->job_timeout = USEC_INFINITY; |
a2df3ea4 | 97 | u->job_running_timeout = USEC_INFINITY; |
00d9ef85 LP |
98 | u->ref_uid = UID_INVALID; |
99 | u->ref_gid = GID_INVALID; | |
fe700f46 | 100 | u->cpu_usage_last = NSEC_INFINITY; |
60c728ad | 101 | u->cgroup_bpf_state = UNIT_CGROUP_BPF_INVALIDATED; |
87f0e418 | 102 | |
6a48d82f DM |
103 | u->ip_accounting_ingress_map_fd = -1; |
104 | u->ip_accounting_egress_map_fd = -1; | |
105 | u->ipv4_allow_map_fd = -1; | |
106 | u->ipv6_allow_map_fd = -1; | |
107 | u->ipv4_deny_map_fd = -1; | |
108 | u->ipv6_deny_map_fd = -1; | |
109 | ||
2e59b241 LP |
110 | u->last_section_private = -1; |
111 | ||
6bf0f408 | 112 | RATELIMIT_INIT(u->start_limit, m->default_start_limit_interval, m->default_start_limit_burst); |
67bfdc97 | 113 | RATELIMIT_INIT(u->auto_stop_ratelimit, 10 * USEC_PER_SEC, 16); |
bea355da | 114 | |
87f0e418 LP |
115 | return u; |
116 | } | |
117 | ||
a581e45a | 118 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
dc409696 | 119 | _cleanup_(unit_freep) Unit *u = NULL; |
a581e45a LP |
120 | int r; |
121 | ||
122 | u = unit_new(m, size); | |
123 | if (!u) | |
124 | return -ENOMEM; | |
125 | ||
126 | r = unit_add_name(u, name); | |
dc409696 | 127 | if (r < 0) |
a581e45a | 128 | return r; |
a581e45a | 129 | |
1cc6c93a YW |
130 | *ret = TAKE_PTR(u); |
131 | ||
a581e45a LP |
132 | return r; |
133 | } | |
134 | ||
f278026d LP |
135 | bool unit_has_name(Unit *u, const char *name) { |
136 | assert(u); | |
137 | assert(name); | |
138 | ||
390bc2b1 | 139 | return set_contains(u->names, (char*) name); |
f278026d LP |
140 | } |
141 | ||
598459ce LP |
142 | static void unit_init(Unit *u) { |
143 | CGroupContext *cc; | |
144 | ExecContext *ec; | |
145 | KillContext *kc; | |
146 | ||
147 | assert(u); | |
148 | assert(u->manager); | |
149 | assert(u->type >= 0); | |
150 | ||
151 | cc = unit_get_cgroup_context(u); | |
152 | if (cc) { | |
153 | cgroup_context_init(cc); | |
154 | ||
155 | /* Copy in the manager defaults into the cgroup | |
156 | * context, _before_ the rest of the settings have | |
157 | * been initialized */ | |
158 | ||
159 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
13c31542 | 160 | cc->io_accounting = u->manager->default_io_accounting; |
377bfd2d | 161 | cc->ip_accounting = u->manager->default_ip_accounting; |
598459ce LP |
162 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
163 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 164 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
6a48d82f | 165 | cc->ip_accounting = u->manager->default_ip_accounting; |
0af20ea2 LP |
166 | |
167 | if (u->type != UNIT_SLICE) | |
168 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
169 | } |
170 | ||
171 | ec = unit_get_exec_context(u); | |
b1edf445 | 172 | if (ec) { |
598459ce LP |
173 | exec_context_init(ec); |
174 | ||
b1edf445 | 175 | ec->keyring_mode = MANAGER_IS_SYSTEM(u->manager) ? |
00f5ad93 | 176 | EXEC_KEYRING_SHARED : EXEC_KEYRING_INHERIT; |
b1edf445 LP |
177 | } |
178 | ||
598459ce LP |
179 | kc = unit_get_kill_context(u); |
180 | if (kc) | |
181 | kill_context_init(kc); | |
182 | ||
183 | if (UNIT_VTABLE(u)->init) | |
184 | UNIT_VTABLE(u)->init(u); | |
185 | } | |
186 | ||
87f0e418 | 187 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 188 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 189 | UnitType t; |
87f0e418 LP |
190 | int r; |
191 | ||
192 | assert(u); | |
193 | assert(text); | |
194 | ||
7410616c | 195 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 196 | |
ac155bb8 | 197 | if (!u->instance) |
9e2f7c11 | 198 | return -EINVAL; |
87f0e418 | 199 | |
7410616c LP |
200 | r = unit_name_replace_instance(text, u->instance, &s); |
201 | if (r < 0) | |
202 | return r; | |
203 | } else { | |
9e2f7c11 | 204 | s = strdup(text); |
7410616c LP |
205 | if (!s) |
206 | return -ENOMEM; | |
207 | } | |
87f0e418 | 208 | |
7410616c LP |
209 | if (set_contains(u->names, s)) |
210 | return 0; | |
211 | if (hashmap_contains(u->manager->units, s)) | |
212 | return -EEXIST; | |
213 | ||
214 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 215 | return -EINVAL; |
e537352b | 216 | |
7410616c LP |
217 | t = unit_name_to_type(s); |
218 | if (t < 0) | |
219 | return -EINVAL; | |
87f0e418 | 220 | |
598459ce LP |
221 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
222 | return -EINVAL; | |
87f0e418 | 223 | |
e48614c4 ZJS |
224 | r = unit_name_to_instance(s, &i); |
225 | if (r < 0) | |
598459ce | 226 | return r; |
87f0e418 | 227 | |
ce99c68a | 228 | if (i && !unit_type_may_template(t)) |
598459ce | 229 | return -EINVAL; |
9e2f7c11 | 230 | |
276c3e78 | 231 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
232 | * but not both. Note that we do allow names with different |
233 | * instance names however! */ | |
598459ce LP |
234 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
235 | return -EINVAL; | |
9e2f7c11 | 236 | |
8a993b61 | 237 | if (!unit_type_may_alias(t) && !set_isempty(u->names)) |
598459ce | 238 | return -EEXIST; |
9e2f7c11 | 239 | |
598459ce LP |
240 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
241 | return -E2BIG; | |
4f0f902f | 242 | |
e48614c4 | 243 | r = set_put(u->names, s); |
7410616c | 244 | if (r < 0) |
598459ce | 245 | return r; |
7410616c | 246 | assert(r > 0); |
87f0e418 | 247 | |
e48614c4 ZJS |
248 | r = hashmap_put(u->manager->units, s, u); |
249 | if (r < 0) { | |
7410616c | 250 | (void) set_remove(u->names, s); |
598459ce | 251 | return r; |
87f0e418 LP |
252 | } |
253 | ||
ac155bb8 | 254 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
255 | u->type = t; |
256 | u->id = s; | |
1cc6c93a | 257 | u->instance = TAKE_PTR(i); |
9e2f7c11 | 258 | |
71fda00f | 259 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 260 | |
598459ce | 261 | unit_init(u); |
598459ce | 262 | } |
9e2f7c11 | 263 | |
598459ce | 264 | s = NULL; |
9e2f7c11 | 265 | |
598459ce LP |
266 | unit_add_to_dbus_queue(u); |
267 | return 0; | |
87f0e418 LP |
268 | } |
269 | ||
0ae97ec1 | 270 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 271 | _cleanup_free_ char *t = NULL; |
598459ce | 272 | char *s, *i; |
276c3e78 | 273 | int r; |
0ae97ec1 LP |
274 | |
275 | assert(u); | |
276 | assert(name); | |
277 | ||
7410616c | 278 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 279 | |
ac155bb8 | 280 | if (!u->instance) |
9e2f7c11 LP |
281 | return -EINVAL; |
282 | ||
7410616c LP |
283 | r = unit_name_replace_instance(name, u->instance, &t); |
284 | if (r < 0) | |
285 | return r; | |
9e2f7c11 LP |
286 | |
287 | name = t; | |
288 | } | |
289 | ||
0ae97ec1 | 290 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 291 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 292 | if (!s) |
0ae97ec1 LP |
293 | return -ENOENT; |
294 | ||
7410616c | 295 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
296 | r = unit_name_to_instance(s, &i); |
297 | if (r < 0) | |
276c3e78 LP |
298 | return r; |
299 | ||
ac155bb8 | 300 | u->id = s; |
276c3e78 | 301 | |
ac155bb8 MS |
302 | free(u->instance); |
303 | u->instance = i; | |
276c3e78 | 304 | |
c1e1601e | 305 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 306 | |
0ae97ec1 LP |
307 | return 0; |
308 | } | |
309 | ||
f50e0a01 | 310 | int unit_set_description(Unit *u, const char *description) { |
84b26d51 | 311 | int r; |
f50e0a01 LP |
312 | |
313 | assert(u); | |
314 | ||
84b26d51 LP |
315 | r = free_and_strdup(&u->description, empty_to_null(description)); |
316 | if (r < 0) | |
317 | return r; | |
318 | if (r > 0) | |
319 | unit_add_to_dbus_queue(u); | |
c1e1601e | 320 | |
f50e0a01 LP |
321 | return 0; |
322 | } | |
323 | ||
f2f725e5 | 324 | bool unit_may_gc(Unit *u) { |
a354329f | 325 | UnitActiveState state; |
e98b2fbb | 326 | int r; |
5afe510c | 327 | |
701cc384 LP |
328 | assert(u); |
329 | ||
f2f725e5 ZJS |
330 | /* Checks whether the unit is ready to be unloaded for garbage collection. |
331 | * Returns true when the unit may be collected, and false if there's some | |
2641f02e ZJS |
332 | * reason to keep it loaded. |
333 | * | |
334 | * References from other units are *not* checked here. Instead, this is done | |
335 | * in unit_gc_sweep(), but using markers to properly collect dependency loops. | |
336 | */ | |
5afe510c | 337 | |
a354329f | 338 | if (u->job) |
f2f725e5 | 339 | return false; |
701cc384 | 340 | |
a354329f | 341 | if (u->nop_job) |
f2f725e5 | 342 | return false; |
6c073082 | 343 | |
a354329f LP |
344 | state = unit_active_state(u); |
345 | ||
7eb2a8a1 | 346 | /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */ |
a354329f LP |
347 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && |
348 | UNIT_VTABLE(u)->release_resources) | |
7eb2a8a1 | 349 | UNIT_VTABLE(u)->release_resources(u); |
a354329f | 350 | |
f5869324 | 351 | if (u->perpetual) |
f2f725e5 | 352 | return false; |
9d576438 | 353 | |
05a98afd | 354 | if (sd_bus_track_count(u->bus_track) > 0) |
f2f725e5 | 355 | return false; |
05a98afd | 356 | |
5afe510c LP |
357 | /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */ |
358 | switch (u->collect_mode) { | |
359 | ||
360 | case COLLECT_INACTIVE: | |
361 | if (state != UNIT_INACTIVE) | |
f2f725e5 | 362 | return false; |
5afe510c LP |
363 | |
364 | break; | |
365 | ||
366 | case COLLECT_INACTIVE_OR_FAILED: | |
367 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
f2f725e5 | 368 | return false; |
5afe510c LP |
369 | |
370 | break; | |
371 | ||
372 | default: | |
373 | assert_not_reached("Unknown garbage collection mode"); | |
374 | } | |
375 | ||
e98b2fbb LP |
376 | if (u->cgroup_path) { |
377 | /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay | |
378 | * around. Units with active processes should never be collected. */ | |
379 | ||
380 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
381 | if (r < 0) | |
382 | log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", u->cgroup_path); | |
383 | if (r <= 0) | |
f2f725e5 | 384 | return false; |
e98b2fbb LP |
385 | } |
386 | ||
f2f725e5 ZJS |
387 | if (UNIT_VTABLE(u)->may_gc && !UNIT_VTABLE(u)->may_gc(u)) |
388 | return false; | |
701cc384 | 389 | |
f2f725e5 | 390 | return true; |
701cc384 LP |
391 | } |
392 | ||
87f0e418 LP |
393 | void unit_add_to_load_queue(Unit *u) { |
394 | assert(u); | |
ac155bb8 | 395 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 396 | |
ac155bb8 | 397 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
398 | return; |
399 | ||
71fda00f | 400 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 401 | u->in_load_queue = true; |
87f0e418 LP |
402 | } |
403 | ||
23a177ef LP |
404 | void unit_add_to_cleanup_queue(Unit *u) { |
405 | assert(u); | |
406 | ||
ac155bb8 | 407 | if (u->in_cleanup_queue) |
23a177ef LP |
408 | return; |
409 | ||
71fda00f | 410 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 411 | u->in_cleanup_queue = true; |
23a177ef LP |
412 | } |
413 | ||
701cc384 LP |
414 | void unit_add_to_gc_queue(Unit *u) { |
415 | assert(u); | |
416 | ||
ac155bb8 | 417 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
418 | return; |
419 | ||
f2f725e5 | 420 | if (!unit_may_gc(u)) |
701cc384 LP |
421 | return; |
422 | ||
c5a97ed1 | 423 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 424 | u->in_gc_queue = true; |
701cc384 LP |
425 | } |
426 | ||
c1e1601e LP |
427 | void unit_add_to_dbus_queue(Unit *u) { |
428 | assert(u); | |
ac155bb8 | 429 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 430 | |
ac155bb8 | 431 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
432 | return; |
433 | ||
a567261a | 434 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 435 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 436 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 437 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 438 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
439 | return; |
440 | } | |
441 | ||
71fda00f | 442 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 443 | u->in_dbus_queue = true; |
c1e1601e LP |
444 | } |
445 | ||
eef85c4a | 446 | static void bidi_set_free(Unit *u, Hashmap *h) { |
87f0e418 | 447 | Unit *other; |
eef85c4a LP |
448 | Iterator i; |
449 | void *v; | |
87f0e418 LP |
450 | |
451 | assert(u); | |
452 | ||
eef85c4a | 453 | /* Frees the hashmap and makes sure we are dropped from the inverse pointers */ |
87f0e418 | 454 | |
eef85c4a | 455 | HASHMAP_FOREACH_KEY(v, other, h, i) { |
87f0e418 LP |
456 | UnitDependency d; |
457 | ||
458 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
eef85c4a | 459 | hashmap_remove(other->dependencies[d], u); |
701cc384 LP |
460 | |
461 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
462 | } |
463 | ||
eef85c4a | 464 | hashmap_free(h); |
87f0e418 LP |
465 | } |
466 | ||
c2756a68 LP |
467 | static void unit_remove_transient(Unit *u) { |
468 | char **i; | |
469 | ||
470 | assert(u); | |
471 | ||
472 | if (!u->transient) | |
473 | return; | |
474 | ||
475 | if (u->fragment_path) | |
3f5e8115 | 476 | (void) unlink(u->fragment_path); |
c2756a68 LP |
477 | |
478 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 479 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 480 | |
39591351 LP |
481 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
482 | if (!p) | |
483 | continue; | |
484 | ||
485 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
486 | if (!pp) | |
487 | continue; | |
488 | ||
489 | /* Only drop transient drop-ins */ | |
490 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
491 | continue; | |
c2756a68 | 492 | |
39591351 LP |
493 | (void) unlink(*i); |
494 | (void) rmdir(p); | |
c2756a68 LP |
495 | } |
496 | } | |
497 | ||
a57f7e2c | 498 | static void unit_free_requires_mounts_for(Unit *u) { |
eef85c4a | 499 | assert(u); |
a57f7e2c | 500 | |
eef85c4a LP |
501 | for (;;) { |
502 | _cleanup_free_ char *path; | |
a57f7e2c | 503 | |
eef85c4a LP |
504 | path = hashmap_steal_first_key(u->requires_mounts_for); |
505 | if (!path) | |
506 | break; | |
507 | else { | |
508 | char s[strlen(path) + 1]; | |
a57f7e2c | 509 | |
eef85c4a LP |
510 | PATH_FOREACH_PREFIX_MORE(s, path) { |
511 | char *y; | |
512 | Set *x; | |
513 | ||
514 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
515 | if (!x) | |
516 | continue; | |
a57f7e2c | 517 | |
eef85c4a | 518 | (void) set_remove(x, u); |
a57f7e2c | 519 | |
eef85c4a LP |
520 | if (set_isempty(x)) { |
521 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
522 | free(y); | |
523 | set_free(x); | |
524 | } | |
a57f7e2c LP |
525 | } |
526 | } | |
527 | } | |
528 | ||
eef85c4a | 529 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
a57f7e2c LP |
530 | } |
531 | ||
598459ce LP |
532 | static void unit_done(Unit *u) { |
533 | ExecContext *ec; | |
534 | CGroupContext *cc; | |
535 | ||
536 | assert(u); | |
537 | ||
538 | if (u->type < 0) | |
539 | return; | |
540 | ||
541 | if (UNIT_VTABLE(u)->done) | |
542 | UNIT_VTABLE(u)->done(u); | |
543 | ||
544 | ec = unit_get_exec_context(u); | |
545 | if (ec) | |
546 | exec_context_done(ec); | |
547 | ||
548 | cc = unit_get_cgroup_context(u); | |
549 | if (cc) | |
550 | cgroup_context_done(cc); | |
551 | } | |
552 | ||
87f0e418 LP |
553 | void unit_free(Unit *u) { |
554 | UnitDependency d; | |
555 | Iterator i; | |
556 | char *t; | |
557 | ||
c9d5c9c0 LP |
558 | if (!u) |
559 | return; | |
87f0e418 | 560 | |
50fb00b7 | 561 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 562 | |
2c289ea8 | 563 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
564 | unit_remove_transient(u); |
565 | ||
c1e1601e LP |
566 | bus_unit_send_removed_signal(u); |
567 | ||
598459ce | 568 | unit_done(u); |
a013b84b | 569 | |
cf9fd508 DM |
570 | sd_bus_slot_unref(u->match_bus_slot); |
571 | ||
05a98afd LP |
572 | sd_bus_track_unref(u->bus_track); |
573 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
574 | ||
a57f7e2c LP |
575 | unit_free_requires_mounts_for(u); |
576 | ||
ac155bb8 MS |
577 | SET_FOREACH(t, u->names, i) |
578 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 579 | |
4b58153d LP |
580 | if (!sd_id128_is_null(u->invocation_id)) |
581 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
582 | ||
97e7d748 MS |
583 | if (u->job) { |
584 | Job *j = u->job; | |
585 | job_uninstall(j); | |
586 | job_free(j); | |
587 | } | |
964e0949 | 588 | |
e0209d83 MS |
589 | if (u->nop_job) { |
590 | Job *j = u->nop_job; | |
591 | job_uninstall(j); | |
592 | job_free(j); | |
593 | } | |
594 | ||
964e0949 | 595 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 596 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 597 | |
adefcf28 LP |
598 | if (u->on_console) |
599 | manager_unref_console(u->manager); | |
600 | ||
efdb0237 | 601 | unit_release_cgroup(u); |
72673e86 | 602 | |
d3070fbd LP |
603 | if (!MANAGER_IS_RELOADING(u->manager)) |
604 | unit_unlink_state_files(u); | |
605 | ||
00d9ef85 LP |
606 | unit_unref_uid_gid(u, false); |
607 | ||
5269eb6b | 608 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 609 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 610 | |
a911bb9a LP |
611 | unit_unwatch_all_pids(u); |
612 | ||
702a2d8f | 613 | unit_ref_unset(&u->slice); |
7f7d01ed ZJS |
614 | while (u->refs_by_target) |
615 | unit_ref_unset(u->refs_by_target); | |
57020a3a | 616 | |
ac155bb8 | 617 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 618 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 619 | |
ac155bb8 | 620 | if (u->in_load_queue) |
71fda00f | 621 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 622 | |
ac155bb8 | 623 | if (u->in_dbus_queue) |
71fda00f | 624 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 625 | |
a2d72e26 | 626 | if (u->in_gc_queue) |
c5a97ed1 | 627 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 628 | |
91a6073e LP |
629 | if (u->in_cgroup_realize_queue) |
630 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 631 | |
09e24654 LP |
632 | if (u->in_cgroup_empty_queue) |
633 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
634 | ||
1bdf2790 ZJS |
635 | if (u->in_cleanup_queue) |
636 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
adefcf28 | 637 | |
19496554 MS |
638 | if (u->in_target_deps_queue) |
639 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
640 | ||
6a48d82f DM |
641 | safe_close(u->ip_accounting_ingress_map_fd); |
642 | safe_close(u->ip_accounting_egress_map_fd); | |
72673e86 | 643 | |
6a48d82f DM |
644 | safe_close(u->ipv4_allow_map_fd); |
645 | safe_close(u->ipv6_allow_map_fd); | |
646 | safe_close(u->ipv4_deny_map_fd); | |
647 | safe_close(u->ipv6_deny_map_fd); | |
d3070fbd | 648 | |
6a48d82f | 649 | bpf_program_unref(u->ip_bpf_ingress); |
aa2b6f1d | 650 | bpf_program_unref(u->ip_bpf_ingress_installed); |
6a48d82f | 651 | bpf_program_unref(u->ip_bpf_egress); |
aa2b6f1d | 652 | bpf_program_unref(u->ip_bpf_egress_installed); |
00d9ef85 | 653 | |
a946fa9b ZJS |
654 | condition_free_list(u->conditions); |
655 | condition_free_list(u->asserts); | |
f755e3b7 | 656 | |
ac155bb8 | 657 | free(u->description); |
49dbfa7b | 658 | strv_free(u->documentation); |
ac155bb8 | 659 | free(u->fragment_path); |
1b64d026 | 660 | free(u->source_path); |
ae7a7182 | 661 | strv_free(u->dropin_paths); |
ac155bb8 | 662 | free(u->instance); |
87f0e418 | 663 | |
f189ab18 LP |
664 | free(u->job_timeout_reboot_arg); |
665 | ||
ac155bb8 | 666 | set_free_free(u->names); |
87f0e418 | 667 | |
6bf0f408 LP |
668 | free(u->reboot_arg); |
669 | ||
87f0e418 LP |
670 | free(u); |
671 | } | |
672 | ||
673 | UnitActiveState unit_active_state(Unit *u) { | |
674 | assert(u); | |
675 | ||
ac155bb8 | 676 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
677 | return unit_active_state(unit_follow_merge(u)); |
678 | ||
679 | /* After a reload it might happen that a unit is not correctly | |
680 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 681 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
682 | |
683 | return UNIT_VTABLE(u)->active_state(u); | |
684 | } | |
685 | ||
10a94420 LP |
686 | const char* unit_sub_state_to_string(Unit *u) { |
687 | assert(u); | |
688 | ||
689 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
690 | } | |
691 | ||
eef85c4a LP |
692 | static int set_complete_move(Set **s, Set **other) { |
693 | assert(s); | |
694 | assert(other); | |
695 | ||
696 | if (!other) | |
697 | return 0; | |
698 | ||
699 | if (*s) | |
700 | return set_move(*s, *other); | |
ae2a15bc LP |
701 | else |
702 | *s = TAKE_PTR(*other); | |
7c0b05e5 | 703 | |
eef85c4a LP |
704 | return 0; |
705 | } | |
706 | ||
707 | static int hashmap_complete_move(Hashmap **s, Hashmap **other) { | |
23a177ef LP |
708 | assert(s); |
709 | assert(other); | |
87f0e418 | 710 | |
23a177ef | 711 | if (!*other) |
7c0b05e5 | 712 | return 0; |
87f0e418 | 713 | |
eef85c4a LP |
714 | if (*s) |
715 | return hashmap_move(*s, *other); | |
ae2a15bc LP |
716 | else |
717 | *s = TAKE_PTR(*other); | |
7c0b05e5 MS |
718 | |
719 | return 0; | |
23a177ef | 720 | } |
87f0e418 | 721 | |
7c0b05e5 | 722 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
723 | char *t; |
724 | Iterator i; | |
7c0b05e5 | 725 | int r; |
87f0e418 | 726 | |
23a177ef LP |
727 | assert(u); |
728 | assert(other); | |
729 | ||
eef85c4a | 730 | r = set_complete_move(&u->names, &other->names); |
7c0b05e5 MS |
731 | if (r < 0) |
732 | return r; | |
23a177ef | 733 | |
ac155bb8 MS |
734 | set_free_free(other->names); |
735 | other->names = NULL; | |
736 | other->id = NULL; | |
23a177ef | 737 | |
ac155bb8 MS |
738 | SET_FOREACH(t, u->names, i) |
739 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
740 | |
741 | return 0; | |
87f0e418 LP |
742 | } |
743 | ||
09a65f92 MS |
744 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
745 | unsigned n_reserve; | |
746 | ||
747 | assert(u); | |
748 | assert(other); | |
749 | assert(d < _UNIT_DEPENDENCY_MAX); | |
750 | ||
751 | /* | |
752 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 753 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
754 | * as a whole to u by complete_move(). |
755 | */ | |
756 | if (!u->dependencies[d]) | |
757 | return 0; | |
758 | ||
759 | /* merge_dependencies() will skip a u-on-u dependency */ | |
eef85c4a | 760 | n_reserve = hashmap_size(other->dependencies[d]) - !!hashmap_get(other->dependencies[d], u); |
09a65f92 | 761 | |
eef85c4a | 762 | return hashmap_reserve(u->dependencies[d], n_reserve); |
09a65f92 MS |
763 | } |
764 | ||
d1fab3fe | 765 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
766 | Iterator i; |
767 | Unit *back; | |
eef85c4a | 768 | void *v; |
87f0e418 | 769 | int r; |
23a177ef | 770 | |
eef85c4a LP |
771 | /* Merges all dependencies of type 'd' of the unit 'other' into the deps of the unit 'u' */ |
772 | ||
23a177ef LP |
773 | assert(u); |
774 | assert(other); | |
775 | assert(d < _UNIT_DEPENDENCY_MAX); | |
776 | ||
eef85c4a LP |
777 | /* Fix backwards pointers. Let's iterate through all dependendent units of the other unit. */ |
778 | HASHMAP_FOREACH_KEY(v, back, other->dependencies[d], i) { | |
23a177ef LP |
779 | UnitDependency k; |
780 | ||
eef85c4a LP |
781 | /* Let's now iterate through the dependencies of that dependencies of the other units, looking for |
782 | * pointers back, and let's fix them up, to instead point to 'u'. */ | |
783 | ||
e48614c4 | 784 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff | 785 | if (back == u) { |
eef85c4a LP |
786 | /* Do not add dependencies between u and itself. */ |
787 | if (hashmap_remove(back->dependencies[k], other)) | |
f2341e0a | 788 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff | 789 | } else { |
eef85c4a LP |
790 | UnitDependencyInfo di_u, di_other, di_merged; |
791 | ||
792 | /* Let's drop this dependency between "back" and "other", and let's create it between | |
793 | * "back" and "u" instead. Let's merge the bit masks of the dependency we are moving, | |
794 | * and any such dependency which might already exist */ | |
795 | ||
796 | di_other.data = hashmap_get(back->dependencies[k], other); | |
797 | if (!di_other.data) | |
798 | continue; /* dependency isn't set, let's try the next one */ | |
799 | ||
800 | di_u.data = hashmap_get(back->dependencies[k], u); | |
801 | ||
802 | di_merged = (UnitDependencyInfo) { | |
803 | .origin_mask = di_u.origin_mask | di_other.origin_mask, | |
804 | .destination_mask = di_u.destination_mask | di_other.destination_mask, | |
805 | }; | |
806 | ||
807 | r = hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data); | |
808 | if (r < 0) | |
809 | log_warning_errno(r, "Failed to remove/replace: back=%s other=%s u=%s: %m", back->id, other_id, u->id); | |
810 | assert(r >= 0); | |
811 | ||
812 | /* assert_se(hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data) >= 0); */ | |
e66047ff | 813 | } |
e48614c4 | 814 | } |
eef85c4a | 815 | |
23a177ef LP |
816 | } |
817 | ||
e66047ff | 818 | /* Also do not move dependencies on u to itself */ |
eef85c4a | 819 | back = hashmap_remove(other->dependencies[d], u); |
d1fab3fe | 820 | if (back) |
f2341e0a | 821 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 822 | |
7c0b05e5 | 823 | /* The move cannot fail. The caller must have performed a reservation. */ |
eef85c4a | 824 | assert_se(hashmap_complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); |
23a177ef | 825 | |
eef85c4a | 826 | other->dependencies[d] = hashmap_free(other->dependencies[d]); |
23a177ef LP |
827 | } |
828 | ||
829 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 830 | UnitDependency d; |
d1fab3fe | 831 | const char *other_id = NULL; |
09a65f92 | 832 | int r; |
87f0e418 LP |
833 | |
834 | assert(u); | |
835 | assert(other); | |
ac155bb8 MS |
836 | assert(u->manager == other->manager); |
837 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 838 | |
cc916967 LP |
839 | other = unit_follow_merge(other); |
840 | ||
23a177ef LP |
841 | if (other == u) |
842 | return 0; | |
843 | ||
ac155bb8 | 844 | if (u->type != other->type) |
9e2f7c11 LP |
845 | return -EINVAL; |
846 | ||
ac155bb8 | 847 | if (!u->instance != !other->instance) |
87f0e418 LP |
848 | return -EINVAL; |
849 | ||
8a993b61 | 850 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
851 | return -EEXIST; |
852 | ||
ec2ce0c5 | 853 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 854 | return -EEXIST; |
87f0e418 | 855 | |
ac155bb8 | 856 | if (other->job) |
819e213f LP |
857 | return -EEXIST; |
858 | ||
e0209d83 MS |
859 | if (other->nop_job) |
860 | return -EEXIST; | |
861 | ||
fdf20a31 | 862 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
863 | return -EEXIST; |
864 | ||
d1fab3fe ZJS |
865 | if (other->id) |
866 | other_id = strdupa(other->id); | |
867 | ||
09a65f92 MS |
868 | /* Make reservations to ensure merge_dependencies() won't fail */ |
869 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
870 | r = reserve_dependencies(u, other, d); | |
871 | /* | |
872 | * We don't rollback reservations if we fail. We don't have | |
873 | * a way to undo reservations. A reservation is not a leak. | |
874 | */ | |
875 | if (r < 0) | |
876 | return r; | |
877 | } | |
878 | ||
87f0e418 | 879 | /* Merge names */ |
7c0b05e5 MS |
880 | r = merge_names(u, other); |
881 | if (r < 0) | |
882 | return r; | |
87f0e418 | 883 | |
57020a3a | 884 | /* Redirect all references */ |
7f7d01ed ZJS |
885 | while (other->refs_by_target) |
886 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
57020a3a | 887 | |
87f0e418 LP |
888 | /* Merge dependencies */ |
889 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 890 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 891 | |
ac155bb8 MS |
892 | other->load_state = UNIT_MERGED; |
893 | other->merged_into = u; | |
23a177ef | 894 | |
3616a49c LP |
895 | /* If there is still some data attached to the other node, we |
896 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 897 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
898 | if (UNIT_VTABLE(other)->done) |
899 | UNIT_VTABLE(other)->done(other); | |
900 | ||
901 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
902 | unit_add_to_cleanup_queue(other); |
903 | ||
904 | return 0; | |
905 | } | |
906 | ||
907 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 908 | _cleanup_free_ char *s = NULL; |
23a177ef | 909 | Unit *other; |
9e2f7c11 | 910 | int r; |
23a177ef LP |
911 | |
912 | assert(u); | |
913 | assert(name); | |
914 | ||
7410616c | 915 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 916 | if (!u->instance) |
9e2f7c11 LP |
917 | return -EINVAL; |
918 | ||
7410616c LP |
919 | r = unit_name_replace_instance(name, u->instance, &s); |
920 | if (r < 0) | |
921 | return r; | |
9e2f7c11 LP |
922 | |
923 | name = s; | |
924 | } | |
925 | ||
c2756a68 | 926 | other = manager_get_unit(u->manager, name); |
7410616c LP |
927 | if (other) |
928 | return unit_merge(u, other); | |
23a177ef | 929 | |
7410616c | 930 | return unit_add_name(u, name); |
23a177ef LP |
931 | } |
932 | ||
933 | Unit* unit_follow_merge(Unit *u) { | |
934 | assert(u); | |
935 | ||
ac155bb8 MS |
936 | while (u->load_state == UNIT_MERGED) |
937 | assert_se(u = u->merged_into); | |
23a177ef LP |
938 | |
939 | return u; | |
940 | } | |
941 | ||
942 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
ada5e276 YW |
943 | ExecDirectoryType dt; |
944 | char **dp; | |
23a177ef LP |
945 | int r; |
946 | ||
947 | assert(u); | |
948 | assert(c); | |
949 | ||
36be24c8 | 950 | if (c->working_directory) { |
eef85c4a | 951 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
952 | if (r < 0) |
953 | return r; | |
954 | } | |
955 | ||
956 | if (c->root_directory) { | |
eef85c4a | 957 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
958 | if (r < 0) |
959 | return r; | |
960 | } | |
961 | ||
915e6d16 | 962 | if (c->root_image) { |
eef85c4a | 963 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
964 | if (r < 0) |
965 | return r; | |
966 | } | |
967 | ||
72fd1768 | 968 | for (dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
969 | if (!u->manager->prefix[dt]) |
970 | continue; | |
971 | ||
972 | STRV_FOREACH(dp, c->directories[dt].paths) { | |
973 | _cleanup_free_ char *p; | |
974 | ||
975 | p = strjoin(u->manager->prefix[dt], "/", *dp); | |
976 | if (!p) | |
977 | return -ENOMEM; | |
978 | ||
eef85c4a | 979 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
980 | if (r < 0) |
981 | return r; | |
982 | } | |
983 | } | |
984 | ||
463d0d15 | 985 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
986 | return 0; |
987 | ||
988 | if (c->private_tmp) { | |
d71f0505 LP |
989 | const char *p; |
990 | ||
991 | FOREACH_STRING(p, "/tmp", "/var/tmp") { | |
eef85c4a | 992 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
d71f0505 LP |
993 | if (r < 0) |
994 | return r; | |
995 | } | |
b46a529c | 996 | |
eef85c4a | 997 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, NULL, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
998 | if (r < 0) |
999 | return r; | |
1000 | } | |
1001 | ||
52c239d7 LB |
1002 | if (!IN_SET(c->std_output, |
1003 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1004 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1005 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE) && | |
1006 | !IN_SET(c->std_error, | |
1007 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1008 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1009 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE)) | |
23a177ef LP |
1010 | return 0; |
1011 | ||
1012 | /* If syslog or kernel logging is requested, make sure our own | |
1013 | * logging daemon is run first. */ | |
1014 | ||
eef85c4a | 1015 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1016 | if (r < 0) |
1017 | return r; | |
23a177ef | 1018 | |
87f0e418 LP |
1019 | return 0; |
1020 | } | |
1021 | ||
87f0e418 LP |
1022 | const char *unit_description(Unit *u) { |
1023 | assert(u); | |
1024 | ||
ac155bb8 MS |
1025 | if (u->description) |
1026 | return u->description; | |
87f0e418 | 1027 | |
ac155bb8 | 1028 | return strna(u->id); |
87f0e418 LP |
1029 | } |
1030 | ||
eef85c4a LP |
1031 | static void print_unit_dependency_mask(FILE *f, const char *kind, UnitDependencyMask mask, bool *space) { |
1032 | const struct { | |
1033 | UnitDependencyMask mask; | |
1034 | const char *name; | |
1035 | } table[] = { | |
1036 | { UNIT_DEPENDENCY_FILE, "file" }, | |
1037 | { UNIT_DEPENDENCY_IMPLICIT, "implicit" }, | |
1038 | { UNIT_DEPENDENCY_DEFAULT, "default" }, | |
1039 | { UNIT_DEPENDENCY_UDEV, "udev" }, | |
1040 | { UNIT_DEPENDENCY_PATH, "path" }, | |
1041 | { UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT, "mountinfo-implicit" }, | |
1042 | { UNIT_DEPENDENCY_MOUNTINFO_DEFAULT, "mountinfo-default" }, | |
1043 | { UNIT_DEPENDENCY_PROC_SWAP, "proc-swap" }, | |
1044 | }; | |
1045 | size_t i; | |
1046 | ||
1047 | assert(f); | |
1048 | assert(kind); | |
1049 | assert(space); | |
1050 | ||
1051 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
1052 | ||
1053 | if (mask == 0) | |
1054 | break; | |
1055 | ||
1056 | if ((mask & table[i].mask) == table[i].mask) { | |
1057 | if (*space) | |
1058 | fputc(' ', f); | |
1059 | else | |
1060 | *space = true; | |
1061 | ||
1062 | fputs(kind, f); | |
1063 | fputs("-", f); | |
1064 | fputs(table[i].name, f); | |
1065 | ||
1066 | mask &= ~table[i].mask; | |
1067 | } | |
1068 | } | |
1069 | ||
1070 | assert(mask == 0); | |
1071 | } | |
1072 | ||
87f0e418 | 1073 | void unit_dump(Unit *u, FILE *f, const char *prefix) { |
49dbfa7b | 1074 | char *t, **j; |
87f0e418 LP |
1075 | UnitDependency d; |
1076 | Iterator i; | |
47be870b | 1077 | const char *prefix2; |
173e3821 | 1078 | char |
a483fb59 | 1079 | timestamp0[FORMAT_TIMESTAMP_MAX], |
173e3821 LP |
1080 | timestamp1[FORMAT_TIMESTAMP_MAX], |
1081 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
1082 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
1083 | timestamp4[FORMAT_TIMESTAMP_MAX], |
1084 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 1085 | Unit *following; |
eeaedb7c | 1086 | _cleanup_set_free_ Set *following_set = NULL; |
05a98afd | 1087 | const char *n; |
02638280 LP |
1088 | CGroupMask m; |
1089 | int r; | |
87f0e418 LP |
1090 | |
1091 | assert(u); | |
ac155bb8 | 1092 | assert(u->type >= 0); |
87f0e418 | 1093 | |
4c940960 | 1094 | prefix = strempty(prefix); |
63c372cb | 1095 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
1096 | |
1097 | fprintf(f, | |
40d50879 | 1098 | "%s-> Unit %s:\n" |
87f0e418 | 1099 | "%s\tDescription: %s\n" |
9e2f7c11 | 1100 | "%s\tInstance: %s\n" |
87f0e418 | 1101 | "%s\tUnit Load State: %s\n" |
2fad8195 | 1102 | "%s\tUnit Active State: %s\n" |
b895d155 | 1103 | "%s\tState Change Timestamp: %s\n" |
173e3821 | 1104 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 1105 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 1106 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 1107 | "%s\tInactive Enter Timestamp: %s\n" |
f2f725e5 | 1108 | "%s\tMay GC: %s\n" |
9444b1f2 | 1109 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 1110 | "%s\tTransient: %s\n" |
f5869324 | 1111 | "%s\tPerpetual: %s\n" |
5afe510c | 1112 | "%s\tGarbage Collection Mode: %s\n" |
4ad49000 LP |
1113 | "%s\tSlice: %s\n" |
1114 | "%s\tCGroup: %s\n" | |
aae7e17f | 1115 | "%s\tCGroup realized: %s\n", |
ac155bb8 | 1116 | prefix, u->id, |
87f0e418 | 1117 | prefix, unit_description(u), |
ac155bb8 MS |
1118 | prefix, strna(u->instance), |
1119 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 1120 | prefix, unit_active_state_to_string(unit_active_state(u)), |
a483fb59 | 1121 | prefix, strna(format_timestamp(timestamp0, sizeof(timestamp0), u->state_change_timestamp.realtime)), |
ac155bb8 MS |
1122 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
1123 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
1124 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
1125 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
f2f725e5 | 1126 | prefix, yes_no(unit_may_gc(u)), |
9444b1f2 | 1127 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 1128 | prefix, yes_no(u->transient), |
f5869324 | 1129 | prefix, yes_no(u->perpetual), |
5afe510c | 1130 | prefix, collect_mode_to_string(u->collect_mode), |
4ad49000 LP |
1131 | prefix, strna(unit_slice_name(u)), |
1132 | prefix, strna(u->cgroup_path), | |
aae7e17f FB |
1133 | prefix, yes_no(u->cgroup_realized)); |
1134 | ||
1135 | if (u->cgroup_realized_mask != 0) { | |
1136 | _cleanup_free_ char *s = NULL; | |
1137 | (void) cg_mask_to_string(u->cgroup_realized_mask, &s); | |
02638280 LP |
1138 | fprintf(f, "%s\tCGroup realized mask: %s\n", prefix, strnull(s)); |
1139 | } | |
1140 | if (u->cgroup_enabled_mask != 0) { | |
1141 | _cleanup_free_ char *s = NULL; | |
1142 | (void) cg_mask_to_string(u->cgroup_enabled_mask, &s); | |
1143 | fprintf(f, "%s\tCGroup enabled mask: %s\n", prefix, strnull(s)); | |
1144 | } | |
1145 | m = unit_get_own_mask(u); | |
1146 | if (m != 0) { | |
1147 | _cleanup_free_ char *s = NULL; | |
1148 | (void) cg_mask_to_string(m, &s); | |
1149 | fprintf(f, "%s\tCGroup own mask: %s\n", prefix, strnull(s)); | |
aae7e17f | 1150 | } |
02638280 LP |
1151 | m = unit_get_members_mask(u); |
1152 | if (m != 0) { | |
aae7e17f | 1153 | _cleanup_free_ char *s = NULL; |
02638280 | 1154 | (void) cg_mask_to_string(m, &s); |
aae7e17f FB |
1155 | fprintf(f, "%s\tCGroup members mask: %s\n", prefix, strnull(s)); |
1156 | } | |
0301abf4 | 1157 | |
ac155bb8 | 1158 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
1159 | fprintf(f, "%s\tName: %s\n", prefix, t); |
1160 | ||
4b58153d LP |
1161 | if (!sd_id128_is_null(u->invocation_id)) |
1162 | fprintf(f, "%s\tInvocation ID: " SD_ID128_FORMAT_STR "\n", | |
1163 | prefix, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
1164 | ||
49dbfa7b LP |
1165 | STRV_FOREACH(j, u->documentation) |
1166 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
1167 | ||
eeaedb7c LP |
1168 | following = unit_following(u); |
1169 | if (following) | |
ac155bb8 | 1170 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 1171 | |
eeaedb7c LP |
1172 | r = unit_following_set(u, &following_set); |
1173 | if (r >= 0) { | |
1174 | Unit *other; | |
1175 | ||
1176 | SET_FOREACH(other, following_set, i) | |
1177 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
1178 | } | |
1179 | ||
ac155bb8 MS |
1180 | if (u->fragment_path) |
1181 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 1182 | |
1b64d026 LP |
1183 | if (u->source_path) |
1184 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
1185 | ||
ae7a7182 | 1186 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 1187 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 1188 | |
e7dfbb4e LP |
1189 | if (u->failure_action != EMERGENCY_ACTION_NONE) |
1190 | fprintf(f, "%s\tFailure Action: %s\n", prefix, emergency_action_to_string(u->failure_action)); | |
1191 | if (u->success_action != EMERGENCY_ACTION_NONE) | |
1192 | fprintf(f, "%s\tSuccess Action: %s\n", prefix, emergency_action_to_string(u->success_action)); | |
1193 | ||
36c16a7c | 1194 | if (u->job_timeout != USEC_INFINITY) |
2fa4092c | 1195 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 1196 | |
87a47f99 LN |
1197 | if (u->job_timeout_action != EMERGENCY_ACTION_NONE) |
1198 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, emergency_action_to_string(u->job_timeout_action)); | |
f189ab18 LP |
1199 | |
1200 | if (u->job_timeout_reboot_arg) | |
1201 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
1202 | ||
59fccdc5 LP |
1203 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
1204 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 1205 | |
ac155bb8 | 1206 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
1207 | fprintf(f, |
1208 | "%s\tCondition Timestamp: %s\n" | |
1209 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
1210 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
1211 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 1212 | |
59fccdc5 LP |
1213 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
1214 | fprintf(f, | |
1215 | "%s\tAssert Timestamp: %s\n" | |
1216 | "%s\tAssert Result: %s\n", | |
1217 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
1218 | prefix, yes_no(u->assert_result)); | |
1219 | ||
87f0e418 | 1220 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
eef85c4a | 1221 | UnitDependencyInfo di; |
87f0e418 LP |
1222 | Unit *other; |
1223 | ||
eef85c4a LP |
1224 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { |
1225 | bool space = false; | |
1226 | ||
1227 | fprintf(f, "%s\t%s: %s (", prefix, unit_dependency_to_string(d), other->id); | |
1228 | ||
1229 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); | |
1230 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1231 | ||
1232 | fputs(")\n", f); | |
1233 | } | |
87f0e418 LP |
1234 | } |
1235 | ||
eef85c4a LP |
1236 | if (!hashmap_isempty(u->requires_mounts_for)) { |
1237 | UnitDependencyInfo di; | |
1238 | const char *path; | |
1239 | ||
1240 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { | |
1241 | bool space = false; | |
7c8fa05c | 1242 | |
eef85c4a | 1243 | fprintf(f, "%s\tRequiresMountsFor: %s (", prefix, path); |
7c8fa05c | 1244 | |
eef85c4a LP |
1245 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); |
1246 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1247 | ||
1248 | fputs(")\n", f); | |
1249 | } | |
7c8fa05c LP |
1250 | } |
1251 | ||
ac155bb8 | 1252 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 1253 | |
b0650475 | 1254 | fprintf(f, |
a40eb732 | 1255 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
1256 | "%s\tRefuseManualStart: %s\n" |
1257 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 1258 | "%s\tDefaultDependencies: %s\n" |
d420282b | 1259 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1260 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1261 | prefix, yes_no(u->stop_when_unneeded), |
1262 | prefix, yes_no(u->refuse_manual_start), | |
1263 | prefix, yes_no(u->refuse_manual_stop), | |
1264 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1265 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1266 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 1267 | |
23a177ef LP |
1268 | if (UNIT_VTABLE(u)->dump) |
1269 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1270 | |
ac155bb8 | 1271 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1272 | fprintf(f, |
1273 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1274 | prefix, u->merged_into->id); |
1275 | else if (u->load_state == UNIT_ERROR) | |
1276 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 1277 | |
05a98afd LP |
1278 | for (n = sd_bus_track_first(u->bus_track); n; n = sd_bus_track_next(u->bus_track)) |
1279 | fprintf(f, "%s\tBus Ref: %s\n", prefix, n); | |
87f0e418 | 1280 | |
ac155bb8 MS |
1281 | if (u->job) |
1282 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1283 | |
e0209d83 MS |
1284 | if (u->nop_job) |
1285 | job_dump(u->nop_job, f, prefix2); | |
87f0e418 LP |
1286 | } |
1287 | ||
1288 | /* Common implementation for multiple backends */ | |
e537352b | 1289 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1290 | int r; |
1291 | ||
1292 | assert(u); | |
23a177ef | 1293 | |
e48614c4 | 1294 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1295 | r = unit_load_fragment(u); |
1296 | if (r < 0) | |
23a177ef LP |
1297 | return r; |
1298 | ||
ac155bb8 | 1299 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1300 | return -ENOENT; |
1301 | ||
9e4ea9cc ZJS |
1302 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1303 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1304 | * been loaded and which not, at least without doing complicated book-keeping, | |
1305 | * so let's always reread all drop-ins. */ | |
1306 | return unit_load_dropin(unit_follow_merge(u)); | |
23a177ef LP |
1307 | } |
1308 | ||
1309 | /* Common implementation for multiple backends */ | |
e537352b | 1310 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1311 | int r; |
87f0e418 LP |
1312 | |
1313 | assert(u); | |
1314 | ||
23a177ef LP |
1315 | /* Same as unit_load_fragment_and_dropin(), but whether |
1316 | * something can be loaded or not doesn't matter. */ | |
1317 | ||
e9e8cbc8 | 1318 | /* Load a .service/.socket/.slice/… file */ |
4ad49000 LP |
1319 | r = unit_load_fragment(u); |
1320 | if (r < 0) | |
87f0e418 LP |
1321 | return r; |
1322 | ||
ac155bb8 MS |
1323 | if (u->load_state == UNIT_STUB) |
1324 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1325 | |
9e4ea9cc ZJS |
1326 | /* Load drop-in directory data */ |
1327 | return unit_load_dropin(unit_follow_merge(u)); | |
87f0e418 LP |
1328 | } |
1329 | ||
19496554 MS |
1330 | void unit_add_to_target_deps_queue(Unit *u) { |
1331 | Manager *m = u->manager; | |
1332 | ||
1333 | assert(u); | |
1334 | ||
1335 | if (u->in_target_deps_queue) | |
1336 | return; | |
1337 | ||
1338 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1339 | u->in_target_deps_queue = true; | |
1340 | } | |
1341 | ||
bba34eed | 1342 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1343 | assert(u); |
1344 | assert(target); | |
1345 | ||
ac155bb8 | 1346 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1347 | return 0; |
1348 | ||
35b8ca3a | 1349 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1350 | * that loop check below is reliable */ |
ac155bb8 MS |
1351 | if (u->load_state != UNIT_LOADED || |
1352 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1353 | return 0; |
1354 | ||
21256a2b LP |
1355 | /* If either side wants no automatic dependencies, then let's |
1356 | * skip this */ | |
ac155bb8 MS |
1357 | if (!u->default_dependencies || |
1358 | !target->default_dependencies) | |
21256a2b LP |
1359 | return 0; |
1360 | ||
98bc2000 | 1361 | /* Don't create loops */ |
eef85c4a | 1362 | if (hashmap_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1363 | return 0; |
1364 | ||
eef85c4a | 1365 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1366 | } |
1367 | ||
e954c9cf | 1368 | static int unit_add_slice_dependencies(Unit *u) { |
eef85c4a | 1369 | UnitDependencyMask mask; |
e954c9cf | 1370 | assert(u); |
b81884e7 | 1371 | |
35b7ff80 | 1372 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1373 | return 0; |
1374 | ||
eef85c4a LP |
1375 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1376 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1377 | relationship). */ | |
1378 | mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; | |
1379 | ||
e954c9cf | 1380 | if (UNIT_ISSET(u->slice)) |
eef85c4a | 1381 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true, mask); |
e954c9cf | 1382 | |
8c8da0e0 | 1383 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1384 | return 0; |
1385 | ||
eef85c4a | 1386 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, NULL, true, mask); |
98bc2000 LP |
1387 | } |
1388 | ||
e954c9cf | 1389 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1390 | UnitDependencyInfo di; |
1391 | const char *path; | |
1392 | Iterator i; | |
9588bc32 LP |
1393 | int r; |
1394 | ||
1395 | assert(u); | |
1396 | ||
eef85c4a LP |
1397 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { |
1398 | char prefix[strlen(path) + 1]; | |
9588bc32 | 1399 | |
eef85c4a | 1400 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1401 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1402 | Unit *m; |
1403 | ||
c7c89abb | 1404 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1405 | if (r < 0) |
1406 | return r; | |
c7c89abb FB |
1407 | |
1408 | m = manager_get_unit(u->manager, p); | |
1409 | if (!m) { | |
1410 | /* Make sure to load the mount unit if | |
1411 | * it exists. If so the dependencies | |
1412 | * on this unit will be added later | |
1413 | * during the loading of the mount | |
1414 | * unit. */ | |
1415 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1416 | continue; |
c7c89abb | 1417 | } |
9588bc32 LP |
1418 | if (m == u) |
1419 | continue; | |
1420 | ||
1421 | if (m->load_state != UNIT_LOADED) | |
1422 | continue; | |
1423 | ||
eef85c4a | 1424 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1425 | if (r < 0) |
1426 | return r; | |
1427 | ||
1428 | if (m->fragment_path) { | |
eef85c4a | 1429 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1430 | if (r < 0) |
1431 | return r; | |
1432 | } | |
1433 | } | |
1434 | } | |
1435 | ||
1436 | return 0; | |
1437 | } | |
1438 | ||
95ae05c0 WC |
1439 | static int unit_add_startup_units(Unit *u) { |
1440 | CGroupContext *c; | |
5269eb6b | 1441 | int r; |
95ae05c0 WC |
1442 | |
1443 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1444 | if (!c) |
1445 | return 0; | |
1446 | ||
d53d9474 | 1447 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1448 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1449 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1450 | return 0; |
1451 | ||
5269eb6b LP |
1452 | r = set_ensure_allocated(&u->manager->startup_units, NULL); |
1453 | if (r < 0) | |
1454 | return r; | |
1455 | ||
756c09e6 | 1456 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1457 | } |
1458 | ||
87f0e418 LP |
1459 | int unit_load(Unit *u) { |
1460 | int r; | |
1461 | ||
1462 | assert(u); | |
1463 | ||
ac155bb8 | 1464 | if (u->in_load_queue) { |
71fda00f | 1465 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1466 | u->in_load_queue = false; |
87f0e418 LP |
1467 | } |
1468 | ||
ac155bb8 | 1469 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1470 | return -EINVAL; |
1471 | ||
ac155bb8 | 1472 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1473 | return 0; |
1474 | ||
4f4afc88 LP |
1475 | if (u->transient_file) { |
1476 | r = fflush_and_check(u->transient_file); | |
1477 | if (r < 0) | |
1478 | goto fail; | |
1479 | ||
50fb00b7 | 1480 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1481 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1482 | } |
1483 | ||
c2756a68 LP |
1484 | if (UNIT_VTABLE(u)->load) { |
1485 | r = UNIT_VTABLE(u)->load(u); | |
1486 | if (r < 0) | |
87f0e418 | 1487 | goto fail; |
c2756a68 | 1488 | } |
23a177ef | 1489 | |
ac155bb8 | 1490 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1491 | r = -ENOENT; |
1492 | goto fail; | |
1493 | } | |
1494 | ||
7c8fa05c | 1495 | if (u->load_state == UNIT_LOADED) { |
19496554 | 1496 | unit_add_to_target_deps_queue(u); |
e954c9cf LP |
1497 | |
1498 | r = unit_add_slice_dependencies(u); | |
1499 | if (r < 0) | |
1500 | goto fail; | |
c2756a68 | 1501 | |
e954c9cf | 1502 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1503 | if (r < 0) |
c2756a68 | 1504 | goto fail; |
7c8fa05c | 1505 | |
95ae05c0 WC |
1506 | r = unit_add_startup_units(u); |
1507 | if (r < 0) | |
1508 | goto fail; | |
1509 | ||
eef85c4a | 1510 | if (u->on_failure_job_mode == JOB_ISOLATE && hashmap_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1511 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
c2756a68 LP |
1512 | r = -EINVAL; |
1513 | goto fail; | |
1514 | } | |
bc432dc7 | 1515 | |
a2df3ea4 MK |
1516 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1517 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1518 | ||
bc432dc7 | 1519 | unit_update_cgroup_members_masks(u); |
f68319bb LP |
1520 | } |
1521 | ||
ac155bb8 | 1522 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1523 | |
1524 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1525 | unit_add_to_gc_queue(u); |
87f0e418 | 1526 | |
87f0e418 LP |
1527 | return 0; |
1528 | ||
1529 | fail: | |
c2756a68 | 1530 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1531 | u->load_error = r; |
c1e1601e | 1532 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1533 | unit_add_to_gc_queue(u); |
23a177ef | 1534 | |
f2341e0a | 1535 | log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
23a177ef | 1536 | |
87f0e418 LP |
1537 | return r; |
1538 | } | |
1539 | ||
49365733 LP |
1540 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1541 | Condition *c; | |
1542 | int triggered = -1; | |
1543 | ||
1544 | assert(u); | |
1545 | assert(to_string); | |
1546 | ||
1547 | /* If the condition list is empty, then it is true */ | |
1548 | if (!first) | |
1549 | return true; | |
1550 | ||
1551 | /* Otherwise, if all of the non-trigger conditions apply and | |
1552 | * if any of the trigger conditions apply (unless there are | |
1553 | * none) we return true */ | |
1554 | LIST_FOREACH(conditions, c, first) { | |
1555 | int r; | |
1556 | ||
1557 | r = condition_test(c); | |
1558 | if (r < 0) | |
f2341e0a LP |
1559 | log_unit_warning(u, |
1560 | "Couldn't determine result for %s=%s%s%s, assuming failed: %m", | |
49365733 LP |
1561 | to_string(c->type), |
1562 | c->trigger ? "|" : "", | |
1563 | c->negate ? "!" : "", | |
f2341e0a | 1564 | c->parameter); |
49365733 | 1565 | else |
f2341e0a LP |
1566 | log_unit_debug(u, |
1567 | "%s=%s%s%s %s.", | |
49365733 LP |
1568 | to_string(c->type), |
1569 | c->trigger ? "|" : "", | |
1570 | c->negate ? "!" : "", | |
1571 | c->parameter, | |
f2341e0a | 1572 | condition_result_to_string(c->result)); |
49365733 LP |
1573 | |
1574 | if (!c->trigger && r <= 0) | |
1575 | return false; | |
1576 | ||
1577 | if (c->trigger && triggered <= 0) | |
1578 | triggered = r > 0; | |
1579 | } | |
1580 | ||
1581 | return triggered != 0; | |
1582 | } | |
1583 | ||
9588bc32 | 1584 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1585 | assert(u); |
1586 | ||
ac155bb8 | 1587 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1588 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1589 | |
ac155bb8 | 1590 | return u->condition_result; |
90bbc946 LP |
1591 | } |
1592 | ||
59fccdc5 LP |
1593 | static bool unit_assert_test(Unit *u) { |
1594 | assert(u); | |
1595 | ||
1596 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1597 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1598 | |
1599 | return u->assert_result; | |
1600 | } | |
1601 | ||
df446f96 LP |
1602 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
1603 | DISABLE_WARNING_FORMAT_NONLITERAL; | |
1604 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, status, unit_status_msg_format, unit_description(u)); | |
1605 | REENABLE_WARNING; | |
1606 | } | |
1607 | ||
44a6b1b6 | 1608 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
877d54e9 | 1609 | const char *format; |
a85ca902 | 1610 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1611 | |
1612 | assert(u); | |
df446f96 | 1613 | assert(IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)); |
877d54e9 | 1614 | |
b5bf308b | 1615 | if (t != JOB_RELOAD) { |
a85ca902 MS |
1616 | format_table = &UNIT_VTABLE(u)->status_message_formats; |
1617 | if (format_table) { | |
1618 | format = format_table->starting_stopping[t == JOB_STOP]; | |
1619 | if (format) | |
1620 | return format; | |
1621 | } | |
1622 | } | |
877d54e9 LP |
1623 | |
1624 | /* Return generic strings */ | |
1625 | if (t == JOB_START) | |
1626 | return "Starting %s."; | |
1627 | else if (t == JOB_STOP) | |
1628 | return "Stopping %s."; | |
b5bf308b | 1629 | else |
877d54e9 | 1630 | return "Reloading %s."; |
877d54e9 LP |
1631 | } |
1632 | ||
1633 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1634 | const char *format; | |
1635 | ||
1636 | assert(u); | |
1637 | ||
df446f96 LP |
1638 | /* Reload status messages have traditionally not been printed to console. */ |
1639 | if (!IN_SET(t, JOB_START, JOB_STOP)) | |
1640 | return; | |
1641 | ||
877d54e9 | 1642 | format = unit_get_status_message_format(u, t); |
c6918296 | 1643 | |
bcfce235 | 1644 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1645 | unit_status_printf(u, "", format); |
bcfce235 | 1646 | REENABLE_WARNING; |
c6918296 MS |
1647 | } |
1648 | ||
877d54e9 | 1649 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
2b044526 | 1650 | const char *format, *mid; |
877d54e9 | 1651 | char buf[LINE_MAX]; |
877d54e9 LP |
1652 | |
1653 | assert(u); | |
1654 | ||
df446f96 | 1655 | if (!IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)) |
877d54e9 LP |
1656 | return; |
1657 | ||
81270860 LP |
1658 | if (log_on_console()) |
1659 | return; | |
1660 | ||
877d54e9 LP |
1661 | /* We log status messages for all units and all operations. */ |
1662 | ||
a85ca902 | 1663 | format = unit_get_status_message_format(u, t); |
877d54e9 | 1664 | |
bcfce235 | 1665 | DISABLE_WARNING_FORMAT_NONLITERAL; |
bea28c5a | 1666 | (void) snprintf(buf, sizeof buf, format, unit_description(u)); |
bcfce235 | 1667 | REENABLE_WARNING; |
877d54e9 | 1668 | |
2b044526 ZJS |
1669 | mid = t == JOB_START ? "MESSAGE_ID=" SD_MESSAGE_UNIT_STARTING_STR : |
1670 | t == JOB_STOP ? "MESSAGE_ID=" SD_MESSAGE_UNIT_STOPPING_STR : | |
1671 | "MESSAGE_ID=" SD_MESSAGE_UNIT_RELOADING_STR; | |
877d54e9 | 1672 | |
f2341e0a LP |
1673 | /* Note that we deliberately use LOG_MESSAGE() instead of |
1674 | * LOG_UNIT_MESSAGE() here, since this is supposed to mimic | |
1675 | * closely what is written to screen using the status output, | |
1676 | * which is supposed the highest level, friendliest output | |
1677 | * possible, which means we should avoid the low-level unit | |
1678 | * name. */ | |
1679 | log_struct(LOG_INFO, | |
f2341e0a | 1680 | LOG_MESSAGE("%s", buf), |
ba360bb0 | 1681 | LOG_UNIT_ID(u), |
f1c50bec | 1682 | LOG_UNIT_INVOCATION_ID(u), |
ba360bb0 | 1683 | mid, |
f2341e0a | 1684 | NULL); |
877d54e9 | 1685 | } |
877d54e9 | 1686 | |
d1a34ae9 | 1687 | void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t) { |
df446f96 LP |
1688 | assert(u); |
1689 | assert(t >= 0); | |
1690 | assert(t < _JOB_TYPE_MAX); | |
d1a34ae9 MS |
1691 | |
1692 | unit_status_log_starting_stopping_reloading(u, t); | |
df446f96 | 1693 | unit_status_print_starting_stopping(u, t); |
d1a34ae9 MS |
1694 | } |
1695 | ||
07299350 | 1696 | int unit_start_limit_test(Unit *u) { |
6bf0f408 LP |
1697 | assert(u); |
1698 | ||
7994ac1d | 1699 | if (ratelimit_below(&u->start_limit)) { |
6bf0f408 LP |
1700 | u->start_limit_hit = false; |
1701 | return 0; | |
1702 | } | |
1703 | ||
1704 | log_unit_warning(u, "Start request repeated too quickly."); | |
1705 | u->start_limit_hit = true; | |
1706 | ||
87a47f99 | 1707 | return emergency_action(u->manager, u->start_limit_action, u->reboot_arg, "unit failed"); |
6bf0f408 LP |
1708 | } |
1709 | ||
c891efaf | 1710 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1711 | assert(u); |
c891efaf FB |
1712 | |
1713 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1714 | return false; | |
1715 | ||
1716 | /* For some reasons units remaining in the same process group | |
1717 | * as PID 1 fail to acquire the console even if it's not used | |
1718 | * by any process. So skip the confirmation question for them. */ | |
1719 | return !unit_get_exec_context(u)->same_pgrp; | |
1720 | } | |
1721 | ||
631b676b LP |
1722 | static bool unit_verify_deps(Unit *u) { |
1723 | Unit *other; | |
1724 | Iterator j; | |
eef85c4a | 1725 | void *v; |
631b676b LP |
1726 | |
1727 | assert(u); | |
1728 | ||
1729 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with | |
1730 | * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job | |
1731 | * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in | |
1732 | * conjunction with After= as for them any such check would make things entirely racy. */ | |
1733 | ||
eef85c4a | 1734 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], j) { |
631b676b | 1735 | |
eef85c4a | 1736 | if (!hashmap_contains(u->dependencies[UNIT_AFTER], other)) |
631b676b LP |
1737 | continue; |
1738 | ||
1739 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1740 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1741 | return false; | |
1742 | } | |
1743 | } | |
1744 | ||
1745 | return true; | |
1746 | } | |
1747 | ||
87f0e418 | 1748 | /* Errors: |
6bf0f408 LP |
1749 | * -EBADR: This unit type does not support starting. |
1750 | * -EALREADY: Unit is already started. | |
1751 | * -EAGAIN: An operation is already in progress. Retry later. | |
1752 | * -ECANCELED: Too many requests for now. | |
1753 | * -EPROTO: Assert failed | |
1754 | * -EINVAL: Unit not loaded | |
1755 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1756 | * -ENOLINK: The necessary dependencies are not fulfilled. |
d4fd1cf2 | 1757 | * -ESTALE: This unit has been started before and can't be started a second time |
87f0e418 LP |
1758 | */ |
1759 | int unit_start(Unit *u) { | |
1760 | UnitActiveState state; | |
92ab323c | 1761 | Unit *following; |
87f0e418 LP |
1762 | |
1763 | assert(u); | |
1764 | ||
a82e5507 LP |
1765 | /* If this is already started, then this will succeed. Note |
1766 | * that this will even succeed if this unit is not startable | |
1767 | * by the user. This is relied on to detect when we need to | |
1768 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1769 | state = unit_active_state(u); |
1770 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1771 | return -EALREADY; | |
1772 | ||
6bf0f408 LP |
1773 | /* Units that aren't loaded cannot be started */ |
1774 | if (u->load_state != UNIT_LOADED) | |
1775 | return -EINVAL; | |
1776 | ||
d4fd1cf2 LP |
1777 | /* Refuse starting scope units more than once */ |
1778 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1779 | return -ESTALE; | |
1780 | ||
a82e5507 LP |
1781 | /* If the conditions failed, don't do anything at all. If we |
1782 | * already are activating this call might still be useful to | |
1783 | * speed up activation in case there is some hold-off time, | |
1784 | * but we don't want to recheck the condition in that case. */ | |
1785 | if (state != UNIT_ACTIVATING && | |
1786 | !unit_condition_test(u)) { | |
f2341e0a | 1787 | log_unit_debug(u, "Starting requested but condition failed. Not starting unit."); |
52661efd LP |
1788 | return -EALREADY; |
1789 | } | |
1790 | ||
59fccdc5 LP |
1791 | /* If the asserts failed, fail the entire job */ |
1792 | if (state != UNIT_ACTIVATING && | |
1793 | !unit_assert_test(u)) { | |
f2341e0a | 1794 | log_unit_notice(u, "Starting requested but asserts failed."); |
59fccdc5 LP |
1795 | return -EPROTO; |
1796 | } | |
1797 | ||
d11a7645 LP |
1798 | /* Units of types that aren't supported cannot be |
1799 | * started. Note that we do this test only after the condition | |
1800 | * checks, so that we rather return condition check errors | |
1801 | * (which are usually not considered a true failure) than "not | |
1802 | * supported" errors (which are considered a failure). | |
1803 | */ | |
1804 | if (!unit_supported(u)) | |
1805 | return -EOPNOTSUPP; | |
1806 | ||
631b676b LP |
1807 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine should have |
1808 | * taken care of this already, but let's check this here again. After all, our dependencies might not be in | |
1809 | * effect anymore, due to a reload or due to a failed condition. */ | |
1810 | if (!unit_verify_deps(u)) | |
1811 | return -ENOLINK; | |
1812 | ||
92ab323c | 1813 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1814 | following = unit_following(u); |
1815 | if (following) { | |
f2341e0a | 1816 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1817 | return unit_start(following); |
1818 | } | |
1819 | ||
1820 | /* If it is stopped, but we cannot start it, then fail */ | |
1821 | if (!UNIT_VTABLE(u)->start) | |
1822 | return -EBADR; | |
1823 | ||
87f0e418 LP |
1824 | /* We don't suppress calls to ->start() here when we are |
1825 | * already starting, to allow this request to be used as a | |
1826 | * "hurry up" call, for example when the unit is in some "auto | |
1827 | * restart" state where it waits for a holdoff timer to elapse | |
1828 | * before it will start again. */ | |
1829 | ||
c1e1601e | 1830 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1831 | |
d1a34ae9 | 1832 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1833 | } |
1834 | ||
1835 | bool unit_can_start(Unit *u) { | |
1836 | assert(u); | |
1837 | ||
8ff4d2ab LP |
1838 | if (u->load_state != UNIT_LOADED) |
1839 | return false; | |
1840 | ||
1841 | if (!unit_supported(u)) | |
1842 | return false; | |
1843 | ||
d4fd1cf2 LP |
1844 | /* Scope units may be started only once */ |
1845 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
1846 | return false; | |
1847 | ||
87f0e418 LP |
1848 | return !!UNIT_VTABLE(u)->start; |
1849 | } | |
1850 | ||
2528a7a6 LP |
1851 | bool unit_can_isolate(Unit *u) { |
1852 | assert(u); | |
1853 | ||
1854 | return unit_can_start(u) && | |
ac155bb8 | 1855 | u->allow_isolate; |
2528a7a6 LP |
1856 | } |
1857 | ||
87f0e418 LP |
1858 | /* Errors: |
1859 | * -EBADR: This unit type does not support stopping. | |
1860 | * -EALREADY: Unit is already stopped. | |
1861 | * -EAGAIN: An operation is already in progress. Retry later. | |
1862 | */ | |
1863 | int unit_stop(Unit *u) { | |
1864 | UnitActiveState state; | |
92ab323c | 1865 | Unit *following; |
87f0e418 LP |
1866 | |
1867 | assert(u); | |
1868 | ||
87f0e418 | 1869 | state = unit_active_state(u); |
fdf20a31 | 1870 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1871 | return -EALREADY; |
1872 | ||
0faacd47 LP |
1873 | following = unit_following(u); |
1874 | if (following) { | |
f2341e0a | 1875 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1876 | return unit_stop(following); |
1877 | } | |
1878 | ||
7898b0cf LP |
1879 | if (!UNIT_VTABLE(u)->stop) |
1880 | return -EBADR; | |
1881 | ||
c1e1601e | 1882 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1883 | |
d1a34ae9 | 1884 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1885 | } |
1886 | ||
f5869324 LP |
1887 | bool unit_can_stop(Unit *u) { |
1888 | assert(u); | |
1889 | ||
1890 | if (!unit_supported(u)) | |
1891 | return false; | |
1892 | ||
1893 | if (u->perpetual) | |
1894 | return false; | |
1895 | ||
1896 | return !!UNIT_VTABLE(u)->stop; | |
1897 | } | |
1898 | ||
87f0e418 LP |
1899 | /* Errors: |
1900 | * -EBADR: This unit type does not support reloading. | |
1901 | * -ENOEXEC: Unit is not started. | |
1902 | * -EAGAIN: An operation is already in progress. Retry later. | |
1903 | */ | |
1904 | int unit_reload(Unit *u) { | |
1905 | UnitActiveState state; | |
92ab323c | 1906 | Unit *following; |
87f0e418 LP |
1907 | |
1908 | assert(u); | |
1909 | ||
ac155bb8 | 1910 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1911 | return -EINVAL; |
1912 | ||
87f0e418 LP |
1913 | if (!unit_can_reload(u)) |
1914 | return -EBADR; | |
1915 | ||
1916 | state = unit_active_state(u); | |
e364ad06 | 1917 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1918 | return -EALREADY; |
1919 | ||
6a371e23 | 1920 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1921 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1922 | return -ENOEXEC; |
6a371e23 | 1923 | } |
87f0e418 | 1924 | |
e48614c4 ZJS |
1925 | following = unit_following(u); |
1926 | if (following) { | |
f2341e0a | 1927 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1928 | return unit_reload(following); |
1929 | } | |
1930 | ||
c1e1601e | 1931 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1932 | |
f54bcca5 JR |
1933 | if (!UNIT_VTABLE(u)->reload) { |
1934 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
1935 | unit_notify(u, unit_active_state(u), unit_active_state(u), true); | |
1936 | return 0; | |
1937 | } | |
1938 | ||
d1a34ae9 | 1939 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1940 | } |
1941 | ||
1942 | bool unit_can_reload(Unit *u) { | |
1943 | assert(u); | |
1944 | ||
f54bcca5 JR |
1945 | if (UNIT_VTABLE(u)->can_reload) |
1946 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 1947 | |
eef85c4a | 1948 | if (!hashmap_isempty(u->dependencies[UNIT_PROPAGATES_RELOAD_TO])) |
87f0e418 LP |
1949 | return true; |
1950 | ||
f54bcca5 | 1951 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
1952 | } |
1953 | ||
b4a16b7b | 1954 | static void unit_check_unneeded(Unit *u) { |
be7d9ff7 | 1955 | |
4afd3348 | 1956 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
4bd29fe5 | 1957 | |
be7d9ff7 LP |
1958 | static const UnitDependency needed_dependencies[] = { |
1959 | UNIT_REQUIRED_BY, | |
084918ba | 1960 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1961 | UNIT_WANTED_BY, |
1962 | UNIT_BOUND_BY, | |
1963 | }; | |
1964 | ||
be7d9ff7 LP |
1965 | unsigned j; |
1966 | int r; | |
f3bff0eb LP |
1967 | |
1968 | assert(u); | |
1969 | ||
1970 | /* If this service shall be shut down when unneeded then do | |
1971 | * so. */ | |
1972 | ||
ac155bb8 | 1973 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1974 | return; |
1975 | ||
1976 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1977 | return; | |
1978 | ||
eef85c4a LP |
1979 | for (j = 0; j < ELEMENTSOF(needed_dependencies); j++) { |
1980 | Unit *other; | |
1981 | Iterator i; | |
1982 | void *v; | |
1983 | ||
1984 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[needed_dependencies[j]], i) | |
deb4e708 | 1985 | if (unit_active_or_pending(other) || unit_will_restart(other)) |
be7d9ff7 | 1986 | return; |
eef85c4a | 1987 | } |
b81884e7 | 1988 | |
595bfe7d | 1989 | /* If stopping a unit fails continuously we might enter a stop |
bea355da LP |
1990 | * loop here, hence stop acting on the service being |
1991 | * unnecessary after a while. */ | |
7994ac1d | 1992 | if (!ratelimit_below(&u->auto_stop_ratelimit)) { |
bea355da LP |
1993 | log_unit_warning(u, "Unit not needed anymore, but not stopping since we tried this too often recently."); |
1994 | return; | |
1995 | } | |
1996 | ||
f2341e0a | 1997 | log_unit_info(u, "Unit not needed anymore. Stopping."); |
f3bff0eb LP |
1998 | |
1999 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
4bd29fe5 | 2000 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
be7d9ff7 | 2001 | if (r < 0) |
4bd29fe5 | 2002 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
f3bff0eb LP |
2003 | } |
2004 | ||
ff502445 | 2005 | static void unit_check_binds_to(Unit *u) { |
4afd3348 | 2006 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
ff502445 LP |
2007 | bool stop = false; |
2008 | Unit *other; | |
2009 | Iterator i; | |
eef85c4a | 2010 | void *v; |
67bfdc97 | 2011 | int r; |
ff502445 LP |
2012 | |
2013 | assert(u); | |
2014 | ||
2015 | if (u->job) | |
2016 | return; | |
2017 | ||
2018 | if (unit_active_state(u) != UNIT_ACTIVE) | |
2019 | return; | |
2020 | ||
eef85c4a | 2021 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) { |
ff502445 LP |
2022 | if (other->job) |
2023 | continue; | |
13ddc3fc ZJS |
2024 | |
2025 | if (!other->coldplugged) | |
2026 | /* We might yet create a job for the other unit… */ | |
2027 | continue; | |
ff502445 LP |
2028 | |
2029 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
2030 | continue; | |
2031 | ||
2032 | stop = true; | |
98f738b6 | 2033 | break; |
ff502445 LP |
2034 | } |
2035 | ||
2036 | if (!stop) | |
2037 | return; | |
2038 | ||
595bfe7d | 2039 | /* If stopping a unit fails continuously we might enter a stop |
67bfdc97 LP |
2040 | * loop here, hence stop acting on the service being |
2041 | * unnecessary after a while. */ | |
7994ac1d | 2042 | if (!ratelimit_below(&u->auto_stop_ratelimit)) { |
67bfdc97 LP |
2043 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); |
2044 | return; | |
2045 | } | |
2046 | ||
98f738b6 | 2047 | assert(other); |
f2341e0a | 2048 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
2049 | |
2050 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
4bd29fe5 | 2051 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
67bfdc97 | 2052 | if (r < 0) |
4bd29fe5 | 2053 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
ff502445 LP |
2054 | } |
2055 | ||
87f0e418 LP |
2056 | static void retroactively_start_dependencies(Unit *u) { |
2057 | Iterator i; | |
2058 | Unit *other; | |
eef85c4a | 2059 | void *v; |
87f0e418 LP |
2060 | |
2061 | assert(u); | |
2062 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2063 | ||
eef85c4a LP |
2064 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUIRES], i) |
2065 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2066 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2067 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
b81884e7 | 2068 | |
eef85c4a LP |
2069 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) |
2070 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2071 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2072 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
87f0e418 | 2073 | |
eef85c4a LP |
2074 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_WANTS], i) |
2075 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2076 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2077 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL); |
87f0e418 | 2078 | |
eef85c4a | 2079 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 2080 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2081 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
69dd2852 | 2082 | |
eef85c4a | 2083 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 2084 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2085 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
87f0e418 LP |
2086 | } |
2087 | ||
2088 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 | 2089 | Unit *other; |
eef85c4a LP |
2090 | Iterator i; |
2091 | void *v; | |
87f0e418 LP |
2092 | |
2093 | assert(u); | |
2094 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2095 | ||
b81884e7 | 2096 | /* Pull down units which are bound to us recursively if enabled */ |
eef85c4a | 2097 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 2098 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2099 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
cd0504d0 MS |
2100 | } |
2101 | ||
2102 | static void check_unneeded_dependencies(Unit *u) { | |
cd0504d0 | 2103 | Unit *other; |
eef85c4a LP |
2104 | Iterator i; |
2105 | void *v; | |
cd0504d0 MS |
2106 | |
2107 | assert(u); | |
2108 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
2109 | |
2110 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
eef85c4a | 2111 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 2112 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 2113 | unit_check_unneeded(other); |
eef85c4a | 2114 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 2115 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 2116 | unit_check_unneeded(other); |
eef85c4a | 2117 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 2118 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 2119 | unit_check_unneeded(other); |
eef85c4a | 2120 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
2121 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
2122 | unit_check_unneeded(other); | |
87f0e418 LP |
2123 | } |
2124 | ||
3ecaa09b | 2125 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
2126 | Unit *other; |
2127 | Iterator i; | |
eef85c4a | 2128 | void *v; |
7f66b026 | 2129 | int r; |
c0daa706 LP |
2130 | |
2131 | assert(u); | |
2132 | ||
eef85c4a | 2133 | if (hashmap_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
2134 | return; |
2135 | ||
f2341e0a | 2136 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 2137 | |
eef85c4a | 2138 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_ON_FAILURE], i) { |
7f66b026 | 2139 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
222ae6a8 | 2140 | |
7f66b026 | 2141 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, &error, NULL); |
c1b6628d | 2142 | if (r < 0) |
7f66b026 | 2143 | log_unit_warning_errno(u, r, "Failed to enqueue OnFailure= job, ignoring: %s", bus_error_message(&error, r)); |
222ae6a8 | 2144 | } |
c0daa706 LP |
2145 | } |
2146 | ||
3ecaa09b LP |
2147 | void unit_trigger_notify(Unit *u) { |
2148 | Unit *other; | |
2149 | Iterator i; | |
eef85c4a | 2150 | void *v; |
3ecaa09b LP |
2151 | |
2152 | assert(u); | |
2153 | ||
eef85c4a | 2154 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_TRIGGERED_BY], i) |
3ecaa09b LP |
2155 | if (UNIT_VTABLE(other)->trigger_notify) |
2156 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2157 | } | |
2158 | ||
915b1d01 LP |
2159 | static int unit_log_resources(Unit *u) { |
2160 | ||
2161 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + 4]; | |
2162 | size_t n_message_parts = 0, n_iovec = 0; | |
2163 | char* message_parts[3 + 1], *t; | |
2164 | nsec_t nsec = NSEC_INFINITY; | |
2165 | CGroupIPAccountingMetric m; | |
2166 | size_t i; | |
2167 | int r; | |
2168 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2169 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2170 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2171 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2172 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2173 | }; | |
2174 | ||
2175 | assert(u); | |
2176 | ||
2177 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2178 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2179 | * information and the complete data in structured fields. */ | |
2180 | ||
2181 | (void) unit_get_cpu_usage(u, &nsec); | |
2182 | if (nsec != NSEC_INFINITY) { | |
2183 | char buf[FORMAT_TIMESPAN_MAX] = ""; | |
2184 | ||
2185 | /* Format the CPU time for inclusion in the structured log message */ | |
2186 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2187 | r = log_oom(); | |
2188 | goto finish; | |
2189 | } | |
2190 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2191 | ||
2192 | /* Format the CPU time for inclusion in the human language message string */ | |
2193 | format_timespan(buf, sizeof(buf), nsec / NSEC_PER_USEC, USEC_PER_MSEC); | |
2194 | t = strjoin(n_message_parts > 0 ? "consumed " : "Consumed ", buf, " CPU time"); | |
2195 | if (!t) { | |
2196 | r = log_oom(); | |
2197 | goto finish; | |
2198 | } | |
2199 | ||
2200 | message_parts[n_message_parts++] = t; | |
2201 | } | |
2202 | ||
2203 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { | |
2204 | char buf[FORMAT_BYTES_MAX] = ""; | |
2205 | uint64_t value = UINT64_MAX; | |
2206 | ||
2207 | assert(ip_fields[m]); | |
2208 | ||
2209 | (void) unit_get_ip_accounting(u, m, &value); | |
2210 | if (value == UINT64_MAX) | |
2211 | continue; | |
2212 | ||
2213 | /* Format IP accounting data for inclusion in the structured log message */ | |
2214 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2215 | r = log_oom(); | |
2216 | goto finish; | |
2217 | } | |
2218 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2219 | ||
2220 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2221 | * bytes counters (and not for the packets counters) */ | |
2222 | if (m == CGROUP_IP_INGRESS_BYTES) | |
2223 | t = strjoin(n_message_parts > 0 ? "received " : "Received ", | |
2224 | format_bytes(buf, sizeof(buf), value), | |
2225 | " IP traffic"); | |
2226 | else if (m == CGROUP_IP_EGRESS_BYTES) | |
2227 | t = strjoin(n_message_parts > 0 ? "sent " : "Sent ", | |
2228 | format_bytes(buf, sizeof(buf), value), | |
2229 | " IP traffic"); | |
2230 | else | |
2231 | continue; | |
2232 | if (!t) { | |
2233 | r = log_oom(); | |
2234 | goto finish; | |
2235 | } | |
2236 | ||
2237 | message_parts[n_message_parts++] = t; | |
2238 | } | |
2239 | ||
2240 | /* Is there any accounting data available at all? */ | |
2241 | if (n_iovec == 0) { | |
2242 | r = 0; | |
2243 | goto finish; | |
2244 | } | |
2245 | ||
2246 | if (n_message_parts == 0) | |
2247 | t = strjoina("MESSAGE=", u->id, ": Completed"); | |
2248 | else { | |
2249 | _cleanup_free_ char *joined; | |
2250 | ||
2251 | message_parts[n_message_parts] = NULL; | |
2252 | ||
2253 | joined = strv_join(message_parts, ", "); | |
2254 | if (!joined) { | |
2255 | r = log_oom(); | |
2256 | goto finish; | |
2257 | } | |
2258 | ||
2259 | t = strjoina("MESSAGE=", u->id, ": ", joined); | |
2260 | } | |
2261 | ||
2262 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2263 | * and hence don't increase n_iovec for them */ | |
2264 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2265 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2266 | ||
2267 | t = strjoina(u->manager->unit_log_field, u->id); | |
2268 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2269 | ||
2270 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2271 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2272 | ||
2273 | log_struct_iovec(LOG_INFO, iovec, n_iovec + 4); | |
2274 | r = 0; | |
2275 | ||
2276 | finish: | |
2277 | for (i = 0; i < n_message_parts; i++) | |
2278 | free(message_parts[i]); | |
2279 | ||
2280 | for (i = 0; i < n_iovec; i++) | |
2281 | free(iovec[i].iov_base); | |
2282 | ||
2283 | return r; | |
2284 | ||
2285 | } | |
2286 | ||
adefcf28 LP |
2287 | static void unit_update_on_console(Unit *u) { |
2288 | bool b; | |
2289 | ||
2290 | assert(u); | |
2291 | ||
2292 | b = unit_needs_console(u); | |
2293 | if (u->on_console == b) | |
2294 | return; | |
2295 | ||
2296 | u->on_console = b; | |
2297 | if (b) | |
2298 | manager_ref_console(u->manager); | |
2299 | else | |
2300 | manager_unref_console(u->manager); | |
2301 | ||
2302 | } | |
2303 | ||
e2f3b44c | 2304 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
7e6e7b06 | 2305 | bool unexpected; |
8559b3b7 | 2306 | Manager *m; |
a096ed36 | 2307 | |
87f0e418 LP |
2308 | assert(u); |
2309 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2310 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2311 | |
8559b3b7 LP |
2312 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2313 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2314 | * remounted this function will be called too! */ | |
87f0e418 | 2315 | |
546ac4f0 MS |
2316 | m = u->manager; |
2317 | ||
f755e3b7 | 2318 | /* Update timestamps for state changes */ |
2c289ea8 | 2319 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2320 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2321 | |
bdbf9951 | 2322 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2323 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2324 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2325 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2326 | |
2327 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2328 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2329 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2330 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2331 | } |
87f0e418 | 2332 | |
865cc19a | 2333 | /* Keep track of failed units */ |
5269eb6b | 2334 | (void) manager_update_failed_units(u->manager, u, ns == UNIT_FAILED); |
f755e3b7 | 2335 | |
d3070fbd LP |
2336 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2337 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
efdb0237 | 2338 | unit_prune_cgroup(u); |
d3070fbd LP |
2339 | unit_unlink_state_files(u); |
2340 | } | |
fb385181 | 2341 | |
adefcf28 | 2342 | unit_update_on_console(u); |
7ed9f6cd | 2343 | |
ac155bb8 | 2344 | if (u->job) { |
7e6e7b06 | 2345 | unexpected = false; |
87f0e418 | 2346 | |
ac155bb8 | 2347 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
2348 | |
2349 | /* So we reached a different state for this | |
2350 | * job. Let's see if we can run it now if it | |
2351 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 2352 | job_add_to_run_queue(u->job); |
87f0e418 | 2353 | |
b410e6b9 | 2354 | /* Let's check whether this state change constitutes a |
35b8ca3a | 2355 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 2356 | * hence needs to invalidate jobs. */ |
87f0e418 | 2357 | |
ac155bb8 | 2358 | switch (u->job->type) { |
87f0e418 | 2359 | |
b410e6b9 LP |
2360 | case JOB_START: |
2361 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 2362 | |
b410e6b9 | 2363 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
833f92ad | 2364 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 2365 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 2366 | unexpected = true; |
41b02ec7 | 2367 | |
fdf20a31 | 2368 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2369 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
b410e6b9 | 2370 | } |
87f0e418 | 2371 | |
b410e6b9 | 2372 | break; |
87f0e418 | 2373 | |
b410e6b9 LP |
2374 | case JOB_RELOAD: |
2375 | case JOB_RELOAD_OR_START: | |
3282591d | 2376 | case JOB_TRY_RELOAD: |
87f0e418 | 2377 | |
ac155bb8 | 2378 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 2379 | if (ns == UNIT_ACTIVE) |
833f92ad | 2380 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true, false); |
ec2ce0c5 | 2381 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { |
a096ed36 | 2382 | unexpected = true; |
41b02ec7 | 2383 | |
fdf20a31 | 2384 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2385 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
a096ed36 | 2386 | } |
b410e6b9 | 2387 | } |
87f0e418 | 2388 | |
b410e6b9 | 2389 | break; |
87f0e418 | 2390 | |
b410e6b9 LP |
2391 | case JOB_STOP: |
2392 | case JOB_RESTART: | |
2393 | case JOB_TRY_RESTART: | |
87f0e418 | 2394 | |
fdf20a31 | 2395 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2396 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 2397 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 2398 | unexpected = true; |
833f92ad | 2399 | job_finish_and_invalidate(u->job, JOB_FAILED, true, false); |
b410e6b9 | 2400 | } |
87f0e418 | 2401 | |
b410e6b9 | 2402 | break; |
87f0e418 | 2403 | |
b410e6b9 LP |
2404 | default: |
2405 | assert_not_reached("Job type unknown"); | |
87f0e418 | 2406 | } |
87f0e418 | 2407 | |
7e6e7b06 LP |
2408 | } else |
2409 | unexpected = true; | |
2410 | ||
2c289ea8 | 2411 | if (!MANAGER_IS_RELOADING(m)) { |
f3bff0eb | 2412 | |
bdbf9951 LP |
2413 | /* If this state change happened without being |
2414 | * requested by a job, then let's retroactively start | |
2415 | * or stop dependencies. We skip that step when | |
2416 | * deserializing, since we don't want to create any | |
2417 | * additional jobs just because something is already | |
2418 | * activated. */ | |
2419 | ||
2420 | if (unexpected) { | |
2421 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2422 | retroactively_start_dependencies(u); | |
2423 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2424 | retroactively_stop_dependencies(u); | |
2425 | } | |
5de9682c | 2426 | |
cd0504d0 | 2427 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 2428 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
2429 | check_unneeded_dependencies(u); |
2430 | ||
bdbf9951 | 2431 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2432 | log_unit_debug(u, "Unit entered failed state."); |
3ecaa09b | 2433 | unit_start_on_failure(u); |
cd6d0a45 | 2434 | } |
3b2775c5 | 2435 | } |
e537352b | 2436 | |
3b2775c5 LP |
2437 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { |
2438 | ||
ac155bb8 | 2439 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 2440 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
2c289ea8 | 2441 | !MANAGER_IS_RELOADING(m)) { |
3b2775c5 | 2442 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 2443 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 2444 | u->in_audit = true; |
3b2775c5 | 2445 | } |
e983b760 | 2446 | |
3b2775c5 | 2447 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 2448 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 2449 | |
3b2775c5 | 2450 | } else { |
bdbf9951 | 2451 | |
915b1d01 LP |
2452 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && |
2453 | !UNIT_IS_INACTIVE_OR_FAILED(os) | |
2454 | && !MANAGER_IS_RELOADING(m)) { | |
cd6d0a45 | 2455 | |
915b1d01 LP |
2456 | /* This unit just stopped/failed. */ |
2457 | if (u->type == UNIT_SERVICE) { | |
4927fcae | 2458 | |
915b1d01 LP |
2459 | /* Hmm, if there was no start record written |
2460 | * write it now, so that we always have a nice | |
2461 | * pair */ | |
2462 | if (!u->in_audit) { | |
2463 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); | |
cd6d0a45 | 2464 | |
915b1d01 LP |
2465 | if (ns == UNIT_INACTIVE) |
2466 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); | |
2467 | } else | |
2468 | /* Write audit record if we have just finished shutting down */ | |
2469 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); | |
2470 | ||
2471 | u->in_audit = false; | |
2472 | } | |
bdbf9951 | 2473 | |
915b1d01 LP |
2474 | /* Write a log message about consumed resources */ |
2475 | unit_log_resources(u); | |
cd6d0a45 | 2476 | } |
f278026d LP |
2477 | } |
2478 | ||
31dc1ca3 LP |
2479 | manager_recheck_journal(m); |
2480 | manager_recheck_dbus(m); | |
e63ebf71 | 2481 | |
3ecaa09b | 2482 | unit_trigger_notify(u); |
3b2775c5 | 2483 | |
2c289ea8 | 2484 | if (!MANAGER_IS_RELOADING(u->manager)) { |
8559b3b7 | 2485 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ |
bf6dcfa6 | 2486 | unit_check_unneeded(u); |
c1e1601e | 2487 | |
8559b3b7 LP |
2488 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens when |
2489 | * something BindsTo= to a Type=oneshot unit, as these units go directly from starting to inactive, | |
ff502445 LP |
2490 | * without ever entering started.) */ |
2491 | unit_check_binds_to(u); | |
53c35a76 LP |
2492 | |
2493 | if (os != UNIT_FAILED && ns == UNIT_FAILED) | |
2494 | (void) emergency_action(u->manager, u->failure_action, u->reboot_arg, "unit failed"); | |
e7dfbb4e LP |
2495 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) |
2496 | (void) emergency_action(u->manager, u->success_action, u->reboot_arg, "unit succeeded"); | |
ff502445 LP |
2497 | } |
2498 | ||
c1e1601e | 2499 | unit_add_to_dbus_queue(u); |
701cc384 | 2500 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2501 | } |
2502 | ||
87f0e418 | 2503 | int unit_watch_pid(Unit *u, pid_t pid) { |
62a76913 | 2504 | int r; |
a911bb9a | 2505 | |
87f0e418 | 2506 | assert(u); |
62a76913 | 2507 | assert(pid_is_valid(pid)); |
87f0e418 | 2508 | |
62a76913 | 2509 | /* Watch a specific PID */ |
5ba6985b | 2510 | |
d5099efc | 2511 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2512 | if (r < 0) |
2513 | return r; | |
2514 | ||
62a76913 | 2515 | r = hashmap_ensure_allocated(&u->manager->watch_pids, NULL); |
a911bb9a LP |
2516 | if (r < 0) |
2517 | return r; | |
2518 | ||
62a76913 LP |
2519 | /* First try, let's add the unit keyed by "pid". */ |
2520 | r = hashmap_put(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2521 | if (r == -EEXIST) { | |
2522 | Unit **array; | |
2523 | bool found = false; | |
2524 | size_t n = 0; | |
05e343b7 | 2525 | |
62a76913 LP |
2526 | /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points |
2527 | * to an array of Units rather than just a Unit), lists us already. */ | |
a911bb9a | 2528 | |
62a76913 LP |
2529 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); |
2530 | if (array) | |
2531 | for (; array[n]; n++) | |
2532 | if (array[n] == u) | |
2533 | found = true; | |
a911bb9a | 2534 | |
62a76913 LP |
2535 | if (found) /* Found it already? if so, do nothing */ |
2536 | r = 0; | |
2537 | else { | |
2538 | Unit **new_array; | |
2539 | ||
2540 | /* Allocate a new array */ | |
2541 | new_array = new(Unit*, n + 2); | |
2542 | if (!new_array) | |
2543 | return -ENOMEM; | |
2544 | ||
2545 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2546 | new_array[n] = u; | |
2547 | new_array[n+1] = NULL; | |
2548 | ||
2549 | /* Add or replace the old array */ | |
2550 | r = hashmap_replace(u->manager->watch_pids, PID_TO_PTR(-pid), new_array); | |
2551 | if (r < 0) { | |
2552 | free(new_array); | |
2553 | return r; | |
2554 | } | |
2555 | ||
2556 | free(array); | |
2557 | } | |
2558 | } else if (r < 0) | |
2559 | return r; | |
2560 | ||
2561 | r = set_put(u->pids, PID_TO_PTR(pid)); | |
2562 | if (r < 0) | |
2563 | return r; | |
2564 | ||
2565 | return 0; | |
87f0e418 LP |
2566 | } |
2567 | ||
2568 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
62a76913 LP |
2569 | Unit **array; |
2570 | ||
87f0e418 | 2571 | assert(u); |
62a76913 LP |
2572 | assert(pid_is_valid(pid)); |
2573 | ||
2574 | /* First let's drop the unit in case it's keyed as "pid". */ | |
2575 | (void) hashmap_remove_value(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2576 | ||
2577 | /* Then, let's also drop the unit, in case it's in the array keyed by -pid */ | |
2578 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); | |
2579 | if (array) { | |
2580 | size_t n, m = 0; | |
2581 | ||
2582 | /* Let's iterate through the array, dropping our own entry */ | |
2583 | for (n = 0; array[n]; n++) | |
2584 | if (array[n] != u) | |
2585 | array[m++] = array[n]; | |
2586 | array[m] = NULL; | |
2587 | ||
2588 | if (m == 0) { | |
2589 | /* The array is now empty, remove the entire entry */ | |
2590 | assert(hashmap_remove(u->manager->watch_pids, PID_TO_PTR(-pid)) == array); | |
2591 | free(array); | |
2592 | } | |
2593 | } | |
87f0e418 | 2594 | |
fea72cc0 | 2595 | (void) set_remove(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2596 | } |
2597 | ||
bd44e61b LP |
2598 | void unit_unwatch_all_pids(Unit *u) { |
2599 | assert(u); | |
2600 | ||
2601 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2602 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2603 | |
efdb0237 | 2604 | u->pids = set_free(u->pids); |
a911bb9a LP |
2605 | } |
2606 | ||
2607 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2608 | Iterator i; | |
2609 | void *e; | |
2610 | ||
2611 | assert(u); | |
2612 | ||
2613 | /* Cleans dead PIDs from our list */ | |
2614 | ||
2615 | SET_FOREACH(e, u->pids, i) { | |
fea72cc0 | 2616 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2617 | |
2618 | if (pid == except1 || pid == except2) | |
2619 | continue; | |
2620 | ||
9f5650ae | 2621 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2622 | unit_unwatch_pid(u, pid); |
a911bb9a | 2623 | } |
87f0e418 LP |
2624 | } |
2625 | ||
87f0e418 LP |
2626 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2627 | assert(u); | |
2628 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2629 | ||
2630 | switch (j) { | |
2631 | ||
2632 | case JOB_VERIFY_ACTIVE: | |
2633 | case JOB_START: | |
e0209d83 | 2634 | case JOB_NOP: |
f5869324 LP |
2635 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
2636 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueing | |
2637 | * jobs for it. */ | |
87f0e418 LP |
2638 | return true; |
2639 | ||
f5869324 LP |
2640 | case JOB_STOP: |
2641 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
2642 | * external events), hence it makes no sense to permit enqueing such a request either. */ | |
2643 | return !u->perpetual; | |
2644 | ||
87f0e418 LP |
2645 | case JOB_RESTART: |
2646 | case JOB_TRY_RESTART: | |
f5869324 | 2647 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
2648 | |
2649 | case JOB_RELOAD: | |
3282591d | 2650 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2651 | return unit_can_reload(u); |
2652 | ||
2653 | case JOB_RELOAD_OR_START: | |
2654 | return unit_can_reload(u) && unit_can_start(u); | |
2655 | ||
2656 | default: | |
2657 | assert_not_reached("Invalid job type"); | |
2658 | } | |
2659 | } | |
2660 | ||
f2341e0a LP |
2661 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2662 | assert(u); | |
d1fab3fe | 2663 | |
f2341e0a LP |
2664 | /* Only warn about some unit types */ |
2665 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2666 | return; | |
3f3cc397 | 2667 | |
f2341e0a LP |
2668 | if (streq_ptr(u->id, other)) |
2669 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2670 | else | |
2671 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2672 | } |
2673 | ||
eef85c4a LP |
2674 | static int unit_add_dependency_hashmap( |
2675 | Hashmap **h, | |
2676 | Unit *other, | |
2677 | UnitDependencyMask origin_mask, | |
2678 | UnitDependencyMask destination_mask) { | |
2679 | ||
2680 | UnitDependencyInfo info; | |
2681 | int r; | |
2682 | ||
2683 | assert(h); | |
2684 | assert(other); | |
2685 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2686 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2687 | assert(origin_mask > 0 || destination_mask > 0); | |
2688 | ||
2689 | r = hashmap_ensure_allocated(h, NULL); | |
2690 | if (r < 0) | |
2691 | return r; | |
2692 | ||
2693 | assert_cc(sizeof(void*) == sizeof(info)); | |
2694 | ||
2695 | info.data = hashmap_get(*h, other); | |
2696 | if (info.data) { | |
2697 | /* Entry already exists. Add in our mask. */ | |
2698 | ||
2699 | if ((info.origin_mask & origin_mask) == info.origin_mask && | |
2700 | (info.destination_mask & destination_mask) == info.destination_mask) | |
2701 | return 0; /* NOP */ | |
2702 | ||
2703 | info.origin_mask |= origin_mask; | |
2704 | info.destination_mask |= destination_mask; | |
2705 | ||
2706 | r = hashmap_update(*h, other, info.data); | |
2707 | } else { | |
2708 | info = (UnitDependencyInfo) { | |
2709 | .origin_mask = origin_mask, | |
2710 | .destination_mask = destination_mask, | |
2711 | }; | |
2712 | ||
2713 | r = hashmap_put(*h, other, info.data); | |
2714 | } | |
2715 | if (r < 0) | |
2716 | return r; | |
2717 | ||
2718 | return 1; | |
2719 | } | |
2720 | ||
2721 | int unit_add_dependency( | |
2722 | Unit *u, | |
2723 | UnitDependency d, | |
2724 | Unit *other, | |
2725 | bool add_reference, | |
2726 | UnitDependencyMask mask) { | |
87f0e418 LP |
2727 | |
2728 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2729 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 2730 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 2731 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 2732 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2733 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 2734 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 2735 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 2736 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 2737 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2738 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2739 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2740 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2741 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2742 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2743 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2744 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2745 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2746 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2747 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2748 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2749 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2750 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2751 | }; |
eef85c4a LP |
2752 | Unit *original_u = u, *original_other = other; |
2753 | int r; | |
87f0e418 LP |
2754 | |
2755 | assert(u); | |
2756 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2757 | assert(other); |
2758 | ||
9f151f29 LP |
2759 | u = unit_follow_merge(u); |
2760 | other = unit_follow_merge(other); | |
2761 | ||
87f0e418 LP |
2762 | /* We won't allow dependencies on ourselves. We will not |
2763 | * consider them an error however. */ | |
d1fab3fe | 2764 | if (u == other) { |
eef85c4a | 2765 | maybe_warn_about_dependency(original_u, original_other->id, d); |
87f0e418 | 2766 | return 0; |
d1fab3fe | 2767 | } |
87f0e418 | 2768 | |
eef85c4a LP |
2769 | if ((d == UNIT_BEFORE && other->type == UNIT_DEVICE) || |
2770 | (d == UNIT_AFTER && u->type == UNIT_DEVICE)) { | |
dd5e7000 ZJS |
2771 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
2772 | return 0; | |
2773 | } | |
2774 | ||
eef85c4a | 2775 | r = unit_add_dependency_hashmap(u->dependencies + d, other, mask, 0); |
613b411c | 2776 | if (r < 0) |
87f0e418 LP |
2777 | return r; |
2778 | ||
eef85c4a LP |
2779 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2780 | r = unit_add_dependency_hashmap(other->dependencies + inverse_table[d], u, 0, mask); | |
613b411c LP |
2781 | if (r < 0) |
2782 | return r; | |
2783 | } | |
2784 | ||
2785 | if (add_reference) { | |
eef85c4a | 2786 | r = unit_add_dependency_hashmap(u->dependencies + UNIT_REFERENCES, other, mask, 0); |
613b411c | 2787 | if (r < 0) |
5de9682c LP |
2788 | return r; |
2789 | ||
eef85c4a | 2790 | r = unit_add_dependency_hashmap(other->dependencies + UNIT_REFERENCED_BY, u, 0, mask); |
613b411c | 2791 | if (r < 0) |
701cc384 | 2792 | return r; |
613b411c | 2793 | } |
87f0e418 | 2794 | |
c1e1601e | 2795 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
2796 | return 0; |
2797 | } | |
0301abf4 | 2798 | |
eef85c4a | 2799 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
2c966c03 LP |
2800 | int r; |
2801 | ||
2802 | assert(u); | |
2803 | ||
eef85c4a | 2804 | r = unit_add_dependency(u, d, other, add_reference, mask); |
3f3cc397 | 2805 | if (r < 0) |
2c966c03 LP |
2806 | return r; |
2807 | ||
eef85c4a | 2808 | return unit_add_dependency(u, e, other, add_reference, mask); |
2c966c03 LP |
2809 | } |
2810 | ||
7410616c LP |
2811 | static int resolve_template(Unit *u, const char *name, const char*path, char **buf, const char **ret) { |
2812 | int r; | |
9e2f7c11 LP |
2813 | |
2814 | assert(u); | |
2815 | assert(name || path); | |
7410616c LP |
2816 | assert(buf); |
2817 | assert(ret); | |
9e2f7c11 LP |
2818 | |
2819 | if (!name) | |
2b6bf07d | 2820 | name = basename(path); |
9e2f7c11 | 2821 | |
7410616c LP |
2822 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2823 | *buf = NULL; | |
2824 | *ret = name; | |
2825 | return 0; | |
9e2f7c11 LP |
2826 | } |
2827 | ||
ac155bb8 | 2828 | if (u->instance) |
7410616c | 2829 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 2830 | else { |
ae018d9b | 2831 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2832 | |
7410616c LP |
2833 | r = unit_name_to_prefix(u->id, &i); |
2834 | if (r < 0) | |
2835 | return r; | |
9e2f7c11 | 2836 | |
7410616c | 2837 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 2838 | } |
7410616c LP |
2839 | if (r < 0) |
2840 | return r; | |
9e2f7c11 | 2841 | |
7410616c LP |
2842 | *ret = *buf; |
2843 | return 0; | |
9e2f7c11 LP |
2844 | } |
2845 | ||
eef85c4a | 2846 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference, UnitDependencyMask mask) { |
7410616c | 2847 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
2848 | Unit *other; |
2849 | int r; | |
2850 | ||
9e2f7c11 LP |
2851 | assert(u); |
2852 | assert(name || path); | |
09b6b09f | 2853 | |
7410616c LP |
2854 | r = resolve_template(u, name, path, &buf, &name); |
2855 | if (r < 0) | |
2856 | return r; | |
09b6b09f | 2857 | |
8afbb8e1 LP |
2858 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2859 | if (r < 0) | |
2860 | return r; | |
9e2f7c11 | 2861 | |
eef85c4a | 2862 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
2863 | } |
2864 | ||
eef85c4a | 2865 | 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 | 2866 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2867 | Unit *other; |
2868 | int r; | |
2c966c03 LP |
2869 | |
2870 | assert(u); | |
2871 | assert(name || path); | |
2872 | ||
7410616c LP |
2873 | r = resolve_template(u, name, path, &buf, &name); |
2874 | if (r < 0) | |
2875 | return r; | |
2c966c03 | 2876 | |
3f3cc397 LP |
2877 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2878 | if (r < 0) | |
68eda4bd | 2879 | return r; |
2c966c03 | 2880 | |
eef85c4a | 2881 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
2882 | } |
2883 | ||
0301abf4 | 2884 | int set_unit_path(const char *p) { |
0301abf4 | 2885 | /* This is mostly for debug purposes */ |
cbe46ead | 2886 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 2887 | return -errno; |
0301abf4 LP |
2888 | |
2889 | return 0; | |
2890 | } | |
88066b3a | 2891 | |
ea430986 | 2892 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2893 | assert(u); |
2894 | ||
ac155bb8 | 2895 | if (!u->id) |
04ade7d2 LP |
2896 | return NULL; |
2897 | ||
48899192 | 2898 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2899 | } |
2900 | ||
4b58153d LP |
2901 | char *unit_dbus_path_invocation_id(Unit *u) { |
2902 | assert(u); | |
2903 | ||
2904 | if (sd_id128_is_null(u->invocation_id)) | |
2905 | return NULL; | |
2906 | ||
2907 | return unit_dbus_path_from_name(u->invocation_id_string); | |
2908 | } | |
2909 | ||
d79200e2 LP |
2910 | int unit_set_slice(Unit *u, Unit *slice) { |
2911 | assert(u); | |
2912 | assert(slice); | |
2913 | ||
2914 | /* Sets the unit slice if it has not been set before. Is extra | |
2915 | * careful, to only allow this for units that actually have a | |
2916 | * cgroup context. Also, we don't allow to set this for slices | |
2917 | * (since the parent slice is derived from the name). Make | |
2918 | * sure the unit we set is actually a slice. */ | |
2919 | ||
2920 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
2921 | return -EOPNOTSUPP; | |
2922 | ||
2923 | if (u->type == UNIT_SLICE) | |
2924 | return -EINVAL; | |
2925 | ||
102ef982 LP |
2926 | if (unit_active_state(u) != UNIT_INACTIVE) |
2927 | return -EBUSY; | |
2928 | ||
d79200e2 LP |
2929 | if (slice->type != UNIT_SLICE) |
2930 | return -EINVAL; | |
2931 | ||
efdb0237 LP |
2932 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
2933 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
2934 | return -EPERM; | |
2935 | ||
d79200e2 LP |
2936 | if (UNIT_DEREF(u->slice) == slice) |
2937 | return 0; | |
2938 | ||
99e66921 TH |
2939 | /* Disallow slice changes if @u is already bound to cgroups */ |
2940 | if (UNIT_ISSET(u->slice) && u->cgroup_realized) | |
d79200e2 LP |
2941 | return -EBUSY; |
2942 | ||
7f7d01ed | 2943 | unit_ref_set(&u->slice, u, slice); |
d79200e2 LP |
2944 | return 1; |
2945 | } | |
2946 | ||
2947 | int unit_set_default_slice(Unit *u) { | |
a8833944 LP |
2948 | _cleanup_free_ char *b = NULL; |
2949 | const char *slice_name; | |
a016b922 LP |
2950 | Unit *slice; |
2951 | int r; | |
2952 | ||
2953 | assert(u); | |
2954 | ||
9444b1f2 | 2955 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2956 | return 0; |
2957 | ||
a8833944 LP |
2958 | if (u->instance) { |
2959 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2960 | |
a8833944 LP |
2961 | /* Implicitly place all instantiated units in their |
2962 | * own per-template slice */ | |
2963 | ||
7410616c LP |
2964 | r = unit_name_to_prefix(u->id, &prefix); |
2965 | if (r < 0) | |
2966 | return r; | |
a8833944 LP |
2967 | |
2968 | /* The prefix is already escaped, but it might include | |
2969 | * "-" which has a special meaning for slice units, | |
2970 | * hence escape it here extra. */ | |
7410616c | 2971 | escaped = unit_name_escape(prefix); |
a8833944 LP |
2972 | if (!escaped) |
2973 | return -ENOMEM; | |
2974 | ||
463d0d15 | 2975 | if (MANAGER_IS_SYSTEM(u->manager)) |
605405c6 | 2976 | b = strjoin("system-", escaped, ".slice"); |
a8833944 LP |
2977 | else |
2978 | b = strappend(escaped, ".slice"); | |
2979 | if (!b) | |
2980 | return -ENOMEM; | |
2981 | ||
2982 | slice_name = b; | |
2983 | } else | |
2984 | slice_name = | |
463d0d15 | 2985 | MANAGER_IS_SYSTEM(u->manager) && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
2986 | ? SPECIAL_SYSTEM_SLICE |
2987 | : SPECIAL_ROOT_SLICE; | |
2988 | ||
2989 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2990 | if (r < 0) |
2991 | return r; | |
2992 | ||
d79200e2 | 2993 | return unit_set_slice(u, slice); |
a016b922 LP |
2994 | } |
2995 | ||
9444b1f2 LP |
2996 | const char *unit_slice_name(Unit *u) { |
2997 | assert(u); | |
2998 | ||
2999 | if (!UNIT_ISSET(u->slice)) | |
3000 | return NULL; | |
3001 | ||
3002 | return UNIT_DEREF(u->slice)->id; | |
3003 | } | |
3004 | ||
f6ff8c29 | 3005 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 3006 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
3007 | int r; |
3008 | ||
3009 | assert(u); | |
3010 | assert(type); | |
3011 | assert(_found); | |
3012 | ||
7410616c LP |
3013 | r = unit_name_change_suffix(u->id, type, &t); |
3014 | if (r < 0) | |
3015 | return r; | |
3016 | if (unit_has_name(u, t)) | |
3017 | return -EINVAL; | |
f6ff8c29 | 3018 | |
ac155bb8 | 3019 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3020 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3021 | return r; |
3022 | } | |
3023 | ||
bbc29086 DM |
3024 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
3025 | const char *name, *old_owner, *new_owner; | |
3026 | Unit *u = userdata; | |
3027 | int r; | |
3028 | ||
3029 | assert(message); | |
3030 | assert(u); | |
3031 | ||
3032 | r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner); | |
3033 | if (r < 0) { | |
3034 | bus_log_parse_error(r); | |
3035 | return 0; | |
3036 | } | |
3037 | ||
a8ea93a5 LP |
3038 | old_owner = empty_to_null(old_owner); |
3039 | new_owner = empty_to_null(new_owner); | |
b0076268 | 3040 | |
bbc29086 DM |
3041 | if (UNIT_VTABLE(u)->bus_name_owner_change) |
3042 | UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); | |
3043 | ||
3044 | return 0; | |
3045 | } | |
3046 | ||
9806e87d LP |
3047 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3048 | const char *match; | |
bbc29086 | 3049 | |
9806e87d LP |
3050 | assert(u); |
3051 | assert(bus); | |
3052 | assert(name); | |
bbc29086 DM |
3053 | |
3054 | if (u->match_bus_slot) | |
3055 | return -EBUSY; | |
3056 | ||
9806e87d | 3057 | match = strjoina("type='signal'," |
81d62103 ZJS |
3058 | "sender='org.freedesktop.DBus'," |
3059 | "path='/org/freedesktop/DBus'," | |
3060 | "interface='org.freedesktop.DBus'," | |
3061 | "member='NameOwnerChanged'," | |
3062 | "arg0='", name, "'"); | |
bbc29086 | 3063 | |
75152a4d | 3064 | return sd_bus_add_match_async(bus, &u->match_bus_slot, match, signal_name_owner_changed, NULL, u); |
bbc29086 DM |
3065 | } |
3066 | ||
05e343b7 | 3067 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3068 | int r; |
3069 | ||
05e343b7 LP |
3070 | assert(u); |
3071 | assert(name); | |
3072 | ||
3073 | /* Watch a specific name on the bus. We only support one unit | |
3074 | * watching each name for now. */ | |
3075 | ||
bbc29086 DM |
3076 | if (u->manager->api_bus) { |
3077 | /* If the bus is already available, install the match directly. | |
3078 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3079 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3080 | if (r < 0) |
8ea823b6 | 3081 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3082 | } |
3083 | ||
3084 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3085 | if (r < 0) { | |
3086 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3087 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); | |
3088 | } | |
3089 | ||
3090 | return 0; | |
05e343b7 LP |
3091 | } |
3092 | ||
3093 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3094 | assert(u); | |
3095 | assert(name); | |
3096 | ||
8367fea5 | 3097 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3098 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
05e343b7 LP |
3099 | } |
3100 | ||
a16e1123 LP |
3101 | bool unit_can_serialize(Unit *u) { |
3102 | assert(u); | |
3103 | ||
3104 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
3105 | } | |
3106 | ||
8b108bd0 FB |
3107 | static int unit_serialize_cgroup_mask(FILE *f, const char *key, CGroupMask mask) { |
3108 | _cleanup_free_ char *s = NULL; | |
3109 | int r = 0; | |
3110 | ||
3111 | assert(f); | |
3112 | assert(key); | |
3113 | ||
3114 | if (mask != 0) { | |
3115 | r = cg_mask_to_string(mask, &s); | |
3116 | if (r >= 0) { | |
3117 | fputs(key, f); | |
3118 | fputc('=', f); | |
3119 | fputs(s, f); | |
3120 | fputc('\n', f); | |
3121 | } | |
3122 | } | |
3123 | return r; | |
3124 | } | |
3125 | ||
6b659ed8 LP |
3126 | static const char *ip_accounting_metric_field[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { |
3127 | [CGROUP_IP_INGRESS_BYTES] = "ip-accounting-ingress-bytes", | |
3128 | [CGROUP_IP_INGRESS_PACKETS] = "ip-accounting-ingress-packets", | |
3129 | [CGROUP_IP_EGRESS_BYTES] = "ip-accounting-egress-bytes", | |
3130 | [CGROUP_IP_EGRESS_PACKETS] = "ip-accounting-egress-packets", | |
3131 | }; | |
3132 | ||
6b78f9b4 | 3133 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
6b659ed8 | 3134 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3135 | int r; |
3136 | ||
3137 | assert(u); | |
3138 | assert(f); | |
3139 | assert(fds); | |
3140 | ||
9bdb98c5 | 3141 | if (unit_can_serialize(u)) { |
9bdb98c5 | 3142 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
3143 | if (r < 0) |
3144 | return r; | |
e0209d83 MS |
3145 | } |
3146 | ||
a483fb59 LP |
3147 | dual_timestamp_serialize(f, "state-change-timestamp", &u->state_change_timestamp); |
3148 | ||
ac155bb8 MS |
3149 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
3150 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
3151 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
3152 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
a483fb59 | 3153 | |
ac155bb8 | 3154 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); |
59fccdc5 | 3155 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 3156 | |
ac155bb8 MS |
3157 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
3158 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 3159 | |
59fccdc5 LP |
3160 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
3161 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
3162 | ||
c2756a68 | 3163 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
fe700f46 | 3164 | |
d3070fbd LP |
3165 | unit_serialize_item(u, f, "exported-invocation-id", yes_no(u->exported_invocation_id)); |
3166 | unit_serialize_item(u, f, "exported-log-level-max", yes_no(u->exported_log_level_max)); | |
3167 | unit_serialize_item(u, f, "exported-log-extra-fields", yes_no(u->exported_log_extra_fields)); | |
3168 | ||
66ebf6c0 | 3169 | unit_serialize_item_format(u, f, "cpu-usage-base", "%" PRIu64, u->cpu_usage_base); |
fe700f46 LP |
3170 | if (u->cpu_usage_last != NSEC_INFINITY) |
3171 | unit_serialize_item_format(u, f, "cpu-usage-last", "%" PRIu64, u->cpu_usage_last); | |
c2756a68 LP |
3172 | |
3173 | if (u->cgroup_path) | |
3174 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
de1d4f9b | 3175 | unit_serialize_item(u, f, "cgroup-realized", yes_no(u->cgroup_realized)); |
8b108bd0 FB |
3176 | (void) unit_serialize_cgroup_mask(f, "cgroup-realized-mask", u->cgroup_realized_mask); |
3177 | (void) unit_serialize_cgroup_mask(f, "cgroup-enabled-mask", u->cgroup_enabled_mask); | |
906c06f6 | 3178 | unit_serialize_item_format(u, f, "cgroup-bpf-realized", "%i", u->cgroup_bpf_state); |
c2756a68 | 3179 | |
00d9ef85 LP |
3180 | if (uid_is_valid(u->ref_uid)) |
3181 | unit_serialize_item_format(u, f, "ref-uid", UID_FMT, u->ref_uid); | |
3182 | if (gid_is_valid(u->ref_gid)) | |
3183 | unit_serialize_item_format(u, f, "ref-gid", GID_FMT, u->ref_gid); | |
3184 | ||
4b58153d LP |
3185 | if (!sd_id128_is_null(u->invocation_id)) |
3186 | unit_serialize_item_format(u, f, "invocation-id", SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
3187 | ||
05a98afd LP |
3188 | bus_track_serialize(u->bus_track, f, "ref"); |
3189 | ||
6b659ed8 LP |
3190 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
3191 | uint64_t v; | |
3192 | ||
3193 | r = unit_get_ip_accounting(u, m, &v); | |
3194 | if (r >= 0) | |
3195 | unit_serialize_item_format(u, f, ip_accounting_metric_field[m], "%" PRIu64, v); | |
3196 | } | |
3197 | ||
613b411c LP |
3198 | if (serialize_jobs) { |
3199 | if (u->job) { | |
3200 | fprintf(f, "job\n"); | |
05a98afd | 3201 | job_serialize(u->job, f); |
613b411c LP |
3202 | } |
3203 | ||
3204 | if (u->nop_job) { | |
3205 | fprintf(f, "job\n"); | |
05a98afd | 3206 | job_serialize(u->nop_job, f); |
613b411c LP |
3207 | } |
3208 | } | |
3209 | ||
a16e1123 LP |
3210 | /* End marker */ |
3211 | fputc('\n', f); | |
3212 | return 0; | |
3213 | } | |
3214 | ||
a34ceba6 LP |
3215 | int unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { |
3216 | assert(u); | |
3217 | assert(f); | |
3218 | assert(key); | |
3219 | ||
3220 | if (!value) | |
3221 | return 0; | |
3222 | ||
3223 | fputs(key, f); | |
3224 | fputc('=', f); | |
3225 | fputs(value, f); | |
3226 | fputc('\n', f); | |
3227 | ||
3228 | return 1; | |
3229 | } | |
3230 | ||
3231 | int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *value) { | |
3232 | _cleanup_free_ char *c = NULL; | |
3233 | ||
3234 | assert(u); | |
3235 | assert(f); | |
3236 | assert(key); | |
3237 | ||
3238 | if (!value) | |
3239 | return 0; | |
3240 | ||
3241 | c = cescape(value); | |
3242 | if (!c) | |
3243 | return -ENOMEM; | |
3244 | ||
3245 | fputs(key, f); | |
3246 | fputc('=', f); | |
3247 | fputs(c, f); | |
3248 | fputc('\n', f); | |
3249 | ||
3250 | return 1; | |
3251 | } | |
3252 | ||
3253 | int unit_serialize_item_fd(Unit *u, FILE *f, FDSet *fds, const char *key, int fd) { | |
3254 | int copy; | |
3255 | ||
3256 | assert(u); | |
3257 | assert(f); | |
3258 | assert(key); | |
3259 | ||
3260 | if (fd < 0) | |
3261 | return 0; | |
3262 | ||
3263 | copy = fdset_put_dup(fds, fd); | |
3264 | if (copy < 0) | |
3265 | return copy; | |
3266 | ||
3267 | fprintf(f, "%s=%i\n", key, copy); | |
3268 | return 1; | |
3269 | } | |
3270 | ||
a16e1123 LP |
3271 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { |
3272 | va_list ap; | |
3273 | ||
3274 | assert(u); | |
3275 | assert(f); | |
3276 | assert(key); | |
3277 | assert(format); | |
3278 | ||
3279 | fputs(key, f); | |
3280 | fputc('=', f); | |
3281 | ||
3282 | va_start(ap, format); | |
3283 | vfprintf(f, format, ap); | |
3284 | va_end(ap); | |
3285 | ||
3286 | fputc('\n', f); | |
3287 | } | |
3288 | ||
a16e1123 LP |
3289 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
3290 | int r; | |
3291 | ||
3292 | assert(u); | |
3293 | assert(f); | |
3294 | assert(fds); | |
3295 | ||
a16e1123 | 3296 | for (;;) { |
20c03b7b | 3297 | char line[LINE_MAX], *l, *v; |
6b659ed8 | 3298 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3299 | size_t k; |
3300 | ||
3301 | if (!fgets(line, sizeof(line), f)) { | |
3302 | if (feof(f)) | |
3303 | return 0; | |
3304 | return -errno; | |
3305 | } | |
3306 | ||
10f8e83c | 3307 | char_array_0(line); |
a16e1123 LP |
3308 | l = strstrip(line); |
3309 | ||
3310 | /* End marker */ | |
e911de99 | 3311 | if (isempty(l)) |
a483fb59 | 3312 | break; |
a16e1123 LP |
3313 | |
3314 | k = strcspn(l, "="); | |
3315 | ||
3316 | if (l[k] == '=') { | |
3317 | l[k] = 0; | |
3318 | v = l+k+1; | |
3319 | } else | |
3320 | v = l+k; | |
3321 | ||
cca098b0 | 3322 | if (streq(l, "job")) { |
39a18c60 MS |
3323 | if (v[0] == '\0') { |
3324 | /* new-style serialized job */ | |
9c3349e2 LP |
3325 | Job *j; |
3326 | ||
3327 | j = job_new_raw(u); | |
39a18c60 | 3328 | if (!j) |
e911de99 | 3329 | return log_oom(); |
39a18c60 | 3330 | |
05a98afd | 3331 | r = job_deserialize(j, f); |
39a18c60 MS |
3332 | if (r < 0) { |
3333 | job_free(j); | |
3334 | return r; | |
3335 | } | |
cca098b0 | 3336 | |
39a18c60 MS |
3337 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
3338 | if (r < 0) { | |
3339 | job_free(j); | |
3340 | return r; | |
3341 | } | |
e0209d83 MS |
3342 | |
3343 | r = job_install_deserialized(j); | |
3344 | if (r < 0) { | |
3345 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
3346 | job_free(j); | |
3347 | return r; | |
3348 | } | |
ed10fa8c LP |
3349 | } else /* legacy for pre-44 */ |
3350 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); | |
cca098b0 | 3351 | continue; |
a483fb59 LP |
3352 | } else if (streq(l, "state-change-timestamp")) { |
3353 | dual_timestamp_deserialize(v, &u->state_change_timestamp); | |
3354 | continue; | |
8aaf019b | 3355 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 3356 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
3357 | continue; |
3358 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 3359 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
3360 | continue; |
3361 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 3362 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
3363 | continue; |
3364 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 3365 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 3366 | continue; |
2791a8f8 | 3367 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 3368 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 3369 | continue; |
59fccdc5 LP |
3370 | } else if (streq(l, "assert-timestamp")) { |
3371 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
3372 | continue; | |
2791a8f8 | 3373 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 3374 | |
e911de99 LP |
3375 | r = parse_boolean(v); |
3376 | if (r < 0) | |
f2341e0a | 3377 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 3378 | else |
e911de99 | 3379 | u->condition_result = r; |
efbac6d2 LP |
3380 | |
3381 | continue; | |
c2756a68 | 3382 | |
59fccdc5 | 3383 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 3384 | |
e911de99 LP |
3385 | r = parse_boolean(v); |
3386 | if (r < 0) | |
f2341e0a | 3387 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 3388 | else |
e911de99 | 3389 | u->assert_result = r; |
59fccdc5 LP |
3390 | |
3391 | continue; | |
3392 | ||
c2756a68 | 3393 | } else if (streq(l, "transient")) { |
c2756a68 | 3394 | |
e911de99 LP |
3395 | r = parse_boolean(v); |
3396 | if (r < 0) | |
f2341e0a | 3397 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 3398 | else |
e911de99 | 3399 | u->transient = r; |
c2756a68 LP |
3400 | |
3401 | continue; | |
e911de99 | 3402 | |
d3070fbd LP |
3403 | } else if (streq(l, "exported-invocation-id")) { |
3404 | ||
3405 | r = parse_boolean(v); | |
3406 | if (r < 0) | |
3407 | log_unit_debug(u, "Failed to parse exported invocation ID bool %s, ignoring.", v); | |
3408 | else | |
3409 | u->exported_invocation_id = r; | |
3410 | ||
3411 | continue; | |
3412 | ||
3413 | } else if (streq(l, "exported-log-level-max")) { | |
3414 | ||
3415 | r = parse_boolean(v); | |
3416 | if (r < 0) | |
3417 | log_unit_debug(u, "Failed to parse exported log level max bool %s, ignoring.", v); | |
3418 | else | |
3419 | u->exported_log_level_max = r; | |
3420 | ||
3421 | continue; | |
3422 | ||
3423 | } else if (streq(l, "exported-log-extra-fields")) { | |
3424 | ||
3425 | r = parse_boolean(v); | |
3426 | if (r < 0) | |
3427 | log_unit_debug(u, "Failed to parse exported log extra fields bool %s, ignoring.", v); | |
3428 | else | |
3429 | u->exported_log_extra_fields = r; | |
3430 | ||
3431 | continue; | |
3432 | ||
fe700f46 | 3433 | } else if (STR_IN_SET(l, "cpu-usage-base", "cpuacct-usage-base")) { |
5ad096b3 | 3434 | |
66ebf6c0 | 3435 | r = safe_atou64(v, &u->cpu_usage_base); |
5ad096b3 | 3436 | if (r < 0) |
fe700f46 LP |
3437 | log_unit_debug(u, "Failed to parse CPU usage base %s, ignoring.", v); |
3438 | ||
3439 | continue; | |
3440 | ||
3441 | } else if (streq(l, "cpu-usage-last")) { | |
3442 | ||
3443 | r = safe_atou64(v, &u->cpu_usage_last); | |
3444 | if (r < 0) | |
3445 | log_unit_debug(u, "Failed to read CPU usage last %s, ignoring.", v); | |
5ad096b3 | 3446 | |
0f908397 | 3447 | continue; |
4e595329 | 3448 | |
e911de99 | 3449 | } else if (streq(l, "cgroup")) { |
72673e86 | 3450 | |
e911de99 LP |
3451 | r = unit_set_cgroup_path(u, v); |
3452 | if (r < 0) | |
f2341e0a | 3453 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 3454 | |
efdb0237 LP |
3455 | (void) unit_watch_cgroup(u); |
3456 | ||
de1d4f9b WF |
3457 | continue; |
3458 | } else if (streq(l, "cgroup-realized")) { | |
3459 | int b; | |
3460 | ||
3461 | b = parse_boolean(v); | |
3462 | if (b < 0) | |
3463 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
3464 | else | |
3465 | u->cgroup_realized = b; | |
3466 | ||
c2756a68 | 3467 | continue; |
00d9ef85 | 3468 | |
8b108bd0 FB |
3469 | } else if (streq(l, "cgroup-realized-mask")) { |
3470 | ||
3471 | r = cg_mask_from_string(v, &u->cgroup_realized_mask); | |
3472 | if (r < 0) | |
3473 | log_unit_debug(u, "Failed to parse cgroup-realized-mask %s, ignoring.", v); | |
3474 | continue; | |
3475 | ||
3476 | } else if (streq(l, "cgroup-enabled-mask")) { | |
3477 | ||
3478 | r = cg_mask_from_string(v, &u->cgroup_enabled_mask); | |
3479 | if (r < 0) | |
3480 | log_unit_debug(u, "Failed to parse cgroup-enabled-mask %s, ignoring.", v); | |
3481 | continue; | |
3482 | ||
906c06f6 DM |
3483 | } else if (streq(l, "cgroup-bpf-realized")) { |
3484 | int i; | |
3485 | ||
3486 | r = safe_atoi(v, &i); | |
3487 | if (r < 0) | |
3488 | log_unit_debug(u, "Failed to parse cgroup BPF state %s, ignoring.", v); | |
3489 | else | |
3490 | u->cgroup_bpf_state = | |
3491 | i < 0 ? UNIT_CGROUP_BPF_INVALIDATED : | |
3492 | i > 0 ? UNIT_CGROUP_BPF_ON : | |
3493 | UNIT_CGROUP_BPF_OFF; | |
3494 | ||
3495 | continue; | |
3496 | ||
00d9ef85 LP |
3497 | } else if (streq(l, "ref-uid")) { |
3498 | uid_t uid; | |
3499 | ||
3500 | r = parse_uid(v, &uid); | |
3501 | if (r < 0) | |
3502 | log_unit_debug(u, "Failed to parse referenced UID %s, ignoring.", v); | |
3503 | else | |
3504 | unit_ref_uid_gid(u, uid, GID_INVALID); | |
3505 | ||
3506 | continue; | |
3507 | ||
3508 | } else if (streq(l, "ref-gid")) { | |
3509 | gid_t gid; | |
3510 | ||
3511 | r = parse_gid(v, &gid); | |
3512 | if (r < 0) | |
3513 | log_unit_debug(u, "Failed to parse referenced GID %s, ignoring.", v); | |
3514 | else | |
3515 | unit_ref_uid_gid(u, UID_INVALID, gid); | |
3516 | ||
05a98afd LP |
3517 | } else if (streq(l, "ref")) { |
3518 | ||
3519 | r = strv_extend(&u->deserialized_refs, v); | |
3520 | if (r < 0) | |
3521 | log_oom(); | |
3522 | ||
4b58153d LP |
3523 | continue; |
3524 | } else if (streq(l, "invocation-id")) { | |
3525 | sd_id128_t id; | |
3526 | ||
3527 | r = sd_id128_from_string(v, &id); | |
3528 | if (r < 0) | |
3529 | log_unit_debug(u, "Failed to parse invocation id %s, ignoring.", v); | |
3530 | else { | |
3531 | r = unit_set_invocation_id(u, id); | |
3532 | if (r < 0) | |
3533 | log_unit_warning_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
3534 | } | |
3535 | ||
00d9ef85 | 3536 | continue; |
8aaf019b | 3537 | } |
cca098b0 | 3538 | |
6b659ed8 LP |
3539 | /* Check if this is an IP accounting metric serialization field */ |
3540 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) | |
3541 | if (streq(l, ip_accounting_metric_field[m])) | |
3542 | break; | |
3543 | if (m < _CGROUP_IP_ACCOUNTING_METRIC_MAX) { | |
3544 | uint64_t c; | |
3545 | ||
3546 | r = safe_atou64(v, &c); | |
3547 | if (r < 0) | |
3548 | log_unit_debug(u, "Failed to parse IP accounting value %s, ignoring.", v); | |
3549 | else | |
3550 | u->ip_accounting_extra[m] = c; | |
3551 | continue; | |
3552 | } | |
3553 | ||
9bdb98c5 | 3554 | if (unit_can_serialize(u)) { |
e8a565cb YW |
3555 | r = exec_runtime_deserialize_compat(u, l, v, fds); |
3556 | if (r < 0) { | |
3557 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); | |
3558 | continue; | |
9bdb98c5 LP |
3559 | } |
3560 | ||
e8a565cb YW |
3561 | /* Returns positive if key was handled by the call */ |
3562 | if (r > 0) | |
3563 | continue; | |
3564 | ||
9bdb98c5 | 3565 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); |
613b411c | 3566 | if (r < 0) |
f2341e0a | 3567 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 3568 | } |
a16e1123 | 3569 | } |
a483fb59 LP |
3570 | |
3571 | /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is | |
3572 | * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from | |
1f133e0d | 3573 | * before 228 where the base for timeouts was not persistent across reboots. */ |
a483fb59 LP |
3574 | |
3575 | if (!dual_timestamp_is_set(&u->state_change_timestamp)) | |
3576 | dual_timestamp_get(&u->state_change_timestamp); | |
3577 | ||
58d83430 LP |
3578 | /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied |
3579 | * after we are done. For that we invalidate anything already realized, so that we can realize it again. */ | |
3580 | unit_invalidate_cgroup(u, _CGROUP_MASK_ALL); | |
3581 | unit_invalidate_cgroup_bpf(u); | |
3582 | ||
a483fb59 | 3583 | return 0; |
a16e1123 LP |
3584 | } |
3585 | ||
07429866 ZJS |
3586 | void unit_deserialize_skip(FILE *f) { |
3587 | assert(f); | |
3588 | ||
3589 | /* Skip serialized data for this unit. We don't know what it is. */ | |
3590 | ||
3591 | for (;;) { | |
3592 | char line[LINE_MAX], *l; | |
3593 | ||
3594 | if (!fgets(line, sizeof line, f)) | |
3595 | return; | |
3596 | ||
3597 | char_array_0(line); | |
3598 | l = strstrip(line); | |
3599 | ||
3600 | /* End marker */ | |
3601 | if (isempty(l)) | |
3602 | return; | |
3603 | } | |
3604 | } | |
3605 | ||
eef85c4a | 3606 | int unit_add_node_dependency(Unit *u, const char *what, bool wants, UnitDependency dep, UnitDependencyMask mask) { |
6e2ef85b | 3607 | Unit *device; |
68eda4bd | 3608 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
3609 | int r; |
3610 | ||
3611 | assert(u); | |
3612 | ||
6e2ef85b | 3613 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3614 | if (isempty(what)) |
3615 | return 0; | |
6e2ef85b | 3616 | |
8407a5d0 | 3617 | if (!is_device_path(what)) |
6e2ef85b LP |
3618 | return 0; |
3619 | ||
47bc12e1 LP |
3620 | /* When device units aren't supported (such as in a |
3621 | * container), don't create dependencies on them. */ | |
1c2e9646 | 3622 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3623 | return 0; |
3624 | ||
7410616c LP |
3625 | r = unit_name_from_path(what, ".device", &e); |
3626 | if (r < 0) | |
3627 | return r; | |
6e2ef85b | 3628 | |
ac155bb8 | 3629 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3630 | if (r < 0) |
3631 | return r; | |
3632 | ||
ebc8968b FB |
3633 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3634 | dep = UNIT_BINDS_TO; | |
3635 | ||
9d06297e | 3636 | r = unit_add_two_dependencies(u, UNIT_AFTER, |
463d0d15 | 3637 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, |
eef85c4a | 3638 | device, true, mask); |
faa368e3 | 3639 | if (r < 0) |
6e2ef85b LP |
3640 | return r; |
3641 | ||
faa368e3 | 3642 | if (wants) { |
eef85c4a | 3643 | r = unit_add_dependency(device, UNIT_WANTS, u, false, mask); |
faa368e3 | 3644 | if (r < 0) |
6e2ef85b | 3645 | return r; |
faa368e3 | 3646 | } |
6e2ef85b LP |
3647 | |
3648 | return 0; | |
3649 | } | |
a16e1123 | 3650 | |
be847e82 | 3651 | int unit_coldplug(Unit *u) { |
05a98afd LP |
3652 | int r = 0, q; |
3653 | char **i; | |
cca098b0 LP |
3654 | |
3655 | assert(u); | |
3656 | ||
f78f265f LP |
3657 | /* Make sure we don't enter a loop, when coldplugging |
3658 | * recursively. */ | |
3659 | if (u->coldplugged) | |
3660 | return 0; | |
3661 | ||
3662 | u->coldplugged = true; | |
3663 | ||
05a98afd LP |
3664 | STRV_FOREACH(i, u->deserialized_refs) { |
3665 | q = bus_unit_track_add_name(u, *i); | |
3666 | if (q < 0 && r >= 0) | |
3667 | r = q; | |
3668 | } | |
3669 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 3670 | |
05a98afd LP |
3671 | if (UNIT_VTABLE(u)->coldplug) { |
3672 | q = UNIT_VTABLE(u)->coldplug(u); | |
3673 | if (q < 0 && r >= 0) | |
3674 | r = q; | |
3675 | } | |
5a6158b6 | 3676 | |
05a98afd LP |
3677 | if (u->job) { |
3678 | q = job_coldplug(u->job); | |
3679 | if (q < 0 && r >= 0) | |
3680 | r = q; | |
3681 | } | |
cca098b0 | 3682 | |
05a98afd | 3683 | return r; |
cca098b0 LP |
3684 | } |
3685 | ||
ba25d39e | 3686 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3687 | struct stat st; |
3688 | ||
3689 | if (!path) | |
3690 | return false; | |
3691 | ||
77969722 LP |
3692 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3693 | * are never out-of-date. */ | |
3694 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3695 | return false; | |
3696 | ||
21b95806 ZJS |
3697 | if (stat(path, &st) < 0) |
3698 | /* What, cannot access this anymore? */ | |
3699 | return true; | |
3700 | ||
ba25d39e ZJS |
3701 | if (path_masked) |
3702 | /* For masked files check if they are still so */ | |
3703 | return !null_or_empty(&st); | |
3704 | else | |
3a8db9fe | 3705 | /* For non-empty files check the mtime */ |
87ec20ef | 3706 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3707 | |
3708 | return false; | |
3709 | } | |
3710 | ||
45fb0699 | 3711 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
3712 | _cleanup_strv_free_ char **t = NULL; |
3713 | char **path; | |
1b64d026 | 3714 | |
45fb0699 LP |
3715 | assert(u); |
3716 | ||
ba25d39e ZJS |
3717 | /* For unit files, we allow masking… */ |
3718 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3719 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3720 | return true; |
5f4b19f4 | 3721 | |
ba25d39e ZJS |
3722 | /* Source paths should not be masked… */ |
3723 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3724 | return true; |
ae7a7182 | 3725 | |
19a44dfe LR |
3726 | if (u->load_state == UNIT_LOADED) |
3727 | (void) unit_find_dropin_paths(u, &t); | |
ab932a62 LP |
3728 | if (!strv_equal(u->dropin_paths, t)) |
3729 | return true; | |
6d10d308 | 3730 | |
ba25d39e | 3731 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3732 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3733 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3734 | return true; |
21b95806 | 3735 | |
ab932a62 | 3736 | return false; |
45fb0699 LP |
3737 | } |
3738 | ||
fdf20a31 | 3739 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3740 | assert(u); |
3741 | ||
fdf20a31 MM |
3742 | if (UNIT_VTABLE(u)->reset_failed) |
3743 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 LP |
3744 | |
3745 | RATELIMIT_RESET(u->start_limit); | |
3746 | u->start_limit_hit = false; | |
5632e374 LP |
3747 | } |
3748 | ||
a7f241db LP |
3749 | Unit *unit_following(Unit *u) { |
3750 | assert(u); | |
3751 | ||
3752 | if (UNIT_VTABLE(u)->following) | |
3753 | return UNIT_VTABLE(u)->following(u); | |
3754 | ||
3755 | return NULL; | |
3756 | } | |
3757 | ||
31afa0a4 | 3758 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3759 | assert(u); |
3760 | ||
31afa0a4 LP |
3761 | /* This call does check the current state of the unit. It's |
3762 | * hence useful to be called from state change calls of the | |
3763 | * unit itself, where the state isn't updated yet. This is | |
3764 | * different from unit_inactive_or_pending() which checks both | |
3765 | * the current state and for a queued job. */ | |
18ffdfda | 3766 | |
31afa0a4 LP |
3767 | return u->job && u->job->type == JOB_STOP; |
3768 | } | |
3769 | ||
3770 | bool unit_inactive_or_pending(Unit *u) { | |
3771 | assert(u); | |
3772 | ||
3773 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3774 | |
d956ac29 LP |
3775 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3776 | return true; | |
3777 | ||
31afa0a4 | 3778 | if (unit_stop_pending(u)) |
18ffdfda LP |
3779 | return true; |
3780 | ||
3781 | return false; | |
3782 | } | |
3783 | ||
31afa0a4 | 3784 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3785 | assert(u); |
3786 | ||
f60c2665 | 3787 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3788 | |
3789 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3790 | return true; | |
3791 | ||
ac155bb8 | 3792 | if (u->job && |
3742095b | 3793 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
3794 | return true; |
3795 | ||
3796 | return false; | |
3797 | } | |
3798 | ||
deb4e708 MK |
3799 | bool unit_will_restart(Unit *u) { |
3800 | assert(u); | |
3801 | ||
3802 | if (!UNIT_VTABLE(u)->will_restart) | |
3803 | return false; | |
3804 | ||
3805 | return UNIT_VTABLE(u)->will_restart(u); | |
3806 | } | |
3807 | ||
718db961 | 3808 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3809 | assert(u); |
3810 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 3811 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 3812 | |
8a0867d6 | 3813 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3814 | return -EOPNOTSUPP; |
8a0867d6 | 3815 | |
c74f17d9 | 3816 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3817 | } |
3818 | ||
82659fd7 | 3819 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
af4fa99d | 3820 | _cleanup_set_free_ Set *pid_set = NULL; |
82659fd7 LP |
3821 | int r; |
3822 | ||
d5099efc | 3823 | pid_set = set_new(NULL); |
82659fd7 LP |
3824 | if (!pid_set) |
3825 | return NULL; | |
3826 | ||
3827 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3828 | if (main_pid > 0) { | |
fea72cc0 | 3829 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 | 3830 | if (r < 0) |
95f14a3e | 3831 | return NULL; |
82659fd7 LP |
3832 | } |
3833 | ||
3834 | if (control_pid > 0) { | |
fea72cc0 | 3835 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 | 3836 | if (r < 0) |
95f14a3e | 3837 | return NULL; |
82659fd7 LP |
3838 | } |
3839 | ||
95f14a3e | 3840 | return TAKE_PTR(pid_set); |
82659fd7 LP |
3841 | } |
3842 | ||
d91c34f2 LP |
3843 | int unit_kill_common( |
3844 | Unit *u, | |
3845 | KillWho who, | |
3846 | int signo, | |
3847 | pid_t main_pid, | |
3848 | pid_t control_pid, | |
718db961 | 3849 | sd_bus_error *error) { |
d91c34f2 | 3850 | |
814cc562 | 3851 | int r = 0; |
ac5e3a50 | 3852 | bool killed = false; |
814cc562 | 3853 | |
ac5e3a50 | 3854 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3855 | if (main_pid < 0) |
7358dc02 | 3856 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 3857 | else if (main_pid == 0) |
7358dc02 | 3858 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3859 | } |
3860 | ||
ac5e3a50 | 3861 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3862 | if (control_pid < 0) |
7358dc02 | 3863 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 3864 | else if (control_pid == 0) |
7358dc02 | 3865 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3866 | } |
3867 | ||
ac5e3a50 JS |
3868 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3869 | if (control_pid > 0) { | |
814cc562 MS |
3870 | if (kill(control_pid, signo) < 0) |
3871 | r = -errno; | |
ac5e3a50 JS |
3872 | else |
3873 | killed = true; | |
3874 | } | |
814cc562 | 3875 | |
ac5e3a50 JS |
3876 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3877 | if (main_pid > 0) { | |
814cc562 MS |
3878 | if (kill(main_pid, signo) < 0) |
3879 | r = -errno; | |
ac5e3a50 JS |
3880 | else |
3881 | killed = true; | |
3882 | } | |
814cc562 | 3883 | |
ac5e3a50 | 3884 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3885 | _cleanup_set_free_ Set *pid_set = NULL; |
3886 | int q; | |
3887 | ||
82659fd7 LP |
3888 | /* Exclude the main/control pids from being killed via the cgroup */ |
3889 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3890 | if (!pid_set) |
3891 | return -ENOMEM; | |
3892 | ||
1d98fef1 | 3893 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, NULL, NULL); |
4c701096 | 3894 | if (q < 0 && !IN_SET(q, -EAGAIN, -ESRCH, -ENOENT)) |
814cc562 | 3895 | r = q; |
ac5e3a50 JS |
3896 | else |
3897 | killed = true; | |
814cc562 MS |
3898 | } |
3899 | ||
201f0c91 | 3900 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL)) |
ac5e3a50 JS |
3901 | return -ESRCH; |
3902 | ||
814cc562 MS |
3903 | return r; |
3904 | } | |
3905 | ||
6210e7fc LP |
3906 | int unit_following_set(Unit *u, Set **s) { |
3907 | assert(u); | |
3908 | assert(s); | |
3909 | ||
3910 | if (UNIT_VTABLE(u)->following_set) | |
3911 | return UNIT_VTABLE(u)->following_set(u, s); | |
3912 | ||
3913 | *s = NULL; | |
3914 | return 0; | |
3915 | } | |
3916 | ||
a4375746 | 3917 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
3918 | int r; |
3919 | ||
a4375746 LP |
3920 | assert(u); |
3921 | ||
0ec0deaa LP |
3922 | if (u->unit_file_state < 0 && u->fragment_path) { |
3923 | r = unit_file_get_state( | |
463d0d15 | 3924 | u->manager->unit_file_scope, |
0ec0deaa | 3925 | NULL, |
9ea3a0e7 | 3926 | u->id, |
0ec0deaa LP |
3927 | &u->unit_file_state); |
3928 | if (r < 0) | |
3929 | u->unit_file_state = UNIT_FILE_BAD; | |
3930 | } | |
a4375746 | 3931 | |
ac155bb8 | 3932 | return u->unit_file_state; |
a4375746 LP |
3933 | } |
3934 | ||
d2dc52db LP |
3935 | int unit_get_unit_file_preset(Unit *u) { |
3936 | assert(u); | |
3937 | ||
3938 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3939 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 3940 | u->manager->unit_file_scope, |
0ec0deaa LP |
3941 | NULL, |
3942 | basename(u->fragment_path)); | |
d2dc52db LP |
3943 | |
3944 | return u->unit_file_preset; | |
3945 | } | |
3946 | ||
7f7d01ed | 3947 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 3948 | assert(ref); |
7f7d01ed ZJS |
3949 | assert(source); |
3950 | assert(target); | |
57020a3a | 3951 | |
7f7d01ed | 3952 | if (ref->target) |
57020a3a LP |
3953 | unit_ref_unset(ref); |
3954 | ||
7f7d01ed ZJS |
3955 | ref->source = source; |
3956 | ref->target = target; | |
3957 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
3958 | return target; | |
57020a3a LP |
3959 | } |
3960 | ||
3961 | void unit_ref_unset(UnitRef *ref) { | |
3962 | assert(ref); | |
3963 | ||
7f7d01ed | 3964 | if (!ref->target) |
57020a3a LP |
3965 | return; |
3966 | ||
b75102e5 LP |
3967 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
3968 | * be unreferenced now. */ | |
7f7d01ed | 3969 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 3970 | |
7f7d01ed ZJS |
3971 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
3972 | ref->source = ref->target = NULL; | |
57020a3a LP |
3973 | } |
3974 | ||
29206d46 LP |
3975 | static int user_from_unit_name(Unit *u, char **ret) { |
3976 | ||
3977 | static const uint8_t hash_key[] = { | |
3978 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
3979 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
3980 | }; | |
3981 | ||
3982 | _cleanup_free_ char *n = NULL; | |
3983 | int r; | |
3984 | ||
3985 | r = unit_name_to_prefix(u->id, &n); | |
3986 | if (r < 0) | |
3987 | return r; | |
3988 | ||
3989 | if (valid_user_group_name(n)) { | |
ae2a15bc | 3990 | *ret = TAKE_PTR(n); |
29206d46 LP |
3991 | return 0; |
3992 | } | |
3993 | ||
3994 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
3995 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
3996 | return -ENOMEM; | |
3997 | ||
3998 | return 0; | |
3999 | } | |
4000 | ||
598459ce LP |
4001 | int unit_patch_contexts(Unit *u) { |
4002 | CGroupContext *cc; | |
4003 | ExecContext *ec; | |
cba6e062 LP |
4004 | unsigned i; |
4005 | int r; | |
4006 | ||
e06c73cc | 4007 | assert(u); |
e06c73cc | 4008 | |
598459ce LP |
4009 | /* Patch in the manager defaults into the exec and cgroup |
4010 | * contexts, _after_ the rest of the settings have been | |
4011 | * initialized */ | |
085afe36 | 4012 | |
598459ce LP |
4013 | ec = unit_get_exec_context(u); |
4014 | if (ec) { | |
4015 | /* This only copies in the ones that need memory */ | |
4016 | for (i = 0; i < _RLIMIT_MAX; i++) | |
4017 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
4018 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
4019 | if (!ec->rlimit[i]) | |
4020 | return -ENOMEM; | |
4021 | } | |
4022 | ||
463d0d15 | 4023 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4024 | !ec->working_directory) { |
4025 | ||
4026 | r = get_home_dir(&ec->working_directory); | |
4027 | if (r < 0) | |
4028 | return r; | |
4c08c824 LP |
4029 | |
4030 | /* Allow user services to run, even if the | |
4031 | * home directory is missing */ | |
4032 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4033 | } |
4034 | ||
598459ce | 4035 | if (ec->private_devices) |
2cd0a735 | 4036 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4037 | |
4038 | if (ec->protect_kernel_modules) | |
4039 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 LP |
4040 | |
4041 | if (ec->dynamic_user) { | |
4042 | if (!ec->user) { | |
4043 | r = user_from_unit_name(u, &ec->user); | |
4044 | if (r < 0) | |
4045 | return r; | |
4046 | } | |
4047 | ||
4048 | if (!ec->group) { | |
4049 | ec->group = strdup(ec->user); | |
4050 | if (!ec->group) | |
4051 | return -ENOMEM; | |
4052 | } | |
4053 | ||
63bb64a0 LP |
4054 | /* If the dynamic user option is on, let's make sure that the unit can't leave its UID/GID |
4055 | * around in the file system or on IPC objects. Hence enforce a strict sandbox. */ | |
4056 | ||
29206d46 | 4057 | ec->private_tmp = true; |
00d9ef85 | 4058 | ec->remove_ipc = true; |
63bb64a0 LP |
4059 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4060 | if (ec->protect_home == PROTECT_HOME_NO) | |
4061 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
29206d46 | 4062 | } |
cba6e062 LP |
4063 | } |
4064 | ||
598459ce LP |
4065 | cc = unit_get_cgroup_context(u); |
4066 | if (cc) { | |
f513e420 | 4067 | |
598459ce LP |
4068 | if (ec && |
4069 | ec->private_devices && | |
4070 | cc->device_policy == CGROUP_AUTO) | |
4071 | cc->device_policy = CGROUP_CLOSED; | |
4072 | } | |
f1660f96 | 4073 | |
cba6e062 | 4074 | return 0; |
e06c73cc LP |
4075 | } |
4076 | ||
3ef63c31 LP |
4077 | ExecContext *unit_get_exec_context(Unit *u) { |
4078 | size_t offset; | |
4079 | assert(u); | |
4080 | ||
598459ce LP |
4081 | if (u->type < 0) |
4082 | return NULL; | |
4083 | ||
3ef63c31 LP |
4084 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4085 | if (offset <= 0) | |
4086 | return NULL; | |
4087 | ||
4088 | return (ExecContext*) ((uint8_t*) u + offset); | |
4089 | } | |
4090 | ||
718db961 LP |
4091 | KillContext *unit_get_kill_context(Unit *u) { |
4092 | size_t offset; | |
4093 | assert(u); | |
4094 | ||
598459ce LP |
4095 | if (u->type < 0) |
4096 | return NULL; | |
4097 | ||
718db961 LP |
4098 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4099 | if (offset <= 0) | |
4100 | return NULL; | |
4101 | ||
4102 | return (KillContext*) ((uint8_t*) u + offset); | |
4103 | } | |
4104 | ||
4ad49000 LP |
4105 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4106 | size_t offset; | |
4107 | ||
598459ce LP |
4108 | if (u->type < 0) |
4109 | return NULL; | |
4110 | ||
4ad49000 LP |
4111 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4112 | if (offset <= 0) | |
4113 | return NULL; | |
4114 | ||
4115 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4116 | } | |
4117 | ||
613b411c LP |
4118 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4119 | size_t offset; | |
4120 | ||
598459ce LP |
4121 | if (u->type < 0) |
4122 | return NULL; | |
4123 | ||
613b411c LP |
4124 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4125 | if (offset <= 0) | |
4126 | return NULL; | |
4127 | ||
4128 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4129 | } | |
4130 | ||
2e59b241 | 4131 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4132 | assert(u); |
4133 | ||
2e59b241 | 4134 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4135 | return NULL; |
4136 | ||
39591351 LP |
4137 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4138 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4139 | |
2e59b241 | 4140 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4141 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4142 | |
2e59b241 LP |
4143 | if (flags & UNIT_RUNTIME) |
4144 | return u->manager->lookup_paths.runtime_control; | |
4145 | ||
39591351 | 4146 | return NULL; |
71645aca LP |
4147 | } |
4148 | ||
2e59b241 LP |
4149 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4150 | char *ret = NULL; | |
4151 | ||
4152 | if (!s) | |
4153 | return NULL; | |
4154 | ||
4155 | /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated | |
4156 | * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is | |
4157 | * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly | |
4158 | * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is | |
4159 | * not specified, then the return value always needs to be freed. Callers can use this to optimize memory | |
4160 | * allocations. */ | |
4161 | ||
4162 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
4163 | ret = specifier_escape(s); | |
4164 | if (!ret) | |
4165 | return NULL; | |
4166 | ||
4167 | s = ret; | |
4168 | } | |
4169 | ||
4170 | if (flags & UNIT_ESCAPE_C) { | |
4171 | char *a; | |
4172 | ||
4173 | a = cescape(s); | |
4174 | free(ret); | |
4175 | if (!a) | |
4176 | return NULL; | |
4177 | ||
4178 | ret = a; | |
4179 | } | |
4180 | ||
4181 | if (buf) { | |
4182 | *buf = ret; | |
4183 | return ret ?: (char*) s; | |
4184 | } | |
4185 | ||
4186 | return ret ?: strdup(s); | |
4187 | } | |
4188 | ||
4189 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4190 | _cleanup_free_ char *result = NULL; | |
4191 | size_t n = 0, allocated = 0; | |
ae2a15bc | 4192 | char **i; |
2e59b241 LP |
4193 | |
4194 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a | |
4195 | * way suitable for ExecStart= stanzas */ | |
4196 | ||
4197 | STRV_FOREACH(i, l) { | |
4198 | _cleanup_free_ char *buf = NULL; | |
4199 | const char *p; | |
4200 | size_t a; | |
4201 | char *q; | |
4202 | ||
4203 | p = unit_escape_setting(*i, flags, &buf); | |
4204 | if (!p) | |
4205 | return NULL; | |
4206 | ||
4207 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
4208 | if (!GREEDY_REALLOC(result, allocated, n + a + 1)) | |
4209 | return NULL; | |
4210 | ||
4211 | q = result + n; | |
4212 | if (n > 0) | |
4213 | *(q++) = ' '; | |
4214 | ||
4215 | *(q++) = '"'; | |
4216 | q = stpcpy(q, p); | |
4217 | *(q++) = '"'; | |
4218 | ||
4219 | n += a; | |
4220 | } | |
4221 | ||
4222 | if (!GREEDY_REALLOC(result, allocated, n + 1)) | |
4223 | return NULL; | |
4224 | ||
4225 | result[n] = 0; | |
4226 | ||
ae2a15bc | 4227 | return TAKE_PTR(result); |
2e59b241 LP |
4228 | } |
4229 | ||
4230 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4231 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4232 | const char *dir, *wrapped; |
26d04f86 | 4233 | int r; |
71645aca LP |
4234 | |
4235 | assert(u); | |
2e59b241 LP |
4236 | assert(name); |
4237 | assert(data); | |
4238 | ||
4239 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4240 | return 0; | |
4241 | ||
4242 | data = unit_escape_setting(data, flags, &escaped); | |
4243 | if (!data) | |
4244 | return -ENOMEM; | |
4245 | ||
4246 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4247 | * previous section header is the same */ | |
4248 | ||
4249 | if (flags & UNIT_PRIVATE) { | |
4250 | if (!UNIT_VTABLE(u)->private_section) | |
4251 | return -EINVAL; | |
4252 | ||
4253 | if (!u->transient_file || u->last_section_private < 0) | |
4254 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4255 | else if (u->last_section_private == 0) | |
4256 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4257 | } else { | |
4258 | if (!u->transient_file || u->last_section_private < 0) | |
4259 | data = strjoina("[Unit]\n", data); | |
4260 | else if (u->last_section_private > 0) | |
4261 | data = strjoina("\n[Unit]\n", data); | |
4262 | } | |
71645aca | 4263 | |
4f4afc88 LP |
4264 | if (u->transient_file) { |
4265 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4266 | * write to the transient unit file. */ | |
4267 | fputs(data, u->transient_file); | |
4f4afc88 | 4268 | |
2e59b241 LP |
4269 | if (!endswith(data, "\n")) |
4270 | fputc('\n', u->transient_file); | |
4271 | ||
4272 | /* Remember which section we wrote this entry to */ | |
4273 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4274 | return 0; |
2e59b241 | 4275 | } |
8e2af478 | 4276 | |
2e59b241 | 4277 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4278 | if (!dir) |
4279 | return -EINVAL; | |
71645aca | 4280 | |
2a9a6f8a | 4281 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4282 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4283 | data, |
4284 | "\n"); | |
e20b2a86 | 4285 | |
815b09d3 | 4286 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4287 | if (r < 0) |
4288 | return r; | |
4289 | ||
45639f1b | 4290 | (void) mkdir_p_label(p, 0755); |
2a9a6f8a | 4291 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4292 | if (r < 0) |
4293 | return r; | |
4294 | ||
815b09d3 | 4295 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4296 | if (r < 0) |
4297 | return r; | |
815b09d3 | 4298 | q = NULL; |
adb76a70 | 4299 | |
adb76a70 WC |
4300 | strv_uniq(u->dropin_paths); |
4301 | ||
4302 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4303 | ||
4304 | return 0; | |
26d04f86 | 4305 | } |
71645aca | 4306 | |
2e59b241 | 4307 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4308 | _cleanup_free_ char *p = NULL; |
4309 | va_list ap; | |
4310 | int r; | |
4311 | ||
4312 | assert(u); | |
4313 | assert(name); | |
4314 | assert(format); | |
4315 | ||
2e59b241 | 4316 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4317 | return 0; |
4318 | ||
4319 | va_start(ap, format); | |
4320 | r = vasprintf(&p, format, ap); | |
4321 | va_end(ap); | |
4322 | ||
4323 | if (r < 0) | |
4324 | return -ENOMEM; | |
4325 | ||
2e59b241 | 4326 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4327 | } |
71645aca | 4328 | |
c2756a68 | 4329 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4330 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4331 | FILE *f; |
4f4afc88 | 4332 | |
c2756a68 LP |
4333 | assert(u); |
4334 | ||
3f5e8115 LP |
4335 | if (!UNIT_VTABLE(u)->can_transient) |
4336 | return -EOPNOTSUPP; | |
4337 | ||
45639f1b LP |
4338 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4339 | ||
605405c6 | 4340 | path = strjoin(u->manager->lookup_paths.transient, "/", u->id); |
4f4afc88 LP |
4341 | if (!path) |
4342 | return -ENOMEM; | |
4343 | ||
4344 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4345 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4346 | ||
78e334b5 | 4347 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 4348 | f = fopen(path, "we"); |
0126c8f3 | 4349 | if (!f) |
78e334b5 | 4350 | return -errno; |
4f4afc88 LP |
4351 | } |
4352 | ||
0126c8f3 | 4353 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4354 | u->transient_file = f; |
4355 | ||
0126c8f3 | 4356 | free_and_replace(u->fragment_path, path); |
7c65093a | 4357 | |
7c65093a LP |
4358 | u->source_path = mfree(u->source_path); |
4359 | u->dropin_paths = strv_free(u->dropin_paths); | |
4360 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4361 | ||
4f4afc88 LP |
4362 | u->load_state = UNIT_STUB; |
4363 | u->load_error = 0; | |
4364 | u->transient = true; | |
4365 | ||
7c65093a LP |
4366 | unit_add_to_dbus_queue(u); |
4367 | unit_add_to_gc_queue(u); | |
c2756a68 | 4368 | |
4f4afc88 LP |
4369 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4370 | u->transient_file); | |
4371 | ||
3f5e8115 | 4372 | return 0; |
c2756a68 LP |
4373 | } |
4374 | ||
1d98fef1 LP |
4375 | static void log_kill(pid_t pid, int sig, void *userdata) { |
4376 | _cleanup_free_ char *comm = NULL; | |
4377 | ||
4378 | (void) get_process_comm(pid, &comm); | |
4379 | ||
4380 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4381 | only, like for example systemd's own PAM stub process. */ | |
4382 | if (comm && comm[0] == '(') | |
4383 | return; | |
4384 | ||
4385 | log_unit_notice(userdata, | |
4386 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4387 | pid, | |
4388 | strna(comm), | |
4389 | signal_to_string(sig)); | |
4390 | } | |
4391 | ||
4392 | static int operation_to_signal(KillContext *c, KillOperation k) { | |
4393 | assert(c); | |
4394 | ||
4395 | switch (k) { | |
4396 | ||
4397 | case KILL_TERMINATE: | |
4398 | case KILL_TERMINATE_AND_LOG: | |
4399 | return c->kill_signal; | |
4400 | ||
4401 | case KILL_KILL: | |
4402 | return SIGKILL; | |
4403 | ||
4404 | case KILL_ABORT: | |
4405 | return SIGABRT; | |
4406 | ||
4407 | default: | |
4408 | assert_not_reached("KillOperation unknown"); | |
4409 | } | |
4410 | } | |
4411 | ||
cd2086fe LP |
4412 | int unit_kill_context( |
4413 | Unit *u, | |
4414 | KillContext *c, | |
db2cb23b | 4415 | KillOperation k, |
cd2086fe LP |
4416 | pid_t main_pid, |
4417 | pid_t control_pid, | |
4418 | bool main_pid_alien) { | |
4419 | ||
1d98fef1 | 4420 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4421 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4422 | int sig, r; |
cd2086fe LP |
4423 | |
4424 | assert(u); | |
4425 | assert(c); | |
4426 | ||
59ec09a8 ZJS |
4427 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. |
4428 | * Returns > 0 if we killed something worth waiting for, 0 otherwise. */ | |
1d98fef1 | 4429 | |
cd2086fe LP |
4430 | if (c->kill_mode == KILL_NONE) |
4431 | return 0; | |
4432 | ||
1d98fef1 LP |
4433 | sig = operation_to_signal(c, k); |
4434 | ||
4435 | send_sighup = | |
4436 | c->send_sighup && | |
4437 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4438 | sig != SIGHUP; | |
4439 | ||
59ec09a8 ZJS |
4440 | if (k != KILL_TERMINATE || IN_SET(sig, SIGKILL, SIGABRT)) |
4441 | log_func = log_kill; | |
cd2086fe LP |
4442 | |
4443 | if (main_pid > 0) { | |
1d98fef1 LP |
4444 | if (log_func) |
4445 | log_func(main_pid, sig, u); | |
cd2086fe | 4446 | |
1d98fef1 | 4447 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4448 | if (r < 0 && r != -ESRCH) { |
4449 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4450 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 4451 | |
b821a397 | 4452 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 4453 | } else { |
bc6aed7b LP |
4454 | if (!main_pid_alien) |
4455 | wait_for_exit = true; | |
82659fd7 | 4456 | |
1d98fef1 | 4457 | if (r != -ESRCH && send_sighup) |
d0667321 | 4458 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 4459 | } |
cd2086fe LP |
4460 | } |
4461 | ||
4462 | if (control_pid > 0) { | |
1d98fef1 LP |
4463 | if (log_func) |
4464 | log_func(control_pid, sig, u); | |
cd2086fe | 4465 | |
1d98fef1 | 4466 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4467 | if (r < 0 && r != -ESRCH) { |
4468 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4469 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 4470 | |
b821a397 | 4471 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 4472 | } else { |
cd2086fe | 4473 | wait_for_exit = true; |
82659fd7 | 4474 | |
1d98fef1 | 4475 | if (r != -ESRCH && send_sighup) |
d0667321 | 4476 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 4477 | } |
cd2086fe LP |
4478 | } |
4479 | ||
b821a397 LP |
4480 | if (u->cgroup_path && |
4481 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4482 | _cleanup_set_free_ Set *pid_set = NULL; |
4483 | ||
82659fd7 LP |
4484 | /* Exclude the main/control pids from being killed via the cgroup */ |
4485 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4486 | if (!pid_set) |
4487 | return -ENOMEM; | |
4488 | ||
1d98fef1 LP |
4489 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4490 | sig, | |
4491 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4492 | pid_set, | |
4493 | log_func, u); | |
cd2086fe | 4494 | if (r < 0) { |
4c701096 | 4495 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
b821a397 LP |
4496 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
4497 | ||
82659fd7 | 4498 | } else if (r > 0) { |
bc6aed7b | 4499 | |
1d9cc876 LP |
4500 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4501 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
4502 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
4503 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
4504 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
4505 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 4506 | |
c22800e4 | 4507 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 4508 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 4509 | wait_for_exit = true; |
58ea275a | 4510 | |
1d98fef1 | 4511 | if (send_sighup) { |
82659fd7 LP |
4512 | set_free(pid_set); |
4513 | ||
4514 | pid_set = unit_pid_set(main_pid, control_pid); | |
4515 | if (!pid_set) | |
4516 | return -ENOMEM; | |
4517 | ||
1d98fef1 LP |
4518 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4519 | SIGHUP, | |
4520 | CGROUP_IGNORE_SELF, | |
4521 | pid_set, | |
4522 | NULL, NULL); | |
82659fd7 LP |
4523 | } |
4524 | } | |
cd2086fe LP |
4525 | } |
4526 | ||
4527 | return wait_for_exit; | |
4528 | } | |
4529 | ||
eef85c4a | 4530 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
ca8700e9 ZJS |
4531 | _cleanup_free_ char *p = NULL; |
4532 | char *prefix; | |
eef85c4a | 4533 | UnitDependencyInfo di; |
a57f7e2c LP |
4534 | int r; |
4535 | ||
4536 | assert(u); | |
4537 | assert(path); | |
4538 | ||
eef85c4a LP |
4539 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in |
4540 | * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to | |
4541 | * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily | |
4542 | * determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4543 | |
70b64bd3 ZJS |
4544 | if (!path_is_absolute(path)) |
4545 | return -EINVAL; | |
4546 | ||
548f6937 | 4547 | r = hashmap_ensure_allocated(&u->requires_mounts_for, &path_hash_ops); |
eef85c4a LP |
4548 | if (r < 0) |
4549 | return r; | |
4550 | ||
a57f7e2c LP |
4551 | p = strdup(path); |
4552 | if (!p) | |
4553 | return -ENOMEM; | |
4554 | ||
ca8700e9 | 4555 | path = path_kill_slashes(p); |
a57f7e2c | 4556 | |
ca8700e9 | 4557 | if (!path_is_normalized(path)) |
a57f7e2c | 4558 | return -EPERM; |
a57f7e2c | 4559 | |
ca8700e9 | 4560 | if (hashmap_contains(u->requires_mounts_for, path)) |
a57f7e2c | 4561 | return 0; |
a57f7e2c | 4562 | |
eef85c4a LP |
4563 | di = (UnitDependencyInfo) { |
4564 | .origin_mask = mask | |
4565 | }; | |
4566 | ||
ca8700e9 ZJS |
4567 | r = hashmap_put(u->requires_mounts_for, path, di.data); |
4568 | if (r < 0) | |
a57f7e2c | 4569 | return r; |
ca8700e9 | 4570 | p = NULL; |
a57f7e2c | 4571 | |
ca8700e9 ZJS |
4572 | prefix = alloca(strlen(path) + 1); |
4573 | PATH_FOREACH_PREFIX_MORE(prefix, path) { | |
a57f7e2c LP |
4574 | Set *x; |
4575 | ||
4576 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4577 | if (!x) { | |
ca8700e9 | 4578 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 4579 | |
548f6937 | 4580 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
742f41ad LP |
4581 | if (r < 0) |
4582 | return r; | |
a57f7e2c LP |
4583 | |
4584 | q = strdup(prefix); | |
4585 | if (!q) | |
4586 | return -ENOMEM; | |
4587 | ||
d5099efc | 4588 | x = set_new(NULL); |
ca8700e9 | 4589 | if (!x) |
a57f7e2c | 4590 | return -ENOMEM; |
a57f7e2c LP |
4591 | |
4592 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4593 | if (r < 0) { | |
a57f7e2c LP |
4594 | set_free(x); |
4595 | return r; | |
4596 | } | |
ca8700e9 | 4597 | q = NULL; |
a57f7e2c LP |
4598 | } |
4599 | ||
4600 | r = set_put(x, u); | |
4601 | if (r < 0) | |
4602 | return r; | |
4603 | } | |
4604 | ||
4605 | return 0; | |
4606 | } | |
4607 | ||
613b411c LP |
4608 | int unit_setup_exec_runtime(Unit *u) { |
4609 | ExecRuntime **rt; | |
4610 | size_t offset; | |
613b411c | 4611 | Unit *other; |
eef85c4a LP |
4612 | Iterator i; |
4613 | void *v; | |
e8a565cb | 4614 | int r; |
613b411c LP |
4615 | |
4616 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4617 | assert(offset > 0); | |
4618 | ||
06b643e7 | 4619 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
4620 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
4621 | if (*rt) | |
4622 | return 0; | |
4623 | ||
4624 | /* Try to get it from somebody else */ | |
eef85c4a | 4625 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { |
e8a565cb YW |
4626 | r = exec_runtime_acquire(u->manager, NULL, other->id, false, rt); |
4627 | if (r == 1) | |
4628 | return 1; | |
613b411c LP |
4629 | } |
4630 | ||
e8a565cb | 4631 | return exec_runtime_acquire(u->manager, unit_get_exec_context(u), u->id, true, rt); |
613b411c LP |
4632 | } |
4633 | ||
29206d46 LP |
4634 | int unit_setup_dynamic_creds(Unit *u) { |
4635 | ExecContext *ec; | |
4636 | DynamicCreds *dcreds; | |
4637 | size_t offset; | |
4638 | ||
4639 | assert(u); | |
4640 | ||
4641 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
4642 | assert(offset > 0); | |
4643 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
4644 | ||
4645 | ec = unit_get_exec_context(u); | |
4646 | assert(ec); | |
4647 | ||
4648 | if (!ec->dynamic_user) | |
4649 | return 0; | |
4650 | ||
4651 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
4652 | } | |
4653 | ||
1c2e9646 LP |
4654 | bool unit_type_supported(UnitType t) { |
4655 | if (_unlikely_(t < 0)) | |
4656 | return false; | |
4657 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
4658 | return false; | |
4659 | ||
4660 | if (!unit_vtable[t]->supported) | |
4661 | return true; | |
4662 | ||
4663 | return unit_vtable[t]->supported(); | |
4664 | } | |
4665 | ||
8b4305c7 LP |
4666 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
4667 | int r; | |
4668 | ||
4669 | assert(u); | |
4670 | assert(where); | |
4671 | ||
4672 | r = dir_is_empty(where); | |
3f602115 | 4673 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
4674 | return; |
4675 | if (r < 0) { | |
4676 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
4677 | return; | |
4678 | } | |
4679 | ||
4680 | log_struct(LOG_NOTICE, | |
2b044526 | 4681 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4682 | LOG_UNIT_ID(u), |
f1c50bec | 4683 | LOG_UNIT_INVOCATION_ID(u), |
8b4305c7 LP |
4684 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), |
4685 | "WHERE=%s", where, | |
4686 | NULL); | |
4687 | } | |
4688 | ||
25cd4964 AJ |
4689 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
4690 | _cleanup_free_ char *canonical_where; | |
8b4305c7 LP |
4691 | int r; |
4692 | ||
4693 | assert(u); | |
4694 | assert(where); | |
4695 | ||
25cd4964 | 4696 | r = chase_symlinks(where, NULL, CHASE_NONEXISTENT, &canonical_where); |
8b4305c7 | 4697 | if (r < 0) { |
25cd4964 | 4698 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
4699 | return 0; |
4700 | } | |
25cd4964 AJ |
4701 | |
4702 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
4703 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
4704 | return 0; |
4705 | ||
25cd4964 | 4706 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
8b4305c7 | 4707 | log_struct(LOG_ERR, |
2b044526 | 4708 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4709 | LOG_UNIT_ID(u), |
f1c50bec | 4710 | LOG_UNIT_INVOCATION_ID(u), |
25cd4964 | 4711 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), |
8b4305c7 LP |
4712 | "WHERE=%s", where, |
4713 | NULL); | |
4714 | ||
4715 | return -ELOOP; | |
4716 | } | |
0f13f3bd LP |
4717 | |
4718 | bool unit_is_pristine(Unit *u) { | |
4719 | assert(u); | |
4720 | ||
7c65093a | 4721 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
4722 | * in a number of different ways. Note that to cater for unit |
4723 | * types such as slice, we are generally fine with units that | |
e9e8cbc8 ZJS |
4724 | * are marked UNIT_LOADED even though nothing was actually |
4725 | * loaded, as those unit types don't require a file on disk. */ | |
0f13f3bd LP |
4726 | |
4727 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
4728 | u->fragment_path || | |
4729 | u->source_path || | |
4730 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
4731 | u->job || |
4732 | u->merged_into); | |
4733 | } | |
291d565a LP |
4734 | |
4735 | pid_t unit_control_pid(Unit *u) { | |
4736 | assert(u); | |
4737 | ||
4738 | if (UNIT_VTABLE(u)->control_pid) | |
4739 | return UNIT_VTABLE(u)->control_pid(u); | |
4740 | ||
4741 | return 0; | |
4742 | } | |
4743 | ||
4744 | pid_t unit_main_pid(Unit *u) { | |
4745 | assert(u); | |
4746 | ||
4747 | if (UNIT_VTABLE(u)->main_pid) | |
4748 | return UNIT_VTABLE(u)->main_pid(u); | |
4749 | ||
4750 | return 0; | |
4751 | } | |
00d9ef85 LP |
4752 | |
4753 | static void unit_unref_uid_internal( | |
4754 | Unit *u, | |
4755 | uid_t *ref_uid, | |
4756 | bool destroy_now, | |
4757 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
4758 | ||
4759 | assert(u); | |
4760 | assert(ref_uid); | |
4761 | assert(_manager_unref_uid); | |
4762 | ||
4763 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
4764 | * gid_t are actually the same time, with the same validity rules. | |
4765 | * | |
4766 | * Drops a reference to UID/GID from a unit. */ | |
4767 | ||
4768 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4769 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4770 | ||
4771 | if (!uid_is_valid(*ref_uid)) | |
4772 | return; | |
4773 | ||
4774 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
4775 | *ref_uid = UID_INVALID; | |
4776 | } | |
4777 | ||
4778 | void unit_unref_uid(Unit *u, bool destroy_now) { | |
4779 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); | |
4780 | } | |
4781 | ||
4782 | void unit_unref_gid(Unit *u, bool destroy_now) { | |
4783 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); | |
4784 | } | |
4785 | ||
4786 | static int unit_ref_uid_internal( | |
4787 | Unit *u, | |
4788 | uid_t *ref_uid, | |
4789 | uid_t uid, | |
4790 | bool clean_ipc, | |
4791 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
4792 | ||
4793 | int r; | |
4794 | ||
4795 | assert(u); | |
4796 | assert(ref_uid); | |
4797 | assert(uid_is_valid(uid)); | |
4798 | assert(_manager_ref_uid); | |
4799 | ||
4800 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
4801 | * are actually the same type, and have the same validity rules. | |
4802 | * | |
4803 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
4804 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
4805 | * drops to zero. */ | |
4806 | ||
4807 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4808 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4809 | ||
4810 | if (*ref_uid == uid) | |
4811 | return 0; | |
4812 | ||
4813 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
4814 | return -EBUSY; | |
4815 | ||
4816 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
4817 | if (r < 0) | |
4818 | return r; | |
4819 | ||
4820 | *ref_uid = uid; | |
4821 | return 1; | |
4822 | } | |
4823 | ||
4824 | int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { | |
4825 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); | |
4826 | } | |
4827 | ||
4828 | int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { | |
4829 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); | |
4830 | } | |
4831 | ||
4832 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
4833 | int r = 0, q = 0; | |
4834 | ||
4835 | assert(u); | |
4836 | ||
4837 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
4838 | ||
4839 | if (uid_is_valid(uid)) { | |
4840 | r = unit_ref_uid(u, uid, clean_ipc); | |
4841 | if (r < 0) | |
4842 | return r; | |
4843 | } | |
4844 | ||
4845 | if (gid_is_valid(gid)) { | |
4846 | q = unit_ref_gid(u, gid, clean_ipc); | |
4847 | if (q < 0) { | |
4848 | if (r > 0) | |
4849 | unit_unref_uid(u, false); | |
4850 | ||
4851 | return q; | |
4852 | } | |
4853 | } | |
4854 | ||
4855 | return r > 0 || q > 0; | |
4856 | } | |
4857 | ||
4858 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
4859 | ExecContext *c; | |
4860 | int r; | |
4861 | ||
4862 | assert(u); | |
4863 | ||
4864 | c = unit_get_exec_context(u); | |
4865 | ||
4866 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
4867 | if (r < 0) | |
4868 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
4869 | ||
4870 | return r; | |
4871 | } | |
4872 | ||
4873 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { | |
4874 | assert(u); | |
4875 | ||
4876 | unit_unref_uid(u, destroy_now); | |
4877 | unit_unref_gid(u, destroy_now); | |
4878 | } | |
4879 | ||
4880 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { | |
4881 | int r; | |
4882 | ||
4883 | assert(u); | |
4884 | ||
4885 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
4886 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
4887 | * objects when no service references the UID/GID anymore. */ | |
4888 | ||
4889 | r = unit_ref_uid_gid(u, uid, gid); | |
4890 | if (r > 0) | |
4891 | bus_unit_send_change_signal(u); | |
4892 | } | |
4b58153d LP |
4893 | |
4894 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { | |
4895 | int r; | |
4896 | ||
4897 | assert(u); | |
4898 | ||
4899 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
4900 | ||
4901 | if (sd_id128_equal(u->invocation_id, id)) | |
4902 | return 0; | |
4903 | ||
4904 | if (!sd_id128_is_null(u->invocation_id)) | |
4905 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
4906 | ||
4907 | if (sd_id128_is_null(id)) { | |
4908 | r = 0; | |
4909 | goto reset; | |
4910 | } | |
4911 | ||
4912 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
4913 | if (r < 0) | |
4914 | goto reset; | |
4915 | ||
4916 | u->invocation_id = id; | |
4917 | sd_id128_to_string(id, u->invocation_id_string); | |
4918 | ||
4919 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
4920 | if (r < 0) | |
4921 | goto reset; | |
4922 | ||
4923 | return 0; | |
4924 | ||
4925 | reset: | |
4926 | u->invocation_id = SD_ID128_NULL; | |
4927 | u->invocation_id_string[0] = 0; | |
4928 | return r; | |
4929 | } | |
4930 | ||
4931 | int unit_acquire_invocation_id(Unit *u) { | |
4932 | sd_id128_t id; | |
4933 | int r; | |
4934 | ||
4935 | assert(u); | |
4936 | ||
4937 | r = sd_id128_randomize(&id); | |
4938 | if (r < 0) | |
4939 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
4940 | ||
4941 | r = unit_set_invocation_id(u, id); | |
4942 | if (r < 0) | |
4943 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
4944 | ||
4945 | return 0; | |
4946 | } | |
f0d47797 | 4947 | |
7960b0c7 LP |
4948 | void unit_set_exec_params(Unit *u, ExecParameters *p) { |
4949 | assert(u); | |
4950 | assert(p); | |
f0d47797 | 4951 | |
004c7f16 LP |
4952 | /* Copy parameters from manager */ |
4953 | p->environment = u->manager->environment; | |
4954 | p->confirm_spawn = manager_get_confirm_spawn(u->manager); | |
4955 | p->cgroup_supported = u->manager->cgroup_supported; | |
4956 | p->prefix = u->manager->prefix; | |
4957 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
4958 | ||
4959 | /* Copy paramaters from unit */ | |
7960b0c7 | 4960 | p->cgroup_path = u->cgroup_path; |
1d9cc876 | 4961 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
f0d47797 | 4962 | } |
a79279c7 | 4963 | |
4c253ed1 | 4964 | int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) { |
a79279c7 LP |
4965 | int r; |
4966 | ||
4967 | assert(u); | |
4968 | assert(ret); | |
4969 | ||
4970 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
4971 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
4972 | ||
4973 | (void) unit_realize_cgroup(u); | |
4974 | ||
4c253ed1 LP |
4975 | r = safe_fork(name, FORK_REOPEN_LOG, ret); |
4976 | if (r != 0) | |
4977 | return r; | |
a79279c7 | 4978 | |
4c253ed1 LP |
4979 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); |
4980 | (void) ignore_signals(SIGPIPE, -1); | |
a79279c7 | 4981 | |
4c253ed1 | 4982 | (void) prctl(PR_SET_PDEATHSIG, SIGTERM); |
a79279c7 | 4983 | |
4c253ed1 LP |
4984 | if (u->cgroup_path) { |
4985 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
4986 | if (r < 0) { | |
4987 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", u->cgroup_path); | |
4988 | _exit(EXIT_CGROUP); | |
a79279c7 | 4989 | } |
a79279c7 LP |
4990 | } |
4991 | ||
4c253ed1 | 4992 | return 0; |
a79279c7 | 4993 | } |
c999cf38 LP |
4994 | |
4995 | static void unit_update_dependency_mask(Unit *u, UnitDependency d, Unit *other, UnitDependencyInfo di) { | |
4996 | assert(u); | |
4997 | assert(d >= 0); | |
4998 | assert(d < _UNIT_DEPENDENCY_MAX); | |
4999 | assert(other); | |
5000 | ||
5001 | if (di.origin_mask == 0 && di.destination_mask == 0) { | |
5002 | /* No bit set anymore, let's drop the whole entry */ | |
5003 | assert_se(hashmap_remove(u->dependencies[d], other)); | |
5004 | log_unit_debug(u, "%s lost dependency %s=%s", u->id, unit_dependency_to_string(d), other->id); | |
5005 | } else | |
5006 | /* Mask was reduced, let's update the entry */ | |
5007 | assert_se(hashmap_update(u->dependencies[d], other, di.data) == 0); | |
5008 | } | |
5009 | ||
5010 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
5011 | UnitDependency d; | |
5012 | ||
5013 | assert(u); | |
5014 | ||
5015 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5016 | ||
5017 | if (mask == 0) | |
5018 | return; | |
5019 | ||
5020 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
5021 | bool done; | |
5022 | ||
5023 | do { | |
5024 | UnitDependencyInfo di; | |
5025 | Unit *other; | |
5026 | Iterator i; | |
5027 | ||
5028 | done = true; | |
5029 | ||
5030 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { | |
5031 | UnitDependency q; | |
5032 | ||
5033 | if ((di.origin_mask & ~mask) == di.origin_mask) | |
5034 | continue; | |
5035 | di.origin_mask &= ~mask; | |
5036 | unit_update_dependency_mask(u, d, other, di); | |
5037 | ||
5038 | /* We updated the dependency from our unit to the other unit now. But most dependencies | |
5039 | * imply a reverse dependency. Hence, let's delete that one too. For that we go through | |
5040 | * all dependency types on the other unit and delete all those which point to us and | |
5041 | * have the right mask set. */ | |
5042 | ||
5043 | for (q = 0; q < _UNIT_DEPENDENCY_MAX; q++) { | |
5044 | UnitDependencyInfo dj; | |
5045 | ||
5046 | dj.data = hashmap_get(other->dependencies[q], u); | |
5047 | if ((dj.destination_mask & ~mask) == dj.destination_mask) | |
5048 | continue; | |
5049 | dj.destination_mask &= ~mask; | |
5050 | ||
5051 | unit_update_dependency_mask(other, q, u, dj); | |
5052 | } | |
5053 | ||
5054 | unit_add_to_gc_queue(other); | |
5055 | ||
5056 | done = false; | |
5057 | break; | |
5058 | } | |
5059 | ||
5060 | } while (!done); | |
5061 | } | |
5062 | } | |
d3070fbd LP |
5063 | |
5064 | static int unit_export_invocation_id(Unit *u) { | |
5065 | const char *p; | |
5066 | int r; | |
5067 | ||
5068 | assert(u); | |
5069 | ||
5070 | if (u->exported_invocation_id) | |
5071 | return 0; | |
5072 | ||
5073 | if (sd_id128_is_null(u->invocation_id)) | |
5074 | return 0; | |
5075 | ||
5076 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
5077 | r = symlink_atomic(u->invocation_id_string, p); | |
5078 | if (r < 0) | |
5079 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5080 | ||
5081 | u->exported_invocation_id = true; | |
5082 | return 0; | |
5083 | } | |
5084 | ||
5085 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5086 | const char *p; | |
5087 | char buf[2]; | |
5088 | int r; | |
5089 | ||
5090 | assert(u); | |
5091 | assert(c); | |
5092 | ||
5093 | if (u->exported_log_level_max) | |
5094 | return 0; | |
5095 | ||
5096 | if (c->log_level_max < 0) | |
5097 | return 0; | |
5098 | ||
5099 | assert(c->log_level_max <= 7); | |
5100 | ||
5101 | buf[0] = '0' + c->log_level_max; | |
5102 | buf[1] = 0; | |
5103 | ||
5104 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5105 | r = symlink_atomic(buf, p); | |
5106 | if (r < 0) | |
5107 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5108 | ||
5109 | u->exported_log_level_max = true; | |
5110 | return 0; | |
5111 | } | |
5112 | ||
5113 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5114 | _cleanup_close_ int fd = -1; | |
5115 | struct iovec *iovec; | |
5116 | const char *p; | |
5117 | char *pattern; | |
5118 | le64_t *sizes; | |
5119 | ssize_t n; | |
5120 | size_t i; | |
5121 | int r; | |
5122 | ||
5123 | if (u->exported_log_extra_fields) | |
5124 | return 0; | |
5125 | ||
5126 | if (c->n_log_extra_fields <= 0) | |
5127 | return 0; | |
5128 | ||
5129 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5130 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5131 | ||
5132 | for (i = 0; i < c->n_log_extra_fields; i++) { | |
5133 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); | |
5134 | ||
5135 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5136 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5137 | } | |
5138 | ||
5139 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5140 | pattern = strjoina(p, ".XXXXXX"); | |
5141 | ||
5142 | fd = mkostemp_safe(pattern); | |
5143 | if (fd < 0) | |
5144 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5145 | ||
5146 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5147 | if (n < 0) { | |
5148 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5149 | goto fail; | |
5150 | } | |
5151 | ||
5152 | (void) fchmod(fd, 0644); | |
5153 | ||
5154 | if (rename(pattern, p) < 0) { | |
5155 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5156 | goto fail; | |
5157 | } | |
5158 | ||
5159 | u->exported_log_extra_fields = true; | |
5160 | return 0; | |
5161 | ||
5162 | fail: | |
5163 | (void) unlink(pattern); | |
5164 | return r; | |
5165 | } | |
5166 | ||
5167 | void unit_export_state_files(Unit *u) { | |
5168 | const ExecContext *c; | |
5169 | ||
5170 | assert(u); | |
5171 | ||
5172 | if (!u->id) | |
5173 | return; | |
5174 | ||
5175 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5176 | return; | |
5177 | ||
8f632531 LP |
5178 | if (u->manager->test_run_flags != 0) |
5179 | return; | |
5180 | ||
d3070fbd LP |
5181 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5182 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5183 | * the IPC system itself and PID 1 also log to the journal. | |
5184 | * | |
5185 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5186 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5187 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5188 | * namespace at least. | |
5189 | * | |
5190 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5191 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5192 | * them with one. */ | |
5193 | ||
5194 | (void) unit_export_invocation_id(u); | |
5195 | ||
5196 | c = unit_get_exec_context(u); | |
5197 | if (c) { | |
5198 | (void) unit_export_log_level_max(u, c); | |
5199 | (void) unit_export_log_extra_fields(u, c); | |
5200 | } | |
5201 | } | |
5202 | ||
5203 | void unit_unlink_state_files(Unit *u) { | |
5204 | const char *p; | |
5205 | ||
5206 | assert(u); | |
5207 | ||
5208 | if (!u->id) | |
5209 | return; | |
5210 | ||
5211 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5212 | return; | |
5213 | ||
5214 | /* Undoes the effect of unit_export_state() */ | |
5215 | ||
5216 | if (u->exported_invocation_id) { | |
5217 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
5218 | (void) unlink(p); | |
5219 | ||
5220 | u->exported_invocation_id = false; | |
5221 | } | |
5222 | ||
5223 | if (u->exported_log_level_max) { | |
5224 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5225 | (void) unlink(p); | |
5226 | ||
5227 | u->exported_log_level_max = false; | |
5228 | } | |
5229 | ||
5230 | if (u->exported_log_extra_fields) { | |
5231 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5232 | (void) unlink(p); | |
5233 | ||
5234 | u->exported_log_extra_fields = false; | |
5235 | } | |
5236 | } | |
5afe510c | 5237 | |
3c7416b6 LP |
5238 | int unit_prepare_exec(Unit *u) { |
5239 | int r; | |
5240 | ||
5241 | assert(u); | |
5242 | ||
5243 | /* Prepares everything so that we can fork of a process for this unit */ | |
5244 | ||
5245 | (void) unit_realize_cgroup(u); | |
5246 | ||
5247 | if (u->reset_accounting) { | |
5248 | (void) unit_reset_cpu_accounting(u); | |
5249 | (void) unit_reset_ip_accounting(u); | |
5250 | u->reset_accounting = false; | |
5251 | } | |
5252 | ||
5253 | unit_export_state_files(u); | |
5254 | ||
5255 | r = unit_setup_exec_runtime(u); | |
5256 | if (r < 0) | |
5257 | return r; | |
5258 | ||
5259 | r = unit_setup_dynamic_creds(u); | |
5260 | if (r < 0) | |
5261 | return r; | |
5262 | ||
5263 | return 0; | |
5264 | } | |
5265 | ||
a4634b21 LP |
5266 | static void log_leftover(pid_t pid, int sig, void *userdata) { |
5267 | _cleanup_free_ char *comm = NULL; | |
5268 | ||
5269 | (void) get_process_comm(pid, &comm); | |
5270 | ||
5271 | if (comm && comm[0] == '(') /* Most likely our own helper process (PAM?), ignore */ | |
5272 | return; | |
5273 | ||
5274 | log_unit_warning(userdata, | |
5275 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5276 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5277 | pid, strna(comm)); | |
5278 | } | |
5279 | ||
5280 | void unit_warn_leftover_processes(Unit *u) { | |
5281 | assert(u); | |
5282 | ||
5283 | (void) unit_pick_cgroup_path(u); | |
5284 | ||
5285 | if (!u->cgroup_path) | |
5286 | return; | |
5287 | ||
5288 | (void) cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_leftover, u); | |
5289 | } | |
5290 | ||
bb2c7685 LP |
5291 | bool unit_needs_console(Unit *u) { |
5292 | ExecContext *ec; | |
5293 | UnitActiveState state; | |
5294 | ||
5295 | assert(u); | |
5296 | ||
5297 | state = unit_active_state(u); | |
5298 | ||
5299 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5300 | return false; | |
5301 | ||
5302 | if (UNIT_VTABLE(u)->needs_console) | |
5303 | return UNIT_VTABLE(u)->needs_console(u); | |
5304 | ||
5305 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5306 | ec = unit_get_exec_context(u); | |
5307 | if (!ec) | |
5308 | return false; | |
5309 | ||
5310 | return exec_context_may_touch_console(ec); | |
5311 | } | |
5312 | ||
81e9871e LP |
5313 | const char *unit_label_path(Unit *u) { |
5314 | const char *p; | |
5315 | ||
5316 | /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off | |
5317 | * when validating access checks. */ | |
5318 | ||
5319 | p = u->source_path ?: u->fragment_path; | |
5320 | if (!p) | |
5321 | return NULL; | |
5322 | ||
5323 | /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */ | |
5324 | if (path_equal(p, "/dev/null")) | |
5325 | return NULL; | |
5326 | ||
5327 | return p; | |
5328 | } | |
5329 | ||
6592b975 LP |
5330 | int unit_pid_attachable(Unit *u, pid_t pid, sd_bus_error *error) { |
5331 | int r; | |
5332 | ||
5333 | assert(u); | |
5334 | ||
5335 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5336 | * and not a kernel thread either */ | |
5337 | ||
5338 | /* First, a simple range check */ | |
5339 | if (!pid_is_valid(pid)) | |
5340 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier " PID_FMT " is not valid.", pid); | |
5341 | ||
5342 | /* Some extra safety check */ | |
5343 | if (pid == 1 || pid == getpid_cached()) | |
5344 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager processs, refusing.", pid); | |
5345 | ||
5346 | /* Don't even begin to bother with kernel threads */ | |
5347 | r = is_kernel_thread(pid); | |
5348 | if (r == -ESRCH) | |
5349 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid); | |
5350 | if (r < 0) | |
5351 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid); | |
5352 | if (r > 0) | |
5353 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid); | |
5354 | ||
5355 | return 0; | |
5356 | } | |
5357 | ||
5afe510c LP |
5358 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
5359 | [COLLECT_INACTIVE] = "inactive", | |
5360 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
5361 | }; | |
5362 | ||
5363 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); |