]>
Commit | Line | Data |
---|---|---|
53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a7334b09 | 2 | |
87f0e418 | 3 | #include <errno.h> |
0301abf4 | 4 | #include <stdlib.h> |
4f5dd394 | 5 | #include <string.h> |
4c253ed1 | 6 | #include <sys/prctl.h> |
45fb0699 | 7 | #include <sys/stat.h> |
4f5dd394 | 8 | #include <unistd.h> |
87f0e418 | 9 | |
718db961 LP |
10 | #include "sd-id128.h" |
11 | #include "sd-messages.h" | |
4f5dd394 | 12 | |
57b7a260 | 13 | #include "all-units.h" |
d68c645b | 14 | #include "alloc-util.h" |
4f5dd394 LP |
15 | #include "bus-common-errors.h" |
16 | #include "bus-util.h" | |
c6c18be3 | 17 | #include "cgroup-util.h" |
4f5dd394 LP |
18 | #include "dbus-unit.h" |
19 | #include "dbus.h" | |
20 | #include "dropin.h" | |
21 | #include "escape.h" | |
22 | #include "execute.h" | |
6a48d82f | 23 | #include "fd-util.h" |
a5c32cff | 24 | #include "fileio-label.h" |
ee228be1 | 25 | #include "fileio.h" |
f97b34a6 | 26 | #include "format-util.h" |
d3070fbd | 27 | #include "fs-util.h" |
4b58153d | 28 | #include "id128-util.h" |
915b1d01 | 29 | #include "io-util.h" |
4f5dd394 LP |
30 | #include "load-dropin.h" |
31 | #include "load-fragment.h" | |
32 | #include "log.h" | |
33 | #include "macro.h" | |
34 | #include "missing.h" | |
35 | #include "mkdir.h" | |
6bedfcbb | 36 | #include "parse-util.h" |
4f5dd394 | 37 | #include "path-util.h" |
0b452006 | 38 | #include "process-util.h" |
d68c645b | 39 | #include "serialize.h" |
4f5dd394 | 40 | #include "set.h" |
6eb7c172 | 41 | #include "signal-util.h" |
d3070fbd | 42 | #include "sparse-endian.h" |
e9db43d5 | 43 | #include "special.h" |
2e59b241 | 44 | #include "specifier.h" |
8fcde012 | 45 | #include "stat-util.h" |
d054f0a4 | 46 | #include "stdio-util.h" |
5afe510c | 47 | #include "string-table.h" |
07630cea | 48 | #include "string-util.h" |
4f5dd394 | 49 | #include "strv.h" |
5b262f74 | 50 | #include "terminal-util.h" |
e4de7287 | 51 | #include "tmpfile-util.h" |
4f4afc88 | 52 | #include "umask-util.h" |
4f5dd394 | 53 | #include "unit-name.h" |
e9db43d5 | 54 | #include "unit.h" |
b1d4f8e1 LP |
55 | #include "user-util.h" |
56 | #include "virt.h" | |
87f0e418 LP |
57 | |
58 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
59 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 LP |
60 | [UNIT_SOCKET] = &socket_vtable, |
61 | [UNIT_TARGET] = &target_vtable, | |
62 | [UNIT_DEVICE] = &device_vtable, | |
63 | [UNIT_MOUNT] = &mount_vtable, | |
64 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 65 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 66 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 67 | [UNIT_PATH] = &path_vtable, |
6c12b52e | 68 | [UNIT_SLICE] = &slice_vtable, |
5afe510c | 69 | [UNIT_SCOPE] = &scope_vtable, |
87f0e418 LP |
70 | }; |
71 | ||
f2341e0a | 72 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 73 | |
7d17cfbc | 74 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
75 | Unit *u; |
76 | ||
77 | assert(m); | |
ac155bb8 | 78 | assert(size >= sizeof(Unit)); |
87f0e418 | 79 | |
7d17cfbc MS |
80 | u = malloc0(size); |
81 | if (!u) | |
87f0e418 LP |
82 | return NULL; |
83 | ||
d5099efc | 84 | u->names = set_new(&string_hash_ops); |
6b430fdb ZJS |
85 | if (!u->names) |
86 | return mfree(u); | |
87f0e418 | 87 | |
ac155bb8 MS |
88 | u->manager = m; |
89 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
90 | u->default_dependencies = true; |
91 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 92 | u->unit_file_preset = -1; |
d420282b | 93 | u->on_failure_job_mode = JOB_REPLACE; |
efdb0237 | 94 | u->cgroup_inotify_wd = -1; |
36c16a7c | 95 | u->job_timeout = USEC_INFINITY; |
a2df3ea4 | 96 | u->job_running_timeout = USEC_INFINITY; |
00d9ef85 LP |
97 | u->ref_uid = UID_INVALID; |
98 | u->ref_gid = GID_INVALID; | |
fe700f46 | 99 | u->cpu_usage_last = NSEC_INFINITY; |
17f14955 | 100 | u->cgroup_invalidated_mask |= CGROUP_MASK_BPF_FIREWALL; |
7af67e9a | 101 | u->failure_action_exit_status = u->success_action_exit_status = -1; |
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 | ||
303ee601 | 135 | bool unit_has_name(const Unit *u, const char *name) { |
f278026d LP |
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 | ||
fda09318 | 446 | void unit_submit_to_stop_when_unneeded_queue(Unit *u) { |
a3c1168a LP |
447 | assert(u); |
448 | ||
449 | if (u->in_stop_when_unneeded_queue) | |
450 | return; | |
451 | ||
452 | if (!u->stop_when_unneeded) | |
453 | return; | |
454 | ||
455 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
456 | return; | |
457 | ||
458 | LIST_PREPEND(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
459 | u->in_stop_when_unneeded_queue = true; | |
460 | } | |
461 | ||
eef85c4a | 462 | static void bidi_set_free(Unit *u, Hashmap *h) { |
87f0e418 | 463 | Unit *other; |
eef85c4a LP |
464 | Iterator i; |
465 | void *v; | |
87f0e418 LP |
466 | |
467 | assert(u); | |
468 | ||
eef85c4a | 469 | /* Frees the hashmap and makes sure we are dropped from the inverse pointers */ |
87f0e418 | 470 | |
eef85c4a | 471 | HASHMAP_FOREACH_KEY(v, other, h, i) { |
87f0e418 LP |
472 | UnitDependency d; |
473 | ||
474 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
eef85c4a | 475 | hashmap_remove(other->dependencies[d], u); |
701cc384 LP |
476 | |
477 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
478 | } |
479 | ||
eef85c4a | 480 | hashmap_free(h); |
87f0e418 LP |
481 | } |
482 | ||
c2756a68 LP |
483 | static void unit_remove_transient(Unit *u) { |
484 | char **i; | |
485 | ||
486 | assert(u); | |
487 | ||
488 | if (!u->transient) | |
489 | return; | |
490 | ||
491 | if (u->fragment_path) | |
3f5e8115 | 492 | (void) unlink(u->fragment_path); |
c2756a68 LP |
493 | |
494 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 495 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 496 | |
39591351 LP |
497 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
498 | if (!p) | |
499 | continue; | |
500 | ||
501 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
502 | if (!pp) | |
503 | continue; | |
504 | ||
505 | /* Only drop transient drop-ins */ | |
506 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
507 | continue; | |
c2756a68 | 508 | |
39591351 LP |
509 | (void) unlink(*i); |
510 | (void) rmdir(p); | |
c2756a68 LP |
511 | } |
512 | } | |
513 | ||
a57f7e2c | 514 | static void unit_free_requires_mounts_for(Unit *u) { |
eef85c4a | 515 | assert(u); |
a57f7e2c | 516 | |
eef85c4a LP |
517 | for (;;) { |
518 | _cleanup_free_ char *path; | |
a57f7e2c | 519 | |
eef85c4a LP |
520 | path = hashmap_steal_first_key(u->requires_mounts_for); |
521 | if (!path) | |
522 | break; | |
523 | else { | |
524 | char s[strlen(path) + 1]; | |
a57f7e2c | 525 | |
eef85c4a LP |
526 | PATH_FOREACH_PREFIX_MORE(s, path) { |
527 | char *y; | |
528 | Set *x; | |
529 | ||
530 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
531 | if (!x) | |
532 | continue; | |
a57f7e2c | 533 | |
eef85c4a | 534 | (void) set_remove(x, u); |
a57f7e2c | 535 | |
eef85c4a LP |
536 | if (set_isempty(x)) { |
537 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
538 | free(y); | |
539 | set_free(x); | |
540 | } | |
a57f7e2c LP |
541 | } |
542 | } | |
543 | } | |
544 | ||
eef85c4a | 545 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
a57f7e2c LP |
546 | } |
547 | ||
598459ce LP |
548 | static void unit_done(Unit *u) { |
549 | ExecContext *ec; | |
550 | CGroupContext *cc; | |
551 | ||
552 | assert(u); | |
553 | ||
554 | if (u->type < 0) | |
555 | return; | |
556 | ||
557 | if (UNIT_VTABLE(u)->done) | |
558 | UNIT_VTABLE(u)->done(u); | |
559 | ||
560 | ec = unit_get_exec_context(u); | |
561 | if (ec) | |
562 | exec_context_done(ec); | |
563 | ||
564 | cc = unit_get_cgroup_context(u); | |
565 | if (cc) | |
566 | cgroup_context_done(cc); | |
567 | } | |
568 | ||
87f0e418 LP |
569 | void unit_free(Unit *u) { |
570 | UnitDependency d; | |
571 | Iterator i; | |
572 | char *t; | |
573 | ||
c9d5c9c0 LP |
574 | if (!u) |
575 | return; | |
87f0e418 | 576 | |
b8b6f321 LP |
577 | if (UNIT_ISSET(u->slice)) { |
578 | /* A unit is being dropped from the tree, make sure our parent slice recalculates the member mask */ | |
579 | unit_invalidate_cgroup_members_masks(UNIT_DEREF(u->slice)); | |
580 | ||
581 | /* And make sure the parent is realized again, updating cgroup memberships */ | |
582 | unit_add_to_cgroup_realize_queue(UNIT_DEREF(u->slice)); | |
583 | } | |
584 | ||
50fb00b7 | 585 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 586 | |
2c289ea8 | 587 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
588 | unit_remove_transient(u); |
589 | ||
c1e1601e LP |
590 | bus_unit_send_removed_signal(u); |
591 | ||
598459ce | 592 | unit_done(u); |
a013b84b | 593 | |
50be4f4a | 594 | unit_dequeue_rewatch_pids(u); |
cf9fd508 | 595 | |
50be4f4a | 596 | sd_bus_slot_unref(u->match_bus_slot); |
05a98afd LP |
597 | sd_bus_track_unref(u->bus_track); |
598 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
599 | ||
a57f7e2c LP |
600 | unit_free_requires_mounts_for(u); |
601 | ||
ac155bb8 MS |
602 | SET_FOREACH(t, u->names, i) |
603 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 604 | |
4b58153d LP |
605 | if (!sd_id128_is_null(u->invocation_id)) |
606 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
607 | ||
97e7d748 MS |
608 | if (u->job) { |
609 | Job *j = u->job; | |
610 | job_uninstall(j); | |
611 | job_free(j); | |
612 | } | |
964e0949 | 613 | |
e0209d83 MS |
614 | if (u->nop_job) { |
615 | Job *j = u->nop_job; | |
616 | job_uninstall(j); | |
617 | job_free(j); | |
618 | } | |
619 | ||
964e0949 | 620 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 621 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 622 | |
adefcf28 LP |
623 | if (u->on_console) |
624 | manager_unref_console(u->manager); | |
625 | ||
efdb0237 | 626 | unit_release_cgroup(u); |
72673e86 | 627 | |
d3070fbd LP |
628 | if (!MANAGER_IS_RELOADING(u->manager)) |
629 | unit_unlink_state_files(u); | |
630 | ||
00d9ef85 LP |
631 | unit_unref_uid_gid(u, false); |
632 | ||
5269eb6b | 633 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 634 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 635 | |
a911bb9a LP |
636 | unit_unwatch_all_pids(u); |
637 | ||
702a2d8f | 638 | unit_ref_unset(&u->slice); |
7f7d01ed ZJS |
639 | while (u->refs_by_target) |
640 | unit_ref_unset(u->refs_by_target); | |
57020a3a | 641 | |
ac155bb8 | 642 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 643 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 644 | |
ac155bb8 | 645 | if (u->in_load_queue) |
71fda00f | 646 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 647 | |
ac155bb8 | 648 | if (u->in_dbus_queue) |
71fda00f | 649 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 650 | |
a2d72e26 | 651 | if (u->in_gc_queue) |
c5a97ed1 | 652 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 653 | |
91a6073e LP |
654 | if (u->in_cgroup_realize_queue) |
655 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 656 | |
09e24654 LP |
657 | if (u->in_cgroup_empty_queue) |
658 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
659 | ||
1bdf2790 ZJS |
660 | if (u->in_cleanup_queue) |
661 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
adefcf28 | 662 | |
19496554 MS |
663 | if (u->in_target_deps_queue) |
664 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
665 | ||
a3c1168a LP |
666 | if (u->in_stop_when_unneeded_queue) |
667 | LIST_REMOVE(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
668 | ||
6a48d82f DM |
669 | safe_close(u->ip_accounting_ingress_map_fd); |
670 | safe_close(u->ip_accounting_egress_map_fd); | |
72673e86 | 671 | |
6a48d82f DM |
672 | safe_close(u->ipv4_allow_map_fd); |
673 | safe_close(u->ipv6_allow_map_fd); | |
674 | safe_close(u->ipv4_deny_map_fd); | |
675 | safe_close(u->ipv6_deny_map_fd); | |
d3070fbd | 676 | |
6a48d82f | 677 | bpf_program_unref(u->ip_bpf_ingress); |
aa2b6f1d | 678 | bpf_program_unref(u->ip_bpf_ingress_installed); |
6a48d82f | 679 | bpf_program_unref(u->ip_bpf_egress); |
aa2b6f1d | 680 | bpf_program_unref(u->ip_bpf_egress_installed); |
00d9ef85 | 681 | |
084c7007 RG |
682 | bpf_program_unref(u->bpf_device_control_installed); |
683 | ||
a946fa9b ZJS |
684 | condition_free_list(u->conditions); |
685 | condition_free_list(u->asserts); | |
f755e3b7 | 686 | |
ac155bb8 | 687 | free(u->description); |
49dbfa7b | 688 | strv_free(u->documentation); |
ac155bb8 | 689 | free(u->fragment_path); |
1b64d026 | 690 | free(u->source_path); |
ae7a7182 | 691 | strv_free(u->dropin_paths); |
ac155bb8 | 692 | free(u->instance); |
87f0e418 | 693 | |
f189ab18 LP |
694 | free(u->job_timeout_reboot_arg); |
695 | ||
ac155bb8 | 696 | set_free_free(u->names); |
87f0e418 | 697 | |
6bf0f408 LP |
698 | free(u->reboot_arg); |
699 | ||
87f0e418 LP |
700 | free(u); |
701 | } | |
702 | ||
703 | UnitActiveState unit_active_state(Unit *u) { | |
704 | assert(u); | |
705 | ||
ac155bb8 | 706 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
707 | return unit_active_state(unit_follow_merge(u)); |
708 | ||
709 | /* After a reload it might happen that a unit is not correctly | |
710 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 711 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
712 | |
713 | return UNIT_VTABLE(u)->active_state(u); | |
714 | } | |
715 | ||
10a94420 LP |
716 | const char* unit_sub_state_to_string(Unit *u) { |
717 | assert(u); | |
718 | ||
719 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
720 | } | |
721 | ||
eef85c4a LP |
722 | static int set_complete_move(Set **s, Set **other) { |
723 | assert(s); | |
724 | assert(other); | |
725 | ||
726 | if (!other) | |
727 | return 0; | |
728 | ||
729 | if (*s) | |
730 | return set_move(*s, *other); | |
ae2a15bc LP |
731 | else |
732 | *s = TAKE_PTR(*other); | |
7c0b05e5 | 733 | |
eef85c4a LP |
734 | return 0; |
735 | } | |
736 | ||
737 | static int hashmap_complete_move(Hashmap **s, Hashmap **other) { | |
23a177ef LP |
738 | assert(s); |
739 | assert(other); | |
87f0e418 | 740 | |
23a177ef | 741 | if (!*other) |
7c0b05e5 | 742 | return 0; |
87f0e418 | 743 | |
eef85c4a LP |
744 | if (*s) |
745 | return hashmap_move(*s, *other); | |
ae2a15bc LP |
746 | else |
747 | *s = TAKE_PTR(*other); | |
7c0b05e5 MS |
748 | |
749 | return 0; | |
23a177ef | 750 | } |
87f0e418 | 751 | |
7c0b05e5 | 752 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
753 | char *t; |
754 | Iterator i; | |
7c0b05e5 | 755 | int r; |
87f0e418 | 756 | |
23a177ef LP |
757 | assert(u); |
758 | assert(other); | |
759 | ||
eef85c4a | 760 | r = set_complete_move(&u->names, &other->names); |
7c0b05e5 MS |
761 | if (r < 0) |
762 | return r; | |
23a177ef | 763 | |
ac155bb8 MS |
764 | set_free_free(other->names); |
765 | other->names = NULL; | |
766 | other->id = NULL; | |
23a177ef | 767 | |
ac155bb8 MS |
768 | SET_FOREACH(t, u->names, i) |
769 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
770 | |
771 | return 0; | |
87f0e418 LP |
772 | } |
773 | ||
09a65f92 MS |
774 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
775 | unsigned n_reserve; | |
776 | ||
777 | assert(u); | |
778 | assert(other); | |
779 | assert(d < _UNIT_DEPENDENCY_MAX); | |
780 | ||
781 | /* | |
782 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 783 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
784 | * as a whole to u by complete_move(). |
785 | */ | |
786 | if (!u->dependencies[d]) | |
787 | return 0; | |
788 | ||
789 | /* merge_dependencies() will skip a u-on-u dependency */ | |
eef85c4a | 790 | n_reserve = hashmap_size(other->dependencies[d]) - !!hashmap_get(other->dependencies[d], u); |
09a65f92 | 791 | |
eef85c4a | 792 | return hashmap_reserve(u->dependencies[d], n_reserve); |
09a65f92 MS |
793 | } |
794 | ||
d1fab3fe | 795 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
796 | Iterator i; |
797 | Unit *back; | |
eef85c4a | 798 | void *v; |
87f0e418 | 799 | int r; |
23a177ef | 800 | |
eef85c4a LP |
801 | /* Merges all dependencies of type 'd' of the unit 'other' into the deps of the unit 'u' */ |
802 | ||
23a177ef LP |
803 | assert(u); |
804 | assert(other); | |
805 | assert(d < _UNIT_DEPENDENCY_MAX); | |
806 | ||
eef85c4a LP |
807 | /* Fix backwards pointers. Let's iterate through all dependendent units of the other unit. */ |
808 | HASHMAP_FOREACH_KEY(v, back, other->dependencies[d], i) { | |
23a177ef LP |
809 | UnitDependency k; |
810 | ||
eef85c4a LP |
811 | /* Let's now iterate through the dependencies of that dependencies of the other units, looking for |
812 | * pointers back, and let's fix them up, to instead point to 'u'. */ | |
813 | ||
e48614c4 | 814 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff | 815 | if (back == u) { |
eef85c4a LP |
816 | /* Do not add dependencies between u and itself. */ |
817 | if (hashmap_remove(back->dependencies[k], other)) | |
f2341e0a | 818 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff | 819 | } else { |
eef85c4a LP |
820 | UnitDependencyInfo di_u, di_other, di_merged; |
821 | ||
822 | /* Let's drop this dependency between "back" and "other", and let's create it between | |
823 | * "back" and "u" instead. Let's merge the bit masks of the dependency we are moving, | |
824 | * and any such dependency which might already exist */ | |
825 | ||
826 | di_other.data = hashmap_get(back->dependencies[k], other); | |
827 | if (!di_other.data) | |
828 | continue; /* dependency isn't set, let's try the next one */ | |
829 | ||
830 | di_u.data = hashmap_get(back->dependencies[k], u); | |
831 | ||
832 | di_merged = (UnitDependencyInfo) { | |
833 | .origin_mask = di_u.origin_mask | di_other.origin_mask, | |
834 | .destination_mask = di_u.destination_mask | di_other.destination_mask, | |
835 | }; | |
836 | ||
837 | r = hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data); | |
838 | if (r < 0) | |
839 | log_warning_errno(r, "Failed to remove/replace: back=%s other=%s u=%s: %m", back->id, other_id, u->id); | |
840 | assert(r >= 0); | |
841 | ||
842 | /* assert_se(hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data) >= 0); */ | |
e66047ff | 843 | } |
e48614c4 | 844 | } |
eef85c4a | 845 | |
23a177ef LP |
846 | } |
847 | ||
e66047ff | 848 | /* Also do not move dependencies on u to itself */ |
eef85c4a | 849 | back = hashmap_remove(other->dependencies[d], u); |
d1fab3fe | 850 | if (back) |
f2341e0a | 851 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 852 | |
7c0b05e5 | 853 | /* The move cannot fail. The caller must have performed a reservation. */ |
eef85c4a | 854 | assert_se(hashmap_complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); |
23a177ef | 855 | |
eef85c4a | 856 | other->dependencies[d] = hashmap_free(other->dependencies[d]); |
23a177ef LP |
857 | } |
858 | ||
859 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 860 | UnitDependency d; |
d1fab3fe | 861 | const char *other_id = NULL; |
09a65f92 | 862 | int r; |
87f0e418 LP |
863 | |
864 | assert(u); | |
865 | assert(other); | |
ac155bb8 MS |
866 | assert(u->manager == other->manager); |
867 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 868 | |
cc916967 LP |
869 | other = unit_follow_merge(other); |
870 | ||
23a177ef LP |
871 | if (other == u) |
872 | return 0; | |
873 | ||
ac155bb8 | 874 | if (u->type != other->type) |
9e2f7c11 LP |
875 | return -EINVAL; |
876 | ||
ac155bb8 | 877 | if (!u->instance != !other->instance) |
87f0e418 LP |
878 | return -EINVAL; |
879 | ||
8a993b61 | 880 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
881 | return -EEXIST; |
882 | ||
ec2ce0c5 | 883 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 884 | return -EEXIST; |
87f0e418 | 885 | |
ac155bb8 | 886 | if (other->job) |
819e213f LP |
887 | return -EEXIST; |
888 | ||
e0209d83 MS |
889 | if (other->nop_job) |
890 | return -EEXIST; | |
891 | ||
fdf20a31 | 892 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
893 | return -EEXIST; |
894 | ||
d1fab3fe ZJS |
895 | if (other->id) |
896 | other_id = strdupa(other->id); | |
897 | ||
09a65f92 MS |
898 | /* Make reservations to ensure merge_dependencies() won't fail */ |
899 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
900 | r = reserve_dependencies(u, other, d); | |
901 | /* | |
902 | * We don't rollback reservations if we fail. We don't have | |
903 | * a way to undo reservations. A reservation is not a leak. | |
904 | */ | |
905 | if (r < 0) | |
906 | return r; | |
907 | } | |
908 | ||
87f0e418 | 909 | /* Merge names */ |
7c0b05e5 MS |
910 | r = merge_names(u, other); |
911 | if (r < 0) | |
912 | return r; | |
87f0e418 | 913 | |
57020a3a | 914 | /* Redirect all references */ |
7f7d01ed ZJS |
915 | while (other->refs_by_target) |
916 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
57020a3a | 917 | |
87f0e418 LP |
918 | /* Merge dependencies */ |
919 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 920 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 921 | |
ac155bb8 MS |
922 | other->load_state = UNIT_MERGED; |
923 | other->merged_into = u; | |
23a177ef | 924 | |
3616a49c LP |
925 | /* If there is still some data attached to the other node, we |
926 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 927 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
928 | if (UNIT_VTABLE(other)->done) |
929 | UNIT_VTABLE(other)->done(other); | |
930 | ||
931 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
932 | unit_add_to_cleanup_queue(other); |
933 | ||
934 | return 0; | |
935 | } | |
936 | ||
937 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 938 | _cleanup_free_ char *s = NULL; |
23a177ef | 939 | Unit *other; |
9e2f7c11 | 940 | int r; |
23a177ef LP |
941 | |
942 | assert(u); | |
943 | assert(name); | |
944 | ||
7410616c | 945 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 946 | if (!u->instance) |
9e2f7c11 LP |
947 | return -EINVAL; |
948 | ||
7410616c LP |
949 | r = unit_name_replace_instance(name, u->instance, &s); |
950 | if (r < 0) | |
951 | return r; | |
9e2f7c11 LP |
952 | |
953 | name = s; | |
954 | } | |
955 | ||
c2756a68 | 956 | other = manager_get_unit(u->manager, name); |
7410616c LP |
957 | if (other) |
958 | return unit_merge(u, other); | |
23a177ef | 959 | |
7410616c | 960 | return unit_add_name(u, name); |
23a177ef LP |
961 | } |
962 | ||
963 | Unit* unit_follow_merge(Unit *u) { | |
964 | assert(u); | |
965 | ||
ac155bb8 MS |
966 | while (u->load_state == UNIT_MERGED) |
967 | assert_se(u = u->merged_into); | |
23a177ef LP |
968 | |
969 | return u; | |
970 | } | |
971 | ||
972 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
ada5e276 YW |
973 | ExecDirectoryType dt; |
974 | char **dp; | |
23a177ef LP |
975 | int r; |
976 | ||
977 | assert(u); | |
978 | assert(c); | |
979 | ||
e1e74614 | 980 | if (c->working_directory && !c->working_directory_missing_ok) { |
eef85c4a | 981 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
982 | if (r < 0) |
983 | return r; | |
984 | } | |
985 | ||
986 | if (c->root_directory) { | |
eef85c4a | 987 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
988 | if (r < 0) |
989 | return r; | |
990 | } | |
991 | ||
915e6d16 | 992 | if (c->root_image) { |
eef85c4a | 993 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
994 | if (r < 0) |
995 | return r; | |
996 | } | |
997 | ||
72fd1768 | 998 | for (dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
999 | if (!u->manager->prefix[dt]) |
1000 | continue; | |
1001 | ||
1002 | STRV_FOREACH(dp, c->directories[dt].paths) { | |
1003 | _cleanup_free_ char *p; | |
1004 | ||
1005 | p = strjoin(u->manager->prefix[dt], "/", *dp); | |
1006 | if (!p) | |
1007 | return -ENOMEM; | |
1008 | ||
eef85c4a | 1009 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
1010 | if (r < 0) |
1011 | return r; | |
1012 | } | |
1013 | } | |
1014 | ||
463d0d15 | 1015 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
1016 | return 0; |
1017 | ||
1018 | if (c->private_tmp) { | |
d71f0505 LP |
1019 | const char *p; |
1020 | ||
1021 | FOREACH_STRING(p, "/tmp", "/var/tmp") { | |
eef85c4a | 1022 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
d71f0505 LP |
1023 | if (r < 0) |
1024 | return r; | |
1025 | } | |
b46a529c | 1026 | |
35d8c19a | 1027 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1028 | if (r < 0) |
1029 | return r; | |
1030 | } | |
1031 | ||
52c239d7 LB |
1032 | if (!IN_SET(c->std_output, |
1033 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1034 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1035 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE) && | |
1036 | !IN_SET(c->std_error, | |
1037 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1038 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1039 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE)) | |
23a177ef LP |
1040 | return 0; |
1041 | ||
1042 | /* If syslog or kernel logging is requested, make sure our own | |
1043 | * logging daemon is run first. */ | |
1044 | ||
35d8c19a | 1045 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1046 | if (r < 0) |
1047 | return r; | |
23a177ef | 1048 | |
87f0e418 LP |
1049 | return 0; |
1050 | } | |
1051 | ||
87f0e418 LP |
1052 | const char *unit_description(Unit *u) { |
1053 | assert(u); | |
1054 | ||
ac155bb8 MS |
1055 | if (u->description) |
1056 | return u->description; | |
87f0e418 | 1057 | |
ac155bb8 | 1058 | return strna(u->id); |
87f0e418 LP |
1059 | } |
1060 | ||
eef85c4a LP |
1061 | static void print_unit_dependency_mask(FILE *f, const char *kind, UnitDependencyMask mask, bool *space) { |
1062 | const struct { | |
1063 | UnitDependencyMask mask; | |
1064 | const char *name; | |
1065 | } table[] = { | |
1066 | { UNIT_DEPENDENCY_FILE, "file" }, | |
1067 | { UNIT_DEPENDENCY_IMPLICIT, "implicit" }, | |
1068 | { UNIT_DEPENDENCY_DEFAULT, "default" }, | |
1069 | { UNIT_DEPENDENCY_UDEV, "udev" }, | |
1070 | { UNIT_DEPENDENCY_PATH, "path" }, | |
1071 | { UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT, "mountinfo-implicit" }, | |
1072 | { UNIT_DEPENDENCY_MOUNTINFO_DEFAULT, "mountinfo-default" }, | |
1073 | { UNIT_DEPENDENCY_PROC_SWAP, "proc-swap" }, | |
1074 | }; | |
1075 | size_t i; | |
1076 | ||
1077 | assert(f); | |
1078 | assert(kind); | |
1079 | assert(space); | |
1080 | ||
1081 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
1082 | ||
1083 | if (mask == 0) | |
1084 | break; | |
1085 | ||
d94a24ca | 1086 | if (FLAGS_SET(mask, table[i].mask)) { |
eef85c4a LP |
1087 | if (*space) |
1088 | fputc(' ', f); | |
1089 | else | |
1090 | *space = true; | |
1091 | ||
1092 | fputs(kind, f); | |
1093 | fputs("-", f); | |
1094 | fputs(table[i].name, f); | |
1095 | ||
1096 | mask &= ~table[i].mask; | |
1097 | } | |
1098 | } | |
1099 | ||
1100 | assert(mask == 0); | |
1101 | } | |
1102 | ||
87f0e418 | 1103 | void unit_dump(Unit *u, FILE *f, const char *prefix) { |
49dbfa7b | 1104 | char *t, **j; |
87f0e418 LP |
1105 | UnitDependency d; |
1106 | Iterator i; | |
47be870b | 1107 | const char *prefix2; |
173e3821 | 1108 | char |
a483fb59 | 1109 | timestamp0[FORMAT_TIMESTAMP_MAX], |
173e3821 LP |
1110 | timestamp1[FORMAT_TIMESTAMP_MAX], |
1111 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
1112 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
1113 | timestamp4[FORMAT_TIMESTAMP_MAX], |
1114 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 1115 | Unit *following; |
eeaedb7c | 1116 | _cleanup_set_free_ Set *following_set = NULL; |
05a98afd | 1117 | const char *n; |
02638280 LP |
1118 | CGroupMask m; |
1119 | int r; | |
87f0e418 LP |
1120 | |
1121 | assert(u); | |
ac155bb8 | 1122 | assert(u->type >= 0); |
87f0e418 | 1123 | |
4c940960 | 1124 | prefix = strempty(prefix); |
63c372cb | 1125 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
1126 | |
1127 | fprintf(f, | |
40d50879 | 1128 | "%s-> Unit %s:\n" |
87f0e418 | 1129 | "%s\tDescription: %s\n" |
9e2f7c11 | 1130 | "%s\tInstance: %s\n" |
87f0e418 | 1131 | "%s\tUnit Load State: %s\n" |
2fad8195 | 1132 | "%s\tUnit Active State: %s\n" |
b895d155 | 1133 | "%s\tState Change Timestamp: %s\n" |
173e3821 | 1134 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 1135 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 1136 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 1137 | "%s\tInactive Enter Timestamp: %s\n" |
f2f725e5 | 1138 | "%s\tMay GC: %s\n" |
9444b1f2 | 1139 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 1140 | "%s\tTransient: %s\n" |
f5869324 | 1141 | "%s\tPerpetual: %s\n" |
5afe510c | 1142 | "%s\tGarbage Collection Mode: %s\n" |
4ad49000 LP |
1143 | "%s\tSlice: %s\n" |
1144 | "%s\tCGroup: %s\n" | |
aae7e17f | 1145 | "%s\tCGroup realized: %s\n", |
ac155bb8 | 1146 | prefix, u->id, |
87f0e418 | 1147 | prefix, unit_description(u), |
ac155bb8 MS |
1148 | prefix, strna(u->instance), |
1149 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 1150 | prefix, unit_active_state_to_string(unit_active_state(u)), |
a483fb59 | 1151 | prefix, strna(format_timestamp(timestamp0, sizeof(timestamp0), u->state_change_timestamp.realtime)), |
ac155bb8 MS |
1152 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
1153 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
1154 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
1155 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
f2f725e5 | 1156 | prefix, yes_no(unit_may_gc(u)), |
9444b1f2 | 1157 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 1158 | prefix, yes_no(u->transient), |
f5869324 | 1159 | prefix, yes_no(u->perpetual), |
5afe510c | 1160 | prefix, collect_mode_to_string(u->collect_mode), |
4ad49000 LP |
1161 | prefix, strna(unit_slice_name(u)), |
1162 | prefix, strna(u->cgroup_path), | |
aae7e17f FB |
1163 | prefix, yes_no(u->cgroup_realized)); |
1164 | ||
1165 | if (u->cgroup_realized_mask != 0) { | |
1166 | _cleanup_free_ char *s = NULL; | |
1167 | (void) cg_mask_to_string(u->cgroup_realized_mask, &s); | |
02638280 LP |
1168 | fprintf(f, "%s\tCGroup realized mask: %s\n", prefix, strnull(s)); |
1169 | } | |
0adf88b6 | 1170 | |
02638280 LP |
1171 | if (u->cgroup_enabled_mask != 0) { |
1172 | _cleanup_free_ char *s = NULL; | |
1173 | (void) cg_mask_to_string(u->cgroup_enabled_mask, &s); | |
1174 | fprintf(f, "%s\tCGroup enabled mask: %s\n", prefix, strnull(s)); | |
1175 | } | |
0adf88b6 | 1176 | |
02638280 LP |
1177 | m = unit_get_own_mask(u); |
1178 | if (m != 0) { | |
1179 | _cleanup_free_ char *s = NULL; | |
1180 | (void) cg_mask_to_string(m, &s); | |
1181 | fprintf(f, "%s\tCGroup own mask: %s\n", prefix, strnull(s)); | |
aae7e17f | 1182 | } |
0adf88b6 | 1183 | |
02638280 LP |
1184 | m = unit_get_members_mask(u); |
1185 | if (m != 0) { | |
aae7e17f | 1186 | _cleanup_free_ char *s = NULL; |
02638280 | 1187 | (void) cg_mask_to_string(m, &s); |
aae7e17f FB |
1188 | fprintf(f, "%s\tCGroup members mask: %s\n", prefix, strnull(s)); |
1189 | } | |
0301abf4 | 1190 | |
0adf88b6 LP |
1191 | m = unit_get_delegate_mask(u); |
1192 | if (m != 0) { | |
1193 | _cleanup_free_ char *s = NULL; | |
1194 | (void) cg_mask_to_string(m, &s); | |
1195 | fprintf(f, "%s\tCGroup delegate mask: %s\n", prefix, strnull(s)); | |
1196 | } | |
1197 | ||
ac155bb8 | 1198 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
1199 | fprintf(f, "%s\tName: %s\n", prefix, t); |
1200 | ||
4b58153d LP |
1201 | if (!sd_id128_is_null(u->invocation_id)) |
1202 | fprintf(f, "%s\tInvocation ID: " SD_ID128_FORMAT_STR "\n", | |
1203 | prefix, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
1204 | ||
49dbfa7b LP |
1205 | STRV_FOREACH(j, u->documentation) |
1206 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
1207 | ||
eeaedb7c LP |
1208 | following = unit_following(u); |
1209 | if (following) | |
ac155bb8 | 1210 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 1211 | |
eeaedb7c LP |
1212 | r = unit_following_set(u, &following_set); |
1213 | if (r >= 0) { | |
1214 | Unit *other; | |
1215 | ||
1216 | SET_FOREACH(other, following_set, i) | |
1217 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
1218 | } | |
1219 | ||
ac155bb8 MS |
1220 | if (u->fragment_path) |
1221 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 1222 | |
1b64d026 LP |
1223 | if (u->source_path) |
1224 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
1225 | ||
ae7a7182 | 1226 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 1227 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 1228 | |
e7dfbb4e LP |
1229 | if (u->failure_action != EMERGENCY_ACTION_NONE) |
1230 | fprintf(f, "%s\tFailure Action: %s\n", prefix, emergency_action_to_string(u->failure_action)); | |
7af67e9a LP |
1231 | if (u->failure_action_exit_status >= 0) |
1232 | fprintf(f, "%s\tFailure Action Exit Status: %i\n", prefix, u->failure_action_exit_status); | |
e7dfbb4e LP |
1233 | if (u->success_action != EMERGENCY_ACTION_NONE) |
1234 | fprintf(f, "%s\tSuccess Action: %s\n", prefix, emergency_action_to_string(u->success_action)); | |
7af67e9a LP |
1235 | if (u->success_action_exit_status >= 0) |
1236 | fprintf(f, "%s\tSuccess Action Exit Status: %i\n", prefix, u->success_action_exit_status); | |
e7dfbb4e | 1237 | |
36c16a7c | 1238 | if (u->job_timeout != USEC_INFINITY) |
2fa4092c | 1239 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 1240 | |
87a47f99 LN |
1241 | if (u->job_timeout_action != EMERGENCY_ACTION_NONE) |
1242 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, emergency_action_to_string(u->job_timeout_action)); | |
f189ab18 LP |
1243 | |
1244 | if (u->job_timeout_reboot_arg) | |
1245 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
1246 | ||
59fccdc5 LP |
1247 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
1248 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 1249 | |
ac155bb8 | 1250 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
1251 | fprintf(f, |
1252 | "%s\tCondition Timestamp: %s\n" | |
1253 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
1254 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
1255 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 1256 | |
59fccdc5 LP |
1257 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
1258 | fprintf(f, | |
1259 | "%s\tAssert Timestamp: %s\n" | |
1260 | "%s\tAssert Result: %s\n", | |
1261 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
1262 | prefix, yes_no(u->assert_result)); | |
1263 | ||
87f0e418 | 1264 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
eef85c4a | 1265 | UnitDependencyInfo di; |
87f0e418 LP |
1266 | Unit *other; |
1267 | ||
eef85c4a LP |
1268 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { |
1269 | bool space = false; | |
1270 | ||
1271 | fprintf(f, "%s\t%s: %s (", prefix, unit_dependency_to_string(d), other->id); | |
1272 | ||
1273 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); | |
1274 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1275 | ||
1276 | fputs(")\n", f); | |
1277 | } | |
87f0e418 LP |
1278 | } |
1279 | ||
eef85c4a LP |
1280 | if (!hashmap_isempty(u->requires_mounts_for)) { |
1281 | UnitDependencyInfo di; | |
1282 | const char *path; | |
1283 | ||
1284 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { | |
1285 | bool space = false; | |
7c8fa05c | 1286 | |
eef85c4a | 1287 | fprintf(f, "%s\tRequiresMountsFor: %s (", prefix, path); |
7c8fa05c | 1288 | |
eef85c4a LP |
1289 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); |
1290 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1291 | ||
1292 | fputs(")\n", f); | |
1293 | } | |
7c8fa05c LP |
1294 | } |
1295 | ||
ac155bb8 | 1296 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 1297 | |
b0650475 | 1298 | fprintf(f, |
a40eb732 | 1299 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
1300 | "%s\tRefuseManualStart: %s\n" |
1301 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 1302 | "%s\tDefaultDependencies: %s\n" |
d420282b | 1303 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1304 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1305 | prefix, yes_no(u->stop_when_unneeded), |
1306 | prefix, yes_no(u->refuse_manual_start), | |
1307 | prefix, yes_no(u->refuse_manual_stop), | |
1308 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1309 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1310 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 1311 | |
23a177ef LP |
1312 | if (UNIT_VTABLE(u)->dump) |
1313 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1314 | |
ac155bb8 | 1315 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1316 | fprintf(f, |
1317 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1318 | prefix, u->merged_into->id); |
1319 | else if (u->load_state == UNIT_ERROR) | |
1320 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 1321 | |
05a98afd LP |
1322 | for (n = sd_bus_track_first(u->bus_track); n; n = sd_bus_track_next(u->bus_track)) |
1323 | fprintf(f, "%s\tBus Ref: %s\n", prefix, n); | |
87f0e418 | 1324 | |
ac155bb8 MS |
1325 | if (u->job) |
1326 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1327 | |
e0209d83 MS |
1328 | if (u->nop_job) |
1329 | job_dump(u->nop_job, f, prefix2); | |
87f0e418 LP |
1330 | } |
1331 | ||
1332 | /* Common implementation for multiple backends */ | |
e537352b | 1333 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1334 | int r; |
1335 | ||
1336 | assert(u); | |
23a177ef | 1337 | |
e48614c4 | 1338 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1339 | r = unit_load_fragment(u); |
1340 | if (r < 0) | |
23a177ef LP |
1341 | return r; |
1342 | ||
ac155bb8 | 1343 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1344 | return -ENOENT; |
1345 | ||
9e4ea9cc ZJS |
1346 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1347 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1348 | * been loaded and which not, at least without doing complicated book-keeping, | |
1349 | * so let's always reread all drop-ins. */ | |
1350 | return unit_load_dropin(unit_follow_merge(u)); | |
23a177ef LP |
1351 | } |
1352 | ||
1353 | /* Common implementation for multiple backends */ | |
e537352b | 1354 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1355 | int r; |
87f0e418 LP |
1356 | |
1357 | assert(u); | |
1358 | ||
23a177ef LP |
1359 | /* Same as unit_load_fragment_and_dropin(), but whether |
1360 | * something can be loaded or not doesn't matter. */ | |
1361 | ||
e9e8cbc8 | 1362 | /* Load a .service/.socket/.slice/… file */ |
4ad49000 LP |
1363 | r = unit_load_fragment(u); |
1364 | if (r < 0) | |
87f0e418 LP |
1365 | return r; |
1366 | ||
ac155bb8 MS |
1367 | if (u->load_state == UNIT_STUB) |
1368 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1369 | |
9e4ea9cc ZJS |
1370 | /* Load drop-in directory data */ |
1371 | return unit_load_dropin(unit_follow_merge(u)); | |
87f0e418 LP |
1372 | } |
1373 | ||
19496554 MS |
1374 | void unit_add_to_target_deps_queue(Unit *u) { |
1375 | Manager *m = u->manager; | |
1376 | ||
1377 | assert(u); | |
1378 | ||
1379 | if (u->in_target_deps_queue) | |
1380 | return; | |
1381 | ||
1382 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1383 | u->in_target_deps_queue = true; | |
1384 | } | |
1385 | ||
bba34eed | 1386 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1387 | assert(u); |
1388 | assert(target); | |
1389 | ||
ac155bb8 | 1390 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1391 | return 0; |
1392 | ||
35b8ca3a | 1393 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1394 | * that loop check below is reliable */ |
ac155bb8 MS |
1395 | if (u->load_state != UNIT_LOADED || |
1396 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1397 | return 0; |
1398 | ||
21256a2b LP |
1399 | /* If either side wants no automatic dependencies, then let's |
1400 | * skip this */ | |
ac155bb8 MS |
1401 | if (!u->default_dependencies || |
1402 | !target->default_dependencies) | |
21256a2b LP |
1403 | return 0; |
1404 | ||
98bc2000 | 1405 | /* Don't create loops */ |
eef85c4a | 1406 | if (hashmap_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1407 | return 0; |
1408 | ||
eef85c4a | 1409 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1410 | } |
1411 | ||
e954c9cf | 1412 | static int unit_add_slice_dependencies(Unit *u) { |
eef85c4a | 1413 | UnitDependencyMask mask; |
e954c9cf | 1414 | assert(u); |
b81884e7 | 1415 | |
35b7ff80 | 1416 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1417 | return 0; |
1418 | ||
eef85c4a LP |
1419 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1420 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1421 | relationship). */ | |
1422 | mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; | |
1423 | ||
e954c9cf | 1424 | if (UNIT_ISSET(u->slice)) |
eef85c4a | 1425 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true, mask); |
e954c9cf | 1426 | |
8c8da0e0 | 1427 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1428 | return 0; |
1429 | ||
5a724170 | 1430 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, true, mask); |
98bc2000 LP |
1431 | } |
1432 | ||
e954c9cf | 1433 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1434 | UnitDependencyInfo di; |
1435 | const char *path; | |
1436 | Iterator i; | |
9588bc32 LP |
1437 | int r; |
1438 | ||
1439 | assert(u); | |
1440 | ||
eef85c4a LP |
1441 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { |
1442 | char prefix[strlen(path) + 1]; | |
9588bc32 | 1443 | |
eef85c4a | 1444 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1445 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1446 | Unit *m; |
1447 | ||
c7c89abb | 1448 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1449 | if (r < 0) |
1450 | return r; | |
c7c89abb FB |
1451 | |
1452 | m = manager_get_unit(u->manager, p); | |
1453 | if (!m) { | |
1454 | /* Make sure to load the mount unit if | |
1455 | * it exists. If so the dependencies | |
1456 | * on this unit will be added later | |
1457 | * during the loading of the mount | |
1458 | * unit. */ | |
1459 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1460 | continue; |
c7c89abb | 1461 | } |
9588bc32 LP |
1462 | if (m == u) |
1463 | continue; | |
1464 | ||
1465 | if (m->load_state != UNIT_LOADED) | |
1466 | continue; | |
1467 | ||
eef85c4a | 1468 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1469 | if (r < 0) |
1470 | return r; | |
1471 | ||
1472 | if (m->fragment_path) { | |
eef85c4a | 1473 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1474 | if (r < 0) |
1475 | return r; | |
1476 | } | |
1477 | } | |
1478 | } | |
1479 | ||
1480 | return 0; | |
1481 | } | |
1482 | ||
95ae05c0 WC |
1483 | static int unit_add_startup_units(Unit *u) { |
1484 | CGroupContext *c; | |
5269eb6b | 1485 | int r; |
95ae05c0 WC |
1486 | |
1487 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1488 | if (!c) |
1489 | return 0; | |
1490 | ||
d53d9474 | 1491 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1492 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1493 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1494 | return 0; |
1495 | ||
5269eb6b LP |
1496 | r = set_ensure_allocated(&u->manager->startup_units, NULL); |
1497 | if (r < 0) | |
1498 | return r; | |
1499 | ||
756c09e6 | 1500 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1501 | } |
1502 | ||
87f0e418 LP |
1503 | int unit_load(Unit *u) { |
1504 | int r; | |
1505 | ||
1506 | assert(u); | |
1507 | ||
ac155bb8 | 1508 | if (u->in_load_queue) { |
71fda00f | 1509 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1510 | u->in_load_queue = false; |
87f0e418 LP |
1511 | } |
1512 | ||
ac155bb8 | 1513 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1514 | return -EINVAL; |
1515 | ||
ac155bb8 | 1516 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1517 | return 0; |
1518 | ||
4f4afc88 | 1519 | if (u->transient_file) { |
66fa4bdd LP |
1520 | /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup |
1521 | * is complete, hence let's synchronize the unit file we just wrote to disk. */ | |
1522 | ||
4f4afc88 LP |
1523 | r = fflush_and_check(u->transient_file); |
1524 | if (r < 0) | |
1525 | goto fail; | |
1526 | ||
50fb00b7 | 1527 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1528 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1529 | } |
1530 | ||
c2756a68 LP |
1531 | if (UNIT_VTABLE(u)->load) { |
1532 | r = UNIT_VTABLE(u)->load(u); | |
1533 | if (r < 0) | |
87f0e418 | 1534 | goto fail; |
c2756a68 | 1535 | } |
23a177ef | 1536 | |
ac155bb8 | 1537 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1538 | r = -ENOENT; |
1539 | goto fail; | |
1540 | } | |
1541 | ||
7c8fa05c | 1542 | if (u->load_state == UNIT_LOADED) { |
19496554 | 1543 | unit_add_to_target_deps_queue(u); |
e954c9cf LP |
1544 | |
1545 | r = unit_add_slice_dependencies(u); | |
1546 | if (r < 0) | |
1547 | goto fail; | |
c2756a68 | 1548 | |
e954c9cf | 1549 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1550 | if (r < 0) |
c2756a68 | 1551 | goto fail; |
7c8fa05c | 1552 | |
95ae05c0 WC |
1553 | r = unit_add_startup_units(u); |
1554 | if (r < 0) | |
1555 | goto fail; | |
1556 | ||
eef85c4a | 1557 | if (u->on_failure_job_mode == JOB_ISOLATE && hashmap_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1558 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
6f40aa45 | 1559 | r = -ENOEXEC; |
c2756a68 LP |
1560 | goto fail; |
1561 | } | |
bc432dc7 | 1562 | |
a2df3ea4 MK |
1563 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1564 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1565 | ||
5af88058 LP |
1566 | /* We finished loading, let's ensure our parents recalculate the members mask */ |
1567 | unit_invalidate_cgroup_members_masks(u); | |
f68319bb LP |
1568 | } |
1569 | ||
ac155bb8 | 1570 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1571 | |
1572 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1573 | unit_add_to_gc_queue(u); |
87f0e418 | 1574 | |
87f0e418 LP |
1575 | return 0; |
1576 | ||
1577 | fail: | |
c4555ad8 LP |
1578 | /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code should hence |
1579 | * return ENOEXEC to ensure units are placed in this state after loading */ | |
1580 | ||
1581 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : | |
1582 | r == -ENOEXEC ? UNIT_BAD_SETTING : | |
1583 | UNIT_ERROR; | |
ac155bb8 | 1584 | u->load_error = r; |
c4555ad8 | 1585 | |
c1e1601e | 1586 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1587 | unit_add_to_gc_queue(u); |
23a177ef | 1588 | |
c4555ad8 | 1589 | return log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
87f0e418 LP |
1590 | } |
1591 | ||
49365733 LP |
1592 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1593 | Condition *c; | |
1594 | int triggered = -1; | |
1595 | ||
1596 | assert(u); | |
1597 | assert(to_string); | |
1598 | ||
1599 | /* If the condition list is empty, then it is true */ | |
1600 | if (!first) | |
1601 | return true; | |
1602 | ||
1603 | /* Otherwise, if all of the non-trigger conditions apply and | |
1604 | * if any of the trigger conditions apply (unless there are | |
1605 | * none) we return true */ | |
1606 | LIST_FOREACH(conditions, c, first) { | |
1607 | int r; | |
1608 | ||
1609 | r = condition_test(c); | |
1610 | if (r < 0) | |
f2341e0a LP |
1611 | log_unit_warning(u, |
1612 | "Couldn't determine result for %s=%s%s%s, assuming failed: %m", | |
49365733 LP |
1613 | to_string(c->type), |
1614 | c->trigger ? "|" : "", | |
1615 | c->negate ? "!" : "", | |
f2341e0a | 1616 | c->parameter); |
49365733 | 1617 | else |
f2341e0a LP |
1618 | log_unit_debug(u, |
1619 | "%s=%s%s%s %s.", | |
49365733 LP |
1620 | to_string(c->type), |
1621 | c->trigger ? "|" : "", | |
1622 | c->negate ? "!" : "", | |
1623 | c->parameter, | |
f2341e0a | 1624 | condition_result_to_string(c->result)); |
49365733 LP |
1625 | |
1626 | if (!c->trigger && r <= 0) | |
1627 | return false; | |
1628 | ||
1629 | if (c->trigger && triggered <= 0) | |
1630 | triggered = r > 0; | |
1631 | } | |
1632 | ||
1633 | return triggered != 0; | |
1634 | } | |
1635 | ||
97a3f4ee | 1636 | static bool unit_test_condition(Unit *u) { |
90bbc946 LP |
1637 | assert(u); |
1638 | ||
ac155bb8 | 1639 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1640 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1641 | |
e18f8852 LP |
1642 | unit_add_to_dbus_queue(u); |
1643 | ||
ac155bb8 | 1644 | return u->condition_result; |
90bbc946 LP |
1645 | } |
1646 | ||
97a3f4ee | 1647 | static bool unit_test_assert(Unit *u) { |
59fccdc5 LP |
1648 | assert(u); |
1649 | ||
1650 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1651 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 | 1652 | |
e18f8852 LP |
1653 | unit_add_to_dbus_queue(u); |
1654 | ||
59fccdc5 LP |
1655 | return u->assert_result; |
1656 | } | |
1657 | ||
df446f96 | 1658 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
5b262f74 LP |
1659 | const char *d; |
1660 | ||
1661 | d = unit_description(u); | |
1662 | if (log_get_show_color()) | |
1663 | d = strjoina(ANSI_HIGHLIGHT, d, ANSI_NORMAL); | |
1664 | ||
df446f96 | 1665 | DISABLE_WARNING_FORMAT_NONLITERAL; |
5b262f74 | 1666 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, status, unit_status_msg_format, d); |
df446f96 LP |
1667 | REENABLE_WARNING; |
1668 | } | |
1669 | ||
97a3f4ee | 1670 | int unit_test_start_limit(Unit *u) { |
429926e9 TR |
1671 | const char *reason; |
1672 | ||
6bf0f408 LP |
1673 | assert(u); |
1674 | ||
7994ac1d | 1675 | if (ratelimit_below(&u->start_limit)) { |
6bf0f408 LP |
1676 | u->start_limit_hit = false; |
1677 | return 0; | |
1678 | } | |
1679 | ||
1680 | log_unit_warning(u, "Start request repeated too quickly."); | |
1681 | u->start_limit_hit = true; | |
1682 | ||
429926e9 TR |
1683 | reason = strjoina("unit ", u->id, " failed"); |
1684 | ||
36c4dc08 LP |
1685 | emergency_action(u->manager, u->start_limit_action, |
1686 | EMERGENCY_ACTION_IS_WATCHDOG|EMERGENCY_ACTION_WARN, | |
1687 | u->reboot_arg, -1, reason); | |
1688 | ||
1689 | return -ECANCELED; | |
6bf0f408 LP |
1690 | } |
1691 | ||
c891efaf | 1692 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1693 | assert(u); |
c891efaf FB |
1694 | |
1695 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1696 | return false; | |
1697 | ||
1698 | /* For some reasons units remaining in the same process group | |
1699 | * as PID 1 fail to acquire the console even if it's not used | |
1700 | * by any process. So skip the confirmation question for them. */ | |
1701 | return !unit_get_exec_context(u)->same_pgrp; | |
1702 | } | |
1703 | ||
631b676b LP |
1704 | static bool unit_verify_deps(Unit *u) { |
1705 | Unit *other; | |
1706 | Iterator j; | |
eef85c4a | 1707 | void *v; |
631b676b LP |
1708 | |
1709 | assert(u); | |
1710 | ||
1711 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with | |
1712 | * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job | |
1713 | * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in | |
1714 | * conjunction with After= as for them any such check would make things entirely racy. */ | |
1715 | ||
eef85c4a | 1716 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], j) { |
631b676b | 1717 | |
eef85c4a | 1718 | if (!hashmap_contains(u->dependencies[UNIT_AFTER], other)) |
631b676b LP |
1719 | continue; |
1720 | ||
1721 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1722 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1723 | return false; | |
1724 | } | |
1725 | } | |
1726 | ||
1727 | return true; | |
1728 | } | |
1729 | ||
9adb6959 | 1730 | /* Errors that aren't really errors: |
6bf0f408 | 1731 | * -EALREADY: Unit is already started. |
9adb6959 | 1732 | * -ECOMM: Condition failed |
6bf0f408 | 1733 | * -EAGAIN: An operation is already in progress. Retry later. |
9adb6959 LP |
1734 | * |
1735 | * Errors that are real errors: | |
1736 | * -EBADR: This unit type does not support starting. | |
2de9b979 | 1737 | * -ECANCELED: Start limit hit, too many requests for now |
6bf0f408 LP |
1738 | * -EPROTO: Assert failed |
1739 | * -EINVAL: Unit not loaded | |
1740 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1741 | * -ENOLINK: The necessary dependencies are not fulfilled. |
d4fd1cf2 | 1742 | * -ESTALE: This unit has been started before and can't be started a second time |
a4191c9f | 1743 | * -ENOENT: This is a triggering unit and unit to trigger is not loaded |
87f0e418 LP |
1744 | */ |
1745 | int unit_start(Unit *u) { | |
1746 | UnitActiveState state; | |
92ab323c | 1747 | Unit *following; |
2de9b979 | 1748 | int r; |
87f0e418 LP |
1749 | |
1750 | assert(u); | |
1751 | ||
5766aca8 LP |
1752 | /* If this is already started, then this will succeed. Note that this will even succeed if this unit |
1753 | * is not startable by the user. This is relied on to detect when we need to wait for units and when | |
1754 | * waiting is finished. */ | |
87f0e418 LP |
1755 | state = unit_active_state(u); |
1756 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1757 | return -EALREADY; | |
1758 | ||
6bf0f408 LP |
1759 | /* Units that aren't loaded cannot be started */ |
1760 | if (u->load_state != UNIT_LOADED) | |
1761 | return -EINVAL; | |
1762 | ||
d4fd1cf2 LP |
1763 | /* Refuse starting scope units more than once */ |
1764 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1765 | return -ESTALE; | |
1766 | ||
5766aca8 LP |
1767 | /* If the conditions failed, don't do anything at all. If we already are activating this call might |
1768 | * still be useful to speed up activation in case there is some hold-off time, but we don't want to | |
1769 | * recheck the condition in that case. */ | |
a82e5507 | 1770 | if (state != UNIT_ACTIVATING && |
2de9b979 LP |
1771 | !unit_test_condition(u)) { |
1772 | ||
1773 | /* Let's also check the start limit here. Normally, the start limit is only checked by the | |
1774 | * .start() method of the unit type after it did some additional checks verifying everything | |
1775 | * is in order (so that those other checks can propagate errors properly). However, if a | |
1776 | * condition check doesn't hold we don't get that far but we should still ensure we are not | |
1777 | * called in a tight loop without a rate limit check enforced, hence do the check here. Note | |
1778 | * that ECOMM is generally not a reason for a job to fail, unlike most other errors here, | |
1779 | * hence the chance is big that any triggering unit for us will trigger us again. Note this | |
1780 | * condition check is a bit different from the condition check inside the per-unit .start() | |
1781 | * function, as this one will not change the unit's state in any way (and we shouldn't here, | |
1782 | * after all the condition failed). */ | |
1783 | ||
1784 | r = unit_test_start_limit(u); | |
1785 | if (r < 0) | |
1786 | return r; | |
1787 | ||
5766aca8 | 1788 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(ECOMM), "Starting requested but condition failed. Not starting unit."); |
2de9b979 | 1789 | } |
52661efd | 1790 | |
59fccdc5 LP |
1791 | /* If the asserts failed, fail the entire job */ |
1792 | if (state != UNIT_ACTIVATING && | |
5766aca8 LP |
1793 | !unit_test_assert(u)) |
1794 | return log_unit_notice_errno(u, SYNTHETIC_ERRNO(EPROTO), "Starting requested but asserts failed."); | |
59fccdc5 | 1795 | |
5766aca8 LP |
1796 | /* Units of types that aren't supported cannot be started. Note that we do this test only after the |
1797 | * condition checks, so that we rather return condition check errors (which are usually not | |
1798 | * considered a true failure) than "not supported" errors (which are considered a failure). | |
d11a7645 LP |
1799 | */ |
1800 | if (!unit_supported(u)) | |
1801 | return -EOPNOTSUPP; | |
1802 | ||
5766aca8 LP |
1803 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine |
1804 | * should have taken care of this already, but let's check this here again. After all, our | |
1805 | * dependencies might not be in effect anymore, due to a reload or due to a failed condition. */ | |
631b676b LP |
1806 | if (!unit_verify_deps(u)) |
1807 | return -ENOLINK; | |
1808 | ||
92ab323c | 1809 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1810 | following = unit_following(u); |
1811 | if (following) { | |
f2341e0a | 1812 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1813 | return unit_start(following); |
1814 | } | |
1815 | ||
1816 | /* If it is stopped, but we cannot start it, then fail */ | |
1817 | if (!UNIT_VTABLE(u)->start) | |
1818 | return -EBADR; | |
1819 | ||
5766aca8 LP |
1820 | /* We don't suppress calls to ->start() here when we are already starting, to allow this request to |
1821 | * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it | |
1822 | * waits for a holdoff timer to elapse before it will start again. */ | |
87f0e418 | 1823 | |
c1e1601e | 1824 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1825 | |
d1a34ae9 | 1826 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1827 | } |
1828 | ||
1829 | bool unit_can_start(Unit *u) { | |
1830 | assert(u); | |
1831 | ||
8ff4d2ab LP |
1832 | if (u->load_state != UNIT_LOADED) |
1833 | return false; | |
1834 | ||
1835 | if (!unit_supported(u)) | |
1836 | return false; | |
1837 | ||
d4fd1cf2 LP |
1838 | /* Scope units may be started only once */ |
1839 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
1840 | return false; | |
1841 | ||
87f0e418 LP |
1842 | return !!UNIT_VTABLE(u)->start; |
1843 | } | |
1844 | ||
2528a7a6 LP |
1845 | bool unit_can_isolate(Unit *u) { |
1846 | assert(u); | |
1847 | ||
1848 | return unit_can_start(u) && | |
ac155bb8 | 1849 | u->allow_isolate; |
2528a7a6 LP |
1850 | } |
1851 | ||
87f0e418 LP |
1852 | /* Errors: |
1853 | * -EBADR: This unit type does not support stopping. | |
1854 | * -EALREADY: Unit is already stopped. | |
1855 | * -EAGAIN: An operation is already in progress. Retry later. | |
1856 | */ | |
1857 | int unit_stop(Unit *u) { | |
1858 | UnitActiveState state; | |
92ab323c | 1859 | Unit *following; |
87f0e418 LP |
1860 | |
1861 | assert(u); | |
1862 | ||
87f0e418 | 1863 | state = unit_active_state(u); |
fdf20a31 | 1864 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1865 | return -EALREADY; |
1866 | ||
0faacd47 LP |
1867 | following = unit_following(u); |
1868 | if (following) { | |
f2341e0a | 1869 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1870 | return unit_stop(following); |
1871 | } | |
1872 | ||
7898b0cf LP |
1873 | if (!UNIT_VTABLE(u)->stop) |
1874 | return -EBADR; | |
1875 | ||
c1e1601e | 1876 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1877 | |
d1a34ae9 | 1878 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1879 | } |
1880 | ||
f5869324 LP |
1881 | bool unit_can_stop(Unit *u) { |
1882 | assert(u); | |
1883 | ||
1884 | if (!unit_supported(u)) | |
1885 | return false; | |
1886 | ||
1887 | if (u->perpetual) | |
1888 | return false; | |
1889 | ||
1890 | return !!UNIT_VTABLE(u)->stop; | |
1891 | } | |
1892 | ||
87f0e418 LP |
1893 | /* Errors: |
1894 | * -EBADR: This unit type does not support reloading. | |
1895 | * -ENOEXEC: Unit is not started. | |
1896 | * -EAGAIN: An operation is already in progress. Retry later. | |
1897 | */ | |
1898 | int unit_reload(Unit *u) { | |
1899 | UnitActiveState state; | |
92ab323c | 1900 | Unit *following; |
87f0e418 LP |
1901 | |
1902 | assert(u); | |
1903 | ||
ac155bb8 | 1904 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1905 | return -EINVAL; |
1906 | ||
87f0e418 LP |
1907 | if (!unit_can_reload(u)) |
1908 | return -EBADR; | |
1909 | ||
1910 | state = unit_active_state(u); | |
e364ad06 | 1911 | if (state == UNIT_RELOADING) |
6255af75 | 1912 | return -EAGAIN; |
87f0e418 | 1913 | |
6a371e23 | 1914 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1915 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1916 | return -ENOEXEC; |
6a371e23 | 1917 | } |
87f0e418 | 1918 | |
e48614c4 ZJS |
1919 | following = unit_following(u); |
1920 | if (following) { | |
f2341e0a | 1921 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1922 | return unit_reload(following); |
1923 | } | |
1924 | ||
c1e1601e | 1925 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1926 | |
f54bcca5 JR |
1927 | if (!UNIT_VTABLE(u)->reload) { |
1928 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
2ad2e41a | 1929 | unit_notify(u, unit_active_state(u), unit_active_state(u), 0); |
f54bcca5 JR |
1930 | return 0; |
1931 | } | |
1932 | ||
d1a34ae9 | 1933 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1934 | } |
1935 | ||
1936 | bool unit_can_reload(Unit *u) { | |
1937 | assert(u); | |
1938 | ||
f54bcca5 JR |
1939 | if (UNIT_VTABLE(u)->can_reload) |
1940 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 1941 | |
eef85c4a | 1942 | if (!hashmap_isempty(u->dependencies[UNIT_PROPAGATES_RELOAD_TO])) |
87f0e418 LP |
1943 | return true; |
1944 | ||
f54bcca5 | 1945 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
1946 | } |
1947 | ||
a3c1168a LP |
1948 | bool unit_is_unneeded(Unit *u) { |
1949 | static const UnitDependency deps[] = { | |
be7d9ff7 | 1950 | UNIT_REQUIRED_BY, |
084918ba | 1951 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1952 | UNIT_WANTED_BY, |
1953 | UNIT_BOUND_BY, | |
1954 | }; | |
a3c1168a | 1955 | size_t j; |
f3bff0eb LP |
1956 | |
1957 | assert(u); | |
1958 | ||
ac155bb8 | 1959 | if (!u->stop_when_unneeded) |
a3c1168a | 1960 | return false; |
f3bff0eb | 1961 | |
a3c1168a LP |
1962 | /* Don't clean up while the unit is transitioning or is even inactive. */ |
1963 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
1964 | return false; | |
1965 | if (u->job) | |
1966 | return false; | |
f3bff0eb | 1967 | |
a3c1168a | 1968 | for (j = 0; j < ELEMENTSOF(deps); j++) { |
eef85c4a LP |
1969 | Unit *other; |
1970 | Iterator i; | |
1971 | void *v; | |
1972 | ||
fda09318 | 1973 | /* If a dependent unit has a job queued, is active or transitioning, or is marked for |
a3c1168a | 1974 | * restart, then don't clean this one up. */ |
b81884e7 | 1975 | |
a3c1168a | 1976 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[deps[j]], i) { |
93d4cb09 | 1977 | if (other->job) |
a3c1168a LP |
1978 | return false; |
1979 | ||
1980 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1981 | return false; | |
1982 | ||
1983 | if (unit_will_restart(other)) | |
1984 | return false; | |
1985 | } | |
bea355da LP |
1986 | } |
1987 | ||
a3c1168a LP |
1988 | return true; |
1989 | } | |
f3bff0eb | 1990 | |
a3c1168a LP |
1991 | static void check_unneeded_dependencies(Unit *u) { |
1992 | ||
1993 | static const UnitDependency deps[] = { | |
1994 | UNIT_REQUIRES, | |
1995 | UNIT_REQUISITE, | |
1996 | UNIT_WANTS, | |
1997 | UNIT_BINDS_TO, | |
1998 | }; | |
1999 | size_t j; | |
2000 | ||
2001 | assert(u); | |
2002 | ||
2003 | /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */ | |
2004 | ||
2005 | for (j = 0; j < ELEMENTSOF(deps); j++) { | |
2006 | Unit *other; | |
2007 | Iterator i; | |
2008 | void *v; | |
2009 | ||
2010 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[deps[j]], i) | |
fda09318 | 2011 | unit_submit_to_stop_when_unneeded_queue(other); |
a3c1168a | 2012 | } |
f3bff0eb LP |
2013 | } |
2014 | ||
ff502445 | 2015 | static void unit_check_binds_to(Unit *u) { |
4afd3348 | 2016 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
ff502445 LP |
2017 | bool stop = false; |
2018 | Unit *other; | |
2019 | Iterator i; | |
eef85c4a | 2020 | void *v; |
67bfdc97 | 2021 | int r; |
ff502445 LP |
2022 | |
2023 | assert(u); | |
2024 | ||
2025 | if (u->job) | |
2026 | return; | |
2027 | ||
2028 | if (unit_active_state(u) != UNIT_ACTIVE) | |
2029 | return; | |
2030 | ||
eef85c4a | 2031 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) { |
ff502445 LP |
2032 | if (other->job) |
2033 | continue; | |
13ddc3fc ZJS |
2034 | |
2035 | if (!other->coldplugged) | |
2036 | /* We might yet create a job for the other unit… */ | |
2037 | continue; | |
ff502445 LP |
2038 | |
2039 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
2040 | continue; | |
2041 | ||
2042 | stop = true; | |
98f738b6 | 2043 | break; |
ff502445 LP |
2044 | } |
2045 | ||
2046 | if (!stop) | |
2047 | return; | |
2048 | ||
595bfe7d | 2049 | /* If stopping a unit fails continuously we might enter a stop |
67bfdc97 LP |
2050 | * loop here, hence stop acting on the service being |
2051 | * unnecessary after a while. */ | |
7994ac1d | 2052 | if (!ratelimit_below(&u->auto_stop_ratelimit)) { |
67bfdc97 LP |
2053 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); |
2054 | return; | |
2055 | } | |
2056 | ||
98f738b6 | 2057 | assert(other); |
f2341e0a | 2058 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
2059 | |
2060 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
4bd29fe5 | 2061 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
67bfdc97 | 2062 | if (r < 0) |
4bd29fe5 | 2063 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
ff502445 LP |
2064 | } |
2065 | ||
87f0e418 LP |
2066 | static void retroactively_start_dependencies(Unit *u) { |
2067 | Iterator i; | |
2068 | Unit *other; | |
eef85c4a | 2069 | void *v; |
87f0e418 LP |
2070 | |
2071 | assert(u); | |
2072 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2073 | ||
eef85c4a LP |
2074 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUIRES], 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_REPLACE, NULL, NULL); |
b81884e7 | 2078 | |
eef85c4a LP |
2079 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) |
2080 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2081 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2082 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
87f0e418 | 2083 | |
eef85c4a LP |
2084 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_WANTS], i) |
2085 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2086 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2087 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL); |
87f0e418 | 2088 | |
eef85c4a | 2089 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 2090 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2091 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
69dd2852 | 2092 | |
eef85c4a | 2093 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 2094 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2095 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
87f0e418 LP |
2096 | } |
2097 | ||
2098 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 | 2099 | Unit *other; |
eef85c4a LP |
2100 | Iterator i; |
2101 | void *v; | |
87f0e418 LP |
2102 | |
2103 | assert(u); | |
2104 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2105 | ||
b81884e7 | 2106 | /* Pull down units which are bound to us recursively if enabled */ |
eef85c4a | 2107 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 2108 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2109 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
cd0504d0 MS |
2110 | } |
2111 | ||
3ecaa09b | 2112 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
2113 | Unit *other; |
2114 | Iterator i; | |
eef85c4a | 2115 | void *v; |
7f66b026 | 2116 | int r; |
c0daa706 LP |
2117 | |
2118 | assert(u); | |
2119 | ||
eef85c4a | 2120 | if (hashmap_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
2121 | return; |
2122 | ||
f2341e0a | 2123 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 2124 | |
eef85c4a | 2125 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_ON_FAILURE], i) { |
7f66b026 | 2126 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
222ae6a8 | 2127 | |
7f66b026 | 2128 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, &error, NULL); |
c1b6628d | 2129 | if (r < 0) |
7f66b026 | 2130 | log_unit_warning_errno(u, r, "Failed to enqueue OnFailure= job, ignoring: %s", bus_error_message(&error, r)); |
222ae6a8 | 2131 | } |
c0daa706 LP |
2132 | } |
2133 | ||
3ecaa09b LP |
2134 | void unit_trigger_notify(Unit *u) { |
2135 | Unit *other; | |
2136 | Iterator i; | |
eef85c4a | 2137 | void *v; |
3ecaa09b LP |
2138 | |
2139 | assert(u); | |
2140 | ||
eef85c4a | 2141 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_TRIGGERED_BY], i) |
3ecaa09b LP |
2142 | if (UNIT_VTABLE(other)->trigger_notify) |
2143 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2144 | } | |
2145 | ||
915b1d01 | 2146 | static int unit_log_resources(Unit *u) { |
915b1d01 | 2147 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + 4]; |
82044702 | 2148 | bool any_traffic = false, have_ip_accounting = false; |
a87b1faa | 2149 | _cleanup_free_ char *igress = NULL, *egress = NULL; |
915b1d01 LP |
2150 | size_t n_message_parts = 0, n_iovec = 0; |
2151 | char* message_parts[3 + 1], *t; | |
2152 | nsec_t nsec = NSEC_INFINITY; | |
2153 | CGroupIPAccountingMetric m; | |
2154 | size_t i; | |
2155 | int r; | |
2156 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2157 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2158 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2159 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2160 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2161 | }; | |
2162 | ||
2163 | assert(u); | |
2164 | ||
2165 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2166 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2167 | * information and the complete data in structured fields. */ | |
2168 | ||
2169 | (void) unit_get_cpu_usage(u, &nsec); | |
2170 | if (nsec != NSEC_INFINITY) { | |
2171 | char buf[FORMAT_TIMESPAN_MAX] = ""; | |
2172 | ||
2173 | /* Format the CPU time for inclusion in the structured log message */ | |
2174 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2175 | r = log_oom(); | |
2176 | goto finish; | |
2177 | } | |
2178 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2179 | ||
2180 | /* Format the CPU time for inclusion in the human language message string */ | |
2181 | format_timespan(buf, sizeof(buf), nsec / NSEC_PER_USEC, USEC_PER_MSEC); | |
ec9d636b | 2182 | t = strjoin("consumed ", buf, " CPU time"); |
915b1d01 LP |
2183 | if (!t) { |
2184 | r = log_oom(); | |
2185 | goto finish; | |
2186 | } | |
2187 | ||
2188 | message_parts[n_message_parts++] = t; | |
2189 | } | |
2190 | ||
2191 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { | |
2192 | char buf[FORMAT_BYTES_MAX] = ""; | |
2193 | uint64_t value = UINT64_MAX; | |
2194 | ||
2195 | assert(ip_fields[m]); | |
2196 | ||
2197 | (void) unit_get_ip_accounting(u, m, &value); | |
2198 | if (value == UINT64_MAX) | |
2199 | continue; | |
82044702 LP |
2200 | |
2201 | have_ip_accounting = true; | |
a87b1faa LP |
2202 | if (value > 0) |
2203 | any_traffic = true; | |
915b1d01 LP |
2204 | |
2205 | /* Format IP accounting data for inclusion in the structured log message */ | |
2206 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2207 | r = log_oom(); | |
2208 | goto finish; | |
2209 | } | |
2210 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2211 | ||
2212 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2213 | * bytes counters (and not for the packets counters) */ | |
a87b1faa LP |
2214 | if (m == CGROUP_IP_INGRESS_BYTES) { |
2215 | assert(!igress); | |
ec9d636b | 2216 | igress = strjoin("received ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2217 | if (!igress) { |
2218 | r = log_oom(); | |
2219 | goto finish; | |
2220 | } | |
2221 | } else if (m == CGROUP_IP_EGRESS_BYTES) { | |
2222 | assert(!egress); | |
ec9d636b | 2223 | egress = strjoin("sent ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2224 | if (!egress) { |
2225 | r = log_oom(); | |
2226 | goto finish; | |
2227 | } | |
2228 | } | |
2229 | } | |
2230 | ||
82044702 LP |
2231 | if (have_ip_accounting) { |
2232 | if (any_traffic) { | |
2233 | if (igress) | |
2234 | message_parts[n_message_parts++] = TAKE_PTR(igress); | |
2235 | if (egress) | |
2236 | message_parts[n_message_parts++] = TAKE_PTR(egress); | |
a87b1faa | 2237 | |
82044702 LP |
2238 | } else { |
2239 | char *k; | |
915b1d01 | 2240 | |
82044702 LP |
2241 | k = strdup("no IP traffic"); |
2242 | if (!k) { | |
2243 | r = log_oom(); | |
2244 | goto finish; | |
2245 | } | |
2246 | ||
2247 | message_parts[n_message_parts++] = k; | |
2248 | } | |
915b1d01 LP |
2249 | } |
2250 | ||
2251 | /* Is there any accounting data available at all? */ | |
2252 | if (n_iovec == 0) { | |
2253 | r = 0; | |
2254 | goto finish; | |
2255 | } | |
2256 | ||
2257 | if (n_message_parts == 0) | |
a87b1faa | 2258 | t = strjoina("MESSAGE=", u->id, ": Completed."); |
915b1d01 LP |
2259 | else { |
2260 | _cleanup_free_ char *joined; | |
2261 | ||
2262 | message_parts[n_message_parts] = NULL; | |
2263 | ||
2264 | joined = strv_join(message_parts, ", "); | |
2265 | if (!joined) { | |
2266 | r = log_oom(); | |
2267 | goto finish; | |
2268 | } | |
2269 | ||
ec9d636b | 2270 | joined[0] = ascii_toupper(joined[0]); |
a87b1faa | 2271 | t = strjoina("MESSAGE=", u->id, ": ", joined, "."); |
915b1d01 LP |
2272 | } |
2273 | ||
2274 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2275 | * and hence don't increase n_iovec for them */ | |
2276 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2277 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2278 | ||
2279 | t = strjoina(u->manager->unit_log_field, u->id); | |
2280 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2281 | ||
2282 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2283 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2284 | ||
2285 | log_struct_iovec(LOG_INFO, iovec, n_iovec + 4); | |
2286 | r = 0; | |
2287 | ||
2288 | finish: | |
2289 | for (i = 0; i < n_message_parts; i++) | |
2290 | free(message_parts[i]); | |
2291 | ||
2292 | for (i = 0; i < n_iovec; i++) | |
2293 | free(iovec[i].iov_base); | |
2294 | ||
2295 | return r; | |
2296 | ||
2297 | } | |
2298 | ||
adefcf28 LP |
2299 | static void unit_update_on_console(Unit *u) { |
2300 | bool b; | |
2301 | ||
2302 | assert(u); | |
2303 | ||
2304 | b = unit_needs_console(u); | |
2305 | if (u->on_console == b) | |
2306 | return; | |
2307 | ||
2308 | u->on_console = b; | |
2309 | if (b) | |
2310 | manager_ref_console(u->manager); | |
2311 | else | |
2312 | manager_unref_console(u->manager); | |
adefcf28 LP |
2313 | } |
2314 | ||
6eb65e7c LP |
2315 | static void unit_emit_audit_start(Unit *u) { |
2316 | assert(u); | |
2317 | ||
2318 | if (u->type != UNIT_SERVICE) | |
2319 | return; | |
2320 | ||
2321 | /* Write audit record if we have just finished starting up */ | |
2322 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); | |
2323 | u->in_audit = true; | |
2324 | } | |
2325 | ||
2326 | static void unit_emit_audit_stop(Unit *u, UnitActiveState state) { | |
2327 | assert(u); | |
2328 | ||
2329 | if (u->type != UNIT_SERVICE) | |
2330 | return; | |
2331 | ||
2332 | if (u->in_audit) { | |
2333 | /* Write audit record if we have just finished shutting down */ | |
2334 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, state == UNIT_INACTIVE); | |
2335 | u->in_audit = false; | |
2336 | } else { | |
2337 | /* Hmm, if there was no start record written write it now, so that we always have a nice pair */ | |
2338 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, state == UNIT_INACTIVE); | |
2339 | ||
2340 | if (state == UNIT_INACTIVE) | |
2341 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); | |
2342 | } | |
2343 | } | |
2344 | ||
16c74914 LP |
2345 | static bool unit_process_job(Job *j, UnitActiveState ns, UnitNotifyFlags flags) { |
2346 | bool unexpected = false; | |
2347 | ||
2348 | assert(j); | |
2349 | ||
2350 | if (j->state == JOB_WAITING) | |
2351 | ||
2352 | /* So we reached a different state for this job. Let's see if we can run it now if it failed previously | |
2353 | * due to EAGAIN. */ | |
2354 | job_add_to_run_queue(j); | |
2355 | ||
2356 | /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and | |
2357 | * hence needs to invalidate jobs. */ | |
2358 | ||
2359 | switch (j->type) { | |
2360 | ||
2361 | case JOB_START: | |
2362 | case JOB_VERIFY_ACTIVE: | |
2363 | ||
2364 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
2365 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2366 | else if (j->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
2367 | unexpected = true; | |
2368 | ||
2369 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2370 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2371 | } | |
2372 | ||
2373 | break; | |
2374 | ||
2375 | case JOB_RELOAD: | |
2376 | case JOB_RELOAD_OR_START: | |
2377 | case JOB_TRY_RELOAD: | |
2378 | ||
2379 | if (j->state == JOB_RUNNING) { | |
2380 | if (ns == UNIT_ACTIVE) | |
2381 | job_finish_and_invalidate(j, (flags & UNIT_NOTIFY_RELOAD_FAILURE) ? JOB_FAILED : JOB_DONE, true, false); | |
2382 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { | |
2383 | unexpected = true; | |
2384 | ||
2385 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2386 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2387 | } | |
2388 | } | |
2389 | ||
2390 | break; | |
2391 | ||
2392 | case JOB_STOP: | |
2393 | case JOB_RESTART: | |
2394 | case JOB_TRY_RESTART: | |
2395 | ||
2396 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2397 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2398 | else if (j->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
2399 | unexpected = true; | |
2400 | job_finish_and_invalidate(j, JOB_FAILED, true, false); | |
2401 | } | |
2402 | ||
2403 | break; | |
2404 | ||
2405 | default: | |
2406 | assert_not_reached("Job type unknown"); | |
2407 | } | |
2408 | ||
2409 | return unexpected; | |
2410 | } | |
2411 | ||
2ad2e41a | 2412 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, UnitNotifyFlags flags) { |
429926e9 | 2413 | const char *reason; |
8559b3b7 | 2414 | Manager *m; |
a096ed36 | 2415 | |
87f0e418 LP |
2416 | assert(u); |
2417 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2418 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2419 | |
8559b3b7 LP |
2420 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2421 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2422 | * remounted this function will be called too! */ | |
87f0e418 | 2423 | |
546ac4f0 MS |
2424 | m = u->manager; |
2425 | ||
3c4832ad LP |
2426 | /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in |
2427 | * the bus queue, so that any job change signal queued will force out the unit change signal first. */ | |
2428 | unit_add_to_dbus_queue(u); | |
2429 | ||
f755e3b7 | 2430 | /* Update timestamps for state changes */ |
2c289ea8 | 2431 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2432 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2433 | |
bdbf9951 | 2434 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2435 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2436 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2437 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2438 | |
2439 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2440 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2441 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2442 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2443 | } |
87f0e418 | 2444 | |
865cc19a | 2445 | /* Keep track of failed units */ |
8724defe | 2446 | (void) manager_update_failed_units(m, u, ns == UNIT_FAILED); |
f755e3b7 | 2447 | |
d3070fbd LP |
2448 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2449 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
efdb0237 | 2450 | unit_prune_cgroup(u); |
d3070fbd LP |
2451 | unit_unlink_state_files(u); |
2452 | } | |
fb385181 | 2453 | |
adefcf28 | 2454 | unit_update_on_console(u); |
7ed9f6cd | 2455 | |
2c289ea8 | 2456 | if (!MANAGER_IS_RELOADING(m)) { |
a1c7334b LP |
2457 | bool unexpected; |
2458 | ||
2459 | /* Let's propagate state changes to the job */ | |
2460 | if (u->job) | |
2461 | unexpected = unit_process_job(u->job, ns, flags); | |
2462 | else | |
2463 | unexpected = true; | |
f3bff0eb | 2464 | |
a1c7334b LP |
2465 | /* If this state change happened without being requested by a job, then let's retroactively start or |
2466 | * stop dependencies. We skip that step when deserializing, since we don't want to create any | |
2467 | * additional jobs just because something is already activated. */ | |
bdbf9951 LP |
2468 | |
2469 | if (unexpected) { | |
2470 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2471 | retroactively_start_dependencies(u); | |
2472 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2473 | retroactively_stop_dependencies(u); | |
2474 | } | |
5de9682c | 2475 | |
cd0504d0 | 2476 | /* stop unneeded units regardless if going down was expected or not */ |
a3c1168a | 2477 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
cd0504d0 MS |
2478 | check_unneeded_dependencies(u); |
2479 | ||
bdbf9951 | 2480 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2481 | log_unit_debug(u, "Unit entered failed state."); |
2ad2e41a LP |
2482 | |
2483 | if (!(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
2484 | unit_start_on_failure(u); | |
cd6d0a45 | 2485 | } |
e537352b | 2486 | |
256f65d0 LP |
2487 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns) && !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
2488 | /* This unit just finished starting up */ | |
3b2775c5 | 2489 | |
6eb65e7c | 2490 | unit_emit_audit_start(u); |
546ac4f0 | 2491 | manager_send_unit_plymouth(m, u); |
256f65d0 | 2492 | } |
bdbf9951 | 2493 | |
256f65d0 | 2494 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && !UNIT_IS_INACTIVE_OR_FAILED(os)) { |
915b1d01 | 2495 | /* This unit just stopped/failed. */ |
256f65d0 | 2496 | |
6eb65e7c | 2497 | unit_emit_audit_stop(u, ns); |
915b1d01 | 2498 | unit_log_resources(u); |
cd6d0a45 | 2499 | } |
f278026d LP |
2500 | } |
2501 | ||
31dc1ca3 LP |
2502 | manager_recheck_journal(m); |
2503 | manager_recheck_dbus(m); | |
e63ebf71 | 2504 | |
3ecaa09b | 2505 | unit_trigger_notify(u); |
3b2775c5 | 2506 | |
8724defe | 2507 | if (!MANAGER_IS_RELOADING(m)) { |
8559b3b7 | 2508 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ |
fda09318 | 2509 | unit_submit_to_stop_when_unneeded_queue(u); |
c1e1601e | 2510 | |
8559b3b7 LP |
2511 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens when |
2512 | * something BindsTo= to a Type=oneshot unit, as these units go directly from starting to inactive, | |
ff502445 LP |
2513 | * without ever entering started.) */ |
2514 | unit_check_binds_to(u); | |
53c35a76 | 2515 | |
429926e9 TR |
2516 | if (os != UNIT_FAILED && ns == UNIT_FAILED) { |
2517 | reason = strjoina("unit ", u->id, " failed"); | |
36c4dc08 | 2518 | emergency_action(m, u->failure_action, 0, u->reboot_arg, unit_failure_action_exit_status(u), reason); |
429926e9 TR |
2519 | } else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) { |
2520 | reason = strjoina("unit ", u->id, " succeeded"); | |
36c4dc08 | 2521 | emergency_action(m, u->success_action, 0, u->reboot_arg, unit_success_action_exit_status(u), reason); |
429926e9 | 2522 | } |
ff502445 LP |
2523 | } |
2524 | ||
701cc384 | 2525 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2526 | } |
2527 | ||
f75f613d | 2528 | int unit_watch_pid(Unit *u, pid_t pid, bool exclusive) { |
62a76913 | 2529 | int r; |
a911bb9a | 2530 | |
87f0e418 | 2531 | assert(u); |
62a76913 | 2532 | assert(pid_is_valid(pid)); |
87f0e418 | 2533 | |
62a76913 | 2534 | /* Watch a specific PID */ |
5ba6985b | 2535 | |
f75f613d FB |
2536 | /* Caller might be sure that this PID belongs to this unit only. Let's take this |
2537 | * opportunity to remove any stalled references to this PID as they can be created | |
2538 | * easily (when watching a process which is not our direct child). */ | |
2539 | if (exclusive) | |
2540 | manager_unwatch_pid(u->manager, pid); | |
2541 | ||
d5099efc | 2542 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2543 | if (r < 0) |
2544 | return r; | |
2545 | ||
62a76913 | 2546 | r = hashmap_ensure_allocated(&u->manager->watch_pids, NULL); |
a911bb9a LP |
2547 | if (r < 0) |
2548 | return r; | |
2549 | ||
62a76913 LP |
2550 | /* First try, let's add the unit keyed by "pid". */ |
2551 | r = hashmap_put(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2552 | if (r == -EEXIST) { | |
2553 | Unit **array; | |
2554 | bool found = false; | |
2555 | size_t n = 0; | |
05e343b7 | 2556 | |
62a76913 LP |
2557 | /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points |
2558 | * to an array of Units rather than just a Unit), lists us already. */ | |
a911bb9a | 2559 | |
62a76913 LP |
2560 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); |
2561 | if (array) | |
2562 | for (; array[n]; n++) | |
2563 | if (array[n] == u) | |
2564 | found = true; | |
a911bb9a | 2565 | |
62a76913 LP |
2566 | if (found) /* Found it already? if so, do nothing */ |
2567 | r = 0; | |
2568 | else { | |
2569 | Unit **new_array; | |
2570 | ||
2571 | /* Allocate a new array */ | |
2572 | new_array = new(Unit*, n + 2); | |
2573 | if (!new_array) | |
2574 | return -ENOMEM; | |
2575 | ||
2576 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2577 | new_array[n] = u; | |
2578 | new_array[n+1] = NULL; | |
2579 | ||
2580 | /* Add or replace the old array */ | |
2581 | r = hashmap_replace(u->manager->watch_pids, PID_TO_PTR(-pid), new_array); | |
2582 | if (r < 0) { | |
2583 | free(new_array); | |
2584 | return r; | |
2585 | } | |
2586 | ||
2587 | free(array); | |
2588 | } | |
2589 | } else if (r < 0) | |
2590 | return r; | |
2591 | ||
2592 | r = set_put(u->pids, PID_TO_PTR(pid)); | |
2593 | if (r < 0) | |
2594 | return r; | |
2595 | ||
2596 | return 0; | |
87f0e418 LP |
2597 | } |
2598 | ||
2599 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
62a76913 LP |
2600 | Unit **array; |
2601 | ||
87f0e418 | 2602 | assert(u); |
62a76913 LP |
2603 | assert(pid_is_valid(pid)); |
2604 | ||
2605 | /* First let's drop the unit in case it's keyed as "pid". */ | |
2606 | (void) hashmap_remove_value(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2607 | ||
2608 | /* Then, let's also drop the unit, in case it's in the array keyed by -pid */ | |
2609 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); | |
2610 | if (array) { | |
2611 | size_t n, m = 0; | |
2612 | ||
2613 | /* Let's iterate through the array, dropping our own entry */ | |
2614 | for (n = 0; array[n]; n++) | |
2615 | if (array[n] != u) | |
2616 | array[m++] = array[n]; | |
2617 | array[m] = NULL; | |
2618 | ||
2619 | if (m == 0) { | |
2620 | /* The array is now empty, remove the entire entry */ | |
2621 | assert(hashmap_remove(u->manager->watch_pids, PID_TO_PTR(-pid)) == array); | |
2622 | free(array); | |
2623 | } | |
2624 | } | |
87f0e418 | 2625 | |
fea72cc0 | 2626 | (void) set_remove(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2627 | } |
2628 | ||
bd44e61b LP |
2629 | void unit_unwatch_all_pids(Unit *u) { |
2630 | assert(u); | |
2631 | ||
2632 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2633 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2634 | |
efdb0237 | 2635 | u->pids = set_free(u->pids); |
a911bb9a LP |
2636 | } |
2637 | ||
50be4f4a LP |
2638 | static void unit_tidy_watch_pids(Unit *u) { |
2639 | pid_t except1, except2; | |
a911bb9a LP |
2640 | Iterator i; |
2641 | void *e; | |
2642 | ||
2643 | assert(u); | |
2644 | ||
2645 | /* Cleans dead PIDs from our list */ | |
2646 | ||
50be4f4a LP |
2647 | except1 = unit_main_pid(u); |
2648 | except2 = unit_control_pid(u); | |
2649 | ||
a911bb9a | 2650 | SET_FOREACH(e, u->pids, i) { |
fea72cc0 | 2651 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2652 | |
2653 | if (pid == except1 || pid == except2) | |
2654 | continue; | |
2655 | ||
9f5650ae | 2656 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2657 | unit_unwatch_pid(u, pid); |
a911bb9a | 2658 | } |
87f0e418 LP |
2659 | } |
2660 | ||
50be4f4a LP |
2661 | static int on_rewatch_pids_event(sd_event_source *s, void *userdata) { |
2662 | Unit *u = userdata; | |
2663 | ||
2664 | assert(s); | |
2665 | assert(u); | |
2666 | ||
2667 | unit_tidy_watch_pids(u); | |
2668 | unit_watch_all_pids(u); | |
2669 | ||
2670 | /* If the PID set is empty now, then let's finish this off. */ | |
2671 | unit_synthesize_cgroup_empty_event(u); | |
2672 | ||
2673 | return 0; | |
2674 | } | |
2675 | ||
2676 | int unit_enqueue_rewatch_pids(Unit *u) { | |
2677 | int r; | |
2678 | ||
2679 | assert(u); | |
2680 | ||
2681 | if (!u->cgroup_path) | |
2682 | return -ENOENT; | |
2683 | ||
2684 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
2685 | if (r < 0) | |
2686 | return r; | |
2687 | if (r > 0) /* On unified we can use proper notifications */ | |
2688 | return 0; | |
2689 | ||
2690 | /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new | |
2691 | * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it | |
2692 | * involves issuing kill(pid, 0) on all processes we watch. */ | |
2693 | ||
2694 | if (!u->rewatch_pids_event_source) { | |
2695 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
2696 | ||
2697 | r = sd_event_add_defer(u->manager->event, &s, on_rewatch_pids_event, u); | |
2698 | if (r < 0) | |
2699 | return log_error_errno(r, "Failed to allocate event source for tidying watched PIDs: %m"); | |
2700 | ||
2701 | r = sd_event_source_set_priority(s, SD_EVENT_PRIORITY_IDLE); | |
2702 | if (r < 0) | |
2703 | return log_error_errno(r, "Failed to adjust priority of event source for tidying watched PIDs: m"); | |
2704 | ||
2705 | (void) sd_event_source_set_description(s, "tidy-watch-pids"); | |
2706 | ||
2707 | u->rewatch_pids_event_source = TAKE_PTR(s); | |
2708 | } | |
2709 | ||
2710 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_ONESHOT); | |
2711 | if (r < 0) | |
2712 | return log_error_errno(r, "Failed to enable event source for tidying watched PIDs: %m"); | |
2713 | ||
2714 | return 0; | |
2715 | } | |
2716 | ||
2717 | void unit_dequeue_rewatch_pids(Unit *u) { | |
2718 | int r; | |
2719 | assert(u); | |
2720 | ||
2721 | if (!u->rewatch_pids_event_source) | |
2722 | return; | |
2723 | ||
2724 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_OFF); | |
2725 | if (r < 0) | |
2726 | log_warning_errno(r, "Failed to disable event source for tidying watched PIDs, ignoring: %m"); | |
2727 | ||
2728 | u->rewatch_pids_event_source = sd_event_source_unref(u->rewatch_pids_event_source); | |
2729 | } | |
2730 | ||
87f0e418 LP |
2731 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2732 | assert(u); | |
2733 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2734 | ||
2735 | switch (j) { | |
2736 | ||
2737 | case JOB_VERIFY_ACTIVE: | |
2738 | case JOB_START: | |
e0209d83 | 2739 | case JOB_NOP: |
f5869324 LP |
2740 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
2741 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueing | |
2742 | * jobs for it. */ | |
87f0e418 LP |
2743 | return true; |
2744 | ||
f5869324 LP |
2745 | case JOB_STOP: |
2746 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
2747 | * external events), hence it makes no sense to permit enqueing such a request either. */ | |
2748 | return !u->perpetual; | |
2749 | ||
87f0e418 LP |
2750 | case JOB_RESTART: |
2751 | case JOB_TRY_RESTART: | |
f5869324 | 2752 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
2753 | |
2754 | case JOB_RELOAD: | |
3282591d | 2755 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2756 | return unit_can_reload(u); |
2757 | ||
2758 | case JOB_RELOAD_OR_START: | |
2759 | return unit_can_reload(u) && unit_can_start(u); | |
2760 | ||
2761 | default: | |
2762 | assert_not_reached("Invalid job type"); | |
2763 | } | |
2764 | } | |
2765 | ||
f2341e0a LP |
2766 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2767 | assert(u); | |
d1fab3fe | 2768 | |
f2341e0a LP |
2769 | /* Only warn about some unit types */ |
2770 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2771 | return; | |
3f3cc397 | 2772 | |
f2341e0a LP |
2773 | if (streq_ptr(u->id, other)) |
2774 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2775 | else | |
2776 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2777 | } |
2778 | ||
eef85c4a LP |
2779 | static int unit_add_dependency_hashmap( |
2780 | Hashmap **h, | |
2781 | Unit *other, | |
2782 | UnitDependencyMask origin_mask, | |
2783 | UnitDependencyMask destination_mask) { | |
2784 | ||
2785 | UnitDependencyInfo info; | |
2786 | int r; | |
2787 | ||
2788 | assert(h); | |
2789 | assert(other); | |
2790 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2791 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2792 | assert(origin_mask > 0 || destination_mask > 0); | |
2793 | ||
2794 | r = hashmap_ensure_allocated(h, NULL); | |
2795 | if (r < 0) | |
2796 | return r; | |
2797 | ||
2798 | assert_cc(sizeof(void*) == sizeof(info)); | |
2799 | ||
2800 | info.data = hashmap_get(*h, other); | |
2801 | if (info.data) { | |
2802 | /* Entry already exists. Add in our mask. */ | |
2803 | ||
d94a24ca ZJS |
2804 | if (FLAGS_SET(origin_mask, info.origin_mask) && |
2805 | FLAGS_SET(destination_mask, info.destination_mask)) | |
eef85c4a LP |
2806 | return 0; /* NOP */ |
2807 | ||
2808 | info.origin_mask |= origin_mask; | |
2809 | info.destination_mask |= destination_mask; | |
2810 | ||
2811 | r = hashmap_update(*h, other, info.data); | |
2812 | } else { | |
2813 | info = (UnitDependencyInfo) { | |
2814 | .origin_mask = origin_mask, | |
2815 | .destination_mask = destination_mask, | |
2816 | }; | |
2817 | ||
2818 | r = hashmap_put(*h, other, info.data); | |
2819 | } | |
2820 | if (r < 0) | |
2821 | return r; | |
2822 | ||
2823 | return 1; | |
2824 | } | |
2825 | ||
2826 | int unit_add_dependency( | |
2827 | Unit *u, | |
2828 | UnitDependency d, | |
2829 | Unit *other, | |
2830 | bool add_reference, | |
2831 | UnitDependencyMask mask) { | |
87f0e418 LP |
2832 | |
2833 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2834 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 2835 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 2836 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 2837 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2838 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 2839 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 2840 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 2841 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 2842 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2843 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2844 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2845 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2846 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2847 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2848 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2849 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2850 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2851 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2852 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2853 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2854 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2855 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2856 | }; |
eef85c4a LP |
2857 | Unit *original_u = u, *original_other = other; |
2858 | int r; | |
87f0e418 LP |
2859 | |
2860 | assert(u); | |
2861 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2862 | assert(other); |
2863 | ||
9f151f29 LP |
2864 | u = unit_follow_merge(u); |
2865 | other = unit_follow_merge(other); | |
2866 | ||
87f0e418 LP |
2867 | /* We won't allow dependencies on ourselves. We will not |
2868 | * consider them an error however. */ | |
d1fab3fe | 2869 | if (u == other) { |
eef85c4a | 2870 | maybe_warn_about_dependency(original_u, original_other->id, d); |
87f0e418 | 2871 | return 0; |
d1fab3fe | 2872 | } |
87f0e418 | 2873 | |
eef85c4a LP |
2874 | if ((d == UNIT_BEFORE && other->type == UNIT_DEVICE) || |
2875 | (d == UNIT_AFTER && u->type == UNIT_DEVICE)) { | |
dd5e7000 ZJS |
2876 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
2877 | return 0; | |
2878 | } | |
2879 | ||
eef85c4a | 2880 | r = unit_add_dependency_hashmap(u->dependencies + d, other, mask, 0); |
613b411c | 2881 | if (r < 0) |
87f0e418 LP |
2882 | return r; |
2883 | ||
eef85c4a LP |
2884 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2885 | r = unit_add_dependency_hashmap(other->dependencies + inverse_table[d], u, 0, mask); | |
613b411c LP |
2886 | if (r < 0) |
2887 | return r; | |
2888 | } | |
2889 | ||
2890 | if (add_reference) { | |
eef85c4a | 2891 | r = unit_add_dependency_hashmap(u->dependencies + UNIT_REFERENCES, other, mask, 0); |
613b411c | 2892 | if (r < 0) |
5de9682c LP |
2893 | return r; |
2894 | ||
eef85c4a | 2895 | r = unit_add_dependency_hashmap(other->dependencies + UNIT_REFERENCED_BY, u, 0, mask); |
613b411c | 2896 | if (r < 0) |
701cc384 | 2897 | return r; |
613b411c | 2898 | } |
87f0e418 | 2899 | |
c1e1601e | 2900 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
2901 | return 0; |
2902 | } | |
0301abf4 | 2903 | |
eef85c4a | 2904 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
2c966c03 LP |
2905 | int r; |
2906 | ||
2907 | assert(u); | |
2908 | ||
eef85c4a | 2909 | r = unit_add_dependency(u, d, other, add_reference, mask); |
3f3cc397 | 2910 | if (r < 0) |
2c966c03 LP |
2911 | return r; |
2912 | ||
eef85c4a | 2913 | return unit_add_dependency(u, e, other, add_reference, mask); |
2c966c03 LP |
2914 | } |
2915 | ||
23e8c796 | 2916 | static int resolve_template(Unit *u, const char *name, char **buf, const char **ret) { |
7410616c | 2917 | int r; |
9e2f7c11 LP |
2918 | |
2919 | assert(u); | |
23e8c796 | 2920 | assert(name); |
7410616c LP |
2921 | assert(buf); |
2922 | assert(ret); | |
9e2f7c11 | 2923 | |
7410616c LP |
2924 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2925 | *buf = NULL; | |
2926 | *ret = name; | |
2927 | return 0; | |
9e2f7c11 LP |
2928 | } |
2929 | ||
ac155bb8 | 2930 | if (u->instance) |
7410616c | 2931 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 2932 | else { |
ae018d9b | 2933 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2934 | |
7410616c LP |
2935 | r = unit_name_to_prefix(u->id, &i); |
2936 | if (r < 0) | |
2937 | return r; | |
9e2f7c11 | 2938 | |
7410616c | 2939 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 2940 | } |
7410616c LP |
2941 | if (r < 0) |
2942 | return r; | |
9e2f7c11 | 2943 | |
7410616c LP |
2944 | *ret = *buf; |
2945 | return 0; | |
9e2f7c11 LP |
2946 | } |
2947 | ||
35d8c19a | 2948 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 2949 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
2950 | Unit *other; |
2951 | int r; | |
2952 | ||
9e2f7c11 | 2953 | assert(u); |
35d8c19a | 2954 | assert(name); |
09b6b09f | 2955 | |
23e8c796 | 2956 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
2957 | if (r < 0) |
2958 | return r; | |
09b6b09f | 2959 | |
35d8c19a | 2960 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
8afbb8e1 LP |
2961 | if (r < 0) |
2962 | return r; | |
9e2f7c11 | 2963 | |
eef85c4a | 2964 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
2965 | } |
2966 | ||
5a724170 | 2967 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 2968 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2969 | Unit *other; |
2970 | int r; | |
2c966c03 LP |
2971 | |
2972 | assert(u); | |
5a724170 | 2973 | assert(name); |
2c966c03 | 2974 | |
23e8c796 | 2975 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
2976 | if (r < 0) |
2977 | return r; | |
2c966c03 | 2978 | |
5a724170 | 2979 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
3f3cc397 | 2980 | if (r < 0) |
68eda4bd | 2981 | return r; |
2c966c03 | 2982 | |
eef85c4a | 2983 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
2984 | } |
2985 | ||
0301abf4 | 2986 | int set_unit_path(const char *p) { |
0301abf4 | 2987 | /* This is mostly for debug purposes */ |
cbe46ead | 2988 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 2989 | return -errno; |
0301abf4 LP |
2990 | |
2991 | return 0; | |
2992 | } | |
88066b3a | 2993 | |
ea430986 | 2994 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2995 | assert(u); |
2996 | ||
ac155bb8 | 2997 | if (!u->id) |
04ade7d2 LP |
2998 | return NULL; |
2999 | ||
48899192 | 3000 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
3001 | } |
3002 | ||
4b58153d LP |
3003 | char *unit_dbus_path_invocation_id(Unit *u) { |
3004 | assert(u); | |
3005 | ||
3006 | if (sd_id128_is_null(u->invocation_id)) | |
3007 | return NULL; | |
3008 | ||
3009 | return unit_dbus_path_from_name(u->invocation_id_string); | |
3010 | } | |
3011 | ||
d79200e2 LP |
3012 | int unit_set_slice(Unit *u, Unit *slice) { |
3013 | assert(u); | |
3014 | assert(slice); | |
3015 | ||
3016 | /* Sets the unit slice if it has not been set before. Is extra | |
3017 | * careful, to only allow this for units that actually have a | |
3018 | * cgroup context. Also, we don't allow to set this for slices | |
3019 | * (since the parent slice is derived from the name). Make | |
3020 | * sure the unit we set is actually a slice. */ | |
3021 | ||
3022 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3023 | return -EOPNOTSUPP; | |
3024 | ||
3025 | if (u->type == UNIT_SLICE) | |
3026 | return -EINVAL; | |
3027 | ||
102ef982 LP |
3028 | if (unit_active_state(u) != UNIT_INACTIVE) |
3029 | return -EBUSY; | |
3030 | ||
d79200e2 LP |
3031 | if (slice->type != UNIT_SLICE) |
3032 | return -EINVAL; | |
3033 | ||
efdb0237 LP |
3034 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
3035 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
3036 | return -EPERM; | |
3037 | ||
d79200e2 LP |
3038 | if (UNIT_DEREF(u->slice) == slice) |
3039 | return 0; | |
3040 | ||
99e66921 TH |
3041 | /* Disallow slice changes if @u is already bound to cgroups */ |
3042 | if (UNIT_ISSET(u->slice) && u->cgroup_realized) | |
d79200e2 LP |
3043 | return -EBUSY; |
3044 | ||
7f7d01ed | 3045 | unit_ref_set(&u->slice, u, slice); |
d79200e2 LP |
3046 | return 1; |
3047 | } | |
3048 | ||
3049 | int unit_set_default_slice(Unit *u) { | |
a8833944 | 3050 | const char *slice_name; |
a016b922 LP |
3051 | Unit *slice; |
3052 | int r; | |
3053 | ||
3054 | assert(u); | |
3055 | ||
9444b1f2 | 3056 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
3057 | return 0; |
3058 | ||
a8833944 LP |
3059 | if (u->instance) { |
3060 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 3061 | |
a8833944 LP |
3062 | /* Implicitly place all instantiated units in their |
3063 | * own per-template slice */ | |
3064 | ||
7410616c LP |
3065 | r = unit_name_to_prefix(u->id, &prefix); |
3066 | if (r < 0) | |
3067 | return r; | |
a8833944 LP |
3068 | |
3069 | /* The prefix is already escaped, but it might include | |
3070 | * "-" which has a special meaning for slice units, | |
3071 | * hence escape it here extra. */ | |
7410616c | 3072 | escaped = unit_name_escape(prefix); |
a8833944 LP |
3073 | if (!escaped) |
3074 | return -ENOMEM; | |
3075 | ||
463d0d15 | 3076 | if (MANAGER_IS_SYSTEM(u->manager)) |
00e7b3c8 | 3077 | slice_name = strjoina("system-", escaped, ".slice"); |
a8833944 | 3078 | else |
00e7b3c8 | 3079 | slice_name = strjoina(escaped, ".slice"); |
a8833944 LP |
3080 | } else |
3081 | slice_name = | |
463d0d15 | 3082 | MANAGER_IS_SYSTEM(u->manager) && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
3083 | ? SPECIAL_SYSTEM_SLICE |
3084 | : SPECIAL_ROOT_SLICE; | |
3085 | ||
3086 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
3087 | if (r < 0) |
3088 | return r; | |
3089 | ||
d79200e2 | 3090 | return unit_set_slice(u, slice); |
a016b922 LP |
3091 | } |
3092 | ||
9444b1f2 LP |
3093 | const char *unit_slice_name(Unit *u) { |
3094 | assert(u); | |
3095 | ||
3096 | if (!UNIT_ISSET(u->slice)) | |
3097 | return NULL; | |
3098 | ||
3099 | return UNIT_DEREF(u->slice)->id; | |
3100 | } | |
3101 | ||
f6ff8c29 | 3102 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 3103 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
3104 | int r; |
3105 | ||
3106 | assert(u); | |
3107 | assert(type); | |
3108 | assert(_found); | |
3109 | ||
7410616c LP |
3110 | r = unit_name_change_suffix(u->id, type, &t); |
3111 | if (r < 0) | |
3112 | return r; | |
3113 | if (unit_has_name(u, t)) | |
3114 | return -EINVAL; | |
f6ff8c29 | 3115 | |
ac155bb8 | 3116 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3117 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3118 | return r; |
3119 | } | |
3120 | ||
bbc29086 DM |
3121 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
3122 | const char *name, *old_owner, *new_owner; | |
3123 | Unit *u = userdata; | |
3124 | int r; | |
3125 | ||
3126 | assert(message); | |
3127 | assert(u); | |
3128 | ||
3129 | r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner); | |
3130 | if (r < 0) { | |
3131 | bus_log_parse_error(r); | |
3132 | return 0; | |
3133 | } | |
3134 | ||
a8ea93a5 LP |
3135 | old_owner = empty_to_null(old_owner); |
3136 | new_owner = empty_to_null(new_owner); | |
b0076268 | 3137 | |
bbc29086 DM |
3138 | if (UNIT_VTABLE(u)->bus_name_owner_change) |
3139 | UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); | |
3140 | ||
3141 | return 0; | |
3142 | } | |
3143 | ||
9806e87d LP |
3144 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3145 | const char *match; | |
bbc29086 | 3146 | |
9806e87d LP |
3147 | assert(u); |
3148 | assert(bus); | |
3149 | assert(name); | |
bbc29086 DM |
3150 | |
3151 | if (u->match_bus_slot) | |
3152 | return -EBUSY; | |
3153 | ||
9806e87d | 3154 | match = strjoina("type='signal'," |
81d62103 ZJS |
3155 | "sender='org.freedesktop.DBus'," |
3156 | "path='/org/freedesktop/DBus'," | |
3157 | "interface='org.freedesktop.DBus'," | |
3158 | "member='NameOwnerChanged'," | |
3159 | "arg0='", name, "'"); | |
bbc29086 | 3160 | |
75152a4d | 3161 | return sd_bus_add_match_async(bus, &u->match_bus_slot, match, signal_name_owner_changed, NULL, u); |
bbc29086 DM |
3162 | } |
3163 | ||
05e343b7 | 3164 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3165 | int r; |
3166 | ||
05e343b7 LP |
3167 | assert(u); |
3168 | assert(name); | |
3169 | ||
3170 | /* Watch a specific name on the bus. We only support one unit | |
3171 | * watching each name for now. */ | |
3172 | ||
bbc29086 DM |
3173 | if (u->manager->api_bus) { |
3174 | /* If the bus is already available, install the match directly. | |
3175 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3176 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3177 | if (r < 0) |
8ea823b6 | 3178 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3179 | } |
3180 | ||
3181 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3182 | if (r < 0) { | |
3183 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3184 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); | |
3185 | } | |
3186 | ||
3187 | return 0; | |
05e343b7 LP |
3188 | } |
3189 | ||
3190 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3191 | assert(u); | |
3192 | assert(name); | |
3193 | ||
8367fea5 | 3194 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3195 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
05e343b7 LP |
3196 | } |
3197 | ||
a16e1123 LP |
3198 | bool unit_can_serialize(Unit *u) { |
3199 | assert(u); | |
3200 | ||
3201 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
3202 | } | |
3203 | ||
d68c645b | 3204 | static int serialize_cgroup_mask(FILE *f, const char *key, CGroupMask mask) { |
8b108bd0 | 3205 | _cleanup_free_ char *s = NULL; |
d68c645b | 3206 | int r; |
8b108bd0 FB |
3207 | |
3208 | assert(f); | |
3209 | assert(key); | |
3210 | ||
d68c645b LP |
3211 | if (mask == 0) |
3212 | return 0; | |
3213 | ||
3214 | r = cg_mask_to_string(mask, &s); | |
3215 | if (r < 0) | |
3216 | return log_error_errno(r, "Failed to format cgroup mask: %m"); | |
3217 | ||
3218 | return serialize_item(f, key, s); | |
8b108bd0 FB |
3219 | } |
3220 | ||
6b659ed8 LP |
3221 | static const char *ip_accounting_metric_field[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { |
3222 | [CGROUP_IP_INGRESS_BYTES] = "ip-accounting-ingress-bytes", | |
3223 | [CGROUP_IP_INGRESS_PACKETS] = "ip-accounting-ingress-packets", | |
3224 | [CGROUP_IP_EGRESS_BYTES] = "ip-accounting-egress-bytes", | |
3225 | [CGROUP_IP_EGRESS_PACKETS] = "ip-accounting-egress-packets", | |
3226 | }; | |
3227 | ||
6b78f9b4 | 3228 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
6b659ed8 | 3229 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3230 | int r; |
3231 | ||
3232 | assert(u); | |
3233 | assert(f); | |
3234 | assert(fds); | |
3235 | ||
9bdb98c5 | 3236 | if (unit_can_serialize(u)) { |
9bdb98c5 | 3237 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
3238 | if (r < 0) |
3239 | return r; | |
e0209d83 MS |
3240 | } |
3241 | ||
d68c645b | 3242 | (void) serialize_dual_timestamp(f, "state-change-timestamp", &u->state_change_timestamp); |
a483fb59 | 3243 | |
d68c645b LP |
3244 | (void) serialize_dual_timestamp(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
3245 | (void) serialize_dual_timestamp(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
3246 | (void) serialize_dual_timestamp(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
3247 | (void) serialize_dual_timestamp(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
a483fb59 | 3248 | |
d68c645b LP |
3249 | (void) serialize_dual_timestamp(f, "condition-timestamp", &u->condition_timestamp); |
3250 | (void) serialize_dual_timestamp(f, "assert-timestamp", &u->assert_timestamp); | |
2791a8f8 | 3251 | |
ac155bb8 | 3252 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
d68c645b | 3253 | (void) serialize_bool(f, "condition-result", u->condition_result); |
10717a1a | 3254 | |
59fccdc5 | 3255 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
d68c645b | 3256 | (void) serialize_bool(f, "assert-result", u->assert_result); |
59fccdc5 | 3257 | |
d68c645b LP |
3258 | (void) serialize_bool(f, "transient", u->transient); |
3259 | (void) serialize_bool(f, "in-audit", u->in_audit); | |
fe700f46 | 3260 | |
d68c645b LP |
3261 | (void) serialize_bool(f, "exported-invocation-id", u->exported_invocation_id); |
3262 | (void) serialize_bool(f, "exported-log-level-max", u->exported_log_level_max); | |
3263 | (void) serialize_bool(f, "exported-log-extra-fields", u->exported_log_extra_fields); | |
3264 | (void) serialize_bool(f, "exported-log-rate-limit-interval", u->exported_log_rate_limit_interval); | |
3265 | (void) serialize_bool(f, "exported-log-rate-limit-burst", u->exported_log_rate_limit_burst); | |
0e699122 | 3266 | |
d68c645b | 3267 | (void) serialize_item_format(f, "cpu-usage-base", "%" PRIu64, u->cpu_usage_base); |
fe700f46 | 3268 | if (u->cpu_usage_last != NSEC_INFINITY) |
d68c645b | 3269 | (void) serialize_item_format(f, "cpu-usage-last", "%" PRIu64, u->cpu_usage_last); |
c2756a68 LP |
3270 | |
3271 | if (u->cgroup_path) | |
d68c645b LP |
3272 | (void) serialize_item(f, "cgroup", u->cgroup_path); |
3273 | ||
3274 | (void) serialize_bool(f, "cgroup-realized", u->cgroup_realized); | |
3275 | (void) serialize_cgroup_mask(f, "cgroup-realized-mask", u->cgroup_realized_mask); | |
3276 | (void) serialize_cgroup_mask(f, "cgroup-enabled-mask", u->cgroup_enabled_mask); | |
3277 | (void) serialize_cgroup_mask(f, "cgroup-invalidated-mask", u->cgroup_invalidated_mask); | |
c2756a68 | 3278 | |
00d9ef85 | 3279 | if (uid_is_valid(u->ref_uid)) |
d68c645b | 3280 | (void) serialize_item_format(f, "ref-uid", UID_FMT, u->ref_uid); |
00d9ef85 | 3281 | if (gid_is_valid(u->ref_gid)) |
d68c645b | 3282 | (void) serialize_item_format(f, "ref-gid", GID_FMT, u->ref_gid); |
00d9ef85 | 3283 | |
4b58153d | 3284 | if (!sd_id128_is_null(u->invocation_id)) |
d68c645b | 3285 | (void) serialize_item_format(f, "invocation-id", SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(u->invocation_id)); |
4b58153d | 3286 | |
05a98afd LP |
3287 | bus_track_serialize(u->bus_track, f, "ref"); |
3288 | ||
6b659ed8 LP |
3289 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
3290 | uint64_t v; | |
3291 | ||
3292 | r = unit_get_ip_accounting(u, m, &v); | |
3293 | if (r >= 0) | |
d68c645b | 3294 | (void) serialize_item_format(f, ip_accounting_metric_field[m], "%" PRIu64, v); |
6b659ed8 LP |
3295 | } |
3296 | ||
613b411c LP |
3297 | if (serialize_jobs) { |
3298 | if (u->job) { | |
d68c645b | 3299 | fputs("job\n", f); |
05a98afd | 3300 | job_serialize(u->job, f); |
613b411c LP |
3301 | } |
3302 | ||
3303 | if (u->nop_job) { | |
d68c645b | 3304 | fputs("job\n", f); |
05a98afd | 3305 | job_serialize(u->nop_job, f); |
613b411c LP |
3306 | } |
3307 | } | |
3308 | ||
a16e1123 LP |
3309 | /* End marker */ |
3310 | fputc('\n', f); | |
3311 | return 0; | |
3312 | } | |
3313 | ||
b17c9620 LP |
3314 | static int unit_deserialize_job(Unit *u, FILE *f) { |
3315 | _cleanup_(job_freep) Job *j = NULL; | |
3316 | int r; | |
3317 | ||
3318 | assert(u); | |
3319 | assert(f); | |
3320 | ||
3321 | j = job_new_raw(u); | |
3322 | if (!j) | |
3323 | return log_oom(); | |
3324 | ||
3325 | r = job_deserialize(j, f); | |
3326 | if (r < 0) | |
3327 | return r; | |
3328 | ||
3329 | r = job_install_deserialized(j); | |
3330 | if (r < 0) | |
3331 | return r; | |
3332 | ||
3333 | TAKE_PTR(j); | |
3334 | return 0; | |
3335 | } | |
3336 | ||
a16e1123 LP |
3337 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
3338 | int r; | |
3339 | ||
3340 | assert(u); | |
3341 | assert(f); | |
3342 | assert(fds); | |
3343 | ||
a16e1123 | 3344 | for (;;) { |
8948b341 | 3345 | _cleanup_free_ char *line = NULL; |
6b659ed8 | 3346 | CGroupIPAccountingMetric m; |
8948b341 | 3347 | char *l, *v; |
a16e1123 LP |
3348 | size_t k; |
3349 | ||
8948b341 LP |
3350 | r = read_line(f, LONG_LINE_MAX, &line); |
3351 | if (r < 0) | |
3352 | return log_error_errno(r, "Failed to read serialization line: %m"); | |
3353 | if (r == 0) /* eof */ | |
3354 | break; | |
a16e1123 LP |
3355 | |
3356 | l = strstrip(line); | |
8948b341 | 3357 | if (isempty(l)) /* End marker */ |
a483fb59 | 3358 | break; |
a16e1123 LP |
3359 | |
3360 | k = strcspn(l, "="); | |
3361 | ||
3362 | if (l[k] == '=') { | |
3363 | l[k] = 0; | |
3364 | v = l+k+1; | |
3365 | } else | |
3366 | v = l+k; | |
3367 | ||
cca098b0 | 3368 | if (streq(l, "job")) { |
39a18c60 | 3369 | if (v[0] == '\0') { |
b17c9620 LP |
3370 | /* New-style serialized job */ |
3371 | r = unit_deserialize_job(u, f); | |
3372 | if (r < 0) | |
e0209d83 | 3373 | return r; |
b17c9620 | 3374 | } else /* Legacy for pre-44 */ |
ed10fa8c | 3375 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); |
cca098b0 | 3376 | continue; |
a483fb59 | 3377 | } else if (streq(l, "state-change-timestamp")) { |
d68c645b | 3378 | (void) deserialize_dual_timestamp(v, &u->state_change_timestamp); |
a483fb59 | 3379 | continue; |
8aaf019b | 3380 | } else if (streq(l, "inactive-exit-timestamp")) { |
d68c645b | 3381 | (void) deserialize_dual_timestamp(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
3382 | continue; |
3383 | } else if (streq(l, "active-enter-timestamp")) { | |
d68c645b | 3384 | (void) deserialize_dual_timestamp(v, &u->active_enter_timestamp); |
8aaf019b LP |
3385 | continue; |
3386 | } else if (streq(l, "active-exit-timestamp")) { | |
d68c645b | 3387 | (void) deserialize_dual_timestamp(v, &u->active_exit_timestamp); |
8aaf019b LP |
3388 | continue; |
3389 | } else if (streq(l, "inactive-enter-timestamp")) { | |
d68c645b | 3390 | (void) deserialize_dual_timestamp(v, &u->inactive_enter_timestamp); |
8aaf019b | 3391 | continue; |
2791a8f8 | 3392 | } else if (streq(l, "condition-timestamp")) { |
d68c645b | 3393 | (void) deserialize_dual_timestamp(v, &u->condition_timestamp); |
2791a8f8 | 3394 | continue; |
59fccdc5 | 3395 | } else if (streq(l, "assert-timestamp")) { |
d68c645b | 3396 | (void) deserialize_dual_timestamp(v, &u->assert_timestamp); |
59fccdc5 | 3397 | continue; |
2791a8f8 | 3398 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 3399 | |
e911de99 LP |
3400 | r = parse_boolean(v); |
3401 | if (r < 0) | |
f2341e0a | 3402 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 3403 | else |
e911de99 | 3404 | u->condition_result = r; |
efbac6d2 LP |
3405 | |
3406 | continue; | |
c2756a68 | 3407 | |
59fccdc5 | 3408 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 3409 | |
e911de99 LP |
3410 | r = parse_boolean(v); |
3411 | if (r < 0) | |
f2341e0a | 3412 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 3413 | else |
e911de99 | 3414 | u->assert_result = r; |
59fccdc5 LP |
3415 | |
3416 | continue; | |
3417 | ||
c2756a68 | 3418 | } else if (streq(l, "transient")) { |
c2756a68 | 3419 | |
e911de99 LP |
3420 | r = parse_boolean(v); |
3421 | if (r < 0) | |
f2341e0a | 3422 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 3423 | else |
e911de99 | 3424 | u->transient = r; |
c2756a68 LP |
3425 | |
3426 | continue; | |
e911de99 | 3427 | |
0e699122 LP |
3428 | } else if (streq(l, "in-audit")) { |
3429 | ||
3430 | r = parse_boolean(v); | |
3431 | if (r < 0) | |
3432 | log_unit_debug(u, "Failed to parse in-audit bool %s, ignoring.", v); | |
3433 | else | |
3434 | u->in_audit = r; | |
3435 | ||
3436 | continue; | |
3437 | ||
d3070fbd LP |
3438 | } else if (streq(l, "exported-invocation-id")) { |
3439 | ||
3440 | r = parse_boolean(v); | |
3441 | if (r < 0) | |
3442 | log_unit_debug(u, "Failed to parse exported invocation ID bool %s, ignoring.", v); | |
3443 | else | |
3444 | u->exported_invocation_id = r; | |
3445 | ||
3446 | continue; | |
3447 | ||
3448 | } else if (streq(l, "exported-log-level-max")) { | |
3449 | ||
3450 | r = parse_boolean(v); | |
3451 | if (r < 0) | |
3452 | log_unit_debug(u, "Failed to parse exported log level max bool %s, ignoring.", v); | |
3453 | else | |
3454 | u->exported_log_level_max = r; | |
3455 | ||
3456 | continue; | |
3457 | ||
3458 | } else if (streq(l, "exported-log-extra-fields")) { | |
3459 | ||
3460 | r = parse_boolean(v); | |
3461 | if (r < 0) | |
3462 | log_unit_debug(u, "Failed to parse exported log extra fields bool %s, ignoring.", v); | |
3463 | else | |
3464 | u->exported_log_extra_fields = r; | |
3465 | ||
3466 | continue; | |
3467 | ||
90fc172e AZ |
3468 | } else if (streq(l, "exported-log-rate-limit-interval")) { |
3469 | ||
3470 | r = parse_boolean(v); | |
3471 | if (r < 0) | |
3472 | log_unit_debug(u, "Failed to parse exported log rate limit interval %s, ignoring.", v); | |
3473 | else | |
3474 | u->exported_log_rate_limit_interval = r; | |
3475 | ||
3476 | continue; | |
3477 | ||
3478 | } else if (streq(l, "exported-log-rate-limit-burst")) { | |
3479 | ||
3480 | r = parse_boolean(v); | |
3481 | if (r < 0) | |
3482 | log_unit_debug(u, "Failed to parse exported log rate limit burst %s, ignoring.", v); | |
3483 | else | |
3484 | u->exported_log_rate_limit_burst = r; | |
3485 | ||
3486 | continue; | |
3487 | ||
fe700f46 | 3488 | } else if (STR_IN_SET(l, "cpu-usage-base", "cpuacct-usage-base")) { |
5ad096b3 | 3489 | |
66ebf6c0 | 3490 | r = safe_atou64(v, &u->cpu_usage_base); |
5ad096b3 | 3491 | if (r < 0) |
fe700f46 LP |
3492 | log_unit_debug(u, "Failed to parse CPU usage base %s, ignoring.", v); |
3493 | ||
3494 | continue; | |
3495 | ||
3496 | } else if (streq(l, "cpu-usage-last")) { | |
3497 | ||
3498 | r = safe_atou64(v, &u->cpu_usage_last); | |
3499 | if (r < 0) | |
3500 | log_unit_debug(u, "Failed to read CPU usage last %s, ignoring.", v); | |
5ad096b3 | 3501 | |
0f908397 | 3502 | continue; |
4e595329 | 3503 | |
e911de99 | 3504 | } else if (streq(l, "cgroup")) { |
72673e86 | 3505 | |
e911de99 LP |
3506 | r = unit_set_cgroup_path(u, v); |
3507 | if (r < 0) | |
f2341e0a | 3508 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 3509 | |
efdb0237 LP |
3510 | (void) unit_watch_cgroup(u); |
3511 | ||
de1d4f9b WF |
3512 | continue; |
3513 | } else if (streq(l, "cgroup-realized")) { | |
3514 | int b; | |
3515 | ||
3516 | b = parse_boolean(v); | |
3517 | if (b < 0) | |
3518 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
3519 | else | |
3520 | u->cgroup_realized = b; | |
3521 | ||
c2756a68 | 3522 | continue; |
00d9ef85 | 3523 | |
8b108bd0 FB |
3524 | } else if (streq(l, "cgroup-realized-mask")) { |
3525 | ||
3526 | r = cg_mask_from_string(v, &u->cgroup_realized_mask); | |
3527 | if (r < 0) | |
3528 | log_unit_debug(u, "Failed to parse cgroup-realized-mask %s, ignoring.", v); | |
3529 | continue; | |
3530 | ||
3531 | } else if (streq(l, "cgroup-enabled-mask")) { | |
3532 | ||
3533 | r = cg_mask_from_string(v, &u->cgroup_enabled_mask); | |
3534 | if (r < 0) | |
3535 | log_unit_debug(u, "Failed to parse cgroup-enabled-mask %s, ignoring.", v); | |
3536 | continue; | |
3537 | ||
17f14955 | 3538 | } else if (streq(l, "cgroup-invalidated-mask")) { |
906c06f6 | 3539 | |
17f14955 | 3540 | r = cg_mask_from_string(v, &u->cgroup_invalidated_mask); |
906c06f6 | 3541 | if (r < 0) |
17f14955 | 3542 | log_unit_debug(u, "Failed to parse cgroup-invalidated-mask %s, ignoring.", v); |
906c06f6 DM |
3543 | continue; |
3544 | ||
00d9ef85 LP |
3545 | } else if (streq(l, "ref-uid")) { |
3546 | uid_t uid; | |
3547 | ||
3548 | r = parse_uid(v, &uid); | |
3549 | if (r < 0) | |
3550 | log_unit_debug(u, "Failed to parse referenced UID %s, ignoring.", v); | |
3551 | else | |
3552 | unit_ref_uid_gid(u, uid, GID_INVALID); | |
3553 | ||
3554 | continue; | |
3555 | ||
3556 | } else if (streq(l, "ref-gid")) { | |
3557 | gid_t gid; | |
3558 | ||
3559 | r = parse_gid(v, &gid); | |
3560 | if (r < 0) | |
3561 | log_unit_debug(u, "Failed to parse referenced GID %s, ignoring.", v); | |
3562 | else | |
3563 | unit_ref_uid_gid(u, UID_INVALID, gid); | |
3564 | ||
5f616d5f LP |
3565 | continue; |
3566 | ||
05a98afd LP |
3567 | } else if (streq(l, "ref")) { |
3568 | ||
3569 | r = strv_extend(&u->deserialized_refs, v); | |
3570 | if (r < 0) | |
d68c645b | 3571 | return log_oom(); |
05a98afd | 3572 | |
4b58153d LP |
3573 | continue; |
3574 | } else if (streq(l, "invocation-id")) { | |
3575 | sd_id128_t id; | |
3576 | ||
3577 | r = sd_id128_from_string(v, &id); | |
3578 | if (r < 0) | |
3579 | log_unit_debug(u, "Failed to parse invocation id %s, ignoring.", v); | |
3580 | else { | |
3581 | r = unit_set_invocation_id(u, id); | |
3582 | if (r < 0) | |
3583 | log_unit_warning_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
3584 | } | |
3585 | ||
00d9ef85 | 3586 | continue; |
8aaf019b | 3587 | } |
cca098b0 | 3588 | |
6b659ed8 LP |
3589 | /* Check if this is an IP accounting metric serialization field */ |
3590 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) | |
3591 | if (streq(l, ip_accounting_metric_field[m])) | |
3592 | break; | |
3593 | if (m < _CGROUP_IP_ACCOUNTING_METRIC_MAX) { | |
3594 | uint64_t c; | |
3595 | ||
3596 | r = safe_atou64(v, &c); | |
3597 | if (r < 0) | |
3598 | log_unit_debug(u, "Failed to parse IP accounting value %s, ignoring.", v); | |
3599 | else | |
3600 | u->ip_accounting_extra[m] = c; | |
3601 | continue; | |
3602 | } | |
3603 | ||
9bdb98c5 | 3604 | if (unit_can_serialize(u)) { |
e8a565cb YW |
3605 | r = exec_runtime_deserialize_compat(u, l, v, fds); |
3606 | if (r < 0) { | |
3607 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); | |
3608 | continue; | |
9bdb98c5 LP |
3609 | } |
3610 | ||
e8a565cb YW |
3611 | /* Returns positive if key was handled by the call */ |
3612 | if (r > 0) | |
3613 | continue; | |
3614 | ||
9bdb98c5 | 3615 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); |
613b411c | 3616 | if (r < 0) |
f2341e0a | 3617 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 3618 | } |
a16e1123 | 3619 | } |
a483fb59 LP |
3620 | |
3621 | /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is | |
3622 | * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from | |
1f133e0d | 3623 | * before 228 where the base for timeouts was not persistent across reboots. */ |
a483fb59 LP |
3624 | |
3625 | if (!dual_timestamp_is_set(&u->state_change_timestamp)) | |
3626 | dual_timestamp_get(&u->state_change_timestamp); | |
3627 | ||
58d83430 LP |
3628 | /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied |
3629 | * after we are done. For that we invalidate anything already realized, so that we can realize it again. */ | |
3630 | unit_invalidate_cgroup(u, _CGROUP_MASK_ALL); | |
3631 | unit_invalidate_cgroup_bpf(u); | |
3632 | ||
a483fb59 | 3633 | return 0; |
a16e1123 LP |
3634 | } |
3635 | ||
8948b341 LP |
3636 | int unit_deserialize_skip(FILE *f) { |
3637 | int r; | |
07429866 ZJS |
3638 | assert(f); |
3639 | ||
3640 | /* Skip serialized data for this unit. We don't know what it is. */ | |
3641 | ||
3642 | for (;;) { | |
8948b341 LP |
3643 | _cleanup_free_ char *line = NULL; |
3644 | char *l; | |
07429866 | 3645 | |
8948b341 LP |
3646 | r = read_line(f, LONG_LINE_MAX, &line); |
3647 | if (r < 0) | |
3648 | return log_error_errno(r, "Failed to read serialization line: %m"); | |
3649 | if (r == 0) | |
3650 | return 0; | |
07429866 | 3651 | |
07429866 ZJS |
3652 | l = strstrip(line); |
3653 | ||
3654 | /* End marker */ | |
3655 | if (isempty(l)) | |
8948b341 | 3656 | return 1; |
07429866 ZJS |
3657 | } |
3658 | } | |
3659 | ||
eef85c4a | 3660 | int unit_add_node_dependency(Unit *u, const char *what, bool wants, UnitDependency dep, UnitDependencyMask mask) { |
6e2ef85b | 3661 | Unit *device; |
68eda4bd | 3662 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
3663 | int r; |
3664 | ||
3665 | assert(u); | |
3666 | ||
6e2ef85b | 3667 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3668 | if (isempty(what)) |
3669 | return 0; | |
6e2ef85b | 3670 | |
8407a5d0 | 3671 | if (!is_device_path(what)) |
6e2ef85b LP |
3672 | return 0; |
3673 | ||
47bc12e1 LP |
3674 | /* When device units aren't supported (such as in a |
3675 | * container), don't create dependencies on them. */ | |
1c2e9646 | 3676 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3677 | return 0; |
3678 | ||
7410616c LP |
3679 | r = unit_name_from_path(what, ".device", &e); |
3680 | if (r < 0) | |
3681 | return r; | |
6e2ef85b | 3682 | |
ac155bb8 | 3683 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3684 | if (r < 0) |
3685 | return r; | |
3686 | ||
ebc8968b FB |
3687 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3688 | dep = UNIT_BINDS_TO; | |
3689 | ||
9d06297e | 3690 | r = unit_add_two_dependencies(u, UNIT_AFTER, |
463d0d15 | 3691 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, |
eef85c4a | 3692 | device, true, mask); |
faa368e3 | 3693 | if (r < 0) |
6e2ef85b LP |
3694 | return r; |
3695 | ||
faa368e3 | 3696 | if (wants) { |
eef85c4a | 3697 | r = unit_add_dependency(device, UNIT_WANTS, u, false, mask); |
faa368e3 | 3698 | if (r < 0) |
6e2ef85b | 3699 | return r; |
faa368e3 | 3700 | } |
6e2ef85b LP |
3701 | |
3702 | return 0; | |
3703 | } | |
a16e1123 | 3704 | |
be847e82 | 3705 | int unit_coldplug(Unit *u) { |
05a98afd LP |
3706 | int r = 0, q; |
3707 | char **i; | |
cca098b0 LP |
3708 | |
3709 | assert(u); | |
3710 | ||
f0831ed2 | 3711 | /* Make sure we don't enter a loop, when coldplugging recursively. */ |
f78f265f LP |
3712 | if (u->coldplugged) |
3713 | return 0; | |
3714 | ||
3715 | u->coldplugged = true; | |
3716 | ||
05a98afd LP |
3717 | STRV_FOREACH(i, u->deserialized_refs) { |
3718 | q = bus_unit_track_add_name(u, *i); | |
3719 | if (q < 0 && r >= 0) | |
3720 | r = q; | |
3721 | } | |
3722 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 3723 | |
05a98afd LP |
3724 | if (UNIT_VTABLE(u)->coldplug) { |
3725 | q = UNIT_VTABLE(u)->coldplug(u); | |
3726 | if (q < 0 && r >= 0) | |
3727 | r = q; | |
3728 | } | |
5a6158b6 | 3729 | |
05a98afd LP |
3730 | if (u->job) { |
3731 | q = job_coldplug(u->job); | |
3732 | if (q < 0 && r >= 0) | |
3733 | r = q; | |
3734 | } | |
cca098b0 | 3735 | |
05a98afd | 3736 | return r; |
cca098b0 LP |
3737 | } |
3738 | ||
f0831ed2 LP |
3739 | void unit_catchup(Unit *u) { |
3740 | assert(u); | |
3741 | ||
3742 | if (UNIT_VTABLE(u)->catchup) | |
3743 | UNIT_VTABLE(u)->catchup(u); | |
3744 | } | |
3745 | ||
ba25d39e | 3746 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3747 | struct stat st; |
3748 | ||
3749 | if (!path) | |
3750 | return false; | |
3751 | ||
77969722 LP |
3752 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3753 | * are never out-of-date. */ | |
3754 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3755 | return false; | |
3756 | ||
21b95806 ZJS |
3757 | if (stat(path, &st) < 0) |
3758 | /* What, cannot access this anymore? */ | |
3759 | return true; | |
3760 | ||
ba25d39e ZJS |
3761 | if (path_masked) |
3762 | /* For masked files check if they are still so */ | |
3763 | return !null_or_empty(&st); | |
3764 | else | |
3a8db9fe | 3765 | /* For non-empty files check the mtime */ |
87ec20ef | 3766 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3767 | |
3768 | return false; | |
3769 | } | |
3770 | ||
45fb0699 | 3771 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
3772 | _cleanup_strv_free_ char **t = NULL; |
3773 | char **path; | |
1b64d026 | 3774 | |
45fb0699 LP |
3775 | assert(u); |
3776 | ||
ba25d39e ZJS |
3777 | /* For unit files, we allow masking… */ |
3778 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3779 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3780 | return true; |
5f4b19f4 | 3781 | |
ba25d39e ZJS |
3782 | /* Source paths should not be masked… */ |
3783 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3784 | return true; |
ae7a7182 | 3785 | |
19a44dfe LR |
3786 | if (u->load_state == UNIT_LOADED) |
3787 | (void) unit_find_dropin_paths(u, &t); | |
ab932a62 LP |
3788 | if (!strv_equal(u->dropin_paths, t)) |
3789 | return true; | |
6d10d308 | 3790 | |
ba25d39e | 3791 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3792 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3793 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3794 | return true; |
21b95806 | 3795 | |
ab932a62 | 3796 | return false; |
45fb0699 LP |
3797 | } |
3798 | ||
fdf20a31 | 3799 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3800 | assert(u); |
3801 | ||
fdf20a31 MM |
3802 | if (UNIT_VTABLE(u)->reset_failed) |
3803 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 LP |
3804 | |
3805 | RATELIMIT_RESET(u->start_limit); | |
3806 | u->start_limit_hit = false; | |
5632e374 LP |
3807 | } |
3808 | ||
a7f241db LP |
3809 | Unit *unit_following(Unit *u) { |
3810 | assert(u); | |
3811 | ||
3812 | if (UNIT_VTABLE(u)->following) | |
3813 | return UNIT_VTABLE(u)->following(u); | |
3814 | ||
3815 | return NULL; | |
3816 | } | |
3817 | ||
31afa0a4 | 3818 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3819 | assert(u); |
3820 | ||
31afa0a4 LP |
3821 | /* This call does check the current state of the unit. It's |
3822 | * hence useful to be called from state change calls of the | |
3823 | * unit itself, where the state isn't updated yet. This is | |
3824 | * different from unit_inactive_or_pending() which checks both | |
3825 | * the current state and for a queued job. */ | |
18ffdfda | 3826 | |
31afa0a4 LP |
3827 | return u->job && u->job->type == JOB_STOP; |
3828 | } | |
3829 | ||
3830 | bool unit_inactive_or_pending(Unit *u) { | |
3831 | assert(u); | |
3832 | ||
3833 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3834 | |
d956ac29 LP |
3835 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3836 | return true; | |
3837 | ||
31afa0a4 | 3838 | if (unit_stop_pending(u)) |
18ffdfda LP |
3839 | return true; |
3840 | ||
3841 | return false; | |
3842 | } | |
3843 | ||
31afa0a4 | 3844 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3845 | assert(u); |
3846 | ||
f60c2665 | 3847 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3848 | |
3849 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3850 | return true; | |
3851 | ||
ac155bb8 | 3852 | if (u->job && |
3742095b | 3853 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
3854 | return true; |
3855 | ||
3856 | return false; | |
3857 | } | |
3858 | ||
deb4e708 MK |
3859 | bool unit_will_restart(Unit *u) { |
3860 | assert(u); | |
3861 | ||
3862 | if (!UNIT_VTABLE(u)->will_restart) | |
3863 | return false; | |
3864 | ||
3865 | return UNIT_VTABLE(u)->will_restart(u); | |
3866 | } | |
3867 | ||
718db961 | 3868 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3869 | assert(u); |
3870 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 3871 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 3872 | |
8a0867d6 | 3873 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3874 | return -EOPNOTSUPP; |
8a0867d6 | 3875 | |
c74f17d9 | 3876 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3877 | } |
3878 | ||
82659fd7 | 3879 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
af4fa99d | 3880 | _cleanup_set_free_ Set *pid_set = NULL; |
82659fd7 LP |
3881 | int r; |
3882 | ||
d5099efc | 3883 | pid_set = set_new(NULL); |
82659fd7 LP |
3884 | if (!pid_set) |
3885 | return NULL; | |
3886 | ||
3887 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3888 | if (main_pid > 0) { | |
fea72cc0 | 3889 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 | 3890 | if (r < 0) |
95f14a3e | 3891 | return NULL; |
82659fd7 LP |
3892 | } |
3893 | ||
3894 | if (control_pid > 0) { | |
fea72cc0 | 3895 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 | 3896 | if (r < 0) |
95f14a3e | 3897 | return NULL; |
82659fd7 LP |
3898 | } |
3899 | ||
95f14a3e | 3900 | return TAKE_PTR(pid_set); |
82659fd7 LP |
3901 | } |
3902 | ||
d91c34f2 LP |
3903 | int unit_kill_common( |
3904 | Unit *u, | |
3905 | KillWho who, | |
3906 | int signo, | |
3907 | pid_t main_pid, | |
3908 | pid_t control_pid, | |
718db961 | 3909 | sd_bus_error *error) { |
d91c34f2 | 3910 | |
814cc562 | 3911 | int r = 0; |
ac5e3a50 | 3912 | bool killed = false; |
814cc562 | 3913 | |
ac5e3a50 | 3914 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3915 | if (main_pid < 0) |
7358dc02 | 3916 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 3917 | else if (main_pid == 0) |
7358dc02 | 3918 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3919 | } |
3920 | ||
ac5e3a50 | 3921 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3922 | if (control_pid < 0) |
7358dc02 | 3923 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 3924 | else if (control_pid == 0) |
7358dc02 | 3925 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3926 | } |
3927 | ||
ac5e3a50 JS |
3928 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3929 | if (control_pid > 0) { | |
814cc562 MS |
3930 | if (kill(control_pid, signo) < 0) |
3931 | r = -errno; | |
ac5e3a50 JS |
3932 | else |
3933 | killed = true; | |
3934 | } | |
814cc562 | 3935 | |
ac5e3a50 JS |
3936 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3937 | if (main_pid > 0) { | |
814cc562 MS |
3938 | if (kill(main_pid, signo) < 0) |
3939 | r = -errno; | |
ac5e3a50 JS |
3940 | else |
3941 | killed = true; | |
3942 | } | |
814cc562 | 3943 | |
ac5e3a50 | 3944 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3945 | _cleanup_set_free_ Set *pid_set = NULL; |
3946 | int q; | |
3947 | ||
82659fd7 LP |
3948 | /* Exclude the main/control pids from being killed via the cgroup */ |
3949 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3950 | if (!pid_set) |
3951 | return -ENOMEM; | |
3952 | ||
1d98fef1 | 3953 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, NULL, NULL); |
4c701096 | 3954 | if (q < 0 && !IN_SET(q, -EAGAIN, -ESRCH, -ENOENT)) |
814cc562 | 3955 | r = q; |
ac5e3a50 JS |
3956 | else |
3957 | killed = true; | |
814cc562 MS |
3958 | } |
3959 | ||
201f0c91 | 3960 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL)) |
ac5e3a50 JS |
3961 | return -ESRCH; |
3962 | ||
814cc562 MS |
3963 | return r; |
3964 | } | |
3965 | ||
6210e7fc LP |
3966 | int unit_following_set(Unit *u, Set **s) { |
3967 | assert(u); | |
3968 | assert(s); | |
3969 | ||
3970 | if (UNIT_VTABLE(u)->following_set) | |
3971 | return UNIT_VTABLE(u)->following_set(u, s); | |
3972 | ||
3973 | *s = NULL; | |
3974 | return 0; | |
3975 | } | |
3976 | ||
a4375746 | 3977 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
3978 | int r; |
3979 | ||
a4375746 LP |
3980 | assert(u); |
3981 | ||
0ec0deaa LP |
3982 | if (u->unit_file_state < 0 && u->fragment_path) { |
3983 | r = unit_file_get_state( | |
463d0d15 | 3984 | u->manager->unit_file_scope, |
0ec0deaa | 3985 | NULL, |
9ea3a0e7 | 3986 | u->id, |
0ec0deaa LP |
3987 | &u->unit_file_state); |
3988 | if (r < 0) | |
3989 | u->unit_file_state = UNIT_FILE_BAD; | |
3990 | } | |
a4375746 | 3991 | |
ac155bb8 | 3992 | return u->unit_file_state; |
a4375746 LP |
3993 | } |
3994 | ||
d2dc52db LP |
3995 | int unit_get_unit_file_preset(Unit *u) { |
3996 | assert(u); | |
3997 | ||
3998 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3999 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 4000 | u->manager->unit_file_scope, |
0ec0deaa LP |
4001 | NULL, |
4002 | basename(u->fragment_path)); | |
d2dc52db LP |
4003 | |
4004 | return u->unit_file_preset; | |
4005 | } | |
4006 | ||
7f7d01ed | 4007 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 4008 | assert(ref); |
7f7d01ed ZJS |
4009 | assert(source); |
4010 | assert(target); | |
57020a3a | 4011 | |
7f7d01ed | 4012 | if (ref->target) |
57020a3a LP |
4013 | unit_ref_unset(ref); |
4014 | ||
7f7d01ed ZJS |
4015 | ref->source = source; |
4016 | ref->target = target; | |
4017 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
4018 | return target; | |
57020a3a LP |
4019 | } |
4020 | ||
4021 | void unit_ref_unset(UnitRef *ref) { | |
4022 | assert(ref); | |
4023 | ||
7f7d01ed | 4024 | if (!ref->target) |
57020a3a LP |
4025 | return; |
4026 | ||
b75102e5 LP |
4027 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
4028 | * be unreferenced now. */ | |
7f7d01ed | 4029 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 4030 | |
7f7d01ed ZJS |
4031 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
4032 | ref->source = ref->target = NULL; | |
57020a3a LP |
4033 | } |
4034 | ||
29206d46 LP |
4035 | static int user_from_unit_name(Unit *u, char **ret) { |
4036 | ||
4037 | static const uint8_t hash_key[] = { | |
4038 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
4039 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
4040 | }; | |
4041 | ||
4042 | _cleanup_free_ char *n = NULL; | |
4043 | int r; | |
4044 | ||
4045 | r = unit_name_to_prefix(u->id, &n); | |
4046 | if (r < 0) | |
4047 | return r; | |
4048 | ||
4049 | if (valid_user_group_name(n)) { | |
ae2a15bc | 4050 | *ret = TAKE_PTR(n); |
29206d46 LP |
4051 | return 0; |
4052 | } | |
4053 | ||
4054 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
4055 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
4056 | return -ENOMEM; | |
4057 | ||
4058 | return 0; | |
4059 | } | |
4060 | ||
598459ce LP |
4061 | int unit_patch_contexts(Unit *u) { |
4062 | CGroupContext *cc; | |
4063 | ExecContext *ec; | |
cba6e062 LP |
4064 | unsigned i; |
4065 | int r; | |
4066 | ||
e06c73cc | 4067 | assert(u); |
e06c73cc | 4068 | |
598459ce LP |
4069 | /* Patch in the manager defaults into the exec and cgroup |
4070 | * contexts, _after_ the rest of the settings have been | |
4071 | * initialized */ | |
085afe36 | 4072 | |
598459ce LP |
4073 | ec = unit_get_exec_context(u); |
4074 | if (ec) { | |
4075 | /* This only copies in the ones that need memory */ | |
4076 | for (i = 0; i < _RLIMIT_MAX; i++) | |
4077 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
4078 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
4079 | if (!ec->rlimit[i]) | |
4080 | return -ENOMEM; | |
4081 | } | |
4082 | ||
463d0d15 | 4083 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4084 | !ec->working_directory) { |
4085 | ||
4086 | r = get_home_dir(&ec->working_directory); | |
4087 | if (r < 0) | |
4088 | return r; | |
4c08c824 LP |
4089 | |
4090 | /* Allow user services to run, even if the | |
4091 | * home directory is missing */ | |
4092 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4093 | } |
4094 | ||
598459ce | 4095 | if (ec->private_devices) |
2cd0a735 | 4096 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4097 | |
4098 | if (ec->protect_kernel_modules) | |
4099 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 LP |
4100 | |
4101 | if (ec->dynamic_user) { | |
4102 | if (!ec->user) { | |
4103 | r = user_from_unit_name(u, &ec->user); | |
4104 | if (r < 0) | |
4105 | return r; | |
4106 | } | |
4107 | ||
4108 | if (!ec->group) { | |
4109 | ec->group = strdup(ec->user); | |
4110 | if (!ec->group) | |
4111 | return -ENOMEM; | |
4112 | } | |
4113 | ||
63bb64a0 LP |
4114 | /* If the dynamic user option is on, let's make sure that the unit can't leave its UID/GID |
4115 | * around in the file system or on IPC objects. Hence enforce a strict sandbox. */ | |
4116 | ||
29206d46 | 4117 | ec->private_tmp = true; |
00d9ef85 | 4118 | ec->remove_ipc = true; |
63bb64a0 LP |
4119 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4120 | if (ec->protect_home == PROTECT_HOME_NO) | |
4121 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
29206d46 | 4122 | } |
cba6e062 LP |
4123 | } |
4124 | ||
598459ce | 4125 | cc = unit_get_cgroup_context(u); |
fe65e88b | 4126 | if (cc && ec) { |
f513e420 | 4127 | |
fe65e88b | 4128 | if (ec->private_devices && |
598459ce LP |
4129 | cc->device_policy == CGROUP_AUTO) |
4130 | cc->device_policy = CGROUP_CLOSED; | |
fe65e88b YW |
4131 | |
4132 | if (ec->root_image && | |
4133 | (cc->device_policy != CGROUP_AUTO || cc->device_allow)) { | |
4134 | ||
4135 | /* When RootImage= is specified, the following devices are touched. */ | |
4136 | r = cgroup_add_device_allow(cc, "/dev/loop-control", "rw"); | |
4137 | if (r < 0) | |
4138 | return r; | |
4139 | ||
4140 | r = cgroup_add_device_allow(cc, "block-loop", "rwm"); | |
4141 | if (r < 0) | |
4142 | return r; | |
4143 | ||
4144 | r = cgroup_add_device_allow(cc, "block-blkext", "rwm"); | |
4145 | if (r < 0) | |
4146 | return r; | |
4147 | } | |
598459ce | 4148 | } |
f1660f96 | 4149 | |
cba6e062 | 4150 | return 0; |
e06c73cc LP |
4151 | } |
4152 | ||
3ef63c31 LP |
4153 | ExecContext *unit_get_exec_context(Unit *u) { |
4154 | size_t offset; | |
4155 | assert(u); | |
4156 | ||
598459ce LP |
4157 | if (u->type < 0) |
4158 | return NULL; | |
4159 | ||
3ef63c31 LP |
4160 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4161 | if (offset <= 0) | |
4162 | return NULL; | |
4163 | ||
4164 | return (ExecContext*) ((uint8_t*) u + offset); | |
4165 | } | |
4166 | ||
718db961 LP |
4167 | KillContext *unit_get_kill_context(Unit *u) { |
4168 | size_t offset; | |
4169 | assert(u); | |
4170 | ||
598459ce LP |
4171 | if (u->type < 0) |
4172 | return NULL; | |
4173 | ||
718db961 LP |
4174 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4175 | if (offset <= 0) | |
4176 | return NULL; | |
4177 | ||
4178 | return (KillContext*) ((uint8_t*) u + offset); | |
4179 | } | |
4180 | ||
4ad49000 LP |
4181 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4182 | size_t offset; | |
4183 | ||
598459ce LP |
4184 | if (u->type < 0) |
4185 | return NULL; | |
4186 | ||
4ad49000 LP |
4187 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4188 | if (offset <= 0) | |
4189 | return NULL; | |
4190 | ||
4191 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4192 | } | |
4193 | ||
613b411c LP |
4194 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4195 | size_t offset; | |
4196 | ||
598459ce LP |
4197 | if (u->type < 0) |
4198 | return NULL; | |
4199 | ||
613b411c LP |
4200 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4201 | if (offset <= 0) | |
4202 | return NULL; | |
4203 | ||
4204 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4205 | } | |
4206 | ||
2e59b241 | 4207 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4208 | assert(u); |
4209 | ||
2e59b241 | 4210 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4211 | return NULL; |
4212 | ||
39591351 LP |
4213 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4214 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4215 | |
2e59b241 | 4216 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4217 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4218 | |
2e59b241 LP |
4219 | if (flags & UNIT_RUNTIME) |
4220 | return u->manager->lookup_paths.runtime_control; | |
4221 | ||
39591351 | 4222 | return NULL; |
71645aca LP |
4223 | } |
4224 | ||
2e59b241 LP |
4225 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4226 | char *ret = NULL; | |
4227 | ||
4228 | if (!s) | |
4229 | return NULL; | |
4230 | ||
4231 | /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated | |
4232 | * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is | |
4233 | * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly | |
4234 | * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is | |
4235 | * not specified, then the return value always needs to be freed. Callers can use this to optimize memory | |
4236 | * allocations. */ | |
4237 | ||
4238 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
4239 | ret = specifier_escape(s); | |
4240 | if (!ret) | |
4241 | return NULL; | |
4242 | ||
4243 | s = ret; | |
4244 | } | |
4245 | ||
4246 | if (flags & UNIT_ESCAPE_C) { | |
4247 | char *a; | |
4248 | ||
4249 | a = cescape(s); | |
4250 | free(ret); | |
4251 | if (!a) | |
4252 | return NULL; | |
4253 | ||
4254 | ret = a; | |
4255 | } | |
4256 | ||
4257 | if (buf) { | |
4258 | *buf = ret; | |
4259 | return ret ?: (char*) s; | |
4260 | } | |
4261 | ||
4262 | return ret ?: strdup(s); | |
4263 | } | |
4264 | ||
4265 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4266 | _cleanup_free_ char *result = NULL; | |
4267 | size_t n = 0, allocated = 0; | |
ae2a15bc | 4268 | char **i; |
2e59b241 LP |
4269 | |
4270 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a | |
4271 | * way suitable for ExecStart= stanzas */ | |
4272 | ||
4273 | STRV_FOREACH(i, l) { | |
4274 | _cleanup_free_ char *buf = NULL; | |
4275 | const char *p; | |
4276 | size_t a; | |
4277 | char *q; | |
4278 | ||
4279 | p = unit_escape_setting(*i, flags, &buf); | |
4280 | if (!p) | |
4281 | return NULL; | |
4282 | ||
4283 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
4284 | if (!GREEDY_REALLOC(result, allocated, n + a + 1)) | |
4285 | return NULL; | |
4286 | ||
4287 | q = result + n; | |
4288 | if (n > 0) | |
4289 | *(q++) = ' '; | |
4290 | ||
4291 | *(q++) = '"'; | |
4292 | q = stpcpy(q, p); | |
4293 | *(q++) = '"'; | |
4294 | ||
4295 | n += a; | |
4296 | } | |
4297 | ||
4298 | if (!GREEDY_REALLOC(result, allocated, n + 1)) | |
4299 | return NULL; | |
4300 | ||
4301 | result[n] = 0; | |
4302 | ||
ae2a15bc | 4303 | return TAKE_PTR(result); |
2e59b241 LP |
4304 | } |
4305 | ||
4306 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4307 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4308 | const char *dir, *wrapped; |
26d04f86 | 4309 | int r; |
71645aca LP |
4310 | |
4311 | assert(u); | |
2e59b241 LP |
4312 | assert(name); |
4313 | assert(data); | |
4314 | ||
4315 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4316 | return 0; | |
4317 | ||
4318 | data = unit_escape_setting(data, flags, &escaped); | |
4319 | if (!data) | |
4320 | return -ENOMEM; | |
4321 | ||
4322 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4323 | * previous section header is the same */ | |
4324 | ||
4325 | if (flags & UNIT_PRIVATE) { | |
4326 | if (!UNIT_VTABLE(u)->private_section) | |
4327 | return -EINVAL; | |
4328 | ||
4329 | if (!u->transient_file || u->last_section_private < 0) | |
4330 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4331 | else if (u->last_section_private == 0) | |
4332 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4333 | } else { | |
4334 | if (!u->transient_file || u->last_section_private < 0) | |
4335 | data = strjoina("[Unit]\n", data); | |
4336 | else if (u->last_section_private > 0) | |
4337 | data = strjoina("\n[Unit]\n", data); | |
4338 | } | |
71645aca | 4339 | |
4f4afc88 LP |
4340 | if (u->transient_file) { |
4341 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4342 | * write to the transient unit file. */ | |
4343 | fputs(data, u->transient_file); | |
4f4afc88 | 4344 | |
2e59b241 LP |
4345 | if (!endswith(data, "\n")) |
4346 | fputc('\n', u->transient_file); | |
4347 | ||
4348 | /* Remember which section we wrote this entry to */ | |
4349 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4350 | return 0; |
2e59b241 | 4351 | } |
8e2af478 | 4352 | |
2e59b241 | 4353 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4354 | if (!dir) |
4355 | return -EINVAL; | |
71645aca | 4356 | |
2a9a6f8a | 4357 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4358 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4359 | data, |
4360 | "\n"); | |
e20b2a86 | 4361 | |
815b09d3 | 4362 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4363 | if (r < 0) |
4364 | return r; | |
4365 | ||
45639f1b | 4366 | (void) mkdir_p_label(p, 0755); |
2a9a6f8a | 4367 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4368 | if (r < 0) |
4369 | return r; | |
4370 | ||
815b09d3 | 4371 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4372 | if (r < 0) |
4373 | return r; | |
815b09d3 | 4374 | q = NULL; |
adb76a70 | 4375 | |
adb76a70 WC |
4376 | strv_uniq(u->dropin_paths); |
4377 | ||
4378 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4379 | ||
4380 | return 0; | |
26d04f86 | 4381 | } |
71645aca | 4382 | |
2e59b241 | 4383 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4384 | _cleanup_free_ char *p = NULL; |
4385 | va_list ap; | |
4386 | int r; | |
4387 | ||
4388 | assert(u); | |
4389 | assert(name); | |
4390 | assert(format); | |
4391 | ||
2e59b241 | 4392 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4393 | return 0; |
4394 | ||
4395 | va_start(ap, format); | |
4396 | r = vasprintf(&p, format, ap); | |
4397 | va_end(ap); | |
4398 | ||
4399 | if (r < 0) | |
4400 | return -ENOMEM; | |
4401 | ||
2e59b241 | 4402 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4403 | } |
71645aca | 4404 | |
c2756a68 | 4405 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4406 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4407 | FILE *f; |
4f4afc88 | 4408 | |
c2756a68 LP |
4409 | assert(u); |
4410 | ||
3f5e8115 LP |
4411 | if (!UNIT_VTABLE(u)->can_transient) |
4412 | return -EOPNOTSUPP; | |
4413 | ||
45639f1b LP |
4414 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4415 | ||
605405c6 | 4416 | path = strjoin(u->manager->lookup_paths.transient, "/", u->id); |
4f4afc88 LP |
4417 | if (!path) |
4418 | return -ENOMEM; | |
4419 | ||
4420 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4421 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4422 | ||
78e334b5 | 4423 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 4424 | f = fopen(path, "we"); |
0126c8f3 | 4425 | if (!f) |
78e334b5 | 4426 | return -errno; |
4f4afc88 LP |
4427 | } |
4428 | ||
0126c8f3 | 4429 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4430 | u->transient_file = f; |
4431 | ||
0126c8f3 | 4432 | free_and_replace(u->fragment_path, path); |
7c65093a | 4433 | |
7c65093a LP |
4434 | u->source_path = mfree(u->source_path); |
4435 | u->dropin_paths = strv_free(u->dropin_paths); | |
4436 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4437 | ||
4f4afc88 LP |
4438 | u->load_state = UNIT_STUB; |
4439 | u->load_error = 0; | |
4440 | u->transient = true; | |
4441 | ||
7c65093a LP |
4442 | unit_add_to_dbus_queue(u); |
4443 | unit_add_to_gc_queue(u); | |
c2756a68 | 4444 | |
4f4afc88 LP |
4445 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4446 | u->transient_file); | |
4447 | ||
3f5e8115 | 4448 | return 0; |
c2756a68 LP |
4449 | } |
4450 | ||
c53d2d54 | 4451 | static int log_kill(pid_t pid, int sig, void *userdata) { |
1d98fef1 LP |
4452 | _cleanup_free_ char *comm = NULL; |
4453 | ||
4454 | (void) get_process_comm(pid, &comm); | |
4455 | ||
4456 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4457 | only, like for example systemd's own PAM stub process. */ | |
4458 | if (comm && comm[0] == '(') | |
c53d2d54 | 4459 | return 0; |
1d98fef1 LP |
4460 | |
4461 | log_unit_notice(userdata, | |
4462 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4463 | pid, | |
4464 | strna(comm), | |
4465 | signal_to_string(sig)); | |
c53d2d54 DB |
4466 | |
4467 | return 1; | |
1d98fef1 LP |
4468 | } |
4469 | ||
4470 | static int operation_to_signal(KillContext *c, KillOperation k) { | |
4471 | assert(c); | |
4472 | ||
4473 | switch (k) { | |
4474 | ||
4475 | case KILL_TERMINATE: | |
4476 | case KILL_TERMINATE_AND_LOG: | |
4477 | return c->kill_signal; | |
4478 | ||
4479 | case KILL_KILL: | |
fbb48d4c | 4480 | return c->final_kill_signal; |
1d98fef1 | 4481 | |
c87700a1 AZ |
4482 | case KILL_WATCHDOG: |
4483 | return c->watchdog_signal; | |
1d98fef1 LP |
4484 | |
4485 | default: | |
4486 | assert_not_reached("KillOperation unknown"); | |
4487 | } | |
4488 | } | |
4489 | ||
cd2086fe LP |
4490 | int unit_kill_context( |
4491 | Unit *u, | |
4492 | KillContext *c, | |
db2cb23b | 4493 | KillOperation k, |
cd2086fe LP |
4494 | pid_t main_pid, |
4495 | pid_t control_pid, | |
4496 | bool main_pid_alien) { | |
4497 | ||
1d98fef1 | 4498 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4499 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4500 | int sig, r; |
cd2086fe LP |
4501 | |
4502 | assert(u); | |
4503 | assert(c); | |
4504 | ||
59ec09a8 ZJS |
4505 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. |
4506 | * Returns > 0 if we killed something worth waiting for, 0 otherwise. */ | |
1d98fef1 | 4507 | |
cd2086fe LP |
4508 | if (c->kill_mode == KILL_NONE) |
4509 | return 0; | |
4510 | ||
1d98fef1 LP |
4511 | sig = operation_to_signal(c, k); |
4512 | ||
4513 | send_sighup = | |
4514 | c->send_sighup && | |
4515 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4516 | sig != SIGHUP; | |
4517 | ||
59ec09a8 ZJS |
4518 | if (k != KILL_TERMINATE || IN_SET(sig, SIGKILL, SIGABRT)) |
4519 | log_func = log_kill; | |
cd2086fe LP |
4520 | |
4521 | if (main_pid > 0) { | |
1d98fef1 LP |
4522 | if (log_func) |
4523 | log_func(main_pid, sig, u); | |
cd2086fe | 4524 | |
1d98fef1 | 4525 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4526 | if (r < 0 && r != -ESRCH) { |
4527 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4528 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 4529 | |
b821a397 | 4530 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 4531 | } else { |
bc6aed7b LP |
4532 | if (!main_pid_alien) |
4533 | wait_for_exit = true; | |
82659fd7 | 4534 | |
1d98fef1 | 4535 | if (r != -ESRCH && send_sighup) |
d0667321 | 4536 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 4537 | } |
cd2086fe LP |
4538 | } |
4539 | ||
4540 | if (control_pid > 0) { | |
1d98fef1 LP |
4541 | if (log_func) |
4542 | log_func(control_pid, sig, u); | |
cd2086fe | 4543 | |
1d98fef1 | 4544 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4545 | if (r < 0 && r != -ESRCH) { |
4546 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4547 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 4548 | |
b821a397 | 4549 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 4550 | } else { |
cd2086fe | 4551 | wait_for_exit = true; |
82659fd7 | 4552 | |
1d98fef1 | 4553 | if (r != -ESRCH && send_sighup) |
d0667321 | 4554 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 4555 | } |
cd2086fe LP |
4556 | } |
4557 | ||
b821a397 LP |
4558 | if (u->cgroup_path && |
4559 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4560 | _cleanup_set_free_ Set *pid_set = NULL; |
4561 | ||
82659fd7 LP |
4562 | /* Exclude the main/control pids from being killed via the cgroup */ |
4563 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4564 | if (!pid_set) |
4565 | return -ENOMEM; | |
4566 | ||
1d98fef1 LP |
4567 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4568 | sig, | |
4569 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4570 | pid_set, | |
4571 | log_func, u); | |
cd2086fe | 4572 | if (r < 0) { |
4c701096 | 4573 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
b821a397 LP |
4574 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
4575 | ||
82659fd7 | 4576 | } else if (r > 0) { |
bc6aed7b | 4577 | |
1d9cc876 LP |
4578 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4579 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
4580 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
4581 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
4582 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
4583 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 4584 | |
c22800e4 | 4585 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 4586 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 4587 | wait_for_exit = true; |
58ea275a | 4588 | |
1d98fef1 | 4589 | if (send_sighup) { |
82659fd7 LP |
4590 | set_free(pid_set); |
4591 | ||
4592 | pid_set = unit_pid_set(main_pid, control_pid); | |
4593 | if (!pid_set) | |
4594 | return -ENOMEM; | |
4595 | ||
1d98fef1 LP |
4596 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4597 | SIGHUP, | |
4598 | CGROUP_IGNORE_SELF, | |
4599 | pid_set, | |
4600 | NULL, NULL); | |
82659fd7 LP |
4601 | } |
4602 | } | |
cd2086fe LP |
4603 | } |
4604 | ||
4605 | return wait_for_exit; | |
4606 | } | |
4607 | ||
eef85c4a | 4608 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
ca8700e9 | 4609 | _cleanup_free_ char *p = NULL; |
eef85c4a | 4610 | UnitDependencyInfo di; |
a57f7e2c LP |
4611 | int r; |
4612 | ||
4613 | assert(u); | |
4614 | assert(path); | |
4615 | ||
eef85c4a LP |
4616 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in |
4617 | * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to | |
4618 | * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily | |
4619 | * determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4620 | |
70b64bd3 ZJS |
4621 | if (!path_is_absolute(path)) |
4622 | return -EINVAL; | |
4623 | ||
548f6937 | 4624 | r = hashmap_ensure_allocated(&u->requires_mounts_for, &path_hash_ops); |
eef85c4a LP |
4625 | if (r < 0) |
4626 | return r; | |
4627 | ||
a57f7e2c LP |
4628 | p = strdup(path); |
4629 | if (!p) | |
4630 | return -ENOMEM; | |
4631 | ||
106bf8e4 | 4632 | path = path_simplify(p, true); |
a57f7e2c | 4633 | |
ca8700e9 | 4634 | if (!path_is_normalized(path)) |
a57f7e2c | 4635 | return -EPERM; |
a57f7e2c | 4636 | |
ca8700e9 | 4637 | if (hashmap_contains(u->requires_mounts_for, path)) |
a57f7e2c | 4638 | return 0; |
a57f7e2c | 4639 | |
eef85c4a LP |
4640 | di = (UnitDependencyInfo) { |
4641 | .origin_mask = mask | |
4642 | }; | |
4643 | ||
ca8700e9 ZJS |
4644 | r = hashmap_put(u->requires_mounts_for, path, di.data); |
4645 | if (r < 0) | |
a57f7e2c | 4646 | return r; |
ca8700e9 | 4647 | p = NULL; |
a57f7e2c | 4648 | |
4cb06c59 | 4649 | char prefix[strlen(path) + 1]; |
ca8700e9 | 4650 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
a57f7e2c LP |
4651 | Set *x; |
4652 | ||
4653 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4654 | if (!x) { | |
ca8700e9 | 4655 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 4656 | |
548f6937 | 4657 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
742f41ad LP |
4658 | if (r < 0) |
4659 | return r; | |
a57f7e2c LP |
4660 | |
4661 | q = strdup(prefix); | |
4662 | if (!q) | |
4663 | return -ENOMEM; | |
4664 | ||
d5099efc | 4665 | x = set_new(NULL); |
ca8700e9 | 4666 | if (!x) |
a57f7e2c | 4667 | return -ENOMEM; |
a57f7e2c LP |
4668 | |
4669 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4670 | if (r < 0) { | |
a57f7e2c LP |
4671 | set_free(x); |
4672 | return r; | |
4673 | } | |
ca8700e9 | 4674 | q = NULL; |
a57f7e2c LP |
4675 | } |
4676 | ||
4677 | r = set_put(x, u); | |
4678 | if (r < 0) | |
4679 | return r; | |
4680 | } | |
4681 | ||
4682 | return 0; | |
4683 | } | |
4684 | ||
613b411c LP |
4685 | int unit_setup_exec_runtime(Unit *u) { |
4686 | ExecRuntime **rt; | |
4687 | size_t offset; | |
613b411c | 4688 | Unit *other; |
eef85c4a LP |
4689 | Iterator i; |
4690 | void *v; | |
e8a565cb | 4691 | int r; |
613b411c LP |
4692 | |
4693 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4694 | assert(offset > 0); | |
4695 | ||
06b643e7 | 4696 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
4697 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
4698 | if (*rt) | |
4699 | return 0; | |
4700 | ||
4701 | /* Try to get it from somebody else */ | |
eef85c4a | 4702 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { |
e8a565cb YW |
4703 | r = exec_runtime_acquire(u->manager, NULL, other->id, false, rt); |
4704 | if (r == 1) | |
4705 | return 1; | |
613b411c LP |
4706 | } |
4707 | ||
e8a565cb | 4708 | return exec_runtime_acquire(u->manager, unit_get_exec_context(u), u->id, true, rt); |
613b411c LP |
4709 | } |
4710 | ||
29206d46 LP |
4711 | int unit_setup_dynamic_creds(Unit *u) { |
4712 | ExecContext *ec; | |
4713 | DynamicCreds *dcreds; | |
4714 | size_t offset; | |
4715 | ||
4716 | assert(u); | |
4717 | ||
4718 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
4719 | assert(offset > 0); | |
4720 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
4721 | ||
4722 | ec = unit_get_exec_context(u); | |
4723 | assert(ec); | |
4724 | ||
4725 | if (!ec->dynamic_user) | |
4726 | return 0; | |
4727 | ||
4728 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
4729 | } | |
4730 | ||
1c2e9646 LP |
4731 | bool unit_type_supported(UnitType t) { |
4732 | if (_unlikely_(t < 0)) | |
4733 | return false; | |
4734 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
4735 | return false; | |
4736 | ||
4737 | if (!unit_vtable[t]->supported) | |
4738 | return true; | |
4739 | ||
4740 | return unit_vtable[t]->supported(); | |
4741 | } | |
4742 | ||
8b4305c7 LP |
4743 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
4744 | int r; | |
4745 | ||
4746 | assert(u); | |
4747 | assert(where); | |
4748 | ||
4749 | r = dir_is_empty(where); | |
3f602115 | 4750 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
4751 | return; |
4752 | if (r < 0) { | |
4753 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
4754 | return; | |
4755 | } | |
4756 | ||
4757 | log_struct(LOG_NOTICE, | |
2b044526 | 4758 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4759 | LOG_UNIT_ID(u), |
f1c50bec | 4760 | LOG_UNIT_INVOCATION_ID(u), |
8b4305c7 | 4761 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), |
a1230ff9 | 4762 | "WHERE=%s", where); |
8b4305c7 LP |
4763 | } |
4764 | ||
25cd4964 | 4765 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
58d9d89b | 4766 | _cleanup_free_ char *canonical_where = NULL; |
8b4305c7 LP |
4767 | int r; |
4768 | ||
4769 | assert(u); | |
4770 | assert(where); | |
4771 | ||
25cd4964 | 4772 | r = chase_symlinks(where, NULL, CHASE_NONEXISTENT, &canonical_where); |
8b4305c7 | 4773 | if (r < 0) { |
25cd4964 | 4774 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
4775 | return 0; |
4776 | } | |
25cd4964 AJ |
4777 | |
4778 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
4779 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
4780 | return 0; |
4781 | ||
25cd4964 | 4782 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
8b4305c7 | 4783 | log_struct(LOG_ERR, |
2b044526 | 4784 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4785 | LOG_UNIT_ID(u), |
f1c50bec | 4786 | LOG_UNIT_INVOCATION_ID(u), |
25cd4964 | 4787 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), |
a1230ff9 | 4788 | "WHERE=%s", where); |
8b4305c7 LP |
4789 | |
4790 | return -ELOOP; | |
4791 | } | |
0f13f3bd LP |
4792 | |
4793 | bool unit_is_pristine(Unit *u) { | |
4794 | assert(u); | |
4795 | ||
7c65093a | 4796 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
4797 | * in a number of different ways. Note that to cater for unit |
4798 | * types such as slice, we are generally fine with units that | |
e9e8cbc8 ZJS |
4799 | * are marked UNIT_LOADED even though nothing was actually |
4800 | * loaded, as those unit types don't require a file on disk. */ | |
0f13f3bd LP |
4801 | |
4802 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
4803 | u->fragment_path || | |
4804 | u->source_path || | |
4805 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
4806 | u->job || |
4807 | u->merged_into); | |
4808 | } | |
291d565a LP |
4809 | |
4810 | pid_t unit_control_pid(Unit *u) { | |
4811 | assert(u); | |
4812 | ||
4813 | if (UNIT_VTABLE(u)->control_pid) | |
4814 | return UNIT_VTABLE(u)->control_pid(u); | |
4815 | ||
4816 | return 0; | |
4817 | } | |
4818 | ||
4819 | pid_t unit_main_pid(Unit *u) { | |
4820 | assert(u); | |
4821 | ||
4822 | if (UNIT_VTABLE(u)->main_pid) | |
4823 | return UNIT_VTABLE(u)->main_pid(u); | |
4824 | ||
4825 | return 0; | |
4826 | } | |
00d9ef85 LP |
4827 | |
4828 | static void unit_unref_uid_internal( | |
4829 | Unit *u, | |
4830 | uid_t *ref_uid, | |
4831 | bool destroy_now, | |
4832 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
4833 | ||
4834 | assert(u); | |
4835 | assert(ref_uid); | |
4836 | assert(_manager_unref_uid); | |
4837 | ||
4838 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
4839 | * gid_t are actually the same time, with the same validity rules. | |
4840 | * | |
4841 | * Drops a reference to UID/GID from a unit. */ | |
4842 | ||
4843 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4844 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4845 | ||
4846 | if (!uid_is_valid(*ref_uid)) | |
4847 | return; | |
4848 | ||
4849 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
4850 | *ref_uid = UID_INVALID; | |
4851 | } | |
4852 | ||
4853 | void unit_unref_uid(Unit *u, bool destroy_now) { | |
4854 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); | |
4855 | } | |
4856 | ||
4857 | void unit_unref_gid(Unit *u, bool destroy_now) { | |
4858 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); | |
4859 | } | |
4860 | ||
4861 | static int unit_ref_uid_internal( | |
4862 | Unit *u, | |
4863 | uid_t *ref_uid, | |
4864 | uid_t uid, | |
4865 | bool clean_ipc, | |
4866 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
4867 | ||
4868 | int r; | |
4869 | ||
4870 | assert(u); | |
4871 | assert(ref_uid); | |
4872 | assert(uid_is_valid(uid)); | |
4873 | assert(_manager_ref_uid); | |
4874 | ||
4875 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
4876 | * are actually the same type, and have the same validity rules. | |
4877 | * | |
4878 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
4879 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
4880 | * drops to zero. */ | |
4881 | ||
4882 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4883 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4884 | ||
4885 | if (*ref_uid == uid) | |
4886 | return 0; | |
4887 | ||
4888 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
4889 | return -EBUSY; | |
4890 | ||
4891 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
4892 | if (r < 0) | |
4893 | return r; | |
4894 | ||
4895 | *ref_uid = uid; | |
4896 | return 1; | |
4897 | } | |
4898 | ||
4899 | int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { | |
4900 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); | |
4901 | } | |
4902 | ||
4903 | int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { | |
4904 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); | |
4905 | } | |
4906 | ||
4907 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
4908 | int r = 0, q = 0; | |
4909 | ||
4910 | assert(u); | |
4911 | ||
4912 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
4913 | ||
4914 | if (uid_is_valid(uid)) { | |
4915 | r = unit_ref_uid(u, uid, clean_ipc); | |
4916 | if (r < 0) | |
4917 | return r; | |
4918 | } | |
4919 | ||
4920 | if (gid_is_valid(gid)) { | |
4921 | q = unit_ref_gid(u, gid, clean_ipc); | |
4922 | if (q < 0) { | |
4923 | if (r > 0) | |
4924 | unit_unref_uid(u, false); | |
4925 | ||
4926 | return q; | |
4927 | } | |
4928 | } | |
4929 | ||
4930 | return r > 0 || q > 0; | |
4931 | } | |
4932 | ||
4933 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
4934 | ExecContext *c; | |
4935 | int r; | |
4936 | ||
4937 | assert(u); | |
4938 | ||
4939 | c = unit_get_exec_context(u); | |
4940 | ||
4941 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
4942 | if (r < 0) | |
4943 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
4944 | ||
4945 | return r; | |
4946 | } | |
4947 | ||
4948 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { | |
4949 | assert(u); | |
4950 | ||
4951 | unit_unref_uid(u, destroy_now); | |
4952 | unit_unref_gid(u, destroy_now); | |
4953 | } | |
4954 | ||
4955 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { | |
4956 | int r; | |
4957 | ||
4958 | assert(u); | |
4959 | ||
4960 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
4961 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
4962 | * objects when no service references the UID/GID anymore. */ | |
4963 | ||
4964 | r = unit_ref_uid_gid(u, uid, gid); | |
4965 | if (r > 0) | |
37d0b962 | 4966 | unit_add_to_dbus_queue(u); |
00d9ef85 | 4967 | } |
4b58153d LP |
4968 | |
4969 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { | |
4970 | int r; | |
4971 | ||
4972 | assert(u); | |
4973 | ||
4974 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
4975 | ||
4976 | if (sd_id128_equal(u->invocation_id, id)) | |
4977 | return 0; | |
4978 | ||
4979 | if (!sd_id128_is_null(u->invocation_id)) | |
4980 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
4981 | ||
4982 | if (sd_id128_is_null(id)) { | |
4983 | r = 0; | |
4984 | goto reset; | |
4985 | } | |
4986 | ||
4987 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
4988 | if (r < 0) | |
4989 | goto reset; | |
4990 | ||
4991 | u->invocation_id = id; | |
4992 | sd_id128_to_string(id, u->invocation_id_string); | |
4993 | ||
4994 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
4995 | if (r < 0) | |
4996 | goto reset; | |
4997 | ||
4998 | return 0; | |
4999 | ||
5000 | reset: | |
5001 | u->invocation_id = SD_ID128_NULL; | |
5002 | u->invocation_id_string[0] = 0; | |
5003 | return r; | |
5004 | } | |
5005 | ||
5006 | int unit_acquire_invocation_id(Unit *u) { | |
5007 | sd_id128_t id; | |
5008 | int r; | |
5009 | ||
5010 | assert(u); | |
5011 | ||
5012 | r = sd_id128_randomize(&id); | |
5013 | if (r < 0) | |
5014 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
5015 | ||
5016 | r = unit_set_invocation_id(u, id); | |
5017 | if (r < 0) | |
5018 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
5019 | ||
af92c603 | 5020 | unit_add_to_dbus_queue(u); |
4b58153d LP |
5021 | return 0; |
5022 | } | |
f0d47797 | 5023 | |
1ad6e8b3 LP |
5024 | int unit_set_exec_params(Unit *u, ExecParameters *p) { |
5025 | int r; | |
5026 | ||
7960b0c7 LP |
5027 | assert(u); |
5028 | assert(p); | |
f0d47797 | 5029 | |
004c7f16 | 5030 | /* Copy parameters from manager */ |
1ad6e8b3 LP |
5031 | r = manager_get_effective_environment(u->manager, &p->environment); |
5032 | if (r < 0) | |
5033 | return r; | |
5034 | ||
004c7f16 LP |
5035 | p->confirm_spawn = manager_get_confirm_spawn(u->manager); |
5036 | p->cgroup_supported = u->manager->cgroup_supported; | |
5037 | p->prefix = u->manager->prefix; | |
5038 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
5039 | ||
5040 | /* Copy paramaters from unit */ | |
7960b0c7 | 5041 | p->cgroup_path = u->cgroup_path; |
1d9cc876 | 5042 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
1ad6e8b3 LP |
5043 | |
5044 | return 0; | |
f0d47797 | 5045 | } |
a79279c7 | 5046 | |
4c253ed1 | 5047 | int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) { |
a79279c7 LP |
5048 | int r; |
5049 | ||
5050 | assert(u); | |
5051 | assert(ret); | |
5052 | ||
5053 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
5054 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
5055 | ||
5056 | (void) unit_realize_cgroup(u); | |
5057 | ||
4c253ed1 LP |
5058 | r = safe_fork(name, FORK_REOPEN_LOG, ret); |
5059 | if (r != 0) | |
5060 | return r; | |
a79279c7 | 5061 | |
4c253ed1 LP |
5062 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); |
5063 | (void) ignore_signals(SIGPIPE, -1); | |
a79279c7 | 5064 | |
4c253ed1 | 5065 | (void) prctl(PR_SET_PDEATHSIG, SIGTERM); |
a79279c7 | 5066 | |
4c253ed1 LP |
5067 | if (u->cgroup_path) { |
5068 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
5069 | if (r < 0) { | |
5070 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", u->cgroup_path); | |
5071 | _exit(EXIT_CGROUP); | |
a79279c7 | 5072 | } |
a79279c7 LP |
5073 | } |
5074 | ||
4c253ed1 | 5075 | return 0; |
a79279c7 | 5076 | } |
c999cf38 LP |
5077 | |
5078 | static void unit_update_dependency_mask(Unit *u, UnitDependency d, Unit *other, UnitDependencyInfo di) { | |
5079 | assert(u); | |
5080 | assert(d >= 0); | |
5081 | assert(d < _UNIT_DEPENDENCY_MAX); | |
5082 | assert(other); | |
5083 | ||
5084 | if (di.origin_mask == 0 && di.destination_mask == 0) { | |
5085 | /* No bit set anymore, let's drop the whole entry */ | |
5086 | assert_se(hashmap_remove(u->dependencies[d], other)); | |
5087 | log_unit_debug(u, "%s lost dependency %s=%s", u->id, unit_dependency_to_string(d), other->id); | |
5088 | } else | |
5089 | /* Mask was reduced, let's update the entry */ | |
5090 | assert_se(hashmap_update(u->dependencies[d], other, di.data) == 0); | |
5091 | } | |
5092 | ||
5093 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
5094 | UnitDependency d; | |
5095 | ||
5096 | assert(u); | |
5097 | ||
5098 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5099 | ||
5100 | if (mask == 0) | |
5101 | return; | |
5102 | ||
5103 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
5104 | bool done; | |
5105 | ||
5106 | do { | |
5107 | UnitDependencyInfo di; | |
5108 | Unit *other; | |
5109 | Iterator i; | |
5110 | ||
5111 | done = true; | |
5112 | ||
5113 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { | |
5114 | UnitDependency q; | |
5115 | ||
5116 | if ((di.origin_mask & ~mask) == di.origin_mask) | |
5117 | continue; | |
5118 | di.origin_mask &= ~mask; | |
5119 | unit_update_dependency_mask(u, d, other, di); | |
5120 | ||
5121 | /* We updated the dependency from our unit to the other unit now. But most dependencies | |
5122 | * imply a reverse dependency. Hence, let's delete that one too. For that we go through | |
5123 | * all dependency types on the other unit and delete all those which point to us and | |
5124 | * have the right mask set. */ | |
5125 | ||
5126 | for (q = 0; q < _UNIT_DEPENDENCY_MAX; q++) { | |
5127 | UnitDependencyInfo dj; | |
5128 | ||
5129 | dj.data = hashmap_get(other->dependencies[q], u); | |
5130 | if ((dj.destination_mask & ~mask) == dj.destination_mask) | |
5131 | continue; | |
5132 | dj.destination_mask &= ~mask; | |
5133 | ||
5134 | unit_update_dependency_mask(other, q, u, dj); | |
5135 | } | |
5136 | ||
5137 | unit_add_to_gc_queue(other); | |
5138 | ||
5139 | done = false; | |
5140 | break; | |
5141 | } | |
5142 | ||
5143 | } while (!done); | |
5144 | } | |
5145 | } | |
d3070fbd LP |
5146 | |
5147 | static int unit_export_invocation_id(Unit *u) { | |
5148 | const char *p; | |
5149 | int r; | |
5150 | ||
5151 | assert(u); | |
5152 | ||
5153 | if (u->exported_invocation_id) | |
5154 | return 0; | |
5155 | ||
5156 | if (sd_id128_is_null(u->invocation_id)) | |
5157 | return 0; | |
5158 | ||
5159 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
5160 | r = symlink_atomic(u->invocation_id_string, p); | |
5161 | if (r < 0) | |
5162 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5163 | ||
5164 | u->exported_invocation_id = true; | |
5165 | return 0; | |
5166 | } | |
5167 | ||
5168 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5169 | const char *p; | |
5170 | char buf[2]; | |
5171 | int r; | |
5172 | ||
5173 | assert(u); | |
5174 | assert(c); | |
5175 | ||
5176 | if (u->exported_log_level_max) | |
5177 | return 0; | |
5178 | ||
5179 | if (c->log_level_max < 0) | |
5180 | return 0; | |
5181 | ||
5182 | assert(c->log_level_max <= 7); | |
5183 | ||
5184 | buf[0] = '0' + c->log_level_max; | |
5185 | buf[1] = 0; | |
5186 | ||
5187 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5188 | r = symlink_atomic(buf, p); | |
5189 | if (r < 0) | |
5190 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5191 | ||
5192 | u->exported_log_level_max = true; | |
5193 | return 0; | |
5194 | } | |
5195 | ||
5196 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5197 | _cleanup_close_ int fd = -1; | |
5198 | struct iovec *iovec; | |
5199 | const char *p; | |
5200 | char *pattern; | |
5201 | le64_t *sizes; | |
5202 | ssize_t n; | |
5203 | size_t i; | |
5204 | int r; | |
5205 | ||
5206 | if (u->exported_log_extra_fields) | |
5207 | return 0; | |
5208 | ||
5209 | if (c->n_log_extra_fields <= 0) | |
5210 | return 0; | |
5211 | ||
5212 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5213 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5214 | ||
5215 | for (i = 0; i < c->n_log_extra_fields; i++) { | |
5216 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); | |
5217 | ||
5218 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5219 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5220 | } | |
5221 | ||
5222 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5223 | pattern = strjoina(p, ".XXXXXX"); | |
5224 | ||
5225 | fd = mkostemp_safe(pattern); | |
5226 | if (fd < 0) | |
5227 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5228 | ||
5229 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5230 | if (n < 0) { | |
5231 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5232 | goto fail; | |
5233 | } | |
5234 | ||
5235 | (void) fchmod(fd, 0644); | |
5236 | ||
5237 | if (rename(pattern, p) < 0) { | |
5238 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5239 | goto fail; | |
5240 | } | |
5241 | ||
5242 | u->exported_log_extra_fields = true; | |
5243 | return 0; | |
5244 | ||
5245 | fail: | |
5246 | (void) unlink(pattern); | |
5247 | return r; | |
5248 | } | |
5249 | ||
90fc172e AZ |
5250 | static int unit_export_log_rate_limit_interval(Unit *u, const ExecContext *c) { |
5251 | _cleanup_free_ char *buf = NULL; | |
5252 | const char *p; | |
5253 | int r; | |
5254 | ||
5255 | assert(u); | |
5256 | assert(c); | |
5257 | ||
5258 | if (u->exported_log_rate_limit_interval) | |
5259 | return 0; | |
5260 | ||
5261 | if (c->log_rate_limit_interval_usec == 0) | |
5262 | return 0; | |
5263 | ||
5264 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5265 | ||
5266 | if (asprintf(&buf, "%" PRIu64, c->log_rate_limit_interval_usec) < 0) | |
5267 | return log_oom(); | |
5268 | ||
5269 | r = symlink_atomic(buf, p); | |
5270 | if (r < 0) | |
5271 | return log_unit_debug_errno(u, r, "Failed to create log rate limit interval symlink %s: %m", p); | |
5272 | ||
5273 | u->exported_log_rate_limit_interval = true; | |
5274 | return 0; | |
5275 | } | |
5276 | ||
5277 | static int unit_export_log_rate_limit_burst(Unit *u, const ExecContext *c) { | |
5278 | _cleanup_free_ char *buf = NULL; | |
5279 | const char *p; | |
5280 | int r; | |
5281 | ||
5282 | assert(u); | |
5283 | assert(c); | |
5284 | ||
5285 | if (u->exported_log_rate_limit_burst) | |
5286 | return 0; | |
5287 | ||
5288 | if (c->log_rate_limit_burst == 0) | |
5289 | return 0; | |
5290 | ||
5291 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5292 | ||
5293 | if (asprintf(&buf, "%u", c->log_rate_limit_burst) < 0) | |
5294 | return log_oom(); | |
5295 | ||
5296 | r = symlink_atomic(buf, p); | |
5297 | if (r < 0) | |
5298 | return log_unit_debug_errno(u, r, "Failed to create log rate limit burst symlink %s: %m", p); | |
5299 | ||
5300 | u->exported_log_rate_limit_burst = true; | |
5301 | return 0; | |
5302 | } | |
5303 | ||
d3070fbd LP |
5304 | void unit_export_state_files(Unit *u) { |
5305 | const ExecContext *c; | |
5306 | ||
5307 | assert(u); | |
5308 | ||
5309 | if (!u->id) | |
5310 | return; | |
5311 | ||
5312 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5313 | return; | |
5314 | ||
638cece4 | 5315 | if (MANAGER_IS_TEST_RUN(u->manager)) |
8f632531 LP |
5316 | return; |
5317 | ||
d3070fbd LP |
5318 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5319 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5320 | * the IPC system itself and PID 1 also log to the journal. | |
5321 | * | |
5322 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5323 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5324 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5325 | * namespace at least. | |
5326 | * | |
5327 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5328 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5329 | * them with one. */ | |
5330 | ||
5331 | (void) unit_export_invocation_id(u); | |
5332 | ||
5333 | c = unit_get_exec_context(u); | |
5334 | if (c) { | |
5335 | (void) unit_export_log_level_max(u, c); | |
5336 | (void) unit_export_log_extra_fields(u, c); | |
90fc172e AZ |
5337 | (void) unit_export_log_rate_limit_interval(u, c); |
5338 | (void) unit_export_log_rate_limit_burst(u, c); | |
d3070fbd LP |
5339 | } |
5340 | } | |
5341 | ||
5342 | void unit_unlink_state_files(Unit *u) { | |
5343 | const char *p; | |
5344 | ||
5345 | assert(u); | |
5346 | ||
5347 | if (!u->id) | |
5348 | return; | |
5349 | ||
5350 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5351 | return; | |
5352 | ||
5353 | /* Undoes the effect of unit_export_state() */ | |
5354 | ||
5355 | if (u->exported_invocation_id) { | |
5356 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
5357 | (void) unlink(p); | |
5358 | ||
5359 | u->exported_invocation_id = false; | |
5360 | } | |
5361 | ||
5362 | if (u->exported_log_level_max) { | |
5363 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5364 | (void) unlink(p); | |
5365 | ||
5366 | u->exported_log_level_max = false; | |
5367 | } | |
5368 | ||
5369 | if (u->exported_log_extra_fields) { | |
5370 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5371 | (void) unlink(p); | |
5372 | ||
5373 | u->exported_log_extra_fields = false; | |
5374 | } | |
90fc172e AZ |
5375 | |
5376 | if (u->exported_log_rate_limit_interval) { | |
5377 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5378 | (void) unlink(p); | |
5379 | ||
5380 | u->exported_log_rate_limit_interval = false; | |
5381 | } | |
5382 | ||
5383 | if (u->exported_log_rate_limit_burst) { | |
5384 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5385 | (void) unlink(p); | |
5386 | ||
5387 | u->exported_log_rate_limit_burst = false; | |
5388 | } | |
d3070fbd | 5389 | } |
5afe510c | 5390 | |
3c7416b6 LP |
5391 | int unit_prepare_exec(Unit *u) { |
5392 | int r; | |
5393 | ||
5394 | assert(u); | |
5395 | ||
5396 | /* Prepares everything so that we can fork of a process for this unit */ | |
5397 | ||
5398 | (void) unit_realize_cgroup(u); | |
5399 | ||
5400 | if (u->reset_accounting) { | |
5401 | (void) unit_reset_cpu_accounting(u); | |
5402 | (void) unit_reset_ip_accounting(u); | |
5403 | u->reset_accounting = false; | |
5404 | } | |
5405 | ||
5406 | unit_export_state_files(u); | |
5407 | ||
5408 | r = unit_setup_exec_runtime(u); | |
5409 | if (r < 0) | |
5410 | return r; | |
5411 | ||
5412 | r = unit_setup_dynamic_creds(u); | |
5413 | if (r < 0) | |
5414 | return r; | |
5415 | ||
5416 | return 0; | |
5417 | } | |
5418 | ||
c53d2d54 | 5419 | static int log_leftover(pid_t pid, int sig, void *userdata) { |
a4634b21 LP |
5420 | _cleanup_free_ char *comm = NULL; |
5421 | ||
5422 | (void) get_process_comm(pid, &comm); | |
5423 | ||
5424 | if (comm && comm[0] == '(') /* Most likely our own helper process (PAM?), ignore */ | |
c53d2d54 | 5425 | return 0; |
a4634b21 LP |
5426 | |
5427 | log_unit_warning(userdata, | |
5428 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5429 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5430 | pid, strna(comm)); | |
c53d2d54 DB |
5431 | |
5432 | return 1; | |
a4634b21 LP |
5433 | } |
5434 | ||
c53d2d54 | 5435 | int unit_warn_leftover_processes(Unit *u) { |
a4634b21 LP |
5436 | assert(u); |
5437 | ||
5438 | (void) unit_pick_cgroup_path(u); | |
5439 | ||
5440 | if (!u->cgroup_path) | |
c53d2d54 | 5441 | return 0; |
a4634b21 | 5442 | |
c53d2d54 | 5443 | return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_leftover, u); |
a4634b21 LP |
5444 | } |
5445 | ||
bb2c7685 LP |
5446 | bool unit_needs_console(Unit *u) { |
5447 | ExecContext *ec; | |
5448 | UnitActiveState state; | |
5449 | ||
5450 | assert(u); | |
5451 | ||
5452 | state = unit_active_state(u); | |
5453 | ||
5454 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5455 | return false; | |
5456 | ||
5457 | if (UNIT_VTABLE(u)->needs_console) | |
5458 | return UNIT_VTABLE(u)->needs_console(u); | |
5459 | ||
5460 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5461 | ec = unit_get_exec_context(u); | |
5462 | if (!ec) | |
5463 | return false; | |
5464 | ||
5465 | return exec_context_may_touch_console(ec); | |
5466 | } | |
5467 | ||
81e9871e LP |
5468 | const char *unit_label_path(Unit *u) { |
5469 | const char *p; | |
5470 | ||
5471 | /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off | |
5472 | * when validating access checks. */ | |
5473 | ||
5474 | p = u->source_path ?: u->fragment_path; | |
5475 | if (!p) | |
5476 | return NULL; | |
5477 | ||
5478 | /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */ | |
5479 | if (path_equal(p, "/dev/null")) | |
5480 | return NULL; | |
5481 | ||
5482 | return p; | |
5483 | } | |
5484 | ||
6592b975 LP |
5485 | int unit_pid_attachable(Unit *u, pid_t pid, sd_bus_error *error) { |
5486 | int r; | |
5487 | ||
5488 | assert(u); | |
5489 | ||
5490 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5491 | * and not a kernel thread either */ | |
5492 | ||
5493 | /* First, a simple range check */ | |
5494 | if (!pid_is_valid(pid)) | |
5495 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier " PID_FMT " is not valid.", pid); | |
5496 | ||
5497 | /* Some extra safety check */ | |
5498 | if (pid == 1 || pid == getpid_cached()) | |
3fe91079 | 5499 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager process, refusing.", pid); |
6592b975 LP |
5500 | |
5501 | /* Don't even begin to bother with kernel threads */ | |
5502 | r = is_kernel_thread(pid); | |
5503 | if (r == -ESRCH) | |
5504 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid); | |
5505 | if (r < 0) | |
5506 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid); | |
5507 | if (r > 0) | |
5508 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid); | |
5509 | ||
5510 | return 0; | |
5511 | } | |
5512 | ||
523ee2d4 LP |
5513 | void unit_log_success(Unit *u) { |
5514 | assert(u); | |
5515 | ||
5516 | log_struct(LOG_INFO, | |
5517 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR, | |
5518 | LOG_UNIT_ID(u), | |
5519 | LOG_UNIT_INVOCATION_ID(u), | |
5520 | LOG_UNIT_MESSAGE(u, "Succeeded.")); | |
5521 | } | |
5522 | ||
7c047d74 LP |
5523 | void unit_log_failure(Unit *u, const char *result) { |
5524 | assert(u); | |
5525 | assert(result); | |
5526 | ||
5527 | log_struct(LOG_WARNING, | |
5528 | "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR, | |
5529 | LOG_UNIT_ID(u), | |
5530 | LOG_UNIT_INVOCATION_ID(u), | |
5531 | LOG_UNIT_MESSAGE(u, "Failed with result '%s'.", result), | |
5532 | "UNIT_RESULT=%s", result); | |
5533 | } | |
5534 | ||
91bbd9b7 LP |
5535 | void unit_log_process_exit( |
5536 | Unit *u, | |
5537 | int level, | |
5538 | const char *kind, | |
5539 | const char *command, | |
5540 | int code, | |
5541 | int status) { | |
5542 | ||
5543 | assert(u); | |
5544 | assert(kind); | |
5545 | ||
5546 | if (code != CLD_EXITED) | |
5547 | level = LOG_WARNING; | |
5548 | ||
5549 | log_struct(level, | |
5550 | "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR, | |
5551 | LOG_UNIT_MESSAGE(u, "%s exited, code=%s, status=%i/%s", | |
5552 | kind, | |
5553 | sigchld_code_to_string(code), status, | |
5554 | strna(code == CLD_EXITED | |
5555 | ? exit_status_to_string(status, EXIT_STATUS_FULL) | |
5556 | : signal_to_string(status))), | |
5557 | "EXIT_CODE=%s", sigchld_code_to_string(code), | |
5558 | "EXIT_STATUS=%i", status, | |
5559 | "COMMAND=%s", strna(command), | |
5560 | LOG_UNIT_ID(u), | |
5561 | LOG_UNIT_INVOCATION_ID(u)); | |
5562 | } | |
5563 | ||
7af67e9a LP |
5564 | int unit_exit_status(Unit *u) { |
5565 | assert(u); | |
5566 | ||
5567 | /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range | |
5568 | * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA | |
5569 | * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main | |
5570 | * service process has exited abnormally (signal/coredump). */ | |
5571 | ||
5572 | if (!UNIT_VTABLE(u)->exit_status) | |
5573 | return -EOPNOTSUPP; | |
5574 | ||
5575 | return UNIT_VTABLE(u)->exit_status(u); | |
5576 | } | |
5577 | ||
5578 | int unit_failure_action_exit_status(Unit *u) { | |
5579 | int r; | |
5580 | ||
5581 | assert(u); | |
5582 | ||
5583 | /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */ | |
5584 | ||
5585 | if (u->failure_action_exit_status >= 0) | |
5586 | return u->failure_action_exit_status; | |
5587 | ||
5588 | r = unit_exit_status(u); | |
5589 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5590 | return 255; | |
5591 | ||
5592 | return r; | |
5593 | } | |
5594 | ||
5595 | int unit_success_action_exit_status(Unit *u) { | |
5596 | int r; | |
5597 | ||
5598 | assert(u); | |
5599 | ||
5600 | /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */ | |
5601 | ||
5602 | if (u->success_action_exit_status >= 0) | |
5603 | return u->success_action_exit_status; | |
5604 | ||
5605 | r = unit_exit_status(u); | |
5606 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5607 | return 255; | |
5608 | ||
5609 | return r; | |
5610 | } | |
5611 | ||
a4191c9f LP |
5612 | int unit_test_trigger_loaded(Unit *u) { |
5613 | Unit *trigger; | |
5614 | ||
5615 | /* Tests whether the unit to trigger is loaded */ | |
5616 | ||
5617 | trigger = UNIT_TRIGGER(u); | |
5618 | if (!trigger) | |
5619 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), "Refusing to start, unit to trigger not loaded."); | |
5620 | if (trigger->load_state != UNIT_LOADED) | |
5621 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), "Refusing to start, unit %s to trigger not loaded.", u->id); | |
5622 | ||
5623 | return 0; | |
5624 | } | |
5625 | ||
5afe510c LP |
5626 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
5627 | [COLLECT_INACTIVE] = "inactive", | |
5628 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
5629 | }; | |
5630 | ||
5631 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); |