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Commit | Line | Data |
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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 | |
b5efdb8a | 13 | #include "alloc-util.h" |
57b7a260 | 14 | #include "all-units.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" |
f97b34a6 | 25 | #include "format-util.h" |
d3070fbd | 26 | #include "fs-util.h" |
4b58153d | 27 | #include "id128-util.h" |
915b1d01 | 28 | #include "io-util.h" |
4f5dd394 LP |
29 | #include "load-dropin.h" |
30 | #include "load-fragment.h" | |
31 | #include "log.h" | |
32 | #include "macro.h" | |
33 | #include "missing.h" | |
34 | #include "mkdir.h" | |
6bedfcbb | 35 | #include "parse-util.h" |
4f5dd394 | 36 | #include "path-util.h" |
0b452006 | 37 | #include "process-util.h" |
4f5dd394 | 38 | #include "set.h" |
6eb7c172 | 39 | #include "signal-util.h" |
d3070fbd | 40 | #include "sparse-endian.h" |
e9db43d5 | 41 | #include "special.h" |
2e59b241 | 42 | #include "specifier.h" |
8fcde012 | 43 | #include "stat-util.h" |
d054f0a4 | 44 | #include "stdio-util.h" |
5afe510c | 45 | #include "string-table.h" |
07630cea | 46 | #include "string-util.h" |
4f5dd394 | 47 | #include "strv.h" |
4f4afc88 | 48 | #include "umask-util.h" |
4f5dd394 | 49 | #include "unit-name.h" |
e9db43d5 | 50 | #include "unit.h" |
b1d4f8e1 LP |
51 | #include "user-util.h" |
52 | #include "virt.h" | |
87f0e418 LP |
53 | |
54 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
55 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 LP |
56 | [UNIT_SOCKET] = &socket_vtable, |
57 | [UNIT_TARGET] = &target_vtable, | |
58 | [UNIT_DEVICE] = &device_vtable, | |
59 | [UNIT_MOUNT] = &mount_vtable, | |
60 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 61 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 62 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 63 | [UNIT_PATH] = &path_vtable, |
6c12b52e | 64 | [UNIT_SLICE] = &slice_vtable, |
5afe510c | 65 | [UNIT_SCOPE] = &scope_vtable, |
87f0e418 LP |
66 | }; |
67 | ||
f2341e0a | 68 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 69 | |
7d17cfbc | 70 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
71 | Unit *u; |
72 | ||
73 | assert(m); | |
ac155bb8 | 74 | assert(size >= sizeof(Unit)); |
87f0e418 | 75 | |
7d17cfbc MS |
76 | u = malloc0(size); |
77 | if (!u) | |
87f0e418 LP |
78 | return NULL; |
79 | ||
d5099efc | 80 | u->names = set_new(&string_hash_ops); |
6b430fdb ZJS |
81 | if (!u->names) |
82 | return mfree(u); | |
87f0e418 | 83 | |
ac155bb8 MS |
84 | u->manager = m; |
85 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
86 | u->default_dependencies = true; |
87 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 88 | u->unit_file_preset = -1; |
d420282b | 89 | u->on_failure_job_mode = JOB_REPLACE; |
efdb0237 | 90 | u->cgroup_inotify_wd = -1; |
36c16a7c | 91 | u->job_timeout = USEC_INFINITY; |
a2df3ea4 | 92 | u->job_running_timeout = USEC_INFINITY; |
00d9ef85 LP |
93 | u->ref_uid = UID_INVALID; |
94 | u->ref_gid = GID_INVALID; | |
fe700f46 | 95 | u->cpu_usage_last = NSEC_INFINITY; |
17f14955 | 96 | u->cgroup_invalidated_mask |= CGROUP_MASK_BPF_FIREWALL; |
87f0e418 | 97 | |
6a48d82f DM |
98 | u->ip_accounting_ingress_map_fd = -1; |
99 | u->ip_accounting_egress_map_fd = -1; | |
100 | u->ipv4_allow_map_fd = -1; | |
101 | u->ipv6_allow_map_fd = -1; | |
102 | u->ipv4_deny_map_fd = -1; | |
103 | u->ipv6_deny_map_fd = -1; | |
104 | ||
2e59b241 LP |
105 | u->last_section_private = -1; |
106 | ||
6bf0f408 | 107 | RATELIMIT_INIT(u->start_limit, m->default_start_limit_interval, m->default_start_limit_burst); |
67bfdc97 | 108 | RATELIMIT_INIT(u->auto_stop_ratelimit, 10 * USEC_PER_SEC, 16); |
bea355da | 109 | |
87f0e418 LP |
110 | return u; |
111 | } | |
112 | ||
a581e45a | 113 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
dc409696 | 114 | _cleanup_(unit_freep) Unit *u = NULL; |
a581e45a LP |
115 | int r; |
116 | ||
117 | u = unit_new(m, size); | |
118 | if (!u) | |
119 | return -ENOMEM; | |
120 | ||
121 | r = unit_add_name(u, name); | |
dc409696 | 122 | if (r < 0) |
a581e45a | 123 | return r; |
a581e45a | 124 | |
1cc6c93a YW |
125 | *ret = TAKE_PTR(u); |
126 | ||
a581e45a LP |
127 | return r; |
128 | } | |
129 | ||
f278026d LP |
130 | bool unit_has_name(Unit *u, const char *name) { |
131 | assert(u); | |
132 | assert(name); | |
133 | ||
390bc2b1 | 134 | return set_contains(u->names, (char*) name); |
f278026d LP |
135 | } |
136 | ||
598459ce LP |
137 | static void unit_init(Unit *u) { |
138 | CGroupContext *cc; | |
139 | ExecContext *ec; | |
140 | KillContext *kc; | |
141 | ||
142 | assert(u); | |
143 | assert(u->manager); | |
144 | assert(u->type >= 0); | |
145 | ||
146 | cc = unit_get_cgroup_context(u); | |
147 | if (cc) { | |
148 | cgroup_context_init(cc); | |
149 | ||
150 | /* Copy in the manager defaults into the cgroup | |
151 | * context, _before_ the rest of the settings have | |
152 | * been initialized */ | |
153 | ||
154 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
13c31542 | 155 | cc->io_accounting = u->manager->default_io_accounting; |
377bfd2d | 156 | cc->ip_accounting = u->manager->default_ip_accounting; |
598459ce LP |
157 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
158 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 159 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
6a48d82f | 160 | cc->ip_accounting = u->manager->default_ip_accounting; |
0af20ea2 LP |
161 | |
162 | if (u->type != UNIT_SLICE) | |
163 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
164 | } |
165 | ||
166 | ec = unit_get_exec_context(u); | |
b1edf445 | 167 | if (ec) { |
598459ce LP |
168 | exec_context_init(ec); |
169 | ||
b1edf445 | 170 | ec->keyring_mode = MANAGER_IS_SYSTEM(u->manager) ? |
00f5ad93 | 171 | EXEC_KEYRING_SHARED : EXEC_KEYRING_INHERIT; |
b1edf445 LP |
172 | } |
173 | ||
598459ce LP |
174 | kc = unit_get_kill_context(u); |
175 | if (kc) | |
176 | kill_context_init(kc); | |
177 | ||
178 | if (UNIT_VTABLE(u)->init) | |
179 | UNIT_VTABLE(u)->init(u); | |
180 | } | |
181 | ||
87f0e418 | 182 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 183 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 184 | UnitType t; |
87f0e418 LP |
185 | int r; |
186 | ||
187 | assert(u); | |
188 | assert(text); | |
189 | ||
7410616c | 190 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 191 | |
ac155bb8 | 192 | if (!u->instance) |
9e2f7c11 | 193 | return -EINVAL; |
87f0e418 | 194 | |
7410616c LP |
195 | r = unit_name_replace_instance(text, u->instance, &s); |
196 | if (r < 0) | |
197 | return r; | |
198 | } else { | |
9e2f7c11 | 199 | s = strdup(text); |
7410616c LP |
200 | if (!s) |
201 | return -ENOMEM; | |
202 | } | |
87f0e418 | 203 | |
7410616c LP |
204 | if (set_contains(u->names, s)) |
205 | return 0; | |
206 | if (hashmap_contains(u->manager->units, s)) | |
207 | return -EEXIST; | |
208 | ||
209 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 210 | return -EINVAL; |
e537352b | 211 | |
7410616c LP |
212 | t = unit_name_to_type(s); |
213 | if (t < 0) | |
214 | return -EINVAL; | |
87f0e418 | 215 | |
598459ce LP |
216 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
217 | return -EINVAL; | |
87f0e418 | 218 | |
e48614c4 ZJS |
219 | r = unit_name_to_instance(s, &i); |
220 | if (r < 0) | |
598459ce | 221 | return r; |
87f0e418 | 222 | |
ce99c68a | 223 | if (i && !unit_type_may_template(t)) |
598459ce | 224 | return -EINVAL; |
9e2f7c11 | 225 | |
276c3e78 | 226 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
227 | * but not both. Note that we do allow names with different |
228 | * instance names however! */ | |
598459ce LP |
229 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
230 | return -EINVAL; | |
9e2f7c11 | 231 | |
8a993b61 | 232 | if (!unit_type_may_alias(t) && !set_isempty(u->names)) |
598459ce | 233 | return -EEXIST; |
9e2f7c11 | 234 | |
598459ce LP |
235 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
236 | return -E2BIG; | |
4f0f902f | 237 | |
e48614c4 | 238 | r = set_put(u->names, s); |
7410616c | 239 | if (r < 0) |
598459ce | 240 | return r; |
7410616c | 241 | assert(r > 0); |
87f0e418 | 242 | |
e48614c4 ZJS |
243 | r = hashmap_put(u->manager->units, s, u); |
244 | if (r < 0) { | |
7410616c | 245 | (void) set_remove(u->names, s); |
598459ce | 246 | return r; |
87f0e418 LP |
247 | } |
248 | ||
ac155bb8 | 249 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
250 | u->type = t; |
251 | u->id = s; | |
1cc6c93a | 252 | u->instance = TAKE_PTR(i); |
9e2f7c11 | 253 | |
71fda00f | 254 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 255 | |
598459ce | 256 | unit_init(u); |
598459ce | 257 | } |
9e2f7c11 | 258 | |
598459ce | 259 | s = NULL; |
9e2f7c11 | 260 | |
598459ce LP |
261 | unit_add_to_dbus_queue(u); |
262 | return 0; | |
87f0e418 LP |
263 | } |
264 | ||
0ae97ec1 | 265 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 266 | _cleanup_free_ char *t = NULL; |
598459ce | 267 | char *s, *i; |
276c3e78 | 268 | int r; |
0ae97ec1 LP |
269 | |
270 | assert(u); | |
271 | assert(name); | |
272 | ||
7410616c | 273 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 274 | |
ac155bb8 | 275 | if (!u->instance) |
9e2f7c11 LP |
276 | return -EINVAL; |
277 | ||
7410616c LP |
278 | r = unit_name_replace_instance(name, u->instance, &t); |
279 | if (r < 0) | |
280 | return r; | |
9e2f7c11 LP |
281 | |
282 | name = t; | |
283 | } | |
284 | ||
0ae97ec1 | 285 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 286 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 287 | if (!s) |
0ae97ec1 LP |
288 | return -ENOENT; |
289 | ||
7410616c | 290 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
291 | r = unit_name_to_instance(s, &i); |
292 | if (r < 0) | |
276c3e78 LP |
293 | return r; |
294 | ||
ac155bb8 | 295 | u->id = s; |
276c3e78 | 296 | |
ac155bb8 MS |
297 | free(u->instance); |
298 | u->instance = i; | |
276c3e78 | 299 | |
c1e1601e | 300 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 301 | |
0ae97ec1 LP |
302 | return 0; |
303 | } | |
304 | ||
f50e0a01 | 305 | int unit_set_description(Unit *u, const char *description) { |
84b26d51 | 306 | int r; |
f50e0a01 LP |
307 | |
308 | assert(u); | |
309 | ||
84b26d51 LP |
310 | r = free_and_strdup(&u->description, empty_to_null(description)); |
311 | if (r < 0) | |
312 | return r; | |
313 | if (r > 0) | |
314 | unit_add_to_dbus_queue(u); | |
c1e1601e | 315 | |
f50e0a01 LP |
316 | return 0; |
317 | } | |
318 | ||
f2f725e5 | 319 | bool unit_may_gc(Unit *u) { |
a354329f | 320 | UnitActiveState state; |
e98b2fbb | 321 | int r; |
5afe510c | 322 | |
701cc384 LP |
323 | assert(u); |
324 | ||
f2f725e5 ZJS |
325 | /* Checks whether the unit is ready to be unloaded for garbage collection. |
326 | * Returns true when the unit may be collected, and false if there's some | |
2641f02e ZJS |
327 | * reason to keep it loaded. |
328 | * | |
329 | * References from other units are *not* checked here. Instead, this is done | |
330 | * in unit_gc_sweep(), but using markers to properly collect dependency loops. | |
331 | */ | |
5afe510c | 332 | |
a354329f | 333 | if (u->job) |
f2f725e5 | 334 | return false; |
701cc384 | 335 | |
a354329f | 336 | if (u->nop_job) |
f2f725e5 | 337 | return false; |
6c073082 | 338 | |
a354329f LP |
339 | state = unit_active_state(u); |
340 | ||
7eb2a8a1 | 341 | /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */ |
a354329f LP |
342 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && |
343 | UNIT_VTABLE(u)->release_resources) | |
7eb2a8a1 | 344 | UNIT_VTABLE(u)->release_resources(u); |
a354329f | 345 | |
f5869324 | 346 | if (u->perpetual) |
f2f725e5 | 347 | return false; |
9d576438 | 348 | |
05a98afd | 349 | if (sd_bus_track_count(u->bus_track) > 0) |
f2f725e5 | 350 | return false; |
05a98afd | 351 | |
5afe510c LP |
352 | /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */ |
353 | switch (u->collect_mode) { | |
354 | ||
355 | case COLLECT_INACTIVE: | |
356 | if (state != UNIT_INACTIVE) | |
f2f725e5 | 357 | return false; |
5afe510c LP |
358 | |
359 | break; | |
360 | ||
361 | case COLLECT_INACTIVE_OR_FAILED: | |
362 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
f2f725e5 | 363 | return false; |
5afe510c LP |
364 | |
365 | break; | |
366 | ||
367 | default: | |
368 | assert_not_reached("Unknown garbage collection mode"); | |
369 | } | |
370 | ||
e98b2fbb LP |
371 | if (u->cgroup_path) { |
372 | /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay | |
373 | * around. Units with active processes should never be collected. */ | |
374 | ||
375 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
376 | if (r < 0) | |
377 | log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", u->cgroup_path); | |
378 | if (r <= 0) | |
f2f725e5 | 379 | return false; |
e98b2fbb LP |
380 | } |
381 | ||
f2f725e5 ZJS |
382 | if (UNIT_VTABLE(u)->may_gc && !UNIT_VTABLE(u)->may_gc(u)) |
383 | return false; | |
701cc384 | 384 | |
f2f725e5 | 385 | return true; |
701cc384 LP |
386 | } |
387 | ||
87f0e418 LP |
388 | void unit_add_to_load_queue(Unit *u) { |
389 | assert(u); | |
ac155bb8 | 390 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 391 | |
ac155bb8 | 392 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
393 | return; |
394 | ||
71fda00f | 395 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 396 | u->in_load_queue = true; |
87f0e418 LP |
397 | } |
398 | ||
23a177ef LP |
399 | void unit_add_to_cleanup_queue(Unit *u) { |
400 | assert(u); | |
401 | ||
ac155bb8 | 402 | if (u->in_cleanup_queue) |
23a177ef LP |
403 | return; |
404 | ||
71fda00f | 405 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 406 | u->in_cleanup_queue = true; |
23a177ef LP |
407 | } |
408 | ||
701cc384 LP |
409 | void unit_add_to_gc_queue(Unit *u) { |
410 | assert(u); | |
411 | ||
ac155bb8 | 412 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
413 | return; |
414 | ||
f2f725e5 | 415 | if (!unit_may_gc(u)) |
701cc384 LP |
416 | return; |
417 | ||
c5a97ed1 | 418 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 419 | u->in_gc_queue = true; |
701cc384 LP |
420 | } |
421 | ||
c1e1601e LP |
422 | void unit_add_to_dbus_queue(Unit *u) { |
423 | assert(u); | |
ac155bb8 | 424 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 425 | |
ac155bb8 | 426 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
427 | return; |
428 | ||
a567261a | 429 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 430 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 431 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 432 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 433 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
434 | return; |
435 | } | |
436 | ||
71fda00f | 437 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 438 | u->in_dbus_queue = true; |
c1e1601e LP |
439 | } |
440 | ||
fda09318 | 441 | void unit_submit_to_stop_when_unneeded_queue(Unit *u) { |
a3c1168a LP |
442 | assert(u); |
443 | ||
444 | if (u->in_stop_when_unneeded_queue) | |
445 | return; | |
446 | ||
447 | if (!u->stop_when_unneeded) | |
448 | return; | |
449 | ||
450 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
451 | return; | |
452 | ||
453 | LIST_PREPEND(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
454 | u->in_stop_when_unneeded_queue = true; | |
455 | } | |
456 | ||
eef85c4a | 457 | static void bidi_set_free(Unit *u, Hashmap *h) { |
87f0e418 | 458 | Unit *other; |
eef85c4a LP |
459 | Iterator i; |
460 | void *v; | |
87f0e418 LP |
461 | |
462 | assert(u); | |
463 | ||
eef85c4a | 464 | /* Frees the hashmap and makes sure we are dropped from the inverse pointers */ |
87f0e418 | 465 | |
eef85c4a | 466 | HASHMAP_FOREACH_KEY(v, other, h, i) { |
87f0e418 LP |
467 | UnitDependency d; |
468 | ||
469 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
eef85c4a | 470 | hashmap_remove(other->dependencies[d], u); |
701cc384 LP |
471 | |
472 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
473 | } |
474 | ||
eef85c4a | 475 | hashmap_free(h); |
87f0e418 LP |
476 | } |
477 | ||
c2756a68 LP |
478 | static void unit_remove_transient(Unit *u) { |
479 | char **i; | |
480 | ||
481 | assert(u); | |
482 | ||
483 | if (!u->transient) | |
484 | return; | |
485 | ||
486 | if (u->fragment_path) | |
3f5e8115 | 487 | (void) unlink(u->fragment_path); |
c2756a68 LP |
488 | |
489 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 490 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 491 | |
39591351 LP |
492 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
493 | if (!p) | |
494 | continue; | |
495 | ||
496 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
497 | if (!pp) | |
498 | continue; | |
499 | ||
500 | /* Only drop transient drop-ins */ | |
501 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
502 | continue; | |
c2756a68 | 503 | |
39591351 LP |
504 | (void) unlink(*i); |
505 | (void) rmdir(p); | |
c2756a68 LP |
506 | } |
507 | } | |
508 | ||
a57f7e2c | 509 | static void unit_free_requires_mounts_for(Unit *u) { |
eef85c4a | 510 | assert(u); |
a57f7e2c | 511 | |
eef85c4a LP |
512 | for (;;) { |
513 | _cleanup_free_ char *path; | |
a57f7e2c | 514 | |
eef85c4a LP |
515 | path = hashmap_steal_first_key(u->requires_mounts_for); |
516 | if (!path) | |
517 | break; | |
518 | else { | |
519 | char s[strlen(path) + 1]; | |
a57f7e2c | 520 | |
eef85c4a LP |
521 | PATH_FOREACH_PREFIX_MORE(s, path) { |
522 | char *y; | |
523 | Set *x; | |
524 | ||
525 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
526 | if (!x) | |
527 | continue; | |
a57f7e2c | 528 | |
eef85c4a | 529 | (void) set_remove(x, u); |
a57f7e2c | 530 | |
eef85c4a LP |
531 | if (set_isempty(x)) { |
532 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
533 | free(y); | |
534 | set_free(x); | |
535 | } | |
a57f7e2c LP |
536 | } |
537 | } | |
538 | } | |
539 | ||
eef85c4a | 540 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
a57f7e2c LP |
541 | } |
542 | ||
598459ce LP |
543 | static void unit_done(Unit *u) { |
544 | ExecContext *ec; | |
545 | CGroupContext *cc; | |
546 | ||
547 | assert(u); | |
548 | ||
549 | if (u->type < 0) | |
550 | return; | |
551 | ||
552 | if (UNIT_VTABLE(u)->done) | |
553 | UNIT_VTABLE(u)->done(u); | |
554 | ||
555 | ec = unit_get_exec_context(u); | |
556 | if (ec) | |
557 | exec_context_done(ec); | |
558 | ||
559 | cc = unit_get_cgroup_context(u); | |
560 | if (cc) | |
561 | cgroup_context_done(cc); | |
562 | } | |
563 | ||
87f0e418 LP |
564 | void unit_free(Unit *u) { |
565 | UnitDependency d; | |
566 | Iterator i; | |
567 | char *t; | |
568 | ||
c9d5c9c0 LP |
569 | if (!u) |
570 | return; | |
87f0e418 | 571 | |
50fb00b7 | 572 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 573 | |
2c289ea8 | 574 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
575 | unit_remove_transient(u); |
576 | ||
c1e1601e LP |
577 | bus_unit_send_removed_signal(u); |
578 | ||
598459ce | 579 | unit_done(u); |
a013b84b | 580 | |
50be4f4a | 581 | unit_dequeue_rewatch_pids(u); |
cf9fd508 | 582 | |
50be4f4a | 583 | sd_bus_slot_unref(u->match_bus_slot); |
05a98afd LP |
584 | sd_bus_track_unref(u->bus_track); |
585 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
586 | ||
a57f7e2c LP |
587 | unit_free_requires_mounts_for(u); |
588 | ||
ac155bb8 MS |
589 | SET_FOREACH(t, u->names, i) |
590 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 591 | |
4b58153d LP |
592 | if (!sd_id128_is_null(u->invocation_id)) |
593 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
594 | ||
97e7d748 MS |
595 | if (u->job) { |
596 | Job *j = u->job; | |
597 | job_uninstall(j); | |
598 | job_free(j); | |
599 | } | |
964e0949 | 600 | |
e0209d83 MS |
601 | if (u->nop_job) { |
602 | Job *j = u->nop_job; | |
603 | job_uninstall(j); | |
604 | job_free(j); | |
605 | } | |
606 | ||
964e0949 | 607 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 608 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 609 | |
adefcf28 LP |
610 | if (u->on_console) |
611 | manager_unref_console(u->manager); | |
612 | ||
efdb0237 | 613 | unit_release_cgroup(u); |
72673e86 | 614 | |
d3070fbd LP |
615 | if (!MANAGER_IS_RELOADING(u->manager)) |
616 | unit_unlink_state_files(u); | |
617 | ||
00d9ef85 LP |
618 | unit_unref_uid_gid(u, false); |
619 | ||
5269eb6b | 620 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 621 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 622 | |
a911bb9a LP |
623 | unit_unwatch_all_pids(u); |
624 | ||
702a2d8f | 625 | unit_ref_unset(&u->slice); |
7f7d01ed ZJS |
626 | while (u->refs_by_target) |
627 | unit_ref_unset(u->refs_by_target); | |
57020a3a | 628 | |
ac155bb8 | 629 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 630 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 631 | |
ac155bb8 | 632 | if (u->in_load_queue) |
71fda00f | 633 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 634 | |
ac155bb8 | 635 | if (u->in_dbus_queue) |
71fda00f | 636 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 637 | |
a2d72e26 | 638 | if (u->in_gc_queue) |
c5a97ed1 | 639 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 640 | |
91a6073e LP |
641 | if (u->in_cgroup_realize_queue) |
642 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 643 | |
09e24654 LP |
644 | if (u->in_cgroup_empty_queue) |
645 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
646 | ||
1bdf2790 ZJS |
647 | if (u->in_cleanup_queue) |
648 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
adefcf28 | 649 | |
19496554 MS |
650 | if (u->in_target_deps_queue) |
651 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
652 | ||
a3c1168a LP |
653 | if (u->in_stop_when_unneeded_queue) |
654 | LIST_REMOVE(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
655 | ||
6a48d82f DM |
656 | safe_close(u->ip_accounting_ingress_map_fd); |
657 | safe_close(u->ip_accounting_egress_map_fd); | |
72673e86 | 658 | |
6a48d82f DM |
659 | safe_close(u->ipv4_allow_map_fd); |
660 | safe_close(u->ipv6_allow_map_fd); | |
661 | safe_close(u->ipv4_deny_map_fd); | |
662 | safe_close(u->ipv6_deny_map_fd); | |
d3070fbd | 663 | |
6a48d82f | 664 | bpf_program_unref(u->ip_bpf_ingress); |
aa2b6f1d | 665 | bpf_program_unref(u->ip_bpf_ingress_installed); |
6a48d82f | 666 | bpf_program_unref(u->ip_bpf_egress); |
aa2b6f1d | 667 | bpf_program_unref(u->ip_bpf_egress_installed); |
00d9ef85 | 668 | |
084c7007 RG |
669 | bpf_program_unref(u->bpf_device_control_installed); |
670 | ||
a946fa9b ZJS |
671 | condition_free_list(u->conditions); |
672 | condition_free_list(u->asserts); | |
f755e3b7 | 673 | |
ac155bb8 | 674 | free(u->description); |
49dbfa7b | 675 | strv_free(u->documentation); |
ac155bb8 | 676 | free(u->fragment_path); |
1b64d026 | 677 | free(u->source_path); |
ae7a7182 | 678 | strv_free(u->dropin_paths); |
ac155bb8 | 679 | free(u->instance); |
87f0e418 | 680 | |
f189ab18 LP |
681 | free(u->job_timeout_reboot_arg); |
682 | ||
ac155bb8 | 683 | set_free_free(u->names); |
87f0e418 | 684 | |
6bf0f408 LP |
685 | free(u->reboot_arg); |
686 | ||
87f0e418 LP |
687 | free(u); |
688 | } | |
689 | ||
690 | UnitActiveState unit_active_state(Unit *u) { | |
691 | assert(u); | |
692 | ||
ac155bb8 | 693 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
694 | return unit_active_state(unit_follow_merge(u)); |
695 | ||
696 | /* After a reload it might happen that a unit is not correctly | |
697 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 698 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
699 | |
700 | return UNIT_VTABLE(u)->active_state(u); | |
701 | } | |
702 | ||
10a94420 LP |
703 | const char* unit_sub_state_to_string(Unit *u) { |
704 | assert(u); | |
705 | ||
706 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
707 | } | |
708 | ||
eef85c4a LP |
709 | static int set_complete_move(Set **s, Set **other) { |
710 | assert(s); | |
711 | assert(other); | |
712 | ||
713 | if (!other) | |
714 | return 0; | |
715 | ||
716 | if (*s) | |
717 | return set_move(*s, *other); | |
ae2a15bc LP |
718 | else |
719 | *s = TAKE_PTR(*other); | |
7c0b05e5 | 720 | |
eef85c4a LP |
721 | return 0; |
722 | } | |
723 | ||
724 | static int hashmap_complete_move(Hashmap **s, Hashmap **other) { | |
23a177ef LP |
725 | assert(s); |
726 | assert(other); | |
87f0e418 | 727 | |
23a177ef | 728 | if (!*other) |
7c0b05e5 | 729 | return 0; |
87f0e418 | 730 | |
eef85c4a LP |
731 | if (*s) |
732 | return hashmap_move(*s, *other); | |
ae2a15bc LP |
733 | else |
734 | *s = TAKE_PTR(*other); | |
7c0b05e5 MS |
735 | |
736 | return 0; | |
23a177ef | 737 | } |
87f0e418 | 738 | |
7c0b05e5 | 739 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
740 | char *t; |
741 | Iterator i; | |
7c0b05e5 | 742 | int r; |
87f0e418 | 743 | |
23a177ef LP |
744 | assert(u); |
745 | assert(other); | |
746 | ||
eef85c4a | 747 | r = set_complete_move(&u->names, &other->names); |
7c0b05e5 MS |
748 | if (r < 0) |
749 | return r; | |
23a177ef | 750 | |
ac155bb8 MS |
751 | set_free_free(other->names); |
752 | other->names = NULL; | |
753 | other->id = NULL; | |
23a177ef | 754 | |
ac155bb8 MS |
755 | SET_FOREACH(t, u->names, i) |
756 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
757 | |
758 | return 0; | |
87f0e418 LP |
759 | } |
760 | ||
09a65f92 MS |
761 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
762 | unsigned n_reserve; | |
763 | ||
764 | assert(u); | |
765 | assert(other); | |
766 | assert(d < _UNIT_DEPENDENCY_MAX); | |
767 | ||
768 | /* | |
769 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 770 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
771 | * as a whole to u by complete_move(). |
772 | */ | |
773 | if (!u->dependencies[d]) | |
774 | return 0; | |
775 | ||
776 | /* merge_dependencies() will skip a u-on-u dependency */ | |
eef85c4a | 777 | n_reserve = hashmap_size(other->dependencies[d]) - !!hashmap_get(other->dependencies[d], u); |
09a65f92 | 778 | |
eef85c4a | 779 | return hashmap_reserve(u->dependencies[d], n_reserve); |
09a65f92 MS |
780 | } |
781 | ||
d1fab3fe | 782 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
783 | Iterator i; |
784 | Unit *back; | |
eef85c4a | 785 | void *v; |
87f0e418 | 786 | int r; |
23a177ef | 787 | |
eef85c4a LP |
788 | /* Merges all dependencies of type 'd' of the unit 'other' into the deps of the unit 'u' */ |
789 | ||
23a177ef LP |
790 | assert(u); |
791 | assert(other); | |
792 | assert(d < _UNIT_DEPENDENCY_MAX); | |
793 | ||
eef85c4a LP |
794 | /* Fix backwards pointers. Let's iterate through all dependendent units of the other unit. */ |
795 | HASHMAP_FOREACH_KEY(v, back, other->dependencies[d], i) { | |
23a177ef LP |
796 | UnitDependency k; |
797 | ||
eef85c4a LP |
798 | /* Let's now iterate through the dependencies of that dependencies of the other units, looking for |
799 | * pointers back, and let's fix them up, to instead point to 'u'. */ | |
800 | ||
e48614c4 | 801 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff | 802 | if (back == u) { |
eef85c4a LP |
803 | /* Do not add dependencies between u and itself. */ |
804 | if (hashmap_remove(back->dependencies[k], other)) | |
f2341e0a | 805 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff | 806 | } else { |
eef85c4a LP |
807 | UnitDependencyInfo di_u, di_other, di_merged; |
808 | ||
809 | /* Let's drop this dependency between "back" and "other", and let's create it between | |
810 | * "back" and "u" instead. Let's merge the bit masks of the dependency we are moving, | |
811 | * and any such dependency which might already exist */ | |
812 | ||
813 | di_other.data = hashmap_get(back->dependencies[k], other); | |
814 | if (!di_other.data) | |
815 | continue; /* dependency isn't set, let's try the next one */ | |
816 | ||
817 | di_u.data = hashmap_get(back->dependencies[k], u); | |
818 | ||
819 | di_merged = (UnitDependencyInfo) { | |
820 | .origin_mask = di_u.origin_mask | di_other.origin_mask, | |
821 | .destination_mask = di_u.destination_mask | di_other.destination_mask, | |
822 | }; | |
823 | ||
824 | r = hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data); | |
825 | if (r < 0) | |
826 | log_warning_errno(r, "Failed to remove/replace: back=%s other=%s u=%s: %m", back->id, other_id, u->id); | |
827 | assert(r >= 0); | |
828 | ||
829 | /* assert_se(hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data) >= 0); */ | |
e66047ff | 830 | } |
e48614c4 | 831 | } |
eef85c4a | 832 | |
23a177ef LP |
833 | } |
834 | ||
e66047ff | 835 | /* Also do not move dependencies on u to itself */ |
eef85c4a | 836 | back = hashmap_remove(other->dependencies[d], u); |
d1fab3fe | 837 | if (back) |
f2341e0a | 838 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 839 | |
7c0b05e5 | 840 | /* The move cannot fail. The caller must have performed a reservation. */ |
eef85c4a | 841 | assert_se(hashmap_complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); |
23a177ef | 842 | |
eef85c4a | 843 | other->dependencies[d] = hashmap_free(other->dependencies[d]); |
23a177ef LP |
844 | } |
845 | ||
846 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 847 | UnitDependency d; |
d1fab3fe | 848 | const char *other_id = NULL; |
09a65f92 | 849 | int r; |
87f0e418 LP |
850 | |
851 | assert(u); | |
852 | assert(other); | |
ac155bb8 MS |
853 | assert(u->manager == other->manager); |
854 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 855 | |
cc916967 LP |
856 | other = unit_follow_merge(other); |
857 | ||
23a177ef LP |
858 | if (other == u) |
859 | return 0; | |
860 | ||
ac155bb8 | 861 | if (u->type != other->type) |
9e2f7c11 LP |
862 | return -EINVAL; |
863 | ||
ac155bb8 | 864 | if (!u->instance != !other->instance) |
87f0e418 LP |
865 | return -EINVAL; |
866 | ||
8a993b61 | 867 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
868 | return -EEXIST; |
869 | ||
ec2ce0c5 | 870 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 871 | return -EEXIST; |
87f0e418 | 872 | |
ac155bb8 | 873 | if (other->job) |
819e213f LP |
874 | return -EEXIST; |
875 | ||
e0209d83 MS |
876 | if (other->nop_job) |
877 | return -EEXIST; | |
878 | ||
fdf20a31 | 879 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
880 | return -EEXIST; |
881 | ||
d1fab3fe ZJS |
882 | if (other->id) |
883 | other_id = strdupa(other->id); | |
884 | ||
09a65f92 MS |
885 | /* Make reservations to ensure merge_dependencies() won't fail */ |
886 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
887 | r = reserve_dependencies(u, other, d); | |
888 | /* | |
889 | * We don't rollback reservations if we fail. We don't have | |
890 | * a way to undo reservations. A reservation is not a leak. | |
891 | */ | |
892 | if (r < 0) | |
893 | return r; | |
894 | } | |
895 | ||
87f0e418 | 896 | /* Merge names */ |
7c0b05e5 MS |
897 | r = merge_names(u, other); |
898 | if (r < 0) | |
899 | return r; | |
87f0e418 | 900 | |
57020a3a | 901 | /* Redirect all references */ |
7f7d01ed ZJS |
902 | while (other->refs_by_target) |
903 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
57020a3a | 904 | |
87f0e418 LP |
905 | /* Merge dependencies */ |
906 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 907 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 908 | |
ac155bb8 MS |
909 | other->load_state = UNIT_MERGED; |
910 | other->merged_into = u; | |
23a177ef | 911 | |
3616a49c LP |
912 | /* If there is still some data attached to the other node, we |
913 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 914 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
915 | if (UNIT_VTABLE(other)->done) |
916 | UNIT_VTABLE(other)->done(other); | |
917 | ||
918 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
919 | unit_add_to_cleanup_queue(other); |
920 | ||
921 | return 0; | |
922 | } | |
923 | ||
924 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 925 | _cleanup_free_ char *s = NULL; |
23a177ef | 926 | Unit *other; |
9e2f7c11 | 927 | int r; |
23a177ef LP |
928 | |
929 | assert(u); | |
930 | assert(name); | |
931 | ||
7410616c | 932 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 933 | if (!u->instance) |
9e2f7c11 LP |
934 | return -EINVAL; |
935 | ||
7410616c LP |
936 | r = unit_name_replace_instance(name, u->instance, &s); |
937 | if (r < 0) | |
938 | return r; | |
9e2f7c11 LP |
939 | |
940 | name = s; | |
941 | } | |
942 | ||
c2756a68 | 943 | other = manager_get_unit(u->manager, name); |
7410616c LP |
944 | if (other) |
945 | return unit_merge(u, other); | |
23a177ef | 946 | |
7410616c | 947 | return unit_add_name(u, name); |
23a177ef LP |
948 | } |
949 | ||
950 | Unit* unit_follow_merge(Unit *u) { | |
951 | assert(u); | |
952 | ||
ac155bb8 MS |
953 | while (u->load_state == UNIT_MERGED) |
954 | assert_se(u = u->merged_into); | |
23a177ef LP |
955 | |
956 | return u; | |
957 | } | |
958 | ||
959 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
ada5e276 YW |
960 | ExecDirectoryType dt; |
961 | char **dp; | |
23a177ef LP |
962 | int r; |
963 | ||
964 | assert(u); | |
965 | assert(c); | |
966 | ||
36be24c8 | 967 | if (c->working_directory) { |
eef85c4a | 968 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
969 | if (r < 0) |
970 | return r; | |
971 | } | |
972 | ||
973 | if (c->root_directory) { | |
eef85c4a | 974 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
975 | if (r < 0) |
976 | return r; | |
977 | } | |
978 | ||
915e6d16 | 979 | if (c->root_image) { |
eef85c4a | 980 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
981 | if (r < 0) |
982 | return r; | |
983 | } | |
984 | ||
72fd1768 | 985 | for (dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
986 | if (!u->manager->prefix[dt]) |
987 | continue; | |
988 | ||
989 | STRV_FOREACH(dp, c->directories[dt].paths) { | |
990 | _cleanup_free_ char *p; | |
991 | ||
992 | p = strjoin(u->manager->prefix[dt], "/", *dp); | |
993 | if (!p) | |
994 | return -ENOMEM; | |
995 | ||
eef85c4a | 996 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
997 | if (r < 0) |
998 | return r; | |
999 | } | |
1000 | } | |
1001 | ||
463d0d15 | 1002 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
1003 | return 0; |
1004 | ||
1005 | if (c->private_tmp) { | |
d71f0505 LP |
1006 | const char *p; |
1007 | ||
1008 | FOREACH_STRING(p, "/tmp", "/var/tmp") { | |
eef85c4a | 1009 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
d71f0505 LP |
1010 | if (r < 0) |
1011 | return r; | |
1012 | } | |
b46a529c | 1013 | |
35d8c19a | 1014 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1015 | if (r < 0) |
1016 | return r; | |
1017 | } | |
1018 | ||
52c239d7 LB |
1019 | if (!IN_SET(c->std_output, |
1020 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1021 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1022 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE) && | |
1023 | !IN_SET(c->std_error, | |
1024 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1025 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1026 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE)) | |
23a177ef LP |
1027 | return 0; |
1028 | ||
1029 | /* If syslog or kernel logging is requested, make sure our own | |
1030 | * logging daemon is run first. */ | |
1031 | ||
35d8c19a | 1032 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1033 | if (r < 0) |
1034 | return r; | |
23a177ef | 1035 | |
87f0e418 LP |
1036 | return 0; |
1037 | } | |
1038 | ||
87f0e418 LP |
1039 | const char *unit_description(Unit *u) { |
1040 | assert(u); | |
1041 | ||
ac155bb8 MS |
1042 | if (u->description) |
1043 | return u->description; | |
87f0e418 | 1044 | |
ac155bb8 | 1045 | return strna(u->id); |
87f0e418 LP |
1046 | } |
1047 | ||
eef85c4a LP |
1048 | static void print_unit_dependency_mask(FILE *f, const char *kind, UnitDependencyMask mask, bool *space) { |
1049 | const struct { | |
1050 | UnitDependencyMask mask; | |
1051 | const char *name; | |
1052 | } table[] = { | |
1053 | { UNIT_DEPENDENCY_FILE, "file" }, | |
1054 | { UNIT_DEPENDENCY_IMPLICIT, "implicit" }, | |
1055 | { UNIT_DEPENDENCY_DEFAULT, "default" }, | |
1056 | { UNIT_DEPENDENCY_UDEV, "udev" }, | |
1057 | { UNIT_DEPENDENCY_PATH, "path" }, | |
1058 | { UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT, "mountinfo-implicit" }, | |
1059 | { UNIT_DEPENDENCY_MOUNTINFO_DEFAULT, "mountinfo-default" }, | |
1060 | { UNIT_DEPENDENCY_PROC_SWAP, "proc-swap" }, | |
1061 | }; | |
1062 | size_t i; | |
1063 | ||
1064 | assert(f); | |
1065 | assert(kind); | |
1066 | assert(space); | |
1067 | ||
1068 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
1069 | ||
1070 | if (mask == 0) | |
1071 | break; | |
1072 | ||
d94a24ca | 1073 | if (FLAGS_SET(mask, table[i].mask)) { |
eef85c4a LP |
1074 | if (*space) |
1075 | fputc(' ', f); | |
1076 | else | |
1077 | *space = true; | |
1078 | ||
1079 | fputs(kind, f); | |
1080 | fputs("-", f); | |
1081 | fputs(table[i].name, f); | |
1082 | ||
1083 | mask &= ~table[i].mask; | |
1084 | } | |
1085 | } | |
1086 | ||
1087 | assert(mask == 0); | |
1088 | } | |
1089 | ||
87f0e418 | 1090 | void unit_dump(Unit *u, FILE *f, const char *prefix) { |
49dbfa7b | 1091 | char *t, **j; |
87f0e418 LP |
1092 | UnitDependency d; |
1093 | Iterator i; | |
47be870b | 1094 | const char *prefix2; |
173e3821 | 1095 | char |
a483fb59 | 1096 | timestamp0[FORMAT_TIMESTAMP_MAX], |
173e3821 LP |
1097 | timestamp1[FORMAT_TIMESTAMP_MAX], |
1098 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
1099 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
1100 | timestamp4[FORMAT_TIMESTAMP_MAX], |
1101 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 1102 | Unit *following; |
eeaedb7c | 1103 | _cleanup_set_free_ Set *following_set = NULL; |
05a98afd | 1104 | const char *n; |
02638280 LP |
1105 | CGroupMask m; |
1106 | int r; | |
87f0e418 LP |
1107 | |
1108 | assert(u); | |
ac155bb8 | 1109 | assert(u->type >= 0); |
87f0e418 | 1110 | |
4c940960 | 1111 | prefix = strempty(prefix); |
63c372cb | 1112 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
1113 | |
1114 | fprintf(f, | |
40d50879 | 1115 | "%s-> Unit %s:\n" |
87f0e418 | 1116 | "%s\tDescription: %s\n" |
9e2f7c11 | 1117 | "%s\tInstance: %s\n" |
87f0e418 | 1118 | "%s\tUnit Load State: %s\n" |
2fad8195 | 1119 | "%s\tUnit Active State: %s\n" |
b895d155 | 1120 | "%s\tState Change Timestamp: %s\n" |
173e3821 | 1121 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 1122 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 1123 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 1124 | "%s\tInactive Enter Timestamp: %s\n" |
f2f725e5 | 1125 | "%s\tMay GC: %s\n" |
9444b1f2 | 1126 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 1127 | "%s\tTransient: %s\n" |
f5869324 | 1128 | "%s\tPerpetual: %s\n" |
5afe510c | 1129 | "%s\tGarbage Collection Mode: %s\n" |
4ad49000 LP |
1130 | "%s\tSlice: %s\n" |
1131 | "%s\tCGroup: %s\n" | |
aae7e17f | 1132 | "%s\tCGroup realized: %s\n", |
ac155bb8 | 1133 | prefix, u->id, |
87f0e418 | 1134 | prefix, unit_description(u), |
ac155bb8 MS |
1135 | prefix, strna(u->instance), |
1136 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 1137 | prefix, unit_active_state_to_string(unit_active_state(u)), |
a483fb59 | 1138 | prefix, strna(format_timestamp(timestamp0, sizeof(timestamp0), u->state_change_timestamp.realtime)), |
ac155bb8 MS |
1139 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
1140 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
1141 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
1142 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
f2f725e5 | 1143 | prefix, yes_no(unit_may_gc(u)), |
9444b1f2 | 1144 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 1145 | prefix, yes_no(u->transient), |
f5869324 | 1146 | prefix, yes_no(u->perpetual), |
5afe510c | 1147 | prefix, collect_mode_to_string(u->collect_mode), |
4ad49000 LP |
1148 | prefix, strna(unit_slice_name(u)), |
1149 | prefix, strna(u->cgroup_path), | |
aae7e17f FB |
1150 | prefix, yes_no(u->cgroup_realized)); |
1151 | ||
1152 | if (u->cgroup_realized_mask != 0) { | |
1153 | _cleanup_free_ char *s = NULL; | |
1154 | (void) cg_mask_to_string(u->cgroup_realized_mask, &s); | |
02638280 LP |
1155 | fprintf(f, "%s\tCGroup realized mask: %s\n", prefix, strnull(s)); |
1156 | } | |
1157 | if (u->cgroup_enabled_mask != 0) { | |
1158 | _cleanup_free_ char *s = NULL; | |
1159 | (void) cg_mask_to_string(u->cgroup_enabled_mask, &s); | |
1160 | fprintf(f, "%s\tCGroup enabled mask: %s\n", prefix, strnull(s)); | |
1161 | } | |
1162 | m = unit_get_own_mask(u); | |
1163 | if (m != 0) { | |
1164 | _cleanup_free_ char *s = NULL; | |
1165 | (void) cg_mask_to_string(m, &s); | |
1166 | fprintf(f, "%s\tCGroup own mask: %s\n", prefix, strnull(s)); | |
aae7e17f | 1167 | } |
02638280 LP |
1168 | m = unit_get_members_mask(u); |
1169 | if (m != 0) { | |
aae7e17f | 1170 | _cleanup_free_ char *s = NULL; |
02638280 | 1171 | (void) cg_mask_to_string(m, &s); |
aae7e17f FB |
1172 | fprintf(f, "%s\tCGroup members mask: %s\n", prefix, strnull(s)); |
1173 | } | |
0301abf4 | 1174 | |
ac155bb8 | 1175 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
1176 | fprintf(f, "%s\tName: %s\n", prefix, t); |
1177 | ||
4b58153d LP |
1178 | if (!sd_id128_is_null(u->invocation_id)) |
1179 | fprintf(f, "%s\tInvocation ID: " SD_ID128_FORMAT_STR "\n", | |
1180 | prefix, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
1181 | ||
49dbfa7b LP |
1182 | STRV_FOREACH(j, u->documentation) |
1183 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
1184 | ||
eeaedb7c LP |
1185 | following = unit_following(u); |
1186 | if (following) | |
ac155bb8 | 1187 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 1188 | |
eeaedb7c LP |
1189 | r = unit_following_set(u, &following_set); |
1190 | if (r >= 0) { | |
1191 | Unit *other; | |
1192 | ||
1193 | SET_FOREACH(other, following_set, i) | |
1194 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
1195 | } | |
1196 | ||
ac155bb8 MS |
1197 | if (u->fragment_path) |
1198 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 1199 | |
1b64d026 LP |
1200 | if (u->source_path) |
1201 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
1202 | ||
ae7a7182 | 1203 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 1204 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 1205 | |
e7dfbb4e LP |
1206 | if (u->failure_action != EMERGENCY_ACTION_NONE) |
1207 | fprintf(f, "%s\tFailure Action: %s\n", prefix, emergency_action_to_string(u->failure_action)); | |
1208 | if (u->success_action != EMERGENCY_ACTION_NONE) | |
1209 | fprintf(f, "%s\tSuccess Action: %s\n", prefix, emergency_action_to_string(u->success_action)); | |
1210 | ||
36c16a7c | 1211 | if (u->job_timeout != USEC_INFINITY) |
2fa4092c | 1212 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 1213 | |
87a47f99 LN |
1214 | if (u->job_timeout_action != EMERGENCY_ACTION_NONE) |
1215 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, emergency_action_to_string(u->job_timeout_action)); | |
f189ab18 LP |
1216 | |
1217 | if (u->job_timeout_reboot_arg) | |
1218 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
1219 | ||
59fccdc5 LP |
1220 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
1221 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 1222 | |
ac155bb8 | 1223 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
1224 | fprintf(f, |
1225 | "%s\tCondition Timestamp: %s\n" | |
1226 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
1227 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
1228 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 1229 | |
59fccdc5 LP |
1230 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
1231 | fprintf(f, | |
1232 | "%s\tAssert Timestamp: %s\n" | |
1233 | "%s\tAssert Result: %s\n", | |
1234 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
1235 | prefix, yes_no(u->assert_result)); | |
1236 | ||
87f0e418 | 1237 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
eef85c4a | 1238 | UnitDependencyInfo di; |
87f0e418 LP |
1239 | Unit *other; |
1240 | ||
eef85c4a LP |
1241 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { |
1242 | bool space = false; | |
1243 | ||
1244 | fprintf(f, "%s\t%s: %s (", prefix, unit_dependency_to_string(d), other->id); | |
1245 | ||
1246 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); | |
1247 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1248 | ||
1249 | fputs(")\n", f); | |
1250 | } | |
87f0e418 LP |
1251 | } |
1252 | ||
eef85c4a LP |
1253 | if (!hashmap_isempty(u->requires_mounts_for)) { |
1254 | UnitDependencyInfo di; | |
1255 | const char *path; | |
1256 | ||
1257 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { | |
1258 | bool space = false; | |
7c8fa05c | 1259 | |
eef85c4a | 1260 | fprintf(f, "%s\tRequiresMountsFor: %s (", prefix, path); |
7c8fa05c | 1261 | |
eef85c4a LP |
1262 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); |
1263 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1264 | ||
1265 | fputs(")\n", f); | |
1266 | } | |
7c8fa05c LP |
1267 | } |
1268 | ||
ac155bb8 | 1269 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 1270 | |
b0650475 | 1271 | fprintf(f, |
a40eb732 | 1272 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
1273 | "%s\tRefuseManualStart: %s\n" |
1274 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 1275 | "%s\tDefaultDependencies: %s\n" |
d420282b | 1276 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1277 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1278 | prefix, yes_no(u->stop_when_unneeded), |
1279 | prefix, yes_no(u->refuse_manual_start), | |
1280 | prefix, yes_no(u->refuse_manual_stop), | |
1281 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1282 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1283 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 1284 | |
23a177ef LP |
1285 | if (UNIT_VTABLE(u)->dump) |
1286 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1287 | |
ac155bb8 | 1288 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1289 | fprintf(f, |
1290 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1291 | prefix, u->merged_into->id); |
1292 | else if (u->load_state == UNIT_ERROR) | |
1293 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 1294 | |
05a98afd LP |
1295 | for (n = sd_bus_track_first(u->bus_track); n; n = sd_bus_track_next(u->bus_track)) |
1296 | fprintf(f, "%s\tBus Ref: %s\n", prefix, n); | |
87f0e418 | 1297 | |
ac155bb8 MS |
1298 | if (u->job) |
1299 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1300 | |
e0209d83 MS |
1301 | if (u->nop_job) |
1302 | job_dump(u->nop_job, f, prefix2); | |
87f0e418 LP |
1303 | } |
1304 | ||
1305 | /* Common implementation for multiple backends */ | |
e537352b | 1306 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1307 | int r; |
1308 | ||
1309 | assert(u); | |
23a177ef | 1310 | |
e48614c4 | 1311 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1312 | r = unit_load_fragment(u); |
1313 | if (r < 0) | |
23a177ef LP |
1314 | return r; |
1315 | ||
ac155bb8 | 1316 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1317 | return -ENOENT; |
1318 | ||
9e4ea9cc ZJS |
1319 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1320 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1321 | * been loaded and which not, at least without doing complicated book-keeping, | |
1322 | * so let's always reread all drop-ins. */ | |
1323 | return unit_load_dropin(unit_follow_merge(u)); | |
23a177ef LP |
1324 | } |
1325 | ||
1326 | /* Common implementation for multiple backends */ | |
e537352b | 1327 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1328 | int r; |
87f0e418 LP |
1329 | |
1330 | assert(u); | |
1331 | ||
23a177ef LP |
1332 | /* Same as unit_load_fragment_and_dropin(), but whether |
1333 | * something can be loaded or not doesn't matter. */ | |
1334 | ||
e9e8cbc8 | 1335 | /* Load a .service/.socket/.slice/… file */ |
4ad49000 LP |
1336 | r = unit_load_fragment(u); |
1337 | if (r < 0) | |
87f0e418 LP |
1338 | return r; |
1339 | ||
ac155bb8 MS |
1340 | if (u->load_state == UNIT_STUB) |
1341 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1342 | |
9e4ea9cc ZJS |
1343 | /* Load drop-in directory data */ |
1344 | return unit_load_dropin(unit_follow_merge(u)); | |
87f0e418 LP |
1345 | } |
1346 | ||
19496554 MS |
1347 | void unit_add_to_target_deps_queue(Unit *u) { |
1348 | Manager *m = u->manager; | |
1349 | ||
1350 | assert(u); | |
1351 | ||
1352 | if (u->in_target_deps_queue) | |
1353 | return; | |
1354 | ||
1355 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1356 | u->in_target_deps_queue = true; | |
1357 | } | |
1358 | ||
bba34eed | 1359 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1360 | assert(u); |
1361 | assert(target); | |
1362 | ||
ac155bb8 | 1363 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1364 | return 0; |
1365 | ||
35b8ca3a | 1366 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1367 | * that loop check below is reliable */ |
ac155bb8 MS |
1368 | if (u->load_state != UNIT_LOADED || |
1369 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1370 | return 0; |
1371 | ||
21256a2b LP |
1372 | /* If either side wants no automatic dependencies, then let's |
1373 | * skip this */ | |
ac155bb8 MS |
1374 | if (!u->default_dependencies || |
1375 | !target->default_dependencies) | |
21256a2b LP |
1376 | return 0; |
1377 | ||
98bc2000 | 1378 | /* Don't create loops */ |
eef85c4a | 1379 | if (hashmap_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1380 | return 0; |
1381 | ||
eef85c4a | 1382 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1383 | } |
1384 | ||
e954c9cf | 1385 | static int unit_add_slice_dependencies(Unit *u) { |
eef85c4a | 1386 | UnitDependencyMask mask; |
e954c9cf | 1387 | assert(u); |
b81884e7 | 1388 | |
35b7ff80 | 1389 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1390 | return 0; |
1391 | ||
eef85c4a LP |
1392 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1393 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1394 | relationship). */ | |
1395 | mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; | |
1396 | ||
e954c9cf | 1397 | if (UNIT_ISSET(u->slice)) |
eef85c4a | 1398 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true, mask); |
e954c9cf | 1399 | |
8c8da0e0 | 1400 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1401 | return 0; |
1402 | ||
5a724170 | 1403 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, true, mask); |
98bc2000 LP |
1404 | } |
1405 | ||
e954c9cf | 1406 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1407 | UnitDependencyInfo di; |
1408 | const char *path; | |
1409 | Iterator i; | |
9588bc32 LP |
1410 | int r; |
1411 | ||
1412 | assert(u); | |
1413 | ||
eef85c4a LP |
1414 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { |
1415 | char prefix[strlen(path) + 1]; | |
9588bc32 | 1416 | |
eef85c4a | 1417 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1418 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1419 | Unit *m; |
1420 | ||
c7c89abb | 1421 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1422 | if (r < 0) |
1423 | return r; | |
c7c89abb FB |
1424 | |
1425 | m = manager_get_unit(u->manager, p); | |
1426 | if (!m) { | |
1427 | /* Make sure to load the mount unit if | |
1428 | * it exists. If so the dependencies | |
1429 | * on this unit will be added later | |
1430 | * during the loading of the mount | |
1431 | * unit. */ | |
1432 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1433 | continue; |
c7c89abb | 1434 | } |
9588bc32 LP |
1435 | if (m == u) |
1436 | continue; | |
1437 | ||
1438 | if (m->load_state != UNIT_LOADED) | |
1439 | continue; | |
1440 | ||
eef85c4a | 1441 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1442 | if (r < 0) |
1443 | return r; | |
1444 | ||
1445 | if (m->fragment_path) { | |
eef85c4a | 1446 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1447 | if (r < 0) |
1448 | return r; | |
1449 | } | |
1450 | } | |
1451 | } | |
1452 | ||
1453 | return 0; | |
1454 | } | |
1455 | ||
95ae05c0 WC |
1456 | static int unit_add_startup_units(Unit *u) { |
1457 | CGroupContext *c; | |
5269eb6b | 1458 | int r; |
95ae05c0 WC |
1459 | |
1460 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1461 | if (!c) |
1462 | return 0; | |
1463 | ||
d53d9474 | 1464 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1465 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1466 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1467 | return 0; |
1468 | ||
5269eb6b LP |
1469 | r = set_ensure_allocated(&u->manager->startup_units, NULL); |
1470 | if (r < 0) | |
1471 | return r; | |
1472 | ||
756c09e6 | 1473 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1474 | } |
1475 | ||
87f0e418 LP |
1476 | int unit_load(Unit *u) { |
1477 | int r; | |
1478 | ||
1479 | assert(u); | |
1480 | ||
ac155bb8 | 1481 | if (u->in_load_queue) { |
71fda00f | 1482 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1483 | u->in_load_queue = false; |
87f0e418 LP |
1484 | } |
1485 | ||
ac155bb8 | 1486 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1487 | return -EINVAL; |
1488 | ||
ac155bb8 | 1489 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1490 | return 0; |
1491 | ||
4f4afc88 LP |
1492 | if (u->transient_file) { |
1493 | r = fflush_and_check(u->transient_file); | |
1494 | if (r < 0) | |
1495 | goto fail; | |
1496 | ||
50fb00b7 | 1497 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1498 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1499 | } |
1500 | ||
c2756a68 LP |
1501 | if (UNIT_VTABLE(u)->load) { |
1502 | r = UNIT_VTABLE(u)->load(u); | |
1503 | if (r < 0) | |
87f0e418 | 1504 | goto fail; |
c2756a68 | 1505 | } |
23a177ef | 1506 | |
ac155bb8 | 1507 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1508 | r = -ENOENT; |
1509 | goto fail; | |
1510 | } | |
1511 | ||
7c8fa05c | 1512 | if (u->load_state == UNIT_LOADED) { |
19496554 | 1513 | unit_add_to_target_deps_queue(u); |
e954c9cf LP |
1514 | |
1515 | r = unit_add_slice_dependencies(u); | |
1516 | if (r < 0) | |
1517 | goto fail; | |
c2756a68 | 1518 | |
e954c9cf | 1519 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1520 | if (r < 0) |
c2756a68 | 1521 | goto fail; |
7c8fa05c | 1522 | |
95ae05c0 WC |
1523 | r = unit_add_startup_units(u); |
1524 | if (r < 0) | |
1525 | goto fail; | |
1526 | ||
eef85c4a | 1527 | if (u->on_failure_job_mode == JOB_ISOLATE && hashmap_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1528 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
6f40aa45 | 1529 | r = -ENOEXEC; |
c2756a68 LP |
1530 | goto fail; |
1531 | } | |
bc432dc7 | 1532 | |
a2df3ea4 MK |
1533 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1534 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1535 | ||
bc432dc7 | 1536 | unit_update_cgroup_members_masks(u); |
f68319bb LP |
1537 | } |
1538 | ||
ac155bb8 | 1539 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1540 | |
1541 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1542 | unit_add_to_gc_queue(u); |
87f0e418 | 1543 | |
87f0e418 LP |
1544 | return 0; |
1545 | ||
1546 | fail: | |
c4555ad8 LP |
1547 | /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code should hence |
1548 | * return ENOEXEC to ensure units are placed in this state after loading */ | |
1549 | ||
1550 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : | |
1551 | r == -ENOEXEC ? UNIT_BAD_SETTING : | |
1552 | UNIT_ERROR; | |
ac155bb8 | 1553 | u->load_error = r; |
c4555ad8 | 1554 | |
c1e1601e | 1555 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1556 | unit_add_to_gc_queue(u); |
23a177ef | 1557 | |
c4555ad8 | 1558 | return log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
87f0e418 LP |
1559 | } |
1560 | ||
49365733 LP |
1561 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1562 | Condition *c; | |
1563 | int triggered = -1; | |
1564 | ||
1565 | assert(u); | |
1566 | assert(to_string); | |
1567 | ||
1568 | /* If the condition list is empty, then it is true */ | |
1569 | if (!first) | |
1570 | return true; | |
1571 | ||
1572 | /* Otherwise, if all of the non-trigger conditions apply and | |
1573 | * if any of the trigger conditions apply (unless there are | |
1574 | * none) we return true */ | |
1575 | LIST_FOREACH(conditions, c, first) { | |
1576 | int r; | |
1577 | ||
1578 | r = condition_test(c); | |
1579 | if (r < 0) | |
f2341e0a LP |
1580 | log_unit_warning(u, |
1581 | "Couldn't determine result for %s=%s%s%s, assuming failed: %m", | |
49365733 LP |
1582 | to_string(c->type), |
1583 | c->trigger ? "|" : "", | |
1584 | c->negate ? "!" : "", | |
f2341e0a | 1585 | c->parameter); |
49365733 | 1586 | else |
f2341e0a LP |
1587 | log_unit_debug(u, |
1588 | "%s=%s%s%s %s.", | |
49365733 LP |
1589 | to_string(c->type), |
1590 | c->trigger ? "|" : "", | |
1591 | c->negate ? "!" : "", | |
1592 | c->parameter, | |
f2341e0a | 1593 | condition_result_to_string(c->result)); |
49365733 LP |
1594 | |
1595 | if (!c->trigger && r <= 0) | |
1596 | return false; | |
1597 | ||
1598 | if (c->trigger && triggered <= 0) | |
1599 | triggered = r > 0; | |
1600 | } | |
1601 | ||
1602 | return triggered != 0; | |
1603 | } | |
1604 | ||
9588bc32 | 1605 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1606 | assert(u); |
1607 | ||
ac155bb8 | 1608 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1609 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1610 | |
ac155bb8 | 1611 | return u->condition_result; |
90bbc946 LP |
1612 | } |
1613 | ||
59fccdc5 LP |
1614 | static bool unit_assert_test(Unit *u) { |
1615 | assert(u); | |
1616 | ||
1617 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1618 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1619 | |
1620 | return u->assert_result; | |
1621 | } | |
1622 | ||
df446f96 LP |
1623 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
1624 | DISABLE_WARNING_FORMAT_NONLITERAL; | |
1625 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, status, unit_status_msg_format, unit_description(u)); | |
1626 | REENABLE_WARNING; | |
1627 | } | |
1628 | ||
44a6b1b6 | 1629 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
877d54e9 | 1630 | const char *format; |
a85ca902 | 1631 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1632 | |
1633 | assert(u); | |
df446f96 | 1634 | assert(IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)); |
877d54e9 | 1635 | |
b5bf308b | 1636 | if (t != JOB_RELOAD) { |
a85ca902 MS |
1637 | format_table = &UNIT_VTABLE(u)->status_message_formats; |
1638 | if (format_table) { | |
1639 | format = format_table->starting_stopping[t == JOB_STOP]; | |
1640 | if (format) | |
1641 | return format; | |
1642 | } | |
1643 | } | |
877d54e9 LP |
1644 | |
1645 | /* Return generic strings */ | |
1646 | if (t == JOB_START) | |
1647 | return "Starting %s."; | |
1648 | else if (t == JOB_STOP) | |
1649 | return "Stopping %s."; | |
b5bf308b | 1650 | else |
877d54e9 | 1651 | return "Reloading %s."; |
877d54e9 LP |
1652 | } |
1653 | ||
1654 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1655 | const char *format; | |
1656 | ||
1657 | assert(u); | |
1658 | ||
df446f96 LP |
1659 | /* Reload status messages have traditionally not been printed to console. */ |
1660 | if (!IN_SET(t, JOB_START, JOB_STOP)) | |
1661 | return; | |
1662 | ||
877d54e9 | 1663 | format = unit_get_status_message_format(u, t); |
c6918296 | 1664 | |
bcfce235 | 1665 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1666 | unit_status_printf(u, "", format); |
bcfce235 | 1667 | REENABLE_WARNING; |
c6918296 MS |
1668 | } |
1669 | ||
877d54e9 | 1670 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
2b044526 | 1671 | const char *format, *mid; |
877d54e9 | 1672 | char buf[LINE_MAX]; |
877d54e9 LP |
1673 | |
1674 | assert(u); | |
1675 | ||
df446f96 | 1676 | if (!IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)) |
877d54e9 LP |
1677 | return; |
1678 | ||
81270860 LP |
1679 | if (log_on_console()) |
1680 | return; | |
1681 | ||
877d54e9 LP |
1682 | /* We log status messages for all units and all operations. */ |
1683 | ||
a85ca902 | 1684 | format = unit_get_status_message_format(u, t); |
877d54e9 | 1685 | |
bcfce235 | 1686 | DISABLE_WARNING_FORMAT_NONLITERAL; |
bea28c5a | 1687 | (void) snprintf(buf, sizeof buf, format, unit_description(u)); |
bcfce235 | 1688 | REENABLE_WARNING; |
877d54e9 | 1689 | |
2b044526 ZJS |
1690 | mid = t == JOB_START ? "MESSAGE_ID=" SD_MESSAGE_UNIT_STARTING_STR : |
1691 | t == JOB_STOP ? "MESSAGE_ID=" SD_MESSAGE_UNIT_STOPPING_STR : | |
1692 | "MESSAGE_ID=" SD_MESSAGE_UNIT_RELOADING_STR; | |
877d54e9 | 1693 | |
f2341e0a LP |
1694 | /* Note that we deliberately use LOG_MESSAGE() instead of |
1695 | * LOG_UNIT_MESSAGE() here, since this is supposed to mimic | |
1696 | * closely what is written to screen using the status output, | |
1697 | * which is supposed the highest level, friendliest output | |
1698 | * possible, which means we should avoid the low-level unit | |
1699 | * name. */ | |
1700 | log_struct(LOG_INFO, | |
f2341e0a | 1701 | LOG_MESSAGE("%s", buf), |
ba360bb0 | 1702 | LOG_UNIT_ID(u), |
f1c50bec | 1703 | LOG_UNIT_INVOCATION_ID(u), |
a1230ff9 | 1704 | mid); |
877d54e9 | 1705 | } |
877d54e9 | 1706 | |
d1a34ae9 | 1707 | void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t) { |
df446f96 LP |
1708 | assert(u); |
1709 | assert(t >= 0); | |
1710 | assert(t < _JOB_TYPE_MAX); | |
d1a34ae9 MS |
1711 | |
1712 | unit_status_log_starting_stopping_reloading(u, t); | |
df446f96 | 1713 | unit_status_print_starting_stopping(u, t); |
d1a34ae9 MS |
1714 | } |
1715 | ||
07299350 | 1716 | int unit_start_limit_test(Unit *u) { |
6bf0f408 LP |
1717 | assert(u); |
1718 | ||
7994ac1d | 1719 | if (ratelimit_below(&u->start_limit)) { |
6bf0f408 LP |
1720 | u->start_limit_hit = false; |
1721 | return 0; | |
1722 | } | |
1723 | ||
1724 | log_unit_warning(u, "Start request repeated too quickly."); | |
1725 | u->start_limit_hit = true; | |
1726 | ||
c7adcb1a ZJS |
1727 | return emergency_action(u->manager, u->start_limit_action, |
1728 | EMERGENCY_ACTION_IS_WATCHDOG|EMERGENCY_ACTION_WARN, | |
1710d4be | 1729 | u->reboot_arg, "unit failed"); |
6bf0f408 LP |
1730 | } |
1731 | ||
c891efaf | 1732 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1733 | assert(u); |
c891efaf FB |
1734 | |
1735 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1736 | return false; | |
1737 | ||
1738 | /* For some reasons units remaining in the same process group | |
1739 | * as PID 1 fail to acquire the console even if it's not used | |
1740 | * by any process. So skip the confirmation question for them. */ | |
1741 | return !unit_get_exec_context(u)->same_pgrp; | |
1742 | } | |
1743 | ||
631b676b LP |
1744 | static bool unit_verify_deps(Unit *u) { |
1745 | Unit *other; | |
1746 | Iterator j; | |
eef85c4a | 1747 | void *v; |
631b676b LP |
1748 | |
1749 | assert(u); | |
1750 | ||
1751 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with | |
1752 | * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job | |
1753 | * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in | |
1754 | * conjunction with After= as for them any such check would make things entirely racy. */ | |
1755 | ||
eef85c4a | 1756 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], j) { |
631b676b | 1757 | |
eef85c4a | 1758 | if (!hashmap_contains(u->dependencies[UNIT_AFTER], other)) |
631b676b LP |
1759 | continue; |
1760 | ||
1761 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1762 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1763 | return false; | |
1764 | } | |
1765 | } | |
1766 | ||
1767 | return true; | |
1768 | } | |
1769 | ||
87f0e418 | 1770 | /* Errors: |
6bf0f408 LP |
1771 | * -EBADR: This unit type does not support starting. |
1772 | * -EALREADY: Unit is already started. | |
1773 | * -EAGAIN: An operation is already in progress. Retry later. | |
1774 | * -ECANCELED: Too many requests for now. | |
1775 | * -EPROTO: Assert failed | |
1776 | * -EINVAL: Unit not loaded | |
1777 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1778 | * -ENOLINK: The necessary dependencies are not fulfilled. |
d4fd1cf2 | 1779 | * -ESTALE: This unit has been started before and can't be started a second time |
87f0e418 LP |
1780 | */ |
1781 | int unit_start(Unit *u) { | |
1782 | UnitActiveState state; | |
92ab323c | 1783 | Unit *following; |
87f0e418 LP |
1784 | |
1785 | assert(u); | |
1786 | ||
a82e5507 LP |
1787 | /* If this is already started, then this will succeed. Note |
1788 | * that this will even succeed if this unit is not startable | |
1789 | * by the user. This is relied on to detect when we need to | |
1790 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1791 | state = unit_active_state(u); |
1792 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1793 | return -EALREADY; | |
1794 | ||
6bf0f408 LP |
1795 | /* Units that aren't loaded cannot be started */ |
1796 | if (u->load_state != UNIT_LOADED) | |
1797 | return -EINVAL; | |
1798 | ||
d4fd1cf2 LP |
1799 | /* Refuse starting scope units more than once */ |
1800 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1801 | return -ESTALE; | |
1802 | ||
a82e5507 LP |
1803 | /* If the conditions failed, don't do anything at all. If we |
1804 | * already are activating this call might still be useful to | |
1805 | * speed up activation in case there is some hold-off time, | |
1806 | * but we don't want to recheck the condition in that case. */ | |
1807 | if (state != UNIT_ACTIVATING && | |
1808 | !unit_condition_test(u)) { | |
f2341e0a | 1809 | log_unit_debug(u, "Starting requested but condition failed. Not starting unit."); |
52661efd LP |
1810 | return -EALREADY; |
1811 | } | |
1812 | ||
59fccdc5 LP |
1813 | /* If the asserts failed, fail the entire job */ |
1814 | if (state != UNIT_ACTIVATING && | |
1815 | !unit_assert_test(u)) { | |
f2341e0a | 1816 | log_unit_notice(u, "Starting requested but asserts failed."); |
59fccdc5 LP |
1817 | return -EPROTO; |
1818 | } | |
1819 | ||
d11a7645 LP |
1820 | /* Units of types that aren't supported cannot be |
1821 | * started. Note that we do this test only after the condition | |
1822 | * checks, so that we rather return condition check errors | |
1823 | * (which are usually not considered a true failure) than "not | |
1824 | * supported" errors (which are considered a failure). | |
1825 | */ | |
1826 | if (!unit_supported(u)) | |
1827 | return -EOPNOTSUPP; | |
1828 | ||
631b676b LP |
1829 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine should have |
1830 | * taken care of this already, but let's check this here again. After all, our dependencies might not be in | |
1831 | * effect anymore, due to a reload or due to a failed condition. */ | |
1832 | if (!unit_verify_deps(u)) | |
1833 | return -ENOLINK; | |
1834 | ||
92ab323c | 1835 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1836 | following = unit_following(u); |
1837 | if (following) { | |
f2341e0a | 1838 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1839 | return unit_start(following); |
1840 | } | |
1841 | ||
1842 | /* If it is stopped, but we cannot start it, then fail */ | |
1843 | if (!UNIT_VTABLE(u)->start) | |
1844 | return -EBADR; | |
1845 | ||
87f0e418 LP |
1846 | /* We don't suppress calls to ->start() here when we are |
1847 | * already starting, to allow this request to be used as a | |
1848 | * "hurry up" call, for example when the unit is in some "auto | |
1849 | * restart" state where it waits for a holdoff timer to elapse | |
1850 | * before it will start again. */ | |
1851 | ||
c1e1601e | 1852 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1853 | |
d1a34ae9 | 1854 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1855 | } |
1856 | ||
1857 | bool unit_can_start(Unit *u) { | |
1858 | assert(u); | |
1859 | ||
8ff4d2ab LP |
1860 | if (u->load_state != UNIT_LOADED) |
1861 | return false; | |
1862 | ||
1863 | if (!unit_supported(u)) | |
1864 | return false; | |
1865 | ||
d4fd1cf2 LP |
1866 | /* Scope units may be started only once */ |
1867 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
1868 | return false; | |
1869 | ||
87f0e418 LP |
1870 | return !!UNIT_VTABLE(u)->start; |
1871 | } | |
1872 | ||
2528a7a6 LP |
1873 | bool unit_can_isolate(Unit *u) { |
1874 | assert(u); | |
1875 | ||
1876 | return unit_can_start(u) && | |
ac155bb8 | 1877 | u->allow_isolate; |
2528a7a6 LP |
1878 | } |
1879 | ||
87f0e418 LP |
1880 | /* Errors: |
1881 | * -EBADR: This unit type does not support stopping. | |
1882 | * -EALREADY: Unit is already stopped. | |
1883 | * -EAGAIN: An operation is already in progress. Retry later. | |
1884 | */ | |
1885 | int unit_stop(Unit *u) { | |
1886 | UnitActiveState state; | |
92ab323c | 1887 | Unit *following; |
87f0e418 LP |
1888 | |
1889 | assert(u); | |
1890 | ||
87f0e418 | 1891 | state = unit_active_state(u); |
fdf20a31 | 1892 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1893 | return -EALREADY; |
1894 | ||
0faacd47 LP |
1895 | following = unit_following(u); |
1896 | if (following) { | |
f2341e0a | 1897 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1898 | return unit_stop(following); |
1899 | } | |
1900 | ||
7898b0cf LP |
1901 | if (!UNIT_VTABLE(u)->stop) |
1902 | return -EBADR; | |
1903 | ||
c1e1601e | 1904 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1905 | |
d1a34ae9 | 1906 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1907 | } |
1908 | ||
f5869324 LP |
1909 | bool unit_can_stop(Unit *u) { |
1910 | assert(u); | |
1911 | ||
1912 | if (!unit_supported(u)) | |
1913 | return false; | |
1914 | ||
1915 | if (u->perpetual) | |
1916 | return false; | |
1917 | ||
1918 | return !!UNIT_VTABLE(u)->stop; | |
1919 | } | |
1920 | ||
87f0e418 LP |
1921 | /* Errors: |
1922 | * -EBADR: This unit type does not support reloading. | |
1923 | * -ENOEXEC: Unit is not started. | |
1924 | * -EAGAIN: An operation is already in progress. Retry later. | |
1925 | */ | |
1926 | int unit_reload(Unit *u) { | |
1927 | UnitActiveState state; | |
92ab323c | 1928 | Unit *following; |
87f0e418 LP |
1929 | |
1930 | assert(u); | |
1931 | ||
ac155bb8 | 1932 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1933 | return -EINVAL; |
1934 | ||
87f0e418 LP |
1935 | if (!unit_can_reload(u)) |
1936 | return -EBADR; | |
1937 | ||
1938 | state = unit_active_state(u); | |
e364ad06 | 1939 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1940 | return -EALREADY; |
1941 | ||
6a371e23 | 1942 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1943 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1944 | return -ENOEXEC; |
6a371e23 | 1945 | } |
87f0e418 | 1946 | |
e48614c4 ZJS |
1947 | following = unit_following(u); |
1948 | if (following) { | |
f2341e0a | 1949 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1950 | return unit_reload(following); |
1951 | } | |
1952 | ||
c1e1601e | 1953 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1954 | |
f54bcca5 JR |
1955 | if (!UNIT_VTABLE(u)->reload) { |
1956 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
2ad2e41a | 1957 | unit_notify(u, unit_active_state(u), unit_active_state(u), 0); |
f54bcca5 JR |
1958 | return 0; |
1959 | } | |
1960 | ||
d1a34ae9 | 1961 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1962 | } |
1963 | ||
1964 | bool unit_can_reload(Unit *u) { | |
1965 | assert(u); | |
1966 | ||
f54bcca5 JR |
1967 | if (UNIT_VTABLE(u)->can_reload) |
1968 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 1969 | |
eef85c4a | 1970 | if (!hashmap_isempty(u->dependencies[UNIT_PROPAGATES_RELOAD_TO])) |
87f0e418 LP |
1971 | return true; |
1972 | ||
f54bcca5 | 1973 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
1974 | } |
1975 | ||
a3c1168a LP |
1976 | bool unit_is_unneeded(Unit *u) { |
1977 | static const UnitDependency deps[] = { | |
be7d9ff7 | 1978 | UNIT_REQUIRED_BY, |
084918ba | 1979 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1980 | UNIT_WANTED_BY, |
1981 | UNIT_BOUND_BY, | |
1982 | }; | |
a3c1168a | 1983 | size_t j; |
f3bff0eb LP |
1984 | |
1985 | assert(u); | |
1986 | ||
ac155bb8 | 1987 | if (!u->stop_when_unneeded) |
a3c1168a | 1988 | return false; |
f3bff0eb | 1989 | |
a3c1168a LP |
1990 | /* Don't clean up while the unit is transitioning or is even inactive. */ |
1991 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
1992 | return false; | |
1993 | if (u->job) | |
1994 | return false; | |
f3bff0eb | 1995 | |
a3c1168a | 1996 | for (j = 0; j < ELEMENTSOF(deps); j++) { |
eef85c4a LP |
1997 | Unit *other; |
1998 | Iterator i; | |
1999 | void *v; | |
2000 | ||
fda09318 | 2001 | /* If a dependent unit has a job queued, is active or transitioning, or is marked for |
a3c1168a | 2002 | * restart, then don't clean this one up. */ |
b81884e7 | 2003 | |
a3c1168a | 2004 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[deps[j]], i) { |
93d4cb09 | 2005 | if (other->job) |
a3c1168a LP |
2006 | return false; |
2007 | ||
2008 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
2009 | return false; | |
2010 | ||
2011 | if (unit_will_restart(other)) | |
2012 | return false; | |
2013 | } | |
bea355da LP |
2014 | } |
2015 | ||
a3c1168a LP |
2016 | return true; |
2017 | } | |
f3bff0eb | 2018 | |
a3c1168a LP |
2019 | static void check_unneeded_dependencies(Unit *u) { |
2020 | ||
2021 | static const UnitDependency deps[] = { | |
2022 | UNIT_REQUIRES, | |
2023 | UNIT_REQUISITE, | |
2024 | UNIT_WANTS, | |
2025 | UNIT_BINDS_TO, | |
2026 | }; | |
2027 | size_t j; | |
2028 | ||
2029 | assert(u); | |
2030 | ||
2031 | /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */ | |
2032 | ||
2033 | for (j = 0; j < ELEMENTSOF(deps); j++) { | |
2034 | Unit *other; | |
2035 | Iterator i; | |
2036 | void *v; | |
2037 | ||
2038 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[deps[j]], i) | |
fda09318 | 2039 | unit_submit_to_stop_when_unneeded_queue(other); |
a3c1168a | 2040 | } |
f3bff0eb LP |
2041 | } |
2042 | ||
ff502445 | 2043 | static void unit_check_binds_to(Unit *u) { |
4afd3348 | 2044 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
ff502445 LP |
2045 | bool stop = false; |
2046 | Unit *other; | |
2047 | Iterator i; | |
eef85c4a | 2048 | void *v; |
67bfdc97 | 2049 | int r; |
ff502445 LP |
2050 | |
2051 | assert(u); | |
2052 | ||
2053 | if (u->job) | |
2054 | return; | |
2055 | ||
2056 | if (unit_active_state(u) != UNIT_ACTIVE) | |
2057 | return; | |
2058 | ||
eef85c4a | 2059 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) { |
ff502445 LP |
2060 | if (other->job) |
2061 | continue; | |
13ddc3fc ZJS |
2062 | |
2063 | if (!other->coldplugged) | |
2064 | /* We might yet create a job for the other unit… */ | |
2065 | continue; | |
ff502445 LP |
2066 | |
2067 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
2068 | continue; | |
2069 | ||
2070 | stop = true; | |
98f738b6 | 2071 | break; |
ff502445 LP |
2072 | } |
2073 | ||
2074 | if (!stop) | |
2075 | return; | |
2076 | ||
595bfe7d | 2077 | /* If stopping a unit fails continuously we might enter a stop |
67bfdc97 LP |
2078 | * loop here, hence stop acting on the service being |
2079 | * unnecessary after a while. */ | |
7994ac1d | 2080 | if (!ratelimit_below(&u->auto_stop_ratelimit)) { |
67bfdc97 LP |
2081 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); |
2082 | return; | |
2083 | } | |
2084 | ||
98f738b6 | 2085 | assert(other); |
f2341e0a | 2086 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
2087 | |
2088 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
4bd29fe5 | 2089 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
67bfdc97 | 2090 | if (r < 0) |
4bd29fe5 | 2091 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
ff502445 LP |
2092 | } |
2093 | ||
87f0e418 LP |
2094 | static void retroactively_start_dependencies(Unit *u) { |
2095 | Iterator i; | |
2096 | Unit *other; | |
eef85c4a | 2097 | void *v; |
87f0e418 LP |
2098 | |
2099 | assert(u); | |
2100 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2101 | ||
eef85c4a LP |
2102 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUIRES], i) |
2103 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2104 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2105 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
b81884e7 | 2106 | |
eef85c4a LP |
2107 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) |
2108 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2109 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2110 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
87f0e418 | 2111 | |
eef85c4a LP |
2112 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_WANTS], i) |
2113 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2114 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2115 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL); |
87f0e418 | 2116 | |
eef85c4a | 2117 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 2118 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2119 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
69dd2852 | 2120 | |
eef85c4a | 2121 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 2122 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2123 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
87f0e418 LP |
2124 | } |
2125 | ||
2126 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 | 2127 | Unit *other; |
eef85c4a LP |
2128 | Iterator i; |
2129 | void *v; | |
87f0e418 LP |
2130 | |
2131 | assert(u); | |
2132 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2133 | ||
b81884e7 | 2134 | /* Pull down units which are bound to us recursively if enabled */ |
eef85c4a | 2135 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 2136 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2137 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
cd0504d0 MS |
2138 | } |
2139 | ||
3ecaa09b | 2140 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
2141 | Unit *other; |
2142 | Iterator i; | |
eef85c4a | 2143 | void *v; |
7f66b026 | 2144 | int r; |
c0daa706 LP |
2145 | |
2146 | assert(u); | |
2147 | ||
eef85c4a | 2148 | if (hashmap_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
2149 | return; |
2150 | ||
f2341e0a | 2151 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 2152 | |
eef85c4a | 2153 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_ON_FAILURE], i) { |
7f66b026 | 2154 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
222ae6a8 | 2155 | |
7f66b026 | 2156 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, &error, NULL); |
c1b6628d | 2157 | if (r < 0) |
7f66b026 | 2158 | log_unit_warning_errno(u, r, "Failed to enqueue OnFailure= job, ignoring: %s", bus_error_message(&error, r)); |
222ae6a8 | 2159 | } |
c0daa706 LP |
2160 | } |
2161 | ||
3ecaa09b LP |
2162 | void unit_trigger_notify(Unit *u) { |
2163 | Unit *other; | |
2164 | Iterator i; | |
eef85c4a | 2165 | void *v; |
3ecaa09b LP |
2166 | |
2167 | assert(u); | |
2168 | ||
eef85c4a | 2169 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_TRIGGERED_BY], i) |
3ecaa09b LP |
2170 | if (UNIT_VTABLE(other)->trigger_notify) |
2171 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2172 | } | |
2173 | ||
915b1d01 LP |
2174 | static int unit_log_resources(Unit *u) { |
2175 | ||
2176 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + 4]; | |
2177 | size_t n_message_parts = 0, n_iovec = 0; | |
2178 | char* message_parts[3 + 1], *t; | |
2179 | nsec_t nsec = NSEC_INFINITY; | |
2180 | CGroupIPAccountingMetric m; | |
2181 | size_t i; | |
2182 | int r; | |
2183 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2184 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2185 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2186 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2187 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2188 | }; | |
2189 | ||
2190 | assert(u); | |
2191 | ||
2192 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2193 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2194 | * information and the complete data in structured fields. */ | |
2195 | ||
2196 | (void) unit_get_cpu_usage(u, &nsec); | |
2197 | if (nsec != NSEC_INFINITY) { | |
2198 | char buf[FORMAT_TIMESPAN_MAX] = ""; | |
2199 | ||
2200 | /* Format the CPU time for inclusion in the structured log message */ | |
2201 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2202 | r = log_oom(); | |
2203 | goto finish; | |
2204 | } | |
2205 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2206 | ||
2207 | /* Format the CPU time for inclusion in the human language message string */ | |
2208 | format_timespan(buf, sizeof(buf), nsec / NSEC_PER_USEC, USEC_PER_MSEC); | |
2209 | t = strjoin(n_message_parts > 0 ? "consumed " : "Consumed ", buf, " CPU time"); | |
2210 | if (!t) { | |
2211 | r = log_oom(); | |
2212 | goto finish; | |
2213 | } | |
2214 | ||
2215 | message_parts[n_message_parts++] = t; | |
2216 | } | |
2217 | ||
2218 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { | |
2219 | char buf[FORMAT_BYTES_MAX] = ""; | |
2220 | uint64_t value = UINT64_MAX; | |
2221 | ||
2222 | assert(ip_fields[m]); | |
2223 | ||
2224 | (void) unit_get_ip_accounting(u, m, &value); | |
2225 | if (value == UINT64_MAX) | |
2226 | continue; | |
2227 | ||
2228 | /* Format IP accounting data for inclusion in the structured log message */ | |
2229 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2230 | r = log_oom(); | |
2231 | goto finish; | |
2232 | } | |
2233 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2234 | ||
2235 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2236 | * bytes counters (and not for the packets counters) */ | |
2237 | if (m == CGROUP_IP_INGRESS_BYTES) | |
2238 | t = strjoin(n_message_parts > 0 ? "received " : "Received ", | |
2239 | format_bytes(buf, sizeof(buf), value), | |
2240 | " IP traffic"); | |
2241 | else if (m == CGROUP_IP_EGRESS_BYTES) | |
2242 | t = strjoin(n_message_parts > 0 ? "sent " : "Sent ", | |
2243 | format_bytes(buf, sizeof(buf), value), | |
2244 | " IP traffic"); | |
2245 | else | |
2246 | continue; | |
2247 | if (!t) { | |
2248 | r = log_oom(); | |
2249 | goto finish; | |
2250 | } | |
2251 | ||
2252 | message_parts[n_message_parts++] = t; | |
2253 | } | |
2254 | ||
2255 | /* Is there any accounting data available at all? */ | |
2256 | if (n_iovec == 0) { | |
2257 | r = 0; | |
2258 | goto finish; | |
2259 | } | |
2260 | ||
2261 | if (n_message_parts == 0) | |
2262 | t = strjoina("MESSAGE=", u->id, ": Completed"); | |
2263 | else { | |
2264 | _cleanup_free_ char *joined; | |
2265 | ||
2266 | message_parts[n_message_parts] = NULL; | |
2267 | ||
2268 | joined = strv_join(message_parts, ", "); | |
2269 | if (!joined) { | |
2270 | r = log_oom(); | |
2271 | goto finish; | |
2272 | } | |
2273 | ||
2274 | t = strjoina("MESSAGE=", u->id, ": ", joined); | |
2275 | } | |
2276 | ||
2277 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2278 | * and hence don't increase n_iovec for them */ | |
2279 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2280 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2281 | ||
2282 | t = strjoina(u->manager->unit_log_field, u->id); | |
2283 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2284 | ||
2285 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2286 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2287 | ||
2288 | log_struct_iovec(LOG_INFO, iovec, n_iovec + 4); | |
2289 | r = 0; | |
2290 | ||
2291 | finish: | |
2292 | for (i = 0; i < n_message_parts; i++) | |
2293 | free(message_parts[i]); | |
2294 | ||
2295 | for (i = 0; i < n_iovec; i++) | |
2296 | free(iovec[i].iov_base); | |
2297 | ||
2298 | return r; | |
2299 | ||
2300 | } | |
2301 | ||
adefcf28 LP |
2302 | static void unit_update_on_console(Unit *u) { |
2303 | bool b; | |
2304 | ||
2305 | assert(u); | |
2306 | ||
2307 | b = unit_needs_console(u); | |
2308 | if (u->on_console == b) | |
2309 | return; | |
2310 | ||
2311 | u->on_console = b; | |
2312 | if (b) | |
2313 | manager_ref_console(u->manager); | |
2314 | else | |
2315 | manager_unref_console(u->manager); | |
adefcf28 LP |
2316 | } |
2317 | ||
2ad2e41a | 2318 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, UnitNotifyFlags flags) { |
7e6e7b06 | 2319 | bool unexpected; |
8559b3b7 | 2320 | Manager *m; |
a096ed36 | 2321 | |
87f0e418 LP |
2322 | assert(u); |
2323 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2324 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2325 | |
8559b3b7 LP |
2326 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2327 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2328 | * remounted this function will be called too! */ | |
87f0e418 | 2329 | |
546ac4f0 MS |
2330 | m = u->manager; |
2331 | ||
f755e3b7 | 2332 | /* Update timestamps for state changes */ |
2c289ea8 | 2333 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2334 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2335 | |
bdbf9951 | 2336 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2337 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2338 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2339 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2340 | |
2341 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2342 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2343 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2344 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2345 | } |
87f0e418 | 2346 | |
865cc19a | 2347 | /* Keep track of failed units */ |
5269eb6b | 2348 | (void) manager_update_failed_units(u->manager, u, ns == UNIT_FAILED); |
f755e3b7 | 2349 | |
d3070fbd LP |
2350 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2351 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
efdb0237 | 2352 | unit_prune_cgroup(u); |
d3070fbd LP |
2353 | unit_unlink_state_files(u); |
2354 | } | |
fb385181 | 2355 | |
adefcf28 | 2356 | unit_update_on_console(u); |
7ed9f6cd | 2357 | |
ac155bb8 | 2358 | if (u->job) { |
7e6e7b06 | 2359 | unexpected = false; |
87f0e418 | 2360 | |
ac155bb8 | 2361 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
2362 | |
2363 | /* So we reached a different state for this | |
2364 | * job. Let's see if we can run it now if it | |
2365 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 2366 | job_add_to_run_queue(u->job); |
87f0e418 | 2367 | |
b410e6b9 | 2368 | /* Let's check whether this state change constitutes a |
35b8ca3a | 2369 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 2370 | * hence needs to invalidate jobs. */ |
87f0e418 | 2371 | |
ac155bb8 | 2372 | switch (u->job->type) { |
87f0e418 | 2373 | |
b410e6b9 LP |
2374 | case JOB_START: |
2375 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 2376 | |
b410e6b9 | 2377 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
833f92ad | 2378 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 2379 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 2380 | unexpected = true; |
41b02ec7 | 2381 | |
fdf20a31 | 2382 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2383 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
b410e6b9 | 2384 | } |
87f0e418 | 2385 | |
b410e6b9 | 2386 | break; |
87f0e418 | 2387 | |
b410e6b9 LP |
2388 | case JOB_RELOAD: |
2389 | case JOB_RELOAD_OR_START: | |
3282591d | 2390 | case JOB_TRY_RELOAD: |
87f0e418 | 2391 | |
ac155bb8 | 2392 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 2393 | if (ns == UNIT_ACTIVE) |
2ad2e41a | 2394 | job_finish_and_invalidate(u->job, (flags & UNIT_NOTIFY_RELOAD_FAILURE) ? JOB_FAILED : JOB_DONE, true, false); |
ec2ce0c5 | 2395 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { |
a096ed36 | 2396 | unexpected = true; |
41b02ec7 | 2397 | |
fdf20a31 | 2398 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2399 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
a096ed36 | 2400 | } |
b410e6b9 | 2401 | } |
87f0e418 | 2402 | |
b410e6b9 | 2403 | break; |
87f0e418 | 2404 | |
b410e6b9 LP |
2405 | case JOB_STOP: |
2406 | case JOB_RESTART: | |
2407 | case JOB_TRY_RESTART: | |
87f0e418 | 2408 | |
fdf20a31 | 2409 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2410 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 2411 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 2412 | unexpected = true; |
833f92ad | 2413 | job_finish_and_invalidate(u->job, JOB_FAILED, true, false); |
b410e6b9 | 2414 | } |
87f0e418 | 2415 | |
b410e6b9 | 2416 | break; |
87f0e418 | 2417 | |
b410e6b9 LP |
2418 | default: |
2419 | assert_not_reached("Job type unknown"); | |
87f0e418 | 2420 | } |
87f0e418 | 2421 | |
7e6e7b06 LP |
2422 | } else |
2423 | unexpected = true; | |
2424 | ||
2c289ea8 | 2425 | if (!MANAGER_IS_RELOADING(m)) { |
f3bff0eb | 2426 | |
bdbf9951 LP |
2427 | /* If this state change happened without being |
2428 | * requested by a job, then let's retroactively start | |
2429 | * or stop dependencies. We skip that step when | |
2430 | * deserializing, since we don't want to create any | |
2431 | * additional jobs just because something is already | |
2432 | * activated. */ | |
2433 | ||
2434 | if (unexpected) { | |
2435 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2436 | retroactively_start_dependencies(u); | |
2437 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2438 | retroactively_stop_dependencies(u); | |
2439 | } | |
5de9682c | 2440 | |
cd0504d0 | 2441 | /* stop unneeded units regardless if going down was expected or not */ |
a3c1168a | 2442 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
cd0504d0 MS |
2443 | check_unneeded_dependencies(u); |
2444 | ||
bdbf9951 | 2445 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2446 | log_unit_debug(u, "Unit entered failed state."); |
2ad2e41a LP |
2447 | |
2448 | if (!(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
2449 | unit_start_on_failure(u); | |
cd6d0a45 | 2450 | } |
e537352b | 2451 | |
256f65d0 LP |
2452 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns) && !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
2453 | /* This unit just finished starting up */ | |
3b2775c5 | 2454 | |
256f65d0 LP |
2455 | if (u->type == UNIT_SERVICE) { |
2456 | /* Write audit record if we have just finished starting up */ | |
2457 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); | |
2458 | u->in_audit = true; | |
2459 | } | |
e983b760 | 2460 | |
546ac4f0 | 2461 | manager_send_unit_plymouth(m, u); |
256f65d0 | 2462 | } |
bdbf9951 | 2463 | |
256f65d0 | 2464 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && !UNIT_IS_INACTIVE_OR_FAILED(os)) { |
915b1d01 | 2465 | /* This unit just stopped/failed. */ |
256f65d0 | 2466 | |
915b1d01 | 2467 | if (u->type == UNIT_SERVICE) { |
4927fcae | 2468 | |
256f65d0 LP |
2469 | if (u->in_audit) { |
2470 | /* Write audit record if we have just finished shutting down */ | |
2471 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); | |
2472 | u->in_audit = false; | |
2473 | } else { | |
2474 | /* Hmm, if there was no start record written write it now, so that we always | |
2475 | * have a nice pair */ | |
915b1d01 | 2476 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 2477 | |
915b1d01 LP |
2478 | if (ns == UNIT_INACTIVE) |
2479 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); | |
256f65d0 | 2480 | } |
915b1d01 | 2481 | } |
bdbf9951 | 2482 | |
915b1d01 LP |
2483 | /* Write a log message about consumed resources */ |
2484 | unit_log_resources(u); | |
cd6d0a45 | 2485 | } |
f278026d LP |
2486 | } |
2487 | ||
31dc1ca3 LP |
2488 | manager_recheck_journal(m); |
2489 | manager_recheck_dbus(m); | |
e63ebf71 | 2490 | |
3ecaa09b | 2491 | unit_trigger_notify(u); |
3b2775c5 | 2492 | |
2c289ea8 | 2493 | if (!MANAGER_IS_RELOADING(u->manager)) { |
8559b3b7 | 2494 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ |
fda09318 | 2495 | unit_submit_to_stop_when_unneeded_queue(u); |
c1e1601e | 2496 | |
8559b3b7 LP |
2497 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens when |
2498 | * something BindsTo= to a Type=oneshot unit, as these units go directly from starting to inactive, | |
ff502445 LP |
2499 | * without ever entering started.) */ |
2500 | unit_check_binds_to(u); | |
53c35a76 LP |
2501 | |
2502 | if (os != UNIT_FAILED && ns == UNIT_FAILED) | |
1710d4be ZJS |
2503 | (void) emergency_action(u->manager, u->failure_action, 0, |
2504 | u->reboot_arg, "unit failed"); | |
e7dfbb4e | 2505 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) |
1710d4be ZJS |
2506 | (void) emergency_action(u->manager, u->success_action, 0, |
2507 | u->reboot_arg, "unit succeeded"); | |
ff502445 LP |
2508 | } |
2509 | ||
c1e1601e | 2510 | unit_add_to_dbus_queue(u); |
701cc384 | 2511 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2512 | } |
2513 | ||
87f0e418 | 2514 | int unit_watch_pid(Unit *u, pid_t pid) { |
62a76913 | 2515 | int r; |
a911bb9a | 2516 | |
87f0e418 | 2517 | assert(u); |
62a76913 | 2518 | assert(pid_is_valid(pid)); |
87f0e418 | 2519 | |
62a76913 | 2520 | /* Watch a specific PID */ |
5ba6985b | 2521 | |
d5099efc | 2522 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2523 | if (r < 0) |
2524 | return r; | |
2525 | ||
62a76913 | 2526 | r = hashmap_ensure_allocated(&u->manager->watch_pids, NULL); |
a911bb9a LP |
2527 | if (r < 0) |
2528 | return r; | |
2529 | ||
62a76913 LP |
2530 | /* First try, let's add the unit keyed by "pid". */ |
2531 | r = hashmap_put(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2532 | if (r == -EEXIST) { | |
2533 | Unit **array; | |
2534 | bool found = false; | |
2535 | size_t n = 0; | |
05e343b7 | 2536 | |
62a76913 LP |
2537 | /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points |
2538 | * to an array of Units rather than just a Unit), lists us already. */ | |
a911bb9a | 2539 | |
62a76913 LP |
2540 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); |
2541 | if (array) | |
2542 | for (; array[n]; n++) | |
2543 | if (array[n] == u) | |
2544 | found = true; | |
a911bb9a | 2545 | |
62a76913 LP |
2546 | if (found) /* Found it already? if so, do nothing */ |
2547 | r = 0; | |
2548 | else { | |
2549 | Unit **new_array; | |
2550 | ||
2551 | /* Allocate a new array */ | |
2552 | new_array = new(Unit*, n + 2); | |
2553 | if (!new_array) | |
2554 | return -ENOMEM; | |
2555 | ||
2556 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2557 | new_array[n] = u; | |
2558 | new_array[n+1] = NULL; | |
2559 | ||
2560 | /* Add or replace the old array */ | |
2561 | r = hashmap_replace(u->manager->watch_pids, PID_TO_PTR(-pid), new_array); | |
2562 | if (r < 0) { | |
2563 | free(new_array); | |
2564 | return r; | |
2565 | } | |
2566 | ||
2567 | free(array); | |
2568 | } | |
2569 | } else if (r < 0) | |
2570 | return r; | |
2571 | ||
2572 | r = set_put(u->pids, PID_TO_PTR(pid)); | |
2573 | if (r < 0) | |
2574 | return r; | |
2575 | ||
2576 | return 0; | |
87f0e418 LP |
2577 | } |
2578 | ||
2579 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
62a76913 LP |
2580 | Unit **array; |
2581 | ||
87f0e418 | 2582 | assert(u); |
62a76913 LP |
2583 | assert(pid_is_valid(pid)); |
2584 | ||
2585 | /* First let's drop the unit in case it's keyed as "pid". */ | |
2586 | (void) hashmap_remove_value(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2587 | ||
2588 | /* Then, let's also drop the unit, in case it's in the array keyed by -pid */ | |
2589 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); | |
2590 | if (array) { | |
2591 | size_t n, m = 0; | |
2592 | ||
2593 | /* Let's iterate through the array, dropping our own entry */ | |
2594 | for (n = 0; array[n]; n++) | |
2595 | if (array[n] != u) | |
2596 | array[m++] = array[n]; | |
2597 | array[m] = NULL; | |
2598 | ||
2599 | if (m == 0) { | |
2600 | /* The array is now empty, remove the entire entry */ | |
2601 | assert(hashmap_remove(u->manager->watch_pids, PID_TO_PTR(-pid)) == array); | |
2602 | free(array); | |
2603 | } | |
2604 | } | |
87f0e418 | 2605 | |
fea72cc0 | 2606 | (void) set_remove(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2607 | } |
2608 | ||
bd44e61b LP |
2609 | void unit_unwatch_all_pids(Unit *u) { |
2610 | assert(u); | |
2611 | ||
2612 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2613 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2614 | |
efdb0237 | 2615 | u->pids = set_free(u->pids); |
a911bb9a LP |
2616 | } |
2617 | ||
50be4f4a LP |
2618 | static void unit_tidy_watch_pids(Unit *u) { |
2619 | pid_t except1, except2; | |
a911bb9a LP |
2620 | Iterator i; |
2621 | void *e; | |
2622 | ||
2623 | assert(u); | |
2624 | ||
2625 | /* Cleans dead PIDs from our list */ | |
2626 | ||
50be4f4a LP |
2627 | except1 = unit_main_pid(u); |
2628 | except2 = unit_control_pid(u); | |
2629 | ||
a911bb9a | 2630 | SET_FOREACH(e, u->pids, i) { |
fea72cc0 | 2631 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2632 | |
2633 | if (pid == except1 || pid == except2) | |
2634 | continue; | |
2635 | ||
9f5650ae | 2636 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2637 | unit_unwatch_pid(u, pid); |
a911bb9a | 2638 | } |
87f0e418 LP |
2639 | } |
2640 | ||
50be4f4a LP |
2641 | static int on_rewatch_pids_event(sd_event_source *s, void *userdata) { |
2642 | Unit *u = userdata; | |
2643 | ||
2644 | assert(s); | |
2645 | assert(u); | |
2646 | ||
2647 | unit_tidy_watch_pids(u); | |
2648 | unit_watch_all_pids(u); | |
2649 | ||
2650 | /* If the PID set is empty now, then let's finish this off. */ | |
2651 | unit_synthesize_cgroup_empty_event(u); | |
2652 | ||
2653 | return 0; | |
2654 | } | |
2655 | ||
2656 | int unit_enqueue_rewatch_pids(Unit *u) { | |
2657 | int r; | |
2658 | ||
2659 | assert(u); | |
2660 | ||
2661 | if (!u->cgroup_path) | |
2662 | return -ENOENT; | |
2663 | ||
2664 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
2665 | if (r < 0) | |
2666 | return r; | |
2667 | if (r > 0) /* On unified we can use proper notifications */ | |
2668 | return 0; | |
2669 | ||
2670 | /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new | |
2671 | * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it | |
2672 | * involves issuing kill(pid, 0) on all processes we watch. */ | |
2673 | ||
2674 | if (!u->rewatch_pids_event_source) { | |
2675 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
2676 | ||
2677 | r = sd_event_add_defer(u->manager->event, &s, on_rewatch_pids_event, u); | |
2678 | if (r < 0) | |
2679 | return log_error_errno(r, "Failed to allocate event source for tidying watched PIDs: %m"); | |
2680 | ||
2681 | r = sd_event_source_set_priority(s, SD_EVENT_PRIORITY_IDLE); | |
2682 | if (r < 0) | |
2683 | return log_error_errno(r, "Failed to adjust priority of event source for tidying watched PIDs: m"); | |
2684 | ||
2685 | (void) sd_event_source_set_description(s, "tidy-watch-pids"); | |
2686 | ||
2687 | u->rewatch_pids_event_source = TAKE_PTR(s); | |
2688 | } | |
2689 | ||
2690 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_ONESHOT); | |
2691 | if (r < 0) | |
2692 | return log_error_errno(r, "Failed to enable event source for tidying watched PIDs: %m"); | |
2693 | ||
2694 | return 0; | |
2695 | } | |
2696 | ||
2697 | void unit_dequeue_rewatch_pids(Unit *u) { | |
2698 | int r; | |
2699 | assert(u); | |
2700 | ||
2701 | if (!u->rewatch_pids_event_source) | |
2702 | return; | |
2703 | ||
2704 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_OFF); | |
2705 | if (r < 0) | |
2706 | log_warning_errno(r, "Failed to disable event source for tidying watched PIDs, ignoring: %m"); | |
2707 | ||
2708 | u->rewatch_pids_event_source = sd_event_source_unref(u->rewatch_pids_event_source); | |
2709 | } | |
2710 | ||
87f0e418 LP |
2711 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2712 | assert(u); | |
2713 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2714 | ||
2715 | switch (j) { | |
2716 | ||
2717 | case JOB_VERIFY_ACTIVE: | |
2718 | case JOB_START: | |
e0209d83 | 2719 | case JOB_NOP: |
f5869324 LP |
2720 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
2721 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueing | |
2722 | * jobs for it. */ | |
87f0e418 LP |
2723 | return true; |
2724 | ||
f5869324 LP |
2725 | case JOB_STOP: |
2726 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
2727 | * external events), hence it makes no sense to permit enqueing such a request either. */ | |
2728 | return !u->perpetual; | |
2729 | ||
87f0e418 LP |
2730 | case JOB_RESTART: |
2731 | case JOB_TRY_RESTART: | |
f5869324 | 2732 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
2733 | |
2734 | case JOB_RELOAD: | |
3282591d | 2735 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2736 | return unit_can_reload(u); |
2737 | ||
2738 | case JOB_RELOAD_OR_START: | |
2739 | return unit_can_reload(u) && unit_can_start(u); | |
2740 | ||
2741 | default: | |
2742 | assert_not_reached("Invalid job type"); | |
2743 | } | |
2744 | } | |
2745 | ||
f2341e0a LP |
2746 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2747 | assert(u); | |
d1fab3fe | 2748 | |
f2341e0a LP |
2749 | /* Only warn about some unit types */ |
2750 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2751 | return; | |
3f3cc397 | 2752 | |
f2341e0a LP |
2753 | if (streq_ptr(u->id, other)) |
2754 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2755 | else | |
2756 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2757 | } |
2758 | ||
eef85c4a LP |
2759 | static int unit_add_dependency_hashmap( |
2760 | Hashmap **h, | |
2761 | Unit *other, | |
2762 | UnitDependencyMask origin_mask, | |
2763 | UnitDependencyMask destination_mask) { | |
2764 | ||
2765 | UnitDependencyInfo info; | |
2766 | int r; | |
2767 | ||
2768 | assert(h); | |
2769 | assert(other); | |
2770 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2771 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2772 | assert(origin_mask > 0 || destination_mask > 0); | |
2773 | ||
2774 | r = hashmap_ensure_allocated(h, NULL); | |
2775 | if (r < 0) | |
2776 | return r; | |
2777 | ||
2778 | assert_cc(sizeof(void*) == sizeof(info)); | |
2779 | ||
2780 | info.data = hashmap_get(*h, other); | |
2781 | if (info.data) { | |
2782 | /* Entry already exists. Add in our mask. */ | |
2783 | ||
d94a24ca ZJS |
2784 | if (FLAGS_SET(origin_mask, info.origin_mask) && |
2785 | FLAGS_SET(destination_mask, info.destination_mask)) | |
eef85c4a LP |
2786 | return 0; /* NOP */ |
2787 | ||
2788 | info.origin_mask |= origin_mask; | |
2789 | info.destination_mask |= destination_mask; | |
2790 | ||
2791 | r = hashmap_update(*h, other, info.data); | |
2792 | } else { | |
2793 | info = (UnitDependencyInfo) { | |
2794 | .origin_mask = origin_mask, | |
2795 | .destination_mask = destination_mask, | |
2796 | }; | |
2797 | ||
2798 | r = hashmap_put(*h, other, info.data); | |
2799 | } | |
2800 | if (r < 0) | |
2801 | return r; | |
2802 | ||
2803 | return 1; | |
2804 | } | |
2805 | ||
2806 | int unit_add_dependency( | |
2807 | Unit *u, | |
2808 | UnitDependency d, | |
2809 | Unit *other, | |
2810 | bool add_reference, | |
2811 | UnitDependencyMask mask) { | |
87f0e418 LP |
2812 | |
2813 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2814 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 2815 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 2816 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 2817 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2818 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 2819 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 2820 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 2821 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 2822 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2823 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2824 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2825 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2826 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2827 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2828 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2829 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2830 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2831 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2832 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2833 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2834 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2835 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2836 | }; |
eef85c4a LP |
2837 | Unit *original_u = u, *original_other = other; |
2838 | int r; | |
87f0e418 LP |
2839 | |
2840 | assert(u); | |
2841 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2842 | assert(other); |
2843 | ||
9f151f29 LP |
2844 | u = unit_follow_merge(u); |
2845 | other = unit_follow_merge(other); | |
2846 | ||
87f0e418 LP |
2847 | /* We won't allow dependencies on ourselves. We will not |
2848 | * consider them an error however. */ | |
d1fab3fe | 2849 | if (u == other) { |
eef85c4a | 2850 | maybe_warn_about_dependency(original_u, original_other->id, d); |
87f0e418 | 2851 | return 0; |
d1fab3fe | 2852 | } |
87f0e418 | 2853 | |
eef85c4a LP |
2854 | if ((d == UNIT_BEFORE && other->type == UNIT_DEVICE) || |
2855 | (d == UNIT_AFTER && u->type == UNIT_DEVICE)) { | |
dd5e7000 ZJS |
2856 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
2857 | return 0; | |
2858 | } | |
2859 | ||
eef85c4a | 2860 | r = unit_add_dependency_hashmap(u->dependencies + d, other, mask, 0); |
613b411c | 2861 | if (r < 0) |
87f0e418 LP |
2862 | return r; |
2863 | ||
eef85c4a LP |
2864 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2865 | r = unit_add_dependency_hashmap(other->dependencies + inverse_table[d], u, 0, mask); | |
613b411c LP |
2866 | if (r < 0) |
2867 | return r; | |
2868 | } | |
2869 | ||
2870 | if (add_reference) { | |
eef85c4a | 2871 | r = unit_add_dependency_hashmap(u->dependencies + UNIT_REFERENCES, other, mask, 0); |
613b411c | 2872 | if (r < 0) |
5de9682c LP |
2873 | return r; |
2874 | ||
eef85c4a | 2875 | r = unit_add_dependency_hashmap(other->dependencies + UNIT_REFERENCED_BY, u, 0, mask); |
613b411c | 2876 | if (r < 0) |
701cc384 | 2877 | return r; |
613b411c | 2878 | } |
87f0e418 | 2879 | |
c1e1601e | 2880 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
2881 | return 0; |
2882 | } | |
0301abf4 | 2883 | |
eef85c4a | 2884 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
2c966c03 LP |
2885 | int r; |
2886 | ||
2887 | assert(u); | |
2888 | ||
eef85c4a | 2889 | r = unit_add_dependency(u, d, other, add_reference, mask); |
3f3cc397 | 2890 | if (r < 0) |
2c966c03 LP |
2891 | return r; |
2892 | ||
eef85c4a | 2893 | return unit_add_dependency(u, e, other, add_reference, mask); |
2c966c03 LP |
2894 | } |
2895 | ||
23e8c796 | 2896 | static int resolve_template(Unit *u, const char *name, char **buf, const char **ret) { |
7410616c | 2897 | int r; |
9e2f7c11 LP |
2898 | |
2899 | assert(u); | |
23e8c796 | 2900 | assert(name); |
7410616c LP |
2901 | assert(buf); |
2902 | assert(ret); | |
9e2f7c11 | 2903 | |
7410616c LP |
2904 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2905 | *buf = NULL; | |
2906 | *ret = name; | |
2907 | return 0; | |
9e2f7c11 LP |
2908 | } |
2909 | ||
ac155bb8 | 2910 | if (u->instance) |
7410616c | 2911 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 2912 | else { |
ae018d9b | 2913 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2914 | |
7410616c LP |
2915 | r = unit_name_to_prefix(u->id, &i); |
2916 | if (r < 0) | |
2917 | return r; | |
9e2f7c11 | 2918 | |
7410616c | 2919 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 2920 | } |
7410616c LP |
2921 | if (r < 0) |
2922 | return r; | |
9e2f7c11 | 2923 | |
7410616c LP |
2924 | *ret = *buf; |
2925 | return 0; | |
9e2f7c11 LP |
2926 | } |
2927 | ||
35d8c19a | 2928 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 2929 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
2930 | Unit *other; |
2931 | int r; | |
2932 | ||
9e2f7c11 | 2933 | assert(u); |
35d8c19a | 2934 | assert(name); |
09b6b09f | 2935 | |
23e8c796 | 2936 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
2937 | if (r < 0) |
2938 | return r; | |
09b6b09f | 2939 | |
35d8c19a | 2940 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
8afbb8e1 LP |
2941 | if (r < 0) |
2942 | return r; | |
9e2f7c11 | 2943 | |
eef85c4a | 2944 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
2945 | } |
2946 | ||
5a724170 | 2947 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 2948 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2949 | Unit *other; |
2950 | int r; | |
2c966c03 LP |
2951 | |
2952 | assert(u); | |
5a724170 | 2953 | assert(name); |
2c966c03 | 2954 | |
23e8c796 | 2955 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
2956 | if (r < 0) |
2957 | return r; | |
2c966c03 | 2958 | |
5a724170 | 2959 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
3f3cc397 | 2960 | if (r < 0) |
68eda4bd | 2961 | return r; |
2c966c03 | 2962 | |
eef85c4a | 2963 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
2964 | } |
2965 | ||
0301abf4 | 2966 | int set_unit_path(const char *p) { |
0301abf4 | 2967 | /* This is mostly for debug purposes */ |
cbe46ead | 2968 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 2969 | return -errno; |
0301abf4 LP |
2970 | |
2971 | return 0; | |
2972 | } | |
88066b3a | 2973 | |
ea430986 | 2974 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2975 | assert(u); |
2976 | ||
ac155bb8 | 2977 | if (!u->id) |
04ade7d2 LP |
2978 | return NULL; |
2979 | ||
48899192 | 2980 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2981 | } |
2982 | ||
4b58153d LP |
2983 | char *unit_dbus_path_invocation_id(Unit *u) { |
2984 | assert(u); | |
2985 | ||
2986 | if (sd_id128_is_null(u->invocation_id)) | |
2987 | return NULL; | |
2988 | ||
2989 | return unit_dbus_path_from_name(u->invocation_id_string); | |
2990 | } | |
2991 | ||
d79200e2 LP |
2992 | int unit_set_slice(Unit *u, Unit *slice) { |
2993 | assert(u); | |
2994 | assert(slice); | |
2995 | ||
2996 | /* Sets the unit slice if it has not been set before. Is extra | |
2997 | * careful, to only allow this for units that actually have a | |
2998 | * cgroup context. Also, we don't allow to set this for slices | |
2999 | * (since the parent slice is derived from the name). Make | |
3000 | * sure the unit we set is actually a slice. */ | |
3001 | ||
3002 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3003 | return -EOPNOTSUPP; | |
3004 | ||
3005 | if (u->type == UNIT_SLICE) | |
3006 | return -EINVAL; | |
3007 | ||
102ef982 LP |
3008 | if (unit_active_state(u) != UNIT_INACTIVE) |
3009 | return -EBUSY; | |
3010 | ||
d79200e2 LP |
3011 | if (slice->type != UNIT_SLICE) |
3012 | return -EINVAL; | |
3013 | ||
efdb0237 LP |
3014 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
3015 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
3016 | return -EPERM; | |
3017 | ||
d79200e2 LP |
3018 | if (UNIT_DEREF(u->slice) == slice) |
3019 | return 0; | |
3020 | ||
99e66921 TH |
3021 | /* Disallow slice changes if @u is already bound to cgroups */ |
3022 | if (UNIT_ISSET(u->slice) && u->cgroup_realized) | |
d79200e2 LP |
3023 | return -EBUSY; |
3024 | ||
7f7d01ed | 3025 | unit_ref_set(&u->slice, u, slice); |
d79200e2 LP |
3026 | return 1; |
3027 | } | |
3028 | ||
3029 | int unit_set_default_slice(Unit *u) { | |
a8833944 LP |
3030 | _cleanup_free_ char *b = NULL; |
3031 | const char *slice_name; | |
a016b922 LP |
3032 | Unit *slice; |
3033 | int r; | |
3034 | ||
3035 | assert(u); | |
3036 | ||
9444b1f2 | 3037 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
3038 | return 0; |
3039 | ||
a8833944 LP |
3040 | if (u->instance) { |
3041 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 3042 | |
a8833944 LP |
3043 | /* Implicitly place all instantiated units in their |
3044 | * own per-template slice */ | |
3045 | ||
7410616c LP |
3046 | r = unit_name_to_prefix(u->id, &prefix); |
3047 | if (r < 0) | |
3048 | return r; | |
a8833944 LP |
3049 | |
3050 | /* The prefix is already escaped, but it might include | |
3051 | * "-" which has a special meaning for slice units, | |
3052 | * hence escape it here extra. */ | |
7410616c | 3053 | escaped = unit_name_escape(prefix); |
a8833944 LP |
3054 | if (!escaped) |
3055 | return -ENOMEM; | |
3056 | ||
463d0d15 | 3057 | if (MANAGER_IS_SYSTEM(u->manager)) |
605405c6 | 3058 | b = strjoin("system-", escaped, ".slice"); |
a8833944 LP |
3059 | else |
3060 | b = strappend(escaped, ".slice"); | |
3061 | if (!b) | |
3062 | return -ENOMEM; | |
3063 | ||
3064 | slice_name = b; | |
3065 | } else | |
3066 | slice_name = | |
463d0d15 | 3067 | MANAGER_IS_SYSTEM(u->manager) && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
3068 | ? SPECIAL_SYSTEM_SLICE |
3069 | : SPECIAL_ROOT_SLICE; | |
3070 | ||
3071 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
3072 | if (r < 0) |
3073 | return r; | |
3074 | ||
d79200e2 | 3075 | return unit_set_slice(u, slice); |
a016b922 LP |
3076 | } |
3077 | ||
9444b1f2 LP |
3078 | const char *unit_slice_name(Unit *u) { |
3079 | assert(u); | |
3080 | ||
3081 | if (!UNIT_ISSET(u->slice)) | |
3082 | return NULL; | |
3083 | ||
3084 | return UNIT_DEREF(u->slice)->id; | |
3085 | } | |
3086 | ||
f6ff8c29 | 3087 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 3088 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
3089 | int r; |
3090 | ||
3091 | assert(u); | |
3092 | assert(type); | |
3093 | assert(_found); | |
3094 | ||
7410616c LP |
3095 | r = unit_name_change_suffix(u->id, type, &t); |
3096 | if (r < 0) | |
3097 | return r; | |
3098 | if (unit_has_name(u, t)) | |
3099 | return -EINVAL; | |
f6ff8c29 | 3100 | |
ac155bb8 | 3101 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3102 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3103 | return r; |
3104 | } | |
3105 | ||
bbc29086 DM |
3106 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
3107 | const char *name, *old_owner, *new_owner; | |
3108 | Unit *u = userdata; | |
3109 | int r; | |
3110 | ||
3111 | assert(message); | |
3112 | assert(u); | |
3113 | ||
3114 | r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner); | |
3115 | if (r < 0) { | |
3116 | bus_log_parse_error(r); | |
3117 | return 0; | |
3118 | } | |
3119 | ||
a8ea93a5 LP |
3120 | old_owner = empty_to_null(old_owner); |
3121 | new_owner = empty_to_null(new_owner); | |
b0076268 | 3122 | |
bbc29086 DM |
3123 | if (UNIT_VTABLE(u)->bus_name_owner_change) |
3124 | UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); | |
3125 | ||
3126 | return 0; | |
3127 | } | |
3128 | ||
9806e87d LP |
3129 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3130 | const char *match; | |
bbc29086 | 3131 | |
9806e87d LP |
3132 | assert(u); |
3133 | assert(bus); | |
3134 | assert(name); | |
bbc29086 DM |
3135 | |
3136 | if (u->match_bus_slot) | |
3137 | return -EBUSY; | |
3138 | ||
9806e87d | 3139 | match = strjoina("type='signal'," |
81d62103 ZJS |
3140 | "sender='org.freedesktop.DBus'," |
3141 | "path='/org/freedesktop/DBus'," | |
3142 | "interface='org.freedesktop.DBus'," | |
3143 | "member='NameOwnerChanged'," | |
3144 | "arg0='", name, "'"); | |
bbc29086 | 3145 | |
75152a4d | 3146 | return sd_bus_add_match_async(bus, &u->match_bus_slot, match, signal_name_owner_changed, NULL, u); |
bbc29086 DM |
3147 | } |
3148 | ||
05e343b7 | 3149 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3150 | int r; |
3151 | ||
05e343b7 LP |
3152 | assert(u); |
3153 | assert(name); | |
3154 | ||
3155 | /* Watch a specific name on the bus. We only support one unit | |
3156 | * watching each name for now. */ | |
3157 | ||
bbc29086 DM |
3158 | if (u->manager->api_bus) { |
3159 | /* If the bus is already available, install the match directly. | |
3160 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3161 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3162 | if (r < 0) |
8ea823b6 | 3163 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3164 | } |
3165 | ||
3166 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3167 | if (r < 0) { | |
3168 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3169 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); | |
3170 | } | |
3171 | ||
3172 | return 0; | |
05e343b7 LP |
3173 | } |
3174 | ||
3175 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3176 | assert(u); | |
3177 | assert(name); | |
3178 | ||
8367fea5 | 3179 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3180 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
05e343b7 LP |
3181 | } |
3182 | ||
a16e1123 LP |
3183 | bool unit_can_serialize(Unit *u) { |
3184 | assert(u); | |
3185 | ||
3186 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
3187 | } | |
3188 | ||
8b108bd0 FB |
3189 | static int unit_serialize_cgroup_mask(FILE *f, const char *key, CGroupMask mask) { |
3190 | _cleanup_free_ char *s = NULL; | |
3191 | int r = 0; | |
3192 | ||
3193 | assert(f); | |
3194 | assert(key); | |
3195 | ||
3196 | if (mask != 0) { | |
3197 | r = cg_mask_to_string(mask, &s); | |
3198 | if (r >= 0) { | |
3199 | fputs(key, f); | |
3200 | fputc('=', f); | |
3201 | fputs(s, f); | |
3202 | fputc('\n', f); | |
3203 | } | |
3204 | } | |
3205 | return r; | |
3206 | } | |
3207 | ||
6b659ed8 LP |
3208 | static const char *ip_accounting_metric_field[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { |
3209 | [CGROUP_IP_INGRESS_BYTES] = "ip-accounting-ingress-bytes", | |
3210 | [CGROUP_IP_INGRESS_PACKETS] = "ip-accounting-ingress-packets", | |
3211 | [CGROUP_IP_EGRESS_BYTES] = "ip-accounting-egress-bytes", | |
3212 | [CGROUP_IP_EGRESS_PACKETS] = "ip-accounting-egress-packets", | |
3213 | }; | |
3214 | ||
6b78f9b4 | 3215 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
6b659ed8 | 3216 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3217 | int r; |
3218 | ||
3219 | assert(u); | |
3220 | assert(f); | |
3221 | assert(fds); | |
3222 | ||
9bdb98c5 | 3223 | if (unit_can_serialize(u)) { |
9bdb98c5 | 3224 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
3225 | if (r < 0) |
3226 | return r; | |
e0209d83 MS |
3227 | } |
3228 | ||
a483fb59 LP |
3229 | dual_timestamp_serialize(f, "state-change-timestamp", &u->state_change_timestamp); |
3230 | ||
ac155bb8 MS |
3231 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
3232 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
3233 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
3234 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
a483fb59 | 3235 | |
ac155bb8 | 3236 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); |
59fccdc5 | 3237 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 3238 | |
ac155bb8 MS |
3239 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
3240 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 3241 | |
59fccdc5 LP |
3242 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
3243 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
3244 | ||
c2756a68 | 3245 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
fe700f46 | 3246 | |
0e699122 LP |
3247 | unit_serialize_item(u, f, "in-audit", yes_no(u->in_audit)); |
3248 | ||
d3070fbd LP |
3249 | unit_serialize_item(u, f, "exported-invocation-id", yes_no(u->exported_invocation_id)); |
3250 | unit_serialize_item(u, f, "exported-log-level-max", yes_no(u->exported_log_level_max)); | |
3251 | unit_serialize_item(u, f, "exported-log-extra-fields", yes_no(u->exported_log_extra_fields)); | |
3252 | ||
66ebf6c0 | 3253 | unit_serialize_item_format(u, f, "cpu-usage-base", "%" PRIu64, u->cpu_usage_base); |
fe700f46 LP |
3254 | if (u->cpu_usage_last != NSEC_INFINITY) |
3255 | unit_serialize_item_format(u, f, "cpu-usage-last", "%" PRIu64, u->cpu_usage_last); | |
c2756a68 LP |
3256 | |
3257 | if (u->cgroup_path) | |
3258 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
de1d4f9b | 3259 | unit_serialize_item(u, f, "cgroup-realized", yes_no(u->cgroup_realized)); |
8b108bd0 FB |
3260 | (void) unit_serialize_cgroup_mask(f, "cgroup-realized-mask", u->cgroup_realized_mask); |
3261 | (void) unit_serialize_cgroup_mask(f, "cgroup-enabled-mask", u->cgroup_enabled_mask); | |
17f14955 | 3262 | (void) unit_serialize_cgroup_mask(f, "cgroup-invalidated-mask", u->cgroup_invalidated_mask); |
c2756a68 | 3263 | |
00d9ef85 LP |
3264 | if (uid_is_valid(u->ref_uid)) |
3265 | unit_serialize_item_format(u, f, "ref-uid", UID_FMT, u->ref_uid); | |
3266 | if (gid_is_valid(u->ref_gid)) | |
3267 | unit_serialize_item_format(u, f, "ref-gid", GID_FMT, u->ref_gid); | |
3268 | ||
4b58153d LP |
3269 | if (!sd_id128_is_null(u->invocation_id)) |
3270 | unit_serialize_item_format(u, f, "invocation-id", SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
3271 | ||
05a98afd LP |
3272 | bus_track_serialize(u->bus_track, f, "ref"); |
3273 | ||
6b659ed8 LP |
3274 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
3275 | uint64_t v; | |
3276 | ||
3277 | r = unit_get_ip_accounting(u, m, &v); | |
3278 | if (r >= 0) | |
3279 | unit_serialize_item_format(u, f, ip_accounting_metric_field[m], "%" PRIu64, v); | |
3280 | } | |
3281 | ||
613b411c LP |
3282 | if (serialize_jobs) { |
3283 | if (u->job) { | |
3284 | fprintf(f, "job\n"); | |
05a98afd | 3285 | job_serialize(u->job, f); |
613b411c LP |
3286 | } |
3287 | ||
3288 | if (u->nop_job) { | |
3289 | fprintf(f, "job\n"); | |
05a98afd | 3290 | job_serialize(u->nop_job, f); |
613b411c LP |
3291 | } |
3292 | } | |
3293 | ||
a16e1123 LP |
3294 | /* End marker */ |
3295 | fputc('\n', f); | |
3296 | return 0; | |
3297 | } | |
3298 | ||
a34ceba6 LP |
3299 | int unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { |
3300 | assert(u); | |
3301 | assert(f); | |
3302 | assert(key); | |
3303 | ||
3304 | if (!value) | |
3305 | return 0; | |
3306 | ||
3307 | fputs(key, f); | |
3308 | fputc('=', f); | |
3309 | fputs(value, f); | |
3310 | fputc('\n', f); | |
3311 | ||
3312 | return 1; | |
3313 | } | |
3314 | ||
3315 | int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *value) { | |
3316 | _cleanup_free_ char *c = NULL; | |
3317 | ||
3318 | assert(u); | |
3319 | assert(f); | |
3320 | assert(key); | |
3321 | ||
3322 | if (!value) | |
3323 | return 0; | |
3324 | ||
3325 | c = cescape(value); | |
3326 | if (!c) | |
3327 | return -ENOMEM; | |
3328 | ||
3329 | fputs(key, f); | |
3330 | fputc('=', f); | |
3331 | fputs(c, f); | |
3332 | fputc('\n', f); | |
3333 | ||
3334 | return 1; | |
3335 | } | |
3336 | ||
3337 | int unit_serialize_item_fd(Unit *u, FILE *f, FDSet *fds, const char *key, int fd) { | |
3338 | int copy; | |
3339 | ||
3340 | assert(u); | |
3341 | assert(f); | |
3342 | assert(key); | |
3343 | ||
3344 | if (fd < 0) | |
3345 | return 0; | |
3346 | ||
3347 | copy = fdset_put_dup(fds, fd); | |
3348 | if (copy < 0) | |
3349 | return copy; | |
3350 | ||
3351 | fprintf(f, "%s=%i\n", key, copy); | |
3352 | return 1; | |
3353 | } | |
3354 | ||
a16e1123 LP |
3355 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { |
3356 | va_list ap; | |
3357 | ||
3358 | assert(u); | |
3359 | assert(f); | |
3360 | assert(key); | |
3361 | assert(format); | |
3362 | ||
3363 | fputs(key, f); | |
3364 | fputc('=', f); | |
3365 | ||
3366 | va_start(ap, format); | |
3367 | vfprintf(f, format, ap); | |
3368 | va_end(ap); | |
3369 | ||
3370 | fputc('\n', f); | |
3371 | } | |
3372 | ||
a16e1123 LP |
3373 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
3374 | int r; | |
3375 | ||
3376 | assert(u); | |
3377 | assert(f); | |
3378 | assert(fds); | |
3379 | ||
a16e1123 | 3380 | for (;;) { |
20c03b7b | 3381 | char line[LINE_MAX], *l, *v; |
6b659ed8 | 3382 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3383 | size_t k; |
3384 | ||
3385 | if (!fgets(line, sizeof(line), f)) { | |
3386 | if (feof(f)) | |
3387 | return 0; | |
3388 | return -errno; | |
3389 | } | |
3390 | ||
10f8e83c | 3391 | char_array_0(line); |
a16e1123 LP |
3392 | l = strstrip(line); |
3393 | ||
3394 | /* End marker */ | |
e911de99 | 3395 | if (isempty(l)) |
a483fb59 | 3396 | break; |
a16e1123 LP |
3397 | |
3398 | k = strcspn(l, "="); | |
3399 | ||
3400 | if (l[k] == '=') { | |
3401 | l[k] = 0; | |
3402 | v = l+k+1; | |
3403 | } else | |
3404 | v = l+k; | |
3405 | ||
cca098b0 | 3406 | if (streq(l, "job")) { |
39a18c60 MS |
3407 | if (v[0] == '\0') { |
3408 | /* new-style serialized job */ | |
9c3349e2 LP |
3409 | Job *j; |
3410 | ||
3411 | j = job_new_raw(u); | |
39a18c60 | 3412 | if (!j) |
e911de99 | 3413 | return log_oom(); |
39a18c60 | 3414 | |
05a98afd | 3415 | r = job_deserialize(j, f); |
39a18c60 MS |
3416 | if (r < 0) { |
3417 | job_free(j); | |
3418 | return r; | |
3419 | } | |
cca098b0 | 3420 | |
39a18c60 MS |
3421 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
3422 | if (r < 0) { | |
3423 | job_free(j); | |
3424 | return r; | |
3425 | } | |
e0209d83 MS |
3426 | |
3427 | r = job_install_deserialized(j); | |
3428 | if (r < 0) { | |
3429 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
3430 | job_free(j); | |
3431 | return r; | |
3432 | } | |
ed10fa8c LP |
3433 | } else /* legacy for pre-44 */ |
3434 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); | |
cca098b0 | 3435 | continue; |
a483fb59 LP |
3436 | } else if (streq(l, "state-change-timestamp")) { |
3437 | dual_timestamp_deserialize(v, &u->state_change_timestamp); | |
3438 | continue; | |
8aaf019b | 3439 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 3440 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
3441 | continue; |
3442 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 3443 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
3444 | continue; |
3445 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 3446 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
3447 | continue; |
3448 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 3449 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 3450 | continue; |
2791a8f8 | 3451 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 3452 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 3453 | continue; |
59fccdc5 LP |
3454 | } else if (streq(l, "assert-timestamp")) { |
3455 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
3456 | continue; | |
2791a8f8 | 3457 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 3458 | |
e911de99 LP |
3459 | r = parse_boolean(v); |
3460 | if (r < 0) | |
f2341e0a | 3461 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 3462 | else |
e911de99 | 3463 | u->condition_result = r; |
efbac6d2 LP |
3464 | |
3465 | continue; | |
c2756a68 | 3466 | |
59fccdc5 | 3467 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 3468 | |
e911de99 LP |
3469 | r = parse_boolean(v); |
3470 | if (r < 0) | |
f2341e0a | 3471 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 3472 | else |
e911de99 | 3473 | u->assert_result = r; |
59fccdc5 LP |
3474 | |
3475 | continue; | |
3476 | ||
c2756a68 | 3477 | } else if (streq(l, "transient")) { |
c2756a68 | 3478 | |
e911de99 LP |
3479 | r = parse_boolean(v); |
3480 | if (r < 0) | |
f2341e0a | 3481 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 3482 | else |
e911de99 | 3483 | u->transient = r; |
c2756a68 LP |
3484 | |
3485 | continue; | |
e911de99 | 3486 | |
0e699122 LP |
3487 | } else if (streq(l, "in-audit")) { |
3488 | ||
3489 | r = parse_boolean(v); | |
3490 | if (r < 0) | |
3491 | log_unit_debug(u, "Failed to parse in-audit bool %s, ignoring.", v); | |
3492 | else | |
3493 | u->in_audit = r; | |
3494 | ||
3495 | continue; | |
3496 | ||
d3070fbd LP |
3497 | } else if (streq(l, "exported-invocation-id")) { |
3498 | ||
3499 | r = parse_boolean(v); | |
3500 | if (r < 0) | |
3501 | log_unit_debug(u, "Failed to parse exported invocation ID bool %s, ignoring.", v); | |
3502 | else | |
3503 | u->exported_invocation_id = r; | |
3504 | ||
3505 | continue; | |
3506 | ||
3507 | } else if (streq(l, "exported-log-level-max")) { | |
3508 | ||
3509 | r = parse_boolean(v); | |
3510 | if (r < 0) | |
3511 | log_unit_debug(u, "Failed to parse exported log level max bool %s, ignoring.", v); | |
3512 | else | |
3513 | u->exported_log_level_max = r; | |
3514 | ||
3515 | continue; | |
3516 | ||
3517 | } else if (streq(l, "exported-log-extra-fields")) { | |
3518 | ||
3519 | r = parse_boolean(v); | |
3520 | if (r < 0) | |
3521 | log_unit_debug(u, "Failed to parse exported log extra fields bool %s, ignoring.", v); | |
3522 | else | |
3523 | u->exported_log_extra_fields = r; | |
3524 | ||
3525 | continue; | |
3526 | ||
fe700f46 | 3527 | } else if (STR_IN_SET(l, "cpu-usage-base", "cpuacct-usage-base")) { |
5ad096b3 | 3528 | |
66ebf6c0 | 3529 | r = safe_atou64(v, &u->cpu_usage_base); |
5ad096b3 | 3530 | if (r < 0) |
fe700f46 LP |
3531 | log_unit_debug(u, "Failed to parse CPU usage base %s, ignoring.", v); |
3532 | ||
3533 | continue; | |
3534 | ||
3535 | } else if (streq(l, "cpu-usage-last")) { | |
3536 | ||
3537 | r = safe_atou64(v, &u->cpu_usage_last); | |
3538 | if (r < 0) | |
3539 | log_unit_debug(u, "Failed to read CPU usage last %s, ignoring.", v); | |
5ad096b3 | 3540 | |
0f908397 | 3541 | continue; |
4e595329 | 3542 | |
e911de99 | 3543 | } else if (streq(l, "cgroup")) { |
72673e86 | 3544 | |
e911de99 LP |
3545 | r = unit_set_cgroup_path(u, v); |
3546 | if (r < 0) | |
f2341e0a | 3547 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 3548 | |
efdb0237 LP |
3549 | (void) unit_watch_cgroup(u); |
3550 | ||
de1d4f9b WF |
3551 | continue; |
3552 | } else if (streq(l, "cgroup-realized")) { | |
3553 | int b; | |
3554 | ||
3555 | b = parse_boolean(v); | |
3556 | if (b < 0) | |
3557 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
3558 | else | |
3559 | u->cgroup_realized = b; | |
3560 | ||
c2756a68 | 3561 | continue; |
00d9ef85 | 3562 | |
8b108bd0 FB |
3563 | } else if (streq(l, "cgroup-realized-mask")) { |
3564 | ||
3565 | r = cg_mask_from_string(v, &u->cgroup_realized_mask); | |
3566 | if (r < 0) | |
3567 | log_unit_debug(u, "Failed to parse cgroup-realized-mask %s, ignoring.", v); | |
3568 | continue; | |
3569 | ||
3570 | } else if (streq(l, "cgroup-enabled-mask")) { | |
3571 | ||
3572 | r = cg_mask_from_string(v, &u->cgroup_enabled_mask); | |
3573 | if (r < 0) | |
3574 | log_unit_debug(u, "Failed to parse cgroup-enabled-mask %s, ignoring.", v); | |
3575 | continue; | |
3576 | ||
17f14955 | 3577 | } else if (streq(l, "cgroup-invalidated-mask")) { |
906c06f6 | 3578 | |
17f14955 | 3579 | r = cg_mask_from_string(v, &u->cgroup_invalidated_mask); |
906c06f6 | 3580 | if (r < 0) |
17f14955 | 3581 | log_unit_debug(u, "Failed to parse cgroup-invalidated-mask %s, ignoring.", v); |
906c06f6 DM |
3582 | continue; |
3583 | ||
00d9ef85 LP |
3584 | } else if (streq(l, "ref-uid")) { |
3585 | uid_t uid; | |
3586 | ||
3587 | r = parse_uid(v, &uid); | |
3588 | if (r < 0) | |
3589 | log_unit_debug(u, "Failed to parse referenced UID %s, ignoring.", v); | |
3590 | else | |
3591 | unit_ref_uid_gid(u, uid, GID_INVALID); | |
3592 | ||
3593 | continue; | |
3594 | ||
3595 | } else if (streq(l, "ref-gid")) { | |
3596 | gid_t gid; | |
3597 | ||
3598 | r = parse_gid(v, &gid); | |
3599 | if (r < 0) | |
3600 | log_unit_debug(u, "Failed to parse referenced GID %s, ignoring.", v); | |
3601 | else | |
3602 | unit_ref_uid_gid(u, UID_INVALID, gid); | |
3603 | ||
5f616d5f LP |
3604 | continue; |
3605 | ||
05a98afd LP |
3606 | } else if (streq(l, "ref")) { |
3607 | ||
3608 | r = strv_extend(&u->deserialized_refs, v); | |
3609 | if (r < 0) | |
3610 | log_oom(); | |
3611 | ||
4b58153d LP |
3612 | continue; |
3613 | } else if (streq(l, "invocation-id")) { | |
3614 | sd_id128_t id; | |
3615 | ||
3616 | r = sd_id128_from_string(v, &id); | |
3617 | if (r < 0) | |
3618 | log_unit_debug(u, "Failed to parse invocation id %s, ignoring.", v); | |
3619 | else { | |
3620 | r = unit_set_invocation_id(u, id); | |
3621 | if (r < 0) | |
3622 | log_unit_warning_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
3623 | } | |
3624 | ||
00d9ef85 | 3625 | continue; |
8aaf019b | 3626 | } |
cca098b0 | 3627 | |
6b659ed8 LP |
3628 | /* Check if this is an IP accounting metric serialization field */ |
3629 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) | |
3630 | if (streq(l, ip_accounting_metric_field[m])) | |
3631 | break; | |
3632 | if (m < _CGROUP_IP_ACCOUNTING_METRIC_MAX) { | |
3633 | uint64_t c; | |
3634 | ||
3635 | r = safe_atou64(v, &c); | |
3636 | if (r < 0) | |
3637 | log_unit_debug(u, "Failed to parse IP accounting value %s, ignoring.", v); | |
3638 | else | |
3639 | u->ip_accounting_extra[m] = c; | |
3640 | continue; | |
3641 | } | |
3642 | ||
9bdb98c5 | 3643 | if (unit_can_serialize(u)) { |
e8a565cb YW |
3644 | r = exec_runtime_deserialize_compat(u, l, v, fds); |
3645 | if (r < 0) { | |
3646 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); | |
3647 | continue; | |
9bdb98c5 LP |
3648 | } |
3649 | ||
e8a565cb YW |
3650 | /* Returns positive if key was handled by the call */ |
3651 | if (r > 0) | |
3652 | continue; | |
3653 | ||
9bdb98c5 | 3654 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); |
613b411c | 3655 | if (r < 0) |
f2341e0a | 3656 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 3657 | } |
a16e1123 | 3658 | } |
a483fb59 LP |
3659 | |
3660 | /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is | |
3661 | * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from | |
1f133e0d | 3662 | * before 228 where the base for timeouts was not persistent across reboots. */ |
a483fb59 LP |
3663 | |
3664 | if (!dual_timestamp_is_set(&u->state_change_timestamp)) | |
3665 | dual_timestamp_get(&u->state_change_timestamp); | |
3666 | ||
58d83430 LP |
3667 | /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied |
3668 | * after we are done. For that we invalidate anything already realized, so that we can realize it again. */ | |
3669 | unit_invalidate_cgroup(u, _CGROUP_MASK_ALL); | |
3670 | unit_invalidate_cgroup_bpf(u); | |
3671 | ||
a483fb59 | 3672 | return 0; |
a16e1123 LP |
3673 | } |
3674 | ||
07429866 ZJS |
3675 | void unit_deserialize_skip(FILE *f) { |
3676 | assert(f); | |
3677 | ||
3678 | /* Skip serialized data for this unit. We don't know what it is. */ | |
3679 | ||
3680 | for (;;) { | |
3681 | char line[LINE_MAX], *l; | |
3682 | ||
3683 | if (!fgets(line, sizeof line, f)) | |
3684 | return; | |
3685 | ||
3686 | char_array_0(line); | |
3687 | l = strstrip(line); | |
3688 | ||
3689 | /* End marker */ | |
3690 | if (isempty(l)) | |
3691 | return; | |
3692 | } | |
3693 | } | |
3694 | ||
eef85c4a | 3695 | int unit_add_node_dependency(Unit *u, const char *what, bool wants, UnitDependency dep, UnitDependencyMask mask) { |
6e2ef85b | 3696 | Unit *device; |
68eda4bd | 3697 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
3698 | int r; |
3699 | ||
3700 | assert(u); | |
3701 | ||
6e2ef85b | 3702 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3703 | if (isempty(what)) |
3704 | return 0; | |
6e2ef85b | 3705 | |
8407a5d0 | 3706 | if (!is_device_path(what)) |
6e2ef85b LP |
3707 | return 0; |
3708 | ||
47bc12e1 LP |
3709 | /* When device units aren't supported (such as in a |
3710 | * container), don't create dependencies on them. */ | |
1c2e9646 | 3711 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3712 | return 0; |
3713 | ||
7410616c LP |
3714 | r = unit_name_from_path(what, ".device", &e); |
3715 | if (r < 0) | |
3716 | return r; | |
6e2ef85b | 3717 | |
ac155bb8 | 3718 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3719 | if (r < 0) |
3720 | return r; | |
3721 | ||
ebc8968b FB |
3722 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3723 | dep = UNIT_BINDS_TO; | |
3724 | ||
9d06297e | 3725 | r = unit_add_two_dependencies(u, UNIT_AFTER, |
463d0d15 | 3726 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, |
eef85c4a | 3727 | device, true, mask); |
faa368e3 | 3728 | if (r < 0) |
6e2ef85b LP |
3729 | return r; |
3730 | ||
faa368e3 | 3731 | if (wants) { |
eef85c4a | 3732 | r = unit_add_dependency(device, UNIT_WANTS, u, false, mask); |
faa368e3 | 3733 | if (r < 0) |
6e2ef85b | 3734 | return r; |
faa368e3 | 3735 | } |
6e2ef85b LP |
3736 | |
3737 | return 0; | |
3738 | } | |
a16e1123 | 3739 | |
be847e82 | 3740 | int unit_coldplug(Unit *u) { |
05a98afd LP |
3741 | int r = 0, q; |
3742 | char **i; | |
cca098b0 LP |
3743 | |
3744 | assert(u); | |
3745 | ||
f0831ed2 | 3746 | /* Make sure we don't enter a loop, when coldplugging recursively. */ |
f78f265f LP |
3747 | if (u->coldplugged) |
3748 | return 0; | |
3749 | ||
3750 | u->coldplugged = true; | |
3751 | ||
05a98afd LP |
3752 | STRV_FOREACH(i, u->deserialized_refs) { |
3753 | q = bus_unit_track_add_name(u, *i); | |
3754 | if (q < 0 && r >= 0) | |
3755 | r = q; | |
3756 | } | |
3757 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 3758 | |
05a98afd LP |
3759 | if (UNIT_VTABLE(u)->coldplug) { |
3760 | q = UNIT_VTABLE(u)->coldplug(u); | |
3761 | if (q < 0 && r >= 0) | |
3762 | r = q; | |
3763 | } | |
5a6158b6 | 3764 | |
05a98afd LP |
3765 | if (u->job) { |
3766 | q = job_coldplug(u->job); | |
3767 | if (q < 0 && r >= 0) | |
3768 | r = q; | |
3769 | } | |
cca098b0 | 3770 | |
05a98afd | 3771 | return r; |
cca098b0 LP |
3772 | } |
3773 | ||
f0831ed2 LP |
3774 | void unit_catchup(Unit *u) { |
3775 | assert(u); | |
3776 | ||
3777 | if (UNIT_VTABLE(u)->catchup) | |
3778 | UNIT_VTABLE(u)->catchup(u); | |
3779 | } | |
3780 | ||
ba25d39e | 3781 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3782 | struct stat st; |
3783 | ||
3784 | if (!path) | |
3785 | return false; | |
3786 | ||
77969722 LP |
3787 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3788 | * are never out-of-date. */ | |
3789 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3790 | return false; | |
3791 | ||
21b95806 ZJS |
3792 | if (stat(path, &st) < 0) |
3793 | /* What, cannot access this anymore? */ | |
3794 | return true; | |
3795 | ||
ba25d39e ZJS |
3796 | if (path_masked) |
3797 | /* For masked files check if they are still so */ | |
3798 | return !null_or_empty(&st); | |
3799 | else | |
3a8db9fe | 3800 | /* For non-empty files check the mtime */ |
87ec20ef | 3801 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3802 | |
3803 | return false; | |
3804 | } | |
3805 | ||
45fb0699 | 3806 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
3807 | _cleanup_strv_free_ char **t = NULL; |
3808 | char **path; | |
1b64d026 | 3809 | |
45fb0699 LP |
3810 | assert(u); |
3811 | ||
ba25d39e ZJS |
3812 | /* For unit files, we allow masking… */ |
3813 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3814 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3815 | return true; |
5f4b19f4 | 3816 | |
ba25d39e ZJS |
3817 | /* Source paths should not be masked… */ |
3818 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3819 | return true; |
ae7a7182 | 3820 | |
19a44dfe LR |
3821 | if (u->load_state == UNIT_LOADED) |
3822 | (void) unit_find_dropin_paths(u, &t); | |
ab932a62 LP |
3823 | if (!strv_equal(u->dropin_paths, t)) |
3824 | return true; | |
6d10d308 | 3825 | |
ba25d39e | 3826 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3827 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3828 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3829 | return true; |
21b95806 | 3830 | |
ab932a62 | 3831 | return false; |
45fb0699 LP |
3832 | } |
3833 | ||
fdf20a31 | 3834 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3835 | assert(u); |
3836 | ||
fdf20a31 MM |
3837 | if (UNIT_VTABLE(u)->reset_failed) |
3838 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 LP |
3839 | |
3840 | RATELIMIT_RESET(u->start_limit); | |
3841 | u->start_limit_hit = false; | |
5632e374 LP |
3842 | } |
3843 | ||
a7f241db LP |
3844 | Unit *unit_following(Unit *u) { |
3845 | assert(u); | |
3846 | ||
3847 | if (UNIT_VTABLE(u)->following) | |
3848 | return UNIT_VTABLE(u)->following(u); | |
3849 | ||
3850 | return NULL; | |
3851 | } | |
3852 | ||
31afa0a4 | 3853 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3854 | assert(u); |
3855 | ||
31afa0a4 LP |
3856 | /* This call does check the current state of the unit. It's |
3857 | * hence useful to be called from state change calls of the | |
3858 | * unit itself, where the state isn't updated yet. This is | |
3859 | * different from unit_inactive_or_pending() which checks both | |
3860 | * the current state and for a queued job. */ | |
18ffdfda | 3861 | |
31afa0a4 LP |
3862 | return u->job && u->job->type == JOB_STOP; |
3863 | } | |
3864 | ||
3865 | bool unit_inactive_or_pending(Unit *u) { | |
3866 | assert(u); | |
3867 | ||
3868 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3869 | |
d956ac29 LP |
3870 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3871 | return true; | |
3872 | ||
31afa0a4 | 3873 | if (unit_stop_pending(u)) |
18ffdfda LP |
3874 | return true; |
3875 | ||
3876 | return false; | |
3877 | } | |
3878 | ||
31afa0a4 | 3879 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3880 | assert(u); |
3881 | ||
f60c2665 | 3882 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3883 | |
3884 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3885 | return true; | |
3886 | ||
ac155bb8 | 3887 | if (u->job && |
3742095b | 3888 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
3889 | return true; |
3890 | ||
3891 | return false; | |
3892 | } | |
3893 | ||
deb4e708 MK |
3894 | bool unit_will_restart(Unit *u) { |
3895 | assert(u); | |
3896 | ||
3897 | if (!UNIT_VTABLE(u)->will_restart) | |
3898 | return false; | |
3899 | ||
3900 | return UNIT_VTABLE(u)->will_restart(u); | |
3901 | } | |
3902 | ||
718db961 | 3903 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3904 | assert(u); |
3905 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 3906 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 3907 | |
8a0867d6 | 3908 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3909 | return -EOPNOTSUPP; |
8a0867d6 | 3910 | |
c74f17d9 | 3911 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3912 | } |
3913 | ||
82659fd7 | 3914 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
af4fa99d | 3915 | _cleanup_set_free_ Set *pid_set = NULL; |
82659fd7 LP |
3916 | int r; |
3917 | ||
d5099efc | 3918 | pid_set = set_new(NULL); |
82659fd7 LP |
3919 | if (!pid_set) |
3920 | return NULL; | |
3921 | ||
3922 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3923 | if (main_pid > 0) { | |
fea72cc0 | 3924 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 | 3925 | if (r < 0) |
95f14a3e | 3926 | return NULL; |
82659fd7 LP |
3927 | } |
3928 | ||
3929 | if (control_pid > 0) { | |
fea72cc0 | 3930 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 | 3931 | if (r < 0) |
95f14a3e | 3932 | return NULL; |
82659fd7 LP |
3933 | } |
3934 | ||
95f14a3e | 3935 | return TAKE_PTR(pid_set); |
82659fd7 LP |
3936 | } |
3937 | ||
d91c34f2 LP |
3938 | int unit_kill_common( |
3939 | Unit *u, | |
3940 | KillWho who, | |
3941 | int signo, | |
3942 | pid_t main_pid, | |
3943 | pid_t control_pid, | |
718db961 | 3944 | sd_bus_error *error) { |
d91c34f2 | 3945 | |
814cc562 | 3946 | int r = 0; |
ac5e3a50 | 3947 | bool killed = false; |
814cc562 | 3948 | |
ac5e3a50 | 3949 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3950 | if (main_pid < 0) |
7358dc02 | 3951 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 3952 | else if (main_pid == 0) |
7358dc02 | 3953 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3954 | } |
3955 | ||
ac5e3a50 | 3956 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3957 | if (control_pid < 0) |
7358dc02 | 3958 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 3959 | else if (control_pid == 0) |
7358dc02 | 3960 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3961 | } |
3962 | ||
ac5e3a50 JS |
3963 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3964 | if (control_pid > 0) { | |
814cc562 MS |
3965 | if (kill(control_pid, signo) < 0) |
3966 | r = -errno; | |
ac5e3a50 JS |
3967 | else |
3968 | killed = true; | |
3969 | } | |
814cc562 | 3970 | |
ac5e3a50 JS |
3971 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3972 | if (main_pid > 0) { | |
814cc562 MS |
3973 | if (kill(main_pid, signo) < 0) |
3974 | r = -errno; | |
ac5e3a50 JS |
3975 | else |
3976 | killed = true; | |
3977 | } | |
814cc562 | 3978 | |
ac5e3a50 | 3979 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3980 | _cleanup_set_free_ Set *pid_set = NULL; |
3981 | int q; | |
3982 | ||
82659fd7 LP |
3983 | /* Exclude the main/control pids from being killed via the cgroup */ |
3984 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3985 | if (!pid_set) |
3986 | return -ENOMEM; | |
3987 | ||
1d98fef1 | 3988 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, NULL, NULL); |
4c701096 | 3989 | if (q < 0 && !IN_SET(q, -EAGAIN, -ESRCH, -ENOENT)) |
814cc562 | 3990 | r = q; |
ac5e3a50 JS |
3991 | else |
3992 | killed = true; | |
814cc562 MS |
3993 | } |
3994 | ||
201f0c91 | 3995 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL)) |
ac5e3a50 JS |
3996 | return -ESRCH; |
3997 | ||
814cc562 MS |
3998 | return r; |
3999 | } | |
4000 | ||
6210e7fc LP |
4001 | int unit_following_set(Unit *u, Set **s) { |
4002 | assert(u); | |
4003 | assert(s); | |
4004 | ||
4005 | if (UNIT_VTABLE(u)->following_set) | |
4006 | return UNIT_VTABLE(u)->following_set(u, s); | |
4007 | ||
4008 | *s = NULL; | |
4009 | return 0; | |
4010 | } | |
4011 | ||
a4375746 | 4012 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
4013 | int r; |
4014 | ||
a4375746 LP |
4015 | assert(u); |
4016 | ||
0ec0deaa LP |
4017 | if (u->unit_file_state < 0 && u->fragment_path) { |
4018 | r = unit_file_get_state( | |
463d0d15 | 4019 | u->manager->unit_file_scope, |
0ec0deaa | 4020 | NULL, |
9ea3a0e7 | 4021 | u->id, |
0ec0deaa LP |
4022 | &u->unit_file_state); |
4023 | if (r < 0) | |
4024 | u->unit_file_state = UNIT_FILE_BAD; | |
4025 | } | |
a4375746 | 4026 | |
ac155bb8 | 4027 | return u->unit_file_state; |
a4375746 LP |
4028 | } |
4029 | ||
d2dc52db LP |
4030 | int unit_get_unit_file_preset(Unit *u) { |
4031 | assert(u); | |
4032 | ||
4033 | if (u->unit_file_preset < 0 && u->fragment_path) | |
4034 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 4035 | u->manager->unit_file_scope, |
0ec0deaa LP |
4036 | NULL, |
4037 | basename(u->fragment_path)); | |
d2dc52db LP |
4038 | |
4039 | return u->unit_file_preset; | |
4040 | } | |
4041 | ||
7f7d01ed | 4042 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 4043 | assert(ref); |
7f7d01ed ZJS |
4044 | assert(source); |
4045 | assert(target); | |
57020a3a | 4046 | |
7f7d01ed | 4047 | if (ref->target) |
57020a3a LP |
4048 | unit_ref_unset(ref); |
4049 | ||
7f7d01ed ZJS |
4050 | ref->source = source; |
4051 | ref->target = target; | |
4052 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
4053 | return target; | |
57020a3a LP |
4054 | } |
4055 | ||
4056 | void unit_ref_unset(UnitRef *ref) { | |
4057 | assert(ref); | |
4058 | ||
7f7d01ed | 4059 | if (!ref->target) |
57020a3a LP |
4060 | return; |
4061 | ||
b75102e5 LP |
4062 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
4063 | * be unreferenced now. */ | |
7f7d01ed | 4064 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 4065 | |
7f7d01ed ZJS |
4066 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
4067 | ref->source = ref->target = NULL; | |
57020a3a LP |
4068 | } |
4069 | ||
29206d46 LP |
4070 | static int user_from_unit_name(Unit *u, char **ret) { |
4071 | ||
4072 | static const uint8_t hash_key[] = { | |
4073 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
4074 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
4075 | }; | |
4076 | ||
4077 | _cleanup_free_ char *n = NULL; | |
4078 | int r; | |
4079 | ||
4080 | r = unit_name_to_prefix(u->id, &n); | |
4081 | if (r < 0) | |
4082 | return r; | |
4083 | ||
4084 | if (valid_user_group_name(n)) { | |
ae2a15bc | 4085 | *ret = TAKE_PTR(n); |
29206d46 LP |
4086 | return 0; |
4087 | } | |
4088 | ||
4089 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
4090 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
4091 | return -ENOMEM; | |
4092 | ||
4093 | return 0; | |
4094 | } | |
4095 | ||
598459ce LP |
4096 | int unit_patch_contexts(Unit *u) { |
4097 | CGroupContext *cc; | |
4098 | ExecContext *ec; | |
cba6e062 LP |
4099 | unsigned i; |
4100 | int r; | |
4101 | ||
e06c73cc | 4102 | assert(u); |
e06c73cc | 4103 | |
598459ce LP |
4104 | /* Patch in the manager defaults into the exec and cgroup |
4105 | * contexts, _after_ the rest of the settings have been | |
4106 | * initialized */ | |
085afe36 | 4107 | |
598459ce LP |
4108 | ec = unit_get_exec_context(u); |
4109 | if (ec) { | |
4110 | /* This only copies in the ones that need memory */ | |
4111 | for (i = 0; i < _RLIMIT_MAX; i++) | |
4112 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
4113 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
4114 | if (!ec->rlimit[i]) | |
4115 | return -ENOMEM; | |
4116 | } | |
4117 | ||
463d0d15 | 4118 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4119 | !ec->working_directory) { |
4120 | ||
4121 | r = get_home_dir(&ec->working_directory); | |
4122 | if (r < 0) | |
4123 | return r; | |
4c08c824 LP |
4124 | |
4125 | /* Allow user services to run, even if the | |
4126 | * home directory is missing */ | |
4127 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4128 | } |
4129 | ||
598459ce | 4130 | if (ec->private_devices) |
2cd0a735 | 4131 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4132 | |
4133 | if (ec->protect_kernel_modules) | |
4134 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 LP |
4135 | |
4136 | if (ec->dynamic_user) { | |
4137 | if (!ec->user) { | |
4138 | r = user_from_unit_name(u, &ec->user); | |
4139 | if (r < 0) | |
4140 | return r; | |
4141 | } | |
4142 | ||
4143 | if (!ec->group) { | |
4144 | ec->group = strdup(ec->user); | |
4145 | if (!ec->group) | |
4146 | return -ENOMEM; | |
4147 | } | |
4148 | ||
63bb64a0 LP |
4149 | /* If the dynamic user option is on, let's make sure that the unit can't leave its UID/GID |
4150 | * around in the file system or on IPC objects. Hence enforce a strict sandbox. */ | |
4151 | ||
29206d46 | 4152 | ec->private_tmp = true; |
00d9ef85 | 4153 | ec->remove_ipc = true; |
63bb64a0 LP |
4154 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4155 | if (ec->protect_home == PROTECT_HOME_NO) | |
4156 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
29206d46 | 4157 | } |
cba6e062 LP |
4158 | } |
4159 | ||
598459ce | 4160 | cc = unit_get_cgroup_context(u); |
fe65e88b | 4161 | if (cc && ec) { |
f513e420 | 4162 | |
fe65e88b | 4163 | if (ec->private_devices && |
598459ce LP |
4164 | cc->device_policy == CGROUP_AUTO) |
4165 | cc->device_policy = CGROUP_CLOSED; | |
fe65e88b YW |
4166 | |
4167 | if (ec->root_image && | |
4168 | (cc->device_policy != CGROUP_AUTO || cc->device_allow)) { | |
4169 | ||
4170 | /* When RootImage= is specified, the following devices are touched. */ | |
4171 | r = cgroup_add_device_allow(cc, "/dev/loop-control", "rw"); | |
4172 | if (r < 0) | |
4173 | return r; | |
4174 | ||
4175 | r = cgroup_add_device_allow(cc, "block-loop", "rwm"); | |
4176 | if (r < 0) | |
4177 | return r; | |
4178 | ||
4179 | r = cgroup_add_device_allow(cc, "block-blkext", "rwm"); | |
4180 | if (r < 0) | |
4181 | return r; | |
4182 | } | |
598459ce | 4183 | } |
f1660f96 | 4184 | |
cba6e062 | 4185 | return 0; |
e06c73cc LP |
4186 | } |
4187 | ||
3ef63c31 LP |
4188 | ExecContext *unit_get_exec_context(Unit *u) { |
4189 | size_t offset; | |
4190 | assert(u); | |
4191 | ||
598459ce LP |
4192 | if (u->type < 0) |
4193 | return NULL; | |
4194 | ||
3ef63c31 LP |
4195 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4196 | if (offset <= 0) | |
4197 | return NULL; | |
4198 | ||
4199 | return (ExecContext*) ((uint8_t*) u + offset); | |
4200 | } | |
4201 | ||
718db961 LP |
4202 | KillContext *unit_get_kill_context(Unit *u) { |
4203 | size_t offset; | |
4204 | assert(u); | |
4205 | ||
598459ce LP |
4206 | if (u->type < 0) |
4207 | return NULL; | |
4208 | ||
718db961 LP |
4209 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4210 | if (offset <= 0) | |
4211 | return NULL; | |
4212 | ||
4213 | return (KillContext*) ((uint8_t*) u + offset); | |
4214 | } | |
4215 | ||
4ad49000 LP |
4216 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4217 | size_t offset; | |
4218 | ||
598459ce LP |
4219 | if (u->type < 0) |
4220 | return NULL; | |
4221 | ||
4ad49000 LP |
4222 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4223 | if (offset <= 0) | |
4224 | return NULL; | |
4225 | ||
4226 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4227 | } | |
4228 | ||
613b411c LP |
4229 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4230 | size_t offset; | |
4231 | ||
598459ce LP |
4232 | if (u->type < 0) |
4233 | return NULL; | |
4234 | ||
613b411c LP |
4235 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4236 | if (offset <= 0) | |
4237 | return NULL; | |
4238 | ||
4239 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4240 | } | |
4241 | ||
2e59b241 | 4242 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4243 | assert(u); |
4244 | ||
2e59b241 | 4245 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4246 | return NULL; |
4247 | ||
39591351 LP |
4248 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4249 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4250 | |
2e59b241 | 4251 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4252 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4253 | |
2e59b241 LP |
4254 | if (flags & UNIT_RUNTIME) |
4255 | return u->manager->lookup_paths.runtime_control; | |
4256 | ||
39591351 | 4257 | return NULL; |
71645aca LP |
4258 | } |
4259 | ||
2e59b241 LP |
4260 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4261 | char *ret = NULL; | |
4262 | ||
4263 | if (!s) | |
4264 | return NULL; | |
4265 | ||
4266 | /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated | |
4267 | * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is | |
4268 | * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly | |
4269 | * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is | |
4270 | * not specified, then the return value always needs to be freed. Callers can use this to optimize memory | |
4271 | * allocations. */ | |
4272 | ||
4273 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
4274 | ret = specifier_escape(s); | |
4275 | if (!ret) | |
4276 | return NULL; | |
4277 | ||
4278 | s = ret; | |
4279 | } | |
4280 | ||
4281 | if (flags & UNIT_ESCAPE_C) { | |
4282 | char *a; | |
4283 | ||
4284 | a = cescape(s); | |
4285 | free(ret); | |
4286 | if (!a) | |
4287 | return NULL; | |
4288 | ||
4289 | ret = a; | |
4290 | } | |
4291 | ||
4292 | if (buf) { | |
4293 | *buf = ret; | |
4294 | return ret ?: (char*) s; | |
4295 | } | |
4296 | ||
4297 | return ret ?: strdup(s); | |
4298 | } | |
4299 | ||
4300 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4301 | _cleanup_free_ char *result = NULL; | |
4302 | size_t n = 0, allocated = 0; | |
ae2a15bc | 4303 | char **i; |
2e59b241 LP |
4304 | |
4305 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a | |
4306 | * way suitable for ExecStart= stanzas */ | |
4307 | ||
4308 | STRV_FOREACH(i, l) { | |
4309 | _cleanup_free_ char *buf = NULL; | |
4310 | const char *p; | |
4311 | size_t a; | |
4312 | char *q; | |
4313 | ||
4314 | p = unit_escape_setting(*i, flags, &buf); | |
4315 | if (!p) | |
4316 | return NULL; | |
4317 | ||
4318 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
4319 | if (!GREEDY_REALLOC(result, allocated, n + a + 1)) | |
4320 | return NULL; | |
4321 | ||
4322 | q = result + n; | |
4323 | if (n > 0) | |
4324 | *(q++) = ' '; | |
4325 | ||
4326 | *(q++) = '"'; | |
4327 | q = stpcpy(q, p); | |
4328 | *(q++) = '"'; | |
4329 | ||
4330 | n += a; | |
4331 | } | |
4332 | ||
4333 | if (!GREEDY_REALLOC(result, allocated, n + 1)) | |
4334 | return NULL; | |
4335 | ||
4336 | result[n] = 0; | |
4337 | ||
ae2a15bc | 4338 | return TAKE_PTR(result); |
2e59b241 LP |
4339 | } |
4340 | ||
4341 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4342 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4343 | const char *dir, *wrapped; |
26d04f86 | 4344 | int r; |
71645aca LP |
4345 | |
4346 | assert(u); | |
2e59b241 LP |
4347 | assert(name); |
4348 | assert(data); | |
4349 | ||
4350 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4351 | return 0; | |
4352 | ||
4353 | data = unit_escape_setting(data, flags, &escaped); | |
4354 | if (!data) | |
4355 | return -ENOMEM; | |
4356 | ||
4357 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4358 | * previous section header is the same */ | |
4359 | ||
4360 | if (flags & UNIT_PRIVATE) { | |
4361 | if (!UNIT_VTABLE(u)->private_section) | |
4362 | return -EINVAL; | |
4363 | ||
4364 | if (!u->transient_file || u->last_section_private < 0) | |
4365 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4366 | else if (u->last_section_private == 0) | |
4367 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4368 | } else { | |
4369 | if (!u->transient_file || u->last_section_private < 0) | |
4370 | data = strjoina("[Unit]\n", data); | |
4371 | else if (u->last_section_private > 0) | |
4372 | data = strjoina("\n[Unit]\n", data); | |
4373 | } | |
71645aca | 4374 | |
4f4afc88 LP |
4375 | if (u->transient_file) { |
4376 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4377 | * write to the transient unit file. */ | |
4378 | fputs(data, u->transient_file); | |
4f4afc88 | 4379 | |
2e59b241 LP |
4380 | if (!endswith(data, "\n")) |
4381 | fputc('\n', u->transient_file); | |
4382 | ||
4383 | /* Remember which section we wrote this entry to */ | |
4384 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4385 | return 0; |
2e59b241 | 4386 | } |
8e2af478 | 4387 | |
2e59b241 | 4388 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4389 | if (!dir) |
4390 | return -EINVAL; | |
71645aca | 4391 | |
2a9a6f8a | 4392 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4393 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4394 | data, |
4395 | "\n"); | |
e20b2a86 | 4396 | |
815b09d3 | 4397 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4398 | if (r < 0) |
4399 | return r; | |
4400 | ||
45639f1b | 4401 | (void) mkdir_p_label(p, 0755); |
2a9a6f8a | 4402 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4403 | if (r < 0) |
4404 | return r; | |
4405 | ||
815b09d3 | 4406 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4407 | if (r < 0) |
4408 | return r; | |
815b09d3 | 4409 | q = NULL; |
adb76a70 | 4410 | |
adb76a70 WC |
4411 | strv_uniq(u->dropin_paths); |
4412 | ||
4413 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4414 | ||
4415 | return 0; | |
26d04f86 | 4416 | } |
71645aca | 4417 | |
2e59b241 | 4418 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4419 | _cleanup_free_ char *p = NULL; |
4420 | va_list ap; | |
4421 | int r; | |
4422 | ||
4423 | assert(u); | |
4424 | assert(name); | |
4425 | assert(format); | |
4426 | ||
2e59b241 | 4427 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4428 | return 0; |
4429 | ||
4430 | va_start(ap, format); | |
4431 | r = vasprintf(&p, format, ap); | |
4432 | va_end(ap); | |
4433 | ||
4434 | if (r < 0) | |
4435 | return -ENOMEM; | |
4436 | ||
2e59b241 | 4437 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4438 | } |
71645aca | 4439 | |
c2756a68 | 4440 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4441 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4442 | FILE *f; |
4f4afc88 | 4443 | |
c2756a68 LP |
4444 | assert(u); |
4445 | ||
3f5e8115 LP |
4446 | if (!UNIT_VTABLE(u)->can_transient) |
4447 | return -EOPNOTSUPP; | |
4448 | ||
45639f1b LP |
4449 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4450 | ||
605405c6 | 4451 | path = strjoin(u->manager->lookup_paths.transient, "/", u->id); |
4f4afc88 LP |
4452 | if (!path) |
4453 | return -ENOMEM; | |
4454 | ||
4455 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4456 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4457 | ||
78e334b5 | 4458 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 4459 | f = fopen(path, "we"); |
0126c8f3 | 4460 | if (!f) |
78e334b5 | 4461 | return -errno; |
4f4afc88 LP |
4462 | } |
4463 | ||
0126c8f3 | 4464 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4465 | u->transient_file = f; |
4466 | ||
0126c8f3 | 4467 | free_and_replace(u->fragment_path, path); |
7c65093a | 4468 | |
7c65093a LP |
4469 | u->source_path = mfree(u->source_path); |
4470 | u->dropin_paths = strv_free(u->dropin_paths); | |
4471 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4472 | ||
4f4afc88 LP |
4473 | u->load_state = UNIT_STUB; |
4474 | u->load_error = 0; | |
4475 | u->transient = true; | |
4476 | ||
7c65093a LP |
4477 | unit_add_to_dbus_queue(u); |
4478 | unit_add_to_gc_queue(u); | |
c2756a68 | 4479 | |
4f4afc88 LP |
4480 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4481 | u->transient_file); | |
4482 | ||
3f5e8115 | 4483 | return 0; |
c2756a68 LP |
4484 | } |
4485 | ||
1d98fef1 LP |
4486 | static void log_kill(pid_t pid, int sig, void *userdata) { |
4487 | _cleanup_free_ char *comm = NULL; | |
4488 | ||
4489 | (void) get_process_comm(pid, &comm); | |
4490 | ||
4491 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4492 | only, like for example systemd's own PAM stub process. */ | |
4493 | if (comm && comm[0] == '(') | |
4494 | return; | |
4495 | ||
4496 | log_unit_notice(userdata, | |
4497 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4498 | pid, | |
4499 | strna(comm), | |
4500 | signal_to_string(sig)); | |
4501 | } | |
4502 | ||
4503 | static int operation_to_signal(KillContext *c, KillOperation k) { | |
4504 | assert(c); | |
4505 | ||
4506 | switch (k) { | |
4507 | ||
4508 | case KILL_TERMINATE: | |
4509 | case KILL_TERMINATE_AND_LOG: | |
4510 | return c->kill_signal; | |
4511 | ||
4512 | case KILL_KILL: | |
fbb48d4c | 4513 | return c->final_kill_signal; |
1d98fef1 | 4514 | |
c87700a1 AZ |
4515 | case KILL_WATCHDOG: |
4516 | return c->watchdog_signal; | |
1d98fef1 LP |
4517 | |
4518 | default: | |
4519 | assert_not_reached("KillOperation unknown"); | |
4520 | } | |
4521 | } | |
4522 | ||
cd2086fe LP |
4523 | int unit_kill_context( |
4524 | Unit *u, | |
4525 | KillContext *c, | |
db2cb23b | 4526 | KillOperation k, |
cd2086fe LP |
4527 | pid_t main_pid, |
4528 | pid_t control_pid, | |
4529 | bool main_pid_alien) { | |
4530 | ||
1d98fef1 | 4531 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4532 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4533 | int sig, r; |
cd2086fe LP |
4534 | |
4535 | assert(u); | |
4536 | assert(c); | |
4537 | ||
59ec09a8 ZJS |
4538 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. |
4539 | * Returns > 0 if we killed something worth waiting for, 0 otherwise. */ | |
1d98fef1 | 4540 | |
cd2086fe LP |
4541 | if (c->kill_mode == KILL_NONE) |
4542 | return 0; | |
4543 | ||
1d98fef1 LP |
4544 | sig = operation_to_signal(c, k); |
4545 | ||
4546 | send_sighup = | |
4547 | c->send_sighup && | |
4548 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4549 | sig != SIGHUP; | |
4550 | ||
59ec09a8 ZJS |
4551 | if (k != KILL_TERMINATE || IN_SET(sig, SIGKILL, SIGABRT)) |
4552 | log_func = log_kill; | |
cd2086fe LP |
4553 | |
4554 | if (main_pid > 0) { | |
1d98fef1 LP |
4555 | if (log_func) |
4556 | log_func(main_pid, sig, u); | |
cd2086fe | 4557 | |
1d98fef1 | 4558 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4559 | if (r < 0 && r != -ESRCH) { |
4560 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4561 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 4562 | |
b821a397 | 4563 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 4564 | } else { |
bc6aed7b LP |
4565 | if (!main_pid_alien) |
4566 | wait_for_exit = true; | |
82659fd7 | 4567 | |
1d98fef1 | 4568 | if (r != -ESRCH && send_sighup) |
d0667321 | 4569 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 4570 | } |
cd2086fe LP |
4571 | } |
4572 | ||
4573 | if (control_pid > 0) { | |
1d98fef1 LP |
4574 | if (log_func) |
4575 | log_func(control_pid, sig, u); | |
cd2086fe | 4576 | |
1d98fef1 | 4577 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4578 | if (r < 0 && r != -ESRCH) { |
4579 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4580 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 4581 | |
b821a397 | 4582 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 4583 | } else { |
cd2086fe | 4584 | wait_for_exit = true; |
82659fd7 | 4585 | |
1d98fef1 | 4586 | if (r != -ESRCH && send_sighup) |
d0667321 | 4587 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 4588 | } |
cd2086fe LP |
4589 | } |
4590 | ||
b821a397 LP |
4591 | if (u->cgroup_path && |
4592 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4593 | _cleanup_set_free_ Set *pid_set = NULL; |
4594 | ||
82659fd7 LP |
4595 | /* Exclude the main/control pids from being killed via the cgroup */ |
4596 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4597 | if (!pid_set) |
4598 | return -ENOMEM; | |
4599 | ||
1d98fef1 LP |
4600 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4601 | sig, | |
4602 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4603 | pid_set, | |
4604 | log_func, u); | |
cd2086fe | 4605 | if (r < 0) { |
4c701096 | 4606 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
b821a397 LP |
4607 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
4608 | ||
82659fd7 | 4609 | } else if (r > 0) { |
bc6aed7b | 4610 | |
1d9cc876 LP |
4611 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4612 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
4613 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
4614 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
4615 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
4616 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 4617 | |
c22800e4 | 4618 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 4619 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 4620 | wait_for_exit = true; |
58ea275a | 4621 | |
1d98fef1 | 4622 | if (send_sighup) { |
82659fd7 LP |
4623 | set_free(pid_set); |
4624 | ||
4625 | pid_set = unit_pid_set(main_pid, control_pid); | |
4626 | if (!pid_set) | |
4627 | return -ENOMEM; | |
4628 | ||
1d98fef1 LP |
4629 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4630 | SIGHUP, | |
4631 | CGROUP_IGNORE_SELF, | |
4632 | pid_set, | |
4633 | NULL, NULL); | |
82659fd7 LP |
4634 | } |
4635 | } | |
cd2086fe LP |
4636 | } |
4637 | ||
4638 | return wait_for_exit; | |
4639 | } | |
4640 | ||
eef85c4a | 4641 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
ca8700e9 ZJS |
4642 | _cleanup_free_ char *p = NULL; |
4643 | char *prefix; | |
eef85c4a | 4644 | UnitDependencyInfo di; |
a57f7e2c LP |
4645 | int r; |
4646 | ||
4647 | assert(u); | |
4648 | assert(path); | |
4649 | ||
eef85c4a LP |
4650 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in |
4651 | * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to | |
4652 | * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily | |
4653 | * determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4654 | |
70b64bd3 ZJS |
4655 | if (!path_is_absolute(path)) |
4656 | return -EINVAL; | |
4657 | ||
548f6937 | 4658 | r = hashmap_ensure_allocated(&u->requires_mounts_for, &path_hash_ops); |
eef85c4a LP |
4659 | if (r < 0) |
4660 | return r; | |
4661 | ||
a57f7e2c LP |
4662 | p = strdup(path); |
4663 | if (!p) | |
4664 | return -ENOMEM; | |
4665 | ||
858d36c1 | 4666 | path = path_simplify(p, false); |
a57f7e2c | 4667 | |
ca8700e9 | 4668 | if (!path_is_normalized(path)) |
a57f7e2c | 4669 | return -EPERM; |
a57f7e2c | 4670 | |
ca8700e9 | 4671 | if (hashmap_contains(u->requires_mounts_for, path)) |
a57f7e2c | 4672 | return 0; |
a57f7e2c | 4673 | |
eef85c4a LP |
4674 | di = (UnitDependencyInfo) { |
4675 | .origin_mask = mask | |
4676 | }; | |
4677 | ||
ca8700e9 ZJS |
4678 | r = hashmap_put(u->requires_mounts_for, path, di.data); |
4679 | if (r < 0) | |
a57f7e2c | 4680 | return r; |
ca8700e9 | 4681 | p = NULL; |
a57f7e2c | 4682 | |
ca8700e9 ZJS |
4683 | prefix = alloca(strlen(path) + 1); |
4684 | PATH_FOREACH_PREFIX_MORE(prefix, path) { | |
a57f7e2c LP |
4685 | Set *x; |
4686 | ||
4687 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4688 | if (!x) { | |
ca8700e9 | 4689 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 4690 | |
548f6937 | 4691 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
742f41ad LP |
4692 | if (r < 0) |
4693 | return r; | |
a57f7e2c LP |
4694 | |
4695 | q = strdup(prefix); | |
4696 | if (!q) | |
4697 | return -ENOMEM; | |
4698 | ||
d5099efc | 4699 | x = set_new(NULL); |
ca8700e9 | 4700 | if (!x) |
a57f7e2c | 4701 | return -ENOMEM; |
a57f7e2c LP |
4702 | |
4703 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4704 | if (r < 0) { | |
a57f7e2c LP |
4705 | set_free(x); |
4706 | return r; | |
4707 | } | |
ca8700e9 | 4708 | q = NULL; |
a57f7e2c LP |
4709 | } |
4710 | ||
4711 | r = set_put(x, u); | |
4712 | if (r < 0) | |
4713 | return r; | |
4714 | } | |
4715 | ||
4716 | return 0; | |
4717 | } | |
4718 | ||
613b411c LP |
4719 | int unit_setup_exec_runtime(Unit *u) { |
4720 | ExecRuntime **rt; | |
4721 | size_t offset; | |
613b411c | 4722 | Unit *other; |
eef85c4a LP |
4723 | Iterator i; |
4724 | void *v; | |
e8a565cb | 4725 | int r; |
613b411c LP |
4726 | |
4727 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4728 | assert(offset > 0); | |
4729 | ||
06b643e7 | 4730 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
4731 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
4732 | if (*rt) | |
4733 | return 0; | |
4734 | ||
4735 | /* Try to get it from somebody else */ | |
eef85c4a | 4736 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { |
e8a565cb YW |
4737 | r = exec_runtime_acquire(u->manager, NULL, other->id, false, rt); |
4738 | if (r == 1) | |
4739 | return 1; | |
613b411c LP |
4740 | } |
4741 | ||
e8a565cb | 4742 | return exec_runtime_acquire(u->manager, unit_get_exec_context(u), u->id, true, rt); |
613b411c LP |
4743 | } |
4744 | ||
29206d46 LP |
4745 | int unit_setup_dynamic_creds(Unit *u) { |
4746 | ExecContext *ec; | |
4747 | DynamicCreds *dcreds; | |
4748 | size_t offset; | |
4749 | ||
4750 | assert(u); | |
4751 | ||
4752 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
4753 | assert(offset > 0); | |
4754 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
4755 | ||
4756 | ec = unit_get_exec_context(u); | |
4757 | assert(ec); | |
4758 | ||
4759 | if (!ec->dynamic_user) | |
4760 | return 0; | |
4761 | ||
4762 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
4763 | } | |
4764 | ||
1c2e9646 LP |
4765 | bool unit_type_supported(UnitType t) { |
4766 | if (_unlikely_(t < 0)) | |
4767 | return false; | |
4768 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
4769 | return false; | |
4770 | ||
4771 | if (!unit_vtable[t]->supported) | |
4772 | return true; | |
4773 | ||
4774 | return unit_vtable[t]->supported(); | |
4775 | } | |
4776 | ||
8b4305c7 LP |
4777 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
4778 | int r; | |
4779 | ||
4780 | assert(u); | |
4781 | assert(where); | |
4782 | ||
4783 | r = dir_is_empty(where); | |
3f602115 | 4784 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
4785 | return; |
4786 | if (r < 0) { | |
4787 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
4788 | return; | |
4789 | } | |
4790 | ||
4791 | log_struct(LOG_NOTICE, | |
2b044526 | 4792 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4793 | LOG_UNIT_ID(u), |
f1c50bec | 4794 | LOG_UNIT_INVOCATION_ID(u), |
8b4305c7 | 4795 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), |
a1230ff9 | 4796 | "WHERE=%s", where); |
8b4305c7 LP |
4797 | } |
4798 | ||
25cd4964 AJ |
4799 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
4800 | _cleanup_free_ char *canonical_where; | |
8b4305c7 LP |
4801 | int r; |
4802 | ||
4803 | assert(u); | |
4804 | assert(where); | |
4805 | ||
25cd4964 | 4806 | r = chase_symlinks(where, NULL, CHASE_NONEXISTENT, &canonical_where); |
8b4305c7 | 4807 | if (r < 0) { |
25cd4964 | 4808 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
4809 | return 0; |
4810 | } | |
25cd4964 AJ |
4811 | |
4812 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
4813 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
4814 | return 0; |
4815 | ||
25cd4964 | 4816 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
8b4305c7 | 4817 | log_struct(LOG_ERR, |
2b044526 | 4818 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4819 | LOG_UNIT_ID(u), |
f1c50bec | 4820 | LOG_UNIT_INVOCATION_ID(u), |
25cd4964 | 4821 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), |
a1230ff9 | 4822 | "WHERE=%s", where); |
8b4305c7 LP |
4823 | |
4824 | return -ELOOP; | |
4825 | } | |
0f13f3bd LP |
4826 | |
4827 | bool unit_is_pristine(Unit *u) { | |
4828 | assert(u); | |
4829 | ||
7c65093a | 4830 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
4831 | * in a number of different ways. Note that to cater for unit |
4832 | * types such as slice, we are generally fine with units that | |
e9e8cbc8 ZJS |
4833 | * are marked UNIT_LOADED even though nothing was actually |
4834 | * loaded, as those unit types don't require a file on disk. */ | |
0f13f3bd LP |
4835 | |
4836 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
4837 | u->fragment_path || | |
4838 | u->source_path || | |
4839 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
4840 | u->job || |
4841 | u->merged_into); | |
4842 | } | |
291d565a LP |
4843 | |
4844 | pid_t unit_control_pid(Unit *u) { | |
4845 | assert(u); | |
4846 | ||
4847 | if (UNIT_VTABLE(u)->control_pid) | |
4848 | return UNIT_VTABLE(u)->control_pid(u); | |
4849 | ||
4850 | return 0; | |
4851 | } | |
4852 | ||
4853 | pid_t unit_main_pid(Unit *u) { | |
4854 | assert(u); | |
4855 | ||
4856 | if (UNIT_VTABLE(u)->main_pid) | |
4857 | return UNIT_VTABLE(u)->main_pid(u); | |
4858 | ||
4859 | return 0; | |
4860 | } | |
00d9ef85 LP |
4861 | |
4862 | static void unit_unref_uid_internal( | |
4863 | Unit *u, | |
4864 | uid_t *ref_uid, | |
4865 | bool destroy_now, | |
4866 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
4867 | ||
4868 | assert(u); | |
4869 | assert(ref_uid); | |
4870 | assert(_manager_unref_uid); | |
4871 | ||
4872 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
4873 | * gid_t are actually the same time, with the same validity rules. | |
4874 | * | |
4875 | * Drops a reference to UID/GID from a unit. */ | |
4876 | ||
4877 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4878 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4879 | ||
4880 | if (!uid_is_valid(*ref_uid)) | |
4881 | return; | |
4882 | ||
4883 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
4884 | *ref_uid = UID_INVALID; | |
4885 | } | |
4886 | ||
4887 | void unit_unref_uid(Unit *u, bool destroy_now) { | |
4888 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); | |
4889 | } | |
4890 | ||
4891 | void unit_unref_gid(Unit *u, bool destroy_now) { | |
4892 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); | |
4893 | } | |
4894 | ||
4895 | static int unit_ref_uid_internal( | |
4896 | Unit *u, | |
4897 | uid_t *ref_uid, | |
4898 | uid_t uid, | |
4899 | bool clean_ipc, | |
4900 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
4901 | ||
4902 | int r; | |
4903 | ||
4904 | assert(u); | |
4905 | assert(ref_uid); | |
4906 | assert(uid_is_valid(uid)); | |
4907 | assert(_manager_ref_uid); | |
4908 | ||
4909 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
4910 | * are actually the same type, and have the same validity rules. | |
4911 | * | |
4912 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
4913 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
4914 | * drops to zero. */ | |
4915 | ||
4916 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4917 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4918 | ||
4919 | if (*ref_uid == uid) | |
4920 | return 0; | |
4921 | ||
4922 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
4923 | return -EBUSY; | |
4924 | ||
4925 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
4926 | if (r < 0) | |
4927 | return r; | |
4928 | ||
4929 | *ref_uid = uid; | |
4930 | return 1; | |
4931 | } | |
4932 | ||
4933 | int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { | |
4934 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); | |
4935 | } | |
4936 | ||
4937 | int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { | |
4938 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); | |
4939 | } | |
4940 | ||
4941 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
4942 | int r = 0, q = 0; | |
4943 | ||
4944 | assert(u); | |
4945 | ||
4946 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
4947 | ||
4948 | if (uid_is_valid(uid)) { | |
4949 | r = unit_ref_uid(u, uid, clean_ipc); | |
4950 | if (r < 0) | |
4951 | return r; | |
4952 | } | |
4953 | ||
4954 | if (gid_is_valid(gid)) { | |
4955 | q = unit_ref_gid(u, gid, clean_ipc); | |
4956 | if (q < 0) { | |
4957 | if (r > 0) | |
4958 | unit_unref_uid(u, false); | |
4959 | ||
4960 | return q; | |
4961 | } | |
4962 | } | |
4963 | ||
4964 | return r > 0 || q > 0; | |
4965 | } | |
4966 | ||
4967 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
4968 | ExecContext *c; | |
4969 | int r; | |
4970 | ||
4971 | assert(u); | |
4972 | ||
4973 | c = unit_get_exec_context(u); | |
4974 | ||
4975 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
4976 | if (r < 0) | |
4977 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
4978 | ||
4979 | return r; | |
4980 | } | |
4981 | ||
4982 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { | |
4983 | assert(u); | |
4984 | ||
4985 | unit_unref_uid(u, destroy_now); | |
4986 | unit_unref_gid(u, destroy_now); | |
4987 | } | |
4988 | ||
4989 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { | |
4990 | int r; | |
4991 | ||
4992 | assert(u); | |
4993 | ||
4994 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
4995 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
4996 | * objects when no service references the UID/GID anymore. */ | |
4997 | ||
4998 | r = unit_ref_uid_gid(u, uid, gid); | |
4999 | if (r > 0) | |
5000 | bus_unit_send_change_signal(u); | |
5001 | } | |
4b58153d LP |
5002 | |
5003 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { | |
5004 | int r; | |
5005 | ||
5006 | assert(u); | |
5007 | ||
5008 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
5009 | ||
5010 | if (sd_id128_equal(u->invocation_id, id)) | |
5011 | return 0; | |
5012 | ||
5013 | if (!sd_id128_is_null(u->invocation_id)) | |
5014 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
5015 | ||
5016 | if (sd_id128_is_null(id)) { | |
5017 | r = 0; | |
5018 | goto reset; | |
5019 | } | |
5020 | ||
5021 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
5022 | if (r < 0) | |
5023 | goto reset; | |
5024 | ||
5025 | u->invocation_id = id; | |
5026 | sd_id128_to_string(id, u->invocation_id_string); | |
5027 | ||
5028 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
5029 | if (r < 0) | |
5030 | goto reset; | |
5031 | ||
5032 | return 0; | |
5033 | ||
5034 | reset: | |
5035 | u->invocation_id = SD_ID128_NULL; | |
5036 | u->invocation_id_string[0] = 0; | |
5037 | return r; | |
5038 | } | |
5039 | ||
5040 | int unit_acquire_invocation_id(Unit *u) { | |
5041 | sd_id128_t id; | |
5042 | int r; | |
5043 | ||
5044 | assert(u); | |
5045 | ||
5046 | r = sd_id128_randomize(&id); | |
5047 | if (r < 0) | |
5048 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
5049 | ||
5050 | r = unit_set_invocation_id(u, id); | |
5051 | if (r < 0) | |
5052 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
5053 | ||
5054 | return 0; | |
5055 | } | |
f0d47797 | 5056 | |
7960b0c7 LP |
5057 | void unit_set_exec_params(Unit *u, ExecParameters *p) { |
5058 | assert(u); | |
5059 | assert(p); | |
f0d47797 | 5060 | |
004c7f16 LP |
5061 | /* Copy parameters from manager */ |
5062 | p->environment = u->manager->environment; | |
5063 | p->confirm_spawn = manager_get_confirm_spawn(u->manager); | |
5064 | p->cgroup_supported = u->manager->cgroup_supported; | |
5065 | p->prefix = u->manager->prefix; | |
5066 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
5067 | ||
5068 | /* Copy paramaters from unit */ | |
7960b0c7 | 5069 | p->cgroup_path = u->cgroup_path; |
1d9cc876 | 5070 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
f0d47797 | 5071 | } |
a79279c7 | 5072 | |
4c253ed1 | 5073 | int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) { |
a79279c7 LP |
5074 | int r; |
5075 | ||
5076 | assert(u); | |
5077 | assert(ret); | |
5078 | ||
5079 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
5080 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
5081 | ||
5082 | (void) unit_realize_cgroup(u); | |
5083 | ||
4c253ed1 LP |
5084 | r = safe_fork(name, FORK_REOPEN_LOG, ret); |
5085 | if (r != 0) | |
5086 | return r; | |
a79279c7 | 5087 | |
4c253ed1 LP |
5088 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); |
5089 | (void) ignore_signals(SIGPIPE, -1); | |
a79279c7 | 5090 | |
4c253ed1 | 5091 | (void) prctl(PR_SET_PDEATHSIG, SIGTERM); |
a79279c7 | 5092 | |
4c253ed1 LP |
5093 | if (u->cgroup_path) { |
5094 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
5095 | if (r < 0) { | |
5096 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", u->cgroup_path); | |
5097 | _exit(EXIT_CGROUP); | |
a79279c7 | 5098 | } |
a79279c7 LP |
5099 | } |
5100 | ||
4c253ed1 | 5101 | return 0; |
a79279c7 | 5102 | } |
c999cf38 LP |
5103 | |
5104 | static void unit_update_dependency_mask(Unit *u, UnitDependency d, Unit *other, UnitDependencyInfo di) { | |
5105 | assert(u); | |
5106 | assert(d >= 0); | |
5107 | assert(d < _UNIT_DEPENDENCY_MAX); | |
5108 | assert(other); | |
5109 | ||
5110 | if (di.origin_mask == 0 && di.destination_mask == 0) { | |
5111 | /* No bit set anymore, let's drop the whole entry */ | |
5112 | assert_se(hashmap_remove(u->dependencies[d], other)); | |
5113 | log_unit_debug(u, "%s lost dependency %s=%s", u->id, unit_dependency_to_string(d), other->id); | |
5114 | } else | |
5115 | /* Mask was reduced, let's update the entry */ | |
5116 | assert_se(hashmap_update(u->dependencies[d], other, di.data) == 0); | |
5117 | } | |
5118 | ||
5119 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
5120 | UnitDependency d; | |
5121 | ||
5122 | assert(u); | |
5123 | ||
5124 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5125 | ||
5126 | if (mask == 0) | |
5127 | return; | |
5128 | ||
5129 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
5130 | bool done; | |
5131 | ||
5132 | do { | |
5133 | UnitDependencyInfo di; | |
5134 | Unit *other; | |
5135 | Iterator i; | |
5136 | ||
5137 | done = true; | |
5138 | ||
5139 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { | |
5140 | UnitDependency q; | |
5141 | ||
5142 | if ((di.origin_mask & ~mask) == di.origin_mask) | |
5143 | continue; | |
5144 | di.origin_mask &= ~mask; | |
5145 | unit_update_dependency_mask(u, d, other, di); | |
5146 | ||
5147 | /* We updated the dependency from our unit to the other unit now. But most dependencies | |
5148 | * imply a reverse dependency. Hence, let's delete that one too. For that we go through | |
5149 | * all dependency types on the other unit and delete all those which point to us and | |
5150 | * have the right mask set. */ | |
5151 | ||
5152 | for (q = 0; q < _UNIT_DEPENDENCY_MAX; q++) { | |
5153 | UnitDependencyInfo dj; | |
5154 | ||
5155 | dj.data = hashmap_get(other->dependencies[q], u); | |
5156 | if ((dj.destination_mask & ~mask) == dj.destination_mask) | |
5157 | continue; | |
5158 | dj.destination_mask &= ~mask; | |
5159 | ||
5160 | unit_update_dependency_mask(other, q, u, dj); | |
5161 | } | |
5162 | ||
5163 | unit_add_to_gc_queue(other); | |
5164 | ||
5165 | done = false; | |
5166 | break; | |
5167 | } | |
5168 | ||
5169 | } while (!done); | |
5170 | } | |
5171 | } | |
d3070fbd LP |
5172 | |
5173 | static int unit_export_invocation_id(Unit *u) { | |
5174 | const char *p; | |
5175 | int r; | |
5176 | ||
5177 | assert(u); | |
5178 | ||
5179 | if (u->exported_invocation_id) | |
5180 | return 0; | |
5181 | ||
5182 | if (sd_id128_is_null(u->invocation_id)) | |
5183 | return 0; | |
5184 | ||
5185 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
5186 | r = symlink_atomic(u->invocation_id_string, p); | |
5187 | if (r < 0) | |
5188 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5189 | ||
5190 | u->exported_invocation_id = true; | |
5191 | return 0; | |
5192 | } | |
5193 | ||
5194 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5195 | const char *p; | |
5196 | char buf[2]; | |
5197 | int r; | |
5198 | ||
5199 | assert(u); | |
5200 | assert(c); | |
5201 | ||
5202 | if (u->exported_log_level_max) | |
5203 | return 0; | |
5204 | ||
5205 | if (c->log_level_max < 0) | |
5206 | return 0; | |
5207 | ||
5208 | assert(c->log_level_max <= 7); | |
5209 | ||
5210 | buf[0] = '0' + c->log_level_max; | |
5211 | buf[1] = 0; | |
5212 | ||
5213 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5214 | r = symlink_atomic(buf, p); | |
5215 | if (r < 0) | |
5216 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5217 | ||
5218 | u->exported_log_level_max = true; | |
5219 | return 0; | |
5220 | } | |
5221 | ||
5222 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5223 | _cleanup_close_ int fd = -1; | |
5224 | struct iovec *iovec; | |
5225 | const char *p; | |
5226 | char *pattern; | |
5227 | le64_t *sizes; | |
5228 | ssize_t n; | |
5229 | size_t i; | |
5230 | int r; | |
5231 | ||
5232 | if (u->exported_log_extra_fields) | |
5233 | return 0; | |
5234 | ||
5235 | if (c->n_log_extra_fields <= 0) | |
5236 | return 0; | |
5237 | ||
5238 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5239 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5240 | ||
5241 | for (i = 0; i < c->n_log_extra_fields; i++) { | |
5242 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); | |
5243 | ||
5244 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5245 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5246 | } | |
5247 | ||
5248 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5249 | pattern = strjoina(p, ".XXXXXX"); | |
5250 | ||
5251 | fd = mkostemp_safe(pattern); | |
5252 | if (fd < 0) | |
5253 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5254 | ||
5255 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5256 | if (n < 0) { | |
5257 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5258 | goto fail; | |
5259 | } | |
5260 | ||
5261 | (void) fchmod(fd, 0644); | |
5262 | ||
5263 | if (rename(pattern, p) < 0) { | |
5264 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5265 | goto fail; | |
5266 | } | |
5267 | ||
5268 | u->exported_log_extra_fields = true; | |
5269 | return 0; | |
5270 | ||
5271 | fail: | |
5272 | (void) unlink(pattern); | |
5273 | return r; | |
5274 | } | |
5275 | ||
5276 | void unit_export_state_files(Unit *u) { | |
5277 | const ExecContext *c; | |
5278 | ||
5279 | assert(u); | |
5280 | ||
5281 | if (!u->id) | |
5282 | return; | |
5283 | ||
5284 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5285 | return; | |
5286 | ||
638cece4 | 5287 | if (MANAGER_IS_TEST_RUN(u->manager)) |
8f632531 LP |
5288 | return; |
5289 | ||
d3070fbd LP |
5290 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5291 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5292 | * the IPC system itself and PID 1 also log to the journal. | |
5293 | * | |
5294 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5295 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5296 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5297 | * namespace at least. | |
5298 | * | |
5299 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5300 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5301 | * them with one. */ | |
5302 | ||
5303 | (void) unit_export_invocation_id(u); | |
5304 | ||
5305 | c = unit_get_exec_context(u); | |
5306 | if (c) { | |
5307 | (void) unit_export_log_level_max(u, c); | |
5308 | (void) unit_export_log_extra_fields(u, c); | |
5309 | } | |
5310 | } | |
5311 | ||
5312 | void unit_unlink_state_files(Unit *u) { | |
5313 | const char *p; | |
5314 | ||
5315 | assert(u); | |
5316 | ||
5317 | if (!u->id) | |
5318 | return; | |
5319 | ||
5320 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5321 | return; | |
5322 | ||
5323 | /* Undoes the effect of unit_export_state() */ | |
5324 | ||
5325 | if (u->exported_invocation_id) { | |
5326 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
5327 | (void) unlink(p); | |
5328 | ||
5329 | u->exported_invocation_id = false; | |
5330 | } | |
5331 | ||
5332 | if (u->exported_log_level_max) { | |
5333 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5334 | (void) unlink(p); | |
5335 | ||
5336 | u->exported_log_level_max = false; | |
5337 | } | |
5338 | ||
5339 | if (u->exported_log_extra_fields) { | |
5340 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5341 | (void) unlink(p); | |
5342 | ||
5343 | u->exported_log_extra_fields = false; | |
5344 | } | |
5345 | } | |
5afe510c | 5346 | |
3c7416b6 LP |
5347 | int unit_prepare_exec(Unit *u) { |
5348 | int r; | |
5349 | ||
5350 | assert(u); | |
5351 | ||
5352 | /* Prepares everything so that we can fork of a process for this unit */ | |
5353 | ||
5354 | (void) unit_realize_cgroup(u); | |
5355 | ||
5356 | if (u->reset_accounting) { | |
5357 | (void) unit_reset_cpu_accounting(u); | |
5358 | (void) unit_reset_ip_accounting(u); | |
5359 | u->reset_accounting = false; | |
5360 | } | |
5361 | ||
5362 | unit_export_state_files(u); | |
5363 | ||
5364 | r = unit_setup_exec_runtime(u); | |
5365 | if (r < 0) | |
5366 | return r; | |
5367 | ||
5368 | r = unit_setup_dynamic_creds(u); | |
5369 | if (r < 0) | |
5370 | return r; | |
5371 | ||
5372 | return 0; | |
5373 | } | |
5374 | ||
a4634b21 LP |
5375 | static void log_leftover(pid_t pid, int sig, void *userdata) { |
5376 | _cleanup_free_ char *comm = NULL; | |
5377 | ||
5378 | (void) get_process_comm(pid, &comm); | |
5379 | ||
5380 | if (comm && comm[0] == '(') /* Most likely our own helper process (PAM?), ignore */ | |
5381 | return; | |
5382 | ||
5383 | log_unit_warning(userdata, | |
5384 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5385 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5386 | pid, strna(comm)); | |
5387 | } | |
5388 | ||
5389 | void unit_warn_leftover_processes(Unit *u) { | |
5390 | assert(u); | |
5391 | ||
5392 | (void) unit_pick_cgroup_path(u); | |
5393 | ||
5394 | if (!u->cgroup_path) | |
5395 | return; | |
5396 | ||
5397 | (void) cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_leftover, u); | |
5398 | } | |
5399 | ||
bb2c7685 LP |
5400 | bool unit_needs_console(Unit *u) { |
5401 | ExecContext *ec; | |
5402 | UnitActiveState state; | |
5403 | ||
5404 | assert(u); | |
5405 | ||
5406 | state = unit_active_state(u); | |
5407 | ||
5408 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5409 | return false; | |
5410 | ||
5411 | if (UNIT_VTABLE(u)->needs_console) | |
5412 | return UNIT_VTABLE(u)->needs_console(u); | |
5413 | ||
5414 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5415 | ec = unit_get_exec_context(u); | |
5416 | if (!ec) | |
5417 | return false; | |
5418 | ||
5419 | return exec_context_may_touch_console(ec); | |
5420 | } | |
5421 | ||
81e9871e LP |
5422 | const char *unit_label_path(Unit *u) { |
5423 | const char *p; | |
5424 | ||
5425 | /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off | |
5426 | * when validating access checks. */ | |
5427 | ||
5428 | p = u->source_path ?: u->fragment_path; | |
5429 | if (!p) | |
5430 | return NULL; | |
5431 | ||
5432 | /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */ | |
5433 | if (path_equal(p, "/dev/null")) | |
5434 | return NULL; | |
5435 | ||
5436 | return p; | |
5437 | } | |
5438 | ||
6592b975 LP |
5439 | int unit_pid_attachable(Unit *u, pid_t pid, sd_bus_error *error) { |
5440 | int r; | |
5441 | ||
5442 | assert(u); | |
5443 | ||
5444 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5445 | * and not a kernel thread either */ | |
5446 | ||
5447 | /* First, a simple range check */ | |
5448 | if (!pid_is_valid(pid)) | |
5449 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier " PID_FMT " is not valid.", pid); | |
5450 | ||
5451 | /* Some extra safety check */ | |
5452 | if (pid == 1 || pid == getpid_cached()) | |
3fe91079 | 5453 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager process, refusing.", pid); |
6592b975 LP |
5454 | |
5455 | /* Don't even begin to bother with kernel threads */ | |
5456 | r = is_kernel_thread(pid); | |
5457 | if (r == -ESRCH) | |
5458 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid); | |
5459 | if (r < 0) | |
5460 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid); | |
5461 | if (r > 0) | |
5462 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid); | |
5463 | ||
5464 | return 0; | |
5465 | } | |
5466 | ||
5afe510c LP |
5467 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
5468 | [COLLECT_INACTIVE] = "inactive", | |
5469 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
5470 | }; | |
5471 | ||
5472 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); |