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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a7334b09 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2010 Lennart Poettering | |
a7334b09 LP |
6 | ***/ |
7 | ||
87f0e418 | 8 | #include <errno.h> |
0301abf4 | 9 | #include <stdlib.h> |
4f5dd394 | 10 | #include <string.h> |
4c253ed1 | 11 | #include <sys/prctl.h> |
45fb0699 | 12 | #include <sys/stat.h> |
4f5dd394 | 13 | #include <unistd.h> |
87f0e418 | 14 | |
718db961 LP |
15 | #include "sd-id128.h" |
16 | #include "sd-messages.h" | |
4f5dd394 | 17 | |
b5efdb8a | 18 | #include "alloc-util.h" |
4f5dd394 LP |
19 | #include "bus-common-errors.h" |
20 | #include "bus-util.h" | |
c6c18be3 | 21 | #include "cgroup-util.h" |
4f5dd394 LP |
22 | #include "dbus-unit.h" |
23 | #include "dbus.h" | |
24 | #include "dropin.h" | |
25 | #include "escape.h" | |
26 | #include "execute.h" | |
6a48d82f | 27 | #include "fd-util.h" |
a5c32cff | 28 | #include "fileio-label.h" |
f97b34a6 | 29 | #include "format-util.h" |
d3070fbd | 30 | #include "fs-util.h" |
4b58153d | 31 | #include "id128-util.h" |
915b1d01 | 32 | #include "io-util.h" |
4f5dd394 LP |
33 | #include "load-dropin.h" |
34 | #include "load-fragment.h" | |
35 | #include "log.h" | |
36 | #include "macro.h" | |
37 | #include "missing.h" | |
38 | #include "mkdir.h" | |
6bedfcbb | 39 | #include "parse-util.h" |
4f5dd394 | 40 | #include "path-util.h" |
0b452006 | 41 | #include "process-util.h" |
4f5dd394 | 42 | #include "set.h" |
6eb7c172 | 43 | #include "signal-util.h" |
d3070fbd | 44 | #include "sparse-endian.h" |
e9db43d5 | 45 | #include "special.h" |
2e59b241 | 46 | #include "specifier.h" |
8fcde012 | 47 | #include "stat-util.h" |
d054f0a4 | 48 | #include "stdio-util.h" |
5afe510c | 49 | #include "string-table.h" |
07630cea | 50 | #include "string-util.h" |
4f5dd394 | 51 | #include "strv.h" |
4f4afc88 | 52 | #include "umask-util.h" |
4f5dd394 | 53 | #include "unit-name.h" |
e9db43d5 | 54 | #include "unit.h" |
b1d4f8e1 LP |
55 | #include "user-util.h" |
56 | #include "virt.h" | |
87f0e418 LP |
57 | |
58 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
59 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 LP |
60 | [UNIT_SOCKET] = &socket_vtable, |
61 | [UNIT_TARGET] = &target_vtable, | |
62 | [UNIT_DEVICE] = &device_vtable, | |
63 | [UNIT_MOUNT] = &mount_vtable, | |
64 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 65 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 66 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 67 | [UNIT_PATH] = &path_vtable, |
6c12b52e | 68 | [UNIT_SLICE] = &slice_vtable, |
5afe510c | 69 | [UNIT_SCOPE] = &scope_vtable, |
87f0e418 LP |
70 | }; |
71 | ||
f2341e0a | 72 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 73 | |
7d17cfbc | 74 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
75 | Unit *u; |
76 | ||
77 | assert(m); | |
ac155bb8 | 78 | assert(size >= sizeof(Unit)); |
87f0e418 | 79 | |
7d17cfbc MS |
80 | u = malloc0(size); |
81 | if (!u) | |
87f0e418 LP |
82 | return NULL; |
83 | ||
d5099efc | 84 | u->names = set_new(&string_hash_ops); |
6b430fdb ZJS |
85 | if (!u->names) |
86 | return mfree(u); | |
87f0e418 | 87 | |
ac155bb8 MS |
88 | u->manager = m; |
89 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
90 | u->default_dependencies = true; |
91 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 92 | u->unit_file_preset = -1; |
d420282b | 93 | u->on_failure_job_mode = JOB_REPLACE; |
efdb0237 | 94 | u->cgroup_inotify_wd = -1; |
36c16a7c | 95 | u->job_timeout = USEC_INFINITY; |
a2df3ea4 | 96 | u->job_running_timeout = USEC_INFINITY; |
00d9ef85 LP |
97 | u->ref_uid = UID_INVALID; |
98 | u->ref_gid = GID_INVALID; | |
fe700f46 | 99 | u->cpu_usage_last = NSEC_INFINITY; |
60c728ad | 100 | u->cgroup_bpf_state = UNIT_CGROUP_BPF_INVALIDATED; |
87f0e418 | 101 | |
6a48d82f DM |
102 | u->ip_accounting_ingress_map_fd = -1; |
103 | u->ip_accounting_egress_map_fd = -1; | |
104 | u->ipv4_allow_map_fd = -1; | |
105 | u->ipv6_allow_map_fd = -1; | |
106 | u->ipv4_deny_map_fd = -1; | |
107 | u->ipv6_deny_map_fd = -1; | |
108 | ||
2e59b241 LP |
109 | u->last_section_private = -1; |
110 | ||
6bf0f408 | 111 | RATELIMIT_INIT(u->start_limit, m->default_start_limit_interval, m->default_start_limit_burst); |
67bfdc97 | 112 | RATELIMIT_INIT(u->auto_stop_ratelimit, 10 * USEC_PER_SEC, 16); |
bea355da | 113 | |
87f0e418 LP |
114 | return u; |
115 | } | |
116 | ||
a581e45a | 117 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
dc409696 | 118 | _cleanup_(unit_freep) Unit *u = NULL; |
a581e45a LP |
119 | int r; |
120 | ||
121 | u = unit_new(m, size); | |
122 | if (!u) | |
123 | return -ENOMEM; | |
124 | ||
125 | r = unit_add_name(u, name); | |
dc409696 | 126 | if (r < 0) |
a581e45a | 127 | return r; |
a581e45a | 128 | |
1cc6c93a YW |
129 | *ret = TAKE_PTR(u); |
130 | ||
a581e45a LP |
131 | return r; |
132 | } | |
133 | ||
f278026d LP |
134 | bool unit_has_name(Unit *u, const char *name) { |
135 | assert(u); | |
136 | assert(name); | |
137 | ||
390bc2b1 | 138 | return set_contains(u->names, (char*) name); |
f278026d LP |
139 | } |
140 | ||
598459ce LP |
141 | static void unit_init(Unit *u) { |
142 | CGroupContext *cc; | |
143 | ExecContext *ec; | |
144 | KillContext *kc; | |
145 | ||
146 | assert(u); | |
147 | assert(u->manager); | |
148 | assert(u->type >= 0); | |
149 | ||
150 | cc = unit_get_cgroup_context(u); | |
151 | if (cc) { | |
152 | cgroup_context_init(cc); | |
153 | ||
154 | /* Copy in the manager defaults into the cgroup | |
155 | * context, _before_ the rest of the settings have | |
156 | * been initialized */ | |
157 | ||
158 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
13c31542 | 159 | cc->io_accounting = u->manager->default_io_accounting; |
377bfd2d | 160 | cc->ip_accounting = u->manager->default_ip_accounting; |
598459ce LP |
161 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
162 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 163 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
6a48d82f | 164 | cc->ip_accounting = u->manager->default_ip_accounting; |
0af20ea2 LP |
165 | |
166 | if (u->type != UNIT_SLICE) | |
167 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
168 | } |
169 | ||
170 | ec = unit_get_exec_context(u); | |
b1edf445 | 171 | if (ec) { |
598459ce LP |
172 | exec_context_init(ec); |
173 | ||
b1edf445 | 174 | ec->keyring_mode = MANAGER_IS_SYSTEM(u->manager) ? |
00f5ad93 | 175 | EXEC_KEYRING_SHARED : EXEC_KEYRING_INHERIT; |
b1edf445 LP |
176 | } |
177 | ||
598459ce LP |
178 | kc = unit_get_kill_context(u); |
179 | if (kc) | |
180 | kill_context_init(kc); | |
181 | ||
182 | if (UNIT_VTABLE(u)->init) | |
183 | UNIT_VTABLE(u)->init(u); | |
184 | } | |
185 | ||
87f0e418 | 186 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 187 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 188 | UnitType t; |
87f0e418 LP |
189 | int r; |
190 | ||
191 | assert(u); | |
192 | assert(text); | |
193 | ||
7410616c | 194 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 195 | |
ac155bb8 | 196 | if (!u->instance) |
9e2f7c11 | 197 | return -EINVAL; |
87f0e418 | 198 | |
7410616c LP |
199 | r = unit_name_replace_instance(text, u->instance, &s); |
200 | if (r < 0) | |
201 | return r; | |
202 | } else { | |
9e2f7c11 | 203 | s = strdup(text); |
7410616c LP |
204 | if (!s) |
205 | return -ENOMEM; | |
206 | } | |
87f0e418 | 207 | |
7410616c LP |
208 | if (set_contains(u->names, s)) |
209 | return 0; | |
210 | if (hashmap_contains(u->manager->units, s)) | |
211 | return -EEXIST; | |
212 | ||
213 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 214 | return -EINVAL; |
e537352b | 215 | |
7410616c LP |
216 | t = unit_name_to_type(s); |
217 | if (t < 0) | |
218 | return -EINVAL; | |
87f0e418 | 219 | |
598459ce LP |
220 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
221 | return -EINVAL; | |
87f0e418 | 222 | |
e48614c4 ZJS |
223 | r = unit_name_to_instance(s, &i); |
224 | if (r < 0) | |
598459ce | 225 | return r; |
87f0e418 | 226 | |
ce99c68a | 227 | if (i && !unit_type_may_template(t)) |
598459ce | 228 | return -EINVAL; |
9e2f7c11 | 229 | |
276c3e78 | 230 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
231 | * but not both. Note that we do allow names with different |
232 | * instance names however! */ | |
598459ce LP |
233 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
234 | return -EINVAL; | |
9e2f7c11 | 235 | |
8a993b61 | 236 | if (!unit_type_may_alias(t) && !set_isempty(u->names)) |
598459ce | 237 | return -EEXIST; |
9e2f7c11 | 238 | |
598459ce LP |
239 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
240 | return -E2BIG; | |
4f0f902f | 241 | |
e48614c4 | 242 | r = set_put(u->names, s); |
7410616c | 243 | if (r < 0) |
598459ce | 244 | return r; |
7410616c | 245 | assert(r > 0); |
87f0e418 | 246 | |
e48614c4 ZJS |
247 | r = hashmap_put(u->manager->units, s, u); |
248 | if (r < 0) { | |
7410616c | 249 | (void) set_remove(u->names, s); |
598459ce | 250 | return r; |
87f0e418 LP |
251 | } |
252 | ||
ac155bb8 | 253 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
254 | u->type = t; |
255 | u->id = s; | |
1cc6c93a | 256 | u->instance = TAKE_PTR(i); |
9e2f7c11 | 257 | |
71fda00f | 258 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 259 | |
598459ce | 260 | unit_init(u); |
598459ce | 261 | } |
9e2f7c11 | 262 | |
598459ce | 263 | s = NULL; |
9e2f7c11 | 264 | |
598459ce LP |
265 | unit_add_to_dbus_queue(u); |
266 | return 0; | |
87f0e418 LP |
267 | } |
268 | ||
0ae97ec1 | 269 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 270 | _cleanup_free_ char *t = NULL; |
598459ce | 271 | char *s, *i; |
276c3e78 | 272 | int r; |
0ae97ec1 LP |
273 | |
274 | assert(u); | |
275 | assert(name); | |
276 | ||
7410616c | 277 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 278 | |
ac155bb8 | 279 | if (!u->instance) |
9e2f7c11 LP |
280 | return -EINVAL; |
281 | ||
7410616c LP |
282 | r = unit_name_replace_instance(name, u->instance, &t); |
283 | if (r < 0) | |
284 | return r; | |
9e2f7c11 LP |
285 | |
286 | name = t; | |
287 | } | |
288 | ||
0ae97ec1 | 289 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 290 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 291 | if (!s) |
0ae97ec1 LP |
292 | return -ENOENT; |
293 | ||
7410616c | 294 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
295 | r = unit_name_to_instance(s, &i); |
296 | if (r < 0) | |
276c3e78 LP |
297 | return r; |
298 | ||
ac155bb8 | 299 | u->id = s; |
276c3e78 | 300 | |
ac155bb8 MS |
301 | free(u->instance); |
302 | u->instance = i; | |
276c3e78 | 303 | |
c1e1601e | 304 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 305 | |
0ae97ec1 LP |
306 | return 0; |
307 | } | |
308 | ||
f50e0a01 | 309 | int unit_set_description(Unit *u, const char *description) { |
84b26d51 | 310 | int r; |
f50e0a01 LP |
311 | |
312 | assert(u); | |
313 | ||
84b26d51 LP |
314 | r = free_and_strdup(&u->description, empty_to_null(description)); |
315 | if (r < 0) | |
316 | return r; | |
317 | if (r > 0) | |
318 | unit_add_to_dbus_queue(u); | |
c1e1601e | 319 | |
f50e0a01 LP |
320 | return 0; |
321 | } | |
322 | ||
f2f725e5 | 323 | bool unit_may_gc(Unit *u) { |
a354329f | 324 | UnitActiveState state; |
e98b2fbb | 325 | int r; |
5afe510c | 326 | |
701cc384 LP |
327 | assert(u); |
328 | ||
f2f725e5 ZJS |
329 | /* Checks whether the unit is ready to be unloaded for garbage collection. |
330 | * Returns true when the unit may be collected, and false if there's some | |
2641f02e ZJS |
331 | * reason to keep it loaded. |
332 | * | |
333 | * References from other units are *not* checked here. Instead, this is done | |
334 | * in unit_gc_sweep(), but using markers to properly collect dependency loops. | |
335 | */ | |
5afe510c | 336 | |
a354329f | 337 | if (u->job) |
f2f725e5 | 338 | return false; |
701cc384 | 339 | |
a354329f | 340 | if (u->nop_job) |
f2f725e5 | 341 | return false; |
6c073082 | 342 | |
a354329f LP |
343 | state = unit_active_state(u); |
344 | ||
7eb2a8a1 | 345 | /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */ |
a354329f LP |
346 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && |
347 | UNIT_VTABLE(u)->release_resources) | |
7eb2a8a1 | 348 | UNIT_VTABLE(u)->release_resources(u); |
a354329f | 349 | |
f5869324 | 350 | if (u->perpetual) |
f2f725e5 | 351 | return false; |
9d576438 | 352 | |
05a98afd | 353 | if (sd_bus_track_count(u->bus_track) > 0) |
f2f725e5 | 354 | return false; |
05a98afd | 355 | |
5afe510c LP |
356 | /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */ |
357 | switch (u->collect_mode) { | |
358 | ||
359 | case COLLECT_INACTIVE: | |
360 | if (state != UNIT_INACTIVE) | |
f2f725e5 | 361 | return false; |
5afe510c LP |
362 | |
363 | break; | |
364 | ||
365 | case COLLECT_INACTIVE_OR_FAILED: | |
366 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
f2f725e5 | 367 | return false; |
5afe510c LP |
368 | |
369 | break; | |
370 | ||
371 | default: | |
372 | assert_not_reached("Unknown garbage collection mode"); | |
373 | } | |
374 | ||
e98b2fbb LP |
375 | if (u->cgroup_path) { |
376 | /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay | |
377 | * around. Units with active processes should never be collected. */ | |
378 | ||
379 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
380 | if (r < 0) | |
381 | log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", u->cgroup_path); | |
382 | if (r <= 0) | |
f2f725e5 | 383 | return false; |
e98b2fbb LP |
384 | } |
385 | ||
f2f725e5 ZJS |
386 | if (UNIT_VTABLE(u)->may_gc && !UNIT_VTABLE(u)->may_gc(u)) |
387 | return false; | |
701cc384 | 388 | |
f2f725e5 | 389 | return true; |
701cc384 LP |
390 | } |
391 | ||
87f0e418 LP |
392 | void unit_add_to_load_queue(Unit *u) { |
393 | assert(u); | |
ac155bb8 | 394 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 395 | |
ac155bb8 | 396 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
397 | return; |
398 | ||
71fda00f | 399 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 400 | u->in_load_queue = true; |
87f0e418 LP |
401 | } |
402 | ||
23a177ef LP |
403 | void unit_add_to_cleanup_queue(Unit *u) { |
404 | assert(u); | |
405 | ||
ac155bb8 | 406 | if (u->in_cleanup_queue) |
23a177ef LP |
407 | return; |
408 | ||
71fda00f | 409 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 410 | u->in_cleanup_queue = true; |
23a177ef LP |
411 | } |
412 | ||
701cc384 LP |
413 | void unit_add_to_gc_queue(Unit *u) { |
414 | assert(u); | |
415 | ||
ac155bb8 | 416 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
417 | return; |
418 | ||
f2f725e5 | 419 | if (!unit_may_gc(u)) |
701cc384 LP |
420 | return; |
421 | ||
c5a97ed1 | 422 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 423 | u->in_gc_queue = true; |
701cc384 LP |
424 | } |
425 | ||
c1e1601e LP |
426 | void unit_add_to_dbus_queue(Unit *u) { |
427 | assert(u); | |
ac155bb8 | 428 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 429 | |
ac155bb8 | 430 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
431 | return; |
432 | ||
a567261a | 433 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 434 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 435 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 436 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 437 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
438 | return; |
439 | } | |
440 | ||
71fda00f | 441 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 442 | u->in_dbus_queue = true; |
c1e1601e LP |
443 | } |
444 | ||
eef85c4a | 445 | static void bidi_set_free(Unit *u, Hashmap *h) { |
87f0e418 | 446 | Unit *other; |
eef85c4a LP |
447 | Iterator i; |
448 | void *v; | |
87f0e418 LP |
449 | |
450 | assert(u); | |
451 | ||
eef85c4a | 452 | /* Frees the hashmap and makes sure we are dropped from the inverse pointers */ |
87f0e418 | 453 | |
eef85c4a | 454 | HASHMAP_FOREACH_KEY(v, other, h, i) { |
87f0e418 LP |
455 | UnitDependency d; |
456 | ||
457 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
eef85c4a | 458 | hashmap_remove(other->dependencies[d], u); |
701cc384 LP |
459 | |
460 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
461 | } |
462 | ||
eef85c4a | 463 | hashmap_free(h); |
87f0e418 LP |
464 | } |
465 | ||
c2756a68 LP |
466 | static void unit_remove_transient(Unit *u) { |
467 | char **i; | |
468 | ||
469 | assert(u); | |
470 | ||
471 | if (!u->transient) | |
472 | return; | |
473 | ||
474 | if (u->fragment_path) | |
3f5e8115 | 475 | (void) unlink(u->fragment_path); |
c2756a68 LP |
476 | |
477 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 478 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 479 | |
39591351 LP |
480 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
481 | if (!p) | |
482 | continue; | |
483 | ||
484 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
485 | if (!pp) | |
486 | continue; | |
487 | ||
488 | /* Only drop transient drop-ins */ | |
489 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
490 | continue; | |
c2756a68 | 491 | |
39591351 LP |
492 | (void) unlink(*i); |
493 | (void) rmdir(p); | |
c2756a68 LP |
494 | } |
495 | } | |
496 | ||
a57f7e2c | 497 | static void unit_free_requires_mounts_for(Unit *u) { |
eef85c4a | 498 | assert(u); |
a57f7e2c | 499 | |
eef85c4a LP |
500 | for (;;) { |
501 | _cleanup_free_ char *path; | |
a57f7e2c | 502 | |
eef85c4a LP |
503 | path = hashmap_steal_first_key(u->requires_mounts_for); |
504 | if (!path) | |
505 | break; | |
506 | else { | |
507 | char s[strlen(path) + 1]; | |
a57f7e2c | 508 | |
eef85c4a LP |
509 | PATH_FOREACH_PREFIX_MORE(s, path) { |
510 | char *y; | |
511 | Set *x; | |
512 | ||
513 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
514 | if (!x) | |
515 | continue; | |
a57f7e2c | 516 | |
eef85c4a | 517 | (void) set_remove(x, u); |
a57f7e2c | 518 | |
eef85c4a LP |
519 | if (set_isempty(x)) { |
520 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
521 | free(y); | |
522 | set_free(x); | |
523 | } | |
a57f7e2c LP |
524 | } |
525 | } | |
526 | } | |
527 | ||
eef85c4a | 528 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
a57f7e2c LP |
529 | } |
530 | ||
598459ce LP |
531 | static void unit_done(Unit *u) { |
532 | ExecContext *ec; | |
533 | CGroupContext *cc; | |
534 | ||
535 | assert(u); | |
536 | ||
537 | if (u->type < 0) | |
538 | return; | |
539 | ||
540 | if (UNIT_VTABLE(u)->done) | |
541 | UNIT_VTABLE(u)->done(u); | |
542 | ||
543 | ec = unit_get_exec_context(u); | |
544 | if (ec) | |
545 | exec_context_done(ec); | |
546 | ||
547 | cc = unit_get_cgroup_context(u); | |
548 | if (cc) | |
549 | cgroup_context_done(cc); | |
550 | } | |
551 | ||
87f0e418 LP |
552 | void unit_free(Unit *u) { |
553 | UnitDependency d; | |
554 | Iterator i; | |
555 | char *t; | |
556 | ||
c9d5c9c0 LP |
557 | if (!u) |
558 | return; | |
87f0e418 | 559 | |
50fb00b7 | 560 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 561 | |
2c289ea8 | 562 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
563 | unit_remove_transient(u); |
564 | ||
c1e1601e LP |
565 | bus_unit_send_removed_signal(u); |
566 | ||
598459ce | 567 | unit_done(u); |
a013b84b | 568 | |
cf9fd508 DM |
569 | sd_bus_slot_unref(u->match_bus_slot); |
570 | ||
05a98afd LP |
571 | sd_bus_track_unref(u->bus_track); |
572 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
573 | ||
a57f7e2c LP |
574 | unit_free_requires_mounts_for(u); |
575 | ||
ac155bb8 MS |
576 | SET_FOREACH(t, u->names, i) |
577 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 578 | |
4b58153d LP |
579 | if (!sd_id128_is_null(u->invocation_id)) |
580 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
581 | ||
97e7d748 MS |
582 | if (u->job) { |
583 | Job *j = u->job; | |
584 | job_uninstall(j); | |
585 | job_free(j); | |
586 | } | |
964e0949 | 587 | |
e0209d83 MS |
588 | if (u->nop_job) { |
589 | Job *j = u->nop_job; | |
590 | job_uninstall(j); | |
591 | job_free(j); | |
592 | } | |
593 | ||
964e0949 | 594 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 595 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 596 | |
adefcf28 LP |
597 | if (u->on_console) |
598 | manager_unref_console(u->manager); | |
599 | ||
efdb0237 | 600 | unit_release_cgroup(u); |
72673e86 | 601 | |
d3070fbd LP |
602 | if (!MANAGER_IS_RELOADING(u->manager)) |
603 | unit_unlink_state_files(u); | |
604 | ||
00d9ef85 LP |
605 | unit_unref_uid_gid(u, false); |
606 | ||
5269eb6b | 607 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 608 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 609 | |
a911bb9a LP |
610 | unit_unwatch_all_pids(u); |
611 | ||
702a2d8f | 612 | unit_ref_unset(&u->slice); |
7f7d01ed ZJS |
613 | while (u->refs_by_target) |
614 | unit_ref_unset(u->refs_by_target); | |
57020a3a | 615 | |
ac155bb8 | 616 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 617 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 618 | |
ac155bb8 | 619 | if (u->in_load_queue) |
71fda00f | 620 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 621 | |
ac155bb8 | 622 | if (u->in_dbus_queue) |
71fda00f | 623 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 624 | |
a2d72e26 | 625 | if (u->in_gc_queue) |
c5a97ed1 | 626 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 627 | |
91a6073e LP |
628 | if (u->in_cgroup_realize_queue) |
629 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 630 | |
09e24654 LP |
631 | if (u->in_cgroup_empty_queue) |
632 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
633 | ||
1bdf2790 ZJS |
634 | if (u->in_cleanup_queue) |
635 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
adefcf28 | 636 | |
19496554 MS |
637 | if (u->in_target_deps_queue) |
638 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
639 | ||
6a48d82f DM |
640 | safe_close(u->ip_accounting_ingress_map_fd); |
641 | safe_close(u->ip_accounting_egress_map_fd); | |
72673e86 | 642 | |
6a48d82f DM |
643 | safe_close(u->ipv4_allow_map_fd); |
644 | safe_close(u->ipv6_allow_map_fd); | |
645 | safe_close(u->ipv4_deny_map_fd); | |
646 | safe_close(u->ipv6_deny_map_fd); | |
d3070fbd | 647 | |
6a48d82f | 648 | bpf_program_unref(u->ip_bpf_ingress); |
aa2b6f1d | 649 | bpf_program_unref(u->ip_bpf_ingress_installed); |
6a48d82f | 650 | bpf_program_unref(u->ip_bpf_egress); |
aa2b6f1d | 651 | bpf_program_unref(u->ip_bpf_egress_installed); |
00d9ef85 | 652 | |
a946fa9b ZJS |
653 | condition_free_list(u->conditions); |
654 | condition_free_list(u->asserts); | |
f755e3b7 | 655 | |
ac155bb8 | 656 | free(u->description); |
49dbfa7b | 657 | strv_free(u->documentation); |
ac155bb8 | 658 | free(u->fragment_path); |
1b64d026 | 659 | free(u->source_path); |
ae7a7182 | 660 | strv_free(u->dropin_paths); |
ac155bb8 | 661 | free(u->instance); |
87f0e418 | 662 | |
f189ab18 LP |
663 | free(u->job_timeout_reboot_arg); |
664 | ||
ac155bb8 | 665 | set_free_free(u->names); |
87f0e418 | 666 | |
6bf0f408 LP |
667 | free(u->reboot_arg); |
668 | ||
87f0e418 LP |
669 | free(u); |
670 | } | |
671 | ||
672 | UnitActiveState unit_active_state(Unit *u) { | |
673 | assert(u); | |
674 | ||
ac155bb8 | 675 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
676 | return unit_active_state(unit_follow_merge(u)); |
677 | ||
678 | /* After a reload it might happen that a unit is not correctly | |
679 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 680 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
681 | |
682 | return UNIT_VTABLE(u)->active_state(u); | |
683 | } | |
684 | ||
10a94420 LP |
685 | const char* unit_sub_state_to_string(Unit *u) { |
686 | assert(u); | |
687 | ||
688 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
689 | } | |
690 | ||
eef85c4a LP |
691 | static int set_complete_move(Set **s, Set **other) { |
692 | assert(s); | |
693 | assert(other); | |
694 | ||
695 | if (!other) | |
696 | return 0; | |
697 | ||
698 | if (*s) | |
699 | return set_move(*s, *other); | |
ae2a15bc LP |
700 | else |
701 | *s = TAKE_PTR(*other); | |
7c0b05e5 | 702 | |
eef85c4a LP |
703 | return 0; |
704 | } | |
705 | ||
706 | static int hashmap_complete_move(Hashmap **s, Hashmap **other) { | |
23a177ef LP |
707 | assert(s); |
708 | assert(other); | |
87f0e418 | 709 | |
23a177ef | 710 | if (!*other) |
7c0b05e5 | 711 | return 0; |
87f0e418 | 712 | |
eef85c4a LP |
713 | if (*s) |
714 | return hashmap_move(*s, *other); | |
ae2a15bc LP |
715 | else |
716 | *s = TAKE_PTR(*other); | |
7c0b05e5 MS |
717 | |
718 | return 0; | |
23a177ef | 719 | } |
87f0e418 | 720 | |
7c0b05e5 | 721 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
722 | char *t; |
723 | Iterator i; | |
7c0b05e5 | 724 | int r; |
87f0e418 | 725 | |
23a177ef LP |
726 | assert(u); |
727 | assert(other); | |
728 | ||
eef85c4a | 729 | r = set_complete_move(&u->names, &other->names); |
7c0b05e5 MS |
730 | if (r < 0) |
731 | return r; | |
23a177ef | 732 | |
ac155bb8 MS |
733 | set_free_free(other->names); |
734 | other->names = NULL; | |
735 | other->id = NULL; | |
23a177ef | 736 | |
ac155bb8 MS |
737 | SET_FOREACH(t, u->names, i) |
738 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
739 | |
740 | return 0; | |
87f0e418 LP |
741 | } |
742 | ||
09a65f92 MS |
743 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
744 | unsigned n_reserve; | |
745 | ||
746 | assert(u); | |
747 | assert(other); | |
748 | assert(d < _UNIT_DEPENDENCY_MAX); | |
749 | ||
750 | /* | |
751 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 752 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
753 | * as a whole to u by complete_move(). |
754 | */ | |
755 | if (!u->dependencies[d]) | |
756 | return 0; | |
757 | ||
758 | /* merge_dependencies() will skip a u-on-u dependency */ | |
eef85c4a | 759 | n_reserve = hashmap_size(other->dependencies[d]) - !!hashmap_get(other->dependencies[d], u); |
09a65f92 | 760 | |
eef85c4a | 761 | return hashmap_reserve(u->dependencies[d], n_reserve); |
09a65f92 MS |
762 | } |
763 | ||
d1fab3fe | 764 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
765 | Iterator i; |
766 | Unit *back; | |
eef85c4a | 767 | void *v; |
87f0e418 | 768 | int r; |
23a177ef | 769 | |
eef85c4a LP |
770 | /* Merges all dependencies of type 'd' of the unit 'other' into the deps of the unit 'u' */ |
771 | ||
23a177ef LP |
772 | assert(u); |
773 | assert(other); | |
774 | assert(d < _UNIT_DEPENDENCY_MAX); | |
775 | ||
eef85c4a LP |
776 | /* Fix backwards pointers. Let's iterate through all dependendent units of the other unit. */ |
777 | HASHMAP_FOREACH_KEY(v, back, other->dependencies[d], i) { | |
23a177ef LP |
778 | UnitDependency k; |
779 | ||
eef85c4a LP |
780 | /* Let's now iterate through the dependencies of that dependencies of the other units, looking for |
781 | * pointers back, and let's fix them up, to instead point to 'u'. */ | |
782 | ||
e48614c4 | 783 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff | 784 | if (back == u) { |
eef85c4a LP |
785 | /* Do not add dependencies between u and itself. */ |
786 | if (hashmap_remove(back->dependencies[k], other)) | |
f2341e0a | 787 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff | 788 | } else { |
eef85c4a LP |
789 | UnitDependencyInfo di_u, di_other, di_merged; |
790 | ||
791 | /* Let's drop this dependency between "back" and "other", and let's create it between | |
792 | * "back" and "u" instead. Let's merge the bit masks of the dependency we are moving, | |
793 | * and any such dependency which might already exist */ | |
794 | ||
795 | di_other.data = hashmap_get(back->dependencies[k], other); | |
796 | if (!di_other.data) | |
797 | continue; /* dependency isn't set, let's try the next one */ | |
798 | ||
799 | di_u.data = hashmap_get(back->dependencies[k], u); | |
800 | ||
801 | di_merged = (UnitDependencyInfo) { | |
802 | .origin_mask = di_u.origin_mask | di_other.origin_mask, | |
803 | .destination_mask = di_u.destination_mask | di_other.destination_mask, | |
804 | }; | |
805 | ||
806 | r = hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data); | |
807 | if (r < 0) | |
808 | log_warning_errno(r, "Failed to remove/replace: back=%s other=%s u=%s: %m", back->id, other_id, u->id); | |
809 | assert(r >= 0); | |
810 | ||
811 | /* assert_se(hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data) >= 0); */ | |
e66047ff | 812 | } |
e48614c4 | 813 | } |
eef85c4a | 814 | |
23a177ef LP |
815 | } |
816 | ||
e66047ff | 817 | /* Also do not move dependencies on u to itself */ |
eef85c4a | 818 | back = hashmap_remove(other->dependencies[d], u); |
d1fab3fe | 819 | if (back) |
f2341e0a | 820 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 821 | |
7c0b05e5 | 822 | /* The move cannot fail. The caller must have performed a reservation. */ |
eef85c4a | 823 | assert_se(hashmap_complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); |
23a177ef | 824 | |
eef85c4a | 825 | other->dependencies[d] = hashmap_free(other->dependencies[d]); |
23a177ef LP |
826 | } |
827 | ||
828 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 829 | UnitDependency d; |
d1fab3fe | 830 | const char *other_id = NULL; |
09a65f92 | 831 | int r; |
87f0e418 LP |
832 | |
833 | assert(u); | |
834 | assert(other); | |
ac155bb8 MS |
835 | assert(u->manager == other->manager); |
836 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 837 | |
cc916967 LP |
838 | other = unit_follow_merge(other); |
839 | ||
23a177ef LP |
840 | if (other == u) |
841 | return 0; | |
842 | ||
ac155bb8 | 843 | if (u->type != other->type) |
9e2f7c11 LP |
844 | return -EINVAL; |
845 | ||
ac155bb8 | 846 | if (!u->instance != !other->instance) |
87f0e418 LP |
847 | return -EINVAL; |
848 | ||
8a993b61 | 849 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
850 | return -EEXIST; |
851 | ||
ec2ce0c5 | 852 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 853 | return -EEXIST; |
87f0e418 | 854 | |
ac155bb8 | 855 | if (other->job) |
819e213f LP |
856 | return -EEXIST; |
857 | ||
e0209d83 MS |
858 | if (other->nop_job) |
859 | return -EEXIST; | |
860 | ||
fdf20a31 | 861 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
862 | return -EEXIST; |
863 | ||
d1fab3fe ZJS |
864 | if (other->id) |
865 | other_id = strdupa(other->id); | |
866 | ||
09a65f92 MS |
867 | /* Make reservations to ensure merge_dependencies() won't fail */ |
868 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
869 | r = reserve_dependencies(u, other, d); | |
870 | /* | |
871 | * We don't rollback reservations if we fail. We don't have | |
872 | * a way to undo reservations. A reservation is not a leak. | |
873 | */ | |
874 | if (r < 0) | |
875 | return r; | |
876 | } | |
877 | ||
87f0e418 | 878 | /* Merge names */ |
7c0b05e5 MS |
879 | r = merge_names(u, other); |
880 | if (r < 0) | |
881 | return r; | |
87f0e418 | 882 | |
57020a3a | 883 | /* Redirect all references */ |
7f7d01ed ZJS |
884 | while (other->refs_by_target) |
885 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
57020a3a | 886 | |
87f0e418 LP |
887 | /* Merge dependencies */ |
888 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 889 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 890 | |
ac155bb8 MS |
891 | other->load_state = UNIT_MERGED; |
892 | other->merged_into = u; | |
23a177ef | 893 | |
3616a49c LP |
894 | /* If there is still some data attached to the other node, we |
895 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 896 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
897 | if (UNIT_VTABLE(other)->done) |
898 | UNIT_VTABLE(other)->done(other); | |
899 | ||
900 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
901 | unit_add_to_cleanup_queue(other); |
902 | ||
903 | return 0; | |
904 | } | |
905 | ||
906 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 907 | _cleanup_free_ char *s = NULL; |
23a177ef | 908 | Unit *other; |
9e2f7c11 | 909 | int r; |
23a177ef LP |
910 | |
911 | assert(u); | |
912 | assert(name); | |
913 | ||
7410616c | 914 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 915 | if (!u->instance) |
9e2f7c11 LP |
916 | return -EINVAL; |
917 | ||
7410616c LP |
918 | r = unit_name_replace_instance(name, u->instance, &s); |
919 | if (r < 0) | |
920 | return r; | |
9e2f7c11 LP |
921 | |
922 | name = s; | |
923 | } | |
924 | ||
c2756a68 | 925 | other = manager_get_unit(u->manager, name); |
7410616c LP |
926 | if (other) |
927 | return unit_merge(u, other); | |
23a177ef | 928 | |
7410616c | 929 | return unit_add_name(u, name); |
23a177ef LP |
930 | } |
931 | ||
932 | Unit* unit_follow_merge(Unit *u) { | |
933 | assert(u); | |
934 | ||
ac155bb8 MS |
935 | while (u->load_state == UNIT_MERGED) |
936 | assert_se(u = u->merged_into); | |
23a177ef LP |
937 | |
938 | return u; | |
939 | } | |
940 | ||
941 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
ada5e276 YW |
942 | ExecDirectoryType dt; |
943 | char **dp; | |
23a177ef LP |
944 | int r; |
945 | ||
946 | assert(u); | |
947 | assert(c); | |
948 | ||
36be24c8 | 949 | if (c->working_directory) { |
eef85c4a | 950 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
951 | if (r < 0) |
952 | return r; | |
953 | } | |
954 | ||
955 | if (c->root_directory) { | |
eef85c4a | 956 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
957 | if (r < 0) |
958 | return r; | |
959 | } | |
960 | ||
915e6d16 | 961 | if (c->root_image) { |
eef85c4a | 962 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
963 | if (r < 0) |
964 | return r; | |
965 | } | |
966 | ||
72fd1768 | 967 | for (dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
968 | if (!u->manager->prefix[dt]) |
969 | continue; | |
970 | ||
971 | STRV_FOREACH(dp, c->directories[dt].paths) { | |
972 | _cleanup_free_ char *p; | |
973 | ||
974 | p = strjoin(u->manager->prefix[dt], "/", *dp); | |
975 | if (!p) | |
976 | return -ENOMEM; | |
977 | ||
eef85c4a | 978 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
979 | if (r < 0) |
980 | return r; | |
981 | } | |
982 | } | |
983 | ||
463d0d15 | 984 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
985 | return 0; |
986 | ||
987 | if (c->private_tmp) { | |
d71f0505 LP |
988 | const char *p; |
989 | ||
990 | FOREACH_STRING(p, "/tmp", "/var/tmp") { | |
eef85c4a | 991 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
d71f0505 LP |
992 | if (r < 0) |
993 | return r; | |
994 | } | |
b46a529c | 995 | |
eef85c4a | 996 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, NULL, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
997 | if (r < 0) |
998 | return r; | |
999 | } | |
1000 | ||
52c239d7 LB |
1001 | if (!IN_SET(c->std_output, |
1002 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1003 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1004 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE) && | |
1005 | !IN_SET(c->std_error, | |
1006 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1007 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1008 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE)) | |
23a177ef LP |
1009 | return 0; |
1010 | ||
1011 | /* If syslog or kernel logging is requested, make sure our own | |
1012 | * logging daemon is run first. */ | |
1013 | ||
eef85c4a | 1014 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1015 | if (r < 0) |
1016 | return r; | |
23a177ef | 1017 | |
87f0e418 LP |
1018 | return 0; |
1019 | } | |
1020 | ||
87f0e418 LP |
1021 | const char *unit_description(Unit *u) { |
1022 | assert(u); | |
1023 | ||
ac155bb8 MS |
1024 | if (u->description) |
1025 | return u->description; | |
87f0e418 | 1026 | |
ac155bb8 | 1027 | return strna(u->id); |
87f0e418 LP |
1028 | } |
1029 | ||
eef85c4a LP |
1030 | static void print_unit_dependency_mask(FILE *f, const char *kind, UnitDependencyMask mask, bool *space) { |
1031 | const struct { | |
1032 | UnitDependencyMask mask; | |
1033 | const char *name; | |
1034 | } table[] = { | |
1035 | { UNIT_DEPENDENCY_FILE, "file" }, | |
1036 | { UNIT_DEPENDENCY_IMPLICIT, "implicit" }, | |
1037 | { UNIT_DEPENDENCY_DEFAULT, "default" }, | |
1038 | { UNIT_DEPENDENCY_UDEV, "udev" }, | |
1039 | { UNIT_DEPENDENCY_PATH, "path" }, | |
1040 | { UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT, "mountinfo-implicit" }, | |
1041 | { UNIT_DEPENDENCY_MOUNTINFO_DEFAULT, "mountinfo-default" }, | |
1042 | { UNIT_DEPENDENCY_PROC_SWAP, "proc-swap" }, | |
1043 | }; | |
1044 | size_t i; | |
1045 | ||
1046 | assert(f); | |
1047 | assert(kind); | |
1048 | assert(space); | |
1049 | ||
1050 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
1051 | ||
1052 | if (mask == 0) | |
1053 | break; | |
1054 | ||
1055 | if ((mask & table[i].mask) == table[i].mask) { | |
1056 | if (*space) | |
1057 | fputc(' ', f); | |
1058 | else | |
1059 | *space = true; | |
1060 | ||
1061 | fputs(kind, f); | |
1062 | fputs("-", f); | |
1063 | fputs(table[i].name, f); | |
1064 | ||
1065 | mask &= ~table[i].mask; | |
1066 | } | |
1067 | } | |
1068 | ||
1069 | assert(mask == 0); | |
1070 | } | |
1071 | ||
87f0e418 | 1072 | void unit_dump(Unit *u, FILE *f, const char *prefix) { |
49dbfa7b | 1073 | char *t, **j; |
87f0e418 LP |
1074 | UnitDependency d; |
1075 | Iterator i; | |
47be870b | 1076 | const char *prefix2; |
173e3821 | 1077 | char |
a483fb59 | 1078 | timestamp0[FORMAT_TIMESTAMP_MAX], |
173e3821 LP |
1079 | timestamp1[FORMAT_TIMESTAMP_MAX], |
1080 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
1081 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
1082 | timestamp4[FORMAT_TIMESTAMP_MAX], |
1083 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 1084 | Unit *following; |
eeaedb7c | 1085 | _cleanup_set_free_ Set *following_set = NULL; |
05a98afd | 1086 | const char *n; |
02638280 LP |
1087 | CGroupMask m; |
1088 | int r; | |
87f0e418 LP |
1089 | |
1090 | assert(u); | |
ac155bb8 | 1091 | assert(u->type >= 0); |
87f0e418 | 1092 | |
4c940960 | 1093 | prefix = strempty(prefix); |
63c372cb | 1094 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
1095 | |
1096 | fprintf(f, | |
40d50879 | 1097 | "%s-> Unit %s:\n" |
87f0e418 | 1098 | "%s\tDescription: %s\n" |
9e2f7c11 | 1099 | "%s\tInstance: %s\n" |
87f0e418 | 1100 | "%s\tUnit Load State: %s\n" |
2fad8195 | 1101 | "%s\tUnit Active State: %s\n" |
b895d155 | 1102 | "%s\tState Change Timestamp: %s\n" |
173e3821 | 1103 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 1104 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 1105 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 1106 | "%s\tInactive Enter Timestamp: %s\n" |
f2f725e5 | 1107 | "%s\tMay GC: %s\n" |
9444b1f2 | 1108 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 1109 | "%s\tTransient: %s\n" |
f5869324 | 1110 | "%s\tPerpetual: %s\n" |
5afe510c | 1111 | "%s\tGarbage Collection Mode: %s\n" |
4ad49000 LP |
1112 | "%s\tSlice: %s\n" |
1113 | "%s\tCGroup: %s\n" | |
aae7e17f | 1114 | "%s\tCGroup realized: %s\n", |
ac155bb8 | 1115 | prefix, u->id, |
87f0e418 | 1116 | prefix, unit_description(u), |
ac155bb8 MS |
1117 | prefix, strna(u->instance), |
1118 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 1119 | prefix, unit_active_state_to_string(unit_active_state(u)), |
a483fb59 | 1120 | prefix, strna(format_timestamp(timestamp0, sizeof(timestamp0), u->state_change_timestamp.realtime)), |
ac155bb8 MS |
1121 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
1122 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
1123 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
1124 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
f2f725e5 | 1125 | prefix, yes_no(unit_may_gc(u)), |
9444b1f2 | 1126 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 1127 | prefix, yes_no(u->transient), |
f5869324 | 1128 | prefix, yes_no(u->perpetual), |
5afe510c | 1129 | prefix, collect_mode_to_string(u->collect_mode), |
4ad49000 LP |
1130 | prefix, strna(unit_slice_name(u)), |
1131 | prefix, strna(u->cgroup_path), | |
aae7e17f FB |
1132 | prefix, yes_no(u->cgroup_realized)); |
1133 | ||
1134 | if (u->cgroup_realized_mask != 0) { | |
1135 | _cleanup_free_ char *s = NULL; | |
1136 | (void) cg_mask_to_string(u->cgroup_realized_mask, &s); | |
02638280 LP |
1137 | fprintf(f, "%s\tCGroup realized mask: %s\n", prefix, strnull(s)); |
1138 | } | |
1139 | if (u->cgroup_enabled_mask != 0) { | |
1140 | _cleanup_free_ char *s = NULL; | |
1141 | (void) cg_mask_to_string(u->cgroup_enabled_mask, &s); | |
1142 | fprintf(f, "%s\tCGroup enabled mask: %s\n", prefix, strnull(s)); | |
1143 | } | |
1144 | m = unit_get_own_mask(u); | |
1145 | if (m != 0) { | |
1146 | _cleanup_free_ char *s = NULL; | |
1147 | (void) cg_mask_to_string(m, &s); | |
1148 | fprintf(f, "%s\tCGroup own mask: %s\n", prefix, strnull(s)); | |
aae7e17f | 1149 | } |
02638280 LP |
1150 | m = unit_get_members_mask(u); |
1151 | if (m != 0) { | |
aae7e17f | 1152 | _cleanup_free_ char *s = NULL; |
02638280 | 1153 | (void) cg_mask_to_string(m, &s); |
aae7e17f FB |
1154 | fprintf(f, "%s\tCGroup members mask: %s\n", prefix, strnull(s)); |
1155 | } | |
0301abf4 | 1156 | |
ac155bb8 | 1157 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
1158 | fprintf(f, "%s\tName: %s\n", prefix, t); |
1159 | ||
4b58153d LP |
1160 | if (!sd_id128_is_null(u->invocation_id)) |
1161 | fprintf(f, "%s\tInvocation ID: " SD_ID128_FORMAT_STR "\n", | |
1162 | prefix, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
1163 | ||
49dbfa7b LP |
1164 | STRV_FOREACH(j, u->documentation) |
1165 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
1166 | ||
eeaedb7c LP |
1167 | following = unit_following(u); |
1168 | if (following) | |
ac155bb8 | 1169 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 1170 | |
eeaedb7c LP |
1171 | r = unit_following_set(u, &following_set); |
1172 | if (r >= 0) { | |
1173 | Unit *other; | |
1174 | ||
1175 | SET_FOREACH(other, following_set, i) | |
1176 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
1177 | } | |
1178 | ||
ac155bb8 MS |
1179 | if (u->fragment_path) |
1180 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 1181 | |
1b64d026 LP |
1182 | if (u->source_path) |
1183 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
1184 | ||
ae7a7182 | 1185 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 1186 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 1187 | |
e7dfbb4e LP |
1188 | if (u->failure_action != EMERGENCY_ACTION_NONE) |
1189 | fprintf(f, "%s\tFailure Action: %s\n", prefix, emergency_action_to_string(u->failure_action)); | |
1190 | if (u->success_action != EMERGENCY_ACTION_NONE) | |
1191 | fprintf(f, "%s\tSuccess Action: %s\n", prefix, emergency_action_to_string(u->success_action)); | |
1192 | ||
36c16a7c | 1193 | if (u->job_timeout != USEC_INFINITY) |
2fa4092c | 1194 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 1195 | |
87a47f99 LN |
1196 | if (u->job_timeout_action != EMERGENCY_ACTION_NONE) |
1197 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, emergency_action_to_string(u->job_timeout_action)); | |
f189ab18 LP |
1198 | |
1199 | if (u->job_timeout_reboot_arg) | |
1200 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
1201 | ||
59fccdc5 LP |
1202 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
1203 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 1204 | |
ac155bb8 | 1205 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
1206 | fprintf(f, |
1207 | "%s\tCondition Timestamp: %s\n" | |
1208 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
1209 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
1210 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 1211 | |
59fccdc5 LP |
1212 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
1213 | fprintf(f, | |
1214 | "%s\tAssert Timestamp: %s\n" | |
1215 | "%s\tAssert Result: %s\n", | |
1216 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
1217 | prefix, yes_no(u->assert_result)); | |
1218 | ||
87f0e418 | 1219 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
eef85c4a | 1220 | UnitDependencyInfo di; |
87f0e418 LP |
1221 | Unit *other; |
1222 | ||
eef85c4a LP |
1223 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { |
1224 | bool space = false; | |
1225 | ||
1226 | fprintf(f, "%s\t%s: %s (", prefix, unit_dependency_to_string(d), other->id); | |
1227 | ||
1228 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); | |
1229 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1230 | ||
1231 | fputs(")\n", f); | |
1232 | } | |
87f0e418 LP |
1233 | } |
1234 | ||
eef85c4a LP |
1235 | if (!hashmap_isempty(u->requires_mounts_for)) { |
1236 | UnitDependencyInfo di; | |
1237 | const char *path; | |
1238 | ||
1239 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { | |
1240 | bool space = false; | |
7c8fa05c | 1241 | |
eef85c4a | 1242 | fprintf(f, "%s\tRequiresMountsFor: %s (", prefix, path); |
7c8fa05c | 1243 | |
eef85c4a LP |
1244 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); |
1245 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1246 | ||
1247 | fputs(")\n", f); | |
1248 | } | |
7c8fa05c LP |
1249 | } |
1250 | ||
ac155bb8 | 1251 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 1252 | |
b0650475 | 1253 | fprintf(f, |
a40eb732 | 1254 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
1255 | "%s\tRefuseManualStart: %s\n" |
1256 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 1257 | "%s\tDefaultDependencies: %s\n" |
d420282b | 1258 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1259 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1260 | prefix, yes_no(u->stop_when_unneeded), |
1261 | prefix, yes_no(u->refuse_manual_start), | |
1262 | prefix, yes_no(u->refuse_manual_stop), | |
1263 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1264 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1265 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 1266 | |
23a177ef LP |
1267 | if (UNIT_VTABLE(u)->dump) |
1268 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1269 | |
ac155bb8 | 1270 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1271 | fprintf(f, |
1272 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1273 | prefix, u->merged_into->id); |
1274 | else if (u->load_state == UNIT_ERROR) | |
1275 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 1276 | |
05a98afd LP |
1277 | for (n = sd_bus_track_first(u->bus_track); n; n = sd_bus_track_next(u->bus_track)) |
1278 | fprintf(f, "%s\tBus Ref: %s\n", prefix, n); | |
87f0e418 | 1279 | |
ac155bb8 MS |
1280 | if (u->job) |
1281 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1282 | |
e0209d83 MS |
1283 | if (u->nop_job) |
1284 | job_dump(u->nop_job, f, prefix2); | |
87f0e418 LP |
1285 | } |
1286 | ||
1287 | /* Common implementation for multiple backends */ | |
e537352b | 1288 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1289 | int r; |
1290 | ||
1291 | assert(u); | |
23a177ef | 1292 | |
e48614c4 | 1293 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1294 | r = unit_load_fragment(u); |
1295 | if (r < 0) | |
23a177ef LP |
1296 | return r; |
1297 | ||
ac155bb8 | 1298 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1299 | return -ENOENT; |
1300 | ||
9e4ea9cc ZJS |
1301 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1302 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1303 | * been loaded and which not, at least without doing complicated book-keeping, | |
1304 | * so let's always reread all drop-ins. */ | |
1305 | return unit_load_dropin(unit_follow_merge(u)); | |
23a177ef LP |
1306 | } |
1307 | ||
1308 | /* Common implementation for multiple backends */ | |
e537352b | 1309 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1310 | int r; |
87f0e418 LP |
1311 | |
1312 | assert(u); | |
1313 | ||
23a177ef LP |
1314 | /* Same as unit_load_fragment_and_dropin(), but whether |
1315 | * something can be loaded or not doesn't matter. */ | |
1316 | ||
1317 | /* Load a .service file */ | |
4ad49000 LP |
1318 | r = unit_load_fragment(u); |
1319 | if (r < 0) | |
87f0e418 LP |
1320 | return r; |
1321 | ||
ac155bb8 MS |
1322 | if (u->load_state == UNIT_STUB) |
1323 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1324 | |
9e4ea9cc ZJS |
1325 | /* Load drop-in directory data */ |
1326 | return unit_load_dropin(unit_follow_merge(u)); | |
87f0e418 LP |
1327 | } |
1328 | ||
19496554 MS |
1329 | void unit_add_to_target_deps_queue(Unit *u) { |
1330 | Manager *m = u->manager; | |
1331 | ||
1332 | assert(u); | |
1333 | ||
1334 | if (u->in_target_deps_queue) | |
1335 | return; | |
1336 | ||
1337 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1338 | u->in_target_deps_queue = true; | |
1339 | } | |
1340 | ||
bba34eed | 1341 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1342 | assert(u); |
1343 | assert(target); | |
1344 | ||
ac155bb8 | 1345 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1346 | return 0; |
1347 | ||
35b8ca3a | 1348 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1349 | * that loop check below is reliable */ |
ac155bb8 MS |
1350 | if (u->load_state != UNIT_LOADED || |
1351 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1352 | return 0; |
1353 | ||
21256a2b LP |
1354 | /* If either side wants no automatic dependencies, then let's |
1355 | * skip this */ | |
ac155bb8 MS |
1356 | if (!u->default_dependencies || |
1357 | !target->default_dependencies) | |
21256a2b LP |
1358 | return 0; |
1359 | ||
98bc2000 | 1360 | /* Don't create loops */ |
eef85c4a | 1361 | if (hashmap_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1362 | return 0; |
1363 | ||
eef85c4a | 1364 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1365 | } |
1366 | ||
e954c9cf | 1367 | static int unit_add_slice_dependencies(Unit *u) { |
eef85c4a | 1368 | UnitDependencyMask mask; |
e954c9cf | 1369 | assert(u); |
b81884e7 | 1370 | |
35b7ff80 | 1371 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1372 | return 0; |
1373 | ||
eef85c4a LP |
1374 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1375 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1376 | relationship). */ | |
1377 | mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; | |
1378 | ||
e954c9cf | 1379 | if (UNIT_ISSET(u->slice)) |
eef85c4a | 1380 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true, mask); |
e954c9cf | 1381 | |
8c8da0e0 | 1382 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1383 | return 0; |
1384 | ||
eef85c4a | 1385 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, NULL, true, mask); |
98bc2000 LP |
1386 | } |
1387 | ||
e954c9cf | 1388 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1389 | UnitDependencyInfo di; |
1390 | const char *path; | |
1391 | Iterator i; | |
9588bc32 LP |
1392 | int r; |
1393 | ||
1394 | assert(u); | |
1395 | ||
eef85c4a LP |
1396 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { |
1397 | char prefix[strlen(path) + 1]; | |
9588bc32 | 1398 | |
eef85c4a | 1399 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1400 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1401 | Unit *m; |
1402 | ||
c7c89abb | 1403 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1404 | if (r < 0) |
1405 | return r; | |
c7c89abb FB |
1406 | |
1407 | m = manager_get_unit(u->manager, p); | |
1408 | if (!m) { | |
1409 | /* Make sure to load the mount unit if | |
1410 | * it exists. If so the dependencies | |
1411 | * on this unit will be added later | |
1412 | * during the loading of the mount | |
1413 | * unit. */ | |
1414 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1415 | continue; |
c7c89abb | 1416 | } |
9588bc32 LP |
1417 | if (m == u) |
1418 | continue; | |
1419 | ||
1420 | if (m->load_state != UNIT_LOADED) | |
1421 | continue; | |
1422 | ||
eef85c4a | 1423 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1424 | if (r < 0) |
1425 | return r; | |
1426 | ||
1427 | if (m->fragment_path) { | |
eef85c4a | 1428 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1429 | if (r < 0) |
1430 | return r; | |
1431 | } | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | return 0; | |
1436 | } | |
1437 | ||
95ae05c0 WC |
1438 | static int unit_add_startup_units(Unit *u) { |
1439 | CGroupContext *c; | |
5269eb6b | 1440 | int r; |
95ae05c0 WC |
1441 | |
1442 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1443 | if (!c) |
1444 | return 0; | |
1445 | ||
d53d9474 | 1446 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1447 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1448 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1449 | return 0; |
1450 | ||
5269eb6b LP |
1451 | r = set_ensure_allocated(&u->manager->startup_units, NULL); |
1452 | if (r < 0) | |
1453 | return r; | |
1454 | ||
756c09e6 | 1455 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1456 | } |
1457 | ||
87f0e418 LP |
1458 | int unit_load(Unit *u) { |
1459 | int r; | |
1460 | ||
1461 | assert(u); | |
1462 | ||
ac155bb8 | 1463 | if (u->in_load_queue) { |
71fda00f | 1464 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1465 | u->in_load_queue = false; |
87f0e418 LP |
1466 | } |
1467 | ||
ac155bb8 | 1468 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1469 | return -EINVAL; |
1470 | ||
ac155bb8 | 1471 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1472 | return 0; |
1473 | ||
4f4afc88 LP |
1474 | if (u->transient_file) { |
1475 | r = fflush_and_check(u->transient_file); | |
1476 | if (r < 0) | |
1477 | goto fail; | |
1478 | ||
50fb00b7 | 1479 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1480 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1481 | } |
1482 | ||
c2756a68 LP |
1483 | if (UNIT_VTABLE(u)->load) { |
1484 | r = UNIT_VTABLE(u)->load(u); | |
1485 | if (r < 0) | |
87f0e418 | 1486 | goto fail; |
c2756a68 | 1487 | } |
23a177ef | 1488 | |
ac155bb8 | 1489 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1490 | r = -ENOENT; |
1491 | goto fail; | |
1492 | } | |
1493 | ||
7c8fa05c | 1494 | if (u->load_state == UNIT_LOADED) { |
19496554 | 1495 | unit_add_to_target_deps_queue(u); |
e954c9cf LP |
1496 | |
1497 | r = unit_add_slice_dependencies(u); | |
1498 | if (r < 0) | |
1499 | goto fail; | |
c2756a68 | 1500 | |
e954c9cf | 1501 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1502 | if (r < 0) |
c2756a68 | 1503 | goto fail; |
7c8fa05c | 1504 | |
95ae05c0 WC |
1505 | r = unit_add_startup_units(u); |
1506 | if (r < 0) | |
1507 | goto fail; | |
1508 | ||
eef85c4a | 1509 | if (u->on_failure_job_mode == JOB_ISOLATE && hashmap_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1510 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
c2756a68 LP |
1511 | r = -EINVAL; |
1512 | goto fail; | |
1513 | } | |
bc432dc7 | 1514 | |
a2df3ea4 MK |
1515 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1516 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1517 | ||
bc432dc7 | 1518 | unit_update_cgroup_members_masks(u); |
f68319bb LP |
1519 | } |
1520 | ||
ac155bb8 | 1521 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1522 | |
1523 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1524 | unit_add_to_gc_queue(u); |
87f0e418 | 1525 | |
87f0e418 LP |
1526 | return 0; |
1527 | ||
1528 | fail: | |
c2756a68 | 1529 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1530 | u->load_error = r; |
c1e1601e | 1531 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1532 | unit_add_to_gc_queue(u); |
23a177ef | 1533 | |
f2341e0a | 1534 | log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
23a177ef | 1535 | |
87f0e418 LP |
1536 | return r; |
1537 | } | |
1538 | ||
49365733 LP |
1539 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1540 | Condition *c; | |
1541 | int triggered = -1; | |
1542 | ||
1543 | assert(u); | |
1544 | assert(to_string); | |
1545 | ||
1546 | /* If the condition list is empty, then it is true */ | |
1547 | if (!first) | |
1548 | return true; | |
1549 | ||
1550 | /* Otherwise, if all of the non-trigger conditions apply and | |
1551 | * if any of the trigger conditions apply (unless there are | |
1552 | * none) we return true */ | |
1553 | LIST_FOREACH(conditions, c, first) { | |
1554 | int r; | |
1555 | ||
1556 | r = condition_test(c); | |
1557 | if (r < 0) | |
f2341e0a LP |
1558 | log_unit_warning(u, |
1559 | "Couldn't determine result for %s=%s%s%s, assuming failed: %m", | |
49365733 LP |
1560 | to_string(c->type), |
1561 | c->trigger ? "|" : "", | |
1562 | c->negate ? "!" : "", | |
f2341e0a | 1563 | c->parameter); |
49365733 | 1564 | else |
f2341e0a LP |
1565 | log_unit_debug(u, |
1566 | "%s=%s%s%s %s.", | |
49365733 LP |
1567 | to_string(c->type), |
1568 | c->trigger ? "|" : "", | |
1569 | c->negate ? "!" : "", | |
1570 | c->parameter, | |
f2341e0a | 1571 | condition_result_to_string(c->result)); |
49365733 LP |
1572 | |
1573 | if (!c->trigger && r <= 0) | |
1574 | return false; | |
1575 | ||
1576 | if (c->trigger && triggered <= 0) | |
1577 | triggered = r > 0; | |
1578 | } | |
1579 | ||
1580 | return triggered != 0; | |
1581 | } | |
1582 | ||
9588bc32 | 1583 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1584 | assert(u); |
1585 | ||
ac155bb8 | 1586 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1587 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1588 | |
ac155bb8 | 1589 | return u->condition_result; |
90bbc946 LP |
1590 | } |
1591 | ||
59fccdc5 LP |
1592 | static bool unit_assert_test(Unit *u) { |
1593 | assert(u); | |
1594 | ||
1595 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1596 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1597 | |
1598 | return u->assert_result; | |
1599 | } | |
1600 | ||
df446f96 LP |
1601 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
1602 | DISABLE_WARNING_FORMAT_NONLITERAL; | |
1603 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, status, unit_status_msg_format, unit_description(u)); | |
1604 | REENABLE_WARNING; | |
1605 | } | |
1606 | ||
44a6b1b6 | 1607 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
877d54e9 | 1608 | const char *format; |
a85ca902 | 1609 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1610 | |
1611 | assert(u); | |
df446f96 | 1612 | assert(IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)); |
877d54e9 | 1613 | |
b5bf308b | 1614 | if (t != JOB_RELOAD) { |
a85ca902 MS |
1615 | format_table = &UNIT_VTABLE(u)->status_message_formats; |
1616 | if (format_table) { | |
1617 | format = format_table->starting_stopping[t == JOB_STOP]; | |
1618 | if (format) | |
1619 | return format; | |
1620 | } | |
1621 | } | |
877d54e9 LP |
1622 | |
1623 | /* Return generic strings */ | |
1624 | if (t == JOB_START) | |
1625 | return "Starting %s."; | |
1626 | else if (t == JOB_STOP) | |
1627 | return "Stopping %s."; | |
b5bf308b | 1628 | else |
877d54e9 | 1629 | return "Reloading %s."; |
877d54e9 LP |
1630 | } |
1631 | ||
1632 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1633 | const char *format; | |
1634 | ||
1635 | assert(u); | |
1636 | ||
df446f96 LP |
1637 | /* Reload status messages have traditionally not been printed to console. */ |
1638 | if (!IN_SET(t, JOB_START, JOB_STOP)) | |
1639 | return; | |
1640 | ||
877d54e9 | 1641 | format = unit_get_status_message_format(u, t); |
c6918296 | 1642 | |
bcfce235 | 1643 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1644 | unit_status_printf(u, "", format); |
bcfce235 | 1645 | REENABLE_WARNING; |
c6918296 MS |
1646 | } |
1647 | ||
877d54e9 | 1648 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
2b044526 | 1649 | const char *format, *mid; |
877d54e9 | 1650 | char buf[LINE_MAX]; |
877d54e9 LP |
1651 | |
1652 | assert(u); | |
1653 | ||
df446f96 | 1654 | if (!IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)) |
877d54e9 LP |
1655 | return; |
1656 | ||
81270860 LP |
1657 | if (log_on_console()) |
1658 | return; | |
1659 | ||
877d54e9 LP |
1660 | /* We log status messages for all units and all operations. */ |
1661 | ||
a85ca902 | 1662 | format = unit_get_status_message_format(u, t); |
877d54e9 | 1663 | |
bcfce235 | 1664 | DISABLE_WARNING_FORMAT_NONLITERAL; |
bea28c5a | 1665 | (void) snprintf(buf, sizeof buf, format, unit_description(u)); |
bcfce235 | 1666 | REENABLE_WARNING; |
877d54e9 | 1667 | |
2b044526 ZJS |
1668 | mid = t == JOB_START ? "MESSAGE_ID=" SD_MESSAGE_UNIT_STARTING_STR : |
1669 | t == JOB_STOP ? "MESSAGE_ID=" SD_MESSAGE_UNIT_STOPPING_STR : | |
1670 | "MESSAGE_ID=" SD_MESSAGE_UNIT_RELOADING_STR; | |
877d54e9 | 1671 | |
f2341e0a LP |
1672 | /* Note that we deliberately use LOG_MESSAGE() instead of |
1673 | * LOG_UNIT_MESSAGE() here, since this is supposed to mimic | |
1674 | * closely what is written to screen using the status output, | |
1675 | * which is supposed the highest level, friendliest output | |
1676 | * possible, which means we should avoid the low-level unit | |
1677 | * name. */ | |
1678 | log_struct(LOG_INFO, | |
f2341e0a | 1679 | LOG_MESSAGE("%s", buf), |
ba360bb0 | 1680 | LOG_UNIT_ID(u), |
f1c50bec | 1681 | LOG_UNIT_INVOCATION_ID(u), |
ba360bb0 | 1682 | mid, |
f2341e0a | 1683 | NULL); |
877d54e9 | 1684 | } |
877d54e9 | 1685 | |
d1a34ae9 | 1686 | void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t) { |
df446f96 LP |
1687 | assert(u); |
1688 | assert(t >= 0); | |
1689 | assert(t < _JOB_TYPE_MAX); | |
d1a34ae9 MS |
1690 | |
1691 | unit_status_log_starting_stopping_reloading(u, t); | |
df446f96 | 1692 | unit_status_print_starting_stopping(u, t); |
d1a34ae9 MS |
1693 | } |
1694 | ||
07299350 | 1695 | int unit_start_limit_test(Unit *u) { |
6bf0f408 LP |
1696 | assert(u); |
1697 | ||
1698 | if (ratelimit_test(&u->start_limit)) { | |
1699 | u->start_limit_hit = false; | |
1700 | return 0; | |
1701 | } | |
1702 | ||
1703 | log_unit_warning(u, "Start request repeated too quickly."); | |
1704 | u->start_limit_hit = true; | |
1705 | ||
87a47f99 | 1706 | return emergency_action(u->manager, u->start_limit_action, u->reboot_arg, "unit failed"); |
6bf0f408 LP |
1707 | } |
1708 | ||
c891efaf | 1709 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1710 | assert(u); |
c891efaf FB |
1711 | |
1712 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1713 | return false; | |
1714 | ||
1715 | /* For some reasons units remaining in the same process group | |
1716 | * as PID 1 fail to acquire the console even if it's not used | |
1717 | * by any process. So skip the confirmation question for them. */ | |
1718 | return !unit_get_exec_context(u)->same_pgrp; | |
1719 | } | |
1720 | ||
631b676b LP |
1721 | static bool unit_verify_deps(Unit *u) { |
1722 | Unit *other; | |
1723 | Iterator j; | |
eef85c4a | 1724 | void *v; |
631b676b LP |
1725 | |
1726 | assert(u); | |
1727 | ||
1728 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with | |
1729 | * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job | |
1730 | * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in | |
1731 | * conjunction with After= as for them any such check would make things entirely racy. */ | |
1732 | ||
eef85c4a | 1733 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], j) { |
631b676b | 1734 | |
eef85c4a | 1735 | if (!hashmap_contains(u->dependencies[UNIT_AFTER], other)) |
631b676b LP |
1736 | continue; |
1737 | ||
1738 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1739 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1740 | return false; | |
1741 | } | |
1742 | } | |
1743 | ||
1744 | return true; | |
1745 | } | |
1746 | ||
87f0e418 | 1747 | /* Errors: |
6bf0f408 LP |
1748 | * -EBADR: This unit type does not support starting. |
1749 | * -EALREADY: Unit is already started. | |
1750 | * -EAGAIN: An operation is already in progress. Retry later. | |
1751 | * -ECANCELED: Too many requests for now. | |
1752 | * -EPROTO: Assert failed | |
1753 | * -EINVAL: Unit not loaded | |
1754 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1755 | * -ENOLINK: The necessary dependencies are not fulfilled. |
87f0e418 LP |
1756 | */ |
1757 | int unit_start(Unit *u) { | |
1758 | UnitActiveState state; | |
92ab323c | 1759 | Unit *following; |
87f0e418 LP |
1760 | |
1761 | assert(u); | |
1762 | ||
a82e5507 LP |
1763 | /* If this is already started, then this will succeed. Note |
1764 | * that this will even succeed if this unit is not startable | |
1765 | * by the user. This is relied on to detect when we need to | |
1766 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1767 | state = unit_active_state(u); |
1768 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1769 | return -EALREADY; | |
1770 | ||
6bf0f408 LP |
1771 | /* Units that aren't loaded cannot be started */ |
1772 | if (u->load_state != UNIT_LOADED) | |
1773 | return -EINVAL; | |
1774 | ||
a82e5507 LP |
1775 | /* If the conditions failed, don't do anything at all. If we |
1776 | * already are activating this call might still be useful to | |
1777 | * speed up activation in case there is some hold-off time, | |
1778 | * but we don't want to recheck the condition in that case. */ | |
1779 | if (state != UNIT_ACTIVATING && | |
1780 | !unit_condition_test(u)) { | |
f2341e0a | 1781 | log_unit_debug(u, "Starting requested but condition failed. Not starting unit."); |
52661efd LP |
1782 | return -EALREADY; |
1783 | } | |
1784 | ||
59fccdc5 LP |
1785 | /* If the asserts failed, fail the entire job */ |
1786 | if (state != UNIT_ACTIVATING && | |
1787 | !unit_assert_test(u)) { | |
f2341e0a | 1788 | log_unit_notice(u, "Starting requested but asserts failed."); |
59fccdc5 LP |
1789 | return -EPROTO; |
1790 | } | |
1791 | ||
d11a7645 LP |
1792 | /* Units of types that aren't supported cannot be |
1793 | * started. Note that we do this test only after the condition | |
1794 | * checks, so that we rather return condition check errors | |
1795 | * (which are usually not considered a true failure) than "not | |
1796 | * supported" errors (which are considered a failure). | |
1797 | */ | |
1798 | if (!unit_supported(u)) | |
1799 | return -EOPNOTSUPP; | |
1800 | ||
631b676b LP |
1801 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine should have |
1802 | * taken care of this already, but let's check this here again. After all, our dependencies might not be in | |
1803 | * effect anymore, due to a reload or due to a failed condition. */ | |
1804 | if (!unit_verify_deps(u)) | |
1805 | return -ENOLINK; | |
1806 | ||
92ab323c | 1807 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1808 | following = unit_following(u); |
1809 | if (following) { | |
f2341e0a | 1810 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1811 | return unit_start(following); |
1812 | } | |
1813 | ||
1814 | /* If it is stopped, but we cannot start it, then fail */ | |
1815 | if (!UNIT_VTABLE(u)->start) | |
1816 | return -EBADR; | |
1817 | ||
87f0e418 LP |
1818 | /* We don't suppress calls to ->start() here when we are |
1819 | * already starting, to allow this request to be used as a | |
1820 | * "hurry up" call, for example when the unit is in some "auto | |
1821 | * restart" state where it waits for a holdoff timer to elapse | |
1822 | * before it will start again. */ | |
1823 | ||
c1e1601e | 1824 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1825 | |
d1a34ae9 | 1826 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1827 | } |
1828 | ||
1829 | bool unit_can_start(Unit *u) { | |
1830 | assert(u); | |
1831 | ||
8ff4d2ab LP |
1832 | if (u->load_state != UNIT_LOADED) |
1833 | return false; | |
1834 | ||
1835 | if (!unit_supported(u)) | |
1836 | return false; | |
1837 | ||
87f0e418 LP |
1838 | return !!UNIT_VTABLE(u)->start; |
1839 | } | |
1840 | ||
2528a7a6 LP |
1841 | bool unit_can_isolate(Unit *u) { |
1842 | assert(u); | |
1843 | ||
1844 | return unit_can_start(u) && | |
ac155bb8 | 1845 | u->allow_isolate; |
2528a7a6 LP |
1846 | } |
1847 | ||
87f0e418 LP |
1848 | /* Errors: |
1849 | * -EBADR: This unit type does not support stopping. | |
1850 | * -EALREADY: Unit is already stopped. | |
1851 | * -EAGAIN: An operation is already in progress. Retry later. | |
1852 | */ | |
1853 | int unit_stop(Unit *u) { | |
1854 | UnitActiveState state; | |
92ab323c | 1855 | Unit *following; |
87f0e418 LP |
1856 | |
1857 | assert(u); | |
1858 | ||
87f0e418 | 1859 | state = unit_active_state(u); |
fdf20a31 | 1860 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1861 | return -EALREADY; |
1862 | ||
0faacd47 LP |
1863 | following = unit_following(u); |
1864 | if (following) { | |
f2341e0a | 1865 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1866 | return unit_stop(following); |
1867 | } | |
1868 | ||
7898b0cf LP |
1869 | if (!UNIT_VTABLE(u)->stop) |
1870 | return -EBADR; | |
1871 | ||
c1e1601e | 1872 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1873 | |
d1a34ae9 | 1874 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1875 | } |
1876 | ||
f5869324 LP |
1877 | bool unit_can_stop(Unit *u) { |
1878 | assert(u); | |
1879 | ||
1880 | if (!unit_supported(u)) | |
1881 | return false; | |
1882 | ||
1883 | if (u->perpetual) | |
1884 | return false; | |
1885 | ||
1886 | return !!UNIT_VTABLE(u)->stop; | |
1887 | } | |
1888 | ||
87f0e418 LP |
1889 | /* Errors: |
1890 | * -EBADR: This unit type does not support reloading. | |
1891 | * -ENOEXEC: Unit is not started. | |
1892 | * -EAGAIN: An operation is already in progress. Retry later. | |
1893 | */ | |
1894 | int unit_reload(Unit *u) { | |
1895 | UnitActiveState state; | |
92ab323c | 1896 | Unit *following; |
87f0e418 LP |
1897 | |
1898 | assert(u); | |
1899 | ||
ac155bb8 | 1900 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1901 | return -EINVAL; |
1902 | ||
87f0e418 LP |
1903 | if (!unit_can_reload(u)) |
1904 | return -EBADR; | |
1905 | ||
1906 | state = unit_active_state(u); | |
e364ad06 | 1907 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1908 | return -EALREADY; |
1909 | ||
6a371e23 | 1910 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1911 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1912 | return -ENOEXEC; |
6a371e23 | 1913 | } |
87f0e418 | 1914 | |
e48614c4 ZJS |
1915 | following = unit_following(u); |
1916 | if (following) { | |
f2341e0a | 1917 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1918 | return unit_reload(following); |
1919 | } | |
1920 | ||
c1e1601e | 1921 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1922 | |
f54bcca5 JR |
1923 | if (!UNIT_VTABLE(u)->reload) { |
1924 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
1925 | unit_notify(u, unit_active_state(u), unit_active_state(u), true); | |
1926 | return 0; | |
1927 | } | |
1928 | ||
d1a34ae9 | 1929 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1930 | } |
1931 | ||
1932 | bool unit_can_reload(Unit *u) { | |
1933 | assert(u); | |
1934 | ||
f54bcca5 JR |
1935 | if (UNIT_VTABLE(u)->can_reload) |
1936 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 1937 | |
eef85c4a | 1938 | if (!hashmap_isempty(u->dependencies[UNIT_PROPAGATES_RELOAD_TO])) |
87f0e418 LP |
1939 | return true; |
1940 | ||
f54bcca5 | 1941 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
1942 | } |
1943 | ||
b4a16b7b | 1944 | static void unit_check_unneeded(Unit *u) { |
be7d9ff7 | 1945 | |
4afd3348 | 1946 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
4bd29fe5 | 1947 | |
be7d9ff7 LP |
1948 | static const UnitDependency needed_dependencies[] = { |
1949 | UNIT_REQUIRED_BY, | |
084918ba | 1950 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1951 | UNIT_WANTED_BY, |
1952 | UNIT_BOUND_BY, | |
1953 | }; | |
1954 | ||
be7d9ff7 LP |
1955 | unsigned j; |
1956 | int r; | |
f3bff0eb LP |
1957 | |
1958 | assert(u); | |
1959 | ||
1960 | /* If this service shall be shut down when unneeded then do | |
1961 | * so. */ | |
1962 | ||
ac155bb8 | 1963 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1964 | return; |
1965 | ||
1966 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1967 | return; | |
1968 | ||
eef85c4a LP |
1969 | for (j = 0; j < ELEMENTSOF(needed_dependencies); j++) { |
1970 | Unit *other; | |
1971 | Iterator i; | |
1972 | void *v; | |
1973 | ||
1974 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[needed_dependencies[j]], i) | |
deb4e708 | 1975 | if (unit_active_or_pending(other) || unit_will_restart(other)) |
be7d9ff7 | 1976 | return; |
eef85c4a | 1977 | } |
b81884e7 | 1978 | |
595bfe7d | 1979 | /* If stopping a unit fails continuously we might enter a stop |
bea355da LP |
1980 | * loop here, hence stop acting on the service being |
1981 | * unnecessary after a while. */ | |
67bfdc97 | 1982 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { |
bea355da LP |
1983 | log_unit_warning(u, "Unit not needed anymore, but not stopping since we tried this too often recently."); |
1984 | return; | |
1985 | } | |
1986 | ||
f2341e0a | 1987 | log_unit_info(u, "Unit not needed anymore. Stopping."); |
f3bff0eb LP |
1988 | |
1989 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
4bd29fe5 | 1990 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
be7d9ff7 | 1991 | if (r < 0) |
4bd29fe5 | 1992 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
f3bff0eb LP |
1993 | } |
1994 | ||
ff502445 | 1995 | static void unit_check_binds_to(Unit *u) { |
4afd3348 | 1996 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
ff502445 LP |
1997 | bool stop = false; |
1998 | Unit *other; | |
1999 | Iterator i; | |
eef85c4a | 2000 | void *v; |
67bfdc97 | 2001 | int r; |
ff502445 LP |
2002 | |
2003 | assert(u); | |
2004 | ||
2005 | if (u->job) | |
2006 | return; | |
2007 | ||
2008 | if (unit_active_state(u) != UNIT_ACTIVE) | |
2009 | return; | |
2010 | ||
eef85c4a | 2011 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) { |
ff502445 LP |
2012 | if (other->job) |
2013 | continue; | |
13ddc3fc ZJS |
2014 | |
2015 | if (!other->coldplugged) | |
2016 | /* We might yet create a job for the other unit… */ | |
2017 | continue; | |
ff502445 LP |
2018 | |
2019 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
2020 | continue; | |
2021 | ||
2022 | stop = true; | |
98f738b6 | 2023 | break; |
ff502445 LP |
2024 | } |
2025 | ||
2026 | if (!stop) | |
2027 | return; | |
2028 | ||
595bfe7d | 2029 | /* If stopping a unit fails continuously we might enter a stop |
67bfdc97 LP |
2030 | * loop here, hence stop acting on the service being |
2031 | * unnecessary after a while. */ | |
2032 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { | |
2033 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); | |
2034 | return; | |
2035 | } | |
2036 | ||
98f738b6 | 2037 | assert(other); |
f2341e0a | 2038 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
2039 | |
2040 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
4bd29fe5 | 2041 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
67bfdc97 | 2042 | if (r < 0) |
4bd29fe5 | 2043 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
ff502445 LP |
2044 | } |
2045 | ||
87f0e418 LP |
2046 | static void retroactively_start_dependencies(Unit *u) { |
2047 | Iterator i; | |
2048 | Unit *other; | |
eef85c4a | 2049 | void *v; |
87f0e418 LP |
2050 | |
2051 | assert(u); | |
2052 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2053 | ||
eef85c4a LP |
2054 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUIRES], i) |
2055 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2056 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2057 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
b81884e7 | 2058 | |
eef85c4a LP |
2059 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) |
2060 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2061 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2062 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
87f0e418 | 2063 | |
eef85c4a LP |
2064 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_WANTS], i) |
2065 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2066 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2067 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL); |
87f0e418 | 2068 | |
eef85c4a | 2069 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 2070 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2071 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
69dd2852 | 2072 | |
eef85c4a | 2073 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 2074 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2075 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
87f0e418 LP |
2076 | } |
2077 | ||
2078 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 | 2079 | Unit *other; |
eef85c4a LP |
2080 | Iterator i; |
2081 | void *v; | |
87f0e418 LP |
2082 | |
2083 | assert(u); | |
2084 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2085 | ||
b81884e7 | 2086 | /* Pull down units which are bound to us recursively if enabled */ |
eef85c4a | 2087 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 2088 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 2089 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
cd0504d0 MS |
2090 | } |
2091 | ||
2092 | static void check_unneeded_dependencies(Unit *u) { | |
cd0504d0 | 2093 | Unit *other; |
eef85c4a LP |
2094 | Iterator i; |
2095 | void *v; | |
cd0504d0 MS |
2096 | |
2097 | assert(u); | |
2098 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
2099 | |
2100 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
eef85c4a | 2101 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 2102 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 2103 | unit_check_unneeded(other); |
eef85c4a | 2104 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 2105 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 2106 | unit_check_unneeded(other); |
eef85c4a | 2107 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 2108 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 2109 | unit_check_unneeded(other); |
eef85c4a | 2110 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
2111 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
2112 | unit_check_unneeded(other); | |
87f0e418 LP |
2113 | } |
2114 | ||
3ecaa09b | 2115 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
2116 | Unit *other; |
2117 | Iterator i; | |
eef85c4a | 2118 | void *v; |
c0daa706 LP |
2119 | |
2120 | assert(u); | |
2121 | ||
eef85c4a | 2122 | if (hashmap_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
2123 | return; |
2124 | ||
f2341e0a | 2125 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 2126 | |
eef85c4a | 2127 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
2128 | int r; |
2129 | ||
4bd29fe5 | 2130 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, NULL, NULL); |
c1b6628d | 2131 | if (r < 0) |
f2341e0a | 2132 | log_unit_error_errno(u, r, "Failed to enqueue OnFailure= job: %m"); |
222ae6a8 | 2133 | } |
c0daa706 LP |
2134 | } |
2135 | ||
3ecaa09b LP |
2136 | void unit_trigger_notify(Unit *u) { |
2137 | Unit *other; | |
2138 | Iterator i; | |
eef85c4a | 2139 | void *v; |
3ecaa09b LP |
2140 | |
2141 | assert(u); | |
2142 | ||
eef85c4a | 2143 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_TRIGGERED_BY], i) |
3ecaa09b LP |
2144 | if (UNIT_VTABLE(other)->trigger_notify) |
2145 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2146 | } | |
2147 | ||
915b1d01 LP |
2148 | static int unit_log_resources(Unit *u) { |
2149 | ||
2150 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + 4]; | |
2151 | size_t n_message_parts = 0, n_iovec = 0; | |
2152 | char* message_parts[3 + 1], *t; | |
2153 | nsec_t nsec = NSEC_INFINITY; | |
2154 | CGroupIPAccountingMetric m; | |
2155 | size_t i; | |
2156 | int r; | |
2157 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2158 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2159 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2160 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2161 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2162 | }; | |
2163 | ||
2164 | assert(u); | |
2165 | ||
2166 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2167 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2168 | * information and the complete data in structured fields. */ | |
2169 | ||
2170 | (void) unit_get_cpu_usage(u, &nsec); | |
2171 | if (nsec != NSEC_INFINITY) { | |
2172 | char buf[FORMAT_TIMESPAN_MAX] = ""; | |
2173 | ||
2174 | /* Format the CPU time for inclusion in the structured log message */ | |
2175 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2176 | r = log_oom(); | |
2177 | goto finish; | |
2178 | } | |
2179 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2180 | ||
2181 | /* Format the CPU time for inclusion in the human language message string */ | |
2182 | format_timespan(buf, sizeof(buf), nsec / NSEC_PER_USEC, USEC_PER_MSEC); | |
2183 | t = strjoin(n_message_parts > 0 ? "consumed " : "Consumed ", buf, " CPU time"); | |
2184 | if (!t) { | |
2185 | r = log_oom(); | |
2186 | goto finish; | |
2187 | } | |
2188 | ||
2189 | message_parts[n_message_parts++] = t; | |
2190 | } | |
2191 | ||
2192 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { | |
2193 | char buf[FORMAT_BYTES_MAX] = ""; | |
2194 | uint64_t value = UINT64_MAX; | |
2195 | ||
2196 | assert(ip_fields[m]); | |
2197 | ||
2198 | (void) unit_get_ip_accounting(u, m, &value); | |
2199 | if (value == UINT64_MAX) | |
2200 | continue; | |
2201 | ||
2202 | /* Format IP accounting data for inclusion in the structured log message */ | |
2203 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2204 | r = log_oom(); | |
2205 | goto finish; | |
2206 | } | |
2207 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2208 | ||
2209 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2210 | * bytes counters (and not for the packets counters) */ | |
2211 | if (m == CGROUP_IP_INGRESS_BYTES) | |
2212 | t = strjoin(n_message_parts > 0 ? "received " : "Received ", | |
2213 | format_bytes(buf, sizeof(buf), value), | |
2214 | " IP traffic"); | |
2215 | else if (m == CGROUP_IP_EGRESS_BYTES) | |
2216 | t = strjoin(n_message_parts > 0 ? "sent " : "Sent ", | |
2217 | format_bytes(buf, sizeof(buf), value), | |
2218 | " IP traffic"); | |
2219 | else | |
2220 | continue; | |
2221 | if (!t) { | |
2222 | r = log_oom(); | |
2223 | goto finish; | |
2224 | } | |
2225 | ||
2226 | message_parts[n_message_parts++] = t; | |
2227 | } | |
2228 | ||
2229 | /* Is there any accounting data available at all? */ | |
2230 | if (n_iovec == 0) { | |
2231 | r = 0; | |
2232 | goto finish; | |
2233 | } | |
2234 | ||
2235 | if (n_message_parts == 0) | |
2236 | t = strjoina("MESSAGE=", u->id, ": Completed"); | |
2237 | else { | |
2238 | _cleanup_free_ char *joined; | |
2239 | ||
2240 | message_parts[n_message_parts] = NULL; | |
2241 | ||
2242 | joined = strv_join(message_parts, ", "); | |
2243 | if (!joined) { | |
2244 | r = log_oom(); | |
2245 | goto finish; | |
2246 | } | |
2247 | ||
2248 | t = strjoina("MESSAGE=", u->id, ": ", joined); | |
2249 | } | |
2250 | ||
2251 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2252 | * and hence don't increase n_iovec for them */ | |
2253 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2254 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2255 | ||
2256 | t = strjoina(u->manager->unit_log_field, u->id); | |
2257 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2258 | ||
2259 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2260 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2261 | ||
2262 | log_struct_iovec(LOG_INFO, iovec, n_iovec + 4); | |
2263 | r = 0; | |
2264 | ||
2265 | finish: | |
2266 | for (i = 0; i < n_message_parts; i++) | |
2267 | free(message_parts[i]); | |
2268 | ||
2269 | for (i = 0; i < n_iovec; i++) | |
2270 | free(iovec[i].iov_base); | |
2271 | ||
2272 | return r; | |
2273 | ||
2274 | } | |
2275 | ||
adefcf28 LP |
2276 | static void unit_update_on_console(Unit *u) { |
2277 | bool b; | |
2278 | ||
2279 | assert(u); | |
2280 | ||
2281 | b = unit_needs_console(u); | |
2282 | if (u->on_console == b) | |
2283 | return; | |
2284 | ||
2285 | u->on_console = b; | |
2286 | if (b) | |
2287 | manager_ref_console(u->manager); | |
2288 | else | |
2289 | manager_unref_console(u->manager); | |
2290 | ||
2291 | } | |
2292 | ||
e2f3b44c | 2293 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
7e6e7b06 | 2294 | bool unexpected; |
8559b3b7 | 2295 | Manager *m; |
a096ed36 | 2296 | |
87f0e418 LP |
2297 | assert(u); |
2298 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2299 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2300 | |
8559b3b7 LP |
2301 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2302 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2303 | * remounted this function will be called too! */ | |
87f0e418 | 2304 | |
546ac4f0 MS |
2305 | m = u->manager; |
2306 | ||
f755e3b7 | 2307 | /* Update timestamps for state changes */ |
2c289ea8 | 2308 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2309 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2310 | |
bdbf9951 | 2311 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2312 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2313 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2314 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2315 | |
2316 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2317 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2318 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2319 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2320 | } |
87f0e418 | 2321 | |
865cc19a | 2322 | /* Keep track of failed units */ |
5269eb6b | 2323 | (void) manager_update_failed_units(u->manager, u, ns == UNIT_FAILED); |
f755e3b7 | 2324 | |
d3070fbd LP |
2325 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2326 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
efdb0237 | 2327 | unit_prune_cgroup(u); |
d3070fbd LP |
2328 | unit_unlink_state_files(u); |
2329 | } | |
fb385181 | 2330 | |
adefcf28 | 2331 | unit_update_on_console(u); |
7ed9f6cd | 2332 | |
ac155bb8 | 2333 | if (u->job) { |
7e6e7b06 | 2334 | unexpected = false; |
87f0e418 | 2335 | |
ac155bb8 | 2336 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
2337 | |
2338 | /* So we reached a different state for this | |
2339 | * job. Let's see if we can run it now if it | |
2340 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 2341 | job_add_to_run_queue(u->job); |
87f0e418 | 2342 | |
b410e6b9 | 2343 | /* Let's check whether this state change constitutes a |
35b8ca3a | 2344 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 2345 | * hence needs to invalidate jobs. */ |
87f0e418 | 2346 | |
ac155bb8 | 2347 | switch (u->job->type) { |
87f0e418 | 2348 | |
b410e6b9 LP |
2349 | case JOB_START: |
2350 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 2351 | |
b410e6b9 | 2352 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
833f92ad | 2353 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 2354 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 2355 | unexpected = true; |
41b02ec7 | 2356 | |
fdf20a31 | 2357 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2358 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
b410e6b9 | 2359 | } |
87f0e418 | 2360 | |
b410e6b9 | 2361 | break; |
87f0e418 | 2362 | |
b410e6b9 LP |
2363 | case JOB_RELOAD: |
2364 | case JOB_RELOAD_OR_START: | |
3282591d | 2365 | case JOB_TRY_RELOAD: |
87f0e418 | 2366 | |
ac155bb8 | 2367 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 2368 | if (ns == UNIT_ACTIVE) |
833f92ad | 2369 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true, false); |
ec2ce0c5 | 2370 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { |
a096ed36 | 2371 | unexpected = true; |
41b02ec7 | 2372 | |
fdf20a31 | 2373 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2374 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
a096ed36 | 2375 | } |
b410e6b9 | 2376 | } |
87f0e418 | 2377 | |
b410e6b9 | 2378 | break; |
87f0e418 | 2379 | |
b410e6b9 LP |
2380 | case JOB_STOP: |
2381 | case JOB_RESTART: | |
2382 | case JOB_TRY_RESTART: | |
87f0e418 | 2383 | |
fdf20a31 | 2384 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2385 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 2386 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 2387 | unexpected = true; |
833f92ad | 2388 | job_finish_and_invalidate(u->job, JOB_FAILED, true, false); |
b410e6b9 | 2389 | } |
87f0e418 | 2390 | |
b410e6b9 | 2391 | break; |
87f0e418 | 2392 | |
b410e6b9 LP |
2393 | default: |
2394 | assert_not_reached("Job type unknown"); | |
87f0e418 | 2395 | } |
87f0e418 | 2396 | |
7e6e7b06 LP |
2397 | } else |
2398 | unexpected = true; | |
2399 | ||
2c289ea8 | 2400 | if (!MANAGER_IS_RELOADING(m)) { |
f3bff0eb | 2401 | |
bdbf9951 LP |
2402 | /* If this state change happened without being |
2403 | * requested by a job, then let's retroactively start | |
2404 | * or stop dependencies. We skip that step when | |
2405 | * deserializing, since we don't want to create any | |
2406 | * additional jobs just because something is already | |
2407 | * activated. */ | |
2408 | ||
2409 | if (unexpected) { | |
2410 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2411 | retroactively_start_dependencies(u); | |
2412 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2413 | retroactively_stop_dependencies(u); | |
2414 | } | |
5de9682c | 2415 | |
cd0504d0 | 2416 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 2417 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
2418 | check_unneeded_dependencies(u); |
2419 | ||
bdbf9951 | 2420 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2421 | log_unit_debug(u, "Unit entered failed state."); |
3ecaa09b | 2422 | unit_start_on_failure(u); |
cd6d0a45 | 2423 | } |
3b2775c5 | 2424 | } |
e537352b | 2425 | |
3b2775c5 LP |
2426 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { |
2427 | ||
ac155bb8 | 2428 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 2429 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
2c289ea8 | 2430 | !MANAGER_IS_RELOADING(m)) { |
3b2775c5 | 2431 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 2432 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 2433 | u->in_audit = true; |
3b2775c5 | 2434 | } |
e983b760 | 2435 | |
3b2775c5 | 2436 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 2437 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 2438 | |
3b2775c5 | 2439 | } else { |
bdbf9951 | 2440 | |
915b1d01 LP |
2441 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && |
2442 | !UNIT_IS_INACTIVE_OR_FAILED(os) | |
2443 | && !MANAGER_IS_RELOADING(m)) { | |
cd6d0a45 | 2444 | |
915b1d01 LP |
2445 | /* This unit just stopped/failed. */ |
2446 | if (u->type == UNIT_SERVICE) { | |
4927fcae | 2447 | |
915b1d01 LP |
2448 | /* Hmm, if there was no start record written |
2449 | * write it now, so that we always have a nice | |
2450 | * pair */ | |
2451 | if (!u->in_audit) { | |
2452 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); | |
cd6d0a45 | 2453 | |
915b1d01 LP |
2454 | if (ns == UNIT_INACTIVE) |
2455 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); | |
2456 | } else | |
2457 | /* Write audit record if we have just finished shutting down */ | |
2458 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); | |
2459 | ||
2460 | u->in_audit = false; | |
2461 | } | |
bdbf9951 | 2462 | |
915b1d01 LP |
2463 | /* Write a log message about consumed resources */ |
2464 | unit_log_resources(u); | |
cd6d0a45 | 2465 | } |
f278026d LP |
2466 | } |
2467 | ||
31dc1ca3 LP |
2468 | manager_recheck_journal(m); |
2469 | manager_recheck_dbus(m); | |
e63ebf71 | 2470 | |
3ecaa09b | 2471 | unit_trigger_notify(u); |
3b2775c5 | 2472 | |
2c289ea8 | 2473 | if (!MANAGER_IS_RELOADING(u->manager)) { |
8559b3b7 | 2474 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ |
bf6dcfa6 | 2475 | unit_check_unneeded(u); |
c1e1601e | 2476 | |
8559b3b7 LP |
2477 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens when |
2478 | * something BindsTo= to a Type=oneshot unit, as these units go directly from starting to inactive, | |
ff502445 LP |
2479 | * without ever entering started.) */ |
2480 | unit_check_binds_to(u); | |
53c35a76 LP |
2481 | |
2482 | if (os != UNIT_FAILED && ns == UNIT_FAILED) | |
2483 | (void) emergency_action(u->manager, u->failure_action, u->reboot_arg, "unit failed"); | |
e7dfbb4e LP |
2484 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) |
2485 | (void) emergency_action(u->manager, u->success_action, u->reboot_arg, "unit succeeded"); | |
ff502445 LP |
2486 | } |
2487 | ||
c1e1601e | 2488 | unit_add_to_dbus_queue(u); |
701cc384 | 2489 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2490 | } |
2491 | ||
87f0e418 | 2492 | int unit_watch_pid(Unit *u, pid_t pid) { |
62a76913 | 2493 | int r; |
a911bb9a | 2494 | |
87f0e418 | 2495 | assert(u); |
62a76913 | 2496 | assert(pid_is_valid(pid)); |
87f0e418 | 2497 | |
62a76913 | 2498 | /* Watch a specific PID */ |
5ba6985b | 2499 | |
d5099efc | 2500 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2501 | if (r < 0) |
2502 | return r; | |
2503 | ||
62a76913 | 2504 | r = hashmap_ensure_allocated(&u->manager->watch_pids, NULL); |
a911bb9a LP |
2505 | if (r < 0) |
2506 | return r; | |
2507 | ||
62a76913 LP |
2508 | /* First try, let's add the unit keyed by "pid". */ |
2509 | r = hashmap_put(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2510 | if (r == -EEXIST) { | |
2511 | Unit **array; | |
2512 | bool found = false; | |
2513 | size_t n = 0; | |
05e343b7 | 2514 | |
62a76913 LP |
2515 | /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points |
2516 | * to an array of Units rather than just a Unit), lists us already. */ | |
a911bb9a | 2517 | |
62a76913 LP |
2518 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); |
2519 | if (array) | |
2520 | for (; array[n]; n++) | |
2521 | if (array[n] == u) | |
2522 | found = true; | |
a911bb9a | 2523 | |
62a76913 LP |
2524 | if (found) /* Found it already? if so, do nothing */ |
2525 | r = 0; | |
2526 | else { | |
2527 | Unit **new_array; | |
2528 | ||
2529 | /* Allocate a new array */ | |
2530 | new_array = new(Unit*, n + 2); | |
2531 | if (!new_array) | |
2532 | return -ENOMEM; | |
2533 | ||
2534 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2535 | new_array[n] = u; | |
2536 | new_array[n+1] = NULL; | |
2537 | ||
2538 | /* Add or replace the old array */ | |
2539 | r = hashmap_replace(u->manager->watch_pids, PID_TO_PTR(-pid), new_array); | |
2540 | if (r < 0) { | |
2541 | free(new_array); | |
2542 | return r; | |
2543 | } | |
2544 | ||
2545 | free(array); | |
2546 | } | |
2547 | } else if (r < 0) | |
2548 | return r; | |
2549 | ||
2550 | r = set_put(u->pids, PID_TO_PTR(pid)); | |
2551 | if (r < 0) | |
2552 | return r; | |
2553 | ||
2554 | return 0; | |
87f0e418 LP |
2555 | } |
2556 | ||
2557 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
62a76913 LP |
2558 | Unit **array; |
2559 | ||
87f0e418 | 2560 | assert(u); |
62a76913 LP |
2561 | assert(pid_is_valid(pid)); |
2562 | ||
2563 | /* First let's drop the unit in case it's keyed as "pid". */ | |
2564 | (void) hashmap_remove_value(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2565 | ||
2566 | /* Then, let's also drop the unit, in case it's in the array keyed by -pid */ | |
2567 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); | |
2568 | if (array) { | |
2569 | size_t n, m = 0; | |
2570 | ||
2571 | /* Let's iterate through the array, dropping our own entry */ | |
2572 | for (n = 0; array[n]; n++) | |
2573 | if (array[n] != u) | |
2574 | array[m++] = array[n]; | |
2575 | array[m] = NULL; | |
2576 | ||
2577 | if (m == 0) { | |
2578 | /* The array is now empty, remove the entire entry */ | |
2579 | assert(hashmap_remove(u->manager->watch_pids, PID_TO_PTR(-pid)) == array); | |
2580 | free(array); | |
2581 | } | |
2582 | } | |
87f0e418 | 2583 | |
fea72cc0 | 2584 | (void) set_remove(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2585 | } |
2586 | ||
bd44e61b LP |
2587 | void unit_unwatch_all_pids(Unit *u) { |
2588 | assert(u); | |
2589 | ||
2590 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2591 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2592 | |
efdb0237 | 2593 | u->pids = set_free(u->pids); |
a911bb9a LP |
2594 | } |
2595 | ||
2596 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2597 | Iterator i; | |
2598 | void *e; | |
2599 | ||
2600 | assert(u); | |
2601 | ||
2602 | /* Cleans dead PIDs from our list */ | |
2603 | ||
2604 | SET_FOREACH(e, u->pids, i) { | |
fea72cc0 | 2605 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2606 | |
2607 | if (pid == except1 || pid == except2) | |
2608 | continue; | |
2609 | ||
9f5650ae | 2610 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2611 | unit_unwatch_pid(u, pid); |
a911bb9a | 2612 | } |
87f0e418 LP |
2613 | } |
2614 | ||
87f0e418 LP |
2615 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2616 | assert(u); | |
2617 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2618 | ||
2619 | switch (j) { | |
2620 | ||
2621 | case JOB_VERIFY_ACTIVE: | |
2622 | case JOB_START: | |
e0209d83 | 2623 | case JOB_NOP: |
f5869324 LP |
2624 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
2625 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueing | |
2626 | * jobs for it. */ | |
87f0e418 LP |
2627 | return true; |
2628 | ||
f5869324 LP |
2629 | case JOB_STOP: |
2630 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
2631 | * external events), hence it makes no sense to permit enqueing such a request either. */ | |
2632 | return !u->perpetual; | |
2633 | ||
87f0e418 LP |
2634 | case JOB_RESTART: |
2635 | case JOB_TRY_RESTART: | |
f5869324 | 2636 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
2637 | |
2638 | case JOB_RELOAD: | |
3282591d | 2639 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2640 | return unit_can_reload(u); |
2641 | ||
2642 | case JOB_RELOAD_OR_START: | |
2643 | return unit_can_reload(u) && unit_can_start(u); | |
2644 | ||
2645 | default: | |
2646 | assert_not_reached("Invalid job type"); | |
2647 | } | |
2648 | } | |
2649 | ||
f2341e0a LP |
2650 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2651 | assert(u); | |
d1fab3fe | 2652 | |
f2341e0a LP |
2653 | /* Only warn about some unit types */ |
2654 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2655 | return; | |
3f3cc397 | 2656 | |
f2341e0a LP |
2657 | if (streq_ptr(u->id, other)) |
2658 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2659 | else | |
2660 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2661 | } |
2662 | ||
eef85c4a LP |
2663 | static int unit_add_dependency_hashmap( |
2664 | Hashmap **h, | |
2665 | Unit *other, | |
2666 | UnitDependencyMask origin_mask, | |
2667 | UnitDependencyMask destination_mask) { | |
2668 | ||
2669 | UnitDependencyInfo info; | |
2670 | int r; | |
2671 | ||
2672 | assert(h); | |
2673 | assert(other); | |
2674 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2675 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2676 | assert(origin_mask > 0 || destination_mask > 0); | |
2677 | ||
2678 | r = hashmap_ensure_allocated(h, NULL); | |
2679 | if (r < 0) | |
2680 | return r; | |
2681 | ||
2682 | assert_cc(sizeof(void*) == sizeof(info)); | |
2683 | ||
2684 | info.data = hashmap_get(*h, other); | |
2685 | if (info.data) { | |
2686 | /* Entry already exists. Add in our mask. */ | |
2687 | ||
2688 | if ((info.origin_mask & origin_mask) == info.origin_mask && | |
2689 | (info.destination_mask & destination_mask) == info.destination_mask) | |
2690 | return 0; /* NOP */ | |
2691 | ||
2692 | info.origin_mask |= origin_mask; | |
2693 | info.destination_mask |= destination_mask; | |
2694 | ||
2695 | r = hashmap_update(*h, other, info.data); | |
2696 | } else { | |
2697 | info = (UnitDependencyInfo) { | |
2698 | .origin_mask = origin_mask, | |
2699 | .destination_mask = destination_mask, | |
2700 | }; | |
2701 | ||
2702 | r = hashmap_put(*h, other, info.data); | |
2703 | } | |
2704 | if (r < 0) | |
2705 | return r; | |
2706 | ||
2707 | return 1; | |
2708 | } | |
2709 | ||
2710 | int unit_add_dependency( | |
2711 | Unit *u, | |
2712 | UnitDependency d, | |
2713 | Unit *other, | |
2714 | bool add_reference, | |
2715 | UnitDependencyMask mask) { | |
87f0e418 LP |
2716 | |
2717 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2718 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 2719 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 2720 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 2721 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2722 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 2723 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 2724 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 2725 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 2726 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2727 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2728 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2729 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2730 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2731 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2732 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2733 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2734 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2735 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2736 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2737 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2738 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2739 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2740 | }; |
eef85c4a LP |
2741 | Unit *original_u = u, *original_other = other; |
2742 | int r; | |
87f0e418 LP |
2743 | |
2744 | assert(u); | |
2745 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2746 | assert(other); |
2747 | ||
9f151f29 LP |
2748 | u = unit_follow_merge(u); |
2749 | other = unit_follow_merge(other); | |
2750 | ||
87f0e418 LP |
2751 | /* We won't allow dependencies on ourselves. We will not |
2752 | * consider them an error however. */ | |
d1fab3fe | 2753 | if (u == other) { |
eef85c4a | 2754 | maybe_warn_about_dependency(original_u, original_other->id, d); |
87f0e418 | 2755 | return 0; |
d1fab3fe | 2756 | } |
87f0e418 | 2757 | |
eef85c4a LP |
2758 | if ((d == UNIT_BEFORE && other->type == UNIT_DEVICE) || |
2759 | (d == UNIT_AFTER && u->type == UNIT_DEVICE)) { | |
dd5e7000 ZJS |
2760 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
2761 | return 0; | |
2762 | } | |
2763 | ||
eef85c4a | 2764 | r = unit_add_dependency_hashmap(u->dependencies + d, other, mask, 0); |
613b411c | 2765 | if (r < 0) |
87f0e418 LP |
2766 | return r; |
2767 | ||
eef85c4a LP |
2768 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2769 | r = unit_add_dependency_hashmap(other->dependencies + inverse_table[d], u, 0, mask); | |
613b411c LP |
2770 | if (r < 0) |
2771 | return r; | |
2772 | } | |
2773 | ||
2774 | if (add_reference) { | |
eef85c4a | 2775 | r = unit_add_dependency_hashmap(u->dependencies + UNIT_REFERENCES, other, mask, 0); |
613b411c | 2776 | if (r < 0) |
5de9682c LP |
2777 | return r; |
2778 | ||
eef85c4a | 2779 | r = unit_add_dependency_hashmap(other->dependencies + UNIT_REFERENCED_BY, u, 0, mask); |
613b411c | 2780 | if (r < 0) |
701cc384 | 2781 | return r; |
613b411c | 2782 | } |
87f0e418 | 2783 | |
c1e1601e | 2784 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
2785 | return 0; |
2786 | } | |
0301abf4 | 2787 | |
eef85c4a | 2788 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
2c966c03 LP |
2789 | int r; |
2790 | ||
2791 | assert(u); | |
2792 | ||
eef85c4a | 2793 | r = unit_add_dependency(u, d, other, add_reference, mask); |
3f3cc397 | 2794 | if (r < 0) |
2c966c03 LP |
2795 | return r; |
2796 | ||
eef85c4a | 2797 | return unit_add_dependency(u, e, other, add_reference, mask); |
2c966c03 LP |
2798 | } |
2799 | ||
7410616c LP |
2800 | static int resolve_template(Unit *u, const char *name, const char*path, char **buf, const char **ret) { |
2801 | int r; | |
9e2f7c11 LP |
2802 | |
2803 | assert(u); | |
2804 | assert(name || path); | |
7410616c LP |
2805 | assert(buf); |
2806 | assert(ret); | |
9e2f7c11 LP |
2807 | |
2808 | if (!name) | |
2b6bf07d | 2809 | name = basename(path); |
9e2f7c11 | 2810 | |
7410616c LP |
2811 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2812 | *buf = NULL; | |
2813 | *ret = name; | |
2814 | return 0; | |
9e2f7c11 LP |
2815 | } |
2816 | ||
ac155bb8 | 2817 | if (u->instance) |
7410616c | 2818 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 2819 | else { |
ae018d9b | 2820 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2821 | |
7410616c LP |
2822 | r = unit_name_to_prefix(u->id, &i); |
2823 | if (r < 0) | |
2824 | return r; | |
9e2f7c11 | 2825 | |
7410616c | 2826 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 2827 | } |
7410616c LP |
2828 | if (r < 0) |
2829 | return r; | |
9e2f7c11 | 2830 | |
7410616c LP |
2831 | *ret = *buf; |
2832 | return 0; | |
9e2f7c11 LP |
2833 | } |
2834 | ||
eef85c4a | 2835 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference, UnitDependencyMask mask) { |
7410616c | 2836 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
2837 | Unit *other; |
2838 | int r; | |
2839 | ||
9e2f7c11 LP |
2840 | assert(u); |
2841 | assert(name || path); | |
09b6b09f | 2842 | |
7410616c LP |
2843 | r = resolve_template(u, name, path, &buf, &name); |
2844 | if (r < 0) | |
2845 | return r; | |
09b6b09f | 2846 | |
8afbb8e1 LP |
2847 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2848 | if (r < 0) | |
2849 | return r; | |
9e2f7c11 | 2850 | |
eef85c4a | 2851 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
2852 | } |
2853 | ||
eef85c4a | 2854 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference, UnitDependencyMask mask) { |
7410616c | 2855 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2856 | Unit *other; |
2857 | int r; | |
2c966c03 LP |
2858 | |
2859 | assert(u); | |
2860 | assert(name || path); | |
2861 | ||
7410616c LP |
2862 | r = resolve_template(u, name, path, &buf, &name); |
2863 | if (r < 0) | |
2864 | return r; | |
2c966c03 | 2865 | |
3f3cc397 LP |
2866 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2867 | if (r < 0) | |
68eda4bd | 2868 | return r; |
2c966c03 | 2869 | |
eef85c4a | 2870 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
2871 | } |
2872 | ||
0301abf4 | 2873 | int set_unit_path(const char *p) { |
0301abf4 | 2874 | /* This is mostly for debug purposes */ |
cbe46ead | 2875 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 2876 | return -errno; |
0301abf4 LP |
2877 | |
2878 | return 0; | |
2879 | } | |
88066b3a | 2880 | |
ea430986 | 2881 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2882 | assert(u); |
2883 | ||
ac155bb8 | 2884 | if (!u->id) |
04ade7d2 LP |
2885 | return NULL; |
2886 | ||
48899192 | 2887 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2888 | } |
2889 | ||
4b58153d LP |
2890 | char *unit_dbus_path_invocation_id(Unit *u) { |
2891 | assert(u); | |
2892 | ||
2893 | if (sd_id128_is_null(u->invocation_id)) | |
2894 | return NULL; | |
2895 | ||
2896 | return unit_dbus_path_from_name(u->invocation_id_string); | |
2897 | } | |
2898 | ||
d79200e2 LP |
2899 | int unit_set_slice(Unit *u, Unit *slice) { |
2900 | assert(u); | |
2901 | assert(slice); | |
2902 | ||
2903 | /* Sets the unit slice if it has not been set before. Is extra | |
2904 | * careful, to only allow this for units that actually have a | |
2905 | * cgroup context. Also, we don't allow to set this for slices | |
2906 | * (since the parent slice is derived from the name). Make | |
2907 | * sure the unit we set is actually a slice. */ | |
2908 | ||
2909 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
2910 | return -EOPNOTSUPP; | |
2911 | ||
2912 | if (u->type == UNIT_SLICE) | |
2913 | return -EINVAL; | |
2914 | ||
102ef982 LP |
2915 | if (unit_active_state(u) != UNIT_INACTIVE) |
2916 | return -EBUSY; | |
2917 | ||
d79200e2 LP |
2918 | if (slice->type != UNIT_SLICE) |
2919 | return -EINVAL; | |
2920 | ||
efdb0237 LP |
2921 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
2922 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
2923 | return -EPERM; | |
2924 | ||
d79200e2 LP |
2925 | if (UNIT_DEREF(u->slice) == slice) |
2926 | return 0; | |
2927 | ||
99e66921 TH |
2928 | /* Disallow slice changes if @u is already bound to cgroups */ |
2929 | if (UNIT_ISSET(u->slice) && u->cgroup_realized) | |
d79200e2 LP |
2930 | return -EBUSY; |
2931 | ||
7f7d01ed | 2932 | unit_ref_set(&u->slice, u, slice); |
d79200e2 LP |
2933 | return 1; |
2934 | } | |
2935 | ||
2936 | int unit_set_default_slice(Unit *u) { | |
a8833944 LP |
2937 | _cleanup_free_ char *b = NULL; |
2938 | const char *slice_name; | |
a016b922 LP |
2939 | Unit *slice; |
2940 | int r; | |
2941 | ||
2942 | assert(u); | |
2943 | ||
9444b1f2 | 2944 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2945 | return 0; |
2946 | ||
a8833944 LP |
2947 | if (u->instance) { |
2948 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2949 | |
a8833944 LP |
2950 | /* Implicitly place all instantiated units in their |
2951 | * own per-template slice */ | |
2952 | ||
7410616c LP |
2953 | r = unit_name_to_prefix(u->id, &prefix); |
2954 | if (r < 0) | |
2955 | return r; | |
a8833944 LP |
2956 | |
2957 | /* The prefix is already escaped, but it might include | |
2958 | * "-" which has a special meaning for slice units, | |
2959 | * hence escape it here extra. */ | |
7410616c | 2960 | escaped = unit_name_escape(prefix); |
a8833944 LP |
2961 | if (!escaped) |
2962 | return -ENOMEM; | |
2963 | ||
463d0d15 | 2964 | if (MANAGER_IS_SYSTEM(u->manager)) |
605405c6 | 2965 | b = strjoin("system-", escaped, ".slice"); |
a8833944 LP |
2966 | else |
2967 | b = strappend(escaped, ".slice"); | |
2968 | if (!b) | |
2969 | return -ENOMEM; | |
2970 | ||
2971 | slice_name = b; | |
2972 | } else | |
2973 | slice_name = | |
463d0d15 | 2974 | MANAGER_IS_SYSTEM(u->manager) && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
2975 | ? SPECIAL_SYSTEM_SLICE |
2976 | : SPECIAL_ROOT_SLICE; | |
2977 | ||
2978 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2979 | if (r < 0) |
2980 | return r; | |
2981 | ||
d79200e2 | 2982 | return unit_set_slice(u, slice); |
a016b922 LP |
2983 | } |
2984 | ||
9444b1f2 LP |
2985 | const char *unit_slice_name(Unit *u) { |
2986 | assert(u); | |
2987 | ||
2988 | if (!UNIT_ISSET(u->slice)) | |
2989 | return NULL; | |
2990 | ||
2991 | return UNIT_DEREF(u->slice)->id; | |
2992 | } | |
2993 | ||
f6ff8c29 | 2994 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2995 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2996 | int r; |
2997 | ||
2998 | assert(u); | |
2999 | assert(type); | |
3000 | assert(_found); | |
3001 | ||
7410616c LP |
3002 | r = unit_name_change_suffix(u->id, type, &t); |
3003 | if (r < 0) | |
3004 | return r; | |
3005 | if (unit_has_name(u, t)) | |
3006 | return -EINVAL; | |
f6ff8c29 | 3007 | |
ac155bb8 | 3008 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3009 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3010 | return r; |
3011 | } | |
3012 | ||
bbc29086 DM |
3013 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
3014 | const char *name, *old_owner, *new_owner; | |
3015 | Unit *u = userdata; | |
3016 | int r; | |
3017 | ||
3018 | assert(message); | |
3019 | assert(u); | |
3020 | ||
3021 | r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner); | |
3022 | if (r < 0) { | |
3023 | bus_log_parse_error(r); | |
3024 | return 0; | |
3025 | } | |
3026 | ||
a8ea93a5 LP |
3027 | old_owner = empty_to_null(old_owner); |
3028 | new_owner = empty_to_null(new_owner); | |
b0076268 | 3029 | |
bbc29086 DM |
3030 | if (UNIT_VTABLE(u)->bus_name_owner_change) |
3031 | UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); | |
3032 | ||
3033 | return 0; | |
3034 | } | |
3035 | ||
9806e87d LP |
3036 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3037 | const char *match; | |
bbc29086 | 3038 | |
9806e87d LP |
3039 | assert(u); |
3040 | assert(bus); | |
3041 | assert(name); | |
bbc29086 DM |
3042 | |
3043 | if (u->match_bus_slot) | |
3044 | return -EBUSY; | |
3045 | ||
9806e87d | 3046 | match = strjoina("type='signal'," |
81d62103 ZJS |
3047 | "sender='org.freedesktop.DBus'," |
3048 | "path='/org/freedesktop/DBus'," | |
3049 | "interface='org.freedesktop.DBus'," | |
3050 | "member='NameOwnerChanged'," | |
3051 | "arg0='", name, "'"); | |
bbc29086 | 3052 | |
75152a4d | 3053 | return sd_bus_add_match_async(bus, &u->match_bus_slot, match, signal_name_owner_changed, NULL, u); |
bbc29086 DM |
3054 | } |
3055 | ||
05e343b7 | 3056 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3057 | int r; |
3058 | ||
05e343b7 LP |
3059 | assert(u); |
3060 | assert(name); | |
3061 | ||
3062 | /* Watch a specific name on the bus. We only support one unit | |
3063 | * watching each name for now. */ | |
3064 | ||
bbc29086 DM |
3065 | if (u->manager->api_bus) { |
3066 | /* If the bus is already available, install the match directly. | |
3067 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3068 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3069 | if (r < 0) |
8ea823b6 | 3070 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3071 | } |
3072 | ||
3073 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3074 | if (r < 0) { | |
3075 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3076 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); | |
3077 | } | |
3078 | ||
3079 | return 0; | |
05e343b7 LP |
3080 | } |
3081 | ||
3082 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3083 | assert(u); | |
3084 | assert(name); | |
3085 | ||
8367fea5 | 3086 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3087 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
05e343b7 LP |
3088 | } |
3089 | ||
a16e1123 LP |
3090 | bool unit_can_serialize(Unit *u) { |
3091 | assert(u); | |
3092 | ||
3093 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
3094 | } | |
3095 | ||
8b108bd0 FB |
3096 | static int unit_serialize_cgroup_mask(FILE *f, const char *key, CGroupMask mask) { |
3097 | _cleanup_free_ char *s = NULL; | |
3098 | int r = 0; | |
3099 | ||
3100 | assert(f); | |
3101 | assert(key); | |
3102 | ||
3103 | if (mask != 0) { | |
3104 | r = cg_mask_to_string(mask, &s); | |
3105 | if (r >= 0) { | |
3106 | fputs(key, f); | |
3107 | fputc('=', f); | |
3108 | fputs(s, f); | |
3109 | fputc('\n', f); | |
3110 | } | |
3111 | } | |
3112 | return r; | |
3113 | } | |
3114 | ||
6b659ed8 LP |
3115 | static const char *ip_accounting_metric_field[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { |
3116 | [CGROUP_IP_INGRESS_BYTES] = "ip-accounting-ingress-bytes", | |
3117 | [CGROUP_IP_INGRESS_PACKETS] = "ip-accounting-ingress-packets", | |
3118 | [CGROUP_IP_EGRESS_BYTES] = "ip-accounting-egress-bytes", | |
3119 | [CGROUP_IP_EGRESS_PACKETS] = "ip-accounting-egress-packets", | |
3120 | }; | |
3121 | ||
6b78f9b4 | 3122 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
6b659ed8 | 3123 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3124 | int r; |
3125 | ||
3126 | assert(u); | |
3127 | assert(f); | |
3128 | assert(fds); | |
3129 | ||
9bdb98c5 | 3130 | if (unit_can_serialize(u)) { |
9bdb98c5 | 3131 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
3132 | if (r < 0) |
3133 | return r; | |
e0209d83 MS |
3134 | } |
3135 | ||
a483fb59 LP |
3136 | dual_timestamp_serialize(f, "state-change-timestamp", &u->state_change_timestamp); |
3137 | ||
ac155bb8 MS |
3138 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
3139 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
3140 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
3141 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
a483fb59 | 3142 | |
ac155bb8 | 3143 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); |
59fccdc5 | 3144 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 3145 | |
ac155bb8 MS |
3146 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
3147 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 3148 | |
59fccdc5 LP |
3149 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
3150 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
3151 | ||
c2756a68 | 3152 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
fe700f46 | 3153 | |
d3070fbd LP |
3154 | unit_serialize_item(u, f, "exported-invocation-id", yes_no(u->exported_invocation_id)); |
3155 | unit_serialize_item(u, f, "exported-log-level-max", yes_no(u->exported_log_level_max)); | |
3156 | unit_serialize_item(u, f, "exported-log-extra-fields", yes_no(u->exported_log_extra_fields)); | |
3157 | ||
66ebf6c0 | 3158 | unit_serialize_item_format(u, f, "cpu-usage-base", "%" PRIu64, u->cpu_usage_base); |
fe700f46 LP |
3159 | if (u->cpu_usage_last != NSEC_INFINITY) |
3160 | unit_serialize_item_format(u, f, "cpu-usage-last", "%" PRIu64, u->cpu_usage_last); | |
c2756a68 LP |
3161 | |
3162 | if (u->cgroup_path) | |
3163 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
de1d4f9b | 3164 | unit_serialize_item(u, f, "cgroup-realized", yes_no(u->cgroup_realized)); |
8b108bd0 FB |
3165 | (void) unit_serialize_cgroup_mask(f, "cgroup-realized-mask", u->cgroup_realized_mask); |
3166 | (void) unit_serialize_cgroup_mask(f, "cgroup-enabled-mask", u->cgroup_enabled_mask); | |
906c06f6 | 3167 | unit_serialize_item_format(u, f, "cgroup-bpf-realized", "%i", u->cgroup_bpf_state); |
c2756a68 | 3168 | |
00d9ef85 LP |
3169 | if (uid_is_valid(u->ref_uid)) |
3170 | unit_serialize_item_format(u, f, "ref-uid", UID_FMT, u->ref_uid); | |
3171 | if (gid_is_valid(u->ref_gid)) | |
3172 | unit_serialize_item_format(u, f, "ref-gid", GID_FMT, u->ref_gid); | |
3173 | ||
4b58153d LP |
3174 | if (!sd_id128_is_null(u->invocation_id)) |
3175 | unit_serialize_item_format(u, f, "invocation-id", SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
3176 | ||
05a98afd LP |
3177 | bus_track_serialize(u->bus_track, f, "ref"); |
3178 | ||
6b659ed8 LP |
3179 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
3180 | uint64_t v; | |
3181 | ||
3182 | r = unit_get_ip_accounting(u, m, &v); | |
3183 | if (r >= 0) | |
3184 | unit_serialize_item_format(u, f, ip_accounting_metric_field[m], "%" PRIu64, v); | |
3185 | } | |
3186 | ||
613b411c LP |
3187 | if (serialize_jobs) { |
3188 | if (u->job) { | |
3189 | fprintf(f, "job\n"); | |
05a98afd | 3190 | job_serialize(u->job, f); |
613b411c LP |
3191 | } |
3192 | ||
3193 | if (u->nop_job) { | |
3194 | fprintf(f, "job\n"); | |
05a98afd | 3195 | job_serialize(u->nop_job, f); |
613b411c LP |
3196 | } |
3197 | } | |
3198 | ||
a16e1123 LP |
3199 | /* End marker */ |
3200 | fputc('\n', f); | |
3201 | return 0; | |
3202 | } | |
3203 | ||
a34ceba6 LP |
3204 | int unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { |
3205 | assert(u); | |
3206 | assert(f); | |
3207 | assert(key); | |
3208 | ||
3209 | if (!value) | |
3210 | return 0; | |
3211 | ||
3212 | fputs(key, f); | |
3213 | fputc('=', f); | |
3214 | fputs(value, f); | |
3215 | fputc('\n', f); | |
3216 | ||
3217 | return 1; | |
3218 | } | |
3219 | ||
3220 | int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *value) { | |
3221 | _cleanup_free_ char *c = NULL; | |
3222 | ||
3223 | assert(u); | |
3224 | assert(f); | |
3225 | assert(key); | |
3226 | ||
3227 | if (!value) | |
3228 | return 0; | |
3229 | ||
3230 | c = cescape(value); | |
3231 | if (!c) | |
3232 | return -ENOMEM; | |
3233 | ||
3234 | fputs(key, f); | |
3235 | fputc('=', f); | |
3236 | fputs(c, f); | |
3237 | fputc('\n', f); | |
3238 | ||
3239 | return 1; | |
3240 | } | |
3241 | ||
3242 | int unit_serialize_item_fd(Unit *u, FILE *f, FDSet *fds, const char *key, int fd) { | |
3243 | int copy; | |
3244 | ||
3245 | assert(u); | |
3246 | assert(f); | |
3247 | assert(key); | |
3248 | ||
3249 | if (fd < 0) | |
3250 | return 0; | |
3251 | ||
3252 | copy = fdset_put_dup(fds, fd); | |
3253 | if (copy < 0) | |
3254 | return copy; | |
3255 | ||
3256 | fprintf(f, "%s=%i\n", key, copy); | |
3257 | return 1; | |
3258 | } | |
3259 | ||
a16e1123 LP |
3260 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { |
3261 | va_list ap; | |
3262 | ||
3263 | assert(u); | |
3264 | assert(f); | |
3265 | assert(key); | |
3266 | assert(format); | |
3267 | ||
3268 | fputs(key, f); | |
3269 | fputc('=', f); | |
3270 | ||
3271 | va_start(ap, format); | |
3272 | vfprintf(f, format, ap); | |
3273 | va_end(ap); | |
3274 | ||
3275 | fputc('\n', f); | |
3276 | } | |
3277 | ||
a16e1123 LP |
3278 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
3279 | int r; | |
3280 | ||
3281 | assert(u); | |
3282 | assert(f); | |
3283 | assert(fds); | |
3284 | ||
a16e1123 | 3285 | for (;;) { |
20c03b7b | 3286 | char line[LINE_MAX], *l, *v; |
6b659ed8 | 3287 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3288 | size_t k; |
3289 | ||
3290 | if (!fgets(line, sizeof(line), f)) { | |
3291 | if (feof(f)) | |
3292 | return 0; | |
3293 | return -errno; | |
3294 | } | |
3295 | ||
10f8e83c | 3296 | char_array_0(line); |
a16e1123 LP |
3297 | l = strstrip(line); |
3298 | ||
3299 | /* End marker */ | |
e911de99 | 3300 | if (isempty(l)) |
a483fb59 | 3301 | break; |
a16e1123 LP |
3302 | |
3303 | k = strcspn(l, "="); | |
3304 | ||
3305 | if (l[k] == '=') { | |
3306 | l[k] = 0; | |
3307 | v = l+k+1; | |
3308 | } else | |
3309 | v = l+k; | |
3310 | ||
cca098b0 | 3311 | if (streq(l, "job")) { |
39a18c60 MS |
3312 | if (v[0] == '\0') { |
3313 | /* new-style serialized job */ | |
9c3349e2 LP |
3314 | Job *j; |
3315 | ||
3316 | j = job_new_raw(u); | |
39a18c60 | 3317 | if (!j) |
e911de99 | 3318 | return log_oom(); |
39a18c60 | 3319 | |
05a98afd | 3320 | r = job_deserialize(j, f); |
39a18c60 MS |
3321 | if (r < 0) { |
3322 | job_free(j); | |
3323 | return r; | |
3324 | } | |
cca098b0 | 3325 | |
39a18c60 MS |
3326 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
3327 | if (r < 0) { | |
3328 | job_free(j); | |
3329 | return r; | |
3330 | } | |
e0209d83 MS |
3331 | |
3332 | r = job_install_deserialized(j); | |
3333 | if (r < 0) { | |
3334 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
3335 | job_free(j); | |
3336 | return r; | |
3337 | } | |
ed10fa8c LP |
3338 | } else /* legacy for pre-44 */ |
3339 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); | |
cca098b0 | 3340 | continue; |
a483fb59 LP |
3341 | } else if (streq(l, "state-change-timestamp")) { |
3342 | dual_timestamp_deserialize(v, &u->state_change_timestamp); | |
3343 | continue; | |
8aaf019b | 3344 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 3345 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
3346 | continue; |
3347 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 3348 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
3349 | continue; |
3350 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 3351 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
3352 | continue; |
3353 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 3354 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 3355 | continue; |
2791a8f8 | 3356 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 3357 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 3358 | continue; |
59fccdc5 LP |
3359 | } else if (streq(l, "assert-timestamp")) { |
3360 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
3361 | continue; | |
2791a8f8 | 3362 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 3363 | |
e911de99 LP |
3364 | r = parse_boolean(v); |
3365 | if (r < 0) | |
f2341e0a | 3366 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 3367 | else |
e911de99 | 3368 | u->condition_result = r; |
efbac6d2 LP |
3369 | |
3370 | continue; | |
c2756a68 | 3371 | |
59fccdc5 | 3372 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 3373 | |
e911de99 LP |
3374 | r = parse_boolean(v); |
3375 | if (r < 0) | |
f2341e0a | 3376 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 3377 | else |
e911de99 | 3378 | u->assert_result = r; |
59fccdc5 LP |
3379 | |
3380 | continue; | |
3381 | ||
c2756a68 | 3382 | } else if (streq(l, "transient")) { |
c2756a68 | 3383 | |
e911de99 LP |
3384 | r = parse_boolean(v); |
3385 | if (r < 0) | |
f2341e0a | 3386 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 3387 | else |
e911de99 | 3388 | u->transient = r; |
c2756a68 LP |
3389 | |
3390 | continue; | |
e911de99 | 3391 | |
d3070fbd LP |
3392 | } else if (streq(l, "exported-invocation-id")) { |
3393 | ||
3394 | r = parse_boolean(v); | |
3395 | if (r < 0) | |
3396 | log_unit_debug(u, "Failed to parse exported invocation ID bool %s, ignoring.", v); | |
3397 | else | |
3398 | u->exported_invocation_id = r; | |
3399 | ||
3400 | continue; | |
3401 | ||
3402 | } else if (streq(l, "exported-log-level-max")) { | |
3403 | ||
3404 | r = parse_boolean(v); | |
3405 | if (r < 0) | |
3406 | log_unit_debug(u, "Failed to parse exported log level max bool %s, ignoring.", v); | |
3407 | else | |
3408 | u->exported_log_level_max = r; | |
3409 | ||
3410 | continue; | |
3411 | ||
3412 | } else if (streq(l, "exported-log-extra-fields")) { | |
3413 | ||
3414 | r = parse_boolean(v); | |
3415 | if (r < 0) | |
3416 | log_unit_debug(u, "Failed to parse exported log extra fields bool %s, ignoring.", v); | |
3417 | else | |
3418 | u->exported_log_extra_fields = r; | |
3419 | ||
3420 | continue; | |
3421 | ||
fe700f46 | 3422 | } else if (STR_IN_SET(l, "cpu-usage-base", "cpuacct-usage-base")) { |
5ad096b3 | 3423 | |
66ebf6c0 | 3424 | r = safe_atou64(v, &u->cpu_usage_base); |
5ad096b3 | 3425 | if (r < 0) |
fe700f46 LP |
3426 | log_unit_debug(u, "Failed to parse CPU usage base %s, ignoring.", v); |
3427 | ||
3428 | continue; | |
3429 | ||
3430 | } else if (streq(l, "cpu-usage-last")) { | |
3431 | ||
3432 | r = safe_atou64(v, &u->cpu_usage_last); | |
3433 | if (r < 0) | |
3434 | log_unit_debug(u, "Failed to read CPU usage last %s, ignoring.", v); | |
5ad096b3 | 3435 | |
0f908397 | 3436 | continue; |
4e595329 | 3437 | |
e911de99 | 3438 | } else if (streq(l, "cgroup")) { |
72673e86 | 3439 | |
e911de99 LP |
3440 | r = unit_set_cgroup_path(u, v); |
3441 | if (r < 0) | |
f2341e0a | 3442 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 3443 | |
efdb0237 LP |
3444 | (void) unit_watch_cgroup(u); |
3445 | ||
de1d4f9b WF |
3446 | continue; |
3447 | } else if (streq(l, "cgroup-realized")) { | |
3448 | int b; | |
3449 | ||
3450 | b = parse_boolean(v); | |
3451 | if (b < 0) | |
3452 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
3453 | else | |
3454 | u->cgroup_realized = b; | |
3455 | ||
c2756a68 | 3456 | continue; |
00d9ef85 | 3457 | |
8b108bd0 FB |
3458 | } else if (streq(l, "cgroup-realized-mask")) { |
3459 | ||
3460 | r = cg_mask_from_string(v, &u->cgroup_realized_mask); | |
3461 | if (r < 0) | |
3462 | log_unit_debug(u, "Failed to parse cgroup-realized-mask %s, ignoring.", v); | |
3463 | continue; | |
3464 | ||
3465 | } else if (streq(l, "cgroup-enabled-mask")) { | |
3466 | ||
3467 | r = cg_mask_from_string(v, &u->cgroup_enabled_mask); | |
3468 | if (r < 0) | |
3469 | log_unit_debug(u, "Failed to parse cgroup-enabled-mask %s, ignoring.", v); | |
3470 | continue; | |
3471 | ||
906c06f6 DM |
3472 | } else if (streq(l, "cgroup-bpf-realized")) { |
3473 | int i; | |
3474 | ||
3475 | r = safe_atoi(v, &i); | |
3476 | if (r < 0) | |
3477 | log_unit_debug(u, "Failed to parse cgroup BPF state %s, ignoring.", v); | |
3478 | else | |
3479 | u->cgroup_bpf_state = | |
3480 | i < 0 ? UNIT_CGROUP_BPF_INVALIDATED : | |
3481 | i > 0 ? UNIT_CGROUP_BPF_ON : | |
3482 | UNIT_CGROUP_BPF_OFF; | |
3483 | ||
3484 | continue; | |
3485 | ||
00d9ef85 LP |
3486 | } else if (streq(l, "ref-uid")) { |
3487 | uid_t uid; | |
3488 | ||
3489 | r = parse_uid(v, &uid); | |
3490 | if (r < 0) | |
3491 | log_unit_debug(u, "Failed to parse referenced UID %s, ignoring.", v); | |
3492 | else | |
3493 | unit_ref_uid_gid(u, uid, GID_INVALID); | |
3494 | ||
3495 | continue; | |
3496 | ||
3497 | } else if (streq(l, "ref-gid")) { | |
3498 | gid_t gid; | |
3499 | ||
3500 | r = parse_gid(v, &gid); | |
3501 | if (r < 0) | |
3502 | log_unit_debug(u, "Failed to parse referenced GID %s, ignoring.", v); | |
3503 | else | |
3504 | unit_ref_uid_gid(u, UID_INVALID, gid); | |
3505 | ||
05a98afd LP |
3506 | } else if (streq(l, "ref")) { |
3507 | ||
3508 | r = strv_extend(&u->deserialized_refs, v); | |
3509 | if (r < 0) | |
3510 | log_oom(); | |
3511 | ||
4b58153d LP |
3512 | continue; |
3513 | } else if (streq(l, "invocation-id")) { | |
3514 | sd_id128_t id; | |
3515 | ||
3516 | r = sd_id128_from_string(v, &id); | |
3517 | if (r < 0) | |
3518 | log_unit_debug(u, "Failed to parse invocation id %s, ignoring.", v); | |
3519 | else { | |
3520 | r = unit_set_invocation_id(u, id); | |
3521 | if (r < 0) | |
3522 | log_unit_warning_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
3523 | } | |
3524 | ||
00d9ef85 | 3525 | continue; |
8aaf019b | 3526 | } |
cca098b0 | 3527 | |
6b659ed8 LP |
3528 | /* Check if this is an IP accounting metric serialization field */ |
3529 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) | |
3530 | if (streq(l, ip_accounting_metric_field[m])) | |
3531 | break; | |
3532 | if (m < _CGROUP_IP_ACCOUNTING_METRIC_MAX) { | |
3533 | uint64_t c; | |
3534 | ||
3535 | r = safe_atou64(v, &c); | |
3536 | if (r < 0) | |
3537 | log_unit_debug(u, "Failed to parse IP accounting value %s, ignoring.", v); | |
3538 | else | |
3539 | u->ip_accounting_extra[m] = c; | |
3540 | continue; | |
3541 | } | |
3542 | ||
9bdb98c5 | 3543 | if (unit_can_serialize(u)) { |
e8a565cb YW |
3544 | r = exec_runtime_deserialize_compat(u, l, v, fds); |
3545 | if (r < 0) { | |
3546 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); | |
3547 | continue; | |
9bdb98c5 LP |
3548 | } |
3549 | ||
e8a565cb YW |
3550 | /* Returns positive if key was handled by the call */ |
3551 | if (r > 0) | |
3552 | continue; | |
3553 | ||
9bdb98c5 | 3554 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); |
613b411c | 3555 | if (r < 0) |
f2341e0a | 3556 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 3557 | } |
a16e1123 | 3558 | } |
a483fb59 LP |
3559 | |
3560 | /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is | |
3561 | * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from | |
1f133e0d | 3562 | * before 228 where the base for timeouts was not persistent across reboots. */ |
a483fb59 LP |
3563 | |
3564 | if (!dual_timestamp_is_set(&u->state_change_timestamp)) | |
3565 | dual_timestamp_get(&u->state_change_timestamp); | |
3566 | ||
58d83430 LP |
3567 | /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied |
3568 | * after we are done. For that we invalidate anything already realized, so that we can realize it again. */ | |
3569 | unit_invalidate_cgroup(u, _CGROUP_MASK_ALL); | |
3570 | unit_invalidate_cgroup_bpf(u); | |
3571 | ||
a483fb59 | 3572 | return 0; |
a16e1123 LP |
3573 | } |
3574 | ||
07429866 ZJS |
3575 | void unit_deserialize_skip(FILE *f) { |
3576 | assert(f); | |
3577 | ||
3578 | /* Skip serialized data for this unit. We don't know what it is. */ | |
3579 | ||
3580 | for (;;) { | |
3581 | char line[LINE_MAX], *l; | |
3582 | ||
3583 | if (!fgets(line, sizeof line, f)) | |
3584 | return; | |
3585 | ||
3586 | char_array_0(line); | |
3587 | l = strstrip(line); | |
3588 | ||
3589 | /* End marker */ | |
3590 | if (isempty(l)) | |
3591 | return; | |
3592 | } | |
3593 | } | |
3594 | ||
3595 | ||
eef85c4a | 3596 | int unit_add_node_dependency(Unit *u, const char *what, bool wants, UnitDependency dep, UnitDependencyMask mask) { |
6e2ef85b | 3597 | Unit *device; |
68eda4bd | 3598 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
3599 | int r; |
3600 | ||
3601 | assert(u); | |
3602 | ||
6e2ef85b | 3603 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3604 | if (isempty(what)) |
3605 | return 0; | |
6e2ef85b | 3606 | |
8407a5d0 | 3607 | if (!is_device_path(what)) |
6e2ef85b LP |
3608 | return 0; |
3609 | ||
47bc12e1 LP |
3610 | /* When device units aren't supported (such as in a |
3611 | * container), don't create dependencies on them. */ | |
1c2e9646 | 3612 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3613 | return 0; |
3614 | ||
7410616c LP |
3615 | r = unit_name_from_path(what, ".device", &e); |
3616 | if (r < 0) | |
3617 | return r; | |
6e2ef85b | 3618 | |
ac155bb8 | 3619 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3620 | if (r < 0) |
3621 | return r; | |
3622 | ||
ebc8968b FB |
3623 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3624 | dep = UNIT_BINDS_TO; | |
3625 | ||
9d06297e | 3626 | r = unit_add_two_dependencies(u, UNIT_AFTER, |
463d0d15 | 3627 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, |
eef85c4a | 3628 | device, true, mask); |
faa368e3 | 3629 | if (r < 0) |
6e2ef85b LP |
3630 | return r; |
3631 | ||
faa368e3 | 3632 | if (wants) { |
eef85c4a | 3633 | r = unit_add_dependency(device, UNIT_WANTS, u, false, mask); |
faa368e3 | 3634 | if (r < 0) |
6e2ef85b | 3635 | return r; |
faa368e3 | 3636 | } |
6e2ef85b LP |
3637 | |
3638 | return 0; | |
3639 | } | |
a16e1123 | 3640 | |
be847e82 | 3641 | int unit_coldplug(Unit *u) { |
05a98afd LP |
3642 | int r = 0, q; |
3643 | char **i; | |
cca098b0 LP |
3644 | |
3645 | assert(u); | |
3646 | ||
f78f265f LP |
3647 | /* Make sure we don't enter a loop, when coldplugging |
3648 | * recursively. */ | |
3649 | if (u->coldplugged) | |
3650 | return 0; | |
3651 | ||
3652 | u->coldplugged = true; | |
3653 | ||
05a98afd LP |
3654 | STRV_FOREACH(i, u->deserialized_refs) { |
3655 | q = bus_unit_track_add_name(u, *i); | |
3656 | if (q < 0 && r >= 0) | |
3657 | r = q; | |
3658 | } | |
3659 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 3660 | |
05a98afd LP |
3661 | if (UNIT_VTABLE(u)->coldplug) { |
3662 | q = UNIT_VTABLE(u)->coldplug(u); | |
3663 | if (q < 0 && r >= 0) | |
3664 | r = q; | |
3665 | } | |
5a6158b6 | 3666 | |
05a98afd LP |
3667 | if (u->job) { |
3668 | q = job_coldplug(u->job); | |
3669 | if (q < 0 && r >= 0) | |
3670 | r = q; | |
3671 | } | |
cca098b0 | 3672 | |
05a98afd | 3673 | return r; |
cca098b0 LP |
3674 | } |
3675 | ||
ba25d39e | 3676 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3677 | struct stat st; |
3678 | ||
3679 | if (!path) | |
3680 | return false; | |
3681 | ||
77969722 LP |
3682 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3683 | * are never out-of-date. */ | |
3684 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3685 | return false; | |
3686 | ||
21b95806 ZJS |
3687 | if (stat(path, &st) < 0) |
3688 | /* What, cannot access this anymore? */ | |
3689 | return true; | |
3690 | ||
ba25d39e ZJS |
3691 | if (path_masked) |
3692 | /* For masked files check if they are still so */ | |
3693 | return !null_or_empty(&st); | |
3694 | else | |
3a8db9fe | 3695 | /* For non-empty files check the mtime */ |
87ec20ef | 3696 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3697 | |
3698 | return false; | |
3699 | } | |
3700 | ||
45fb0699 | 3701 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
3702 | _cleanup_strv_free_ char **t = NULL; |
3703 | char **path; | |
1b64d026 | 3704 | |
45fb0699 LP |
3705 | assert(u); |
3706 | ||
ba25d39e ZJS |
3707 | /* For unit files, we allow masking… */ |
3708 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3709 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3710 | return true; |
5f4b19f4 | 3711 | |
ba25d39e ZJS |
3712 | /* Source paths should not be masked… */ |
3713 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3714 | return true; |
ae7a7182 | 3715 | |
19a44dfe LR |
3716 | if (u->load_state == UNIT_LOADED) |
3717 | (void) unit_find_dropin_paths(u, &t); | |
ab932a62 LP |
3718 | if (!strv_equal(u->dropin_paths, t)) |
3719 | return true; | |
6d10d308 | 3720 | |
ba25d39e | 3721 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3722 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3723 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3724 | return true; |
21b95806 | 3725 | |
ab932a62 | 3726 | return false; |
45fb0699 LP |
3727 | } |
3728 | ||
fdf20a31 | 3729 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3730 | assert(u); |
3731 | ||
fdf20a31 MM |
3732 | if (UNIT_VTABLE(u)->reset_failed) |
3733 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 LP |
3734 | |
3735 | RATELIMIT_RESET(u->start_limit); | |
3736 | u->start_limit_hit = false; | |
5632e374 LP |
3737 | } |
3738 | ||
a7f241db LP |
3739 | Unit *unit_following(Unit *u) { |
3740 | assert(u); | |
3741 | ||
3742 | if (UNIT_VTABLE(u)->following) | |
3743 | return UNIT_VTABLE(u)->following(u); | |
3744 | ||
3745 | return NULL; | |
3746 | } | |
3747 | ||
31afa0a4 | 3748 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3749 | assert(u); |
3750 | ||
31afa0a4 LP |
3751 | /* This call does check the current state of the unit. It's |
3752 | * hence useful to be called from state change calls of the | |
3753 | * unit itself, where the state isn't updated yet. This is | |
3754 | * different from unit_inactive_or_pending() which checks both | |
3755 | * the current state and for a queued job. */ | |
18ffdfda | 3756 | |
31afa0a4 LP |
3757 | return u->job && u->job->type == JOB_STOP; |
3758 | } | |
3759 | ||
3760 | bool unit_inactive_or_pending(Unit *u) { | |
3761 | assert(u); | |
3762 | ||
3763 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3764 | |
d956ac29 LP |
3765 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3766 | return true; | |
3767 | ||
31afa0a4 | 3768 | if (unit_stop_pending(u)) |
18ffdfda LP |
3769 | return true; |
3770 | ||
3771 | return false; | |
3772 | } | |
3773 | ||
31afa0a4 | 3774 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3775 | assert(u); |
3776 | ||
f60c2665 | 3777 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3778 | |
3779 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3780 | return true; | |
3781 | ||
ac155bb8 | 3782 | if (u->job && |
3742095b | 3783 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
3784 | return true; |
3785 | ||
3786 | return false; | |
3787 | } | |
3788 | ||
deb4e708 MK |
3789 | bool unit_will_restart(Unit *u) { |
3790 | assert(u); | |
3791 | ||
3792 | if (!UNIT_VTABLE(u)->will_restart) | |
3793 | return false; | |
3794 | ||
3795 | return UNIT_VTABLE(u)->will_restart(u); | |
3796 | } | |
3797 | ||
718db961 | 3798 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3799 | assert(u); |
3800 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 3801 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 3802 | |
8a0867d6 | 3803 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3804 | return -EOPNOTSUPP; |
8a0867d6 | 3805 | |
c74f17d9 | 3806 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3807 | } |
3808 | ||
82659fd7 LP |
3809 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
3810 | Set *pid_set; | |
3811 | int r; | |
3812 | ||
d5099efc | 3813 | pid_set = set_new(NULL); |
82659fd7 LP |
3814 | if (!pid_set) |
3815 | return NULL; | |
3816 | ||
3817 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3818 | if (main_pid > 0) { | |
fea72cc0 | 3819 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 LP |
3820 | if (r < 0) |
3821 | goto fail; | |
3822 | } | |
3823 | ||
3824 | if (control_pid > 0) { | |
fea72cc0 | 3825 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 LP |
3826 | if (r < 0) |
3827 | goto fail; | |
3828 | } | |
3829 | ||
3830 | return pid_set; | |
3831 | ||
3832 | fail: | |
3833 | set_free(pid_set); | |
3834 | return NULL; | |
3835 | } | |
3836 | ||
d91c34f2 LP |
3837 | int unit_kill_common( |
3838 | Unit *u, | |
3839 | KillWho who, | |
3840 | int signo, | |
3841 | pid_t main_pid, | |
3842 | pid_t control_pid, | |
718db961 | 3843 | sd_bus_error *error) { |
d91c34f2 | 3844 | |
814cc562 | 3845 | int r = 0; |
ac5e3a50 | 3846 | bool killed = false; |
814cc562 | 3847 | |
ac5e3a50 | 3848 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3849 | if (main_pid < 0) |
7358dc02 | 3850 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 3851 | else if (main_pid == 0) |
7358dc02 | 3852 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3853 | } |
3854 | ||
ac5e3a50 | 3855 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3856 | if (control_pid < 0) |
7358dc02 | 3857 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 3858 | else if (control_pid == 0) |
7358dc02 | 3859 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3860 | } |
3861 | ||
ac5e3a50 JS |
3862 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3863 | if (control_pid > 0) { | |
814cc562 MS |
3864 | if (kill(control_pid, signo) < 0) |
3865 | r = -errno; | |
ac5e3a50 JS |
3866 | else |
3867 | killed = true; | |
3868 | } | |
814cc562 | 3869 | |
ac5e3a50 JS |
3870 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3871 | if (main_pid > 0) { | |
814cc562 MS |
3872 | if (kill(main_pid, signo) < 0) |
3873 | r = -errno; | |
ac5e3a50 JS |
3874 | else |
3875 | killed = true; | |
3876 | } | |
814cc562 | 3877 | |
ac5e3a50 | 3878 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3879 | _cleanup_set_free_ Set *pid_set = NULL; |
3880 | int q; | |
3881 | ||
82659fd7 LP |
3882 | /* Exclude the main/control pids from being killed via the cgroup */ |
3883 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3884 | if (!pid_set) |
3885 | return -ENOMEM; | |
3886 | ||
1d98fef1 | 3887 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, NULL, NULL); |
4c701096 | 3888 | if (q < 0 && !IN_SET(q, -EAGAIN, -ESRCH, -ENOENT)) |
814cc562 | 3889 | r = q; |
ac5e3a50 JS |
3890 | else |
3891 | killed = true; | |
814cc562 MS |
3892 | } |
3893 | ||
201f0c91 | 3894 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL)) |
ac5e3a50 JS |
3895 | return -ESRCH; |
3896 | ||
814cc562 MS |
3897 | return r; |
3898 | } | |
3899 | ||
6210e7fc LP |
3900 | int unit_following_set(Unit *u, Set **s) { |
3901 | assert(u); | |
3902 | assert(s); | |
3903 | ||
3904 | if (UNIT_VTABLE(u)->following_set) | |
3905 | return UNIT_VTABLE(u)->following_set(u, s); | |
3906 | ||
3907 | *s = NULL; | |
3908 | return 0; | |
3909 | } | |
3910 | ||
a4375746 | 3911 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
3912 | int r; |
3913 | ||
a4375746 LP |
3914 | assert(u); |
3915 | ||
0ec0deaa LP |
3916 | if (u->unit_file_state < 0 && u->fragment_path) { |
3917 | r = unit_file_get_state( | |
463d0d15 | 3918 | u->manager->unit_file_scope, |
0ec0deaa | 3919 | NULL, |
9ea3a0e7 | 3920 | u->id, |
0ec0deaa LP |
3921 | &u->unit_file_state); |
3922 | if (r < 0) | |
3923 | u->unit_file_state = UNIT_FILE_BAD; | |
3924 | } | |
a4375746 | 3925 | |
ac155bb8 | 3926 | return u->unit_file_state; |
a4375746 LP |
3927 | } |
3928 | ||
d2dc52db LP |
3929 | int unit_get_unit_file_preset(Unit *u) { |
3930 | assert(u); | |
3931 | ||
3932 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3933 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 3934 | u->manager->unit_file_scope, |
0ec0deaa LP |
3935 | NULL, |
3936 | basename(u->fragment_path)); | |
d2dc52db LP |
3937 | |
3938 | return u->unit_file_preset; | |
3939 | } | |
3940 | ||
7f7d01ed | 3941 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 3942 | assert(ref); |
7f7d01ed ZJS |
3943 | assert(source); |
3944 | assert(target); | |
57020a3a | 3945 | |
7f7d01ed | 3946 | if (ref->target) |
57020a3a LP |
3947 | unit_ref_unset(ref); |
3948 | ||
7f7d01ed ZJS |
3949 | ref->source = source; |
3950 | ref->target = target; | |
3951 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
3952 | return target; | |
57020a3a LP |
3953 | } |
3954 | ||
3955 | void unit_ref_unset(UnitRef *ref) { | |
3956 | assert(ref); | |
3957 | ||
7f7d01ed | 3958 | if (!ref->target) |
57020a3a LP |
3959 | return; |
3960 | ||
b75102e5 LP |
3961 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
3962 | * be unreferenced now. */ | |
7f7d01ed | 3963 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 3964 | |
7f7d01ed ZJS |
3965 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
3966 | ref->source = ref->target = NULL; | |
57020a3a LP |
3967 | } |
3968 | ||
29206d46 LP |
3969 | static int user_from_unit_name(Unit *u, char **ret) { |
3970 | ||
3971 | static const uint8_t hash_key[] = { | |
3972 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
3973 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
3974 | }; | |
3975 | ||
3976 | _cleanup_free_ char *n = NULL; | |
3977 | int r; | |
3978 | ||
3979 | r = unit_name_to_prefix(u->id, &n); | |
3980 | if (r < 0) | |
3981 | return r; | |
3982 | ||
3983 | if (valid_user_group_name(n)) { | |
ae2a15bc | 3984 | *ret = TAKE_PTR(n); |
29206d46 LP |
3985 | return 0; |
3986 | } | |
3987 | ||
3988 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
3989 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
3990 | return -ENOMEM; | |
3991 | ||
3992 | return 0; | |
3993 | } | |
3994 | ||
598459ce LP |
3995 | int unit_patch_contexts(Unit *u) { |
3996 | CGroupContext *cc; | |
3997 | ExecContext *ec; | |
cba6e062 LP |
3998 | unsigned i; |
3999 | int r; | |
4000 | ||
e06c73cc | 4001 | assert(u); |
e06c73cc | 4002 | |
598459ce LP |
4003 | /* Patch in the manager defaults into the exec and cgroup |
4004 | * contexts, _after_ the rest of the settings have been | |
4005 | * initialized */ | |
085afe36 | 4006 | |
598459ce LP |
4007 | ec = unit_get_exec_context(u); |
4008 | if (ec) { | |
4009 | /* This only copies in the ones that need memory */ | |
4010 | for (i = 0; i < _RLIMIT_MAX; i++) | |
4011 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
4012 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
4013 | if (!ec->rlimit[i]) | |
4014 | return -ENOMEM; | |
4015 | } | |
4016 | ||
463d0d15 | 4017 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4018 | !ec->working_directory) { |
4019 | ||
4020 | r = get_home_dir(&ec->working_directory); | |
4021 | if (r < 0) | |
4022 | return r; | |
4c08c824 LP |
4023 | |
4024 | /* Allow user services to run, even if the | |
4025 | * home directory is missing */ | |
4026 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4027 | } |
4028 | ||
598459ce | 4029 | if (ec->private_devices) |
2cd0a735 | 4030 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4031 | |
4032 | if (ec->protect_kernel_modules) | |
4033 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 LP |
4034 | |
4035 | if (ec->dynamic_user) { | |
4036 | if (!ec->user) { | |
4037 | r = user_from_unit_name(u, &ec->user); | |
4038 | if (r < 0) | |
4039 | return r; | |
4040 | } | |
4041 | ||
4042 | if (!ec->group) { | |
4043 | ec->group = strdup(ec->user); | |
4044 | if (!ec->group) | |
4045 | return -ENOMEM; | |
4046 | } | |
4047 | ||
63bb64a0 LP |
4048 | /* If the dynamic user option is on, let's make sure that the unit can't leave its UID/GID |
4049 | * around in the file system or on IPC objects. Hence enforce a strict sandbox. */ | |
4050 | ||
29206d46 | 4051 | ec->private_tmp = true; |
00d9ef85 | 4052 | ec->remove_ipc = true; |
63bb64a0 LP |
4053 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4054 | if (ec->protect_home == PROTECT_HOME_NO) | |
4055 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
29206d46 | 4056 | } |
cba6e062 LP |
4057 | } |
4058 | ||
598459ce LP |
4059 | cc = unit_get_cgroup_context(u); |
4060 | if (cc) { | |
f513e420 | 4061 | |
598459ce LP |
4062 | if (ec && |
4063 | ec->private_devices && | |
4064 | cc->device_policy == CGROUP_AUTO) | |
4065 | cc->device_policy = CGROUP_CLOSED; | |
4066 | } | |
f1660f96 | 4067 | |
cba6e062 | 4068 | return 0; |
e06c73cc LP |
4069 | } |
4070 | ||
3ef63c31 LP |
4071 | ExecContext *unit_get_exec_context(Unit *u) { |
4072 | size_t offset; | |
4073 | assert(u); | |
4074 | ||
598459ce LP |
4075 | if (u->type < 0) |
4076 | return NULL; | |
4077 | ||
3ef63c31 LP |
4078 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4079 | if (offset <= 0) | |
4080 | return NULL; | |
4081 | ||
4082 | return (ExecContext*) ((uint8_t*) u + offset); | |
4083 | } | |
4084 | ||
718db961 LP |
4085 | KillContext *unit_get_kill_context(Unit *u) { |
4086 | size_t offset; | |
4087 | assert(u); | |
4088 | ||
598459ce LP |
4089 | if (u->type < 0) |
4090 | return NULL; | |
4091 | ||
718db961 LP |
4092 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4093 | if (offset <= 0) | |
4094 | return NULL; | |
4095 | ||
4096 | return (KillContext*) ((uint8_t*) u + offset); | |
4097 | } | |
4098 | ||
4ad49000 LP |
4099 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4100 | size_t offset; | |
4101 | ||
598459ce LP |
4102 | if (u->type < 0) |
4103 | return NULL; | |
4104 | ||
4ad49000 LP |
4105 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4106 | if (offset <= 0) | |
4107 | return NULL; | |
4108 | ||
4109 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4110 | } | |
4111 | ||
613b411c LP |
4112 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4113 | size_t offset; | |
4114 | ||
598459ce LP |
4115 | if (u->type < 0) |
4116 | return NULL; | |
4117 | ||
613b411c LP |
4118 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4119 | if (offset <= 0) | |
4120 | return NULL; | |
4121 | ||
4122 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4123 | } | |
4124 | ||
2e59b241 | 4125 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4126 | assert(u); |
4127 | ||
2e59b241 | 4128 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4129 | return NULL; |
4130 | ||
39591351 LP |
4131 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4132 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4133 | |
2e59b241 | 4134 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4135 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4136 | |
2e59b241 LP |
4137 | if (flags & UNIT_RUNTIME) |
4138 | return u->manager->lookup_paths.runtime_control; | |
4139 | ||
39591351 | 4140 | return NULL; |
71645aca LP |
4141 | } |
4142 | ||
2e59b241 LP |
4143 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4144 | char *ret = NULL; | |
4145 | ||
4146 | if (!s) | |
4147 | return NULL; | |
4148 | ||
4149 | /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated | |
4150 | * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is | |
4151 | * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly | |
4152 | * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is | |
4153 | * not specified, then the return value always needs to be freed. Callers can use this to optimize memory | |
4154 | * allocations. */ | |
4155 | ||
4156 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
4157 | ret = specifier_escape(s); | |
4158 | if (!ret) | |
4159 | return NULL; | |
4160 | ||
4161 | s = ret; | |
4162 | } | |
4163 | ||
4164 | if (flags & UNIT_ESCAPE_C) { | |
4165 | char *a; | |
4166 | ||
4167 | a = cescape(s); | |
4168 | free(ret); | |
4169 | if (!a) | |
4170 | return NULL; | |
4171 | ||
4172 | ret = a; | |
4173 | } | |
4174 | ||
4175 | if (buf) { | |
4176 | *buf = ret; | |
4177 | return ret ?: (char*) s; | |
4178 | } | |
4179 | ||
4180 | return ret ?: strdup(s); | |
4181 | } | |
4182 | ||
4183 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4184 | _cleanup_free_ char *result = NULL; | |
4185 | size_t n = 0, allocated = 0; | |
ae2a15bc | 4186 | char **i; |
2e59b241 LP |
4187 | |
4188 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a | |
4189 | * way suitable for ExecStart= stanzas */ | |
4190 | ||
4191 | STRV_FOREACH(i, l) { | |
4192 | _cleanup_free_ char *buf = NULL; | |
4193 | const char *p; | |
4194 | size_t a; | |
4195 | char *q; | |
4196 | ||
4197 | p = unit_escape_setting(*i, flags, &buf); | |
4198 | if (!p) | |
4199 | return NULL; | |
4200 | ||
4201 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
4202 | if (!GREEDY_REALLOC(result, allocated, n + a + 1)) | |
4203 | return NULL; | |
4204 | ||
4205 | q = result + n; | |
4206 | if (n > 0) | |
4207 | *(q++) = ' '; | |
4208 | ||
4209 | *(q++) = '"'; | |
4210 | q = stpcpy(q, p); | |
4211 | *(q++) = '"'; | |
4212 | ||
4213 | n += a; | |
4214 | } | |
4215 | ||
4216 | if (!GREEDY_REALLOC(result, allocated, n + 1)) | |
4217 | return NULL; | |
4218 | ||
4219 | result[n] = 0; | |
4220 | ||
ae2a15bc | 4221 | return TAKE_PTR(result); |
2e59b241 LP |
4222 | } |
4223 | ||
4224 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4225 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4226 | const char *dir, *wrapped; |
26d04f86 | 4227 | int r; |
71645aca LP |
4228 | |
4229 | assert(u); | |
2e59b241 LP |
4230 | assert(name); |
4231 | assert(data); | |
4232 | ||
4233 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4234 | return 0; | |
4235 | ||
4236 | data = unit_escape_setting(data, flags, &escaped); | |
4237 | if (!data) | |
4238 | return -ENOMEM; | |
4239 | ||
4240 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4241 | * previous section header is the same */ | |
4242 | ||
4243 | if (flags & UNIT_PRIVATE) { | |
4244 | if (!UNIT_VTABLE(u)->private_section) | |
4245 | return -EINVAL; | |
4246 | ||
4247 | if (!u->transient_file || u->last_section_private < 0) | |
4248 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4249 | else if (u->last_section_private == 0) | |
4250 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4251 | } else { | |
4252 | if (!u->transient_file || u->last_section_private < 0) | |
4253 | data = strjoina("[Unit]\n", data); | |
4254 | else if (u->last_section_private > 0) | |
4255 | data = strjoina("\n[Unit]\n", data); | |
4256 | } | |
71645aca | 4257 | |
4f4afc88 LP |
4258 | if (u->transient_file) { |
4259 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4260 | * write to the transient unit file. */ | |
4261 | fputs(data, u->transient_file); | |
4f4afc88 | 4262 | |
2e59b241 LP |
4263 | if (!endswith(data, "\n")) |
4264 | fputc('\n', u->transient_file); | |
4265 | ||
4266 | /* Remember which section we wrote this entry to */ | |
4267 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4268 | return 0; |
2e59b241 | 4269 | } |
8e2af478 | 4270 | |
2e59b241 | 4271 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4272 | if (!dir) |
4273 | return -EINVAL; | |
71645aca | 4274 | |
2a9a6f8a | 4275 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4276 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4277 | data, |
4278 | "\n"); | |
e20b2a86 | 4279 | |
815b09d3 | 4280 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4281 | if (r < 0) |
4282 | return r; | |
4283 | ||
45639f1b | 4284 | (void) mkdir_p_label(p, 0755); |
2a9a6f8a | 4285 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4286 | if (r < 0) |
4287 | return r; | |
4288 | ||
815b09d3 | 4289 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4290 | if (r < 0) |
4291 | return r; | |
815b09d3 | 4292 | q = NULL; |
adb76a70 | 4293 | |
adb76a70 WC |
4294 | strv_uniq(u->dropin_paths); |
4295 | ||
4296 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4297 | ||
4298 | return 0; | |
26d04f86 | 4299 | } |
71645aca | 4300 | |
2e59b241 | 4301 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4302 | _cleanup_free_ char *p = NULL; |
4303 | va_list ap; | |
4304 | int r; | |
4305 | ||
4306 | assert(u); | |
4307 | assert(name); | |
4308 | assert(format); | |
4309 | ||
2e59b241 | 4310 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4311 | return 0; |
4312 | ||
4313 | va_start(ap, format); | |
4314 | r = vasprintf(&p, format, ap); | |
4315 | va_end(ap); | |
4316 | ||
4317 | if (r < 0) | |
4318 | return -ENOMEM; | |
4319 | ||
2e59b241 | 4320 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4321 | } |
71645aca | 4322 | |
c2756a68 | 4323 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4324 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4325 | FILE *f; |
4f4afc88 | 4326 | |
c2756a68 LP |
4327 | assert(u); |
4328 | ||
3f5e8115 LP |
4329 | if (!UNIT_VTABLE(u)->can_transient) |
4330 | return -EOPNOTSUPP; | |
4331 | ||
45639f1b LP |
4332 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4333 | ||
605405c6 | 4334 | path = strjoin(u->manager->lookup_paths.transient, "/", u->id); |
4f4afc88 LP |
4335 | if (!path) |
4336 | return -ENOMEM; | |
4337 | ||
4338 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4339 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4340 | ||
78e334b5 | 4341 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 4342 | f = fopen(path, "we"); |
0126c8f3 | 4343 | if (!f) |
78e334b5 | 4344 | return -errno; |
4f4afc88 LP |
4345 | } |
4346 | ||
0126c8f3 | 4347 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4348 | u->transient_file = f; |
4349 | ||
0126c8f3 | 4350 | free_and_replace(u->fragment_path, path); |
7c65093a | 4351 | |
7c65093a LP |
4352 | u->source_path = mfree(u->source_path); |
4353 | u->dropin_paths = strv_free(u->dropin_paths); | |
4354 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4355 | ||
4f4afc88 LP |
4356 | u->load_state = UNIT_STUB; |
4357 | u->load_error = 0; | |
4358 | u->transient = true; | |
4359 | ||
7c65093a LP |
4360 | unit_add_to_dbus_queue(u); |
4361 | unit_add_to_gc_queue(u); | |
c2756a68 | 4362 | |
4f4afc88 LP |
4363 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4364 | u->transient_file); | |
4365 | ||
3f5e8115 | 4366 | return 0; |
c2756a68 LP |
4367 | } |
4368 | ||
1d98fef1 LP |
4369 | static void log_kill(pid_t pid, int sig, void *userdata) { |
4370 | _cleanup_free_ char *comm = NULL; | |
4371 | ||
4372 | (void) get_process_comm(pid, &comm); | |
4373 | ||
4374 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4375 | only, like for example systemd's own PAM stub process. */ | |
4376 | if (comm && comm[0] == '(') | |
4377 | return; | |
4378 | ||
4379 | log_unit_notice(userdata, | |
4380 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4381 | pid, | |
4382 | strna(comm), | |
4383 | signal_to_string(sig)); | |
4384 | } | |
4385 | ||
4386 | static int operation_to_signal(KillContext *c, KillOperation k) { | |
4387 | assert(c); | |
4388 | ||
4389 | switch (k) { | |
4390 | ||
4391 | case KILL_TERMINATE: | |
4392 | case KILL_TERMINATE_AND_LOG: | |
4393 | return c->kill_signal; | |
4394 | ||
4395 | case KILL_KILL: | |
4396 | return SIGKILL; | |
4397 | ||
4398 | case KILL_ABORT: | |
4399 | return SIGABRT; | |
4400 | ||
4401 | default: | |
4402 | assert_not_reached("KillOperation unknown"); | |
4403 | } | |
4404 | } | |
4405 | ||
cd2086fe LP |
4406 | int unit_kill_context( |
4407 | Unit *u, | |
4408 | KillContext *c, | |
db2cb23b | 4409 | KillOperation k, |
cd2086fe LP |
4410 | pid_t main_pid, |
4411 | pid_t control_pid, | |
4412 | bool main_pid_alien) { | |
4413 | ||
1d98fef1 | 4414 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4415 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4416 | int sig, r; |
cd2086fe LP |
4417 | |
4418 | assert(u); | |
4419 | assert(c); | |
4420 | ||
59ec09a8 ZJS |
4421 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. |
4422 | * Returns > 0 if we killed something worth waiting for, 0 otherwise. */ | |
1d98fef1 | 4423 | |
cd2086fe LP |
4424 | if (c->kill_mode == KILL_NONE) |
4425 | return 0; | |
4426 | ||
1d98fef1 LP |
4427 | sig = operation_to_signal(c, k); |
4428 | ||
4429 | send_sighup = | |
4430 | c->send_sighup && | |
4431 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4432 | sig != SIGHUP; | |
4433 | ||
59ec09a8 ZJS |
4434 | if (k != KILL_TERMINATE || IN_SET(sig, SIGKILL, SIGABRT)) |
4435 | log_func = log_kill; | |
cd2086fe LP |
4436 | |
4437 | if (main_pid > 0) { | |
1d98fef1 LP |
4438 | if (log_func) |
4439 | log_func(main_pid, sig, u); | |
cd2086fe | 4440 | |
1d98fef1 | 4441 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4442 | if (r < 0 && r != -ESRCH) { |
4443 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4444 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 4445 | |
b821a397 | 4446 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 4447 | } else { |
bc6aed7b LP |
4448 | if (!main_pid_alien) |
4449 | wait_for_exit = true; | |
82659fd7 | 4450 | |
1d98fef1 | 4451 | if (r != -ESRCH && send_sighup) |
d0667321 | 4452 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 4453 | } |
cd2086fe LP |
4454 | } |
4455 | ||
4456 | if (control_pid > 0) { | |
1d98fef1 LP |
4457 | if (log_func) |
4458 | log_func(control_pid, sig, u); | |
cd2086fe | 4459 | |
1d98fef1 | 4460 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4461 | if (r < 0 && r != -ESRCH) { |
4462 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4463 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 4464 | |
b821a397 | 4465 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 4466 | } else { |
cd2086fe | 4467 | wait_for_exit = true; |
82659fd7 | 4468 | |
1d98fef1 | 4469 | if (r != -ESRCH && send_sighup) |
d0667321 | 4470 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 4471 | } |
cd2086fe LP |
4472 | } |
4473 | ||
b821a397 LP |
4474 | if (u->cgroup_path && |
4475 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4476 | _cleanup_set_free_ Set *pid_set = NULL; |
4477 | ||
82659fd7 LP |
4478 | /* Exclude the main/control pids from being killed via the cgroup */ |
4479 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4480 | if (!pid_set) |
4481 | return -ENOMEM; | |
4482 | ||
1d98fef1 LP |
4483 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4484 | sig, | |
4485 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4486 | pid_set, | |
4487 | log_func, u); | |
cd2086fe | 4488 | if (r < 0) { |
4c701096 | 4489 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
b821a397 LP |
4490 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
4491 | ||
82659fd7 | 4492 | } else if (r > 0) { |
bc6aed7b | 4493 | |
1d9cc876 LP |
4494 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4495 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
4496 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
4497 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
4498 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
4499 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 4500 | |
c22800e4 | 4501 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 4502 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 4503 | wait_for_exit = true; |
58ea275a | 4504 | |
1d98fef1 | 4505 | if (send_sighup) { |
82659fd7 LP |
4506 | set_free(pid_set); |
4507 | ||
4508 | pid_set = unit_pid_set(main_pid, control_pid); | |
4509 | if (!pid_set) | |
4510 | return -ENOMEM; | |
4511 | ||
1d98fef1 LP |
4512 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4513 | SIGHUP, | |
4514 | CGROUP_IGNORE_SELF, | |
4515 | pid_set, | |
4516 | NULL, NULL); | |
82659fd7 LP |
4517 | } |
4518 | } | |
cd2086fe LP |
4519 | } |
4520 | ||
4521 | return wait_for_exit; | |
4522 | } | |
4523 | ||
eef85c4a | 4524 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
ca8700e9 ZJS |
4525 | _cleanup_free_ char *p = NULL; |
4526 | char *prefix; | |
eef85c4a | 4527 | UnitDependencyInfo di; |
a57f7e2c LP |
4528 | int r; |
4529 | ||
4530 | assert(u); | |
4531 | assert(path); | |
4532 | ||
eef85c4a LP |
4533 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in |
4534 | * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to | |
4535 | * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily | |
4536 | * determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4537 | |
70b64bd3 ZJS |
4538 | if (!path_is_absolute(path)) |
4539 | return -EINVAL; | |
4540 | ||
548f6937 | 4541 | r = hashmap_ensure_allocated(&u->requires_mounts_for, &path_hash_ops); |
eef85c4a LP |
4542 | if (r < 0) |
4543 | return r; | |
4544 | ||
a57f7e2c LP |
4545 | p = strdup(path); |
4546 | if (!p) | |
4547 | return -ENOMEM; | |
4548 | ||
ca8700e9 | 4549 | path = path_kill_slashes(p); |
a57f7e2c | 4550 | |
ca8700e9 | 4551 | if (!path_is_normalized(path)) |
a57f7e2c | 4552 | return -EPERM; |
a57f7e2c | 4553 | |
ca8700e9 | 4554 | if (hashmap_contains(u->requires_mounts_for, path)) |
a57f7e2c | 4555 | return 0; |
a57f7e2c | 4556 | |
eef85c4a LP |
4557 | di = (UnitDependencyInfo) { |
4558 | .origin_mask = mask | |
4559 | }; | |
4560 | ||
ca8700e9 ZJS |
4561 | r = hashmap_put(u->requires_mounts_for, path, di.data); |
4562 | if (r < 0) | |
a57f7e2c | 4563 | return r; |
ca8700e9 | 4564 | p = NULL; |
a57f7e2c | 4565 | |
ca8700e9 ZJS |
4566 | prefix = alloca(strlen(path) + 1); |
4567 | PATH_FOREACH_PREFIX_MORE(prefix, path) { | |
a57f7e2c LP |
4568 | Set *x; |
4569 | ||
4570 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4571 | if (!x) { | |
ca8700e9 | 4572 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 4573 | |
548f6937 | 4574 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
742f41ad LP |
4575 | if (r < 0) |
4576 | return r; | |
a57f7e2c LP |
4577 | |
4578 | q = strdup(prefix); | |
4579 | if (!q) | |
4580 | return -ENOMEM; | |
4581 | ||
d5099efc | 4582 | x = set_new(NULL); |
ca8700e9 | 4583 | if (!x) |
a57f7e2c | 4584 | return -ENOMEM; |
a57f7e2c LP |
4585 | |
4586 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4587 | if (r < 0) { | |
a57f7e2c LP |
4588 | set_free(x); |
4589 | return r; | |
4590 | } | |
ca8700e9 | 4591 | q = NULL; |
a57f7e2c LP |
4592 | } |
4593 | ||
4594 | r = set_put(x, u); | |
4595 | if (r < 0) | |
4596 | return r; | |
4597 | } | |
4598 | ||
4599 | return 0; | |
4600 | } | |
4601 | ||
613b411c LP |
4602 | int unit_setup_exec_runtime(Unit *u) { |
4603 | ExecRuntime **rt; | |
4604 | size_t offset; | |
613b411c | 4605 | Unit *other; |
eef85c4a LP |
4606 | Iterator i; |
4607 | void *v; | |
e8a565cb | 4608 | int r; |
613b411c LP |
4609 | |
4610 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4611 | assert(offset > 0); | |
4612 | ||
06b643e7 | 4613 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
4614 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
4615 | if (*rt) | |
4616 | return 0; | |
4617 | ||
4618 | /* Try to get it from somebody else */ | |
eef85c4a | 4619 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { |
e8a565cb YW |
4620 | r = exec_runtime_acquire(u->manager, NULL, other->id, false, rt); |
4621 | if (r == 1) | |
4622 | return 1; | |
613b411c LP |
4623 | } |
4624 | ||
e8a565cb | 4625 | return exec_runtime_acquire(u->manager, unit_get_exec_context(u), u->id, true, rt); |
613b411c LP |
4626 | } |
4627 | ||
29206d46 LP |
4628 | int unit_setup_dynamic_creds(Unit *u) { |
4629 | ExecContext *ec; | |
4630 | DynamicCreds *dcreds; | |
4631 | size_t offset; | |
4632 | ||
4633 | assert(u); | |
4634 | ||
4635 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
4636 | assert(offset > 0); | |
4637 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
4638 | ||
4639 | ec = unit_get_exec_context(u); | |
4640 | assert(ec); | |
4641 | ||
4642 | if (!ec->dynamic_user) | |
4643 | return 0; | |
4644 | ||
4645 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
4646 | } | |
4647 | ||
1c2e9646 LP |
4648 | bool unit_type_supported(UnitType t) { |
4649 | if (_unlikely_(t < 0)) | |
4650 | return false; | |
4651 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
4652 | return false; | |
4653 | ||
4654 | if (!unit_vtable[t]->supported) | |
4655 | return true; | |
4656 | ||
4657 | return unit_vtable[t]->supported(); | |
4658 | } | |
4659 | ||
8b4305c7 LP |
4660 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
4661 | int r; | |
4662 | ||
4663 | assert(u); | |
4664 | assert(where); | |
4665 | ||
4666 | r = dir_is_empty(where); | |
3f602115 | 4667 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
4668 | return; |
4669 | if (r < 0) { | |
4670 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
4671 | return; | |
4672 | } | |
4673 | ||
4674 | log_struct(LOG_NOTICE, | |
2b044526 | 4675 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4676 | LOG_UNIT_ID(u), |
f1c50bec | 4677 | LOG_UNIT_INVOCATION_ID(u), |
8b4305c7 LP |
4678 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), |
4679 | "WHERE=%s", where, | |
4680 | NULL); | |
4681 | } | |
4682 | ||
25cd4964 AJ |
4683 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
4684 | _cleanup_free_ char *canonical_where; | |
8b4305c7 LP |
4685 | int r; |
4686 | ||
4687 | assert(u); | |
4688 | assert(where); | |
4689 | ||
25cd4964 | 4690 | r = chase_symlinks(where, NULL, CHASE_NONEXISTENT, &canonical_where); |
8b4305c7 | 4691 | if (r < 0) { |
25cd4964 | 4692 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
4693 | return 0; |
4694 | } | |
25cd4964 AJ |
4695 | |
4696 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
4697 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
4698 | return 0; |
4699 | ||
25cd4964 | 4700 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
8b4305c7 | 4701 | log_struct(LOG_ERR, |
2b044526 | 4702 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4703 | LOG_UNIT_ID(u), |
f1c50bec | 4704 | LOG_UNIT_INVOCATION_ID(u), |
25cd4964 | 4705 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), |
8b4305c7 LP |
4706 | "WHERE=%s", where, |
4707 | NULL); | |
4708 | ||
4709 | return -ELOOP; | |
4710 | } | |
0f13f3bd LP |
4711 | |
4712 | bool unit_is_pristine(Unit *u) { | |
4713 | assert(u); | |
4714 | ||
7c65093a | 4715 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
4716 | * in a number of different ways. Note that to cater for unit |
4717 | * types such as slice, we are generally fine with units that | |
61233823 | 4718 | * are marked UNIT_LOADED even though nothing was |
0f13f3bd LP |
4719 | * actually loaded, as those unit types don't require a file |
4720 | * on disk to validly load. */ | |
4721 | ||
4722 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
4723 | u->fragment_path || | |
4724 | u->source_path || | |
4725 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
4726 | u->job || |
4727 | u->merged_into); | |
4728 | } | |
291d565a LP |
4729 | |
4730 | pid_t unit_control_pid(Unit *u) { | |
4731 | assert(u); | |
4732 | ||
4733 | if (UNIT_VTABLE(u)->control_pid) | |
4734 | return UNIT_VTABLE(u)->control_pid(u); | |
4735 | ||
4736 | return 0; | |
4737 | } | |
4738 | ||
4739 | pid_t unit_main_pid(Unit *u) { | |
4740 | assert(u); | |
4741 | ||
4742 | if (UNIT_VTABLE(u)->main_pid) | |
4743 | return UNIT_VTABLE(u)->main_pid(u); | |
4744 | ||
4745 | return 0; | |
4746 | } | |
00d9ef85 LP |
4747 | |
4748 | static void unit_unref_uid_internal( | |
4749 | Unit *u, | |
4750 | uid_t *ref_uid, | |
4751 | bool destroy_now, | |
4752 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
4753 | ||
4754 | assert(u); | |
4755 | assert(ref_uid); | |
4756 | assert(_manager_unref_uid); | |
4757 | ||
4758 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
4759 | * gid_t are actually the same time, with the same validity rules. | |
4760 | * | |
4761 | * Drops a reference to UID/GID from a unit. */ | |
4762 | ||
4763 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4764 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4765 | ||
4766 | if (!uid_is_valid(*ref_uid)) | |
4767 | return; | |
4768 | ||
4769 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
4770 | *ref_uid = UID_INVALID; | |
4771 | } | |
4772 | ||
4773 | void unit_unref_uid(Unit *u, bool destroy_now) { | |
4774 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); | |
4775 | } | |
4776 | ||
4777 | void unit_unref_gid(Unit *u, bool destroy_now) { | |
4778 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); | |
4779 | } | |
4780 | ||
4781 | static int unit_ref_uid_internal( | |
4782 | Unit *u, | |
4783 | uid_t *ref_uid, | |
4784 | uid_t uid, | |
4785 | bool clean_ipc, | |
4786 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
4787 | ||
4788 | int r; | |
4789 | ||
4790 | assert(u); | |
4791 | assert(ref_uid); | |
4792 | assert(uid_is_valid(uid)); | |
4793 | assert(_manager_ref_uid); | |
4794 | ||
4795 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
4796 | * are actually the same type, and have the same validity rules. | |
4797 | * | |
4798 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
4799 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
4800 | * drops to zero. */ | |
4801 | ||
4802 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4803 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4804 | ||
4805 | if (*ref_uid == uid) | |
4806 | return 0; | |
4807 | ||
4808 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
4809 | return -EBUSY; | |
4810 | ||
4811 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
4812 | if (r < 0) | |
4813 | return r; | |
4814 | ||
4815 | *ref_uid = uid; | |
4816 | return 1; | |
4817 | } | |
4818 | ||
4819 | int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { | |
4820 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); | |
4821 | } | |
4822 | ||
4823 | int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { | |
4824 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); | |
4825 | } | |
4826 | ||
4827 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
4828 | int r = 0, q = 0; | |
4829 | ||
4830 | assert(u); | |
4831 | ||
4832 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
4833 | ||
4834 | if (uid_is_valid(uid)) { | |
4835 | r = unit_ref_uid(u, uid, clean_ipc); | |
4836 | if (r < 0) | |
4837 | return r; | |
4838 | } | |
4839 | ||
4840 | if (gid_is_valid(gid)) { | |
4841 | q = unit_ref_gid(u, gid, clean_ipc); | |
4842 | if (q < 0) { | |
4843 | if (r > 0) | |
4844 | unit_unref_uid(u, false); | |
4845 | ||
4846 | return q; | |
4847 | } | |
4848 | } | |
4849 | ||
4850 | return r > 0 || q > 0; | |
4851 | } | |
4852 | ||
4853 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
4854 | ExecContext *c; | |
4855 | int r; | |
4856 | ||
4857 | assert(u); | |
4858 | ||
4859 | c = unit_get_exec_context(u); | |
4860 | ||
4861 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
4862 | if (r < 0) | |
4863 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
4864 | ||
4865 | return r; | |
4866 | } | |
4867 | ||
4868 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { | |
4869 | assert(u); | |
4870 | ||
4871 | unit_unref_uid(u, destroy_now); | |
4872 | unit_unref_gid(u, destroy_now); | |
4873 | } | |
4874 | ||
4875 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { | |
4876 | int r; | |
4877 | ||
4878 | assert(u); | |
4879 | ||
4880 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
4881 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
4882 | * objects when no service references the UID/GID anymore. */ | |
4883 | ||
4884 | r = unit_ref_uid_gid(u, uid, gid); | |
4885 | if (r > 0) | |
4886 | bus_unit_send_change_signal(u); | |
4887 | } | |
4b58153d LP |
4888 | |
4889 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { | |
4890 | int r; | |
4891 | ||
4892 | assert(u); | |
4893 | ||
4894 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
4895 | ||
4896 | if (sd_id128_equal(u->invocation_id, id)) | |
4897 | return 0; | |
4898 | ||
4899 | if (!sd_id128_is_null(u->invocation_id)) | |
4900 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
4901 | ||
4902 | if (sd_id128_is_null(id)) { | |
4903 | r = 0; | |
4904 | goto reset; | |
4905 | } | |
4906 | ||
4907 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
4908 | if (r < 0) | |
4909 | goto reset; | |
4910 | ||
4911 | u->invocation_id = id; | |
4912 | sd_id128_to_string(id, u->invocation_id_string); | |
4913 | ||
4914 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
4915 | if (r < 0) | |
4916 | goto reset; | |
4917 | ||
4918 | return 0; | |
4919 | ||
4920 | reset: | |
4921 | u->invocation_id = SD_ID128_NULL; | |
4922 | u->invocation_id_string[0] = 0; | |
4923 | return r; | |
4924 | } | |
4925 | ||
4926 | int unit_acquire_invocation_id(Unit *u) { | |
4927 | sd_id128_t id; | |
4928 | int r; | |
4929 | ||
4930 | assert(u); | |
4931 | ||
4932 | r = sd_id128_randomize(&id); | |
4933 | if (r < 0) | |
4934 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
4935 | ||
4936 | r = unit_set_invocation_id(u, id); | |
4937 | if (r < 0) | |
4938 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
4939 | ||
4940 | return 0; | |
4941 | } | |
f0d47797 | 4942 | |
7960b0c7 LP |
4943 | void unit_set_exec_params(Unit *u, ExecParameters *p) { |
4944 | assert(u); | |
4945 | assert(p); | |
f0d47797 | 4946 | |
004c7f16 LP |
4947 | /* Copy parameters from manager */ |
4948 | p->environment = u->manager->environment; | |
4949 | p->confirm_spawn = manager_get_confirm_spawn(u->manager); | |
4950 | p->cgroup_supported = u->manager->cgroup_supported; | |
4951 | p->prefix = u->manager->prefix; | |
4952 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
4953 | ||
4954 | /* Copy paramaters from unit */ | |
7960b0c7 | 4955 | p->cgroup_path = u->cgroup_path; |
1d9cc876 | 4956 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
f0d47797 | 4957 | } |
a79279c7 | 4958 | |
4c253ed1 | 4959 | int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) { |
a79279c7 LP |
4960 | int r; |
4961 | ||
4962 | assert(u); | |
4963 | assert(ret); | |
4964 | ||
4965 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
4966 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
4967 | ||
4968 | (void) unit_realize_cgroup(u); | |
4969 | ||
4c253ed1 LP |
4970 | r = safe_fork(name, FORK_REOPEN_LOG, ret); |
4971 | if (r != 0) | |
4972 | return r; | |
a79279c7 | 4973 | |
4c253ed1 LP |
4974 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); |
4975 | (void) ignore_signals(SIGPIPE, -1); | |
a79279c7 | 4976 | |
4c253ed1 | 4977 | (void) prctl(PR_SET_PDEATHSIG, SIGTERM); |
a79279c7 | 4978 | |
4c253ed1 LP |
4979 | if (u->cgroup_path) { |
4980 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
4981 | if (r < 0) { | |
4982 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", u->cgroup_path); | |
4983 | _exit(EXIT_CGROUP); | |
a79279c7 | 4984 | } |
a79279c7 LP |
4985 | } |
4986 | ||
4c253ed1 | 4987 | return 0; |
a79279c7 | 4988 | } |
c999cf38 LP |
4989 | |
4990 | static void unit_update_dependency_mask(Unit *u, UnitDependency d, Unit *other, UnitDependencyInfo di) { | |
4991 | assert(u); | |
4992 | assert(d >= 0); | |
4993 | assert(d < _UNIT_DEPENDENCY_MAX); | |
4994 | assert(other); | |
4995 | ||
4996 | if (di.origin_mask == 0 && di.destination_mask == 0) { | |
4997 | /* No bit set anymore, let's drop the whole entry */ | |
4998 | assert_se(hashmap_remove(u->dependencies[d], other)); | |
4999 | log_unit_debug(u, "%s lost dependency %s=%s", u->id, unit_dependency_to_string(d), other->id); | |
5000 | } else | |
5001 | /* Mask was reduced, let's update the entry */ | |
5002 | assert_se(hashmap_update(u->dependencies[d], other, di.data) == 0); | |
5003 | } | |
5004 | ||
5005 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
5006 | UnitDependency d; | |
5007 | ||
5008 | assert(u); | |
5009 | ||
5010 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5011 | ||
5012 | if (mask == 0) | |
5013 | return; | |
5014 | ||
5015 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
5016 | bool done; | |
5017 | ||
5018 | do { | |
5019 | UnitDependencyInfo di; | |
5020 | Unit *other; | |
5021 | Iterator i; | |
5022 | ||
5023 | done = true; | |
5024 | ||
5025 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { | |
5026 | UnitDependency q; | |
5027 | ||
5028 | if ((di.origin_mask & ~mask) == di.origin_mask) | |
5029 | continue; | |
5030 | di.origin_mask &= ~mask; | |
5031 | unit_update_dependency_mask(u, d, other, di); | |
5032 | ||
5033 | /* We updated the dependency from our unit to the other unit now. But most dependencies | |
5034 | * imply a reverse dependency. Hence, let's delete that one too. For that we go through | |
5035 | * all dependency types on the other unit and delete all those which point to us and | |
5036 | * have the right mask set. */ | |
5037 | ||
5038 | for (q = 0; q < _UNIT_DEPENDENCY_MAX; q++) { | |
5039 | UnitDependencyInfo dj; | |
5040 | ||
5041 | dj.data = hashmap_get(other->dependencies[q], u); | |
5042 | if ((dj.destination_mask & ~mask) == dj.destination_mask) | |
5043 | continue; | |
5044 | dj.destination_mask &= ~mask; | |
5045 | ||
5046 | unit_update_dependency_mask(other, q, u, dj); | |
5047 | } | |
5048 | ||
5049 | unit_add_to_gc_queue(other); | |
5050 | ||
5051 | done = false; | |
5052 | break; | |
5053 | } | |
5054 | ||
5055 | } while (!done); | |
5056 | } | |
5057 | } | |
d3070fbd LP |
5058 | |
5059 | static int unit_export_invocation_id(Unit *u) { | |
5060 | const char *p; | |
5061 | int r; | |
5062 | ||
5063 | assert(u); | |
5064 | ||
5065 | if (u->exported_invocation_id) | |
5066 | return 0; | |
5067 | ||
5068 | if (sd_id128_is_null(u->invocation_id)) | |
5069 | return 0; | |
5070 | ||
5071 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
5072 | r = symlink_atomic(u->invocation_id_string, p); | |
5073 | if (r < 0) | |
5074 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5075 | ||
5076 | u->exported_invocation_id = true; | |
5077 | return 0; | |
5078 | } | |
5079 | ||
5080 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5081 | const char *p; | |
5082 | char buf[2]; | |
5083 | int r; | |
5084 | ||
5085 | assert(u); | |
5086 | assert(c); | |
5087 | ||
5088 | if (u->exported_log_level_max) | |
5089 | return 0; | |
5090 | ||
5091 | if (c->log_level_max < 0) | |
5092 | return 0; | |
5093 | ||
5094 | assert(c->log_level_max <= 7); | |
5095 | ||
5096 | buf[0] = '0' + c->log_level_max; | |
5097 | buf[1] = 0; | |
5098 | ||
5099 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5100 | r = symlink_atomic(buf, p); | |
5101 | if (r < 0) | |
5102 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5103 | ||
5104 | u->exported_log_level_max = true; | |
5105 | return 0; | |
5106 | } | |
5107 | ||
5108 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5109 | _cleanup_close_ int fd = -1; | |
5110 | struct iovec *iovec; | |
5111 | const char *p; | |
5112 | char *pattern; | |
5113 | le64_t *sizes; | |
5114 | ssize_t n; | |
5115 | size_t i; | |
5116 | int r; | |
5117 | ||
5118 | if (u->exported_log_extra_fields) | |
5119 | return 0; | |
5120 | ||
5121 | if (c->n_log_extra_fields <= 0) | |
5122 | return 0; | |
5123 | ||
5124 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5125 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5126 | ||
5127 | for (i = 0; i < c->n_log_extra_fields; i++) { | |
5128 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); | |
5129 | ||
5130 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5131 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5132 | } | |
5133 | ||
5134 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5135 | pattern = strjoina(p, ".XXXXXX"); | |
5136 | ||
5137 | fd = mkostemp_safe(pattern); | |
5138 | if (fd < 0) | |
5139 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5140 | ||
5141 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5142 | if (n < 0) { | |
5143 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5144 | goto fail; | |
5145 | } | |
5146 | ||
5147 | (void) fchmod(fd, 0644); | |
5148 | ||
5149 | if (rename(pattern, p) < 0) { | |
5150 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5151 | goto fail; | |
5152 | } | |
5153 | ||
5154 | u->exported_log_extra_fields = true; | |
5155 | return 0; | |
5156 | ||
5157 | fail: | |
5158 | (void) unlink(pattern); | |
5159 | return r; | |
5160 | } | |
5161 | ||
5162 | void unit_export_state_files(Unit *u) { | |
5163 | const ExecContext *c; | |
5164 | ||
5165 | assert(u); | |
5166 | ||
5167 | if (!u->id) | |
5168 | return; | |
5169 | ||
5170 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5171 | return; | |
5172 | ||
5173 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data | |
5174 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5175 | * the IPC system itself and PID 1 also log to the journal. | |
5176 | * | |
5177 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5178 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5179 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5180 | * namespace at least. | |
5181 | * | |
5182 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5183 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5184 | * them with one. */ | |
5185 | ||
5186 | (void) unit_export_invocation_id(u); | |
5187 | ||
5188 | c = unit_get_exec_context(u); | |
5189 | if (c) { | |
5190 | (void) unit_export_log_level_max(u, c); | |
5191 | (void) unit_export_log_extra_fields(u, c); | |
5192 | } | |
5193 | } | |
5194 | ||
5195 | void unit_unlink_state_files(Unit *u) { | |
5196 | const char *p; | |
5197 | ||
5198 | assert(u); | |
5199 | ||
5200 | if (!u->id) | |
5201 | return; | |
5202 | ||
5203 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5204 | return; | |
5205 | ||
5206 | /* Undoes the effect of unit_export_state() */ | |
5207 | ||
5208 | if (u->exported_invocation_id) { | |
5209 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
5210 | (void) unlink(p); | |
5211 | ||
5212 | u->exported_invocation_id = false; | |
5213 | } | |
5214 | ||
5215 | if (u->exported_log_level_max) { | |
5216 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5217 | (void) unlink(p); | |
5218 | ||
5219 | u->exported_log_level_max = false; | |
5220 | } | |
5221 | ||
5222 | if (u->exported_log_extra_fields) { | |
5223 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5224 | (void) unlink(p); | |
5225 | ||
5226 | u->exported_log_extra_fields = false; | |
5227 | } | |
5228 | } | |
5afe510c | 5229 | |
3c7416b6 LP |
5230 | int unit_prepare_exec(Unit *u) { |
5231 | int r; | |
5232 | ||
5233 | assert(u); | |
5234 | ||
5235 | /* Prepares everything so that we can fork of a process for this unit */ | |
5236 | ||
5237 | (void) unit_realize_cgroup(u); | |
5238 | ||
5239 | if (u->reset_accounting) { | |
5240 | (void) unit_reset_cpu_accounting(u); | |
5241 | (void) unit_reset_ip_accounting(u); | |
5242 | u->reset_accounting = false; | |
5243 | } | |
5244 | ||
5245 | unit_export_state_files(u); | |
5246 | ||
5247 | r = unit_setup_exec_runtime(u); | |
5248 | if (r < 0) | |
5249 | return r; | |
5250 | ||
5251 | r = unit_setup_dynamic_creds(u); | |
5252 | if (r < 0) | |
5253 | return r; | |
5254 | ||
5255 | return 0; | |
5256 | } | |
5257 | ||
a4634b21 LP |
5258 | static void log_leftover(pid_t pid, int sig, void *userdata) { |
5259 | _cleanup_free_ char *comm = NULL; | |
5260 | ||
5261 | (void) get_process_comm(pid, &comm); | |
5262 | ||
5263 | if (comm && comm[0] == '(') /* Most likely our own helper process (PAM?), ignore */ | |
5264 | return; | |
5265 | ||
5266 | log_unit_warning(userdata, | |
5267 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5268 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5269 | pid, strna(comm)); | |
5270 | } | |
5271 | ||
5272 | void unit_warn_leftover_processes(Unit *u) { | |
5273 | assert(u); | |
5274 | ||
5275 | (void) unit_pick_cgroup_path(u); | |
5276 | ||
5277 | if (!u->cgroup_path) | |
5278 | return; | |
5279 | ||
5280 | (void) cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_leftover, u); | |
5281 | } | |
5282 | ||
bb2c7685 LP |
5283 | bool unit_needs_console(Unit *u) { |
5284 | ExecContext *ec; | |
5285 | UnitActiveState state; | |
5286 | ||
5287 | assert(u); | |
5288 | ||
5289 | state = unit_active_state(u); | |
5290 | ||
5291 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5292 | return false; | |
5293 | ||
5294 | if (UNIT_VTABLE(u)->needs_console) | |
5295 | return UNIT_VTABLE(u)->needs_console(u); | |
5296 | ||
5297 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5298 | ec = unit_get_exec_context(u); | |
5299 | if (!ec) | |
5300 | return false; | |
5301 | ||
5302 | return exec_context_may_touch_console(ec); | |
5303 | } | |
5304 | ||
81e9871e LP |
5305 | const char *unit_label_path(Unit *u) { |
5306 | const char *p; | |
5307 | ||
5308 | /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off | |
5309 | * when validating access checks. */ | |
5310 | ||
5311 | p = u->source_path ?: u->fragment_path; | |
5312 | if (!p) | |
5313 | return NULL; | |
5314 | ||
5315 | /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */ | |
5316 | if (path_equal(p, "/dev/null")) | |
5317 | return NULL; | |
5318 | ||
5319 | return p; | |
5320 | } | |
5321 | ||
6592b975 LP |
5322 | int unit_pid_attachable(Unit *u, pid_t pid, sd_bus_error *error) { |
5323 | int r; | |
5324 | ||
5325 | assert(u); | |
5326 | ||
5327 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5328 | * and not a kernel thread either */ | |
5329 | ||
5330 | /* First, a simple range check */ | |
5331 | if (!pid_is_valid(pid)) | |
5332 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier " PID_FMT " is not valid.", pid); | |
5333 | ||
5334 | /* Some extra safety check */ | |
5335 | if (pid == 1 || pid == getpid_cached()) | |
5336 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager processs, refusing.", pid); | |
5337 | ||
5338 | /* Don't even begin to bother with kernel threads */ | |
5339 | r = is_kernel_thread(pid); | |
5340 | if (r == -ESRCH) | |
5341 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid); | |
5342 | if (r < 0) | |
5343 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid); | |
5344 | if (r > 0) | |
5345 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid); | |
5346 | ||
5347 | return 0; | |
5348 | } | |
5349 | ||
5afe510c LP |
5350 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
5351 | [COLLECT_INACTIVE] = "inactive", | |
5352 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
5353 | }; | |
5354 | ||
5355 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); |