]>
Commit | Line | Data |
---|---|---|
53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a7334b09 | 2 | |
87f0e418 | 3 | #include <errno.h> |
0301abf4 | 4 | #include <stdlib.h> |
4f5dd394 | 5 | #include <string.h> |
4c253ed1 | 6 | #include <sys/prctl.h> |
45fb0699 | 7 | #include <sys/stat.h> |
4f5dd394 | 8 | #include <unistd.h> |
87f0e418 | 9 | |
718db961 LP |
10 | #include "sd-id128.h" |
11 | #include "sd-messages.h" | |
4f5dd394 | 12 | |
57b7a260 | 13 | #include "all-units.h" |
d68c645b | 14 | #include "alloc-util.h" |
4f5dd394 LP |
15 | #include "bus-common-errors.h" |
16 | #include "bus-util.h" | |
c6c18be3 | 17 | #include "cgroup-util.h" |
4f5dd394 LP |
18 | #include "dbus-unit.h" |
19 | #include "dbus.h" | |
20 | #include "dropin.h" | |
21 | #include "escape.h" | |
22 | #include "execute.h" | |
6a48d82f | 23 | #include "fd-util.h" |
a5c32cff | 24 | #include "fileio-label.h" |
ee228be1 | 25 | #include "fileio.h" |
f97b34a6 | 26 | #include "format-util.h" |
d3070fbd | 27 | #include "fs-util.h" |
4b58153d | 28 | #include "id128-util.h" |
915b1d01 | 29 | #include "io-util.h" |
4f5dd394 LP |
30 | #include "load-dropin.h" |
31 | #include "load-fragment.h" | |
32 | #include "log.h" | |
33 | #include "macro.h" | |
34 | #include "missing.h" | |
35 | #include "mkdir.h" | |
6bedfcbb | 36 | #include "parse-util.h" |
4f5dd394 | 37 | #include "path-util.h" |
0b452006 | 38 | #include "process-util.h" |
d68c645b | 39 | #include "serialize.h" |
4f5dd394 | 40 | #include "set.h" |
6eb7c172 | 41 | #include "signal-util.h" |
d3070fbd | 42 | #include "sparse-endian.h" |
e9db43d5 | 43 | #include "special.h" |
2e59b241 | 44 | #include "specifier.h" |
8fcde012 | 45 | #include "stat-util.h" |
d054f0a4 | 46 | #include "stdio-util.h" |
5afe510c | 47 | #include "string-table.h" |
07630cea | 48 | #include "string-util.h" |
4f5dd394 | 49 | #include "strv.h" |
5b262f74 | 50 | #include "terminal-util.h" |
e4de7287 | 51 | #include "tmpfile-util.h" |
4f4afc88 | 52 | #include "umask-util.h" |
4f5dd394 | 53 | #include "unit-name.h" |
e9db43d5 | 54 | #include "unit.h" |
b1d4f8e1 LP |
55 | #include "user-util.h" |
56 | #include "virt.h" | |
87f0e418 LP |
57 | |
58 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
59 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 LP |
60 | [UNIT_SOCKET] = &socket_vtable, |
61 | [UNIT_TARGET] = &target_vtable, | |
62 | [UNIT_DEVICE] = &device_vtable, | |
63 | [UNIT_MOUNT] = &mount_vtable, | |
64 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 65 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 66 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 67 | [UNIT_PATH] = &path_vtable, |
6c12b52e | 68 | [UNIT_SLICE] = &slice_vtable, |
5afe510c | 69 | [UNIT_SCOPE] = &scope_vtable, |
87f0e418 LP |
70 | }; |
71 | ||
f2341e0a | 72 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 73 | |
7d17cfbc | 74 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
75 | Unit *u; |
76 | ||
77 | assert(m); | |
ac155bb8 | 78 | assert(size >= sizeof(Unit)); |
87f0e418 | 79 | |
7d17cfbc MS |
80 | u = malloc0(size); |
81 | if (!u) | |
87f0e418 LP |
82 | return NULL; |
83 | ||
d5099efc | 84 | u->names = set_new(&string_hash_ops); |
6b430fdb ZJS |
85 | if (!u->names) |
86 | return mfree(u); | |
87f0e418 | 87 | |
ac155bb8 MS |
88 | u->manager = m; |
89 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
90 | u->default_dependencies = true; |
91 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 92 | u->unit_file_preset = -1; |
d420282b | 93 | u->on_failure_job_mode = JOB_REPLACE; |
0bb814c2 | 94 | u->cgroup_control_inotify_wd = -1; |
afcfaa69 | 95 | u->cgroup_memory_inotify_wd = -1; |
36c16a7c | 96 | u->job_timeout = USEC_INFINITY; |
a2df3ea4 | 97 | u->job_running_timeout = USEC_INFINITY; |
00d9ef85 LP |
98 | u->ref_uid = UID_INVALID; |
99 | u->ref_gid = GID_INVALID; | |
fe700f46 | 100 | u->cpu_usage_last = NSEC_INFINITY; |
17f14955 | 101 | u->cgroup_invalidated_mask |= CGROUP_MASK_BPF_FIREWALL; |
7af67e9a | 102 | u->failure_action_exit_status = u->success_action_exit_status = -1; |
87f0e418 | 103 | |
6a48d82f DM |
104 | u->ip_accounting_ingress_map_fd = -1; |
105 | u->ip_accounting_egress_map_fd = -1; | |
106 | u->ipv4_allow_map_fd = -1; | |
107 | u->ipv6_allow_map_fd = -1; | |
108 | u->ipv4_deny_map_fd = -1; | |
109 | u->ipv6_deny_map_fd = -1; | |
110 | ||
2e59b241 LP |
111 | u->last_section_private = -1; |
112 | ||
6bf0f408 | 113 | RATELIMIT_INIT(u->start_limit, m->default_start_limit_interval, m->default_start_limit_burst); |
67bfdc97 | 114 | RATELIMIT_INIT(u->auto_stop_ratelimit, 10 * USEC_PER_SEC, 16); |
bea355da | 115 | |
fbe14fc9 LP |
116 | for (CGroupIOAccountingMetric i = 0; i < _CGROUP_IO_ACCOUNTING_METRIC_MAX; i++) |
117 | u->io_accounting_last[i] = UINT64_MAX; | |
118 | ||
87f0e418 LP |
119 | return u; |
120 | } | |
121 | ||
a581e45a | 122 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
dc409696 | 123 | _cleanup_(unit_freep) Unit *u = NULL; |
a581e45a LP |
124 | int r; |
125 | ||
126 | u = unit_new(m, size); | |
127 | if (!u) | |
128 | return -ENOMEM; | |
129 | ||
130 | r = unit_add_name(u, name); | |
dc409696 | 131 | if (r < 0) |
a581e45a | 132 | return r; |
a581e45a | 133 | |
1cc6c93a YW |
134 | *ret = TAKE_PTR(u); |
135 | ||
a581e45a LP |
136 | return r; |
137 | } | |
138 | ||
303ee601 | 139 | bool unit_has_name(const Unit *u, const char *name) { |
f278026d LP |
140 | assert(u); |
141 | assert(name); | |
142 | ||
390bc2b1 | 143 | return set_contains(u->names, (char*) name); |
f278026d LP |
144 | } |
145 | ||
598459ce LP |
146 | static void unit_init(Unit *u) { |
147 | CGroupContext *cc; | |
148 | ExecContext *ec; | |
149 | KillContext *kc; | |
150 | ||
151 | assert(u); | |
152 | assert(u->manager); | |
153 | assert(u->type >= 0); | |
154 | ||
155 | cc = unit_get_cgroup_context(u); | |
156 | if (cc) { | |
157 | cgroup_context_init(cc); | |
158 | ||
159 | /* Copy in the manager defaults into the cgroup | |
160 | * context, _before_ the rest of the settings have | |
161 | * been initialized */ | |
162 | ||
163 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
13c31542 | 164 | cc->io_accounting = u->manager->default_io_accounting; |
598459ce LP |
165 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
166 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 167 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
6a48d82f | 168 | cc->ip_accounting = u->manager->default_ip_accounting; |
0af20ea2 LP |
169 | |
170 | if (u->type != UNIT_SLICE) | |
171 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
172 | } |
173 | ||
174 | ec = unit_get_exec_context(u); | |
b1edf445 | 175 | if (ec) { |
598459ce LP |
176 | exec_context_init(ec); |
177 | ||
b1edf445 | 178 | ec->keyring_mode = MANAGER_IS_SYSTEM(u->manager) ? |
00f5ad93 | 179 | EXEC_KEYRING_SHARED : EXEC_KEYRING_INHERIT; |
b1edf445 LP |
180 | } |
181 | ||
598459ce LP |
182 | kc = unit_get_kill_context(u); |
183 | if (kc) | |
184 | kill_context_init(kc); | |
185 | ||
186 | if (UNIT_VTABLE(u)->init) | |
187 | UNIT_VTABLE(u)->init(u); | |
188 | } | |
189 | ||
87f0e418 | 190 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 191 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 192 | UnitType t; |
87f0e418 LP |
193 | int r; |
194 | ||
195 | assert(u); | |
196 | assert(text); | |
197 | ||
7410616c | 198 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 199 | |
ac155bb8 | 200 | if (!u->instance) |
9e2f7c11 | 201 | return -EINVAL; |
87f0e418 | 202 | |
7410616c LP |
203 | r = unit_name_replace_instance(text, u->instance, &s); |
204 | if (r < 0) | |
205 | return r; | |
206 | } else { | |
9e2f7c11 | 207 | s = strdup(text); |
7410616c LP |
208 | if (!s) |
209 | return -ENOMEM; | |
210 | } | |
87f0e418 | 211 | |
7410616c LP |
212 | if (set_contains(u->names, s)) |
213 | return 0; | |
214 | if (hashmap_contains(u->manager->units, s)) | |
215 | return -EEXIST; | |
216 | ||
217 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 218 | return -EINVAL; |
e537352b | 219 | |
7410616c LP |
220 | t = unit_name_to_type(s); |
221 | if (t < 0) | |
222 | return -EINVAL; | |
87f0e418 | 223 | |
598459ce LP |
224 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
225 | return -EINVAL; | |
87f0e418 | 226 | |
e48614c4 ZJS |
227 | r = unit_name_to_instance(s, &i); |
228 | if (r < 0) | |
598459ce | 229 | return r; |
87f0e418 | 230 | |
ce99c68a | 231 | if (i && !unit_type_may_template(t)) |
598459ce | 232 | return -EINVAL; |
9e2f7c11 | 233 | |
276c3e78 | 234 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
235 | * but not both. Note that we do allow names with different |
236 | * instance names however! */ | |
598459ce LP |
237 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
238 | return -EINVAL; | |
9e2f7c11 | 239 | |
8a993b61 | 240 | if (!unit_type_may_alias(t) && !set_isempty(u->names)) |
598459ce | 241 | return -EEXIST; |
9e2f7c11 | 242 | |
598459ce LP |
243 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
244 | return -E2BIG; | |
4f0f902f | 245 | |
e48614c4 | 246 | r = set_put(u->names, s); |
7410616c | 247 | if (r < 0) |
598459ce | 248 | return r; |
7410616c | 249 | assert(r > 0); |
87f0e418 | 250 | |
e48614c4 ZJS |
251 | r = hashmap_put(u->manager->units, s, u); |
252 | if (r < 0) { | |
7410616c | 253 | (void) set_remove(u->names, s); |
598459ce | 254 | return r; |
87f0e418 LP |
255 | } |
256 | ||
ac155bb8 | 257 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
258 | u->type = t; |
259 | u->id = s; | |
1cc6c93a | 260 | u->instance = TAKE_PTR(i); |
9e2f7c11 | 261 | |
71fda00f | 262 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 263 | |
598459ce | 264 | unit_init(u); |
598459ce | 265 | } |
9e2f7c11 | 266 | |
598459ce | 267 | s = NULL; |
9e2f7c11 | 268 | |
598459ce LP |
269 | unit_add_to_dbus_queue(u); |
270 | return 0; | |
87f0e418 LP |
271 | } |
272 | ||
0ae97ec1 | 273 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 274 | _cleanup_free_ char *t = NULL; |
598459ce | 275 | char *s, *i; |
276c3e78 | 276 | int r; |
0ae97ec1 LP |
277 | |
278 | assert(u); | |
279 | assert(name); | |
280 | ||
7410616c | 281 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 282 | |
ac155bb8 | 283 | if (!u->instance) |
9e2f7c11 LP |
284 | return -EINVAL; |
285 | ||
7410616c LP |
286 | r = unit_name_replace_instance(name, u->instance, &t); |
287 | if (r < 0) | |
288 | return r; | |
9e2f7c11 LP |
289 | |
290 | name = t; | |
291 | } | |
292 | ||
0ae97ec1 | 293 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 294 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 295 | if (!s) |
0ae97ec1 LP |
296 | return -ENOENT; |
297 | ||
7410616c | 298 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
299 | r = unit_name_to_instance(s, &i); |
300 | if (r < 0) | |
276c3e78 LP |
301 | return r; |
302 | ||
ac155bb8 | 303 | u->id = s; |
276c3e78 | 304 | |
ac155bb8 MS |
305 | free(u->instance); |
306 | u->instance = i; | |
276c3e78 | 307 | |
c1e1601e | 308 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 309 | |
0ae97ec1 LP |
310 | return 0; |
311 | } | |
312 | ||
f50e0a01 | 313 | int unit_set_description(Unit *u, const char *description) { |
84b26d51 | 314 | int r; |
f50e0a01 LP |
315 | |
316 | assert(u); | |
317 | ||
84b26d51 LP |
318 | r = free_and_strdup(&u->description, empty_to_null(description)); |
319 | if (r < 0) | |
320 | return r; | |
321 | if (r > 0) | |
322 | unit_add_to_dbus_queue(u); | |
c1e1601e | 323 | |
f50e0a01 LP |
324 | return 0; |
325 | } | |
326 | ||
f2f725e5 | 327 | bool unit_may_gc(Unit *u) { |
a354329f | 328 | UnitActiveState state; |
e98b2fbb | 329 | int r; |
5afe510c | 330 | |
701cc384 LP |
331 | assert(u); |
332 | ||
f2f725e5 ZJS |
333 | /* Checks whether the unit is ready to be unloaded for garbage collection. |
334 | * Returns true when the unit may be collected, and false if there's some | |
2641f02e ZJS |
335 | * reason to keep it loaded. |
336 | * | |
337 | * References from other units are *not* checked here. Instead, this is done | |
338 | * in unit_gc_sweep(), but using markers to properly collect dependency loops. | |
339 | */ | |
5afe510c | 340 | |
a354329f | 341 | if (u->job) |
f2f725e5 | 342 | return false; |
701cc384 | 343 | |
a354329f | 344 | if (u->nop_job) |
f2f725e5 | 345 | return false; |
6c073082 | 346 | |
a354329f LP |
347 | state = unit_active_state(u); |
348 | ||
7eb2a8a1 | 349 | /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */ |
a354329f LP |
350 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && |
351 | UNIT_VTABLE(u)->release_resources) | |
7eb2a8a1 | 352 | UNIT_VTABLE(u)->release_resources(u); |
a354329f | 353 | |
f5869324 | 354 | if (u->perpetual) |
f2f725e5 | 355 | return false; |
9d576438 | 356 | |
05a98afd | 357 | if (sd_bus_track_count(u->bus_track) > 0) |
f2f725e5 | 358 | return false; |
05a98afd | 359 | |
5afe510c LP |
360 | /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */ |
361 | switch (u->collect_mode) { | |
362 | ||
363 | case COLLECT_INACTIVE: | |
364 | if (state != UNIT_INACTIVE) | |
f2f725e5 | 365 | return false; |
5afe510c LP |
366 | |
367 | break; | |
368 | ||
369 | case COLLECT_INACTIVE_OR_FAILED: | |
370 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
f2f725e5 | 371 | return false; |
5afe510c LP |
372 | |
373 | break; | |
374 | ||
375 | default: | |
376 | assert_not_reached("Unknown garbage collection mode"); | |
377 | } | |
378 | ||
e98b2fbb LP |
379 | if (u->cgroup_path) { |
380 | /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay | |
381 | * around. Units with active processes should never be collected. */ | |
382 | ||
383 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
384 | if (r < 0) | |
385 | log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", u->cgroup_path); | |
386 | if (r <= 0) | |
f2f725e5 | 387 | return false; |
e98b2fbb LP |
388 | } |
389 | ||
f2f725e5 ZJS |
390 | if (UNIT_VTABLE(u)->may_gc && !UNIT_VTABLE(u)->may_gc(u)) |
391 | return false; | |
701cc384 | 392 | |
f2f725e5 | 393 | return true; |
701cc384 LP |
394 | } |
395 | ||
87f0e418 LP |
396 | void unit_add_to_load_queue(Unit *u) { |
397 | assert(u); | |
ac155bb8 | 398 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 399 | |
ac155bb8 | 400 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
401 | return; |
402 | ||
71fda00f | 403 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 404 | u->in_load_queue = true; |
87f0e418 LP |
405 | } |
406 | ||
23a177ef LP |
407 | void unit_add_to_cleanup_queue(Unit *u) { |
408 | assert(u); | |
409 | ||
ac155bb8 | 410 | if (u->in_cleanup_queue) |
23a177ef LP |
411 | return; |
412 | ||
71fda00f | 413 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 414 | u->in_cleanup_queue = true; |
23a177ef LP |
415 | } |
416 | ||
701cc384 LP |
417 | void unit_add_to_gc_queue(Unit *u) { |
418 | assert(u); | |
419 | ||
ac155bb8 | 420 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
421 | return; |
422 | ||
f2f725e5 | 423 | if (!unit_may_gc(u)) |
701cc384 LP |
424 | return; |
425 | ||
c5a97ed1 | 426 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 427 | u->in_gc_queue = true; |
701cc384 LP |
428 | } |
429 | ||
c1e1601e LP |
430 | void unit_add_to_dbus_queue(Unit *u) { |
431 | assert(u); | |
ac155bb8 | 432 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 433 | |
ac155bb8 | 434 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
435 | return; |
436 | ||
a567261a | 437 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 438 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 439 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 440 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 441 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
442 | return; |
443 | } | |
444 | ||
71fda00f | 445 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 446 | u->in_dbus_queue = true; |
c1e1601e LP |
447 | } |
448 | ||
fda09318 | 449 | void unit_submit_to_stop_when_unneeded_queue(Unit *u) { |
a3c1168a LP |
450 | assert(u); |
451 | ||
452 | if (u->in_stop_when_unneeded_queue) | |
453 | return; | |
454 | ||
455 | if (!u->stop_when_unneeded) | |
456 | return; | |
457 | ||
458 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
459 | return; | |
460 | ||
461 | LIST_PREPEND(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
462 | u->in_stop_when_unneeded_queue = true; | |
463 | } | |
464 | ||
eef85c4a | 465 | static void bidi_set_free(Unit *u, Hashmap *h) { |
87f0e418 | 466 | Unit *other; |
eef85c4a LP |
467 | Iterator i; |
468 | void *v; | |
87f0e418 LP |
469 | |
470 | assert(u); | |
471 | ||
eef85c4a | 472 | /* Frees the hashmap and makes sure we are dropped from the inverse pointers */ |
87f0e418 | 473 | |
eef85c4a | 474 | HASHMAP_FOREACH_KEY(v, other, h, i) { |
87f0e418 LP |
475 | UnitDependency d; |
476 | ||
477 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
eef85c4a | 478 | hashmap_remove(other->dependencies[d], u); |
701cc384 LP |
479 | |
480 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
481 | } |
482 | ||
eef85c4a | 483 | hashmap_free(h); |
87f0e418 LP |
484 | } |
485 | ||
c2756a68 LP |
486 | static void unit_remove_transient(Unit *u) { |
487 | char **i; | |
488 | ||
489 | assert(u); | |
490 | ||
491 | if (!u->transient) | |
492 | return; | |
493 | ||
494 | if (u->fragment_path) | |
3f5e8115 | 495 | (void) unlink(u->fragment_path); |
c2756a68 LP |
496 | |
497 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 498 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 499 | |
39591351 LP |
500 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
501 | if (!p) | |
502 | continue; | |
503 | ||
504 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
505 | if (!pp) | |
506 | continue; | |
507 | ||
508 | /* Only drop transient drop-ins */ | |
509 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
510 | continue; | |
c2756a68 | 511 | |
39591351 LP |
512 | (void) unlink(*i); |
513 | (void) rmdir(p); | |
c2756a68 LP |
514 | } |
515 | } | |
516 | ||
a57f7e2c | 517 | static void unit_free_requires_mounts_for(Unit *u) { |
eef85c4a | 518 | assert(u); |
a57f7e2c | 519 | |
eef85c4a LP |
520 | for (;;) { |
521 | _cleanup_free_ char *path; | |
a57f7e2c | 522 | |
eef85c4a LP |
523 | path = hashmap_steal_first_key(u->requires_mounts_for); |
524 | if (!path) | |
525 | break; | |
526 | else { | |
527 | char s[strlen(path) + 1]; | |
a57f7e2c | 528 | |
eef85c4a LP |
529 | PATH_FOREACH_PREFIX_MORE(s, path) { |
530 | char *y; | |
531 | Set *x; | |
532 | ||
533 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
534 | if (!x) | |
535 | continue; | |
a57f7e2c | 536 | |
eef85c4a | 537 | (void) set_remove(x, u); |
a57f7e2c | 538 | |
eef85c4a LP |
539 | if (set_isempty(x)) { |
540 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
541 | free(y); | |
542 | set_free(x); | |
543 | } | |
a57f7e2c LP |
544 | } |
545 | } | |
546 | } | |
547 | ||
eef85c4a | 548 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
a57f7e2c LP |
549 | } |
550 | ||
598459ce LP |
551 | static void unit_done(Unit *u) { |
552 | ExecContext *ec; | |
553 | CGroupContext *cc; | |
554 | ||
555 | assert(u); | |
556 | ||
557 | if (u->type < 0) | |
558 | return; | |
559 | ||
560 | if (UNIT_VTABLE(u)->done) | |
561 | UNIT_VTABLE(u)->done(u); | |
562 | ||
563 | ec = unit_get_exec_context(u); | |
564 | if (ec) | |
565 | exec_context_done(ec); | |
566 | ||
567 | cc = unit_get_cgroup_context(u); | |
568 | if (cc) | |
569 | cgroup_context_done(cc); | |
570 | } | |
571 | ||
87f0e418 LP |
572 | void unit_free(Unit *u) { |
573 | UnitDependency d; | |
574 | Iterator i; | |
575 | char *t; | |
576 | ||
c9d5c9c0 LP |
577 | if (!u) |
578 | return; | |
87f0e418 | 579 | |
b8b6f321 LP |
580 | if (UNIT_ISSET(u->slice)) { |
581 | /* A unit is being dropped from the tree, make sure our parent slice recalculates the member mask */ | |
582 | unit_invalidate_cgroup_members_masks(UNIT_DEREF(u->slice)); | |
583 | ||
584 | /* And make sure the parent is realized again, updating cgroup memberships */ | |
585 | unit_add_to_cgroup_realize_queue(UNIT_DEREF(u->slice)); | |
586 | } | |
587 | ||
50fb00b7 | 588 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 589 | |
2c289ea8 | 590 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
591 | unit_remove_transient(u); |
592 | ||
c1e1601e LP |
593 | bus_unit_send_removed_signal(u); |
594 | ||
598459ce | 595 | unit_done(u); |
a013b84b | 596 | |
50be4f4a | 597 | unit_dequeue_rewatch_pids(u); |
cf9fd508 | 598 | |
50be4f4a | 599 | sd_bus_slot_unref(u->match_bus_slot); |
05a98afd LP |
600 | sd_bus_track_unref(u->bus_track); |
601 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
602 | ||
a57f7e2c LP |
603 | unit_free_requires_mounts_for(u); |
604 | ||
ac155bb8 MS |
605 | SET_FOREACH(t, u->names, i) |
606 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 607 | |
4b58153d LP |
608 | if (!sd_id128_is_null(u->invocation_id)) |
609 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
610 | ||
97e7d748 MS |
611 | if (u->job) { |
612 | Job *j = u->job; | |
613 | job_uninstall(j); | |
614 | job_free(j); | |
615 | } | |
964e0949 | 616 | |
e0209d83 MS |
617 | if (u->nop_job) { |
618 | Job *j = u->nop_job; | |
619 | job_uninstall(j); | |
620 | job_free(j); | |
621 | } | |
622 | ||
964e0949 | 623 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 624 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 625 | |
adefcf28 LP |
626 | if (u->on_console) |
627 | manager_unref_console(u->manager); | |
628 | ||
efdb0237 | 629 | unit_release_cgroup(u); |
72673e86 | 630 | |
d3070fbd LP |
631 | if (!MANAGER_IS_RELOADING(u->manager)) |
632 | unit_unlink_state_files(u); | |
633 | ||
00d9ef85 LP |
634 | unit_unref_uid_gid(u, false); |
635 | ||
5269eb6b | 636 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 637 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 638 | |
a911bb9a LP |
639 | unit_unwatch_all_pids(u); |
640 | ||
702a2d8f | 641 | unit_ref_unset(&u->slice); |
7f7d01ed ZJS |
642 | while (u->refs_by_target) |
643 | unit_ref_unset(u->refs_by_target); | |
57020a3a | 644 | |
ac155bb8 | 645 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 646 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 647 | |
ac155bb8 | 648 | if (u->in_load_queue) |
71fda00f | 649 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 650 | |
ac155bb8 | 651 | if (u->in_dbus_queue) |
71fda00f | 652 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 653 | |
a2d72e26 | 654 | if (u->in_gc_queue) |
c5a97ed1 | 655 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 656 | |
91a6073e LP |
657 | if (u->in_cgroup_realize_queue) |
658 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 659 | |
09e24654 LP |
660 | if (u->in_cgroup_empty_queue) |
661 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
662 | ||
1bdf2790 ZJS |
663 | if (u->in_cleanup_queue) |
664 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
adefcf28 | 665 | |
19496554 MS |
666 | if (u->in_target_deps_queue) |
667 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
668 | ||
a3c1168a LP |
669 | if (u->in_stop_when_unneeded_queue) |
670 | LIST_REMOVE(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
671 | ||
6a48d82f DM |
672 | safe_close(u->ip_accounting_ingress_map_fd); |
673 | safe_close(u->ip_accounting_egress_map_fd); | |
72673e86 | 674 | |
6a48d82f DM |
675 | safe_close(u->ipv4_allow_map_fd); |
676 | safe_close(u->ipv6_allow_map_fd); | |
677 | safe_close(u->ipv4_deny_map_fd); | |
678 | safe_close(u->ipv6_deny_map_fd); | |
d3070fbd | 679 | |
6a48d82f | 680 | bpf_program_unref(u->ip_bpf_ingress); |
aa2b6f1d | 681 | bpf_program_unref(u->ip_bpf_ingress_installed); |
6a48d82f | 682 | bpf_program_unref(u->ip_bpf_egress); |
aa2b6f1d | 683 | bpf_program_unref(u->ip_bpf_egress_installed); |
00d9ef85 | 684 | |
084c7007 RG |
685 | bpf_program_unref(u->bpf_device_control_installed); |
686 | ||
a946fa9b ZJS |
687 | condition_free_list(u->conditions); |
688 | condition_free_list(u->asserts); | |
f755e3b7 | 689 | |
ac155bb8 | 690 | free(u->description); |
49dbfa7b | 691 | strv_free(u->documentation); |
ac155bb8 | 692 | free(u->fragment_path); |
1b64d026 | 693 | free(u->source_path); |
ae7a7182 | 694 | strv_free(u->dropin_paths); |
ac155bb8 | 695 | free(u->instance); |
87f0e418 | 696 | |
f189ab18 LP |
697 | free(u->job_timeout_reboot_arg); |
698 | ||
ac155bb8 | 699 | set_free_free(u->names); |
87f0e418 | 700 | |
6bf0f408 LP |
701 | free(u->reboot_arg); |
702 | ||
87f0e418 LP |
703 | free(u); |
704 | } | |
705 | ||
706 | UnitActiveState unit_active_state(Unit *u) { | |
707 | assert(u); | |
708 | ||
ac155bb8 | 709 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
710 | return unit_active_state(unit_follow_merge(u)); |
711 | ||
712 | /* After a reload it might happen that a unit is not correctly | |
713 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 714 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
715 | |
716 | return UNIT_VTABLE(u)->active_state(u); | |
717 | } | |
718 | ||
10a94420 LP |
719 | const char* unit_sub_state_to_string(Unit *u) { |
720 | assert(u); | |
721 | ||
722 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
723 | } | |
724 | ||
eef85c4a LP |
725 | static int set_complete_move(Set **s, Set **other) { |
726 | assert(s); | |
727 | assert(other); | |
728 | ||
729 | if (!other) | |
730 | return 0; | |
731 | ||
732 | if (*s) | |
733 | return set_move(*s, *other); | |
ae2a15bc LP |
734 | else |
735 | *s = TAKE_PTR(*other); | |
7c0b05e5 | 736 | |
eef85c4a LP |
737 | return 0; |
738 | } | |
739 | ||
740 | static int hashmap_complete_move(Hashmap **s, Hashmap **other) { | |
23a177ef LP |
741 | assert(s); |
742 | assert(other); | |
87f0e418 | 743 | |
23a177ef | 744 | if (!*other) |
7c0b05e5 | 745 | return 0; |
87f0e418 | 746 | |
eef85c4a LP |
747 | if (*s) |
748 | return hashmap_move(*s, *other); | |
ae2a15bc LP |
749 | else |
750 | *s = TAKE_PTR(*other); | |
7c0b05e5 MS |
751 | |
752 | return 0; | |
23a177ef | 753 | } |
87f0e418 | 754 | |
7c0b05e5 | 755 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
756 | char *t; |
757 | Iterator i; | |
7c0b05e5 | 758 | int r; |
87f0e418 | 759 | |
23a177ef LP |
760 | assert(u); |
761 | assert(other); | |
762 | ||
eef85c4a | 763 | r = set_complete_move(&u->names, &other->names); |
7c0b05e5 MS |
764 | if (r < 0) |
765 | return r; | |
23a177ef | 766 | |
ac155bb8 MS |
767 | set_free_free(other->names); |
768 | other->names = NULL; | |
769 | other->id = NULL; | |
23a177ef | 770 | |
ac155bb8 MS |
771 | SET_FOREACH(t, u->names, i) |
772 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
773 | |
774 | return 0; | |
87f0e418 LP |
775 | } |
776 | ||
09a65f92 MS |
777 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
778 | unsigned n_reserve; | |
779 | ||
780 | assert(u); | |
781 | assert(other); | |
782 | assert(d < _UNIT_DEPENDENCY_MAX); | |
783 | ||
784 | /* | |
785 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 786 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
787 | * as a whole to u by complete_move(). |
788 | */ | |
789 | if (!u->dependencies[d]) | |
790 | return 0; | |
791 | ||
792 | /* merge_dependencies() will skip a u-on-u dependency */ | |
eef85c4a | 793 | n_reserve = hashmap_size(other->dependencies[d]) - !!hashmap_get(other->dependencies[d], u); |
09a65f92 | 794 | |
eef85c4a | 795 | return hashmap_reserve(u->dependencies[d], n_reserve); |
09a65f92 MS |
796 | } |
797 | ||
d1fab3fe | 798 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
799 | Iterator i; |
800 | Unit *back; | |
eef85c4a | 801 | void *v; |
87f0e418 | 802 | int r; |
23a177ef | 803 | |
eef85c4a LP |
804 | /* Merges all dependencies of type 'd' of the unit 'other' into the deps of the unit 'u' */ |
805 | ||
23a177ef LP |
806 | assert(u); |
807 | assert(other); | |
808 | assert(d < _UNIT_DEPENDENCY_MAX); | |
809 | ||
5238e957 | 810 | /* Fix backwards pointers. Let's iterate through all dependent units of the other unit. */ |
eef85c4a | 811 | HASHMAP_FOREACH_KEY(v, back, other->dependencies[d], i) { |
23a177ef LP |
812 | UnitDependency k; |
813 | ||
eef85c4a LP |
814 | /* Let's now iterate through the dependencies of that dependencies of the other units, looking for |
815 | * pointers back, and let's fix them up, to instead point to 'u'. */ | |
816 | ||
e48614c4 | 817 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff | 818 | if (back == u) { |
eef85c4a LP |
819 | /* Do not add dependencies between u and itself. */ |
820 | if (hashmap_remove(back->dependencies[k], other)) | |
f2341e0a | 821 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff | 822 | } else { |
eef85c4a LP |
823 | UnitDependencyInfo di_u, di_other, di_merged; |
824 | ||
825 | /* Let's drop this dependency between "back" and "other", and let's create it between | |
826 | * "back" and "u" instead. Let's merge the bit masks of the dependency we are moving, | |
827 | * and any such dependency which might already exist */ | |
828 | ||
829 | di_other.data = hashmap_get(back->dependencies[k], other); | |
830 | if (!di_other.data) | |
831 | continue; /* dependency isn't set, let's try the next one */ | |
832 | ||
833 | di_u.data = hashmap_get(back->dependencies[k], u); | |
834 | ||
835 | di_merged = (UnitDependencyInfo) { | |
836 | .origin_mask = di_u.origin_mask | di_other.origin_mask, | |
837 | .destination_mask = di_u.destination_mask | di_other.destination_mask, | |
838 | }; | |
839 | ||
840 | r = hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data); | |
841 | if (r < 0) | |
842 | log_warning_errno(r, "Failed to remove/replace: back=%s other=%s u=%s: %m", back->id, other_id, u->id); | |
843 | assert(r >= 0); | |
844 | ||
845 | /* assert_se(hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data) >= 0); */ | |
e66047ff | 846 | } |
e48614c4 | 847 | } |
eef85c4a | 848 | |
23a177ef LP |
849 | } |
850 | ||
e66047ff | 851 | /* Also do not move dependencies on u to itself */ |
eef85c4a | 852 | back = hashmap_remove(other->dependencies[d], u); |
d1fab3fe | 853 | if (back) |
f2341e0a | 854 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 855 | |
7c0b05e5 | 856 | /* The move cannot fail. The caller must have performed a reservation. */ |
eef85c4a | 857 | assert_se(hashmap_complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); |
23a177ef | 858 | |
eef85c4a | 859 | other->dependencies[d] = hashmap_free(other->dependencies[d]); |
23a177ef LP |
860 | } |
861 | ||
862 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 863 | UnitDependency d; |
d1fab3fe | 864 | const char *other_id = NULL; |
09a65f92 | 865 | int r; |
87f0e418 LP |
866 | |
867 | assert(u); | |
868 | assert(other); | |
ac155bb8 MS |
869 | assert(u->manager == other->manager); |
870 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 871 | |
cc916967 LP |
872 | other = unit_follow_merge(other); |
873 | ||
23a177ef LP |
874 | if (other == u) |
875 | return 0; | |
876 | ||
ac155bb8 | 877 | if (u->type != other->type) |
9e2f7c11 LP |
878 | return -EINVAL; |
879 | ||
ac155bb8 | 880 | if (!u->instance != !other->instance) |
87f0e418 LP |
881 | return -EINVAL; |
882 | ||
8a993b61 | 883 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
884 | return -EEXIST; |
885 | ||
ec2ce0c5 | 886 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 887 | return -EEXIST; |
87f0e418 | 888 | |
ac155bb8 | 889 | if (other->job) |
819e213f LP |
890 | return -EEXIST; |
891 | ||
e0209d83 MS |
892 | if (other->nop_job) |
893 | return -EEXIST; | |
894 | ||
fdf20a31 | 895 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
896 | return -EEXIST; |
897 | ||
d1fab3fe ZJS |
898 | if (other->id) |
899 | other_id = strdupa(other->id); | |
900 | ||
09a65f92 MS |
901 | /* Make reservations to ensure merge_dependencies() won't fail */ |
902 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
903 | r = reserve_dependencies(u, other, d); | |
904 | /* | |
905 | * We don't rollback reservations if we fail. We don't have | |
906 | * a way to undo reservations. A reservation is not a leak. | |
907 | */ | |
908 | if (r < 0) | |
909 | return r; | |
910 | } | |
911 | ||
87f0e418 | 912 | /* Merge names */ |
7c0b05e5 MS |
913 | r = merge_names(u, other); |
914 | if (r < 0) | |
915 | return r; | |
87f0e418 | 916 | |
57020a3a | 917 | /* Redirect all references */ |
7f7d01ed ZJS |
918 | while (other->refs_by_target) |
919 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
57020a3a | 920 | |
87f0e418 LP |
921 | /* Merge dependencies */ |
922 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 923 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 924 | |
ac155bb8 MS |
925 | other->load_state = UNIT_MERGED; |
926 | other->merged_into = u; | |
23a177ef | 927 | |
3616a49c LP |
928 | /* If there is still some data attached to the other node, we |
929 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 930 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
931 | if (UNIT_VTABLE(other)->done) |
932 | UNIT_VTABLE(other)->done(other); | |
933 | ||
934 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
935 | unit_add_to_cleanup_queue(other); |
936 | ||
937 | return 0; | |
938 | } | |
939 | ||
940 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 941 | _cleanup_free_ char *s = NULL; |
23a177ef | 942 | Unit *other; |
9e2f7c11 | 943 | int r; |
23a177ef LP |
944 | |
945 | assert(u); | |
946 | assert(name); | |
947 | ||
7410616c | 948 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 949 | if (!u->instance) |
9e2f7c11 LP |
950 | return -EINVAL; |
951 | ||
7410616c LP |
952 | r = unit_name_replace_instance(name, u->instance, &s); |
953 | if (r < 0) | |
954 | return r; | |
9e2f7c11 LP |
955 | |
956 | name = s; | |
957 | } | |
958 | ||
c2756a68 | 959 | other = manager_get_unit(u->manager, name); |
7410616c LP |
960 | if (other) |
961 | return unit_merge(u, other); | |
23a177ef | 962 | |
7410616c | 963 | return unit_add_name(u, name); |
23a177ef LP |
964 | } |
965 | ||
966 | Unit* unit_follow_merge(Unit *u) { | |
967 | assert(u); | |
968 | ||
ac155bb8 MS |
969 | while (u->load_state == UNIT_MERGED) |
970 | assert_se(u = u->merged_into); | |
23a177ef LP |
971 | |
972 | return u; | |
973 | } | |
974 | ||
975 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
ada5e276 YW |
976 | ExecDirectoryType dt; |
977 | char **dp; | |
23a177ef LP |
978 | int r; |
979 | ||
980 | assert(u); | |
981 | assert(c); | |
982 | ||
e1e74614 | 983 | if (c->working_directory && !c->working_directory_missing_ok) { |
eef85c4a | 984 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
985 | if (r < 0) |
986 | return r; | |
987 | } | |
988 | ||
989 | if (c->root_directory) { | |
eef85c4a | 990 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
991 | if (r < 0) |
992 | return r; | |
993 | } | |
994 | ||
915e6d16 | 995 | if (c->root_image) { |
eef85c4a | 996 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
997 | if (r < 0) |
998 | return r; | |
999 | } | |
1000 | ||
72fd1768 | 1001 | for (dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
1002 | if (!u->manager->prefix[dt]) |
1003 | continue; | |
1004 | ||
1005 | STRV_FOREACH(dp, c->directories[dt].paths) { | |
1006 | _cleanup_free_ char *p; | |
1007 | ||
1008 | p = strjoin(u->manager->prefix[dt], "/", *dp); | |
1009 | if (!p) | |
1010 | return -ENOMEM; | |
1011 | ||
eef85c4a | 1012 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
1013 | if (r < 0) |
1014 | return r; | |
1015 | } | |
1016 | } | |
1017 | ||
463d0d15 | 1018 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
1019 | return 0; |
1020 | ||
1021 | if (c->private_tmp) { | |
d71f0505 LP |
1022 | const char *p; |
1023 | ||
1024 | FOREACH_STRING(p, "/tmp", "/var/tmp") { | |
eef85c4a | 1025 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
d71f0505 LP |
1026 | if (r < 0) |
1027 | return r; | |
1028 | } | |
b46a529c | 1029 | |
35d8c19a | 1030 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1031 | if (r < 0) |
1032 | return r; | |
1033 | } | |
1034 | ||
52c239d7 LB |
1035 | if (!IN_SET(c->std_output, |
1036 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1037 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1038 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE) && | |
1039 | !IN_SET(c->std_error, | |
1040 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1041 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1042 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE)) | |
23a177ef LP |
1043 | return 0; |
1044 | ||
1045 | /* If syslog or kernel logging is requested, make sure our own | |
1046 | * logging daemon is run first. */ | |
1047 | ||
35d8c19a | 1048 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1049 | if (r < 0) |
1050 | return r; | |
23a177ef | 1051 | |
87f0e418 LP |
1052 | return 0; |
1053 | } | |
1054 | ||
87f0e418 LP |
1055 | const char *unit_description(Unit *u) { |
1056 | assert(u); | |
1057 | ||
ac155bb8 MS |
1058 | if (u->description) |
1059 | return u->description; | |
87f0e418 | 1060 | |
ac155bb8 | 1061 | return strna(u->id); |
87f0e418 LP |
1062 | } |
1063 | ||
eef85c4a LP |
1064 | static void print_unit_dependency_mask(FILE *f, const char *kind, UnitDependencyMask mask, bool *space) { |
1065 | const struct { | |
1066 | UnitDependencyMask mask; | |
1067 | const char *name; | |
1068 | } table[] = { | |
1069 | { UNIT_DEPENDENCY_FILE, "file" }, | |
1070 | { UNIT_DEPENDENCY_IMPLICIT, "implicit" }, | |
1071 | { UNIT_DEPENDENCY_DEFAULT, "default" }, | |
1072 | { UNIT_DEPENDENCY_UDEV, "udev" }, | |
1073 | { UNIT_DEPENDENCY_PATH, "path" }, | |
1074 | { UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT, "mountinfo-implicit" }, | |
1075 | { UNIT_DEPENDENCY_MOUNTINFO_DEFAULT, "mountinfo-default" }, | |
1076 | { UNIT_DEPENDENCY_PROC_SWAP, "proc-swap" }, | |
1077 | }; | |
1078 | size_t i; | |
1079 | ||
1080 | assert(f); | |
1081 | assert(kind); | |
1082 | assert(space); | |
1083 | ||
1084 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
1085 | ||
1086 | if (mask == 0) | |
1087 | break; | |
1088 | ||
d94a24ca | 1089 | if (FLAGS_SET(mask, table[i].mask)) { |
eef85c4a LP |
1090 | if (*space) |
1091 | fputc(' ', f); | |
1092 | else | |
1093 | *space = true; | |
1094 | ||
1095 | fputs(kind, f); | |
1096 | fputs("-", f); | |
1097 | fputs(table[i].name, f); | |
1098 | ||
1099 | mask &= ~table[i].mask; | |
1100 | } | |
1101 | } | |
1102 | ||
1103 | assert(mask == 0); | |
1104 | } | |
1105 | ||
87f0e418 | 1106 | void unit_dump(Unit *u, FILE *f, const char *prefix) { |
49dbfa7b | 1107 | char *t, **j; |
87f0e418 LP |
1108 | UnitDependency d; |
1109 | Iterator i; | |
47be870b | 1110 | const char *prefix2; |
173e3821 | 1111 | char |
a483fb59 | 1112 | timestamp0[FORMAT_TIMESTAMP_MAX], |
173e3821 LP |
1113 | timestamp1[FORMAT_TIMESTAMP_MAX], |
1114 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
1115 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
1116 | timestamp4[FORMAT_TIMESTAMP_MAX], |
1117 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 1118 | Unit *following; |
eeaedb7c | 1119 | _cleanup_set_free_ Set *following_set = NULL; |
05a98afd | 1120 | const char *n; |
02638280 LP |
1121 | CGroupMask m; |
1122 | int r; | |
87f0e418 LP |
1123 | |
1124 | assert(u); | |
ac155bb8 | 1125 | assert(u->type >= 0); |
87f0e418 | 1126 | |
4c940960 | 1127 | prefix = strempty(prefix); |
63c372cb | 1128 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
1129 | |
1130 | fprintf(f, | |
40d50879 | 1131 | "%s-> Unit %s:\n" |
87f0e418 | 1132 | "%s\tDescription: %s\n" |
9e2f7c11 | 1133 | "%s\tInstance: %s\n" |
87f0e418 | 1134 | "%s\tUnit Load State: %s\n" |
2fad8195 | 1135 | "%s\tUnit Active State: %s\n" |
b895d155 | 1136 | "%s\tState Change Timestamp: %s\n" |
173e3821 | 1137 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 1138 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 1139 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 1140 | "%s\tInactive Enter Timestamp: %s\n" |
f2f725e5 | 1141 | "%s\tMay GC: %s\n" |
9444b1f2 | 1142 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 1143 | "%s\tTransient: %s\n" |
f5869324 | 1144 | "%s\tPerpetual: %s\n" |
5afe510c | 1145 | "%s\tGarbage Collection Mode: %s\n" |
4ad49000 LP |
1146 | "%s\tSlice: %s\n" |
1147 | "%s\tCGroup: %s\n" | |
aae7e17f | 1148 | "%s\tCGroup realized: %s\n", |
ac155bb8 | 1149 | prefix, u->id, |
87f0e418 | 1150 | prefix, unit_description(u), |
ac155bb8 MS |
1151 | prefix, strna(u->instance), |
1152 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 1153 | prefix, unit_active_state_to_string(unit_active_state(u)), |
a483fb59 | 1154 | prefix, strna(format_timestamp(timestamp0, sizeof(timestamp0), u->state_change_timestamp.realtime)), |
ac155bb8 MS |
1155 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
1156 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
1157 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
1158 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
f2f725e5 | 1159 | prefix, yes_no(unit_may_gc(u)), |
9444b1f2 | 1160 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 1161 | prefix, yes_no(u->transient), |
f5869324 | 1162 | prefix, yes_no(u->perpetual), |
5afe510c | 1163 | prefix, collect_mode_to_string(u->collect_mode), |
4ad49000 LP |
1164 | prefix, strna(unit_slice_name(u)), |
1165 | prefix, strna(u->cgroup_path), | |
aae7e17f FB |
1166 | prefix, yes_no(u->cgroup_realized)); |
1167 | ||
1168 | if (u->cgroup_realized_mask != 0) { | |
1169 | _cleanup_free_ char *s = NULL; | |
1170 | (void) cg_mask_to_string(u->cgroup_realized_mask, &s); | |
02638280 LP |
1171 | fprintf(f, "%s\tCGroup realized mask: %s\n", prefix, strnull(s)); |
1172 | } | |
0adf88b6 | 1173 | |
02638280 LP |
1174 | if (u->cgroup_enabled_mask != 0) { |
1175 | _cleanup_free_ char *s = NULL; | |
1176 | (void) cg_mask_to_string(u->cgroup_enabled_mask, &s); | |
1177 | fprintf(f, "%s\tCGroup enabled mask: %s\n", prefix, strnull(s)); | |
1178 | } | |
0adf88b6 | 1179 | |
02638280 LP |
1180 | m = unit_get_own_mask(u); |
1181 | if (m != 0) { | |
1182 | _cleanup_free_ char *s = NULL; | |
1183 | (void) cg_mask_to_string(m, &s); | |
1184 | fprintf(f, "%s\tCGroup own mask: %s\n", prefix, strnull(s)); | |
aae7e17f | 1185 | } |
0adf88b6 | 1186 | |
02638280 LP |
1187 | m = unit_get_members_mask(u); |
1188 | if (m != 0) { | |
aae7e17f | 1189 | _cleanup_free_ char *s = NULL; |
02638280 | 1190 | (void) cg_mask_to_string(m, &s); |
aae7e17f FB |
1191 | fprintf(f, "%s\tCGroup members mask: %s\n", prefix, strnull(s)); |
1192 | } | |
0301abf4 | 1193 | |
0adf88b6 LP |
1194 | m = unit_get_delegate_mask(u); |
1195 | if (m != 0) { | |
1196 | _cleanup_free_ char *s = NULL; | |
1197 | (void) cg_mask_to_string(m, &s); | |
1198 | fprintf(f, "%s\tCGroup delegate mask: %s\n", prefix, strnull(s)); | |
1199 | } | |
1200 | ||
ac155bb8 | 1201 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
1202 | fprintf(f, "%s\tName: %s\n", prefix, t); |
1203 | ||
4b58153d LP |
1204 | if (!sd_id128_is_null(u->invocation_id)) |
1205 | fprintf(f, "%s\tInvocation ID: " SD_ID128_FORMAT_STR "\n", | |
1206 | prefix, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
1207 | ||
49dbfa7b LP |
1208 | STRV_FOREACH(j, u->documentation) |
1209 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
1210 | ||
eeaedb7c LP |
1211 | following = unit_following(u); |
1212 | if (following) | |
ac155bb8 | 1213 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 1214 | |
eeaedb7c LP |
1215 | r = unit_following_set(u, &following_set); |
1216 | if (r >= 0) { | |
1217 | Unit *other; | |
1218 | ||
1219 | SET_FOREACH(other, following_set, i) | |
1220 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
1221 | } | |
1222 | ||
ac155bb8 MS |
1223 | if (u->fragment_path) |
1224 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 1225 | |
1b64d026 LP |
1226 | if (u->source_path) |
1227 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
1228 | ||
ae7a7182 | 1229 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 1230 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 1231 | |
e7dfbb4e LP |
1232 | if (u->failure_action != EMERGENCY_ACTION_NONE) |
1233 | fprintf(f, "%s\tFailure Action: %s\n", prefix, emergency_action_to_string(u->failure_action)); | |
7af67e9a LP |
1234 | if (u->failure_action_exit_status >= 0) |
1235 | fprintf(f, "%s\tFailure Action Exit Status: %i\n", prefix, u->failure_action_exit_status); | |
e7dfbb4e LP |
1236 | if (u->success_action != EMERGENCY_ACTION_NONE) |
1237 | fprintf(f, "%s\tSuccess Action: %s\n", prefix, emergency_action_to_string(u->success_action)); | |
7af67e9a LP |
1238 | if (u->success_action_exit_status >= 0) |
1239 | fprintf(f, "%s\tSuccess Action Exit Status: %i\n", prefix, u->success_action_exit_status); | |
e7dfbb4e | 1240 | |
36c16a7c | 1241 | if (u->job_timeout != USEC_INFINITY) |
2fa4092c | 1242 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 1243 | |
87a47f99 LN |
1244 | if (u->job_timeout_action != EMERGENCY_ACTION_NONE) |
1245 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, emergency_action_to_string(u->job_timeout_action)); | |
f189ab18 LP |
1246 | |
1247 | if (u->job_timeout_reboot_arg) | |
1248 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
1249 | ||
59fccdc5 LP |
1250 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
1251 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 1252 | |
ac155bb8 | 1253 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
1254 | fprintf(f, |
1255 | "%s\tCondition Timestamp: %s\n" | |
1256 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
1257 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
1258 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 1259 | |
59fccdc5 LP |
1260 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
1261 | fprintf(f, | |
1262 | "%s\tAssert Timestamp: %s\n" | |
1263 | "%s\tAssert Result: %s\n", | |
1264 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
1265 | prefix, yes_no(u->assert_result)); | |
1266 | ||
87f0e418 | 1267 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
eef85c4a | 1268 | UnitDependencyInfo di; |
87f0e418 LP |
1269 | Unit *other; |
1270 | ||
eef85c4a LP |
1271 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { |
1272 | bool space = false; | |
1273 | ||
1274 | fprintf(f, "%s\t%s: %s (", prefix, unit_dependency_to_string(d), other->id); | |
1275 | ||
1276 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); | |
1277 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1278 | ||
1279 | fputs(")\n", f); | |
1280 | } | |
87f0e418 LP |
1281 | } |
1282 | ||
eef85c4a LP |
1283 | if (!hashmap_isempty(u->requires_mounts_for)) { |
1284 | UnitDependencyInfo di; | |
1285 | const char *path; | |
1286 | ||
1287 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { | |
1288 | bool space = false; | |
7c8fa05c | 1289 | |
eef85c4a | 1290 | fprintf(f, "%s\tRequiresMountsFor: %s (", prefix, path); |
7c8fa05c | 1291 | |
eef85c4a LP |
1292 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); |
1293 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1294 | ||
1295 | fputs(")\n", f); | |
1296 | } | |
7c8fa05c LP |
1297 | } |
1298 | ||
ac155bb8 | 1299 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 1300 | |
b0650475 | 1301 | fprintf(f, |
a40eb732 | 1302 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
1303 | "%s\tRefuseManualStart: %s\n" |
1304 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 1305 | "%s\tDefaultDependencies: %s\n" |
d420282b | 1306 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1307 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1308 | prefix, yes_no(u->stop_when_unneeded), |
1309 | prefix, yes_no(u->refuse_manual_start), | |
1310 | prefix, yes_no(u->refuse_manual_stop), | |
1311 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1312 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1313 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 1314 | |
23a177ef LP |
1315 | if (UNIT_VTABLE(u)->dump) |
1316 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1317 | |
ac155bb8 | 1318 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1319 | fprintf(f, |
1320 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1321 | prefix, u->merged_into->id); |
1322 | else if (u->load_state == UNIT_ERROR) | |
1323 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 1324 | |
05a98afd LP |
1325 | for (n = sd_bus_track_first(u->bus_track); n; n = sd_bus_track_next(u->bus_track)) |
1326 | fprintf(f, "%s\tBus Ref: %s\n", prefix, n); | |
87f0e418 | 1327 | |
ac155bb8 MS |
1328 | if (u->job) |
1329 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1330 | |
e0209d83 MS |
1331 | if (u->nop_job) |
1332 | job_dump(u->nop_job, f, prefix2); | |
87f0e418 LP |
1333 | } |
1334 | ||
1335 | /* Common implementation for multiple backends */ | |
e537352b | 1336 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1337 | int r; |
1338 | ||
1339 | assert(u); | |
23a177ef | 1340 | |
e48614c4 | 1341 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1342 | r = unit_load_fragment(u); |
1343 | if (r < 0) | |
23a177ef LP |
1344 | return r; |
1345 | ||
ac155bb8 | 1346 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1347 | return -ENOENT; |
1348 | ||
9e4ea9cc ZJS |
1349 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1350 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1351 | * been loaded and which not, at least without doing complicated book-keeping, | |
1352 | * so let's always reread all drop-ins. */ | |
1353 | return unit_load_dropin(unit_follow_merge(u)); | |
23a177ef LP |
1354 | } |
1355 | ||
1356 | /* Common implementation for multiple backends */ | |
e537352b | 1357 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1358 | int r; |
87f0e418 LP |
1359 | |
1360 | assert(u); | |
1361 | ||
23a177ef LP |
1362 | /* Same as unit_load_fragment_and_dropin(), but whether |
1363 | * something can be loaded or not doesn't matter. */ | |
1364 | ||
e9e8cbc8 | 1365 | /* Load a .service/.socket/.slice/… file */ |
4ad49000 LP |
1366 | r = unit_load_fragment(u); |
1367 | if (r < 0) | |
87f0e418 LP |
1368 | return r; |
1369 | ||
ac155bb8 MS |
1370 | if (u->load_state == UNIT_STUB) |
1371 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1372 | |
9e4ea9cc ZJS |
1373 | /* Load drop-in directory data */ |
1374 | return unit_load_dropin(unit_follow_merge(u)); | |
87f0e418 LP |
1375 | } |
1376 | ||
19496554 MS |
1377 | void unit_add_to_target_deps_queue(Unit *u) { |
1378 | Manager *m = u->manager; | |
1379 | ||
1380 | assert(u); | |
1381 | ||
1382 | if (u->in_target_deps_queue) | |
1383 | return; | |
1384 | ||
1385 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1386 | u->in_target_deps_queue = true; | |
1387 | } | |
1388 | ||
bba34eed | 1389 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1390 | assert(u); |
1391 | assert(target); | |
1392 | ||
ac155bb8 | 1393 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1394 | return 0; |
1395 | ||
35b8ca3a | 1396 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1397 | * that loop check below is reliable */ |
ac155bb8 MS |
1398 | if (u->load_state != UNIT_LOADED || |
1399 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1400 | return 0; |
1401 | ||
21256a2b LP |
1402 | /* If either side wants no automatic dependencies, then let's |
1403 | * skip this */ | |
ac155bb8 MS |
1404 | if (!u->default_dependencies || |
1405 | !target->default_dependencies) | |
21256a2b LP |
1406 | return 0; |
1407 | ||
98bc2000 | 1408 | /* Don't create loops */ |
eef85c4a | 1409 | if (hashmap_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1410 | return 0; |
1411 | ||
eef85c4a | 1412 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1413 | } |
1414 | ||
e954c9cf | 1415 | static int unit_add_slice_dependencies(Unit *u) { |
eef85c4a | 1416 | UnitDependencyMask mask; |
e954c9cf | 1417 | assert(u); |
b81884e7 | 1418 | |
35b7ff80 | 1419 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1420 | return 0; |
1421 | ||
eef85c4a LP |
1422 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1423 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1424 | relationship). */ | |
1425 | mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; | |
1426 | ||
e954c9cf | 1427 | if (UNIT_ISSET(u->slice)) |
eef85c4a | 1428 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true, mask); |
e954c9cf | 1429 | |
8c8da0e0 | 1430 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1431 | return 0; |
1432 | ||
5a724170 | 1433 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, true, mask); |
98bc2000 LP |
1434 | } |
1435 | ||
e954c9cf | 1436 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1437 | UnitDependencyInfo di; |
1438 | const char *path; | |
1439 | Iterator i; | |
9588bc32 LP |
1440 | int r; |
1441 | ||
1442 | assert(u); | |
1443 | ||
eef85c4a LP |
1444 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { |
1445 | char prefix[strlen(path) + 1]; | |
9588bc32 | 1446 | |
eef85c4a | 1447 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1448 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1449 | Unit *m; |
1450 | ||
c7c89abb | 1451 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1452 | if (r < 0) |
1453 | return r; | |
c7c89abb FB |
1454 | |
1455 | m = manager_get_unit(u->manager, p); | |
1456 | if (!m) { | |
1457 | /* Make sure to load the mount unit if | |
1458 | * it exists. If so the dependencies | |
1459 | * on this unit will be added later | |
1460 | * during the loading of the mount | |
1461 | * unit. */ | |
1462 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1463 | continue; |
c7c89abb | 1464 | } |
9588bc32 LP |
1465 | if (m == u) |
1466 | continue; | |
1467 | ||
1468 | if (m->load_state != UNIT_LOADED) | |
1469 | continue; | |
1470 | ||
eef85c4a | 1471 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1472 | if (r < 0) |
1473 | return r; | |
1474 | ||
1475 | if (m->fragment_path) { | |
eef85c4a | 1476 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1477 | if (r < 0) |
1478 | return r; | |
1479 | } | |
1480 | } | |
1481 | } | |
1482 | ||
1483 | return 0; | |
1484 | } | |
1485 | ||
95ae05c0 WC |
1486 | static int unit_add_startup_units(Unit *u) { |
1487 | CGroupContext *c; | |
5269eb6b | 1488 | int r; |
95ae05c0 WC |
1489 | |
1490 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1491 | if (!c) |
1492 | return 0; | |
1493 | ||
d53d9474 | 1494 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1495 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1496 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1497 | return 0; |
1498 | ||
5269eb6b LP |
1499 | r = set_ensure_allocated(&u->manager->startup_units, NULL); |
1500 | if (r < 0) | |
1501 | return r; | |
1502 | ||
756c09e6 | 1503 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1504 | } |
1505 | ||
87f0e418 LP |
1506 | int unit_load(Unit *u) { |
1507 | int r; | |
1508 | ||
1509 | assert(u); | |
1510 | ||
ac155bb8 | 1511 | if (u->in_load_queue) { |
71fda00f | 1512 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1513 | u->in_load_queue = false; |
87f0e418 LP |
1514 | } |
1515 | ||
ac155bb8 | 1516 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1517 | return -EINVAL; |
1518 | ||
ac155bb8 | 1519 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1520 | return 0; |
1521 | ||
4f4afc88 | 1522 | if (u->transient_file) { |
66fa4bdd LP |
1523 | /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup |
1524 | * is complete, hence let's synchronize the unit file we just wrote to disk. */ | |
1525 | ||
4f4afc88 LP |
1526 | r = fflush_and_check(u->transient_file); |
1527 | if (r < 0) | |
1528 | goto fail; | |
1529 | ||
50fb00b7 | 1530 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1531 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1532 | } |
1533 | ||
c2756a68 LP |
1534 | if (UNIT_VTABLE(u)->load) { |
1535 | r = UNIT_VTABLE(u)->load(u); | |
1536 | if (r < 0) | |
87f0e418 | 1537 | goto fail; |
c2756a68 | 1538 | } |
23a177ef | 1539 | |
ac155bb8 | 1540 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1541 | r = -ENOENT; |
1542 | goto fail; | |
1543 | } | |
1544 | ||
7c8fa05c | 1545 | if (u->load_state == UNIT_LOADED) { |
19496554 | 1546 | unit_add_to_target_deps_queue(u); |
e954c9cf LP |
1547 | |
1548 | r = unit_add_slice_dependencies(u); | |
1549 | if (r < 0) | |
1550 | goto fail; | |
c2756a68 | 1551 | |
e954c9cf | 1552 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1553 | if (r < 0) |
c2756a68 | 1554 | goto fail; |
7c8fa05c | 1555 | |
95ae05c0 WC |
1556 | r = unit_add_startup_units(u); |
1557 | if (r < 0) | |
1558 | goto fail; | |
1559 | ||
eef85c4a | 1560 | if (u->on_failure_job_mode == JOB_ISOLATE && hashmap_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1561 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
6f40aa45 | 1562 | r = -ENOEXEC; |
c2756a68 LP |
1563 | goto fail; |
1564 | } | |
bc432dc7 | 1565 | |
a2df3ea4 MK |
1566 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1567 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1568 | ||
5af88058 LP |
1569 | /* We finished loading, let's ensure our parents recalculate the members mask */ |
1570 | unit_invalidate_cgroup_members_masks(u); | |
f68319bb LP |
1571 | } |
1572 | ||
ac155bb8 | 1573 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1574 | |
1575 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1576 | unit_add_to_gc_queue(u); |
87f0e418 | 1577 | |
87f0e418 LP |
1578 | return 0; |
1579 | ||
1580 | fail: | |
c4555ad8 LP |
1581 | /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code should hence |
1582 | * return ENOEXEC to ensure units are placed in this state after loading */ | |
1583 | ||
1584 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : | |
1585 | r == -ENOEXEC ? UNIT_BAD_SETTING : | |
1586 | UNIT_ERROR; | |
ac155bb8 | 1587 | u->load_error = r; |
c4555ad8 | 1588 | |
c1e1601e | 1589 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1590 | unit_add_to_gc_queue(u); |
23a177ef | 1591 | |
c4555ad8 | 1592 | return log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
87f0e418 LP |
1593 | } |
1594 | ||
f9f88198 YW |
1595 | _printf_(7, 8) |
1596 | static int log_unit_internal(void *userdata, int level, int error, const char *file, int line, const char *func, const char *format, ...) { | |
1597 | Unit *u = userdata; | |
1598 | va_list ap; | |
1599 | int r; | |
49365733 | 1600 | |
f9f88198 YW |
1601 | va_start(ap, format); |
1602 | if (u) | |
1603 | r = log_object_internalv(level, error, file, line, func, | |
1604 | u->manager->unit_log_field, | |
1605 | u->id, | |
1606 | u->manager->invocation_log_field, | |
1607 | u->invocation_id_string, | |
1608 | format, ap); | |
1609 | else | |
1610 | r = log_internalv(level, error, file, line, func, format, ap); | |
1611 | va_end(ap); | |
49365733 | 1612 | |
f9f88198 | 1613 | return r; |
49365733 LP |
1614 | } |
1615 | ||
97a3f4ee | 1616 | static bool unit_test_condition(Unit *u) { |
90bbc946 LP |
1617 | assert(u); |
1618 | ||
ac155bb8 | 1619 | dual_timestamp_get(&u->condition_timestamp); |
f9f88198 | 1620 | u->condition_result = condition_test_list(u->conditions, condition_type_to_string, log_unit_internal, u); |
90bbc946 | 1621 | |
e18f8852 LP |
1622 | unit_add_to_dbus_queue(u); |
1623 | ||
ac155bb8 | 1624 | return u->condition_result; |
90bbc946 LP |
1625 | } |
1626 | ||
97a3f4ee | 1627 | static bool unit_test_assert(Unit *u) { |
59fccdc5 LP |
1628 | assert(u); |
1629 | ||
1630 | dual_timestamp_get(&u->assert_timestamp); | |
f9f88198 | 1631 | u->assert_result = condition_test_list(u->asserts, assert_type_to_string, log_unit_internal, u); |
59fccdc5 | 1632 | |
e18f8852 LP |
1633 | unit_add_to_dbus_queue(u); |
1634 | ||
59fccdc5 LP |
1635 | return u->assert_result; |
1636 | } | |
1637 | ||
df446f96 | 1638 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
5b262f74 LP |
1639 | const char *d; |
1640 | ||
1641 | d = unit_description(u); | |
1642 | if (log_get_show_color()) | |
1643 | d = strjoina(ANSI_HIGHLIGHT, d, ANSI_NORMAL); | |
1644 | ||
df446f96 | 1645 | DISABLE_WARNING_FORMAT_NONLITERAL; |
5b262f74 | 1646 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, status, unit_status_msg_format, d); |
df446f96 LP |
1647 | REENABLE_WARNING; |
1648 | } | |
1649 | ||
97a3f4ee | 1650 | int unit_test_start_limit(Unit *u) { |
429926e9 TR |
1651 | const char *reason; |
1652 | ||
6bf0f408 LP |
1653 | assert(u); |
1654 | ||
7994ac1d | 1655 | if (ratelimit_below(&u->start_limit)) { |
6bf0f408 LP |
1656 | u->start_limit_hit = false; |
1657 | return 0; | |
1658 | } | |
1659 | ||
1660 | log_unit_warning(u, "Start request repeated too quickly."); | |
1661 | u->start_limit_hit = true; | |
1662 | ||
429926e9 TR |
1663 | reason = strjoina("unit ", u->id, " failed"); |
1664 | ||
36c4dc08 LP |
1665 | emergency_action(u->manager, u->start_limit_action, |
1666 | EMERGENCY_ACTION_IS_WATCHDOG|EMERGENCY_ACTION_WARN, | |
1667 | u->reboot_arg, -1, reason); | |
1668 | ||
1669 | return -ECANCELED; | |
6bf0f408 LP |
1670 | } |
1671 | ||
c891efaf | 1672 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1673 | assert(u); |
c891efaf FB |
1674 | |
1675 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1676 | return false; | |
1677 | ||
1678 | /* For some reasons units remaining in the same process group | |
1679 | * as PID 1 fail to acquire the console even if it's not used | |
1680 | * by any process. So skip the confirmation question for them. */ | |
1681 | return !unit_get_exec_context(u)->same_pgrp; | |
1682 | } | |
1683 | ||
631b676b LP |
1684 | static bool unit_verify_deps(Unit *u) { |
1685 | Unit *other; | |
1686 | Iterator j; | |
eef85c4a | 1687 | void *v; |
631b676b LP |
1688 | |
1689 | assert(u); | |
1690 | ||
1691 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with | |
1692 | * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job | |
1693 | * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in | |
1694 | * conjunction with After= as for them any such check would make things entirely racy. */ | |
1695 | ||
eef85c4a | 1696 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], j) { |
631b676b | 1697 | |
eef85c4a | 1698 | if (!hashmap_contains(u->dependencies[UNIT_AFTER], other)) |
631b676b LP |
1699 | continue; |
1700 | ||
1701 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1702 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1703 | return false; | |
1704 | } | |
1705 | } | |
1706 | ||
1707 | return true; | |
1708 | } | |
1709 | ||
9adb6959 | 1710 | /* Errors that aren't really errors: |
6bf0f408 | 1711 | * -EALREADY: Unit is already started. |
9adb6959 | 1712 | * -ECOMM: Condition failed |
6bf0f408 | 1713 | * -EAGAIN: An operation is already in progress. Retry later. |
9adb6959 LP |
1714 | * |
1715 | * Errors that are real errors: | |
1716 | * -EBADR: This unit type does not support starting. | |
2de9b979 | 1717 | * -ECANCELED: Start limit hit, too many requests for now |
6bf0f408 LP |
1718 | * -EPROTO: Assert failed |
1719 | * -EINVAL: Unit not loaded | |
1720 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1721 | * -ENOLINK: The necessary dependencies are not fulfilled. |
d4fd1cf2 | 1722 | * -ESTALE: This unit has been started before and can't be started a second time |
a4191c9f | 1723 | * -ENOENT: This is a triggering unit and unit to trigger is not loaded |
87f0e418 LP |
1724 | */ |
1725 | int unit_start(Unit *u) { | |
1726 | UnitActiveState state; | |
92ab323c | 1727 | Unit *following; |
2de9b979 | 1728 | int r; |
87f0e418 LP |
1729 | |
1730 | assert(u); | |
1731 | ||
5766aca8 LP |
1732 | /* If this is already started, then this will succeed. Note that this will even succeed if this unit |
1733 | * is not startable by the user. This is relied on to detect when we need to wait for units and when | |
1734 | * waiting is finished. */ | |
87f0e418 LP |
1735 | state = unit_active_state(u); |
1736 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1737 | return -EALREADY; | |
1738 | ||
6bf0f408 LP |
1739 | /* Units that aren't loaded cannot be started */ |
1740 | if (u->load_state != UNIT_LOADED) | |
1741 | return -EINVAL; | |
1742 | ||
d4fd1cf2 LP |
1743 | /* Refuse starting scope units more than once */ |
1744 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1745 | return -ESTALE; | |
1746 | ||
5766aca8 LP |
1747 | /* If the conditions failed, don't do anything at all. If we already are activating this call might |
1748 | * still be useful to speed up activation in case there is some hold-off time, but we don't want to | |
1749 | * recheck the condition in that case. */ | |
a82e5507 | 1750 | if (state != UNIT_ACTIVATING && |
2de9b979 LP |
1751 | !unit_test_condition(u)) { |
1752 | ||
1753 | /* Let's also check the start limit here. Normally, the start limit is only checked by the | |
1754 | * .start() method of the unit type after it did some additional checks verifying everything | |
1755 | * is in order (so that those other checks can propagate errors properly). However, if a | |
1756 | * condition check doesn't hold we don't get that far but we should still ensure we are not | |
1757 | * called in a tight loop without a rate limit check enforced, hence do the check here. Note | |
1758 | * that ECOMM is generally not a reason for a job to fail, unlike most other errors here, | |
1759 | * hence the chance is big that any triggering unit for us will trigger us again. Note this | |
1760 | * condition check is a bit different from the condition check inside the per-unit .start() | |
1761 | * function, as this one will not change the unit's state in any way (and we shouldn't here, | |
1762 | * after all the condition failed). */ | |
1763 | ||
1764 | r = unit_test_start_limit(u); | |
1765 | if (r < 0) | |
1766 | return r; | |
1767 | ||
5766aca8 | 1768 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(ECOMM), "Starting requested but condition failed. Not starting unit."); |
2de9b979 | 1769 | } |
52661efd | 1770 | |
59fccdc5 LP |
1771 | /* If the asserts failed, fail the entire job */ |
1772 | if (state != UNIT_ACTIVATING && | |
5766aca8 LP |
1773 | !unit_test_assert(u)) |
1774 | return log_unit_notice_errno(u, SYNTHETIC_ERRNO(EPROTO), "Starting requested but asserts failed."); | |
59fccdc5 | 1775 | |
5766aca8 LP |
1776 | /* Units of types that aren't supported cannot be started. Note that we do this test only after the |
1777 | * condition checks, so that we rather return condition check errors (which are usually not | |
1778 | * considered a true failure) than "not supported" errors (which are considered a failure). | |
d11a7645 LP |
1779 | */ |
1780 | if (!unit_supported(u)) | |
1781 | return -EOPNOTSUPP; | |
1782 | ||
5766aca8 LP |
1783 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine |
1784 | * should have taken care of this already, but let's check this here again. After all, our | |
1785 | * dependencies might not be in effect anymore, due to a reload or due to a failed condition. */ | |
631b676b LP |
1786 | if (!unit_verify_deps(u)) |
1787 | return -ENOLINK; | |
1788 | ||
92ab323c | 1789 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1790 | following = unit_following(u); |
1791 | if (following) { | |
f2341e0a | 1792 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1793 | return unit_start(following); |
1794 | } | |
1795 | ||
1796 | /* If it is stopped, but we cannot start it, then fail */ | |
1797 | if (!UNIT_VTABLE(u)->start) | |
1798 | return -EBADR; | |
1799 | ||
5766aca8 LP |
1800 | /* We don't suppress calls to ->start() here when we are already starting, to allow this request to |
1801 | * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it | |
1802 | * waits for a holdoff timer to elapse before it will start again. */ | |
87f0e418 | 1803 | |
c1e1601e | 1804 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1805 | |
d1a34ae9 | 1806 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1807 | } |
1808 | ||
1809 | bool unit_can_start(Unit *u) { | |
1810 | assert(u); | |
1811 | ||
8ff4d2ab LP |
1812 | if (u->load_state != UNIT_LOADED) |
1813 | return false; | |
1814 | ||
1815 | if (!unit_supported(u)) | |
1816 | return false; | |
1817 | ||
d4fd1cf2 LP |
1818 | /* Scope units may be started only once */ |
1819 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
1820 | return false; | |
1821 | ||
87f0e418 LP |
1822 | return !!UNIT_VTABLE(u)->start; |
1823 | } | |
1824 | ||
2528a7a6 LP |
1825 | bool unit_can_isolate(Unit *u) { |
1826 | assert(u); | |
1827 | ||
1828 | return unit_can_start(u) && | |
ac155bb8 | 1829 | u->allow_isolate; |
2528a7a6 LP |
1830 | } |
1831 | ||
87f0e418 LP |
1832 | /* Errors: |
1833 | * -EBADR: This unit type does not support stopping. | |
1834 | * -EALREADY: Unit is already stopped. | |
1835 | * -EAGAIN: An operation is already in progress. Retry later. | |
1836 | */ | |
1837 | int unit_stop(Unit *u) { | |
1838 | UnitActiveState state; | |
92ab323c | 1839 | Unit *following; |
87f0e418 LP |
1840 | |
1841 | assert(u); | |
1842 | ||
87f0e418 | 1843 | state = unit_active_state(u); |
fdf20a31 | 1844 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1845 | return -EALREADY; |
1846 | ||
0faacd47 LP |
1847 | following = unit_following(u); |
1848 | if (following) { | |
f2341e0a | 1849 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1850 | return unit_stop(following); |
1851 | } | |
1852 | ||
7898b0cf LP |
1853 | if (!UNIT_VTABLE(u)->stop) |
1854 | return -EBADR; | |
1855 | ||
c1e1601e | 1856 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1857 | |
d1a34ae9 | 1858 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1859 | } |
1860 | ||
f5869324 LP |
1861 | bool unit_can_stop(Unit *u) { |
1862 | assert(u); | |
1863 | ||
1864 | if (!unit_supported(u)) | |
1865 | return false; | |
1866 | ||
1867 | if (u->perpetual) | |
1868 | return false; | |
1869 | ||
1870 | return !!UNIT_VTABLE(u)->stop; | |
1871 | } | |
1872 | ||
87f0e418 LP |
1873 | /* Errors: |
1874 | * -EBADR: This unit type does not support reloading. | |
1875 | * -ENOEXEC: Unit is not started. | |
1876 | * -EAGAIN: An operation is already in progress. Retry later. | |
1877 | */ | |
1878 | int unit_reload(Unit *u) { | |
1879 | UnitActiveState state; | |
92ab323c | 1880 | Unit *following; |
87f0e418 LP |
1881 | |
1882 | assert(u); | |
1883 | ||
ac155bb8 | 1884 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1885 | return -EINVAL; |
1886 | ||
87f0e418 LP |
1887 | if (!unit_can_reload(u)) |
1888 | return -EBADR; | |
1889 | ||
1890 | state = unit_active_state(u); | |
e364ad06 | 1891 | if (state == UNIT_RELOADING) |
6255af75 | 1892 | return -EAGAIN; |
87f0e418 | 1893 | |
6a371e23 | 1894 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1895 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1896 | return -ENOEXEC; |
6a371e23 | 1897 | } |
87f0e418 | 1898 | |
e48614c4 ZJS |
1899 | following = unit_following(u); |
1900 | if (following) { | |
f2341e0a | 1901 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1902 | return unit_reload(following); |
1903 | } | |
1904 | ||
c1e1601e | 1905 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1906 | |
f54bcca5 JR |
1907 | if (!UNIT_VTABLE(u)->reload) { |
1908 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
2ad2e41a | 1909 | unit_notify(u, unit_active_state(u), unit_active_state(u), 0); |
f54bcca5 JR |
1910 | return 0; |
1911 | } | |
1912 | ||
d1a34ae9 | 1913 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1914 | } |
1915 | ||
1916 | bool unit_can_reload(Unit *u) { | |
1917 | assert(u); | |
1918 | ||
f54bcca5 JR |
1919 | if (UNIT_VTABLE(u)->can_reload) |
1920 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 1921 | |
eef85c4a | 1922 | if (!hashmap_isempty(u->dependencies[UNIT_PROPAGATES_RELOAD_TO])) |
87f0e418 LP |
1923 | return true; |
1924 | ||
f54bcca5 | 1925 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
1926 | } |
1927 | ||
a3c1168a LP |
1928 | bool unit_is_unneeded(Unit *u) { |
1929 | static const UnitDependency deps[] = { | |
be7d9ff7 | 1930 | UNIT_REQUIRED_BY, |
084918ba | 1931 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1932 | UNIT_WANTED_BY, |
1933 | UNIT_BOUND_BY, | |
1934 | }; | |
a3c1168a | 1935 | size_t j; |
f3bff0eb LP |
1936 | |
1937 | assert(u); | |
1938 | ||
ac155bb8 | 1939 | if (!u->stop_when_unneeded) |
a3c1168a | 1940 | return false; |
f3bff0eb | 1941 | |
a3c1168a LP |
1942 | /* Don't clean up while the unit is transitioning or is even inactive. */ |
1943 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
1944 | return false; | |
1945 | if (u->job) | |
1946 | return false; | |
f3bff0eb | 1947 | |
a3c1168a | 1948 | for (j = 0; j < ELEMENTSOF(deps); j++) { |
eef85c4a LP |
1949 | Unit *other; |
1950 | Iterator i; | |
1951 | void *v; | |
1952 | ||
fda09318 | 1953 | /* If a dependent unit has a job queued, is active or transitioning, or is marked for |
a3c1168a | 1954 | * restart, then don't clean this one up. */ |
b81884e7 | 1955 | |
a3c1168a | 1956 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[deps[j]], i) { |
93d4cb09 | 1957 | if (other->job) |
a3c1168a LP |
1958 | return false; |
1959 | ||
1960 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1961 | return false; | |
1962 | ||
1963 | if (unit_will_restart(other)) | |
1964 | return false; | |
1965 | } | |
bea355da LP |
1966 | } |
1967 | ||
a3c1168a LP |
1968 | return true; |
1969 | } | |
f3bff0eb | 1970 | |
a3c1168a LP |
1971 | static void check_unneeded_dependencies(Unit *u) { |
1972 | ||
1973 | static const UnitDependency deps[] = { | |
1974 | UNIT_REQUIRES, | |
1975 | UNIT_REQUISITE, | |
1976 | UNIT_WANTS, | |
1977 | UNIT_BINDS_TO, | |
1978 | }; | |
1979 | size_t j; | |
1980 | ||
1981 | assert(u); | |
1982 | ||
1983 | /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */ | |
1984 | ||
1985 | for (j = 0; j < ELEMENTSOF(deps); j++) { | |
1986 | Unit *other; | |
1987 | Iterator i; | |
1988 | void *v; | |
1989 | ||
1990 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[deps[j]], i) | |
fda09318 | 1991 | unit_submit_to_stop_when_unneeded_queue(other); |
a3c1168a | 1992 | } |
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. */ | |
7994ac1d | 2032 | if (!ratelimit_below(&u->auto_stop_ratelimit)) { |
67bfdc97 LP |
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. */ | |
50cbaba4 | 2041 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, NULL, &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))) |
50cbaba4 | 2057 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, 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))) |
50cbaba4 | 2062 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, 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))) |
50cbaba4 | 2067 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, 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))) |
50cbaba4 | 2071 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, 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))) |
50cbaba4 | 2075 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, 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))) |
50cbaba4 | 2089 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
cd0504d0 MS |
2090 | } |
2091 | ||
3ecaa09b | 2092 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
2093 | Unit *other; |
2094 | Iterator i; | |
eef85c4a | 2095 | void *v; |
7f66b026 | 2096 | int r; |
c0daa706 LP |
2097 | |
2098 | assert(u); | |
2099 | ||
eef85c4a | 2100 | if (hashmap_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
2101 | return; |
2102 | ||
f2341e0a | 2103 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 2104 | |
eef85c4a | 2105 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_ON_FAILURE], i) { |
7f66b026 | 2106 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
222ae6a8 | 2107 | |
50cbaba4 | 2108 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, NULL, &error, NULL); |
c1b6628d | 2109 | if (r < 0) |
7f66b026 | 2110 | log_unit_warning_errno(u, r, "Failed to enqueue OnFailure= job, ignoring: %s", bus_error_message(&error, r)); |
222ae6a8 | 2111 | } |
c0daa706 LP |
2112 | } |
2113 | ||
3ecaa09b LP |
2114 | void unit_trigger_notify(Unit *u) { |
2115 | Unit *other; | |
2116 | Iterator i; | |
eef85c4a | 2117 | void *v; |
3ecaa09b LP |
2118 | |
2119 | assert(u); | |
2120 | ||
eef85c4a | 2121 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_TRIGGERED_BY], i) |
3ecaa09b LP |
2122 | if (UNIT_VTABLE(other)->trigger_notify) |
2123 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2124 | } | |
2125 | ||
915b1d01 | 2126 | static int unit_log_resources(Unit *u) { |
bc40a20e LP |
2127 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + _CGROUP_IO_ACCOUNTING_METRIC_MAX + 4]; |
2128 | bool any_traffic = false, have_ip_accounting = false, any_io = false, have_io_accounting = false; | |
2129 | _cleanup_free_ char *igress = NULL, *egress = NULL, *rr = NULL, *wr = NULL; | |
915b1d01 | 2130 | size_t n_message_parts = 0, n_iovec = 0; |
bc40a20e | 2131 | char* message_parts[1 + 2 + 2 + 1], *t; |
915b1d01 LP |
2132 | nsec_t nsec = NSEC_INFINITY; |
2133 | CGroupIPAccountingMetric m; | |
2134 | size_t i; | |
2135 | int r; | |
2136 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2137 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2138 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2139 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2140 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2141 | }; | |
bc40a20e LP |
2142 | const char* const io_fields[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
2143 | [CGROUP_IO_READ_BYTES] = "IO_METRIC_READ_BYTES", | |
2144 | [CGROUP_IO_WRITE_BYTES] = "IO_METRIC_WRITE_BYTES", | |
2145 | [CGROUP_IO_READ_OPERATIONS] = "IO_METRIC_READ_OPERATIONS", | |
2146 | [CGROUP_IO_WRITE_OPERATIONS] = "IO_METRIC_WRITE_OPERATIONS", | |
2147 | }; | |
915b1d01 LP |
2148 | |
2149 | assert(u); | |
2150 | ||
2151 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2152 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2153 | * information and the complete data in structured fields. */ | |
2154 | ||
2155 | (void) unit_get_cpu_usage(u, &nsec); | |
2156 | if (nsec != NSEC_INFINITY) { | |
2157 | char buf[FORMAT_TIMESPAN_MAX] = ""; | |
2158 | ||
2159 | /* Format the CPU time for inclusion in the structured log message */ | |
2160 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2161 | r = log_oom(); | |
2162 | goto finish; | |
2163 | } | |
2164 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2165 | ||
2166 | /* Format the CPU time for inclusion in the human language message string */ | |
2167 | format_timespan(buf, sizeof(buf), nsec / NSEC_PER_USEC, USEC_PER_MSEC); | |
ec9d636b | 2168 | t = strjoin("consumed ", buf, " CPU time"); |
915b1d01 LP |
2169 | if (!t) { |
2170 | r = log_oom(); | |
2171 | goto finish; | |
2172 | } | |
2173 | ||
2174 | message_parts[n_message_parts++] = t; | |
2175 | } | |
2176 | ||
bc40a20e LP |
2177 | for (CGroupIOAccountingMetric k = 0; k < _CGROUP_IO_ACCOUNTING_METRIC_MAX; k++) { |
2178 | char buf[FORMAT_BYTES_MAX] = ""; | |
2179 | uint64_t value = UINT64_MAX; | |
2180 | ||
2181 | assert(io_fields[k]); | |
2182 | ||
2183 | (void) unit_get_io_accounting(u, k, k > 0, &value); | |
2184 | if (value == UINT64_MAX) | |
2185 | continue; | |
2186 | ||
2187 | have_io_accounting = true; | |
2188 | if (value > 0) | |
2189 | any_io = true; | |
2190 | ||
2191 | /* Format IO accounting data for inclusion in the structured log message */ | |
2192 | if (asprintf(&t, "%s=%" PRIu64, io_fields[k], value) < 0) { | |
2193 | r = log_oom(); | |
2194 | goto finish; | |
2195 | } | |
2196 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2197 | ||
2198 | /* Format the IO accounting data for inclusion in the human language message string, but only | |
2199 | * for the bytes counters (and not for the operations counters) */ | |
2200 | if (k == CGROUP_IO_READ_BYTES) { | |
2201 | assert(!rr); | |
2202 | rr = strjoin("read ", format_bytes(buf, sizeof(buf), value), " from disk"); | |
2203 | if (!rr) { | |
2204 | r = log_oom(); | |
2205 | goto finish; | |
2206 | } | |
2207 | } else if (k == CGROUP_IO_WRITE_BYTES) { | |
2208 | assert(!wr); | |
2209 | wr = strjoin("written ", format_bytes(buf, sizeof(buf), value), " to disk"); | |
2210 | if (!wr) { | |
2211 | r = log_oom(); | |
2212 | goto finish; | |
2213 | } | |
2214 | } | |
2215 | } | |
2216 | ||
2217 | if (have_io_accounting) { | |
2218 | if (any_io) { | |
2219 | if (rr) | |
2220 | message_parts[n_message_parts++] = TAKE_PTR(rr); | |
2221 | if (wr) | |
2222 | message_parts[n_message_parts++] = TAKE_PTR(wr); | |
2223 | ||
2224 | } else { | |
2225 | char *k; | |
2226 | ||
2227 | k = strdup("no IO"); | |
2228 | if (!k) { | |
2229 | r = log_oom(); | |
2230 | goto finish; | |
2231 | } | |
2232 | ||
2233 | message_parts[n_message_parts++] = k; | |
2234 | } | |
2235 | } | |
2236 | ||
915b1d01 LP |
2237 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
2238 | char buf[FORMAT_BYTES_MAX] = ""; | |
2239 | uint64_t value = UINT64_MAX; | |
2240 | ||
2241 | assert(ip_fields[m]); | |
2242 | ||
2243 | (void) unit_get_ip_accounting(u, m, &value); | |
2244 | if (value == UINT64_MAX) | |
2245 | continue; | |
82044702 LP |
2246 | |
2247 | have_ip_accounting = true; | |
a87b1faa LP |
2248 | if (value > 0) |
2249 | any_traffic = true; | |
915b1d01 LP |
2250 | |
2251 | /* Format IP accounting data for inclusion in the structured log message */ | |
2252 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2253 | r = log_oom(); | |
2254 | goto finish; | |
2255 | } | |
2256 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2257 | ||
2258 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2259 | * bytes counters (and not for the packets counters) */ | |
a87b1faa LP |
2260 | if (m == CGROUP_IP_INGRESS_BYTES) { |
2261 | assert(!igress); | |
ec9d636b | 2262 | igress = strjoin("received ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2263 | if (!igress) { |
2264 | r = log_oom(); | |
2265 | goto finish; | |
2266 | } | |
2267 | } else if (m == CGROUP_IP_EGRESS_BYTES) { | |
2268 | assert(!egress); | |
ec9d636b | 2269 | egress = strjoin("sent ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2270 | if (!egress) { |
2271 | r = log_oom(); | |
2272 | goto finish; | |
2273 | } | |
2274 | } | |
2275 | } | |
2276 | ||
82044702 LP |
2277 | if (have_ip_accounting) { |
2278 | if (any_traffic) { | |
2279 | if (igress) | |
2280 | message_parts[n_message_parts++] = TAKE_PTR(igress); | |
2281 | if (egress) | |
2282 | message_parts[n_message_parts++] = TAKE_PTR(egress); | |
a87b1faa | 2283 | |
82044702 LP |
2284 | } else { |
2285 | char *k; | |
915b1d01 | 2286 | |
82044702 LP |
2287 | k = strdup("no IP traffic"); |
2288 | if (!k) { | |
2289 | r = log_oom(); | |
2290 | goto finish; | |
2291 | } | |
2292 | ||
2293 | message_parts[n_message_parts++] = k; | |
2294 | } | |
915b1d01 LP |
2295 | } |
2296 | ||
2297 | /* Is there any accounting data available at all? */ | |
2298 | if (n_iovec == 0) { | |
2299 | r = 0; | |
2300 | goto finish; | |
2301 | } | |
2302 | ||
2303 | if (n_message_parts == 0) | |
a87b1faa | 2304 | t = strjoina("MESSAGE=", u->id, ": Completed."); |
915b1d01 LP |
2305 | else { |
2306 | _cleanup_free_ char *joined; | |
2307 | ||
2308 | message_parts[n_message_parts] = NULL; | |
2309 | ||
2310 | joined = strv_join(message_parts, ", "); | |
2311 | if (!joined) { | |
2312 | r = log_oom(); | |
2313 | goto finish; | |
2314 | } | |
2315 | ||
ec9d636b | 2316 | joined[0] = ascii_toupper(joined[0]); |
a87b1faa | 2317 | t = strjoina("MESSAGE=", u->id, ": ", joined, "."); |
915b1d01 LP |
2318 | } |
2319 | ||
2320 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2321 | * and hence don't increase n_iovec for them */ | |
2322 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2323 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2324 | ||
2325 | t = strjoina(u->manager->unit_log_field, u->id); | |
2326 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2327 | ||
2328 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2329 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2330 | ||
2331 | log_struct_iovec(LOG_INFO, iovec, n_iovec + 4); | |
2332 | r = 0; | |
2333 | ||
2334 | finish: | |
2335 | for (i = 0; i < n_message_parts; i++) | |
2336 | free(message_parts[i]); | |
2337 | ||
2338 | for (i = 0; i < n_iovec; i++) | |
2339 | free(iovec[i].iov_base); | |
2340 | ||
2341 | return r; | |
2342 | ||
2343 | } | |
2344 | ||
adefcf28 LP |
2345 | static void unit_update_on_console(Unit *u) { |
2346 | bool b; | |
2347 | ||
2348 | assert(u); | |
2349 | ||
2350 | b = unit_needs_console(u); | |
2351 | if (u->on_console == b) | |
2352 | return; | |
2353 | ||
2354 | u->on_console = b; | |
2355 | if (b) | |
2356 | manager_ref_console(u->manager); | |
2357 | else | |
2358 | manager_unref_console(u->manager); | |
adefcf28 LP |
2359 | } |
2360 | ||
6eb65e7c LP |
2361 | static void unit_emit_audit_start(Unit *u) { |
2362 | assert(u); | |
2363 | ||
2364 | if (u->type != UNIT_SERVICE) | |
2365 | return; | |
2366 | ||
2367 | /* Write audit record if we have just finished starting up */ | |
2368 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); | |
2369 | u->in_audit = true; | |
2370 | } | |
2371 | ||
2372 | static void unit_emit_audit_stop(Unit *u, UnitActiveState state) { | |
2373 | assert(u); | |
2374 | ||
2375 | if (u->type != UNIT_SERVICE) | |
2376 | return; | |
2377 | ||
2378 | if (u->in_audit) { | |
2379 | /* Write audit record if we have just finished shutting down */ | |
2380 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, state == UNIT_INACTIVE); | |
2381 | u->in_audit = false; | |
2382 | } else { | |
2383 | /* Hmm, if there was no start record written write it now, so that we always have a nice pair */ | |
2384 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, state == UNIT_INACTIVE); | |
2385 | ||
2386 | if (state == UNIT_INACTIVE) | |
2387 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); | |
2388 | } | |
2389 | } | |
2390 | ||
16c74914 LP |
2391 | static bool unit_process_job(Job *j, UnitActiveState ns, UnitNotifyFlags flags) { |
2392 | bool unexpected = false; | |
2393 | ||
2394 | assert(j); | |
2395 | ||
2396 | if (j->state == JOB_WAITING) | |
2397 | ||
2398 | /* So we reached a different state for this job. Let's see if we can run it now if it failed previously | |
2399 | * due to EAGAIN. */ | |
2400 | job_add_to_run_queue(j); | |
2401 | ||
2402 | /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and | |
2403 | * hence needs to invalidate jobs. */ | |
2404 | ||
2405 | switch (j->type) { | |
2406 | ||
2407 | case JOB_START: | |
2408 | case JOB_VERIFY_ACTIVE: | |
2409 | ||
2410 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
2411 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2412 | else if (j->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
2413 | unexpected = true; | |
2414 | ||
2415 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2416 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2417 | } | |
2418 | ||
2419 | break; | |
2420 | ||
2421 | case JOB_RELOAD: | |
2422 | case JOB_RELOAD_OR_START: | |
2423 | case JOB_TRY_RELOAD: | |
2424 | ||
2425 | if (j->state == JOB_RUNNING) { | |
2426 | if (ns == UNIT_ACTIVE) | |
2427 | job_finish_and_invalidate(j, (flags & UNIT_NOTIFY_RELOAD_FAILURE) ? JOB_FAILED : JOB_DONE, true, false); | |
2428 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { | |
2429 | unexpected = true; | |
2430 | ||
2431 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2432 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2433 | } | |
2434 | } | |
2435 | ||
2436 | break; | |
2437 | ||
2438 | case JOB_STOP: | |
2439 | case JOB_RESTART: | |
2440 | case JOB_TRY_RESTART: | |
2441 | ||
2442 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2443 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2444 | else if (j->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
2445 | unexpected = true; | |
2446 | job_finish_and_invalidate(j, JOB_FAILED, true, false); | |
2447 | } | |
2448 | ||
2449 | break; | |
2450 | ||
2451 | default: | |
2452 | assert_not_reached("Job type unknown"); | |
2453 | } | |
2454 | ||
2455 | return unexpected; | |
2456 | } | |
2457 | ||
2ad2e41a | 2458 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, UnitNotifyFlags flags) { |
429926e9 | 2459 | const char *reason; |
8559b3b7 | 2460 | Manager *m; |
a096ed36 | 2461 | |
87f0e418 LP |
2462 | assert(u); |
2463 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2464 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2465 | |
8559b3b7 LP |
2466 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2467 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2468 | * remounted this function will be called too! */ | |
87f0e418 | 2469 | |
546ac4f0 MS |
2470 | m = u->manager; |
2471 | ||
3c4832ad LP |
2472 | /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in |
2473 | * the bus queue, so that any job change signal queued will force out the unit change signal first. */ | |
2474 | unit_add_to_dbus_queue(u); | |
2475 | ||
f755e3b7 | 2476 | /* Update timestamps for state changes */ |
2c289ea8 | 2477 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2478 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2479 | |
bdbf9951 | 2480 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2481 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2482 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2483 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2484 | |
2485 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2486 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2487 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2488 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2489 | } |
87f0e418 | 2490 | |
865cc19a | 2491 | /* Keep track of failed units */ |
8724defe | 2492 | (void) manager_update_failed_units(m, u, ns == UNIT_FAILED); |
f755e3b7 | 2493 | |
d3070fbd LP |
2494 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2495 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
efdb0237 | 2496 | unit_prune_cgroup(u); |
d3070fbd LP |
2497 | unit_unlink_state_files(u); |
2498 | } | |
fb385181 | 2499 | |
adefcf28 | 2500 | unit_update_on_console(u); |
7ed9f6cd | 2501 | |
2c289ea8 | 2502 | if (!MANAGER_IS_RELOADING(m)) { |
a1c7334b LP |
2503 | bool unexpected; |
2504 | ||
2505 | /* Let's propagate state changes to the job */ | |
2506 | if (u->job) | |
2507 | unexpected = unit_process_job(u->job, ns, flags); | |
2508 | else | |
2509 | unexpected = true; | |
f3bff0eb | 2510 | |
a1c7334b LP |
2511 | /* If this state change happened without being requested by a job, then let's retroactively start or |
2512 | * stop dependencies. We skip that step when deserializing, since we don't want to create any | |
2513 | * additional jobs just because something is already activated. */ | |
bdbf9951 LP |
2514 | |
2515 | if (unexpected) { | |
2516 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2517 | retroactively_start_dependencies(u); | |
2518 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2519 | retroactively_stop_dependencies(u); | |
2520 | } | |
5de9682c | 2521 | |
cd0504d0 | 2522 | /* stop unneeded units regardless if going down was expected or not */ |
a3c1168a | 2523 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
cd0504d0 MS |
2524 | check_unneeded_dependencies(u); |
2525 | ||
bdbf9951 | 2526 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2527 | log_unit_debug(u, "Unit entered failed state."); |
2ad2e41a LP |
2528 | |
2529 | if (!(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
2530 | unit_start_on_failure(u); | |
cd6d0a45 | 2531 | } |
e537352b | 2532 | |
256f65d0 LP |
2533 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns) && !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
2534 | /* This unit just finished starting up */ | |
3b2775c5 | 2535 | |
6eb65e7c | 2536 | unit_emit_audit_start(u); |
546ac4f0 | 2537 | manager_send_unit_plymouth(m, u); |
256f65d0 | 2538 | } |
bdbf9951 | 2539 | |
256f65d0 | 2540 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && !UNIT_IS_INACTIVE_OR_FAILED(os)) { |
915b1d01 | 2541 | /* This unit just stopped/failed. */ |
256f65d0 | 2542 | |
6eb65e7c | 2543 | unit_emit_audit_stop(u, ns); |
915b1d01 | 2544 | unit_log_resources(u); |
cd6d0a45 | 2545 | } |
f278026d LP |
2546 | } |
2547 | ||
31dc1ca3 LP |
2548 | manager_recheck_journal(m); |
2549 | manager_recheck_dbus(m); | |
e63ebf71 | 2550 | |
3ecaa09b | 2551 | unit_trigger_notify(u); |
3b2775c5 | 2552 | |
8724defe | 2553 | if (!MANAGER_IS_RELOADING(m)) { |
8559b3b7 | 2554 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ |
fda09318 | 2555 | unit_submit_to_stop_when_unneeded_queue(u); |
c1e1601e | 2556 | |
8559b3b7 LP |
2557 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens when |
2558 | * something BindsTo= to a Type=oneshot unit, as these units go directly from starting to inactive, | |
ff502445 LP |
2559 | * without ever entering started.) */ |
2560 | unit_check_binds_to(u); | |
53c35a76 | 2561 | |
429926e9 TR |
2562 | if (os != UNIT_FAILED && ns == UNIT_FAILED) { |
2563 | reason = strjoina("unit ", u->id, " failed"); | |
36c4dc08 | 2564 | emergency_action(m, u->failure_action, 0, u->reboot_arg, unit_failure_action_exit_status(u), reason); |
429926e9 TR |
2565 | } else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) { |
2566 | reason = strjoina("unit ", u->id, " succeeded"); | |
36c4dc08 | 2567 | emergency_action(m, u->success_action, 0, u->reboot_arg, unit_success_action_exit_status(u), reason); |
429926e9 | 2568 | } |
ff502445 LP |
2569 | } |
2570 | ||
701cc384 | 2571 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2572 | } |
2573 | ||
f75f613d | 2574 | int unit_watch_pid(Unit *u, pid_t pid, bool exclusive) { |
62a76913 | 2575 | int r; |
a911bb9a | 2576 | |
87f0e418 | 2577 | assert(u); |
62a76913 | 2578 | assert(pid_is_valid(pid)); |
87f0e418 | 2579 | |
62a76913 | 2580 | /* Watch a specific PID */ |
5ba6985b | 2581 | |
f75f613d FB |
2582 | /* Caller might be sure that this PID belongs to this unit only. Let's take this |
2583 | * opportunity to remove any stalled references to this PID as they can be created | |
2584 | * easily (when watching a process which is not our direct child). */ | |
2585 | if (exclusive) | |
2586 | manager_unwatch_pid(u->manager, pid); | |
2587 | ||
d5099efc | 2588 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2589 | if (r < 0) |
2590 | return r; | |
2591 | ||
62a76913 | 2592 | r = hashmap_ensure_allocated(&u->manager->watch_pids, NULL); |
a911bb9a LP |
2593 | if (r < 0) |
2594 | return r; | |
2595 | ||
62a76913 LP |
2596 | /* First try, let's add the unit keyed by "pid". */ |
2597 | r = hashmap_put(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2598 | if (r == -EEXIST) { | |
2599 | Unit **array; | |
2600 | bool found = false; | |
2601 | size_t n = 0; | |
05e343b7 | 2602 | |
62a76913 LP |
2603 | /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points |
2604 | * to an array of Units rather than just a Unit), lists us already. */ | |
a911bb9a | 2605 | |
62a76913 LP |
2606 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); |
2607 | if (array) | |
2608 | for (; array[n]; n++) | |
2609 | if (array[n] == u) | |
2610 | found = true; | |
a911bb9a | 2611 | |
62a76913 LP |
2612 | if (found) /* Found it already? if so, do nothing */ |
2613 | r = 0; | |
2614 | else { | |
2615 | Unit **new_array; | |
2616 | ||
2617 | /* Allocate a new array */ | |
2618 | new_array = new(Unit*, n + 2); | |
2619 | if (!new_array) | |
2620 | return -ENOMEM; | |
2621 | ||
2622 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2623 | new_array[n] = u; | |
2624 | new_array[n+1] = NULL; | |
2625 | ||
2626 | /* Add or replace the old array */ | |
2627 | r = hashmap_replace(u->manager->watch_pids, PID_TO_PTR(-pid), new_array); | |
2628 | if (r < 0) { | |
2629 | free(new_array); | |
2630 | return r; | |
2631 | } | |
2632 | ||
2633 | free(array); | |
2634 | } | |
2635 | } else if (r < 0) | |
2636 | return r; | |
2637 | ||
2638 | r = set_put(u->pids, PID_TO_PTR(pid)); | |
2639 | if (r < 0) | |
2640 | return r; | |
2641 | ||
2642 | return 0; | |
87f0e418 LP |
2643 | } |
2644 | ||
2645 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
62a76913 LP |
2646 | Unit **array; |
2647 | ||
87f0e418 | 2648 | assert(u); |
62a76913 LP |
2649 | assert(pid_is_valid(pid)); |
2650 | ||
2651 | /* First let's drop the unit in case it's keyed as "pid". */ | |
2652 | (void) hashmap_remove_value(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2653 | ||
2654 | /* Then, let's also drop the unit, in case it's in the array keyed by -pid */ | |
2655 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); | |
2656 | if (array) { | |
2657 | size_t n, m = 0; | |
2658 | ||
2659 | /* Let's iterate through the array, dropping our own entry */ | |
2660 | for (n = 0; array[n]; n++) | |
2661 | if (array[n] != u) | |
2662 | array[m++] = array[n]; | |
2663 | array[m] = NULL; | |
2664 | ||
2665 | if (m == 0) { | |
2666 | /* The array is now empty, remove the entire entry */ | |
2667 | assert(hashmap_remove(u->manager->watch_pids, PID_TO_PTR(-pid)) == array); | |
2668 | free(array); | |
2669 | } | |
2670 | } | |
87f0e418 | 2671 | |
fea72cc0 | 2672 | (void) set_remove(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2673 | } |
2674 | ||
bd44e61b LP |
2675 | void unit_unwatch_all_pids(Unit *u) { |
2676 | assert(u); | |
2677 | ||
2678 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2679 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2680 | |
efdb0237 | 2681 | u->pids = set_free(u->pids); |
a911bb9a LP |
2682 | } |
2683 | ||
50be4f4a LP |
2684 | static void unit_tidy_watch_pids(Unit *u) { |
2685 | pid_t except1, except2; | |
a911bb9a LP |
2686 | Iterator i; |
2687 | void *e; | |
2688 | ||
2689 | assert(u); | |
2690 | ||
2691 | /* Cleans dead PIDs from our list */ | |
2692 | ||
50be4f4a LP |
2693 | except1 = unit_main_pid(u); |
2694 | except2 = unit_control_pid(u); | |
2695 | ||
a911bb9a | 2696 | SET_FOREACH(e, u->pids, i) { |
fea72cc0 | 2697 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2698 | |
2699 | if (pid == except1 || pid == except2) | |
2700 | continue; | |
2701 | ||
9f5650ae | 2702 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2703 | unit_unwatch_pid(u, pid); |
a911bb9a | 2704 | } |
87f0e418 LP |
2705 | } |
2706 | ||
50be4f4a LP |
2707 | static int on_rewatch_pids_event(sd_event_source *s, void *userdata) { |
2708 | Unit *u = userdata; | |
2709 | ||
2710 | assert(s); | |
2711 | assert(u); | |
2712 | ||
2713 | unit_tidy_watch_pids(u); | |
2714 | unit_watch_all_pids(u); | |
2715 | ||
2716 | /* If the PID set is empty now, then let's finish this off. */ | |
2717 | unit_synthesize_cgroup_empty_event(u); | |
2718 | ||
2719 | return 0; | |
2720 | } | |
2721 | ||
2722 | int unit_enqueue_rewatch_pids(Unit *u) { | |
2723 | int r; | |
2724 | ||
2725 | assert(u); | |
2726 | ||
2727 | if (!u->cgroup_path) | |
2728 | return -ENOENT; | |
2729 | ||
2730 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
2731 | if (r < 0) | |
2732 | return r; | |
2733 | if (r > 0) /* On unified we can use proper notifications */ | |
2734 | return 0; | |
2735 | ||
2736 | /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new | |
2737 | * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it | |
2738 | * involves issuing kill(pid, 0) on all processes we watch. */ | |
2739 | ||
2740 | if (!u->rewatch_pids_event_source) { | |
2741 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
2742 | ||
2743 | r = sd_event_add_defer(u->manager->event, &s, on_rewatch_pids_event, u); | |
2744 | if (r < 0) | |
2745 | return log_error_errno(r, "Failed to allocate event source for tidying watched PIDs: %m"); | |
2746 | ||
2747 | r = sd_event_source_set_priority(s, SD_EVENT_PRIORITY_IDLE); | |
2748 | if (r < 0) | |
2749 | return log_error_errno(r, "Failed to adjust priority of event source for tidying watched PIDs: m"); | |
2750 | ||
2751 | (void) sd_event_source_set_description(s, "tidy-watch-pids"); | |
2752 | ||
2753 | u->rewatch_pids_event_source = TAKE_PTR(s); | |
2754 | } | |
2755 | ||
2756 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_ONESHOT); | |
2757 | if (r < 0) | |
2758 | return log_error_errno(r, "Failed to enable event source for tidying watched PIDs: %m"); | |
2759 | ||
2760 | return 0; | |
2761 | } | |
2762 | ||
2763 | void unit_dequeue_rewatch_pids(Unit *u) { | |
2764 | int r; | |
2765 | assert(u); | |
2766 | ||
2767 | if (!u->rewatch_pids_event_source) | |
2768 | return; | |
2769 | ||
2770 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_OFF); | |
2771 | if (r < 0) | |
2772 | log_warning_errno(r, "Failed to disable event source for tidying watched PIDs, ignoring: %m"); | |
2773 | ||
2774 | u->rewatch_pids_event_source = sd_event_source_unref(u->rewatch_pids_event_source); | |
2775 | } | |
2776 | ||
87f0e418 LP |
2777 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2778 | assert(u); | |
2779 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2780 | ||
2781 | switch (j) { | |
2782 | ||
2783 | case JOB_VERIFY_ACTIVE: | |
2784 | case JOB_START: | |
e0209d83 | 2785 | case JOB_NOP: |
f5869324 LP |
2786 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
2787 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueing | |
2788 | * jobs for it. */ | |
87f0e418 LP |
2789 | return true; |
2790 | ||
f5869324 LP |
2791 | case JOB_STOP: |
2792 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
2793 | * external events), hence it makes no sense to permit enqueing such a request either. */ | |
2794 | return !u->perpetual; | |
2795 | ||
87f0e418 LP |
2796 | case JOB_RESTART: |
2797 | case JOB_TRY_RESTART: | |
f5869324 | 2798 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
2799 | |
2800 | case JOB_RELOAD: | |
3282591d | 2801 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2802 | return unit_can_reload(u); |
2803 | ||
2804 | case JOB_RELOAD_OR_START: | |
2805 | return unit_can_reload(u) && unit_can_start(u); | |
2806 | ||
2807 | default: | |
2808 | assert_not_reached("Invalid job type"); | |
2809 | } | |
2810 | } | |
2811 | ||
f2341e0a LP |
2812 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2813 | assert(u); | |
d1fab3fe | 2814 | |
f2341e0a LP |
2815 | /* Only warn about some unit types */ |
2816 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2817 | return; | |
3f3cc397 | 2818 | |
f2341e0a LP |
2819 | if (streq_ptr(u->id, other)) |
2820 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2821 | else | |
2822 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2823 | } |
2824 | ||
eef85c4a LP |
2825 | static int unit_add_dependency_hashmap( |
2826 | Hashmap **h, | |
2827 | Unit *other, | |
2828 | UnitDependencyMask origin_mask, | |
2829 | UnitDependencyMask destination_mask) { | |
2830 | ||
2831 | UnitDependencyInfo info; | |
2832 | int r; | |
2833 | ||
2834 | assert(h); | |
2835 | assert(other); | |
2836 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2837 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2838 | assert(origin_mask > 0 || destination_mask > 0); | |
2839 | ||
2840 | r = hashmap_ensure_allocated(h, NULL); | |
2841 | if (r < 0) | |
2842 | return r; | |
2843 | ||
2844 | assert_cc(sizeof(void*) == sizeof(info)); | |
2845 | ||
2846 | info.data = hashmap_get(*h, other); | |
2847 | if (info.data) { | |
2848 | /* Entry already exists. Add in our mask. */ | |
2849 | ||
d94a24ca ZJS |
2850 | if (FLAGS_SET(origin_mask, info.origin_mask) && |
2851 | FLAGS_SET(destination_mask, info.destination_mask)) | |
eef85c4a LP |
2852 | return 0; /* NOP */ |
2853 | ||
2854 | info.origin_mask |= origin_mask; | |
2855 | info.destination_mask |= destination_mask; | |
2856 | ||
2857 | r = hashmap_update(*h, other, info.data); | |
2858 | } else { | |
2859 | info = (UnitDependencyInfo) { | |
2860 | .origin_mask = origin_mask, | |
2861 | .destination_mask = destination_mask, | |
2862 | }; | |
2863 | ||
2864 | r = hashmap_put(*h, other, info.data); | |
2865 | } | |
2866 | if (r < 0) | |
2867 | return r; | |
2868 | ||
2869 | return 1; | |
2870 | } | |
2871 | ||
2872 | int unit_add_dependency( | |
2873 | Unit *u, | |
2874 | UnitDependency d, | |
2875 | Unit *other, | |
2876 | bool add_reference, | |
2877 | UnitDependencyMask mask) { | |
87f0e418 LP |
2878 | |
2879 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2880 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 2881 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 2882 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 2883 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2884 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 2885 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 2886 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 2887 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 2888 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2889 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2890 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2891 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2892 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2893 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2894 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2895 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2896 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2897 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2898 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2899 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2900 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2901 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2902 | }; |
eef85c4a LP |
2903 | Unit *original_u = u, *original_other = other; |
2904 | int r; | |
87f0e418 LP |
2905 | |
2906 | assert(u); | |
2907 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2908 | assert(other); |
2909 | ||
9f151f29 LP |
2910 | u = unit_follow_merge(u); |
2911 | other = unit_follow_merge(other); | |
2912 | ||
87f0e418 LP |
2913 | /* We won't allow dependencies on ourselves. We will not |
2914 | * consider them an error however. */ | |
d1fab3fe | 2915 | if (u == other) { |
eef85c4a | 2916 | maybe_warn_about_dependency(original_u, original_other->id, d); |
87f0e418 | 2917 | return 0; |
d1fab3fe | 2918 | } |
87f0e418 | 2919 | |
eef85c4a LP |
2920 | if ((d == UNIT_BEFORE && other->type == UNIT_DEVICE) || |
2921 | (d == UNIT_AFTER && u->type == UNIT_DEVICE)) { | |
dd5e7000 ZJS |
2922 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
2923 | return 0; | |
2924 | } | |
2925 | ||
eef85c4a | 2926 | r = unit_add_dependency_hashmap(u->dependencies + d, other, mask, 0); |
613b411c | 2927 | if (r < 0) |
87f0e418 LP |
2928 | return r; |
2929 | ||
eef85c4a LP |
2930 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2931 | r = unit_add_dependency_hashmap(other->dependencies + inverse_table[d], u, 0, mask); | |
613b411c LP |
2932 | if (r < 0) |
2933 | return r; | |
2934 | } | |
2935 | ||
2936 | if (add_reference) { | |
eef85c4a | 2937 | r = unit_add_dependency_hashmap(u->dependencies + UNIT_REFERENCES, other, mask, 0); |
613b411c | 2938 | if (r < 0) |
5de9682c LP |
2939 | return r; |
2940 | ||
eef85c4a | 2941 | r = unit_add_dependency_hashmap(other->dependencies + UNIT_REFERENCED_BY, u, 0, mask); |
613b411c | 2942 | if (r < 0) |
701cc384 | 2943 | return r; |
613b411c | 2944 | } |
87f0e418 | 2945 | |
c1e1601e | 2946 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
2947 | return 0; |
2948 | } | |
0301abf4 | 2949 | |
eef85c4a | 2950 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
2c966c03 LP |
2951 | int r; |
2952 | ||
2953 | assert(u); | |
2954 | ||
eef85c4a | 2955 | r = unit_add_dependency(u, d, other, add_reference, mask); |
3f3cc397 | 2956 | if (r < 0) |
2c966c03 LP |
2957 | return r; |
2958 | ||
eef85c4a | 2959 | return unit_add_dependency(u, e, other, add_reference, mask); |
2c966c03 LP |
2960 | } |
2961 | ||
23e8c796 | 2962 | static int resolve_template(Unit *u, const char *name, char **buf, const char **ret) { |
7410616c | 2963 | int r; |
9e2f7c11 LP |
2964 | |
2965 | assert(u); | |
23e8c796 | 2966 | assert(name); |
7410616c LP |
2967 | assert(buf); |
2968 | assert(ret); | |
9e2f7c11 | 2969 | |
7410616c LP |
2970 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2971 | *buf = NULL; | |
2972 | *ret = name; | |
2973 | return 0; | |
9e2f7c11 LP |
2974 | } |
2975 | ||
ac155bb8 | 2976 | if (u->instance) |
7410616c | 2977 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 2978 | else { |
ae018d9b | 2979 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2980 | |
7410616c LP |
2981 | r = unit_name_to_prefix(u->id, &i); |
2982 | if (r < 0) | |
2983 | return r; | |
9e2f7c11 | 2984 | |
7410616c | 2985 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 2986 | } |
7410616c LP |
2987 | if (r < 0) |
2988 | return r; | |
9e2f7c11 | 2989 | |
7410616c LP |
2990 | *ret = *buf; |
2991 | return 0; | |
9e2f7c11 LP |
2992 | } |
2993 | ||
35d8c19a | 2994 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 2995 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
2996 | Unit *other; |
2997 | int r; | |
2998 | ||
9e2f7c11 | 2999 | assert(u); |
35d8c19a | 3000 | assert(name); |
09b6b09f | 3001 | |
23e8c796 | 3002 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3003 | if (r < 0) |
3004 | return r; | |
09b6b09f | 3005 | |
35d8c19a | 3006 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
8afbb8e1 LP |
3007 | if (r < 0) |
3008 | return r; | |
9e2f7c11 | 3009 | |
eef85c4a | 3010 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
3011 | } |
3012 | ||
5a724170 | 3013 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3014 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
3015 | Unit *other; |
3016 | int r; | |
2c966c03 LP |
3017 | |
3018 | assert(u); | |
5a724170 | 3019 | assert(name); |
2c966c03 | 3020 | |
23e8c796 | 3021 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3022 | if (r < 0) |
3023 | return r; | |
2c966c03 | 3024 | |
5a724170 | 3025 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
3f3cc397 | 3026 | if (r < 0) |
68eda4bd | 3027 | return r; |
2c966c03 | 3028 | |
eef85c4a | 3029 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
3030 | } |
3031 | ||
0301abf4 | 3032 | int set_unit_path(const char *p) { |
0301abf4 | 3033 | /* This is mostly for debug purposes */ |
cbe46ead | 3034 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 3035 | return -errno; |
0301abf4 LP |
3036 | |
3037 | return 0; | |
3038 | } | |
88066b3a | 3039 | |
ea430986 | 3040 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
3041 | assert(u); |
3042 | ||
ac155bb8 | 3043 | if (!u->id) |
04ade7d2 LP |
3044 | return NULL; |
3045 | ||
48899192 | 3046 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
3047 | } |
3048 | ||
4b58153d LP |
3049 | char *unit_dbus_path_invocation_id(Unit *u) { |
3050 | assert(u); | |
3051 | ||
3052 | if (sd_id128_is_null(u->invocation_id)) | |
3053 | return NULL; | |
3054 | ||
3055 | return unit_dbus_path_from_name(u->invocation_id_string); | |
3056 | } | |
3057 | ||
d79200e2 LP |
3058 | int unit_set_slice(Unit *u, Unit *slice) { |
3059 | assert(u); | |
3060 | assert(slice); | |
3061 | ||
3062 | /* Sets the unit slice if it has not been set before. Is extra | |
3063 | * careful, to only allow this for units that actually have a | |
3064 | * cgroup context. Also, we don't allow to set this for slices | |
3065 | * (since the parent slice is derived from the name). Make | |
3066 | * sure the unit we set is actually a slice. */ | |
3067 | ||
3068 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3069 | return -EOPNOTSUPP; | |
3070 | ||
3071 | if (u->type == UNIT_SLICE) | |
3072 | return -EINVAL; | |
3073 | ||
102ef982 LP |
3074 | if (unit_active_state(u) != UNIT_INACTIVE) |
3075 | return -EBUSY; | |
3076 | ||
d79200e2 LP |
3077 | if (slice->type != UNIT_SLICE) |
3078 | return -EINVAL; | |
3079 | ||
efdb0237 LP |
3080 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
3081 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
3082 | return -EPERM; | |
3083 | ||
d79200e2 LP |
3084 | if (UNIT_DEREF(u->slice) == slice) |
3085 | return 0; | |
3086 | ||
99e66921 TH |
3087 | /* Disallow slice changes if @u is already bound to cgroups */ |
3088 | if (UNIT_ISSET(u->slice) && u->cgroup_realized) | |
d79200e2 LP |
3089 | return -EBUSY; |
3090 | ||
7f7d01ed | 3091 | unit_ref_set(&u->slice, u, slice); |
d79200e2 LP |
3092 | return 1; |
3093 | } | |
3094 | ||
3095 | int unit_set_default_slice(Unit *u) { | |
a8833944 | 3096 | const char *slice_name; |
a016b922 LP |
3097 | Unit *slice; |
3098 | int r; | |
3099 | ||
3100 | assert(u); | |
3101 | ||
9444b1f2 | 3102 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
3103 | return 0; |
3104 | ||
a8833944 LP |
3105 | if (u->instance) { |
3106 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 3107 | |
a8833944 LP |
3108 | /* Implicitly place all instantiated units in their |
3109 | * own per-template slice */ | |
3110 | ||
7410616c LP |
3111 | r = unit_name_to_prefix(u->id, &prefix); |
3112 | if (r < 0) | |
3113 | return r; | |
a8833944 LP |
3114 | |
3115 | /* The prefix is already escaped, but it might include | |
3116 | * "-" which has a special meaning for slice units, | |
3117 | * hence escape it here extra. */ | |
7410616c | 3118 | escaped = unit_name_escape(prefix); |
a8833944 LP |
3119 | if (!escaped) |
3120 | return -ENOMEM; | |
3121 | ||
463d0d15 | 3122 | if (MANAGER_IS_SYSTEM(u->manager)) |
00e7b3c8 | 3123 | slice_name = strjoina("system-", escaped, ".slice"); |
a8833944 | 3124 | else |
00e7b3c8 | 3125 | slice_name = strjoina(escaped, ".slice"); |
a8833944 LP |
3126 | } else |
3127 | slice_name = | |
463d0d15 | 3128 | MANAGER_IS_SYSTEM(u->manager) && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
3129 | ? SPECIAL_SYSTEM_SLICE |
3130 | : SPECIAL_ROOT_SLICE; | |
3131 | ||
3132 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
3133 | if (r < 0) |
3134 | return r; | |
3135 | ||
d79200e2 | 3136 | return unit_set_slice(u, slice); |
a016b922 LP |
3137 | } |
3138 | ||
9444b1f2 LP |
3139 | const char *unit_slice_name(Unit *u) { |
3140 | assert(u); | |
3141 | ||
3142 | if (!UNIT_ISSET(u->slice)) | |
3143 | return NULL; | |
3144 | ||
3145 | return UNIT_DEREF(u->slice)->id; | |
3146 | } | |
3147 | ||
f6ff8c29 | 3148 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 3149 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
3150 | int r; |
3151 | ||
3152 | assert(u); | |
3153 | assert(type); | |
3154 | assert(_found); | |
3155 | ||
7410616c LP |
3156 | r = unit_name_change_suffix(u->id, type, &t); |
3157 | if (r < 0) | |
3158 | return r; | |
3159 | if (unit_has_name(u, t)) | |
3160 | return -EINVAL; | |
f6ff8c29 | 3161 | |
ac155bb8 | 3162 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3163 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3164 | return r; |
3165 | } | |
3166 | ||
bbc29086 DM |
3167 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
3168 | const char *name, *old_owner, *new_owner; | |
3169 | Unit *u = userdata; | |
3170 | int r; | |
3171 | ||
3172 | assert(message); | |
3173 | assert(u); | |
3174 | ||
3175 | r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner); | |
3176 | if (r < 0) { | |
3177 | bus_log_parse_error(r); | |
3178 | return 0; | |
3179 | } | |
3180 | ||
a8ea93a5 LP |
3181 | old_owner = empty_to_null(old_owner); |
3182 | new_owner = empty_to_null(new_owner); | |
b0076268 | 3183 | |
bbc29086 DM |
3184 | if (UNIT_VTABLE(u)->bus_name_owner_change) |
3185 | UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); | |
3186 | ||
3187 | return 0; | |
3188 | } | |
3189 | ||
9806e87d LP |
3190 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3191 | const char *match; | |
bbc29086 | 3192 | |
9806e87d LP |
3193 | assert(u); |
3194 | assert(bus); | |
3195 | assert(name); | |
bbc29086 DM |
3196 | |
3197 | if (u->match_bus_slot) | |
3198 | return -EBUSY; | |
3199 | ||
9806e87d | 3200 | match = strjoina("type='signal'," |
81d62103 ZJS |
3201 | "sender='org.freedesktop.DBus'," |
3202 | "path='/org/freedesktop/DBus'," | |
3203 | "interface='org.freedesktop.DBus'," | |
3204 | "member='NameOwnerChanged'," | |
3205 | "arg0='", name, "'"); | |
bbc29086 | 3206 | |
75152a4d | 3207 | return sd_bus_add_match_async(bus, &u->match_bus_slot, match, signal_name_owner_changed, NULL, u); |
bbc29086 DM |
3208 | } |
3209 | ||
05e343b7 | 3210 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3211 | int r; |
3212 | ||
05e343b7 LP |
3213 | assert(u); |
3214 | assert(name); | |
3215 | ||
3216 | /* Watch a specific name on the bus. We only support one unit | |
3217 | * watching each name for now. */ | |
3218 | ||
bbc29086 DM |
3219 | if (u->manager->api_bus) { |
3220 | /* If the bus is already available, install the match directly. | |
3221 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3222 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3223 | if (r < 0) |
8ea823b6 | 3224 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3225 | } |
3226 | ||
3227 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3228 | if (r < 0) { | |
3229 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3230 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); | |
3231 | } | |
3232 | ||
3233 | return 0; | |
05e343b7 LP |
3234 | } |
3235 | ||
3236 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3237 | assert(u); | |
3238 | assert(name); | |
3239 | ||
8367fea5 | 3240 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3241 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
05e343b7 LP |
3242 | } |
3243 | ||
a16e1123 LP |
3244 | bool unit_can_serialize(Unit *u) { |
3245 | assert(u); | |
3246 | ||
3247 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
3248 | } | |
3249 | ||
d68c645b | 3250 | static int serialize_cgroup_mask(FILE *f, const char *key, CGroupMask mask) { |
8b108bd0 | 3251 | _cleanup_free_ char *s = NULL; |
d68c645b | 3252 | int r; |
8b108bd0 FB |
3253 | |
3254 | assert(f); | |
3255 | assert(key); | |
3256 | ||
d68c645b LP |
3257 | if (mask == 0) |
3258 | return 0; | |
3259 | ||
3260 | r = cg_mask_to_string(mask, &s); | |
3261 | if (r < 0) | |
3262 | return log_error_errno(r, "Failed to format cgroup mask: %m"); | |
3263 | ||
3264 | return serialize_item(f, key, s); | |
8b108bd0 FB |
3265 | } |
3266 | ||
b82f71c7 | 3267 | static const char *const ip_accounting_metric_field[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { |
6b659ed8 LP |
3268 | [CGROUP_IP_INGRESS_BYTES] = "ip-accounting-ingress-bytes", |
3269 | [CGROUP_IP_INGRESS_PACKETS] = "ip-accounting-ingress-packets", | |
3270 | [CGROUP_IP_EGRESS_BYTES] = "ip-accounting-egress-bytes", | |
3271 | [CGROUP_IP_EGRESS_PACKETS] = "ip-accounting-egress-packets", | |
3272 | }; | |
3273 | ||
fbe14fc9 LP |
3274 | static const char *const io_accounting_metric_field_base[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
3275 | [CGROUP_IO_READ_BYTES] = "io-accounting-read-bytes-base", | |
3276 | [CGROUP_IO_WRITE_BYTES] = "io-accounting-write-bytes-base", | |
3277 | [CGROUP_IO_READ_OPERATIONS] = "io-accounting-read-operations-base", | |
3278 | [CGROUP_IO_WRITE_OPERATIONS] = "io-accounting-write-operations-base", | |
3279 | }; | |
3280 | ||
3281 | static const char *const io_accounting_metric_field_last[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { | |
3282 | [CGROUP_IO_READ_BYTES] = "io-accounting-read-bytes-last", | |
3283 | [CGROUP_IO_WRITE_BYTES] = "io-accounting-write-bytes-last", | |
3284 | [CGROUP_IO_READ_OPERATIONS] = "io-accounting-read-operations-last", | |
3285 | [CGROUP_IO_WRITE_OPERATIONS] = "io-accounting-write-operations-last", | |
3286 | }; | |
3287 | ||
6b78f9b4 | 3288 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
6b659ed8 | 3289 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3290 | int r; |
3291 | ||
3292 | assert(u); | |
3293 | assert(f); | |
3294 | assert(fds); | |
3295 | ||
9bdb98c5 | 3296 | if (unit_can_serialize(u)) { |
9bdb98c5 | 3297 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
3298 | if (r < 0) |
3299 | return r; | |
e0209d83 MS |
3300 | } |
3301 | ||
d68c645b | 3302 | (void) serialize_dual_timestamp(f, "state-change-timestamp", &u->state_change_timestamp); |
a483fb59 | 3303 | |
d68c645b LP |
3304 | (void) serialize_dual_timestamp(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
3305 | (void) serialize_dual_timestamp(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
3306 | (void) serialize_dual_timestamp(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
3307 | (void) serialize_dual_timestamp(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
a483fb59 | 3308 | |
d68c645b LP |
3309 | (void) serialize_dual_timestamp(f, "condition-timestamp", &u->condition_timestamp); |
3310 | (void) serialize_dual_timestamp(f, "assert-timestamp", &u->assert_timestamp); | |
2791a8f8 | 3311 | |
ac155bb8 | 3312 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
d68c645b | 3313 | (void) serialize_bool(f, "condition-result", u->condition_result); |
10717a1a | 3314 | |
59fccdc5 | 3315 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
d68c645b | 3316 | (void) serialize_bool(f, "assert-result", u->assert_result); |
59fccdc5 | 3317 | |
d68c645b LP |
3318 | (void) serialize_bool(f, "transient", u->transient); |
3319 | (void) serialize_bool(f, "in-audit", u->in_audit); | |
fe700f46 | 3320 | |
d68c645b LP |
3321 | (void) serialize_bool(f, "exported-invocation-id", u->exported_invocation_id); |
3322 | (void) serialize_bool(f, "exported-log-level-max", u->exported_log_level_max); | |
3323 | (void) serialize_bool(f, "exported-log-extra-fields", u->exported_log_extra_fields); | |
3324 | (void) serialize_bool(f, "exported-log-rate-limit-interval", u->exported_log_rate_limit_interval); | |
3325 | (void) serialize_bool(f, "exported-log-rate-limit-burst", u->exported_log_rate_limit_burst); | |
0e699122 | 3326 | |
d68c645b | 3327 | (void) serialize_item_format(f, "cpu-usage-base", "%" PRIu64, u->cpu_usage_base); |
fe700f46 | 3328 | if (u->cpu_usage_last != NSEC_INFINITY) |
d68c645b | 3329 | (void) serialize_item_format(f, "cpu-usage-last", "%" PRIu64, u->cpu_usage_last); |
c2756a68 | 3330 | |
afcfaa69 LP |
3331 | if (u->oom_kill_last > 0) |
3332 | (void) serialize_item_format(f, "oom-kill-last", "%" PRIu64, u->oom_kill_last); | |
3333 | ||
fbe14fc9 LP |
3334 | for (CGroupIOAccountingMetric im = 0; im < _CGROUP_IO_ACCOUNTING_METRIC_MAX; im++) { |
3335 | (void) serialize_item_format(f, io_accounting_metric_field_base[im], "%" PRIu64, u->io_accounting_base[im]); | |
3336 | ||
3337 | if (u->io_accounting_last[im] != UINT64_MAX) | |
3338 | (void) serialize_item_format(f, io_accounting_metric_field_last[im], "%" PRIu64, u->io_accounting_last[im]); | |
3339 | } | |
3340 | ||
c2756a68 | 3341 | if (u->cgroup_path) |
d68c645b LP |
3342 | (void) serialize_item(f, "cgroup", u->cgroup_path); |
3343 | ||
3344 | (void) serialize_bool(f, "cgroup-realized", u->cgroup_realized); | |
3345 | (void) serialize_cgroup_mask(f, "cgroup-realized-mask", u->cgroup_realized_mask); | |
3346 | (void) serialize_cgroup_mask(f, "cgroup-enabled-mask", u->cgroup_enabled_mask); | |
3347 | (void) serialize_cgroup_mask(f, "cgroup-invalidated-mask", u->cgroup_invalidated_mask); | |
c2756a68 | 3348 | |
00d9ef85 | 3349 | if (uid_is_valid(u->ref_uid)) |
d68c645b | 3350 | (void) serialize_item_format(f, "ref-uid", UID_FMT, u->ref_uid); |
00d9ef85 | 3351 | if (gid_is_valid(u->ref_gid)) |
d68c645b | 3352 | (void) serialize_item_format(f, "ref-gid", GID_FMT, u->ref_gid); |
00d9ef85 | 3353 | |
4b58153d | 3354 | if (!sd_id128_is_null(u->invocation_id)) |
d68c645b | 3355 | (void) serialize_item_format(f, "invocation-id", SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(u->invocation_id)); |
4b58153d | 3356 | |
05a98afd LP |
3357 | bus_track_serialize(u->bus_track, f, "ref"); |
3358 | ||
6b659ed8 LP |
3359 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
3360 | uint64_t v; | |
3361 | ||
3362 | r = unit_get_ip_accounting(u, m, &v); | |
3363 | if (r >= 0) | |
d68c645b | 3364 | (void) serialize_item_format(f, ip_accounting_metric_field[m], "%" PRIu64, v); |
6b659ed8 LP |
3365 | } |
3366 | ||
613b411c LP |
3367 | if (serialize_jobs) { |
3368 | if (u->job) { | |
d68c645b | 3369 | fputs("job\n", f); |
05a98afd | 3370 | job_serialize(u->job, f); |
613b411c LP |
3371 | } |
3372 | ||
3373 | if (u->nop_job) { | |
d68c645b | 3374 | fputs("job\n", f); |
05a98afd | 3375 | job_serialize(u->nop_job, f); |
613b411c LP |
3376 | } |
3377 | } | |
3378 | ||
a16e1123 LP |
3379 | /* End marker */ |
3380 | fputc('\n', f); | |
3381 | return 0; | |
3382 | } | |
3383 | ||
b17c9620 LP |
3384 | static int unit_deserialize_job(Unit *u, FILE *f) { |
3385 | _cleanup_(job_freep) Job *j = NULL; | |
3386 | int r; | |
3387 | ||
3388 | assert(u); | |
3389 | assert(f); | |
3390 | ||
3391 | j = job_new_raw(u); | |
3392 | if (!j) | |
3393 | return log_oom(); | |
3394 | ||
3395 | r = job_deserialize(j, f); | |
3396 | if (r < 0) | |
3397 | return r; | |
3398 | ||
3399 | r = job_install_deserialized(j); | |
3400 | if (r < 0) | |
3401 | return r; | |
3402 | ||
3403 | TAKE_PTR(j); | |
3404 | return 0; | |
3405 | } | |
3406 | ||
a16e1123 LP |
3407 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
3408 | int r; | |
3409 | ||
3410 | assert(u); | |
3411 | assert(f); | |
3412 | assert(fds); | |
3413 | ||
a16e1123 | 3414 | for (;;) { |
8948b341 | 3415 | _cleanup_free_ char *line = NULL; |
8948b341 | 3416 | char *l, *v; |
83f18c91 | 3417 | ssize_t m; |
a16e1123 LP |
3418 | size_t k; |
3419 | ||
8948b341 LP |
3420 | r = read_line(f, LONG_LINE_MAX, &line); |
3421 | if (r < 0) | |
3422 | return log_error_errno(r, "Failed to read serialization line: %m"); | |
3423 | if (r == 0) /* eof */ | |
3424 | break; | |
a16e1123 LP |
3425 | |
3426 | l = strstrip(line); | |
8948b341 | 3427 | if (isempty(l)) /* End marker */ |
a483fb59 | 3428 | break; |
a16e1123 LP |
3429 | |
3430 | k = strcspn(l, "="); | |
3431 | ||
3432 | if (l[k] == '=') { | |
3433 | l[k] = 0; | |
3434 | v = l+k+1; | |
3435 | } else | |
3436 | v = l+k; | |
3437 | ||
cca098b0 | 3438 | if (streq(l, "job")) { |
39a18c60 | 3439 | if (v[0] == '\0') { |
b17c9620 LP |
3440 | /* New-style serialized job */ |
3441 | r = unit_deserialize_job(u, f); | |
3442 | if (r < 0) | |
e0209d83 | 3443 | return r; |
b17c9620 | 3444 | } else /* Legacy for pre-44 */ |
ed10fa8c | 3445 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); |
cca098b0 | 3446 | continue; |
a483fb59 | 3447 | } else if (streq(l, "state-change-timestamp")) { |
d68c645b | 3448 | (void) deserialize_dual_timestamp(v, &u->state_change_timestamp); |
a483fb59 | 3449 | continue; |
8aaf019b | 3450 | } else if (streq(l, "inactive-exit-timestamp")) { |
d68c645b | 3451 | (void) deserialize_dual_timestamp(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
3452 | continue; |
3453 | } else if (streq(l, "active-enter-timestamp")) { | |
d68c645b | 3454 | (void) deserialize_dual_timestamp(v, &u->active_enter_timestamp); |
8aaf019b LP |
3455 | continue; |
3456 | } else if (streq(l, "active-exit-timestamp")) { | |
d68c645b | 3457 | (void) deserialize_dual_timestamp(v, &u->active_exit_timestamp); |
8aaf019b LP |
3458 | continue; |
3459 | } else if (streq(l, "inactive-enter-timestamp")) { | |
d68c645b | 3460 | (void) deserialize_dual_timestamp(v, &u->inactive_enter_timestamp); |
8aaf019b | 3461 | continue; |
2791a8f8 | 3462 | } else if (streq(l, "condition-timestamp")) { |
d68c645b | 3463 | (void) deserialize_dual_timestamp(v, &u->condition_timestamp); |
2791a8f8 | 3464 | continue; |
59fccdc5 | 3465 | } else if (streq(l, "assert-timestamp")) { |
d68c645b | 3466 | (void) deserialize_dual_timestamp(v, &u->assert_timestamp); |
59fccdc5 | 3467 | continue; |
2791a8f8 | 3468 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 3469 | |
e911de99 LP |
3470 | r = parse_boolean(v); |
3471 | if (r < 0) | |
f2341e0a | 3472 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 3473 | else |
e911de99 | 3474 | u->condition_result = r; |
efbac6d2 LP |
3475 | |
3476 | continue; | |
c2756a68 | 3477 | |
59fccdc5 | 3478 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 3479 | |
e911de99 LP |
3480 | r = parse_boolean(v); |
3481 | if (r < 0) | |
f2341e0a | 3482 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 3483 | else |
e911de99 | 3484 | u->assert_result = r; |
59fccdc5 LP |
3485 | |
3486 | continue; | |
3487 | ||
c2756a68 | 3488 | } else if (streq(l, "transient")) { |
c2756a68 | 3489 | |
e911de99 LP |
3490 | r = parse_boolean(v); |
3491 | if (r < 0) | |
f2341e0a | 3492 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 3493 | else |
e911de99 | 3494 | u->transient = r; |
c2756a68 LP |
3495 | |
3496 | continue; | |
e911de99 | 3497 | |
0e699122 LP |
3498 | } else if (streq(l, "in-audit")) { |
3499 | ||
3500 | r = parse_boolean(v); | |
3501 | if (r < 0) | |
3502 | log_unit_debug(u, "Failed to parse in-audit bool %s, ignoring.", v); | |
3503 | else | |
3504 | u->in_audit = r; | |
3505 | ||
3506 | continue; | |
3507 | ||
d3070fbd LP |
3508 | } else if (streq(l, "exported-invocation-id")) { |
3509 | ||
3510 | r = parse_boolean(v); | |
3511 | if (r < 0) | |
3512 | log_unit_debug(u, "Failed to parse exported invocation ID bool %s, ignoring.", v); | |
3513 | else | |
3514 | u->exported_invocation_id = r; | |
3515 | ||
3516 | continue; | |
3517 | ||
3518 | } else if (streq(l, "exported-log-level-max")) { | |
3519 | ||
3520 | r = parse_boolean(v); | |
3521 | if (r < 0) | |
3522 | log_unit_debug(u, "Failed to parse exported log level max bool %s, ignoring.", v); | |
3523 | else | |
3524 | u->exported_log_level_max = r; | |
3525 | ||
3526 | continue; | |
3527 | ||
3528 | } else if (streq(l, "exported-log-extra-fields")) { | |
3529 | ||
3530 | r = parse_boolean(v); | |
3531 | if (r < 0) | |
3532 | log_unit_debug(u, "Failed to parse exported log extra fields bool %s, ignoring.", v); | |
3533 | else | |
3534 | u->exported_log_extra_fields = r; | |
3535 | ||
3536 | continue; | |
3537 | ||
90fc172e AZ |
3538 | } else if (streq(l, "exported-log-rate-limit-interval")) { |
3539 | ||
3540 | r = parse_boolean(v); | |
3541 | if (r < 0) | |
3542 | log_unit_debug(u, "Failed to parse exported log rate limit interval %s, ignoring.", v); | |
3543 | else | |
3544 | u->exported_log_rate_limit_interval = r; | |
3545 | ||
3546 | continue; | |
3547 | ||
3548 | } else if (streq(l, "exported-log-rate-limit-burst")) { | |
3549 | ||
3550 | r = parse_boolean(v); | |
3551 | if (r < 0) | |
3552 | log_unit_debug(u, "Failed to parse exported log rate limit burst %s, ignoring.", v); | |
3553 | else | |
3554 | u->exported_log_rate_limit_burst = r; | |
3555 | ||
3556 | continue; | |
3557 | ||
fe700f46 | 3558 | } else if (STR_IN_SET(l, "cpu-usage-base", "cpuacct-usage-base")) { |
5ad096b3 | 3559 | |
66ebf6c0 | 3560 | r = safe_atou64(v, &u->cpu_usage_base); |
5ad096b3 | 3561 | if (r < 0) |
fe700f46 LP |
3562 | log_unit_debug(u, "Failed to parse CPU usage base %s, ignoring.", v); |
3563 | ||
3564 | continue; | |
3565 | ||
3566 | } else if (streq(l, "cpu-usage-last")) { | |
3567 | ||
3568 | r = safe_atou64(v, &u->cpu_usage_last); | |
3569 | if (r < 0) | |
3570 | log_unit_debug(u, "Failed to read CPU usage last %s, ignoring.", v); | |
5ad096b3 | 3571 | |
0f908397 | 3572 | continue; |
4e595329 | 3573 | |
afcfaa69 LP |
3574 | } else if (streq(l, "oom-kill-last")) { |
3575 | ||
3576 | r = safe_atou64(v, &u->oom_kill_last); | |
3577 | if (r < 0) | |
3578 | log_unit_debug(u, "Failed to read OOM kill last %s, ignoring.", v); | |
3579 | ||
3580 | continue; | |
3581 | ||
e911de99 | 3582 | } else if (streq(l, "cgroup")) { |
72673e86 | 3583 | |
e911de99 LP |
3584 | r = unit_set_cgroup_path(u, v); |
3585 | if (r < 0) | |
f2341e0a | 3586 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 3587 | |
efdb0237 | 3588 | (void) unit_watch_cgroup(u); |
afcfaa69 | 3589 | (void) unit_watch_cgroup_memory(u); |
efdb0237 | 3590 | |
de1d4f9b WF |
3591 | continue; |
3592 | } else if (streq(l, "cgroup-realized")) { | |
3593 | int b; | |
3594 | ||
3595 | b = parse_boolean(v); | |
3596 | if (b < 0) | |
3597 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
3598 | else | |
3599 | u->cgroup_realized = b; | |
3600 | ||
c2756a68 | 3601 | continue; |
00d9ef85 | 3602 | |
8b108bd0 FB |
3603 | } else if (streq(l, "cgroup-realized-mask")) { |
3604 | ||
3605 | r = cg_mask_from_string(v, &u->cgroup_realized_mask); | |
3606 | if (r < 0) | |
3607 | log_unit_debug(u, "Failed to parse cgroup-realized-mask %s, ignoring.", v); | |
3608 | continue; | |
3609 | ||
3610 | } else if (streq(l, "cgroup-enabled-mask")) { | |
3611 | ||
3612 | r = cg_mask_from_string(v, &u->cgroup_enabled_mask); | |
3613 | if (r < 0) | |
3614 | log_unit_debug(u, "Failed to parse cgroup-enabled-mask %s, ignoring.", v); | |
3615 | continue; | |
3616 | ||
17f14955 | 3617 | } else if (streq(l, "cgroup-invalidated-mask")) { |
906c06f6 | 3618 | |
17f14955 | 3619 | r = cg_mask_from_string(v, &u->cgroup_invalidated_mask); |
906c06f6 | 3620 | if (r < 0) |
17f14955 | 3621 | log_unit_debug(u, "Failed to parse cgroup-invalidated-mask %s, ignoring.", v); |
906c06f6 DM |
3622 | continue; |
3623 | ||
00d9ef85 LP |
3624 | } else if (streq(l, "ref-uid")) { |
3625 | uid_t uid; | |
3626 | ||
3627 | r = parse_uid(v, &uid); | |
3628 | if (r < 0) | |
3629 | log_unit_debug(u, "Failed to parse referenced UID %s, ignoring.", v); | |
3630 | else | |
3631 | unit_ref_uid_gid(u, uid, GID_INVALID); | |
3632 | ||
3633 | continue; | |
3634 | ||
3635 | } else if (streq(l, "ref-gid")) { | |
3636 | gid_t gid; | |
3637 | ||
3638 | r = parse_gid(v, &gid); | |
3639 | if (r < 0) | |
3640 | log_unit_debug(u, "Failed to parse referenced GID %s, ignoring.", v); | |
3641 | else | |
3642 | unit_ref_uid_gid(u, UID_INVALID, gid); | |
3643 | ||
5f616d5f LP |
3644 | continue; |
3645 | ||
05a98afd LP |
3646 | } else if (streq(l, "ref")) { |
3647 | ||
3648 | r = strv_extend(&u->deserialized_refs, v); | |
3649 | if (r < 0) | |
d68c645b | 3650 | return log_oom(); |
05a98afd | 3651 | |
4b58153d LP |
3652 | continue; |
3653 | } else if (streq(l, "invocation-id")) { | |
3654 | sd_id128_t id; | |
3655 | ||
3656 | r = sd_id128_from_string(v, &id); | |
3657 | if (r < 0) | |
3658 | log_unit_debug(u, "Failed to parse invocation id %s, ignoring.", v); | |
3659 | else { | |
3660 | r = unit_set_invocation_id(u, id); | |
3661 | if (r < 0) | |
3662 | log_unit_warning_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
3663 | } | |
3664 | ||
00d9ef85 | 3665 | continue; |
8aaf019b | 3666 | } |
cca098b0 | 3667 | |
6b659ed8 | 3668 | /* Check if this is an IP accounting metric serialization field */ |
83f18c91 LP |
3669 | m = string_table_lookup(ip_accounting_metric_field, ELEMENTSOF(ip_accounting_metric_field), l); |
3670 | if (m >= 0) { | |
6b659ed8 LP |
3671 | uint64_t c; |
3672 | ||
3673 | r = safe_atou64(v, &c); | |
3674 | if (r < 0) | |
3675 | log_unit_debug(u, "Failed to parse IP accounting value %s, ignoring.", v); | |
3676 | else | |
3677 | u->ip_accounting_extra[m] = c; | |
3678 | continue; | |
3679 | } | |
3680 | ||
fbe14fc9 LP |
3681 | m = string_table_lookup(io_accounting_metric_field_base, ELEMENTSOF(io_accounting_metric_field_base), l); |
3682 | if (m >= 0) { | |
3683 | uint64_t c; | |
3684 | ||
3685 | r = safe_atou64(v, &c); | |
3686 | if (r < 0) | |
3687 | log_unit_debug(u, "Failed to parse IO accounting base value %s, ignoring.", v); | |
3688 | else | |
3689 | u->io_accounting_base[m] = c; | |
3690 | continue; | |
3691 | } | |
3692 | ||
3693 | m = string_table_lookup(io_accounting_metric_field_last, ELEMENTSOF(io_accounting_metric_field_last), l); | |
3694 | if (m >= 0) { | |
3695 | uint64_t c; | |
3696 | ||
3697 | r = safe_atou64(v, &c); | |
3698 | if (r < 0) | |
3699 | log_unit_debug(u, "Failed to parse IO accounting last value %s, ignoring.", v); | |
3700 | else | |
3701 | u->io_accounting_last[m] = c; | |
3702 | continue; | |
3703 | } | |
3704 | ||
9bdb98c5 | 3705 | if (unit_can_serialize(u)) { |
e8a565cb YW |
3706 | r = exec_runtime_deserialize_compat(u, l, v, fds); |
3707 | if (r < 0) { | |
3708 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); | |
3709 | continue; | |
9bdb98c5 LP |
3710 | } |
3711 | ||
e8a565cb YW |
3712 | /* Returns positive if key was handled by the call */ |
3713 | if (r > 0) | |
3714 | continue; | |
3715 | ||
9bdb98c5 | 3716 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); |
613b411c | 3717 | if (r < 0) |
f2341e0a | 3718 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 3719 | } |
a16e1123 | 3720 | } |
a483fb59 LP |
3721 | |
3722 | /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is | |
3723 | * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from | |
1f133e0d | 3724 | * before 228 where the base for timeouts was not persistent across reboots. */ |
a483fb59 LP |
3725 | |
3726 | if (!dual_timestamp_is_set(&u->state_change_timestamp)) | |
3727 | dual_timestamp_get(&u->state_change_timestamp); | |
3728 | ||
58d83430 LP |
3729 | /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied |
3730 | * after we are done. For that we invalidate anything already realized, so that we can realize it again. */ | |
3731 | unit_invalidate_cgroup(u, _CGROUP_MASK_ALL); | |
3732 | unit_invalidate_cgroup_bpf(u); | |
3733 | ||
a483fb59 | 3734 | return 0; |
a16e1123 LP |
3735 | } |
3736 | ||
8948b341 LP |
3737 | int unit_deserialize_skip(FILE *f) { |
3738 | int r; | |
07429866 ZJS |
3739 | assert(f); |
3740 | ||
3741 | /* Skip serialized data for this unit. We don't know what it is. */ | |
3742 | ||
3743 | for (;;) { | |
8948b341 LP |
3744 | _cleanup_free_ char *line = NULL; |
3745 | char *l; | |
07429866 | 3746 | |
8948b341 LP |
3747 | r = read_line(f, LONG_LINE_MAX, &line); |
3748 | if (r < 0) | |
3749 | return log_error_errno(r, "Failed to read serialization line: %m"); | |
3750 | if (r == 0) | |
3751 | return 0; | |
07429866 | 3752 | |
07429866 ZJS |
3753 | l = strstrip(line); |
3754 | ||
3755 | /* End marker */ | |
3756 | if (isempty(l)) | |
8948b341 | 3757 | return 1; |
07429866 ZJS |
3758 | } |
3759 | } | |
3760 | ||
eef85c4a | 3761 | int unit_add_node_dependency(Unit *u, const char *what, bool wants, UnitDependency dep, UnitDependencyMask mask) { |
6e2ef85b | 3762 | Unit *device; |
68eda4bd | 3763 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
3764 | int r; |
3765 | ||
3766 | assert(u); | |
3767 | ||
6e2ef85b | 3768 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3769 | if (isempty(what)) |
3770 | return 0; | |
6e2ef85b | 3771 | |
8407a5d0 | 3772 | if (!is_device_path(what)) |
6e2ef85b LP |
3773 | return 0; |
3774 | ||
47bc12e1 LP |
3775 | /* When device units aren't supported (such as in a |
3776 | * container), don't create dependencies on them. */ | |
1c2e9646 | 3777 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3778 | return 0; |
3779 | ||
7410616c LP |
3780 | r = unit_name_from_path(what, ".device", &e); |
3781 | if (r < 0) | |
3782 | return r; | |
6e2ef85b | 3783 | |
ac155bb8 | 3784 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3785 | if (r < 0) |
3786 | return r; | |
3787 | ||
ebc8968b FB |
3788 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3789 | dep = UNIT_BINDS_TO; | |
3790 | ||
9d06297e | 3791 | r = unit_add_two_dependencies(u, UNIT_AFTER, |
463d0d15 | 3792 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, |
eef85c4a | 3793 | device, true, mask); |
faa368e3 | 3794 | if (r < 0) |
6e2ef85b LP |
3795 | return r; |
3796 | ||
faa368e3 | 3797 | if (wants) { |
eef85c4a | 3798 | r = unit_add_dependency(device, UNIT_WANTS, u, false, mask); |
faa368e3 | 3799 | if (r < 0) |
6e2ef85b | 3800 | return r; |
faa368e3 | 3801 | } |
6e2ef85b LP |
3802 | |
3803 | return 0; | |
3804 | } | |
a16e1123 | 3805 | |
be847e82 | 3806 | int unit_coldplug(Unit *u) { |
05a98afd LP |
3807 | int r = 0, q; |
3808 | char **i; | |
cca098b0 LP |
3809 | |
3810 | assert(u); | |
3811 | ||
f0831ed2 | 3812 | /* Make sure we don't enter a loop, when coldplugging recursively. */ |
f78f265f LP |
3813 | if (u->coldplugged) |
3814 | return 0; | |
3815 | ||
3816 | u->coldplugged = true; | |
3817 | ||
05a98afd LP |
3818 | STRV_FOREACH(i, u->deserialized_refs) { |
3819 | q = bus_unit_track_add_name(u, *i); | |
3820 | if (q < 0 && r >= 0) | |
3821 | r = q; | |
3822 | } | |
3823 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 3824 | |
05a98afd LP |
3825 | if (UNIT_VTABLE(u)->coldplug) { |
3826 | q = UNIT_VTABLE(u)->coldplug(u); | |
3827 | if (q < 0 && r >= 0) | |
3828 | r = q; | |
3829 | } | |
5a6158b6 | 3830 | |
05a98afd LP |
3831 | if (u->job) { |
3832 | q = job_coldplug(u->job); | |
3833 | if (q < 0 && r >= 0) | |
3834 | r = q; | |
3835 | } | |
cca098b0 | 3836 | |
05a98afd | 3837 | return r; |
cca098b0 LP |
3838 | } |
3839 | ||
f0831ed2 LP |
3840 | void unit_catchup(Unit *u) { |
3841 | assert(u); | |
3842 | ||
3843 | if (UNIT_VTABLE(u)->catchup) | |
3844 | UNIT_VTABLE(u)->catchup(u); | |
3845 | } | |
3846 | ||
ba25d39e | 3847 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3848 | struct stat st; |
3849 | ||
3850 | if (!path) | |
3851 | return false; | |
3852 | ||
77969722 LP |
3853 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3854 | * are never out-of-date. */ | |
3855 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3856 | return false; | |
3857 | ||
21b95806 ZJS |
3858 | if (stat(path, &st) < 0) |
3859 | /* What, cannot access this anymore? */ | |
3860 | return true; | |
3861 | ||
ba25d39e ZJS |
3862 | if (path_masked) |
3863 | /* For masked files check if they are still so */ | |
3864 | return !null_or_empty(&st); | |
3865 | else | |
3a8db9fe | 3866 | /* For non-empty files check the mtime */ |
87ec20ef | 3867 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3868 | |
3869 | return false; | |
3870 | } | |
3871 | ||
45fb0699 | 3872 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
3873 | _cleanup_strv_free_ char **t = NULL; |
3874 | char **path; | |
1b64d026 | 3875 | |
45fb0699 LP |
3876 | assert(u); |
3877 | ||
ba25d39e ZJS |
3878 | /* For unit files, we allow masking… */ |
3879 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3880 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3881 | return true; |
5f4b19f4 | 3882 | |
ba25d39e ZJS |
3883 | /* Source paths should not be masked… */ |
3884 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3885 | return true; |
ae7a7182 | 3886 | |
19a44dfe LR |
3887 | if (u->load_state == UNIT_LOADED) |
3888 | (void) unit_find_dropin_paths(u, &t); | |
ab932a62 LP |
3889 | if (!strv_equal(u->dropin_paths, t)) |
3890 | return true; | |
6d10d308 | 3891 | |
ba25d39e | 3892 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3893 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3894 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3895 | return true; |
21b95806 | 3896 | |
ab932a62 | 3897 | return false; |
45fb0699 LP |
3898 | } |
3899 | ||
fdf20a31 | 3900 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3901 | assert(u); |
3902 | ||
fdf20a31 MM |
3903 | if (UNIT_VTABLE(u)->reset_failed) |
3904 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 LP |
3905 | |
3906 | RATELIMIT_RESET(u->start_limit); | |
3907 | u->start_limit_hit = false; | |
5632e374 LP |
3908 | } |
3909 | ||
a7f241db LP |
3910 | Unit *unit_following(Unit *u) { |
3911 | assert(u); | |
3912 | ||
3913 | if (UNIT_VTABLE(u)->following) | |
3914 | return UNIT_VTABLE(u)->following(u); | |
3915 | ||
3916 | return NULL; | |
3917 | } | |
3918 | ||
31afa0a4 | 3919 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3920 | assert(u); |
3921 | ||
31afa0a4 LP |
3922 | /* This call does check the current state of the unit. It's |
3923 | * hence useful to be called from state change calls of the | |
3924 | * unit itself, where the state isn't updated yet. This is | |
3925 | * different from unit_inactive_or_pending() which checks both | |
3926 | * the current state and for a queued job. */ | |
18ffdfda | 3927 | |
31afa0a4 LP |
3928 | return u->job && u->job->type == JOB_STOP; |
3929 | } | |
3930 | ||
3931 | bool unit_inactive_or_pending(Unit *u) { | |
3932 | assert(u); | |
3933 | ||
3934 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3935 | |
d956ac29 LP |
3936 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3937 | return true; | |
3938 | ||
31afa0a4 | 3939 | if (unit_stop_pending(u)) |
18ffdfda LP |
3940 | return true; |
3941 | ||
3942 | return false; | |
3943 | } | |
3944 | ||
31afa0a4 | 3945 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3946 | assert(u); |
3947 | ||
f60c2665 | 3948 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3949 | |
3950 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3951 | return true; | |
3952 | ||
ac155bb8 | 3953 | if (u->job && |
3742095b | 3954 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
3955 | return true; |
3956 | ||
3957 | return false; | |
3958 | } | |
3959 | ||
deb4e708 MK |
3960 | bool unit_will_restart(Unit *u) { |
3961 | assert(u); | |
3962 | ||
3963 | if (!UNIT_VTABLE(u)->will_restart) | |
3964 | return false; | |
3965 | ||
3966 | return UNIT_VTABLE(u)->will_restart(u); | |
3967 | } | |
3968 | ||
718db961 | 3969 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3970 | assert(u); |
3971 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 3972 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 3973 | |
8a0867d6 | 3974 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3975 | return -EOPNOTSUPP; |
8a0867d6 | 3976 | |
c74f17d9 | 3977 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3978 | } |
3979 | ||
82659fd7 | 3980 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
af4fa99d | 3981 | _cleanup_set_free_ Set *pid_set = NULL; |
82659fd7 LP |
3982 | int r; |
3983 | ||
d5099efc | 3984 | pid_set = set_new(NULL); |
82659fd7 LP |
3985 | if (!pid_set) |
3986 | return NULL; | |
3987 | ||
3988 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3989 | if (main_pid > 0) { | |
fea72cc0 | 3990 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 | 3991 | if (r < 0) |
95f14a3e | 3992 | return NULL; |
82659fd7 LP |
3993 | } |
3994 | ||
3995 | if (control_pid > 0) { | |
fea72cc0 | 3996 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 | 3997 | if (r < 0) |
95f14a3e | 3998 | return NULL; |
82659fd7 LP |
3999 | } |
4000 | ||
95f14a3e | 4001 | return TAKE_PTR(pid_set); |
82659fd7 LP |
4002 | } |
4003 | ||
d91c34f2 LP |
4004 | int unit_kill_common( |
4005 | Unit *u, | |
4006 | KillWho who, | |
4007 | int signo, | |
4008 | pid_t main_pid, | |
4009 | pid_t control_pid, | |
718db961 | 4010 | sd_bus_error *error) { |
d91c34f2 | 4011 | |
814cc562 | 4012 | int r = 0; |
ac5e3a50 | 4013 | bool killed = false; |
814cc562 | 4014 | |
ac5e3a50 | 4015 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 4016 | if (main_pid < 0) |
7358dc02 | 4017 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 4018 | else if (main_pid == 0) |
7358dc02 | 4019 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
4020 | } |
4021 | ||
ac5e3a50 | 4022 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 4023 | if (control_pid < 0) |
7358dc02 | 4024 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 4025 | else if (control_pid == 0) |
7358dc02 | 4026 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
4027 | } |
4028 | ||
ac5e3a50 JS |
4029 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
4030 | if (control_pid > 0) { | |
814cc562 MS |
4031 | if (kill(control_pid, signo) < 0) |
4032 | r = -errno; | |
ac5e3a50 JS |
4033 | else |
4034 | killed = true; | |
4035 | } | |
814cc562 | 4036 | |
ac5e3a50 JS |
4037 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
4038 | if (main_pid > 0) { | |
814cc562 MS |
4039 | if (kill(main_pid, signo) < 0) |
4040 | r = -errno; | |
ac5e3a50 JS |
4041 | else |
4042 | killed = true; | |
4043 | } | |
814cc562 | 4044 | |
ac5e3a50 | 4045 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
4046 | _cleanup_set_free_ Set *pid_set = NULL; |
4047 | int q; | |
4048 | ||
82659fd7 LP |
4049 | /* Exclude the main/control pids from being killed via the cgroup */ |
4050 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
4051 | if (!pid_set) |
4052 | return -ENOMEM; | |
4053 | ||
1d98fef1 | 4054 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, NULL, NULL); |
4c701096 | 4055 | if (q < 0 && !IN_SET(q, -EAGAIN, -ESRCH, -ENOENT)) |
814cc562 | 4056 | r = q; |
ac5e3a50 JS |
4057 | else |
4058 | killed = true; | |
814cc562 MS |
4059 | } |
4060 | ||
201f0c91 | 4061 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL)) |
ac5e3a50 JS |
4062 | return -ESRCH; |
4063 | ||
814cc562 MS |
4064 | return r; |
4065 | } | |
4066 | ||
6210e7fc LP |
4067 | int unit_following_set(Unit *u, Set **s) { |
4068 | assert(u); | |
4069 | assert(s); | |
4070 | ||
4071 | if (UNIT_VTABLE(u)->following_set) | |
4072 | return UNIT_VTABLE(u)->following_set(u, s); | |
4073 | ||
4074 | *s = NULL; | |
4075 | return 0; | |
4076 | } | |
4077 | ||
a4375746 | 4078 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
4079 | int r; |
4080 | ||
a4375746 LP |
4081 | assert(u); |
4082 | ||
0ec0deaa LP |
4083 | if (u->unit_file_state < 0 && u->fragment_path) { |
4084 | r = unit_file_get_state( | |
463d0d15 | 4085 | u->manager->unit_file_scope, |
0ec0deaa | 4086 | NULL, |
9ea3a0e7 | 4087 | u->id, |
0ec0deaa LP |
4088 | &u->unit_file_state); |
4089 | if (r < 0) | |
4090 | u->unit_file_state = UNIT_FILE_BAD; | |
4091 | } | |
a4375746 | 4092 | |
ac155bb8 | 4093 | return u->unit_file_state; |
a4375746 LP |
4094 | } |
4095 | ||
d2dc52db LP |
4096 | int unit_get_unit_file_preset(Unit *u) { |
4097 | assert(u); | |
4098 | ||
4099 | if (u->unit_file_preset < 0 && u->fragment_path) | |
4100 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 4101 | u->manager->unit_file_scope, |
0ec0deaa LP |
4102 | NULL, |
4103 | basename(u->fragment_path)); | |
d2dc52db LP |
4104 | |
4105 | return u->unit_file_preset; | |
4106 | } | |
4107 | ||
7f7d01ed | 4108 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 4109 | assert(ref); |
7f7d01ed ZJS |
4110 | assert(source); |
4111 | assert(target); | |
57020a3a | 4112 | |
7f7d01ed | 4113 | if (ref->target) |
57020a3a LP |
4114 | unit_ref_unset(ref); |
4115 | ||
7f7d01ed ZJS |
4116 | ref->source = source; |
4117 | ref->target = target; | |
4118 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
4119 | return target; | |
57020a3a LP |
4120 | } |
4121 | ||
4122 | void unit_ref_unset(UnitRef *ref) { | |
4123 | assert(ref); | |
4124 | ||
7f7d01ed | 4125 | if (!ref->target) |
57020a3a LP |
4126 | return; |
4127 | ||
b75102e5 LP |
4128 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
4129 | * be unreferenced now. */ | |
7f7d01ed | 4130 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 4131 | |
7f7d01ed ZJS |
4132 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
4133 | ref->source = ref->target = NULL; | |
57020a3a LP |
4134 | } |
4135 | ||
29206d46 LP |
4136 | static int user_from_unit_name(Unit *u, char **ret) { |
4137 | ||
4138 | static const uint8_t hash_key[] = { | |
4139 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
4140 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
4141 | }; | |
4142 | ||
4143 | _cleanup_free_ char *n = NULL; | |
4144 | int r; | |
4145 | ||
4146 | r = unit_name_to_prefix(u->id, &n); | |
4147 | if (r < 0) | |
4148 | return r; | |
4149 | ||
4150 | if (valid_user_group_name(n)) { | |
ae2a15bc | 4151 | *ret = TAKE_PTR(n); |
29206d46 LP |
4152 | return 0; |
4153 | } | |
4154 | ||
4155 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
4156 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
4157 | return -ENOMEM; | |
4158 | ||
4159 | return 0; | |
4160 | } | |
4161 | ||
598459ce LP |
4162 | int unit_patch_contexts(Unit *u) { |
4163 | CGroupContext *cc; | |
4164 | ExecContext *ec; | |
cba6e062 LP |
4165 | unsigned i; |
4166 | int r; | |
4167 | ||
e06c73cc | 4168 | assert(u); |
e06c73cc | 4169 | |
598459ce LP |
4170 | /* Patch in the manager defaults into the exec and cgroup |
4171 | * contexts, _after_ the rest of the settings have been | |
4172 | * initialized */ | |
085afe36 | 4173 | |
598459ce LP |
4174 | ec = unit_get_exec_context(u); |
4175 | if (ec) { | |
4176 | /* This only copies in the ones that need memory */ | |
4177 | for (i = 0; i < _RLIMIT_MAX; i++) | |
4178 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
4179 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
4180 | if (!ec->rlimit[i]) | |
4181 | return -ENOMEM; | |
4182 | } | |
4183 | ||
463d0d15 | 4184 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4185 | !ec->working_directory) { |
4186 | ||
4187 | r = get_home_dir(&ec->working_directory); | |
4188 | if (r < 0) | |
4189 | return r; | |
4c08c824 LP |
4190 | |
4191 | /* Allow user services to run, even if the | |
4192 | * home directory is missing */ | |
4193 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4194 | } |
4195 | ||
598459ce | 4196 | if (ec->private_devices) |
2cd0a735 | 4197 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4198 | |
4199 | if (ec->protect_kernel_modules) | |
4200 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 LP |
4201 | |
4202 | if (ec->dynamic_user) { | |
4203 | if (!ec->user) { | |
4204 | r = user_from_unit_name(u, &ec->user); | |
4205 | if (r < 0) | |
4206 | return r; | |
4207 | } | |
4208 | ||
4209 | if (!ec->group) { | |
4210 | ec->group = strdup(ec->user); | |
4211 | if (!ec->group) | |
4212 | return -ENOMEM; | |
4213 | } | |
4214 | ||
bf65b7e0 LP |
4215 | /* If the dynamic user option is on, let's make sure that the unit can't leave its |
4216 | * UID/GID around in the file system or on IPC objects. Hence enforce a strict | |
4217 | * sandbox. */ | |
63bb64a0 | 4218 | |
29206d46 | 4219 | ec->private_tmp = true; |
00d9ef85 | 4220 | ec->remove_ipc = true; |
63bb64a0 LP |
4221 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4222 | if (ec->protect_home == PROTECT_HOME_NO) | |
4223 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
bf65b7e0 LP |
4224 | |
4225 | /* Make sure this service can neither benefit from SUID/SGID binaries nor create | |
4226 | * them. */ | |
4227 | ec->no_new_privileges = true; | |
4228 | ec->restrict_suid_sgid = true; | |
29206d46 | 4229 | } |
cba6e062 LP |
4230 | } |
4231 | ||
598459ce | 4232 | cc = unit_get_cgroup_context(u); |
fe65e88b | 4233 | if (cc && ec) { |
f513e420 | 4234 | |
fe65e88b | 4235 | if (ec->private_devices && |
598459ce LP |
4236 | cc->device_policy == CGROUP_AUTO) |
4237 | cc->device_policy = CGROUP_CLOSED; | |
fe65e88b YW |
4238 | |
4239 | if (ec->root_image && | |
4240 | (cc->device_policy != CGROUP_AUTO || cc->device_allow)) { | |
4241 | ||
4242 | /* When RootImage= is specified, the following devices are touched. */ | |
4243 | r = cgroup_add_device_allow(cc, "/dev/loop-control", "rw"); | |
4244 | if (r < 0) | |
4245 | return r; | |
4246 | ||
4247 | r = cgroup_add_device_allow(cc, "block-loop", "rwm"); | |
4248 | if (r < 0) | |
4249 | return r; | |
4250 | ||
4251 | r = cgroup_add_device_allow(cc, "block-blkext", "rwm"); | |
4252 | if (r < 0) | |
4253 | return r; | |
4254 | } | |
598459ce | 4255 | } |
f1660f96 | 4256 | |
cba6e062 | 4257 | return 0; |
e06c73cc LP |
4258 | } |
4259 | ||
3ef63c31 LP |
4260 | ExecContext *unit_get_exec_context(Unit *u) { |
4261 | size_t offset; | |
4262 | assert(u); | |
4263 | ||
598459ce LP |
4264 | if (u->type < 0) |
4265 | return NULL; | |
4266 | ||
3ef63c31 LP |
4267 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4268 | if (offset <= 0) | |
4269 | return NULL; | |
4270 | ||
4271 | return (ExecContext*) ((uint8_t*) u + offset); | |
4272 | } | |
4273 | ||
718db961 LP |
4274 | KillContext *unit_get_kill_context(Unit *u) { |
4275 | size_t offset; | |
4276 | assert(u); | |
4277 | ||
598459ce LP |
4278 | if (u->type < 0) |
4279 | return NULL; | |
4280 | ||
718db961 LP |
4281 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4282 | if (offset <= 0) | |
4283 | return NULL; | |
4284 | ||
4285 | return (KillContext*) ((uint8_t*) u + offset); | |
4286 | } | |
4287 | ||
4ad49000 LP |
4288 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4289 | size_t offset; | |
4290 | ||
598459ce LP |
4291 | if (u->type < 0) |
4292 | return NULL; | |
4293 | ||
4ad49000 LP |
4294 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4295 | if (offset <= 0) | |
4296 | return NULL; | |
4297 | ||
4298 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4299 | } | |
4300 | ||
613b411c LP |
4301 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4302 | size_t offset; | |
4303 | ||
598459ce LP |
4304 | if (u->type < 0) |
4305 | return NULL; | |
4306 | ||
613b411c LP |
4307 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4308 | if (offset <= 0) | |
4309 | return NULL; | |
4310 | ||
4311 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4312 | } | |
4313 | ||
2e59b241 | 4314 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4315 | assert(u); |
4316 | ||
2e59b241 | 4317 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4318 | return NULL; |
4319 | ||
39591351 LP |
4320 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4321 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4322 | |
2e59b241 | 4323 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4324 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4325 | |
2e59b241 LP |
4326 | if (flags & UNIT_RUNTIME) |
4327 | return u->manager->lookup_paths.runtime_control; | |
4328 | ||
39591351 | 4329 | return NULL; |
71645aca LP |
4330 | } |
4331 | ||
2e59b241 LP |
4332 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4333 | char *ret = NULL; | |
4334 | ||
4335 | if (!s) | |
4336 | return NULL; | |
4337 | ||
4338 | /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated | |
4339 | * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is | |
4340 | * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly | |
4341 | * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is | |
4342 | * not specified, then the return value always needs to be freed. Callers can use this to optimize memory | |
4343 | * allocations. */ | |
4344 | ||
4345 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
4346 | ret = specifier_escape(s); | |
4347 | if (!ret) | |
4348 | return NULL; | |
4349 | ||
4350 | s = ret; | |
4351 | } | |
4352 | ||
4353 | if (flags & UNIT_ESCAPE_C) { | |
4354 | char *a; | |
4355 | ||
4356 | a = cescape(s); | |
4357 | free(ret); | |
4358 | if (!a) | |
4359 | return NULL; | |
4360 | ||
4361 | ret = a; | |
4362 | } | |
4363 | ||
4364 | if (buf) { | |
4365 | *buf = ret; | |
4366 | return ret ?: (char*) s; | |
4367 | } | |
4368 | ||
4369 | return ret ?: strdup(s); | |
4370 | } | |
4371 | ||
4372 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4373 | _cleanup_free_ char *result = NULL; | |
4374 | size_t n = 0, allocated = 0; | |
ae2a15bc | 4375 | char **i; |
2e59b241 LP |
4376 | |
4377 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a | |
4378 | * way suitable for ExecStart= stanzas */ | |
4379 | ||
4380 | STRV_FOREACH(i, l) { | |
4381 | _cleanup_free_ char *buf = NULL; | |
4382 | const char *p; | |
4383 | size_t a; | |
4384 | char *q; | |
4385 | ||
4386 | p = unit_escape_setting(*i, flags, &buf); | |
4387 | if (!p) | |
4388 | return NULL; | |
4389 | ||
4390 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
4391 | if (!GREEDY_REALLOC(result, allocated, n + a + 1)) | |
4392 | return NULL; | |
4393 | ||
4394 | q = result + n; | |
4395 | if (n > 0) | |
4396 | *(q++) = ' '; | |
4397 | ||
4398 | *(q++) = '"'; | |
4399 | q = stpcpy(q, p); | |
4400 | *(q++) = '"'; | |
4401 | ||
4402 | n += a; | |
4403 | } | |
4404 | ||
4405 | if (!GREEDY_REALLOC(result, allocated, n + 1)) | |
4406 | return NULL; | |
4407 | ||
4408 | result[n] = 0; | |
4409 | ||
ae2a15bc | 4410 | return TAKE_PTR(result); |
2e59b241 LP |
4411 | } |
4412 | ||
4413 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4414 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4415 | const char *dir, *wrapped; |
26d04f86 | 4416 | int r; |
71645aca LP |
4417 | |
4418 | assert(u); | |
2e59b241 LP |
4419 | assert(name); |
4420 | assert(data); | |
4421 | ||
4422 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4423 | return 0; | |
4424 | ||
4425 | data = unit_escape_setting(data, flags, &escaped); | |
4426 | if (!data) | |
4427 | return -ENOMEM; | |
4428 | ||
4429 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4430 | * previous section header is the same */ | |
4431 | ||
4432 | if (flags & UNIT_PRIVATE) { | |
4433 | if (!UNIT_VTABLE(u)->private_section) | |
4434 | return -EINVAL; | |
4435 | ||
4436 | if (!u->transient_file || u->last_section_private < 0) | |
4437 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4438 | else if (u->last_section_private == 0) | |
4439 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4440 | } else { | |
4441 | if (!u->transient_file || u->last_section_private < 0) | |
4442 | data = strjoina("[Unit]\n", data); | |
4443 | else if (u->last_section_private > 0) | |
4444 | data = strjoina("\n[Unit]\n", data); | |
4445 | } | |
71645aca | 4446 | |
4f4afc88 LP |
4447 | if (u->transient_file) { |
4448 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4449 | * write to the transient unit file. */ | |
4450 | fputs(data, u->transient_file); | |
4f4afc88 | 4451 | |
2e59b241 LP |
4452 | if (!endswith(data, "\n")) |
4453 | fputc('\n', u->transient_file); | |
4454 | ||
4455 | /* Remember which section we wrote this entry to */ | |
4456 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4457 | return 0; |
2e59b241 | 4458 | } |
8e2af478 | 4459 | |
2e59b241 | 4460 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4461 | if (!dir) |
4462 | return -EINVAL; | |
71645aca | 4463 | |
2a9a6f8a | 4464 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4465 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4466 | data, |
4467 | "\n"); | |
e20b2a86 | 4468 | |
815b09d3 | 4469 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4470 | if (r < 0) |
4471 | return r; | |
4472 | ||
45639f1b | 4473 | (void) mkdir_p_label(p, 0755); |
2a9a6f8a | 4474 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4475 | if (r < 0) |
4476 | return r; | |
4477 | ||
815b09d3 | 4478 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4479 | if (r < 0) |
4480 | return r; | |
815b09d3 | 4481 | q = NULL; |
adb76a70 | 4482 | |
adb76a70 WC |
4483 | strv_uniq(u->dropin_paths); |
4484 | ||
4485 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4486 | ||
4487 | return 0; | |
26d04f86 | 4488 | } |
71645aca | 4489 | |
2e59b241 | 4490 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4491 | _cleanup_free_ char *p = NULL; |
4492 | va_list ap; | |
4493 | int r; | |
4494 | ||
4495 | assert(u); | |
4496 | assert(name); | |
4497 | assert(format); | |
4498 | ||
2e59b241 | 4499 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4500 | return 0; |
4501 | ||
4502 | va_start(ap, format); | |
4503 | r = vasprintf(&p, format, ap); | |
4504 | va_end(ap); | |
4505 | ||
4506 | if (r < 0) | |
4507 | return -ENOMEM; | |
4508 | ||
2e59b241 | 4509 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4510 | } |
71645aca | 4511 | |
c2756a68 | 4512 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4513 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4514 | FILE *f; |
4f4afc88 | 4515 | |
c2756a68 LP |
4516 | assert(u); |
4517 | ||
3f5e8115 LP |
4518 | if (!UNIT_VTABLE(u)->can_transient) |
4519 | return -EOPNOTSUPP; | |
4520 | ||
45639f1b LP |
4521 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4522 | ||
605405c6 | 4523 | path = strjoin(u->manager->lookup_paths.transient, "/", u->id); |
4f4afc88 LP |
4524 | if (!path) |
4525 | return -ENOMEM; | |
4526 | ||
4527 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4528 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4529 | ||
78e334b5 | 4530 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 4531 | f = fopen(path, "we"); |
0126c8f3 | 4532 | if (!f) |
78e334b5 | 4533 | return -errno; |
4f4afc88 LP |
4534 | } |
4535 | ||
0126c8f3 | 4536 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4537 | u->transient_file = f; |
4538 | ||
0126c8f3 | 4539 | free_and_replace(u->fragment_path, path); |
7c65093a | 4540 | |
7c65093a LP |
4541 | u->source_path = mfree(u->source_path); |
4542 | u->dropin_paths = strv_free(u->dropin_paths); | |
4543 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4544 | ||
4f4afc88 LP |
4545 | u->load_state = UNIT_STUB; |
4546 | u->load_error = 0; | |
4547 | u->transient = true; | |
4548 | ||
7c65093a LP |
4549 | unit_add_to_dbus_queue(u); |
4550 | unit_add_to_gc_queue(u); | |
c2756a68 | 4551 | |
4f4afc88 LP |
4552 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4553 | u->transient_file); | |
4554 | ||
3f5e8115 | 4555 | return 0; |
c2756a68 LP |
4556 | } |
4557 | ||
c53d2d54 | 4558 | static int log_kill(pid_t pid, int sig, void *userdata) { |
1d98fef1 LP |
4559 | _cleanup_free_ char *comm = NULL; |
4560 | ||
4561 | (void) get_process_comm(pid, &comm); | |
4562 | ||
4563 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4564 | only, like for example systemd's own PAM stub process. */ | |
4565 | if (comm && comm[0] == '(') | |
c53d2d54 | 4566 | return 0; |
1d98fef1 LP |
4567 | |
4568 | log_unit_notice(userdata, | |
4569 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4570 | pid, | |
4571 | strna(comm), | |
4572 | signal_to_string(sig)); | |
c53d2d54 DB |
4573 | |
4574 | return 1; | |
1d98fef1 LP |
4575 | } |
4576 | ||
4577 | static int operation_to_signal(KillContext *c, KillOperation k) { | |
4578 | assert(c); | |
4579 | ||
4580 | switch (k) { | |
4581 | ||
4582 | case KILL_TERMINATE: | |
4583 | case KILL_TERMINATE_AND_LOG: | |
4584 | return c->kill_signal; | |
4585 | ||
4586 | case KILL_KILL: | |
fbb48d4c | 4587 | return c->final_kill_signal; |
1d98fef1 | 4588 | |
c87700a1 AZ |
4589 | case KILL_WATCHDOG: |
4590 | return c->watchdog_signal; | |
1d98fef1 LP |
4591 | |
4592 | default: | |
4593 | assert_not_reached("KillOperation unknown"); | |
4594 | } | |
4595 | } | |
4596 | ||
cd2086fe LP |
4597 | int unit_kill_context( |
4598 | Unit *u, | |
4599 | KillContext *c, | |
db2cb23b | 4600 | KillOperation k, |
cd2086fe LP |
4601 | pid_t main_pid, |
4602 | pid_t control_pid, | |
4603 | bool main_pid_alien) { | |
4604 | ||
1d98fef1 | 4605 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4606 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4607 | int sig, r; |
cd2086fe LP |
4608 | |
4609 | assert(u); | |
4610 | assert(c); | |
4611 | ||
59ec09a8 ZJS |
4612 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. |
4613 | * Returns > 0 if we killed something worth waiting for, 0 otherwise. */ | |
1d98fef1 | 4614 | |
cd2086fe LP |
4615 | if (c->kill_mode == KILL_NONE) |
4616 | return 0; | |
4617 | ||
1d98fef1 LP |
4618 | sig = operation_to_signal(c, k); |
4619 | ||
4620 | send_sighup = | |
4621 | c->send_sighup && | |
4622 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4623 | sig != SIGHUP; | |
4624 | ||
59ec09a8 ZJS |
4625 | if (k != KILL_TERMINATE || IN_SET(sig, SIGKILL, SIGABRT)) |
4626 | log_func = log_kill; | |
cd2086fe LP |
4627 | |
4628 | if (main_pid > 0) { | |
1d98fef1 LP |
4629 | if (log_func) |
4630 | log_func(main_pid, sig, u); | |
cd2086fe | 4631 | |
1d98fef1 | 4632 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4633 | if (r < 0 && r != -ESRCH) { |
4634 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4635 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 4636 | |
b821a397 | 4637 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 4638 | } else { |
bc6aed7b LP |
4639 | if (!main_pid_alien) |
4640 | wait_for_exit = true; | |
82659fd7 | 4641 | |
1d98fef1 | 4642 | if (r != -ESRCH && send_sighup) |
d0667321 | 4643 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 4644 | } |
cd2086fe LP |
4645 | } |
4646 | ||
4647 | if (control_pid > 0) { | |
1d98fef1 LP |
4648 | if (log_func) |
4649 | log_func(control_pid, sig, u); | |
cd2086fe | 4650 | |
1d98fef1 | 4651 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4652 | if (r < 0 && r != -ESRCH) { |
4653 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4654 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 4655 | |
b821a397 | 4656 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 4657 | } else { |
cd2086fe | 4658 | wait_for_exit = true; |
82659fd7 | 4659 | |
1d98fef1 | 4660 | if (r != -ESRCH && send_sighup) |
d0667321 | 4661 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 4662 | } |
cd2086fe LP |
4663 | } |
4664 | ||
b821a397 LP |
4665 | if (u->cgroup_path && |
4666 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4667 | _cleanup_set_free_ Set *pid_set = NULL; |
4668 | ||
82659fd7 LP |
4669 | /* Exclude the main/control pids from being killed via the cgroup */ |
4670 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4671 | if (!pid_set) |
4672 | return -ENOMEM; | |
4673 | ||
1d98fef1 LP |
4674 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4675 | sig, | |
4676 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4677 | pid_set, | |
4678 | log_func, u); | |
cd2086fe | 4679 | if (r < 0) { |
4c701096 | 4680 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
b821a397 LP |
4681 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
4682 | ||
82659fd7 | 4683 | } else if (r > 0) { |
bc6aed7b | 4684 | |
1d9cc876 LP |
4685 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4686 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
4687 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
4688 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
4689 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
4690 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 4691 | |
c22800e4 | 4692 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 4693 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 4694 | wait_for_exit = true; |
58ea275a | 4695 | |
1d98fef1 | 4696 | if (send_sighup) { |
82659fd7 LP |
4697 | set_free(pid_set); |
4698 | ||
4699 | pid_set = unit_pid_set(main_pid, control_pid); | |
4700 | if (!pid_set) | |
4701 | return -ENOMEM; | |
4702 | ||
1d98fef1 LP |
4703 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4704 | SIGHUP, | |
4705 | CGROUP_IGNORE_SELF, | |
4706 | pid_set, | |
4707 | NULL, NULL); | |
82659fd7 LP |
4708 | } |
4709 | } | |
cd2086fe LP |
4710 | } |
4711 | ||
4712 | return wait_for_exit; | |
4713 | } | |
4714 | ||
eef85c4a | 4715 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
ca8700e9 | 4716 | _cleanup_free_ char *p = NULL; |
eef85c4a | 4717 | UnitDependencyInfo di; |
a57f7e2c LP |
4718 | int r; |
4719 | ||
4720 | assert(u); | |
4721 | assert(path); | |
4722 | ||
eef85c4a LP |
4723 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in |
4724 | * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to | |
4725 | * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily | |
4726 | * determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4727 | |
70b64bd3 ZJS |
4728 | if (!path_is_absolute(path)) |
4729 | return -EINVAL; | |
4730 | ||
548f6937 | 4731 | r = hashmap_ensure_allocated(&u->requires_mounts_for, &path_hash_ops); |
eef85c4a LP |
4732 | if (r < 0) |
4733 | return r; | |
4734 | ||
a57f7e2c LP |
4735 | p = strdup(path); |
4736 | if (!p) | |
4737 | return -ENOMEM; | |
4738 | ||
106bf8e4 | 4739 | path = path_simplify(p, true); |
a57f7e2c | 4740 | |
ca8700e9 | 4741 | if (!path_is_normalized(path)) |
a57f7e2c | 4742 | return -EPERM; |
a57f7e2c | 4743 | |
ca8700e9 | 4744 | if (hashmap_contains(u->requires_mounts_for, path)) |
a57f7e2c | 4745 | return 0; |
a57f7e2c | 4746 | |
eef85c4a LP |
4747 | di = (UnitDependencyInfo) { |
4748 | .origin_mask = mask | |
4749 | }; | |
4750 | ||
ca8700e9 ZJS |
4751 | r = hashmap_put(u->requires_mounts_for, path, di.data); |
4752 | if (r < 0) | |
a57f7e2c | 4753 | return r; |
ca8700e9 | 4754 | p = NULL; |
a57f7e2c | 4755 | |
4cb06c59 | 4756 | char prefix[strlen(path) + 1]; |
ca8700e9 | 4757 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
a57f7e2c LP |
4758 | Set *x; |
4759 | ||
4760 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4761 | if (!x) { | |
ca8700e9 | 4762 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 4763 | |
548f6937 | 4764 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
742f41ad LP |
4765 | if (r < 0) |
4766 | return r; | |
a57f7e2c LP |
4767 | |
4768 | q = strdup(prefix); | |
4769 | if (!q) | |
4770 | return -ENOMEM; | |
4771 | ||
d5099efc | 4772 | x = set_new(NULL); |
ca8700e9 | 4773 | if (!x) |
a57f7e2c | 4774 | return -ENOMEM; |
a57f7e2c LP |
4775 | |
4776 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4777 | if (r < 0) { | |
a57f7e2c LP |
4778 | set_free(x); |
4779 | return r; | |
4780 | } | |
ca8700e9 | 4781 | q = NULL; |
a57f7e2c LP |
4782 | } |
4783 | ||
4784 | r = set_put(x, u); | |
4785 | if (r < 0) | |
4786 | return r; | |
4787 | } | |
4788 | ||
4789 | return 0; | |
4790 | } | |
4791 | ||
613b411c LP |
4792 | int unit_setup_exec_runtime(Unit *u) { |
4793 | ExecRuntime **rt; | |
4794 | size_t offset; | |
613b411c | 4795 | Unit *other; |
eef85c4a LP |
4796 | Iterator i; |
4797 | void *v; | |
e8a565cb | 4798 | int r; |
613b411c LP |
4799 | |
4800 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4801 | assert(offset > 0); | |
4802 | ||
06b643e7 | 4803 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
4804 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
4805 | if (*rt) | |
4806 | return 0; | |
4807 | ||
4808 | /* Try to get it from somebody else */ | |
eef85c4a | 4809 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { |
e8a565cb YW |
4810 | r = exec_runtime_acquire(u->manager, NULL, other->id, false, rt); |
4811 | if (r == 1) | |
4812 | return 1; | |
613b411c LP |
4813 | } |
4814 | ||
e8a565cb | 4815 | return exec_runtime_acquire(u->manager, unit_get_exec_context(u), u->id, true, rt); |
613b411c LP |
4816 | } |
4817 | ||
29206d46 LP |
4818 | int unit_setup_dynamic_creds(Unit *u) { |
4819 | ExecContext *ec; | |
4820 | DynamicCreds *dcreds; | |
4821 | size_t offset; | |
4822 | ||
4823 | assert(u); | |
4824 | ||
4825 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
4826 | assert(offset > 0); | |
4827 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
4828 | ||
4829 | ec = unit_get_exec_context(u); | |
4830 | assert(ec); | |
4831 | ||
4832 | if (!ec->dynamic_user) | |
4833 | return 0; | |
4834 | ||
4835 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
4836 | } | |
4837 | ||
1c2e9646 LP |
4838 | bool unit_type_supported(UnitType t) { |
4839 | if (_unlikely_(t < 0)) | |
4840 | return false; | |
4841 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
4842 | return false; | |
4843 | ||
4844 | if (!unit_vtable[t]->supported) | |
4845 | return true; | |
4846 | ||
4847 | return unit_vtable[t]->supported(); | |
4848 | } | |
4849 | ||
8b4305c7 LP |
4850 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
4851 | int r; | |
4852 | ||
4853 | assert(u); | |
4854 | assert(where); | |
4855 | ||
4856 | r = dir_is_empty(where); | |
3f602115 | 4857 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
4858 | return; |
4859 | if (r < 0) { | |
4860 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
4861 | return; | |
4862 | } | |
4863 | ||
4864 | log_struct(LOG_NOTICE, | |
2b044526 | 4865 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4866 | LOG_UNIT_ID(u), |
f1c50bec | 4867 | LOG_UNIT_INVOCATION_ID(u), |
8b4305c7 | 4868 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), |
a1230ff9 | 4869 | "WHERE=%s", where); |
8b4305c7 LP |
4870 | } |
4871 | ||
25cd4964 | 4872 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
58d9d89b | 4873 | _cleanup_free_ char *canonical_where = NULL; |
8b4305c7 LP |
4874 | int r; |
4875 | ||
4876 | assert(u); | |
4877 | assert(where); | |
4878 | ||
25cd4964 | 4879 | r = chase_symlinks(where, NULL, CHASE_NONEXISTENT, &canonical_where); |
8b4305c7 | 4880 | if (r < 0) { |
25cd4964 | 4881 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
4882 | return 0; |
4883 | } | |
25cd4964 AJ |
4884 | |
4885 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
4886 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
4887 | return 0; |
4888 | ||
25cd4964 | 4889 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
8b4305c7 | 4890 | log_struct(LOG_ERR, |
2b044526 | 4891 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4892 | LOG_UNIT_ID(u), |
f1c50bec | 4893 | LOG_UNIT_INVOCATION_ID(u), |
25cd4964 | 4894 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), |
a1230ff9 | 4895 | "WHERE=%s", where); |
8b4305c7 LP |
4896 | |
4897 | return -ELOOP; | |
4898 | } | |
0f13f3bd LP |
4899 | |
4900 | bool unit_is_pristine(Unit *u) { | |
4901 | assert(u); | |
4902 | ||
7c65093a | 4903 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
4904 | * in a number of different ways. Note that to cater for unit |
4905 | * types such as slice, we are generally fine with units that | |
e9e8cbc8 ZJS |
4906 | * are marked UNIT_LOADED even though nothing was actually |
4907 | * loaded, as those unit types don't require a file on disk. */ | |
0f13f3bd LP |
4908 | |
4909 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
4910 | u->fragment_path || | |
4911 | u->source_path || | |
4912 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
4913 | u->job || |
4914 | u->merged_into); | |
4915 | } | |
291d565a LP |
4916 | |
4917 | pid_t unit_control_pid(Unit *u) { | |
4918 | assert(u); | |
4919 | ||
4920 | if (UNIT_VTABLE(u)->control_pid) | |
4921 | return UNIT_VTABLE(u)->control_pid(u); | |
4922 | ||
4923 | return 0; | |
4924 | } | |
4925 | ||
4926 | pid_t unit_main_pid(Unit *u) { | |
4927 | assert(u); | |
4928 | ||
4929 | if (UNIT_VTABLE(u)->main_pid) | |
4930 | return UNIT_VTABLE(u)->main_pid(u); | |
4931 | ||
4932 | return 0; | |
4933 | } | |
00d9ef85 LP |
4934 | |
4935 | static void unit_unref_uid_internal( | |
4936 | Unit *u, | |
4937 | uid_t *ref_uid, | |
4938 | bool destroy_now, | |
4939 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
4940 | ||
4941 | assert(u); | |
4942 | assert(ref_uid); | |
4943 | assert(_manager_unref_uid); | |
4944 | ||
4945 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
4946 | * gid_t are actually the same time, with the same validity rules. | |
4947 | * | |
4948 | * Drops a reference to UID/GID from a unit. */ | |
4949 | ||
4950 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4951 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4952 | ||
4953 | if (!uid_is_valid(*ref_uid)) | |
4954 | return; | |
4955 | ||
4956 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
4957 | *ref_uid = UID_INVALID; | |
4958 | } | |
4959 | ||
4960 | void unit_unref_uid(Unit *u, bool destroy_now) { | |
4961 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); | |
4962 | } | |
4963 | ||
4964 | void unit_unref_gid(Unit *u, bool destroy_now) { | |
4965 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); | |
4966 | } | |
4967 | ||
4968 | static int unit_ref_uid_internal( | |
4969 | Unit *u, | |
4970 | uid_t *ref_uid, | |
4971 | uid_t uid, | |
4972 | bool clean_ipc, | |
4973 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
4974 | ||
4975 | int r; | |
4976 | ||
4977 | assert(u); | |
4978 | assert(ref_uid); | |
4979 | assert(uid_is_valid(uid)); | |
4980 | assert(_manager_ref_uid); | |
4981 | ||
4982 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
4983 | * are actually the same type, and have the same validity rules. | |
4984 | * | |
4985 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
4986 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
4987 | * drops to zero. */ | |
4988 | ||
4989 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4990 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4991 | ||
4992 | if (*ref_uid == uid) | |
4993 | return 0; | |
4994 | ||
4995 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
4996 | return -EBUSY; | |
4997 | ||
4998 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
4999 | if (r < 0) | |
5000 | return r; | |
5001 | ||
5002 | *ref_uid = uid; | |
5003 | return 1; | |
5004 | } | |
5005 | ||
5006 | int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { | |
5007 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); | |
5008 | } | |
5009 | ||
5010 | int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { | |
5011 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); | |
5012 | } | |
5013 | ||
5014 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
5015 | int r = 0, q = 0; | |
5016 | ||
5017 | assert(u); | |
5018 | ||
5019 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
5020 | ||
5021 | if (uid_is_valid(uid)) { | |
5022 | r = unit_ref_uid(u, uid, clean_ipc); | |
5023 | if (r < 0) | |
5024 | return r; | |
5025 | } | |
5026 | ||
5027 | if (gid_is_valid(gid)) { | |
5028 | q = unit_ref_gid(u, gid, clean_ipc); | |
5029 | if (q < 0) { | |
5030 | if (r > 0) | |
5031 | unit_unref_uid(u, false); | |
5032 | ||
5033 | return q; | |
5034 | } | |
5035 | } | |
5036 | ||
5037 | return r > 0 || q > 0; | |
5038 | } | |
5039 | ||
5040 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
5041 | ExecContext *c; | |
5042 | int r; | |
5043 | ||
5044 | assert(u); | |
5045 | ||
5046 | c = unit_get_exec_context(u); | |
5047 | ||
5048 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
5049 | if (r < 0) | |
5050 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
5051 | ||
5052 | return r; | |
5053 | } | |
5054 | ||
5055 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { | |
5056 | assert(u); | |
5057 | ||
5058 | unit_unref_uid(u, destroy_now); | |
5059 | unit_unref_gid(u, destroy_now); | |
5060 | } | |
5061 | ||
5062 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { | |
5063 | int r; | |
5064 | ||
5065 | assert(u); | |
5066 | ||
5067 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
5068 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
5069 | * objects when no service references the UID/GID anymore. */ | |
5070 | ||
5071 | r = unit_ref_uid_gid(u, uid, gid); | |
5072 | if (r > 0) | |
37d0b962 | 5073 | unit_add_to_dbus_queue(u); |
00d9ef85 | 5074 | } |
4b58153d LP |
5075 | |
5076 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { | |
5077 | int r; | |
5078 | ||
5079 | assert(u); | |
5080 | ||
5081 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
5082 | ||
5083 | if (sd_id128_equal(u->invocation_id, id)) | |
5084 | return 0; | |
5085 | ||
5086 | if (!sd_id128_is_null(u->invocation_id)) | |
5087 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
5088 | ||
5089 | if (sd_id128_is_null(id)) { | |
5090 | r = 0; | |
5091 | goto reset; | |
5092 | } | |
5093 | ||
5094 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
5095 | if (r < 0) | |
5096 | goto reset; | |
5097 | ||
5098 | u->invocation_id = id; | |
5099 | sd_id128_to_string(id, u->invocation_id_string); | |
5100 | ||
5101 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
5102 | if (r < 0) | |
5103 | goto reset; | |
5104 | ||
5105 | return 0; | |
5106 | ||
5107 | reset: | |
5108 | u->invocation_id = SD_ID128_NULL; | |
5109 | u->invocation_id_string[0] = 0; | |
5110 | return r; | |
5111 | } | |
5112 | ||
5113 | int unit_acquire_invocation_id(Unit *u) { | |
5114 | sd_id128_t id; | |
5115 | int r; | |
5116 | ||
5117 | assert(u); | |
5118 | ||
5119 | r = sd_id128_randomize(&id); | |
5120 | if (r < 0) | |
5121 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
5122 | ||
5123 | r = unit_set_invocation_id(u, id); | |
5124 | if (r < 0) | |
5125 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
5126 | ||
af92c603 | 5127 | unit_add_to_dbus_queue(u); |
4b58153d LP |
5128 | return 0; |
5129 | } | |
f0d47797 | 5130 | |
1ad6e8b3 LP |
5131 | int unit_set_exec_params(Unit *u, ExecParameters *p) { |
5132 | int r; | |
5133 | ||
7960b0c7 LP |
5134 | assert(u); |
5135 | assert(p); | |
f0d47797 | 5136 | |
004c7f16 | 5137 | /* Copy parameters from manager */ |
1ad6e8b3 LP |
5138 | r = manager_get_effective_environment(u->manager, &p->environment); |
5139 | if (r < 0) | |
5140 | return r; | |
5141 | ||
004c7f16 LP |
5142 | p->confirm_spawn = manager_get_confirm_spawn(u->manager); |
5143 | p->cgroup_supported = u->manager->cgroup_supported; | |
5144 | p->prefix = u->manager->prefix; | |
5145 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
5146 | ||
5238e957 | 5147 | /* Copy parameters from unit */ |
7960b0c7 | 5148 | p->cgroup_path = u->cgroup_path; |
1d9cc876 | 5149 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
1ad6e8b3 LP |
5150 | |
5151 | return 0; | |
f0d47797 | 5152 | } |
a79279c7 | 5153 | |
4c253ed1 | 5154 | int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) { |
a79279c7 LP |
5155 | int r; |
5156 | ||
5157 | assert(u); | |
5158 | assert(ret); | |
5159 | ||
5160 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
5161 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
5162 | ||
5163 | (void) unit_realize_cgroup(u); | |
5164 | ||
4c253ed1 LP |
5165 | r = safe_fork(name, FORK_REOPEN_LOG, ret); |
5166 | if (r != 0) | |
5167 | return r; | |
a79279c7 | 5168 | |
4c253ed1 LP |
5169 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); |
5170 | (void) ignore_signals(SIGPIPE, -1); | |
a79279c7 | 5171 | |
4c253ed1 | 5172 | (void) prctl(PR_SET_PDEATHSIG, SIGTERM); |
a79279c7 | 5173 | |
4c253ed1 LP |
5174 | if (u->cgroup_path) { |
5175 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
5176 | if (r < 0) { | |
5177 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", u->cgroup_path); | |
5178 | _exit(EXIT_CGROUP); | |
a79279c7 | 5179 | } |
a79279c7 LP |
5180 | } |
5181 | ||
4c253ed1 | 5182 | return 0; |
a79279c7 | 5183 | } |
c999cf38 LP |
5184 | |
5185 | static void unit_update_dependency_mask(Unit *u, UnitDependency d, Unit *other, UnitDependencyInfo di) { | |
5186 | assert(u); | |
5187 | assert(d >= 0); | |
5188 | assert(d < _UNIT_DEPENDENCY_MAX); | |
5189 | assert(other); | |
5190 | ||
5191 | if (di.origin_mask == 0 && di.destination_mask == 0) { | |
5192 | /* No bit set anymore, let's drop the whole entry */ | |
5193 | assert_se(hashmap_remove(u->dependencies[d], other)); | |
5194 | log_unit_debug(u, "%s lost dependency %s=%s", u->id, unit_dependency_to_string(d), other->id); | |
5195 | } else | |
5196 | /* Mask was reduced, let's update the entry */ | |
5197 | assert_se(hashmap_update(u->dependencies[d], other, di.data) == 0); | |
5198 | } | |
5199 | ||
5200 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
5201 | UnitDependency d; | |
5202 | ||
5203 | assert(u); | |
5204 | ||
5205 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5206 | ||
5207 | if (mask == 0) | |
5208 | return; | |
5209 | ||
5210 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
5211 | bool done; | |
5212 | ||
5213 | do { | |
5214 | UnitDependencyInfo di; | |
5215 | Unit *other; | |
5216 | Iterator i; | |
5217 | ||
5218 | done = true; | |
5219 | ||
5220 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { | |
5221 | UnitDependency q; | |
5222 | ||
5223 | if ((di.origin_mask & ~mask) == di.origin_mask) | |
5224 | continue; | |
5225 | di.origin_mask &= ~mask; | |
5226 | unit_update_dependency_mask(u, d, other, di); | |
5227 | ||
5228 | /* We updated the dependency from our unit to the other unit now. But most dependencies | |
5229 | * imply a reverse dependency. Hence, let's delete that one too. For that we go through | |
5230 | * all dependency types on the other unit and delete all those which point to us and | |
5231 | * have the right mask set. */ | |
5232 | ||
5233 | for (q = 0; q < _UNIT_DEPENDENCY_MAX; q++) { | |
5234 | UnitDependencyInfo dj; | |
5235 | ||
5236 | dj.data = hashmap_get(other->dependencies[q], u); | |
5237 | if ((dj.destination_mask & ~mask) == dj.destination_mask) | |
5238 | continue; | |
5239 | dj.destination_mask &= ~mask; | |
5240 | ||
5241 | unit_update_dependency_mask(other, q, u, dj); | |
5242 | } | |
5243 | ||
5244 | unit_add_to_gc_queue(other); | |
5245 | ||
5246 | done = false; | |
5247 | break; | |
5248 | } | |
5249 | ||
5250 | } while (!done); | |
5251 | } | |
5252 | } | |
d3070fbd LP |
5253 | |
5254 | static int unit_export_invocation_id(Unit *u) { | |
5255 | const char *p; | |
5256 | int r; | |
5257 | ||
5258 | assert(u); | |
5259 | ||
5260 | if (u->exported_invocation_id) | |
5261 | return 0; | |
5262 | ||
5263 | if (sd_id128_is_null(u->invocation_id)) | |
5264 | return 0; | |
5265 | ||
5266 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
5267 | r = symlink_atomic(u->invocation_id_string, p); | |
5268 | if (r < 0) | |
5269 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5270 | ||
5271 | u->exported_invocation_id = true; | |
5272 | return 0; | |
5273 | } | |
5274 | ||
5275 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5276 | const char *p; | |
5277 | char buf[2]; | |
5278 | int r; | |
5279 | ||
5280 | assert(u); | |
5281 | assert(c); | |
5282 | ||
5283 | if (u->exported_log_level_max) | |
5284 | return 0; | |
5285 | ||
5286 | if (c->log_level_max < 0) | |
5287 | return 0; | |
5288 | ||
5289 | assert(c->log_level_max <= 7); | |
5290 | ||
5291 | buf[0] = '0' + c->log_level_max; | |
5292 | buf[1] = 0; | |
5293 | ||
5294 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5295 | r = symlink_atomic(buf, p); | |
5296 | if (r < 0) | |
5297 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5298 | ||
5299 | u->exported_log_level_max = true; | |
5300 | return 0; | |
5301 | } | |
5302 | ||
5303 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5304 | _cleanup_close_ int fd = -1; | |
5305 | struct iovec *iovec; | |
5306 | const char *p; | |
5307 | char *pattern; | |
5308 | le64_t *sizes; | |
5309 | ssize_t n; | |
5310 | size_t i; | |
5311 | int r; | |
5312 | ||
5313 | if (u->exported_log_extra_fields) | |
5314 | return 0; | |
5315 | ||
5316 | if (c->n_log_extra_fields <= 0) | |
5317 | return 0; | |
5318 | ||
5319 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5320 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5321 | ||
5322 | for (i = 0; i < c->n_log_extra_fields; i++) { | |
5323 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); | |
5324 | ||
5325 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5326 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5327 | } | |
5328 | ||
5329 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5330 | pattern = strjoina(p, ".XXXXXX"); | |
5331 | ||
5332 | fd = mkostemp_safe(pattern); | |
5333 | if (fd < 0) | |
5334 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5335 | ||
5336 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5337 | if (n < 0) { | |
5338 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5339 | goto fail; | |
5340 | } | |
5341 | ||
5342 | (void) fchmod(fd, 0644); | |
5343 | ||
5344 | if (rename(pattern, p) < 0) { | |
5345 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5346 | goto fail; | |
5347 | } | |
5348 | ||
5349 | u->exported_log_extra_fields = true; | |
5350 | return 0; | |
5351 | ||
5352 | fail: | |
5353 | (void) unlink(pattern); | |
5354 | return r; | |
5355 | } | |
5356 | ||
90fc172e AZ |
5357 | static int unit_export_log_rate_limit_interval(Unit *u, const ExecContext *c) { |
5358 | _cleanup_free_ char *buf = NULL; | |
5359 | const char *p; | |
5360 | int r; | |
5361 | ||
5362 | assert(u); | |
5363 | assert(c); | |
5364 | ||
5365 | if (u->exported_log_rate_limit_interval) | |
5366 | return 0; | |
5367 | ||
5368 | if (c->log_rate_limit_interval_usec == 0) | |
5369 | return 0; | |
5370 | ||
5371 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5372 | ||
5373 | if (asprintf(&buf, "%" PRIu64, c->log_rate_limit_interval_usec) < 0) | |
5374 | return log_oom(); | |
5375 | ||
5376 | r = symlink_atomic(buf, p); | |
5377 | if (r < 0) | |
5378 | return log_unit_debug_errno(u, r, "Failed to create log rate limit interval symlink %s: %m", p); | |
5379 | ||
5380 | u->exported_log_rate_limit_interval = true; | |
5381 | return 0; | |
5382 | } | |
5383 | ||
5384 | static int unit_export_log_rate_limit_burst(Unit *u, const ExecContext *c) { | |
5385 | _cleanup_free_ char *buf = NULL; | |
5386 | const char *p; | |
5387 | int r; | |
5388 | ||
5389 | assert(u); | |
5390 | assert(c); | |
5391 | ||
5392 | if (u->exported_log_rate_limit_burst) | |
5393 | return 0; | |
5394 | ||
5395 | if (c->log_rate_limit_burst == 0) | |
5396 | return 0; | |
5397 | ||
5398 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5399 | ||
5400 | if (asprintf(&buf, "%u", c->log_rate_limit_burst) < 0) | |
5401 | return log_oom(); | |
5402 | ||
5403 | r = symlink_atomic(buf, p); | |
5404 | if (r < 0) | |
5405 | return log_unit_debug_errno(u, r, "Failed to create log rate limit burst symlink %s: %m", p); | |
5406 | ||
5407 | u->exported_log_rate_limit_burst = true; | |
5408 | return 0; | |
5409 | } | |
5410 | ||
d3070fbd LP |
5411 | void unit_export_state_files(Unit *u) { |
5412 | const ExecContext *c; | |
5413 | ||
5414 | assert(u); | |
5415 | ||
5416 | if (!u->id) | |
5417 | return; | |
5418 | ||
5419 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5420 | return; | |
5421 | ||
638cece4 | 5422 | if (MANAGER_IS_TEST_RUN(u->manager)) |
8f632531 LP |
5423 | return; |
5424 | ||
d3070fbd LP |
5425 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5426 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5427 | * the IPC system itself and PID 1 also log to the journal. | |
5428 | * | |
5429 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5430 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5431 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5432 | * namespace at least. | |
5433 | * | |
5434 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5435 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5436 | * them with one. */ | |
5437 | ||
5438 | (void) unit_export_invocation_id(u); | |
5439 | ||
5440 | c = unit_get_exec_context(u); | |
5441 | if (c) { | |
5442 | (void) unit_export_log_level_max(u, c); | |
5443 | (void) unit_export_log_extra_fields(u, c); | |
90fc172e AZ |
5444 | (void) unit_export_log_rate_limit_interval(u, c); |
5445 | (void) unit_export_log_rate_limit_burst(u, c); | |
d3070fbd LP |
5446 | } |
5447 | } | |
5448 | ||
5449 | void unit_unlink_state_files(Unit *u) { | |
5450 | const char *p; | |
5451 | ||
5452 | assert(u); | |
5453 | ||
5454 | if (!u->id) | |
5455 | return; | |
5456 | ||
5457 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5458 | return; | |
5459 | ||
5460 | /* Undoes the effect of unit_export_state() */ | |
5461 | ||
5462 | if (u->exported_invocation_id) { | |
5463 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
5464 | (void) unlink(p); | |
5465 | ||
5466 | u->exported_invocation_id = false; | |
5467 | } | |
5468 | ||
5469 | if (u->exported_log_level_max) { | |
5470 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5471 | (void) unlink(p); | |
5472 | ||
5473 | u->exported_log_level_max = false; | |
5474 | } | |
5475 | ||
5476 | if (u->exported_log_extra_fields) { | |
5477 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5478 | (void) unlink(p); | |
5479 | ||
5480 | u->exported_log_extra_fields = false; | |
5481 | } | |
90fc172e AZ |
5482 | |
5483 | if (u->exported_log_rate_limit_interval) { | |
5484 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5485 | (void) unlink(p); | |
5486 | ||
5487 | u->exported_log_rate_limit_interval = false; | |
5488 | } | |
5489 | ||
5490 | if (u->exported_log_rate_limit_burst) { | |
5491 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5492 | (void) unlink(p); | |
5493 | ||
5494 | u->exported_log_rate_limit_burst = false; | |
5495 | } | |
d3070fbd | 5496 | } |
5afe510c | 5497 | |
3c7416b6 LP |
5498 | int unit_prepare_exec(Unit *u) { |
5499 | int r; | |
5500 | ||
5501 | assert(u); | |
5502 | ||
5503 | /* Prepares everything so that we can fork of a process for this unit */ | |
5504 | ||
5505 | (void) unit_realize_cgroup(u); | |
5506 | ||
5507 | if (u->reset_accounting) { | |
9b2559a1 | 5508 | (void) unit_reset_accounting(u); |
3c7416b6 LP |
5509 | u->reset_accounting = false; |
5510 | } | |
5511 | ||
5512 | unit_export_state_files(u); | |
5513 | ||
5514 | r = unit_setup_exec_runtime(u); | |
5515 | if (r < 0) | |
5516 | return r; | |
5517 | ||
5518 | r = unit_setup_dynamic_creds(u); | |
5519 | if (r < 0) | |
5520 | return r; | |
5521 | ||
5522 | return 0; | |
5523 | } | |
5524 | ||
c53d2d54 | 5525 | static int log_leftover(pid_t pid, int sig, void *userdata) { |
a4634b21 LP |
5526 | _cleanup_free_ char *comm = NULL; |
5527 | ||
5528 | (void) get_process_comm(pid, &comm); | |
5529 | ||
5530 | if (comm && comm[0] == '(') /* Most likely our own helper process (PAM?), ignore */ | |
c53d2d54 | 5531 | return 0; |
a4634b21 LP |
5532 | |
5533 | log_unit_warning(userdata, | |
5534 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5535 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5536 | pid, strna(comm)); | |
c53d2d54 DB |
5537 | |
5538 | return 1; | |
a4634b21 LP |
5539 | } |
5540 | ||
c53d2d54 | 5541 | int unit_warn_leftover_processes(Unit *u) { |
a4634b21 LP |
5542 | assert(u); |
5543 | ||
5544 | (void) unit_pick_cgroup_path(u); | |
5545 | ||
5546 | if (!u->cgroup_path) | |
c53d2d54 | 5547 | return 0; |
a4634b21 | 5548 | |
c53d2d54 | 5549 | return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_leftover, u); |
a4634b21 LP |
5550 | } |
5551 | ||
bb2c7685 LP |
5552 | bool unit_needs_console(Unit *u) { |
5553 | ExecContext *ec; | |
5554 | UnitActiveState state; | |
5555 | ||
5556 | assert(u); | |
5557 | ||
5558 | state = unit_active_state(u); | |
5559 | ||
5560 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5561 | return false; | |
5562 | ||
5563 | if (UNIT_VTABLE(u)->needs_console) | |
5564 | return UNIT_VTABLE(u)->needs_console(u); | |
5565 | ||
5566 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5567 | ec = unit_get_exec_context(u); | |
5568 | if (!ec) | |
5569 | return false; | |
5570 | ||
5571 | return exec_context_may_touch_console(ec); | |
5572 | } | |
5573 | ||
81e9871e LP |
5574 | const char *unit_label_path(Unit *u) { |
5575 | const char *p; | |
5576 | ||
5577 | /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off | |
5578 | * when validating access checks. */ | |
5579 | ||
5580 | p = u->source_path ?: u->fragment_path; | |
5581 | if (!p) | |
5582 | return NULL; | |
5583 | ||
5584 | /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */ | |
5585 | if (path_equal(p, "/dev/null")) | |
5586 | return NULL; | |
5587 | ||
5588 | return p; | |
5589 | } | |
5590 | ||
6592b975 LP |
5591 | int unit_pid_attachable(Unit *u, pid_t pid, sd_bus_error *error) { |
5592 | int r; | |
5593 | ||
5594 | assert(u); | |
5595 | ||
5596 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5597 | * and not a kernel thread either */ | |
5598 | ||
5599 | /* First, a simple range check */ | |
5600 | if (!pid_is_valid(pid)) | |
5601 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier " PID_FMT " is not valid.", pid); | |
5602 | ||
5603 | /* Some extra safety check */ | |
5604 | if (pid == 1 || pid == getpid_cached()) | |
3fe91079 | 5605 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager process, refusing.", pid); |
6592b975 LP |
5606 | |
5607 | /* Don't even begin to bother with kernel threads */ | |
5608 | r = is_kernel_thread(pid); | |
5609 | if (r == -ESRCH) | |
5610 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid); | |
5611 | if (r < 0) | |
5612 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid); | |
5613 | if (r > 0) | |
5614 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid); | |
5615 | ||
5616 | return 0; | |
5617 | } | |
5618 | ||
523ee2d4 LP |
5619 | void unit_log_success(Unit *u) { |
5620 | assert(u); | |
5621 | ||
5622 | log_struct(LOG_INFO, | |
5623 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR, | |
5624 | LOG_UNIT_ID(u), | |
5625 | LOG_UNIT_INVOCATION_ID(u), | |
5626 | LOG_UNIT_MESSAGE(u, "Succeeded.")); | |
5627 | } | |
5628 | ||
7c047d74 LP |
5629 | void unit_log_failure(Unit *u, const char *result) { |
5630 | assert(u); | |
5631 | assert(result); | |
5632 | ||
5633 | log_struct(LOG_WARNING, | |
5634 | "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR, | |
5635 | LOG_UNIT_ID(u), | |
5636 | LOG_UNIT_INVOCATION_ID(u), | |
5637 | LOG_UNIT_MESSAGE(u, "Failed with result '%s'.", result), | |
5638 | "UNIT_RESULT=%s", result); | |
5639 | } | |
5640 | ||
91bbd9b7 LP |
5641 | void unit_log_process_exit( |
5642 | Unit *u, | |
5643 | int level, | |
5644 | const char *kind, | |
5645 | const char *command, | |
5646 | int code, | |
5647 | int status) { | |
5648 | ||
5649 | assert(u); | |
5650 | assert(kind); | |
5651 | ||
5652 | if (code != CLD_EXITED) | |
5653 | level = LOG_WARNING; | |
5654 | ||
5655 | log_struct(level, | |
5656 | "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR, | |
5657 | LOG_UNIT_MESSAGE(u, "%s exited, code=%s, status=%i/%s", | |
5658 | kind, | |
5659 | sigchld_code_to_string(code), status, | |
5660 | strna(code == CLD_EXITED | |
5661 | ? exit_status_to_string(status, EXIT_STATUS_FULL) | |
5662 | : signal_to_string(status))), | |
5663 | "EXIT_CODE=%s", sigchld_code_to_string(code), | |
5664 | "EXIT_STATUS=%i", status, | |
5665 | "COMMAND=%s", strna(command), | |
5666 | LOG_UNIT_ID(u), | |
5667 | LOG_UNIT_INVOCATION_ID(u)); | |
5668 | } | |
5669 | ||
7af67e9a LP |
5670 | int unit_exit_status(Unit *u) { |
5671 | assert(u); | |
5672 | ||
5673 | /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range | |
5674 | * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA | |
5675 | * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main | |
5676 | * service process has exited abnormally (signal/coredump). */ | |
5677 | ||
5678 | if (!UNIT_VTABLE(u)->exit_status) | |
5679 | return -EOPNOTSUPP; | |
5680 | ||
5681 | return UNIT_VTABLE(u)->exit_status(u); | |
5682 | } | |
5683 | ||
5684 | int unit_failure_action_exit_status(Unit *u) { | |
5685 | int r; | |
5686 | ||
5687 | assert(u); | |
5688 | ||
5689 | /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */ | |
5690 | ||
5691 | if (u->failure_action_exit_status >= 0) | |
5692 | return u->failure_action_exit_status; | |
5693 | ||
5694 | r = unit_exit_status(u); | |
5695 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5696 | return 255; | |
5697 | ||
5698 | return r; | |
5699 | } | |
5700 | ||
5701 | int unit_success_action_exit_status(Unit *u) { | |
5702 | int r; | |
5703 | ||
5704 | assert(u); | |
5705 | ||
5706 | /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */ | |
5707 | ||
5708 | if (u->success_action_exit_status >= 0) | |
5709 | return u->success_action_exit_status; | |
5710 | ||
5711 | r = unit_exit_status(u); | |
5712 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5713 | return 255; | |
5714 | ||
5715 | return r; | |
5716 | } | |
5717 | ||
a4191c9f LP |
5718 | int unit_test_trigger_loaded(Unit *u) { |
5719 | Unit *trigger; | |
5720 | ||
5721 | /* Tests whether the unit to trigger is loaded */ | |
5722 | ||
5723 | trigger = UNIT_TRIGGER(u); | |
5724 | if (!trigger) | |
5725 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), "Refusing to start, unit to trigger not loaded."); | |
5726 | if (trigger->load_state != UNIT_LOADED) | |
5727 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), "Refusing to start, unit %s to trigger not loaded.", u->id); | |
5728 | ||
5729 | return 0; | |
5730 | } | |
5731 | ||
5afe510c LP |
5732 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
5733 | [COLLECT_INACTIVE] = "inactive", | |
5734 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
5735 | }; | |
5736 | ||
5737 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); |