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Commit | Line | Data |
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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
6c12b52e LP |
2 | |
3 | #include <errno.h> | |
6c12b52e LP |
4 | #include <unistd.h> |
5 | ||
b5efdb8a | 6 | #include "alloc-util.h" |
dafb4063 | 7 | #include "cgroup-setup.h" |
07630cea | 8 | #include "dbus-scope.h" |
6fcbec6f | 9 | #include "dbus-unit.h" |
03860190 | 10 | #include "exit-status.h" |
07630cea | 11 | #include "load-dropin.h" |
6c12b52e | 12 | #include "log.h" |
428a9f6f | 13 | #include "process-util.h" |
5918a933 | 14 | #include "random-util.h" |
b5efdb8a | 15 | #include "scope.h" |
d68c645b | 16 | #include "serialize.h" |
6c12b52e | 17 | #include "special.h" |
8b43440b | 18 | #include "string-table.h" |
07630cea LP |
19 | #include "string-util.h" |
20 | #include "strv.h" | |
6c12b52e | 21 | #include "unit-name.h" |
efdb0237 | 22 | #include "unit.h" |
03860190 | 23 | #include "user-util.h" |
6c12b52e LP |
24 | |
25 | static const UnitActiveState state_translation_table[_SCOPE_STATE_MAX] = { | |
26 | [SCOPE_DEAD] = UNIT_INACTIVE, | |
03860190 | 27 | [SCOPE_START_CHOWN] = UNIT_ACTIVATING, |
6c12b52e | 28 | [SCOPE_RUNNING] = UNIT_ACTIVE, |
a911bb9a | 29 | [SCOPE_ABANDONED] = UNIT_ACTIVE, |
6c12b52e LP |
30 | [SCOPE_STOP_SIGTERM] = UNIT_DEACTIVATING, |
31 | [SCOPE_STOP_SIGKILL] = UNIT_DEACTIVATING, | |
32 | [SCOPE_FAILED] = UNIT_FAILED | |
33 | }; | |
34 | ||
718db961 LP |
35 | static int scope_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); |
36 | ||
6c12b52e LP |
37 | static void scope_init(Unit *u) { |
38 | Scope *s = SCOPE(u); | |
39 | ||
40 | assert(u); | |
41 | assert(u->load_state == UNIT_STUB); | |
42 | ||
9ed7de60 | 43 | s->runtime_max_usec = USEC_INFINITY; |
1f19a534 | 44 | s->timeout_stop_usec = u->manager->default_timeout_stop_usec; |
1b4cd0cf | 45 | u->ignore_on_isolate = true; |
03860190 | 46 | s->user = s->group = NULL; |
5fa09835 | 47 | s->oom_policy = _OOM_POLICY_INVALID; |
6c12b52e LP |
48 | } |
49 | ||
50 | static void scope_done(Unit *u) { | |
51 | Scope *s = SCOPE(u); | |
52 | ||
53 | assert(u); | |
54 | ||
371c0b79 LP |
55 | s->controller = mfree(s->controller); |
56 | s->controller_track = sd_bus_track_unref(s->controller_track); | |
2d4a39e7 | 57 | |
5dcadb4c | 58 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); |
03860190 MS |
59 | |
60 | s->user = mfree(s->user); | |
61 | s->group = mfree(s->group); | |
718db961 LP |
62 | } |
63 | ||
ecea250d | 64 | static usec_t scope_running_timeout(Scope *s) { |
5918a933 AB |
65 | usec_t delta = 0; |
66 | ||
67 | assert(s); | |
68 | ||
69 | if (s->runtime_rand_extra_usec != 0) { | |
70 | delta = random_u64_range(s->runtime_rand_extra_usec); | |
71 | log_unit_debug(UNIT(s), "Adding delta of %s sec to timeout", FORMAT_TIMESPAN(delta, USEC_PER_SEC)); | |
72 | } | |
73 | ||
74 | return usec_add(usec_add(UNIT(s)->active_enter_timestamp.monotonic, | |
75 | s->runtime_max_usec), | |
76 | delta); | |
77 | } | |
78 | ||
36c16a7c | 79 | static int scope_arm_timer(Scope *s, usec_t usec) { |
718db961 LP |
80 | int r; |
81 | ||
82 | assert(s); | |
83 | ||
718db961 | 84 | if (s->timer_event_source) { |
36c16a7c | 85 | r = sd_event_source_set_time(s->timer_event_source, usec); |
718db961 LP |
86 | if (r < 0) |
87 | return r; | |
88 | ||
89 | return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT); | |
90 | } | |
91 | ||
36c16a7c LP |
92 | if (usec == USEC_INFINITY) |
93 | return 0; | |
94 | ||
cbf60d0a | 95 | r = sd_event_add_time( |
6a0f1f6d LP |
96 | UNIT(s)->manager->event, |
97 | &s->timer_event_source, | |
98 | CLOCK_MONOTONIC, | |
36c16a7c | 99 | usec, 0, |
6a0f1f6d | 100 | scope_dispatch_timer, s); |
7dfbe2e3 TG |
101 | if (r < 0) |
102 | return r; | |
103 | ||
104 | (void) sd_event_source_set_description(s->timer_event_source, "scope-timer"); | |
105 | ||
106 | return 0; | |
6c12b52e LP |
107 | } |
108 | ||
109 | static void scope_set_state(Scope *s, ScopeState state) { | |
110 | ScopeState old_state; | |
111 | assert(s); | |
112 | ||
6fcbec6f LP |
113 | if (s->state != state) |
114 | bus_unit_send_pending_change_signal(UNIT(s), false); | |
115 | ||
6c12b52e LP |
116 | old_state = s->state; |
117 | s->state = state; | |
118 | ||
e1f85b49 | 119 | if (!IN_SET(state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL, SCOPE_START_CHOWN, SCOPE_RUNNING)) |
5dcadb4c | 120 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); |
6c12b52e | 121 | |
50be4f4a | 122 | if (IN_SET(state, SCOPE_DEAD, SCOPE_FAILED)) { |
a911bb9a | 123 | unit_unwatch_all_pids(UNIT(s)); |
50be4f4a LP |
124 | unit_dequeue_rewatch_pids(UNIT(s)); |
125 | } | |
a911bb9a | 126 | |
6c12b52e | 127 | if (state != old_state) |
a911bb9a | 128 | log_debug("%s changed %s -> %s", UNIT(s)->id, scope_state_to_string(old_state), scope_state_to_string(state)); |
6c12b52e | 129 | |
2ad2e41a | 130 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], 0); |
6c12b52e LP |
131 | } |
132 | ||
133 | static int scope_add_default_dependencies(Scope *s) { | |
134 | int r; | |
135 | ||
136 | assert(s); | |
137 | ||
4c9ea260 LP |
138 | if (!UNIT(s)->default_dependencies) |
139 | return 0; | |
140 | ||
6c12b52e LP |
141 | /* Make sure scopes are unloaded on shutdown */ |
142 | r = unit_add_two_dependencies_by_name( | |
143 | UNIT(s), | |
144 | UNIT_BEFORE, UNIT_CONFLICTS, | |
5a724170 | 145 | SPECIAL_SHUTDOWN_TARGET, true, |
eef85c4a | 146 | UNIT_DEPENDENCY_DEFAULT); |
6c12b52e LP |
147 | if (r < 0) |
148 | return r; | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | static int scope_verify(Scope *s) { | |
154 | assert(s); | |
75193d41 | 155 | assert(UNIT(s)->load_state == UNIT_LOADED); |
6c12b52e | 156 | |
efdb0237 | 157 | if (set_isempty(UNIT(s)->pids) && |
2c289ea8 | 158 | !MANAGER_IS_RELOADING(UNIT(s)->manager) && |
d85ff944 YW |
159 | !unit_has_name(UNIT(s), SPECIAL_INIT_SCOPE)) |
160 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOENT), "Scope has no PIDs. Refusing."); | |
6c12b52e LP |
161 | |
162 | return 0; | |
163 | } | |
164 | ||
8e4e851f LP |
165 | static int scope_load_init_scope(Unit *u) { |
166 | assert(u); | |
167 | ||
168 | if (!unit_has_name(u, SPECIAL_INIT_SCOPE)) | |
169 | return 0; | |
170 | ||
171 | u->transient = true; | |
f5869324 | 172 | u->perpetual = true; |
8e4e851f LP |
173 | |
174 | /* init.scope is a bit special, as it has to stick around forever. Because of its special semantics we | |
175 | * synthesize it here, instead of relying on the unit file on disk. */ | |
176 | ||
177 | u->default_dependencies = false; | |
8e4e851f LP |
178 | |
179 | /* Prettify things, if we can. */ | |
180 | if (!u->description) | |
181 | u->description = strdup("System and Service Manager"); | |
182 | if (!u->documentation) | |
183 | (void) strv_extend(&u->documentation, "man:systemd(1)"); | |
184 | ||
185 | return 1; | |
186 | } | |
187 | ||
75193d41 ZJS |
188 | static int scope_add_extras(Scope *s) { |
189 | int r; | |
190 | ||
191 | r = unit_patch_contexts(UNIT(s)); | |
192 | if (r < 0) | |
193 | return r; | |
194 | ||
195 | r = unit_set_default_slice(UNIT(s)); | |
196 | if (r < 0) | |
197 | return r; | |
198 | ||
5fa09835 ML |
199 | if (s->oom_policy < 0) |
200 | s->oom_policy = s->cgroup_context.delegate ? OOM_CONTINUE : UNIT(s)->manager->default_oom_policy; | |
201 | ||
202 | s->cgroup_context.memory_oom_group = s->oom_policy == OOM_KILL; | |
203 | ||
75193d41 ZJS |
204 | return scope_add_default_dependencies(s); |
205 | } | |
206 | ||
6c12b52e LP |
207 | static int scope_load(Unit *u) { |
208 | Scope *s = SCOPE(u); | |
209 | int r; | |
210 | ||
211 | assert(s); | |
212 | assert(u->load_state == UNIT_STUB); | |
213 | ||
2c289ea8 | 214 | if (!u->transient && !MANAGER_IS_RELOADING(u->manager)) |
4f4afc88 | 215 | /* Refuse to load non-transient scope units, but allow them while reloading. */ |
6c12b52e LP |
216 | return -ENOENT; |
217 | ||
8e4e851f LP |
218 | r = scope_load_init_scope(u); |
219 | if (r < 0) | |
220 | return r; | |
c3620770 ZJS |
221 | |
222 | r = unit_load_fragment_and_dropin(u, false); | |
6c12b52e LP |
223 | if (r < 0) |
224 | return r; | |
225 | ||
75193d41 ZJS |
226 | if (u->load_state != UNIT_LOADED) |
227 | return 0; | |
6c12b52e | 228 | |
75193d41 ZJS |
229 | r = scope_add_extras(s); |
230 | if (r < 0) | |
231 | return r; | |
6c12b52e LP |
232 | |
233 | return scope_verify(s); | |
234 | } | |
235 | ||
7508f7f2 PW |
236 | static usec_t scope_coldplug_timeout(Scope *s) { |
237 | assert(s); | |
238 | ||
239 | switch (s->deserialized_state) { | |
240 | ||
9ed7de60 | 241 | case SCOPE_RUNNING: |
5918a933 | 242 | return scope_running_timeout(s); |
9ed7de60 | 243 | |
7508f7f2 PW |
244 | case SCOPE_STOP_SIGKILL: |
245 | case SCOPE_STOP_SIGTERM: | |
246 | return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_stop_usec); | |
247 | ||
248 | default: | |
249 | return USEC_INFINITY; | |
250 | } | |
251 | } | |
252 | ||
be847e82 | 253 | static int scope_coldplug(Unit *u) { |
6c12b52e LP |
254 | Scope *s = SCOPE(u); |
255 | int r; | |
256 | ||
257 | assert(s); | |
258 | assert(s->state == SCOPE_DEAD); | |
259 | ||
36c16a7c LP |
260 | if (s->deserialized_state == s->state) |
261 | return 0; | |
a911bb9a | 262 | |
7508f7f2 PW |
263 | r = scope_arm_timer(s, scope_coldplug_timeout(s)); |
264 | if (r < 0) | |
265 | return r; | |
6c12b52e | 266 | |
428a9f6f FB |
267 | if (!IN_SET(s->deserialized_state, SCOPE_DEAD, SCOPE_FAILED)) { |
268 | if (u->pids) { | |
269 | void *pidp; | |
270 | ||
271 | SET_FOREACH(pidp, u->pids) { | |
272 | r = unit_watch_pid(u, PTR_TO_PID(pidp), false); | |
273 | if (r < 0 && r != -EEXIST) | |
274 | return r; | |
275 | } | |
276 | } else | |
277 | (void) unit_enqueue_rewatch_pids(u); | |
278 | } | |
36c16a7c | 279 | |
371c0b79 LP |
280 | bus_scope_track_controller(s); |
281 | ||
36c16a7c | 282 | scope_set_state(s, s->deserialized_state); |
6c12b52e LP |
283 | return 0; |
284 | } | |
285 | ||
286 | static void scope_dump(Unit *u, FILE *f, const char *prefix) { | |
287 | Scope *s = SCOPE(u); | |
288 | ||
289 | assert(s); | |
290 | assert(f); | |
291 | ||
292 | fprintf(f, | |
293 | "%sScope State: %s\n" | |
9ed7de60 | 294 | "%sResult: %s\n" |
5918a933 | 295 | "%sRuntimeMaxSec: %s\n" |
5fa09835 ML |
296 | "%sRuntimeRandomizedExtraSec: %s\n" |
297 | "%sOOMPolicy: %s\n", | |
6c12b52e | 298 | prefix, scope_state_to_string(s->state), |
9ed7de60 | 299 | prefix, scope_result_to_string(s->result), |
5918a933 | 300 | prefix, FORMAT_TIMESPAN(s->runtime_max_usec, USEC_PER_SEC), |
5fa09835 ML |
301 | prefix, FORMAT_TIMESPAN(s->runtime_rand_extra_usec, USEC_PER_SEC), |
302 | prefix, oom_policy_to_string(s->oom_policy)); | |
6c12b52e | 303 | |
bc0623df | 304 | cgroup_context_dump(UNIT(s), f, prefix); |
6c12b52e LP |
305 | kill_context_dump(&s->kill_context, f, prefix); |
306 | } | |
307 | ||
308 | static void scope_enter_dead(Scope *s, ScopeResult f) { | |
309 | assert(s); | |
310 | ||
a0fef983 | 311 | if (s->result == SCOPE_SUCCESS) |
6c12b52e LP |
312 | s->result = f; |
313 | ||
aac99f30 | 314 | unit_log_result(UNIT(s), s->result == SCOPE_SUCCESS, scope_result_to_string(s->result)); |
6c12b52e LP |
315 | scope_set_state(s, s->result != SCOPE_SUCCESS ? SCOPE_FAILED : SCOPE_DEAD); |
316 | } | |
317 | ||
318 | static void scope_enter_signal(Scope *s, ScopeState state, ScopeResult f) { | |
2d4a39e7 | 319 | bool skip_signal = false; |
6c12b52e LP |
320 | int r; |
321 | ||
322 | assert(s); | |
323 | ||
a0fef983 | 324 | if (s->result == SCOPE_SUCCESS) |
6c12b52e LP |
325 | s->result = f; |
326 | ||
50be4f4a LP |
327 | /* Before sending any signal, make sure we track all members of this cgroup */ |
328 | (void) unit_watch_all_pids(UNIT(s)); | |
329 | ||
330 | /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have | |
331 | * died now */ | |
332 | (void) unit_enqueue_rewatch_pids(UNIT(s)); | |
a911bb9a | 333 | |
371c0b79 LP |
334 | /* If we have a controller set let's ask the controller nicely to terminate the scope, instead of us going |
335 | * directly into SIGTERM berserk mode */ | |
2d4a39e7 LP |
336 | if (state == SCOPE_STOP_SIGTERM) |
337 | skip_signal = bus_scope_send_request_stop(s) > 0; | |
338 | ||
59ec09a8 ZJS |
339 | if (skip_signal) |
340 | r = 1; /* wait */ | |
341 | else { | |
2d4a39e7 LP |
342 | r = unit_kill_context( |
343 | UNIT(s), | |
344 | &s->kill_context, | |
3862e809 LP |
345 | state != SCOPE_STOP_SIGTERM ? KILL_KILL : |
346 | s->was_abandoned ? KILL_TERMINATE_AND_LOG : | |
347 | KILL_TERMINATE, | |
2d4a39e7 LP |
348 | -1, -1, false); |
349 | if (r < 0) | |
350 | goto fail; | |
59ec09a8 | 351 | } |
6c12b52e LP |
352 | |
353 | if (r > 0) { | |
36c16a7c | 354 | r = scope_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec)); |
718db961 LP |
355 | if (r < 0) |
356 | goto fail; | |
6c12b52e LP |
357 | |
358 | scope_set_state(s, state); | |
ac84d1fb LP |
359 | } else if (state == SCOPE_STOP_SIGTERM) |
360 | scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_SUCCESS); | |
361 | else | |
6c12b52e LP |
362 | scope_enter_dead(s, SCOPE_SUCCESS); |
363 | ||
364 | return; | |
365 | ||
366 | fail: | |
f2341e0a | 367 | log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m"); |
6c12b52e LP |
368 | |
369 | scope_enter_dead(s, SCOPE_FAILURE_RESOURCES); | |
370 | } | |
371 | ||
03860190 MS |
372 | static int scope_enter_start_chown(Scope *s) { |
373 | Unit *u = UNIT(s); | |
374 | pid_t pid; | |
6c12b52e LP |
375 | int r; |
376 | ||
377 | assert(s); | |
03860190 | 378 | assert(s->user); |
6c12b52e | 379 | |
03860190 MS |
380 | r = scope_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), u->manager->default_timeout_start_usec)); |
381 | if (r < 0) | |
382 | return r; | |
efdb0237 | 383 | |
03860190 MS |
384 | r = unit_fork_helper_process(u, "(sd-chown-cgroup)", &pid); |
385 | if (r < 0) | |
386 | goto fail; | |
7b617155 | 387 | |
03860190 MS |
388 | if (r == 0) { |
389 | uid_t uid = UID_INVALID; | |
390 | gid_t gid = GID_INVALID; | |
6c12b52e | 391 | |
03860190 MS |
392 | if (!isempty(s->user)) { |
393 | const char *user = s->user; | |
6c12b52e | 394 | |
03860190 MS |
395 | r = get_user_creds(&user, &uid, &gid, NULL, NULL, 0); |
396 | if (r < 0) { | |
397 | log_unit_error_errno(UNIT(s), r, "Failed to resolve user \"%s\": %m", user); | |
398 | _exit(EXIT_USER); | |
399 | } | |
400 | } | |
401 | ||
402 | if (!isempty(s->group)) { | |
403 | const char *group = s->group; | |
404 | ||
405 | r = get_group_creds(&group, &gid, 0); | |
406 | if (r < 0) { | |
407 | log_unit_error_errno(UNIT(s), r, "Failed to resolve group \"%s\": %m", group); | |
408 | _exit(EXIT_GROUP); | |
409 | } | |
410 | } | |
411 | ||
412 | r = cg_set_access(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, uid, gid); | |
413 | if (r < 0) { | |
414 | log_unit_error_errno(UNIT(s), r, "Failed to adjust control group access: %m"); | |
415 | _exit(EXIT_CGROUP); | |
416 | } | |
417 | ||
418 | _exit(EXIT_SUCCESS); | |
419 | } | |
420 | ||
421 | r = unit_watch_pid(UNIT(s), pid, true); | |
422 | if (r < 0) | |
423 | goto fail; | |
424 | ||
425 | scope_set_state(s, SCOPE_START_CHOWN); | |
426 | ||
427 | return 1; | |
428 | fail: | |
429 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); | |
430 | return r; | |
431 | } | |
432 | ||
433 | static int scope_enter_running(Scope *s) { | |
434 | Unit *u = UNIT(s); | |
435 | int r; | |
436 | ||
437 | assert(s); | |
6c12b52e | 438 | |
371c0b79 LP |
439 | (void) bus_scope_track_controller(s); |
440 | ||
4b58153d LP |
441 | r = unit_acquire_invocation_id(u); |
442 | if (r < 0) | |
443 | return r; | |
444 | ||
01542056 | 445 | unit_export_state_files(u); |
d3070fbd | 446 | |
01542056 | 447 | r = unit_attach_pids_to_cgroup(u, u->pids, NULL); |
dd305ec9 | 448 | if (r < 0) { |
01542056 | 449 | log_unit_warning_errno(u, r, "Failed to add PIDs to scope's control group: %m"); |
68a01fb6 | 450 | scope_enter_dead(s, SCOPE_FAILURE_RESOURCES); |
6c12b52e | 451 | return r; |
dd305ec9 | 452 | } |
8d3e4ac7 | 453 | if (r == 0) { |
e99b9285 | 454 | log_unit_warning(u, "No PIDs left to attach to the scope's control group, refusing."); |
8d3e4ac7 LP |
455 | scope_enter_dead(s, SCOPE_FAILURE_RESOURCES); |
456 | return -ECHILD; | |
457 | } | |
458 | log_unit_debug(u, "%i %s added to scope's control group.", r, r == 1 ? "process" : "processes"); | |
6c12b52e | 459 | |
6c12b52e LP |
460 | s->result = SCOPE_SUCCESS; |
461 | ||
462 | scope_set_state(s, SCOPE_RUNNING); | |
b91ada2a | 463 | |
9ed7de60 | 464 | /* Set the maximum runtime timeout. */ |
5918a933 | 465 | scope_arm_timer(s, scope_running_timeout(s)); |
9ed7de60 | 466 | |
e9eec8b5 FB |
467 | /* On unified we use proper notifications hence we can unwatch the PIDs |
468 | * we just attached to the scope. This can also be done on legacy as | |
469 | * we're going to update the list of the processes we watch with the | |
470 | * PIDs currently in the scope anyway. */ | |
471 | unit_unwatch_all_pids(u); | |
472 | ||
473 | /* Start watching the PIDs currently in the scope (legacy hierarchy only) */ | |
01542056 | 474 | (void) unit_enqueue_rewatch_pids(u); |
82a2b6bb | 475 | return 1; |
6c12b52e LP |
476 | } |
477 | ||
03860190 MS |
478 | static int scope_start(Unit *u) { |
479 | Scope *s = SCOPE(u); | |
480 | ||
481 | assert(s); | |
482 | ||
483 | if (unit_has_name(u, SPECIAL_INIT_SCOPE)) | |
484 | return -EPERM; | |
485 | ||
486 | if (s->state == SCOPE_FAILED) | |
487 | return -EPERM; | |
488 | ||
489 | /* We can't fulfill this right now, please try again later */ | |
490 | if (IN_SET(s->state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL)) | |
491 | return -EAGAIN; | |
492 | ||
493 | assert(s->state == SCOPE_DEAD); | |
494 | ||
495 | if (!u->transient && !MANAGER_IS_RELOADING(u->manager)) | |
496 | return -ENOENT; | |
497 | ||
498 | (void) unit_realize_cgroup(u); | |
499 | (void) unit_reset_accounting(u); | |
500 | ||
501 | /* We check only for User= option to keep behavior consistent with logic for service units, | |
5c19169f | 502 | * i.e. having 'Delegate=true Group=foo' w/o specifying User= has no effect. */ |
03860190 MS |
503 | if (s->user && unit_cgroup_delegate(u)) |
504 | return scope_enter_start_chown(s); | |
505 | ||
506 | return scope_enter_running(s); | |
507 | } | |
508 | ||
6c12b52e LP |
509 | static int scope_stop(Unit *u) { |
510 | Scope *s = SCOPE(u); | |
511 | ||
512 | assert(s); | |
6c12b52e | 513 | |
3742095b | 514 | if (IN_SET(s->state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL)) |
6c12b52e LP |
515 | return 0; |
516 | ||
3742095b | 517 | assert(IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED)); |
6c12b52e LP |
518 | |
519 | scope_enter_signal(s, SCOPE_STOP_SIGTERM, SCOPE_SUCCESS); | |
82a2b6bb | 520 | return 1; |
6c12b52e LP |
521 | } |
522 | ||
8bcca7e2 LP |
523 | static void scope_reset_failed(Unit *u) { |
524 | Scope *s = SCOPE(u); | |
525 | ||
526 | assert(s); | |
527 | ||
528 | if (s->state == SCOPE_FAILED) | |
529 | scope_set_state(s, SCOPE_DEAD); | |
530 | ||
531 | s->result = SCOPE_SUCCESS; | |
532 | } | |
533 | ||
a721cd00 LP |
534 | static int scope_kill(Unit *u, KillWho who, int signo, int code, int value, sd_bus_error *error) { |
535 | return unit_kill_common(u, who, signo, code, value, -1, -1, error); | |
6c12b52e LP |
536 | } |
537 | ||
7a7821c8 | 538 | static int scope_get_timeout(Unit *u, usec_t *timeout) { |
68db7a3b | 539 | Scope *s = SCOPE(u); |
7a7821c8 | 540 | usec_t t; |
68db7a3b ZJS |
541 | int r; |
542 | ||
543 | if (!s->timer_event_source) | |
544 | return 0; | |
545 | ||
7a7821c8 | 546 | r = sd_event_source_get_time(s->timer_event_source, &t); |
68db7a3b ZJS |
547 | if (r < 0) |
548 | return r; | |
7a7821c8 LP |
549 | if (t == USEC_INFINITY) |
550 | return 0; | |
68db7a3b | 551 | |
7a7821c8 | 552 | *timeout = t; |
68db7a3b ZJS |
553 | return 1; |
554 | } | |
555 | ||
6c12b52e LP |
556 | static int scope_serialize(Unit *u, FILE *f, FDSet *fds) { |
557 | Scope *s = SCOPE(u); | |
428a9f6f | 558 | void *pidp; |
6c12b52e LP |
559 | |
560 | assert(s); | |
561 | assert(f); | |
562 | assert(fds); | |
563 | ||
d68c645b LP |
564 | (void) serialize_item(f, "state", scope_state_to_string(s->state)); |
565 | (void) serialize_bool(f, "was-abandoned", s->was_abandoned); | |
33fe0afe LP |
566 | |
567 | if (s->controller) | |
d68c645b | 568 | (void) serialize_item(f, "controller", s->controller); |
33fe0afe | 569 | |
428a9f6f FB |
570 | SET_FOREACH(pidp, u->pids) |
571 | serialize_item_format(f, "pids", PID_FMT, PTR_TO_PID(pidp)); | |
572 | ||
6c12b52e LP |
573 | return 0; |
574 | } | |
575 | ||
576 | static int scope_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
577 | Scope *s = SCOPE(u); | |
33fe0afe | 578 | int r; |
6c12b52e LP |
579 | |
580 | assert(u); | |
581 | assert(key); | |
582 | assert(value); | |
583 | assert(fds); | |
584 | ||
585 | if (streq(key, "state")) { | |
586 | ScopeState state; | |
587 | ||
588 | state = scope_state_from_string(value); | |
589 | if (state < 0) | |
f2341e0a | 590 | log_unit_debug(u, "Failed to parse state value: %s", value); |
6c12b52e LP |
591 | else |
592 | s->deserialized_state = state; | |
593 | ||
3862e809 LP |
594 | } else if (streq(key, "was-abandoned")) { |
595 | int k; | |
596 | ||
597 | k = parse_boolean(value); | |
598 | if (k < 0) | |
599 | log_unit_debug(u, "Failed to parse boolean value: %s", value); | |
600 | else | |
601 | s->was_abandoned = k; | |
33fe0afe LP |
602 | } else if (streq(key, "controller")) { |
603 | ||
604 | r = free_and_strdup(&s->controller, value); | |
605 | if (r < 0) | |
d68c645b | 606 | return log_oom(); |
33fe0afe | 607 | |
428a9f6f FB |
608 | } else if (streq(key, "pids")) { |
609 | pid_t pid; | |
610 | ||
611 | if (parse_pid(value, &pid) < 0) | |
612 | log_unit_debug(u, "Failed to parse pids value: %s", value); | |
613 | else { | |
614f57ed | 614 | r = set_ensure_put(&u->pids, NULL, PID_TO_PTR(pid)); |
428a9f6f FB |
615 | if (r < 0) |
616 | return r; | |
617 | } | |
6c12b52e | 618 | } else |
f2341e0a | 619 | log_unit_debug(u, "Unknown serialization key: %s", key); |
6c12b52e LP |
620 | |
621 | return 0; | |
622 | } | |
623 | ||
a911bb9a LP |
624 | static void scope_notify_cgroup_empty_event(Unit *u) { |
625 | Scope *s = SCOPE(u); | |
626 | assert(u); | |
627 | ||
f2341e0a | 628 | log_unit_debug(u, "cgroup is empty"); |
a911bb9a LP |
629 | |
630 | if (IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL)) | |
631 | scope_enter_dead(s, SCOPE_SUCCESS); | |
e08dabfe AZ |
632 | |
633 | /* If the cgroup empty notification comes when the unit is not active, we must have failed to clean | |
634 | * up the cgroup earlier and should do it now. */ | |
635 | if (IN_SET(s->state, SCOPE_DEAD, SCOPE_FAILED)) | |
636 | unit_prune_cgroup(u); | |
a911bb9a LP |
637 | } |
638 | ||
7238fd51 | 639 | static void scope_notify_cgroup_oom_event(Unit *u, bool managed_oom) { |
640 | Scope *s = SCOPE(u); | |
641 | ||
642 | if (managed_oom) | |
643 | log_unit_debug(u, "Process(es) of control group were killed by systemd-oomd."); | |
644 | else | |
645 | log_unit_debug(u, "Process of control group was killed by the OOM killer."); | |
646 | ||
5fa09835 ML |
647 | if (s->oom_policy == OOM_CONTINUE) |
648 | return; | |
649 | ||
7238fd51 | 650 | switch (s->state) { |
651 | ||
652 | case SCOPE_START_CHOWN: | |
653 | case SCOPE_RUNNING: | |
5fa09835 ML |
654 | scope_enter_signal(s, SCOPE_STOP_SIGTERM, SCOPE_FAILURE_OOM_KILL); |
655 | break; | |
656 | ||
7238fd51 | 657 | case SCOPE_STOP_SIGTERM: |
658 | scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_FAILURE_OOM_KILL); | |
659 | break; | |
660 | ||
661 | case SCOPE_STOP_SIGKILL: | |
662 | if (s->result == SCOPE_SUCCESS) | |
663 | s->result = SCOPE_FAILURE_OOM_KILL; | |
664 | break; | |
665 | /* SCOPE_DEAD, SCOPE_ABANDONED, and SCOPE_FAILED end up in default */ | |
666 | default: | |
667 | ; | |
668 | } | |
669 | } | |
670 | ||
a911bb9a | 671 | static void scope_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
03860190 MS |
672 | Scope *s = SCOPE(u); |
673 | ||
674 | assert(s); | |
675 | ||
676 | if (s->state == SCOPE_START_CHOWN) { | |
677 | if (!is_clean_exit(code, status, EXIT_CLEAN_COMMAND, NULL)) | |
678 | scope_enter_dead(s, SCOPE_FAILURE_RESOURCES); | |
679 | else | |
680 | scope_enter_running(s); | |
681 | return; | |
682 | } | |
a911bb9a | 683 | |
11aef522 LP |
684 | /* If we get a SIGCHLD event for one of the processes we were interested in, then we look for others to |
685 | * watch, under the assumption that we'll sooner or later get a SIGCHLD for them, as the original | |
686 | * process we watched was probably the parent of them, and they are hence now our children. */ | |
a911bb9a | 687 | |
50be4f4a | 688 | (void) unit_enqueue_rewatch_pids(u); |
a911bb9a LP |
689 | } |
690 | ||
718db961 LP |
691 | static int scope_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
692 | Scope *s = SCOPE(userdata); | |
6c12b52e LP |
693 | |
694 | assert(s); | |
718db961 | 695 | assert(s->timer_event_source == source); |
6c12b52e LP |
696 | |
697 | switch (s->state) { | |
698 | ||
9ed7de60 PW |
699 | case SCOPE_RUNNING: |
700 | log_unit_warning(UNIT(s), "Scope reached runtime time limit. Stopping."); | |
701 | scope_enter_signal(s, SCOPE_STOP_SIGTERM, SCOPE_FAILURE_TIMEOUT); | |
702 | break; | |
703 | ||
6c12b52e LP |
704 | case SCOPE_STOP_SIGTERM: |
705 | if (s->kill_context.send_sigkill) { | |
f2341e0a | 706 | log_unit_warning(UNIT(s), "Stopping timed out. Killing."); |
6c12b52e LP |
707 | scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_FAILURE_TIMEOUT); |
708 | } else { | |
f2341e0a | 709 | log_unit_warning(UNIT(s), "Stopping timed out. Skipping SIGKILL."); |
6c12b52e LP |
710 | scope_enter_dead(s, SCOPE_FAILURE_TIMEOUT); |
711 | } | |
712 | ||
713 | break; | |
714 | ||
715 | case SCOPE_STOP_SIGKILL: | |
f2341e0a | 716 | log_unit_warning(UNIT(s), "Still around after SIGKILL. Ignoring."); |
6c12b52e LP |
717 | scope_enter_dead(s, SCOPE_FAILURE_TIMEOUT); |
718 | break; | |
719 | ||
03860190 MS |
720 | case SCOPE_START_CHOWN: |
721 | log_unit_warning(UNIT(s), "User lookup timed out. Entering failed state."); | |
722 | scope_enter_dead(s, SCOPE_FAILURE_TIMEOUT); | |
723 | break; | |
724 | ||
6c12b52e | 725 | default: |
04499a70 | 726 | assert_not_reached(); |
6c12b52e | 727 | } |
718db961 LP |
728 | |
729 | return 0; | |
6c12b52e LP |
730 | } |
731 | ||
a911bb9a LP |
732 | int scope_abandon(Scope *s) { |
733 | assert(s); | |
6c12b52e | 734 | |
efdb0237 LP |
735 | if (unit_has_name(UNIT(s), SPECIAL_INIT_SCOPE)) |
736 | return -EPERM; | |
737 | ||
a911bb9a LP |
738 | if (!IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED)) |
739 | return -ESTALE; | |
6c12b52e | 740 | |
3862e809 | 741 | s->was_abandoned = true; |
371c0b79 | 742 | |
a1e58e8e | 743 | s->controller = mfree(s->controller); |
371c0b79 LP |
744 | s->controller_track = sd_bus_track_unref(s->controller_track); |
745 | ||
8cb83266 | 746 | scope_set_state(s, SCOPE_ABANDONED); |
6c12b52e | 747 | |
50be4f4a LP |
748 | /* The client is no longer watching the remaining processes, so let's step in here, under the assumption that |
749 | * the remaining processes will be sooner or later reassigned to us as parent. */ | |
750 | (void) unit_enqueue_rewatch_pids(UNIT(s)); | |
6c12b52e | 751 | |
a911bb9a | 752 | return 0; |
6c12b52e LP |
753 | } |
754 | ||
755 | _pure_ static UnitActiveState scope_active_state(Unit *u) { | |
756 | assert(u); | |
757 | ||
758 | return state_translation_table[SCOPE(u)->state]; | |
759 | } | |
760 | ||
761 | _pure_ static const char *scope_sub_state_to_string(Unit *u) { | |
762 | assert(u); | |
763 | ||
764 | return scope_state_to_string(SCOPE(u)->state); | |
765 | } | |
766 | ||
04eb582a | 767 | static void scope_enumerate_perpetual(Manager *m) { |
efdb0237 LP |
768 | Unit *u; |
769 | int r; | |
770 | ||
771 | assert(m); | |
772 | ||
773 | /* Let's unconditionally add the "init.scope" special unit | |
774 | * that encapsulates PID 1. Note that PID 1 already is in the | |
775 | * cgroup for this, we hence just need to allocate the object | |
776 | * for it and that's it. */ | |
777 | ||
778 | u = manager_get_unit(m, SPECIAL_INIT_SCOPE); | |
779 | if (!u) { | |
a581e45a | 780 | r = unit_new_for_name(m, sizeof(Scope), SPECIAL_INIT_SCOPE, &u); |
efdb0237 | 781 | if (r < 0) { |
a581e45a | 782 | log_error_errno(r, "Failed to allocate the special " SPECIAL_INIT_SCOPE " unit: %m"); |
ba64af90 | 783 | return; |
efdb0237 LP |
784 | } |
785 | } | |
786 | ||
787 | u->transient = true; | |
f5869324 | 788 | u->perpetual = true; |
efdb0237 | 789 | SCOPE(u)->deserialized_state = SCOPE_RUNNING; |
efdb0237 LP |
790 | |
791 | unit_add_to_load_queue(u); | |
792 | unit_add_to_dbus_queue(u); | |
020b2e41 LB |
793 | /* Enqueue an explicit cgroup realization here. Unlike other cgroups this one already exists and is |
794 | * populated (by us, after all!) already, even when we are not in a reload cycle. Hence we cannot | |
795 | * apply the settings at creation time anymore, but let's at least apply them asynchronously. */ | |
796 | unit_add_to_cgroup_realize_queue(u); | |
efdb0237 LP |
797 | } |
798 | ||
6c12b52e | 799 | static const char* const scope_result_table[_SCOPE_RESULT_MAX] = { |
48d83e33 | 800 | [SCOPE_SUCCESS] = "success", |
6c12b52e | 801 | [SCOPE_FAILURE_RESOURCES] = "resources", |
48d83e33 | 802 | [SCOPE_FAILURE_TIMEOUT] = "timeout", |
7238fd51 | 803 | [SCOPE_FAILURE_OOM_KILL] = "oom-kill", |
6c12b52e LP |
804 | }; |
805 | ||
806 | DEFINE_STRING_TABLE_LOOKUP(scope_result, ScopeResult); | |
807 | ||
808 | const UnitVTable scope_vtable = { | |
809 | .object_size = sizeof(Scope), | |
718db961 LP |
810 | .cgroup_context_offset = offsetof(Scope, cgroup_context), |
811 | .kill_context_offset = offsetof(Scope, kill_context), | |
812 | ||
6c12b52e LP |
813 | .sections = |
814 | "Unit\0" | |
815 | "Scope\0" | |
816 | "Install\0", | |
6c12b52e | 817 | .private_section = "Scope", |
6c12b52e | 818 | |
700e2d63 | 819 | .can_transient = true, |
1d9cc876 | 820 | .can_delegate = true, |
c80a9a33 | 821 | .can_fail = true, |
d4fd1cf2 | 822 | .once_only = true, |
4d824a4e | 823 | .can_set_managed_oom = true, |
6c12b52e LP |
824 | |
825 | .init = scope_init, | |
826 | .load = scope_load, | |
827 | .done = scope_done, | |
828 | ||
829 | .coldplug = scope_coldplug, | |
830 | ||
831 | .dump = scope_dump, | |
832 | ||
833 | .start = scope_start, | |
834 | .stop = scope_stop, | |
835 | ||
836 | .kill = scope_kill, | |
837 | ||
d9e45bc3 MS |
838 | .freeze = unit_freeze_vtable_common, |
839 | .thaw = unit_thaw_vtable_common, | |
840 | ||
68db7a3b ZJS |
841 | .get_timeout = scope_get_timeout, |
842 | ||
6c12b52e LP |
843 | .serialize = scope_serialize, |
844 | .deserialize_item = scope_deserialize_item, | |
845 | ||
846 | .active_state = scope_active_state, | |
847 | .sub_state_to_string = scope_sub_state_to_string, | |
848 | ||
a911bb9a LP |
849 | .sigchld_event = scope_sigchld_event, |
850 | ||
8bcca7e2 LP |
851 | .reset_failed = scope_reset_failed, |
852 | ||
6c12b52e | 853 | .notify_cgroup_empty = scope_notify_cgroup_empty_event, |
7238fd51 | 854 | .notify_cgroup_oom = scope_notify_cgroup_oom_event, |
6c12b52e | 855 | |
6c12b52e LP |
856 | .bus_set_property = bus_scope_set_property, |
857 | .bus_commit_properties = bus_scope_commit_properties, | |
858 | ||
04eb582a | 859 | .enumerate_perpetual = scope_enumerate_perpetual, |
6c12b52e | 860 | }; |