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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" |
07630cea | 7 | #include "dbus-scope.h" |
6fcbec6f | 8 | #include "dbus-unit.h" |
07630cea | 9 | #include "load-dropin.h" |
6c12b52e | 10 | #include "log.h" |
428a9f6f | 11 | #include "process-util.h" |
5918a933 | 12 | #include "random-util.h" |
b5efdb8a | 13 | #include "scope.h" |
d68c645b | 14 | #include "serialize.h" |
6c12b52e | 15 | #include "special.h" |
8b43440b | 16 | #include "string-table.h" |
07630cea LP |
17 | #include "string-util.h" |
18 | #include "strv.h" | |
6c12b52e | 19 | #include "unit-name.h" |
efdb0237 | 20 | #include "unit.h" |
6c12b52e LP |
21 | |
22 | static const UnitActiveState state_translation_table[_SCOPE_STATE_MAX] = { | |
23 | [SCOPE_DEAD] = UNIT_INACTIVE, | |
24 | [SCOPE_RUNNING] = UNIT_ACTIVE, | |
a911bb9a | 25 | [SCOPE_ABANDONED] = UNIT_ACTIVE, |
6c12b52e LP |
26 | [SCOPE_STOP_SIGTERM] = UNIT_DEACTIVATING, |
27 | [SCOPE_STOP_SIGKILL] = UNIT_DEACTIVATING, | |
28 | [SCOPE_FAILED] = UNIT_FAILED | |
29 | }; | |
30 | ||
718db961 LP |
31 | static int scope_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); |
32 | ||
6c12b52e LP |
33 | static void scope_init(Unit *u) { |
34 | Scope *s = SCOPE(u); | |
35 | ||
36 | assert(u); | |
37 | assert(u->load_state == UNIT_STUB); | |
38 | ||
9ed7de60 | 39 | s->runtime_max_usec = USEC_INFINITY; |
1f19a534 | 40 | s->timeout_stop_usec = u->manager->default_timeout_stop_usec; |
1b4cd0cf | 41 | u->ignore_on_isolate = true; |
6c12b52e LP |
42 | } |
43 | ||
44 | static void scope_done(Unit *u) { | |
45 | Scope *s = SCOPE(u); | |
46 | ||
47 | assert(u); | |
48 | ||
371c0b79 LP |
49 | s->controller = mfree(s->controller); |
50 | s->controller_track = sd_bus_track_unref(s->controller_track); | |
2d4a39e7 | 51 | |
5dcadb4c | 52 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); |
718db961 LP |
53 | } |
54 | ||
ecea250d | 55 | static usec_t scope_running_timeout(Scope *s) { |
5918a933 AB |
56 | usec_t delta = 0; |
57 | ||
58 | assert(s); | |
59 | ||
60 | if (s->runtime_rand_extra_usec != 0) { | |
61 | delta = random_u64_range(s->runtime_rand_extra_usec); | |
62 | log_unit_debug(UNIT(s), "Adding delta of %s sec to timeout", FORMAT_TIMESPAN(delta, USEC_PER_SEC)); | |
63 | } | |
64 | ||
65 | return usec_add(usec_add(UNIT(s)->active_enter_timestamp.monotonic, | |
66 | s->runtime_max_usec), | |
67 | delta); | |
68 | } | |
69 | ||
36c16a7c | 70 | static int scope_arm_timer(Scope *s, usec_t usec) { |
718db961 LP |
71 | int r; |
72 | ||
73 | assert(s); | |
74 | ||
718db961 | 75 | if (s->timer_event_source) { |
36c16a7c | 76 | r = sd_event_source_set_time(s->timer_event_source, usec); |
718db961 LP |
77 | if (r < 0) |
78 | return r; | |
79 | ||
80 | return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT); | |
81 | } | |
82 | ||
36c16a7c LP |
83 | if (usec == USEC_INFINITY) |
84 | return 0; | |
85 | ||
cbf60d0a | 86 | r = sd_event_add_time( |
6a0f1f6d LP |
87 | UNIT(s)->manager->event, |
88 | &s->timer_event_source, | |
89 | CLOCK_MONOTONIC, | |
36c16a7c | 90 | usec, 0, |
6a0f1f6d | 91 | scope_dispatch_timer, s); |
7dfbe2e3 TG |
92 | if (r < 0) |
93 | return r; | |
94 | ||
95 | (void) sd_event_source_set_description(s->timer_event_source, "scope-timer"); | |
96 | ||
97 | return 0; | |
6c12b52e LP |
98 | } |
99 | ||
100 | static void scope_set_state(Scope *s, ScopeState state) { | |
101 | ScopeState old_state; | |
102 | assert(s); | |
103 | ||
6fcbec6f LP |
104 | if (s->state != state) |
105 | bus_unit_send_pending_change_signal(UNIT(s), false); | |
106 | ||
6c12b52e LP |
107 | old_state = s->state; |
108 | s->state = state; | |
109 | ||
a911bb9a | 110 | if (!IN_SET(state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL)) |
5dcadb4c | 111 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); |
6c12b52e | 112 | |
50be4f4a | 113 | if (IN_SET(state, SCOPE_DEAD, SCOPE_FAILED)) { |
a911bb9a | 114 | unit_unwatch_all_pids(UNIT(s)); |
50be4f4a LP |
115 | unit_dequeue_rewatch_pids(UNIT(s)); |
116 | } | |
a911bb9a | 117 | |
6c12b52e | 118 | if (state != old_state) |
a911bb9a | 119 | log_debug("%s changed %s -> %s", UNIT(s)->id, scope_state_to_string(old_state), scope_state_to_string(state)); |
6c12b52e | 120 | |
2ad2e41a | 121 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], 0); |
6c12b52e LP |
122 | } |
123 | ||
124 | static int scope_add_default_dependencies(Scope *s) { | |
125 | int r; | |
126 | ||
127 | assert(s); | |
128 | ||
4c9ea260 LP |
129 | if (!UNIT(s)->default_dependencies) |
130 | return 0; | |
131 | ||
6c12b52e LP |
132 | /* Make sure scopes are unloaded on shutdown */ |
133 | r = unit_add_two_dependencies_by_name( | |
134 | UNIT(s), | |
135 | UNIT_BEFORE, UNIT_CONFLICTS, | |
5a724170 | 136 | SPECIAL_SHUTDOWN_TARGET, true, |
eef85c4a | 137 | UNIT_DEPENDENCY_DEFAULT); |
6c12b52e LP |
138 | if (r < 0) |
139 | return r; | |
140 | ||
141 | return 0; | |
142 | } | |
143 | ||
144 | static int scope_verify(Scope *s) { | |
145 | assert(s); | |
75193d41 | 146 | assert(UNIT(s)->load_state == UNIT_LOADED); |
6c12b52e | 147 | |
efdb0237 | 148 | if (set_isempty(UNIT(s)->pids) && |
2c289ea8 | 149 | !MANAGER_IS_RELOADING(UNIT(s)->manager) && |
d85ff944 YW |
150 | !unit_has_name(UNIT(s), SPECIAL_INIT_SCOPE)) |
151 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOENT), "Scope has no PIDs. Refusing."); | |
6c12b52e LP |
152 | |
153 | return 0; | |
154 | } | |
155 | ||
8e4e851f LP |
156 | static int scope_load_init_scope(Unit *u) { |
157 | assert(u); | |
158 | ||
159 | if (!unit_has_name(u, SPECIAL_INIT_SCOPE)) | |
160 | return 0; | |
161 | ||
162 | u->transient = true; | |
f5869324 | 163 | u->perpetual = true; |
8e4e851f LP |
164 | |
165 | /* init.scope is a bit special, as it has to stick around forever. Because of its special semantics we | |
166 | * synthesize it here, instead of relying on the unit file on disk. */ | |
167 | ||
168 | u->default_dependencies = false; | |
8e4e851f LP |
169 | |
170 | /* Prettify things, if we can. */ | |
171 | if (!u->description) | |
172 | u->description = strdup("System and Service Manager"); | |
173 | if (!u->documentation) | |
174 | (void) strv_extend(&u->documentation, "man:systemd(1)"); | |
175 | ||
176 | return 1; | |
177 | } | |
178 | ||
75193d41 ZJS |
179 | static int scope_add_extras(Scope *s) { |
180 | int r; | |
181 | ||
182 | r = unit_patch_contexts(UNIT(s)); | |
183 | if (r < 0) | |
184 | return r; | |
185 | ||
186 | r = unit_set_default_slice(UNIT(s)); | |
187 | if (r < 0) | |
188 | return r; | |
189 | ||
190 | return scope_add_default_dependencies(s); | |
191 | } | |
192 | ||
6c12b52e LP |
193 | static int scope_load(Unit *u) { |
194 | Scope *s = SCOPE(u); | |
195 | int r; | |
196 | ||
197 | assert(s); | |
198 | assert(u->load_state == UNIT_STUB); | |
199 | ||
2c289ea8 | 200 | if (!u->transient && !MANAGER_IS_RELOADING(u->manager)) |
4f4afc88 | 201 | /* Refuse to load non-transient scope units, but allow them while reloading. */ |
6c12b52e LP |
202 | return -ENOENT; |
203 | ||
8e4e851f LP |
204 | r = scope_load_init_scope(u); |
205 | if (r < 0) | |
206 | return r; | |
c3620770 ZJS |
207 | |
208 | r = unit_load_fragment_and_dropin(u, false); | |
6c12b52e LP |
209 | if (r < 0) |
210 | return r; | |
211 | ||
75193d41 ZJS |
212 | if (u->load_state != UNIT_LOADED) |
213 | return 0; | |
6c12b52e | 214 | |
75193d41 ZJS |
215 | r = scope_add_extras(s); |
216 | if (r < 0) | |
217 | return r; | |
6c12b52e LP |
218 | |
219 | return scope_verify(s); | |
220 | } | |
221 | ||
7508f7f2 PW |
222 | static usec_t scope_coldplug_timeout(Scope *s) { |
223 | assert(s); | |
224 | ||
225 | switch (s->deserialized_state) { | |
226 | ||
9ed7de60 | 227 | case SCOPE_RUNNING: |
5918a933 | 228 | return scope_running_timeout(s); |
9ed7de60 | 229 | |
7508f7f2 PW |
230 | case SCOPE_STOP_SIGKILL: |
231 | case SCOPE_STOP_SIGTERM: | |
232 | return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_stop_usec); | |
233 | ||
234 | default: | |
235 | return USEC_INFINITY; | |
236 | } | |
237 | } | |
238 | ||
be847e82 | 239 | static int scope_coldplug(Unit *u) { |
6c12b52e LP |
240 | Scope *s = SCOPE(u); |
241 | int r; | |
242 | ||
243 | assert(s); | |
244 | assert(s->state == SCOPE_DEAD); | |
245 | ||
36c16a7c LP |
246 | if (s->deserialized_state == s->state) |
247 | return 0; | |
a911bb9a | 248 | |
7508f7f2 PW |
249 | r = scope_arm_timer(s, scope_coldplug_timeout(s)); |
250 | if (r < 0) | |
251 | return r; | |
6c12b52e | 252 | |
428a9f6f FB |
253 | if (!IN_SET(s->deserialized_state, SCOPE_DEAD, SCOPE_FAILED)) { |
254 | if (u->pids) { | |
255 | void *pidp; | |
256 | ||
257 | SET_FOREACH(pidp, u->pids) { | |
258 | r = unit_watch_pid(u, PTR_TO_PID(pidp), false); | |
259 | if (r < 0 && r != -EEXIST) | |
260 | return r; | |
261 | } | |
262 | } else | |
263 | (void) unit_enqueue_rewatch_pids(u); | |
264 | } | |
36c16a7c | 265 | |
371c0b79 LP |
266 | bus_scope_track_controller(s); |
267 | ||
36c16a7c | 268 | scope_set_state(s, s->deserialized_state); |
6c12b52e LP |
269 | return 0; |
270 | } | |
271 | ||
272 | static void scope_dump(Unit *u, FILE *f, const char *prefix) { | |
273 | Scope *s = SCOPE(u); | |
274 | ||
275 | assert(s); | |
276 | assert(f); | |
277 | ||
278 | fprintf(f, | |
279 | "%sScope State: %s\n" | |
9ed7de60 | 280 | "%sResult: %s\n" |
5918a933 AB |
281 | "%sRuntimeMaxSec: %s\n" |
282 | "%sRuntimeRandomizedExtraSec: %s\n", | |
6c12b52e | 283 | prefix, scope_state_to_string(s->state), |
9ed7de60 | 284 | prefix, scope_result_to_string(s->result), |
5918a933 AB |
285 | prefix, FORMAT_TIMESPAN(s->runtime_max_usec, USEC_PER_SEC), |
286 | prefix, FORMAT_TIMESPAN(s->runtime_rand_extra_usec, USEC_PER_SEC)); | |
6c12b52e | 287 | |
bc0623df | 288 | cgroup_context_dump(UNIT(s), f, prefix); |
6c12b52e LP |
289 | kill_context_dump(&s->kill_context, f, prefix); |
290 | } | |
291 | ||
292 | static void scope_enter_dead(Scope *s, ScopeResult f) { | |
293 | assert(s); | |
294 | ||
a0fef983 | 295 | if (s->result == SCOPE_SUCCESS) |
6c12b52e LP |
296 | s->result = f; |
297 | ||
aac99f30 | 298 | unit_log_result(UNIT(s), s->result == SCOPE_SUCCESS, scope_result_to_string(s->result)); |
6c12b52e LP |
299 | scope_set_state(s, s->result != SCOPE_SUCCESS ? SCOPE_FAILED : SCOPE_DEAD); |
300 | } | |
301 | ||
302 | static void scope_enter_signal(Scope *s, ScopeState state, ScopeResult f) { | |
2d4a39e7 | 303 | bool skip_signal = false; |
6c12b52e LP |
304 | int r; |
305 | ||
306 | assert(s); | |
307 | ||
a0fef983 | 308 | if (s->result == SCOPE_SUCCESS) |
6c12b52e LP |
309 | s->result = f; |
310 | ||
50be4f4a LP |
311 | /* Before sending any signal, make sure we track all members of this cgroup */ |
312 | (void) unit_watch_all_pids(UNIT(s)); | |
313 | ||
314 | /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have | |
315 | * died now */ | |
316 | (void) unit_enqueue_rewatch_pids(UNIT(s)); | |
a911bb9a | 317 | |
371c0b79 LP |
318 | /* If we have a controller set let's ask the controller nicely to terminate the scope, instead of us going |
319 | * directly into SIGTERM berserk mode */ | |
2d4a39e7 LP |
320 | if (state == SCOPE_STOP_SIGTERM) |
321 | skip_signal = bus_scope_send_request_stop(s) > 0; | |
322 | ||
59ec09a8 ZJS |
323 | if (skip_signal) |
324 | r = 1; /* wait */ | |
325 | else { | |
2d4a39e7 LP |
326 | r = unit_kill_context( |
327 | UNIT(s), | |
328 | &s->kill_context, | |
3862e809 LP |
329 | state != SCOPE_STOP_SIGTERM ? KILL_KILL : |
330 | s->was_abandoned ? KILL_TERMINATE_AND_LOG : | |
331 | KILL_TERMINATE, | |
2d4a39e7 LP |
332 | -1, -1, false); |
333 | if (r < 0) | |
334 | goto fail; | |
59ec09a8 | 335 | } |
6c12b52e LP |
336 | |
337 | if (r > 0) { | |
36c16a7c | 338 | r = scope_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec)); |
718db961 LP |
339 | if (r < 0) |
340 | goto fail; | |
6c12b52e LP |
341 | |
342 | scope_set_state(s, state); | |
ac84d1fb LP |
343 | } else if (state == SCOPE_STOP_SIGTERM) |
344 | scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_SUCCESS); | |
345 | else | |
6c12b52e LP |
346 | scope_enter_dead(s, SCOPE_SUCCESS); |
347 | ||
348 | return; | |
349 | ||
350 | fail: | |
f2341e0a | 351 | log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m"); |
6c12b52e LP |
352 | |
353 | scope_enter_dead(s, SCOPE_FAILURE_RESOURCES); | |
354 | } | |
355 | ||
356 | static int scope_start(Unit *u) { | |
357 | Scope *s = SCOPE(u); | |
358 | int r; | |
359 | ||
360 | assert(s); | |
361 | ||
efdb0237 LP |
362 | if (unit_has_name(u, SPECIAL_INIT_SCOPE)) |
363 | return -EPERM; | |
364 | ||
7b617155 LP |
365 | if (s->state == SCOPE_FAILED) |
366 | return -EPERM; | |
367 | ||
dd305ec9 | 368 | /* We can't fulfill this right now, please try again later */ |
3742095b | 369 | if (IN_SET(s->state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL)) |
6c12b52e LP |
370 | return -EAGAIN; |
371 | ||
372 | assert(s->state == SCOPE_DEAD); | |
373 | ||
2c289ea8 | 374 | if (!u->transient && !MANAGER_IS_RELOADING(u->manager)) |
6c12b52e LP |
375 | return -ENOENT; |
376 | ||
371c0b79 LP |
377 | (void) bus_scope_track_controller(s); |
378 | ||
4b58153d LP |
379 | r = unit_acquire_invocation_id(u); |
380 | if (r < 0) | |
381 | return r; | |
382 | ||
5ad096b3 | 383 | (void) unit_realize_cgroup(u); |
9b2559a1 | 384 | (void) unit_reset_accounting(u); |
5ad096b3 | 385 | |
01542056 | 386 | unit_export_state_files(u); |
d3070fbd | 387 | |
01542056 | 388 | r = unit_attach_pids_to_cgroup(u, u->pids, NULL); |
dd305ec9 | 389 | if (r < 0) { |
01542056 | 390 | log_unit_warning_errno(u, r, "Failed to add PIDs to scope's control group: %m"); |
68a01fb6 | 391 | scope_enter_dead(s, SCOPE_FAILURE_RESOURCES); |
6c12b52e | 392 | return r; |
dd305ec9 | 393 | } |
8d3e4ac7 LP |
394 | if (r == 0) { |
395 | log_unit_warning(u, "No PIDs left to attach to the scope's control group, refusing: %m"); | |
396 | scope_enter_dead(s, SCOPE_FAILURE_RESOURCES); | |
397 | return -ECHILD; | |
398 | } | |
399 | log_unit_debug(u, "%i %s added to scope's control group.", r, r == 1 ? "process" : "processes"); | |
6c12b52e | 400 | |
6c12b52e LP |
401 | s->result = SCOPE_SUCCESS; |
402 | ||
403 | scope_set_state(s, SCOPE_RUNNING); | |
b91ada2a | 404 | |
9ed7de60 | 405 | /* Set the maximum runtime timeout. */ |
5918a933 | 406 | scope_arm_timer(s, scope_running_timeout(s)); |
9ed7de60 | 407 | |
e9eec8b5 FB |
408 | /* On unified we use proper notifications hence we can unwatch the PIDs |
409 | * we just attached to the scope. This can also be done on legacy as | |
410 | * we're going to update the list of the processes we watch with the | |
411 | * PIDs currently in the scope anyway. */ | |
412 | unit_unwatch_all_pids(u); | |
413 | ||
414 | /* Start watching the PIDs currently in the scope (legacy hierarchy only) */ | |
01542056 | 415 | (void) unit_enqueue_rewatch_pids(u); |
82a2b6bb | 416 | return 1; |
6c12b52e LP |
417 | } |
418 | ||
419 | static int scope_stop(Unit *u) { | |
420 | Scope *s = SCOPE(u); | |
421 | ||
422 | assert(s); | |
6c12b52e | 423 | |
3742095b | 424 | if (IN_SET(s->state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL)) |
6c12b52e LP |
425 | return 0; |
426 | ||
3742095b | 427 | assert(IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED)); |
6c12b52e LP |
428 | |
429 | scope_enter_signal(s, SCOPE_STOP_SIGTERM, SCOPE_SUCCESS); | |
82a2b6bb | 430 | return 1; |
6c12b52e LP |
431 | } |
432 | ||
8bcca7e2 LP |
433 | static void scope_reset_failed(Unit *u) { |
434 | Scope *s = SCOPE(u); | |
435 | ||
436 | assert(s); | |
437 | ||
438 | if (s->state == SCOPE_FAILED) | |
439 | scope_set_state(s, SCOPE_DEAD); | |
440 | ||
441 | s->result = SCOPE_SUCCESS; | |
442 | } | |
443 | ||
718db961 | 444 | static int scope_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { |
6c12b52e LP |
445 | return unit_kill_common(u, who, signo, -1, -1, error); |
446 | } | |
447 | ||
7a7821c8 | 448 | static int scope_get_timeout(Unit *u, usec_t *timeout) { |
68db7a3b | 449 | Scope *s = SCOPE(u); |
7a7821c8 | 450 | usec_t t; |
68db7a3b ZJS |
451 | int r; |
452 | ||
453 | if (!s->timer_event_source) | |
454 | return 0; | |
455 | ||
7a7821c8 | 456 | r = sd_event_source_get_time(s->timer_event_source, &t); |
68db7a3b ZJS |
457 | if (r < 0) |
458 | return r; | |
7a7821c8 LP |
459 | if (t == USEC_INFINITY) |
460 | return 0; | |
68db7a3b | 461 | |
7a7821c8 | 462 | *timeout = t; |
68db7a3b ZJS |
463 | return 1; |
464 | } | |
465 | ||
6c12b52e LP |
466 | static int scope_serialize(Unit *u, FILE *f, FDSet *fds) { |
467 | Scope *s = SCOPE(u); | |
428a9f6f | 468 | void *pidp; |
6c12b52e LP |
469 | |
470 | assert(s); | |
471 | assert(f); | |
472 | assert(fds); | |
473 | ||
d68c645b LP |
474 | (void) serialize_item(f, "state", scope_state_to_string(s->state)); |
475 | (void) serialize_bool(f, "was-abandoned", s->was_abandoned); | |
33fe0afe LP |
476 | |
477 | if (s->controller) | |
d68c645b | 478 | (void) serialize_item(f, "controller", s->controller); |
33fe0afe | 479 | |
428a9f6f FB |
480 | SET_FOREACH(pidp, u->pids) |
481 | serialize_item_format(f, "pids", PID_FMT, PTR_TO_PID(pidp)); | |
482 | ||
6c12b52e LP |
483 | return 0; |
484 | } | |
485 | ||
486 | static int scope_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
487 | Scope *s = SCOPE(u); | |
33fe0afe | 488 | int r; |
6c12b52e LP |
489 | |
490 | assert(u); | |
491 | assert(key); | |
492 | assert(value); | |
493 | assert(fds); | |
494 | ||
495 | if (streq(key, "state")) { | |
496 | ScopeState state; | |
497 | ||
498 | state = scope_state_from_string(value); | |
499 | if (state < 0) | |
f2341e0a | 500 | log_unit_debug(u, "Failed to parse state value: %s", value); |
6c12b52e LP |
501 | else |
502 | s->deserialized_state = state; | |
503 | ||
3862e809 LP |
504 | } else if (streq(key, "was-abandoned")) { |
505 | int k; | |
506 | ||
507 | k = parse_boolean(value); | |
508 | if (k < 0) | |
509 | log_unit_debug(u, "Failed to parse boolean value: %s", value); | |
510 | else | |
511 | s->was_abandoned = k; | |
33fe0afe LP |
512 | } else if (streq(key, "controller")) { |
513 | ||
514 | r = free_and_strdup(&s->controller, value); | |
515 | if (r < 0) | |
d68c645b | 516 | return log_oom(); |
33fe0afe | 517 | |
428a9f6f FB |
518 | } else if (streq(key, "pids")) { |
519 | pid_t pid; | |
520 | ||
521 | if (parse_pid(value, &pid) < 0) | |
522 | log_unit_debug(u, "Failed to parse pids value: %s", value); | |
523 | else { | |
614f57ed | 524 | r = set_ensure_put(&u->pids, NULL, PID_TO_PTR(pid)); |
428a9f6f FB |
525 | if (r < 0) |
526 | return r; | |
527 | } | |
6c12b52e | 528 | } else |
f2341e0a | 529 | log_unit_debug(u, "Unknown serialization key: %s", key); |
6c12b52e LP |
530 | |
531 | return 0; | |
532 | } | |
533 | ||
a911bb9a LP |
534 | static void scope_notify_cgroup_empty_event(Unit *u) { |
535 | Scope *s = SCOPE(u); | |
536 | assert(u); | |
537 | ||
f2341e0a | 538 | log_unit_debug(u, "cgroup is empty"); |
a911bb9a LP |
539 | |
540 | if (IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL)) | |
541 | scope_enter_dead(s, SCOPE_SUCCESS); | |
e08dabfe AZ |
542 | |
543 | /* If the cgroup empty notification comes when the unit is not active, we must have failed to clean | |
544 | * up the cgroup earlier and should do it now. */ | |
545 | if (IN_SET(s->state, SCOPE_DEAD, SCOPE_FAILED)) | |
546 | unit_prune_cgroup(u); | |
a911bb9a LP |
547 | } |
548 | ||
549 | static void scope_sigchld_event(Unit *u, pid_t pid, int code, int status) { | |
11aef522 | 550 | assert(u); |
a911bb9a | 551 | |
11aef522 LP |
552 | /* If we get a SIGCHLD event for one of the processes we were interested in, then we look for others to |
553 | * watch, under the assumption that we'll sooner or later get a SIGCHLD for them, as the original | |
554 | * process we watched was probably the parent of them, and they are hence now our children. */ | |
a911bb9a | 555 | |
50be4f4a | 556 | (void) unit_enqueue_rewatch_pids(u); |
a911bb9a LP |
557 | } |
558 | ||
718db961 LP |
559 | static int scope_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
560 | Scope *s = SCOPE(userdata); | |
6c12b52e LP |
561 | |
562 | assert(s); | |
718db961 | 563 | assert(s->timer_event_source == source); |
6c12b52e LP |
564 | |
565 | switch (s->state) { | |
566 | ||
9ed7de60 PW |
567 | case SCOPE_RUNNING: |
568 | log_unit_warning(UNIT(s), "Scope reached runtime time limit. Stopping."); | |
569 | scope_enter_signal(s, SCOPE_STOP_SIGTERM, SCOPE_FAILURE_TIMEOUT); | |
570 | break; | |
571 | ||
6c12b52e LP |
572 | case SCOPE_STOP_SIGTERM: |
573 | if (s->kill_context.send_sigkill) { | |
f2341e0a | 574 | log_unit_warning(UNIT(s), "Stopping timed out. Killing."); |
6c12b52e LP |
575 | scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_FAILURE_TIMEOUT); |
576 | } else { | |
f2341e0a | 577 | log_unit_warning(UNIT(s), "Stopping timed out. Skipping SIGKILL."); |
6c12b52e LP |
578 | scope_enter_dead(s, SCOPE_FAILURE_TIMEOUT); |
579 | } | |
580 | ||
581 | break; | |
582 | ||
583 | case SCOPE_STOP_SIGKILL: | |
f2341e0a | 584 | log_unit_warning(UNIT(s), "Still around after SIGKILL. Ignoring."); |
6c12b52e LP |
585 | scope_enter_dead(s, SCOPE_FAILURE_TIMEOUT); |
586 | break; | |
587 | ||
588 | default: | |
04499a70 | 589 | assert_not_reached(); |
6c12b52e | 590 | } |
718db961 LP |
591 | |
592 | return 0; | |
6c12b52e LP |
593 | } |
594 | ||
a911bb9a LP |
595 | int scope_abandon(Scope *s) { |
596 | assert(s); | |
6c12b52e | 597 | |
efdb0237 LP |
598 | if (unit_has_name(UNIT(s), SPECIAL_INIT_SCOPE)) |
599 | return -EPERM; | |
600 | ||
a911bb9a LP |
601 | if (!IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED)) |
602 | return -ESTALE; | |
6c12b52e | 603 | |
3862e809 | 604 | s->was_abandoned = true; |
371c0b79 | 605 | |
a1e58e8e | 606 | s->controller = mfree(s->controller); |
371c0b79 LP |
607 | s->controller_track = sd_bus_track_unref(s->controller_track); |
608 | ||
8cb83266 | 609 | scope_set_state(s, SCOPE_ABANDONED); |
6c12b52e | 610 | |
50be4f4a LP |
611 | /* The client is no longer watching the remaining processes, so let's step in here, under the assumption that |
612 | * the remaining processes will be sooner or later reassigned to us as parent. */ | |
613 | (void) unit_enqueue_rewatch_pids(UNIT(s)); | |
6c12b52e | 614 | |
a911bb9a | 615 | return 0; |
6c12b52e LP |
616 | } |
617 | ||
618 | _pure_ static UnitActiveState scope_active_state(Unit *u) { | |
619 | assert(u); | |
620 | ||
621 | return state_translation_table[SCOPE(u)->state]; | |
622 | } | |
623 | ||
624 | _pure_ static const char *scope_sub_state_to_string(Unit *u) { | |
625 | assert(u); | |
626 | ||
627 | return scope_state_to_string(SCOPE(u)->state); | |
628 | } | |
629 | ||
04eb582a | 630 | static void scope_enumerate_perpetual(Manager *m) { |
efdb0237 LP |
631 | Unit *u; |
632 | int r; | |
633 | ||
634 | assert(m); | |
635 | ||
636 | /* Let's unconditionally add the "init.scope" special unit | |
637 | * that encapsulates PID 1. Note that PID 1 already is in the | |
638 | * cgroup for this, we hence just need to allocate the object | |
639 | * for it and that's it. */ | |
640 | ||
641 | u = manager_get_unit(m, SPECIAL_INIT_SCOPE); | |
642 | if (!u) { | |
a581e45a | 643 | r = unit_new_for_name(m, sizeof(Scope), SPECIAL_INIT_SCOPE, &u); |
efdb0237 | 644 | if (r < 0) { |
a581e45a | 645 | log_error_errno(r, "Failed to allocate the special " SPECIAL_INIT_SCOPE " unit: %m"); |
ba64af90 | 646 | return; |
efdb0237 LP |
647 | } |
648 | } | |
649 | ||
650 | u->transient = true; | |
f5869324 | 651 | u->perpetual = true; |
efdb0237 | 652 | SCOPE(u)->deserialized_state = SCOPE_RUNNING; |
efdb0237 LP |
653 | |
654 | unit_add_to_load_queue(u); | |
655 | unit_add_to_dbus_queue(u); | |
efdb0237 LP |
656 | } |
657 | ||
6c12b52e | 658 | static const char* const scope_result_table[_SCOPE_RESULT_MAX] = { |
48d83e33 | 659 | [SCOPE_SUCCESS] = "success", |
6c12b52e | 660 | [SCOPE_FAILURE_RESOURCES] = "resources", |
48d83e33 | 661 | [SCOPE_FAILURE_TIMEOUT] = "timeout", |
6c12b52e LP |
662 | }; |
663 | ||
664 | DEFINE_STRING_TABLE_LOOKUP(scope_result, ScopeResult); | |
665 | ||
666 | const UnitVTable scope_vtable = { | |
667 | .object_size = sizeof(Scope), | |
718db961 LP |
668 | .cgroup_context_offset = offsetof(Scope, cgroup_context), |
669 | .kill_context_offset = offsetof(Scope, kill_context), | |
670 | ||
6c12b52e LP |
671 | .sections = |
672 | "Unit\0" | |
673 | "Scope\0" | |
674 | "Install\0", | |
6c12b52e | 675 | .private_section = "Scope", |
6c12b52e | 676 | |
700e2d63 | 677 | .can_transient = true, |
1d9cc876 | 678 | .can_delegate = true, |
c80a9a33 | 679 | .can_fail = true, |
d4fd1cf2 | 680 | .once_only = true, |
4d824a4e | 681 | .can_set_managed_oom = true, |
6c12b52e LP |
682 | |
683 | .init = scope_init, | |
684 | .load = scope_load, | |
685 | .done = scope_done, | |
686 | ||
687 | .coldplug = scope_coldplug, | |
688 | ||
689 | .dump = scope_dump, | |
690 | ||
691 | .start = scope_start, | |
692 | .stop = scope_stop, | |
693 | ||
694 | .kill = scope_kill, | |
695 | ||
d9e45bc3 MS |
696 | .freeze = unit_freeze_vtable_common, |
697 | .thaw = unit_thaw_vtable_common, | |
698 | ||
68db7a3b ZJS |
699 | .get_timeout = scope_get_timeout, |
700 | ||
6c12b52e LP |
701 | .serialize = scope_serialize, |
702 | .deserialize_item = scope_deserialize_item, | |
703 | ||
704 | .active_state = scope_active_state, | |
705 | .sub_state_to_string = scope_sub_state_to_string, | |
706 | ||
a911bb9a LP |
707 | .sigchld_event = scope_sigchld_event, |
708 | ||
8bcca7e2 LP |
709 | .reset_failed = scope_reset_failed, |
710 | ||
6c12b52e LP |
711 | .notify_cgroup_empty = scope_notify_cgroup_empty_event, |
712 | ||
6c12b52e LP |
713 | .bus_set_property = bus_scope_set_property, |
714 | .bus_commit_properties = bus_scope_commit_properties, | |
715 | ||
04eb582a | 716 | .enumerate_perpetual = scope_enumerate_perpetual, |
6c12b52e | 717 | }; |