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