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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, | |
fff7c34c | 32 | [SCOPE_FAILED] = UNIT_FAILED, |
6c12b52e LP |
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; |
c9e120e0 | 44 | s->timeout_stop_usec = u->manager->defaults.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 | ||
e9276800 | 79 | static int scope_arm_timer(Scope *s, bool relative, usec_t usec) { |
718db961 LP |
80 | assert(s); |
81 | ||
e9276800 | 82 | return unit_arm_timer(UNIT(s), &s->timer_event_source, relative, usec, scope_dispatch_timer); |
6c12b52e LP |
83 | } |
84 | ||
85 | static void scope_set_state(Scope *s, ScopeState state) { | |
86 | ScopeState old_state; | |
87 | assert(s); | |
88 | ||
6fcbec6f LP |
89 | if (s->state != state) |
90 | bus_unit_send_pending_change_signal(UNIT(s), false); | |
91 | ||
6c12b52e LP |
92 | old_state = s->state; |
93 | s->state = state; | |
94 | ||
e1f85b49 | 95 | if (!IN_SET(state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL, SCOPE_START_CHOWN, SCOPE_RUNNING)) |
5dcadb4c | 96 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); |
6c12b52e | 97 | |
05d1630e | 98 | if (!IN_SET(old_state, SCOPE_DEAD, SCOPE_FAILED) && IN_SET(state, SCOPE_DEAD, SCOPE_FAILED)) { |
a911bb9a | 99 | unit_unwatch_all_pids(UNIT(s)); |
50be4f4a LP |
100 | unit_dequeue_rewatch_pids(UNIT(s)); |
101 | } | |
a911bb9a | 102 | |
6c12b52e | 103 | if (state != old_state) |
a911bb9a | 104 | log_debug("%s changed %s -> %s", UNIT(s)->id, scope_state_to_string(old_state), scope_state_to_string(state)); |
6c12b52e | 105 | |
96b09de5 | 106 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], /* reload_success = */ true); |
6c12b52e LP |
107 | } |
108 | ||
109 | static int scope_add_default_dependencies(Scope *s) { | |
3835b9aa LB |
110 | int r; |
111 | ||
6c12b52e LP |
112 | assert(s); |
113 | ||
4c9ea260 LP |
114 | if (!UNIT(s)->default_dependencies) |
115 | return 0; | |
116 | ||
6c12b52e | 117 | /* Make sure scopes are unloaded on shutdown */ |
3835b9aa LB |
118 | r = unit_add_two_dependencies_by_name( |
119 | UNIT(s), | |
120 | UNIT_BEFORE, UNIT_CONFLICTS, | |
121 | SPECIAL_SHUTDOWN_TARGET, true, | |
122 | UNIT_DEPENDENCY_DEFAULT); | |
123 | if (r < 0) | |
124 | return r; | |
125 | ||
126 | return 0; | |
6c12b52e LP |
127 | } |
128 | ||
129 | static int scope_verify(Scope *s) { | |
130 | assert(s); | |
75193d41 | 131 | assert(UNIT(s)->load_state == UNIT_LOADED); |
6c12b52e | 132 | |
efdb0237 | 133 | if (set_isempty(UNIT(s)->pids) && |
2c289ea8 | 134 | !MANAGER_IS_RELOADING(UNIT(s)->manager) && |
d85ff944 YW |
135 | !unit_has_name(UNIT(s), SPECIAL_INIT_SCOPE)) |
136 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOENT), "Scope has no PIDs. Refusing."); | |
6c12b52e LP |
137 | |
138 | return 0; | |
139 | } | |
140 | ||
8e4e851f LP |
141 | static int scope_load_init_scope(Unit *u) { |
142 | assert(u); | |
143 | ||
144 | if (!unit_has_name(u, SPECIAL_INIT_SCOPE)) | |
145 | return 0; | |
146 | ||
147 | u->transient = true; | |
f5869324 | 148 | u->perpetual = true; |
8e4e851f LP |
149 | |
150 | /* init.scope is a bit special, as it has to stick around forever. Because of its special semantics we | |
151 | * synthesize it here, instead of relying on the unit file on disk. */ | |
152 | ||
153 | u->default_dependencies = false; | |
8e4e851f LP |
154 | |
155 | /* Prettify things, if we can. */ | |
156 | if (!u->description) | |
157 | u->description = strdup("System and Service Manager"); | |
158 | if (!u->documentation) | |
159 | (void) strv_extend(&u->documentation, "man:systemd(1)"); | |
160 | ||
161 | return 1; | |
162 | } | |
163 | ||
75193d41 ZJS |
164 | static int scope_add_extras(Scope *s) { |
165 | int r; | |
166 | ||
167 | r = unit_patch_contexts(UNIT(s)); | |
168 | if (r < 0) | |
169 | return r; | |
170 | ||
171 | r = unit_set_default_slice(UNIT(s)); | |
172 | if (r < 0) | |
173 | return r; | |
174 | ||
5fa09835 | 175 | if (s->oom_policy < 0) |
c9e120e0 | 176 | s->oom_policy = s->cgroup_context.delegate ? OOM_CONTINUE : UNIT(s)->manager->defaults.oom_policy; |
5fa09835 ML |
177 | |
178 | s->cgroup_context.memory_oom_group = s->oom_policy == OOM_KILL; | |
179 | ||
75193d41 ZJS |
180 | return scope_add_default_dependencies(s); |
181 | } | |
182 | ||
6c12b52e LP |
183 | static int scope_load(Unit *u) { |
184 | Scope *s = SCOPE(u); | |
185 | int r; | |
186 | ||
187 | assert(s); | |
188 | assert(u->load_state == UNIT_STUB); | |
189 | ||
2c289ea8 | 190 | if (!u->transient && !MANAGER_IS_RELOADING(u->manager)) |
4f4afc88 | 191 | /* Refuse to load non-transient scope units, but allow them while reloading. */ |
6c12b52e LP |
192 | return -ENOENT; |
193 | ||
8e4e851f LP |
194 | r = scope_load_init_scope(u); |
195 | if (r < 0) | |
196 | return r; | |
c3620770 ZJS |
197 | |
198 | r = unit_load_fragment_and_dropin(u, false); | |
6c12b52e LP |
199 | if (r < 0) |
200 | return r; | |
201 | ||
75193d41 ZJS |
202 | if (u->load_state != UNIT_LOADED) |
203 | return 0; | |
6c12b52e | 204 | |
75193d41 ZJS |
205 | r = scope_add_extras(s); |
206 | if (r < 0) | |
207 | return r; | |
6c12b52e LP |
208 | |
209 | return scope_verify(s); | |
210 | } | |
211 | ||
7508f7f2 PW |
212 | static usec_t scope_coldplug_timeout(Scope *s) { |
213 | assert(s); | |
214 | ||
215 | switch (s->deserialized_state) { | |
216 | ||
9ed7de60 | 217 | case SCOPE_RUNNING: |
5918a933 | 218 | return scope_running_timeout(s); |
9ed7de60 | 219 | |
7508f7f2 PW |
220 | case SCOPE_STOP_SIGKILL: |
221 | case SCOPE_STOP_SIGTERM: | |
222 | return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_stop_usec); | |
223 | ||
224 | default: | |
225 | return USEC_INFINITY; | |
226 | } | |
227 | } | |
228 | ||
be847e82 | 229 | static int scope_coldplug(Unit *u) { |
6c12b52e LP |
230 | Scope *s = SCOPE(u); |
231 | int r; | |
232 | ||
233 | assert(s); | |
234 | assert(s->state == SCOPE_DEAD); | |
235 | ||
36c16a7c LP |
236 | if (s->deserialized_state == s->state) |
237 | return 0; | |
a911bb9a | 238 | |
e9276800 | 239 | r = scope_arm_timer(s, /* relative= */ false, scope_coldplug_timeout(s)); |
7508f7f2 PW |
240 | if (r < 0) |
241 | return r; | |
6c12b52e | 242 | |
428a9f6f FB |
243 | if (!IN_SET(s->deserialized_state, SCOPE_DEAD, SCOPE_FAILED)) { |
244 | if (u->pids) { | |
495e75ed | 245 | PidRef *pid; |
428a9f6f | 246 | |
495e75ed LP |
247 | SET_FOREACH(pid, u->pids) { |
248 | r = unit_watch_pidref(u, pid, /* exclusive= */ false); | |
428a9f6f FB |
249 | if (r < 0 && r != -EEXIST) |
250 | return r; | |
251 | } | |
252 | } else | |
253 | (void) unit_enqueue_rewatch_pids(u); | |
254 | } | |
36c16a7c | 255 | |
371c0b79 LP |
256 | bus_scope_track_controller(s); |
257 | ||
36c16a7c | 258 | scope_set_state(s, s->deserialized_state); |
6c12b52e LP |
259 | return 0; |
260 | } | |
261 | ||
262 | static void scope_dump(Unit *u, FILE *f, const char *prefix) { | |
263 | Scope *s = SCOPE(u); | |
264 | ||
265 | assert(s); | |
266 | assert(f); | |
267 | ||
268 | fprintf(f, | |
269 | "%sScope State: %s\n" | |
9ed7de60 | 270 | "%sResult: %s\n" |
5918a933 | 271 | "%sRuntimeMaxSec: %s\n" |
5fa09835 ML |
272 | "%sRuntimeRandomizedExtraSec: %s\n" |
273 | "%sOOMPolicy: %s\n", | |
6c12b52e | 274 | prefix, scope_state_to_string(s->state), |
9ed7de60 | 275 | prefix, scope_result_to_string(s->result), |
5918a933 | 276 | prefix, FORMAT_TIMESPAN(s->runtime_max_usec, USEC_PER_SEC), |
5fa09835 ML |
277 | prefix, FORMAT_TIMESPAN(s->runtime_rand_extra_usec, USEC_PER_SEC), |
278 | prefix, oom_policy_to_string(s->oom_policy)); | |
6c12b52e | 279 | |
bc0623df | 280 | cgroup_context_dump(UNIT(s), f, prefix); |
6c12b52e LP |
281 | kill_context_dump(&s->kill_context, f, prefix); |
282 | } | |
283 | ||
284 | static void scope_enter_dead(Scope *s, ScopeResult f) { | |
285 | assert(s); | |
286 | ||
a0fef983 | 287 | if (s->result == SCOPE_SUCCESS) |
6c12b52e LP |
288 | s->result = f; |
289 | ||
aac99f30 | 290 | unit_log_result(UNIT(s), s->result == SCOPE_SUCCESS, scope_result_to_string(s->result)); |
6c12b52e LP |
291 | scope_set_state(s, s->result != SCOPE_SUCCESS ? SCOPE_FAILED : SCOPE_DEAD); |
292 | } | |
293 | ||
294 | static void scope_enter_signal(Scope *s, ScopeState state, ScopeResult f) { | |
2d4a39e7 | 295 | bool skip_signal = false; |
6c12b52e LP |
296 | int r; |
297 | ||
298 | assert(s); | |
299 | ||
a0fef983 | 300 | if (s->result == SCOPE_SUCCESS) |
6c12b52e LP |
301 | s->result = f; |
302 | ||
50be4f4a LP |
303 | /* Before sending any signal, make sure we track all members of this cgroup */ |
304 | (void) unit_watch_all_pids(UNIT(s)); | |
305 | ||
306 | /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have | |
307 | * died now */ | |
308 | (void) unit_enqueue_rewatch_pids(UNIT(s)); | |
a911bb9a | 309 | |
371c0b79 LP |
310 | /* If we have a controller set let's ask the controller nicely to terminate the scope, instead of us going |
311 | * directly into SIGTERM berserk mode */ | |
2d4a39e7 LP |
312 | if (state == SCOPE_STOP_SIGTERM) |
313 | skip_signal = bus_scope_send_request_stop(s) > 0; | |
314 | ||
59ec09a8 ZJS |
315 | if (skip_signal) |
316 | r = 1; /* wait */ | |
317 | else { | |
2d4a39e7 LP |
318 | r = unit_kill_context( |
319 | UNIT(s), | |
320 | &s->kill_context, | |
3862e809 LP |
321 | state != SCOPE_STOP_SIGTERM ? KILL_KILL : |
322 | s->was_abandoned ? KILL_TERMINATE_AND_LOG : | |
323 | KILL_TERMINATE, | |
7901288a LP |
324 | /* main_pid= */ NULL, |
325 | /* control_pid= */ NULL, | |
326 | /* main_pid_alien= */ false); | |
c5acfe18 LP |
327 | if (r < 0) { |
328 | log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m"); | |
2d4a39e7 | 329 | goto fail; |
c5acfe18 | 330 | } |
59ec09a8 | 331 | } |
6c12b52e LP |
332 | |
333 | if (r > 0) { | |
e9276800 | 334 | r = scope_arm_timer(s, /* relative= */ true, s->timeout_stop_usec); |
c5acfe18 LP |
335 | if (r < 0) { |
336 | log_unit_warning_errno(UNIT(s), r, "Failed to install timer: %m"); | |
718db961 | 337 | goto fail; |
c5acfe18 | 338 | } |
6c12b52e LP |
339 | |
340 | scope_set_state(s, state); | |
ac84d1fb LP |
341 | } else if (state == SCOPE_STOP_SIGTERM) |
342 | scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_SUCCESS); | |
343 | else | |
6c12b52e LP |
344 | scope_enter_dead(s, SCOPE_SUCCESS); |
345 | ||
346 | return; | |
347 | ||
348 | fail: | |
6c12b52e LP |
349 | scope_enter_dead(s, SCOPE_FAILURE_RESOURCES); |
350 | } | |
351 | ||
03860190 | 352 | static int scope_enter_start_chown(Scope *s) { |
4775b55d | 353 | _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL; |
03860190 | 354 | Unit *u = UNIT(s); |
6c12b52e LP |
355 | int r; |
356 | ||
357 | assert(s); | |
03860190 | 358 | assert(s->user); |
6c12b52e | 359 | |
e9276800 | 360 | r = scope_arm_timer(s, /* relative= */ true, u->manager->defaults.timeout_start_usec); |
03860190 MS |
361 | if (r < 0) |
362 | return r; | |
efdb0237 | 363 | |
4775b55d | 364 | r = unit_fork_helper_process(u, "(sd-chown-cgroup)", &pidref); |
03860190 MS |
365 | if (r < 0) |
366 | goto fail; | |
7b617155 | 367 | |
03860190 MS |
368 | if (r == 0) { |
369 | uid_t uid = UID_INVALID; | |
370 | gid_t gid = GID_INVALID; | |
6c12b52e | 371 | |
03860190 MS |
372 | if (!isempty(s->user)) { |
373 | const char *user = s->user; | |
6c12b52e | 374 | |
03860190 MS |
375 | r = get_user_creds(&user, &uid, &gid, NULL, NULL, 0); |
376 | if (r < 0) { | |
377 | log_unit_error_errno(UNIT(s), r, "Failed to resolve user \"%s\": %m", user); | |
378 | _exit(EXIT_USER); | |
379 | } | |
380 | } | |
381 | ||
382 | if (!isempty(s->group)) { | |
383 | const char *group = s->group; | |
384 | ||
385 | r = get_group_creds(&group, &gid, 0); | |
386 | if (r < 0) { | |
387 | log_unit_error_errno(UNIT(s), r, "Failed to resolve group \"%s\": %m", group); | |
388 | _exit(EXIT_GROUP); | |
389 | } | |
390 | } | |
391 | ||
392 | r = cg_set_access(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, uid, gid); | |
393 | if (r < 0) { | |
394 | log_unit_error_errno(UNIT(s), r, "Failed to adjust control group access: %m"); | |
395 | _exit(EXIT_CGROUP); | |
396 | } | |
397 | ||
398 | _exit(EXIT_SUCCESS); | |
399 | } | |
400 | ||
495e75ed | 401 | r = unit_watch_pidref(UNIT(s), &pidref, /* exclusive= */ true); |
03860190 MS |
402 | if (r < 0) |
403 | goto fail; | |
404 | ||
405 | scope_set_state(s, SCOPE_START_CHOWN); | |
406 | ||
407 | return 1; | |
408 | fail: | |
409 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); | |
410 | return r; | |
411 | } | |
412 | ||
413 | static int scope_enter_running(Scope *s) { | |
414 | Unit *u = UNIT(s); | |
415 | int r; | |
416 | ||
417 | assert(s); | |
6c12b52e | 418 | |
371c0b79 LP |
419 | (void) bus_scope_track_controller(s); |
420 | ||
4b58153d LP |
421 | r = unit_acquire_invocation_id(u); |
422 | if (r < 0) | |
423 | return r; | |
424 | ||
01542056 | 425 | unit_export_state_files(u); |
d3070fbd | 426 | |
01542056 | 427 | r = unit_attach_pids_to_cgroup(u, u->pids, NULL); |
dd305ec9 | 428 | if (r < 0) { |
01542056 | 429 | log_unit_warning_errno(u, r, "Failed to add PIDs to scope's control group: %m"); |
648cb024 | 430 | goto fail; |
dd305ec9 | 431 | } |
8d3e4ac7 | 432 | if (r == 0) { |
648cb024 LP |
433 | r = log_unit_warning_errno(u, SYNTHETIC_ERRNO(ECHILD), "No PIDs left to attach to the scope's control group, refusing."); |
434 | goto fail; | |
8d3e4ac7 LP |
435 | } |
436 | log_unit_debug(u, "%i %s added to scope's control group.", r, r == 1 ? "process" : "processes"); | |
6c12b52e | 437 | |
6c12b52e LP |
438 | s->result = SCOPE_SUCCESS; |
439 | ||
440 | scope_set_state(s, SCOPE_RUNNING); | |
b91ada2a | 441 | |
9ed7de60 | 442 | /* Set the maximum runtime timeout. */ |
e9276800 | 443 | scope_arm_timer(s, /* relative= */ false, scope_running_timeout(s)); |
9ed7de60 | 444 | |
e9eec8b5 FB |
445 | /* On unified we use proper notifications hence we can unwatch the PIDs |
446 | * we just attached to the scope. This can also be done on legacy as | |
447 | * we're going to update the list of the processes we watch with the | |
448 | * PIDs currently in the scope anyway. */ | |
449 | unit_unwatch_all_pids(u); | |
450 | ||
451 | /* Start watching the PIDs currently in the scope (legacy hierarchy only) */ | |
01542056 | 452 | (void) unit_enqueue_rewatch_pids(u); |
82a2b6bb | 453 | return 1; |
648cb024 LP |
454 | |
455 | fail: | |
456 | scope_enter_dead(s, SCOPE_FAILURE_RESOURCES); | |
457 | return r; | |
6c12b52e LP |
458 | } |
459 | ||
03860190 MS |
460 | static int scope_start(Unit *u) { |
461 | Scope *s = SCOPE(u); | |
462 | ||
463 | assert(s); | |
464 | ||
465 | if (unit_has_name(u, SPECIAL_INIT_SCOPE)) | |
466 | return -EPERM; | |
467 | ||
468 | if (s->state == SCOPE_FAILED) | |
469 | return -EPERM; | |
470 | ||
471 | /* We can't fulfill this right now, please try again later */ | |
472 | if (IN_SET(s->state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL)) | |
473 | return -EAGAIN; | |
474 | ||
475 | assert(s->state == SCOPE_DEAD); | |
476 | ||
477 | if (!u->transient && !MANAGER_IS_RELOADING(u->manager)) | |
478 | return -ENOENT; | |
479 | ||
480 | (void) unit_realize_cgroup(u); | |
481 | (void) unit_reset_accounting(u); | |
482 | ||
483 | /* We check only for User= option to keep behavior consistent with logic for service units, | |
5c19169f | 484 | * i.e. having 'Delegate=true Group=foo' w/o specifying User= has no effect. */ |
03860190 MS |
485 | if (s->user && unit_cgroup_delegate(u)) |
486 | return scope_enter_start_chown(s); | |
487 | ||
488 | return scope_enter_running(s); | |
489 | } | |
490 | ||
6c12b52e LP |
491 | static int scope_stop(Unit *u) { |
492 | Scope *s = SCOPE(u); | |
493 | ||
494 | assert(s); | |
6c12b52e | 495 | |
3742095b | 496 | if (IN_SET(s->state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL)) |
6c12b52e LP |
497 | return 0; |
498 | ||
3742095b | 499 | assert(IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED)); |
6c12b52e LP |
500 | |
501 | scope_enter_signal(s, SCOPE_STOP_SIGTERM, SCOPE_SUCCESS); | |
82a2b6bb | 502 | return 1; |
6c12b52e LP |
503 | } |
504 | ||
8bcca7e2 LP |
505 | static void scope_reset_failed(Unit *u) { |
506 | Scope *s = SCOPE(u); | |
507 | ||
508 | assert(s); | |
509 | ||
510 | if (s->state == SCOPE_FAILED) | |
511 | scope_set_state(s, SCOPE_DEAD); | |
512 | ||
513 | s->result = SCOPE_SUCCESS; | |
514 | } | |
515 | ||
7a7821c8 | 516 | static int scope_get_timeout(Unit *u, usec_t *timeout) { |
68db7a3b | 517 | Scope *s = SCOPE(u); |
7a7821c8 | 518 | usec_t t; |
68db7a3b ZJS |
519 | int r; |
520 | ||
521 | if (!s->timer_event_source) | |
522 | return 0; | |
523 | ||
7a7821c8 | 524 | r = sd_event_source_get_time(s->timer_event_source, &t); |
68db7a3b ZJS |
525 | if (r < 0) |
526 | return r; | |
7a7821c8 LP |
527 | if (t == USEC_INFINITY) |
528 | return 0; | |
68db7a3b | 529 | |
7a7821c8 | 530 | *timeout = t; |
68db7a3b ZJS |
531 | return 1; |
532 | } | |
533 | ||
6c12b52e LP |
534 | static int scope_serialize(Unit *u, FILE *f, FDSet *fds) { |
535 | Scope *s = SCOPE(u); | |
495e75ed | 536 | PidRef *pid; |
6c12b52e LP |
537 | |
538 | assert(s); | |
539 | assert(f); | |
540 | assert(fds); | |
541 | ||
d68c645b LP |
542 | (void) serialize_item(f, "state", scope_state_to_string(s->state)); |
543 | (void) serialize_bool(f, "was-abandoned", s->was_abandoned); | |
33fe0afe LP |
544 | |
545 | if (s->controller) | |
d68c645b | 546 | (void) serialize_item(f, "controller", s->controller); |
33fe0afe | 547 | |
495e75ed | 548 | SET_FOREACH(pid, u->pids) |
2a7451dc | 549 | serialize_pidref(f, fds, "pids", pid); |
428a9f6f | 550 | |
6c12b52e LP |
551 | return 0; |
552 | } | |
553 | ||
554 | static int scope_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
555 | Scope *s = SCOPE(u); | |
33fe0afe | 556 | int r; |
6c12b52e LP |
557 | |
558 | assert(u); | |
559 | assert(key); | |
560 | assert(value); | |
561 | assert(fds); | |
562 | ||
563 | if (streq(key, "state")) { | |
564 | ScopeState state; | |
565 | ||
566 | state = scope_state_from_string(value); | |
567 | if (state < 0) | |
f2341e0a | 568 | log_unit_debug(u, "Failed to parse state value: %s", value); |
6c12b52e LP |
569 | else |
570 | s->deserialized_state = state; | |
571 | ||
3862e809 LP |
572 | } else if (streq(key, "was-abandoned")) { |
573 | int k; | |
574 | ||
575 | k = parse_boolean(value); | |
576 | if (k < 0) | |
577 | log_unit_debug(u, "Failed to parse boolean value: %s", value); | |
578 | else | |
579 | s->was_abandoned = k; | |
33fe0afe LP |
580 | } else if (streq(key, "controller")) { |
581 | ||
582 | r = free_and_strdup(&s->controller, value); | |
583 | if (r < 0) | |
d68c645b | 584 | return log_oom(); |
33fe0afe | 585 | |
428a9f6f | 586 | } else if (streq(key, "pids")) { |
2a7451dc | 587 | _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL; |
495e75ed | 588 | |
2a7451dc LP |
589 | if (deserialize_pidref(fds, value, &pidref) >= 0) { |
590 | r = unit_watch_pidref(u, &pidref, /* exclusive= */ false); | |
591 | if (r < 0) | |
592 | log_unit_debug(u, "Failed to watch PID, ignoring: %s", value); | |
593 | } | |
6c12b52e | 594 | } else |
f2341e0a | 595 | log_unit_debug(u, "Unknown serialization key: %s", key); |
6c12b52e LP |
596 | |
597 | return 0; | |
598 | } | |
599 | ||
a911bb9a LP |
600 | static void scope_notify_cgroup_empty_event(Unit *u) { |
601 | Scope *s = SCOPE(u); | |
602 | assert(u); | |
603 | ||
f2341e0a | 604 | log_unit_debug(u, "cgroup is empty"); |
a911bb9a LP |
605 | |
606 | if (IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL)) | |
607 | scope_enter_dead(s, SCOPE_SUCCESS); | |
608 | } | |
609 | ||
7238fd51 | 610 | static void scope_notify_cgroup_oom_event(Unit *u, bool managed_oom) { |
611 | Scope *s = SCOPE(u); | |
612 | ||
613 | if (managed_oom) | |
614 | log_unit_debug(u, "Process(es) of control group were killed by systemd-oomd."); | |
615 | else | |
616 | log_unit_debug(u, "Process of control group was killed by the OOM killer."); | |
617 | ||
5fa09835 ML |
618 | if (s->oom_policy == OOM_CONTINUE) |
619 | return; | |
620 | ||
7238fd51 | 621 | switch (s->state) { |
622 | ||
623 | case SCOPE_START_CHOWN: | |
624 | case SCOPE_RUNNING: | |
5fa09835 ML |
625 | scope_enter_signal(s, SCOPE_STOP_SIGTERM, SCOPE_FAILURE_OOM_KILL); |
626 | break; | |
627 | ||
7238fd51 | 628 | case SCOPE_STOP_SIGTERM: |
629 | scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_FAILURE_OOM_KILL); | |
630 | break; | |
631 | ||
632 | case SCOPE_STOP_SIGKILL: | |
633 | if (s->result == SCOPE_SUCCESS) | |
634 | s->result = SCOPE_FAILURE_OOM_KILL; | |
635 | break; | |
636 | /* SCOPE_DEAD, SCOPE_ABANDONED, and SCOPE_FAILED end up in default */ | |
637 | default: | |
638 | ; | |
639 | } | |
640 | } | |
641 | ||
a911bb9a | 642 | static void scope_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
03860190 MS |
643 | Scope *s = SCOPE(u); |
644 | ||
645 | assert(s); | |
646 | ||
647 | if (s->state == SCOPE_START_CHOWN) { | |
648 | if (!is_clean_exit(code, status, EXIT_CLEAN_COMMAND, NULL)) | |
649 | scope_enter_dead(s, SCOPE_FAILURE_RESOURCES); | |
650 | else | |
651 | scope_enter_running(s); | |
652 | return; | |
653 | } | |
a911bb9a | 654 | |
11aef522 LP |
655 | /* If we get a SIGCHLD event for one of the processes we were interested in, then we look for others to |
656 | * watch, under the assumption that we'll sooner or later get a SIGCHLD for them, as the original | |
657 | * process we watched was probably the parent of them, and they are hence now our children. */ | |
a911bb9a | 658 | |
50be4f4a | 659 | (void) unit_enqueue_rewatch_pids(u); |
a911bb9a LP |
660 | } |
661 | ||
718db961 LP |
662 | static int scope_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
663 | Scope *s = SCOPE(userdata); | |
6c12b52e LP |
664 | |
665 | assert(s); | |
718db961 | 666 | assert(s->timer_event_source == source); |
6c12b52e LP |
667 | |
668 | switch (s->state) { | |
669 | ||
9ed7de60 PW |
670 | case SCOPE_RUNNING: |
671 | log_unit_warning(UNIT(s), "Scope reached runtime time limit. Stopping."); | |
672 | scope_enter_signal(s, SCOPE_STOP_SIGTERM, SCOPE_FAILURE_TIMEOUT); | |
673 | break; | |
674 | ||
6c12b52e LP |
675 | case SCOPE_STOP_SIGTERM: |
676 | if (s->kill_context.send_sigkill) { | |
f2341e0a | 677 | log_unit_warning(UNIT(s), "Stopping timed out. Killing."); |
6c12b52e LP |
678 | scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_FAILURE_TIMEOUT); |
679 | } else { | |
f2341e0a | 680 | log_unit_warning(UNIT(s), "Stopping timed out. Skipping SIGKILL."); |
6c12b52e LP |
681 | scope_enter_dead(s, SCOPE_FAILURE_TIMEOUT); |
682 | } | |
683 | ||
684 | break; | |
685 | ||
686 | case SCOPE_STOP_SIGKILL: | |
f2341e0a | 687 | log_unit_warning(UNIT(s), "Still around after SIGKILL. Ignoring."); |
6c12b52e LP |
688 | scope_enter_dead(s, SCOPE_FAILURE_TIMEOUT); |
689 | break; | |
690 | ||
03860190 MS |
691 | case SCOPE_START_CHOWN: |
692 | log_unit_warning(UNIT(s), "User lookup timed out. Entering failed state."); | |
693 | scope_enter_dead(s, SCOPE_FAILURE_TIMEOUT); | |
694 | break; | |
695 | ||
6c12b52e | 696 | default: |
04499a70 | 697 | assert_not_reached(); |
6c12b52e | 698 | } |
718db961 LP |
699 | |
700 | return 0; | |
6c12b52e LP |
701 | } |
702 | ||
a911bb9a LP |
703 | int scope_abandon(Scope *s) { |
704 | assert(s); | |
6c12b52e | 705 | |
efdb0237 LP |
706 | if (unit_has_name(UNIT(s), SPECIAL_INIT_SCOPE)) |
707 | return -EPERM; | |
708 | ||
a911bb9a LP |
709 | if (!IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED)) |
710 | return -ESTALE; | |
6c12b52e | 711 | |
3862e809 | 712 | s->was_abandoned = true; |
371c0b79 | 713 | |
a1e58e8e | 714 | s->controller = mfree(s->controller); |
371c0b79 LP |
715 | s->controller_track = sd_bus_track_unref(s->controller_track); |
716 | ||
8cb83266 | 717 | scope_set_state(s, SCOPE_ABANDONED); |
6c12b52e | 718 | |
50be4f4a LP |
719 | /* The client is no longer watching the remaining processes, so let's step in here, under the assumption that |
720 | * the remaining processes will be sooner or later reassigned to us as parent. */ | |
721 | (void) unit_enqueue_rewatch_pids(UNIT(s)); | |
6c12b52e | 722 | |
a911bb9a | 723 | return 0; |
6c12b52e LP |
724 | } |
725 | ||
d1e8e8b5 | 726 | static UnitActiveState scope_active_state(Unit *u) { |
6c12b52e LP |
727 | assert(u); |
728 | ||
729 | return state_translation_table[SCOPE(u)->state]; | |
730 | } | |
731 | ||
d1e8e8b5 | 732 | static const char *scope_sub_state_to_string(Unit *u) { |
6c12b52e LP |
733 | assert(u); |
734 | ||
735 | return scope_state_to_string(SCOPE(u)->state); | |
736 | } | |
737 | ||
04eb582a | 738 | static void scope_enumerate_perpetual(Manager *m) { |
efdb0237 LP |
739 | Unit *u; |
740 | int r; | |
741 | ||
742 | assert(m); | |
743 | ||
744 | /* Let's unconditionally add the "init.scope" special unit | |
745 | * that encapsulates PID 1. Note that PID 1 already is in the | |
746 | * cgroup for this, we hence just need to allocate the object | |
747 | * for it and that's it. */ | |
748 | ||
749 | u = manager_get_unit(m, SPECIAL_INIT_SCOPE); | |
750 | if (!u) { | |
a581e45a | 751 | r = unit_new_for_name(m, sizeof(Scope), SPECIAL_INIT_SCOPE, &u); |
efdb0237 | 752 | if (r < 0) { |
a581e45a | 753 | log_error_errno(r, "Failed to allocate the special " SPECIAL_INIT_SCOPE " unit: %m"); |
ba64af90 | 754 | return; |
efdb0237 LP |
755 | } |
756 | } | |
757 | ||
758 | u->transient = true; | |
f5869324 | 759 | u->perpetual = true; |
efdb0237 | 760 | SCOPE(u)->deserialized_state = SCOPE_RUNNING; |
efdb0237 LP |
761 | |
762 | unit_add_to_load_queue(u); | |
763 | unit_add_to_dbus_queue(u); | |
020b2e41 LB |
764 | /* Enqueue an explicit cgroup realization here. Unlike other cgroups this one already exists and is |
765 | * populated (by us, after all!) already, even when we are not in a reload cycle. Hence we cannot | |
766 | * apply the settings at creation time anymore, but let's at least apply them asynchronously. */ | |
767 | unit_add_to_cgroup_realize_queue(u); | |
efdb0237 LP |
768 | } |
769 | ||
6c12b52e | 770 | static const char* const scope_result_table[_SCOPE_RESULT_MAX] = { |
48d83e33 | 771 | [SCOPE_SUCCESS] = "success", |
6c12b52e | 772 | [SCOPE_FAILURE_RESOURCES] = "resources", |
48d83e33 | 773 | [SCOPE_FAILURE_TIMEOUT] = "timeout", |
7238fd51 | 774 | [SCOPE_FAILURE_OOM_KILL] = "oom-kill", |
6c12b52e LP |
775 | }; |
776 | ||
777 | DEFINE_STRING_TABLE_LOOKUP(scope_result, ScopeResult); | |
778 | ||
779 | const UnitVTable scope_vtable = { | |
780 | .object_size = sizeof(Scope), | |
718db961 LP |
781 | .cgroup_context_offset = offsetof(Scope, cgroup_context), |
782 | .kill_context_offset = offsetof(Scope, kill_context), | |
783 | ||
6c12b52e LP |
784 | .sections = |
785 | "Unit\0" | |
786 | "Scope\0" | |
787 | "Install\0", | |
6c12b52e | 788 | .private_section = "Scope", |
6c12b52e | 789 | |
700e2d63 | 790 | .can_transient = true, |
1d9cc876 | 791 | .can_delegate = true, |
c80a9a33 | 792 | .can_fail = true, |
d4fd1cf2 | 793 | .once_only = true, |
4d824a4e | 794 | .can_set_managed_oom = true, |
6c12b52e LP |
795 | |
796 | .init = scope_init, | |
797 | .load = scope_load, | |
798 | .done = scope_done, | |
799 | ||
800 | .coldplug = scope_coldplug, | |
801 | ||
802 | .dump = scope_dump, | |
803 | ||
804 | .start = scope_start, | |
805 | .stop = scope_stop, | |
806 | ||
d9e45bc3 MS |
807 | .freeze = unit_freeze_vtable_common, |
808 | .thaw = unit_thaw_vtable_common, | |
809 | ||
68db7a3b ZJS |
810 | .get_timeout = scope_get_timeout, |
811 | ||
6c12b52e LP |
812 | .serialize = scope_serialize, |
813 | .deserialize_item = scope_deserialize_item, | |
814 | ||
815 | .active_state = scope_active_state, | |
816 | .sub_state_to_string = scope_sub_state_to_string, | |
817 | ||
a911bb9a LP |
818 | .sigchld_event = scope_sigchld_event, |
819 | ||
8bcca7e2 LP |
820 | .reset_failed = scope_reset_failed, |
821 | ||
6c12b52e | 822 | .notify_cgroup_empty = scope_notify_cgroup_empty_event, |
7238fd51 | 823 | .notify_cgroup_oom = scope_notify_cgroup_oom_event, |
6c12b52e | 824 | |
6c12b52e LP |
825 | .bus_set_property = bus_scope_set_property, |
826 | .bus_commit_properties = bus_scope_commit_properties, | |
827 | ||
04eb582a | 828 | .enumerate_perpetual = scope_enumerate_perpetual, |
6c12b52e | 829 | }; |