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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
a7334b09 | 2 | |
87f0e418 | 3 | #include <errno.h> |
0301abf4 | 4 | #include <stdlib.h> |
4c253ed1 | 5 | #include <sys/prctl.h> |
4f5dd394 | 6 | #include <unistd.h> |
87f0e418 | 7 | |
718db961 LP |
8 | #include "sd-id128.h" |
9 | #include "sd-messages.h" | |
4f5dd394 | 10 | |
57b7a260 | 11 | #include "all-units.h" |
d68c645b | 12 | #include "alloc-util.h" |
fab34748 | 13 | #include "bpf-firewall.h" |
5f8ba20d | 14 | #include "bpf-foreign.h" |
cd09a5f3 | 15 | #include "bpf-socket-bind.h" |
4f5dd394 | 16 | #include "bus-common-errors.h" |
8df433d7 | 17 | #include "bus-internal.h" |
4f5dd394 | 18 | #include "bus-util.h" |
fdb3deca | 19 | #include "cgroup-setup.h" |
c6c18be3 | 20 | #include "cgroup-util.h" |
f461a28d | 21 | #include "chase.h" |
e30bbc90 | 22 | #include "core-varlink.h" |
4f5dd394 LP |
23 | #include "dbus-unit.h" |
24 | #include "dbus.h" | |
25 | #include "dropin.h" | |
88e4bfa6 | 26 | #include "env-util.h" |
4f5dd394 | 27 | #include "escape.h" |
43962c30 | 28 | #include "exec-credential.h" |
4f5dd394 | 29 | #include "execute.h" |
6a48d82f | 30 | #include "fd-util.h" |
a5c32cff | 31 | #include "fileio-label.h" |
ee228be1 | 32 | #include "fileio.h" |
f97b34a6 | 33 | #include "format-util.h" |
4b58153d | 34 | #include "id128-util.h" |
5cfa33e0 | 35 | #include "install.h" |
bd1ae178 | 36 | #include "iovec-util.h" |
0690160e | 37 | #include "label-util.h" |
4f5dd394 LP |
38 | #include "load-dropin.h" |
39 | #include "load-fragment.h" | |
40 | #include "log.h" | |
8c41640a | 41 | #include "logarithm.h" |
4f5dd394 | 42 | #include "macro.h" |
35cd0ba5 | 43 | #include "mkdir-label.h" |
4f5dd394 | 44 | #include "path-util.h" |
0b452006 | 45 | #include "process-util.h" |
810ef318 | 46 | #include "rm-rf.h" |
48b92b37 | 47 | #include "serialize.h" |
4f5dd394 | 48 | #include "set.h" |
6eb7c172 | 49 | #include "signal-util.h" |
d3070fbd | 50 | #include "sparse-endian.h" |
e9db43d5 | 51 | #include "special.h" |
2e59b241 | 52 | #include "specifier.h" |
8fcde012 | 53 | #include "stat-util.h" |
d054f0a4 | 54 | #include "stdio-util.h" |
5afe510c | 55 | #include "string-table.h" |
07630cea | 56 | #include "string-util.h" |
4f5dd394 | 57 | #include "strv.h" |
5b262f74 | 58 | #include "terminal-util.h" |
e4de7287 | 59 | #include "tmpfile-util.h" |
4f4afc88 | 60 | #include "umask-util.h" |
4f5dd394 | 61 | #include "unit-name.h" |
e9db43d5 | 62 | #include "unit.h" |
b1d4f8e1 LP |
63 | #include "user-util.h" |
64 | #include "virt.h" | |
91ce91c7 JK |
65 | #if BPF_FRAMEWORK |
66 | #include "bpf-link.h" | |
67 | #endif | |
87f0e418 | 68 | |
37109b85 | 69 | /* Thresholds for logging at INFO level about resource consumption */ |
b1b84bc5 MY |
70 | #define MENTIONWORTHY_CPU_NSEC (1 * NSEC_PER_SEC) |
71 | #define MENTIONWORTHY_MEMORY_BYTES (64 * U64_MB) | |
72 | #define MENTIONWORTHY_IO_BYTES (1 * U64_MB) | |
73 | #define MENTIONWORTHY_IP_BYTES UINT64_C(0) | |
37109b85 | 74 | |
b1b84bc5 MY |
75 | /* Thresholds for logging at NOTICE level about resource consumption */ |
76 | #define NOTICEWORTHY_CPU_NSEC (10 * NSEC_PER_MINUTE) | |
77 | #define NOTICEWORTHY_MEMORY_BYTES (512 * U64_MB) | |
78 | #define NOTICEWORTHY_IO_BYTES (10 * U64_MB) | |
79 | #define NOTICEWORTHY_IP_BYTES (128 * U64_MB) | |
37109b85 | 80 | |
87f0e418 | 81 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { |
17f6b640 YW |
82 | [UNIT_SERVICE] = &service_vtable, |
83 | [UNIT_SOCKET] = &socket_vtable, | |
84 | [UNIT_TARGET] = &target_vtable, | |
85 | [UNIT_DEVICE] = &device_vtable, | |
86 | [UNIT_MOUNT] = &mount_vtable, | |
87f0e418 | 87 | [UNIT_AUTOMOUNT] = &automount_vtable, |
17f6b640 YW |
88 | [UNIT_SWAP] = &swap_vtable, |
89 | [UNIT_TIMER] = &timer_vtable, | |
90 | [UNIT_PATH] = &path_vtable, | |
91 | [UNIT_SLICE] = &slice_vtable, | |
92 | [UNIT_SCOPE] = &scope_vtable, | |
87f0e418 LP |
93 | }; |
94 | ||
75db809a | 95 | Unit* unit_new(Manager *m, size_t size) { |
87f0e418 LP |
96 | Unit *u; |
97 | ||
98 | assert(m); | |
ac155bb8 | 99 | assert(size >= sizeof(Unit)); |
87f0e418 | 100 | |
7d17cfbc MS |
101 | u = malloc0(size); |
102 | if (!u) | |
87f0e418 LP |
103 | return NULL; |
104 | ||
ac155bb8 MS |
105 | u->manager = m; |
106 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
107 | u->default_dependencies = true; |
108 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 109 | u->unit_file_preset = -1; |
d420282b | 110 | u->on_failure_job_mode = JOB_REPLACE; |
294446dc | 111 | u->on_success_job_mode = JOB_FAIL; |
36c16a7c | 112 | u->job_timeout = USEC_INFINITY; |
a2df3ea4 | 113 | u->job_running_timeout = USEC_INFINITY; |
00d9ef85 LP |
114 | u->ref_uid = UID_INVALID; |
115 | u->ref_gid = GID_INVALID; | |
9824ab1f | 116 | |
7af67e9a | 117 | u->failure_action_exit_status = u->success_action_exit_status = -1; |
87f0e418 | 118 | |
2e59b241 LP |
119 | u->last_section_private = -1; |
120 | ||
fed25720 | 121 | u->start_ratelimit = (const RateLimit) { |
c9e120e0 | 122 | m->defaults.start_limit_interval, |
fed25720 | 123 | m->defaults.start_limit_burst, |
c9e120e0 LP |
124 | }; |
125 | ||
9cc54544 LP |
126 | u->auto_start_stop_ratelimit = (const RateLimit) { |
127 | .interval = 10 * USEC_PER_SEC, | |
128 | .burst = 16 | |
129 | }; | |
130 | ||
131 | unit_reset_memory_accounting_last(u); | |
132 | unit_reset_io_accounting_last(u); | |
bea355da | 133 | |
87f0e418 LP |
134 | return u; |
135 | } | |
136 | ||
a581e45a | 137 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
dc409696 | 138 | _cleanup_(unit_freep) Unit *u = NULL; |
a581e45a LP |
139 | int r; |
140 | ||
141 | u = unit_new(m, size); | |
142 | if (!u) | |
143 | return -ENOMEM; | |
144 | ||
145 | r = unit_add_name(u, name); | |
dc409696 | 146 | if (r < 0) |
a581e45a | 147 | return r; |
a581e45a | 148 | |
1cc6c93a YW |
149 | *ret = TAKE_PTR(u); |
150 | ||
a581e45a LP |
151 | return r; |
152 | } | |
153 | ||
303ee601 | 154 | bool unit_has_name(const Unit *u, const char *name) { |
f278026d LP |
155 | assert(u); |
156 | assert(name); | |
157 | ||
4562c355 ZJS |
158 | return streq_ptr(name, u->id) || |
159 | set_contains(u->aliases, name); | |
f278026d LP |
160 | } |
161 | ||
598459ce LP |
162 | static void unit_init(Unit *u) { |
163 | CGroupContext *cc; | |
164 | ExecContext *ec; | |
165 | KillContext *kc; | |
166 | ||
167 | assert(u); | |
168 | assert(u->manager); | |
169 | assert(u->type >= 0); | |
170 | ||
171 | cc = unit_get_cgroup_context(u); | |
172 | if (cc) { | |
173 | cgroup_context_init(cc); | |
174 | ||
175 | /* Copy in the manager defaults into the cgroup | |
176 | * context, _before_ the rest of the settings have | |
177 | * been initialized */ | |
178 | ||
c9e120e0 LP |
179 | cc->cpu_accounting = u->manager->defaults.cpu_accounting; |
180 | cc->io_accounting = u->manager->defaults.io_accounting; | |
181 | cc->blockio_accounting = u->manager->defaults.blockio_accounting; | |
182 | cc->memory_accounting = u->manager->defaults.memory_accounting; | |
183 | cc->tasks_accounting = u->manager->defaults.tasks_accounting; | |
184 | cc->ip_accounting = u->manager->defaults.ip_accounting; | |
0af20ea2 LP |
185 | |
186 | if (u->type != UNIT_SLICE) | |
c9e120e0 | 187 | cc->tasks_max = u->manager->defaults.tasks_max; |
6bb00842 | 188 | |
c9e120e0 LP |
189 | cc->memory_pressure_watch = u->manager->defaults.memory_pressure_watch; |
190 | cc->memory_pressure_threshold_usec = u->manager->defaults.memory_pressure_threshold_usec; | |
598459ce LP |
191 | } |
192 | ||
193 | ec = unit_get_exec_context(u); | |
b1edf445 | 194 | if (ec) { |
598459ce LP |
195 | exec_context_init(ec); |
196 | ||
c9e120e0 LP |
197 | if (u->manager->defaults.oom_score_adjust_set) { |
198 | ec->oom_score_adjust = u->manager->defaults.oom_score_adjust; | |
d4a402e4 LP |
199 | ec->oom_score_adjust_set = true; |
200 | } | |
201 | ||
5e37d193 FB |
202 | if (MANAGER_IS_SYSTEM(u->manager)) |
203 | ec->keyring_mode = EXEC_KEYRING_SHARED; | |
204 | else { | |
205 | ec->keyring_mode = EXEC_KEYRING_INHERIT; | |
206 | ||
207 | /* User manager might have its umask redefined by PAM or UMask=. In this | |
208 | * case let the units it manages inherit this value by default. They can | |
209 | * still tune this value through their own unit file */ | |
41beeb3e | 210 | (void) get_process_umask(0, &ec->umask); |
5e37d193 | 211 | } |
b1edf445 LP |
212 | } |
213 | ||
598459ce LP |
214 | kc = unit_get_kill_context(u); |
215 | if (kc) | |
216 | kill_context_init(kc); | |
217 | ||
218 | if (UNIT_VTABLE(u)->init) | |
219 | UNIT_VTABLE(u)->init(u); | |
220 | } | |
221 | ||
4562c355 ZJS |
222 | static int unit_add_alias(Unit *u, char *donated_name) { |
223 | int r; | |
224 | ||
225 | /* Make sure that u->names is allocated. We may leave u->names | |
226 | * empty if we fail later, but this is not a problem. */ | |
973bc32a | 227 | r = set_ensure_put(&u->aliases, &string_hash_ops, donated_name); |
4562c355 ZJS |
228 | if (r < 0) |
229 | return r; | |
230 | assert(r > 0); | |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
87f0e418 | 235 | int unit_add_name(Unit *u, const char *text) { |
4562c355 | 236 | _cleanup_free_ char *name = NULL, *instance = NULL; |
87f0e418 | 237 | UnitType t; |
87f0e418 LP |
238 | int r; |
239 | ||
240 | assert(u); | |
241 | assert(text); | |
242 | ||
7410616c | 243 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 244 | if (!u->instance) |
acd1987a | 245 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
4e494e6a | 246 | "Instance is not set when adding name '%s'.", text); |
87f0e418 | 247 | |
4562c355 | 248 | r = unit_name_replace_instance(text, u->instance, &name); |
7410616c | 249 | if (r < 0) |
acd1987a | 250 | return log_unit_debug_errno(u, r, |
4e494e6a | 251 | "Failed to build instance name from '%s': %m", text); |
7410616c | 252 | } else { |
4562c355 ZJS |
253 | name = strdup(text); |
254 | if (!name) | |
7410616c LP |
255 | return -ENOMEM; |
256 | } | |
87f0e418 | 257 | |
4562c355 | 258 | if (unit_has_name(u, name)) |
7410616c | 259 | return 0; |
4562c355 ZJS |
260 | |
261 | if (hashmap_contains(u->manager->units, name)) | |
acd1987a | 262 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EEXIST), |
4e494e6a | 263 | "Unit already exist when adding name '%s'.", name); |
7410616c | 264 | |
4562c355 | 265 | if (!unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) |
acd1987a | 266 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
4e494e6a | 267 | "Name '%s' is invalid.", name); |
e537352b | 268 | |
4562c355 | 269 | t = unit_name_to_type(name); |
7410616c | 270 | if (t < 0) |
acd1987a | 271 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
4e494e6a | 272 | "failed to derive unit type from name '%s'.", name); |
87f0e418 | 273 | |
598459ce | 274 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
acd1987a | 275 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
4e494e6a | 276 | "Unit type is illegal: u->type(%d) and t(%d) for name '%s'.", |
4562c355 | 277 | u->type, t, name); |
87f0e418 | 278 | |
4562c355 | 279 | r = unit_name_to_instance(name, &instance); |
e48614c4 | 280 | if (r < 0) |
4e494e6a | 281 | return log_unit_debug_errno(u, r, "Failed to extract instance from name '%s': %m", name); |
87f0e418 | 282 | |
4562c355 | 283 | if (instance && !unit_type_may_template(t)) |
4e494e6a | 284 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), "Templates are not allowed for name '%s'.", name); |
9e2f7c11 | 285 | |
d383acad ZJS |
286 | /* Ensure that this unit either has no instance, or that the instance matches. */ |
287 | if (u->type != _UNIT_TYPE_INVALID && !streq_ptr(u->instance, instance)) | |
acd1987a | 288 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
4e494e6a | 289 | "Cannot add name %s, the instances don't match (\"%s\" != \"%s\").", |
ada4b34e | 290 | name, instance, u->instance); |
9e2f7c11 | 291 | |
4562c355 | 292 | if (u->id && !unit_type_may_alias(t)) |
ada4b34e | 293 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EEXIST), |
4e494e6a | 294 | "Cannot add name %s, aliases are not allowed for %s units.", |
ada4b34e | 295 | name, unit_type_to_string(t)); |
9e2f7c11 | 296 | |
598459ce | 297 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
4e494e6a | 298 | return log_unit_warning_errno(u, SYNTHETIC_ERRNO(E2BIG), "Cannot add name, manager has too many units."); |
4f0f902f | 299 | |
4562c355 ZJS |
300 | /* Add name to the global hashmap first, because that's easier to undo */ |
301 | r = hashmap_put(u->manager->units, name, u); | |
7410616c | 302 | if (r < 0) |
4e494e6a | 303 | return log_unit_debug_errno(u, r, "Add unit to hashmap failed for name '%s': %m", text); |
87f0e418 | 304 | |
4562c355 ZJS |
305 | if (u->id) { |
306 | r = unit_add_alias(u, name); /* unit_add_alias() takes ownership of the name on success */ | |
307 | if (r < 0) { | |
308 | hashmap_remove(u->manager->units, name); | |
309 | return r; | |
310 | } | |
311 | TAKE_PTR(name); | |
312 | ||
313 | } else { | |
314 | /* A new name, we don't need the set yet. */ | |
315 | assert(u->type == _UNIT_TYPE_INVALID); | |
316 | assert(!u->instance); | |
317 | ||
ac155bb8 | 318 | u->type = t; |
4562c355 ZJS |
319 | u->id = TAKE_PTR(name); |
320 | u->instance = TAKE_PTR(instance); | |
9e2f7c11 | 321 | |
71fda00f | 322 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
598459ce | 323 | unit_init(u); |
598459ce | 324 | } |
9e2f7c11 | 325 | |
598459ce LP |
326 | unit_add_to_dbus_queue(u); |
327 | return 0; | |
87f0e418 LP |
328 | } |
329 | ||
0ae97ec1 | 330 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 331 | _cleanup_free_ char *t = NULL; |
4562c355 | 332 | char *s; |
276c3e78 | 333 | int r; |
0ae97ec1 LP |
334 | |
335 | assert(u); | |
336 | assert(name); | |
337 | ||
7410616c | 338 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 339 | if (!u->instance) |
9e2f7c11 LP |
340 | return -EINVAL; |
341 | ||
7410616c LP |
342 | r = unit_name_replace_instance(name, u->instance, &t); |
343 | if (r < 0) | |
344 | return r; | |
9e2f7c11 LP |
345 | |
346 | name = t; | |
347 | } | |
348 | ||
4562c355 ZJS |
349 | if (streq_ptr(u->id, name)) |
350 | return 0; /* Nothing to do. */ | |
351 | ||
352 | /* Selects one of the aliases of this unit as the id */ | |
353 | s = set_get(u->aliases, (char*) name); | |
9e2f7c11 | 354 | if (!s) |
0ae97ec1 LP |
355 | return -ENOENT; |
356 | ||
4562c355 ZJS |
357 | if (u->id) { |
358 | r = set_remove_and_put(u->aliases, name, u->id); | |
359 | if (r < 0) | |
360 | return r; | |
361 | } else | |
362 | assert_se(set_remove(u->aliases, name)); /* see set_get() above… */ | |
276c3e78 | 363 | |
4562c355 | 364 | u->id = s; /* Old u->id is now stored in the set, and s is not stored anywhere */ |
c1e1601e | 365 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 366 | |
0ae97ec1 LP |
367 | return 0; |
368 | } | |
369 | ||
f50e0a01 | 370 | int unit_set_description(Unit *u, const char *description) { |
84b26d51 | 371 | int r; |
f50e0a01 LP |
372 | |
373 | assert(u); | |
374 | ||
84b26d51 LP |
375 | r = free_and_strdup(&u->description, empty_to_null(description)); |
376 | if (r < 0) | |
377 | return r; | |
378 | if (r > 0) | |
379 | unit_add_to_dbus_queue(u); | |
c1e1601e | 380 | |
f50e0a01 LP |
381 | return 0; |
382 | } | |
383 | ||
02de9614 ZJS |
384 | static bool unit_success_failure_handler_has_jobs(Unit *unit) { |
385 | Unit *other; | |
386 | ||
387 | UNIT_FOREACH_DEPENDENCY(other, unit, UNIT_ATOM_ON_SUCCESS) | |
388 | if (other->job || other->nop_job) | |
389 | return true; | |
390 | ||
391 | UNIT_FOREACH_DEPENDENCY(other, unit, UNIT_ATOM_ON_FAILURE) | |
392 | if (other->job || other->nop_job) | |
393 | return true; | |
394 | ||
395 | return false; | |
396 | } | |
397 | ||
6ac62d61 LP |
398 | void unit_release_resources(Unit *u) { |
399 | UnitActiveState state; | |
1ba84fef | 400 | ExecContext *ec; |
6ac62d61 LP |
401 | |
402 | assert(u); | |
403 | ||
404 | if (u->job || u->nop_job) | |
405 | return; | |
406 | ||
407 | if (u->perpetual) | |
408 | return; | |
409 | ||
410 | state = unit_active_state(u); | |
411 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
412 | return; | |
413 | ||
414 | if (unit_will_restart(u)) | |
415 | return; | |
416 | ||
1ba84fef LP |
417 | ec = unit_get_exec_context(u); |
418 | if (ec && ec->runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART) | |
419 | exec_context_destroy_runtime_directory(ec, u->manager->prefix[EXEC_DIRECTORY_RUNTIME]); | |
420 | ||
6ac62d61 LP |
421 | if (UNIT_VTABLE(u)->release_resources) |
422 | UNIT_VTABLE(u)->release_resources(u); | |
423 | } | |
424 | ||
f2f725e5 | 425 | bool unit_may_gc(Unit *u) { |
a354329f | 426 | UnitActiveState state; |
e98b2fbb | 427 | int r; |
5afe510c | 428 | |
701cc384 LP |
429 | assert(u); |
430 | ||
6ac62d61 LP |
431 | /* Checks whether the unit is ready to be unloaded for garbage collection. Returns true when the |
432 | * unit may be collected, and false if there's some reason to keep it loaded. | |
2641f02e | 433 | * |
6ac62d61 LP |
434 | * References from other units are *not* checked here. Instead, this is done in unit_gc_sweep(), but |
435 | * using markers to properly collect dependency loops. | |
2641f02e | 436 | */ |
5afe510c | 437 | |
02de9614 | 438 | if (u->job || u->nop_job) |
f2f725e5 | 439 | return false; |
6c073082 | 440 | |
f5869324 | 441 | if (u->perpetual) |
f2f725e5 | 442 | return false; |
9d576438 | 443 | |
935f8042 LP |
444 | /* if we saw a cgroup empty event for this unit, stay around until we processed it so that we remove |
445 | * the empty cgroup if possible. Similar, process any pending OOM events if they are already queued | |
446 | * before we release the unit. */ | |
447 | if (u->in_cgroup_empty_queue || u->in_cgroup_oom_queue) | |
8db99898 RP |
448 | return false; |
449 | ||
af05bb97 LP |
450 | /* Make sure to send out D-Bus events before we unload the unit */ |
451 | if (u->in_dbus_queue) | |
452 | return false; | |
453 | ||
05a98afd | 454 | if (sd_bus_track_count(u->bus_track) > 0) |
f2f725e5 | 455 | return false; |
05a98afd | 456 | |
6ac62d61 LP |
457 | state = unit_active_state(u); |
458 | ||
459 | /* But we keep the unit object around for longer when it is referenced or configured to not be | |
460 | * gc'ed */ | |
5afe510c LP |
461 | switch (u->collect_mode) { |
462 | ||
463 | case COLLECT_INACTIVE: | |
464 | if (state != UNIT_INACTIVE) | |
f2f725e5 | 465 | return false; |
5afe510c LP |
466 | |
467 | break; | |
468 | ||
469 | case COLLECT_INACTIVE_OR_FAILED: | |
fcd7aef7 | 470 | if (!UNIT_IS_INACTIVE_OR_FAILED(state)) |
f2f725e5 | 471 | return false; |
5afe510c LP |
472 | |
473 | break; | |
474 | ||
475 | default: | |
04499a70 | 476 | assert_not_reached(); |
5afe510c LP |
477 | } |
478 | ||
02de9614 ZJS |
479 | /* Check if any OnFailure= or on Success= jobs may be pending */ |
480 | if (unit_success_failure_handler_has_jobs(u)) | |
481 | return false; | |
482 | ||
9cc54544 LP |
483 | /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay |
484 | * around. Units with active processes should never be collected. */ | |
485 | r = unit_cgroup_is_empty(u); | |
486 | if (r <= 0 && r != -ENXIO) | |
487 | return false; /* ENXIO means: currently not realized */ | |
e98b2fbb | 488 | |
6ac62d61 LP |
489 | if (!UNIT_VTABLE(u)->may_gc) |
490 | return true; | |
701cc384 | 491 | |
6ac62d61 | 492 | return UNIT_VTABLE(u)->may_gc(u); |
701cc384 LP |
493 | } |
494 | ||
87f0e418 LP |
495 | void unit_add_to_load_queue(Unit *u) { |
496 | assert(u); | |
ac155bb8 | 497 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 498 | |
ac155bb8 | 499 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
500 | return; |
501 | ||
71fda00f | 502 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 503 | u->in_load_queue = true; |
87f0e418 LP |
504 | } |
505 | ||
23a177ef LP |
506 | void unit_add_to_cleanup_queue(Unit *u) { |
507 | assert(u); | |
508 | ||
ac155bb8 | 509 | if (u->in_cleanup_queue) |
23a177ef LP |
510 | return; |
511 | ||
71fda00f | 512 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 513 | u->in_cleanup_queue = true; |
23a177ef LP |
514 | } |
515 | ||
701cc384 LP |
516 | void unit_add_to_gc_queue(Unit *u) { |
517 | assert(u); | |
518 | ||
ac155bb8 | 519 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
520 | return; |
521 | ||
f2f725e5 | 522 | if (!unit_may_gc(u)) |
701cc384 LP |
523 | return; |
524 | ||
c5a97ed1 | 525 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 526 | u->in_gc_queue = true; |
701cc384 LP |
527 | } |
528 | ||
c1e1601e LP |
529 | void unit_add_to_dbus_queue(Unit *u) { |
530 | assert(u); | |
ac155bb8 | 531 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 532 | |
ac155bb8 | 533 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
534 | return; |
535 | ||
a567261a | 536 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 537 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 538 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 539 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 540 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
541 | return; |
542 | } | |
543 | ||
71fda00f | 544 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 545 | u->in_dbus_queue = true; |
c1e1601e LP |
546 | } |
547 | ||
fda09318 | 548 | void unit_submit_to_stop_when_unneeded_queue(Unit *u) { |
a3c1168a LP |
549 | assert(u); |
550 | ||
551 | if (u->in_stop_when_unneeded_queue) | |
552 | return; | |
553 | ||
554 | if (!u->stop_when_unneeded) | |
555 | return; | |
556 | ||
557 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
558 | return; | |
559 | ||
560 | LIST_PREPEND(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
561 | u->in_stop_when_unneeded_queue = true; | |
562 | } | |
563 | ||
0bc488c9 LP |
564 | void unit_submit_to_start_when_upheld_queue(Unit *u) { |
565 | assert(u); | |
566 | ||
567 | if (u->in_start_when_upheld_queue) | |
568 | return; | |
569 | ||
570 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u))) | |
571 | return; | |
572 | ||
573 | if (!unit_has_dependency(u, UNIT_ATOM_START_STEADILY, NULL)) | |
574 | return; | |
575 | ||
576 | LIST_PREPEND(start_when_upheld_queue, u->manager->start_when_upheld_queue, u); | |
577 | u->in_start_when_upheld_queue = true; | |
578 | } | |
579 | ||
56c59592 LP |
580 | void unit_submit_to_stop_when_bound_queue(Unit *u) { |
581 | assert(u); | |
582 | ||
583 | if (u->in_stop_when_bound_queue) | |
584 | return; | |
585 | ||
586 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
587 | return; | |
588 | ||
589 | if (!unit_has_dependency(u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT, NULL)) | |
590 | return; | |
591 | ||
592 | LIST_PREPEND(stop_when_bound_queue, u->manager->stop_when_bound_queue, u); | |
593 | u->in_stop_when_bound_queue = true; | |
594 | } | |
595 | ||
1ba84fef LP |
596 | static bool unit_can_release_resources(Unit *u) { |
597 | ExecContext *ec; | |
598 | ||
599 | assert(u); | |
600 | ||
601 | if (UNIT_VTABLE(u)->release_resources) | |
602 | return true; | |
603 | ||
604 | ec = unit_get_exec_context(u); | |
605 | if (ec && ec->runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART) | |
606 | return true; | |
607 | ||
608 | return false; | |
609 | } | |
610 | ||
6ac62d61 LP |
611 | void unit_submit_to_release_resources_queue(Unit *u) { |
612 | assert(u); | |
613 | ||
614 | if (u->in_release_resources_queue) | |
615 | return; | |
616 | ||
617 | if (u->job || u->nop_job) | |
618 | return; | |
619 | ||
620 | if (u->perpetual) | |
621 | return; | |
622 | ||
1ba84fef | 623 | if (!unit_can_release_resources(u)) |
6ac62d61 LP |
624 | return; |
625 | ||
626 | LIST_PREPEND(release_resources_queue, u->manager->release_resources_queue, u); | |
627 | u->in_release_resources_queue = true; | |
628 | } | |
629 | ||
15ed3c3a | 630 | static void unit_clear_dependencies(Unit *u) { |
87f0e418 LP |
631 | assert(u); |
632 | ||
15ed3c3a LP |
633 | /* Removes all dependencies configured on u and their reverse dependencies. */ |
634 | ||
635 | for (Hashmap *deps; (deps = hashmap_steal_first(u->dependencies));) { | |
87f0e418 | 636 | |
15ed3c3a LP |
637 | for (Unit *other; (other = hashmap_steal_first_key(deps));) { |
638 | Hashmap *other_deps; | |
701cc384 | 639 | |
15ed3c3a LP |
640 | HASHMAP_FOREACH(other_deps, other->dependencies) |
641 | hashmap_remove(other_deps, u); | |
642 | ||
643 | unit_add_to_gc_queue(other); | |
644 | } | |
645 | ||
646 | hashmap_free(deps); | |
87f0e418 LP |
647 | } |
648 | ||
15ed3c3a | 649 | u->dependencies = hashmap_free(u->dependencies); |
87f0e418 LP |
650 | } |
651 | ||
c2756a68 | 652 | static void unit_remove_transient(Unit *u) { |
c2756a68 LP |
653 | assert(u); |
654 | ||
655 | if (!u->transient) | |
656 | return; | |
657 | ||
658 | if (u->fragment_path) | |
3f5e8115 | 659 | (void) unlink(u->fragment_path); |
c2756a68 LP |
660 | |
661 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 662 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 663 | |
45519d13 | 664 | if (path_extract_directory(*i, &p) < 0) /* Get the drop-in directory from the drop-in file */ |
39591351 LP |
665 | continue; |
666 | ||
45519d13 | 667 | if (path_extract_directory(p, &pp) < 0) /* Get the config directory from the drop-in directory */ |
39591351 LP |
668 | continue; |
669 | ||
670 | /* Only drop transient drop-ins */ | |
671 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
672 | continue; | |
c2756a68 | 673 | |
39591351 LP |
674 | (void) unlink(*i); |
675 | (void) rmdir(p); | |
c2756a68 LP |
676 | } |
677 | } | |
678 | ||
9e615fa3 | 679 | static void unit_free_mounts_for(Unit *u) { |
eef85c4a | 680 | assert(u); |
a57f7e2c | 681 | |
9e615fa3 LB |
682 | for (UnitMountDependencyType t = 0; t < _UNIT_MOUNT_DEPENDENCY_TYPE_MAX; ++t) { |
683 | for (;;) { | |
684 | _cleanup_free_ char *path = NULL; | |
685 | ||
686 | path = hashmap_steal_first_key(u->mounts_for[t]); | |
687 | if (!path) | |
688 | break; | |
a57f7e2c | 689 | |
eef85c4a | 690 | char s[strlen(path) + 1]; |
a57f7e2c | 691 | |
eef85c4a LP |
692 | PATH_FOREACH_PREFIX_MORE(s, path) { |
693 | char *y; | |
694 | Set *x; | |
695 | ||
9e615fa3 | 696 | x = hashmap_get2(u->manager->units_needing_mounts_for[t], s, (void**) &y); |
eef85c4a LP |
697 | if (!x) |
698 | continue; | |
a57f7e2c | 699 | |
eef85c4a | 700 | (void) set_remove(x, u); |
a57f7e2c | 701 | |
eef85c4a | 702 | if (set_isempty(x)) { |
9e615fa3 | 703 | assert_se(hashmap_remove(u->manager->units_needing_mounts_for[t], y)); |
eef85c4a LP |
704 | free(y); |
705 | set_free(x); | |
706 | } | |
a57f7e2c LP |
707 | } |
708 | } | |
a57f7e2c | 709 | |
9e615fa3 LB |
710 | u->mounts_for[t] = hashmap_free(u->mounts_for[t]); |
711 | } | |
a57f7e2c LP |
712 | } |
713 | ||
598459ce LP |
714 | static void unit_done(Unit *u) { |
715 | ExecContext *ec; | |
716 | CGroupContext *cc; | |
717 | ||
718 | assert(u); | |
719 | ||
720 | if (u->type < 0) | |
721 | return; | |
722 | ||
723 | if (UNIT_VTABLE(u)->done) | |
724 | UNIT_VTABLE(u)->done(u); | |
725 | ||
726 | ec = unit_get_exec_context(u); | |
727 | if (ec) | |
728 | exec_context_done(ec); | |
729 | ||
730 | cc = unit_get_cgroup_context(u); | |
731 | if (cc) | |
732 | cgroup_context_done(cc); | |
733 | } | |
734 | ||
75db809a | 735 | Unit* unit_free(Unit *u) { |
12f64221 | 736 | Unit *slice; |
87f0e418 LP |
737 | char *t; |
738 | ||
c9d5c9c0 | 739 | if (!u) |
75db809a | 740 | return NULL; |
87f0e418 | 741 | |
7223d500 LB |
742 | sd_event_source_disable_unref(u->auto_start_stop_event_source); |
743 | ||
50fb00b7 | 744 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 745 | |
2c289ea8 | 746 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
747 | unit_remove_transient(u); |
748 | ||
c1e1601e LP |
749 | bus_unit_send_removed_signal(u); |
750 | ||
598459ce | 751 | unit_done(u); |
a013b84b | 752 | |
50be4f4a | 753 | unit_dequeue_rewatch_pids(u); |
cf9fd508 | 754 | |
73458283 YW |
755 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
756 | u->bus_track = sd_bus_track_unref(u->bus_track); | |
05a98afd | 757 | u->deserialized_refs = strv_free(u->deserialized_refs); |
af1e3365 | 758 | u->pending_freezer_invocation = sd_bus_message_unref(u->pending_freezer_invocation); |
05a98afd | 759 | |
9e615fa3 | 760 | unit_free_mounts_for(u); |
a57f7e2c | 761 | |
90e74a66 | 762 | SET_FOREACH(t, u->aliases) |
ac155bb8 | 763 | hashmap_remove_value(u->manager->units, t, u); |
4562c355 ZJS |
764 | if (u->id) |
765 | hashmap_remove_value(u->manager->units, u->id, u); | |
87f0e418 | 766 | |
4b58153d LP |
767 | if (!sd_id128_is_null(u->invocation_id)) |
768 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
769 | ||
97e7d748 MS |
770 | if (u->job) { |
771 | Job *j = u->job; | |
772 | job_uninstall(j); | |
773 | job_free(j); | |
774 | } | |
964e0949 | 775 | |
e0209d83 MS |
776 | if (u->nop_job) { |
777 | Job *j = u->nop_job; | |
778 | job_uninstall(j); | |
779 | job_free(j); | |
780 | } | |
781 | ||
4c591f39 MK |
782 | /* A unit is being dropped from the tree, make sure our family is realized properly. Do this after we |
783 | * detach the unit from slice tree in order to eliminate its effect on controller masks. */ | |
12f64221 | 784 | slice = UNIT_GET_SLICE(u); |
d219a2b0 | 785 | unit_clear_dependencies(u); |
12f64221 LP |
786 | if (slice) |
787 | unit_add_family_to_cgroup_realize_queue(slice); | |
fb46fca7 | 788 | |
adefcf28 LP |
789 | if (u->on_console) |
790 | manager_unref_console(u->manager); | |
791 | ||
efdb0237 | 792 | unit_release_cgroup(u); |
72673e86 | 793 | |
d3070fbd LP |
794 | if (!MANAGER_IS_RELOADING(u->manager)) |
795 | unit_unlink_state_files(u); | |
796 | ||
00d9ef85 LP |
797 | unit_unref_uid_gid(u, false); |
798 | ||
5269eb6b | 799 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 800 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 801 | |
a911bb9a LP |
802 | unit_unwatch_all_pids(u); |
803 | ||
7f7d01ed ZJS |
804 | while (u->refs_by_target) |
805 | unit_ref_unset(u->refs_by_target); | |
57020a3a | 806 | |
ac155bb8 | 807 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 808 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 809 | |
ac155bb8 | 810 | if (u->in_load_queue) |
71fda00f | 811 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 812 | |
ac155bb8 | 813 | if (u->in_dbus_queue) |
71fda00f | 814 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 815 | |
13e72103 MK |
816 | if (u->in_cleanup_queue) |
817 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
818 | ||
a2d72e26 | 819 | if (u->in_gc_queue) |
c5a97ed1 | 820 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 821 | |
91a6073e LP |
822 | if (u->in_cgroup_realize_queue) |
823 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 824 | |
09e24654 LP |
825 | if (u->in_cgroup_empty_queue) |
826 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
827 | ||
13e72103 MK |
828 | if (u->in_cgroup_oom_queue) |
829 | LIST_REMOVE(cgroup_oom_queue, u->manager->cgroup_oom_queue, u); | |
adefcf28 | 830 | |
19496554 MS |
831 | if (u->in_target_deps_queue) |
832 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
833 | ||
a3c1168a LP |
834 | if (u->in_stop_when_unneeded_queue) |
835 | LIST_REMOVE(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
836 | ||
0bc488c9 LP |
837 | if (u->in_start_when_upheld_queue) |
838 | LIST_REMOVE(start_when_upheld_queue, u->manager->start_when_upheld_queue, u); | |
839 | ||
56c59592 LP |
840 | if (u->in_stop_when_bound_queue) |
841 | LIST_REMOVE(stop_when_bound_queue, u->manager->stop_when_bound_queue, u); | |
842 | ||
6ac62d61 LP |
843 | if (u->in_release_resources_queue) |
844 | LIST_REMOVE(release_resources_queue, u->manager->release_resources_queue, u); | |
845 | ||
0fd9c28c | 846 | bpf_firewall_close(u); |
fab34748 | 847 | |
a946fa9b ZJS |
848 | condition_free_list(u->conditions); |
849 | condition_free_list(u->asserts); | |
f755e3b7 | 850 | |
ac155bb8 | 851 | free(u->description); |
49dbfa7b | 852 | strv_free(u->documentation); |
ac155bb8 | 853 | free(u->fragment_path); |
1b64d026 | 854 | free(u->source_path); |
ae7a7182 | 855 | strv_free(u->dropin_paths); |
ac155bb8 | 856 | free(u->instance); |
87f0e418 | 857 | |
f189ab18 | 858 | free(u->job_timeout_reboot_arg); |
6bf0f408 LP |
859 | free(u->reboot_arg); |
860 | ||
23e9a7dd LP |
861 | free(u->access_selinux_context); |
862 | ||
4562c355 ZJS |
863 | set_free_free(u->aliases); |
864 | free(u->id); | |
865 | ||
48b92b37 LB |
866 | activation_details_unref(u->activation_details); |
867 | ||
75db809a | 868 | return mfree(u); |
87f0e418 LP |
869 | } |
870 | ||
d9e45bc3 MS |
871 | FreezerState unit_freezer_state(Unit *u) { |
872 | assert(u); | |
873 | ||
874 | return u->freezer_state; | |
875 | } | |
876 | ||
87f0e418 LP |
877 | UnitActiveState unit_active_state(Unit *u) { |
878 | assert(u); | |
879 | ||
ac155bb8 | 880 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
881 | return unit_active_state(unit_follow_merge(u)); |
882 | ||
883 | /* After a reload it might happen that a unit is not correctly | |
884 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 885 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
886 | |
887 | return UNIT_VTABLE(u)->active_state(u); | |
888 | } | |
889 | ||
10a94420 LP |
890 | const char* unit_sub_state_to_string(Unit *u) { |
891 | assert(u); | |
892 | ||
893 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
894 | } | |
895 | ||
15ed3c3a | 896 | static int unit_merge_names(Unit *u, Unit *other) { |
4562c355 | 897 | char *name; |
7c0b05e5 | 898 | int r; |
87f0e418 | 899 | |
23a177ef LP |
900 | assert(u); |
901 | assert(other); | |
902 | ||
4562c355 | 903 | r = unit_add_alias(u, other->id); |
7c0b05e5 MS |
904 | if (r < 0) |
905 | return r; | |
23a177ef | 906 | |
4562c355 ZJS |
907 | r = set_move(u->aliases, other->aliases); |
908 | if (r < 0) { | |
909 | set_remove(u->aliases, other->id); | |
910 | return r; | |
911 | } | |
23a177ef | 912 | |
4562c355 ZJS |
913 | TAKE_PTR(other->id); |
914 | other->aliases = set_free_free(other->aliases); | |
23a177ef | 915 | |
90e74a66 | 916 | SET_FOREACH(name, u->aliases) |
4562c355 | 917 | assert_se(hashmap_replace(u->manager->units, name, u) == 0); |
7c0b05e5 MS |
918 | |
919 | return 0; | |
87f0e418 LP |
920 | } |
921 | ||
15ed3c3a LP |
922 | static int unit_reserve_dependencies(Unit *u, Unit *other) { |
923 | size_t n_reserve; | |
924 | Hashmap* deps; | |
925 | void *d; | |
926 | int r; | |
09a65f92 MS |
927 | |
928 | assert(u); | |
929 | assert(other); | |
09a65f92 | 930 | |
15ed3c3a LP |
931 | /* Let's reserve some space in the dependency hashmaps so that later on merging the units cannot |
932 | * fail. | |
933 | * | |
18fe76eb | 934 | * First make some room in the per dependency type hashmaps. Using the summed size of both units' |
15ed3c3a LP |
935 | * hashmaps is an estimate that is likely too high since they probably use some of the same |
936 | * types. But it's never too low, and that's all we need. */ | |
937 | ||
938 | n_reserve = MIN(hashmap_size(other->dependencies), LESS_BY((size_t) _UNIT_DEPENDENCY_MAX, hashmap_size(u->dependencies))); | |
939 | if (n_reserve > 0) { | |
940 | r = hashmap_ensure_allocated(&u->dependencies, NULL); | |
941 | if (r < 0) | |
942 | return r; | |
943 | ||
944 | r = hashmap_reserve(u->dependencies, n_reserve); | |
945 | if (r < 0) | |
946 | return r; | |
947 | } | |
948 | ||
949 | /* Now, enlarge our per dependency type hashmaps by the number of entries in the same hashmap of the | |
950 | * other unit's dependencies. | |
951 | * | |
952 | * NB: If u does not have a dependency set allocated for some dependency type, there is no need to | |
953 | * reserve anything for. In that case other's set will be transferred as a whole to u by | |
954 | * complete_move(). */ | |
955 | ||
956 | HASHMAP_FOREACH_KEY(deps, d, u->dependencies) { | |
957 | Hashmap *other_deps; | |
958 | ||
959 | other_deps = hashmap_get(other->dependencies, d); | |
960 | ||
961 | r = hashmap_reserve(deps, hashmap_size(other_deps)); | |
962 | if (r < 0) | |
963 | return r; | |
964 | } | |
965 | ||
966 | return 0; | |
967 | } | |
968 | ||
ed991163 | 969 | static bool unit_should_warn_about_dependency(UnitDependency dependency) { |
15ed3c3a | 970 | /* Only warn about some unit types */ |
ed991163 YW |
971 | return IN_SET(dependency, |
972 | UNIT_CONFLICTS, | |
973 | UNIT_CONFLICTED_BY, | |
974 | UNIT_BEFORE, | |
975 | UNIT_AFTER, | |
976 | UNIT_ON_SUCCESS, | |
977 | UNIT_ON_FAILURE, | |
978 | UNIT_TRIGGERS, | |
979 | UNIT_TRIGGERED_BY); | |
15ed3c3a LP |
980 | } |
981 | ||
982 | static int unit_per_dependency_type_hashmap_update( | |
983 | Hashmap *per_type, | |
984 | Unit *other, | |
985 | UnitDependencyMask origin_mask, | |
986 | UnitDependencyMask destination_mask) { | |
987 | ||
988 | UnitDependencyInfo info; | |
989 | int r; | |
990 | ||
991 | assert(other); | |
992 | assert_cc(sizeof(void*) == sizeof(info)); | |
993 | ||
994 | /* Acquire the UnitDependencyInfo entry for the Unit* we are interested in, and update it if it | |
995 | * exists, or insert it anew if not. */ | |
09a65f92 | 996 | |
15ed3c3a LP |
997 | info.data = hashmap_get(per_type, other); |
998 | if (info.data) { | |
999 | /* Entry already exists. Add in our mask. */ | |
1000 | ||
1001 | if (FLAGS_SET(origin_mask, info.origin_mask) && | |
1002 | FLAGS_SET(destination_mask, info.destination_mask)) | |
1003 | return 0; /* NOP */ | |
1004 | ||
1005 | info.origin_mask |= origin_mask; | |
1006 | info.destination_mask |= destination_mask; | |
1007 | ||
1008 | r = hashmap_update(per_type, other, info.data); | |
1009 | } else { | |
1010 | info = (UnitDependencyInfo) { | |
1011 | .origin_mask = origin_mask, | |
1012 | .destination_mask = destination_mask, | |
1013 | }; | |
09a65f92 | 1014 | |
15ed3c3a LP |
1015 | r = hashmap_put(per_type, other, info.data); |
1016 | } | |
1017 | if (r < 0) | |
1018 | return r; | |
1019 | ||
15ed3c3a | 1020 | return 1; |
09a65f92 MS |
1021 | } |
1022 | ||
c8b3b524 YW |
1023 | static void unit_merge_dependencies(Unit *u, Unit *other) { |
1024 | Hashmap *deps; | |
1025 | void *dt; /* Actually of type UnitDependency, except that we don't bother casting it here, | |
1026 | * since the hashmaps all want it as void pointer. */ | |
eef85c4a | 1027 | |
23a177ef LP |
1028 | assert(u); |
1029 | assert(other); | |
23a177ef | 1030 | |
15ed3c3a LP |
1031 | if (u == other) |
1032 | return; | |
1033 | ||
c8b3b524 YW |
1034 | /* First, remove dependency to other. */ |
1035 | HASHMAP_FOREACH_KEY(deps, dt, u->dependencies) { | |
ed991163 YW |
1036 | if (hashmap_remove(deps, other) && unit_should_warn_about_dependency(UNIT_DEPENDENCY_FROM_PTR(dt))) |
1037 | log_unit_warning(u, "Dependency %s=%s is dropped, as %s is merged into %s.", | |
1038 | unit_dependency_to_string(UNIT_DEPENDENCY_FROM_PTR(dt)), | |
1039 | other->id, other->id, u->id); | |
c8b3b524 YW |
1040 | |
1041 | if (hashmap_isempty(deps)) | |
1042 | hashmap_free(hashmap_remove(u->dependencies, dt)); | |
1043 | } | |
1044 | ||
15ed3c3a | 1045 | for (;;) { |
5d2a48da | 1046 | _cleanup_hashmap_free_ Hashmap *other_deps = NULL; |
15ed3c3a LP |
1047 | UnitDependencyInfo di_back; |
1048 | Unit *back; | |
15ed3c3a LP |
1049 | |
1050 | /* Let's focus on one dependency type at a time, that 'other' has defined. */ | |
1051 | other_deps = hashmap_steal_first_key_and_value(other->dependencies, &dt); | |
1052 | if (!other_deps) | |
1053 | break; /* done! */ | |
1054 | ||
4b7918a6 YW |
1055 | deps = hashmap_get(u->dependencies, dt); |
1056 | ||
15ed3c3a LP |
1057 | /* Now iterate through all dependencies of this dependency type, of 'other'. We refer to the |
1058 | * referenced units as 'back'. */ | |
1059 | HASHMAP_FOREACH_KEY(di_back.data, back, other_deps) { | |
1060 | Hashmap *back_deps; | |
1061 | void *back_dt; | |
eef85c4a | 1062 | |
e66047ff | 1063 | if (back == u) { |
15ed3c3a LP |
1064 | /* This is a dependency pointing back to the unit we want to merge with? |
1065 | * Suppress it (but warn) */ | |
ed991163 YW |
1066 | if (unit_should_warn_about_dependency(UNIT_DEPENDENCY_FROM_PTR(dt))) |
1067 | log_unit_warning(u, "Dependency %s=%s in %s is dropped, as %s is merged into %s.", | |
1068 | unit_dependency_to_string(UNIT_DEPENDENCY_FROM_PTR(dt)), | |
1069 | u->id, other->id, other->id, u->id); | |
1070 | ||
4b7918a6 | 1071 | hashmap_remove(other_deps, back); |
15ed3c3a LP |
1072 | continue; |
1073 | } | |
eef85c4a | 1074 | |
15ed3c3a LP |
1075 | /* Now iterate through all deps of 'back', and fix the ones pointing to 'other' to |
1076 | * point to 'u' instead. */ | |
1077 | HASHMAP_FOREACH_KEY(back_deps, back_dt, back->dependencies) { | |
1078 | UnitDependencyInfo di_move; | |
eef85c4a | 1079 | |
15ed3c3a LP |
1080 | di_move.data = hashmap_remove(back_deps, other); |
1081 | if (!di_move.data) | |
1082 | continue; | |
eef85c4a | 1083 | |
15ed3c3a LP |
1084 | assert_se(unit_per_dependency_type_hashmap_update( |
1085 | back_deps, | |
1086 | u, | |
1087 | di_move.origin_mask, | |
1088 | di_move.destination_mask) >= 0); | |
1089 | } | |
eef85c4a | 1090 | |
15ed3c3a | 1091 | /* The target unit already has dependencies of this type, let's then merge this individually. */ |
4b7918a6 YW |
1092 | if (deps) |
1093 | assert_se(unit_per_dependency_type_hashmap_update( | |
1094 | deps, | |
1095 | back, | |
1096 | di_back.origin_mask, | |
1097 | di_back.destination_mask) >= 0); | |
15ed3c3a | 1098 | } |
4b7918a6 YW |
1099 | |
1100 | /* Now all references towards 'other' of the current type 'dt' are corrected to point to 'u'. | |
1101 | * Lets's now move the deps of type 'dt' from 'other' to 'u'. If the unit does not have | |
1102 | * dependencies of this type, let's move them per type wholesale. */ | |
1103 | if (!deps) | |
1104 | assert_se(hashmap_put(u->dependencies, dt, TAKE_PTR(other_deps)) >= 0); | |
15ed3c3a | 1105 | } |
23a177ef | 1106 | |
15ed3c3a | 1107 | other->dependencies = hashmap_free(other->dependencies); |
23a177ef LP |
1108 | } |
1109 | ||
1110 | int unit_merge(Unit *u, Unit *other) { | |
09a65f92 | 1111 | int r; |
87f0e418 LP |
1112 | |
1113 | assert(u); | |
1114 | assert(other); | |
ac155bb8 MS |
1115 | assert(u->manager == other->manager); |
1116 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 1117 | |
cc916967 LP |
1118 | other = unit_follow_merge(other); |
1119 | ||
23a177ef LP |
1120 | if (other == u) |
1121 | return 0; | |
1122 | ||
ac155bb8 | 1123 | if (u->type != other->type) |
9e2f7c11 LP |
1124 | return -EINVAL; |
1125 | ||
8a993b61 | 1126 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
1127 | return -EEXIST; |
1128 | ||
ec2ce0c5 | 1129 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 1130 | return -EEXIST; |
87f0e418 | 1131 | |
d383acad ZJS |
1132 | if (!streq_ptr(u->instance, other->instance)) |
1133 | return -EINVAL; | |
1134 | ||
ac155bb8 | 1135 | if (other->job) |
819e213f LP |
1136 | return -EEXIST; |
1137 | ||
e0209d83 MS |
1138 | if (other->nop_job) |
1139 | return -EEXIST; | |
1140 | ||
fdf20a31 | 1141 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
1142 | return -EEXIST; |
1143 | ||
15ed3c3a LP |
1144 | /* Make reservations to ensure merge_dependencies() won't fail. We don't rollback reservations if we |
1145 | * fail. We don't have a way to undo reservations. A reservation is not a leak. */ | |
1146 | r = unit_reserve_dependencies(u, other); | |
1147 | if (r < 0) | |
1148 | return r; | |
09a65f92 | 1149 | |
57020a3a | 1150 | /* Redirect all references */ |
7f7d01ed ZJS |
1151 | while (other->refs_by_target) |
1152 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
57020a3a | 1153 | |
87f0e418 | 1154 | /* Merge dependencies */ |
15ed3c3a | 1155 | unit_merge_dependencies(u, other); |
87f0e418 | 1156 | |
1d0c81a0 YW |
1157 | /* Merge names. It is better to do that after merging deps, otherwise the log message contains n/a. */ |
1158 | r = unit_merge_names(u, other); | |
1159 | if (r < 0) | |
1160 | return r; | |
1161 | ||
ac155bb8 MS |
1162 | other->load_state = UNIT_MERGED; |
1163 | other->merged_into = u; | |
23a177ef | 1164 | |
48b92b37 LB |
1165 | if (!u->activation_details) |
1166 | u->activation_details = activation_details_ref(other->activation_details); | |
1167 | ||
3616a49c LP |
1168 | /* If there is still some data attached to the other node, we |
1169 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 1170 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
1171 | if (UNIT_VTABLE(other)->done) |
1172 | UNIT_VTABLE(other)->done(other); | |
1173 | ||
1174 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
1175 | unit_add_to_cleanup_queue(other); |
1176 | ||
1177 | return 0; | |
1178 | } | |
1179 | ||
1180 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 1181 | _cleanup_free_ char *s = NULL; |
23a177ef | 1182 | Unit *other; |
9e2f7c11 | 1183 | int r; |
23a177ef | 1184 | |
e8630e69 ZJS |
1185 | /* Either add name to u, or if a unit with name already exists, merge it with u. |
1186 | * If name is a template, do the same for name@instance, where instance is u's instance. */ | |
1187 | ||
23a177ef LP |
1188 | assert(u); |
1189 | assert(name); | |
1190 | ||
7410616c | 1191 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 1192 | if (!u->instance) |
9e2f7c11 LP |
1193 | return -EINVAL; |
1194 | ||
7410616c LP |
1195 | r = unit_name_replace_instance(name, u->instance, &s); |
1196 | if (r < 0) | |
1197 | return r; | |
9e2f7c11 LP |
1198 | |
1199 | name = s; | |
1200 | } | |
1201 | ||
c2756a68 | 1202 | other = manager_get_unit(u->manager, name); |
7410616c LP |
1203 | if (other) |
1204 | return unit_merge(u, other); | |
23a177ef | 1205 | |
7410616c | 1206 | return unit_add_name(u, name); |
23a177ef LP |
1207 | } |
1208 | ||
1209 | Unit* unit_follow_merge(Unit *u) { | |
1210 | assert(u); | |
1211 | ||
ac155bb8 MS |
1212 | while (u->load_state == UNIT_MERGED) |
1213 | assert_se(u = u->merged_into); | |
23a177ef LP |
1214 | |
1215 | return u; | |
1216 | } | |
1217 | ||
1218 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
1219 | int r; | |
1220 | ||
1221 | assert(u); | |
1222 | assert(c); | |
1223 | ||
a8c5a4c6 YW |
1224 | /* Unlike unit_add_dependency() or friends, this always returns 0 on success. */ |
1225 | ||
61aa5f70 LB |
1226 | if (c->working_directory) { |
1227 | r = unit_add_mounts_for( | |
1228 | u, | |
1229 | c->working_directory, | |
1230 | UNIT_DEPENDENCY_FILE, | |
1231 | c->working_directory_missing_ok ? UNIT_MOUNT_WANTS : UNIT_MOUNT_REQUIRES); | |
36be24c8 ZJS |
1232 | if (r < 0) |
1233 | return r; | |
1234 | } | |
1235 | ||
1236 | if (c->root_directory) { | |
ebc75103 | 1237 | r = unit_add_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE, UNIT_MOUNT_WANTS); |
36be24c8 ZJS |
1238 | if (r < 0) |
1239 | return r; | |
1240 | } | |
1241 | ||
915e6d16 | 1242 | if (c->root_image) { |
ebc75103 | 1243 | r = unit_add_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE, UNIT_MOUNT_WANTS); |
915e6d16 LP |
1244 | if (r < 0) |
1245 | return r; | |
1246 | } | |
1247 | ||
12375b95 | 1248 | for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
1249 | if (!u->manager->prefix[dt]) |
1250 | continue; | |
1251 | ||
5e702203 | 1252 | FOREACH_ARRAY(i, c->directories[dt].items, c->directories[dt].n_items) { |
c2b2df60 | 1253 | _cleanup_free_ char *p = NULL; |
ada5e276 | 1254 | |
5e702203 | 1255 | p = path_join(u->manager->prefix[dt], i->path); |
ada5e276 YW |
1256 | if (!p) |
1257 | return -ENOMEM; | |
1258 | ||
9e615fa3 | 1259 | r = unit_add_mounts_for(u, p, UNIT_DEPENDENCY_FILE, UNIT_MOUNT_REQUIRES); |
ada5e276 YW |
1260 | if (r < 0) |
1261 | return r; | |
1262 | } | |
1263 | } | |
1264 | ||
463d0d15 | 1265 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
1266 | return 0; |
1267 | ||
f3b7a79b LP |
1268 | /* For the following three directory types we need write access, and /var/ is possibly on the root |
1269 | * fs. Hence order after systemd-remount-fs.service, to ensure things are writable. */ | |
211a3d87 LB |
1270 | if (c->directories[EXEC_DIRECTORY_STATE].n_items > 0 || |
1271 | c->directories[EXEC_DIRECTORY_CACHE].n_items > 0 || | |
1272 | c->directories[EXEC_DIRECTORY_LOGS].n_items > 0) { | |
f3b7a79b LP |
1273 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, true, UNIT_DEPENDENCY_FILE); |
1274 | if (r < 0) | |
1275 | return r; | |
1276 | } | |
1277 | ||
b46a529c | 1278 | if (c->private_tmp) { |
46d45f90 | 1279 | r = unit_add_mounts_for(u, "/tmp", UNIT_DEPENDENCY_FILE, UNIT_MOUNT_WANTS); |
b2c7d1bb FB |
1280 | if (r < 0) |
1281 | return r; | |
1282 | ||
8284c2cb | 1283 | r = unit_add_mounts_for(u, "/var/tmp", UNIT_DEPENDENCY_FILE, UNIT_MOUNT_WANTS); |
b2c7d1bb FB |
1284 | if (r < 0) |
1285 | return r; | |
b46a529c | 1286 | |
35d8c19a | 1287 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1288 | if (r < 0) |
1289 | return r; | |
1290 | } | |
1291 | ||
33b58dfb LP |
1292 | if (c->root_image) { |
1293 | /* We need to wait for /dev/loopX to appear when doing RootImage=, hence let's add an | |
1294 | * implicit dependency on udev */ | |
1295 | ||
1296 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_UDEVD_SERVICE, true, UNIT_DEPENDENCY_FILE); | |
1297 | if (r < 0) | |
1298 | return r; | |
1299 | } | |
1300 | ||
52c239d7 LB |
1301 | if (!IN_SET(c->std_output, |
1302 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1303 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
52c239d7 LB |
1304 | !IN_SET(c->std_error, |
1305 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1306 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
91dd5f7c | 1307 | !c->log_namespace) |
23a177ef LP |
1308 | return 0; |
1309 | ||
91dd5f7c LP |
1310 | /* If syslog or kernel logging is requested (or log namespacing is), make sure our own logging daemon |
1311 | * is run first. */ | |
1312 | ||
1313 | if (c->log_namespace) { | |
61628287 | 1314 | _cleanup_free_ char *unit = NULL; |
23a177ef | 1315 | |
61628287 | 1316 | r = unit_name_build_from_type("systemd-journald", c->log_namespace, UNIT_SOCKET, &unit); |
91dd5f7c LP |
1317 | if (r < 0) |
1318 | return r; | |
1319 | ||
61628287 | 1320 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, unit, true, UNIT_DEPENDENCY_FILE); |
91dd5f7c LP |
1321 | if (r < 0) |
1322 | return r; | |
dc5437c7 | 1323 | |
61628287 YW |
1324 | unit = mfree(unit); |
1325 | ||
1326 | r = unit_name_build_from_type("systemd-journald-varlink", c->log_namespace, UNIT_SOCKET, &unit); | |
1327 | if (r < 0) | |
1328 | return r; | |
1329 | ||
1330 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, unit, true, UNIT_DEPENDENCY_FILE); | |
1331 | if (r < 0) | |
1332 | return r; | |
1333 | ||
1334 | unit = mfree(unit); | |
1335 | ||
1336 | r = unit_name_build_from_type("systemd-journald-sync", c->log_namespace, UNIT_SERVICE, &unit); | |
dc5437c7 LP |
1337 | if (r < 0) |
1338 | return r; | |
1339 | ||
61628287 | 1340 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, unit, true, UNIT_DEPENDENCY_FILE); |
dc5437c7 LP |
1341 | if (r < 0) |
1342 | return r; | |
7d202fb3 | 1343 | } else { |
91dd5f7c | 1344 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, true, UNIT_DEPENDENCY_FILE); |
ce18c396 LP |
1345 | if (r < 0) |
1346 | return r; | |
1347 | } | |
1348 | ||
7d202fb3 YW |
1349 | r = unit_add_default_credential_dependencies(u, c); |
1350 | if (r < 0) | |
1351 | return r; | |
1352 | ||
87f0e418 LP |
1353 | return 0; |
1354 | } | |
1355 | ||
04d232d8 | 1356 | const char* unit_description(Unit *u) { |
87f0e418 LP |
1357 | assert(u); |
1358 | ||
ac155bb8 MS |
1359 | if (u->description) |
1360 | return u->description; | |
87f0e418 | 1361 | |
ac155bb8 | 1362 | return strna(u->id); |
87f0e418 LP |
1363 | } |
1364 | ||
e6a16a82 | 1365 | const char* unit_status_string(Unit *u, char **ret_combined_buffer) { |
2a8f53c6 | 1366 | assert(u); |
04d232d8 | 1367 | assert(u->id); |
2a8f53c6 | 1368 | |
04d232d8 ZJS |
1369 | /* Return u->id, u->description, or "{u->id} - {u->description}". |
1370 | * Versions with u->description are only used if it is set. | |
e6a16a82 ZJS |
1371 | * The last option is used if configured and the caller provided the 'ret_combined_buffer' |
1372 | * pointer. | |
1373 | * | |
1374 | * Note that *ret_combined_buffer may be set to NULL. */ | |
04d232d8 ZJS |
1375 | |
1376 | if (!u->description || | |
1377 | u->manager->status_unit_format == STATUS_UNIT_FORMAT_NAME || | |
e6a16a82 ZJS |
1378 | (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED && !ret_combined_buffer) || |
1379 | streq(u->description, u->id)) { | |
1380 | ||
1381 | if (ret_combined_buffer) | |
1382 | *ret_combined_buffer = NULL; | |
2a8f53c6 | 1383 | return u->id; |
e6a16a82 | 1384 | } |
2a8f53c6 | 1385 | |
e6a16a82 ZJS |
1386 | if (ret_combined_buffer) { |
1387 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED) { | |
1388 | *ret_combined_buffer = strjoin(u->id, " - ", u->description); | |
1389 | if (*ret_combined_buffer) | |
1390 | return *ret_combined_buffer; | |
1391 | log_oom(); /* Fall back to ->description */ | |
04d232d8 | 1392 | } else |
e6a16a82 | 1393 | *ret_combined_buffer = NULL; |
04d232d8 ZJS |
1394 | } |
1395 | ||
1396 | return u->description; | |
2a8f53c6 ZJS |
1397 | } |
1398 | ||
87f0e418 | 1399 | /* Common implementation for multiple backends */ |
c3620770 | 1400 | int unit_load_fragment_and_dropin(Unit *u, bool fragment_required) { |
23a177ef LP |
1401 | int r; |
1402 | ||
1403 | assert(u); | |
23a177ef | 1404 | |
e48614c4 | 1405 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1406 | r = unit_load_fragment(u); |
1407 | if (r < 0) | |
23a177ef LP |
1408 | return r; |
1409 | ||
c3620770 ZJS |
1410 | if (u->load_state == UNIT_STUB) { |
1411 | if (fragment_required) | |
1412 | return -ENOENT; | |
1413 | ||
1414 | u->load_state = UNIT_LOADED; | |
1415 | } | |
23a177ef | 1416 | |
9e4ea9cc ZJS |
1417 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1418 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1419 | * been loaded and which not, at least without doing complicated book-keeping, | |
1420 | * so let's always reread all drop-ins. */ | |
c9e06956 ZJS |
1421 | r = unit_load_dropin(unit_follow_merge(u)); |
1422 | if (r < 0) | |
1423 | return r; | |
1424 | ||
1425 | if (u->source_path) { | |
1426 | struct stat st; | |
1427 | ||
1428 | if (stat(u->source_path, &st) >= 0) | |
1429 | u->source_mtime = timespec_load(&st.st_mtim); | |
1430 | else | |
1431 | u->source_mtime = 0; | |
1432 | } | |
1433 | ||
1434 | return 0; | |
23a177ef LP |
1435 | } |
1436 | ||
19496554 | 1437 | void unit_add_to_target_deps_queue(Unit *u) { |
fbd747a4 | 1438 | Manager *m = ASSERT_PTR(ASSERT_PTR(u)->manager); |
c9958c4f | 1439 | |
19496554 MS |
1440 | if (u->in_target_deps_queue) |
1441 | return; | |
1442 | ||
1443 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1444 | u->in_target_deps_queue = true; | |
1445 | } | |
1446 | ||
bba34eed | 1447 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1448 | assert(u); |
1449 | assert(target); | |
1450 | ||
ac155bb8 | 1451 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1452 | return 0; |
1453 | ||
35b8ca3a | 1454 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1455 | * that loop check below is reliable */ |
ac155bb8 MS |
1456 | if (u->load_state != UNIT_LOADED || |
1457 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1458 | return 0; |
1459 | ||
21256a2b LP |
1460 | /* If either side wants no automatic dependencies, then let's |
1461 | * skip this */ | |
ac155bb8 MS |
1462 | if (!u->default_dependencies || |
1463 | !target->default_dependencies) | |
21256a2b LP |
1464 | return 0; |
1465 | ||
98bc2000 | 1466 | /* Don't create loops */ |
15ed3c3a | 1467 | if (unit_has_dependency(target, UNIT_ATOM_BEFORE, u)) |
98bc2000 LP |
1468 | return 0; |
1469 | ||
eef85c4a | 1470 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1471 | } |
1472 | ||
e954c9cf | 1473 | static int unit_add_slice_dependencies(Unit *u) { |
12f64221 | 1474 | Unit *slice; |
e954c9cf | 1475 | assert(u); |
b81884e7 | 1476 | |
35b7ff80 | 1477 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1478 | return 0; |
1479 | ||
eef85c4a LP |
1480 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1481 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1482 | relationship). */ | |
f6173cb9 | 1483 | UnitDependencyMask mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; |
eef85c4a | 1484 | |
12f64221 LP |
1485 | slice = UNIT_GET_SLICE(u); |
1486 | if (slice) | |
1487 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, slice, true, mask); | |
e954c9cf | 1488 | |
8c8da0e0 | 1489 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1490 | return 0; |
1491 | ||
5a724170 | 1492 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, true, mask); |
98bc2000 LP |
1493 | } |
1494 | ||
e954c9cf | 1495 | static int unit_add_mount_dependencies(Unit *u) { |
a8c5a4c6 | 1496 | bool changed = false; |
9588bc32 LP |
1497 | int r; |
1498 | ||
1499 | assert(u); | |
1500 | ||
9e615fa3 LB |
1501 | for (UnitMountDependencyType t = 0; t < _UNIT_MOUNT_DEPENDENCY_TYPE_MAX; ++t) { |
1502 | UnitDependencyInfo di; | |
1503 | const char *path; | |
9588bc32 | 1504 | |
9e615fa3 | 1505 | HASHMAP_FOREACH_KEY(di.data, path, u->mounts_for[t]) { |
9588bc32 | 1506 | |
9e615fa3 | 1507 | char prefix[strlen(ASSERT_PTR(path)) + 1]; |
c7c89abb | 1508 | |
9e615fa3 LB |
1509 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
1510 | _cleanup_free_ char *p = NULL; | |
1511 | Unit *m; | |
9588bc32 | 1512 | |
9e615fa3 LB |
1513 | r = unit_name_from_path(prefix, ".mount", &p); |
1514 | if (r == -EINVAL) | |
1515 | continue; /* If the path cannot be converted to a mount unit name, | |
1516 | * then it's not manageable as a unit by systemd, and | |
1517 | * hence we don't need a dependency on it. Let's thus | |
1518 | * silently ignore the issue. */ | |
1519 | if (r < 0) | |
1520 | return r; | |
9588bc32 | 1521 | |
9e615fa3 LB |
1522 | m = manager_get_unit(u->manager, p); |
1523 | if (!m) { | |
1524 | /* Make sure to load the mount unit if it exists. If so the | |
1525 | * dependencies on this unit will be added later during the loading | |
1526 | * of the mount unit. */ | |
1527 | (void) manager_load_unit_prepare( | |
1528 | u->manager, | |
1529 | p, | |
1530 | /* path= */NULL, | |
1531 | /* e= */NULL, | |
1532 | &m); | |
1533 | continue; | |
1534 | } | |
1535 | if (m == u) | |
1536 | continue; | |
1537 | ||
1538 | if (m->load_state != UNIT_LOADED) | |
1539 | continue; | |
9588bc32 | 1540 | |
9e615fa3 LB |
1541 | r = unit_add_dependency( |
1542 | u, | |
1543 | UNIT_AFTER, | |
1544 | m, | |
1545 | /* add_reference= */ true, | |
1546 | di.origin_mask); | |
9588bc32 LP |
1547 | if (r < 0) |
1548 | return r; | |
a8c5a4c6 | 1549 | changed = changed || r > 0; |
9e615fa3 LB |
1550 | |
1551 | if (m->fragment_path) { | |
1552 | r = unit_add_dependency( | |
1553 | u, | |
1554 | unit_mount_dependency_type_to_dependency_type(t), | |
1555 | m, | |
1556 | /* add_reference= */ true, | |
1557 | di.origin_mask); | |
1558 | if (r < 0) | |
1559 | return r; | |
1560 | changed = changed || r > 0; | |
1561 | } | |
9588bc32 LP |
1562 | } |
1563 | } | |
1564 | } | |
1565 | ||
a8c5a4c6 | 1566 | return changed; |
9588bc32 LP |
1567 | } |
1568 | ||
a2db0225 AZ |
1569 | static int unit_add_oomd_dependencies(Unit *u) { |
1570 | CGroupContext *c; | |
2a4efebb ZJS |
1571 | CGroupMask mask; |
1572 | int r; | |
a2db0225 AZ |
1573 | |
1574 | assert(u); | |
1575 | ||
1576 | if (!u->default_dependencies) | |
1577 | return 0; | |
1578 | ||
1579 | c = unit_get_cgroup_context(u); | |
1580 | if (!c) | |
1581 | return 0; | |
1582 | ||
2a4efebb | 1583 | bool wants_oomd = c->moom_swap == MANAGED_OOM_KILL || c->moom_mem_pressure == MANAGED_OOM_KILL; |
a2db0225 AZ |
1584 | if (!wants_oomd) |
1585 | return 0; | |
1586 | ||
2a4efebb ZJS |
1587 | if (!cg_all_unified()) |
1588 | return 0; | |
1589 | ||
1590 | r = cg_mask_supported(&mask); | |
1591 | if (r < 0) | |
1592 | return log_debug_errno(r, "Failed to determine supported controllers: %m"); | |
1593 | ||
1594 | if (!FLAGS_SET(mask, CGROUP_MASK_MEMORY)) | |
1595 | return 0; | |
1596 | ||
a8c5a4c6 | 1597 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "systemd-oomd.service", true, UNIT_DEPENDENCY_FILE); |
a2db0225 AZ |
1598 | } |
1599 | ||
95ae05c0 | 1600 | static int unit_add_startup_units(Unit *u) { |
9dfb6a3a | 1601 | if (!unit_has_startup_cgroup_constraints(u)) |
db785129 LP |
1602 | return 0; |
1603 | ||
de7fef4b | 1604 | return set_ensure_put(&u->manager->startup_units, NULL, u); |
95ae05c0 WC |
1605 | } |
1606 | ||
294446dc LP |
1607 | static int unit_validate_on_failure_job_mode( |
1608 | Unit *u, | |
1609 | const char *job_mode_setting, | |
1610 | JobMode job_mode, | |
1611 | const char *dependency_name, | |
1612 | UnitDependencyAtom atom) { | |
1613 | ||
1614 | Unit *other, *found = NULL; | |
1615 | ||
1616 | if (job_mode != JOB_ISOLATE) | |
1617 | return 0; | |
1618 | ||
1619 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
1620 | if (!found) | |
1621 | found = other; | |
1622 | else if (found != other) | |
1623 | return log_unit_error_errno( | |
1624 | u, SYNTHETIC_ERRNO(ENOEXEC), | |
1625 | "More than one %s dependencies specified but %sisolate set. Refusing.", | |
1626 | dependency_name, job_mode_setting); | |
1627 | } | |
1628 | ||
1629 | return 0; | |
1630 | } | |
1631 | ||
87f0e418 LP |
1632 | int unit_load(Unit *u) { |
1633 | int r; | |
1634 | ||
1635 | assert(u); | |
1636 | ||
ac155bb8 | 1637 | if (u->in_load_queue) { |
71fda00f | 1638 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1639 | u->in_load_queue = false; |
87f0e418 LP |
1640 | } |
1641 | ||
ac155bb8 | 1642 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1643 | return -EINVAL; |
1644 | ||
ac155bb8 | 1645 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1646 | return 0; |
1647 | ||
4f4afc88 | 1648 | if (u->transient_file) { |
66fa4bdd LP |
1649 | /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup |
1650 | * is complete, hence let's synchronize the unit file we just wrote to disk. */ | |
1651 | ||
4f4afc88 LP |
1652 | r = fflush_and_check(u->transient_file); |
1653 | if (r < 0) | |
1654 | goto fail; | |
1655 | ||
50fb00b7 | 1656 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1657 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1658 | } |
1659 | ||
c3784a7d ZJS |
1660 | r = UNIT_VTABLE(u)->load(u); |
1661 | if (r < 0) | |
23a177ef | 1662 | goto fail; |
c3784a7d ZJS |
1663 | |
1664 | assert(u->load_state != UNIT_STUB); | |
23a177ef | 1665 | |
7c8fa05c | 1666 | if (u->load_state == UNIT_LOADED) { |
19496554 | 1667 | unit_add_to_target_deps_queue(u); |
e954c9cf LP |
1668 | |
1669 | r = unit_add_slice_dependencies(u); | |
1670 | if (r < 0) | |
1671 | goto fail; | |
c2756a68 | 1672 | |
e954c9cf | 1673 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1674 | if (r < 0) |
c2756a68 | 1675 | goto fail; |
7c8fa05c | 1676 | |
a2db0225 AZ |
1677 | r = unit_add_oomd_dependencies(u); |
1678 | if (r < 0) | |
1679 | goto fail; | |
1680 | ||
95ae05c0 WC |
1681 | r = unit_add_startup_units(u); |
1682 | if (r < 0) | |
1683 | goto fail; | |
1684 | ||
294446dc LP |
1685 | r = unit_validate_on_failure_job_mode(u, "OnSuccessJobMode=", u->on_success_job_mode, "OnSuccess=", UNIT_ATOM_ON_SUCCESS); |
1686 | if (r < 0) | |
1687 | goto fail; | |
15ed3c3a | 1688 | |
294446dc LP |
1689 | r = unit_validate_on_failure_job_mode(u, "OnFailureJobMode=", u->on_failure_job_mode, "OnFailure=", UNIT_ATOM_ON_FAILURE); |
1690 | if (r < 0) | |
1691 | goto fail; | |
bc432dc7 | 1692 | |
a2df3ea4 MK |
1693 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1694 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1695 | ||
5af88058 LP |
1696 | /* We finished loading, let's ensure our parents recalculate the members mask */ |
1697 | unit_invalidate_cgroup_members_masks(u); | |
f68319bb LP |
1698 | } |
1699 | ||
ac155bb8 | 1700 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1701 | |
1702 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1703 | unit_add_to_gc_queue(u); |
f561e8c6 | 1704 | (void) manager_varlink_send_managed_oom_update(u); |
87f0e418 | 1705 | |
87f0e418 LP |
1706 | return 0; |
1707 | ||
1708 | fail: | |
81be2388 ZJS |
1709 | /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code |
1710 | * should hence return ENOEXEC to ensure units are placed in this state after loading. */ | |
c4555ad8 LP |
1711 | |
1712 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : | |
1713 | r == -ENOEXEC ? UNIT_BAD_SETTING : | |
1714 | UNIT_ERROR; | |
ac155bb8 | 1715 | u->load_error = r; |
c4555ad8 | 1716 | |
c149d2b4 ZJS |
1717 | /* Record the timestamp on the cache, so that if the cache gets updated between now and the next time |
1718 | * an attempt is made to load this unit, we know we need to check again. */ | |
7233e91a | 1719 | if (u->load_state == UNIT_NOT_FOUND) |
c2911d48 | 1720 | u->fragment_not_found_timestamp_hash = u->manager->unit_cache_timestamp_hash; |
7233e91a | 1721 | |
c1e1601e | 1722 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1723 | unit_add_to_gc_queue(u); |
23a177ef | 1724 | |
c4555ad8 | 1725 | return log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
87f0e418 LP |
1726 | } |
1727 | ||
f9f88198 YW |
1728 | _printf_(7, 8) |
1729 | static int log_unit_internal(void *userdata, int level, int error, const char *file, int line, const char *func, const char *format, ...) { | |
1730 | Unit *u = userdata; | |
1731 | va_list ap; | |
1732 | int r; | |
49365733 | 1733 | |
c2503e35 RH |
1734 | if (u && !unit_log_level_test(u, level)) |
1735 | return -ERRNO_VALUE(error); | |
1736 | ||
f9f88198 YW |
1737 | va_start(ap, format); |
1738 | if (u) | |
1739 | r = log_object_internalv(level, error, file, line, func, | |
1740 | u->manager->unit_log_field, | |
1741 | u->id, | |
1742 | u->manager->invocation_log_field, | |
1743 | u->invocation_id_string, | |
1744 | format, ap); | |
1745 | else | |
1746 | r = log_internalv(level, error, file, line, func, format, ap); | |
1747 | va_end(ap); | |
49365733 | 1748 | |
f9f88198 | 1749 | return r; |
49365733 LP |
1750 | } |
1751 | ||
97a3f4ee | 1752 | static bool unit_test_condition(Unit *u) { |
a0b191b7 LP |
1753 | _cleanup_strv_free_ char **env = NULL; |
1754 | int r; | |
1755 | ||
90bbc946 LP |
1756 | assert(u); |
1757 | ||
fa5a0251 | 1758 | dual_timestamp_now(&u->condition_timestamp); |
90bbc946 | 1759 | |
a0b191b7 LP |
1760 | r = manager_get_effective_environment(u->manager, &env); |
1761 | if (r < 0) { | |
1762 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
d52cc0a5 | 1763 | u->condition_result = true; |
a0b191b7 LP |
1764 | } else |
1765 | u->condition_result = condition_test_list( | |
1766 | u->conditions, | |
1767 | env, | |
1768 | condition_type_to_string, | |
1769 | log_unit_internal, | |
1770 | u); | |
e18f8852 | 1771 | |
a0b191b7 | 1772 | unit_add_to_dbus_queue(u); |
ac155bb8 | 1773 | return u->condition_result; |
90bbc946 LP |
1774 | } |
1775 | ||
97a3f4ee | 1776 | static bool unit_test_assert(Unit *u) { |
a0b191b7 LP |
1777 | _cleanup_strv_free_ char **env = NULL; |
1778 | int r; | |
1779 | ||
59fccdc5 LP |
1780 | assert(u); |
1781 | ||
fa5a0251 | 1782 | dual_timestamp_now(&u->assert_timestamp); |
59fccdc5 | 1783 | |
a0b191b7 LP |
1784 | r = manager_get_effective_environment(u->manager, &env); |
1785 | if (r < 0) { | |
1786 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
1787 | u->assert_result = CONDITION_ERROR; | |
1788 | } else | |
1789 | u->assert_result = condition_test_list( | |
1790 | u->asserts, | |
1791 | env, | |
1792 | assert_type_to_string, | |
1793 | log_unit_internal, | |
1794 | u); | |
e18f8852 | 1795 | |
a0b191b7 | 1796 | unit_add_to_dbus_queue(u); |
59fccdc5 LP |
1797 | return u->assert_result; |
1798 | } | |
1799 | ||
04d232d8 ZJS |
1800 | void unit_status_printf(Unit *u, StatusType status_type, const char *status, const char *format, const char *ident) { |
1801 | if (log_get_show_color()) { | |
1802 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED && strchr(ident, ' ')) | |
1803 | ident = strjoina(ANSI_HIGHLIGHT, u->id, ANSI_NORMAL, " - ", u->description); | |
1804 | else | |
1805 | ident = strjoina(ANSI_HIGHLIGHT, ident, ANSI_NORMAL); | |
1806 | } | |
5b262f74 | 1807 | |
df446f96 | 1808 | DISABLE_WARNING_FORMAT_NONLITERAL; |
04d232d8 | 1809 | manager_status_printf(u->manager, status_type, status, format, ident); |
df446f96 LP |
1810 | REENABLE_WARNING; |
1811 | } | |
1812 | ||
97a3f4ee | 1813 | int unit_test_start_limit(Unit *u) { |
429926e9 TR |
1814 | const char *reason; |
1815 | ||
6bf0f408 LP |
1816 | assert(u); |
1817 | ||
7bf081a1 | 1818 | if (ratelimit_below(&u->start_ratelimit)) { |
6bf0f408 LP |
1819 | u->start_limit_hit = false; |
1820 | return 0; | |
1821 | } | |
1822 | ||
1823 | log_unit_warning(u, "Start request repeated too quickly."); | |
1824 | u->start_limit_hit = true; | |
1825 | ||
429926e9 TR |
1826 | reason = strjoina("unit ", u->id, " failed"); |
1827 | ||
36c4dc08 LP |
1828 | emergency_action(u->manager, u->start_limit_action, |
1829 | EMERGENCY_ACTION_IS_WATCHDOG|EMERGENCY_ACTION_WARN, | |
1830 | u->reboot_arg, -1, reason); | |
1831 | ||
1832 | return -ECANCELED; | |
6bf0f408 LP |
1833 | } |
1834 | ||
631b676b LP |
1835 | static bool unit_verify_deps(Unit *u) { |
1836 | Unit *other; | |
631b676b LP |
1837 | |
1838 | assert(u); | |
1839 | ||
defe63b0 LP |
1840 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined |
1841 | * with After=. We do not check Requires= or Requisite= here as they only should have an effect on | |
1842 | * the job processing, but do not have any effect afterwards. We don't check BindsTo= dependencies | |
1843 | * that are not used in conjunction with After= as for them any such check would make things entirely | |
1844 | * racy. */ | |
631b676b | 1845 | |
15ed3c3a | 1846 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { |
631b676b | 1847 | |
15ed3c3a | 1848 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other)) |
631b676b LP |
1849 | continue; |
1850 | ||
1851 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1852 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1853 | return false; | |
1854 | } | |
1855 | } | |
1856 | ||
1857 | return true; | |
1858 | } | |
1859 | ||
9adb6959 | 1860 | /* Errors that aren't really errors: |
6bf0f408 | 1861 | * -EALREADY: Unit is already started. |
9adb6959 | 1862 | * -ECOMM: Condition failed |
6bf0f408 | 1863 | * -EAGAIN: An operation is already in progress. Retry later. |
9adb6959 LP |
1864 | * |
1865 | * Errors that are real errors: | |
1866 | * -EBADR: This unit type does not support starting. | |
2de9b979 | 1867 | * -ECANCELED: Start limit hit, too many requests for now |
6bf0f408 LP |
1868 | * -EPROTO: Assert failed |
1869 | * -EINVAL: Unit not loaded | |
1870 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1871 | * -ENOLINK: The necessary dependencies are not fulfilled. |
d4fd1cf2 | 1872 | * -ESTALE: This unit has been started before and can't be started a second time |
a4191c9f | 1873 | * -ENOENT: This is a triggering unit and unit to trigger is not loaded |
87f0e418 | 1874 | */ |
48b92b37 | 1875 | int unit_start(Unit *u, ActivationDetails *details) { |
87f0e418 | 1876 | UnitActiveState state; |
92ab323c | 1877 | Unit *following; |
5f37c1a9 | 1878 | int r; |
87f0e418 LP |
1879 | |
1880 | assert(u); | |
1881 | ||
47261967 LP |
1882 | /* Let's hold off running start jobs for mount units when /proc/self/mountinfo monitor is ratelimited. */ |
1883 | if (UNIT_VTABLE(u)->subsystem_ratelimited) { | |
1884 | r = UNIT_VTABLE(u)->subsystem_ratelimited(u->manager); | |
1885 | if (r < 0) | |
1886 | return r; | |
1887 | if (r > 0) | |
1888 | return -EAGAIN; | |
1889 | } | |
b161bc39 | 1890 | |
5766aca8 LP |
1891 | /* If this is already started, then this will succeed. Note that this will even succeed if this unit |
1892 | * is not startable by the user. This is relied on to detect when we need to wait for units and when | |
1893 | * waiting is finished. */ | |
87f0e418 LP |
1894 | state = unit_active_state(u); |
1895 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1896 | return -EALREADY; | |
380dc8b0 LP |
1897 | if (state == UNIT_MAINTENANCE) |
1898 | return -EAGAIN; | |
87f0e418 | 1899 | |
6bf0f408 LP |
1900 | /* Units that aren't loaded cannot be started */ |
1901 | if (u->load_state != UNIT_LOADED) | |
1902 | return -EINVAL; | |
1903 | ||
d4fd1cf2 LP |
1904 | /* Refuse starting scope units more than once */ |
1905 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1906 | return -ESTALE; | |
1907 | ||
4e1ac54e | 1908 | /* If the conditions were unmet, don't do anything at all. If we already are activating this call might |
5766aca8 LP |
1909 | * still be useful to speed up activation in case there is some hold-off time, but we don't want to |
1910 | * recheck the condition in that case. */ | |
a82e5507 | 1911 | if (state != UNIT_ACTIVATING && |
5af6aa58 | 1912 | !unit_test_condition(u)) |
4e1ac54e | 1913 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(ECOMM), "Starting requested but condition not met. Not starting unit."); |
52661efd | 1914 | |
59fccdc5 LP |
1915 | /* If the asserts failed, fail the entire job */ |
1916 | if (state != UNIT_ACTIVATING && | |
5766aca8 LP |
1917 | !unit_test_assert(u)) |
1918 | return log_unit_notice_errno(u, SYNTHETIC_ERRNO(EPROTO), "Starting requested but asserts failed."); | |
59fccdc5 | 1919 | |
5766aca8 LP |
1920 | /* Units of types that aren't supported cannot be started. Note that we do this test only after the |
1921 | * condition checks, so that we rather return condition check errors (which are usually not | |
1922 | * considered a true failure) than "not supported" errors (which are considered a failure). | |
d11a7645 | 1923 | */ |
96cf3ec9 | 1924 | if (!unit_type_supported(u->type)) |
d11a7645 LP |
1925 | return -EOPNOTSUPP; |
1926 | ||
5766aca8 LP |
1927 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine |
1928 | * should have taken care of this already, but let's check this here again. After all, our | |
413e8650 | 1929 | * dependencies might not be in effect anymore, due to a reload or due to an unmet condition. */ |
631b676b LP |
1930 | if (!unit_verify_deps(u)) |
1931 | return -ENOLINK; | |
1932 | ||
92ab323c | 1933 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1934 | following = unit_following(u); |
1935 | if (following) { | |
f2341e0a | 1936 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
48b92b37 | 1937 | return unit_start(following, details); |
92ab323c LP |
1938 | } |
1939 | ||
4cb2e6af AV |
1940 | /* Check to make sure the unit isn't frozen */ |
1941 | if (u->freezer_state != FREEZER_RUNNING) | |
1942 | return -EDEADLK; | |
1943 | ||
705578c3 MS |
1944 | /* Check our ability to start early so that failure conditions don't cause us to enter a busy loop. */ |
1945 | if (UNIT_VTABLE(u)->can_start) { | |
1946 | r = UNIT_VTABLE(u)->can_start(u); | |
ce2146f5 DDM |
1947 | if (r < 0) |
1948 | return r; | |
1949 | } | |
1950 | ||
92ab323c LP |
1951 | /* If it is stopped, but we cannot start it, then fail */ |
1952 | if (!UNIT_VTABLE(u)->start) | |
1953 | return -EBADR; | |
1954 | ||
5766aca8 LP |
1955 | /* We don't suppress calls to ->start() here when we are already starting, to allow this request to |
1956 | * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it | |
1957 | * waits for a holdoff timer to elapse before it will start again. */ | |
87f0e418 | 1958 | |
c1e1601e | 1959 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1960 | |
48b92b37 LB |
1961 | if (!u->activation_details) /* Older details object wins */ |
1962 | u->activation_details = activation_details_ref(details); | |
1963 | ||
d1a34ae9 | 1964 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1965 | } |
1966 | ||
1967 | bool unit_can_start(Unit *u) { | |
1968 | assert(u); | |
1969 | ||
8ff4d2ab LP |
1970 | if (u->load_state != UNIT_LOADED) |
1971 | return false; | |
1972 | ||
96cf3ec9 | 1973 | if (!unit_type_supported(u->type)) |
8ff4d2ab LP |
1974 | return false; |
1975 | ||
d4fd1cf2 LP |
1976 | /* Scope units may be started only once */ |
1977 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
1978 | return false; | |
1979 | ||
87f0e418 LP |
1980 | return !!UNIT_VTABLE(u)->start; |
1981 | } | |
1982 | ||
2528a7a6 LP |
1983 | bool unit_can_isolate(Unit *u) { |
1984 | assert(u); | |
1985 | ||
1986 | return unit_can_start(u) && | |
ac155bb8 | 1987 | u->allow_isolate; |
2528a7a6 LP |
1988 | } |
1989 | ||
87f0e418 LP |
1990 | /* Errors: |
1991 | * -EBADR: This unit type does not support stopping. | |
1992 | * -EALREADY: Unit is already stopped. | |
1993 | * -EAGAIN: An operation is already in progress. Retry later. | |
4cb2e6af | 1994 | * -EDEADLK: Unit is frozen |
87f0e418 LP |
1995 | */ |
1996 | int unit_stop(Unit *u) { | |
1997 | UnitActiveState state; | |
92ab323c | 1998 | Unit *following; |
87f0e418 LP |
1999 | |
2000 | assert(u); | |
2001 | ||
87f0e418 | 2002 | state = unit_active_state(u); |
fdf20a31 | 2003 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
2004 | return -EALREADY; |
2005 | ||
0faacd47 LP |
2006 | following = unit_following(u); |
2007 | if (following) { | |
f2341e0a | 2008 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
2009 | return unit_stop(following); |
2010 | } | |
2011 | ||
4cb2e6af AV |
2012 | /* Check to make sure the unit isn't frozen */ |
2013 | if (u->freezer_state != FREEZER_RUNNING) | |
2014 | return -EDEADLK; | |
2015 | ||
7898b0cf LP |
2016 | if (!UNIT_VTABLE(u)->stop) |
2017 | return -EBADR; | |
2018 | ||
c1e1601e | 2019 | unit_add_to_dbus_queue(u); |
9e58ff9c | 2020 | |
d1a34ae9 | 2021 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
2022 | } |
2023 | ||
f5869324 LP |
2024 | bool unit_can_stop(Unit *u) { |
2025 | assert(u); | |
2026 | ||
39c79477 ZJS |
2027 | /* Note: if we return true here, it does not mean that the unit may be successfully stopped. |
2028 | * Extrinsic units follow external state and they may stop following external state changes | |
2029 | * (hence we return true here), but an attempt to do this through the manager will fail. */ | |
2030 | ||
96cf3ec9 | 2031 | if (!unit_type_supported(u->type)) |
f5869324 LP |
2032 | return false; |
2033 | ||
2034 | if (u->perpetual) | |
2035 | return false; | |
2036 | ||
2037 | return !!UNIT_VTABLE(u)->stop; | |
2038 | } | |
2039 | ||
87f0e418 LP |
2040 | /* Errors: |
2041 | * -EBADR: This unit type does not support reloading. | |
2042 | * -ENOEXEC: Unit is not started. | |
2043 | * -EAGAIN: An operation is already in progress. Retry later. | |
4cb2e6af | 2044 | * -EDEADLK: Unit is frozen. |
87f0e418 LP |
2045 | */ |
2046 | int unit_reload(Unit *u) { | |
2047 | UnitActiveState state; | |
92ab323c | 2048 | Unit *following; |
87f0e418 LP |
2049 | |
2050 | assert(u); | |
2051 | ||
ac155bb8 | 2052 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
2053 | return -EINVAL; |
2054 | ||
87f0e418 LP |
2055 | if (!unit_can_reload(u)) |
2056 | return -EBADR; | |
2057 | ||
2058 | state = unit_active_state(u); | |
e364ad06 | 2059 | if (state == UNIT_RELOADING) |
6255af75 | 2060 | return -EAGAIN; |
87f0e418 | 2061 | |
d85ff944 YW |
2062 | if (state != UNIT_ACTIVE) |
2063 | return log_unit_warning_errno(u, SYNTHETIC_ERRNO(ENOEXEC), "Unit cannot be reloaded because it is inactive."); | |
87f0e418 | 2064 | |
e48614c4 ZJS |
2065 | following = unit_following(u); |
2066 | if (following) { | |
f2341e0a | 2067 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
2068 | return unit_reload(following); |
2069 | } | |
2070 | ||
4cb2e6af AV |
2071 | /* Check to make sure the unit isn't frozen */ |
2072 | if (u->freezer_state != FREEZER_RUNNING) | |
2073 | return -EDEADLK; | |
2074 | ||
c1e1601e | 2075 | unit_add_to_dbus_queue(u); |
82a2b6bb | 2076 | |
f54bcca5 JR |
2077 | if (!UNIT_VTABLE(u)->reload) { |
2078 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
96b09de5 | 2079 | unit_notify(u, unit_active_state(u), unit_active_state(u), /* reload_success = */ true); |
f54bcca5 JR |
2080 | return 0; |
2081 | } | |
2082 | ||
d1a34ae9 | 2083 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
2084 | } |
2085 | ||
2086 | bool unit_can_reload(Unit *u) { | |
2087 | assert(u); | |
2088 | ||
f54bcca5 JR |
2089 | if (UNIT_VTABLE(u)->can_reload) |
2090 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 2091 | |
15ed3c3a | 2092 | if (unit_has_dependency(u, UNIT_ATOM_PROPAGATES_RELOAD_TO, NULL)) |
87f0e418 LP |
2093 | return true; |
2094 | ||
f54bcca5 | 2095 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
2096 | } |
2097 | ||
a3c1168a | 2098 | bool unit_is_unneeded(Unit *u) { |
15ed3c3a | 2099 | Unit *other; |
f3bff0eb LP |
2100 | assert(u); |
2101 | ||
ac155bb8 | 2102 | if (!u->stop_when_unneeded) |
a3c1168a | 2103 | return false; |
f3bff0eb | 2104 | |
a3c1168a | 2105 | /* Don't clean up while the unit is transitioning or is even inactive. */ |
116654d2 | 2106 | if (unit_active_state(u) != UNIT_ACTIVE) |
a3c1168a LP |
2107 | return false; |
2108 | if (u->job) | |
2109 | return false; | |
f3bff0eb | 2110 | |
15ed3c3a | 2111 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_PINS_STOP_WHEN_UNNEEDED) { |
fda09318 | 2112 | /* If a dependent unit has a job queued, is active or transitioning, or is marked for |
a3c1168a | 2113 | * restart, then don't clean this one up. */ |
b81884e7 | 2114 | |
15ed3c3a LP |
2115 | if (other->job) |
2116 | return false; | |
a3c1168a | 2117 | |
15ed3c3a LP |
2118 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
2119 | return false; | |
a3c1168a | 2120 | |
15ed3c3a LP |
2121 | if (unit_will_restart(other)) |
2122 | return false; | |
bea355da LP |
2123 | } |
2124 | ||
a3c1168a LP |
2125 | return true; |
2126 | } | |
f3bff0eb | 2127 | |
0bc488c9 LP |
2128 | bool unit_is_upheld_by_active(Unit *u, Unit **ret_culprit) { |
2129 | Unit *other; | |
2130 | ||
2131 | assert(u); | |
2132 | ||
2133 | /* Checks if the unit needs to be started because it currently is not running, but some other unit | |
2134 | * that is active declared an Uphold= dependencies on it */ | |
2135 | ||
2136 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) || u->job) { | |
2137 | if (ret_culprit) | |
2138 | *ret_culprit = NULL; | |
2139 | return false; | |
2140 | } | |
2141 | ||
2142 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_START_STEADILY) { | |
2143 | if (other->job) | |
2144 | continue; | |
2145 | ||
2146 | if (UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
2147 | if (ret_culprit) | |
2148 | *ret_culprit = other; | |
2149 | return true; | |
2150 | } | |
2151 | } | |
2152 | ||
2153 | if (ret_culprit) | |
2154 | *ret_culprit = NULL; | |
2155 | return false; | |
2156 | } | |
2157 | ||
56c59592 LP |
2158 | bool unit_is_bound_by_inactive(Unit *u, Unit **ret_culprit) { |
2159 | Unit *other; | |
2160 | ||
2161 | assert(u); | |
2162 | ||
2163 | /* Checks whether this unit is bound to another unit that is inactive, i.e. whether we should stop | |
7802194a | 2164 | * because the other unit is down. */ |
56c59592 LP |
2165 | |
2166 | if (unit_active_state(u) != UNIT_ACTIVE || u->job) { | |
2167 | /* Don't clean up while the unit is transitioning or is even inactive. */ | |
2168 | if (ret_culprit) | |
2169 | *ret_culprit = NULL; | |
2170 | return false; | |
2171 | } | |
2172 | ||
2173 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { | |
2174 | if (other->job) | |
2175 | continue; | |
2176 | ||
2177 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) { | |
3da36106 | 2178 | if (ret_culprit) |
56c59592 LP |
2179 | *ret_culprit = other; |
2180 | ||
2181 | return true; | |
2182 | } | |
2183 | } | |
2184 | ||
2185 | if (ret_culprit) | |
2186 | *ret_culprit = NULL; | |
2187 | return false; | |
2188 | } | |
2189 | ||
a3c1168a | 2190 | static void check_unneeded_dependencies(Unit *u) { |
15ed3c3a | 2191 | Unit *other; |
a3c1168a LP |
2192 | assert(u); |
2193 | ||
2194 | /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */ | |
2195 | ||
15ed3c3a LP |
2196 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_STOP_WHEN_UNNEEDED_QUEUE) |
2197 | unit_submit_to_stop_when_unneeded_queue(other); | |
f3bff0eb LP |
2198 | } |
2199 | ||
0bc488c9 LP |
2200 | static void check_uphold_dependencies(Unit *u) { |
2201 | Unit *other; | |
2202 | assert(u); | |
2203 | ||
2204 | /* Add all units this unit depends on to the queue that processes Uphold= behaviour. */ | |
2205 | ||
2206 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_START_WHEN_UPHELD_QUEUE) | |
2207 | unit_submit_to_start_when_upheld_queue(other); | |
2208 | } | |
2209 | ||
56c59592 | 2210 | static void check_bound_by_dependencies(Unit *u) { |
ff502445 | 2211 | Unit *other; |
ff502445 LP |
2212 | assert(u); |
2213 | ||
56c59592 | 2214 | /* Add all units this unit depends on to the queue that processes BindsTo= stop behaviour. */ |
ff502445 | 2215 | |
56c59592 LP |
2216 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_CANNOT_BE_ACTIVE_WITHOUT_QUEUE) |
2217 | unit_submit_to_stop_when_bound_queue(other); | |
ff502445 LP |
2218 | } |
2219 | ||
87f0e418 | 2220 | static void retroactively_start_dependencies(Unit *u) { |
87f0e418 LP |
2221 | Unit *other; |
2222 | ||
2223 | assert(u); | |
2224 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2225 | ||
15ed3c3a LP |
2226 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_REPLACE) /* Requires= + BindsTo= */ |
2227 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
b81884e7 | 2228 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2229 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
b81884e7 | 2230 | |
15ed3c3a LP |
2231 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_FAIL) /* Wants= */ |
2232 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
b81884e7 | 2233 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2234 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL, NULL); |
87f0e418 | 2235 | |
15ed3c3a | 2236 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_START) /* Conflicts= (and inverse) */ |
b81884e7 | 2237 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2238 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
87f0e418 LP |
2239 | } |
2240 | ||
2241 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 LP |
2242 | Unit *other; |
2243 | ||
2244 | assert(u); | |
2245 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2246 | ||
b81884e7 | 2247 | /* Pull down units which are bound to us recursively if enabled */ |
15ed3c3a | 2248 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_STOP) /* BoundBy= */ |
b81884e7 | 2249 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2250 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
cd0504d0 MS |
2251 | } |
2252 | ||
294446dc LP |
2253 | void unit_start_on_failure( |
2254 | Unit *u, | |
2255 | const char *dependency_name, | |
2256 | UnitDependencyAtom atom, | |
2257 | JobMode job_mode) { | |
2258 | ||
82acee14 | 2259 | int n_jobs = -1; |
c0daa706 | 2260 | Unit *other; |
7f66b026 | 2261 | int r; |
c0daa706 LP |
2262 | |
2263 | assert(u); | |
294446dc LP |
2264 | assert(dependency_name); |
2265 | assert(IN_SET(atom, UNIT_ATOM_ON_SUCCESS, UNIT_ATOM_ON_FAILURE)); | |
2266 | ||
2267 | /* Act on OnFailure= and OnSuccess= dependencies */ | |
c0daa706 | 2268 | |
294446dc | 2269 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { |
7f66b026 | 2270 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
222ae6a8 | 2271 | |
82acee14 | 2272 | if (n_jobs < 0) { |
294446dc | 2273 | log_unit_info(u, "Triggering %s dependencies.", dependency_name); |
82acee14 | 2274 | n_jobs = 0; |
15ed3c3a LP |
2275 | } |
2276 | ||
95c81c55 | 2277 | r = manager_add_job(u->manager, JOB_START, other, job_mode, NULL, &error, NULL); |
c1b6628d | 2278 | if (r < 0) |
294446dc LP |
2279 | log_unit_warning_errno( |
2280 | u, r, "Failed to enqueue %s job, ignoring: %s", | |
2281 | dependency_name, bus_error_message(&error, r)); | |
b3a9d980 | 2282 | n_jobs++; |
222ae6a8 | 2283 | } |
294446dc | 2284 | |
82acee14 | 2285 | if (n_jobs >= 0) |
c0f86d66 | 2286 | log_unit_debug(u, "Triggering %s dependencies done (%i %s).", |
82acee14 | 2287 | dependency_name, n_jobs, n_jobs == 1 ? "job" : "jobs"); |
c0daa706 LP |
2288 | } |
2289 | ||
3ecaa09b LP |
2290 | void unit_trigger_notify(Unit *u) { |
2291 | Unit *other; | |
3ecaa09b LP |
2292 | |
2293 | assert(u); | |
2294 | ||
15ed3c3a | 2295 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_TRIGGERED_BY) |
3ecaa09b LP |
2296 | if (UNIT_VTABLE(other)->trigger_notify) |
2297 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2298 | } | |
2299 | ||
37109b85 ZJS |
2300 | static int raise_level(int log_level, bool condition_info, bool condition_notice) { |
2301 | if (condition_notice && log_level > LOG_NOTICE) | |
2302 | return LOG_NOTICE; | |
2303 | if (condition_info && log_level > LOG_INFO) | |
2304 | return LOG_INFO; | |
2305 | return log_level; | |
2306 | } | |
2307 | ||
915b1d01 | 2308 | static int unit_log_resources(Unit *u) { |
3e5b96ee MY |
2309 | |
2310 | static const struct { | |
2311 | const char *journal_field; | |
2312 | const char *message_suffix; | |
2313 | } memory_fields[_CGROUP_MEMORY_ACCOUNTING_METRIC_CACHED_LAST + 1] = { | |
2314 | [CGROUP_MEMORY_PEAK] = { "MEMORY_PEAK", "memory peak" }, | |
2315 | [CGROUP_MEMORY_SWAP_PEAK] = { "MEMORY_SWAP_PEAK", "memory swap peak" }, | |
2316 | }, ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2317 | [CGROUP_IP_INGRESS_BYTES] = { "IP_METRIC_INGRESS_BYTES", "incoming IP traffic" }, | |
2318 | [CGROUP_IP_EGRESS_BYTES] = { "IP_METRIC_EGRESS_BYTES", "outgoing IP traffic" }, | |
2319 | [CGROUP_IP_INGRESS_PACKETS] = { "IP_METRIC_INGRESS_PACKETS", NULL }, | |
2320 | [CGROUP_IP_EGRESS_PACKETS] = { "IP_METRIC_EGRESS_PACKETS", NULL }, | |
2321 | }, io_fields[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { | |
2322 | [CGROUP_IO_READ_BYTES] = { "IO_METRIC_READ_BYTES", "read from disk" }, | |
2323 | [CGROUP_IO_WRITE_BYTES] = { "IO_METRIC_WRITE_BYTES", "written to disk" }, | |
2324 | [CGROUP_IO_READ_OPERATIONS] = { "IO_METRIC_READ_OPERATIONS", NULL }, | |
2325 | [CGROUP_IO_WRITE_OPERATIONS] = { "IO_METRIC_WRITE_OPERATIONS", NULL }, | |
bc40a20e | 2326 | }; |
915b1d01 | 2327 | |
3e5b96ee MY |
2328 | struct iovec *iovec = NULL; |
2329 | size_t n_iovec = 0; | |
2330 | _cleanup_free_ char *message = NULL, *t = NULL; | |
2331 | nsec_t cpu_nsec = NSEC_INFINITY; | |
2332 | int log_level = LOG_DEBUG; /* May be raised if resources consumed over a threshold */ | |
2333 | ||
915b1d01 LP |
2334 | assert(u); |
2335 | ||
3e5b96ee MY |
2336 | CLEANUP_ARRAY(iovec, n_iovec, iovec_array_free); |
2337 | ||
2338 | iovec = new(struct iovec, 1 + (_CGROUP_MEMORY_ACCOUNTING_METRIC_CACHED_LAST + 1) + | |
2339 | _CGROUP_IP_ACCOUNTING_METRIC_MAX + _CGROUP_IO_ACCOUNTING_METRIC_MAX + 4); | |
2340 | if (!iovec) | |
2341 | return log_oom(); | |
2342 | ||
915b1d01 LP |
2343 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource |
2344 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2345 | * information and the complete data in structured fields. */ | |
2346 | ||
3e5b96ee MY |
2347 | (void) unit_get_cpu_usage(u, &cpu_nsec); |
2348 | if (cpu_nsec != NSEC_INFINITY) { | |
915b1d01 | 2349 | /* Format the CPU time for inclusion in the structured log message */ |
3e5b96ee MY |
2350 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, cpu_nsec) < 0) |
2351 | return log_oom(); | |
2352 | iovec[n_iovec++] = IOVEC_MAKE_STRING(TAKE_PTR(t)); | |
915b1d01 LP |
2353 | |
2354 | /* Format the CPU time for inclusion in the human language message string */ | |
3e5b96ee MY |
2355 | if (strextendf_with_separator(&message, ", ", |
2356 | "Consumed %s CPU time", | |
2357 | FORMAT_TIMESPAN(cpu_nsec / NSEC_PER_USEC, USEC_PER_MSEC)) < 0) | |
2358 | return log_oom(); | |
37109b85 ZJS |
2359 | |
2360 | log_level = raise_level(log_level, | |
3e5b96ee MY |
2361 | cpu_nsec > MENTIONWORTHY_CPU_NSEC, |
2362 | cpu_nsec > NOTICEWORTHY_CPU_NSEC); | |
915b1d01 LP |
2363 | } |
2364 | ||
3e5b96ee | 2365 | for (CGroupMemoryAccountingMetric metric = 0; metric <= _CGROUP_MEMORY_ACCOUNTING_METRIC_CACHED_LAST; metric++) { |
245841a8 | 2366 | uint64_t value = UINT64_MAX; |
0531bded | 2367 | |
3e5b96ee MY |
2368 | assert(memory_fields[metric].journal_field); |
2369 | assert(memory_fields[metric].message_suffix); | |
b1b84bc5 | 2370 | |
245841a8 MY |
2371 | (void) unit_get_memory_accounting(u, metric, &value); |
2372 | if (value == UINT64_MAX) | |
3e5b96ee | 2373 | continue; |
0531bded | 2374 | |
245841a8 | 2375 | if (asprintf(&t, "%s=%" PRIu64, memory_fields[metric].journal_field, value) < 0) |
3e5b96ee MY |
2376 | return log_oom(); |
2377 | iovec[n_iovec++] = IOVEC_MAKE_STRING(TAKE_PTR(t)); | |
aac3384e | 2378 | |
245841a8 MY |
2379 | /* If value is 0, we don't log it in the MESSAGE= field. */ |
2380 | if (value == 0) | |
2381 | continue; | |
2382 | ||
3e5b96ee | 2383 | if (strextendf_with_separator(&message, ", ", "%s %s", |
245841a8 | 2384 | FORMAT_BYTES(value), memory_fields[metric].message_suffix) < 0) |
3e5b96ee | 2385 | return log_oom(); |
b1b84bc5 MY |
2386 | |
2387 | log_level = raise_level(log_level, | |
245841a8 MY |
2388 | value > MENTIONWORTHY_MEMORY_BYTES, |
2389 | value > NOTICEWORTHY_MEMORY_BYTES); | |
aac3384e FS |
2390 | } |
2391 | ||
bc40a20e | 2392 | for (CGroupIOAccountingMetric k = 0; k < _CGROUP_IO_ACCOUNTING_METRIC_MAX; k++) { |
bc40a20e LP |
2393 | uint64_t value = UINT64_MAX; |
2394 | ||
3e5b96ee | 2395 | assert(io_fields[k].journal_field); |
bc40a20e LP |
2396 | |
2397 | (void) unit_get_io_accounting(u, k, k > 0, &value); | |
2398 | if (value == UINT64_MAX) | |
2399 | continue; | |
2400 | ||
bc40a20e | 2401 | /* Format IO accounting data for inclusion in the structured log message */ |
3e5b96ee MY |
2402 | if (asprintf(&t, "%s=%" PRIu64, io_fields[k].journal_field, value) < 0) |
2403 | return log_oom(); | |
2404 | iovec[n_iovec++] = IOVEC_MAKE_STRING(TAKE_PTR(t)); | |
bc40a20e | 2405 | |
245841a8 MY |
2406 | /* If value is 0, we don't log it in the MESSAGE= field. */ |
2407 | if (value == 0) | |
2408 | continue; | |
2409 | ||
bc40a20e LP |
2410 | /* Format the IO accounting data for inclusion in the human language message string, but only |
2411 | * for the bytes counters (and not for the operations counters) */ | |
3e5b96ee MY |
2412 | if (io_fields[k].message_suffix) { |
2413 | if (strextendf_with_separator(&message, ", ", "%s %s", | |
2414 | FORMAT_BYTES(value), io_fields[k].message_suffix) < 0) | |
2415 | return log_oom(); | |
37109b85 | 2416 | |
37109b85 ZJS |
2417 | log_level = raise_level(log_level, |
2418 | value > MENTIONWORTHY_IO_BYTES, | |
2419 | value > NOTICEWORTHY_IO_BYTES); | |
bc40a20e LP |
2420 | } |
2421 | } | |
2422 | ||
12375b95 | 2423 | for (CGroupIPAccountingMetric m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
915b1d01 LP |
2424 | uint64_t value = UINT64_MAX; |
2425 | ||
3e5b96ee | 2426 | assert(ip_fields[m].journal_field); |
915b1d01 LP |
2427 | |
2428 | (void) unit_get_ip_accounting(u, m, &value); | |
2429 | if (value == UINT64_MAX) | |
2430 | continue; | |
82044702 | 2431 | |
915b1d01 | 2432 | /* Format IP accounting data for inclusion in the structured log message */ |
3e5b96ee MY |
2433 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m].journal_field, value) < 0) |
2434 | return log_oom(); | |
2435 | iovec[n_iovec++] = IOVEC_MAKE_STRING(TAKE_PTR(t)); | |
2436 | ||
245841a8 MY |
2437 | /* If value is 0, we don't log it in the MESSAGE= field. */ |
2438 | if (value == 0) | |
2439 | continue; | |
2440 | ||
3e5b96ee MY |
2441 | /* Format the IP accounting data for inclusion in the human language message string, but only |
2442 | * for the bytes counters (and not for the packets counters) */ | |
2443 | if (ip_fields[m].message_suffix) { | |
2444 | if (strextendf_with_separator(&message, ", ", "%s %s", | |
2445 | FORMAT_BYTES(value), ip_fields[m].message_suffix) < 0) | |
2446 | return log_oom(); | |
37109b85 | 2447 | |
37109b85 ZJS |
2448 | log_level = raise_level(log_level, |
2449 | value > MENTIONWORTHY_IP_BYTES, | |
2450 | value > NOTICEWORTHY_IP_BYTES); | |
82044702 | 2451 | } |
915b1d01 LP |
2452 | } |
2453 | ||
3e5b96ee MY |
2454 | /* This check is here because it is the earliest point following all possible log_level assignments. |
2455 | * (If log_level is assigned anywhere after this point, move this check.) */ | |
2456 | if (!unit_log_level_test(u, log_level)) | |
2457 | return 0; | |
2458 | ||
915b1d01 LP |
2459 | /* Is there any accounting data available at all? */ |
2460 | if (n_iovec == 0) { | |
3e5b96ee MY |
2461 | assert(!message); |
2462 | return 0; | |
915b1d01 LP |
2463 | } |
2464 | ||
3e5b96ee MY |
2465 | t = strjoin("MESSAGE=", u->id, ": ", message ?: "Completed", "."); |
2466 | if (!t) | |
2467 | return log_oom(); | |
2468 | iovec[n_iovec++] = IOVEC_MAKE_STRING(TAKE_PTR(t)); | |
915b1d01 | 2469 | |
3e5b96ee MY |
2470 | if (!set_iovec_string_field(iovec, &n_iovec, "MESSAGE_ID=", SD_MESSAGE_UNIT_RESOURCES_STR)) |
2471 | return log_oom(); | |
915b1d01 | 2472 | |
3e5b96ee MY |
2473 | if (!set_iovec_string_field(iovec, &n_iovec, u->manager->unit_log_field, u->id)) |
2474 | return log_oom(); | |
915b1d01 | 2475 | |
3e5b96ee MY |
2476 | if (!set_iovec_string_field(iovec, &n_iovec, u->manager->invocation_log_field, u->invocation_id_string)) |
2477 | return log_oom(); | |
915b1d01 | 2478 | |
3e5b96ee | 2479 | log_unit_struct_iovec(u, log_level, iovec, n_iovec); |
915b1d01 | 2480 | |
3e5b96ee | 2481 | return 0; |
915b1d01 LP |
2482 | } |
2483 | ||
adefcf28 LP |
2484 | static void unit_update_on_console(Unit *u) { |
2485 | bool b; | |
2486 | ||
2487 | assert(u); | |
2488 | ||
2489 | b = unit_needs_console(u); | |
2490 | if (u->on_console == b) | |
2491 | return; | |
2492 | ||
2493 | u->on_console = b; | |
2494 | if (b) | |
2495 | manager_ref_console(u->manager); | |
2496 | else | |
2497 | manager_unref_console(u->manager); | |
adefcf28 LP |
2498 | } |
2499 | ||
6eb65e7c LP |
2500 | static void unit_emit_audit_start(Unit *u) { |
2501 | assert(u); | |
2502 | ||
d52b8493 | 2503 | if (UNIT_VTABLE(u)->audit_start_message_type <= 0) |
6eb65e7c LP |
2504 | return; |
2505 | ||
2506 | /* Write audit record if we have just finished starting up */ | |
d52b8493 | 2507 | manager_send_unit_audit(u->manager, u, UNIT_VTABLE(u)->audit_start_message_type, /* success= */ true); |
6eb65e7c LP |
2508 | u->in_audit = true; |
2509 | } | |
2510 | ||
2511 | static void unit_emit_audit_stop(Unit *u, UnitActiveState state) { | |
2512 | assert(u); | |
2513 | ||
d52b8493 | 2514 | if (UNIT_VTABLE(u)->audit_start_message_type <= 0) |
6eb65e7c LP |
2515 | return; |
2516 | ||
2517 | if (u->in_audit) { | |
2518 | /* Write audit record if we have just finished shutting down */ | |
d52b8493 | 2519 | manager_send_unit_audit(u->manager, u, UNIT_VTABLE(u)->audit_stop_message_type, /* success= */ state == UNIT_INACTIVE); |
6eb65e7c LP |
2520 | u->in_audit = false; |
2521 | } else { | |
2522 | /* Hmm, if there was no start record written write it now, so that we always have a nice pair */ | |
d52b8493 | 2523 | manager_send_unit_audit(u->manager, u, UNIT_VTABLE(u)->audit_start_message_type, /* success= */ state == UNIT_INACTIVE); |
6eb65e7c LP |
2524 | |
2525 | if (state == UNIT_INACTIVE) | |
d52b8493 | 2526 | manager_send_unit_audit(u->manager, u, UNIT_VTABLE(u)->audit_stop_message_type, /* success= */ true); |
6eb65e7c LP |
2527 | } |
2528 | } | |
2529 | ||
96b09de5 | 2530 | static bool unit_process_job(Job *j, UnitActiveState ns, bool reload_success) { |
16c74914 | 2531 | bool unexpected = false; |
31cd5f63 | 2532 | JobResult result; |
16c74914 LP |
2533 | |
2534 | assert(j); | |
2535 | ||
2536 | if (j->state == JOB_WAITING) | |
16c74914 LP |
2537 | /* So we reached a different state for this job. Let's see if we can run it now if it failed previously |
2538 | * due to EAGAIN. */ | |
2539 | job_add_to_run_queue(j); | |
2540 | ||
2541 | /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and | |
2542 | * hence needs to invalidate jobs. */ | |
2543 | ||
2544 | switch (j->type) { | |
2545 | ||
2546 | case JOB_START: | |
2547 | case JOB_VERIFY_ACTIVE: | |
2548 | ||
2549 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
2550 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2551 | else if (j->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
2552 | unexpected = true; | |
2553 | ||
31cd5f63 AZ |
2554 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
2555 | if (ns == UNIT_FAILED) | |
2556 | result = JOB_FAILED; | |
31cd5f63 AZ |
2557 | else |
2558 | result = JOB_DONE; | |
2559 | ||
2560 | job_finish_and_invalidate(j, result, true, false); | |
2561 | } | |
16c74914 LP |
2562 | } |
2563 | ||
2564 | break; | |
2565 | ||
2566 | case JOB_RELOAD: | |
2567 | case JOB_RELOAD_OR_START: | |
2568 | case JOB_TRY_RELOAD: | |
2569 | ||
2570 | if (j->state == JOB_RUNNING) { | |
2571 | if (ns == UNIT_ACTIVE) | |
96b09de5 | 2572 | job_finish_and_invalidate(j, reload_success ? JOB_DONE : JOB_FAILED, true, false); |
16c74914 LP |
2573 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { |
2574 | unexpected = true; | |
2575 | ||
2576 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2577 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2578 | } | |
2579 | } | |
2580 | ||
2581 | break; | |
2582 | ||
2583 | case JOB_STOP: | |
2584 | case JOB_RESTART: | |
2585 | case JOB_TRY_RESTART: | |
2586 | ||
2587 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2588 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2589 | else if (j->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
2590 | unexpected = true; | |
2591 | job_finish_and_invalidate(j, JOB_FAILED, true, false); | |
2592 | } | |
2593 | ||
2594 | break; | |
2595 | ||
2596 | default: | |
04499a70 | 2597 | assert_not_reached(); |
16c74914 LP |
2598 | } |
2599 | ||
2600 | return unexpected; | |
2601 | } | |
2602 | ||
96b09de5 | 2603 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
429926e9 | 2604 | const char *reason; |
8559b3b7 | 2605 | Manager *m; |
a096ed36 | 2606 | |
87f0e418 LP |
2607 | assert(u); |
2608 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2609 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2610 | |
8559b3b7 LP |
2611 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2612 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2613 | * remounted this function will be called too! */ | |
87f0e418 | 2614 | |
546ac4f0 MS |
2615 | m = u->manager; |
2616 | ||
3c4832ad LP |
2617 | /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in |
2618 | * the bus queue, so that any job change signal queued will force out the unit change signal first. */ | |
2619 | unit_add_to_dbus_queue(u); | |
2620 | ||
e30bbc90 AZ |
2621 | /* Update systemd-oomd on the property/state change */ |
2622 | if (os != ns) { | |
2623 | /* Always send an update if the unit is going into an inactive state so systemd-oomd knows to stop | |
2624 | * monitoring. | |
2625 | * Also send an update whenever the unit goes active; this is to handle a case where an override file | |
2626 | * sets one of the ManagedOOM*= properties to "kill", then later removes it. systemd-oomd needs to | |
2627 | * know to stop monitoring when the unit changes from "kill" -> "auto" on daemon-reload, but we don't | |
2628 | * have the information on the property. Thus, indiscriminately send an update. */ | |
f561e8c6 | 2629 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) || UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
e30bbc90 AZ |
2630 | (void) manager_varlink_send_managed_oom_update(u); |
2631 | } | |
2632 | ||
f755e3b7 | 2633 | /* Update timestamps for state changes */ |
2c289ea8 | 2634 | if (!MANAGER_IS_RELOADING(m)) { |
fa5a0251 | 2635 | dual_timestamp_now(&u->state_change_timestamp); |
173e3821 | 2636 | |
bdbf9951 | 2637 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2638 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2639 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2640 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2641 | |
2642 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2643 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2644 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2645 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2646 | } |
87f0e418 | 2647 | |
865cc19a | 2648 | /* Keep track of failed units */ |
8724defe | 2649 | (void) manager_update_failed_units(m, u, ns == UNIT_FAILED); |
f755e3b7 | 2650 | |
d3070fbd LP |
2651 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2652 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
ff68472a ZJS |
2653 | SET_FLAG(u->markers, |
2654 | (1u << UNIT_MARKER_NEEDS_RELOAD)|(1u << UNIT_MARKER_NEEDS_RESTART), | |
2655 | false); | |
efdb0237 | 2656 | unit_prune_cgroup(u); |
d3070fbd | 2657 | unit_unlink_state_files(u); |
ff68472a ZJS |
2658 | } else if (ns != os && ns == UNIT_RELOADING) |
2659 | SET_FLAG(u->markers, 1u << UNIT_MARKER_NEEDS_RELOAD, false); | |
fb385181 | 2660 | |
adefcf28 | 2661 | unit_update_on_console(u); |
7ed9f6cd | 2662 | |
2c289ea8 | 2663 | if (!MANAGER_IS_RELOADING(m)) { |
a1c7334b LP |
2664 | bool unexpected; |
2665 | ||
2666 | /* Let's propagate state changes to the job */ | |
2667 | if (u->job) | |
96b09de5 | 2668 | unexpected = unit_process_job(u->job, ns, reload_success); |
a1c7334b LP |
2669 | else |
2670 | unexpected = true; | |
f3bff0eb | 2671 | |
a1c7334b LP |
2672 | /* If this state change happened without being requested by a job, then let's retroactively start or |
2673 | * stop dependencies. We skip that step when deserializing, since we don't want to create any | |
2674 | * additional jobs just because something is already activated. */ | |
bdbf9951 LP |
2675 | |
2676 | if (unexpected) { | |
2677 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2678 | retroactively_start_dependencies(u); | |
2679 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2680 | retroactively_stop_dependencies(u); | |
2681 | } | |
5de9682c | 2682 | |
bdbf9951 | 2683 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2684 | log_unit_debug(u, "Unit entered failed state."); |
49b34f75 | 2685 | unit_start_on_failure(u, "OnFailure=", UNIT_ATOM_ON_FAILURE, u->on_failure_job_mode); |
cd6d0a45 | 2686 | } |
e537352b | 2687 | |
256f65d0 LP |
2688 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns) && !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
2689 | /* This unit just finished starting up */ | |
3b2775c5 | 2690 | |
6eb65e7c | 2691 | unit_emit_audit_start(u); |
546ac4f0 | 2692 | manager_send_unit_plymouth(m, u); |
b2d6bb5b | 2693 | manager_send_unit_supervisor(m, u, /* active= */ true); |
256f65d0 | 2694 | } |
bdbf9951 | 2695 | |
256f65d0 | 2696 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && !UNIT_IS_INACTIVE_OR_FAILED(os)) { |
915b1d01 | 2697 | /* This unit just stopped/failed. */ |
256f65d0 | 2698 | |
6eb65e7c | 2699 | unit_emit_audit_stop(u, ns); |
b2d6bb5b | 2700 | manager_send_unit_supervisor(m, u, /* active= */ false); |
915b1d01 | 2701 | unit_log_resources(u); |
cd6d0a45 | 2702 | } |
294446dc | 2703 | |
49b34f75 | 2704 | if (ns == UNIT_INACTIVE && !IN_SET(os, UNIT_FAILED, UNIT_INACTIVE, UNIT_MAINTENANCE)) |
294446dc | 2705 | unit_start_on_failure(u, "OnSuccess=", UNIT_ATOM_ON_SUCCESS, u->on_success_job_mode); |
f278026d LP |
2706 | } |
2707 | ||
31dc1ca3 LP |
2708 | manager_recheck_journal(m); |
2709 | manager_recheck_dbus(m); | |
e63ebf71 | 2710 | |
3ecaa09b | 2711 | unit_trigger_notify(u); |
3b2775c5 | 2712 | |
8724defe | 2713 | if (!MANAGER_IS_RELOADING(m)) { |
429926e9 TR |
2714 | if (os != UNIT_FAILED && ns == UNIT_FAILED) { |
2715 | reason = strjoina("unit ", u->id, " failed"); | |
36c4dc08 | 2716 | emergency_action(m, u->failure_action, 0, u->reboot_arg, unit_failure_action_exit_status(u), reason); |
429926e9 TR |
2717 | } else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) { |
2718 | reason = strjoina("unit ", u->id, " succeeded"); | |
36c4dc08 | 2719 | emergency_action(m, u->success_action, 0, u->reboot_arg, unit_success_action_exit_status(u), reason); |
429926e9 | 2720 | } |
ff502445 LP |
2721 | } |
2722 | ||
99e9af25 | 2723 | /* And now, add the unit or depending units to various queues that will act on the new situation if |
48008c1c | 2724 | * needed. These queues generally check for continuous state changes rather than events (like most of |
99e9af25 LP |
2725 | * the state propagation above), and do work deferred instead of instantly, since they typically |
2726 | * don't want to run during reloading, and usually involve checking combined state of multiple units | |
2727 | * at once. */ | |
2728 | ||
2729 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
2730 | /* Stop unneeded units and bound-by units regardless if going down was expected or not */ | |
2731 | check_unneeded_dependencies(u); | |
2732 | check_bound_by_dependencies(u); | |
2733 | ||
2734 | /* Maybe someone wants us to remain up? */ | |
2735 | unit_submit_to_start_when_upheld_queue(u); | |
2736 | ||
2737 | /* Maybe the unit should be GC'ed now? */ | |
2738 | unit_add_to_gc_queue(u); | |
6ac62d61 LP |
2739 | |
2740 | /* Maybe we can release some resources now? */ | |
2741 | unit_submit_to_release_resources_queue(u); | |
99e9af25 LP |
2742 | } |
2743 | ||
2744 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
2745 | /* Start uphold units regardless if going up was expected or not */ | |
2746 | check_uphold_dependencies(u); | |
2747 | ||
2748 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ | |
2749 | unit_submit_to_stop_when_unneeded_queue(u); | |
2750 | ||
2751 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens | |
2752 | * when something BindsTo= to a Type=oneshot unit, as these units go directly from starting to | |
2753 | * inactive, without ever entering started.) */ | |
2754 | unit_submit_to_stop_when_bound_queue(u); | |
2755 | } | |
87f0e418 LP |
2756 | } |
2757 | ||
d70dfe1b | 2758 | int unit_watch_pidref(Unit *u, const PidRef *pid, bool exclusive) { |
495e75ed | 2759 | _cleanup_(pidref_freep) PidRef *pid_dup = NULL; |
62a76913 | 2760 | int r; |
a911bb9a | 2761 | |
495e75ed | 2762 | /* Adds a specific PID to the set of PIDs this unit watches. */ |
87f0e418 | 2763 | |
495e75ed LP |
2764 | assert(u); |
2765 | assert(pidref_is_set(pid)); | |
5ba6985b | 2766 | |
f75f613d FB |
2767 | /* Caller might be sure that this PID belongs to this unit only. Let's take this |
2768 | * opportunity to remove any stalled references to this PID as they can be created | |
2769 | * easily (when watching a process which is not our direct child). */ | |
2770 | if (exclusive) | |
495e75ed LP |
2771 | manager_unwatch_pidref(u->manager, pid); |
2772 | ||
2773 | if (set_contains(u->pids, pid)) /* early exit if already being watched */ | |
2774 | return 0; | |
f75f613d | 2775 | |
495e75ed | 2776 | r = pidref_dup(pid, &pid_dup); |
5ba6985b LP |
2777 | if (r < 0) |
2778 | return r; | |
2779 | ||
495e75ed | 2780 | /* First, insert into the set of PIDs maintained by the unit */ |
4c8d5f02 | 2781 | r = set_ensure_put(&u->pids, &pidref_hash_ops_free, pid_dup); |
a911bb9a LP |
2782 | if (r < 0) |
2783 | return r; | |
2784 | ||
495e75ed | 2785 | pid = TAKE_PTR(pid_dup); /* continue with our copy now that we have installed it properly in our set */ |
05e343b7 | 2786 | |
495e75ed | 2787 | /* Second, insert it into the simple global table, see if that works */ |
4c8d5f02 | 2788 | r = hashmap_ensure_put(&u->manager->watch_pids, &pidref_hash_ops_free, pid, u); |
495e75ed LP |
2789 | if (r != -EEXIST) |
2790 | return r; | |
a911bb9a | 2791 | |
495e75ed LP |
2792 | /* OK, the key is already assigned to a different unit. That's fine, then add us via the second |
2793 | * hashmap that points to an array. */ | |
a911bb9a | 2794 | |
495e75ed LP |
2795 | PidRef *old_pid = NULL; |
2796 | Unit **array = hashmap_get2(u->manager->watch_pids_more, pid, (void**) &old_pid); | |
62a76913 | 2797 | |
495e75ed LP |
2798 | /* Count entries in array */ |
2799 | size_t n = 0; | |
2800 | for (; array && array[n]; n++) | |
2801 | ; | |
62a76913 | 2802 | |
495e75ed LP |
2803 | /* Allocate a new array */ |
2804 | _cleanup_free_ Unit **new_array = new(Unit*, n + 2); | |
2805 | if (!new_array) | |
2806 | return -ENOMEM; | |
62a76913 | 2807 | |
495e75ed LP |
2808 | /* Append us to the end */ |
2809 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2810 | new_array[n] = u; | |
2811 | new_array[n+1] = NULL; | |
62a76913 | 2812 | |
495e75ed | 2813 | /* Make sure the hashmap is allocated */ |
4c8d5f02 | 2814 | r = hashmap_ensure_allocated(&u->manager->watch_pids_more, &pidref_hash_ops_free); |
495e75ed | 2815 | if (r < 0) |
62a76913 LP |
2816 | return r; |
2817 | ||
495e75ed LP |
2818 | /* Add or replace the old array */ |
2819 | r = hashmap_replace(u->manager->watch_pids_more, old_pid ?: pid, new_array); | |
62a76913 LP |
2820 | if (r < 0) |
2821 | return r; | |
2822 | ||
495e75ed LP |
2823 | TAKE_PTR(new_array); /* Now part of the hash table */ |
2824 | free(array); /* Which means we can now delete the old version */ | |
62a76913 | 2825 | return 0; |
87f0e418 LP |
2826 | } |
2827 | ||
495e75ed LP |
2828 | int unit_watch_pid(Unit *u, pid_t pid, bool exclusive) { |
2829 | _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL; | |
2830 | int r; | |
62a76913 | 2831 | |
87f0e418 | 2832 | assert(u); |
62a76913 LP |
2833 | assert(pid_is_valid(pid)); |
2834 | ||
495e75ed LP |
2835 | r = pidref_set_pid(&pidref, pid); |
2836 | if (r < 0) | |
2837 | return r; | |
62a76913 | 2838 | |
495e75ed LP |
2839 | return unit_watch_pidref(u, &pidref, exclusive); |
2840 | } | |
12375b95 | 2841 | |
d70dfe1b | 2842 | void unit_unwatch_pidref(Unit *u, const PidRef *pid) { |
495e75ed LP |
2843 | assert(u); |
2844 | assert(pidref_is_set(pid)); | |
2845 | ||
2846 | /* Remove from the set we maintain for this unit. (And destroy the returned pid eventually) */ | |
2847 | _cleanup_(pidref_freep) PidRef *pid1 = set_remove(u->pids, pid); | |
2848 | if (!pid1) | |
2849 | return; /* Early exit if this PID was never watched by us */ | |
2850 | ||
2851 | /* First let's drop the unit from the simple hash table, if it is included there */ | |
2852 | PidRef *pid2 = NULL; | |
2853 | Unit *uu = hashmap_get2(u->manager->watch_pids, pid, (void**) &pid2); | |
2854 | ||
2855 | /* Quick validation: iff we are in the watch_pids table then the PidRef object must be the same as in our local pids set */ | |
2856 | assert((uu == u) == (pid1 == pid2)); | |
2857 | ||
2858 | if (uu == u) | |
2859 | /* OK, we are in the first table. Let's remove it there then, and we are done already. */ | |
1c2beeb0 | 2860 | assert_se(hashmap_remove_value(u->manager->watch_pids, pid2, uu)); |
495e75ed LP |
2861 | else { |
2862 | /* We weren't in the first table, then let's consult the 2nd table that points to an array */ | |
2863 | PidRef *pid3 = NULL; | |
2864 | Unit **array = hashmap_get2(u->manager->watch_pids_more, pid, (void**) &pid3); | |
2865 | ||
2866 | /* Let's iterate through the array, dropping our own entry */ | |
2867 | size_t m = 0, n = 0; | |
2868 | for (; array && array[n]; n++) | |
62a76913 LP |
2869 | if (array[n] != u) |
2870 | array[m++] = array[n]; | |
495e75ed LP |
2871 | if (n == m) |
2872 | return; /* Not there */ | |
2873 | ||
2874 | array[m] = NULL; /* set trailing NULL marker on the new end */ | |
62a76913 LP |
2875 | |
2876 | if (m == 0) { | |
2877 | /* The array is now empty, remove the entire entry */ | |
1c2beeb0 | 2878 | assert_se(hashmap_remove_value(u->manager->watch_pids_more, pid3, array)); |
62a76913 | 2879 | free(array); |
495e75ed LP |
2880 | } else { |
2881 | /* The array is not empty, but let's make sure the entry is not keyed by the PidRef | |
2882 | * we will delete, but by the PidRef object of the Unit that is now first in the | |
2883 | * array. */ | |
2884 | ||
2885 | PidRef *new_pid3 = ASSERT_PTR(set_get(array[0]->pids, pid)); | |
2886 | assert_se(hashmap_replace(u->manager->watch_pids_more, new_pid3, array) >= 0); | |
62a76913 LP |
2887 | } |
2888 | } | |
495e75ed | 2889 | } |
87f0e418 | 2890 | |
495e75ed LP |
2891 | void unit_unwatch_pid(Unit *u, pid_t pid) { |
2892 | return unit_unwatch_pidref(u, &PIDREF_MAKE_FROM_PID(pid)); | |
a911bb9a LP |
2893 | } |
2894 | ||
bd44e61b LP |
2895 | void unit_unwatch_all_pids(Unit *u) { |
2896 | assert(u); | |
2897 | ||
2898 | while (!set_isempty(u->pids)) | |
495e75ed | 2899 | unit_unwatch_pidref(u, set_first(u->pids)); |
bd44e61b | 2900 | |
efdb0237 | 2901 | u->pids = set_free(u->pids); |
a911bb9a LP |
2902 | } |
2903 | ||
ea1e0bf1 YW |
2904 | void unit_unwatch_pidref_done(Unit *u, PidRef *pidref) { |
2905 | assert(u); | |
2906 | ||
2907 | if (!pidref_is_set(pidref)) | |
2908 | return; | |
2909 | ||
2910 | unit_unwatch_pidref(u, pidref); | |
2911 | pidref_done(pidref); | |
2912 | } | |
2913 | ||
50be4f4a | 2914 | static void unit_tidy_watch_pids(Unit *u) { |
495e75ed | 2915 | PidRef *except1, *except2, *e; |
a911bb9a LP |
2916 | |
2917 | assert(u); | |
2918 | ||
2919 | /* Cleans dead PIDs from our list */ | |
2920 | ||
50be4f4a LP |
2921 | except1 = unit_main_pid(u); |
2922 | except2 = unit_control_pid(u); | |
2923 | ||
90e74a66 | 2924 | SET_FOREACH(e, u->pids) { |
495e75ed | 2925 | if (pidref_equal(except1, e) || pidref_equal(except2, e)) |
a911bb9a LP |
2926 | continue; |
2927 | ||
4d9f092b | 2928 | if (pidref_is_unwaited(e) <= 0) |
495e75ed | 2929 | unit_unwatch_pidref(u, e); |
a911bb9a | 2930 | } |
87f0e418 LP |
2931 | } |
2932 | ||
50be4f4a | 2933 | static int on_rewatch_pids_event(sd_event_source *s, void *userdata) { |
99534007 | 2934 | Unit *u = ASSERT_PTR(userdata); |
50be4f4a LP |
2935 | |
2936 | assert(s); | |
50be4f4a LP |
2937 | |
2938 | unit_tidy_watch_pids(u); | |
2939 | unit_watch_all_pids(u); | |
2940 | ||
2941 | /* If the PID set is empty now, then let's finish this off. */ | |
2942 | unit_synthesize_cgroup_empty_event(u); | |
2943 | ||
2944 | return 0; | |
2945 | } | |
2946 | ||
2947 | int unit_enqueue_rewatch_pids(Unit *u) { | |
2948 | int r; | |
2949 | ||
2950 | assert(u); | |
2951 | ||
9cc54544 LP |
2952 | CGroupRuntime *crt = unit_get_cgroup_runtime(u); |
2953 | if (!crt || !crt->cgroup_path) | |
50be4f4a LP |
2954 | return -ENOENT; |
2955 | ||
2956 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
2957 | if (r < 0) | |
2958 | return r; | |
2959 | if (r > 0) /* On unified we can use proper notifications */ | |
2960 | return 0; | |
2961 | ||
2962 | /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new | |
2963 | * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it | |
2964 | * involves issuing kill(pid, 0) on all processes we watch. */ | |
2965 | ||
2966 | if (!u->rewatch_pids_event_source) { | |
2967 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
2968 | ||
2969 | r = sd_event_add_defer(u->manager->event, &s, on_rewatch_pids_event, u); | |
2970 | if (r < 0) | |
2971 | return log_error_errno(r, "Failed to allocate event source for tidying watched PIDs: %m"); | |
2972 | ||
d42b61d2 | 2973 | r = sd_event_source_set_priority(s, EVENT_PRIORITY_REWATCH_PIDS); |
50be4f4a | 2974 | if (r < 0) |
28b77ab2 | 2975 | return log_error_errno(r, "Failed to adjust priority of event source for tidying watched PIDs: %m"); |
50be4f4a LP |
2976 | |
2977 | (void) sd_event_source_set_description(s, "tidy-watch-pids"); | |
2978 | ||
2979 | u->rewatch_pids_event_source = TAKE_PTR(s); | |
2980 | } | |
2981 | ||
2982 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_ONESHOT); | |
2983 | if (r < 0) | |
2984 | return log_error_errno(r, "Failed to enable event source for tidying watched PIDs: %m"); | |
2985 | ||
2986 | return 0; | |
2987 | } | |
2988 | ||
2989 | void unit_dequeue_rewatch_pids(Unit *u) { | |
2990 | int r; | |
2991 | assert(u); | |
2992 | ||
2993 | if (!u->rewatch_pids_event_source) | |
2994 | return; | |
2995 | ||
2996 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_OFF); | |
2997 | if (r < 0) | |
2998 | log_warning_errno(r, "Failed to disable event source for tidying watched PIDs, ignoring: %m"); | |
2999 | ||
5dcadb4c | 3000 | u->rewatch_pids_event_source = sd_event_source_disable_unref(u->rewatch_pids_event_source); |
50be4f4a LP |
3001 | } |
3002 | ||
87f0e418 LP |
3003 | bool unit_job_is_applicable(Unit *u, JobType j) { |
3004 | assert(u); | |
3005 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
3006 | ||
3007 | switch (j) { | |
3008 | ||
3009 | case JOB_VERIFY_ACTIVE: | |
3010 | case JOB_START: | |
e0209d83 | 3011 | case JOB_NOP: |
f5869324 | 3012 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
86b52a39 | 3013 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueuing |
f5869324 | 3014 | * jobs for it. */ |
87f0e418 LP |
3015 | return true; |
3016 | ||
f5869324 LP |
3017 | case JOB_STOP: |
3018 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
86b52a39 | 3019 | * external events), hence it makes no sense to permit enqueuing such a request either. */ |
f5869324 LP |
3020 | return !u->perpetual; |
3021 | ||
87f0e418 LP |
3022 | case JOB_RESTART: |
3023 | case JOB_TRY_RESTART: | |
f5869324 | 3024 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
3025 | |
3026 | case JOB_RELOAD: | |
3282591d | 3027 | case JOB_TRY_RELOAD: |
87f0e418 LP |
3028 | return unit_can_reload(u); |
3029 | ||
3030 | case JOB_RELOAD_OR_START: | |
3031 | return unit_can_reload(u) && unit_can_start(u); | |
3032 | ||
3033 | default: | |
04499a70 | 3034 | assert_not_reached(); |
87f0e418 LP |
3035 | } |
3036 | } | |
3037 | ||
83110824 YW |
3038 | static Hashmap *unit_get_dependency_hashmap_per_type(Unit *u, UnitDependency d) { |
3039 | Hashmap *deps; | |
3040 | ||
3041 | assert(u); | |
3042 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
3043 | ||
3044 | deps = hashmap_get(u->dependencies, UNIT_DEPENDENCY_TO_PTR(d)); | |
3045 | if (!deps) { | |
3046 | _cleanup_hashmap_free_ Hashmap *h = NULL; | |
3047 | ||
3048 | h = hashmap_new(NULL); | |
3049 | if (!h) | |
3050 | return NULL; | |
3051 | ||
3052 | if (hashmap_ensure_put(&u->dependencies, NULL, UNIT_DEPENDENCY_TO_PTR(d), h) < 0) | |
3053 | return NULL; | |
3054 | ||
3055 | deps = TAKE_PTR(h); | |
3056 | } | |
3057 | ||
3058 | return deps; | |
3059 | } | |
3060 | ||
3061 | typedef enum NotifyDependencyFlags { | |
3062 | NOTIFY_DEPENDENCY_UPDATE_FROM = 1 << 0, | |
3063 | NOTIFY_DEPENDENCY_UPDATE_TO = 1 << 1, | |
3064 | } NotifyDependencyFlags; | |
3065 | ||
3066 | static int unit_add_dependency_impl( | |
eef85c4a LP |
3067 | Unit *u, |
3068 | UnitDependency d, | |
3069 | Unit *other, | |
eef85c4a | 3070 | UnitDependencyMask mask) { |
87f0e418 LP |
3071 | |
3072 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
fb138166 ZJS |
3073 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, |
3074 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, | |
3075 | [UNIT_WANTS] = UNIT_WANTED_BY, | |
3076 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, | |
3077 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, | |
3078 | [UNIT_UPHOLDS] = UNIT_UPHELD_BY, | |
3079 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, | |
3080 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, | |
3081 | [UNIT_WANTED_BY] = UNIT_WANTS, | |
3082 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, | |
3083 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, | |
3084 | [UNIT_UPHELD_BY] = UNIT_UPHOLDS, | |
3085 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, | |
3086 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
3087 | [UNIT_BEFORE] = UNIT_AFTER, | |
3088 | [UNIT_AFTER] = UNIT_BEFORE, | |
3089 | [UNIT_ON_SUCCESS] = UNIT_ON_SUCCESS_OF, | |
3090 | [UNIT_ON_SUCCESS_OF] = UNIT_ON_SUCCESS, | |
3091 | [UNIT_ON_FAILURE] = UNIT_ON_FAILURE_OF, | |
3092 | [UNIT_ON_FAILURE_OF] = UNIT_ON_FAILURE, | |
3093 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
3094 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, | |
3095 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, | |
85e9a101 | 3096 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
fb138166 ZJS |
3097 | [UNIT_PROPAGATES_STOP_TO] = UNIT_STOP_PROPAGATED_FROM, |
3098 | [UNIT_STOP_PROPAGATED_FROM] = UNIT_PROPAGATES_STOP_TO, | |
3099 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, /* symmetric! 👓 */ | |
3100 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, | |
3101 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, | |
3102 | [UNIT_IN_SLICE] = UNIT_SLICE_OF, | |
3103 | [UNIT_SLICE_OF] = UNIT_IN_SLICE, | |
87f0e418 | 3104 | }; |
83110824 YW |
3105 | |
3106 | Hashmap *u_deps, *other_deps; | |
3107 | UnitDependencyInfo u_info, u_info_old, other_info, other_info_old; | |
3108 | NotifyDependencyFlags flags = 0; | |
3109 | int r; | |
3110 | ||
3111 | assert(u); | |
3112 | assert(other); | |
3113 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
3114 | assert(inverse_table[d] >= 0 && inverse_table[d] < _UNIT_DEPENDENCY_MAX); | |
3115 | assert(mask > 0 && mask < _UNIT_DEPENDENCY_MASK_FULL); | |
3116 | ||
3117 | /* Ensure the following two hashmaps for each unit exist: | |
3118 | * - the top-level dependency hashmap that maps UnitDependency → Hashmap(Unit* → UnitDependencyInfo), | |
3119 | * - the inner hashmap, that maps Unit* → UnitDependencyInfo, for the specified dependency type. */ | |
3120 | u_deps = unit_get_dependency_hashmap_per_type(u, d); | |
3121 | if (!u_deps) | |
3122 | return -ENOMEM; | |
3123 | ||
3124 | other_deps = unit_get_dependency_hashmap_per_type(other, inverse_table[d]); | |
3125 | if (!other_deps) | |
3126 | return -ENOMEM; | |
3127 | ||
3128 | /* Save the original dependency info. */ | |
3129 | u_info.data = u_info_old.data = hashmap_get(u_deps, other); | |
3130 | other_info.data = other_info_old.data = hashmap_get(other_deps, u); | |
3131 | ||
3132 | /* Update dependency info. */ | |
3133 | u_info.origin_mask |= mask; | |
3134 | other_info.destination_mask |= mask; | |
3135 | ||
3136 | /* Save updated dependency info. */ | |
3137 | if (u_info.data != u_info_old.data) { | |
3138 | r = hashmap_replace(u_deps, other, u_info.data); | |
3139 | if (r < 0) | |
3140 | return r; | |
3141 | ||
3142 | flags = NOTIFY_DEPENDENCY_UPDATE_FROM; | |
3143 | } | |
3144 | ||
3145 | if (other_info.data != other_info_old.data) { | |
3146 | r = hashmap_replace(other_deps, u, other_info.data); | |
3147 | if (r < 0) { | |
3148 | if (u_info.data != u_info_old.data) { | |
3149 | /* Restore the old dependency. */ | |
3150 | if (u_info_old.data) | |
3151 | (void) hashmap_update(u_deps, other, u_info_old.data); | |
3152 | else | |
3153 | hashmap_remove(u_deps, other); | |
3154 | } | |
3155 | return r; | |
3156 | } | |
3157 | ||
3158 | flags |= NOTIFY_DEPENDENCY_UPDATE_TO; | |
3159 | } | |
3160 | ||
3161 | return flags; | |
3162 | } | |
3163 | ||
3164 | int unit_add_dependency( | |
3165 | Unit *u, | |
3166 | UnitDependency d, | |
3167 | Unit *other, | |
3168 | bool add_reference, | |
3169 | UnitDependencyMask mask) { | |
3170 | ||
15ed3c3a | 3171 | UnitDependencyAtom a; |
eef85c4a | 3172 | int r; |
15ed3c3a LP |
3173 | |
3174 | /* Helper to know whether sending a notification is necessary or not: if the dependency is already | |
3175 | * there, no need to notify! */ | |
83110824 | 3176 | NotifyDependencyFlags notify_flags; |
87f0e418 LP |
3177 | |
3178 | assert(u); | |
3179 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
3180 | assert(other); |
3181 | ||
9f151f29 LP |
3182 | u = unit_follow_merge(u); |
3183 | other = unit_follow_merge(other); | |
15ed3c3a LP |
3184 | a = unit_dependency_to_atom(d); |
3185 | assert(a >= 0); | |
9f151f29 | 3186 | |
15ed3c3a | 3187 | /* We won't allow dependencies on ourselves. We will not consider them an error however. */ |
d1fab3fe | 3188 | if (u == other) { |
ed991163 YW |
3189 | if (unit_should_warn_about_dependency(d)) |
3190 | log_unit_warning(u, "Dependency %s=%s is dropped.", | |
3191 | unit_dependency_to_string(d), u->id); | |
87f0e418 | 3192 | return 0; |
d1fab3fe | 3193 | } |
87f0e418 | 3194 | |
f14d6810 MG |
3195 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3196 | return 0; | |
3197 | ||
15ed3c3a LP |
3198 | /* Note that ordering a device unit after a unit is permitted since it allows to start its job |
3199 | * running timeout at a specific time. */ | |
3200 | if (FLAGS_SET(a, UNIT_ATOM_BEFORE) && other->type == UNIT_DEVICE) { | |
b862c257 | 3201 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
c80a9a33 LP |
3202 | return 0; |
3203 | } | |
3204 | ||
15ed3c3a | 3205 | if (FLAGS_SET(a, UNIT_ATOM_ON_FAILURE) && !UNIT_VTABLE(u)->can_fail) { |
c80a9a33 LP |
3206 | log_unit_warning(u, "Requested dependency OnFailure=%s ignored (%s units cannot fail).", other->id, unit_type_to_string(u->type)); |
3207 | return 0; | |
3208 | } | |
3209 | ||
15ed3c3a | 3210 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERS) && !UNIT_VTABLE(u)->can_trigger) |
c80a9a33 LP |
3211 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3212 | "Requested dependency Triggers=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(u->type)); | |
15ed3c3a | 3213 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERED_BY) && !UNIT_VTABLE(other)->can_trigger) |
c80a9a33 LP |
3214 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3215 | "Requested dependency TriggeredBy=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(other->type)); | |
3216 | ||
d219a2b0 LP |
3217 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && other->type != UNIT_SLICE) |
3218 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3219 | "Requested dependency Slice=%s refused (%s is not a slice unit).", other->id, other->id); | |
3220 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && u->type != UNIT_SLICE) | |
3221 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3222 | "Requested dependency SliceOf=%s refused (%s is not a slice unit).", other->id, u->id); | |
3223 | ||
3224 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && !UNIT_HAS_CGROUP_CONTEXT(u)) | |
3225 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3226 | "Requested dependency Slice=%s refused (%s is not a cgroup unit).", other->id, u->id); | |
3227 | ||
3228 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && !UNIT_HAS_CGROUP_CONTEXT(other)) | |
3229 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3230 | "Requested dependency SliceOf=%s refused (%s is not a cgroup unit).", other->id, other->id); | |
3231 | ||
83110824 | 3232 | r = unit_add_dependency_impl(u, d, other, mask); |
613b411c | 3233 | if (r < 0) |
87f0e418 | 3234 | return r; |
83110824 | 3235 | notify_flags = r; |
613b411c LP |
3236 | |
3237 | if (add_reference) { | |
83110824 | 3238 | r = unit_add_dependency_impl(u, UNIT_REFERENCES, other, mask); |
613b411c | 3239 | if (r < 0) |
701cc384 | 3240 | return r; |
83110824 | 3241 | notify_flags |= r; |
613b411c | 3242 | } |
87f0e418 | 3243 | |
83110824 | 3244 | if (FLAGS_SET(notify_flags, NOTIFY_DEPENDENCY_UPDATE_FROM)) |
5177cb0a | 3245 | unit_add_to_dbus_queue(u); |
83110824 | 3246 | if (FLAGS_SET(notify_flags, NOTIFY_DEPENDENCY_UPDATE_TO)) |
ac17080c | 3247 | unit_add_to_dbus_queue(other); |
15ed3c3a | 3248 | |
83110824 | 3249 | return notify_flags != 0; |
87f0e418 | 3250 | } |
0301abf4 | 3251 | |
eef85c4a | 3252 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
5ee8e988 | 3253 | int r = 0, s = 0; |
2c966c03 LP |
3254 | |
3255 | assert(u); | |
5ee8e988 | 3256 | assert(d >= 0 || e >= 0); |
2c966c03 | 3257 | |
5ee8e988 LB |
3258 | if (d >= 0) { |
3259 | r = unit_add_dependency(u, d, other, add_reference, mask); | |
3260 | if (r < 0) | |
3261 | return r; | |
3262 | } | |
2c966c03 | 3263 | |
5ee8e988 LB |
3264 | if (e >= 0) { |
3265 | s = unit_add_dependency(u, e, other, add_reference, mask); | |
3266 | if (s < 0) | |
3267 | return s; | |
3268 | } | |
a8c5a4c6 YW |
3269 | |
3270 | return r > 0 || s > 0; | |
2c966c03 LP |
3271 | } |
3272 | ||
23e8c796 | 3273 | static int resolve_template(Unit *u, const char *name, char **buf, const char **ret) { |
7410616c | 3274 | int r; |
9e2f7c11 LP |
3275 | |
3276 | assert(u); | |
23e8c796 | 3277 | assert(name); |
7410616c LP |
3278 | assert(buf); |
3279 | assert(ret); | |
9e2f7c11 | 3280 | |
7410616c LP |
3281 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
3282 | *buf = NULL; | |
3283 | *ret = name; | |
3284 | return 0; | |
9e2f7c11 LP |
3285 | } |
3286 | ||
ac155bb8 | 3287 | if (u->instance) |
7410616c | 3288 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 3289 | else { |
ae018d9b | 3290 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 3291 | |
7410616c LP |
3292 | r = unit_name_to_prefix(u->id, &i); |
3293 | if (r < 0) | |
3294 | return r; | |
9e2f7c11 | 3295 | |
7410616c | 3296 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 3297 | } |
7410616c LP |
3298 | if (r < 0) |
3299 | return r; | |
9e2f7c11 | 3300 | |
7410616c LP |
3301 | *ret = *buf; |
3302 | return 0; | |
9e2f7c11 LP |
3303 | } |
3304 | ||
35d8c19a | 3305 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3306 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
3307 | Unit *other; |
3308 | int r; | |
3309 | ||
9e2f7c11 | 3310 | assert(u); |
35d8c19a | 3311 | assert(name); |
09b6b09f | 3312 | |
23e8c796 | 3313 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3314 | if (r < 0) |
3315 | return r; | |
09b6b09f | 3316 | |
f14d6810 MG |
3317 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3318 | return 0; | |
3319 | ||
35d8c19a | 3320 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
8afbb8e1 LP |
3321 | if (r < 0) |
3322 | return r; | |
9e2f7c11 | 3323 | |
eef85c4a | 3324 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
3325 | } |
3326 | ||
5a724170 | 3327 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3328 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
3329 | Unit *other; |
3330 | int r; | |
2c966c03 LP |
3331 | |
3332 | assert(u); | |
5a724170 | 3333 | assert(name); |
2c966c03 | 3334 | |
23e8c796 | 3335 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3336 | if (r < 0) |
3337 | return r; | |
2c966c03 | 3338 | |
f14d6810 MG |
3339 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3340 | return 0; | |
3341 | ||
5a724170 | 3342 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
3f3cc397 | 3343 | if (r < 0) |
68eda4bd | 3344 | return r; |
2c966c03 | 3345 | |
eef85c4a | 3346 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
3347 | } |
3348 | ||
0301abf4 | 3349 | int set_unit_path(const char *p) { |
0301abf4 | 3350 | /* This is mostly for debug purposes */ |
7c248223 | 3351 | return RET_NERRNO(setenv("SYSTEMD_UNIT_PATH", p, 1)); |
0301abf4 | 3352 | } |
88066b3a | 3353 | |
ea430986 | 3354 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
3355 | assert(u); |
3356 | ||
ac155bb8 | 3357 | if (!u->id) |
04ade7d2 LP |
3358 | return NULL; |
3359 | ||
48899192 | 3360 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
3361 | } |
3362 | ||
4b58153d LP |
3363 | char *unit_dbus_path_invocation_id(Unit *u) { |
3364 | assert(u); | |
3365 | ||
3366 | if (sd_id128_is_null(u->invocation_id)) | |
3367 | return NULL; | |
3368 | ||
3369 | return unit_dbus_path_from_name(u->invocation_id_string); | |
3370 | } | |
3371 | ||
2d3b784d | 3372 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { |
db868d45 ZJS |
3373 | int r; |
3374 | ||
3375 | assert(u); | |
3376 | ||
3377 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
3378 | ||
3379 | if (sd_id128_equal(u->invocation_id, id)) | |
3380 | return 0; | |
3381 | ||
3382 | if (!sd_id128_is_null(u->invocation_id)) | |
3383 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3384 | ||
3385 | if (sd_id128_is_null(id)) { | |
3386 | r = 0; | |
3387 | goto reset; | |
3388 | } | |
3389 | ||
3390 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
3391 | if (r < 0) | |
3392 | goto reset; | |
3393 | ||
3394 | u->invocation_id = id; | |
3395 | sd_id128_to_string(id, u->invocation_id_string); | |
3396 | ||
3397 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3398 | if (r < 0) | |
3399 | goto reset; | |
3400 | ||
3401 | return 0; | |
3402 | ||
3403 | reset: | |
3404 | u->invocation_id = SD_ID128_NULL; | |
3405 | u->invocation_id_string[0] = 0; | |
3406 | return r; | |
3407 | } | |
3408 | ||
899acf5c | 3409 | int unit_set_slice(Unit *u, Unit *slice) { |
d219a2b0 LP |
3410 | int r; |
3411 | ||
d79200e2 LP |
3412 | assert(u); |
3413 | assert(slice); | |
3414 | ||
d219a2b0 LP |
3415 | /* Sets the unit slice if it has not been set before. Is extra careful, to only allow this for units |
3416 | * that actually have a cgroup context. Also, we don't allow to set this for slices (since the parent | |
3417 | * slice is derived from the name). Make sure the unit we set is actually a slice. */ | |
d79200e2 LP |
3418 | |
3419 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3420 | return -EOPNOTSUPP; | |
3421 | ||
3422 | if (u->type == UNIT_SLICE) | |
3423 | return -EINVAL; | |
3424 | ||
102ef982 LP |
3425 | if (unit_active_state(u) != UNIT_INACTIVE) |
3426 | return -EBUSY; | |
3427 | ||
d79200e2 LP |
3428 | if (slice->type != UNIT_SLICE) |
3429 | return -EINVAL; | |
3430 | ||
efdb0237 LP |
3431 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
3432 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
3433 | return -EPERM; | |
3434 | ||
12f64221 | 3435 | if (UNIT_GET_SLICE(u) == slice) |
d79200e2 LP |
3436 | return 0; |
3437 | ||
99e66921 | 3438 | /* Disallow slice changes if @u is already bound to cgroups */ |
9cc54544 LP |
3439 | if (UNIT_GET_SLICE(u)) { |
3440 | CGroupRuntime *crt = unit_get_cgroup_runtime(u); | |
3441 | if (crt && crt->cgroup_realized) | |
3442 | return -EBUSY; | |
3443 | } | |
d79200e2 | 3444 | |
899acf5c AZ |
3445 | /* Remove any slices assigned prior; we should only have one UNIT_IN_SLICE dependency */ |
3446 | if (UNIT_GET_SLICE(u)) | |
3447 | unit_remove_dependencies(u, UNIT_DEPENDENCY_SLICE_PROPERTY); | |
3448 | ||
3449 | r = unit_add_dependency(u, UNIT_IN_SLICE, slice, true, UNIT_DEPENDENCY_SLICE_PROPERTY); | |
d219a2b0 LP |
3450 | if (r < 0) |
3451 | return r; | |
3452 | ||
d79200e2 LP |
3453 | return 1; |
3454 | } | |
3455 | ||
3456 | int unit_set_default_slice(Unit *u) { | |
a8833944 | 3457 | const char *slice_name; |
a016b922 LP |
3458 | Unit *slice; |
3459 | int r; | |
3460 | ||
3461 | assert(u); | |
3462 | ||
f14d6810 MG |
3463 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3464 | return 0; | |
3465 | ||
12f64221 | 3466 | if (UNIT_GET_SLICE(u)) |
a016b922 LP |
3467 | return 0; |
3468 | ||
a8833944 LP |
3469 | if (u->instance) { |
3470 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 3471 | |
a8833944 LP |
3472 | /* Implicitly place all instantiated units in their |
3473 | * own per-template slice */ | |
3474 | ||
7410616c LP |
3475 | r = unit_name_to_prefix(u->id, &prefix); |
3476 | if (r < 0) | |
3477 | return r; | |
a8833944 LP |
3478 | |
3479 | /* The prefix is already escaped, but it might include | |
3480 | * "-" which has a special meaning for slice units, | |
3481 | * hence escape it here extra. */ | |
7410616c | 3482 | escaped = unit_name_escape(prefix); |
a8833944 LP |
3483 | if (!escaped) |
3484 | return -ENOMEM; | |
3485 | ||
463d0d15 | 3486 | if (MANAGER_IS_SYSTEM(u->manager)) |
00e7b3c8 | 3487 | slice_name = strjoina("system-", escaped, ".slice"); |
a8833944 | 3488 | else |
7f3b86a4 | 3489 | slice_name = strjoina("app-", escaped, ".slice"); |
5ee24fa0 ZJS |
3490 | |
3491 | } else if (unit_is_extrinsic(u)) | |
3492 | /* Keep all extrinsic units (e.g. perpetual units and swap and mount units in user mode) in | |
3493 | * the root slice. They don't really belong in one of the subslices. */ | |
3494 | slice_name = SPECIAL_ROOT_SLICE; | |
3495 | ||
3496 | else if (MANAGER_IS_SYSTEM(u->manager)) | |
3497 | slice_name = SPECIAL_SYSTEM_SLICE; | |
3498 | else | |
3499 | slice_name = SPECIAL_APP_SLICE; | |
a8833944 LP |
3500 | |
3501 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
3502 | if (r < 0) |
3503 | return r; | |
3504 | ||
899acf5c | 3505 | return unit_set_slice(u, slice); |
a016b922 LP |
3506 | } |
3507 | ||
9444b1f2 | 3508 | const char *unit_slice_name(Unit *u) { |
12f64221 | 3509 | Unit *slice; |
9444b1f2 LP |
3510 | assert(u); |
3511 | ||
12f64221 LP |
3512 | slice = UNIT_GET_SLICE(u); |
3513 | if (!slice) | |
9444b1f2 LP |
3514 | return NULL; |
3515 | ||
12f64221 | 3516 | return slice->id; |
9444b1f2 LP |
3517 | } |
3518 | ||
f6ff8c29 | 3519 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 3520 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
3521 | int r; |
3522 | ||
3523 | assert(u); | |
3524 | assert(type); | |
3525 | assert(_found); | |
3526 | ||
7410616c LP |
3527 | r = unit_name_change_suffix(u->id, type, &t); |
3528 | if (r < 0) | |
3529 | return r; | |
3530 | if (unit_has_name(u, t)) | |
3531 | return -EINVAL; | |
f6ff8c29 | 3532 | |
ac155bb8 | 3533 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3534 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3535 | return r; |
3536 | } | |
3537 | ||
bbc29086 | 3538 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
fc67a943 | 3539 | const char *new_owner; |
99534007 | 3540 | Unit *u = ASSERT_PTR(userdata); |
bbc29086 DM |
3541 | int r; |
3542 | ||
3543 | assert(message); | |
bbc29086 | 3544 | |
fc67a943 | 3545 | r = sd_bus_message_read(message, "sss", NULL, NULL, &new_owner); |
bbc29086 DM |
3546 | if (r < 0) { |
3547 | bus_log_parse_error(r); | |
3548 | return 0; | |
3549 | } | |
3550 | ||
3551 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3552 | UNIT_VTABLE(u)->bus_name_owner_change(u, empty_to_null(new_owner)); |
a5a8776a MJ |
3553 | |
3554 | return 0; | |
3555 | } | |
3556 | ||
3557 | static int get_name_owner_handler(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
3558 | const sd_bus_error *e; | |
3559 | const char *new_owner; | |
99534007 | 3560 | Unit *u = ASSERT_PTR(userdata); |
a5a8776a MJ |
3561 | int r; |
3562 | ||
3563 | assert(message); | |
a5a8776a MJ |
3564 | |
3565 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); | |
3566 | ||
a5a8776a | 3567 | e = sd_bus_message_get_error(message); |
a5a8776a | 3568 | if (e) { |
91053fc9 | 3569 | if (!sd_bus_error_has_name(e, SD_BUS_ERROR_NAME_HAS_NO_OWNER)) { |
33322185 YW |
3570 | r = sd_bus_error_get_errno(e); |
3571 | log_unit_error_errno(u, r, | |
3572 | "Unexpected error response from GetNameOwner(): %s", | |
3573 | bus_error_message(e, r)); | |
3574 | } | |
a5a8776a | 3575 | |
fc67a943 LP |
3576 | new_owner = NULL; |
3577 | } else { | |
3578 | r = sd_bus_message_read(message, "s", &new_owner); | |
3579 | if (r < 0) | |
3580 | return bus_log_parse_error(r); | |
a5a8776a | 3581 | |
fc67a943 LP |
3582 | assert(!isempty(new_owner)); |
3583 | } | |
a5a8776a MJ |
3584 | |
3585 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3586 | UNIT_VTABLE(u)->bus_name_owner_change(u, new_owner); |
bbc29086 DM |
3587 | |
3588 | return 0; | |
3589 | } | |
3590 | ||
9806e87d | 3591 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
8df433d7 | 3592 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
9806e87d | 3593 | const char *match; |
8df433d7 | 3594 | usec_t timeout_usec = 0; |
a5b07847 | 3595 | int r; |
bbc29086 | 3596 | |
9806e87d LP |
3597 | assert(u); |
3598 | assert(bus); | |
3599 | assert(name); | |
bbc29086 | 3600 | |
a5b07847 | 3601 | if (u->match_bus_slot || u->get_name_owner_slot) |
bbc29086 DM |
3602 | return -EBUSY; |
3603 | ||
8df433d7 | 3604 | /* NameOwnerChanged and GetNameOwner is used to detect when a service finished starting up. The dbus |
3605 | * call timeout shouldn't be earlier than that. If we couldn't get the start timeout, use the default | |
3606 | * value defined above. */ | |
3607 | if (UNIT_VTABLE(u)->get_timeout_start_usec) | |
3608 | timeout_usec = UNIT_VTABLE(u)->get_timeout_start_usec(u); | |
3609 | ||
9806e87d | 3610 | match = strjoina("type='signal'," |
81d62103 ZJS |
3611 | "sender='org.freedesktop.DBus'," |
3612 | "path='/org/freedesktop/DBus'," | |
3613 | "interface='org.freedesktop.DBus'," | |
3614 | "member='NameOwnerChanged'," | |
3615 | "arg0='", name, "'"); | |
bbc29086 | 3616 | |
8df433d7 | 3617 | r = bus_add_match_full( |
3618 | bus, | |
3619 | &u->match_bus_slot, | |
3620 | true, | |
3621 | match, | |
3622 | signal_name_owner_changed, | |
3623 | NULL, | |
3624 | u, | |
3625 | timeout_usec); | |
a5a8776a MJ |
3626 | if (r < 0) |
3627 | return r; | |
3628 | ||
8df433d7 | 3629 | r = sd_bus_message_new_method_call( |
a5b07847 | 3630 | bus, |
8df433d7 | 3631 | &m, |
a5b07847 LP |
3632 | "org.freedesktop.DBus", |
3633 | "/org/freedesktop/DBus", | |
3634 | "org.freedesktop.DBus", | |
8df433d7 | 3635 | "GetNameOwner"); |
3636 | if (r < 0) | |
3637 | return r; | |
3638 | ||
3639 | r = sd_bus_message_append(m, "s", name); | |
3640 | if (r < 0) | |
3641 | return r; | |
3642 | ||
3643 | r = sd_bus_call_async( | |
3644 | bus, | |
3645 | &u->get_name_owner_slot, | |
3646 | m, | |
a5b07847 LP |
3647 | get_name_owner_handler, |
3648 | u, | |
8df433d7 | 3649 | timeout_usec); |
3650 | ||
a5b07847 LP |
3651 | if (r < 0) { |
3652 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3653 | return r; | |
3654 | } | |
3655 | ||
3656 | log_unit_debug(u, "Watching D-Bus name '%s'.", name); | |
3657 | return 0; | |
bbc29086 DM |
3658 | } |
3659 | ||
05e343b7 | 3660 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3661 | int r; |
3662 | ||
05e343b7 LP |
3663 | assert(u); |
3664 | assert(name); | |
3665 | ||
3666 | /* Watch a specific name on the bus. We only support one unit | |
3667 | * watching each name for now. */ | |
3668 | ||
bbc29086 DM |
3669 | if (u->manager->api_bus) { |
3670 | /* If the bus is already available, install the match directly. | |
3671 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3672 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3673 | if (r < 0) |
8ea823b6 | 3674 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3675 | } |
3676 | ||
3677 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3678 | if (r < 0) { | |
3679 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
a5b07847 | 3680 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
bbc29086 DM |
3681 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); |
3682 | } | |
3683 | ||
3684 | return 0; | |
05e343b7 LP |
3685 | } |
3686 | ||
3687 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3688 | assert(u); | |
3689 | assert(name); | |
3690 | ||
8367fea5 | 3691 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3692 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
a5a8776a | 3693 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
05e343b7 LP |
3694 | } |
3695 | ||
d336ba9f | 3696 | int unit_add_node_dependency(Unit *u, const char *what, UnitDependency dep, UnitDependencyMask mask) { |
68eda4bd | 3697 | _cleanup_free_ char *e = NULL; |
44b0d1fd | 3698 | Unit *device; |
6e2ef85b LP |
3699 | int r; |
3700 | ||
3701 | assert(u); | |
3702 | ||
6e2ef85b | 3703 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3704 | if (isempty(what)) |
3705 | return 0; | |
6e2ef85b | 3706 | |
8407a5d0 | 3707 | if (!is_device_path(what)) |
6e2ef85b LP |
3708 | return 0; |
3709 | ||
44b0d1fd | 3710 | /* When device units aren't supported (such as in a container), don't create dependencies on them. */ |
1c2e9646 | 3711 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3712 | return 0; |
3713 | ||
7410616c LP |
3714 | r = unit_name_from_path(what, ".device", &e); |
3715 | if (r < 0) | |
3716 | return r; | |
6e2ef85b | 3717 | |
ac155bb8 | 3718 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3719 | if (r < 0) |
3720 | return r; | |
3721 | ||
ebc8968b FB |
3722 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3723 | dep = UNIT_BINDS_TO; | |
3724 | ||
d336ba9f FB |
3725 | return unit_add_two_dependencies(u, UNIT_AFTER, |
3726 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, | |
3727 | device, true, mask); | |
6e2ef85b | 3728 | } |
a16e1123 | 3729 | |
44b0d1fd LP |
3730 | int unit_add_blockdev_dependency(Unit *u, const char *what, UnitDependencyMask mask) { |
3731 | _cleanup_free_ char *escaped = NULL, *target = NULL; | |
3732 | int r; | |
3733 | ||
3734 | assert(u); | |
3735 | ||
3736 | if (isempty(what)) | |
3737 | return 0; | |
3738 | ||
3739 | if (!path_startswith(what, "/dev/")) | |
3740 | return 0; | |
3741 | ||
3742 | /* If we don't support devices, then also don't bother with blockdev@.target */ | |
3743 | if (!unit_type_supported(UNIT_DEVICE)) | |
3744 | return 0; | |
3745 | ||
3746 | r = unit_name_path_escape(what, &escaped); | |
3747 | if (r < 0) | |
3748 | return r; | |
3749 | ||
3750 | r = unit_name_build("blockdev", escaped, ".target", &target); | |
3751 | if (r < 0) | |
3752 | return r; | |
3753 | ||
3754 | return unit_add_dependency_by_name(u, UNIT_AFTER, target, true, mask); | |
3755 | } | |
3756 | ||
be847e82 | 3757 | int unit_coldplug(Unit *u) { |
95f74928 | 3758 | int r = 0; |
cca098b0 LP |
3759 | |
3760 | assert(u); | |
3761 | ||
f0831ed2 | 3762 | /* Make sure we don't enter a loop, when coldplugging recursively. */ |
f78f265f LP |
3763 | if (u->coldplugged) |
3764 | return 0; | |
3765 | ||
3766 | u->coldplugged = true; | |
3767 | ||
95f74928 MY |
3768 | STRV_FOREACH(i, u->deserialized_refs) |
3769 | RET_GATHER(r, bus_unit_track_add_name(u, *i)); | |
3770 | ||
05a98afd | 3771 | u->deserialized_refs = strv_free(u->deserialized_refs); |
cca098b0 | 3772 | |
95f74928 MY |
3773 | if (UNIT_VTABLE(u)->coldplug) |
3774 | RET_GATHER(r, UNIT_VTABLE(u)->coldplug(u)); | |
5a6158b6 | 3775 | |
95f74928 MY |
3776 | if (u->job) |
3777 | RET_GATHER(r, job_coldplug(u->job)); | |
3778 | if (u->nop_job) | |
3779 | RET_GATHER(r, job_coldplug(u->nop_job)); | |
cca098b0 | 3780 | |
49b6babb | 3781 | unit_modify_nft_set(u, /* add = */ true); |
05a98afd | 3782 | return r; |
cca098b0 LP |
3783 | } |
3784 | ||
f0831ed2 LP |
3785 | void unit_catchup(Unit *u) { |
3786 | assert(u); | |
3787 | ||
3788 | if (UNIT_VTABLE(u)->catchup) | |
3789 | UNIT_VTABLE(u)->catchup(u); | |
869f52f2 DS |
3790 | |
3791 | unit_cgroup_catchup(u); | |
f0831ed2 LP |
3792 | } |
3793 | ||
ba25d39e | 3794 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3795 | struct stat st; |
3796 | ||
3797 | if (!path) | |
3798 | return false; | |
3799 | ||
77969722 LP |
3800 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3801 | * are never out-of-date. */ | |
3802 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3803 | return false; | |
3804 | ||
21b95806 ZJS |
3805 | if (stat(path, &st) < 0) |
3806 | /* What, cannot access this anymore? */ | |
3807 | return true; | |
3808 | ||
ba25d39e ZJS |
3809 | if (path_masked) |
3810 | /* For masked files check if they are still so */ | |
3811 | return !null_or_empty(&st); | |
3812 | else | |
3a8db9fe | 3813 | /* For non-empty files check the mtime */ |
87ec20ef | 3814 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3815 | |
3816 | return false; | |
3817 | } | |
3818 | ||
45fb0699 | 3819 | bool unit_need_daemon_reload(Unit *u) { |
a82b8b3d | 3820 | _cleanup_strv_free_ char **dropins = NULL; |
1b64d026 | 3821 | |
45fb0699 | 3822 | assert(u); |
a82b8b3d MY |
3823 | assert(u->manager); |
3824 | ||
3825 | if (u->manager->unit_file_state_outdated) | |
3826 | return true; | |
45fb0699 | 3827 | |
ba25d39e ZJS |
3828 | /* For unit files, we allow masking… */ |
3829 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3830 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3831 | return true; |
5f4b19f4 | 3832 | |
ba25d39e ZJS |
3833 | /* Source paths should not be masked… */ |
3834 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3835 | return true; |
ae7a7182 | 3836 | |
19a44dfe | 3837 | if (u->load_state == UNIT_LOADED) |
a82b8b3d MY |
3838 | (void) unit_find_dropin_paths(u, &dropins); |
3839 | if (!strv_equal(u->dropin_paths, dropins)) | |
ab932a62 | 3840 | return true; |
6d10d308 | 3841 | |
ba25d39e | 3842 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3843 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3844 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3845 | return true; |
21b95806 | 3846 | |
ab932a62 | 3847 | return false; |
45fb0699 LP |
3848 | } |
3849 | ||
fdf20a31 | 3850 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3851 | assert(u); |
3852 | ||
fdf20a31 MM |
3853 | if (UNIT_VTABLE(u)->reset_failed) |
3854 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 | 3855 | |
7bf081a1 | 3856 | ratelimit_reset(&u->start_ratelimit); |
6bf0f408 | 3857 | u->start_limit_hit = false; |
5632e374 LP |
3858 | } |
3859 | ||
a7f241db LP |
3860 | Unit *unit_following(Unit *u) { |
3861 | assert(u); | |
3862 | ||
3863 | if (UNIT_VTABLE(u)->following) | |
3864 | return UNIT_VTABLE(u)->following(u); | |
3865 | ||
3866 | return NULL; | |
3867 | } | |
3868 | ||
31afa0a4 | 3869 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3870 | assert(u); |
3871 | ||
31afa0a4 LP |
3872 | /* This call does check the current state of the unit. It's |
3873 | * hence useful to be called from state change calls of the | |
3874 | * unit itself, where the state isn't updated yet. This is | |
3875 | * different from unit_inactive_or_pending() which checks both | |
3876 | * the current state and for a queued job. */ | |
18ffdfda | 3877 | |
28a2dfe8 | 3878 | return unit_has_job_type(u, JOB_STOP); |
31afa0a4 LP |
3879 | } |
3880 | ||
3881 | bool unit_inactive_or_pending(Unit *u) { | |
3882 | assert(u); | |
3883 | ||
3884 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3885 | |
d956ac29 LP |
3886 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3887 | return true; | |
3888 | ||
31afa0a4 | 3889 | if (unit_stop_pending(u)) |
18ffdfda LP |
3890 | return true; |
3891 | ||
3892 | return false; | |
3893 | } | |
3894 | ||
31afa0a4 | 3895 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3896 | assert(u); |
3897 | ||
f60c2665 | 3898 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3899 | |
3900 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3901 | return true; | |
3902 | ||
ac155bb8 | 3903 | if (u->job && |
3742095b | 3904 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
3905 | return true; |
3906 | ||
3907 | return false; | |
3908 | } | |
3909 | ||
52a12341 YW |
3910 | bool unit_will_restart_default(Unit *u) { |
3911 | assert(u); | |
3912 | ||
28a2dfe8 | 3913 | return unit_has_job_type(u, JOB_START); |
52a12341 YW |
3914 | } |
3915 | ||
deb4e708 MK |
3916 | bool unit_will_restart(Unit *u) { |
3917 | assert(u); | |
3918 | ||
3919 | if (!UNIT_VTABLE(u)->will_restart) | |
3920 | return false; | |
3921 | ||
3922 | return UNIT_VTABLE(u)->will_restart(u); | |
3923 | } | |
3924 | ||
38c41427 NK |
3925 | void unit_notify_cgroup_oom(Unit *u, bool managed_oom) { |
3926 | assert(u); | |
3927 | ||
3928 | if (UNIT_VTABLE(u)->notify_cgroup_oom) | |
3929 | UNIT_VTABLE(u)->notify_cgroup_oom(u, managed_oom); | |
3930 | } | |
3931 | ||
ae6a9e65 | 3932 | static int unit_pid_set(Unit *u, Set **pid_set) { |
82659fd7 LP |
3933 | int r; |
3934 | ||
ae6a9e65 YW |
3935 | assert(u); |
3936 | assert(pid_set); | |
3937 | ||
3938 | set_clear(*pid_set); /* This updates input. */ | |
82659fd7 LP |
3939 | |
3940 | /* Exclude the main/control pids from being killed via the cgroup */ | |
82659fd7 | 3941 | |
ae6a9e65 | 3942 | PidRef *pid; |
2d708781 | 3943 | FOREACH_ARGUMENT(pid, unit_main_pid(u), unit_control_pid(u)) |
ae6a9e65 YW |
3944 | if (pidref_is_set(pid)) { |
3945 | r = set_ensure_put(pid_set, NULL, PID_TO_PTR(pid->pid)); | |
3946 | if (r < 0) | |
3947 | return r; | |
3948 | } | |
82659fd7 | 3949 | |
ae6a9e65 | 3950 | return 0; |
82659fd7 LP |
3951 | } |
3952 | ||
4d1b2df1 | 3953 | static int kill_common_log(const PidRef *pid, int signo, void *userdata) { |
d9911002 | 3954 | _cleanup_free_ char *comm = NULL; |
99534007 | 3955 | Unit *u = ASSERT_PTR(userdata); |
d9911002 | 3956 | |
4d1b2df1 LP |
3957 | (void) pidref_get_comm(pid, &comm); |
3958 | ||
d9911002 | 3959 | log_unit_info(u, "Sending signal SIG%s to process " PID_FMT " (%s) on client request.", |
4d1b2df1 | 3960 | signal_to_string(signo), pid->pid, strna(comm)); |
d9911002 LP |
3961 | |
3962 | return 1; | |
3963 | } | |
3964 | ||
37eb258e LP |
3965 | static int kill_or_sigqueue(PidRef* pidref, int signo, int code, int value) { |
3966 | assert(pidref_is_set(pidref)); | |
a721cd00 LP |
3967 | assert(SIGNAL_VALID(signo)); |
3968 | ||
3969 | switch (code) { | |
3970 | ||
3971 | case SI_USER: | |
37eb258e LP |
3972 | log_debug("Killing " PID_FMT " with signal SIG%s.", pidref->pid, signal_to_string(signo)); |
3973 | return pidref_kill(pidref, signo); | |
a721cd00 LP |
3974 | |
3975 | case SI_QUEUE: | |
37eb258e LP |
3976 | log_debug("Enqueuing value %i to " PID_FMT " on signal SIG%s.", value, pidref->pid, signal_to_string(signo)); |
3977 | return pidref_sigqueue(pidref, signo, value); | |
a721cd00 LP |
3978 | |
3979 | default: | |
3980 | assert_not_reached(); | |
3981 | } | |
3982 | } | |
3983 | ||
ec5e2a13 YW |
3984 | static int unit_kill_one( |
3985 | Unit *u, | |
3986 | PidRef *pidref, | |
3987 | const char *type, | |
3988 | int signo, | |
3989 | int code, | |
3990 | int value, | |
3991 | sd_bus_error *ret_error) { | |
3992 | ||
3993 | int r; | |
3994 | ||
3995 | assert(u); | |
3996 | assert(type); | |
3997 | ||
3998 | if (!pidref_is_set(pidref)) | |
3999 | return 0; | |
4000 | ||
4001 | _cleanup_free_ char *comm = NULL; | |
4002 | (void) pidref_get_comm(pidref, &comm); | |
4003 | ||
4004 | r = kill_or_sigqueue(pidref, signo, code, value); | |
4005 | if (r == -ESRCH) | |
4006 | return 0; | |
4007 | if (r < 0) { | |
4008 | /* Report this failure both to the logs and to the client */ | |
4009 | if (ret_error) | |
4010 | sd_bus_error_set_errnof( | |
4011 | ret_error, r, | |
4012 | "Failed to send signal SIG%s to %s process " PID_FMT " (%s): %m", | |
4013 | signal_to_string(signo), type, pidref->pid, strna(comm)); | |
4014 | ||
4015 | return log_unit_warning_errno( | |
4016 | u, r, | |
4017 | "Failed to send signal SIG%s to %s process " PID_FMT " (%s) on client request: %m", | |
4018 | signal_to_string(signo), type, pidref->pid, strna(comm)); | |
4019 | } | |
4020 | ||
4021 | log_unit_info(u, "Sent signal SIG%s to %s process " PID_FMT " (%s) on client request.", | |
4022 | signal_to_string(signo), type, pidref->pid, strna(comm)); | |
4023 | return 1; /* killed */ | |
4024 | } | |
4025 | ||
37eb258e | 4026 | int unit_kill( |
d91c34f2 LP |
4027 | Unit *u, |
4028 | KillWho who, | |
4029 | int signo, | |
a721cd00 LP |
4030 | int code, |
4031 | int value, | |
ec5e2a13 | 4032 | sd_bus_error *ret_error) { |
d91c34f2 | 4033 | |
37eb258e | 4034 | PidRef *main_pid, *control_pid; |
ac5e3a50 | 4035 | bool killed = false; |
a721cd00 | 4036 | int ret = 0, r; |
814cc562 | 4037 | |
8aff7ac4 LP |
4038 | /* This is the common implementation for explicit user-requested killing of unit processes, shared by |
4039 | * various unit types. Do not confuse with unit_kill_context(), which is what we use when we want to | |
4040 | * stop a service ourselves. */ | |
4041 | ||
a721cd00 LP |
4042 | assert(u); |
4043 | assert(who >= 0); | |
4044 | assert(who < _KILL_WHO_MAX); | |
4045 | assert(SIGNAL_VALID(signo)); | |
4046 | assert(IN_SET(code, SI_USER, SI_QUEUE)); | |
4047 | ||
37eb258e LP |
4048 | main_pid = unit_main_pid(u); |
4049 | control_pid = unit_control_pid(u); | |
4050 | ||
4051 | if (!UNIT_HAS_CGROUP_CONTEXT(u) && !main_pid && !control_pid) | |
ec5e2a13 | 4052 | return sd_bus_error_setf(ret_error, SD_BUS_ERROR_NOT_SUPPORTED, "Unit type does not support process killing."); |
37eb258e | 4053 | |
ac5e3a50 | 4054 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
37eb258e | 4055 | if (!main_pid) |
ec5e2a13 | 4056 | return sd_bus_error_setf(ret_error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
37eb258e | 4057 | if (!pidref_is_set(main_pid)) |
ec5e2a13 | 4058 | return sd_bus_error_set_const(ret_error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
4059 | } |
4060 | ||
ac5e3a50 | 4061 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
37eb258e | 4062 | if (!control_pid) |
ec5e2a13 | 4063 | return sd_bus_error_setf(ret_error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
37eb258e | 4064 | if (!pidref_is_set(control_pid)) |
ec5e2a13 | 4065 | return sd_bus_error_set_const(ret_error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
4066 | } |
4067 | ||
ec5e2a13 YW |
4068 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) { |
4069 | r = unit_kill_one(u, control_pid, "control", signo, code, value, ret_error); | |
4070 | RET_GATHER(ret, r); | |
4071 | killed = killed || r > 0; | |
a721cd00 | 4072 | } |
814cc562 | 4073 | |
ec5e2a13 YW |
4074 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) { |
4075 | r = unit_kill_one(u, main_pid, "main", signo, code, value, ret >= 0 ? ret_error : NULL); | |
4076 | RET_GATHER(ret, r); | |
4077 | killed = killed || r > 0; | |
a721cd00 | 4078 | } |
814cc562 | 4079 | |
a721cd00 LP |
4080 | /* Note: if we shall enqueue rather than kill we won't do this via the cgroup mechanism, since it |
4081 | * doesn't really make much sense (and given that enqueued values are a relatively expensive | |
4082 | * resource, and we shouldn't allow us to be subjects for such allocation sprees) */ | |
9cc54544 LP |
4083 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && code == SI_USER) { |
4084 | CGroupRuntime *crt = unit_get_cgroup_runtime(u); | |
814cc562 | 4085 | |
9cc54544 LP |
4086 | if (crt && crt->cgroup_path) { |
4087 | _cleanup_set_free_ Set *pid_set = NULL; | |
d9911002 | 4088 | |
9cc54544 LP |
4089 | /* Exclude the main/control pids from being killed via the cgroup */ |
4090 | r = unit_pid_set(u, &pid_set); | |
4091 | if (r < 0) | |
4092 | return log_oom(); | |
4093 | ||
4094 | r = cg_kill_recursive(crt->cgroup_path, signo, 0, pid_set, kill_common_log, u); | |
4095 | if (r < 0 && !IN_SET(r, -ESRCH, -ENOENT)) { | |
4096 | if (ret >= 0) | |
4097 | sd_bus_error_set_errnof( | |
4098 | ret_error, r, | |
4099 | "Failed to send signal SIG%s to auxiliary processes: %m", | |
4100 | signal_to_string(signo)); | |
4101 | ||
4102 | log_unit_warning_errno( | |
4103 | u, r, | |
4104 | "Failed to send signal SIG%s to auxiliary processes on client request: %m", | |
d9911002 | 4105 | signal_to_string(signo)); |
ec5e2a13 | 4106 | |
9cc54544 LP |
4107 | RET_GATHER(ret, r); |
4108 | } | |
ec5e2a13 | 4109 | |
9cc54544 | 4110 | killed = killed || r >= 0; |
ec5e2a13 | 4111 | } |
814cc562 MS |
4112 | } |
4113 | ||
2ae0508e | 4114 | /* If the "fail" versions of the operation are requested, then complain if the set of processes we killed is empty */ |
ec5e2a13 YW |
4115 | if (ret >= 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL, KILL_MAIN_FAIL)) |
4116 | return sd_bus_error_set_const(ret_error, BUS_ERROR_NO_SUCH_PROCESS, "No matching processes to kill"); | |
ac5e3a50 | 4117 | |
a721cd00 | 4118 | return ret; |
814cc562 MS |
4119 | } |
4120 | ||
6210e7fc LP |
4121 | int unit_following_set(Unit *u, Set **s) { |
4122 | assert(u); | |
4123 | assert(s); | |
4124 | ||
4125 | if (UNIT_VTABLE(u)->following_set) | |
4126 | return UNIT_VTABLE(u)->following_set(u, s); | |
4127 | ||
4128 | *s = NULL; | |
4129 | return 0; | |
4130 | } | |
4131 | ||
a4375746 | 4132 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
4133 | int r; |
4134 | ||
a4375746 LP |
4135 | assert(u); |
4136 | ||
0ec0deaa LP |
4137 | if (u->unit_file_state < 0 && u->fragment_path) { |
4138 | r = unit_file_get_state( | |
4870133b | 4139 | u->manager->runtime_scope, |
0ec0deaa | 4140 | NULL, |
9ea3a0e7 | 4141 | u->id, |
0ec0deaa LP |
4142 | &u->unit_file_state); |
4143 | if (r < 0) | |
4144 | u->unit_file_state = UNIT_FILE_BAD; | |
4145 | } | |
a4375746 | 4146 | |
ac155bb8 | 4147 | return u->unit_file_state; |
a4375746 LP |
4148 | } |
4149 | ||
e77e07f6 | 4150 | PresetAction unit_get_unit_file_preset(Unit *u) { |
a99626c1 LP |
4151 | int r; |
4152 | ||
d2dc52db LP |
4153 | assert(u); |
4154 | ||
a99626c1 LP |
4155 | if (u->unit_file_preset < 0 && u->fragment_path) { |
4156 | _cleanup_free_ char *bn = NULL; | |
4157 | ||
4158 | r = path_extract_filename(u->fragment_path, &bn); | |
4159 | if (r < 0) | |
4160 | return (u->unit_file_preset = r); | |
4161 | ||
4162 | if (r == O_DIRECTORY) | |
4163 | return (u->unit_file_preset = -EISDIR); | |
4164 | ||
d2dc52db | 4165 | u->unit_file_preset = unit_file_query_preset( |
4870133b | 4166 | u->manager->runtime_scope, |
0ec0deaa | 4167 | NULL, |
a99626c1 | 4168 | bn, |
8f7b2566 | 4169 | NULL); |
a99626c1 | 4170 | } |
d2dc52db LP |
4171 | |
4172 | return u->unit_file_preset; | |
4173 | } | |
4174 | ||
7f7d01ed | 4175 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 4176 | assert(ref); |
7f7d01ed ZJS |
4177 | assert(source); |
4178 | assert(target); | |
57020a3a | 4179 | |
7f7d01ed | 4180 | if (ref->target) |
57020a3a LP |
4181 | unit_ref_unset(ref); |
4182 | ||
7f7d01ed ZJS |
4183 | ref->source = source; |
4184 | ref->target = target; | |
4185 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
4186 | return target; | |
57020a3a LP |
4187 | } |
4188 | ||
4189 | void unit_ref_unset(UnitRef *ref) { | |
4190 | assert(ref); | |
4191 | ||
7f7d01ed | 4192 | if (!ref->target) |
57020a3a LP |
4193 | return; |
4194 | ||
b75102e5 LP |
4195 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
4196 | * be unreferenced now. */ | |
7f7d01ed | 4197 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 4198 | |
7f7d01ed ZJS |
4199 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
4200 | ref->source = ref->target = NULL; | |
57020a3a LP |
4201 | } |
4202 | ||
29206d46 LP |
4203 | static int user_from_unit_name(Unit *u, char **ret) { |
4204 | ||
4205 | static const uint8_t hash_key[] = { | |
4206 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
4207 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
4208 | }; | |
4209 | ||
4210 | _cleanup_free_ char *n = NULL; | |
4211 | int r; | |
4212 | ||
4213 | r = unit_name_to_prefix(u->id, &n); | |
4214 | if (r < 0) | |
4215 | return r; | |
4216 | ||
7a8867ab | 4217 | if (valid_user_group_name(n, 0)) { |
ae2a15bc | 4218 | *ret = TAKE_PTR(n); |
29206d46 LP |
4219 | return 0; |
4220 | } | |
4221 | ||
4222 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
4223 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
4224 | return -ENOMEM; | |
4225 | ||
4226 | return 0; | |
4227 | } | |
4228 | ||
598459ce LP |
4229 | int unit_patch_contexts(Unit *u) { |
4230 | CGroupContext *cc; | |
4231 | ExecContext *ec; | |
cba6e062 LP |
4232 | int r; |
4233 | ||
e06c73cc | 4234 | assert(u); |
e06c73cc | 4235 | |
598459ce LP |
4236 | /* Patch in the manager defaults into the exec and cgroup |
4237 | * contexts, _after_ the rest of the settings have been | |
4238 | * initialized */ | |
085afe36 | 4239 | |
598459ce LP |
4240 | ec = unit_get_exec_context(u); |
4241 | if (ec) { | |
4242 | /* This only copies in the ones that need memory */ | |
12375b95 | 4243 | for (unsigned i = 0; i < _RLIMIT_MAX; i++) |
c9e120e0 LP |
4244 | if (u->manager->defaults.rlimit[i] && !ec->rlimit[i]) { |
4245 | ec->rlimit[i] = newdup(struct rlimit, u->manager->defaults.rlimit[i], 1); | |
598459ce LP |
4246 | if (!ec->rlimit[i]) |
4247 | return -ENOMEM; | |
4248 | } | |
4249 | ||
463d0d15 | 4250 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4251 | !ec->working_directory) { |
4252 | ||
4253 | r = get_home_dir(&ec->working_directory); | |
4254 | if (r < 0) | |
4255 | return r; | |
4c08c824 LP |
4256 | |
4257 | /* Allow user services to run, even if the | |
4258 | * home directory is missing */ | |
4259 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4260 | } |
4261 | ||
598459ce | 4262 | if (ec->private_devices) |
2cd0a735 | 4263 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4264 | |
4265 | if (ec->protect_kernel_modules) | |
4266 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 | 4267 | |
84703040 KK |
4268 | if (ec->protect_kernel_logs) |
4269 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYSLOG); | |
4270 | ||
fc64760d KK |
4271 | if (ec->protect_clock) |
4272 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_SYS_TIME) | (UINT64_C(1) << CAP_WAKE_ALARM)); | |
4273 | ||
29206d46 LP |
4274 | if (ec->dynamic_user) { |
4275 | if (!ec->user) { | |
4276 | r = user_from_unit_name(u, &ec->user); | |
4277 | if (r < 0) | |
4278 | return r; | |
4279 | } | |
4280 | ||
4281 | if (!ec->group) { | |
4282 | ec->group = strdup(ec->user); | |
4283 | if (!ec->group) | |
4284 | return -ENOMEM; | |
4285 | } | |
4286 | ||
bf65b7e0 LP |
4287 | /* If the dynamic user option is on, let's make sure that the unit can't leave its |
4288 | * UID/GID around in the file system or on IPC objects. Hence enforce a strict | |
4289 | * sandbox. */ | |
63bb64a0 | 4290 | |
29206d46 | 4291 | ec->private_tmp = true; |
00d9ef85 | 4292 | ec->remove_ipc = true; |
63bb64a0 LP |
4293 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4294 | if (ec->protect_home == PROTECT_HOME_NO) | |
4295 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
bf65b7e0 LP |
4296 | |
4297 | /* Make sure this service can neither benefit from SUID/SGID binaries nor create | |
4298 | * them. */ | |
4299 | ec->no_new_privileges = true; | |
4300 | ec->restrict_suid_sgid = true; | |
29206d46 | 4301 | } |
a2ab603c YW |
4302 | |
4303 | for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) | |
4304 | exec_directory_sort(ec->directories + dt); | |
cba6e062 LP |
4305 | } |
4306 | ||
598459ce | 4307 | cc = unit_get_cgroup_context(u); |
fe65e88b | 4308 | if (cc && ec) { |
f513e420 | 4309 | |
fe65e88b | 4310 | if (ec->private_devices && |
084870f9 ZJS |
4311 | cc->device_policy == CGROUP_DEVICE_POLICY_AUTO) |
4312 | cc->device_policy = CGROUP_DEVICE_POLICY_CLOSED; | |
fe65e88b | 4313 | |
63857bf4 LB |
4314 | /* Only add these if needed, as they imply that everything else is blocked. */ |
4315 | if (cc->device_policy != CGROUP_DEVICE_POLICY_AUTO || cc->device_allow) { | |
4316 | if (ec->root_image || ec->mount_images) { | |
4317 | ||
4318 | /* When RootImage= or MountImages= is specified, the following devices are touched. */ | |
4319 | FOREACH_STRING(p, "/dev/loop-control", "/dev/mapper/control") { | |
a1044811 | 4320 | r = cgroup_context_add_device_allow(cc, p, CGROUP_DEVICE_READ|CGROUP_DEVICE_WRITE); |
63857bf4 LB |
4321 | if (r < 0) |
4322 | return r; | |
4323 | } | |
4324 | FOREACH_STRING(p, "block-loop", "block-blkext", "block-device-mapper") { | |
a1044811 | 4325 | r = cgroup_context_add_device_allow(cc, p, CGROUP_DEVICE_READ|CGROUP_DEVICE_WRITE|CGROUP_DEVICE_MKNOD); |
63857bf4 LB |
4326 | if (r < 0) |
4327 | return r; | |
4328 | } | |
fe65e88b | 4329 | |
63857bf4 LB |
4330 | /* Make sure "block-loop" can be resolved, i.e. make sure "loop" shows up in /proc/devices. |
4331 | * Same for mapper and verity. */ | |
4332 | FOREACH_STRING(p, "modprobe@loop.service", "modprobe@dm_mod.service", "modprobe@dm_verity.service") { | |
4333 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, p, true, UNIT_DEPENDENCY_FILE); | |
4334 | if (r < 0) | |
4335 | return r; | |
4336 | } | |
0cffae95 | 4337 | } |
867af728 | 4338 | |
63857bf4 | 4339 | if (ec->protect_clock) { |
a1044811 | 4340 | r = cgroup_context_add_device_allow(cc, "char-rtc", CGROUP_DEVICE_READ); |
0cffae95 LB |
4341 | if (r < 0) |
4342 | return r; | |
4343 | } | |
398dc7d3 LB |
4344 | |
4345 | /* If there are encrypted credentials we might need to access the TPM. */ | |
50a4217b | 4346 | if (exec_context_has_encrypted_credentials(ec)) { |
a1044811 | 4347 | r = cgroup_context_add_device_allow(cc, "char-tpm", CGROUP_DEVICE_READ|CGROUP_DEVICE_WRITE); |
d5902569 AD |
4348 | if (r < 0) |
4349 | return r; | |
4350 | } | |
fe65e88b | 4351 | } |
598459ce | 4352 | } |
f1660f96 | 4353 | |
cba6e062 | 4354 | return 0; |
e06c73cc LP |
4355 | } |
4356 | ||
c2503e35 | 4357 | ExecContext *unit_get_exec_context(const Unit *u) { |
3ef63c31 LP |
4358 | size_t offset; |
4359 | assert(u); | |
4360 | ||
598459ce LP |
4361 | if (u->type < 0) |
4362 | return NULL; | |
4363 | ||
3ef63c31 LP |
4364 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4365 | if (offset <= 0) | |
4366 | return NULL; | |
4367 | ||
4368 | return (ExecContext*) ((uint8_t*) u + offset); | |
4369 | } | |
4370 | ||
9cc54544 | 4371 | KillContext *unit_get_kill_context(const Unit *u) { |
718db961 LP |
4372 | size_t offset; |
4373 | assert(u); | |
4374 | ||
598459ce LP |
4375 | if (u->type < 0) |
4376 | return NULL; | |
4377 | ||
718db961 LP |
4378 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4379 | if (offset <= 0) | |
4380 | return NULL; | |
4381 | ||
4382 | return (KillContext*) ((uint8_t*) u + offset); | |
4383 | } | |
4384 | ||
9cc54544 | 4385 | CGroupContext *unit_get_cgroup_context(const Unit *u) { |
4ad49000 LP |
4386 | size_t offset; |
4387 | ||
598459ce LP |
4388 | if (u->type < 0) |
4389 | return NULL; | |
4390 | ||
4ad49000 LP |
4391 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4392 | if (offset <= 0) | |
4393 | return NULL; | |
4394 | ||
4395 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4396 | } | |
4397 | ||
9cc54544 | 4398 | ExecRuntime *unit_get_exec_runtime(const Unit *u) { |
613b411c LP |
4399 | size_t offset; |
4400 | ||
598459ce LP |
4401 | if (u->type < 0) |
4402 | return NULL; | |
4403 | ||
613b411c LP |
4404 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4405 | if (offset <= 0) | |
4406 | return NULL; | |
4407 | ||
28135da3 | 4408 | return *(ExecRuntime**) ((uint8_t*) u + offset); |
613b411c LP |
4409 | } |
4410 | ||
9cc54544 LP |
4411 | CGroupRuntime *unit_get_cgroup_runtime(const Unit *u) { |
4412 | size_t offset; | |
4413 | ||
4414 | if (u->type < 0) | |
4415 | return NULL; | |
4416 | ||
4417 | offset = UNIT_VTABLE(u)->cgroup_runtime_offset; | |
4418 | if (offset <= 0) | |
4419 | return NULL; | |
4420 | ||
4421 | return *(CGroupRuntime**) ((uint8_t*) u + offset); | |
4422 | } | |
4423 | ||
2e59b241 | 4424 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4425 | assert(u); |
4426 | ||
2e59b241 | 4427 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4428 | return NULL; |
4429 | ||
39591351 LP |
4430 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4431 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4432 | |
2e59b241 | 4433 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4434 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4435 | |
2e59b241 LP |
4436 | if (flags & UNIT_RUNTIME) |
4437 | return u->manager->lookup_paths.runtime_control; | |
4438 | ||
39591351 | 4439 | return NULL; |
71645aca LP |
4440 | } |
4441 | ||
68ecb48b ZJS |
4442 | const char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4443 | assert(s); | |
8c41640a | 4444 | assert(popcount(flags & (UNIT_ESCAPE_EXEC_SYNTAX_ENV | UNIT_ESCAPE_EXEC_SYNTAX | UNIT_ESCAPE_C)) <= 1); |
68ecb48b | 4445 | assert(buf); |
24536beb ZJS |
4446 | |
4447 | _cleanup_free_ char *t = NULL; | |
2e59b241 | 4448 | |
68ecb48b ZJS |
4449 | /* Returns a string with any escaping done. If no escaping was necessary, *buf is set to NULL, and |
4450 | * the input pointer is returned as-is. If an allocation was needed, the return buffer pointer is | |
4451 | * written to *buf. This means the return value always contains a properly escaped version, but *buf | |
4452 | * only contains a pointer if an allocation was made. Callers can use this to optimize memory | |
4453 | * allocations. */ | |
2e59b241 LP |
4454 | |
4455 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
24536beb ZJS |
4456 | t = specifier_escape(s); |
4457 | if (!t) | |
2e59b241 LP |
4458 | return NULL; |
4459 | ||
24536beb | 4460 | s = t; |
2e59b241 LP |
4461 | } |
4462 | ||
4a055e5a | 4463 | /* We either do C-escaping or shell-escaping, to additionally escape characters that we parse for |
e7416db1 | 4464 | * ExecStart= and friends, i.e. '$' and quotes. */ |
24536beb | 4465 | |
8c41640a | 4466 | if (flags & (UNIT_ESCAPE_EXEC_SYNTAX_ENV | UNIT_ESCAPE_EXEC_SYNTAX)) { |
e7416db1 ZJS |
4467 | char *t2; |
4468 | ||
8c41640a ZJS |
4469 | if (flags & UNIT_ESCAPE_EXEC_SYNTAX_ENV) { |
4470 | t2 = strreplace(s, "$", "$$"); | |
4471 | if (!t2) | |
4472 | return NULL; | |
4473 | free_and_replace(t, t2); | |
4474 | } | |
e7416db1 | 4475 | |
8c41640a | 4476 | t2 = shell_escape(t ?: s, "\""); |
24536beb ZJS |
4477 | if (!t2) |
4478 | return NULL; | |
4479 | free_and_replace(t, t2); | |
4480 | ||
4481 | s = t; | |
2e59b241 | 4482 | |
24536beb | 4483 | } else if (flags & UNIT_ESCAPE_C) { |
e7416db1 ZJS |
4484 | char *t2; |
4485 | ||
4486 | t2 = cescape(s); | |
24536beb | 4487 | if (!t2) |
2e59b241 | 4488 | return NULL; |
24536beb | 4489 | free_and_replace(t, t2); |
2e59b241 | 4490 | |
24536beb | 4491 | s = t; |
2e59b241 LP |
4492 | } |
4493 | ||
68ecb48b ZJS |
4494 | *buf = TAKE_PTR(t); |
4495 | return s; | |
2e59b241 LP |
4496 | } |
4497 | ||
4498 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4499 | _cleanup_free_ char *result = NULL; | |
319a4f4b | 4500 | size_t n = 0; |
2e59b241 | 4501 | |
24536beb ZJS |
4502 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command |
4503 | * lines in a way suitable for ExecStart= stanzas. */ | |
2e59b241 LP |
4504 | |
4505 | STRV_FOREACH(i, l) { | |
4506 | _cleanup_free_ char *buf = NULL; | |
4507 | const char *p; | |
4508 | size_t a; | |
4509 | char *q; | |
4510 | ||
4511 | p = unit_escape_setting(*i, flags, &buf); | |
4512 | if (!p) | |
4513 | return NULL; | |
4514 | ||
4515 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
319a4f4b | 4516 | if (!GREEDY_REALLOC(result, n + a + 1)) |
2e59b241 LP |
4517 | return NULL; |
4518 | ||
4519 | q = result + n; | |
4520 | if (n > 0) | |
4521 | *(q++) = ' '; | |
4522 | ||
4523 | *(q++) = '"'; | |
4524 | q = stpcpy(q, p); | |
4525 | *(q++) = '"'; | |
4526 | ||
4527 | n += a; | |
4528 | } | |
4529 | ||
319a4f4b | 4530 | if (!GREEDY_REALLOC(result, n + 1)) |
2e59b241 LP |
4531 | return NULL; |
4532 | ||
4533 | result[n] = 0; | |
4534 | ||
ae2a15bc | 4535 | return TAKE_PTR(result); |
2e59b241 LP |
4536 | } |
4537 | ||
4538 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4539 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4540 | const char *dir, *wrapped; |
26d04f86 | 4541 | int r; |
71645aca LP |
4542 | |
4543 | assert(u); | |
2e59b241 LP |
4544 | assert(name); |
4545 | assert(data); | |
4546 | ||
4547 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4548 | return 0; | |
4549 | ||
4550 | data = unit_escape_setting(data, flags, &escaped); | |
4551 | if (!data) | |
4552 | return -ENOMEM; | |
4553 | ||
4554 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4555 | * previous section header is the same */ | |
4556 | ||
4557 | if (flags & UNIT_PRIVATE) { | |
4558 | if (!UNIT_VTABLE(u)->private_section) | |
4559 | return -EINVAL; | |
4560 | ||
4561 | if (!u->transient_file || u->last_section_private < 0) | |
4562 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4563 | else if (u->last_section_private == 0) | |
4564 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4565 | } else { | |
4566 | if (!u->transient_file || u->last_section_private < 0) | |
4567 | data = strjoina("[Unit]\n", data); | |
4568 | else if (u->last_section_private > 0) | |
4569 | data = strjoina("\n[Unit]\n", data); | |
4570 | } | |
71645aca | 4571 | |
4f4afc88 LP |
4572 | if (u->transient_file) { |
4573 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4574 | * write to the transient unit file. */ | |
4575 | fputs(data, u->transient_file); | |
4f4afc88 | 4576 | |
2e59b241 LP |
4577 | if (!endswith(data, "\n")) |
4578 | fputc('\n', u->transient_file); | |
4579 | ||
4580 | /* Remember which section we wrote this entry to */ | |
4581 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4582 | return 0; |
2e59b241 | 4583 | } |
8e2af478 | 4584 | |
2e59b241 | 4585 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4586 | if (!dir) |
4587 | return -EINVAL; | |
71645aca | 4588 | |
2a9a6f8a | 4589 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4590 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4591 | data, |
4592 | "\n"); | |
e20b2a86 | 4593 | |
815b09d3 | 4594 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4595 | if (r < 0) |
4596 | return r; | |
4597 | ||
45639f1b | 4598 | (void) mkdir_p_label(p, 0755); |
4dba44a5 ZJS |
4599 | |
4600 | /* Make sure the drop-in dir is registered in our path cache. This way we don't need to stupidly | |
4601 | * recreate the cache after every drop-in we write. */ | |
4602 | if (u->manager->unit_path_cache) { | |
be327321 | 4603 | r = set_put_strdup(&u->manager->unit_path_cache, p); |
4dba44a5 ZJS |
4604 | if (r < 0) |
4605 | return r; | |
4606 | } | |
4607 | ||
2a9a6f8a | 4608 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4609 | if (r < 0) |
4610 | return r; | |
4611 | ||
815b09d3 | 4612 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4613 | if (r < 0) |
4614 | return r; | |
815b09d3 | 4615 | q = NULL; |
adb76a70 | 4616 | |
adb76a70 WC |
4617 | strv_uniq(u->dropin_paths); |
4618 | ||
4619 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4620 | ||
4621 | return 0; | |
26d04f86 | 4622 | } |
71645aca | 4623 | |
2e59b241 | 4624 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4625 | _cleanup_free_ char *p = NULL; |
4626 | va_list ap; | |
4627 | int r; | |
4628 | ||
4629 | assert(u); | |
4630 | assert(name); | |
4631 | assert(format); | |
4632 | ||
2e59b241 | 4633 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4634 | return 0; |
4635 | ||
4636 | va_start(ap, format); | |
4637 | r = vasprintf(&p, format, ap); | |
4638 | va_end(ap); | |
4639 | ||
4640 | if (r < 0) | |
4641 | return -ENOMEM; | |
4642 | ||
2e59b241 | 4643 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4644 | } |
71645aca | 4645 | |
c2756a68 | 4646 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4647 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4648 | FILE *f; |
4f4afc88 | 4649 | |
c2756a68 LP |
4650 | assert(u); |
4651 | ||
3f5e8115 LP |
4652 | if (!UNIT_VTABLE(u)->can_transient) |
4653 | return -EOPNOTSUPP; | |
4654 | ||
45639f1b LP |
4655 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4656 | ||
657ee2d8 | 4657 | path = path_join(u->manager->lookup_paths.transient, u->id); |
4f4afc88 LP |
4658 | if (!path) |
4659 | return -ENOMEM; | |
4660 | ||
4661 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4662 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4663 | ||
2053593f | 4664 | WITH_UMASK(0022) { |
4f4afc88 | 4665 | f = fopen(path, "we"); |
0126c8f3 | 4666 | if (!f) |
78e334b5 | 4667 | return -errno; |
4f4afc88 LP |
4668 | } |
4669 | ||
0126c8f3 | 4670 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4671 | u->transient_file = f; |
4672 | ||
0126c8f3 | 4673 | free_and_replace(u->fragment_path, path); |
7c65093a | 4674 | |
7c65093a LP |
4675 | u->source_path = mfree(u->source_path); |
4676 | u->dropin_paths = strv_free(u->dropin_paths); | |
4677 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4678 | ||
4f4afc88 LP |
4679 | u->load_state = UNIT_STUB; |
4680 | u->load_error = 0; | |
4681 | u->transient = true; | |
4682 | ||
7c65093a LP |
4683 | unit_add_to_dbus_queue(u); |
4684 | unit_add_to_gc_queue(u); | |
c2756a68 | 4685 | |
4f4afc88 LP |
4686 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4687 | u->transient_file); | |
4688 | ||
3f5e8115 | 4689 | return 0; |
c2756a68 LP |
4690 | } |
4691 | ||
4d1b2df1 | 4692 | static int log_kill(const PidRef *pid, int sig, void *userdata) { |
1d98fef1 LP |
4693 | _cleanup_free_ char *comm = NULL; |
4694 | ||
4d1b2df1 LP |
4695 | assert(pidref_is_set(pid)); |
4696 | ||
4697 | (void) pidref_get_comm(pid, &comm); | |
1d98fef1 LP |
4698 | |
4699 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4700 | only, like for example systemd's own PAM stub process. */ | |
4701 | if (comm && comm[0] == '(') | |
500cd2e8 | 4702 | /* Although we didn't log anything, as this callback is used in unit_kill_context we must return 1 |
4703 | * here to let the manager know that a process was killed. */ | |
4704 | return 1; | |
1d98fef1 LP |
4705 | |
4706 | log_unit_notice(userdata, | |
4707 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4d1b2df1 | 4708 | pid->pid, |
1d98fef1 LP |
4709 | strna(comm), |
4710 | signal_to_string(sig)); | |
c53d2d54 DB |
4711 | |
4712 | return 1; | |
1d98fef1 LP |
4713 | } |
4714 | ||
efa75d70 LP |
4715 | static int operation_to_signal( |
4716 | const KillContext *c, | |
4717 | KillOperation k, | |
4718 | bool *ret_noteworthy) { | |
4719 | ||
1d98fef1 LP |
4720 | assert(c); |
4721 | ||
4722 | switch (k) { | |
4723 | ||
4724 | case KILL_TERMINATE: | |
4725 | case KILL_TERMINATE_AND_LOG: | |
efa75d70 | 4726 | *ret_noteworthy = false; |
1d98fef1 LP |
4727 | return c->kill_signal; |
4728 | ||
a232ebcc | 4729 | case KILL_RESTART: |
efa75d70 | 4730 | *ret_noteworthy = false; |
a232ebcc ZJS |
4731 | return restart_kill_signal(c); |
4732 | ||
1d98fef1 | 4733 | case KILL_KILL: |
efa75d70 | 4734 | *ret_noteworthy = true; |
fbb48d4c | 4735 | return c->final_kill_signal; |
1d98fef1 | 4736 | |
c87700a1 | 4737 | case KILL_WATCHDOG: |
efa75d70 | 4738 | *ret_noteworthy = true; |
c87700a1 | 4739 | return c->watchdog_signal; |
1d98fef1 LP |
4740 | |
4741 | default: | |
04499a70 | 4742 | assert_not_reached(); |
1d98fef1 LP |
4743 | } |
4744 | } | |
4745 | ||
fe80d626 YW |
4746 | static int unit_kill_context_one( |
4747 | Unit *u, | |
4748 | const PidRef *pidref, | |
4749 | const char *type, | |
4750 | bool is_alien, | |
4751 | int sig, | |
4752 | bool send_sighup, | |
4753 | cg_kill_log_func_t log_func) { | |
4754 | ||
4755 | int r; | |
4756 | ||
4757 | assert(u); | |
4758 | assert(type); | |
4759 | ||
4760 | /* This returns > 0 if it makes sense to wait for SIGCHLD for the process, == 0 if not. */ | |
4761 | ||
4762 | if (!pidref_is_set(pidref)) | |
4763 | return 0; | |
4764 | ||
4765 | if (log_func) | |
4766 | log_func(pidref, sig, u); | |
4767 | ||
4768 | r = pidref_kill_and_sigcont(pidref, sig); | |
4769 | if (r == -ESRCH) | |
4770 | return !is_alien; | |
4771 | if (r < 0) { | |
4772 | _cleanup_free_ char *comm = NULL; | |
4773 | ||
4774 | (void) pidref_get_comm(pidref, &comm); | |
4775 | return log_unit_warning_errno(u, r, "Failed to kill %s process " PID_FMT " (%s), ignoring: %m", type, pidref->pid, strna(comm)); | |
4776 | } | |
4777 | ||
4778 | if (send_sighup) | |
4779 | (void) pidref_kill(pidref, SIGHUP); | |
4780 | ||
4781 | return !is_alien; | |
4782 | } | |
4783 | ||
b826e317 | 4784 | int unit_kill_context(Unit *u, KillOperation k) { |
1d98fef1 | 4785 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4786 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4787 | int sig, r; |
cd2086fe LP |
4788 | |
4789 | assert(u); | |
cd2086fe | 4790 | |
8aff7ac4 LP |
4791 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. Returns > 0 |
4792 | * if we killed something worth waiting for, 0 otherwise. Do not confuse with unit_kill_common() | |
4793 | * which is used for user-requested killing of unit processes. */ | |
1d98fef1 | 4794 | |
b826e317 YW |
4795 | KillContext *c = unit_get_kill_context(u); |
4796 | if (!c || c->kill_mode == KILL_NONE) | |
cd2086fe LP |
4797 | return 0; |
4798 | ||
4ab1670f ZJS |
4799 | bool noteworthy; |
4800 | sig = operation_to_signal(c, k, ¬eworthy); | |
4801 | if (noteworthy) | |
4802 | log_func = log_kill; | |
1d98fef1 LP |
4803 | |
4804 | send_sighup = | |
4805 | c->send_sighup && | |
4806 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4807 | sig != SIGHUP; | |
4808 | ||
b826e317 YW |
4809 | bool is_alien; |
4810 | PidRef *main_pid = unit_main_pid_full(u, &is_alien); | |
fe80d626 YW |
4811 | r = unit_kill_context_one(u, main_pid, "main", is_alien, sig, send_sighup, log_func); |
4812 | wait_for_exit = wait_for_exit || r > 0; | |
cd2086fe | 4813 | |
fe80d626 YW |
4814 | r = unit_kill_context_one(u, unit_control_pid(u), "control", /* is_alien = */ false, sig, send_sighup, log_func); |
4815 | wait_for_exit = wait_for_exit || r > 0; | |
cd2086fe | 4816 | |
9cc54544 LP |
4817 | CGroupRuntime *crt = unit_get_cgroup_runtime(u); |
4818 | if (crt && crt->cgroup_path && | |
b821a397 | 4819 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { |
cd2086fe LP |
4820 | _cleanup_set_free_ Set *pid_set = NULL; |
4821 | ||
82659fd7 | 4822 | /* Exclude the main/control pids from being killed via the cgroup */ |
ae6a9e65 YW |
4823 | r = unit_pid_set(u, &pid_set); |
4824 | if (r < 0) | |
4825 | return r; | |
cd2086fe | 4826 | |
bd1791b5 | 4827 | r = cg_kill_recursive( |
9cc54544 | 4828 | crt->cgroup_path, |
bd1791b5 LP |
4829 | sig, |
4830 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4831 | pid_set, | |
4832 | log_func, u); | |
cd2086fe | 4833 | if (r < 0) { |
4c701096 | 4834 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
9cc54544 | 4835 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", empty_to_root(crt->cgroup_path)); |
b821a397 | 4836 | |
82659fd7 | 4837 | } else if (r > 0) { |
bc6aed7b | 4838 | |
1d9cc876 LP |
4839 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4840 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
4841 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
4842 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
4843 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
4844 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 4845 | |
c22800e4 | 4846 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 4847 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 4848 | wait_for_exit = true; |
58ea275a | 4849 | |
1d98fef1 | 4850 | if (send_sighup) { |
ae6a9e65 YW |
4851 | r = unit_pid_set(u, &pid_set); |
4852 | if (r < 0) | |
4853 | return r; | |
82659fd7 | 4854 | |
bd1791b5 | 4855 | (void) cg_kill_recursive( |
9cc54544 | 4856 | crt->cgroup_path, |
bd1791b5 LP |
4857 | SIGHUP, |
4858 | CGROUP_IGNORE_SELF, | |
4859 | pid_set, | |
4860 | /* kill_log= */ NULL, | |
4861 | /* userdata= */ NULL); | |
82659fd7 LP |
4862 | } |
4863 | } | |
cd2086fe LP |
4864 | } |
4865 | ||
4866 | return wait_for_exit; | |
4867 | } | |
4868 | ||
9e615fa3 LB |
4869 | int unit_add_mounts_for(Unit *u, const char *path, UnitDependencyMask mask, UnitMountDependencyType type) { |
4870 | Hashmap **unit_map, **manager_map; | |
a57f7e2c LP |
4871 | int r; |
4872 | ||
4873 | assert(u); | |
4874 | assert(path); | |
9e615fa3 LB |
4875 | assert(type >= 0 && type < _UNIT_MOUNT_DEPENDENCY_TYPE_MAX); |
4876 | ||
4877 | unit_map = &u->mounts_for[type]; | |
4878 | manager_map = &u->manager->units_needing_mounts_for[type]; | |
a57f7e2c | 4879 | |
ac19bdd0 ZJS |
4880 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these |
4881 | * paths in the unit (from the path to the UnitDependencyInfo structure indicating how to the | |
4882 | * dependency came to be). However, we build a prefix table for all possible prefixes so that new | |
4883 | * appearing mount units can easily determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4884 | |
70b64bd3 ZJS |
4885 | if (!path_is_absolute(path)) |
4886 | return -EINVAL; | |
4887 | ||
9e615fa3 | 4888 | if (hashmap_contains(*unit_map, path)) /* Exit quickly if the path is already covered. */ |
ac19bdd0 | 4889 | return 0; |
eef85c4a | 4890 | |
ac19bdd0 ZJS |
4891 | /* Use the canonical form of the path as the stored key. We call path_is_normalized() |
4892 | * only after simplification, since path_is_normalized() rejects paths with '.'. | |
4893 | * path_is_normalized() also verifies that the path fits in PATH_MAX. */ | |
cf3d95b2 YW |
4894 | _cleanup_free_ char *p = NULL; |
4895 | r = path_simplify_alloc(path, &p); | |
4896 | if (r < 0) | |
4897 | return r; | |
4898 | path = p; | |
a57f7e2c | 4899 | |
ca8700e9 | 4900 | if (!path_is_normalized(path)) |
a57f7e2c | 4901 | return -EPERM; |
a57f7e2c | 4902 | |
ac19bdd0 | 4903 | UnitDependencyInfo di = { |
eef85c4a LP |
4904 | .origin_mask = mask |
4905 | }; | |
4906 | ||
9e615fa3 | 4907 | r = hashmap_ensure_put(unit_map, &path_hash_ops, p, di.data); |
ca8700e9 | 4908 | if (r < 0) |
a57f7e2c | 4909 | return r; |
ac19bdd0 ZJS |
4910 | assert(r > 0); |
4911 | TAKE_PTR(p); /* path remains a valid pointer to the string stored in the hashmap */ | |
a57f7e2c | 4912 | |
4cb06c59 | 4913 | char prefix[strlen(path) + 1]; |
ca8700e9 | 4914 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
a57f7e2c LP |
4915 | Set *x; |
4916 | ||
9e615fa3 | 4917 | x = hashmap_get(*manager_map, prefix); |
a57f7e2c | 4918 | if (!x) { |
ca8700e9 | 4919 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 4920 | |
9e615fa3 | 4921 | r = hashmap_ensure_allocated(manager_map, &path_hash_ops); |
742f41ad LP |
4922 | if (r < 0) |
4923 | return r; | |
a57f7e2c LP |
4924 | |
4925 | q = strdup(prefix); | |
4926 | if (!q) | |
4927 | return -ENOMEM; | |
4928 | ||
d5099efc | 4929 | x = set_new(NULL); |
ca8700e9 | 4930 | if (!x) |
a57f7e2c | 4931 | return -ENOMEM; |
a57f7e2c | 4932 | |
9e615fa3 | 4933 | r = hashmap_put(*manager_map, q, x); |
a57f7e2c | 4934 | if (r < 0) { |
a57f7e2c LP |
4935 | set_free(x); |
4936 | return r; | |
4937 | } | |
ca8700e9 | 4938 | q = NULL; |
a57f7e2c LP |
4939 | } |
4940 | ||
4941 | r = set_put(x, u); | |
4942 | if (r < 0) | |
4943 | return r; | |
4944 | } | |
4945 | ||
4946 | return 0; | |
4947 | } | |
4948 | ||
613b411c | 4949 | int unit_setup_exec_runtime(Unit *u) { |
28135da3 | 4950 | _cleanup_(exec_shared_runtime_unrefp) ExecSharedRuntime *esr = NULL; |
15220772 | 4951 | _cleanup_(dynamic_creds_unrefp) DynamicCreds *dcreds = NULL; |
83123a44 | 4952 | _cleanup_set_free_ Set *units = NULL; |
28135da3 | 4953 | ExecRuntime **rt; |
15220772 | 4954 | ExecContext *ec; |
613b411c | 4955 | size_t offset; |
613b411c | 4956 | Unit *other; |
e8a565cb | 4957 | int r; |
613b411c LP |
4958 | |
4959 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4960 | assert(offset > 0); | |
4961 | ||
28135da3 DDM |
4962 | /* Check if there already is an ExecRuntime for this unit? */ |
4963 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
613b411c LP |
4964 | if (*rt) |
4965 | return 0; | |
4966 | ||
a5801e97 | 4967 | ec = ASSERT_PTR(unit_get_exec_context(u)); |
15220772 | 4968 | |
83123a44 YW |
4969 | r = unit_get_transitive_dependency_set(u, UNIT_ATOM_JOINS_NAMESPACE_OF, &units); |
4970 | if (r < 0) | |
4971 | return r; | |
4972 | ||
613b411c | 4973 | /* Try to get it from somebody else */ |
83123a44 | 4974 | SET_FOREACH(other, units) { |
28135da3 DDM |
4975 | r = exec_shared_runtime_acquire(u->manager, NULL, other->id, false, &esr); |
4976 | if (r < 0) | |
4977 | return r; | |
4978 | if (r > 0) | |
4979 | break; | |
4980 | } | |
4981 | ||
4982 | if (!esr) { | |
15220772 | 4983 | r = exec_shared_runtime_acquire(u->manager, ec, u->id, true, &esr); |
28135da3 DDM |
4984 | if (r < 0) |
4985 | return r; | |
613b411c LP |
4986 | } |
4987 | ||
15220772 DDM |
4988 | if (ec->dynamic_user) { |
4989 | r = dynamic_creds_make(u->manager, ec->user, ec->group, &dcreds); | |
4990 | if (r < 0) | |
4991 | return r; | |
4992 | } | |
4993 | ||
9c0c6701 | 4994 | r = exec_runtime_make(u, ec, esr, dcreds, rt); |
28135da3 DDM |
4995 | if (r < 0) |
4996 | return r; | |
4997 | ||
4998 | TAKE_PTR(esr); | |
15220772 | 4999 | TAKE_PTR(dcreds); |
28135da3 DDM |
5000 | |
5001 | return r; | |
613b411c LP |
5002 | } |
5003 | ||
9cc54544 LP |
5004 | CGroupRuntime *unit_setup_cgroup_runtime(Unit *u) { |
5005 | size_t offset; | |
5006 | ||
5007 | assert(u); | |
5008 | ||
5009 | offset = UNIT_VTABLE(u)->cgroup_runtime_offset; | |
5010 | assert(offset > 0); | |
5011 | ||
5012 | CGroupRuntime **rt = (CGroupRuntime**) ((uint8_t*) u + offset); | |
5013 | if (*rt) | |
5014 | return *rt; | |
5015 | ||
5016 | return (*rt = cgroup_runtime_new()); | |
5017 | } | |
5018 | ||
1c2e9646 | 5019 | bool unit_type_supported(UnitType t) { |
88e4bfa6 MS |
5020 | static int8_t cache[_UNIT_TYPE_MAX] = {}; /* -1: disabled, 1: enabled: 0: don't know */ |
5021 | int r; | |
5022 | ||
ffcf54d4 | 5023 | assert(t >= 0 && t < _UNIT_TYPE_MAX); |
1c2e9646 | 5024 | |
88e4bfa6 MS |
5025 | if (cache[t] == 0) { |
5026 | char *e; | |
5027 | ||
5028 | e = strjoina("SYSTEMD_SUPPORT_", unit_type_to_string(t)); | |
5029 | ||
5030 | r = getenv_bool(ascii_strupper(e)); | |
5031 | if (r < 0 && r != -ENXIO) | |
5032 | log_debug_errno(r, "Failed to parse $%s, ignoring: %m", e); | |
5033 | ||
5034 | cache[t] = r == 0 ? -1 : 1; | |
5035 | } | |
5036 | if (cache[t] < 0) | |
5037 | return false; | |
5038 | ||
1c2e9646 LP |
5039 | if (!unit_vtable[t]->supported) |
5040 | return true; | |
5041 | ||
5042 | return unit_vtable[t]->supported(); | |
5043 | } | |
5044 | ||
8b4305c7 LP |
5045 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
5046 | int r; | |
5047 | ||
5048 | assert(u); | |
5049 | assert(where); | |
5050 | ||
c2503e35 RH |
5051 | if (!unit_log_level_test(u, LOG_NOTICE)) |
5052 | return; | |
5053 | ||
db55bbf2 | 5054 | r = dir_is_empty(where, /* ignore_hidden_or_backup= */ false); |
3f602115 | 5055 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
5056 | return; |
5057 | if (r < 0) { | |
5058 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
5059 | return; | |
5060 | } | |
5061 | ||
c2503e35 RH |
5062 | log_unit_struct(u, LOG_NOTICE, |
5063 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
5064 | LOG_UNIT_INVOCATION_ID(u), | |
5065 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
5066 | "WHERE=%s", where); | |
8b4305c7 LP |
5067 | } |
5068 | ||
25cd4964 | 5069 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
58d9d89b | 5070 | _cleanup_free_ char *canonical_where = NULL; |
8b4305c7 LP |
5071 | int r; |
5072 | ||
5073 | assert(u); | |
5074 | assert(where); | |
5075 | ||
f461a28d | 5076 | r = chase(where, NULL, CHASE_NONEXISTENT, &canonical_where, NULL); |
8b4305c7 | 5077 | if (r < 0) { |
25cd4964 | 5078 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
5079 | return 0; |
5080 | } | |
25cd4964 AJ |
5081 | |
5082 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
5083 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
5084 | return 0; |
5085 | ||
25cd4964 | 5086 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
c2503e35 RH |
5087 | log_unit_struct(u, LOG_ERR, |
5088 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
5089 | LOG_UNIT_INVOCATION_ID(u), | |
5090 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), | |
5091 | "WHERE=%s", where); | |
8b4305c7 LP |
5092 | |
5093 | return -ELOOP; | |
5094 | } | |
0f13f3bd LP |
5095 | |
5096 | bool unit_is_pristine(Unit *u) { | |
5097 | assert(u); | |
5098 | ||
1f832446 ZJS |
5099 | /* Check if the unit already exists or is already around, in a number of different ways. Note that to |
5100 | * cater for unit types such as slice, we are generally fine with units that are marked UNIT_LOADED | |
5101 | * even though nothing was actually loaded, as those unit types don't require a file on disk. | |
5102 | * | |
5103 | * Note that we don't check for drop-ins here, because we allow drop-ins for transient units | |
5104 | * identically to non-transient units, both unit-specific and hierarchical. E.g. for a-b-c.service: | |
5105 | * service.d/….conf, a-.service.d/….conf, a-b-.service.d/….conf, a-b-c.service.d/….conf. | |
5106 | */ | |
0f13f3bd | 5107 | |
b146a734 ZJS |
5108 | return IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) && |
5109 | !u->fragment_path && | |
5110 | !u->source_path && | |
b146a734 ZJS |
5111 | !u->job && |
5112 | !u->merged_into; | |
0f13f3bd | 5113 | } |
291d565a | 5114 | |
37eb258e | 5115 | PidRef* unit_control_pid(Unit *u) { |
291d565a LP |
5116 | assert(u); |
5117 | ||
5118 | if (UNIT_VTABLE(u)->control_pid) | |
5119 | return UNIT_VTABLE(u)->control_pid(u); | |
5120 | ||
37eb258e | 5121 | return NULL; |
291d565a LP |
5122 | } |
5123 | ||
3e22239d | 5124 | PidRef* unit_main_pid_full(Unit *u, bool *ret_is_alien) { |
291d565a LP |
5125 | assert(u); |
5126 | ||
5127 | if (UNIT_VTABLE(u)->main_pid) | |
3e22239d | 5128 | return UNIT_VTABLE(u)->main_pid(u, ret_is_alien); |
291d565a | 5129 | |
3e22239d YW |
5130 | if (ret_is_alien) |
5131 | *ret_is_alien = false; | |
37eb258e | 5132 | return NULL; |
291d565a | 5133 | } |
00d9ef85 | 5134 | |
3bb48b19 TM |
5135 | static void unit_modify_user_nft_set(Unit *u, bool add, NFTSetSource source, uint32_t element) { |
5136 | int r; | |
5137 | ||
5138 | assert(u); | |
5139 | ||
5140 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5141 | return; | |
5142 | ||
5143 | CGroupContext *c; | |
5144 | c = unit_get_cgroup_context(u); | |
5145 | if (!c) | |
5146 | return; | |
5147 | ||
5148 | if (!u->manager->fw_ctx) { | |
5149 | r = fw_ctx_new_full(&u->manager->fw_ctx, /* init_tables= */ false); | |
5150 | if (r < 0) | |
5151 | return; | |
5152 | ||
5153 | assert(u->manager->fw_ctx); | |
5154 | } | |
5155 | ||
5156 | FOREACH_ARRAY(nft_set, c->nft_set_context.sets, c->nft_set_context.n_sets) { | |
5157 | if (nft_set->source != source) | |
5158 | continue; | |
5159 | ||
5160 | r = nft_set_element_modify_any(u->manager->fw_ctx, add, nft_set->nfproto, nft_set->table, nft_set->set, &element, sizeof(element)); | |
5161 | if (r < 0) | |
5162 | log_warning_errno(r, "Failed to %s NFT set: family %s, table %s, set %s, ID %u, ignoring: %m", | |
5163 | add? "add" : "delete", nfproto_to_string(nft_set->nfproto), nft_set->table, nft_set->set, element); | |
5164 | else | |
5165 | log_debug("%s NFT set: family %s, table %s, set %s, ID %u", | |
5166 | add? "Added" : "Deleted", nfproto_to_string(nft_set->nfproto), nft_set->table, nft_set->set, element); | |
5167 | } | |
5168 | } | |
5169 | ||
00d9ef85 LP |
5170 | static void unit_unref_uid_internal( |
5171 | Unit *u, | |
5172 | uid_t *ref_uid, | |
5173 | bool destroy_now, | |
5174 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
5175 | ||
5176 | assert(u); | |
5177 | assert(ref_uid); | |
5178 | assert(_manager_unref_uid); | |
5179 | ||
5180 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
5181 | * gid_t are actually the same time, with the same validity rules. | |
5182 | * | |
5183 | * Drops a reference to UID/GID from a unit. */ | |
5184 | ||
5185 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
5186 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
5187 | ||
5188 | if (!uid_is_valid(*ref_uid)) | |
5189 | return; | |
5190 | ||
5191 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
5192 | *ref_uid = UID_INVALID; | |
5193 | } | |
5194 | ||
b90cf102 | 5195 | static void unit_unref_uid(Unit *u, bool destroy_now) { |
3bb48b19 TM |
5196 | assert(u); |
5197 | ||
5198 | unit_modify_user_nft_set(u, /* add = */ false, NFT_SET_SOURCE_USER, u->ref_uid); | |
5199 | ||
00d9ef85 LP |
5200 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); |
5201 | } | |
5202 | ||
b90cf102 | 5203 | static void unit_unref_gid(Unit *u, bool destroy_now) { |
3bb48b19 TM |
5204 | assert(u); |
5205 | ||
5206 | unit_modify_user_nft_set(u, /* add = */ false, NFT_SET_SOURCE_GROUP, u->ref_gid); | |
5207 | ||
00d9ef85 LP |
5208 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); |
5209 | } | |
5210 | ||
b90cf102 LP |
5211 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { |
5212 | assert(u); | |
5213 | ||
5214 | unit_unref_uid(u, destroy_now); | |
5215 | unit_unref_gid(u, destroy_now); | |
5216 | } | |
5217 | ||
00d9ef85 LP |
5218 | static int unit_ref_uid_internal( |
5219 | Unit *u, | |
5220 | uid_t *ref_uid, | |
5221 | uid_t uid, | |
5222 | bool clean_ipc, | |
5223 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
5224 | ||
5225 | int r; | |
5226 | ||
5227 | assert(u); | |
5228 | assert(ref_uid); | |
5229 | assert(uid_is_valid(uid)); | |
5230 | assert(_manager_ref_uid); | |
5231 | ||
5232 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
5233 | * are actually the same type, and have the same validity rules. | |
5234 | * | |
5235 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
5236 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
5237 | * drops to zero. */ | |
5238 | ||
5239 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
5240 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
5241 | ||
5242 | if (*ref_uid == uid) | |
5243 | return 0; | |
5244 | ||
5245 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
5246 | return -EBUSY; | |
5247 | ||
5248 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
5249 | if (r < 0) | |
5250 | return r; | |
5251 | ||
5252 | *ref_uid = uid; | |
5253 | return 1; | |
5254 | } | |
5255 | ||
b90cf102 | 5256 | static int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { |
00d9ef85 LP |
5257 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); |
5258 | } | |
5259 | ||
b90cf102 | 5260 | static int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { |
00d9ef85 LP |
5261 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); |
5262 | } | |
5263 | ||
5264 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
5265 | int r = 0, q = 0; | |
5266 | ||
5267 | assert(u); | |
5268 | ||
5269 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
5270 | ||
5271 | if (uid_is_valid(uid)) { | |
5272 | r = unit_ref_uid(u, uid, clean_ipc); | |
5273 | if (r < 0) | |
5274 | return r; | |
5275 | } | |
5276 | ||
5277 | if (gid_is_valid(gid)) { | |
5278 | q = unit_ref_gid(u, gid, clean_ipc); | |
5279 | if (q < 0) { | |
5280 | if (r > 0) | |
5281 | unit_unref_uid(u, false); | |
5282 | ||
5283 | return q; | |
5284 | } | |
5285 | } | |
5286 | ||
5287 | return r > 0 || q > 0; | |
5288 | } | |
5289 | ||
5290 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
5291 | ExecContext *c; | |
5292 | int r; | |
5293 | ||
5294 | assert(u); | |
5295 | ||
5296 | c = unit_get_exec_context(u); | |
5297 | ||
5298 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
5299 | if (r < 0) | |
5300 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
5301 | ||
3bb48b19 TM |
5302 | unit_modify_user_nft_set(u, /* add = */ true, NFT_SET_SOURCE_USER, uid); |
5303 | unit_modify_user_nft_set(u, /* add = */ true, NFT_SET_SOURCE_GROUP, gid); | |
5304 | ||
00d9ef85 LP |
5305 | return r; |
5306 | } | |
5307 | ||
00d9ef85 LP |
5308 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { |
5309 | int r; | |
5310 | ||
5311 | assert(u); | |
5312 | ||
5313 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
5314 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
5315 | * objects when no service references the UID/GID anymore. */ | |
5316 | ||
5317 | r = unit_ref_uid_gid(u, uid, gid); | |
5318 | if (r > 0) | |
37d0b962 | 5319 | unit_add_to_dbus_queue(u); |
00d9ef85 | 5320 | } |
4b58153d | 5321 | |
4b58153d LP |
5322 | int unit_acquire_invocation_id(Unit *u) { |
5323 | sd_id128_t id; | |
5324 | int r; | |
5325 | ||
5326 | assert(u); | |
5327 | ||
5328 | r = sd_id128_randomize(&id); | |
5329 | if (r < 0) | |
5330 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
5331 | ||
5332 | r = unit_set_invocation_id(u, id); | |
5333 | if (r < 0) | |
5334 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
5335 | ||
af92c603 | 5336 | unit_add_to_dbus_queue(u); |
4b58153d LP |
5337 | return 0; |
5338 | } | |
f0d47797 | 5339 | |
1ad6e8b3 LP |
5340 | int unit_set_exec_params(Unit *u, ExecParameters *p) { |
5341 | int r; | |
5342 | ||
7960b0c7 LP |
5343 | assert(u); |
5344 | assert(p); | |
f0d47797 | 5345 | |
004c7f16 | 5346 | /* Copy parameters from manager */ |
1ad6e8b3 LP |
5347 | r = manager_get_effective_environment(u->manager, &p->environment); |
5348 | if (r < 0) | |
5349 | return r; | |
5350 | ||
170d978b LP |
5351 | p->runtime_scope = u->manager->runtime_scope; |
5352 | ||
6a705f12 | 5353 | r = strdup_to(&p->confirm_spawn, manager_get_confirm_spawn(u->manager)); |
a5801e97 MY |
5354 | if (r < 0) |
5355 | return r; | |
bb5232b6 | 5356 | |
004c7f16 LP |
5357 | p->cgroup_supported = u->manager->cgroup_supported; |
5358 | p->prefix = u->manager->prefix; | |
5359 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
5360 | ||
5238e957 | 5361 | /* Copy parameters from unit */ |
9cc54544 LP |
5362 | CGroupRuntime *crt = unit_get_cgroup_runtime(u); |
5363 | p->cgroup_path = crt ? crt->cgroup_path : NULL; | |
1d9cc876 | 5364 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
1ad6e8b3 | 5365 | |
2ad591a3 LP |
5366 | p->received_credentials_directory = u->manager->received_credentials_directory; |
5367 | p->received_encrypted_credentials_directory = u->manager->received_encrypted_credentials_directory; | |
bb0c0d6f | 5368 | |
c8ccd444 | 5369 | p->shall_confirm_spawn = u->manager->confirm_spawn; |
154eb43f LB |
5370 | |
5371 | p->fallback_smack_process_label = u->manager->defaults.smack_process_label; | |
5372 | ||
352ec23c LP |
5373 | if (u->manager->restrict_fs && p->bpf_restrict_fs_map_fd < 0) { |
5374 | int fd = bpf_restrict_fs_map_fd(u); | |
154eb43f LB |
5375 | if (fd < 0) |
5376 | return fd; | |
5377 | ||
352ec23c | 5378 | p->bpf_restrict_fs_map_fd = fd; |
154eb43f LB |
5379 | } |
5380 | ||
b646fc32 | 5381 | p->user_lookup_fd = u->manager->user_lookup_fds[1]; |
12001b1b | 5382 | p->handoff_timestamp_fd = u->manager->handoff_timestamp_fds[1]; |
b646fc32 | 5383 | |
9cc54544 | 5384 | p->cgroup_id = crt ? crt->cgroup_id : 0; |
b646fc32 LB |
5385 | p->invocation_id = u->invocation_id; |
5386 | sd_id128_to_string(p->invocation_id, p->invocation_id_string); | |
5387 | p->unit_id = strdup(u->id); | |
5388 | if (!p->unit_id) | |
5389 | return -ENOMEM; | |
154eb43f | 5390 | |
1ad6e8b3 | 5391 | return 0; |
f0d47797 | 5392 | } |
a79279c7 | 5393 | |
4775b55d LP |
5394 | int unit_fork_helper_process(Unit *u, const char *name, PidRef *ret) { |
5395 | pid_t pid; | |
a79279c7 LP |
5396 | int r; |
5397 | ||
5398 | assert(u); | |
5399 | assert(ret); | |
5400 | ||
5401 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
5402 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
5403 | ||
5404 | (void) unit_realize_cgroup(u); | |
5405 | ||
9cc54544 LP |
5406 | CGroupRuntime *crt = unit_setup_cgroup_runtime(u); |
5407 | if (!crt) | |
5408 | return -ENOMEM; | |
5409 | ||
e9ccae31 | 5410 | r = safe_fork(name, FORK_REOPEN_LOG|FORK_DEATHSIG_SIGTERM, &pid); |
4775b55d LP |
5411 | if (r < 0) |
5412 | return r; | |
5413 | if (r > 0) { | |
5414 | _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL; | |
5415 | int q; | |
5416 | ||
5417 | /* Parent */ | |
5418 | ||
5419 | q = pidref_set_pid(&pidref, pid); | |
5420 | if (q < 0) | |
5421 | return q; | |
5422 | ||
5423 | *ret = TAKE_PIDREF(pidref); | |
4c253ed1 | 5424 | return r; |
4775b55d LP |
5425 | } |
5426 | ||
5427 | /* Child */ | |
a79279c7 | 5428 | |
9c274488 LP |
5429 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE); |
5430 | (void) ignore_signals(SIGPIPE); | |
a79279c7 | 5431 | |
9cc54544 LP |
5432 | if (crt->cgroup_path) { |
5433 | r = cg_attach_everywhere(u->manager->cgroup_supported, crt->cgroup_path, 0, NULL, NULL); | |
4c253ed1 | 5434 | if (r < 0) { |
9cc54544 | 5435 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", empty_to_root(crt->cgroup_path)); |
4c253ed1 | 5436 | _exit(EXIT_CGROUP); |
a79279c7 | 5437 | } |
a79279c7 LP |
5438 | } |
5439 | ||
4c253ed1 | 5440 | return 0; |
a79279c7 | 5441 | } |
c999cf38 | 5442 | |
4775b55d LP |
5443 | int unit_fork_and_watch_rm_rf(Unit *u, char **paths, PidRef *ret_pid) { |
5444 | _cleanup_(pidref_done) PidRef pid = PIDREF_NULL; | |
810ef318 YW |
5445 | int r; |
5446 | ||
5447 | assert(u); | |
5448 | assert(ret_pid); | |
5449 | ||
5450 | r = unit_fork_helper_process(u, "(sd-rmrf)", &pid); | |
5451 | if (r < 0) | |
5452 | return r; | |
5453 | if (r == 0) { | |
5454 | int ret = EXIT_SUCCESS; | |
810ef318 YW |
5455 | |
5456 | STRV_FOREACH(i, paths) { | |
5457 | r = rm_rf(*i, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_MISSING_OK); | |
5458 | if (r < 0) { | |
5459 | log_error_errno(r, "Failed to remove '%s': %m", *i); | |
5460 | ret = EXIT_FAILURE; | |
5461 | } | |
5462 | } | |
5463 | ||
5464 | _exit(ret); | |
5465 | } | |
5466 | ||
495e75ed | 5467 | r = unit_watch_pidref(u, &pid, /* exclusive= */ true); |
810ef318 YW |
5468 | if (r < 0) |
5469 | return r; | |
5470 | ||
4775b55d | 5471 | *ret_pid = TAKE_PIDREF(pid); |
810ef318 YW |
5472 | return 0; |
5473 | } | |
5474 | ||
15ed3c3a LP |
5475 | static void unit_update_dependency_mask(Hashmap *deps, Unit *other, UnitDependencyInfo di) { |
5476 | assert(deps); | |
c999cf38 LP |
5477 | assert(other); |
5478 | ||
15ed3c3a | 5479 | if (di.origin_mask == 0 && di.destination_mask == 0) |
c999cf38 | 5480 | /* No bit set anymore, let's drop the whole entry */ |
15ed3c3a LP |
5481 | assert_se(hashmap_remove(deps, other)); |
5482 | else | |
c999cf38 | 5483 | /* Mask was reduced, let's update the entry */ |
15ed3c3a | 5484 | assert_se(hashmap_update(deps, other, di.data) == 0); |
c999cf38 LP |
5485 | } |
5486 | ||
5487 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
15ed3c3a | 5488 | Hashmap *deps; |
c999cf38 LP |
5489 | assert(u); |
5490 | ||
5491 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5492 | ||
5493 | if (mask == 0) | |
5494 | return; | |
5495 | ||
15ed3c3a | 5496 | HASHMAP_FOREACH(deps, u->dependencies) { |
c999cf38 LP |
5497 | bool done; |
5498 | ||
5499 | do { | |
5500 | UnitDependencyInfo di; | |
5501 | Unit *other; | |
c999cf38 LP |
5502 | |
5503 | done = true; | |
5504 | ||
15ed3c3a LP |
5505 | HASHMAP_FOREACH_KEY(di.data, other, deps) { |
5506 | Hashmap *other_deps; | |
5507 | ||
1d6cc5d0 | 5508 | if (FLAGS_SET(~mask, di.origin_mask)) |
c999cf38 | 5509 | continue; |
15ed3c3a | 5510 | |
c999cf38 | 5511 | di.origin_mask &= ~mask; |
15ed3c3a | 5512 | unit_update_dependency_mask(deps, other, di); |
c999cf38 | 5513 | |
defe63b0 LP |
5514 | /* We updated the dependency from our unit to the other unit now. But most |
5515 | * dependencies imply a reverse dependency. Hence, let's delete that one | |
5516 | * too. For that we go through all dependency types on the other unit and | |
5517 | * delete all those which point to us and have the right mask set. */ | |
c999cf38 | 5518 | |
15ed3c3a | 5519 | HASHMAP_FOREACH(other_deps, other->dependencies) { |
c999cf38 LP |
5520 | UnitDependencyInfo dj; |
5521 | ||
15ed3c3a | 5522 | dj.data = hashmap_get(other_deps, u); |
1d6cc5d0 | 5523 | if (FLAGS_SET(~mask, dj.destination_mask)) |
c999cf38 | 5524 | continue; |
c999cf38 | 5525 | |
15ed3c3a LP |
5526 | dj.destination_mask &= ~mask; |
5527 | unit_update_dependency_mask(other_deps, u, dj); | |
c999cf38 LP |
5528 | } |
5529 | ||
5530 | unit_add_to_gc_queue(other); | |
5531 | ||
156ba52b YW |
5532 | /* The unit 'other' may not be wanted by the unit 'u'. */ |
5533 | unit_submit_to_stop_when_unneeded_queue(other); | |
5534 | ||
c999cf38 LP |
5535 | done = false; |
5536 | break; | |
5537 | } | |
5538 | ||
5539 | } while (!done); | |
5540 | } | |
5541 | } | |
d3070fbd | 5542 | |
2f8c48b6 AZ |
5543 | static int unit_get_invocation_path(Unit *u, char **ret) { |
5544 | char *p; | |
5545 | int r; | |
5546 | ||
5547 | assert(u); | |
5548 | assert(ret); | |
5549 | ||
5550 | if (MANAGER_IS_SYSTEM(u->manager)) | |
5551 | p = strjoin("/run/systemd/units/invocation:", u->id); | |
5552 | else { | |
5553 | _cleanup_free_ char *user_path = NULL; | |
5554 | r = xdg_user_runtime_dir(&user_path, "/systemd/units/invocation:"); | |
5555 | if (r < 0) | |
5556 | return r; | |
5557 | p = strjoin(user_path, u->id); | |
5558 | } | |
5559 | ||
5560 | if (!p) | |
5561 | return -ENOMEM; | |
5562 | ||
5563 | *ret = p; | |
5564 | return 0; | |
5565 | } | |
5566 | ||
d3070fbd | 5567 | static int unit_export_invocation_id(Unit *u) { |
2f8c48b6 | 5568 | _cleanup_free_ char *p = NULL; |
d3070fbd LP |
5569 | int r; |
5570 | ||
5571 | assert(u); | |
5572 | ||
5573 | if (u->exported_invocation_id) | |
5574 | return 0; | |
5575 | ||
5576 | if (sd_id128_is_null(u->invocation_id)) | |
5577 | return 0; | |
5578 | ||
2f8c48b6 AZ |
5579 | r = unit_get_invocation_path(u, &p); |
5580 | if (r < 0) | |
5581 | return log_unit_debug_errno(u, r, "Failed to get invocation path: %m"); | |
5582 | ||
a3f5fd96 | 5583 | r = symlink_atomic_label(u->invocation_id_string, p); |
d3070fbd LP |
5584 | if (r < 0) |
5585 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5586 | ||
5587 | u->exported_invocation_id = true; | |
5588 | return 0; | |
5589 | } | |
5590 | ||
5591 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5592 | const char *p; | |
5593 | char buf[2]; | |
5594 | int r; | |
5595 | ||
5596 | assert(u); | |
5597 | assert(c); | |
5598 | ||
5599 | if (u->exported_log_level_max) | |
5600 | return 0; | |
5601 | ||
5602 | if (c->log_level_max < 0) | |
5603 | return 0; | |
5604 | ||
5605 | assert(c->log_level_max <= 7); | |
5606 | ||
5607 | buf[0] = '0' + c->log_level_max; | |
5608 | buf[1] = 0; | |
5609 | ||
5610 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5611 | r = symlink_atomic(buf, p); | |
5612 | if (r < 0) | |
5613 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5614 | ||
5615 | u->exported_log_level_max = true; | |
5616 | return 0; | |
5617 | } | |
5618 | ||
5619 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
254d1313 | 5620 | _cleanup_close_ int fd = -EBADF; |
d3070fbd LP |
5621 | struct iovec *iovec; |
5622 | const char *p; | |
5623 | char *pattern; | |
5624 | le64_t *sizes; | |
5625 | ssize_t n; | |
d3070fbd LP |
5626 | int r; |
5627 | ||
5628 | if (u->exported_log_extra_fields) | |
5629 | return 0; | |
5630 | ||
5631 | if (c->n_log_extra_fields <= 0) | |
5632 | return 0; | |
5633 | ||
5634 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5635 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5636 | ||
12375b95 | 5637 | for (size_t i = 0; i < c->n_log_extra_fields; i++) { |
d3070fbd LP |
5638 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); |
5639 | ||
5640 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5641 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5642 | } | |
5643 | ||
5644 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5645 | pattern = strjoina(p, ".XXXXXX"); | |
5646 | ||
5647 | fd = mkostemp_safe(pattern); | |
5648 | if (fd < 0) | |
5649 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5650 | ||
5651 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5652 | if (n < 0) { | |
5653 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5654 | goto fail; | |
5655 | } | |
5656 | ||
5657 | (void) fchmod(fd, 0644); | |
5658 | ||
5659 | if (rename(pattern, p) < 0) { | |
5660 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5661 | goto fail; | |
5662 | } | |
5663 | ||
5664 | u->exported_log_extra_fields = true; | |
5665 | return 0; | |
5666 | ||
5667 | fail: | |
5668 | (void) unlink(pattern); | |
5669 | return r; | |
5670 | } | |
5671 | ||
5ac1530e | 5672 | static int unit_export_log_ratelimit_interval(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5673 | _cleanup_free_ char *buf = NULL; |
5674 | const char *p; | |
5675 | int r; | |
5676 | ||
5677 | assert(u); | |
5678 | assert(c); | |
5679 | ||
5ac1530e | 5680 | if (u->exported_log_ratelimit_interval) |
90fc172e AZ |
5681 | return 0; |
5682 | ||
5ac1530e | 5683 | if (c->log_ratelimit_interval_usec == 0) |
90fc172e AZ |
5684 | return 0; |
5685 | ||
5686 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5687 | ||
5ac1530e | 5688 | if (asprintf(&buf, "%" PRIu64, c->log_ratelimit_interval_usec) < 0) |
90fc172e AZ |
5689 | return log_oom(); |
5690 | ||
5691 | r = symlink_atomic(buf, p); | |
5692 | if (r < 0) | |
5693 | return log_unit_debug_errno(u, r, "Failed to create log rate limit interval symlink %s: %m", p); | |
5694 | ||
5ac1530e | 5695 | u->exported_log_ratelimit_interval = true; |
90fc172e AZ |
5696 | return 0; |
5697 | } | |
5698 | ||
5ac1530e | 5699 | static int unit_export_log_ratelimit_burst(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5700 | _cleanup_free_ char *buf = NULL; |
5701 | const char *p; | |
5702 | int r; | |
5703 | ||
5704 | assert(u); | |
5705 | assert(c); | |
5706 | ||
5ac1530e | 5707 | if (u->exported_log_ratelimit_burst) |
90fc172e AZ |
5708 | return 0; |
5709 | ||
5ac1530e | 5710 | if (c->log_ratelimit_burst == 0) |
90fc172e AZ |
5711 | return 0; |
5712 | ||
5713 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5714 | ||
5ac1530e | 5715 | if (asprintf(&buf, "%u", c->log_ratelimit_burst) < 0) |
90fc172e AZ |
5716 | return log_oom(); |
5717 | ||
5718 | r = symlink_atomic(buf, p); | |
5719 | if (r < 0) | |
5720 | return log_unit_debug_errno(u, r, "Failed to create log rate limit burst symlink %s: %m", p); | |
5721 | ||
5ac1530e | 5722 | u->exported_log_ratelimit_burst = true; |
90fc172e AZ |
5723 | return 0; |
5724 | } | |
5725 | ||
d3070fbd LP |
5726 | void unit_export_state_files(Unit *u) { |
5727 | const ExecContext *c; | |
5728 | ||
5729 | assert(u); | |
5730 | ||
5731 | if (!u->id) | |
5732 | return; | |
5733 | ||
638cece4 | 5734 | if (MANAGER_IS_TEST_RUN(u->manager)) |
8f632531 LP |
5735 | return; |
5736 | ||
d3070fbd LP |
5737 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5738 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5739 | * the IPC system itself and PID 1 also log to the journal. | |
5740 | * | |
5741 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5742 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5743 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5744 | * namespace at least. | |
5745 | * | |
5746 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5747 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5748 | * them with one. */ | |
5749 | ||
5750 | (void) unit_export_invocation_id(u); | |
5751 | ||
2f8c48b6 AZ |
5752 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5753 | return; | |
5754 | ||
d3070fbd LP |
5755 | c = unit_get_exec_context(u); |
5756 | if (c) { | |
5757 | (void) unit_export_log_level_max(u, c); | |
5758 | (void) unit_export_log_extra_fields(u, c); | |
5ac1530e ZJS |
5759 | (void) unit_export_log_ratelimit_interval(u, c); |
5760 | (void) unit_export_log_ratelimit_burst(u, c); | |
d3070fbd LP |
5761 | } |
5762 | } | |
5763 | ||
5764 | void unit_unlink_state_files(Unit *u) { | |
5765 | const char *p; | |
5766 | ||
5767 | assert(u); | |
5768 | ||
5769 | if (!u->id) | |
5770 | return; | |
5771 | ||
d3070fbd LP |
5772 | /* Undoes the effect of unit_export_state() */ |
5773 | ||
5774 | if (u->exported_invocation_id) { | |
2f8c48b6 AZ |
5775 | _cleanup_free_ char *invocation_path = NULL; |
5776 | int r = unit_get_invocation_path(u, &invocation_path); | |
5777 | if (r >= 0) { | |
5778 | (void) unlink(invocation_path); | |
5779 | u->exported_invocation_id = false; | |
5780 | } | |
d3070fbd LP |
5781 | } |
5782 | ||
2f8c48b6 AZ |
5783 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5784 | return; | |
5785 | ||
d3070fbd LP |
5786 | if (u->exported_log_level_max) { |
5787 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5788 | (void) unlink(p); | |
5789 | ||
5790 | u->exported_log_level_max = false; | |
5791 | } | |
5792 | ||
5793 | if (u->exported_log_extra_fields) { | |
5794 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5795 | (void) unlink(p); | |
5796 | ||
5797 | u->exported_log_extra_fields = false; | |
5798 | } | |
90fc172e | 5799 | |
5ac1530e | 5800 | if (u->exported_log_ratelimit_interval) { |
90fc172e AZ |
5801 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); |
5802 | (void) unlink(p); | |
5803 | ||
5ac1530e | 5804 | u->exported_log_ratelimit_interval = false; |
90fc172e AZ |
5805 | } |
5806 | ||
5ac1530e | 5807 | if (u->exported_log_ratelimit_burst) { |
90fc172e AZ |
5808 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); |
5809 | (void) unlink(p); | |
5810 | ||
5ac1530e | 5811 | u->exported_log_ratelimit_burst = false; |
90fc172e | 5812 | } |
d3070fbd | 5813 | } |
5afe510c | 5814 | |
3c7416b6 LP |
5815 | int unit_prepare_exec(Unit *u) { |
5816 | int r; | |
5817 | ||
5818 | assert(u); | |
5819 | ||
fab34748 KL |
5820 | /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable. |
5821 | * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */ | |
5822 | r = bpf_firewall_load_custom(u); | |
5823 | if (r < 0) | |
5824 | return r; | |
5825 | ||
3c7416b6 LP |
5826 | /* Prepares everything so that we can fork of a process for this unit */ |
5827 | ||
5828 | (void) unit_realize_cgroup(u); | |
5829 | ||
9cc54544 | 5830 | CGroupRuntime *crt = unit_get_cgroup_runtime(u); |
ad48cc6f | 5831 | if (crt && crt->reset_accounting) { |
9b2559a1 | 5832 | (void) unit_reset_accounting(u); |
9cc54544 | 5833 | crt->reset_accounting = false; |
3c7416b6 LP |
5834 | } |
5835 | ||
5836 | unit_export_state_files(u); | |
5837 | ||
5838 | r = unit_setup_exec_runtime(u); | |
5839 | if (r < 0) | |
5840 | return r; | |
5841 | ||
3c7416b6 LP |
5842 | return 0; |
5843 | } | |
5844 | ||
4c425434 LP |
5845 | static bool ignore_leftover_process(const char *comm) { |
5846 | return comm && comm[0] == '('; /* Most likely our own helper process (PAM?), ignore */ | |
5847 | } | |
5848 | ||
4d1b2df1 | 5849 | int unit_log_leftover_process_start(const PidRef *pid, int sig, void *userdata) { |
a4634b21 LP |
5850 | _cleanup_free_ char *comm = NULL; |
5851 | ||
4d1b2df1 LP |
5852 | assert(pidref_is_set(pid)); |
5853 | ||
5854 | (void) pidref_get_comm(pid, &comm); | |
a4634b21 | 5855 | |
4c425434 | 5856 | if (ignore_leftover_process(comm)) |
c53d2d54 | 5857 | return 0; |
a4634b21 | 5858 | |
4c425434 LP |
5859 | /* During start we print a warning */ |
5860 | ||
a4634b21 LP |
5861 | log_unit_warning(userdata, |
5862 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5863 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
4d1b2df1 | 5864 | pid->pid, strna(comm)); |
c53d2d54 DB |
5865 | |
5866 | return 1; | |
a4634b21 LP |
5867 | } |
5868 | ||
4d1b2df1 | 5869 | int unit_log_leftover_process_stop(const PidRef *pid, int sig, void *userdata) { |
4c425434 LP |
5870 | _cleanup_free_ char *comm = NULL; |
5871 | ||
4d1b2df1 LP |
5872 | assert(pidref_is_set(pid)); |
5873 | ||
5874 | (void) pidref_get_comm(pid, &comm); | |
4c425434 LP |
5875 | |
5876 | if (ignore_leftover_process(comm)) | |
5877 | return 0; | |
5878 | ||
5879 | /* During stop we only print an informational message */ | |
5880 | ||
5881 | log_unit_info(userdata, | |
5882 | "Unit process " PID_FMT " (%s) remains running after unit stopped.", | |
4d1b2df1 | 5883 | pid->pid, strna(comm)); |
4c425434 LP |
5884 | |
5885 | return 1; | |
5886 | } | |
5887 | ||
5888 | int unit_warn_leftover_processes(Unit *u, cg_kill_log_func_t log_func) { | |
a4634b21 LP |
5889 | assert(u); |
5890 | ||
5891 | (void) unit_pick_cgroup_path(u); | |
5892 | ||
9cc54544 LP |
5893 | CGroupRuntime *crt = unit_get_cgroup_runtime(u); |
5894 | ||
5895 | if (!crt || !crt->cgroup_path) | |
c53d2d54 | 5896 | return 0; |
a4634b21 | 5897 | |
bd1791b5 | 5898 | return cg_kill_recursive( |
9cc54544 | 5899 | crt->cgroup_path, |
bd1791b5 LP |
5900 | /* sig= */ 0, |
5901 | /* flags= */ 0, | |
5902 | /* set= */ NULL, | |
5903 | log_func, | |
5904 | u); | |
a4634b21 LP |
5905 | } |
5906 | ||
bb2c7685 LP |
5907 | bool unit_needs_console(Unit *u) { |
5908 | ExecContext *ec; | |
5909 | UnitActiveState state; | |
5910 | ||
5911 | assert(u); | |
5912 | ||
5913 | state = unit_active_state(u); | |
5914 | ||
5915 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5916 | return false; | |
5917 | ||
5918 | if (UNIT_VTABLE(u)->needs_console) | |
5919 | return UNIT_VTABLE(u)->needs_console(u); | |
5920 | ||
5921 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5922 | ec = unit_get_exec_context(u); | |
5923 | if (!ec) | |
5924 | return false; | |
5925 | ||
5926 | return exec_context_may_touch_console(ec); | |
5927 | } | |
5928 | ||
d70dfe1b | 5929 | int unit_pid_attachable(Unit *u, const PidRef *pid, sd_bus_error *error) { |
6592b975 LP |
5930 | int r; |
5931 | ||
5932 | assert(u); | |
5933 | ||
5934 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5935 | * and not a kernel thread either */ | |
5936 | ||
5937 | /* First, a simple range check */ | |
495e75ed LP |
5938 | if (!pidref_is_set(pid)) |
5939 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier is not valid."); | |
6592b975 LP |
5940 | |
5941 | /* Some extra safety check */ | |
a7a87769 | 5942 | if (pid->pid == 1 || pidref_is_self(pid)) |
495e75ed | 5943 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager process, refusing.", pid->pid); |
6592b975 LP |
5944 | |
5945 | /* Don't even begin to bother with kernel threads */ | |
fc87713b | 5946 | r = pidref_is_kernel_thread(pid); |
6592b975 | 5947 | if (r == -ESRCH) |
495e75ed | 5948 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid->pid); |
6592b975 | 5949 | if (r < 0) |
495e75ed | 5950 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid->pid); |
6592b975 | 5951 | if (r > 0) |
495e75ed | 5952 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid->pid); |
6592b975 LP |
5953 | |
5954 | return 0; | |
5955 | } | |
5956 | ||
523ee2d4 LP |
5957 | void unit_log_success(Unit *u) { |
5958 | assert(u); | |
5959 | ||
edf2ee22 JM |
5960 | /* Let's show message "Deactivated successfully" in debug mode (when manager is user) rather than in info mode. |
5961 | * This message has low information value for regular users and it might be a bit overwhelming on a system with | |
5962 | * a lot of devices. */ | |
5963 | log_unit_struct(u, | |
5964 | MANAGER_IS_USER(u->manager) ? LOG_DEBUG : LOG_INFO, | |
c2503e35 RH |
5965 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR, |
5966 | LOG_UNIT_INVOCATION_ID(u), | |
5967 | LOG_UNIT_MESSAGE(u, "Deactivated successfully.")); | |
523ee2d4 LP |
5968 | } |
5969 | ||
7c047d74 LP |
5970 | void unit_log_failure(Unit *u, const char *result) { |
5971 | assert(u); | |
5972 | assert(result); | |
5973 | ||
c2503e35 RH |
5974 | log_unit_struct(u, LOG_WARNING, |
5975 | "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR, | |
5976 | LOG_UNIT_INVOCATION_ID(u), | |
5977 | LOG_UNIT_MESSAGE(u, "Failed with result '%s'.", result), | |
5978 | "UNIT_RESULT=%s", result); | |
7c047d74 LP |
5979 | } |
5980 | ||
31cd5f63 AZ |
5981 | void unit_log_skip(Unit *u, const char *result) { |
5982 | assert(u); | |
5983 | assert(result); | |
5984 | ||
c2503e35 RH |
5985 | log_unit_struct(u, LOG_INFO, |
5986 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR, | |
5987 | LOG_UNIT_INVOCATION_ID(u), | |
5988 | LOG_UNIT_MESSAGE(u, "Skipped due to '%s'.", result), | |
5989 | "UNIT_RESULT=%s", result); | |
31cd5f63 AZ |
5990 | } |
5991 | ||
91bbd9b7 LP |
5992 | void unit_log_process_exit( |
5993 | Unit *u, | |
91bbd9b7 LP |
5994 | const char *kind, |
5995 | const char *command, | |
5cc2cd1c | 5996 | bool success, |
91bbd9b7 LP |
5997 | int code, |
5998 | int status) { | |
5999 | ||
5cc2cd1c ZJS |
6000 | int level; |
6001 | ||
91bbd9b7 LP |
6002 | assert(u); |
6003 | assert(kind); | |
6004 | ||
5cc2cd1c ZJS |
6005 | /* If this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure |
6006 | * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption | |
6007 | * that the service already logged the reason at a higher log level on its own. Otherwise, make it a | |
6008 | * WARNING. */ | |
6009 | if (success) | |
6010 | level = LOG_DEBUG; | |
6011 | else if (code == CLD_EXITED) | |
6012 | level = LOG_NOTICE; | |
6013 | else | |
91bbd9b7 LP |
6014 | level = LOG_WARNING; |
6015 | ||
c2503e35 RH |
6016 | log_unit_struct(u, level, |
6017 | "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR, | |
58441bc1 | 6018 | LOG_UNIT_MESSAGE(u, "%s exited, code=%s, status=%i/%s%s", |
c2503e35 RH |
6019 | kind, |
6020 | sigchld_code_to_string(code), status, | |
6021 | strna(code == CLD_EXITED | |
6022 | ? exit_status_to_string(status, EXIT_STATUS_FULL) | |
58441bc1 ZJS |
6023 | : signal_to_string(status)), |
6024 | success ? " (success)" : ""), | |
c2503e35 RH |
6025 | "EXIT_CODE=%s", sigchld_code_to_string(code), |
6026 | "EXIT_STATUS=%i", status, | |
6027 | "COMMAND=%s", strna(command), | |
6028 | LOG_UNIT_INVOCATION_ID(u)); | |
91bbd9b7 LP |
6029 | } |
6030 | ||
7af67e9a LP |
6031 | int unit_exit_status(Unit *u) { |
6032 | assert(u); | |
6033 | ||
6034 | /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range | |
6035 | * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA | |
6036 | * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main | |
6037 | * service process has exited abnormally (signal/coredump). */ | |
6038 | ||
6039 | if (!UNIT_VTABLE(u)->exit_status) | |
6040 | return -EOPNOTSUPP; | |
6041 | ||
6042 | return UNIT_VTABLE(u)->exit_status(u); | |
6043 | } | |
6044 | ||
6045 | int unit_failure_action_exit_status(Unit *u) { | |
6046 | int r; | |
6047 | ||
6048 | assert(u); | |
6049 | ||
6050 | /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */ | |
6051 | ||
6052 | if (u->failure_action_exit_status >= 0) | |
6053 | return u->failure_action_exit_status; | |
6054 | ||
6055 | r = unit_exit_status(u); | |
6056 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
6057 | return 255; | |
6058 | ||
6059 | return r; | |
6060 | } | |
6061 | ||
6062 | int unit_success_action_exit_status(Unit *u) { | |
6063 | int r; | |
6064 | ||
6065 | assert(u); | |
6066 | ||
6067 | /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */ | |
6068 | ||
6069 | if (u->success_action_exit_status >= 0) | |
6070 | return u->success_action_exit_status; | |
6071 | ||
6072 | r = unit_exit_status(u); | |
6073 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
6074 | return 255; | |
6075 | ||
6076 | return r; | |
6077 | } | |
6078 | ||
a4191c9f LP |
6079 | int unit_test_trigger_loaded(Unit *u) { |
6080 | Unit *trigger; | |
6081 | ||
6082 | /* Tests whether the unit to trigger is loaded */ | |
6083 | ||
6084 | trigger = UNIT_TRIGGER(u); | |
6085 | if (!trigger) | |
e7b9f4d9 ZJS |
6086 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
6087 | "Refusing to start, no unit to trigger."); | |
a4191c9f | 6088 | if (trigger->load_state != UNIT_LOADED) |
e7b9f4d9 ZJS |
6089 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
6090 | "Refusing to start, unit %s to trigger not loaded.", trigger->id); | |
a4191c9f LP |
6091 | |
6092 | return 0; | |
6093 | } | |
6094 | ||
bb0c0d6f LP |
6095 | void unit_destroy_runtime_data(Unit *u, const ExecContext *context) { |
6096 | assert(u); | |
6097 | assert(context); | |
6098 | ||
1ba84fef LP |
6099 | /* EXEC_PRESERVE_RESTART is handled via unit_release_resources()! */ |
6100 | if (context->runtime_directory_preserve_mode == EXEC_PRESERVE_NO) | |
95939aed | 6101 | exec_context_destroy_runtime_directory(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME]); |
bb0c0d6f | 6102 | |
1e122561 | 6103 | exec_context_destroy_credentials(u); |
b9f976fb | 6104 | exec_context_destroy_mount_ns_dir(u); |
95939aed YW |
6105 | } |
6106 | ||
380dc8b0 LP |
6107 | int unit_clean(Unit *u, ExecCleanMask mask) { |
6108 | UnitActiveState state; | |
6109 | ||
6110 | assert(u); | |
6111 | ||
6112 | /* Special return values: | |
6113 | * | |
6114 | * -EOPNOTSUPP → cleaning not supported for this unit type | |
6115 | * -EUNATCH → cleaning not defined for this resource type | |
6116 | * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has | |
6117 | * a job queued or similar | |
6118 | */ | |
6119 | ||
6120 | if (!UNIT_VTABLE(u)->clean) | |
6121 | return -EOPNOTSUPP; | |
6122 | ||
6123 | if (mask == 0) | |
6124 | return -EUNATCH; | |
6125 | ||
6126 | if (u->load_state != UNIT_LOADED) | |
6127 | return -EBUSY; | |
6128 | ||
6129 | if (u->job) | |
6130 | return -EBUSY; | |
6131 | ||
6132 | state = unit_active_state(u); | |
4f06325c | 6133 | if (state != UNIT_INACTIVE) |
380dc8b0 LP |
6134 | return -EBUSY; |
6135 | ||
6136 | return UNIT_VTABLE(u)->clean(u, mask); | |
6137 | } | |
6138 | ||
6139 | int unit_can_clean(Unit *u, ExecCleanMask *ret) { | |
6140 | assert(u); | |
6141 | ||
6142 | if (!UNIT_VTABLE(u)->clean || | |
6143 | u->load_state != UNIT_LOADED) { | |
6144 | *ret = 0; | |
6145 | return 0; | |
6146 | } | |
6147 | ||
6148 | /* When the clean() method is set, can_clean() really should be set too */ | |
6149 | assert(UNIT_VTABLE(u)->can_clean); | |
6150 | ||
6151 | return UNIT_VTABLE(u)->can_clean(u, ret); | |
6152 | } | |
6153 | ||
f882c102 DDM |
6154 | bool unit_can_start_refuse_manual(Unit *u) { |
6155 | return unit_can_start(u) && !u->refuse_manual_start; | |
6156 | } | |
6157 | ||
6158 | bool unit_can_stop_refuse_manual(Unit *u) { | |
6159 | return unit_can_stop(u) && !u->refuse_manual_stop; | |
6160 | } | |
6161 | ||
6162 | bool unit_can_isolate_refuse_manual(Unit *u) { | |
6163 | return unit_can_isolate(u) && !u->refuse_manual_start; | |
6164 | } | |
6165 | ||
16b6af6a AV |
6166 | void unit_next_freezer_state(Unit *u, FreezerAction action, FreezerState *ret, FreezerState *ret_target) { |
6167 | Unit *slice; | |
6168 | FreezerState curr, parent, next, tgt; | |
6169 | ||
6170 | assert(u); | |
6171 | assert(IN_SET(action, FREEZER_FREEZE, FREEZER_PARENT_FREEZE, | |
6172 | FREEZER_THAW, FREEZER_PARENT_THAW)); | |
6173 | assert(ret); | |
6174 | assert(ret_target); | |
6175 | ||
197e77c5 | 6176 | /* This function determines the correct freezer state transitions for a unit |
16b6af6a AV |
6177 | * given the action being requested. It returns the next state, and also the "target", |
6178 | * which is either FREEZER_FROZEN or FREEZER_RUNNING, depending on what actual state we | |
6179 | * ultimately want to achieve. */ | |
6180 | ||
6181 | curr = u->freezer_state; | |
6182 | slice = UNIT_GET_SLICE(u); | |
6183 | if (slice) | |
6184 | parent = slice->freezer_state; | |
6185 | else | |
6186 | parent = FREEZER_RUNNING; | |
6187 | ||
6188 | if (action == FREEZER_FREEZE) { | |
6189 | /* We always "promote" a freeze initiated by parent into a normal freeze */ | |
6190 | if (IN_SET(curr, FREEZER_FROZEN, FREEZER_FROZEN_BY_PARENT)) | |
6191 | next = FREEZER_FROZEN; | |
6192 | else | |
6193 | next = FREEZER_FREEZING; | |
6194 | } else if (action == FREEZER_THAW) { | |
6195 | /* Thawing is the most complicated operation here, because we can't thaw a unit | |
6196 | * if its parent is frozen. So we instead "demote" a normal freeze into a freeze | |
6197 | * initiated by parent if the parent is frozen */ | |
6198 | if (IN_SET(curr, FREEZER_RUNNING, FREEZER_THAWING, FREEZER_FREEZING_BY_PARENT, FREEZER_FROZEN_BY_PARENT)) | |
6199 | next = curr; | |
6200 | else if (curr == FREEZER_FREEZING) { | |
6201 | if (IN_SET(parent, FREEZER_RUNNING, FREEZER_THAWING)) | |
6202 | next = FREEZER_THAWING; | |
6203 | else | |
6204 | next = FREEZER_FREEZING_BY_PARENT; | |
6205 | } else { | |
6206 | assert(curr == FREEZER_FROZEN); | |
6207 | if (IN_SET(parent, FREEZER_RUNNING, FREEZER_THAWING)) | |
6208 | next = FREEZER_THAWING; | |
6209 | else | |
6210 | next = FREEZER_FROZEN_BY_PARENT; | |
6211 | } | |
6212 | } else if (action == FREEZER_PARENT_FREEZE) { | |
6213 | /* We need to avoid accidentally demoting units frozen manually */ | |
6214 | if (IN_SET(curr, FREEZER_FREEZING, FREEZER_FROZEN, FREEZER_FROZEN_BY_PARENT)) | |
6215 | next = curr; | |
6216 | else | |
6217 | next = FREEZER_FREEZING_BY_PARENT; | |
6218 | } else { | |
6219 | assert(action == FREEZER_PARENT_THAW); | |
6220 | ||
6221 | /* We don't want to thaw units from a parent if they were frozen | |
6222 | * manually, so for such units this action is a no-op */ | |
6223 | if (IN_SET(curr, FREEZER_RUNNING, FREEZER_FREEZING, FREEZER_FROZEN)) | |
6224 | next = curr; | |
6225 | else | |
6226 | next = FREEZER_THAWING; | |
6227 | } | |
6228 | ||
6229 | tgt = freezer_state_finish(next); | |
6230 | if (tgt == FREEZER_FROZEN_BY_PARENT) | |
6231 | tgt = FREEZER_FROZEN; | |
6232 | assert(IN_SET(tgt, FREEZER_RUNNING, FREEZER_FROZEN)); | |
6233 | ||
6234 | *ret = next; | |
6235 | *ret_target = tgt; | |
6236 | } | |
6237 | ||
d9e45bc3 MS |
6238 | bool unit_can_freeze(Unit *u) { |
6239 | assert(u); | |
6240 | ||
16b6af6a AV |
6241 | if (unit_has_name(u, SPECIAL_ROOT_SLICE) || unit_has_name(u, SPECIAL_INIT_SCOPE)) |
6242 | return false; | |
6243 | ||
d9e45bc3 MS |
6244 | if (UNIT_VTABLE(u)->can_freeze) |
6245 | return UNIT_VTABLE(u)->can_freeze(u); | |
6246 | ||
16b6af6a | 6247 | return UNIT_VTABLE(u)->freezer_action; |
d9e45bc3 MS |
6248 | } |
6249 | ||
6250 | void unit_frozen(Unit *u) { | |
6251 | assert(u); | |
6252 | ||
16b6af6a AV |
6253 | u->freezer_state = u->freezer_state == FREEZER_FREEZING_BY_PARENT |
6254 | ? FREEZER_FROZEN_BY_PARENT | |
6255 | : FREEZER_FROZEN; | |
6256 | ||
6257 | log_unit_debug(u, "Unit now %s.", freezer_state_to_string(u->freezer_state)); | |
d9e45bc3 | 6258 | |
3d19e122 | 6259 | bus_unit_send_pending_freezer_message(u, false); |
d9e45bc3 MS |
6260 | } |
6261 | ||
6262 | void unit_thawed(Unit *u) { | |
6263 | assert(u); | |
6264 | ||
6265 | u->freezer_state = FREEZER_RUNNING; | |
6266 | ||
16b6af6a AV |
6267 | log_unit_debug(u, "Unit thawed."); |
6268 | ||
3d19e122 | 6269 | bus_unit_send_pending_freezer_message(u, false); |
d9e45bc3 MS |
6270 | } |
6271 | ||
16b6af6a | 6272 | int unit_freezer_action(Unit *u, FreezerAction action) { |
d9e45bc3 | 6273 | UnitActiveState s; |
d9e45bc3 MS |
6274 | int r; |
6275 | ||
6276 | assert(u); | |
6277 | assert(IN_SET(action, FREEZER_FREEZE, FREEZER_THAW)); | |
6278 | ||
16b6af6a | 6279 | if (!cg_freezer_supported() || !unit_can_freeze(u)) |
d9e45bc3 MS |
6280 | return -EOPNOTSUPP; |
6281 | ||
6282 | if (u->job) | |
6283 | return -EBUSY; | |
6284 | ||
6285 | if (u->load_state != UNIT_LOADED) | |
6286 | return -EHOSTDOWN; | |
6287 | ||
6288 | s = unit_active_state(u); | |
6289 | if (s != UNIT_ACTIVE) | |
6290 | return -EHOSTDOWN; | |
6291 | ||
16b6af6a AV |
6292 | if (action == FREEZER_FREEZE && IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_FREEZING_BY_PARENT)) |
6293 | return -EALREADY; | |
6294 | if (action == FREEZER_THAW && u->freezer_state == FREEZER_THAWING) | |
d9e45bc3 | 6295 | return -EALREADY; |
16b6af6a AV |
6296 | if (action == FREEZER_THAW && IN_SET(u->freezer_state, FREEZER_FREEZING_BY_PARENT, FREEZER_FROZEN_BY_PARENT)) |
6297 | return -ECHILD; | |
d9e45bc3 | 6298 | |
16b6af6a | 6299 | r = UNIT_VTABLE(u)->freezer_action(u, action); |
d9e45bc3 MS |
6300 | if (r <= 0) |
6301 | return r; | |
6302 | ||
16b6af6a | 6303 | assert(IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_FREEZING_BY_PARENT, FREEZER_THAWING)); |
d9e45bc3 MS |
6304 | return 1; |
6305 | } | |
6306 | ||
6e548561 | 6307 | Condition *unit_find_failed_condition(Unit *u) { |
03677889 | 6308 | Condition *failed_trigger = NULL; |
6e548561 DDM |
6309 | bool has_succeeded_trigger = false; |
6310 | ||
6311 | if (u->condition_result) | |
6312 | return NULL; | |
6313 | ||
6314 | LIST_FOREACH(conditions, c, u->conditions) | |
6315 | if (c->trigger) { | |
6316 | if (c->result == CONDITION_SUCCEEDED) | |
6317 | has_succeeded_trigger = true; | |
6318 | else if (!failed_trigger) | |
6319 | failed_trigger = c; | |
6320 | } else if (c->result != CONDITION_SUCCEEDED) | |
6321 | return c; | |
6322 | ||
6323 | return failed_trigger && !has_succeeded_trigger ? failed_trigger : NULL; | |
6324 | } | |
6325 | ||
5afe510c | 6326 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
17f6b640 | 6327 | [COLLECT_INACTIVE] = "inactive", |
5afe510c LP |
6328 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", |
6329 | }; | |
6330 | ||
6331 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); | |
15ed3c3a LP |
6332 | |
6333 | Unit* unit_has_dependency(const Unit *u, UnitDependencyAtom atom, Unit *other) { | |
6334 | Unit *i; | |
6335 | ||
6336 | assert(u); | |
6337 | ||
6338 | /* Checks if the unit has a dependency on 'other' with the specified dependency atom. If 'other' is | |
6339 | * NULL checks if the unit has *any* dependency of that atom. Returns 'other' if found (or if 'other' | |
6340 | * is NULL the first entry found), or NULL if not found. */ | |
6341 | ||
6342 | UNIT_FOREACH_DEPENDENCY(i, u, atom) | |
6343 | if (!other || other == i) | |
6344 | return i; | |
6345 | ||
6346 | return NULL; | |
6347 | } | |
6348 | ||
6349 | int unit_get_dependency_array(const Unit *u, UnitDependencyAtom atom, Unit ***ret_array) { | |
6350 | _cleanup_free_ Unit **array = NULL; | |
6351 | size_t n = 0; | |
6352 | Unit *other; | |
6353 | ||
6354 | assert(u); | |
6355 | assert(ret_array); | |
6356 | ||
6357 | /* Gets a list of units matching a specific atom as array. This is useful when iterating through | |
6358 | * dependencies while modifying them: the array is an "atomic snapshot" of sorts, that can be read | |
48008c1c | 6359 | * while the dependency table is continuously updated. */ |
15ed3c3a LP |
6360 | |
6361 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
6362 | if (!GREEDY_REALLOC(array, n + 1)) | |
6363 | return -ENOMEM; | |
6364 | ||
6365 | array[n++] = other; | |
6366 | } | |
6367 | ||
6368 | *ret_array = TAKE_PTR(array); | |
6369 | ||
6370 | assert(n <= INT_MAX); | |
6371 | return (int) n; | |
6372 | } | |
48b92b37 | 6373 | |
83123a44 YW |
6374 | int unit_get_transitive_dependency_set(Unit *u, UnitDependencyAtom atom, Set **ret) { |
6375 | _cleanup_set_free_ Set *units = NULL, *queue = NULL; | |
6376 | Unit *other; | |
6377 | int r; | |
6378 | ||
6379 | assert(u); | |
6380 | assert(ret); | |
6381 | ||
6382 | /* Similar to unit_get_dependency_array(), but also search the same dependency in other units. */ | |
6383 | ||
6384 | do { | |
6385 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
6386 | r = set_ensure_put(&units, NULL, other); | |
6387 | if (r < 0) | |
6388 | return r; | |
6389 | if (r == 0) | |
6390 | continue; | |
6391 | r = set_ensure_put(&queue, NULL, other); | |
6392 | if (r < 0) | |
6393 | return r; | |
6394 | } | |
6395 | } while ((u = set_steal_first(queue))); | |
6396 | ||
6397 | *ret = TAKE_PTR(units); | |
6398 | return 0; | |
6399 | } | |
6400 | ||
e9276800 LP |
6401 | int unit_arm_timer( |
6402 | Unit *u, | |
6403 | sd_event_source **source, | |
6404 | bool relative, | |
6405 | usec_t usec, | |
6406 | sd_event_time_handler_t handler) { | |
6407 | ||
6408 | int r; | |
6409 | ||
6410 | assert(u); | |
6411 | assert(source); | |
6412 | assert(handler); | |
6413 | ||
6414 | if (*source) { | |
6415 | if (usec == USEC_INFINITY) | |
6416 | return sd_event_source_set_enabled(*source, SD_EVENT_OFF); | |
6417 | ||
6418 | r = (relative ? sd_event_source_set_time_relative : sd_event_source_set_time)(*source, usec); | |
6419 | if (r < 0) | |
6420 | return r; | |
6421 | ||
6422 | return sd_event_source_set_enabled(*source, SD_EVENT_ONESHOT); | |
6423 | } | |
6424 | ||
6425 | if (usec == USEC_INFINITY) | |
6426 | return 0; | |
6427 | ||
6428 | r = (relative ? sd_event_add_time_relative : sd_event_add_time)( | |
6429 | u->manager->event, | |
6430 | source, | |
6431 | CLOCK_MONOTONIC, | |
6432 | usec, 0, | |
6433 | handler, | |
6434 | u); | |
6435 | if (r < 0) | |
6436 | return r; | |
6437 | ||
6438 | const char *d = strjoina(unit_type_to_string(u->type), "-timer"); | |
6439 | (void) sd_event_source_set_description(*source, d); | |
6440 | ||
6441 | return 0; | |
6442 | } | |
6443 | ||
a8157796 LP |
6444 | static int unit_get_nice(Unit *u) { |
6445 | ExecContext *ec; | |
6446 | ||
6447 | ec = unit_get_exec_context(u); | |
6448 | return ec ? ec->nice : 0; | |
6449 | } | |
6450 | ||
6451 | static uint64_t unit_get_cpu_weight(Unit *u) { | |
6452 | CGroupContext *cc; | |
6453 | ||
6454 | cc = unit_get_cgroup_context(u); | |
6455 | return cc ? cgroup_context_cpu_weight(cc, manager_state(u->manager)) : CGROUP_WEIGHT_DEFAULT; | |
6456 | } | |
6457 | ||
6458 | int unit_compare_priority(Unit *a, Unit *b) { | |
6459 | int ret; | |
6460 | ||
6461 | ret = CMP(a->type, b->type); | |
6462 | if (ret != 0) | |
6463 | return -ret; | |
6464 | ||
6465 | ret = CMP(unit_get_cpu_weight(a), unit_get_cpu_weight(b)); | |
6466 | if (ret != 0) | |
6467 | return -ret; | |
6468 | ||
6469 | ret = CMP(unit_get_nice(a), unit_get_nice(b)); | |
6470 | if (ret != 0) | |
6471 | return ret; | |
6472 | ||
6473 | return strcmp(a->id, b->id); | |
6474 | } | |
6475 | ||
48b92b37 | 6476 | const ActivationDetailsVTable * const activation_details_vtable[_UNIT_TYPE_MAX] = { |
17f6b640 | 6477 | [UNIT_PATH] = &activation_details_path_vtable, |
c8bc7519 | 6478 | [UNIT_TIMER] = &activation_details_timer_vtable, |
48b92b37 LB |
6479 | }; |
6480 | ||
6481 | ActivationDetails *activation_details_new(Unit *trigger_unit) { | |
6482 | _cleanup_free_ ActivationDetails *details = NULL; | |
6483 | ||
6484 | assert(trigger_unit); | |
6485 | assert(trigger_unit->type != _UNIT_TYPE_INVALID); | |
6486 | assert(trigger_unit->id); | |
6487 | ||
6488 | details = malloc0(activation_details_vtable[trigger_unit->type]->object_size); | |
6489 | if (!details) | |
6490 | return NULL; | |
6491 | ||
6492 | *details = (ActivationDetails) { | |
6493 | .n_ref = 1, | |
6494 | .trigger_unit_type = trigger_unit->type, | |
6495 | }; | |
6496 | ||
6497 | details->trigger_unit_name = strdup(trigger_unit->id); | |
6498 | if (!details->trigger_unit_name) | |
6499 | return NULL; | |
6500 | ||
6501 | if (ACTIVATION_DETAILS_VTABLE(details)->init) | |
6502 | ACTIVATION_DETAILS_VTABLE(details)->init(details, trigger_unit); | |
6503 | ||
6504 | return TAKE_PTR(details); | |
6505 | } | |
6506 | ||
6507 | static ActivationDetails *activation_details_free(ActivationDetails *details) { | |
6508 | if (!details) | |
6509 | return NULL; | |
6510 | ||
6511 | if (ACTIVATION_DETAILS_VTABLE(details)->done) | |
6512 | ACTIVATION_DETAILS_VTABLE(details)->done(details); | |
6513 | ||
6514 | free(details->trigger_unit_name); | |
6515 | ||
6516 | return mfree(details); | |
6517 | } | |
6518 | ||
6519 | void activation_details_serialize(ActivationDetails *details, FILE *f) { | |
6520 | if (!details || details->trigger_unit_type == _UNIT_TYPE_INVALID) | |
6521 | return; | |
6522 | ||
6523 | (void) serialize_item(f, "activation-details-unit-type", unit_type_to_string(details->trigger_unit_type)); | |
6524 | if (details->trigger_unit_name) | |
6525 | (void) serialize_item(f, "activation-details-unit-name", details->trigger_unit_name); | |
6526 | if (ACTIVATION_DETAILS_VTABLE(details)->serialize) | |
6527 | ACTIVATION_DETAILS_VTABLE(details)->serialize(details, f); | |
6528 | } | |
6529 | ||
6530 | int activation_details_deserialize(const char *key, const char *value, ActivationDetails **details) { | |
e8dba806 FS |
6531 | int r; |
6532 | ||
48b92b37 LB |
6533 | assert(key); |
6534 | assert(value); | |
6535 | assert(details); | |
6536 | ||
6537 | if (!*details) { | |
6538 | UnitType t; | |
6539 | ||
6540 | if (!streq(key, "activation-details-unit-type")) | |
6541 | return -EINVAL; | |
6542 | ||
6543 | t = unit_type_from_string(value); | |
210cb8d6 YW |
6544 | if (t < 0) |
6545 | return t; | |
6546 | ||
6547 | /* The activation details vtable has defined ops only for path and timer units */ | |
6548 | if (!activation_details_vtable[t]) | |
48b92b37 LB |
6549 | return -EINVAL; |
6550 | ||
6551 | *details = malloc0(activation_details_vtable[t]->object_size); | |
6552 | if (!*details) | |
6553 | return -ENOMEM; | |
6554 | ||
6555 | **details = (ActivationDetails) { | |
6556 | .n_ref = 1, | |
6557 | .trigger_unit_type = t, | |
6558 | }; | |
6559 | ||
6560 | return 0; | |
6561 | } | |
6562 | ||
6563 | if (streq(key, "activation-details-unit-name")) { | |
e8dba806 FS |
6564 | r = free_and_strdup(&(*details)->trigger_unit_name, value); |
6565 | if (r < 0) | |
6566 | return r; | |
48b92b37 LB |
6567 | |
6568 | return 0; | |
6569 | } | |
6570 | ||
6571 | if (ACTIVATION_DETAILS_VTABLE(*details)->deserialize) | |
6572 | return ACTIVATION_DETAILS_VTABLE(*details)->deserialize(key, value, details); | |
6573 | ||
6574 | return -EINVAL; | |
6575 | } | |
6576 | ||
6577 | int activation_details_append_env(ActivationDetails *details, char ***strv) { | |
6578 | int r = 0; | |
6579 | ||
6580 | assert(strv); | |
6581 | ||
6582 | if (!details) | |
6583 | return 0; | |
6584 | ||
6585 | if (!isempty(details->trigger_unit_name)) { | |
6586 | char *s = strjoin("TRIGGER_UNIT=", details->trigger_unit_name); | |
6587 | if (!s) | |
6588 | return -ENOMEM; | |
6589 | ||
6590 | r = strv_consume(strv, TAKE_PTR(s)); | |
6591 | if (r < 0) | |
6592 | return r; | |
6593 | } | |
6594 | ||
6595 | if (ACTIVATION_DETAILS_VTABLE(details)->append_env) { | |
6596 | r = ACTIVATION_DETAILS_VTABLE(details)->append_env(details, strv); | |
6597 | if (r < 0) | |
6598 | return r; | |
6599 | } | |
6600 | ||
6601 | return r + !isempty(details->trigger_unit_name); /* Return the number of variables added to the env block */ | |
6602 | } | |
6603 | ||
6604 | int activation_details_append_pair(ActivationDetails *details, char ***strv) { | |
6605 | int r = 0; | |
6606 | ||
6607 | assert(strv); | |
6608 | ||
6609 | if (!details) | |
6610 | return 0; | |
6611 | ||
6612 | if (!isempty(details->trigger_unit_name)) { | |
69f3c619 | 6613 | r = strv_extend_many(strv, "trigger_unit", details->trigger_unit_name); |
48b92b37 LB |
6614 | if (r < 0) |
6615 | return r; | |
6616 | } | |
6617 | ||
18cf8411 | 6618 | if (ACTIVATION_DETAILS_VTABLE(details)->append_pair) { |
48b92b37 LB |
6619 | r = ACTIVATION_DETAILS_VTABLE(details)->append_pair(details, strv); |
6620 | if (r < 0) | |
6621 | return r; | |
6622 | } | |
6623 | ||
6624 | return r + !isempty(details->trigger_unit_name); /* Return the number of pairs added to the strv */ | |
6625 | } | |
6626 | ||
6627 | DEFINE_TRIVIAL_REF_UNREF_FUNC(ActivationDetails, activation_details, activation_details_free); | |
9e615fa3 LB |
6628 | |
6629 | static const char* const unit_mount_dependency_type_table[_UNIT_MOUNT_DEPENDENCY_TYPE_MAX] = { | |
6630 | [UNIT_MOUNT_WANTS] = "WantsMountsFor", | |
6631 | [UNIT_MOUNT_REQUIRES] = "RequiresMountsFor", | |
6632 | }; | |
6633 | ||
6634 | DEFINE_STRING_TABLE_LOOKUP(unit_mount_dependency_type, UnitMountDependencyType); | |
6635 | ||
6636 | UnitDependency unit_mount_dependency_type_to_dependency_type(UnitMountDependencyType t) { | |
6637 | switch (t) { | |
6638 | ||
6639 | case UNIT_MOUNT_WANTS: | |
6640 | return UNIT_WANTS; | |
6641 | ||
6642 | case UNIT_MOUNT_REQUIRES: | |
6643 | return UNIT_REQUIRES; | |
6644 | ||
6645 | default: | |
6646 | assert_not_reached(); | |
6647 | } | |
6648 | } |