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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" |
2d3b784d | 36 | #include "io-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 ZJS |
69 | /* Thresholds for logging at INFO level about resource consumption */ |
70 | #define MENTIONWORTHY_CPU_NSEC (1 * NSEC_PER_SEC) | |
71 | #define MENTIONWORTHY_IO_BYTES (1024 * 1024ULL) | |
72 | #define MENTIONWORTHY_IP_BYTES (0ULL) | |
73 | ||
74 | /* Thresholds for logging at INFO level about resource consumption */ | |
75 | #define NOTICEWORTHY_CPU_NSEC (10*60 * NSEC_PER_SEC) /* 10 minutes */ | |
76 | #define NOTICEWORTHY_IO_BYTES (10 * 1024 * 1024ULL) /* 10 MB */ | |
77 | #define NOTICEWORTHY_IP_BYTES (128 * 1024 * 1024ULL) /* 128 MB */ | |
78 | ||
87f0e418 LP |
79 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { |
80 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 LP |
81 | [UNIT_SOCKET] = &socket_vtable, |
82 | [UNIT_TARGET] = &target_vtable, | |
83 | [UNIT_DEVICE] = &device_vtable, | |
84 | [UNIT_MOUNT] = &mount_vtable, | |
85 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 86 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 87 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 88 | [UNIT_PATH] = &path_vtable, |
6c12b52e | 89 | [UNIT_SLICE] = &slice_vtable, |
5afe510c | 90 | [UNIT_SCOPE] = &scope_vtable, |
87f0e418 LP |
91 | }; |
92 | ||
75db809a | 93 | Unit* unit_new(Manager *m, size_t size) { |
87f0e418 LP |
94 | Unit *u; |
95 | ||
96 | assert(m); | |
ac155bb8 | 97 | assert(size >= sizeof(Unit)); |
87f0e418 | 98 | |
7d17cfbc MS |
99 | u = malloc0(size); |
100 | if (!u) | |
87f0e418 LP |
101 | return NULL; |
102 | ||
ac155bb8 MS |
103 | u->manager = m; |
104 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
105 | u->default_dependencies = true; |
106 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 107 | u->unit_file_preset = -1; |
d420282b | 108 | u->on_failure_job_mode = JOB_REPLACE; |
294446dc | 109 | u->on_success_job_mode = JOB_FAIL; |
0bb814c2 | 110 | u->cgroup_control_inotify_wd = -1; |
afcfaa69 | 111 | u->cgroup_memory_inotify_wd = -1; |
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; | |
fe700f46 | 116 | u->cpu_usage_last = NSEC_INFINITY; |
17f14955 | 117 | u->cgroup_invalidated_mask |= CGROUP_MASK_BPF_FIREWALL; |
7af67e9a | 118 | u->failure_action_exit_status = u->success_action_exit_status = -1; |
87f0e418 | 119 | |
254d1313 ZJS |
120 | u->ip_accounting_ingress_map_fd = -EBADF; |
121 | u->ip_accounting_egress_map_fd = -EBADF; | |
0fd9c28c LP |
122 | for (CGroupIOAccountingMetric i = 0; i < _CGROUP_IO_ACCOUNTING_METRIC_MAX; i++) |
123 | u->io_accounting_last[i] = UINT64_MAX; | |
124 | ||
254d1313 ZJS |
125 | u->ipv4_allow_map_fd = -EBADF; |
126 | u->ipv6_allow_map_fd = -EBADF; | |
127 | u->ipv4_deny_map_fd = -EBADF; | |
128 | u->ipv6_deny_map_fd = -EBADF; | |
6a48d82f | 129 | |
2e59b241 LP |
130 | u->last_section_private = -1; |
131 | ||
c9e120e0 LP |
132 | u->start_ratelimit = (RateLimit) { |
133 | m->defaults.start_limit_interval, | |
134 | m->defaults.start_limit_burst | |
135 | }; | |
136 | ||
137 | u->auto_start_stop_ratelimit = (const RateLimit) { | |
138 | 10 * USEC_PER_SEC, | |
139 | 16 | |
140 | }; | |
bea355da | 141 | |
87f0e418 LP |
142 | return u; |
143 | } | |
144 | ||
a581e45a | 145 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
dc409696 | 146 | _cleanup_(unit_freep) Unit *u = NULL; |
a581e45a LP |
147 | int r; |
148 | ||
149 | u = unit_new(m, size); | |
150 | if (!u) | |
151 | return -ENOMEM; | |
152 | ||
153 | r = unit_add_name(u, name); | |
dc409696 | 154 | if (r < 0) |
a581e45a | 155 | return r; |
a581e45a | 156 | |
1cc6c93a YW |
157 | *ret = TAKE_PTR(u); |
158 | ||
a581e45a LP |
159 | return r; |
160 | } | |
161 | ||
303ee601 | 162 | bool unit_has_name(const Unit *u, const char *name) { |
f278026d LP |
163 | assert(u); |
164 | assert(name); | |
165 | ||
4562c355 ZJS |
166 | return streq_ptr(name, u->id) || |
167 | set_contains(u->aliases, name); | |
f278026d LP |
168 | } |
169 | ||
598459ce LP |
170 | static void unit_init(Unit *u) { |
171 | CGroupContext *cc; | |
172 | ExecContext *ec; | |
173 | KillContext *kc; | |
174 | ||
175 | assert(u); | |
176 | assert(u->manager); | |
177 | assert(u->type >= 0); | |
178 | ||
179 | cc = unit_get_cgroup_context(u); | |
180 | if (cc) { | |
181 | cgroup_context_init(cc); | |
182 | ||
183 | /* Copy in the manager defaults into the cgroup | |
184 | * context, _before_ the rest of the settings have | |
185 | * been initialized */ | |
186 | ||
c9e120e0 LP |
187 | cc->cpu_accounting = u->manager->defaults.cpu_accounting; |
188 | cc->io_accounting = u->manager->defaults.io_accounting; | |
189 | cc->blockio_accounting = u->manager->defaults.blockio_accounting; | |
190 | cc->memory_accounting = u->manager->defaults.memory_accounting; | |
191 | cc->tasks_accounting = u->manager->defaults.tasks_accounting; | |
192 | cc->ip_accounting = u->manager->defaults.ip_accounting; | |
0af20ea2 LP |
193 | |
194 | if (u->type != UNIT_SLICE) | |
c9e120e0 | 195 | cc->tasks_max = u->manager->defaults.tasks_max; |
6bb00842 | 196 | |
c9e120e0 LP |
197 | cc->memory_pressure_watch = u->manager->defaults.memory_pressure_watch; |
198 | cc->memory_pressure_threshold_usec = u->manager->defaults.memory_pressure_threshold_usec; | |
598459ce LP |
199 | } |
200 | ||
201 | ec = unit_get_exec_context(u); | |
b1edf445 | 202 | if (ec) { |
598459ce LP |
203 | exec_context_init(ec); |
204 | ||
c9e120e0 LP |
205 | if (u->manager->defaults.oom_score_adjust_set) { |
206 | ec->oom_score_adjust = u->manager->defaults.oom_score_adjust; | |
d4a402e4 LP |
207 | ec->oom_score_adjust_set = true; |
208 | } | |
209 | ||
5e37d193 FB |
210 | if (MANAGER_IS_SYSTEM(u->manager)) |
211 | ec->keyring_mode = EXEC_KEYRING_SHARED; | |
212 | else { | |
213 | ec->keyring_mode = EXEC_KEYRING_INHERIT; | |
214 | ||
215 | /* User manager might have its umask redefined by PAM or UMask=. In this | |
216 | * case let the units it manages inherit this value by default. They can | |
217 | * still tune this value through their own unit file */ | |
41beeb3e | 218 | (void) get_process_umask(0, &ec->umask); |
5e37d193 | 219 | } |
b1edf445 LP |
220 | } |
221 | ||
598459ce LP |
222 | kc = unit_get_kill_context(u); |
223 | if (kc) | |
224 | kill_context_init(kc); | |
225 | ||
226 | if (UNIT_VTABLE(u)->init) | |
227 | UNIT_VTABLE(u)->init(u); | |
228 | } | |
229 | ||
4562c355 ZJS |
230 | static int unit_add_alias(Unit *u, char *donated_name) { |
231 | int r; | |
232 | ||
233 | /* Make sure that u->names is allocated. We may leave u->names | |
234 | * empty if we fail later, but this is not a problem. */ | |
973bc32a | 235 | r = set_ensure_put(&u->aliases, &string_hash_ops, donated_name); |
4562c355 ZJS |
236 | if (r < 0) |
237 | return r; | |
238 | assert(r > 0); | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
87f0e418 | 243 | int unit_add_name(Unit *u, const char *text) { |
4562c355 | 244 | _cleanup_free_ char *name = NULL, *instance = NULL; |
87f0e418 | 245 | UnitType t; |
87f0e418 LP |
246 | int r; |
247 | ||
248 | assert(u); | |
249 | assert(text); | |
250 | ||
7410616c | 251 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 252 | if (!u->instance) |
acd1987a WY |
253 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
254 | "instance is not set when adding name '%s': %m", text); | |
87f0e418 | 255 | |
4562c355 | 256 | r = unit_name_replace_instance(text, u->instance, &name); |
7410616c | 257 | if (r < 0) |
acd1987a WY |
258 | return log_unit_debug_errno(u, r, |
259 | "failed to build instance name from '%s': %m", text); | |
7410616c | 260 | } else { |
4562c355 ZJS |
261 | name = strdup(text); |
262 | if (!name) | |
7410616c LP |
263 | return -ENOMEM; |
264 | } | |
87f0e418 | 265 | |
4562c355 | 266 | if (unit_has_name(u, name)) |
7410616c | 267 | return 0; |
4562c355 ZJS |
268 | |
269 | if (hashmap_contains(u->manager->units, name)) | |
acd1987a | 270 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EEXIST), |
4562c355 | 271 | "unit already exist when adding name '%s': %m", name); |
7410616c | 272 | |
4562c355 | 273 | if (!unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) |
acd1987a | 274 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
4562c355 | 275 | "name '%s' is invalid: %m", name); |
e537352b | 276 | |
4562c355 | 277 | t = unit_name_to_type(name); |
7410616c | 278 | if (t < 0) |
acd1987a | 279 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
cd990847 | 280 | "failed to derive unit type from name '%s': %m", name); |
87f0e418 | 281 | |
598459ce | 282 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
acd1987a WY |
283 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
284 | "unit type is illegal: u->type(%d) and t(%d) for name '%s': %m", | |
4562c355 | 285 | u->type, t, name); |
87f0e418 | 286 | |
4562c355 | 287 | r = unit_name_to_instance(name, &instance); |
e48614c4 | 288 | if (r < 0) |
4562c355 | 289 | return log_unit_debug_errno(u, r, "failed to extract instance from name '%s': %m", name); |
87f0e418 | 290 | |
4562c355 ZJS |
291 | if (instance && !unit_type_may_template(t)) |
292 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), "templates are not allowed for name '%s': %m", name); | |
9e2f7c11 | 293 | |
d383acad ZJS |
294 | /* Ensure that this unit either has no instance, or that the instance matches. */ |
295 | if (u->type != _UNIT_TYPE_INVALID && !streq_ptr(u->instance, instance)) | |
acd1987a | 296 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
ada4b34e ZJS |
297 | "cannot add name %s, the instances don't match (\"%s\" != \"%s\").", |
298 | name, instance, u->instance); | |
9e2f7c11 | 299 | |
4562c355 | 300 | if (u->id && !unit_type_may_alias(t)) |
ada4b34e ZJS |
301 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EEXIST), |
302 | "cannot add name %s, aliases are not allowed for %s units.", | |
303 | name, unit_type_to_string(t)); | |
9e2f7c11 | 304 | |
598459ce | 305 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
ada4b34e | 306 | return log_unit_warning_errno(u, SYNTHETIC_ERRNO(E2BIG), "cannot add name, manager has too many units: %m"); |
4f0f902f | 307 | |
4562c355 ZJS |
308 | /* Add name to the global hashmap first, because that's easier to undo */ |
309 | r = hashmap_put(u->manager->units, name, u); | |
7410616c | 310 | if (r < 0) |
acd1987a | 311 | return log_unit_debug_errno(u, r, "add unit to hashmap failed for name '%s': %m", text); |
87f0e418 | 312 | |
4562c355 ZJS |
313 | if (u->id) { |
314 | r = unit_add_alias(u, name); /* unit_add_alias() takes ownership of the name on success */ | |
315 | if (r < 0) { | |
316 | hashmap_remove(u->manager->units, name); | |
317 | return r; | |
318 | } | |
319 | TAKE_PTR(name); | |
320 | ||
321 | } else { | |
322 | /* A new name, we don't need the set yet. */ | |
323 | assert(u->type == _UNIT_TYPE_INVALID); | |
324 | assert(!u->instance); | |
325 | ||
ac155bb8 | 326 | u->type = t; |
4562c355 ZJS |
327 | u->id = TAKE_PTR(name); |
328 | u->instance = TAKE_PTR(instance); | |
9e2f7c11 | 329 | |
71fda00f | 330 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
598459ce | 331 | unit_init(u); |
598459ce | 332 | } |
9e2f7c11 | 333 | |
598459ce LP |
334 | unit_add_to_dbus_queue(u); |
335 | return 0; | |
87f0e418 LP |
336 | } |
337 | ||
0ae97ec1 | 338 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 339 | _cleanup_free_ char *t = NULL; |
4562c355 | 340 | char *s; |
276c3e78 | 341 | int r; |
0ae97ec1 LP |
342 | |
343 | assert(u); | |
344 | assert(name); | |
345 | ||
7410616c | 346 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 347 | if (!u->instance) |
9e2f7c11 LP |
348 | return -EINVAL; |
349 | ||
7410616c LP |
350 | r = unit_name_replace_instance(name, u->instance, &t); |
351 | if (r < 0) | |
352 | return r; | |
9e2f7c11 LP |
353 | |
354 | name = t; | |
355 | } | |
356 | ||
4562c355 ZJS |
357 | if (streq_ptr(u->id, name)) |
358 | return 0; /* Nothing to do. */ | |
359 | ||
360 | /* Selects one of the aliases of this unit as the id */ | |
361 | s = set_get(u->aliases, (char*) name); | |
9e2f7c11 | 362 | if (!s) |
0ae97ec1 LP |
363 | return -ENOENT; |
364 | ||
4562c355 ZJS |
365 | if (u->id) { |
366 | r = set_remove_and_put(u->aliases, name, u->id); | |
367 | if (r < 0) | |
368 | return r; | |
369 | } else | |
370 | assert_se(set_remove(u->aliases, name)); /* see set_get() above… */ | |
276c3e78 | 371 | |
4562c355 | 372 | u->id = s; /* Old u->id is now stored in the set, and s is not stored anywhere */ |
c1e1601e | 373 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 374 | |
0ae97ec1 LP |
375 | return 0; |
376 | } | |
377 | ||
f50e0a01 | 378 | int unit_set_description(Unit *u, const char *description) { |
84b26d51 | 379 | int r; |
f50e0a01 LP |
380 | |
381 | assert(u); | |
382 | ||
84b26d51 LP |
383 | r = free_and_strdup(&u->description, empty_to_null(description)); |
384 | if (r < 0) | |
385 | return r; | |
386 | if (r > 0) | |
387 | unit_add_to_dbus_queue(u); | |
c1e1601e | 388 | |
f50e0a01 LP |
389 | return 0; |
390 | } | |
391 | ||
02de9614 ZJS |
392 | static bool unit_success_failure_handler_has_jobs(Unit *unit) { |
393 | Unit *other; | |
394 | ||
395 | UNIT_FOREACH_DEPENDENCY(other, unit, UNIT_ATOM_ON_SUCCESS) | |
396 | if (other->job || other->nop_job) | |
397 | return true; | |
398 | ||
399 | UNIT_FOREACH_DEPENDENCY(other, unit, UNIT_ATOM_ON_FAILURE) | |
400 | if (other->job || other->nop_job) | |
401 | return true; | |
402 | ||
403 | return false; | |
404 | } | |
405 | ||
6ac62d61 LP |
406 | void unit_release_resources(Unit *u) { |
407 | UnitActiveState state; | |
1ba84fef | 408 | ExecContext *ec; |
6ac62d61 LP |
409 | |
410 | assert(u); | |
411 | ||
412 | if (u->job || u->nop_job) | |
413 | return; | |
414 | ||
415 | if (u->perpetual) | |
416 | return; | |
417 | ||
418 | state = unit_active_state(u); | |
419 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
420 | return; | |
421 | ||
422 | if (unit_will_restart(u)) | |
423 | return; | |
424 | ||
1ba84fef LP |
425 | ec = unit_get_exec_context(u); |
426 | if (ec && ec->runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART) | |
427 | exec_context_destroy_runtime_directory(ec, u->manager->prefix[EXEC_DIRECTORY_RUNTIME]); | |
428 | ||
6ac62d61 LP |
429 | if (UNIT_VTABLE(u)->release_resources) |
430 | UNIT_VTABLE(u)->release_resources(u); | |
431 | } | |
432 | ||
f2f725e5 | 433 | bool unit_may_gc(Unit *u) { |
a354329f | 434 | UnitActiveState state; |
e98b2fbb | 435 | int r; |
5afe510c | 436 | |
701cc384 LP |
437 | assert(u); |
438 | ||
6ac62d61 LP |
439 | /* Checks whether the unit is ready to be unloaded for garbage collection. Returns true when the |
440 | * unit may be collected, and false if there's some reason to keep it loaded. | |
2641f02e | 441 | * |
6ac62d61 LP |
442 | * References from other units are *not* checked here. Instead, this is done in unit_gc_sweep(), but |
443 | * using markers to properly collect dependency loops. | |
2641f02e | 444 | */ |
5afe510c | 445 | |
02de9614 | 446 | if (u->job || u->nop_job) |
f2f725e5 | 447 | return false; |
6c073082 | 448 | |
f5869324 | 449 | if (u->perpetual) |
f2f725e5 | 450 | return false; |
9d576438 | 451 | |
935f8042 LP |
452 | /* if we saw a cgroup empty event for this unit, stay around until we processed it so that we remove |
453 | * the empty cgroup if possible. Similar, process any pending OOM events if they are already queued | |
454 | * before we release the unit. */ | |
455 | if (u->in_cgroup_empty_queue || u->in_cgroup_oom_queue) | |
8db99898 RP |
456 | return false; |
457 | ||
af05bb97 LP |
458 | /* Make sure to send out D-Bus events before we unload the unit */ |
459 | if (u->in_dbus_queue) | |
460 | return false; | |
461 | ||
05a98afd | 462 | if (sd_bus_track_count(u->bus_track) > 0) |
f2f725e5 | 463 | return false; |
05a98afd | 464 | |
6ac62d61 LP |
465 | state = unit_active_state(u); |
466 | ||
467 | /* But we keep the unit object around for longer when it is referenced or configured to not be | |
468 | * gc'ed */ | |
5afe510c LP |
469 | switch (u->collect_mode) { |
470 | ||
471 | case COLLECT_INACTIVE: | |
472 | if (state != UNIT_INACTIVE) | |
f2f725e5 | 473 | return false; |
5afe510c LP |
474 | |
475 | break; | |
476 | ||
477 | case COLLECT_INACTIVE_OR_FAILED: | |
478 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
f2f725e5 | 479 | return false; |
5afe510c LP |
480 | |
481 | break; | |
482 | ||
483 | default: | |
04499a70 | 484 | assert_not_reached(); |
5afe510c LP |
485 | } |
486 | ||
02de9614 ZJS |
487 | /* Check if any OnFailure= or on Success= jobs may be pending */ |
488 | if (unit_success_failure_handler_has_jobs(u)) | |
489 | return false; | |
490 | ||
e98b2fbb LP |
491 | if (u->cgroup_path) { |
492 | /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay | |
493 | * around. Units with active processes should never be collected. */ | |
494 | ||
495 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
496 | if (r < 0) | |
6178e2f8 | 497 | log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", empty_to_root(u->cgroup_path)); |
e98b2fbb | 498 | if (r <= 0) |
f2f725e5 | 499 | return false; |
e98b2fbb LP |
500 | } |
501 | ||
6ac62d61 LP |
502 | if (!UNIT_VTABLE(u)->may_gc) |
503 | return true; | |
701cc384 | 504 | |
6ac62d61 | 505 | return UNIT_VTABLE(u)->may_gc(u); |
701cc384 LP |
506 | } |
507 | ||
87f0e418 LP |
508 | void unit_add_to_load_queue(Unit *u) { |
509 | assert(u); | |
ac155bb8 | 510 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 511 | |
ac155bb8 | 512 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
513 | return; |
514 | ||
71fda00f | 515 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 516 | u->in_load_queue = true; |
87f0e418 LP |
517 | } |
518 | ||
23a177ef LP |
519 | void unit_add_to_cleanup_queue(Unit *u) { |
520 | assert(u); | |
521 | ||
ac155bb8 | 522 | if (u->in_cleanup_queue) |
23a177ef LP |
523 | return; |
524 | ||
71fda00f | 525 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 526 | u->in_cleanup_queue = true; |
23a177ef LP |
527 | } |
528 | ||
701cc384 LP |
529 | void unit_add_to_gc_queue(Unit *u) { |
530 | assert(u); | |
531 | ||
ac155bb8 | 532 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
533 | return; |
534 | ||
f2f725e5 | 535 | if (!unit_may_gc(u)) |
701cc384 LP |
536 | return; |
537 | ||
c5a97ed1 | 538 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 539 | u->in_gc_queue = true; |
701cc384 LP |
540 | } |
541 | ||
c1e1601e LP |
542 | void unit_add_to_dbus_queue(Unit *u) { |
543 | assert(u); | |
ac155bb8 | 544 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 545 | |
ac155bb8 | 546 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
547 | return; |
548 | ||
a567261a | 549 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 550 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 551 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 552 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 553 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
554 | return; |
555 | } | |
556 | ||
71fda00f | 557 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 558 | u->in_dbus_queue = true; |
c1e1601e LP |
559 | } |
560 | ||
fda09318 | 561 | void unit_submit_to_stop_when_unneeded_queue(Unit *u) { |
a3c1168a LP |
562 | assert(u); |
563 | ||
564 | if (u->in_stop_when_unneeded_queue) | |
565 | return; | |
566 | ||
567 | if (!u->stop_when_unneeded) | |
568 | return; | |
569 | ||
570 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
571 | return; | |
572 | ||
573 | LIST_PREPEND(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
574 | u->in_stop_when_unneeded_queue = true; | |
575 | } | |
576 | ||
0bc488c9 LP |
577 | void unit_submit_to_start_when_upheld_queue(Unit *u) { |
578 | assert(u); | |
579 | ||
580 | if (u->in_start_when_upheld_queue) | |
581 | return; | |
582 | ||
583 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u))) | |
584 | return; | |
585 | ||
586 | if (!unit_has_dependency(u, UNIT_ATOM_START_STEADILY, NULL)) | |
587 | return; | |
588 | ||
589 | LIST_PREPEND(start_when_upheld_queue, u->manager->start_when_upheld_queue, u); | |
590 | u->in_start_when_upheld_queue = true; | |
591 | } | |
592 | ||
56c59592 LP |
593 | void unit_submit_to_stop_when_bound_queue(Unit *u) { |
594 | assert(u); | |
595 | ||
596 | if (u->in_stop_when_bound_queue) | |
597 | return; | |
598 | ||
599 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
600 | return; | |
601 | ||
602 | if (!unit_has_dependency(u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT, NULL)) | |
603 | return; | |
604 | ||
605 | LIST_PREPEND(stop_when_bound_queue, u->manager->stop_when_bound_queue, u); | |
606 | u->in_stop_when_bound_queue = true; | |
607 | } | |
608 | ||
1ba84fef LP |
609 | static bool unit_can_release_resources(Unit *u) { |
610 | ExecContext *ec; | |
611 | ||
612 | assert(u); | |
613 | ||
614 | if (UNIT_VTABLE(u)->release_resources) | |
615 | return true; | |
616 | ||
617 | ec = unit_get_exec_context(u); | |
618 | if (ec && ec->runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART) | |
619 | return true; | |
620 | ||
621 | return false; | |
622 | } | |
623 | ||
6ac62d61 LP |
624 | void unit_submit_to_release_resources_queue(Unit *u) { |
625 | assert(u); | |
626 | ||
627 | if (u->in_release_resources_queue) | |
628 | return; | |
629 | ||
630 | if (u->job || u->nop_job) | |
631 | return; | |
632 | ||
633 | if (u->perpetual) | |
634 | return; | |
635 | ||
1ba84fef | 636 | if (!unit_can_release_resources(u)) |
6ac62d61 LP |
637 | return; |
638 | ||
639 | LIST_PREPEND(release_resources_queue, u->manager->release_resources_queue, u); | |
640 | u->in_release_resources_queue = true; | |
641 | } | |
642 | ||
15ed3c3a | 643 | static void unit_clear_dependencies(Unit *u) { |
87f0e418 LP |
644 | assert(u); |
645 | ||
15ed3c3a LP |
646 | /* Removes all dependencies configured on u and their reverse dependencies. */ |
647 | ||
648 | for (Hashmap *deps; (deps = hashmap_steal_first(u->dependencies));) { | |
87f0e418 | 649 | |
15ed3c3a LP |
650 | for (Unit *other; (other = hashmap_steal_first_key(deps));) { |
651 | Hashmap *other_deps; | |
701cc384 | 652 | |
15ed3c3a LP |
653 | HASHMAP_FOREACH(other_deps, other->dependencies) |
654 | hashmap_remove(other_deps, u); | |
655 | ||
656 | unit_add_to_gc_queue(other); | |
657 | } | |
658 | ||
659 | hashmap_free(deps); | |
87f0e418 LP |
660 | } |
661 | ||
15ed3c3a | 662 | u->dependencies = hashmap_free(u->dependencies); |
87f0e418 LP |
663 | } |
664 | ||
c2756a68 | 665 | static void unit_remove_transient(Unit *u) { |
c2756a68 LP |
666 | assert(u); |
667 | ||
668 | if (!u->transient) | |
669 | return; | |
670 | ||
671 | if (u->fragment_path) | |
3f5e8115 | 672 | (void) unlink(u->fragment_path); |
c2756a68 LP |
673 | |
674 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 675 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 676 | |
45519d13 | 677 | if (path_extract_directory(*i, &p) < 0) /* Get the drop-in directory from the drop-in file */ |
39591351 LP |
678 | continue; |
679 | ||
45519d13 | 680 | if (path_extract_directory(p, &pp) < 0) /* Get the config directory from the drop-in directory */ |
39591351 LP |
681 | continue; |
682 | ||
683 | /* Only drop transient drop-ins */ | |
684 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
685 | continue; | |
c2756a68 | 686 | |
39591351 LP |
687 | (void) unlink(*i); |
688 | (void) rmdir(p); | |
c2756a68 LP |
689 | } |
690 | } | |
691 | ||
a57f7e2c | 692 | static void unit_free_requires_mounts_for(Unit *u) { |
eef85c4a | 693 | assert(u); |
a57f7e2c | 694 | |
eef85c4a | 695 | for (;;) { |
c2b2df60 | 696 | _cleanup_free_ char *path = NULL; |
a57f7e2c | 697 | |
eef85c4a LP |
698 | path = hashmap_steal_first_key(u->requires_mounts_for); |
699 | if (!path) | |
700 | break; | |
701 | else { | |
702 | char s[strlen(path) + 1]; | |
a57f7e2c | 703 | |
eef85c4a LP |
704 | PATH_FOREACH_PREFIX_MORE(s, path) { |
705 | char *y; | |
706 | Set *x; | |
707 | ||
708 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
709 | if (!x) | |
710 | continue; | |
a57f7e2c | 711 | |
eef85c4a | 712 | (void) set_remove(x, u); |
a57f7e2c | 713 | |
eef85c4a LP |
714 | if (set_isempty(x)) { |
715 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
716 | free(y); | |
717 | set_free(x); | |
718 | } | |
a57f7e2c LP |
719 | } |
720 | } | |
721 | } | |
722 | ||
eef85c4a | 723 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
a57f7e2c LP |
724 | } |
725 | ||
598459ce LP |
726 | static void unit_done(Unit *u) { |
727 | ExecContext *ec; | |
728 | CGroupContext *cc; | |
729 | ||
730 | assert(u); | |
731 | ||
732 | if (u->type < 0) | |
733 | return; | |
734 | ||
735 | if (UNIT_VTABLE(u)->done) | |
736 | UNIT_VTABLE(u)->done(u); | |
737 | ||
738 | ec = unit_get_exec_context(u); | |
739 | if (ec) | |
740 | exec_context_done(ec); | |
741 | ||
742 | cc = unit_get_cgroup_context(u); | |
743 | if (cc) | |
744 | cgroup_context_done(cc); | |
745 | } | |
746 | ||
75db809a | 747 | Unit* unit_free(Unit *u) { |
12f64221 | 748 | Unit *slice; |
87f0e418 LP |
749 | char *t; |
750 | ||
c9d5c9c0 | 751 | if (!u) |
75db809a | 752 | return NULL; |
87f0e418 | 753 | |
7223d500 LB |
754 | sd_event_source_disable_unref(u->auto_start_stop_event_source); |
755 | ||
50fb00b7 | 756 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 757 | |
2c289ea8 | 758 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
759 | unit_remove_transient(u); |
760 | ||
c1e1601e LP |
761 | bus_unit_send_removed_signal(u); |
762 | ||
598459ce | 763 | unit_done(u); |
a013b84b | 764 | |
50be4f4a | 765 | unit_dequeue_rewatch_pids(u); |
cf9fd508 | 766 | |
73458283 YW |
767 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
768 | u->bus_track = sd_bus_track_unref(u->bus_track); | |
05a98afd | 769 | u->deserialized_refs = strv_free(u->deserialized_refs); |
af1e3365 | 770 | u->pending_freezer_invocation = sd_bus_message_unref(u->pending_freezer_invocation); |
05a98afd | 771 | |
a57f7e2c LP |
772 | unit_free_requires_mounts_for(u); |
773 | ||
90e74a66 | 774 | SET_FOREACH(t, u->aliases) |
ac155bb8 | 775 | hashmap_remove_value(u->manager->units, t, u); |
4562c355 ZJS |
776 | if (u->id) |
777 | hashmap_remove_value(u->manager->units, u->id, u); | |
87f0e418 | 778 | |
4b58153d LP |
779 | if (!sd_id128_is_null(u->invocation_id)) |
780 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
781 | ||
97e7d748 MS |
782 | if (u->job) { |
783 | Job *j = u->job; | |
784 | job_uninstall(j); | |
785 | job_free(j); | |
786 | } | |
964e0949 | 787 | |
e0209d83 MS |
788 | if (u->nop_job) { |
789 | Job *j = u->nop_job; | |
790 | job_uninstall(j); | |
791 | job_free(j); | |
792 | } | |
793 | ||
4c591f39 MK |
794 | /* A unit is being dropped from the tree, make sure our family is realized properly. Do this after we |
795 | * detach the unit from slice tree in order to eliminate its effect on controller masks. */ | |
12f64221 | 796 | slice = UNIT_GET_SLICE(u); |
d219a2b0 | 797 | unit_clear_dependencies(u); |
12f64221 LP |
798 | if (slice) |
799 | unit_add_family_to_cgroup_realize_queue(slice); | |
fb46fca7 | 800 | |
adefcf28 LP |
801 | if (u->on_console) |
802 | manager_unref_console(u->manager); | |
803 | ||
3d027d4d | 804 | fdset_free(u->initial_socket_bind_link_fds); |
91ce91c7 JK |
805 | #if BPF_FRAMEWORK |
806 | bpf_link_free(u->ipv4_socket_bind_link); | |
807 | bpf_link_free(u->ipv6_socket_bind_link); | |
808 | #endif | |
809 | ||
efdb0237 | 810 | unit_release_cgroup(u); |
72673e86 | 811 | |
d3070fbd LP |
812 | if (!MANAGER_IS_RELOADING(u->manager)) |
813 | unit_unlink_state_files(u); | |
814 | ||
00d9ef85 LP |
815 | unit_unref_uid_gid(u, false); |
816 | ||
5269eb6b | 817 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 818 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 819 | |
a911bb9a LP |
820 | unit_unwatch_all_pids(u); |
821 | ||
7f7d01ed ZJS |
822 | while (u->refs_by_target) |
823 | unit_ref_unset(u->refs_by_target); | |
57020a3a | 824 | |
ac155bb8 | 825 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 826 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 827 | |
ac155bb8 | 828 | if (u->in_load_queue) |
71fda00f | 829 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 830 | |
ac155bb8 | 831 | if (u->in_dbus_queue) |
71fda00f | 832 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 833 | |
13e72103 MK |
834 | if (u->in_cleanup_queue) |
835 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
836 | ||
a2d72e26 | 837 | if (u->in_gc_queue) |
c5a97ed1 | 838 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 839 | |
91a6073e LP |
840 | if (u->in_cgroup_realize_queue) |
841 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 842 | |
09e24654 LP |
843 | if (u->in_cgroup_empty_queue) |
844 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
845 | ||
13e72103 MK |
846 | if (u->in_cgroup_oom_queue) |
847 | LIST_REMOVE(cgroup_oom_queue, u->manager->cgroup_oom_queue, u); | |
adefcf28 | 848 | |
19496554 MS |
849 | if (u->in_target_deps_queue) |
850 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
851 | ||
a3c1168a LP |
852 | if (u->in_stop_when_unneeded_queue) |
853 | LIST_REMOVE(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
854 | ||
0bc488c9 LP |
855 | if (u->in_start_when_upheld_queue) |
856 | LIST_REMOVE(start_when_upheld_queue, u->manager->start_when_upheld_queue, u); | |
857 | ||
56c59592 LP |
858 | if (u->in_stop_when_bound_queue) |
859 | LIST_REMOVE(stop_when_bound_queue, u->manager->stop_when_bound_queue, u); | |
860 | ||
6ac62d61 LP |
861 | if (u->in_release_resources_queue) |
862 | LIST_REMOVE(release_resources_queue, u->manager->release_resources_queue, u); | |
863 | ||
0fd9c28c | 864 | bpf_firewall_close(u); |
fab34748 | 865 | |
5f8ba20d JK |
866 | hashmap_free(u->bpf_foreign_by_key); |
867 | ||
76dc1725 | 868 | bpf_program_free(u->bpf_device_control_installed); |
084c7007 | 869 | |
6f50d4f7 MV |
870 | #if BPF_FRAMEWORK |
871 | bpf_link_free(u->restrict_ifaces_ingress_bpf_link); | |
872 | bpf_link_free(u->restrict_ifaces_egress_bpf_link); | |
873 | #endif | |
874 | fdset_free(u->initial_restric_ifaces_link_fds); | |
875 | ||
a946fa9b ZJS |
876 | condition_free_list(u->conditions); |
877 | condition_free_list(u->asserts); | |
f755e3b7 | 878 | |
ac155bb8 | 879 | free(u->description); |
49dbfa7b | 880 | strv_free(u->documentation); |
ac155bb8 | 881 | free(u->fragment_path); |
1b64d026 | 882 | free(u->source_path); |
ae7a7182 | 883 | strv_free(u->dropin_paths); |
ac155bb8 | 884 | free(u->instance); |
87f0e418 | 885 | |
f189ab18 | 886 | free(u->job_timeout_reboot_arg); |
6bf0f408 LP |
887 | free(u->reboot_arg); |
888 | ||
23e9a7dd LP |
889 | free(u->access_selinux_context); |
890 | ||
4562c355 ZJS |
891 | set_free_free(u->aliases); |
892 | free(u->id); | |
893 | ||
48b92b37 LB |
894 | activation_details_unref(u->activation_details); |
895 | ||
75db809a | 896 | return mfree(u); |
87f0e418 LP |
897 | } |
898 | ||
d9e45bc3 MS |
899 | FreezerState unit_freezer_state(Unit *u) { |
900 | assert(u); | |
901 | ||
902 | return u->freezer_state; | |
903 | } | |
904 | ||
905 | int unit_freezer_state_kernel(Unit *u, FreezerState *ret) { | |
906 | char *values[1] = {}; | |
907 | int r; | |
908 | ||
909 | assert(u); | |
910 | ||
911 | r = cg_get_keyed_attribute(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "cgroup.events", | |
912 | STRV_MAKE("frozen"), values); | |
913 | if (r < 0) | |
914 | return r; | |
915 | ||
916 | r = _FREEZER_STATE_INVALID; | |
917 | ||
918 | if (values[0]) { | |
919 | if (streq(values[0], "0")) | |
920 | r = FREEZER_RUNNING; | |
921 | else if (streq(values[0], "1")) | |
922 | r = FREEZER_FROZEN; | |
923 | } | |
924 | ||
925 | free(values[0]); | |
926 | *ret = r; | |
927 | ||
928 | return 0; | |
929 | } | |
930 | ||
87f0e418 LP |
931 | UnitActiveState unit_active_state(Unit *u) { |
932 | assert(u); | |
933 | ||
ac155bb8 | 934 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
935 | return unit_active_state(unit_follow_merge(u)); |
936 | ||
937 | /* After a reload it might happen that a unit is not correctly | |
938 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 939 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
940 | |
941 | return UNIT_VTABLE(u)->active_state(u); | |
942 | } | |
943 | ||
10a94420 LP |
944 | const char* unit_sub_state_to_string(Unit *u) { |
945 | assert(u); | |
946 | ||
947 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
948 | } | |
949 | ||
15ed3c3a | 950 | static int unit_merge_names(Unit *u, Unit *other) { |
4562c355 | 951 | char *name; |
7c0b05e5 | 952 | int r; |
87f0e418 | 953 | |
23a177ef LP |
954 | assert(u); |
955 | assert(other); | |
956 | ||
4562c355 | 957 | r = unit_add_alias(u, other->id); |
7c0b05e5 MS |
958 | if (r < 0) |
959 | return r; | |
23a177ef | 960 | |
4562c355 ZJS |
961 | r = set_move(u->aliases, other->aliases); |
962 | if (r < 0) { | |
963 | set_remove(u->aliases, other->id); | |
964 | return r; | |
965 | } | |
23a177ef | 966 | |
4562c355 ZJS |
967 | TAKE_PTR(other->id); |
968 | other->aliases = set_free_free(other->aliases); | |
23a177ef | 969 | |
90e74a66 | 970 | SET_FOREACH(name, u->aliases) |
4562c355 | 971 | assert_se(hashmap_replace(u->manager->units, name, u) == 0); |
7c0b05e5 MS |
972 | |
973 | return 0; | |
87f0e418 LP |
974 | } |
975 | ||
15ed3c3a LP |
976 | static int unit_reserve_dependencies(Unit *u, Unit *other) { |
977 | size_t n_reserve; | |
978 | Hashmap* deps; | |
979 | void *d; | |
980 | int r; | |
09a65f92 MS |
981 | |
982 | assert(u); | |
983 | assert(other); | |
09a65f92 | 984 | |
15ed3c3a LP |
985 | /* Let's reserve some space in the dependency hashmaps so that later on merging the units cannot |
986 | * fail. | |
987 | * | |
18fe76eb | 988 | * First make some room in the per dependency type hashmaps. Using the summed size of both units' |
15ed3c3a LP |
989 | * hashmaps is an estimate that is likely too high since they probably use some of the same |
990 | * types. But it's never too low, and that's all we need. */ | |
991 | ||
992 | n_reserve = MIN(hashmap_size(other->dependencies), LESS_BY((size_t) _UNIT_DEPENDENCY_MAX, hashmap_size(u->dependencies))); | |
993 | if (n_reserve > 0) { | |
994 | r = hashmap_ensure_allocated(&u->dependencies, NULL); | |
995 | if (r < 0) | |
996 | return r; | |
997 | ||
998 | r = hashmap_reserve(u->dependencies, n_reserve); | |
999 | if (r < 0) | |
1000 | return r; | |
1001 | } | |
1002 | ||
1003 | /* Now, enlarge our per dependency type hashmaps by the number of entries in the same hashmap of the | |
1004 | * other unit's dependencies. | |
1005 | * | |
1006 | * NB: If u does not have a dependency set allocated for some dependency type, there is no need to | |
1007 | * reserve anything for. In that case other's set will be transferred as a whole to u by | |
1008 | * complete_move(). */ | |
1009 | ||
1010 | HASHMAP_FOREACH_KEY(deps, d, u->dependencies) { | |
1011 | Hashmap *other_deps; | |
1012 | ||
1013 | other_deps = hashmap_get(other->dependencies, d); | |
1014 | ||
1015 | r = hashmap_reserve(deps, hashmap_size(other_deps)); | |
1016 | if (r < 0) | |
1017 | return r; | |
1018 | } | |
1019 | ||
1020 | return 0; | |
1021 | } | |
1022 | ||
ed991163 | 1023 | static bool unit_should_warn_about_dependency(UnitDependency dependency) { |
15ed3c3a | 1024 | /* Only warn about some unit types */ |
ed991163 YW |
1025 | return IN_SET(dependency, |
1026 | UNIT_CONFLICTS, | |
1027 | UNIT_CONFLICTED_BY, | |
1028 | UNIT_BEFORE, | |
1029 | UNIT_AFTER, | |
1030 | UNIT_ON_SUCCESS, | |
1031 | UNIT_ON_FAILURE, | |
1032 | UNIT_TRIGGERS, | |
1033 | UNIT_TRIGGERED_BY); | |
15ed3c3a LP |
1034 | } |
1035 | ||
1036 | static int unit_per_dependency_type_hashmap_update( | |
1037 | Hashmap *per_type, | |
1038 | Unit *other, | |
1039 | UnitDependencyMask origin_mask, | |
1040 | UnitDependencyMask destination_mask) { | |
1041 | ||
1042 | UnitDependencyInfo info; | |
1043 | int r; | |
1044 | ||
1045 | assert(other); | |
1046 | assert_cc(sizeof(void*) == sizeof(info)); | |
1047 | ||
1048 | /* Acquire the UnitDependencyInfo entry for the Unit* we are interested in, and update it if it | |
1049 | * exists, or insert it anew if not. */ | |
09a65f92 | 1050 | |
15ed3c3a LP |
1051 | info.data = hashmap_get(per_type, other); |
1052 | if (info.data) { | |
1053 | /* Entry already exists. Add in our mask. */ | |
1054 | ||
1055 | if (FLAGS_SET(origin_mask, info.origin_mask) && | |
1056 | FLAGS_SET(destination_mask, info.destination_mask)) | |
1057 | return 0; /* NOP */ | |
1058 | ||
1059 | info.origin_mask |= origin_mask; | |
1060 | info.destination_mask |= destination_mask; | |
1061 | ||
1062 | r = hashmap_update(per_type, other, info.data); | |
1063 | } else { | |
1064 | info = (UnitDependencyInfo) { | |
1065 | .origin_mask = origin_mask, | |
1066 | .destination_mask = destination_mask, | |
1067 | }; | |
09a65f92 | 1068 | |
15ed3c3a LP |
1069 | r = hashmap_put(per_type, other, info.data); |
1070 | } | |
1071 | if (r < 0) | |
1072 | return r; | |
1073 | ||
15ed3c3a | 1074 | return 1; |
09a65f92 MS |
1075 | } |
1076 | ||
c8b3b524 YW |
1077 | static void unit_merge_dependencies(Unit *u, Unit *other) { |
1078 | Hashmap *deps; | |
1079 | void *dt; /* Actually of type UnitDependency, except that we don't bother casting it here, | |
1080 | * since the hashmaps all want it as void pointer. */ | |
eef85c4a | 1081 | |
23a177ef LP |
1082 | assert(u); |
1083 | assert(other); | |
23a177ef | 1084 | |
15ed3c3a LP |
1085 | if (u == other) |
1086 | return; | |
1087 | ||
c8b3b524 YW |
1088 | /* First, remove dependency to other. */ |
1089 | HASHMAP_FOREACH_KEY(deps, dt, u->dependencies) { | |
ed991163 YW |
1090 | if (hashmap_remove(deps, other) && unit_should_warn_about_dependency(UNIT_DEPENDENCY_FROM_PTR(dt))) |
1091 | log_unit_warning(u, "Dependency %s=%s is dropped, as %s is merged into %s.", | |
1092 | unit_dependency_to_string(UNIT_DEPENDENCY_FROM_PTR(dt)), | |
1093 | other->id, other->id, u->id); | |
c8b3b524 YW |
1094 | |
1095 | if (hashmap_isempty(deps)) | |
1096 | hashmap_free(hashmap_remove(u->dependencies, dt)); | |
1097 | } | |
1098 | ||
15ed3c3a | 1099 | for (;;) { |
5d2a48da | 1100 | _cleanup_hashmap_free_ Hashmap *other_deps = NULL; |
15ed3c3a LP |
1101 | UnitDependencyInfo di_back; |
1102 | Unit *back; | |
15ed3c3a LP |
1103 | |
1104 | /* Let's focus on one dependency type at a time, that 'other' has defined. */ | |
1105 | other_deps = hashmap_steal_first_key_and_value(other->dependencies, &dt); | |
1106 | if (!other_deps) | |
1107 | break; /* done! */ | |
1108 | ||
4b7918a6 YW |
1109 | deps = hashmap_get(u->dependencies, dt); |
1110 | ||
15ed3c3a LP |
1111 | /* Now iterate through all dependencies of this dependency type, of 'other'. We refer to the |
1112 | * referenced units as 'back'. */ | |
1113 | HASHMAP_FOREACH_KEY(di_back.data, back, other_deps) { | |
1114 | Hashmap *back_deps; | |
1115 | void *back_dt; | |
eef85c4a | 1116 | |
e66047ff | 1117 | if (back == u) { |
15ed3c3a LP |
1118 | /* This is a dependency pointing back to the unit we want to merge with? |
1119 | * Suppress it (but warn) */ | |
ed991163 YW |
1120 | if (unit_should_warn_about_dependency(UNIT_DEPENDENCY_FROM_PTR(dt))) |
1121 | log_unit_warning(u, "Dependency %s=%s in %s is dropped, as %s is merged into %s.", | |
1122 | unit_dependency_to_string(UNIT_DEPENDENCY_FROM_PTR(dt)), | |
1123 | u->id, other->id, other->id, u->id); | |
1124 | ||
4b7918a6 | 1125 | hashmap_remove(other_deps, back); |
15ed3c3a LP |
1126 | continue; |
1127 | } | |
eef85c4a | 1128 | |
15ed3c3a LP |
1129 | /* Now iterate through all deps of 'back', and fix the ones pointing to 'other' to |
1130 | * point to 'u' instead. */ | |
1131 | HASHMAP_FOREACH_KEY(back_deps, back_dt, back->dependencies) { | |
1132 | UnitDependencyInfo di_move; | |
eef85c4a | 1133 | |
15ed3c3a LP |
1134 | di_move.data = hashmap_remove(back_deps, other); |
1135 | if (!di_move.data) | |
1136 | continue; | |
eef85c4a | 1137 | |
15ed3c3a LP |
1138 | assert_se(unit_per_dependency_type_hashmap_update( |
1139 | back_deps, | |
1140 | u, | |
1141 | di_move.origin_mask, | |
1142 | di_move.destination_mask) >= 0); | |
1143 | } | |
eef85c4a | 1144 | |
15ed3c3a | 1145 | /* The target unit already has dependencies of this type, let's then merge this individually. */ |
4b7918a6 YW |
1146 | if (deps) |
1147 | assert_se(unit_per_dependency_type_hashmap_update( | |
1148 | deps, | |
1149 | back, | |
1150 | di_back.origin_mask, | |
1151 | di_back.destination_mask) >= 0); | |
15ed3c3a | 1152 | } |
4b7918a6 YW |
1153 | |
1154 | /* Now all references towards 'other' of the current type 'dt' are corrected to point to 'u'. | |
1155 | * Lets's now move the deps of type 'dt' from 'other' to 'u'. If the unit does not have | |
1156 | * dependencies of this type, let's move them per type wholesale. */ | |
1157 | if (!deps) | |
1158 | assert_se(hashmap_put(u->dependencies, dt, TAKE_PTR(other_deps)) >= 0); | |
15ed3c3a | 1159 | } |
23a177ef | 1160 | |
15ed3c3a | 1161 | other->dependencies = hashmap_free(other->dependencies); |
23a177ef LP |
1162 | } |
1163 | ||
1164 | int unit_merge(Unit *u, Unit *other) { | |
09a65f92 | 1165 | int r; |
87f0e418 LP |
1166 | |
1167 | assert(u); | |
1168 | assert(other); | |
ac155bb8 MS |
1169 | assert(u->manager == other->manager); |
1170 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 1171 | |
cc916967 LP |
1172 | other = unit_follow_merge(other); |
1173 | ||
23a177ef LP |
1174 | if (other == u) |
1175 | return 0; | |
1176 | ||
ac155bb8 | 1177 | if (u->type != other->type) |
9e2f7c11 LP |
1178 | return -EINVAL; |
1179 | ||
8a993b61 | 1180 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
1181 | return -EEXIST; |
1182 | ||
ec2ce0c5 | 1183 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 1184 | return -EEXIST; |
87f0e418 | 1185 | |
d383acad ZJS |
1186 | if (!streq_ptr(u->instance, other->instance)) |
1187 | return -EINVAL; | |
1188 | ||
ac155bb8 | 1189 | if (other->job) |
819e213f LP |
1190 | return -EEXIST; |
1191 | ||
e0209d83 MS |
1192 | if (other->nop_job) |
1193 | return -EEXIST; | |
1194 | ||
fdf20a31 | 1195 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
1196 | return -EEXIST; |
1197 | ||
15ed3c3a LP |
1198 | /* Make reservations to ensure merge_dependencies() won't fail. We don't rollback reservations if we |
1199 | * fail. We don't have a way to undo reservations. A reservation is not a leak. */ | |
1200 | r = unit_reserve_dependencies(u, other); | |
1201 | if (r < 0) | |
1202 | return r; | |
09a65f92 | 1203 | |
57020a3a | 1204 | /* Redirect all references */ |
7f7d01ed ZJS |
1205 | while (other->refs_by_target) |
1206 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
57020a3a | 1207 | |
87f0e418 | 1208 | /* Merge dependencies */ |
15ed3c3a | 1209 | unit_merge_dependencies(u, other); |
87f0e418 | 1210 | |
1d0c81a0 YW |
1211 | /* Merge names. It is better to do that after merging deps, otherwise the log message contains n/a. */ |
1212 | r = unit_merge_names(u, other); | |
1213 | if (r < 0) | |
1214 | return r; | |
1215 | ||
ac155bb8 MS |
1216 | other->load_state = UNIT_MERGED; |
1217 | other->merged_into = u; | |
23a177ef | 1218 | |
48b92b37 LB |
1219 | if (!u->activation_details) |
1220 | u->activation_details = activation_details_ref(other->activation_details); | |
1221 | ||
3616a49c LP |
1222 | /* If there is still some data attached to the other node, we |
1223 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 1224 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
1225 | if (UNIT_VTABLE(other)->done) |
1226 | UNIT_VTABLE(other)->done(other); | |
1227 | ||
1228 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
1229 | unit_add_to_cleanup_queue(other); |
1230 | ||
1231 | return 0; | |
1232 | } | |
1233 | ||
1234 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 1235 | _cleanup_free_ char *s = NULL; |
23a177ef | 1236 | Unit *other; |
9e2f7c11 | 1237 | int r; |
23a177ef | 1238 | |
e8630e69 ZJS |
1239 | /* Either add name to u, or if a unit with name already exists, merge it with u. |
1240 | * If name is a template, do the same for name@instance, where instance is u's instance. */ | |
1241 | ||
23a177ef LP |
1242 | assert(u); |
1243 | assert(name); | |
1244 | ||
7410616c | 1245 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 1246 | if (!u->instance) |
9e2f7c11 LP |
1247 | return -EINVAL; |
1248 | ||
7410616c LP |
1249 | r = unit_name_replace_instance(name, u->instance, &s); |
1250 | if (r < 0) | |
1251 | return r; | |
9e2f7c11 LP |
1252 | |
1253 | name = s; | |
1254 | } | |
1255 | ||
c2756a68 | 1256 | other = manager_get_unit(u->manager, name); |
7410616c LP |
1257 | if (other) |
1258 | return unit_merge(u, other); | |
23a177ef | 1259 | |
7410616c | 1260 | return unit_add_name(u, name); |
23a177ef LP |
1261 | } |
1262 | ||
1263 | Unit* unit_follow_merge(Unit *u) { | |
1264 | assert(u); | |
1265 | ||
ac155bb8 MS |
1266 | while (u->load_state == UNIT_MERGED) |
1267 | assert_se(u = u->merged_into); | |
23a177ef LP |
1268 | |
1269 | return u; | |
1270 | } | |
1271 | ||
1272 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
1273 | int r; | |
1274 | ||
1275 | assert(u); | |
1276 | assert(c); | |
1277 | ||
a8c5a4c6 YW |
1278 | /* Unlike unit_add_dependency() or friends, this always returns 0 on success. */ |
1279 | ||
e1e74614 | 1280 | if (c->working_directory && !c->working_directory_missing_ok) { |
eef85c4a | 1281 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1282 | if (r < 0) |
1283 | return r; | |
1284 | } | |
1285 | ||
1286 | if (c->root_directory) { | |
eef85c4a | 1287 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1288 | if (r < 0) |
1289 | return r; | |
1290 | } | |
1291 | ||
915e6d16 | 1292 | if (c->root_image) { |
eef85c4a | 1293 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
1294 | if (r < 0) |
1295 | return r; | |
1296 | } | |
1297 | ||
12375b95 | 1298 | for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
1299 | if (!u->manager->prefix[dt]) |
1300 | continue; | |
1301 | ||
211a3d87 | 1302 | for (size_t i = 0; i < c->directories[dt].n_items; i++) { |
c2b2df60 | 1303 | _cleanup_free_ char *p = NULL; |
ada5e276 | 1304 | |
211a3d87 | 1305 | p = path_join(u->manager->prefix[dt], c->directories[dt].items[i].path); |
ada5e276 YW |
1306 | if (!p) |
1307 | return -ENOMEM; | |
1308 | ||
eef85c4a | 1309 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
1310 | if (r < 0) |
1311 | return r; | |
1312 | } | |
1313 | } | |
1314 | ||
463d0d15 | 1315 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
1316 | return 0; |
1317 | ||
f3b7a79b LP |
1318 | /* For the following three directory types we need write access, and /var/ is possibly on the root |
1319 | * fs. Hence order after systemd-remount-fs.service, to ensure things are writable. */ | |
211a3d87 LB |
1320 | if (c->directories[EXEC_DIRECTORY_STATE].n_items > 0 || |
1321 | c->directories[EXEC_DIRECTORY_CACHE].n_items > 0 || | |
1322 | c->directories[EXEC_DIRECTORY_LOGS].n_items > 0) { | |
f3b7a79b LP |
1323 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, true, UNIT_DEPENDENCY_FILE); |
1324 | if (r < 0) | |
1325 | return r; | |
1326 | } | |
1327 | ||
b46a529c | 1328 | if (c->private_tmp) { |
d71f0505 | 1329 | |
b2c7d1bb FB |
1330 | /* FIXME: for now we make a special case for /tmp and add a weak dependency on |
1331 | * tmp.mount so /tmp being masked is supported. However there's no reason to treat | |
1332 | * /tmp specifically and masking other mount units should be handled more | |
1333 | * gracefully too, see PR#16894. */ | |
1334 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "tmp.mount", true, UNIT_DEPENDENCY_FILE); | |
1335 | if (r < 0) | |
1336 | return r; | |
1337 | ||
1338 | r = unit_require_mounts_for(u, "/var/tmp", UNIT_DEPENDENCY_FILE); | |
1339 | if (r < 0) | |
1340 | return r; | |
b46a529c | 1341 | |
35d8c19a | 1342 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1343 | if (r < 0) |
1344 | return r; | |
1345 | } | |
1346 | ||
33b58dfb LP |
1347 | if (c->root_image) { |
1348 | /* We need to wait for /dev/loopX to appear when doing RootImage=, hence let's add an | |
1349 | * implicit dependency on udev */ | |
1350 | ||
1351 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_UDEVD_SERVICE, true, UNIT_DEPENDENCY_FILE); | |
1352 | if (r < 0) | |
1353 | return r; | |
1354 | } | |
1355 | ||
52c239d7 LB |
1356 | if (!IN_SET(c->std_output, |
1357 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1358 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
52c239d7 LB |
1359 | !IN_SET(c->std_error, |
1360 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1361 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
91dd5f7c | 1362 | !c->log_namespace) |
23a177ef LP |
1363 | return 0; |
1364 | ||
91dd5f7c LP |
1365 | /* If syslog or kernel logging is requested (or log namespacing is), make sure our own logging daemon |
1366 | * is run first. */ | |
1367 | ||
1368 | if (c->log_namespace) { | |
dc5437c7 | 1369 | _cleanup_free_ char *socket_unit = NULL, *varlink_socket_unit = NULL; |
23a177ef | 1370 | |
91dd5f7c LP |
1371 | r = unit_name_build_from_type("systemd-journald", c->log_namespace, UNIT_SOCKET, &socket_unit); |
1372 | if (r < 0) | |
1373 | return r; | |
1374 | ||
1375 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, socket_unit, true, UNIT_DEPENDENCY_FILE); | |
1376 | if (r < 0) | |
1377 | return r; | |
dc5437c7 LP |
1378 | |
1379 | r = unit_name_build_from_type("systemd-journald-varlink", c->log_namespace, UNIT_SOCKET, &varlink_socket_unit); | |
1380 | if (r < 0) | |
1381 | return r; | |
1382 | ||
1383 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, varlink_socket_unit, true, UNIT_DEPENDENCY_FILE); | |
1384 | if (r < 0) | |
1385 | return r; | |
7d202fb3 | 1386 | } else { |
91dd5f7c | 1387 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, true, UNIT_DEPENDENCY_FILE); |
ce18c396 LP |
1388 | if (r < 0) |
1389 | return r; | |
1390 | } | |
1391 | ||
7d202fb3 YW |
1392 | r = unit_add_default_credential_dependencies(u, c); |
1393 | if (r < 0) | |
1394 | return r; | |
1395 | ||
87f0e418 LP |
1396 | return 0; |
1397 | } | |
1398 | ||
04d232d8 | 1399 | const char* unit_description(Unit *u) { |
87f0e418 LP |
1400 | assert(u); |
1401 | ||
ac155bb8 MS |
1402 | if (u->description) |
1403 | return u->description; | |
87f0e418 | 1404 | |
ac155bb8 | 1405 | return strna(u->id); |
87f0e418 LP |
1406 | } |
1407 | ||
e6a16a82 | 1408 | const char* unit_status_string(Unit *u, char **ret_combined_buffer) { |
2a8f53c6 | 1409 | assert(u); |
04d232d8 | 1410 | assert(u->id); |
2a8f53c6 | 1411 | |
04d232d8 ZJS |
1412 | /* Return u->id, u->description, or "{u->id} - {u->description}". |
1413 | * Versions with u->description are only used if it is set. | |
e6a16a82 ZJS |
1414 | * The last option is used if configured and the caller provided the 'ret_combined_buffer' |
1415 | * pointer. | |
1416 | * | |
1417 | * Note that *ret_combined_buffer may be set to NULL. */ | |
04d232d8 ZJS |
1418 | |
1419 | if (!u->description || | |
1420 | u->manager->status_unit_format == STATUS_UNIT_FORMAT_NAME || | |
e6a16a82 ZJS |
1421 | (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED && !ret_combined_buffer) || |
1422 | streq(u->description, u->id)) { | |
1423 | ||
1424 | if (ret_combined_buffer) | |
1425 | *ret_combined_buffer = NULL; | |
2a8f53c6 | 1426 | return u->id; |
e6a16a82 | 1427 | } |
2a8f53c6 | 1428 | |
e6a16a82 ZJS |
1429 | if (ret_combined_buffer) { |
1430 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED) { | |
1431 | *ret_combined_buffer = strjoin(u->id, " - ", u->description); | |
1432 | if (*ret_combined_buffer) | |
1433 | return *ret_combined_buffer; | |
1434 | log_oom(); /* Fall back to ->description */ | |
04d232d8 | 1435 | } else |
e6a16a82 | 1436 | *ret_combined_buffer = NULL; |
04d232d8 ZJS |
1437 | } |
1438 | ||
1439 | return u->description; | |
2a8f53c6 ZJS |
1440 | } |
1441 | ||
87f0e418 | 1442 | /* Common implementation for multiple backends */ |
c3620770 | 1443 | int unit_load_fragment_and_dropin(Unit *u, bool fragment_required) { |
23a177ef LP |
1444 | int r; |
1445 | ||
1446 | assert(u); | |
23a177ef | 1447 | |
e48614c4 | 1448 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1449 | r = unit_load_fragment(u); |
1450 | if (r < 0) | |
23a177ef LP |
1451 | return r; |
1452 | ||
c3620770 ZJS |
1453 | if (u->load_state == UNIT_STUB) { |
1454 | if (fragment_required) | |
1455 | return -ENOENT; | |
1456 | ||
1457 | u->load_state = UNIT_LOADED; | |
1458 | } | |
23a177ef | 1459 | |
9e4ea9cc ZJS |
1460 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1461 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1462 | * been loaded and which not, at least without doing complicated book-keeping, | |
1463 | * so let's always reread all drop-ins. */ | |
c9e06956 ZJS |
1464 | r = unit_load_dropin(unit_follow_merge(u)); |
1465 | if (r < 0) | |
1466 | return r; | |
1467 | ||
1468 | if (u->source_path) { | |
1469 | struct stat st; | |
1470 | ||
1471 | if (stat(u->source_path, &st) >= 0) | |
1472 | u->source_mtime = timespec_load(&st.st_mtim); | |
1473 | else | |
1474 | u->source_mtime = 0; | |
1475 | } | |
1476 | ||
1477 | return 0; | |
23a177ef LP |
1478 | } |
1479 | ||
19496554 | 1480 | void unit_add_to_target_deps_queue(Unit *u) { |
fbd747a4 | 1481 | Manager *m = ASSERT_PTR(ASSERT_PTR(u)->manager); |
c9958c4f | 1482 | |
19496554 MS |
1483 | if (u->in_target_deps_queue) |
1484 | return; | |
1485 | ||
1486 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1487 | u->in_target_deps_queue = true; | |
1488 | } | |
1489 | ||
bba34eed | 1490 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1491 | assert(u); |
1492 | assert(target); | |
1493 | ||
ac155bb8 | 1494 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1495 | return 0; |
1496 | ||
35b8ca3a | 1497 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1498 | * that loop check below is reliable */ |
ac155bb8 MS |
1499 | if (u->load_state != UNIT_LOADED || |
1500 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1501 | return 0; |
1502 | ||
21256a2b LP |
1503 | /* If either side wants no automatic dependencies, then let's |
1504 | * skip this */ | |
ac155bb8 MS |
1505 | if (!u->default_dependencies || |
1506 | !target->default_dependencies) | |
21256a2b LP |
1507 | return 0; |
1508 | ||
98bc2000 | 1509 | /* Don't create loops */ |
15ed3c3a | 1510 | if (unit_has_dependency(target, UNIT_ATOM_BEFORE, u)) |
98bc2000 LP |
1511 | return 0; |
1512 | ||
eef85c4a | 1513 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1514 | } |
1515 | ||
e954c9cf | 1516 | static int unit_add_slice_dependencies(Unit *u) { |
12f64221 | 1517 | Unit *slice; |
e954c9cf | 1518 | assert(u); |
b81884e7 | 1519 | |
35b7ff80 | 1520 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1521 | return 0; |
1522 | ||
eef85c4a LP |
1523 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1524 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1525 | relationship). */ | |
f6173cb9 | 1526 | UnitDependencyMask mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; |
eef85c4a | 1527 | |
12f64221 LP |
1528 | slice = UNIT_GET_SLICE(u); |
1529 | if (slice) | |
1530 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, slice, true, mask); | |
e954c9cf | 1531 | |
8c8da0e0 | 1532 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1533 | return 0; |
1534 | ||
5a724170 | 1535 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, true, mask); |
98bc2000 LP |
1536 | } |
1537 | ||
e954c9cf | 1538 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1539 | UnitDependencyInfo di; |
1540 | const char *path; | |
a8c5a4c6 | 1541 | bool changed = false; |
9588bc32 LP |
1542 | int r; |
1543 | ||
1544 | assert(u); | |
1545 | ||
90e74a66 | 1546 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for) { |
eef85c4a | 1547 | char prefix[strlen(path) + 1]; |
9588bc32 | 1548 | |
eef85c4a | 1549 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1550 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1551 | Unit *m; |
1552 | ||
c7c89abb | 1553 | r = unit_name_from_path(prefix, ".mount", &p); |
03e52e8c | 1554 | if (r == -EINVAL) |
598a6a84 | 1555 | continue; /* If the path cannot be converted to a mount unit name, then it's |
4076ad9d | 1556 | * not manageable as a unit by systemd, and hence we don't need a |
598a6a84 | 1557 | * dependency on it. Let's thus silently ignore the issue. */ |
9588bc32 LP |
1558 | if (r < 0) |
1559 | return r; | |
c7c89abb FB |
1560 | |
1561 | m = manager_get_unit(u->manager, p); | |
1562 | if (!m) { | |
598a6a84 LP |
1563 | /* Make sure to load the mount unit if it exists. If so the dependencies on |
1564 | * this unit will be added later during the loading of the mount unit. */ | |
c7c89abb | 1565 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); |
9588bc32 | 1566 | continue; |
c7c89abb | 1567 | } |
9588bc32 LP |
1568 | if (m == u) |
1569 | continue; | |
1570 | ||
1571 | if (m->load_state != UNIT_LOADED) | |
1572 | continue; | |
1573 | ||
eef85c4a | 1574 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1575 | if (r < 0) |
1576 | return r; | |
a8c5a4c6 | 1577 | changed = changed || r > 0; |
9588bc32 LP |
1578 | |
1579 | if (m->fragment_path) { | |
eef85c4a | 1580 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1581 | if (r < 0) |
1582 | return r; | |
a8c5a4c6 | 1583 | changed = changed || r > 0; |
9588bc32 LP |
1584 | } |
1585 | } | |
1586 | } | |
1587 | ||
a8c5a4c6 | 1588 | return changed; |
9588bc32 LP |
1589 | } |
1590 | ||
a2db0225 AZ |
1591 | static int unit_add_oomd_dependencies(Unit *u) { |
1592 | CGroupContext *c; | |
2a4efebb ZJS |
1593 | CGroupMask mask; |
1594 | int r; | |
a2db0225 AZ |
1595 | |
1596 | assert(u); | |
1597 | ||
1598 | if (!u->default_dependencies) | |
1599 | return 0; | |
1600 | ||
1601 | c = unit_get_cgroup_context(u); | |
1602 | if (!c) | |
1603 | return 0; | |
1604 | ||
2a4efebb | 1605 | bool wants_oomd = c->moom_swap == MANAGED_OOM_KILL || c->moom_mem_pressure == MANAGED_OOM_KILL; |
a2db0225 AZ |
1606 | if (!wants_oomd) |
1607 | return 0; | |
1608 | ||
2a4efebb ZJS |
1609 | if (!cg_all_unified()) |
1610 | return 0; | |
1611 | ||
1612 | r = cg_mask_supported(&mask); | |
1613 | if (r < 0) | |
1614 | return log_debug_errno(r, "Failed to determine supported controllers: %m"); | |
1615 | ||
1616 | if (!FLAGS_SET(mask, CGROUP_MASK_MEMORY)) | |
1617 | return 0; | |
1618 | ||
a8c5a4c6 | 1619 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "systemd-oomd.service", true, UNIT_DEPENDENCY_FILE); |
a2db0225 AZ |
1620 | } |
1621 | ||
95ae05c0 | 1622 | static int unit_add_startup_units(Unit *u) { |
9dfb6a3a | 1623 | if (!unit_has_startup_cgroup_constraints(u)) |
db785129 LP |
1624 | return 0; |
1625 | ||
de7fef4b | 1626 | return set_ensure_put(&u->manager->startup_units, NULL, u); |
95ae05c0 WC |
1627 | } |
1628 | ||
294446dc LP |
1629 | static int unit_validate_on_failure_job_mode( |
1630 | Unit *u, | |
1631 | const char *job_mode_setting, | |
1632 | JobMode job_mode, | |
1633 | const char *dependency_name, | |
1634 | UnitDependencyAtom atom) { | |
1635 | ||
1636 | Unit *other, *found = NULL; | |
1637 | ||
1638 | if (job_mode != JOB_ISOLATE) | |
1639 | return 0; | |
1640 | ||
1641 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
1642 | if (!found) | |
1643 | found = other; | |
1644 | else if (found != other) | |
1645 | return log_unit_error_errno( | |
1646 | u, SYNTHETIC_ERRNO(ENOEXEC), | |
1647 | "More than one %s dependencies specified but %sisolate set. Refusing.", | |
1648 | dependency_name, job_mode_setting); | |
1649 | } | |
1650 | ||
1651 | return 0; | |
1652 | } | |
1653 | ||
87f0e418 LP |
1654 | int unit_load(Unit *u) { |
1655 | int r; | |
1656 | ||
1657 | assert(u); | |
1658 | ||
ac155bb8 | 1659 | if (u->in_load_queue) { |
71fda00f | 1660 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1661 | u->in_load_queue = false; |
87f0e418 LP |
1662 | } |
1663 | ||
ac155bb8 | 1664 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1665 | return -EINVAL; |
1666 | ||
ac155bb8 | 1667 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1668 | return 0; |
1669 | ||
4f4afc88 | 1670 | if (u->transient_file) { |
66fa4bdd LP |
1671 | /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup |
1672 | * is complete, hence let's synchronize the unit file we just wrote to disk. */ | |
1673 | ||
4f4afc88 LP |
1674 | r = fflush_and_check(u->transient_file); |
1675 | if (r < 0) | |
1676 | goto fail; | |
1677 | ||
50fb00b7 | 1678 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1679 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1680 | } |
1681 | ||
c3784a7d ZJS |
1682 | r = UNIT_VTABLE(u)->load(u); |
1683 | if (r < 0) | |
23a177ef | 1684 | goto fail; |
c3784a7d ZJS |
1685 | |
1686 | assert(u->load_state != UNIT_STUB); | |
23a177ef | 1687 | |
7c8fa05c | 1688 | if (u->load_state == UNIT_LOADED) { |
19496554 | 1689 | unit_add_to_target_deps_queue(u); |
e954c9cf LP |
1690 | |
1691 | r = unit_add_slice_dependencies(u); | |
1692 | if (r < 0) | |
1693 | goto fail; | |
c2756a68 | 1694 | |
e954c9cf | 1695 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1696 | if (r < 0) |
c2756a68 | 1697 | goto fail; |
7c8fa05c | 1698 | |
a2db0225 AZ |
1699 | r = unit_add_oomd_dependencies(u); |
1700 | if (r < 0) | |
1701 | goto fail; | |
1702 | ||
95ae05c0 WC |
1703 | r = unit_add_startup_units(u); |
1704 | if (r < 0) | |
1705 | goto fail; | |
1706 | ||
294446dc LP |
1707 | r = unit_validate_on_failure_job_mode(u, "OnSuccessJobMode=", u->on_success_job_mode, "OnSuccess=", UNIT_ATOM_ON_SUCCESS); |
1708 | if (r < 0) | |
1709 | goto fail; | |
15ed3c3a | 1710 | |
294446dc LP |
1711 | r = unit_validate_on_failure_job_mode(u, "OnFailureJobMode=", u->on_failure_job_mode, "OnFailure=", UNIT_ATOM_ON_FAILURE); |
1712 | if (r < 0) | |
1713 | goto fail; | |
bc432dc7 | 1714 | |
a2df3ea4 MK |
1715 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1716 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1717 | ||
5af88058 LP |
1718 | /* We finished loading, let's ensure our parents recalculate the members mask */ |
1719 | unit_invalidate_cgroup_members_masks(u); | |
f68319bb LP |
1720 | } |
1721 | ||
ac155bb8 | 1722 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1723 | |
1724 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1725 | unit_add_to_gc_queue(u); |
f561e8c6 | 1726 | (void) manager_varlink_send_managed_oom_update(u); |
87f0e418 | 1727 | |
87f0e418 LP |
1728 | return 0; |
1729 | ||
1730 | fail: | |
81be2388 ZJS |
1731 | /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code |
1732 | * should hence return ENOEXEC to ensure units are placed in this state after loading. */ | |
c4555ad8 LP |
1733 | |
1734 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : | |
1735 | r == -ENOEXEC ? UNIT_BAD_SETTING : | |
1736 | UNIT_ERROR; | |
ac155bb8 | 1737 | u->load_error = r; |
c4555ad8 | 1738 | |
c149d2b4 ZJS |
1739 | /* Record the timestamp on the cache, so that if the cache gets updated between now and the next time |
1740 | * an attempt is made to load this unit, we know we need to check again. */ | |
7233e91a | 1741 | if (u->load_state == UNIT_NOT_FOUND) |
c2911d48 | 1742 | u->fragment_not_found_timestamp_hash = u->manager->unit_cache_timestamp_hash; |
7233e91a | 1743 | |
c1e1601e | 1744 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1745 | unit_add_to_gc_queue(u); |
23a177ef | 1746 | |
c4555ad8 | 1747 | return log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
87f0e418 LP |
1748 | } |
1749 | ||
f9f88198 YW |
1750 | _printf_(7, 8) |
1751 | static int log_unit_internal(void *userdata, int level, int error, const char *file, int line, const char *func, const char *format, ...) { | |
1752 | Unit *u = userdata; | |
1753 | va_list ap; | |
1754 | int r; | |
49365733 | 1755 | |
c2503e35 RH |
1756 | if (u && !unit_log_level_test(u, level)) |
1757 | return -ERRNO_VALUE(error); | |
1758 | ||
f9f88198 YW |
1759 | va_start(ap, format); |
1760 | if (u) | |
1761 | r = log_object_internalv(level, error, file, line, func, | |
1762 | u->manager->unit_log_field, | |
1763 | u->id, | |
1764 | u->manager->invocation_log_field, | |
1765 | u->invocation_id_string, | |
1766 | format, ap); | |
1767 | else | |
1768 | r = log_internalv(level, error, file, line, func, format, ap); | |
1769 | va_end(ap); | |
49365733 | 1770 | |
f9f88198 | 1771 | return r; |
49365733 LP |
1772 | } |
1773 | ||
97a3f4ee | 1774 | static bool unit_test_condition(Unit *u) { |
a0b191b7 LP |
1775 | _cleanup_strv_free_ char **env = NULL; |
1776 | int r; | |
1777 | ||
90bbc946 LP |
1778 | assert(u); |
1779 | ||
ac155bb8 | 1780 | dual_timestamp_get(&u->condition_timestamp); |
90bbc946 | 1781 | |
a0b191b7 LP |
1782 | r = manager_get_effective_environment(u->manager, &env); |
1783 | if (r < 0) { | |
1784 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
d52cc0a5 | 1785 | u->condition_result = true; |
a0b191b7 LP |
1786 | } else |
1787 | u->condition_result = condition_test_list( | |
1788 | u->conditions, | |
1789 | env, | |
1790 | condition_type_to_string, | |
1791 | log_unit_internal, | |
1792 | u); | |
e18f8852 | 1793 | |
a0b191b7 | 1794 | unit_add_to_dbus_queue(u); |
ac155bb8 | 1795 | return u->condition_result; |
90bbc946 LP |
1796 | } |
1797 | ||
97a3f4ee | 1798 | static bool unit_test_assert(Unit *u) { |
a0b191b7 LP |
1799 | _cleanup_strv_free_ char **env = NULL; |
1800 | int r; | |
1801 | ||
59fccdc5 LP |
1802 | assert(u); |
1803 | ||
1804 | dual_timestamp_get(&u->assert_timestamp); | |
59fccdc5 | 1805 | |
a0b191b7 LP |
1806 | r = manager_get_effective_environment(u->manager, &env); |
1807 | if (r < 0) { | |
1808 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
1809 | u->assert_result = CONDITION_ERROR; | |
1810 | } else | |
1811 | u->assert_result = condition_test_list( | |
1812 | u->asserts, | |
1813 | env, | |
1814 | assert_type_to_string, | |
1815 | log_unit_internal, | |
1816 | u); | |
e18f8852 | 1817 | |
a0b191b7 | 1818 | unit_add_to_dbus_queue(u); |
59fccdc5 LP |
1819 | return u->assert_result; |
1820 | } | |
1821 | ||
04d232d8 ZJS |
1822 | void unit_status_printf(Unit *u, StatusType status_type, const char *status, const char *format, const char *ident) { |
1823 | if (log_get_show_color()) { | |
1824 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED && strchr(ident, ' ')) | |
1825 | ident = strjoina(ANSI_HIGHLIGHT, u->id, ANSI_NORMAL, " - ", u->description); | |
1826 | else | |
1827 | ident = strjoina(ANSI_HIGHLIGHT, ident, ANSI_NORMAL); | |
1828 | } | |
5b262f74 | 1829 | |
df446f96 | 1830 | DISABLE_WARNING_FORMAT_NONLITERAL; |
04d232d8 | 1831 | manager_status_printf(u->manager, status_type, status, format, ident); |
df446f96 LP |
1832 | REENABLE_WARNING; |
1833 | } | |
1834 | ||
97a3f4ee | 1835 | int unit_test_start_limit(Unit *u) { |
429926e9 TR |
1836 | const char *reason; |
1837 | ||
6bf0f408 LP |
1838 | assert(u); |
1839 | ||
7bf081a1 | 1840 | if (ratelimit_below(&u->start_ratelimit)) { |
6bf0f408 LP |
1841 | u->start_limit_hit = false; |
1842 | return 0; | |
1843 | } | |
1844 | ||
1845 | log_unit_warning(u, "Start request repeated too quickly."); | |
1846 | u->start_limit_hit = true; | |
1847 | ||
429926e9 TR |
1848 | reason = strjoina("unit ", u->id, " failed"); |
1849 | ||
36c4dc08 LP |
1850 | emergency_action(u->manager, u->start_limit_action, |
1851 | EMERGENCY_ACTION_IS_WATCHDOG|EMERGENCY_ACTION_WARN, | |
1852 | u->reboot_arg, -1, reason); | |
1853 | ||
1854 | return -ECANCELED; | |
6bf0f408 LP |
1855 | } |
1856 | ||
631b676b LP |
1857 | static bool unit_verify_deps(Unit *u) { |
1858 | Unit *other; | |
631b676b LP |
1859 | |
1860 | assert(u); | |
1861 | ||
defe63b0 LP |
1862 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined |
1863 | * with After=. We do not check Requires= or Requisite= here as they only should have an effect on | |
1864 | * the job processing, but do not have any effect afterwards. We don't check BindsTo= dependencies | |
1865 | * that are not used in conjunction with After= as for them any such check would make things entirely | |
1866 | * racy. */ | |
631b676b | 1867 | |
15ed3c3a | 1868 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { |
631b676b | 1869 | |
15ed3c3a | 1870 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other)) |
631b676b LP |
1871 | continue; |
1872 | ||
1873 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1874 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1875 | return false; | |
1876 | } | |
1877 | } | |
1878 | ||
1879 | return true; | |
1880 | } | |
1881 | ||
9adb6959 | 1882 | /* Errors that aren't really errors: |
6bf0f408 | 1883 | * -EALREADY: Unit is already started. |
9adb6959 | 1884 | * -ECOMM: Condition failed |
6bf0f408 | 1885 | * -EAGAIN: An operation is already in progress. Retry later. |
9adb6959 LP |
1886 | * |
1887 | * Errors that are real errors: | |
1888 | * -EBADR: This unit type does not support starting. | |
2de9b979 | 1889 | * -ECANCELED: Start limit hit, too many requests for now |
6bf0f408 LP |
1890 | * -EPROTO: Assert failed |
1891 | * -EINVAL: Unit not loaded | |
1892 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1893 | * -ENOLINK: The necessary dependencies are not fulfilled. |
d4fd1cf2 | 1894 | * -ESTALE: This unit has been started before and can't be started a second time |
a4191c9f | 1895 | * -ENOENT: This is a triggering unit and unit to trigger is not loaded |
87f0e418 | 1896 | */ |
48b92b37 | 1897 | int unit_start(Unit *u, ActivationDetails *details) { |
87f0e418 | 1898 | UnitActiveState state; |
92ab323c | 1899 | Unit *following; |
5f37c1a9 | 1900 | int r; |
87f0e418 LP |
1901 | |
1902 | assert(u); | |
1903 | ||
47261967 LP |
1904 | /* Let's hold off running start jobs for mount units when /proc/self/mountinfo monitor is ratelimited. */ |
1905 | if (UNIT_VTABLE(u)->subsystem_ratelimited) { | |
1906 | r = UNIT_VTABLE(u)->subsystem_ratelimited(u->manager); | |
1907 | if (r < 0) | |
1908 | return r; | |
1909 | if (r > 0) | |
1910 | return -EAGAIN; | |
1911 | } | |
b161bc39 | 1912 | |
5766aca8 LP |
1913 | /* If this is already started, then this will succeed. Note that this will even succeed if this unit |
1914 | * is not startable by the user. This is relied on to detect when we need to wait for units and when | |
1915 | * waiting is finished. */ | |
87f0e418 LP |
1916 | state = unit_active_state(u); |
1917 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1918 | return -EALREADY; | |
380dc8b0 LP |
1919 | if (state == UNIT_MAINTENANCE) |
1920 | return -EAGAIN; | |
87f0e418 | 1921 | |
6bf0f408 LP |
1922 | /* Units that aren't loaded cannot be started */ |
1923 | if (u->load_state != UNIT_LOADED) | |
1924 | return -EINVAL; | |
1925 | ||
d4fd1cf2 LP |
1926 | /* Refuse starting scope units more than once */ |
1927 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1928 | return -ESTALE; | |
1929 | ||
4e1ac54e | 1930 | /* If the conditions were unmet, don't do anything at all. If we already are activating this call might |
5766aca8 LP |
1931 | * still be useful to speed up activation in case there is some hold-off time, but we don't want to |
1932 | * recheck the condition in that case. */ | |
a82e5507 | 1933 | if (state != UNIT_ACTIVATING && |
5af6aa58 | 1934 | !unit_test_condition(u)) |
4e1ac54e | 1935 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(ECOMM), "Starting requested but condition not met. Not starting unit."); |
52661efd | 1936 | |
59fccdc5 LP |
1937 | /* If the asserts failed, fail the entire job */ |
1938 | if (state != UNIT_ACTIVATING && | |
5766aca8 LP |
1939 | !unit_test_assert(u)) |
1940 | return log_unit_notice_errno(u, SYNTHETIC_ERRNO(EPROTO), "Starting requested but asserts failed."); | |
59fccdc5 | 1941 | |
5766aca8 LP |
1942 | /* Units of types that aren't supported cannot be started. Note that we do this test only after the |
1943 | * condition checks, so that we rather return condition check errors (which are usually not | |
1944 | * considered a true failure) than "not supported" errors (which are considered a failure). | |
d11a7645 | 1945 | */ |
96cf3ec9 | 1946 | if (!unit_type_supported(u->type)) |
d11a7645 LP |
1947 | return -EOPNOTSUPP; |
1948 | ||
5766aca8 LP |
1949 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine |
1950 | * should have taken care of this already, but let's check this here again. After all, our | |
413e8650 | 1951 | * dependencies might not be in effect anymore, due to a reload or due to an unmet condition. */ |
631b676b LP |
1952 | if (!unit_verify_deps(u)) |
1953 | return -ENOLINK; | |
1954 | ||
92ab323c | 1955 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1956 | following = unit_following(u); |
1957 | if (following) { | |
f2341e0a | 1958 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
48b92b37 | 1959 | return unit_start(following, details); |
92ab323c LP |
1960 | } |
1961 | ||
705578c3 MS |
1962 | /* Check our ability to start early so that failure conditions don't cause us to enter a busy loop. */ |
1963 | if (UNIT_VTABLE(u)->can_start) { | |
1964 | r = UNIT_VTABLE(u)->can_start(u); | |
ce2146f5 DDM |
1965 | if (r < 0) |
1966 | return r; | |
1967 | } | |
1968 | ||
92ab323c LP |
1969 | /* If it is stopped, but we cannot start it, then fail */ |
1970 | if (!UNIT_VTABLE(u)->start) | |
1971 | return -EBADR; | |
1972 | ||
5766aca8 LP |
1973 | /* We don't suppress calls to ->start() here when we are already starting, to allow this request to |
1974 | * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it | |
1975 | * waits for a holdoff timer to elapse before it will start again. */ | |
87f0e418 | 1976 | |
c1e1601e | 1977 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 1978 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 1979 | |
48b92b37 LB |
1980 | if (!u->activation_details) /* Older details object wins */ |
1981 | u->activation_details = activation_details_ref(details); | |
1982 | ||
d1a34ae9 | 1983 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1984 | } |
1985 | ||
1986 | bool unit_can_start(Unit *u) { | |
1987 | assert(u); | |
1988 | ||
8ff4d2ab LP |
1989 | if (u->load_state != UNIT_LOADED) |
1990 | return false; | |
1991 | ||
96cf3ec9 | 1992 | if (!unit_type_supported(u->type)) |
8ff4d2ab LP |
1993 | return false; |
1994 | ||
d4fd1cf2 LP |
1995 | /* Scope units may be started only once */ |
1996 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
1997 | return false; | |
1998 | ||
87f0e418 LP |
1999 | return !!UNIT_VTABLE(u)->start; |
2000 | } | |
2001 | ||
2528a7a6 LP |
2002 | bool unit_can_isolate(Unit *u) { |
2003 | assert(u); | |
2004 | ||
2005 | return unit_can_start(u) && | |
ac155bb8 | 2006 | u->allow_isolate; |
2528a7a6 LP |
2007 | } |
2008 | ||
87f0e418 LP |
2009 | /* Errors: |
2010 | * -EBADR: This unit type does not support stopping. | |
2011 | * -EALREADY: Unit is already stopped. | |
2012 | * -EAGAIN: An operation is already in progress. Retry later. | |
2013 | */ | |
2014 | int unit_stop(Unit *u) { | |
2015 | UnitActiveState state; | |
92ab323c | 2016 | Unit *following; |
87f0e418 LP |
2017 | |
2018 | assert(u); | |
2019 | ||
87f0e418 | 2020 | state = unit_active_state(u); |
fdf20a31 | 2021 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
2022 | return -EALREADY; |
2023 | ||
0faacd47 LP |
2024 | following = unit_following(u); |
2025 | if (following) { | |
f2341e0a | 2026 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
2027 | return unit_stop(following); |
2028 | } | |
2029 | ||
7898b0cf LP |
2030 | if (!UNIT_VTABLE(u)->stop) |
2031 | return -EBADR; | |
2032 | ||
c1e1601e | 2033 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 2034 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 2035 | |
d1a34ae9 | 2036 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
2037 | } |
2038 | ||
f5869324 LP |
2039 | bool unit_can_stop(Unit *u) { |
2040 | assert(u); | |
2041 | ||
39c79477 ZJS |
2042 | /* Note: if we return true here, it does not mean that the unit may be successfully stopped. |
2043 | * Extrinsic units follow external state and they may stop following external state changes | |
2044 | * (hence we return true here), but an attempt to do this through the manager will fail. */ | |
2045 | ||
96cf3ec9 | 2046 | if (!unit_type_supported(u->type)) |
f5869324 LP |
2047 | return false; |
2048 | ||
2049 | if (u->perpetual) | |
2050 | return false; | |
2051 | ||
2052 | return !!UNIT_VTABLE(u)->stop; | |
2053 | } | |
2054 | ||
87f0e418 LP |
2055 | /* Errors: |
2056 | * -EBADR: This unit type does not support reloading. | |
2057 | * -ENOEXEC: Unit is not started. | |
2058 | * -EAGAIN: An operation is already in progress. Retry later. | |
2059 | */ | |
2060 | int unit_reload(Unit *u) { | |
2061 | UnitActiveState state; | |
92ab323c | 2062 | Unit *following; |
87f0e418 LP |
2063 | |
2064 | assert(u); | |
2065 | ||
ac155bb8 | 2066 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
2067 | return -EINVAL; |
2068 | ||
87f0e418 LP |
2069 | if (!unit_can_reload(u)) |
2070 | return -EBADR; | |
2071 | ||
2072 | state = unit_active_state(u); | |
e364ad06 | 2073 | if (state == UNIT_RELOADING) |
6255af75 | 2074 | return -EAGAIN; |
87f0e418 | 2075 | |
d85ff944 YW |
2076 | if (state != UNIT_ACTIVE) |
2077 | return log_unit_warning_errno(u, SYNTHETIC_ERRNO(ENOEXEC), "Unit cannot be reloaded because it is inactive."); | |
87f0e418 | 2078 | |
e48614c4 ZJS |
2079 | following = unit_following(u); |
2080 | if (following) { | |
f2341e0a | 2081 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
2082 | return unit_reload(following); |
2083 | } | |
2084 | ||
c1e1601e | 2085 | unit_add_to_dbus_queue(u); |
82a2b6bb | 2086 | |
f54bcca5 JR |
2087 | if (!UNIT_VTABLE(u)->reload) { |
2088 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
96b09de5 | 2089 | unit_notify(u, unit_active_state(u), unit_active_state(u), /* reload_success = */ true); |
f54bcca5 JR |
2090 | return 0; |
2091 | } | |
2092 | ||
d9e45bc3 MS |
2093 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
2094 | ||
d1a34ae9 | 2095 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
2096 | } |
2097 | ||
2098 | bool unit_can_reload(Unit *u) { | |
2099 | assert(u); | |
2100 | ||
f54bcca5 JR |
2101 | if (UNIT_VTABLE(u)->can_reload) |
2102 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 2103 | |
15ed3c3a | 2104 | if (unit_has_dependency(u, UNIT_ATOM_PROPAGATES_RELOAD_TO, NULL)) |
87f0e418 LP |
2105 | return true; |
2106 | ||
f54bcca5 | 2107 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
2108 | } |
2109 | ||
a3c1168a | 2110 | bool unit_is_unneeded(Unit *u) { |
15ed3c3a | 2111 | Unit *other; |
f3bff0eb LP |
2112 | assert(u); |
2113 | ||
ac155bb8 | 2114 | if (!u->stop_when_unneeded) |
a3c1168a | 2115 | return false; |
f3bff0eb | 2116 | |
a3c1168a | 2117 | /* Don't clean up while the unit is transitioning or is even inactive. */ |
116654d2 | 2118 | if (unit_active_state(u) != UNIT_ACTIVE) |
a3c1168a LP |
2119 | return false; |
2120 | if (u->job) | |
2121 | return false; | |
f3bff0eb | 2122 | |
15ed3c3a | 2123 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_PINS_STOP_WHEN_UNNEEDED) { |
fda09318 | 2124 | /* If a dependent unit has a job queued, is active or transitioning, or is marked for |
a3c1168a | 2125 | * restart, then don't clean this one up. */ |
b81884e7 | 2126 | |
15ed3c3a LP |
2127 | if (other->job) |
2128 | return false; | |
a3c1168a | 2129 | |
15ed3c3a LP |
2130 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
2131 | return false; | |
a3c1168a | 2132 | |
15ed3c3a LP |
2133 | if (unit_will_restart(other)) |
2134 | return false; | |
bea355da LP |
2135 | } |
2136 | ||
a3c1168a LP |
2137 | return true; |
2138 | } | |
f3bff0eb | 2139 | |
0bc488c9 LP |
2140 | bool unit_is_upheld_by_active(Unit *u, Unit **ret_culprit) { |
2141 | Unit *other; | |
2142 | ||
2143 | assert(u); | |
2144 | ||
2145 | /* Checks if the unit needs to be started because it currently is not running, but some other unit | |
2146 | * that is active declared an Uphold= dependencies on it */ | |
2147 | ||
2148 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) || u->job) { | |
2149 | if (ret_culprit) | |
2150 | *ret_culprit = NULL; | |
2151 | return false; | |
2152 | } | |
2153 | ||
2154 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_START_STEADILY) { | |
2155 | if (other->job) | |
2156 | continue; | |
2157 | ||
2158 | if (UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
2159 | if (ret_culprit) | |
2160 | *ret_culprit = other; | |
2161 | return true; | |
2162 | } | |
2163 | } | |
2164 | ||
2165 | if (ret_culprit) | |
2166 | *ret_culprit = NULL; | |
2167 | return false; | |
2168 | } | |
2169 | ||
56c59592 LP |
2170 | bool unit_is_bound_by_inactive(Unit *u, Unit **ret_culprit) { |
2171 | Unit *other; | |
2172 | ||
2173 | assert(u); | |
2174 | ||
2175 | /* Checks whether this unit is bound to another unit that is inactive, i.e. whether we should stop | |
7802194a | 2176 | * because the other unit is down. */ |
56c59592 LP |
2177 | |
2178 | if (unit_active_state(u) != UNIT_ACTIVE || u->job) { | |
2179 | /* Don't clean up while the unit is transitioning or is even inactive. */ | |
2180 | if (ret_culprit) | |
2181 | *ret_culprit = NULL; | |
2182 | return false; | |
2183 | } | |
2184 | ||
2185 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { | |
2186 | if (other->job) | |
2187 | continue; | |
2188 | ||
2189 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) { | |
3da36106 | 2190 | if (ret_culprit) |
56c59592 LP |
2191 | *ret_culprit = other; |
2192 | ||
2193 | return true; | |
2194 | } | |
2195 | } | |
2196 | ||
2197 | if (ret_culprit) | |
2198 | *ret_culprit = NULL; | |
2199 | return false; | |
2200 | } | |
2201 | ||
a3c1168a | 2202 | static void check_unneeded_dependencies(Unit *u) { |
15ed3c3a | 2203 | Unit *other; |
a3c1168a LP |
2204 | assert(u); |
2205 | ||
2206 | /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */ | |
2207 | ||
15ed3c3a LP |
2208 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_STOP_WHEN_UNNEEDED_QUEUE) |
2209 | unit_submit_to_stop_when_unneeded_queue(other); | |
f3bff0eb LP |
2210 | } |
2211 | ||
0bc488c9 LP |
2212 | static void check_uphold_dependencies(Unit *u) { |
2213 | Unit *other; | |
2214 | assert(u); | |
2215 | ||
2216 | /* Add all units this unit depends on to the queue that processes Uphold= behaviour. */ | |
2217 | ||
2218 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_START_WHEN_UPHELD_QUEUE) | |
2219 | unit_submit_to_start_when_upheld_queue(other); | |
2220 | } | |
2221 | ||
56c59592 | 2222 | static void check_bound_by_dependencies(Unit *u) { |
ff502445 | 2223 | Unit *other; |
ff502445 LP |
2224 | assert(u); |
2225 | ||
56c59592 | 2226 | /* Add all units this unit depends on to the queue that processes BindsTo= stop behaviour. */ |
ff502445 | 2227 | |
56c59592 LP |
2228 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_CANNOT_BE_ACTIVE_WITHOUT_QUEUE) |
2229 | unit_submit_to_stop_when_bound_queue(other); | |
ff502445 LP |
2230 | } |
2231 | ||
87f0e418 | 2232 | static void retroactively_start_dependencies(Unit *u) { |
87f0e418 LP |
2233 | Unit *other; |
2234 | ||
2235 | assert(u); | |
2236 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2237 | ||
15ed3c3a LP |
2238 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_REPLACE) /* Requires= + BindsTo= */ |
2239 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
b81884e7 | 2240 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2241 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
b81884e7 | 2242 | |
15ed3c3a LP |
2243 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_FAIL) /* Wants= */ |
2244 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
b81884e7 | 2245 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2246 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL, NULL); |
87f0e418 | 2247 | |
15ed3c3a | 2248 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_START) /* Conflicts= (and inverse) */ |
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); |
87f0e418 LP |
2251 | } |
2252 | ||
2253 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 LP |
2254 | Unit *other; |
2255 | ||
2256 | assert(u); | |
2257 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2258 | ||
b81884e7 | 2259 | /* Pull down units which are bound to us recursively if enabled */ |
15ed3c3a | 2260 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_STOP) /* BoundBy= */ |
b81884e7 | 2261 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2262 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
cd0504d0 MS |
2263 | } |
2264 | ||
294446dc LP |
2265 | void unit_start_on_failure( |
2266 | Unit *u, | |
2267 | const char *dependency_name, | |
2268 | UnitDependencyAtom atom, | |
2269 | JobMode job_mode) { | |
2270 | ||
82acee14 | 2271 | int n_jobs = -1; |
c0daa706 | 2272 | Unit *other; |
7f66b026 | 2273 | int r; |
c0daa706 LP |
2274 | |
2275 | assert(u); | |
294446dc LP |
2276 | assert(dependency_name); |
2277 | assert(IN_SET(atom, UNIT_ATOM_ON_SUCCESS, UNIT_ATOM_ON_FAILURE)); | |
2278 | ||
2279 | /* Act on OnFailure= and OnSuccess= dependencies */ | |
c0daa706 | 2280 | |
294446dc | 2281 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { |
7f66b026 | 2282 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
222ae6a8 | 2283 | |
82acee14 | 2284 | if (n_jobs < 0) { |
294446dc | 2285 | log_unit_info(u, "Triggering %s dependencies.", dependency_name); |
82acee14 | 2286 | n_jobs = 0; |
15ed3c3a LP |
2287 | } |
2288 | ||
95c81c55 | 2289 | r = manager_add_job(u->manager, JOB_START, other, job_mode, NULL, &error, NULL); |
c1b6628d | 2290 | if (r < 0) |
294446dc LP |
2291 | log_unit_warning_errno( |
2292 | u, r, "Failed to enqueue %s job, ignoring: %s", | |
2293 | dependency_name, bus_error_message(&error, r)); | |
82acee14 | 2294 | n_jobs ++; |
222ae6a8 | 2295 | } |
294446dc | 2296 | |
82acee14 | 2297 | if (n_jobs >= 0) |
c0f86d66 | 2298 | log_unit_debug(u, "Triggering %s dependencies done (%i %s).", |
82acee14 | 2299 | dependency_name, n_jobs, n_jobs == 1 ? "job" : "jobs"); |
c0daa706 LP |
2300 | } |
2301 | ||
3ecaa09b LP |
2302 | void unit_trigger_notify(Unit *u) { |
2303 | Unit *other; | |
3ecaa09b LP |
2304 | |
2305 | assert(u); | |
2306 | ||
15ed3c3a | 2307 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_TRIGGERED_BY) |
3ecaa09b LP |
2308 | if (UNIT_VTABLE(other)->trigger_notify) |
2309 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2310 | } | |
2311 | ||
37109b85 ZJS |
2312 | static int raise_level(int log_level, bool condition_info, bool condition_notice) { |
2313 | if (condition_notice && log_level > LOG_NOTICE) | |
2314 | return LOG_NOTICE; | |
2315 | if (condition_info && log_level > LOG_INFO) | |
2316 | return LOG_INFO; | |
2317 | return log_level; | |
2318 | } | |
2319 | ||
915b1d01 | 2320 | static int unit_log_resources(Unit *u) { |
bc40a20e LP |
2321 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + _CGROUP_IO_ACCOUNTING_METRIC_MAX + 4]; |
2322 | bool any_traffic = false, have_ip_accounting = false, any_io = false, have_io_accounting = false; | |
2323 | _cleanup_free_ char *igress = NULL, *egress = NULL, *rr = NULL, *wr = NULL; | |
162392b7 | 2324 | int log_level = LOG_DEBUG; /* May be raised if resources consumed over a threshold */ |
915b1d01 | 2325 | size_t n_message_parts = 0, n_iovec = 0; |
bc40a20e | 2326 | char* message_parts[1 + 2 + 2 + 1], *t; |
915b1d01 | 2327 | nsec_t nsec = NSEC_INFINITY; |
915b1d01 LP |
2328 | int r; |
2329 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2330 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2331 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2332 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2333 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2334 | }; | |
bc40a20e LP |
2335 | const char* const io_fields[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
2336 | [CGROUP_IO_READ_BYTES] = "IO_METRIC_READ_BYTES", | |
2337 | [CGROUP_IO_WRITE_BYTES] = "IO_METRIC_WRITE_BYTES", | |
2338 | [CGROUP_IO_READ_OPERATIONS] = "IO_METRIC_READ_OPERATIONS", | |
2339 | [CGROUP_IO_WRITE_OPERATIONS] = "IO_METRIC_WRITE_OPERATIONS", | |
2340 | }; | |
915b1d01 LP |
2341 | |
2342 | assert(u); | |
2343 | ||
2344 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2345 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2346 | * information and the complete data in structured fields. */ | |
2347 | ||
2348 | (void) unit_get_cpu_usage(u, &nsec); | |
2349 | if (nsec != NSEC_INFINITY) { | |
915b1d01 LP |
2350 | /* Format the CPU time for inclusion in the structured log message */ |
2351 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2352 | r = log_oom(); | |
2353 | goto finish; | |
2354 | } | |
2355 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2356 | ||
2357 | /* Format the CPU time for inclusion in the human language message string */ | |
5291f26d | 2358 | t = strjoin("consumed ", FORMAT_TIMESPAN(nsec / NSEC_PER_USEC, USEC_PER_MSEC), " CPU time"); |
915b1d01 LP |
2359 | if (!t) { |
2360 | r = log_oom(); | |
2361 | goto finish; | |
2362 | } | |
2363 | ||
2364 | message_parts[n_message_parts++] = t; | |
37109b85 ZJS |
2365 | |
2366 | log_level = raise_level(log_level, | |
ef6bb4dd CG |
2367 | nsec > MENTIONWORTHY_CPU_NSEC, |
2368 | nsec > NOTICEWORTHY_CPU_NSEC); | |
915b1d01 LP |
2369 | } |
2370 | ||
bc40a20e | 2371 | for (CGroupIOAccountingMetric k = 0; k < _CGROUP_IO_ACCOUNTING_METRIC_MAX; k++) { |
bc40a20e LP |
2372 | uint64_t value = UINT64_MAX; |
2373 | ||
2374 | assert(io_fields[k]); | |
2375 | ||
2376 | (void) unit_get_io_accounting(u, k, k > 0, &value); | |
2377 | if (value == UINT64_MAX) | |
2378 | continue; | |
2379 | ||
2380 | have_io_accounting = true; | |
2381 | if (value > 0) | |
2382 | any_io = true; | |
2383 | ||
2384 | /* Format IO accounting data for inclusion in the structured log message */ | |
2385 | if (asprintf(&t, "%s=%" PRIu64, io_fields[k], value) < 0) { | |
2386 | r = log_oom(); | |
2387 | goto finish; | |
2388 | } | |
2389 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2390 | ||
2391 | /* Format the IO accounting data for inclusion in the human language message string, but only | |
2392 | * for the bytes counters (and not for the operations counters) */ | |
2393 | if (k == CGROUP_IO_READ_BYTES) { | |
2394 | assert(!rr); | |
2b59bf51 | 2395 | rr = strjoin("read ", strna(FORMAT_BYTES(value)), " from disk"); |
bc40a20e LP |
2396 | if (!rr) { |
2397 | r = log_oom(); | |
2398 | goto finish; | |
2399 | } | |
2400 | } else if (k == CGROUP_IO_WRITE_BYTES) { | |
2401 | assert(!wr); | |
2b59bf51 | 2402 | wr = strjoin("written ", strna(FORMAT_BYTES(value)), " to disk"); |
bc40a20e LP |
2403 | if (!wr) { |
2404 | r = log_oom(); | |
2405 | goto finish; | |
2406 | } | |
2407 | } | |
37109b85 ZJS |
2408 | |
2409 | if (IN_SET(k, CGROUP_IO_READ_BYTES, CGROUP_IO_WRITE_BYTES)) | |
2410 | log_level = raise_level(log_level, | |
2411 | value > MENTIONWORTHY_IO_BYTES, | |
2412 | value > NOTICEWORTHY_IO_BYTES); | |
bc40a20e LP |
2413 | } |
2414 | ||
2415 | if (have_io_accounting) { | |
2416 | if (any_io) { | |
2417 | if (rr) | |
2418 | message_parts[n_message_parts++] = TAKE_PTR(rr); | |
2419 | if (wr) | |
2420 | message_parts[n_message_parts++] = TAKE_PTR(wr); | |
2421 | ||
2422 | } else { | |
2423 | char *k; | |
2424 | ||
2425 | k = strdup("no IO"); | |
2426 | if (!k) { | |
2427 | r = log_oom(); | |
2428 | goto finish; | |
2429 | } | |
2430 | ||
2431 | message_parts[n_message_parts++] = k; | |
2432 | } | |
2433 | } | |
2434 | ||
12375b95 | 2435 | for (CGroupIPAccountingMetric m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
915b1d01 LP |
2436 | uint64_t value = UINT64_MAX; |
2437 | ||
2438 | assert(ip_fields[m]); | |
2439 | ||
2440 | (void) unit_get_ip_accounting(u, m, &value); | |
2441 | if (value == UINT64_MAX) | |
2442 | continue; | |
82044702 LP |
2443 | |
2444 | have_ip_accounting = true; | |
a87b1faa LP |
2445 | if (value > 0) |
2446 | any_traffic = true; | |
915b1d01 LP |
2447 | |
2448 | /* Format IP accounting data for inclusion in the structured log message */ | |
2449 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2450 | r = log_oom(); | |
2451 | goto finish; | |
2452 | } | |
2453 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2454 | ||
2455 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2456 | * bytes counters (and not for the packets counters) */ | |
a87b1faa LP |
2457 | if (m == CGROUP_IP_INGRESS_BYTES) { |
2458 | assert(!igress); | |
2b59bf51 | 2459 | igress = strjoin("received ", strna(FORMAT_BYTES(value)), " IP traffic"); |
a87b1faa LP |
2460 | if (!igress) { |
2461 | r = log_oom(); | |
2462 | goto finish; | |
2463 | } | |
2464 | } else if (m == CGROUP_IP_EGRESS_BYTES) { | |
2465 | assert(!egress); | |
2b59bf51 | 2466 | egress = strjoin("sent ", strna(FORMAT_BYTES(value)), " IP traffic"); |
a87b1faa LP |
2467 | if (!egress) { |
2468 | r = log_oom(); | |
2469 | goto finish; | |
2470 | } | |
2471 | } | |
37109b85 ZJS |
2472 | |
2473 | if (IN_SET(m, CGROUP_IP_INGRESS_BYTES, CGROUP_IP_EGRESS_BYTES)) | |
2474 | log_level = raise_level(log_level, | |
2475 | value > MENTIONWORTHY_IP_BYTES, | |
2476 | value > NOTICEWORTHY_IP_BYTES); | |
a87b1faa LP |
2477 | } |
2478 | ||
c2503e35 RH |
2479 | /* This check is here because it is the earliest point following all possible log_level assignments. If |
2480 | * log_level is assigned anywhere after this point, move this check. */ | |
2481 | if (!unit_log_level_test(u, log_level)) { | |
2482 | r = 0; | |
2483 | goto finish; | |
2484 | } | |
2485 | ||
82044702 LP |
2486 | if (have_ip_accounting) { |
2487 | if (any_traffic) { | |
2488 | if (igress) | |
2489 | message_parts[n_message_parts++] = TAKE_PTR(igress); | |
2490 | if (egress) | |
2491 | message_parts[n_message_parts++] = TAKE_PTR(egress); | |
a87b1faa | 2492 | |
82044702 LP |
2493 | } else { |
2494 | char *k; | |
915b1d01 | 2495 | |
82044702 LP |
2496 | k = strdup("no IP traffic"); |
2497 | if (!k) { | |
2498 | r = log_oom(); | |
2499 | goto finish; | |
2500 | } | |
2501 | ||
2502 | message_parts[n_message_parts++] = k; | |
2503 | } | |
915b1d01 LP |
2504 | } |
2505 | ||
2506 | /* Is there any accounting data available at all? */ | |
2507 | if (n_iovec == 0) { | |
2508 | r = 0; | |
2509 | goto finish; | |
2510 | } | |
2511 | ||
2512 | if (n_message_parts == 0) | |
a87b1faa | 2513 | t = strjoina("MESSAGE=", u->id, ": Completed."); |
915b1d01 | 2514 | else { |
c2b2df60 | 2515 | _cleanup_free_ char *joined = NULL; |
915b1d01 LP |
2516 | |
2517 | message_parts[n_message_parts] = NULL; | |
2518 | ||
2519 | joined = strv_join(message_parts, ", "); | |
2520 | if (!joined) { | |
2521 | r = log_oom(); | |
2522 | goto finish; | |
2523 | } | |
2524 | ||
ec9d636b | 2525 | joined[0] = ascii_toupper(joined[0]); |
a87b1faa | 2526 | t = strjoina("MESSAGE=", u->id, ": ", joined, "."); |
915b1d01 LP |
2527 | } |
2528 | ||
2529 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2530 | * and hence don't increase n_iovec for them */ | |
2531 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2532 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2533 | ||
2534 | t = strjoina(u->manager->unit_log_field, u->id); | |
2535 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2536 | ||
2537 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2538 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2539 | ||
c2503e35 | 2540 | log_unit_struct_iovec(u, log_level, iovec, n_iovec + 4); |
915b1d01 LP |
2541 | r = 0; |
2542 | ||
2543 | finish: | |
24ae45cb | 2544 | free_many_charp(message_parts, n_message_parts); |
915b1d01 | 2545 | |
12375b95 | 2546 | for (size_t i = 0; i < n_iovec; i++) |
915b1d01 LP |
2547 | free(iovec[i].iov_base); |
2548 | ||
2549 | return r; | |
2550 | ||
2551 | } | |
2552 | ||
adefcf28 LP |
2553 | static void unit_update_on_console(Unit *u) { |
2554 | bool b; | |
2555 | ||
2556 | assert(u); | |
2557 | ||
2558 | b = unit_needs_console(u); | |
2559 | if (u->on_console == b) | |
2560 | return; | |
2561 | ||
2562 | u->on_console = b; | |
2563 | if (b) | |
2564 | manager_ref_console(u->manager); | |
2565 | else | |
2566 | manager_unref_console(u->manager); | |
adefcf28 LP |
2567 | } |
2568 | ||
6eb65e7c LP |
2569 | static void unit_emit_audit_start(Unit *u) { |
2570 | assert(u); | |
2571 | ||
d52b8493 | 2572 | if (UNIT_VTABLE(u)->audit_start_message_type <= 0) |
6eb65e7c LP |
2573 | return; |
2574 | ||
2575 | /* Write audit record if we have just finished starting up */ | |
d52b8493 | 2576 | manager_send_unit_audit(u->manager, u, UNIT_VTABLE(u)->audit_start_message_type, /* success= */ true); |
6eb65e7c LP |
2577 | u->in_audit = true; |
2578 | } | |
2579 | ||
2580 | static void unit_emit_audit_stop(Unit *u, UnitActiveState state) { | |
2581 | assert(u); | |
2582 | ||
d52b8493 | 2583 | if (UNIT_VTABLE(u)->audit_start_message_type <= 0) |
6eb65e7c LP |
2584 | return; |
2585 | ||
2586 | if (u->in_audit) { | |
2587 | /* Write audit record if we have just finished shutting down */ | |
d52b8493 | 2588 | manager_send_unit_audit(u->manager, u, UNIT_VTABLE(u)->audit_stop_message_type, /* success= */ state == UNIT_INACTIVE); |
6eb65e7c LP |
2589 | u->in_audit = false; |
2590 | } else { | |
2591 | /* Hmm, if there was no start record written write it now, so that we always have a nice pair */ | |
d52b8493 | 2592 | manager_send_unit_audit(u->manager, u, UNIT_VTABLE(u)->audit_start_message_type, /* success= */ state == UNIT_INACTIVE); |
6eb65e7c LP |
2593 | |
2594 | if (state == UNIT_INACTIVE) | |
d52b8493 | 2595 | manager_send_unit_audit(u->manager, u, UNIT_VTABLE(u)->audit_stop_message_type, /* success= */ true); |
6eb65e7c LP |
2596 | } |
2597 | } | |
2598 | ||
96b09de5 | 2599 | static bool unit_process_job(Job *j, UnitActiveState ns, bool reload_success) { |
16c74914 | 2600 | bool unexpected = false; |
31cd5f63 | 2601 | JobResult result; |
16c74914 LP |
2602 | |
2603 | assert(j); | |
2604 | ||
2605 | if (j->state == JOB_WAITING) | |
16c74914 LP |
2606 | /* So we reached a different state for this job. Let's see if we can run it now if it failed previously |
2607 | * due to EAGAIN. */ | |
2608 | job_add_to_run_queue(j); | |
2609 | ||
2610 | /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and | |
2611 | * hence needs to invalidate jobs. */ | |
2612 | ||
2613 | switch (j->type) { | |
2614 | ||
2615 | case JOB_START: | |
2616 | case JOB_VERIFY_ACTIVE: | |
2617 | ||
2618 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
2619 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2620 | else if (j->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
2621 | unexpected = true; | |
2622 | ||
31cd5f63 AZ |
2623 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
2624 | if (ns == UNIT_FAILED) | |
2625 | result = JOB_FAILED; | |
31cd5f63 AZ |
2626 | else |
2627 | result = JOB_DONE; | |
2628 | ||
2629 | job_finish_and_invalidate(j, result, true, false); | |
2630 | } | |
16c74914 LP |
2631 | } |
2632 | ||
2633 | break; | |
2634 | ||
2635 | case JOB_RELOAD: | |
2636 | case JOB_RELOAD_OR_START: | |
2637 | case JOB_TRY_RELOAD: | |
2638 | ||
2639 | if (j->state == JOB_RUNNING) { | |
2640 | if (ns == UNIT_ACTIVE) | |
96b09de5 | 2641 | job_finish_and_invalidate(j, reload_success ? JOB_DONE : JOB_FAILED, true, false); |
16c74914 LP |
2642 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { |
2643 | unexpected = true; | |
2644 | ||
2645 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2646 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2647 | } | |
2648 | } | |
2649 | ||
2650 | break; | |
2651 | ||
2652 | case JOB_STOP: | |
2653 | case JOB_RESTART: | |
2654 | case JOB_TRY_RESTART: | |
2655 | ||
2656 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2657 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2658 | else if (j->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
2659 | unexpected = true; | |
2660 | job_finish_and_invalidate(j, JOB_FAILED, true, false); | |
2661 | } | |
2662 | ||
2663 | break; | |
2664 | ||
2665 | default: | |
04499a70 | 2666 | assert_not_reached(); |
16c74914 LP |
2667 | } |
2668 | ||
2669 | return unexpected; | |
2670 | } | |
2671 | ||
96b09de5 | 2672 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
429926e9 | 2673 | const char *reason; |
8559b3b7 | 2674 | Manager *m; |
a096ed36 | 2675 | |
87f0e418 LP |
2676 | assert(u); |
2677 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2678 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2679 | |
8559b3b7 LP |
2680 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2681 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2682 | * remounted this function will be called too! */ | |
87f0e418 | 2683 | |
546ac4f0 MS |
2684 | m = u->manager; |
2685 | ||
3c4832ad LP |
2686 | /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in |
2687 | * the bus queue, so that any job change signal queued will force out the unit change signal first. */ | |
2688 | unit_add_to_dbus_queue(u); | |
2689 | ||
e30bbc90 AZ |
2690 | /* Update systemd-oomd on the property/state change */ |
2691 | if (os != ns) { | |
2692 | /* Always send an update if the unit is going into an inactive state so systemd-oomd knows to stop | |
2693 | * monitoring. | |
2694 | * Also send an update whenever the unit goes active; this is to handle a case where an override file | |
2695 | * sets one of the ManagedOOM*= properties to "kill", then later removes it. systemd-oomd needs to | |
2696 | * know to stop monitoring when the unit changes from "kill" -> "auto" on daemon-reload, but we don't | |
2697 | * have the information on the property. Thus, indiscriminately send an update. */ | |
f561e8c6 | 2698 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) || UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
e30bbc90 AZ |
2699 | (void) manager_varlink_send_managed_oom_update(u); |
2700 | } | |
2701 | ||
f755e3b7 | 2702 | /* Update timestamps for state changes */ |
2c289ea8 | 2703 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2704 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2705 | |
bdbf9951 | 2706 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2707 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2708 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2709 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2710 | |
2711 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2712 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2713 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2714 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2715 | } |
87f0e418 | 2716 | |
865cc19a | 2717 | /* Keep track of failed units */ |
8724defe | 2718 | (void) manager_update_failed_units(m, u, ns == UNIT_FAILED); |
f755e3b7 | 2719 | |
d3070fbd LP |
2720 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2721 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
ff68472a ZJS |
2722 | SET_FLAG(u->markers, |
2723 | (1u << UNIT_MARKER_NEEDS_RELOAD)|(1u << UNIT_MARKER_NEEDS_RESTART), | |
2724 | false); | |
efdb0237 | 2725 | unit_prune_cgroup(u); |
d3070fbd | 2726 | unit_unlink_state_files(u); |
ff68472a ZJS |
2727 | } else if (ns != os && ns == UNIT_RELOADING) |
2728 | SET_FLAG(u->markers, 1u << UNIT_MARKER_NEEDS_RELOAD, false); | |
fb385181 | 2729 | |
adefcf28 | 2730 | unit_update_on_console(u); |
7ed9f6cd | 2731 | |
2c289ea8 | 2732 | if (!MANAGER_IS_RELOADING(m)) { |
a1c7334b LP |
2733 | bool unexpected; |
2734 | ||
2735 | /* Let's propagate state changes to the job */ | |
2736 | if (u->job) | |
96b09de5 | 2737 | unexpected = unit_process_job(u->job, ns, reload_success); |
a1c7334b LP |
2738 | else |
2739 | unexpected = true; | |
f3bff0eb | 2740 | |
a1c7334b LP |
2741 | /* If this state change happened without being requested by a job, then let's retroactively start or |
2742 | * stop dependencies. We skip that step when deserializing, since we don't want to create any | |
2743 | * additional jobs just because something is already activated. */ | |
bdbf9951 LP |
2744 | |
2745 | if (unexpected) { | |
2746 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2747 | retroactively_start_dependencies(u); | |
2748 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2749 | retroactively_stop_dependencies(u); | |
2750 | } | |
5de9682c | 2751 | |
bdbf9951 | 2752 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2753 | log_unit_debug(u, "Unit entered failed state."); |
49b34f75 | 2754 | unit_start_on_failure(u, "OnFailure=", UNIT_ATOM_ON_FAILURE, u->on_failure_job_mode); |
cd6d0a45 | 2755 | } |
e537352b | 2756 | |
256f65d0 LP |
2757 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns) && !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
2758 | /* This unit just finished starting up */ | |
3b2775c5 | 2759 | |
6eb65e7c | 2760 | unit_emit_audit_start(u); |
546ac4f0 | 2761 | manager_send_unit_plymouth(m, u); |
256f65d0 | 2762 | } |
bdbf9951 | 2763 | |
256f65d0 | 2764 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && !UNIT_IS_INACTIVE_OR_FAILED(os)) { |
915b1d01 | 2765 | /* This unit just stopped/failed. */ |
256f65d0 | 2766 | |
6eb65e7c | 2767 | unit_emit_audit_stop(u, ns); |
915b1d01 | 2768 | unit_log_resources(u); |
cd6d0a45 | 2769 | } |
294446dc | 2770 | |
49b34f75 | 2771 | if (ns == UNIT_INACTIVE && !IN_SET(os, UNIT_FAILED, UNIT_INACTIVE, UNIT_MAINTENANCE)) |
294446dc | 2772 | unit_start_on_failure(u, "OnSuccess=", UNIT_ATOM_ON_SUCCESS, u->on_success_job_mode); |
f278026d LP |
2773 | } |
2774 | ||
31dc1ca3 LP |
2775 | manager_recheck_journal(m); |
2776 | manager_recheck_dbus(m); | |
e63ebf71 | 2777 | |
3ecaa09b | 2778 | unit_trigger_notify(u); |
3b2775c5 | 2779 | |
8724defe | 2780 | if (!MANAGER_IS_RELOADING(m)) { |
429926e9 TR |
2781 | if (os != UNIT_FAILED && ns == UNIT_FAILED) { |
2782 | reason = strjoina("unit ", u->id, " failed"); | |
36c4dc08 | 2783 | emergency_action(m, u->failure_action, 0, u->reboot_arg, unit_failure_action_exit_status(u), reason); |
429926e9 TR |
2784 | } else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) { |
2785 | reason = strjoina("unit ", u->id, " succeeded"); | |
36c4dc08 | 2786 | emergency_action(m, u->success_action, 0, u->reboot_arg, unit_success_action_exit_status(u), reason); |
429926e9 | 2787 | } |
ff502445 LP |
2788 | } |
2789 | ||
99e9af25 | 2790 | /* And now, add the unit or depending units to various queues that will act on the new situation if |
48008c1c | 2791 | * needed. These queues generally check for continuous state changes rather than events (like most of |
99e9af25 LP |
2792 | * the state propagation above), and do work deferred instead of instantly, since they typically |
2793 | * don't want to run during reloading, and usually involve checking combined state of multiple units | |
2794 | * at once. */ | |
2795 | ||
2796 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
2797 | /* Stop unneeded units and bound-by units regardless if going down was expected or not */ | |
2798 | check_unneeded_dependencies(u); | |
2799 | check_bound_by_dependencies(u); | |
2800 | ||
2801 | /* Maybe someone wants us to remain up? */ | |
2802 | unit_submit_to_start_when_upheld_queue(u); | |
2803 | ||
2804 | /* Maybe the unit should be GC'ed now? */ | |
2805 | unit_add_to_gc_queue(u); | |
6ac62d61 LP |
2806 | |
2807 | /* Maybe we can release some resources now? */ | |
2808 | unit_submit_to_release_resources_queue(u); | |
99e9af25 LP |
2809 | } |
2810 | ||
2811 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
2812 | /* Start uphold units regardless if going up was expected or not */ | |
2813 | check_uphold_dependencies(u); | |
2814 | ||
2815 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ | |
2816 | unit_submit_to_stop_when_unneeded_queue(u); | |
2817 | ||
2818 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens | |
2819 | * when something BindsTo= to a Type=oneshot unit, as these units go directly from starting to | |
2820 | * inactive, without ever entering started.) */ | |
2821 | unit_submit_to_stop_when_bound_queue(u); | |
2822 | } | |
87f0e418 LP |
2823 | } |
2824 | ||
495e75ed LP |
2825 | int unit_watch_pidref(Unit *u, PidRef *pid, bool exclusive) { |
2826 | _cleanup_(pidref_freep) PidRef *pid_dup = NULL; | |
62a76913 | 2827 | int r; |
a911bb9a | 2828 | |
495e75ed | 2829 | /* Adds a specific PID to the set of PIDs this unit watches. */ |
87f0e418 | 2830 | |
495e75ed LP |
2831 | assert(u); |
2832 | assert(pidref_is_set(pid)); | |
5ba6985b | 2833 | |
f75f613d FB |
2834 | /* Caller might be sure that this PID belongs to this unit only. Let's take this |
2835 | * opportunity to remove any stalled references to this PID as they can be created | |
2836 | * easily (when watching a process which is not our direct child). */ | |
2837 | if (exclusive) | |
495e75ed LP |
2838 | manager_unwatch_pidref(u->manager, pid); |
2839 | ||
2840 | if (set_contains(u->pids, pid)) /* early exit if already being watched */ | |
2841 | return 0; | |
f75f613d | 2842 | |
495e75ed | 2843 | r = pidref_dup(pid, &pid_dup); |
5ba6985b LP |
2844 | if (r < 0) |
2845 | return r; | |
2846 | ||
495e75ed LP |
2847 | /* First, insert into the set of PIDs maintained by the unit */ |
2848 | r = set_ensure_put(&u->pids, &pidref_hash_ops, pid_dup); | |
a911bb9a LP |
2849 | if (r < 0) |
2850 | return r; | |
2851 | ||
495e75ed | 2852 | pid = TAKE_PTR(pid_dup); /* continue with our copy now that we have installed it properly in our set */ |
05e343b7 | 2853 | |
495e75ed LP |
2854 | /* Second, insert it into the simple global table, see if that works */ |
2855 | r = hashmap_ensure_put(&u->manager->watch_pids, &pidref_hash_ops, pid, u); | |
2856 | if (r != -EEXIST) | |
2857 | return r; | |
a911bb9a | 2858 | |
495e75ed LP |
2859 | /* OK, the key is already assigned to a different unit. That's fine, then add us via the second |
2860 | * hashmap that points to an array. */ | |
a911bb9a | 2861 | |
495e75ed LP |
2862 | PidRef *old_pid = NULL; |
2863 | Unit **array = hashmap_get2(u->manager->watch_pids_more, pid, (void**) &old_pid); | |
62a76913 | 2864 | |
495e75ed LP |
2865 | /* Count entries in array */ |
2866 | size_t n = 0; | |
2867 | for (; array && array[n]; n++) | |
2868 | ; | |
62a76913 | 2869 | |
495e75ed LP |
2870 | /* Allocate a new array */ |
2871 | _cleanup_free_ Unit **new_array = new(Unit*, n + 2); | |
2872 | if (!new_array) | |
2873 | return -ENOMEM; | |
62a76913 | 2874 | |
495e75ed LP |
2875 | /* Append us to the end */ |
2876 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2877 | new_array[n] = u; | |
2878 | new_array[n+1] = NULL; | |
62a76913 | 2879 | |
495e75ed LP |
2880 | /* Make sure the hashmap is allocated */ |
2881 | r = hashmap_ensure_allocated(&u->manager->watch_pids_more, &pidref_hash_ops); | |
2882 | if (r < 0) | |
62a76913 LP |
2883 | return r; |
2884 | ||
495e75ed LP |
2885 | /* Add or replace the old array */ |
2886 | r = hashmap_replace(u->manager->watch_pids_more, old_pid ?: pid, new_array); | |
62a76913 LP |
2887 | if (r < 0) |
2888 | return r; | |
2889 | ||
495e75ed LP |
2890 | TAKE_PTR(new_array); /* Now part of the hash table */ |
2891 | free(array); /* Which means we can now delete the old version */ | |
62a76913 | 2892 | return 0; |
87f0e418 LP |
2893 | } |
2894 | ||
495e75ed LP |
2895 | int unit_watch_pid(Unit *u, pid_t pid, bool exclusive) { |
2896 | _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL; | |
2897 | int r; | |
62a76913 | 2898 | |
87f0e418 | 2899 | assert(u); |
62a76913 LP |
2900 | assert(pid_is_valid(pid)); |
2901 | ||
495e75ed LP |
2902 | r = pidref_set_pid(&pidref, pid); |
2903 | if (r < 0) | |
2904 | return r; | |
62a76913 | 2905 | |
495e75ed LP |
2906 | return unit_watch_pidref(u, &pidref, exclusive); |
2907 | } | |
12375b95 | 2908 | |
495e75ed LP |
2909 | void unit_unwatch_pidref(Unit *u, PidRef *pid) { |
2910 | assert(u); | |
2911 | assert(pidref_is_set(pid)); | |
2912 | ||
2913 | /* Remove from the set we maintain for this unit. (And destroy the returned pid eventually) */ | |
2914 | _cleanup_(pidref_freep) PidRef *pid1 = set_remove(u->pids, pid); | |
2915 | if (!pid1) | |
2916 | return; /* Early exit if this PID was never watched by us */ | |
2917 | ||
2918 | /* First let's drop the unit from the simple hash table, if it is included there */ | |
2919 | PidRef *pid2 = NULL; | |
2920 | Unit *uu = hashmap_get2(u->manager->watch_pids, pid, (void**) &pid2); | |
2921 | ||
2922 | /* Quick validation: iff we are in the watch_pids table then the PidRef object must be the same as in our local pids set */ | |
2923 | assert((uu == u) == (pid1 == pid2)); | |
2924 | ||
2925 | if (uu == u) | |
2926 | /* OK, we are in the first table. Let's remove it there then, and we are done already. */ | |
2927 | assert_se(hashmap_remove_value(u->manager->watch_pids, pid2, uu) == uu); | |
2928 | else { | |
2929 | /* We weren't in the first table, then let's consult the 2nd table that points to an array */ | |
2930 | PidRef *pid3 = NULL; | |
2931 | Unit **array = hashmap_get2(u->manager->watch_pids_more, pid, (void**) &pid3); | |
2932 | ||
2933 | /* Let's iterate through the array, dropping our own entry */ | |
2934 | size_t m = 0, n = 0; | |
2935 | for (; array && array[n]; n++) | |
62a76913 LP |
2936 | if (array[n] != u) |
2937 | array[m++] = array[n]; | |
495e75ed LP |
2938 | if (n == m) |
2939 | return; /* Not there */ | |
2940 | ||
2941 | array[m] = NULL; /* set trailing NULL marker on the new end */ | |
62a76913 LP |
2942 | |
2943 | if (m == 0) { | |
2944 | /* The array is now empty, remove the entire entry */ | |
495e75ed | 2945 | assert_se(hashmap_remove_value(u->manager->watch_pids_more, pid3, array) == array); |
62a76913 | 2946 | free(array); |
495e75ed LP |
2947 | } else { |
2948 | /* The array is not empty, but let's make sure the entry is not keyed by the PidRef | |
2949 | * we will delete, but by the PidRef object of the Unit that is now first in the | |
2950 | * array. */ | |
2951 | ||
2952 | PidRef *new_pid3 = ASSERT_PTR(set_get(array[0]->pids, pid)); | |
2953 | assert_se(hashmap_replace(u->manager->watch_pids_more, new_pid3, array) >= 0); | |
62a76913 LP |
2954 | } |
2955 | } | |
495e75ed | 2956 | } |
87f0e418 | 2957 | |
495e75ed LP |
2958 | void unit_unwatch_pid(Unit *u, pid_t pid) { |
2959 | return unit_unwatch_pidref(u, &PIDREF_MAKE_FROM_PID(pid)); | |
a911bb9a LP |
2960 | } |
2961 | ||
bd44e61b LP |
2962 | void unit_unwatch_all_pids(Unit *u) { |
2963 | assert(u); | |
2964 | ||
2965 | while (!set_isempty(u->pids)) | |
495e75ed | 2966 | unit_unwatch_pidref(u, set_first(u->pids)); |
bd44e61b | 2967 | |
efdb0237 | 2968 | u->pids = set_free(u->pids); |
a911bb9a LP |
2969 | } |
2970 | ||
50be4f4a | 2971 | static void unit_tidy_watch_pids(Unit *u) { |
495e75ed | 2972 | PidRef *except1, *except2, *e; |
a911bb9a LP |
2973 | |
2974 | assert(u); | |
2975 | ||
2976 | /* Cleans dead PIDs from our list */ | |
2977 | ||
50be4f4a LP |
2978 | except1 = unit_main_pid(u); |
2979 | except2 = unit_control_pid(u); | |
2980 | ||
90e74a66 | 2981 | SET_FOREACH(e, u->pids) { |
495e75ed | 2982 | if (pidref_equal(except1, e) || pidref_equal(except2, e)) |
a911bb9a LP |
2983 | continue; |
2984 | ||
4d9f092b | 2985 | if (pidref_is_unwaited(e) <= 0) |
495e75ed | 2986 | unit_unwatch_pidref(u, e); |
a911bb9a | 2987 | } |
87f0e418 LP |
2988 | } |
2989 | ||
50be4f4a | 2990 | static int on_rewatch_pids_event(sd_event_source *s, void *userdata) { |
99534007 | 2991 | Unit *u = ASSERT_PTR(userdata); |
50be4f4a LP |
2992 | |
2993 | assert(s); | |
50be4f4a LP |
2994 | |
2995 | unit_tidy_watch_pids(u); | |
2996 | unit_watch_all_pids(u); | |
2997 | ||
2998 | /* If the PID set is empty now, then let's finish this off. */ | |
2999 | unit_synthesize_cgroup_empty_event(u); | |
3000 | ||
3001 | return 0; | |
3002 | } | |
3003 | ||
3004 | int unit_enqueue_rewatch_pids(Unit *u) { | |
3005 | int r; | |
3006 | ||
3007 | assert(u); | |
3008 | ||
3009 | if (!u->cgroup_path) | |
3010 | return -ENOENT; | |
3011 | ||
3012 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
3013 | if (r < 0) | |
3014 | return r; | |
3015 | if (r > 0) /* On unified we can use proper notifications */ | |
3016 | return 0; | |
3017 | ||
3018 | /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new | |
3019 | * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it | |
3020 | * involves issuing kill(pid, 0) on all processes we watch. */ | |
3021 | ||
3022 | if (!u->rewatch_pids_event_source) { | |
3023 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
3024 | ||
3025 | r = sd_event_add_defer(u->manager->event, &s, on_rewatch_pids_event, u); | |
3026 | if (r < 0) | |
3027 | return log_error_errno(r, "Failed to allocate event source for tidying watched PIDs: %m"); | |
3028 | ||
3029 | r = sd_event_source_set_priority(s, SD_EVENT_PRIORITY_IDLE); | |
3030 | if (r < 0) | |
28b77ab2 | 3031 | return log_error_errno(r, "Failed to adjust priority of event source for tidying watched PIDs: %m"); |
50be4f4a LP |
3032 | |
3033 | (void) sd_event_source_set_description(s, "tidy-watch-pids"); | |
3034 | ||
3035 | u->rewatch_pids_event_source = TAKE_PTR(s); | |
3036 | } | |
3037 | ||
3038 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_ONESHOT); | |
3039 | if (r < 0) | |
3040 | return log_error_errno(r, "Failed to enable event source for tidying watched PIDs: %m"); | |
3041 | ||
3042 | return 0; | |
3043 | } | |
3044 | ||
3045 | void unit_dequeue_rewatch_pids(Unit *u) { | |
3046 | int r; | |
3047 | assert(u); | |
3048 | ||
3049 | if (!u->rewatch_pids_event_source) | |
3050 | return; | |
3051 | ||
3052 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_OFF); | |
3053 | if (r < 0) | |
3054 | log_warning_errno(r, "Failed to disable event source for tidying watched PIDs, ignoring: %m"); | |
3055 | ||
5dcadb4c | 3056 | u->rewatch_pids_event_source = sd_event_source_disable_unref(u->rewatch_pids_event_source); |
50be4f4a LP |
3057 | } |
3058 | ||
87f0e418 LP |
3059 | bool unit_job_is_applicable(Unit *u, JobType j) { |
3060 | assert(u); | |
3061 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
3062 | ||
3063 | switch (j) { | |
3064 | ||
3065 | case JOB_VERIFY_ACTIVE: | |
3066 | case JOB_START: | |
e0209d83 | 3067 | case JOB_NOP: |
f5869324 | 3068 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
86b52a39 | 3069 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueuing |
f5869324 | 3070 | * jobs for it. */ |
87f0e418 LP |
3071 | return true; |
3072 | ||
f5869324 LP |
3073 | case JOB_STOP: |
3074 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
86b52a39 | 3075 | * external events), hence it makes no sense to permit enqueuing such a request either. */ |
f5869324 LP |
3076 | return !u->perpetual; |
3077 | ||
87f0e418 LP |
3078 | case JOB_RESTART: |
3079 | case JOB_TRY_RESTART: | |
f5869324 | 3080 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
3081 | |
3082 | case JOB_RELOAD: | |
3282591d | 3083 | case JOB_TRY_RELOAD: |
87f0e418 LP |
3084 | return unit_can_reload(u); |
3085 | ||
3086 | case JOB_RELOAD_OR_START: | |
3087 | return unit_can_reload(u) && unit_can_start(u); | |
3088 | ||
3089 | default: | |
04499a70 | 3090 | assert_not_reached(); |
87f0e418 LP |
3091 | } |
3092 | } | |
3093 | ||
83110824 YW |
3094 | static Hashmap *unit_get_dependency_hashmap_per_type(Unit *u, UnitDependency d) { |
3095 | Hashmap *deps; | |
3096 | ||
3097 | assert(u); | |
3098 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
3099 | ||
3100 | deps = hashmap_get(u->dependencies, UNIT_DEPENDENCY_TO_PTR(d)); | |
3101 | if (!deps) { | |
3102 | _cleanup_hashmap_free_ Hashmap *h = NULL; | |
3103 | ||
3104 | h = hashmap_new(NULL); | |
3105 | if (!h) | |
3106 | return NULL; | |
3107 | ||
3108 | if (hashmap_ensure_put(&u->dependencies, NULL, UNIT_DEPENDENCY_TO_PTR(d), h) < 0) | |
3109 | return NULL; | |
3110 | ||
3111 | deps = TAKE_PTR(h); | |
3112 | } | |
3113 | ||
3114 | return deps; | |
3115 | } | |
3116 | ||
3117 | typedef enum NotifyDependencyFlags { | |
3118 | NOTIFY_DEPENDENCY_UPDATE_FROM = 1 << 0, | |
3119 | NOTIFY_DEPENDENCY_UPDATE_TO = 1 << 1, | |
3120 | } NotifyDependencyFlags; | |
3121 | ||
3122 | static int unit_add_dependency_impl( | |
eef85c4a LP |
3123 | Unit *u, |
3124 | UnitDependency d, | |
3125 | Unit *other, | |
eef85c4a | 3126 | UnitDependencyMask mask) { |
87f0e418 LP |
3127 | |
3128 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
fb138166 ZJS |
3129 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, |
3130 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, | |
3131 | [UNIT_WANTS] = UNIT_WANTED_BY, | |
3132 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, | |
3133 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, | |
3134 | [UNIT_UPHOLDS] = UNIT_UPHELD_BY, | |
3135 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, | |
3136 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, | |
3137 | [UNIT_WANTED_BY] = UNIT_WANTS, | |
3138 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, | |
3139 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, | |
3140 | [UNIT_UPHELD_BY] = UNIT_UPHOLDS, | |
3141 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, | |
3142 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
3143 | [UNIT_BEFORE] = UNIT_AFTER, | |
3144 | [UNIT_AFTER] = UNIT_BEFORE, | |
3145 | [UNIT_ON_SUCCESS] = UNIT_ON_SUCCESS_OF, | |
3146 | [UNIT_ON_SUCCESS_OF] = UNIT_ON_SUCCESS, | |
3147 | [UNIT_ON_FAILURE] = UNIT_ON_FAILURE_OF, | |
3148 | [UNIT_ON_FAILURE_OF] = UNIT_ON_FAILURE, | |
3149 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
3150 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, | |
3151 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, | |
85e9a101 | 3152 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
fb138166 ZJS |
3153 | [UNIT_PROPAGATES_STOP_TO] = UNIT_STOP_PROPAGATED_FROM, |
3154 | [UNIT_STOP_PROPAGATED_FROM] = UNIT_PROPAGATES_STOP_TO, | |
3155 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, /* symmetric! 👓 */ | |
3156 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, | |
3157 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, | |
3158 | [UNIT_IN_SLICE] = UNIT_SLICE_OF, | |
3159 | [UNIT_SLICE_OF] = UNIT_IN_SLICE, | |
87f0e418 | 3160 | }; |
83110824 YW |
3161 | |
3162 | Hashmap *u_deps, *other_deps; | |
3163 | UnitDependencyInfo u_info, u_info_old, other_info, other_info_old; | |
3164 | NotifyDependencyFlags flags = 0; | |
3165 | int r; | |
3166 | ||
3167 | assert(u); | |
3168 | assert(other); | |
3169 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
3170 | assert(inverse_table[d] >= 0 && inverse_table[d] < _UNIT_DEPENDENCY_MAX); | |
3171 | assert(mask > 0 && mask < _UNIT_DEPENDENCY_MASK_FULL); | |
3172 | ||
3173 | /* Ensure the following two hashmaps for each unit exist: | |
3174 | * - the top-level dependency hashmap that maps UnitDependency → Hashmap(Unit* → UnitDependencyInfo), | |
3175 | * - the inner hashmap, that maps Unit* → UnitDependencyInfo, for the specified dependency type. */ | |
3176 | u_deps = unit_get_dependency_hashmap_per_type(u, d); | |
3177 | if (!u_deps) | |
3178 | return -ENOMEM; | |
3179 | ||
3180 | other_deps = unit_get_dependency_hashmap_per_type(other, inverse_table[d]); | |
3181 | if (!other_deps) | |
3182 | return -ENOMEM; | |
3183 | ||
3184 | /* Save the original dependency info. */ | |
3185 | u_info.data = u_info_old.data = hashmap_get(u_deps, other); | |
3186 | other_info.data = other_info_old.data = hashmap_get(other_deps, u); | |
3187 | ||
3188 | /* Update dependency info. */ | |
3189 | u_info.origin_mask |= mask; | |
3190 | other_info.destination_mask |= mask; | |
3191 | ||
3192 | /* Save updated dependency info. */ | |
3193 | if (u_info.data != u_info_old.data) { | |
3194 | r = hashmap_replace(u_deps, other, u_info.data); | |
3195 | if (r < 0) | |
3196 | return r; | |
3197 | ||
3198 | flags = NOTIFY_DEPENDENCY_UPDATE_FROM; | |
3199 | } | |
3200 | ||
3201 | if (other_info.data != other_info_old.data) { | |
3202 | r = hashmap_replace(other_deps, u, other_info.data); | |
3203 | if (r < 0) { | |
3204 | if (u_info.data != u_info_old.data) { | |
3205 | /* Restore the old dependency. */ | |
3206 | if (u_info_old.data) | |
3207 | (void) hashmap_update(u_deps, other, u_info_old.data); | |
3208 | else | |
3209 | hashmap_remove(u_deps, other); | |
3210 | } | |
3211 | return r; | |
3212 | } | |
3213 | ||
3214 | flags |= NOTIFY_DEPENDENCY_UPDATE_TO; | |
3215 | } | |
3216 | ||
3217 | return flags; | |
3218 | } | |
3219 | ||
3220 | int unit_add_dependency( | |
3221 | Unit *u, | |
3222 | UnitDependency d, | |
3223 | Unit *other, | |
3224 | bool add_reference, | |
3225 | UnitDependencyMask mask) { | |
3226 | ||
15ed3c3a | 3227 | UnitDependencyAtom a; |
eef85c4a | 3228 | int r; |
15ed3c3a LP |
3229 | |
3230 | /* Helper to know whether sending a notification is necessary or not: if the dependency is already | |
3231 | * there, no need to notify! */ | |
83110824 | 3232 | NotifyDependencyFlags notify_flags; |
87f0e418 LP |
3233 | |
3234 | assert(u); | |
3235 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
3236 | assert(other); |
3237 | ||
9f151f29 LP |
3238 | u = unit_follow_merge(u); |
3239 | other = unit_follow_merge(other); | |
15ed3c3a LP |
3240 | a = unit_dependency_to_atom(d); |
3241 | assert(a >= 0); | |
9f151f29 | 3242 | |
15ed3c3a | 3243 | /* We won't allow dependencies on ourselves. We will not consider them an error however. */ |
d1fab3fe | 3244 | if (u == other) { |
ed991163 YW |
3245 | if (unit_should_warn_about_dependency(d)) |
3246 | log_unit_warning(u, "Dependency %s=%s is dropped.", | |
3247 | unit_dependency_to_string(d), u->id); | |
87f0e418 | 3248 | return 0; |
d1fab3fe | 3249 | } |
87f0e418 | 3250 | |
f14d6810 MG |
3251 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3252 | return 0; | |
3253 | ||
15ed3c3a LP |
3254 | /* Note that ordering a device unit after a unit is permitted since it allows to start its job |
3255 | * running timeout at a specific time. */ | |
3256 | if (FLAGS_SET(a, UNIT_ATOM_BEFORE) && other->type == UNIT_DEVICE) { | |
b862c257 | 3257 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
c80a9a33 LP |
3258 | return 0; |
3259 | } | |
3260 | ||
15ed3c3a | 3261 | if (FLAGS_SET(a, UNIT_ATOM_ON_FAILURE) && !UNIT_VTABLE(u)->can_fail) { |
c80a9a33 LP |
3262 | log_unit_warning(u, "Requested dependency OnFailure=%s ignored (%s units cannot fail).", other->id, unit_type_to_string(u->type)); |
3263 | return 0; | |
3264 | } | |
3265 | ||
15ed3c3a | 3266 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERS) && !UNIT_VTABLE(u)->can_trigger) |
c80a9a33 LP |
3267 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3268 | "Requested dependency Triggers=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(u->type)); | |
15ed3c3a | 3269 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERED_BY) && !UNIT_VTABLE(other)->can_trigger) |
c80a9a33 LP |
3270 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3271 | "Requested dependency TriggeredBy=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(other->type)); | |
3272 | ||
d219a2b0 LP |
3273 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && other->type != UNIT_SLICE) |
3274 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3275 | "Requested dependency Slice=%s refused (%s is not a slice unit).", other->id, other->id); | |
3276 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && u->type != UNIT_SLICE) | |
3277 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3278 | "Requested dependency SliceOf=%s refused (%s is not a slice unit).", other->id, u->id); | |
3279 | ||
3280 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && !UNIT_HAS_CGROUP_CONTEXT(u)) | |
3281 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3282 | "Requested dependency Slice=%s refused (%s is not a cgroup unit).", other->id, u->id); | |
3283 | ||
3284 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && !UNIT_HAS_CGROUP_CONTEXT(other)) | |
3285 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3286 | "Requested dependency SliceOf=%s refused (%s is not a cgroup unit).", other->id, other->id); | |
3287 | ||
83110824 | 3288 | r = unit_add_dependency_impl(u, d, other, mask); |
613b411c | 3289 | if (r < 0) |
87f0e418 | 3290 | return r; |
83110824 | 3291 | notify_flags = r; |
613b411c LP |
3292 | |
3293 | if (add_reference) { | |
83110824 | 3294 | r = unit_add_dependency_impl(u, UNIT_REFERENCES, other, mask); |
613b411c | 3295 | if (r < 0) |
701cc384 | 3296 | return r; |
83110824 | 3297 | notify_flags |= r; |
613b411c | 3298 | } |
87f0e418 | 3299 | |
83110824 | 3300 | if (FLAGS_SET(notify_flags, NOTIFY_DEPENDENCY_UPDATE_FROM)) |
5177cb0a | 3301 | unit_add_to_dbus_queue(u); |
83110824 | 3302 | if (FLAGS_SET(notify_flags, NOTIFY_DEPENDENCY_UPDATE_TO)) |
ac17080c | 3303 | unit_add_to_dbus_queue(other); |
15ed3c3a | 3304 | |
83110824 | 3305 | return notify_flags != 0; |
87f0e418 | 3306 | } |
0301abf4 | 3307 | |
eef85c4a | 3308 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
5ee8e988 | 3309 | int r = 0, s = 0; |
2c966c03 LP |
3310 | |
3311 | assert(u); | |
5ee8e988 | 3312 | assert(d >= 0 || e >= 0); |
2c966c03 | 3313 | |
5ee8e988 LB |
3314 | if (d >= 0) { |
3315 | r = unit_add_dependency(u, d, other, add_reference, mask); | |
3316 | if (r < 0) | |
3317 | return r; | |
3318 | } | |
2c966c03 | 3319 | |
5ee8e988 LB |
3320 | if (e >= 0) { |
3321 | s = unit_add_dependency(u, e, other, add_reference, mask); | |
3322 | if (s < 0) | |
3323 | return s; | |
3324 | } | |
a8c5a4c6 YW |
3325 | |
3326 | return r > 0 || s > 0; | |
2c966c03 LP |
3327 | } |
3328 | ||
23e8c796 | 3329 | static int resolve_template(Unit *u, const char *name, char **buf, const char **ret) { |
7410616c | 3330 | int r; |
9e2f7c11 LP |
3331 | |
3332 | assert(u); | |
23e8c796 | 3333 | assert(name); |
7410616c LP |
3334 | assert(buf); |
3335 | assert(ret); | |
9e2f7c11 | 3336 | |
7410616c LP |
3337 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
3338 | *buf = NULL; | |
3339 | *ret = name; | |
3340 | return 0; | |
9e2f7c11 LP |
3341 | } |
3342 | ||
ac155bb8 | 3343 | if (u->instance) |
7410616c | 3344 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 3345 | else { |
ae018d9b | 3346 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 3347 | |
7410616c LP |
3348 | r = unit_name_to_prefix(u->id, &i); |
3349 | if (r < 0) | |
3350 | return r; | |
9e2f7c11 | 3351 | |
7410616c | 3352 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 3353 | } |
7410616c LP |
3354 | if (r < 0) |
3355 | return r; | |
9e2f7c11 | 3356 | |
7410616c LP |
3357 | *ret = *buf; |
3358 | return 0; | |
9e2f7c11 LP |
3359 | } |
3360 | ||
35d8c19a | 3361 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3362 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
3363 | Unit *other; |
3364 | int r; | |
3365 | ||
9e2f7c11 | 3366 | assert(u); |
35d8c19a | 3367 | assert(name); |
09b6b09f | 3368 | |
23e8c796 | 3369 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3370 | if (r < 0) |
3371 | return r; | |
09b6b09f | 3372 | |
f14d6810 MG |
3373 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3374 | return 0; | |
3375 | ||
35d8c19a | 3376 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
8afbb8e1 LP |
3377 | if (r < 0) |
3378 | return r; | |
9e2f7c11 | 3379 | |
eef85c4a | 3380 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
3381 | } |
3382 | ||
5a724170 | 3383 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3384 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
3385 | Unit *other; |
3386 | int r; | |
2c966c03 LP |
3387 | |
3388 | assert(u); | |
5a724170 | 3389 | assert(name); |
2c966c03 | 3390 | |
23e8c796 | 3391 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3392 | if (r < 0) |
3393 | return r; | |
2c966c03 | 3394 | |
f14d6810 MG |
3395 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3396 | return 0; | |
3397 | ||
5a724170 | 3398 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
3f3cc397 | 3399 | if (r < 0) |
68eda4bd | 3400 | return r; |
2c966c03 | 3401 | |
eef85c4a | 3402 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
3403 | } |
3404 | ||
0301abf4 | 3405 | int set_unit_path(const char *p) { |
0301abf4 | 3406 | /* This is mostly for debug purposes */ |
7c248223 | 3407 | return RET_NERRNO(setenv("SYSTEMD_UNIT_PATH", p, 1)); |
0301abf4 | 3408 | } |
88066b3a | 3409 | |
ea430986 | 3410 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
3411 | assert(u); |
3412 | ||
ac155bb8 | 3413 | if (!u->id) |
04ade7d2 LP |
3414 | return NULL; |
3415 | ||
48899192 | 3416 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
3417 | } |
3418 | ||
4b58153d LP |
3419 | char *unit_dbus_path_invocation_id(Unit *u) { |
3420 | assert(u); | |
3421 | ||
3422 | if (sd_id128_is_null(u->invocation_id)) | |
3423 | return NULL; | |
3424 | ||
3425 | return unit_dbus_path_from_name(u->invocation_id_string); | |
3426 | } | |
3427 | ||
2d3b784d | 3428 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { |
db868d45 ZJS |
3429 | int r; |
3430 | ||
3431 | assert(u); | |
3432 | ||
3433 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
3434 | ||
3435 | if (sd_id128_equal(u->invocation_id, id)) | |
3436 | return 0; | |
3437 | ||
3438 | if (!sd_id128_is_null(u->invocation_id)) | |
3439 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3440 | ||
3441 | if (sd_id128_is_null(id)) { | |
3442 | r = 0; | |
3443 | goto reset; | |
3444 | } | |
3445 | ||
3446 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
3447 | if (r < 0) | |
3448 | goto reset; | |
3449 | ||
3450 | u->invocation_id = id; | |
3451 | sd_id128_to_string(id, u->invocation_id_string); | |
3452 | ||
3453 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3454 | if (r < 0) | |
3455 | goto reset; | |
3456 | ||
3457 | return 0; | |
3458 | ||
3459 | reset: | |
3460 | u->invocation_id = SD_ID128_NULL; | |
3461 | u->invocation_id_string[0] = 0; | |
3462 | return r; | |
3463 | } | |
3464 | ||
899acf5c | 3465 | int unit_set_slice(Unit *u, Unit *slice) { |
d219a2b0 LP |
3466 | int r; |
3467 | ||
d79200e2 LP |
3468 | assert(u); |
3469 | assert(slice); | |
3470 | ||
d219a2b0 LP |
3471 | /* Sets the unit slice if it has not been set before. Is extra careful, to only allow this for units |
3472 | * that actually have a cgroup context. Also, we don't allow to set this for slices (since the parent | |
3473 | * slice is derived from the name). Make sure the unit we set is actually a slice. */ | |
d79200e2 LP |
3474 | |
3475 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3476 | return -EOPNOTSUPP; | |
3477 | ||
3478 | if (u->type == UNIT_SLICE) | |
3479 | return -EINVAL; | |
3480 | ||
102ef982 LP |
3481 | if (unit_active_state(u) != UNIT_INACTIVE) |
3482 | return -EBUSY; | |
3483 | ||
d79200e2 LP |
3484 | if (slice->type != UNIT_SLICE) |
3485 | return -EINVAL; | |
3486 | ||
efdb0237 LP |
3487 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
3488 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
3489 | return -EPERM; | |
3490 | ||
12f64221 | 3491 | if (UNIT_GET_SLICE(u) == slice) |
d79200e2 LP |
3492 | return 0; |
3493 | ||
99e66921 | 3494 | /* Disallow slice changes if @u is already bound to cgroups */ |
12f64221 | 3495 | if (UNIT_GET_SLICE(u) && u->cgroup_realized) |
d79200e2 LP |
3496 | return -EBUSY; |
3497 | ||
899acf5c AZ |
3498 | /* Remove any slices assigned prior; we should only have one UNIT_IN_SLICE dependency */ |
3499 | if (UNIT_GET_SLICE(u)) | |
3500 | unit_remove_dependencies(u, UNIT_DEPENDENCY_SLICE_PROPERTY); | |
3501 | ||
3502 | r = unit_add_dependency(u, UNIT_IN_SLICE, slice, true, UNIT_DEPENDENCY_SLICE_PROPERTY); | |
d219a2b0 LP |
3503 | if (r < 0) |
3504 | return r; | |
3505 | ||
d79200e2 LP |
3506 | return 1; |
3507 | } | |
3508 | ||
3509 | int unit_set_default_slice(Unit *u) { | |
a8833944 | 3510 | const char *slice_name; |
a016b922 LP |
3511 | Unit *slice; |
3512 | int r; | |
3513 | ||
3514 | assert(u); | |
3515 | ||
f14d6810 MG |
3516 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3517 | return 0; | |
3518 | ||
12f64221 | 3519 | if (UNIT_GET_SLICE(u)) |
a016b922 LP |
3520 | return 0; |
3521 | ||
a8833944 LP |
3522 | if (u->instance) { |
3523 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 3524 | |
a8833944 LP |
3525 | /* Implicitly place all instantiated units in their |
3526 | * own per-template slice */ | |
3527 | ||
7410616c LP |
3528 | r = unit_name_to_prefix(u->id, &prefix); |
3529 | if (r < 0) | |
3530 | return r; | |
a8833944 LP |
3531 | |
3532 | /* The prefix is already escaped, but it might include | |
3533 | * "-" which has a special meaning for slice units, | |
3534 | * hence escape it here extra. */ | |
7410616c | 3535 | escaped = unit_name_escape(prefix); |
a8833944 LP |
3536 | if (!escaped) |
3537 | return -ENOMEM; | |
3538 | ||
463d0d15 | 3539 | if (MANAGER_IS_SYSTEM(u->manager)) |
00e7b3c8 | 3540 | slice_name = strjoina("system-", escaped, ".slice"); |
a8833944 | 3541 | else |
7f3b86a4 | 3542 | slice_name = strjoina("app-", escaped, ".slice"); |
5ee24fa0 ZJS |
3543 | |
3544 | } else if (unit_is_extrinsic(u)) | |
3545 | /* Keep all extrinsic units (e.g. perpetual units and swap and mount units in user mode) in | |
3546 | * the root slice. They don't really belong in one of the subslices. */ | |
3547 | slice_name = SPECIAL_ROOT_SLICE; | |
3548 | ||
3549 | else if (MANAGER_IS_SYSTEM(u->manager)) | |
3550 | slice_name = SPECIAL_SYSTEM_SLICE; | |
3551 | else | |
3552 | slice_name = SPECIAL_APP_SLICE; | |
a8833944 LP |
3553 | |
3554 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
3555 | if (r < 0) |
3556 | return r; | |
3557 | ||
899acf5c | 3558 | return unit_set_slice(u, slice); |
a016b922 LP |
3559 | } |
3560 | ||
9444b1f2 | 3561 | const char *unit_slice_name(Unit *u) { |
12f64221 | 3562 | Unit *slice; |
9444b1f2 LP |
3563 | assert(u); |
3564 | ||
12f64221 LP |
3565 | slice = UNIT_GET_SLICE(u); |
3566 | if (!slice) | |
9444b1f2 LP |
3567 | return NULL; |
3568 | ||
12f64221 | 3569 | return slice->id; |
9444b1f2 LP |
3570 | } |
3571 | ||
f6ff8c29 | 3572 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 3573 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
3574 | int r; |
3575 | ||
3576 | assert(u); | |
3577 | assert(type); | |
3578 | assert(_found); | |
3579 | ||
7410616c LP |
3580 | r = unit_name_change_suffix(u->id, type, &t); |
3581 | if (r < 0) | |
3582 | return r; | |
3583 | if (unit_has_name(u, t)) | |
3584 | return -EINVAL; | |
f6ff8c29 | 3585 | |
ac155bb8 | 3586 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3587 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3588 | return r; |
3589 | } | |
3590 | ||
bbc29086 | 3591 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
fc67a943 | 3592 | const char *new_owner; |
99534007 | 3593 | Unit *u = ASSERT_PTR(userdata); |
bbc29086 DM |
3594 | int r; |
3595 | ||
3596 | assert(message); | |
bbc29086 | 3597 | |
fc67a943 | 3598 | r = sd_bus_message_read(message, "sss", NULL, NULL, &new_owner); |
bbc29086 DM |
3599 | if (r < 0) { |
3600 | bus_log_parse_error(r); | |
3601 | return 0; | |
3602 | } | |
3603 | ||
3604 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3605 | UNIT_VTABLE(u)->bus_name_owner_change(u, empty_to_null(new_owner)); |
a5a8776a MJ |
3606 | |
3607 | return 0; | |
3608 | } | |
3609 | ||
3610 | static int get_name_owner_handler(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
3611 | const sd_bus_error *e; | |
3612 | const char *new_owner; | |
99534007 | 3613 | Unit *u = ASSERT_PTR(userdata); |
a5a8776a MJ |
3614 | int r; |
3615 | ||
3616 | assert(message); | |
a5a8776a MJ |
3617 | |
3618 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); | |
3619 | ||
a5a8776a | 3620 | e = sd_bus_message_get_error(message); |
a5a8776a | 3621 | if (e) { |
91053fc9 | 3622 | if (!sd_bus_error_has_name(e, SD_BUS_ERROR_NAME_HAS_NO_OWNER)) { |
33322185 YW |
3623 | r = sd_bus_error_get_errno(e); |
3624 | log_unit_error_errno(u, r, | |
3625 | "Unexpected error response from GetNameOwner(): %s", | |
3626 | bus_error_message(e, r)); | |
3627 | } | |
a5a8776a | 3628 | |
fc67a943 LP |
3629 | new_owner = NULL; |
3630 | } else { | |
3631 | r = sd_bus_message_read(message, "s", &new_owner); | |
3632 | if (r < 0) | |
3633 | return bus_log_parse_error(r); | |
a5a8776a | 3634 | |
fc67a943 LP |
3635 | assert(!isempty(new_owner)); |
3636 | } | |
a5a8776a MJ |
3637 | |
3638 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3639 | UNIT_VTABLE(u)->bus_name_owner_change(u, new_owner); |
bbc29086 DM |
3640 | |
3641 | return 0; | |
3642 | } | |
3643 | ||
9806e87d | 3644 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
8df433d7 | 3645 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
9806e87d | 3646 | const char *match; |
8df433d7 | 3647 | usec_t timeout_usec = 0; |
a5b07847 | 3648 | int r; |
bbc29086 | 3649 | |
9806e87d LP |
3650 | assert(u); |
3651 | assert(bus); | |
3652 | assert(name); | |
bbc29086 | 3653 | |
a5b07847 | 3654 | if (u->match_bus_slot || u->get_name_owner_slot) |
bbc29086 DM |
3655 | return -EBUSY; |
3656 | ||
8df433d7 | 3657 | /* NameOwnerChanged and GetNameOwner is used to detect when a service finished starting up. The dbus |
3658 | * call timeout shouldn't be earlier than that. If we couldn't get the start timeout, use the default | |
3659 | * value defined above. */ | |
3660 | if (UNIT_VTABLE(u)->get_timeout_start_usec) | |
3661 | timeout_usec = UNIT_VTABLE(u)->get_timeout_start_usec(u); | |
3662 | ||
9806e87d | 3663 | match = strjoina("type='signal'," |
81d62103 ZJS |
3664 | "sender='org.freedesktop.DBus'," |
3665 | "path='/org/freedesktop/DBus'," | |
3666 | "interface='org.freedesktop.DBus'," | |
3667 | "member='NameOwnerChanged'," | |
3668 | "arg0='", name, "'"); | |
bbc29086 | 3669 | |
8df433d7 | 3670 | r = bus_add_match_full( |
3671 | bus, | |
3672 | &u->match_bus_slot, | |
3673 | true, | |
3674 | match, | |
3675 | signal_name_owner_changed, | |
3676 | NULL, | |
3677 | u, | |
3678 | timeout_usec); | |
a5a8776a MJ |
3679 | if (r < 0) |
3680 | return r; | |
3681 | ||
8df433d7 | 3682 | r = sd_bus_message_new_method_call( |
a5b07847 | 3683 | bus, |
8df433d7 | 3684 | &m, |
a5b07847 LP |
3685 | "org.freedesktop.DBus", |
3686 | "/org/freedesktop/DBus", | |
3687 | "org.freedesktop.DBus", | |
8df433d7 | 3688 | "GetNameOwner"); |
3689 | if (r < 0) | |
3690 | return r; | |
3691 | ||
3692 | r = sd_bus_message_append(m, "s", name); | |
3693 | if (r < 0) | |
3694 | return r; | |
3695 | ||
3696 | r = sd_bus_call_async( | |
3697 | bus, | |
3698 | &u->get_name_owner_slot, | |
3699 | m, | |
a5b07847 LP |
3700 | get_name_owner_handler, |
3701 | u, | |
8df433d7 | 3702 | timeout_usec); |
3703 | ||
a5b07847 LP |
3704 | if (r < 0) { |
3705 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3706 | return r; | |
3707 | } | |
3708 | ||
3709 | log_unit_debug(u, "Watching D-Bus name '%s'.", name); | |
3710 | return 0; | |
bbc29086 DM |
3711 | } |
3712 | ||
05e343b7 | 3713 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3714 | int r; |
3715 | ||
05e343b7 LP |
3716 | assert(u); |
3717 | assert(name); | |
3718 | ||
3719 | /* Watch a specific name on the bus. We only support one unit | |
3720 | * watching each name for now. */ | |
3721 | ||
bbc29086 DM |
3722 | if (u->manager->api_bus) { |
3723 | /* If the bus is already available, install the match directly. | |
3724 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3725 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3726 | if (r < 0) |
8ea823b6 | 3727 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3728 | } |
3729 | ||
3730 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3731 | if (r < 0) { | |
3732 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
a5b07847 | 3733 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
bbc29086 DM |
3734 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); |
3735 | } | |
3736 | ||
3737 | return 0; | |
05e343b7 LP |
3738 | } |
3739 | ||
3740 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3741 | assert(u); | |
3742 | assert(name); | |
3743 | ||
8367fea5 | 3744 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3745 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
a5a8776a | 3746 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
05e343b7 LP |
3747 | } |
3748 | ||
d336ba9f | 3749 | int unit_add_node_dependency(Unit *u, const char *what, UnitDependency dep, UnitDependencyMask mask) { |
68eda4bd | 3750 | _cleanup_free_ char *e = NULL; |
44b0d1fd | 3751 | Unit *device; |
6e2ef85b LP |
3752 | int r; |
3753 | ||
3754 | assert(u); | |
3755 | ||
6e2ef85b | 3756 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3757 | if (isempty(what)) |
3758 | return 0; | |
6e2ef85b | 3759 | |
8407a5d0 | 3760 | if (!is_device_path(what)) |
6e2ef85b LP |
3761 | return 0; |
3762 | ||
44b0d1fd | 3763 | /* When device units aren't supported (such as in a container), don't create dependencies on them. */ |
1c2e9646 | 3764 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3765 | return 0; |
3766 | ||
7410616c LP |
3767 | r = unit_name_from_path(what, ".device", &e); |
3768 | if (r < 0) | |
3769 | return r; | |
6e2ef85b | 3770 | |
ac155bb8 | 3771 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3772 | if (r < 0) |
3773 | return r; | |
3774 | ||
ebc8968b FB |
3775 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3776 | dep = UNIT_BINDS_TO; | |
3777 | ||
d336ba9f FB |
3778 | return unit_add_two_dependencies(u, UNIT_AFTER, |
3779 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, | |
3780 | device, true, mask); | |
6e2ef85b | 3781 | } |
a16e1123 | 3782 | |
44b0d1fd LP |
3783 | int unit_add_blockdev_dependency(Unit *u, const char *what, UnitDependencyMask mask) { |
3784 | _cleanup_free_ char *escaped = NULL, *target = NULL; | |
3785 | int r; | |
3786 | ||
3787 | assert(u); | |
3788 | ||
3789 | if (isempty(what)) | |
3790 | return 0; | |
3791 | ||
3792 | if (!path_startswith(what, "/dev/")) | |
3793 | return 0; | |
3794 | ||
3795 | /* If we don't support devices, then also don't bother with blockdev@.target */ | |
3796 | if (!unit_type_supported(UNIT_DEVICE)) | |
3797 | return 0; | |
3798 | ||
3799 | r = unit_name_path_escape(what, &escaped); | |
3800 | if (r < 0) | |
3801 | return r; | |
3802 | ||
3803 | r = unit_name_build("blockdev", escaped, ".target", &target); | |
3804 | if (r < 0) | |
3805 | return r; | |
3806 | ||
3807 | return unit_add_dependency_by_name(u, UNIT_AFTER, target, true, mask); | |
3808 | } | |
3809 | ||
be847e82 | 3810 | int unit_coldplug(Unit *u) { |
95f74928 | 3811 | int r = 0; |
cca098b0 LP |
3812 | |
3813 | assert(u); | |
3814 | ||
f0831ed2 | 3815 | /* Make sure we don't enter a loop, when coldplugging recursively. */ |
f78f265f LP |
3816 | if (u->coldplugged) |
3817 | return 0; | |
3818 | ||
3819 | u->coldplugged = true; | |
3820 | ||
95f74928 MY |
3821 | STRV_FOREACH(i, u->deserialized_refs) |
3822 | RET_GATHER(r, bus_unit_track_add_name(u, *i)); | |
3823 | ||
05a98afd | 3824 | u->deserialized_refs = strv_free(u->deserialized_refs); |
cca098b0 | 3825 | |
95f74928 MY |
3826 | if (UNIT_VTABLE(u)->coldplug) |
3827 | RET_GATHER(r, UNIT_VTABLE(u)->coldplug(u)); | |
5a6158b6 | 3828 | |
95f74928 MY |
3829 | if (u->job) |
3830 | RET_GATHER(r, job_coldplug(u->job)); | |
3831 | if (u->nop_job) | |
3832 | RET_GATHER(r, job_coldplug(u->nop_job)); | |
cca098b0 | 3833 | |
49b6babb | 3834 | unit_modify_nft_set(u, /* add = */ true); |
05a98afd | 3835 | return r; |
cca098b0 LP |
3836 | } |
3837 | ||
f0831ed2 LP |
3838 | void unit_catchup(Unit *u) { |
3839 | assert(u); | |
3840 | ||
3841 | if (UNIT_VTABLE(u)->catchup) | |
3842 | UNIT_VTABLE(u)->catchup(u); | |
869f52f2 DS |
3843 | |
3844 | unit_cgroup_catchup(u); | |
f0831ed2 LP |
3845 | } |
3846 | ||
ba25d39e | 3847 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3848 | struct stat st; |
3849 | ||
3850 | if (!path) | |
3851 | return false; | |
3852 | ||
77969722 LP |
3853 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3854 | * are never out-of-date. */ | |
3855 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3856 | return false; | |
3857 | ||
21b95806 ZJS |
3858 | if (stat(path, &st) < 0) |
3859 | /* What, cannot access this anymore? */ | |
3860 | return true; | |
3861 | ||
ba25d39e ZJS |
3862 | if (path_masked) |
3863 | /* For masked files check if they are still so */ | |
3864 | return !null_or_empty(&st); | |
3865 | else | |
3a8db9fe | 3866 | /* For non-empty files check the mtime */ |
87ec20ef | 3867 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3868 | |
3869 | return false; | |
3870 | } | |
3871 | ||
45fb0699 | 3872 | bool unit_need_daemon_reload(Unit *u) { |
a82b8b3d | 3873 | _cleanup_strv_free_ char **dropins = NULL; |
1b64d026 | 3874 | |
45fb0699 | 3875 | assert(u); |
a82b8b3d MY |
3876 | assert(u->manager); |
3877 | ||
3878 | if (u->manager->unit_file_state_outdated) | |
3879 | return true; | |
45fb0699 | 3880 | |
ba25d39e ZJS |
3881 | /* For unit files, we allow masking… */ |
3882 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3883 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3884 | return true; |
5f4b19f4 | 3885 | |
ba25d39e ZJS |
3886 | /* Source paths should not be masked… */ |
3887 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3888 | return true; |
ae7a7182 | 3889 | |
19a44dfe | 3890 | if (u->load_state == UNIT_LOADED) |
a82b8b3d MY |
3891 | (void) unit_find_dropin_paths(u, &dropins); |
3892 | if (!strv_equal(u->dropin_paths, dropins)) | |
ab932a62 | 3893 | return true; |
6d10d308 | 3894 | |
ba25d39e | 3895 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3896 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3897 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3898 | return true; |
21b95806 | 3899 | |
ab932a62 | 3900 | return false; |
45fb0699 LP |
3901 | } |
3902 | ||
fdf20a31 | 3903 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3904 | assert(u); |
3905 | ||
fdf20a31 MM |
3906 | if (UNIT_VTABLE(u)->reset_failed) |
3907 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 | 3908 | |
7bf081a1 | 3909 | ratelimit_reset(&u->start_ratelimit); |
6bf0f408 | 3910 | u->start_limit_hit = false; |
5632e374 LP |
3911 | } |
3912 | ||
a7f241db LP |
3913 | Unit *unit_following(Unit *u) { |
3914 | assert(u); | |
3915 | ||
3916 | if (UNIT_VTABLE(u)->following) | |
3917 | return UNIT_VTABLE(u)->following(u); | |
3918 | ||
3919 | return NULL; | |
3920 | } | |
3921 | ||
31afa0a4 | 3922 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3923 | assert(u); |
3924 | ||
31afa0a4 LP |
3925 | /* This call does check the current state of the unit. It's |
3926 | * hence useful to be called from state change calls of the | |
3927 | * unit itself, where the state isn't updated yet. This is | |
3928 | * different from unit_inactive_or_pending() which checks both | |
3929 | * the current state and for a queued job. */ | |
18ffdfda | 3930 | |
28a2dfe8 | 3931 | return unit_has_job_type(u, JOB_STOP); |
31afa0a4 LP |
3932 | } |
3933 | ||
3934 | bool unit_inactive_or_pending(Unit *u) { | |
3935 | assert(u); | |
3936 | ||
3937 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3938 | |
d956ac29 LP |
3939 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3940 | return true; | |
3941 | ||
31afa0a4 | 3942 | if (unit_stop_pending(u)) |
18ffdfda LP |
3943 | return true; |
3944 | ||
3945 | return false; | |
3946 | } | |
3947 | ||
31afa0a4 | 3948 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3949 | assert(u); |
3950 | ||
f60c2665 | 3951 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3952 | |
3953 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3954 | return true; | |
3955 | ||
ac155bb8 | 3956 | if (u->job && |
3742095b | 3957 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
3958 | return true; |
3959 | ||
3960 | return false; | |
3961 | } | |
3962 | ||
52a12341 YW |
3963 | bool unit_will_restart_default(Unit *u) { |
3964 | assert(u); | |
3965 | ||
28a2dfe8 | 3966 | return unit_has_job_type(u, JOB_START); |
52a12341 YW |
3967 | } |
3968 | ||
deb4e708 MK |
3969 | bool unit_will_restart(Unit *u) { |
3970 | assert(u); | |
3971 | ||
3972 | if (!UNIT_VTABLE(u)->will_restart) | |
3973 | return false; | |
3974 | ||
3975 | return UNIT_VTABLE(u)->will_restart(u); | |
3976 | } | |
3977 | ||
38c41427 NK |
3978 | void unit_notify_cgroup_oom(Unit *u, bool managed_oom) { |
3979 | assert(u); | |
3980 | ||
3981 | if (UNIT_VTABLE(u)->notify_cgroup_oom) | |
3982 | UNIT_VTABLE(u)->notify_cgroup_oom(u, managed_oom); | |
3983 | } | |
3984 | ||
82659fd7 | 3985 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
af4fa99d | 3986 | _cleanup_set_free_ Set *pid_set = NULL; |
82659fd7 LP |
3987 | int r; |
3988 | ||
d5099efc | 3989 | pid_set = set_new(NULL); |
82659fd7 LP |
3990 | if (!pid_set) |
3991 | return NULL; | |
3992 | ||
3993 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3994 | if (main_pid > 0) { | |
fea72cc0 | 3995 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 | 3996 | if (r < 0) |
95f14a3e | 3997 | return NULL; |
82659fd7 LP |
3998 | } |
3999 | ||
4000 | if (control_pid > 0) { | |
fea72cc0 | 4001 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 | 4002 | if (r < 0) |
95f14a3e | 4003 | return NULL; |
82659fd7 LP |
4004 | } |
4005 | ||
95f14a3e | 4006 | return TAKE_PTR(pid_set); |
82659fd7 LP |
4007 | } |
4008 | ||
4d1b2df1 | 4009 | static int kill_common_log(const PidRef *pid, int signo, void *userdata) { |
d9911002 | 4010 | _cleanup_free_ char *comm = NULL; |
99534007 | 4011 | Unit *u = ASSERT_PTR(userdata); |
d9911002 | 4012 | |
4d1b2df1 LP |
4013 | (void) pidref_get_comm(pid, &comm); |
4014 | ||
d9911002 | 4015 | log_unit_info(u, "Sending signal SIG%s to process " PID_FMT " (%s) on client request.", |
4d1b2df1 | 4016 | signal_to_string(signo), pid->pid, strna(comm)); |
d9911002 LP |
4017 | |
4018 | return 1; | |
4019 | } | |
4020 | ||
37eb258e LP |
4021 | static int kill_or_sigqueue(PidRef* pidref, int signo, int code, int value) { |
4022 | assert(pidref_is_set(pidref)); | |
a721cd00 LP |
4023 | assert(SIGNAL_VALID(signo)); |
4024 | ||
4025 | switch (code) { | |
4026 | ||
4027 | case SI_USER: | |
37eb258e LP |
4028 | log_debug("Killing " PID_FMT " with signal SIG%s.", pidref->pid, signal_to_string(signo)); |
4029 | return pidref_kill(pidref, signo); | |
a721cd00 LP |
4030 | |
4031 | case SI_QUEUE: | |
37eb258e LP |
4032 | log_debug("Enqueuing value %i to " PID_FMT " on signal SIG%s.", value, pidref->pid, signal_to_string(signo)); |
4033 | return pidref_sigqueue(pidref, signo, value); | |
a721cd00 LP |
4034 | |
4035 | default: | |
4036 | assert_not_reached(); | |
4037 | } | |
4038 | } | |
4039 | ||
37eb258e | 4040 | int unit_kill( |
d91c34f2 LP |
4041 | Unit *u, |
4042 | KillWho who, | |
4043 | int signo, | |
a721cd00 LP |
4044 | int code, |
4045 | int value, | |
718db961 | 4046 | sd_bus_error *error) { |
d91c34f2 | 4047 | |
37eb258e | 4048 | PidRef *main_pid, *control_pid; |
ac5e3a50 | 4049 | bool killed = false; |
a721cd00 | 4050 | int ret = 0, r; |
814cc562 | 4051 | |
8aff7ac4 LP |
4052 | /* This is the common implementation for explicit user-requested killing of unit processes, shared by |
4053 | * various unit types. Do not confuse with unit_kill_context(), which is what we use when we want to | |
4054 | * stop a service ourselves. */ | |
4055 | ||
a721cd00 LP |
4056 | assert(u); |
4057 | assert(who >= 0); | |
4058 | assert(who < _KILL_WHO_MAX); | |
4059 | assert(SIGNAL_VALID(signo)); | |
4060 | assert(IN_SET(code, SI_USER, SI_QUEUE)); | |
4061 | ||
37eb258e LP |
4062 | main_pid = unit_main_pid(u); |
4063 | control_pid = unit_control_pid(u); | |
4064 | ||
4065 | if (!UNIT_HAS_CGROUP_CONTEXT(u) && !main_pid && !control_pid) | |
4066 | return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Unit type does not support process killing."); | |
4067 | ||
ac5e3a50 | 4068 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
37eb258e | 4069 | if (!main_pid) |
7358dc02 | 4070 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
37eb258e | 4071 | if (!pidref_is_set(main_pid)) |
7358dc02 | 4072 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
4073 | } |
4074 | ||
ac5e3a50 | 4075 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
37eb258e | 4076 | if (!control_pid) |
7358dc02 | 4077 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
37eb258e | 4078 | if (!pidref_is_set(control_pid)) |
7358dc02 | 4079 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
4080 | } |
4081 | ||
37eb258e | 4082 | if (pidref_is_set(control_pid) && |
a721cd00 LP |
4083 | IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) { |
4084 | _cleanup_free_ char *comm = NULL; | |
d7d74854 | 4085 | (void) pidref_get_comm(control_pid, &comm); |
d9911002 | 4086 | |
a721cd00 LP |
4087 | r = kill_or_sigqueue(control_pid, signo, code, value); |
4088 | if (r < 0) { | |
4089 | ret = r; | |
4090 | ||
4091 | /* Report this failure both to the logs and to the client */ | |
4092 | sd_bus_error_set_errnof( | |
4093 | error, r, | |
4094 | "Failed to send signal SIG%s to control process " PID_FMT " (%s): %m", | |
37eb258e | 4095 | signal_to_string(signo), control_pid->pid, strna(comm)); |
a721cd00 LP |
4096 | log_unit_warning_errno( |
4097 | u, r, | |
4098 | "Failed to send signal SIG%s to control process " PID_FMT " (%s) on client request: %m", | |
37eb258e | 4099 | signal_to_string(signo), control_pid->pid, strna(comm)); |
a721cd00 LP |
4100 | } else { |
4101 | log_unit_info(u, "Sent signal SIG%s to control process " PID_FMT " (%s) on client request.", | |
37eb258e | 4102 | signal_to_string(signo), control_pid->pid, strna(comm)); |
a721cd00 | 4103 | killed = true; |
ac5e3a50 | 4104 | } |
a721cd00 | 4105 | } |
814cc562 | 4106 | |
37eb258e | 4107 | if (pidref_is_set(main_pid) && |
a721cd00 | 4108 | IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) { |
a721cd00 | 4109 | _cleanup_free_ char *comm = NULL; |
d7d74854 | 4110 | (void) pidref_get_comm(main_pid, &comm); |
d9911002 | 4111 | |
a721cd00 LP |
4112 | r = kill_or_sigqueue(main_pid, signo, code, value); |
4113 | if (r < 0) { | |
4114 | if (ret == 0) { | |
4115 | ret = r; | |
4116 | ||
4117 | sd_bus_error_set_errnof( | |
4118 | error, r, | |
4119 | "Failed to send signal SIG%s to main process " PID_FMT " (%s): %m", | |
37eb258e | 4120 | signal_to_string(signo), main_pid->pid, strna(comm)); |
d9911002 | 4121 | } |
a721cd00 LP |
4122 | |
4123 | log_unit_warning_errno( | |
4124 | u, r, | |
4125 | "Failed to send signal SIG%s to main process " PID_FMT " (%s) on client request: %m", | |
37eb258e | 4126 | signal_to_string(signo), main_pid->pid, strna(comm)); |
a721cd00 LP |
4127 | |
4128 | } else { | |
4129 | log_unit_info(u, "Sent signal SIG%s to main process " PID_FMT " (%s) on client request.", | |
37eb258e | 4130 | signal_to_string(signo), main_pid->pid, strna(comm)); |
a721cd00 | 4131 | killed = true; |
ac5e3a50 | 4132 | } |
a721cd00 | 4133 | } |
814cc562 | 4134 | |
a721cd00 LP |
4135 | /* Note: if we shall enqueue rather than kill we won't do this via the cgroup mechanism, since it |
4136 | * doesn't really make much sense (and given that enqueued values are a relatively expensive | |
4137 | * resource, and we shouldn't allow us to be subjects for such allocation sprees) */ | |
4138 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path && code == SI_USER) { | |
814cc562 | 4139 | _cleanup_set_free_ Set *pid_set = NULL; |
814cc562 | 4140 | |
82659fd7 | 4141 | /* Exclude the main/control pids from being killed via the cgroup */ |
37eb258e | 4142 | pid_set = unit_pid_set(main_pid ? main_pid->pid : 0, control_pid ? control_pid->pid : 0); |
814cc562 | 4143 | if (!pid_set) |
d9911002 LP |
4144 | return log_oom(); |
4145 | ||
bd1791b5 | 4146 | r = cg_kill_recursive(u->cgroup_path, signo, 0, pid_set, kill_common_log, u); |
a721cd00 LP |
4147 | if (r < 0) { |
4148 | if (!IN_SET(r, -ESRCH, -ENOENT)) { | |
4149 | if (ret == 0) { | |
4150 | ret = r; | |
4151 | ||
d9911002 | 4152 | sd_bus_error_set_errnof( |
a721cd00 | 4153 | error, r, |
d9911002 LP |
4154 | "Failed to send signal SIG%s to auxiliary processes: %m", |
4155 | signal_to_string(signo)); | |
a721cd00 | 4156 | } |
d9911002 | 4157 | |
a721cd00 LP |
4158 | log_unit_warning_errno( |
4159 | u, r, | |
d9911002 LP |
4160 | "Failed to send signal SIG%s to auxiliary processes on client request: %m", |
4161 | signal_to_string(signo)); | |
4162 | } | |
4163 | } else | |
ac5e3a50 | 4164 | killed = true; |
814cc562 MS |
4165 | } |
4166 | ||
2ae0508e | 4167 | /* If the "fail" versions of the operation are requested, then complain if the set of processes we killed is empty */ |
a721cd00 | 4168 | if (ret == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL, KILL_MAIN_FAIL)) |
2ae0508e | 4169 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No matching processes to kill"); |
ac5e3a50 | 4170 | |
a721cd00 | 4171 | return ret; |
814cc562 MS |
4172 | } |
4173 | ||
6210e7fc LP |
4174 | int unit_following_set(Unit *u, Set **s) { |
4175 | assert(u); | |
4176 | assert(s); | |
4177 | ||
4178 | if (UNIT_VTABLE(u)->following_set) | |
4179 | return UNIT_VTABLE(u)->following_set(u, s); | |
4180 | ||
4181 | *s = NULL; | |
4182 | return 0; | |
4183 | } | |
4184 | ||
a4375746 | 4185 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
4186 | int r; |
4187 | ||
a4375746 LP |
4188 | assert(u); |
4189 | ||
0ec0deaa LP |
4190 | if (u->unit_file_state < 0 && u->fragment_path) { |
4191 | r = unit_file_get_state( | |
4870133b | 4192 | u->manager->runtime_scope, |
0ec0deaa | 4193 | NULL, |
9ea3a0e7 | 4194 | u->id, |
0ec0deaa LP |
4195 | &u->unit_file_state); |
4196 | if (r < 0) | |
4197 | u->unit_file_state = UNIT_FILE_BAD; | |
4198 | } | |
a4375746 | 4199 | |
ac155bb8 | 4200 | return u->unit_file_state; |
a4375746 LP |
4201 | } |
4202 | ||
e77e07f6 | 4203 | PresetAction unit_get_unit_file_preset(Unit *u) { |
a99626c1 LP |
4204 | int r; |
4205 | ||
d2dc52db LP |
4206 | assert(u); |
4207 | ||
a99626c1 LP |
4208 | if (u->unit_file_preset < 0 && u->fragment_path) { |
4209 | _cleanup_free_ char *bn = NULL; | |
4210 | ||
4211 | r = path_extract_filename(u->fragment_path, &bn); | |
4212 | if (r < 0) | |
4213 | return (u->unit_file_preset = r); | |
4214 | ||
4215 | if (r == O_DIRECTORY) | |
4216 | return (u->unit_file_preset = -EISDIR); | |
4217 | ||
d2dc52db | 4218 | u->unit_file_preset = unit_file_query_preset( |
4870133b | 4219 | u->manager->runtime_scope, |
0ec0deaa | 4220 | NULL, |
a99626c1 | 4221 | bn, |
8f7b2566 | 4222 | NULL); |
a99626c1 | 4223 | } |
d2dc52db LP |
4224 | |
4225 | return u->unit_file_preset; | |
4226 | } | |
4227 | ||
7f7d01ed | 4228 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 4229 | assert(ref); |
7f7d01ed ZJS |
4230 | assert(source); |
4231 | assert(target); | |
57020a3a | 4232 | |
7f7d01ed | 4233 | if (ref->target) |
57020a3a LP |
4234 | unit_ref_unset(ref); |
4235 | ||
7f7d01ed ZJS |
4236 | ref->source = source; |
4237 | ref->target = target; | |
4238 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
4239 | return target; | |
57020a3a LP |
4240 | } |
4241 | ||
4242 | void unit_ref_unset(UnitRef *ref) { | |
4243 | assert(ref); | |
4244 | ||
7f7d01ed | 4245 | if (!ref->target) |
57020a3a LP |
4246 | return; |
4247 | ||
b75102e5 LP |
4248 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
4249 | * be unreferenced now. */ | |
7f7d01ed | 4250 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 4251 | |
7f7d01ed ZJS |
4252 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
4253 | ref->source = ref->target = NULL; | |
57020a3a LP |
4254 | } |
4255 | ||
29206d46 LP |
4256 | static int user_from_unit_name(Unit *u, char **ret) { |
4257 | ||
4258 | static const uint8_t hash_key[] = { | |
4259 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
4260 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
4261 | }; | |
4262 | ||
4263 | _cleanup_free_ char *n = NULL; | |
4264 | int r; | |
4265 | ||
4266 | r = unit_name_to_prefix(u->id, &n); | |
4267 | if (r < 0) | |
4268 | return r; | |
4269 | ||
7a8867ab | 4270 | if (valid_user_group_name(n, 0)) { |
ae2a15bc | 4271 | *ret = TAKE_PTR(n); |
29206d46 LP |
4272 | return 0; |
4273 | } | |
4274 | ||
4275 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
4276 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
4277 | return -ENOMEM; | |
4278 | ||
4279 | return 0; | |
4280 | } | |
4281 | ||
598459ce LP |
4282 | int unit_patch_contexts(Unit *u) { |
4283 | CGroupContext *cc; | |
4284 | ExecContext *ec; | |
cba6e062 LP |
4285 | int r; |
4286 | ||
e06c73cc | 4287 | assert(u); |
e06c73cc | 4288 | |
598459ce LP |
4289 | /* Patch in the manager defaults into the exec and cgroup |
4290 | * contexts, _after_ the rest of the settings have been | |
4291 | * initialized */ | |
085afe36 | 4292 | |
598459ce LP |
4293 | ec = unit_get_exec_context(u); |
4294 | if (ec) { | |
4295 | /* This only copies in the ones that need memory */ | |
12375b95 | 4296 | for (unsigned i = 0; i < _RLIMIT_MAX; i++) |
c9e120e0 LP |
4297 | if (u->manager->defaults.rlimit[i] && !ec->rlimit[i]) { |
4298 | ec->rlimit[i] = newdup(struct rlimit, u->manager->defaults.rlimit[i], 1); | |
598459ce LP |
4299 | if (!ec->rlimit[i]) |
4300 | return -ENOMEM; | |
4301 | } | |
4302 | ||
463d0d15 | 4303 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4304 | !ec->working_directory) { |
4305 | ||
4306 | r = get_home_dir(&ec->working_directory); | |
4307 | if (r < 0) | |
4308 | return r; | |
4c08c824 LP |
4309 | |
4310 | /* Allow user services to run, even if the | |
4311 | * home directory is missing */ | |
4312 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4313 | } |
4314 | ||
598459ce | 4315 | if (ec->private_devices) |
2cd0a735 | 4316 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4317 | |
4318 | if (ec->protect_kernel_modules) | |
4319 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 | 4320 | |
84703040 KK |
4321 | if (ec->protect_kernel_logs) |
4322 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYSLOG); | |
4323 | ||
fc64760d KK |
4324 | if (ec->protect_clock) |
4325 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_SYS_TIME) | (UINT64_C(1) << CAP_WAKE_ALARM)); | |
4326 | ||
29206d46 LP |
4327 | if (ec->dynamic_user) { |
4328 | if (!ec->user) { | |
4329 | r = user_from_unit_name(u, &ec->user); | |
4330 | if (r < 0) | |
4331 | return r; | |
4332 | } | |
4333 | ||
4334 | if (!ec->group) { | |
4335 | ec->group = strdup(ec->user); | |
4336 | if (!ec->group) | |
4337 | return -ENOMEM; | |
4338 | } | |
4339 | ||
bf65b7e0 LP |
4340 | /* If the dynamic user option is on, let's make sure that the unit can't leave its |
4341 | * UID/GID around in the file system or on IPC objects. Hence enforce a strict | |
4342 | * sandbox. */ | |
63bb64a0 | 4343 | |
29206d46 | 4344 | ec->private_tmp = true; |
00d9ef85 | 4345 | ec->remove_ipc = true; |
63bb64a0 LP |
4346 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4347 | if (ec->protect_home == PROTECT_HOME_NO) | |
4348 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
bf65b7e0 LP |
4349 | |
4350 | /* Make sure this service can neither benefit from SUID/SGID binaries nor create | |
4351 | * them. */ | |
4352 | ec->no_new_privileges = true; | |
4353 | ec->restrict_suid_sgid = true; | |
29206d46 | 4354 | } |
a2ab603c YW |
4355 | |
4356 | for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) | |
4357 | exec_directory_sort(ec->directories + dt); | |
cba6e062 LP |
4358 | } |
4359 | ||
598459ce | 4360 | cc = unit_get_cgroup_context(u); |
fe65e88b | 4361 | if (cc && ec) { |
f513e420 | 4362 | |
fe65e88b | 4363 | if (ec->private_devices && |
084870f9 ZJS |
4364 | cc->device_policy == CGROUP_DEVICE_POLICY_AUTO) |
4365 | cc->device_policy = CGROUP_DEVICE_POLICY_CLOSED; | |
fe65e88b | 4366 | |
63857bf4 LB |
4367 | /* Only add these if needed, as they imply that everything else is blocked. */ |
4368 | if (cc->device_policy != CGROUP_DEVICE_POLICY_AUTO || cc->device_allow) { | |
4369 | if (ec->root_image || ec->mount_images) { | |
4370 | ||
4371 | /* When RootImage= or MountImages= is specified, the following devices are touched. */ | |
4372 | FOREACH_STRING(p, "/dev/loop-control", "/dev/mapper/control") { | |
a1044811 | 4373 | r = cgroup_context_add_device_allow(cc, p, CGROUP_DEVICE_READ|CGROUP_DEVICE_WRITE); |
63857bf4 LB |
4374 | if (r < 0) |
4375 | return r; | |
4376 | } | |
4377 | FOREACH_STRING(p, "block-loop", "block-blkext", "block-device-mapper") { | |
a1044811 | 4378 | r = cgroup_context_add_device_allow(cc, p, CGROUP_DEVICE_READ|CGROUP_DEVICE_WRITE|CGROUP_DEVICE_MKNOD); |
63857bf4 LB |
4379 | if (r < 0) |
4380 | return r; | |
4381 | } | |
fe65e88b | 4382 | |
63857bf4 LB |
4383 | /* Make sure "block-loop" can be resolved, i.e. make sure "loop" shows up in /proc/devices. |
4384 | * Same for mapper and verity. */ | |
4385 | FOREACH_STRING(p, "modprobe@loop.service", "modprobe@dm_mod.service", "modprobe@dm_verity.service") { | |
4386 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, p, true, UNIT_DEPENDENCY_FILE); | |
4387 | if (r < 0) | |
4388 | return r; | |
4389 | } | |
0cffae95 | 4390 | } |
867af728 | 4391 | |
63857bf4 | 4392 | if (ec->protect_clock) { |
a1044811 | 4393 | r = cgroup_context_add_device_allow(cc, "char-rtc", CGROUP_DEVICE_READ); |
0cffae95 LB |
4394 | if (r < 0) |
4395 | return r; | |
4396 | } | |
398dc7d3 LB |
4397 | |
4398 | /* If there are encrypted credentials we might need to access the TPM. */ | |
50a4217b | 4399 | if (exec_context_has_encrypted_credentials(ec)) { |
a1044811 | 4400 | r = cgroup_context_add_device_allow(cc, "char-tpm", CGROUP_DEVICE_READ|CGROUP_DEVICE_WRITE); |
d5902569 AD |
4401 | if (r < 0) |
4402 | return r; | |
4403 | } | |
fe65e88b | 4404 | } |
598459ce | 4405 | } |
f1660f96 | 4406 | |
cba6e062 | 4407 | return 0; |
e06c73cc LP |
4408 | } |
4409 | ||
c2503e35 | 4410 | ExecContext *unit_get_exec_context(const Unit *u) { |
3ef63c31 LP |
4411 | size_t offset; |
4412 | assert(u); | |
4413 | ||
598459ce LP |
4414 | if (u->type < 0) |
4415 | return NULL; | |
4416 | ||
3ef63c31 LP |
4417 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4418 | if (offset <= 0) | |
4419 | return NULL; | |
4420 | ||
4421 | return (ExecContext*) ((uint8_t*) u + offset); | |
4422 | } | |
4423 | ||
718db961 LP |
4424 | KillContext *unit_get_kill_context(Unit *u) { |
4425 | size_t offset; | |
4426 | assert(u); | |
4427 | ||
598459ce LP |
4428 | if (u->type < 0) |
4429 | return NULL; | |
4430 | ||
718db961 LP |
4431 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4432 | if (offset <= 0) | |
4433 | return NULL; | |
4434 | ||
4435 | return (KillContext*) ((uint8_t*) u + offset); | |
4436 | } | |
4437 | ||
4ad49000 LP |
4438 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4439 | size_t offset; | |
4440 | ||
598459ce LP |
4441 | if (u->type < 0) |
4442 | return NULL; | |
4443 | ||
4ad49000 LP |
4444 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4445 | if (offset <= 0) | |
4446 | return NULL; | |
4447 | ||
4448 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4449 | } | |
4450 | ||
28135da3 | 4451 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
613b411c LP |
4452 | size_t offset; |
4453 | ||
598459ce LP |
4454 | if (u->type < 0) |
4455 | return NULL; | |
4456 | ||
613b411c LP |
4457 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4458 | if (offset <= 0) | |
4459 | return NULL; | |
4460 | ||
28135da3 | 4461 | return *(ExecRuntime**) ((uint8_t*) u + offset); |
613b411c LP |
4462 | } |
4463 | ||
2e59b241 | 4464 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4465 | assert(u); |
4466 | ||
2e59b241 | 4467 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4468 | return NULL; |
4469 | ||
39591351 LP |
4470 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4471 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4472 | |
2e59b241 | 4473 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4474 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4475 | |
2e59b241 LP |
4476 | if (flags & UNIT_RUNTIME) |
4477 | return u->manager->lookup_paths.runtime_control; | |
4478 | ||
39591351 | 4479 | return NULL; |
71645aca LP |
4480 | } |
4481 | ||
68ecb48b ZJS |
4482 | const char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4483 | assert(s); | |
8c41640a | 4484 | assert(popcount(flags & (UNIT_ESCAPE_EXEC_SYNTAX_ENV | UNIT_ESCAPE_EXEC_SYNTAX | UNIT_ESCAPE_C)) <= 1); |
68ecb48b | 4485 | assert(buf); |
24536beb ZJS |
4486 | |
4487 | _cleanup_free_ char *t = NULL; | |
2e59b241 | 4488 | |
68ecb48b ZJS |
4489 | /* Returns a string with any escaping done. If no escaping was necessary, *buf is set to NULL, and |
4490 | * the input pointer is returned as-is. If an allocation was needed, the return buffer pointer is | |
4491 | * written to *buf. This means the return value always contains a properly escaped version, but *buf | |
4492 | * only contains a pointer if an allocation was made. Callers can use this to optimize memory | |
4493 | * allocations. */ | |
2e59b241 LP |
4494 | |
4495 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
24536beb ZJS |
4496 | t = specifier_escape(s); |
4497 | if (!t) | |
2e59b241 LP |
4498 | return NULL; |
4499 | ||
24536beb | 4500 | s = t; |
2e59b241 LP |
4501 | } |
4502 | ||
4a055e5a | 4503 | /* We either do C-escaping or shell-escaping, to additionally escape characters that we parse for |
e7416db1 | 4504 | * ExecStart= and friends, i.e. '$' and quotes. */ |
24536beb | 4505 | |
8c41640a | 4506 | if (flags & (UNIT_ESCAPE_EXEC_SYNTAX_ENV | UNIT_ESCAPE_EXEC_SYNTAX)) { |
e7416db1 ZJS |
4507 | char *t2; |
4508 | ||
8c41640a ZJS |
4509 | if (flags & UNIT_ESCAPE_EXEC_SYNTAX_ENV) { |
4510 | t2 = strreplace(s, "$", "$$"); | |
4511 | if (!t2) | |
4512 | return NULL; | |
4513 | free_and_replace(t, t2); | |
4514 | } | |
e7416db1 | 4515 | |
8c41640a | 4516 | t2 = shell_escape(t ?: s, "\""); |
24536beb ZJS |
4517 | if (!t2) |
4518 | return NULL; | |
4519 | free_and_replace(t, t2); | |
4520 | ||
4521 | s = t; | |
2e59b241 | 4522 | |
24536beb | 4523 | } else if (flags & UNIT_ESCAPE_C) { |
e7416db1 ZJS |
4524 | char *t2; |
4525 | ||
4526 | t2 = cescape(s); | |
24536beb | 4527 | if (!t2) |
2e59b241 | 4528 | return NULL; |
24536beb | 4529 | free_and_replace(t, t2); |
2e59b241 | 4530 | |
24536beb | 4531 | s = t; |
2e59b241 LP |
4532 | } |
4533 | ||
68ecb48b ZJS |
4534 | *buf = TAKE_PTR(t); |
4535 | return s; | |
2e59b241 LP |
4536 | } |
4537 | ||
4538 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4539 | _cleanup_free_ char *result = NULL; | |
319a4f4b | 4540 | size_t n = 0; |
2e59b241 | 4541 | |
24536beb ZJS |
4542 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command |
4543 | * lines in a way suitable for ExecStart= stanzas. */ | |
2e59b241 LP |
4544 | |
4545 | STRV_FOREACH(i, l) { | |
4546 | _cleanup_free_ char *buf = NULL; | |
4547 | const char *p; | |
4548 | size_t a; | |
4549 | char *q; | |
4550 | ||
4551 | p = unit_escape_setting(*i, flags, &buf); | |
4552 | if (!p) | |
4553 | return NULL; | |
4554 | ||
4555 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
319a4f4b | 4556 | if (!GREEDY_REALLOC(result, n + a + 1)) |
2e59b241 LP |
4557 | return NULL; |
4558 | ||
4559 | q = result + n; | |
4560 | if (n > 0) | |
4561 | *(q++) = ' '; | |
4562 | ||
4563 | *(q++) = '"'; | |
4564 | q = stpcpy(q, p); | |
4565 | *(q++) = '"'; | |
4566 | ||
4567 | n += a; | |
4568 | } | |
4569 | ||
319a4f4b | 4570 | if (!GREEDY_REALLOC(result, n + 1)) |
2e59b241 LP |
4571 | return NULL; |
4572 | ||
4573 | result[n] = 0; | |
4574 | ||
ae2a15bc | 4575 | return TAKE_PTR(result); |
2e59b241 LP |
4576 | } |
4577 | ||
4578 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4579 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4580 | const char *dir, *wrapped; |
26d04f86 | 4581 | int r; |
71645aca LP |
4582 | |
4583 | assert(u); | |
2e59b241 LP |
4584 | assert(name); |
4585 | assert(data); | |
4586 | ||
4587 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4588 | return 0; | |
4589 | ||
4590 | data = unit_escape_setting(data, flags, &escaped); | |
4591 | if (!data) | |
4592 | return -ENOMEM; | |
4593 | ||
4594 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4595 | * previous section header is the same */ | |
4596 | ||
4597 | if (flags & UNIT_PRIVATE) { | |
4598 | if (!UNIT_VTABLE(u)->private_section) | |
4599 | return -EINVAL; | |
4600 | ||
4601 | if (!u->transient_file || u->last_section_private < 0) | |
4602 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4603 | else if (u->last_section_private == 0) | |
4604 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4605 | } else { | |
4606 | if (!u->transient_file || u->last_section_private < 0) | |
4607 | data = strjoina("[Unit]\n", data); | |
4608 | else if (u->last_section_private > 0) | |
4609 | data = strjoina("\n[Unit]\n", data); | |
4610 | } | |
71645aca | 4611 | |
4f4afc88 LP |
4612 | if (u->transient_file) { |
4613 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4614 | * write to the transient unit file. */ | |
4615 | fputs(data, u->transient_file); | |
4f4afc88 | 4616 | |
2e59b241 LP |
4617 | if (!endswith(data, "\n")) |
4618 | fputc('\n', u->transient_file); | |
4619 | ||
4620 | /* Remember which section we wrote this entry to */ | |
4621 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4622 | return 0; |
2e59b241 | 4623 | } |
8e2af478 | 4624 | |
2e59b241 | 4625 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4626 | if (!dir) |
4627 | return -EINVAL; | |
71645aca | 4628 | |
2a9a6f8a | 4629 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4630 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4631 | data, |
4632 | "\n"); | |
e20b2a86 | 4633 | |
815b09d3 | 4634 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4635 | if (r < 0) |
4636 | return r; | |
4637 | ||
45639f1b | 4638 | (void) mkdir_p_label(p, 0755); |
4dba44a5 ZJS |
4639 | |
4640 | /* Make sure the drop-in dir is registered in our path cache. This way we don't need to stupidly | |
4641 | * recreate the cache after every drop-in we write. */ | |
4642 | if (u->manager->unit_path_cache) { | |
be327321 | 4643 | r = set_put_strdup(&u->manager->unit_path_cache, p); |
4dba44a5 ZJS |
4644 | if (r < 0) |
4645 | return r; | |
4646 | } | |
4647 | ||
2a9a6f8a | 4648 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4649 | if (r < 0) |
4650 | return r; | |
4651 | ||
815b09d3 | 4652 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4653 | if (r < 0) |
4654 | return r; | |
815b09d3 | 4655 | q = NULL; |
adb76a70 | 4656 | |
adb76a70 WC |
4657 | strv_uniq(u->dropin_paths); |
4658 | ||
4659 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4660 | ||
4661 | return 0; | |
26d04f86 | 4662 | } |
71645aca | 4663 | |
2e59b241 | 4664 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4665 | _cleanup_free_ char *p = NULL; |
4666 | va_list ap; | |
4667 | int r; | |
4668 | ||
4669 | assert(u); | |
4670 | assert(name); | |
4671 | assert(format); | |
4672 | ||
2e59b241 | 4673 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4674 | return 0; |
4675 | ||
4676 | va_start(ap, format); | |
4677 | r = vasprintf(&p, format, ap); | |
4678 | va_end(ap); | |
4679 | ||
4680 | if (r < 0) | |
4681 | return -ENOMEM; | |
4682 | ||
2e59b241 | 4683 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4684 | } |
71645aca | 4685 | |
c2756a68 | 4686 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4687 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4688 | FILE *f; |
4f4afc88 | 4689 | |
c2756a68 LP |
4690 | assert(u); |
4691 | ||
3f5e8115 LP |
4692 | if (!UNIT_VTABLE(u)->can_transient) |
4693 | return -EOPNOTSUPP; | |
4694 | ||
45639f1b LP |
4695 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4696 | ||
657ee2d8 | 4697 | path = path_join(u->manager->lookup_paths.transient, u->id); |
4f4afc88 LP |
4698 | if (!path) |
4699 | return -ENOMEM; | |
4700 | ||
4701 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4702 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4703 | ||
2053593f | 4704 | WITH_UMASK(0022) { |
4f4afc88 | 4705 | f = fopen(path, "we"); |
0126c8f3 | 4706 | if (!f) |
78e334b5 | 4707 | return -errno; |
4f4afc88 LP |
4708 | } |
4709 | ||
0126c8f3 | 4710 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4711 | u->transient_file = f; |
4712 | ||
0126c8f3 | 4713 | free_and_replace(u->fragment_path, path); |
7c65093a | 4714 | |
7c65093a LP |
4715 | u->source_path = mfree(u->source_path); |
4716 | u->dropin_paths = strv_free(u->dropin_paths); | |
4717 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4718 | ||
4f4afc88 LP |
4719 | u->load_state = UNIT_STUB; |
4720 | u->load_error = 0; | |
4721 | u->transient = true; | |
4722 | ||
7c65093a LP |
4723 | unit_add_to_dbus_queue(u); |
4724 | unit_add_to_gc_queue(u); | |
c2756a68 | 4725 | |
4f4afc88 LP |
4726 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4727 | u->transient_file); | |
4728 | ||
3f5e8115 | 4729 | return 0; |
c2756a68 LP |
4730 | } |
4731 | ||
4d1b2df1 | 4732 | static int log_kill(const PidRef *pid, int sig, void *userdata) { |
1d98fef1 LP |
4733 | _cleanup_free_ char *comm = NULL; |
4734 | ||
4d1b2df1 LP |
4735 | assert(pidref_is_set(pid)); |
4736 | ||
4737 | (void) pidref_get_comm(pid, &comm); | |
1d98fef1 LP |
4738 | |
4739 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4740 | only, like for example systemd's own PAM stub process. */ | |
4741 | if (comm && comm[0] == '(') | |
500cd2e8 | 4742 | /* Although we didn't log anything, as this callback is used in unit_kill_context we must return 1 |
4743 | * here to let the manager know that a process was killed. */ | |
4744 | return 1; | |
1d98fef1 LP |
4745 | |
4746 | log_unit_notice(userdata, | |
4747 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4d1b2df1 | 4748 | pid->pid, |
1d98fef1 LP |
4749 | strna(comm), |
4750 | signal_to_string(sig)); | |
c53d2d54 DB |
4751 | |
4752 | return 1; | |
1d98fef1 LP |
4753 | } |
4754 | ||
efa75d70 LP |
4755 | static int operation_to_signal( |
4756 | const KillContext *c, | |
4757 | KillOperation k, | |
4758 | bool *ret_noteworthy) { | |
4759 | ||
1d98fef1 LP |
4760 | assert(c); |
4761 | ||
4762 | switch (k) { | |
4763 | ||
4764 | case KILL_TERMINATE: | |
4765 | case KILL_TERMINATE_AND_LOG: | |
efa75d70 | 4766 | *ret_noteworthy = false; |
1d98fef1 LP |
4767 | return c->kill_signal; |
4768 | ||
a232ebcc | 4769 | case KILL_RESTART: |
efa75d70 | 4770 | *ret_noteworthy = false; |
a232ebcc ZJS |
4771 | return restart_kill_signal(c); |
4772 | ||
1d98fef1 | 4773 | case KILL_KILL: |
efa75d70 | 4774 | *ret_noteworthy = true; |
fbb48d4c | 4775 | return c->final_kill_signal; |
1d98fef1 | 4776 | |
c87700a1 | 4777 | case KILL_WATCHDOG: |
efa75d70 | 4778 | *ret_noteworthy = true; |
c87700a1 | 4779 | return c->watchdog_signal; |
1d98fef1 LP |
4780 | |
4781 | default: | |
04499a70 | 4782 | assert_not_reached(); |
1d98fef1 LP |
4783 | } |
4784 | } | |
4785 | ||
cd2086fe LP |
4786 | int unit_kill_context( |
4787 | Unit *u, | |
4788 | KillContext *c, | |
db2cb23b | 4789 | KillOperation k, |
7901288a LP |
4790 | PidRef* main_pid, |
4791 | PidRef* control_pid, | |
cd2086fe LP |
4792 | bool main_pid_alien) { |
4793 | ||
1d98fef1 | 4794 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4795 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4796 | int sig, r; |
cd2086fe LP |
4797 | |
4798 | assert(u); | |
4799 | assert(c); | |
4800 | ||
8aff7ac4 LP |
4801 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. Returns > 0 |
4802 | * if we killed something worth waiting for, 0 otherwise. Do not confuse with unit_kill_common() | |
4803 | * which is used for user-requested killing of unit processes. */ | |
1d98fef1 | 4804 | |
cd2086fe LP |
4805 | if (c->kill_mode == KILL_NONE) |
4806 | return 0; | |
4807 | ||
4ab1670f ZJS |
4808 | bool noteworthy; |
4809 | sig = operation_to_signal(c, k, ¬eworthy); | |
4810 | if (noteworthy) | |
4811 | log_func = log_kill; | |
1d98fef1 LP |
4812 | |
4813 | send_sighup = | |
4814 | c->send_sighup && | |
4815 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4816 | sig != SIGHUP; | |
4817 | ||
7901288a | 4818 | if (pidref_is_set(main_pid)) { |
1d98fef1 | 4819 | if (log_func) |
4d1b2df1 | 4820 | log_func(main_pid, sig, u); |
cd2086fe | 4821 | |
7901288a | 4822 | r = pidref_kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4823 | if (r < 0 && r != -ESRCH) { |
4824 | _cleanup_free_ char *comm = NULL; | |
d7d74854 | 4825 | (void) pidref_get_comm(main_pid, &comm); |
cd2086fe | 4826 | |
7901288a | 4827 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid->pid, strna(comm)); |
82659fd7 | 4828 | } else { |
bc6aed7b LP |
4829 | if (!main_pid_alien) |
4830 | wait_for_exit = true; | |
82659fd7 | 4831 | |
1d98fef1 | 4832 | if (r != -ESRCH && send_sighup) |
7901288a | 4833 | (void) pidref_kill(main_pid, SIGHUP); |
82659fd7 | 4834 | } |
cd2086fe LP |
4835 | } |
4836 | ||
7901288a | 4837 | if (pidref_is_set(control_pid)) { |
1d98fef1 | 4838 | if (log_func) |
4d1b2df1 | 4839 | log_func(control_pid, sig, u); |
cd2086fe | 4840 | |
7901288a | 4841 | r = pidref_kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4842 | if (r < 0 && r != -ESRCH) { |
4843 | _cleanup_free_ char *comm = NULL; | |
d7d74854 | 4844 | (void) pidref_get_comm(control_pid, &comm); |
cd2086fe | 4845 | |
7901288a | 4846 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid->pid, strna(comm)); |
82659fd7 | 4847 | } else { |
cd2086fe | 4848 | wait_for_exit = true; |
82659fd7 | 4849 | |
1d98fef1 | 4850 | if (r != -ESRCH && send_sighup) |
7901288a | 4851 | (void) pidref_kill(control_pid, SIGHUP); |
82659fd7 | 4852 | } |
cd2086fe LP |
4853 | } |
4854 | ||
b821a397 LP |
4855 | if (u->cgroup_path && |
4856 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4857 | _cleanup_set_free_ Set *pid_set = NULL; |
4858 | ||
82659fd7 | 4859 | /* Exclude the main/control pids from being killed via the cgroup */ |
7901288a | 4860 | pid_set = unit_pid_set(main_pid ? main_pid->pid : 0, control_pid ? control_pid->pid : 0); |
cd2086fe LP |
4861 | if (!pid_set) |
4862 | return -ENOMEM; | |
4863 | ||
bd1791b5 LP |
4864 | r = cg_kill_recursive( |
4865 | u->cgroup_path, | |
4866 | sig, | |
4867 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4868 | pid_set, | |
4869 | log_func, u); | |
cd2086fe | 4870 | if (r < 0) { |
4c701096 | 4871 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
6178e2f8 | 4872 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", empty_to_root(u->cgroup_path)); |
b821a397 | 4873 | |
82659fd7 | 4874 | } else if (r > 0) { |
bc6aed7b | 4875 | |
1d9cc876 LP |
4876 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4877 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
4878 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
4879 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
4880 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
4881 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 4882 | |
c22800e4 | 4883 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 4884 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 4885 | wait_for_exit = true; |
58ea275a | 4886 | |
1d98fef1 | 4887 | if (send_sighup) { |
82659fd7 LP |
4888 | set_free(pid_set); |
4889 | ||
7901288a | 4890 | pid_set = unit_pid_set(main_pid ? main_pid->pid : 0, control_pid ? control_pid->pid : 0); |
82659fd7 LP |
4891 | if (!pid_set) |
4892 | return -ENOMEM; | |
4893 | ||
bd1791b5 LP |
4894 | (void) cg_kill_recursive( |
4895 | u->cgroup_path, | |
4896 | SIGHUP, | |
4897 | CGROUP_IGNORE_SELF, | |
4898 | pid_set, | |
4899 | /* kill_log= */ NULL, | |
4900 | /* userdata= */ NULL); | |
82659fd7 LP |
4901 | } |
4902 | } | |
cd2086fe LP |
4903 | } |
4904 | ||
4905 | return wait_for_exit; | |
4906 | } | |
4907 | ||
eef85c4a | 4908 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
a57f7e2c LP |
4909 | int r; |
4910 | ||
4911 | assert(u); | |
4912 | assert(path); | |
4913 | ||
ac19bdd0 ZJS |
4914 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these |
4915 | * paths in the unit (from the path to the UnitDependencyInfo structure indicating how to the | |
4916 | * dependency came to be). However, we build a prefix table for all possible prefixes so that new | |
4917 | * appearing mount units can easily determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4918 | |
70b64bd3 ZJS |
4919 | if (!path_is_absolute(path)) |
4920 | return -EINVAL; | |
4921 | ||
ac19bdd0 ZJS |
4922 | if (hashmap_contains(u->requires_mounts_for, path)) /* Exit quickly if the path is already covered. */ |
4923 | return 0; | |
eef85c4a | 4924 | |
ac19bdd0 ZJS |
4925 | /* Use the canonical form of the path as the stored key. We call path_is_normalized() |
4926 | * only after simplification, since path_is_normalized() rejects paths with '.'. | |
4927 | * path_is_normalized() also verifies that the path fits in PATH_MAX. */ | |
cf3d95b2 YW |
4928 | _cleanup_free_ char *p = NULL; |
4929 | r = path_simplify_alloc(path, &p); | |
4930 | if (r < 0) | |
4931 | return r; | |
4932 | path = p; | |
a57f7e2c | 4933 | |
ca8700e9 | 4934 | if (!path_is_normalized(path)) |
a57f7e2c | 4935 | return -EPERM; |
a57f7e2c | 4936 | |
ac19bdd0 | 4937 | UnitDependencyInfo di = { |
eef85c4a LP |
4938 | .origin_mask = mask |
4939 | }; | |
4940 | ||
ac19bdd0 | 4941 | r = hashmap_ensure_put(&u->requires_mounts_for, &path_hash_ops, p, di.data); |
ca8700e9 | 4942 | if (r < 0) |
a57f7e2c | 4943 | return r; |
ac19bdd0 ZJS |
4944 | assert(r > 0); |
4945 | TAKE_PTR(p); /* path remains a valid pointer to the string stored in the hashmap */ | |
a57f7e2c | 4946 | |
4cb06c59 | 4947 | char prefix[strlen(path) + 1]; |
ca8700e9 | 4948 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
a57f7e2c LP |
4949 | Set *x; |
4950 | ||
4951 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4952 | if (!x) { | |
ca8700e9 | 4953 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 4954 | |
548f6937 | 4955 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
742f41ad LP |
4956 | if (r < 0) |
4957 | return r; | |
a57f7e2c LP |
4958 | |
4959 | q = strdup(prefix); | |
4960 | if (!q) | |
4961 | return -ENOMEM; | |
4962 | ||
d5099efc | 4963 | x = set_new(NULL); |
ca8700e9 | 4964 | if (!x) |
a57f7e2c | 4965 | return -ENOMEM; |
a57f7e2c LP |
4966 | |
4967 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4968 | if (r < 0) { | |
a57f7e2c LP |
4969 | set_free(x); |
4970 | return r; | |
4971 | } | |
ca8700e9 | 4972 | q = NULL; |
a57f7e2c LP |
4973 | } |
4974 | ||
4975 | r = set_put(x, u); | |
4976 | if (r < 0) | |
4977 | return r; | |
4978 | } | |
4979 | ||
4980 | return 0; | |
4981 | } | |
4982 | ||
613b411c | 4983 | int unit_setup_exec_runtime(Unit *u) { |
28135da3 | 4984 | _cleanup_(exec_shared_runtime_unrefp) ExecSharedRuntime *esr = NULL; |
15220772 | 4985 | _cleanup_(dynamic_creds_unrefp) DynamicCreds *dcreds = NULL; |
83123a44 | 4986 | _cleanup_set_free_ Set *units = NULL; |
28135da3 | 4987 | ExecRuntime **rt; |
15220772 | 4988 | ExecContext *ec; |
613b411c | 4989 | size_t offset; |
613b411c | 4990 | Unit *other; |
e8a565cb | 4991 | int r; |
613b411c LP |
4992 | |
4993 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4994 | assert(offset > 0); | |
4995 | ||
28135da3 DDM |
4996 | /* Check if there already is an ExecRuntime for this unit? */ |
4997 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
613b411c LP |
4998 | if (*rt) |
4999 | return 0; | |
5000 | ||
15220772 DDM |
5001 | ec = unit_get_exec_context(u); |
5002 | assert(ec); | |
5003 | ||
83123a44 YW |
5004 | r = unit_get_transitive_dependency_set(u, UNIT_ATOM_JOINS_NAMESPACE_OF, &units); |
5005 | if (r < 0) | |
5006 | return r; | |
5007 | ||
613b411c | 5008 | /* Try to get it from somebody else */ |
83123a44 | 5009 | SET_FOREACH(other, units) { |
28135da3 DDM |
5010 | r = exec_shared_runtime_acquire(u->manager, NULL, other->id, false, &esr); |
5011 | if (r < 0) | |
5012 | return r; | |
5013 | if (r > 0) | |
5014 | break; | |
5015 | } | |
5016 | ||
5017 | if (!esr) { | |
15220772 | 5018 | r = exec_shared_runtime_acquire(u->manager, ec, u->id, true, &esr); |
28135da3 DDM |
5019 | if (r < 0) |
5020 | return r; | |
613b411c LP |
5021 | } |
5022 | ||
15220772 DDM |
5023 | if (ec->dynamic_user) { |
5024 | r = dynamic_creds_make(u->manager, ec->user, ec->group, &dcreds); | |
5025 | if (r < 0) | |
5026 | return r; | |
5027 | } | |
5028 | ||
9c0c6701 | 5029 | r = exec_runtime_make(u, ec, esr, dcreds, rt); |
28135da3 DDM |
5030 | if (r < 0) |
5031 | return r; | |
5032 | ||
5033 | TAKE_PTR(esr); | |
15220772 | 5034 | TAKE_PTR(dcreds); |
28135da3 DDM |
5035 | |
5036 | return r; | |
613b411c LP |
5037 | } |
5038 | ||
1c2e9646 | 5039 | bool unit_type_supported(UnitType t) { |
88e4bfa6 MS |
5040 | static int8_t cache[_UNIT_TYPE_MAX] = {}; /* -1: disabled, 1: enabled: 0: don't know */ |
5041 | int r; | |
5042 | ||
1c2e9646 LP |
5043 | if (_unlikely_(t < 0)) |
5044 | return false; | |
5045 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
5046 | return false; | |
5047 | ||
88e4bfa6 MS |
5048 | if (cache[t] == 0) { |
5049 | char *e; | |
5050 | ||
5051 | e = strjoina("SYSTEMD_SUPPORT_", unit_type_to_string(t)); | |
5052 | ||
5053 | r = getenv_bool(ascii_strupper(e)); | |
5054 | if (r < 0 && r != -ENXIO) | |
5055 | log_debug_errno(r, "Failed to parse $%s, ignoring: %m", e); | |
5056 | ||
5057 | cache[t] = r == 0 ? -1 : 1; | |
5058 | } | |
5059 | if (cache[t] < 0) | |
5060 | return false; | |
5061 | ||
1c2e9646 LP |
5062 | if (!unit_vtable[t]->supported) |
5063 | return true; | |
5064 | ||
5065 | return unit_vtable[t]->supported(); | |
5066 | } | |
5067 | ||
8b4305c7 LP |
5068 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
5069 | int r; | |
5070 | ||
5071 | assert(u); | |
5072 | assert(where); | |
5073 | ||
c2503e35 RH |
5074 | if (!unit_log_level_test(u, LOG_NOTICE)) |
5075 | return; | |
5076 | ||
db55bbf2 | 5077 | r = dir_is_empty(where, /* ignore_hidden_or_backup= */ false); |
3f602115 | 5078 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
5079 | return; |
5080 | if (r < 0) { | |
5081 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
5082 | return; | |
5083 | } | |
5084 | ||
c2503e35 RH |
5085 | log_unit_struct(u, LOG_NOTICE, |
5086 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
5087 | LOG_UNIT_INVOCATION_ID(u), | |
5088 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
5089 | "WHERE=%s", where); | |
8b4305c7 LP |
5090 | } |
5091 | ||
25cd4964 | 5092 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
58d9d89b | 5093 | _cleanup_free_ char *canonical_where = NULL; |
8b4305c7 LP |
5094 | int r; |
5095 | ||
5096 | assert(u); | |
5097 | assert(where); | |
5098 | ||
f461a28d | 5099 | r = chase(where, NULL, CHASE_NONEXISTENT, &canonical_where, NULL); |
8b4305c7 | 5100 | if (r < 0) { |
25cd4964 | 5101 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
5102 | return 0; |
5103 | } | |
25cd4964 AJ |
5104 | |
5105 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
5106 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
5107 | return 0; |
5108 | ||
25cd4964 | 5109 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
c2503e35 RH |
5110 | log_unit_struct(u, LOG_ERR, |
5111 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
5112 | LOG_UNIT_INVOCATION_ID(u), | |
5113 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), | |
5114 | "WHERE=%s", where); | |
8b4305c7 LP |
5115 | |
5116 | return -ELOOP; | |
5117 | } | |
0f13f3bd LP |
5118 | |
5119 | bool unit_is_pristine(Unit *u) { | |
5120 | assert(u); | |
5121 | ||
1f832446 ZJS |
5122 | /* Check if the unit already exists or is already around, in a number of different ways. Note that to |
5123 | * cater for unit types such as slice, we are generally fine with units that are marked UNIT_LOADED | |
5124 | * even though nothing was actually loaded, as those unit types don't require a file on disk. | |
5125 | * | |
5126 | * Note that we don't check for drop-ins here, because we allow drop-ins for transient units | |
5127 | * identically to non-transient units, both unit-specific and hierarchical. E.g. for a-b-c.service: | |
5128 | * service.d/….conf, a-.service.d/….conf, a-b-.service.d/….conf, a-b-c.service.d/….conf. | |
5129 | */ | |
0f13f3bd | 5130 | |
b146a734 ZJS |
5131 | return IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) && |
5132 | !u->fragment_path && | |
5133 | !u->source_path && | |
b146a734 ZJS |
5134 | !u->job && |
5135 | !u->merged_into; | |
0f13f3bd | 5136 | } |
291d565a | 5137 | |
37eb258e | 5138 | PidRef* unit_control_pid(Unit *u) { |
291d565a LP |
5139 | assert(u); |
5140 | ||
5141 | if (UNIT_VTABLE(u)->control_pid) | |
5142 | return UNIT_VTABLE(u)->control_pid(u); | |
5143 | ||
37eb258e | 5144 | return NULL; |
291d565a LP |
5145 | } |
5146 | ||
37eb258e | 5147 | PidRef* unit_main_pid(Unit *u) { |
291d565a LP |
5148 | assert(u); |
5149 | ||
5150 | if (UNIT_VTABLE(u)->main_pid) | |
5151 | return UNIT_VTABLE(u)->main_pid(u); | |
5152 | ||
37eb258e | 5153 | return NULL; |
291d565a | 5154 | } |
00d9ef85 | 5155 | |
3bb48b19 TM |
5156 | static void unit_modify_user_nft_set(Unit *u, bool add, NFTSetSource source, uint32_t element) { |
5157 | int r; | |
5158 | ||
5159 | assert(u); | |
5160 | ||
5161 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5162 | return; | |
5163 | ||
5164 | CGroupContext *c; | |
5165 | c = unit_get_cgroup_context(u); | |
5166 | if (!c) | |
5167 | return; | |
5168 | ||
5169 | if (!u->manager->fw_ctx) { | |
5170 | r = fw_ctx_new_full(&u->manager->fw_ctx, /* init_tables= */ false); | |
5171 | if (r < 0) | |
5172 | return; | |
5173 | ||
5174 | assert(u->manager->fw_ctx); | |
5175 | } | |
5176 | ||
5177 | FOREACH_ARRAY(nft_set, c->nft_set_context.sets, c->nft_set_context.n_sets) { | |
5178 | if (nft_set->source != source) | |
5179 | continue; | |
5180 | ||
5181 | r = nft_set_element_modify_any(u->manager->fw_ctx, add, nft_set->nfproto, nft_set->table, nft_set->set, &element, sizeof(element)); | |
5182 | if (r < 0) | |
5183 | log_warning_errno(r, "Failed to %s NFT set: family %s, table %s, set %s, ID %u, ignoring: %m", | |
5184 | add? "add" : "delete", nfproto_to_string(nft_set->nfproto), nft_set->table, nft_set->set, element); | |
5185 | else | |
5186 | log_debug("%s NFT set: family %s, table %s, set %s, ID %u", | |
5187 | add? "Added" : "Deleted", nfproto_to_string(nft_set->nfproto), nft_set->table, nft_set->set, element); | |
5188 | } | |
5189 | } | |
5190 | ||
00d9ef85 LP |
5191 | static void unit_unref_uid_internal( |
5192 | Unit *u, | |
5193 | uid_t *ref_uid, | |
5194 | bool destroy_now, | |
5195 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
5196 | ||
5197 | assert(u); | |
5198 | assert(ref_uid); | |
5199 | assert(_manager_unref_uid); | |
5200 | ||
5201 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
5202 | * gid_t are actually the same time, with the same validity rules. | |
5203 | * | |
5204 | * Drops a reference to UID/GID from a unit. */ | |
5205 | ||
5206 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
5207 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
5208 | ||
5209 | if (!uid_is_valid(*ref_uid)) | |
5210 | return; | |
5211 | ||
5212 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
5213 | *ref_uid = UID_INVALID; | |
5214 | } | |
5215 | ||
b90cf102 | 5216 | static void unit_unref_uid(Unit *u, bool destroy_now) { |
3bb48b19 TM |
5217 | assert(u); |
5218 | ||
5219 | unit_modify_user_nft_set(u, /* add = */ false, NFT_SET_SOURCE_USER, u->ref_uid); | |
5220 | ||
00d9ef85 LP |
5221 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); |
5222 | } | |
5223 | ||
b90cf102 | 5224 | static void unit_unref_gid(Unit *u, bool destroy_now) { |
3bb48b19 TM |
5225 | assert(u); |
5226 | ||
5227 | unit_modify_user_nft_set(u, /* add = */ false, NFT_SET_SOURCE_GROUP, u->ref_gid); | |
5228 | ||
00d9ef85 LP |
5229 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); |
5230 | } | |
5231 | ||
b90cf102 LP |
5232 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { |
5233 | assert(u); | |
5234 | ||
5235 | unit_unref_uid(u, destroy_now); | |
5236 | unit_unref_gid(u, destroy_now); | |
5237 | } | |
5238 | ||
00d9ef85 LP |
5239 | static int unit_ref_uid_internal( |
5240 | Unit *u, | |
5241 | uid_t *ref_uid, | |
5242 | uid_t uid, | |
5243 | bool clean_ipc, | |
5244 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
5245 | ||
5246 | int r; | |
5247 | ||
5248 | assert(u); | |
5249 | assert(ref_uid); | |
5250 | assert(uid_is_valid(uid)); | |
5251 | assert(_manager_ref_uid); | |
5252 | ||
5253 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
5254 | * are actually the same type, and have the same validity rules. | |
5255 | * | |
5256 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
5257 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
5258 | * drops to zero. */ | |
5259 | ||
5260 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
5261 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
5262 | ||
5263 | if (*ref_uid == uid) | |
5264 | return 0; | |
5265 | ||
5266 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
5267 | return -EBUSY; | |
5268 | ||
5269 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
5270 | if (r < 0) | |
5271 | return r; | |
5272 | ||
5273 | *ref_uid = uid; | |
5274 | return 1; | |
5275 | } | |
5276 | ||
b90cf102 | 5277 | static int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { |
00d9ef85 LP |
5278 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); |
5279 | } | |
5280 | ||
b90cf102 | 5281 | static int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { |
00d9ef85 LP |
5282 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); |
5283 | } | |
5284 | ||
5285 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
5286 | int r = 0, q = 0; | |
5287 | ||
5288 | assert(u); | |
5289 | ||
5290 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
5291 | ||
5292 | if (uid_is_valid(uid)) { | |
5293 | r = unit_ref_uid(u, uid, clean_ipc); | |
5294 | if (r < 0) | |
5295 | return r; | |
5296 | } | |
5297 | ||
5298 | if (gid_is_valid(gid)) { | |
5299 | q = unit_ref_gid(u, gid, clean_ipc); | |
5300 | if (q < 0) { | |
5301 | if (r > 0) | |
5302 | unit_unref_uid(u, false); | |
5303 | ||
5304 | return q; | |
5305 | } | |
5306 | } | |
5307 | ||
5308 | return r > 0 || q > 0; | |
5309 | } | |
5310 | ||
5311 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
5312 | ExecContext *c; | |
5313 | int r; | |
5314 | ||
5315 | assert(u); | |
5316 | ||
5317 | c = unit_get_exec_context(u); | |
5318 | ||
5319 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
5320 | if (r < 0) | |
5321 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
5322 | ||
3bb48b19 TM |
5323 | unit_modify_user_nft_set(u, /* add = */ true, NFT_SET_SOURCE_USER, uid); |
5324 | unit_modify_user_nft_set(u, /* add = */ true, NFT_SET_SOURCE_GROUP, gid); | |
5325 | ||
00d9ef85 LP |
5326 | return r; |
5327 | } | |
5328 | ||
00d9ef85 LP |
5329 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { |
5330 | int r; | |
5331 | ||
5332 | assert(u); | |
5333 | ||
5334 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
5335 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
5336 | * objects when no service references the UID/GID anymore. */ | |
5337 | ||
5338 | r = unit_ref_uid_gid(u, uid, gid); | |
5339 | if (r > 0) | |
37d0b962 | 5340 | unit_add_to_dbus_queue(u); |
00d9ef85 | 5341 | } |
4b58153d | 5342 | |
4b58153d LP |
5343 | int unit_acquire_invocation_id(Unit *u) { |
5344 | sd_id128_t id; | |
5345 | int r; | |
5346 | ||
5347 | assert(u); | |
5348 | ||
5349 | r = sd_id128_randomize(&id); | |
5350 | if (r < 0) | |
5351 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
5352 | ||
5353 | r = unit_set_invocation_id(u, id); | |
5354 | if (r < 0) | |
5355 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
5356 | ||
af92c603 | 5357 | unit_add_to_dbus_queue(u); |
4b58153d LP |
5358 | return 0; |
5359 | } | |
f0d47797 | 5360 | |
1ad6e8b3 | 5361 | int unit_set_exec_params(Unit *u, ExecParameters *p) { |
bb5232b6 | 5362 | const char *confirm_spawn; |
1ad6e8b3 LP |
5363 | int r; |
5364 | ||
7960b0c7 LP |
5365 | assert(u); |
5366 | assert(p); | |
f0d47797 | 5367 | |
004c7f16 | 5368 | /* Copy parameters from manager */ |
1ad6e8b3 LP |
5369 | r = manager_get_effective_environment(u->manager, &p->environment); |
5370 | if (r < 0) | |
5371 | return r; | |
5372 | ||
170d978b LP |
5373 | p->runtime_scope = u->manager->runtime_scope; |
5374 | ||
bb5232b6 LB |
5375 | confirm_spawn = manager_get_confirm_spawn(u->manager); |
5376 | if (confirm_spawn) { | |
5377 | p->confirm_spawn = strdup(confirm_spawn); | |
5378 | if (!p->confirm_spawn) | |
5379 | return -ENOMEM; | |
5380 | } | |
5381 | ||
004c7f16 LP |
5382 | p->cgroup_supported = u->manager->cgroup_supported; |
5383 | p->prefix = u->manager->prefix; | |
5384 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
5385 | ||
5238e957 | 5386 | /* Copy parameters from unit */ |
7960b0c7 | 5387 | p->cgroup_path = u->cgroup_path; |
1d9cc876 | 5388 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
1ad6e8b3 | 5389 | |
2ad591a3 LP |
5390 | p->received_credentials_directory = u->manager->received_credentials_directory; |
5391 | p->received_encrypted_credentials_directory = u->manager->received_encrypted_credentials_directory; | |
bb0c0d6f | 5392 | |
154eb43f LB |
5393 | p->shall_confirm_spawn = !!u->manager->confirm_spawn; |
5394 | ||
5395 | p->fallback_smack_process_label = u->manager->defaults.smack_process_label; | |
5396 | ||
5397 | if (u->manager->restrict_fs && p->bpf_outer_map_fd < 0) { | |
5398 | int fd = lsm_bpf_map_restrict_fs_fd(u); | |
5399 | if (fd < 0) | |
5400 | return fd; | |
5401 | ||
5402 | p->bpf_outer_map_fd = fd; | |
5403 | } | |
5404 | ||
b646fc32 LB |
5405 | p->user_lookup_fd = u->manager->user_lookup_fds[1]; |
5406 | ||
5407 | p->cgroup_id = u->cgroup_id; | |
5408 | p->invocation_id = u->invocation_id; | |
5409 | sd_id128_to_string(p->invocation_id, p->invocation_id_string); | |
5410 | p->unit_id = strdup(u->id); | |
5411 | if (!p->unit_id) | |
5412 | return -ENOMEM; | |
154eb43f | 5413 | |
1ad6e8b3 | 5414 | return 0; |
f0d47797 | 5415 | } |
a79279c7 | 5416 | |
4775b55d LP |
5417 | int unit_fork_helper_process(Unit *u, const char *name, PidRef *ret) { |
5418 | pid_t pid; | |
a79279c7 LP |
5419 | int r; |
5420 | ||
5421 | assert(u); | |
5422 | assert(ret); | |
5423 | ||
5424 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
5425 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
5426 | ||
5427 | (void) unit_realize_cgroup(u); | |
5428 | ||
4775b55d LP |
5429 | r = safe_fork(name, FORK_REOPEN_LOG|FORK_DEATHSIG, &pid); |
5430 | if (r < 0) | |
5431 | return r; | |
5432 | if (r > 0) { | |
5433 | _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL; | |
5434 | int q; | |
5435 | ||
5436 | /* Parent */ | |
5437 | ||
5438 | q = pidref_set_pid(&pidref, pid); | |
5439 | if (q < 0) | |
5440 | return q; | |
5441 | ||
5442 | *ret = TAKE_PIDREF(pidref); | |
4c253ed1 | 5443 | return r; |
4775b55d LP |
5444 | } |
5445 | ||
5446 | /* Child */ | |
a79279c7 | 5447 | |
9c274488 LP |
5448 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE); |
5449 | (void) ignore_signals(SIGPIPE); | |
a79279c7 | 5450 | |
4c253ed1 LP |
5451 | if (u->cgroup_path) { |
5452 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
5453 | if (r < 0) { | |
6178e2f8 | 5454 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", empty_to_root(u->cgroup_path)); |
4c253ed1 | 5455 | _exit(EXIT_CGROUP); |
a79279c7 | 5456 | } |
a79279c7 LP |
5457 | } |
5458 | ||
4c253ed1 | 5459 | return 0; |
a79279c7 | 5460 | } |
c999cf38 | 5461 | |
4775b55d LP |
5462 | int unit_fork_and_watch_rm_rf(Unit *u, char **paths, PidRef *ret_pid) { |
5463 | _cleanup_(pidref_done) PidRef pid = PIDREF_NULL; | |
810ef318 YW |
5464 | int r; |
5465 | ||
5466 | assert(u); | |
5467 | assert(ret_pid); | |
5468 | ||
5469 | r = unit_fork_helper_process(u, "(sd-rmrf)", &pid); | |
5470 | if (r < 0) | |
5471 | return r; | |
5472 | if (r == 0) { | |
5473 | int ret = EXIT_SUCCESS; | |
810ef318 YW |
5474 | |
5475 | STRV_FOREACH(i, paths) { | |
5476 | r = rm_rf(*i, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_MISSING_OK); | |
5477 | if (r < 0) { | |
5478 | log_error_errno(r, "Failed to remove '%s': %m", *i); | |
5479 | ret = EXIT_FAILURE; | |
5480 | } | |
5481 | } | |
5482 | ||
5483 | _exit(ret); | |
5484 | } | |
5485 | ||
495e75ed | 5486 | r = unit_watch_pidref(u, &pid, /* exclusive= */ true); |
810ef318 YW |
5487 | if (r < 0) |
5488 | return r; | |
5489 | ||
4775b55d | 5490 | *ret_pid = TAKE_PIDREF(pid); |
810ef318 YW |
5491 | return 0; |
5492 | } | |
5493 | ||
15ed3c3a LP |
5494 | static void unit_update_dependency_mask(Hashmap *deps, Unit *other, UnitDependencyInfo di) { |
5495 | assert(deps); | |
c999cf38 LP |
5496 | assert(other); |
5497 | ||
15ed3c3a | 5498 | if (di.origin_mask == 0 && di.destination_mask == 0) |
c999cf38 | 5499 | /* No bit set anymore, let's drop the whole entry */ |
15ed3c3a LP |
5500 | assert_se(hashmap_remove(deps, other)); |
5501 | else | |
c999cf38 | 5502 | /* Mask was reduced, let's update the entry */ |
15ed3c3a | 5503 | assert_se(hashmap_update(deps, other, di.data) == 0); |
c999cf38 LP |
5504 | } |
5505 | ||
5506 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
15ed3c3a | 5507 | Hashmap *deps; |
c999cf38 LP |
5508 | assert(u); |
5509 | ||
5510 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5511 | ||
5512 | if (mask == 0) | |
5513 | return; | |
5514 | ||
15ed3c3a | 5515 | HASHMAP_FOREACH(deps, u->dependencies) { |
c999cf38 LP |
5516 | bool done; |
5517 | ||
5518 | do { | |
5519 | UnitDependencyInfo di; | |
5520 | Unit *other; | |
c999cf38 LP |
5521 | |
5522 | done = true; | |
5523 | ||
15ed3c3a LP |
5524 | HASHMAP_FOREACH_KEY(di.data, other, deps) { |
5525 | Hashmap *other_deps; | |
5526 | ||
1d6cc5d0 | 5527 | if (FLAGS_SET(~mask, di.origin_mask)) |
c999cf38 | 5528 | continue; |
15ed3c3a | 5529 | |
c999cf38 | 5530 | di.origin_mask &= ~mask; |
15ed3c3a | 5531 | unit_update_dependency_mask(deps, other, di); |
c999cf38 | 5532 | |
defe63b0 LP |
5533 | /* We updated the dependency from our unit to the other unit now. But most |
5534 | * dependencies imply a reverse dependency. Hence, let's delete that one | |
5535 | * too. For that we go through all dependency types on the other unit and | |
5536 | * delete all those which point to us and have the right mask set. */ | |
c999cf38 | 5537 | |
15ed3c3a | 5538 | HASHMAP_FOREACH(other_deps, other->dependencies) { |
c999cf38 LP |
5539 | UnitDependencyInfo dj; |
5540 | ||
15ed3c3a | 5541 | dj.data = hashmap_get(other_deps, u); |
1d6cc5d0 | 5542 | if (FLAGS_SET(~mask, dj.destination_mask)) |
c999cf38 | 5543 | continue; |
c999cf38 | 5544 | |
15ed3c3a LP |
5545 | dj.destination_mask &= ~mask; |
5546 | unit_update_dependency_mask(other_deps, u, dj); | |
c999cf38 LP |
5547 | } |
5548 | ||
5549 | unit_add_to_gc_queue(other); | |
5550 | ||
156ba52b YW |
5551 | /* The unit 'other' may not be wanted by the unit 'u'. */ |
5552 | unit_submit_to_stop_when_unneeded_queue(other); | |
5553 | ||
c999cf38 LP |
5554 | done = false; |
5555 | break; | |
5556 | } | |
5557 | ||
5558 | } while (!done); | |
5559 | } | |
5560 | } | |
d3070fbd | 5561 | |
2f8c48b6 AZ |
5562 | static int unit_get_invocation_path(Unit *u, char **ret) { |
5563 | char *p; | |
5564 | int r; | |
5565 | ||
5566 | assert(u); | |
5567 | assert(ret); | |
5568 | ||
5569 | if (MANAGER_IS_SYSTEM(u->manager)) | |
5570 | p = strjoin("/run/systemd/units/invocation:", u->id); | |
5571 | else { | |
5572 | _cleanup_free_ char *user_path = NULL; | |
5573 | r = xdg_user_runtime_dir(&user_path, "/systemd/units/invocation:"); | |
5574 | if (r < 0) | |
5575 | return r; | |
5576 | p = strjoin(user_path, u->id); | |
5577 | } | |
5578 | ||
5579 | if (!p) | |
5580 | return -ENOMEM; | |
5581 | ||
5582 | *ret = p; | |
5583 | return 0; | |
5584 | } | |
5585 | ||
d3070fbd | 5586 | static int unit_export_invocation_id(Unit *u) { |
2f8c48b6 | 5587 | _cleanup_free_ char *p = NULL; |
d3070fbd LP |
5588 | int r; |
5589 | ||
5590 | assert(u); | |
5591 | ||
5592 | if (u->exported_invocation_id) | |
5593 | return 0; | |
5594 | ||
5595 | if (sd_id128_is_null(u->invocation_id)) | |
5596 | return 0; | |
5597 | ||
2f8c48b6 AZ |
5598 | r = unit_get_invocation_path(u, &p); |
5599 | if (r < 0) | |
5600 | return log_unit_debug_errno(u, r, "Failed to get invocation path: %m"); | |
5601 | ||
a3f5fd96 | 5602 | r = symlink_atomic_label(u->invocation_id_string, p); |
d3070fbd LP |
5603 | if (r < 0) |
5604 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5605 | ||
5606 | u->exported_invocation_id = true; | |
5607 | return 0; | |
5608 | } | |
5609 | ||
5610 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5611 | const char *p; | |
5612 | char buf[2]; | |
5613 | int r; | |
5614 | ||
5615 | assert(u); | |
5616 | assert(c); | |
5617 | ||
5618 | if (u->exported_log_level_max) | |
5619 | return 0; | |
5620 | ||
5621 | if (c->log_level_max < 0) | |
5622 | return 0; | |
5623 | ||
5624 | assert(c->log_level_max <= 7); | |
5625 | ||
5626 | buf[0] = '0' + c->log_level_max; | |
5627 | buf[1] = 0; | |
5628 | ||
5629 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5630 | r = symlink_atomic(buf, p); | |
5631 | if (r < 0) | |
5632 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5633 | ||
5634 | u->exported_log_level_max = true; | |
5635 | return 0; | |
5636 | } | |
5637 | ||
5638 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
254d1313 | 5639 | _cleanup_close_ int fd = -EBADF; |
d3070fbd LP |
5640 | struct iovec *iovec; |
5641 | const char *p; | |
5642 | char *pattern; | |
5643 | le64_t *sizes; | |
5644 | ssize_t n; | |
d3070fbd LP |
5645 | int r; |
5646 | ||
5647 | if (u->exported_log_extra_fields) | |
5648 | return 0; | |
5649 | ||
5650 | if (c->n_log_extra_fields <= 0) | |
5651 | return 0; | |
5652 | ||
5653 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5654 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5655 | ||
12375b95 | 5656 | for (size_t i = 0; i < c->n_log_extra_fields; i++) { |
d3070fbd LP |
5657 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); |
5658 | ||
5659 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5660 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5661 | } | |
5662 | ||
5663 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5664 | pattern = strjoina(p, ".XXXXXX"); | |
5665 | ||
5666 | fd = mkostemp_safe(pattern); | |
5667 | if (fd < 0) | |
5668 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5669 | ||
5670 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5671 | if (n < 0) { | |
5672 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5673 | goto fail; | |
5674 | } | |
5675 | ||
5676 | (void) fchmod(fd, 0644); | |
5677 | ||
5678 | if (rename(pattern, p) < 0) { | |
5679 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5680 | goto fail; | |
5681 | } | |
5682 | ||
5683 | u->exported_log_extra_fields = true; | |
5684 | return 0; | |
5685 | ||
5686 | fail: | |
5687 | (void) unlink(pattern); | |
5688 | return r; | |
5689 | } | |
5690 | ||
5ac1530e | 5691 | static int unit_export_log_ratelimit_interval(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5692 | _cleanup_free_ char *buf = NULL; |
5693 | const char *p; | |
5694 | int r; | |
5695 | ||
5696 | assert(u); | |
5697 | assert(c); | |
5698 | ||
5ac1530e | 5699 | if (u->exported_log_ratelimit_interval) |
90fc172e AZ |
5700 | return 0; |
5701 | ||
5ac1530e | 5702 | if (c->log_ratelimit_interval_usec == 0) |
90fc172e AZ |
5703 | return 0; |
5704 | ||
5705 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5706 | ||
5ac1530e | 5707 | if (asprintf(&buf, "%" PRIu64, c->log_ratelimit_interval_usec) < 0) |
90fc172e AZ |
5708 | return log_oom(); |
5709 | ||
5710 | r = symlink_atomic(buf, p); | |
5711 | if (r < 0) | |
5712 | return log_unit_debug_errno(u, r, "Failed to create log rate limit interval symlink %s: %m", p); | |
5713 | ||
5ac1530e | 5714 | u->exported_log_ratelimit_interval = true; |
90fc172e AZ |
5715 | return 0; |
5716 | } | |
5717 | ||
5ac1530e | 5718 | static int unit_export_log_ratelimit_burst(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5719 | _cleanup_free_ char *buf = NULL; |
5720 | const char *p; | |
5721 | int r; | |
5722 | ||
5723 | assert(u); | |
5724 | assert(c); | |
5725 | ||
5ac1530e | 5726 | if (u->exported_log_ratelimit_burst) |
90fc172e AZ |
5727 | return 0; |
5728 | ||
5ac1530e | 5729 | if (c->log_ratelimit_burst == 0) |
90fc172e AZ |
5730 | return 0; |
5731 | ||
5732 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5733 | ||
5ac1530e | 5734 | if (asprintf(&buf, "%u", c->log_ratelimit_burst) < 0) |
90fc172e AZ |
5735 | return log_oom(); |
5736 | ||
5737 | r = symlink_atomic(buf, p); | |
5738 | if (r < 0) | |
5739 | return log_unit_debug_errno(u, r, "Failed to create log rate limit burst symlink %s: %m", p); | |
5740 | ||
5ac1530e | 5741 | u->exported_log_ratelimit_burst = true; |
90fc172e AZ |
5742 | return 0; |
5743 | } | |
5744 | ||
d3070fbd LP |
5745 | void unit_export_state_files(Unit *u) { |
5746 | const ExecContext *c; | |
5747 | ||
5748 | assert(u); | |
5749 | ||
5750 | if (!u->id) | |
5751 | return; | |
5752 | ||
638cece4 | 5753 | if (MANAGER_IS_TEST_RUN(u->manager)) |
8f632531 LP |
5754 | return; |
5755 | ||
d3070fbd LP |
5756 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5757 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5758 | * the IPC system itself and PID 1 also log to the journal. | |
5759 | * | |
5760 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5761 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5762 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5763 | * namespace at least. | |
5764 | * | |
5765 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5766 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5767 | * them with one. */ | |
5768 | ||
5769 | (void) unit_export_invocation_id(u); | |
5770 | ||
2f8c48b6 AZ |
5771 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5772 | return; | |
5773 | ||
d3070fbd LP |
5774 | c = unit_get_exec_context(u); |
5775 | if (c) { | |
5776 | (void) unit_export_log_level_max(u, c); | |
5777 | (void) unit_export_log_extra_fields(u, c); | |
5ac1530e ZJS |
5778 | (void) unit_export_log_ratelimit_interval(u, c); |
5779 | (void) unit_export_log_ratelimit_burst(u, c); | |
d3070fbd LP |
5780 | } |
5781 | } | |
5782 | ||
5783 | void unit_unlink_state_files(Unit *u) { | |
5784 | const char *p; | |
5785 | ||
5786 | assert(u); | |
5787 | ||
5788 | if (!u->id) | |
5789 | return; | |
5790 | ||
d3070fbd LP |
5791 | /* Undoes the effect of unit_export_state() */ |
5792 | ||
5793 | if (u->exported_invocation_id) { | |
2f8c48b6 AZ |
5794 | _cleanup_free_ char *invocation_path = NULL; |
5795 | int r = unit_get_invocation_path(u, &invocation_path); | |
5796 | if (r >= 0) { | |
5797 | (void) unlink(invocation_path); | |
5798 | u->exported_invocation_id = false; | |
5799 | } | |
d3070fbd LP |
5800 | } |
5801 | ||
2f8c48b6 AZ |
5802 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5803 | return; | |
5804 | ||
d3070fbd LP |
5805 | if (u->exported_log_level_max) { |
5806 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5807 | (void) unlink(p); | |
5808 | ||
5809 | u->exported_log_level_max = false; | |
5810 | } | |
5811 | ||
5812 | if (u->exported_log_extra_fields) { | |
5813 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5814 | (void) unlink(p); | |
5815 | ||
5816 | u->exported_log_extra_fields = false; | |
5817 | } | |
90fc172e | 5818 | |
5ac1530e | 5819 | if (u->exported_log_ratelimit_interval) { |
90fc172e AZ |
5820 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); |
5821 | (void) unlink(p); | |
5822 | ||
5ac1530e | 5823 | u->exported_log_ratelimit_interval = false; |
90fc172e AZ |
5824 | } |
5825 | ||
5ac1530e | 5826 | if (u->exported_log_ratelimit_burst) { |
90fc172e AZ |
5827 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); |
5828 | (void) unlink(p); | |
5829 | ||
5ac1530e | 5830 | u->exported_log_ratelimit_burst = false; |
90fc172e | 5831 | } |
d3070fbd | 5832 | } |
5afe510c | 5833 | |
3c7416b6 LP |
5834 | int unit_prepare_exec(Unit *u) { |
5835 | int r; | |
5836 | ||
5837 | assert(u); | |
5838 | ||
fab34748 KL |
5839 | /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable. |
5840 | * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */ | |
5841 | r = bpf_firewall_load_custom(u); | |
5842 | if (r < 0) | |
5843 | return r; | |
5844 | ||
3c7416b6 LP |
5845 | /* Prepares everything so that we can fork of a process for this unit */ |
5846 | ||
5847 | (void) unit_realize_cgroup(u); | |
5848 | ||
5849 | if (u->reset_accounting) { | |
9b2559a1 | 5850 | (void) unit_reset_accounting(u); |
3c7416b6 LP |
5851 | u->reset_accounting = false; |
5852 | } | |
5853 | ||
5854 | unit_export_state_files(u); | |
5855 | ||
5856 | r = unit_setup_exec_runtime(u); | |
5857 | if (r < 0) | |
5858 | return r; | |
5859 | ||
3c7416b6 LP |
5860 | return 0; |
5861 | } | |
5862 | ||
4c425434 LP |
5863 | static bool ignore_leftover_process(const char *comm) { |
5864 | return comm && comm[0] == '('; /* Most likely our own helper process (PAM?), ignore */ | |
5865 | } | |
5866 | ||
4d1b2df1 | 5867 | int unit_log_leftover_process_start(const PidRef *pid, int sig, void *userdata) { |
a4634b21 LP |
5868 | _cleanup_free_ char *comm = NULL; |
5869 | ||
4d1b2df1 LP |
5870 | assert(pidref_is_set(pid)); |
5871 | ||
5872 | (void) pidref_get_comm(pid, &comm); | |
a4634b21 | 5873 | |
4c425434 | 5874 | if (ignore_leftover_process(comm)) |
c53d2d54 | 5875 | return 0; |
a4634b21 | 5876 | |
4c425434 LP |
5877 | /* During start we print a warning */ |
5878 | ||
a4634b21 LP |
5879 | log_unit_warning(userdata, |
5880 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5881 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
4d1b2df1 | 5882 | pid->pid, strna(comm)); |
c53d2d54 DB |
5883 | |
5884 | return 1; | |
a4634b21 LP |
5885 | } |
5886 | ||
4d1b2df1 | 5887 | int unit_log_leftover_process_stop(const PidRef *pid, int sig, void *userdata) { |
4c425434 LP |
5888 | _cleanup_free_ char *comm = NULL; |
5889 | ||
4d1b2df1 LP |
5890 | assert(pidref_is_set(pid)); |
5891 | ||
5892 | (void) pidref_get_comm(pid, &comm); | |
4c425434 LP |
5893 | |
5894 | if (ignore_leftover_process(comm)) | |
5895 | return 0; | |
5896 | ||
5897 | /* During stop we only print an informational message */ | |
5898 | ||
5899 | log_unit_info(userdata, | |
5900 | "Unit process " PID_FMT " (%s) remains running after unit stopped.", | |
4d1b2df1 | 5901 | pid->pid, strna(comm)); |
4c425434 LP |
5902 | |
5903 | return 1; | |
5904 | } | |
5905 | ||
5906 | int unit_warn_leftover_processes(Unit *u, cg_kill_log_func_t log_func) { | |
a4634b21 LP |
5907 | assert(u); |
5908 | ||
5909 | (void) unit_pick_cgroup_path(u); | |
5910 | ||
5911 | if (!u->cgroup_path) | |
c53d2d54 | 5912 | return 0; |
a4634b21 | 5913 | |
bd1791b5 LP |
5914 | return cg_kill_recursive( |
5915 | u->cgroup_path, | |
5916 | /* sig= */ 0, | |
5917 | /* flags= */ 0, | |
5918 | /* set= */ NULL, | |
5919 | log_func, | |
5920 | u); | |
a4634b21 LP |
5921 | } |
5922 | ||
bb2c7685 LP |
5923 | bool unit_needs_console(Unit *u) { |
5924 | ExecContext *ec; | |
5925 | UnitActiveState state; | |
5926 | ||
5927 | assert(u); | |
5928 | ||
5929 | state = unit_active_state(u); | |
5930 | ||
5931 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5932 | return false; | |
5933 | ||
5934 | if (UNIT_VTABLE(u)->needs_console) | |
5935 | return UNIT_VTABLE(u)->needs_console(u); | |
5936 | ||
5937 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5938 | ec = unit_get_exec_context(u); | |
5939 | if (!ec) | |
5940 | return false; | |
5941 | ||
5942 | return exec_context_may_touch_console(ec); | |
5943 | } | |
5944 | ||
495e75ed | 5945 | int unit_pid_attachable(Unit *u, PidRef *pid, sd_bus_error *error) { |
6592b975 LP |
5946 | int r; |
5947 | ||
5948 | assert(u); | |
5949 | ||
5950 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5951 | * and not a kernel thread either */ | |
5952 | ||
5953 | /* First, a simple range check */ | |
495e75ed LP |
5954 | if (!pidref_is_set(pid)) |
5955 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier is not valid."); | |
6592b975 LP |
5956 | |
5957 | /* Some extra safety check */ | |
a7a87769 | 5958 | if (pid->pid == 1 || pidref_is_self(pid)) |
495e75ed | 5959 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager process, refusing.", pid->pid); |
6592b975 LP |
5960 | |
5961 | /* Don't even begin to bother with kernel threads */ | |
fc87713b | 5962 | r = pidref_is_kernel_thread(pid); |
6592b975 | 5963 | if (r == -ESRCH) |
495e75ed | 5964 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid->pid); |
6592b975 | 5965 | if (r < 0) |
495e75ed | 5966 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid->pid); |
6592b975 | 5967 | if (r > 0) |
495e75ed | 5968 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid->pid); |
6592b975 LP |
5969 | |
5970 | return 0; | |
5971 | } | |
5972 | ||
523ee2d4 LP |
5973 | void unit_log_success(Unit *u) { |
5974 | assert(u); | |
5975 | ||
edf2ee22 JM |
5976 | /* Let's show message "Deactivated successfully" in debug mode (when manager is user) rather than in info mode. |
5977 | * This message has low information value for regular users and it might be a bit overwhelming on a system with | |
5978 | * a lot of devices. */ | |
5979 | log_unit_struct(u, | |
5980 | MANAGER_IS_USER(u->manager) ? LOG_DEBUG : LOG_INFO, | |
c2503e35 RH |
5981 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR, |
5982 | LOG_UNIT_INVOCATION_ID(u), | |
5983 | LOG_UNIT_MESSAGE(u, "Deactivated successfully.")); | |
523ee2d4 LP |
5984 | } |
5985 | ||
7c047d74 LP |
5986 | void unit_log_failure(Unit *u, const char *result) { |
5987 | assert(u); | |
5988 | assert(result); | |
5989 | ||
c2503e35 RH |
5990 | log_unit_struct(u, LOG_WARNING, |
5991 | "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR, | |
5992 | LOG_UNIT_INVOCATION_ID(u), | |
5993 | LOG_UNIT_MESSAGE(u, "Failed with result '%s'.", result), | |
5994 | "UNIT_RESULT=%s", result); | |
7c047d74 LP |
5995 | } |
5996 | ||
31cd5f63 AZ |
5997 | void unit_log_skip(Unit *u, const char *result) { |
5998 | assert(u); | |
5999 | assert(result); | |
6000 | ||
c2503e35 RH |
6001 | log_unit_struct(u, LOG_INFO, |
6002 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR, | |
6003 | LOG_UNIT_INVOCATION_ID(u), | |
6004 | LOG_UNIT_MESSAGE(u, "Skipped due to '%s'.", result), | |
6005 | "UNIT_RESULT=%s", result); | |
31cd5f63 AZ |
6006 | } |
6007 | ||
91bbd9b7 LP |
6008 | void unit_log_process_exit( |
6009 | Unit *u, | |
91bbd9b7 LP |
6010 | const char *kind, |
6011 | const char *command, | |
5cc2cd1c | 6012 | bool success, |
91bbd9b7 LP |
6013 | int code, |
6014 | int status) { | |
6015 | ||
5cc2cd1c ZJS |
6016 | int level; |
6017 | ||
91bbd9b7 LP |
6018 | assert(u); |
6019 | assert(kind); | |
6020 | ||
5cc2cd1c ZJS |
6021 | /* If this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure |
6022 | * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption | |
6023 | * that the service already logged the reason at a higher log level on its own. Otherwise, make it a | |
6024 | * WARNING. */ | |
6025 | if (success) | |
6026 | level = LOG_DEBUG; | |
6027 | else if (code == CLD_EXITED) | |
6028 | level = LOG_NOTICE; | |
6029 | else | |
91bbd9b7 LP |
6030 | level = LOG_WARNING; |
6031 | ||
c2503e35 RH |
6032 | log_unit_struct(u, level, |
6033 | "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR, | |
58441bc1 | 6034 | LOG_UNIT_MESSAGE(u, "%s exited, code=%s, status=%i/%s%s", |
c2503e35 RH |
6035 | kind, |
6036 | sigchld_code_to_string(code), status, | |
6037 | strna(code == CLD_EXITED | |
6038 | ? exit_status_to_string(status, EXIT_STATUS_FULL) | |
58441bc1 ZJS |
6039 | : signal_to_string(status)), |
6040 | success ? " (success)" : ""), | |
c2503e35 RH |
6041 | "EXIT_CODE=%s", sigchld_code_to_string(code), |
6042 | "EXIT_STATUS=%i", status, | |
6043 | "COMMAND=%s", strna(command), | |
6044 | LOG_UNIT_INVOCATION_ID(u)); | |
91bbd9b7 LP |
6045 | } |
6046 | ||
7af67e9a LP |
6047 | int unit_exit_status(Unit *u) { |
6048 | assert(u); | |
6049 | ||
6050 | /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range | |
6051 | * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA | |
6052 | * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main | |
6053 | * service process has exited abnormally (signal/coredump). */ | |
6054 | ||
6055 | if (!UNIT_VTABLE(u)->exit_status) | |
6056 | return -EOPNOTSUPP; | |
6057 | ||
6058 | return UNIT_VTABLE(u)->exit_status(u); | |
6059 | } | |
6060 | ||
6061 | int unit_failure_action_exit_status(Unit *u) { | |
6062 | int r; | |
6063 | ||
6064 | assert(u); | |
6065 | ||
6066 | /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */ | |
6067 | ||
6068 | if (u->failure_action_exit_status >= 0) | |
6069 | return u->failure_action_exit_status; | |
6070 | ||
6071 | r = unit_exit_status(u); | |
6072 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
6073 | return 255; | |
6074 | ||
6075 | return r; | |
6076 | } | |
6077 | ||
6078 | int unit_success_action_exit_status(Unit *u) { | |
6079 | int r; | |
6080 | ||
6081 | assert(u); | |
6082 | ||
6083 | /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */ | |
6084 | ||
6085 | if (u->success_action_exit_status >= 0) | |
6086 | return u->success_action_exit_status; | |
6087 | ||
6088 | r = unit_exit_status(u); | |
6089 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
6090 | return 255; | |
6091 | ||
6092 | return r; | |
6093 | } | |
6094 | ||
a4191c9f LP |
6095 | int unit_test_trigger_loaded(Unit *u) { |
6096 | Unit *trigger; | |
6097 | ||
6098 | /* Tests whether the unit to trigger is loaded */ | |
6099 | ||
6100 | trigger = UNIT_TRIGGER(u); | |
6101 | if (!trigger) | |
e7b9f4d9 ZJS |
6102 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
6103 | "Refusing to start, no unit to trigger."); | |
a4191c9f | 6104 | if (trigger->load_state != UNIT_LOADED) |
e7b9f4d9 ZJS |
6105 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
6106 | "Refusing to start, unit %s to trigger not loaded.", trigger->id); | |
a4191c9f LP |
6107 | |
6108 | return 0; | |
6109 | } | |
6110 | ||
bb0c0d6f LP |
6111 | void unit_destroy_runtime_data(Unit *u, const ExecContext *context) { |
6112 | assert(u); | |
6113 | assert(context); | |
6114 | ||
1ba84fef LP |
6115 | /* EXEC_PRESERVE_RESTART is handled via unit_release_resources()! */ |
6116 | if (context->runtime_directory_preserve_mode == EXEC_PRESERVE_NO) | |
95939aed | 6117 | exec_context_destroy_runtime_directory(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME]); |
bb0c0d6f | 6118 | |
1e122561 | 6119 | exec_context_destroy_credentials(u); |
b9f976fb | 6120 | exec_context_destroy_mount_ns_dir(u); |
95939aed YW |
6121 | } |
6122 | ||
380dc8b0 LP |
6123 | int unit_clean(Unit *u, ExecCleanMask mask) { |
6124 | UnitActiveState state; | |
6125 | ||
6126 | assert(u); | |
6127 | ||
6128 | /* Special return values: | |
6129 | * | |
6130 | * -EOPNOTSUPP → cleaning not supported for this unit type | |
6131 | * -EUNATCH → cleaning not defined for this resource type | |
6132 | * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has | |
6133 | * a job queued or similar | |
6134 | */ | |
6135 | ||
6136 | if (!UNIT_VTABLE(u)->clean) | |
6137 | return -EOPNOTSUPP; | |
6138 | ||
6139 | if (mask == 0) | |
6140 | return -EUNATCH; | |
6141 | ||
6142 | if (u->load_state != UNIT_LOADED) | |
6143 | return -EBUSY; | |
6144 | ||
6145 | if (u->job) | |
6146 | return -EBUSY; | |
6147 | ||
6148 | state = unit_active_state(u); | |
4f06325c | 6149 | if (state != UNIT_INACTIVE) |
380dc8b0 LP |
6150 | return -EBUSY; |
6151 | ||
6152 | return UNIT_VTABLE(u)->clean(u, mask); | |
6153 | } | |
6154 | ||
6155 | int unit_can_clean(Unit *u, ExecCleanMask *ret) { | |
6156 | assert(u); | |
6157 | ||
6158 | if (!UNIT_VTABLE(u)->clean || | |
6159 | u->load_state != UNIT_LOADED) { | |
6160 | *ret = 0; | |
6161 | return 0; | |
6162 | } | |
6163 | ||
6164 | /* When the clean() method is set, can_clean() really should be set too */ | |
6165 | assert(UNIT_VTABLE(u)->can_clean); | |
6166 | ||
6167 | return UNIT_VTABLE(u)->can_clean(u, ret); | |
6168 | } | |
6169 | ||
d9e45bc3 MS |
6170 | bool unit_can_freeze(Unit *u) { |
6171 | assert(u); | |
6172 | ||
6173 | if (UNIT_VTABLE(u)->can_freeze) | |
6174 | return UNIT_VTABLE(u)->can_freeze(u); | |
6175 | ||
6176 | return UNIT_VTABLE(u)->freeze; | |
6177 | } | |
6178 | ||
6179 | void unit_frozen(Unit *u) { | |
6180 | assert(u); | |
6181 | ||
6182 | u->freezer_state = FREEZER_FROZEN; | |
6183 | ||
3d19e122 | 6184 | bus_unit_send_pending_freezer_message(u, false); |
d9e45bc3 MS |
6185 | } |
6186 | ||
6187 | void unit_thawed(Unit *u) { | |
6188 | assert(u); | |
6189 | ||
6190 | u->freezer_state = FREEZER_RUNNING; | |
6191 | ||
3d19e122 | 6192 | bus_unit_send_pending_freezer_message(u, false); |
d9e45bc3 MS |
6193 | } |
6194 | ||
6195 | static int unit_freezer_action(Unit *u, FreezerAction action) { | |
6196 | UnitActiveState s; | |
6197 | int (*method)(Unit*); | |
6198 | int r; | |
6199 | ||
6200 | assert(u); | |
6201 | assert(IN_SET(action, FREEZER_FREEZE, FREEZER_THAW)); | |
6202 | ||
6203 | method = action == FREEZER_FREEZE ? UNIT_VTABLE(u)->freeze : UNIT_VTABLE(u)->thaw; | |
6204 | if (!method || !cg_freezer_supported()) | |
6205 | return -EOPNOTSUPP; | |
6206 | ||
6207 | if (u->job) | |
6208 | return -EBUSY; | |
6209 | ||
6210 | if (u->load_state != UNIT_LOADED) | |
6211 | return -EHOSTDOWN; | |
6212 | ||
6213 | s = unit_active_state(u); | |
6214 | if (s != UNIT_ACTIVE) | |
6215 | return -EHOSTDOWN; | |
6216 | ||
3d19e122 | 6217 | if ((IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_THAWING) && action == FREEZER_FREEZE) || |
6218 | (u->freezer_state == FREEZER_THAWING && action == FREEZER_THAW)) | |
d9e45bc3 MS |
6219 | return -EALREADY; |
6220 | ||
6221 | r = method(u); | |
6222 | if (r <= 0) | |
6223 | return r; | |
6224 | ||
d171e72e YW |
6225 | assert(IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_THAWING)); |
6226 | ||
d9e45bc3 MS |
6227 | return 1; |
6228 | } | |
6229 | ||
6230 | int unit_freeze(Unit *u) { | |
6231 | return unit_freezer_action(u, FREEZER_FREEZE); | |
6232 | } | |
6233 | ||
6234 | int unit_thaw(Unit *u) { | |
6235 | return unit_freezer_action(u, FREEZER_THAW); | |
6236 | } | |
6237 | ||
6238 | /* Wrappers around low-level cgroup freezer operations common for service and scope units */ | |
6239 | int unit_freeze_vtable_common(Unit *u) { | |
6240 | return unit_cgroup_freezer_action(u, FREEZER_FREEZE); | |
6241 | } | |
6242 | ||
6243 | int unit_thaw_vtable_common(Unit *u) { | |
6244 | return unit_cgroup_freezer_action(u, FREEZER_THAW); | |
6245 | } | |
6246 | ||
6e548561 | 6247 | Condition *unit_find_failed_condition(Unit *u) { |
03677889 | 6248 | Condition *failed_trigger = NULL; |
6e548561 DDM |
6249 | bool has_succeeded_trigger = false; |
6250 | ||
6251 | if (u->condition_result) | |
6252 | return NULL; | |
6253 | ||
6254 | LIST_FOREACH(conditions, c, u->conditions) | |
6255 | if (c->trigger) { | |
6256 | if (c->result == CONDITION_SUCCEEDED) | |
6257 | has_succeeded_trigger = true; | |
6258 | else if (!failed_trigger) | |
6259 | failed_trigger = c; | |
6260 | } else if (c->result != CONDITION_SUCCEEDED) | |
6261 | return c; | |
6262 | ||
6263 | return failed_trigger && !has_succeeded_trigger ? failed_trigger : NULL; | |
6264 | } | |
6265 | ||
5afe510c LP |
6266 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
6267 | [COLLECT_INACTIVE] = "inactive", | |
6268 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
6269 | }; | |
6270 | ||
6271 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); | |
15ed3c3a LP |
6272 | |
6273 | Unit* unit_has_dependency(const Unit *u, UnitDependencyAtom atom, Unit *other) { | |
6274 | Unit *i; | |
6275 | ||
6276 | assert(u); | |
6277 | ||
6278 | /* Checks if the unit has a dependency on 'other' with the specified dependency atom. If 'other' is | |
6279 | * NULL checks if the unit has *any* dependency of that atom. Returns 'other' if found (or if 'other' | |
6280 | * is NULL the first entry found), or NULL if not found. */ | |
6281 | ||
6282 | UNIT_FOREACH_DEPENDENCY(i, u, atom) | |
6283 | if (!other || other == i) | |
6284 | return i; | |
6285 | ||
6286 | return NULL; | |
6287 | } | |
6288 | ||
6289 | int unit_get_dependency_array(const Unit *u, UnitDependencyAtom atom, Unit ***ret_array) { | |
6290 | _cleanup_free_ Unit **array = NULL; | |
6291 | size_t n = 0; | |
6292 | Unit *other; | |
6293 | ||
6294 | assert(u); | |
6295 | assert(ret_array); | |
6296 | ||
6297 | /* Gets a list of units matching a specific atom as array. This is useful when iterating through | |
6298 | * dependencies while modifying them: the array is an "atomic snapshot" of sorts, that can be read | |
48008c1c | 6299 | * while the dependency table is continuously updated. */ |
15ed3c3a LP |
6300 | |
6301 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
6302 | if (!GREEDY_REALLOC(array, n + 1)) | |
6303 | return -ENOMEM; | |
6304 | ||
6305 | array[n++] = other; | |
6306 | } | |
6307 | ||
6308 | *ret_array = TAKE_PTR(array); | |
6309 | ||
6310 | assert(n <= INT_MAX); | |
6311 | return (int) n; | |
6312 | } | |
48b92b37 | 6313 | |
83123a44 YW |
6314 | int unit_get_transitive_dependency_set(Unit *u, UnitDependencyAtom atom, Set **ret) { |
6315 | _cleanup_set_free_ Set *units = NULL, *queue = NULL; | |
6316 | Unit *other; | |
6317 | int r; | |
6318 | ||
6319 | assert(u); | |
6320 | assert(ret); | |
6321 | ||
6322 | /* Similar to unit_get_dependency_array(), but also search the same dependency in other units. */ | |
6323 | ||
6324 | do { | |
6325 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
6326 | r = set_ensure_put(&units, NULL, other); | |
6327 | if (r < 0) | |
6328 | return r; | |
6329 | if (r == 0) | |
6330 | continue; | |
6331 | r = set_ensure_put(&queue, NULL, other); | |
6332 | if (r < 0) | |
6333 | return r; | |
6334 | } | |
6335 | } while ((u = set_steal_first(queue))); | |
6336 | ||
6337 | *ret = TAKE_PTR(units); | |
6338 | return 0; | |
6339 | } | |
6340 | ||
e9276800 LP |
6341 | int unit_arm_timer( |
6342 | Unit *u, | |
6343 | sd_event_source **source, | |
6344 | bool relative, | |
6345 | usec_t usec, | |
6346 | sd_event_time_handler_t handler) { | |
6347 | ||
6348 | int r; | |
6349 | ||
6350 | assert(u); | |
6351 | assert(source); | |
6352 | assert(handler); | |
6353 | ||
6354 | if (*source) { | |
6355 | if (usec == USEC_INFINITY) | |
6356 | return sd_event_source_set_enabled(*source, SD_EVENT_OFF); | |
6357 | ||
6358 | r = (relative ? sd_event_source_set_time_relative : sd_event_source_set_time)(*source, usec); | |
6359 | if (r < 0) | |
6360 | return r; | |
6361 | ||
6362 | return sd_event_source_set_enabled(*source, SD_EVENT_ONESHOT); | |
6363 | } | |
6364 | ||
6365 | if (usec == USEC_INFINITY) | |
6366 | return 0; | |
6367 | ||
6368 | r = (relative ? sd_event_add_time_relative : sd_event_add_time)( | |
6369 | u->manager->event, | |
6370 | source, | |
6371 | CLOCK_MONOTONIC, | |
6372 | usec, 0, | |
6373 | handler, | |
6374 | u); | |
6375 | if (r < 0) | |
6376 | return r; | |
6377 | ||
6378 | const char *d = strjoina(unit_type_to_string(u->type), "-timer"); | |
6379 | (void) sd_event_source_set_description(*source, d); | |
6380 | ||
6381 | return 0; | |
6382 | } | |
6383 | ||
a8157796 LP |
6384 | static int unit_get_nice(Unit *u) { |
6385 | ExecContext *ec; | |
6386 | ||
6387 | ec = unit_get_exec_context(u); | |
6388 | return ec ? ec->nice : 0; | |
6389 | } | |
6390 | ||
6391 | static uint64_t unit_get_cpu_weight(Unit *u) { | |
6392 | CGroupContext *cc; | |
6393 | ||
6394 | cc = unit_get_cgroup_context(u); | |
6395 | return cc ? cgroup_context_cpu_weight(cc, manager_state(u->manager)) : CGROUP_WEIGHT_DEFAULT; | |
6396 | } | |
6397 | ||
6398 | int unit_compare_priority(Unit *a, Unit *b) { | |
6399 | int ret; | |
6400 | ||
6401 | ret = CMP(a->type, b->type); | |
6402 | if (ret != 0) | |
6403 | return -ret; | |
6404 | ||
6405 | ret = CMP(unit_get_cpu_weight(a), unit_get_cpu_weight(b)); | |
6406 | if (ret != 0) | |
6407 | return -ret; | |
6408 | ||
6409 | ret = CMP(unit_get_nice(a), unit_get_nice(b)); | |
6410 | if (ret != 0) | |
6411 | return ret; | |
6412 | ||
6413 | return strcmp(a->id, b->id); | |
6414 | } | |
6415 | ||
48b92b37 | 6416 | const ActivationDetailsVTable * const activation_details_vtable[_UNIT_TYPE_MAX] = { |
4c420328 | 6417 | [UNIT_PATH] = &activation_details_path_vtable, |
c8bc7519 | 6418 | [UNIT_TIMER] = &activation_details_timer_vtable, |
48b92b37 LB |
6419 | }; |
6420 | ||
6421 | ActivationDetails *activation_details_new(Unit *trigger_unit) { | |
6422 | _cleanup_free_ ActivationDetails *details = NULL; | |
6423 | ||
6424 | assert(trigger_unit); | |
6425 | assert(trigger_unit->type != _UNIT_TYPE_INVALID); | |
6426 | assert(trigger_unit->id); | |
6427 | ||
6428 | details = malloc0(activation_details_vtable[trigger_unit->type]->object_size); | |
6429 | if (!details) | |
6430 | return NULL; | |
6431 | ||
6432 | *details = (ActivationDetails) { | |
6433 | .n_ref = 1, | |
6434 | .trigger_unit_type = trigger_unit->type, | |
6435 | }; | |
6436 | ||
6437 | details->trigger_unit_name = strdup(trigger_unit->id); | |
6438 | if (!details->trigger_unit_name) | |
6439 | return NULL; | |
6440 | ||
6441 | if (ACTIVATION_DETAILS_VTABLE(details)->init) | |
6442 | ACTIVATION_DETAILS_VTABLE(details)->init(details, trigger_unit); | |
6443 | ||
6444 | return TAKE_PTR(details); | |
6445 | } | |
6446 | ||
6447 | static ActivationDetails *activation_details_free(ActivationDetails *details) { | |
6448 | if (!details) | |
6449 | return NULL; | |
6450 | ||
6451 | if (ACTIVATION_DETAILS_VTABLE(details)->done) | |
6452 | ACTIVATION_DETAILS_VTABLE(details)->done(details); | |
6453 | ||
6454 | free(details->trigger_unit_name); | |
6455 | ||
6456 | return mfree(details); | |
6457 | } | |
6458 | ||
6459 | void activation_details_serialize(ActivationDetails *details, FILE *f) { | |
6460 | if (!details || details->trigger_unit_type == _UNIT_TYPE_INVALID) | |
6461 | return; | |
6462 | ||
6463 | (void) serialize_item(f, "activation-details-unit-type", unit_type_to_string(details->trigger_unit_type)); | |
6464 | if (details->trigger_unit_name) | |
6465 | (void) serialize_item(f, "activation-details-unit-name", details->trigger_unit_name); | |
6466 | if (ACTIVATION_DETAILS_VTABLE(details)->serialize) | |
6467 | ACTIVATION_DETAILS_VTABLE(details)->serialize(details, f); | |
6468 | } | |
6469 | ||
6470 | int activation_details_deserialize(const char *key, const char *value, ActivationDetails **details) { | |
e8dba806 FS |
6471 | int r; |
6472 | ||
48b92b37 LB |
6473 | assert(key); |
6474 | assert(value); | |
6475 | assert(details); | |
6476 | ||
6477 | if (!*details) { | |
6478 | UnitType t; | |
6479 | ||
6480 | if (!streq(key, "activation-details-unit-type")) | |
6481 | return -EINVAL; | |
6482 | ||
6483 | t = unit_type_from_string(value); | |
210cb8d6 YW |
6484 | if (t < 0) |
6485 | return t; | |
6486 | ||
6487 | /* The activation details vtable has defined ops only for path and timer units */ | |
6488 | if (!activation_details_vtable[t]) | |
48b92b37 LB |
6489 | return -EINVAL; |
6490 | ||
6491 | *details = malloc0(activation_details_vtable[t]->object_size); | |
6492 | if (!*details) | |
6493 | return -ENOMEM; | |
6494 | ||
6495 | **details = (ActivationDetails) { | |
6496 | .n_ref = 1, | |
6497 | .trigger_unit_type = t, | |
6498 | }; | |
6499 | ||
6500 | return 0; | |
6501 | } | |
6502 | ||
6503 | if (streq(key, "activation-details-unit-name")) { | |
e8dba806 FS |
6504 | r = free_and_strdup(&(*details)->trigger_unit_name, value); |
6505 | if (r < 0) | |
6506 | return r; | |
48b92b37 LB |
6507 | |
6508 | return 0; | |
6509 | } | |
6510 | ||
6511 | if (ACTIVATION_DETAILS_VTABLE(*details)->deserialize) | |
6512 | return ACTIVATION_DETAILS_VTABLE(*details)->deserialize(key, value, details); | |
6513 | ||
6514 | return -EINVAL; | |
6515 | } | |
6516 | ||
6517 | int activation_details_append_env(ActivationDetails *details, char ***strv) { | |
6518 | int r = 0; | |
6519 | ||
6520 | assert(strv); | |
6521 | ||
6522 | if (!details) | |
6523 | return 0; | |
6524 | ||
6525 | if (!isempty(details->trigger_unit_name)) { | |
6526 | char *s = strjoin("TRIGGER_UNIT=", details->trigger_unit_name); | |
6527 | if (!s) | |
6528 | return -ENOMEM; | |
6529 | ||
6530 | r = strv_consume(strv, TAKE_PTR(s)); | |
6531 | if (r < 0) | |
6532 | return r; | |
6533 | } | |
6534 | ||
6535 | if (ACTIVATION_DETAILS_VTABLE(details)->append_env) { | |
6536 | r = ACTIVATION_DETAILS_VTABLE(details)->append_env(details, strv); | |
6537 | if (r < 0) | |
6538 | return r; | |
6539 | } | |
6540 | ||
6541 | return r + !isempty(details->trigger_unit_name); /* Return the number of variables added to the env block */ | |
6542 | } | |
6543 | ||
6544 | int activation_details_append_pair(ActivationDetails *details, char ***strv) { | |
6545 | int r = 0; | |
6546 | ||
6547 | assert(strv); | |
6548 | ||
6549 | if (!details) | |
6550 | return 0; | |
6551 | ||
6552 | if (!isempty(details->trigger_unit_name)) { | |
6553 | r = strv_extend(strv, "trigger_unit"); | |
6554 | if (r < 0) | |
6555 | return r; | |
6556 | ||
6557 | r = strv_extend(strv, details->trigger_unit_name); | |
6558 | if (r < 0) | |
6559 | return r; | |
6560 | } | |
6561 | ||
6562 | if (ACTIVATION_DETAILS_VTABLE(details)->append_env) { | |
6563 | r = ACTIVATION_DETAILS_VTABLE(details)->append_pair(details, strv); | |
6564 | if (r < 0) | |
6565 | return r; | |
6566 | } | |
6567 | ||
6568 | return r + !isempty(details->trigger_unit_name); /* Return the number of pairs added to the strv */ | |
6569 | } | |
6570 | ||
6571 | DEFINE_TRIVIAL_REF_UNREF_FUNC(ActivationDetails, activation_details, activation_details_free); |