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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 | ||
c891efaf | 1857 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1858 | assert(u); |
c891efaf FB |
1859 | |
1860 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1861 | return false; | |
1862 | ||
1863 | /* For some reasons units remaining in the same process group | |
1864 | * as PID 1 fail to acquire the console even if it's not used | |
1865 | * by any process. So skip the confirmation question for them. */ | |
1866 | return !unit_get_exec_context(u)->same_pgrp; | |
1867 | } | |
1868 | ||
631b676b LP |
1869 | static bool unit_verify_deps(Unit *u) { |
1870 | Unit *other; | |
631b676b LP |
1871 | |
1872 | assert(u); | |
1873 | ||
defe63b0 LP |
1874 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined |
1875 | * with After=. We do not check Requires= or Requisite= here as they only should have an effect on | |
1876 | * the job processing, but do not have any effect afterwards. We don't check BindsTo= dependencies | |
1877 | * that are not used in conjunction with After= as for them any such check would make things entirely | |
1878 | * racy. */ | |
631b676b | 1879 | |
15ed3c3a | 1880 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { |
631b676b | 1881 | |
15ed3c3a | 1882 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other)) |
631b676b LP |
1883 | continue; |
1884 | ||
1885 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1886 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1887 | return false; | |
1888 | } | |
1889 | } | |
1890 | ||
1891 | return true; | |
1892 | } | |
1893 | ||
9adb6959 | 1894 | /* Errors that aren't really errors: |
6bf0f408 | 1895 | * -EALREADY: Unit is already started. |
9adb6959 | 1896 | * -ECOMM: Condition failed |
6bf0f408 | 1897 | * -EAGAIN: An operation is already in progress. Retry later. |
9adb6959 LP |
1898 | * |
1899 | * Errors that are real errors: | |
1900 | * -EBADR: This unit type does not support starting. | |
2de9b979 | 1901 | * -ECANCELED: Start limit hit, too many requests for now |
6bf0f408 LP |
1902 | * -EPROTO: Assert failed |
1903 | * -EINVAL: Unit not loaded | |
1904 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1905 | * -ENOLINK: The necessary dependencies are not fulfilled. |
d4fd1cf2 | 1906 | * -ESTALE: This unit has been started before and can't be started a second time |
a4191c9f | 1907 | * -ENOENT: This is a triggering unit and unit to trigger is not loaded |
87f0e418 | 1908 | */ |
48b92b37 | 1909 | int unit_start(Unit *u, ActivationDetails *details) { |
87f0e418 | 1910 | UnitActiveState state; |
92ab323c | 1911 | Unit *following; |
5f37c1a9 | 1912 | int r; |
87f0e418 LP |
1913 | |
1914 | assert(u); | |
1915 | ||
47261967 LP |
1916 | /* Let's hold off running start jobs for mount units when /proc/self/mountinfo monitor is ratelimited. */ |
1917 | if (UNIT_VTABLE(u)->subsystem_ratelimited) { | |
1918 | r = UNIT_VTABLE(u)->subsystem_ratelimited(u->manager); | |
1919 | if (r < 0) | |
1920 | return r; | |
1921 | if (r > 0) | |
1922 | return -EAGAIN; | |
1923 | } | |
b161bc39 | 1924 | |
5766aca8 LP |
1925 | /* If this is already started, then this will succeed. Note that this will even succeed if this unit |
1926 | * is not startable by the user. This is relied on to detect when we need to wait for units and when | |
1927 | * waiting is finished. */ | |
87f0e418 LP |
1928 | state = unit_active_state(u); |
1929 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1930 | return -EALREADY; | |
380dc8b0 LP |
1931 | if (state == UNIT_MAINTENANCE) |
1932 | return -EAGAIN; | |
87f0e418 | 1933 | |
6bf0f408 LP |
1934 | /* Units that aren't loaded cannot be started */ |
1935 | if (u->load_state != UNIT_LOADED) | |
1936 | return -EINVAL; | |
1937 | ||
d4fd1cf2 LP |
1938 | /* Refuse starting scope units more than once */ |
1939 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1940 | return -ESTALE; | |
1941 | ||
4e1ac54e | 1942 | /* If the conditions were unmet, don't do anything at all. If we already are activating this call might |
5766aca8 LP |
1943 | * still be useful to speed up activation in case there is some hold-off time, but we don't want to |
1944 | * recheck the condition in that case. */ | |
a82e5507 | 1945 | if (state != UNIT_ACTIVATING && |
5af6aa58 | 1946 | !unit_test_condition(u)) |
4e1ac54e | 1947 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(ECOMM), "Starting requested but condition not met. Not starting unit."); |
52661efd | 1948 | |
59fccdc5 LP |
1949 | /* If the asserts failed, fail the entire job */ |
1950 | if (state != UNIT_ACTIVATING && | |
5766aca8 LP |
1951 | !unit_test_assert(u)) |
1952 | return log_unit_notice_errno(u, SYNTHETIC_ERRNO(EPROTO), "Starting requested but asserts failed."); | |
59fccdc5 | 1953 | |
5766aca8 LP |
1954 | /* Units of types that aren't supported cannot be started. Note that we do this test only after the |
1955 | * condition checks, so that we rather return condition check errors (which are usually not | |
1956 | * considered a true failure) than "not supported" errors (which are considered a failure). | |
d11a7645 | 1957 | */ |
96cf3ec9 | 1958 | if (!unit_type_supported(u->type)) |
d11a7645 LP |
1959 | return -EOPNOTSUPP; |
1960 | ||
5766aca8 LP |
1961 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine |
1962 | * should have taken care of this already, but let's check this here again. After all, our | |
413e8650 | 1963 | * dependencies might not be in effect anymore, due to a reload or due to an unmet condition. */ |
631b676b LP |
1964 | if (!unit_verify_deps(u)) |
1965 | return -ENOLINK; | |
1966 | ||
92ab323c | 1967 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1968 | following = unit_following(u); |
1969 | if (following) { | |
f2341e0a | 1970 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
48b92b37 | 1971 | return unit_start(following, details); |
92ab323c LP |
1972 | } |
1973 | ||
705578c3 MS |
1974 | /* Check our ability to start early so that failure conditions don't cause us to enter a busy loop. */ |
1975 | if (UNIT_VTABLE(u)->can_start) { | |
1976 | r = UNIT_VTABLE(u)->can_start(u); | |
ce2146f5 DDM |
1977 | if (r < 0) |
1978 | return r; | |
1979 | } | |
1980 | ||
92ab323c LP |
1981 | /* If it is stopped, but we cannot start it, then fail */ |
1982 | if (!UNIT_VTABLE(u)->start) | |
1983 | return -EBADR; | |
1984 | ||
5766aca8 LP |
1985 | /* We don't suppress calls to ->start() here when we are already starting, to allow this request to |
1986 | * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it | |
1987 | * waits for a holdoff timer to elapse before it will start again. */ | |
87f0e418 | 1988 | |
c1e1601e | 1989 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 1990 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 1991 | |
48b92b37 LB |
1992 | if (!u->activation_details) /* Older details object wins */ |
1993 | u->activation_details = activation_details_ref(details); | |
1994 | ||
d1a34ae9 | 1995 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1996 | } |
1997 | ||
1998 | bool unit_can_start(Unit *u) { | |
1999 | assert(u); | |
2000 | ||
8ff4d2ab LP |
2001 | if (u->load_state != UNIT_LOADED) |
2002 | return false; | |
2003 | ||
96cf3ec9 | 2004 | if (!unit_type_supported(u->type)) |
8ff4d2ab LP |
2005 | return false; |
2006 | ||
d4fd1cf2 LP |
2007 | /* Scope units may be started only once */ |
2008 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
2009 | return false; | |
2010 | ||
87f0e418 LP |
2011 | return !!UNIT_VTABLE(u)->start; |
2012 | } | |
2013 | ||
2528a7a6 LP |
2014 | bool unit_can_isolate(Unit *u) { |
2015 | assert(u); | |
2016 | ||
2017 | return unit_can_start(u) && | |
ac155bb8 | 2018 | u->allow_isolate; |
2528a7a6 LP |
2019 | } |
2020 | ||
87f0e418 LP |
2021 | /* Errors: |
2022 | * -EBADR: This unit type does not support stopping. | |
2023 | * -EALREADY: Unit is already stopped. | |
2024 | * -EAGAIN: An operation is already in progress. Retry later. | |
2025 | */ | |
2026 | int unit_stop(Unit *u) { | |
2027 | UnitActiveState state; | |
92ab323c | 2028 | Unit *following; |
87f0e418 LP |
2029 | |
2030 | assert(u); | |
2031 | ||
87f0e418 | 2032 | state = unit_active_state(u); |
fdf20a31 | 2033 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
2034 | return -EALREADY; |
2035 | ||
0faacd47 LP |
2036 | following = unit_following(u); |
2037 | if (following) { | |
f2341e0a | 2038 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
2039 | return unit_stop(following); |
2040 | } | |
2041 | ||
7898b0cf LP |
2042 | if (!UNIT_VTABLE(u)->stop) |
2043 | return -EBADR; | |
2044 | ||
c1e1601e | 2045 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 2046 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 2047 | |
d1a34ae9 | 2048 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
2049 | } |
2050 | ||
f5869324 LP |
2051 | bool unit_can_stop(Unit *u) { |
2052 | assert(u); | |
2053 | ||
39c79477 ZJS |
2054 | /* Note: if we return true here, it does not mean that the unit may be successfully stopped. |
2055 | * Extrinsic units follow external state and they may stop following external state changes | |
2056 | * (hence we return true here), but an attempt to do this through the manager will fail. */ | |
2057 | ||
96cf3ec9 | 2058 | if (!unit_type_supported(u->type)) |
f5869324 LP |
2059 | return false; |
2060 | ||
2061 | if (u->perpetual) | |
2062 | return false; | |
2063 | ||
2064 | return !!UNIT_VTABLE(u)->stop; | |
2065 | } | |
2066 | ||
87f0e418 LP |
2067 | /* Errors: |
2068 | * -EBADR: This unit type does not support reloading. | |
2069 | * -ENOEXEC: Unit is not started. | |
2070 | * -EAGAIN: An operation is already in progress. Retry later. | |
2071 | */ | |
2072 | int unit_reload(Unit *u) { | |
2073 | UnitActiveState state; | |
92ab323c | 2074 | Unit *following; |
87f0e418 LP |
2075 | |
2076 | assert(u); | |
2077 | ||
ac155bb8 | 2078 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
2079 | return -EINVAL; |
2080 | ||
87f0e418 LP |
2081 | if (!unit_can_reload(u)) |
2082 | return -EBADR; | |
2083 | ||
2084 | state = unit_active_state(u); | |
e364ad06 | 2085 | if (state == UNIT_RELOADING) |
6255af75 | 2086 | return -EAGAIN; |
87f0e418 | 2087 | |
d85ff944 YW |
2088 | if (state != UNIT_ACTIVE) |
2089 | return log_unit_warning_errno(u, SYNTHETIC_ERRNO(ENOEXEC), "Unit cannot be reloaded because it is inactive."); | |
87f0e418 | 2090 | |
e48614c4 ZJS |
2091 | following = unit_following(u); |
2092 | if (following) { | |
f2341e0a | 2093 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
2094 | return unit_reload(following); |
2095 | } | |
2096 | ||
c1e1601e | 2097 | unit_add_to_dbus_queue(u); |
82a2b6bb | 2098 | |
f54bcca5 JR |
2099 | if (!UNIT_VTABLE(u)->reload) { |
2100 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
96b09de5 | 2101 | unit_notify(u, unit_active_state(u), unit_active_state(u), /* reload_success = */ true); |
f54bcca5 JR |
2102 | return 0; |
2103 | } | |
2104 | ||
d9e45bc3 MS |
2105 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
2106 | ||
d1a34ae9 | 2107 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
2108 | } |
2109 | ||
2110 | bool unit_can_reload(Unit *u) { | |
2111 | assert(u); | |
2112 | ||
f54bcca5 JR |
2113 | if (UNIT_VTABLE(u)->can_reload) |
2114 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 2115 | |
15ed3c3a | 2116 | if (unit_has_dependency(u, UNIT_ATOM_PROPAGATES_RELOAD_TO, NULL)) |
87f0e418 LP |
2117 | return true; |
2118 | ||
f54bcca5 | 2119 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
2120 | } |
2121 | ||
a3c1168a | 2122 | bool unit_is_unneeded(Unit *u) { |
15ed3c3a | 2123 | Unit *other; |
f3bff0eb LP |
2124 | assert(u); |
2125 | ||
ac155bb8 | 2126 | if (!u->stop_when_unneeded) |
a3c1168a | 2127 | return false; |
f3bff0eb | 2128 | |
a3c1168a | 2129 | /* Don't clean up while the unit is transitioning or is even inactive. */ |
116654d2 | 2130 | if (unit_active_state(u) != UNIT_ACTIVE) |
a3c1168a LP |
2131 | return false; |
2132 | if (u->job) | |
2133 | return false; | |
f3bff0eb | 2134 | |
15ed3c3a | 2135 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_PINS_STOP_WHEN_UNNEEDED) { |
fda09318 | 2136 | /* If a dependent unit has a job queued, is active or transitioning, or is marked for |
a3c1168a | 2137 | * restart, then don't clean this one up. */ |
b81884e7 | 2138 | |
15ed3c3a LP |
2139 | if (other->job) |
2140 | return false; | |
a3c1168a | 2141 | |
15ed3c3a LP |
2142 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
2143 | return false; | |
a3c1168a | 2144 | |
15ed3c3a LP |
2145 | if (unit_will_restart(other)) |
2146 | return false; | |
bea355da LP |
2147 | } |
2148 | ||
a3c1168a LP |
2149 | return true; |
2150 | } | |
f3bff0eb | 2151 | |
0bc488c9 LP |
2152 | bool unit_is_upheld_by_active(Unit *u, Unit **ret_culprit) { |
2153 | Unit *other; | |
2154 | ||
2155 | assert(u); | |
2156 | ||
2157 | /* Checks if the unit needs to be started because it currently is not running, but some other unit | |
2158 | * that is active declared an Uphold= dependencies on it */ | |
2159 | ||
2160 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) || u->job) { | |
2161 | if (ret_culprit) | |
2162 | *ret_culprit = NULL; | |
2163 | return false; | |
2164 | } | |
2165 | ||
2166 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_START_STEADILY) { | |
2167 | if (other->job) | |
2168 | continue; | |
2169 | ||
2170 | if (UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
2171 | if (ret_culprit) | |
2172 | *ret_culprit = other; | |
2173 | return true; | |
2174 | } | |
2175 | } | |
2176 | ||
2177 | if (ret_culprit) | |
2178 | *ret_culprit = NULL; | |
2179 | return false; | |
2180 | } | |
2181 | ||
56c59592 LP |
2182 | bool unit_is_bound_by_inactive(Unit *u, Unit **ret_culprit) { |
2183 | Unit *other; | |
2184 | ||
2185 | assert(u); | |
2186 | ||
2187 | /* Checks whether this unit is bound to another unit that is inactive, i.e. whether we should stop | |
7802194a | 2188 | * because the other unit is down. */ |
56c59592 LP |
2189 | |
2190 | if (unit_active_state(u) != UNIT_ACTIVE || u->job) { | |
2191 | /* Don't clean up while the unit is transitioning or is even inactive. */ | |
2192 | if (ret_culprit) | |
2193 | *ret_culprit = NULL; | |
2194 | return false; | |
2195 | } | |
2196 | ||
2197 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { | |
2198 | if (other->job) | |
2199 | continue; | |
2200 | ||
2201 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) { | |
3da36106 | 2202 | if (ret_culprit) |
56c59592 LP |
2203 | *ret_culprit = other; |
2204 | ||
2205 | return true; | |
2206 | } | |
2207 | } | |
2208 | ||
2209 | if (ret_culprit) | |
2210 | *ret_culprit = NULL; | |
2211 | return false; | |
2212 | } | |
2213 | ||
a3c1168a | 2214 | static void check_unneeded_dependencies(Unit *u) { |
15ed3c3a | 2215 | Unit *other; |
a3c1168a LP |
2216 | assert(u); |
2217 | ||
2218 | /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */ | |
2219 | ||
15ed3c3a LP |
2220 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_STOP_WHEN_UNNEEDED_QUEUE) |
2221 | unit_submit_to_stop_when_unneeded_queue(other); | |
f3bff0eb LP |
2222 | } |
2223 | ||
0bc488c9 LP |
2224 | static void check_uphold_dependencies(Unit *u) { |
2225 | Unit *other; | |
2226 | assert(u); | |
2227 | ||
2228 | /* Add all units this unit depends on to the queue that processes Uphold= behaviour. */ | |
2229 | ||
2230 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_START_WHEN_UPHELD_QUEUE) | |
2231 | unit_submit_to_start_when_upheld_queue(other); | |
2232 | } | |
2233 | ||
56c59592 | 2234 | static void check_bound_by_dependencies(Unit *u) { |
ff502445 | 2235 | Unit *other; |
ff502445 LP |
2236 | assert(u); |
2237 | ||
56c59592 | 2238 | /* Add all units this unit depends on to the queue that processes BindsTo= stop behaviour. */ |
ff502445 | 2239 | |
56c59592 LP |
2240 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_CANNOT_BE_ACTIVE_WITHOUT_QUEUE) |
2241 | unit_submit_to_stop_when_bound_queue(other); | |
ff502445 LP |
2242 | } |
2243 | ||
87f0e418 | 2244 | static void retroactively_start_dependencies(Unit *u) { |
87f0e418 LP |
2245 | Unit *other; |
2246 | ||
2247 | assert(u); | |
2248 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2249 | ||
15ed3c3a LP |
2250 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_REPLACE) /* Requires= + BindsTo= */ |
2251 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
b81884e7 | 2252 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2253 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
b81884e7 | 2254 | |
15ed3c3a LP |
2255 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_FAIL) /* Wants= */ |
2256 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
b81884e7 | 2257 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2258 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL, NULL); |
87f0e418 | 2259 | |
15ed3c3a | 2260 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_START) /* Conflicts= (and inverse) */ |
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); |
87f0e418 LP |
2263 | } |
2264 | ||
2265 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 LP |
2266 | Unit *other; |
2267 | ||
2268 | assert(u); | |
2269 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2270 | ||
b81884e7 | 2271 | /* Pull down units which are bound to us recursively if enabled */ |
15ed3c3a | 2272 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_STOP) /* BoundBy= */ |
b81884e7 | 2273 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2274 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
cd0504d0 MS |
2275 | } |
2276 | ||
294446dc LP |
2277 | void unit_start_on_failure( |
2278 | Unit *u, | |
2279 | const char *dependency_name, | |
2280 | UnitDependencyAtom atom, | |
2281 | JobMode job_mode) { | |
2282 | ||
82acee14 | 2283 | int n_jobs = -1; |
c0daa706 | 2284 | Unit *other; |
7f66b026 | 2285 | int r; |
c0daa706 LP |
2286 | |
2287 | assert(u); | |
294446dc LP |
2288 | assert(dependency_name); |
2289 | assert(IN_SET(atom, UNIT_ATOM_ON_SUCCESS, UNIT_ATOM_ON_FAILURE)); | |
2290 | ||
2291 | /* Act on OnFailure= and OnSuccess= dependencies */ | |
c0daa706 | 2292 | |
294446dc | 2293 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { |
7f66b026 | 2294 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
222ae6a8 | 2295 | |
82acee14 | 2296 | if (n_jobs < 0) { |
294446dc | 2297 | log_unit_info(u, "Triggering %s dependencies.", dependency_name); |
82acee14 | 2298 | n_jobs = 0; |
15ed3c3a LP |
2299 | } |
2300 | ||
95c81c55 | 2301 | r = manager_add_job(u->manager, JOB_START, other, job_mode, NULL, &error, NULL); |
c1b6628d | 2302 | if (r < 0) |
294446dc LP |
2303 | log_unit_warning_errno( |
2304 | u, r, "Failed to enqueue %s job, ignoring: %s", | |
2305 | dependency_name, bus_error_message(&error, r)); | |
82acee14 | 2306 | n_jobs ++; |
222ae6a8 | 2307 | } |
294446dc | 2308 | |
82acee14 | 2309 | if (n_jobs >= 0) |
c0f86d66 | 2310 | log_unit_debug(u, "Triggering %s dependencies done (%i %s).", |
82acee14 | 2311 | dependency_name, n_jobs, n_jobs == 1 ? "job" : "jobs"); |
c0daa706 LP |
2312 | } |
2313 | ||
3ecaa09b LP |
2314 | void unit_trigger_notify(Unit *u) { |
2315 | Unit *other; | |
3ecaa09b LP |
2316 | |
2317 | assert(u); | |
2318 | ||
15ed3c3a | 2319 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_TRIGGERED_BY) |
3ecaa09b LP |
2320 | if (UNIT_VTABLE(other)->trigger_notify) |
2321 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2322 | } | |
2323 | ||
37109b85 ZJS |
2324 | static int raise_level(int log_level, bool condition_info, bool condition_notice) { |
2325 | if (condition_notice && log_level > LOG_NOTICE) | |
2326 | return LOG_NOTICE; | |
2327 | if (condition_info && log_level > LOG_INFO) | |
2328 | return LOG_INFO; | |
2329 | return log_level; | |
2330 | } | |
2331 | ||
915b1d01 | 2332 | static int unit_log_resources(Unit *u) { |
bc40a20e LP |
2333 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + _CGROUP_IO_ACCOUNTING_METRIC_MAX + 4]; |
2334 | bool any_traffic = false, have_ip_accounting = false, any_io = false, have_io_accounting = false; | |
2335 | _cleanup_free_ char *igress = NULL, *egress = NULL, *rr = NULL, *wr = NULL; | |
162392b7 | 2336 | int log_level = LOG_DEBUG; /* May be raised if resources consumed over a threshold */ |
915b1d01 | 2337 | size_t n_message_parts = 0, n_iovec = 0; |
bc40a20e | 2338 | char* message_parts[1 + 2 + 2 + 1], *t; |
915b1d01 | 2339 | nsec_t nsec = NSEC_INFINITY; |
915b1d01 LP |
2340 | int r; |
2341 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2342 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2343 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2344 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2345 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2346 | }; | |
bc40a20e LP |
2347 | const char* const io_fields[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
2348 | [CGROUP_IO_READ_BYTES] = "IO_METRIC_READ_BYTES", | |
2349 | [CGROUP_IO_WRITE_BYTES] = "IO_METRIC_WRITE_BYTES", | |
2350 | [CGROUP_IO_READ_OPERATIONS] = "IO_METRIC_READ_OPERATIONS", | |
2351 | [CGROUP_IO_WRITE_OPERATIONS] = "IO_METRIC_WRITE_OPERATIONS", | |
2352 | }; | |
915b1d01 LP |
2353 | |
2354 | assert(u); | |
2355 | ||
2356 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2357 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2358 | * information and the complete data in structured fields. */ | |
2359 | ||
2360 | (void) unit_get_cpu_usage(u, &nsec); | |
2361 | if (nsec != NSEC_INFINITY) { | |
915b1d01 LP |
2362 | /* Format the CPU time for inclusion in the structured log message */ |
2363 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2364 | r = log_oom(); | |
2365 | goto finish; | |
2366 | } | |
2367 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2368 | ||
2369 | /* Format the CPU time for inclusion in the human language message string */ | |
5291f26d | 2370 | t = strjoin("consumed ", FORMAT_TIMESPAN(nsec / NSEC_PER_USEC, USEC_PER_MSEC), " CPU time"); |
915b1d01 LP |
2371 | if (!t) { |
2372 | r = log_oom(); | |
2373 | goto finish; | |
2374 | } | |
2375 | ||
2376 | message_parts[n_message_parts++] = t; | |
37109b85 ZJS |
2377 | |
2378 | log_level = raise_level(log_level, | |
ef6bb4dd CG |
2379 | nsec > MENTIONWORTHY_CPU_NSEC, |
2380 | nsec > NOTICEWORTHY_CPU_NSEC); | |
915b1d01 LP |
2381 | } |
2382 | ||
bc40a20e | 2383 | for (CGroupIOAccountingMetric k = 0; k < _CGROUP_IO_ACCOUNTING_METRIC_MAX; k++) { |
bc40a20e LP |
2384 | uint64_t value = UINT64_MAX; |
2385 | ||
2386 | assert(io_fields[k]); | |
2387 | ||
2388 | (void) unit_get_io_accounting(u, k, k > 0, &value); | |
2389 | if (value == UINT64_MAX) | |
2390 | continue; | |
2391 | ||
2392 | have_io_accounting = true; | |
2393 | if (value > 0) | |
2394 | any_io = true; | |
2395 | ||
2396 | /* Format IO accounting data for inclusion in the structured log message */ | |
2397 | if (asprintf(&t, "%s=%" PRIu64, io_fields[k], value) < 0) { | |
2398 | r = log_oom(); | |
2399 | goto finish; | |
2400 | } | |
2401 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2402 | ||
2403 | /* Format the IO accounting data for inclusion in the human language message string, but only | |
2404 | * for the bytes counters (and not for the operations counters) */ | |
2405 | if (k == CGROUP_IO_READ_BYTES) { | |
2406 | assert(!rr); | |
2b59bf51 | 2407 | rr = strjoin("read ", strna(FORMAT_BYTES(value)), " from disk"); |
bc40a20e LP |
2408 | if (!rr) { |
2409 | r = log_oom(); | |
2410 | goto finish; | |
2411 | } | |
2412 | } else if (k == CGROUP_IO_WRITE_BYTES) { | |
2413 | assert(!wr); | |
2b59bf51 | 2414 | wr = strjoin("written ", strna(FORMAT_BYTES(value)), " to disk"); |
bc40a20e LP |
2415 | if (!wr) { |
2416 | r = log_oom(); | |
2417 | goto finish; | |
2418 | } | |
2419 | } | |
37109b85 ZJS |
2420 | |
2421 | if (IN_SET(k, CGROUP_IO_READ_BYTES, CGROUP_IO_WRITE_BYTES)) | |
2422 | log_level = raise_level(log_level, | |
2423 | value > MENTIONWORTHY_IO_BYTES, | |
2424 | value > NOTICEWORTHY_IO_BYTES); | |
bc40a20e LP |
2425 | } |
2426 | ||
2427 | if (have_io_accounting) { | |
2428 | if (any_io) { | |
2429 | if (rr) | |
2430 | message_parts[n_message_parts++] = TAKE_PTR(rr); | |
2431 | if (wr) | |
2432 | message_parts[n_message_parts++] = TAKE_PTR(wr); | |
2433 | ||
2434 | } else { | |
2435 | char *k; | |
2436 | ||
2437 | k = strdup("no IO"); | |
2438 | if (!k) { | |
2439 | r = log_oom(); | |
2440 | goto finish; | |
2441 | } | |
2442 | ||
2443 | message_parts[n_message_parts++] = k; | |
2444 | } | |
2445 | } | |
2446 | ||
12375b95 | 2447 | for (CGroupIPAccountingMetric m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
915b1d01 LP |
2448 | uint64_t value = UINT64_MAX; |
2449 | ||
2450 | assert(ip_fields[m]); | |
2451 | ||
2452 | (void) unit_get_ip_accounting(u, m, &value); | |
2453 | if (value == UINT64_MAX) | |
2454 | continue; | |
82044702 LP |
2455 | |
2456 | have_ip_accounting = true; | |
a87b1faa LP |
2457 | if (value > 0) |
2458 | any_traffic = true; | |
915b1d01 LP |
2459 | |
2460 | /* Format IP accounting data for inclusion in the structured log message */ | |
2461 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2462 | r = log_oom(); | |
2463 | goto finish; | |
2464 | } | |
2465 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2466 | ||
2467 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2468 | * bytes counters (and not for the packets counters) */ | |
a87b1faa LP |
2469 | if (m == CGROUP_IP_INGRESS_BYTES) { |
2470 | assert(!igress); | |
2b59bf51 | 2471 | igress = strjoin("received ", strna(FORMAT_BYTES(value)), " IP traffic"); |
a87b1faa LP |
2472 | if (!igress) { |
2473 | r = log_oom(); | |
2474 | goto finish; | |
2475 | } | |
2476 | } else if (m == CGROUP_IP_EGRESS_BYTES) { | |
2477 | assert(!egress); | |
2b59bf51 | 2478 | egress = strjoin("sent ", strna(FORMAT_BYTES(value)), " IP traffic"); |
a87b1faa LP |
2479 | if (!egress) { |
2480 | r = log_oom(); | |
2481 | goto finish; | |
2482 | } | |
2483 | } | |
37109b85 ZJS |
2484 | |
2485 | if (IN_SET(m, CGROUP_IP_INGRESS_BYTES, CGROUP_IP_EGRESS_BYTES)) | |
2486 | log_level = raise_level(log_level, | |
2487 | value > MENTIONWORTHY_IP_BYTES, | |
2488 | value > NOTICEWORTHY_IP_BYTES); | |
a87b1faa LP |
2489 | } |
2490 | ||
c2503e35 RH |
2491 | /* This check is here because it is the earliest point following all possible log_level assignments. If |
2492 | * log_level is assigned anywhere after this point, move this check. */ | |
2493 | if (!unit_log_level_test(u, log_level)) { | |
2494 | r = 0; | |
2495 | goto finish; | |
2496 | } | |
2497 | ||
82044702 LP |
2498 | if (have_ip_accounting) { |
2499 | if (any_traffic) { | |
2500 | if (igress) | |
2501 | message_parts[n_message_parts++] = TAKE_PTR(igress); | |
2502 | if (egress) | |
2503 | message_parts[n_message_parts++] = TAKE_PTR(egress); | |
a87b1faa | 2504 | |
82044702 LP |
2505 | } else { |
2506 | char *k; | |
915b1d01 | 2507 | |
82044702 LP |
2508 | k = strdup("no IP traffic"); |
2509 | if (!k) { | |
2510 | r = log_oom(); | |
2511 | goto finish; | |
2512 | } | |
2513 | ||
2514 | message_parts[n_message_parts++] = k; | |
2515 | } | |
915b1d01 LP |
2516 | } |
2517 | ||
2518 | /* Is there any accounting data available at all? */ | |
2519 | if (n_iovec == 0) { | |
2520 | r = 0; | |
2521 | goto finish; | |
2522 | } | |
2523 | ||
2524 | if (n_message_parts == 0) | |
a87b1faa | 2525 | t = strjoina("MESSAGE=", u->id, ": Completed."); |
915b1d01 | 2526 | else { |
c2b2df60 | 2527 | _cleanup_free_ char *joined = NULL; |
915b1d01 LP |
2528 | |
2529 | message_parts[n_message_parts] = NULL; | |
2530 | ||
2531 | joined = strv_join(message_parts, ", "); | |
2532 | if (!joined) { | |
2533 | r = log_oom(); | |
2534 | goto finish; | |
2535 | } | |
2536 | ||
ec9d636b | 2537 | joined[0] = ascii_toupper(joined[0]); |
a87b1faa | 2538 | t = strjoina("MESSAGE=", u->id, ": ", joined, "."); |
915b1d01 LP |
2539 | } |
2540 | ||
2541 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2542 | * and hence don't increase n_iovec for them */ | |
2543 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2544 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2545 | ||
2546 | t = strjoina(u->manager->unit_log_field, u->id); | |
2547 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2548 | ||
2549 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2550 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2551 | ||
c2503e35 | 2552 | log_unit_struct_iovec(u, log_level, iovec, n_iovec + 4); |
915b1d01 LP |
2553 | r = 0; |
2554 | ||
2555 | finish: | |
24ae45cb | 2556 | free_many_charp(message_parts, n_message_parts); |
915b1d01 | 2557 | |
12375b95 | 2558 | for (size_t i = 0; i < n_iovec; i++) |
915b1d01 LP |
2559 | free(iovec[i].iov_base); |
2560 | ||
2561 | return r; | |
2562 | ||
2563 | } | |
2564 | ||
adefcf28 LP |
2565 | static void unit_update_on_console(Unit *u) { |
2566 | bool b; | |
2567 | ||
2568 | assert(u); | |
2569 | ||
2570 | b = unit_needs_console(u); | |
2571 | if (u->on_console == b) | |
2572 | return; | |
2573 | ||
2574 | u->on_console = b; | |
2575 | if (b) | |
2576 | manager_ref_console(u->manager); | |
2577 | else | |
2578 | manager_unref_console(u->manager); | |
adefcf28 LP |
2579 | } |
2580 | ||
6eb65e7c LP |
2581 | static void unit_emit_audit_start(Unit *u) { |
2582 | assert(u); | |
2583 | ||
d52b8493 | 2584 | if (UNIT_VTABLE(u)->audit_start_message_type <= 0) |
6eb65e7c LP |
2585 | return; |
2586 | ||
2587 | /* Write audit record if we have just finished starting up */ | |
d52b8493 | 2588 | manager_send_unit_audit(u->manager, u, UNIT_VTABLE(u)->audit_start_message_type, /* success= */ true); |
6eb65e7c LP |
2589 | u->in_audit = true; |
2590 | } | |
2591 | ||
2592 | static void unit_emit_audit_stop(Unit *u, UnitActiveState state) { | |
2593 | assert(u); | |
2594 | ||
d52b8493 | 2595 | if (UNIT_VTABLE(u)->audit_start_message_type <= 0) |
6eb65e7c LP |
2596 | return; |
2597 | ||
2598 | if (u->in_audit) { | |
2599 | /* Write audit record if we have just finished shutting down */ | |
d52b8493 | 2600 | manager_send_unit_audit(u->manager, u, UNIT_VTABLE(u)->audit_stop_message_type, /* success= */ state == UNIT_INACTIVE); |
6eb65e7c LP |
2601 | u->in_audit = false; |
2602 | } else { | |
2603 | /* Hmm, if there was no start record written write it now, so that we always have a nice pair */ | |
d52b8493 | 2604 | manager_send_unit_audit(u->manager, u, UNIT_VTABLE(u)->audit_start_message_type, /* success= */ state == UNIT_INACTIVE); |
6eb65e7c LP |
2605 | |
2606 | if (state == UNIT_INACTIVE) | |
d52b8493 | 2607 | manager_send_unit_audit(u->manager, u, UNIT_VTABLE(u)->audit_stop_message_type, /* success= */ true); |
6eb65e7c LP |
2608 | } |
2609 | } | |
2610 | ||
96b09de5 | 2611 | static bool unit_process_job(Job *j, UnitActiveState ns, bool reload_success) { |
16c74914 | 2612 | bool unexpected = false; |
31cd5f63 | 2613 | JobResult result; |
16c74914 LP |
2614 | |
2615 | assert(j); | |
2616 | ||
2617 | if (j->state == JOB_WAITING) | |
16c74914 LP |
2618 | /* So we reached a different state for this job. Let's see if we can run it now if it failed previously |
2619 | * due to EAGAIN. */ | |
2620 | job_add_to_run_queue(j); | |
2621 | ||
2622 | /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and | |
2623 | * hence needs to invalidate jobs. */ | |
2624 | ||
2625 | switch (j->type) { | |
2626 | ||
2627 | case JOB_START: | |
2628 | case JOB_VERIFY_ACTIVE: | |
2629 | ||
2630 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
2631 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2632 | else if (j->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
2633 | unexpected = true; | |
2634 | ||
31cd5f63 AZ |
2635 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
2636 | if (ns == UNIT_FAILED) | |
2637 | result = JOB_FAILED; | |
31cd5f63 AZ |
2638 | else |
2639 | result = JOB_DONE; | |
2640 | ||
2641 | job_finish_and_invalidate(j, result, true, false); | |
2642 | } | |
16c74914 LP |
2643 | } |
2644 | ||
2645 | break; | |
2646 | ||
2647 | case JOB_RELOAD: | |
2648 | case JOB_RELOAD_OR_START: | |
2649 | case JOB_TRY_RELOAD: | |
2650 | ||
2651 | if (j->state == JOB_RUNNING) { | |
2652 | if (ns == UNIT_ACTIVE) | |
96b09de5 | 2653 | job_finish_and_invalidate(j, reload_success ? JOB_DONE : JOB_FAILED, true, false); |
16c74914 LP |
2654 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { |
2655 | unexpected = true; | |
2656 | ||
2657 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2658 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2659 | } | |
2660 | } | |
2661 | ||
2662 | break; | |
2663 | ||
2664 | case JOB_STOP: | |
2665 | case JOB_RESTART: | |
2666 | case JOB_TRY_RESTART: | |
2667 | ||
2668 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2669 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2670 | else if (j->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
2671 | unexpected = true; | |
2672 | job_finish_and_invalidate(j, JOB_FAILED, true, false); | |
2673 | } | |
2674 | ||
2675 | break; | |
2676 | ||
2677 | default: | |
04499a70 | 2678 | assert_not_reached(); |
16c74914 LP |
2679 | } |
2680 | ||
2681 | return unexpected; | |
2682 | } | |
2683 | ||
96b09de5 | 2684 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
429926e9 | 2685 | const char *reason; |
8559b3b7 | 2686 | Manager *m; |
a096ed36 | 2687 | |
87f0e418 LP |
2688 | assert(u); |
2689 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2690 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2691 | |
8559b3b7 LP |
2692 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2693 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2694 | * remounted this function will be called too! */ | |
87f0e418 | 2695 | |
546ac4f0 MS |
2696 | m = u->manager; |
2697 | ||
3c4832ad LP |
2698 | /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in |
2699 | * the bus queue, so that any job change signal queued will force out the unit change signal first. */ | |
2700 | unit_add_to_dbus_queue(u); | |
2701 | ||
e30bbc90 AZ |
2702 | /* Update systemd-oomd on the property/state change */ |
2703 | if (os != ns) { | |
2704 | /* Always send an update if the unit is going into an inactive state so systemd-oomd knows to stop | |
2705 | * monitoring. | |
2706 | * Also send an update whenever the unit goes active; this is to handle a case where an override file | |
2707 | * sets one of the ManagedOOM*= properties to "kill", then later removes it. systemd-oomd needs to | |
2708 | * know to stop monitoring when the unit changes from "kill" -> "auto" on daemon-reload, but we don't | |
2709 | * have the information on the property. Thus, indiscriminately send an update. */ | |
f561e8c6 | 2710 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) || UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
e30bbc90 AZ |
2711 | (void) manager_varlink_send_managed_oom_update(u); |
2712 | } | |
2713 | ||
f755e3b7 | 2714 | /* Update timestamps for state changes */ |
2c289ea8 | 2715 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2716 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2717 | |
bdbf9951 | 2718 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2719 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2720 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2721 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2722 | |
2723 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2724 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2725 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2726 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2727 | } |
87f0e418 | 2728 | |
865cc19a | 2729 | /* Keep track of failed units */ |
8724defe | 2730 | (void) manager_update_failed_units(m, u, ns == UNIT_FAILED); |
f755e3b7 | 2731 | |
d3070fbd LP |
2732 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2733 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
ff68472a ZJS |
2734 | SET_FLAG(u->markers, |
2735 | (1u << UNIT_MARKER_NEEDS_RELOAD)|(1u << UNIT_MARKER_NEEDS_RESTART), | |
2736 | false); | |
efdb0237 | 2737 | unit_prune_cgroup(u); |
d3070fbd | 2738 | unit_unlink_state_files(u); |
ff68472a ZJS |
2739 | } else if (ns != os && ns == UNIT_RELOADING) |
2740 | SET_FLAG(u->markers, 1u << UNIT_MARKER_NEEDS_RELOAD, false); | |
fb385181 | 2741 | |
adefcf28 | 2742 | unit_update_on_console(u); |
7ed9f6cd | 2743 | |
2c289ea8 | 2744 | if (!MANAGER_IS_RELOADING(m)) { |
a1c7334b LP |
2745 | bool unexpected; |
2746 | ||
2747 | /* Let's propagate state changes to the job */ | |
2748 | if (u->job) | |
96b09de5 | 2749 | unexpected = unit_process_job(u->job, ns, reload_success); |
a1c7334b LP |
2750 | else |
2751 | unexpected = true; | |
f3bff0eb | 2752 | |
a1c7334b LP |
2753 | /* If this state change happened without being requested by a job, then let's retroactively start or |
2754 | * stop dependencies. We skip that step when deserializing, since we don't want to create any | |
2755 | * additional jobs just because something is already activated. */ | |
bdbf9951 LP |
2756 | |
2757 | if (unexpected) { | |
2758 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2759 | retroactively_start_dependencies(u); | |
2760 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2761 | retroactively_stop_dependencies(u); | |
2762 | } | |
5de9682c | 2763 | |
bdbf9951 | 2764 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2765 | log_unit_debug(u, "Unit entered failed state."); |
49b34f75 | 2766 | unit_start_on_failure(u, "OnFailure=", UNIT_ATOM_ON_FAILURE, u->on_failure_job_mode); |
cd6d0a45 | 2767 | } |
e537352b | 2768 | |
256f65d0 LP |
2769 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns) && !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
2770 | /* This unit just finished starting up */ | |
3b2775c5 | 2771 | |
6eb65e7c | 2772 | unit_emit_audit_start(u); |
546ac4f0 | 2773 | manager_send_unit_plymouth(m, u); |
256f65d0 | 2774 | } |
bdbf9951 | 2775 | |
256f65d0 | 2776 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && !UNIT_IS_INACTIVE_OR_FAILED(os)) { |
915b1d01 | 2777 | /* This unit just stopped/failed. */ |
256f65d0 | 2778 | |
6eb65e7c | 2779 | unit_emit_audit_stop(u, ns); |
915b1d01 | 2780 | unit_log_resources(u); |
cd6d0a45 | 2781 | } |
294446dc | 2782 | |
49b34f75 | 2783 | if (ns == UNIT_INACTIVE && !IN_SET(os, UNIT_FAILED, UNIT_INACTIVE, UNIT_MAINTENANCE)) |
294446dc | 2784 | unit_start_on_failure(u, "OnSuccess=", UNIT_ATOM_ON_SUCCESS, u->on_success_job_mode); |
f278026d LP |
2785 | } |
2786 | ||
31dc1ca3 LP |
2787 | manager_recheck_journal(m); |
2788 | manager_recheck_dbus(m); | |
e63ebf71 | 2789 | |
3ecaa09b | 2790 | unit_trigger_notify(u); |
3b2775c5 | 2791 | |
8724defe | 2792 | if (!MANAGER_IS_RELOADING(m)) { |
429926e9 TR |
2793 | if (os != UNIT_FAILED && ns == UNIT_FAILED) { |
2794 | reason = strjoina("unit ", u->id, " failed"); | |
36c4dc08 | 2795 | emergency_action(m, u->failure_action, 0, u->reboot_arg, unit_failure_action_exit_status(u), reason); |
429926e9 TR |
2796 | } else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) { |
2797 | reason = strjoina("unit ", u->id, " succeeded"); | |
36c4dc08 | 2798 | emergency_action(m, u->success_action, 0, u->reboot_arg, unit_success_action_exit_status(u), reason); |
429926e9 | 2799 | } |
ff502445 LP |
2800 | } |
2801 | ||
99e9af25 | 2802 | /* And now, add the unit or depending units to various queues that will act on the new situation if |
48008c1c | 2803 | * needed. These queues generally check for continuous state changes rather than events (like most of |
99e9af25 LP |
2804 | * the state propagation above), and do work deferred instead of instantly, since they typically |
2805 | * don't want to run during reloading, and usually involve checking combined state of multiple units | |
2806 | * at once. */ | |
2807 | ||
2808 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
2809 | /* Stop unneeded units and bound-by units regardless if going down was expected or not */ | |
2810 | check_unneeded_dependencies(u); | |
2811 | check_bound_by_dependencies(u); | |
2812 | ||
2813 | /* Maybe someone wants us to remain up? */ | |
2814 | unit_submit_to_start_when_upheld_queue(u); | |
2815 | ||
2816 | /* Maybe the unit should be GC'ed now? */ | |
2817 | unit_add_to_gc_queue(u); | |
6ac62d61 LP |
2818 | |
2819 | /* Maybe we can release some resources now? */ | |
2820 | unit_submit_to_release_resources_queue(u); | |
99e9af25 LP |
2821 | } |
2822 | ||
2823 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
2824 | /* Start uphold units regardless if going up was expected or not */ | |
2825 | check_uphold_dependencies(u); | |
2826 | ||
2827 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ | |
2828 | unit_submit_to_stop_when_unneeded_queue(u); | |
2829 | ||
2830 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens | |
2831 | * when something BindsTo= to a Type=oneshot unit, as these units go directly from starting to | |
2832 | * inactive, without ever entering started.) */ | |
2833 | unit_submit_to_stop_when_bound_queue(u); | |
2834 | } | |
87f0e418 LP |
2835 | } |
2836 | ||
495e75ed LP |
2837 | int unit_watch_pidref(Unit *u, PidRef *pid, bool exclusive) { |
2838 | _cleanup_(pidref_freep) PidRef *pid_dup = NULL; | |
62a76913 | 2839 | int r; |
a911bb9a | 2840 | |
495e75ed | 2841 | /* Adds a specific PID to the set of PIDs this unit watches. */ |
87f0e418 | 2842 | |
495e75ed LP |
2843 | assert(u); |
2844 | assert(pidref_is_set(pid)); | |
5ba6985b | 2845 | |
f75f613d FB |
2846 | /* Caller might be sure that this PID belongs to this unit only. Let's take this |
2847 | * opportunity to remove any stalled references to this PID as they can be created | |
2848 | * easily (when watching a process which is not our direct child). */ | |
2849 | if (exclusive) | |
495e75ed LP |
2850 | manager_unwatch_pidref(u->manager, pid); |
2851 | ||
2852 | if (set_contains(u->pids, pid)) /* early exit if already being watched */ | |
2853 | return 0; | |
f75f613d | 2854 | |
495e75ed | 2855 | r = pidref_dup(pid, &pid_dup); |
5ba6985b LP |
2856 | if (r < 0) |
2857 | return r; | |
2858 | ||
495e75ed LP |
2859 | /* First, insert into the set of PIDs maintained by the unit */ |
2860 | r = set_ensure_put(&u->pids, &pidref_hash_ops, pid_dup); | |
a911bb9a LP |
2861 | if (r < 0) |
2862 | return r; | |
2863 | ||
495e75ed | 2864 | pid = TAKE_PTR(pid_dup); /* continue with our copy now that we have installed it properly in our set */ |
05e343b7 | 2865 | |
495e75ed LP |
2866 | /* Second, insert it into the simple global table, see if that works */ |
2867 | r = hashmap_ensure_put(&u->manager->watch_pids, &pidref_hash_ops, pid, u); | |
2868 | if (r != -EEXIST) | |
2869 | return r; | |
a911bb9a | 2870 | |
495e75ed LP |
2871 | /* OK, the key is already assigned to a different unit. That's fine, then add us via the second |
2872 | * hashmap that points to an array. */ | |
a911bb9a | 2873 | |
495e75ed LP |
2874 | PidRef *old_pid = NULL; |
2875 | Unit **array = hashmap_get2(u->manager->watch_pids_more, pid, (void**) &old_pid); | |
62a76913 | 2876 | |
495e75ed LP |
2877 | /* Count entries in array */ |
2878 | size_t n = 0; | |
2879 | for (; array && array[n]; n++) | |
2880 | ; | |
62a76913 | 2881 | |
495e75ed LP |
2882 | /* Allocate a new array */ |
2883 | _cleanup_free_ Unit **new_array = new(Unit*, n + 2); | |
2884 | if (!new_array) | |
2885 | return -ENOMEM; | |
62a76913 | 2886 | |
495e75ed LP |
2887 | /* Append us to the end */ |
2888 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2889 | new_array[n] = u; | |
2890 | new_array[n+1] = NULL; | |
62a76913 | 2891 | |
495e75ed LP |
2892 | /* Make sure the hashmap is allocated */ |
2893 | r = hashmap_ensure_allocated(&u->manager->watch_pids_more, &pidref_hash_ops); | |
2894 | if (r < 0) | |
62a76913 LP |
2895 | return r; |
2896 | ||
495e75ed LP |
2897 | /* Add or replace the old array */ |
2898 | r = hashmap_replace(u->manager->watch_pids_more, old_pid ?: pid, new_array); | |
62a76913 LP |
2899 | if (r < 0) |
2900 | return r; | |
2901 | ||
495e75ed LP |
2902 | TAKE_PTR(new_array); /* Now part of the hash table */ |
2903 | free(array); /* Which means we can now delete the old version */ | |
62a76913 | 2904 | return 0; |
87f0e418 LP |
2905 | } |
2906 | ||
495e75ed LP |
2907 | int unit_watch_pid(Unit *u, pid_t pid, bool exclusive) { |
2908 | _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL; | |
2909 | int r; | |
62a76913 | 2910 | |
87f0e418 | 2911 | assert(u); |
62a76913 LP |
2912 | assert(pid_is_valid(pid)); |
2913 | ||
495e75ed LP |
2914 | r = pidref_set_pid(&pidref, pid); |
2915 | if (r < 0) | |
2916 | return r; | |
62a76913 | 2917 | |
495e75ed LP |
2918 | return unit_watch_pidref(u, &pidref, exclusive); |
2919 | } | |
12375b95 | 2920 | |
495e75ed LP |
2921 | void unit_unwatch_pidref(Unit *u, PidRef *pid) { |
2922 | assert(u); | |
2923 | assert(pidref_is_set(pid)); | |
2924 | ||
2925 | /* Remove from the set we maintain for this unit. (And destroy the returned pid eventually) */ | |
2926 | _cleanup_(pidref_freep) PidRef *pid1 = set_remove(u->pids, pid); | |
2927 | if (!pid1) | |
2928 | return; /* Early exit if this PID was never watched by us */ | |
2929 | ||
2930 | /* First let's drop the unit from the simple hash table, if it is included there */ | |
2931 | PidRef *pid2 = NULL; | |
2932 | Unit *uu = hashmap_get2(u->manager->watch_pids, pid, (void**) &pid2); | |
2933 | ||
2934 | /* Quick validation: iff we are in the watch_pids table then the PidRef object must be the same as in our local pids set */ | |
2935 | assert((uu == u) == (pid1 == pid2)); | |
2936 | ||
2937 | if (uu == u) | |
2938 | /* OK, we are in the first table. Let's remove it there then, and we are done already. */ | |
2939 | assert_se(hashmap_remove_value(u->manager->watch_pids, pid2, uu) == uu); | |
2940 | else { | |
2941 | /* We weren't in the first table, then let's consult the 2nd table that points to an array */ | |
2942 | PidRef *pid3 = NULL; | |
2943 | Unit **array = hashmap_get2(u->manager->watch_pids_more, pid, (void**) &pid3); | |
2944 | ||
2945 | /* Let's iterate through the array, dropping our own entry */ | |
2946 | size_t m = 0, n = 0; | |
2947 | for (; array && array[n]; n++) | |
62a76913 LP |
2948 | if (array[n] != u) |
2949 | array[m++] = array[n]; | |
495e75ed LP |
2950 | if (n == m) |
2951 | return; /* Not there */ | |
2952 | ||
2953 | array[m] = NULL; /* set trailing NULL marker on the new end */ | |
62a76913 LP |
2954 | |
2955 | if (m == 0) { | |
2956 | /* The array is now empty, remove the entire entry */ | |
495e75ed | 2957 | assert_se(hashmap_remove_value(u->manager->watch_pids_more, pid3, array) == array); |
62a76913 | 2958 | free(array); |
495e75ed LP |
2959 | } else { |
2960 | /* The array is not empty, but let's make sure the entry is not keyed by the PidRef | |
2961 | * we will delete, but by the PidRef object of the Unit that is now first in the | |
2962 | * array. */ | |
2963 | ||
2964 | PidRef *new_pid3 = ASSERT_PTR(set_get(array[0]->pids, pid)); | |
2965 | assert_se(hashmap_replace(u->manager->watch_pids_more, new_pid3, array) >= 0); | |
62a76913 LP |
2966 | } |
2967 | } | |
495e75ed | 2968 | } |
87f0e418 | 2969 | |
495e75ed LP |
2970 | void unit_unwatch_pid(Unit *u, pid_t pid) { |
2971 | return unit_unwatch_pidref(u, &PIDREF_MAKE_FROM_PID(pid)); | |
a911bb9a LP |
2972 | } |
2973 | ||
bd44e61b LP |
2974 | void unit_unwatch_all_pids(Unit *u) { |
2975 | assert(u); | |
2976 | ||
2977 | while (!set_isempty(u->pids)) | |
495e75ed | 2978 | unit_unwatch_pidref(u, set_first(u->pids)); |
bd44e61b | 2979 | |
efdb0237 | 2980 | u->pids = set_free(u->pids); |
a911bb9a LP |
2981 | } |
2982 | ||
50be4f4a | 2983 | static void unit_tidy_watch_pids(Unit *u) { |
495e75ed | 2984 | PidRef *except1, *except2, *e; |
a911bb9a LP |
2985 | |
2986 | assert(u); | |
2987 | ||
2988 | /* Cleans dead PIDs from our list */ | |
2989 | ||
50be4f4a LP |
2990 | except1 = unit_main_pid(u); |
2991 | except2 = unit_control_pid(u); | |
2992 | ||
90e74a66 | 2993 | SET_FOREACH(e, u->pids) { |
495e75ed | 2994 | if (pidref_equal(except1, e) || pidref_equal(except2, e)) |
a911bb9a LP |
2995 | continue; |
2996 | ||
495e75ed LP |
2997 | if (!pid_is_unwaited(e->pid)) |
2998 | unit_unwatch_pidref(u, e); | |
a911bb9a | 2999 | } |
87f0e418 LP |
3000 | } |
3001 | ||
50be4f4a | 3002 | static int on_rewatch_pids_event(sd_event_source *s, void *userdata) { |
99534007 | 3003 | Unit *u = ASSERT_PTR(userdata); |
50be4f4a LP |
3004 | |
3005 | assert(s); | |
50be4f4a LP |
3006 | |
3007 | unit_tidy_watch_pids(u); | |
3008 | unit_watch_all_pids(u); | |
3009 | ||
3010 | /* If the PID set is empty now, then let's finish this off. */ | |
3011 | unit_synthesize_cgroup_empty_event(u); | |
3012 | ||
3013 | return 0; | |
3014 | } | |
3015 | ||
3016 | int unit_enqueue_rewatch_pids(Unit *u) { | |
3017 | int r; | |
3018 | ||
3019 | assert(u); | |
3020 | ||
3021 | if (!u->cgroup_path) | |
3022 | return -ENOENT; | |
3023 | ||
3024 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
3025 | if (r < 0) | |
3026 | return r; | |
3027 | if (r > 0) /* On unified we can use proper notifications */ | |
3028 | return 0; | |
3029 | ||
3030 | /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new | |
3031 | * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it | |
3032 | * involves issuing kill(pid, 0) on all processes we watch. */ | |
3033 | ||
3034 | if (!u->rewatch_pids_event_source) { | |
3035 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
3036 | ||
3037 | r = sd_event_add_defer(u->manager->event, &s, on_rewatch_pids_event, u); | |
3038 | if (r < 0) | |
3039 | return log_error_errno(r, "Failed to allocate event source for tidying watched PIDs: %m"); | |
3040 | ||
3041 | r = sd_event_source_set_priority(s, SD_EVENT_PRIORITY_IDLE); | |
3042 | if (r < 0) | |
28b77ab2 | 3043 | return log_error_errno(r, "Failed to adjust priority of event source for tidying watched PIDs: %m"); |
50be4f4a LP |
3044 | |
3045 | (void) sd_event_source_set_description(s, "tidy-watch-pids"); | |
3046 | ||
3047 | u->rewatch_pids_event_source = TAKE_PTR(s); | |
3048 | } | |
3049 | ||
3050 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_ONESHOT); | |
3051 | if (r < 0) | |
3052 | return log_error_errno(r, "Failed to enable event source for tidying watched PIDs: %m"); | |
3053 | ||
3054 | return 0; | |
3055 | } | |
3056 | ||
3057 | void unit_dequeue_rewatch_pids(Unit *u) { | |
3058 | int r; | |
3059 | assert(u); | |
3060 | ||
3061 | if (!u->rewatch_pids_event_source) | |
3062 | return; | |
3063 | ||
3064 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_OFF); | |
3065 | if (r < 0) | |
3066 | log_warning_errno(r, "Failed to disable event source for tidying watched PIDs, ignoring: %m"); | |
3067 | ||
5dcadb4c | 3068 | u->rewatch_pids_event_source = sd_event_source_disable_unref(u->rewatch_pids_event_source); |
50be4f4a LP |
3069 | } |
3070 | ||
87f0e418 LP |
3071 | bool unit_job_is_applicable(Unit *u, JobType j) { |
3072 | assert(u); | |
3073 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
3074 | ||
3075 | switch (j) { | |
3076 | ||
3077 | case JOB_VERIFY_ACTIVE: | |
3078 | case JOB_START: | |
e0209d83 | 3079 | case JOB_NOP: |
f5869324 | 3080 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
86b52a39 | 3081 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueuing |
f5869324 | 3082 | * jobs for it. */ |
87f0e418 LP |
3083 | return true; |
3084 | ||
f5869324 LP |
3085 | case JOB_STOP: |
3086 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
86b52a39 | 3087 | * external events), hence it makes no sense to permit enqueuing such a request either. */ |
f5869324 LP |
3088 | return !u->perpetual; |
3089 | ||
87f0e418 LP |
3090 | case JOB_RESTART: |
3091 | case JOB_TRY_RESTART: | |
f5869324 | 3092 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
3093 | |
3094 | case JOB_RELOAD: | |
3282591d | 3095 | case JOB_TRY_RELOAD: |
87f0e418 LP |
3096 | return unit_can_reload(u); |
3097 | ||
3098 | case JOB_RELOAD_OR_START: | |
3099 | return unit_can_reload(u) && unit_can_start(u); | |
3100 | ||
3101 | default: | |
04499a70 | 3102 | assert_not_reached(); |
87f0e418 LP |
3103 | } |
3104 | } | |
3105 | ||
83110824 YW |
3106 | static Hashmap *unit_get_dependency_hashmap_per_type(Unit *u, UnitDependency d) { |
3107 | Hashmap *deps; | |
3108 | ||
3109 | assert(u); | |
3110 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
3111 | ||
3112 | deps = hashmap_get(u->dependencies, UNIT_DEPENDENCY_TO_PTR(d)); | |
3113 | if (!deps) { | |
3114 | _cleanup_hashmap_free_ Hashmap *h = NULL; | |
3115 | ||
3116 | h = hashmap_new(NULL); | |
3117 | if (!h) | |
3118 | return NULL; | |
3119 | ||
3120 | if (hashmap_ensure_put(&u->dependencies, NULL, UNIT_DEPENDENCY_TO_PTR(d), h) < 0) | |
3121 | return NULL; | |
3122 | ||
3123 | deps = TAKE_PTR(h); | |
3124 | } | |
3125 | ||
3126 | return deps; | |
3127 | } | |
3128 | ||
3129 | typedef enum NotifyDependencyFlags { | |
3130 | NOTIFY_DEPENDENCY_UPDATE_FROM = 1 << 0, | |
3131 | NOTIFY_DEPENDENCY_UPDATE_TO = 1 << 1, | |
3132 | } NotifyDependencyFlags; | |
3133 | ||
3134 | static int unit_add_dependency_impl( | |
eef85c4a LP |
3135 | Unit *u, |
3136 | UnitDependency d, | |
3137 | Unit *other, | |
eef85c4a | 3138 | UnitDependencyMask mask) { |
87f0e418 LP |
3139 | |
3140 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
fb138166 ZJS |
3141 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, |
3142 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, | |
3143 | [UNIT_WANTS] = UNIT_WANTED_BY, | |
3144 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, | |
3145 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, | |
3146 | [UNIT_UPHOLDS] = UNIT_UPHELD_BY, | |
3147 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, | |
3148 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, | |
3149 | [UNIT_WANTED_BY] = UNIT_WANTS, | |
3150 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, | |
3151 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, | |
3152 | [UNIT_UPHELD_BY] = UNIT_UPHOLDS, | |
3153 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, | |
3154 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
3155 | [UNIT_BEFORE] = UNIT_AFTER, | |
3156 | [UNIT_AFTER] = UNIT_BEFORE, | |
3157 | [UNIT_ON_SUCCESS] = UNIT_ON_SUCCESS_OF, | |
3158 | [UNIT_ON_SUCCESS_OF] = UNIT_ON_SUCCESS, | |
3159 | [UNIT_ON_FAILURE] = UNIT_ON_FAILURE_OF, | |
3160 | [UNIT_ON_FAILURE_OF] = UNIT_ON_FAILURE, | |
3161 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
3162 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, | |
3163 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, | |
85e9a101 | 3164 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
fb138166 ZJS |
3165 | [UNIT_PROPAGATES_STOP_TO] = UNIT_STOP_PROPAGATED_FROM, |
3166 | [UNIT_STOP_PROPAGATED_FROM] = UNIT_PROPAGATES_STOP_TO, | |
3167 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, /* symmetric! 👓 */ | |
3168 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, | |
3169 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, | |
3170 | [UNIT_IN_SLICE] = UNIT_SLICE_OF, | |
3171 | [UNIT_SLICE_OF] = UNIT_IN_SLICE, | |
87f0e418 | 3172 | }; |
83110824 YW |
3173 | |
3174 | Hashmap *u_deps, *other_deps; | |
3175 | UnitDependencyInfo u_info, u_info_old, other_info, other_info_old; | |
3176 | NotifyDependencyFlags flags = 0; | |
3177 | int r; | |
3178 | ||
3179 | assert(u); | |
3180 | assert(other); | |
3181 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
3182 | assert(inverse_table[d] >= 0 && inverse_table[d] < _UNIT_DEPENDENCY_MAX); | |
3183 | assert(mask > 0 && mask < _UNIT_DEPENDENCY_MASK_FULL); | |
3184 | ||
3185 | /* Ensure the following two hashmaps for each unit exist: | |
3186 | * - the top-level dependency hashmap that maps UnitDependency → Hashmap(Unit* → UnitDependencyInfo), | |
3187 | * - the inner hashmap, that maps Unit* → UnitDependencyInfo, for the specified dependency type. */ | |
3188 | u_deps = unit_get_dependency_hashmap_per_type(u, d); | |
3189 | if (!u_deps) | |
3190 | return -ENOMEM; | |
3191 | ||
3192 | other_deps = unit_get_dependency_hashmap_per_type(other, inverse_table[d]); | |
3193 | if (!other_deps) | |
3194 | return -ENOMEM; | |
3195 | ||
3196 | /* Save the original dependency info. */ | |
3197 | u_info.data = u_info_old.data = hashmap_get(u_deps, other); | |
3198 | other_info.data = other_info_old.data = hashmap_get(other_deps, u); | |
3199 | ||
3200 | /* Update dependency info. */ | |
3201 | u_info.origin_mask |= mask; | |
3202 | other_info.destination_mask |= mask; | |
3203 | ||
3204 | /* Save updated dependency info. */ | |
3205 | if (u_info.data != u_info_old.data) { | |
3206 | r = hashmap_replace(u_deps, other, u_info.data); | |
3207 | if (r < 0) | |
3208 | return r; | |
3209 | ||
3210 | flags = NOTIFY_DEPENDENCY_UPDATE_FROM; | |
3211 | } | |
3212 | ||
3213 | if (other_info.data != other_info_old.data) { | |
3214 | r = hashmap_replace(other_deps, u, other_info.data); | |
3215 | if (r < 0) { | |
3216 | if (u_info.data != u_info_old.data) { | |
3217 | /* Restore the old dependency. */ | |
3218 | if (u_info_old.data) | |
3219 | (void) hashmap_update(u_deps, other, u_info_old.data); | |
3220 | else | |
3221 | hashmap_remove(u_deps, other); | |
3222 | } | |
3223 | return r; | |
3224 | } | |
3225 | ||
3226 | flags |= NOTIFY_DEPENDENCY_UPDATE_TO; | |
3227 | } | |
3228 | ||
3229 | return flags; | |
3230 | } | |
3231 | ||
3232 | int unit_add_dependency( | |
3233 | Unit *u, | |
3234 | UnitDependency d, | |
3235 | Unit *other, | |
3236 | bool add_reference, | |
3237 | UnitDependencyMask mask) { | |
3238 | ||
15ed3c3a | 3239 | UnitDependencyAtom a; |
eef85c4a | 3240 | int r; |
15ed3c3a LP |
3241 | |
3242 | /* Helper to know whether sending a notification is necessary or not: if the dependency is already | |
3243 | * there, no need to notify! */ | |
83110824 | 3244 | NotifyDependencyFlags notify_flags; |
87f0e418 LP |
3245 | |
3246 | assert(u); | |
3247 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
3248 | assert(other); |
3249 | ||
9f151f29 LP |
3250 | u = unit_follow_merge(u); |
3251 | other = unit_follow_merge(other); | |
15ed3c3a LP |
3252 | a = unit_dependency_to_atom(d); |
3253 | assert(a >= 0); | |
9f151f29 | 3254 | |
15ed3c3a | 3255 | /* We won't allow dependencies on ourselves. We will not consider them an error however. */ |
d1fab3fe | 3256 | if (u == other) { |
ed991163 YW |
3257 | if (unit_should_warn_about_dependency(d)) |
3258 | log_unit_warning(u, "Dependency %s=%s is dropped.", | |
3259 | unit_dependency_to_string(d), u->id); | |
87f0e418 | 3260 | return 0; |
d1fab3fe | 3261 | } |
87f0e418 | 3262 | |
f14d6810 MG |
3263 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3264 | return 0; | |
3265 | ||
15ed3c3a LP |
3266 | /* Note that ordering a device unit after a unit is permitted since it allows to start its job |
3267 | * running timeout at a specific time. */ | |
3268 | if (FLAGS_SET(a, UNIT_ATOM_BEFORE) && other->type == UNIT_DEVICE) { | |
b862c257 | 3269 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
c80a9a33 LP |
3270 | return 0; |
3271 | } | |
3272 | ||
15ed3c3a | 3273 | if (FLAGS_SET(a, UNIT_ATOM_ON_FAILURE) && !UNIT_VTABLE(u)->can_fail) { |
c80a9a33 LP |
3274 | log_unit_warning(u, "Requested dependency OnFailure=%s ignored (%s units cannot fail).", other->id, unit_type_to_string(u->type)); |
3275 | return 0; | |
3276 | } | |
3277 | ||
15ed3c3a | 3278 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERS) && !UNIT_VTABLE(u)->can_trigger) |
c80a9a33 LP |
3279 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3280 | "Requested dependency Triggers=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(u->type)); | |
15ed3c3a | 3281 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERED_BY) && !UNIT_VTABLE(other)->can_trigger) |
c80a9a33 LP |
3282 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3283 | "Requested dependency TriggeredBy=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(other->type)); | |
3284 | ||
d219a2b0 LP |
3285 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && other->type != UNIT_SLICE) |
3286 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3287 | "Requested dependency Slice=%s refused (%s is not a slice unit).", other->id, other->id); | |
3288 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && u->type != UNIT_SLICE) | |
3289 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3290 | "Requested dependency SliceOf=%s refused (%s is not a slice unit).", other->id, u->id); | |
3291 | ||
3292 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && !UNIT_HAS_CGROUP_CONTEXT(u)) | |
3293 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3294 | "Requested dependency Slice=%s refused (%s is not a cgroup unit).", other->id, u->id); | |
3295 | ||
3296 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && !UNIT_HAS_CGROUP_CONTEXT(other)) | |
3297 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3298 | "Requested dependency SliceOf=%s refused (%s is not a cgroup unit).", other->id, other->id); | |
3299 | ||
83110824 | 3300 | r = unit_add_dependency_impl(u, d, other, mask); |
613b411c | 3301 | if (r < 0) |
87f0e418 | 3302 | return r; |
83110824 | 3303 | notify_flags = r; |
613b411c LP |
3304 | |
3305 | if (add_reference) { | |
83110824 | 3306 | r = unit_add_dependency_impl(u, UNIT_REFERENCES, other, mask); |
613b411c | 3307 | if (r < 0) |
701cc384 | 3308 | return r; |
83110824 | 3309 | notify_flags |= r; |
613b411c | 3310 | } |
87f0e418 | 3311 | |
83110824 | 3312 | if (FLAGS_SET(notify_flags, NOTIFY_DEPENDENCY_UPDATE_FROM)) |
5177cb0a | 3313 | unit_add_to_dbus_queue(u); |
83110824 | 3314 | if (FLAGS_SET(notify_flags, NOTIFY_DEPENDENCY_UPDATE_TO)) |
ac17080c | 3315 | unit_add_to_dbus_queue(other); |
15ed3c3a | 3316 | |
83110824 | 3317 | return notify_flags != 0; |
87f0e418 | 3318 | } |
0301abf4 | 3319 | |
eef85c4a | 3320 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
5ee8e988 | 3321 | int r = 0, s = 0; |
2c966c03 LP |
3322 | |
3323 | assert(u); | |
5ee8e988 | 3324 | assert(d >= 0 || e >= 0); |
2c966c03 | 3325 | |
5ee8e988 LB |
3326 | if (d >= 0) { |
3327 | r = unit_add_dependency(u, d, other, add_reference, mask); | |
3328 | if (r < 0) | |
3329 | return r; | |
3330 | } | |
2c966c03 | 3331 | |
5ee8e988 LB |
3332 | if (e >= 0) { |
3333 | s = unit_add_dependency(u, e, other, add_reference, mask); | |
3334 | if (s < 0) | |
3335 | return s; | |
3336 | } | |
a8c5a4c6 YW |
3337 | |
3338 | return r > 0 || s > 0; | |
2c966c03 LP |
3339 | } |
3340 | ||
23e8c796 | 3341 | static int resolve_template(Unit *u, const char *name, char **buf, const char **ret) { |
7410616c | 3342 | int r; |
9e2f7c11 LP |
3343 | |
3344 | assert(u); | |
23e8c796 | 3345 | assert(name); |
7410616c LP |
3346 | assert(buf); |
3347 | assert(ret); | |
9e2f7c11 | 3348 | |
7410616c LP |
3349 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
3350 | *buf = NULL; | |
3351 | *ret = name; | |
3352 | return 0; | |
9e2f7c11 LP |
3353 | } |
3354 | ||
ac155bb8 | 3355 | if (u->instance) |
7410616c | 3356 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 3357 | else { |
ae018d9b | 3358 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 3359 | |
7410616c LP |
3360 | r = unit_name_to_prefix(u->id, &i); |
3361 | if (r < 0) | |
3362 | return r; | |
9e2f7c11 | 3363 | |
7410616c | 3364 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 3365 | } |
7410616c LP |
3366 | if (r < 0) |
3367 | return r; | |
9e2f7c11 | 3368 | |
7410616c LP |
3369 | *ret = *buf; |
3370 | return 0; | |
9e2f7c11 LP |
3371 | } |
3372 | ||
35d8c19a | 3373 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3374 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
3375 | Unit *other; |
3376 | int r; | |
3377 | ||
9e2f7c11 | 3378 | assert(u); |
35d8c19a | 3379 | assert(name); |
09b6b09f | 3380 | |
23e8c796 | 3381 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3382 | if (r < 0) |
3383 | return r; | |
09b6b09f | 3384 | |
f14d6810 MG |
3385 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3386 | return 0; | |
3387 | ||
35d8c19a | 3388 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
8afbb8e1 LP |
3389 | if (r < 0) |
3390 | return r; | |
9e2f7c11 | 3391 | |
eef85c4a | 3392 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
3393 | } |
3394 | ||
5a724170 | 3395 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3396 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
3397 | Unit *other; |
3398 | int r; | |
2c966c03 LP |
3399 | |
3400 | assert(u); | |
5a724170 | 3401 | assert(name); |
2c966c03 | 3402 | |
23e8c796 | 3403 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3404 | if (r < 0) |
3405 | return r; | |
2c966c03 | 3406 | |
f14d6810 MG |
3407 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3408 | return 0; | |
3409 | ||
5a724170 | 3410 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
3f3cc397 | 3411 | if (r < 0) |
68eda4bd | 3412 | return r; |
2c966c03 | 3413 | |
eef85c4a | 3414 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
3415 | } |
3416 | ||
0301abf4 | 3417 | int set_unit_path(const char *p) { |
0301abf4 | 3418 | /* This is mostly for debug purposes */ |
7c248223 | 3419 | return RET_NERRNO(setenv("SYSTEMD_UNIT_PATH", p, 1)); |
0301abf4 | 3420 | } |
88066b3a | 3421 | |
ea430986 | 3422 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
3423 | assert(u); |
3424 | ||
ac155bb8 | 3425 | if (!u->id) |
04ade7d2 LP |
3426 | return NULL; |
3427 | ||
48899192 | 3428 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
3429 | } |
3430 | ||
4b58153d LP |
3431 | char *unit_dbus_path_invocation_id(Unit *u) { |
3432 | assert(u); | |
3433 | ||
3434 | if (sd_id128_is_null(u->invocation_id)) | |
3435 | return NULL; | |
3436 | ||
3437 | return unit_dbus_path_from_name(u->invocation_id_string); | |
3438 | } | |
3439 | ||
2d3b784d | 3440 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { |
db868d45 ZJS |
3441 | int r; |
3442 | ||
3443 | assert(u); | |
3444 | ||
3445 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
3446 | ||
3447 | if (sd_id128_equal(u->invocation_id, id)) | |
3448 | return 0; | |
3449 | ||
3450 | if (!sd_id128_is_null(u->invocation_id)) | |
3451 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3452 | ||
3453 | if (sd_id128_is_null(id)) { | |
3454 | r = 0; | |
3455 | goto reset; | |
3456 | } | |
3457 | ||
3458 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
3459 | if (r < 0) | |
3460 | goto reset; | |
3461 | ||
3462 | u->invocation_id = id; | |
3463 | sd_id128_to_string(id, u->invocation_id_string); | |
3464 | ||
3465 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3466 | if (r < 0) | |
3467 | goto reset; | |
3468 | ||
3469 | return 0; | |
3470 | ||
3471 | reset: | |
3472 | u->invocation_id = SD_ID128_NULL; | |
3473 | u->invocation_id_string[0] = 0; | |
3474 | return r; | |
3475 | } | |
3476 | ||
899acf5c | 3477 | int unit_set_slice(Unit *u, Unit *slice) { |
d219a2b0 LP |
3478 | int r; |
3479 | ||
d79200e2 LP |
3480 | assert(u); |
3481 | assert(slice); | |
3482 | ||
d219a2b0 LP |
3483 | /* Sets the unit slice if it has not been set before. Is extra careful, to only allow this for units |
3484 | * that actually have a cgroup context. Also, we don't allow to set this for slices (since the parent | |
3485 | * slice is derived from the name). Make sure the unit we set is actually a slice. */ | |
d79200e2 LP |
3486 | |
3487 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3488 | return -EOPNOTSUPP; | |
3489 | ||
3490 | if (u->type == UNIT_SLICE) | |
3491 | return -EINVAL; | |
3492 | ||
102ef982 LP |
3493 | if (unit_active_state(u) != UNIT_INACTIVE) |
3494 | return -EBUSY; | |
3495 | ||
d79200e2 LP |
3496 | if (slice->type != UNIT_SLICE) |
3497 | return -EINVAL; | |
3498 | ||
efdb0237 LP |
3499 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
3500 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
3501 | return -EPERM; | |
3502 | ||
12f64221 | 3503 | if (UNIT_GET_SLICE(u) == slice) |
d79200e2 LP |
3504 | return 0; |
3505 | ||
99e66921 | 3506 | /* Disallow slice changes if @u is already bound to cgroups */ |
12f64221 | 3507 | if (UNIT_GET_SLICE(u) && u->cgroup_realized) |
d79200e2 LP |
3508 | return -EBUSY; |
3509 | ||
899acf5c AZ |
3510 | /* Remove any slices assigned prior; we should only have one UNIT_IN_SLICE dependency */ |
3511 | if (UNIT_GET_SLICE(u)) | |
3512 | unit_remove_dependencies(u, UNIT_DEPENDENCY_SLICE_PROPERTY); | |
3513 | ||
3514 | r = unit_add_dependency(u, UNIT_IN_SLICE, slice, true, UNIT_DEPENDENCY_SLICE_PROPERTY); | |
d219a2b0 LP |
3515 | if (r < 0) |
3516 | return r; | |
3517 | ||
d79200e2 LP |
3518 | return 1; |
3519 | } | |
3520 | ||
3521 | int unit_set_default_slice(Unit *u) { | |
a8833944 | 3522 | const char *slice_name; |
a016b922 LP |
3523 | Unit *slice; |
3524 | int r; | |
3525 | ||
3526 | assert(u); | |
3527 | ||
f14d6810 MG |
3528 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3529 | return 0; | |
3530 | ||
12f64221 | 3531 | if (UNIT_GET_SLICE(u)) |
a016b922 LP |
3532 | return 0; |
3533 | ||
a8833944 LP |
3534 | if (u->instance) { |
3535 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 3536 | |
a8833944 LP |
3537 | /* Implicitly place all instantiated units in their |
3538 | * own per-template slice */ | |
3539 | ||
7410616c LP |
3540 | r = unit_name_to_prefix(u->id, &prefix); |
3541 | if (r < 0) | |
3542 | return r; | |
a8833944 LP |
3543 | |
3544 | /* The prefix is already escaped, but it might include | |
3545 | * "-" which has a special meaning for slice units, | |
3546 | * hence escape it here extra. */ | |
7410616c | 3547 | escaped = unit_name_escape(prefix); |
a8833944 LP |
3548 | if (!escaped) |
3549 | return -ENOMEM; | |
3550 | ||
463d0d15 | 3551 | if (MANAGER_IS_SYSTEM(u->manager)) |
00e7b3c8 | 3552 | slice_name = strjoina("system-", escaped, ".slice"); |
a8833944 | 3553 | else |
7f3b86a4 | 3554 | slice_name = strjoina("app-", escaped, ".slice"); |
5ee24fa0 ZJS |
3555 | |
3556 | } else if (unit_is_extrinsic(u)) | |
3557 | /* Keep all extrinsic units (e.g. perpetual units and swap and mount units in user mode) in | |
3558 | * the root slice. They don't really belong in one of the subslices. */ | |
3559 | slice_name = SPECIAL_ROOT_SLICE; | |
3560 | ||
3561 | else if (MANAGER_IS_SYSTEM(u->manager)) | |
3562 | slice_name = SPECIAL_SYSTEM_SLICE; | |
3563 | else | |
3564 | slice_name = SPECIAL_APP_SLICE; | |
a8833944 LP |
3565 | |
3566 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
3567 | if (r < 0) |
3568 | return r; | |
3569 | ||
899acf5c | 3570 | return unit_set_slice(u, slice); |
a016b922 LP |
3571 | } |
3572 | ||
9444b1f2 | 3573 | const char *unit_slice_name(Unit *u) { |
12f64221 | 3574 | Unit *slice; |
9444b1f2 LP |
3575 | assert(u); |
3576 | ||
12f64221 LP |
3577 | slice = UNIT_GET_SLICE(u); |
3578 | if (!slice) | |
9444b1f2 LP |
3579 | return NULL; |
3580 | ||
12f64221 | 3581 | return slice->id; |
9444b1f2 LP |
3582 | } |
3583 | ||
f6ff8c29 | 3584 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 3585 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
3586 | int r; |
3587 | ||
3588 | assert(u); | |
3589 | assert(type); | |
3590 | assert(_found); | |
3591 | ||
7410616c LP |
3592 | r = unit_name_change_suffix(u->id, type, &t); |
3593 | if (r < 0) | |
3594 | return r; | |
3595 | if (unit_has_name(u, t)) | |
3596 | return -EINVAL; | |
f6ff8c29 | 3597 | |
ac155bb8 | 3598 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3599 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3600 | return r; |
3601 | } | |
3602 | ||
bbc29086 | 3603 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
fc67a943 | 3604 | const char *new_owner; |
99534007 | 3605 | Unit *u = ASSERT_PTR(userdata); |
bbc29086 DM |
3606 | int r; |
3607 | ||
3608 | assert(message); | |
bbc29086 | 3609 | |
fc67a943 | 3610 | r = sd_bus_message_read(message, "sss", NULL, NULL, &new_owner); |
bbc29086 DM |
3611 | if (r < 0) { |
3612 | bus_log_parse_error(r); | |
3613 | return 0; | |
3614 | } | |
3615 | ||
3616 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3617 | UNIT_VTABLE(u)->bus_name_owner_change(u, empty_to_null(new_owner)); |
a5a8776a MJ |
3618 | |
3619 | return 0; | |
3620 | } | |
3621 | ||
3622 | static int get_name_owner_handler(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
3623 | const sd_bus_error *e; | |
3624 | const char *new_owner; | |
99534007 | 3625 | Unit *u = ASSERT_PTR(userdata); |
a5a8776a MJ |
3626 | int r; |
3627 | ||
3628 | assert(message); | |
a5a8776a MJ |
3629 | |
3630 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); | |
3631 | ||
a5a8776a | 3632 | e = sd_bus_message_get_error(message); |
a5a8776a | 3633 | if (e) { |
91053fc9 | 3634 | if (!sd_bus_error_has_name(e, SD_BUS_ERROR_NAME_HAS_NO_OWNER)) { |
33322185 YW |
3635 | r = sd_bus_error_get_errno(e); |
3636 | log_unit_error_errno(u, r, | |
3637 | "Unexpected error response from GetNameOwner(): %s", | |
3638 | bus_error_message(e, r)); | |
3639 | } | |
a5a8776a | 3640 | |
fc67a943 LP |
3641 | new_owner = NULL; |
3642 | } else { | |
3643 | r = sd_bus_message_read(message, "s", &new_owner); | |
3644 | if (r < 0) | |
3645 | return bus_log_parse_error(r); | |
a5a8776a | 3646 | |
fc67a943 LP |
3647 | assert(!isempty(new_owner)); |
3648 | } | |
a5a8776a MJ |
3649 | |
3650 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3651 | UNIT_VTABLE(u)->bus_name_owner_change(u, new_owner); |
bbc29086 DM |
3652 | |
3653 | return 0; | |
3654 | } | |
3655 | ||
9806e87d | 3656 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
8df433d7 | 3657 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
9806e87d | 3658 | const char *match; |
8df433d7 | 3659 | usec_t timeout_usec = 0; |
a5b07847 | 3660 | int r; |
bbc29086 | 3661 | |
9806e87d LP |
3662 | assert(u); |
3663 | assert(bus); | |
3664 | assert(name); | |
bbc29086 | 3665 | |
a5b07847 | 3666 | if (u->match_bus_slot || u->get_name_owner_slot) |
bbc29086 DM |
3667 | return -EBUSY; |
3668 | ||
8df433d7 | 3669 | /* NameOwnerChanged and GetNameOwner is used to detect when a service finished starting up. The dbus |
3670 | * call timeout shouldn't be earlier than that. If we couldn't get the start timeout, use the default | |
3671 | * value defined above. */ | |
3672 | if (UNIT_VTABLE(u)->get_timeout_start_usec) | |
3673 | timeout_usec = UNIT_VTABLE(u)->get_timeout_start_usec(u); | |
3674 | ||
9806e87d | 3675 | match = strjoina("type='signal'," |
81d62103 ZJS |
3676 | "sender='org.freedesktop.DBus'," |
3677 | "path='/org/freedesktop/DBus'," | |
3678 | "interface='org.freedesktop.DBus'," | |
3679 | "member='NameOwnerChanged'," | |
3680 | "arg0='", name, "'"); | |
bbc29086 | 3681 | |
8df433d7 | 3682 | r = bus_add_match_full( |
3683 | bus, | |
3684 | &u->match_bus_slot, | |
3685 | true, | |
3686 | match, | |
3687 | signal_name_owner_changed, | |
3688 | NULL, | |
3689 | u, | |
3690 | timeout_usec); | |
a5a8776a MJ |
3691 | if (r < 0) |
3692 | return r; | |
3693 | ||
8df433d7 | 3694 | r = sd_bus_message_new_method_call( |
a5b07847 | 3695 | bus, |
8df433d7 | 3696 | &m, |
a5b07847 LP |
3697 | "org.freedesktop.DBus", |
3698 | "/org/freedesktop/DBus", | |
3699 | "org.freedesktop.DBus", | |
8df433d7 | 3700 | "GetNameOwner"); |
3701 | if (r < 0) | |
3702 | return r; | |
3703 | ||
3704 | r = sd_bus_message_append(m, "s", name); | |
3705 | if (r < 0) | |
3706 | return r; | |
3707 | ||
3708 | r = sd_bus_call_async( | |
3709 | bus, | |
3710 | &u->get_name_owner_slot, | |
3711 | m, | |
a5b07847 LP |
3712 | get_name_owner_handler, |
3713 | u, | |
8df433d7 | 3714 | timeout_usec); |
3715 | ||
a5b07847 LP |
3716 | if (r < 0) { |
3717 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3718 | return r; | |
3719 | } | |
3720 | ||
3721 | log_unit_debug(u, "Watching D-Bus name '%s'.", name); | |
3722 | return 0; | |
bbc29086 DM |
3723 | } |
3724 | ||
05e343b7 | 3725 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3726 | int r; |
3727 | ||
05e343b7 LP |
3728 | assert(u); |
3729 | assert(name); | |
3730 | ||
3731 | /* Watch a specific name on the bus. We only support one unit | |
3732 | * watching each name for now. */ | |
3733 | ||
bbc29086 DM |
3734 | if (u->manager->api_bus) { |
3735 | /* If the bus is already available, install the match directly. | |
3736 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3737 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3738 | if (r < 0) |
8ea823b6 | 3739 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3740 | } |
3741 | ||
3742 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3743 | if (r < 0) { | |
3744 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
a5b07847 | 3745 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
bbc29086 DM |
3746 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); |
3747 | } | |
3748 | ||
3749 | return 0; | |
05e343b7 LP |
3750 | } |
3751 | ||
3752 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3753 | assert(u); | |
3754 | assert(name); | |
3755 | ||
8367fea5 | 3756 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3757 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
a5a8776a | 3758 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
05e343b7 LP |
3759 | } |
3760 | ||
d336ba9f | 3761 | int unit_add_node_dependency(Unit *u, const char *what, UnitDependency dep, UnitDependencyMask mask) { |
68eda4bd | 3762 | _cleanup_free_ char *e = NULL; |
44b0d1fd | 3763 | Unit *device; |
6e2ef85b LP |
3764 | int r; |
3765 | ||
3766 | assert(u); | |
3767 | ||
6e2ef85b | 3768 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3769 | if (isempty(what)) |
3770 | return 0; | |
6e2ef85b | 3771 | |
8407a5d0 | 3772 | if (!is_device_path(what)) |
6e2ef85b LP |
3773 | return 0; |
3774 | ||
44b0d1fd | 3775 | /* When device units aren't supported (such as in a container), don't create dependencies on them. */ |
1c2e9646 | 3776 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3777 | return 0; |
3778 | ||
7410616c LP |
3779 | r = unit_name_from_path(what, ".device", &e); |
3780 | if (r < 0) | |
3781 | return r; | |
6e2ef85b | 3782 | |
ac155bb8 | 3783 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3784 | if (r < 0) |
3785 | return r; | |
3786 | ||
ebc8968b FB |
3787 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3788 | dep = UNIT_BINDS_TO; | |
3789 | ||
d336ba9f FB |
3790 | return unit_add_two_dependencies(u, UNIT_AFTER, |
3791 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, | |
3792 | device, true, mask); | |
6e2ef85b | 3793 | } |
a16e1123 | 3794 | |
44b0d1fd LP |
3795 | int unit_add_blockdev_dependency(Unit *u, const char *what, UnitDependencyMask mask) { |
3796 | _cleanup_free_ char *escaped = NULL, *target = NULL; | |
3797 | int r; | |
3798 | ||
3799 | assert(u); | |
3800 | ||
3801 | if (isempty(what)) | |
3802 | return 0; | |
3803 | ||
3804 | if (!path_startswith(what, "/dev/")) | |
3805 | return 0; | |
3806 | ||
3807 | /* If we don't support devices, then also don't bother with blockdev@.target */ | |
3808 | if (!unit_type_supported(UNIT_DEVICE)) | |
3809 | return 0; | |
3810 | ||
3811 | r = unit_name_path_escape(what, &escaped); | |
3812 | if (r < 0) | |
3813 | return r; | |
3814 | ||
3815 | r = unit_name_build("blockdev", escaped, ".target", &target); | |
3816 | if (r < 0) | |
3817 | return r; | |
3818 | ||
3819 | return unit_add_dependency_by_name(u, UNIT_AFTER, target, true, mask); | |
3820 | } | |
3821 | ||
be847e82 | 3822 | int unit_coldplug(Unit *u) { |
95f74928 | 3823 | int r = 0; |
cca098b0 LP |
3824 | |
3825 | assert(u); | |
3826 | ||
f0831ed2 | 3827 | /* Make sure we don't enter a loop, when coldplugging recursively. */ |
f78f265f LP |
3828 | if (u->coldplugged) |
3829 | return 0; | |
3830 | ||
3831 | u->coldplugged = true; | |
3832 | ||
95f74928 MY |
3833 | STRV_FOREACH(i, u->deserialized_refs) |
3834 | RET_GATHER(r, bus_unit_track_add_name(u, *i)); | |
3835 | ||
05a98afd | 3836 | u->deserialized_refs = strv_free(u->deserialized_refs); |
cca098b0 | 3837 | |
95f74928 MY |
3838 | if (UNIT_VTABLE(u)->coldplug) |
3839 | RET_GATHER(r, UNIT_VTABLE(u)->coldplug(u)); | |
5a6158b6 | 3840 | |
95f74928 MY |
3841 | if (u->job) |
3842 | RET_GATHER(r, job_coldplug(u->job)); | |
3843 | if (u->nop_job) | |
3844 | RET_GATHER(r, job_coldplug(u->nop_job)); | |
cca098b0 | 3845 | |
dc7d69b3 TM |
3846 | CGroupContext *c = unit_get_cgroup_context(u); |
3847 | if (c) | |
3848 | cgroup_modify_nft_set(u, /* add = */ true); | |
3849 | ||
05a98afd | 3850 | return r; |
cca098b0 LP |
3851 | } |
3852 | ||
f0831ed2 LP |
3853 | void unit_catchup(Unit *u) { |
3854 | assert(u); | |
3855 | ||
3856 | if (UNIT_VTABLE(u)->catchup) | |
3857 | UNIT_VTABLE(u)->catchup(u); | |
869f52f2 DS |
3858 | |
3859 | unit_cgroup_catchup(u); | |
f0831ed2 LP |
3860 | } |
3861 | ||
ba25d39e | 3862 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3863 | struct stat st; |
3864 | ||
3865 | if (!path) | |
3866 | return false; | |
3867 | ||
77969722 LP |
3868 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3869 | * are never out-of-date. */ | |
3870 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3871 | return false; | |
3872 | ||
21b95806 ZJS |
3873 | if (stat(path, &st) < 0) |
3874 | /* What, cannot access this anymore? */ | |
3875 | return true; | |
3876 | ||
ba25d39e ZJS |
3877 | if (path_masked) |
3878 | /* For masked files check if they are still so */ | |
3879 | return !null_or_empty(&st); | |
3880 | else | |
3a8db9fe | 3881 | /* For non-empty files check the mtime */ |
87ec20ef | 3882 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3883 | |
3884 | return false; | |
3885 | } | |
3886 | ||
45fb0699 | 3887 | bool unit_need_daemon_reload(Unit *u) { |
a82b8b3d | 3888 | _cleanup_strv_free_ char **dropins = NULL; |
1b64d026 | 3889 | |
45fb0699 | 3890 | assert(u); |
a82b8b3d MY |
3891 | assert(u->manager); |
3892 | ||
3893 | if (u->manager->unit_file_state_outdated) | |
3894 | return true; | |
45fb0699 | 3895 | |
ba25d39e ZJS |
3896 | /* For unit files, we allow masking… */ |
3897 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3898 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3899 | return true; |
5f4b19f4 | 3900 | |
ba25d39e ZJS |
3901 | /* Source paths should not be masked… */ |
3902 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3903 | return true; |
ae7a7182 | 3904 | |
19a44dfe | 3905 | if (u->load_state == UNIT_LOADED) |
a82b8b3d MY |
3906 | (void) unit_find_dropin_paths(u, &dropins); |
3907 | if (!strv_equal(u->dropin_paths, dropins)) | |
ab932a62 | 3908 | return true; |
6d10d308 | 3909 | |
ba25d39e | 3910 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3911 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3912 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3913 | return true; |
21b95806 | 3914 | |
ab932a62 | 3915 | return false; |
45fb0699 LP |
3916 | } |
3917 | ||
fdf20a31 | 3918 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3919 | assert(u); |
3920 | ||
fdf20a31 MM |
3921 | if (UNIT_VTABLE(u)->reset_failed) |
3922 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 | 3923 | |
7bf081a1 | 3924 | ratelimit_reset(&u->start_ratelimit); |
6bf0f408 | 3925 | u->start_limit_hit = false; |
5632e374 LP |
3926 | } |
3927 | ||
a7f241db LP |
3928 | Unit *unit_following(Unit *u) { |
3929 | assert(u); | |
3930 | ||
3931 | if (UNIT_VTABLE(u)->following) | |
3932 | return UNIT_VTABLE(u)->following(u); | |
3933 | ||
3934 | return NULL; | |
3935 | } | |
3936 | ||
31afa0a4 | 3937 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3938 | assert(u); |
3939 | ||
31afa0a4 LP |
3940 | /* This call does check the current state of the unit. It's |
3941 | * hence useful to be called from state change calls of the | |
3942 | * unit itself, where the state isn't updated yet. This is | |
3943 | * different from unit_inactive_or_pending() which checks both | |
3944 | * the current state and for a queued job. */ | |
18ffdfda | 3945 | |
28a2dfe8 | 3946 | return unit_has_job_type(u, JOB_STOP); |
31afa0a4 LP |
3947 | } |
3948 | ||
3949 | bool unit_inactive_or_pending(Unit *u) { | |
3950 | assert(u); | |
3951 | ||
3952 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3953 | |
d956ac29 LP |
3954 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3955 | return true; | |
3956 | ||
31afa0a4 | 3957 | if (unit_stop_pending(u)) |
18ffdfda LP |
3958 | return true; |
3959 | ||
3960 | return false; | |
3961 | } | |
3962 | ||
31afa0a4 | 3963 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3964 | assert(u); |
3965 | ||
f60c2665 | 3966 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3967 | |
3968 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3969 | return true; | |
3970 | ||
ac155bb8 | 3971 | if (u->job && |
3742095b | 3972 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
3973 | return true; |
3974 | ||
3975 | return false; | |
3976 | } | |
3977 | ||
52a12341 YW |
3978 | bool unit_will_restart_default(Unit *u) { |
3979 | assert(u); | |
3980 | ||
28a2dfe8 | 3981 | return unit_has_job_type(u, JOB_START); |
52a12341 YW |
3982 | } |
3983 | ||
deb4e708 MK |
3984 | bool unit_will_restart(Unit *u) { |
3985 | assert(u); | |
3986 | ||
3987 | if (!UNIT_VTABLE(u)->will_restart) | |
3988 | return false; | |
3989 | ||
3990 | return UNIT_VTABLE(u)->will_restart(u); | |
3991 | } | |
3992 | ||
38c41427 NK |
3993 | void unit_notify_cgroup_oom(Unit *u, bool managed_oom) { |
3994 | assert(u); | |
3995 | ||
3996 | if (UNIT_VTABLE(u)->notify_cgroup_oom) | |
3997 | UNIT_VTABLE(u)->notify_cgroup_oom(u, managed_oom); | |
3998 | } | |
3999 | ||
82659fd7 | 4000 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
af4fa99d | 4001 | _cleanup_set_free_ Set *pid_set = NULL; |
82659fd7 LP |
4002 | int r; |
4003 | ||
d5099efc | 4004 | pid_set = set_new(NULL); |
82659fd7 LP |
4005 | if (!pid_set) |
4006 | return NULL; | |
4007 | ||
4008 | /* Exclude the main/control pids from being killed via the cgroup */ | |
4009 | if (main_pid > 0) { | |
fea72cc0 | 4010 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 | 4011 | if (r < 0) |
95f14a3e | 4012 | return NULL; |
82659fd7 LP |
4013 | } |
4014 | ||
4015 | if (control_pid > 0) { | |
fea72cc0 | 4016 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 | 4017 | if (r < 0) |
95f14a3e | 4018 | return NULL; |
82659fd7 LP |
4019 | } |
4020 | ||
95f14a3e | 4021 | return TAKE_PTR(pid_set); |
82659fd7 LP |
4022 | } |
4023 | ||
d9911002 LP |
4024 | static int kill_common_log(pid_t pid, int signo, void *userdata) { |
4025 | _cleanup_free_ char *comm = NULL; | |
99534007 | 4026 | Unit *u = ASSERT_PTR(userdata); |
d9911002 LP |
4027 | |
4028 | (void) get_process_comm(pid, &comm); | |
4029 | log_unit_info(u, "Sending signal SIG%s to process " PID_FMT " (%s) on client request.", | |
4030 | signal_to_string(signo), pid, strna(comm)); | |
4031 | ||
4032 | return 1; | |
4033 | } | |
4034 | ||
37eb258e LP |
4035 | static int kill_or_sigqueue(PidRef* pidref, int signo, int code, int value) { |
4036 | assert(pidref_is_set(pidref)); | |
a721cd00 LP |
4037 | assert(SIGNAL_VALID(signo)); |
4038 | ||
4039 | switch (code) { | |
4040 | ||
4041 | case SI_USER: | |
37eb258e LP |
4042 | log_debug("Killing " PID_FMT " with signal SIG%s.", pidref->pid, signal_to_string(signo)); |
4043 | return pidref_kill(pidref, signo); | |
a721cd00 LP |
4044 | |
4045 | case SI_QUEUE: | |
37eb258e LP |
4046 | log_debug("Enqueuing value %i to " PID_FMT " on signal SIG%s.", value, pidref->pid, signal_to_string(signo)); |
4047 | return pidref_sigqueue(pidref, signo, value); | |
a721cd00 LP |
4048 | |
4049 | default: | |
4050 | assert_not_reached(); | |
4051 | } | |
4052 | } | |
4053 | ||
37eb258e | 4054 | int unit_kill( |
d91c34f2 LP |
4055 | Unit *u, |
4056 | KillWho who, | |
4057 | int signo, | |
a721cd00 LP |
4058 | int code, |
4059 | int value, | |
718db961 | 4060 | sd_bus_error *error) { |
d91c34f2 | 4061 | |
37eb258e | 4062 | PidRef *main_pid, *control_pid; |
ac5e3a50 | 4063 | bool killed = false; |
a721cd00 | 4064 | int ret = 0, r; |
814cc562 | 4065 | |
8aff7ac4 LP |
4066 | /* This is the common implementation for explicit user-requested killing of unit processes, shared by |
4067 | * various unit types. Do not confuse with unit_kill_context(), which is what we use when we want to | |
4068 | * stop a service ourselves. */ | |
4069 | ||
a721cd00 LP |
4070 | assert(u); |
4071 | assert(who >= 0); | |
4072 | assert(who < _KILL_WHO_MAX); | |
4073 | assert(SIGNAL_VALID(signo)); | |
4074 | assert(IN_SET(code, SI_USER, SI_QUEUE)); | |
4075 | ||
37eb258e LP |
4076 | main_pid = unit_main_pid(u); |
4077 | control_pid = unit_control_pid(u); | |
4078 | ||
4079 | if (!UNIT_HAS_CGROUP_CONTEXT(u) && !main_pid && !control_pid) | |
4080 | return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Unit type does not support process killing."); | |
4081 | ||
ac5e3a50 | 4082 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
37eb258e | 4083 | if (!main_pid) |
7358dc02 | 4084 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
37eb258e | 4085 | if (!pidref_is_set(main_pid)) |
7358dc02 | 4086 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
4087 | } |
4088 | ||
ac5e3a50 | 4089 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
37eb258e | 4090 | if (!control_pid) |
7358dc02 | 4091 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
37eb258e | 4092 | if (!pidref_is_set(control_pid)) |
7358dc02 | 4093 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
4094 | } |
4095 | ||
37eb258e | 4096 | if (pidref_is_set(control_pid) && |
a721cd00 LP |
4097 | IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) { |
4098 | _cleanup_free_ char *comm = NULL; | |
37eb258e | 4099 | (void) get_process_comm(control_pid->pid, &comm); |
d9911002 | 4100 | |
a721cd00 LP |
4101 | r = kill_or_sigqueue(control_pid, signo, code, value); |
4102 | if (r < 0) { | |
4103 | ret = r; | |
4104 | ||
4105 | /* Report this failure both to the logs and to the client */ | |
4106 | sd_bus_error_set_errnof( | |
4107 | error, r, | |
4108 | "Failed to send signal SIG%s to control process " PID_FMT " (%s): %m", | |
37eb258e | 4109 | signal_to_string(signo), control_pid->pid, strna(comm)); |
a721cd00 LP |
4110 | log_unit_warning_errno( |
4111 | u, r, | |
4112 | "Failed to send signal SIG%s to control process " PID_FMT " (%s) on client request: %m", | |
37eb258e | 4113 | signal_to_string(signo), control_pid->pid, strna(comm)); |
a721cd00 LP |
4114 | } else { |
4115 | log_unit_info(u, "Sent signal SIG%s to control process " PID_FMT " (%s) on client request.", | |
37eb258e | 4116 | signal_to_string(signo), control_pid->pid, strna(comm)); |
a721cd00 | 4117 | killed = true; |
ac5e3a50 | 4118 | } |
a721cd00 | 4119 | } |
814cc562 | 4120 | |
37eb258e | 4121 | if (pidref_is_set(main_pid) && |
a721cd00 | 4122 | IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) { |
d9911002 | 4123 | |
a721cd00 | 4124 | _cleanup_free_ char *comm = NULL; |
37eb258e | 4125 | (void) get_process_comm(main_pid->pid, &comm); |
d9911002 | 4126 | |
a721cd00 LP |
4127 | r = kill_or_sigqueue(main_pid, signo, code, value); |
4128 | if (r < 0) { | |
4129 | if (ret == 0) { | |
4130 | ret = r; | |
4131 | ||
4132 | sd_bus_error_set_errnof( | |
4133 | error, r, | |
4134 | "Failed to send signal SIG%s to main process " PID_FMT " (%s): %m", | |
37eb258e | 4135 | signal_to_string(signo), main_pid->pid, strna(comm)); |
d9911002 | 4136 | } |
a721cd00 LP |
4137 | |
4138 | log_unit_warning_errno( | |
4139 | u, r, | |
4140 | "Failed to send signal SIG%s to main process " PID_FMT " (%s) on client request: %m", | |
37eb258e | 4141 | signal_to_string(signo), main_pid->pid, strna(comm)); |
a721cd00 LP |
4142 | |
4143 | } else { | |
4144 | log_unit_info(u, "Sent signal SIG%s to main process " PID_FMT " (%s) on client request.", | |
37eb258e | 4145 | signal_to_string(signo), main_pid->pid, strna(comm)); |
a721cd00 | 4146 | killed = true; |
ac5e3a50 | 4147 | } |
a721cd00 | 4148 | } |
814cc562 | 4149 | |
a721cd00 LP |
4150 | /* Note: if we shall enqueue rather than kill we won't do this via the cgroup mechanism, since it |
4151 | * doesn't really make much sense (and given that enqueued values are a relatively expensive | |
4152 | * resource, and we shouldn't allow us to be subjects for such allocation sprees) */ | |
4153 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path && code == SI_USER) { | |
814cc562 | 4154 | _cleanup_set_free_ Set *pid_set = NULL; |
814cc562 | 4155 | |
82659fd7 | 4156 | /* Exclude the main/control pids from being killed via the cgroup */ |
37eb258e | 4157 | pid_set = unit_pid_set(main_pid ? main_pid->pid : 0, control_pid ? control_pid->pid : 0); |
814cc562 | 4158 | if (!pid_set) |
d9911002 LP |
4159 | return log_oom(); |
4160 | ||
a721cd00 LP |
4161 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, kill_common_log, u); |
4162 | if (r < 0) { | |
4163 | if (!IN_SET(r, -ESRCH, -ENOENT)) { | |
4164 | if (ret == 0) { | |
4165 | ret = r; | |
4166 | ||
d9911002 | 4167 | sd_bus_error_set_errnof( |
a721cd00 | 4168 | error, r, |
d9911002 LP |
4169 | "Failed to send signal SIG%s to auxiliary processes: %m", |
4170 | signal_to_string(signo)); | |
a721cd00 | 4171 | } |
d9911002 | 4172 | |
a721cd00 LP |
4173 | log_unit_warning_errno( |
4174 | u, r, | |
d9911002 LP |
4175 | "Failed to send signal SIG%s to auxiliary processes on client request: %m", |
4176 | signal_to_string(signo)); | |
4177 | } | |
4178 | } else | |
ac5e3a50 | 4179 | killed = true; |
814cc562 MS |
4180 | } |
4181 | ||
2ae0508e | 4182 | /* If the "fail" versions of the operation are requested, then complain if the set of processes we killed is empty */ |
a721cd00 | 4183 | if (ret == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL, KILL_MAIN_FAIL)) |
2ae0508e | 4184 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No matching processes to kill"); |
ac5e3a50 | 4185 | |
a721cd00 | 4186 | return ret; |
814cc562 MS |
4187 | } |
4188 | ||
6210e7fc LP |
4189 | int unit_following_set(Unit *u, Set **s) { |
4190 | assert(u); | |
4191 | assert(s); | |
4192 | ||
4193 | if (UNIT_VTABLE(u)->following_set) | |
4194 | return UNIT_VTABLE(u)->following_set(u, s); | |
4195 | ||
4196 | *s = NULL; | |
4197 | return 0; | |
4198 | } | |
4199 | ||
a4375746 | 4200 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
4201 | int r; |
4202 | ||
a4375746 LP |
4203 | assert(u); |
4204 | ||
0ec0deaa LP |
4205 | if (u->unit_file_state < 0 && u->fragment_path) { |
4206 | r = unit_file_get_state( | |
4870133b | 4207 | u->manager->runtime_scope, |
0ec0deaa | 4208 | NULL, |
9ea3a0e7 | 4209 | u->id, |
0ec0deaa LP |
4210 | &u->unit_file_state); |
4211 | if (r < 0) | |
4212 | u->unit_file_state = UNIT_FILE_BAD; | |
4213 | } | |
a4375746 | 4214 | |
ac155bb8 | 4215 | return u->unit_file_state; |
a4375746 LP |
4216 | } |
4217 | ||
e77e07f6 | 4218 | PresetAction unit_get_unit_file_preset(Unit *u) { |
a99626c1 LP |
4219 | int r; |
4220 | ||
d2dc52db LP |
4221 | assert(u); |
4222 | ||
a99626c1 LP |
4223 | if (u->unit_file_preset < 0 && u->fragment_path) { |
4224 | _cleanup_free_ char *bn = NULL; | |
4225 | ||
4226 | r = path_extract_filename(u->fragment_path, &bn); | |
4227 | if (r < 0) | |
4228 | return (u->unit_file_preset = r); | |
4229 | ||
4230 | if (r == O_DIRECTORY) | |
4231 | return (u->unit_file_preset = -EISDIR); | |
4232 | ||
d2dc52db | 4233 | u->unit_file_preset = unit_file_query_preset( |
4870133b | 4234 | u->manager->runtime_scope, |
0ec0deaa | 4235 | NULL, |
a99626c1 | 4236 | bn, |
8f7b2566 | 4237 | NULL); |
a99626c1 | 4238 | } |
d2dc52db LP |
4239 | |
4240 | return u->unit_file_preset; | |
4241 | } | |
4242 | ||
7f7d01ed | 4243 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 4244 | assert(ref); |
7f7d01ed ZJS |
4245 | assert(source); |
4246 | assert(target); | |
57020a3a | 4247 | |
7f7d01ed | 4248 | if (ref->target) |
57020a3a LP |
4249 | unit_ref_unset(ref); |
4250 | ||
7f7d01ed ZJS |
4251 | ref->source = source; |
4252 | ref->target = target; | |
4253 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
4254 | return target; | |
57020a3a LP |
4255 | } |
4256 | ||
4257 | void unit_ref_unset(UnitRef *ref) { | |
4258 | assert(ref); | |
4259 | ||
7f7d01ed | 4260 | if (!ref->target) |
57020a3a LP |
4261 | return; |
4262 | ||
b75102e5 LP |
4263 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
4264 | * be unreferenced now. */ | |
7f7d01ed | 4265 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 4266 | |
7f7d01ed ZJS |
4267 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
4268 | ref->source = ref->target = NULL; | |
57020a3a LP |
4269 | } |
4270 | ||
29206d46 LP |
4271 | static int user_from_unit_name(Unit *u, char **ret) { |
4272 | ||
4273 | static const uint8_t hash_key[] = { | |
4274 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
4275 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
4276 | }; | |
4277 | ||
4278 | _cleanup_free_ char *n = NULL; | |
4279 | int r; | |
4280 | ||
4281 | r = unit_name_to_prefix(u->id, &n); | |
4282 | if (r < 0) | |
4283 | return r; | |
4284 | ||
7a8867ab | 4285 | if (valid_user_group_name(n, 0)) { |
ae2a15bc | 4286 | *ret = TAKE_PTR(n); |
29206d46 LP |
4287 | return 0; |
4288 | } | |
4289 | ||
4290 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
4291 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
4292 | return -ENOMEM; | |
4293 | ||
4294 | return 0; | |
4295 | } | |
4296 | ||
598459ce LP |
4297 | int unit_patch_contexts(Unit *u) { |
4298 | CGroupContext *cc; | |
4299 | ExecContext *ec; | |
cba6e062 LP |
4300 | int r; |
4301 | ||
e06c73cc | 4302 | assert(u); |
e06c73cc | 4303 | |
598459ce LP |
4304 | /* Patch in the manager defaults into the exec and cgroup |
4305 | * contexts, _after_ the rest of the settings have been | |
4306 | * initialized */ | |
085afe36 | 4307 | |
598459ce LP |
4308 | ec = unit_get_exec_context(u); |
4309 | if (ec) { | |
4310 | /* This only copies in the ones that need memory */ | |
12375b95 | 4311 | for (unsigned i = 0; i < _RLIMIT_MAX; i++) |
c9e120e0 LP |
4312 | if (u->manager->defaults.rlimit[i] && !ec->rlimit[i]) { |
4313 | ec->rlimit[i] = newdup(struct rlimit, u->manager->defaults.rlimit[i], 1); | |
598459ce LP |
4314 | if (!ec->rlimit[i]) |
4315 | return -ENOMEM; | |
4316 | } | |
4317 | ||
463d0d15 | 4318 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4319 | !ec->working_directory) { |
4320 | ||
4321 | r = get_home_dir(&ec->working_directory); | |
4322 | if (r < 0) | |
4323 | return r; | |
4c08c824 LP |
4324 | |
4325 | /* Allow user services to run, even if the | |
4326 | * home directory is missing */ | |
4327 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4328 | } |
4329 | ||
598459ce | 4330 | if (ec->private_devices) |
2cd0a735 | 4331 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4332 | |
4333 | if (ec->protect_kernel_modules) | |
4334 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 | 4335 | |
84703040 KK |
4336 | if (ec->protect_kernel_logs) |
4337 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYSLOG); | |
4338 | ||
fc64760d KK |
4339 | if (ec->protect_clock) |
4340 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_SYS_TIME) | (UINT64_C(1) << CAP_WAKE_ALARM)); | |
4341 | ||
29206d46 LP |
4342 | if (ec->dynamic_user) { |
4343 | if (!ec->user) { | |
4344 | r = user_from_unit_name(u, &ec->user); | |
4345 | if (r < 0) | |
4346 | return r; | |
4347 | } | |
4348 | ||
4349 | if (!ec->group) { | |
4350 | ec->group = strdup(ec->user); | |
4351 | if (!ec->group) | |
4352 | return -ENOMEM; | |
4353 | } | |
4354 | ||
bf65b7e0 LP |
4355 | /* If the dynamic user option is on, let's make sure that the unit can't leave its |
4356 | * UID/GID around in the file system or on IPC objects. Hence enforce a strict | |
4357 | * sandbox. */ | |
63bb64a0 | 4358 | |
29206d46 | 4359 | ec->private_tmp = true; |
00d9ef85 | 4360 | ec->remove_ipc = true; |
63bb64a0 LP |
4361 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4362 | if (ec->protect_home == PROTECT_HOME_NO) | |
4363 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
bf65b7e0 LP |
4364 | |
4365 | /* Make sure this service can neither benefit from SUID/SGID binaries nor create | |
4366 | * them. */ | |
4367 | ec->no_new_privileges = true; | |
4368 | ec->restrict_suid_sgid = true; | |
29206d46 | 4369 | } |
a2ab603c YW |
4370 | |
4371 | for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) | |
4372 | exec_directory_sort(ec->directories + dt); | |
cba6e062 LP |
4373 | } |
4374 | ||
598459ce | 4375 | cc = unit_get_cgroup_context(u); |
fe65e88b | 4376 | if (cc && ec) { |
f513e420 | 4377 | |
fe65e88b | 4378 | if (ec->private_devices && |
084870f9 ZJS |
4379 | cc->device_policy == CGROUP_DEVICE_POLICY_AUTO) |
4380 | cc->device_policy = CGROUP_DEVICE_POLICY_CLOSED; | |
fe65e88b | 4381 | |
63857bf4 LB |
4382 | /* Only add these if needed, as they imply that everything else is blocked. */ |
4383 | if (cc->device_policy != CGROUP_DEVICE_POLICY_AUTO || cc->device_allow) { | |
4384 | if (ec->root_image || ec->mount_images) { | |
4385 | ||
4386 | /* When RootImage= or MountImages= is specified, the following devices are touched. */ | |
4387 | FOREACH_STRING(p, "/dev/loop-control", "/dev/mapper/control") { | |
4388 | r = cgroup_add_device_allow(cc, p, "rw"); | |
4389 | if (r < 0) | |
4390 | return r; | |
4391 | } | |
4392 | FOREACH_STRING(p, "block-loop", "block-blkext", "block-device-mapper") { | |
4393 | r = cgroup_add_device_allow(cc, p, "rwm"); | |
4394 | if (r < 0) | |
4395 | return r; | |
4396 | } | |
fe65e88b | 4397 | |
63857bf4 LB |
4398 | /* Make sure "block-loop" can be resolved, i.e. make sure "loop" shows up in /proc/devices. |
4399 | * Same for mapper and verity. */ | |
4400 | FOREACH_STRING(p, "modprobe@loop.service", "modprobe@dm_mod.service", "modprobe@dm_verity.service") { | |
4401 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, p, true, UNIT_DEPENDENCY_FILE); | |
4402 | if (r < 0) | |
4403 | return r; | |
4404 | } | |
0cffae95 | 4405 | } |
867af728 | 4406 | |
63857bf4 LB |
4407 | if (ec->protect_clock) { |
4408 | r = cgroup_add_device_allow(cc, "char-rtc", "r"); | |
0cffae95 LB |
4409 | if (r < 0) |
4410 | return r; | |
4411 | } | |
398dc7d3 LB |
4412 | |
4413 | /* If there are encrypted credentials we might need to access the TPM. */ | |
50a4217b | 4414 | if (exec_context_has_encrypted_credentials(ec)) { |
df637af4 | 4415 | r = cgroup_add_device_allow(cc, "char-tpm", "rw"); |
d5902569 AD |
4416 | if (r < 0) |
4417 | return r; | |
4418 | } | |
fe65e88b | 4419 | } |
598459ce | 4420 | } |
f1660f96 | 4421 | |
cba6e062 | 4422 | return 0; |
e06c73cc LP |
4423 | } |
4424 | ||
c2503e35 | 4425 | ExecContext *unit_get_exec_context(const Unit *u) { |
3ef63c31 LP |
4426 | size_t offset; |
4427 | assert(u); | |
4428 | ||
598459ce LP |
4429 | if (u->type < 0) |
4430 | return NULL; | |
4431 | ||
3ef63c31 LP |
4432 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4433 | if (offset <= 0) | |
4434 | return NULL; | |
4435 | ||
4436 | return (ExecContext*) ((uint8_t*) u + offset); | |
4437 | } | |
4438 | ||
718db961 LP |
4439 | KillContext *unit_get_kill_context(Unit *u) { |
4440 | size_t offset; | |
4441 | assert(u); | |
4442 | ||
598459ce LP |
4443 | if (u->type < 0) |
4444 | return NULL; | |
4445 | ||
718db961 LP |
4446 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4447 | if (offset <= 0) | |
4448 | return NULL; | |
4449 | ||
4450 | return (KillContext*) ((uint8_t*) u + offset); | |
4451 | } | |
4452 | ||
4ad49000 LP |
4453 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4454 | size_t offset; | |
4455 | ||
598459ce LP |
4456 | if (u->type < 0) |
4457 | return NULL; | |
4458 | ||
4ad49000 LP |
4459 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4460 | if (offset <= 0) | |
4461 | return NULL; | |
4462 | ||
4463 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4464 | } | |
4465 | ||
28135da3 | 4466 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
613b411c LP |
4467 | size_t offset; |
4468 | ||
598459ce LP |
4469 | if (u->type < 0) |
4470 | return NULL; | |
4471 | ||
613b411c LP |
4472 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4473 | if (offset <= 0) | |
4474 | return NULL; | |
4475 | ||
28135da3 | 4476 | return *(ExecRuntime**) ((uint8_t*) u + offset); |
613b411c LP |
4477 | } |
4478 | ||
2e59b241 | 4479 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4480 | assert(u); |
4481 | ||
2e59b241 | 4482 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4483 | return NULL; |
4484 | ||
39591351 LP |
4485 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4486 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4487 | |
2e59b241 | 4488 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4489 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4490 | |
2e59b241 LP |
4491 | if (flags & UNIT_RUNTIME) |
4492 | return u->manager->lookup_paths.runtime_control; | |
4493 | ||
39591351 | 4494 | return NULL; |
71645aca LP |
4495 | } |
4496 | ||
68ecb48b ZJS |
4497 | const char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4498 | assert(s); | |
8c41640a | 4499 | assert(popcount(flags & (UNIT_ESCAPE_EXEC_SYNTAX_ENV | UNIT_ESCAPE_EXEC_SYNTAX | UNIT_ESCAPE_C)) <= 1); |
68ecb48b | 4500 | assert(buf); |
24536beb ZJS |
4501 | |
4502 | _cleanup_free_ char *t = NULL; | |
2e59b241 | 4503 | |
68ecb48b ZJS |
4504 | /* Returns a string with any escaping done. If no escaping was necessary, *buf is set to NULL, and |
4505 | * the input pointer is returned as-is. If an allocation was needed, the return buffer pointer is | |
4506 | * written to *buf. This means the return value always contains a properly escaped version, but *buf | |
4507 | * only contains a pointer if an allocation was made. Callers can use this to optimize memory | |
4508 | * allocations. */ | |
2e59b241 LP |
4509 | |
4510 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
24536beb ZJS |
4511 | t = specifier_escape(s); |
4512 | if (!t) | |
2e59b241 LP |
4513 | return NULL; |
4514 | ||
24536beb | 4515 | s = t; |
2e59b241 LP |
4516 | } |
4517 | ||
4a055e5a | 4518 | /* We either do C-escaping or shell-escaping, to additionally escape characters that we parse for |
e7416db1 | 4519 | * ExecStart= and friends, i.e. '$' and quotes. */ |
24536beb | 4520 | |
8c41640a | 4521 | if (flags & (UNIT_ESCAPE_EXEC_SYNTAX_ENV | UNIT_ESCAPE_EXEC_SYNTAX)) { |
e7416db1 ZJS |
4522 | char *t2; |
4523 | ||
8c41640a ZJS |
4524 | if (flags & UNIT_ESCAPE_EXEC_SYNTAX_ENV) { |
4525 | t2 = strreplace(s, "$", "$$"); | |
4526 | if (!t2) | |
4527 | return NULL; | |
4528 | free_and_replace(t, t2); | |
4529 | } | |
e7416db1 | 4530 | |
8c41640a | 4531 | t2 = shell_escape(t ?: s, "\""); |
24536beb ZJS |
4532 | if (!t2) |
4533 | return NULL; | |
4534 | free_and_replace(t, t2); | |
4535 | ||
4536 | s = t; | |
2e59b241 | 4537 | |
24536beb | 4538 | } else if (flags & UNIT_ESCAPE_C) { |
e7416db1 ZJS |
4539 | char *t2; |
4540 | ||
4541 | t2 = cescape(s); | |
24536beb | 4542 | if (!t2) |
2e59b241 | 4543 | return NULL; |
24536beb | 4544 | free_and_replace(t, t2); |
2e59b241 | 4545 | |
24536beb | 4546 | s = t; |
2e59b241 LP |
4547 | } |
4548 | ||
68ecb48b ZJS |
4549 | *buf = TAKE_PTR(t); |
4550 | return s; | |
2e59b241 LP |
4551 | } |
4552 | ||
4553 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4554 | _cleanup_free_ char *result = NULL; | |
319a4f4b | 4555 | size_t n = 0; |
2e59b241 | 4556 | |
24536beb ZJS |
4557 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command |
4558 | * lines in a way suitable for ExecStart= stanzas. */ | |
2e59b241 LP |
4559 | |
4560 | STRV_FOREACH(i, l) { | |
4561 | _cleanup_free_ char *buf = NULL; | |
4562 | const char *p; | |
4563 | size_t a; | |
4564 | char *q; | |
4565 | ||
4566 | p = unit_escape_setting(*i, flags, &buf); | |
4567 | if (!p) | |
4568 | return NULL; | |
4569 | ||
4570 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
319a4f4b | 4571 | if (!GREEDY_REALLOC(result, n + a + 1)) |
2e59b241 LP |
4572 | return NULL; |
4573 | ||
4574 | q = result + n; | |
4575 | if (n > 0) | |
4576 | *(q++) = ' '; | |
4577 | ||
4578 | *(q++) = '"'; | |
4579 | q = stpcpy(q, p); | |
4580 | *(q++) = '"'; | |
4581 | ||
4582 | n += a; | |
4583 | } | |
4584 | ||
319a4f4b | 4585 | if (!GREEDY_REALLOC(result, n + 1)) |
2e59b241 LP |
4586 | return NULL; |
4587 | ||
4588 | result[n] = 0; | |
4589 | ||
ae2a15bc | 4590 | return TAKE_PTR(result); |
2e59b241 LP |
4591 | } |
4592 | ||
4593 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4594 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4595 | const char *dir, *wrapped; |
26d04f86 | 4596 | int r; |
71645aca LP |
4597 | |
4598 | assert(u); | |
2e59b241 LP |
4599 | assert(name); |
4600 | assert(data); | |
4601 | ||
4602 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4603 | return 0; | |
4604 | ||
4605 | data = unit_escape_setting(data, flags, &escaped); | |
4606 | if (!data) | |
4607 | return -ENOMEM; | |
4608 | ||
4609 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4610 | * previous section header is the same */ | |
4611 | ||
4612 | if (flags & UNIT_PRIVATE) { | |
4613 | if (!UNIT_VTABLE(u)->private_section) | |
4614 | return -EINVAL; | |
4615 | ||
4616 | if (!u->transient_file || u->last_section_private < 0) | |
4617 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4618 | else if (u->last_section_private == 0) | |
4619 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4620 | } else { | |
4621 | if (!u->transient_file || u->last_section_private < 0) | |
4622 | data = strjoina("[Unit]\n", data); | |
4623 | else if (u->last_section_private > 0) | |
4624 | data = strjoina("\n[Unit]\n", data); | |
4625 | } | |
71645aca | 4626 | |
4f4afc88 LP |
4627 | if (u->transient_file) { |
4628 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4629 | * write to the transient unit file. */ | |
4630 | fputs(data, u->transient_file); | |
4f4afc88 | 4631 | |
2e59b241 LP |
4632 | if (!endswith(data, "\n")) |
4633 | fputc('\n', u->transient_file); | |
4634 | ||
4635 | /* Remember which section we wrote this entry to */ | |
4636 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4637 | return 0; |
2e59b241 | 4638 | } |
8e2af478 | 4639 | |
2e59b241 | 4640 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4641 | if (!dir) |
4642 | return -EINVAL; | |
71645aca | 4643 | |
2a9a6f8a | 4644 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4645 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4646 | data, |
4647 | "\n"); | |
e20b2a86 | 4648 | |
815b09d3 | 4649 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4650 | if (r < 0) |
4651 | return r; | |
4652 | ||
45639f1b | 4653 | (void) mkdir_p_label(p, 0755); |
4dba44a5 ZJS |
4654 | |
4655 | /* Make sure the drop-in dir is registered in our path cache. This way we don't need to stupidly | |
4656 | * recreate the cache after every drop-in we write. */ | |
4657 | if (u->manager->unit_path_cache) { | |
be327321 | 4658 | r = set_put_strdup(&u->manager->unit_path_cache, p); |
4dba44a5 ZJS |
4659 | if (r < 0) |
4660 | return r; | |
4661 | } | |
4662 | ||
2a9a6f8a | 4663 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4664 | if (r < 0) |
4665 | return r; | |
4666 | ||
815b09d3 | 4667 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4668 | if (r < 0) |
4669 | return r; | |
815b09d3 | 4670 | q = NULL; |
adb76a70 | 4671 | |
adb76a70 WC |
4672 | strv_uniq(u->dropin_paths); |
4673 | ||
4674 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4675 | ||
4676 | return 0; | |
26d04f86 | 4677 | } |
71645aca | 4678 | |
2e59b241 | 4679 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4680 | _cleanup_free_ char *p = NULL; |
4681 | va_list ap; | |
4682 | int r; | |
4683 | ||
4684 | assert(u); | |
4685 | assert(name); | |
4686 | assert(format); | |
4687 | ||
2e59b241 | 4688 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4689 | return 0; |
4690 | ||
4691 | va_start(ap, format); | |
4692 | r = vasprintf(&p, format, ap); | |
4693 | va_end(ap); | |
4694 | ||
4695 | if (r < 0) | |
4696 | return -ENOMEM; | |
4697 | ||
2e59b241 | 4698 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4699 | } |
71645aca | 4700 | |
c2756a68 | 4701 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4702 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4703 | FILE *f; |
4f4afc88 | 4704 | |
c2756a68 LP |
4705 | assert(u); |
4706 | ||
3f5e8115 LP |
4707 | if (!UNIT_VTABLE(u)->can_transient) |
4708 | return -EOPNOTSUPP; | |
4709 | ||
45639f1b LP |
4710 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4711 | ||
657ee2d8 | 4712 | path = path_join(u->manager->lookup_paths.transient, u->id); |
4f4afc88 LP |
4713 | if (!path) |
4714 | return -ENOMEM; | |
4715 | ||
4716 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4717 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4718 | ||
2053593f | 4719 | WITH_UMASK(0022) { |
4f4afc88 | 4720 | f = fopen(path, "we"); |
0126c8f3 | 4721 | if (!f) |
78e334b5 | 4722 | return -errno; |
4f4afc88 LP |
4723 | } |
4724 | ||
0126c8f3 | 4725 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4726 | u->transient_file = f; |
4727 | ||
0126c8f3 | 4728 | free_and_replace(u->fragment_path, path); |
7c65093a | 4729 | |
7c65093a LP |
4730 | u->source_path = mfree(u->source_path); |
4731 | u->dropin_paths = strv_free(u->dropin_paths); | |
4732 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4733 | ||
4f4afc88 LP |
4734 | u->load_state = UNIT_STUB; |
4735 | u->load_error = 0; | |
4736 | u->transient = true; | |
4737 | ||
7c65093a LP |
4738 | unit_add_to_dbus_queue(u); |
4739 | unit_add_to_gc_queue(u); | |
c2756a68 | 4740 | |
4f4afc88 LP |
4741 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4742 | u->transient_file); | |
4743 | ||
3f5e8115 | 4744 | return 0; |
c2756a68 LP |
4745 | } |
4746 | ||
c53d2d54 | 4747 | static int log_kill(pid_t pid, int sig, void *userdata) { |
1d98fef1 LP |
4748 | _cleanup_free_ char *comm = NULL; |
4749 | ||
4750 | (void) get_process_comm(pid, &comm); | |
4751 | ||
4752 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4753 | only, like for example systemd's own PAM stub process. */ | |
4754 | if (comm && comm[0] == '(') | |
500cd2e8 | 4755 | /* Although we didn't log anything, as this callback is used in unit_kill_context we must return 1 |
4756 | * here to let the manager know that a process was killed. */ | |
4757 | return 1; | |
1d98fef1 LP |
4758 | |
4759 | log_unit_notice(userdata, | |
4760 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4761 | pid, | |
4762 | strna(comm), | |
4763 | signal_to_string(sig)); | |
c53d2d54 DB |
4764 | |
4765 | return 1; | |
1d98fef1 LP |
4766 | } |
4767 | ||
efa75d70 LP |
4768 | static int operation_to_signal( |
4769 | const KillContext *c, | |
4770 | KillOperation k, | |
4771 | bool *ret_noteworthy) { | |
4772 | ||
1d98fef1 LP |
4773 | assert(c); |
4774 | ||
4775 | switch (k) { | |
4776 | ||
4777 | case KILL_TERMINATE: | |
4778 | case KILL_TERMINATE_AND_LOG: | |
efa75d70 | 4779 | *ret_noteworthy = false; |
1d98fef1 LP |
4780 | return c->kill_signal; |
4781 | ||
a232ebcc | 4782 | case KILL_RESTART: |
efa75d70 | 4783 | *ret_noteworthy = false; |
a232ebcc ZJS |
4784 | return restart_kill_signal(c); |
4785 | ||
1d98fef1 | 4786 | case KILL_KILL: |
efa75d70 | 4787 | *ret_noteworthy = true; |
fbb48d4c | 4788 | return c->final_kill_signal; |
1d98fef1 | 4789 | |
c87700a1 | 4790 | case KILL_WATCHDOG: |
efa75d70 | 4791 | *ret_noteworthy = true; |
c87700a1 | 4792 | return c->watchdog_signal; |
1d98fef1 LP |
4793 | |
4794 | default: | |
04499a70 | 4795 | assert_not_reached(); |
1d98fef1 LP |
4796 | } |
4797 | } | |
4798 | ||
cd2086fe LP |
4799 | int unit_kill_context( |
4800 | Unit *u, | |
4801 | KillContext *c, | |
db2cb23b | 4802 | KillOperation k, |
7901288a LP |
4803 | PidRef* main_pid, |
4804 | PidRef* control_pid, | |
cd2086fe LP |
4805 | bool main_pid_alien) { |
4806 | ||
1d98fef1 | 4807 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4808 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4809 | int sig, r; |
cd2086fe LP |
4810 | |
4811 | assert(u); | |
4812 | assert(c); | |
4813 | ||
8aff7ac4 LP |
4814 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. Returns > 0 |
4815 | * if we killed something worth waiting for, 0 otherwise. Do not confuse with unit_kill_common() | |
4816 | * which is used for user-requested killing of unit processes. */ | |
1d98fef1 | 4817 | |
cd2086fe LP |
4818 | if (c->kill_mode == KILL_NONE) |
4819 | return 0; | |
4820 | ||
4ab1670f ZJS |
4821 | bool noteworthy; |
4822 | sig = operation_to_signal(c, k, ¬eworthy); | |
4823 | if (noteworthy) | |
4824 | log_func = log_kill; | |
1d98fef1 LP |
4825 | |
4826 | send_sighup = | |
4827 | c->send_sighup && | |
4828 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4829 | sig != SIGHUP; | |
4830 | ||
7901288a | 4831 | if (pidref_is_set(main_pid)) { |
1d98fef1 | 4832 | if (log_func) |
7901288a | 4833 | log_func(main_pid->pid, sig, u); |
cd2086fe | 4834 | |
7901288a | 4835 | r = pidref_kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4836 | if (r < 0 && r != -ESRCH) { |
4837 | _cleanup_free_ char *comm = NULL; | |
7901288a | 4838 | (void) get_process_comm(main_pid->pid, &comm); |
cd2086fe | 4839 | |
7901288a | 4840 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid->pid, strna(comm)); |
82659fd7 | 4841 | } else { |
bc6aed7b LP |
4842 | if (!main_pid_alien) |
4843 | wait_for_exit = true; | |
82659fd7 | 4844 | |
1d98fef1 | 4845 | if (r != -ESRCH && send_sighup) |
7901288a | 4846 | (void) pidref_kill(main_pid, SIGHUP); |
82659fd7 | 4847 | } |
cd2086fe LP |
4848 | } |
4849 | ||
7901288a | 4850 | if (pidref_is_set(control_pid)) { |
1d98fef1 | 4851 | if (log_func) |
7901288a | 4852 | log_func(control_pid->pid, sig, u); |
cd2086fe | 4853 | |
7901288a | 4854 | r = pidref_kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4855 | if (r < 0 && r != -ESRCH) { |
4856 | _cleanup_free_ char *comm = NULL; | |
7901288a | 4857 | (void) get_process_comm(control_pid->pid, &comm); |
cd2086fe | 4858 | |
7901288a | 4859 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid->pid, strna(comm)); |
82659fd7 | 4860 | } else { |
cd2086fe | 4861 | wait_for_exit = true; |
82659fd7 | 4862 | |
1d98fef1 | 4863 | if (r != -ESRCH && send_sighup) |
7901288a | 4864 | (void) pidref_kill(control_pid, SIGHUP); |
82659fd7 | 4865 | } |
cd2086fe LP |
4866 | } |
4867 | ||
b821a397 LP |
4868 | if (u->cgroup_path && |
4869 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4870 | _cleanup_set_free_ Set *pid_set = NULL; |
4871 | ||
82659fd7 | 4872 | /* Exclude the main/control pids from being killed via the cgroup */ |
7901288a | 4873 | pid_set = unit_pid_set(main_pid ? main_pid->pid : 0, control_pid ? control_pid->pid : 0); |
cd2086fe LP |
4874 | if (!pid_set) |
4875 | return -ENOMEM; | |
4876 | ||
1d98fef1 LP |
4877 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4878 | sig, | |
4879 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4880 | pid_set, | |
4881 | log_func, u); | |
cd2086fe | 4882 | if (r < 0) { |
4c701096 | 4883 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
6178e2f8 | 4884 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", empty_to_root(u->cgroup_path)); |
b821a397 | 4885 | |
82659fd7 | 4886 | } else if (r > 0) { |
bc6aed7b | 4887 | |
1d9cc876 LP |
4888 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4889 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
4890 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
4891 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
4892 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
4893 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 4894 | |
c22800e4 | 4895 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 4896 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 4897 | wait_for_exit = true; |
58ea275a | 4898 | |
1d98fef1 | 4899 | if (send_sighup) { |
82659fd7 LP |
4900 | set_free(pid_set); |
4901 | ||
7901288a | 4902 | pid_set = unit_pid_set(main_pid ? main_pid->pid : 0, control_pid ? control_pid->pid : 0); |
82659fd7 LP |
4903 | if (!pid_set) |
4904 | return -ENOMEM; | |
4905 | ||
c8aa4b5b LP |
4906 | (void) cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4907 | SIGHUP, | |
4908 | CGROUP_IGNORE_SELF, | |
4909 | pid_set, | |
4910 | NULL, NULL); | |
82659fd7 LP |
4911 | } |
4912 | } | |
cd2086fe LP |
4913 | } |
4914 | ||
4915 | return wait_for_exit; | |
4916 | } | |
4917 | ||
eef85c4a | 4918 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
a57f7e2c LP |
4919 | int r; |
4920 | ||
4921 | assert(u); | |
4922 | assert(path); | |
4923 | ||
ac19bdd0 ZJS |
4924 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these |
4925 | * paths in the unit (from the path to the UnitDependencyInfo structure indicating how to the | |
4926 | * dependency came to be). However, we build a prefix table for all possible prefixes so that new | |
4927 | * appearing mount units can easily determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4928 | |
70b64bd3 ZJS |
4929 | if (!path_is_absolute(path)) |
4930 | return -EINVAL; | |
4931 | ||
ac19bdd0 ZJS |
4932 | if (hashmap_contains(u->requires_mounts_for, path)) /* Exit quickly if the path is already covered. */ |
4933 | return 0; | |
eef85c4a | 4934 | |
ac19bdd0 | 4935 | _cleanup_free_ char *p = strdup(path); |
a57f7e2c LP |
4936 | if (!p) |
4937 | return -ENOMEM; | |
4938 | ||
ac19bdd0 ZJS |
4939 | /* Use the canonical form of the path as the stored key. We call path_is_normalized() |
4940 | * only after simplification, since path_is_normalized() rejects paths with '.'. | |
4941 | * path_is_normalized() also verifies that the path fits in PATH_MAX. */ | |
4ff361cc | 4942 | path = path_simplify(p); |
a57f7e2c | 4943 | |
ca8700e9 | 4944 | if (!path_is_normalized(path)) |
a57f7e2c | 4945 | return -EPERM; |
a57f7e2c | 4946 | |
ac19bdd0 | 4947 | UnitDependencyInfo di = { |
eef85c4a LP |
4948 | .origin_mask = mask |
4949 | }; | |
4950 | ||
ac19bdd0 | 4951 | r = hashmap_ensure_put(&u->requires_mounts_for, &path_hash_ops, p, di.data); |
ca8700e9 | 4952 | if (r < 0) |
a57f7e2c | 4953 | return r; |
ac19bdd0 ZJS |
4954 | assert(r > 0); |
4955 | TAKE_PTR(p); /* path remains a valid pointer to the string stored in the hashmap */ | |
a57f7e2c | 4956 | |
4cb06c59 | 4957 | char prefix[strlen(path) + 1]; |
ca8700e9 | 4958 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
a57f7e2c LP |
4959 | Set *x; |
4960 | ||
4961 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4962 | if (!x) { | |
ca8700e9 | 4963 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 4964 | |
548f6937 | 4965 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
742f41ad LP |
4966 | if (r < 0) |
4967 | return r; | |
a57f7e2c LP |
4968 | |
4969 | q = strdup(prefix); | |
4970 | if (!q) | |
4971 | return -ENOMEM; | |
4972 | ||
d5099efc | 4973 | x = set_new(NULL); |
ca8700e9 | 4974 | if (!x) |
a57f7e2c | 4975 | return -ENOMEM; |
a57f7e2c LP |
4976 | |
4977 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4978 | if (r < 0) { | |
a57f7e2c LP |
4979 | set_free(x); |
4980 | return r; | |
4981 | } | |
ca8700e9 | 4982 | q = NULL; |
a57f7e2c LP |
4983 | } |
4984 | ||
4985 | r = set_put(x, u); | |
4986 | if (r < 0) | |
4987 | return r; | |
4988 | } | |
4989 | ||
4990 | return 0; | |
4991 | } | |
4992 | ||
613b411c | 4993 | int unit_setup_exec_runtime(Unit *u) { |
28135da3 | 4994 | _cleanup_(exec_shared_runtime_unrefp) ExecSharedRuntime *esr = NULL; |
15220772 | 4995 | _cleanup_(dynamic_creds_unrefp) DynamicCreds *dcreds = NULL; |
83123a44 | 4996 | _cleanup_set_free_ Set *units = NULL; |
28135da3 | 4997 | ExecRuntime **rt; |
15220772 | 4998 | ExecContext *ec; |
613b411c | 4999 | size_t offset; |
613b411c | 5000 | Unit *other; |
e8a565cb | 5001 | int r; |
613b411c LP |
5002 | |
5003 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
5004 | assert(offset > 0); | |
5005 | ||
28135da3 DDM |
5006 | /* Check if there already is an ExecRuntime for this unit? */ |
5007 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
613b411c LP |
5008 | if (*rt) |
5009 | return 0; | |
5010 | ||
15220772 DDM |
5011 | ec = unit_get_exec_context(u); |
5012 | assert(ec); | |
5013 | ||
83123a44 YW |
5014 | r = unit_get_transitive_dependency_set(u, UNIT_ATOM_JOINS_NAMESPACE_OF, &units); |
5015 | if (r < 0) | |
5016 | return r; | |
5017 | ||
613b411c | 5018 | /* Try to get it from somebody else */ |
83123a44 | 5019 | SET_FOREACH(other, units) { |
28135da3 DDM |
5020 | r = exec_shared_runtime_acquire(u->manager, NULL, other->id, false, &esr); |
5021 | if (r < 0) | |
5022 | return r; | |
5023 | if (r > 0) | |
5024 | break; | |
5025 | } | |
5026 | ||
5027 | if (!esr) { | |
15220772 | 5028 | r = exec_shared_runtime_acquire(u->manager, ec, u->id, true, &esr); |
28135da3 DDM |
5029 | if (r < 0) |
5030 | return r; | |
613b411c LP |
5031 | } |
5032 | ||
15220772 DDM |
5033 | if (ec->dynamic_user) { |
5034 | r = dynamic_creds_make(u->manager, ec->user, ec->group, &dcreds); | |
5035 | if (r < 0) | |
5036 | return r; | |
5037 | } | |
5038 | ||
9c0c6701 | 5039 | r = exec_runtime_make(u, ec, esr, dcreds, rt); |
28135da3 DDM |
5040 | if (r < 0) |
5041 | return r; | |
5042 | ||
5043 | TAKE_PTR(esr); | |
15220772 | 5044 | TAKE_PTR(dcreds); |
28135da3 DDM |
5045 | |
5046 | return r; | |
613b411c LP |
5047 | } |
5048 | ||
1c2e9646 | 5049 | bool unit_type_supported(UnitType t) { |
88e4bfa6 MS |
5050 | static int8_t cache[_UNIT_TYPE_MAX] = {}; /* -1: disabled, 1: enabled: 0: don't know */ |
5051 | int r; | |
5052 | ||
1c2e9646 LP |
5053 | if (_unlikely_(t < 0)) |
5054 | return false; | |
5055 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
5056 | return false; | |
5057 | ||
88e4bfa6 MS |
5058 | if (cache[t] == 0) { |
5059 | char *e; | |
5060 | ||
5061 | e = strjoina("SYSTEMD_SUPPORT_", unit_type_to_string(t)); | |
5062 | ||
5063 | r = getenv_bool(ascii_strupper(e)); | |
5064 | if (r < 0 && r != -ENXIO) | |
5065 | log_debug_errno(r, "Failed to parse $%s, ignoring: %m", e); | |
5066 | ||
5067 | cache[t] = r == 0 ? -1 : 1; | |
5068 | } | |
5069 | if (cache[t] < 0) | |
5070 | return false; | |
5071 | ||
1c2e9646 LP |
5072 | if (!unit_vtable[t]->supported) |
5073 | return true; | |
5074 | ||
5075 | return unit_vtable[t]->supported(); | |
5076 | } | |
5077 | ||
8b4305c7 LP |
5078 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
5079 | int r; | |
5080 | ||
5081 | assert(u); | |
5082 | assert(where); | |
5083 | ||
c2503e35 RH |
5084 | if (!unit_log_level_test(u, LOG_NOTICE)) |
5085 | return; | |
5086 | ||
db55bbf2 | 5087 | r = dir_is_empty(where, /* ignore_hidden_or_backup= */ false); |
3f602115 | 5088 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
5089 | return; |
5090 | if (r < 0) { | |
5091 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
5092 | return; | |
5093 | } | |
5094 | ||
c2503e35 RH |
5095 | log_unit_struct(u, LOG_NOTICE, |
5096 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
5097 | LOG_UNIT_INVOCATION_ID(u), | |
5098 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
5099 | "WHERE=%s", where); | |
8b4305c7 LP |
5100 | } |
5101 | ||
25cd4964 | 5102 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
58d9d89b | 5103 | _cleanup_free_ char *canonical_where = NULL; |
8b4305c7 LP |
5104 | int r; |
5105 | ||
5106 | assert(u); | |
5107 | assert(where); | |
5108 | ||
f461a28d | 5109 | r = chase(where, NULL, CHASE_NONEXISTENT, &canonical_where, NULL); |
8b4305c7 | 5110 | if (r < 0) { |
25cd4964 | 5111 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
5112 | return 0; |
5113 | } | |
25cd4964 AJ |
5114 | |
5115 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
5116 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
5117 | return 0; |
5118 | ||
25cd4964 | 5119 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
c2503e35 RH |
5120 | log_unit_struct(u, LOG_ERR, |
5121 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
5122 | LOG_UNIT_INVOCATION_ID(u), | |
5123 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), | |
5124 | "WHERE=%s", where); | |
8b4305c7 LP |
5125 | |
5126 | return -ELOOP; | |
5127 | } | |
0f13f3bd LP |
5128 | |
5129 | bool unit_is_pristine(Unit *u) { | |
5130 | assert(u); | |
5131 | ||
1f832446 ZJS |
5132 | /* Check if the unit already exists or is already around, in a number of different ways. Note that to |
5133 | * cater for unit types such as slice, we are generally fine with units that are marked UNIT_LOADED | |
5134 | * even though nothing was actually loaded, as those unit types don't require a file on disk. | |
5135 | * | |
5136 | * Note that we don't check for drop-ins here, because we allow drop-ins for transient units | |
5137 | * identically to non-transient units, both unit-specific and hierarchical. E.g. for a-b-c.service: | |
5138 | * service.d/….conf, a-.service.d/….conf, a-b-.service.d/….conf, a-b-c.service.d/….conf. | |
5139 | */ | |
0f13f3bd | 5140 | |
b146a734 ZJS |
5141 | return IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) && |
5142 | !u->fragment_path && | |
5143 | !u->source_path && | |
b146a734 ZJS |
5144 | !u->job && |
5145 | !u->merged_into; | |
0f13f3bd | 5146 | } |
291d565a | 5147 | |
37eb258e | 5148 | PidRef* unit_control_pid(Unit *u) { |
291d565a LP |
5149 | assert(u); |
5150 | ||
5151 | if (UNIT_VTABLE(u)->control_pid) | |
5152 | return UNIT_VTABLE(u)->control_pid(u); | |
5153 | ||
37eb258e | 5154 | return NULL; |
291d565a LP |
5155 | } |
5156 | ||
37eb258e | 5157 | PidRef* unit_main_pid(Unit *u) { |
291d565a LP |
5158 | assert(u); |
5159 | ||
5160 | if (UNIT_VTABLE(u)->main_pid) | |
5161 | return UNIT_VTABLE(u)->main_pid(u); | |
5162 | ||
37eb258e | 5163 | return NULL; |
291d565a | 5164 | } |
00d9ef85 | 5165 | |
3bb48b19 TM |
5166 | static void unit_modify_user_nft_set(Unit *u, bool add, NFTSetSource source, uint32_t element) { |
5167 | int r; | |
5168 | ||
5169 | assert(u); | |
5170 | ||
5171 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5172 | return; | |
5173 | ||
5174 | CGroupContext *c; | |
5175 | c = unit_get_cgroup_context(u); | |
5176 | if (!c) | |
5177 | return; | |
5178 | ||
5179 | if (!u->manager->fw_ctx) { | |
5180 | r = fw_ctx_new_full(&u->manager->fw_ctx, /* init_tables= */ false); | |
5181 | if (r < 0) | |
5182 | return; | |
5183 | ||
5184 | assert(u->manager->fw_ctx); | |
5185 | } | |
5186 | ||
5187 | FOREACH_ARRAY(nft_set, c->nft_set_context.sets, c->nft_set_context.n_sets) { | |
5188 | if (nft_set->source != source) | |
5189 | continue; | |
5190 | ||
5191 | r = nft_set_element_modify_any(u->manager->fw_ctx, add, nft_set->nfproto, nft_set->table, nft_set->set, &element, sizeof(element)); | |
5192 | if (r < 0) | |
5193 | log_warning_errno(r, "Failed to %s NFT set: family %s, table %s, set %s, ID %u, ignoring: %m", | |
5194 | add? "add" : "delete", nfproto_to_string(nft_set->nfproto), nft_set->table, nft_set->set, element); | |
5195 | else | |
5196 | log_debug("%s NFT set: family %s, table %s, set %s, ID %u", | |
5197 | add? "Added" : "Deleted", nfproto_to_string(nft_set->nfproto), nft_set->table, nft_set->set, element); | |
5198 | } | |
5199 | } | |
5200 | ||
00d9ef85 LP |
5201 | static void unit_unref_uid_internal( |
5202 | Unit *u, | |
5203 | uid_t *ref_uid, | |
5204 | bool destroy_now, | |
5205 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
5206 | ||
5207 | assert(u); | |
5208 | assert(ref_uid); | |
5209 | assert(_manager_unref_uid); | |
5210 | ||
5211 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
5212 | * gid_t are actually the same time, with the same validity rules. | |
5213 | * | |
5214 | * Drops a reference to UID/GID from a unit. */ | |
5215 | ||
5216 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
5217 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
5218 | ||
5219 | if (!uid_is_valid(*ref_uid)) | |
5220 | return; | |
5221 | ||
5222 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
5223 | *ref_uid = UID_INVALID; | |
5224 | } | |
5225 | ||
b90cf102 | 5226 | static void unit_unref_uid(Unit *u, bool destroy_now) { |
3bb48b19 TM |
5227 | assert(u); |
5228 | ||
5229 | unit_modify_user_nft_set(u, /* add = */ false, NFT_SET_SOURCE_USER, u->ref_uid); | |
5230 | ||
00d9ef85 LP |
5231 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); |
5232 | } | |
5233 | ||
b90cf102 | 5234 | static void unit_unref_gid(Unit *u, bool destroy_now) { |
3bb48b19 TM |
5235 | assert(u); |
5236 | ||
5237 | unit_modify_user_nft_set(u, /* add = */ false, NFT_SET_SOURCE_GROUP, u->ref_gid); | |
5238 | ||
00d9ef85 LP |
5239 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); |
5240 | } | |
5241 | ||
b90cf102 LP |
5242 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { |
5243 | assert(u); | |
5244 | ||
5245 | unit_unref_uid(u, destroy_now); | |
5246 | unit_unref_gid(u, destroy_now); | |
5247 | } | |
5248 | ||
00d9ef85 LP |
5249 | static int unit_ref_uid_internal( |
5250 | Unit *u, | |
5251 | uid_t *ref_uid, | |
5252 | uid_t uid, | |
5253 | bool clean_ipc, | |
5254 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
5255 | ||
5256 | int r; | |
5257 | ||
5258 | assert(u); | |
5259 | assert(ref_uid); | |
5260 | assert(uid_is_valid(uid)); | |
5261 | assert(_manager_ref_uid); | |
5262 | ||
5263 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
5264 | * are actually the same type, and have the same validity rules. | |
5265 | * | |
5266 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
5267 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
5268 | * drops to zero. */ | |
5269 | ||
5270 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
5271 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
5272 | ||
5273 | if (*ref_uid == uid) | |
5274 | return 0; | |
5275 | ||
5276 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
5277 | return -EBUSY; | |
5278 | ||
5279 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
5280 | if (r < 0) | |
5281 | return r; | |
5282 | ||
5283 | *ref_uid = uid; | |
5284 | return 1; | |
5285 | } | |
5286 | ||
b90cf102 | 5287 | static int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { |
00d9ef85 LP |
5288 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); |
5289 | } | |
5290 | ||
b90cf102 | 5291 | static int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { |
00d9ef85 LP |
5292 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); |
5293 | } | |
5294 | ||
5295 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
5296 | int r = 0, q = 0; | |
5297 | ||
5298 | assert(u); | |
5299 | ||
5300 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
5301 | ||
5302 | if (uid_is_valid(uid)) { | |
5303 | r = unit_ref_uid(u, uid, clean_ipc); | |
5304 | if (r < 0) | |
5305 | return r; | |
5306 | } | |
5307 | ||
5308 | if (gid_is_valid(gid)) { | |
5309 | q = unit_ref_gid(u, gid, clean_ipc); | |
5310 | if (q < 0) { | |
5311 | if (r > 0) | |
5312 | unit_unref_uid(u, false); | |
5313 | ||
5314 | return q; | |
5315 | } | |
5316 | } | |
5317 | ||
5318 | return r > 0 || q > 0; | |
5319 | } | |
5320 | ||
5321 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
5322 | ExecContext *c; | |
5323 | int r; | |
5324 | ||
5325 | assert(u); | |
5326 | ||
5327 | c = unit_get_exec_context(u); | |
5328 | ||
5329 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
5330 | if (r < 0) | |
5331 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
5332 | ||
3bb48b19 TM |
5333 | unit_modify_user_nft_set(u, /* add = */ true, NFT_SET_SOURCE_USER, uid); |
5334 | unit_modify_user_nft_set(u, /* add = */ true, NFT_SET_SOURCE_GROUP, gid); | |
5335 | ||
00d9ef85 LP |
5336 | return r; |
5337 | } | |
5338 | ||
00d9ef85 LP |
5339 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { |
5340 | int r; | |
5341 | ||
5342 | assert(u); | |
5343 | ||
5344 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
5345 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
5346 | * objects when no service references the UID/GID anymore. */ | |
5347 | ||
5348 | r = unit_ref_uid_gid(u, uid, gid); | |
5349 | if (r > 0) | |
37d0b962 | 5350 | unit_add_to_dbus_queue(u); |
00d9ef85 | 5351 | } |
4b58153d | 5352 | |
4b58153d LP |
5353 | int unit_acquire_invocation_id(Unit *u) { |
5354 | sd_id128_t id; | |
5355 | int r; | |
5356 | ||
5357 | assert(u); | |
5358 | ||
5359 | r = sd_id128_randomize(&id); | |
5360 | if (r < 0) | |
5361 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
5362 | ||
5363 | r = unit_set_invocation_id(u, id); | |
5364 | if (r < 0) | |
5365 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
5366 | ||
af92c603 | 5367 | unit_add_to_dbus_queue(u); |
4b58153d LP |
5368 | return 0; |
5369 | } | |
f0d47797 | 5370 | |
1ad6e8b3 LP |
5371 | int unit_set_exec_params(Unit *u, ExecParameters *p) { |
5372 | int r; | |
5373 | ||
7960b0c7 LP |
5374 | assert(u); |
5375 | assert(p); | |
f0d47797 | 5376 | |
004c7f16 | 5377 | /* Copy parameters from manager */ |
1ad6e8b3 LP |
5378 | r = manager_get_effective_environment(u->manager, &p->environment); |
5379 | if (r < 0) | |
5380 | return r; | |
5381 | ||
170d978b LP |
5382 | p->runtime_scope = u->manager->runtime_scope; |
5383 | ||
004c7f16 LP |
5384 | p->confirm_spawn = manager_get_confirm_spawn(u->manager); |
5385 | p->cgroup_supported = u->manager->cgroup_supported; | |
5386 | p->prefix = u->manager->prefix; | |
5387 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
5388 | ||
5238e957 | 5389 | /* Copy parameters from unit */ |
7960b0c7 | 5390 | p->cgroup_path = u->cgroup_path; |
1d9cc876 | 5391 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
1ad6e8b3 | 5392 | |
2ad591a3 LP |
5393 | p->received_credentials_directory = u->manager->received_credentials_directory; |
5394 | p->received_encrypted_credentials_directory = u->manager->received_encrypted_credentials_directory; | |
bb0c0d6f | 5395 | |
1ad6e8b3 | 5396 | return 0; |
f0d47797 | 5397 | } |
a79279c7 | 5398 | |
4775b55d LP |
5399 | int unit_fork_helper_process(Unit *u, const char *name, PidRef *ret) { |
5400 | pid_t pid; | |
a79279c7 LP |
5401 | int r; |
5402 | ||
5403 | assert(u); | |
5404 | assert(ret); | |
5405 | ||
5406 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
5407 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
5408 | ||
5409 | (void) unit_realize_cgroup(u); | |
5410 | ||
4775b55d LP |
5411 | r = safe_fork(name, FORK_REOPEN_LOG|FORK_DEATHSIG, &pid); |
5412 | if (r < 0) | |
5413 | return r; | |
5414 | if (r > 0) { | |
5415 | _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL; | |
5416 | int q; | |
5417 | ||
5418 | /* Parent */ | |
5419 | ||
5420 | q = pidref_set_pid(&pidref, pid); | |
5421 | if (q < 0) | |
5422 | return q; | |
5423 | ||
5424 | *ret = TAKE_PIDREF(pidref); | |
4c253ed1 | 5425 | return r; |
4775b55d LP |
5426 | } |
5427 | ||
5428 | /* Child */ | |
a79279c7 | 5429 | |
9c274488 LP |
5430 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE); |
5431 | (void) ignore_signals(SIGPIPE); | |
a79279c7 | 5432 | |
4c253ed1 LP |
5433 | if (u->cgroup_path) { |
5434 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
5435 | if (r < 0) { | |
6178e2f8 | 5436 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", empty_to_root(u->cgroup_path)); |
4c253ed1 | 5437 | _exit(EXIT_CGROUP); |
a79279c7 | 5438 | } |
a79279c7 LP |
5439 | } |
5440 | ||
4c253ed1 | 5441 | return 0; |
a79279c7 | 5442 | } |
c999cf38 | 5443 | |
4775b55d LP |
5444 | int unit_fork_and_watch_rm_rf(Unit *u, char **paths, PidRef *ret_pid) { |
5445 | _cleanup_(pidref_done) PidRef pid = PIDREF_NULL; | |
810ef318 YW |
5446 | int r; |
5447 | ||
5448 | assert(u); | |
5449 | assert(ret_pid); | |
5450 | ||
5451 | r = unit_fork_helper_process(u, "(sd-rmrf)", &pid); | |
5452 | if (r < 0) | |
5453 | return r; | |
5454 | if (r == 0) { | |
5455 | int ret = EXIT_SUCCESS; | |
810ef318 YW |
5456 | |
5457 | STRV_FOREACH(i, paths) { | |
5458 | r = rm_rf(*i, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_MISSING_OK); | |
5459 | if (r < 0) { | |
5460 | log_error_errno(r, "Failed to remove '%s': %m", *i); | |
5461 | ret = EXIT_FAILURE; | |
5462 | } | |
5463 | } | |
5464 | ||
5465 | _exit(ret); | |
5466 | } | |
5467 | ||
495e75ed | 5468 | r = unit_watch_pidref(u, &pid, /* exclusive= */ true); |
810ef318 YW |
5469 | if (r < 0) |
5470 | return r; | |
5471 | ||
4775b55d | 5472 | *ret_pid = TAKE_PIDREF(pid); |
810ef318 YW |
5473 | return 0; |
5474 | } | |
5475 | ||
15ed3c3a LP |
5476 | static void unit_update_dependency_mask(Hashmap *deps, Unit *other, UnitDependencyInfo di) { |
5477 | assert(deps); | |
c999cf38 LP |
5478 | assert(other); |
5479 | ||
15ed3c3a | 5480 | if (di.origin_mask == 0 && di.destination_mask == 0) |
c999cf38 | 5481 | /* No bit set anymore, let's drop the whole entry */ |
15ed3c3a LP |
5482 | assert_se(hashmap_remove(deps, other)); |
5483 | else | |
c999cf38 | 5484 | /* Mask was reduced, let's update the entry */ |
15ed3c3a | 5485 | assert_se(hashmap_update(deps, other, di.data) == 0); |
c999cf38 LP |
5486 | } |
5487 | ||
5488 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
15ed3c3a | 5489 | Hashmap *deps; |
c999cf38 LP |
5490 | assert(u); |
5491 | ||
5492 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5493 | ||
5494 | if (mask == 0) | |
5495 | return; | |
5496 | ||
15ed3c3a | 5497 | HASHMAP_FOREACH(deps, u->dependencies) { |
c999cf38 LP |
5498 | bool done; |
5499 | ||
5500 | do { | |
5501 | UnitDependencyInfo di; | |
5502 | Unit *other; | |
c999cf38 LP |
5503 | |
5504 | done = true; | |
5505 | ||
15ed3c3a LP |
5506 | HASHMAP_FOREACH_KEY(di.data, other, deps) { |
5507 | Hashmap *other_deps; | |
5508 | ||
1d6cc5d0 | 5509 | if (FLAGS_SET(~mask, di.origin_mask)) |
c999cf38 | 5510 | continue; |
15ed3c3a | 5511 | |
c999cf38 | 5512 | di.origin_mask &= ~mask; |
15ed3c3a | 5513 | unit_update_dependency_mask(deps, other, di); |
c999cf38 | 5514 | |
defe63b0 LP |
5515 | /* We updated the dependency from our unit to the other unit now. But most |
5516 | * dependencies imply a reverse dependency. Hence, let's delete that one | |
5517 | * too. For that we go through all dependency types on the other unit and | |
5518 | * delete all those which point to us and have the right mask set. */ | |
c999cf38 | 5519 | |
15ed3c3a | 5520 | HASHMAP_FOREACH(other_deps, other->dependencies) { |
c999cf38 LP |
5521 | UnitDependencyInfo dj; |
5522 | ||
15ed3c3a | 5523 | dj.data = hashmap_get(other_deps, u); |
1d6cc5d0 | 5524 | if (FLAGS_SET(~mask, dj.destination_mask)) |
c999cf38 | 5525 | continue; |
c999cf38 | 5526 | |
15ed3c3a LP |
5527 | dj.destination_mask &= ~mask; |
5528 | unit_update_dependency_mask(other_deps, u, dj); | |
c999cf38 LP |
5529 | } |
5530 | ||
5531 | unit_add_to_gc_queue(other); | |
5532 | ||
156ba52b YW |
5533 | /* The unit 'other' may not be wanted by the unit 'u'. */ |
5534 | unit_submit_to_stop_when_unneeded_queue(other); | |
5535 | ||
c999cf38 LP |
5536 | done = false; |
5537 | break; | |
5538 | } | |
5539 | ||
5540 | } while (!done); | |
5541 | } | |
5542 | } | |
d3070fbd | 5543 | |
2f8c48b6 AZ |
5544 | static int unit_get_invocation_path(Unit *u, char **ret) { |
5545 | char *p; | |
5546 | int r; | |
5547 | ||
5548 | assert(u); | |
5549 | assert(ret); | |
5550 | ||
5551 | if (MANAGER_IS_SYSTEM(u->manager)) | |
5552 | p = strjoin("/run/systemd/units/invocation:", u->id); | |
5553 | else { | |
5554 | _cleanup_free_ char *user_path = NULL; | |
5555 | r = xdg_user_runtime_dir(&user_path, "/systemd/units/invocation:"); | |
5556 | if (r < 0) | |
5557 | return r; | |
5558 | p = strjoin(user_path, u->id); | |
5559 | } | |
5560 | ||
5561 | if (!p) | |
5562 | return -ENOMEM; | |
5563 | ||
5564 | *ret = p; | |
5565 | return 0; | |
5566 | } | |
5567 | ||
d3070fbd | 5568 | static int unit_export_invocation_id(Unit *u) { |
2f8c48b6 | 5569 | _cleanup_free_ char *p = NULL; |
d3070fbd LP |
5570 | int r; |
5571 | ||
5572 | assert(u); | |
5573 | ||
5574 | if (u->exported_invocation_id) | |
5575 | return 0; | |
5576 | ||
5577 | if (sd_id128_is_null(u->invocation_id)) | |
5578 | return 0; | |
5579 | ||
2f8c48b6 AZ |
5580 | r = unit_get_invocation_path(u, &p); |
5581 | if (r < 0) | |
5582 | return log_unit_debug_errno(u, r, "Failed to get invocation path: %m"); | |
5583 | ||
a3f5fd96 | 5584 | r = symlink_atomic_label(u->invocation_id_string, p); |
d3070fbd LP |
5585 | if (r < 0) |
5586 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5587 | ||
5588 | u->exported_invocation_id = true; | |
5589 | return 0; | |
5590 | } | |
5591 | ||
5592 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5593 | const char *p; | |
5594 | char buf[2]; | |
5595 | int r; | |
5596 | ||
5597 | assert(u); | |
5598 | assert(c); | |
5599 | ||
5600 | if (u->exported_log_level_max) | |
5601 | return 0; | |
5602 | ||
5603 | if (c->log_level_max < 0) | |
5604 | return 0; | |
5605 | ||
5606 | assert(c->log_level_max <= 7); | |
5607 | ||
5608 | buf[0] = '0' + c->log_level_max; | |
5609 | buf[1] = 0; | |
5610 | ||
5611 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5612 | r = symlink_atomic(buf, p); | |
5613 | if (r < 0) | |
5614 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5615 | ||
5616 | u->exported_log_level_max = true; | |
5617 | return 0; | |
5618 | } | |
5619 | ||
5620 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
254d1313 | 5621 | _cleanup_close_ int fd = -EBADF; |
d3070fbd LP |
5622 | struct iovec *iovec; |
5623 | const char *p; | |
5624 | char *pattern; | |
5625 | le64_t *sizes; | |
5626 | ssize_t n; | |
d3070fbd LP |
5627 | int r; |
5628 | ||
5629 | if (u->exported_log_extra_fields) | |
5630 | return 0; | |
5631 | ||
5632 | if (c->n_log_extra_fields <= 0) | |
5633 | return 0; | |
5634 | ||
5635 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5636 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5637 | ||
12375b95 | 5638 | for (size_t i = 0; i < c->n_log_extra_fields; i++) { |
d3070fbd LP |
5639 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); |
5640 | ||
5641 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5642 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5643 | } | |
5644 | ||
5645 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5646 | pattern = strjoina(p, ".XXXXXX"); | |
5647 | ||
5648 | fd = mkostemp_safe(pattern); | |
5649 | if (fd < 0) | |
5650 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5651 | ||
5652 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5653 | if (n < 0) { | |
5654 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5655 | goto fail; | |
5656 | } | |
5657 | ||
5658 | (void) fchmod(fd, 0644); | |
5659 | ||
5660 | if (rename(pattern, p) < 0) { | |
5661 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5662 | goto fail; | |
5663 | } | |
5664 | ||
5665 | u->exported_log_extra_fields = true; | |
5666 | return 0; | |
5667 | ||
5668 | fail: | |
5669 | (void) unlink(pattern); | |
5670 | return r; | |
5671 | } | |
5672 | ||
5ac1530e | 5673 | static int unit_export_log_ratelimit_interval(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5674 | _cleanup_free_ char *buf = NULL; |
5675 | const char *p; | |
5676 | int r; | |
5677 | ||
5678 | assert(u); | |
5679 | assert(c); | |
5680 | ||
5ac1530e | 5681 | if (u->exported_log_ratelimit_interval) |
90fc172e AZ |
5682 | return 0; |
5683 | ||
5ac1530e | 5684 | if (c->log_ratelimit_interval_usec == 0) |
90fc172e AZ |
5685 | return 0; |
5686 | ||
5687 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5688 | ||
5ac1530e | 5689 | if (asprintf(&buf, "%" PRIu64, c->log_ratelimit_interval_usec) < 0) |
90fc172e AZ |
5690 | return log_oom(); |
5691 | ||
5692 | r = symlink_atomic(buf, p); | |
5693 | if (r < 0) | |
5694 | return log_unit_debug_errno(u, r, "Failed to create log rate limit interval symlink %s: %m", p); | |
5695 | ||
5ac1530e | 5696 | u->exported_log_ratelimit_interval = true; |
90fc172e AZ |
5697 | return 0; |
5698 | } | |
5699 | ||
5ac1530e | 5700 | static int unit_export_log_ratelimit_burst(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5701 | _cleanup_free_ char *buf = NULL; |
5702 | const char *p; | |
5703 | int r; | |
5704 | ||
5705 | assert(u); | |
5706 | assert(c); | |
5707 | ||
5ac1530e | 5708 | if (u->exported_log_ratelimit_burst) |
90fc172e AZ |
5709 | return 0; |
5710 | ||
5ac1530e | 5711 | if (c->log_ratelimit_burst == 0) |
90fc172e AZ |
5712 | return 0; |
5713 | ||
5714 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5715 | ||
5ac1530e | 5716 | if (asprintf(&buf, "%u", c->log_ratelimit_burst) < 0) |
90fc172e AZ |
5717 | return log_oom(); |
5718 | ||
5719 | r = symlink_atomic(buf, p); | |
5720 | if (r < 0) | |
5721 | return log_unit_debug_errno(u, r, "Failed to create log rate limit burst symlink %s: %m", p); | |
5722 | ||
5ac1530e | 5723 | u->exported_log_ratelimit_burst = true; |
90fc172e AZ |
5724 | return 0; |
5725 | } | |
5726 | ||
d3070fbd LP |
5727 | void unit_export_state_files(Unit *u) { |
5728 | const ExecContext *c; | |
5729 | ||
5730 | assert(u); | |
5731 | ||
5732 | if (!u->id) | |
5733 | return; | |
5734 | ||
638cece4 | 5735 | if (MANAGER_IS_TEST_RUN(u->manager)) |
8f632531 LP |
5736 | return; |
5737 | ||
d3070fbd LP |
5738 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5739 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5740 | * the IPC system itself and PID 1 also log to the journal. | |
5741 | * | |
5742 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5743 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5744 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5745 | * namespace at least. | |
5746 | * | |
5747 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5748 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5749 | * them with one. */ | |
5750 | ||
5751 | (void) unit_export_invocation_id(u); | |
5752 | ||
2f8c48b6 AZ |
5753 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5754 | return; | |
5755 | ||
d3070fbd LP |
5756 | c = unit_get_exec_context(u); |
5757 | if (c) { | |
5758 | (void) unit_export_log_level_max(u, c); | |
5759 | (void) unit_export_log_extra_fields(u, c); | |
5ac1530e ZJS |
5760 | (void) unit_export_log_ratelimit_interval(u, c); |
5761 | (void) unit_export_log_ratelimit_burst(u, c); | |
d3070fbd LP |
5762 | } |
5763 | } | |
5764 | ||
5765 | void unit_unlink_state_files(Unit *u) { | |
5766 | const char *p; | |
5767 | ||
5768 | assert(u); | |
5769 | ||
5770 | if (!u->id) | |
5771 | return; | |
5772 | ||
d3070fbd LP |
5773 | /* Undoes the effect of unit_export_state() */ |
5774 | ||
5775 | if (u->exported_invocation_id) { | |
2f8c48b6 AZ |
5776 | _cleanup_free_ char *invocation_path = NULL; |
5777 | int r = unit_get_invocation_path(u, &invocation_path); | |
5778 | if (r >= 0) { | |
5779 | (void) unlink(invocation_path); | |
5780 | u->exported_invocation_id = false; | |
5781 | } | |
d3070fbd LP |
5782 | } |
5783 | ||
2f8c48b6 AZ |
5784 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5785 | return; | |
5786 | ||
d3070fbd LP |
5787 | if (u->exported_log_level_max) { |
5788 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5789 | (void) unlink(p); | |
5790 | ||
5791 | u->exported_log_level_max = false; | |
5792 | } | |
5793 | ||
5794 | if (u->exported_log_extra_fields) { | |
5795 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5796 | (void) unlink(p); | |
5797 | ||
5798 | u->exported_log_extra_fields = false; | |
5799 | } | |
90fc172e | 5800 | |
5ac1530e | 5801 | if (u->exported_log_ratelimit_interval) { |
90fc172e AZ |
5802 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); |
5803 | (void) unlink(p); | |
5804 | ||
5ac1530e | 5805 | u->exported_log_ratelimit_interval = false; |
90fc172e AZ |
5806 | } |
5807 | ||
5ac1530e | 5808 | if (u->exported_log_ratelimit_burst) { |
90fc172e AZ |
5809 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); |
5810 | (void) unlink(p); | |
5811 | ||
5ac1530e | 5812 | u->exported_log_ratelimit_burst = false; |
90fc172e | 5813 | } |
d3070fbd | 5814 | } |
5afe510c | 5815 | |
3c7416b6 LP |
5816 | int unit_prepare_exec(Unit *u) { |
5817 | int r; | |
5818 | ||
5819 | assert(u); | |
5820 | ||
fab34748 KL |
5821 | /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable. |
5822 | * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */ | |
5823 | r = bpf_firewall_load_custom(u); | |
5824 | if (r < 0) | |
5825 | return r; | |
5826 | ||
3c7416b6 LP |
5827 | /* Prepares everything so that we can fork of a process for this unit */ |
5828 | ||
5829 | (void) unit_realize_cgroup(u); | |
5830 | ||
5831 | if (u->reset_accounting) { | |
9b2559a1 | 5832 | (void) unit_reset_accounting(u); |
3c7416b6 LP |
5833 | u->reset_accounting = false; |
5834 | } | |
5835 | ||
5836 | unit_export_state_files(u); | |
5837 | ||
5838 | r = unit_setup_exec_runtime(u); | |
5839 | if (r < 0) | |
5840 | return r; | |
5841 | ||
3c7416b6 LP |
5842 | return 0; |
5843 | } | |
5844 | ||
4c425434 LP |
5845 | static bool ignore_leftover_process(const char *comm) { |
5846 | return comm && comm[0] == '('; /* Most likely our own helper process (PAM?), ignore */ | |
5847 | } | |
5848 | ||
5849 | int unit_log_leftover_process_start(pid_t pid, int sig, void *userdata) { | |
a4634b21 LP |
5850 | _cleanup_free_ char *comm = NULL; |
5851 | ||
5852 | (void) get_process_comm(pid, &comm); | |
5853 | ||
4c425434 | 5854 | if (ignore_leftover_process(comm)) |
c53d2d54 | 5855 | return 0; |
a4634b21 | 5856 | |
4c425434 LP |
5857 | /* During start we print a warning */ |
5858 | ||
a4634b21 LP |
5859 | log_unit_warning(userdata, |
5860 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5861 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5862 | pid, strna(comm)); | |
c53d2d54 DB |
5863 | |
5864 | return 1; | |
a4634b21 LP |
5865 | } |
5866 | ||
4c425434 LP |
5867 | int unit_log_leftover_process_stop(pid_t pid, int sig, void *userdata) { |
5868 | _cleanup_free_ char *comm = NULL; | |
5869 | ||
5870 | (void) get_process_comm(pid, &comm); | |
5871 | ||
5872 | if (ignore_leftover_process(comm)) | |
5873 | return 0; | |
5874 | ||
5875 | /* During stop we only print an informational message */ | |
5876 | ||
5877 | log_unit_info(userdata, | |
5878 | "Unit process " PID_FMT " (%s) remains running after unit stopped.", | |
5879 | pid, strna(comm)); | |
5880 | ||
5881 | return 1; | |
5882 | } | |
5883 | ||
5884 | int unit_warn_leftover_processes(Unit *u, cg_kill_log_func_t log_func) { | |
a4634b21 LP |
5885 | assert(u); |
5886 | ||
5887 | (void) unit_pick_cgroup_path(u); | |
5888 | ||
5889 | if (!u->cgroup_path) | |
c53d2d54 | 5890 | return 0; |
a4634b21 | 5891 | |
4c425434 | 5892 | return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_func, u); |
a4634b21 LP |
5893 | } |
5894 | ||
bb2c7685 LP |
5895 | bool unit_needs_console(Unit *u) { |
5896 | ExecContext *ec; | |
5897 | UnitActiveState state; | |
5898 | ||
5899 | assert(u); | |
5900 | ||
5901 | state = unit_active_state(u); | |
5902 | ||
5903 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5904 | return false; | |
5905 | ||
5906 | if (UNIT_VTABLE(u)->needs_console) | |
5907 | return UNIT_VTABLE(u)->needs_console(u); | |
5908 | ||
5909 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5910 | ec = unit_get_exec_context(u); | |
5911 | if (!ec) | |
5912 | return false; | |
5913 | ||
5914 | return exec_context_may_touch_console(ec); | |
5915 | } | |
5916 | ||
495e75ed | 5917 | int unit_pid_attachable(Unit *u, PidRef *pid, sd_bus_error *error) { |
6592b975 LP |
5918 | int r; |
5919 | ||
5920 | assert(u); | |
5921 | ||
5922 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5923 | * and not a kernel thread either */ | |
5924 | ||
5925 | /* First, a simple range check */ | |
495e75ed LP |
5926 | if (!pidref_is_set(pid)) |
5927 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier is not valid."); | |
6592b975 LP |
5928 | |
5929 | /* Some extra safety check */ | |
495e75ed LP |
5930 | if (pid->pid == 1 || pid->pid == getpid_cached()) |
5931 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager process, refusing.", pid->pid); | |
6592b975 LP |
5932 | |
5933 | /* Don't even begin to bother with kernel threads */ | |
495e75ed | 5934 | r = is_kernel_thread(pid->pid); |
6592b975 | 5935 | if (r == -ESRCH) |
495e75ed | 5936 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid->pid); |
6592b975 | 5937 | if (r < 0) |
495e75ed | 5938 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid->pid); |
6592b975 | 5939 | if (r > 0) |
495e75ed | 5940 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid->pid); |
6592b975 LP |
5941 | |
5942 | return 0; | |
5943 | } | |
5944 | ||
523ee2d4 LP |
5945 | void unit_log_success(Unit *u) { |
5946 | assert(u); | |
5947 | ||
edf2ee22 JM |
5948 | /* Let's show message "Deactivated successfully" in debug mode (when manager is user) rather than in info mode. |
5949 | * This message has low information value for regular users and it might be a bit overwhelming on a system with | |
5950 | * a lot of devices. */ | |
5951 | log_unit_struct(u, | |
5952 | MANAGER_IS_USER(u->manager) ? LOG_DEBUG : LOG_INFO, | |
c2503e35 RH |
5953 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR, |
5954 | LOG_UNIT_INVOCATION_ID(u), | |
5955 | LOG_UNIT_MESSAGE(u, "Deactivated successfully.")); | |
523ee2d4 LP |
5956 | } |
5957 | ||
7c047d74 LP |
5958 | void unit_log_failure(Unit *u, const char *result) { |
5959 | assert(u); | |
5960 | assert(result); | |
5961 | ||
c2503e35 RH |
5962 | log_unit_struct(u, LOG_WARNING, |
5963 | "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR, | |
5964 | LOG_UNIT_INVOCATION_ID(u), | |
5965 | LOG_UNIT_MESSAGE(u, "Failed with result '%s'.", result), | |
5966 | "UNIT_RESULT=%s", result); | |
7c047d74 LP |
5967 | } |
5968 | ||
31cd5f63 AZ |
5969 | void unit_log_skip(Unit *u, const char *result) { |
5970 | assert(u); | |
5971 | assert(result); | |
5972 | ||
c2503e35 RH |
5973 | log_unit_struct(u, LOG_INFO, |
5974 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR, | |
5975 | LOG_UNIT_INVOCATION_ID(u), | |
5976 | LOG_UNIT_MESSAGE(u, "Skipped due to '%s'.", result), | |
5977 | "UNIT_RESULT=%s", result); | |
31cd5f63 AZ |
5978 | } |
5979 | ||
91bbd9b7 LP |
5980 | void unit_log_process_exit( |
5981 | Unit *u, | |
91bbd9b7 LP |
5982 | const char *kind, |
5983 | const char *command, | |
5cc2cd1c | 5984 | bool success, |
91bbd9b7 LP |
5985 | int code, |
5986 | int status) { | |
5987 | ||
5cc2cd1c ZJS |
5988 | int level; |
5989 | ||
91bbd9b7 LP |
5990 | assert(u); |
5991 | assert(kind); | |
5992 | ||
5cc2cd1c ZJS |
5993 | /* If this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure |
5994 | * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption | |
5995 | * that the service already logged the reason at a higher log level on its own. Otherwise, make it a | |
5996 | * WARNING. */ | |
5997 | if (success) | |
5998 | level = LOG_DEBUG; | |
5999 | else if (code == CLD_EXITED) | |
6000 | level = LOG_NOTICE; | |
6001 | else | |
91bbd9b7 LP |
6002 | level = LOG_WARNING; |
6003 | ||
c2503e35 RH |
6004 | log_unit_struct(u, level, |
6005 | "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR, | |
58441bc1 | 6006 | LOG_UNIT_MESSAGE(u, "%s exited, code=%s, status=%i/%s%s", |
c2503e35 RH |
6007 | kind, |
6008 | sigchld_code_to_string(code), status, | |
6009 | strna(code == CLD_EXITED | |
6010 | ? exit_status_to_string(status, EXIT_STATUS_FULL) | |
58441bc1 ZJS |
6011 | : signal_to_string(status)), |
6012 | success ? " (success)" : ""), | |
c2503e35 RH |
6013 | "EXIT_CODE=%s", sigchld_code_to_string(code), |
6014 | "EXIT_STATUS=%i", status, | |
6015 | "COMMAND=%s", strna(command), | |
6016 | LOG_UNIT_INVOCATION_ID(u)); | |
91bbd9b7 LP |
6017 | } |
6018 | ||
7af67e9a LP |
6019 | int unit_exit_status(Unit *u) { |
6020 | assert(u); | |
6021 | ||
6022 | /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range | |
6023 | * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA | |
6024 | * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main | |
6025 | * service process has exited abnormally (signal/coredump). */ | |
6026 | ||
6027 | if (!UNIT_VTABLE(u)->exit_status) | |
6028 | return -EOPNOTSUPP; | |
6029 | ||
6030 | return UNIT_VTABLE(u)->exit_status(u); | |
6031 | } | |
6032 | ||
6033 | int unit_failure_action_exit_status(Unit *u) { | |
6034 | int r; | |
6035 | ||
6036 | assert(u); | |
6037 | ||
6038 | /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */ | |
6039 | ||
6040 | if (u->failure_action_exit_status >= 0) | |
6041 | return u->failure_action_exit_status; | |
6042 | ||
6043 | r = unit_exit_status(u); | |
6044 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
6045 | return 255; | |
6046 | ||
6047 | return r; | |
6048 | } | |
6049 | ||
6050 | int unit_success_action_exit_status(Unit *u) { | |
6051 | int r; | |
6052 | ||
6053 | assert(u); | |
6054 | ||
6055 | /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */ | |
6056 | ||
6057 | if (u->success_action_exit_status >= 0) | |
6058 | return u->success_action_exit_status; | |
6059 | ||
6060 | r = unit_exit_status(u); | |
6061 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
6062 | return 255; | |
6063 | ||
6064 | return r; | |
6065 | } | |
6066 | ||
a4191c9f LP |
6067 | int unit_test_trigger_loaded(Unit *u) { |
6068 | Unit *trigger; | |
6069 | ||
6070 | /* Tests whether the unit to trigger is loaded */ | |
6071 | ||
6072 | trigger = UNIT_TRIGGER(u); | |
6073 | if (!trigger) | |
e7b9f4d9 ZJS |
6074 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
6075 | "Refusing to start, no unit to trigger."); | |
a4191c9f | 6076 | if (trigger->load_state != UNIT_LOADED) |
e7b9f4d9 ZJS |
6077 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
6078 | "Refusing to start, unit %s to trigger not loaded.", trigger->id); | |
a4191c9f LP |
6079 | |
6080 | return 0; | |
6081 | } | |
6082 | ||
bb0c0d6f LP |
6083 | void unit_destroy_runtime_data(Unit *u, const ExecContext *context) { |
6084 | assert(u); | |
6085 | assert(context); | |
6086 | ||
1ba84fef LP |
6087 | /* EXEC_PRESERVE_RESTART is handled via unit_release_resources()! */ |
6088 | if (context->runtime_directory_preserve_mode == EXEC_PRESERVE_NO) | |
95939aed | 6089 | exec_context_destroy_runtime_directory(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME]); |
bb0c0d6f | 6090 | |
1e122561 | 6091 | exec_context_destroy_credentials(u); |
b9f976fb | 6092 | exec_context_destroy_mount_ns_dir(u); |
95939aed YW |
6093 | } |
6094 | ||
380dc8b0 LP |
6095 | int unit_clean(Unit *u, ExecCleanMask mask) { |
6096 | UnitActiveState state; | |
6097 | ||
6098 | assert(u); | |
6099 | ||
6100 | /* Special return values: | |
6101 | * | |
6102 | * -EOPNOTSUPP → cleaning not supported for this unit type | |
6103 | * -EUNATCH → cleaning not defined for this resource type | |
6104 | * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has | |
6105 | * a job queued or similar | |
6106 | */ | |
6107 | ||
6108 | if (!UNIT_VTABLE(u)->clean) | |
6109 | return -EOPNOTSUPP; | |
6110 | ||
6111 | if (mask == 0) | |
6112 | return -EUNATCH; | |
6113 | ||
6114 | if (u->load_state != UNIT_LOADED) | |
6115 | return -EBUSY; | |
6116 | ||
6117 | if (u->job) | |
6118 | return -EBUSY; | |
6119 | ||
6120 | state = unit_active_state(u); | |
4f06325c | 6121 | if (state != UNIT_INACTIVE) |
380dc8b0 LP |
6122 | return -EBUSY; |
6123 | ||
6124 | return UNIT_VTABLE(u)->clean(u, mask); | |
6125 | } | |
6126 | ||
6127 | int unit_can_clean(Unit *u, ExecCleanMask *ret) { | |
6128 | assert(u); | |
6129 | ||
6130 | if (!UNIT_VTABLE(u)->clean || | |
6131 | u->load_state != UNIT_LOADED) { | |
6132 | *ret = 0; | |
6133 | return 0; | |
6134 | } | |
6135 | ||
6136 | /* When the clean() method is set, can_clean() really should be set too */ | |
6137 | assert(UNIT_VTABLE(u)->can_clean); | |
6138 | ||
6139 | return UNIT_VTABLE(u)->can_clean(u, ret); | |
6140 | } | |
6141 | ||
d9e45bc3 MS |
6142 | bool unit_can_freeze(Unit *u) { |
6143 | assert(u); | |
6144 | ||
6145 | if (UNIT_VTABLE(u)->can_freeze) | |
6146 | return UNIT_VTABLE(u)->can_freeze(u); | |
6147 | ||
6148 | return UNIT_VTABLE(u)->freeze; | |
6149 | } | |
6150 | ||
6151 | void unit_frozen(Unit *u) { | |
6152 | assert(u); | |
6153 | ||
6154 | u->freezer_state = FREEZER_FROZEN; | |
6155 | ||
3d19e122 | 6156 | bus_unit_send_pending_freezer_message(u, false); |
d9e45bc3 MS |
6157 | } |
6158 | ||
6159 | void unit_thawed(Unit *u) { | |
6160 | assert(u); | |
6161 | ||
6162 | u->freezer_state = FREEZER_RUNNING; | |
6163 | ||
3d19e122 | 6164 | bus_unit_send_pending_freezer_message(u, false); |
d9e45bc3 MS |
6165 | } |
6166 | ||
6167 | static int unit_freezer_action(Unit *u, FreezerAction action) { | |
6168 | UnitActiveState s; | |
6169 | int (*method)(Unit*); | |
6170 | int r; | |
6171 | ||
6172 | assert(u); | |
6173 | assert(IN_SET(action, FREEZER_FREEZE, FREEZER_THAW)); | |
6174 | ||
6175 | method = action == FREEZER_FREEZE ? UNIT_VTABLE(u)->freeze : UNIT_VTABLE(u)->thaw; | |
6176 | if (!method || !cg_freezer_supported()) | |
6177 | return -EOPNOTSUPP; | |
6178 | ||
6179 | if (u->job) | |
6180 | return -EBUSY; | |
6181 | ||
6182 | if (u->load_state != UNIT_LOADED) | |
6183 | return -EHOSTDOWN; | |
6184 | ||
6185 | s = unit_active_state(u); | |
6186 | if (s != UNIT_ACTIVE) | |
6187 | return -EHOSTDOWN; | |
6188 | ||
3d19e122 | 6189 | if ((IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_THAWING) && action == FREEZER_FREEZE) || |
6190 | (u->freezer_state == FREEZER_THAWING && action == FREEZER_THAW)) | |
d9e45bc3 MS |
6191 | return -EALREADY; |
6192 | ||
6193 | r = method(u); | |
6194 | if (r <= 0) | |
6195 | return r; | |
6196 | ||
d171e72e YW |
6197 | assert(IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_THAWING)); |
6198 | ||
d9e45bc3 MS |
6199 | return 1; |
6200 | } | |
6201 | ||
6202 | int unit_freeze(Unit *u) { | |
6203 | return unit_freezer_action(u, FREEZER_FREEZE); | |
6204 | } | |
6205 | ||
6206 | int unit_thaw(Unit *u) { | |
6207 | return unit_freezer_action(u, FREEZER_THAW); | |
6208 | } | |
6209 | ||
6210 | /* Wrappers around low-level cgroup freezer operations common for service and scope units */ | |
6211 | int unit_freeze_vtable_common(Unit *u) { | |
6212 | return unit_cgroup_freezer_action(u, FREEZER_FREEZE); | |
6213 | } | |
6214 | ||
6215 | int unit_thaw_vtable_common(Unit *u) { | |
6216 | return unit_cgroup_freezer_action(u, FREEZER_THAW); | |
6217 | } | |
6218 | ||
6e548561 | 6219 | Condition *unit_find_failed_condition(Unit *u) { |
03677889 | 6220 | Condition *failed_trigger = NULL; |
6e548561 DDM |
6221 | bool has_succeeded_trigger = false; |
6222 | ||
6223 | if (u->condition_result) | |
6224 | return NULL; | |
6225 | ||
6226 | LIST_FOREACH(conditions, c, u->conditions) | |
6227 | if (c->trigger) { | |
6228 | if (c->result == CONDITION_SUCCEEDED) | |
6229 | has_succeeded_trigger = true; | |
6230 | else if (!failed_trigger) | |
6231 | failed_trigger = c; | |
6232 | } else if (c->result != CONDITION_SUCCEEDED) | |
6233 | return c; | |
6234 | ||
6235 | return failed_trigger && !has_succeeded_trigger ? failed_trigger : NULL; | |
6236 | } | |
6237 | ||
5afe510c LP |
6238 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
6239 | [COLLECT_INACTIVE] = "inactive", | |
6240 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
6241 | }; | |
6242 | ||
6243 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); | |
15ed3c3a LP |
6244 | |
6245 | Unit* unit_has_dependency(const Unit *u, UnitDependencyAtom atom, Unit *other) { | |
6246 | Unit *i; | |
6247 | ||
6248 | assert(u); | |
6249 | ||
6250 | /* Checks if the unit has a dependency on 'other' with the specified dependency atom. If 'other' is | |
6251 | * NULL checks if the unit has *any* dependency of that atom. Returns 'other' if found (or if 'other' | |
6252 | * is NULL the first entry found), or NULL if not found. */ | |
6253 | ||
6254 | UNIT_FOREACH_DEPENDENCY(i, u, atom) | |
6255 | if (!other || other == i) | |
6256 | return i; | |
6257 | ||
6258 | return NULL; | |
6259 | } | |
6260 | ||
6261 | int unit_get_dependency_array(const Unit *u, UnitDependencyAtom atom, Unit ***ret_array) { | |
6262 | _cleanup_free_ Unit **array = NULL; | |
6263 | size_t n = 0; | |
6264 | Unit *other; | |
6265 | ||
6266 | assert(u); | |
6267 | assert(ret_array); | |
6268 | ||
6269 | /* Gets a list of units matching a specific atom as array. This is useful when iterating through | |
6270 | * dependencies while modifying them: the array is an "atomic snapshot" of sorts, that can be read | |
48008c1c | 6271 | * while the dependency table is continuously updated. */ |
15ed3c3a LP |
6272 | |
6273 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
6274 | if (!GREEDY_REALLOC(array, n + 1)) | |
6275 | return -ENOMEM; | |
6276 | ||
6277 | array[n++] = other; | |
6278 | } | |
6279 | ||
6280 | *ret_array = TAKE_PTR(array); | |
6281 | ||
6282 | assert(n <= INT_MAX); | |
6283 | return (int) n; | |
6284 | } | |
48b92b37 | 6285 | |
83123a44 YW |
6286 | int unit_get_transitive_dependency_set(Unit *u, UnitDependencyAtom atom, Set **ret) { |
6287 | _cleanup_set_free_ Set *units = NULL, *queue = NULL; | |
6288 | Unit *other; | |
6289 | int r; | |
6290 | ||
6291 | assert(u); | |
6292 | assert(ret); | |
6293 | ||
6294 | /* Similar to unit_get_dependency_array(), but also search the same dependency in other units. */ | |
6295 | ||
6296 | do { | |
6297 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
6298 | r = set_ensure_put(&units, NULL, other); | |
6299 | if (r < 0) | |
6300 | return r; | |
6301 | if (r == 0) | |
6302 | continue; | |
6303 | r = set_ensure_put(&queue, NULL, other); | |
6304 | if (r < 0) | |
6305 | return r; | |
6306 | } | |
6307 | } while ((u = set_steal_first(queue))); | |
6308 | ||
6309 | *ret = TAKE_PTR(units); | |
6310 | return 0; | |
6311 | } | |
6312 | ||
e9276800 LP |
6313 | int unit_arm_timer( |
6314 | Unit *u, | |
6315 | sd_event_source **source, | |
6316 | bool relative, | |
6317 | usec_t usec, | |
6318 | sd_event_time_handler_t handler) { | |
6319 | ||
6320 | int r; | |
6321 | ||
6322 | assert(u); | |
6323 | assert(source); | |
6324 | assert(handler); | |
6325 | ||
6326 | if (*source) { | |
6327 | if (usec == USEC_INFINITY) | |
6328 | return sd_event_source_set_enabled(*source, SD_EVENT_OFF); | |
6329 | ||
6330 | r = (relative ? sd_event_source_set_time_relative : sd_event_source_set_time)(*source, usec); | |
6331 | if (r < 0) | |
6332 | return r; | |
6333 | ||
6334 | return sd_event_source_set_enabled(*source, SD_EVENT_ONESHOT); | |
6335 | } | |
6336 | ||
6337 | if (usec == USEC_INFINITY) | |
6338 | return 0; | |
6339 | ||
6340 | r = (relative ? sd_event_add_time_relative : sd_event_add_time)( | |
6341 | u->manager->event, | |
6342 | source, | |
6343 | CLOCK_MONOTONIC, | |
6344 | usec, 0, | |
6345 | handler, | |
6346 | u); | |
6347 | if (r < 0) | |
6348 | return r; | |
6349 | ||
6350 | const char *d = strjoina(unit_type_to_string(u->type), "-timer"); | |
6351 | (void) sd_event_source_set_description(*source, d); | |
6352 | ||
6353 | return 0; | |
6354 | } | |
6355 | ||
48b92b37 | 6356 | const ActivationDetailsVTable * const activation_details_vtable[_UNIT_TYPE_MAX] = { |
4c420328 | 6357 | [UNIT_PATH] = &activation_details_path_vtable, |
c8bc7519 | 6358 | [UNIT_TIMER] = &activation_details_timer_vtable, |
48b92b37 LB |
6359 | }; |
6360 | ||
6361 | ActivationDetails *activation_details_new(Unit *trigger_unit) { | |
6362 | _cleanup_free_ ActivationDetails *details = NULL; | |
6363 | ||
6364 | assert(trigger_unit); | |
6365 | assert(trigger_unit->type != _UNIT_TYPE_INVALID); | |
6366 | assert(trigger_unit->id); | |
6367 | ||
6368 | details = malloc0(activation_details_vtable[trigger_unit->type]->object_size); | |
6369 | if (!details) | |
6370 | return NULL; | |
6371 | ||
6372 | *details = (ActivationDetails) { | |
6373 | .n_ref = 1, | |
6374 | .trigger_unit_type = trigger_unit->type, | |
6375 | }; | |
6376 | ||
6377 | details->trigger_unit_name = strdup(trigger_unit->id); | |
6378 | if (!details->trigger_unit_name) | |
6379 | return NULL; | |
6380 | ||
6381 | if (ACTIVATION_DETAILS_VTABLE(details)->init) | |
6382 | ACTIVATION_DETAILS_VTABLE(details)->init(details, trigger_unit); | |
6383 | ||
6384 | return TAKE_PTR(details); | |
6385 | } | |
6386 | ||
6387 | static ActivationDetails *activation_details_free(ActivationDetails *details) { | |
6388 | if (!details) | |
6389 | return NULL; | |
6390 | ||
6391 | if (ACTIVATION_DETAILS_VTABLE(details)->done) | |
6392 | ACTIVATION_DETAILS_VTABLE(details)->done(details); | |
6393 | ||
6394 | free(details->trigger_unit_name); | |
6395 | ||
6396 | return mfree(details); | |
6397 | } | |
6398 | ||
6399 | void activation_details_serialize(ActivationDetails *details, FILE *f) { | |
6400 | if (!details || details->trigger_unit_type == _UNIT_TYPE_INVALID) | |
6401 | return; | |
6402 | ||
6403 | (void) serialize_item(f, "activation-details-unit-type", unit_type_to_string(details->trigger_unit_type)); | |
6404 | if (details->trigger_unit_name) | |
6405 | (void) serialize_item(f, "activation-details-unit-name", details->trigger_unit_name); | |
6406 | if (ACTIVATION_DETAILS_VTABLE(details)->serialize) | |
6407 | ACTIVATION_DETAILS_VTABLE(details)->serialize(details, f); | |
6408 | } | |
6409 | ||
6410 | int activation_details_deserialize(const char *key, const char *value, ActivationDetails **details) { | |
e8dba806 FS |
6411 | int r; |
6412 | ||
48b92b37 LB |
6413 | assert(key); |
6414 | assert(value); | |
6415 | assert(details); | |
6416 | ||
6417 | if (!*details) { | |
6418 | UnitType t; | |
6419 | ||
6420 | if (!streq(key, "activation-details-unit-type")) | |
6421 | return -EINVAL; | |
6422 | ||
6423 | t = unit_type_from_string(value); | |
210cb8d6 YW |
6424 | if (t < 0) |
6425 | return t; | |
6426 | ||
6427 | /* The activation details vtable has defined ops only for path and timer units */ | |
6428 | if (!activation_details_vtable[t]) | |
48b92b37 LB |
6429 | return -EINVAL; |
6430 | ||
6431 | *details = malloc0(activation_details_vtable[t]->object_size); | |
6432 | if (!*details) | |
6433 | return -ENOMEM; | |
6434 | ||
6435 | **details = (ActivationDetails) { | |
6436 | .n_ref = 1, | |
6437 | .trigger_unit_type = t, | |
6438 | }; | |
6439 | ||
6440 | return 0; | |
6441 | } | |
6442 | ||
6443 | if (streq(key, "activation-details-unit-name")) { | |
e8dba806 FS |
6444 | r = free_and_strdup(&(*details)->trigger_unit_name, value); |
6445 | if (r < 0) | |
6446 | return r; | |
48b92b37 LB |
6447 | |
6448 | return 0; | |
6449 | } | |
6450 | ||
6451 | if (ACTIVATION_DETAILS_VTABLE(*details)->deserialize) | |
6452 | return ACTIVATION_DETAILS_VTABLE(*details)->deserialize(key, value, details); | |
6453 | ||
6454 | return -EINVAL; | |
6455 | } | |
6456 | ||
6457 | int activation_details_append_env(ActivationDetails *details, char ***strv) { | |
6458 | int r = 0; | |
6459 | ||
6460 | assert(strv); | |
6461 | ||
6462 | if (!details) | |
6463 | return 0; | |
6464 | ||
6465 | if (!isempty(details->trigger_unit_name)) { | |
6466 | char *s = strjoin("TRIGGER_UNIT=", details->trigger_unit_name); | |
6467 | if (!s) | |
6468 | return -ENOMEM; | |
6469 | ||
6470 | r = strv_consume(strv, TAKE_PTR(s)); | |
6471 | if (r < 0) | |
6472 | return r; | |
6473 | } | |
6474 | ||
6475 | if (ACTIVATION_DETAILS_VTABLE(details)->append_env) { | |
6476 | r = ACTIVATION_DETAILS_VTABLE(details)->append_env(details, strv); | |
6477 | if (r < 0) | |
6478 | return r; | |
6479 | } | |
6480 | ||
6481 | return r + !isempty(details->trigger_unit_name); /* Return the number of variables added to the env block */ | |
6482 | } | |
6483 | ||
6484 | int activation_details_append_pair(ActivationDetails *details, char ***strv) { | |
6485 | int r = 0; | |
6486 | ||
6487 | assert(strv); | |
6488 | ||
6489 | if (!details) | |
6490 | return 0; | |
6491 | ||
6492 | if (!isempty(details->trigger_unit_name)) { | |
6493 | r = strv_extend(strv, "trigger_unit"); | |
6494 | if (r < 0) | |
6495 | return r; | |
6496 | ||
6497 | r = strv_extend(strv, details->trigger_unit_name); | |
6498 | if (r < 0) | |
6499 | return r; | |
6500 | } | |
6501 | ||
6502 | if (ACTIVATION_DETAILS_VTABLE(details)->append_env) { | |
6503 | r = ACTIVATION_DETAILS_VTABLE(details)->append_pair(details, strv); | |
6504 | if (r < 0) | |
6505 | return r; | |
6506 | } | |
6507 | ||
6508 | return r + !isempty(details->trigger_unit_name); /* Return the number of pairs added to the strv */ | |
6509 | } | |
6510 | ||
6511 | DEFINE_TRIVIAL_REF_UNREF_FUNC(ActivationDetails, activation_details, activation_details_free); |