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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 LP |
16 | #include "bus-common-errors.h" |
17 | #include "bus-util.h" | |
fdb3deca | 18 | #include "cgroup-setup.h" |
c6c18be3 | 19 | #include "cgroup-util.h" |
f4351959 | 20 | #include "chase-symlinks.h" |
e30bbc90 | 21 | #include "core-varlink.h" |
4f5dd394 LP |
22 | #include "dbus-unit.h" |
23 | #include "dbus.h" | |
24 | #include "dropin.h" | |
25 | #include "escape.h" | |
26 | #include "execute.h" | |
6a48d82f | 27 | #include "fd-util.h" |
a5c32cff | 28 | #include "fileio-label.h" |
ee228be1 | 29 | #include "fileio.h" |
f97b34a6 | 30 | #include "format-util.h" |
4b58153d | 31 | #include "id128-util.h" |
5cfa33e0 | 32 | #include "install.h" |
2d3b784d | 33 | #include "io-util.h" |
a3f5fd96 | 34 | #include "label.h" |
4f5dd394 LP |
35 | #include "load-dropin.h" |
36 | #include "load-fragment.h" | |
37 | #include "log.h" | |
38 | #include "macro.h" | |
f5947a5e | 39 | #include "missing_audit.h" |
4f5dd394 LP |
40 | #include "mkdir.h" |
41 | #include "path-util.h" | |
0b452006 | 42 | #include "process-util.h" |
810ef318 | 43 | #include "rm-rf.h" |
4f5dd394 | 44 | #include "set.h" |
6eb7c172 | 45 | #include "signal-util.h" |
d3070fbd | 46 | #include "sparse-endian.h" |
e9db43d5 | 47 | #include "special.h" |
2e59b241 | 48 | #include "specifier.h" |
8fcde012 | 49 | #include "stat-util.h" |
d054f0a4 | 50 | #include "stdio-util.h" |
5afe510c | 51 | #include "string-table.h" |
07630cea | 52 | #include "string-util.h" |
4f5dd394 | 53 | #include "strv.h" |
5b262f74 | 54 | #include "terminal-util.h" |
e4de7287 | 55 | #include "tmpfile-util.h" |
4f4afc88 | 56 | #include "umask-util.h" |
4f5dd394 | 57 | #include "unit-name.h" |
e9db43d5 | 58 | #include "unit.h" |
b1d4f8e1 LP |
59 | #include "user-util.h" |
60 | #include "virt.h" | |
91ce91c7 JK |
61 | #if BPF_FRAMEWORK |
62 | #include "bpf-link.h" | |
63 | #endif | |
87f0e418 | 64 | |
37109b85 ZJS |
65 | /* Thresholds for logging at INFO level about resource consumption */ |
66 | #define MENTIONWORTHY_CPU_NSEC (1 * NSEC_PER_SEC) | |
67 | #define MENTIONWORTHY_IO_BYTES (1024 * 1024ULL) | |
68 | #define MENTIONWORTHY_IP_BYTES (0ULL) | |
69 | ||
70 | /* Thresholds for logging at INFO level about resource consumption */ | |
71 | #define NOTICEWORTHY_CPU_NSEC (10*60 * NSEC_PER_SEC) /* 10 minutes */ | |
72 | #define NOTICEWORTHY_IO_BYTES (10 * 1024 * 1024ULL) /* 10 MB */ | |
73 | #define NOTICEWORTHY_IP_BYTES (128 * 1024 * 1024ULL) /* 128 MB */ | |
74 | ||
87f0e418 LP |
75 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { |
76 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 LP |
77 | [UNIT_SOCKET] = &socket_vtable, |
78 | [UNIT_TARGET] = &target_vtable, | |
79 | [UNIT_DEVICE] = &device_vtable, | |
80 | [UNIT_MOUNT] = &mount_vtable, | |
81 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 82 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 83 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 84 | [UNIT_PATH] = &path_vtable, |
6c12b52e | 85 | [UNIT_SLICE] = &slice_vtable, |
5afe510c | 86 | [UNIT_SCOPE] = &scope_vtable, |
87f0e418 LP |
87 | }; |
88 | ||
75db809a | 89 | Unit* unit_new(Manager *m, size_t size) { |
87f0e418 LP |
90 | Unit *u; |
91 | ||
92 | assert(m); | |
ac155bb8 | 93 | assert(size >= sizeof(Unit)); |
87f0e418 | 94 | |
7d17cfbc MS |
95 | u = malloc0(size); |
96 | if (!u) | |
87f0e418 LP |
97 | return NULL; |
98 | ||
ac155bb8 MS |
99 | u->manager = m; |
100 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
101 | u->default_dependencies = true; |
102 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 103 | u->unit_file_preset = -1; |
d420282b | 104 | u->on_failure_job_mode = JOB_REPLACE; |
294446dc | 105 | u->on_success_job_mode = JOB_FAIL; |
0bb814c2 | 106 | u->cgroup_control_inotify_wd = -1; |
afcfaa69 | 107 | u->cgroup_memory_inotify_wd = -1; |
36c16a7c | 108 | u->job_timeout = USEC_INFINITY; |
a2df3ea4 | 109 | u->job_running_timeout = USEC_INFINITY; |
00d9ef85 LP |
110 | u->ref_uid = UID_INVALID; |
111 | u->ref_gid = GID_INVALID; | |
fe700f46 | 112 | u->cpu_usage_last = NSEC_INFINITY; |
17f14955 | 113 | u->cgroup_invalidated_mask |= CGROUP_MASK_BPF_FIREWALL; |
7af67e9a | 114 | u->failure_action_exit_status = u->success_action_exit_status = -1; |
87f0e418 | 115 | |
6a48d82f DM |
116 | u->ip_accounting_ingress_map_fd = -1; |
117 | u->ip_accounting_egress_map_fd = -1; | |
0fd9c28c LP |
118 | for (CGroupIOAccountingMetric i = 0; i < _CGROUP_IO_ACCOUNTING_METRIC_MAX; i++) |
119 | u->io_accounting_last[i] = UINT64_MAX; | |
120 | ||
6a48d82f DM |
121 | u->ipv4_allow_map_fd = -1; |
122 | u->ipv6_allow_map_fd = -1; | |
123 | u->ipv4_deny_map_fd = -1; | |
124 | u->ipv6_deny_map_fd = -1; | |
125 | ||
2e59b241 LP |
126 | u->last_section_private = -1; |
127 | ||
7bf081a1 | 128 | u->start_ratelimit = (RateLimit) { m->default_start_limit_interval, m->default_start_limit_burst }; |
0bc488c9 | 129 | u->auto_start_stop_ratelimit = (RateLimit) { 10 * USEC_PER_SEC, 16 }; |
bea355da | 130 | |
87f0e418 LP |
131 | return u; |
132 | } | |
133 | ||
a581e45a | 134 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
dc409696 | 135 | _cleanup_(unit_freep) Unit *u = NULL; |
a581e45a LP |
136 | int r; |
137 | ||
138 | u = unit_new(m, size); | |
139 | if (!u) | |
140 | return -ENOMEM; | |
141 | ||
142 | r = unit_add_name(u, name); | |
dc409696 | 143 | if (r < 0) |
a581e45a | 144 | return r; |
a581e45a | 145 | |
1cc6c93a YW |
146 | *ret = TAKE_PTR(u); |
147 | ||
a581e45a LP |
148 | return r; |
149 | } | |
150 | ||
303ee601 | 151 | bool unit_has_name(const Unit *u, const char *name) { |
f278026d LP |
152 | assert(u); |
153 | assert(name); | |
154 | ||
4562c355 ZJS |
155 | return streq_ptr(name, u->id) || |
156 | set_contains(u->aliases, name); | |
f278026d LP |
157 | } |
158 | ||
598459ce LP |
159 | static void unit_init(Unit *u) { |
160 | CGroupContext *cc; | |
161 | ExecContext *ec; | |
162 | KillContext *kc; | |
163 | ||
164 | assert(u); | |
165 | assert(u->manager); | |
166 | assert(u->type >= 0); | |
167 | ||
168 | cc = unit_get_cgroup_context(u); | |
169 | if (cc) { | |
170 | cgroup_context_init(cc); | |
171 | ||
172 | /* Copy in the manager defaults into the cgroup | |
173 | * context, _before_ the rest of the settings have | |
174 | * been initialized */ | |
175 | ||
176 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
13c31542 | 177 | cc->io_accounting = u->manager->default_io_accounting; |
598459ce LP |
178 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
179 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 180 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
6a48d82f | 181 | cc->ip_accounting = u->manager->default_ip_accounting; |
0af20ea2 LP |
182 | |
183 | if (u->type != UNIT_SLICE) | |
184 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
185 | } |
186 | ||
187 | ec = unit_get_exec_context(u); | |
b1edf445 | 188 | if (ec) { |
598459ce LP |
189 | exec_context_init(ec); |
190 | ||
d4a402e4 LP |
191 | if (u->manager->default_oom_score_adjust_set) { |
192 | ec->oom_score_adjust = u->manager->default_oom_score_adjust; | |
193 | ec->oom_score_adjust_set = true; | |
194 | } | |
195 | ||
5e37d193 FB |
196 | if (MANAGER_IS_SYSTEM(u->manager)) |
197 | ec->keyring_mode = EXEC_KEYRING_SHARED; | |
198 | else { | |
199 | ec->keyring_mode = EXEC_KEYRING_INHERIT; | |
200 | ||
201 | /* User manager might have its umask redefined by PAM or UMask=. In this | |
202 | * case let the units it manages inherit this value by default. They can | |
203 | * still tune this value through their own unit file */ | |
204 | (void) get_process_umask(getpid_cached(), &ec->umask); | |
205 | } | |
b1edf445 LP |
206 | } |
207 | ||
598459ce LP |
208 | kc = unit_get_kill_context(u); |
209 | if (kc) | |
210 | kill_context_init(kc); | |
211 | ||
212 | if (UNIT_VTABLE(u)->init) | |
213 | UNIT_VTABLE(u)->init(u); | |
214 | } | |
215 | ||
4562c355 ZJS |
216 | static int unit_add_alias(Unit *u, char *donated_name) { |
217 | int r; | |
218 | ||
219 | /* Make sure that u->names is allocated. We may leave u->names | |
220 | * empty if we fail later, but this is not a problem. */ | |
973bc32a | 221 | r = set_ensure_put(&u->aliases, &string_hash_ops, donated_name); |
4562c355 ZJS |
222 | if (r < 0) |
223 | return r; | |
224 | assert(r > 0); | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
87f0e418 | 229 | int unit_add_name(Unit *u, const char *text) { |
4562c355 | 230 | _cleanup_free_ char *name = NULL, *instance = NULL; |
87f0e418 | 231 | UnitType t; |
87f0e418 LP |
232 | int r; |
233 | ||
234 | assert(u); | |
235 | assert(text); | |
236 | ||
7410616c | 237 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 238 | if (!u->instance) |
acd1987a WY |
239 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
240 | "instance is not set when adding name '%s': %m", text); | |
87f0e418 | 241 | |
4562c355 | 242 | r = unit_name_replace_instance(text, u->instance, &name); |
7410616c | 243 | if (r < 0) |
acd1987a WY |
244 | return log_unit_debug_errno(u, r, |
245 | "failed to build instance name from '%s': %m", text); | |
7410616c | 246 | } else { |
4562c355 ZJS |
247 | name = strdup(text); |
248 | if (!name) | |
7410616c LP |
249 | return -ENOMEM; |
250 | } | |
87f0e418 | 251 | |
4562c355 | 252 | if (unit_has_name(u, name)) |
7410616c | 253 | return 0; |
4562c355 ZJS |
254 | |
255 | if (hashmap_contains(u->manager->units, name)) | |
acd1987a | 256 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EEXIST), |
4562c355 | 257 | "unit already exist when adding name '%s': %m", name); |
7410616c | 258 | |
4562c355 | 259 | if (!unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) |
acd1987a | 260 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
4562c355 | 261 | "name '%s' is invalid: %m", name); |
e537352b | 262 | |
4562c355 | 263 | t = unit_name_to_type(name); |
7410616c | 264 | if (t < 0) |
acd1987a | 265 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
cd990847 | 266 | "failed to derive unit type from name '%s': %m", name); |
87f0e418 | 267 | |
598459ce | 268 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
acd1987a WY |
269 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
270 | "unit type is illegal: u->type(%d) and t(%d) for name '%s': %m", | |
4562c355 | 271 | u->type, t, name); |
87f0e418 | 272 | |
4562c355 | 273 | r = unit_name_to_instance(name, &instance); |
e48614c4 | 274 | if (r < 0) |
4562c355 | 275 | return log_unit_debug_errno(u, r, "failed to extract instance from name '%s': %m", name); |
87f0e418 | 276 | |
4562c355 ZJS |
277 | if (instance && !unit_type_may_template(t)) |
278 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), "templates are not allowed for name '%s': %m", name); | |
9e2f7c11 | 279 | |
d383acad ZJS |
280 | /* Ensure that this unit either has no instance, or that the instance matches. */ |
281 | if (u->type != _UNIT_TYPE_INVALID && !streq_ptr(u->instance, instance)) | |
acd1987a | 282 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
ada4b34e ZJS |
283 | "cannot add name %s, the instances don't match (\"%s\" != \"%s\").", |
284 | name, instance, u->instance); | |
9e2f7c11 | 285 | |
4562c355 | 286 | if (u->id && !unit_type_may_alias(t)) |
ada4b34e ZJS |
287 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EEXIST), |
288 | "cannot add name %s, aliases are not allowed for %s units.", | |
289 | name, unit_type_to_string(t)); | |
9e2f7c11 | 290 | |
598459ce | 291 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
ada4b34e | 292 | return log_unit_warning_errno(u, SYNTHETIC_ERRNO(E2BIG), "cannot add name, manager has too many units: %m"); |
4f0f902f | 293 | |
4562c355 ZJS |
294 | /* Add name to the global hashmap first, because that's easier to undo */ |
295 | r = hashmap_put(u->manager->units, name, u); | |
7410616c | 296 | if (r < 0) |
acd1987a | 297 | return log_unit_debug_errno(u, r, "add unit to hashmap failed for name '%s': %m", text); |
87f0e418 | 298 | |
4562c355 ZJS |
299 | if (u->id) { |
300 | r = unit_add_alias(u, name); /* unit_add_alias() takes ownership of the name on success */ | |
301 | if (r < 0) { | |
302 | hashmap_remove(u->manager->units, name); | |
303 | return r; | |
304 | } | |
305 | TAKE_PTR(name); | |
306 | ||
307 | } else { | |
308 | /* A new name, we don't need the set yet. */ | |
309 | assert(u->type == _UNIT_TYPE_INVALID); | |
310 | assert(!u->instance); | |
311 | ||
ac155bb8 | 312 | u->type = t; |
4562c355 ZJS |
313 | u->id = TAKE_PTR(name); |
314 | u->instance = TAKE_PTR(instance); | |
9e2f7c11 | 315 | |
71fda00f | 316 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
598459ce | 317 | unit_init(u); |
598459ce | 318 | } |
9e2f7c11 | 319 | |
598459ce LP |
320 | unit_add_to_dbus_queue(u); |
321 | return 0; | |
87f0e418 LP |
322 | } |
323 | ||
0ae97ec1 | 324 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 325 | _cleanup_free_ char *t = NULL; |
4562c355 | 326 | char *s; |
276c3e78 | 327 | int r; |
0ae97ec1 LP |
328 | |
329 | assert(u); | |
330 | assert(name); | |
331 | ||
7410616c | 332 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 333 | if (!u->instance) |
9e2f7c11 LP |
334 | return -EINVAL; |
335 | ||
7410616c LP |
336 | r = unit_name_replace_instance(name, u->instance, &t); |
337 | if (r < 0) | |
338 | return r; | |
9e2f7c11 LP |
339 | |
340 | name = t; | |
341 | } | |
342 | ||
4562c355 ZJS |
343 | if (streq_ptr(u->id, name)) |
344 | return 0; /* Nothing to do. */ | |
345 | ||
346 | /* Selects one of the aliases of this unit as the id */ | |
347 | s = set_get(u->aliases, (char*) name); | |
9e2f7c11 | 348 | if (!s) |
0ae97ec1 LP |
349 | return -ENOENT; |
350 | ||
4562c355 ZJS |
351 | if (u->id) { |
352 | r = set_remove_and_put(u->aliases, name, u->id); | |
353 | if (r < 0) | |
354 | return r; | |
355 | } else | |
356 | assert_se(set_remove(u->aliases, name)); /* see set_get() above… */ | |
276c3e78 | 357 | |
4562c355 | 358 | u->id = s; /* Old u->id is now stored in the set, and s is not stored anywhere */ |
c1e1601e | 359 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 360 | |
0ae97ec1 LP |
361 | return 0; |
362 | } | |
363 | ||
f50e0a01 | 364 | int unit_set_description(Unit *u, const char *description) { |
84b26d51 | 365 | int r; |
f50e0a01 LP |
366 | |
367 | assert(u); | |
368 | ||
84b26d51 LP |
369 | r = free_and_strdup(&u->description, empty_to_null(description)); |
370 | if (r < 0) | |
371 | return r; | |
372 | if (r > 0) | |
373 | unit_add_to_dbus_queue(u); | |
c1e1601e | 374 | |
f50e0a01 LP |
375 | return 0; |
376 | } | |
377 | ||
f2f725e5 | 378 | bool unit_may_gc(Unit *u) { |
a354329f | 379 | UnitActiveState state; |
e98b2fbb | 380 | int r; |
5afe510c | 381 | |
701cc384 LP |
382 | assert(u); |
383 | ||
f2f725e5 ZJS |
384 | /* Checks whether the unit is ready to be unloaded for garbage collection. |
385 | * Returns true when the unit may be collected, and false if there's some | |
2641f02e ZJS |
386 | * reason to keep it loaded. |
387 | * | |
388 | * References from other units are *not* checked here. Instead, this is done | |
389 | * in unit_gc_sweep(), but using markers to properly collect dependency loops. | |
390 | */ | |
5afe510c | 391 | |
a354329f | 392 | if (u->job) |
f2f725e5 | 393 | return false; |
701cc384 | 394 | |
a354329f | 395 | if (u->nop_job) |
f2f725e5 | 396 | return false; |
6c073082 | 397 | |
a354329f LP |
398 | state = unit_active_state(u); |
399 | ||
7eb2a8a1 | 400 | /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */ |
a354329f LP |
401 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && |
402 | UNIT_VTABLE(u)->release_resources) | |
7eb2a8a1 | 403 | UNIT_VTABLE(u)->release_resources(u); |
a354329f | 404 | |
f5869324 | 405 | if (u->perpetual) |
f2f725e5 | 406 | return false; |
9d576438 | 407 | |
05a98afd | 408 | if (sd_bus_track_count(u->bus_track) > 0) |
f2f725e5 | 409 | return false; |
05a98afd | 410 | |
5afe510c LP |
411 | /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */ |
412 | switch (u->collect_mode) { | |
413 | ||
414 | case COLLECT_INACTIVE: | |
415 | if (state != UNIT_INACTIVE) | |
f2f725e5 | 416 | return false; |
5afe510c LP |
417 | |
418 | break; | |
419 | ||
420 | case COLLECT_INACTIVE_OR_FAILED: | |
421 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
f2f725e5 | 422 | return false; |
5afe510c LP |
423 | |
424 | break; | |
425 | ||
426 | default: | |
04499a70 | 427 | assert_not_reached(); |
5afe510c LP |
428 | } |
429 | ||
e98b2fbb LP |
430 | if (u->cgroup_path) { |
431 | /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay | |
432 | * around. Units with active processes should never be collected. */ | |
433 | ||
434 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
435 | if (r < 0) | |
6178e2f8 | 436 | log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", empty_to_root(u->cgroup_path)); |
e98b2fbb | 437 | if (r <= 0) |
f2f725e5 | 438 | return false; |
e98b2fbb LP |
439 | } |
440 | ||
f2f725e5 ZJS |
441 | if (UNIT_VTABLE(u)->may_gc && !UNIT_VTABLE(u)->may_gc(u)) |
442 | return false; | |
701cc384 | 443 | |
f2f725e5 | 444 | return true; |
701cc384 LP |
445 | } |
446 | ||
87f0e418 LP |
447 | void unit_add_to_load_queue(Unit *u) { |
448 | assert(u); | |
ac155bb8 | 449 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 450 | |
ac155bb8 | 451 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
452 | return; |
453 | ||
71fda00f | 454 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 455 | u->in_load_queue = true; |
87f0e418 LP |
456 | } |
457 | ||
23a177ef LP |
458 | void unit_add_to_cleanup_queue(Unit *u) { |
459 | assert(u); | |
460 | ||
ac155bb8 | 461 | if (u->in_cleanup_queue) |
23a177ef LP |
462 | return; |
463 | ||
71fda00f | 464 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 465 | u->in_cleanup_queue = true; |
23a177ef LP |
466 | } |
467 | ||
701cc384 LP |
468 | void unit_add_to_gc_queue(Unit *u) { |
469 | assert(u); | |
470 | ||
ac155bb8 | 471 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
472 | return; |
473 | ||
f2f725e5 | 474 | if (!unit_may_gc(u)) |
701cc384 LP |
475 | return; |
476 | ||
c5a97ed1 | 477 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 478 | u->in_gc_queue = true; |
701cc384 LP |
479 | } |
480 | ||
c1e1601e LP |
481 | void unit_add_to_dbus_queue(Unit *u) { |
482 | assert(u); | |
ac155bb8 | 483 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 484 | |
ac155bb8 | 485 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
486 | return; |
487 | ||
a567261a | 488 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 489 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 490 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 491 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 492 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
493 | return; |
494 | } | |
495 | ||
71fda00f | 496 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 497 | u->in_dbus_queue = true; |
c1e1601e LP |
498 | } |
499 | ||
fda09318 | 500 | void unit_submit_to_stop_when_unneeded_queue(Unit *u) { |
a3c1168a LP |
501 | assert(u); |
502 | ||
503 | if (u->in_stop_when_unneeded_queue) | |
504 | return; | |
505 | ||
506 | if (!u->stop_when_unneeded) | |
507 | return; | |
508 | ||
509 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
510 | return; | |
511 | ||
512 | LIST_PREPEND(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
513 | u->in_stop_when_unneeded_queue = true; | |
514 | } | |
515 | ||
0bc488c9 LP |
516 | void unit_submit_to_start_when_upheld_queue(Unit *u) { |
517 | assert(u); | |
518 | ||
519 | if (u->in_start_when_upheld_queue) | |
520 | return; | |
521 | ||
522 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u))) | |
523 | return; | |
524 | ||
525 | if (!unit_has_dependency(u, UNIT_ATOM_START_STEADILY, NULL)) | |
526 | return; | |
527 | ||
528 | LIST_PREPEND(start_when_upheld_queue, u->manager->start_when_upheld_queue, u); | |
529 | u->in_start_when_upheld_queue = true; | |
530 | } | |
531 | ||
56c59592 LP |
532 | void unit_submit_to_stop_when_bound_queue(Unit *u) { |
533 | assert(u); | |
534 | ||
535 | if (u->in_stop_when_bound_queue) | |
536 | return; | |
537 | ||
538 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
539 | return; | |
540 | ||
541 | if (!unit_has_dependency(u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT, NULL)) | |
542 | return; | |
543 | ||
544 | LIST_PREPEND(stop_when_bound_queue, u->manager->stop_when_bound_queue, u); | |
545 | u->in_stop_when_bound_queue = true; | |
546 | } | |
547 | ||
15ed3c3a | 548 | static void unit_clear_dependencies(Unit *u) { |
87f0e418 LP |
549 | assert(u); |
550 | ||
15ed3c3a LP |
551 | /* Removes all dependencies configured on u and their reverse dependencies. */ |
552 | ||
553 | for (Hashmap *deps; (deps = hashmap_steal_first(u->dependencies));) { | |
87f0e418 | 554 | |
15ed3c3a LP |
555 | for (Unit *other; (other = hashmap_steal_first_key(deps));) { |
556 | Hashmap *other_deps; | |
701cc384 | 557 | |
15ed3c3a LP |
558 | HASHMAP_FOREACH(other_deps, other->dependencies) |
559 | hashmap_remove(other_deps, u); | |
560 | ||
561 | unit_add_to_gc_queue(other); | |
562 | } | |
563 | ||
564 | hashmap_free(deps); | |
87f0e418 LP |
565 | } |
566 | ||
15ed3c3a | 567 | u->dependencies = hashmap_free(u->dependencies); |
87f0e418 LP |
568 | } |
569 | ||
c2756a68 LP |
570 | static void unit_remove_transient(Unit *u) { |
571 | char **i; | |
572 | ||
573 | assert(u); | |
574 | ||
575 | if (!u->transient) | |
576 | return; | |
577 | ||
578 | if (u->fragment_path) | |
3f5e8115 | 579 | (void) unlink(u->fragment_path); |
c2756a68 LP |
580 | |
581 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 582 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 583 | |
39591351 LP |
584 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
585 | if (!p) | |
586 | continue; | |
587 | ||
588 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
589 | if (!pp) | |
590 | continue; | |
591 | ||
592 | /* Only drop transient drop-ins */ | |
593 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
594 | continue; | |
c2756a68 | 595 | |
39591351 LP |
596 | (void) unlink(*i); |
597 | (void) rmdir(p); | |
c2756a68 LP |
598 | } |
599 | } | |
600 | ||
a57f7e2c | 601 | static void unit_free_requires_mounts_for(Unit *u) { |
eef85c4a | 602 | assert(u); |
a57f7e2c | 603 | |
eef85c4a | 604 | for (;;) { |
c2b2df60 | 605 | _cleanup_free_ char *path = NULL; |
a57f7e2c | 606 | |
eef85c4a LP |
607 | path = hashmap_steal_first_key(u->requires_mounts_for); |
608 | if (!path) | |
609 | break; | |
610 | else { | |
611 | char s[strlen(path) + 1]; | |
a57f7e2c | 612 | |
eef85c4a LP |
613 | PATH_FOREACH_PREFIX_MORE(s, path) { |
614 | char *y; | |
615 | Set *x; | |
616 | ||
617 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
618 | if (!x) | |
619 | continue; | |
a57f7e2c | 620 | |
eef85c4a | 621 | (void) set_remove(x, u); |
a57f7e2c | 622 | |
eef85c4a LP |
623 | if (set_isempty(x)) { |
624 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
625 | free(y); | |
626 | set_free(x); | |
627 | } | |
a57f7e2c LP |
628 | } |
629 | } | |
630 | } | |
631 | ||
eef85c4a | 632 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
a57f7e2c LP |
633 | } |
634 | ||
598459ce LP |
635 | static void unit_done(Unit *u) { |
636 | ExecContext *ec; | |
637 | CGroupContext *cc; | |
638 | ||
639 | assert(u); | |
640 | ||
641 | if (u->type < 0) | |
642 | return; | |
643 | ||
644 | if (UNIT_VTABLE(u)->done) | |
645 | UNIT_VTABLE(u)->done(u); | |
646 | ||
647 | ec = unit_get_exec_context(u); | |
648 | if (ec) | |
649 | exec_context_done(ec); | |
650 | ||
651 | cc = unit_get_cgroup_context(u); | |
652 | if (cc) | |
653 | cgroup_context_done(cc); | |
654 | } | |
655 | ||
75db809a | 656 | Unit* unit_free(Unit *u) { |
12f64221 | 657 | Unit *slice; |
87f0e418 LP |
658 | char *t; |
659 | ||
c9d5c9c0 | 660 | if (!u) |
75db809a | 661 | return NULL; |
87f0e418 | 662 | |
50fb00b7 | 663 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 664 | |
2c289ea8 | 665 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
666 | unit_remove_transient(u); |
667 | ||
c1e1601e LP |
668 | bus_unit_send_removed_signal(u); |
669 | ||
598459ce | 670 | unit_done(u); |
a013b84b | 671 | |
50be4f4a | 672 | unit_dequeue_rewatch_pids(u); |
cf9fd508 | 673 | |
50be4f4a | 674 | sd_bus_slot_unref(u->match_bus_slot); |
05a98afd LP |
675 | sd_bus_track_unref(u->bus_track); |
676 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
d9e45bc3 | 677 | u->pending_freezer_message = sd_bus_message_unref(u->pending_freezer_message); |
05a98afd | 678 | |
a57f7e2c LP |
679 | unit_free_requires_mounts_for(u); |
680 | ||
90e74a66 | 681 | SET_FOREACH(t, u->aliases) |
ac155bb8 | 682 | hashmap_remove_value(u->manager->units, t, u); |
4562c355 ZJS |
683 | if (u->id) |
684 | hashmap_remove_value(u->manager->units, u->id, u); | |
87f0e418 | 685 | |
4b58153d LP |
686 | if (!sd_id128_is_null(u->invocation_id)) |
687 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
688 | ||
97e7d748 MS |
689 | if (u->job) { |
690 | Job *j = u->job; | |
691 | job_uninstall(j); | |
692 | job_free(j); | |
693 | } | |
964e0949 | 694 | |
e0209d83 MS |
695 | if (u->nop_job) { |
696 | Job *j = u->nop_job; | |
697 | job_uninstall(j); | |
698 | job_free(j); | |
699 | } | |
700 | ||
4c591f39 MK |
701 | /* A unit is being dropped from the tree, make sure our family is realized properly. Do this after we |
702 | * detach the unit from slice tree in order to eliminate its effect on controller masks. */ | |
12f64221 | 703 | slice = UNIT_GET_SLICE(u); |
d219a2b0 | 704 | unit_clear_dependencies(u); |
12f64221 LP |
705 | if (slice) |
706 | unit_add_family_to_cgroup_realize_queue(slice); | |
fb46fca7 | 707 | |
adefcf28 LP |
708 | if (u->on_console) |
709 | manager_unref_console(u->manager); | |
710 | ||
3d027d4d JK |
711 | |
712 | fdset_free(u->initial_socket_bind_link_fds); | |
91ce91c7 JK |
713 | #if BPF_FRAMEWORK |
714 | bpf_link_free(u->ipv4_socket_bind_link); | |
715 | bpf_link_free(u->ipv6_socket_bind_link); | |
716 | #endif | |
717 | ||
efdb0237 | 718 | unit_release_cgroup(u); |
72673e86 | 719 | |
d3070fbd LP |
720 | if (!MANAGER_IS_RELOADING(u->manager)) |
721 | unit_unlink_state_files(u); | |
722 | ||
00d9ef85 LP |
723 | unit_unref_uid_gid(u, false); |
724 | ||
5269eb6b | 725 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 726 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 727 | |
a911bb9a LP |
728 | unit_unwatch_all_pids(u); |
729 | ||
7f7d01ed ZJS |
730 | while (u->refs_by_target) |
731 | unit_ref_unset(u->refs_by_target); | |
57020a3a | 732 | |
ac155bb8 | 733 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 734 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 735 | |
ac155bb8 | 736 | if (u->in_load_queue) |
71fda00f | 737 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 738 | |
ac155bb8 | 739 | if (u->in_dbus_queue) |
71fda00f | 740 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 741 | |
13e72103 MK |
742 | if (u->in_cleanup_queue) |
743 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
744 | ||
a2d72e26 | 745 | if (u->in_gc_queue) |
c5a97ed1 | 746 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 747 | |
91a6073e LP |
748 | if (u->in_cgroup_realize_queue) |
749 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 750 | |
09e24654 LP |
751 | if (u->in_cgroup_empty_queue) |
752 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
753 | ||
13e72103 MK |
754 | if (u->in_cgroup_oom_queue) |
755 | LIST_REMOVE(cgroup_oom_queue, u->manager->cgroup_oom_queue, u); | |
adefcf28 | 756 | |
19496554 MS |
757 | if (u->in_target_deps_queue) |
758 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
759 | ||
a3c1168a LP |
760 | if (u->in_stop_when_unneeded_queue) |
761 | LIST_REMOVE(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
762 | ||
0bc488c9 LP |
763 | if (u->in_start_when_upheld_queue) |
764 | LIST_REMOVE(start_when_upheld_queue, u->manager->start_when_upheld_queue, u); | |
765 | ||
56c59592 LP |
766 | if (u->in_stop_when_bound_queue) |
767 | LIST_REMOVE(stop_when_bound_queue, u->manager->stop_when_bound_queue, u); | |
768 | ||
0fd9c28c | 769 | bpf_firewall_close(u); |
fab34748 | 770 | |
5f8ba20d JK |
771 | hashmap_free(u->bpf_foreign_by_key); |
772 | ||
76dc1725 | 773 | bpf_program_free(u->bpf_device_control_installed); |
084c7007 | 774 | |
6f50d4f7 MV |
775 | #if BPF_FRAMEWORK |
776 | bpf_link_free(u->restrict_ifaces_ingress_bpf_link); | |
777 | bpf_link_free(u->restrict_ifaces_egress_bpf_link); | |
778 | #endif | |
779 | fdset_free(u->initial_restric_ifaces_link_fds); | |
780 | ||
a946fa9b ZJS |
781 | condition_free_list(u->conditions); |
782 | condition_free_list(u->asserts); | |
f755e3b7 | 783 | |
ac155bb8 | 784 | free(u->description); |
49dbfa7b | 785 | strv_free(u->documentation); |
ac155bb8 | 786 | free(u->fragment_path); |
1b64d026 | 787 | free(u->source_path); |
ae7a7182 | 788 | strv_free(u->dropin_paths); |
ac155bb8 | 789 | free(u->instance); |
87f0e418 | 790 | |
f189ab18 | 791 | free(u->job_timeout_reboot_arg); |
6bf0f408 LP |
792 | free(u->reboot_arg); |
793 | ||
4562c355 ZJS |
794 | set_free_free(u->aliases); |
795 | free(u->id); | |
796 | ||
75db809a | 797 | return mfree(u); |
87f0e418 LP |
798 | } |
799 | ||
d9e45bc3 MS |
800 | FreezerState unit_freezer_state(Unit *u) { |
801 | assert(u); | |
802 | ||
803 | return u->freezer_state; | |
804 | } | |
805 | ||
806 | int unit_freezer_state_kernel(Unit *u, FreezerState *ret) { | |
807 | char *values[1] = {}; | |
808 | int r; | |
809 | ||
810 | assert(u); | |
811 | ||
812 | r = cg_get_keyed_attribute(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "cgroup.events", | |
813 | STRV_MAKE("frozen"), values); | |
814 | if (r < 0) | |
815 | return r; | |
816 | ||
817 | r = _FREEZER_STATE_INVALID; | |
818 | ||
819 | if (values[0]) { | |
820 | if (streq(values[0], "0")) | |
821 | r = FREEZER_RUNNING; | |
822 | else if (streq(values[0], "1")) | |
823 | r = FREEZER_FROZEN; | |
824 | } | |
825 | ||
826 | free(values[0]); | |
827 | *ret = r; | |
828 | ||
829 | return 0; | |
830 | } | |
831 | ||
87f0e418 LP |
832 | UnitActiveState unit_active_state(Unit *u) { |
833 | assert(u); | |
834 | ||
ac155bb8 | 835 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
836 | return unit_active_state(unit_follow_merge(u)); |
837 | ||
838 | /* After a reload it might happen that a unit is not correctly | |
839 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 840 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
841 | |
842 | return UNIT_VTABLE(u)->active_state(u); | |
843 | } | |
844 | ||
10a94420 LP |
845 | const char* unit_sub_state_to_string(Unit *u) { |
846 | assert(u); | |
847 | ||
848 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
849 | } | |
850 | ||
15ed3c3a | 851 | static int unit_merge_names(Unit *u, Unit *other) { |
4562c355 | 852 | char *name; |
7c0b05e5 | 853 | int r; |
87f0e418 | 854 | |
23a177ef LP |
855 | assert(u); |
856 | assert(other); | |
857 | ||
4562c355 | 858 | r = unit_add_alias(u, other->id); |
7c0b05e5 MS |
859 | if (r < 0) |
860 | return r; | |
23a177ef | 861 | |
4562c355 ZJS |
862 | r = set_move(u->aliases, other->aliases); |
863 | if (r < 0) { | |
864 | set_remove(u->aliases, other->id); | |
865 | return r; | |
866 | } | |
23a177ef | 867 | |
4562c355 ZJS |
868 | TAKE_PTR(other->id); |
869 | other->aliases = set_free_free(other->aliases); | |
23a177ef | 870 | |
90e74a66 | 871 | SET_FOREACH(name, u->aliases) |
4562c355 | 872 | assert_se(hashmap_replace(u->manager->units, name, u) == 0); |
7c0b05e5 MS |
873 | |
874 | return 0; | |
87f0e418 LP |
875 | } |
876 | ||
15ed3c3a LP |
877 | static int unit_reserve_dependencies(Unit *u, Unit *other) { |
878 | size_t n_reserve; | |
879 | Hashmap* deps; | |
880 | void *d; | |
881 | int r; | |
09a65f92 MS |
882 | |
883 | assert(u); | |
884 | assert(other); | |
09a65f92 | 885 | |
15ed3c3a LP |
886 | /* Let's reserve some space in the dependency hashmaps so that later on merging the units cannot |
887 | * fail. | |
888 | * | |
889 | * First make some room in the per dependency type hashmaps. Using the summed size of both unit's | |
890 | * hashmaps is an estimate that is likely too high since they probably use some of the same | |
891 | * types. But it's never too low, and that's all we need. */ | |
892 | ||
893 | n_reserve = MIN(hashmap_size(other->dependencies), LESS_BY((size_t) _UNIT_DEPENDENCY_MAX, hashmap_size(u->dependencies))); | |
894 | if (n_reserve > 0) { | |
895 | r = hashmap_ensure_allocated(&u->dependencies, NULL); | |
896 | if (r < 0) | |
897 | return r; | |
898 | ||
899 | r = hashmap_reserve(u->dependencies, n_reserve); | |
900 | if (r < 0) | |
901 | return r; | |
902 | } | |
903 | ||
904 | /* Now, enlarge our per dependency type hashmaps by the number of entries in the same hashmap of the | |
905 | * other unit's dependencies. | |
906 | * | |
907 | * NB: If u does not have a dependency set allocated for some dependency type, there is no need to | |
908 | * reserve anything for. In that case other's set will be transferred as a whole to u by | |
909 | * complete_move(). */ | |
910 | ||
911 | HASHMAP_FOREACH_KEY(deps, d, u->dependencies) { | |
912 | Hashmap *other_deps; | |
913 | ||
914 | other_deps = hashmap_get(other->dependencies, d); | |
915 | ||
916 | r = hashmap_reserve(deps, hashmap_size(other_deps)); | |
917 | if (r < 0) | |
918 | return r; | |
919 | } | |
920 | ||
921 | return 0; | |
922 | } | |
923 | ||
924 | static void unit_maybe_warn_about_dependency( | |
925 | Unit *u, | |
926 | const char *other_id, | |
927 | UnitDependency dependency) { | |
928 | ||
929 | assert(u); | |
930 | ||
931 | /* Only warn about some unit types */ | |
932 | if (!IN_SET(dependency, | |
933 | UNIT_CONFLICTS, | |
934 | UNIT_CONFLICTED_BY, | |
935 | UNIT_BEFORE, | |
936 | UNIT_AFTER, | |
294446dc | 937 | UNIT_ON_SUCCESS, |
15ed3c3a LP |
938 | UNIT_ON_FAILURE, |
939 | UNIT_TRIGGERS, | |
940 | UNIT_TRIGGERED_BY)) | |
941 | return; | |
942 | ||
943 | if (streq_ptr(u->id, other_id)) | |
944 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
945 | else | |
946 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other_id), u->id); | |
947 | } | |
948 | ||
949 | static int unit_per_dependency_type_hashmap_update( | |
950 | Hashmap *per_type, | |
951 | Unit *other, | |
952 | UnitDependencyMask origin_mask, | |
953 | UnitDependencyMask destination_mask) { | |
954 | ||
955 | UnitDependencyInfo info; | |
956 | int r; | |
957 | ||
958 | assert(other); | |
959 | assert_cc(sizeof(void*) == sizeof(info)); | |
960 | ||
961 | /* Acquire the UnitDependencyInfo entry for the Unit* we are interested in, and update it if it | |
962 | * exists, or insert it anew if not. */ | |
09a65f92 | 963 | |
15ed3c3a LP |
964 | info.data = hashmap_get(per_type, other); |
965 | if (info.data) { | |
966 | /* Entry already exists. Add in our mask. */ | |
967 | ||
968 | if (FLAGS_SET(origin_mask, info.origin_mask) && | |
969 | FLAGS_SET(destination_mask, info.destination_mask)) | |
970 | return 0; /* NOP */ | |
971 | ||
972 | info.origin_mask |= origin_mask; | |
973 | info.destination_mask |= destination_mask; | |
974 | ||
975 | r = hashmap_update(per_type, other, info.data); | |
976 | } else { | |
977 | info = (UnitDependencyInfo) { | |
978 | .origin_mask = origin_mask, | |
979 | .destination_mask = destination_mask, | |
980 | }; | |
09a65f92 | 981 | |
15ed3c3a LP |
982 | r = hashmap_put(per_type, other, info.data); |
983 | } | |
984 | if (r < 0) | |
985 | return r; | |
986 | ||
987 | ||
988 | return 1; | |
09a65f92 MS |
989 | } |
990 | ||
15ed3c3a LP |
991 | static int unit_add_dependency_hashmap( |
992 | Hashmap **dependencies, | |
993 | UnitDependency d, | |
994 | Unit *other, | |
995 | UnitDependencyMask origin_mask, | |
996 | UnitDependencyMask destination_mask) { | |
997 | ||
998 | Hashmap *per_type; | |
87f0e418 | 999 | int r; |
23a177ef | 1000 | |
15ed3c3a LP |
1001 | assert(dependencies); |
1002 | assert(other); | |
1003 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
1004 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
1005 | assert(origin_mask > 0 || destination_mask > 0); | |
1006 | ||
1007 | /* Ensure the top-level dependency hashmap exists that maps UnitDependency → Hashmap(Unit* → | |
1008 | * UnitDependencyInfo) */ | |
1009 | r = hashmap_ensure_allocated(dependencies, NULL); | |
1010 | if (r < 0) | |
1011 | return r; | |
1012 | ||
1013 | /* Acquire the inner hashmap, that maps Unit* → UnitDependencyInfo, for the specified dependency | |
1014 | * type, and if it's missing allocate it and insert it. */ | |
1015 | per_type = hashmap_get(*dependencies, UNIT_DEPENDENCY_TO_PTR(d)); | |
1016 | if (!per_type) { | |
1017 | per_type = hashmap_new(NULL); | |
1018 | if (!per_type) | |
1019 | return -ENOMEM; | |
1020 | ||
1021 | r = hashmap_put(*dependencies, UNIT_DEPENDENCY_TO_PTR(d), per_type); | |
1022 | if (r < 0) { | |
1023 | hashmap_free(per_type); | |
1024 | return r; | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | return unit_per_dependency_type_hashmap_update(per_type, other, origin_mask, destination_mask); | |
1029 | } | |
1030 | ||
1031 | static void unit_merge_dependencies( | |
1032 | Unit *u, | |
1033 | Unit *other) { | |
1034 | ||
1035 | int r; | |
eef85c4a | 1036 | |
23a177ef LP |
1037 | assert(u); |
1038 | assert(other); | |
23a177ef | 1039 | |
15ed3c3a LP |
1040 | if (u == other) |
1041 | return; | |
1042 | ||
1043 | for (;;) { | |
1044 | _cleanup_(hashmap_freep) Hashmap *other_deps = NULL; | |
1045 | UnitDependencyInfo di_back; | |
1046 | Unit *back; | |
1047 | void *dt; /* Actually of type UnitDependency, except that we don't bother casting it here, | |
1048 | * since the hashmaps all want it as void pointer. */ | |
1049 | ||
1050 | /* Let's focus on one dependency type at a time, that 'other' has defined. */ | |
1051 | other_deps = hashmap_steal_first_key_and_value(other->dependencies, &dt); | |
1052 | if (!other_deps) | |
1053 | break; /* done! */ | |
1054 | ||
1055 | /* Now iterate through all dependencies of this dependency type, of 'other'. We refer to the | |
1056 | * referenced units as 'back'. */ | |
1057 | HASHMAP_FOREACH_KEY(di_back.data, back, other_deps) { | |
1058 | Hashmap *back_deps; | |
1059 | void *back_dt; | |
eef85c4a | 1060 | |
e66047ff | 1061 | if (back == u) { |
15ed3c3a LP |
1062 | /* This is a dependency pointing back to the unit we want to merge with? |
1063 | * Suppress it (but warn) */ | |
1064 | unit_maybe_warn_about_dependency(u, other->id, UNIT_DEPENDENCY_FROM_PTR(dt)); | |
1065 | continue; | |
1066 | } | |
eef85c4a | 1067 | |
15ed3c3a LP |
1068 | /* Now iterate through all deps of 'back', and fix the ones pointing to 'other' to |
1069 | * point to 'u' instead. */ | |
1070 | HASHMAP_FOREACH_KEY(back_deps, back_dt, back->dependencies) { | |
1071 | UnitDependencyInfo di_move; | |
eef85c4a | 1072 | |
15ed3c3a LP |
1073 | di_move.data = hashmap_remove(back_deps, other); |
1074 | if (!di_move.data) | |
1075 | continue; | |
eef85c4a | 1076 | |
15ed3c3a LP |
1077 | assert_se(unit_per_dependency_type_hashmap_update( |
1078 | back_deps, | |
1079 | u, | |
1080 | di_move.origin_mask, | |
1081 | di_move.destination_mask) >= 0); | |
1082 | } | |
1083 | } | |
eef85c4a | 1084 | |
15ed3c3a LP |
1085 | /* Now all references towards 'other' of the current type 'dt' are corrected to point to |
1086 | * 'u'. Lets's now move the deps of type 'dt' from 'other' to 'u'. First, let's try to move | |
1087 | * them per type wholesale. */ | |
1088 | r = hashmap_put(u->dependencies, dt, other_deps); | |
1089 | if (r == -EEXIST) { | |
1090 | Hashmap *deps; | |
eef85c4a | 1091 | |
15ed3c3a | 1092 | /* The target unit already has dependencies of this type, let's then merge this individually. */ |
eef85c4a | 1093 | |
15ed3c3a LP |
1094 | assert_se(deps = hashmap_get(u->dependencies, dt)); |
1095 | ||
1096 | for (;;) { | |
1097 | UnitDependencyInfo di_move; | |
1098 | ||
1099 | /* Get first dep */ | |
1100 | di_move.data = hashmap_steal_first_key_and_value(other_deps, (void**) &back); | |
1101 | if (!di_move.data) | |
1102 | break; /* done */ | |
1103 | if (back == u) { | |
1104 | /* Would point back to us, ignore */ | |
1105 | unit_maybe_warn_about_dependency(u, other->id, UNIT_DEPENDENCY_FROM_PTR(dt)); | |
1106 | continue; | |
1107 | } | |
23a177ef | 1108 | |
15ed3c3a LP |
1109 | assert_se(unit_per_dependency_type_hashmap_update(deps, back, di_move.origin_mask, di_move.destination_mask) >= 0); |
1110 | } | |
1111 | } else { | |
1112 | assert_se(r >= 0); | |
1113 | TAKE_PTR(other_deps); | |
e66047ff | 1114 | |
15ed3c3a LP |
1115 | if (hashmap_remove(other_deps, u)) |
1116 | unit_maybe_warn_about_dependency(u, other->id, UNIT_DEPENDENCY_FROM_PTR(dt)); | |
1117 | } | |
1118 | } | |
23a177ef | 1119 | |
15ed3c3a | 1120 | other->dependencies = hashmap_free(other->dependencies); |
23a177ef LP |
1121 | } |
1122 | ||
1123 | int unit_merge(Unit *u, Unit *other) { | |
09a65f92 | 1124 | int r; |
87f0e418 LP |
1125 | |
1126 | assert(u); | |
1127 | assert(other); | |
ac155bb8 MS |
1128 | assert(u->manager == other->manager); |
1129 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 1130 | |
cc916967 LP |
1131 | other = unit_follow_merge(other); |
1132 | ||
23a177ef LP |
1133 | if (other == u) |
1134 | return 0; | |
1135 | ||
ac155bb8 | 1136 | if (u->type != other->type) |
9e2f7c11 LP |
1137 | return -EINVAL; |
1138 | ||
8a993b61 | 1139 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
1140 | return -EEXIST; |
1141 | ||
ec2ce0c5 | 1142 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 1143 | return -EEXIST; |
87f0e418 | 1144 | |
d383acad ZJS |
1145 | if (!streq_ptr(u->instance, other->instance)) |
1146 | return -EINVAL; | |
1147 | ||
ac155bb8 | 1148 | if (other->job) |
819e213f LP |
1149 | return -EEXIST; |
1150 | ||
e0209d83 MS |
1151 | if (other->nop_job) |
1152 | return -EEXIST; | |
1153 | ||
fdf20a31 | 1154 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
1155 | return -EEXIST; |
1156 | ||
15ed3c3a LP |
1157 | /* Make reservations to ensure merge_dependencies() won't fail. We don't rollback reservations if we |
1158 | * fail. We don't have a way to undo reservations. A reservation is not a leak. */ | |
1159 | r = unit_reserve_dependencies(u, other); | |
1160 | if (r < 0) | |
1161 | return r; | |
09a65f92 | 1162 | |
87f0e418 | 1163 | /* Merge names */ |
15ed3c3a | 1164 | r = unit_merge_names(u, other); |
7c0b05e5 MS |
1165 | if (r < 0) |
1166 | return r; | |
87f0e418 | 1167 | |
57020a3a | 1168 | /* Redirect all references */ |
7f7d01ed ZJS |
1169 | while (other->refs_by_target) |
1170 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
57020a3a | 1171 | |
87f0e418 | 1172 | /* Merge dependencies */ |
15ed3c3a | 1173 | unit_merge_dependencies(u, other); |
87f0e418 | 1174 | |
ac155bb8 MS |
1175 | other->load_state = UNIT_MERGED; |
1176 | other->merged_into = u; | |
23a177ef | 1177 | |
3616a49c LP |
1178 | /* If there is still some data attached to the other node, we |
1179 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 1180 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
1181 | if (UNIT_VTABLE(other)->done) |
1182 | UNIT_VTABLE(other)->done(other); | |
1183 | ||
1184 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
1185 | unit_add_to_cleanup_queue(other); |
1186 | ||
1187 | return 0; | |
1188 | } | |
1189 | ||
1190 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 1191 | _cleanup_free_ char *s = NULL; |
23a177ef | 1192 | Unit *other; |
9e2f7c11 | 1193 | int r; |
23a177ef | 1194 | |
e8630e69 ZJS |
1195 | /* Either add name to u, or if a unit with name already exists, merge it with u. |
1196 | * If name is a template, do the same for name@instance, where instance is u's instance. */ | |
1197 | ||
23a177ef LP |
1198 | assert(u); |
1199 | assert(name); | |
1200 | ||
7410616c | 1201 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 1202 | if (!u->instance) |
9e2f7c11 LP |
1203 | return -EINVAL; |
1204 | ||
7410616c LP |
1205 | r = unit_name_replace_instance(name, u->instance, &s); |
1206 | if (r < 0) | |
1207 | return r; | |
9e2f7c11 LP |
1208 | |
1209 | name = s; | |
1210 | } | |
1211 | ||
c2756a68 | 1212 | other = manager_get_unit(u->manager, name); |
7410616c LP |
1213 | if (other) |
1214 | return unit_merge(u, other); | |
23a177ef | 1215 | |
7410616c | 1216 | return unit_add_name(u, name); |
23a177ef LP |
1217 | } |
1218 | ||
1219 | Unit* unit_follow_merge(Unit *u) { | |
1220 | assert(u); | |
1221 | ||
ac155bb8 MS |
1222 | while (u->load_state == UNIT_MERGED) |
1223 | assert_se(u = u->merged_into); | |
23a177ef LP |
1224 | |
1225 | return u; | |
1226 | } | |
1227 | ||
1228 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
1229 | int r; | |
1230 | ||
1231 | assert(u); | |
1232 | assert(c); | |
1233 | ||
e1e74614 | 1234 | if (c->working_directory && !c->working_directory_missing_ok) { |
eef85c4a | 1235 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1236 | if (r < 0) |
1237 | return r; | |
1238 | } | |
1239 | ||
1240 | if (c->root_directory) { | |
eef85c4a | 1241 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1242 | if (r < 0) |
1243 | return r; | |
1244 | } | |
1245 | ||
915e6d16 | 1246 | if (c->root_image) { |
eef85c4a | 1247 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
1248 | if (r < 0) |
1249 | return r; | |
1250 | } | |
1251 | ||
12375b95 | 1252 | for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
1253 | if (!u->manager->prefix[dt]) |
1254 | continue; | |
1255 | ||
211a3d87 | 1256 | for (size_t i = 0; i < c->directories[dt].n_items; i++) { |
c2b2df60 | 1257 | _cleanup_free_ char *p = NULL; |
ada5e276 | 1258 | |
211a3d87 | 1259 | p = path_join(u->manager->prefix[dt], c->directories[dt].items[i].path); |
ada5e276 YW |
1260 | if (!p) |
1261 | return -ENOMEM; | |
1262 | ||
eef85c4a | 1263 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
1264 | if (r < 0) |
1265 | return r; | |
1266 | } | |
1267 | } | |
1268 | ||
463d0d15 | 1269 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
1270 | return 0; |
1271 | ||
f3b7a79b LP |
1272 | /* For the following three directory types we need write access, and /var/ is possibly on the root |
1273 | * fs. Hence order after systemd-remount-fs.service, to ensure things are writable. */ | |
211a3d87 LB |
1274 | if (c->directories[EXEC_DIRECTORY_STATE].n_items > 0 || |
1275 | c->directories[EXEC_DIRECTORY_CACHE].n_items > 0 || | |
1276 | c->directories[EXEC_DIRECTORY_LOGS].n_items > 0) { | |
f3b7a79b LP |
1277 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, true, UNIT_DEPENDENCY_FILE); |
1278 | if (r < 0) | |
1279 | return r; | |
1280 | } | |
1281 | ||
b46a529c | 1282 | if (c->private_tmp) { |
d71f0505 | 1283 | |
b2c7d1bb FB |
1284 | /* FIXME: for now we make a special case for /tmp and add a weak dependency on |
1285 | * tmp.mount so /tmp being masked is supported. However there's no reason to treat | |
1286 | * /tmp specifically and masking other mount units should be handled more | |
1287 | * gracefully too, see PR#16894. */ | |
1288 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "tmp.mount", true, UNIT_DEPENDENCY_FILE); | |
1289 | if (r < 0) | |
1290 | return r; | |
1291 | ||
1292 | r = unit_require_mounts_for(u, "/var/tmp", UNIT_DEPENDENCY_FILE); | |
1293 | if (r < 0) | |
1294 | return r; | |
b46a529c | 1295 | |
35d8c19a | 1296 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1297 | if (r < 0) |
1298 | return r; | |
1299 | } | |
1300 | ||
33b58dfb LP |
1301 | if (c->root_image) { |
1302 | /* We need to wait for /dev/loopX to appear when doing RootImage=, hence let's add an | |
1303 | * implicit dependency on udev */ | |
1304 | ||
1305 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_UDEVD_SERVICE, true, UNIT_DEPENDENCY_FILE); | |
1306 | if (r < 0) | |
1307 | return r; | |
1308 | } | |
1309 | ||
52c239d7 LB |
1310 | if (!IN_SET(c->std_output, |
1311 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1312 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
52c239d7 LB |
1313 | !IN_SET(c->std_error, |
1314 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1315 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
91dd5f7c | 1316 | !c->log_namespace) |
23a177ef LP |
1317 | return 0; |
1318 | ||
91dd5f7c LP |
1319 | /* If syslog or kernel logging is requested (or log namespacing is), make sure our own logging daemon |
1320 | * is run first. */ | |
1321 | ||
1322 | if (c->log_namespace) { | |
dc5437c7 | 1323 | _cleanup_free_ char *socket_unit = NULL, *varlink_socket_unit = NULL; |
23a177ef | 1324 | |
91dd5f7c LP |
1325 | r = unit_name_build_from_type("systemd-journald", c->log_namespace, UNIT_SOCKET, &socket_unit); |
1326 | if (r < 0) | |
1327 | return r; | |
1328 | ||
1329 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, socket_unit, true, UNIT_DEPENDENCY_FILE); | |
1330 | if (r < 0) | |
1331 | return r; | |
dc5437c7 LP |
1332 | |
1333 | r = unit_name_build_from_type("systemd-journald-varlink", c->log_namespace, UNIT_SOCKET, &varlink_socket_unit); | |
1334 | if (r < 0) | |
1335 | return r; | |
1336 | ||
1337 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, varlink_socket_unit, true, UNIT_DEPENDENCY_FILE); | |
1338 | if (r < 0) | |
1339 | return r; | |
91dd5f7c LP |
1340 | } else |
1341 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, true, UNIT_DEPENDENCY_FILE); | |
b46a529c LP |
1342 | if (r < 0) |
1343 | return r; | |
23a177ef | 1344 | |
87f0e418 LP |
1345 | return 0; |
1346 | } | |
1347 | ||
04d232d8 | 1348 | const char* unit_description(Unit *u) { |
87f0e418 LP |
1349 | assert(u); |
1350 | ||
ac155bb8 MS |
1351 | if (u->description) |
1352 | return u->description; | |
87f0e418 | 1353 | |
ac155bb8 | 1354 | return strna(u->id); |
87f0e418 LP |
1355 | } |
1356 | ||
e6a16a82 | 1357 | const char* unit_status_string(Unit *u, char **ret_combined_buffer) { |
2a8f53c6 | 1358 | assert(u); |
04d232d8 | 1359 | assert(u->id); |
2a8f53c6 | 1360 | |
04d232d8 ZJS |
1361 | /* Return u->id, u->description, or "{u->id} - {u->description}". |
1362 | * Versions with u->description are only used if it is set. | |
e6a16a82 ZJS |
1363 | * The last option is used if configured and the caller provided the 'ret_combined_buffer' |
1364 | * pointer. | |
1365 | * | |
1366 | * Note that *ret_combined_buffer may be set to NULL. */ | |
04d232d8 ZJS |
1367 | |
1368 | if (!u->description || | |
1369 | u->manager->status_unit_format == STATUS_UNIT_FORMAT_NAME || | |
e6a16a82 ZJS |
1370 | (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED && !ret_combined_buffer) || |
1371 | streq(u->description, u->id)) { | |
1372 | ||
1373 | if (ret_combined_buffer) | |
1374 | *ret_combined_buffer = NULL; | |
2a8f53c6 | 1375 | return u->id; |
e6a16a82 | 1376 | } |
2a8f53c6 | 1377 | |
e6a16a82 ZJS |
1378 | if (ret_combined_buffer) { |
1379 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED) { | |
1380 | *ret_combined_buffer = strjoin(u->id, " - ", u->description); | |
1381 | if (*ret_combined_buffer) | |
1382 | return *ret_combined_buffer; | |
1383 | log_oom(); /* Fall back to ->description */ | |
04d232d8 | 1384 | } else |
e6a16a82 | 1385 | *ret_combined_buffer = NULL; |
04d232d8 ZJS |
1386 | } |
1387 | ||
1388 | return u->description; | |
2a8f53c6 ZJS |
1389 | } |
1390 | ||
87f0e418 | 1391 | /* Common implementation for multiple backends */ |
c3620770 | 1392 | int unit_load_fragment_and_dropin(Unit *u, bool fragment_required) { |
23a177ef LP |
1393 | int r; |
1394 | ||
1395 | assert(u); | |
23a177ef | 1396 | |
e48614c4 | 1397 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1398 | r = unit_load_fragment(u); |
1399 | if (r < 0) | |
23a177ef LP |
1400 | return r; |
1401 | ||
c3620770 ZJS |
1402 | if (u->load_state == UNIT_STUB) { |
1403 | if (fragment_required) | |
1404 | return -ENOENT; | |
1405 | ||
1406 | u->load_state = UNIT_LOADED; | |
1407 | } | |
23a177ef | 1408 | |
9e4ea9cc ZJS |
1409 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1410 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1411 | * been loaded and which not, at least without doing complicated book-keeping, | |
1412 | * so let's always reread all drop-ins. */ | |
c9e06956 ZJS |
1413 | r = unit_load_dropin(unit_follow_merge(u)); |
1414 | if (r < 0) | |
1415 | return r; | |
1416 | ||
1417 | if (u->source_path) { | |
1418 | struct stat st; | |
1419 | ||
1420 | if (stat(u->source_path, &st) >= 0) | |
1421 | u->source_mtime = timespec_load(&st.st_mtim); | |
1422 | else | |
1423 | u->source_mtime = 0; | |
1424 | } | |
1425 | ||
1426 | return 0; | |
23a177ef LP |
1427 | } |
1428 | ||
19496554 MS |
1429 | void unit_add_to_target_deps_queue(Unit *u) { |
1430 | Manager *m = u->manager; | |
1431 | ||
1432 | assert(u); | |
1433 | ||
1434 | if (u->in_target_deps_queue) | |
1435 | return; | |
1436 | ||
1437 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1438 | u->in_target_deps_queue = true; | |
1439 | } | |
1440 | ||
bba34eed | 1441 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1442 | assert(u); |
1443 | assert(target); | |
1444 | ||
ac155bb8 | 1445 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1446 | return 0; |
1447 | ||
35b8ca3a | 1448 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1449 | * that loop check below is reliable */ |
ac155bb8 MS |
1450 | if (u->load_state != UNIT_LOADED || |
1451 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1452 | return 0; |
1453 | ||
21256a2b LP |
1454 | /* If either side wants no automatic dependencies, then let's |
1455 | * skip this */ | |
ac155bb8 MS |
1456 | if (!u->default_dependencies || |
1457 | !target->default_dependencies) | |
21256a2b LP |
1458 | return 0; |
1459 | ||
98bc2000 | 1460 | /* Don't create loops */ |
15ed3c3a | 1461 | if (unit_has_dependency(target, UNIT_ATOM_BEFORE, u)) |
98bc2000 LP |
1462 | return 0; |
1463 | ||
eef85c4a | 1464 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1465 | } |
1466 | ||
e954c9cf | 1467 | static int unit_add_slice_dependencies(Unit *u) { |
12f64221 | 1468 | Unit *slice; |
e954c9cf | 1469 | assert(u); |
b81884e7 | 1470 | |
35b7ff80 | 1471 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1472 | return 0; |
1473 | ||
eef85c4a LP |
1474 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1475 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1476 | relationship). */ | |
f6173cb9 | 1477 | UnitDependencyMask mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; |
eef85c4a | 1478 | |
12f64221 LP |
1479 | slice = UNIT_GET_SLICE(u); |
1480 | if (slice) | |
1481 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, slice, true, mask); | |
e954c9cf | 1482 | |
8c8da0e0 | 1483 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1484 | return 0; |
1485 | ||
5a724170 | 1486 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, true, mask); |
98bc2000 LP |
1487 | } |
1488 | ||
e954c9cf | 1489 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1490 | UnitDependencyInfo di; |
1491 | const char *path; | |
9588bc32 LP |
1492 | int r; |
1493 | ||
1494 | assert(u); | |
1495 | ||
90e74a66 | 1496 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for) { |
eef85c4a | 1497 | char prefix[strlen(path) + 1]; |
9588bc32 | 1498 | |
eef85c4a | 1499 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1500 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1501 | Unit *m; |
1502 | ||
c7c89abb | 1503 | r = unit_name_from_path(prefix, ".mount", &p); |
598a6a84 LP |
1504 | if (IN_SET(r, -EINVAL, -ENAMETOOLONG)) |
1505 | continue; /* If the path cannot be converted to a mount unit name, then it's | |
4076ad9d | 1506 | * not manageable as a unit by systemd, and hence we don't need a |
598a6a84 | 1507 | * dependency on it. Let's thus silently ignore the issue. */ |
9588bc32 LP |
1508 | if (r < 0) |
1509 | return r; | |
c7c89abb FB |
1510 | |
1511 | m = manager_get_unit(u->manager, p); | |
1512 | if (!m) { | |
598a6a84 LP |
1513 | /* Make sure to load the mount unit if it exists. If so the dependencies on |
1514 | * this unit will be added later during the loading of the mount unit. */ | |
c7c89abb | 1515 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); |
9588bc32 | 1516 | continue; |
c7c89abb | 1517 | } |
9588bc32 LP |
1518 | if (m == u) |
1519 | continue; | |
1520 | ||
1521 | if (m->load_state != UNIT_LOADED) | |
1522 | continue; | |
1523 | ||
eef85c4a | 1524 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1525 | if (r < 0) |
1526 | return r; | |
1527 | ||
1528 | if (m->fragment_path) { | |
eef85c4a | 1529 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1530 | if (r < 0) |
1531 | return r; | |
1532 | } | |
1533 | } | |
1534 | } | |
1535 | ||
1536 | return 0; | |
1537 | } | |
1538 | ||
a2db0225 AZ |
1539 | static int unit_add_oomd_dependencies(Unit *u) { |
1540 | CGroupContext *c; | |
1541 | bool wants_oomd; | |
1542 | int r; | |
1543 | ||
1544 | assert(u); | |
1545 | ||
1546 | if (!u->default_dependencies) | |
1547 | return 0; | |
1548 | ||
1549 | c = unit_get_cgroup_context(u); | |
1550 | if (!c) | |
1551 | return 0; | |
1552 | ||
1553 | wants_oomd = (c->moom_swap == MANAGED_OOM_KILL || c->moom_mem_pressure == MANAGED_OOM_KILL); | |
1554 | if (!wants_oomd) | |
1555 | return 0; | |
1556 | ||
1557 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "systemd-oomd.service", true, UNIT_DEPENDENCY_FILE); | |
1558 | if (r < 0) | |
1559 | return r; | |
1560 | ||
1561 | return 0; | |
1562 | } | |
1563 | ||
95ae05c0 | 1564 | static int unit_add_startup_units(Unit *u) { |
9dfb6a3a | 1565 | if (!unit_has_startup_cgroup_constraints(u)) |
db785129 LP |
1566 | return 0; |
1567 | ||
de7fef4b | 1568 | return set_ensure_put(&u->manager->startup_units, NULL, u); |
95ae05c0 WC |
1569 | } |
1570 | ||
294446dc LP |
1571 | static int unit_validate_on_failure_job_mode( |
1572 | Unit *u, | |
1573 | const char *job_mode_setting, | |
1574 | JobMode job_mode, | |
1575 | const char *dependency_name, | |
1576 | UnitDependencyAtom atom) { | |
1577 | ||
1578 | Unit *other, *found = NULL; | |
1579 | ||
1580 | if (job_mode != JOB_ISOLATE) | |
1581 | return 0; | |
1582 | ||
1583 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
1584 | if (!found) | |
1585 | found = other; | |
1586 | else if (found != other) | |
1587 | return log_unit_error_errno( | |
1588 | u, SYNTHETIC_ERRNO(ENOEXEC), | |
1589 | "More than one %s dependencies specified but %sisolate set. Refusing.", | |
1590 | dependency_name, job_mode_setting); | |
1591 | } | |
1592 | ||
1593 | return 0; | |
1594 | } | |
1595 | ||
87f0e418 LP |
1596 | int unit_load(Unit *u) { |
1597 | int r; | |
1598 | ||
1599 | assert(u); | |
1600 | ||
ac155bb8 | 1601 | if (u->in_load_queue) { |
71fda00f | 1602 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1603 | u->in_load_queue = false; |
87f0e418 LP |
1604 | } |
1605 | ||
ac155bb8 | 1606 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1607 | return -EINVAL; |
1608 | ||
ac155bb8 | 1609 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1610 | return 0; |
1611 | ||
4f4afc88 | 1612 | if (u->transient_file) { |
66fa4bdd LP |
1613 | /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup |
1614 | * is complete, hence let's synchronize the unit file we just wrote to disk. */ | |
1615 | ||
4f4afc88 LP |
1616 | r = fflush_and_check(u->transient_file); |
1617 | if (r < 0) | |
1618 | goto fail; | |
1619 | ||
50fb00b7 | 1620 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1621 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1622 | } |
1623 | ||
c3784a7d ZJS |
1624 | r = UNIT_VTABLE(u)->load(u); |
1625 | if (r < 0) | |
23a177ef | 1626 | goto fail; |
c3784a7d ZJS |
1627 | |
1628 | assert(u->load_state != UNIT_STUB); | |
23a177ef | 1629 | |
7c8fa05c | 1630 | if (u->load_state == UNIT_LOADED) { |
19496554 | 1631 | unit_add_to_target_deps_queue(u); |
e954c9cf LP |
1632 | |
1633 | r = unit_add_slice_dependencies(u); | |
1634 | if (r < 0) | |
1635 | goto fail; | |
c2756a68 | 1636 | |
e954c9cf | 1637 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1638 | if (r < 0) |
c2756a68 | 1639 | goto fail; |
7c8fa05c | 1640 | |
a2db0225 AZ |
1641 | r = unit_add_oomd_dependencies(u); |
1642 | if (r < 0) | |
1643 | goto fail; | |
1644 | ||
95ae05c0 WC |
1645 | r = unit_add_startup_units(u); |
1646 | if (r < 0) | |
1647 | goto fail; | |
1648 | ||
294446dc LP |
1649 | r = unit_validate_on_failure_job_mode(u, "OnSuccessJobMode=", u->on_success_job_mode, "OnSuccess=", UNIT_ATOM_ON_SUCCESS); |
1650 | if (r < 0) | |
1651 | goto fail; | |
15ed3c3a | 1652 | |
294446dc LP |
1653 | r = unit_validate_on_failure_job_mode(u, "OnFailureJobMode=", u->on_failure_job_mode, "OnFailure=", UNIT_ATOM_ON_FAILURE); |
1654 | if (r < 0) | |
1655 | goto fail; | |
bc432dc7 | 1656 | |
a2df3ea4 MK |
1657 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1658 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1659 | ||
5af88058 LP |
1660 | /* We finished loading, let's ensure our parents recalculate the members mask */ |
1661 | unit_invalidate_cgroup_members_masks(u); | |
f68319bb LP |
1662 | } |
1663 | ||
ac155bb8 | 1664 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1665 | |
1666 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1667 | unit_add_to_gc_queue(u); |
f561e8c6 | 1668 | (void) manager_varlink_send_managed_oom_update(u); |
87f0e418 | 1669 | |
87f0e418 LP |
1670 | return 0; |
1671 | ||
1672 | fail: | |
81be2388 ZJS |
1673 | /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code |
1674 | * should hence return ENOEXEC to ensure units are placed in this state after loading. */ | |
c4555ad8 LP |
1675 | |
1676 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : | |
1677 | r == -ENOEXEC ? UNIT_BAD_SETTING : | |
1678 | UNIT_ERROR; | |
ac155bb8 | 1679 | u->load_error = r; |
c4555ad8 | 1680 | |
c149d2b4 ZJS |
1681 | /* Record the timestamp on the cache, so that if the cache gets updated between now and the next time |
1682 | * an attempt is made to load this unit, we know we need to check again. */ | |
7233e91a | 1683 | if (u->load_state == UNIT_NOT_FOUND) |
c2911d48 | 1684 | u->fragment_not_found_timestamp_hash = u->manager->unit_cache_timestamp_hash; |
7233e91a | 1685 | |
c1e1601e | 1686 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1687 | unit_add_to_gc_queue(u); |
23a177ef | 1688 | |
c4555ad8 | 1689 | return log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
87f0e418 LP |
1690 | } |
1691 | ||
f9f88198 YW |
1692 | _printf_(7, 8) |
1693 | static int log_unit_internal(void *userdata, int level, int error, const char *file, int line, const char *func, const char *format, ...) { | |
1694 | Unit *u = userdata; | |
1695 | va_list ap; | |
1696 | int r; | |
49365733 | 1697 | |
c2503e35 RH |
1698 | if (u && !unit_log_level_test(u, level)) |
1699 | return -ERRNO_VALUE(error); | |
1700 | ||
f9f88198 YW |
1701 | va_start(ap, format); |
1702 | if (u) | |
1703 | r = log_object_internalv(level, error, file, line, func, | |
1704 | u->manager->unit_log_field, | |
1705 | u->id, | |
1706 | u->manager->invocation_log_field, | |
1707 | u->invocation_id_string, | |
1708 | format, ap); | |
1709 | else | |
1710 | r = log_internalv(level, error, file, line, func, format, ap); | |
1711 | va_end(ap); | |
49365733 | 1712 | |
f9f88198 | 1713 | return r; |
49365733 LP |
1714 | } |
1715 | ||
97a3f4ee | 1716 | static bool unit_test_condition(Unit *u) { |
a0b191b7 LP |
1717 | _cleanup_strv_free_ char **env = NULL; |
1718 | int r; | |
1719 | ||
90bbc946 LP |
1720 | assert(u); |
1721 | ||
ac155bb8 | 1722 | dual_timestamp_get(&u->condition_timestamp); |
90bbc946 | 1723 | |
a0b191b7 LP |
1724 | r = manager_get_effective_environment(u->manager, &env); |
1725 | if (r < 0) { | |
1726 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
d52cc0a5 | 1727 | u->condition_result = true; |
a0b191b7 LP |
1728 | } else |
1729 | u->condition_result = condition_test_list( | |
1730 | u->conditions, | |
1731 | env, | |
1732 | condition_type_to_string, | |
1733 | log_unit_internal, | |
1734 | u); | |
e18f8852 | 1735 | |
a0b191b7 | 1736 | unit_add_to_dbus_queue(u); |
ac155bb8 | 1737 | return u->condition_result; |
90bbc946 LP |
1738 | } |
1739 | ||
97a3f4ee | 1740 | static bool unit_test_assert(Unit *u) { |
a0b191b7 LP |
1741 | _cleanup_strv_free_ char **env = NULL; |
1742 | int r; | |
1743 | ||
59fccdc5 LP |
1744 | assert(u); |
1745 | ||
1746 | dual_timestamp_get(&u->assert_timestamp); | |
59fccdc5 | 1747 | |
a0b191b7 LP |
1748 | r = manager_get_effective_environment(u->manager, &env); |
1749 | if (r < 0) { | |
1750 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
1751 | u->assert_result = CONDITION_ERROR; | |
1752 | } else | |
1753 | u->assert_result = condition_test_list( | |
1754 | u->asserts, | |
1755 | env, | |
1756 | assert_type_to_string, | |
1757 | log_unit_internal, | |
1758 | u); | |
e18f8852 | 1759 | |
a0b191b7 | 1760 | unit_add_to_dbus_queue(u); |
59fccdc5 LP |
1761 | return u->assert_result; |
1762 | } | |
1763 | ||
04d232d8 ZJS |
1764 | void unit_status_printf(Unit *u, StatusType status_type, const char *status, const char *format, const char *ident) { |
1765 | if (log_get_show_color()) { | |
1766 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED && strchr(ident, ' ')) | |
1767 | ident = strjoina(ANSI_HIGHLIGHT, u->id, ANSI_NORMAL, " - ", u->description); | |
1768 | else | |
1769 | ident = strjoina(ANSI_HIGHLIGHT, ident, ANSI_NORMAL); | |
1770 | } | |
5b262f74 | 1771 | |
df446f96 | 1772 | DISABLE_WARNING_FORMAT_NONLITERAL; |
04d232d8 | 1773 | manager_status_printf(u->manager, status_type, status, format, ident); |
df446f96 LP |
1774 | REENABLE_WARNING; |
1775 | } | |
1776 | ||
97a3f4ee | 1777 | int unit_test_start_limit(Unit *u) { |
429926e9 TR |
1778 | const char *reason; |
1779 | ||
6bf0f408 LP |
1780 | assert(u); |
1781 | ||
7bf081a1 | 1782 | if (ratelimit_below(&u->start_ratelimit)) { |
6bf0f408 LP |
1783 | u->start_limit_hit = false; |
1784 | return 0; | |
1785 | } | |
1786 | ||
1787 | log_unit_warning(u, "Start request repeated too quickly."); | |
1788 | u->start_limit_hit = true; | |
1789 | ||
429926e9 TR |
1790 | reason = strjoina("unit ", u->id, " failed"); |
1791 | ||
36c4dc08 LP |
1792 | emergency_action(u->manager, u->start_limit_action, |
1793 | EMERGENCY_ACTION_IS_WATCHDOG|EMERGENCY_ACTION_WARN, | |
1794 | u->reboot_arg, -1, reason); | |
1795 | ||
1796 | return -ECANCELED; | |
6bf0f408 LP |
1797 | } |
1798 | ||
c891efaf | 1799 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1800 | assert(u); |
c891efaf FB |
1801 | |
1802 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1803 | return false; | |
1804 | ||
1805 | /* For some reasons units remaining in the same process group | |
1806 | * as PID 1 fail to acquire the console even if it's not used | |
1807 | * by any process. So skip the confirmation question for them. */ | |
1808 | return !unit_get_exec_context(u)->same_pgrp; | |
1809 | } | |
1810 | ||
631b676b LP |
1811 | static bool unit_verify_deps(Unit *u) { |
1812 | Unit *other; | |
631b676b LP |
1813 | |
1814 | assert(u); | |
1815 | ||
defe63b0 LP |
1816 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined |
1817 | * with After=. We do not check Requires= or Requisite= here as they only should have an effect on | |
1818 | * the job processing, but do not have any effect afterwards. We don't check BindsTo= dependencies | |
1819 | * that are not used in conjunction with After= as for them any such check would make things entirely | |
1820 | * racy. */ | |
631b676b | 1821 | |
15ed3c3a | 1822 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { |
631b676b | 1823 | |
15ed3c3a | 1824 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other)) |
631b676b LP |
1825 | continue; |
1826 | ||
1827 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1828 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1829 | return false; | |
1830 | } | |
1831 | } | |
1832 | ||
1833 | return true; | |
1834 | } | |
1835 | ||
9adb6959 | 1836 | /* Errors that aren't really errors: |
6bf0f408 | 1837 | * -EALREADY: Unit is already started. |
9adb6959 | 1838 | * -ECOMM: Condition failed |
6bf0f408 | 1839 | * -EAGAIN: An operation is already in progress. Retry later. |
9adb6959 LP |
1840 | * |
1841 | * Errors that are real errors: | |
1842 | * -EBADR: This unit type does not support starting. | |
2de9b979 | 1843 | * -ECANCELED: Start limit hit, too many requests for now |
6bf0f408 LP |
1844 | * -EPROTO: Assert failed |
1845 | * -EINVAL: Unit not loaded | |
1846 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1847 | * -ENOLINK: The necessary dependencies are not fulfilled. |
d4fd1cf2 | 1848 | * -ESTALE: This unit has been started before and can't be started a second time |
a4191c9f | 1849 | * -ENOENT: This is a triggering unit and unit to trigger is not loaded |
87f0e418 LP |
1850 | */ |
1851 | int unit_start(Unit *u) { | |
1852 | UnitActiveState state; | |
92ab323c | 1853 | Unit *following; |
87f0e418 LP |
1854 | |
1855 | assert(u); | |
1856 | ||
9727f242 DDM |
1857 | /* Check start rate limiting early so that failure conditions don't cause us to enter a busy loop. */ |
1858 | if (UNIT_VTABLE(u)->test_start_limit) { | |
1859 | int r = UNIT_VTABLE(u)->test_start_limit(u); | |
1860 | if (r < 0) | |
1861 | return r; | |
1862 | } | |
1863 | ||
5766aca8 LP |
1864 | /* If this is already started, then this will succeed. Note that this will even succeed if this unit |
1865 | * is not startable by the user. This is relied on to detect when we need to wait for units and when | |
1866 | * waiting is finished. */ | |
87f0e418 LP |
1867 | state = unit_active_state(u); |
1868 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1869 | return -EALREADY; | |
380dc8b0 LP |
1870 | if (state == UNIT_MAINTENANCE) |
1871 | return -EAGAIN; | |
87f0e418 | 1872 | |
6bf0f408 LP |
1873 | /* Units that aren't loaded cannot be started */ |
1874 | if (u->load_state != UNIT_LOADED) | |
1875 | return -EINVAL; | |
1876 | ||
d4fd1cf2 LP |
1877 | /* Refuse starting scope units more than once */ |
1878 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1879 | return -ESTALE; | |
1880 | ||
5766aca8 LP |
1881 | /* If the conditions failed, don't do anything at all. If we already are activating this call might |
1882 | * still be useful to speed up activation in case there is some hold-off time, but we don't want to | |
1883 | * recheck the condition in that case. */ | |
a82e5507 | 1884 | if (state != UNIT_ACTIVATING && |
5af6aa58 | 1885 | !unit_test_condition(u)) |
5766aca8 | 1886 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(ECOMM), "Starting requested but condition failed. Not starting unit."); |
52661efd | 1887 | |
59fccdc5 LP |
1888 | /* If the asserts failed, fail the entire job */ |
1889 | if (state != UNIT_ACTIVATING && | |
5766aca8 LP |
1890 | !unit_test_assert(u)) |
1891 | return log_unit_notice_errno(u, SYNTHETIC_ERRNO(EPROTO), "Starting requested but asserts failed."); | |
59fccdc5 | 1892 | |
5766aca8 LP |
1893 | /* Units of types that aren't supported cannot be started. Note that we do this test only after the |
1894 | * condition checks, so that we rather return condition check errors (which are usually not | |
1895 | * considered a true failure) than "not supported" errors (which are considered a failure). | |
d11a7645 | 1896 | */ |
96cf3ec9 | 1897 | if (!unit_type_supported(u->type)) |
d11a7645 LP |
1898 | return -EOPNOTSUPP; |
1899 | ||
5766aca8 LP |
1900 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine |
1901 | * should have taken care of this already, but let's check this here again. After all, our | |
1902 | * dependencies might not be in effect anymore, due to a reload or due to a failed condition. */ | |
631b676b LP |
1903 | if (!unit_verify_deps(u)) |
1904 | return -ENOLINK; | |
1905 | ||
92ab323c | 1906 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1907 | following = unit_following(u); |
1908 | if (following) { | |
f2341e0a | 1909 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1910 | return unit_start(following); |
1911 | } | |
1912 | ||
1913 | /* If it is stopped, but we cannot start it, then fail */ | |
1914 | if (!UNIT_VTABLE(u)->start) | |
1915 | return -EBADR; | |
1916 | ||
5766aca8 LP |
1917 | /* We don't suppress calls to ->start() here when we are already starting, to allow this request to |
1918 | * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it | |
1919 | * waits for a holdoff timer to elapse before it will start again. */ | |
87f0e418 | 1920 | |
c1e1601e | 1921 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 1922 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 1923 | |
d1a34ae9 | 1924 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1925 | } |
1926 | ||
1927 | bool unit_can_start(Unit *u) { | |
1928 | assert(u); | |
1929 | ||
8ff4d2ab LP |
1930 | if (u->load_state != UNIT_LOADED) |
1931 | return false; | |
1932 | ||
96cf3ec9 | 1933 | if (!unit_type_supported(u->type)) |
8ff4d2ab LP |
1934 | return false; |
1935 | ||
d4fd1cf2 LP |
1936 | /* Scope units may be started only once */ |
1937 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
1938 | return false; | |
1939 | ||
87f0e418 LP |
1940 | return !!UNIT_VTABLE(u)->start; |
1941 | } | |
1942 | ||
2528a7a6 LP |
1943 | bool unit_can_isolate(Unit *u) { |
1944 | assert(u); | |
1945 | ||
1946 | return unit_can_start(u) && | |
ac155bb8 | 1947 | u->allow_isolate; |
2528a7a6 LP |
1948 | } |
1949 | ||
87f0e418 LP |
1950 | /* Errors: |
1951 | * -EBADR: This unit type does not support stopping. | |
1952 | * -EALREADY: Unit is already stopped. | |
1953 | * -EAGAIN: An operation is already in progress. Retry later. | |
1954 | */ | |
1955 | int unit_stop(Unit *u) { | |
1956 | UnitActiveState state; | |
92ab323c | 1957 | Unit *following; |
87f0e418 LP |
1958 | |
1959 | assert(u); | |
1960 | ||
87f0e418 | 1961 | state = unit_active_state(u); |
fdf20a31 | 1962 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1963 | return -EALREADY; |
1964 | ||
0faacd47 LP |
1965 | following = unit_following(u); |
1966 | if (following) { | |
f2341e0a | 1967 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1968 | return unit_stop(following); |
1969 | } | |
1970 | ||
7898b0cf LP |
1971 | if (!UNIT_VTABLE(u)->stop) |
1972 | return -EBADR; | |
1973 | ||
c1e1601e | 1974 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 1975 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 1976 | |
d1a34ae9 | 1977 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1978 | } |
1979 | ||
f5869324 LP |
1980 | bool unit_can_stop(Unit *u) { |
1981 | assert(u); | |
1982 | ||
39c79477 ZJS |
1983 | /* Note: if we return true here, it does not mean that the unit may be successfully stopped. |
1984 | * Extrinsic units follow external state and they may stop following external state changes | |
1985 | * (hence we return true here), but an attempt to do this through the manager will fail. */ | |
1986 | ||
96cf3ec9 | 1987 | if (!unit_type_supported(u->type)) |
f5869324 LP |
1988 | return false; |
1989 | ||
1990 | if (u->perpetual) | |
1991 | return false; | |
1992 | ||
1993 | return !!UNIT_VTABLE(u)->stop; | |
1994 | } | |
1995 | ||
87f0e418 LP |
1996 | /* Errors: |
1997 | * -EBADR: This unit type does not support reloading. | |
1998 | * -ENOEXEC: Unit is not started. | |
1999 | * -EAGAIN: An operation is already in progress. Retry later. | |
2000 | */ | |
2001 | int unit_reload(Unit *u) { | |
2002 | UnitActiveState state; | |
92ab323c | 2003 | Unit *following; |
87f0e418 LP |
2004 | |
2005 | assert(u); | |
2006 | ||
ac155bb8 | 2007 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
2008 | return -EINVAL; |
2009 | ||
87f0e418 LP |
2010 | if (!unit_can_reload(u)) |
2011 | return -EBADR; | |
2012 | ||
2013 | state = unit_active_state(u); | |
e364ad06 | 2014 | if (state == UNIT_RELOADING) |
6255af75 | 2015 | return -EAGAIN; |
87f0e418 | 2016 | |
d85ff944 YW |
2017 | if (state != UNIT_ACTIVE) |
2018 | return log_unit_warning_errno(u, SYNTHETIC_ERRNO(ENOEXEC), "Unit cannot be reloaded because it is inactive."); | |
87f0e418 | 2019 | |
e48614c4 ZJS |
2020 | following = unit_following(u); |
2021 | if (following) { | |
f2341e0a | 2022 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
2023 | return unit_reload(following); |
2024 | } | |
2025 | ||
c1e1601e | 2026 | unit_add_to_dbus_queue(u); |
82a2b6bb | 2027 | |
f54bcca5 JR |
2028 | if (!UNIT_VTABLE(u)->reload) { |
2029 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
2ad2e41a | 2030 | unit_notify(u, unit_active_state(u), unit_active_state(u), 0); |
f54bcca5 JR |
2031 | return 0; |
2032 | } | |
2033 | ||
d9e45bc3 MS |
2034 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
2035 | ||
d1a34ae9 | 2036 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
2037 | } |
2038 | ||
2039 | bool unit_can_reload(Unit *u) { | |
2040 | assert(u); | |
2041 | ||
f54bcca5 JR |
2042 | if (UNIT_VTABLE(u)->can_reload) |
2043 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 2044 | |
15ed3c3a | 2045 | if (unit_has_dependency(u, UNIT_ATOM_PROPAGATES_RELOAD_TO, NULL)) |
87f0e418 LP |
2046 | return true; |
2047 | ||
f54bcca5 | 2048 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
2049 | } |
2050 | ||
a3c1168a | 2051 | bool unit_is_unneeded(Unit *u) { |
15ed3c3a | 2052 | Unit *other; |
f3bff0eb LP |
2053 | assert(u); |
2054 | ||
ac155bb8 | 2055 | if (!u->stop_when_unneeded) |
a3c1168a | 2056 | return false; |
f3bff0eb | 2057 | |
a3c1168a | 2058 | /* Don't clean up while the unit is transitioning or is even inactive. */ |
116654d2 | 2059 | if (unit_active_state(u) != UNIT_ACTIVE) |
a3c1168a LP |
2060 | return false; |
2061 | if (u->job) | |
2062 | return false; | |
f3bff0eb | 2063 | |
15ed3c3a | 2064 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_PINS_STOP_WHEN_UNNEEDED) { |
fda09318 | 2065 | /* If a dependent unit has a job queued, is active or transitioning, or is marked for |
a3c1168a | 2066 | * restart, then don't clean this one up. */ |
b81884e7 | 2067 | |
15ed3c3a LP |
2068 | if (other->job) |
2069 | return false; | |
a3c1168a | 2070 | |
15ed3c3a LP |
2071 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
2072 | return false; | |
a3c1168a | 2073 | |
15ed3c3a LP |
2074 | if (unit_will_restart(other)) |
2075 | return false; | |
bea355da LP |
2076 | } |
2077 | ||
a3c1168a LP |
2078 | return true; |
2079 | } | |
f3bff0eb | 2080 | |
0bc488c9 LP |
2081 | bool unit_is_upheld_by_active(Unit *u, Unit **ret_culprit) { |
2082 | Unit *other; | |
2083 | ||
2084 | assert(u); | |
2085 | ||
2086 | /* Checks if the unit needs to be started because it currently is not running, but some other unit | |
2087 | * that is active declared an Uphold= dependencies on it */ | |
2088 | ||
2089 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) || u->job) { | |
2090 | if (ret_culprit) | |
2091 | *ret_culprit = NULL; | |
2092 | return false; | |
2093 | } | |
2094 | ||
2095 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_START_STEADILY) { | |
2096 | if (other->job) | |
2097 | continue; | |
2098 | ||
2099 | if (UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
2100 | if (ret_culprit) | |
2101 | *ret_culprit = other; | |
2102 | return true; | |
2103 | } | |
2104 | } | |
2105 | ||
2106 | if (ret_culprit) | |
2107 | *ret_culprit = NULL; | |
2108 | return false; | |
2109 | } | |
2110 | ||
56c59592 LP |
2111 | bool unit_is_bound_by_inactive(Unit *u, Unit **ret_culprit) { |
2112 | Unit *other; | |
2113 | ||
2114 | assert(u); | |
2115 | ||
2116 | /* Checks whether this unit is bound to another unit that is inactive, i.e. whether we should stop | |
7802194a | 2117 | * because the other unit is down. */ |
56c59592 LP |
2118 | |
2119 | if (unit_active_state(u) != UNIT_ACTIVE || u->job) { | |
2120 | /* Don't clean up while the unit is transitioning or is even inactive. */ | |
2121 | if (ret_culprit) | |
2122 | *ret_culprit = NULL; | |
2123 | return false; | |
2124 | } | |
2125 | ||
2126 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { | |
2127 | if (other->job) | |
2128 | continue; | |
2129 | ||
2130 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) { | |
2131 | if (*ret_culprit) | |
2132 | *ret_culprit = other; | |
2133 | ||
2134 | return true; | |
2135 | } | |
2136 | } | |
2137 | ||
2138 | if (ret_culprit) | |
2139 | *ret_culprit = NULL; | |
2140 | return false; | |
2141 | } | |
2142 | ||
a3c1168a | 2143 | static void check_unneeded_dependencies(Unit *u) { |
15ed3c3a | 2144 | Unit *other; |
a3c1168a LP |
2145 | assert(u); |
2146 | ||
2147 | /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */ | |
2148 | ||
15ed3c3a LP |
2149 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_STOP_WHEN_UNNEEDED_QUEUE) |
2150 | unit_submit_to_stop_when_unneeded_queue(other); | |
f3bff0eb LP |
2151 | } |
2152 | ||
0bc488c9 LP |
2153 | static void check_uphold_dependencies(Unit *u) { |
2154 | Unit *other; | |
2155 | assert(u); | |
2156 | ||
2157 | /* Add all units this unit depends on to the queue that processes Uphold= behaviour. */ | |
2158 | ||
2159 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_START_WHEN_UPHELD_QUEUE) | |
2160 | unit_submit_to_start_when_upheld_queue(other); | |
2161 | } | |
2162 | ||
56c59592 | 2163 | static void check_bound_by_dependencies(Unit *u) { |
ff502445 | 2164 | Unit *other; |
ff502445 LP |
2165 | assert(u); |
2166 | ||
56c59592 | 2167 | /* Add all units this unit depends on to the queue that processes BindsTo= stop behaviour. */ |
ff502445 | 2168 | |
56c59592 LP |
2169 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_CANNOT_BE_ACTIVE_WITHOUT_QUEUE) |
2170 | unit_submit_to_stop_when_bound_queue(other); | |
ff502445 LP |
2171 | } |
2172 | ||
87f0e418 | 2173 | static void retroactively_start_dependencies(Unit *u) { |
87f0e418 LP |
2174 | Unit *other; |
2175 | ||
2176 | assert(u); | |
2177 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2178 | ||
15ed3c3a LP |
2179 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_REPLACE) /* Requires= + BindsTo= */ |
2180 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
b81884e7 | 2181 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2182 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
b81884e7 | 2183 | |
15ed3c3a LP |
2184 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_FAIL) /* Wants= */ |
2185 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
b81884e7 | 2186 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2187 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL, NULL); |
87f0e418 | 2188 | |
15ed3c3a | 2189 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_START) /* Conflicts= (and inverse) */ |
b81884e7 | 2190 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2191 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
87f0e418 LP |
2192 | } |
2193 | ||
2194 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 LP |
2195 | Unit *other; |
2196 | ||
2197 | assert(u); | |
2198 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2199 | ||
b81884e7 | 2200 | /* Pull down units which are bound to us recursively if enabled */ |
15ed3c3a | 2201 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_STOP) /* BoundBy= */ |
b81884e7 | 2202 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2203 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
cd0504d0 MS |
2204 | } |
2205 | ||
294446dc LP |
2206 | void unit_start_on_failure( |
2207 | Unit *u, | |
2208 | const char *dependency_name, | |
2209 | UnitDependencyAtom atom, | |
2210 | JobMode job_mode) { | |
2211 | ||
15ed3c3a | 2212 | bool logged = false; |
c0daa706 | 2213 | Unit *other; |
7f66b026 | 2214 | int r; |
c0daa706 LP |
2215 | |
2216 | assert(u); | |
294446dc LP |
2217 | assert(dependency_name); |
2218 | assert(IN_SET(atom, UNIT_ATOM_ON_SUCCESS, UNIT_ATOM_ON_FAILURE)); | |
2219 | ||
2220 | /* Act on OnFailure= and OnSuccess= dependencies */ | |
c0daa706 | 2221 | |
294446dc | 2222 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { |
7f66b026 | 2223 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
222ae6a8 | 2224 | |
15ed3c3a | 2225 | if (!logged) { |
294446dc | 2226 | log_unit_info(u, "Triggering %s dependencies.", dependency_name); |
15ed3c3a LP |
2227 | logged = true; |
2228 | } | |
2229 | ||
294446dc | 2230 | r = manager_add_job(u->manager, JOB_START, other, job_mode, NULL, &error, NULL); |
c1b6628d | 2231 | if (r < 0) |
294446dc LP |
2232 | log_unit_warning_errno( |
2233 | u, r, "Failed to enqueue %s job, ignoring: %s", | |
2234 | dependency_name, bus_error_message(&error, r)); | |
222ae6a8 | 2235 | } |
294446dc LP |
2236 | |
2237 | if (logged) | |
2238 | log_unit_debug(u, "Triggering %s dependencies done.", dependency_name); | |
c0daa706 LP |
2239 | } |
2240 | ||
3ecaa09b LP |
2241 | void unit_trigger_notify(Unit *u) { |
2242 | Unit *other; | |
3ecaa09b LP |
2243 | |
2244 | assert(u); | |
2245 | ||
15ed3c3a | 2246 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_TRIGGERED_BY) |
3ecaa09b LP |
2247 | if (UNIT_VTABLE(other)->trigger_notify) |
2248 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2249 | } | |
2250 | ||
37109b85 ZJS |
2251 | static int raise_level(int log_level, bool condition_info, bool condition_notice) { |
2252 | if (condition_notice && log_level > LOG_NOTICE) | |
2253 | return LOG_NOTICE; | |
2254 | if (condition_info && log_level > LOG_INFO) | |
2255 | return LOG_INFO; | |
2256 | return log_level; | |
2257 | } | |
2258 | ||
915b1d01 | 2259 | static int unit_log_resources(Unit *u) { |
bc40a20e LP |
2260 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + _CGROUP_IO_ACCOUNTING_METRIC_MAX + 4]; |
2261 | bool any_traffic = false, have_ip_accounting = false, any_io = false, have_io_accounting = false; | |
2262 | _cleanup_free_ char *igress = NULL, *egress = NULL, *rr = NULL, *wr = NULL; | |
162392b7 | 2263 | int log_level = LOG_DEBUG; /* May be raised if resources consumed over a threshold */ |
915b1d01 | 2264 | size_t n_message_parts = 0, n_iovec = 0; |
bc40a20e | 2265 | char* message_parts[1 + 2 + 2 + 1], *t; |
915b1d01 | 2266 | nsec_t nsec = NSEC_INFINITY; |
915b1d01 LP |
2267 | int r; |
2268 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2269 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2270 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2271 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2272 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2273 | }; | |
bc40a20e LP |
2274 | const char* const io_fields[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
2275 | [CGROUP_IO_READ_BYTES] = "IO_METRIC_READ_BYTES", | |
2276 | [CGROUP_IO_WRITE_BYTES] = "IO_METRIC_WRITE_BYTES", | |
2277 | [CGROUP_IO_READ_OPERATIONS] = "IO_METRIC_READ_OPERATIONS", | |
2278 | [CGROUP_IO_WRITE_OPERATIONS] = "IO_METRIC_WRITE_OPERATIONS", | |
2279 | }; | |
915b1d01 LP |
2280 | |
2281 | assert(u); | |
2282 | ||
2283 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2284 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2285 | * information and the complete data in structured fields. */ | |
2286 | ||
2287 | (void) unit_get_cpu_usage(u, &nsec); | |
2288 | if (nsec != NSEC_INFINITY) { | |
915b1d01 LP |
2289 | /* Format the CPU time for inclusion in the structured log message */ |
2290 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2291 | r = log_oom(); | |
2292 | goto finish; | |
2293 | } | |
2294 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2295 | ||
2296 | /* Format the CPU time for inclusion in the human language message string */ | |
5291f26d | 2297 | t = strjoin("consumed ", FORMAT_TIMESPAN(nsec / NSEC_PER_USEC, USEC_PER_MSEC), " CPU time"); |
915b1d01 LP |
2298 | if (!t) { |
2299 | r = log_oom(); | |
2300 | goto finish; | |
2301 | } | |
2302 | ||
2303 | message_parts[n_message_parts++] = t; | |
37109b85 ZJS |
2304 | |
2305 | log_level = raise_level(log_level, | |
2306 | nsec > NOTICEWORTHY_CPU_NSEC, | |
2307 | nsec > MENTIONWORTHY_CPU_NSEC); | |
915b1d01 LP |
2308 | } |
2309 | ||
bc40a20e | 2310 | for (CGroupIOAccountingMetric k = 0; k < _CGROUP_IO_ACCOUNTING_METRIC_MAX; k++) { |
bc40a20e LP |
2311 | uint64_t value = UINT64_MAX; |
2312 | ||
2313 | assert(io_fields[k]); | |
2314 | ||
2315 | (void) unit_get_io_accounting(u, k, k > 0, &value); | |
2316 | if (value == UINT64_MAX) | |
2317 | continue; | |
2318 | ||
2319 | have_io_accounting = true; | |
2320 | if (value > 0) | |
2321 | any_io = true; | |
2322 | ||
2323 | /* Format IO accounting data for inclusion in the structured log message */ | |
2324 | if (asprintf(&t, "%s=%" PRIu64, io_fields[k], value) < 0) { | |
2325 | r = log_oom(); | |
2326 | goto finish; | |
2327 | } | |
2328 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2329 | ||
2330 | /* Format the IO accounting data for inclusion in the human language message string, but only | |
2331 | * for the bytes counters (and not for the operations counters) */ | |
2332 | if (k == CGROUP_IO_READ_BYTES) { | |
2333 | assert(!rr); | |
2b59bf51 | 2334 | rr = strjoin("read ", strna(FORMAT_BYTES(value)), " from disk"); |
bc40a20e LP |
2335 | if (!rr) { |
2336 | r = log_oom(); | |
2337 | goto finish; | |
2338 | } | |
2339 | } else if (k == CGROUP_IO_WRITE_BYTES) { | |
2340 | assert(!wr); | |
2b59bf51 | 2341 | wr = strjoin("written ", strna(FORMAT_BYTES(value)), " to disk"); |
bc40a20e LP |
2342 | if (!wr) { |
2343 | r = log_oom(); | |
2344 | goto finish; | |
2345 | } | |
2346 | } | |
37109b85 ZJS |
2347 | |
2348 | if (IN_SET(k, CGROUP_IO_READ_BYTES, CGROUP_IO_WRITE_BYTES)) | |
2349 | log_level = raise_level(log_level, | |
2350 | value > MENTIONWORTHY_IO_BYTES, | |
2351 | value > NOTICEWORTHY_IO_BYTES); | |
bc40a20e LP |
2352 | } |
2353 | ||
2354 | if (have_io_accounting) { | |
2355 | if (any_io) { | |
2356 | if (rr) | |
2357 | message_parts[n_message_parts++] = TAKE_PTR(rr); | |
2358 | if (wr) | |
2359 | message_parts[n_message_parts++] = TAKE_PTR(wr); | |
2360 | ||
2361 | } else { | |
2362 | char *k; | |
2363 | ||
2364 | k = strdup("no IO"); | |
2365 | if (!k) { | |
2366 | r = log_oom(); | |
2367 | goto finish; | |
2368 | } | |
2369 | ||
2370 | message_parts[n_message_parts++] = k; | |
2371 | } | |
2372 | } | |
2373 | ||
12375b95 | 2374 | for (CGroupIPAccountingMetric m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
915b1d01 LP |
2375 | uint64_t value = UINT64_MAX; |
2376 | ||
2377 | assert(ip_fields[m]); | |
2378 | ||
2379 | (void) unit_get_ip_accounting(u, m, &value); | |
2380 | if (value == UINT64_MAX) | |
2381 | continue; | |
82044702 LP |
2382 | |
2383 | have_ip_accounting = true; | |
a87b1faa LP |
2384 | if (value > 0) |
2385 | any_traffic = true; | |
915b1d01 LP |
2386 | |
2387 | /* Format IP accounting data for inclusion in the structured log message */ | |
2388 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2389 | r = log_oom(); | |
2390 | goto finish; | |
2391 | } | |
2392 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2393 | ||
2394 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2395 | * bytes counters (and not for the packets counters) */ | |
a87b1faa LP |
2396 | if (m == CGROUP_IP_INGRESS_BYTES) { |
2397 | assert(!igress); | |
2b59bf51 | 2398 | igress = strjoin("received ", strna(FORMAT_BYTES(value)), " IP traffic"); |
a87b1faa LP |
2399 | if (!igress) { |
2400 | r = log_oom(); | |
2401 | goto finish; | |
2402 | } | |
2403 | } else if (m == CGROUP_IP_EGRESS_BYTES) { | |
2404 | assert(!egress); | |
2b59bf51 | 2405 | egress = strjoin("sent ", strna(FORMAT_BYTES(value)), " IP traffic"); |
a87b1faa LP |
2406 | if (!egress) { |
2407 | r = log_oom(); | |
2408 | goto finish; | |
2409 | } | |
2410 | } | |
37109b85 ZJS |
2411 | |
2412 | if (IN_SET(m, CGROUP_IP_INGRESS_BYTES, CGROUP_IP_EGRESS_BYTES)) | |
2413 | log_level = raise_level(log_level, | |
2414 | value > MENTIONWORTHY_IP_BYTES, | |
2415 | value > NOTICEWORTHY_IP_BYTES); | |
a87b1faa LP |
2416 | } |
2417 | ||
c2503e35 RH |
2418 | /* This check is here because it is the earliest point following all possible log_level assignments. If |
2419 | * log_level is assigned anywhere after this point, move this check. */ | |
2420 | if (!unit_log_level_test(u, log_level)) { | |
2421 | r = 0; | |
2422 | goto finish; | |
2423 | } | |
2424 | ||
82044702 LP |
2425 | if (have_ip_accounting) { |
2426 | if (any_traffic) { | |
2427 | if (igress) | |
2428 | message_parts[n_message_parts++] = TAKE_PTR(igress); | |
2429 | if (egress) | |
2430 | message_parts[n_message_parts++] = TAKE_PTR(egress); | |
a87b1faa | 2431 | |
82044702 LP |
2432 | } else { |
2433 | char *k; | |
915b1d01 | 2434 | |
82044702 LP |
2435 | k = strdup("no IP traffic"); |
2436 | if (!k) { | |
2437 | r = log_oom(); | |
2438 | goto finish; | |
2439 | } | |
2440 | ||
2441 | message_parts[n_message_parts++] = k; | |
2442 | } | |
915b1d01 LP |
2443 | } |
2444 | ||
2445 | /* Is there any accounting data available at all? */ | |
2446 | if (n_iovec == 0) { | |
2447 | r = 0; | |
2448 | goto finish; | |
2449 | } | |
2450 | ||
2451 | if (n_message_parts == 0) | |
a87b1faa | 2452 | t = strjoina("MESSAGE=", u->id, ": Completed."); |
915b1d01 | 2453 | else { |
c2b2df60 | 2454 | _cleanup_free_ char *joined = NULL; |
915b1d01 LP |
2455 | |
2456 | message_parts[n_message_parts] = NULL; | |
2457 | ||
2458 | joined = strv_join(message_parts, ", "); | |
2459 | if (!joined) { | |
2460 | r = log_oom(); | |
2461 | goto finish; | |
2462 | } | |
2463 | ||
ec9d636b | 2464 | joined[0] = ascii_toupper(joined[0]); |
a87b1faa | 2465 | t = strjoina("MESSAGE=", u->id, ": ", joined, "."); |
915b1d01 LP |
2466 | } |
2467 | ||
2468 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2469 | * and hence don't increase n_iovec for them */ | |
2470 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2471 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2472 | ||
2473 | t = strjoina(u->manager->unit_log_field, u->id); | |
2474 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2475 | ||
2476 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2477 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2478 | ||
c2503e35 | 2479 | log_unit_struct_iovec(u, log_level, iovec, n_iovec + 4); |
915b1d01 LP |
2480 | r = 0; |
2481 | ||
2482 | finish: | |
12375b95 | 2483 | for (size_t i = 0; i < n_message_parts; i++) |
915b1d01 LP |
2484 | free(message_parts[i]); |
2485 | ||
12375b95 | 2486 | for (size_t i = 0; i < n_iovec; i++) |
915b1d01 LP |
2487 | free(iovec[i].iov_base); |
2488 | ||
2489 | return r; | |
2490 | ||
2491 | } | |
2492 | ||
adefcf28 LP |
2493 | static void unit_update_on_console(Unit *u) { |
2494 | bool b; | |
2495 | ||
2496 | assert(u); | |
2497 | ||
2498 | b = unit_needs_console(u); | |
2499 | if (u->on_console == b) | |
2500 | return; | |
2501 | ||
2502 | u->on_console = b; | |
2503 | if (b) | |
2504 | manager_ref_console(u->manager); | |
2505 | else | |
2506 | manager_unref_console(u->manager); | |
adefcf28 LP |
2507 | } |
2508 | ||
6eb65e7c LP |
2509 | static void unit_emit_audit_start(Unit *u) { |
2510 | assert(u); | |
2511 | ||
2512 | if (u->type != UNIT_SERVICE) | |
2513 | return; | |
2514 | ||
2515 | /* Write audit record if we have just finished starting up */ | |
2516 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); | |
2517 | u->in_audit = true; | |
2518 | } | |
2519 | ||
2520 | static void unit_emit_audit_stop(Unit *u, UnitActiveState state) { | |
2521 | assert(u); | |
2522 | ||
2523 | if (u->type != UNIT_SERVICE) | |
2524 | return; | |
2525 | ||
2526 | if (u->in_audit) { | |
2527 | /* Write audit record if we have just finished shutting down */ | |
2528 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, state == UNIT_INACTIVE); | |
2529 | u->in_audit = false; | |
2530 | } else { | |
2531 | /* Hmm, if there was no start record written write it now, so that we always have a nice pair */ | |
2532 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, state == UNIT_INACTIVE); | |
2533 | ||
2534 | if (state == UNIT_INACTIVE) | |
2535 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); | |
2536 | } | |
2537 | } | |
2538 | ||
16c74914 LP |
2539 | static bool unit_process_job(Job *j, UnitActiveState ns, UnitNotifyFlags flags) { |
2540 | bool unexpected = false; | |
31cd5f63 | 2541 | JobResult result; |
16c74914 LP |
2542 | |
2543 | assert(j); | |
2544 | ||
2545 | if (j->state == JOB_WAITING) | |
2546 | ||
2547 | /* So we reached a different state for this job. Let's see if we can run it now if it failed previously | |
2548 | * due to EAGAIN. */ | |
2549 | job_add_to_run_queue(j); | |
2550 | ||
2551 | /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and | |
2552 | * hence needs to invalidate jobs. */ | |
2553 | ||
2554 | switch (j->type) { | |
2555 | ||
2556 | case JOB_START: | |
2557 | case JOB_VERIFY_ACTIVE: | |
2558 | ||
2559 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
2560 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2561 | else if (j->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
2562 | unexpected = true; | |
2563 | ||
31cd5f63 AZ |
2564 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
2565 | if (ns == UNIT_FAILED) | |
2566 | result = JOB_FAILED; | |
31cd5f63 AZ |
2567 | else |
2568 | result = JOB_DONE; | |
2569 | ||
2570 | job_finish_and_invalidate(j, result, true, false); | |
2571 | } | |
16c74914 LP |
2572 | } |
2573 | ||
2574 | break; | |
2575 | ||
2576 | case JOB_RELOAD: | |
2577 | case JOB_RELOAD_OR_START: | |
2578 | case JOB_TRY_RELOAD: | |
2579 | ||
2580 | if (j->state == JOB_RUNNING) { | |
2581 | if (ns == UNIT_ACTIVE) | |
2582 | job_finish_and_invalidate(j, (flags & UNIT_NOTIFY_RELOAD_FAILURE) ? JOB_FAILED : JOB_DONE, true, false); | |
2583 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { | |
2584 | unexpected = true; | |
2585 | ||
2586 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2587 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2588 | } | |
2589 | } | |
2590 | ||
2591 | break; | |
2592 | ||
2593 | case JOB_STOP: | |
2594 | case JOB_RESTART: | |
2595 | case JOB_TRY_RESTART: | |
2596 | ||
2597 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2598 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2599 | else if (j->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
2600 | unexpected = true; | |
2601 | job_finish_and_invalidate(j, JOB_FAILED, true, false); | |
2602 | } | |
2603 | ||
2604 | break; | |
2605 | ||
2606 | default: | |
04499a70 | 2607 | assert_not_reached(); |
16c74914 LP |
2608 | } |
2609 | ||
2610 | return unexpected; | |
2611 | } | |
2612 | ||
2ad2e41a | 2613 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, UnitNotifyFlags flags) { |
429926e9 | 2614 | const char *reason; |
8559b3b7 | 2615 | Manager *m; |
a096ed36 | 2616 | |
87f0e418 LP |
2617 | assert(u); |
2618 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2619 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2620 | |
8559b3b7 LP |
2621 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2622 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2623 | * remounted this function will be called too! */ | |
87f0e418 | 2624 | |
546ac4f0 MS |
2625 | m = u->manager; |
2626 | ||
3c4832ad LP |
2627 | /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in |
2628 | * the bus queue, so that any job change signal queued will force out the unit change signal first. */ | |
2629 | unit_add_to_dbus_queue(u); | |
2630 | ||
e30bbc90 AZ |
2631 | /* Update systemd-oomd on the property/state change */ |
2632 | if (os != ns) { | |
2633 | /* Always send an update if the unit is going into an inactive state so systemd-oomd knows to stop | |
2634 | * monitoring. | |
2635 | * Also send an update whenever the unit goes active; this is to handle a case where an override file | |
2636 | * sets one of the ManagedOOM*= properties to "kill", then later removes it. systemd-oomd needs to | |
2637 | * know to stop monitoring when the unit changes from "kill" -> "auto" on daemon-reload, but we don't | |
2638 | * have the information on the property. Thus, indiscriminately send an update. */ | |
f561e8c6 | 2639 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) || UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
e30bbc90 AZ |
2640 | (void) manager_varlink_send_managed_oom_update(u); |
2641 | } | |
2642 | ||
f755e3b7 | 2643 | /* Update timestamps for state changes */ |
2c289ea8 | 2644 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2645 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2646 | |
bdbf9951 | 2647 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2648 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2649 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2650 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2651 | |
2652 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2653 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2654 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2655 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2656 | } |
87f0e418 | 2657 | |
865cc19a | 2658 | /* Keep track of failed units */ |
8724defe | 2659 | (void) manager_update_failed_units(m, u, ns == UNIT_FAILED); |
f755e3b7 | 2660 | |
d3070fbd LP |
2661 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2662 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
ff68472a ZJS |
2663 | SET_FLAG(u->markers, |
2664 | (1u << UNIT_MARKER_NEEDS_RELOAD)|(1u << UNIT_MARKER_NEEDS_RESTART), | |
2665 | false); | |
efdb0237 | 2666 | unit_prune_cgroup(u); |
d3070fbd | 2667 | unit_unlink_state_files(u); |
ff68472a ZJS |
2668 | } else if (ns != os && ns == UNIT_RELOADING) |
2669 | SET_FLAG(u->markers, 1u << UNIT_MARKER_NEEDS_RELOAD, false); | |
fb385181 | 2670 | |
adefcf28 | 2671 | unit_update_on_console(u); |
7ed9f6cd | 2672 | |
2c289ea8 | 2673 | if (!MANAGER_IS_RELOADING(m)) { |
a1c7334b LP |
2674 | bool unexpected; |
2675 | ||
2676 | /* Let's propagate state changes to the job */ | |
2677 | if (u->job) | |
2678 | unexpected = unit_process_job(u->job, ns, flags); | |
2679 | else | |
2680 | unexpected = true; | |
f3bff0eb | 2681 | |
a1c7334b LP |
2682 | /* If this state change happened without being requested by a job, then let's retroactively start or |
2683 | * stop dependencies. We skip that step when deserializing, since we don't want to create any | |
2684 | * additional jobs just because something is already activated. */ | |
bdbf9951 LP |
2685 | |
2686 | if (unexpected) { | |
2687 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2688 | retroactively_start_dependencies(u); | |
2689 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2690 | retroactively_stop_dependencies(u); | |
2691 | } | |
5de9682c | 2692 | |
bdbf9951 | 2693 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2694 | log_unit_debug(u, "Unit entered failed state."); |
2ad2e41a LP |
2695 | |
2696 | if (!(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
294446dc | 2697 | unit_start_on_failure(u, "OnFailure=", UNIT_ATOM_ON_FAILURE, u->on_failure_job_mode); |
cd6d0a45 | 2698 | } |
e537352b | 2699 | |
256f65d0 LP |
2700 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns) && !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
2701 | /* This unit just finished starting up */ | |
3b2775c5 | 2702 | |
6eb65e7c | 2703 | unit_emit_audit_start(u); |
546ac4f0 | 2704 | manager_send_unit_plymouth(m, u); |
256f65d0 | 2705 | } |
bdbf9951 | 2706 | |
256f65d0 | 2707 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && !UNIT_IS_INACTIVE_OR_FAILED(os)) { |
915b1d01 | 2708 | /* This unit just stopped/failed. */ |
256f65d0 | 2709 | |
6eb65e7c | 2710 | unit_emit_audit_stop(u, ns); |
915b1d01 | 2711 | unit_log_resources(u); |
cd6d0a45 | 2712 | } |
294446dc LP |
2713 | |
2714 | if (ns == UNIT_INACTIVE && !IN_SET(os, UNIT_FAILED, UNIT_INACTIVE, UNIT_MAINTENANCE) && | |
2715 | !(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
2716 | unit_start_on_failure(u, "OnSuccess=", UNIT_ATOM_ON_SUCCESS, u->on_success_job_mode); | |
f278026d LP |
2717 | } |
2718 | ||
31dc1ca3 LP |
2719 | manager_recheck_journal(m); |
2720 | manager_recheck_dbus(m); | |
e63ebf71 | 2721 | |
3ecaa09b | 2722 | unit_trigger_notify(u); |
3b2775c5 | 2723 | |
8724defe | 2724 | if (!MANAGER_IS_RELOADING(m)) { |
429926e9 TR |
2725 | if (os != UNIT_FAILED && ns == UNIT_FAILED) { |
2726 | reason = strjoina("unit ", u->id, " failed"); | |
36c4dc08 | 2727 | emergency_action(m, u->failure_action, 0, u->reboot_arg, unit_failure_action_exit_status(u), reason); |
429926e9 TR |
2728 | } else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) { |
2729 | reason = strjoina("unit ", u->id, " succeeded"); | |
36c4dc08 | 2730 | emergency_action(m, u->success_action, 0, u->reboot_arg, unit_success_action_exit_status(u), reason); |
429926e9 | 2731 | } |
ff502445 LP |
2732 | } |
2733 | ||
99e9af25 | 2734 | /* And now, add the unit or depending units to various queues that will act on the new situation if |
48008c1c | 2735 | * needed. These queues generally check for continuous state changes rather than events (like most of |
99e9af25 LP |
2736 | * the state propagation above), and do work deferred instead of instantly, since they typically |
2737 | * don't want to run during reloading, and usually involve checking combined state of multiple units | |
2738 | * at once. */ | |
2739 | ||
2740 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
2741 | /* Stop unneeded units and bound-by units regardless if going down was expected or not */ | |
2742 | check_unneeded_dependencies(u); | |
2743 | check_bound_by_dependencies(u); | |
2744 | ||
2745 | /* Maybe someone wants us to remain up? */ | |
2746 | unit_submit_to_start_when_upheld_queue(u); | |
2747 | ||
2748 | /* Maybe the unit should be GC'ed now? */ | |
2749 | unit_add_to_gc_queue(u); | |
2750 | } | |
2751 | ||
2752 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
2753 | /* Start uphold units regardless if going up was expected or not */ | |
2754 | check_uphold_dependencies(u); | |
2755 | ||
2756 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ | |
2757 | unit_submit_to_stop_when_unneeded_queue(u); | |
2758 | ||
2759 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens | |
2760 | * when something BindsTo= to a Type=oneshot unit, as these units go directly from starting to | |
2761 | * inactive, without ever entering started.) */ | |
2762 | unit_submit_to_stop_when_bound_queue(u); | |
2763 | } | |
87f0e418 LP |
2764 | } |
2765 | ||
f75f613d | 2766 | int unit_watch_pid(Unit *u, pid_t pid, bool exclusive) { |
62a76913 | 2767 | int r; |
a911bb9a | 2768 | |
87f0e418 | 2769 | assert(u); |
62a76913 | 2770 | assert(pid_is_valid(pid)); |
87f0e418 | 2771 | |
62a76913 | 2772 | /* Watch a specific PID */ |
5ba6985b | 2773 | |
f75f613d FB |
2774 | /* Caller might be sure that this PID belongs to this unit only. Let's take this |
2775 | * opportunity to remove any stalled references to this PID as they can be created | |
2776 | * easily (when watching a process which is not our direct child). */ | |
2777 | if (exclusive) | |
2778 | manager_unwatch_pid(u->manager, pid); | |
2779 | ||
d5099efc | 2780 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2781 | if (r < 0) |
2782 | return r; | |
2783 | ||
62a76913 | 2784 | r = hashmap_ensure_allocated(&u->manager->watch_pids, NULL); |
a911bb9a LP |
2785 | if (r < 0) |
2786 | return r; | |
2787 | ||
62a76913 LP |
2788 | /* First try, let's add the unit keyed by "pid". */ |
2789 | r = hashmap_put(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2790 | if (r == -EEXIST) { | |
2791 | Unit **array; | |
2792 | bool found = false; | |
2793 | size_t n = 0; | |
05e343b7 | 2794 | |
62a76913 LP |
2795 | /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points |
2796 | * to an array of Units rather than just a Unit), lists us already. */ | |
a911bb9a | 2797 | |
62a76913 LP |
2798 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); |
2799 | if (array) | |
2800 | for (; array[n]; n++) | |
2801 | if (array[n] == u) | |
2802 | found = true; | |
a911bb9a | 2803 | |
62a76913 LP |
2804 | if (found) /* Found it already? if so, do nothing */ |
2805 | r = 0; | |
2806 | else { | |
2807 | Unit **new_array; | |
2808 | ||
2809 | /* Allocate a new array */ | |
2810 | new_array = new(Unit*, n + 2); | |
2811 | if (!new_array) | |
2812 | return -ENOMEM; | |
2813 | ||
2814 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2815 | new_array[n] = u; | |
2816 | new_array[n+1] = NULL; | |
2817 | ||
2818 | /* Add or replace the old array */ | |
2819 | r = hashmap_replace(u->manager->watch_pids, PID_TO_PTR(-pid), new_array); | |
2820 | if (r < 0) { | |
2821 | free(new_array); | |
2822 | return r; | |
2823 | } | |
2824 | ||
2825 | free(array); | |
2826 | } | |
2827 | } else if (r < 0) | |
2828 | return r; | |
2829 | ||
2830 | r = set_put(u->pids, PID_TO_PTR(pid)); | |
2831 | if (r < 0) | |
2832 | return r; | |
2833 | ||
2834 | return 0; | |
87f0e418 LP |
2835 | } |
2836 | ||
2837 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
62a76913 LP |
2838 | Unit **array; |
2839 | ||
87f0e418 | 2840 | assert(u); |
62a76913 LP |
2841 | assert(pid_is_valid(pid)); |
2842 | ||
2843 | /* First let's drop the unit in case it's keyed as "pid". */ | |
2844 | (void) hashmap_remove_value(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2845 | ||
2846 | /* Then, let's also drop the unit, in case it's in the array keyed by -pid */ | |
2847 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); | |
2848 | if (array) { | |
62a76913 | 2849 | /* Let's iterate through the array, dropping our own entry */ |
12375b95 ZJS |
2850 | |
2851 | size_t m = 0; | |
2852 | for (size_t n = 0; array[n]; n++) | |
62a76913 LP |
2853 | if (array[n] != u) |
2854 | array[m++] = array[n]; | |
2855 | array[m] = NULL; | |
2856 | ||
2857 | if (m == 0) { | |
2858 | /* The array is now empty, remove the entire entry */ | |
20c3acfa | 2859 | assert_se(hashmap_remove(u->manager->watch_pids, PID_TO_PTR(-pid)) == array); |
62a76913 LP |
2860 | free(array); |
2861 | } | |
2862 | } | |
87f0e418 | 2863 | |
fea72cc0 | 2864 | (void) set_remove(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2865 | } |
2866 | ||
bd44e61b LP |
2867 | void unit_unwatch_all_pids(Unit *u) { |
2868 | assert(u); | |
2869 | ||
2870 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2871 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2872 | |
efdb0237 | 2873 | u->pids = set_free(u->pids); |
a911bb9a LP |
2874 | } |
2875 | ||
50be4f4a LP |
2876 | static void unit_tidy_watch_pids(Unit *u) { |
2877 | pid_t except1, except2; | |
a911bb9a LP |
2878 | void *e; |
2879 | ||
2880 | assert(u); | |
2881 | ||
2882 | /* Cleans dead PIDs from our list */ | |
2883 | ||
50be4f4a LP |
2884 | except1 = unit_main_pid(u); |
2885 | except2 = unit_control_pid(u); | |
2886 | ||
90e74a66 | 2887 | SET_FOREACH(e, u->pids) { |
fea72cc0 | 2888 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2889 | |
2890 | if (pid == except1 || pid == except2) | |
2891 | continue; | |
2892 | ||
9f5650ae | 2893 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2894 | unit_unwatch_pid(u, pid); |
a911bb9a | 2895 | } |
87f0e418 LP |
2896 | } |
2897 | ||
50be4f4a LP |
2898 | static int on_rewatch_pids_event(sd_event_source *s, void *userdata) { |
2899 | Unit *u = userdata; | |
2900 | ||
2901 | assert(s); | |
2902 | assert(u); | |
2903 | ||
2904 | unit_tidy_watch_pids(u); | |
2905 | unit_watch_all_pids(u); | |
2906 | ||
2907 | /* If the PID set is empty now, then let's finish this off. */ | |
2908 | unit_synthesize_cgroup_empty_event(u); | |
2909 | ||
2910 | return 0; | |
2911 | } | |
2912 | ||
2913 | int unit_enqueue_rewatch_pids(Unit *u) { | |
2914 | int r; | |
2915 | ||
2916 | assert(u); | |
2917 | ||
2918 | if (!u->cgroup_path) | |
2919 | return -ENOENT; | |
2920 | ||
2921 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
2922 | if (r < 0) | |
2923 | return r; | |
2924 | if (r > 0) /* On unified we can use proper notifications */ | |
2925 | return 0; | |
2926 | ||
2927 | /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new | |
2928 | * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it | |
2929 | * involves issuing kill(pid, 0) on all processes we watch. */ | |
2930 | ||
2931 | if (!u->rewatch_pids_event_source) { | |
2932 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
2933 | ||
2934 | r = sd_event_add_defer(u->manager->event, &s, on_rewatch_pids_event, u); | |
2935 | if (r < 0) | |
2936 | return log_error_errno(r, "Failed to allocate event source for tidying watched PIDs: %m"); | |
2937 | ||
2938 | r = sd_event_source_set_priority(s, SD_EVENT_PRIORITY_IDLE); | |
2939 | if (r < 0) | |
28b77ab2 | 2940 | return log_error_errno(r, "Failed to adjust priority of event source for tidying watched PIDs: %m"); |
50be4f4a LP |
2941 | |
2942 | (void) sd_event_source_set_description(s, "tidy-watch-pids"); | |
2943 | ||
2944 | u->rewatch_pids_event_source = TAKE_PTR(s); | |
2945 | } | |
2946 | ||
2947 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_ONESHOT); | |
2948 | if (r < 0) | |
2949 | return log_error_errno(r, "Failed to enable event source for tidying watched PIDs: %m"); | |
2950 | ||
2951 | return 0; | |
2952 | } | |
2953 | ||
2954 | void unit_dequeue_rewatch_pids(Unit *u) { | |
2955 | int r; | |
2956 | assert(u); | |
2957 | ||
2958 | if (!u->rewatch_pids_event_source) | |
2959 | return; | |
2960 | ||
2961 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_OFF); | |
2962 | if (r < 0) | |
2963 | log_warning_errno(r, "Failed to disable event source for tidying watched PIDs, ignoring: %m"); | |
2964 | ||
5dcadb4c | 2965 | u->rewatch_pids_event_source = sd_event_source_disable_unref(u->rewatch_pids_event_source); |
50be4f4a LP |
2966 | } |
2967 | ||
87f0e418 LP |
2968 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2969 | assert(u); | |
2970 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2971 | ||
2972 | switch (j) { | |
2973 | ||
2974 | case JOB_VERIFY_ACTIVE: | |
2975 | case JOB_START: | |
e0209d83 | 2976 | case JOB_NOP: |
f5869324 | 2977 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
86b52a39 | 2978 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueuing |
f5869324 | 2979 | * jobs for it. */ |
87f0e418 LP |
2980 | return true; |
2981 | ||
f5869324 LP |
2982 | case JOB_STOP: |
2983 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
86b52a39 | 2984 | * external events), hence it makes no sense to permit enqueuing such a request either. */ |
f5869324 LP |
2985 | return !u->perpetual; |
2986 | ||
87f0e418 LP |
2987 | case JOB_RESTART: |
2988 | case JOB_TRY_RESTART: | |
f5869324 | 2989 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
2990 | |
2991 | case JOB_RELOAD: | |
3282591d | 2992 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2993 | return unit_can_reload(u); |
2994 | ||
2995 | case JOB_RELOAD_OR_START: | |
2996 | return unit_can_reload(u) && unit_can_start(u); | |
2997 | ||
2998 | default: | |
04499a70 | 2999 | assert_not_reached(); |
87f0e418 LP |
3000 | } |
3001 | } | |
3002 | ||
eef85c4a LP |
3003 | int unit_add_dependency( |
3004 | Unit *u, | |
3005 | UnitDependency d, | |
3006 | Unit *other, | |
3007 | bool add_reference, | |
3008 | UnitDependencyMask mask) { | |
87f0e418 LP |
3009 | |
3010 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
3011 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
be7d9ff7 | 3012 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7e9212bf | 3013 | [UNIT_WANTS] = UNIT_WANTED_BY, |
7f2cddae | 3014 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 3015 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
0bc488c9 | 3016 | [UNIT_UPHOLDS] = UNIT_UPHELD_BY, |
be7d9ff7 | 3017 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 3018 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 3019 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 3020 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 3021 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
0bc488c9 | 3022 | [UNIT_UPHELD_BY] = UNIT_UPHOLDS, |
69dd2852 LP |
3023 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
3024 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 3025 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 3026 | [UNIT_AFTER] = UNIT_BEFORE, |
294446dc LP |
3027 | [UNIT_ON_SUCCESS] = UNIT_ON_SUCCESS_OF, |
3028 | [UNIT_ON_SUCCESS_OF] = UNIT_ON_SUCCESS, | |
629b2a6f LP |
3029 | [UNIT_ON_FAILURE] = UNIT_ON_FAILURE_OF, |
3030 | [UNIT_ON_FAILURE_OF] = UNIT_ON_FAILURE, | |
57020a3a | 3031 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, |
4dcc1cb4 | 3032 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 3033 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 3034 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
ffec78c0 LP |
3035 | [UNIT_PROPAGATES_STOP_TO] = UNIT_STOP_PROPAGATED_FROM, |
3036 | [UNIT_STOP_PROPAGATED_FROM] = UNIT_PROPAGATES_STOP_TO, | |
defe63b0 | 3037 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, /* symmetric! 👓 */ |
7e9212bf LP |
3038 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
3039 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, | |
d219a2b0 LP |
3040 | [UNIT_IN_SLICE] = UNIT_SLICE_OF, |
3041 | [UNIT_SLICE_OF] = UNIT_IN_SLICE, | |
87f0e418 | 3042 | }; |
eef85c4a | 3043 | Unit *original_u = u, *original_other = other; |
15ed3c3a | 3044 | UnitDependencyAtom a; |
eef85c4a | 3045 | int r; |
15ed3c3a LP |
3046 | |
3047 | /* Helper to know whether sending a notification is necessary or not: if the dependency is already | |
3048 | * there, no need to notify! */ | |
3049 | bool noop; | |
87f0e418 LP |
3050 | |
3051 | assert(u); | |
3052 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
3053 | assert(other); |
3054 | ||
9f151f29 LP |
3055 | u = unit_follow_merge(u); |
3056 | other = unit_follow_merge(other); | |
15ed3c3a LP |
3057 | a = unit_dependency_to_atom(d); |
3058 | assert(a >= 0); | |
9f151f29 | 3059 | |
15ed3c3a | 3060 | /* We won't allow dependencies on ourselves. We will not consider them an error however. */ |
d1fab3fe | 3061 | if (u == other) { |
15ed3c3a | 3062 | unit_maybe_warn_about_dependency(original_u, original_other->id, d); |
87f0e418 | 3063 | return 0; |
d1fab3fe | 3064 | } |
87f0e418 | 3065 | |
f14d6810 MG |
3066 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3067 | return 0; | |
3068 | ||
15ed3c3a LP |
3069 | /* Note that ordering a device unit after a unit is permitted since it allows to start its job |
3070 | * running timeout at a specific time. */ | |
3071 | if (FLAGS_SET(a, UNIT_ATOM_BEFORE) && other->type == UNIT_DEVICE) { | |
b862c257 | 3072 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
c80a9a33 LP |
3073 | return 0; |
3074 | } | |
3075 | ||
15ed3c3a | 3076 | if (FLAGS_SET(a, UNIT_ATOM_ON_FAILURE) && !UNIT_VTABLE(u)->can_fail) { |
c80a9a33 LP |
3077 | log_unit_warning(u, "Requested dependency OnFailure=%s ignored (%s units cannot fail).", other->id, unit_type_to_string(u->type)); |
3078 | return 0; | |
3079 | } | |
3080 | ||
15ed3c3a | 3081 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERS) && !UNIT_VTABLE(u)->can_trigger) |
c80a9a33 LP |
3082 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3083 | "Requested dependency Triggers=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(u->type)); | |
15ed3c3a | 3084 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERED_BY) && !UNIT_VTABLE(other)->can_trigger) |
c80a9a33 LP |
3085 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3086 | "Requested dependency TriggeredBy=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(other->type)); | |
3087 | ||
d219a2b0 LP |
3088 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && other->type != UNIT_SLICE) |
3089 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3090 | "Requested dependency Slice=%s refused (%s is not a slice unit).", other->id, other->id); | |
3091 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && u->type != UNIT_SLICE) | |
3092 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3093 | "Requested dependency SliceOf=%s refused (%s is not a slice unit).", other->id, u->id); | |
3094 | ||
3095 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && !UNIT_HAS_CGROUP_CONTEXT(u)) | |
3096 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3097 | "Requested dependency Slice=%s refused (%s is not a cgroup unit).", other->id, u->id); | |
3098 | ||
3099 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && !UNIT_HAS_CGROUP_CONTEXT(other)) | |
3100 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3101 | "Requested dependency SliceOf=%s refused (%s is not a cgroup unit).", other->id, other->id); | |
3102 | ||
15ed3c3a | 3103 | r = unit_add_dependency_hashmap(&u->dependencies, d, other, mask, 0); |
613b411c | 3104 | if (r < 0) |
87f0e418 | 3105 | return r; |
15ed3c3a | 3106 | noop = !r; |
87f0e418 | 3107 | |
eef85c4a | 3108 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
15ed3c3a | 3109 | r = unit_add_dependency_hashmap(&other->dependencies, inverse_table[d], u, 0, mask); |
613b411c LP |
3110 | if (r < 0) |
3111 | return r; | |
15ed3c3a | 3112 | if (r) |
5177cb0a | 3113 | noop = false; |
613b411c LP |
3114 | } |
3115 | ||
3116 | if (add_reference) { | |
15ed3c3a | 3117 | r = unit_add_dependency_hashmap(&u->dependencies, UNIT_REFERENCES, other, mask, 0); |
613b411c | 3118 | if (r < 0) |
5de9682c | 3119 | return r; |
15ed3c3a | 3120 | if (r) |
5177cb0a | 3121 | noop = false; |
5de9682c | 3122 | |
15ed3c3a | 3123 | r = unit_add_dependency_hashmap(&other->dependencies, UNIT_REFERENCED_BY, u, 0, mask); |
613b411c | 3124 | if (r < 0) |
701cc384 | 3125 | return r; |
15ed3c3a | 3126 | if (r) |
5177cb0a | 3127 | noop = false; |
613b411c | 3128 | } |
87f0e418 | 3129 | |
5177cb0a RM |
3130 | if (!noop) |
3131 | unit_add_to_dbus_queue(u); | |
15ed3c3a | 3132 | |
87f0e418 LP |
3133 | return 0; |
3134 | } | |
0301abf4 | 3135 | |
eef85c4a | 3136 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
2c966c03 LP |
3137 | int r; |
3138 | ||
3139 | assert(u); | |
3140 | ||
eef85c4a | 3141 | r = unit_add_dependency(u, d, other, add_reference, mask); |
3f3cc397 | 3142 | if (r < 0) |
2c966c03 LP |
3143 | return r; |
3144 | ||
eef85c4a | 3145 | return unit_add_dependency(u, e, other, add_reference, mask); |
2c966c03 LP |
3146 | } |
3147 | ||
23e8c796 | 3148 | static int resolve_template(Unit *u, const char *name, char **buf, const char **ret) { |
7410616c | 3149 | int r; |
9e2f7c11 LP |
3150 | |
3151 | assert(u); | |
23e8c796 | 3152 | assert(name); |
7410616c LP |
3153 | assert(buf); |
3154 | assert(ret); | |
9e2f7c11 | 3155 | |
7410616c LP |
3156 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
3157 | *buf = NULL; | |
3158 | *ret = name; | |
3159 | return 0; | |
9e2f7c11 LP |
3160 | } |
3161 | ||
ac155bb8 | 3162 | if (u->instance) |
7410616c | 3163 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 3164 | else { |
ae018d9b | 3165 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 3166 | |
7410616c LP |
3167 | r = unit_name_to_prefix(u->id, &i); |
3168 | if (r < 0) | |
3169 | return r; | |
9e2f7c11 | 3170 | |
7410616c | 3171 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 3172 | } |
7410616c LP |
3173 | if (r < 0) |
3174 | return r; | |
9e2f7c11 | 3175 | |
7410616c LP |
3176 | *ret = *buf; |
3177 | return 0; | |
9e2f7c11 LP |
3178 | } |
3179 | ||
35d8c19a | 3180 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3181 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
3182 | Unit *other; |
3183 | int r; | |
3184 | ||
9e2f7c11 | 3185 | assert(u); |
35d8c19a | 3186 | assert(name); |
09b6b09f | 3187 | |
23e8c796 | 3188 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3189 | if (r < 0) |
3190 | return r; | |
09b6b09f | 3191 | |
f14d6810 MG |
3192 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3193 | return 0; | |
3194 | ||
35d8c19a | 3195 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
8afbb8e1 LP |
3196 | if (r < 0) |
3197 | return r; | |
9e2f7c11 | 3198 | |
eef85c4a | 3199 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
3200 | } |
3201 | ||
5a724170 | 3202 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3203 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
3204 | Unit *other; |
3205 | int r; | |
2c966c03 LP |
3206 | |
3207 | assert(u); | |
5a724170 | 3208 | assert(name); |
2c966c03 | 3209 | |
23e8c796 | 3210 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3211 | if (r < 0) |
3212 | return r; | |
2c966c03 | 3213 | |
f14d6810 MG |
3214 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3215 | return 0; | |
3216 | ||
5a724170 | 3217 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
3f3cc397 | 3218 | if (r < 0) |
68eda4bd | 3219 | return r; |
2c966c03 | 3220 | |
eef85c4a | 3221 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
3222 | } |
3223 | ||
0301abf4 | 3224 | int set_unit_path(const char *p) { |
0301abf4 | 3225 | /* This is mostly for debug purposes */ |
cbe46ead | 3226 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 3227 | return -errno; |
0301abf4 LP |
3228 | |
3229 | return 0; | |
3230 | } | |
88066b3a | 3231 | |
ea430986 | 3232 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
3233 | assert(u); |
3234 | ||
ac155bb8 | 3235 | if (!u->id) |
04ade7d2 LP |
3236 | return NULL; |
3237 | ||
48899192 | 3238 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
3239 | } |
3240 | ||
4b58153d LP |
3241 | char *unit_dbus_path_invocation_id(Unit *u) { |
3242 | assert(u); | |
3243 | ||
3244 | if (sd_id128_is_null(u->invocation_id)) | |
3245 | return NULL; | |
3246 | ||
3247 | return unit_dbus_path_from_name(u->invocation_id_string); | |
3248 | } | |
3249 | ||
2d3b784d | 3250 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { |
db868d45 ZJS |
3251 | int r; |
3252 | ||
3253 | assert(u); | |
3254 | ||
3255 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
3256 | ||
3257 | if (sd_id128_equal(u->invocation_id, id)) | |
3258 | return 0; | |
3259 | ||
3260 | if (!sd_id128_is_null(u->invocation_id)) | |
3261 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3262 | ||
3263 | if (sd_id128_is_null(id)) { | |
3264 | r = 0; | |
3265 | goto reset; | |
3266 | } | |
3267 | ||
3268 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
3269 | if (r < 0) | |
3270 | goto reset; | |
3271 | ||
3272 | u->invocation_id = id; | |
3273 | sd_id128_to_string(id, u->invocation_id_string); | |
3274 | ||
3275 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3276 | if (r < 0) | |
3277 | goto reset; | |
3278 | ||
3279 | return 0; | |
3280 | ||
3281 | reset: | |
3282 | u->invocation_id = SD_ID128_NULL; | |
3283 | u->invocation_id_string[0] = 0; | |
3284 | return r; | |
3285 | } | |
3286 | ||
d219a2b0 LP |
3287 | int unit_set_slice(Unit *u, Unit *slice, UnitDependencyMask mask) { |
3288 | int r; | |
3289 | ||
d79200e2 LP |
3290 | assert(u); |
3291 | assert(slice); | |
3292 | ||
d219a2b0 LP |
3293 | /* Sets the unit slice if it has not been set before. Is extra careful, to only allow this for units |
3294 | * that actually have a cgroup context. Also, we don't allow to set this for slices (since the parent | |
3295 | * slice is derived from the name). Make sure the unit we set is actually a slice. */ | |
d79200e2 LP |
3296 | |
3297 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3298 | return -EOPNOTSUPP; | |
3299 | ||
3300 | if (u->type == UNIT_SLICE) | |
3301 | return -EINVAL; | |
3302 | ||
102ef982 LP |
3303 | if (unit_active_state(u) != UNIT_INACTIVE) |
3304 | return -EBUSY; | |
3305 | ||
d79200e2 LP |
3306 | if (slice->type != UNIT_SLICE) |
3307 | return -EINVAL; | |
3308 | ||
efdb0237 LP |
3309 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
3310 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
3311 | return -EPERM; | |
3312 | ||
12f64221 | 3313 | if (UNIT_GET_SLICE(u) == slice) |
d79200e2 LP |
3314 | return 0; |
3315 | ||
99e66921 | 3316 | /* Disallow slice changes if @u is already bound to cgroups */ |
12f64221 | 3317 | if (UNIT_GET_SLICE(u) && u->cgroup_realized) |
d79200e2 LP |
3318 | return -EBUSY; |
3319 | ||
d219a2b0 LP |
3320 | r = unit_add_dependency(u, UNIT_IN_SLICE, slice, true, mask); |
3321 | if (r < 0) | |
3322 | return r; | |
3323 | ||
d79200e2 LP |
3324 | return 1; |
3325 | } | |
3326 | ||
3327 | int unit_set_default_slice(Unit *u) { | |
a8833944 | 3328 | const char *slice_name; |
a016b922 LP |
3329 | Unit *slice; |
3330 | int r; | |
3331 | ||
3332 | assert(u); | |
3333 | ||
f14d6810 MG |
3334 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3335 | return 0; | |
3336 | ||
12f64221 | 3337 | if (UNIT_GET_SLICE(u)) |
a016b922 LP |
3338 | return 0; |
3339 | ||
a8833944 LP |
3340 | if (u->instance) { |
3341 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 3342 | |
a8833944 LP |
3343 | /* Implicitly place all instantiated units in their |
3344 | * own per-template slice */ | |
3345 | ||
7410616c LP |
3346 | r = unit_name_to_prefix(u->id, &prefix); |
3347 | if (r < 0) | |
3348 | return r; | |
a8833944 LP |
3349 | |
3350 | /* The prefix is already escaped, but it might include | |
3351 | * "-" which has a special meaning for slice units, | |
3352 | * hence escape it here extra. */ | |
7410616c | 3353 | escaped = unit_name_escape(prefix); |
a8833944 LP |
3354 | if (!escaped) |
3355 | return -ENOMEM; | |
3356 | ||
463d0d15 | 3357 | if (MANAGER_IS_SYSTEM(u->manager)) |
00e7b3c8 | 3358 | slice_name = strjoina("system-", escaped, ".slice"); |
a8833944 | 3359 | else |
7f3b86a4 | 3360 | slice_name = strjoina("app-", escaped, ".slice"); |
5ee24fa0 ZJS |
3361 | |
3362 | } else if (unit_is_extrinsic(u)) | |
3363 | /* Keep all extrinsic units (e.g. perpetual units and swap and mount units in user mode) in | |
3364 | * the root slice. They don't really belong in one of the subslices. */ | |
3365 | slice_name = SPECIAL_ROOT_SLICE; | |
3366 | ||
3367 | else if (MANAGER_IS_SYSTEM(u->manager)) | |
3368 | slice_name = SPECIAL_SYSTEM_SLICE; | |
3369 | else | |
3370 | slice_name = SPECIAL_APP_SLICE; | |
a8833944 LP |
3371 | |
3372 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
3373 | if (r < 0) |
3374 | return r; | |
3375 | ||
d219a2b0 | 3376 | return unit_set_slice(u, slice, UNIT_DEPENDENCY_FILE); |
a016b922 LP |
3377 | } |
3378 | ||
9444b1f2 | 3379 | const char *unit_slice_name(Unit *u) { |
12f64221 | 3380 | Unit *slice; |
9444b1f2 LP |
3381 | assert(u); |
3382 | ||
12f64221 LP |
3383 | slice = UNIT_GET_SLICE(u); |
3384 | if (!slice) | |
9444b1f2 LP |
3385 | return NULL; |
3386 | ||
12f64221 | 3387 | return slice->id; |
9444b1f2 LP |
3388 | } |
3389 | ||
f6ff8c29 | 3390 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 3391 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
3392 | int r; |
3393 | ||
3394 | assert(u); | |
3395 | assert(type); | |
3396 | assert(_found); | |
3397 | ||
7410616c LP |
3398 | r = unit_name_change_suffix(u->id, type, &t); |
3399 | if (r < 0) | |
3400 | return r; | |
3401 | if (unit_has_name(u, t)) | |
3402 | return -EINVAL; | |
f6ff8c29 | 3403 | |
ac155bb8 | 3404 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3405 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3406 | return r; |
3407 | } | |
3408 | ||
bbc29086 | 3409 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
fc67a943 | 3410 | const char *new_owner; |
bbc29086 DM |
3411 | Unit *u = userdata; |
3412 | int r; | |
3413 | ||
3414 | assert(message); | |
3415 | assert(u); | |
3416 | ||
fc67a943 | 3417 | r = sd_bus_message_read(message, "sss", NULL, NULL, &new_owner); |
bbc29086 DM |
3418 | if (r < 0) { |
3419 | bus_log_parse_error(r); | |
3420 | return 0; | |
3421 | } | |
3422 | ||
3423 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3424 | UNIT_VTABLE(u)->bus_name_owner_change(u, empty_to_null(new_owner)); |
a5a8776a MJ |
3425 | |
3426 | return 0; | |
3427 | } | |
3428 | ||
3429 | static int get_name_owner_handler(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
3430 | const sd_bus_error *e; | |
3431 | const char *new_owner; | |
3432 | Unit *u = userdata; | |
3433 | int r; | |
3434 | ||
3435 | assert(message); | |
3436 | assert(u); | |
3437 | ||
3438 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); | |
3439 | ||
a5a8776a | 3440 | e = sd_bus_message_get_error(message); |
a5a8776a | 3441 | if (e) { |
a54654ba LP |
3442 | if (!sd_bus_error_has_name(e, "org.freedesktop.DBus.Error.NameHasNoOwner")) |
3443 | log_unit_error(u, "Unexpected error response from GetNameOwner(): %s", e->message); | |
a5a8776a | 3444 | |
fc67a943 LP |
3445 | new_owner = NULL; |
3446 | } else { | |
3447 | r = sd_bus_message_read(message, "s", &new_owner); | |
3448 | if (r < 0) | |
3449 | return bus_log_parse_error(r); | |
a5a8776a | 3450 | |
fc67a943 LP |
3451 | assert(!isempty(new_owner)); |
3452 | } | |
a5a8776a MJ |
3453 | |
3454 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3455 | UNIT_VTABLE(u)->bus_name_owner_change(u, new_owner); |
bbc29086 DM |
3456 | |
3457 | return 0; | |
3458 | } | |
3459 | ||
9806e87d LP |
3460 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3461 | const char *match; | |
a5b07847 | 3462 | int r; |
bbc29086 | 3463 | |
9806e87d LP |
3464 | assert(u); |
3465 | assert(bus); | |
3466 | assert(name); | |
bbc29086 | 3467 | |
a5b07847 | 3468 | if (u->match_bus_slot || u->get_name_owner_slot) |
bbc29086 DM |
3469 | return -EBUSY; |
3470 | ||
9806e87d | 3471 | match = strjoina("type='signal'," |
81d62103 ZJS |
3472 | "sender='org.freedesktop.DBus'," |
3473 | "path='/org/freedesktop/DBus'," | |
3474 | "interface='org.freedesktop.DBus'," | |
3475 | "member='NameOwnerChanged'," | |
3476 | "arg0='", name, "'"); | |
bbc29086 | 3477 | |
a5b07847 | 3478 | r = sd_bus_add_match_async(bus, &u->match_bus_slot, match, signal_name_owner_changed, NULL, u); |
a5a8776a MJ |
3479 | if (r < 0) |
3480 | return r; | |
3481 | ||
a5b07847 LP |
3482 | r = sd_bus_call_method_async( |
3483 | bus, | |
3484 | &u->get_name_owner_slot, | |
3485 | "org.freedesktop.DBus", | |
3486 | "/org/freedesktop/DBus", | |
3487 | "org.freedesktop.DBus", | |
3488 | "GetNameOwner", | |
3489 | get_name_owner_handler, | |
3490 | u, | |
3491 | "s", name); | |
3492 | if (r < 0) { | |
3493 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3494 | return r; | |
3495 | } | |
3496 | ||
3497 | log_unit_debug(u, "Watching D-Bus name '%s'.", name); | |
3498 | return 0; | |
bbc29086 DM |
3499 | } |
3500 | ||
05e343b7 | 3501 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3502 | int r; |
3503 | ||
05e343b7 LP |
3504 | assert(u); |
3505 | assert(name); | |
3506 | ||
3507 | /* Watch a specific name on the bus. We only support one unit | |
3508 | * watching each name for now. */ | |
3509 | ||
bbc29086 DM |
3510 | if (u->manager->api_bus) { |
3511 | /* If the bus is already available, install the match directly. | |
3512 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3513 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3514 | if (r < 0) |
8ea823b6 | 3515 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3516 | } |
3517 | ||
3518 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3519 | if (r < 0) { | |
3520 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
a5b07847 | 3521 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
bbc29086 DM |
3522 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); |
3523 | } | |
3524 | ||
3525 | return 0; | |
05e343b7 LP |
3526 | } |
3527 | ||
3528 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3529 | assert(u); | |
3530 | assert(name); | |
3531 | ||
8367fea5 | 3532 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3533 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
a5a8776a | 3534 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
05e343b7 LP |
3535 | } |
3536 | ||
d336ba9f | 3537 | int unit_add_node_dependency(Unit *u, const char *what, UnitDependency dep, UnitDependencyMask mask) { |
68eda4bd | 3538 | _cleanup_free_ char *e = NULL; |
44b0d1fd | 3539 | Unit *device; |
6e2ef85b LP |
3540 | int r; |
3541 | ||
3542 | assert(u); | |
3543 | ||
6e2ef85b | 3544 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3545 | if (isempty(what)) |
3546 | return 0; | |
6e2ef85b | 3547 | |
8407a5d0 | 3548 | if (!is_device_path(what)) |
6e2ef85b LP |
3549 | return 0; |
3550 | ||
44b0d1fd | 3551 | /* When device units aren't supported (such as in a container), don't create dependencies on them. */ |
1c2e9646 | 3552 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3553 | return 0; |
3554 | ||
7410616c LP |
3555 | r = unit_name_from_path(what, ".device", &e); |
3556 | if (r < 0) | |
3557 | return r; | |
6e2ef85b | 3558 | |
ac155bb8 | 3559 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3560 | if (r < 0) |
3561 | return r; | |
3562 | ||
ebc8968b FB |
3563 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3564 | dep = UNIT_BINDS_TO; | |
3565 | ||
d336ba9f FB |
3566 | return unit_add_two_dependencies(u, UNIT_AFTER, |
3567 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, | |
3568 | device, true, mask); | |
6e2ef85b | 3569 | } |
a16e1123 | 3570 | |
44b0d1fd LP |
3571 | int unit_add_blockdev_dependency(Unit *u, const char *what, UnitDependencyMask mask) { |
3572 | _cleanup_free_ char *escaped = NULL, *target = NULL; | |
3573 | int r; | |
3574 | ||
3575 | assert(u); | |
3576 | ||
3577 | if (isempty(what)) | |
3578 | return 0; | |
3579 | ||
3580 | if (!path_startswith(what, "/dev/")) | |
3581 | return 0; | |
3582 | ||
3583 | /* If we don't support devices, then also don't bother with blockdev@.target */ | |
3584 | if (!unit_type_supported(UNIT_DEVICE)) | |
3585 | return 0; | |
3586 | ||
3587 | r = unit_name_path_escape(what, &escaped); | |
3588 | if (r < 0) | |
3589 | return r; | |
3590 | ||
3591 | r = unit_name_build("blockdev", escaped, ".target", &target); | |
3592 | if (r < 0) | |
3593 | return r; | |
3594 | ||
3595 | return unit_add_dependency_by_name(u, UNIT_AFTER, target, true, mask); | |
3596 | } | |
3597 | ||
be847e82 | 3598 | int unit_coldplug(Unit *u) { |
05a98afd LP |
3599 | int r = 0, q; |
3600 | char **i; | |
cca098b0 LP |
3601 | |
3602 | assert(u); | |
3603 | ||
f0831ed2 | 3604 | /* Make sure we don't enter a loop, when coldplugging recursively. */ |
f78f265f LP |
3605 | if (u->coldplugged) |
3606 | return 0; | |
3607 | ||
3608 | u->coldplugged = true; | |
3609 | ||
05a98afd LP |
3610 | STRV_FOREACH(i, u->deserialized_refs) { |
3611 | q = bus_unit_track_add_name(u, *i); | |
3612 | if (q < 0 && r >= 0) | |
3613 | r = q; | |
3614 | } | |
3615 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 3616 | |
05a98afd LP |
3617 | if (UNIT_VTABLE(u)->coldplug) { |
3618 | q = UNIT_VTABLE(u)->coldplug(u); | |
3619 | if (q < 0 && r >= 0) | |
3620 | r = q; | |
3621 | } | |
5a6158b6 | 3622 | |
7dbd330c GL |
3623 | if (u->job) { |
3624 | q = job_coldplug(u->job); | |
3625 | if (q < 0 && r >= 0) | |
3626 | r = q; | |
3627 | } | |
3628 | if (u->nop_job) { | |
3629 | q = job_coldplug(u->nop_job); | |
05a98afd LP |
3630 | if (q < 0 && r >= 0) |
3631 | r = q; | |
3632 | } | |
cca098b0 | 3633 | |
05a98afd | 3634 | return r; |
cca098b0 LP |
3635 | } |
3636 | ||
f0831ed2 LP |
3637 | void unit_catchup(Unit *u) { |
3638 | assert(u); | |
3639 | ||
3640 | if (UNIT_VTABLE(u)->catchup) | |
3641 | UNIT_VTABLE(u)->catchup(u); | |
869f52f2 DS |
3642 | |
3643 | unit_cgroup_catchup(u); | |
f0831ed2 LP |
3644 | } |
3645 | ||
ba25d39e | 3646 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3647 | struct stat st; |
3648 | ||
3649 | if (!path) | |
3650 | return false; | |
3651 | ||
77969722 LP |
3652 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3653 | * are never out-of-date. */ | |
3654 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3655 | return false; | |
3656 | ||
21b95806 ZJS |
3657 | if (stat(path, &st) < 0) |
3658 | /* What, cannot access this anymore? */ | |
3659 | return true; | |
3660 | ||
ba25d39e ZJS |
3661 | if (path_masked) |
3662 | /* For masked files check if they are still so */ | |
3663 | return !null_or_empty(&st); | |
3664 | else | |
3a8db9fe | 3665 | /* For non-empty files check the mtime */ |
87ec20ef | 3666 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3667 | |
3668 | return false; | |
3669 | } | |
3670 | ||
45fb0699 | 3671 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
3672 | _cleanup_strv_free_ char **t = NULL; |
3673 | char **path; | |
1b64d026 | 3674 | |
45fb0699 LP |
3675 | assert(u); |
3676 | ||
ba25d39e ZJS |
3677 | /* For unit files, we allow masking… */ |
3678 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3679 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3680 | return true; |
5f4b19f4 | 3681 | |
ba25d39e ZJS |
3682 | /* Source paths should not be masked… */ |
3683 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3684 | return true; |
ae7a7182 | 3685 | |
19a44dfe LR |
3686 | if (u->load_state == UNIT_LOADED) |
3687 | (void) unit_find_dropin_paths(u, &t); | |
ab932a62 LP |
3688 | if (!strv_equal(u->dropin_paths, t)) |
3689 | return true; | |
6d10d308 | 3690 | |
ba25d39e | 3691 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3692 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3693 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3694 | return true; |
21b95806 | 3695 | |
ab932a62 | 3696 | return false; |
45fb0699 LP |
3697 | } |
3698 | ||
fdf20a31 | 3699 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3700 | assert(u); |
3701 | ||
fdf20a31 MM |
3702 | if (UNIT_VTABLE(u)->reset_failed) |
3703 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 | 3704 | |
7bf081a1 | 3705 | ratelimit_reset(&u->start_ratelimit); |
6bf0f408 | 3706 | u->start_limit_hit = false; |
5632e374 LP |
3707 | } |
3708 | ||
a7f241db LP |
3709 | Unit *unit_following(Unit *u) { |
3710 | assert(u); | |
3711 | ||
3712 | if (UNIT_VTABLE(u)->following) | |
3713 | return UNIT_VTABLE(u)->following(u); | |
3714 | ||
3715 | return NULL; | |
3716 | } | |
3717 | ||
31afa0a4 | 3718 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3719 | assert(u); |
3720 | ||
31afa0a4 LP |
3721 | /* This call does check the current state of the unit. It's |
3722 | * hence useful to be called from state change calls of the | |
3723 | * unit itself, where the state isn't updated yet. This is | |
3724 | * different from unit_inactive_or_pending() which checks both | |
3725 | * the current state and for a queued job. */ | |
18ffdfda | 3726 | |
28a2dfe8 | 3727 | return unit_has_job_type(u, JOB_STOP); |
31afa0a4 LP |
3728 | } |
3729 | ||
3730 | bool unit_inactive_or_pending(Unit *u) { | |
3731 | assert(u); | |
3732 | ||
3733 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3734 | |
d956ac29 LP |
3735 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3736 | return true; | |
3737 | ||
31afa0a4 | 3738 | if (unit_stop_pending(u)) |
18ffdfda LP |
3739 | return true; |
3740 | ||
3741 | return false; | |
3742 | } | |
3743 | ||
31afa0a4 | 3744 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3745 | assert(u); |
3746 | ||
f60c2665 | 3747 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3748 | |
3749 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3750 | return true; | |
3751 | ||
ac155bb8 | 3752 | if (u->job && |
3742095b | 3753 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
3754 | return true; |
3755 | ||
3756 | return false; | |
3757 | } | |
3758 | ||
52a12341 YW |
3759 | bool unit_will_restart_default(Unit *u) { |
3760 | assert(u); | |
3761 | ||
28a2dfe8 | 3762 | return unit_has_job_type(u, JOB_START); |
52a12341 YW |
3763 | } |
3764 | ||
deb4e708 MK |
3765 | bool unit_will_restart(Unit *u) { |
3766 | assert(u); | |
3767 | ||
3768 | if (!UNIT_VTABLE(u)->will_restart) | |
3769 | return false; | |
3770 | ||
3771 | return UNIT_VTABLE(u)->will_restart(u); | |
3772 | } | |
3773 | ||
718db961 | 3774 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3775 | assert(u); |
3776 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 3777 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 3778 | |
8a0867d6 | 3779 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3780 | return -EOPNOTSUPP; |
8a0867d6 | 3781 | |
c74f17d9 | 3782 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3783 | } |
3784 | ||
82659fd7 | 3785 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
af4fa99d | 3786 | _cleanup_set_free_ Set *pid_set = NULL; |
82659fd7 LP |
3787 | int r; |
3788 | ||
d5099efc | 3789 | pid_set = set_new(NULL); |
82659fd7 LP |
3790 | if (!pid_set) |
3791 | return NULL; | |
3792 | ||
3793 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3794 | if (main_pid > 0) { | |
fea72cc0 | 3795 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 | 3796 | if (r < 0) |
95f14a3e | 3797 | return NULL; |
82659fd7 LP |
3798 | } |
3799 | ||
3800 | if (control_pid > 0) { | |
fea72cc0 | 3801 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 | 3802 | if (r < 0) |
95f14a3e | 3803 | return NULL; |
82659fd7 LP |
3804 | } |
3805 | ||
95f14a3e | 3806 | return TAKE_PTR(pid_set); |
82659fd7 LP |
3807 | } |
3808 | ||
d9911002 LP |
3809 | static int kill_common_log(pid_t pid, int signo, void *userdata) { |
3810 | _cleanup_free_ char *comm = NULL; | |
3811 | Unit *u = userdata; | |
3812 | ||
3813 | assert(u); | |
3814 | ||
3815 | (void) get_process_comm(pid, &comm); | |
3816 | log_unit_info(u, "Sending signal SIG%s to process " PID_FMT " (%s) on client request.", | |
3817 | signal_to_string(signo), pid, strna(comm)); | |
3818 | ||
3819 | return 1; | |
3820 | } | |
3821 | ||
d91c34f2 LP |
3822 | int unit_kill_common( |
3823 | Unit *u, | |
3824 | KillWho who, | |
3825 | int signo, | |
3826 | pid_t main_pid, | |
3827 | pid_t control_pid, | |
718db961 | 3828 | sd_bus_error *error) { |
d91c34f2 | 3829 | |
814cc562 | 3830 | int r = 0; |
ac5e3a50 | 3831 | bool killed = false; |
814cc562 | 3832 | |
8aff7ac4 LP |
3833 | /* This is the common implementation for explicit user-requested killing of unit processes, shared by |
3834 | * various unit types. Do not confuse with unit_kill_context(), which is what we use when we want to | |
3835 | * stop a service ourselves. */ | |
3836 | ||
ac5e3a50 | 3837 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3838 | if (main_pid < 0) |
7358dc02 | 3839 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
8aff7ac4 | 3840 | if (main_pid == 0) |
7358dc02 | 3841 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3842 | } |
3843 | ||
ac5e3a50 | 3844 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3845 | if (control_pid < 0) |
7358dc02 | 3846 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
8aff7ac4 | 3847 | if (control_pid == 0) |
7358dc02 | 3848 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3849 | } |
3850 | ||
ac5e3a50 JS |
3851 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3852 | if (control_pid > 0) { | |
d9911002 LP |
3853 | _cleanup_free_ char *comm = NULL; |
3854 | (void) get_process_comm(control_pid, &comm); | |
3855 | ||
3856 | if (kill(control_pid, signo) < 0) { | |
3857 | /* Report this failure both to the logs and to the client */ | |
3858 | sd_bus_error_set_errnof( | |
3859 | error, errno, | |
3860 | "Failed to send signal SIG%s to control process " PID_FMT " (%s): %m", | |
3861 | signal_to_string(signo), control_pid, strna(comm)); | |
3862 | r = log_unit_warning_errno( | |
3863 | u, errno, | |
3864 | "Failed to send signal SIG%s to control process " PID_FMT " (%s) on client request: %m", | |
3865 | signal_to_string(signo), control_pid, strna(comm)); | |
3866 | } else { | |
3867 | log_unit_info(u, "Sent signal SIG%s to control process " PID_FMT " (%s) on client request.", | |
3868 | signal_to_string(signo), control_pid, strna(comm)); | |
ac5e3a50 | 3869 | killed = true; |
d9911002 | 3870 | } |
ac5e3a50 | 3871 | } |
814cc562 | 3872 | |
ac5e3a50 JS |
3873 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3874 | if (main_pid > 0) { | |
d9911002 LP |
3875 | _cleanup_free_ char *comm = NULL; |
3876 | (void) get_process_comm(main_pid, &comm); | |
3877 | ||
3878 | if (kill(main_pid, signo) < 0) { | |
3879 | if (r == 0) | |
3880 | sd_bus_error_set_errnof( | |
3881 | error, errno, | |
3882 | "Failed to send signal SIG%s to main process " PID_FMT " (%s): %m", | |
3883 | signal_to_string(signo), main_pid, strna(comm)); | |
3884 | ||
3885 | r = log_unit_warning_errno( | |
3886 | u, errno, | |
3887 | "Failed to send signal SIG%s to main process " PID_FMT " (%s) on client request: %m", | |
3888 | signal_to_string(signo), main_pid, strna(comm)); | |
3889 | } else { | |
3890 | log_unit_info(u, "Sent signal SIG%s to main process " PID_FMT " (%s) on client request.", | |
3891 | signal_to_string(signo), main_pid, strna(comm)); | |
ac5e3a50 | 3892 | killed = true; |
d9911002 | 3893 | } |
ac5e3a50 | 3894 | } |
814cc562 | 3895 | |
ac5e3a50 | 3896 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3897 | _cleanup_set_free_ Set *pid_set = NULL; |
3898 | int q; | |
3899 | ||
82659fd7 LP |
3900 | /* Exclude the main/control pids from being killed via the cgroup */ |
3901 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 | 3902 | if (!pid_set) |
d9911002 LP |
3903 | return log_oom(); |
3904 | ||
3905 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, kill_common_log, u); | |
3906 | if (q < 0) { | |
3907 | if (!IN_SET(q, -ESRCH, -ENOENT)) { | |
3908 | if (r == 0) | |
3909 | sd_bus_error_set_errnof( | |
3910 | error, q, | |
3911 | "Failed to send signal SIG%s to auxiliary processes: %m", | |
3912 | signal_to_string(signo)); | |
3913 | ||
3914 | r = log_unit_warning_errno( | |
3915 | u, q, | |
3916 | "Failed to send signal SIG%s to auxiliary processes on client request: %m", | |
3917 | signal_to_string(signo)); | |
3918 | } | |
3919 | } else | |
ac5e3a50 | 3920 | killed = true; |
814cc562 MS |
3921 | } |
3922 | ||
2ae0508e LP |
3923 | /* If the "fail" versions of the operation are requested, then complain if the set of processes we killed is empty */ |
3924 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL, KILL_MAIN_FAIL)) | |
3925 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No matching processes to kill"); | |
ac5e3a50 | 3926 | |
814cc562 MS |
3927 | return r; |
3928 | } | |
3929 | ||
6210e7fc LP |
3930 | int unit_following_set(Unit *u, Set **s) { |
3931 | assert(u); | |
3932 | assert(s); | |
3933 | ||
3934 | if (UNIT_VTABLE(u)->following_set) | |
3935 | return UNIT_VTABLE(u)->following_set(u, s); | |
3936 | ||
3937 | *s = NULL; | |
3938 | return 0; | |
3939 | } | |
3940 | ||
a4375746 | 3941 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
3942 | int r; |
3943 | ||
a4375746 LP |
3944 | assert(u); |
3945 | ||
0ec0deaa LP |
3946 | if (u->unit_file_state < 0 && u->fragment_path) { |
3947 | r = unit_file_get_state( | |
463d0d15 | 3948 | u->manager->unit_file_scope, |
0ec0deaa | 3949 | NULL, |
9ea3a0e7 | 3950 | u->id, |
0ec0deaa LP |
3951 | &u->unit_file_state); |
3952 | if (r < 0) | |
3953 | u->unit_file_state = UNIT_FILE_BAD; | |
3954 | } | |
a4375746 | 3955 | |
ac155bb8 | 3956 | return u->unit_file_state; |
a4375746 LP |
3957 | } |
3958 | ||
d2dc52db LP |
3959 | int unit_get_unit_file_preset(Unit *u) { |
3960 | assert(u); | |
3961 | ||
3962 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3963 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 3964 | u->manager->unit_file_scope, |
0ec0deaa | 3965 | NULL, |
8f7b2566 ZJS |
3966 | basename(u->fragment_path), |
3967 | NULL); | |
d2dc52db LP |
3968 | |
3969 | return u->unit_file_preset; | |
3970 | } | |
3971 | ||
7f7d01ed | 3972 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 3973 | assert(ref); |
7f7d01ed ZJS |
3974 | assert(source); |
3975 | assert(target); | |
57020a3a | 3976 | |
7f7d01ed | 3977 | if (ref->target) |
57020a3a LP |
3978 | unit_ref_unset(ref); |
3979 | ||
7f7d01ed ZJS |
3980 | ref->source = source; |
3981 | ref->target = target; | |
3982 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
3983 | return target; | |
57020a3a LP |
3984 | } |
3985 | ||
3986 | void unit_ref_unset(UnitRef *ref) { | |
3987 | assert(ref); | |
3988 | ||
7f7d01ed | 3989 | if (!ref->target) |
57020a3a LP |
3990 | return; |
3991 | ||
b75102e5 LP |
3992 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
3993 | * be unreferenced now. */ | |
7f7d01ed | 3994 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 3995 | |
7f7d01ed ZJS |
3996 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
3997 | ref->source = ref->target = NULL; | |
57020a3a LP |
3998 | } |
3999 | ||
29206d46 LP |
4000 | static int user_from_unit_name(Unit *u, char **ret) { |
4001 | ||
4002 | static const uint8_t hash_key[] = { | |
4003 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
4004 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
4005 | }; | |
4006 | ||
4007 | _cleanup_free_ char *n = NULL; | |
4008 | int r; | |
4009 | ||
4010 | r = unit_name_to_prefix(u->id, &n); | |
4011 | if (r < 0) | |
4012 | return r; | |
4013 | ||
7a8867ab | 4014 | if (valid_user_group_name(n, 0)) { |
ae2a15bc | 4015 | *ret = TAKE_PTR(n); |
29206d46 LP |
4016 | return 0; |
4017 | } | |
4018 | ||
4019 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
4020 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
4021 | return -ENOMEM; | |
4022 | ||
4023 | return 0; | |
4024 | } | |
4025 | ||
598459ce LP |
4026 | int unit_patch_contexts(Unit *u) { |
4027 | CGroupContext *cc; | |
4028 | ExecContext *ec; | |
cba6e062 LP |
4029 | int r; |
4030 | ||
e06c73cc | 4031 | assert(u); |
e06c73cc | 4032 | |
598459ce LP |
4033 | /* Patch in the manager defaults into the exec and cgroup |
4034 | * contexts, _after_ the rest of the settings have been | |
4035 | * initialized */ | |
085afe36 | 4036 | |
598459ce LP |
4037 | ec = unit_get_exec_context(u); |
4038 | if (ec) { | |
4039 | /* This only copies in the ones that need memory */ | |
12375b95 | 4040 | for (unsigned i = 0; i < _RLIMIT_MAX; i++) |
598459ce LP |
4041 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { |
4042 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
4043 | if (!ec->rlimit[i]) | |
4044 | return -ENOMEM; | |
4045 | } | |
4046 | ||
463d0d15 | 4047 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4048 | !ec->working_directory) { |
4049 | ||
4050 | r = get_home_dir(&ec->working_directory); | |
4051 | if (r < 0) | |
4052 | return r; | |
4c08c824 LP |
4053 | |
4054 | /* Allow user services to run, even if the | |
4055 | * home directory is missing */ | |
4056 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4057 | } |
4058 | ||
598459ce | 4059 | if (ec->private_devices) |
2cd0a735 | 4060 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4061 | |
4062 | if (ec->protect_kernel_modules) | |
4063 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 | 4064 | |
84703040 KK |
4065 | if (ec->protect_kernel_logs) |
4066 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYSLOG); | |
4067 | ||
fc64760d KK |
4068 | if (ec->protect_clock) |
4069 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_SYS_TIME) | (UINT64_C(1) << CAP_WAKE_ALARM)); | |
4070 | ||
29206d46 LP |
4071 | if (ec->dynamic_user) { |
4072 | if (!ec->user) { | |
4073 | r = user_from_unit_name(u, &ec->user); | |
4074 | if (r < 0) | |
4075 | return r; | |
4076 | } | |
4077 | ||
4078 | if (!ec->group) { | |
4079 | ec->group = strdup(ec->user); | |
4080 | if (!ec->group) | |
4081 | return -ENOMEM; | |
4082 | } | |
4083 | ||
bf65b7e0 LP |
4084 | /* If the dynamic user option is on, let's make sure that the unit can't leave its |
4085 | * UID/GID around in the file system or on IPC objects. Hence enforce a strict | |
4086 | * sandbox. */ | |
63bb64a0 | 4087 | |
29206d46 | 4088 | ec->private_tmp = true; |
00d9ef85 | 4089 | ec->remove_ipc = true; |
63bb64a0 LP |
4090 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4091 | if (ec->protect_home == PROTECT_HOME_NO) | |
4092 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
bf65b7e0 LP |
4093 | |
4094 | /* Make sure this service can neither benefit from SUID/SGID binaries nor create | |
4095 | * them. */ | |
4096 | ec->no_new_privileges = true; | |
4097 | ec->restrict_suid_sgid = true; | |
29206d46 | 4098 | } |
cba6e062 LP |
4099 | } |
4100 | ||
598459ce | 4101 | cc = unit_get_cgroup_context(u); |
fe65e88b | 4102 | if (cc && ec) { |
f513e420 | 4103 | |
fe65e88b | 4104 | if (ec->private_devices && |
084870f9 ZJS |
4105 | cc->device_policy == CGROUP_DEVICE_POLICY_AUTO) |
4106 | cc->device_policy = CGROUP_DEVICE_POLICY_CLOSED; | |
fe65e88b | 4107 | |
b3d13314 | 4108 | if ((ec->root_image || !LIST_IS_EMPTY(ec->mount_images)) && |
084870f9 | 4109 | (cc->device_policy != CGROUP_DEVICE_POLICY_AUTO || cc->device_allow)) { |
0cffae95 | 4110 | const char *p; |
fe65e88b | 4111 | |
b3d13314 | 4112 | /* When RootImage= or MountImages= is specified, the following devices are touched. */ |
0cffae95 LB |
4113 | FOREACH_STRING(p, "/dev/loop-control", "/dev/mapper/control") { |
4114 | r = cgroup_add_device_allow(cc, p, "rw"); | |
4115 | if (r < 0) | |
4116 | return r; | |
4117 | } | |
4118 | FOREACH_STRING(p, "block-loop", "block-blkext", "block-device-mapper") { | |
4119 | r = cgroup_add_device_allow(cc, p, "rwm"); | |
4120 | if (r < 0) | |
4121 | return r; | |
4122 | } | |
867af728 | 4123 | |
0cffae95 LB |
4124 | /* Make sure "block-loop" can be resolved, i.e. make sure "loop" shows up in /proc/devices. |
4125 | * Same for mapper and verity. */ | |
4126 | FOREACH_STRING(p, "modprobe@loop.service", "modprobe@dm_mod.service", "modprobe@dm_verity.service") { | |
4127 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, p, true, UNIT_DEPENDENCY_FILE); | |
4128 | if (r < 0) | |
4129 | return r; | |
4130 | } | |
fe65e88b | 4131 | } |
fc64760d KK |
4132 | |
4133 | if (ec->protect_clock) { | |
4134 | r = cgroup_add_device_allow(cc, "char-rtc", "r"); | |
4135 | if (r < 0) | |
4136 | return r; | |
4137 | } | |
598459ce | 4138 | } |
f1660f96 | 4139 | |
cba6e062 | 4140 | return 0; |
e06c73cc LP |
4141 | } |
4142 | ||
c2503e35 | 4143 | ExecContext *unit_get_exec_context(const Unit *u) { |
3ef63c31 LP |
4144 | size_t offset; |
4145 | assert(u); | |
4146 | ||
598459ce LP |
4147 | if (u->type < 0) |
4148 | return NULL; | |
4149 | ||
3ef63c31 LP |
4150 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4151 | if (offset <= 0) | |
4152 | return NULL; | |
4153 | ||
4154 | return (ExecContext*) ((uint8_t*) u + offset); | |
4155 | } | |
4156 | ||
718db961 LP |
4157 | KillContext *unit_get_kill_context(Unit *u) { |
4158 | size_t offset; | |
4159 | assert(u); | |
4160 | ||
598459ce LP |
4161 | if (u->type < 0) |
4162 | return NULL; | |
4163 | ||
718db961 LP |
4164 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4165 | if (offset <= 0) | |
4166 | return NULL; | |
4167 | ||
4168 | return (KillContext*) ((uint8_t*) u + offset); | |
4169 | } | |
4170 | ||
4ad49000 LP |
4171 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4172 | size_t offset; | |
4173 | ||
598459ce LP |
4174 | if (u->type < 0) |
4175 | return NULL; | |
4176 | ||
4ad49000 LP |
4177 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4178 | if (offset <= 0) | |
4179 | return NULL; | |
4180 | ||
4181 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4182 | } | |
4183 | ||
613b411c LP |
4184 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4185 | size_t offset; | |
4186 | ||
598459ce LP |
4187 | if (u->type < 0) |
4188 | return NULL; | |
4189 | ||
613b411c LP |
4190 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4191 | if (offset <= 0) | |
4192 | return NULL; | |
4193 | ||
4194 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4195 | } | |
4196 | ||
2e59b241 | 4197 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4198 | assert(u); |
4199 | ||
2e59b241 | 4200 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4201 | return NULL; |
4202 | ||
39591351 LP |
4203 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4204 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4205 | |
2e59b241 | 4206 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4207 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4208 | |
2e59b241 LP |
4209 | if (flags & UNIT_RUNTIME) |
4210 | return u->manager->lookup_paths.runtime_control; | |
4211 | ||
39591351 | 4212 | return NULL; |
71645aca LP |
4213 | } |
4214 | ||
2e59b241 LP |
4215 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4216 | char *ret = NULL; | |
4217 | ||
4218 | if (!s) | |
4219 | return NULL; | |
4220 | ||
4221 | /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated | |
4222 | * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is | |
4223 | * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly | |
4224 | * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is | |
4225 | * not specified, then the return value always needs to be freed. Callers can use this to optimize memory | |
4226 | * allocations. */ | |
4227 | ||
4228 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
4229 | ret = specifier_escape(s); | |
4230 | if (!ret) | |
4231 | return NULL; | |
4232 | ||
4233 | s = ret; | |
4234 | } | |
4235 | ||
4236 | if (flags & UNIT_ESCAPE_C) { | |
4237 | char *a; | |
4238 | ||
4239 | a = cescape(s); | |
4240 | free(ret); | |
4241 | if (!a) | |
4242 | return NULL; | |
4243 | ||
4244 | ret = a; | |
4245 | } | |
4246 | ||
4247 | if (buf) { | |
4248 | *buf = ret; | |
4249 | return ret ?: (char*) s; | |
4250 | } | |
4251 | ||
4252 | return ret ?: strdup(s); | |
4253 | } | |
4254 | ||
4255 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4256 | _cleanup_free_ char *result = NULL; | |
319a4f4b | 4257 | size_t n = 0; |
ae2a15bc | 4258 | char **i; |
2e59b241 LP |
4259 | |
4260 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a | |
4261 | * way suitable for ExecStart= stanzas */ | |
4262 | ||
4263 | STRV_FOREACH(i, l) { | |
4264 | _cleanup_free_ char *buf = NULL; | |
4265 | const char *p; | |
4266 | size_t a; | |
4267 | char *q; | |
4268 | ||
4269 | p = unit_escape_setting(*i, flags, &buf); | |
4270 | if (!p) | |
4271 | return NULL; | |
4272 | ||
4273 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
319a4f4b | 4274 | if (!GREEDY_REALLOC(result, n + a + 1)) |
2e59b241 LP |
4275 | return NULL; |
4276 | ||
4277 | q = result + n; | |
4278 | if (n > 0) | |
4279 | *(q++) = ' '; | |
4280 | ||
4281 | *(q++) = '"'; | |
4282 | q = stpcpy(q, p); | |
4283 | *(q++) = '"'; | |
4284 | ||
4285 | n += a; | |
4286 | } | |
4287 | ||
319a4f4b | 4288 | if (!GREEDY_REALLOC(result, n + 1)) |
2e59b241 LP |
4289 | return NULL; |
4290 | ||
4291 | result[n] = 0; | |
4292 | ||
ae2a15bc | 4293 | return TAKE_PTR(result); |
2e59b241 LP |
4294 | } |
4295 | ||
4296 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4297 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4298 | const char *dir, *wrapped; |
26d04f86 | 4299 | int r; |
71645aca LP |
4300 | |
4301 | assert(u); | |
2e59b241 LP |
4302 | assert(name); |
4303 | assert(data); | |
4304 | ||
4305 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4306 | return 0; | |
4307 | ||
4308 | data = unit_escape_setting(data, flags, &escaped); | |
4309 | if (!data) | |
4310 | return -ENOMEM; | |
4311 | ||
4312 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4313 | * previous section header is the same */ | |
4314 | ||
4315 | if (flags & UNIT_PRIVATE) { | |
4316 | if (!UNIT_VTABLE(u)->private_section) | |
4317 | return -EINVAL; | |
4318 | ||
4319 | if (!u->transient_file || u->last_section_private < 0) | |
4320 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4321 | else if (u->last_section_private == 0) | |
4322 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4323 | } else { | |
4324 | if (!u->transient_file || u->last_section_private < 0) | |
4325 | data = strjoina("[Unit]\n", data); | |
4326 | else if (u->last_section_private > 0) | |
4327 | data = strjoina("\n[Unit]\n", data); | |
4328 | } | |
71645aca | 4329 | |
4f4afc88 LP |
4330 | if (u->transient_file) { |
4331 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4332 | * write to the transient unit file. */ | |
4333 | fputs(data, u->transient_file); | |
4f4afc88 | 4334 | |
2e59b241 LP |
4335 | if (!endswith(data, "\n")) |
4336 | fputc('\n', u->transient_file); | |
4337 | ||
4338 | /* Remember which section we wrote this entry to */ | |
4339 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4340 | return 0; |
2e59b241 | 4341 | } |
8e2af478 | 4342 | |
2e59b241 | 4343 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4344 | if (!dir) |
4345 | return -EINVAL; | |
71645aca | 4346 | |
2a9a6f8a | 4347 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4348 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4349 | data, |
4350 | "\n"); | |
e20b2a86 | 4351 | |
815b09d3 | 4352 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4353 | if (r < 0) |
4354 | return r; | |
4355 | ||
45639f1b | 4356 | (void) mkdir_p_label(p, 0755); |
4dba44a5 ZJS |
4357 | |
4358 | /* Make sure the drop-in dir is registered in our path cache. This way we don't need to stupidly | |
4359 | * recreate the cache after every drop-in we write. */ | |
4360 | if (u->manager->unit_path_cache) { | |
be327321 | 4361 | r = set_put_strdup(&u->manager->unit_path_cache, p); |
4dba44a5 ZJS |
4362 | if (r < 0) |
4363 | return r; | |
4364 | } | |
4365 | ||
2a9a6f8a | 4366 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4367 | if (r < 0) |
4368 | return r; | |
4369 | ||
815b09d3 | 4370 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4371 | if (r < 0) |
4372 | return r; | |
815b09d3 | 4373 | q = NULL; |
adb76a70 | 4374 | |
adb76a70 WC |
4375 | strv_uniq(u->dropin_paths); |
4376 | ||
4377 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4378 | ||
4379 | return 0; | |
26d04f86 | 4380 | } |
71645aca | 4381 | |
2e59b241 | 4382 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4383 | _cleanup_free_ char *p = NULL; |
4384 | va_list ap; | |
4385 | int r; | |
4386 | ||
4387 | assert(u); | |
4388 | assert(name); | |
4389 | assert(format); | |
4390 | ||
2e59b241 | 4391 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4392 | return 0; |
4393 | ||
4394 | va_start(ap, format); | |
4395 | r = vasprintf(&p, format, ap); | |
4396 | va_end(ap); | |
4397 | ||
4398 | if (r < 0) | |
4399 | return -ENOMEM; | |
4400 | ||
2e59b241 | 4401 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4402 | } |
71645aca | 4403 | |
c2756a68 | 4404 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4405 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4406 | FILE *f; |
4f4afc88 | 4407 | |
c2756a68 LP |
4408 | assert(u); |
4409 | ||
3f5e8115 LP |
4410 | if (!UNIT_VTABLE(u)->can_transient) |
4411 | return -EOPNOTSUPP; | |
4412 | ||
45639f1b LP |
4413 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4414 | ||
657ee2d8 | 4415 | path = path_join(u->manager->lookup_paths.transient, u->id); |
4f4afc88 LP |
4416 | if (!path) |
4417 | return -ENOMEM; | |
4418 | ||
4419 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4420 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4421 | ||
78e334b5 | 4422 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 4423 | f = fopen(path, "we"); |
0126c8f3 | 4424 | if (!f) |
78e334b5 | 4425 | return -errno; |
4f4afc88 LP |
4426 | } |
4427 | ||
0126c8f3 | 4428 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4429 | u->transient_file = f; |
4430 | ||
0126c8f3 | 4431 | free_and_replace(u->fragment_path, path); |
7c65093a | 4432 | |
7c65093a LP |
4433 | u->source_path = mfree(u->source_path); |
4434 | u->dropin_paths = strv_free(u->dropin_paths); | |
4435 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4436 | ||
4f4afc88 LP |
4437 | u->load_state = UNIT_STUB; |
4438 | u->load_error = 0; | |
4439 | u->transient = true; | |
4440 | ||
7c65093a LP |
4441 | unit_add_to_dbus_queue(u); |
4442 | unit_add_to_gc_queue(u); | |
c2756a68 | 4443 | |
4f4afc88 LP |
4444 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4445 | u->transient_file); | |
4446 | ||
3f5e8115 | 4447 | return 0; |
c2756a68 LP |
4448 | } |
4449 | ||
c53d2d54 | 4450 | static int log_kill(pid_t pid, int sig, void *userdata) { |
1d98fef1 LP |
4451 | _cleanup_free_ char *comm = NULL; |
4452 | ||
4453 | (void) get_process_comm(pid, &comm); | |
4454 | ||
4455 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4456 | only, like for example systemd's own PAM stub process. */ | |
4457 | if (comm && comm[0] == '(') | |
c53d2d54 | 4458 | return 0; |
1d98fef1 LP |
4459 | |
4460 | log_unit_notice(userdata, | |
4461 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4462 | pid, | |
4463 | strna(comm), | |
4464 | signal_to_string(sig)); | |
c53d2d54 DB |
4465 | |
4466 | return 1; | |
1d98fef1 LP |
4467 | } |
4468 | ||
4ab1670f | 4469 | static int operation_to_signal(const KillContext *c, KillOperation k, bool *noteworthy) { |
1d98fef1 LP |
4470 | assert(c); |
4471 | ||
4472 | switch (k) { | |
4473 | ||
4474 | case KILL_TERMINATE: | |
4475 | case KILL_TERMINATE_AND_LOG: | |
4ab1670f | 4476 | *noteworthy = false; |
1d98fef1 LP |
4477 | return c->kill_signal; |
4478 | ||
a232ebcc | 4479 | case KILL_RESTART: |
4ab1670f | 4480 | *noteworthy = false; |
a232ebcc ZJS |
4481 | return restart_kill_signal(c); |
4482 | ||
1d98fef1 | 4483 | case KILL_KILL: |
4ab1670f | 4484 | *noteworthy = true; |
fbb48d4c | 4485 | return c->final_kill_signal; |
1d98fef1 | 4486 | |
c87700a1 | 4487 | case KILL_WATCHDOG: |
4ab1670f | 4488 | *noteworthy = true; |
c87700a1 | 4489 | return c->watchdog_signal; |
1d98fef1 LP |
4490 | |
4491 | default: | |
04499a70 | 4492 | assert_not_reached(); |
1d98fef1 LP |
4493 | } |
4494 | } | |
4495 | ||
cd2086fe LP |
4496 | int unit_kill_context( |
4497 | Unit *u, | |
4498 | KillContext *c, | |
db2cb23b | 4499 | KillOperation k, |
cd2086fe LP |
4500 | pid_t main_pid, |
4501 | pid_t control_pid, | |
4502 | bool main_pid_alien) { | |
4503 | ||
1d98fef1 | 4504 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4505 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4506 | int sig, r; |
cd2086fe LP |
4507 | |
4508 | assert(u); | |
4509 | assert(c); | |
4510 | ||
8aff7ac4 LP |
4511 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. Returns > 0 |
4512 | * if we killed something worth waiting for, 0 otherwise. Do not confuse with unit_kill_common() | |
4513 | * which is used for user-requested killing of unit processes. */ | |
1d98fef1 | 4514 | |
cd2086fe LP |
4515 | if (c->kill_mode == KILL_NONE) |
4516 | return 0; | |
4517 | ||
4ab1670f ZJS |
4518 | bool noteworthy; |
4519 | sig = operation_to_signal(c, k, ¬eworthy); | |
4520 | if (noteworthy) | |
4521 | log_func = log_kill; | |
1d98fef1 LP |
4522 | |
4523 | send_sighup = | |
4524 | c->send_sighup && | |
4525 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4526 | sig != SIGHUP; | |
4527 | ||
cd2086fe | 4528 | if (main_pid > 0) { |
1d98fef1 LP |
4529 | if (log_func) |
4530 | log_func(main_pid, sig, u); | |
cd2086fe | 4531 | |
1d98fef1 | 4532 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4533 | if (r < 0 && r != -ESRCH) { |
4534 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4535 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 4536 | |
b821a397 | 4537 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 4538 | } else { |
bc6aed7b LP |
4539 | if (!main_pid_alien) |
4540 | wait_for_exit = true; | |
82659fd7 | 4541 | |
1d98fef1 | 4542 | if (r != -ESRCH && send_sighup) |
d0667321 | 4543 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 4544 | } |
cd2086fe LP |
4545 | } |
4546 | ||
4547 | if (control_pid > 0) { | |
1d98fef1 LP |
4548 | if (log_func) |
4549 | log_func(control_pid, sig, u); | |
cd2086fe | 4550 | |
1d98fef1 | 4551 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4552 | if (r < 0 && r != -ESRCH) { |
4553 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4554 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 4555 | |
b821a397 | 4556 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 4557 | } else { |
cd2086fe | 4558 | wait_for_exit = true; |
82659fd7 | 4559 | |
1d98fef1 | 4560 | if (r != -ESRCH && send_sighup) |
d0667321 | 4561 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 4562 | } |
cd2086fe LP |
4563 | } |
4564 | ||
b821a397 LP |
4565 | if (u->cgroup_path && |
4566 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4567 | _cleanup_set_free_ Set *pid_set = NULL; |
4568 | ||
82659fd7 LP |
4569 | /* Exclude the main/control pids from being killed via the cgroup */ |
4570 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4571 | if (!pid_set) |
4572 | return -ENOMEM; | |
4573 | ||
1d98fef1 LP |
4574 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4575 | sig, | |
4576 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4577 | pid_set, | |
4578 | log_func, u); | |
cd2086fe | 4579 | if (r < 0) { |
4c701096 | 4580 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
6178e2f8 | 4581 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", empty_to_root(u->cgroup_path)); |
b821a397 | 4582 | |
82659fd7 | 4583 | } else if (r > 0) { |
bc6aed7b | 4584 | |
1d9cc876 LP |
4585 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4586 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
4587 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
4588 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
4589 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
4590 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 4591 | |
c22800e4 | 4592 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 4593 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 4594 | wait_for_exit = true; |
58ea275a | 4595 | |
1d98fef1 | 4596 | if (send_sighup) { |
82659fd7 LP |
4597 | set_free(pid_set); |
4598 | ||
4599 | pid_set = unit_pid_set(main_pid, control_pid); | |
4600 | if (!pid_set) | |
4601 | return -ENOMEM; | |
4602 | ||
c8aa4b5b LP |
4603 | (void) cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4604 | SIGHUP, | |
4605 | CGROUP_IGNORE_SELF, | |
4606 | pid_set, | |
4607 | NULL, NULL); | |
82659fd7 LP |
4608 | } |
4609 | } | |
cd2086fe LP |
4610 | } |
4611 | ||
4612 | return wait_for_exit; | |
4613 | } | |
4614 | ||
eef85c4a | 4615 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
a57f7e2c LP |
4616 | int r; |
4617 | ||
4618 | assert(u); | |
4619 | assert(path); | |
4620 | ||
ac19bdd0 ZJS |
4621 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these |
4622 | * paths in the unit (from the path to the UnitDependencyInfo structure indicating how to the | |
4623 | * dependency came to be). However, we build a prefix table for all possible prefixes so that new | |
4624 | * appearing mount units can easily determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4625 | |
70b64bd3 ZJS |
4626 | if (!path_is_absolute(path)) |
4627 | return -EINVAL; | |
4628 | ||
ac19bdd0 ZJS |
4629 | if (hashmap_contains(u->requires_mounts_for, path)) /* Exit quickly if the path is already covered. */ |
4630 | return 0; | |
eef85c4a | 4631 | |
ac19bdd0 | 4632 | _cleanup_free_ char *p = strdup(path); |
a57f7e2c LP |
4633 | if (!p) |
4634 | return -ENOMEM; | |
4635 | ||
ac19bdd0 ZJS |
4636 | /* Use the canonical form of the path as the stored key. We call path_is_normalized() |
4637 | * only after simplification, since path_is_normalized() rejects paths with '.'. | |
4638 | * path_is_normalized() also verifies that the path fits in PATH_MAX. */ | |
4ff361cc | 4639 | path = path_simplify(p); |
a57f7e2c | 4640 | |
ca8700e9 | 4641 | if (!path_is_normalized(path)) |
a57f7e2c | 4642 | return -EPERM; |
a57f7e2c | 4643 | |
ac19bdd0 | 4644 | UnitDependencyInfo di = { |
eef85c4a LP |
4645 | .origin_mask = mask |
4646 | }; | |
4647 | ||
ac19bdd0 | 4648 | r = hashmap_ensure_put(&u->requires_mounts_for, &path_hash_ops, p, di.data); |
ca8700e9 | 4649 | if (r < 0) |
a57f7e2c | 4650 | return r; |
ac19bdd0 ZJS |
4651 | assert(r > 0); |
4652 | TAKE_PTR(p); /* path remains a valid pointer to the string stored in the hashmap */ | |
a57f7e2c | 4653 | |
4cb06c59 | 4654 | char prefix[strlen(path) + 1]; |
ca8700e9 | 4655 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
a57f7e2c LP |
4656 | Set *x; |
4657 | ||
4658 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4659 | if (!x) { | |
ca8700e9 | 4660 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 4661 | |
548f6937 | 4662 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
742f41ad LP |
4663 | if (r < 0) |
4664 | return r; | |
a57f7e2c LP |
4665 | |
4666 | q = strdup(prefix); | |
4667 | if (!q) | |
4668 | return -ENOMEM; | |
4669 | ||
d5099efc | 4670 | x = set_new(NULL); |
ca8700e9 | 4671 | if (!x) |
a57f7e2c | 4672 | return -ENOMEM; |
a57f7e2c LP |
4673 | |
4674 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4675 | if (r < 0) { | |
a57f7e2c LP |
4676 | set_free(x); |
4677 | return r; | |
4678 | } | |
ca8700e9 | 4679 | q = NULL; |
a57f7e2c LP |
4680 | } |
4681 | ||
4682 | r = set_put(x, u); | |
4683 | if (r < 0) | |
4684 | return r; | |
4685 | } | |
4686 | ||
4687 | return 0; | |
4688 | } | |
4689 | ||
613b411c LP |
4690 | int unit_setup_exec_runtime(Unit *u) { |
4691 | ExecRuntime **rt; | |
4692 | size_t offset; | |
613b411c | 4693 | Unit *other; |
e8a565cb | 4694 | int r; |
613b411c LP |
4695 | |
4696 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4697 | assert(offset > 0); | |
4698 | ||
06b643e7 | 4699 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
4700 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
4701 | if (*rt) | |
4702 | return 0; | |
4703 | ||
4704 | /* Try to get it from somebody else */ | |
15ed3c3a | 4705 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_JOINS_NAMESPACE_OF) { |
e8a565cb YW |
4706 | r = exec_runtime_acquire(u->manager, NULL, other->id, false, rt); |
4707 | if (r == 1) | |
4708 | return 1; | |
613b411c LP |
4709 | } |
4710 | ||
e8a565cb | 4711 | return exec_runtime_acquire(u->manager, unit_get_exec_context(u), u->id, true, rt); |
613b411c LP |
4712 | } |
4713 | ||
29206d46 LP |
4714 | int unit_setup_dynamic_creds(Unit *u) { |
4715 | ExecContext *ec; | |
4716 | DynamicCreds *dcreds; | |
4717 | size_t offset; | |
4718 | ||
4719 | assert(u); | |
4720 | ||
4721 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
4722 | assert(offset > 0); | |
4723 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
4724 | ||
4725 | ec = unit_get_exec_context(u); | |
4726 | assert(ec); | |
4727 | ||
4728 | if (!ec->dynamic_user) | |
4729 | return 0; | |
4730 | ||
4731 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
4732 | } | |
4733 | ||
1c2e9646 LP |
4734 | bool unit_type_supported(UnitType t) { |
4735 | if (_unlikely_(t < 0)) | |
4736 | return false; | |
4737 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
4738 | return false; | |
4739 | ||
4740 | if (!unit_vtable[t]->supported) | |
4741 | return true; | |
4742 | ||
4743 | return unit_vtable[t]->supported(); | |
4744 | } | |
4745 | ||
8b4305c7 LP |
4746 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
4747 | int r; | |
4748 | ||
4749 | assert(u); | |
4750 | assert(where); | |
4751 | ||
c2503e35 RH |
4752 | if (!unit_log_level_test(u, LOG_NOTICE)) |
4753 | return; | |
4754 | ||
8b4305c7 | 4755 | r = dir_is_empty(where); |
3f602115 | 4756 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
4757 | return; |
4758 | if (r < 0) { | |
4759 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
4760 | return; | |
4761 | } | |
4762 | ||
c2503e35 RH |
4763 | log_unit_struct(u, LOG_NOTICE, |
4764 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
4765 | LOG_UNIT_INVOCATION_ID(u), | |
4766 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
4767 | "WHERE=%s", where); | |
8b4305c7 LP |
4768 | } |
4769 | ||
25cd4964 | 4770 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
58d9d89b | 4771 | _cleanup_free_ char *canonical_where = NULL; |
8b4305c7 LP |
4772 | int r; |
4773 | ||
4774 | assert(u); | |
4775 | assert(where); | |
4776 | ||
a5648b80 | 4777 | r = chase_symlinks(where, NULL, CHASE_NONEXISTENT, &canonical_where, NULL); |
8b4305c7 | 4778 | if (r < 0) { |
25cd4964 | 4779 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
4780 | return 0; |
4781 | } | |
25cd4964 AJ |
4782 | |
4783 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
4784 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
4785 | return 0; |
4786 | ||
25cd4964 | 4787 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
c2503e35 RH |
4788 | log_unit_struct(u, LOG_ERR, |
4789 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
4790 | LOG_UNIT_INVOCATION_ID(u), | |
4791 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), | |
4792 | "WHERE=%s", where); | |
8b4305c7 LP |
4793 | |
4794 | return -ELOOP; | |
4795 | } | |
0f13f3bd LP |
4796 | |
4797 | bool unit_is_pristine(Unit *u) { | |
4798 | assert(u); | |
4799 | ||
7c65093a | 4800 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
4801 | * in a number of different ways. Note that to cater for unit |
4802 | * types such as slice, we are generally fine with units that | |
e9e8cbc8 ZJS |
4803 | * are marked UNIT_LOADED even though nothing was actually |
4804 | * loaded, as those unit types don't require a file on disk. */ | |
0f13f3bd LP |
4805 | |
4806 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
4807 | u->fragment_path || | |
4808 | u->source_path || | |
4809 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
4810 | u->job || |
4811 | u->merged_into); | |
4812 | } | |
291d565a LP |
4813 | |
4814 | pid_t unit_control_pid(Unit *u) { | |
4815 | assert(u); | |
4816 | ||
4817 | if (UNIT_VTABLE(u)->control_pid) | |
4818 | return UNIT_VTABLE(u)->control_pid(u); | |
4819 | ||
4820 | return 0; | |
4821 | } | |
4822 | ||
4823 | pid_t unit_main_pid(Unit *u) { | |
4824 | assert(u); | |
4825 | ||
4826 | if (UNIT_VTABLE(u)->main_pid) | |
4827 | return UNIT_VTABLE(u)->main_pid(u); | |
4828 | ||
4829 | return 0; | |
4830 | } | |
00d9ef85 LP |
4831 | |
4832 | static void unit_unref_uid_internal( | |
4833 | Unit *u, | |
4834 | uid_t *ref_uid, | |
4835 | bool destroy_now, | |
4836 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
4837 | ||
4838 | assert(u); | |
4839 | assert(ref_uid); | |
4840 | assert(_manager_unref_uid); | |
4841 | ||
4842 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
4843 | * gid_t are actually the same time, with the same validity rules. | |
4844 | * | |
4845 | * Drops a reference to UID/GID from a unit. */ | |
4846 | ||
4847 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4848 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4849 | ||
4850 | if (!uid_is_valid(*ref_uid)) | |
4851 | return; | |
4852 | ||
4853 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
4854 | *ref_uid = UID_INVALID; | |
4855 | } | |
4856 | ||
b90cf102 | 4857 | static void unit_unref_uid(Unit *u, bool destroy_now) { |
00d9ef85 LP |
4858 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); |
4859 | } | |
4860 | ||
b90cf102 | 4861 | static void unit_unref_gid(Unit *u, bool destroy_now) { |
00d9ef85 LP |
4862 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); |
4863 | } | |
4864 | ||
b90cf102 LP |
4865 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { |
4866 | assert(u); | |
4867 | ||
4868 | unit_unref_uid(u, destroy_now); | |
4869 | unit_unref_gid(u, destroy_now); | |
4870 | } | |
4871 | ||
00d9ef85 LP |
4872 | static int unit_ref_uid_internal( |
4873 | Unit *u, | |
4874 | uid_t *ref_uid, | |
4875 | uid_t uid, | |
4876 | bool clean_ipc, | |
4877 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
4878 | ||
4879 | int r; | |
4880 | ||
4881 | assert(u); | |
4882 | assert(ref_uid); | |
4883 | assert(uid_is_valid(uid)); | |
4884 | assert(_manager_ref_uid); | |
4885 | ||
4886 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
4887 | * are actually the same type, and have the same validity rules. | |
4888 | * | |
4889 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
4890 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
4891 | * drops to zero. */ | |
4892 | ||
4893 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4894 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4895 | ||
4896 | if (*ref_uid == uid) | |
4897 | return 0; | |
4898 | ||
4899 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
4900 | return -EBUSY; | |
4901 | ||
4902 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
4903 | if (r < 0) | |
4904 | return r; | |
4905 | ||
4906 | *ref_uid = uid; | |
4907 | return 1; | |
4908 | } | |
4909 | ||
b90cf102 | 4910 | static int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { |
00d9ef85 LP |
4911 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); |
4912 | } | |
4913 | ||
b90cf102 | 4914 | static int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { |
00d9ef85 LP |
4915 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); |
4916 | } | |
4917 | ||
4918 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
4919 | int r = 0, q = 0; | |
4920 | ||
4921 | assert(u); | |
4922 | ||
4923 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
4924 | ||
4925 | if (uid_is_valid(uid)) { | |
4926 | r = unit_ref_uid(u, uid, clean_ipc); | |
4927 | if (r < 0) | |
4928 | return r; | |
4929 | } | |
4930 | ||
4931 | if (gid_is_valid(gid)) { | |
4932 | q = unit_ref_gid(u, gid, clean_ipc); | |
4933 | if (q < 0) { | |
4934 | if (r > 0) | |
4935 | unit_unref_uid(u, false); | |
4936 | ||
4937 | return q; | |
4938 | } | |
4939 | } | |
4940 | ||
4941 | return r > 0 || q > 0; | |
4942 | } | |
4943 | ||
4944 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
4945 | ExecContext *c; | |
4946 | int r; | |
4947 | ||
4948 | assert(u); | |
4949 | ||
4950 | c = unit_get_exec_context(u); | |
4951 | ||
4952 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
4953 | if (r < 0) | |
4954 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
4955 | ||
4956 | return r; | |
4957 | } | |
4958 | ||
00d9ef85 LP |
4959 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { |
4960 | int r; | |
4961 | ||
4962 | assert(u); | |
4963 | ||
4964 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
4965 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
4966 | * objects when no service references the UID/GID anymore. */ | |
4967 | ||
4968 | r = unit_ref_uid_gid(u, uid, gid); | |
4969 | if (r > 0) | |
37d0b962 | 4970 | unit_add_to_dbus_queue(u); |
00d9ef85 | 4971 | } |
4b58153d | 4972 | |
4b58153d LP |
4973 | int unit_acquire_invocation_id(Unit *u) { |
4974 | sd_id128_t id; | |
4975 | int r; | |
4976 | ||
4977 | assert(u); | |
4978 | ||
4979 | r = sd_id128_randomize(&id); | |
4980 | if (r < 0) | |
4981 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
4982 | ||
4983 | r = unit_set_invocation_id(u, id); | |
4984 | if (r < 0) | |
4985 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
4986 | ||
af92c603 | 4987 | unit_add_to_dbus_queue(u); |
4b58153d LP |
4988 | return 0; |
4989 | } | |
f0d47797 | 4990 | |
1ad6e8b3 LP |
4991 | int unit_set_exec_params(Unit *u, ExecParameters *p) { |
4992 | int r; | |
4993 | ||
7960b0c7 LP |
4994 | assert(u); |
4995 | assert(p); | |
f0d47797 | 4996 | |
004c7f16 | 4997 | /* Copy parameters from manager */ |
1ad6e8b3 LP |
4998 | r = manager_get_effective_environment(u->manager, &p->environment); |
4999 | if (r < 0) | |
5000 | return r; | |
5001 | ||
004c7f16 LP |
5002 | p->confirm_spawn = manager_get_confirm_spawn(u->manager); |
5003 | p->cgroup_supported = u->manager->cgroup_supported; | |
5004 | p->prefix = u->manager->prefix; | |
5005 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
5006 | ||
5238e957 | 5007 | /* Copy parameters from unit */ |
7960b0c7 | 5008 | p->cgroup_path = u->cgroup_path; |
1d9cc876 | 5009 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
1ad6e8b3 | 5010 | |
bb0c0d6f LP |
5011 | p->received_credentials = u->manager->received_credentials; |
5012 | ||
1ad6e8b3 | 5013 | return 0; |
f0d47797 | 5014 | } |
a79279c7 | 5015 | |
4c253ed1 | 5016 | int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) { |
a79279c7 LP |
5017 | int r; |
5018 | ||
5019 | assert(u); | |
5020 | assert(ret); | |
5021 | ||
5022 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
5023 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
5024 | ||
5025 | (void) unit_realize_cgroup(u); | |
5026 | ||
4c253ed1 LP |
5027 | r = safe_fork(name, FORK_REOPEN_LOG, ret); |
5028 | if (r != 0) | |
5029 | return r; | |
a79279c7 | 5030 | |
9c274488 LP |
5031 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE); |
5032 | (void) ignore_signals(SIGPIPE); | |
a79279c7 | 5033 | |
4c253ed1 | 5034 | (void) prctl(PR_SET_PDEATHSIG, SIGTERM); |
a79279c7 | 5035 | |
4c253ed1 LP |
5036 | if (u->cgroup_path) { |
5037 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
5038 | if (r < 0) { | |
6178e2f8 | 5039 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", empty_to_root(u->cgroup_path)); |
4c253ed1 | 5040 | _exit(EXIT_CGROUP); |
a79279c7 | 5041 | } |
a79279c7 LP |
5042 | } |
5043 | ||
4c253ed1 | 5044 | return 0; |
a79279c7 | 5045 | } |
c999cf38 | 5046 | |
810ef318 YW |
5047 | int unit_fork_and_watch_rm_rf(Unit *u, char **paths, pid_t *ret_pid) { |
5048 | pid_t pid; | |
5049 | int r; | |
5050 | ||
5051 | assert(u); | |
5052 | assert(ret_pid); | |
5053 | ||
5054 | r = unit_fork_helper_process(u, "(sd-rmrf)", &pid); | |
5055 | if (r < 0) | |
5056 | return r; | |
5057 | if (r == 0) { | |
5058 | int ret = EXIT_SUCCESS; | |
5059 | char **i; | |
5060 | ||
5061 | STRV_FOREACH(i, paths) { | |
5062 | r = rm_rf(*i, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_MISSING_OK); | |
5063 | if (r < 0) { | |
5064 | log_error_errno(r, "Failed to remove '%s': %m", *i); | |
5065 | ret = EXIT_FAILURE; | |
5066 | } | |
5067 | } | |
5068 | ||
5069 | _exit(ret); | |
5070 | } | |
5071 | ||
5072 | r = unit_watch_pid(u, pid, true); | |
5073 | if (r < 0) | |
5074 | return r; | |
5075 | ||
5076 | *ret_pid = pid; | |
5077 | return 0; | |
5078 | } | |
5079 | ||
15ed3c3a LP |
5080 | static void unit_update_dependency_mask(Hashmap *deps, Unit *other, UnitDependencyInfo di) { |
5081 | assert(deps); | |
c999cf38 LP |
5082 | assert(other); |
5083 | ||
15ed3c3a | 5084 | if (di.origin_mask == 0 && di.destination_mask == 0) |
c999cf38 | 5085 | /* No bit set anymore, let's drop the whole entry */ |
15ed3c3a LP |
5086 | assert_se(hashmap_remove(deps, other)); |
5087 | else | |
c999cf38 | 5088 | /* Mask was reduced, let's update the entry */ |
15ed3c3a | 5089 | assert_se(hashmap_update(deps, other, di.data) == 0); |
c999cf38 LP |
5090 | } |
5091 | ||
5092 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
15ed3c3a | 5093 | Hashmap *deps; |
c999cf38 LP |
5094 | assert(u); |
5095 | ||
5096 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5097 | ||
5098 | if (mask == 0) | |
5099 | return; | |
5100 | ||
15ed3c3a | 5101 | HASHMAP_FOREACH(deps, u->dependencies) { |
c999cf38 LP |
5102 | bool done; |
5103 | ||
5104 | do { | |
5105 | UnitDependencyInfo di; | |
5106 | Unit *other; | |
c999cf38 LP |
5107 | |
5108 | done = true; | |
5109 | ||
15ed3c3a LP |
5110 | HASHMAP_FOREACH_KEY(di.data, other, deps) { |
5111 | Hashmap *other_deps; | |
5112 | ||
1d6cc5d0 | 5113 | if (FLAGS_SET(~mask, di.origin_mask)) |
c999cf38 | 5114 | continue; |
15ed3c3a | 5115 | |
c999cf38 | 5116 | di.origin_mask &= ~mask; |
15ed3c3a | 5117 | unit_update_dependency_mask(deps, other, di); |
c999cf38 | 5118 | |
defe63b0 LP |
5119 | /* We updated the dependency from our unit to the other unit now. But most |
5120 | * dependencies imply a reverse dependency. Hence, let's delete that one | |
5121 | * too. For that we go through all dependency types on the other unit and | |
5122 | * delete all those which point to us and have the right mask set. */ | |
c999cf38 | 5123 | |
15ed3c3a | 5124 | HASHMAP_FOREACH(other_deps, other->dependencies) { |
c999cf38 LP |
5125 | UnitDependencyInfo dj; |
5126 | ||
15ed3c3a | 5127 | dj.data = hashmap_get(other_deps, u); |
1d6cc5d0 | 5128 | if (FLAGS_SET(~mask, dj.destination_mask)) |
c999cf38 | 5129 | continue; |
c999cf38 | 5130 | |
15ed3c3a LP |
5131 | dj.destination_mask &= ~mask; |
5132 | unit_update_dependency_mask(other_deps, u, dj); | |
c999cf38 LP |
5133 | } |
5134 | ||
5135 | unit_add_to_gc_queue(other); | |
5136 | ||
5137 | done = false; | |
5138 | break; | |
5139 | } | |
5140 | ||
5141 | } while (!done); | |
5142 | } | |
5143 | } | |
d3070fbd | 5144 | |
2f8c48b6 AZ |
5145 | static int unit_get_invocation_path(Unit *u, char **ret) { |
5146 | char *p; | |
5147 | int r; | |
5148 | ||
5149 | assert(u); | |
5150 | assert(ret); | |
5151 | ||
5152 | if (MANAGER_IS_SYSTEM(u->manager)) | |
5153 | p = strjoin("/run/systemd/units/invocation:", u->id); | |
5154 | else { | |
5155 | _cleanup_free_ char *user_path = NULL; | |
5156 | r = xdg_user_runtime_dir(&user_path, "/systemd/units/invocation:"); | |
5157 | if (r < 0) | |
5158 | return r; | |
5159 | p = strjoin(user_path, u->id); | |
5160 | } | |
5161 | ||
5162 | if (!p) | |
5163 | return -ENOMEM; | |
5164 | ||
5165 | *ret = p; | |
5166 | return 0; | |
5167 | } | |
5168 | ||
d3070fbd | 5169 | static int unit_export_invocation_id(Unit *u) { |
2f8c48b6 | 5170 | _cleanup_free_ char *p = NULL; |
d3070fbd LP |
5171 | int r; |
5172 | ||
5173 | assert(u); | |
5174 | ||
5175 | if (u->exported_invocation_id) | |
5176 | return 0; | |
5177 | ||
5178 | if (sd_id128_is_null(u->invocation_id)) | |
5179 | return 0; | |
5180 | ||
2f8c48b6 AZ |
5181 | r = unit_get_invocation_path(u, &p); |
5182 | if (r < 0) | |
5183 | return log_unit_debug_errno(u, r, "Failed to get invocation path: %m"); | |
5184 | ||
a3f5fd96 | 5185 | r = symlink_atomic_label(u->invocation_id_string, p); |
d3070fbd LP |
5186 | if (r < 0) |
5187 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5188 | ||
5189 | u->exported_invocation_id = true; | |
5190 | return 0; | |
5191 | } | |
5192 | ||
5193 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5194 | const char *p; | |
5195 | char buf[2]; | |
5196 | int r; | |
5197 | ||
5198 | assert(u); | |
5199 | assert(c); | |
5200 | ||
5201 | if (u->exported_log_level_max) | |
5202 | return 0; | |
5203 | ||
5204 | if (c->log_level_max < 0) | |
5205 | return 0; | |
5206 | ||
5207 | assert(c->log_level_max <= 7); | |
5208 | ||
5209 | buf[0] = '0' + c->log_level_max; | |
5210 | buf[1] = 0; | |
5211 | ||
5212 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5213 | r = symlink_atomic(buf, p); | |
5214 | if (r < 0) | |
5215 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5216 | ||
5217 | u->exported_log_level_max = true; | |
5218 | return 0; | |
5219 | } | |
5220 | ||
5221 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5222 | _cleanup_close_ int fd = -1; | |
5223 | struct iovec *iovec; | |
5224 | const char *p; | |
5225 | char *pattern; | |
5226 | le64_t *sizes; | |
5227 | ssize_t n; | |
d3070fbd LP |
5228 | int r; |
5229 | ||
5230 | if (u->exported_log_extra_fields) | |
5231 | return 0; | |
5232 | ||
5233 | if (c->n_log_extra_fields <= 0) | |
5234 | return 0; | |
5235 | ||
5236 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5237 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5238 | ||
12375b95 | 5239 | for (size_t i = 0; i < c->n_log_extra_fields; i++) { |
d3070fbd LP |
5240 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); |
5241 | ||
5242 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5243 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5244 | } | |
5245 | ||
5246 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5247 | pattern = strjoina(p, ".XXXXXX"); | |
5248 | ||
5249 | fd = mkostemp_safe(pattern); | |
5250 | if (fd < 0) | |
5251 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5252 | ||
5253 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5254 | if (n < 0) { | |
5255 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5256 | goto fail; | |
5257 | } | |
5258 | ||
5259 | (void) fchmod(fd, 0644); | |
5260 | ||
5261 | if (rename(pattern, p) < 0) { | |
5262 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5263 | goto fail; | |
5264 | } | |
5265 | ||
5266 | u->exported_log_extra_fields = true; | |
5267 | return 0; | |
5268 | ||
5269 | fail: | |
5270 | (void) unlink(pattern); | |
5271 | return r; | |
5272 | } | |
5273 | ||
5ac1530e | 5274 | static int unit_export_log_ratelimit_interval(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5275 | _cleanup_free_ char *buf = NULL; |
5276 | const char *p; | |
5277 | int r; | |
5278 | ||
5279 | assert(u); | |
5280 | assert(c); | |
5281 | ||
5ac1530e | 5282 | if (u->exported_log_ratelimit_interval) |
90fc172e AZ |
5283 | return 0; |
5284 | ||
5ac1530e | 5285 | if (c->log_ratelimit_interval_usec == 0) |
90fc172e AZ |
5286 | return 0; |
5287 | ||
5288 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5289 | ||
5ac1530e | 5290 | if (asprintf(&buf, "%" PRIu64, c->log_ratelimit_interval_usec) < 0) |
90fc172e AZ |
5291 | return log_oom(); |
5292 | ||
5293 | r = symlink_atomic(buf, p); | |
5294 | if (r < 0) | |
5295 | return log_unit_debug_errno(u, r, "Failed to create log rate limit interval symlink %s: %m", p); | |
5296 | ||
5ac1530e | 5297 | u->exported_log_ratelimit_interval = true; |
90fc172e AZ |
5298 | return 0; |
5299 | } | |
5300 | ||
5ac1530e | 5301 | static int unit_export_log_ratelimit_burst(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5302 | _cleanup_free_ char *buf = NULL; |
5303 | const char *p; | |
5304 | int r; | |
5305 | ||
5306 | assert(u); | |
5307 | assert(c); | |
5308 | ||
5ac1530e | 5309 | if (u->exported_log_ratelimit_burst) |
90fc172e AZ |
5310 | return 0; |
5311 | ||
5ac1530e | 5312 | if (c->log_ratelimit_burst == 0) |
90fc172e AZ |
5313 | return 0; |
5314 | ||
5315 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5316 | ||
5ac1530e | 5317 | if (asprintf(&buf, "%u", c->log_ratelimit_burst) < 0) |
90fc172e AZ |
5318 | return log_oom(); |
5319 | ||
5320 | r = symlink_atomic(buf, p); | |
5321 | if (r < 0) | |
5322 | return log_unit_debug_errno(u, r, "Failed to create log rate limit burst symlink %s: %m", p); | |
5323 | ||
5ac1530e | 5324 | u->exported_log_ratelimit_burst = true; |
90fc172e AZ |
5325 | return 0; |
5326 | } | |
5327 | ||
d3070fbd LP |
5328 | void unit_export_state_files(Unit *u) { |
5329 | const ExecContext *c; | |
5330 | ||
5331 | assert(u); | |
5332 | ||
5333 | if (!u->id) | |
5334 | return; | |
5335 | ||
638cece4 | 5336 | if (MANAGER_IS_TEST_RUN(u->manager)) |
8f632531 LP |
5337 | return; |
5338 | ||
d3070fbd LP |
5339 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5340 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5341 | * the IPC system itself and PID 1 also log to the journal. | |
5342 | * | |
5343 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5344 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5345 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5346 | * namespace at least. | |
5347 | * | |
5348 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5349 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5350 | * them with one. */ | |
5351 | ||
5352 | (void) unit_export_invocation_id(u); | |
5353 | ||
2f8c48b6 AZ |
5354 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5355 | return; | |
5356 | ||
d3070fbd LP |
5357 | c = unit_get_exec_context(u); |
5358 | if (c) { | |
5359 | (void) unit_export_log_level_max(u, c); | |
5360 | (void) unit_export_log_extra_fields(u, c); | |
5ac1530e ZJS |
5361 | (void) unit_export_log_ratelimit_interval(u, c); |
5362 | (void) unit_export_log_ratelimit_burst(u, c); | |
d3070fbd LP |
5363 | } |
5364 | } | |
5365 | ||
5366 | void unit_unlink_state_files(Unit *u) { | |
5367 | const char *p; | |
5368 | ||
5369 | assert(u); | |
5370 | ||
5371 | if (!u->id) | |
5372 | return; | |
5373 | ||
d3070fbd LP |
5374 | /* Undoes the effect of unit_export_state() */ |
5375 | ||
5376 | if (u->exported_invocation_id) { | |
2f8c48b6 AZ |
5377 | _cleanup_free_ char *invocation_path = NULL; |
5378 | int r = unit_get_invocation_path(u, &invocation_path); | |
5379 | if (r >= 0) { | |
5380 | (void) unlink(invocation_path); | |
5381 | u->exported_invocation_id = false; | |
5382 | } | |
d3070fbd LP |
5383 | } |
5384 | ||
2f8c48b6 AZ |
5385 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5386 | return; | |
5387 | ||
d3070fbd LP |
5388 | if (u->exported_log_level_max) { |
5389 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5390 | (void) unlink(p); | |
5391 | ||
5392 | u->exported_log_level_max = false; | |
5393 | } | |
5394 | ||
5395 | if (u->exported_log_extra_fields) { | |
5396 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5397 | (void) unlink(p); | |
5398 | ||
5399 | u->exported_log_extra_fields = false; | |
5400 | } | |
90fc172e | 5401 | |
5ac1530e | 5402 | if (u->exported_log_ratelimit_interval) { |
90fc172e AZ |
5403 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); |
5404 | (void) unlink(p); | |
5405 | ||
5ac1530e | 5406 | u->exported_log_ratelimit_interval = false; |
90fc172e AZ |
5407 | } |
5408 | ||
5ac1530e | 5409 | if (u->exported_log_ratelimit_burst) { |
90fc172e AZ |
5410 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); |
5411 | (void) unlink(p); | |
5412 | ||
5ac1530e | 5413 | u->exported_log_ratelimit_burst = false; |
90fc172e | 5414 | } |
d3070fbd | 5415 | } |
5afe510c | 5416 | |
3c7416b6 LP |
5417 | int unit_prepare_exec(Unit *u) { |
5418 | int r; | |
5419 | ||
5420 | assert(u); | |
5421 | ||
fab34748 KL |
5422 | /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable. |
5423 | * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */ | |
5424 | r = bpf_firewall_load_custom(u); | |
5425 | if (r < 0) | |
5426 | return r; | |
5427 | ||
3c7416b6 LP |
5428 | /* Prepares everything so that we can fork of a process for this unit */ |
5429 | ||
5430 | (void) unit_realize_cgroup(u); | |
5431 | ||
5432 | if (u->reset_accounting) { | |
9b2559a1 | 5433 | (void) unit_reset_accounting(u); |
3c7416b6 LP |
5434 | u->reset_accounting = false; |
5435 | } | |
5436 | ||
5437 | unit_export_state_files(u); | |
5438 | ||
5439 | r = unit_setup_exec_runtime(u); | |
5440 | if (r < 0) | |
5441 | return r; | |
5442 | ||
5443 | r = unit_setup_dynamic_creds(u); | |
5444 | if (r < 0) | |
5445 | return r; | |
5446 | ||
5447 | return 0; | |
5448 | } | |
5449 | ||
4c425434 LP |
5450 | static bool ignore_leftover_process(const char *comm) { |
5451 | return comm && comm[0] == '('; /* Most likely our own helper process (PAM?), ignore */ | |
5452 | } | |
5453 | ||
5454 | int unit_log_leftover_process_start(pid_t pid, int sig, void *userdata) { | |
a4634b21 LP |
5455 | _cleanup_free_ char *comm = NULL; |
5456 | ||
5457 | (void) get_process_comm(pid, &comm); | |
5458 | ||
4c425434 | 5459 | if (ignore_leftover_process(comm)) |
c53d2d54 | 5460 | return 0; |
a4634b21 | 5461 | |
4c425434 LP |
5462 | /* During start we print a warning */ |
5463 | ||
a4634b21 LP |
5464 | log_unit_warning(userdata, |
5465 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5466 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5467 | pid, strna(comm)); | |
c53d2d54 DB |
5468 | |
5469 | return 1; | |
a4634b21 LP |
5470 | } |
5471 | ||
4c425434 LP |
5472 | int unit_log_leftover_process_stop(pid_t pid, int sig, void *userdata) { |
5473 | _cleanup_free_ char *comm = NULL; | |
5474 | ||
5475 | (void) get_process_comm(pid, &comm); | |
5476 | ||
5477 | if (ignore_leftover_process(comm)) | |
5478 | return 0; | |
5479 | ||
5480 | /* During stop we only print an informational message */ | |
5481 | ||
5482 | log_unit_info(userdata, | |
5483 | "Unit process " PID_FMT " (%s) remains running after unit stopped.", | |
5484 | pid, strna(comm)); | |
5485 | ||
5486 | return 1; | |
5487 | } | |
5488 | ||
5489 | int unit_warn_leftover_processes(Unit *u, cg_kill_log_func_t log_func) { | |
a4634b21 LP |
5490 | assert(u); |
5491 | ||
5492 | (void) unit_pick_cgroup_path(u); | |
5493 | ||
5494 | if (!u->cgroup_path) | |
c53d2d54 | 5495 | return 0; |
a4634b21 | 5496 | |
4c425434 | 5497 | return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_func, u); |
a4634b21 LP |
5498 | } |
5499 | ||
bb2c7685 LP |
5500 | bool unit_needs_console(Unit *u) { |
5501 | ExecContext *ec; | |
5502 | UnitActiveState state; | |
5503 | ||
5504 | assert(u); | |
5505 | ||
5506 | state = unit_active_state(u); | |
5507 | ||
5508 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5509 | return false; | |
5510 | ||
5511 | if (UNIT_VTABLE(u)->needs_console) | |
5512 | return UNIT_VTABLE(u)->needs_console(u); | |
5513 | ||
5514 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5515 | ec = unit_get_exec_context(u); | |
5516 | if (!ec) | |
5517 | return false; | |
5518 | ||
5519 | return exec_context_may_touch_console(ec); | |
5520 | } | |
5521 | ||
f156e60c | 5522 | const char *unit_label_path(const Unit *u) { |
81e9871e LP |
5523 | const char *p; |
5524 | ||
f156e60c CG |
5525 | assert(u); |
5526 | ||
81e9871e LP |
5527 | /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off |
5528 | * when validating access checks. */ | |
5529 | ||
9cbf1282 LP |
5530 | if (IN_SET(u->load_state, UNIT_MASKED, UNIT_NOT_FOUND, UNIT_MERGED)) |
5531 | return NULL; /* Shortcut things if we know there is no real, relevant unit file around */ | |
5532 | ||
81e9871e LP |
5533 | p = u->source_path ?: u->fragment_path; |
5534 | if (!p) | |
5535 | return NULL; | |
5536 | ||
9cbf1282 LP |
5537 | if (IN_SET(u->load_state, UNIT_LOADED, UNIT_BAD_SETTING, UNIT_ERROR)) |
5538 | return p; /* Shortcut things, if we successfully loaded at least some stuff from the unit file */ | |
5539 | ||
5540 | /* Not loaded yet, we need to go to disk */ | |
5541 | assert(u->load_state == UNIT_STUB); | |
5542 | ||
81e9871e | 5543 | /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */ |
640f3b14 | 5544 | if (null_or_empty_path(p) > 0) |
81e9871e LP |
5545 | return NULL; |
5546 | ||
5547 | return p; | |
5548 | } | |
5549 | ||
6592b975 LP |
5550 | int unit_pid_attachable(Unit *u, pid_t pid, sd_bus_error *error) { |
5551 | int r; | |
5552 | ||
5553 | assert(u); | |
5554 | ||
5555 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5556 | * and not a kernel thread either */ | |
5557 | ||
5558 | /* First, a simple range check */ | |
5559 | if (!pid_is_valid(pid)) | |
5560 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier " PID_FMT " is not valid.", pid); | |
5561 | ||
5562 | /* Some extra safety check */ | |
5563 | if (pid == 1 || pid == getpid_cached()) | |
3fe91079 | 5564 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager process, refusing.", pid); |
6592b975 LP |
5565 | |
5566 | /* Don't even begin to bother with kernel threads */ | |
5567 | r = is_kernel_thread(pid); | |
5568 | if (r == -ESRCH) | |
5569 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid); | |
5570 | if (r < 0) | |
5571 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid); | |
5572 | if (r > 0) | |
5573 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid); | |
5574 | ||
5575 | return 0; | |
5576 | } | |
5577 | ||
523ee2d4 LP |
5578 | void unit_log_success(Unit *u) { |
5579 | assert(u); | |
5580 | ||
edf2ee22 JM |
5581 | /* Let's show message "Deactivated successfully" in debug mode (when manager is user) rather than in info mode. |
5582 | * This message has low information value for regular users and it might be a bit overwhelming on a system with | |
5583 | * a lot of devices. */ | |
5584 | log_unit_struct(u, | |
5585 | MANAGER_IS_USER(u->manager) ? LOG_DEBUG : LOG_INFO, | |
c2503e35 RH |
5586 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR, |
5587 | LOG_UNIT_INVOCATION_ID(u), | |
5588 | LOG_UNIT_MESSAGE(u, "Deactivated successfully.")); | |
523ee2d4 LP |
5589 | } |
5590 | ||
7c047d74 LP |
5591 | void unit_log_failure(Unit *u, const char *result) { |
5592 | assert(u); | |
5593 | assert(result); | |
5594 | ||
c2503e35 RH |
5595 | log_unit_struct(u, LOG_WARNING, |
5596 | "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR, | |
5597 | LOG_UNIT_INVOCATION_ID(u), | |
5598 | LOG_UNIT_MESSAGE(u, "Failed with result '%s'.", result), | |
5599 | "UNIT_RESULT=%s", result); | |
7c047d74 LP |
5600 | } |
5601 | ||
31cd5f63 AZ |
5602 | void unit_log_skip(Unit *u, const char *result) { |
5603 | assert(u); | |
5604 | assert(result); | |
5605 | ||
c2503e35 RH |
5606 | log_unit_struct(u, LOG_INFO, |
5607 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR, | |
5608 | LOG_UNIT_INVOCATION_ID(u), | |
5609 | LOG_UNIT_MESSAGE(u, "Skipped due to '%s'.", result), | |
5610 | "UNIT_RESULT=%s", result); | |
31cd5f63 AZ |
5611 | } |
5612 | ||
91bbd9b7 LP |
5613 | void unit_log_process_exit( |
5614 | Unit *u, | |
91bbd9b7 LP |
5615 | const char *kind, |
5616 | const char *command, | |
5cc2cd1c | 5617 | bool success, |
91bbd9b7 LP |
5618 | int code, |
5619 | int status) { | |
5620 | ||
5cc2cd1c ZJS |
5621 | int level; |
5622 | ||
91bbd9b7 LP |
5623 | assert(u); |
5624 | assert(kind); | |
5625 | ||
5cc2cd1c ZJS |
5626 | /* If this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure |
5627 | * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption | |
5628 | * that the service already logged the reason at a higher log level on its own. Otherwise, make it a | |
5629 | * WARNING. */ | |
5630 | if (success) | |
5631 | level = LOG_DEBUG; | |
5632 | else if (code == CLD_EXITED) | |
5633 | level = LOG_NOTICE; | |
5634 | else | |
91bbd9b7 LP |
5635 | level = LOG_WARNING; |
5636 | ||
c2503e35 RH |
5637 | log_unit_struct(u, level, |
5638 | "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR, | |
58441bc1 | 5639 | LOG_UNIT_MESSAGE(u, "%s exited, code=%s, status=%i/%s%s", |
c2503e35 RH |
5640 | kind, |
5641 | sigchld_code_to_string(code), status, | |
5642 | strna(code == CLD_EXITED | |
5643 | ? exit_status_to_string(status, EXIT_STATUS_FULL) | |
58441bc1 ZJS |
5644 | : signal_to_string(status)), |
5645 | success ? " (success)" : ""), | |
c2503e35 RH |
5646 | "EXIT_CODE=%s", sigchld_code_to_string(code), |
5647 | "EXIT_STATUS=%i", status, | |
5648 | "COMMAND=%s", strna(command), | |
5649 | LOG_UNIT_INVOCATION_ID(u)); | |
91bbd9b7 LP |
5650 | } |
5651 | ||
7af67e9a LP |
5652 | int unit_exit_status(Unit *u) { |
5653 | assert(u); | |
5654 | ||
5655 | /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range | |
5656 | * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA | |
5657 | * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main | |
5658 | * service process has exited abnormally (signal/coredump). */ | |
5659 | ||
5660 | if (!UNIT_VTABLE(u)->exit_status) | |
5661 | return -EOPNOTSUPP; | |
5662 | ||
5663 | return UNIT_VTABLE(u)->exit_status(u); | |
5664 | } | |
5665 | ||
5666 | int unit_failure_action_exit_status(Unit *u) { | |
5667 | int r; | |
5668 | ||
5669 | assert(u); | |
5670 | ||
5671 | /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */ | |
5672 | ||
5673 | if (u->failure_action_exit_status >= 0) | |
5674 | return u->failure_action_exit_status; | |
5675 | ||
5676 | r = unit_exit_status(u); | |
5677 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5678 | return 255; | |
5679 | ||
5680 | return r; | |
5681 | } | |
5682 | ||
5683 | int unit_success_action_exit_status(Unit *u) { | |
5684 | int r; | |
5685 | ||
5686 | assert(u); | |
5687 | ||
5688 | /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */ | |
5689 | ||
5690 | if (u->success_action_exit_status >= 0) | |
5691 | return u->success_action_exit_status; | |
5692 | ||
5693 | r = unit_exit_status(u); | |
5694 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5695 | return 255; | |
5696 | ||
5697 | return r; | |
5698 | } | |
5699 | ||
a4191c9f LP |
5700 | int unit_test_trigger_loaded(Unit *u) { |
5701 | Unit *trigger; | |
5702 | ||
5703 | /* Tests whether the unit to trigger is loaded */ | |
5704 | ||
5705 | trigger = UNIT_TRIGGER(u); | |
5706 | if (!trigger) | |
e7b9f4d9 ZJS |
5707 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
5708 | "Refusing to start, no unit to trigger."); | |
a4191c9f | 5709 | if (trigger->load_state != UNIT_LOADED) |
e7b9f4d9 ZJS |
5710 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
5711 | "Refusing to start, unit %s to trigger not loaded.", trigger->id); | |
a4191c9f LP |
5712 | |
5713 | return 0; | |
5714 | } | |
5715 | ||
bb0c0d6f LP |
5716 | void unit_destroy_runtime_data(Unit *u, const ExecContext *context) { |
5717 | assert(u); | |
5718 | assert(context); | |
5719 | ||
95939aed YW |
5720 | if (context->runtime_directory_preserve_mode == EXEC_PRESERVE_NO || |
5721 | (context->runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART && !unit_will_restart(u))) | |
5722 | exec_context_destroy_runtime_directory(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME]); | |
bb0c0d6f LP |
5723 | |
5724 | exec_context_destroy_credentials(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME], u->id); | |
95939aed YW |
5725 | } |
5726 | ||
380dc8b0 LP |
5727 | int unit_clean(Unit *u, ExecCleanMask mask) { |
5728 | UnitActiveState state; | |
5729 | ||
5730 | assert(u); | |
5731 | ||
5732 | /* Special return values: | |
5733 | * | |
5734 | * -EOPNOTSUPP → cleaning not supported for this unit type | |
5735 | * -EUNATCH → cleaning not defined for this resource type | |
5736 | * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has | |
5737 | * a job queued or similar | |
5738 | */ | |
5739 | ||
5740 | if (!UNIT_VTABLE(u)->clean) | |
5741 | return -EOPNOTSUPP; | |
5742 | ||
5743 | if (mask == 0) | |
5744 | return -EUNATCH; | |
5745 | ||
5746 | if (u->load_state != UNIT_LOADED) | |
5747 | return -EBUSY; | |
5748 | ||
5749 | if (u->job) | |
5750 | return -EBUSY; | |
5751 | ||
5752 | state = unit_active_state(u); | |
5753 | if (!IN_SET(state, UNIT_INACTIVE)) | |
5754 | return -EBUSY; | |
5755 | ||
5756 | return UNIT_VTABLE(u)->clean(u, mask); | |
5757 | } | |
5758 | ||
5759 | int unit_can_clean(Unit *u, ExecCleanMask *ret) { | |
5760 | assert(u); | |
5761 | ||
5762 | if (!UNIT_VTABLE(u)->clean || | |
5763 | u->load_state != UNIT_LOADED) { | |
5764 | *ret = 0; | |
5765 | return 0; | |
5766 | } | |
5767 | ||
5768 | /* When the clean() method is set, can_clean() really should be set too */ | |
5769 | assert(UNIT_VTABLE(u)->can_clean); | |
5770 | ||
5771 | return UNIT_VTABLE(u)->can_clean(u, ret); | |
5772 | } | |
5773 | ||
d9e45bc3 MS |
5774 | bool unit_can_freeze(Unit *u) { |
5775 | assert(u); | |
5776 | ||
5777 | if (UNIT_VTABLE(u)->can_freeze) | |
5778 | return UNIT_VTABLE(u)->can_freeze(u); | |
5779 | ||
5780 | return UNIT_VTABLE(u)->freeze; | |
5781 | } | |
5782 | ||
5783 | void unit_frozen(Unit *u) { | |
5784 | assert(u); | |
5785 | ||
5786 | u->freezer_state = FREEZER_FROZEN; | |
5787 | ||
5788 | bus_unit_send_pending_freezer_message(u); | |
5789 | } | |
5790 | ||
5791 | void unit_thawed(Unit *u) { | |
5792 | assert(u); | |
5793 | ||
5794 | u->freezer_state = FREEZER_RUNNING; | |
5795 | ||
5796 | bus_unit_send_pending_freezer_message(u); | |
5797 | } | |
5798 | ||
5799 | static int unit_freezer_action(Unit *u, FreezerAction action) { | |
5800 | UnitActiveState s; | |
5801 | int (*method)(Unit*); | |
5802 | int r; | |
5803 | ||
5804 | assert(u); | |
5805 | assert(IN_SET(action, FREEZER_FREEZE, FREEZER_THAW)); | |
5806 | ||
5807 | method = action == FREEZER_FREEZE ? UNIT_VTABLE(u)->freeze : UNIT_VTABLE(u)->thaw; | |
5808 | if (!method || !cg_freezer_supported()) | |
5809 | return -EOPNOTSUPP; | |
5810 | ||
5811 | if (u->job) | |
5812 | return -EBUSY; | |
5813 | ||
5814 | if (u->load_state != UNIT_LOADED) | |
5815 | return -EHOSTDOWN; | |
5816 | ||
5817 | s = unit_active_state(u); | |
5818 | if (s != UNIT_ACTIVE) | |
5819 | return -EHOSTDOWN; | |
5820 | ||
5821 | if (IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_THAWING)) | |
5822 | return -EALREADY; | |
5823 | ||
5824 | r = method(u); | |
5825 | if (r <= 0) | |
5826 | return r; | |
5827 | ||
5828 | return 1; | |
5829 | } | |
5830 | ||
5831 | int unit_freeze(Unit *u) { | |
5832 | return unit_freezer_action(u, FREEZER_FREEZE); | |
5833 | } | |
5834 | ||
5835 | int unit_thaw(Unit *u) { | |
5836 | return unit_freezer_action(u, FREEZER_THAW); | |
5837 | } | |
5838 | ||
5839 | /* Wrappers around low-level cgroup freezer operations common for service and scope units */ | |
5840 | int unit_freeze_vtable_common(Unit *u) { | |
5841 | return unit_cgroup_freezer_action(u, FREEZER_FREEZE); | |
5842 | } | |
5843 | ||
5844 | int unit_thaw_vtable_common(Unit *u) { | |
5845 | return unit_cgroup_freezer_action(u, FREEZER_THAW); | |
5846 | } | |
5847 | ||
6e548561 DDM |
5848 | Condition *unit_find_failed_condition(Unit *u) { |
5849 | Condition *c, *failed_trigger = NULL; | |
5850 | bool has_succeeded_trigger = false; | |
5851 | ||
5852 | if (u->condition_result) | |
5853 | return NULL; | |
5854 | ||
5855 | LIST_FOREACH(conditions, c, u->conditions) | |
5856 | if (c->trigger) { | |
5857 | if (c->result == CONDITION_SUCCEEDED) | |
5858 | has_succeeded_trigger = true; | |
5859 | else if (!failed_trigger) | |
5860 | failed_trigger = c; | |
5861 | } else if (c->result != CONDITION_SUCCEEDED) | |
5862 | return c; | |
5863 | ||
5864 | return failed_trigger && !has_succeeded_trigger ? failed_trigger : NULL; | |
5865 | } | |
5866 | ||
5afe510c LP |
5867 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
5868 | [COLLECT_INACTIVE] = "inactive", | |
5869 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
5870 | }; | |
5871 | ||
5872 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); | |
15ed3c3a LP |
5873 | |
5874 | Unit* unit_has_dependency(const Unit *u, UnitDependencyAtom atom, Unit *other) { | |
5875 | Unit *i; | |
5876 | ||
5877 | assert(u); | |
5878 | ||
5879 | /* Checks if the unit has a dependency on 'other' with the specified dependency atom. If 'other' is | |
5880 | * NULL checks if the unit has *any* dependency of that atom. Returns 'other' if found (or if 'other' | |
5881 | * is NULL the first entry found), or NULL if not found. */ | |
5882 | ||
5883 | UNIT_FOREACH_DEPENDENCY(i, u, atom) | |
5884 | if (!other || other == i) | |
5885 | return i; | |
5886 | ||
5887 | return NULL; | |
5888 | } | |
5889 | ||
5890 | int unit_get_dependency_array(const Unit *u, UnitDependencyAtom atom, Unit ***ret_array) { | |
5891 | _cleanup_free_ Unit **array = NULL; | |
5892 | size_t n = 0; | |
5893 | Unit *other; | |
5894 | ||
5895 | assert(u); | |
5896 | assert(ret_array); | |
5897 | ||
5898 | /* Gets a list of units matching a specific atom as array. This is useful when iterating through | |
5899 | * dependencies while modifying them: the array is an "atomic snapshot" of sorts, that can be read | |
48008c1c | 5900 | * while the dependency table is continuously updated. */ |
15ed3c3a LP |
5901 | |
5902 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
5903 | if (!GREEDY_REALLOC(array, n + 1)) | |
5904 | return -ENOMEM; | |
5905 | ||
5906 | array[n++] = other; | |
5907 | } | |
5908 | ||
5909 | *ret_array = TAKE_PTR(array); | |
5910 | ||
5911 | assert(n <= INT_MAX); | |
5912 | return (int) n; | |
5913 | } |