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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" |
35cd0ba5 | 40 | #include "mkdir-label.h" |
4f5dd394 | 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 | ||
02de9614 ZJS |
378 | static bool unit_success_failure_handler_has_jobs(Unit *unit) { |
379 | Unit *other; | |
380 | ||
381 | UNIT_FOREACH_DEPENDENCY(other, unit, UNIT_ATOM_ON_SUCCESS) | |
382 | if (other->job || other->nop_job) | |
383 | return true; | |
384 | ||
385 | UNIT_FOREACH_DEPENDENCY(other, unit, UNIT_ATOM_ON_FAILURE) | |
386 | if (other->job || other->nop_job) | |
387 | return true; | |
388 | ||
389 | return false; | |
390 | } | |
391 | ||
f2f725e5 | 392 | bool unit_may_gc(Unit *u) { |
a354329f | 393 | UnitActiveState state; |
e98b2fbb | 394 | int r; |
5afe510c | 395 | |
701cc384 LP |
396 | assert(u); |
397 | ||
f2f725e5 ZJS |
398 | /* Checks whether the unit is ready to be unloaded for garbage collection. |
399 | * Returns true when the unit may be collected, and false if there's some | |
2641f02e ZJS |
400 | * reason to keep it loaded. |
401 | * | |
402 | * References from other units are *not* checked here. Instead, this is done | |
403 | * in unit_gc_sweep(), but using markers to properly collect dependency loops. | |
404 | */ | |
5afe510c | 405 | |
02de9614 | 406 | if (u->job || u->nop_job) |
f2f725e5 | 407 | return false; |
6c073082 | 408 | |
a354329f LP |
409 | state = unit_active_state(u); |
410 | ||
7eb2a8a1 | 411 | /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */ |
a354329f LP |
412 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && |
413 | UNIT_VTABLE(u)->release_resources) | |
7eb2a8a1 | 414 | UNIT_VTABLE(u)->release_resources(u); |
a354329f | 415 | |
f5869324 | 416 | if (u->perpetual) |
f2f725e5 | 417 | return false; |
9d576438 | 418 | |
05a98afd | 419 | if (sd_bus_track_count(u->bus_track) > 0) |
f2f725e5 | 420 | return false; |
05a98afd | 421 | |
5afe510c LP |
422 | /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */ |
423 | switch (u->collect_mode) { | |
424 | ||
425 | case COLLECT_INACTIVE: | |
426 | if (state != UNIT_INACTIVE) | |
f2f725e5 | 427 | return false; |
5afe510c LP |
428 | |
429 | break; | |
430 | ||
431 | case COLLECT_INACTIVE_OR_FAILED: | |
432 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
f2f725e5 | 433 | return false; |
5afe510c LP |
434 | |
435 | break; | |
436 | ||
437 | default: | |
04499a70 | 438 | assert_not_reached(); |
5afe510c LP |
439 | } |
440 | ||
02de9614 ZJS |
441 | /* Check if any OnFailure= or on Success= jobs may be pending */ |
442 | if (unit_success_failure_handler_has_jobs(u)) | |
443 | return false; | |
444 | ||
e98b2fbb LP |
445 | if (u->cgroup_path) { |
446 | /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay | |
447 | * around. Units with active processes should never be collected. */ | |
448 | ||
449 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
450 | if (r < 0) | |
6178e2f8 | 451 | log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", empty_to_root(u->cgroup_path)); |
e98b2fbb | 452 | if (r <= 0) |
f2f725e5 | 453 | return false; |
e98b2fbb LP |
454 | } |
455 | ||
f2f725e5 ZJS |
456 | if (UNIT_VTABLE(u)->may_gc && !UNIT_VTABLE(u)->may_gc(u)) |
457 | return false; | |
701cc384 | 458 | |
f2f725e5 | 459 | return true; |
701cc384 LP |
460 | } |
461 | ||
87f0e418 LP |
462 | void unit_add_to_load_queue(Unit *u) { |
463 | assert(u); | |
ac155bb8 | 464 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 465 | |
ac155bb8 | 466 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
467 | return; |
468 | ||
71fda00f | 469 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 470 | u->in_load_queue = true; |
87f0e418 LP |
471 | } |
472 | ||
23a177ef LP |
473 | void unit_add_to_cleanup_queue(Unit *u) { |
474 | assert(u); | |
475 | ||
ac155bb8 | 476 | if (u->in_cleanup_queue) |
23a177ef LP |
477 | return; |
478 | ||
71fda00f | 479 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 480 | u->in_cleanup_queue = true; |
23a177ef LP |
481 | } |
482 | ||
701cc384 LP |
483 | void unit_add_to_gc_queue(Unit *u) { |
484 | assert(u); | |
485 | ||
ac155bb8 | 486 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
487 | return; |
488 | ||
f2f725e5 | 489 | if (!unit_may_gc(u)) |
701cc384 LP |
490 | return; |
491 | ||
c5a97ed1 | 492 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 493 | u->in_gc_queue = true; |
701cc384 LP |
494 | } |
495 | ||
c1e1601e LP |
496 | void unit_add_to_dbus_queue(Unit *u) { |
497 | assert(u); | |
ac155bb8 | 498 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 499 | |
ac155bb8 | 500 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
501 | return; |
502 | ||
a567261a | 503 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 504 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 505 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 506 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 507 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
508 | return; |
509 | } | |
510 | ||
71fda00f | 511 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 512 | u->in_dbus_queue = true; |
c1e1601e LP |
513 | } |
514 | ||
fda09318 | 515 | void unit_submit_to_stop_when_unneeded_queue(Unit *u) { |
a3c1168a LP |
516 | assert(u); |
517 | ||
518 | if (u->in_stop_when_unneeded_queue) | |
519 | return; | |
520 | ||
521 | if (!u->stop_when_unneeded) | |
522 | return; | |
523 | ||
524 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
525 | return; | |
526 | ||
527 | LIST_PREPEND(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
528 | u->in_stop_when_unneeded_queue = true; | |
529 | } | |
530 | ||
0bc488c9 LP |
531 | void unit_submit_to_start_when_upheld_queue(Unit *u) { |
532 | assert(u); | |
533 | ||
534 | if (u->in_start_when_upheld_queue) | |
535 | return; | |
536 | ||
537 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u))) | |
538 | return; | |
539 | ||
540 | if (!unit_has_dependency(u, UNIT_ATOM_START_STEADILY, NULL)) | |
541 | return; | |
542 | ||
543 | LIST_PREPEND(start_when_upheld_queue, u->manager->start_when_upheld_queue, u); | |
544 | u->in_start_when_upheld_queue = true; | |
545 | } | |
546 | ||
56c59592 LP |
547 | void unit_submit_to_stop_when_bound_queue(Unit *u) { |
548 | assert(u); | |
549 | ||
550 | if (u->in_stop_when_bound_queue) | |
551 | return; | |
552 | ||
553 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
554 | return; | |
555 | ||
556 | if (!unit_has_dependency(u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT, NULL)) | |
557 | return; | |
558 | ||
559 | LIST_PREPEND(stop_when_bound_queue, u->manager->stop_when_bound_queue, u); | |
560 | u->in_stop_when_bound_queue = true; | |
561 | } | |
562 | ||
15ed3c3a | 563 | static void unit_clear_dependencies(Unit *u) { |
87f0e418 LP |
564 | assert(u); |
565 | ||
15ed3c3a LP |
566 | /* Removes all dependencies configured on u and their reverse dependencies. */ |
567 | ||
568 | for (Hashmap *deps; (deps = hashmap_steal_first(u->dependencies));) { | |
87f0e418 | 569 | |
15ed3c3a LP |
570 | for (Unit *other; (other = hashmap_steal_first_key(deps));) { |
571 | Hashmap *other_deps; | |
701cc384 | 572 | |
15ed3c3a LP |
573 | HASHMAP_FOREACH(other_deps, other->dependencies) |
574 | hashmap_remove(other_deps, u); | |
575 | ||
576 | unit_add_to_gc_queue(other); | |
577 | } | |
578 | ||
579 | hashmap_free(deps); | |
87f0e418 LP |
580 | } |
581 | ||
15ed3c3a | 582 | u->dependencies = hashmap_free(u->dependencies); |
87f0e418 LP |
583 | } |
584 | ||
c2756a68 | 585 | static void unit_remove_transient(Unit *u) { |
c2756a68 LP |
586 | assert(u); |
587 | ||
588 | if (!u->transient) | |
589 | return; | |
590 | ||
591 | if (u->fragment_path) | |
3f5e8115 | 592 | (void) unlink(u->fragment_path); |
c2756a68 LP |
593 | |
594 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 595 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 596 | |
39591351 LP |
597 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
598 | if (!p) | |
599 | continue; | |
600 | ||
601 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
602 | if (!pp) | |
603 | continue; | |
604 | ||
605 | /* Only drop transient drop-ins */ | |
606 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
607 | continue; | |
c2756a68 | 608 | |
39591351 LP |
609 | (void) unlink(*i); |
610 | (void) rmdir(p); | |
c2756a68 LP |
611 | } |
612 | } | |
613 | ||
a57f7e2c | 614 | static void unit_free_requires_mounts_for(Unit *u) { |
eef85c4a | 615 | assert(u); |
a57f7e2c | 616 | |
eef85c4a | 617 | for (;;) { |
c2b2df60 | 618 | _cleanup_free_ char *path = NULL; |
a57f7e2c | 619 | |
eef85c4a LP |
620 | path = hashmap_steal_first_key(u->requires_mounts_for); |
621 | if (!path) | |
622 | break; | |
623 | else { | |
624 | char s[strlen(path) + 1]; | |
a57f7e2c | 625 | |
eef85c4a LP |
626 | PATH_FOREACH_PREFIX_MORE(s, path) { |
627 | char *y; | |
628 | Set *x; | |
629 | ||
630 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
631 | if (!x) | |
632 | continue; | |
a57f7e2c | 633 | |
eef85c4a | 634 | (void) set_remove(x, u); |
a57f7e2c | 635 | |
eef85c4a LP |
636 | if (set_isempty(x)) { |
637 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
638 | free(y); | |
639 | set_free(x); | |
640 | } | |
a57f7e2c LP |
641 | } |
642 | } | |
643 | } | |
644 | ||
eef85c4a | 645 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
a57f7e2c LP |
646 | } |
647 | ||
598459ce LP |
648 | static void unit_done(Unit *u) { |
649 | ExecContext *ec; | |
650 | CGroupContext *cc; | |
651 | ||
652 | assert(u); | |
653 | ||
654 | if (u->type < 0) | |
655 | return; | |
656 | ||
657 | if (UNIT_VTABLE(u)->done) | |
658 | UNIT_VTABLE(u)->done(u); | |
659 | ||
660 | ec = unit_get_exec_context(u); | |
661 | if (ec) | |
662 | exec_context_done(ec); | |
663 | ||
664 | cc = unit_get_cgroup_context(u); | |
665 | if (cc) | |
666 | cgroup_context_done(cc); | |
667 | } | |
668 | ||
75db809a | 669 | Unit* unit_free(Unit *u) { |
12f64221 | 670 | Unit *slice; |
87f0e418 LP |
671 | char *t; |
672 | ||
c9d5c9c0 | 673 | if (!u) |
75db809a | 674 | return NULL; |
87f0e418 | 675 | |
50fb00b7 | 676 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 677 | |
2c289ea8 | 678 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
679 | unit_remove_transient(u); |
680 | ||
c1e1601e LP |
681 | bus_unit_send_removed_signal(u); |
682 | ||
598459ce | 683 | unit_done(u); |
a013b84b | 684 | |
50be4f4a | 685 | unit_dequeue_rewatch_pids(u); |
cf9fd508 | 686 | |
73458283 YW |
687 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
688 | u->bus_track = sd_bus_track_unref(u->bus_track); | |
05a98afd | 689 | u->deserialized_refs = strv_free(u->deserialized_refs); |
d9e45bc3 | 690 | u->pending_freezer_message = sd_bus_message_unref(u->pending_freezer_message); |
05a98afd | 691 | |
a57f7e2c LP |
692 | unit_free_requires_mounts_for(u); |
693 | ||
90e74a66 | 694 | SET_FOREACH(t, u->aliases) |
ac155bb8 | 695 | hashmap_remove_value(u->manager->units, t, u); |
4562c355 ZJS |
696 | if (u->id) |
697 | hashmap_remove_value(u->manager->units, u->id, u); | |
87f0e418 | 698 | |
4b58153d LP |
699 | if (!sd_id128_is_null(u->invocation_id)) |
700 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
701 | ||
97e7d748 MS |
702 | if (u->job) { |
703 | Job *j = u->job; | |
704 | job_uninstall(j); | |
705 | job_free(j); | |
706 | } | |
964e0949 | 707 | |
e0209d83 MS |
708 | if (u->nop_job) { |
709 | Job *j = u->nop_job; | |
710 | job_uninstall(j); | |
711 | job_free(j); | |
712 | } | |
713 | ||
4c591f39 MK |
714 | /* A unit is being dropped from the tree, make sure our family is realized properly. Do this after we |
715 | * detach the unit from slice tree in order to eliminate its effect on controller masks. */ | |
12f64221 | 716 | slice = UNIT_GET_SLICE(u); |
d219a2b0 | 717 | unit_clear_dependencies(u); |
12f64221 LP |
718 | if (slice) |
719 | unit_add_family_to_cgroup_realize_queue(slice); | |
fb46fca7 | 720 | |
adefcf28 LP |
721 | if (u->on_console) |
722 | manager_unref_console(u->manager); | |
723 | ||
3d027d4d JK |
724 | |
725 | fdset_free(u->initial_socket_bind_link_fds); | |
91ce91c7 JK |
726 | #if BPF_FRAMEWORK |
727 | bpf_link_free(u->ipv4_socket_bind_link); | |
728 | bpf_link_free(u->ipv6_socket_bind_link); | |
729 | #endif | |
730 | ||
efdb0237 | 731 | unit_release_cgroup(u); |
72673e86 | 732 | |
d3070fbd LP |
733 | if (!MANAGER_IS_RELOADING(u->manager)) |
734 | unit_unlink_state_files(u); | |
735 | ||
00d9ef85 LP |
736 | unit_unref_uid_gid(u, false); |
737 | ||
5269eb6b | 738 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 739 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 740 | |
a911bb9a LP |
741 | unit_unwatch_all_pids(u); |
742 | ||
7f7d01ed ZJS |
743 | while (u->refs_by_target) |
744 | unit_ref_unset(u->refs_by_target); | |
57020a3a | 745 | |
ac155bb8 | 746 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 747 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 748 | |
ac155bb8 | 749 | if (u->in_load_queue) |
71fda00f | 750 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 751 | |
ac155bb8 | 752 | if (u->in_dbus_queue) |
71fda00f | 753 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 754 | |
13e72103 MK |
755 | if (u->in_cleanup_queue) |
756 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
757 | ||
a2d72e26 | 758 | if (u->in_gc_queue) |
c5a97ed1 | 759 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 760 | |
91a6073e LP |
761 | if (u->in_cgroup_realize_queue) |
762 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 763 | |
09e24654 LP |
764 | if (u->in_cgroup_empty_queue) |
765 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
766 | ||
13e72103 MK |
767 | if (u->in_cgroup_oom_queue) |
768 | LIST_REMOVE(cgroup_oom_queue, u->manager->cgroup_oom_queue, u); | |
adefcf28 | 769 | |
19496554 MS |
770 | if (u->in_target_deps_queue) |
771 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
772 | ||
a3c1168a LP |
773 | if (u->in_stop_when_unneeded_queue) |
774 | LIST_REMOVE(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
775 | ||
0bc488c9 LP |
776 | if (u->in_start_when_upheld_queue) |
777 | LIST_REMOVE(start_when_upheld_queue, u->manager->start_when_upheld_queue, u); | |
778 | ||
56c59592 LP |
779 | if (u->in_stop_when_bound_queue) |
780 | LIST_REMOVE(stop_when_bound_queue, u->manager->stop_when_bound_queue, u); | |
781 | ||
0fd9c28c | 782 | bpf_firewall_close(u); |
fab34748 | 783 | |
5f8ba20d JK |
784 | hashmap_free(u->bpf_foreign_by_key); |
785 | ||
76dc1725 | 786 | bpf_program_free(u->bpf_device_control_installed); |
084c7007 | 787 | |
6f50d4f7 MV |
788 | #if BPF_FRAMEWORK |
789 | bpf_link_free(u->restrict_ifaces_ingress_bpf_link); | |
790 | bpf_link_free(u->restrict_ifaces_egress_bpf_link); | |
791 | #endif | |
792 | fdset_free(u->initial_restric_ifaces_link_fds); | |
793 | ||
a946fa9b ZJS |
794 | condition_free_list(u->conditions); |
795 | condition_free_list(u->asserts); | |
f755e3b7 | 796 | |
ac155bb8 | 797 | free(u->description); |
49dbfa7b | 798 | strv_free(u->documentation); |
ac155bb8 | 799 | free(u->fragment_path); |
1b64d026 | 800 | free(u->source_path); |
ae7a7182 | 801 | strv_free(u->dropin_paths); |
ac155bb8 | 802 | free(u->instance); |
87f0e418 | 803 | |
f189ab18 | 804 | free(u->job_timeout_reboot_arg); |
6bf0f408 LP |
805 | free(u->reboot_arg); |
806 | ||
23e9a7dd LP |
807 | free(u->access_selinux_context); |
808 | ||
4562c355 ZJS |
809 | set_free_free(u->aliases); |
810 | free(u->id); | |
811 | ||
75db809a | 812 | return mfree(u); |
87f0e418 LP |
813 | } |
814 | ||
d9e45bc3 MS |
815 | FreezerState unit_freezer_state(Unit *u) { |
816 | assert(u); | |
817 | ||
818 | return u->freezer_state; | |
819 | } | |
820 | ||
821 | int unit_freezer_state_kernel(Unit *u, FreezerState *ret) { | |
822 | char *values[1] = {}; | |
823 | int r; | |
824 | ||
825 | assert(u); | |
826 | ||
827 | r = cg_get_keyed_attribute(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "cgroup.events", | |
828 | STRV_MAKE("frozen"), values); | |
829 | if (r < 0) | |
830 | return r; | |
831 | ||
832 | r = _FREEZER_STATE_INVALID; | |
833 | ||
834 | if (values[0]) { | |
835 | if (streq(values[0], "0")) | |
836 | r = FREEZER_RUNNING; | |
837 | else if (streq(values[0], "1")) | |
838 | r = FREEZER_FROZEN; | |
839 | } | |
840 | ||
841 | free(values[0]); | |
842 | *ret = r; | |
843 | ||
844 | return 0; | |
845 | } | |
846 | ||
87f0e418 LP |
847 | UnitActiveState unit_active_state(Unit *u) { |
848 | assert(u); | |
849 | ||
ac155bb8 | 850 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
851 | return unit_active_state(unit_follow_merge(u)); |
852 | ||
853 | /* After a reload it might happen that a unit is not correctly | |
854 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 855 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
856 | |
857 | return UNIT_VTABLE(u)->active_state(u); | |
858 | } | |
859 | ||
10a94420 LP |
860 | const char* unit_sub_state_to_string(Unit *u) { |
861 | assert(u); | |
862 | ||
863 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
864 | } | |
865 | ||
15ed3c3a | 866 | static int unit_merge_names(Unit *u, Unit *other) { |
4562c355 | 867 | char *name; |
7c0b05e5 | 868 | int r; |
87f0e418 | 869 | |
23a177ef LP |
870 | assert(u); |
871 | assert(other); | |
872 | ||
4562c355 | 873 | r = unit_add_alias(u, other->id); |
7c0b05e5 MS |
874 | if (r < 0) |
875 | return r; | |
23a177ef | 876 | |
4562c355 ZJS |
877 | r = set_move(u->aliases, other->aliases); |
878 | if (r < 0) { | |
879 | set_remove(u->aliases, other->id); | |
880 | return r; | |
881 | } | |
23a177ef | 882 | |
4562c355 ZJS |
883 | TAKE_PTR(other->id); |
884 | other->aliases = set_free_free(other->aliases); | |
23a177ef | 885 | |
90e74a66 | 886 | SET_FOREACH(name, u->aliases) |
4562c355 | 887 | assert_se(hashmap_replace(u->manager->units, name, u) == 0); |
7c0b05e5 MS |
888 | |
889 | return 0; | |
87f0e418 LP |
890 | } |
891 | ||
15ed3c3a LP |
892 | static int unit_reserve_dependencies(Unit *u, Unit *other) { |
893 | size_t n_reserve; | |
894 | Hashmap* deps; | |
895 | void *d; | |
896 | int r; | |
09a65f92 MS |
897 | |
898 | assert(u); | |
899 | assert(other); | |
09a65f92 | 900 | |
15ed3c3a LP |
901 | /* Let's reserve some space in the dependency hashmaps so that later on merging the units cannot |
902 | * fail. | |
903 | * | |
904 | * First make some room in the per dependency type hashmaps. Using the summed size of both unit's | |
905 | * hashmaps is an estimate that is likely too high since they probably use some of the same | |
906 | * types. But it's never too low, and that's all we need. */ | |
907 | ||
908 | n_reserve = MIN(hashmap_size(other->dependencies), LESS_BY((size_t) _UNIT_DEPENDENCY_MAX, hashmap_size(u->dependencies))); | |
909 | if (n_reserve > 0) { | |
910 | r = hashmap_ensure_allocated(&u->dependencies, NULL); | |
911 | if (r < 0) | |
912 | return r; | |
913 | ||
914 | r = hashmap_reserve(u->dependencies, n_reserve); | |
915 | if (r < 0) | |
916 | return r; | |
917 | } | |
918 | ||
919 | /* Now, enlarge our per dependency type hashmaps by the number of entries in the same hashmap of the | |
920 | * other unit's dependencies. | |
921 | * | |
922 | * NB: If u does not have a dependency set allocated for some dependency type, there is no need to | |
923 | * reserve anything for. In that case other's set will be transferred as a whole to u by | |
924 | * complete_move(). */ | |
925 | ||
926 | HASHMAP_FOREACH_KEY(deps, d, u->dependencies) { | |
927 | Hashmap *other_deps; | |
928 | ||
929 | other_deps = hashmap_get(other->dependencies, d); | |
930 | ||
931 | r = hashmap_reserve(deps, hashmap_size(other_deps)); | |
932 | if (r < 0) | |
933 | return r; | |
934 | } | |
935 | ||
936 | return 0; | |
937 | } | |
938 | ||
939 | static void unit_maybe_warn_about_dependency( | |
940 | Unit *u, | |
941 | const char *other_id, | |
942 | UnitDependency dependency) { | |
943 | ||
944 | assert(u); | |
945 | ||
946 | /* Only warn about some unit types */ | |
947 | if (!IN_SET(dependency, | |
948 | UNIT_CONFLICTS, | |
949 | UNIT_CONFLICTED_BY, | |
950 | UNIT_BEFORE, | |
951 | UNIT_AFTER, | |
294446dc | 952 | UNIT_ON_SUCCESS, |
15ed3c3a LP |
953 | UNIT_ON_FAILURE, |
954 | UNIT_TRIGGERS, | |
955 | UNIT_TRIGGERED_BY)) | |
956 | return; | |
957 | ||
958 | if (streq_ptr(u->id, other_id)) | |
959 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
960 | else | |
961 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other_id), u->id); | |
962 | } | |
963 | ||
964 | static int unit_per_dependency_type_hashmap_update( | |
965 | Hashmap *per_type, | |
966 | Unit *other, | |
967 | UnitDependencyMask origin_mask, | |
968 | UnitDependencyMask destination_mask) { | |
969 | ||
970 | UnitDependencyInfo info; | |
971 | int r; | |
972 | ||
973 | assert(other); | |
974 | assert_cc(sizeof(void*) == sizeof(info)); | |
975 | ||
976 | /* Acquire the UnitDependencyInfo entry for the Unit* we are interested in, and update it if it | |
977 | * exists, or insert it anew if not. */ | |
09a65f92 | 978 | |
15ed3c3a LP |
979 | info.data = hashmap_get(per_type, other); |
980 | if (info.data) { | |
981 | /* Entry already exists. Add in our mask. */ | |
982 | ||
983 | if (FLAGS_SET(origin_mask, info.origin_mask) && | |
984 | FLAGS_SET(destination_mask, info.destination_mask)) | |
985 | return 0; /* NOP */ | |
986 | ||
987 | info.origin_mask |= origin_mask; | |
988 | info.destination_mask |= destination_mask; | |
989 | ||
990 | r = hashmap_update(per_type, other, info.data); | |
991 | } else { | |
992 | info = (UnitDependencyInfo) { | |
993 | .origin_mask = origin_mask, | |
994 | .destination_mask = destination_mask, | |
995 | }; | |
09a65f92 | 996 | |
15ed3c3a LP |
997 | r = hashmap_put(per_type, other, info.data); |
998 | } | |
999 | if (r < 0) | |
1000 | return r; | |
1001 | ||
1002 | ||
1003 | return 1; | |
09a65f92 MS |
1004 | } |
1005 | ||
15ed3c3a LP |
1006 | static int unit_add_dependency_hashmap( |
1007 | Hashmap **dependencies, | |
1008 | UnitDependency d, | |
1009 | Unit *other, | |
1010 | UnitDependencyMask origin_mask, | |
1011 | UnitDependencyMask destination_mask) { | |
1012 | ||
1013 | Hashmap *per_type; | |
87f0e418 | 1014 | int r; |
23a177ef | 1015 | |
15ed3c3a LP |
1016 | assert(dependencies); |
1017 | assert(other); | |
1018 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
1019 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
1020 | assert(origin_mask > 0 || destination_mask > 0); | |
1021 | ||
1022 | /* Ensure the top-level dependency hashmap exists that maps UnitDependency → Hashmap(Unit* → | |
1023 | * UnitDependencyInfo) */ | |
1024 | r = hashmap_ensure_allocated(dependencies, NULL); | |
1025 | if (r < 0) | |
1026 | return r; | |
1027 | ||
1028 | /* Acquire the inner hashmap, that maps Unit* → UnitDependencyInfo, for the specified dependency | |
1029 | * type, and if it's missing allocate it and insert it. */ | |
1030 | per_type = hashmap_get(*dependencies, UNIT_DEPENDENCY_TO_PTR(d)); | |
1031 | if (!per_type) { | |
1032 | per_type = hashmap_new(NULL); | |
1033 | if (!per_type) | |
1034 | return -ENOMEM; | |
1035 | ||
1036 | r = hashmap_put(*dependencies, UNIT_DEPENDENCY_TO_PTR(d), per_type); | |
1037 | if (r < 0) { | |
1038 | hashmap_free(per_type); | |
1039 | return r; | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | return unit_per_dependency_type_hashmap_update(per_type, other, origin_mask, destination_mask); | |
1044 | } | |
1045 | ||
1046 | static void unit_merge_dependencies( | |
1047 | Unit *u, | |
1048 | Unit *other) { | |
1049 | ||
1050 | int r; | |
eef85c4a | 1051 | |
23a177ef LP |
1052 | assert(u); |
1053 | assert(other); | |
23a177ef | 1054 | |
15ed3c3a LP |
1055 | if (u == other) |
1056 | return; | |
1057 | ||
1058 | for (;;) { | |
1059 | _cleanup_(hashmap_freep) Hashmap *other_deps = NULL; | |
1060 | UnitDependencyInfo di_back; | |
1061 | Unit *back; | |
1062 | void *dt; /* Actually of type UnitDependency, except that we don't bother casting it here, | |
1063 | * since the hashmaps all want it as void pointer. */ | |
1064 | ||
1065 | /* Let's focus on one dependency type at a time, that 'other' has defined. */ | |
1066 | other_deps = hashmap_steal_first_key_and_value(other->dependencies, &dt); | |
1067 | if (!other_deps) | |
1068 | break; /* done! */ | |
1069 | ||
1070 | /* Now iterate through all dependencies of this dependency type, of 'other'. We refer to the | |
1071 | * referenced units as 'back'. */ | |
1072 | HASHMAP_FOREACH_KEY(di_back.data, back, other_deps) { | |
1073 | Hashmap *back_deps; | |
1074 | void *back_dt; | |
eef85c4a | 1075 | |
e66047ff | 1076 | if (back == u) { |
15ed3c3a LP |
1077 | /* This is a dependency pointing back to the unit we want to merge with? |
1078 | * Suppress it (but warn) */ | |
1079 | unit_maybe_warn_about_dependency(u, other->id, UNIT_DEPENDENCY_FROM_PTR(dt)); | |
1080 | continue; | |
1081 | } | |
eef85c4a | 1082 | |
15ed3c3a LP |
1083 | /* Now iterate through all deps of 'back', and fix the ones pointing to 'other' to |
1084 | * point to 'u' instead. */ | |
1085 | HASHMAP_FOREACH_KEY(back_deps, back_dt, back->dependencies) { | |
1086 | UnitDependencyInfo di_move; | |
eef85c4a | 1087 | |
15ed3c3a LP |
1088 | di_move.data = hashmap_remove(back_deps, other); |
1089 | if (!di_move.data) | |
1090 | continue; | |
eef85c4a | 1091 | |
15ed3c3a LP |
1092 | assert_se(unit_per_dependency_type_hashmap_update( |
1093 | back_deps, | |
1094 | u, | |
1095 | di_move.origin_mask, | |
1096 | di_move.destination_mask) >= 0); | |
1097 | } | |
1098 | } | |
eef85c4a | 1099 | |
15ed3c3a LP |
1100 | /* Now all references towards 'other' of the current type 'dt' are corrected to point to |
1101 | * 'u'. Lets's now move the deps of type 'dt' from 'other' to 'u'. First, let's try to move | |
1102 | * them per type wholesale. */ | |
1103 | r = hashmap_put(u->dependencies, dt, other_deps); | |
1104 | if (r == -EEXIST) { | |
1105 | Hashmap *deps; | |
eef85c4a | 1106 | |
15ed3c3a | 1107 | /* The target unit already has dependencies of this type, let's then merge this individually. */ |
eef85c4a | 1108 | |
15ed3c3a LP |
1109 | assert_se(deps = hashmap_get(u->dependencies, dt)); |
1110 | ||
1111 | for (;;) { | |
1112 | UnitDependencyInfo di_move; | |
1113 | ||
1114 | /* Get first dep */ | |
1115 | di_move.data = hashmap_steal_first_key_and_value(other_deps, (void**) &back); | |
1116 | if (!di_move.data) | |
1117 | break; /* done */ | |
1118 | if (back == u) { | |
1119 | /* Would point back to us, ignore */ | |
1120 | unit_maybe_warn_about_dependency(u, other->id, UNIT_DEPENDENCY_FROM_PTR(dt)); | |
1121 | continue; | |
1122 | } | |
23a177ef | 1123 | |
15ed3c3a LP |
1124 | assert_se(unit_per_dependency_type_hashmap_update(deps, back, di_move.origin_mask, di_move.destination_mask) >= 0); |
1125 | } | |
1126 | } else { | |
1127 | assert_se(r >= 0); | |
1128 | TAKE_PTR(other_deps); | |
e66047ff | 1129 | |
15ed3c3a LP |
1130 | if (hashmap_remove(other_deps, u)) |
1131 | unit_maybe_warn_about_dependency(u, other->id, UNIT_DEPENDENCY_FROM_PTR(dt)); | |
1132 | } | |
1133 | } | |
23a177ef | 1134 | |
15ed3c3a | 1135 | other->dependencies = hashmap_free(other->dependencies); |
23a177ef LP |
1136 | } |
1137 | ||
1138 | int unit_merge(Unit *u, Unit *other) { | |
09a65f92 | 1139 | int r; |
87f0e418 LP |
1140 | |
1141 | assert(u); | |
1142 | assert(other); | |
ac155bb8 MS |
1143 | assert(u->manager == other->manager); |
1144 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 1145 | |
cc916967 LP |
1146 | other = unit_follow_merge(other); |
1147 | ||
23a177ef LP |
1148 | if (other == u) |
1149 | return 0; | |
1150 | ||
ac155bb8 | 1151 | if (u->type != other->type) |
9e2f7c11 LP |
1152 | return -EINVAL; |
1153 | ||
8a993b61 | 1154 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
1155 | return -EEXIST; |
1156 | ||
ec2ce0c5 | 1157 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 1158 | return -EEXIST; |
87f0e418 | 1159 | |
d383acad ZJS |
1160 | if (!streq_ptr(u->instance, other->instance)) |
1161 | return -EINVAL; | |
1162 | ||
ac155bb8 | 1163 | if (other->job) |
819e213f LP |
1164 | return -EEXIST; |
1165 | ||
e0209d83 MS |
1166 | if (other->nop_job) |
1167 | return -EEXIST; | |
1168 | ||
fdf20a31 | 1169 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
1170 | return -EEXIST; |
1171 | ||
15ed3c3a LP |
1172 | /* Make reservations to ensure merge_dependencies() won't fail. We don't rollback reservations if we |
1173 | * fail. We don't have a way to undo reservations. A reservation is not a leak. */ | |
1174 | r = unit_reserve_dependencies(u, other); | |
1175 | if (r < 0) | |
1176 | return r; | |
09a65f92 | 1177 | |
87f0e418 | 1178 | /* Merge names */ |
15ed3c3a | 1179 | r = unit_merge_names(u, other); |
7c0b05e5 MS |
1180 | if (r < 0) |
1181 | return r; | |
87f0e418 | 1182 | |
57020a3a | 1183 | /* Redirect all references */ |
7f7d01ed ZJS |
1184 | while (other->refs_by_target) |
1185 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
57020a3a | 1186 | |
87f0e418 | 1187 | /* Merge dependencies */ |
15ed3c3a | 1188 | unit_merge_dependencies(u, other); |
87f0e418 | 1189 | |
ac155bb8 MS |
1190 | other->load_state = UNIT_MERGED; |
1191 | other->merged_into = u; | |
23a177ef | 1192 | |
3616a49c LP |
1193 | /* If there is still some data attached to the other node, we |
1194 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 1195 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
1196 | if (UNIT_VTABLE(other)->done) |
1197 | UNIT_VTABLE(other)->done(other); | |
1198 | ||
1199 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
1200 | unit_add_to_cleanup_queue(other); |
1201 | ||
1202 | return 0; | |
1203 | } | |
1204 | ||
1205 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 1206 | _cleanup_free_ char *s = NULL; |
23a177ef | 1207 | Unit *other; |
9e2f7c11 | 1208 | int r; |
23a177ef | 1209 | |
e8630e69 ZJS |
1210 | /* Either add name to u, or if a unit with name already exists, merge it with u. |
1211 | * If name is a template, do the same for name@instance, where instance is u's instance. */ | |
1212 | ||
23a177ef LP |
1213 | assert(u); |
1214 | assert(name); | |
1215 | ||
7410616c | 1216 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 1217 | if (!u->instance) |
9e2f7c11 LP |
1218 | return -EINVAL; |
1219 | ||
7410616c LP |
1220 | r = unit_name_replace_instance(name, u->instance, &s); |
1221 | if (r < 0) | |
1222 | return r; | |
9e2f7c11 LP |
1223 | |
1224 | name = s; | |
1225 | } | |
1226 | ||
c2756a68 | 1227 | other = manager_get_unit(u->manager, name); |
7410616c LP |
1228 | if (other) |
1229 | return unit_merge(u, other); | |
23a177ef | 1230 | |
7410616c | 1231 | return unit_add_name(u, name); |
23a177ef LP |
1232 | } |
1233 | ||
1234 | Unit* unit_follow_merge(Unit *u) { | |
1235 | assert(u); | |
1236 | ||
ac155bb8 MS |
1237 | while (u->load_state == UNIT_MERGED) |
1238 | assert_se(u = u->merged_into); | |
23a177ef LP |
1239 | |
1240 | return u; | |
1241 | } | |
1242 | ||
1243 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
1244 | int r; | |
1245 | ||
1246 | assert(u); | |
1247 | assert(c); | |
1248 | ||
a8c5a4c6 YW |
1249 | /* Unlike unit_add_dependency() or friends, this always returns 0 on success. */ |
1250 | ||
e1e74614 | 1251 | if (c->working_directory && !c->working_directory_missing_ok) { |
eef85c4a | 1252 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1253 | if (r < 0) |
1254 | return r; | |
1255 | } | |
1256 | ||
1257 | if (c->root_directory) { | |
eef85c4a | 1258 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1259 | if (r < 0) |
1260 | return r; | |
1261 | } | |
1262 | ||
915e6d16 | 1263 | if (c->root_image) { |
eef85c4a | 1264 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
1265 | if (r < 0) |
1266 | return r; | |
1267 | } | |
1268 | ||
12375b95 | 1269 | for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
1270 | if (!u->manager->prefix[dt]) |
1271 | continue; | |
1272 | ||
211a3d87 | 1273 | for (size_t i = 0; i < c->directories[dt].n_items; i++) { |
c2b2df60 | 1274 | _cleanup_free_ char *p = NULL; |
ada5e276 | 1275 | |
211a3d87 | 1276 | p = path_join(u->manager->prefix[dt], c->directories[dt].items[i].path); |
ada5e276 YW |
1277 | if (!p) |
1278 | return -ENOMEM; | |
1279 | ||
eef85c4a | 1280 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
1281 | if (r < 0) |
1282 | return r; | |
1283 | } | |
1284 | } | |
1285 | ||
463d0d15 | 1286 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
1287 | return 0; |
1288 | ||
f3b7a79b LP |
1289 | /* For the following three directory types we need write access, and /var/ is possibly on the root |
1290 | * fs. Hence order after systemd-remount-fs.service, to ensure things are writable. */ | |
211a3d87 LB |
1291 | if (c->directories[EXEC_DIRECTORY_STATE].n_items > 0 || |
1292 | c->directories[EXEC_DIRECTORY_CACHE].n_items > 0 || | |
1293 | c->directories[EXEC_DIRECTORY_LOGS].n_items > 0) { | |
f3b7a79b LP |
1294 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, true, UNIT_DEPENDENCY_FILE); |
1295 | if (r < 0) | |
1296 | return r; | |
1297 | } | |
1298 | ||
b46a529c | 1299 | if (c->private_tmp) { |
d71f0505 | 1300 | |
b2c7d1bb FB |
1301 | /* FIXME: for now we make a special case for /tmp and add a weak dependency on |
1302 | * tmp.mount so /tmp being masked is supported. However there's no reason to treat | |
1303 | * /tmp specifically and masking other mount units should be handled more | |
1304 | * gracefully too, see PR#16894. */ | |
1305 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "tmp.mount", true, UNIT_DEPENDENCY_FILE); | |
1306 | if (r < 0) | |
1307 | return r; | |
1308 | ||
1309 | r = unit_require_mounts_for(u, "/var/tmp", UNIT_DEPENDENCY_FILE); | |
1310 | if (r < 0) | |
1311 | return r; | |
b46a529c | 1312 | |
35d8c19a | 1313 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1314 | if (r < 0) |
1315 | return r; | |
1316 | } | |
1317 | ||
33b58dfb LP |
1318 | if (c->root_image) { |
1319 | /* We need to wait for /dev/loopX to appear when doing RootImage=, hence let's add an | |
1320 | * implicit dependency on udev */ | |
1321 | ||
1322 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_UDEVD_SERVICE, true, UNIT_DEPENDENCY_FILE); | |
1323 | if (r < 0) | |
1324 | return r; | |
1325 | } | |
1326 | ||
52c239d7 LB |
1327 | if (!IN_SET(c->std_output, |
1328 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1329 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
52c239d7 LB |
1330 | !IN_SET(c->std_error, |
1331 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1332 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
91dd5f7c | 1333 | !c->log_namespace) |
23a177ef LP |
1334 | return 0; |
1335 | ||
91dd5f7c LP |
1336 | /* If syslog or kernel logging is requested (or log namespacing is), make sure our own logging daemon |
1337 | * is run first. */ | |
1338 | ||
1339 | if (c->log_namespace) { | |
dc5437c7 | 1340 | _cleanup_free_ char *socket_unit = NULL, *varlink_socket_unit = NULL; |
23a177ef | 1341 | |
91dd5f7c LP |
1342 | r = unit_name_build_from_type("systemd-journald", c->log_namespace, UNIT_SOCKET, &socket_unit); |
1343 | if (r < 0) | |
1344 | return r; | |
1345 | ||
1346 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, socket_unit, true, UNIT_DEPENDENCY_FILE); | |
1347 | if (r < 0) | |
1348 | return r; | |
dc5437c7 LP |
1349 | |
1350 | r = unit_name_build_from_type("systemd-journald-varlink", c->log_namespace, UNIT_SOCKET, &varlink_socket_unit); | |
1351 | if (r < 0) | |
1352 | return r; | |
1353 | ||
1354 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, varlink_socket_unit, true, UNIT_DEPENDENCY_FILE); | |
1355 | if (r < 0) | |
1356 | return r; | |
91dd5f7c LP |
1357 | } else |
1358 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, true, UNIT_DEPENDENCY_FILE); | |
b46a529c LP |
1359 | if (r < 0) |
1360 | return r; | |
23a177ef | 1361 | |
87f0e418 LP |
1362 | return 0; |
1363 | } | |
1364 | ||
04d232d8 | 1365 | const char* unit_description(Unit *u) { |
87f0e418 LP |
1366 | assert(u); |
1367 | ||
ac155bb8 MS |
1368 | if (u->description) |
1369 | return u->description; | |
87f0e418 | 1370 | |
ac155bb8 | 1371 | return strna(u->id); |
87f0e418 LP |
1372 | } |
1373 | ||
e6a16a82 | 1374 | const char* unit_status_string(Unit *u, char **ret_combined_buffer) { |
2a8f53c6 | 1375 | assert(u); |
04d232d8 | 1376 | assert(u->id); |
2a8f53c6 | 1377 | |
04d232d8 ZJS |
1378 | /* Return u->id, u->description, or "{u->id} - {u->description}". |
1379 | * Versions with u->description are only used if it is set. | |
e6a16a82 ZJS |
1380 | * The last option is used if configured and the caller provided the 'ret_combined_buffer' |
1381 | * pointer. | |
1382 | * | |
1383 | * Note that *ret_combined_buffer may be set to NULL. */ | |
04d232d8 ZJS |
1384 | |
1385 | if (!u->description || | |
1386 | u->manager->status_unit_format == STATUS_UNIT_FORMAT_NAME || | |
e6a16a82 ZJS |
1387 | (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED && !ret_combined_buffer) || |
1388 | streq(u->description, u->id)) { | |
1389 | ||
1390 | if (ret_combined_buffer) | |
1391 | *ret_combined_buffer = NULL; | |
2a8f53c6 | 1392 | return u->id; |
e6a16a82 | 1393 | } |
2a8f53c6 | 1394 | |
e6a16a82 ZJS |
1395 | if (ret_combined_buffer) { |
1396 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED) { | |
1397 | *ret_combined_buffer = strjoin(u->id, " - ", u->description); | |
1398 | if (*ret_combined_buffer) | |
1399 | return *ret_combined_buffer; | |
1400 | log_oom(); /* Fall back to ->description */ | |
04d232d8 | 1401 | } else |
e6a16a82 | 1402 | *ret_combined_buffer = NULL; |
04d232d8 ZJS |
1403 | } |
1404 | ||
1405 | return u->description; | |
2a8f53c6 ZJS |
1406 | } |
1407 | ||
87f0e418 | 1408 | /* Common implementation for multiple backends */ |
c3620770 | 1409 | int unit_load_fragment_and_dropin(Unit *u, bool fragment_required) { |
23a177ef LP |
1410 | int r; |
1411 | ||
1412 | assert(u); | |
23a177ef | 1413 | |
e48614c4 | 1414 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1415 | r = unit_load_fragment(u); |
1416 | if (r < 0) | |
23a177ef LP |
1417 | return r; |
1418 | ||
c3620770 ZJS |
1419 | if (u->load_state == UNIT_STUB) { |
1420 | if (fragment_required) | |
1421 | return -ENOENT; | |
1422 | ||
1423 | u->load_state = UNIT_LOADED; | |
1424 | } | |
23a177ef | 1425 | |
9e4ea9cc ZJS |
1426 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1427 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1428 | * been loaded and which not, at least without doing complicated book-keeping, | |
1429 | * so let's always reread all drop-ins. */ | |
c9e06956 ZJS |
1430 | r = unit_load_dropin(unit_follow_merge(u)); |
1431 | if (r < 0) | |
1432 | return r; | |
1433 | ||
1434 | if (u->source_path) { | |
1435 | struct stat st; | |
1436 | ||
1437 | if (stat(u->source_path, &st) >= 0) | |
1438 | u->source_mtime = timespec_load(&st.st_mtim); | |
1439 | else | |
1440 | u->source_mtime = 0; | |
1441 | } | |
1442 | ||
1443 | return 0; | |
23a177ef LP |
1444 | } |
1445 | ||
19496554 MS |
1446 | void unit_add_to_target_deps_queue(Unit *u) { |
1447 | Manager *m = u->manager; | |
1448 | ||
1449 | assert(u); | |
1450 | ||
1451 | if (u->in_target_deps_queue) | |
1452 | return; | |
1453 | ||
1454 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1455 | u->in_target_deps_queue = true; | |
1456 | } | |
1457 | ||
bba34eed | 1458 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1459 | assert(u); |
1460 | assert(target); | |
1461 | ||
ac155bb8 | 1462 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1463 | return 0; |
1464 | ||
35b8ca3a | 1465 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1466 | * that loop check below is reliable */ |
ac155bb8 MS |
1467 | if (u->load_state != UNIT_LOADED || |
1468 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1469 | return 0; |
1470 | ||
21256a2b LP |
1471 | /* If either side wants no automatic dependencies, then let's |
1472 | * skip this */ | |
ac155bb8 MS |
1473 | if (!u->default_dependencies || |
1474 | !target->default_dependencies) | |
21256a2b LP |
1475 | return 0; |
1476 | ||
98bc2000 | 1477 | /* Don't create loops */ |
15ed3c3a | 1478 | if (unit_has_dependency(target, UNIT_ATOM_BEFORE, u)) |
98bc2000 LP |
1479 | return 0; |
1480 | ||
eef85c4a | 1481 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1482 | } |
1483 | ||
e954c9cf | 1484 | static int unit_add_slice_dependencies(Unit *u) { |
12f64221 | 1485 | Unit *slice; |
e954c9cf | 1486 | assert(u); |
b81884e7 | 1487 | |
35b7ff80 | 1488 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1489 | return 0; |
1490 | ||
eef85c4a LP |
1491 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1492 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1493 | relationship). */ | |
f6173cb9 | 1494 | UnitDependencyMask mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; |
eef85c4a | 1495 | |
12f64221 LP |
1496 | slice = UNIT_GET_SLICE(u); |
1497 | if (slice) | |
1498 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, slice, true, mask); | |
e954c9cf | 1499 | |
8c8da0e0 | 1500 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1501 | return 0; |
1502 | ||
5a724170 | 1503 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, true, mask); |
98bc2000 LP |
1504 | } |
1505 | ||
e954c9cf | 1506 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1507 | UnitDependencyInfo di; |
1508 | const char *path; | |
a8c5a4c6 | 1509 | bool changed = false; |
9588bc32 LP |
1510 | int r; |
1511 | ||
1512 | assert(u); | |
1513 | ||
90e74a66 | 1514 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for) { |
eef85c4a | 1515 | char prefix[strlen(path) + 1]; |
9588bc32 | 1516 | |
eef85c4a | 1517 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1518 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1519 | Unit *m; |
1520 | ||
c7c89abb | 1521 | r = unit_name_from_path(prefix, ".mount", &p); |
03e52e8c | 1522 | if (r == -EINVAL) |
598a6a84 | 1523 | continue; /* If the path cannot be converted to a mount unit name, then it's |
4076ad9d | 1524 | * not manageable as a unit by systemd, and hence we don't need a |
598a6a84 | 1525 | * dependency on it. Let's thus silently ignore the issue. */ |
9588bc32 LP |
1526 | if (r < 0) |
1527 | return r; | |
c7c89abb FB |
1528 | |
1529 | m = manager_get_unit(u->manager, p); | |
1530 | if (!m) { | |
598a6a84 LP |
1531 | /* Make sure to load the mount unit if it exists. If so the dependencies on |
1532 | * this unit will be added later during the loading of the mount unit. */ | |
c7c89abb | 1533 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); |
9588bc32 | 1534 | continue; |
c7c89abb | 1535 | } |
9588bc32 LP |
1536 | if (m == u) |
1537 | continue; | |
1538 | ||
1539 | if (m->load_state != UNIT_LOADED) | |
1540 | continue; | |
1541 | ||
eef85c4a | 1542 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1543 | if (r < 0) |
1544 | return r; | |
a8c5a4c6 | 1545 | changed = changed || r > 0; |
9588bc32 LP |
1546 | |
1547 | if (m->fragment_path) { | |
eef85c4a | 1548 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1549 | if (r < 0) |
1550 | return r; | |
a8c5a4c6 | 1551 | changed = changed || r > 0; |
9588bc32 LP |
1552 | } |
1553 | } | |
1554 | } | |
1555 | ||
a8c5a4c6 | 1556 | return changed; |
9588bc32 LP |
1557 | } |
1558 | ||
a2db0225 AZ |
1559 | static int unit_add_oomd_dependencies(Unit *u) { |
1560 | CGroupContext *c; | |
1561 | bool wants_oomd; | |
a2db0225 AZ |
1562 | |
1563 | assert(u); | |
1564 | ||
1565 | if (!u->default_dependencies) | |
1566 | return 0; | |
1567 | ||
1568 | c = unit_get_cgroup_context(u); | |
1569 | if (!c) | |
1570 | return 0; | |
1571 | ||
1572 | wants_oomd = (c->moom_swap == MANAGED_OOM_KILL || c->moom_mem_pressure == MANAGED_OOM_KILL); | |
1573 | if (!wants_oomd) | |
1574 | return 0; | |
1575 | ||
a8c5a4c6 | 1576 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "systemd-oomd.service", true, UNIT_DEPENDENCY_FILE); |
a2db0225 AZ |
1577 | } |
1578 | ||
95ae05c0 | 1579 | static int unit_add_startup_units(Unit *u) { |
9dfb6a3a | 1580 | if (!unit_has_startup_cgroup_constraints(u)) |
db785129 LP |
1581 | return 0; |
1582 | ||
de7fef4b | 1583 | return set_ensure_put(&u->manager->startup_units, NULL, u); |
95ae05c0 WC |
1584 | } |
1585 | ||
294446dc LP |
1586 | static int unit_validate_on_failure_job_mode( |
1587 | Unit *u, | |
1588 | const char *job_mode_setting, | |
1589 | JobMode job_mode, | |
1590 | const char *dependency_name, | |
1591 | UnitDependencyAtom atom) { | |
1592 | ||
1593 | Unit *other, *found = NULL; | |
1594 | ||
1595 | if (job_mode != JOB_ISOLATE) | |
1596 | return 0; | |
1597 | ||
1598 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
1599 | if (!found) | |
1600 | found = other; | |
1601 | else if (found != other) | |
1602 | return log_unit_error_errno( | |
1603 | u, SYNTHETIC_ERRNO(ENOEXEC), | |
1604 | "More than one %s dependencies specified but %sisolate set. Refusing.", | |
1605 | dependency_name, job_mode_setting); | |
1606 | } | |
1607 | ||
1608 | return 0; | |
1609 | } | |
1610 | ||
87f0e418 LP |
1611 | int unit_load(Unit *u) { |
1612 | int r; | |
1613 | ||
1614 | assert(u); | |
1615 | ||
ac155bb8 | 1616 | if (u->in_load_queue) { |
71fda00f | 1617 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1618 | u->in_load_queue = false; |
87f0e418 LP |
1619 | } |
1620 | ||
ac155bb8 | 1621 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1622 | return -EINVAL; |
1623 | ||
ac155bb8 | 1624 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1625 | return 0; |
1626 | ||
4f4afc88 | 1627 | if (u->transient_file) { |
66fa4bdd LP |
1628 | /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup |
1629 | * is complete, hence let's synchronize the unit file we just wrote to disk. */ | |
1630 | ||
4f4afc88 LP |
1631 | r = fflush_and_check(u->transient_file); |
1632 | if (r < 0) | |
1633 | goto fail; | |
1634 | ||
50fb00b7 | 1635 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1636 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1637 | } |
1638 | ||
c3784a7d ZJS |
1639 | r = UNIT_VTABLE(u)->load(u); |
1640 | if (r < 0) | |
23a177ef | 1641 | goto fail; |
c3784a7d ZJS |
1642 | |
1643 | assert(u->load_state != UNIT_STUB); | |
23a177ef | 1644 | |
7c8fa05c | 1645 | if (u->load_state == UNIT_LOADED) { |
19496554 | 1646 | unit_add_to_target_deps_queue(u); |
e954c9cf LP |
1647 | |
1648 | r = unit_add_slice_dependencies(u); | |
1649 | if (r < 0) | |
1650 | goto fail; | |
c2756a68 | 1651 | |
e954c9cf | 1652 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1653 | if (r < 0) |
c2756a68 | 1654 | goto fail; |
7c8fa05c | 1655 | |
a2db0225 AZ |
1656 | r = unit_add_oomd_dependencies(u); |
1657 | if (r < 0) | |
1658 | goto fail; | |
1659 | ||
95ae05c0 WC |
1660 | r = unit_add_startup_units(u); |
1661 | if (r < 0) | |
1662 | goto fail; | |
1663 | ||
294446dc LP |
1664 | r = unit_validate_on_failure_job_mode(u, "OnSuccessJobMode=", u->on_success_job_mode, "OnSuccess=", UNIT_ATOM_ON_SUCCESS); |
1665 | if (r < 0) | |
1666 | goto fail; | |
15ed3c3a | 1667 | |
294446dc LP |
1668 | r = unit_validate_on_failure_job_mode(u, "OnFailureJobMode=", u->on_failure_job_mode, "OnFailure=", UNIT_ATOM_ON_FAILURE); |
1669 | if (r < 0) | |
1670 | goto fail; | |
bc432dc7 | 1671 | |
a2df3ea4 MK |
1672 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1673 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1674 | ||
5af88058 LP |
1675 | /* We finished loading, let's ensure our parents recalculate the members mask */ |
1676 | unit_invalidate_cgroup_members_masks(u); | |
f68319bb LP |
1677 | } |
1678 | ||
ac155bb8 | 1679 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1680 | |
1681 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1682 | unit_add_to_gc_queue(u); |
f561e8c6 | 1683 | (void) manager_varlink_send_managed_oom_update(u); |
87f0e418 | 1684 | |
87f0e418 LP |
1685 | return 0; |
1686 | ||
1687 | fail: | |
81be2388 ZJS |
1688 | /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code |
1689 | * should hence return ENOEXEC to ensure units are placed in this state after loading. */ | |
c4555ad8 LP |
1690 | |
1691 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : | |
1692 | r == -ENOEXEC ? UNIT_BAD_SETTING : | |
1693 | UNIT_ERROR; | |
ac155bb8 | 1694 | u->load_error = r; |
c4555ad8 | 1695 | |
c149d2b4 ZJS |
1696 | /* Record the timestamp on the cache, so that if the cache gets updated between now and the next time |
1697 | * an attempt is made to load this unit, we know we need to check again. */ | |
7233e91a | 1698 | if (u->load_state == UNIT_NOT_FOUND) |
c2911d48 | 1699 | u->fragment_not_found_timestamp_hash = u->manager->unit_cache_timestamp_hash; |
7233e91a | 1700 | |
c1e1601e | 1701 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1702 | unit_add_to_gc_queue(u); |
23a177ef | 1703 | |
c4555ad8 | 1704 | return log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
87f0e418 LP |
1705 | } |
1706 | ||
f9f88198 YW |
1707 | _printf_(7, 8) |
1708 | static int log_unit_internal(void *userdata, int level, int error, const char *file, int line, const char *func, const char *format, ...) { | |
1709 | Unit *u = userdata; | |
1710 | va_list ap; | |
1711 | int r; | |
49365733 | 1712 | |
c2503e35 RH |
1713 | if (u && !unit_log_level_test(u, level)) |
1714 | return -ERRNO_VALUE(error); | |
1715 | ||
f9f88198 YW |
1716 | va_start(ap, format); |
1717 | if (u) | |
1718 | r = log_object_internalv(level, error, file, line, func, | |
1719 | u->manager->unit_log_field, | |
1720 | u->id, | |
1721 | u->manager->invocation_log_field, | |
1722 | u->invocation_id_string, | |
1723 | format, ap); | |
1724 | else | |
1725 | r = log_internalv(level, error, file, line, func, format, ap); | |
1726 | va_end(ap); | |
49365733 | 1727 | |
f9f88198 | 1728 | return r; |
49365733 LP |
1729 | } |
1730 | ||
97a3f4ee | 1731 | static bool unit_test_condition(Unit *u) { |
a0b191b7 LP |
1732 | _cleanup_strv_free_ char **env = NULL; |
1733 | int r; | |
1734 | ||
90bbc946 LP |
1735 | assert(u); |
1736 | ||
ac155bb8 | 1737 | dual_timestamp_get(&u->condition_timestamp); |
90bbc946 | 1738 | |
a0b191b7 LP |
1739 | r = manager_get_effective_environment(u->manager, &env); |
1740 | if (r < 0) { | |
1741 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
d52cc0a5 | 1742 | u->condition_result = true; |
a0b191b7 LP |
1743 | } else |
1744 | u->condition_result = condition_test_list( | |
1745 | u->conditions, | |
1746 | env, | |
1747 | condition_type_to_string, | |
1748 | log_unit_internal, | |
1749 | u); | |
e18f8852 | 1750 | |
a0b191b7 | 1751 | unit_add_to_dbus_queue(u); |
ac155bb8 | 1752 | return u->condition_result; |
90bbc946 LP |
1753 | } |
1754 | ||
97a3f4ee | 1755 | static bool unit_test_assert(Unit *u) { |
a0b191b7 LP |
1756 | _cleanup_strv_free_ char **env = NULL; |
1757 | int r; | |
1758 | ||
59fccdc5 LP |
1759 | assert(u); |
1760 | ||
1761 | dual_timestamp_get(&u->assert_timestamp); | |
59fccdc5 | 1762 | |
a0b191b7 LP |
1763 | r = manager_get_effective_environment(u->manager, &env); |
1764 | if (r < 0) { | |
1765 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
1766 | u->assert_result = CONDITION_ERROR; | |
1767 | } else | |
1768 | u->assert_result = condition_test_list( | |
1769 | u->asserts, | |
1770 | env, | |
1771 | assert_type_to_string, | |
1772 | log_unit_internal, | |
1773 | u); | |
e18f8852 | 1774 | |
a0b191b7 | 1775 | unit_add_to_dbus_queue(u); |
59fccdc5 LP |
1776 | return u->assert_result; |
1777 | } | |
1778 | ||
04d232d8 ZJS |
1779 | void unit_status_printf(Unit *u, StatusType status_type, const char *status, const char *format, const char *ident) { |
1780 | if (log_get_show_color()) { | |
1781 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED && strchr(ident, ' ')) | |
1782 | ident = strjoina(ANSI_HIGHLIGHT, u->id, ANSI_NORMAL, " - ", u->description); | |
1783 | else | |
1784 | ident = strjoina(ANSI_HIGHLIGHT, ident, ANSI_NORMAL); | |
1785 | } | |
5b262f74 | 1786 | |
df446f96 | 1787 | DISABLE_WARNING_FORMAT_NONLITERAL; |
04d232d8 | 1788 | manager_status_printf(u->manager, status_type, status, format, ident); |
df446f96 LP |
1789 | REENABLE_WARNING; |
1790 | } | |
1791 | ||
97a3f4ee | 1792 | int unit_test_start_limit(Unit *u) { |
429926e9 TR |
1793 | const char *reason; |
1794 | ||
6bf0f408 LP |
1795 | assert(u); |
1796 | ||
7bf081a1 | 1797 | if (ratelimit_below(&u->start_ratelimit)) { |
6bf0f408 LP |
1798 | u->start_limit_hit = false; |
1799 | return 0; | |
1800 | } | |
1801 | ||
1802 | log_unit_warning(u, "Start request repeated too quickly."); | |
1803 | u->start_limit_hit = true; | |
1804 | ||
429926e9 TR |
1805 | reason = strjoina("unit ", u->id, " failed"); |
1806 | ||
36c4dc08 LP |
1807 | emergency_action(u->manager, u->start_limit_action, |
1808 | EMERGENCY_ACTION_IS_WATCHDOG|EMERGENCY_ACTION_WARN, | |
1809 | u->reboot_arg, -1, reason); | |
1810 | ||
1811 | return -ECANCELED; | |
6bf0f408 LP |
1812 | } |
1813 | ||
c891efaf | 1814 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1815 | assert(u); |
c891efaf FB |
1816 | |
1817 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1818 | return false; | |
1819 | ||
1820 | /* For some reasons units remaining in the same process group | |
1821 | * as PID 1 fail to acquire the console even if it's not used | |
1822 | * by any process. So skip the confirmation question for them. */ | |
1823 | return !unit_get_exec_context(u)->same_pgrp; | |
1824 | } | |
1825 | ||
631b676b LP |
1826 | static bool unit_verify_deps(Unit *u) { |
1827 | Unit *other; | |
631b676b LP |
1828 | |
1829 | assert(u); | |
1830 | ||
defe63b0 LP |
1831 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined |
1832 | * with After=. We do not check Requires= or Requisite= here as they only should have an effect on | |
1833 | * the job processing, but do not have any effect afterwards. We don't check BindsTo= dependencies | |
1834 | * that are not used in conjunction with After= as for them any such check would make things entirely | |
1835 | * racy. */ | |
631b676b | 1836 | |
15ed3c3a | 1837 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { |
631b676b | 1838 | |
15ed3c3a | 1839 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other)) |
631b676b LP |
1840 | continue; |
1841 | ||
1842 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1843 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1844 | return false; | |
1845 | } | |
1846 | } | |
1847 | ||
1848 | return true; | |
1849 | } | |
1850 | ||
9adb6959 | 1851 | /* Errors that aren't really errors: |
6bf0f408 | 1852 | * -EALREADY: Unit is already started. |
9adb6959 | 1853 | * -ECOMM: Condition failed |
6bf0f408 | 1854 | * -EAGAIN: An operation is already in progress. Retry later. |
9adb6959 LP |
1855 | * |
1856 | * Errors that are real errors: | |
1857 | * -EBADR: This unit type does not support starting. | |
2de9b979 | 1858 | * -ECANCELED: Start limit hit, too many requests for now |
6bf0f408 LP |
1859 | * -EPROTO: Assert failed |
1860 | * -EINVAL: Unit not loaded | |
1861 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1862 | * -ENOLINK: The necessary dependencies are not fulfilled. |
d4fd1cf2 | 1863 | * -ESTALE: This unit has been started before and can't be started a second time |
a4191c9f | 1864 | * -ENOENT: This is a triggering unit and unit to trigger is not loaded |
87f0e418 LP |
1865 | */ |
1866 | int unit_start(Unit *u) { | |
1867 | UnitActiveState state; | |
92ab323c | 1868 | Unit *following; |
5f37c1a9 | 1869 | int r; |
87f0e418 LP |
1870 | |
1871 | assert(u); | |
1872 | ||
b161bc39 MS |
1873 | /* Let's hold off running start jobs for mount units when /proc/self/mountinfo monitor is rate limited. */ |
1874 | if (u->type == UNIT_MOUNT && sd_event_source_is_ratelimited(u->manager->mount_event_source)) | |
1875 | return -EAGAIN; | |
1876 | ||
5766aca8 LP |
1877 | /* If this is already started, then this will succeed. Note that this will even succeed if this unit |
1878 | * is not startable by the user. This is relied on to detect when we need to wait for units and when | |
1879 | * waiting is finished. */ | |
87f0e418 LP |
1880 | state = unit_active_state(u); |
1881 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1882 | return -EALREADY; | |
380dc8b0 LP |
1883 | if (state == UNIT_MAINTENANCE) |
1884 | return -EAGAIN; | |
87f0e418 | 1885 | |
6bf0f408 LP |
1886 | /* Units that aren't loaded cannot be started */ |
1887 | if (u->load_state != UNIT_LOADED) | |
1888 | return -EINVAL; | |
1889 | ||
d4fd1cf2 LP |
1890 | /* Refuse starting scope units more than once */ |
1891 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1892 | return -ESTALE; | |
1893 | ||
5766aca8 LP |
1894 | /* If the conditions failed, don't do anything at all. If we already are activating this call might |
1895 | * still be useful to speed up activation in case there is some hold-off time, but we don't want to | |
1896 | * recheck the condition in that case. */ | |
a82e5507 | 1897 | if (state != UNIT_ACTIVATING && |
5af6aa58 | 1898 | !unit_test_condition(u)) |
5766aca8 | 1899 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(ECOMM), "Starting requested but condition failed. Not starting unit."); |
52661efd | 1900 | |
59fccdc5 LP |
1901 | /* If the asserts failed, fail the entire job */ |
1902 | if (state != UNIT_ACTIVATING && | |
5766aca8 LP |
1903 | !unit_test_assert(u)) |
1904 | return log_unit_notice_errno(u, SYNTHETIC_ERRNO(EPROTO), "Starting requested but asserts failed."); | |
59fccdc5 | 1905 | |
5766aca8 LP |
1906 | /* Units of types that aren't supported cannot be started. Note that we do this test only after the |
1907 | * condition checks, so that we rather return condition check errors (which are usually not | |
1908 | * considered a true failure) than "not supported" errors (which are considered a failure). | |
d11a7645 | 1909 | */ |
96cf3ec9 | 1910 | if (!unit_type_supported(u->type)) |
d11a7645 LP |
1911 | return -EOPNOTSUPP; |
1912 | ||
5766aca8 LP |
1913 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine |
1914 | * should have taken care of this already, but let's check this here again. After all, our | |
1915 | * dependencies might not be in effect anymore, due to a reload or due to a failed condition. */ | |
631b676b LP |
1916 | if (!unit_verify_deps(u)) |
1917 | return -ENOLINK; | |
1918 | ||
92ab323c | 1919 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1920 | following = unit_following(u); |
1921 | if (following) { | |
f2341e0a | 1922 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1923 | return unit_start(following); |
1924 | } | |
1925 | ||
705578c3 MS |
1926 | /* Check our ability to start early so that failure conditions don't cause us to enter a busy loop. */ |
1927 | if (UNIT_VTABLE(u)->can_start) { | |
1928 | r = UNIT_VTABLE(u)->can_start(u); | |
ce2146f5 DDM |
1929 | if (r < 0) |
1930 | return r; | |
1931 | } | |
1932 | ||
92ab323c LP |
1933 | /* If it is stopped, but we cannot start it, then fail */ |
1934 | if (!UNIT_VTABLE(u)->start) | |
1935 | return -EBADR; | |
1936 | ||
5766aca8 LP |
1937 | /* We don't suppress calls to ->start() here when we are already starting, to allow this request to |
1938 | * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it | |
1939 | * waits for a holdoff timer to elapse before it will start again. */ | |
87f0e418 | 1940 | |
c1e1601e | 1941 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 1942 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 1943 | |
d1a34ae9 | 1944 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1945 | } |
1946 | ||
1947 | bool unit_can_start(Unit *u) { | |
1948 | assert(u); | |
1949 | ||
8ff4d2ab LP |
1950 | if (u->load_state != UNIT_LOADED) |
1951 | return false; | |
1952 | ||
96cf3ec9 | 1953 | if (!unit_type_supported(u->type)) |
8ff4d2ab LP |
1954 | return false; |
1955 | ||
d4fd1cf2 LP |
1956 | /* Scope units may be started only once */ |
1957 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
1958 | return false; | |
1959 | ||
87f0e418 LP |
1960 | return !!UNIT_VTABLE(u)->start; |
1961 | } | |
1962 | ||
2528a7a6 LP |
1963 | bool unit_can_isolate(Unit *u) { |
1964 | assert(u); | |
1965 | ||
1966 | return unit_can_start(u) && | |
ac155bb8 | 1967 | u->allow_isolate; |
2528a7a6 LP |
1968 | } |
1969 | ||
87f0e418 LP |
1970 | /* Errors: |
1971 | * -EBADR: This unit type does not support stopping. | |
1972 | * -EALREADY: Unit is already stopped. | |
1973 | * -EAGAIN: An operation is already in progress. Retry later. | |
1974 | */ | |
1975 | int unit_stop(Unit *u) { | |
1976 | UnitActiveState state; | |
92ab323c | 1977 | Unit *following; |
87f0e418 LP |
1978 | |
1979 | assert(u); | |
1980 | ||
87f0e418 | 1981 | state = unit_active_state(u); |
fdf20a31 | 1982 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1983 | return -EALREADY; |
1984 | ||
0faacd47 LP |
1985 | following = unit_following(u); |
1986 | if (following) { | |
f2341e0a | 1987 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1988 | return unit_stop(following); |
1989 | } | |
1990 | ||
7898b0cf LP |
1991 | if (!UNIT_VTABLE(u)->stop) |
1992 | return -EBADR; | |
1993 | ||
c1e1601e | 1994 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 1995 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 1996 | |
d1a34ae9 | 1997 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1998 | } |
1999 | ||
f5869324 LP |
2000 | bool unit_can_stop(Unit *u) { |
2001 | assert(u); | |
2002 | ||
39c79477 ZJS |
2003 | /* Note: if we return true here, it does not mean that the unit may be successfully stopped. |
2004 | * Extrinsic units follow external state and they may stop following external state changes | |
2005 | * (hence we return true here), but an attempt to do this through the manager will fail. */ | |
2006 | ||
96cf3ec9 | 2007 | if (!unit_type_supported(u->type)) |
f5869324 LP |
2008 | return false; |
2009 | ||
2010 | if (u->perpetual) | |
2011 | return false; | |
2012 | ||
2013 | return !!UNIT_VTABLE(u)->stop; | |
2014 | } | |
2015 | ||
87f0e418 LP |
2016 | /* Errors: |
2017 | * -EBADR: This unit type does not support reloading. | |
2018 | * -ENOEXEC: Unit is not started. | |
2019 | * -EAGAIN: An operation is already in progress. Retry later. | |
2020 | */ | |
2021 | int unit_reload(Unit *u) { | |
2022 | UnitActiveState state; | |
92ab323c | 2023 | Unit *following; |
87f0e418 LP |
2024 | |
2025 | assert(u); | |
2026 | ||
ac155bb8 | 2027 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
2028 | return -EINVAL; |
2029 | ||
87f0e418 LP |
2030 | if (!unit_can_reload(u)) |
2031 | return -EBADR; | |
2032 | ||
2033 | state = unit_active_state(u); | |
e364ad06 | 2034 | if (state == UNIT_RELOADING) |
6255af75 | 2035 | return -EAGAIN; |
87f0e418 | 2036 | |
d85ff944 YW |
2037 | if (state != UNIT_ACTIVE) |
2038 | return log_unit_warning_errno(u, SYNTHETIC_ERRNO(ENOEXEC), "Unit cannot be reloaded because it is inactive."); | |
87f0e418 | 2039 | |
e48614c4 ZJS |
2040 | following = unit_following(u); |
2041 | if (following) { | |
f2341e0a | 2042 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
2043 | return unit_reload(following); |
2044 | } | |
2045 | ||
c1e1601e | 2046 | unit_add_to_dbus_queue(u); |
82a2b6bb | 2047 | |
f54bcca5 JR |
2048 | if (!UNIT_VTABLE(u)->reload) { |
2049 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
2ad2e41a | 2050 | unit_notify(u, unit_active_state(u), unit_active_state(u), 0); |
f54bcca5 JR |
2051 | return 0; |
2052 | } | |
2053 | ||
d9e45bc3 MS |
2054 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
2055 | ||
d1a34ae9 | 2056 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
2057 | } |
2058 | ||
2059 | bool unit_can_reload(Unit *u) { | |
2060 | assert(u); | |
2061 | ||
f54bcca5 JR |
2062 | if (UNIT_VTABLE(u)->can_reload) |
2063 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 2064 | |
15ed3c3a | 2065 | if (unit_has_dependency(u, UNIT_ATOM_PROPAGATES_RELOAD_TO, NULL)) |
87f0e418 LP |
2066 | return true; |
2067 | ||
f54bcca5 | 2068 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
2069 | } |
2070 | ||
a3c1168a | 2071 | bool unit_is_unneeded(Unit *u) { |
15ed3c3a | 2072 | Unit *other; |
f3bff0eb LP |
2073 | assert(u); |
2074 | ||
ac155bb8 | 2075 | if (!u->stop_when_unneeded) |
a3c1168a | 2076 | return false; |
f3bff0eb | 2077 | |
a3c1168a | 2078 | /* Don't clean up while the unit is transitioning or is even inactive. */ |
116654d2 | 2079 | if (unit_active_state(u) != UNIT_ACTIVE) |
a3c1168a LP |
2080 | return false; |
2081 | if (u->job) | |
2082 | return false; | |
f3bff0eb | 2083 | |
15ed3c3a | 2084 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_PINS_STOP_WHEN_UNNEEDED) { |
fda09318 | 2085 | /* If a dependent unit has a job queued, is active or transitioning, or is marked for |
a3c1168a | 2086 | * restart, then don't clean this one up. */ |
b81884e7 | 2087 | |
15ed3c3a LP |
2088 | if (other->job) |
2089 | return false; | |
a3c1168a | 2090 | |
15ed3c3a LP |
2091 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
2092 | return false; | |
a3c1168a | 2093 | |
15ed3c3a LP |
2094 | if (unit_will_restart(other)) |
2095 | return false; | |
bea355da LP |
2096 | } |
2097 | ||
a3c1168a LP |
2098 | return true; |
2099 | } | |
f3bff0eb | 2100 | |
0bc488c9 LP |
2101 | bool unit_is_upheld_by_active(Unit *u, Unit **ret_culprit) { |
2102 | Unit *other; | |
2103 | ||
2104 | assert(u); | |
2105 | ||
2106 | /* Checks if the unit needs to be started because it currently is not running, but some other unit | |
2107 | * that is active declared an Uphold= dependencies on it */ | |
2108 | ||
2109 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) || u->job) { | |
2110 | if (ret_culprit) | |
2111 | *ret_culprit = NULL; | |
2112 | return false; | |
2113 | } | |
2114 | ||
2115 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_START_STEADILY) { | |
2116 | if (other->job) | |
2117 | continue; | |
2118 | ||
2119 | if (UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
2120 | if (ret_culprit) | |
2121 | *ret_culprit = other; | |
2122 | return true; | |
2123 | } | |
2124 | } | |
2125 | ||
2126 | if (ret_culprit) | |
2127 | *ret_culprit = NULL; | |
2128 | return false; | |
2129 | } | |
2130 | ||
56c59592 LP |
2131 | bool unit_is_bound_by_inactive(Unit *u, Unit **ret_culprit) { |
2132 | Unit *other; | |
2133 | ||
2134 | assert(u); | |
2135 | ||
2136 | /* Checks whether this unit is bound to another unit that is inactive, i.e. whether we should stop | |
7802194a | 2137 | * because the other unit is down. */ |
56c59592 LP |
2138 | |
2139 | if (unit_active_state(u) != UNIT_ACTIVE || u->job) { | |
2140 | /* Don't clean up while the unit is transitioning or is even inactive. */ | |
2141 | if (ret_culprit) | |
2142 | *ret_culprit = NULL; | |
2143 | return false; | |
2144 | } | |
2145 | ||
2146 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { | |
2147 | if (other->job) | |
2148 | continue; | |
2149 | ||
2150 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) { | |
3da36106 | 2151 | if (ret_culprit) |
56c59592 LP |
2152 | *ret_culprit = other; |
2153 | ||
2154 | return true; | |
2155 | } | |
2156 | } | |
2157 | ||
2158 | if (ret_culprit) | |
2159 | *ret_culprit = NULL; | |
2160 | return false; | |
2161 | } | |
2162 | ||
a3c1168a | 2163 | static void check_unneeded_dependencies(Unit *u) { |
15ed3c3a | 2164 | Unit *other; |
a3c1168a LP |
2165 | assert(u); |
2166 | ||
2167 | /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */ | |
2168 | ||
15ed3c3a LP |
2169 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_STOP_WHEN_UNNEEDED_QUEUE) |
2170 | unit_submit_to_stop_when_unneeded_queue(other); | |
f3bff0eb LP |
2171 | } |
2172 | ||
0bc488c9 LP |
2173 | static void check_uphold_dependencies(Unit *u) { |
2174 | Unit *other; | |
2175 | assert(u); | |
2176 | ||
2177 | /* Add all units this unit depends on to the queue that processes Uphold= behaviour. */ | |
2178 | ||
2179 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_START_WHEN_UPHELD_QUEUE) | |
2180 | unit_submit_to_start_when_upheld_queue(other); | |
2181 | } | |
2182 | ||
56c59592 | 2183 | static void check_bound_by_dependencies(Unit *u) { |
ff502445 | 2184 | Unit *other; |
ff502445 LP |
2185 | assert(u); |
2186 | ||
56c59592 | 2187 | /* Add all units this unit depends on to the queue that processes BindsTo= stop behaviour. */ |
ff502445 | 2188 | |
56c59592 LP |
2189 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_CANNOT_BE_ACTIVE_WITHOUT_QUEUE) |
2190 | unit_submit_to_stop_when_bound_queue(other); | |
ff502445 LP |
2191 | } |
2192 | ||
87f0e418 | 2193 | static void retroactively_start_dependencies(Unit *u) { |
87f0e418 LP |
2194 | Unit *other; |
2195 | ||
2196 | assert(u); | |
2197 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2198 | ||
15ed3c3a LP |
2199 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_REPLACE) /* Requires= + BindsTo= */ |
2200 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
b81884e7 | 2201 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2202 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
b81884e7 | 2203 | |
15ed3c3a LP |
2204 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_FAIL) /* Wants= */ |
2205 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
b81884e7 | 2206 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2207 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL, NULL); |
87f0e418 | 2208 | |
15ed3c3a | 2209 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_START) /* Conflicts= (and inverse) */ |
b81884e7 | 2210 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2211 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
87f0e418 LP |
2212 | } |
2213 | ||
2214 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 LP |
2215 | Unit *other; |
2216 | ||
2217 | assert(u); | |
2218 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2219 | ||
b81884e7 | 2220 | /* Pull down units which are bound to us recursively if enabled */ |
15ed3c3a | 2221 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_STOP) /* BoundBy= */ |
b81884e7 | 2222 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2223 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
cd0504d0 MS |
2224 | } |
2225 | ||
294446dc LP |
2226 | void unit_start_on_failure( |
2227 | Unit *u, | |
2228 | const char *dependency_name, | |
2229 | UnitDependencyAtom atom, | |
2230 | JobMode job_mode) { | |
2231 | ||
82acee14 | 2232 | int n_jobs = -1; |
c0daa706 | 2233 | Unit *other; |
7f66b026 | 2234 | int r; |
c0daa706 LP |
2235 | |
2236 | assert(u); | |
294446dc LP |
2237 | assert(dependency_name); |
2238 | assert(IN_SET(atom, UNIT_ATOM_ON_SUCCESS, UNIT_ATOM_ON_FAILURE)); | |
2239 | ||
2240 | /* Act on OnFailure= and OnSuccess= dependencies */ | |
c0daa706 | 2241 | |
294446dc | 2242 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { |
7f66b026 | 2243 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
222ae6a8 | 2244 | |
82acee14 | 2245 | if (n_jobs < 0) { |
294446dc | 2246 | log_unit_info(u, "Triggering %s dependencies.", dependency_name); |
82acee14 | 2247 | n_jobs = 0; |
15ed3c3a LP |
2248 | } |
2249 | ||
95c81c55 | 2250 | r = manager_add_job(u->manager, JOB_START, other, job_mode, NULL, &error, NULL); |
c1b6628d | 2251 | if (r < 0) |
294446dc LP |
2252 | log_unit_warning_errno( |
2253 | u, r, "Failed to enqueue %s job, ignoring: %s", | |
2254 | dependency_name, bus_error_message(&error, r)); | |
82acee14 | 2255 | n_jobs ++; |
222ae6a8 | 2256 | } |
294446dc | 2257 | |
82acee14 ZJS |
2258 | if (n_jobs >= 0) |
2259 | log_unit_debug(u, "Triggering %s dependencies done (%u %s).", | |
2260 | dependency_name, n_jobs, n_jobs == 1 ? "job" : "jobs"); | |
c0daa706 LP |
2261 | } |
2262 | ||
3ecaa09b LP |
2263 | void unit_trigger_notify(Unit *u) { |
2264 | Unit *other; | |
3ecaa09b LP |
2265 | |
2266 | assert(u); | |
2267 | ||
15ed3c3a | 2268 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_TRIGGERED_BY) |
3ecaa09b LP |
2269 | if (UNIT_VTABLE(other)->trigger_notify) |
2270 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2271 | } | |
2272 | ||
37109b85 ZJS |
2273 | static int raise_level(int log_level, bool condition_info, bool condition_notice) { |
2274 | if (condition_notice && log_level > LOG_NOTICE) | |
2275 | return LOG_NOTICE; | |
2276 | if (condition_info && log_level > LOG_INFO) | |
2277 | return LOG_INFO; | |
2278 | return log_level; | |
2279 | } | |
2280 | ||
915b1d01 | 2281 | static int unit_log_resources(Unit *u) { |
bc40a20e LP |
2282 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + _CGROUP_IO_ACCOUNTING_METRIC_MAX + 4]; |
2283 | bool any_traffic = false, have_ip_accounting = false, any_io = false, have_io_accounting = false; | |
2284 | _cleanup_free_ char *igress = NULL, *egress = NULL, *rr = NULL, *wr = NULL; | |
162392b7 | 2285 | int log_level = LOG_DEBUG; /* May be raised if resources consumed over a threshold */ |
915b1d01 | 2286 | size_t n_message_parts = 0, n_iovec = 0; |
bc40a20e | 2287 | char* message_parts[1 + 2 + 2 + 1], *t; |
915b1d01 | 2288 | nsec_t nsec = NSEC_INFINITY; |
915b1d01 LP |
2289 | int r; |
2290 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2291 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2292 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2293 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2294 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2295 | }; | |
bc40a20e LP |
2296 | const char* const io_fields[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
2297 | [CGROUP_IO_READ_BYTES] = "IO_METRIC_READ_BYTES", | |
2298 | [CGROUP_IO_WRITE_BYTES] = "IO_METRIC_WRITE_BYTES", | |
2299 | [CGROUP_IO_READ_OPERATIONS] = "IO_METRIC_READ_OPERATIONS", | |
2300 | [CGROUP_IO_WRITE_OPERATIONS] = "IO_METRIC_WRITE_OPERATIONS", | |
2301 | }; | |
915b1d01 LP |
2302 | |
2303 | assert(u); | |
2304 | ||
2305 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2306 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2307 | * information and the complete data in structured fields. */ | |
2308 | ||
2309 | (void) unit_get_cpu_usage(u, &nsec); | |
2310 | if (nsec != NSEC_INFINITY) { | |
915b1d01 LP |
2311 | /* Format the CPU time for inclusion in the structured log message */ |
2312 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2313 | r = log_oom(); | |
2314 | goto finish; | |
2315 | } | |
2316 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2317 | ||
2318 | /* Format the CPU time for inclusion in the human language message string */ | |
5291f26d | 2319 | t = strjoin("consumed ", FORMAT_TIMESPAN(nsec / NSEC_PER_USEC, USEC_PER_MSEC), " CPU time"); |
915b1d01 LP |
2320 | if (!t) { |
2321 | r = log_oom(); | |
2322 | goto finish; | |
2323 | } | |
2324 | ||
2325 | message_parts[n_message_parts++] = t; | |
37109b85 ZJS |
2326 | |
2327 | log_level = raise_level(log_level, | |
ef6bb4dd CG |
2328 | nsec > MENTIONWORTHY_CPU_NSEC, |
2329 | nsec > NOTICEWORTHY_CPU_NSEC); | |
915b1d01 LP |
2330 | } |
2331 | ||
bc40a20e | 2332 | for (CGroupIOAccountingMetric k = 0; k < _CGROUP_IO_ACCOUNTING_METRIC_MAX; k++) { |
bc40a20e LP |
2333 | uint64_t value = UINT64_MAX; |
2334 | ||
2335 | assert(io_fields[k]); | |
2336 | ||
2337 | (void) unit_get_io_accounting(u, k, k > 0, &value); | |
2338 | if (value == UINT64_MAX) | |
2339 | continue; | |
2340 | ||
2341 | have_io_accounting = true; | |
2342 | if (value > 0) | |
2343 | any_io = true; | |
2344 | ||
2345 | /* Format IO accounting data for inclusion in the structured log message */ | |
2346 | if (asprintf(&t, "%s=%" PRIu64, io_fields[k], value) < 0) { | |
2347 | r = log_oom(); | |
2348 | goto finish; | |
2349 | } | |
2350 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2351 | ||
2352 | /* Format the IO accounting data for inclusion in the human language message string, but only | |
2353 | * for the bytes counters (and not for the operations counters) */ | |
2354 | if (k == CGROUP_IO_READ_BYTES) { | |
2355 | assert(!rr); | |
2b59bf51 | 2356 | rr = strjoin("read ", strna(FORMAT_BYTES(value)), " from disk"); |
bc40a20e LP |
2357 | if (!rr) { |
2358 | r = log_oom(); | |
2359 | goto finish; | |
2360 | } | |
2361 | } else if (k == CGROUP_IO_WRITE_BYTES) { | |
2362 | assert(!wr); | |
2b59bf51 | 2363 | wr = strjoin("written ", strna(FORMAT_BYTES(value)), " to disk"); |
bc40a20e LP |
2364 | if (!wr) { |
2365 | r = log_oom(); | |
2366 | goto finish; | |
2367 | } | |
2368 | } | |
37109b85 ZJS |
2369 | |
2370 | if (IN_SET(k, CGROUP_IO_READ_BYTES, CGROUP_IO_WRITE_BYTES)) | |
2371 | log_level = raise_level(log_level, | |
2372 | value > MENTIONWORTHY_IO_BYTES, | |
2373 | value > NOTICEWORTHY_IO_BYTES); | |
bc40a20e LP |
2374 | } |
2375 | ||
2376 | if (have_io_accounting) { | |
2377 | if (any_io) { | |
2378 | if (rr) | |
2379 | message_parts[n_message_parts++] = TAKE_PTR(rr); | |
2380 | if (wr) | |
2381 | message_parts[n_message_parts++] = TAKE_PTR(wr); | |
2382 | ||
2383 | } else { | |
2384 | char *k; | |
2385 | ||
2386 | k = strdup("no IO"); | |
2387 | if (!k) { | |
2388 | r = log_oom(); | |
2389 | goto finish; | |
2390 | } | |
2391 | ||
2392 | message_parts[n_message_parts++] = k; | |
2393 | } | |
2394 | } | |
2395 | ||
12375b95 | 2396 | for (CGroupIPAccountingMetric m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
915b1d01 LP |
2397 | uint64_t value = UINT64_MAX; |
2398 | ||
2399 | assert(ip_fields[m]); | |
2400 | ||
2401 | (void) unit_get_ip_accounting(u, m, &value); | |
2402 | if (value == UINT64_MAX) | |
2403 | continue; | |
82044702 LP |
2404 | |
2405 | have_ip_accounting = true; | |
a87b1faa LP |
2406 | if (value > 0) |
2407 | any_traffic = true; | |
915b1d01 LP |
2408 | |
2409 | /* Format IP accounting data for inclusion in the structured log message */ | |
2410 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2411 | r = log_oom(); | |
2412 | goto finish; | |
2413 | } | |
2414 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2415 | ||
2416 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2417 | * bytes counters (and not for the packets counters) */ | |
a87b1faa LP |
2418 | if (m == CGROUP_IP_INGRESS_BYTES) { |
2419 | assert(!igress); | |
2b59bf51 | 2420 | igress = strjoin("received ", strna(FORMAT_BYTES(value)), " IP traffic"); |
a87b1faa LP |
2421 | if (!igress) { |
2422 | r = log_oom(); | |
2423 | goto finish; | |
2424 | } | |
2425 | } else if (m == CGROUP_IP_EGRESS_BYTES) { | |
2426 | assert(!egress); | |
2b59bf51 | 2427 | egress = strjoin("sent ", strna(FORMAT_BYTES(value)), " IP traffic"); |
a87b1faa LP |
2428 | if (!egress) { |
2429 | r = log_oom(); | |
2430 | goto finish; | |
2431 | } | |
2432 | } | |
37109b85 ZJS |
2433 | |
2434 | if (IN_SET(m, CGROUP_IP_INGRESS_BYTES, CGROUP_IP_EGRESS_BYTES)) | |
2435 | log_level = raise_level(log_level, | |
2436 | value > MENTIONWORTHY_IP_BYTES, | |
2437 | value > NOTICEWORTHY_IP_BYTES); | |
a87b1faa LP |
2438 | } |
2439 | ||
c2503e35 RH |
2440 | /* This check is here because it is the earliest point following all possible log_level assignments. If |
2441 | * log_level is assigned anywhere after this point, move this check. */ | |
2442 | if (!unit_log_level_test(u, log_level)) { | |
2443 | r = 0; | |
2444 | goto finish; | |
2445 | } | |
2446 | ||
82044702 LP |
2447 | if (have_ip_accounting) { |
2448 | if (any_traffic) { | |
2449 | if (igress) | |
2450 | message_parts[n_message_parts++] = TAKE_PTR(igress); | |
2451 | if (egress) | |
2452 | message_parts[n_message_parts++] = TAKE_PTR(egress); | |
a87b1faa | 2453 | |
82044702 LP |
2454 | } else { |
2455 | char *k; | |
915b1d01 | 2456 | |
82044702 LP |
2457 | k = strdup("no IP traffic"); |
2458 | if (!k) { | |
2459 | r = log_oom(); | |
2460 | goto finish; | |
2461 | } | |
2462 | ||
2463 | message_parts[n_message_parts++] = k; | |
2464 | } | |
915b1d01 LP |
2465 | } |
2466 | ||
2467 | /* Is there any accounting data available at all? */ | |
2468 | if (n_iovec == 0) { | |
2469 | r = 0; | |
2470 | goto finish; | |
2471 | } | |
2472 | ||
2473 | if (n_message_parts == 0) | |
a87b1faa | 2474 | t = strjoina("MESSAGE=", u->id, ": Completed."); |
915b1d01 | 2475 | else { |
c2b2df60 | 2476 | _cleanup_free_ char *joined = NULL; |
915b1d01 LP |
2477 | |
2478 | message_parts[n_message_parts] = NULL; | |
2479 | ||
2480 | joined = strv_join(message_parts, ", "); | |
2481 | if (!joined) { | |
2482 | r = log_oom(); | |
2483 | goto finish; | |
2484 | } | |
2485 | ||
ec9d636b | 2486 | joined[0] = ascii_toupper(joined[0]); |
a87b1faa | 2487 | t = strjoina("MESSAGE=", u->id, ": ", joined, "."); |
915b1d01 LP |
2488 | } |
2489 | ||
2490 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2491 | * and hence don't increase n_iovec for them */ | |
2492 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2493 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2494 | ||
2495 | t = strjoina(u->manager->unit_log_field, u->id); | |
2496 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2497 | ||
2498 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2499 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2500 | ||
c2503e35 | 2501 | log_unit_struct_iovec(u, log_level, iovec, n_iovec + 4); |
915b1d01 LP |
2502 | r = 0; |
2503 | ||
2504 | finish: | |
12375b95 | 2505 | for (size_t i = 0; i < n_message_parts; i++) |
915b1d01 LP |
2506 | free(message_parts[i]); |
2507 | ||
12375b95 | 2508 | for (size_t i = 0; i < n_iovec; i++) |
915b1d01 LP |
2509 | free(iovec[i].iov_base); |
2510 | ||
2511 | return r; | |
2512 | ||
2513 | } | |
2514 | ||
adefcf28 LP |
2515 | static void unit_update_on_console(Unit *u) { |
2516 | bool b; | |
2517 | ||
2518 | assert(u); | |
2519 | ||
2520 | b = unit_needs_console(u); | |
2521 | if (u->on_console == b) | |
2522 | return; | |
2523 | ||
2524 | u->on_console = b; | |
2525 | if (b) | |
2526 | manager_ref_console(u->manager); | |
2527 | else | |
2528 | manager_unref_console(u->manager); | |
adefcf28 LP |
2529 | } |
2530 | ||
6eb65e7c LP |
2531 | static void unit_emit_audit_start(Unit *u) { |
2532 | assert(u); | |
2533 | ||
2534 | if (u->type != UNIT_SERVICE) | |
2535 | return; | |
2536 | ||
2537 | /* Write audit record if we have just finished starting up */ | |
2538 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); | |
2539 | u->in_audit = true; | |
2540 | } | |
2541 | ||
2542 | static void unit_emit_audit_stop(Unit *u, UnitActiveState state) { | |
2543 | assert(u); | |
2544 | ||
2545 | if (u->type != UNIT_SERVICE) | |
2546 | return; | |
2547 | ||
2548 | if (u->in_audit) { | |
2549 | /* Write audit record if we have just finished shutting down */ | |
2550 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, state == UNIT_INACTIVE); | |
2551 | u->in_audit = false; | |
2552 | } else { | |
2553 | /* Hmm, if there was no start record written write it now, so that we always have a nice pair */ | |
2554 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, state == UNIT_INACTIVE); | |
2555 | ||
2556 | if (state == UNIT_INACTIVE) | |
2557 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); | |
2558 | } | |
2559 | } | |
2560 | ||
16c74914 LP |
2561 | static bool unit_process_job(Job *j, UnitActiveState ns, UnitNotifyFlags flags) { |
2562 | bool unexpected = false; | |
31cd5f63 | 2563 | JobResult result; |
16c74914 LP |
2564 | |
2565 | assert(j); | |
2566 | ||
2567 | if (j->state == JOB_WAITING) | |
2568 | ||
2569 | /* So we reached a different state for this job. Let's see if we can run it now if it failed previously | |
2570 | * due to EAGAIN. */ | |
2571 | job_add_to_run_queue(j); | |
2572 | ||
2573 | /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and | |
2574 | * hence needs to invalidate jobs. */ | |
2575 | ||
2576 | switch (j->type) { | |
2577 | ||
2578 | case JOB_START: | |
2579 | case JOB_VERIFY_ACTIVE: | |
2580 | ||
2581 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
2582 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2583 | else if (j->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
2584 | unexpected = true; | |
2585 | ||
31cd5f63 AZ |
2586 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
2587 | if (ns == UNIT_FAILED) | |
2588 | result = JOB_FAILED; | |
31cd5f63 AZ |
2589 | else |
2590 | result = JOB_DONE; | |
2591 | ||
2592 | job_finish_and_invalidate(j, result, true, false); | |
2593 | } | |
16c74914 LP |
2594 | } |
2595 | ||
2596 | break; | |
2597 | ||
2598 | case JOB_RELOAD: | |
2599 | case JOB_RELOAD_OR_START: | |
2600 | case JOB_TRY_RELOAD: | |
2601 | ||
2602 | if (j->state == JOB_RUNNING) { | |
2603 | if (ns == UNIT_ACTIVE) | |
2604 | job_finish_and_invalidate(j, (flags & UNIT_NOTIFY_RELOAD_FAILURE) ? JOB_FAILED : JOB_DONE, true, false); | |
2605 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { | |
2606 | unexpected = true; | |
2607 | ||
2608 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2609 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2610 | } | |
2611 | } | |
2612 | ||
2613 | break; | |
2614 | ||
2615 | case JOB_STOP: | |
2616 | case JOB_RESTART: | |
2617 | case JOB_TRY_RESTART: | |
2618 | ||
2619 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2620 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2621 | else if (j->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
2622 | unexpected = true; | |
2623 | job_finish_and_invalidate(j, JOB_FAILED, true, false); | |
2624 | } | |
2625 | ||
2626 | break; | |
2627 | ||
2628 | default: | |
04499a70 | 2629 | assert_not_reached(); |
16c74914 LP |
2630 | } |
2631 | ||
2632 | return unexpected; | |
2633 | } | |
2634 | ||
2ad2e41a | 2635 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, UnitNotifyFlags flags) { |
429926e9 | 2636 | const char *reason; |
8559b3b7 | 2637 | Manager *m; |
a096ed36 | 2638 | |
87f0e418 LP |
2639 | assert(u); |
2640 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2641 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2642 | |
8559b3b7 LP |
2643 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2644 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2645 | * remounted this function will be called too! */ | |
87f0e418 | 2646 | |
546ac4f0 MS |
2647 | m = u->manager; |
2648 | ||
3c4832ad LP |
2649 | /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in |
2650 | * the bus queue, so that any job change signal queued will force out the unit change signal first. */ | |
2651 | unit_add_to_dbus_queue(u); | |
2652 | ||
e30bbc90 AZ |
2653 | /* Update systemd-oomd on the property/state change */ |
2654 | if (os != ns) { | |
2655 | /* Always send an update if the unit is going into an inactive state so systemd-oomd knows to stop | |
2656 | * monitoring. | |
2657 | * Also send an update whenever the unit goes active; this is to handle a case where an override file | |
2658 | * sets one of the ManagedOOM*= properties to "kill", then later removes it. systemd-oomd needs to | |
2659 | * know to stop monitoring when the unit changes from "kill" -> "auto" on daemon-reload, but we don't | |
2660 | * have the information on the property. Thus, indiscriminately send an update. */ | |
f561e8c6 | 2661 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) || UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
e30bbc90 AZ |
2662 | (void) manager_varlink_send_managed_oom_update(u); |
2663 | } | |
2664 | ||
f755e3b7 | 2665 | /* Update timestamps for state changes */ |
2c289ea8 | 2666 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2667 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2668 | |
bdbf9951 | 2669 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2670 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2671 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2672 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2673 | |
2674 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2675 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2676 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2677 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2678 | } |
87f0e418 | 2679 | |
865cc19a | 2680 | /* Keep track of failed units */ |
8724defe | 2681 | (void) manager_update_failed_units(m, u, ns == UNIT_FAILED); |
f755e3b7 | 2682 | |
d3070fbd LP |
2683 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2684 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
ff68472a ZJS |
2685 | SET_FLAG(u->markers, |
2686 | (1u << UNIT_MARKER_NEEDS_RELOAD)|(1u << UNIT_MARKER_NEEDS_RESTART), | |
2687 | false); | |
efdb0237 | 2688 | unit_prune_cgroup(u); |
d3070fbd | 2689 | unit_unlink_state_files(u); |
ff68472a ZJS |
2690 | } else if (ns != os && ns == UNIT_RELOADING) |
2691 | SET_FLAG(u->markers, 1u << UNIT_MARKER_NEEDS_RELOAD, false); | |
fb385181 | 2692 | |
adefcf28 | 2693 | unit_update_on_console(u); |
7ed9f6cd | 2694 | |
2c289ea8 | 2695 | if (!MANAGER_IS_RELOADING(m)) { |
a1c7334b LP |
2696 | bool unexpected; |
2697 | ||
2698 | /* Let's propagate state changes to the job */ | |
2699 | if (u->job) | |
2700 | unexpected = unit_process_job(u->job, ns, flags); | |
2701 | else | |
2702 | unexpected = true; | |
f3bff0eb | 2703 | |
a1c7334b LP |
2704 | /* If this state change happened without being requested by a job, then let's retroactively start or |
2705 | * stop dependencies. We skip that step when deserializing, since we don't want to create any | |
2706 | * additional jobs just because something is already activated. */ | |
bdbf9951 LP |
2707 | |
2708 | if (unexpected) { | |
2709 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2710 | retroactively_start_dependencies(u); | |
2711 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2712 | retroactively_stop_dependencies(u); | |
2713 | } | |
5de9682c | 2714 | |
bdbf9951 | 2715 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2716 | log_unit_debug(u, "Unit entered failed state."); |
2ad2e41a LP |
2717 | |
2718 | if (!(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
294446dc | 2719 | unit_start_on_failure(u, "OnFailure=", UNIT_ATOM_ON_FAILURE, u->on_failure_job_mode); |
cd6d0a45 | 2720 | } |
e537352b | 2721 | |
256f65d0 LP |
2722 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns) && !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
2723 | /* This unit just finished starting up */ | |
3b2775c5 | 2724 | |
6eb65e7c | 2725 | unit_emit_audit_start(u); |
546ac4f0 | 2726 | manager_send_unit_plymouth(m, u); |
256f65d0 | 2727 | } |
bdbf9951 | 2728 | |
256f65d0 | 2729 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && !UNIT_IS_INACTIVE_OR_FAILED(os)) { |
915b1d01 | 2730 | /* This unit just stopped/failed. */ |
256f65d0 | 2731 | |
6eb65e7c | 2732 | unit_emit_audit_stop(u, ns); |
915b1d01 | 2733 | unit_log_resources(u); |
cd6d0a45 | 2734 | } |
294446dc LP |
2735 | |
2736 | if (ns == UNIT_INACTIVE && !IN_SET(os, UNIT_FAILED, UNIT_INACTIVE, UNIT_MAINTENANCE) && | |
2737 | !(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
2738 | unit_start_on_failure(u, "OnSuccess=", UNIT_ATOM_ON_SUCCESS, u->on_success_job_mode); | |
f278026d LP |
2739 | } |
2740 | ||
31dc1ca3 LP |
2741 | manager_recheck_journal(m); |
2742 | manager_recheck_dbus(m); | |
e63ebf71 | 2743 | |
3ecaa09b | 2744 | unit_trigger_notify(u); |
3b2775c5 | 2745 | |
8724defe | 2746 | if (!MANAGER_IS_RELOADING(m)) { |
429926e9 TR |
2747 | if (os != UNIT_FAILED && ns == UNIT_FAILED) { |
2748 | reason = strjoina("unit ", u->id, " failed"); | |
36c4dc08 | 2749 | emergency_action(m, u->failure_action, 0, u->reboot_arg, unit_failure_action_exit_status(u), reason); |
429926e9 TR |
2750 | } else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) { |
2751 | reason = strjoina("unit ", u->id, " succeeded"); | |
36c4dc08 | 2752 | emergency_action(m, u->success_action, 0, u->reboot_arg, unit_success_action_exit_status(u), reason); |
429926e9 | 2753 | } |
ff502445 LP |
2754 | } |
2755 | ||
99e9af25 | 2756 | /* And now, add the unit or depending units to various queues that will act on the new situation if |
48008c1c | 2757 | * needed. These queues generally check for continuous state changes rather than events (like most of |
99e9af25 LP |
2758 | * the state propagation above), and do work deferred instead of instantly, since they typically |
2759 | * don't want to run during reloading, and usually involve checking combined state of multiple units | |
2760 | * at once. */ | |
2761 | ||
2762 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
2763 | /* Stop unneeded units and bound-by units regardless if going down was expected or not */ | |
2764 | check_unneeded_dependencies(u); | |
2765 | check_bound_by_dependencies(u); | |
2766 | ||
2767 | /* Maybe someone wants us to remain up? */ | |
2768 | unit_submit_to_start_when_upheld_queue(u); | |
2769 | ||
2770 | /* Maybe the unit should be GC'ed now? */ | |
2771 | unit_add_to_gc_queue(u); | |
2772 | } | |
2773 | ||
2774 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
2775 | /* Start uphold units regardless if going up was expected or not */ | |
2776 | check_uphold_dependencies(u); | |
2777 | ||
2778 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ | |
2779 | unit_submit_to_stop_when_unneeded_queue(u); | |
2780 | ||
2781 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens | |
2782 | * when something BindsTo= to a Type=oneshot unit, as these units go directly from starting to | |
2783 | * inactive, without ever entering started.) */ | |
2784 | unit_submit_to_stop_when_bound_queue(u); | |
2785 | } | |
87f0e418 LP |
2786 | } |
2787 | ||
f75f613d | 2788 | int unit_watch_pid(Unit *u, pid_t pid, bool exclusive) { |
62a76913 | 2789 | int r; |
a911bb9a | 2790 | |
87f0e418 | 2791 | assert(u); |
62a76913 | 2792 | assert(pid_is_valid(pid)); |
87f0e418 | 2793 | |
62a76913 | 2794 | /* Watch a specific PID */ |
5ba6985b | 2795 | |
f75f613d FB |
2796 | /* Caller might be sure that this PID belongs to this unit only. Let's take this |
2797 | * opportunity to remove any stalled references to this PID as they can be created | |
2798 | * easily (when watching a process which is not our direct child). */ | |
2799 | if (exclusive) | |
2800 | manager_unwatch_pid(u->manager, pid); | |
2801 | ||
d5099efc | 2802 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2803 | if (r < 0) |
2804 | return r; | |
2805 | ||
62a76913 | 2806 | r = hashmap_ensure_allocated(&u->manager->watch_pids, NULL); |
a911bb9a LP |
2807 | if (r < 0) |
2808 | return r; | |
2809 | ||
62a76913 LP |
2810 | /* First try, let's add the unit keyed by "pid". */ |
2811 | r = hashmap_put(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2812 | if (r == -EEXIST) { | |
2813 | Unit **array; | |
2814 | bool found = false; | |
2815 | size_t n = 0; | |
05e343b7 | 2816 | |
62a76913 LP |
2817 | /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points |
2818 | * to an array of Units rather than just a Unit), lists us already. */ | |
a911bb9a | 2819 | |
62a76913 LP |
2820 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); |
2821 | if (array) | |
2822 | for (; array[n]; n++) | |
2823 | if (array[n] == u) | |
2824 | found = true; | |
a911bb9a | 2825 | |
62a76913 LP |
2826 | if (found) /* Found it already? if so, do nothing */ |
2827 | r = 0; | |
2828 | else { | |
2829 | Unit **new_array; | |
2830 | ||
2831 | /* Allocate a new array */ | |
2832 | new_array = new(Unit*, n + 2); | |
2833 | if (!new_array) | |
2834 | return -ENOMEM; | |
2835 | ||
2836 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2837 | new_array[n] = u; | |
2838 | new_array[n+1] = NULL; | |
2839 | ||
2840 | /* Add or replace the old array */ | |
2841 | r = hashmap_replace(u->manager->watch_pids, PID_TO_PTR(-pid), new_array); | |
2842 | if (r < 0) { | |
2843 | free(new_array); | |
2844 | return r; | |
2845 | } | |
2846 | ||
2847 | free(array); | |
2848 | } | |
2849 | } else if (r < 0) | |
2850 | return r; | |
2851 | ||
2852 | r = set_put(u->pids, PID_TO_PTR(pid)); | |
2853 | if (r < 0) | |
2854 | return r; | |
2855 | ||
2856 | return 0; | |
87f0e418 LP |
2857 | } |
2858 | ||
2859 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
62a76913 LP |
2860 | Unit **array; |
2861 | ||
87f0e418 | 2862 | assert(u); |
62a76913 LP |
2863 | assert(pid_is_valid(pid)); |
2864 | ||
2865 | /* First let's drop the unit in case it's keyed as "pid". */ | |
2866 | (void) hashmap_remove_value(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2867 | ||
2868 | /* Then, let's also drop the unit, in case it's in the array keyed by -pid */ | |
2869 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); | |
2870 | if (array) { | |
62a76913 | 2871 | /* Let's iterate through the array, dropping our own entry */ |
12375b95 ZJS |
2872 | |
2873 | size_t m = 0; | |
2874 | for (size_t n = 0; array[n]; n++) | |
62a76913 LP |
2875 | if (array[n] != u) |
2876 | array[m++] = array[n]; | |
2877 | array[m] = NULL; | |
2878 | ||
2879 | if (m == 0) { | |
2880 | /* The array is now empty, remove the entire entry */ | |
20c3acfa | 2881 | assert_se(hashmap_remove(u->manager->watch_pids, PID_TO_PTR(-pid)) == array); |
62a76913 LP |
2882 | free(array); |
2883 | } | |
2884 | } | |
87f0e418 | 2885 | |
fea72cc0 | 2886 | (void) set_remove(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2887 | } |
2888 | ||
bd44e61b LP |
2889 | void unit_unwatch_all_pids(Unit *u) { |
2890 | assert(u); | |
2891 | ||
2892 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2893 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2894 | |
efdb0237 | 2895 | u->pids = set_free(u->pids); |
a911bb9a LP |
2896 | } |
2897 | ||
50be4f4a LP |
2898 | static void unit_tidy_watch_pids(Unit *u) { |
2899 | pid_t except1, except2; | |
a911bb9a LP |
2900 | void *e; |
2901 | ||
2902 | assert(u); | |
2903 | ||
2904 | /* Cleans dead PIDs from our list */ | |
2905 | ||
50be4f4a LP |
2906 | except1 = unit_main_pid(u); |
2907 | except2 = unit_control_pid(u); | |
2908 | ||
90e74a66 | 2909 | SET_FOREACH(e, u->pids) { |
fea72cc0 | 2910 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2911 | |
2912 | if (pid == except1 || pid == except2) | |
2913 | continue; | |
2914 | ||
9f5650ae | 2915 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2916 | unit_unwatch_pid(u, pid); |
a911bb9a | 2917 | } |
87f0e418 LP |
2918 | } |
2919 | ||
50be4f4a LP |
2920 | static int on_rewatch_pids_event(sd_event_source *s, void *userdata) { |
2921 | Unit *u = userdata; | |
2922 | ||
2923 | assert(s); | |
2924 | assert(u); | |
2925 | ||
2926 | unit_tidy_watch_pids(u); | |
2927 | unit_watch_all_pids(u); | |
2928 | ||
2929 | /* If the PID set is empty now, then let's finish this off. */ | |
2930 | unit_synthesize_cgroup_empty_event(u); | |
2931 | ||
2932 | return 0; | |
2933 | } | |
2934 | ||
2935 | int unit_enqueue_rewatch_pids(Unit *u) { | |
2936 | int r; | |
2937 | ||
2938 | assert(u); | |
2939 | ||
2940 | if (!u->cgroup_path) | |
2941 | return -ENOENT; | |
2942 | ||
2943 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
2944 | if (r < 0) | |
2945 | return r; | |
2946 | if (r > 0) /* On unified we can use proper notifications */ | |
2947 | return 0; | |
2948 | ||
2949 | /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new | |
2950 | * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it | |
2951 | * involves issuing kill(pid, 0) on all processes we watch. */ | |
2952 | ||
2953 | if (!u->rewatch_pids_event_source) { | |
2954 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
2955 | ||
2956 | r = sd_event_add_defer(u->manager->event, &s, on_rewatch_pids_event, u); | |
2957 | if (r < 0) | |
2958 | return log_error_errno(r, "Failed to allocate event source for tidying watched PIDs: %m"); | |
2959 | ||
2960 | r = sd_event_source_set_priority(s, SD_EVENT_PRIORITY_IDLE); | |
2961 | if (r < 0) | |
28b77ab2 | 2962 | return log_error_errno(r, "Failed to adjust priority of event source for tidying watched PIDs: %m"); |
50be4f4a LP |
2963 | |
2964 | (void) sd_event_source_set_description(s, "tidy-watch-pids"); | |
2965 | ||
2966 | u->rewatch_pids_event_source = TAKE_PTR(s); | |
2967 | } | |
2968 | ||
2969 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_ONESHOT); | |
2970 | if (r < 0) | |
2971 | return log_error_errno(r, "Failed to enable event source for tidying watched PIDs: %m"); | |
2972 | ||
2973 | return 0; | |
2974 | } | |
2975 | ||
2976 | void unit_dequeue_rewatch_pids(Unit *u) { | |
2977 | int r; | |
2978 | assert(u); | |
2979 | ||
2980 | if (!u->rewatch_pids_event_source) | |
2981 | return; | |
2982 | ||
2983 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_OFF); | |
2984 | if (r < 0) | |
2985 | log_warning_errno(r, "Failed to disable event source for tidying watched PIDs, ignoring: %m"); | |
2986 | ||
5dcadb4c | 2987 | u->rewatch_pids_event_source = sd_event_source_disable_unref(u->rewatch_pids_event_source); |
50be4f4a LP |
2988 | } |
2989 | ||
87f0e418 LP |
2990 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2991 | assert(u); | |
2992 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2993 | ||
2994 | switch (j) { | |
2995 | ||
2996 | case JOB_VERIFY_ACTIVE: | |
2997 | case JOB_START: | |
e0209d83 | 2998 | case JOB_NOP: |
f5869324 | 2999 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
86b52a39 | 3000 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueuing |
f5869324 | 3001 | * jobs for it. */ |
87f0e418 LP |
3002 | return true; |
3003 | ||
f5869324 LP |
3004 | case JOB_STOP: |
3005 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
86b52a39 | 3006 | * external events), hence it makes no sense to permit enqueuing such a request either. */ |
f5869324 LP |
3007 | return !u->perpetual; |
3008 | ||
87f0e418 LP |
3009 | case JOB_RESTART: |
3010 | case JOB_TRY_RESTART: | |
f5869324 | 3011 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
3012 | |
3013 | case JOB_RELOAD: | |
3282591d | 3014 | case JOB_TRY_RELOAD: |
87f0e418 LP |
3015 | return unit_can_reload(u); |
3016 | ||
3017 | case JOB_RELOAD_OR_START: | |
3018 | return unit_can_reload(u) && unit_can_start(u); | |
3019 | ||
3020 | default: | |
04499a70 | 3021 | assert_not_reached(); |
87f0e418 LP |
3022 | } |
3023 | } | |
3024 | ||
eef85c4a LP |
3025 | int unit_add_dependency( |
3026 | Unit *u, | |
3027 | UnitDependency d, | |
3028 | Unit *other, | |
3029 | bool add_reference, | |
3030 | UnitDependencyMask mask) { | |
87f0e418 LP |
3031 | |
3032 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
fb138166 ZJS |
3033 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, |
3034 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, | |
3035 | [UNIT_WANTS] = UNIT_WANTED_BY, | |
3036 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, | |
3037 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, | |
3038 | [UNIT_UPHOLDS] = UNIT_UPHELD_BY, | |
3039 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, | |
3040 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, | |
3041 | [UNIT_WANTED_BY] = UNIT_WANTS, | |
3042 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, | |
3043 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, | |
3044 | [UNIT_UPHELD_BY] = UNIT_UPHOLDS, | |
3045 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, | |
3046 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
3047 | [UNIT_BEFORE] = UNIT_AFTER, | |
3048 | [UNIT_AFTER] = UNIT_BEFORE, | |
3049 | [UNIT_ON_SUCCESS] = UNIT_ON_SUCCESS_OF, | |
3050 | [UNIT_ON_SUCCESS_OF] = UNIT_ON_SUCCESS, | |
3051 | [UNIT_ON_FAILURE] = UNIT_ON_FAILURE_OF, | |
3052 | [UNIT_ON_FAILURE_OF] = UNIT_ON_FAILURE, | |
3053 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
3054 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, | |
3055 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, | |
85e9a101 | 3056 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
fb138166 ZJS |
3057 | [UNIT_PROPAGATES_STOP_TO] = UNIT_STOP_PROPAGATED_FROM, |
3058 | [UNIT_STOP_PROPAGATED_FROM] = UNIT_PROPAGATES_STOP_TO, | |
3059 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, /* symmetric! 👓 */ | |
3060 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, | |
3061 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, | |
3062 | [UNIT_IN_SLICE] = UNIT_SLICE_OF, | |
3063 | [UNIT_SLICE_OF] = UNIT_IN_SLICE, | |
87f0e418 | 3064 | }; |
eef85c4a | 3065 | Unit *original_u = u, *original_other = other; |
15ed3c3a | 3066 | UnitDependencyAtom a; |
eef85c4a | 3067 | int r; |
15ed3c3a LP |
3068 | |
3069 | /* Helper to know whether sending a notification is necessary or not: if the dependency is already | |
3070 | * there, no need to notify! */ | |
ac17080c | 3071 | bool notify, notify_other = false; |
87f0e418 LP |
3072 | |
3073 | assert(u); | |
3074 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
3075 | assert(other); |
3076 | ||
9f151f29 LP |
3077 | u = unit_follow_merge(u); |
3078 | other = unit_follow_merge(other); | |
15ed3c3a LP |
3079 | a = unit_dependency_to_atom(d); |
3080 | assert(a >= 0); | |
9f151f29 | 3081 | |
15ed3c3a | 3082 | /* We won't allow dependencies on ourselves. We will not consider them an error however. */ |
d1fab3fe | 3083 | if (u == other) { |
15ed3c3a | 3084 | unit_maybe_warn_about_dependency(original_u, original_other->id, d); |
87f0e418 | 3085 | return 0; |
d1fab3fe | 3086 | } |
87f0e418 | 3087 | |
f14d6810 MG |
3088 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3089 | return 0; | |
3090 | ||
15ed3c3a LP |
3091 | /* Note that ordering a device unit after a unit is permitted since it allows to start its job |
3092 | * running timeout at a specific time. */ | |
3093 | if (FLAGS_SET(a, UNIT_ATOM_BEFORE) && other->type == UNIT_DEVICE) { | |
b862c257 | 3094 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
c80a9a33 LP |
3095 | return 0; |
3096 | } | |
3097 | ||
15ed3c3a | 3098 | if (FLAGS_SET(a, UNIT_ATOM_ON_FAILURE) && !UNIT_VTABLE(u)->can_fail) { |
c80a9a33 LP |
3099 | log_unit_warning(u, "Requested dependency OnFailure=%s ignored (%s units cannot fail).", other->id, unit_type_to_string(u->type)); |
3100 | return 0; | |
3101 | } | |
3102 | ||
15ed3c3a | 3103 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERS) && !UNIT_VTABLE(u)->can_trigger) |
c80a9a33 LP |
3104 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3105 | "Requested dependency Triggers=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(u->type)); | |
15ed3c3a | 3106 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERED_BY) && !UNIT_VTABLE(other)->can_trigger) |
c80a9a33 LP |
3107 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3108 | "Requested dependency TriggeredBy=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(other->type)); | |
3109 | ||
d219a2b0 LP |
3110 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && other->type != UNIT_SLICE) |
3111 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3112 | "Requested dependency Slice=%s refused (%s is not a slice unit).", other->id, other->id); | |
3113 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && u->type != UNIT_SLICE) | |
3114 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3115 | "Requested dependency SliceOf=%s refused (%s is not a slice unit).", other->id, u->id); | |
3116 | ||
3117 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && !UNIT_HAS_CGROUP_CONTEXT(u)) | |
3118 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3119 | "Requested dependency Slice=%s refused (%s is not a cgroup unit).", other->id, u->id); | |
3120 | ||
3121 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && !UNIT_HAS_CGROUP_CONTEXT(other)) | |
3122 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3123 | "Requested dependency SliceOf=%s refused (%s is not a cgroup unit).", other->id, other->id); | |
3124 | ||
15ed3c3a | 3125 | r = unit_add_dependency_hashmap(&u->dependencies, d, other, mask, 0); |
613b411c | 3126 | if (r < 0) |
87f0e418 | 3127 | return r; |
ac17080c | 3128 | notify = r > 0; |
87f0e418 | 3129 | |
eef85c4a | 3130 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
15ed3c3a | 3131 | r = unit_add_dependency_hashmap(&other->dependencies, inverse_table[d], u, 0, mask); |
613b411c LP |
3132 | if (r < 0) |
3133 | return r; | |
ac17080c | 3134 | notify_other = r > 0; |
613b411c LP |
3135 | } |
3136 | ||
3137 | if (add_reference) { | |
15ed3c3a | 3138 | r = unit_add_dependency_hashmap(&u->dependencies, UNIT_REFERENCES, other, mask, 0); |
613b411c | 3139 | if (r < 0) |
5de9682c | 3140 | return r; |
ac17080c | 3141 | notify = notify || r > 0; |
5de9682c | 3142 | |
15ed3c3a | 3143 | r = unit_add_dependency_hashmap(&other->dependencies, UNIT_REFERENCED_BY, u, 0, mask); |
613b411c | 3144 | if (r < 0) |
701cc384 | 3145 | return r; |
ac17080c | 3146 | notify_other = notify_other || r > 0; |
613b411c | 3147 | } |
87f0e418 | 3148 | |
ac17080c | 3149 | if (notify) |
5177cb0a | 3150 | unit_add_to_dbus_queue(u); |
ac17080c YW |
3151 | if (notify_other) |
3152 | unit_add_to_dbus_queue(other); | |
15ed3c3a | 3153 | |
ac17080c | 3154 | return notify || notify_other; |
87f0e418 | 3155 | } |
0301abf4 | 3156 | |
eef85c4a | 3157 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
a8c5a4c6 | 3158 | int r, s; |
2c966c03 LP |
3159 | |
3160 | assert(u); | |
3161 | ||
eef85c4a | 3162 | r = unit_add_dependency(u, d, other, add_reference, mask); |
3f3cc397 | 3163 | if (r < 0) |
2c966c03 LP |
3164 | return r; |
3165 | ||
a8c5a4c6 YW |
3166 | s = unit_add_dependency(u, e, other, add_reference, mask); |
3167 | if (s < 0) | |
3168 | return s; | |
3169 | ||
3170 | return r > 0 || s > 0; | |
2c966c03 LP |
3171 | } |
3172 | ||
23e8c796 | 3173 | static int resolve_template(Unit *u, const char *name, char **buf, const char **ret) { |
7410616c | 3174 | int r; |
9e2f7c11 LP |
3175 | |
3176 | assert(u); | |
23e8c796 | 3177 | assert(name); |
7410616c LP |
3178 | assert(buf); |
3179 | assert(ret); | |
9e2f7c11 | 3180 | |
7410616c LP |
3181 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
3182 | *buf = NULL; | |
3183 | *ret = name; | |
3184 | return 0; | |
9e2f7c11 LP |
3185 | } |
3186 | ||
ac155bb8 | 3187 | if (u->instance) |
7410616c | 3188 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 3189 | else { |
ae018d9b | 3190 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 3191 | |
7410616c LP |
3192 | r = unit_name_to_prefix(u->id, &i); |
3193 | if (r < 0) | |
3194 | return r; | |
9e2f7c11 | 3195 | |
7410616c | 3196 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 3197 | } |
7410616c LP |
3198 | if (r < 0) |
3199 | return r; | |
9e2f7c11 | 3200 | |
7410616c LP |
3201 | *ret = *buf; |
3202 | return 0; | |
9e2f7c11 LP |
3203 | } |
3204 | ||
35d8c19a | 3205 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3206 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
3207 | Unit *other; |
3208 | int r; | |
3209 | ||
9e2f7c11 | 3210 | assert(u); |
35d8c19a | 3211 | assert(name); |
09b6b09f | 3212 | |
23e8c796 | 3213 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3214 | if (r < 0) |
3215 | return r; | |
09b6b09f | 3216 | |
f14d6810 MG |
3217 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3218 | return 0; | |
3219 | ||
35d8c19a | 3220 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
8afbb8e1 LP |
3221 | if (r < 0) |
3222 | return r; | |
9e2f7c11 | 3223 | |
eef85c4a | 3224 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
3225 | } |
3226 | ||
5a724170 | 3227 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3228 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
3229 | Unit *other; |
3230 | int r; | |
2c966c03 LP |
3231 | |
3232 | assert(u); | |
5a724170 | 3233 | assert(name); |
2c966c03 | 3234 | |
23e8c796 | 3235 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3236 | if (r < 0) |
3237 | return r; | |
2c966c03 | 3238 | |
f14d6810 MG |
3239 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3240 | return 0; | |
3241 | ||
5a724170 | 3242 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
3f3cc397 | 3243 | if (r < 0) |
68eda4bd | 3244 | return r; |
2c966c03 | 3245 | |
eef85c4a | 3246 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
3247 | } |
3248 | ||
0301abf4 | 3249 | int set_unit_path(const char *p) { |
0301abf4 | 3250 | /* This is mostly for debug purposes */ |
7c248223 | 3251 | return RET_NERRNO(setenv("SYSTEMD_UNIT_PATH", p, 1)); |
0301abf4 | 3252 | } |
88066b3a | 3253 | |
ea430986 | 3254 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
3255 | assert(u); |
3256 | ||
ac155bb8 | 3257 | if (!u->id) |
04ade7d2 LP |
3258 | return NULL; |
3259 | ||
48899192 | 3260 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
3261 | } |
3262 | ||
4b58153d LP |
3263 | char *unit_dbus_path_invocation_id(Unit *u) { |
3264 | assert(u); | |
3265 | ||
3266 | if (sd_id128_is_null(u->invocation_id)) | |
3267 | return NULL; | |
3268 | ||
3269 | return unit_dbus_path_from_name(u->invocation_id_string); | |
3270 | } | |
3271 | ||
2d3b784d | 3272 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { |
db868d45 ZJS |
3273 | int r; |
3274 | ||
3275 | assert(u); | |
3276 | ||
3277 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
3278 | ||
3279 | if (sd_id128_equal(u->invocation_id, id)) | |
3280 | return 0; | |
3281 | ||
3282 | if (!sd_id128_is_null(u->invocation_id)) | |
3283 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3284 | ||
3285 | if (sd_id128_is_null(id)) { | |
3286 | r = 0; | |
3287 | goto reset; | |
3288 | } | |
3289 | ||
3290 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
3291 | if (r < 0) | |
3292 | goto reset; | |
3293 | ||
3294 | u->invocation_id = id; | |
3295 | sd_id128_to_string(id, u->invocation_id_string); | |
3296 | ||
3297 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3298 | if (r < 0) | |
3299 | goto reset; | |
3300 | ||
3301 | return 0; | |
3302 | ||
3303 | reset: | |
3304 | u->invocation_id = SD_ID128_NULL; | |
3305 | u->invocation_id_string[0] = 0; | |
3306 | return r; | |
3307 | } | |
3308 | ||
899acf5c | 3309 | int unit_set_slice(Unit *u, Unit *slice) { |
d219a2b0 LP |
3310 | int r; |
3311 | ||
d79200e2 LP |
3312 | assert(u); |
3313 | assert(slice); | |
3314 | ||
d219a2b0 LP |
3315 | /* Sets the unit slice if it has not been set before. Is extra careful, to only allow this for units |
3316 | * that actually have a cgroup context. Also, we don't allow to set this for slices (since the parent | |
3317 | * slice is derived from the name). Make sure the unit we set is actually a slice. */ | |
d79200e2 LP |
3318 | |
3319 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3320 | return -EOPNOTSUPP; | |
3321 | ||
3322 | if (u->type == UNIT_SLICE) | |
3323 | return -EINVAL; | |
3324 | ||
102ef982 LP |
3325 | if (unit_active_state(u) != UNIT_INACTIVE) |
3326 | return -EBUSY; | |
3327 | ||
d79200e2 LP |
3328 | if (slice->type != UNIT_SLICE) |
3329 | return -EINVAL; | |
3330 | ||
efdb0237 LP |
3331 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
3332 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
3333 | return -EPERM; | |
3334 | ||
12f64221 | 3335 | if (UNIT_GET_SLICE(u) == slice) |
d79200e2 LP |
3336 | return 0; |
3337 | ||
99e66921 | 3338 | /* Disallow slice changes if @u is already bound to cgroups */ |
12f64221 | 3339 | if (UNIT_GET_SLICE(u) && u->cgroup_realized) |
d79200e2 LP |
3340 | return -EBUSY; |
3341 | ||
899acf5c AZ |
3342 | /* Remove any slices assigned prior; we should only have one UNIT_IN_SLICE dependency */ |
3343 | if (UNIT_GET_SLICE(u)) | |
3344 | unit_remove_dependencies(u, UNIT_DEPENDENCY_SLICE_PROPERTY); | |
3345 | ||
3346 | r = unit_add_dependency(u, UNIT_IN_SLICE, slice, true, UNIT_DEPENDENCY_SLICE_PROPERTY); | |
d219a2b0 LP |
3347 | if (r < 0) |
3348 | return r; | |
3349 | ||
d79200e2 LP |
3350 | return 1; |
3351 | } | |
3352 | ||
3353 | int unit_set_default_slice(Unit *u) { | |
a8833944 | 3354 | const char *slice_name; |
a016b922 LP |
3355 | Unit *slice; |
3356 | int r; | |
3357 | ||
3358 | assert(u); | |
3359 | ||
f14d6810 MG |
3360 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3361 | return 0; | |
3362 | ||
12f64221 | 3363 | if (UNIT_GET_SLICE(u)) |
a016b922 LP |
3364 | return 0; |
3365 | ||
a8833944 LP |
3366 | if (u->instance) { |
3367 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 3368 | |
a8833944 LP |
3369 | /* Implicitly place all instantiated units in their |
3370 | * own per-template slice */ | |
3371 | ||
7410616c LP |
3372 | r = unit_name_to_prefix(u->id, &prefix); |
3373 | if (r < 0) | |
3374 | return r; | |
a8833944 LP |
3375 | |
3376 | /* The prefix is already escaped, but it might include | |
3377 | * "-" which has a special meaning for slice units, | |
3378 | * hence escape it here extra. */ | |
7410616c | 3379 | escaped = unit_name_escape(prefix); |
a8833944 LP |
3380 | if (!escaped) |
3381 | return -ENOMEM; | |
3382 | ||
463d0d15 | 3383 | if (MANAGER_IS_SYSTEM(u->manager)) |
00e7b3c8 | 3384 | slice_name = strjoina("system-", escaped, ".slice"); |
a8833944 | 3385 | else |
7f3b86a4 | 3386 | slice_name = strjoina("app-", escaped, ".slice"); |
5ee24fa0 ZJS |
3387 | |
3388 | } else if (unit_is_extrinsic(u)) | |
3389 | /* Keep all extrinsic units (e.g. perpetual units and swap and mount units in user mode) in | |
3390 | * the root slice. They don't really belong in one of the subslices. */ | |
3391 | slice_name = SPECIAL_ROOT_SLICE; | |
3392 | ||
3393 | else if (MANAGER_IS_SYSTEM(u->manager)) | |
3394 | slice_name = SPECIAL_SYSTEM_SLICE; | |
3395 | else | |
3396 | slice_name = SPECIAL_APP_SLICE; | |
a8833944 LP |
3397 | |
3398 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
3399 | if (r < 0) |
3400 | return r; | |
3401 | ||
899acf5c | 3402 | return unit_set_slice(u, slice); |
a016b922 LP |
3403 | } |
3404 | ||
9444b1f2 | 3405 | const char *unit_slice_name(Unit *u) { |
12f64221 | 3406 | Unit *slice; |
9444b1f2 LP |
3407 | assert(u); |
3408 | ||
12f64221 LP |
3409 | slice = UNIT_GET_SLICE(u); |
3410 | if (!slice) | |
9444b1f2 LP |
3411 | return NULL; |
3412 | ||
12f64221 | 3413 | return slice->id; |
9444b1f2 LP |
3414 | } |
3415 | ||
f6ff8c29 | 3416 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 3417 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
3418 | int r; |
3419 | ||
3420 | assert(u); | |
3421 | assert(type); | |
3422 | assert(_found); | |
3423 | ||
7410616c LP |
3424 | r = unit_name_change_suffix(u->id, type, &t); |
3425 | if (r < 0) | |
3426 | return r; | |
3427 | if (unit_has_name(u, t)) | |
3428 | return -EINVAL; | |
f6ff8c29 | 3429 | |
ac155bb8 | 3430 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3431 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3432 | return r; |
3433 | } | |
3434 | ||
bbc29086 | 3435 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
fc67a943 | 3436 | const char *new_owner; |
bbc29086 DM |
3437 | Unit *u = userdata; |
3438 | int r; | |
3439 | ||
3440 | assert(message); | |
3441 | assert(u); | |
3442 | ||
fc67a943 | 3443 | r = sd_bus_message_read(message, "sss", NULL, NULL, &new_owner); |
bbc29086 DM |
3444 | if (r < 0) { |
3445 | bus_log_parse_error(r); | |
3446 | return 0; | |
3447 | } | |
3448 | ||
3449 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3450 | UNIT_VTABLE(u)->bus_name_owner_change(u, empty_to_null(new_owner)); |
a5a8776a MJ |
3451 | |
3452 | return 0; | |
3453 | } | |
3454 | ||
3455 | static int get_name_owner_handler(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
3456 | const sd_bus_error *e; | |
3457 | const char *new_owner; | |
3458 | Unit *u = userdata; | |
3459 | int r; | |
3460 | ||
3461 | assert(message); | |
3462 | assert(u); | |
3463 | ||
3464 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); | |
3465 | ||
a5a8776a | 3466 | e = sd_bus_message_get_error(message); |
a5a8776a | 3467 | if (e) { |
33322185 YW |
3468 | if (!sd_bus_error_has_name(e, "org.freedesktop.DBus.Error.NameHasNoOwner")) { |
3469 | r = sd_bus_error_get_errno(e); | |
3470 | log_unit_error_errno(u, r, | |
3471 | "Unexpected error response from GetNameOwner(): %s", | |
3472 | bus_error_message(e, r)); | |
3473 | } | |
a5a8776a | 3474 | |
fc67a943 LP |
3475 | new_owner = NULL; |
3476 | } else { | |
3477 | r = sd_bus_message_read(message, "s", &new_owner); | |
3478 | if (r < 0) | |
3479 | return bus_log_parse_error(r); | |
a5a8776a | 3480 | |
fc67a943 LP |
3481 | assert(!isempty(new_owner)); |
3482 | } | |
a5a8776a MJ |
3483 | |
3484 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3485 | UNIT_VTABLE(u)->bus_name_owner_change(u, new_owner); |
bbc29086 DM |
3486 | |
3487 | return 0; | |
3488 | } | |
3489 | ||
9806e87d LP |
3490 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3491 | const char *match; | |
a5b07847 | 3492 | int r; |
bbc29086 | 3493 | |
9806e87d LP |
3494 | assert(u); |
3495 | assert(bus); | |
3496 | assert(name); | |
bbc29086 | 3497 | |
a5b07847 | 3498 | if (u->match_bus_slot || u->get_name_owner_slot) |
bbc29086 DM |
3499 | return -EBUSY; |
3500 | ||
9806e87d | 3501 | match = strjoina("type='signal'," |
81d62103 ZJS |
3502 | "sender='org.freedesktop.DBus'," |
3503 | "path='/org/freedesktop/DBus'," | |
3504 | "interface='org.freedesktop.DBus'," | |
3505 | "member='NameOwnerChanged'," | |
3506 | "arg0='", name, "'"); | |
bbc29086 | 3507 | |
a5b07847 | 3508 | r = sd_bus_add_match_async(bus, &u->match_bus_slot, match, signal_name_owner_changed, NULL, u); |
a5a8776a MJ |
3509 | if (r < 0) |
3510 | return r; | |
3511 | ||
a5b07847 LP |
3512 | r = sd_bus_call_method_async( |
3513 | bus, | |
3514 | &u->get_name_owner_slot, | |
3515 | "org.freedesktop.DBus", | |
3516 | "/org/freedesktop/DBus", | |
3517 | "org.freedesktop.DBus", | |
3518 | "GetNameOwner", | |
3519 | get_name_owner_handler, | |
3520 | u, | |
3521 | "s", name); | |
3522 | if (r < 0) { | |
3523 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3524 | return r; | |
3525 | } | |
3526 | ||
3527 | log_unit_debug(u, "Watching D-Bus name '%s'.", name); | |
3528 | return 0; | |
bbc29086 DM |
3529 | } |
3530 | ||
05e343b7 | 3531 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3532 | int r; |
3533 | ||
05e343b7 LP |
3534 | assert(u); |
3535 | assert(name); | |
3536 | ||
3537 | /* Watch a specific name on the bus. We only support one unit | |
3538 | * watching each name for now. */ | |
3539 | ||
bbc29086 DM |
3540 | if (u->manager->api_bus) { |
3541 | /* If the bus is already available, install the match directly. | |
3542 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3543 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3544 | if (r < 0) |
8ea823b6 | 3545 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3546 | } |
3547 | ||
3548 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3549 | if (r < 0) { | |
3550 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
a5b07847 | 3551 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
bbc29086 DM |
3552 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); |
3553 | } | |
3554 | ||
3555 | return 0; | |
05e343b7 LP |
3556 | } |
3557 | ||
3558 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3559 | assert(u); | |
3560 | assert(name); | |
3561 | ||
8367fea5 | 3562 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3563 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
a5a8776a | 3564 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
05e343b7 LP |
3565 | } |
3566 | ||
d336ba9f | 3567 | int unit_add_node_dependency(Unit *u, const char *what, UnitDependency dep, UnitDependencyMask mask) { |
68eda4bd | 3568 | _cleanup_free_ char *e = NULL; |
44b0d1fd | 3569 | Unit *device; |
6e2ef85b LP |
3570 | int r; |
3571 | ||
3572 | assert(u); | |
3573 | ||
6e2ef85b | 3574 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3575 | if (isempty(what)) |
3576 | return 0; | |
6e2ef85b | 3577 | |
8407a5d0 | 3578 | if (!is_device_path(what)) |
6e2ef85b LP |
3579 | return 0; |
3580 | ||
44b0d1fd | 3581 | /* When device units aren't supported (such as in a container), don't create dependencies on them. */ |
1c2e9646 | 3582 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3583 | return 0; |
3584 | ||
7410616c LP |
3585 | r = unit_name_from_path(what, ".device", &e); |
3586 | if (r < 0) | |
3587 | return r; | |
6e2ef85b | 3588 | |
ac155bb8 | 3589 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3590 | if (r < 0) |
3591 | return r; | |
3592 | ||
ebc8968b FB |
3593 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3594 | dep = UNIT_BINDS_TO; | |
3595 | ||
d336ba9f FB |
3596 | return unit_add_two_dependencies(u, UNIT_AFTER, |
3597 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, | |
3598 | device, true, mask); | |
6e2ef85b | 3599 | } |
a16e1123 | 3600 | |
44b0d1fd LP |
3601 | int unit_add_blockdev_dependency(Unit *u, const char *what, UnitDependencyMask mask) { |
3602 | _cleanup_free_ char *escaped = NULL, *target = NULL; | |
3603 | int r; | |
3604 | ||
3605 | assert(u); | |
3606 | ||
3607 | if (isempty(what)) | |
3608 | return 0; | |
3609 | ||
3610 | if (!path_startswith(what, "/dev/")) | |
3611 | return 0; | |
3612 | ||
3613 | /* If we don't support devices, then also don't bother with blockdev@.target */ | |
3614 | if (!unit_type_supported(UNIT_DEVICE)) | |
3615 | return 0; | |
3616 | ||
3617 | r = unit_name_path_escape(what, &escaped); | |
3618 | if (r < 0) | |
3619 | return r; | |
3620 | ||
3621 | r = unit_name_build("blockdev", escaped, ".target", &target); | |
3622 | if (r < 0) | |
3623 | return r; | |
3624 | ||
3625 | return unit_add_dependency_by_name(u, UNIT_AFTER, target, true, mask); | |
3626 | } | |
3627 | ||
be847e82 | 3628 | int unit_coldplug(Unit *u) { |
05a98afd | 3629 | int r = 0, q; |
cca098b0 LP |
3630 | |
3631 | assert(u); | |
3632 | ||
f0831ed2 | 3633 | /* Make sure we don't enter a loop, when coldplugging recursively. */ |
f78f265f LP |
3634 | if (u->coldplugged) |
3635 | return 0; | |
3636 | ||
3637 | u->coldplugged = true; | |
3638 | ||
05a98afd LP |
3639 | STRV_FOREACH(i, u->deserialized_refs) { |
3640 | q = bus_unit_track_add_name(u, *i); | |
3641 | if (q < 0 && r >= 0) | |
3642 | r = q; | |
3643 | } | |
3644 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 3645 | |
05a98afd LP |
3646 | if (UNIT_VTABLE(u)->coldplug) { |
3647 | q = UNIT_VTABLE(u)->coldplug(u); | |
3648 | if (q < 0 && r >= 0) | |
3649 | r = q; | |
3650 | } | |
5a6158b6 | 3651 | |
7dbd330c GL |
3652 | if (u->job) { |
3653 | q = job_coldplug(u->job); | |
3654 | if (q < 0 && r >= 0) | |
3655 | r = q; | |
3656 | } | |
3657 | if (u->nop_job) { | |
3658 | q = job_coldplug(u->nop_job); | |
05a98afd LP |
3659 | if (q < 0 && r >= 0) |
3660 | r = q; | |
3661 | } | |
cca098b0 | 3662 | |
05a98afd | 3663 | return r; |
cca098b0 LP |
3664 | } |
3665 | ||
f0831ed2 LP |
3666 | void unit_catchup(Unit *u) { |
3667 | assert(u); | |
3668 | ||
3669 | if (UNIT_VTABLE(u)->catchup) | |
3670 | UNIT_VTABLE(u)->catchup(u); | |
869f52f2 DS |
3671 | |
3672 | unit_cgroup_catchup(u); | |
f0831ed2 LP |
3673 | } |
3674 | ||
ba25d39e | 3675 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3676 | struct stat st; |
3677 | ||
3678 | if (!path) | |
3679 | return false; | |
3680 | ||
77969722 LP |
3681 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3682 | * are never out-of-date. */ | |
3683 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3684 | return false; | |
3685 | ||
21b95806 ZJS |
3686 | if (stat(path, &st) < 0) |
3687 | /* What, cannot access this anymore? */ | |
3688 | return true; | |
3689 | ||
ba25d39e ZJS |
3690 | if (path_masked) |
3691 | /* For masked files check if they are still so */ | |
3692 | return !null_or_empty(&st); | |
3693 | else | |
3a8db9fe | 3694 | /* For non-empty files check the mtime */ |
87ec20ef | 3695 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3696 | |
3697 | return false; | |
3698 | } | |
3699 | ||
45fb0699 | 3700 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 | 3701 | _cleanup_strv_free_ char **t = NULL; |
1b64d026 | 3702 | |
45fb0699 LP |
3703 | assert(u); |
3704 | ||
ba25d39e ZJS |
3705 | /* For unit files, we allow masking… */ |
3706 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3707 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3708 | return true; |
5f4b19f4 | 3709 | |
ba25d39e ZJS |
3710 | /* Source paths should not be masked… */ |
3711 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3712 | return true; |
ae7a7182 | 3713 | |
19a44dfe LR |
3714 | if (u->load_state == UNIT_LOADED) |
3715 | (void) unit_find_dropin_paths(u, &t); | |
ab932a62 LP |
3716 | if (!strv_equal(u->dropin_paths, t)) |
3717 | return true; | |
6d10d308 | 3718 | |
ba25d39e | 3719 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3720 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3721 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3722 | return true; |
21b95806 | 3723 | |
ab932a62 | 3724 | return false; |
45fb0699 LP |
3725 | } |
3726 | ||
fdf20a31 | 3727 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3728 | assert(u); |
3729 | ||
fdf20a31 MM |
3730 | if (UNIT_VTABLE(u)->reset_failed) |
3731 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 | 3732 | |
7bf081a1 | 3733 | ratelimit_reset(&u->start_ratelimit); |
6bf0f408 | 3734 | u->start_limit_hit = false; |
5632e374 LP |
3735 | } |
3736 | ||
a7f241db LP |
3737 | Unit *unit_following(Unit *u) { |
3738 | assert(u); | |
3739 | ||
3740 | if (UNIT_VTABLE(u)->following) | |
3741 | return UNIT_VTABLE(u)->following(u); | |
3742 | ||
3743 | return NULL; | |
3744 | } | |
3745 | ||
31afa0a4 | 3746 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3747 | assert(u); |
3748 | ||
31afa0a4 LP |
3749 | /* This call does check the current state of the unit. It's |
3750 | * hence useful to be called from state change calls of the | |
3751 | * unit itself, where the state isn't updated yet. This is | |
3752 | * different from unit_inactive_or_pending() which checks both | |
3753 | * the current state and for a queued job. */ | |
18ffdfda | 3754 | |
28a2dfe8 | 3755 | return unit_has_job_type(u, JOB_STOP); |
31afa0a4 LP |
3756 | } |
3757 | ||
3758 | bool unit_inactive_or_pending(Unit *u) { | |
3759 | assert(u); | |
3760 | ||
3761 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3762 | |
d956ac29 LP |
3763 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3764 | return true; | |
3765 | ||
31afa0a4 | 3766 | if (unit_stop_pending(u)) |
18ffdfda LP |
3767 | return true; |
3768 | ||
3769 | return false; | |
3770 | } | |
3771 | ||
31afa0a4 | 3772 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3773 | assert(u); |
3774 | ||
f60c2665 | 3775 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3776 | |
3777 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3778 | return true; | |
3779 | ||
ac155bb8 | 3780 | if (u->job && |
3742095b | 3781 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
3782 | return true; |
3783 | ||
3784 | return false; | |
3785 | } | |
3786 | ||
52a12341 YW |
3787 | bool unit_will_restart_default(Unit *u) { |
3788 | assert(u); | |
3789 | ||
28a2dfe8 | 3790 | return unit_has_job_type(u, JOB_START); |
52a12341 YW |
3791 | } |
3792 | ||
deb4e708 MK |
3793 | bool unit_will_restart(Unit *u) { |
3794 | assert(u); | |
3795 | ||
3796 | if (!UNIT_VTABLE(u)->will_restart) | |
3797 | return false; | |
3798 | ||
3799 | return UNIT_VTABLE(u)->will_restart(u); | |
3800 | } | |
3801 | ||
718db961 | 3802 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3803 | assert(u); |
3804 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 3805 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 3806 | |
8a0867d6 | 3807 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3808 | return -EOPNOTSUPP; |
8a0867d6 | 3809 | |
c74f17d9 | 3810 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3811 | } |
3812 | ||
38c41427 NK |
3813 | void unit_notify_cgroup_oom(Unit *u, bool managed_oom) { |
3814 | assert(u); | |
3815 | ||
3816 | if (UNIT_VTABLE(u)->notify_cgroup_oom) | |
3817 | UNIT_VTABLE(u)->notify_cgroup_oom(u, managed_oom); | |
3818 | } | |
3819 | ||
82659fd7 | 3820 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
af4fa99d | 3821 | _cleanup_set_free_ Set *pid_set = NULL; |
82659fd7 LP |
3822 | int r; |
3823 | ||
d5099efc | 3824 | pid_set = set_new(NULL); |
82659fd7 LP |
3825 | if (!pid_set) |
3826 | return NULL; | |
3827 | ||
3828 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3829 | if (main_pid > 0) { | |
fea72cc0 | 3830 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 | 3831 | if (r < 0) |
95f14a3e | 3832 | return NULL; |
82659fd7 LP |
3833 | } |
3834 | ||
3835 | if (control_pid > 0) { | |
fea72cc0 | 3836 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 | 3837 | if (r < 0) |
95f14a3e | 3838 | return NULL; |
82659fd7 LP |
3839 | } |
3840 | ||
95f14a3e | 3841 | return TAKE_PTR(pid_set); |
82659fd7 LP |
3842 | } |
3843 | ||
d9911002 LP |
3844 | static int kill_common_log(pid_t pid, int signo, void *userdata) { |
3845 | _cleanup_free_ char *comm = NULL; | |
3846 | Unit *u = userdata; | |
3847 | ||
3848 | assert(u); | |
3849 | ||
3850 | (void) get_process_comm(pid, &comm); | |
3851 | log_unit_info(u, "Sending signal SIG%s to process " PID_FMT " (%s) on client request.", | |
3852 | signal_to_string(signo), pid, strna(comm)); | |
3853 | ||
3854 | return 1; | |
3855 | } | |
3856 | ||
d91c34f2 LP |
3857 | int unit_kill_common( |
3858 | Unit *u, | |
3859 | KillWho who, | |
3860 | int signo, | |
3861 | pid_t main_pid, | |
3862 | pid_t control_pid, | |
718db961 | 3863 | sd_bus_error *error) { |
d91c34f2 | 3864 | |
814cc562 | 3865 | int r = 0; |
ac5e3a50 | 3866 | bool killed = false; |
814cc562 | 3867 | |
8aff7ac4 LP |
3868 | /* This is the common implementation for explicit user-requested killing of unit processes, shared by |
3869 | * various unit types. Do not confuse with unit_kill_context(), which is what we use when we want to | |
3870 | * stop a service ourselves. */ | |
3871 | ||
ac5e3a50 | 3872 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3873 | if (main_pid < 0) |
7358dc02 | 3874 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
8aff7ac4 | 3875 | if (main_pid == 0) |
7358dc02 | 3876 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3877 | } |
3878 | ||
ac5e3a50 | 3879 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3880 | if (control_pid < 0) |
7358dc02 | 3881 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
8aff7ac4 | 3882 | if (control_pid == 0) |
7358dc02 | 3883 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3884 | } |
3885 | ||
ac5e3a50 JS |
3886 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3887 | if (control_pid > 0) { | |
d9911002 LP |
3888 | _cleanup_free_ char *comm = NULL; |
3889 | (void) get_process_comm(control_pid, &comm); | |
3890 | ||
3891 | if (kill(control_pid, signo) < 0) { | |
3892 | /* Report this failure both to the logs and to the client */ | |
3893 | sd_bus_error_set_errnof( | |
3894 | error, errno, | |
3895 | "Failed to send signal SIG%s to control process " PID_FMT " (%s): %m", | |
3896 | signal_to_string(signo), control_pid, strna(comm)); | |
3897 | r = log_unit_warning_errno( | |
3898 | u, errno, | |
3899 | "Failed to send signal SIG%s to control process " PID_FMT " (%s) on client request: %m", | |
3900 | signal_to_string(signo), control_pid, strna(comm)); | |
3901 | } else { | |
3902 | log_unit_info(u, "Sent signal SIG%s to control process " PID_FMT " (%s) on client request.", | |
3903 | signal_to_string(signo), control_pid, strna(comm)); | |
ac5e3a50 | 3904 | killed = true; |
d9911002 | 3905 | } |
ac5e3a50 | 3906 | } |
814cc562 | 3907 | |
ac5e3a50 JS |
3908 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3909 | if (main_pid > 0) { | |
d9911002 LP |
3910 | _cleanup_free_ char *comm = NULL; |
3911 | (void) get_process_comm(main_pid, &comm); | |
3912 | ||
3913 | if (kill(main_pid, signo) < 0) { | |
3914 | if (r == 0) | |
3915 | sd_bus_error_set_errnof( | |
3916 | error, errno, | |
3917 | "Failed to send signal SIG%s to main process " PID_FMT " (%s): %m", | |
3918 | signal_to_string(signo), main_pid, strna(comm)); | |
3919 | ||
3920 | r = log_unit_warning_errno( | |
3921 | u, errno, | |
3922 | "Failed to send signal SIG%s to main process " PID_FMT " (%s) on client request: %m", | |
3923 | signal_to_string(signo), main_pid, strna(comm)); | |
3924 | } else { | |
3925 | log_unit_info(u, "Sent signal SIG%s to main process " PID_FMT " (%s) on client request.", | |
3926 | signal_to_string(signo), main_pid, strna(comm)); | |
ac5e3a50 | 3927 | killed = true; |
d9911002 | 3928 | } |
ac5e3a50 | 3929 | } |
814cc562 | 3930 | |
ac5e3a50 | 3931 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3932 | _cleanup_set_free_ Set *pid_set = NULL; |
3933 | int q; | |
3934 | ||
82659fd7 LP |
3935 | /* Exclude the main/control pids from being killed via the cgroup */ |
3936 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 | 3937 | if (!pid_set) |
d9911002 LP |
3938 | return log_oom(); |
3939 | ||
3940 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, kill_common_log, u); | |
3941 | if (q < 0) { | |
3942 | if (!IN_SET(q, -ESRCH, -ENOENT)) { | |
3943 | if (r == 0) | |
3944 | sd_bus_error_set_errnof( | |
3945 | error, q, | |
3946 | "Failed to send signal SIG%s to auxiliary processes: %m", | |
3947 | signal_to_string(signo)); | |
3948 | ||
3949 | r = log_unit_warning_errno( | |
3950 | u, q, | |
3951 | "Failed to send signal SIG%s to auxiliary processes on client request: %m", | |
3952 | signal_to_string(signo)); | |
3953 | } | |
3954 | } else | |
ac5e3a50 | 3955 | killed = true; |
814cc562 MS |
3956 | } |
3957 | ||
2ae0508e LP |
3958 | /* If the "fail" versions of the operation are requested, then complain if the set of processes we killed is empty */ |
3959 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL, KILL_MAIN_FAIL)) | |
3960 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No matching processes to kill"); | |
ac5e3a50 | 3961 | |
814cc562 MS |
3962 | return r; |
3963 | } | |
3964 | ||
6210e7fc LP |
3965 | int unit_following_set(Unit *u, Set **s) { |
3966 | assert(u); | |
3967 | assert(s); | |
3968 | ||
3969 | if (UNIT_VTABLE(u)->following_set) | |
3970 | return UNIT_VTABLE(u)->following_set(u, s); | |
3971 | ||
3972 | *s = NULL; | |
3973 | return 0; | |
3974 | } | |
3975 | ||
a4375746 | 3976 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
3977 | int r; |
3978 | ||
a4375746 LP |
3979 | assert(u); |
3980 | ||
0ec0deaa LP |
3981 | if (u->unit_file_state < 0 && u->fragment_path) { |
3982 | r = unit_file_get_state( | |
463d0d15 | 3983 | u->manager->unit_file_scope, |
0ec0deaa | 3984 | NULL, |
9ea3a0e7 | 3985 | u->id, |
0ec0deaa LP |
3986 | &u->unit_file_state); |
3987 | if (r < 0) | |
3988 | u->unit_file_state = UNIT_FILE_BAD; | |
3989 | } | |
a4375746 | 3990 | |
ac155bb8 | 3991 | return u->unit_file_state; |
a4375746 LP |
3992 | } |
3993 | ||
d2dc52db LP |
3994 | int unit_get_unit_file_preset(Unit *u) { |
3995 | assert(u); | |
3996 | ||
3997 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3998 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 3999 | u->manager->unit_file_scope, |
0ec0deaa | 4000 | NULL, |
8f7b2566 ZJS |
4001 | basename(u->fragment_path), |
4002 | NULL); | |
d2dc52db LP |
4003 | |
4004 | return u->unit_file_preset; | |
4005 | } | |
4006 | ||
7f7d01ed | 4007 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 4008 | assert(ref); |
7f7d01ed ZJS |
4009 | assert(source); |
4010 | assert(target); | |
57020a3a | 4011 | |
7f7d01ed | 4012 | if (ref->target) |
57020a3a LP |
4013 | unit_ref_unset(ref); |
4014 | ||
7f7d01ed ZJS |
4015 | ref->source = source; |
4016 | ref->target = target; | |
4017 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
4018 | return target; | |
57020a3a LP |
4019 | } |
4020 | ||
4021 | void unit_ref_unset(UnitRef *ref) { | |
4022 | assert(ref); | |
4023 | ||
7f7d01ed | 4024 | if (!ref->target) |
57020a3a LP |
4025 | return; |
4026 | ||
b75102e5 LP |
4027 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
4028 | * be unreferenced now. */ | |
7f7d01ed | 4029 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 4030 | |
7f7d01ed ZJS |
4031 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
4032 | ref->source = ref->target = NULL; | |
57020a3a LP |
4033 | } |
4034 | ||
29206d46 LP |
4035 | static int user_from_unit_name(Unit *u, char **ret) { |
4036 | ||
4037 | static const uint8_t hash_key[] = { | |
4038 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
4039 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
4040 | }; | |
4041 | ||
4042 | _cleanup_free_ char *n = NULL; | |
4043 | int r; | |
4044 | ||
4045 | r = unit_name_to_prefix(u->id, &n); | |
4046 | if (r < 0) | |
4047 | return r; | |
4048 | ||
7a8867ab | 4049 | if (valid_user_group_name(n, 0)) { |
ae2a15bc | 4050 | *ret = TAKE_PTR(n); |
29206d46 LP |
4051 | return 0; |
4052 | } | |
4053 | ||
4054 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
4055 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
4056 | return -ENOMEM; | |
4057 | ||
4058 | return 0; | |
4059 | } | |
4060 | ||
598459ce LP |
4061 | int unit_patch_contexts(Unit *u) { |
4062 | CGroupContext *cc; | |
4063 | ExecContext *ec; | |
cba6e062 LP |
4064 | int r; |
4065 | ||
e06c73cc | 4066 | assert(u); |
e06c73cc | 4067 | |
598459ce LP |
4068 | /* Patch in the manager defaults into the exec and cgroup |
4069 | * contexts, _after_ the rest of the settings have been | |
4070 | * initialized */ | |
085afe36 | 4071 | |
598459ce LP |
4072 | ec = unit_get_exec_context(u); |
4073 | if (ec) { | |
4074 | /* This only copies in the ones that need memory */ | |
12375b95 | 4075 | for (unsigned i = 0; i < _RLIMIT_MAX; i++) |
598459ce LP |
4076 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { |
4077 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
4078 | if (!ec->rlimit[i]) | |
4079 | return -ENOMEM; | |
4080 | } | |
4081 | ||
463d0d15 | 4082 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4083 | !ec->working_directory) { |
4084 | ||
4085 | r = get_home_dir(&ec->working_directory); | |
4086 | if (r < 0) | |
4087 | return r; | |
4c08c824 LP |
4088 | |
4089 | /* Allow user services to run, even if the | |
4090 | * home directory is missing */ | |
4091 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4092 | } |
4093 | ||
598459ce | 4094 | if (ec->private_devices) |
2cd0a735 | 4095 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4096 | |
4097 | if (ec->protect_kernel_modules) | |
4098 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 | 4099 | |
84703040 KK |
4100 | if (ec->protect_kernel_logs) |
4101 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYSLOG); | |
4102 | ||
fc64760d KK |
4103 | if (ec->protect_clock) |
4104 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_SYS_TIME) | (UINT64_C(1) << CAP_WAKE_ALARM)); | |
4105 | ||
29206d46 LP |
4106 | if (ec->dynamic_user) { |
4107 | if (!ec->user) { | |
4108 | r = user_from_unit_name(u, &ec->user); | |
4109 | if (r < 0) | |
4110 | return r; | |
4111 | } | |
4112 | ||
4113 | if (!ec->group) { | |
4114 | ec->group = strdup(ec->user); | |
4115 | if (!ec->group) | |
4116 | return -ENOMEM; | |
4117 | } | |
4118 | ||
bf65b7e0 LP |
4119 | /* If the dynamic user option is on, let's make sure that the unit can't leave its |
4120 | * UID/GID around in the file system or on IPC objects. Hence enforce a strict | |
4121 | * sandbox. */ | |
63bb64a0 | 4122 | |
29206d46 | 4123 | ec->private_tmp = true; |
00d9ef85 | 4124 | ec->remove_ipc = true; |
63bb64a0 LP |
4125 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4126 | if (ec->protect_home == PROTECT_HOME_NO) | |
4127 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
bf65b7e0 LP |
4128 | |
4129 | /* Make sure this service can neither benefit from SUID/SGID binaries nor create | |
4130 | * them. */ | |
4131 | ec->no_new_privileges = true; | |
4132 | ec->restrict_suid_sgid = true; | |
29206d46 | 4133 | } |
cba6e062 LP |
4134 | } |
4135 | ||
598459ce | 4136 | cc = unit_get_cgroup_context(u); |
fe65e88b | 4137 | if (cc && ec) { |
f513e420 | 4138 | |
fe65e88b | 4139 | if (ec->private_devices && |
084870f9 ZJS |
4140 | cc->device_policy == CGROUP_DEVICE_POLICY_AUTO) |
4141 | cc->device_policy = CGROUP_DEVICE_POLICY_CLOSED; | |
fe65e88b | 4142 | |
64903d18 | 4143 | if ((ec->root_image || ec->mount_images) && |
084870f9 | 4144 | (cc->device_policy != CGROUP_DEVICE_POLICY_AUTO || cc->device_allow)) { |
fe65e88b | 4145 | |
b3d13314 | 4146 | /* When RootImage= or MountImages= is specified, the following devices are touched. */ |
0cffae95 LB |
4147 | FOREACH_STRING(p, "/dev/loop-control", "/dev/mapper/control") { |
4148 | r = cgroup_add_device_allow(cc, p, "rw"); | |
4149 | if (r < 0) | |
4150 | return r; | |
4151 | } | |
4152 | FOREACH_STRING(p, "block-loop", "block-blkext", "block-device-mapper") { | |
4153 | r = cgroup_add_device_allow(cc, p, "rwm"); | |
4154 | if (r < 0) | |
4155 | return r; | |
4156 | } | |
867af728 | 4157 | |
0cffae95 LB |
4158 | /* Make sure "block-loop" can be resolved, i.e. make sure "loop" shows up in /proc/devices. |
4159 | * Same for mapper and verity. */ | |
4160 | FOREACH_STRING(p, "modprobe@loop.service", "modprobe@dm_mod.service", "modprobe@dm_verity.service") { | |
4161 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, p, true, UNIT_DEPENDENCY_FILE); | |
4162 | if (r < 0) | |
4163 | return r; | |
4164 | } | |
fe65e88b | 4165 | } |
fc64760d KK |
4166 | |
4167 | if (ec->protect_clock) { | |
4168 | r = cgroup_add_device_allow(cc, "char-rtc", "r"); | |
4169 | if (r < 0) | |
4170 | return r; | |
4171 | } | |
598459ce | 4172 | } |
f1660f96 | 4173 | |
cba6e062 | 4174 | return 0; |
e06c73cc LP |
4175 | } |
4176 | ||
c2503e35 | 4177 | ExecContext *unit_get_exec_context(const Unit *u) { |
3ef63c31 LP |
4178 | size_t offset; |
4179 | assert(u); | |
4180 | ||
598459ce LP |
4181 | if (u->type < 0) |
4182 | return NULL; | |
4183 | ||
3ef63c31 LP |
4184 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4185 | if (offset <= 0) | |
4186 | return NULL; | |
4187 | ||
4188 | return (ExecContext*) ((uint8_t*) u + offset); | |
4189 | } | |
4190 | ||
718db961 LP |
4191 | KillContext *unit_get_kill_context(Unit *u) { |
4192 | size_t offset; | |
4193 | assert(u); | |
4194 | ||
598459ce LP |
4195 | if (u->type < 0) |
4196 | return NULL; | |
4197 | ||
718db961 LP |
4198 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4199 | if (offset <= 0) | |
4200 | return NULL; | |
4201 | ||
4202 | return (KillContext*) ((uint8_t*) u + offset); | |
4203 | } | |
4204 | ||
4ad49000 LP |
4205 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4206 | size_t offset; | |
4207 | ||
598459ce LP |
4208 | if (u->type < 0) |
4209 | return NULL; | |
4210 | ||
4ad49000 LP |
4211 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4212 | if (offset <= 0) | |
4213 | return NULL; | |
4214 | ||
4215 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4216 | } | |
4217 | ||
613b411c LP |
4218 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4219 | size_t offset; | |
4220 | ||
598459ce LP |
4221 | if (u->type < 0) |
4222 | return NULL; | |
4223 | ||
613b411c LP |
4224 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4225 | if (offset <= 0) | |
4226 | return NULL; | |
4227 | ||
4228 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4229 | } | |
4230 | ||
2e59b241 | 4231 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4232 | assert(u); |
4233 | ||
2e59b241 | 4234 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4235 | return NULL; |
4236 | ||
39591351 LP |
4237 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4238 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4239 | |
2e59b241 | 4240 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4241 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4242 | |
2e59b241 LP |
4243 | if (flags & UNIT_RUNTIME) |
4244 | return u->manager->lookup_paths.runtime_control; | |
4245 | ||
39591351 | 4246 | return NULL; |
71645aca LP |
4247 | } |
4248 | ||
2e59b241 LP |
4249 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4250 | char *ret = NULL; | |
4251 | ||
4252 | if (!s) | |
4253 | return NULL; | |
4254 | ||
4255 | /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated | |
4256 | * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is | |
4257 | * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly | |
4258 | * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is | |
4259 | * not specified, then the return value always needs to be freed. Callers can use this to optimize memory | |
4260 | * allocations. */ | |
4261 | ||
4262 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
4263 | ret = specifier_escape(s); | |
4264 | if (!ret) | |
4265 | return NULL; | |
4266 | ||
4267 | s = ret; | |
4268 | } | |
4269 | ||
4270 | if (flags & UNIT_ESCAPE_C) { | |
4271 | char *a; | |
4272 | ||
4273 | a = cescape(s); | |
4274 | free(ret); | |
4275 | if (!a) | |
4276 | return NULL; | |
4277 | ||
4278 | ret = a; | |
4279 | } | |
4280 | ||
4281 | if (buf) { | |
4282 | *buf = ret; | |
4283 | return ret ?: (char*) s; | |
4284 | } | |
4285 | ||
4286 | return ret ?: strdup(s); | |
4287 | } | |
4288 | ||
4289 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4290 | _cleanup_free_ char *result = NULL; | |
319a4f4b | 4291 | size_t n = 0; |
2e59b241 LP |
4292 | |
4293 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a | |
4294 | * way suitable for ExecStart= stanzas */ | |
4295 | ||
4296 | STRV_FOREACH(i, l) { | |
4297 | _cleanup_free_ char *buf = NULL; | |
4298 | const char *p; | |
4299 | size_t a; | |
4300 | char *q; | |
4301 | ||
4302 | p = unit_escape_setting(*i, flags, &buf); | |
4303 | if (!p) | |
4304 | return NULL; | |
4305 | ||
4306 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
319a4f4b | 4307 | if (!GREEDY_REALLOC(result, n + a + 1)) |
2e59b241 LP |
4308 | return NULL; |
4309 | ||
4310 | q = result + n; | |
4311 | if (n > 0) | |
4312 | *(q++) = ' '; | |
4313 | ||
4314 | *(q++) = '"'; | |
4315 | q = stpcpy(q, p); | |
4316 | *(q++) = '"'; | |
4317 | ||
4318 | n += a; | |
4319 | } | |
4320 | ||
319a4f4b | 4321 | if (!GREEDY_REALLOC(result, n + 1)) |
2e59b241 LP |
4322 | return NULL; |
4323 | ||
4324 | result[n] = 0; | |
4325 | ||
ae2a15bc | 4326 | return TAKE_PTR(result); |
2e59b241 LP |
4327 | } |
4328 | ||
4329 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4330 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4331 | const char *dir, *wrapped; |
26d04f86 | 4332 | int r; |
71645aca LP |
4333 | |
4334 | assert(u); | |
2e59b241 LP |
4335 | assert(name); |
4336 | assert(data); | |
4337 | ||
4338 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4339 | return 0; | |
4340 | ||
4341 | data = unit_escape_setting(data, flags, &escaped); | |
4342 | if (!data) | |
4343 | return -ENOMEM; | |
4344 | ||
4345 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4346 | * previous section header is the same */ | |
4347 | ||
4348 | if (flags & UNIT_PRIVATE) { | |
4349 | if (!UNIT_VTABLE(u)->private_section) | |
4350 | return -EINVAL; | |
4351 | ||
4352 | if (!u->transient_file || u->last_section_private < 0) | |
4353 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4354 | else if (u->last_section_private == 0) | |
4355 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4356 | } else { | |
4357 | if (!u->transient_file || u->last_section_private < 0) | |
4358 | data = strjoina("[Unit]\n", data); | |
4359 | else if (u->last_section_private > 0) | |
4360 | data = strjoina("\n[Unit]\n", data); | |
4361 | } | |
71645aca | 4362 | |
4f4afc88 LP |
4363 | if (u->transient_file) { |
4364 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4365 | * write to the transient unit file. */ | |
4366 | fputs(data, u->transient_file); | |
4f4afc88 | 4367 | |
2e59b241 LP |
4368 | if (!endswith(data, "\n")) |
4369 | fputc('\n', u->transient_file); | |
4370 | ||
4371 | /* Remember which section we wrote this entry to */ | |
4372 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4373 | return 0; |
2e59b241 | 4374 | } |
8e2af478 | 4375 | |
2e59b241 | 4376 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4377 | if (!dir) |
4378 | return -EINVAL; | |
71645aca | 4379 | |
2a9a6f8a | 4380 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4381 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4382 | data, |
4383 | "\n"); | |
e20b2a86 | 4384 | |
815b09d3 | 4385 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4386 | if (r < 0) |
4387 | return r; | |
4388 | ||
45639f1b | 4389 | (void) mkdir_p_label(p, 0755); |
4dba44a5 ZJS |
4390 | |
4391 | /* Make sure the drop-in dir is registered in our path cache. This way we don't need to stupidly | |
4392 | * recreate the cache after every drop-in we write. */ | |
4393 | if (u->manager->unit_path_cache) { | |
be327321 | 4394 | r = set_put_strdup(&u->manager->unit_path_cache, p); |
4dba44a5 ZJS |
4395 | if (r < 0) |
4396 | return r; | |
4397 | } | |
4398 | ||
2a9a6f8a | 4399 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4400 | if (r < 0) |
4401 | return r; | |
4402 | ||
815b09d3 | 4403 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4404 | if (r < 0) |
4405 | return r; | |
815b09d3 | 4406 | q = NULL; |
adb76a70 | 4407 | |
adb76a70 WC |
4408 | strv_uniq(u->dropin_paths); |
4409 | ||
4410 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4411 | ||
4412 | return 0; | |
26d04f86 | 4413 | } |
71645aca | 4414 | |
2e59b241 | 4415 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4416 | _cleanup_free_ char *p = NULL; |
4417 | va_list ap; | |
4418 | int r; | |
4419 | ||
4420 | assert(u); | |
4421 | assert(name); | |
4422 | assert(format); | |
4423 | ||
2e59b241 | 4424 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4425 | return 0; |
4426 | ||
4427 | va_start(ap, format); | |
4428 | r = vasprintf(&p, format, ap); | |
4429 | va_end(ap); | |
4430 | ||
4431 | if (r < 0) | |
4432 | return -ENOMEM; | |
4433 | ||
2e59b241 | 4434 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4435 | } |
71645aca | 4436 | |
c2756a68 | 4437 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4438 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4439 | FILE *f; |
4f4afc88 | 4440 | |
c2756a68 LP |
4441 | assert(u); |
4442 | ||
3f5e8115 LP |
4443 | if (!UNIT_VTABLE(u)->can_transient) |
4444 | return -EOPNOTSUPP; | |
4445 | ||
45639f1b LP |
4446 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4447 | ||
657ee2d8 | 4448 | path = path_join(u->manager->lookup_paths.transient, u->id); |
4f4afc88 LP |
4449 | if (!path) |
4450 | return -ENOMEM; | |
4451 | ||
4452 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4453 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4454 | ||
78e334b5 | 4455 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 4456 | f = fopen(path, "we"); |
0126c8f3 | 4457 | if (!f) |
78e334b5 | 4458 | return -errno; |
4f4afc88 LP |
4459 | } |
4460 | ||
0126c8f3 | 4461 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4462 | u->transient_file = f; |
4463 | ||
0126c8f3 | 4464 | free_and_replace(u->fragment_path, path); |
7c65093a | 4465 | |
7c65093a LP |
4466 | u->source_path = mfree(u->source_path); |
4467 | u->dropin_paths = strv_free(u->dropin_paths); | |
4468 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4469 | ||
4f4afc88 LP |
4470 | u->load_state = UNIT_STUB; |
4471 | u->load_error = 0; | |
4472 | u->transient = true; | |
4473 | ||
7c65093a LP |
4474 | unit_add_to_dbus_queue(u); |
4475 | unit_add_to_gc_queue(u); | |
c2756a68 | 4476 | |
4f4afc88 LP |
4477 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4478 | u->transient_file); | |
4479 | ||
3f5e8115 | 4480 | return 0; |
c2756a68 LP |
4481 | } |
4482 | ||
c53d2d54 | 4483 | static int log_kill(pid_t pid, int sig, void *userdata) { |
1d98fef1 LP |
4484 | _cleanup_free_ char *comm = NULL; |
4485 | ||
4486 | (void) get_process_comm(pid, &comm); | |
4487 | ||
4488 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4489 | only, like for example systemd's own PAM stub process. */ | |
4490 | if (comm && comm[0] == '(') | |
c53d2d54 | 4491 | return 0; |
1d98fef1 LP |
4492 | |
4493 | log_unit_notice(userdata, | |
4494 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4495 | pid, | |
4496 | strna(comm), | |
4497 | signal_to_string(sig)); | |
c53d2d54 DB |
4498 | |
4499 | return 1; | |
1d98fef1 LP |
4500 | } |
4501 | ||
4ab1670f | 4502 | static int operation_to_signal(const KillContext *c, KillOperation k, bool *noteworthy) { |
1d98fef1 LP |
4503 | assert(c); |
4504 | ||
4505 | switch (k) { | |
4506 | ||
4507 | case KILL_TERMINATE: | |
4508 | case KILL_TERMINATE_AND_LOG: | |
4ab1670f | 4509 | *noteworthy = false; |
1d98fef1 LP |
4510 | return c->kill_signal; |
4511 | ||
a232ebcc | 4512 | case KILL_RESTART: |
4ab1670f | 4513 | *noteworthy = false; |
a232ebcc ZJS |
4514 | return restart_kill_signal(c); |
4515 | ||
1d98fef1 | 4516 | case KILL_KILL: |
4ab1670f | 4517 | *noteworthy = true; |
fbb48d4c | 4518 | return c->final_kill_signal; |
1d98fef1 | 4519 | |
c87700a1 | 4520 | case KILL_WATCHDOG: |
4ab1670f | 4521 | *noteworthy = true; |
c87700a1 | 4522 | return c->watchdog_signal; |
1d98fef1 LP |
4523 | |
4524 | default: | |
04499a70 | 4525 | assert_not_reached(); |
1d98fef1 LP |
4526 | } |
4527 | } | |
4528 | ||
cd2086fe LP |
4529 | int unit_kill_context( |
4530 | Unit *u, | |
4531 | KillContext *c, | |
db2cb23b | 4532 | KillOperation k, |
cd2086fe LP |
4533 | pid_t main_pid, |
4534 | pid_t control_pid, | |
4535 | bool main_pid_alien) { | |
4536 | ||
1d98fef1 | 4537 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4538 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4539 | int sig, r; |
cd2086fe LP |
4540 | |
4541 | assert(u); | |
4542 | assert(c); | |
4543 | ||
8aff7ac4 LP |
4544 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. Returns > 0 |
4545 | * if we killed something worth waiting for, 0 otherwise. Do not confuse with unit_kill_common() | |
4546 | * which is used for user-requested killing of unit processes. */ | |
1d98fef1 | 4547 | |
cd2086fe LP |
4548 | if (c->kill_mode == KILL_NONE) |
4549 | return 0; | |
4550 | ||
4ab1670f ZJS |
4551 | bool noteworthy; |
4552 | sig = operation_to_signal(c, k, ¬eworthy); | |
4553 | if (noteworthy) | |
4554 | log_func = log_kill; | |
1d98fef1 LP |
4555 | |
4556 | send_sighup = | |
4557 | c->send_sighup && | |
4558 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4559 | sig != SIGHUP; | |
4560 | ||
cd2086fe | 4561 | if (main_pid > 0) { |
1d98fef1 LP |
4562 | if (log_func) |
4563 | log_func(main_pid, sig, u); | |
cd2086fe | 4564 | |
1d98fef1 | 4565 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4566 | if (r < 0 && r != -ESRCH) { |
4567 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4568 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 4569 | |
b821a397 | 4570 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 4571 | } else { |
bc6aed7b LP |
4572 | if (!main_pid_alien) |
4573 | wait_for_exit = true; | |
82659fd7 | 4574 | |
1d98fef1 | 4575 | if (r != -ESRCH && send_sighup) |
d0667321 | 4576 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 4577 | } |
cd2086fe LP |
4578 | } |
4579 | ||
4580 | if (control_pid > 0) { | |
1d98fef1 LP |
4581 | if (log_func) |
4582 | log_func(control_pid, sig, u); | |
cd2086fe | 4583 | |
1d98fef1 | 4584 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4585 | if (r < 0 && r != -ESRCH) { |
4586 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4587 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 4588 | |
b821a397 | 4589 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 4590 | } else { |
cd2086fe | 4591 | wait_for_exit = true; |
82659fd7 | 4592 | |
1d98fef1 | 4593 | if (r != -ESRCH && send_sighup) |
d0667321 | 4594 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 4595 | } |
cd2086fe LP |
4596 | } |
4597 | ||
b821a397 LP |
4598 | if (u->cgroup_path && |
4599 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4600 | _cleanup_set_free_ Set *pid_set = NULL; |
4601 | ||
82659fd7 LP |
4602 | /* Exclude the main/control pids from being killed via the cgroup */ |
4603 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4604 | if (!pid_set) |
4605 | return -ENOMEM; | |
4606 | ||
1d98fef1 LP |
4607 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4608 | sig, | |
4609 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4610 | pid_set, | |
4611 | log_func, u); | |
cd2086fe | 4612 | if (r < 0) { |
4c701096 | 4613 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
6178e2f8 | 4614 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", empty_to_root(u->cgroup_path)); |
b821a397 | 4615 | |
82659fd7 | 4616 | } else if (r > 0) { |
bc6aed7b | 4617 | |
1d9cc876 LP |
4618 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4619 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
4620 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
4621 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
4622 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
4623 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 4624 | |
c22800e4 | 4625 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 4626 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 4627 | wait_for_exit = true; |
58ea275a | 4628 | |
1d98fef1 | 4629 | if (send_sighup) { |
82659fd7 LP |
4630 | set_free(pid_set); |
4631 | ||
4632 | pid_set = unit_pid_set(main_pid, control_pid); | |
4633 | if (!pid_set) | |
4634 | return -ENOMEM; | |
4635 | ||
c8aa4b5b LP |
4636 | (void) cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4637 | SIGHUP, | |
4638 | CGROUP_IGNORE_SELF, | |
4639 | pid_set, | |
4640 | NULL, NULL); | |
82659fd7 LP |
4641 | } |
4642 | } | |
cd2086fe LP |
4643 | } |
4644 | ||
4645 | return wait_for_exit; | |
4646 | } | |
4647 | ||
eef85c4a | 4648 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
a57f7e2c LP |
4649 | int r; |
4650 | ||
4651 | assert(u); | |
4652 | assert(path); | |
4653 | ||
ac19bdd0 ZJS |
4654 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these |
4655 | * paths in the unit (from the path to the UnitDependencyInfo structure indicating how to the | |
4656 | * dependency came to be). However, we build a prefix table for all possible prefixes so that new | |
4657 | * appearing mount units can easily determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4658 | |
70b64bd3 ZJS |
4659 | if (!path_is_absolute(path)) |
4660 | return -EINVAL; | |
4661 | ||
ac19bdd0 ZJS |
4662 | if (hashmap_contains(u->requires_mounts_for, path)) /* Exit quickly if the path is already covered. */ |
4663 | return 0; | |
eef85c4a | 4664 | |
ac19bdd0 | 4665 | _cleanup_free_ char *p = strdup(path); |
a57f7e2c LP |
4666 | if (!p) |
4667 | return -ENOMEM; | |
4668 | ||
ac19bdd0 ZJS |
4669 | /* Use the canonical form of the path as the stored key. We call path_is_normalized() |
4670 | * only after simplification, since path_is_normalized() rejects paths with '.'. | |
4671 | * path_is_normalized() also verifies that the path fits in PATH_MAX. */ | |
4ff361cc | 4672 | path = path_simplify(p); |
a57f7e2c | 4673 | |
ca8700e9 | 4674 | if (!path_is_normalized(path)) |
a57f7e2c | 4675 | return -EPERM; |
a57f7e2c | 4676 | |
ac19bdd0 | 4677 | UnitDependencyInfo di = { |
eef85c4a LP |
4678 | .origin_mask = mask |
4679 | }; | |
4680 | ||
ac19bdd0 | 4681 | r = hashmap_ensure_put(&u->requires_mounts_for, &path_hash_ops, p, di.data); |
ca8700e9 | 4682 | if (r < 0) |
a57f7e2c | 4683 | return r; |
ac19bdd0 ZJS |
4684 | assert(r > 0); |
4685 | TAKE_PTR(p); /* path remains a valid pointer to the string stored in the hashmap */ | |
a57f7e2c | 4686 | |
4cb06c59 | 4687 | char prefix[strlen(path) + 1]; |
ca8700e9 | 4688 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
a57f7e2c LP |
4689 | Set *x; |
4690 | ||
4691 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4692 | if (!x) { | |
ca8700e9 | 4693 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 4694 | |
548f6937 | 4695 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
742f41ad LP |
4696 | if (r < 0) |
4697 | return r; | |
a57f7e2c LP |
4698 | |
4699 | q = strdup(prefix); | |
4700 | if (!q) | |
4701 | return -ENOMEM; | |
4702 | ||
d5099efc | 4703 | x = set_new(NULL); |
ca8700e9 | 4704 | if (!x) |
a57f7e2c | 4705 | return -ENOMEM; |
a57f7e2c LP |
4706 | |
4707 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4708 | if (r < 0) { | |
a57f7e2c LP |
4709 | set_free(x); |
4710 | return r; | |
4711 | } | |
ca8700e9 | 4712 | q = NULL; |
a57f7e2c LP |
4713 | } |
4714 | ||
4715 | r = set_put(x, u); | |
4716 | if (r < 0) | |
4717 | return r; | |
4718 | } | |
4719 | ||
4720 | return 0; | |
4721 | } | |
4722 | ||
613b411c LP |
4723 | int unit_setup_exec_runtime(Unit *u) { |
4724 | ExecRuntime **rt; | |
4725 | size_t offset; | |
613b411c | 4726 | Unit *other; |
e8a565cb | 4727 | int r; |
613b411c LP |
4728 | |
4729 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4730 | assert(offset > 0); | |
4731 | ||
06b643e7 | 4732 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
4733 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
4734 | if (*rt) | |
4735 | return 0; | |
4736 | ||
4737 | /* Try to get it from somebody else */ | |
15ed3c3a | 4738 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_JOINS_NAMESPACE_OF) { |
e8a565cb YW |
4739 | r = exec_runtime_acquire(u->manager, NULL, other->id, false, rt); |
4740 | if (r == 1) | |
4741 | return 1; | |
613b411c LP |
4742 | } |
4743 | ||
e8a565cb | 4744 | return exec_runtime_acquire(u->manager, unit_get_exec_context(u), u->id, true, rt); |
613b411c LP |
4745 | } |
4746 | ||
29206d46 LP |
4747 | int unit_setup_dynamic_creds(Unit *u) { |
4748 | ExecContext *ec; | |
4749 | DynamicCreds *dcreds; | |
4750 | size_t offset; | |
4751 | ||
4752 | assert(u); | |
4753 | ||
4754 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
4755 | assert(offset > 0); | |
4756 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
4757 | ||
4758 | ec = unit_get_exec_context(u); | |
4759 | assert(ec); | |
4760 | ||
4761 | if (!ec->dynamic_user) | |
4762 | return 0; | |
4763 | ||
4764 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
4765 | } | |
4766 | ||
1c2e9646 LP |
4767 | bool unit_type_supported(UnitType t) { |
4768 | if (_unlikely_(t < 0)) | |
4769 | return false; | |
4770 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
4771 | return false; | |
4772 | ||
4773 | if (!unit_vtable[t]->supported) | |
4774 | return true; | |
4775 | ||
4776 | return unit_vtable[t]->supported(); | |
4777 | } | |
4778 | ||
8b4305c7 LP |
4779 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
4780 | int r; | |
4781 | ||
4782 | assert(u); | |
4783 | assert(where); | |
4784 | ||
c2503e35 RH |
4785 | if (!unit_log_level_test(u, LOG_NOTICE)) |
4786 | return; | |
4787 | ||
db55bbf2 | 4788 | r = dir_is_empty(where, /* ignore_hidden_or_backup= */ false); |
3f602115 | 4789 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
4790 | return; |
4791 | if (r < 0) { | |
4792 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
4793 | return; | |
4794 | } | |
4795 | ||
c2503e35 RH |
4796 | log_unit_struct(u, LOG_NOTICE, |
4797 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
4798 | LOG_UNIT_INVOCATION_ID(u), | |
4799 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
4800 | "WHERE=%s", where); | |
8b4305c7 LP |
4801 | } |
4802 | ||
25cd4964 | 4803 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
58d9d89b | 4804 | _cleanup_free_ char *canonical_where = NULL; |
8b4305c7 LP |
4805 | int r; |
4806 | ||
4807 | assert(u); | |
4808 | assert(where); | |
4809 | ||
a5648b80 | 4810 | r = chase_symlinks(where, NULL, CHASE_NONEXISTENT, &canonical_where, NULL); |
8b4305c7 | 4811 | if (r < 0) { |
25cd4964 | 4812 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
4813 | return 0; |
4814 | } | |
25cd4964 AJ |
4815 | |
4816 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
4817 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
4818 | return 0; |
4819 | ||
25cd4964 | 4820 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
c2503e35 RH |
4821 | log_unit_struct(u, LOG_ERR, |
4822 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
4823 | LOG_UNIT_INVOCATION_ID(u), | |
4824 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), | |
4825 | "WHERE=%s", where); | |
8b4305c7 LP |
4826 | |
4827 | return -ELOOP; | |
4828 | } | |
0f13f3bd LP |
4829 | |
4830 | bool unit_is_pristine(Unit *u) { | |
4831 | assert(u); | |
4832 | ||
7c65093a | 4833 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
4834 | * in a number of different ways. Note that to cater for unit |
4835 | * types such as slice, we are generally fine with units that | |
e9e8cbc8 ZJS |
4836 | * are marked UNIT_LOADED even though nothing was actually |
4837 | * loaded, as those unit types don't require a file on disk. */ | |
0f13f3bd LP |
4838 | |
4839 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
4840 | u->fragment_path || | |
4841 | u->source_path || | |
4842 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
4843 | u->job || |
4844 | u->merged_into); | |
4845 | } | |
291d565a LP |
4846 | |
4847 | pid_t unit_control_pid(Unit *u) { | |
4848 | assert(u); | |
4849 | ||
4850 | if (UNIT_VTABLE(u)->control_pid) | |
4851 | return UNIT_VTABLE(u)->control_pid(u); | |
4852 | ||
4853 | return 0; | |
4854 | } | |
4855 | ||
4856 | pid_t unit_main_pid(Unit *u) { | |
4857 | assert(u); | |
4858 | ||
4859 | if (UNIT_VTABLE(u)->main_pid) | |
4860 | return UNIT_VTABLE(u)->main_pid(u); | |
4861 | ||
4862 | return 0; | |
4863 | } | |
00d9ef85 LP |
4864 | |
4865 | static void unit_unref_uid_internal( | |
4866 | Unit *u, | |
4867 | uid_t *ref_uid, | |
4868 | bool destroy_now, | |
4869 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
4870 | ||
4871 | assert(u); | |
4872 | assert(ref_uid); | |
4873 | assert(_manager_unref_uid); | |
4874 | ||
4875 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
4876 | * gid_t are actually the same time, with the same validity rules. | |
4877 | * | |
4878 | * Drops a reference to UID/GID from a unit. */ | |
4879 | ||
4880 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4881 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4882 | ||
4883 | if (!uid_is_valid(*ref_uid)) | |
4884 | return; | |
4885 | ||
4886 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
4887 | *ref_uid = UID_INVALID; | |
4888 | } | |
4889 | ||
b90cf102 | 4890 | static void unit_unref_uid(Unit *u, bool destroy_now) { |
00d9ef85 LP |
4891 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); |
4892 | } | |
4893 | ||
b90cf102 | 4894 | static void unit_unref_gid(Unit *u, bool destroy_now) { |
00d9ef85 LP |
4895 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); |
4896 | } | |
4897 | ||
b90cf102 LP |
4898 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { |
4899 | assert(u); | |
4900 | ||
4901 | unit_unref_uid(u, destroy_now); | |
4902 | unit_unref_gid(u, destroy_now); | |
4903 | } | |
4904 | ||
00d9ef85 LP |
4905 | static int unit_ref_uid_internal( |
4906 | Unit *u, | |
4907 | uid_t *ref_uid, | |
4908 | uid_t uid, | |
4909 | bool clean_ipc, | |
4910 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
4911 | ||
4912 | int r; | |
4913 | ||
4914 | assert(u); | |
4915 | assert(ref_uid); | |
4916 | assert(uid_is_valid(uid)); | |
4917 | assert(_manager_ref_uid); | |
4918 | ||
4919 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
4920 | * are actually the same type, and have the same validity rules. | |
4921 | * | |
4922 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
4923 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
4924 | * drops to zero. */ | |
4925 | ||
4926 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4927 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4928 | ||
4929 | if (*ref_uid == uid) | |
4930 | return 0; | |
4931 | ||
4932 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
4933 | return -EBUSY; | |
4934 | ||
4935 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
4936 | if (r < 0) | |
4937 | return r; | |
4938 | ||
4939 | *ref_uid = uid; | |
4940 | return 1; | |
4941 | } | |
4942 | ||
b90cf102 | 4943 | static int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { |
00d9ef85 LP |
4944 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); |
4945 | } | |
4946 | ||
b90cf102 | 4947 | static int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { |
00d9ef85 LP |
4948 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); |
4949 | } | |
4950 | ||
4951 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
4952 | int r = 0, q = 0; | |
4953 | ||
4954 | assert(u); | |
4955 | ||
4956 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
4957 | ||
4958 | if (uid_is_valid(uid)) { | |
4959 | r = unit_ref_uid(u, uid, clean_ipc); | |
4960 | if (r < 0) | |
4961 | return r; | |
4962 | } | |
4963 | ||
4964 | if (gid_is_valid(gid)) { | |
4965 | q = unit_ref_gid(u, gid, clean_ipc); | |
4966 | if (q < 0) { | |
4967 | if (r > 0) | |
4968 | unit_unref_uid(u, false); | |
4969 | ||
4970 | return q; | |
4971 | } | |
4972 | } | |
4973 | ||
4974 | return r > 0 || q > 0; | |
4975 | } | |
4976 | ||
4977 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
4978 | ExecContext *c; | |
4979 | int r; | |
4980 | ||
4981 | assert(u); | |
4982 | ||
4983 | c = unit_get_exec_context(u); | |
4984 | ||
4985 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
4986 | if (r < 0) | |
4987 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
4988 | ||
4989 | return r; | |
4990 | } | |
4991 | ||
00d9ef85 LP |
4992 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { |
4993 | int r; | |
4994 | ||
4995 | assert(u); | |
4996 | ||
4997 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
4998 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
4999 | * objects when no service references the UID/GID anymore. */ | |
5000 | ||
5001 | r = unit_ref_uid_gid(u, uid, gid); | |
5002 | if (r > 0) | |
37d0b962 | 5003 | unit_add_to_dbus_queue(u); |
00d9ef85 | 5004 | } |
4b58153d | 5005 | |
4b58153d LP |
5006 | int unit_acquire_invocation_id(Unit *u) { |
5007 | sd_id128_t id; | |
5008 | int r; | |
5009 | ||
5010 | assert(u); | |
5011 | ||
5012 | r = sd_id128_randomize(&id); | |
5013 | if (r < 0) | |
5014 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
5015 | ||
5016 | r = unit_set_invocation_id(u, id); | |
5017 | if (r < 0) | |
5018 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
5019 | ||
af92c603 | 5020 | unit_add_to_dbus_queue(u); |
4b58153d LP |
5021 | return 0; |
5022 | } | |
f0d47797 | 5023 | |
1ad6e8b3 LP |
5024 | int unit_set_exec_params(Unit *u, ExecParameters *p) { |
5025 | int r; | |
5026 | ||
7960b0c7 LP |
5027 | assert(u); |
5028 | assert(p); | |
f0d47797 | 5029 | |
004c7f16 | 5030 | /* Copy parameters from manager */ |
1ad6e8b3 LP |
5031 | r = manager_get_effective_environment(u->manager, &p->environment); |
5032 | if (r < 0) | |
5033 | return r; | |
5034 | ||
004c7f16 LP |
5035 | p->confirm_spawn = manager_get_confirm_spawn(u->manager); |
5036 | p->cgroup_supported = u->manager->cgroup_supported; | |
5037 | p->prefix = u->manager->prefix; | |
5038 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
5039 | ||
5238e957 | 5040 | /* Copy parameters from unit */ |
7960b0c7 | 5041 | p->cgroup_path = u->cgroup_path; |
1d9cc876 | 5042 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
1ad6e8b3 | 5043 | |
2ad591a3 LP |
5044 | p->received_credentials_directory = u->manager->received_credentials_directory; |
5045 | p->received_encrypted_credentials_directory = u->manager->received_encrypted_credentials_directory; | |
bb0c0d6f | 5046 | |
1ad6e8b3 | 5047 | return 0; |
f0d47797 | 5048 | } |
a79279c7 | 5049 | |
4c253ed1 | 5050 | int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) { |
a79279c7 LP |
5051 | int r; |
5052 | ||
5053 | assert(u); | |
5054 | assert(ret); | |
5055 | ||
5056 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
5057 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
5058 | ||
5059 | (void) unit_realize_cgroup(u); | |
5060 | ||
4c253ed1 LP |
5061 | r = safe_fork(name, FORK_REOPEN_LOG, ret); |
5062 | if (r != 0) | |
5063 | return r; | |
a79279c7 | 5064 | |
9c274488 LP |
5065 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE); |
5066 | (void) ignore_signals(SIGPIPE); | |
a79279c7 | 5067 | |
4c253ed1 | 5068 | (void) prctl(PR_SET_PDEATHSIG, SIGTERM); |
a79279c7 | 5069 | |
4c253ed1 LP |
5070 | if (u->cgroup_path) { |
5071 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
5072 | if (r < 0) { | |
6178e2f8 | 5073 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", empty_to_root(u->cgroup_path)); |
4c253ed1 | 5074 | _exit(EXIT_CGROUP); |
a79279c7 | 5075 | } |
a79279c7 LP |
5076 | } |
5077 | ||
4c253ed1 | 5078 | return 0; |
a79279c7 | 5079 | } |
c999cf38 | 5080 | |
810ef318 YW |
5081 | int unit_fork_and_watch_rm_rf(Unit *u, char **paths, pid_t *ret_pid) { |
5082 | pid_t pid; | |
5083 | int r; | |
5084 | ||
5085 | assert(u); | |
5086 | assert(ret_pid); | |
5087 | ||
5088 | r = unit_fork_helper_process(u, "(sd-rmrf)", &pid); | |
5089 | if (r < 0) | |
5090 | return r; | |
5091 | if (r == 0) { | |
5092 | int ret = EXIT_SUCCESS; | |
810ef318 YW |
5093 | |
5094 | STRV_FOREACH(i, paths) { | |
5095 | r = rm_rf(*i, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_MISSING_OK); | |
5096 | if (r < 0) { | |
5097 | log_error_errno(r, "Failed to remove '%s': %m", *i); | |
5098 | ret = EXIT_FAILURE; | |
5099 | } | |
5100 | } | |
5101 | ||
5102 | _exit(ret); | |
5103 | } | |
5104 | ||
5105 | r = unit_watch_pid(u, pid, true); | |
5106 | if (r < 0) | |
5107 | return r; | |
5108 | ||
5109 | *ret_pid = pid; | |
5110 | return 0; | |
5111 | } | |
5112 | ||
15ed3c3a LP |
5113 | static void unit_update_dependency_mask(Hashmap *deps, Unit *other, UnitDependencyInfo di) { |
5114 | assert(deps); | |
c999cf38 LP |
5115 | assert(other); |
5116 | ||
15ed3c3a | 5117 | if (di.origin_mask == 0 && di.destination_mask == 0) |
c999cf38 | 5118 | /* No bit set anymore, let's drop the whole entry */ |
15ed3c3a LP |
5119 | assert_se(hashmap_remove(deps, other)); |
5120 | else | |
c999cf38 | 5121 | /* Mask was reduced, let's update the entry */ |
15ed3c3a | 5122 | assert_se(hashmap_update(deps, other, di.data) == 0); |
c999cf38 LP |
5123 | } |
5124 | ||
5125 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
15ed3c3a | 5126 | Hashmap *deps; |
c999cf38 LP |
5127 | assert(u); |
5128 | ||
5129 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5130 | ||
5131 | if (mask == 0) | |
5132 | return; | |
5133 | ||
15ed3c3a | 5134 | HASHMAP_FOREACH(deps, u->dependencies) { |
c999cf38 LP |
5135 | bool done; |
5136 | ||
5137 | do { | |
5138 | UnitDependencyInfo di; | |
5139 | Unit *other; | |
c999cf38 LP |
5140 | |
5141 | done = true; | |
5142 | ||
15ed3c3a LP |
5143 | HASHMAP_FOREACH_KEY(di.data, other, deps) { |
5144 | Hashmap *other_deps; | |
5145 | ||
1d6cc5d0 | 5146 | if (FLAGS_SET(~mask, di.origin_mask)) |
c999cf38 | 5147 | continue; |
15ed3c3a | 5148 | |
c999cf38 | 5149 | di.origin_mask &= ~mask; |
15ed3c3a | 5150 | unit_update_dependency_mask(deps, other, di); |
c999cf38 | 5151 | |
defe63b0 LP |
5152 | /* We updated the dependency from our unit to the other unit now. But most |
5153 | * dependencies imply a reverse dependency. Hence, let's delete that one | |
5154 | * too. For that we go through all dependency types on the other unit and | |
5155 | * delete all those which point to us and have the right mask set. */ | |
c999cf38 | 5156 | |
15ed3c3a | 5157 | HASHMAP_FOREACH(other_deps, other->dependencies) { |
c999cf38 LP |
5158 | UnitDependencyInfo dj; |
5159 | ||
15ed3c3a | 5160 | dj.data = hashmap_get(other_deps, u); |
1d6cc5d0 | 5161 | if (FLAGS_SET(~mask, dj.destination_mask)) |
c999cf38 | 5162 | continue; |
c999cf38 | 5163 | |
15ed3c3a LP |
5164 | dj.destination_mask &= ~mask; |
5165 | unit_update_dependency_mask(other_deps, u, dj); | |
c999cf38 LP |
5166 | } |
5167 | ||
5168 | unit_add_to_gc_queue(other); | |
5169 | ||
156ba52b YW |
5170 | /* The unit 'other' may not be wanted by the unit 'u'. */ |
5171 | unit_submit_to_stop_when_unneeded_queue(other); | |
5172 | ||
c999cf38 LP |
5173 | done = false; |
5174 | break; | |
5175 | } | |
5176 | ||
5177 | } while (!done); | |
5178 | } | |
5179 | } | |
d3070fbd | 5180 | |
2f8c48b6 AZ |
5181 | static int unit_get_invocation_path(Unit *u, char **ret) { |
5182 | char *p; | |
5183 | int r; | |
5184 | ||
5185 | assert(u); | |
5186 | assert(ret); | |
5187 | ||
5188 | if (MANAGER_IS_SYSTEM(u->manager)) | |
5189 | p = strjoin("/run/systemd/units/invocation:", u->id); | |
5190 | else { | |
5191 | _cleanup_free_ char *user_path = NULL; | |
5192 | r = xdg_user_runtime_dir(&user_path, "/systemd/units/invocation:"); | |
5193 | if (r < 0) | |
5194 | return r; | |
5195 | p = strjoin(user_path, u->id); | |
5196 | } | |
5197 | ||
5198 | if (!p) | |
5199 | return -ENOMEM; | |
5200 | ||
5201 | *ret = p; | |
5202 | return 0; | |
5203 | } | |
5204 | ||
d3070fbd | 5205 | static int unit_export_invocation_id(Unit *u) { |
2f8c48b6 | 5206 | _cleanup_free_ char *p = NULL; |
d3070fbd LP |
5207 | int r; |
5208 | ||
5209 | assert(u); | |
5210 | ||
5211 | if (u->exported_invocation_id) | |
5212 | return 0; | |
5213 | ||
5214 | if (sd_id128_is_null(u->invocation_id)) | |
5215 | return 0; | |
5216 | ||
2f8c48b6 AZ |
5217 | r = unit_get_invocation_path(u, &p); |
5218 | if (r < 0) | |
5219 | return log_unit_debug_errno(u, r, "Failed to get invocation path: %m"); | |
5220 | ||
a3f5fd96 | 5221 | r = symlink_atomic_label(u->invocation_id_string, p); |
d3070fbd LP |
5222 | if (r < 0) |
5223 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5224 | ||
5225 | u->exported_invocation_id = true; | |
5226 | return 0; | |
5227 | } | |
5228 | ||
5229 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5230 | const char *p; | |
5231 | char buf[2]; | |
5232 | int r; | |
5233 | ||
5234 | assert(u); | |
5235 | assert(c); | |
5236 | ||
5237 | if (u->exported_log_level_max) | |
5238 | return 0; | |
5239 | ||
5240 | if (c->log_level_max < 0) | |
5241 | return 0; | |
5242 | ||
5243 | assert(c->log_level_max <= 7); | |
5244 | ||
5245 | buf[0] = '0' + c->log_level_max; | |
5246 | buf[1] = 0; | |
5247 | ||
5248 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5249 | r = symlink_atomic(buf, p); | |
5250 | if (r < 0) | |
5251 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5252 | ||
5253 | u->exported_log_level_max = true; | |
5254 | return 0; | |
5255 | } | |
5256 | ||
5257 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5258 | _cleanup_close_ int fd = -1; | |
5259 | struct iovec *iovec; | |
5260 | const char *p; | |
5261 | char *pattern; | |
5262 | le64_t *sizes; | |
5263 | ssize_t n; | |
d3070fbd LP |
5264 | int r; |
5265 | ||
5266 | if (u->exported_log_extra_fields) | |
5267 | return 0; | |
5268 | ||
5269 | if (c->n_log_extra_fields <= 0) | |
5270 | return 0; | |
5271 | ||
5272 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5273 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5274 | ||
12375b95 | 5275 | for (size_t i = 0; i < c->n_log_extra_fields; i++) { |
d3070fbd LP |
5276 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); |
5277 | ||
5278 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5279 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5280 | } | |
5281 | ||
5282 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5283 | pattern = strjoina(p, ".XXXXXX"); | |
5284 | ||
5285 | fd = mkostemp_safe(pattern); | |
5286 | if (fd < 0) | |
5287 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5288 | ||
5289 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5290 | if (n < 0) { | |
5291 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5292 | goto fail; | |
5293 | } | |
5294 | ||
5295 | (void) fchmod(fd, 0644); | |
5296 | ||
5297 | if (rename(pattern, p) < 0) { | |
5298 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5299 | goto fail; | |
5300 | } | |
5301 | ||
5302 | u->exported_log_extra_fields = true; | |
5303 | return 0; | |
5304 | ||
5305 | fail: | |
5306 | (void) unlink(pattern); | |
5307 | return r; | |
5308 | } | |
5309 | ||
5ac1530e | 5310 | static int unit_export_log_ratelimit_interval(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5311 | _cleanup_free_ char *buf = NULL; |
5312 | const char *p; | |
5313 | int r; | |
5314 | ||
5315 | assert(u); | |
5316 | assert(c); | |
5317 | ||
5ac1530e | 5318 | if (u->exported_log_ratelimit_interval) |
90fc172e AZ |
5319 | return 0; |
5320 | ||
5ac1530e | 5321 | if (c->log_ratelimit_interval_usec == 0) |
90fc172e AZ |
5322 | return 0; |
5323 | ||
5324 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5325 | ||
5ac1530e | 5326 | if (asprintf(&buf, "%" PRIu64, c->log_ratelimit_interval_usec) < 0) |
90fc172e AZ |
5327 | return log_oom(); |
5328 | ||
5329 | r = symlink_atomic(buf, p); | |
5330 | if (r < 0) | |
5331 | return log_unit_debug_errno(u, r, "Failed to create log rate limit interval symlink %s: %m", p); | |
5332 | ||
5ac1530e | 5333 | u->exported_log_ratelimit_interval = true; |
90fc172e AZ |
5334 | return 0; |
5335 | } | |
5336 | ||
5ac1530e | 5337 | static int unit_export_log_ratelimit_burst(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5338 | _cleanup_free_ char *buf = NULL; |
5339 | const char *p; | |
5340 | int r; | |
5341 | ||
5342 | assert(u); | |
5343 | assert(c); | |
5344 | ||
5ac1530e | 5345 | if (u->exported_log_ratelimit_burst) |
90fc172e AZ |
5346 | return 0; |
5347 | ||
5ac1530e | 5348 | if (c->log_ratelimit_burst == 0) |
90fc172e AZ |
5349 | return 0; |
5350 | ||
5351 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5352 | ||
5ac1530e | 5353 | if (asprintf(&buf, "%u", c->log_ratelimit_burst) < 0) |
90fc172e AZ |
5354 | return log_oom(); |
5355 | ||
5356 | r = symlink_atomic(buf, p); | |
5357 | if (r < 0) | |
5358 | return log_unit_debug_errno(u, r, "Failed to create log rate limit burst symlink %s: %m", p); | |
5359 | ||
5ac1530e | 5360 | u->exported_log_ratelimit_burst = true; |
90fc172e AZ |
5361 | return 0; |
5362 | } | |
5363 | ||
d3070fbd LP |
5364 | void unit_export_state_files(Unit *u) { |
5365 | const ExecContext *c; | |
5366 | ||
5367 | assert(u); | |
5368 | ||
5369 | if (!u->id) | |
5370 | return; | |
5371 | ||
638cece4 | 5372 | if (MANAGER_IS_TEST_RUN(u->manager)) |
8f632531 LP |
5373 | return; |
5374 | ||
d3070fbd LP |
5375 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5376 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5377 | * the IPC system itself and PID 1 also log to the journal. | |
5378 | * | |
5379 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5380 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5381 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5382 | * namespace at least. | |
5383 | * | |
5384 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5385 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5386 | * them with one. */ | |
5387 | ||
5388 | (void) unit_export_invocation_id(u); | |
5389 | ||
2f8c48b6 AZ |
5390 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5391 | return; | |
5392 | ||
d3070fbd LP |
5393 | c = unit_get_exec_context(u); |
5394 | if (c) { | |
5395 | (void) unit_export_log_level_max(u, c); | |
5396 | (void) unit_export_log_extra_fields(u, c); | |
5ac1530e ZJS |
5397 | (void) unit_export_log_ratelimit_interval(u, c); |
5398 | (void) unit_export_log_ratelimit_burst(u, c); | |
d3070fbd LP |
5399 | } |
5400 | } | |
5401 | ||
5402 | void unit_unlink_state_files(Unit *u) { | |
5403 | const char *p; | |
5404 | ||
5405 | assert(u); | |
5406 | ||
5407 | if (!u->id) | |
5408 | return; | |
5409 | ||
d3070fbd LP |
5410 | /* Undoes the effect of unit_export_state() */ |
5411 | ||
5412 | if (u->exported_invocation_id) { | |
2f8c48b6 AZ |
5413 | _cleanup_free_ char *invocation_path = NULL; |
5414 | int r = unit_get_invocation_path(u, &invocation_path); | |
5415 | if (r >= 0) { | |
5416 | (void) unlink(invocation_path); | |
5417 | u->exported_invocation_id = false; | |
5418 | } | |
d3070fbd LP |
5419 | } |
5420 | ||
2f8c48b6 AZ |
5421 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5422 | return; | |
5423 | ||
d3070fbd LP |
5424 | if (u->exported_log_level_max) { |
5425 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5426 | (void) unlink(p); | |
5427 | ||
5428 | u->exported_log_level_max = false; | |
5429 | } | |
5430 | ||
5431 | if (u->exported_log_extra_fields) { | |
5432 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5433 | (void) unlink(p); | |
5434 | ||
5435 | u->exported_log_extra_fields = false; | |
5436 | } | |
90fc172e | 5437 | |
5ac1530e | 5438 | if (u->exported_log_ratelimit_interval) { |
90fc172e AZ |
5439 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); |
5440 | (void) unlink(p); | |
5441 | ||
5ac1530e | 5442 | u->exported_log_ratelimit_interval = false; |
90fc172e AZ |
5443 | } |
5444 | ||
5ac1530e | 5445 | if (u->exported_log_ratelimit_burst) { |
90fc172e AZ |
5446 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); |
5447 | (void) unlink(p); | |
5448 | ||
5ac1530e | 5449 | u->exported_log_ratelimit_burst = false; |
90fc172e | 5450 | } |
d3070fbd | 5451 | } |
5afe510c | 5452 | |
3c7416b6 LP |
5453 | int unit_prepare_exec(Unit *u) { |
5454 | int r; | |
5455 | ||
5456 | assert(u); | |
5457 | ||
fab34748 KL |
5458 | /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable. |
5459 | * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */ | |
5460 | r = bpf_firewall_load_custom(u); | |
5461 | if (r < 0) | |
5462 | return r; | |
5463 | ||
3c7416b6 LP |
5464 | /* Prepares everything so that we can fork of a process for this unit */ |
5465 | ||
5466 | (void) unit_realize_cgroup(u); | |
5467 | ||
5468 | if (u->reset_accounting) { | |
9b2559a1 | 5469 | (void) unit_reset_accounting(u); |
3c7416b6 LP |
5470 | u->reset_accounting = false; |
5471 | } | |
5472 | ||
5473 | unit_export_state_files(u); | |
5474 | ||
5475 | r = unit_setup_exec_runtime(u); | |
5476 | if (r < 0) | |
5477 | return r; | |
5478 | ||
5479 | r = unit_setup_dynamic_creds(u); | |
5480 | if (r < 0) | |
5481 | return r; | |
5482 | ||
5483 | return 0; | |
5484 | } | |
5485 | ||
4c425434 LP |
5486 | static bool ignore_leftover_process(const char *comm) { |
5487 | return comm && comm[0] == '('; /* Most likely our own helper process (PAM?), ignore */ | |
5488 | } | |
5489 | ||
5490 | int unit_log_leftover_process_start(pid_t pid, int sig, void *userdata) { | |
a4634b21 LP |
5491 | _cleanup_free_ char *comm = NULL; |
5492 | ||
5493 | (void) get_process_comm(pid, &comm); | |
5494 | ||
4c425434 | 5495 | if (ignore_leftover_process(comm)) |
c53d2d54 | 5496 | return 0; |
a4634b21 | 5497 | |
4c425434 LP |
5498 | /* During start we print a warning */ |
5499 | ||
a4634b21 LP |
5500 | log_unit_warning(userdata, |
5501 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5502 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5503 | pid, strna(comm)); | |
c53d2d54 DB |
5504 | |
5505 | return 1; | |
a4634b21 LP |
5506 | } |
5507 | ||
4c425434 LP |
5508 | int unit_log_leftover_process_stop(pid_t pid, int sig, void *userdata) { |
5509 | _cleanup_free_ char *comm = NULL; | |
5510 | ||
5511 | (void) get_process_comm(pid, &comm); | |
5512 | ||
5513 | if (ignore_leftover_process(comm)) | |
5514 | return 0; | |
5515 | ||
5516 | /* During stop we only print an informational message */ | |
5517 | ||
5518 | log_unit_info(userdata, | |
5519 | "Unit process " PID_FMT " (%s) remains running after unit stopped.", | |
5520 | pid, strna(comm)); | |
5521 | ||
5522 | return 1; | |
5523 | } | |
5524 | ||
5525 | int unit_warn_leftover_processes(Unit *u, cg_kill_log_func_t log_func) { | |
a4634b21 LP |
5526 | assert(u); |
5527 | ||
5528 | (void) unit_pick_cgroup_path(u); | |
5529 | ||
5530 | if (!u->cgroup_path) | |
c53d2d54 | 5531 | return 0; |
a4634b21 | 5532 | |
4c425434 | 5533 | return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_func, u); |
a4634b21 LP |
5534 | } |
5535 | ||
bb2c7685 LP |
5536 | bool unit_needs_console(Unit *u) { |
5537 | ExecContext *ec; | |
5538 | UnitActiveState state; | |
5539 | ||
5540 | assert(u); | |
5541 | ||
5542 | state = unit_active_state(u); | |
5543 | ||
5544 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5545 | return false; | |
5546 | ||
5547 | if (UNIT_VTABLE(u)->needs_console) | |
5548 | return UNIT_VTABLE(u)->needs_console(u); | |
5549 | ||
5550 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5551 | ec = unit_get_exec_context(u); | |
5552 | if (!ec) | |
5553 | return false; | |
5554 | ||
5555 | return exec_context_may_touch_console(ec); | |
5556 | } | |
5557 | ||
6592b975 LP |
5558 | int unit_pid_attachable(Unit *u, pid_t pid, sd_bus_error *error) { |
5559 | int r; | |
5560 | ||
5561 | assert(u); | |
5562 | ||
5563 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5564 | * and not a kernel thread either */ | |
5565 | ||
5566 | /* First, a simple range check */ | |
5567 | if (!pid_is_valid(pid)) | |
5568 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier " PID_FMT " is not valid.", pid); | |
5569 | ||
5570 | /* Some extra safety check */ | |
5571 | if (pid == 1 || pid == getpid_cached()) | |
3fe91079 | 5572 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager process, refusing.", pid); |
6592b975 LP |
5573 | |
5574 | /* Don't even begin to bother with kernel threads */ | |
5575 | r = is_kernel_thread(pid); | |
5576 | if (r == -ESRCH) | |
5577 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid); | |
5578 | if (r < 0) | |
5579 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid); | |
5580 | if (r > 0) | |
5581 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid); | |
5582 | ||
5583 | return 0; | |
5584 | } | |
5585 | ||
523ee2d4 LP |
5586 | void unit_log_success(Unit *u) { |
5587 | assert(u); | |
5588 | ||
edf2ee22 JM |
5589 | /* Let's show message "Deactivated successfully" in debug mode (when manager is user) rather than in info mode. |
5590 | * This message has low information value for regular users and it might be a bit overwhelming on a system with | |
5591 | * a lot of devices. */ | |
5592 | log_unit_struct(u, | |
5593 | MANAGER_IS_USER(u->manager) ? LOG_DEBUG : LOG_INFO, | |
c2503e35 RH |
5594 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR, |
5595 | LOG_UNIT_INVOCATION_ID(u), | |
5596 | LOG_UNIT_MESSAGE(u, "Deactivated successfully.")); | |
523ee2d4 LP |
5597 | } |
5598 | ||
7c047d74 LP |
5599 | void unit_log_failure(Unit *u, const char *result) { |
5600 | assert(u); | |
5601 | assert(result); | |
5602 | ||
c2503e35 RH |
5603 | log_unit_struct(u, LOG_WARNING, |
5604 | "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR, | |
5605 | LOG_UNIT_INVOCATION_ID(u), | |
5606 | LOG_UNIT_MESSAGE(u, "Failed with result '%s'.", result), | |
5607 | "UNIT_RESULT=%s", result); | |
7c047d74 LP |
5608 | } |
5609 | ||
31cd5f63 AZ |
5610 | void unit_log_skip(Unit *u, const char *result) { |
5611 | assert(u); | |
5612 | assert(result); | |
5613 | ||
c2503e35 RH |
5614 | log_unit_struct(u, LOG_INFO, |
5615 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR, | |
5616 | LOG_UNIT_INVOCATION_ID(u), | |
5617 | LOG_UNIT_MESSAGE(u, "Skipped due to '%s'.", result), | |
5618 | "UNIT_RESULT=%s", result); | |
31cd5f63 AZ |
5619 | } |
5620 | ||
91bbd9b7 LP |
5621 | void unit_log_process_exit( |
5622 | Unit *u, | |
91bbd9b7 LP |
5623 | const char *kind, |
5624 | const char *command, | |
5cc2cd1c | 5625 | bool success, |
91bbd9b7 LP |
5626 | int code, |
5627 | int status) { | |
5628 | ||
5cc2cd1c ZJS |
5629 | int level; |
5630 | ||
91bbd9b7 LP |
5631 | assert(u); |
5632 | assert(kind); | |
5633 | ||
5cc2cd1c ZJS |
5634 | /* If this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure |
5635 | * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption | |
5636 | * that the service already logged the reason at a higher log level on its own. Otherwise, make it a | |
5637 | * WARNING. */ | |
5638 | if (success) | |
5639 | level = LOG_DEBUG; | |
5640 | else if (code == CLD_EXITED) | |
5641 | level = LOG_NOTICE; | |
5642 | else | |
91bbd9b7 LP |
5643 | level = LOG_WARNING; |
5644 | ||
c2503e35 RH |
5645 | log_unit_struct(u, level, |
5646 | "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR, | |
58441bc1 | 5647 | LOG_UNIT_MESSAGE(u, "%s exited, code=%s, status=%i/%s%s", |
c2503e35 RH |
5648 | kind, |
5649 | sigchld_code_to_string(code), status, | |
5650 | strna(code == CLD_EXITED | |
5651 | ? exit_status_to_string(status, EXIT_STATUS_FULL) | |
58441bc1 ZJS |
5652 | : signal_to_string(status)), |
5653 | success ? " (success)" : ""), | |
c2503e35 RH |
5654 | "EXIT_CODE=%s", sigchld_code_to_string(code), |
5655 | "EXIT_STATUS=%i", status, | |
5656 | "COMMAND=%s", strna(command), | |
5657 | LOG_UNIT_INVOCATION_ID(u)); | |
91bbd9b7 LP |
5658 | } |
5659 | ||
7af67e9a LP |
5660 | int unit_exit_status(Unit *u) { |
5661 | assert(u); | |
5662 | ||
5663 | /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range | |
5664 | * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA | |
5665 | * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main | |
5666 | * service process has exited abnormally (signal/coredump). */ | |
5667 | ||
5668 | if (!UNIT_VTABLE(u)->exit_status) | |
5669 | return -EOPNOTSUPP; | |
5670 | ||
5671 | return UNIT_VTABLE(u)->exit_status(u); | |
5672 | } | |
5673 | ||
5674 | int unit_failure_action_exit_status(Unit *u) { | |
5675 | int r; | |
5676 | ||
5677 | assert(u); | |
5678 | ||
5679 | /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */ | |
5680 | ||
5681 | if (u->failure_action_exit_status >= 0) | |
5682 | return u->failure_action_exit_status; | |
5683 | ||
5684 | r = unit_exit_status(u); | |
5685 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5686 | return 255; | |
5687 | ||
5688 | return r; | |
5689 | } | |
5690 | ||
5691 | int unit_success_action_exit_status(Unit *u) { | |
5692 | int r; | |
5693 | ||
5694 | assert(u); | |
5695 | ||
5696 | /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */ | |
5697 | ||
5698 | if (u->success_action_exit_status >= 0) | |
5699 | return u->success_action_exit_status; | |
5700 | ||
5701 | r = unit_exit_status(u); | |
5702 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5703 | return 255; | |
5704 | ||
5705 | return r; | |
5706 | } | |
5707 | ||
a4191c9f LP |
5708 | int unit_test_trigger_loaded(Unit *u) { |
5709 | Unit *trigger; | |
5710 | ||
5711 | /* Tests whether the unit to trigger is loaded */ | |
5712 | ||
5713 | trigger = UNIT_TRIGGER(u); | |
5714 | if (!trigger) | |
e7b9f4d9 ZJS |
5715 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
5716 | "Refusing to start, no unit to trigger."); | |
a4191c9f | 5717 | if (trigger->load_state != UNIT_LOADED) |
e7b9f4d9 ZJS |
5718 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
5719 | "Refusing to start, unit %s to trigger not loaded.", trigger->id); | |
a4191c9f LP |
5720 | |
5721 | return 0; | |
5722 | } | |
5723 | ||
bb0c0d6f LP |
5724 | void unit_destroy_runtime_data(Unit *u, const ExecContext *context) { |
5725 | assert(u); | |
5726 | assert(context); | |
5727 | ||
95939aed YW |
5728 | if (context->runtime_directory_preserve_mode == EXEC_PRESERVE_NO || |
5729 | (context->runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART && !unit_will_restart(u))) | |
5730 | exec_context_destroy_runtime_directory(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME]); | |
bb0c0d6f LP |
5731 | |
5732 | exec_context_destroy_credentials(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME], u->id); | |
95939aed YW |
5733 | } |
5734 | ||
380dc8b0 LP |
5735 | int unit_clean(Unit *u, ExecCleanMask mask) { |
5736 | UnitActiveState state; | |
5737 | ||
5738 | assert(u); | |
5739 | ||
5740 | /* Special return values: | |
5741 | * | |
5742 | * -EOPNOTSUPP → cleaning not supported for this unit type | |
5743 | * -EUNATCH → cleaning not defined for this resource type | |
5744 | * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has | |
5745 | * a job queued or similar | |
5746 | */ | |
5747 | ||
5748 | if (!UNIT_VTABLE(u)->clean) | |
5749 | return -EOPNOTSUPP; | |
5750 | ||
5751 | if (mask == 0) | |
5752 | return -EUNATCH; | |
5753 | ||
5754 | if (u->load_state != UNIT_LOADED) | |
5755 | return -EBUSY; | |
5756 | ||
5757 | if (u->job) | |
5758 | return -EBUSY; | |
5759 | ||
5760 | state = unit_active_state(u); | |
5761 | if (!IN_SET(state, UNIT_INACTIVE)) | |
5762 | return -EBUSY; | |
5763 | ||
5764 | return UNIT_VTABLE(u)->clean(u, mask); | |
5765 | } | |
5766 | ||
5767 | int unit_can_clean(Unit *u, ExecCleanMask *ret) { | |
5768 | assert(u); | |
5769 | ||
5770 | if (!UNIT_VTABLE(u)->clean || | |
5771 | u->load_state != UNIT_LOADED) { | |
5772 | *ret = 0; | |
5773 | return 0; | |
5774 | } | |
5775 | ||
5776 | /* When the clean() method is set, can_clean() really should be set too */ | |
5777 | assert(UNIT_VTABLE(u)->can_clean); | |
5778 | ||
5779 | return UNIT_VTABLE(u)->can_clean(u, ret); | |
5780 | } | |
5781 | ||
d9e45bc3 MS |
5782 | bool unit_can_freeze(Unit *u) { |
5783 | assert(u); | |
5784 | ||
5785 | if (UNIT_VTABLE(u)->can_freeze) | |
5786 | return UNIT_VTABLE(u)->can_freeze(u); | |
5787 | ||
5788 | return UNIT_VTABLE(u)->freeze; | |
5789 | } | |
5790 | ||
5791 | void unit_frozen(Unit *u) { | |
5792 | assert(u); | |
5793 | ||
5794 | u->freezer_state = FREEZER_FROZEN; | |
5795 | ||
5796 | bus_unit_send_pending_freezer_message(u); | |
5797 | } | |
5798 | ||
5799 | void unit_thawed(Unit *u) { | |
5800 | assert(u); | |
5801 | ||
5802 | u->freezer_state = FREEZER_RUNNING; | |
5803 | ||
5804 | bus_unit_send_pending_freezer_message(u); | |
5805 | } | |
5806 | ||
5807 | static int unit_freezer_action(Unit *u, FreezerAction action) { | |
5808 | UnitActiveState s; | |
5809 | int (*method)(Unit*); | |
5810 | int r; | |
5811 | ||
5812 | assert(u); | |
5813 | assert(IN_SET(action, FREEZER_FREEZE, FREEZER_THAW)); | |
5814 | ||
5815 | method = action == FREEZER_FREEZE ? UNIT_VTABLE(u)->freeze : UNIT_VTABLE(u)->thaw; | |
5816 | if (!method || !cg_freezer_supported()) | |
5817 | return -EOPNOTSUPP; | |
5818 | ||
5819 | if (u->job) | |
5820 | return -EBUSY; | |
5821 | ||
5822 | if (u->load_state != UNIT_LOADED) | |
5823 | return -EHOSTDOWN; | |
5824 | ||
5825 | s = unit_active_state(u); | |
5826 | if (s != UNIT_ACTIVE) | |
5827 | return -EHOSTDOWN; | |
5828 | ||
5829 | if (IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_THAWING)) | |
5830 | return -EALREADY; | |
5831 | ||
5832 | r = method(u); | |
5833 | if (r <= 0) | |
5834 | return r; | |
5835 | ||
d171e72e YW |
5836 | assert(IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_THAWING)); |
5837 | ||
d9e45bc3 MS |
5838 | return 1; |
5839 | } | |
5840 | ||
5841 | int unit_freeze(Unit *u) { | |
5842 | return unit_freezer_action(u, FREEZER_FREEZE); | |
5843 | } | |
5844 | ||
5845 | int unit_thaw(Unit *u) { | |
5846 | return unit_freezer_action(u, FREEZER_THAW); | |
5847 | } | |
5848 | ||
5849 | /* Wrappers around low-level cgroup freezer operations common for service and scope units */ | |
5850 | int unit_freeze_vtable_common(Unit *u) { | |
5851 | return unit_cgroup_freezer_action(u, FREEZER_FREEZE); | |
5852 | } | |
5853 | ||
5854 | int unit_thaw_vtable_common(Unit *u) { | |
5855 | return unit_cgroup_freezer_action(u, FREEZER_THAW); | |
5856 | } | |
5857 | ||
6e548561 | 5858 | Condition *unit_find_failed_condition(Unit *u) { |
03677889 | 5859 | Condition *failed_trigger = NULL; |
6e548561 DDM |
5860 | bool has_succeeded_trigger = false; |
5861 | ||
5862 | if (u->condition_result) | |
5863 | return NULL; | |
5864 | ||
5865 | LIST_FOREACH(conditions, c, u->conditions) | |
5866 | if (c->trigger) { | |
5867 | if (c->result == CONDITION_SUCCEEDED) | |
5868 | has_succeeded_trigger = true; | |
5869 | else if (!failed_trigger) | |
5870 | failed_trigger = c; | |
5871 | } else if (c->result != CONDITION_SUCCEEDED) | |
5872 | return c; | |
5873 | ||
5874 | return failed_trigger && !has_succeeded_trigger ? failed_trigger : NULL; | |
5875 | } | |
5876 | ||
5afe510c LP |
5877 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
5878 | [COLLECT_INACTIVE] = "inactive", | |
5879 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
5880 | }; | |
5881 | ||
5882 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); | |
15ed3c3a LP |
5883 | |
5884 | Unit* unit_has_dependency(const Unit *u, UnitDependencyAtom atom, Unit *other) { | |
5885 | Unit *i; | |
5886 | ||
5887 | assert(u); | |
5888 | ||
5889 | /* Checks if the unit has a dependency on 'other' with the specified dependency atom. If 'other' is | |
5890 | * NULL checks if the unit has *any* dependency of that atom. Returns 'other' if found (or if 'other' | |
5891 | * is NULL the first entry found), or NULL if not found. */ | |
5892 | ||
5893 | UNIT_FOREACH_DEPENDENCY(i, u, atom) | |
5894 | if (!other || other == i) | |
5895 | return i; | |
5896 | ||
5897 | return NULL; | |
5898 | } | |
5899 | ||
5900 | int unit_get_dependency_array(const Unit *u, UnitDependencyAtom atom, Unit ***ret_array) { | |
5901 | _cleanup_free_ Unit **array = NULL; | |
5902 | size_t n = 0; | |
5903 | Unit *other; | |
5904 | ||
5905 | assert(u); | |
5906 | assert(ret_array); | |
5907 | ||
5908 | /* Gets a list of units matching a specific atom as array. This is useful when iterating through | |
5909 | * dependencies while modifying them: the array is an "atomic snapshot" of sorts, that can be read | |
48008c1c | 5910 | * while the dependency table is continuously updated. */ |
15ed3c3a LP |
5911 | |
5912 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
5913 | if (!GREEDY_REALLOC(array, n + 1)) | |
5914 | return -ENOMEM; | |
5915 | ||
5916 | array[n++] = other; | |
5917 | } | |
5918 | ||
5919 | *ret_array = TAKE_PTR(array); | |
5920 | ||
5921 | assert(n <= INT_MAX); | |
5922 | return (int) n; | |
5923 | } |