]>
Commit | Line | Data |
---|---|---|
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" |
e30bbc90 | 20 | #include "core-varlink.h" |
4f5dd394 LP |
21 | #include "dbus-unit.h" |
22 | #include "dbus.h" | |
23 | #include "dropin.h" | |
24 | #include "escape.h" | |
25 | #include "execute.h" | |
6a48d82f | 26 | #include "fd-util.h" |
a5c32cff | 27 | #include "fileio-label.h" |
ee228be1 | 28 | #include "fileio.h" |
f97b34a6 | 29 | #include "format-util.h" |
4b58153d | 30 | #include "id128-util.h" |
5cfa33e0 | 31 | #include "install.h" |
2d3b784d | 32 | #include "io-util.h" |
a3f5fd96 | 33 | #include "label.h" |
4f5dd394 LP |
34 | #include "load-dropin.h" |
35 | #include "load-fragment.h" | |
36 | #include "log.h" | |
37 | #include "macro.h" | |
f5947a5e | 38 | #include "missing_audit.h" |
4f5dd394 LP |
39 | #include "mkdir.h" |
40 | #include "path-util.h" | |
0b452006 | 41 | #include "process-util.h" |
810ef318 | 42 | #include "rm-rf.h" |
4f5dd394 | 43 | #include "set.h" |
6eb7c172 | 44 | #include "signal-util.h" |
d3070fbd | 45 | #include "sparse-endian.h" |
e9db43d5 | 46 | #include "special.h" |
2e59b241 | 47 | #include "specifier.h" |
8fcde012 | 48 | #include "stat-util.h" |
d054f0a4 | 49 | #include "stdio-util.h" |
5afe510c | 50 | #include "string-table.h" |
07630cea | 51 | #include "string-util.h" |
4f5dd394 | 52 | #include "strv.h" |
5b262f74 | 53 | #include "terminal-util.h" |
e4de7287 | 54 | #include "tmpfile-util.h" |
4f4afc88 | 55 | #include "umask-util.h" |
4f5dd394 | 56 | #include "unit-name.h" |
e9db43d5 | 57 | #include "unit.h" |
b1d4f8e1 LP |
58 | #include "user-util.h" |
59 | #include "virt.h" | |
91ce91c7 JK |
60 | #if BPF_FRAMEWORK |
61 | #include "bpf-link.h" | |
62 | #endif | |
87f0e418 | 63 | |
37109b85 ZJS |
64 | /* Thresholds for logging at INFO level about resource consumption */ |
65 | #define MENTIONWORTHY_CPU_NSEC (1 * NSEC_PER_SEC) | |
66 | #define MENTIONWORTHY_IO_BYTES (1024 * 1024ULL) | |
67 | #define MENTIONWORTHY_IP_BYTES (0ULL) | |
68 | ||
69 | /* Thresholds for logging at INFO level about resource consumption */ | |
70 | #define NOTICEWORTHY_CPU_NSEC (10*60 * NSEC_PER_SEC) /* 10 minutes */ | |
71 | #define NOTICEWORTHY_IO_BYTES (10 * 1024 * 1024ULL) /* 10 MB */ | |
72 | #define NOTICEWORTHY_IP_BYTES (128 * 1024 * 1024ULL) /* 128 MB */ | |
73 | ||
87f0e418 LP |
74 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { |
75 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 LP |
76 | [UNIT_SOCKET] = &socket_vtable, |
77 | [UNIT_TARGET] = &target_vtable, | |
78 | [UNIT_DEVICE] = &device_vtable, | |
79 | [UNIT_MOUNT] = &mount_vtable, | |
80 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 81 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 82 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 83 | [UNIT_PATH] = &path_vtable, |
6c12b52e | 84 | [UNIT_SLICE] = &slice_vtable, |
5afe510c | 85 | [UNIT_SCOPE] = &scope_vtable, |
87f0e418 LP |
86 | }; |
87 | ||
75db809a | 88 | Unit* unit_new(Manager *m, size_t size) { |
87f0e418 LP |
89 | Unit *u; |
90 | ||
91 | assert(m); | |
ac155bb8 | 92 | assert(size >= sizeof(Unit)); |
87f0e418 | 93 | |
7d17cfbc MS |
94 | u = malloc0(size); |
95 | if (!u) | |
87f0e418 LP |
96 | return NULL; |
97 | ||
ac155bb8 MS |
98 | u->manager = m; |
99 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
100 | u->default_dependencies = true; |
101 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 102 | u->unit_file_preset = -1; |
d420282b | 103 | u->on_failure_job_mode = JOB_REPLACE; |
294446dc | 104 | u->on_success_job_mode = JOB_FAIL; |
0bb814c2 | 105 | u->cgroup_control_inotify_wd = -1; |
afcfaa69 | 106 | u->cgroup_memory_inotify_wd = -1; |
36c16a7c | 107 | u->job_timeout = USEC_INFINITY; |
a2df3ea4 | 108 | u->job_running_timeout = USEC_INFINITY; |
00d9ef85 LP |
109 | u->ref_uid = UID_INVALID; |
110 | u->ref_gid = GID_INVALID; | |
fe700f46 | 111 | u->cpu_usage_last = NSEC_INFINITY; |
17f14955 | 112 | u->cgroup_invalidated_mask |= CGROUP_MASK_BPF_FIREWALL; |
7af67e9a | 113 | u->failure_action_exit_status = u->success_action_exit_status = -1; |
87f0e418 | 114 | |
6a48d82f DM |
115 | u->ip_accounting_ingress_map_fd = -1; |
116 | u->ip_accounting_egress_map_fd = -1; | |
0fd9c28c LP |
117 | for (CGroupIOAccountingMetric i = 0; i < _CGROUP_IO_ACCOUNTING_METRIC_MAX; i++) |
118 | u->io_accounting_last[i] = UINT64_MAX; | |
119 | ||
6a48d82f DM |
120 | u->ipv4_allow_map_fd = -1; |
121 | u->ipv6_allow_map_fd = -1; | |
122 | u->ipv4_deny_map_fd = -1; | |
123 | u->ipv6_deny_map_fd = -1; | |
124 | ||
2e59b241 LP |
125 | u->last_section_private = -1; |
126 | ||
7bf081a1 | 127 | u->start_ratelimit = (RateLimit) { m->default_start_limit_interval, m->default_start_limit_burst }; |
0bc488c9 | 128 | u->auto_start_stop_ratelimit = (RateLimit) { 10 * USEC_PER_SEC, 16 }; |
bea355da | 129 | |
87f0e418 LP |
130 | return u; |
131 | } | |
132 | ||
a581e45a | 133 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
dc409696 | 134 | _cleanup_(unit_freep) Unit *u = NULL; |
a581e45a LP |
135 | int r; |
136 | ||
137 | u = unit_new(m, size); | |
138 | if (!u) | |
139 | return -ENOMEM; | |
140 | ||
141 | r = unit_add_name(u, name); | |
dc409696 | 142 | if (r < 0) |
a581e45a | 143 | return r; |
a581e45a | 144 | |
1cc6c93a YW |
145 | *ret = TAKE_PTR(u); |
146 | ||
a581e45a LP |
147 | return r; |
148 | } | |
149 | ||
303ee601 | 150 | bool unit_has_name(const Unit *u, const char *name) { |
f278026d LP |
151 | assert(u); |
152 | assert(name); | |
153 | ||
4562c355 ZJS |
154 | return streq_ptr(name, u->id) || |
155 | set_contains(u->aliases, name); | |
f278026d LP |
156 | } |
157 | ||
598459ce LP |
158 | static void unit_init(Unit *u) { |
159 | CGroupContext *cc; | |
160 | ExecContext *ec; | |
161 | KillContext *kc; | |
162 | ||
163 | assert(u); | |
164 | assert(u->manager); | |
165 | assert(u->type >= 0); | |
166 | ||
167 | cc = unit_get_cgroup_context(u); | |
168 | if (cc) { | |
169 | cgroup_context_init(cc); | |
170 | ||
171 | /* Copy in the manager defaults into the cgroup | |
172 | * context, _before_ the rest of the settings have | |
173 | * been initialized */ | |
174 | ||
175 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
13c31542 | 176 | cc->io_accounting = u->manager->default_io_accounting; |
598459ce LP |
177 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
178 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 179 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
6a48d82f | 180 | cc->ip_accounting = u->manager->default_ip_accounting; |
0af20ea2 LP |
181 | |
182 | if (u->type != UNIT_SLICE) | |
183 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
184 | } |
185 | ||
186 | ec = unit_get_exec_context(u); | |
b1edf445 | 187 | if (ec) { |
598459ce LP |
188 | exec_context_init(ec); |
189 | ||
5e37d193 FB |
190 | if (MANAGER_IS_SYSTEM(u->manager)) |
191 | ec->keyring_mode = EXEC_KEYRING_SHARED; | |
192 | else { | |
193 | ec->keyring_mode = EXEC_KEYRING_INHERIT; | |
194 | ||
195 | /* User manager might have its umask redefined by PAM or UMask=. In this | |
196 | * case let the units it manages inherit this value by default. They can | |
197 | * still tune this value through their own unit file */ | |
198 | (void) get_process_umask(getpid_cached(), &ec->umask); | |
199 | } | |
b1edf445 LP |
200 | } |
201 | ||
598459ce LP |
202 | kc = unit_get_kill_context(u); |
203 | if (kc) | |
204 | kill_context_init(kc); | |
205 | ||
206 | if (UNIT_VTABLE(u)->init) | |
207 | UNIT_VTABLE(u)->init(u); | |
208 | } | |
209 | ||
4562c355 ZJS |
210 | static int unit_add_alias(Unit *u, char *donated_name) { |
211 | int r; | |
212 | ||
213 | /* Make sure that u->names is allocated. We may leave u->names | |
214 | * empty if we fail later, but this is not a problem. */ | |
973bc32a | 215 | r = set_ensure_put(&u->aliases, &string_hash_ops, donated_name); |
4562c355 ZJS |
216 | if (r < 0) |
217 | return r; | |
218 | assert(r > 0); | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
87f0e418 | 223 | int unit_add_name(Unit *u, const char *text) { |
4562c355 | 224 | _cleanup_free_ char *name = NULL, *instance = NULL; |
87f0e418 | 225 | UnitType t; |
87f0e418 LP |
226 | int r; |
227 | ||
228 | assert(u); | |
229 | assert(text); | |
230 | ||
7410616c | 231 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 232 | if (!u->instance) |
acd1987a WY |
233 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
234 | "instance is not set when adding name '%s': %m", text); | |
87f0e418 | 235 | |
4562c355 | 236 | r = unit_name_replace_instance(text, u->instance, &name); |
7410616c | 237 | if (r < 0) |
acd1987a WY |
238 | return log_unit_debug_errno(u, r, |
239 | "failed to build instance name from '%s': %m", text); | |
7410616c | 240 | } else { |
4562c355 ZJS |
241 | name = strdup(text); |
242 | if (!name) | |
7410616c LP |
243 | return -ENOMEM; |
244 | } | |
87f0e418 | 245 | |
4562c355 | 246 | if (unit_has_name(u, name)) |
7410616c | 247 | return 0; |
4562c355 ZJS |
248 | |
249 | if (hashmap_contains(u->manager->units, name)) | |
acd1987a | 250 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EEXIST), |
4562c355 | 251 | "unit already exist when adding name '%s': %m", name); |
7410616c | 252 | |
4562c355 | 253 | if (!unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) |
acd1987a | 254 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
4562c355 | 255 | "name '%s' is invalid: %m", name); |
e537352b | 256 | |
4562c355 | 257 | t = unit_name_to_type(name); |
7410616c | 258 | if (t < 0) |
acd1987a | 259 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
cd990847 | 260 | "failed to derive unit type from name '%s': %m", name); |
87f0e418 | 261 | |
598459ce | 262 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
acd1987a WY |
263 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
264 | "unit type is illegal: u->type(%d) and t(%d) for name '%s': %m", | |
4562c355 | 265 | u->type, t, name); |
87f0e418 | 266 | |
4562c355 | 267 | r = unit_name_to_instance(name, &instance); |
e48614c4 | 268 | if (r < 0) |
4562c355 | 269 | return log_unit_debug_errno(u, r, "failed to extract instance from name '%s': %m", name); |
87f0e418 | 270 | |
4562c355 ZJS |
271 | if (instance && !unit_type_may_template(t)) |
272 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), "templates are not allowed for name '%s': %m", name); | |
9e2f7c11 | 273 | |
d383acad ZJS |
274 | /* Ensure that this unit either has no instance, or that the instance matches. */ |
275 | if (u->type != _UNIT_TYPE_INVALID && !streq_ptr(u->instance, instance)) | |
acd1987a | 276 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
ada4b34e ZJS |
277 | "cannot add name %s, the instances don't match (\"%s\" != \"%s\").", |
278 | name, instance, u->instance); | |
9e2f7c11 | 279 | |
4562c355 | 280 | if (u->id && !unit_type_may_alias(t)) |
ada4b34e ZJS |
281 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EEXIST), |
282 | "cannot add name %s, aliases are not allowed for %s units.", | |
283 | name, unit_type_to_string(t)); | |
9e2f7c11 | 284 | |
598459ce | 285 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
ada4b34e | 286 | return log_unit_warning_errno(u, SYNTHETIC_ERRNO(E2BIG), "cannot add name, manager has too many units: %m"); |
4f0f902f | 287 | |
4562c355 ZJS |
288 | /* Add name to the global hashmap first, because that's easier to undo */ |
289 | r = hashmap_put(u->manager->units, name, u); | |
7410616c | 290 | if (r < 0) |
acd1987a | 291 | return log_unit_debug_errno(u, r, "add unit to hashmap failed for name '%s': %m", text); |
87f0e418 | 292 | |
4562c355 ZJS |
293 | if (u->id) { |
294 | r = unit_add_alias(u, name); /* unit_add_alias() takes ownership of the name on success */ | |
295 | if (r < 0) { | |
296 | hashmap_remove(u->manager->units, name); | |
297 | return r; | |
298 | } | |
299 | TAKE_PTR(name); | |
300 | ||
301 | } else { | |
302 | /* A new name, we don't need the set yet. */ | |
303 | assert(u->type == _UNIT_TYPE_INVALID); | |
304 | assert(!u->instance); | |
305 | ||
ac155bb8 | 306 | u->type = t; |
4562c355 ZJS |
307 | u->id = TAKE_PTR(name); |
308 | u->instance = TAKE_PTR(instance); | |
9e2f7c11 | 309 | |
71fda00f | 310 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
598459ce | 311 | unit_init(u); |
598459ce | 312 | } |
9e2f7c11 | 313 | |
598459ce LP |
314 | unit_add_to_dbus_queue(u); |
315 | return 0; | |
87f0e418 LP |
316 | } |
317 | ||
0ae97ec1 | 318 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 319 | _cleanup_free_ char *t = NULL; |
4562c355 | 320 | char *s; |
276c3e78 | 321 | int r; |
0ae97ec1 LP |
322 | |
323 | assert(u); | |
324 | assert(name); | |
325 | ||
7410616c | 326 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 327 | if (!u->instance) |
9e2f7c11 LP |
328 | return -EINVAL; |
329 | ||
7410616c LP |
330 | r = unit_name_replace_instance(name, u->instance, &t); |
331 | if (r < 0) | |
332 | return r; | |
9e2f7c11 LP |
333 | |
334 | name = t; | |
335 | } | |
336 | ||
4562c355 ZJS |
337 | if (streq_ptr(u->id, name)) |
338 | return 0; /* Nothing to do. */ | |
339 | ||
340 | /* Selects one of the aliases of this unit as the id */ | |
341 | s = set_get(u->aliases, (char*) name); | |
9e2f7c11 | 342 | if (!s) |
0ae97ec1 LP |
343 | return -ENOENT; |
344 | ||
4562c355 ZJS |
345 | if (u->id) { |
346 | r = set_remove_and_put(u->aliases, name, u->id); | |
347 | if (r < 0) | |
348 | return r; | |
349 | } else | |
350 | assert_se(set_remove(u->aliases, name)); /* see set_get() above… */ | |
276c3e78 | 351 | |
4562c355 | 352 | u->id = s; /* Old u->id is now stored in the set, and s is not stored anywhere */ |
c1e1601e | 353 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 354 | |
0ae97ec1 LP |
355 | return 0; |
356 | } | |
357 | ||
f50e0a01 | 358 | int unit_set_description(Unit *u, const char *description) { |
84b26d51 | 359 | int r; |
f50e0a01 LP |
360 | |
361 | assert(u); | |
362 | ||
84b26d51 LP |
363 | r = free_and_strdup(&u->description, empty_to_null(description)); |
364 | if (r < 0) | |
365 | return r; | |
366 | if (r > 0) | |
367 | unit_add_to_dbus_queue(u); | |
c1e1601e | 368 | |
f50e0a01 LP |
369 | return 0; |
370 | } | |
371 | ||
f2f725e5 | 372 | bool unit_may_gc(Unit *u) { |
a354329f | 373 | UnitActiveState state; |
e98b2fbb | 374 | int r; |
5afe510c | 375 | |
701cc384 LP |
376 | assert(u); |
377 | ||
f2f725e5 ZJS |
378 | /* Checks whether the unit is ready to be unloaded for garbage collection. |
379 | * Returns true when the unit may be collected, and false if there's some | |
2641f02e ZJS |
380 | * reason to keep it loaded. |
381 | * | |
382 | * References from other units are *not* checked here. Instead, this is done | |
383 | * in unit_gc_sweep(), but using markers to properly collect dependency loops. | |
384 | */ | |
5afe510c | 385 | |
a354329f | 386 | if (u->job) |
f2f725e5 | 387 | return false; |
701cc384 | 388 | |
a354329f | 389 | if (u->nop_job) |
f2f725e5 | 390 | return false; |
6c073082 | 391 | |
a354329f LP |
392 | state = unit_active_state(u); |
393 | ||
7eb2a8a1 | 394 | /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */ |
a354329f LP |
395 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && |
396 | UNIT_VTABLE(u)->release_resources) | |
7eb2a8a1 | 397 | UNIT_VTABLE(u)->release_resources(u); |
a354329f | 398 | |
f5869324 | 399 | if (u->perpetual) |
f2f725e5 | 400 | return false; |
9d576438 | 401 | |
05a98afd | 402 | if (sd_bus_track_count(u->bus_track) > 0) |
f2f725e5 | 403 | return false; |
05a98afd | 404 | |
5afe510c LP |
405 | /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */ |
406 | switch (u->collect_mode) { | |
407 | ||
408 | case COLLECT_INACTIVE: | |
409 | if (state != UNIT_INACTIVE) | |
f2f725e5 | 410 | return false; |
5afe510c LP |
411 | |
412 | break; | |
413 | ||
414 | case COLLECT_INACTIVE_OR_FAILED: | |
415 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
f2f725e5 | 416 | return false; |
5afe510c LP |
417 | |
418 | break; | |
419 | ||
420 | default: | |
421 | assert_not_reached("Unknown garbage collection mode"); | |
422 | } | |
423 | ||
e98b2fbb LP |
424 | if (u->cgroup_path) { |
425 | /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay | |
426 | * around. Units with active processes should never be collected. */ | |
427 | ||
428 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
429 | if (r < 0) | |
430 | log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", u->cgroup_path); | |
431 | if (r <= 0) | |
f2f725e5 | 432 | return false; |
e98b2fbb LP |
433 | } |
434 | ||
f2f725e5 ZJS |
435 | if (UNIT_VTABLE(u)->may_gc && !UNIT_VTABLE(u)->may_gc(u)) |
436 | return false; | |
701cc384 | 437 | |
f2f725e5 | 438 | return true; |
701cc384 LP |
439 | } |
440 | ||
87f0e418 LP |
441 | void unit_add_to_load_queue(Unit *u) { |
442 | assert(u); | |
ac155bb8 | 443 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 444 | |
ac155bb8 | 445 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
446 | return; |
447 | ||
71fda00f | 448 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 449 | u->in_load_queue = true; |
87f0e418 LP |
450 | } |
451 | ||
23a177ef LP |
452 | void unit_add_to_cleanup_queue(Unit *u) { |
453 | assert(u); | |
454 | ||
ac155bb8 | 455 | if (u->in_cleanup_queue) |
23a177ef LP |
456 | return; |
457 | ||
71fda00f | 458 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 459 | u->in_cleanup_queue = true; |
23a177ef LP |
460 | } |
461 | ||
701cc384 LP |
462 | void unit_add_to_gc_queue(Unit *u) { |
463 | assert(u); | |
464 | ||
ac155bb8 | 465 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
466 | return; |
467 | ||
f2f725e5 | 468 | if (!unit_may_gc(u)) |
701cc384 LP |
469 | return; |
470 | ||
c5a97ed1 | 471 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 472 | u->in_gc_queue = true; |
701cc384 LP |
473 | } |
474 | ||
c1e1601e LP |
475 | void unit_add_to_dbus_queue(Unit *u) { |
476 | assert(u); | |
ac155bb8 | 477 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 478 | |
ac155bb8 | 479 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
480 | return; |
481 | ||
a567261a | 482 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 483 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 484 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 485 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 486 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
487 | return; |
488 | } | |
489 | ||
71fda00f | 490 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 491 | u->in_dbus_queue = true; |
c1e1601e LP |
492 | } |
493 | ||
fda09318 | 494 | void unit_submit_to_stop_when_unneeded_queue(Unit *u) { |
a3c1168a LP |
495 | assert(u); |
496 | ||
497 | if (u->in_stop_when_unneeded_queue) | |
498 | return; | |
499 | ||
500 | if (!u->stop_when_unneeded) | |
501 | return; | |
502 | ||
503 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
504 | return; | |
505 | ||
506 | LIST_PREPEND(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
507 | u->in_stop_when_unneeded_queue = true; | |
508 | } | |
509 | ||
0bc488c9 LP |
510 | void unit_submit_to_start_when_upheld_queue(Unit *u) { |
511 | assert(u); | |
512 | ||
513 | if (u->in_start_when_upheld_queue) | |
514 | return; | |
515 | ||
516 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u))) | |
517 | return; | |
518 | ||
519 | if (!unit_has_dependency(u, UNIT_ATOM_START_STEADILY, NULL)) | |
520 | return; | |
521 | ||
522 | LIST_PREPEND(start_when_upheld_queue, u->manager->start_when_upheld_queue, u); | |
523 | u->in_start_when_upheld_queue = true; | |
524 | } | |
525 | ||
56c59592 LP |
526 | void unit_submit_to_stop_when_bound_queue(Unit *u) { |
527 | assert(u); | |
528 | ||
529 | if (u->in_stop_when_bound_queue) | |
530 | return; | |
531 | ||
532 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
533 | return; | |
534 | ||
535 | if (!unit_has_dependency(u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT, NULL)) | |
536 | return; | |
537 | ||
538 | LIST_PREPEND(stop_when_bound_queue, u->manager->stop_when_bound_queue, u); | |
539 | u->in_stop_when_bound_queue = true; | |
540 | } | |
541 | ||
15ed3c3a | 542 | static void unit_clear_dependencies(Unit *u) { |
87f0e418 LP |
543 | assert(u); |
544 | ||
15ed3c3a LP |
545 | /* Removes all dependencies configured on u and their reverse dependencies. */ |
546 | ||
547 | for (Hashmap *deps; (deps = hashmap_steal_first(u->dependencies));) { | |
87f0e418 | 548 | |
15ed3c3a LP |
549 | for (Unit *other; (other = hashmap_steal_first_key(deps));) { |
550 | Hashmap *other_deps; | |
701cc384 | 551 | |
15ed3c3a LP |
552 | HASHMAP_FOREACH(other_deps, other->dependencies) |
553 | hashmap_remove(other_deps, u); | |
554 | ||
555 | unit_add_to_gc_queue(other); | |
556 | } | |
557 | ||
558 | hashmap_free(deps); | |
87f0e418 LP |
559 | } |
560 | ||
15ed3c3a | 561 | u->dependencies = hashmap_free(u->dependencies); |
87f0e418 LP |
562 | } |
563 | ||
c2756a68 LP |
564 | static void unit_remove_transient(Unit *u) { |
565 | char **i; | |
566 | ||
567 | assert(u); | |
568 | ||
569 | if (!u->transient) | |
570 | return; | |
571 | ||
572 | if (u->fragment_path) | |
3f5e8115 | 573 | (void) unlink(u->fragment_path); |
c2756a68 LP |
574 | |
575 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 576 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 577 | |
39591351 LP |
578 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
579 | if (!p) | |
580 | continue; | |
581 | ||
582 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
583 | if (!pp) | |
584 | continue; | |
585 | ||
586 | /* Only drop transient drop-ins */ | |
587 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
588 | continue; | |
c2756a68 | 589 | |
39591351 LP |
590 | (void) unlink(*i); |
591 | (void) rmdir(p); | |
c2756a68 LP |
592 | } |
593 | } | |
594 | ||
a57f7e2c | 595 | static void unit_free_requires_mounts_for(Unit *u) { |
eef85c4a | 596 | assert(u); |
a57f7e2c | 597 | |
eef85c4a | 598 | for (;;) { |
c2b2df60 | 599 | _cleanup_free_ char *path = NULL; |
a57f7e2c | 600 | |
eef85c4a LP |
601 | path = hashmap_steal_first_key(u->requires_mounts_for); |
602 | if (!path) | |
603 | break; | |
604 | else { | |
605 | char s[strlen(path) + 1]; | |
a57f7e2c | 606 | |
eef85c4a LP |
607 | PATH_FOREACH_PREFIX_MORE(s, path) { |
608 | char *y; | |
609 | Set *x; | |
610 | ||
611 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
612 | if (!x) | |
613 | continue; | |
a57f7e2c | 614 | |
eef85c4a | 615 | (void) set_remove(x, u); |
a57f7e2c | 616 | |
eef85c4a LP |
617 | if (set_isempty(x)) { |
618 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
619 | free(y); | |
620 | set_free(x); | |
621 | } | |
a57f7e2c LP |
622 | } |
623 | } | |
624 | } | |
625 | ||
eef85c4a | 626 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
a57f7e2c LP |
627 | } |
628 | ||
598459ce LP |
629 | static void unit_done(Unit *u) { |
630 | ExecContext *ec; | |
631 | CGroupContext *cc; | |
632 | ||
633 | assert(u); | |
634 | ||
635 | if (u->type < 0) | |
636 | return; | |
637 | ||
638 | if (UNIT_VTABLE(u)->done) | |
639 | UNIT_VTABLE(u)->done(u); | |
640 | ||
641 | ec = unit_get_exec_context(u); | |
642 | if (ec) | |
643 | exec_context_done(ec); | |
644 | ||
645 | cc = unit_get_cgroup_context(u); | |
646 | if (cc) | |
647 | cgroup_context_done(cc); | |
648 | } | |
649 | ||
75db809a | 650 | Unit* unit_free(Unit *u) { |
12f64221 | 651 | Unit *slice; |
87f0e418 LP |
652 | char *t; |
653 | ||
c9d5c9c0 | 654 | if (!u) |
75db809a | 655 | return NULL; |
87f0e418 | 656 | |
50fb00b7 | 657 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 658 | |
2c289ea8 | 659 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
660 | unit_remove_transient(u); |
661 | ||
c1e1601e LP |
662 | bus_unit_send_removed_signal(u); |
663 | ||
598459ce | 664 | unit_done(u); |
a013b84b | 665 | |
50be4f4a | 666 | unit_dequeue_rewatch_pids(u); |
cf9fd508 | 667 | |
50be4f4a | 668 | sd_bus_slot_unref(u->match_bus_slot); |
05a98afd LP |
669 | sd_bus_track_unref(u->bus_track); |
670 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
d9e45bc3 | 671 | u->pending_freezer_message = sd_bus_message_unref(u->pending_freezer_message); |
05a98afd | 672 | |
a57f7e2c LP |
673 | unit_free_requires_mounts_for(u); |
674 | ||
90e74a66 | 675 | SET_FOREACH(t, u->aliases) |
ac155bb8 | 676 | hashmap_remove_value(u->manager->units, t, u); |
4562c355 ZJS |
677 | if (u->id) |
678 | hashmap_remove_value(u->manager->units, u->id, u); | |
87f0e418 | 679 | |
4b58153d LP |
680 | if (!sd_id128_is_null(u->invocation_id)) |
681 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
682 | ||
97e7d748 MS |
683 | if (u->job) { |
684 | Job *j = u->job; | |
685 | job_uninstall(j); | |
686 | job_free(j); | |
687 | } | |
964e0949 | 688 | |
e0209d83 MS |
689 | if (u->nop_job) { |
690 | Job *j = u->nop_job; | |
691 | job_uninstall(j); | |
692 | job_free(j); | |
693 | } | |
694 | ||
4c591f39 MK |
695 | /* A unit is being dropped from the tree, make sure our family is realized properly. Do this after we |
696 | * detach the unit from slice tree in order to eliminate its effect on controller masks. */ | |
12f64221 | 697 | slice = UNIT_GET_SLICE(u); |
d219a2b0 | 698 | unit_clear_dependencies(u); |
12f64221 LP |
699 | if (slice) |
700 | unit_add_family_to_cgroup_realize_queue(slice); | |
fb46fca7 | 701 | |
adefcf28 LP |
702 | if (u->on_console) |
703 | manager_unref_console(u->manager); | |
704 | ||
3d027d4d JK |
705 | |
706 | fdset_free(u->initial_socket_bind_link_fds); | |
91ce91c7 JK |
707 | #if BPF_FRAMEWORK |
708 | bpf_link_free(u->ipv4_socket_bind_link); | |
709 | bpf_link_free(u->ipv6_socket_bind_link); | |
710 | #endif | |
711 | ||
efdb0237 | 712 | unit_release_cgroup(u); |
72673e86 | 713 | |
d3070fbd LP |
714 | if (!MANAGER_IS_RELOADING(u->manager)) |
715 | unit_unlink_state_files(u); | |
716 | ||
00d9ef85 LP |
717 | unit_unref_uid_gid(u, false); |
718 | ||
5269eb6b | 719 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 720 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 721 | |
a911bb9a LP |
722 | unit_unwatch_all_pids(u); |
723 | ||
7f7d01ed ZJS |
724 | while (u->refs_by_target) |
725 | unit_ref_unset(u->refs_by_target); | |
57020a3a | 726 | |
ac155bb8 | 727 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 728 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 729 | |
ac155bb8 | 730 | if (u->in_load_queue) |
71fda00f | 731 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 732 | |
ac155bb8 | 733 | if (u->in_dbus_queue) |
71fda00f | 734 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 735 | |
a2d72e26 | 736 | if (u->in_gc_queue) |
c5a97ed1 | 737 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 738 | |
91a6073e LP |
739 | if (u->in_cgroup_realize_queue) |
740 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 741 | |
09e24654 LP |
742 | if (u->in_cgroup_empty_queue) |
743 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
744 | ||
1bdf2790 ZJS |
745 | if (u->in_cleanup_queue) |
746 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
adefcf28 | 747 | |
19496554 MS |
748 | if (u->in_target_deps_queue) |
749 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
750 | ||
a3c1168a LP |
751 | if (u->in_stop_when_unneeded_queue) |
752 | LIST_REMOVE(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
753 | ||
0bc488c9 LP |
754 | if (u->in_start_when_upheld_queue) |
755 | LIST_REMOVE(start_when_upheld_queue, u->manager->start_when_upheld_queue, u); | |
756 | ||
56c59592 LP |
757 | if (u->in_stop_when_bound_queue) |
758 | LIST_REMOVE(stop_when_bound_queue, u->manager->stop_when_bound_queue, u); | |
759 | ||
0fd9c28c | 760 | bpf_firewall_close(u); |
fab34748 | 761 | |
5f8ba20d JK |
762 | hashmap_free(u->bpf_foreign_by_key); |
763 | ||
084c7007 RG |
764 | bpf_program_unref(u->bpf_device_control_installed); |
765 | ||
a946fa9b ZJS |
766 | condition_free_list(u->conditions); |
767 | condition_free_list(u->asserts); | |
f755e3b7 | 768 | |
ac155bb8 | 769 | free(u->description); |
49dbfa7b | 770 | strv_free(u->documentation); |
ac155bb8 | 771 | free(u->fragment_path); |
1b64d026 | 772 | free(u->source_path); |
ae7a7182 | 773 | strv_free(u->dropin_paths); |
ac155bb8 | 774 | free(u->instance); |
87f0e418 | 775 | |
f189ab18 | 776 | free(u->job_timeout_reboot_arg); |
6bf0f408 LP |
777 | free(u->reboot_arg); |
778 | ||
4562c355 ZJS |
779 | set_free_free(u->aliases); |
780 | free(u->id); | |
781 | ||
75db809a | 782 | return mfree(u); |
87f0e418 LP |
783 | } |
784 | ||
d9e45bc3 MS |
785 | FreezerState unit_freezer_state(Unit *u) { |
786 | assert(u); | |
787 | ||
788 | return u->freezer_state; | |
789 | } | |
790 | ||
791 | int unit_freezer_state_kernel(Unit *u, FreezerState *ret) { | |
792 | char *values[1] = {}; | |
793 | int r; | |
794 | ||
795 | assert(u); | |
796 | ||
797 | r = cg_get_keyed_attribute(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "cgroup.events", | |
798 | STRV_MAKE("frozen"), values); | |
799 | if (r < 0) | |
800 | return r; | |
801 | ||
802 | r = _FREEZER_STATE_INVALID; | |
803 | ||
804 | if (values[0]) { | |
805 | if (streq(values[0], "0")) | |
806 | r = FREEZER_RUNNING; | |
807 | else if (streq(values[0], "1")) | |
808 | r = FREEZER_FROZEN; | |
809 | } | |
810 | ||
811 | free(values[0]); | |
812 | *ret = r; | |
813 | ||
814 | return 0; | |
815 | } | |
816 | ||
87f0e418 LP |
817 | UnitActiveState unit_active_state(Unit *u) { |
818 | assert(u); | |
819 | ||
ac155bb8 | 820 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
821 | return unit_active_state(unit_follow_merge(u)); |
822 | ||
823 | /* After a reload it might happen that a unit is not correctly | |
824 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 825 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
826 | |
827 | return UNIT_VTABLE(u)->active_state(u); | |
828 | } | |
829 | ||
10a94420 LP |
830 | const char* unit_sub_state_to_string(Unit *u) { |
831 | assert(u); | |
832 | ||
833 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
834 | } | |
835 | ||
15ed3c3a | 836 | static int unit_merge_names(Unit *u, Unit *other) { |
4562c355 | 837 | char *name; |
7c0b05e5 | 838 | int r; |
87f0e418 | 839 | |
23a177ef LP |
840 | assert(u); |
841 | assert(other); | |
842 | ||
4562c355 | 843 | r = unit_add_alias(u, other->id); |
7c0b05e5 MS |
844 | if (r < 0) |
845 | return r; | |
23a177ef | 846 | |
4562c355 ZJS |
847 | r = set_move(u->aliases, other->aliases); |
848 | if (r < 0) { | |
849 | set_remove(u->aliases, other->id); | |
850 | return r; | |
851 | } | |
23a177ef | 852 | |
4562c355 ZJS |
853 | TAKE_PTR(other->id); |
854 | other->aliases = set_free_free(other->aliases); | |
23a177ef | 855 | |
90e74a66 | 856 | SET_FOREACH(name, u->aliases) |
4562c355 | 857 | assert_se(hashmap_replace(u->manager->units, name, u) == 0); |
7c0b05e5 MS |
858 | |
859 | return 0; | |
87f0e418 LP |
860 | } |
861 | ||
15ed3c3a LP |
862 | static int unit_reserve_dependencies(Unit *u, Unit *other) { |
863 | size_t n_reserve; | |
864 | Hashmap* deps; | |
865 | void *d; | |
866 | int r; | |
09a65f92 MS |
867 | |
868 | assert(u); | |
869 | assert(other); | |
09a65f92 | 870 | |
15ed3c3a LP |
871 | /* Let's reserve some space in the dependency hashmaps so that later on merging the units cannot |
872 | * fail. | |
873 | * | |
874 | * First make some room in the per dependency type hashmaps. Using the summed size of both unit's | |
875 | * hashmaps is an estimate that is likely too high since they probably use some of the same | |
876 | * types. But it's never too low, and that's all we need. */ | |
877 | ||
878 | n_reserve = MIN(hashmap_size(other->dependencies), LESS_BY((size_t) _UNIT_DEPENDENCY_MAX, hashmap_size(u->dependencies))); | |
879 | if (n_reserve > 0) { | |
880 | r = hashmap_ensure_allocated(&u->dependencies, NULL); | |
881 | if (r < 0) | |
882 | return r; | |
883 | ||
884 | r = hashmap_reserve(u->dependencies, n_reserve); | |
885 | if (r < 0) | |
886 | return r; | |
887 | } | |
888 | ||
889 | /* Now, enlarge our per dependency type hashmaps by the number of entries in the same hashmap of the | |
890 | * other unit's dependencies. | |
891 | * | |
892 | * NB: If u does not have a dependency set allocated for some dependency type, there is no need to | |
893 | * reserve anything for. In that case other's set will be transferred as a whole to u by | |
894 | * complete_move(). */ | |
895 | ||
896 | HASHMAP_FOREACH_KEY(deps, d, u->dependencies) { | |
897 | Hashmap *other_deps; | |
898 | ||
899 | other_deps = hashmap_get(other->dependencies, d); | |
900 | ||
901 | r = hashmap_reserve(deps, hashmap_size(other_deps)); | |
902 | if (r < 0) | |
903 | return r; | |
904 | } | |
905 | ||
906 | return 0; | |
907 | } | |
908 | ||
909 | static void unit_maybe_warn_about_dependency( | |
910 | Unit *u, | |
911 | const char *other_id, | |
912 | UnitDependency dependency) { | |
913 | ||
914 | assert(u); | |
915 | ||
916 | /* Only warn about some unit types */ | |
917 | if (!IN_SET(dependency, | |
918 | UNIT_CONFLICTS, | |
919 | UNIT_CONFLICTED_BY, | |
920 | UNIT_BEFORE, | |
921 | UNIT_AFTER, | |
294446dc | 922 | UNIT_ON_SUCCESS, |
15ed3c3a LP |
923 | UNIT_ON_FAILURE, |
924 | UNIT_TRIGGERS, | |
925 | UNIT_TRIGGERED_BY)) | |
926 | return; | |
927 | ||
928 | if (streq_ptr(u->id, other_id)) | |
929 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
930 | else | |
931 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other_id), u->id); | |
932 | } | |
933 | ||
934 | static int unit_per_dependency_type_hashmap_update( | |
935 | Hashmap *per_type, | |
936 | Unit *other, | |
937 | UnitDependencyMask origin_mask, | |
938 | UnitDependencyMask destination_mask) { | |
939 | ||
940 | UnitDependencyInfo info; | |
941 | int r; | |
942 | ||
943 | assert(other); | |
944 | assert_cc(sizeof(void*) == sizeof(info)); | |
945 | ||
946 | /* Acquire the UnitDependencyInfo entry for the Unit* we are interested in, and update it if it | |
947 | * exists, or insert it anew if not. */ | |
09a65f92 | 948 | |
15ed3c3a LP |
949 | info.data = hashmap_get(per_type, other); |
950 | if (info.data) { | |
951 | /* Entry already exists. Add in our mask. */ | |
952 | ||
953 | if (FLAGS_SET(origin_mask, info.origin_mask) && | |
954 | FLAGS_SET(destination_mask, info.destination_mask)) | |
955 | return 0; /* NOP */ | |
956 | ||
957 | info.origin_mask |= origin_mask; | |
958 | info.destination_mask |= destination_mask; | |
959 | ||
960 | r = hashmap_update(per_type, other, info.data); | |
961 | } else { | |
962 | info = (UnitDependencyInfo) { | |
963 | .origin_mask = origin_mask, | |
964 | .destination_mask = destination_mask, | |
965 | }; | |
09a65f92 | 966 | |
15ed3c3a LP |
967 | r = hashmap_put(per_type, other, info.data); |
968 | } | |
969 | if (r < 0) | |
970 | return r; | |
971 | ||
972 | ||
973 | return 1; | |
09a65f92 MS |
974 | } |
975 | ||
15ed3c3a LP |
976 | static int unit_add_dependency_hashmap( |
977 | Hashmap **dependencies, | |
978 | UnitDependency d, | |
979 | Unit *other, | |
980 | UnitDependencyMask origin_mask, | |
981 | UnitDependencyMask destination_mask) { | |
982 | ||
983 | Hashmap *per_type; | |
87f0e418 | 984 | int r; |
23a177ef | 985 | |
15ed3c3a LP |
986 | assert(dependencies); |
987 | assert(other); | |
988 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
989 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
990 | assert(origin_mask > 0 || destination_mask > 0); | |
991 | ||
992 | /* Ensure the top-level dependency hashmap exists that maps UnitDependency → Hashmap(Unit* → | |
993 | * UnitDependencyInfo) */ | |
994 | r = hashmap_ensure_allocated(dependencies, NULL); | |
995 | if (r < 0) | |
996 | return r; | |
997 | ||
998 | /* Acquire the inner hashmap, that maps Unit* → UnitDependencyInfo, for the specified dependency | |
999 | * type, and if it's missing allocate it and insert it. */ | |
1000 | per_type = hashmap_get(*dependencies, UNIT_DEPENDENCY_TO_PTR(d)); | |
1001 | if (!per_type) { | |
1002 | per_type = hashmap_new(NULL); | |
1003 | if (!per_type) | |
1004 | return -ENOMEM; | |
1005 | ||
1006 | r = hashmap_put(*dependencies, UNIT_DEPENDENCY_TO_PTR(d), per_type); | |
1007 | if (r < 0) { | |
1008 | hashmap_free(per_type); | |
1009 | return r; | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | return unit_per_dependency_type_hashmap_update(per_type, other, origin_mask, destination_mask); | |
1014 | } | |
1015 | ||
1016 | static void unit_merge_dependencies( | |
1017 | Unit *u, | |
1018 | Unit *other) { | |
1019 | ||
1020 | int r; | |
eef85c4a | 1021 | |
23a177ef LP |
1022 | assert(u); |
1023 | assert(other); | |
23a177ef | 1024 | |
15ed3c3a LP |
1025 | if (u == other) |
1026 | return; | |
1027 | ||
1028 | for (;;) { | |
1029 | _cleanup_(hashmap_freep) Hashmap *other_deps = NULL; | |
1030 | UnitDependencyInfo di_back; | |
1031 | Unit *back; | |
1032 | void *dt; /* Actually of type UnitDependency, except that we don't bother casting it here, | |
1033 | * since the hashmaps all want it as void pointer. */ | |
1034 | ||
1035 | /* Let's focus on one dependency type at a time, that 'other' has defined. */ | |
1036 | other_deps = hashmap_steal_first_key_and_value(other->dependencies, &dt); | |
1037 | if (!other_deps) | |
1038 | break; /* done! */ | |
1039 | ||
1040 | /* Now iterate through all dependencies of this dependency type, of 'other'. We refer to the | |
1041 | * referenced units as 'back'. */ | |
1042 | HASHMAP_FOREACH_KEY(di_back.data, back, other_deps) { | |
1043 | Hashmap *back_deps; | |
1044 | void *back_dt; | |
eef85c4a | 1045 | |
e66047ff | 1046 | if (back == u) { |
15ed3c3a LP |
1047 | /* This is a dependency pointing back to the unit we want to merge with? |
1048 | * Suppress it (but warn) */ | |
1049 | unit_maybe_warn_about_dependency(u, other->id, UNIT_DEPENDENCY_FROM_PTR(dt)); | |
1050 | continue; | |
1051 | } | |
eef85c4a | 1052 | |
15ed3c3a LP |
1053 | /* Now iterate through all deps of 'back', and fix the ones pointing to 'other' to |
1054 | * point to 'u' instead. */ | |
1055 | HASHMAP_FOREACH_KEY(back_deps, back_dt, back->dependencies) { | |
1056 | UnitDependencyInfo di_move; | |
eef85c4a | 1057 | |
15ed3c3a LP |
1058 | di_move.data = hashmap_remove(back_deps, other); |
1059 | if (!di_move.data) | |
1060 | continue; | |
eef85c4a | 1061 | |
15ed3c3a LP |
1062 | assert_se(unit_per_dependency_type_hashmap_update( |
1063 | back_deps, | |
1064 | u, | |
1065 | di_move.origin_mask, | |
1066 | di_move.destination_mask) >= 0); | |
1067 | } | |
1068 | } | |
eef85c4a | 1069 | |
15ed3c3a LP |
1070 | /* Now all references towards 'other' of the current type 'dt' are corrected to point to |
1071 | * 'u'. Lets's now move the deps of type 'dt' from 'other' to 'u'. First, let's try to move | |
1072 | * them per type wholesale. */ | |
1073 | r = hashmap_put(u->dependencies, dt, other_deps); | |
1074 | if (r == -EEXIST) { | |
1075 | Hashmap *deps; | |
eef85c4a | 1076 | |
15ed3c3a | 1077 | /* The target unit already has dependencies of this type, let's then merge this individually. */ |
eef85c4a | 1078 | |
15ed3c3a LP |
1079 | assert_se(deps = hashmap_get(u->dependencies, dt)); |
1080 | ||
1081 | for (;;) { | |
1082 | UnitDependencyInfo di_move; | |
1083 | ||
1084 | /* Get first dep */ | |
1085 | di_move.data = hashmap_steal_first_key_and_value(other_deps, (void**) &back); | |
1086 | if (!di_move.data) | |
1087 | break; /* done */ | |
1088 | if (back == u) { | |
1089 | /* Would point back to us, ignore */ | |
1090 | unit_maybe_warn_about_dependency(u, other->id, UNIT_DEPENDENCY_FROM_PTR(dt)); | |
1091 | continue; | |
1092 | } | |
23a177ef | 1093 | |
15ed3c3a LP |
1094 | assert_se(unit_per_dependency_type_hashmap_update(deps, back, di_move.origin_mask, di_move.destination_mask) >= 0); |
1095 | } | |
1096 | } else { | |
1097 | assert_se(r >= 0); | |
1098 | TAKE_PTR(other_deps); | |
e66047ff | 1099 | |
15ed3c3a LP |
1100 | if (hashmap_remove(other_deps, u)) |
1101 | unit_maybe_warn_about_dependency(u, other->id, UNIT_DEPENDENCY_FROM_PTR(dt)); | |
1102 | } | |
1103 | } | |
23a177ef | 1104 | |
15ed3c3a | 1105 | other->dependencies = hashmap_free(other->dependencies); |
23a177ef LP |
1106 | } |
1107 | ||
1108 | int unit_merge(Unit *u, Unit *other) { | |
09a65f92 | 1109 | int r; |
87f0e418 LP |
1110 | |
1111 | assert(u); | |
1112 | assert(other); | |
ac155bb8 MS |
1113 | assert(u->manager == other->manager); |
1114 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 1115 | |
cc916967 LP |
1116 | other = unit_follow_merge(other); |
1117 | ||
23a177ef LP |
1118 | if (other == u) |
1119 | return 0; | |
1120 | ||
ac155bb8 | 1121 | if (u->type != other->type) |
9e2f7c11 LP |
1122 | return -EINVAL; |
1123 | ||
8a993b61 | 1124 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
1125 | return -EEXIST; |
1126 | ||
ec2ce0c5 | 1127 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 1128 | return -EEXIST; |
87f0e418 | 1129 | |
d383acad ZJS |
1130 | if (!streq_ptr(u->instance, other->instance)) |
1131 | return -EINVAL; | |
1132 | ||
ac155bb8 | 1133 | if (other->job) |
819e213f LP |
1134 | return -EEXIST; |
1135 | ||
e0209d83 MS |
1136 | if (other->nop_job) |
1137 | return -EEXIST; | |
1138 | ||
fdf20a31 | 1139 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
1140 | return -EEXIST; |
1141 | ||
15ed3c3a LP |
1142 | /* Make reservations to ensure merge_dependencies() won't fail. We don't rollback reservations if we |
1143 | * fail. We don't have a way to undo reservations. A reservation is not a leak. */ | |
1144 | r = unit_reserve_dependencies(u, other); | |
1145 | if (r < 0) | |
1146 | return r; | |
09a65f92 | 1147 | |
87f0e418 | 1148 | /* Merge names */ |
15ed3c3a | 1149 | r = unit_merge_names(u, other); |
7c0b05e5 MS |
1150 | if (r < 0) |
1151 | return r; | |
87f0e418 | 1152 | |
57020a3a | 1153 | /* Redirect all references */ |
7f7d01ed ZJS |
1154 | while (other->refs_by_target) |
1155 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
57020a3a | 1156 | |
87f0e418 | 1157 | /* Merge dependencies */ |
15ed3c3a | 1158 | unit_merge_dependencies(u, other); |
87f0e418 | 1159 | |
ac155bb8 MS |
1160 | other->load_state = UNIT_MERGED; |
1161 | other->merged_into = u; | |
23a177ef | 1162 | |
3616a49c LP |
1163 | /* If there is still some data attached to the other node, we |
1164 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 1165 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
1166 | if (UNIT_VTABLE(other)->done) |
1167 | UNIT_VTABLE(other)->done(other); | |
1168 | ||
1169 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
1170 | unit_add_to_cleanup_queue(other); |
1171 | ||
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 1176 | _cleanup_free_ char *s = NULL; |
23a177ef | 1177 | Unit *other; |
9e2f7c11 | 1178 | int r; |
23a177ef | 1179 | |
e8630e69 ZJS |
1180 | /* Either add name to u, or if a unit with name already exists, merge it with u. |
1181 | * If name is a template, do the same for name@instance, where instance is u's instance. */ | |
1182 | ||
23a177ef LP |
1183 | assert(u); |
1184 | assert(name); | |
1185 | ||
7410616c | 1186 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 1187 | if (!u->instance) |
9e2f7c11 LP |
1188 | return -EINVAL; |
1189 | ||
7410616c LP |
1190 | r = unit_name_replace_instance(name, u->instance, &s); |
1191 | if (r < 0) | |
1192 | return r; | |
9e2f7c11 LP |
1193 | |
1194 | name = s; | |
1195 | } | |
1196 | ||
c2756a68 | 1197 | other = manager_get_unit(u->manager, name); |
7410616c LP |
1198 | if (other) |
1199 | return unit_merge(u, other); | |
23a177ef | 1200 | |
7410616c | 1201 | return unit_add_name(u, name); |
23a177ef LP |
1202 | } |
1203 | ||
1204 | Unit* unit_follow_merge(Unit *u) { | |
1205 | assert(u); | |
1206 | ||
ac155bb8 MS |
1207 | while (u->load_state == UNIT_MERGED) |
1208 | assert_se(u = u->merged_into); | |
23a177ef LP |
1209 | |
1210 | return u; | |
1211 | } | |
1212 | ||
1213 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
1214 | int r; | |
1215 | ||
1216 | assert(u); | |
1217 | assert(c); | |
1218 | ||
e1e74614 | 1219 | if (c->working_directory && !c->working_directory_missing_ok) { |
eef85c4a | 1220 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1221 | if (r < 0) |
1222 | return r; | |
1223 | } | |
1224 | ||
1225 | if (c->root_directory) { | |
eef85c4a | 1226 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1227 | if (r < 0) |
1228 | return r; | |
1229 | } | |
1230 | ||
915e6d16 | 1231 | if (c->root_image) { |
eef85c4a | 1232 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
1233 | if (r < 0) |
1234 | return r; | |
1235 | } | |
1236 | ||
12375b95 | 1237 | for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
1238 | if (!u->manager->prefix[dt]) |
1239 | continue; | |
1240 | ||
12375b95 | 1241 | char **dp; |
ada5e276 | 1242 | STRV_FOREACH(dp, c->directories[dt].paths) { |
c2b2df60 | 1243 | _cleanup_free_ char *p = NULL; |
ada5e276 | 1244 | |
657ee2d8 | 1245 | p = path_join(u->manager->prefix[dt], *dp); |
ada5e276 YW |
1246 | if (!p) |
1247 | return -ENOMEM; | |
1248 | ||
eef85c4a | 1249 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
1250 | if (r < 0) |
1251 | return r; | |
1252 | } | |
1253 | } | |
1254 | ||
463d0d15 | 1255 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
1256 | return 0; |
1257 | ||
f3b7a79b LP |
1258 | /* For the following three directory types we need write access, and /var/ is possibly on the root |
1259 | * fs. Hence order after systemd-remount-fs.service, to ensure things are writable. */ | |
1260 | if (!strv_isempty(c->directories[EXEC_DIRECTORY_STATE].paths) || | |
1261 | !strv_isempty(c->directories[EXEC_DIRECTORY_CACHE].paths) || | |
1262 | !strv_isempty(c->directories[EXEC_DIRECTORY_LOGS].paths)) { | |
1263 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, true, UNIT_DEPENDENCY_FILE); | |
1264 | if (r < 0) | |
1265 | return r; | |
1266 | } | |
1267 | ||
b46a529c | 1268 | if (c->private_tmp) { |
d71f0505 | 1269 | |
b2c7d1bb FB |
1270 | /* FIXME: for now we make a special case for /tmp and add a weak dependency on |
1271 | * tmp.mount so /tmp being masked is supported. However there's no reason to treat | |
1272 | * /tmp specifically and masking other mount units should be handled more | |
1273 | * gracefully too, see PR#16894. */ | |
1274 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "tmp.mount", true, UNIT_DEPENDENCY_FILE); | |
1275 | if (r < 0) | |
1276 | return r; | |
1277 | ||
1278 | r = unit_require_mounts_for(u, "/var/tmp", UNIT_DEPENDENCY_FILE); | |
1279 | if (r < 0) | |
1280 | return r; | |
b46a529c | 1281 | |
35d8c19a | 1282 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1283 | if (r < 0) |
1284 | return r; | |
1285 | } | |
1286 | ||
33b58dfb LP |
1287 | if (c->root_image) { |
1288 | /* We need to wait for /dev/loopX to appear when doing RootImage=, hence let's add an | |
1289 | * implicit dependency on udev */ | |
1290 | ||
1291 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_UDEVD_SERVICE, true, UNIT_DEPENDENCY_FILE); | |
1292 | if (r < 0) | |
1293 | return r; | |
1294 | } | |
1295 | ||
52c239d7 LB |
1296 | if (!IN_SET(c->std_output, |
1297 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1298 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
52c239d7 LB |
1299 | !IN_SET(c->std_error, |
1300 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1301 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
91dd5f7c | 1302 | !c->log_namespace) |
23a177ef LP |
1303 | return 0; |
1304 | ||
91dd5f7c LP |
1305 | /* If syslog or kernel logging is requested (or log namespacing is), make sure our own logging daemon |
1306 | * is run first. */ | |
1307 | ||
1308 | if (c->log_namespace) { | |
dc5437c7 | 1309 | _cleanup_free_ char *socket_unit = NULL, *varlink_socket_unit = NULL; |
23a177ef | 1310 | |
91dd5f7c LP |
1311 | r = unit_name_build_from_type("systemd-journald", c->log_namespace, UNIT_SOCKET, &socket_unit); |
1312 | if (r < 0) | |
1313 | return r; | |
1314 | ||
1315 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, socket_unit, true, UNIT_DEPENDENCY_FILE); | |
1316 | if (r < 0) | |
1317 | return r; | |
dc5437c7 LP |
1318 | |
1319 | r = unit_name_build_from_type("systemd-journald-varlink", c->log_namespace, UNIT_SOCKET, &varlink_socket_unit); | |
1320 | if (r < 0) | |
1321 | return r; | |
1322 | ||
1323 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, varlink_socket_unit, true, UNIT_DEPENDENCY_FILE); | |
1324 | if (r < 0) | |
1325 | return r; | |
91dd5f7c LP |
1326 | } else |
1327 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, true, UNIT_DEPENDENCY_FILE); | |
b46a529c LP |
1328 | if (r < 0) |
1329 | return r; | |
23a177ef | 1330 | |
87f0e418 LP |
1331 | return 0; |
1332 | } | |
1333 | ||
87f0e418 LP |
1334 | const char *unit_description(Unit *u) { |
1335 | assert(u); | |
1336 | ||
ac155bb8 MS |
1337 | if (u->description) |
1338 | return u->description; | |
87f0e418 | 1339 | |
ac155bb8 | 1340 | return strna(u->id); |
87f0e418 LP |
1341 | } |
1342 | ||
2a8f53c6 ZJS |
1343 | const char *unit_status_string(Unit *u) { |
1344 | assert(u); | |
1345 | ||
1346 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_NAME && u->id) | |
1347 | return u->id; | |
1348 | ||
1349 | return unit_description(u); | |
1350 | } | |
1351 | ||
87f0e418 | 1352 | /* Common implementation for multiple backends */ |
c3620770 | 1353 | int unit_load_fragment_and_dropin(Unit *u, bool fragment_required) { |
23a177ef LP |
1354 | int r; |
1355 | ||
1356 | assert(u); | |
23a177ef | 1357 | |
e48614c4 | 1358 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1359 | r = unit_load_fragment(u); |
1360 | if (r < 0) | |
23a177ef LP |
1361 | return r; |
1362 | ||
c3620770 ZJS |
1363 | if (u->load_state == UNIT_STUB) { |
1364 | if (fragment_required) | |
1365 | return -ENOENT; | |
1366 | ||
1367 | u->load_state = UNIT_LOADED; | |
1368 | } | |
23a177ef | 1369 | |
9e4ea9cc ZJS |
1370 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1371 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1372 | * been loaded and which not, at least without doing complicated book-keeping, | |
1373 | * so let's always reread all drop-ins. */ | |
c9e06956 ZJS |
1374 | r = unit_load_dropin(unit_follow_merge(u)); |
1375 | if (r < 0) | |
1376 | return r; | |
1377 | ||
1378 | if (u->source_path) { | |
1379 | struct stat st; | |
1380 | ||
1381 | if (stat(u->source_path, &st) >= 0) | |
1382 | u->source_mtime = timespec_load(&st.st_mtim); | |
1383 | else | |
1384 | u->source_mtime = 0; | |
1385 | } | |
1386 | ||
1387 | return 0; | |
23a177ef LP |
1388 | } |
1389 | ||
19496554 MS |
1390 | void unit_add_to_target_deps_queue(Unit *u) { |
1391 | Manager *m = u->manager; | |
1392 | ||
1393 | assert(u); | |
1394 | ||
1395 | if (u->in_target_deps_queue) | |
1396 | return; | |
1397 | ||
1398 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1399 | u->in_target_deps_queue = true; | |
1400 | } | |
1401 | ||
bba34eed | 1402 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1403 | assert(u); |
1404 | assert(target); | |
1405 | ||
ac155bb8 | 1406 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1407 | return 0; |
1408 | ||
35b8ca3a | 1409 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1410 | * that loop check below is reliable */ |
ac155bb8 MS |
1411 | if (u->load_state != UNIT_LOADED || |
1412 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1413 | return 0; |
1414 | ||
21256a2b LP |
1415 | /* If either side wants no automatic dependencies, then let's |
1416 | * skip this */ | |
ac155bb8 MS |
1417 | if (!u->default_dependencies || |
1418 | !target->default_dependencies) | |
21256a2b LP |
1419 | return 0; |
1420 | ||
98bc2000 | 1421 | /* Don't create loops */ |
15ed3c3a | 1422 | if (unit_has_dependency(target, UNIT_ATOM_BEFORE, u)) |
98bc2000 LP |
1423 | return 0; |
1424 | ||
eef85c4a | 1425 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1426 | } |
1427 | ||
e954c9cf | 1428 | static int unit_add_slice_dependencies(Unit *u) { |
12f64221 | 1429 | Unit *slice; |
e954c9cf | 1430 | assert(u); |
b81884e7 | 1431 | |
35b7ff80 | 1432 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1433 | return 0; |
1434 | ||
eef85c4a LP |
1435 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1436 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1437 | relationship). */ | |
f6173cb9 | 1438 | UnitDependencyMask mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; |
eef85c4a | 1439 | |
12f64221 LP |
1440 | slice = UNIT_GET_SLICE(u); |
1441 | if (slice) | |
1442 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, slice, true, mask); | |
e954c9cf | 1443 | |
8c8da0e0 | 1444 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1445 | return 0; |
1446 | ||
5a724170 | 1447 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, true, mask); |
98bc2000 LP |
1448 | } |
1449 | ||
e954c9cf | 1450 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1451 | UnitDependencyInfo di; |
1452 | const char *path; | |
9588bc32 LP |
1453 | int r; |
1454 | ||
1455 | assert(u); | |
1456 | ||
90e74a66 | 1457 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for) { |
eef85c4a | 1458 | char prefix[strlen(path) + 1]; |
9588bc32 | 1459 | |
eef85c4a | 1460 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1461 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1462 | Unit *m; |
1463 | ||
c7c89abb | 1464 | r = unit_name_from_path(prefix, ".mount", &p); |
598a6a84 LP |
1465 | if (IN_SET(r, -EINVAL, -ENAMETOOLONG)) |
1466 | continue; /* If the path cannot be converted to a mount unit name, then it's | |
4076ad9d | 1467 | * not manageable as a unit by systemd, and hence we don't need a |
598a6a84 | 1468 | * dependency on it. Let's thus silently ignore the issue. */ |
9588bc32 LP |
1469 | if (r < 0) |
1470 | return r; | |
c7c89abb FB |
1471 | |
1472 | m = manager_get_unit(u->manager, p); | |
1473 | if (!m) { | |
598a6a84 LP |
1474 | /* Make sure to load the mount unit if it exists. If so the dependencies on |
1475 | * this unit will be added later during the loading of the mount unit. */ | |
c7c89abb | 1476 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); |
9588bc32 | 1477 | continue; |
c7c89abb | 1478 | } |
9588bc32 LP |
1479 | if (m == u) |
1480 | continue; | |
1481 | ||
1482 | if (m->load_state != UNIT_LOADED) | |
1483 | continue; | |
1484 | ||
eef85c4a | 1485 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1486 | if (r < 0) |
1487 | return r; | |
1488 | ||
1489 | if (m->fragment_path) { | |
eef85c4a | 1490 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1491 | if (r < 0) |
1492 | return r; | |
1493 | } | |
1494 | } | |
1495 | } | |
1496 | ||
1497 | return 0; | |
1498 | } | |
1499 | ||
a2db0225 AZ |
1500 | static int unit_add_oomd_dependencies(Unit *u) { |
1501 | CGroupContext *c; | |
1502 | bool wants_oomd; | |
1503 | int r; | |
1504 | ||
1505 | assert(u); | |
1506 | ||
1507 | if (!u->default_dependencies) | |
1508 | return 0; | |
1509 | ||
1510 | c = unit_get_cgroup_context(u); | |
1511 | if (!c) | |
1512 | return 0; | |
1513 | ||
1514 | wants_oomd = (c->moom_swap == MANAGED_OOM_KILL || c->moom_mem_pressure == MANAGED_OOM_KILL); | |
1515 | if (!wants_oomd) | |
1516 | return 0; | |
1517 | ||
1518 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "systemd-oomd.service", true, UNIT_DEPENDENCY_FILE); | |
1519 | if (r < 0) | |
1520 | return r; | |
1521 | ||
1522 | return 0; | |
1523 | } | |
1524 | ||
95ae05c0 WC |
1525 | static int unit_add_startup_units(Unit *u) { |
1526 | CGroupContext *c; | |
95ae05c0 WC |
1527 | |
1528 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1529 | if (!c) |
1530 | return 0; | |
1531 | ||
d53d9474 | 1532 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1533 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1534 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1535 | return 0; |
1536 | ||
de7fef4b | 1537 | return set_ensure_put(&u->manager->startup_units, NULL, u); |
95ae05c0 WC |
1538 | } |
1539 | ||
294446dc LP |
1540 | static int unit_validate_on_failure_job_mode( |
1541 | Unit *u, | |
1542 | const char *job_mode_setting, | |
1543 | JobMode job_mode, | |
1544 | const char *dependency_name, | |
1545 | UnitDependencyAtom atom) { | |
1546 | ||
1547 | Unit *other, *found = NULL; | |
1548 | ||
1549 | if (job_mode != JOB_ISOLATE) | |
1550 | return 0; | |
1551 | ||
1552 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
1553 | if (!found) | |
1554 | found = other; | |
1555 | else if (found != other) | |
1556 | return log_unit_error_errno( | |
1557 | u, SYNTHETIC_ERRNO(ENOEXEC), | |
1558 | "More than one %s dependencies specified but %sisolate set. Refusing.", | |
1559 | dependency_name, job_mode_setting); | |
1560 | } | |
1561 | ||
1562 | return 0; | |
1563 | } | |
1564 | ||
87f0e418 LP |
1565 | int unit_load(Unit *u) { |
1566 | int r; | |
1567 | ||
1568 | assert(u); | |
1569 | ||
ac155bb8 | 1570 | if (u->in_load_queue) { |
71fda00f | 1571 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1572 | u->in_load_queue = false; |
87f0e418 LP |
1573 | } |
1574 | ||
ac155bb8 | 1575 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1576 | return -EINVAL; |
1577 | ||
ac155bb8 | 1578 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1579 | return 0; |
1580 | ||
4f4afc88 | 1581 | if (u->transient_file) { |
66fa4bdd LP |
1582 | /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup |
1583 | * is complete, hence let's synchronize the unit file we just wrote to disk. */ | |
1584 | ||
4f4afc88 LP |
1585 | r = fflush_and_check(u->transient_file); |
1586 | if (r < 0) | |
1587 | goto fail; | |
1588 | ||
50fb00b7 | 1589 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1590 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1591 | } |
1592 | ||
c3784a7d ZJS |
1593 | r = UNIT_VTABLE(u)->load(u); |
1594 | if (r < 0) | |
23a177ef | 1595 | goto fail; |
c3784a7d ZJS |
1596 | |
1597 | assert(u->load_state != UNIT_STUB); | |
23a177ef | 1598 | |
7c8fa05c | 1599 | if (u->load_state == UNIT_LOADED) { |
19496554 | 1600 | unit_add_to_target_deps_queue(u); |
e954c9cf LP |
1601 | |
1602 | r = unit_add_slice_dependencies(u); | |
1603 | if (r < 0) | |
1604 | goto fail; | |
c2756a68 | 1605 | |
e954c9cf | 1606 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1607 | if (r < 0) |
c2756a68 | 1608 | goto fail; |
7c8fa05c | 1609 | |
a2db0225 AZ |
1610 | r = unit_add_oomd_dependencies(u); |
1611 | if (r < 0) | |
1612 | goto fail; | |
1613 | ||
95ae05c0 WC |
1614 | r = unit_add_startup_units(u); |
1615 | if (r < 0) | |
1616 | goto fail; | |
1617 | ||
294446dc LP |
1618 | r = unit_validate_on_failure_job_mode(u, "OnSuccessJobMode=", u->on_success_job_mode, "OnSuccess=", UNIT_ATOM_ON_SUCCESS); |
1619 | if (r < 0) | |
1620 | goto fail; | |
15ed3c3a | 1621 | |
294446dc LP |
1622 | r = unit_validate_on_failure_job_mode(u, "OnFailureJobMode=", u->on_failure_job_mode, "OnFailure=", UNIT_ATOM_ON_FAILURE); |
1623 | if (r < 0) | |
1624 | goto fail; | |
bc432dc7 | 1625 | |
a2df3ea4 MK |
1626 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1627 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1628 | ||
5af88058 LP |
1629 | /* We finished loading, let's ensure our parents recalculate the members mask */ |
1630 | unit_invalidate_cgroup_members_masks(u); | |
f68319bb LP |
1631 | } |
1632 | ||
ac155bb8 | 1633 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1634 | |
1635 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1636 | unit_add_to_gc_queue(u); |
f561e8c6 | 1637 | (void) manager_varlink_send_managed_oom_update(u); |
87f0e418 | 1638 | |
87f0e418 LP |
1639 | return 0; |
1640 | ||
1641 | fail: | |
81be2388 ZJS |
1642 | /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code |
1643 | * should hence return ENOEXEC to ensure units are placed in this state after loading. */ | |
c4555ad8 LP |
1644 | |
1645 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : | |
1646 | r == -ENOEXEC ? UNIT_BAD_SETTING : | |
1647 | UNIT_ERROR; | |
ac155bb8 | 1648 | u->load_error = r; |
c4555ad8 | 1649 | |
c149d2b4 ZJS |
1650 | /* Record the timestamp on the cache, so that if the cache gets updated between now and the next time |
1651 | * an attempt is made to load this unit, we know we need to check again. */ | |
7233e91a | 1652 | if (u->load_state == UNIT_NOT_FOUND) |
c2911d48 | 1653 | u->fragment_not_found_timestamp_hash = u->manager->unit_cache_timestamp_hash; |
7233e91a | 1654 | |
c1e1601e | 1655 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1656 | unit_add_to_gc_queue(u); |
23a177ef | 1657 | |
c4555ad8 | 1658 | return log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
87f0e418 LP |
1659 | } |
1660 | ||
f9f88198 YW |
1661 | _printf_(7, 8) |
1662 | static int log_unit_internal(void *userdata, int level, int error, const char *file, int line, const char *func, const char *format, ...) { | |
1663 | Unit *u = userdata; | |
1664 | va_list ap; | |
1665 | int r; | |
49365733 | 1666 | |
c2503e35 RH |
1667 | if (u && !unit_log_level_test(u, level)) |
1668 | return -ERRNO_VALUE(error); | |
1669 | ||
f9f88198 YW |
1670 | va_start(ap, format); |
1671 | if (u) | |
1672 | r = log_object_internalv(level, error, file, line, func, | |
1673 | u->manager->unit_log_field, | |
1674 | u->id, | |
1675 | u->manager->invocation_log_field, | |
1676 | u->invocation_id_string, | |
1677 | format, ap); | |
1678 | else | |
1679 | r = log_internalv(level, error, file, line, func, format, ap); | |
1680 | va_end(ap); | |
49365733 | 1681 | |
f9f88198 | 1682 | return r; |
49365733 LP |
1683 | } |
1684 | ||
97a3f4ee | 1685 | static bool unit_test_condition(Unit *u) { |
a0b191b7 LP |
1686 | _cleanup_strv_free_ char **env = NULL; |
1687 | int r; | |
1688 | ||
90bbc946 LP |
1689 | assert(u); |
1690 | ||
ac155bb8 | 1691 | dual_timestamp_get(&u->condition_timestamp); |
90bbc946 | 1692 | |
a0b191b7 LP |
1693 | r = manager_get_effective_environment(u->manager, &env); |
1694 | if (r < 0) { | |
1695 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
1696 | u->condition_result = CONDITION_ERROR; | |
1697 | } else | |
1698 | u->condition_result = condition_test_list( | |
1699 | u->conditions, | |
1700 | env, | |
1701 | condition_type_to_string, | |
1702 | log_unit_internal, | |
1703 | u); | |
e18f8852 | 1704 | |
a0b191b7 | 1705 | unit_add_to_dbus_queue(u); |
ac155bb8 | 1706 | return u->condition_result; |
90bbc946 LP |
1707 | } |
1708 | ||
97a3f4ee | 1709 | static bool unit_test_assert(Unit *u) { |
a0b191b7 LP |
1710 | _cleanup_strv_free_ char **env = NULL; |
1711 | int r; | |
1712 | ||
59fccdc5 LP |
1713 | assert(u); |
1714 | ||
1715 | dual_timestamp_get(&u->assert_timestamp); | |
59fccdc5 | 1716 | |
a0b191b7 LP |
1717 | r = manager_get_effective_environment(u->manager, &env); |
1718 | if (r < 0) { | |
1719 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
1720 | u->assert_result = CONDITION_ERROR; | |
1721 | } else | |
1722 | u->assert_result = condition_test_list( | |
1723 | u->asserts, | |
1724 | env, | |
1725 | assert_type_to_string, | |
1726 | log_unit_internal, | |
1727 | u); | |
e18f8852 | 1728 | |
a0b191b7 | 1729 | unit_add_to_dbus_queue(u); |
59fccdc5 LP |
1730 | return u->assert_result; |
1731 | } | |
1732 | ||
5bcf34eb | 1733 | void unit_status_printf(Unit *u, StatusType status_type, const char *status, const char *unit_status_msg_format) { |
5b262f74 LP |
1734 | const char *d; |
1735 | ||
2a8f53c6 | 1736 | d = unit_status_string(u); |
5b262f74 LP |
1737 | if (log_get_show_color()) |
1738 | d = strjoina(ANSI_HIGHLIGHT, d, ANSI_NORMAL); | |
1739 | ||
df446f96 | 1740 | DISABLE_WARNING_FORMAT_NONLITERAL; |
5bcf34eb | 1741 | manager_status_printf(u->manager, status_type, status, unit_status_msg_format, d); |
df446f96 LP |
1742 | REENABLE_WARNING; |
1743 | } | |
1744 | ||
97a3f4ee | 1745 | int unit_test_start_limit(Unit *u) { |
429926e9 TR |
1746 | const char *reason; |
1747 | ||
6bf0f408 LP |
1748 | assert(u); |
1749 | ||
7bf081a1 | 1750 | if (ratelimit_below(&u->start_ratelimit)) { |
6bf0f408 LP |
1751 | u->start_limit_hit = false; |
1752 | return 0; | |
1753 | } | |
1754 | ||
1755 | log_unit_warning(u, "Start request repeated too quickly."); | |
1756 | u->start_limit_hit = true; | |
1757 | ||
429926e9 TR |
1758 | reason = strjoina("unit ", u->id, " failed"); |
1759 | ||
36c4dc08 LP |
1760 | emergency_action(u->manager, u->start_limit_action, |
1761 | EMERGENCY_ACTION_IS_WATCHDOG|EMERGENCY_ACTION_WARN, | |
1762 | u->reboot_arg, -1, reason); | |
1763 | ||
1764 | return -ECANCELED; | |
6bf0f408 LP |
1765 | } |
1766 | ||
c891efaf | 1767 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1768 | assert(u); |
c891efaf FB |
1769 | |
1770 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1771 | return false; | |
1772 | ||
1773 | /* For some reasons units remaining in the same process group | |
1774 | * as PID 1 fail to acquire the console even if it's not used | |
1775 | * by any process. So skip the confirmation question for them. */ | |
1776 | return !unit_get_exec_context(u)->same_pgrp; | |
1777 | } | |
1778 | ||
631b676b LP |
1779 | static bool unit_verify_deps(Unit *u) { |
1780 | Unit *other; | |
631b676b LP |
1781 | |
1782 | assert(u); | |
1783 | ||
defe63b0 LP |
1784 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined |
1785 | * with After=. We do not check Requires= or Requisite= here as they only should have an effect on | |
1786 | * the job processing, but do not have any effect afterwards. We don't check BindsTo= dependencies | |
1787 | * that are not used in conjunction with After= as for them any such check would make things entirely | |
1788 | * racy. */ | |
631b676b | 1789 | |
15ed3c3a | 1790 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { |
631b676b | 1791 | |
15ed3c3a | 1792 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other)) |
631b676b LP |
1793 | continue; |
1794 | ||
1795 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1796 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1797 | return false; | |
1798 | } | |
1799 | } | |
1800 | ||
1801 | return true; | |
1802 | } | |
1803 | ||
9adb6959 | 1804 | /* Errors that aren't really errors: |
6bf0f408 | 1805 | * -EALREADY: Unit is already started. |
9adb6959 | 1806 | * -ECOMM: Condition failed |
6bf0f408 | 1807 | * -EAGAIN: An operation is already in progress. Retry later. |
9adb6959 LP |
1808 | * |
1809 | * Errors that are real errors: | |
1810 | * -EBADR: This unit type does not support starting. | |
2de9b979 | 1811 | * -ECANCELED: Start limit hit, too many requests for now |
6bf0f408 LP |
1812 | * -EPROTO: Assert failed |
1813 | * -EINVAL: Unit not loaded | |
1814 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1815 | * -ENOLINK: The necessary dependencies are not fulfilled. |
d4fd1cf2 | 1816 | * -ESTALE: This unit has been started before and can't be started a second time |
a4191c9f | 1817 | * -ENOENT: This is a triggering unit and unit to trigger is not loaded |
87f0e418 LP |
1818 | */ |
1819 | int unit_start(Unit *u) { | |
1820 | UnitActiveState state; | |
92ab323c | 1821 | Unit *following; |
87f0e418 LP |
1822 | |
1823 | assert(u); | |
1824 | ||
5766aca8 LP |
1825 | /* If this is already started, then this will succeed. Note that this will even succeed if this unit |
1826 | * is not startable by the user. This is relied on to detect when we need to wait for units and when | |
1827 | * waiting is finished. */ | |
87f0e418 LP |
1828 | state = unit_active_state(u); |
1829 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1830 | return -EALREADY; | |
380dc8b0 LP |
1831 | if (state == UNIT_MAINTENANCE) |
1832 | return -EAGAIN; | |
87f0e418 | 1833 | |
6bf0f408 LP |
1834 | /* Units that aren't loaded cannot be started */ |
1835 | if (u->load_state != UNIT_LOADED) | |
1836 | return -EINVAL; | |
1837 | ||
d4fd1cf2 LP |
1838 | /* Refuse starting scope units more than once */ |
1839 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1840 | return -ESTALE; | |
1841 | ||
5766aca8 LP |
1842 | /* If the conditions failed, don't do anything at all. If we already are activating this call might |
1843 | * still be useful to speed up activation in case there is some hold-off time, but we don't want to | |
1844 | * recheck the condition in that case. */ | |
a82e5507 | 1845 | if (state != UNIT_ACTIVATING && |
5af6aa58 | 1846 | !unit_test_condition(u)) |
5766aca8 | 1847 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(ECOMM), "Starting requested but condition failed. Not starting unit."); |
52661efd | 1848 | |
59fccdc5 LP |
1849 | /* If the asserts failed, fail the entire job */ |
1850 | if (state != UNIT_ACTIVATING && | |
5766aca8 LP |
1851 | !unit_test_assert(u)) |
1852 | return log_unit_notice_errno(u, SYNTHETIC_ERRNO(EPROTO), "Starting requested but asserts failed."); | |
59fccdc5 | 1853 | |
5766aca8 LP |
1854 | /* Units of types that aren't supported cannot be started. Note that we do this test only after the |
1855 | * condition checks, so that we rather return condition check errors (which are usually not | |
1856 | * considered a true failure) than "not supported" errors (which are considered a failure). | |
d11a7645 | 1857 | */ |
96cf3ec9 | 1858 | if (!unit_type_supported(u->type)) |
d11a7645 LP |
1859 | return -EOPNOTSUPP; |
1860 | ||
5766aca8 LP |
1861 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine |
1862 | * should have taken care of this already, but let's check this here again. After all, our | |
1863 | * dependencies might not be in effect anymore, due to a reload or due to a failed condition. */ | |
631b676b LP |
1864 | if (!unit_verify_deps(u)) |
1865 | return -ENOLINK; | |
1866 | ||
92ab323c | 1867 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1868 | following = unit_following(u); |
1869 | if (following) { | |
f2341e0a | 1870 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1871 | return unit_start(following); |
1872 | } | |
1873 | ||
1874 | /* If it is stopped, but we cannot start it, then fail */ | |
1875 | if (!UNIT_VTABLE(u)->start) | |
1876 | return -EBADR; | |
1877 | ||
5766aca8 LP |
1878 | /* We don't suppress calls to ->start() here when we are already starting, to allow this request to |
1879 | * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it | |
1880 | * waits for a holdoff timer to elapse before it will start again. */ | |
87f0e418 | 1881 | |
c1e1601e | 1882 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 1883 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 1884 | |
d1a34ae9 | 1885 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1886 | } |
1887 | ||
1888 | bool unit_can_start(Unit *u) { | |
1889 | assert(u); | |
1890 | ||
8ff4d2ab LP |
1891 | if (u->load_state != UNIT_LOADED) |
1892 | return false; | |
1893 | ||
96cf3ec9 | 1894 | if (!unit_type_supported(u->type)) |
8ff4d2ab LP |
1895 | return false; |
1896 | ||
d4fd1cf2 LP |
1897 | /* Scope units may be started only once */ |
1898 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
1899 | return false; | |
1900 | ||
87f0e418 LP |
1901 | return !!UNIT_VTABLE(u)->start; |
1902 | } | |
1903 | ||
2528a7a6 LP |
1904 | bool unit_can_isolate(Unit *u) { |
1905 | assert(u); | |
1906 | ||
1907 | return unit_can_start(u) && | |
ac155bb8 | 1908 | u->allow_isolate; |
2528a7a6 LP |
1909 | } |
1910 | ||
87f0e418 LP |
1911 | /* Errors: |
1912 | * -EBADR: This unit type does not support stopping. | |
1913 | * -EALREADY: Unit is already stopped. | |
1914 | * -EAGAIN: An operation is already in progress. Retry later. | |
1915 | */ | |
1916 | int unit_stop(Unit *u) { | |
1917 | UnitActiveState state; | |
92ab323c | 1918 | Unit *following; |
87f0e418 LP |
1919 | |
1920 | assert(u); | |
1921 | ||
87f0e418 | 1922 | state = unit_active_state(u); |
fdf20a31 | 1923 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1924 | return -EALREADY; |
1925 | ||
0faacd47 LP |
1926 | following = unit_following(u); |
1927 | if (following) { | |
f2341e0a | 1928 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1929 | return unit_stop(following); |
1930 | } | |
1931 | ||
7898b0cf LP |
1932 | if (!UNIT_VTABLE(u)->stop) |
1933 | return -EBADR; | |
1934 | ||
c1e1601e | 1935 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 1936 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 1937 | |
d1a34ae9 | 1938 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1939 | } |
1940 | ||
f5869324 LP |
1941 | bool unit_can_stop(Unit *u) { |
1942 | assert(u); | |
1943 | ||
39c79477 ZJS |
1944 | /* Note: if we return true here, it does not mean that the unit may be successfully stopped. |
1945 | * Extrinsic units follow external state and they may stop following external state changes | |
1946 | * (hence we return true here), but an attempt to do this through the manager will fail. */ | |
1947 | ||
96cf3ec9 | 1948 | if (!unit_type_supported(u->type)) |
f5869324 LP |
1949 | return false; |
1950 | ||
1951 | if (u->perpetual) | |
1952 | return false; | |
1953 | ||
1954 | return !!UNIT_VTABLE(u)->stop; | |
1955 | } | |
1956 | ||
87f0e418 LP |
1957 | /* Errors: |
1958 | * -EBADR: This unit type does not support reloading. | |
1959 | * -ENOEXEC: Unit is not started. | |
1960 | * -EAGAIN: An operation is already in progress. Retry later. | |
1961 | */ | |
1962 | int unit_reload(Unit *u) { | |
1963 | UnitActiveState state; | |
92ab323c | 1964 | Unit *following; |
87f0e418 LP |
1965 | |
1966 | assert(u); | |
1967 | ||
ac155bb8 | 1968 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1969 | return -EINVAL; |
1970 | ||
87f0e418 LP |
1971 | if (!unit_can_reload(u)) |
1972 | return -EBADR; | |
1973 | ||
1974 | state = unit_active_state(u); | |
e364ad06 | 1975 | if (state == UNIT_RELOADING) |
6255af75 | 1976 | return -EAGAIN; |
87f0e418 | 1977 | |
d85ff944 YW |
1978 | if (state != UNIT_ACTIVE) |
1979 | return log_unit_warning_errno(u, SYNTHETIC_ERRNO(ENOEXEC), "Unit cannot be reloaded because it is inactive."); | |
87f0e418 | 1980 | |
e48614c4 ZJS |
1981 | following = unit_following(u); |
1982 | if (following) { | |
f2341e0a | 1983 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1984 | return unit_reload(following); |
1985 | } | |
1986 | ||
c1e1601e | 1987 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1988 | |
f54bcca5 JR |
1989 | if (!UNIT_VTABLE(u)->reload) { |
1990 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
2ad2e41a | 1991 | unit_notify(u, unit_active_state(u), unit_active_state(u), 0); |
f54bcca5 JR |
1992 | return 0; |
1993 | } | |
1994 | ||
d9e45bc3 MS |
1995 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
1996 | ||
d1a34ae9 | 1997 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1998 | } |
1999 | ||
2000 | bool unit_can_reload(Unit *u) { | |
2001 | assert(u); | |
2002 | ||
f54bcca5 JR |
2003 | if (UNIT_VTABLE(u)->can_reload) |
2004 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 2005 | |
15ed3c3a | 2006 | if (unit_has_dependency(u, UNIT_ATOM_PROPAGATES_RELOAD_TO, NULL)) |
87f0e418 LP |
2007 | return true; |
2008 | ||
f54bcca5 | 2009 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
2010 | } |
2011 | ||
a3c1168a | 2012 | bool unit_is_unneeded(Unit *u) { |
15ed3c3a | 2013 | Unit *other; |
f3bff0eb LP |
2014 | assert(u); |
2015 | ||
ac155bb8 | 2016 | if (!u->stop_when_unneeded) |
a3c1168a | 2017 | return false; |
f3bff0eb | 2018 | |
a3c1168a | 2019 | /* Don't clean up while the unit is transitioning or is even inactive. */ |
116654d2 | 2020 | if (unit_active_state(u) != UNIT_ACTIVE) |
a3c1168a LP |
2021 | return false; |
2022 | if (u->job) | |
2023 | return false; | |
f3bff0eb | 2024 | |
15ed3c3a | 2025 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_PINS_STOP_WHEN_UNNEEDED) { |
fda09318 | 2026 | /* If a dependent unit has a job queued, is active or transitioning, or is marked for |
a3c1168a | 2027 | * restart, then don't clean this one up. */ |
b81884e7 | 2028 | |
15ed3c3a LP |
2029 | if (other->job) |
2030 | return false; | |
a3c1168a | 2031 | |
15ed3c3a LP |
2032 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
2033 | return false; | |
a3c1168a | 2034 | |
15ed3c3a LP |
2035 | if (unit_will_restart(other)) |
2036 | return false; | |
bea355da LP |
2037 | } |
2038 | ||
a3c1168a LP |
2039 | return true; |
2040 | } | |
f3bff0eb | 2041 | |
0bc488c9 LP |
2042 | bool unit_is_upheld_by_active(Unit *u, Unit **ret_culprit) { |
2043 | Unit *other; | |
2044 | ||
2045 | assert(u); | |
2046 | ||
2047 | /* Checks if the unit needs to be started because it currently is not running, but some other unit | |
2048 | * that is active declared an Uphold= dependencies on it */ | |
2049 | ||
2050 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) || u->job) { | |
2051 | if (ret_culprit) | |
2052 | *ret_culprit = NULL; | |
2053 | return false; | |
2054 | } | |
2055 | ||
2056 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_START_STEADILY) { | |
2057 | if (other->job) | |
2058 | continue; | |
2059 | ||
2060 | if (UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
2061 | if (ret_culprit) | |
2062 | *ret_culprit = other; | |
2063 | return true; | |
2064 | } | |
2065 | } | |
2066 | ||
2067 | if (ret_culprit) | |
2068 | *ret_culprit = NULL; | |
2069 | return false; | |
2070 | } | |
2071 | ||
56c59592 LP |
2072 | bool unit_is_bound_by_inactive(Unit *u, Unit **ret_culprit) { |
2073 | Unit *other; | |
2074 | ||
2075 | assert(u); | |
2076 | ||
2077 | /* Checks whether this unit is bound to another unit that is inactive, i.e. whether we should stop | |
7802194a | 2078 | * because the other unit is down. */ |
56c59592 LP |
2079 | |
2080 | if (unit_active_state(u) != UNIT_ACTIVE || u->job) { | |
2081 | /* Don't clean up while the unit is transitioning or is even inactive. */ | |
2082 | if (ret_culprit) | |
2083 | *ret_culprit = NULL; | |
2084 | return false; | |
2085 | } | |
2086 | ||
2087 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { | |
2088 | if (other->job) | |
2089 | continue; | |
2090 | ||
2091 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) { | |
2092 | if (*ret_culprit) | |
2093 | *ret_culprit = other; | |
2094 | ||
2095 | return true; | |
2096 | } | |
2097 | } | |
2098 | ||
2099 | if (ret_culprit) | |
2100 | *ret_culprit = NULL; | |
2101 | return false; | |
2102 | } | |
2103 | ||
a3c1168a | 2104 | static void check_unneeded_dependencies(Unit *u) { |
15ed3c3a | 2105 | Unit *other; |
a3c1168a LP |
2106 | assert(u); |
2107 | ||
2108 | /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */ | |
2109 | ||
15ed3c3a LP |
2110 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_STOP_WHEN_UNNEEDED_QUEUE) |
2111 | unit_submit_to_stop_when_unneeded_queue(other); | |
f3bff0eb LP |
2112 | } |
2113 | ||
0bc488c9 LP |
2114 | static void check_uphold_dependencies(Unit *u) { |
2115 | Unit *other; | |
2116 | assert(u); | |
2117 | ||
2118 | /* Add all units this unit depends on to the queue that processes Uphold= behaviour. */ | |
2119 | ||
2120 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_START_WHEN_UPHELD_QUEUE) | |
2121 | unit_submit_to_start_when_upheld_queue(other); | |
2122 | } | |
2123 | ||
56c59592 | 2124 | static void check_bound_by_dependencies(Unit *u) { |
ff502445 | 2125 | Unit *other; |
ff502445 LP |
2126 | assert(u); |
2127 | ||
56c59592 | 2128 | /* Add all units this unit depends on to the queue that processes BindsTo= stop behaviour. */ |
ff502445 | 2129 | |
56c59592 LP |
2130 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_CANNOT_BE_ACTIVE_WITHOUT_QUEUE) |
2131 | unit_submit_to_stop_when_bound_queue(other); | |
ff502445 LP |
2132 | } |
2133 | ||
87f0e418 | 2134 | static void retroactively_start_dependencies(Unit *u) { |
87f0e418 LP |
2135 | Unit *other; |
2136 | ||
2137 | assert(u); | |
2138 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2139 | ||
15ed3c3a LP |
2140 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_REPLACE) /* Requires= + BindsTo= */ |
2141 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
b81884e7 | 2142 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2143 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
b81884e7 | 2144 | |
15ed3c3a LP |
2145 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_FAIL) /* Wants= */ |
2146 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
b81884e7 | 2147 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2148 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL, NULL); |
87f0e418 | 2149 | |
15ed3c3a | 2150 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_START) /* Conflicts= (and inverse) */ |
b81884e7 | 2151 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2152 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
87f0e418 LP |
2153 | } |
2154 | ||
2155 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 LP |
2156 | Unit *other; |
2157 | ||
2158 | assert(u); | |
2159 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2160 | ||
b81884e7 | 2161 | /* Pull down units which are bound to us recursively if enabled */ |
15ed3c3a | 2162 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_STOP) /* BoundBy= */ |
b81884e7 | 2163 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2164 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
cd0504d0 MS |
2165 | } |
2166 | ||
294446dc LP |
2167 | void unit_start_on_failure( |
2168 | Unit *u, | |
2169 | const char *dependency_name, | |
2170 | UnitDependencyAtom atom, | |
2171 | JobMode job_mode) { | |
2172 | ||
15ed3c3a | 2173 | bool logged = false; |
c0daa706 | 2174 | Unit *other; |
7f66b026 | 2175 | int r; |
c0daa706 LP |
2176 | |
2177 | assert(u); | |
294446dc LP |
2178 | assert(dependency_name); |
2179 | assert(IN_SET(atom, UNIT_ATOM_ON_SUCCESS, UNIT_ATOM_ON_FAILURE)); | |
2180 | ||
2181 | /* Act on OnFailure= and OnSuccess= dependencies */ | |
c0daa706 | 2182 | |
294446dc | 2183 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { |
7f66b026 | 2184 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
222ae6a8 | 2185 | |
15ed3c3a | 2186 | if (!logged) { |
294446dc | 2187 | log_unit_info(u, "Triggering %s dependencies.", dependency_name); |
15ed3c3a LP |
2188 | logged = true; |
2189 | } | |
2190 | ||
294446dc | 2191 | r = manager_add_job(u->manager, JOB_START, other, job_mode, NULL, &error, NULL); |
c1b6628d | 2192 | if (r < 0) |
294446dc LP |
2193 | log_unit_warning_errno( |
2194 | u, r, "Failed to enqueue %s job, ignoring: %s", | |
2195 | dependency_name, bus_error_message(&error, r)); | |
222ae6a8 | 2196 | } |
294446dc LP |
2197 | |
2198 | if (logged) | |
2199 | log_unit_debug(u, "Triggering %s dependencies done.", dependency_name); | |
c0daa706 LP |
2200 | } |
2201 | ||
3ecaa09b LP |
2202 | void unit_trigger_notify(Unit *u) { |
2203 | Unit *other; | |
3ecaa09b LP |
2204 | |
2205 | assert(u); | |
2206 | ||
15ed3c3a | 2207 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_TRIGGERED_BY) |
3ecaa09b LP |
2208 | if (UNIT_VTABLE(other)->trigger_notify) |
2209 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2210 | } | |
2211 | ||
37109b85 ZJS |
2212 | static int raise_level(int log_level, bool condition_info, bool condition_notice) { |
2213 | if (condition_notice && log_level > LOG_NOTICE) | |
2214 | return LOG_NOTICE; | |
2215 | if (condition_info && log_level > LOG_INFO) | |
2216 | return LOG_INFO; | |
2217 | return log_level; | |
2218 | } | |
2219 | ||
915b1d01 | 2220 | static int unit_log_resources(Unit *u) { |
bc40a20e LP |
2221 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + _CGROUP_IO_ACCOUNTING_METRIC_MAX + 4]; |
2222 | bool any_traffic = false, have_ip_accounting = false, any_io = false, have_io_accounting = false; | |
2223 | _cleanup_free_ char *igress = NULL, *egress = NULL, *rr = NULL, *wr = NULL; | |
162392b7 | 2224 | int log_level = LOG_DEBUG; /* May be raised if resources consumed over a threshold */ |
915b1d01 | 2225 | size_t n_message_parts = 0, n_iovec = 0; |
bc40a20e | 2226 | char* message_parts[1 + 2 + 2 + 1], *t; |
915b1d01 | 2227 | nsec_t nsec = NSEC_INFINITY; |
915b1d01 LP |
2228 | int r; |
2229 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2230 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2231 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2232 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2233 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2234 | }; | |
bc40a20e LP |
2235 | const char* const io_fields[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
2236 | [CGROUP_IO_READ_BYTES] = "IO_METRIC_READ_BYTES", | |
2237 | [CGROUP_IO_WRITE_BYTES] = "IO_METRIC_WRITE_BYTES", | |
2238 | [CGROUP_IO_READ_OPERATIONS] = "IO_METRIC_READ_OPERATIONS", | |
2239 | [CGROUP_IO_WRITE_OPERATIONS] = "IO_METRIC_WRITE_OPERATIONS", | |
2240 | }; | |
915b1d01 LP |
2241 | |
2242 | assert(u); | |
2243 | ||
2244 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2245 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2246 | * information and the complete data in structured fields. */ | |
2247 | ||
2248 | (void) unit_get_cpu_usage(u, &nsec); | |
2249 | if (nsec != NSEC_INFINITY) { | |
2250 | char buf[FORMAT_TIMESPAN_MAX] = ""; | |
2251 | ||
2252 | /* Format the CPU time for inclusion in the structured log message */ | |
2253 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2254 | r = log_oom(); | |
2255 | goto finish; | |
2256 | } | |
2257 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2258 | ||
2259 | /* Format the CPU time for inclusion in the human language message string */ | |
2260 | format_timespan(buf, sizeof(buf), nsec / NSEC_PER_USEC, USEC_PER_MSEC); | |
ec9d636b | 2261 | t = strjoin("consumed ", buf, " CPU time"); |
915b1d01 LP |
2262 | if (!t) { |
2263 | r = log_oom(); | |
2264 | goto finish; | |
2265 | } | |
2266 | ||
2267 | message_parts[n_message_parts++] = t; | |
37109b85 ZJS |
2268 | |
2269 | log_level = raise_level(log_level, | |
2270 | nsec > NOTICEWORTHY_CPU_NSEC, | |
2271 | nsec > MENTIONWORTHY_CPU_NSEC); | |
915b1d01 LP |
2272 | } |
2273 | ||
bc40a20e LP |
2274 | for (CGroupIOAccountingMetric k = 0; k < _CGROUP_IO_ACCOUNTING_METRIC_MAX; k++) { |
2275 | char buf[FORMAT_BYTES_MAX] = ""; | |
2276 | uint64_t value = UINT64_MAX; | |
2277 | ||
2278 | assert(io_fields[k]); | |
2279 | ||
2280 | (void) unit_get_io_accounting(u, k, k > 0, &value); | |
2281 | if (value == UINT64_MAX) | |
2282 | continue; | |
2283 | ||
2284 | have_io_accounting = true; | |
2285 | if (value > 0) | |
2286 | any_io = true; | |
2287 | ||
2288 | /* Format IO accounting data for inclusion in the structured log message */ | |
2289 | if (asprintf(&t, "%s=%" PRIu64, io_fields[k], value) < 0) { | |
2290 | r = log_oom(); | |
2291 | goto finish; | |
2292 | } | |
2293 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2294 | ||
2295 | /* Format the IO accounting data for inclusion in the human language message string, but only | |
2296 | * for the bytes counters (and not for the operations counters) */ | |
2297 | if (k == CGROUP_IO_READ_BYTES) { | |
2298 | assert(!rr); | |
2299 | rr = strjoin("read ", format_bytes(buf, sizeof(buf), value), " from disk"); | |
2300 | if (!rr) { | |
2301 | r = log_oom(); | |
2302 | goto finish; | |
2303 | } | |
2304 | } else if (k == CGROUP_IO_WRITE_BYTES) { | |
2305 | assert(!wr); | |
2306 | wr = strjoin("written ", format_bytes(buf, sizeof(buf), value), " to disk"); | |
2307 | if (!wr) { | |
2308 | r = log_oom(); | |
2309 | goto finish; | |
2310 | } | |
2311 | } | |
37109b85 ZJS |
2312 | |
2313 | if (IN_SET(k, CGROUP_IO_READ_BYTES, CGROUP_IO_WRITE_BYTES)) | |
2314 | log_level = raise_level(log_level, | |
2315 | value > MENTIONWORTHY_IO_BYTES, | |
2316 | value > NOTICEWORTHY_IO_BYTES); | |
bc40a20e LP |
2317 | } |
2318 | ||
2319 | if (have_io_accounting) { | |
2320 | if (any_io) { | |
2321 | if (rr) | |
2322 | message_parts[n_message_parts++] = TAKE_PTR(rr); | |
2323 | if (wr) | |
2324 | message_parts[n_message_parts++] = TAKE_PTR(wr); | |
2325 | ||
2326 | } else { | |
2327 | char *k; | |
2328 | ||
2329 | k = strdup("no IO"); | |
2330 | if (!k) { | |
2331 | r = log_oom(); | |
2332 | goto finish; | |
2333 | } | |
2334 | ||
2335 | message_parts[n_message_parts++] = k; | |
2336 | } | |
2337 | } | |
2338 | ||
12375b95 | 2339 | for (CGroupIPAccountingMetric m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
915b1d01 LP |
2340 | char buf[FORMAT_BYTES_MAX] = ""; |
2341 | uint64_t value = UINT64_MAX; | |
2342 | ||
2343 | assert(ip_fields[m]); | |
2344 | ||
2345 | (void) unit_get_ip_accounting(u, m, &value); | |
2346 | if (value == UINT64_MAX) | |
2347 | continue; | |
82044702 LP |
2348 | |
2349 | have_ip_accounting = true; | |
a87b1faa LP |
2350 | if (value > 0) |
2351 | any_traffic = true; | |
915b1d01 LP |
2352 | |
2353 | /* Format IP accounting data for inclusion in the structured log message */ | |
2354 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2355 | r = log_oom(); | |
2356 | goto finish; | |
2357 | } | |
2358 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2359 | ||
2360 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2361 | * bytes counters (and not for the packets counters) */ | |
a87b1faa LP |
2362 | if (m == CGROUP_IP_INGRESS_BYTES) { |
2363 | assert(!igress); | |
ec9d636b | 2364 | igress = strjoin("received ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2365 | if (!igress) { |
2366 | r = log_oom(); | |
2367 | goto finish; | |
2368 | } | |
2369 | } else if (m == CGROUP_IP_EGRESS_BYTES) { | |
2370 | assert(!egress); | |
ec9d636b | 2371 | egress = strjoin("sent ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2372 | if (!egress) { |
2373 | r = log_oom(); | |
2374 | goto finish; | |
2375 | } | |
2376 | } | |
37109b85 ZJS |
2377 | |
2378 | if (IN_SET(m, CGROUP_IP_INGRESS_BYTES, CGROUP_IP_EGRESS_BYTES)) | |
2379 | log_level = raise_level(log_level, | |
2380 | value > MENTIONWORTHY_IP_BYTES, | |
2381 | value > NOTICEWORTHY_IP_BYTES); | |
a87b1faa LP |
2382 | } |
2383 | ||
c2503e35 RH |
2384 | /* This check is here because it is the earliest point following all possible log_level assignments. If |
2385 | * log_level is assigned anywhere after this point, move this check. */ | |
2386 | if (!unit_log_level_test(u, log_level)) { | |
2387 | r = 0; | |
2388 | goto finish; | |
2389 | } | |
2390 | ||
82044702 LP |
2391 | if (have_ip_accounting) { |
2392 | if (any_traffic) { | |
2393 | if (igress) | |
2394 | message_parts[n_message_parts++] = TAKE_PTR(igress); | |
2395 | if (egress) | |
2396 | message_parts[n_message_parts++] = TAKE_PTR(egress); | |
a87b1faa | 2397 | |
82044702 LP |
2398 | } else { |
2399 | char *k; | |
915b1d01 | 2400 | |
82044702 LP |
2401 | k = strdup("no IP traffic"); |
2402 | if (!k) { | |
2403 | r = log_oom(); | |
2404 | goto finish; | |
2405 | } | |
2406 | ||
2407 | message_parts[n_message_parts++] = k; | |
2408 | } | |
915b1d01 LP |
2409 | } |
2410 | ||
2411 | /* Is there any accounting data available at all? */ | |
2412 | if (n_iovec == 0) { | |
2413 | r = 0; | |
2414 | goto finish; | |
2415 | } | |
2416 | ||
2417 | if (n_message_parts == 0) | |
a87b1faa | 2418 | t = strjoina("MESSAGE=", u->id, ": Completed."); |
915b1d01 | 2419 | else { |
c2b2df60 | 2420 | _cleanup_free_ char *joined = NULL; |
915b1d01 LP |
2421 | |
2422 | message_parts[n_message_parts] = NULL; | |
2423 | ||
2424 | joined = strv_join(message_parts, ", "); | |
2425 | if (!joined) { | |
2426 | r = log_oom(); | |
2427 | goto finish; | |
2428 | } | |
2429 | ||
ec9d636b | 2430 | joined[0] = ascii_toupper(joined[0]); |
a87b1faa | 2431 | t = strjoina("MESSAGE=", u->id, ": ", joined, "."); |
915b1d01 LP |
2432 | } |
2433 | ||
2434 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2435 | * and hence don't increase n_iovec for them */ | |
2436 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2437 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2438 | ||
2439 | t = strjoina(u->manager->unit_log_field, u->id); | |
2440 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2441 | ||
2442 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2443 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2444 | ||
c2503e35 | 2445 | log_unit_struct_iovec(u, log_level, iovec, n_iovec + 4); |
915b1d01 LP |
2446 | r = 0; |
2447 | ||
2448 | finish: | |
12375b95 | 2449 | for (size_t i = 0; i < n_message_parts; i++) |
915b1d01 LP |
2450 | free(message_parts[i]); |
2451 | ||
12375b95 | 2452 | for (size_t i = 0; i < n_iovec; i++) |
915b1d01 LP |
2453 | free(iovec[i].iov_base); |
2454 | ||
2455 | return r; | |
2456 | ||
2457 | } | |
2458 | ||
adefcf28 LP |
2459 | static void unit_update_on_console(Unit *u) { |
2460 | bool b; | |
2461 | ||
2462 | assert(u); | |
2463 | ||
2464 | b = unit_needs_console(u); | |
2465 | if (u->on_console == b) | |
2466 | return; | |
2467 | ||
2468 | u->on_console = b; | |
2469 | if (b) | |
2470 | manager_ref_console(u->manager); | |
2471 | else | |
2472 | manager_unref_console(u->manager); | |
adefcf28 LP |
2473 | } |
2474 | ||
6eb65e7c LP |
2475 | static void unit_emit_audit_start(Unit *u) { |
2476 | assert(u); | |
2477 | ||
2478 | if (u->type != UNIT_SERVICE) | |
2479 | return; | |
2480 | ||
2481 | /* Write audit record if we have just finished starting up */ | |
2482 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); | |
2483 | u->in_audit = true; | |
2484 | } | |
2485 | ||
2486 | static void unit_emit_audit_stop(Unit *u, UnitActiveState state) { | |
2487 | assert(u); | |
2488 | ||
2489 | if (u->type != UNIT_SERVICE) | |
2490 | return; | |
2491 | ||
2492 | if (u->in_audit) { | |
2493 | /* Write audit record if we have just finished shutting down */ | |
2494 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, state == UNIT_INACTIVE); | |
2495 | u->in_audit = false; | |
2496 | } else { | |
2497 | /* Hmm, if there was no start record written write it now, so that we always have a nice pair */ | |
2498 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, state == UNIT_INACTIVE); | |
2499 | ||
2500 | if (state == UNIT_INACTIVE) | |
2501 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); | |
2502 | } | |
2503 | } | |
2504 | ||
16c74914 LP |
2505 | static bool unit_process_job(Job *j, UnitActiveState ns, UnitNotifyFlags flags) { |
2506 | bool unexpected = false; | |
31cd5f63 | 2507 | JobResult result; |
16c74914 LP |
2508 | |
2509 | assert(j); | |
2510 | ||
2511 | if (j->state == JOB_WAITING) | |
2512 | ||
2513 | /* So we reached a different state for this job. Let's see if we can run it now if it failed previously | |
2514 | * due to EAGAIN. */ | |
2515 | job_add_to_run_queue(j); | |
2516 | ||
2517 | /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and | |
2518 | * hence needs to invalidate jobs. */ | |
2519 | ||
2520 | switch (j->type) { | |
2521 | ||
2522 | case JOB_START: | |
2523 | case JOB_VERIFY_ACTIVE: | |
2524 | ||
2525 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
2526 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2527 | else if (j->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
2528 | unexpected = true; | |
2529 | ||
31cd5f63 AZ |
2530 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
2531 | if (ns == UNIT_FAILED) | |
2532 | result = JOB_FAILED; | |
31cd5f63 AZ |
2533 | else |
2534 | result = JOB_DONE; | |
2535 | ||
2536 | job_finish_and_invalidate(j, result, true, false); | |
2537 | } | |
16c74914 LP |
2538 | } |
2539 | ||
2540 | break; | |
2541 | ||
2542 | case JOB_RELOAD: | |
2543 | case JOB_RELOAD_OR_START: | |
2544 | case JOB_TRY_RELOAD: | |
2545 | ||
2546 | if (j->state == JOB_RUNNING) { | |
2547 | if (ns == UNIT_ACTIVE) | |
2548 | job_finish_and_invalidate(j, (flags & UNIT_NOTIFY_RELOAD_FAILURE) ? JOB_FAILED : JOB_DONE, true, false); | |
2549 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { | |
2550 | unexpected = true; | |
2551 | ||
2552 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2553 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2554 | } | |
2555 | } | |
2556 | ||
2557 | break; | |
2558 | ||
2559 | case JOB_STOP: | |
2560 | case JOB_RESTART: | |
2561 | case JOB_TRY_RESTART: | |
2562 | ||
2563 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2564 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2565 | else if (j->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
2566 | unexpected = true; | |
2567 | job_finish_and_invalidate(j, JOB_FAILED, true, false); | |
2568 | } | |
2569 | ||
2570 | break; | |
2571 | ||
2572 | default: | |
2573 | assert_not_reached("Job type unknown"); | |
2574 | } | |
2575 | ||
2576 | return unexpected; | |
2577 | } | |
2578 | ||
2ad2e41a | 2579 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, UnitNotifyFlags flags) { |
429926e9 | 2580 | const char *reason; |
8559b3b7 | 2581 | Manager *m; |
a096ed36 | 2582 | |
87f0e418 LP |
2583 | assert(u); |
2584 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2585 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2586 | |
8559b3b7 LP |
2587 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2588 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2589 | * remounted this function will be called too! */ | |
87f0e418 | 2590 | |
546ac4f0 MS |
2591 | m = u->manager; |
2592 | ||
3c4832ad LP |
2593 | /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in |
2594 | * the bus queue, so that any job change signal queued will force out the unit change signal first. */ | |
2595 | unit_add_to_dbus_queue(u); | |
2596 | ||
e30bbc90 AZ |
2597 | /* Update systemd-oomd on the property/state change */ |
2598 | if (os != ns) { | |
2599 | /* Always send an update if the unit is going into an inactive state so systemd-oomd knows to stop | |
2600 | * monitoring. | |
2601 | * Also send an update whenever the unit goes active; this is to handle a case where an override file | |
2602 | * sets one of the ManagedOOM*= properties to "kill", then later removes it. systemd-oomd needs to | |
2603 | * know to stop monitoring when the unit changes from "kill" -> "auto" on daemon-reload, but we don't | |
2604 | * have the information on the property. Thus, indiscriminately send an update. */ | |
f561e8c6 | 2605 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) || UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
e30bbc90 AZ |
2606 | (void) manager_varlink_send_managed_oom_update(u); |
2607 | } | |
2608 | ||
f755e3b7 | 2609 | /* Update timestamps for state changes */ |
2c289ea8 | 2610 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2611 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2612 | |
bdbf9951 | 2613 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2614 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2615 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2616 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2617 | |
2618 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2619 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2620 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2621 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2622 | } |
87f0e418 | 2623 | |
865cc19a | 2624 | /* Keep track of failed units */ |
8724defe | 2625 | (void) manager_update_failed_units(m, u, ns == UNIT_FAILED); |
f755e3b7 | 2626 | |
d3070fbd LP |
2627 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2628 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
ff68472a ZJS |
2629 | SET_FLAG(u->markers, |
2630 | (1u << UNIT_MARKER_NEEDS_RELOAD)|(1u << UNIT_MARKER_NEEDS_RESTART), | |
2631 | false); | |
efdb0237 | 2632 | unit_prune_cgroup(u); |
d3070fbd | 2633 | unit_unlink_state_files(u); |
ff68472a ZJS |
2634 | } else if (ns != os && ns == UNIT_RELOADING) |
2635 | SET_FLAG(u->markers, 1u << UNIT_MARKER_NEEDS_RELOAD, false); | |
fb385181 | 2636 | |
adefcf28 | 2637 | unit_update_on_console(u); |
7ed9f6cd | 2638 | |
2c289ea8 | 2639 | if (!MANAGER_IS_RELOADING(m)) { |
a1c7334b LP |
2640 | bool unexpected; |
2641 | ||
2642 | /* Let's propagate state changes to the job */ | |
2643 | if (u->job) | |
2644 | unexpected = unit_process_job(u->job, ns, flags); | |
2645 | else | |
2646 | unexpected = true; | |
f3bff0eb | 2647 | |
a1c7334b LP |
2648 | /* If this state change happened without being requested by a job, then let's retroactively start or |
2649 | * stop dependencies. We skip that step when deserializing, since we don't want to create any | |
2650 | * additional jobs just because something is already activated. */ | |
bdbf9951 LP |
2651 | |
2652 | if (unexpected) { | |
2653 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2654 | retroactively_start_dependencies(u); | |
2655 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2656 | retroactively_stop_dependencies(u); | |
2657 | } | |
5de9682c | 2658 | |
bdbf9951 | 2659 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2660 | log_unit_debug(u, "Unit entered failed state."); |
2ad2e41a LP |
2661 | |
2662 | if (!(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
294446dc | 2663 | unit_start_on_failure(u, "OnFailure=", UNIT_ATOM_ON_FAILURE, u->on_failure_job_mode); |
cd6d0a45 | 2664 | } |
e537352b | 2665 | |
256f65d0 LP |
2666 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns) && !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
2667 | /* This unit just finished starting up */ | |
3b2775c5 | 2668 | |
6eb65e7c | 2669 | unit_emit_audit_start(u); |
546ac4f0 | 2670 | manager_send_unit_plymouth(m, u); |
256f65d0 | 2671 | } |
bdbf9951 | 2672 | |
256f65d0 | 2673 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && !UNIT_IS_INACTIVE_OR_FAILED(os)) { |
915b1d01 | 2674 | /* This unit just stopped/failed. */ |
256f65d0 | 2675 | |
6eb65e7c | 2676 | unit_emit_audit_stop(u, ns); |
915b1d01 | 2677 | unit_log_resources(u); |
cd6d0a45 | 2678 | } |
294446dc LP |
2679 | |
2680 | if (ns == UNIT_INACTIVE && !IN_SET(os, UNIT_FAILED, UNIT_INACTIVE, UNIT_MAINTENANCE) && | |
2681 | !(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
2682 | unit_start_on_failure(u, "OnSuccess=", UNIT_ATOM_ON_SUCCESS, u->on_success_job_mode); | |
f278026d LP |
2683 | } |
2684 | ||
31dc1ca3 LP |
2685 | manager_recheck_journal(m); |
2686 | manager_recheck_dbus(m); | |
e63ebf71 | 2687 | |
3ecaa09b | 2688 | unit_trigger_notify(u); |
3b2775c5 | 2689 | |
8724defe | 2690 | if (!MANAGER_IS_RELOADING(m)) { |
429926e9 TR |
2691 | if (os != UNIT_FAILED && ns == UNIT_FAILED) { |
2692 | reason = strjoina("unit ", u->id, " failed"); | |
36c4dc08 | 2693 | emergency_action(m, u->failure_action, 0, u->reboot_arg, unit_failure_action_exit_status(u), reason); |
429926e9 TR |
2694 | } else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) { |
2695 | reason = strjoina("unit ", u->id, " succeeded"); | |
36c4dc08 | 2696 | emergency_action(m, u->success_action, 0, u->reboot_arg, unit_success_action_exit_status(u), reason); |
429926e9 | 2697 | } |
ff502445 LP |
2698 | } |
2699 | ||
99e9af25 | 2700 | /* And now, add the unit or depending units to various queues that will act on the new situation if |
48008c1c | 2701 | * needed. These queues generally check for continuous state changes rather than events (like most of |
99e9af25 LP |
2702 | * the state propagation above), and do work deferred instead of instantly, since they typically |
2703 | * don't want to run during reloading, and usually involve checking combined state of multiple units | |
2704 | * at once. */ | |
2705 | ||
2706 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
2707 | /* Stop unneeded units and bound-by units regardless if going down was expected or not */ | |
2708 | check_unneeded_dependencies(u); | |
2709 | check_bound_by_dependencies(u); | |
2710 | ||
2711 | /* Maybe someone wants us to remain up? */ | |
2712 | unit_submit_to_start_when_upheld_queue(u); | |
2713 | ||
2714 | /* Maybe the unit should be GC'ed now? */ | |
2715 | unit_add_to_gc_queue(u); | |
2716 | } | |
2717 | ||
2718 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
2719 | /* Start uphold units regardless if going up was expected or not */ | |
2720 | check_uphold_dependencies(u); | |
2721 | ||
2722 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ | |
2723 | unit_submit_to_stop_when_unneeded_queue(u); | |
2724 | ||
2725 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens | |
2726 | * when something BindsTo= to a Type=oneshot unit, as these units go directly from starting to | |
2727 | * inactive, without ever entering started.) */ | |
2728 | unit_submit_to_stop_when_bound_queue(u); | |
2729 | } | |
87f0e418 LP |
2730 | } |
2731 | ||
f75f613d | 2732 | int unit_watch_pid(Unit *u, pid_t pid, bool exclusive) { |
62a76913 | 2733 | int r; |
a911bb9a | 2734 | |
87f0e418 | 2735 | assert(u); |
62a76913 | 2736 | assert(pid_is_valid(pid)); |
87f0e418 | 2737 | |
62a76913 | 2738 | /* Watch a specific PID */ |
5ba6985b | 2739 | |
f75f613d FB |
2740 | /* Caller might be sure that this PID belongs to this unit only. Let's take this |
2741 | * opportunity to remove any stalled references to this PID as they can be created | |
2742 | * easily (when watching a process which is not our direct child). */ | |
2743 | if (exclusive) | |
2744 | manager_unwatch_pid(u->manager, pid); | |
2745 | ||
d5099efc | 2746 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2747 | if (r < 0) |
2748 | return r; | |
2749 | ||
62a76913 | 2750 | r = hashmap_ensure_allocated(&u->manager->watch_pids, NULL); |
a911bb9a LP |
2751 | if (r < 0) |
2752 | return r; | |
2753 | ||
62a76913 LP |
2754 | /* First try, let's add the unit keyed by "pid". */ |
2755 | r = hashmap_put(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2756 | if (r == -EEXIST) { | |
2757 | Unit **array; | |
2758 | bool found = false; | |
2759 | size_t n = 0; | |
05e343b7 | 2760 | |
62a76913 LP |
2761 | /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points |
2762 | * to an array of Units rather than just a Unit), lists us already. */ | |
a911bb9a | 2763 | |
62a76913 LP |
2764 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); |
2765 | if (array) | |
2766 | for (; array[n]; n++) | |
2767 | if (array[n] == u) | |
2768 | found = true; | |
a911bb9a | 2769 | |
62a76913 LP |
2770 | if (found) /* Found it already? if so, do nothing */ |
2771 | r = 0; | |
2772 | else { | |
2773 | Unit **new_array; | |
2774 | ||
2775 | /* Allocate a new array */ | |
2776 | new_array = new(Unit*, n + 2); | |
2777 | if (!new_array) | |
2778 | return -ENOMEM; | |
2779 | ||
2780 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2781 | new_array[n] = u; | |
2782 | new_array[n+1] = NULL; | |
2783 | ||
2784 | /* Add or replace the old array */ | |
2785 | r = hashmap_replace(u->manager->watch_pids, PID_TO_PTR(-pid), new_array); | |
2786 | if (r < 0) { | |
2787 | free(new_array); | |
2788 | return r; | |
2789 | } | |
2790 | ||
2791 | free(array); | |
2792 | } | |
2793 | } else if (r < 0) | |
2794 | return r; | |
2795 | ||
2796 | r = set_put(u->pids, PID_TO_PTR(pid)); | |
2797 | if (r < 0) | |
2798 | return r; | |
2799 | ||
2800 | return 0; | |
87f0e418 LP |
2801 | } |
2802 | ||
2803 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
62a76913 LP |
2804 | Unit **array; |
2805 | ||
87f0e418 | 2806 | assert(u); |
62a76913 LP |
2807 | assert(pid_is_valid(pid)); |
2808 | ||
2809 | /* First let's drop the unit in case it's keyed as "pid". */ | |
2810 | (void) hashmap_remove_value(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2811 | ||
2812 | /* Then, let's also drop the unit, in case it's in the array keyed by -pid */ | |
2813 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); | |
2814 | if (array) { | |
62a76913 | 2815 | /* Let's iterate through the array, dropping our own entry */ |
12375b95 ZJS |
2816 | |
2817 | size_t m = 0; | |
2818 | for (size_t n = 0; array[n]; n++) | |
62a76913 LP |
2819 | if (array[n] != u) |
2820 | array[m++] = array[n]; | |
2821 | array[m] = NULL; | |
2822 | ||
2823 | if (m == 0) { | |
2824 | /* The array is now empty, remove the entire entry */ | |
20c3acfa | 2825 | assert_se(hashmap_remove(u->manager->watch_pids, PID_TO_PTR(-pid)) == array); |
62a76913 LP |
2826 | free(array); |
2827 | } | |
2828 | } | |
87f0e418 | 2829 | |
fea72cc0 | 2830 | (void) set_remove(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2831 | } |
2832 | ||
bd44e61b LP |
2833 | void unit_unwatch_all_pids(Unit *u) { |
2834 | assert(u); | |
2835 | ||
2836 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2837 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2838 | |
efdb0237 | 2839 | u->pids = set_free(u->pids); |
a911bb9a LP |
2840 | } |
2841 | ||
50be4f4a LP |
2842 | static void unit_tidy_watch_pids(Unit *u) { |
2843 | pid_t except1, except2; | |
a911bb9a LP |
2844 | void *e; |
2845 | ||
2846 | assert(u); | |
2847 | ||
2848 | /* Cleans dead PIDs from our list */ | |
2849 | ||
50be4f4a LP |
2850 | except1 = unit_main_pid(u); |
2851 | except2 = unit_control_pid(u); | |
2852 | ||
90e74a66 | 2853 | SET_FOREACH(e, u->pids) { |
fea72cc0 | 2854 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2855 | |
2856 | if (pid == except1 || pid == except2) | |
2857 | continue; | |
2858 | ||
9f5650ae | 2859 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2860 | unit_unwatch_pid(u, pid); |
a911bb9a | 2861 | } |
87f0e418 LP |
2862 | } |
2863 | ||
50be4f4a LP |
2864 | static int on_rewatch_pids_event(sd_event_source *s, void *userdata) { |
2865 | Unit *u = userdata; | |
2866 | ||
2867 | assert(s); | |
2868 | assert(u); | |
2869 | ||
2870 | unit_tidy_watch_pids(u); | |
2871 | unit_watch_all_pids(u); | |
2872 | ||
2873 | /* If the PID set is empty now, then let's finish this off. */ | |
2874 | unit_synthesize_cgroup_empty_event(u); | |
2875 | ||
2876 | return 0; | |
2877 | } | |
2878 | ||
2879 | int unit_enqueue_rewatch_pids(Unit *u) { | |
2880 | int r; | |
2881 | ||
2882 | assert(u); | |
2883 | ||
2884 | if (!u->cgroup_path) | |
2885 | return -ENOENT; | |
2886 | ||
2887 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
2888 | if (r < 0) | |
2889 | return r; | |
2890 | if (r > 0) /* On unified we can use proper notifications */ | |
2891 | return 0; | |
2892 | ||
2893 | /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new | |
2894 | * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it | |
2895 | * involves issuing kill(pid, 0) on all processes we watch. */ | |
2896 | ||
2897 | if (!u->rewatch_pids_event_source) { | |
2898 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
2899 | ||
2900 | r = sd_event_add_defer(u->manager->event, &s, on_rewatch_pids_event, u); | |
2901 | if (r < 0) | |
2902 | return log_error_errno(r, "Failed to allocate event source for tidying watched PIDs: %m"); | |
2903 | ||
2904 | r = sd_event_source_set_priority(s, SD_EVENT_PRIORITY_IDLE); | |
2905 | if (r < 0) | |
28b77ab2 | 2906 | return log_error_errno(r, "Failed to adjust priority of event source for tidying watched PIDs: %m"); |
50be4f4a LP |
2907 | |
2908 | (void) sd_event_source_set_description(s, "tidy-watch-pids"); | |
2909 | ||
2910 | u->rewatch_pids_event_source = TAKE_PTR(s); | |
2911 | } | |
2912 | ||
2913 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_ONESHOT); | |
2914 | if (r < 0) | |
2915 | return log_error_errno(r, "Failed to enable event source for tidying watched PIDs: %m"); | |
2916 | ||
2917 | return 0; | |
2918 | } | |
2919 | ||
2920 | void unit_dequeue_rewatch_pids(Unit *u) { | |
2921 | int r; | |
2922 | assert(u); | |
2923 | ||
2924 | if (!u->rewatch_pids_event_source) | |
2925 | return; | |
2926 | ||
2927 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_OFF); | |
2928 | if (r < 0) | |
2929 | log_warning_errno(r, "Failed to disable event source for tidying watched PIDs, ignoring: %m"); | |
2930 | ||
2931 | u->rewatch_pids_event_source = sd_event_source_unref(u->rewatch_pids_event_source); | |
2932 | } | |
2933 | ||
87f0e418 LP |
2934 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2935 | assert(u); | |
2936 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2937 | ||
2938 | switch (j) { | |
2939 | ||
2940 | case JOB_VERIFY_ACTIVE: | |
2941 | case JOB_START: | |
e0209d83 | 2942 | case JOB_NOP: |
f5869324 | 2943 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
86b52a39 | 2944 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueuing |
f5869324 | 2945 | * jobs for it. */ |
87f0e418 LP |
2946 | return true; |
2947 | ||
f5869324 LP |
2948 | case JOB_STOP: |
2949 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
86b52a39 | 2950 | * external events), hence it makes no sense to permit enqueuing such a request either. */ |
f5869324 LP |
2951 | return !u->perpetual; |
2952 | ||
87f0e418 LP |
2953 | case JOB_RESTART: |
2954 | case JOB_TRY_RESTART: | |
f5869324 | 2955 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
2956 | |
2957 | case JOB_RELOAD: | |
3282591d | 2958 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2959 | return unit_can_reload(u); |
2960 | ||
2961 | case JOB_RELOAD_OR_START: | |
2962 | return unit_can_reload(u) && unit_can_start(u); | |
2963 | ||
2964 | default: | |
2965 | assert_not_reached("Invalid job type"); | |
2966 | } | |
2967 | } | |
2968 | ||
eef85c4a LP |
2969 | int unit_add_dependency( |
2970 | Unit *u, | |
2971 | UnitDependency d, | |
2972 | Unit *other, | |
2973 | bool add_reference, | |
2974 | UnitDependencyMask mask) { | |
87f0e418 LP |
2975 | |
2976 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2977 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
be7d9ff7 | 2978 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7e9212bf | 2979 | [UNIT_WANTS] = UNIT_WANTED_BY, |
7f2cddae | 2980 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2981 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
0bc488c9 | 2982 | [UNIT_UPHOLDS] = UNIT_UPHELD_BY, |
be7d9ff7 | 2983 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 2984 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 2985 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 2986 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2987 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
0bc488c9 | 2988 | [UNIT_UPHELD_BY] = UNIT_UPHOLDS, |
69dd2852 LP |
2989 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2990 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2991 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2992 | [UNIT_AFTER] = UNIT_BEFORE, |
294446dc LP |
2993 | [UNIT_ON_SUCCESS] = UNIT_ON_SUCCESS_OF, |
2994 | [UNIT_ON_SUCCESS_OF] = UNIT_ON_SUCCESS, | |
629b2a6f LP |
2995 | [UNIT_ON_FAILURE] = UNIT_ON_FAILURE_OF, |
2996 | [UNIT_ON_FAILURE_OF] = UNIT_ON_FAILURE, | |
57020a3a | 2997 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, |
4dcc1cb4 | 2998 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2999 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 3000 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
ffec78c0 LP |
3001 | [UNIT_PROPAGATES_STOP_TO] = UNIT_STOP_PROPAGATED_FROM, |
3002 | [UNIT_STOP_PROPAGATED_FROM] = UNIT_PROPAGATES_STOP_TO, | |
defe63b0 | 3003 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, /* symmetric! 👓 */ |
7e9212bf LP |
3004 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
3005 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, | |
d219a2b0 LP |
3006 | [UNIT_IN_SLICE] = UNIT_SLICE_OF, |
3007 | [UNIT_SLICE_OF] = UNIT_IN_SLICE, | |
87f0e418 | 3008 | }; |
eef85c4a | 3009 | Unit *original_u = u, *original_other = other; |
15ed3c3a | 3010 | UnitDependencyAtom a; |
eef85c4a | 3011 | int r; |
15ed3c3a LP |
3012 | |
3013 | /* Helper to know whether sending a notification is necessary or not: if the dependency is already | |
3014 | * there, no need to notify! */ | |
3015 | bool noop; | |
87f0e418 LP |
3016 | |
3017 | assert(u); | |
3018 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
3019 | assert(other); |
3020 | ||
9f151f29 LP |
3021 | u = unit_follow_merge(u); |
3022 | other = unit_follow_merge(other); | |
15ed3c3a LP |
3023 | a = unit_dependency_to_atom(d); |
3024 | assert(a >= 0); | |
9f151f29 | 3025 | |
15ed3c3a | 3026 | /* We won't allow dependencies on ourselves. We will not consider them an error however. */ |
d1fab3fe | 3027 | if (u == other) { |
15ed3c3a | 3028 | unit_maybe_warn_about_dependency(original_u, original_other->id, d); |
87f0e418 | 3029 | return 0; |
d1fab3fe | 3030 | } |
87f0e418 | 3031 | |
15ed3c3a LP |
3032 | /* Note that ordering a device unit after a unit is permitted since it allows to start its job |
3033 | * running timeout at a specific time. */ | |
3034 | if (FLAGS_SET(a, UNIT_ATOM_BEFORE) && other->type == UNIT_DEVICE) { | |
b862c257 | 3035 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
c80a9a33 LP |
3036 | return 0; |
3037 | } | |
3038 | ||
15ed3c3a | 3039 | if (FLAGS_SET(a, UNIT_ATOM_ON_FAILURE) && !UNIT_VTABLE(u)->can_fail) { |
c80a9a33 LP |
3040 | log_unit_warning(u, "Requested dependency OnFailure=%s ignored (%s units cannot fail).", other->id, unit_type_to_string(u->type)); |
3041 | return 0; | |
3042 | } | |
3043 | ||
15ed3c3a | 3044 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERS) && !UNIT_VTABLE(u)->can_trigger) |
c80a9a33 LP |
3045 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3046 | "Requested dependency Triggers=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(u->type)); | |
15ed3c3a | 3047 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERED_BY) && !UNIT_VTABLE(other)->can_trigger) |
c80a9a33 LP |
3048 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3049 | "Requested dependency TriggeredBy=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(other->type)); | |
3050 | ||
d219a2b0 LP |
3051 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && other->type != UNIT_SLICE) |
3052 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3053 | "Requested dependency Slice=%s refused (%s is not a slice unit).", other->id, other->id); | |
3054 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && u->type != UNIT_SLICE) | |
3055 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3056 | "Requested dependency SliceOf=%s refused (%s is not a slice unit).", other->id, u->id); | |
3057 | ||
3058 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && !UNIT_HAS_CGROUP_CONTEXT(u)) | |
3059 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3060 | "Requested dependency Slice=%s refused (%s is not a cgroup unit).", other->id, u->id); | |
3061 | ||
3062 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && !UNIT_HAS_CGROUP_CONTEXT(other)) | |
3063 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3064 | "Requested dependency SliceOf=%s refused (%s is not a cgroup unit).", other->id, other->id); | |
3065 | ||
15ed3c3a | 3066 | r = unit_add_dependency_hashmap(&u->dependencies, d, other, mask, 0); |
613b411c | 3067 | if (r < 0) |
87f0e418 | 3068 | return r; |
15ed3c3a | 3069 | noop = !r; |
87f0e418 | 3070 | |
eef85c4a | 3071 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
15ed3c3a | 3072 | r = unit_add_dependency_hashmap(&other->dependencies, inverse_table[d], u, 0, mask); |
613b411c LP |
3073 | if (r < 0) |
3074 | return r; | |
15ed3c3a | 3075 | if (r) |
5177cb0a | 3076 | noop = false; |
613b411c LP |
3077 | } |
3078 | ||
3079 | if (add_reference) { | |
15ed3c3a | 3080 | r = unit_add_dependency_hashmap(&u->dependencies, UNIT_REFERENCES, other, mask, 0); |
613b411c | 3081 | if (r < 0) |
5de9682c | 3082 | return r; |
15ed3c3a | 3083 | if (r) |
5177cb0a | 3084 | noop = false; |
5de9682c | 3085 | |
15ed3c3a | 3086 | r = unit_add_dependency_hashmap(&other->dependencies, UNIT_REFERENCED_BY, u, 0, mask); |
613b411c | 3087 | if (r < 0) |
701cc384 | 3088 | return r; |
15ed3c3a | 3089 | if (r) |
5177cb0a | 3090 | noop = false; |
613b411c | 3091 | } |
87f0e418 | 3092 | |
5177cb0a RM |
3093 | if (!noop) |
3094 | unit_add_to_dbus_queue(u); | |
15ed3c3a | 3095 | |
87f0e418 LP |
3096 | return 0; |
3097 | } | |
0301abf4 | 3098 | |
eef85c4a | 3099 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
2c966c03 LP |
3100 | int r; |
3101 | ||
3102 | assert(u); | |
3103 | ||
eef85c4a | 3104 | r = unit_add_dependency(u, d, other, add_reference, mask); |
3f3cc397 | 3105 | if (r < 0) |
2c966c03 LP |
3106 | return r; |
3107 | ||
eef85c4a | 3108 | return unit_add_dependency(u, e, other, add_reference, mask); |
2c966c03 LP |
3109 | } |
3110 | ||
23e8c796 | 3111 | static int resolve_template(Unit *u, const char *name, char **buf, const char **ret) { |
7410616c | 3112 | int r; |
9e2f7c11 LP |
3113 | |
3114 | assert(u); | |
23e8c796 | 3115 | assert(name); |
7410616c LP |
3116 | assert(buf); |
3117 | assert(ret); | |
9e2f7c11 | 3118 | |
7410616c LP |
3119 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
3120 | *buf = NULL; | |
3121 | *ret = name; | |
3122 | return 0; | |
9e2f7c11 LP |
3123 | } |
3124 | ||
ac155bb8 | 3125 | if (u->instance) |
7410616c | 3126 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 3127 | else { |
ae018d9b | 3128 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 3129 | |
7410616c LP |
3130 | r = unit_name_to_prefix(u->id, &i); |
3131 | if (r < 0) | |
3132 | return r; | |
9e2f7c11 | 3133 | |
7410616c | 3134 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 3135 | } |
7410616c LP |
3136 | if (r < 0) |
3137 | return r; | |
9e2f7c11 | 3138 | |
7410616c LP |
3139 | *ret = *buf; |
3140 | return 0; | |
9e2f7c11 LP |
3141 | } |
3142 | ||
35d8c19a | 3143 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3144 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
3145 | Unit *other; |
3146 | int r; | |
3147 | ||
9e2f7c11 | 3148 | assert(u); |
35d8c19a | 3149 | assert(name); |
09b6b09f | 3150 | |
23e8c796 | 3151 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3152 | if (r < 0) |
3153 | return r; | |
09b6b09f | 3154 | |
35d8c19a | 3155 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
8afbb8e1 LP |
3156 | if (r < 0) |
3157 | return r; | |
9e2f7c11 | 3158 | |
eef85c4a | 3159 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
3160 | } |
3161 | ||
5a724170 | 3162 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3163 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
3164 | Unit *other; |
3165 | int r; | |
2c966c03 LP |
3166 | |
3167 | assert(u); | |
5a724170 | 3168 | assert(name); |
2c966c03 | 3169 | |
23e8c796 | 3170 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3171 | if (r < 0) |
3172 | return r; | |
2c966c03 | 3173 | |
5a724170 | 3174 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
3f3cc397 | 3175 | if (r < 0) |
68eda4bd | 3176 | return r; |
2c966c03 | 3177 | |
eef85c4a | 3178 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
3179 | } |
3180 | ||
0301abf4 | 3181 | int set_unit_path(const char *p) { |
0301abf4 | 3182 | /* This is mostly for debug purposes */ |
cbe46ead | 3183 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 3184 | return -errno; |
0301abf4 LP |
3185 | |
3186 | return 0; | |
3187 | } | |
88066b3a | 3188 | |
ea430986 | 3189 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
3190 | assert(u); |
3191 | ||
ac155bb8 | 3192 | if (!u->id) |
04ade7d2 LP |
3193 | return NULL; |
3194 | ||
48899192 | 3195 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
3196 | } |
3197 | ||
4b58153d LP |
3198 | char *unit_dbus_path_invocation_id(Unit *u) { |
3199 | assert(u); | |
3200 | ||
3201 | if (sd_id128_is_null(u->invocation_id)) | |
3202 | return NULL; | |
3203 | ||
3204 | return unit_dbus_path_from_name(u->invocation_id_string); | |
3205 | } | |
3206 | ||
2d3b784d | 3207 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { |
db868d45 ZJS |
3208 | int r; |
3209 | ||
3210 | assert(u); | |
3211 | ||
3212 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
3213 | ||
3214 | if (sd_id128_equal(u->invocation_id, id)) | |
3215 | return 0; | |
3216 | ||
3217 | if (!sd_id128_is_null(u->invocation_id)) | |
3218 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3219 | ||
3220 | if (sd_id128_is_null(id)) { | |
3221 | r = 0; | |
3222 | goto reset; | |
3223 | } | |
3224 | ||
3225 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
3226 | if (r < 0) | |
3227 | goto reset; | |
3228 | ||
3229 | u->invocation_id = id; | |
3230 | sd_id128_to_string(id, u->invocation_id_string); | |
3231 | ||
3232 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3233 | if (r < 0) | |
3234 | goto reset; | |
3235 | ||
3236 | return 0; | |
3237 | ||
3238 | reset: | |
3239 | u->invocation_id = SD_ID128_NULL; | |
3240 | u->invocation_id_string[0] = 0; | |
3241 | return r; | |
3242 | } | |
3243 | ||
d219a2b0 LP |
3244 | int unit_set_slice(Unit *u, Unit *slice, UnitDependencyMask mask) { |
3245 | int r; | |
3246 | ||
d79200e2 LP |
3247 | assert(u); |
3248 | assert(slice); | |
3249 | ||
d219a2b0 LP |
3250 | /* Sets the unit slice if it has not been set before. Is extra careful, to only allow this for units |
3251 | * that actually have a cgroup context. Also, we don't allow to set this for slices (since the parent | |
3252 | * slice is derived from the name). Make sure the unit we set is actually a slice. */ | |
d79200e2 LP |
3253 | |
3254 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3255 | return -EOPNOTSUPP; | |
3256 | ||
3257 | if (u->type == UNIT_SLICE) | |
3258 | return -EINVAL; | |
3259 | ||
102ef982 LP |
3260 | if (unit_active_state(u) != UNIT_INACTIVE) |
3261 | return -EBUSY; | |
3262 | ||
d79200e2 LP |
3263 | if (slice->type != UNIT_SLICE) |
3264 | return -EINVAL; | |
3265 | ||
efdb0237 LP |
3266 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
3267 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
3268 | return -EPERM; | |
3269 | ||
12f64221 | 3270 | if (UNIT_GET_SLICE(u) == slice) |
d79200e2 LP |
3271 | return 0; |
3272 | ||
99e66921 | 3273 | /* Disallow slice changes if @u is already bound to cgroups */ |
12f64221 | 3274 | if (UNIT_GET_SLICE(u) && u->cgroup_realized) |
d79200e2 LP |
3275 | return -EBUSY; |
3276 | ||
d219a2b0 LP |
3277 | r = unit_add_dependency(u, UNIT_IN_SLICE, slice, true, mask); |
3278 | if (r < 0) | |
3279 | return r; | |
3280 | ||
d79200e2 LP |
3281 | return 1; |
3282 | } | |
3283 | ||
3284 | int unit_set_default_slice(Unit *u) { | |
a8833944 | 3285 | const char *slice_name; |
a016b922 LP |
3286 | Unit *slice; |
3287 | int r; | |
3288 | ||
3289 | assert(u); | |
3290 | ||
12f64221 | 3291 | if (UNIT_GET_SLICE(u)) |
a016b922 LP |
3292 | return 0; |
3293 | ||
a8833944 LP |
3294 | if (u->instance) { |
3295 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 3296 | |
a8833944 LP |
3297 | /* Implicitly place all instantiated units in their |
3298 | * own per-template slice */ | |
3299 | ||
7410616c LP |
3300 | r = unit_name_to_prefix(u->id, &prefix); |
3301 | if (r < 0) | |
3302 | return r; | |
a8833944 LP |
3303 | |
3304 | /* The prefix is already escaped, but it might include | |
3305 | * "-" which has a special meaning for slice units, | |
3306 | * hence escape it here extra. */ | |
7410616c | 3307 | escaped = unit_name_escape(prefix); |
a8833944 LP |
3308 | if (!escaped) |
3309 | return -ENOMEM; | |
3310 | ||
463d0d15 | 3311 | if (MANAGER_IS_SYSTEM(u->manager)) |
00e7b3c8 | 3312 | slice_name = strjoina("system-", escaped, ".slice"); |
a8833944 | 3313 | else |
7f3b86a4 | 3314 | slice_name = strjoina("app-", escaped, ".slice"); |
5ee24fa0 ZJS |
3315 | |
3316 | } else if (unit_is_extrinsic(u)) | |
3317 | /* Keep all extrinsic units (e.g. perpetual units and swap and mount units in user mode) in | |
3318 | * the root slice. They don't really belong in one of the subslices. */ | |
3319 | slice_name = SPECIAL_ROOT_SLICE; | |
3320 | ||
3321 | else if (MANAGER_IS_SYSTEM(u->manager)) | |
3322 | slice_name = SPECIAL_SYSTEM_SLICE; | |
3323 | else | |
3324 | slice_name = SPECIAL_APP_SLICE; | |
a8833944 LP |
3325 | |
3326 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
3327 | if (r < 0) |
3328 | return r; | |
3329 | ||
d219a2b0 | 3330 | return unit_set_slice(u, slice, UNIT_DEPENDENCY_FILE); |
a016b922 LP |
3331 | } |
3332 | ||
9444b1f2 | 3333 | const char *unit_slice_name(Unit *u) { |
12f64221 | 3334 | Unit *slice; |
9444b1f2 LP |
3335 | assert(u); |
3336 | ||
12f64221 LP |
3337 | slice = UNIT_GET_SLICE(u); |
3338 | if (!slice) | |
9444b1f2 LP |
3339 | return NULL; |
3340 | ||
12f64221 | 3341 | return slice->id; |
9444b1f2 LP |
3342 | } |
3343 | ||
f6ff8c29 | 3344 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 3345 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
3346 | int r; |
3347 | ||
3348 | assert(u); | |
3349 | assert(type); | |
3350 | assert(_found); | |
3351 | ||
7410616c LP |
3352 | r = unit_name_change_suffix(u->id, type, &t); |
3353 | if (r < 0) | |
3354 | return r; | |
3355 | if (unit_has_name(u, t)) | |
3356 | return -EINVAL; | |
f6ff8c29 | 3357 | |
ac155bb8 | 3358 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3359 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3360 | return r; |
3361 | } | |
3362 | ||
bbc29086 | 3363 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
fc67a943 | 3364 | const char *new_owner; |
bbc29086 DM |
3365 | Unit *u = userdata; |
3366 | int r; | |
3367 | ||
3368 | assert(message); | |
3369 | assert(u); | |
3370 | ||
fc67a943 | 3371 | r = sd_bus_message_read(message, "sss", NULL, NULL, &new_owner); |
bbc29086 DM |
3372 | if (r < 0) { |
3373 | bus_log_parse_error(r); | |
3374 | return 0; | |
3375 | } | |
3376 | ||
3377 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3378 | UNIT_VTABLE(u)->bus_name_owner_change(u, empty_to_null(new_owner)); |
a5a8776a MJ |
3379 | |
3380 | return 0; | |
3381 | } | |
3382 | ||
3383 | static int get_name_owner_handler(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
3384 | const sd_bus_error *e; | |
3385 | const char *new_owner; | |
3386 | Unit *u = userdata; | |
3387 | int r; | |
3388 | ||
3389 | assert(message); | |
3390 | assert(u); | |
3391 | ||
3392 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); | |
3393 | ||
a5a8776a | 3394 | e = sd_bus_message_get_error(message); |
a5a8776a | 3395 | if (e) { |
a54654ba LP |
3396 | if (!sd_bus_error_has_name(e, "org.freedesktop.DBus.Error.NameHasNoOwner")) |
3397 | log_unit_error(u, "Unexpected error response from GetNameOwner(): %s", e->message); | |
a5a8776a | 3398 | |
fc67a943 LP |
3399 | new_owner = NULL; |
3400 | } else { | |
3401 | r = sd_bus_message_read(message, "s", &new_owner); | |
3402 | if (r < 0) | |
3403 | return bus_log_parse_error(r); | |
a5a8776a | 3404 | |
fc67a943 LP |
3405 | assert(!isempty(new_owner)); |
3406 | } | |
a5a8776a MJ |
3407 | |
3408 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3409 | UNIT_VTABLE(u)->bus_name_owner_change(u, new_owner); |
bbc29086 DM |
3410 | |
3411 | return 0; | |
3412 | } | |
3413 | ||
9806e87d LP |
3414 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3415 | const char *match; | |
a5b07847 | 3416 | int r; |
bbc29086 | 3417 | |
9806e87d LP |
3418 | assert(u); |
3419 | assert(bus); | |
3420 | assert(name); | |
bbc29086 | 3421 | |
a5b07847 | 3422 | if (u->match_bus_slot || u->get_name_owner_slot) |
bbc29086 DM |
3423 | return -EBUSY; |
3424 | ||
9806e87d | 3425 | match = strjoina("type='signal'," |
81d62103 ZJS |
3426 | "sender='org.freedesktop.DBus'," |
3427 | "path='/org/freedesktop/DBus'," | |
3428 | "interface='org.freedesktop.DBus'," | |
3429 | "member='NameOwnerChanged'," | |
3430 | "arg0='", name, "'"); | |
bbc29086 | 3431 | |
a5b07847 | 3432 | r = sd_bus_add_match_async(bus, &u->match_bus_slot, match, signal_name_owner_changed, NULL, u); |
a5a8776a MJ |
3433 | if (r < 0) |
3434 | return r; | |
3435 | ||
a5b07847 LP |
3436 | r = sd_bus_call_method_async( |
3437 | bus, | |
3438 | &u->get_name_owner_slot, | |
3439 | "org.freedesktop.DBus", | |
3440 | "/org/freedesktop/DBus", | |
3441 | "org.freedesktop.DBus", | |
3442 | "GetNameOwner", | |
3443 | get_name_owner_handler, | |
3444 | u, | |
3445 | "s", name); | |
3446 | if (r < 0) { | |
3447 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3448 | return r; | |
3449 | } | |
3450 | ||
3451 | log_unit_debug(u, "Watching D-Bus name '%s'.", name); | |
3452 | return 0; | |
bbc29086 DM |
3453 | } |
3454 | ||
05e343b7 | 3455 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3456 | int r; |
3457 | ||
05e343b7 LP |
3458 | assert(u); |
3459 | assert(name); | |
3460 | ||
3461 | /* Watch a specific name on the bus. We only support one unit | |
3462 | * watching each name for now. */ | |
3463 | ||
bbc29086 DM |
3464 | if (u->manager->api_bus) { |
3465 | /* If the bus is already available, install the match directly. | |
3466 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3467 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3468 | if (r < 0) |
8ea823b6 | 3469 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3470 | } |
3471 | ||
3472 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3473 | if (r < 0) { | |
3474 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
a5b07847 | 3475 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
bbc29086 DM |
3476 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); |
3477 | } | |
3478 | ||
3479 | return 0; | |
05e343b7 LP |
3480 | } |
3481 | ||
3482 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3483 | assert(u); | |
3484 | assert(name); | |
3485 | ||
8367fea5 | 3486 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3487 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
a5a8776a | 3488 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
05e343b7 LP |
3489 | } |
3490 | ||
d336ba9f | 3491 | int unit_add_node_dependency(Unit *u, const char *what, UnitDependency dep, UnitDependencyMask mask) { |
68eda4bd | 3492 | _cleanup_free_ char *e = NULL; |
44b0d1fd | 3493 | Unit *device; |
6e2ef85b LP |
3494 | int r; |
3495 | ||
3496 | assert(u); | |
3497 | ||
6e2ef85b | 3498 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3499 | if (isempty(what)) |
3500 | return 0; | |
6e2ef85b | 3501 | |
8407a5d0 | 3502 | if (!is_device_path(what)) |
6e2ef85b LP |
3503 | return 0; |
3504 | ||
44b0d1fd | 3505 | /* When device units aren't supported (such as in a container), don't create dependencies on them. */ |
1c2e9646 | 3506 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3507 | return 0; |
3508 | ||
7410616c LP |
3509 | r = unit_name_from_path(what, ".device", &e); |
3510 | if (r < 0) | |
3511 | return r; | |
6e2ef85b | 3512 | |
ac155bb8 | 3513 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3514 | if (r < 0) |
3515 | return r; | |
3516 | ||
ebc8968b FB |
3517 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3518 | dep = UNIT_BINDS_TO; | |
3519 | ||
d336ba9f FB |
3520 | return unit_add_two_dependencies(u, UNIT_AFTER, |
3521 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, | |
3522 | device, true, mask); | |
6e2ef85b | 3523 | } |
a16e1123 | 3524 | |
44b0d1fd LP |
3525 | int unit_add_blockdev_dependency(Unit *u, const char *what, UnitDependencyMask mask) { |
3526 | _cleanup_free_ char *escaped = NULL, *target = NULL; | |
3527 | int r; | |
3528 | ||
3529 | assert(u); | |
3530 | ||
3531 | if (isempty(what)) | |
3532 | return 0; | |
3533 | ||
3534 | if (!path_startswith(what, "/dev/")) | |
3535 | return 0; | |
3536 | ||
3537 | /* If we don't support devices, then also don't bother with blockdev@.target */ | |
3538 | if (!unit_type_supported(UNIT_DEVICE)) | |
3539 | return 0; | |
3540 | ||
3541 | r = unit_name_path_escape(what, &escaped); | |
3542 | if (r < 0) | |
3543 | return r; | |
3544 | ||
3545 | r = unit_name_build("blockdev", escaped, ".target", &target); | |
3546 | if (r < 0) | |
3547 | return r; | |
3548 | ||
3549 | return unit_add_dependency_by_name(u, UNIT_AFTER, target, true, mask); | |
3550 | } | |
3551 | ||
be847e82 | 3552 | int unit_coldplug(Unit *u) { |
05a98afd LP |
3553 | int r = 0, q; |
3554 | char **i; | |
b49e14d5 | 3555 | Job *uj; |
cca098b0 LP |
3556 | |
3557 | assert(u); | |
3558 | ||
f0831ed2 | 3559 | /* Make sure we don't enter a loop, when coldplugging recursively. */ |
f78f265f LP |
3560 | if (u->coldplugged) |
3561 | return 0; | |
3562 | ||
3563 | u->coldplugged = true; | |
3564 | ||
05a98afd LP |
3565 | STRV_FOREACH(i, u->deserialized_refs) { |
3566 | q = bus_unit_track_add_name(u, *i); | |
3567 | if (q < 0 && r >= 0) | |
3568 | r = q; | |
3569 | } | |
3570 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 3571 | |
05a98afd LP |
3572 | if (UNIT_VTABLE(u)->coldplug) { |
3573 | q = UNIT_VTABLE(u)->coldplug(u); | |
3574 | if (q < 0 && r >= 0) | |
3575 | r = q; | |
3576 | } | |
5a6158b6 | 3577 | |
b49e14d5 | 3578 | uj = u->job ?: u->nop_job; |
3579 | if (uj) { | |
3580 | q = job_coldplug(uj); | |
05a98afd LP |
3581 | if (q < 0 && r >= 0) |
3582 | r = q; | |
3583 | } | |
cca098b0 | 3584 | |
05a98afd | 3585 | return r; |
cca098b0 LP |
3586 | } |
3587 | ||
f0831ed2 LP |
3588 | void unit_catchup(Unit *u) { |
3589 | assert(u); | |
3590 | ||
3591 | if (UNIT_VTABLE(u)->catchup) | |
3592 | UNIT_VTABLE(u)->catchup(u); | |
3593 | } | |
3594 | ||
ba25d39e | 3595 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3596 | struct stat st; |
3597 | ||
3598 | if (!path) | |
3599 | return false; | |
3600 | ||
77969722 LP |
3601 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3602 | * are never out-of-date. */ | |
3603 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3604 | return false; | |
3605 | ||
21b95806 ZJS |
3606 | if (stat(path, &st) < 0) |
3607 | /* What, cannot access this anymore? */ | |
3608 | return true; | |
3609 | ||
ba25d39e ZJS |
3610 | if (path_masked) |
3611 | /* For masked files check if they are still so */ | |
3612 | return !null_or_empty(&st); | |
3613 | else | |
3a8db9fe | 3614 | /* For non-empty files check the mtime */ |
87ec20ef | 3615 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3616 | |
3617 | return false; | |
3618 | } | |
3619 | ||
45fb0699 | 3620 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
3621 | _cleanup_strv_free_ char **t = NULL; |
3622 | char **path; | |
1b64d026 | 3623 | |
45fb0699 LP |
3624 | assert(u); |
3625 | ||
ba25d39e ZJS |
3626 | /* For unit files, we allow masking… */ |
3627 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3628 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3629 | return true; |
5f4b19f4 | 3630 | |
ba25d39e ZJS |
3631 | /* Source paths should not be masked… */ |
3632 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3633 | return true; |
ae7a7182 | 3634 | |
19a44dfe LR |
3635 | if (u->load_state == UNIT_LOADED) |
3636 | (void) unit_find_dropin_paths(u, &t); | |
ab932a62 LP |
3637 | if (!strv_equal(u->dropin_paths, t)) |
3638 | return true; | |
6d10d308 | 3639 | |
ba25d39e | 3640 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3641 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3642 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3643 | return true; |
21b95806 | 3644 | |
ab932a62 | 3645 | return false; |
45fb0699 LP |
3646 | } |
3647 | ||
fdf20a31 | 3648 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3649 | assert(u); |
3650 | ||
fdf20a31 MM |
3651 | if (UNIT_VTABLE(u)->reset_failed) |
3652 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 | 3653 | |
7bf081a1 | 3654 | ratelimit_reset(&u->start_ratelimit); |
6bf0f408 | 3655 | u->start_limit_hit = false; |
5632e374 LP |
3656 | } |
3657 | ||
a7f241db LP |
3658 | Unit *unit_following(Unit *u) { |
3659 | assert(u); | |
3660 | ||
3661 | if (UNIT_VTABLE(u)->following) | |
3662 | return UNIT_VTABLE(u)->following(u); | |
3663 | ||
3664 | return NULL; | |
3665 | } | |
3666 | ||
31afa0a4 | 3667 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3668 | assert(u); |
3669 | ||
31afa0a4 LP |
3670 | /* This call does check the current state of the unit. It's |
3671 | * hence useful to be called from state change calls of the | |
3672 | * unit itself, where the state isn't updated yet. This is | |
3673 | * different from unit_inactive_or_pending() which checks both | |
3674 | * the current state and for a queued job. */ | |
18ffdfda | 3675 | |
28a2dfe8 | 3676 | return unit_has_job_type(u, JOB_STOP); |
31afa0a4 LP |
3677 | } |
3678 | ||
3679 | bool unit_inactive_or_pending(Unit *u) { | |
3680 | assert(u); | |
3681 | ||
3682 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3683 | |
d956ac29 LP |
3684 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3685 | return true; | |
3686 | ||
31afa0a4 | 3687 | if (unit_stop_pending(u)) |
18ffdfda LP |
3688 | return true; |
3689 | ||
3690 | return false; | |
3691 | } | |
3692 | ||
31afa0a4 | 3693 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3694 | assert(u); |
3695 | ||
f60c2665 | 3696 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3697 | |
3698 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3699 | return true; | |
3700 | ||
ac155bb8 | 3701 | if (u->job && |
3742095b | 3702 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
3703 | return true; |
3704 | ||
3705 | return false; | |
3706 | } | |
3707 | ||
52a12341 YW |
3708 | bool unit_will_restart_default(Unit *u) { |
3709 | assert(u); | |
3710 | ||
28a2dfe8 | 3711 | return unit_has_job_type(u, JOB_START); |
52a12341 YW |
3712 | } |
3713 | ||
deb4e708 MK |
3714 | bool unit_will_restart(Unit *u) { |
3715 | assert(u); | |
3716 | ||
3717 | if (!UNIT_VTABLE(u)->will_restart) | |
3718 | return false; | |
3719 | ||
3720 | return UNIT_VTABLE(u)->will_restart(u); | |
3721 | } | |
3722 | ||
718db961 | 3723 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3724 | assert(u); |
3725 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 3726 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 3727 | |
8a0867d6 | 3728 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3729 | return -EOPNOTSUPP; |
8a0867d6 | 3730 | |
c74f17d9 | 3731 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3732 | } |
3733 | ||
82659fd7 | 3734 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
af4fa99d | 3735 | _cleanup_set_free_ Set *pid_set = NULL; |
82659fd7 LP |
3736 | int r; |
3737 | ||
d5099efc | 3738 | pid_set = set_new(NULL); |
82659fd7 LP |
3739 | if (!pid_set) |
3740 | return NULL; | |
3741 | ||
3742 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3743 | if (main_pid > 0) { | |
fea72cc0 | 3744 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 | 3745 | if (r < 0) |
95f14a3e | 3746 | return NULL; |
82659fd7 LP |
3747 | } |
3748 | ||
3749 | if (control_pid > 0) { | |
fea72cc0 | 3750 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 | 3751 | if (r < 0) |
95f14a3e | 3752 | return NULL; |
82659fd7 LP |
3753 | } |
3754 | ||
95f14a3e | 3755 | return TAKE_PTR(pid_set); |
82659fd7 LP |
3756 | } |
3757 | ||
d9911002 LP |
3758 | static int kill_common_log(pid_t pid, int signo, void *userdata) { |
3759 | _cleanup_free_ char *comm = NULL; | |
3760 | Unit *u = userdata; | |
3761 | ||
3762 | assert(u); | |
3763 | ||
3764 | (void) get_process_comm(pid, &comm); | |
3765 | log_unit_info(u, "Sending signal SIG%s to process " PID_FMT " (%s) on client request.", | |
3766 | signal_to_string(signo), pid, strna(comm)); | |
3767 | ||
3768 | return 1; | |
3769 | } | |
3770 | ||
d91c34f2 LP |
3771 | int unit_kill_common( |
3772 | Unit *u, | |
3773 | KillWho who, | |
3774 | int signo, | |
3775 | pid_t main_pid, | |
3776 | pid_t control_pid, | |
718db961 | 3777 | sd_bus_error *error) { |
d91c34f2 | 3778 | |
814cc562 | 3779 | int r = 0; |
ac5e3a50 | 3780 | bool killed = false; |
814cc562 | 3781 | |
8aff7ac4 LP |
3782 | /* This is the common implementation for explicit user-requested killing of unit processes, shared by |
3783 | * various unit types. Do not confuse with unit_kill_context(), which is what we use when we want to | |
3784 | * stop a service ourselves. */ | |
3785 | ||
ac5e3a50 | 3786 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3787 | if (main_pid < 0) |
7358dc02 | 3788 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
8aff7ac4 | 3789 | if (main_pid == 0) |
7358dc02 | 3790 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3791 | } |
3792 | ||
ac5e3a50 | 3793 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3794 | if (control_pid < 0) |
7358dc02 | 3795 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
8aff7ac4 | 3796 | if (control_pid == 0) |
7358dc02 | 3797 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3798 | } |
3799 | ||
ac5e3a50 JS |
3800 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3801 | if (control_pid > 0) { | |
d9911002 LP |
3802 | _cleanup_free_ char *comm = NULL; |
3803 | (void) get_process_comm(control_pid, &comm); | |
3804 | ||
3805 | if (kill(control_pid, signo) < 0) { | |
3806 | /* Report this failure both to the logs and to the client */ | |
3807 | sd_bus_error_set_errnof( | |
3808 | error, errno, | |
3809 | "Failed to send signal SIG%s to control process " PID_FMT " (%s): %m", | |
3810 | signal_to_string(signo), control_pid, strna(comm)); | |
3811 | r = log_unit_warning_errno( | |
3812 | u, errno, | |
3813 | "Failed to send signal SIG%s to control process " PID_FMT " (%s) on client request: %m", | |
3814 | signal_to_string(signo), control_pid, strna(comm)); | |
3815 | } else { | |
3816 | log_unit_info(u, "Sent signal SIG%s to control process " PID_FMT " (%s) on client request.", | |
3817 | signal_to_string(signo), control_pid, strna(comm)); | |
ac5e3a50 | 3818 | killed = true; |
d9911002 | 3819 | } |
ac5e3a50 | 3820 | } |
814cc562 | 3821 | |
ac5e3a50 JS |
3822 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3823 | if (main_pid > 0) { | |
d9911002 LP |
3824 | _cleanup_free_ char *comm = NULL; |
3825 | (void) get_process_comm(main_pid, &comm); | |
3826 | ||
3827 | if (kill(main_pid, signo) < 0) { | |
3828 | if (r == 0) | |
3829 | sd_bus_error_set_errnof( | |
3830 | error, errno, | |
3831 | "Failed to send signal SIG%s to main process " PID_FMT " (%s): %m", | |
3832 | signal_to_string(signo), main_pid, strna(comm)); | |
3833 | ||
3834 | r = log_unit_warning_errno( | |
3835 | u, errno, | |
3836 | "Failed to send signal SIG%s to main process " PID_FMT " (%s) on client request: %m", | |
3837 | signal_to_string(signo), main_pid, strna(comm)); | |
3838 | } else { | |
3839 | log_unit_info(u, "Sent signal SIG%s to main process " PID_FMT " (%s) on client request.", | |
3840 | signal_to_string(signo), main_pid, strna(comm)); | |
ac5e3a50 | 3841 | killed = true; |
d9911002 | 3842 | } |
ac5e3a50 | 3843 | } |
814cc562 | 3844 | |
ac5e3a50 | 3845 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3846 | _cleanup_set_free_ Set *pid_set = NULL; |
3847 | int q; | |
3848 | ||
82659fd7 LP |
3849 | /* Exclude the main/control pids from being killed via the cgroup */ |
3850 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 | 3851 | if (!pid_set) |
d9911002 LP |
3852 | return log_oom(); |
3853 | ||
3854 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, kill_common_log, u); | |
3855 | if (q < 0) { | |
3856 | if (!IN_SET(q, -ESRCH, -ENOENT)) { | |
3857 | if (r == 0) | |
3858 | sd_bus_error_set_errnof( | |
3859 | error, q, | |
3860 | "Failed to send signal SIG%s to auxiliary processes: %m", | |
3861 | signal_to_string(signo)); | |
3862 | ||
3863 | r = log_unit_warning_errno( | |
3864 | u, q, | |
3865 | "Failed to send signal SIG%s to auxiliary processes on client request: %m", | |
3866 | signal_to_string(signo)); | |
3867 | } | |
3868 | } else | |
ac5e3a50 | 3869 | killed = true; |
814cc562 MS |
3870 | } |
3871 | ||
2ae0508e LP |
3872 | /* If the "fail" versions of the operation are requested, then complain if the set of processes we killed is empty */ |
3873 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL, KILL_MAIN_FAIL)) | |
3874 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No matching processes to kill"); | |
ac5e3a50 | 3875 | |
814cc562 MS |
3876 | return r; |
3877 | } | |
3878 | ||
6210e7fc LP |
3879 | int unit_following_set(Unit *u, Set **s) { |
3880 | assert(u); | |
3881 | assert(s); | |
3882 | ||
3883 | if (UNIT_VTABLE(u)->following_set) | |
3884 | return UNIT_VTABLE(u)->following_set(u, s); | |
3885 | ||
3886 | *s = NULL; | |
3887 | return 0; | |
3888 | } | |
3889 | ||
a4375746 | 3890 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
3891 | int r; |
3892 | ||
a4375746 LP |
3893 | assert(u); |
3894 | ||
0ec0deaa LP |
3895 | if (u->unit_file_state < 0 && u->fragment_path) { |
3896 | r = unit_file_get_state( | |
463d0d15 | 3897 | u->manager->unit_file_scope, |
0ec0deaa | 3898 | NULL, |
9ea3a0e7 | 3899 | u->id, |
0ec0deaa LP |
3900 | &u->unit_file_state); |
3901 | if (r < 0) | |
3902 | u->unit_file_state = UNIT_FILE_BAD; | |
3903 | } | |
a4375746 | 3904 | |
ac155bb8 | 3905 | return u->unit_file_state; |
a4375746 LP |
3906 | } |
3907 | ||
d2dc52db LP |
3908 | int unit_get_unit_file_preset(Unit *u) { |
3909 | assert(u); | |
3910 | ||
3911 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3912 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 3913 | u->manager->unit_file_scope, |
0ec0deaa | 3914 | NULL, |
8f7b2566 ZJS |
3915 | basename(u->fragment_path), |
3916 | NULL); | |
d2dc52db LP |
3917 | |
3918 | return u->unit_file_preset; | |
3919 | } | |
3920 | ||
7f7d01ed | 3921 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 3922 | assert(ref); |
7f7d01ed ZJS |
3923 | assert(source); |
3924 | assert(target); | |
57020a3a | 3925 | |
7f7d01ed | 3926 | if (ref->target) |
57020a3a LP |
3927 | unit_ref_unset(ref); |
3928 | ||
7f7d01ed ZJS |
3929 | ref->source = source; |
3930 | ref->target = target; | |
3931 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
3932 | return target; | |
57020a3a LP |
3933 | } |
3934 | ||
3935 | void unit_ref_unset(UnitRef *ref) { | |
3936 | assert(ref); | |
3937 | ||
7f7d01ed | 3938 | if (!ref->target) |
57020a3a LP |
3939 | return; |
3940 | ||
b75102e5 LP |
3941 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
3942 | * be unreferenced now. */ | |
7f7d01ed | 3943 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 3944 | |
7f7d01ed ZJS |
3945 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
3946 | ref->source = ref->target = NULL; | |
57020a3a LP |
3947 | } |
3948 | ||
29206d46 LP |
3949 | static int user_from_unit_name(Unit *u, char **ret) { |
3950 | ||
3951 | static const uint8_t hash_key[] = { | |
3952 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
3953 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
3954 | }; | |
3955 | ||
3956 | _cleanup_free_ char *n = NULL; | |
3957 | int r; | |
3958 | ||
3959 | r = unit_name_to_prefix(u->id, &n); | |
3960 | if (r < 0) | |
3961 | return r; | |
3962 | ||
7a8867ab | 3963 | if (valid_user_group_name(n, 0)) { |
ae2a15bc | 3964 | *ret = TAKE_PTR(n); |
29206d46 LP |
3965 | return 0; |
3966 | } | |
3967 | ||
3968 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
3969 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
3970 | return -ENOMEM; | |
3971 | ||
3972 | return 0; | |
3973 | } | |
3974 | ||
598459ce LP |
3975 | int unit_patch_contexts(Unit *u) { |
3976 | CGroupContext *cc; | |
3977 | ExecContext *ec; | |
cba6e062 LP |
3978 | int r; |
3979 | ||
e06c73cc | 3980 | assert(u); |
e06c73cc | 3981 | |
598459ce LP |
3982 | /* Patch in the manager defaults into the exec and cgroup |
3983 | * contexts, _after_ the rest of the settings have been | |
3984 | * initialized */ | |
085afe36 | 3985 | |
598459ce LP |
3986 | ec = unit_get_exec_context(u); |
3987 | if (ec) { | |
3988 | /* This only copies in the ones that need memory */ | |
12375b95 | 3989 | for (unsigned i = 0; i < _RLIMIT_MAX; i++) |
598459ce LP |
3990 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { |
3991 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
3992 | if (!ec->rlimit[i]) | |
3993 | return -ENOMEM; | |
3994 | } | |
3995 | ||
463d0d15 | 3996 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
3997 | !ec->working_directory) { |
3998 | ||
3999 | r = get_home_dir(&ec->working_directory); | |
4000 | if (r < 0) | |
4001 | return r; | |
4c08c824 LP |
4002 | |
4003 | /* Allow user services to run, even if the | |
4004 | * home directory is missing */ | |
4005 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4006 | } |
4007 | ||
598459ce | 4008 | if (ec->private_devices) |
2cd0a735 | 4009 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4010 | |
4011 | if (ec->protect_kernel_modules) | |
4012 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 | 4013 | |
84703040 KK |
4014 | if (ec->protect_kernel_logs) |
4015 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYSLOG); | |
4016 | ||
fc64760d KK |
4017 | if (ec->protect_clock) |
4018 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_SYS_TIME) | (UINT64_C(1) << CAP_WAKE_ALARM)); | |
4019 | ||
29206d46 LP |
4020 | if (ec->dynamic_user) { |
4021 | if (!ec->user) { | |
4022 | r = user_from_unit_name(u, &ec->user); | |
4023 | if (r < 0) | |
4024 | return r; | |
4025 | } | |
4026 | ||
4027 | if (!ec->group) { | |
4028 | ec->group = strdup(ec->user); | |
4029 | if (!ec->group) | |
4030 | return -ENOMEM; | |
4031 | } | |
4032 | ||
bf65b7e0 LP |
4033 | /* If the dynamic user option is on, let's make sure that the unit can't leave its |
4034 | * UID/GID around in the file system or on IPC objects. Hence enforce a strict | |
4035 | * sandbox. */ | |
63bb64a0 | 4036 | |
29206d46 | 4037 | ec->private_tmp = true; |
00d9ef85 | 4038 | ec->remove_ipc = true; |
63bb64a0 LP |
4039 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4040 | if (ec->protect_home == PROTECT_HOME_NO) | |
4041 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
bf65b7e0 LP |
4042 | |
4043 | /* Make sure this service can neither benefit from SUID/SGID binaries nor create | |
4044 | * them. */ | |
4045 | ec->no_new_privileges = true; | |
4046 | ec->restrict_suid_sgid = true; | |
29206d46 | 4047 | } |
cba6e062 LP |
4048 | } |
4049 | ||
598459ce | 4050 | cc = unit_get_cgroup_context(u); |
fe65e88b | 4051 | if (cc && ec) { |
f513e420 | 4052 | |
fe65e88b | 4053 | if (ec->private_devices && |
084870f9 ZJS |
4054 | cc->device_policy == CGROUP_DEVICE_POLICY_AUTO) |
4055 | cc->device_policy = CGROUP_DEVICE_POLICY_CLOSED; | |
fe65e88b | 4056 | |
b3d13314 | 4057 | if ((ec->root_image || !LIST_IS_EMPTY(ec->mount_images)) && |
084870f9 | 4058 | (cc->device_policy != CGROUP_DEVICE_POLICY_AUTO || cc->device_allow)) { |
0cffae95 | 4059 | const char *p; |
fe65e88b | 4060 | |
b3d13314 | 4061 | /* When RootImage= or MountImages= is specified, the following devices are touched. */ |
0cffae95 LB |
4062 | FOREACH_STRING(p, "/dev/loop-control", "/dev/mapper/control") { |
4063 | r = cgroup_add_device_allow(cc, p, "rw"); | |
4064 | if (r < 0) | |
4065 | return r; | |
4066 | } | |
4067 | FOREACH_STRING(p, "block-loop", "block-blkext", "block-device-mapper") { | |
4068 | r = cgroup_add_device_allow(cc, p, "rwm"); | |
4069 | if (r < 0) | |
4070 | return r; | |
4071 | } | |
867af728 | 4072 | |
0cffae95 LB |
4073 | /* Make sure "block-loop" can be resolved, i.e. make sure "loop" shows up in /proc/devices. |
4074 | * Same for mapper and verity. */ | |
4075 | FOREACH_STRING(p, "modprobe@loop.service", "modprobe@dm_mod.service", "modprobe@dm_verity.service") { | |
4076 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, p, true, UNIT_DEPENDENCY_FILE); | |
4077 | if (r < 0) | |
4078 | return r; | |
4079 | } | |
fe65e88b | 4080 | } |
fc64760d KK |
4081 | |
4082 | if (ec->protect_clock) { | |
4083 | r = cgroup_add_device_allow(cc, "char-rtc", "r"); | |
4084 | if (r < 0) | |
4085 | return r; | |
4086 | } | |
598459ce | 4087 | } |
f1660f96 | 4088 | |
cba6e062 | 4089 | return 0; |
e06c73cc LP |
4090 | } |
4091 | ||
c2503e35 | 4092 | ExecContext *unit_get_exec_context(const Unit *u) { |
3ef63c31 LP |
4093 | size_t offset; |
4094 | assert(u); | |
4095 | ||
598459ce LP |
4096 | if (u->type < 0) |
4097 | return NULL; | |
4098 | ||
3ef63c31 LP |
4099 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4100 | if (offset <= 0) | |
4101 | return NULL; | |
4102 | ||
4103 | return (ExecContext*) ((uint8_t*) u + offset); | |
4104 | } | |
4105 | ||
718db961 LP |
4106 | KillContext *unit_get_kill_context(Unit *u) { |
4107 | size_t offset; | |
4108 | assert(u); | |
4109 | ||
598459ce LP |
4110 | if (u->type < 0) |
4111 | return NULL; | |
4112 | ||
718db961 LP |
4113 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4114 | if (offset <= 0) | |
4115 | return NULL; | |
4116 | ||
4117 | return (KillContext*) ((uint8_t*) u + offset); | |
4118 | } | |
4119 | ||
4ad49000 LP |
4120 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4121 | size_t offset; | |
4122 | ||
598459ce LP |
4123 | if (u->type < 0) |
4124 | return NULL; | |
4125 | ||
4ad49000 LP |
4126 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4127 | if (offset <= 0) | |
4128 | return NULL; | |
4129 | ||
4130 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4131 | } | |
4132 | ||
613b411c LP |
4133 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4134 | size_t offset; | |
4135 | ||
598459ce LP |
4136 | if (u->type < 0) |
4137 | return NULL; | |
4138 | ||
613b411c LP |
4139 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4140 | if (offset <= 0) | |
4141 | return NULL; | |
4142 | ||
4143 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4144 | } | |
4145 | ||
2e59b241 | 4146 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4147 | assert(u); |
4148 | ||
2e59b241 | 4149 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4150 | return NULL; |
4151 | ||
39591351 LP |
4152 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4153 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4154 | |
2e59b241 | 4155 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4156 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4157 | |
2e59b241 LP |
4158 | if (flags & UNIT_RUNTIME) |
4159 | return u->manager->lookup_paths.runtime_control; | |
4160 | ||
39591351 | 4161 | return NULL; |
71645aca LP |
4162 | } |
4163 | ||
2e59b241 LP |
4164 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4165 | char *ret = NULL; | |
4166 | ||
4167 | if (!s) | |
4168 | return NULL; | |
4169 | ||
4170 | /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated | |
4171 | * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is | |
4172 | * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly | |
4173 | * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is | |
4174 | * not specified, then the return value always needs to be freed. Callers can use this to optimize memory | |
4175 | * allocations. */ | |
4176 | ||
4177 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
4178 | ret = specifier_escape(s); | |
4179 | if (!ret) | |
4180 | return NULL; | |
4181 | ||
4182 | s = ret; | |
4183 | } | |
4184 | ||
4185 | if (flags & UNIT_ESCAPE_C) { | |
4186 | char *a; | |
4187 | ||
4188 | a = cescape(s); | |
4189 | free(ret); | |
4190 | if (!a) | |
4191 | return NULL; | |
4192 | ||
4193 | ret = a; | |
4194 | } | |
4195 | ||
4196 | if (buf) { | |
4197 | *buf = ret; | |
4198 | return ret ?: (char*) s; | |
4199 | } | |
4200 | ||
4201 | return ret ?: strdup(s); | |
4202 | } | |
4203 | ||
4204 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4205 | _cleanup_free_ char *result = NULL; | |
319a4f4b | 4206 | size_t n = 0; |
ae2a15bc | 4207 | char **i; |
2e59b241 LP |
4208 | |
4209 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a | |
4210 | * way suitable for ExecStart= stanzas */ | |
4211 | ||
4212 | STRV_FOREACH(i, l) { | |
4213 | _cleanup_free_ char *buf = NULL; | |
4214 | const char *p; | |
4215 | size_t a; | |
4216 | char *q; | |
4217 | ||
4218 | p = unit_escape_setting(*i, flags, &buf); | |
4219 | if (!p) | |
4220 | return NULL; | |
4221 | ||
4222 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
319a4f4b | 4223 | if (!GREEDY_REALLOC(result, n + a + 1)) |
2e59b241 LP |
4224 | return NULL; |
4225 | ||
4226 | q = result + n; | |
4227 | if (n > 0) | |
4228 | *(q++) = ' '; | |
4229 | ||
4230 | *(q++) = '"'; | |
4231 | q = stpcpy(q, p); | |
4232 | *(q++) = '"'; | |
4233 | ||
4234 | n += a; | |
4235 | } | |
4236 | ||
319a4f4b | 4237 | if (!GREEDY_REALLOC(result, n + 1)) |
2e59b241 LP |
4238 | return NULL; |
4239 | ||
4240 | result[n] = 0; | |
4241 | ||
ae2a15bc | 4242 | return TAKE_PTR(result); |
2e59b241 LP |
4243 | } |
4244 | ||
4245 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4246 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4247 | const char *dir, *wrapped; |
26d04f86 | 4248 | int r; |
71645aca LP |
4249 | |
4250 | assert(u); | |
2e59b241 LP |
4251 | assert(name); |
4252 | assert(data); | |
4253 | ||
4254 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4255 | return 0; | |
4256 | ||
4257 | data = unit_escape_setting(data, flags, &escaped); | |
4258 | if (!data) | |
4259 | return -ENOMEM; | |
4260 | ||
4261 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4262 | * previous section header is the same */ | |
4263 | ||
4264 | if (flags & UNIT_PRIVATE) { | |
4265 | if (!UNIT_VTABLE(u)->private_section) | |
4266 | return -EINVAL; | |
4267 | ||
4268 | if (!u->transient_file || u->last_section_private < 0) | |
4269 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4270 | else if (u->last_section_private == 0) | |
4271 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4272 | } else { | |
4273 | if (!u->transient_file || u->last_section_private < 0) | |
4274 | data = strjoina("[Unit]\n", data); | |
4275 | else if (u->last_section_private > 0) | |
4276 | data = strjoina("\n[Unit]\n", data); | |
4277 | } | |
71645aca | 4278 | |
4f4afc88 LP |
4279 | if (u->transient_file) { |
4280 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4281 | * write to the transient unit file. */ | |
4282 | fputs(data, u->transient_file); | |
4f4afc88 | 4283 | |
2e59b241 LP |
4284 | if (!endswith(data, "\n")) |
4285 | fputc('\n', u->transient_file); | |
4286 | ||
4287 | /* Remember which section we wrote this entry to */ | |
4288 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4289 | return 0; |
2e59b241 | 4290 | } |
8e2af478 | 4291 | |
2e59b241 | 4292 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4293 | if (!dir) |
4294 | return -EINVAL; | |
71645aca | 4295 | |
2a9a6f8a | 4296 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4297 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4298 | data, |
4299 | "\n"); | |
e20b2a86 | 4300 | |
815b09d3 | 4301 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4302 | if (r < 0) |
4303 | return r; | |
4304 | ||
45639f1b | 4305 | (void) mkdir_p_label(p, 0755); |
4dba44a5 ZJS |
4306 | |
4307 | /* Make sure the drop-in dir is registered in our path cache. This way we don't need to stupidly | |
4308 | * recreate the cache after every drop-in we write. */ | |
4309 | if (u->manager->unit_path_cache) { | |
be327321 | 4310 | r = set_put_strdup(&u->manager->unit_path_cache, p); |
4dba44a5 ZJS |
4311 | if (r < 0) |
4312 | return r; | |
4313 | } | |
4314 | ||
2a9a6f8a | 4315 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4316 | if (r < 0) |
4317 | return r; | |
4318 | ||
815b09d3 | 4319 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4320 | if (r < 0) |
4321 | return r; | |
815b09d3 | 4322 | q = NULL; |
adb76a70 | 4323 | |
adb76a70 WC |
4324 | strv_uniq(u->dropin_paths); |
4325 | ||
4326 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4327 | ||
4328 | return 0; | |
26d04f86 | 4329 | } |
71645aca | 4330 | |
2e59b241 | 4331 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4332 | _cleanup_free_ char *p = NULL; |
4333 | va_list ap; | |
4334 | int r; | |
4335 | ||
4336 | assert(u); | |
4337 | assert(name); | |
4338 | assert(format); | |
4339 | ||
2e59b241 | 4340 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4341 | return 0; |
4342 | ||
4343 | va_start(ap, format); | |
4344 | r = vasprintf(&p, format, ap); | |
4345 | va_end(ap); | |
4346 | ||
4347 | if (r < 0) | |
4348 | return -ENOMEM; | |
4349 | ||
2e59b241 | 4350 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4351 | } |
71645aca | 4352 | |
c2756a68 | 4353 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4354 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4355 | FILE *f; |
4f4afc88 | 4356 | |
c2756a68 LP |
4357 | assert(u); |
4358 | ||
3f5e8115 LP |
4359 | if (!UNIT_VTABLE(u)->can_transient) |
4360 | return -EOPNOTSUPP; | |
4361 | ||
45639f1b LP |
4362 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4363 | ||
657ee2d8 | 4364 | path = path_join(u->manager->lookup_paths.transient, u->id); |
4f4afc88 LP |
4365 | if (!path) |
4366 | return -ENOMEM; | |
4367 | ||
4368 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4369 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4370 | ||
78e334b5 | 4371 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 4372 | f = fopen(path, "we"); |
0126c8f3 | 4373 | if (!f) |
78e334b5 | 4374 | return -errno; |
4f4afc88 LP |
4375 | } |
4376 | ||
0126c8f3 | 4377 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4378 | u->transient_file = f; |
4379 | ||
0126c8f3 | 4380 | free_and_replace(u->fragment_path, path); |
7c65093a | 4381 | |
7c65093a LP |
4382 | u->source_path = mfree(u->source_path); |
4383 | u->dropin_paths = strv_free(u->dropin_paths); | |
4384 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4385 | ||
4f4afc88 LP |
4386 | u->load_state = UNIT_STUB; |
4387 | u->load_error = 0; | |
4388 | u->transient = true; | |
4389 | ||
7c65093a LP |
4390 | unit_add_to_dbus_queue(u); |
4391 | unit_add_to_gc_queue(u); | |
c2756a68 | 4392 | |
4f4afc88 LP |
4393 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4394 | u->transient_file); | |
4395 | ||
3f5e8115 | 4396 | return 0; |
c2756a68 LP |
4397 | } |
4398 | ||
c53d2d54 | 4399 | static int log_kill(pid_t pid, int sig, void *userdata) { |
1d98fef1 LP |
4400 | _cleanup_free_ char *comm = NULL; |
4401 | ||
4402 | (void) get_process_comm(pid, &comm); | |
4403 | ||
4404 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4405 | only, like for example systemd's own PAM stub process. */ | |
4406 | if (comm && comm[0] == '(') | |
c53d2d54 | 4407 | return 0; |
1d98fef1 LP |
4408 | |
4409 | log_unit_notice(userdata, | |
4410 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4411 | pid, | |
4412 | strna(comm), | |
4413 | signal_to_string(sig)); | |
c53d2d54 DB |
4414 | |
4415 | return 1; | |
1d98fef1 LP |
4416 | } |
4417 | ||
4ab1670f | 4418 | static int operation_to_signal(const KillContext *c, KillOperation k, bool *noteworthy) { |
1d98fef1 LP |
4419 | assert(c); |
4420 | ||
4421 | switch (k) { | |
4422 | ||
4423 | case KILL_TERMINATE: | |
4424 | case KILL_TERMINATE_AND_LOG: | |
4ab1670f | 4425 | *noteworthy = false; |
1d98fef1 LP |
4426 | return c->kill_signal; |
4427 | ||
a232ebcc | 4428 | case KILL_RESTART: |
4ab1670f | 4429 | *noteworthy = false; |
a232ebcc ZJS |
4430 | return restart_kill_signal(c); |
4431 | ||
1d98fef1 | 4432 | case KILL_KILL: |
4ab1670f | 4433 | *noteworthy = true; |
fbb48d4c | 4434 | return c->final_kill_signal; |
1d98fef1 | 4435 | |
c87700a1 | 4436 | case KILL_WATCHDOG: |
4ab1670f | 4437 | *noteworthy = true; |
c87700a1 | 4438 | return c->watchdog_signal; |
1d98fef1 LP |
4439 | |
4440 | default: | |
4441 | assert_not_reached("KillOperation unknown"); | |
4442 | } | |
4443 | } | |
4444 | ||
cd2086fe LP |
4445 | int unit_kill_context( |
4446 | Unit *u, | |
4447 | KillContext *c, | |
db2cb23b | 4448 | KillOperation k, |
cd2086fe LP |
4449 | pid_t main_pid, |
4450 | pid_t control_pid, | |
4451 | bool main_pid_alien) { | |
4452 | ||
1d98fef1 | 4453 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4454 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4455 | int sig, r; |
cd2086fe LP |
4456 | |
4457 | assert(u); | |
4458 | assert(c); | |
4459 | ||
8aff7ac4 LP |
4460 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. Returns > 0 |
4461 | * if we killed something worth waiting for, 0 otherwise. Do not confuse with unit_kill_common() | |
4462 | * which is used for user-requested killing of unit processes. */ | |
1d98fef1 | 4463 | |
cd2086fe LP |
4464 | if (c->kill_mode == KILL_NONE) |
4465 | return 0; | |
4466 | ||
4ab1670f ZJS |
4467 | bool noteworthy; |
4468 | sig = operation_to_signal(c, k, ¬eworthy); | |
4469 | if (noteworthy) | |
4470 | log_func = log_kill; | |
1d98fef1 LP |
4471 | |
4472 | send_sighup = | |
4473 | c->send_sighup && | |
4474 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4475 | sig != SIGHUP; | |
4476 | ||
cd2086fe | 4477 | if (main_pid > 0) { |
1d98fef1 LP |
4478 | if (log_func) |
4479 | log_func(main_pid, sig, u); | |
cd2086fe | 4480 | |
1d98fef1 | 4481 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4482 | if (r < 0 && r != -ESRCH) { |
4483 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4484 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 4485 | |
b821a397 | 4486 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 4487 | } else { |
bc6aed7b LP |
4488 | if (!main_pid_alien) |
4489 | wait_for_exit = true; | |
82659fd7 | 4490 | |
1d98fef1 | 4491 | if (r != -ESRCH && send_sighup) |
d0667321 | 4492 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 4493 | } |
cd2086fe LP |
4494 | } |
4495 | ||
4496 | if (control_pid > 0) { | |
1d98fef1 LP |
4497 | if (log_func) |
4498 | log_func(control_pid, sig, u); | |
cd2086fe | 4499 | |
1d98fef1 | 4500 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4501 | if (r < 0 && r != -ESRCH) { |
4502 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4503 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 4504 | |
b821a397 | 4505 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 4506 | } else { |
cd2086fe | 4507 | wait_for_exit = true; |
82659fd7 | 4508 | |
1d98fef1 | 4509 | if (r != -ESRCH && send_sighup) |
d0667321 | 4510 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 4511 | } |
cd2086fe LP |
4512 | } |
4513 | ||
b821a397 LP |
4514 | if (u->cgroup_path && |
4515 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4516 | _cleanup_set_free_ Set *pid_set = NULL; |
4517 | ||
82659fd7 LP |
4518 | /* Exclude the main/control pids from being killed via the cgroup */ |
4519 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4520 | if (!pid_set) |
4521 | return -ENOMEM; | |
4522 | ||
1d98fef1 LP |
4523 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4524 | sig, | |
4525 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4526 | pid_set, | |
4527 | log_func, u); | |
cd2086fe | 4528 | if (r < 0) { |
4c701096 | 4529 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
b821a397 LP |
4530 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
4531 | ||
82659fd7 | 4532 | } else if (r > 0) { |
bc6aed7b | 4533 | |
1d9cc876 LP |
4534 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4535 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
4536 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
4537 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
4538 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
4539 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 4540 | |
c22800e4 | 4541 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 4542 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 4543 | wait_for_exit = true; |
58ea275a | 4544 | |
1d98fef1 | 4545 | if (send_sighup) { |
82659fd7 LP |
4546 | set_free(pid_set); |
4547 | ||
4548 | pid_set = unit_pid_set(main_pid, control_pid); | |
4549 | if (!pid_set) | |
4550 | return -ENOMEM; | |
4551 | ||
c8aa4b5b LP |
4552 | (void) cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4553 | SIGHUP, | |
4554 | CGROUP_IGNORE_SELF, | |
4555 | pid_set, | |
4556 | NULL, NULL); | |
82659fd7 LP |
4557 | } |
4558 | } | |
cd2086fe LP |
4559 | } |
4560 | ||
4561 | return wait_for_exit; | |
4562 | } | |
4563 | ||
eef85c4a | 4564 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
ca8700e9 | 4565 | _cleanup_free_ char *p = NULL; |
eef85c4a | 4566 | UnitDependencyInfo di; |
a57f7e2c LP |
4567 | int r; |
4568 | ||
4569 | assert(u); | |
4570 | assert(path); | |
4571 | ||
eef85c4a LP |
4572 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in |
4573 | * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to | |
4574 | * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily | |
4575 | * determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4576 | |
70b64bd3 ZJS |
4577 | if (!path_is_absolute(path)) |
4578 | return -EINVAL; | |
4579 | ||
548f6937 | 4580 | r = hashmap_ensure_allocated(&u->requires_mounts_for, &path_hash_ops); |
eef85c4a LP |
4581 | if (r < 0) |
4582 | return r; | |
4583 | ||
a57f7e2c LP |
4584 | p = strdup(path); |
4585 | if (!p) | |
4586 | return -ENOMEM; | |
4587 | ||
4ff361cc | 4588 | path = path_simplify(p); |
a57f7e2c | 4589 | |
ca8700e9 | 4590 | if (!path_is_normalized(path)) |
a57f7e2c | 4591 | return -EPERM; |
a57f7e2c | 4592 | |
ca8700e9 | 4593 | if (hashmap_contains(u->requires_mounts_for, path)) |
a57f7e2c | 4594 | return 0; |
a57f7e2c | 4595 | |
eef85c4a LP |
4596 | di = (UnitDependencyInfo) { |
4597 | .origin_mask = mask | |
4598 | }; | |
4599 | ||
ca8700e9 ZJS |
4600 | r = hashmap_put(u->requires_mounts_for, path, di.data); |
4601 | if (r < 0) | |
a57f7e2c | 4602 | return r; |
ca8700e9 | 4603 | p = NULL; |
a57f7e2c | 4604 | |
4cb06c59 | 4605 | char prefix[strlen(path) + 1]; |
ca8700e9 | 4606 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
a57f7e2c LP |
4607 | Set *x; |
4608 | ||
4609 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4610 | if (!x) { | |
ca8700e9 | 4611 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 4612 | |
548f6937 | 4613 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
742f41ad LP |
4614 | if (r < 0) |
4615 | return r; | |
a57f7e2c LP |
4616 | |
4617 | q = strdup(prefix); | |
4618 | if (!q) | |
4619 | return -ENOMEM; | |
4620 | ||
d5099efc | 4621 | x = set_new(NULL); |
ca8700e9 | 4622 | if (!x) |
a57f7e2c | 4623 | return -ENOMEM; |
a57f7e2c LP |
4624 | |
4625 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4626 | if (r < 0) { | |
a57f7e2c LP |
4627 | set_free(x); |
4628 | return r; | |
4629 | } | |
ca8700e9 | 4630 | q = NULL; |
a57f7e2c LP |
4631 | } |
4632 | ||
4633 | r = set_put(x, u); | |
4634 | if (r < 0) | |
4635 | return r; | |
4636 | } | |
4637 | ||
4638 | return 0; | |
4639 | } | |
4640 | ||
613b411c LP |
4641 | int unit_setup_exec_runtime(Unit *u) { |
4642 | ExecRuntime **rt; | |
4643 | size_t offset; | |
613b411c | 4644 | Unit *other; |
e8a565cb | 4645 | int r; |
613b411c LP |
4646 | |
4647 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4648 | assert(offset > 0); | |
4649 | ||
06b643e7 | 4650 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
4651 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
4652 | if (*rt) | |
4653 | return 0; | |
4654 | ||
4655 | /* Try to get it from somebody else */ | |
15ed3c3a | 4656 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_JOINS_NAMESPACE_OF) { |
e8a565cb YW |
4657 | r = exec_runtime_acquire(u->manager, NULL, other->id, false, rt); |
4658 | if (r == 1) | |
4659 | return 1; | |
613b411c LP |
4660 | } |
4661 | ||
e8a565cb | 4662 | return exec_runtime_acquire(u->manager, unit_get_exec_context(u), u->id, true, rt); |
613b411c LP |
4663 | } |
4664 | ||
29206d46 LP |
4665 | int unit_setup_dynamic_creds(Unit *u) { |
4666 | ExecContext *ec; | |
4667 | DynamicCreds *dcreds; | |
4668 | size_t offset; | |
4669 | ||
4670 | assert(u); | |
4671 | ||
4672 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
4673 | assert(offset > 0); | |
4674 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
4675 | ||
4676 | ec = unit_get_exec_context(u); | |
4677 | assert(ec); | |
4678 | ||
4679 | if (!ec->dynamic_user) | |
4680 | return 0; | |
4681 | ||
4682 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
4683 | } | |
4684 | ||
1c2e9646 LP |
4685 | bool unit_type_supported(UnitType t) { |
4686 | if (_unlikely_(t < 0)) | |
4687 | return false; | |
4688 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
4689 | return false; | |
4690 | ||
4691 | if (!unit_vtable[t]->supported) | |
4692 | return true; | |
4693 | ||
4694 | return unit_vtable[t]->supported(); | |
4695 | } | |
4696 | ||
8b4305c7 LP |
4697 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
4698 | int r; | |
4699 | ||
4700 | assert(u); | |
4701 | assert(where); | |
4702 | ||
c2503e35 RH |
4703 | if (!unit_log_level_test(u, LOG_NOTICE)) |
4704 | return; | |
4705 | ||
8b4305c7 | 4706 | r = dir_is_empty(where); |
3f602115 | 4707 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
4708 | return; |
4709 | if (r < 0) { | |
4710 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
4711 | return; | |
4712 | } | |
4713 | ||
c2503e35 RH |
4714 | log_unit_struct(u, LOG_NOTICE, |
4715 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
4716 | LOG_UNIT_INVOCATION_ID(u), | |
4717 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
4718 | "WHERE=%s", where); | |
8b4305c7 LP |
4719 | } |
4720 | ||
25cd4964 | 4721 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
58d9d89b | 4722 | _cleanup_free_ char *canonical_where = NULL; |
8b4305c7 LP |
4723 | int r; |
4724 | ||
4725 | assert(u); | |
4726 | assert(where); | |
4727 | ||
a5648b80 | 4728 | r = chase_symlinks(where, NULL, CHASE_NONEXISTENT, &canonical_where, NULL); |
8b4305c7 | 4729 | if (r < 0) { |
25cd4964 | 4730 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
4731 | return 0; |
4732 | } | |
25cd4964 AJ |
4733 | |
4734 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
4735 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
4736 | return 0; |
4737 | ||
25cd4964 | 4738 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
c2503e35 RH |
4739 | log_unit_struct(u, LOG_ERR, |
4740 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
4741 | LOG_UNIT_INVOCATION_ID(u), | |
4742 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), | |
4743 | "WHERE=%s", where); | |
8b4305c7 LP |
4744 | |
4745 | return -ELOOP; | |
4746 | } | |
0f13f3bd LP |
4747 | |
4748 | bool unit_is_pristine(Unit *u) { | |
4749 | assert(u); | |
4750 | ||
7c65093a | 4751 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
4752 | * in a number of different ways. Note that to cater for unit |
4753 | * types such as slice, we are generally fine with units that | |
e9e8cbc8 ZJS |
4754 | * are marked UNIT_LOADED even though nothing was actually |
4755 | * loaded, as those unit types don't require a file on disk. */ | |
0f13f3bd LP |
4756 | |
4757 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
4758 | u->fragment_path || | |
4759 | u->source_path || | |
4760 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
4761 | u->job || |
4762 | u->merged_into); | |
4763 | } | |
291d565a LP |
4764 | |
4765 | pid_t unit_control_pid(Unit *u) { | |
4766 | assert(u); | |
4767 | ||
4768 | if (UNIT_VTABLE(u)->control_pid) | |
4769 | return UNIT_VTABLE(u)->control_pid(u); | |
4770 | ||
4771 | return 0; | |
4772 | } | |
4773 | ||
4774 | pid_t unit_main_pid(Unit *u) { | |
4775 | assert(u); | |
4776 | ||
4777 | if (UNIT_VTABLE(u)->main_pid) | |
4778 | return UNIT_VTABLE(u)->main_pid(u); | |
4779 | ||
4780 | return 0; | |
4781 | } | |
00d9ef85 LP |
4782 | |
4783 | static void unit_unref_uid_internal( | |
4784 | Unit *u, | |
4785 | uid_t *ref_uid, | |
4786 | bool destroy_now, | |
4787 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
4788 | ||
4789 | assert(u); | |
4790 | assert(ref_uid); | |
4791 | assert(_manager_unref_uid); | |
4792 | ||
4793 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
4794 | * gid_t are actually the same time, with the same validity rules. | |
4795 | * | |
4796 | * Drops a reference to UID/GID from a unit. */ | |
4797 | ||
4798 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4799 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4800 | ||
4801 | if (!uid_is_valid(*ref_uid)) | |
4802 | return; | |
4803 | ||
4804 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
4805 | *ref_uid = UID_INVALID; | |
4806 | } | |
4807 | ||
b90cf102 | 4808 | static void unit_unref_uid(Unit *u, bool destroy_now) { |
00d9ef85 LP |
4809 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); |
4810 | } | |
4811 | ||
b90cf102 | 4812 | static void unit_unref_gid(Unit *u, bool destroy_now) { |
00d9ef85 LP |
4813 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); |
4814 | } | |
4815 | ||
b90cf102 LP |
4816 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { |
4817 | assert(u); | |
4818 | ||
4819 | unit_unref_uid(u, destroy_now); | |
4820 | unit_unref_gid(u, destroy_now); | |
4821 | } | |
4822 | ||
00d9ef85 LP |
4823 | static int unit_ref_uid_internal( |
4824 | Unit *u, | |
4825 | uid_t *ref_uid, | |
4826 | uid_t uid, | |
4827 | bool clean_ipc, | |
4828 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
4829 | ||
4830 | int r; | |
4831 | ||
4832 | assert(u); | |
4833 | assert(ref_uid); | |
4834 | assert(uid_is_valid(uid)); | |
4835 | assert(_manager_ref_uid); | |
4836 | ||
4837 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
4838 | * are actually the same type, and have the same validity rules. | |
4839 | * | |
4840 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
4841 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
4842 | * drops to zero. */ | |
4843 | ||
4844 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4845 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4846 | ||
4847 | if (*ref_uid == uid) | |
4848 | return 0; | |
4849 | ||
4850 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
4851 | return -EBUSY; | |
4852 | ||
4853 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
4854 | if (r < 0) | |
4855 | return r; | |
4856 | ||
4857 | *ref_uid = uid; | |
4858 | return 1; | |
4859 | } | |
4860 | ||
b90cf102 | 4861 | static int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { |
00d9ef85 LP |
4862 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); |
4863 | } | |
4864 | ||
b90cf102 | 4865 | static int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { |
00d9ef85 LP |
4866 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); |
4867 | } | |
4868 | ||
4869 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
4870 | int r = 0, q = 0; | |
4871 | ||
4872 | assert(u); | |
4873 | ||
4874 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
4875 | ||
4876 | if (uid_is_valid(uid)) { | |
4877 | r = unit_ref_uid(u, uid, clean_ipc); | |
4878 | if (r < 0) | |
4879 | return r; | |
4880 | } | |
4881 | ||
4882 | if (gid_is_valid(gid)) { | |
4883 | q = unit_ref_gid(u, gid, clean_ipc); | |
4884 | if (q < 0) { | |
4885 | if (r > 0) | |
4886 | unit_unref_uid(u, false); | |
4887 | ||
4888 | return q; | |
4889 | } | |
4890 | } | |
4891 | ||
4892 | return r > 0 || q > 0; | |
4893 | } | |
4894 | ||
4895 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
4896 | ExecContext *c; | |
4897 | int r; | |
4898 | ||
4899 | assert(u); | |
4900 | ||
4901 | c = unit_get_exec_context(u); | |
4902 | ||
4903 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
4904 | if (r < 0) | |
4905 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
4906 | ||
4907 | return r; | |
4908 | } | |
4909 | ||
00d9ef85 LP |
4910 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { |
4911 | int r; | |
4912 | ||
4913 | assert(u); | |
4914 | ||
4915 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
4916 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
4917 | * objects when no service references the UID/GID anymore. */ | |
4918 | ||
4919 | r = unit_ref_uid_gid(u, uid, gid); | |
4920 | if (r > 0) | |
37d0b962 | 4921 | unit_add_to_dbus_queue(u); |
00d9ef85 | 4922 | } |
4b58153d | 4923 | |
4b58153d LP |
4924 | int unit_acquire_invocation_id(Unit *u) { |
4925 | sd_id128_t id; | |
4926 | int r; | |
4927 | ||
4928 | assert(u); | |
4929 | ||
4930 | r = sd_id128_randomize(&id); | |
4931 | if (r < 0) | |
4932 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
4933 | ||
4934 | r = unit_set_invocation_id(u, id); | |
4935 | if (r < 0) | |
4936 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
4937 | ||
af92c603 | 4938 | unit_add_to_dbus_queue(u); |
4b58153d LP |
4939 | return 0; |
4940 | } | |
f0d47797 | 4941 | |
1ad6e8b3 LP |
4942 | int unit_set_exec_params(Unit *u, ExecParameters *p) { |
4943 | int r; | |
4944 | ||
7960b0c7 LP |
4945 | assert(u); |
4946 | assert(p); | |
f0d47797 | 4947 | |
004c7f16 | 4948 | /* Copy parameters from manager */ |
1ad6e8b3 LP |
4949 | r = manager_get_effective_environment(u->manager, &p->environment); |
4950 | if (r < 0) | |
4951 | return r; | |
4952 | ||
004c7f16 LP |
4953 | p->confirm_spawn = manager_get_confirm_spawn(u->manager); |
4954 | p->cgroup_supported = u->manager->cgroup_supported; | |
4955 | p->prefix = u->manager->prefix; | |
4956 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
4957 | ||
5238e957 | 4958 | /* Copy parameters from unit */ |
7960b0c7 | 4959 | p->cgroup_path = u->cgroup_path; |
1d9cc876 | 4960 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
1ad6e8b3 | 4961 | |
bb0c0d6f LP |
4962 | p->received_credentials = u->manager->received_credentials; |
4963 | ||
1ad6e8b3 | 4964 | return 0; |
f0d47797 | 4965 | } |
a79279c7 | 4966 | |
4c253ed1 | 4967 | int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) { |
a79279c7 LP |
4968 | int r; |
4969 | ||
4970 | assert(u); | |
4971 | assert(ret); | |
4972 | ||
4973 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
4974 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
4975 | ||
4976 | (void) unit_realize_cgroup(u); | |
4977 | ||
4c253ed1 LP |
4978 | r = safe_fork(name, FORK_REOPEN_LOG, ret); |
4979 | if (r != 0) | |
4980 | return r; | |
a79279c7 | 4981 | |
9c274488 LP |
4982 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE); |
4983 | (void) ignore_signals(SIGPIPE); | |
a79279c7 | 4984 | |
4c253ed1 | 4985 | (void) prctl(PR_SET_PDEATHSIG, SIGTERM); |
a79279c7 | 4986 | |
4c253ed1 LP |
4987 | if (u->cgroup_path) { |
4988 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
4989 | if (r < 0) { | |
4990 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", u->cgroup_path); | |
4991 | _exit(EXIT_CGROUP); | |
a79279c7 | 4992 | } |
a79279c7 LP |
4993 | } |
4994 | ||
4c253ed1 | 4995 | return 0; |
a79279c7 | 4996 | } |
c999cf38 | 4997 | |
810ef318 YW |
4998 | int unit_fork_and_watch_rm_rf(Unit *u, char **paths, pid_t *ret_pid) { |
4999 | pid_t pid; | |
5000 | int r; | |
5001 | ||
5002 | assert(u); | |
5003 | assert(ret_pid); | |
5004 | ||
5005 | r = unit_fork_helper_process(u, "(sd-rmrf)", &pid); | |
5006 | if (r < 0) | |
5007 | return r; | |
5008 | if (r == 0) { | |
5009 | int ret = EXIT_SUCCESS; | |
5010 | char **i; | |
5011 | ||
5012 | STRV_FOREACH(i, paths) { | |
5013 | r = rm_rf(*i, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_MISSING_OK); | |
5014 | if (r < 0) { | |
5015 | log_error_errno(r, "Failed to remove '%s': %m", *i); | |
5016 | ret = EXIT_FAILURE; | |
5017 | } | |
5018 | } | |
5019 | ||
5020 | _exit(ret); | |
5021 | } | |
5022 | ||
5023 | r = unit_watch_pid(u, pid, true); | |
5024 | if (r < 0) | |
5025 | return r; | |
5026 | ||
5027 | *ret_pid = pid; | |
5028 | return 0; | |
5029 | } | |
5030 | ||
15ed3c3a LP |
5031 | static void unit_update_dependency_mask(Hashmap *deps, Unit *other, UnitDependencyInfo di) { |
5032 | assert(deps); | |
c999cf38 LP |
5033 | assert(other); |
5034 | ||
15ed3c3a | 5035 | if (di.origin_mask == 0 && di.destination_mask == 0) |
c999cf38 | 5036 | /* No bit set anymore, let's drop the whole entry */ |
15ed3c3a LP |
5037 | assert_se(hashmap_remove(deps, other)); |
5038 | else | |
c999cf38 | 5039 | /* Mask was reduced, let's update the entry */ |
15ed3c3a | 5040 | assert_se(hashmap_update(deps, other, di.data) == 0); |
c999cf38 LP |
5041 | } |
5042 | ||
5043 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
15ed3c3a | 5044 | Hashmap *deps; |
c999cf38 LP |
5045 | assert(u); |
5046 | ||
5047 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5048 | ||
5049 | if (mask == 0) | |
5050 | return; | |
5051 | ||
15ed3c3a | 5052 | HASHMAP_FOREACH(deps, u->dependencies) { |
c999cf38 LP |
5053 | bool done; |
5054 | ||
5055 | do { | |
5056 | UnitDependencyInfo di; | |
5057 | Unit *other; | |
c999cf38 LP |
5058 | |
5059 | done = true; | |
5060 | ||
15ed3c3a LP |
5061 | HASHMAP_FOREACH_KEY(di.data, other, deps) { |
5062 | Hashmap *other_deps; | |
5063 | ||
1d6cc5d0 | 5064 | if (FLAGS_SET(~mask, di.origin_mask)) |
c999cf38 | 5065 | continue; |
15ed3c3a | 5066 | |
c999cf38 | 5067 | di.origin_mask &= ~mask; |
15ed3c3a | 5068 | unit_update_dependency_mask(deps, other, di); |
c999cf38 | 5069 | |
defe63b0 LP |
5070 | /* We updated the dependency from our unit to the other unit now. But most |
5071 | * dependencies imply a reverse dependency. Hence, let's delete that one | |
5072 | * too. For that we go through all dependency types on the other unit and | |
5073 | * delete all those which point to us and have the right mask set. */ | |
c999cf38 | 5074 | |
15ed3c3a | 5075 | HASHMAP_FOREACH(other_deps, other->dependencies) { |
c999cf38 LP |
5076 | UnitDependencyInfo dj; |
5077 | ||
15ed3c3a | 5078 | dj.data = hashmap_get(other_deps, u); |
1d6cc5d0 | 5079 | if (FLAGS_SET(~mask, dj.destination_mask)) |
c999cf38 | 5080 | continue; |
c999cf38 | 5081 | |
15ed3c3a LP |
5082 | dj.destination_mask &= ~mask; |
5083 | unit_update_dependency_mask(other_deps, u, dj); | |
c999cf38 LP |
5084 | } |
5085 | ||
5086 | unit_add_to_gc_queue(other); | |
5087 | ||
5088 | done = false; | |
5089 | break; | |
5090 | } | |
5091 | ||
5092 | } while (!done); | |
5093 | } | |
5094 | } | |
d3070fbd | 5095 | |
2f8c48b6 AZ |
5096 | static int unit_get_invocation_path(Unit *u, char **ret) { |
5097 | char *p; | |
5098 | int r; | |
5099 | ||
5100 | assert(u); | |
5101 | assert(ret); | |
5102 | ||
5103 | if (MANAGER_IS_SYSTEM(u->manager)) | |
5104 | p = strjoin("/run/systemd/units/invocation:", u->id); | |
5105 | else { | |
5106 | _cleanup_free_ char *user_path = NULL; | |
5107 | r = xdg_user_runtime_dir(&user_path, "/systemd/units/invocation:"); | |
5108 | if (r < 0) | |
5109 | return r; | |
5110 | p = strjoin(user_path, u->id); | |
5111 | } | |
5112 | ||
5113 | if (!p) | |
5114 | return -ENOMEM; | |
5115 | ||
5116 | *ret = p; | |
5117 | return 0; | |
5118 | } | |
5119 | ||
d3070fbd | 5120 | static int unit_export_invocation_id(Unit *u) { |
2f8c48b6 | 5121 | _cleanup_free_ char *p = NULL; |
d3070fbd LP |
5122 | int r; |
5123 | ||
5124 | assert(u); | |
5125 | ||
5126 | if (u->exported_invocation_id) | |
5127 | return 0; | |
5128 | ||
5129 | if (sd_id128_is_null(u->invocation_id)) | |
5130 | return 0; | |
5131 | ||
2f8c48b6 AZ |
5132 | r = unit_get_invocation_path(u, &p); |
5133 | if (r < 0) | |
5134 | return log_unit_debug_errno(u, r, "Failed to get invocation path: %m"); | |
5135 | ||
a3f5fd96 | 5136 | r = symlink_atomic_label(u->invocation_id_string, p); |
d3070fbd LP |
5137 | if (r < 0) |
5138 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5139 | ||
5140 | u->exported_invocation_id = true; | |
5141 | return 0; | |
5142 | } | |
5143 | ||
5144 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5145 | const char *p; | |
5146 | char buf[2]; | |
5147 | int r; | |
5148 | ||
5149 | assert(u); | |
5150 | assert(c); | |
5151 | ||
5152 | if (u->exported_log_level_max) | |
5153 | return 0; | |
5154 | ||
5155 | if (c->log_level_max < 0) | |
5156 | return 0; | |
5157 | ||
5158 | assert(c->log_level_max <= 7); | |
5159 | ||
5160 | buf[0] = '0' + c->log_level_max; | |
5161 | buf[1] = 0; | |
5162 | ||
5163 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5164 | r = symlink_atomic(buf, p); | |
5165 | if (r < 0) | |
5166 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5167 | ||
5168 | u->exported_log_level_max = true; | |
5169 | return 0; | |
5170 | } | |
5171 | ||
5172 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5173 | _cleanup_close_ int fd = -1; | |
5174 | struct iovec *iovec; | |
5175 | const char *p; | |
5176 | char *pattern; | |
5177 | le64_t *sizes; | |
5178 | ssize_t n; | |
d3070fbd LP |
5179 | int r; |
5180 | ||
5181 | if (u->exported_log_extra_fields) | |
5182 | return 0; | |
5183 | ||
5184 | if (c->n_log_extra_fields <= 0) | |
5185 | return 0; | |
5186 | ||
5187 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5188 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5189 | ||
12375b95 | 5190 | for (size_t i = 0; i < c->n_log_extra_fields; i++) { |
d3070fbd LP |
5191 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); |
5192 | ||
5193 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5194 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5195 | } | |
5196 | ||
5197 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5198 | pattern = strjoina(p, ".XXXXXX"); | |
5199 | ||
5200 | fd = mkostemp_safe(pattern); | |
5201 | if (fd < 0) | |
5202 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5203 | ||
5204 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5205 | if (n < 0) { | |
5206 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5207 | goto fail; | |
5208 | } | |
5209 | ||
5210 | (void) fchmod(fd, 0644); | |
5211 | ||
5212 | if (rename(pattern, p) < 0) { | |
5213 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5214 | goto fail; | |
5215 | } | |
5216 | ||
5217 | u->exported_log_extra_fields = true; | |
5218 | return 0; | |
5219 | ||
5220 | fail: | |
5221 | (void) unlink(pattern); | |
5222 | return r; | |
5223 | } | |
5224 | ||
5ac1530e | 5225 | static int unit_export_log_ratelimit_interval(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5226 | _cleanup_free_ char *buf = NULL; |
5227 | const char *p; | |
5228 | int r; | |
5229 | ||
5230 | assert(u); | |
5231 | assert(c); | |
5232 | ||
5ac1530e | 5233 | if (u->exported_log_ratelimit_interval) |
90fc172e AZ |
5234 | return 0; |
5235 | ||
5ac1530e | 5236 | if (c->log_ratelimit_interval_usec == 0) |
90fc172e AZ |
5237 | return 0; |
5238 | ||
5239 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5240 | ||
5ac1530e | 5241 | if (asprintf(&buf, "%" PRIu64, c->log_ratelimit_interval_usec) < 0) |
90fc172e AZ |
5242 | return log_oom(); |
5243 | ||
5244 | r = symlink_atomic(buf, p); | |
5245 | if (r < 0) | |
5246 | return log_unit_debug_errno(u, r, "Failed to create log rate limit interval symlink %s: %m", p); | |
5247 | ||
5ac1530e | 5248 | u->exported_log_ratelimit_interval = true; |
90fc172e AZ |
5249 | return 0; |
5250 | } | |
5251 | ||
5ac1530e | 5252 | static int unit_export_log_ratelimit_burst(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5253 | _cleanup_free_ char *buf = NULL; |
5254 | const char *p; | |
5255 | int r; | |
5256 | ||
5257 | assert(u); | |
5258 | assert(c); | |
5259 | ||
5ac1530e | 5260 | if (u->exported_log_ratelimit_burst) |
90fc172e AZ |
5261 | return 0; |
5262 | ||
5ac1530e | 5263 | if (c->log_ratelimit_burst == 0) |
90fc172e AZ |
5264 | return 0; |
5265 | ||
5266 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5267 | ||
5ac1530e | 5268 | if (asprintf(&buf, "%u", c->log_ratelimit_burst) < 0) |
90fc172e AZ |
5269 | return log_oom(); |
5270 | ||
5271 | r = symlink_atomic(buf, p); | |
5272 | if (r < 0) | |
5273 | return log_unit_debug_errno(u, r, "Failed to create log rate limit burst symlink %s: %m", p); | |
5274 | ||
5ac1530e | 5275 | u->exported_log_ratelimit_burst = true; |
90fc172e AZ |
5276 | return 0; |
5277 | } | |
5278 | ||
d3070fbd LP |
5279 | void unit_export_state_files(Unit *u) { |
5280 | const ExecContext *c; | |
5281 | ||
5282 | assert(u); | |
5283 | ||
5284 | if (!u->id) | |
5285 | return; | |
5286 | ||
638cece4 | 5287 | if (MANAGER_IS_TEST_RUN(u->manager)) |
8f632531 LP |
5288 | return; |
5289 | ||
d3070fbd LP |
5290 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5291 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5292 | * the IPC system itself and PID 1 also log to the journal. | |
5293 | * | |
5294 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5295 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5296 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5297 | * namespace at least. | |
5298 | * | |
5299 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5300 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5301 | * them with one. */ | |
5302 | ||
5303 | (void) unit_export_invocation_id(u); | |
5304 | ||
2f8c48b6 AZ |
5305 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5306 | return; | |
5307 | ||
d3070fbd LP |
5308 | c = unit_get_exec_context(u); |
5309 | if (c) { | |
5310 | (void) unit_export_log_level_max(u, c); | |
5311 | (void) unit_export_log_extra_fields(u, c); | |
5ac1530e ZJS |
5312 | (void) unit_export_log_ratelimit_interval(u, c); |
5313 | (void) unit_export_log_ratelimit_burst(u, c); | |
d3070fbd LP |
5314 | } |
5315 | } | |
5316 | ||
5317 | void unit_unlink_state_files(Unit *u) { | |
5318 | const char *p; | |
5319 | ||
5320 | assert(u); | |
5321 | ||
5322 | if (!u->id) | |
5323 | return; | |
5324 | ||
d3070fbd LP |
5325 | /* Undoes the effect of unit_export_state() */ |
5326 | ||
5327 | if (u->exported_invocation_id) { | |
2f8c48b6 AZ |
5328 | _cleanup_free_ char *invocation_path = NULL; |
5329 | int r = unit_get_invocation_path(u, &invocation_path); | |
5330 | if (r >= 0) { | |
5331 | (void) unlink(invocation_path); | |
5332 | u->exported_invocation_id = false; | |
5333 | } | |
d3070fbd LP |
5334 | } |
5335 | ||
2f8c48b6 AZ |
5336 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5337 | return; | |
5338 | ||
d3070fbd LP |
5339 | if (u->exported_log_level_max) { |
5340 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5341 | (void) unlink(p); | |
5342 | ||
5343 | u->exported_log_level_max = false; | |
5344 | } | |
5345 | ||
5346 | if (u->exported_log_extra_fields) { | |
5347 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5348 | (void) unlink(p); | |
5349 | ||
5350 | u->exported_log_extra_fields = false; | |
5351 | } | |
90fc172e | 5352 | |
5ac1530e | 5353 | if (u->exported_log_ratelimit_interval) { |
90fc172e AZ |
5354 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); |
5355 | (void) unlink(p); | |
5356 | ||
5ac1530e | 5357 | u->exported_log_ratelimit_interval = false; |
90fc172e AZ |
5358 | } |
5359 | ||
5ac1530e | 5360 | if (u->exported_log_ratelimit_burst) { |
90fc172e AZ |
5361 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); |
5362 | (void) unlink(p); | |
5363 | ||
5ac1530e | 5364 | u->exported_log_ratelimit_burst = false; |
90fc172e | 5365 | } |
d3070fbd | 5366 | } |
5afe510c | 5367 | |
3c7416b6 LP |
5368 | int unit_prepare_exec(Unit *u) { |
5369 | int r; | |
5370 | ||
5371 | assert(u); | |
5372 | ||
fab34748 KL |
5373 | /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable. |
5374 | * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */ | |
5375 | r = bpf_firewall_load_custom(u); | |
5376 | if (r < 0) | |
5377 | return r; | |
5378 | ||
3c7416b6 LP |
5379 | /* Prepares everything so that we can fork of a process for this unit */ |
5380 | ||
5381 | (void) unit_realize_cgroup(u); | |
5382 | ||
5383 | if (u->reset_accounting) { | |
9b2559a1 | 5384 | (void) unit_reset_accounting(u); |
3c7416b6 LP |
5385 | u->reset_accounting = false; |
5386 | } | |
5387 | ||
5388 | unit_export_state_files(u); | |
5389 | ||
5390 | r = unit_setup_exec_runtime(u); | |
5391 | if (r < 0) | |
5392 | return r; | |
5393 | ||
5394 | r = unit_setup_dynamic_creds(u); | |
5395 | if (r < 0) | |
5396 | return r; | |
5397 | ||
5398 | return 0; | |
5399 | } | |
5400 | ||
4c425434 LP |
5401 | static bool ignore_leftover_process(const char *comm) { |
5402 | return comm && comm[0] == '('; /* Most likely our own helper process (PAM?), ignore */ | |
5403 | } | |
5404 | ||
5405 | int unit_log_leftover_process_start(pid_t pid, int sig, void *userdata) { | |
a4634b21 LP |
5406 | _cleanup_free_ char *comm = NULL; |
5407 | ||
5408 | (void) get_process_comm(pid, &comm); | |
5409 | ||
4c425434 | 5410 | if (ignore_leftover_process(comm)) |
c53d2d54 | 5411 | return 0; |
a4634b21 | 5412 | |
4c425434 LP |
5413 | /* During start we print a warning */ |
5414 | ||
a4634b21 LP |
5415 | log_unit_warning(userdata, |
5416 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5417 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5418 | pid, strna(comm)); | |
c53d2d54 DB |
5419 | |
5420 | return 1; | |
a4634b21 LP |
5421 | } |
5422 | ||
4c425434 LP |
5423 | int unit_log_leftover_process_stop(pid_t pid, int sig, void *userdata) { |
5424 | _cleanup_free_ char *comm = NULL; | |
5425 | ||
5426 | (void) get_process_comm(pid, &comm); | |
5427 | ||
5428 | if (ignore_leftover_process(comm)) | |
5429 | return 0; | |
5430 | ||
5431 | /* During stop we only print an informational message */ | |
5432 | ||
5433 | log_unit_info(userdata, | |
5434 | "Unit process " PID_FMT " (%s) remains running after unit stopped.", | |
5435 | pid, strna(comm)); | |
5436 | ||
5437 | return 1; | |
5438 | } | |
5439 | ||
5440 | int unit_warn_leftover_processes(Unit *u, cg_kill_log_func_t log_func) { | |
a4634b21 LP |
5441 | assert(u); |
5442 | ||
5443 | (void) unit_pick_cgroup_path(u); | |
5444 | ||
5445 | if (!u->cgroup_path) | |
c53d2d54 | 5446 | return 0; |
a4634b21 | 5447 | |
4c425434 | 5448 | return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_func, u); |
a4634b21 LP |
5449 | } |
5450 | ||
bb2c7685 LP |
5451 | bool unit_needs_console(Unit *u) { |
5452 | ExecContext *ec; | |
5453 | UnitActiveState state; | |
5454 | ||
5455 | assert(u); | |
5456 | ||
5457 | state = unit_active_state(u); | |
5458 | ||
5459 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5460 | return false; | |
5461 | ||
5462 | if (UNIT_VTABLE(u)->needs_console) | |
5463 | return UNIT_VTABLE(u)->needs_console(u); | |
5464 | ||
5465 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5466 | ec = unit_get_exec_context(u); | |
5467 | if (!ec) | |
5468 | return false; | |
5469 | ||
5470 | return exec_context_may_touch_console(ec); | |
5471 | } | |
5472 | ||
f156e60c | 5473 | const char *unit_label_path(const Unit *u) { |
81e9871e LP |
5474 | const char *p; |
5475 | ||
f156e60c CG |
5476 | assert(u); |
5477 | ||
81e9871e LP |
5478 | /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off |
5479 | * when validating access checks. */ | |
5480 | ||
5481 | p = u->source_path ?: u->fragment_path; | |
5482 | if (!p) | |
5483 | return NULL; | |
5484 | ||
5485 | /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */ | |
640f3b14 | 5486 | if (null_or_empty_path(p) > 0) |
81e9871e LP |
5487 | return NULL; |
5488 | ||
5489 | return p; | |
5490 | } | |
5491 | ||
6592b975 LP |
5492 | int unit_pid_attachable(Unit *u, pid_t pid, sd_bus_error *error) { |
5493 | int r; | |
5494 | ||
5495 | assert(u); | |
5496 | ||
5497 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5498 | * and not a kernel thread either */ | |
5499 | ||
5500 | /* First, a simple range check */ | |
5501 | if (!pid_is_valid(pid)) | |
5502 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier " PID_FMT " is not valid.", pid); | |
5503 | ||
5504 | /* Some extra safety check */ | |
5505 | if (pid == 1 || pid == getpid_cached()) | |
3fe91079 | 5506 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager process, refusing.", pid); |
6592b975 LP |
5507 | |
5508 | /* Don't even begin to bother with kernel threads */ | |
5509 | r = is_kernel_thread(pid); | |
5510 | if (r == -ESRCH) | |
5511 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid); | |
5512 | if (r < 0) | |
5513 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid); | |
5514 | if (r > 0) | |
5515 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid); | |
5516 | ||
5517 | return 0; | |
5518 | } | |
5519 | ||
523ee2d4 LP |
5520 | void unit_log_success(Unit *u) { |
5521 | assert(u); | |
5522 | ||
c2503e35 RH |
5523 | log_unit_struct(u, LOG_INFO, |
5524 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR, | |
5525 | LOG_UNIT_INVOCATION_ID(u), | |
5526 | LOG_UNIT_MESSAGE(u, "Deactivated successfully.")); | |
523ee2d4 LP |
5527 | } |
5528 | ||
7c047d74 LP |
5529 | void unit_log_failure(Unit *u, const char *result) { |
5530 | assert(u); | |
5531 | assert(result); | |
5532 | ||
c2503e35 RH |
5533 | log_unit_struct(u, LOG_WARNING, |
5534 | "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR, | |
5535 | LOG_UNIT_INVOCATION_ID(u), | |
5536 | LOG_UNIT_MESSAGE(u, "Failed with result '%s'.", result), | |
5537 | "UNIT_RESULT=%s", result); | |
7c047d74 LP |
5538 | } |
5539 | ||
31cd5f63 AZ |
5540 | void unit_log_skip(Unit *u, const char *result) { |
5541 | assert(u); | |
5542 | assert(result); | |
5543 | ||
c2503e35 RH |
5544 | log_unit_struct(u, LOG_INFO, |
5545 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR, | |
5546 | LOG_UNIT_INVOCATION_ID(u), | |
5547 | LOG_UNIT_MESSAGE(u, "Skipped due to '%s'.", result), | |
5548 | "UNIT_RESULT=%s", result); | |
31cd5f63 AZ |
5549 | } |
5550 | ||
91bbd9b7 LP |
5551 | void unit_log_process_exit( |
5552 | Unit *u, | |
91bbd9b7 LP |
5553 | const char *kind, |
5554 | const char *command, | |
5cc2cd1c | 5555 | bool success, |
91bbd9b7 LP |
5556 | int code, |
5557 | int status) { | |
5558 | ||
5cc2cd1c ZJS |
5559 | int level; |
5560 | ||
91bbd9b7 LP |
5561 | assert(u); |
5562 | assert(kind); | |
5563 | ||
5cc2cd1c ZJS |
5564 | /* If this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure |
5565 | * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption | |
5566 | * that the service already logged the reason at a higher log level on its own. Otherwise, make it a | |
5567 | * WARNING. */ | |
5568 | if (success) | |
5569 | level = LOG_DEBUG; | |
5570 | else if (code == CLD_EXITED) | |
5571 | level = LOG_NOTICE; | |
5572 | else | |
91bbd9b7 LP |
5573 | level = LOG_WARNING; |
5574 | ||
c2503e35 RH |
5575 | log_unit_struct(u, level, |
5576 | "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR, | |
5577 | LOG_UNIT_MESSAGE(u, "%s exited, code=%s, status=%i/%s", | |
5578 | kind, | |
5579 | sigchld_code_to_string(code), status, | |
5580 | strna(code == CLD_EXITED | |
5581 | ? exit_status_to_string(status, EXIT_STATUS_FULL) | |
5582 | : signal_to_string(status))), | |
5583 | "EXIT_CODE=%s", sigchld_code_to_string(code), | |
5584 | "EXIT_STATUS=%i", status, | |
5585 | "COMMAND=%s", strna(command), | |
5586 | LOG_UNIT_INVOCATION_ID(u)); | |
91bbd9b7 LP |
5587 | } |
5588 | ||
7af67e9a LP |
5589 | int unit_exit_status(Unit *u) { |
5590 | assert(u); | |
5591 | ||
5592 | /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range | |
5593 | * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA | |
5594 | * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main | |
5595 | * service process has exited abnormally (signal/coredump). */ | |
5596 | ||
5597 | if (!UNIT_VTABLE(u)->exit_status) | |
5598 | return -EOPNOTSUPP; | |
5599 | ||
5600 | return UNIT_VTABLE(u)->exit_status(u); | |
5601 | } | |
5602 | ||
5603 | int unit_failure_action_exit_status(Unit *u) { | |
5604 | int r; | |
5605 | ||
5606 | assert(u); | |
5607 | ||
5608 | /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */ | |
5609 | ||
5610 | if (u->failure_action_exit_status >= 0) | |
5611 | return u->failure_action_exit_status; | |
5612 | ||
5613 | r = unit_exit_status(u); | |
5614 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5615 | return 255; | |
5616 | ||
5617 | return r; | |
5618 | } | |
5619 | ||
5620 | int unit_success_action_exit_status(Unit *u) { | |
5621 | int r; | |
5622 | ||
5623 | assert(u); | |
5624 | ||
5625 | /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */ | |
5626 | ||
5627 | if (u->success_action_exit_status >= 0) | |
5628 | return u->success_action_exit_status; | |
5629 | ||
5630 | r = unit_exit_status(u); | |
5631 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5632 | return 255; | |
5633 | ||
5634 | return r; | |
5635 | } | |
5636 | ||
a4191c9f LP |
5637 | int unit_test_trigger_loaded(Unit *u) { |
5638 | Unit *trigger; | |
5639 | ||
5640 | /* Tests whether the unit to trigger is loaded */ | |
5641 | ||
5642 | trigger = UNIT_TRIGGER(u); | |
5643 | if (!trigger) | |
e7b9f4d9 ZJS |
5644 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
5645 | "Refusing to start, no unit to trigger."); | |
a4191c9f | 5646 | if (trigger->load_state != UNIT_LOADED) |
e7b9f4d9 ZJS |
5647 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
5648 | "Refusing to start, unit %s to trigger not loaded.", trigger->id); | |
a4191c9f LP |
5649 | |
5650 | return 0; | |
5651 | } | |
5652 | ||
bb0c0d6f LP |
5653 | void unit_destroy_runtime_data(Unit *u, const ExecContext *context) { |
5654 | assert(u); | |
5655 | assert(context); | |
5656 | ||
95939aed YW |
5657 | if (context->runtime_directory_preserve_mode == EXEC_PRESERVE_NO || |
5658 | (context->runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART && !unit_will_restart(u))) | |
5659 | exec_context_destroy_runtime_directory(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME]); | |
bb0c0d6f LP |
5660 | |
5661 | exec_context_destroy_credentials(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME], u->id); | |
95939aed YW |
5662 | } |
5663 | ||
380dc8b0 LP |
5664 | int unit_clean(Unit *u, ExecCleanMask mask) { |
5665 | UnitActiveState state; | |
5666 | ||
5667 | assert(u); | |
5668 | ||
5669 | /* Special return values: | |
5670 | * | |
5671 | * -EOPNOTSUPP → cleaning not supported for this unit type | |
5672 | * -EUNATCH → cleaning not defined for this resource type | |
5673 | * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has | |
5674 | * a job queued or similar | |
5675 | */ | |
5676 | ||
5677 | if (!UNIT_VTABLE(u)->clean) | |
5678 | return -EOPNOTSUPP; | |
5679 | ||
5680 | if (mask == 0) | |
5681 | return -EUNATCH; | |
5682 | ||
5683 | if (u->load_state != UNIT_LOADED) | |
5684 | return -EBUSY; | |
5685 | ||
5686 | if (u->job) | |
5687 | return -EBUSY; | |
5688 | ||
5689 | state = unit_active_state(u); | |
5690 | if (!IN_SET(state, UNIT_INACTIVE)) | |
5691 | return -EBUSY; | |
5692 | ||
5693 | return UNIT_VTABLE(u)->clean(u, mask); | |
5694 | } | |
5695 | ||
5696 | int unit_can_clean(Unit *u, ExecCleanMask *ret) { | |
5697 | assert(u); | |
5698 | ||
5699 | if (!UNIT_VTABLE(u)->clean || | |
5700 | u->load_state != UNIT_LOADED) { | |
5701 | *ret = 0; | |
5702 | return 0; | |
5703 | } | |
5704 | ||
5705 | /* When the clean() method is set, can_clean() really should be set too */ | |
5706 | assert(UNIT_VTABLE(u)->can_clean); | |
5707 | ||
5708 | return UNIT_VTABLE(u)->can_clean(u, ret); | |
5709 | } | |
5710 | ||
d9e45bc3 MS |
5711 | bool unit_can_freeze(Unit *u) { |
5712 | assert(u); | |
5713 | ||
5714 | if (UNIT_VTABLE(u)->can_freeze) | |
5715 | return UNIT_VTABLE(u)->can_freeze(u); | |
5716 | ||
5717 | return UNIT_VTABLE(u)->freeze; | |
5718 | } | |
5719 | ||
5720 | void unit_frozen(Unit *u) { | |
5721 | assert(u); | |
5722 | ||
5723 | u->freezer_state = FREEZER_FROZEN; | |
5724 | ||
5725 | bus_unit_send_pending_freezer_message(u); | |
5726 | } | |
5727 | ||
5728 | void unit_thawed(Unit *u) { | |
5729 | assert(u); | |
5730 | ||
5731 | u->freezer_state = FREEZER_RUNNING; | |
5732 | ||
5733 | bus_unit_send_pending_freezer_message(u); | |
5734 | } | |
5735 | ||
5736 | static int unit_freezer_action(Unit *u, FreezerAction action) { | |
5737 | UnitActiveState s; | |
5738 | int (*method)(Unit*); | |
5739 | int r; | |
5740 | ||
5741 | assert(u); | |
5742 | assert(IN_SET(action, FREEZER_FREEZE, FREEZER_THAW)); | |
5743 | ||
5744 | method = action == FREEZER_FREEZE ? UNIT_VTABLE(u)->freeze : UNIT_VTABLE(u)->thaw; | |
5745 | if (!method || !cg_freezer_supported()) | |
5746 | return -EOPNOTSUPP; | |
5747 | ||
5748 | if (u->job) | |
5749 | return -EBUSY; | |
5750 | ||
5751 | if (u->load_state != UNIT_LOADED) | |
5752 | return -EHOSTDOWN; | |
5753 | ||
5754 | s = unit_active_state(u); | |
5755 | if (s != UNIT_ACTIVE) | |
5756 | return -EHOSTDOWN; | |
5757 | ||
5758 | if (IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_THAWING)) | |
5759 | return -EALREADY; | |
5760 | ||
5761 | r = method(u); | |
5762 | if (r <= 0) | |
5763 | return r; | |
5764 | ||
5765 | return 1; | |
5766 | } | |
5767 | ||
5768 | int unit_freeze(Unit *u) { | |
5769 | return unit_freezer_action(u, FREEZER_FREEZE); | |
5770 | } | |
5771 | ||
5772 | int unit_thaw(Unit *u) { | |
5773 | return unit_freezer_action(u, FREEZER_THAW); | |
5774 | } | |
5775 | ||
5776 | /* Wrappers around low-level cgroup freezer operations common for service and scope units */ | |
5777 | int unit_freeze_vtable_common(Unit *u) { | |
5778 | return unit_cgroup_freezer_action(u, FREEZER_FREEZE); | |
5779 | } | |
5780 | ||
5781 | int unit_thaw_vtable_common(Unit *u) { | |
5782 | return unit_cgroup_freezer_action(u, FREEZER_THAW); | |
5783 | } | |
5784 | ||
5afe510c LP |
5785 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
5786 | [COLLECT_INACTIVE] = "inactive", | |
5787 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
5788 | }; | |
5789 | ||
5790 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); | |
15ed3c3a LP |
5791 | |
5792 | Unit* unit_has_dependency(const Unit *u, UnitDependencyAtom atom, Unit *other) { | |
5793 | Unit *i; | |
5794 | ||
5795 | assert(u); | |
5796 | ||
5797 | /* Checks if the unit has a dependency on 'other' with the specified dependency atom. If 'other' is | |
5798 | * NULL checks if the unit has *any* dependency of that atom. Returns 'other' if found (or if 'other' | |
5799 | * is NULL the first entry found), or NULL if not found. */ | |
5800 | ||
5801 | UNIT_FOREACH_DEPENDENCY(i, u, atom) | |
5802 | if (!other || other == i) | |
5803 | return i; | |
5804 | ||
5805 | return NULL; | |
5806 | } | |
5807 | ||
5808 | int unit_get_dependency_array(const Unit *u, UnitDependencyAtom atom, Unit ***ret_array) { | |
5809 | _cleanup_free_ Unit **array = NULL; | |
5810 | size_t n = 0; | |
5811 | Unit *other; | |
5812 | ||
5813 | assert(u); | |
5814 | assert(ret_array); | |
5815 | ||
5816 | /* Gets a list of units matching a specific atom as array. This is useful when iterating through | |
5817 | * dependencies while modifying them: the array is an "atomic snapshot" of sorts, that can be read | |
48008c1c | 5818 | * while the dependency table is continuously updated. */ |
15ed3c3a LP |
5819 | |
5820 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
5821 | if (!GREEDY_REALLOC(array, n + 1)) | |
5822 | return -ENOMEM; | |
5823 | ||
5824 | array[n++] = other; | |
5825 | } | |
5826 | ||
5827 | *ret_array = TAKE_PTR(array); | |
5828 | ||
5829 | assert(n <= INT_MAX); | |
5830 | return (int) n; | |
5831 | } |