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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
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" |
4f5dd394 LP |
14 | #include "bus-common-errors.h" |
15 | #include "bus-util.h" | |
fdb3deca | 16 | #include "cgroup-setup.h" |
c6c18be3 | 17 | #include "cgroup-util.h" |
4f5dd394 LP |
18 | #include "dbus-unit.h" |
19 | #include "dbus.h" | |
20 | #include "dropin.h" | |
21 | #include "escape.h" | |
22 | #include "execute.h" | |
6a48d82f | 23 | #include "fd-util.h" |
a5c32cff | 24 | #include "fileio-label.h" |
ee228be1 | 25 | #include "fileio.h" |
f97b34a6 | 26 | #include "format-util.h" |
d3070fbd | 27 | #include "fs-util.h" |
4b58153d | 28 | #include "id128-util.h" |
915b1d01 | 29 | #include "io-util.h" |
5cfa33e0 | 30 | #include "install.h" |
4f5dd394 LP |
31 | #include "load-dropin.h" |
32 | #include "load-fragment.h" | |
33 | #include "log.h" | |
34 | #include "macro.h" | |
f5947a5e | 35 | #include "missing_audit.h" |
4f5dd394 | 36 | #include "mkdir.h" |
6bedfcbb | 37 | #include "parse-util.h" |
4f5dd394 | 38 | #include "path-util.h" |
0b452006 | 39 | #include "process-util.h" |
810ef318 | 40 | #include "rm-rf.h" |
d68c645b | 41 | #include "serialize.h" |
4f5dd394 | 42 | #include "set.h" |
6eb7c172 | 43 | #include "signal-util.h" |
d3070fbd | 44 | #include "sparse-endian.h" |
e9db43d5 | 45 | #include "special.h" |
2e59b241 | 46 | #include "specifier.h" |
8fcde012 | 47 | #include "stat-util.h" |
d054f0a4 | 48 | #include "stdio-util.h" |
5afe510c | 49 | #include "string-table.h" |
07630cea | 50 | #include "string-util.h" |
4f5dd394 | 51 | #include "strv.h" |
5b262f74 | 52 | #include "terminal-util.h" |
e4de7287 | 53 | #include "tmpfile-util.h" |
4f4afc88 | 54 | #include "umask-util.h" |
4f5dd394 | 55 | #include "unit-name.h" |
e9db43d5 | 56 | #include "unit.h" |
b1d4f8e1 LP |
57 | #include "user-util.h" |
58 | #include "virt.h" | |
87f0e418 | 59 | |
37109b85 ZJS |
60 | /* Thresholds for logging at INFO level about resource consumption */ |
61 | #define MENTIONWORTHY_CPU_NSEC (1 * NSEC_PER_SEC) | |
62 | #define MENTIONWORTHY_IO_BYTES (1024 * 1024ULL) | |
63 | #define MENTIONWORTHY_IP_BYTES (0ULL) | |
64 | ||
65 | /* Thresholds for logging at INFO level about resource consumption */ | |
66 | #define NOTICEWORTHY_CPU_NSEC (10*60 * NSEC_PER_SEC) /* 10 minutes */ | |
67 | #define NOTICEWORTHY_IO_BYTES (10 * 1024 * 1024ULL) /* 10 MB */ | |
68 | #define NOTICEWORTHY_IP_BYTES (128 * 1024 * 1024ULL) /* 128 MB */ | |
69 | ||
87f0e418 LP |
70 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { |
71 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 LP |
72 | [UNIT_SOCKET] = &socket_vtable, |
73 | [UNIT_TARGET] = &target_vtable, | |
74 | [UNIT_DEVICE] = &device_vtable, | |
75 | [UNIT_MOUNT] = &mount_vtable, | |
76 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 77 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 78 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 79 | [UNIT_PATH] = &path_vtable, |
6c12b52e | 80 | [UNIT_SLICE] = &slice_vtable, |
5afe510c | 81 | [UNIT_SCOPE] = &scope_vtable, |
87f0e418 LP |
82 | }; |
83 | ||
f2341e0a | 84 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 85 | |
7d17cfbc | 86 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
87 | Unit *u; |
88 | ||
89 | assert(m); | |
ac155bb8 | 90 | assert(size >= sizeof(Unit)); |
87f0e418 | 91 | |
7d17cfbc MS |
92 | u = malloc0(size); |
93 | if (!u) | |
87f0e418 LP |
94 | return NULL; |
95 | ||
ac155bb8 MS |
96 | u->manager = m; |
97 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
98 | u->default_dependencies = true; |
99 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 100 | u->unit_file_preset = -1; |
d420282b | 101 | u->on_failure_job_mode = JOB_REPLACE; |
0bb814c2 | 102 | u->cgroup_control_inotify_wd = -1; |
afcfaa69 | 103 | u->cgroup_memory_inotify_wd = -1; |
36c16a7c | 104 | u->job_timeout = USEC_INFINITY; |
a2df3ea4 | 105 | u->job_running_timeout = USEC_INFINITY; |
00d9ef85 LP |
106 | u->ref_uid = UID_INVALID; |
107 | u->ref_gid = GID_INVALID; | |
fe700f46 | 108 | u->cpu_usage_last = NSEC_INFINITY; |
17f14955 | 109 | u->cgroup_invalidated_mask |= CGROUP_MASK_BPF_FIREWALL; |
7af67e9a | 110 | u->failure_action_exit_status = u->success_action_exit_status = -1; |
87f0e418 | 111 | |
6a48d82f DM |
112 | u->ip_accounting_ingress_map_fd = -1; |
113 | u->ip_accounting_egress_map_fd = -1; | |
114 | u->ipv4_allow_map_fd = -1; | |
115 | u->ipv6_allow_map_fd = -1; | |
116 | u->ipv4_deny_map_fd = -1; | |
117 | u->ipv6_deny_map_fd = -1; | |
118 | ||
2e59b241 LP |
119 | u->last_section_private = -1; |
120 | ||
7bf081a1 | 121 | u->start_ratelimit = (RateLimit) { m->default_start_limit_interval, m->default_start_limit_burst }; |
8c227e7f | 122 | u->auto_stop_ratelimit = (RateLimit) { 10 * USEC_PER_SEC, 16 }; |
bea355da | 123 | |
fbe14fc9 LP |
124 | for (CGroupIOAccountingMetric i = 0; i < _CGROUP_IO_ACCOUNTING_METRIC_MAX; i++) |
125 | u->io_accounting_last[i] = UINT64_MAX; | |
126 | ||
87f0e418 LP |
127 | return u; |
128 | } | |
129 | ||
a581e45a | 130 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
dc409696 | 131 | _cleanup_(unit_freep) Unit *u = NULL; |
a581e45a LP |
132 | int r; |
133 | ||
134 | u = unit_new(m, size); | |
135 | if (!u) | |
136 | return -ENOMEM; | |
137 | ||
138 | r = unit_add_name(u, name); | |
dc409696 | 139 | if (r < 0) |
a581e45a | 140 | return r; |
a581e45a | 141 | |
1cc6c93a YW |
142 | *ret = TAKE_PTR(u); |
143 | ||
a581e45a LP |
144 | return r; |
145 | } | |
146 | ||
303ee601 | 147 | bool unit_has_name(const Unit *u, const char *name) { |
f278026d LP |
148 | assert(u); |
149 | assert(name); | |
150 | ||
4562c355 ZJS |
151 | return streq_ptr(name, u->id) || |
152 | set_contains(u->aliases, name); | |
f278026d LP |
153 | } |
154 | ||
598459ce LP |
155 | static void unit_init(Unit *u) { |
156 | CGroupContext *cc; | |
157 | ExecContext *ec; | |
158 | KillContext *kc; | |
159 | ||
160 | assert(u); | |
161 | assert(u->manager); | |
162 | assert(u->type >= 0); | |
163 | ||
164 | cc = unit_get_cgroup_context(u); | |
165 | if (cc) { | |
166 | cgroup_context_init(cc); | |
167 | ||
168 | /* Copy in the manager defaults into the cgroup | |
169 | * context, _before_ the rest of the settings have | |
170 | * been initialized */ | |
171 | ||
172 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
13c31542 | 173 | cc->io_accounting = u->manager->default_io_accounting; |
598459ce LP |
174 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
175 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 176 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
6a48d82f | 177 | cc->ip_accounting = u->manager->default_ip_accounting; |
0af20ea2 LP |
178 | |
179 | if (u->type != UNIT_SLICE) | |
180 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
181 | } |
182 | ||
183 | ec = unit_get_exec_context(u); | |
b1edf445 | 184 | if (ec) { |
598459ce LP |
185 | exec_context_init(ec); |
186 | ||
5e37d193 FB |
187 | if (MANAGER_IS_SYSTEM(u->manager)) |
188 | ec->keyring_mode = EXEC_KEYRING_SHARED; | |
189 | else { | |
190 | ec->keyring_mode = EXEC_KEYRING_INHERIT; | |
191 | ||
192 | /* User manager might have its umask redefined by PAM or UMask=. In this | |
193 | * case let the units it manages inherit this value by default. They can | |
194 | * still tune this value through their own unit file */ | |
195 | (void) get_process_umask(getpid_cached(), &ec->umask); | |
196 | } | |
b1edf445 LP |
197 | } |
198 | ||
598459ce LP |
199 | kc = unit_get_kill_context(u); |
200 | if (kc) | |
201 | kill_context_init(kc); | |
202 | ||
203 | if (UNIT_VTABLE(u)->init) | |
204 | UNIT_VTABLE(u)->init(u); | |
205 | } | |
206 | ||
4562c355 ZJS |
207 | static int unit_add_alias(Unit *u, char *donated_name) { |
208 | int r; | |
209 | ||
210 | /* Make sure that u->names is allocated. We may leave u->names | |
211 | * empty if we fail later, but this is not a problem. */ | |
212 | r = set_ensure_allocated(&u->aliases, &string_hash_ops); | |
213 | if (r < 0) | |
214 | return r; | |
215 | ||
216 | r = set_put(u->aliases, donated_name); | |
217 | if (r < 0) | |
218 | return r; | |
219 | assert(r > 0); | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
87f0e418 | 224 | int unit_add_name(Unit *u, const char *text) { |
4562c355 | 225 | _cleanup_free_ char *name = NULL, *instance = NULL; |
87f0e418 | 226 | UnitType t; |
87f0e418 LP |
227 | int r; |
228 | ||
229 | assert(u); | |
230 | assert(text); | |
231 | ||
7410616c | 232 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 233 | if (!u->instance) |
acd1987a WY |
234 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
235 | "instance is not set when adding name '%s': %m", text); | |
87f0e418 | 236 | |
4562c355 | 237 | r = unit_name_replace_instance(text, u->instance, &name); |
7410616c | 238 | if (r < 0) |
acd1987a WY |
239 | return log_unit_debug_errno(u, r, |
240 | "failed to build instance name from '%s': %m", text); | |
7410616c | 241 | } else { |
4562c355 ZJS |
242 | name = strdup(text); |
243 | if (!name) | |
7410616c LP |
244 | return -ENOMEM; |
245 | } | |
87f0e418 | 246 | |
4562c355 | 247 | if (unit_has_name(u, name)) |
7410616c | 248 | return 0; |
4562c355 ZJS |
249 | |
250 | if (hashmap_contains(u->manager->units, name)) | |
acd1987a | 251 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EEXIST), |
4562c355 | 252 | "unit already exist when adding name '%s': %m", name); |
7410616c | 253 | |
4562c355 | 254 | if (!unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) |
acd1987a | 255 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
4562c355 | 256 | "name '%s' is invalid: %m", name); |
e537352b | 257 | |
4562c355 | 258 | t = unit_name_to_type(name); |
7410616c | 259 | if (t < 0) |
acd1987a | 260 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
4562c355 | 261 | "failed to to derive unit type from name '%s': %m", name); |
87f0e418 | 262 | |
598459ce | 263 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
acd1987a WY |
264 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
265 | "unit type is illegal: u->type(%d) and t(%d) for name '%s': %m", | |
4562c355 | 266 | u->type, t, name); |
87f0e418 | 267 | |
4562c355 | 268 | r = unit_name_to_instance(name, &instance); |
e48614c4 | 269 | if (r < 0) |
4562c355 | 270 | return log_unit_debug_errno(u, r, "failed to extract instance from name '%s': %m", name); |
87f0e418 | 271 | |
4562c355 ZJS |
272 | if (instance && !unit_type_may_template(t)) |
273 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), "templates are not allowed for name '%s': %m", name); | |
9e2f7c11 | 274 | |
d383acad ZJS |
275 | /* Ensure that this unit either has no instance, or that the instance matches. */ |
276 | if (u->type != _UNIT_TYPE_INVALID && !streq_ptr(u->instance, instance)) | |
acd1987a | 277 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
ada4b34e ZJS |
278 | "cannot add name %s, the instances don't match (\"%s\" != \"%s\").", |
279 | name, instance, u->instance); | |
9e2f7c11 | 280 | |
4562c355 | 281 | if (u->id && !unit_type_may_alias(t)) |
ada4b34e ZJS |
282 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EEXIST), |
283 | "cannot add name %s, aliases are not allowed for %s units.", | |
284 | name, unit_type_to_string(t)); | |
9e2f7c11 | 285 | |
598459ce | 286 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
ada4b34e | 287 | return log_unit_warning_errno(u, SYNTHETIC_ERRNO(E2BIG), "cannot add name, manager has too many units: %m"); |
4f0f902f | 288 | |
4562c355 ZJS |
289 | /* Add name to the global hashmap first, because that's easier to undo */ |
290 | r = hashmap_put(u->manager->units, name, u); | |
7410616c | 291 | if (r < 0) |
acd1987a | 292 | return log_unit_debug_errno(u, r, "add unit to hashmap failed for name '%s': %m", text); |
87f0e418 | 293 | |
4562c355 ZJS |
294 | if (u->id) { |
295 | r = unit_add_alias(u, name); /* unit_add_alias() takes ownership of the name on success */ | |
296 | if (r < 0) { | |
297 | hashmap_remove(u->manager->units, name); | |
298 | return r; | |
299 | } | |
300 | TAKE_PTR(name); | |
301 | ||
302 | } else { | |
303 | /* A new name, we don't need the set yet. */ | |
304 | assert(u->type == _UNIT_TYPE_INVALID); | |
305 | assert(!u->instance); | |
306 | ||
ac155bb8 | 307 | u->type = t; |
4562c355 ZJS |
308 | u->id = TAKE_PTR(name); |
309 | u->instance = TAKE_PTR(instance); | |
9e2f7c11 | 310 | |
71fda00f | 311 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
598459ce | 312 | unit_init(u); |
598459ce | 313 | } |
9e2f7c11 | 314 | |
598459ce LP |
315 | unit_add_to_dbus_queue(u); |
316 | return 0; | |
87f0e418 LP |
317 | } |
318 | ||
0ae97ec1 | 319 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 320 | _cleanup_free_ char *t = NULL; |
4562c355 | 321 | char *s; |
276c3e78 | 322 | int r; |
0ae97ec1 LP |
323 | |
324 | assert(u); | |
325 | assert(name); | |
326 | ||
7410616c | 327 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 328 | if (!u->instance) |
9e2f7c11 LP |
329 | return -EINVAL; |
330 | ||
7410616c LP |
331 | r = unit_name_replace_instance(name, u->instance, &t); |
332 | if (r < 0) | |
333 | return r; | |
9e2f7c11 LP |
334 | |
335 | name = t; | |
336 | } | |
337 | ||
4562c355 ZJS |
338 | if (streq_ptr(u->id, name)) |
339 | return 0; /* Nothing to do. */ | |
340 | ||
341 | /* Selects one of the aliases of this unit as the id */ | |
342 | s = set_get(u->aliases, (char*) name); | |
9e2f7c11 | 343 | if (!s) |
0ae97ec1 LP |
344 | return -ENOENT; |
345 | ||
4562c355 ZJS |
346 | if (u->id) { |
347 | r = set_remove_and_put(u->aliases, name, u->id); | |
348 | if (r < 0) | |
349 | return r; | |
350 | } else | |
351 | assert_se(set_remove(u->aliases, name)); /* see set_get() above… */ | |
276c3e78 | 352 | |
4562c355 | 353 | u->id = s; /* Old u->id is now stored in the set, and s is not stored anywhere */ |
c1e1601e | 354 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 355 | |
0ae97ec1 LP |
356 | return 0; |
357 | } | |
358 | ||
f50e0a01 | 359 | int unit_set_description(Unit *u, const char *description) { |
84b26d51 | 360 | int r; |
f50e0a01 LP |
361 | |
362 | assert(u); | |
363 | ||
84b26d51 LP |
364 | r = free_and_strdup(&u->description, empty_to_null(description)); |
365 | if (r < 0) | |
366 | return r; | |
367 | if (r > 0) | |
368 | unit_add_to_dbus_queue(u); | |
c1e1601e | 369 | |
f50e0a01 LP |
370 | return 0; |
371 | } | |
372 | ||
f2f725e5 | 373 | bool unit_may_gc(Unit *u) { |
a354329f | 374 | UnitActiveState state; |
e98b2fbb | 375 | int r; |
5afe510c | 376 | |
701cc384 LP |
377 | assert(u); |
378 | ||
f2f725e5 ZJS |
379 | /* Checks whether the unit is ready to be unloaded for garbage collection. |
380 | * Returns true when the unit may be collected, and false if there's some | |
2641f02e ZJS |
381 | * reason to keep it loaded. |
382 | * | |
383 | * References from other units are *not* checked here. Instead, this is done | |
384 | * in unit_gc_sweep(), but using markers to properly collect dependency loops. | |
385 | */ | |
5afe510c | 386 | |
a354329f | 387 | if (u->job) |
f2f725e5 | 388 | return false; |
701cc384 | 389 | |
a354329f | 390 | if (u->nop_job) |
f2f725e5 | 391 | return false; |
6c073082 | 392 | |
a354329f LP |
393 | state = unit_active_state(u); |
394 | ||
7eb2a8a1 | 395 | /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */ |
a354329f LP |
396 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && |
397 | UNIT_VTABLE(u)->release_resources) | |
7eb2a8a1 | 398 | UNIT_VTABLE(u)->release_resources(u); |
a354329f | 399 | |
f5869324 | 400 | if (u->perpetual) |
f2f725e5 | 401 | return false; |
9d576438 | 402 | |
05a98afd | 403 | if (sd_bus_track_count(u->bus_track) > 0) |
f2f725e5 | 404 | return false; |
05a98afd | 405 | |
5afe510c LP |
406 | /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */ |
407 | switch (u->collect_mode) { | |
408 | ||
409 | case COLLECT_INACTIVE: | |
410 | if (state != UNIT_INACTIVE) | |
f2f725e5 | 411 | return false; |
5afe510c LP |
412 | |
413 | break; | |
414 | ||
415 | case COLLECT_INACTIVE_OR_FAILED: | |
416 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
f2f725e5 | 417 | return false; |
5afe510c LP |
418 | |
419 | break; | |
420 | ||
421 | default: | |
422 | assert_not_reached("Unknown garbage collection mode"); | |
423 | } | |
424 | ||
e98b2fbb LP |
425 | if (u->cgroup_path) { |
426 | /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay | |
427 | * around. Units with active processes should never be collected. */ | |
428 | ||
429 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
430 | if (r < 0) | |
431 | log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", u->cgroup_path); | |
432 | if (r <= 0) | |
f2f725e5 | 433 | return false; |
e98b2fbb LP |
434 | } |
435 | ||
f2f725e5 ZJS |
436 | if (UNIT_VTABLE(u)->may_gc && !UNIT_VTABLE(u)->may_gc(u)) |
437 | return false; | |
701cc384 | 438 | |
f2f725e5 | 439 | return true; |
701cc384 LP |
440 | } |
441 | ||
87f0e418 LP |
442 | void unit_add_to_load_queue(Unit *u) { |
443 | assert(u); | |
ac155bb8 | 444 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 445 | |
ac155bb8 | 446 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
447 | return; |
448 | ||
71fda00f | 449 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 450 | u->in_load_queue = true; |
87f0e418 LP |
451 | } |
452 | ||
23a177ef LP |
453 | void unit_add_to_cleanup_queue(Unit *u) { |
454 | assert(u); | |
455 | ||
ac155bb8 | 456 | if (u->in_cleanup_queue) |
23a177ef LP |
457 | return; |
458 | ||
71fda00f | 459 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 460 | u->in_cleanup_queue = true; |
23a177ef LP |
461 | } |
462 | ||
701cc384 LP |
463 | void unit_add_to_gc_queue(Unit *u) { |
464 | assert(u); | |
465 | ||
ac155bb8 | 466 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
467 | return; |
468 | ||
f2f725e5 | 469 | if (!unit_may_gc(u)) |
701cc384 LP |
470 | return; |
471 | ||
c5a97ed1 | 472 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 473 | u->in_gc_queue = true; |
701cc384 LP |
474 | } |
475 | ||
c1e1601e LP |
476 | void unit_add_to_dbus_queue(Unit *u) { |
477 | assert(u); | |
ac155bb8 | 478 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 479 | |
ac155bb8 | 480 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
481 | return; |
482 | ||
a567261a | 483 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 484 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 485 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 486 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 487 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
488 | return; |
489 | } | |
490 | ||
71fda00f | 491 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 492 | u->in_dbus_queue = true; |
c1e1601e LP |
493 | } |
494 | ||
fda09318 | 495 | void unit_submit_to_stop_when_unneeded_queue(Unit *u) { |
a3c1168a LP |
496 | assert(u); |
497 | ||
498 | if (u->in_stop_when_unneeded_queue) | |
499 | return; | |
500 | ||
501 | if (!u->stop_when_unneeded) | |
502 | return; | |
503 | ||
504 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
505 | return; | |
506 | ||
507 | LIST_PREPEND(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
508 | u->in_stop_when_unneeded_queue = true; | |
509 | } | |
510 | ||
eef85c4a | 511 | static void bidi_set_free(Unit *u, Hashmap *h) { |
87f0e418 | 512 | Unit *other; |
eef85c4a LP |
513 | Iterator i; |
514 | void *v; | |
87f0e418 LP |
515 | |
516 | assert(u); | |
517 | ||
eef85c4a | 518 | /* Frees the hashmap and makes sure we are dropped from the inverse pointers */ |
87f0e418 | 519 | |
eef85c4a | 520 | HASHMAP_FOREACH_KEY(v, other, h, i) { |
f6173cb9 | 521 | for (UnitDependency d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
eef85c4a | 522 | hashmap_remove(other->dependencies[d], u); |
701cc384 LP |
523 | |
524 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
525 | } |
526 | ||
eef85c4a | 527 | hashmap_free(h); |
87f0e418 LP |
528 | } |
529 | ||
c2756a68 LP |
530 | static void unit_remove_transient(Unit *u) { |
531 | char **i; | |
532 | ||
533 | assert(u); | |
534 | ||
535 | if (!u->transient) | |
536 | return; | |
537 | ||
538 | if (u->fragment_path) | |
3f5e8115 | 539 | (void) unlink(u->fragment_path); |
c2756a68 LP |
540 | |
541 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 542 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 543 | |
39591351 LP |
544 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
545 | if (!p) | |
546 | continue; | |
547 | ||
548 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
549 | if (!pp) | |
550 | continue; | |
551 | ||
552 | /* Only drop transient drop-ins */ | |
553 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
554 | continue; | |
c2756a68 | 555 | |
39591351 LP |
556 | (void) unlink(*i); |
557 | (void) rmdir(p); | |
c2756a68 LP |
558 | } |
559 | } | |
560 | ||
a57f7e2c | 561 | static void unit_free_requires_mounts_for(Unit *u) { |
eef85c4a | 562 | assert(u); |
a57f7e2c | 563 | |
eef85c4a LP |
564 | for (;;) { |
565 | _cleanup_free_ char *path; | |
a57f7e2c | 566 | |
eef85c4a LP |
567 | path = hashmap_steal_first_key(u->requires_mounts_for); |
568 | if (!path) | |
569 | break; | |
570 | else { | |
571 | char s[strlen(path) + 1]; | |
a57f7e2c | 572 | |
eef85c4a LP |
573 | PATH_FOREACH_PREFIX_MORE(s, path) { |
574 | char *y; | |
575 | Set *x; | |
576 | ||
577 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
578 | if (!x) | |
579 | continue; | |
a57f7e2c | 580 | |
eef85c4a | 581 | (void) set_remove(x, u); |
a57f7e2c | 582 | |
eef85c4a LP |
583 | if (set_isempty(x)) { |
584 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
585 | free(y); | |
586 | set_free(x); | |
587 | } | |
a57f7e2c LP |
588 | } |
589 | } | |
590 | } | |
591 | ||
eef85c4a | 592 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
a57f7e2c LP |
593 | } |
594 | ||
598459ce LP |
595 | static void unit_done(Unit *u) { |
596 | ExecContext *ec; | |
597 | CGroupContext *cc; | |
598 | ||
599 | assert(u); | |
600 | ||
601 | if (u->type < 0) | |
602 | return; | |
603 | ||
604 | if (UNIT_VTABLE(u)->done) | |
605 | UNIT_VTABLE(u)->done(u); | |
606 | ||
607 | ec = unit_get_exec_context(u); | |
608 | if (ec) | |
609 | exec_context_done(ec); | |
610 | ||
611 | cc = unit_get_cgroup_context(u); | |
612 | if (cc) | |
613 | cgroup_context_done(cc); | |
614 | } | |
615 | ||
87f0e418 | 616 | void unit_free(Unit *u) { |
87f0e418 LP |
617 | Iterator i; |
618 | char *t; | |
619 | ||
c9d5c9c0 LP |
620 | if (!u) |
621 | return; | |
87f0e418 | 622 | |
b8b6f321 LP |
623 | if (UNIT_ISSET(u->slice)) { |
624 | /* A unit is being dropped from the tree, make sure our parent slice recalculates the member mask */ | |
625 | unit_invalidate_cgroup_members_masks(UNIT_DEREF(u->slice)); | |
626 | ||
627 | /* And make sure the parent is realized again, updating cgroup memberships */ | |
628 | unit_add_to_cgroup_realize_queue(UNIT_DEREF(u->slice)); | |
629 | } | |
630 | ||
50fb00b7 | 631 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 632 | |
2c289ea8 | 633 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
634 | unit_remove_transient(u); |
635 | ||
c1e1601e LP |
636 | bus_unit_send_removed_signal(u); |
637 | ||
598459ce | 638 | unit_done(u); |
a013b84b | 639 | |
50be4f4a | 640 | unit_dequeue_rewatch_pids(u); |
cf9fd508 | 641 | |
50be4f4a | 642 | sd_bus_slot_unref(u->match_bus_slot); |
05a98afd LP |
643 | sd_bus_track_unref(u->bus_track); |
644 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
d9e45bc3 | 645 | u->pending_freezer_message = sd_bus_message_unref(u->pending_freezer_message); |
05a98afd | 646 | |
a57f7e2c LP |
647 | unit_free_requires_mounts_for(u); |
648 | ||
4562c355 | 649 | SET_FOREACH(t, u->aliases, i) |
ac155bb8 | 650 | hashmap_remove_value(u->manager->units, t, u); |
4562c355 ZJS |
651 | if (u->id) |
652 | hashmap_remove_value(u->manager->units, u->id, u); | |
87f0e418 | 653 | |
4b58153d LP |
654 | if (!sd_id128_is_null(u->invocation_id)) |
655 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
656 | ||
97e7d748 MS |
657 | if (u->job) { |
658 | Job *j = u->job; | |
659 | job_uninstall(j); | |
660 | job_free(j); | |
661 | } | |
964e0949 | 662 | |
e0209d83 MS |
663 | if (u->nop_job) { |
664 | Job *j = u->nop_job; | |
665 | job_uninstall(j); | |
666 | job_free(j); | |
667 | } | |
668 | ||
f6173cb9 | 669 | for (UnitDependency d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 670 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 671 | |
adefcf28 LP |
672 | if (u->on_console) |
673 | manager_unref_console(u->manager); | |
674 | ||
efdb0237 | 675 | unit_release_cgroup(u); |
72673e86 | 676 | |
d3070fbd LP |
677 | if (!MANAGER_IS_RELOADING(u->manager)) |
678 | unit_unlink_state_files(u); | |
679 | ||
00d9ef85 LP |
680 | unit_unref_uid_gid(u, false); |
681 | ||
5269eb6b | 682 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 683 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 684 | |
a911bb9a LP |
685 | unit_unwatch_all_pids(u); |
686 | ||
702a2d8f | 687 | unit_ref_unset(&u->slice); |
7f7d01ed ZJS |
688 | while (u->refs_by_target) |
689 | unit_ref_unset(u->refs_by_target); | |
57020a3a | 690 | |
ac155bb8 | 691 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 692 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 693 | |
ac155bb8 | 694 | if (u->in_load_queue) |
71fda00f | 695 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 696 | |
ac155bb8 | 697 | if (u->in_dbus_queue) |
71fda00f | 698 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 699 | |
a2d72e26 | 700 | if (u->in_gc_queue) |
c5a97ed1 | 701 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 702 | |
91a6073e LP |
703 | if (u->in_cgroup_realize_queue) |
704 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 705 | |
09e24654 LP |
706 | if (u->in_cgroup_empty_queue) |
707 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
708 | ||
1bdf2790 ZJS |
709 | if (u->in_cleanup_queue) |
710 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
adefcf28 | 711 | |
19496554 MS |
712 | if (u->in_target_deps_queue) |
713 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
714 | ||
a3c1168a LP |
715 | if (u->in_stop_when_unneeded_queue) |
716 | LIST_REMOVE(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
717 | ||
6a48d82f DM |
718 | safe_close(u->ip_accounting_ingress_map_fd); |
719 | safe_close(u->ip_accounting_egress_map_fd); | |
72673e86 | 720 | |
6a48d82f DM |
721 | safe_close(u->ipv4_allow_map_fd); |
722 | safe_close(u->ipv6_allow_map_fd); | |
723 | safe_close(u->ipv4_deny_map_fd); | |
724 | safe_close(u->ipv6_deny_map_fd); | |
d3070fbd | 725 | |
6a48d82f | 726 | bpf_program_unref(u->ip_bpf_ingress); |
aa2b6f1d | 727 | bpf_program_unref(u->ip_bpf_ingress_installed); |
6a48d82f | 728 | bpf_program_unref(u->ip_bpf_egress); |
aa2b6f1d | 729 | bpf_program_unref(u->ip_bpf_egress_installed); |
00d9ef85 | 730 | |
fab34748 KL |
731 | set_free(u->ip_bpf_custom_ingress); |
732 | set_free(u->ip_bpf_custom_egress); | |
733 | set_free(u->ip_bpf_custom_ingress_installed); | |
734 | set_free(u->ip_bpf_custom_egress_installed); | |
735 | ||
084c7007 RG |
736 | bpf_program_unref(u->bpf_device_control_installed); |
737 | ||
a946fa9b ZJS |
738 | condition_free_list(u->conditions); |
739 | condition_free_list(u->asserts); | |
f755e3b7 | 740 | |
ac155bb8 | 741 | free(u->description); |
49dbfa7b | 742 | strv_free(u->documentation); |
ac155bb8 | 743 | free(u->fragment_path); |
1b64d026 | 744 | free(u->source_path); |
ae7a7182 | 745 | strv_free(u->dropin_paths); |
ac155bb8 | 746 | free(u->instance); |
87f0e418 | 747 | |
f189ab18 | 748 | free(u->job_timeout_reboot_arg); |
6bf0f408 LP |
749 | free(u->reboot_arg); |
750 | ||
4562c355 ZJS |
751 | set_free_free(u->aliases); |
752 | free(u->id); | |
753 | ||
87f0e418 LP |
754 | free(u); |
755 | } | |
756 | ||
d9e45bc3 MS |
757 | FreezerState unit_freezer_state(Unit *u) { |
758 | assert(u); | |
759 | ||
760 | return u->freezer_state; | |
761 | } | |
762 | ||
763 | int unit_freezer_state_kernel(Unit *u, FreezerState *ret) { | |
764 | char *values[1] = {}; | |
765 | int r; | |
766 | ||
767 | assert(u); | |
768 | ||
769 | r = cg_get_keyed_attribute(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "cgroup.events", | |
770 | STRV_MAKE("frozen"), values); | |
771 | if (r < 0) | |
772 | return r; | |
773 | ||
774 | r = _FREEZER_STATE_INVALID; | |
775 | ||
776 | if (values[0]) { | |
777 | if (streq(values[0], "0")) | |
778 | r = FREEZER_RUNNING; | |
779 | else if (streq(values[0], "1")) | |
780 | r = FREEZER_FROZEN; | |
781 | } | |
782 | ||
783 | free(values[0]); | |
784 | *ret = r; | |
785 | ||
786 | return 0; | |
787 | } | |
788 | ||
87f0e418 LP |
789 | UnitActiveState unit_active_state(Unit *u) { |
790 | assert(u); | |
791 | ||
ac155bb8 | 792 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
793 | return unit_active_state(unit_follow_merge(u)); |
794 | ||
795 | /* After a reload it might happen that a unit is not correctly | |
796 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 797 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
798 | |
799 | return UNIT_VTABLE(u)->active_state(u); | |
800 | } | |
801 | ||
10a94420 LP |
802 | const char* unit_sub_state_to_string(Unit *u) { |
803 | assert(u); | |
804 | ||
805 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
806 | } | |
807 | ||
eef85c4a | 808 | static int hashmap_complete_move(Hashmap **s, Hashmap **other) { |
23a177ef LP |
809 | assert(s); |
810 | assert(other); | |
87f0e418 | 811 | |
23a177ef | 812 | if (!*other) |
7c0b05e5 | 813 | return 0; |
87f0e418 | 814 | |
eef85c4a LP |
815 | if (*s) |
816 | return hashmap_move(*s, *other); | |
ae2a15bc LP |
817 | else |
818 | *s = TAKE_PTR(*other); | |
7c0b05e5 MS |
819 | |
820 | return 0; | |
23a177ef | 821 | } |
87f0e418 | 822 | |
7c0b05e5 | 823 | static int merge_names(Unit *u, Unit *other) { |
4562c355 | 824 | char *name; |
23a177ef | 825 | Iterator i; |
7c0b05e5 | 826 | int r; |
87f0e418 | 827 | |
23a177ef LP |
828 | assert(u); |
829 | assert(other); | |
830 | ||
4562c355 | 831 | r = unit_add_alias(u, other->id); |
7c0b05e5 MS |
832 | if (r < 0) |
833 | return r; | |
23a177ef | 834 | |
4562c355 ZJS |
835 | r = set_move(u->aliases, other->aliases); |
836 | if (r < 0) { | |
837 | set_remove(u->aliases, other->id); | |
838 | return r; | |
839 | } | |
23a177ef | 840 | |
4562c355 ZJS |
841 | TAKE_PTR(other->id); |
842 | other->aliases = set_free_free(other->aliases); | |
23a177ef | 843 | |
4562c355 ZJS |
844 | SET_FOREACH(name, u->aliases, i) |
845 | assert_se(hashmap_replace(u->manager->units, name, u) == 0); | |
7c0b05e5 MS |
846 | |
847 | return 0; | |
87f0e418 LP |
848 | } |
849 | ||
09a65f92 MS |
850 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
851 | unsigned n_reserve; | |
852 | ||
853 | assert(u); | |
854 | assert(other); | |
855 | assert(d < _UNIT_DEPENDENCY_MAX); | |
856 | ||
857 | /* | |
858 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 859 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
860 | * as a whole to u by complete_move(). |
861 | */ | |
862 | if (!u->dependencies[d]) | |
863 | return 0; | |
864 | ||
865 | /* merge_dependencies() will skip a u-on-u dependency */ | |
eef85c4a | 866 | n_reserve = hashmap_size(other->dependencies[d]) - !!hashmap_get(other->dependencies[d], u); |
09a65f92 | 867 | |
eef85c4a | 868 | return hashmap_reserve(u->dependencies[d], n_reserve); |
09a65f92 MS |
869 | } |
870 | ||
d1fab3fe | 871 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
872 | Iterator i; |
873 | Unit *back; | |
eef85c4a | 874 | void *v; |
87f0e418 | 875 | int r; |
23a177ef | 876 | |
eef85c4a LP |
877 | /* Merges all dependencies of type 'd' of the unit 'other' into the deps of the unit 'u' */ |
878 | ||
23a177ef LP |
879 | assert(u); |
880 | assert(other); | |
881 | assert(d < _UNIT_DEPENDENCY_MAX); | |
882 | ||
5238e957 | 883 | /* Fix backwards pointers. Let's iterate through all dependent units of the other unit. */ |
f6173cb9 | 884 | HASHMAP_FOREACH_KEY(v, back, other->dependencies[d], i) |
eef85c4a | 885 | |
f6173cb9 ZJS |
886 | /* Let's now iterate through the dependencies of that dependencies of the other units, |
887 | * looking for pointers back, and let's fix them up, to instead point to 'u'. */ | |
888 | for (UnitDependency k = 0; k < _UNIT_DEPENDENCY_MAX; k++) | |
e66047ff | 889 | if (back == u) { |
eef85c4a LP |
890 | /* Do not add dependencies between u and itself. */ |
891 | if (hashmap_remove(back->dependencies[k], other)) | |
f2341e0a | 892 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff | 893 | } else { |
f6173cb9 | 894 | UnitDependencyInfo di_u, di_other; |
eef85c4a LP |
895 | |
896 | /* Let's drop this dependency between "back" and "other", and let's create it between | |
897 | * "back" and "u" instead. Let's merge the bit masks of the dependency we are moving, | |
898 | * and any such dependency which might already exist */ | |
899 | ||
900 | di_other.data = hashmap_get(back->dependencies[k], other); | |
901 | if (!di_other.data) | |
902 | continue; /* dependency isn't set, let's try the next one */ | |
903 | ||
904 | di_u.data = hashmap_get(back->dependencies[k], u); | |
905 | ||
f6173cb9 | 906 | UnitDependencyInfo di_merged = { |
eef85c4a LP |
907 | .origin_mask = di_u.origin_mask | di_other.origin_mask, |
908 | .destination_mask = di_u.destination_mask | di_other.destination_mask, | |
909 | }; | |
910 | ||
911 | r = hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data); | |
912 | if (r < 0) | |
913 | log_warning_errno(r, "Failed to remove/replace: back=%s other=%s u=%s: %m", back->id, other_id, u->id); | |
914 | assert(r >= 0); | |
915 | ||
916 | /* assert_se(hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data) >= 0); */ | |
e66047ff | 917 | } |
23a177ef | 918 | |
e66047ff | 919 | /* Also do not move dependencies on u to itself */ |
eef85c4a | 920 | back = hashmap_remove(other->dependencies[d], u); |
d1fab3fe | 921 | if (back) |
f2341e0a | 922 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 923 | |
7c0b05e5 | 924 | /* The move cannot fail. The caller must have performed a reservation. */ |
eef85c4a | 925 | assert_se(hashmap_complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); |
23a177ef | 926 | |
eef85c4a | 927 | other->dependencies[d] = hashmap_free(other->dependencies[d]); |
23a177ef LP |
928 | } |
929 | ||
930 | int unit_merge(Unit *u, Unit *other) { | |
d1fab3fe | 931 | const char *other_id = NULL; |
09a65f92 | 932 | int r; |
87f0e418 LP |
933 | |
934 | assert(u); | |
935 | assert(other); | |
ac155bb8 MS |
936 | assert(u->manager == other->manager); |
937 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 938 | |
cc916967 LP |
939 | other = unit_follow_merge(other); |
940 | ||
23a177ef LP |
941 | if (other == u) |
942 | return 0; | |
943 | ||
ac155bb8 | 944 | if (u->type != other->type) |
9e2f7c11 LP |
945 | return -EINVAL; |
946 | ||
8a993b61 | 947 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
948 | return -EEXIST; |
949 | ||
ec2ce0c5 | 950 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 951 | return -EEXIST; |
87f0e418 | 952 | |
d383acad ZJS |
953 | if (!streq_ptr(u->instance, other->instance)) |
954 | return -EINVAL; | |
955 | ||
ac155bb8 | 956 | if (other->job) |
819e213f LP |
957 | return -EEXIST; |
958 | ||
e0209d83 MS |
959 | if (other->nop_job) |
960 | return -EEXIST; | |
961 | ||
fdf20a31 | 962 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
963 | return -EEXIST; |
964 | ||
d1fab3fe ZJS |
965 | if (other->id) |
966 | other_id = strdupa(other->id); | |
967 | ||
09a65f92 | 968 | /* Make reservations to ensure merge_dependencies() won't fail */ |
f6173cb9 | 969 | for (UnitDependency d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
09a65f92 MS |
970 | r = reserve_dependencies(u, other, d); |
971 | /* | |
972 | * We don't rollback reservations if we fail. We don't have | |
973 | * a way to undo reservations. A reservation is not a leak. | |
974 | */ | |
975 | if (r < 0) | |
976 | return r; | |
977 | } | |
978 | ||
87f0e418 | 979 | /* Merge names */ |
7c0b05e5 MS |
980 | r = merge_names(u, other); |
981 | if (r < 0) | |
982 | return r; | |
87f0e418 | 983 | |
57020a3a | 984 | /* Redirect all references */ |
7f7d01ed ZJS |
985 | while (other->refs_by_target) |
986 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
57020a3a | 987 | |
87f0e418 | 988 | /* Merge dependencies */ |
f6173cb9 | 989 | for (UnitDependency d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
d1fab3fe | 990 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 991 | |
ac155bb8 MS |
992 | other->load_state = UNIT_MERGED; |
993 | other->merged_into = u; | |
23a177ef | 994 | |
3616a49c LP |
995 | /* If there is still some data attached to the other node, we |
996 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 997 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
998 | if (UNIT_VTABLE(other)->done) |
999 | UNIT_VTABLE(other)->done(other); | |
1000 | ||
1001 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
1002 | unit_add_to_cleanup_queue(other); |
1003 | ||
1004 | return 0; | |
1005 | } | |
1006 | ||
1007 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 1008 | _cleanup_free_ char *s = NULL; |
23a177ef | 1009 | Unit *other; |
9e2f7c11 | 1010 | int r; |
23a177ef | 1011 | |
e8630e69 ZJS |
1012 | /* Either add name to u, or if a unit with name already exists, merge it with u. |
1013 | * If name is a template, do the same for name@instance, where instance is u's instance. */ | |
1014 | ||
23a177ef LP |
1015 | assert(u); |
1016 | assert(name); | |
1017 | ||
7410616c | 1018 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 1019 | if (!u->instance) |
9e2f7c11 LP |
1020 | return -EINVAL; |
1021 | ||
7410616c LP |
1022 | r = unit_name_replace_instance(name, u->instance, &s); |
1023 | if (r < 0) | |
1024 | return r; | |
9e2f7c11 LP |
1025 | |
1026 | name = s; | |
1027 | } | |
1028 | ||
c2756a68 | 1029 | other = manager_get_unit(u->manager, name); |
7410616c LP |
1030 | if (other) |
1031 | return unit_merge(u, other); | |
23a177ef | 1032 | |
7410616c | 1033 | return unit_add_name(u, name); |
23a177ef LP |
1034 | } |
1035 | ||
1036 | Unit* unit_follow_merge(Unit *u) { | |
1037 | assert(u); | |
1038 | ||
ac155bb8 MS |
1039 | while (u->load_state == UNIT_MERGED) |
1040 | assert_se(u = u->merged_into); | |
23a177ef LP |
1041 | |
1042 | return u; | |
1043 | } | |
1044 | ||
1045 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
ada5e276 YW |
1046 | ExecDirectoryType dt; |
1047 | char **dp; | |
23a177ef LP |
1048 | int r; |
1049 | ||
1050 | assert(u); | |
1051 | assert(c); | |
1052 | ||
e1e74614 | 1053 | if (c->working_directory && !c->working_directory_missing_ok) { |
eef85c4a | 1054 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1055 | if (r < 0) |
1056 | return r; | |
1057 | } | |
1058 | ||
1059 | if (c->root_directory) { | |
eef85c4a | 1060 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1061 | if (r < 0) |
1062 | return r; | |
1063 | } | |
1064 | ||
915e6d16 | 1065 | if (c->root_image) { |
eef85c4a | 1066 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
1067 | if (r < 0) |
1068 | return r; | |
1069 | } | |
1070 | ||
72fd1768 | 1071 | for (dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
1072 | if (!u->manager->prefix[dt]) |
1073 | continue; | |
1074 | ||
1075 | STRV_FOREACH(dp, c->directories[dt].paths) { | |
1076 | _cleanup_free_ char *p; | |
1077 | ||
657ee2d8 | 1078 | p = path_join(u->manager->prefix[dt], *dp); |
ada5e276 YW |
1079 | if (!p) |
1080 | return -ENOMEM; | |
1081 | ||
eef85c4a | 1082 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
1083 | if (r < 0) |
1084 | return r; | |
1085 | } | |
1086 | } | |
1087 | ||
463d0d15 | 1088 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
1089 | return 0; |
1090 | ||
f3b7a79b LP |
1091 | /* For the following three directory types we need write access, and /var/ is possibly on the root |
1092 | * fs. Hence order after systemd-remount-fs.service, to ensure things are writable. */ | |
1093 | if (!strv_isempty(c->directories[EXEC_DIRECTORY_STATE].paths) || | |
1094 | !strv_isempty(c->directories[EXEC_DIRECTORY_CACHE].paths) || | |
1095 | !strv_isempty(c->directories[EXEC_DIRECTORY_LOGS].paths)) { | |
1096 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, true, UNIT_DEPENDENCY_FILE); | |
1097 | if (r < 0) | |
1098 | return r; | |
1099 | } | |
1100 | ||
b46a529c | 1101 | if (c->private_tmp) { |
d71f0505 LP |
1102 | const char *p; |
1103 | ||
1104 | FOREACH_STRING(p, "/tmp", "/var/tmp") { | |
eef85c4a | 1105 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
d71f0505 LP |
1106 | if (r < 0) |
1107 | return r; | |
1108 | } | |
b46a529c | 1109 | |
35d8c19a | 1110 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1111 | if (r < 0) |
1112 | return r; | |
1113 | } | |
1114 | ||
33b58dfb LP |
1115 | if (c->root_image) { |
1116 | /* We need to wait for /dev/loopX to appear when doing RootImage=, hence let's add an | |
1117 | * implicit dependency on udev */ | |
1118 | ||
1119 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_UDEVD_SERVICE, true, UNIT_DEPENDENCY_FILE); | |
1120 | if (r < 0) | |
1121 | return r; | |
1122 | } | |
1123 | ||
52c239d7 LB |
1124 | if (!IN_SET(c->std_output, |
1125 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1126 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
52c239d7 LB |
1127 | !IN_SET(c->std_error, |
1128 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1129 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
91dd5f7c | 1130 | !c->log_namespace) |
23a177ef LP |
1131 | return 0; |
1132 | ||
91dd5f7c LP |
1133 | /* If syslog or kernel logging is requested (or log namespacing is), make sure our own logging daemon |
1134 | * is run first. */ | |
1135 | ||
1136 | if (c->log_namespace) { | |
dc5437c7 | 1137 | _cleanup_free_ char *socket_unit = NULL, *varlink_socket_unit = NULL; |
23a177ef | 1138 | |
91dd5f7c LP |
1139 | r = unit_name_build_from_type("systemd-journald", c->log_namespace, UNIT_SOCKET, &socket_unit); |
1140 | if (r < 0) | |
1141 | return r; | |
1142 | ||
1143 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, socket_unit, true, UNIT_DEPENDENCY_FILE); | |
1144 | if (r < 0) | |
1145 | return r; | |
dc5437c7 LP |
1146 | |
1147 | r = unit_name_build_from_type("systemd-journald-varlink", c->log_namespace, UNIT_SOCKET, &varlink_socket_unit); | |
1148 | if (r < 0) | |
1149 | return r; | |
1150 | ||
1151 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, varlink_socket_unit, true, UNIT_DEPENDENCY_FILE); | |
1152 | if (r < 0) | |
1153 | return r; | |
91dd5f7c LP |
1154 | } else |
1155 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, true, UNIT_DEPENDENCY_FILE); | |
b46a529c LP |
1156 | if (r < 0) |
1157 | return r; | |
23a177ef | 1158 | |
87f0e418 LP |
1159 | return 0; |
1160 | } | |
1161 | ||
87f0e418 LP |
1162 | const char *unit_description(Unit *u) { |
1163 | assert(u); | |
1164 | ||
ac155bb8 MS |
1165 | if (u->description) |
1166 | return u->description; | |
87f0e418 | 1167 | |
ac155bb8 | 1168 | return strna(u->id); |
87f0e418 LP |
1169 | } |
1170 | ||
2a8f53c6 ZJS |
1171 | const char *unit_status_string(Unit *u) { |
1172 | assert(u); | |
1173 | ||
1174 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_NAME && u->id) | |
1175 | return u->id; | |
1176 | ||
1177 | return unit_description(u); | |
1178 | } | |
1179 | ||
eef85c4a LP |
1180 | static void print_unit_dependency_mask(FILE *f, const char *kind, UnitDependencyMask mask, bool *space) { |
1181 | const struct { | |
1182 | UnitDependencyMask mask; | |
1183 | const char *name; | |
1184 | } table[] = { | |
1185 | { UNIT_DEPENDENCY_FILE, "file" }, | |
1186 | { UNIT_DEPENDENCY_IMPLICIT, "implicit" }, | |
1187 | { UNIT_DEPENDENCY_DEFAULT, "default" }, | |
1188 | { UNIT_DEPENDENCY_UDEV, "udev" }, | |
1189 | { UNIT_DEPENDENCY_PATH, "path" }, | |
1190 | { UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT, "mountinfo-implicit" }, | |
1191 | { UNIT_DEPENDENCY_MOUNTINFO_DEFAULT, "mountinfo-default" }, | |
1192 | { UNIT_DEPENDENCY_PROC_SWAP, "proc-swap" }, | |
1193 | }; | |
1194 | size_t i; | |
1195 | ||
1196 | assert(f); | |
1197 | assert(kind); | |
1198 | assert(space); | |
1199 | ||
1200 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
1201 | ||
1202 | if (mask == 0) | |
1203 | break; | |
1204 | ||
d94a24ca | 1205 | if (FLAGS_SET(mask, table[i].mask)) { |
eef85c4a LP |
1206 | if (*space) |
1207 | fputc(' ', f); | |
1208 | else | |
1209 | *space = true; | |
1210 | ||
1211 | fputs(kind, f); | |
1212 | fputs("-", f); | |
1213 | fputs(table[i].name, f); | |
1214 | ||
1215 | mask &= ~table[i].mask; | |
1216 | } | |
1217 | } | |
1218 | ||
1219 | assert(mask == 0); | |
1220 | } | |
1221 | ||
87f0e418 | 1222 | void unit_dump(Unit *u, FILE *f, const char *prefix) { |
49dbfa7b | 1223 | char *t, **j; |
87f0e418 | 1224 | Iterator i; |
47be870b | 1225 | const char *prefix2; |
8d5e5931 | 1226 | char timestamp[5][FORMAT_TIMESTAMP_MAX], timespan[FORMAT_TIMESPAN_MAX]; |
a7f241db | 1227 | Unit *following; |
eeaedb7c | 1228 | _cleanup_set_free_ Set *following_set = NULL; |
05a98afd | 1229 | const char *n; |
02638280 LP |
1230 | CGroupMask m; |
1231 | int r; | |
87f0e418 LP |
1232 | |
1233 | assert(u); | |
ac155bb8 | 1234 | assert(u->type >= 0); |
87f0e418 | 1235 | |
4c940960 | 1236 | prefix = strempty(prefix); |
63c372cb | 1237 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
1238 | |
1239 | fprintf(f, | |
0121d1f2 ZJS |
1240 | "%s-> Unit %s:\n", |
1241 | prefix, u->id); | |
1242 | ||
4562c355 ZJS |
1243 | SET_FOREACH(t, u->aliases, i) |
1244 | fprintf(f, "%s\tAlias: %s\n", prefix, t); | |
0121d1f2 ZJS |
1245 | |
1246 | fprintf(f, | |
87f0e418 | 1247 | "%s\tDescription: %s\n" |
9e2f7c11 | 1248 | "%s\tInstance: %s\n" |
87f0e418 | 1249 | "%s\tUnit Load State: %s\n" |
2fad8195 | 1250 | "%s\tUnit Active State: %s\n" |
b895d155 | 1251 | "%s\tState Change Timestamp: %s\n" |
173e3821 | 1252 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 1253 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 1254 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 1255 | "%s\tInactive Enter Timestamp: %s\n" |
f2f725e5 | 1256 | "%s\tMay GC: %s\n" |
9444b1f2 | 1257 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 1258 | "%s\tTransient: %s\n" |
f5869324 | 1259 | "%s\tPerpetual: %s\n" |
5afe510c | 1260 | "%s\tGarbage Collection Mode: %s\n" |
4ad49000 LP |
1261 | "%s\tSlice: %s\n" |
1262 | "%s\tCGroup: %s\n" | |
aae7e17f | 1263 | "%s\tCGroup realized: %s\n", |
87f0e418 | 1264 | prefix, unit_description(u), |
ac155bb8 MS |
1265 | prefix, strna(u->instance), |
1266 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 1267 | prefix, unit_active_state_to_string(unit_active_state(u)), |
8d5e5931 ZJS |
1268 | prefix, strna(format_timestamp(timestamp[0], sizeof(timestamp[0]), u->state_change_timestamp.realtime)), |
1269 | prefix, strna(format_timestamp(timestamp[1], sizeof(timestamp[1]), u->inactive_exit_timestamp.realtime)), | |
1270 | prefix, strna(format_timestamp(timestamp[2], sizeof(timestamp[2]), u->active_enter_timestamp.realtime)), | |
1271 | prefix, strna(format_timestamp(timestamp[3], sizeof(timestamp[3]), u->active_exit_timestamp.realtime)), | |
1272 | prefix, strna(format_timestamp(timestamp[4], sizeof(timestamp[4]), u->inactive_enter_timestamp.realtime)), | |
f2f725e5 | 1273 | prefix, yes_no(unit_may_gc(u)), |
9444b1f2 | 1274 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 1275 | prefix, yes_no(u->transient), |
f5869324 | 1276 | prefix, yes_no(u->perpetual), |
5afe510c | 1277 | prefix, collect_mode_to_string(u->collect_mode), |
4ad49000 LP |
1278 | prefix, strna(unit_slice_name(u)), |
1279 | prefix, strna(u->cgroup_path), | |
aae7e17f FB |
1280 | prefix, yes_no(u->cgroup_realized)); |
1281 | ||
1282 | if (u->cgroup_realized_mask != 0) { | |
1283 | _cleanup_free_ char *s = NULL; | |
1284 | (void) cg_mask_to_string(u->cgroup_realized_mask, &s); | |
02638280 LP |
1285 | fprintf(f, "%s\tCGroup realized mask: %s\n", prefix, strnull(s)); |
1286 | } | |
0adf88b6 | 1287 | |
02638280 LP |
1288 | if (u->cgroup_enabled_mask != 0) { |
1289 | _cleanup_free_ char *s = NULL; | |
1290 | (void) cg_mask_to_string(u->cgroup_enabled_mask, &s); | |
1291 | fprintf(f, "%s\tCGroup enabled mask: %s\n", prefix, strnull(s)); | |
1292 | } | |
0adf88b6 | 1293 | |
02638280 LP |
1294 | m = unit_get_own_mask(u); |
1295 | if (m != 0) { | |
1296 | _cleanup_free_ char *s = NULL; | |
1297 | (void) cg_mask_to_string(m, &s); | |
1298 | fprintf(f, "%s\tCGroup own mask: %s\n", prefix, strnull(s)); | |
aae7e17f | 1299 | } |
0adf88b6 | 1300 | |
02638280 LP |
1301 | m = unit_get_members_mask(u); |
1302 | if (m != 0) { | |
aae7e17f | 1303 | _cleanup_free_ char *s = NULL; |
02638280 | 1304 | (void) cg_mask_to_string(m, &s); |
aae7e17f FB |
1305 | fprintf(f, "%s\tCGroup members mask: %s\n", prefix, strnull(s)); |
1306 | } | |
0301abf4 | 1307 | |
0adf88b6 LP |
1308 | m = unit_get_delegate_mask(u); |
1309 | if (m != 0) { | |
1310 | _cleanup_free_ char *s = NULL; | |
1311 | (void) cg_mask_to_string(m, &s); | |
1312 | fprintf(f, "%s\tCGroup delegate mask: %s\n", prefix, strnull(s)); | |
1313 | } | |
1314 | ||
4b58153d LP |
1315 | if (!sd_id128_is_null(u->invocation_id)) |
1316 | fprintf(f, "%s\tInvocation ID: " SD_ID128_FORMAT_STR "\n", | |
1317 | prefix, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
1318 | ||
49dbfa7b LP |
1319 | STRV_FOREACH(j, u->documentation) |
1320 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
1321 | ||
eeaedb7c LP |
1322 | following = unit_following(u); |
1323 | if (following) | |
ac155bb8 | 1324 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 1325 | |
eeaedb7c LP |
1326 | r = unit_following_set(u, &following_set); |
1327 | if (r >= 0) { | |
1328 | Unit *other; | |
1329 | ||
1330 | SET_FOREACH(other, following_set, i) | |
1331 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
1332 | } | |
1333 | ||
ac155bb8 MS |
1334 | if (u->fragment_path) |
1335 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 1336 | |
1b64d026 LP |
1337 | if (u->source_path) |
1338 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
1339 | ||
ae7a7182 | 1340 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 1341 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 1342 | |
e7dfbb4e LP |
1343 | if (u->failure_action != EMERGENCY_ACTION_NONE) |
1344 | fprintf(f, "%s\tFailure Action: %s\n", prefix, emergency_action_to_string(u->failure_action)); | |
7af67e9a LP |
1345 | if (u->failure_action_exit_status >= 0) |
1346 | fprintf(f, "%s\tFailure Action Exit Status: %i\n", prefix, u->failure_action_exit_status); | |
e7dfbb4e LP |
1347 | if (u->success_action != EMERGENCY_ACTION_NONE) |
1348 | fprintf(f, "%s\tSuccess Action: %s\n", prefix, emergency_action_to_string(u->success_action)); | |
7af67e9a LP |
1349 | if (u->success_action_exit_status >= 0) |
1350 | fprintf(f, "%s\tSuccess Action Exit Status: %i\n", prefix, u->success_action_exit_status); | |
e7dfbb4e | 1351 | |
36c16a7c | 1352 | if (u->job_timeout != USEC_INFINITY) |
2fa4092c | 1353 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 1354 | |
87a47f99 LN |
1355 | if (u->job_timeout_action != EMERGENCY_ACTION_NONE) |
1356 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, emergency_action_to_string(u->job_timeout_action)); | |
f189ab18 LP |
1357 | |
1358 | if (u->job_timeout_reboot_arg) | |
1359 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
1360 | ||
59fccdc5 LP |
1361 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
1362 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 1363 | |
ac155bb8 | 1364 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
1365 | fprintf(f, |
1366 | "%s\tCondition Timestamp: %s\n" | |
1367 | "%s\tCondition Result: %s\n", | |
8d5e5931 | 1368 | prefix, strna(format_timestamp(timestamp[0], sizeof(timestamp[0]), u->condition_timestamp.realtime)), |
ac155bb8 | 1369 | prefix, yes_no(u->condition_result)); |
2791a8f8 | 1370 | |
59fccdc5 LP |
1371 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
1372 | fprintf(f, | |
1373 | "%s\tAssert Timestamp: %s\n" | |
1374 | "%s\tAssert Result: %s\n", | |
8d5e5931 | 1375 | prefix, strna(format_timestamp(timestamp[0], sizeof(timestamp[0]), u->assert_timestamp.realtime)), |
59fccdc5 LP |
1376 | prefix, yes_no(u->assert_result)); |
1377 | ||
f6173cb9 | 1378 | for (UnitDependency d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
eef85c4a | 1379 | UnitDependencyInfo di; |
87f0e418 LP |
1380 | Unit *other; |
1381 | ||
eef85c4a LP |
1382 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { |
1383 | bool space = false; | |
1384 | ||
1385 | fprintf(f, "%s\t%s: %s (", prefix, unit_dependency_to_string(d), other->id); | |
1386 | ||
1387 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); | |
1388 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1389 | ||
1390 | fputs(")\n", f); | |
1391 | } | |
87f0e418 LP |
1392 | } |
1393 | ||
eef85c4a LP |
1394 | if (!hashmap_isempty(u->requires_mounts_for)) { |
1395 | UnitDependencyInfo di; | |
1396 | const char *path; | |
1397 | ||
1398 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { | |
1399 | bool space = false; | |
7c8fa05c | 1400 | |
eef85c4a | 1401 | fprintf(f, "%s\tRequiresMountsFor: %s (", prefix, path); |
7c8fa05c | 1402 | |
eef85c4a LP |
1403 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); |
1404 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1405 | ||
1406 | fputs(")\n", f); | |
1407 | } | |
7c8fa05c LP |
1408 | } |
1409 | ||
ac155bb8 | 1410 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 1411 | |
b0650475 | 1412 | fprintf(f, |
a40eb732 | 1413 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
1414 | "%s\tRefuseManualStart: %s\n" |
1415 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 1416 | "%s\tDefaultDependencies: %s\n" |
d420282b | 1417 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1418 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1419 | prefix, yes_no(u->stop_when_unneeded), |
1420 | prefix, yes_no(u->refuse_manual_start), | |
1421 | prefix, yes_no(u->refuse_manual_stop), | |
1422 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1423 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1424 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 1425 | |
23a177ef LP |
1426 | if (UNIT_VTABLE(u)->dump) |
1427 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1428 | |
ac155bb8 | 1429 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1430 | fprintf(f, |
1431 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1432 | prefix, u->merged_into->id); |
1433 | else if (u->load_state == UNIT_ERROR) | |
4bbccb02 | 1434 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror_safe(u->load_error)); |
8821a00f | 1435 | |
05a98afd LP |
1436 | for (n = sd_bus_track_first(u->bus_track); n; n = sd_bus_track_next(u->bus_track)) |
1437 | fprintf(f, "%s\tBus Ref: %s\n", prefix, n); | |
87f0e418 | 1438 | |
ac155bb8 MS |
1439 | if (u->job) |
1440 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1441 | |
e0209d83 MS |
1442 | if (u->nop_job) |
1443 | job_dump(u->nop_job, f, prefix2); | |
87f0e418 LP |
1444 | } |
1445 | ||
1446 | /* Common implementation for multiple backends */ | |
c3620770 | 1447 | int unit_load_fragment_and_dropin(Unit *u, bool fragment_required) { |
23a177ef LP |
1448 | int r; |
1449 | ||
1450 | assert(u); | |
23a177ef | 1451 | |
e48614c4 | 1452 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1453 | r = unit_load_fragment(u); |
1454 | if (r < 0) | |
23a177ef LP |
1455 | return r; |
1456 | ||
c3620770 ZJS |
1457 | if (u->load_state == UNIT_STUB) { |
1458 | if (fragment_required) | |
1459 | return -ENOENT; | |
1460 | ||
1461 | u->load_state = UNIT_LOADED; | |
1462 | } | |
23a177ef | 1463 | |
9e4ea9cc ZJS |
1464 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1465 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1466 | * been loaded and which not, at least without doing complicated book-keeping, | |
1467 | * so let's always reread all drop-ins. */ | |
c9e06956 ZJS |
1468 | r = unit_load_dropin(unit_follow_merge(u)); |
1469 | if (r < 0) | |
1470 | return r; | |
1471 | ||
1472 | if (u->source_path) { | |
1473 | struct stat st; | |
1474 | ||
1475 | if (stat(u->source_path, &st) >= 0) | |
1476 | u->source_mtime = timespec_load(&st.st_mtim); | |
1477 | else | |
1478 | u->source_mtime = 0; | |
1479 | } | |
1480 | ||
1481 | return 0; | |
23a177ef LP |
1482 | } |
1483 | ||
19496554 MS |
1484 | void unit_add_to_target_deps_queue(Unit *u) { |
1485 | Manager *m = u->manager; | |
1486 | ||
1487 | assert(u); | |
1488 | ||
1489 | if (u->in_target_deps_queue) | |
1490 | return; | |
1491 | ||
1492 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1493 | u->in_target_deps_queue = true; | |
1494 | } | |
1495 | ||
bba34eed | 1496 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1497 | assert(u); |
1498 | assert(target); | |
1499 | ||
ac155bb8 | 1500 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1501 | return 0; |
1502 | ||
35b8ca3a | 1503 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1504 | * that loop check below is reliable */ |
ac155bb8 MS |
1505 | if (u->load_state != UNIT_LOADED || |
1506 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1507 | return 0; |
1508 | ||
21256a2b LP |
1509 | /* If either side wants no automatic dependencies, then let's |
1510 | * skip this */ | |
ac155bb8 MS |
1511 | if (!u->default_dependencies || |
1512 | !target->default_dependencies) | |
21256a2b LP |
1513 | return 0; |
1514 | ||
98bc2000 | 1515 | /* Don't create loops */ |
eef85c4a | 1516 | if (hashmap_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1517 | return 0; |
1518 | ||
eef85c4a | 1519 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1520 | } |
1521 | ||
e954c9cf LP |
1522 | static int unit_add_slice_dependencies(Unit *u) { |
1523 | assert(u); | |
b81884e7 | 1524 | |
35b7ff80 | 1525 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1526 | return 0; |
1527 | ||
eef85c4a LP |
1528 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1529 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1530 | relationship). */ | |
f6173cb9 | 1531 | UnitDependencyMask mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; |
eef85c4a | 1532 | |
e954c9cf | 1533 | if (UNIT_ISSET(u->slice)) |
eef85c4a | 1534 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true, mask); |
e954c9cf | 1535 | |
8c8da0e0 | 1536 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1537 | return 0; |
1538 | ||
5a724170 | 1539 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, true, mask); |
98bc2000 LP |
1540 | } |
1541 | ||
e954c9cf | 1542 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1543 | UnitDependencyInfo di; |
1544 | const char *path; | |
1545 | Iterator i; | |
9588bc32 LP |
1546 | int r; |
1547 | ||
1548 | assert(u); | |
1549 | ||
eef85c4a LP |
1550 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { |
1551 | char prefix[strlen(path) + 1]; | |
9588bc32 | 1552 | |
eef85c4a | 1553 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1554 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1555 | Unit *m; |
1556 | ||
c7c89abb | 1557 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1558 | if (r < 0) |
1559 | return r; | |
c7c89abb FB |
1560 | |
1561 | m = manager_get_unit(u->manager, p); | |
1562 | if (!m) { | |
1563 | /* Make sure to load the mount unit if | |
1564 | * it exists. If so the dependencies | |
1565 | * on this unit will be added later | |
1566 | * during the loading of the mount | |
1567 | * unit. */ | |
1568 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1569 | continue; |
c7c89abb | 1570 | } |
9588bc32 LP |
1571 | if (m == u) |
1572 | continue; | |
1573 | ||
1574 | if (m->load_state != UNIT_LOADED) | |
1575 | continue; | |
1576 | ||
eef85c4a | 1577 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1578 | if (r < 0) |
1579 | return r; | |
1580 | ||
1581 | if (m->fragment_path) { | |
eef85c4a | 1582 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1583 | if (r < 0) |
1584 | return r; | |
1585 | } | |
1586 | } | |
1587 | } | |
1588 | ||
1589 | return 0; | |
1590 | } | |
1591 | ||
95ae05c0 WC |
1592 | static int unit_add_startup_units(Unit *u) { |
1593 | CGroupContext *c; | |
95ae05c0 WC |
1594 | |
1595 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1596 | if (!c) |
1597 | return 0; | |
1598 | ||
d53d9474 | 1599 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1600 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1601 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1602 | return 0; |
1603 | ||
de7fef4b | 1604 | return set_ensure_put(&u->manager->startup_units, NULL, u); |
95ae05c0 WC |
1605 | } |
1606 | ||
87f0e418 LP |
1607 | int unit_load(Unit *u) { |
1608 | int r; | |
1609 | ||
1610 | assert(u); | |
1611 | ||
ac155bb8 | 1612 | if (u->in_load_queue) { |
71fda00f | 1613 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1614 | u->in_load_queue = false; |
87f0e418 LP |
1615 | } |
1616 | ||
ac155bb8 | 1617 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1618 | return -EINVAL; |
1619 | ||
ac155bb8 | 1620 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1621 | return 0; |
1622 | ||
4f4afc88 | 1623 | if (u->transient_file) { |
66fa4bdd LP |
1624 | /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup |
1625 | * is complete, hence let's synchronize the unit file we just wrote to disk. */ | |
1626 | ||
4f4afc88 LP |
1627 | r = fflush_and_check(u->transient_file); |
1628 | if (r < 0) | |
1629 | goto fail; | |
1630 | ||
50fb00b7 | 1631 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1632 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1633 | } |
1634 | ||
c3784a7d ZJS |
1635 | r = UNIT_VTABLE(u)->load(u); |
1636 | if (r < 0) | |
23a177ef | 1637 | goto fail; |
c3784a7d ZJS |
1638 | |
1639 | assert(u->load_state != UNIT_STUB); | |
23a177ef | 1640 | |
7c8fa05c | 1641 | if (u->load_state == UNIT_LOADED) { |
19496554 | 1642 | unit_add_to_target_deps_queue(u); |
e954c9cf LP |
1643 | |
1644 | r = unit_add_slice_dependencies(u); | |
1645 | if (r < 0) | |
1646 | goto fail; | |
c2756a68 | 1647 | |
e954c9cf | 1648 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1649 | if (r < 0) |
c2756a68 | 1650 | goto fail; |
7c8fa05c | 1651 | |
95ae05c0 WC |
1652 | r = unit_add_startup_units(u); |
1653 | if (r < 0) | |
1654 | goto fail; | |
1655 | ||
eef85c4a | 1656 | if (u->on_failure_job_mode == JOB_ISOLATE && hashmap_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1657 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
6f40aa45 | 1658 | r = -ENOEXEC; |
c2756a68 LP |
1659 | goto fail; |
1660 | } | |
bc432dc7 | 1661 | |
a2df3ea4 MK |
1662 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1663 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1664 | ||
5af88058 LP |
1665 | /* We finished loading, let's ensure our parents recalculate the members mask */ |
1666 | unit_invalidate_cgroup_members_masks(u); | |
f68319bb LP |
1667 | } |
1668 | ||
ac155bb8 | 1669 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1670 | |
1671 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1672 | unit_add_to_gc_queue(u); |
87f0e418 | 1673 | |
87f0e418 LP |
1674 | return 0; |
1675 | ||
1676 | fail: | |
c4555ad8 LP |
1677 | /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code should hence |
1678 | * return ENOEXEC to ensure units are placed in this state after loading */ | |
1679 | ||
1680 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : | |
1681 | r == -ENOEXEC ? UNIT_BAD_SETTING : | |
1682 | UNIT_ERROR; | |
ac155bb8 | 1683 | u->load_error = r; |
c4555ad8 | 1684 | |
c1e1601e | 1685 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1686 | unit_add_to_gc_queue(u); |
23a177ef | 1687 | |
c4555ad8 | 1688 | return log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
87f0e418 LP |
1689 | } |
1690 | ||
f9f88198 YW |
1691 | _printf_(7, 8) |
1692 | static int log_unit_internal(void *userdata, int level, int error, const char *file, int line, const char *func, const char *format, ...) { | |
1693 | Unit *u = userdata; | |
1694 | va_list ap; | |
1695 | int r; | |
49365733 | 1696 | |
f9f88198 YW |
1697 | va_start(ap, format); |
1698 | if (u) | |
1699 | r = log_object_internalv(level, error, file, line, func, | |
1700 | u->manager->unit_log_field, | |
1701 | u->id, | |
1702 | u->manager->invocation_log_field, | |
1703 | u->invocation_id_string, | |
1704 | format, ap); | |
1705 | else | |
1706 | r = log_internalv(level, error, file, line, func, format, ap); | |
1707 | va_end(ap); | |
49365733 | 1708 | |
f9f88198 | 1709 | return r; |
49365733 LP |
1710 | } |
1711 | ||
97a3f4ee | 1712 | static bool unit_test_condition(Unit *u) { |
a0b191b7 LP |
1713 | _cleanup_strv_free_ char **env = NULL; |
1714 | int r; | |
1715 | ||
90bbc946 LP |
1716 | assert(u); |
1717 | ||
ac155bb8 | 1718 | dual_timestamp_get(&u->condition_timestamp); |
90bbc946 | 1719 | |
a0b191b7 LP |
1720 | r = manager_get_effective_environment(u->manager, &env); |
1721 | if (r < 0) { | |
1722 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
1723 | u->condition_result = CONDITION_ERROR; | |
1724 | } else | |
1725 | u->condition_result = condition_test_list( | |
1726 | u->conditions, | |
1727 | env, | |
1728 | condition_type_to_string, | |
1729 | log_unit_internal, | |
1730 | u); | |
e18f8852 | 1731 | |
a0b191b7 | 1732 | unit_add_to_dbus_queue(u); |
ac155bb8 | 1733 | return u->condition_result; |
90bbc946 LP |
1734 | } |
1735 | ||
97a3f4ee | 1736 | static bool unit_test_assert(Unit *u) { |
a0b191b7 LP |
1737 | _cleanup_strv_free_ char **env = NULL; |
1738 | int r; | |
1739 | ||
59fccdc5 LP |
1740 | assert(u); |
1741 | ||
1742 | dual_timestamp_get(&u->assert_timestamp); | |
59fccdc5 | 1743 | |
a0b191b7 LP |
1744 | r = manager_get_effective_environment(u->manager, &env); |
1745 | if (r < 0) { | |
1746 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
1747 | u->assert_result = CONDITION_ERROR; | |
1748 | } else | |
1749 | u->assert_result = condition_test_list( | |
1750 | u->asserts, | |
1751 | env, | |
1752 | assert_type_to_string, | |
1753 | log_unit_internal, | |
1754 | u); | |
e18f8852 | 1755 | |
a0b191b7 | 1756 | unit_add_to_dbus_queue(u); |
59fccdc5 LP |
1757 | return u->assert_result; |
1758 | } | |
1759 | ||
5bcf34eb | 1760 | void unit_status_printf(Unit *u, StatusType status_type, const char *status, const char *unit_status_msg_format) { |
5b262f74 LP |
1761 | const char *d; |
1762 | ||
2a8f53c6 | 1763 | d = unit_status_string(u); |
5b262f74 LP |
1764 | if (log_get_show_color()) |
1765 | d = strjoina(ANSI_HIGHLIGHT, d, ANSI_NORMAL); | |
1766 | ||
df446f96 | 1767 | DISABLE_WARNING_FORMAT_NONLITERAL; |
5bcf34eb | 1768 | manager_status_printf(u->manager, status_type, status, unit_status_msg_format, d); |
df446f96 LP |
1769 | REENABLE_WARNING; |
1770 | } | |
1771 | ||
97a3f4ee | 1772 | int unit_test_start_limit(Unit *u) { |
429926e9 TR |
1773 | const char *reason; |
1774 | ||
6bf0f408 LP |
1775 | assert(u); |
1776 | ||
7bf081a1 | 1777 | if (ratelimit_below(&u->start_ratelimit)) { |
6bf0f408 LP |
1778 | u->start_limit_hit = false; |
1779 | return 0; | |
1780 | } | |
1781 | ||
1782 | log_unit_warning(u, "Start request repeated too quickly."); | |
1783 | u->start_limit_hit = true; | |
1784 | ||
429926e9 TR |
1785 | reason = strjoina("unit ", u->id, " failed"); |
1786 | ||
36c4dc08 LP |
1787 | emergency_action(u->manager, u->start_limit_action, |
1788 | EMERGENCY_ACTION_IS_WATCHDOG|EMERGENCY_ACTION_WARN, | |
1789 | u->reboot_arg, -1, reason); | |
1790 | ||
1791 | return -ECANCELED; | |
6bf0f408 LP |
1792 | } |
1793 | ||
c891efaf | 1794 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1795 | assert(u); |
c891efaf FB |
1796 | |
1797 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1798 | return false; | |
1799 | ||
1800 | /* For some reasons units remaining in the same process group | |
1801 | * as PID 1 fail to acquire the console even if it's not used | |
1802 | * by any process. So skip the confirmation question for them. */ | |
1803 | return !unit_get_exec_context(u)->same_pgrp; | |
1804 | } | |
1805 | ||
631b676b LP |
1806 | static bool unit_verify_deps(Unit *u) { |
1807 | Unit *other; | |
1808 | Iterator j; | |
eef85c4a | 1809 | void *v; |
631b676b LP |
1810 | |
1811 | assert(u); | |
1812 | ||
1813 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with | |
1814 | * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job | |
1815 | * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in | |
1816 | * conjunction with After= as for them any such check would make things entirely racy. */ | |
1817 | ||
eef85c4a | 1818 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], j) { |
631b676b | 1819 | |
eef85c4a | 1820 | if (!hashmap_contains(u->dependencies[UNIT_AFTER], other)) |
631b676b LP |
1821 | continue; |
1822 | ||
1823 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1824 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1825 | return false; | |
1826 | } | |
1827 | } | |
1828 | ||
1829 | return true; | |
1830 | } | |
1831 | ||
9adb6959 | 1832 | /* Errors that aren't really errors: |
6bf0f408 | 1833 | * -EALREADY: Unit is already started. |
9adb6959 | 1834 | * -ECOMM: Condition failed |
6bf0f408 | 1835 | * -EAGAIN: An operation is already in progress. Retry later. |
9adb6959 LP |
1836 | * |
1837 | * Errors that are real errors: | |
1838 | * -EBADR: This unit type does not support starting. | |
2de9b979 | 1839 | * -ECANCELED: Start limit hit, too many requests for now |
6bf0f408 LP |
1840 | * -EPROTO: Assert failed |
1841 | * -EINVAL: Unit not loaded | |
1842 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1843 | * -ENOLINK: The necessary dependencies are not fulfilled. |
d4fd1cf2 | 1844 | * -ESTALE: This unit has been started before and can't be started a second time |
a4191c9f | 1845 | * -ENOENT: This is a triggering unit and unit to trigger is not loaded |
87f0e418 LP |
1846 | */ |
1847 | int unit_start(Unit *u) { | |
1848 | UnitActiveState state; | |
92ab323c | 1849 | Unit *following; |
87f0e418 LP |
1850 | |
1851 | assert(u); | |
1852 | ||
5766aca8 LP |
1853 | /* If this is already started, then this will succeed. Note that this will even succeed if this unit |
1854 | * is not startable by the user. This is relied on to detect when we need to wait for units and when | |
1855 | * waiting is finished. */ | |
87f0e418 LP |
1856 | state = unit_active_state(u); |
1857 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1858 | return -EALREADY; | |
380dc8b0 LP |
1859 | if (state == UNIT_MAINTENANCE) |
1860 | return -EAGAIN; | |
87f0e418 | 1861 | |
6bf0f408 LP |
1862 | /* Units that aren't loaded cannot be started */ |
1863 | if (u->load_state != UNIT_LOADED) | |
1864 | return -EINVAL; | |
1865 | ||
d4fd1cf2 LP |
1866 | /* Refuse starting scope units more than once */ |
1867 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1868 | return -ESTALE; | |
1869 | ||
5766aca8 LP |
1870 | /* If the conditions failed, don't do anything at all. If we already are activating this call might |
1871 | * still be useful to speed up activation in case there is some hold-off time, but we don't want to | |
1872 | * recheck the condition in that case. */ | |
a82e5507 | 1873 | if (state != UNIT_ACTIVATING && |
5af6aa58 | 1874 | !unit_test_condition(u)) |
5766aca8 | 1875 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(ECOMM), "Starting requested but condition failed. Not starting unit."); |
52661efd | 1876 | |
59fccdc5 LP |
1877 | /* If the asserts failed, fail the entire job */ |
1878 | if (state != UNIT_ACTIVATING && | |
5766aca8 LP |
1879 | !unit_test_assert(u)) |
1880 | return log_unit_notice_errno(u, SYNTHETIC_ERRNO(EPROTO), "Starting requested but asserts failed."); | |
59fccdc5 | 1881 | |
5766aca8 LP |
1882 | /* Units of types that aren't supported cannot be started. Note that we do this test only after the |
1883 | * condition checks, so that we rather return condition check errors (which are usually not | |
1884 | * considered a true failure) than "not supported" errors (which are considered a failure). | |
d11a7645 | 1885 | */ |
96cf3ec9 | 1886 | if (!unit_type_supported(u->type)) |
d11a7645 LP |
1887 | return -EOPNOTSUPP; |
1888 | ||
5766aca8 LP |
1889 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine |
1890 | * should have taken care of this already, but let's check this here again. After all, our | |
1891 | * dependencies might not be in effect anymore, due to a reload or due to a failed condition. */ | |
631b676b LP |
1892 | if (!unit_verify_deps(u)) |
1893 | return -ENOLINK; | |
1894 | ||
92ab323c | 1895 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1896 | following = unit_following(u); |
1897 | if (following) { | |
f2341e0a | 1898 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1899 | return unit_start(following); |
1900 | } | |
1901 | ||
1902 | /* If it is stopped, but we cannot start it, then fail */ | |
1903 | if (!UNIT_VTABLE(u)->start) | |
1904 | return -EBADR; | |
1905 | ||
5766aca8 LP |
1906 | /* We don't suppress calls to ->start() here when we are already starting, to allow this request to |
1907 | * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it | |
1908 | * waits for a holdoff timer to elapse before it will start again. */ | |
87f0e418 | 1909 | |
c1e1601e | 1910 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 1911 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 1912 | |
d1a34ae9 | 1913 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1914 | } |
1915 | ||
1916 | bool unit_can_start(Unit *u) { | |
1917 | assert(u); | |
1918 | ||
8ff4d2ab LP |
1919 | if (u->load_state != UNIT_LOADED) |
1920 | return false; | |
1921 | ||
96cf3ec9 | 1922 | if (!unit_type_supported(u->type)) |
8ff4d2ab LP |
1923 | return false; |
1924 | ||
d4fd1cf2 LP |
1925 | /* Scope units may be started only once */ |
1926 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
1927 | return false; | |
1928 | ||
87f0e418 LP |
1929 | return !!UNIT_VTABLE(u)->start; |
1930 | } | |
1931 | ||
2528a7a6 LP |
1932 | bool unit_can_isolate(Unit *u) { |
1933 | assert(u); | |
1934 | ||
1935 | return unit_can_start(u) && | |
ac155bb8 | 1936 | u->allow_isolate; |
2528a7a6 LP |
1937 | } |
1938 | ||
87f0e418 LP |
1939 | /* Errors: |
1940 | * -EBADR: This unit type does not support stopping. | |
1941 | * -EALREADY: Unit is already stopped. | |
1942 | * -EAGAIN: An operation is already in progress. Retry later. | |
1943 | */ | |
1944 | int unit_stop(Unit *u) { | |
1945 | UnitActiveState state; | |
92ab323c | 1946 | Unit *following; |
87f0e418 LP |
1947 | |
1948 | assert(u); | |
1949 | ||
87f0e418 | 1950 | state = unit_active_state(u); |
fdf20a31 | 1951 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1952 | return -EALREADY; |
1953 | ||
0faacd47 LP |
1954 | following = unit_following(u); |
1955 | if (following) { | |
f2341e0a | 1956 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1957 | return unit_stop(following); |
1958 | } | |
1959 | ||
7898b0cf LP |
1960 | if (!UNIT_VTABLE(u)->stop) |
1961 | return -EBADR; | |
1962 | ||
c1e1601e | 1963 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 1964 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 1965 | |
d1a34ae9 | 1966 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1967 | } |
1968 | ||
f5869324 LP |
1969 | bool unit_can_stop(Unit *u) { |
1970 | assert(u); | |
1971 | ||
96cf3ec9 | 1972 | if (!unit_type_supported(u->type)) |
f5869324 LP |
1973 | return false; |
1974 | ||
1975 | if (u->perpetual) | |
1976 | return false; | |
1977 | ||
1978 | return !!UNIT_VTABLE(u)->stop; | |
1979 | } | |
1980 | ||
87f0e418 LP |
1981 | /* Errors: |
1982 | * -EBADR: This unit type does not support reloading. | |
1983 | * -ENOEXEC: Unit is not started. | |
1984 | * -EAGAIN: An operation is already in progress. Retry later. | |
1985 | */ | |
1986 | int unit_reload(Unit *u) { | |
1987 | UnitActiveState state; | |
92ab323c | 1988 | Unit *following; |
87f0e418 LP |
1989 | |
1990 | assert(u); | |
1991 | ||
ac155bb8 | 1992 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1993 | return -EINVAL; |
1994 | ||
87f0e418 LP |
1995 | if (!unit_can_reload(u)) |
1996 | return -EBADR; | |
1997 | ||
1998 | state = unit_active_state(u); | |
e364ad06 | 1999 | if (state == UNIT_RELOADING) |
6255af75 | 2000 | return -EAGAIN; |
87f0e418 | 2001 | |
6a371e23 | 2002 | if (state != UNIT_ACTIVE) { |
f2341e0a | 2003 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 2004 | return -ENOEXEC; |
6a371e23 | 2005 | } |
87f0e418 | 2006 | |
e48614c4 ZJS |
2007 | following = unit_following(u); |
2008 | if (following) { | |
f2341e0a | 2009 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
2010 | return unit_reload(following); |
2011 | } | |
2012 | ||
c1e1601e | 2013 | unit_add_to_dbus_queue(u); |
82a2b6bb | 2014 | |
f54bcca5 JR |
2015 | if (!UNIT_VTABLE(u)->reload) { |
2016 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
2ad2e41a | 2017 | unit_notify(u, unit_active_state(u), unit_active_state(u), 0); |
f54bcca5 JR |
2018 | return 0; |
2019 | } | |
2020 | ||
d9e45bc3 MS |
2021 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
2022 | ||
d1a34ae9 | 2023 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
2024 | } |
2025 | ||
2026 | bool unit_can_reload(Unit *u) { | |
2027 | assert(u); | |
2028 | ||
f54bcca5 JR |
2029 | if (UNIT_VTABLE(u)->can_reload) |
2030 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 2031 | |
eef85c4a | 2032 | if (!hashmap_isempty(u->dependencies[UNIT_PROPAGATES_RELOAD_TO])) |
87f0e418 LP |
2033 | return true; |
2034 | ||
f54bcca5 | 2035 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
2036 | } |
2037 | ||
a3c1168a LP |
2038 | bool unit_is_unneeded(Unit *u) { |
2039 | static const UnitDependency deps[] = { | |
be7d9ff7 | 2040 | UNIT_REQUIRED_BY, |
084918ba | 2041 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
2042 | UNIT_WANTED_BY, |
2043 | UNIT_BOUND_BY, | |
2044 | }; | |
a3c1168a | 2045 | size_t j; |
f3bff0eb LP |
2046 | |
2047 | assert(u); | |
2048 | ||
ac155bb8 | 2049 | if (!u->stop_when_unneeded) |
a3c1168a | 2050 | return false; |
f3bff0eb | 2051 | |
a3c1168a LP |
2052 | /* Don't clean up while the unit is transitioning or is even inactive. */ |
2053 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
2054 | return false; | |
2055 | if (u->job) | |
2056 | return false; | |
f3bff0eb | 2057 | |
a3c1168a | 2058 | for (j = 0; j < ELEMENTSOF(deps); j++) { |
eef85c4a LP |
2059 | Unit *other; |
2060 | Iterator i; | |
2061 | void *v; | |
2062 | ||
fda09318 | 2063 | /* If a dependent unit has a job queued, is active or transitioning, or is marked for |
a3c1168a | 2064 | * restart, then don't clean this one up. */ |
b81884e7 | 2065 | |
a3c1168a | 2066 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[deps[j]], i) { |
93d4cb09 | 2067 | if (other->job) |
a3c1168a LP |
2068 | return false; |
2069 | ||
2070 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
2071 | return false; | |
2072 | ||
2073 | if (unit_will_restart(other)) | |
2074 | return false; | |
2075 | } | |
bea355da LP |
2076 | } |
2077 | ||
a3c1168a LP |
2078 | return true; |
2079 | } | |
f3bff0eb | 2080 | |
a3c1168a LP |
2081 | static void check_unneeded_dependencies(Unit *u) { |
2082 | ||
2083 | static const UnitDependency deps[] = { | |
2084 | UNIT_REQUIRES, | |
2085 | UNIT_REQUISITE, | |
2086 | UNIT_WANTS, | |
2087 | UNIT_BINDS_TO, | |
2088 | }; | |
2089 | size_t j; | |
2090 | ||
2091 | assert(u); | |
2092 | ||
2093 | /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */ | |
2094 | ||
2095 | for (j = 0; j < ELEMENTSOF(deps); j++) { | |
2096 | Unit *other; | |
2097 | Iterator i; | |
2098 | void *v; | |
2099 | ||
2100 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[deps[j]], i) | |
fda09318 | 2101 | unit_submit_to_stop_when_unneeded_queue(other); |
a3c1168a | 2102 | } |
f3bff0eb LP |
2103 | } |
2104 | ||
ff502445 | 2105 | static void unit_check_binds_to(Unit *u) { |
4afd3348 | 2106 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
ff502445 LP |
2107 | bool stop = false; |
2108 | Unit *other; | |
2109 | Iterator i; | |
eef85c4a | 2110 | void *v; |
67bfdc97 | 2111 | int r; |
ff502445 LP |
2112 | |
2113 | assert(u); | |
2114 | ||
2115 | if (u->job) | |
2116 | return; | |
2117 | ||
2118 | if (unit_active_state(u) != UNIT_ACTIVE) | |
2119 | return; | |
2120 | ||
eef85c4a | 2121 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) { |
ff502445 LP |
2122 | if (other->job) |
2123 | continue; | |
13ddc3fc ZJS |
2124 | |
2125 | if (!other->coldplugged) | |
2126 | /* We might yet create a job for the other unit… */ | |
2127 | continue; | |
ff502445 LP |
2128 | |
2129 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
2130 | continue; | |
2131 | ||
2132 | stop = true; | |
98f738b6 | 2133 | break; |
ff502445 LP |
2134 | } |
2135 | ||
2136 | if (!stop) | |
2137 | return; | |
2138 | ||
595bfe7d | 2139 | /* If stopping a unit fails continuously we might enter a stop |
67bfdc97 LP |
2140 | * loop here, hence stop acting on the service being |
2141 | * unnecessary after a while. */ | |
7994ac1d | 2142 | if (!ratelimit_below(&u->auto_stop_ratelimit)) { |
67bfdc97 LP |
2143 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); |
2144 | return; | |
2145 | } | |
2146 | ||
98f738b6 | 2147 | assert(other); |
f2341e0a | 2148 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
2149 | |
2150 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
50cbaba4 | 2151 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, NULL, &error, NULL); |
67bfdc97 | 2152 | if (r < 0) |
4bd29fe5 | 2153 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
ff502445 LP |
2154 | } |
2155 | ||
87f0e418 LP |
2156 | static void retroactively_start_dependencies(Unit *u) { |
2157 | Iterator i; | |
2158 | Unit *other; | |
eef85c4a | 2159 | void *v; |
87f0e418 LP |
2160 | |
2161 | assert(u); | |
2162 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2163 | ||
eef85c4a LP |
2164 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUIRES], i) |
2165 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2166 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2167 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
b81884e7 | 2168 | |
eef85c4a LP |
2169 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) |
2170 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2171 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2172 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
87f0e418 | 2173 | |
eef85c4a LP |
2174 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_WANTS], i) |
2175 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2176 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2177 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL, NULL); |
87f0e418 | 2178 | |
eef85c4a | 2179 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 2180 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2181 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
69dd2852 | 2182 | |
eef85c4a | 2183 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 2184 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2185 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
87f0e418 LP |
2186 | } |
2187 | ||
2188 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 | 2189 | Unit *other; |
eef85c4a LP |
2190 | Iterator i; |
2191 | void *v; | |
87f0e418 LP |
2192 | |
2193 | assert(u); | |
2194 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2195 | ||
b81884e7 | 2196 | /* Pull down units which are bound to us recursively if enabled */ |
eef85c4a | 2197 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 2198 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2199 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
cd0504d0 MS |
2200 | } |
2201 | ||
3ecaa09b | 2202 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
2203 | Unit *other; |
2204 | Iterator i; | |
eef85c4a | 2205 | void *v; |
7f66b026 | 2206 | int r; |
c0daa706 LP |
2207 | |
2208 | assert(u); | |
2209 | ||
eef85c4a | 2210 | if (hashmap_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
2211 | return; |
2212 | ||
f2341e0a | 2213 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 2214 | |
eef85c4a | 2215 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_ON_FAILURE], i) { |
7f66b026 | 2216 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
222ae6a8 | 2217 | |
50cbaba4 | 2218 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, NULL, &error, NULL); |
c1b6628d | 2219 | if (r < 0) |
7f66b026 | 2220 | log_unit_warning_errno(u, r, "Failed to enqueue OnFailure= job, ignoring: %s", bus_error_message(&error, r)); |
222ae6a8 | 2221 | } |
c0daa706 LP |
2222 | } |
2223 | ||
3ecaa09b LP |
2224 | void unit_trigger_notify(Unit *u) { |
2225 | Unit *other; | |
2226 | Iterator i; | |
eef85c4a | 2227 | void *v; |
3ecaa09b LP |
2228 | |
2229 | assert(u); | |
2230 | ||
eef85c4a | 2231 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_TRIGGERED_BY], i) |
3ecaa09b LP |
2232 | if (UNIT_VTABLE(other)->trigger_notify) |
2233 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2234 | } | |
2235 | ||
37109b85 ZJS |
2236 | static int raise_level(int log_level, bool condition_info, bool condition_notice) { |
2237 | if (condition_notice && log_level > LOG_NOTICE) | |
2238 | return LOG_NOTICE; | |
2239 | if (condition_info && log_level > LOG_INFO) | |
2240 | return LOG_INFO; | |
2241 | return log_level; | |
2242 | } | |
2243 | ||
915b1d01 | 2244 | static int unit_log_resources(Unit *u) { |
bc40a20e LP |
2245 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + _CGROUP_IO_ACCOUNTING_METRIC_MAX + 4]; |
2246 | bool any_traffic = false, have_ip_accounting = false, any_io = false, have_io_accounting = false; | |
2247 | _cleanup_free_ char *igress = NULL, *egress = NULL, *rr = NULL, *wr = NULL; | |
162392b7 | 2248 | int log_level = LOG_DEBUG; /* May be raised if resources consumed over a threshold */ |
915b1d01 | 2249 | size_t n_message_parts = 0, n_iovec = 0; |
bc40a20e | 2250 | char* message_parts[1 + 2 + 2 + 1], *t; |
915b1d01 LP |
2251 | nsec_t nsec = NSEC_INFINITY; |
2252 | CGroupIPAccountingMetric m; | |
2253 | size_t i; | |
2254 | int r; | |
2255 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2256 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2257 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2258 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2259 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2260 | }; | |
bc40a20e LP |
2261 | const char* const io_fields[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
2262 | [CGROUP_IO_READ_BYTES] = "IO_METRIC_READ_BYTES", | |
2263 | [CGROUP_IO_WRITE_BYTES] = "IO_METRIC_WRITE_BYTES", | |
2264 | [CGROUP_IO_READ_OPERATIONS] = "IO_METRIC_READ_OPERATIONS", | |
2265 | [CGROUP_IO_WRITE_OPERATIONS] = "IO_METRIC_WRITE_OPERATIONS", | |
2266 | }; | |
915b1d01 LP |
2267 | |
2268 | assert(u); | |
2269 | ||
2270 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2271 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2272 | * information and the complete data in structured fields. */ | |
2273 | ||
2274 | (void) unit_get_cpu_usage(u, &nsec); | |
2275 | if (nsec != NSEC_INFINITY) { | |
2276 | char buf[FORMAT_TIMESPAN_MAX] = ""; | |
2277 | ||
2278 | /* Format the CPU time for inclusion in the structured log message */ | |
2279 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2280 | r = log_oom(); | |
2281 | goto finish; | |
2282 | } | |
2283 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2284 | ||
2285 | /* Format the CPU time for inclusion in the human language message string */ | |
2286 | format_timespan(buf, sizeof(buf), nsec / NSEC_PER_USEC, USEC_PER_MSEC); | |
ec9d636b | 2287 | t = strjoin("consumed ", buf, " CPU time"); |
915b1d01 LP |
2288 | if (!t) { |
2289 | r = log_oom(); | |
2290 | goto finish; | |
2291 | } | |
2292 | ||
2293 | message_parts[n_message_parts++] = t; | |
37109b85 ZJS |
2294 | |
2295 | log_level = raise_level(log_level, | |
2296 | nsec > NOTICEWORTHY_CPU_NSEC, | |
2297 | nsec > MENTIONWORTHY_CPU_NSEC); | |
915b1d01 LP |
2298 | } |
2299 | ||
bc40a20e LP |
2300 | for (CGroupIOAccountingMetric k = 0; k < _CGROUP_IO_ACCOUNTING_METRIC_MAX; k++) { |
2301 | char buf[FORMAT_BYTES_MAX] = ""; | |
2302 | uint64_t value = UINT64_MAX; | |
2303 | ||
2304 | assert(io_fields[k]); | |
2305 | ||
2306 | (void) unit_get_io_accounting(u, k, k > 0, &value); | |
2307 | if (value == UINT64_MAX) | |
2308 | continue; | |
2309 | ||
2310 | have_io_accounting = true; | |
2311 | if (value > 0) | |
2312 | any_io = true; | |
2313 | ||
2314 | /* Format IO accounting data for inclusion in the structured log message */ | |
2315 | if (asprintf(&t, "%s=%" PRIu64, io_fields[k], value) < 0) { | |
2316 | r = log_oom(); | |
2317 | goto finish; | |
2318 | } | |
2319 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2320 | ||
2321 | /* Format the IO accounting data for inclusion in the human language message string, but only | |
2322 | * for the bytes counters (and not for the operations counters) */ | |
2323 | if (k == CGROUP_IO_READ_BYTES) { | |
2324 | assert(!rr); | |
2325 | rr = strjoin("read ", format_bytes(buf, sizeof(buf), value), " from disk"); | |
2326 | if (!rr) { | |
2327 | r = log_oom(); | |
2328 | goto finish; | |
2329 | } | |
2330 | } else if (k == CGROUP_IO_WRITE_BYTES) { | |
2331 | assert(!wr); | |
2332 | wr = strjoin("written ", format_bytes(buf, sizeof(buf), value), " to disk"); | |
2333 | if (!wr) { | |
2334 | r = log_oom(); | |
2335 | goto finish; | |
2336 | } | |
2337 | } | |
37109b85 ZJS |
2338 | |
2339 | if (IN_SET(k, CGROUP_IO_READ_BYTES, CGROUP_IO_WRITE_BYTES)) | |
2340 | log_level = raise_level(log_level, | |
2341 | value > MENTIONWORTHY_IO_BYTES, | |
2342 | value > NOTICEWORTHY_IO_BYTES); | |
bc40a20e LP |
2343 | } |
2344 | ||
2345 | if (have_io_accounting) { | |
2346 | if (any_io) { | |
2347 | if (rr) | |
2348 | message_parts[n_message_parts++] = TAKE_PTR(rr); | |
2349 | if (wr) | |
2350 | message_parts[n_message_parts++] = TAKE_PTR(wr); | |
2351 | ||
2352 | } else { | |
2353 | char *k; | |
2354 | ||
2355 | k = strdup("no IO"); | |
2356 | if (!k) { | |
2357 | r = log_oom(); | |
2358 | goto finish; | |
2359 | } | |
2360 | ||
2361 | message_parts[n_message_parts++] = k; | |
2362 | } | |
2363 | } | |
2364 | ||
915b1d01 LP |
2365 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
2366 | char buf[FORMAT_BYTES_MAX] = ""; | |
2367 | uint64_t value = UINT64_MAX; | |
2368 | ||
2369 | assert(ip_fields[m]); | |
2370 | ||
2371 | (void) unit_get_ip_accounting(u, m, &value); | |
2372 | if (value == UINT64_MAX) | |
2373 | continue; | |
82044702 LP |
2374 | |
2375 | have_ip_accounting = true; | |
a87b1faa LP |
2376 | if (value > 0) |
2377 | any_traffic = true; | |
915b1d01 LP |
2378 | |
2379 | /* Format IP accounting data for inclusion in the structured log message */ | |
2380 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2381 | r = log_oom(); | |
2382 | goto finish; | |
2383 | } | |
2384 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2385 | ||
2386 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2387 | * bytes counters (and not for the packets counters) */ | |
a87b1faa LP |
2388 | if (m == CGROUP_IP_INGRESS_BYTES) { |
2389 | assert(!igress); | |
ec9d636b | 2390 | igress = strjoin("received ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2391 | if (!igress) { |
2392 | r = log_oom(); | |
2393 | goto finish; | |
2394 | } | |
2395 | } else if (m == CGROUP_IP_EGRESS_BYTES) { | |
2396 | assert(!egress); | |
ec9d636b | 2397 | egress = strjoin("sent ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2398 | if (!egress) { |
2399 | r = log_oom(); | |
2400 | goto finish; | |
2401 | } | |
2402 | } | |
37109b85 ZJS |
2403 | |
2404 | if (IN_SET(m, CGROUP_IP_INGRESS_BYTES, CGROUP_IP_EGRESS_BYTES)) | |
2405 | log_level = raise_level(log_level, | |
2406 | value > MENTIONWORTHY_IP_BYTES, | |
2407 | value > NOTICEWORTHY_IP_BYTES); | |
a87b1faa LP |
2408 | } |
2409 | ||
82044702 LP |
2410 | if (have_ip_accounting) { |
2411 | if (any_traffic) { | |
2412 | if (igress) | |
2413 | message_parts[n_message_parts++] = TAKE_PTR(igress); | |
2414 | if (egress) | |
2415 | message_parts[n_message_parts++] = TAKE_PTR(egress); | |
a87b1faa | 2416 | |
82044702 LP |
2417 | } else { |
2418 | char *k; | |
915b1d01 | 2419 | |
82044702 LP |
2420 | k = strdup("no IP traffic"); |
2421 | if (!k) { | |
2422 | r = log_oom(); | |
2423 | goto finish; | |
2424 | } | |
2425 | ||
2426 | message_parts[n_message_parts++] = k; | |
2427 | } | |
915b1d01 LP |
2428 | } |
2429 | ||
2430 | /* Is there any accounting data available at all? */ | |
2431 | if (n_iovec == 0) { | |
2432 | r = 0; | |
2433 | goto finish; | |
2434 | } | |
2435 | ||
2436 | if (n_message_parts == 0) | |
a87b1faa | 2437 | t = strjoina("MESSAGE=", u->id, ": Completed."); |
915b1d01 LP |
2438 | else { |
2439 | _cleanup_free_ char *joined; | |
2440 | ||
2441 | message_parts[n_message_parts] = NULL; | |
2442 | ||
2443 | joined = strv_join(message_parts, ", "); | |
2444 | if (!joined) { | |
2445 | r = log_oom(); | |
2446 | goto finish; | |
2447 | } | |
2448 | ||
ec9d636b | 2449 | joined[0] = ascii_toupper(joined[0]); |
a87b1faa | 2450 | t = strjoina("MESSAGE=", u->id, ": ", joined, "."); |
915b1d01 LP |
2451 | } |
2452 | ||
2453 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2454 | * and hence don't increase n_iovec for them */ | |
2455 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2456 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2457 | ||
2458 | t = strjoina(u->manager->unit_log_field, u->id); | |
2459 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2460 | ||
2461 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2462 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2463 | ||
37109b85 | 2464 | log_struct_iovec(log_level, iovec, n_iovec + 4); |
915b1d01 LP |
2465 | r = 0; |
2466 | ||
2467 | finish: | |
2468 | for (i = 0; i < n_message_parts; i++) | |
2469 | free(message_parts[i]); | |
2470 | ||
2471 | for (i = 0; i < n_iovec; i++) | |
2472 | free(iovec[i].iov_base); | |
2473 | ||
2474 | return r; | |
2475 | ||
2476 | } | |
2477 | ||
adefcf28 LP |
2478 | static void unit_update_on_console(Unit *u) { |
2479 | bool b; | |
2480 | ||
2481 | assert(u); | |
2482 | ||
2483 | b = unit_needs_console(u); | |
2484 | if (u->on_console == b) | |
2485 | return; | |
2486 | ||
2487 | u->on_console = b; | |
2488 | if (b) | |
2489 | manager_ref_console(u->manager); | |
2490 | else | |
2491 | manager_unref_console(u->manager); | |
adefcf28 LP |
2492 | } |
2493 | ||
6eb65e7c LP |
2494 | static void unit_emit_audit_start(Unit *u) { |
2495 | assert(u); | |
2496 | ||
2497 | if (u->type != UNIT_SERVICE) | |
2498 | return; | |
2499 | ||
2500 | /* Write audit record if we have just finished starting up */ | |
2501 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); | |
2502 | u->in_audit = true; | |
2503 | } | |
2504 | ||
2505 | static void unit_emit_audit_stop(Unit *u, UnitActiveState state) { | |
2506 | assert(u); | |
2507 | ||
2508 | if (u->type != UNIT_SERVICE) | |
2509 | return; | |
2510 | ||
2511 | if (u->in_audit) { | |
2512 | /* Write audit record if we have just finished shutting down */ | |
2513 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, state == UNIT_INACTIVE); | |
2514 | u->in_audit = false; | |
2515 | } else { | |
2516 | /* Hmm, if there was no start record written write it now, so that we always have a nice pair */ | |
2517 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, state == UNIT_INACTIVE); | |
2518 | ||
2519 | if (state == UNIT_INACTIVE) | |
2520 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); | |
2521 | } | |
2522 | } | |
2523 | ||
16c74914 LP |
2524 | static bool unit_process_job(Job *j, UnitActiveState ns, UnitNotifyFlags flags) { |
2525 | bool unexpected = false; | |
31cd5f63 | 2526 | JobResult result; |
16c74914 LP |
2527 | |
2528 | assert(j); | |
2529 | ||
2530 | if (j->state == JOB_WAITING) | |
2531 | ||
2532 | /* So we reached a different state for this job. Let's see if we can run it now if it failed previously | |
2533 | * due to EAGAIN. */ | |
2534 | job_add_to_run_queue(j); | |
2535 | ||
2536 | /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and | |
2537 | * hence needs to invalidate jobs. */ | |
2538 | ||
2539 | switch (j->type) { | |
2540 | ||
2541 | case JOB_START: | |
2542 | case JOB_VERIFY_ACTIVE: | |
2543 | ||
2544 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
2545 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2546 | else if (j->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
2547 | unexpected = true; | |
2548 | ||
31cd5f63 AZ |
2549 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
2550 | if (ns == UNIT_FAILED) | |
2551 | result = JOB_FAILED; | |
2552 | else if (FLAGS_SET(flags, UNIT_NOTIFY_SKIP_CONDITION)) | |
2553 | result = JOB_SKIPPED; | |
2554 | else | |
2555 | result = JOB_DONE; | |
2556 | ||
2557 | job_finish_and_invalidate(j, result, true, false); | |
2558 | } | |
16c74914 LP |
2559 | } |
2560 | ||
2561 | break; | |
2562 | ||
2563 | case JOB_RELOAD: | |
2564 | case JOB_RELOAD_OR_START: | |
2565 | case JOB_TRY_RELOAD: | |
2566 | ||
2567 | if (j->state == JOB_RUNNING) { | |
2568 | if (ns == UNIT_ACTIVE) | |
2569 | job_finish_and_invalidate(j, (flags & UNIT_NOTIFY_RELOAD_FAILURE) ? JOB_FAILED : JOB_DONE, true, false); | |
2570 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { | |
2571 | unexpected = true; | |
2572 | ||
2573 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2574 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2575 | } | |
2576 | } | |
2577 | ||
2578 | break; | |
2579 | ||
2580 | case JOB_STOP: | |
2581 | case JOB_RESTART: | |
2582 | case JOB_TRY_RESTART: | |
2583 | ||
2584 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2585 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2586 | else if (j->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
2587 | unexpected = true; | |
2588 | job_finish_and_invalidate(j, JOB_FAILED, true, false); | |
2589 | } | |
2590 | ||
2591 | break; | |
2592 | ||
2593 | default: | |
2594 | assert_not_reached("Job type unknown"); | |
2595 | } | |
2596 | ||
2597 | return unexpected; | |
2598 | } | |
2599 | ||
2ad2e41a | 2600 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, UnitNotifyFlags flags) { |
429926e9 | 2601 | const char *reason; |
8559b3b7 | 2602 | Manager *m; |
a096ed36 | 2603 | |
87f0e418 LP |
2604 | assert(u); |
2605 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2606 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2607 | |
8559b3b7 LP |
2608 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2609 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2610 | * remounted this function will be called too! */ | |
87f0e418 | 2611 | |
546ac4f0 MS |
2612 | m = u->manager; |
2613 | ||
3c4832ad LP |
2614 | /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in |
2615 | * the bus queue, so that any job change signal queued will force out the unit change signal first. */ | |
2616 | unit_add_to_dbus_queue(u); | |
2617 | ||
f755e3b7 | 2618 | /* Update timestamps for state changes */ |
2c289ea8 | 2619 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2620 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2621 | |
bdbf9951 | 2622 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2623 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2624 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2625 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2626 | |
2627 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2628 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2629 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2630 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2631 | } |
87f0e418 | 2632 | |
865cc19a | 2633 | /* Keep track of failed units */ |
8724defe | 2634 | (void) manager_update_failed_units(m, u, ns == UNIT_FAILED); |
f755e3b7 | 2635 | |
d3070fbd LP |
2636 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2637 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
efdb0237 | 2638 | unit_prune_cgroup(u); |
d3070fbd LP |
2639 | unit_unlink_state_files(u); |
2640 | } | |
fb385181 | 2641 | |
adefcf28 | 2642 | unit_update_on_console(u); |
7ed9f6cd | 2643 | |
2c289ea8 | 2644 | if (!MANAGER_IS_RELOADING(m)) { |
a1c7334b LP |
2645 | bool unexpected; |
2646 | ||
2647 | /* Let's propagate state changes to the job */ | |
2648 | if (u->job) | |
2649 | unexpected = unit_process_job(u->job, ns, flags); | |
2650 | else | |
2651 | unexpected = true; | |
f3bff0eb | 2652 | |
a1c7334b LP |
2653 | /* If this state change happened without being requested by a job, then let's retroactively start or |
2654 | * stop dependencies. We skip that step when deserializing, since we don't want to create any | |
2655 | * additional jobs just because something is already activated. */ | |
bdbf9951 LP |
2656 | |
2657 | if (unexpected) { | |
2658 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2659 | retroactively_start_dependencies(u); | |
2660 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2661 | retroactively_stop_dependencies(u); | |
2662 | } | |
5de9682c | 2663 | |
cd0504d0 | 2664 | /* stop unneeded units regardless if going down was expected or not */ |
a3c1168a | 2665 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
cd0504d0 MS |
2666 | check_unneeded_dependencies(u); |
2667 | ||
bdbf9951 | 2668 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2669 | log_unit_debug(u, "Unit entered failed state."); |
2ad2e41a LP |
2670 | |
2671 | if (!(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
2672 | unit_start_on_failure(u); | |
cd6d0a45 | 2673 | } |
e537352b | 2674 | |
256f65d0 LP |
2675 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns) && !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
2676 | /* This unit just finished starting up */ | |
3b2775c5 | 2677 | |
6eb65e7c | 2678 | unit_emit_audit_start(u); |
546ac4f0 | 2679 | manager_send_unit_plymouth(m, u); |
256f65d0 | 2680 | } |
bdbf9951 | 2681 | |
256f65d0 | 2682 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && !UNIT_IS_INACTIVE_OR_FAILED(os)) { |
915b1d01 | 2683 | /* This unit just stopped/failed. */ |
256f65d0 | 2684 | |
6eb65e7c | 2685 | unit_emit_audit_stop(u, ns); |
915b1d01 | 2686 | unit_log_resources(u); |
cd6d0a45 | 2687 | } |
f278026d LP |
2688 | } |
2689 | ||
31dc1ca3 LP |
2690 | manager_recheck_journal(m); |
2691 | manager_recheck_dbus(m); | |
e63ebf71 | 2692 | |
3ecaa09b | 2693 | unit_trigger_notify(u); |
3b2775c5 | 2694 | |
8724defe | 2695 | if (!MANAGER_IS_RELOADING(m)) { |
8559b3b7 | 2696 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ |
fda09318 | 2697 | unit_submit_to_stop_when_unneeded_queue(u); |
c1e1601e | 2698 | |
8559b3b7 LP |
2699 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens when |
2700 | * something BindsTo= to a Type=oneshot unit, as these units go directly from starting to inactive, | |
ff502445 LP |
2701 | * without ever entering started.) */ |
2702 | unit_check_binds_to(u); | |
53c35a76 | 2703 | |
429926e9 TR |
2704 | if (os != UNIT_FAILED && ns == UNIT_FAILED) { |
2705 | reason = strjoina("unit ", u->id, " failed"); | |
36c4dc08 | 2706 | emergency_action(m, u->failure_action, 0, u->reboot_arg, unit_failure_action_exit_status(u), reason); |
429926e9 TR |
2707 | } else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) { |
2708 | reason = strjoina("unit ", u->id, " succeeded"); | |
36c4dc08 | 2709 | emergency_action(m, u->success_action, 0, u->reboot_arg, unit_success_action_exit_status(u), reason); |
429926e9 | 2710 | } |
ff502445 LP |
2711 | } |
2712 | ||
701cc384 | 2713 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2714 | } |
2715 | ||
f75f613d | 2716 | int unit_watch_pid(Unit *u, pid_t pid, bool exclusive) { |
62a76913 | 2717 | int r; |
a911bb9a | 2718 | |
87f0e418 | 2719 | assert(u); |
62a76913 | 2720 | assert(pid_is_valid(pid)); |
87f0e418 | 2721 | |
62a76913 | 2722 | /* Watch a specific PID */ |
5ba6985b | 2723 | |
f75f613d FB |
2724 | /* Caller might be sure that this PID belongs to this unit only. Let's take this |
2725 | * opportunity to remove any stalled references to this PID as they can be created | |
2726 | * easily (when watching a process which is not our direct child). */ | |
2727 | if (exclusive) | |
2728 | manager_unwatch_pid(u->manager, pid); | |
2729 | ||
d5099efc | 2730 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2731 | if (r < 0) |
2732 | return r; | |
2733 | ||
62a76913 | 2734 | r = hashmap_ensure_allocated(&u->manager->watch_pids, NULL); |
a911bb9a LP |
2735 | if (r < 0) |
2736 | return r; | |
2737 | ||
62a76913 LP |
2738 | /* First try, let's add the unit keyed by "pid". */ |
2739 | r = hashmap_put(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2740 | if (r == -EEXIST) { | |
2741 | Unit **array; | |
2742 | bool found = false; | |
2743 | size_t n = 0; | |
05e343b7 | 2744 | |
62a76913 LP |
2745 | /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points |
2746 | * to an array of Units rather than just a Unit), lists us already. */ | |
a911bb9a | 2747 | |
62a76913 LP |
2748 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); |
2749 | if (array) | |
2750 | for (; array[n]; n++) | |
2751 | if (array[n] == u) | |
2752 | found = true; | |
a911bb9a | 2753 | |
62a76913 LP |
2754 | if (found) /* Found it already? if so, do nothing */ |
2755 | r = 0; | |
2756 | else { | |
2757 | Unit **new_array; | |
2758 | ||
2759 | /* Allocate a new array */ | |
2760 | new_array = new(Unit*, n + 2); | |
2761 | if (!new_array) | |
2762 | return -ENOMEM; | |
2763 | ||
2764 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2765 | new_array[n] = u; | |
2766 | new_array[n+1] = NULL; | |
2767 | ||
2768 | /* Add or replace the old array */ | |
2769 | r = hashmap_replace(u->manager->watch_pids, PID_TO_PTR(-pid), new_array); | |
2770 | if (r < 0) { | |
2771 | free(new_array); | |
2772 | return r; | |
2773 | } | |
2774 | ||
2775 | free(array); | |
2776 | } | |
2777 | } else if (r < 0) | |
2778 | return r; | |
2779 | ||
2780 | r = set_put(u->pids, PID_TO_PTR(pid)); | |
2781 | if (r < 0) | |
2782 | return r; | |
2783 | ||
2784 | return 0; | |
87f0e418 LP |
2785 | } |
2786 | ||
2787 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
62a76913 LP |
2788 | Unit **array; |
2789 | ||
87f0e418 | 2790 | assert(u); |
62a76913 LP |
2791 | assert(pid_is_valid(pid)); |
2792 | ||
2793 | /* First let's drop the unit in case it's keyed as "pid". */ | |
2794 | (void) hashmap_remove_value(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2795 | ||
2796 | /* Then, let's also drop the unit, in case it's in the array keyed by -pid */ | |
2797 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); | |
2798 | if (array) { | |
2799 | size_t n, m = 0; | |
2800 | ||
2801 | /* Let's iterate through the array, dropping our own entry */ | |
2802 | for (n = 0; array[n]; n++) | |
2803 | if (array[n] != u) | |
2804 | array[m++] = array[n]; | |
2805 | array[m] = NULL; | |
2806 | ||
2807 | if (m == 0) { | |
2808 | /* The array is now empty, remove the entire entry */ | |
20c3acfa | 2809 | assert_se(hashmap_remove(u->manager->watch_pids, PID_TO_PTR(-pid)) == array); |
62a76913 LP |
2810 | free(array); |
2811 | } | |
2812 | } | |
87f0e418 | 2813 | |
fea72cc0 | 2814 | (void) set_remove(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2815 | } |
2816 | ||
bd44e61b LP |
2817 | void unit_unwatch_all_pids(Unit *u) { |
2818 | assert(u); | |
2819 | ||
2820 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2821 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2822 | |
efdb0237 | 2823 | u->pids = set_free(u->pids); |
a911bb9a LP |
2824 | } |
2825 | ||
50be4f4a LP |
2826 | static void unit_tidy_watch_pids(Unit *u) { |
2827 | pid_t except1, except2; | |
a911bb9a LP |
2828 | Iterator i; |
2829 | void *e; | |
2830 | ||
2831 | assert(u); | |
2832 | ||
2833 | /* Cleans dead PIDs from our list */ | |
2834 | ||
50be4f4a LP |
2835 | except1 = unit_main_pid(u); |
2836 | except2 = unit_control_pid(u); | |
2837 | ||
a911bb9a | 2838 | SET_FOREACH(e, u->pids, i) { |
fea72cc0 | 2839 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2840 | |
2841 | if (pid == except1 || pid == except2) | |
2842 | continue; | |
2843 | ||
9f5650ae | 2844 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2845 | unit_unwatch_pid(u, pid); |
a911bb9a | 2846 | } |
87f0e418 LP |
2847 | } |
2848 | ||
50be4f4a LP |
2849 | static int on_rewatch_pids_event(sd_event_source *s, void *userdata) { |
2850 | Unit *u = userdata; | |
2851 | ||
2852 | assert(s); | |
2853 | assert(u); | |
2854 | ||
2855 | unit_tidy_watch_pids(u); | |
2856 | unit_watch_all_pids(u); | |
2857 | ||
2858 | /* If the PID set is empty now, then let's finish this off. */ | |
2859 | unit_synthesize_cgroup_empty_event(u); | |
2860 | ||
2861 | return 0; | |
2862 | } | |
2863 | ||
2864 | int unit_enqueue_rewatch_pids(Unit *u) { | |
2865 | int r; | |
2866 | ||
2867 | assert(u); | |
2868 | ||
2869 | if (!u->cgroup_path) | |
2870 | return -ENOENT; | |
2871 | ||
2872 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
2873 | if (r < 0) | |
2874 | return r; | |
2875 | if (r > 0) /* On unified we can use proper notifications */ | |
2876 | return 0; | |
2877 | ||
2878 | /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new | |
2879 | * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it | |
2880 | * involves issuing kill(pid, 0) on all processes we watch. */ | |
2881 | ||
2882 | if (!u->rewatch_pids_event_source) { | |
2883 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
2884 | ||
2885 | r = sd_event_add_defer(u->manager->event, &s, on_rewatch_pids_event, u); | |
2886 | if (r < 0) | |
2887 | return log_error_errno(r, "Failed to allocate event source for tidying watched PIDs: %m"); | |
2888 | ||
2889 | r = sd_event_source_set_priority(s, SD_EVENT_PRIORITY_IDLE); | |
2890 | if (r < 0) | |
28b77ab2 | 2891 | return log_error_errno(r, "Failed to adjust priority of event source for tidying watched PIDs: %m"); |
50be4f4a LP |
2892 | |
2893 | (void) sd_event_source_set_description(s, "tidy-watch-pids"); | |
2894 | ||
2895 | u->rewatch_pids_event_source = TAKE_PTR(s); | |
2896 | } | |
2897 | ||
2898 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_ONESHOT); | |
2899 | if (r < 0) | |
2900 | return log_error_errno(r, "Failed to enable event source for tidying watched PIDs: %m"); | |
2901 | ||
2902 | return 0; | |
2903 | } | |
2904 | ||
2905 | void unit_dequeue_rewatch_pids(Unit *u) { | |
2906 | int r; | |
2907 | assert(u); | |
2908 | ||
2909 | if (!u->rewatch_pids_event_source) | |
2910 | return; | |
2911 | ||
2912 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_OFF); | |
2913 | if (r < 0) | |
2914 | log_warning_errno(r, "Failed to disable event source for tidying watched PIDs, ignoring: %m"); | |
2915 | ||
2916 | u->rewatch_pids_event_source = sd_event_source_unref(u->rewatch_pids_event_source); | |
2917 | } | |
2918 | ||
87f0e418 LP |
2919 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2920 | assert(u); | |
2921 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2922 | ||
2923 | switch (j) { | |
2924 | ||
2925 | case JOB_VERIFY_ACTIVE: | |
2926 | case JOB_START: | |
e0209d83 | 2927 | case JOB_NOP: |
f5869324 | 2928 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
86b52a39 | 2929 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueuing |
f5869324 | 2930 | * jobs for it. */ |
87f0e418 LP |
2931 | return true; |
2932 | ||
f5869324 LP |
2933 | case JOB_STOP: |
2934 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
86b52a39 | 2935 | * external events), hence it makes no sense to permit enqueuing such a request either. */ |
f5869324 LP |
2936 | return !u->perpetual; |
2937 | ||
87f0e418 LP |
2938 | case JOB_RESTART: |
2939 | case JOB_TRY_RESTART: | |
f5869324 | 2940 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
2941 | |
2942 | case JOB_RELOAD: | |
3282591d | 2943 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2944 | return unit_can_reload(u); |
2945 | ||
2946 | case JOB_RELOAD_OR_START: | |
2947 | return unit_can_reload(u) && unit_can_start(u); | |
2948 | ||
2949 | default: | |
2950 | assert_not_reached("Invalid job type"); | |
2951 | } | |
2952 | } | |
2953 | ||
f2341e0a LP |
2954 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2955 | assert(u); | |
d1fab3fe | 2956 | |
f2341e0a LP |
2957 | /* Only warn about some unit types */ |
2958 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2959 | return; | |
3f3cc397 | 2960 | |
f2341e0a LP |
2961 | if (streq_ptr(u->id, other)) |
2962 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2963 | else | |
2964 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2965 | } |
2966 | ||
eef85c4a LP |
2967 | static int unit_add_dependency_hashmap( |
2968 | Hashmap **h, | |
2969 | Unit *other, | |
2970 | UnitDependencyMask origin_mask, | |
2971 | UnitDependencyMask destination_mask) { | |
2972 | ||
2973 | UnitDependencyInfo info; | |
2974 | int r; | |
2975 | ||
2976 | assert(h); | |
2977 | assert(other); | |
2978 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2979 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2980 | assert(origin_mask > 0 || destination_mask > 0); | |
2981 | ||
2982 | r = hashmap_ensure_allocated(h, NULL); | |
2983 | if (r < 0) | |
2984 | return r; | |
2985 | ||
2986 | assert_cc(sizeof(void*) == sizeof(info)); | |
2987 | ||
2988 | info.data = hashmap_get(*h, other); | |
2989 | if (info.data) { | |
2990 | /* Entry already exists. Add in our mask. */ | |
2991 | ||
d94a24ca ZJS |
2992 | if (FLAGS_SET(origin_mask, info.origin_mask) && |
2993 | FLAGS_SET(destination_mask, info.destination_mask)) | |
eef85c4a LP |
2994 | return 0; /* NOP */ |
2995 | ||
2996 | info.origin_mask |= origin_mask; | |
2997 | info.destination_mask |= destination_mask; | |
2998 | ||
2999 | r = hashmap_update(*h, other, info.data); | |
3000 | } else { | |
3001 | info = (UnitDependencyInfo) { | |
3002 | .origin_mask = origin_mask, | |
3003 | .destination_mask = destination_mask, | |
3004 | }; | |
3005 | ||
3006 | r = hashmap_put(*h, other, info.data); | |
3007 | } | |
3008 | if (r < 0) | |
3009 | return r; | |
3010 | ||
3011 | return 1; | |
3012 | } | |
3013 | ||
3014 | int unit_add_dependency( | |
3015 | Unit *u, | |
3016 | UnitDependency d, | |
3017 | Unit *other, | |
3018 | bool add_reference, | |
3019 | UnitDependencyMask mask) { | |
87f0e418 LP |
3020 | |
3021 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
3022 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 3023 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 3024 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 3025 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 3026 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 3027 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 3028 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 3029 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 3030 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 3031 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
3032 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
3033 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 3034 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 3035 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 3036 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 3037 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
3038 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
3039 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 3040 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 3041 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 3042 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 3043 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 3044 | }; |
eef85c4a LP |
3045 | Unit *original_u = u, *original_other = other; |
3046 | int r; | |
87f0e418 LP |
3047 | |
3048 | assert(u); | |
3049 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
3050 | assert(other); |
3051 | ||
9f151f29 LP |
3052 | u = unit_follow_merge(u); |
3053 | other = unit_follow_merge(other); | |
3054 | ||
87f0e418 LP |
3055 | /* We won't allow dependencies on ourselves. We will not |
3056 | * consider them an error however. */ | |
d1fab3fe | 3057 | if (u == other) { |
eef85c4a | 3058 | maybe_warn_about_dependency(original_u, original_other->id, d); |
87f0e418 | 3059 | return 0; |
d1fab3fe | 3060 | } |
87f0e418 | 3061 | |
b862c257 FB |
3062 | /* Note that ordering a device unit after a unit is permitted since it |
3063 | * allows to start its job running timeout at a specific time. */ | |
3064 | if (d == UNIT_BEFORE && other->type == UNIT_DEVICE) { | |
3065 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); | |
c80a9a33 LP |
3066 | return 0; |
3067 | } | |
3068 | ||
3069 | if (d == UNIT_ON_FAILURE && !UNIT_VTABLE(u)->can_fail) { | |
3070 | log_unit_warning(u, "Requested dependency OnFailure=%s ignored (%s units cannot fail).", other->id, unit_type_to_string(u->type)); | |
3071 | return 0; | |
3072 | } | |
3073 | ||
3074 | if (d == UNIT_TRIGGERS && !UNIT_VTABLE(u)->can_trigger) | |
3075 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3076 | "Requested dependency Triggers=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(u->type)); | |
3077 | if (d == UNIT_TRIGGERED_BY && !UNIT_VTABLE(other)->can_trigger) | |
3078 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3079 | "Requested dependency TriggeredBy=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(other->type)); | |
3080 | ||
eef85c4a | 3081 | r = unit_add_dependency_hashmap(u->dependencies + d, other, mask, 0); |
613b411c | 3082 | if (r < 0) |
87f0e418 LP |
3083 | return r; |
3084 | ||
eef85c4a LP |
3085 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
3086 | r = unit_add_dependency_hashmap(other->dependencies + inverse_table[d], u, 0, mask); | |
613b411c LP |
3087 | if (r < 0) |
3088 | return r; | |
3089 | } | |
3090 | ||
3091 | if (add_reference) { | |
eef85c4a | 3092 | r = unit_add_dependency_hashmap(u->dependencies + UNIT_REFERENCES, other, mask, 0); |
613b411c | 3093 | if (r < 0) |
5de9682c LP |
3094 | return r; |
3095 | ||
eef85c4a | 3096 | r = unit_add_dependency_hashmap(other->dependencies + UNIT_REFERENCED_BY, u, 0, mask); |
613b411c | 3097 | if (r < 0) |
701cc384 | 3098 | return r; |
613b411c | 3099 | } |
87f0e418 | 3100 | |
c1e1601e | 3101 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
3102 | return 0; |
3103 | } | |
0301abf4 | 3104 | |
eef85c4a | 3105 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
2c966c03 LP |
3106 | int r; |
3107 | ||
3108 | assert(u); | |
3109 | ||
eef85c4a | 3110 | r = unit_add_dependency(u, d, other, add_reference, mask); |
3f3cc397 | 3111 | if (r < 0) |
2c966c03 LP |
3112 | return r; |
3113 | ||
eef85c4a | 3114 | return unit_add_dependency(u, e, other, add_reference, mask); |
2c966c03 LP |
3115 | } |
3116 | ||
23e8c796 | 3117 | static int resolve_template(Unit *u, const char *name, char **buf, const char **ret) { |
7410616c | 3118 | int r; |
9e2f7c11 LP |
3119 | |
3120 | assert(u); | |
23e8c796 | 3121 | assert(name); |
7410616c LP |
3122 | assert(buf); |
3123 | assert(ret); | |
9e2f7c11 | 3124 | |
7410616c LP |
3125 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
3126 | *buf = NULL; | |
3127 | *ret = name; | |
3128 | return 0; | |
9e2f7c11 LP |
3129 | } |
3130 | ||
ac155bb8 | 3131 | if (u->instance) |
7410616c | 3132 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 3133 | else { |
ae018d9b | 3134 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 3135 | |
7410616c LP |
3136 | r = unit_name_to_prefix(u->id, &i); |
3137 | if (r < 0) | |
3138 | return r; | |
9e2f7c11 | 3139 | |
7410616c | 3140 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 3141 | } |
7410616c LP |
3142 | if (r < 0) |
3143 | return r; | |
9e2f7c11 | 3144 | |
7410616c LP |
3145 | *ret = *buf; |
3146 | return 0; | |
9e2f7c11 LP |
3147 | } |
3148 | ||
35d8c19a | 3149 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3150 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
3151 | Unit *other; |
3152 | int r; | |
3153 | ||
9e2f7c11 | 3154 | assert(u); |
35d8c19a | 3155 | assert(name); |
09b6b09f | 3156 | |
23e8c796 | 3157 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3158 | if (r < 0) |
3159 | return r; | |
09b6b09f | 3160 | |
35d8c19a | 3161 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
8afbb8e1 LP |
3162 | if (r < 0) |
3163 | return r; | |
9e2f7c11 | 3164 | |
eef85c4a | 3165 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
3166 | } |
3167 | ||
5a724170 | 3168 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3169 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
3170 | Unit *other; |
3171 | int r; | |
2c966c03 LP |
3172 | |
3173 | assert(u); | |
5a724170 | 3174 | assert(name); |
2c966c03 | 3175 | |
23e8c796 | 3176 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3177 | if (r < 0) |
3178 | return r; | |
2c966c03 | 3179 | |
5a724170 | 3180 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
3f3cc397 | 3181 | if (r < 0) |
68eda4bd | 3182 | return r; |
2c966c03 | 3183 | |
eef85c4a | 3184 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
3185 | } |
3186 | ||
0301abf4 | 3187 | int set_unit_path(const char *p) { |
0301abf4 | 3188 | /* This is mostly for debug purposes */ |
cbe46ead | 3189 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 3190 | return -errno; |
0301abf4 LP |
3191 | |
3192 | return 0; | |
3193 | } | |
88066b3a | 3194 | |
ea430986 | 3195 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
3196 | assert(u); |
3197 | ||
ac155bb8 | 3198 | if (!u->id) |
04ade7d2 LP |
3199 | return NULL; |
3200 | ||
48899192 | 3201 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
3202 | } |
3203 | ||
4b58153d LP |
3204 | char *unit_dbus_path_invocation_id(Unit *u) { |
3205 | assert(u); | |
3206 | ||
3207 | if (sd_id128_is_null(u->invocation_id)) | |
3208 | return NULL; | |
3209 | ||
3210 | return unit_dbus_path_from_name(u->invocation_id_string); | |
3211 | } | |
3212 | ||
db868d45 ZJS |
3213 | static int unit_set_invocation_id(Unit *u, sd_id128_t id) { |
3214 | int r; | |
3215 | ||
3216 | assert(u); | |
3217 | ||
3218 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
3219 | ||
3220 | if (sd_id128_equal(u->invocation_id, id)) | |
3221 | return 0; | |
3222 | ||
3223 | if (!sd_id128_is_null(u->invocation_id)) | |
3224 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3225 | ||
3226 | if (sd_id128_is_null(id)) { | |
3227 | r = 0; | |
3228 | goto reset; | |
3229 | } | |
3230 | ||
3231 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
3232 | if (r < 0) | |
3233 | goto reset; | |
3234 | ||
3235 | u->invocation_id = id; | |
3236 | sd_id128_to_string(id, u->invocation_id_string); | |
3237 | ||
3238 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3239 | if (r < 0) | |
3240 | goto reset; | |
3241 | ||
3242 | return 0; | |
3243 | ||
3244 | reset: | |
3245 | u->invocation_id = SD_ID128_NULL; | |
3246 | u->invocation_id_string[0] = 0; | |
3247 | return r; | |
3248 | } | |
3249 | ||
d79200e2 LP |
3250 | int unit_set_slice(Unit *u, Unit *slice) { |
3251 | assert(u); | |
3252 | assert(slice); | |
3253 | ||
3254 | /* Sets the unit slice if it has not been set before. Is extra | |
3255 | * careful, to only allow this for units that actually have a | |
3256 | * cgroup context. Also, we don't allow to set this for slices | |
3257 | * (since the parent slice is derived from the name). Make | |
3258 | * sure the unit we set is actually a slice. */ | |
3259 | ||
3260 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3261 | return -EOPNOTSUPP; | |
3262 | ||
3263 | if (u->type == UNIT_SLICE) | |
3264 | return -EINVAL; | |
3265 | ||
102ef982 LP |
3266 | if (unit_active_state(u) != UNIT_INACTIVE) |
3267 | return -EBUSY; | |
3268 | ||
d79200e2 LP |
3269 | if (slice->type != UNIT_SLICE) |
3270 | return -EINVAL; | |
3271 | ||
efdb0237 LP |
3272 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
3273 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
3274 | return -EPERM; | |
3275 | ||
d79200e2 LP |
3276 | if (UNIT_DEREF(u->slice) == slice) |
3277 | return 0; | |
3278 | ||
99e66921 TH |
3279 | /* Disallow slice changes if @u is already bound to cgroups */ |
3280 | if (UNIT_ISSET(u->slice) && u->cgroup_realized) | |
d79200e2 LP |
3281 | return -EBUSY; |
3282 | ||
7f7d01ed | 3283 | unit_ref_set(&u->slice, u, slice); |
d79200e2 LP |
3284 | return 1; |
3285 | } | |
3286 | ||
3287 | int unit_set_default_slice(Unit *u) { | |
a8833944 | 3288 | const char *slice_name; |
a016b922 LP |
3289 | Unit *slice; |
3290 | int r; | |
3291 | ||
3292 | assert(u); | |
3293 | ||
9444b1f2 | 3294 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
3295 | return 0; |
3296 | ||
a8833944 LP |
3297 | if (u->instance) { |
3298 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 3299 | |
a8833944 LP |
3300 | /* Implicitly place all instantiated units in their |
3301 | * own per-template slice */ | |
3302 | ||
7410616c LP |
3303 | r = unit_name_to_prefix(u->id, &prefix); |
3304 | if (r < 0) | |
3305 | return r; | |
a8833944 LP |
3306 | |
3307 | /* The prefix is already escaped, but it might include | |
3308 | * "-" which has a special meaning for slice units, | |
3309 | * hence escape it here extra. */ | |
7410616c | 3310 | escaped = unit_name_escape(prefix); |
a8833944 LP |
3311 | if (!escaped) |
3312 | return -ENOMEM; | |
3313 | ||
463d0d15 | 3314 | if (MANAGER_IS_SYSTEM(u->manager)) |
00e7b3c8 | 3315 | slice_name = strjoina("system-", escaped, ".slice"); |
a8833944 | 3316 | else |
00e7b3c8 | 3317 | slice_name = strjoina(escaped, ".slice"); |
a8833944 LP |
3318 | } else |
3319 | slice_name = | |
463d0d15 | 3320 | MANAGER_IS_SYSTEM(u->manager) && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
3321 | ? SPECIAL_SYSTEM_SLICE |
3322 | : SPECIAL_ROOT_SLICE; | |
3323 | ||
3324 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
3325 | if (r < 0) |
3326 | return r; | |
3327 | ||
d79200e2 | 3328 | return unit_set_slice(u, slice); |
a016b922 LP |
3329 | } |
3330 | ||
9444b1f2 LP |
3331 | const char *unit_slice_name(Unit *u) { |
3332 | assert(u); | |
3333 | ||
3334 | if (!UNIT_ISSET(u->slice)) | |
3335 | return NULL; | |
3336 | ||
3337 | return UNIT_DEREF(u->slice)->id; | |
3338 | } | |
3339 | ||
f6ff8c29 | 3340 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 3341 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
3342 | int r; |
3343 | ||
3344 | assert(u); | |
3345 | assert(type); | |
3346 | assert(_found); | |
3347 | ||
7410616c LP |
3348 | r = unit_name_change_suffix(u->id, type, &t); |
3349 | if (r < 0) | |
3350 | return r; | |
3351 | if (unit_has_name(u, t)) | |
3352 | return -EINVAL; | |
f6ff8c29 | 3353 | |
ac155bb8 | 3354 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3355 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3356 | return r; |
3357 | } | |
3358 | ||
bbc29086 | 3359 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
fc67a943 | 3360 | const char *new_owner; |
bbc29086 DM |
3361 | Unit *u = userdata; |
3362 | int r; | |
3363 | ||
3364 | assert(message); | |
3365 | assert(u); | |
3366 | ||
fc67a943 | 3367 | r = sd_bus_message_read(message, "sss", NULL, NULL, &new_owner); |
bbc29086 DM |
3368 | if (r < 0) { |
3369 | bus_log_parse_error(r); | |
3370 | return 0; | |
3371 | } | |
3372 | ||
3373 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3374 | UNIT_VTABLE(u)->bus_name_owner_change(u, empty_to_null(new_owner)); |
a5a8776a MJ |
3375 | |
3376 | return 0; | |
3377 | } | |
3378 | ||
3379 | static int get_name_owner_handler(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
3380 | const sd_bus_error *e; | |
3381 | const char *new_owner; | |
3382 | Unit *u = userdata; | |
3383 | int r; | |
3384 | ||
3385 | assert(message); | |
3386 | assert(u); | |
3387 | ||
3388 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); | |
3389 | ||
a5a8776a | 3390 | e = sd_bus_message_get_error(message); |
a5a8776a | 3391 | if (e) { |
a54654ba LP |
3392 | if (!sd_bus_error_has_name(e, "org.freedesktop.DBus.Error.NameHasNoOwner")) |
3393 | log_unit_error(u, "Unexpected error response from GetNameOwner(): %s", e->message); | |
a5a8776a | 3394 | |
fc67a943 LP |
3395 | new_owner = NULL; |
3396 | } else { | |
3397 | r = sd_bus_message_read(message, "s", &new_owner); | |
3398 | if (r < 0) | |
3399 | return bus_log_parse_error(r); | |
a5a8776a | 3400 | |
fc67a943 LP |
3401 | assert(!isempty(new_owner)); |
3402 | } | |
a5a8776a MJ |
3403 | |
3404 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3405 | UNIT_VTABLE(u)->bus_name_owner_change(u, new_owner); |
bbc29086 DM |
3406 | |
3407 | return 0; | |
3408 | } | |
3409 | ||
9806e87d LP |
3410 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3411 | const char *match; | |
a5b07847 | 3412 | int r; |
bbc29086 | 3413 | |
9806e87d LP |
3414 | assert(u); |
3415 | assert(bus); | |
3416 | assert(name); | |
bbc29086 | 3417 | |
a5b07847 | 3418 | if (u->match_bus_slot || u->get_name_owner_slot) |
bbc29086 DM |
3419 | return -EBUSY; |
3420 | ||
9806e87d | 3421 | match = strjoina("type='signal'," |
81d62103 ZJS |
3422 | "sender='org.freedesktop.DBus'," |
3423 | "path='/org/freedesktop/DBus'," | |
3424 | "interface='org.freedesktop.DBus'," | |
3425 | "member='NameOwnerChanged'," | |
3426 | "arg0='", name, "'"); | |
bbc29086 | 3427 | |
a5b07847 | 3428 | r = sd_bus_add_match_async(bus, &u->match_bus_slot, match, signal_name_owner_changed, NULL, u); |
a5a8776a MJ |
3429 | if (r < 0) |
3430 | return r; | |
3431 | ||
a5b07847 LP |
3432 | r = sd_bus_call_method_async( |
3433 | bus, | |
3434 | &u->get_name_owner_slot, | |
3435 | "org.freedesktop.DBus", | |
3436 | "/org/freedesktop/DBus", | |
3437 | "org.freedesktop.DBus", | |
3438 | "GetNameOwner", | |
3439 | get_name_owner_handler, | |
3440 | u, | |
3441 | "s", name); | |
3442 | if (r < 0) { | |
3443 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3444 | return r; | |
3445 | } | |
3446 | ||
3447 | log_unit_debug(u, "Watching D-Bus name '%s'.", name); | |
3448 | return 0; | |
bbc29086 DM |
3449 | } |
3450 | ||
05e343b7 | 3451 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3452 | int r; |
3453 | ||
05e343b7 LP |
3454 | assert(u); |
3455 | assert(name); | |
3456 | ||
3457 | /* Watch a specific name on the bus. We only support one unit | |
3458 | * watching each name for now. */ | |
3459 | ||
bbc29086 DM |
3460 | if (u->manager->api_bus) { |
3461 | /* If the bus is already available, install the match directly. | |
3462 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3463 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3464 | if (r < 0) |
8ea823b6 | 3465 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3466 | } |
3467 | ||
3468 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3469 | if (r < 0) { | |
3470 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
a5b07847 | 3471 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
bbc29086 DM |
3472 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); |
3473 | } | |
3474 | ||
3475 | return 0; | |
05e343b7 LP |
3476 | } |
3477 | ||
3478 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3479 | assert(u); | |
3480 | assert(name); | |
3481 | ||
8367fea5 | 3482 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3483 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
a5a8776a | 3484 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
05e343b7 LP |
3485 | } |
3486 | ||
a16e1123 LP |
3487 | bool unit_can_serialize(Unit *u) { |
3488 | assert(u); | |
3489 | ||
3490 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
3491 | } | |
3492 | ||
d68c645b | 3493 | static int serialize_cgroup_mask(FILE *f, const char *key, CGroupMask mask) { |
8b108bd0 | 3494 | _cleanup_free_ char *s = NULL; |
d68c645b | 3495 | int r; |
8b108bd0 FB |
3496 | |
3497 | assert(f); | |
3498 | assert(key); | |
3499 | ||
d68c645b LP |
3500 | if (mask == 0) |
3501 | return 0; | |
3502 | ||
3503 | r = cg_mask_to_string(mask, &s); | |
3504 | if (r < 0) | |
3505 | return log_error_errno(r, "Failed to format cgroup mask: %m"); | |
3506 | ||
3507 | return serialize_item(f, key, s); | |
8b108bd0 FB |
3508 | } |
3509 | ||
b82f71c7 | 3510 | static const char *const ip_accounting_metric_field[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { |
6b659ed8 LP |
3511 | [CGROUP_IP_INGRESS_BYTES] = "ip-accounting-ingress-bytes", |
3512 | [CGROUP_IP_INGRESS_PACKETS] = "ip-accounting-ingress-packets", | |
3513 | [CGROUP_IP_EGRESS_BYTES] = "ip-accounting-egress-bytes", | |
3514 | [CGROUP_IP_EGRESS_PACKETS] = "ip-accounting-egress-packets", | |
3515 | }; | |
3516 | ||
fbe14fc9 LP |
3517 | static const char *const io_accounting_metric_field_base[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
3518 | [CGROUP_IO_READ_BYTES] = "io-accounting-read-bytes-base", | |
3519 | [CGROUP_IO_WRITE_BYTES] = "io-accounting-write-bytes-base", | |
3520 | [CGROUP_IO_READ_OPERATIONS] = "io-accounting-read-operations-base", | |
3521 | [CGROUP_IO_WRITE_OPERATIONS] = "io-accounting-write-operations-base", | |
3522 | }; | |
3523 | ||
3524 | static const char *const io_accounting_metric_field_last[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { | |
3525 | [CGROUP_IO_READ_BYTES] = "io-accounting-read-bytes-last", | |
3526 | [CGROUP_IO_WRITE_BYTES] = "io-accounting-write-bytes-last", | |
3527 | [CGROUP_IO_READ_OPERATIONS] = "io-accounting-read-operations-last", | |
3528 | [CGROUP_IO_WRITE_OPERATIONS] = "io-accounting-write-operations-last", | |
3529 | }; | |
3530 | ||
6b78f9b4 | 3531 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
6b659ed8 | 3532 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3533 | int r; |
3534 | ||
3535 | assert(u); | |
3536 | assert(f); | |
3537 | assert(fds); | |
3538 | ||
9bdb98c5 | 3539 | if (unit_can_serialize(u)) { |
9bdb98c5 | 3540 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
3541 | if (r < 0) |
3542 | return r; | |
e0209d83 MS |
3543 | } |
3544 | ||
d68c645b | 3545 | (void) serialize_dual_timestamp(f, "state-change-timestamp", &u->state_change_timestamp); |
a483fb59 | 3546 | |
d68c645b LP |
3547 | (void) serialize_dual_timestamp(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
3548 | (void) serialize_dual_timestamp(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
3549 | (void) serialize_dual_timestamp(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
3550 | (void) serialize_dual_timestamp(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
a483fb59 | 3551 | |
d68c645b LP |
3552 | (void) serialize_dual_timestamp(f, "condition-timestamp", &u->condition_timestamp); |
3553 | (void) serialize_dual_timestamp(f, "assert-timestamp", &u->assert_timestamp); | |
2791a8f8 | 3554 | |
ac155bb8 | 3555 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
d68c645b | 3556 | (void) serialize_bool(f, "condition-result", u->condition_result); |
10717a1a | 3557 | |
59fccdc5 | 3558 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
d68c645b | 3559 | (void) serialize_bool(f, "assert-result", u->assert_result); |
59fccdc5 | 3560 | |
d68c645b LP |
3561 | (void) serialize_bool(f, "transient", u->transient); |
3562 | (void) serialize_bool(f, "in-audit", u->in_audit); | |
fe700f46 | 3563 | |
d68c645b LP |
3564 | (void) serialize_bool(f, "exported-invocation-id", u->exported_invocation_id); |
3565 | (void) serialize_bool(f, "exported-log-level-max", u->exported_log_level_max); | |
3566 | (void) serialize_bool(f, "exported-log-extra-fields", u->exported_log_extra_fields); | |
5ac1530e ZJS |
3567 | (void) serialize_bool(f, "exported-log-rate-limit-interval", u->exported_log_ratelimit_interval); |
3568 | (void) serialize_bool(f, "exported-log-rate-limit-burst", u->exported_log_ratelimit_burst); | |
0e699122 | 3569 | |
d68c645b | 3570 | (void) serialize_item_format(f, "cpu-usage-base", "%" PRIu64, u->cpu_usage_base); |
fe700f46 | 3571 | if (u->cpu_usage_last != NSEC_INFINITY) |
d68c645b | 3572 | (void) serialize_item_format(f, "cpu-usage-last", "%" PRIu64, u->cpu_usage_last); |
c2756a68 | 3573 | |
afcfaa69 LP |
3574 | if (u->oom_kill_last > 0) |
3575 | (void) serialize_item_format(f, "oom-kill-last", "%" PRIu64, u->oom_kill_last); | |
3576 | ||
fbe14fc9 LP |
3577 | for (CGroupIOAccountingMetric im = 0; im < _CGROUP_IO_ACCOUNTING_METRIC_MAX; im++) { |
3578 | (void) serialize_item_format(f, io_accounting_metric_field_base[im], "%" PRIu64, u->io_accounting_base[im]); | |
3579 | ||
3580 | if (u->io_accounting_last[im] != UINT64_MAX) | |
3581 | (void) serialize_item_format(f, io_accounting_metric_field_last[im], "%" PRIu64, u->io_accounting_last[im]); | |
3582 | } | |
3583 | ||
c2756a68 | 3584 | if (u->cgroup_path) |
d68c645b LP |
3585 | (void) serialize_item(f, "cgroup", u->cgroup_path); |
3586 | ||
3587 | (void) serialize_bool(f, "cgroup-realized", u->cgroup_realized); | |
3588 | (void) serialize_cgroup_mask(f, "cgroup-realized-mask", u->cgroup_realized_mask); | |
3589 | (void) serialize_cgroup_mask(f, "cgroup-enabled-mask", u->cgroup_enabled_mask); | |
3590 | (void) serialize_cgroup_mask(f, "cgroup-invalidated-mask", u->cgroup_invalidated_mask); | |
c2756a68 | 3591 | |
00d9ef85 | 3592 | if (uid_is_valid(u->ref_uid)) |
d68c645b | 3593 | (void) serialize_item_format(f, "ref-uid", UID_FMT, u->ref_uid); |
00d9ef85 | 3594 | if (gid_is_valid(u->ref_gid)) |
d68c645b | 3595 | (void) serialize_item_format(f, "ref-gid", GID_FMT, u->ref_gid); |
00d9ef85 | 3596 | |
4b58153d | 3597 | if (!sd_id128_is_null(u->invocation_id)) |
d68c645b | 3598 | (void) serialize_item_format(f, "invocation-id", SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(u->invocation_id)); |
4b58153d | 3599 | |
d9e45bc3 MS |
3600 | (void) serialize_item_format(f, "freezer-state", "%s", freezer_state_to_string(unit_freezer_state(u))); |
3601 | ||
05a98afd LP |
3602 | bus_track_serialize(u->bus_track, f, "ref"); |
3603 | ||
6b659ed8 LP |
3604 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
3605 | uint64_t v; | |
3606 | ||
3607 | r = unit_get_ip_accounting(u, m, &v); | |
3608 | if (r >= 0) | |
d68c645b | 3609 | (void) serialize_item_format(f, ip_accounting_metric_field[m], "%" PRIu64, v); |
6b659ed8 LP |
3610 | } |
3611 | ||
613b411c LP |
3612 | if (serialize_jobs) { |
3613 | if (u->job) { | |
d68c645b | 3614 | fputs("job\n", f); |
05a98afd | 3615 | job_serialize(u->job, f); |
613b411c LP |
3616 | } |
3617 | ||
3618 | if (u->nop_job) { | |
d68c645b | 3619 | fputs("job\n", f); |
05a98afd | 3620 | job_serialize(u->nop_job, f); |
613b411c LP |
3621 | } |
3622 | } | |
3623 | ||
a16e1123 LP |
3624 | /* End marker */ |
3625 | fputc('\n', f); | |
3626 | return 0; | |
3627 | } | |
3628 | ||
b17c9620 LP |
3629 | static int unit_deserialize_job(Unit *u, FILE *f) { |
3630 | _cleanup_(job_freep) Job *j = NULL; | |
3631 | int r; | |
3632 | ||
3633 | assert(u); | |
3634 | assert(f); | |
3635 | ||
3636 | j = job_new_raw(u); | |
3637 | if (!j) | |
3638 | return log_oom(); | |
3639 | ||
3640 | r = job_deserialize(j, f); | |
3641 | if (r < 0) | |
3642 | return r; | |
3643 | ||
3644 | r = job_install_deserialized(j); | |
3645 | if (r < 0) | |
3646 | return r; | |
3647 | ||
3648 | TAKE_PTR(j); | |
3649 | return 0; | |
3650 | } | |
3651 | ||
a16e1123 LP |
3652 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
3653 | int r; | |
3654 | ||
3655 | assert(u); | |
3656 | assert(f); | |
3657 | assert(fds); | |
3658 | ||
a16e1123 | 3659 | for (;;) { |
8948b341 | 3660 | _cleanup_free_ char *line = NULL; |
8948b341 | 3661 | char *l, *v; |
83f18c91 | 3662 | ssize_t m; |
a16e1123 LP |
3663 | size_t k; |
3664 | ||
8948b341 LP |
3665 | r = read_line(f, LONG_LINE_MAX, &line); |
3666 | if (r < 0) | |
3667 | return log_error_errno(r, "Failed to read serialization line: %m"); | |
3668 | if (r == 0) /* eof */ | |
3669 | break; | |
a16e1123 LP |
3670 | |
3671 | l = strstrip(line); | |
8948b341 | 3672 | if (isempty(l)) /* End marker */ |
a483fb59 | 3673 | break; |
a16e1123 LP |
3674 | |
3675 | k = strcspn(l, "="); | |
3676 | ||
3677 | if (l[k] == '=') { | |
3678 | l[k] = 0; | |
3679 | v = l+k+1; | |
3680 | } else | |
3681 | v = l+k; | |
3682 | ||
cca098b0 | 3683 | if (streq(l, "job")) { |
39a18c60 | 3684 | if (v[0] == '\0') { |
b17c9620 LP |
3685 | /* New-style serialized job */ |
3686 | r = unit_deserialize_job(u, f); | |
3687 | if (r < 0) | |
e0209d83 | 3688 | return r; |
b17c9620 | 3689 | } else /* Legacy for pre-44 */ |
ed10fa8c | 3690 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); |
cca098b0 | 3691 | continue; |
a483fb59 | 3692 | } else if (streq(l, "state-change-timestamp")) { |
d68c645b | 3693 | (void) deserialize_dual_timestamp(v, &u->state_change_timestamp); |
a483fb59 | 3694 | continue; |
8aaf019b | 3695 | } else if (streq(l, "inactive-exit-timestamp")) { |
d68c645b | 3696 | (void) deserialize_dual_timestamp(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
3697 | continue; |
3698 | } else if (streq(l, "active-enter-timestamp")) { | |
d68c645b | 3699 | (void) deserialize_dual_timestamp(v, &u->active_enter_timestamp); |
8aaf019b LP |
3700 | continue; |
3701 | } else if (streq(l, "active-exit-timestamp")) { | |
d68c645b | 3702 | (void) deserialize_dual_timestamp(v, &u->active_exit_timestamp); |
8aaf019b LP |
3703 | continue; |
3704 | } else if (streq(l, "inactive-enter-timestamp")) { | |
d68c645b | 3705 | (void) deserialize_dual_timestamp(v, &u->inactive_enter_timestamp); |
8aaf019b | 3706 | continue; |
2791a8f8 | 3707 | } else if (streq(l, "condition-timestamp")) { |
d68c645b | 3708 | (void) deserialize_dual_timestamp(v, &u->condition_timestamp); |
2791a8f8 | 3709 | continue; |
59fccdc5 | 3710 | } else if (streq(l, "assert-timestamp")) { |
d68c645b | 3711 | (void) deserialize_dual_timestamp(v, &u->assert_timestamp); |
59fccdc5 | 3712 | continue; |
2791a8f8 | 3713 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 3714 | |
e911de99 LP |
3715 | r = parse_boolean(v); |
3716 | if (r < 0) | |
f2341e0a | 3717 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 3718 | else |
e911de99 | 3719 | u->condition_result = r; |
efbac6d2 LP |
3720 | |
3721 | continue; | |
c2756a68 | 3722 | |
59fccdc5 | 3723 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 3724 | |
e911de99 LP |
3725 | r = parse_boolean(v); |
3726 | if (r < 0) | |
f2341e0a | 3727 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 3728 | else |
e911de99 | 3729 | u->assert_result = r; |
59fccdc5 LP |
3730 | |
3731 | continue; | |
3732 | ||
c2756a68 | 3733 | } else if (streq(l, "transient")) { |
c2756a68 | 3734 | |
e911de99 LP |
3735 | r = parse_boolean(v); |
3736 | if (r < 0) | |
f2341e0a | 3737 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 3738 | else |
e911de99 | 3739 | u->transient = r; |
c2756a68 LP |
3740 | |
3741 | continue; | |
e911de99 | 3742 | |
0e699122 LP |
3743 | } else if (streq(l, "in-audit")) { |
3744 | ||
3745 | r = parse_boolean(v); | |
3746 | if (r < 0) | |
3747 | log_unit_debug(u, "Failed to parse in-audit bool %s, ignoring.", v); | |
3748 | else | |
3749 | u->in_audit = r; | |
3750 | ||
3751 | continue; | |
3752 | ||
d3070fbd LP |
3753 | } else if (streq(l, "exported-invocation-id")) { |
3754 | ||
3755 | r = parse_boolean(v); | |
3756 | if (r < 0) | |
3757 | log_unit_debug(u, "Failed to parse exported invocation ID bool %s, ignoring.", v); | |
3758 | else | |
3759 | u->exported_invocation_id = r; | |
3760 | ||
3761 | continue; | |
3762 | ||
3763 | } else if (streq(l, "exported-log-level-max")) { | |
3764 | ||
3765 | r = parse_boolean(v); | |
3766 | if (r < 0) | |
3767 | log_unit_debug(u, "Failed to parse exported log level max bool %s, ignoring.", v); | |
3768 | else | |
3769 | u->exported_log_level_max = r; | |
3770 | ||
3771 | continue; | |
3772 | ||
3773 | } else if (streq(l, "exported-log-extra-fields")) { | |
3774 | ||
3775 | r = parse_boolean(v); | |
3776 | if (r < 0) | |
3777 | log_unit_debug(u, "Failed to parse exported log extra fields bool %s, ignoring.", v); | |
3778 | else | |
3779 | u->exported_log_extra_fields = r; | |
3780 | ||
3781 | continue; | |
3782 | ||
90fc172e AZ |
3783 | } else if (streq(l, "exported-log-rate-limit-interval")) { |
3784 | ||
3785 | r = parse_boolean(v); | |
3786 | if (r < 0) | |
3787 | log_unit_debug(u, "Failed to parse exported log rate limit interval %s, ignoring.", v); | |
3788 | else | |
5ac1530e | 3789 | u->exported_log_ratelimit_interval = r; |
90fc172e AZ |
3790 | |
3791 | continue; | |
3792 | ||
3793 | } else if (streq(l, "exported-log-rate-limit-burst")) { | |
3794 | ||
3795 | r = parse_boolean(v); | |
3796 | if (r < 0) | |
3797 | log_unit_debug(u, "Failed to parse exported log rate limit burst %s, ignoring.", v); | |
3798 | else | |
5ac1530e | 3799 | u->exported_log_ratelimit_burst = r; |
90fc172e AZ |
3800 | |
3801 | continue; | |
3802 | ||
fe700f46 | 3803 | } else if (STR_IN_SET(l, "cpu-usage-base", "cpuacct-usage-base")) { |
5ad096b3 | 3804 | |
66ebf6c0 | 3805 | r = safe_atou64(v, &u->cpu_usage_base); |
5ad096b3 | 3806 | if (r < 0) |
fe700f46 LP |
3807 | log_unit_debug(u, "Failed to parse CPU usage base %s, ignoring.", v); |
3808 | ||
3809 | continue; | |
3810 | ||
3811 | } else if (streq(l, "cpu-usage-last")) { | |
3812 | ||
3813 | r = safe_atou64(v, &u->cpu_usage_last); | |
3814 | if (r < 0) | |
3815 | log_unit_debug(u, "Failed to read CPU usage last %s, ignoring.", v); | |
5ad096b3 | 3816 | |
0f908397 | 3817 | continue; |
4e595329 | 3818 | |
afcfaa69 LP |
3819 | } else if (streq(l, "oom-kill-last")) { |
3820 | ||
3821 | r = safe_atou64(v, &u->oom_kill_last); | |
3822 | if (r < 0) | |
3823 | log_unit_debug(u, "Failed to read OOM kill last %s, ignoring.", v); | |
3824 | ||
3825 | continue; | |
3826 | ||
e911de99 | 3827 | } else if (streq(l, "cgroup")) { |
72673e86 | 3828 | |
e911de99 LP |
3829 | r = unit_set_cgroup_path(u, v); |
3830 | if (r < 0) | |
f2341e0a | 3831 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 3832 | |
efdb0237 | 3833 | (void) unit_watch_cgroup(u); |
afcfaa69 | 3834 | (void) unit_watch_cgroup_memory(u); |
efdb0237 | 3835 | |
de1d4f9b WF |
3836 | continue; |
3837 | } else if (streq(l, "cgroup-realized")) { | |
3838 | int b; | |
3839 | ||
3840 | b = parse_boolean(v); | |
3841 | if (b < 0) | |
3842 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
3843 | else | |
3844 | u->cgroup_realized = b; | |
3845 | ||
c2756a68 | 3846 | continue; |
00d9ef85 | 3847 | |
8b108bd0 FB |
3848 | } else if (streq(l, "cgroup-realized-mask")) { |
3849 | ||
3850 | r = cg_mask_from_string(v, &u->cgroup_realized_mask); | |
3851 | if (r < 0) | |
3852 | log_unit_debug(u, "Failed to parse cgroup-realized-mask %s, ignoring.", v); | |
3853 | continue; | |
3854 | ||
3855 | } else if (streq(l, "cgroup-enabled-mask")) { | |
3856 | ||
3857 | r = cg_mask_from_string(v, &u->cgroup_enabled_mask); | |
3858 | if (r < 0) | |
3859 | log_unit_debug(u, "Failed to parse cgroup-enabled-mask %s, ignoring.", v); | |
3860 | continue; | |
3861 | ||
17f14955 | 3862 | } else if (streq(l, "cgroup-invalidated-mask")) { |
906c06f6 | 3863 | |
17f14955 | 3864 | r = cg_mask_from_string(v, &u->cgroup_invalidated_mask); |
906c06f6 | 3865 | if (r < 0) |
17f14955 | 3866 | log_unit_debug(u, "Failed to parse cgroup-invalidated-mask %s, ignoring.", v); |
906c06f6 DM |
3867 | continue; |
3868 | ||
00d9ef85 LP |
3869 | } else if (streq(l, "ref-uid")) { |
3870 | uid_t uid; | |
3871 | ||
3872 | r = parse_uid(v, &uid); | |
3873 | if (r < 0) | |
3874 | log_unit_debug(u, "Failed to parse referenced UID %s, ignoring.", v); | |
3875 | else | |
3876 | unit_ref_uid_gid(u, uid, GID_INVALID); | |
3877 | ||
3878 | continue; | |
3879 | ||
3880 | } else if (streq(l, "ref-gid")) { | |
3881 | gid_t gid; | |
3882 | ||
3883 | r = parse_gid(v, &gid); | |
3884 | if (r < 0) | |
3885 | log_unit_debug(u, "Failed to parse referenced GID %s, ignoring.", v); | |
3886 | else | |
3887 | unit_ref_uid_gid(u, UID_INVALID, gid); | |
3888 | ||
5f616d5f LP |
3889 | continue; |
3890 | ||
05a98afd LP |
3891 | } else if (streq(l, "ref")) { |
3892 | ||
3893 | r = strv_extend(&u->deserialized_refs, v); | |
3894 | if (r < 0) | |
d68c645b | 3895 | return log_oom(); |
05a98afd | 3896 | |
4b58153d LP |
3897 | continue; |
3898 | } else if (streq(l, "invocation-id")) { | |
3899 | sd_id128_t id; | |
3900 | ||
3901 | r = sd_id128_from_string(v, &id); | |
3902 | if (r < 0) | |
3903 | log_unit_debug(u, "Failed to parse invocation id %s, ignoring.", v); | |
3904 | else { | |
3905 | r = unit_set_invocation_id(u, id); | |
3906 | if (r < 0) | |
3907 | log_unit_warning_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
3908 | } | |
3909 | ||
d9e45bc3 MS |
3910 | continue; |
3911 | } else if (streq(l, "freezer-state")) { | |
3912 | FreezerState s; | |
3913 | ||
3914 | s = freezer_state_from_string(v); | |
3915 | if (s < 0) | |
3916 | log_unit_debug(u, "Failed to deserialize freezer-state '%s', ignoring.", v); | |
3917 | else | |
3918 | u->freezer_state = s; | |
3919 | ||
00d9ef85 | 3920 | continue; |
8aaf019b | 3921 | } |
cca098b0 | 3922 | |
6b659ed8 | 3923 | /* Check if this is an IP accounting metric serialization field */ |
83f18c91 LP |
3924 | m = string_table_lookup(ip_accounting_metric_field, ELEMENTSOF(ip_accounting_metric_field), l); |
3925 | if (m >= 0) { | |
6b659ed8 LP |
3926 | uint64_t c; |
3927 | ||
3928 | r = safe_atou64(v, &c); | |
3929 | if (r < 0) | |
3930 | log_unit_debug(u, "Failed to parse IP accounting value %s, ignoring.", v); | |
3931 | else | |
3932 | u->ip_accounting_extra[m] = c; | |
3933 | continue; | |
3934 | } | |
3935 | ||
fbe14fc9 LP |
3936 | m = string_table_lookup(io_accounting_metric_field_base, ELEMENTSOF(io_accounting_metric_field_base), l); |
3937 | if (m >= 0) { | |
3938 | uint64_t c; | |
3939 | ||
3940 | r = safe_atou64(v, &c); | |
3941 | if (r < 0) | |
3942 | log_unit_debug(u, "Failed to parse IO accounting base value %s, ignoring.", v); | |
3943 | else | |
3944 | u->io_accounting_base[m] = c; | |
3945 | continue; | |
3946 | } | |
3947 | ||
3948 | m = string_table_lookup(io_accounting_metric_field_last, ELEMENTSOF(io_accounting_metric_field_last), l); | |
3949 | if (m >= 0) { | |
3950 | uint64_t c; | |
3951 | ||
3952 | r = safe_atou64(v, &c); | |
3953 | if (r < 0) | |
3954 | log_unit_debug(u, "Failed to parse IO accounting last value %s, ignoring.", v); | |
3955 | else | |
3956 | u->io_accounting_last[m] = c; | |
3957 | continue; | |
3958 | } | |
3959 | ||
9bdb98c5 | 3960 | if (unit_can_serialize(u)) { |
e8a565cb YW |
3961 | r = exec_runtime_deserialize_compat(u, l, v, fds); |
3962 | if (r < 0) { | |
3963 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); | |
3964 | continue; | |
9bdb98c5 LP |
3965 | } |
3966 | ||
e8a565cb YW |
3967 | /* Returns positive if key was handled by the call */ |
3968 | if (r > 0) | |
3969 | continue; | |
3970 | ||
9bdb98c5 | 3971 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); |
613b411c | 3972 | if (r < 0) |
f2341e0a | 3973 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 3974 | } |
a16e1123 | 3975 | } |
a483fb59 LP |
3976 | |
3977 | /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is | |
3978 | * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from | |
1f133e0d | 3979 | * before 228 where the base for timeouts was not persistent across reboots. */ |
a483fb59 LP |
3980 | |
3981 | if (!dual_timestamp_is_set(&u->state_change_timestamp)) | |
3982 | dual_timestamp_get(&u->state_change_timestamp); | |
3983 | ||
58d83430 LP |
3984 | /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied |
3985 | * after we are done. For that we invalidate anything already realized, so that we can realize it again. */ | |
3986 | unit_invalidate_cgroup(u, _CGROUP_MASK_ALL); | |
3987 | unit_invalidate_cgroup_bpf(u); | |
3988 | ||
a483fb59 | 3989 | return 0; |
a16e1123 LP |
3990 | } |
3991 | ||
8948b341 LP |
3992 | int unit_deserialize_skip(FILE *f) { |
3993 | int r; | |
07429866 ZJS |
3994 | assert(f); |
3995 | ||
3996 | /* Skip serialized data for this unit. We don't know what it is. */ | |
3997 | ||
3998 | for (;;) { | |
8948b341 LP |
3999 | _cleanup_free_ char *line = NULL; |
4000 | char *l; | |
07429866 | 4001 | |
8948b341 LP |
4002 | r = read_line(f, LONG_LINE_MAX, &line); |
4003 | if (r < 0) | |
4004 | return log_error_errno(r, "Failed to read serialization line: %m"); | |
4005 | if (r == 0) | |
4006 | return 0; | |
07429866 | 4007 | |
07429866 ZJS |
4008 | l = strstrip(line); |
4009 | ||
4010 | /* End marker */ | |
4011 | if (isempty(l)) | |
8948b341 | 4012 | return 1; |
07429866 ZJS |
4013 | } |
4014 | } | |
4015 | ||
d336ba9f | 4016 | int unit_add_node_dependency(Unit *u, const char *what, UnitDependency dep, UnitDependencyMask mask) { |
68eda4bd | 4017 | _cleanup_free_ char *e = NULL; |
44b0d1fd | 4018 | Unit *device; |
6e2ef85b LP |
4019 | int r; |
4020 | ||
4021 | assert(u); | |
4022 | ||
6e2ef85b | 4023 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
4024 | if (isempty(what)) |
4025 | return 0; | |
6e2ef85b | 4026 | |
8407a5d0 | 4027 | if (!is_device_path(what)) |
6e2ef85b LP |
4028 | return 0; |
4029 | ||
44b0d1fd | 4030 | /* When device units aren't supported (such as in a container), don't create dependencies on them. */ |
1c2e9646 | 4031 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
4032 | return 0; |
4033 | ||
7410616c LP |
4034 | r = unit_name_from_path(what, ".device", &e); |
4035 | if (r < 0) | |
4036 | return r; | |
6e2ef85b | 4037 | |
ac155bb8 | 4038 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
4039 | if (r < 0) |
4040 | return r; | |
4041 | ||
ebc8968b FB |
4042 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
4043 | dep = UNIT_BINDS_TO; | |
4044 | ||
d336ba9f FB |
4045 | return unit_add_two_dependencies(u, UNIT_AFTER, |
4046 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, | |
4047 | device, true, mask); | |
6e2ef85b | 4048 | } |
a16e1123 | 4049 | |
44b0d1fd LP |
4050 | int unit_add_blockdev_dependency(Unit *u, const char *what, UnitDependencyMask mask) { |
4051 | _cleanup_free_ char *escaped = NULL, *target = NULL; | |
4052 | int r; | |
4053 | ||
4054 | assert(u); | |
4055 | ||
4056 | if (isempty(what)) | |
4057 | return 0; | |
4058 | ||
4059 | if (!path_startswith(what, "/dev/")) | |
4060 | return 0; | |
4061 | ||
4062 | /* If we don't support devices, then also don't bother with blockdev@.target */ | |
4063 | if (!unit_type_supported(UNIT_DEVICE)) | |
4064 | return 0; | |
4065 | ||
4066 | r = unit_name_path_escape(what, &escaped); | |
4067 | if (r < 0) | |
4068 | return r; | |
4069 | ||
4070 | r = unit_name_build("blockdev", escaped, ".target", &target); | |
4071 | if (r < 0) | |
4072 | return r; | |
4073 | ||
4074 | return unit_add_dependency_by_name(u, UNIT_AFTER, target, true, mask); | |
4075 | } | |
4076 | ||
be847e82 | 4077 | int unit_coldplug(Unit *u) { |
05a98afd LP |
4078 | int r = 0, q; |
4079 | char **i; | |
b49e14d5 | 4080 | Job *uj; |
cca098b0 LP |
4081 | |
4082 | assert(u); | |
4083 | ||
f0831ed2 | 4084 | /* Make sure we don't enter a loop, when coldplugging recursively. */ |
f78f265f LP |
4085 | if (u->coldplugged) |
4086 | return 0; | |
4087 | ||
4088 | u->coldplugged = true; | |
4089 | ||
05a98afd LP |
4090 | STRV_FOREACH(i, u->deserialized_refs) { |
4091 | q = bus_unit_track_add_name(u, *i); | |
4092 | if (q < 0 && r >= 0) | |
4093 | r = q; | |
4094 | } | |
4095 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 4096 | |
05a98afd LP |
4097 | if (UNIT_VTABLE(u)->coldplug) { |
4098 | q = UNIT_VTABLE(u)->coldplug(u); | |
4099 | if (q < 0 && r >= 0) | |
4100 | r = q; | |
4101 | } | |
5a6158b6 | 4102 | |
b49e14d5 | 4103 | uj = u->job ?: u->nop_job; |
4104 | if (uj) { | |
4105 | q = job_coldplug(uj); | |
05a98afd LP |
4106 | if (q < 0 && r >= 0) |
4107 | r = q; | |
4108 | } | |
cca098b0 | 4109 | |
05a98afd | 4110 | return r; |
cca098b0 LP |
4111 | } |
4112 | ||
f0831ed2 LP |
4113 | void unit_catchup(Unit *u) { |
4114 | assert(u); | |
4115 | ||
4116 | if (UNIT_VTABLE(u)->catchup) | |
4117 | UNIT_VTABLE(u)->catchup(u); | |
4118 | } | |
4119 | ||
ba25d39e | 4120 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
4121 | struct stat st; |
4122 | ||
4123 | if (!path) | |
4124 | return false; | |
4125 | ||
77969722 LP |
4126 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
4127 | * are never out-of-date. */ | |
4128 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
4129 | return false; | |
4130 | ||
21b95806 ZJS |
4131 | if (stat(path, &st) < 0) |
4132 | /* What, cannot access this anymore? */ | |
4133 | return true; | |
4134 | ||
ba25d39e ZJS |
4135 | if (path_masked) |
4136 | /* For masked files check if they are still so */ | |
4137 | return !null_or_empty(&st); | |
4138 | else | |
3a8db9fe | 4139 | /* For non-empty files check the mtime */ |
87ec20ef | 4140 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
4141 | |
4142 | return false; | |
4143 | } | |
4144 | ||
45fb0699 | 4145 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
4146 | _cleanup_strv_free_ char **t = NULL; |
4147 | char **path; | |
1b64d026 | 4148 | |
45fb0699 LP |
4149 | assert(u); |
4150 | ||
ba25d39e ZJS |
4151 | /* For unit files, we allow masking… */ |
4152 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
4153 | u->load_state == UNIT_MASKED)) | |
21b95806 | 4154 | return true; |
5f4b19f4 | 4155 | |
ba25d39e ZJS |
4156 | /* Source paths should not be masked… */ |
4157 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 4158 | return true; |
ae7a7182 | 4159 | |
19a44dfe LR |
4160 | if (u->load_state == UNIT_LOADED) |
4161 | (void) unit_find_dropin_paths(u, &t); | |
ab932a62 LP |
4162 | if (!strv_equal(u->dropin_paths, t)) |
4163 | return true; | |
6d10d308 | 4164 | |
ba25d39e | 4165 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 4166 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 4167 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 4168 | return true; |
21b95806 | 4169 | |
ab932a62 | 4170 | return false; |
45fb0699 LP |
4171 | } |
4172 | ||
fdf20a31 | 4173 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
4174 | assert(u); |
4175 | ||
fdf20a31 MM |
4176 | if (UNIT_VTABLE(u)->reset_failed) |
4177 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 | 4178 | |
7bf081a1 | 4179 | ratelimit_reset(&u->start_ratelimit); |
6bf0f408 | 4180 | u->start_limit_hit = false; |
5632e374 LP |
4181 | } |
4182 | ||
a7f241db LP |
4183 | Unit *unit_following(Unit *u) { |
4184 | assert(u); | |
4185 | ||
4186 | if (UNIT_VTABLE(u)->following) | |
4187 | return UNIT_VTABLE(u)->following(u); | |
4188 | ||
4189 | return NULL; | |
4190 | } | |
4191 | ||
31afa0a4 | 4192 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
4193 | assert(u); |
4194 | ||
31afa0a4 LP |
4195 | /* This call does check the current state of the unit. It's |
4196 | * hence useful to be called from state change calls of the | |
4197 | * unit itself, where the state isn't updated yet. This is | |
4198 | * different from unit_inactive_or_pending() which checks both | |
4199 | * the current state and for a queued job. */ | |
18ffdfda | 4200 | |
28a2dfe8 | 4201 | return unit_has_job_type(u, JOB_STOP); |
31afa0a4 LP |
4202 | } |
4203 | ||
4204 | bool unit_inactive_or_pending(Unit *u) { | |
4205 | assert(u); | |
4206 | ||
4207 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 4208 | |
d956ac29 LP |
4209 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
4210 | return true; | |
4211 | ||
31afa0a4 | 4212 | if (unit_stop_pending(u)) |
18ffdfda LP |
4213 | return true; |
4214 | ||
4215 | return false; | |
4216 | } | |
4217 | ||
31afa0a4 | 4218 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
4219 | assert(u); |
4220 | ||
f60c2665 | 4221 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
4222 | |
4223 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
4224 | return true; | |
4225 | ||
ac155bb8 | 4226 | if (u->job && |
3742095b | 4227 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
4228 | return true; |
4229 | ||
4230 | return false; | |
4231 | } | |
4232 | ||
52a12341 YW |
4233 | bool unit_will_restart_default(Unit *u) { |
4234 | assert(u); | |
4235 | ||
28a2dfe8 | 4236 | return unit_has_job_type(u, JOB_START); |
52a12341 YW |
4237 | } |
4238 | ||
deb4e708 MK |
4239 | bool unit_will_restart(Unit *u) { |
4240 | assert(u); | |
4241 | ||
4242 | if (!UNIT_VTABLE(u)->will_restart) | |
4243 | return false; | |
4244 | ||
4245 | return UNIT_VTABLE(u)->will_restart(u); | |
4246 | } | |
4247 | ||
718db961 | 4248 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
4249 | assert(u); |
4250 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 4251 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 4252 | |
8a0867d6 | 4253 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 4254 | return -EOPNOTSUPP; |
8a0867d6 | 4255 | |
c74f17d9 | 4256 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
4257 | } |
4258 | ||
82659fd7 | 4259 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
af4fa99d | 4260 | _cleanup_set_free_ Set *pid_set = NULL; |
82659fd7 LP |
4261 | int r; |
4262 | ||
d5099efc | 4263 | pid_set = set_new(NULL); |
82659fd7 LP |
4264 | if (!pid_set) |
4265 | return NULL; | |
4266 | ||
4267 | /* Exclude the main/control pids from being killed via the cgroup */ | |
4268 | if (main_pid > 0) { | |
fea72cc0 | 4269 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 | 4270 | if (r < 0) |
95f14a3e | 4271 | return NULL; |
82659fd7 LP |
4272 | } |
4273 | ||
4274 | if (control_pid > 0) { | |
fea72cc0 | 4275 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 | 4276 | if (r < 0) |
95f14a3e | 4277 | return NULL; |
82659fd7 LP |
4278 | } |
4279 | ||
95f14a3e | 4280 | return TAKE_PTR(pid_set); |
82659fd7 LP |
4281 | } |
4282 | ||
d91c34f2 LP |
4283 | int unit_kill_common( |
4284 | Unit *u, | |
4285 | KillWho who, | |
4286 | int signo, | |
4287 | pid_t main_pid, | |
4288 | pid_t control_pid, | |
718db961 | 4289 | sd_bus_error *error) { |
d91c34f2 | 4290 | |
814cc562 | 4291 | int r = 0; |
ac5e3a50 | 4292 | bool killed = false; |
814cc562 | 4293 | |
ac5e3a50 | 4294 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 4295 | if (main_pid < 0) |
7358dc02 | 4296 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 4297 | else if (main_pid == 0) |
7358dc02 | 4298 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
4299 | } |
4300 | ||
ac5e3a50 | 4301 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 4302 | if (control_pid < 0) |
7358dc02 | 4303 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 4304 | else if (control_pid == 0) |
7358dc02 | 4305 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
4306 | } |
4307 | ||
ac5e3a50 JS |
4308 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
4309 | if (control_pid > 0) { | |
814cc562 MS |
4310 | if (kill(control_pid, signo) < 0) |
4311 | r = -errno; | |
ac5e3a50 JS |
4312 | else |
4313 | killed = true; | |
4314 | } | |
814cc562 | 4315 | |
ac5e3a50 JS |
4316 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
4317 | if (main_pid > 0) { | |
814cc562 MS |
4318 | if (kill(main_pid, signo) < 0) |
4319 | r = -errno; | |
ac5e3a50 JS |
4320 | else |
4321 | killed = true; | |
4322 | } | |
814cc562 | 4323 | |
ac5e3a50 | 4324 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
4325 | _cleanup_set_free_ Set *pid_set = NULL; |
4326 | int q; | |
4327 | ||
82659fd7 LP |
4328 | /* Exclude the main/control pids from being killed via the cgroup */ |
4329 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
4330 | if (!pid_set) |
4331 | return -ENOMEM; | |
4332 | ||
1d98fef1 | 4333 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, NULL, NULL); |
4c701096 | 4334 | if (q < 0 && !IN_SET(q, -EAGAIN, -ESRCH, -ENOENT)) |
814cc562 | 4335 | r = q; |
ac5e3a50 JS |
4336 | else |
4337 | killed = true; | |
814cc562 MS |
4338 | } |
4339 | ||
201f0c91 | 4340 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL)) |
ac5e3a50 JS |
4341 | return -ESRCH; |
4342 | ||
814cc562 MS |
4343 | return r; |
4344 | } | |
4345 | ||
6210e7fc LP |
4346 | int unit_following_set(Unit *u, Set **s) { |
4347 | assert(u); | |
4348 | assert(s); | |
4349 | ||
4350 | if (UNIT_VTABLE(u)->following_set) | |
4351 | return UNIT_VTABLE(u)->following_set(u, s); | |
4352 | ||
4353 | *s = NULL; | |
4354 | return 0; | |
4355 | } | |
4356 | ||
a4375746 | 4357 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
4358 | int r; |
4359 | ||
a4375746 LP |
4360 | assert(u); |
4361 | ||
0ec0deaa LP |
4362 | if (u->unit_file_state < 0 && u->fragment_path) { |
4363 | r = unit_file_get_state( | |
463d0d15 | 4364 | u->manager->unit_file_scope, |
0ec0deaa | 4365 | NULL, |
9ea3a0e7 | 4366 | u->id, |
0ec0deaa LP |
4367 | &u->unit_file_state); |
4368 | if (r < 0) | |
4369 | u->unit_file_state = UNIT_FILE_BAD; | |
4370 | } | |
a4375746 | 4371 | |
ac155bb8 | 4372 | return u->unit_file_state; |
a4375746 LP |
4373 | } |
4374 | ||
d2dc52db LP |
4375 | int unit_get_unit_file_preset(Unit *u) { |
4376 | assert(u); | |
4377 | ||
4378 | if (u->unit_file_preset < 0 && u->fragment_path) | |
4379 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 4380 | u->manager->unit_file_scope, |
0ec0deaa | 4381 | NULL, |
8f7b2566 ZJS |
4382 | basename(u->fragment_path), |
4383 | NULL); | |
d2dc52db LP |
4384 | |
4385 | return u->unit_file_preset; | |
4386 | } | |
4387 | ||
7f7d01ed | 4388 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 4389 | assert(ref); |
7f7d01ed ZJS |
4390 | assert(source); |
4391 | assert(target); | |
57020a3a | 4392 | |
7f7d01ed | 4393 | if (ref->target) |
57020a3a LP |
4394 | unit_ref_unset(ref); |
4395 | ||
7f7d01ed ZJS |
4396 | ref->source = source; |
4397 | ref->target = target; | |
4398 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
4399 | return target; | |
57020a3a LP |
4400 | } |
4401 | ||
4402 | void unit_ref_unset(UnitRef *ref) { | |
4403 | assert(ref); | |
4404 | ||
7f7d01ed | 4405 | if (!ref->target) |
57020a3a LP |
4406 | return; |
4407 | ||
b75102e5 LP |
4408 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
4409 | * be unreferenced now. */ | |
7f7d01ed | 4410 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 4411 | |
7f7d01ed ZJS |
4412 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
4413 | ref->source = ref->target = NULL; | |
57020a3a LP |
4414 | } |
4415 | ||
29206d46 LP |
4416 | static int user_from_unit_name(Unit *u, char **ret) { |
4417 | ||
4418 | static const uint8_t hash_key[] = { | |
4419 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
4420 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
4421 | }; | |
4422 | ||
4423 | _cleanup_free_ char *n = NULL; | |
4424 | int r; | |
4425 | ||
4426 | r = unit_name_to_prefix(u->id, &n); | |
4427 | if (r < 0) | |
4428 | return r; | |
4429 | ||
7a8867ab | 4430 | if (valid_user_group_name(n, 0)) { |
ae2a15bc | 4431 | *ret = TAKE_PTR(n); |
29206d46 LP |
4432 | return 0; |
4433 | } | |
4434 | ||
4435 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
4436 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
4437 | return -ENOMEM; | |
4438 | ||
4439 | return 0; | |
4440 | } | |
4441 | ||
598459ce LP |
4442 | int unit_patch_contexts(Unit *u) { |
4443 | CGroupContext *cc; | |
4444 | ExecContext *ec; | |
cba6e062 LP |
4445 | unsigned i; |
4446 | int r; | |
4447 | ||
e06c73cc | 4448 | assert(u); |
e06c73cc | 4449 | |
598459ce LP |
4450 | /* Patch in the manager defaults into the exec and cgroup |
4451 | * contexts, _after_ the rest of the settings have been | |
4452 | * initialized */ | |
085afe36 | 4453 | |
598459ce LP |
4454 | ec = unit_get_exec_context(u); |
4455 | if (ec) { | |
4456 | /* This only copies in the ones that need memory */ | |
4457 | for (i = 0; i < _RLIMIT_MAX; i++) | |
4458 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
4459 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
4460 | if (!ec->rlimit[i]) | |
4461 | return -ENOMEM; | |
4462 | } | |
4463 | ||
463d0d15 | 4464 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4465 | !ec->working_directory) { |
4466 | ||
4467 | r = get_home_dir(&ec->working_directory); | |
4468 | if (r < 0) | |
4469 | return r; | |
4c08c824 LP |
4470 | |
4471 | /* Allow user services to run, even if the | |
4472 | * home directory is missing */ | |
4473 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4474 | } |
4475 | ||
598459ce | 4476 | if (ec->private_devices) |
2cd0a735 | 4477 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4478 | |
4479 | if (ec->protect_kernel_modules) | |
4480 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 | 4481 | |
84703040 KK |
4482 | if (ec->protect_kernel_logs) |
4483 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYSLOG); | |
4484 | ||
fc64760d KK |
4485 | if (ec->protect_clock) |
4486 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_SYS_TIME) | (UINT64_C(1) << CAP_WAKE_ALARM)); | |
4487 | ||
29206d46 LP |
4488 | if (ec->dynamic_user) { |
4489 | if (!ec->user) { | |
4490 | r = user_from_unit_name(u, &ec->user); | |
4491 | if (r < 0) | |
4492 | return r; | |
4493 | } | |
4494 | ||
4495 | if (!ec->group) { | |
4496 | ec->group = strdup(ec->user); | |
4497 | if (!ec->group) | |
4498 | return -ENOMEM; | |
4499 | } | |
4500 | ||
bf65b7e0 LP |
4501 | /* If the dynamic user option is on, let's make sure that the unit can't leave its |
4502 | * UID/GID around in the file system or on IPC objects. Hence enforce a strict | |
4503 | * sandbox. */ | |
63bb64a0 | 4504 | |
29206d46 | 4505 | ec->private_tmp = true; |
00d9ef85 | 4506 | ec->remove_ipc = true; |
63bb64a0 LP |
4507 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4508 | if (ec->protect_home == PROTECT_HOME_NO) | |
4509 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
bf65b7e0 LP |
4510 | |
4511 | /* Make sure this service can neither benefit from SUID/SGID binaries nor create | |
4512 | * them. */ | |
4513 | ec->no_new_privileges = true; | |
4514 | ec->restrict_suid_sgid = true; | |
29206d46 | 4515 | } |
cba6e062 LP |
4516 | } |
4517 | ||
598459ce | 4518 | cc = unit_get_cgroup_context(u); |
fe65e88b | 4519 | if (cc && ec) { |
f513e420 | 4520 | |
fe65e88b | 4521 | if (ec->private_devices && |
084870f9 ZJS |
4522 | cc->device_policy == CGROUP_DEVICE_POLICY_AUTO) |
4523 | cc->device_policy = CGROUP_DEVICE_POLICY_CLOSED; | |
fe65e88b YW |
4524 | |
4525 | if (ec->root_image && | |
084870f9 | 4526 | (cc->device_policy != CGROUP_DEVICE_POLICY_AUTO || cc->device_allow)) { |
fe65e88b YW |
4527 | |
4528 | /* When RootImage= is specified, the following devices are touched. */ | |
4529 | r = cgroup_add_device_allow(cc, "/dev/loop-control", "rw"); | |
4530 | if (r < 0) | |
4531 | return r; | |
4532 | ||
4533 | r = cgroup_add_device_allow(cc, "block-loop", "rwm"); | |
4534 | if (r < 0) | |
4535 | return r; | |
4536 | ||
4537 | r = cgroup_add_device_allow(cc, "block-blkext", "rwm"); | |
4538 | if (r < 0) | |
4539 | return r; | |
867af728 LP |
4540 | |
4541 | /* Make sure "block-loop" can be resolved, i.e. make sure "loop" shows up in /proc/devices */ | |
4542 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "modprobe@loop.service", true, UNIT_DEPENDENCY_FILE); | |
4543 | if (r < 0) | |
4544 | return r; | |
fe65e88b | 4545 | } |
fc64760d KK |
4546 | |
4547 | if (ec->protect_clock) { | |
4548 | r = cgroup_add_device_allow(cc, "char-rtc", "r"); | |
4549 | if (r < 0) | |
4550 | return r; | |
4551 | } | |
598459ce | 4552 | } |
f1660f96 | 4553 | |
cba6e062 | 4554 | return 0; |
e06c73cc LP |
4555 | } |
4556 | ||
3ef63c31 LP |
4557 | ExecContext *unit_get_exec_context(Unit *u) { |
4558 | size_t offset; | |
4559 | assert(u); | |
4560 | ||
598459ce LP |
4561 | if (u->type < 0) |
4562 | return NULL; | |
4563 | ||
3ef63c31 LP |
4564 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4565 | if (offset <= 0) | |
4566 | return NULL; | |
4567 | ||
4568 | return (ExecContext*) ((uint8_t*) u + offset); | |
4569 | } | |
4570 | ||
718db961 LP |
4571 | KillContext *unit_get_kill_context(Unit *u) { |
4572 | size_t offset; | |
4573 | assert(u); | |
4574 | ||
598459ce LP |
4575 | if (u->type < 0) |
4576 | return NULL; | |
4577 | ||
718db961 LP |
4578 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4579 | if (offset <= 0) | |
4580 | return NULL; | |
4581 | ||
4582 | return (KillContext*) ((uint8_t*) u + offset); | |
4583 | } | |
4584 | ||
4ad49000 LP |
4585 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4586 | size_t offset; | |
4587 | ||
598459ce LP |
4588 | if (u->type < 0) |
4589 | return NULL; | |
4590 | ||
4ad49000 LP |
4591 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4592 | if (offset <= 0) | |
4593 | return NULL; | |
4594 | ||
4595 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4596 | } | |
4597 | ||
613b411c LP |
4598 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4599 | size_t offset; | |
4600 | ||
598459ce LP |
4601 | if (u->type < 0) |
4602 | return NULL; | |
4603 | ||
613b411c LP |
4604 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4605 | if (offset <= 0) | |
4606 | return NULL; | |
4607 | ||
4608 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4609 | } | |
4610 | ||
2e59b241 | 4611 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4612 | assert(u); |
4613 | ||
2e59b241 | 4614 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4615 | return NULL; |
4616 | ||
39591351 LP |
4617 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4618 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4619 | |
2e59b241 | 4620 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4621 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4622 | |
2e59b241 LP |
4623 | if (flags & UNIT_RUNTIME) |
4624 | return u->manager->lookup_paths.runtime_control; | |
4625 | ||
39591351 | 4626 | return NULL; |
71645aca LP |
4627 | } |
4628 | ||
2e59b241 LP |
4629 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4630 | char *ret = NULL; | |
4631 | ||
4632 | if (!s) | |
4633 | return NULL; | |
4634 | ||
4635 | /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated | |
4636 | * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is | |
4637 | * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly | |
4638 | * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is | |
4639 | * not specified, then the return value always needs to be freed. Callers can use this to optimize memory | |
4640 | * allocations. */ | |
4641 | ||
4642 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
4643 | ret = specifier_escape(s); | |
4644 | if (!ret) | |
4645 | return NULL; | |
4646 | ||
4647 | s = ret; | |
4648 | } | |
4649 | ||
4650 | if (flags & UNIT_ESCAPE_C) { | |
4651 | char *a; | |
4652 | ||
4653 | a = cescape(s); | |
4654 | free(ret); | |
4655 | if (!a) | |
4656 | return NULL; | |
4657 | ||
4658 | ret = a; | |
4659 | } | |
4660 | ||
4661 | if (buf) { | |
4662 | *buf = ret; | |
4663 | return ret ?: (char*) s; | |
4664 | } | |
4665 | ||
4666 | return ret ?: strdup(s); | |
4667 | } | |
4668 | ||
4669 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4670 | _cleanup_free_ char *result = NULL; | |
4671 | size_t n = 0, allocated = 0; | |
ae2a15bc | 4672 | char **i; |
2e59b241 LP |
4673 | |
4674 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a | |
4675 | * way suitable for ExecStart= stanzas */ | |
4676 | ||
4677 | STRV_FOREACH(i, l) { | |
4678 | _cleanup_free_ char *buf = NULL; | |
4679 | const char *p; | |
4680 | size_t a; | |
4681 | char *q; | |
4682 | ||
4683 | p = unit_escape_setting(*i, flags, &buf); | |
4684 | if (!p) | |
4685 | return NULL; | |
4686 | ||
4687 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
4688 | if (!GREEDY_REALLOC(result, allocated, n + a + 1)) | |
4689 | return NULL; | |
4690 | ||
4691 | q = result + n; | |
4692 | if (n > 0) | |
4693 | *(q++) = ' '; | |
4694 | ||
4695 | *(q++) = '"'; | |
4696 | q = stpcpy(q, p); | |
4697 | *(q++) = '"'; | |
4698 | ||
4699 | n += a; | |
4700 | } | |
4701 | ||
4702 | if (!GREEDY_REALLOC(result, allocated, n + 1)) | |
4703 | return NULL; | |
4704 | ||
4705 | result[n] = 0; | |
4706 | ||
ae2a15bc | 4707 | return TAKE_PTR(result); |
2e59b241 LP |
4708 | } |
4709 | ||
4710 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4711 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4712 | const char *dir, *wrapped; |
26d04f86 | 4713 | int r; |
71645aca LP |
4714 | |
4715 | assert(u); | |
2e59b241 LP |
4716 | assert(name); |
4717 | assert(data); | |
4718 | ||
4719 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4720 | return 0; | |
4721 | ||
4722 | data = unit_escape_setting(data, flags, &escaped); | |
4723 | if (!data) | |
4724 | return -ENOMEM; | |
4725 | ||
4726 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4727 | * previous section header is the same */ | |
4728 | ||
4729 | if (flags & UNIT_PRIVATE) { | |
4730 | if (!UNIT_VTABLE(u)->private_section) | |
4731 | return -EINVAL; | |
4732 | ||
4733 | if (!u->transient_file || u->last_section_private < 0) | |
4734 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4735 | else if (u->last_section_private == 0) | |
4736 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4737 | } else { | |
4738 | if (!u->transient_file || u->last_section_private < 0) | |
4739 | data = strjoina("[Unit]\n", data); | |
4740 | else if (u->last_section_private > 0) | |
4741 | data = strjoina("\n[Unit]\n", data); | |
4742 | } | |
71645aca | 4743 | |
4f4afc88 LP |
4744 | if (u->transient_file) { |
4745 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4746 | * write to the transient unit file. */ | |
4747 | fputs(data, u->transient_file); | |
4f4afc88 | 4748 | |
2e59b241 LP |
4749 | if (!endswith(data, "\n")) |
4750 | fputc('\n', u->transient_file); | |
4751 | ||
4752 | /* Remember which section we wrote this entry to */ | |
4753 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4754 | return 0; |
2e59b241 | 4755 | } |
8e2af478 | 4756 | |
2e59b241 | 4757 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4758 | if (!dir) |
4759 | return -EINVAL; | |
71645aca | 4760 | |
2a9a6f8a | 4761 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4762 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4763 | data, |
4764 | "\n"); | |
e20b2a86 | 4765 | |
815b09d3 | 4766 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4767 | if (r < 0) |
4768 | return r; | |
4769 | ||
45639f1b | 4770 | (void) mkdir_p_label(p, 0755); |
4dba44a5 ZJS |
4771 | |
4772 | /* Make sure the drop-in dir is registered in our path cache. This way we don't need to stupidly | |
4773 | * recreate the cache after every drop-in we write. */ | |
4774 | if (u->manager->unit_path_cache) { | |
be327321 | 4775 | r = set_put_strdup(&u->manager->unit_path_cache, p); |
4dba44a5 ZJS |
4776 | if (r < 0) |
4777 | return r; | |
4778 | } | |
4779 | ||
2a9a6f8a | 4780 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4781 | if (r < 0) |
4782 | return r; | |
4783 | ||
815b09d3 | 4784 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4785 | if (r < 0) |
4786 | return r; | |
815b09d3 | 4787 | q = NULL; |
adb76a70 | 4788 | |
adb76a70 WC |
4789 | strv_uniq(u->dropin_paths); |
4790 | ||
4791 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4792 | ||
4793 | return 0; | |
26d04f86 | 4794 | } |
71645aca | 4795 | |
2e59b241 | 4796 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4797 | _cleanup_free_ char *p = NULL; |
4798 | va_list ap; | |
4799 | int r; | |
4800 | ||
4801 | assert(u); | |
4802 | assert(name); | |
4803 | assert(format); | |
4804 | ||
2e59b241 | 4805 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4806 | return 0; |
4807 | ||
4808 | va_start(ap, format); | |
4809 | r = vasprintf(&p, format, ap); | |
4810 | va_end(ap); | |
4811 | ||
4812 | if (r < 0) | |
4813 | return -ENOMEM; | |
4814 | ||
2e59b241 | 4815 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4816 | } |
71645aca | 4817 | |
c2756a68 | 4818 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4819 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4820 | FILE *f; |
4f4afc88 | 4821 | |
c2756a68 LP |
4822 | assert(u); |
4823 | ||
3f5e8115 LP |
4824 | if (!UNIT_VTABLE(u)->can_transient) |
4825 | return -EOPNOTSUPP; | |
4826 | ||
45639f1b LP |
4827 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4828 | ||
657ee2d8 | 4829 | path = path_join(u->manager->lookup_paths.transient, u->id); |
4f4afc88 LP |
4830 | if (!path) |
4831 | return -ENOMEM; | |
4832 | ||
4833 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4834 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4835 | ||
78e334b5 | 4836 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 4837 | f = fopen(path, "we"); |
0126c8f3 | 4838 | if (!f) |
78e334b5 | 4839 | return -errno; |
4f4afc88 LP |
4840 | } |
4841 | ||
0126c8f3 | 4842 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4843 | u->transient_file = f; |
4844 | ||
0126c8f3 | 4845 | free_and_replace(u->fragment_path, path); |
7c65093a | 4846 | |
7c65093a LP |
4847 | u->source_path = mfree(u->source_path); |
4848 | u->dropin_paths = strv_free(u->dropin_paths); | |
4849 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4850 | ||
4f4afc88 LP |
4851 | u->load_state = UNIT_STUB; |
4852 | u->load_error = 0; | |
4853 | u->transient = true; | |
4854 | ||
7c65093a LP |
4855 | unit_add_to_dbus_queue(u); |
4856 | unit_add_to_gc_queue(u); | |
c2756a68 | 4857 | |
4f4afc88 LP |
4858 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4859 | u->transient_file); | |
4860 | ||
3f5e8115 | 4861 | return 0; |
c2756a68 LP |
4862 | } |
4863 | ||
c53d2d54 | 4864 | static int log_kill(pid_t pid, int sig, void *userdata) { |
1d98fef1 LP |
4865 | _cleanup_free_ char *comm = NULL; |
4866 | ||
4867 | (void) get_process_comm(pid, &comm); | |
4868 | ||
4869 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4870 | only, like for example systemd's own PAM stub process. */ | |
4871 | if (comm && comm[0] == '(') | |
c53d2d54 | 4872 | return 0; |
1d98fef1 LP |
4873 | |
4874 | log_unit_notice(userdata, | |
4875 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4876 | pid, | |
4877 | strna(comm), | |
4878 | signal_to_string(sig)); | |
c53d2d54 DB |
4879 | |
4880 | return 1; | |
1d98fef1 LP |
4881 | } |
4882 | ||
4ab1670f | 4883 | static int operation_to_signal(const KillContext *c, KillOperation k, bool *noteworthy) { |
1d98fef1 LP |
4884 | assert(c); |
4885 | ||
4886 | switch (k) { | |
4887 | ||
4888 | case KILL_TERMINATE: | |
4889 | case KILL_TERMINATE_AND_LOG: | |
4ab1670f | 4890 | *noteworthy = false; |
1d98fef1 LP |
4891 | return c->kill_signal; |
4892 | ||
a232ebcc | 4893 | case KILL_RESTART: |
4ab1670f | 4894 | *noteworthy = false; |
a232ebcc ZJS |
4895 | return restart_kill_signal(c); |
4896 | ||
1d98fef1 | 4897 | case KILL_KILL: |
4ab1670f | 4898 | *noteworthy = true; |
fbb48d4c | 4899 | return c->final_kill_signal; |
1d98fef1 | 4900 | |
c87700a1 | 4901 | case KILL_WATCHDOG: |
4ab1670f | 4902 | *noteworthy = true; |
c87700a1 | 4903 | return c->watchdog_signal; |
1d98fef1 LP |
4904 | |
4905 | default: | |
4906 | assert_not_reached("KillOperation unknown"); | |
4907 | } | |
4908 | } | |
4909 | ||
cd2086fe LP |
4910 | int unit_kill_context( |
4911 | Unit *u, | |
4912 | KillContext *c, | |
db2cb23b | 4913 | KillOperation k, |
cd2086fe LP |
4914 | pid_t main_pid, |
4915 | pid_t control_pid, | |
4916 | bool main_pid_alien) { | |
4917 | ||
1d98fef1 | 4918 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4919 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4920 | int sig, r; |
cd2086fe LP |
4921 | |
4922 | assert(u); | |
4923 | assert(c); | |
4924 | ||
59ec09a8 ZJS |
4925 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. |
4926 | * Returns > 0 if we killed something worth waiting for, 0 otherwise. */ | |
1d98fef1 | 4927 | |
cd2086fe LP |
4928 | if (c->kill_mode == KILL_NONE) |
4929 | return 0; | |
4930 | ||
4ab1670f ZJS |
4931 | bool noteworthy; |
4932 | sig = operation_to_signal(c, k, ¬eworthy); | |
4933 | if (noteworthy) | |
4934 | log_func = log_kill; | |
1d98fef1 LP |
4935 | |
4936 | send_sighup = | |
4937 | c->send_sighup && | |
4938 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4939 | sig != SIGHUP; | |
4940 | ||
cd2086fe | 4941 | if (main_pid > 0) { |
1d98fef1 LP |
4942 | if (log_func) |
4943 | log_func(main_pid, sig, u); | |
cd2086fe | 4944 | |
1d98fef1 | 4945 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4946 | if (r < 0 && r != -ESRCH) { |
4947 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4948 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 4949 | |
b821a397 | 4950 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 4951 | } else { |
bc6aed7b LP |
4952 | if (!main_pid_alien) |
4953 | wait_for_exit = true; | |
82659fd7 | 4954 | |
1d98fef1 | 4955 | if (r != -ESRCH && send_sighup) |
d0667321 | 4956 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 4957 | } |
cd2086fe LP |
4958 | } |
4959 | ||
4960 | if (control_pid > 0) { | |
1d98fef1 LP |
4961 | if (log_func) |
4962 | log_func(control_pid, sig, u); | |
cd2086fe | 4963 | |
1d98fef1 | 4964 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4965 | if (r < 0 && r != -ESRCH) { |
4966 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4967 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 4968 | |
b821a397 | 4969 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 4970 | } else { |
cd2086fe | 4971 | wait_for_exit = true; |
82659fd7 | 4972 | |
1d98fef1 | 4973 | if (r != -ESRCH && send_sighup) |
d0667321 | 4974 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 4975 | } |
cd2086fe LP |
4976 | } |
4977 | ||
b821a397 LP |
4978 | if (u->cgroup_path && |
4979 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4980 | _cleanup_set_free_ Set *pid_set = NULL; |
4981 | ||
82659fd7 LP |
4982 | /* Exclude the main/control pids from being killed via the cgroup */ |
4983 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4984 | if (!pid_set) |
4985 | return -ENOMEM; | |
4986 | ||
1d98fef1 LP |
4987 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4988 | sig, | |
4989 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4990 | pid_set, | |
4991 | log_func, u); | |
cd2086fe | 4992 | if (r < 0) { |
4c701096 | 4993 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
b821a397 LP |
4994 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
4995 | ||
82659fd7 | 4996 | } else if (r > 0) { |
bc6aed7b | 4997 | |
1d9cc876 LP |
4998 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4999 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
5000 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
5001 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
5002 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
5003 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 5004 | |
c22800e4 | 5005 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 5006 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 5007 | wait_for_exit = true; |
58ea275a | 5008 | |
1d98fef1 | 5009 | if (send_sighup) { |
82659fd7 LP |
5010 | set_free(pid_set); |
5011 | ||
5012 | pid_set = unit_pid_set(main_pid, control_pid); | |
5013 | if (!pid_set) | |
5014 | return -ENOMEM; | |
5015 | ||
c8aa4b5b LP |
5016 | (void) cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
5017 | SIGHUP, | |
5018 | CGROUP_IGNORE_SELF, | |
5019 | pid_set, | |
5020 | NULL, NULL); | |
82659fd7 LP |
5021 | } |
5022 | } | |
cd2086fe LP |
5023 | } |
5024 | ||
5025 | return wait_for_exit; | |
5026 | } | |
5027 | ||
eef85c4a | 5028 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
ca8700e9 | 5029 | _cleanup_free_ char *p = NULL; |
eef85c4a | 5030 | UnitDependencyInfo di; |
a57f7e2c LP |
5031 | int r; |
5032 | ||
5033 | assert(u); | |
5034 | assert(path); | |
5035 | ||
eef85c4a LP |
5036 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in |
5037 | * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to | |
5038 | * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily | |
5039 | * determine which units to make themselves a dependency of. */ | |
a57f7e2c | 5040 | |
70b64bd3 ZJS |
5041 | if (!path_is_absolute(path)) |
5042 | return -EINVAL; | |
5043 | ||
548f6937 | 5044 | r = hashmap_ensure_allocated(&u->requires_mounts_for, &path_hash_ops); |
eef85c4a LP |
5045 | if (r < 0) |
5046 | return r; | |
5047 | ||
a57f7e2c LP |
5048 | p = strdup(path); |
5049 | if (!p) | |
5050 | return -ENOMEM; | |
5051 | ||
106bf8e4 | 5052 | path = path_simplify(p, true); |
a57f7e2c | 5053 | |
ca8700e9 | 5054 | if (!path_is_normalized(path)) |
a57f7e2c | 5055 | return -EPERM; |
a57f7e2c | 5056 | |
ca8700e9 | 5057 | if (hashmap_contains(u->requires_mounts_for, path)) |
a57f7e2c | 5058 | return 0; |
a57f7e2c | 5059 | |
eef85c4a LP |
5060 | di = (UnitDependencyInfo) { |
5061 | .origin_mask = mask | |
5062 | }; | |
5063 | ||
ca8700e9 ZJS |
5064 | r = hashmap_put(u->requires_mounts_for, path, di.data); |
5065 | if (r < 0) | |
a57f7e2c | 5066 | return r; |
ca8700e9 | 5067 | p = NULL; |
a57f7e2c | 5068 | |
4cb06c59 | 5069 | char prefix[strlen(path) + 1]; |
ca8700e9 | 5070 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
a57f7e2c LP |
5071 | Set *x; |
5072 | ||
5073 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
5074 | if (!x) { | |
ca8700e9 | 5075 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 5076 | |
548f6937 | 5077 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
742f41ad LP |
5078 | if (r < 0) |
5079 | return r; | |
a57f7e2c LP |
5080 | |
5081 | q = strdup(prefix); | |
5082 | if (!q) | |
5083 | return -ENOMEM; | |
5084 | ||
d5099efc | 5085 | x = set_new(NULL); |
ca8700e9 | 5086 | if (!x) |
a57f7e2c | 5087 | return -ENOMEM; |
a57f7e2c LP |
5088 | |
5089 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
5090 | if (r < 0) { | |
a57f7e2c LP |
5091 | set_free(x); |
5092 | return r; | |
5093 | } | |
ca8700e9 | 5094 | q = NULL; |
a57f7e2c LP |
5095 | } |
5096 | ||
5097 | r = set_put(x, u); | |
5098 | if (r < 0) | |
5099 | return r; | |
5100 | } | |
5101 | ||
5102 | return 0; | |
5103 | } | |
5104 | ||
613b411c LP |
5105 | int unit_setup_exec_runtime(Unit *u) { |
5106 | ExecRuntime **rt; | |
5107 | size_t offset; | |
613b411c | 5108 | Unit *other; |
eef85c4a LP |
5109 | Iterator i; |
5110 | void *v; | |
e8a565cb | 5111 | int r; |
613b411c LP |
5112 | |
5113 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
5114 | assert(offset > 0); | |
5115 | ||
06b643e7 | 5116 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
5117 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
5118 | if (*rt) | |
5119 | return 0; | |
5120 | ||
5121 | /* Try to get it from somebody else */ | |
eef85c4a | 5122 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { |
e8a565cb YW |
5123 | r = exec_runtime_acquire(u->manager, NULL, other->id, false, rt); |
5124 | if (r == 1) | |
5125 | return 1; | |
613b411c LP |
5126 | } |
5127 | ||
e8a565cb | 5128 | return exec_runtime_acquire(u->manager, unit_get_exec_context(u), u->id, true, rt); |
613b411c LP |
5129 | } |
5130 | ||
29206d46 LP |
5131 | int unit_setup_dynamic_creds(Unit *u) { |
5132 | ExecContext *ec; | |
5133 | DynamicCreds *dcreds; | |
5134 | size_t offset; | |
5135 | ||
5136 | assert(u); | |
5137 | ||
5138 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
5139 | assert(offset > 0); | |
5140 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
5141 | ||
5142 | ec = unit_get_exec_context(u); | |
5143 | assert(ec); | |
5144 | ||
5145 | if (!ec->dynamic_user) | |
5146 | return 0; | |
5147 | ||
5148 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
5149 | } | |
5150 | ||
1c2e9646 LP |
5151 | bool unit_type_supported(UnitType t) { |
5152 | if (_unlikely_(t < 0)) | |
5153 | return false; | |
5154 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
5155 | return false; | |
5156 | ||
5157 | if (!unit_vtable[t]->supported) | |
5158 | return true; | |
5159 | ||
5160 | return unit_vtable[t]->supported(); | |
5161 | } | |
5162 | ||
8b4305c7 LP |
5163 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
5164 | int r; | |
5165 | ||
5166 | assert(u); | |
5167 | assert(where); | |
5168 | ||
5169 | r = dir_is_empty(where); | |
3f602115 | 5170 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
5171 | return; |
5172 | if (r < 0) { | |
5173 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
5174 | return; | |
5175 | } | |
5176 | ||
5177 | log_struct(LOG_NOTICE, | |
2b044526 | 5178 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 5179 | LOG_UNIT_ID(u), |
f1c50bec | 5180 | LOG_UNIT_INVOCATION_ID(u), |
8b4305c7 | 5181 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), |
a1230ff9 | 5182 | "WHERE=%s", where); |
8b4305c7 LP |
5183 | } |
5184 | ||
25cd4964 | 5185 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
58d9d89b | 5186 | _cleanup_free_ char *canonical_where = NULL; |
8b4305c7 LP |
5187 | int r; |
5188 | ||
5189 | assert(u); | |
5190 | assert(where); | |
5191 | ||
a5648b80 | 5192 | r = chase_symlinks(where, NULL, CHASE_NONEXISTENT, &canonical_where, NULL); |
8b4305c7 | 5193 | if (r < 0) { |
25cd4964 | 5194 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
5195 | return 0; |
5196 | } | |
25cd4964 AJ |
5197 | |
5198 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
5199 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
5200 | return 0; |
5201 | ||
25cd4964 | 5202 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
8b4305c7 | 5203 | log_struct(LOG_ERR, |
2b044526 | 5204 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 5205 | LOG_UNIT_ID(u), |
f1c50bec | 5206 | LOG_UNIT_INVOCATION_ID(u), |
25cd4964 | 5207 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), |
a1230ff9 | 5208 | "WHERE=%s", where); |
8b4305c7 LP |
5209 | |
5210 | return -ELOOP; | |
5211 | } | |
0f13f3bd LP |
5212 | |
5213 | bool unit_is_pristine(Unit *u) { | |
5214 | assert(u); | |
5215 | ||
7c65093a | 5216 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
5217 | * in a number of different ways. Note that to cater for unit |
5218 | * types such as slice, we are generally fine with units that | |
e9e8cbc8 ZJS |
5219 | * are marked UNIT_LOADED even though nothing was actually |
5220 | * loaded, as those unit types don't require a file on disk. */ | |
0f13f3bd LP |
5221 | |
5222 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
5223 | u->fragment_path || | |
5224 | u->source_path || | |
5225 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
5226 | u->job || |
5227 | u->merged_into); | |
5228 | } | |
291d565a LP |
5229 | |
5230 | pid_t unit_control_pid(Unit *u) { | |
5231 | assert(u); | |
5232 | ||
5233 | if (UNIT_VTABLE(u)->control_pid) | |
5234 | return UNIT_VTABLE(u)->control_pid(u); | |
5235 | ||
5236 | return 0; | |
5237 | } | |
5238 | ||
5239 | pid_t unit_main_pid(Unit *u) { | |
5240 | assert(u); | |
5241 | ||
5242 | if (UNIT_VTABLE(u)->main_pid) | |
5243 | return UNIT_VTABLE(u)->main_pid(u); | |
5244 | ||
5245 | return 0; | |
5246 | } | |
00d9ef85 LP |
5247 | |
5248 | static void unit_unref_uid_internal( | |
5249 | Unit *u, | |
5250 | uid_t *ref_uid, | |
5251 | bool destroy_now, | |
5252 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
5253 | ||
5254 | assert(u); | |
5255 | assert(ref_uid); | |
5256 | assert(_manager_unref_uid); | |
5257 | ||
5258 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
5259 | * gid_t are actually the same time, with the same validity rules. | |
5260 | * | |
5261 | * Drops a reference to UID/GID from a unit. */ | |
5262 | ||
5263 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
5264 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
5265 | ||
5266 | if (!uid_is_valid(*ref_uid)) | |
5267 | return; | |
5268 | ||
5269 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
5270 | *ref_uid = UID_INVALID; | |
5271 | } | |
5272 | ||
b90cf102 | 5273 | static void unit_unref_uid(Unit *u, bool destroy_now) { |
00d9ef85 LP |
5274 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); |
5275 | } | |
5276 | ||
b90cf102 | 5277 | static void unit_unref_gid(Unit *u, bool destroy_now) { |
00d9ef85 LP |
5278 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); |
5279 | } | |
5280 | ||
b90cf102 LP |
5281 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { |
5282 | assert(u); | |
5283 | ||
5284 | unit_unref_uid(u, destroy_now); | |
5285 | unit_unref_gid(u, destroy_now); | |
5286 | } | |
5287 | ||
00d9ef85 LP |
5288 | static int unit_ref_uid_internal( |
5289 | Unit *u, | |
5290 | uid_t *ref_uid, | |
5291 | uid_t uid, | |
5292 | bool clean_ipc, | |
5293 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
5294 | ||
5295 | int r; | |
5296 | ||
5297 | assert(u); | |
5298 | assert(ref_uid); | |
5299 | assert(uid_is_valid(uid)); | |
5300 | assert(_manager_ref_uid); | |
5301 | ||
5302 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
5303 | * are actually the same type, and have the same validity rules. | |
5304 | * | |
5305 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
5306 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
5307 | * drops to zero. */ | |
5308 | ||
5309 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
5310 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
5311 | ||
5312 | if (*ref_uid == uid) | |
5313 | return 0; | |
5314 | ||
5315 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
5316 | return -EBUSY; | |
5317 | ||
5318 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
5319 | if (r < 0) | |
5320 | return r; | |
5321 | ||
5322 | *ref_uid = uid; | |
5323 | return 1; | |
5324 | } | |
5325 | ||
b90cf102 | 5326 | static int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { |
00d9ef85 LP |
5327 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); |
5328 | } | |
5329 | ||
b90cf102 | 5330 | static int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { |
00d9ef85 LP |
5331 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); |
5332 | } | |
5333 | ||
5334 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
5335 | int r = 0, q = 0; | |
5336 | ||
5337 | assert(u); | |
5338 | ||
5339 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
5340 | ||
5341 | if (uid_is_valid(uid)) { | |
5342 | r = unit_ref_uid(u, uid, clean_ipc); | |
5343 | if (r < 0) | |
5344 | return r; | |
5345 | } | |
5346 | ||
5347 | if (gid_is_valid(gid)) { | |
5348 | q = unit_ref_gid(u, gid, clean_ipc); | |
5349 | if (q < 0) { | |
5350 | if (r > 0) | |
5351 | unit_unref_uid(u, false); | |
5352 | ||
5353 | return q; | |
5354 | } | |
5355 | } | |
5356 | ||
5357 | return r > 0 || q > 0; | |
5358 | } | |
5359 | ||
5360 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
5361 | ExecContext *c; | |
5362 | int r; | |
5363 | ||
5364 | assert(u); | |
5365 | ||
5366 | c = unit_get_exec_context(u); | |
5367 | ||
5368 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
5369 | if (r < 0) | |
5370 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
5371 | ||
5372 | return r; | |
5373 | } | |
5374 | ||
00d9ef85 LP |
5375 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { |
5376 | int r; | |
5377 | ||
5378 | assert(u); | |
5379 | ||
5380 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
5381 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
5382 | * objects when no service references the UID/GID anymore. */ | |
5383 | ||
5384 | r = unit_ref_uid_gid(u, uid, gid); | |
5385 | if (r > 0) | |
37d0b962 | 5386 | unit_add_to_dbus_queue(u); |
00d9ef85 | 5387 | } |
4b58153d | 5388 | |
4b58153d LP |
5389 | int unit_acquire_invocation_id(Unit *u) { |
5390 | sd_id128_t id; | |
5391 | int r; | |
5392 | ||
5393 | assert(u); | |
5394 | ||
5395 | r = sd_id128_randomize(&id); | |
5396 | if (r < 0) | |
5397 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
5398 | ||
5399 | r = unit_set_invocation_id(u, id); | |
5400 | if (r < 0) | |
5401 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
5402 | ||
af92c603 | 5403 | unit_add_to_dbus_queue(u); |
4b58153d LP |
5404 | return 0; |
5405 | } | |
f0d47797 | 5406 | |
1ad6e8b3 LP |
5407 | int unit_set_exec_params(Unit *u, ExecParameters *p) { |
5408 | int r; | |
5409 | ||
7960b0c7 LP |
5410 | assert(u); |
5411 | assert(p); | |
f0d47797 | 5412 | |
004c7f16 | 5413 | /* Copy parameters from manager */ |
1ad6e8b3 LP |
5414 | r = manager_get_effective_environment(u->manager, &p->environment); |
5415 | if (r < 0) | |
5416 | return r; | |
5417 | ||
004c7f16 LP |
5418 | p->confirm_spawn = manager_get_confirm_spawn(u->manager); |
5419 | p->cgroup_supported = u->manager->cgroup_supported; | |
5420 | p->prefix = u->manager->prefix; | |
5421 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
5422 | ||
5238e957 | 5423 | /* Copy parameters from unit */ |
7960b0c7 | 5424 | p->cgroup_path = u->cgroup_path; |
1d9cc876 | 5425 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
1ad6e8b3 LP |
5426 | |
5427 | return 0; | |
f0d47797 | 5428 | } |
a79279c7 | 5429 | |
4c253ed1 | 5430 | int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) { |
a79279c7 LP |
5431 | int r; |
5432 | ||
5433 | assert(u); | |
5434 | assert(ret); | |
5435 | ||
5436 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
5437 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
5438 | ||
5439 | (void) unit_realize_cgroup(u); | |
5440 | ||
4c253ed1 LP |
5441 | r = safe_fork(name, FORK_REOPEN_LOG, ret); |
5442 | if (r != 0) | |
5443 | return r; | |
a79279c7 | 5444 | |
4c253ed1 LP |
5445 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); |
5446 | (void) ignore_signals(SIGPIPE, -1); | |
a79279c7 | 5447 | |
4c253ed1 | 5448 | (void) prctl(PR_SET_PDEATHSIG, SIGTERM); |
a79279c7 | 5449 | |
4c253ed1 LP |
5450 | if (u->cgroup_path) { |
5451 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
5452 | if (r < 0) { | |
5453 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", u->cgroup_path); | |
5454 | _exit(EXIT_CGROUP); | |
a79279c7 | 5455 | } |
a79279c7 LP |
5456 | } |
5457 | ||
4c253ed1 | 5458 | return 0; |
a79279c7 | 5459 | } |
c999cf38 | 5460 | |
810ef318 YW |
5461 | int unit_fork_and_watch_rm_rf(Unit *u, char **paths, pid_t *ret_pid) { |
5462 | pid_t pid; | |
5463 | int r; | |
5464 | ||
5465 | assert(u); | |
5466 | assert(ret_pid); | |
5467 | ||
5468 | r = unit_fork_helper_process(u, "(sd-rmrf)", &pid); | |
5469 | if (r < 0) | |
5470 | return r; | |
5471 | if (r == 0) { | |
5472 | int ret = EXIT_SUCCESS; | |
5473 | char **i; | |
5474 | ||
5475 | STRV_FOREACH(i, paths) { | |
5476 | r = rm_rf(*i, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_MISSING_OK); | |
5477 | if (r < 0) { | |
5478 | log_error_errno(r, "Failed to remove '%s': %m", *i); | |
5479 | ret = EXIT_FAILURE; | |
5480 | } | |
5481 | } | |
5482 | ||
5483 | _exit(ret); | |
5484 | } | |
5485 | ||
5486 | r = unit_watch_pid(u, pid, true); | |
5487 | if (r < 0) | |
5488 | return r; | |
5489 | ||
5490 | *ret_pid = pid; | |
5491 | return 0; | |
5492 | } | |
5493 | ||
c999cf38 LP |
5494 | static void unit_update_dependency_mask(Unit *u, UnitDependency d, Unit *other, UnitDependencyInfo di) { |
5495 | assert(u); | |
5496 | assert(d >= 0); | |
5497 | assert(d < _UNIT_DEPENDENCY_MAX); | |
5498 | assert(other); | |
5499 | ||
5500 | if (di.origin_mask == 0 && di.destination_mask == 0) { | |
5501 | /* No bit set anymore, let's drop the whole entry */ | |
5502 | assert_se(hashmap_remove(u->dependencies[d], other)); | |
29a743f9 | 5503 | log_unit_debug(u, "lost dependency %s=%s", unit_dependency_to_string(d), other->id); |
c999cf38 LP |
5504 | } else |
5505 | /* Mask was reduced, let's update the entry */ | |
5506 | assert_se(hashmap_update(u->dependencies[d], other, di.data) == 0); | |
5507 | } | |
5508 | ||
5509 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
c999cf38 LP |
5510 | assert(u); |
5511 | ||
5512 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5513 | ||
5514 | if (mask == 0) | |
5515 | return; | |
5516 | ||
f6173cb9 | 5517 | for (UnitDependency d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
c999cf38 LP |
5518 | bool done; |
5519 | ||
5520 | do { | |
5521 | UnitDependencyInfo di; | |
5522 | Unit *other; | |
5523 | Iterator i; | |
5524 | ||
5525 | done = true; | |
5526 | ||
5527 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { | |
c999cf38 LP |
5528 | if ((di.origin_mask & ~mask) == di.origin_mask) |
5529 | continue; | |
5530 | di.origin_mask &= ~mask; | |
5531 | unit_update_dependency_mask(u, d, other, di); | |
5532 | ||
5533 | /* We updated the dependency from our unit to the other unit now. But most dependencies | |
5534 | * imply a reverse dependency. Hence, let's delete that one too. For that we go through | |
5535 | * all dependency types on the other unit and delete all those which point to us and | |
5536 | * have the right mask set. */ | |
5537 | ||
f6173cb9 | 5538 | for (UnitDependency q = 0; q < _UNIT_DEPENDENCY_MAX; q++) { |
c999cf38 LP |
5539 | UnitDependencyInfo dj; |
5540 | ||
5541 | dj.data = hashmap_get(other->dependencies[q], u); | |
5542 | if ((dj.destination_mask & ~mask) == dj.destination_mask) | |
5543 | continue; | |
5544 | dj.destination_mask &= ~mask; | |
5545 | ||
5546 | unit_update_dependency_mask(other, q, u, dj); | |
5547 | } | |
5548 | ||
5549 | unit_add_to_gc_queue(other); | |
5550 | ||
5551 | done = false; | |
5552 | break; | |
5553 | } | |
5554 | ||
5555 | } while (!done); | |
5556 | } | |
5557 | } | |
d3070fbd | 5558 | |
2f8c48b6 AZ |
5559 | static int unit_get_invocation_path(Unit *u, char **ret) { |
5560 | char *p; | |
5561 | int r; | |
5562 | ||
5563 | assert(u); | |
5564 | assert(ret); | |
5565 | ||
5566 | if (MANAGER_IS_SYSTEM(u->manager)) | |
5567 | p = strjoin("/run/systemd/units/invocation:", u->id); | |
5568 | else { | |
5569 | _cleanup_free_ char *user_path = NULL; | |
5570 | r = xdg_user_runtime_dir(&user_path, "/systemd/units/invocation:"); | |
5571 | if (r < 0) | |
5572 | return r; | |
5573 | p = strjoin(user_path, u->id); | |
5574 | } | |
5575 | ||
5576 | if (!p) | |
5577 | return -ENOMEM; | |
5578 | ||
5579 | *ret = p; | |
5580 | return 0; | |
5581 | } | |
5582 | ||
d3070fbd | 5583 | static int unit_export_invocation_id(Unit *u) { |
2f8c48b6 | 5584 | _cleanup_free_ char *p = NULL; |
d3070fbd LP |
5585 | int r; |
5586 | ||
5587 | assert(u); | |
5588 | ||
5589 | if (u->exported_invocation_id) | |
5590 | return 0; | |
5591 | ||
5592 | if (sd_id128_is_null(u->invocation_id)) | |
5593 | return 0; | |
5594 | ||
2f8c48b6 AZ |
5595 | r = unit_get_invocation_path(u, &p); |
5596 | if (r < 0) | |
5597 | return log_unit_debug_errno(u, r, "Failed to get invocation path: %m"); | |
5598 | ||
d3070fbd LP |
5599 | r = symlink_atomic(u->invocation_id_string, p); |
5600 | if (r < 0) | |
5601 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5602 | ||
5603 | u->exported_invocation_id = true; | |
5604 | return 0; | |
5605 | } | |
5606 | ||
5607 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5608 | const char *p; | |
5609 | char buf[2]; | |
5610 | int r; | |
5611 | ||
5612 | assert(u); | |
5613 | assert(c); | |
5614 | ||
5615 | if (u->exported_log_level_max) | |
5616 | return 0; | |
5617 | ||
5618 | if (c->log_level_max < 0) | |
5619 | return 0; | |
5620 | ||
5621 | assert(c->log_level_max <= 7); | |
5622 | ||
5623 | buf[0] = '0' + c->log_level_max; | |
5624 | buf[1] = 0; | |
5625 | ||
5626 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5627 | r = symlink_atomic(buf, p); | |
5628 | if (r < 0) | |
5629 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5630 | ||
5631 | u->exported_log_level_max = true; | |
5632 | return 0; | |
5633 | } | |
5634 | ||
5635 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5636 | _cleanup_close_ int fd = -1; | |
5637 | struct iovec *iovec; | |
5638 | const char *p; | |
5639 | char *pattern; | |
5640 | le64_t *sizes; | |
5641 | ssize_t n; | |
5642 | size_t i; | |
5643 | int r; | |
5644 | ||
5645 | if (u->exported_log_extra_fields) | |
5646 | return 0; | |
5647 | ||
5648 | if (c->n_log_extra_fields <= 0) | |
5649 | return 0; | |
5650 | ||
5651 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5652 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5653 | ||
5654 | for (i = 0; i < c->n_log_extra_fields; i++) { | |
5655 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); | |
5656 | ||
5657 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5658 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5659 | } | |
5660 | ||
5661 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5662 | pattern = strjoina(p, ".XXXXXX"); | |
5663 | ||
5664 | fd = mkostemp_safe(pattern); | |
5665 | if (fd < 0) | |
5666 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5667 | ||
5668 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5669 | if (n < 0) { | |
5670 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5671 | goto fail; | |
5672 | } | |
5673 | ||
5674 | (void) fchmod(fd, 0644); | |
5675 | ||
5676 | if (rename(pattern, p) < 0) { | |
5677 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5678 | goto fail; | |
5679 | } | |
5680 | ||
5681 | u->exported_log_extra_fields = true; | |
5682 | return 0; | |
5683 | ||
5684 | fail: | |
5685 | (void) unlink(pattern); | |
5686 | return r; | |
5687 | } | |
5688 | ||
5ac1530e | 5689 | static int unit_export_log_ratelimit_interval(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5690 | _cleanup_free_ char *buf = NULL; |
5691 | const char *p; | |
5692 | int r; | |
5693 | ||
5694 | assert(u); | |
5695 | assert(c); | |
5696 | ||
5ac1530e | 5697 | if (u->exported_log_ratelimit_interval) |
90fc172e AZ |
5698 | return 0; |
5699 | ||
5ac1530e | 5700 | if (c->log_ratelimit_interval_usec == 0) |
90fc172e AZ |
5701 | return 0; |
5702 | ||
5703 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5704 | ||
5ac1530e | 5705 | if (asprintf(&buf, "%" PRIu64, c->log_ratelimit_interval_usec) < 0) |
90fc172e AZ |
5706 | return log_oom(); |
5707 | ||
5708 | r = symlink_atomic(buf, p); | |
5709 | if (r < 0) | |
5710 | return log_unit_debug_errno(u, r, "Failed to create log rate limit interval symlink %s: %m", p); | |
5711 | ||
5ac1530e | 5712 | u->exported_log_ratelimit_interval = true; |
90fc172e AZ |
5713 | return 0; |
5714 | } | |
5715 | ||
5ac1530e | 5716 | static int unit_export_log_ratelimit_burst(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5717 | _cleanup_free_ char *buf = NULL; |
5718 | const char *p; | |
5719 | int r; | |
5720 | ||
5721 | assert(u); | |
5722 | assert(c); | |
5723 | ||
5ac1530e | 5724 | if (u->exported_log_ratelimit_burst) |
90fc172e AZ |
5725 | return 0; |
5726 | ||
5ac1530e | 5727 | if (c->log_ratelimit_burst == 0) |
90fc172e AZ |
5728 | return 0; |
5729 | ||
5730 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5731 | ||
5ac1530e | 5732 | if (asprintf(&buf, "%u", c->log_ratelimit_burst) < 0) |
90fc172e AZ |
5733 | return log_oom(); |
5734 | ||
5735 | r = symlink_atomic(buf, p); | |
5736 | if (r < 0) | |
5737 | return log_unit_debug_errno(u, r, "Failed to create log rate limit burst symlink %s: %m", p); | |
5738 | ||
5ac1530e | 5739 | u->exported_log_ratelimit_burst = true; |
90fc172e AZ |
5740 | return 0; |
5741 | } | |
5742 | ||
d3070fbd LP |
5743 | void unit_export_state_files(Unit *u) { |
5744 | const ExecContext *c; | |
5745 | ||
5746 | assert(u); | |
5747 | ||
5748 | if (!u->id) | |
5749 | return; | |
5750 | ||
638cece4 | 5751 | if (MANAGER_IS_TEST_RUN(u->manager)) |
8f632531 LP |
5752 | return; |
5753 | ||
d3070fbd LP |
5754 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5755 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5756 | * the IPC system itself and PID 1 also log to the journal. | |
5757 | * | |
5758 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5759 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5760 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5761 | * namespace at least. | |
5762 | * | |
5763 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5764 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5765 | * them with one. */ | |
5766 | ||
5767 | (void) unit_export_invocation_id(u); | |
5768 | ||
2f8c48b6 AZ |
5769 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5770 | return; | |
5771 | ||
d3070fbd LP |
5772 | c = unit_get_exec_context(u); |
5773 | if (c) { | |
5774 | (void) unit_export_log_level_max(u, c); | |
5775 | (void) unit_export_log_extra_fields(u, c); | |
5ac1530e ZJS |
5776 | (void) unit_export_log_ratelimit_interval(u, c); |
5777 | (void) unit_export_log_ratelimit_burst(u, c); | |
d3070fbd LP |
5778 | } |
5779 | } | |
5780 | ||
5781 | void unit_unlink_state_files(Unit *u) { | |
5782 | const char *p; | |
5783 | ||
5784 | assert(u); | |
5785 | ||
5786 | if (!u->id) | |
5787 | return; | |
5788 | ||
d3070fbd LP |
5789 | /* Undoes the effect of unit_export_state() */ |
5790 | ||
5791 | if (u->exported_invocation_id) { | |
2f8c48b6 AZ |
5792 | _cleanup_free_ char *invocation_path = NULL; |
5793 | int r = unit_get_invocation_path(u, &invocation_path); | |
5794 | if (r >= 0) { | |
5795 | (void) unlink(invocation_path); | |
5796 | u->exported_invocation_id = false; | |
5797 | } | |
d3070fbd LP |
5798 | } |
5799 | ||
2f8c48b6 AZ |
5800 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5801 | return; | |
5802 | ||
d3070fbd LP |
5803 | if (u->exported_log_level_max) { |
5804 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5805 | (void) unlink(p); | |
5806 | ||
5807 | u->exported_log_level_max = false; | |
5808 | } | |
5809 | ||
5810 | if (u->exported_log_extra_fields) { | |
5811 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5812 | (void) unlink(p); | |
5813 | ||
5814 | u->exported_log_extra_fields = false; | |
5815 | } | |
90fc172e | 5816 | |
5ac1530e | 5817 | if (u->exported_log_ratelimit_interval) { |
90fc172e AZ |
5818 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); |
5819 | (void) unlink(p); | |
5820 | ||
5ac1530e | 5821 | u->exported_log_ratelimit_interval = false; |
90fc172e AZ |
5822 | } |
5823 | ||
5ac1530e | 5824 | if (u->exported_log_ratelimit_burst) { |
90fc172e AZ |
5825 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); |
5826 | (void) unlink(p); | |
5827 | ||
5ac1530e | 5828 | u->exported_log_ratelimit_burst = false; |
90fc172e | 5829 | } |
d3070fbd | 5830 | } |
5afe510c | 5831 | |
3c7416b6 LP |
5832 | int unit_prepare_exec(Unit *u) { |
5833 | int r; | |
5834 | ||
5835 | assert(u); | |
5836 | ||
fab34748 KL |
5837 | /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable. |
5838 | * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */ | |
5839 | r = bpf_firewall_load_custom(u); | |
5840 | if (r < 0) | |
5841 | return r; | |
5842 | ||
3c7416b6 LP |
5843 | /* Prepares everything so that we can fork of a process for this unit */ |
5844 | ||
5845 | (void) unit_realize_cgroup(u); | |
5846 | ||
5847 | if (u->reset_accounting) { | |
9b2559a1 | 5848 | (void) unit_reset_accounting(u); |
3c7416b6 LP |
5849 | u->reset_accounting = false; |
5850 | } | |
5851 | ||
5852 | unit_export_state_files(u); | |
5853 | ||
5854 | r = unit_setup_exec_runtime(u); | |
5855 | if (r < 0) | |
5856 | return r; | |
5857 | ||
5858 | r = unit_setup_dynamic_creds(u); | |
5859 | if (r < 0) | |
5860 | return r; | |
5861 | ||
5862 | return 0; | |
5863 | } | |
5864 | ||
4c425434 LP |
5865 | static bool ignore_leftover_process(const char *comm) { |
5866 | return comm && comm[0] == '('; /* Most likely our own helper process (PAM?), ignore */ | |
5867 | } | |
5868 | ||
5869 | int unit_log_leftover_process_start(pid_t pid, int sig, void *userdata) { | |
a4634b21 LP |
5870 | _cleanup_free_ char *comm = NULL; |
5871 | ||
5872 | (void) get_process_comm(pid, &comm); | |
5873 | ||
4c425434 | 5874 | if (ignore_leftover_process(comm)) |
c53d2d54 | 5875 | return 0; |
a4634b21 | 5876 | |
4c425434 LP |
5877 | /* During start we print a warning */ |
5878 | ||
a4634b21 LP |
5879 | log_unit_warning(userdata, |
5880 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5881 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5882 | pid, strna(comm)); | |
c53d2d54 DB |
5883 | |
5884 | return 1; | |
a4634b21 LP |
5885 | } |
5886 | ||
4c425434 LP |
5887 | int unit_log_leftover_process_stop(pid_t pid, int sig, void *userdata) { |
5888 | _cleanup_free_ char *comm = NULL; | |
5889 | ||
5890 | (void) get_process_comm(pid, &comm); | |
5891 | ||
5892 | if (ignore_leftover_process(comm)) | |
5893 | return 0; | |
5894 | ||
5895 | /* During stop we only print an informational message */ | |
5896 | ||
5897 | log_unit_info(userdata, | |
5898 | "Unit process " PID_FMT " (%s) remains running after unit stopped.", | |
5899 | pid, strna(comm)); | |
5900 | ||
5901 | return 1; | |
5902 | } | |
5903 | ||
5904 | int unit_warn_leftover_processes(Unit *u, cg_kill_log_func_t log_func) { | |
a4634b21 LP |
5905 | assert(u); |
5906 | ||
5907 | (void) unit_pick_cgroup_path(u); | |
5908 | ||
5909 | if (!u->cgroup_path) | |
c53d2d54 | 5910 | return 0; |
a4634b21 | 5911 | |
4c425434 | 5912 | return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_func, u); |
a4634b21 LP |
5913 | } |
5914 | ||
bb2c7685 LP |
5915 | bool unit_needs_console(Unit *u) { |
5916 | ExecContext *ec; | |
5917 | UnitActiveState state; | |
5918 | ||
5919 | assert(u); | |
5920 | ||
5921 | state = unit_active_state(u); | |
5922 | ||
5923 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5924 | return false; | |
5925 | ||
5926 | if (UNIT_VTABLE(u)->needs_console) | |
5927 | return UNIT_VTABLE(u)->needs_console(u); | |
5928 | ||
5929 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5930 | ec = unit_get_exec_context(u); | |
5931 | if (!ec) | |
5932 | return false; | |
5933 | ||
5934 | return exec_context_may_touch_console(ec); | |
5935 | } | |
5936 | ||
f156e60c | 5937 | const char *unit_label_path(const Unit *u) { |
81e9871e LP |
5938 | const char *p; |
5939 | ||
f156e60c CG |
5940 | assert(u); |
5941 | ||
81e9871e LP |
5942 | /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off |
5943 | * when validating access checks. */ | |
5944 | ||
5945 | p = u->source_path ?: u->fragment_path; | |
5946 | if (!p) | |
5947 | return NULL; | |
5948 | ||
5949 | /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */ | |
5950 | if (path_equal(p, "/dev/null")) | |
5951 | return NULL; | |
5952 | ||
5953 | return p; | |
5954 | } | |
5955 | ||
6592b975 LP |
5956 | int unit_pid_attachable(Unit *u, pid_t pid, sd_bus_error *error) { |
5957 | int r; | |
5958 | ||
5959 | assert(u); | |
5960 | ||
5961 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5962 | * and not a kernel thread either */ | |
5963 | ||
5964 | /* First, a simple range check */ | |
5965 | if (!pid_is_valid(pid)) | |
5966 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier " PID_FMT " is not valid.", pid); | |
5967 | ||
5968 | /* Some extra safety check */ | |
5969 | if (pid == 1 || pid == getpid_cached()) | |
3fe91079 | 5970 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager process, refusing.", pid); |
6592b975 LP |
5971 | |
5972 | /* Don't even begin to bother with kernel threads */ | |
5973 | r = is_kernel_thread(pid); | |
5974 | if (r == -ESRCH) | |
5975 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid); | |
5976 | if (r < 0) | |
5977 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid); | |
5978 | if (r > 0) | |
5979 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid); | |
5980 | ||
5981 | return 0; | |
5982 | } | |
5983 | ||
523ee2d4 LP |
5984 | void unit_log_success(Unit *u) { |
5985 | assert(u); | |
5986 | ||
5987 | log_struct(LOG_INFO, | |
5988 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR, | |
5989 | LOG_UNIT_ID(u), | |
5990 | LOG_UNIT_INVOCATION_ID(u), | |
5991 | LOG_UNIT_MESSAGE(u, "Succeeded.")); | |
5992 | } | |
5993 | ||
7c047d74 LP |
5994 | void unit_log_failure(Unit *u, const char *result) { |
5995 | assert(u); | |
5996 | assert(result); | |
5997 | ||
5998 | log_struct(LOG_WARNING, | |
5999 | "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR, | |
6000 | LOG_UNIT_ID(u), | |
6001 | LOG_UNIT_INVOCATION_ID(u), | |
6002 | LOG_UNIT_MESSAGE(u, "Failed with result '%s'.", result), | |
6003 | "UNIT_RESULT=%s", result); | |
6004 | } | |
6005 | ||
31cd5f63 AZ |
6006 | void unit_log_skip(Unit *u, const char *result) { |
6007 | assert(u); | |
6008 | assert(result); | |
6009 | ||
6010 | log_struct(LOG_INFO, | |
6011 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR, | |
6012 | LOG_UNIT_ID(u), | |
6013 | LOG_UNIT_INVOCATION_ID(u), | |
6014 | LOG_UNIT_MESSAGE(u, "Skipped due to '%s'.", result), | |
6015 | "UNIT_RESULT=%s", result); | |
6016 | } | |
6017 | ||
91bbd9b7 LP |
6018 | void unit_log_process_exit( |
6019 | Unit *u, | |
91bbd9b7 LP |
6020 | const char *kind, |
6021 | const char *command, | |
5cc2cd1c | 6022 | bool success, |
91bbd9b7 LP |
6023 | int code, |
6024 | int status) { | |
6025 | ||
5cc2cd1c ZJS |
6026 | int level; |
6027 | ||
91bbd9b7 LP |
6028 | assert(u); |
6029 | assert(kind); | |
6030 | ||
5cc2cd1c ZJS |
6031 | /* If this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure |
6032 | * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption | |
6033 | * that the service already logged the reason at a higher log level on its own. Otherwise, make it a | |
6034 | * WARNING. */ | |
6035 | if (success) | |
6036 | level = LOG_DEBUG; | |
6037 | else if (code == CLD_EXITED) | |
6038 | level = LOG_NOTICE; | |
6039 | else | |
91bbd9b7 LP |
6040 | level = LOG_WARNING; |
6041 | ||
6042 | log_struct(level, | |
6043 | "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR, | |
6044 | LOG_UNIT_MESSAGE(u, "%s exited, code=%s, status=%i/%s", | |
6045 | kind, | |
6046 | sigchld_code_to_string(code), status, | |
6047 | strna(code == CLD_EXITED | |
6048 | ? exit_status_to_string(status, EXIT_STATUS_FULL) | |
6049 | : signal_to_string(status))), | |
6050 | "EXIT_CODE=%s", sigchld_code_to_string(code), | |
6051 | "EXIT_STATUS=%i", status, | |
6052 | "COMMAND=%s", strna(command), | |
6053 | LOG_UNIT_ID(u), | |
6054 | LOG_UNIT_INVOCATION_ID(u)); | |
6055 | } | |
6056 | ||
7af67e9a LP |
6057 | int unit_exit_status(Unit *u) { |
6058 | assert(u); | |
6059 | ||
6060 | /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range | |
6061 | * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA | |
6062 | * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main | |
6063 | * service process has exited abnormally (signal/coredump). */ | |
6064 | ||
6065 | if (!UNIT_VTABLE(u)->exit_status) | |
6066 | return -EOPNOTSUPP; | |
6067 | ||
6068 | return UNIT_VTABLE(u)->exit_status(u); | |
6069 | } | |
6070 | ||
6071 | int unit_failure_action_exit_status(Unit *u) { | |
6072 | int r; | |
6073 | ||
6074 | assert(u); | |
6075 | ||
6076 | /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */ | |
6077 | ||
6078 | if (u->failure_action_exit_status >= 0) | |
6079 | return u->failure_action_exit_status; | |
6080 | ||
6081 | r = unit_exit_status(u); | |
6082 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
6083 | return 255; | |
6084 | ||
6085 | return r; | |
6086 | } | |
6087 | ||
6088 | int unit_success_action_exit_status(Unit *u) { | |
6089 | int r; | |
6090 | ||
6091 | assert(u); | |
6092 | ||
6093 | /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */ | |
6094 | ||
6095 | if (u->success_action_exit_status >= 0) | |
6096 | return u->success_action_exit_status; | |
6097 | ||
6098 | r = unit_exit_status(u); | |
6099 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
6100 | return 255; | |
6101 | ||
6102 | return r; | |
6103 | } | |
6104 | ||
a4191c9f LP |
6105 | int unit_test_trigger_loaded(Unit *u) { |
6106 | Unit *trigger; | |
6107 | ||
6108 | /* Tests whether the unit to trigger is loaded */ | |
6109 | ||
6110 | trigger = UNIT_TRIGGER(u); | |
6111 | if (!trigger) | |
e7b9f4d9 ZJS |
6112 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
6113 | "Refusing to start, no unit to trigger."); | |
a4191c9f | 6114 | if (trigger->load_state != UNIT_LOADED) |
e7b9f4d9 ZJS |
6115 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
6116 | "Refusing to start, unit %s to trigger not loaded.", trigger->id); | |
a4191c9f LP |
6117 | |
6118 | return 0; | |
6119 | } | |
6120 | ||
95939aed YW |
6121 | void unit_destroy_runtime_directory(Unit *u, const ExecContext *context) { |
6122 | if (context->runtime_directory_preserve_mode == EXEC_PRESERVE_NO || | |
6123 | (context->runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART && !unit_will_restart(u))) | |
6124 | exec_context_destroy_runtime_directory(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME]); | |
6125 | } | |
6126 | ||
380dc8b0 LP |
6127 | int unit_clean(Unit *u, ExecCleanMask mask) { |
6128 | UnitActiveState state; | |
6129 | ||
6130 | assert(u); | |
6131 | ||
6132 | /* Special return values: | |
6133 | * | |
6134 | * -EOPNOTSUPP → cleaning not supported for this unit type | |
6135 | * -EUNATCH → cleaning not defined for this resource type | |
6136 | * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has | |
6137 | * a job queued or similar | |
6138 | */ | |
6139 | ||
6140 | if (!UNIT_VTABLE(u)->clean) | |
6141 | return -EOPNOTSUPP; | |
6142 | ||
6143 | if (mask == 0) | |
6144 | return -EUNATCH; | |
6145 | ||
6146 | if (u->load_state != UNIT_LOADED) | |
6147 | return -EBUSY; | |
6148 | ||
6149 | if (u->job) | |
6150 | return -EBUSY; | |
6151 | ||
6152 | state = unit_active_state(u); | |
6153 | if (!IN_SET(state, UNIT_INACTIVE)) | |
6154 | return -EBUSY; | |
6155 | ||
6156 | return UNIT_VTABLE(u)->clean(u, mask); | |
6157 | } | |
6158 | ||
6159 | int unit_can_clean(Unit *u, ExecCleanMask *ret) { | |
6160 | assert(u); | |
6161 | ||
6162 | if (!UNIT_VTABLE(u)->clean || | |
6163 | u->load_state != UNIT_LOADED) { | |
6164 | *ret = 0; | |
6165 | return 0; | |
6166 | } | |
6167 | ||
6168 | /* When the clean() method is set, can_clean() really should be set too */ | |
6169 | assert(UNIT_VTABLE(u)->can_clean); | |
6170 | ||
6171 | return UNIT_VTABLE(u)->can_clean(u, ret); | |
6172 | } | |
6173 | ||
d9e45bc3 MS |
6174 | bool unit_can_freeze(Unit *u) { |
6175 | assert(u); | |
6176 | ||
6177 | if (UNIT_VTABLE(u)->can_freeze) | |
6178 | return UNIT_VTABLE(u)->can_freeze(u); | |
6179 | ||
6180 | return UNIT_VTABLE(u)->freeze; | |
6181 | } | |
6182 | ||
6183 | void unit_frozen(Unit *u) { | |
6184 | assert(u); | |
6185 | ||
6186 | u->freezer_state = FREEZER_FROZEN; | |
6187 | ||
6188 | bus_unit_send_pending_freezer_message(u); | |
6189 | } | |
6190 | ||
6191 | void unit_thawed(Unit *u) { | |
6192 | assert(u); | |
6193 | ||
6194 | u->freezer_state = FREEZER_RUNNING; | |
6195 | ||
6196 | bus_unit_send_pending_freezer_message(u); | |
6197 | } | |
6198 | ||
6199 | static int unit_freezer_action(Unit *u, FreezerAction action) { | |
6200 | UnitActiveState s; | |
6201 | int (*method)(Unit*); | |
6202 | int r; | |
6203 | ||
6204 | assert(u); | |
6205 | assert(IN_SET(action, FREEZER_FREEZE, FREEZER_THAW)); | |
6206 | ||
6207 | method = action == FREEZER_FREEZE ? UNIT_VTABLE(u)->freeze : UNIT_VTABLE(u)->thaw; | |
6208 | if (!method || !cg_freezer_supported()) | |
6209 | return -EOPNOTSUPP; | |
6210 | ||
6211 | if (u->job) | |
6212 | return -EBUSY; | |
6213 | ||
6214 | if (u->load_state != UNIT_LOADED) | |
6215 | return -EHOSTDOWN; | |
6216 | ||
6217 | s = unit_active_state(u); | |
6218 | if (s != UNIT_ACTIVE) | |
6219 | return -EHOSTDOWN; | |
6220 | ||
6221 | if (IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_THAWING)) | |
6222 | return -EALREADY; | |
6223 | ||
6224 | r = method(u); | |
6225 | if (r <= 0) | |
6226 | return r; | |
6227 | ||
6228 | return 1; | |
6229 | } | |
6230 | ||
6231 | int unit_freeze(Unit *u) { | |
6232 | return unit_freezer_action(u, FREEZER_FREEZE); | |
6233 | } | |
6234 | ||
6235 | int unit_thaw(Unit *u) { | |
6236 | return unit_freezer_action(u, FREEZER_THAW); | |
6237 | } | |
6238 | ||
6239 | /* Wrappers around low-level cgroup freezer operations common for service and scope units */ | |
6240 | int unit_freeze_vtable_common(Unit *u) { | |
6241 | return unit_cgroup_freezer_action(u, FREEZER_FREEZE); | |
6242 | } | |
6243 | ||
6244 | int unit_thaw_vtable_common(Unit *u) { | |
6245 | return unit_cgroup_freezer_action(u, FREEZER_THAW); | |
6246 | } | |
6247 | ||
5afe510c LP |
6248 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
6249 | [COLLECT_INACTIVE] = "inactive", | |
6250 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
6251 | }; | |
6252 | ||
6253 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); |