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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), |
cd990847 | 261 | "failed 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 | |
50fb00b7 | 623 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 624 | |
2c289ea8 | 625 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
626 | unit_remove_transient(u); |
627 | ||
c1e1601e LP |
628 | bus_unit_send_removed_signal(u); |
629 | ||
598459ce | 630 | unit_done(u); |
a013b84b | 631 | |
50be4f4a | 632 | unit_dequeue_rewatch_pids(u); |
cf9fd508 | 633 | |
50be4f4a | 634 | sd_bus_slot_unref(u->match_bus_slot); |
05a98afd LP |
635 | sd_bus_track_unref(u->bus_track); |
636 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
d9e45bc3 | 637 | u->pending_freezer_message = sd_bus_message_unref(u->pending_freezer_message); |
05a98afd | 638 | |
a57f7e2c LP |
639 | unit_free_requires_mounts_for(u); |
640 | ||
4562c355 | 641 | SET_FOREACH(t, u->aliases, i) |
ac155bb8 | 642 | hashmap_remove_value(u->manager->units, t, u); |
4562c355 ZJS |
643 | if (u->id) |
644 | hashmap_remove_value(u->manager->units, u->id, u); | |
87f0e418 | 645 | |
4b58153d LP |
646 | if (!sd_id128_is_null(u->invocation_id)) |
647 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
648 | ||
97e7d748 MS |
649 | if (u->job) { |
650 | Job *j = u->job; | |
651 | job_uninstall(j); | |
652 | job_free(j); | |
653 | } | |
964e0949 | 654 | |
e0209d83 MS |
655 | if (u->nop_job) { |
656 | Job *j = u->nop_job; | |
657 | job_uninstall(j); | |
658 | job_free(j); | |
659 | } | |
660 | ||
f6173cb9 | 661 | for (UnitDependency d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 662 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 663 | |
4c591f39 MK |
664 | /* A unit is being dropped from the tree, make sure our family is realized properly. Do this after we |
665 | * detach the unit from slice tree in order to eliminate its effect on controller masks. */ | |
f23ba94d | 666 | if (UNIT_ISSET(u->slice)) |
4c591f39 | 667 | unit_add_family_to_cgroup_realize_queue(UNIT_DEREF(u->slice)); |
fb46fca7 | 668 | |
adefcf28 LP |
669 | if (u->on_console) |
670 | manager_unref_console(u->manager); | |
671 | ||
efdb0237 | 672 | unit_release_cgroup(u); |
72673e86 | 673 | |
d3070fbd LP |
674 | if (!MANAGER_IS_RELOADING(u->manager)) |
675 | unit_unlink_state_files(u); | |
676 | ||
00d9ef85 LP |
677 | unit_unref_uid_gid(u, false); |
678 | ||
5269eb6b | 679 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 680 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 681 | |
a911bb9a LP |
682 | unit_unwatch_all_pids(u); |
683 | ||
702a2d8f | 684 | unit_ref_unset(&u->slice); |
7f7d01ed ZJS |
685 | while (u->refs_by_target) |
686 | unit_ref_unset(u->refs_by_target); | |
57020a3a | 687 | |
ac155bb8 | 688 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 689 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 690 | |
ac155bb8 | 691 | if (u->in_load_queue) |
71fda00f | 692 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 693 | |
ac155bb8 | 694 | if (u->in_dbus_queue) |
71fda00f | 695 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 696 | |
a2d72e26 | 697 | if (u->in_gc_queue) |
c5a97ed1 | 698 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 699 | |
91a6073e LP |
700 | if (u->in_cgroup_realize_queue) |
701 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 702 | |
09e24654 LP |
703 | if (u->in_cgroup_empty_queue) |
704 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
705 | ||
1bdf2790 ZJS |
706 | if (u->in_cleanup_queue) |
707 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
adefcf28 | 708 | |
19496554 MS |
709 | if (u->in_target_deps_queue) |
710 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
711 | ||
a3c1168a LP |
712 | if (u->in_stop_when_unneeded_queue) |
713 | LIST_REMOVE(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
714 | ||
6a48d82f DM |
715 | safe_close(u->ip_accounting_ingress_map_fd); |
716 | safe_close(u->ip_accounting_egress_map_fd); | |
72673e86 | 717 | |
6a48d82f DM |
718 | safe_close(u->ipv4_allow_map_fd); |
719 | safe_close(u->ipv6_allow_map_fd); | |
720 | safe_close(u->ipv4_deny_map_fd); | |
721 | safe_close(u->ipv6_deny_map_fd); | |
d3070fbd | 722 | |
6a48d82f | 723 | bpf_program_unref(u->ip_bpf_ingress); |
aa2b6f1d | 724 | bpf_program_unref(u->ip_bpf_ingress_installed); |
6a48d82f | 725 | bpf_program_unref(u->ip_bpf_egress); |
aa2b6f1d | 726 | bpf_program_unref(u->ip_bpf_egress_installed); |
00d9ef85 | 727 | |
fab34748 KL |
728 | set_free(u->ip_bpf_custom_ingress); |
729 | set_free(u->ip_bpf_custom_egress); | |
730 | set_free(u->ip_bpf_custom_ingress_installed); | |
731 | set_free(u->ip_bpf_custom_egress_installed); | |
732 | ||
084c7007 RG |
733 | bpf_program_unref(u->bpf_device_control_installed); |
734 | ||
a946fa9b ZJS |
735 | condition_free_list(u->conditions); |
736 | condition_free_list(u->asserts); | |
f755e3b7 | 737 | |
ac155bb8 | 738 | free(u->description); |
49dbfa7b | 739 | strv_free(u->documentation); |
ac155bb8 | 740 | free(u->fragment_path); |
1b64d026 | 741 | free(u->source_path); |
ae7a7182 | 742 | strv_free(u->dropin_paths); |
ac155bb8 | 743 | free(u->instance); |
87f0e418 | 744 | |
f189ab18 | 745 | free(u->job_timeout_reboot_arg); |
6bf0f408 LP |
746 | free(u->reboot_arg); |
747 | ||
4562c355 ZJS |
748 | set_free_free(u->aliases); |
749 | free(u->id); | |
750 | ||
87f0e418 LP |
751 | free(u); |
752 | } | |
753 | ||
d9e45bc3 MS |
754 | FreezerState unit_freezer_state(Unit *u) { |
755 | assert(u); | |
756 | ||
757 | return u->freezer_state; | |
758 | } | |
759 | ||
760 | int unit_freezer_state_kernel(Unit *u, FreezerState *ret) { | |
761 | char *values[1] = {}; | |
762 | int r; | |
763 | ||
764 | assert(u); | |
765 | ||
766 | r = cg_get_keyed_attribute(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "cgroup.events", | |
767 | STRV_MAKE("frozen"), values); | |
768 | if (r < 0) | |
769 | return r; | |
770 | ||
771 | r = _FREEZER_STATE_INVALID; | |
772 | ||
773 | if (values[0]) { | |
774 | if (streq(values[0], "0")) | |
775 | r = FREEZER_RUNNING; | |
776 | else if (streq(values[0], "1")) | |
777 | r = FREEZER_FROZEN; | |
778 | } | |
779 | ||
780 | free(values[0]); | |
781 | *ret = r; | |
782 | ||
783 | return 0; | |
784 | } | |
785 | ||
87f0e418 LP |
786 | UnitActiveState unit_active_state(Unit *u) { |
787 | assert(u); | |
788 | ||
ac155bb8 | 789 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
790 | return unit_active_state(unit_follow_merge(u)); |
791 | ||
792 | /* After a reload it might happen that a unit is not correctly | |
793 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 794 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
795 | |
796 | return UNIT_VTABLE(u)->active_state(u); | |
797 | } | |
798 | ||
10a94420 LP |
799 | const char* unit_sub_state_to_string(Unit *u) { |
800 | assert(u); | |
801 | ||
802 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
803 | } | |
804 | ||
eef85c4a | 805 | static int hashmap_complete_move(Hashmap **s, Hashmap **other) { |
23a177ef LP |
806 | assert(s); |
807 | assert(other); | |
87f0e418 | 808 | |
23a177ef | 809 | if (!*other) |
7c0b05e5 | 810 | return 0; |
87f0e418 | 811 | |
eef85c4a LP |
812 | if (*s) |
813 | return hashmap_move(*s, *other); | |
ae2a15bc LP |
814 | else |
815 | *s = TAKE_PTR(*other); | |
7c0b05e5 MS |
816 | |
817 | return 0; | |
23a177ef | 818 | } |
87f0e418 | 819 | |
7c0b05e5 | 820 | static int merge_names(Unit *u, Unit *other) { |
4562c355 | 821 | char *name; |
23a177ef | 822 | Iterator i; |
7c0b05e5 | 823 | int r; |
87f0e418 | 824 | |
23a177ef LP |
825 | assert(u); |
826 | assert(other); | |
827 | ||
4562c355 | 828 | r = unit_add_alias(u, other->id); |
7c0b05e5 MS |
829 | if (r < 0) |
830 | return r; | |
23a177ef | 831 | |
4562c355 ZJS |
832 | r = set_move(u->aliases, other->aliases); |
833 | if (r < 0) { | |
834 | set_remove(u->aliases, other->id); | |
835 | return r; | |
836 | } | |
23a177ef | 837 | |
4562c355 ZJS |
838 | TAKE_PTR(other->id); |
839 | other->aliases = set_free_free(other->aliases); | |
23a177ef | 840 | |
4562c355 ZJS |
841 | SET_FOREACH(name, u->aliases, i) |
842 | assert_se(hashmap_replace(u->manager->units, name, u) == 0); | |
7c0b05e5 MS |
843 | |
844 | return 0; | |
87f0e418 LP |
845 | } |
846 | ||
09a65f92 MS |
847 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
848 | unsigned n_reserve; | |
849 | ||
850 | assert(u); | |
851 | assert(other); | |
852 | assert(d < _UNIT_DEPENDENCY_MAX); | |
853 | ||
854 | /* | |
855 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 856 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
857 | * as a whole to u by complete_move(). |
858 | */ | |
859 | if (!u->dependencies[d]) | |
860 | return 0; | |
861 | ||
862 | /* merge_dependencies() will skip a u-on-u dependency */ | |
eef85c4a | 863 | n_reserve = hashmap_size(other->dependencies[d]) - !!hashmap_get(other->dependencies[d], u); |
09a65f92 | 864 | |
eef85c4a | 865 | return hashmap_reserve(u->dependencies[d], n_reserve); |
09a65f92 MS |
866 | } |
867 | ||
d1fab3fe | 868 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
869 | Iterator i; |
870 | Unit *back; | |
eef85c4a | 871 | void *v; |
87f0e418 | 872 | int r; |
23a177ef | 873 | |
eef85c4a LP |
874 | /* Merges all dependencies of type 'd' of the unit 'other' into the deps of the unit 'u' */ |
875 | ||
23a177ef LP |
876 | assert(u); |
877 | assert(other); | |
878 | assert(d < _UNIT_DEPENDENCY_MAX); | |
879 | ||
5238e957 | 880 | /* Fix backwards pointers. Let's iterate through all dependent units of the other unit. */ |
f6173cb9 | 881 | HASHMAP_FOREACH_KEY(v, back, other->dependencies[d], i) |
eef85c4a | 882 | |
f6173cb9 ZJS |
883 | /* Let's now iterate through the dependencies of that dependencies of the other units, |
884 | * looking for pointers back, and let's fix them up, to instead point to 'u'. */ | |
885 | for (UnitDependency k = 0; k < _UNIT_DEPENDENCY_MAX; k++) | |
e66047ff | 886 | if (back == u) { |
eef85c4a LP |
887 | /* Do not add dependencies between u and itself. */ |
888 | if (hashmap_remove(back->dependencies[k], other)) | |
f2341e0a | 889 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff | 890 | } else { |
f6173cb9 | 891 | UnitDependencyInfo di_u, di_other; |
eef85c4a LP |
892 | |
893 | /* Let's drop this dependency between "back" and "other", and let's create it between | |
894 | * "back" and "u" instead. Let's merge the bit masks of the dependency we are moving, | |
895 | * and any such dependency which might already exist */ | |
896 | ||
897 | di_other.data = hashmap_get(back->dependencies[k], other); | |
898 | if (!di_other.data) | |
899 | continue; /* dependency isn't set, let's try the next one */ | |
900 | ||
901 | di_u.data = hashmap_get(back->dependencies[k], u); | |
902 | ||
f6173cb9 | 903 | UnitDependencyInfo di_merged = { |
eef85c4a LP |
904 | .origin_mask = di_u.origin_mask | di_other.origin_mask, |
905 | .destination_mask = di_u.destination_mask | di_other.destination_mask, | |
906 | }; | |
907 | ||
908 | r = hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data); | |
909 | if (r < 0) | |
910 | log_warning_errno(r, "Failed to remove/replace: back=%s other=%s u=%s: %m", back->id, other_id, u->id); | |
911 | assert(r >= 0); | |
912 | ||
913 | /* assert_se(hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data) >= 0); */ | |
e66047ff | 914 | } |
23a177ef | 915 | |
e66047ff | 916 | /* Also do not move dependencies on u to itself */ |
eef85c4a | 917 | back = hashmap_remove(other->dependencies[d], u); |
d1fab3fe | 918 | if (back) |
f2341e0a | 919 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 920 | |
7c0b05e5 | 921 | /* The move cannot fail. The caller must have performed a reservation. */ |
eef85c4a | 922 | assert_se(hashmap_complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); |
23a177ef | 923 | |
eef85c4a | 924 | other->dependencies[d] = hashmap_free(other->dependencies[d]); |
23a177ef LP |
925 | } |
926 | ||
927 | int unit_merge(Unit *u, Unit *other) { | |
d1fab3fe | 928 | const char *other_id = NULL; |
09a65f92 | 929 | int r; |
87f0e418 LP |
930 | |
931 | assert(u); | |
932 | assert(other); | |
ac155bb8 MS |
933 | assert(u->manager == other->manager); |
934 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 935 | |
cc916967 LP |
936 | other = unit_follow_merge(other); |
937 | ||
23a177ef LP |
938 | if (other == u) |
939 | return 0; | |
940 | ||
ac155bb8 | 941 | if (u->type != other->type) |
9e2f7c11 LP |
942 | return -EINVAL; |
943 | ||
8a993b61 | 944 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
945 | return -EEXIST; |
946 | ||
ec2ce0c5 | 947 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 948 | return -EEXIST; |
87f0e418 | 949 | |
d383acad ZJS |
950 | if (!streq_ptr(u->instance, other->instance)) |
951 | return -EINVAL; | |
952 | ||
ac155bb8 | 953 | if (other->job) |
819e213f LP |
954 | return -EEXIST; |
955 | ||
e0209d83 MS |
956 | if (other->nop_job) |
957 | return -EEXIST; | |
958 | ||
fdf20a31 | 959 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
960 | return -EEXIST; |
961 | ||
d1fab3fe ZJS |
962 | if (other->id) |
963 | other_id = strdupa(other->id); | |
964 | ||
09a65f92 | 965 | /* Make reservations to ensure merge_dependencies() won't fail */ |
f6173cb9 | 966 | for (UnitDependency d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
09a65f92 MS |
967 | r = reserve_dependencies(u, other, d); |
968 | /* | |
969 | * We don't rollback reservations if we fail. We don't have | |
970 | * a way to undo reservations. A reservation is not a leak. | |
971 | */ | |
972 | if (r < 0) | |
973 | return r; | |
974 | } | |
975 | ||
87f0e418 | 976 | /* Merge names */ |
7c0b05e5 MS |
977 | r = merge_names(u, other); |
978 | if (r < 0) | |
979 | return r; | |
87f0e418 | 980 | |
57020a3a | 981 | /* Redirect all references */ |
7f7d01ed ZJS |
982 | while (other->refs_by_target) |
983 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
57020a3a | 984 | |
87f0e418 | 985 | /* Merge dependencies */ |
f6173cb9 | 986 | for (UnitDependency d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
d1fab3fe | 987 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 988 | |
ac155bb8 MS |
989 | other->load_state = UNIT_MERGED; |
990 | other->merged_into = u; | |
23a177ef | 991 | |
3616a49c LP |
992 | /* If there is still some data attached to the other node, we |
993 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 994 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
995 | if (UNIT_VTABLE(other)->done) |
996 | UNIT_VTABLE(other)->done(other); | |
997 | ||
998 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
999 | unit_add_to_cleanup_queue(other); |
1000 | ||
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 1005 | _cleanup_free_ char *s = NULL; |
23a177ef | 1006 | Unit *other; |
9e2f7c11 | 1007 | int r; |
23a177ef | 1008 | |
e8630e69 ZJS |
1009 | /* Either add name to u, or if a unit with name already exists, merge it with u. |
1010 | * If name is a template, do the same for name@instance, where instance is u's instance. */ | |
1011 | ||
23a177ef LP |
1012 | assert(u); |
1013 | assert(name); | |
1014 | ||
7410616c | 1015 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 1016 | if (!u->instance) |
9e2f7c11 LP |
1017 | return -EINVAL; |
1018 | ||
7410616c LP |
1019 | r = unit_name_replace_instance(name, u->instance, &s); |
1020 | if (r < 0) | |
1021 | return r; | |
9e2f7c11 LP |
1022 | |
1023 | name = s; | |
1024 | } | |
1025 | ||
c2756a68 | 1026 | other = manager_get_unit(u->manager, name); |
7410616c LP |
1027 | if (other) |
1028 | return unit_merge(u, other); | |
23a177ef | 1029 | |
7410616c | 1030 | return unit_add_name(u, name); |
23a177ef LP |
1031 | } |
1032 | ||
1033 | Unit* unit_follow_merge(Unit *u) { | |
1034 | assert(u); | |
1035 | ||
ac155bb8 MS |
1036 | while (u->load_state == UNIT_MERGED) |
1037 | assert_se(u = u->merged_into); | |
23a177ef LP |
1038 | |
1039 | return u; | |
1040 | } | |
1041 | ||
1042 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
ada5e276 YW |
1043 | ExecDirectoryType dt; |
1044 | char **dp; | |
23a177ef LP |
1045 | int r; |
1046 | ||
1047 | assert(u); | |
1048 | assert(c); | |
1049 | ||
e1e74614 | 1050 | if (c->working_directory && !c->working_directory_missing_ok) { |
eef85c4a | 1051 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1052 | if (r < 0) |
1053 | return r; | |
1054 | } | |
1055 | ||
1056 | if (c->root_directory) { | |
eef85c4a | 1057 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1058 | if (r < 0) |
1059 | return r; | |
1060 | } | |
1061 | ||
915e6d16 | 1062 | if (c->root_image) { |
eef85c4a | 1063 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
1064 | if (r < 0) |
1065 | return r; | |
1066 | } | |
1067 | ||
72fd1768 | 1068 | for (dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
1069 | if (!u->manager->prefix[dt]) |
1070 | continue; | |
1071 | ||
1072 | STRV_FOREACH(dp, c->directories[dt].paths) { | |
1073 | _cleanup_free_ char *p; | |
1074 | ||
657ee2d8 | 1075 | p = path_join(u->manager->prefix[dt], *dp); |
ada5e276 YW |
1076 | if (!p) |
1077 | return -ENOMEM; | |
1078 | ||
eef85c4a | 1079 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
1080 | if (r < 0) |
1081 | return r; | |
1082 | } | |
1083 | } | |
1084 | ||
463d0d15 | 1085 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
1086 | return 0; |
1087 | ||
f3b7a79b LP |
1088 | /* For the following three directory types we need write access, and /var/ is possibly on the root |
1089 | * fs. Hence order after systemd-remount-fs.service, to ensure things are writable. */ | |
1090 | if (!strv_isempty(c->directories[EXEC_DIRECTORY_STATE].paths) || | |
1091 | !strv_isempty(c->directories[EXEC_DIRECTORY_CACHE].paths) || | |
1092 | !strv_isempty(c->directories[EXEC_DIRECTORY_LOGS].paths)) { | |
1093 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, true, UNIT_DEPENDENCY_FILE); | |
1094 | if (r < 0) | |
1095 | return r; | |
1096 | } | |
1097 | ||
b46a529c | 1098 | if (c->private_tmp) { |
d71f0505 LP |
1099 | const char *p; |
1100 | ||
1101 | FOREACH_STRING(p, "/tmp", "/var/tmp") { | |
eef85c4a | 1102 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
d71f0505 LP |
1103 | if (r < 0) |
1104 | return r; | |
1105 | } | |
b46a529c | 1106 | |
35d8c19a | 1107 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1108 | if (r < 0) |
1109 | return r; | |
1110 | } | |
1111 | ||
33b58dfb LP |
1112 | if (c->root_image) { |
1113 | /* We need to wait for /dev/loopX to appear when doing RootImage=, hence let's add an | |
1114 | * implicit dependency on udev */ | |
1115 | ||
1116 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_UDEVD_SERVICE, true, UNIT_DEPENDENCY_FILE); | |
1117 | if (r < 0) | |
1118 | return r; | |
1119 | } | |
1120 | ||
52c239d7 LB |
1121 | if (!IN_SET(c->std_output, |
1122 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1123 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
52c239d7 LB |
1124 | !IN_SET(c->std_error, |
1125 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1126 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
91dd5f7c | 1127 | !c->log_namespace) |
23a177ef LP |
1128 | return 0; |
1129 | ||
91dd5f7c LP |
1130 | /* If syslog or kernel logging is requested (or log namespacing is), make sure our own logging daemon |
1131 | * is run first. */ | |
1132 | ||
1133 | if (c->log_namespace) { | |
dc5437c7 | 1134 | _cleanup_free_ char *socket_unit = NULL, *varlink_socket_unit = NULL; |
23a177ef | 1135 | |
91dd5f7c LP |
1136 | r = unit_name_build_from_type("systemd-journald", c->log_namespace, UNIT_SOCKET, &socket_unit); |
1137 | if (r < 0) | |
1138 | return r; | |
1139 | ||
1140 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, socket_unit, true, UNIT_DEPENDENCY_FILE); | |
1141 | if (r < 0) | |
1142 | return r; | |
dc5437c7 LP |
1143 | |
1144 | r = unit_name_build_from_type("systemd-journald-varlink", c->log_namespace, UNIT_SOCKET, &varlink_socket_unit); | |
1145 | if (r < 0) | |
1146 | return r; | |
1147 | ||
1148 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, varlink_socket_unit, true, UNIT_DEPENDENCY_FILE); | |
1149 | if (r < 0) | |
1150 | return r; | |
91dd5f7c LP |
1151 | } else |
1152 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, true, UNIT_DEPENDENCY_FILE); | |
b46a529c LP |
1153 | if (r < 0) |
1154 | return r; | |
23a177ef | 1155 | |
87f0e418 LP |
1156 | return 0; |
1157 | } | |
1158 | ||
87f0e418 LP |
1159 | const char *unit_description(Unit *u) { |
1160 | assert(u); | |
1161 | ||
ac155bb8 MS |
1162 | if (u->description) |
1163 | return u->description; | |
87f0e418 | 1164 | |
ac155bb8 | 1165 | return strna(u->id); |
87f0e418 LP |
1166 | } |
1167 | ||
2a8f53c6 ZJS |
1168 | const char *unit_status_string(Unit *u) { |
1169 | assert(u); | |
1170 | ||
1171 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_NAME && u->id) | |
1172 | return u->id; | |
1173 | ||
1174 | return unit_description(u); | |
1175 | } | |
1176 | ||
eef85c4a LP |
1177 | static void print_unit_dependency_mask(FILE *f, const char *kind, UnitDependencyMask mask, bool *space) { |
1178 | const struct { | |
1179 | UnitDependencyMask mask; | |
1180 | const char *name; | |
1181 | } table[] = { | |
1182 | { UNIT_DEPENDENCY_FILE, "file" }, | |
1183 | { UNIT_DEPENDENCY_IMPLICIT, "implicit" }, | |
1184 | { UNIT_DEPENDENCY_DEFAULT, "default" }, | |
1185 | { UNIT_DEPENDENCY_UDEV, "udev" }, | |
1186 | { UNIT_DEPENDENCY_PATH, "path" }, | |
1187 | { UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT, "mountinfo-implicit" }, | |
1188 | { UNIT_DEPENDENCY_MOUNTINFO_DEFAULT, "mountinfo-default" }, | |
1189 | { UNIT_DEPENDENCY_PROC_SWAP, "proc-swap" }, | |
1190 | }; | |
1191 | size_t i; | |
1192 | ||
1193 | assert(f); | |
1194 | assert(kind); | |
1195 | assert(space); | |
1196 | ||
1197 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
1198 | ||
1199 | if (mask == 0) | |
1200 | break; | |
1201 | ||
d94a24ca | 1202 | if (FLAGS_SET(mask, table[i].mask)) { |
eef85c4a LP |
1203 | if (*space) |
1204 | fputc(' ', f); | |
1205 | else | |
1206 | *space = true; | |
1207 | ||
1208 | fputs(kind, f); | |
1209 | fputs("-", f); | |
1210 | fputs(table[i].name, f); | |
1211 | ||
1212 | mask &= ~table[i].mask; | |
1213 | } | |
1214 | } | |
1215 | ||
1216 | assert(mask == 0); | |
1217 | } | |
1218 | ||
87f0e418 | 1219 | void unit_dump(Unit *u, FILE *f, const char *prefix) { |
49dbfa7b | 1220 | char *t, **j; |
87f0e418 | 1221 | Iterator i; |
47be870b | 1222 | const char *prefix2; |
8d5e5931 | 1223 | char timestamp[5][FORMAT_TIMESTAMP_MAX], timespan[FORMAT_TIMESPAN_MAX]; |
a7f241db | 1224 | Unit *following; |
eeaedb7c | 1225 | _cleanup_set_free_ Set *following_set = NULL; |
05a98afd | 1226 | const char *n; |
02638280 LP |
1227 | CGroupMask m; |
1228 | int r; | |
87f0e418 LP |
1229 | |
1230 | assert(u); | |
ac155bb8 | 1231 | assert(u->type >= 0); |
87f0e418 | 1232 | |
4c940960 | 1233 | prefix = strempty(prefix); |
63c372cb | 1234 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
1235 | |
1236 | fprintf(f, | |
0121d1f2 ZJS |
1237 | "%s-> Unit %s:\n", |
1238 | prefix, u->id); | |
1239 | ||
4562c355 ZJS |
1240 | SET_FOREACH(t, u->aliases, i) |
1241 | fprintf(f, "%s\tAlias: %s\n", prefix, t); | |
0121d1f2 ZJS |
1242 | |
1243 | fprintf(f, | |
87f0e418 | 1244 | "%s\tDescription: %s\n" |
9e2f7c11 | 1245 | "%s\tInstance: %s\n" |
87f0e418 | 1246 | "%s\tUnit Load State: %s\n" |
2fad8195 | 1247 | "%s\tUnit Active State: %s\n" |
b895d155 | 1248 | "%s\tState Change Timestamp: %s\n" |
173e3821 | 1249 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 1250 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 1251 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 1252 | "%s\tInactive Enter Timestamp: %s\n" |
f2f725e5 | 1253 | "%s\tMay GC: %s\n" |
9444b1f2 | 1254 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 1255 | "%s\tTransient: %s\n" |
f5869324 | 1256 | "%s\tPerpetual: %s\n" |
5afe510c | 1257 | "%s\tGarbage Collection Mode: %s\n" |
4ad49000 LP |
1258 | "%s\tSlice: %s\n" |
1259 | "%s\tCGroup: %s\n" | |
aae7e17f | 1260 | "%s\tCGroup realized: %s\n", |
87f0e418 | 1261 | prefix, unit_description(u), |
ac155bb8 MS |
1262 | prefix, strna(u->instance), |
1263 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 1264 | prefix, unit_active_state_to_string(unit_active_state(u)), |
8d5e5931 ZJS |
1265 | prefix, strna(format_timestamp(timestamp[0], sizeof(timestamp[0]), u->state_change_timestamp.realtime)), |
1266 | prefix, strna(format_timestamp(timestamp[1], sizeof(timestamp[1]), u->inactive_exit_timestamp.realtime)), | |
1267 | prefix, strna(format_timestamp(timestamp[2], sizeof(timestamp[2]), u->active_enter_timestamp.realtime)), | |
1268 | prefix, strna(format_timestamp(timestamp[3], sizeof(timestamp[3]), u->active_exit_timestamp.realtime)), | |
1269 | prefix, strna(format_timestamp(timestamp[4], sizeof(timestamp[4]), u->inactive_enter_timestamp.realtime)), | |
f2f725e5 | 1270 | prefix, yes_no(unit_may_gc(u)), |
9444b1f2 | 1271 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 1272 | prefix, yes_no(u->transient), |
f5869324 | 1273 | prefix, yes_no(u->perpetual), |
5afe510c | 1274 | prefix, collect_mode_to_string(u->collect_mode), |
4ad49000 LP |
1275 | prefix, strna(unit_slice_name(u)), |
1276 | prefix, strna(u->cgroup_path), | |
aae7e17f FB |
1277 | prefix, yes_no(u->cgroup_realized)); |
1278 | ||
1279 | if (u->cgroup_realized_mask != 0) { | |
1280 | _cleanup_free_ char *s = NULL; | |
1281 | (void) cg_mask_to_string(u->cgroup_realized_mask, &s); | |
02638280 LP |
1282 | fprintf(f, "%s\tCGroup realized mask: %s\n", prefix, strnull(s)); |
1283 | } | |
0adf88b6 | 1284 | |
02638280 LP |
1285 | if (u->cgroup_enabled_mask != 0) { |
1286 | _cleanup_free_ char *s = NULL; | |
1287 | (void) cg_mask_to_string(u->cgroup_enabled_mask, &s); | |
1288 | fprintf(f, "%s\tCGroup enabled mask: %s\n", prefix, strnull(s)); | |
1289 | } | |
0adf88b6 | 1290 | |
02638280 LP |
1291 | m = unit_get_own_mask(u); |
1292 | if (m != 0) { | |
1293 | _cleanup_free_ char *s = NULL; | |
1294 | (void) cg_mask_to_string(m, &s); | |
1295 | fprintf(f, "%s\tCGroup own mask: %s\n", prefix, strnull(s)); | |
aae7e17f | 1296 | } |
0adf88b6 | 1297 | |
02638280 LP |
1298 | m = unit_get_members_mask(u); |
1299 | if (m != 0) { | |
aae7e17f | 1300 | _cleanup_free_ char *s = NULL; |
02638280 | 1301 | (void) cg_mask_to_string(m, &s); |
aae7e17f FB |
1302 | fprintf(f, "%s\tCGroup members mask: %s\n", prefix, strnull(s)); |
1303 | } | |
0301abf4 | 1304 | |
0adf88b6 LP |
1305 | m = unit_get_delegate_mask(u); |
1306 | if (m != 0) { | |
1307 | _cleanup_free_ char *s = NULL; | |
1308 | (void) cg_mask_to_string(m, &s); | |
1309 | fprintf(f, "%s\tCGroup delegate mask: %s\n", prefix, strnull(s)); | |
1310 | } | |
1311 | ||
4b58153d LP |
1312 | if (!sd_id128_is_null(u->invocation_id)) |
1313 | fprintf(f, "%s\tInvocation ID: " SD_ID128_FORMAT_STR "\n", | |
1314 | prefix, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
1315 | ||
49dbfa7b LP |
1316 | STRV_FOREACH(j, u->documentation) |
1317 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
1318 | ||
eeaedb7c LP |
1319 | following = unit_following(u); |
1320 | if (following) | |
ac155bb8 | 1321 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 1322 | |
eeaedb7c LP |
1323 | r = unit_following_set(u, &following_set); |
1324 | if (r >= 0) { | |
1325 | Unit *other; | |
1326 | ||
1327 | SET_FOREACH(other, following_set, i) | |
1328 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
1329 | } | |
1330 | ||
ac155bb8 MS |
1331 | if (u->fragment_path) |
1332 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 1333 | |
1b64d026 LP |
1334 | if (u->source_path) |
1335 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
1336 | ||
ae7a7182 | 1337 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 1338 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 1339 | |
e7dfbb4e LP |
1340 | if (u->failure_action != EMERGENCY_ACTION_NONE) |
1341 | fprintf(f, "%s\tFailure Action: %s\n", prefix, emergency_action_to_string(u->failure_action)); | |
7af67e9a LP |
1342 | if (u->failure_action_exit_status >= 0) |
1343 | fprintf(f, "%s\tFailure Action Exit Status: %i\n", prefix, u->failure_action_exit_status); | |
e7dfbb4e LP |
1344 | if (u->success_action != EMERGENCY_ACTION_NONE) |
1345 | fprintf(f, "%s\tSuccess Action: %s\n", prefix, emergency_action_to_string(u->success_action)); | |
7af67e9a LP |
1346 | if (u->success_action_exit_status >= 0) |
1347 | fprintf(f, "%s\tSuccess Action Exit Status: %i\n", prefix, u->success_action_exit_status); | |
e7dfbb4e | 1348 | |
36c16a7c | 1349 | if (u->job_timeout != USEC_INFINITY) |
2fa4092c | 1350 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 1351 | |
87a47f99 LN |
1352 | if (u->job_timeout_action != EMERGENCY_ACTION_NONE) |
1353 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, emergency_action_to_string(u->job_timeout_action)); | |
f189ab18 LP |
1354 | |
1355 | if (u->job_timeout_reboot_arg) | |
1356 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
1357 | ||
59fccdc5 LP |
1358 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
1359 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 1360 | |
ac155bb8 | 1361 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
1362 | fprintf(f, |
1363 | "%s\tCondition Timestamp: %s\n" | |
1364 | "%s\tCondition Result: %s\n", | |
8d5e5931 | 1365 | prefix, strna(format_timestamp(timestamp[0], sizeof(timestamp[0]), u->condition_timestamp.realtime)), |
ac155bb8 | 1366 | prefix, yes_no(u->condition_result)); |
2791a8f8 | 1367 | |
59fccdc5 LP |
1368 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
1369 | fprintf(f, | |
1370 | "%s\tAssert Timestamp: %s\n" | |
1371 | "%s\tAssert Result: %s\n", | |
8d5e5931 | 1372 | prefix, strna(format_timestamp(timestamp[0], sizeof(timestamp[0]), u->assert_timestamp.realtime)), |
59fccdc5 LP |
1373 | prefix, yes_no(u->assert_result)); |
1374 | ||
f6173cb9 | 1375 | for (UnitDependency d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
eef85c4a | 1376 | UnitDependencyInfo di; |
87f0e418 LP |
1377 | Unit *other; |
1378 | ||
eef85c4a LP |
1379 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { |
1380 | bool space = false; | |
1381 | ||
1382 | fprintf(f, "%s\t%s: %s (", prefix, unit_dependency_to_string(d), other->id); | |
1383 | ||
1384 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); | |
1385 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1386 | ||
1387 | fputs(")\n", f); | |
1388 | } | |
87f0e418 LP |
1389 | } |
1390 | ||
eef85c4a LP |
1391 | if (!hashmap_isempty(u->requires_mounts_for)) { |
1392 | UnitDependencyInfo di; | |
1393 | const char *path; | |
1394 | ||
1395 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { | |
1396 | bool space = false; | |
7c8fa05c | 1397 | |
eef85c4a | 1398 | fprintf(f, "%s\tRequiresMountsFor: %s (", prefix, path); |
7c8fa05c | 1399 | |
eef85c4a LP |
1400 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); |
1401 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1402 | ||
1403 | fputs(")\n", f); | |
1404 | } | |
7c8fa05c LP |
1405 | } |
1406 | ||
ac155bb8 | 1407 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 1408 | |
b0650475 | 1409 | fprintf(f, |
a40eb732 | 1410 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
1411 | "%s\tRefuseManualStart: %s\n" |
1412 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 1413 | "%s\tDefaultDependencies: %s\n" |
d420282b | 1414 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1415 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1416 | prefix, yes_no(u->stop_when_unneeded), |
1417 | prefix, yes_no(u->refuse_manual_start), | |
1418 | prefix, yes_no(u->refuse_manual_stop), | |
1419 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1420 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1421 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 1422 | |
23a177ef LP |
1423 | if (UNIT_VTABLE(u)->dump) |
1424 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1425 | |
ac155bb8 | 1426 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1427 | fprintf(f, |
1428 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1429 | prefix, u->merged_into->id); |
1430 | else if (u->load_state == UNIT_ERROR) | |
4bbccb02 | 1431 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror_safe(u->load_error)); |
8821a00f | 1432 | |
05a98afd LP |
1433 | for (n = sd_bus_track_first(u->bus_track); n; n = sd_bus_track_next(u->bus_track)) |
1434 | fprintf(f, "%s\tBus Ref: %s\n", prefix, n); | |
87f0e418 | 1435 | |
ac155bb8 MS |
1436 | if (u->job) |
1437 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1438 | |
e0209d83 MS |
1439 | if (u->nop_job) |
1440 | job_dump(u->nop_job, f, prefix2); | |
87f0e418 LP |
1441 | } |
1442 | ||
1443 | /* Common implementation for multiple backends */ | |
c3620770 | 1444 | int unit_load_fragment_and_dropin(Unit *u, bool fragment_required) { |
23a177ef LP |
1445 | int r; |
1446 | ||
1447 | assert(u); | |
23a177ef | 1448 | |
e48614c4 | 1449 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1450 | r = unit_load_fragment(u); |
1451 | if (r < 0) | |
23a177ef LP |
1452 | return r; |
1453 | ||
c3620770 ZJS |
1454 | if (u->load_state == UNIT_STUB) { |
1455 | if (fragment_required) | |
1456 | return -ENOENT; | |
1457 | ||
1458 | u->load_state = UNIT_LOADED; | |
1459 | } | |
23a177ef | 1460 | |
9e4ea9cc ZJS |
1461 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1462 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1463 | * been loaded and which not, at least without doing complicated book-keeping, | |
1464 | * so let's always reread all drop-ins. */ | |
c9e06956 ZJS |
1465 | r = unit_load_dropin(unit_follow_merge(u)); |
1466 | if (r < 0) | |
1467 | return r; | |
1468 | ||
1469 | if (u->source_path) { | |
1470 | struct stat st; | |
1471 | ||
1472 | if (stat(u->source_path, &st) >= 0) | |
1473 | u->source_mtime = timespec_load(&st.st_mtim); | |
1474 | else | |
1475 | u->source_mtime = 0; | |
1476 | } | |
1477 | ||
1478 | return 0; | |
23a177ef LP |
1479 | } |
1480 | ||
19496554 MS |
1481 | void unit_add_to_target_deps_queue(Unit *u) { |
1482 | Manager *m = u->manager; | |
1483 | ||
1484 | assert(u); | |
1485 | ||
1486 | if (u->in_target_deps_queue) | |
1487 | return; | |
1488 | ||
1489 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1490 | u->in_target_deps_queue = true; | |
1491 | } | |
1492 | ||
bba34eed | 1493 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1494 | assert(u); |
1495 | assert(target); | |
1496 | ||
ac155bb8 | 1497 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1498 | return 0; |
1499 | ||
35b8ca3a | 1500 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1501 | * that loop check below is reliable */ |
ac155bb8 MS |
1502 | if (u->load_state != UNIT_LOADED || |
1503 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1504 | return 0; |
1505 | ||
21256a2b LP |
1506 | /* If either side wants no automatic dependencies, then let's |
1507 | * skip this */ | |
ac155bb8 MS |
1508 | if (!u->default_dependencies || |
1509 | !target->default_dependencies) | |
21256a2b LP |
1510 | return 0; |
1511 | ||
98bc2000 | 1512 | /* Don't create loops */ |
eef85c4a | 1513 | if (hashmap_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1514 | return 0; |
1515 | ||
eef85c4a | 1516 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1517 | } |
1518 | ||
e954c9cf LP |
1519 | static int unit_add_slice_dependencies(Unit *u) { |
1520 | assert(u); | |
b81884e7 | 1521 | |
35b7ff80 | 1522 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1523 | return 0; |
1524 | ||
eef85c4a LP |
1525 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1526 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1527 | relationship). */ | |
f6173cb9 | 1528 | UnitDependencyMask mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; |
eef85c4a | 1529 | |
e954c9cf | 1530 | if (UNIT_ISSET(u->slice)) |
eef85c4a | 1531 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true, mask); |
e954c9cf | 1532 | |
8c8da0e0 | 1533 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1534 | return 0; |
1535 | ||
5a724170 | 1536 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, true, mask); |
98bc2000 LP |
1537 | } |
1538 | ||
e954c9cf | 1539 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1540 | UnitDependencyInfo di; |
1541 | const char *path; | |
1542 | Iterator i; | |
9588bc32 LP |
1543 | int r; |
1544 | ||
1545 | assert(u); | |
1546 | ||
eef85c4a LP |
1547 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { |
1548 | char prefix[strlen(path) + 1]; | |
9588bc32 | 1549 | |
eef85c4a | 1550 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1551 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1552 | Unit *m; |
1553 | ||
c7c89abb | 1554 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1555 | if (r < 0) |
1556 | return r; | |
c7c89abb FB |
1557 | |
1558 | m = manager_get_unit(u->manager, p); | |
1559 | if (!m) { | |
1560 | /* Make sure to load the mount unit if | |
1561 | * it exists. If so the dependencies | |
1562 | * on this unit will be added later | |
1563 | * during the loading of the mount | |
1564 | * unit. */ | |
1565 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1566 | continue; |
c7c89abb | 1567 | } |
9588bc32 LP |
1568 | if (m == u) |
1569 | continue; | |
1570 | ||
1571 | if (m->load_state != UNIT_LOADED) | |
1572 | continue; | |
1573 | ||
eef85c4a | 1574 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1575 | if (r < 0) |
1576 | return r; | |
1577 | ||
1578 | if (m->fragment_path) { | |
eef85c4a | 1579 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1580 | if (r < 0) |
1581 | return r; | |
1582 | } | |
1583 | } | |
1584 | } | |
1585 | ||
1586 | return 0; | |
1587 | } | |
1588 | ||
95ae05c0 WC |
1589 | static int unit_add_startup_units(Unit *u) { |
1590 | CGroupContext *c; | |
95ae05c0 WC |
1591 | |
1592 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1593 | if (!c) |
1594 | return 0; | |
1595 | ||
d53d9474 | 1596 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1597 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1598 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1599 | return 0; |
1600 | ||
de7fef4b | 1601 | return set_ensure_put(&u->manager->startup_units, NULL, u); |
95ae05c0 WC |
1602 | } |
1603 | ||
87f0e418 LP |
1604 | int unit_load(Unit *u) { |
1605 | int r; | |
1606 | ||
1607 | assert(u); | |
1608 | ||
ac155bb8 | 1609 | if (u->in_load_queue) { |
71fda00f | 1610 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1611 | u->in_load_queue = false; |
87f0e418 LP |
1612 | } |
1613 | ||
ac155bb8 | 1614 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1615 | return -EINVAL; |
1616 | ||
ac155bb8 | 1617 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1618 | return 0; |
1619 | ||
4f4afc88 | 1620 | if (u->transient_file) { |
66fa4bdd LP |
1621 | /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup |
1622 | * is complete, hence let's synchronize the unit file we just wrote to disk. */ | |
1623 | ||
4f4afc88 LP |
1624 | r = fflush_and_check(u->transient_file); |
1625 | if (r < 0) | |
1626 | goto fail; | |
1627 | ||
50fb00b7 | 1628 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1629 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1630 | } |
1631 | ||
c3784a7d ZJS |
1632 | r = UNIT_VTABLE(u)->load(u); |
1633 | if (r < 0) | |
23a177ef | 1634 | goto fail; |
c3784a7d ZJS |
1635 | |
1636 | assert(u->load_state != UNIT_STUB); | |
23a177ef | 1637 | |
7c8fa05c | 1638 | if (u->load_state == UNIT_LOADED) { |
19496554 | 1639 | unit_add_to_target_deps_queue(u); |
e954c9cf LP |
1640 | |
1641 | r = unit_add_slice_dependencies(u); | |
1642 | if (r < 0) | |
1643 | goto fail; | |
c2756a68 | 1644 | |
e954c9cf | 1645 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1646 | if (r < 0) |
c2756a68 | 1647 | goto fail; |
7c8fa05c | 1648 | |
95ae05c0 WC |
1649 | r = unit_add_startup_units(u); |
1650 | if (r < 0) | |
1651 | goto fail; | |
1652 | ||
eef85c4a | 1653 | if (u->on_failure_job_mode == JOB_ISOLATE && hashmap_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1654 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
6f40aa45 | 1655 | r = -ENOEXEC; |
c2756a68 LP |
1656 | goto fail; |
1657 | } | |
bc432dc7 | 1658 | |
a2df3ea4 MK |
1659 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1660 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1661 | ||
5af88058 LP |
1662 | /* We finished loading, let's ensure our parents recalculate the members mask */ |
1663 | unit_invalidate_cgroup_members_masks(u); | |
f68319bb LP |
1664 | } |
1665 | ||
ac155bb8 | 1666 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1667 | |
1668 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1669 | unit_add_to_gc_queue(u); |
87f0e418 | 1670 | |
87f0e418 LP |
1671 | return 0; |
1672 | ||
1673 | fail: | |
81be2388 ZJS |
1674 | /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code |
1675 | * should hence return ENOEXEC to ensure units are placed in this state after loading. */ | |
c4555ad8 LP |
1676 | |
1677 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : | |
1678 | r == -ENOEXEC ? UNIT_BAD_SETTING : | |
1679 | UNIT_ERROR; | |
ac155bb8 | 1680 | u->load_error = r; |
c4555ad8 | 1681 | |
7233e91a | 1682 | /* Record the last time we tried to load the unit, so that if the cache gets updated between now |
81be2388 | 1683 | * and the next time an attempt is made to load this unit, we know we need to check again. */ |
7233e91a LB |
1684 | if (u->load_state == UNIT_NOT_FOUND) |
1685 | u->fragment_loadtime = now(CLOCK_REALTIME); | |
1686 | ||
c1e1601e | 1687 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1688 | unit_add_to_gc_queue(u); |
23a177ef | 1689 | |
c4555ad8 | 1690 | return log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
87f0e418 LP |
1691 | } |
1692 | ||
f9f88198 YW |
1693 | _printf_(7, 8) |
1694 | static int log_unit_internal(void *userdata, int level, int error, const char *file, int line, const char *func, const char *format, ...) { | |
1695 | Unit *u = userdata; | |
1696 | va_list ap; | |
1697 | int r; | |
49365733 | 1698 | |
f9f88198 YW |
1699 | va_start(ap, format); |
1700 | if (u) | |
1701 | r = log_object_internalv(level, error, file, line, func, | |
1702 | u->manager->unit_log_field, | |
1703 | u->id, | |
1704 | u->manager->invocation_log_field, | |
1705 | u->invocation_id_string, | |
1706 | format, ap); | |
1707 | else | |
1708 | r = log_internalv(level, error, file, line, func, format, ap); | |
1709 | va_end(ap); | |
49365733 | 1710 | |
f9f88198 | 1711 | return r; |
49365733 LP |
1712 | } |
1713 | ||
97a3f4ee | 1714 | static bool unit_test_condition(Unit *u) { |
a0b191b7 LP |
1715 | _cleanup_strv_free_ char **env = NULL; |
1716 | int r; | |
1717 | ||
90bbc946 LP |
1718 | assert(u); |
1719 | ||
ac155bb8 | 1720 | dual_timestamp_get(&u->condition_timestamp); |
90bbc946 | 1721 | |
a0b191b7 LP |
1722 | r = manager_get_effective_environment(u->manager, &env); |
1723 | if (r < 0) { | |
1724 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
1725 | u->condition_result = CONDITION_ERROR; | |
1726 | } else | |
1727 | u->condition_result = condition_test_list( | |
1728 | u->conditions, | |
1729 | env, | |
1730 | condition_type_to_string, | |
1731 | log_unit_internal, | |
1732 | u); | |
e18f8852 | 1733 | |
a0b191b7 | 1734 | unit_add_to_dbus_queue(u); |
ac155bb8 | 1735 | return u->condition_result; |
90bbc946 LP |
1736 | } |
1737 | ||
97a3f4ee | 1738 | static bool unit_test_assert(Unit *u) { |
a0b191b7 LP |
1739 | _cleanup_strv_free_ char **env = NULL; |
1740 | int r; | |
1741 | ||
59fccdc5 LP |
1742 | assert(u); |
1743 | ||
1744 | dual_timestamp_get(&u->assert_timestamp); | |
59fccdc5 | 1745 | |
a0b191b7 LP |
1746 | r = manager_get_effective_environment(u->manager, &env); |
1747 | if (r < 0) { | |
1748 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
1749 | u->assert_result = CONDITION_ERROR; | |
1750 | } else | |
1751 | u->assert_result = condition_test_list( | |
1752 | u->asserts, | |
1753 | env, | |
1754 | assert_type_to_string, | |
1755 | log_unit_internal, | |
1756 | u); | |
e18f8852 | 1757 | |
a0b191b7 | 1758 | unit_add_to_dbus_queue(u); |
59fccdc5 LP |
1759 | return u->assert_result; |
1760 | } | |
1761 | ||
5bcf34eb | 1762 | void unit_status_printf(Unit *u, StatusType status_type, const char *status, const char *unit_status_msg_format) { |
5b262f74 LP |
1763 | const char *d; |
1764 | ||
2a8f53c6 | 1765 | d = unit_status_string(u); |
5b262f74 LP |
1766 | if (log_get_show_color()) |
1767 | d = strjoina(ANSI_HIGHLIGHT, d, ANSI_NORMAL); | |
1768 | ||
df446f96 | 1769 | DISABLE_WARNING_FORMAT_NONLITERAL; |
5bcf34eb | 1770 | manager_status_printf(u->manager, status_type, status, unit_status_msg_format, d); |
df446f96 LP |
1771 | REENABLE_WARNING; |
1772 | } | |
1773 | ||
97a3f4ee | 1774 | int unit_test_start_limit(Unit *u) { |
429926e9 TR |
1775 | const char *reason; |
1776 | ||
6bf0f408 LP |
1777 | assert(u); |
1778 | ||
7bf081a1 | 1779 | if (ratelimit_below(&u->start_ratelimit)) { |
6bf0f408 LP |
1780 | u->start_limit_hit = false; |
1781 | return 0; | |
1782 | } | |
1783 | ||
1784 | log_unit_warning(u, "Start request repeated too quickly."); | |
1785 | u->start_limit_hit = true; | |
1786 | ||
429926e9 TR |
1787 | reason = strjoina("unit ", u->id, " failed"); |
1788 | ||
36c4dc08 LP |
1789 | emergency_action(u->manager, u->start_limit_action, |
1790 | EMERGENCY_ACTION_IS_WATCHDOG|EMERGENCY_ACTION_WARN, | |
1791 | u->reboot_arg, -1, reason); | |
1792 | ||
1793 | return -ECANCELED; | |
6bf0f408 LP |
1794 | } |
1795 | ||
c891efaf | 1796 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1797 | assert(u); |
c891efaf FB |
1798 | |
1799 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1800 | return false; | |
1801 | ||
1802 | /* For some reasons units remaining in the same process group | |
1803 | * as PID 1 fail to acquire the console even if it's not used | |
1804 | * by any process. So skip the confirmation question for them. */ | |
1805 | return !unit_get_exec_context(u)->same_pgrp; | |
1806 | } | |
1807 | ||
631b676b LP |
1808 | static bool unit_verify_deps(Unit *u) { |
1809 | Unit *other; | |
1810 | Iterator j; | |
eef85c4a | 1811 | void *v; |
631b676b LP |
1812 | |
1813 | assert(u); | |
1814 | ||
1815 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with | |
1816 | * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job | |
1817 | * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in | |
1818 | * conjunction with After= as for them any such check would make things entirely racy. */ | |
1819 | ||
eef85c4a | 1820 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], j) { |
631b676b | 1821 | |
eef85c4a | 1822 | if (!hashmap_contains(u->dependencies[UNIT_AFTER], other)) |
631b676b LP |
1823 | continue; |
1824 | ||
1825 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1826 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1827 | return false; | |
1828 | } | |
1829 | } | |
1830 | ||
1831 | return true; | |
1832 | } | |
1833 | ||
9adb6959 | 1834 | /* Errors that aren't really errors: |
6bf0f408 | 1835 | * -EALREADY: Unit is already started. |
9adb6959 | 1836 | * -ECOMM: Condition failed |
6bf0f408 | 1837 | * -EAGAIN: An operation is already in progress. Retry later. |
9adb6959 LP |
1838 | * |
1839 | * Errors that are real errors: | |
1840 | * -EBADR: This unit type does not support starting. | |
2de9b979 | 1841 | * -ECANCELED: Start limit hit, too many requests for now |
6bf0f408 LP |
1842 | * -EPROTO: Assert failed |
1843 | * -EINVAL: Unit not loaded | |
1844 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1845 | * -ENOLINK: The necessary dependencies are not fulfilled. |
d4fd1cf2 | 1846 | * -ESTALE: This unit has been started before and can't be started a second time |
a4191c9f | 1847 | * -ENOENT: This is a triggering unit and unit to trigger is not loaded |
87f0e418 LP |
1848 | */ |
1849 | int unit_start(Unit *u) { | |
1850 | UnitActiveState state; | |
92ab323c | 1851 | Unit *following; |
87f0e418 LP |
1852 | |
1853 | assert(u); | |
1854 | ||
5766aca8 LP |
1855 | /* If this is already started, then this will succeed. Note that this will even succeed if this unit |
1856 | * is not startable by the user. This is relied on to detect when we need to wait for units and when | |
1857 | * waiting is finished. */ | |
87f0e418 LP |
1858 | state = unit_active_state(u); |
1859 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1860 | return -EALREADY; | |
380dc8b0 LP |
1861 | if (state == UNIT_MAINTENANCE) |
1862 | return -EAGAIN; | |
87f0e418 | 1863 | |
6bf0f408 LP |
1864 | /* Units that aren't loaded cannot be started */ |
1865 | if (u->load_state != UNIT_LOADED) | |
1866 | return -EINVAL; | |
1867 | ||
d4fd1cf2 LP |
1868 | /* Refuse starting scope units more than once */ |
1869 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1870 | return -ESTALE; | |
1871 | ||
5766aca8 LP |
1872 | /* If the conditions failed, don't do anything at all. If we already are activating this call might |
1873 | * still be useful to speed up activation in case there is some hold-off time, but we don't want to | |
1874 | * recheck the condition in that case. */ | |
a82e5507 | 1875 | if (state != UNIT_ACTIVATING && |
5af6aa58 | 1876 | !unit_test_condition(u)) |
5766aca8 | 1877 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(ECOMM), "Starting requested but condition failed. Not starting unit."); |
52661efd | 1878 | |
59fccdc5 LP |
1879 | /* If the asserts failed, fail the entire job */ |
1880 | if (state != UNIT_ACTIVATING && | |
5766aca8 LP |
1881 | !unit_test_assert(u)) |
1882 | return log_unit_notice_errno(u, SYNTHETIC_ERRNO(EPROTO), "Starting requested but asserts failed."); | |
59fccdc5 | 1883 | |
5766aca8 LP |
1884 | /* Units of types that aren't supported cannot be started. Note that we do this test only after the |
1885 | * condition checks, so that we rather return condition check errors (which are usually not | |
1886 | * considered a true failure) than "not supported" errors (which are considered a failure). | |
d11a7645 | 1887 | */ |
96cf3ec9 | 1888 | if (!unit_type_supported(u->type)) |
d11a7645 LP |
1889 | return -EOPNOTSUPP; |
1890 | ||
5766aca8 LP |
1891 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine |
1892 | * should have taken care of this already, but let's check this here again. After all, our | |
1893 | * dependencies might not be in effect anymore, due to a reload or due to a failed condition. */ | |
631b676b LP |
1894 | if (!unit_verify_deps(u)) |
1895 | return -ENOLINK; | |
1896 | ||
92ab323c | 1897 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1898 | following = unit_following(u); |
1899 | if (following) { | |
f2341e0a | 1900 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1901 | return unit_start(following); |
1902 | } | |
1903 | ||
1904 | /* If it is stopped, but we cannot start it, then fail */ | |
1905 | if (!UNIT_VTABLE(u)->start) | |
1906 | return -EBADR; | |
1907 | ||
5766aca8 LP |
1908 | /* We don't suppress calls to ->start() here when we are already starting, to allow this request to |
1909 | * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it | |
1910 | * waits for a holdoff timer to elapse before it will start again. */ | |
87f0e418 | 1911 | |
c1e1601e | 1912 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 1913 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 1914 | |
d1a34ae9 | 1915 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1916 | } |
1917 | ||
1918 | bool unit_can_start(Unit *u) { | |
1919 | assert(u); | |
1920 | ||
8ff4d2ab LP |
1921 | if (u->load_state != UNIT_LOADED) |
1922 | return false; | |
1923 | ||
96cf3ec9 | 1924 | if (!unit_type_supported(u->type)) |
8ff4d2ab LP |
1925 | return false; |
1926 | ||
d4fd1cf2 LP |
1927 | /* Scope units may be started only once */ |
1928 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
1929 | return false; | |
1930 | ||
87f0e418 LP |
1931 | return !!UNIT_VTABLE(u)->start; |
1932 | } | |
1933 | ||
2528a7a6 LP |
1934 | bool unit_can_isolate(Unit *u) { |
1935 | assert(u); | |
1936 | ||
1937 | return unit_can_start(u) && | |
ac155bb8 | 1938 | u->allow_isolate; |
2528a7a6 LP |
1939 | } |
1940 | ||
87f0e418 LP |
1941 | /* Errors: |
1942 | * -EBADR: This unit type does not support stopping. | |
1943 | * -EALREADY: Unit is already stopped. | |
1944 | * -EAGAIN: An operation is already in progress. Retry later. | |
1945 | */ | |
1946 | int unit_stop(Unit *u) { | |
1947 | UnitActiveState state; | |
92ab323c | 1948 | Unit *following; |
87f0e418 LP |
1949 | |
1950 | assert(u); | |
1951 | ||
87f0e418 | 1952 | state = unit_active_state(u); |
fdf20a31 | 1953 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1954 | return -EALREADY; |
1955 | ||
0faacd47 LP |
1956 | following = unit_following(u); |
1957 | if (following) { | |
f2341e0a | 1958 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1959 | return unit_stop(following); |
1960 | } | |
1961 | ||
7898b0cf LP |
1962 | if (!UNIT_VTABLE(u)->stop) |
1963 | return -EBADR; | |
1964 | ||
c1e1601e | 1965 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 1966 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 1967 | |
d1a34ae9 | 1968 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1969 | } |
1970 | ||
f5869324 LP |
1971 | bool unit_can_stop(Unit *u) { |
1972 | assert(u); | |
1973 | ||
96cf3ec9 | 1974 | if (!unit_type_supported(u->type)) |
f5869324 LP |
1975 | return false; |
1976 | ||
1977 | if (u->perpetual) | |
1978 | return false; | |
1979 | ||
1980 | return !!UNIT_VTABLE(u)->stop; | |
1981 | } | |
1982 | ||
87f0e418 LP |
1983 | /* Errors: |
1984 | * -EBADR: This unit type does not support reloading. | |
1985 | * -ENOEXEC: Unit is not started. | |
1986 | * -EAGAIN: An operation is already in progress. Retry later. | |
1987 | */ | |
1988 | int unit_reload(Unit *u) { | |
1989 | UnitActiveState state; | |
92ab323c | 1990 | Unit *following; |
87f0e418 LP |
1991 | |
1992 | assert(u); | |
1993 | ||
ac155bb8 | 1994 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1995 | return -EINVAL; |
1996 | ||
87f0e418 LP |
1997 | if (!unit_can_reload(u)) |
1998 | return -EBADR; | |
1999 | ||
2000 | state = unit_active_state(u); | |
e364ad06 | 2001 | if (state == UNIT_RELOADING) |
6255af75 | 2002 | return -EAGAIN; |
87f0e418 | 2003 | |
6a371e23 | 2004 | if (state != UNIT_ACTIVE) { |
f2341e0a | 2005 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 2006 | return -ENOEXEC; |
6a371e23 | 2007 | } |
87f0e418 | 2008 | |
e48614c4 ZJS |
2009 | following = unit_following(u); |
2010 | if (following) { | |
f2341e0a | 2011 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
2012 | return unit_reload(following); |
2013 | } | |
2014 | ||
c1e1601e | 2015 | unit_add_to_dbus_queue(u); |
82a2b6bb | 2016 | |
f54bcca5 JR |
2017 | if (!UNIT_VTABLE(u)->reload) { |
2018 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
2ad2e41a | 2019 | unit_notify(u, unit_active_state(u), unit_active_state(u), 0); |
f54bcca5 JR |
2020 | return 0; |
2021 | } | |
2022 | ||
d9e45bc3 MS |
2023 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
2024 | ||
d1a34ae9 | 2025 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
2026 | } |
2027 | ||
2028 | bool unit_can_reload(Unit *u) { | |
2029 | assert(u); | |
2030 | ||
f54bcca5 JR |
2031 | if (UNIT_VTABLE(u)->can_reload) |
2032 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 2033 | |
eef85c4a | 2034 | if (!hashmap_isempty(u->dependencies[UNIT_PROPAGATES_RELOAD_TO])) |
87f0e418 LP |
2035 | return true; |
2036 | ||
f54bcca5 | 2037 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
2038 | } |
2039 | ||
a3c1168a LP |
2040 | bool unit_is_unneeded(Unit *u) { |
2041 | static const UnitDependency deps[] = { | |
be7d9ff7 | 2042 | UNIT_REQUIRED_BY, |
084918ba | 2043 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
2044 | UNIT_WANTED_BY, |
2045 | UNIT_BOUND_BY, | |
2046 | }; | |
a3c1168a | 2047 | size_t j; |
f3bff0eb LP |
2048 | |
2049 | assert(u); | |
2050 | ||
ac155bb8 | 2051 | if (!u->stop_when_unneeded) |
a3c1168a | 2052 | return false; |
f3bff0eb | 2053 | |
a3c1168a LP |
2054 | /* Don't clean up while the unit is transitioning or is even inactive. */ |
2055 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
2056 | return false; | |
2057 | if (u->job) | |
2058 | return false; | |
f3bff0eb | 2059 | |
a3c1168a | 2060 | for (j = 0; j < ELEMENTSOF(deps); j++) { |
eef85c4a LP |
2061 | Unit *other; |
2062 | Iterator i; | |
2063 | void *v; | |
2064 | ||
fda09318 | 2065 | /* If a dependent unit has a job queued, is active or transitioning, or is marked for |
a3c1168a | 2066 | * restart, then don't clean this one up. */ |
b81884e7 | 2067 | |
a3c1168a | 2068 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[deps[j]], i) { |
93d4cb09 | 2069 | if (other->job) |
a3c1168a LP |
2070 | return false; |
2071 | ||
2072 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
2073 | return false; | |
2074 | ||
2075 | if (unit_will_restart(other)) | |
2076 | return false; | |
2077 | } | |
bea355da LP |
2078 | } |
2079 | ||
a3c1168a LP |
2080 | return true; |
2081 | } | |
f3bff0eb | 2082 | |
a3c1168a LP |
2083 | static void check_unneeded_dependencies(Unit *u) { |
2084 | ||
2085 | static const UnitDependency deps[] = { | |
2086 | UNIT_REQUIRES, | |
2087 | UNIT_REQUISITE, | |
2088 | UNIT_WANTS, | |
2089 | UNIT_BINDS_TO, | |
2090 | }; | |
2091 | size_t j; | |
2092 | ||
2093 | assert(u); | |
2094 | ||
2095 | /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */ | |
2096 | ||
2097 | for (j = 0; j < ELEMENTSOF(deps); j++) { | |
2098 | Unit *other; | |
2099 | Iterator i; | |
2100 | void *v; | |
2101 | ||
2102 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[deps[j]], i) | |
fda09318 | 2103 | unit_submit_to_stop_when_unneeded_queue(other); |
a3c1168a | 2104 | } |
f3bff0eb LP |
2105 | } |
2106 | ||
ff502445 | 2107 | static void unit_check_binds_to(Unit *u) { |
4afd3348 | 2108 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
ff502445 LP |
2109 | bool stop = false; |
2110 | Unit *other; | |
2111 | Iterator i; | |
eef85c4a | 2112 | void *v; |
67bfdc97 | 2113 | int r; |
ff502445 LP |
2114 | |
2115 | assert(u); | |
2116 | ||
2117 | if (u->job) | |
2118 | return; | |
2119 | ||
2120 | if (unit_active_state(u) != UNIT_ACTIVE) | |
2121 | return; | |
2122 | ||
eef85c4a | 2123 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) { |
ff502445 LP |
2124 | if (other->job) |
2125 | continue; | |
13ddc3fc ZJS |
2126 | |
2127 | if (!other->coldplugged) | |
2128 | /* We might yet create a job for the other unit… */ | |
2129 | continue; | |
ff502445 LP |
2130 | |
2131 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
2132 | continue; | |
2133 | ||
2134 | stop = true; | |
98f738b6 | 2135 | break; |
ff502445 LP |
2136 | } |
2137 | ||
2138 | if (!stop) | |
2139 | return; | |
2140 | ||
595bfe7d | 2141 | /* If stopping a unit fails continuously we might enter a stop |
67bfdc97 LP |
2142 | * loop here, hence stop acting on the service being |
2143 | * unnecessary after a while. */ | |
7994ac1d | 2144 | if (!ratelimit_below(&u->auto_stop_ratelimit)) { |
67bfdc97 LP |
2145 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); |
2146 | return; | |
2147 | } | |
2148 | ||
98f738b6 | 2149 | assert(other); |
f2341e0a | 2150 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
2151 | |
2152 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
50cbaba4 | 2153 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, NULL, &error, NULL); |
67bfdc97 | 2154 | if (r < 0) |
4bd29fe5 | 2155 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
ff502445 LP |
2156 | } |
2157 | ||
87f0e418 LP |
2158 | static void retroactively_start_dependencies(Unit *u) { |
2159 | Iterator i; | |
2160 | Unit *other; | |
eef85c4a | 2161 | void *v; |
87f0e418 LP |
2162 | |
2163 | assert(u); | |
2164 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2165 | ||
eef85c4a LP |
2166 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUIRES], i) |
2167 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2168 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2169 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
b81884e7 | 2170 | |
eef85c4a LP |
2171 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) |
2172 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2173 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2174 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
87f0e418 | 2175 | |
eef85c4a LP |
2176 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_WANTS], i) |
2177 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2178 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2179 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL, NULL); |
87f0e418 | 2180 | |
eef85c4a | 2181 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 2182 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2183 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
69dd2852 | 2184 | |
eef85c4a | 2185 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 2186 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2187 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
87f0e418 LP |
2188 | } |
2189 | ||
2190 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 | 2191 | Unit *other; |
eef85c4a LP |
2192 | Iterator i; |
2193 | void *v; | |
87f0e418 LP |
2194 | |
2195 | assert(u); | |
2196 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2197 | ||
b81884e7 | 2198 | /* Pull down units which are bound to us recursively if enabled */ |
eef85c4a | 2199 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 2200 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2201 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
cd0504d0 MS |
2202 | } |
2203 | ||
3ecaa09b | 2204 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
2205 | Unit *other; |
2206 | Iterator i; | |
eef85c4a | 2207 | void *v; |
7f66b026 | 2208 | int r; |
c0daa706 LP |
2209 | |
2210 | assert(u); | |
2211 | ||
eef85c4a | 2212 | if (hashmap_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
2213 | return; |
2214 | ||
f2341e0a | 2215 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 2216 | |
eef85c4a | 2217 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_ON_FAILURE], i) { |
7f66b026 | 2218 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
222ae6a8 | 2219 | |
50cbaba4 | 2220 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, NULL, &error, NULL); |
c1b6628d | 2221 | if (r < 0) |
7f66b026 | 2222 | log_unit_warning_errno(u, r, "Failed to enqueue OnFailure= job, ignoring: %s", bus_error_message(&error, r)); |
222ae6a8 | 2223 | } |
c0daa706 LP |
2224 | } |
2225 | ||
3ecaa09b LP |
2226 | void unit_trigger_notify(Unit *u) { |
2227 | Unit *other; | |
2228 | Iterator i; | |
eef85c4a | 2229 | void *v; |
3ecaa09b LP |
2230 | |
2231 | assert(u); | |
2232 | ||
eef85c4a | 2233 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_TRIGGERED_BY], i) |
3ecaa09b LP |
2234 | if (UNIT_VTABLE(other)->trigger_notify) |
2235 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2236 | } | |
2237 | ||
37109b85 ZJS |
2238 | static int raise_level(int log_level, bool condition_info, bool condition_notice) { |
2239 | if (condition_notice && log_level > LOG_NOTICE) | |
2240 | return LOG_NOTICE; | |
2241 | if (condition_info && log_level > LOG_INFO) | |
2242 | return LOG_INFO; | |
2243 | return log_level; | |
2244 | } | |
2245 | ||
915b1d01 | 2246 | static int unit_log_resources(Unit *u) { |
bc40a20e LP |
2247 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + _CGROUP_IO_ACCOUNTING_METRIC_MAX + 4]; |
2248 | bool any_traffic = false, have_ip_accounting = false, any_io = false, have_io_accounting = false; | |
2249 | _cleanup_free_ char *igress = NULL, *egress = NULL, *rr = NULL, *wr = NULL; | |
162392b7 | 2250 | int log_level = LOG_DEBUG; /* May be raised if resources consumed over a threshold */ |
915b1d01 | 2251 | size_t n_message_parts = 0, n_iovec = 0; |
bc40a20e | 2252 | char* message_parts[1 + 2 + 2 + 1], *t; |
915b1d01 LP |
2253 | nsec_t nsec = NSEC_INFINITY; |
2254 | CGroupIPAccountingMetric m; | |
2255 | size_t i; | |
2256 | int r; | |
2257 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2258 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2259 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2260 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2261 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2262 | }; | |
bc40a20e LP |
2263 | const char* const io_fields[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
2264 | [CGROUP_IO_READ_BYTES] = "IO_METRIC_READ_BYTES", | |
2265 | [CGROUP_IO_WRITE_BYTES] = "IO_METRIC_WRITE_BYTES", | |
2266 | [CGROUP_IO_READ_OPERATIONS] = "IO_METRIC_READ_OPERATIONS", | |
2267 | [CGROUP_IO_WRITE_OPERATIONS] = "IO_METRIC_WRITE_OPERATIONS", | |
2268 | }; | |
915b1d01 LP |
2269 | |
2270 | assert(u); | |
2271 | ||
2272 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2273 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2274 | * information and the complete data in structured fields. */ | |
2275 | ||
2276 | (void) unit_get_cpu_usage(u, &nsec); | |
2277 | if (nsec != NSEC_INFINITY) { | |
2278 | char buf[FORMAT_TIMESPAN_MAX] = ""; | |
2279 | ||
2280 | /* Format the CPU time for inclusion in the structured log message */ | |
2281 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2282 | r = log_oom(); | |
2283 | goto finish; | |
2284 | } | |
2285 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2286 | ||
2287 | /* Format the CPU time for inclusion in the human language message string */ | |
2288 | format_timespan(buf, sizeof(buf), nsec / NSEC_PER_USEC, USEC_PER_MSEC); | |
ec9d636b | 2289 | t = strjoin("consumed ", buf, " CPU time"); |
915b1d01 LP |
2290 | if (!t) { |
2291 | r = log_oom(); | |
2292 | goto finish; | |
2293 | } | |
2294 | ||
2295 | message_parts[n_message_parts++] = t; | |
37109b85 ZJS |
2296 | |
2297 | log_level = raise_level(log_level, | |
2298 | nsec > NOTICEWORTHY_CPU_NSEC, | |
2299 | nsec > MENTIONWORTHY_CPU_NSEC); | |
915b1d01 LP |
2300 | } |
2301 | ||
bc40a20e LP |
2302 | for (CGroupIOAccountingMetric k = 0; k < _CGROUP_IO_ACCOUNTING_METRIC_MAX; k++) { |
2303 | char buf[FORMAT_BYTES_MAX] = ""; | |
2304 | uint64_t value = UINT64_MAX; | |
2305 | ||
2306 | assert(io_fields[k]); | |
2307 | ||
2308 | (void) unit_get_io_accounting(u, k, k > 0, &value); | |
2309 | if (value == UINT64_MAX) | |
2310 | continue; | |
2311 | ||
2312 | have_io_accounting = true; | |
2313 | if (value > 0) | |
2314 | any_io = true; | |
2315 | ||
2316 | /* Format IO accounting data for inclusion in the structured log message */ | |
2317 | if (asprintf(&t, "%s=%" PRIu64, io_fields[k], value) < 0) { | |
2318 | r = log_oom(); | |
2319 | goto finish; | |
2320 | } | |
2321 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2322 | ||
2323 | /* Format the IO accounting data for inclusion in the human language message string, but only | |
2324 | * for the bytes counters (and not for the operations counters) */ | |
2325 | if (k == CGROUP_IO_READ_BYTES) { | |
2326 | assert(!rr); | |
2327 | rr = strjoin("read ", format_bytes(buf, sizeof(buf), value), " from disk"); | |
2328 | if (!rr) { | |
2329 | r = log_oom(); | |
2330 | goto finish; | |
2331 | } | |
2332 | } else if (k == CGROUP_IO_WRITE_BYTES) { | |
2333 | assert(!wr); | |
2334 | wr = strjoin("written ", format_bytes(buf, sizeof(buf), value), " to disk"); | |
2335 | if (!wr) { | |
2336 | r = log_oom(); | |
2337 | goto finish; | |
2338 | } | |
2339 | } | |
37109b85 ZJS |
2340 | |
2341 | if (IN_SET(k, CGROUP_IO_READ_BYTES, CGROUP_IO_WRITE_BYTES)) | |
2342 | log_level = raise_level(log_level, | |
2343 | value > MENTIONWORTHY_IO_BYTES, | |
2344 | value > NOTICEWORTHY_IO_BYTES); | |
bc40a20e LP |
2345 | } |
2346 | ||
2347 | if (have_io_accounting) { | |
2348 | if (any_io) { | |
2349 | if (rr) | |
2350 | message_parts[n_message_parts++] = TAKE_PTR(rr); | |
2351 | if (wr) | |
2352 | message_parts[n_message_parts++] = TAKE_PTR(wr); | |
2353 | ||
2354 | } else { | |
2355 | char *k; | |
2356 | ||
2357 | k = strdup("no IO"); | |
2358 | if (!k) { | |
2359 | r = log_oom(); | |
2360 | goto finish; | |
2361 | } | |
2362 | ||
2363 | message_parts[n_message_parts++] = k; | |
2364 | } | |
2365 | } | |
2366 | ||
915b1d01 LP |
2367 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
2368 | char buf[FORMAT_BYTES_MAX] = ""; | |
2369 | uint64_t value = UINT64_MAX; | |
2370 | ||
2371 | assert(ip_fields[m]); | |
2372 | ||
2373 | (void) unit_get_ip_accounting(u, m, &value); | |
2374 | if (value == UINT64_MAX) | |
2375 | continue; | |
82044702 LP |
2376 | |
2377 | have_ip_accounting = true; | |
a87b1faa LP |
2378 | if (value > 0) |
2379 | any_traffic = true; | |
915b1d01 LP |
2380 | |
2381 | /* Format IP accounting data for inclusion in the structured log message */ | |
2382 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2383 | r = log_oom(); | |
2384 | goto finish; | |
2385 | } | |
2386 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2387 | ||
2388 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2389 | * bytes counters (and not for the packets counters) */ | |
a87b1faa LP |
2390 | if (m == CGROUP_IP_INGRESS_BYTES) { |
2391 | assert(!igress); | |
ec9d636b | 2392 | igress = strjoin("received ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2393 | if (!igress) { |
2394 | r = log_oom(); | |
2395 | goto finish; | |
2396 | } | |
2397 | } else if (m == CGROUP_IP_EGRESS_BYTES) { | |
2398 | assert(!egress); | |
ec9d636b | 2399 | egress = strjoin("sent ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2400 | if (!egress) { |
2401 | r = log_oom(); | |
2402 | goto finish; | |
2403 | } | |
2404 | } | |
37109b85 ZJS |
2405 | |
2406 | if (IN_SET(m, CGROUP_IP_INGRESS_BYTES, CGROUP_IP_EGRESS_BYTES)) | |
2407 | log_level = raise_level(log_level, | |
2408 | value > MENTIONWORTHY_IP_BYTES, | |
2409 | value > NOTICEWORTHY_IP_BYTES); | |
a87b1faa LP |
2410 | } |
2411 | ||
82044702 LP |
2412 | if (have_ip_accounting) { |
2413 | if (any_traffic) { | |
2414 | if (igress) | |
2415 | message_parts[n_message_parts++] = TAKE_PTR(igress); | |
2416 | if (egress) | |
2417 | message_parts[n_message_parts++] = TAKE_PTR(egress); | |
a87b1faa | 2418 | |
82044702 LP |
2419 | } else { |
2420 | char *k; | |
915b1d01 | 2421 | |
82044702 LP |
2422 | k = strdup("no IP traffic"); |
2423 | if (!k) { | |
2424 | r = log_oom(); | |
2425 | goto finish; | |
2426 | } | |
2427 | ||
2428 | message_parts[n_message_parts++] = k; | |
2429 | } | |
915b1d01 LP |
2430 | } |
2431 | ||
2432 | /* Is there any accounting data available at all? */ | |
2433 | if (n_iovec == 0) { | |
2434 | r = 0; | |
2435 | goto finish; | |
2436 | } | |
2437 | ||
2438 | if (n_message_parts == 0) | |
a87b1faa | 2439 | t = strjoina("MESSAGE=", u->id, ": Completed."); |
915b1d01 LP |
2440 | else { |
2441 | _cleanup_free_ char *joined; | |
2442 | ||
2443 | message_parts[n_message_parts] = NULL; | |
2444 | ||
2445 | joined = strv_join(message_parts, ", "); | |
2446 | if (!joined) { | |
2447 | r = log_oom(); | |
2448 | goto finish; | |
2449 | } | |
2450 | ||
ec9d636b | 2451 | joined[0] = ascii_toupper(joined[0]); |
a87b1faa | 2452 | t = strjoina("MESSAGE=", u->id, ": ", joined, "."); |
915b1d01 LP |
2453 | } |
2454 | ||
2455 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2456 | * and hence don't increase n_iovec for them */ | |
2457 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2458 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2459 | ||
2460 | t = strjoina(u->manager->unit_log_field, u->id); | |
2461 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2462 | ||
2463 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2464 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2465 | ||
37109b85 | 2466 | log_struct_iovec(log_level, iovec, n_iovec + 4); |
915b1d01 LP |
2467 | r = 0; |
2468 | ||
2469 | finish: | |
2470 | for (i = 0; i < n_message_parts; i++) | |
2471 | free(message_parts[i]); | |
2472 | ||
2473 | for (i = 0; i < n_iovec; i++) | |
2474 | free(iovec[i].iov_base); | |
2475 | ||
2476 | return r; | |
2477 | ||
2478 | } | |
2479 | ||
adefcf28 LP |
2480 | static void unit_update_on_console(Unit *u) { |
2481 | bool b; | |
2482 | ||
2483 | assert(u); | |
2484 | ||
2485 | b = unit_needs_console(u); | |
2486 | if (u->on_console == b) | |
2487 | return; | |
2488 | ||
2489 | u->on_console = b; | |
2490 | if (b) | |
2491 | manager_ref_console(u->manager); | |
2492 | else | |
2493 | manager_unref_console(u->manager); | |
adefcf28 LP |
2494 | } |
2495 | ||
6eb65e7c LP |
2496 | static void unit_emit_audit_start(Unit *u) { |
2497 | assert(u); | |
2498 | ||
2499 | if (u->type != UNIT_SERVICE) | |
2500 | return; | |
2501 | ||
2502 | /* Write audit record if we have just finished starting up */ | |
2503 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); | |
2504 | u->in_audit = true; | |
2505 | } | |
2506 | ||
2507 | static void unit_emit_audit_stop(Unit *u, UnitActiveState state) { | |
2508 | assert(u); | |
2509 | ||
2510 | if (u->type != UNIT_SERVICE) | |
2511 | return; | |
2512 | ||
2513 | if (u->in_audit) { | |
2514 | /* Write audit record if we have just finished shutting down */ | |
2515 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, state == UNIT_INACTIVE); | |
2516 | u->in_audit = false; | |
2517 | } else { | |
2518 | /* Hmm, if there was no start record written write it now, so that we always have a nice pair */ | |
2519 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, state == UNIT_INACTIVE); | |
2520 | ||
2521 | if (state == UNIT_INACTIVE) | |
2522 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); | |
2523 | } | |
2524 | } | |
2525 | ||
16c74914 LP |
2526 | static bool unit_process_job(Job *j, UnitActiveState ns, UnitNotifyFlags flags) { |
2527 | bool unexpected = false; | |
31cd5f63 | 2528 | JobResult result; |
16c74914 LP |
2529 | |
2530 | assert(j); | |
2531 | ||
2532 | if (j->state == JOB_WAITING) | |
2533 | ||
2534 | /* So we reached a different state for this job. Let's see if we can run it now if it failed previously | |
2535 | * due to EAGAIN. */ | |
2536 | job_add_to_run_queue(j); | |
2537 | ||
2538 | /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and | |
2539 | * hence needs to invalidate jobs. */ | |
2540 | ||
2541 | switch (j->type) { | |
2542 | ||
2543 | case JOB_START: | |
2544 | case JOB_VERIFY_ACTIVE: | |
2545 | ||
2546 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
2547 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2548 | else if (j->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
2549 | unexpected = true; | |
2550 | ||
31cd5f63 AZ |
2551 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
2552 | if (ns == UNIT_FAILED) | |
2553 | result = JOB_FAILED; | |
2554 | else if (FLAGS_SET(flags, UNIT_NOTIFY_SKIP_CONDITION)) | |
2555 | result = JOB_SKIPPED; | |
2556 | else | |
2557 | result = JOB_DONE; | |
2558 | ||
2559 | job_finish_and_invalidate(j, result, true, false); | |
2560 | } | |
16c74914 LP |
2561 | } |
2562 | ||
2563 | break; | |
2564 | ||
2565 | case JOB_RELOAD: | |
2566 | case JOB_RELOAD_OR_START: | |
2567 | case JOB_TRY_RELOAD: | |
2568 | ||
2569 | if (j->state == JOB_RUNNING) { | |
2570 | if (ns == UNIT_ACTIVE) | |
2571 | job_finish_and_invalidate(j, (flags & UNIT_NOTIFY_RELOAD_FAILURE) ? JOB_FAILED : JOB_DONE, true, false); | |
2572 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { | |
2573 | unexpected = true; | |
2574 | ||
2575 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2576 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2577 | } | |
2578 | } | |
2579 | ||
2580 | break; | |
2581 | ||
2582 | case JOB_STOP: | |
2583 | case JOB_RESTART: | |
2584 | case JOB_TRY_RESTART: | |
2585 | ||
2586 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2587 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2588 | else if (j->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
2589 | unexpected = true; | |
2590 | job_finish_and_invalidate(j, JOB_FAILED, true, false); | |
2591 | } | |
2592 | ||
2593 | break; | |
2594 | ||
2595 | default: | |
2596 | assert_not_reached("Job type unknown"); | |
2597 | } | |
2598 | ||
2599 | return unexpected; | |
2600 | } | |
2601 | ||
2ad2e41a | 2602 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, UnitNotifyFlags flags) { |
429926e9 | 2603 | const char *reason; |
8559b3b7 | 2604 | Manager *m; |
a096ed36 | 2605 | |
87f0e418 LP |
2606 | assert(u); |
2607 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2608 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2609 | |
8559b3b7 LP |
2610 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2611 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2612 | * remounted this function will be called too! */ | |
87f0e418 | 2613 | |
546ac4f0 MS |
2614 | m = u->manager; |
2615 | ||
3c4832ad LP |
2616 | /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in |
2617 | * the bus queue, so that any job change signal queued will force out the unit change signal first. */ | |
2618 | unit_add_to_dbus_queue(u); | |
2619 | ||
f755e3b7 | 2620 | /* Update timestamps for state changes */ |
2c289ea8 | 2621 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2622 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2623 | |
bdbf9951 | 2624 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2625 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2626 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2627 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2628 | |
2629 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2630 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2631 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2632 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2633 | } |
87f0e418 | 2634 | |
865cc19a | 2635 | /* Keep track of failed units */ |
8724defe | 2636 | (void) manager_update_failed_units(m, u, ns == UNIT_FAILED); |
f755e3b7 | 2637 | |
d3070fbd LP |
2638 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2639 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
efdb0237 | 2640 | unit_prune_cgroup(u); |
d3070fbd LP |
2641 | unit_unlink_state_files(u); |
2642 | } | |
fb385181 | 2643 | |
adefcf28 | 2644 | unit_update_on_console(u); |
7ed9f6cd | 2645 | |
2c289ea8 | 2646 | if (!MANAGER_IS_RELOADING(m)) { |
a1c7334b LP |
2647 | bool unexpected; |
2648 | ||
2649 | /* Let's propagate state changes to the job */ | |
2650 | if (u->job) | |
2651 | unexpected = unit_process_job(u->job, ns, flags); | |
2652 | else | |
2653 | unexpected = true; | |
f3bff0eb | 2654 | |
a1c7334b LP |
2655 | /* If this state change happened without being requested by a job, then let's retroactively start or |
2656 | * stop dependencies. We skip that step when deserializing, since we don't want to create any | |
2657 | * additional jobs just because something is already activated. */ | |
bdbf9951 LP |
2658 | |
2659 | if (unexpected) { | |
2660 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2661 | retroactively_start_dependencies(u); | |
2662 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2663 | retroactively_stop_dependencies(u); | |
2664 | } | |
5de9682c | 2665 | |
cd0504d0 | 2666 | /* stop unneeded units regardless if going down was expected or not */ |
a3c1168a | 2667 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
cd0504d0 MS |
2668 | check_unneeded_dependencies(u); |
2669 | ||
bdbf9951 | 2670 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2671 | log_unit_debug(u, "Unit entered failed state."); |
2ad2e41a LP |
2672 | |
2673 | if (!(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
2674 | unit_start_on_failure(u); | |
cd6d0a45 | 2675 | } |
e537352b | 2676 | |
256f65d0 LP |
2677 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns) && !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
2678 | /* This unit just finished starting up */ | |
3b2775c5 | 2679 | |
6eb65e7c | 2680 | unit_emit_audit_start(u); |
546ac4f0 | 2681 | manager_send_unit_plymouth(m, u); |
256f65d0 | 2682 | } |
bdbf9951 | 2683 | |
256f65d0 | 2684 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && !UNIT_IS_INACTIVE_OR_FAILED(os)) { |
915b1d01 | 2685 | /* This unit just stopped/failed. */ |
256f65d0 | 2686 | |
6eb65e7c | 2687 | unit_emit_audit_stop(u, ns); |
915b1d01 | 2688 | unit_log_resources(u); |
cd6d0a45 | 2689 | } |
f278026d LP |
2690 | } |
2691 | ||
31dc1ca3 LP |
2692 | manager_recheck_journal(m); |
2693 | manager_recheck_dbus(m); | |
e63ebf71 | 2694 | |
3ecaa09b | 2695 | unit_trigger_notify(u); |
3b2775c5 | 2696 | |
8724defe | 2697 | if (!MANAGER_IS_RELOADING(m)) { |
8559b3b7 | 2698 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ |
fda09318 | 2699 | unit_submit_to_stop_when_unneeded_queue(u); |
c1e1601e | 2700 | |
8559b3b7 LP |
2701 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens when |
2702 | * something BindsTo= to a Type=oneshot unit, as these units go directly from starting to inactive, | |
ff502445 LP |
2703 | * without ever entering started.) */ |
2704 | unit_check_binds_to(u); | |
53c35a76 | 2705 | |
429926e9 TR |
2706 | if (os != UNIT_FAILED && ns == UNIT_FAILED) { |
2707 | reason = strjoina("unit ", u->id, " failed"); | |
36c4dc08 | 2708 | emergency_action(m, u->failure_action, 0, u->reboot_arg, unit_failure_action_exit_status(u), reason); |
429926e9 TR |
2709 | } else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) { |
2710 | reason = strjoina("unit ", u->id, " succeeded"); | |
36c4dc08 | 2711 | emergency_action(m, u->success_action, 0, u->reboot_arg, unit_success_action_exit_status(u), reason); |
429926e9 | 2712 | } |
ff502445 LP |
2713 | } |
2714 | ||
701cc384 | 2715 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2716 | } |
2717 | ||
f75f613d | 2718 | int unit_watch_pid(Unit *u, pid_t pid, bool exclusive) { |
62a76913 | 2719 | int r; |
a911bb9a | 2720 | |
87f0e418 | 2721 | assert(u); |
62a76913 | 2722 | assert(pid_is_valid(pid)); |
87f0e418 | 2723 | |
62a76913 | 2724 | /* Watch a specific PID */ |
5ba6985b | 2725 | |
f75f613d FB |
2726 | /* Caller might be sure that this PID belongs to this unit only. Let's take this |
2727 | * opportunity to remove any stalled references to this PID as they can be created | |
2728 | * easily (when watching a process which is not our direct child). */ | |
2729 | if (exclusive) | |
2730 | manager_unwatch_pid(u->manager, pid); | |
2731 | ||
d5099efc | 2732 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2733 | if (r < 0) |
2734 | return r; | |
2735 | ||
62a76913 | 2736 | r = hashmap_ensure_allocated(&u->manager->watch_pids, NULL); |
a911bb9a LP |
2737 | if (r < 0) |
2738 | return r; | |
2739 | ||
62a76913 LP |
2740 | /* First try, let's add the unit keyed by "pid". */ |
2741 | r = hashmap_put(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2742 | if (r == -EEXIST) { | |
2743 | Unit **array; | |
2744 | bool found = false; | |
2745 | size_t n = 0; | |
05e343b7 | 2746 | |
62a76913 LP |
2747 | /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points |
2748 | * to an array of Units rather than just a Unit), lists us already. */ | |
a911bb9a | 2749 | |
62a76913 LP |
2750 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); |
2751 | if (array) | |
2752 | for (; array[n]; n++) | |
2753 | if (array[n] == u) | |
2754 | found = true; | |
a911bb9a | 2755 | |
62a76913 LP |
2756 | if (found) /* Found it already? if so, do nothing */ |
2757 | r = 0; | |
2758 | else { | |
2759 | Unit **new_array; | |
2760 | ||
2761 | /* Allocate a new array */ | |
2762 | new_array = new(Unit*, n + 2); | |
2763 | if (!new_array) | |
2764 | return -ENOMEM; | |
2765 | ||
2766 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2767 | new_array[n] = u; | |
2768 | new_array[n+1] = NULL; | |
2769 | ||
2770 | /* Add or replace the old array */ | |
2771 | r = hashmap_replace(u->manager->watch_pids, PID_TO_PTR(-pid), new_array); | |
2772 | if (r < 0) { | |
2773 | free(new_array); | |
2774 | return r; | |
2775 | } | |
2776 | ||
2777 | free(array); | |
2778 | } | |
2779 | } else if (r < 0) | |
2780 | return r; | |
2781 | ||
2782 | r = set_put(u->pids, PID_TO_PTR(pid)); | |
2783 | if (r < 0) | |
2784 | return r; | |
2785 | ||
2786 | return 0; | |
87f0e418 LP |
2787 | } |
2788 | ||
2789 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
62a76913 LP |
2790 | Unit **array; |
2791 | ||
87f0e418 | 2792 | assert(u); |
62a76913 LP |
2793 | assert(pid_is_valid(pid)); |
2794 | ||
2795 | /* First let's drop the unit in case it's keyed as "pid". */ | |
2796 | (void) hashmap_remove_value(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2797 | ||
2798 | /* Then, let's also drop the unit, in case it's in the array keyed by -pid */ | |
2799 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); | |
2800 | if (array) { | |
2801 | size_t n, m = 0; | |
2802 | ||
2803 | /* Let's iterate through the array, dropping our own entry */ | |
2804 | for (n = 0; array[n]; n++) | |
2805 | if (array[n] != u) | |
2806 | array[m++] = array[n]; | |
2807 | array[m] = NULL; | |
2808 | ||
2809 | if (m == 0) { | |
2810 | /* The array is now empty, remove the entire entry */ | |
20c3acfa | 2811 | assert_se(hashmap_remove(u->manager->watch_pids, PID_TO_PTR(-pid)) == array); |
62a76913 LP |
2812 | free(array); |
2813 | } | |
2814 | } | |
87f0e418 | 2815 | |
fea72cc0 | 2816 | (void) set_remove(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2817 | } |
2818 | ||
bd44e61b LP |
2819 | void unit_unwatch_all_pids(Unit *u) { |
2820 | assert(u); | |
2821 | ||
2822 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2823 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2824 | |
efdb0237 | 2825 | u->pids = set_free(u->pids); |
a911bb9a LP |
2826 | } |
2827 | ||
50be4f4a LP |
2828 | static void unit_tidy_watch_pids(Unit *u) { |
2829 | pid_t except1, except2; | |
a911bb9a LP |
2830 | Iterator i; |
2831 | void *e; | |
2832 | ||
2833 | assert(u); | |
2834 | ||
2835 | /* Cleans dead PIDs from our list */ | |
2836 | ||
50be4f4a LP |
2837 | except1 = unit_main_pid(u); |
2838 | except2 = unit_control_pid(u); | |
2839 | ||
a911bb9a | 2840 | SET_FOREACH(e, u->pids, i) { |
fea72cc0 | 2841 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2842 | |
2843 | if (pid == except1 || pid == except2) | |
2844 | continue; | |
2845 | ||
9f5650ae | 2846 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2847 | unit_unwatch_pid(u, pid); |
a911bb9a | 2848 | } |
87f0e418 LP |
2849 | } |
2850 | ||
50be4f4a LP |
2851 | static int on_rewatch_pids_event(sd_event_source *s, void *userdata) { |
2852 | Unit *u = userdata; | |
2853 | ||
2854 | assert(s); | |
2855 | assert(u); | |
2856 | ||
2857 | unit_tidy_watch_pids(u); | |
2858 | unit_watch_all_pids(u); | |
2859 | ||
2860 | /* If the PID set is empty now, then let's finish this off. */ | |
2861 | unit_synthesize_cgroup_empty_event(u); | |
2862 | ||
2863 | return 0; | |
2864 | } | |
2865 | ||
2866 | int unit_enqueue_rewatch_pids(Unit *u) { | |
2867 | int r; | |
2868 | ||
2869 | assert(u); | |
2870 | ||
2871 | if (!u->cgroup_path) | |
2872 | return -ENOENT; | |
2873 | ||
2874 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
2875 | if (r < 0) | |
2876 | return r; | |
2877 | if (r > 0) /* On unified we can use proper notifications */ | |
2878 | return 0; | |
2879 | ||
2880 | /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new | |
2881 | * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it | |
2882 | * involves issuing kill(pid, 0) on all processes we watch. */ | |
2883 | ||
2884 | if (!u->rewatch_pids_event_source) { | |
2885 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
2886 | ||
2887 | r = sd_event_add_defer(u->manager->event, &s, on_rewatch_pids_event, u); | |
2888 | if (r < 0) | |
2889 | return log_error_errno(r, "Failed to allocate event source for tidying watched PIDs: %m"); | |
2890 | ||
2891 | r = sd_event_source_set_priority(s, SD_EVENT_PRIORITY_IDLE); | |
2892 | if (r < 0) | |
28b77ab2 | 2893 | return log_error_errno(r, "Failed to adjust priority of event source for tidying watched PIDs: %m"); |
50be4f4a LP |
2894 | |
2895 | (void) sd_event_source_set_description(s, "tidy-watch-pids"); | |
2896 | ||
2897 | u->rewatch_pids_event_source = TAKE_PTR(s); | |
2898 | } | |
2899 | ||
2900 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_ONESHOT); | |
2901 | if (r < 0) | |
2902 | return log_error_errno(r, "Failed to enable event source for tidying watched PIDs: %m"); | |
2903 | ||
2904 | return 0; | |
2905 | } | |
2906 | ||
2907 | void unit_dequeue_rewatch_pids(Unit *u) { | |
2908 | int r; | |
2909 | assert(u); | |
2910 | ||
2911 | if (!u->rewatch_pids_event_source) | |
2912 | return; | |
2913 | ||
2914 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_OFF); | |
2915 | if (r < 0) | |
2916 | log_warning_errno(r, "Failed to disable event source for tidying watched PIDs, ignoring: %m"); | |
2917 | ||
2918 | u->rewatch_pids_event_source = sd_event_source_unref(u->rewatch_pids_event_source); | |
2919 | } | |
2920 | ||
87f0e418 LP |
2921 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2922 | assert(u); | |
2923 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2924 | ||
2925 | switch (j) { | |
2926 | ||
2927 | case JOB_VERIFY_ACTIVE: | |
2928 | case JOB_START: | |
e0209d83 | 2929 | case JOB_NOP: |
f5869324 | 2930 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
86b52a39 | 2931 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueuing |
f5869324 | 2932 | * jobs for it. */ |
87f0e418 LP |
2933 | return true; |
2934 | ||
f5869324 LP |
2935 | case JOB_STOP: |
2936 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
86b52a39 | 2937 | * external events), hence it makes no sense to permit enqueuing such a request either. */ |
f5869324 LP |
2938 | return !u->perpetual; |
2939 | ||
87f0e418 LP |
2940 | case JOB_RESTART: |
2941 | case JOB_TRY_RESTART: | |
f5869324 | 2942 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
2943 | |
2944 | case JOB_RELOAD: | |
3282591d | 2945 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2946 | return unit_can_reload(u); |
2947 | ||
2948 | case JOB_RELOAD_OR_START: | |
2949 | return unit_can_reload(u) && unit_can_start(u); | |
2950 | ||
2951 | default: | |
2952 | assert_not_reached("Invalid job type"); | |
2953 | } | |
2954 | } | |
2955 | ||
f2341e0a LP |
2956 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2957 | assert(u); | |
d1fab3fe | 2958 | |
f2341e0a LP |
2959 | /* Only warn about some unit types */ |
2960 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2961 | return; | |
3f3cc397 | 2962 | |
f2341e0a LP |
2963 | if (streq_ptr(u->id, other)) |
2964 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2965 | else | |
2966 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2967 | } |
2968 | ||
eef85c4a LP |
2969 | static int unit_add_dependency_hashmap( |
2970 | Hashmap **h, | |
2971 | Unit *other, | |
2972 | UnitDependencyMask origin_mask, | |
2973 | UnitDependencyMask destination_mask) { | |
2974 | ||
2975 | UnitDependencyInfo info; | |
2976 | int r; | |
2977 | ||
2978 | assert(h); | |
2979 | assert(other); | |
2980 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2981 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2982 | assert(origin_mask > 0 || destination_mask > 0); | |
2983 | ||
2984 | r = hashmap_ensure_allocated(h, NULL); | |
2985 | if (r < 0) | |
2986 | return r; | |
2987 | ||
2988 | assert_cc(sizeof(void*) == sizeof(info)); | |
2989 | ||
2990 | info.data = hashmap_get(*h, other); | |
2991 | if (info.data) { | |
2992 | /* Entry already exists. Add in our mask. */ | |
2993 | ||
d94a24ca ZJS |
2994 | if (FLAGS_SET(origin_mask, info.origin_mask) && |
2995 | FLAGS_SET(destination_mask, info.destination_mask)) | |
eef85c4a LP |
2996 | return 0; /* NOP */ |
2997 | ||
2998 | info.origin_mask |= origin_mask; | |
2999 | info.destination_mask |= destination_mask; | |
3000 | ||
3001 | r = hashmap_update(*h, other, info.data); | |
3002 | } else { | |
3003 | info = (UnitDependencyInfo) { | |
3004 | .origin_mask = origin_mask, | |
3005 | .destination_mask = destination_mask, | |
3006 | }; | |
3007 | ||
3008 | r = hashmap_put(*h, other, info.data); | |
3009 | } | |
3010 | if (r < 0) | |
3011 | return r; | |
3012 | ||
3013 | return 1; | |
3014 | } | |
3015 | ||
3016 | int unit_add_dependency( | |
3017 | Unit *u, | |
3018 | UnitDependency d, | |
3019 | Unit *other, | |
3020 | bool add_reference, | |
3021 | UnitDependencyMask mask) { | |
87f0e418 LP |
3022 | |
3023 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
3024 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 3025 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 3026 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 3027 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 3028 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 3029 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 3030 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 3031 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 3032 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 3033 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
3034 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
3035 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 3036 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 3037 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 3038 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 3039 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
3040 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
3041 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 3042 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 3043 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 3044 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 3045 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 3046 | }; |
eef85c4a LP |
3047 | Unit *original_u = u, *original_other = other; |
3048 | int r; | |
87f0e418 LP |
3049 | |
3050 | assert(u); | |
3051 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
3052 | assert(other); |
3053 | ||
9f151f29 LP |
3054 | u = unit_follow_merge(u); |
3055 | other = unit_follow_merge(other); | |
3056 | ||
87f0e418 LP |
3057 | /* We won't allow dependencies on ourselves. We will not |
3058 | * consider them an error however. */ | |
d1fab3fe | 3059 | if (u == other) { |
eef85c4a | 3060 | maybe_warn_about_dependency(original_u, original_other->id, d); |
87f0e418 | 3061 | return 0; |
d1fab3fe | 3062 | } |
87f0e418 | 3063 | |
b862c257 FB |
3064 | /* Note that ordering a device unit after a unit is permitted since it |
3065 | * allows to start its job running timeout at a specific time. */ | |
3066 | if (d == UNIT_BEFORE && other->type == UNIT_DEVICE) { | |
3067 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); | |
c80a9a33 LP |
3068 | return 0; |
3069 | } | |
3070 | ||
3071 | if (d == UNIT_ON_FAILURE && !UNIT_VTABLE(u)->can_fail) { | |
3072 | log_unit_warning(u, "Requested dependency OnFailure=%s ignored (%s units cannot fail).", other->id, unit_type_to_string(u->type)); | |
3073 | return 0; | |
3074 | } | |
3075 | ||
3076 | if (d == UNIT_TRIGGERS && !UNIT_VTABLE(u)->can_trigger) | |
3077 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3078 | "Requested dependency Triggers=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(u->type)); | |
3079 | if (d == UNIT_TRIGGERED_BY && !UNIT_VTABLE(other)->can_trigger) | |
3080 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3081 | "Requested dependency TriggeredBy=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(other->type)); | |
3082 | ||
eef85c4a | 3083 | r = unit_add_dependency_hashmap(u->dependencies + d, other, mask, 0); |
613b411c | 3084 | if (r < 0) |
87f0e418 LP |
3085 | return r; |
3086 | ||
eef85c4a LP |
3087 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
3088 | r = unit_add_dependency_hashmap(other->dependencies + inverse_table[d], u, 0, mask); | |
613b411c LP |
3089 | if (r < 0) |
3090 | return r; | |
3091 | } | |
3092 | ||
3093 | if (add_reference) { | |
eef85c4a | 3094 | r = unit_add_dependency_hashmap(u->dependencies + UNIT_REFERENCES, other, mask, 0); |
613b411c | 3095 | if (r < 0) |
5de9682c LP |
3096 | return r; |
3097 | ||
eef85c4a | 3098 | r = unit_add_dependency_hashmap(other->dependencies + UNIT_REFERENCED_BY, u, 0, mask); |
613b411c | 3099 | if (r < 0) |
701cc384 | 3100 | return r; |
613b411c | 3101 | } |
87f0e418 | 3102 | |
c1e1601e | 3103 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
3104 | return 0; |
3105 | } | |
0301abf4 | 3106 | |
eef85c4a | 3107 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
2c966c03 LP |
3108 | int r; |
3109 | ||
3110 | assert(u); | |
3111 | ||
eef85c4a | 3112 | r = unit_add_dependency(u, d, other, add_reference, mask); |
3f3cc397 | 3113 | if (r < 0) |
2c966c03 LP |
3114 | return r; |
3115 | ||
eef85c4a | 3116 | return unit_add_dependency(u, e, other, add_reference, mask); |
2c966c03 LP |
3117 | } |
3118 | ||
23e8c796 | 3119 | static int resolve_template(Unit *u, const char *name, char **buf, const char **ret) { |
7410616c | 3120 | int r; |
9e2f7c11 LP |
3121 | |
3122 | assert(u); | |
23e8c796 | 3123 | assert(name); |
7410616c LP |
3124 | assert(buf); |
3125 | assert(ret); | |
9e2f7c11 | 3126 | |
7410616c LP |
3127 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
3128 | *buf = NULL; | |
3129 | *ret = name; | |
3130 | return 0; | |
9e2f7c11 LP |
3131 | } |
3132 | ||
ac155bb8 | 3133 | if (u->instance) |
7410616c | 3134 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 3135 | else { |
ae018d9b | 3136 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 3137 | |
7410616c LP |
3138 | r = unit_name_to_prefix(u->id, &i); |
3139 | if (r < 0) | |
3140 | return r; | |
9e2f7c11 | 3141 | |
7410616c | 3142 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 3143 | } |
7410616c LP |
3144 | if (r < 0) |
3145 | return r; | |
9e2f7c11 | 3146 | |
7410616c LP |
3147 | *ret = *buf; |
3148 | return 0; | |
9e2f7c11 LP |
3149 | } |
3150 | ||
35d8c19a | 3151 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3152 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
3153 | Unit *other; |
3154 | int r; | |
3155 | ||
9e2f7c11 | 3156 | assert(u); |
35d8c19a | 3157 | assert(name); |
09b6b09f | 3158 | |
23e8c796 | 3159 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3160 | if (r < 0) |
3161 | return r; | |
09b6b09f | 3162 | |
35d8c19a | 3163 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
8afbb8e1 LP |
3164 | if (r < 0) |
3165 | return r; | |
9e2f7c11 | 3166 | |
eef85c4a | 3167 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
3168 | } |
3169 | ||
5a724170 | 3170 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3171 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
3172 | Unit *other; |
3173 | int r; | |
2c966c03 LP |
3174 | |
3175 | assert(u); | |
5a724170 | 3176 | assert(name); |
2c966c03 | 3177 | |
23e8c796 | 3178 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3179 | if (r < 0) |
3180 | return r; | |
2c966c03 | 3181 | |
5a724170 | 3182 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
3f3cc397 | 3183 | if (r < 0) |
68eda4bd | 3184 | return r; |
2c966c03 | 3185 | |
eef85c4a | 3186 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
3187 | } |
3188 | ||
0301abf4 | 3189 | int set_unit_path(const char *p) { |
0301abf4 | 3190 | /* This is mostly for debug purposes */ |
cbe46ead | 3191 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 3192 | return -errno; |
0301abf4 LP |
3193 | |
3194 | return 0; | |
3195 | } | |
88066b3a | 3196 | |
ea430986 | 3197 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
3198 | assert(u); |
3199 | ||
ac155bb8 | 3200 | if (!u->id) |
04ade7d2 LP |
3201 | return NULL; |
3202 | ||
48899192 | 3203 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
3204 | } |
3205 | ||
4b58153d LP |
3206 | char *unit_dbus_path_invocation_id(Unit *u) { |
3207 | assert(u); | |
3208 | ||
3209 | if (sd_id128_is_null(u->invocation_id)) | |
3210 | return NULL; | |
3211 | ||
3212 | return unit_dbus_path_from_name(u->invocation_id_string); | |
3213 | } | |
3214 | ||
db868d45 ZJS |
3215 | static int unit_set_invocation_id(Unit *u, sd_id128_t id) { |
3216 | int r; | |
3217 | ||
3218 | assert(u); | |
3219 | ||
3220 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
3221 | ||
3222 | if (sd_id128_equal(u->invocation_id, id)) | |
3223 | return 0; | |
3224 | ||
3225 | if (!sd_id128_is_null(u->invocation_id)) | |
3226 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3227 | ||
3228 | if (sd_id128_is_null(id)) { | |
3229 | r = 0; | |
3230 | goto reset; | |
3231 | } | |
3232 | ||
3233 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
3234 | if (r < 0) | |
3235 | goto reset; | |
3236 | ||
3237 | u->invocation_id = id; | |
3238 | sd_id128_to_string(id, u->invocation_id_string); | |
3239 | ||
3240 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3241 | if (r < 0) | |
3242 | goto reset; | |
3243 | ||
3244 | return 0; | |
3245 | ||
3246 | reset: | |
3247 | u->invocation_id = SD_ID128_NULL; | |
3248 | u->invocation_id_string[0] = 0; | |
3249 | return r; | |
3250 | } | |
3251 | ||
d79200e2 LP |
3252 | int unit_set_slice(Unit *u, Unit *slice) { |
3253 | assert(u); | |
3254 | assert(slice); | |
3255 | ||
3256 | /* Sets the unit slice if it has not been set before. Is extra | |
3257 | * careful, to only allow this for units that actually have a | |
3258 | * cgroup context. Also, we don't allow to set this for slices | |
3259 | * (since the parent slice is derived from the name). Make | |
3260 | * sure the unit we set is actually a slice. */ | |
3261 | ||
3262 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3263 | return -EOPNOTSUPP; | |
3264 | ||
3265 | if (u->type == UNIT_SLICE) | |
3266 | return -EINVAL; | |
3267 | ||
102ef982 LP |
3268 | if (unit_active_state(u) != UNIT_INACTIVE) |
3269 | return -EBUSY; | |
3270 | ||
d79200e2 LP |
3271 | if (slice->type != UNIT_SLICE) |
3272 | return -EINVAL; | |
3273 | ||
efdb0237 LP |
3274 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
3275 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
3276 | return -EPERM; | |
3277 | ||
d79200e2 LP |
3278 | if (UNIT_DEREF(u->slice) == slice) |
3279 | return 0; | |
3280 | ||
99e66921 TH |
3281 | /* Disallow slice changes if @u is already bound to cgroups */ |
3282 | if (UNIT_ISSET(u->slice) && u->cgroup_realized) | |
d79200e2 LP |
3283 | return -EBUSY; |
3284 | ||
7f7d01ed | 3285 | unit_ref_set(&u->slice, u, slice); |
d79200e2 LP |
3286 | return 1; |
3287 | } | |
3288 | ||
3289 | int unit_set_default_slice(Unit *u) { | |
a8833944 | 3290 | const char *slice_name; |
a016b922 LP |
3291 | Unit *slice; |
3292 | int r; | |
3293 | ||
3294 | assert(u); | |
3295 | ||
9444b1f2 | 3296 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
3297 | return 0; |
3298 | ||
a8833944 LP |
3299 | if (u->instance) { |
3300 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 3301 | |
a8833944 LP |
3302 | /* Implicitly place all instantiated units in their |
3303 | * own per-template slice */ | |
3304 | ||
7410616c LP |
3305 | r = unit_name_to_prefix(u->id, &prefix); |
3306 | if (r < 0) | |
3307 | return r; | |
a8833944 LP |
3308 | |
3309 | /* The prefix is already escaped, but it might include | |
3310 | * "-" which has a special meaning for slice units, | |
3311 | * hence escape it here extra. */ | |
7410616c | 3312 | escaped = unit_name_escape(prefix); |
a8833944 LP |
3313 | if (!escaped) |
3314 | return -ENOMEM; | |
3315 | ||
463d0d15 | 3316 | if (MANAGER_IS_SYSTEM(u->manager)) |
00e7b3c8 | 3317 | slice_name = strjoina("system-", escaped, ".slice"); |
a8833944 | 3318 | else |
00e7b3c8 | 3319 | slice_name = strjoina(escaped, ".slice"); |
a8833944 LP |
3320 | } else |
3321 | slice_name = | |
463d0d15 | 3322 | MANAGER_IS_SYSTEM(u->manager) && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
3323 | ? SPECIAL_SYSTEM_SLICE |
3324 | : SPECIAL_ROOT_SLICE; | |
3325 | ||
3326 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
3327 | if (r < 0) |
3328 | return r; | |
3329 | ||
d79200e2 | 3330 | return unit_set_slice(u, slice); |
a016b922 LP |
3331 | } |
3332 | ||
9444b1f2 LP |
3333 | const char *unit_slice_name(Unit *u) { |
3334 | assert(u); | |
3335 | ||
3336 | if (!UNIT_ISSET(u->slice)) | |
3337 | return NULL; | |
3338 | ||
3339 | return UNIT_DEREF(u->slice)->id; | |
3340 | } | |
3341 | ||
f6ff8c29 | 3342 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 3343 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
3344 | int r; |
3345 | ||
3346 | assert(u); | |
3347 | assert(type); | |
3348 | assert(_found); | |
3349 | ||
7410616c LP |
3350 | r = unit_name_change_suffix(u->id, type, &t); |
3351 | if (r < 0) | |
3352 | return r; | |
3353 | if (unit_has_name(u, t)) | |
3354 | return -EINVAL; | |
f6ff8c29 | 3355 | |
ac155bb8 | 3356 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3357 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3358 | return r; |
3359 | } | |
3360 | ||
bbc29086 | 3361 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
fc67a943 | 3362 | const char *new_owner; |
bbc29086 DM |
3363 | Unit *u = userdata; |
3364 | int r; | |
3365 | ||
3366 | assert(message); | |
3367 | assert(u); | |
3368 | ||
fc67a943 | 3369 | r = sd_bus_message_read(message, "sss", NULL, NULL, &new_owner); |
bbc29086 DM |
3370 | if (r < 0) { |
3371 | bus_log_parse_error(r); | |
3372 | return 0; | |
3373 | } | |
3374 | ||
3375 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3376 | UNIT_VTABLE(u)->bus_name_owner_change(u, empty_to_null(new_owner)); |
a5a8776a MJ |
3377 | |
3378 | return 0; | |
3379 | } | |
3380 | ||
3381 | static int get_name_owner_handler(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
3382 | const sd_bus_error *e; | |
3383 | const char *new_owner; | |
3384 | Unit *u = userdata; | |
3385 | int r; | |
3386 | ||
3387 | assert(message); | |
3388 | assert(u); | |
3389 | ||
3390 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); | |
3391 | ||
a5a8776a | 3392 | e = sd_bus_message_get_error(message); |
a5a8776a | 3393 | if (e) { |
a54654ba LP |
3394 | if (!sd_bus_error_has_name(e, "org.freedesktop.DBus.Error.NameHasNoOwner")) |
3395 | log_unit_error(u, "Unexpected error response from GetNameOwner(): %s", e->message); | |
a5a8776a | 3396 | |
fc67a943 LP |
3397 | new_owner = NULL; |
3398 | } else { | |
3399 | r = sd_bus_message_read(message, "s", &new_owner); | |
3400 | if (r < 0) | |
3401 | return bus_log_parse_error(r); | |
a5a8776a | 3402 | |
fc67a943 LP |
3403 | assert(!isempty(new_owner)); |
3404 | } | |
a5a8776a MJ |
3405 | |
3406 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3407 | UNIT_VTABLE(u)->bus_name_owner_change(u, new_owner); |
bbc29086 DM |
3408 | |
3409 | return 0; | |
3410 | } | |
3411 | ||
9806e87d LP |
3412 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3413 | const char *match; | |
a5b07847 | 3414 | int r; |
bbc29086 | 3415 | |
9806e87d LP |
3416 | assert(u); |
3417 | assert(bus); | |
3418 | assert(name); | |
bbc29086 | 3419 | |
a5b07847 | 3420 | if (u->match_bus_slot || u->get_name_owner_slot) |
bbc29086 DM |
3421 | return -EBUSY; |
3422 | ||
9806e87d | 3423 | match = strjoina("type='signal'," |
81d62103 ZJS |
3424 | "sender='org.freedesktop.DBus'," |
3425 | "path='/org/freedesktop/DBus'," | |
3426 | "interface='org.freedesktop.DBus'," | |
3427 | "member='NameOwnerChanged'," | |
3428 | "arg0='", name, "'"); | |
bbc29086 | 3429 | |
a5b07847 | 3430 | r = sd_bus_add_match_async(bus, &u->match_bus_slot, match, signal_name_owner_changed, NULL, u); |
a5a8776a MJ |
3431 | if (r < 0) |
3432 | return r; | |
3433 | ||
a5b07847 LP |
3434 | r = sd_bus_call_method_async( |
3435 | bus, | |
3436 | &u->get_name_owner_slot, | |
3437 | "org.freedesktop.DBus", | |
3438 | "/org/freedesktop/DBus", | |
3439 | "org.freedesktop.DBus", | |
3440 | "GetNameOwner", | |
3441 | get_name_owner_handler, | |
3442 | u, | |
3443 | "s", name); | |
3444 | if (r < 0) { | |
3445 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3446 | return r; | |
3447 | } | |
3448 | ||
3449 | log_unit_debug(u, "Watching D-Bus name '%s'.", name); | |
3450 | return 0; | |
bbc29086 DM |
3451 | } |
3452 | ||
05e343b7 | 3453 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3454 | int r; |
3455 | ||
05e343b7 LP |
3456 | assert(u); |
3457 | assert(name); | |
3458 | ||
3459 | /* Watch a specific name on the bus. We only support one unit | |
3460 | * watching each name for now. */ | |
3461 | ||
bbc29086 DM |
3462 | if (u->manager->api_bus) { |
3463 | /* If the bus is already available, install the match directly. | |
3464 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3465 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3466 | if (r < 0) |
8ea823b6 | 3467 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3468 | } |
3469 | ||
3470 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3471 | if (r < 0) { | |
3472 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
a5b07847 | 3473 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
bbc29086 DM |
3474 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); |
3475 | } | |
3476 | ||
3477 | return 0; | |
05e343b7 LP |
3478 | } |
3479 | ||
3480 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3481 | assert(u); | |
3482 | assert(name); | |
3483 | ||
8367fea5 | 3484 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3485 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
a5a8776a | 3486 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
05e343b7 LP |
3487 | } |
3488 | ||
a16e1123 LP |
3489 | bool unit_can_serialize(Unit *u) { |
3490 | assert(u); | |
3491 | ||
3492 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
3493 | } | |
3494 | ||
d68c645b | 3495 | static int serialize_cgroup_mask(FILE *f, const char *key, CGroupMask mask) { |
8b108bd0 | 3496 | _cleanup_free_ char *s = NULL; |
d68c645b | 3497 | int r; |
8b108bd0 FB |
3498 | |
3499 | assert(f); | |
3500 | assert(key); | |
3501 | ||
d68c645b LP |
3502 | if (mask == 0) |
3503 | return 0; | |
3504 | ||
3505 | r = cg_mask_to_string(mask, &s); | |
3506 | if (r < 0) | |
3507 | return log_error_errno(r, "Failed to format cgroup mask: %m"); | |
3508 | ||
3509 | return serialize_item(f, key, s); | |
8b108bd0 FB |
3510 | } |
3511 | ||
b82f71c7 | 3512 | static const char *const ip_accounting_metric_field[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { |
6b659ed8 LP |
3513 | [CGROUP_IP_INGRESS_BYTES] = "ip-accounting-ingress-bytes", |
3514 | [CGROUP_IP_INGRESS_PACKETS] = "ip-accounting-ingress-packets", | |
3515 | [CGROUP_IP_EGRESS_BYTES] = "ip-accounting-egress-bytes", | |
3516 | [CGROUP_IP_EGRESS_PACKETS] = "ip-accounting-egress-packets", | |
3517 | }; | |
3518 | ||
fbe14fc9 LP |
3519 | static const char *const io_accounting_metric_field_base[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
3520 | [CGROUP_IO_READ_BYTES] = "io-accounting-read-bytes-base", | |
3521 | [CGROUP_IO_WRITE_BYTES] = "io-accounting-write-bytes-base", | |
3522 | [CGROUP_IO_READ_OPERATIONS] = "io-accounting-read-operations-base", | |
3523 | [CGROUP_IO_WRITE_OPERATIONS] = "io-accounting-write-operations-base", | |
3524 | }; | |
3525 | ||
3526 | static const char *const io_accounting_metric_field_last[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { | |
3527 | [CGROUP_IO_READ_BYTES] = "io-accounting-read-bytes-last", | |
3528 | [CGROUP_IO_WRITE_BYTES] = "io-accounting-write-bytes-last", | |
3529 | [CGROUP_IO_READ_OPERATIONS] = "io-accounting-read-operations-last", | |
3530 | [CGROUP_IO_WRITE_OPERATIONS] = "io-accounting-write-operations-last", | |
3531 | }; | |
3532 | ||
6b78f9b4 | 3533 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
6b659ed8 | 3534 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3535 | int r; |
3536 | ||
3537 | assert(u); | |
3538 | assert(f); | |
3539 | assert(fds); | |
3540 | ||
9bdb98c5 | 3541 | if (unit_can_serialize(u)) { |
9bdb98c5 | 3542 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
3543 | if (r < 0) |
3544 | return r; | |
e0209d83 MS |
3545 | } |
3546 | ||
d68c645b | 3547 | (void) serialize_dual_timestamp(f, "state-change-timestamp", &u->state_change_timestamp); |
a483fb59 | 3548 | |
d68c645b LP |
3549 | (void) serialize_dual_timestamp(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
3550 | (void) serialize_dual_timestamp(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
3551 | (void) serialize_dual_timestamp(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
3552 | (void) serialize_dual_timestamp(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
a483fb59 | 3553 | |
d68c645b LP |
3554 | (void) serialize_dual_timestamp(f, "condition-timestamp", &u->condition_timestamp); |
3555 | (void) serialize_dual_timestamp(f, "assert-timestamp", &u->assert_timestamp); | |
2791a8f8 | 3556 | |
ac155bb8 | 3557 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
d68c645b | 3558 | (void) serialize_bool(f, "condition-result", u->condition_result); |
10717a1a | 3559 | |
59fccdc5 | 3560 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
d68c645b | 3561 | (void) serialize_bool(f, "assert-result", u->assert_result); |
59fccdc5 | 3562 | |
d68c645b LP |
3563 | (void) serialize_bool(f, "transient", u->transient); |
3564 | (void) serialize_bool(f, "in-audit", u->in_audit); | |
fe700f46 | 3565 | |
d68c645b LP |
3566 | (void) serialize_bool(f, "exported-invocation-id", u->exported_invocation_id); |
3567 | (void) serialize_bool(f, "exported-log-level-max", u->exported_log_level_max); | |
3568 | (void) serialize_bool(f, "exported-log-extra-fields", u->exported_log_extra_fields); | |
5ac1530e ZJS |
3569 | (void) serialize_bool(f, "exported-log-rate-limit-interval", u->exported_log_ratelimit_interval); |
3570 | (void) serialize_bool(f, "exported-log-rate-limit-burst", u->exported_log_ratelimit_burst); | |
0e699122 | 3571 | |
d68c645b | 3572 | (void) serialize_item_format(f, "cpu-usage-base", "%" PRIu64, u->cpu_usage_base); |
fe700f46 | 3573 | if (u->cpu_usage_last != NSEC_INFINITY) |
d68c645b | 3574 | (void) serialize_item_format(f, "cpu-usage-last", "%" PRIu64, u->cpu_usage_last); |
c2756a68 | 3575 | |
afcfaa69 LP |
3576 | if (u->oom_kill_last > 0) |
3577 | (void) serialize_item_format(f, "oom-kill-last", "%" PRIu64, u->oom_kill_last); | |
3578 | ||
fbe14fc9 LP |
3579 | for (CGroupIOAccountingMetric im = 0; im < _CGROUP_IO_ACCOUNTING_METRIC_MAX; im++) { |
3580 | (void) serialize_item_format(f, io_accounting_metric_field_base[im], "%" PRIu64, u->io_accounting_base[im]); | |
3581 | ||
3582 | if (u->io_accounting_last[im] != UINT64_MAX) | |
3583 | (void) serialize_item_format(f, io_accounting_metric_field_last[im], "%" PRIu64, u->io_accounting_last[im]); | |
3584 | } | |
3585 | ||
c2756a68 | 3586 | if (u->cgroup_path) |
d68c645b LP |
3587 | (void) serialize_item(f, "cgroup", u->cgroup_path); |
3588 | ||
3589 | (void) serialize_bool(f, "cgroup-realized", u->cgroup_realized); | |
3590 | (void) serialize_cgroup_mask(f, "cgroup-realized-mask", u->cgroup_realized_mask); | |
3591 | (void) serialize_cgroup_mask(f, "cgroup-enabled-mask", u->cgroup_enabled_mask); | |
3592 | (void) serialize_cgroup_mask(f, "cgroup-invalidated-mask", u->cgroup_invalidated_mask); | |
c2756a68 | 3593 | |
00d9ef85 | 3594 | if (uid_is_valid(u->ref_uid)) |
d68c645b | 3595 | (void) serialize_item_format(f, "ref-uid", UID_FMT, u->ref_uid); |
00d9ef85 | 3596 | if (gid_is_valid(u->ref_gid)) |
d68c645b | 3597 | (void) serialize_item_format(f, "ref-gid", GID_FMT, u->ref_gid); |
00d9ef85 | 3598 | |
4b58153d | 3599 | if (!sd_id128_is_null(u->invocation_id)) |
d68c645b | 3600 | (void) serialize_item_format(f, "invocation-id", SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(u->invocation_id)); |
4b58153d | 3601 | |
d9e45bc3 MS |
3602 | (void) serialize_item_format(f, "freezer-state", "%s", freezer_state_to_string(unit_freezer_state(u))); |
3603 | ||
05a98afd LP |
3604 | bus_track_serialize(u->bus_track, f, "ref"); |
3605 | ||
6b659ed8 LP |
3606 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
3607 | uint64_t v; | |
3608 | ||
3609 | r = unit_get_ip_accounting(u, m, &v); | |
3610 | if (r >= 0) | |
d68c645b | 3611 | (void) serialize_item_format(f, ip_accounting_metric_field[m], "%" PRIu64, v); |
6b659ed8 LP |
3612 | } |
3613 | ||
613b411c LP |
3614 | if (serialize_jobs) { |
3615 | if (u->job) { | |
d68c645b | 3616 | fputs("job\n", f); |
05a98afd | 3617 | job_serialize(u->job, f); |
613b411c LP |
3618 | } |
3619 | ||
3620 | if (u->nop_job) { | |
d68c645b | 3621 | fputs("job\n", f); |
05a98afd | 3622 | job_serialize(u->nop_job, f); |
613b411c LP |
3623 | } |
3624 | } | |
3625 | ||
a16e1123 LP |
3626 | /* End marker */ |
3627 | fputc('\n', f); | |
3628 | return 0; | |
3629 | } | |
3630 | ||
b17c9620 LP |
3631 | static int unit_deserialize_job(Unit *u, FILE *f) { |
3632 | _cleanup_(job_freep) Job *j = NULL; | |
3633 | int r; | |
3634 | ||
3635 | assert(u); | |
3636 | assert(f); | |
3637 | ||
3638 | j = job_new_raw(u); | |
3639 | if (!j) | |
3640 | return log_oom(); | |
3641 | ||
3642 | r = job_deserialize(j, f); | |
3643 | if (r < 0) | |
3644 | return r; | |
3645 | ||
3646 | r = job_install_deserialized(j); | |
3647 | if (r < 0) | |
3648 | return r; | |
3649 | ||
3650 | TAKE_PTR(j); | |
3651 | return 0; | |
3652 | } | |
3653 | ||
a16e1123 LP |
3654 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
3655 | int r; | |
3656 | ||
3657 | assert(u); | |
3658 | assert(f); | |
3659 | assert(fds); | |
3660 | ||
a16e1123 | 3661 | for (;;) { |
8948b341 | 3662 | _cleanup_free_ char *line = NULL; |
8948b341 | 3663 | char *l, *v; |
83f18c91 | 3664 | ssize_t m; |
a16e1123 LP |
3665 | size_t k; |
3666 | ||
8948b341 LP |
3667 | r = read_line(f, LONG_LINE_MAX, &line); |
3668 | if (r < 0) | |
3669 | return log_error_errno(r, "Failed to read serialization line: %m"); | |
3670 | if (r == 0) /* eof */ | |
3671 | break; | |
a16e1123 LP |
3672 | |
3673 | l = strstrip(line); | |
8948b341 | 3674 | if (isempty(l)) /* End marker */ |
a483fb59 | 3675 | break; |
a16e1123 LP |
3676 | |
3677 | k = strcspn(l, "="); | |
3678 | ||
3679 | if (l[k] == '=') { | |
3680 | l[k] = 0; | |
3681 | v = l+k+1; | |
3682 | } else | |
3683 | v = l+k; | |
3684 | ||
cca098b0 | 3685 | if (streq(l, "job")) { |
39a18c60 | 3686 | if (v[0] == '\0') { |
b17c9620 LP |
3687 | /* New-style serialized job */ |
3688 | r = unit_deserialize_job(u, f); | |
3689 | if (r < 0) | |
e0209d83 | 3690 | return r; |
b17c9620 | 3691 | } else /* Legacy for pre-44 */ |
ed10fa8c | 3692 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); |
cca098b0 | 3693 | continue; |
a483fb59 | 3694 | } else if (streq(l, "state-change-timestamp")) { |
d68c645b | 3695 | (void) deserialize_dual_timestamp(v, &u->state_change_timestamp); |
a483fb59 | 3696 | continue; |
8aaf019b | 3697 | } else if (streq(l, "inactive-exit-timestamp")) { |
d68c645b | 3698 | (void) deserialize_dual_timestamp(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
3699 | continue; |
3700 | } else if (streq(l, "active-enter-timestamp")) { | |
d68c645b | 3701 | (void) deserialize_dual_timestamp(v, &u->active_enter_timestamp); |
8aaf019b LP |
3702 | continue; |
3703 | } else if (streq(l, "active-exit-timestamp")) { | |
d68c645b | 3704 | (void) deserialize_dual_timestamp(v, &u->active_exit_timestamp); |
8aaf019b LP |
3705 | continue; |
3706 | } else if (streq(l, "inactive-enter-timestamp")) { | |
d68c645b | 3707 | (void) deserialize_dual_timestamp(v, &u->inactive_enter_timestamp); |
8aaf019b | 3708 | continue; |
2791a8f8 | 3709 | } else if (streq(l, "condition-timestamp")) { |
d68c645b | 3710 | (void) deserialize_dual_timestamp(v, &u->condition_timestamp); |
2791a8f8 | 3711 | continue; |
59fccdc5 | 3712 | } else if (streq(l, "assert-timestamp")) { |
d68c645b | 3713 | (void) deserialize_dual_timestamp(v, &u->assert_timestamp); |
59fccdc5 | 3714 | continue; |
2791a8f8 | 3715 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 3716 | |
e911de99 LP |
3717 | r = parse_boolean(v); |
3718 | if (r < 0) | |
f2341e0a | 3719 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 3720 | else |
e911de99 | 3721 | u->condition_result = r; |
efbac6d2 LP |
3722 | |
3723 | continue; | |
c2756a68 | 3724 | |
59fccdc5 | 3725 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 3726 | |
e911de99 LP |
3727 | r = parse_boolean(v); |
3728 | if (r < 0) | |
f2341e0a | 3729 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 3730 | else |
e911de99 | 3731 | u->assert_result = r; |
59fccdc5 LP |
3732 | |
3733 | continue; | |
3734 | ||
c2756a68 | 3735 | } else if (streq(l, "transient")) { |
c2756a68 | 3736 | |
e911de99 LP |
3737 | r = parse_boolean(v); |
3738 | if (r < 0) | |
f2341e0a | 3739 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 3740 | else |
e911de99 | 3741 | u->transient = r; |
c2756a68 LP |
3742 | |
3743 | continue; | |
e911de99 | 3744 | |
0e699122 LP |
3745 | } else if (streq(l, "in-audit")) { |
3746 | ||
3747 | r = parse_boolean(v); | |
3748 | if (r < 0) | |
3749 | log_unit_debug(u, "Failed to parse in-audit bool %s, ignoring.", v); | |
3750 | else | |
3751 | u->in_audit = r; | |
3752 | ||
3753 | continue; | |
3754 | ||
d3070fbd LP |
3755 | } else if (streq(l, "exported-invocation-id")) { |
3756 | ||
3757 | r = parse_boolean(v); | |
3758 | if (r < 0) | |
3759 | log_unit_debug(u, "Failed to parse exported invocation ID bool %s, ignoring.", v); | |
3760 | else | |
3761 | u->exported_invocation_id = r; | |
3762 | ||
3763 | continue; | |
3764 | ||
3765 | } else if (streq(l, "exported-log-level-max")) { | |
3766 | ||
3767 | r = parse_boolean(v); | |
3768 | if (r < 0) | |
3769 | log_unit_debug(u, "Failed to parse exported log level max bool %s, ignoring.", v); | |
3770 | else | |
3771 | u->exported_log_level_max = r; | |
3772 | ||
3773 | continue; | |
3774 | ||
3775 | } else if (streq(l, "exported-log-extra-fields")) { | |
3776 | ||
3777 | r = parse_boolean(v); | |
3778 | if (r < 0) | |
3779 | log_unit_debug(u, "Failed to parse exported log extra fields bool %s, ignoring.", v); | |
3780 | else | |
3781 | u->exported_log_extra_fields = r; | |
3782 | ||
3783 | continue; | |
3784 | ||
90fc172e AZ |
3785 | } else if (streq(l, "exported-log-rate-limit-interval")) { |
3786 | ||
3787 | r = parse_boolean(v); | |
3788 | if (r < 0) | |
3789 | log_unit_debug(u, "Failed to parse exported log rate limit interval %s, ignoring.", v); | |
3790 | else | |
5ac1530e | 3791 | u->exported_log_ratelimit_interval = r; |
90fc172e AZ |
3792 | |
3793 | continue; | |
3794 | ||
3795 | } else if (streq(l, "exported-log-rate-limit-burst")) { | |
3796 | ||
3797 | r = parse_boolean(v); | |
3798 | if (r < 0) | |
3799 | log_unit_debug(u, "Failed to parse exported log rate limit burst %s, ignoring.", v); | |
3800 | else | |
5ac1530e | 3801 | u->exported_log_ratelimit_burst = r; |
90fc172e AZ |
3802 | |
3803 | continue; | |
3804 | ||
fe700f46 | 3805 | } else if (STR_IN_SET(l, "cpu-usage-base", "cpuacct-usage-base")) { |
5ad096b3 | 3806 | |
66ebf6c0 | 3807 | r = safe_atou64(v, &u->cpu_usage_base); |
5ad096b3 | 3808 | if (r < 0) |
fe700f46 LP |
3809 | log_unit_debug(u, "Failed to parse CPU usage base %s, ignoring.", v); |
3810 | ||
3811 | continue; | |
3812 | ||
3813 | } else if (streq(l, "cpu-usage-last")) { | |
3814 | ||
3815 | r = safe_atou64(v, &u->cpu_usage_last); | |
3816 | if (r < 0) | |
3817 | log_unit_debug(u, "Failed to read CPU usage last %s, ignoring.", v); | |
5ad096b3 | 3818 | |
0f908397 | 3819 | continue; |
4e595329 | 3820 | |
afcfaa69 LP |
3821 | } else if (streq(l, "oom-kill-last")) { |
3822 | ||
3823 | r = safe_atou64(v, &u->oom_kill_last); | |
3824 | if (r < 0) | |
3825 | log_unit_debug(u, "Failed to read OOM kill last %s, ignoring.", v); | |
3826 | ||
3827 | continue; | |
3828 | ||
e911de99 | 3829 | } else if (streq(l, "cgroup")) { |
72673e86 | 3830 | |
e911de99 LP |
3831 | r = unit_set_cgroup_path(u, v); |
3832 | if (r < 0) | |
f2341e0a | 3833 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 3834 | |
efdb0237 | 3835 | (void) unit_watch_cgroup(u); |
afcfaa69 | 3836 | (void) unit_watch_cgroup_memory(u); |
efdb0237 | 3837 | |
de1d4f9b WF |
3838 | continue; |
3839 | } else if (streq(l, "cgroup-realized")) { | |
3840 | int b; | |
3841 | ||
3842 | b = parse_boolean(v); | |
3843 | if (b < 0) | |
3844 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
3845 | else | |
3846 | u->cgroup_realized = b; | |
3847 | ||
c2756a68 | 3848 | continue; |
00d9ef85 | 3849 | |
8b108bd0 FB |
3850 | } else if (streq(l, "cgroup-realized-mask")) { |
3851 | ||
3852 | r = cg_mask_from_string(v, &u->cgroup_realized_mask); | |
3853 | if (r < 0) | |
3854 | log_unit_debug(u, "Failed to parse cgroup-realized-mask %s, ignoring.", v); | |
3855 | continue; | |
3856 | ||
3857 | } else if (streq(l, "cgroup-enabled-mask")) { | |
3858 | ||
3859 | r = cg_mask_from_string(v, &u->cgroup_enabled_mask); | |
3860 | if (r < 0) | |
3861 | log_unit_debug(u, "Failed to parse cgroup-enabled-mask %s, ignoring.", v); | |
3862 | continue; | |
3863 | ||
17f14955 | 3864 | } else if (streq(l, "cgroup-invalidated-mask")) { |
906c06f6 | 3865 | |
17f14955 | 3866 | r = cg_mask_from_string(v, &u->cgroup_invalidated_mask); |
906c06f6 | 3867 | if (r < 0) |
17f14955 | 3868 | log_unit_debug(u, "Failed to parse cgroup-invalidated-mask %s, ignoring.", v); |
906c06f6 DM |
3869 | continue; |
3870 | ||
00d9ef85 LP |
3871 | } else if (streq(l, "ref-uid")) { |
3872 | uid_t uid; | |
3873 | ||
3874 | r = parse_uid(v, &uid); | |
3875 | if (r < 0) | |
3876 | log_unit_debug(u, "Failed to parse referenced UID %s, ignoring.", v); | |
3877 | else | |
3878 | unit_ref_uid_gid(u, uid, GID_INVALID); | |
3879 | ||
3880 | continue; | |
3881 | ||
3882 | } else if (streq(l, "ref-gid")) { | |
3883 | gid_t gid; | |
3884 | ||
3885 | r = parse_gid(v, &gid); | |
3886 | if (r < 0) | |
3887 | log_unit_debug(u, "Failed to parse referenced GID %s, ignoring.", v); | |
3888 | else | |
3889 | unit_ref_uid_gid(u, UID_INVALID, gid); | |
3890 | ||
5f616d5f LP |
3891 | continue; |
3892 | ||
05a98afd LP |
3893 | } else if (streq(l, "ref")) { |
3894 | ||
3895 | r = strv_extend(&u->deserialized_refs, v); | |
3896 | if (r < 0) | |
d68c645b | 3897 | return log_oom(); |
05a98afd | 3898 | |
4b58153d LP |
3899 | continue; |
3900 | } else if (streq(l, "invocation-id")) { | |
3901 | sd_id128_t id; | |
3902 | ||
3903 | r = sd_id128_from_string(v, &id); | |
3904 | if (r < 0) | |
3905 | log_unit_debug(u, "Failed to parse invocation id %s, ignoring.", v); | |
3906 | else { | |
3907 | r = unit_set_invocation_id(u, id); | |
3908 | if (r < 0) | |
3909 | log_unit_warning_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
3910 | } | |
3911 | ||
d9e45bc3 MS |
3912 | continue; |
3913 | } else if (streq(l, "freezer-state")) { | |
3914 | FreezerState s; | |
3915 | ||
3916 | s = freezer_state_from_string(v); | |
3917 | if (s < 0) | |
3918 | log_unit_debug(u, "Failed to deserialize freezer-state '%s', ignoring.", v); | |
3919 | else | |
3920 | u->freezer_state = s; | |
3921 | ||
00d9ef85 | 3922 | continue; |
8aaf019b | 3923 | } |
cca098b0 | 3924 | |
6b659ed8 | 3925 | /* Check if this is an IP accounting metric serialization field */ |
83f18c91 LP |
3926 | m = string_table_lookup(ip_accounting_metric_field, ELEMENTSOF(ip_accounting_metric_field), l); |
3927 | if (m >= 0) { | |
6b659ed8 LP |
3928 | uint64_t c; |
3929 | ||
3930 | r = safe_atou64(v, &c); | |
3931 | if (r < 0) | |
3932 | log_unit_debug(u, "Failed to parse IP accounting value %s, ignoring.", v); | |
3933 | else | |
3934 | u->ip_accounting_extra[m] = c; | |
3935 | continue; | |
3936 | } | |
3937 | ||
fbe14fc9 LP |
3938 | m = string_table_lookup(io_accounting_metric_field_base, ELEMENTSOF(io_accounting_metric_field_base), l); |
3939 | if (m >= 0) { | |
3940 | uint64_t c; | |
3941 | ||
3942 | r = safe_atou64(v, &c); | |
3943 | if (r < 0) | |
3944 | log_unit_debug(u, "Failed to parse IO accounting base value %s, ignoring.", v); | |
3945 | else | |
3946 | u->io_accounting_base[m] = c; | |
3947 | continue; | |
3948 | } | |
3949 | ||
3950 | m = string_table_lookup(io_accounting_metric_field_last, ELEMENTSOF(io_accounting_metric_field_last), l); | |
3951 | if (m >= 0) { | |
3952 | uint64_t c; | |
3953 | ||
3954 | r = safe_atou64(v, &c); | |
3955 | if (r < 0) | |
3956 | log_unit_debug(u, "Failed to parse IO accounting last value %s, ignoring.", v); | |
3957 | else | |
3958 | u->io_accounting_last[m] = c; | |
3959 | continue; | |
3960 | } | |
3961 | ||
9bdb98c5 | 3962 | if (unit_can_serialize(u)) { |
e8a565cb YW |
3963 | r = exec_runtime_deserialize_compat(u, l, v, fds); |
3964 | if (r < 0) { | |
3965 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); | |
3966 | continue; | |
9bdb98c5 LP |
3967 | } |
3968 | ||
e8a565cb YW |
3969 | /* Returns positive if key was handled by the call */ |
3970 | if (r > 0) | |
3971 | continue; | |
3972 | ||
9bdb98c5 | 3973 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); |
613b411c | 3974 | if (r < 0) |
f2341e0a | 3975 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 3976 | } |
a16e1123 | 3977 | } |
a483fb59 LP |
3978 | |
3979 | /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is | |
3980 | * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from | |
1f133e0d | 3981 | * before 228 where the base for timeouts was not persistent across reboots. */ |
a483fb59 LP |
3982 | |
3983 | if (!dual_timestamp_is_set(&u->state_change_timestamp)) | |
3984 | dual_timestamp_get(&u->state_change_timestamp); | |
3985 | ||
58d83430 LP |
3986 | /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied |
3987 | * after we are done. For that we invalidate anything already realized, so that we can realize it again. */ | |
3988 | unit_invalidate_cgroup(u, _CGROUP_MASK_ALL); | |
3989 | unit_invalidate_cgroup_bpf(u); | |
3990 | ||
a483fb59 | 3991 | return 0; |
a16e1123 LP |
3992 | } |
3993 | ||
8948b341 LP |
3994 | int unit_deserialize_skip(FILE *f) { |
3995 | int r; | |
07429866 ZJS |
3996 | assert(f); |
3997 | ||
3998 | /* Skip serialized data for this unit. We don't know what it is. */ | |
3999 | ||
4000 | for (;;) { | |
8948b341 LP |
4001 | _cleanup_free_ char *line = NULL; |
4002 | char *l; | |
07429866 | 4003 | |
8948b341 LP |
4004 | r = read_line(f, LONG_LINE_MAX, &line); |
4005 | if (r < 0) | |
4006 | return log_error_errno(r, "Failed to read serialization line: %m"); | |
4007 | if (r == 0) | |
4008 | return 0; | |
07429866 | 4009 | |
07429866 ZJS |
4010 | l = strstrip(line); |
4011 | ||
4012 | /* End marker */ | |
4013 | if (isempty(l)) | |
8948b341 | 4014 | return 1; |
07429866 ZJS |
4015 | } |
4016 | } | |
4017 | ||
d336ba9f | 4018 | int unit_add_node_dependency(Unit *u, const char *what, UnitDependency dep, UnitDependencyMask mask) { |
68eda4bd | 4019 | _cleanup_free_ char *e = NULL; |
44b0d1fd | 4020 | Unit *device; |
6e2ef85b LP |
4021 | int r; |
4022 | ||
4023 | assert(u); | |
4024 | ||
6e2ef85b | 4025 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
4026 | if (isempty(what)) |
4027 | return 0; | |
6e2ef85b | 4028 | |
8407a5d0 | 4029 | if (!is_device_path(what)) |
6e2ef85b LP |
4030 | return 0; |
4031 | ||
44b0d1fd | 4032 | /* When device units aren't supported (such as in a container), don't create dependencies on them. */ |
1c2e9646 | 4033 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
4034 | return 0; |
4035 | ||
7410616c LP |
4036 | r = unit_name_from_path(what, ".device", &e); |
4037 | if (r < 0) | |
4038 | return r; | |
6e2ef85b | 4039 | |
ac155bb8 | 4040 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
4041 | if (r < 0) |
4042 | return r; | |
4043 | ||
ebc8968b FB |
4044 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
4045 | dep = UNIT_BINDS_TO; | |
4046 | ||
d336ba9f FB |
4047 | return unit_add_two_dependencies(u, UNIT_AFTER, |
4048 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, | |
4049 | device, true, mask); | |
6e2ef85b | 4050 | } |
a16e1123 | 4051 | |
44b0d1fd LP |
4052 | int unit_add_blockdev_dependency(Unit *u, const char *what, UnitDependencyMask mask) { |
4053 | _cleanup_free_ char *escaped = NULL, *target = NULL; | |
4054 | int r; | |
4055 | ||
4056 | assert(u); | |
4057 | ||
4058 | if (isempty(what)) | |
4059 | return 0; | |
4060 | ||
4061 | if (!path_startswith(what, "/dev/")) | |
4062 | return 0; | |
4063 | ||
4064 | /* If we don't support devices, then also don't bother with blockdev@.target */ | |
4065 | if (!unit_type_supported(UNIT_DEVICE)) | |
4066 | return 0; | |
4067 | ||
4068 | r = unit_name_path_escape(what, &escaped); | |
4069 | if (r < 0) | |
4070 | return r; | |
4071 | ||
4072 | r = unit_name_build("blockdev", escaped, ".target", &target); | |
4073 | if (r < 0) | |
4074 | return r; | |
4075 | ||
4076 | return unit_add_dependency_by_name(u, UNIT_AFTER, target, true, mask); | |
4077 | } | |
4078 | ||
be847e82 | 4079 | int unit_coldplug(Unit *u) { |
05a98afd LP |
4080 | int r = 0, q; |
4081 | char **i; | |
b49e14d5 | 4082 | Job *uj; |
cca098b0 LP |
4083 | |
4084 | assert(u); | |
4085 | ||
f0831ed2 | 4086 | /* Make sure we don't enter a loop, when coldplugging recursively. */ |
f78f265f LP |
4087 | if (u->coldplugged) |
4088 | return 0; | |
4089 | ||
4090 | u->coldplugged = true; | |
4091 | ||
05a98afd LP |
4092 | STRV_FOREACH(i, u->deserialized_refs) { |
4093 | q = bus_unit_track_add_name(u, *i); | |
4094 | if (q < 0 && r >= 0) | |
4095 | r = q; | |
4096 | } | |
4097 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 4098 | |
05a98afd LP |
4099 | if (UNIT_VTABLE(u)->coldplug) { |
4100 | q = UNIT_VTABLE(u)->coldplug(u); | |
4101 | if (q < 0 && r >= 0) | |
4102 | r = q; | |
4103 | } | |
5a6158b6 | 4104 | |
b49e14d5 | 4105 | uj = u->job ?: u->nop_job; |
4106 | if (uj) { | |
4107 | q = job_coldplug(uj); | |
05a98afd LP |
4108 | if (q < 0 && r >= 0) |
4109 | r = q; | |
4110 | } | |
cca098b0 | 4111 | |
05a98afd | 4112 | return r; |
cca098b0 LP |
4113 | } |
4114 | ||
f0831ed2 LP |
4115 | void unit_catchup(Unit *u) { |
4116 | assert(u); | |
4117 | ||
4118 | if (UNIT_VTABLE(u)->catchup) | |
4119 | UNIT_VTABLE(u)->catchup(u); | |
4120 | } | |
4121 | ||
ba25d39e | 4122 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
4123 | struct stat st; |
4124 | ||
4125 | if (!path) | |
4126 | return false; | |
4127 | ||
77969722 LP |
4128 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
4129 | * are never out-of-date. */ | |
4130 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
4131 | return false; | |
4132 | ||
21b95806 ZJS |
4133 | if (stat(path, &st) < 0) |
4134 | /* What, cannot access this anymore? */ | |
4135 | return true; | |
4136 | ||
ba25d39e ZJS |
4137 | if (path_masked) |
4138 | /* For masked files check if they are still so */ | |
4139 | return !null_or_empty(&st); | |
4140 | else | |
3a8db9fe | 4141 | /* For non-empty files check the mtime */ |
87ec20ef | 4142 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
4143 | |
4144 | return false; | |
4145 | } | |
4146 | ||
45fb0699 | 4147 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
4148 | _cleanup_strv_free_ char **t = NULL; |
4149 | char **path; | |
1b64d026 | 4150 | |
45fb0699 LP |
4151 | assert(u); |
4152 | ||
ba25d39e ZJS |
4153 | /* For unit files, we allow masking… */ |
4154 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
4155 | u->load_state == UNIT_MASKED)) | |
21b95806 | 4156 | return true; |
5f4b19f4 | 4157 | |
ba25d39e ZJS |
4158 | /* Source paths should not be masked… */ |
4159 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 4160 | return true; |
ae7a7182 | 4161 | |
19a44dfe LR |
4162 | if (u->load_state == UNIT_LOADED) |
4163 | (void) unit_find_dropin_paths(u, &t); | |
ab932a62 LP |
4164 | if (!strv_equal(u->dropin_paths, t)) |
4165 | return true; | |
6d10d308 | 4166 | |
ba25d39e | 4167 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 4168 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 4169 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 4170 | return true; |
21b95806 | 4171 | |
ab932a62 | 4172 | return false; |
45fb0699 LP |
4173 | } |
4174 | ||
fdf20a31 | 4175 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
4176 | assert(u); |
4177 | ||
fdf20a31 MM |
4178 | if (UNIT_VTABLE(u)->reset_failed) |
4179 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 | 4180 | |
7bf081a1 | 4181 | ratelimit_reset(&u->start_ratelimit); |
6bf0f408 | 4182 | u->start_limit_hit = false; |
5632e374 LP |
4183 | } |
4184 | ||
a7f241db LP |
4185 | Unit *unit_following(Unit *u) { |
4186 | assert(u); | |
4187 | ||
4188 | if (UNIT_VTABLE(u)->following) | |
4189 | return UNIT_VTABLE(u)->following(u); | |
4190 | ||
4191 | return NULL; | |
4192 | } | |
4193 | ||
31afa0a4 | 4194 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
4195 | assert(u); |
4196 | ||
31afa0a4 LP |
4197 | /* This call does check the current state of the unit. It's |
4198 | * hence useful to be called from state change calls of the | |
4199 | * unit itself, where the state isn't updated yet. This is | |
4200 | * different from unit_inactive_or_pending() which checks both | |
4201 | * the current state and for a queued job. */ | |
18ffdfda | 4202 | |
28a2dfe8 | 4203 | return unit_has_job_type(u, JOB_STOP); |
31afa0a4 LP |
4204 | } |
4205 | ||
4206 | bool unit_inactive_or_pending(Unit *u) { | |
4207 | assert(u); | |
4208 | ||
4209 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 4210 | |
d956ac29 LP |
4211 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
4212 | return true; | |
4213 | ||
31afa0a4 | 4214 | if (unit_stop_pending(u)) |
18ffdfda LP |
4215 | return true; |
4216 | ||
4217 | return false; | |
4218 | } | |
4219 | ||
31afa0a4 | 4220 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
4221 | assert(u); |
4222 | ||
f60c2665 | 4223 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
4224 | |
4225 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
4226 | return true; | |
4227 | ||
ac155bb8 | 4228 | if (u->job && |
3742095b | 4229 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
4230 | return true; |
4231 | ||
4232 | return false; | |
4233 | } | |
4234 | ||
52a12341 YW |
4235 | bool unit_will_restart_default(Unit *u) { |
4236 | assert(u); | |
4237 | ||
28a2dfe8 | 4238 | return unit_has_job_type(u, JOB_START); |
52a12341 YW |
4239 | } |
4240 | ||
deb4e708 MK |
4241 | bool unit_will_restart(Unit *u) { |
4242 | assert(u); | |
4243 | ||
4244 | if (!UNIT_VTABLE(u)->will_restart) | |
4245 | return false; | |
4246 | ||
4247 | return UNIT_VTABLE(u)->will_restart(u); | |
4248 | } | |
4249 | ||
718db961 | 4250 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
4251 | assert(u); |
4252 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 4253 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 4254 | |
8a0867d6 | 4255 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 4256 | return -EOPNOTSUPP; |
8a0867d6 | 4257 | |
c74f17d9 | 4258 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
4259 | } |
4260 | ||
82659fd7 | 4261 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
af4fa99d | 4262 | _cleanup_set_free_ Set *pid_set = NULL; |
82659fd7 LP |
4263 | int r; |
4264 | ||
d5099efc | 4265 | pid_set = set_new(NULL); |
82659fd7 LP |
4266 | if (!pid_set) |
4267 | return NULL; | |
4268 | ||
4269 | /* Exclude the main/control pids from being killed via the cgroup */ | |
4270 | if (main_pid > 0) { | |
fea72cc0 | 4271 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 | 4272 | if (r < 0) |
95f14a3e | 4273 | return NULL; |
82659fd7 LP |
4274 | } |
4275 | ||
4276 | if (control_pid > 0) { | |
fea72cc0 | 4277 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 | 4278 | if (r < 0) |
95f14a3e | 4279 | return NULL; |
82659fd7 LP |
4280 | } |
4281 | ||
95f14a3e | 4282 | return TAKE_PTR(pid_set); |
82659fd7 LP |
4283 | } |
4284 | ||
d91c34f2 LP |
4285 | int unit_kill_common( |
4286 | Unit *u, | |
4287 | KillWho who, | |
4288 | int signo, | |
4289 | pid_t main_pid, | |
4290 | pid_t control_pid, | |
718db961 | 4291 | sd_bus_error *error) { |
d91c34f2 | 4292 | |
814cc562 | 4293 | int r = 0; |
ac5e3a50 | 4294 | bool killed = false; |
814cc562 | 4295 | |
ac5e3a50 | 4296 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 4297 | if (main_pid < 0) |
7358dc02 | 4298 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 4299 | else if (main_pid == 0) |
7358dc02 | 4300 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
4301 | } |
4302 | ||
ac5e3a50 | 4303 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 4304 | if (control_pid < 0) |
7358dc02 | 4305 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 4306 | else if (control_pid == 0) |
7358dc02 | 4307 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
4308 | } |
4309 | ||
ac5e3a50 JS |
4310 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
4311 | if (control_pid > 0) { | |
814cc562 MS |
4312 | if (kill(control_pid, signo) < 0) |
4313 | r = -errno; | |
ac5e3a50 JS |
4314 | else |
4315 | killed = true; | |
4316 | } | |
814cc562 | 4317 | |
ac5e3a50 JS |
4318 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
4319 | if (main_pid > 0) { | |
814cc562 MS |
4320 | if (kill(main_pid, signo) < 0) |
4321 | r = -errno; | |
ac5e3a50 JS |
4322 | else |
4323 | killed = true; | |
4324 | } | |
814cc562 | 4325 | |
ac5e3a50 | 4326 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
4327 | _cleanup_set_free_ Set *pid_set = NULL; |
4328 | int q; | |
4329 | ||
82659fd7 LP |
4330 | /* Exclude the main/control pids from being killed via the cgroup */ |
4331 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
4332 | if (!pid_set) |
4333 | return -ENOMEM; | |
4334 | ||
1d98fef1 | 4335 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, NULL, NULL); |
4c701096 | 4336 | if (q < 0 && !IN_SET(q, -EAGAIN, -ESRCH, -ENOENT)) |
814cc562 | 4337 | r = q; |
ac5e3a50 JS |
4338 | else |
4339 | killed = true; | |
814cc562 MS |
4340 | } |
4341 | ||
201f0c91 | 4342 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL)) |
ac5e3a50 JS |
4343 | return -ESRCH; |
4344 | ||
814cc562 MS |
4345 | return r; |
4346 | } | |
4347 | ||
6210e7fc LP |
4348 | int unit_following_set(Unit *u, Set **s) { |
4349 | assert(u); | |
4350 | assert(s); | |
4351 | ||
4352 | if (UNIT_VTABLE(u)->following_set) | |
4353 | return UNIT_VTABLE(u)->following_set(u, s); | |
4354 | ||
4355 | *s = NULL; | |
4356 | return 0; | |
4357 | } | |
4358 | ||
a4375746 | 4359 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
4360 | int r; |
4361 | ||
a4375746 LP |
4362 | assert(u); |
4363 | ||
0ec0deaa LP |
4364 | if (u->unit_file_state < 0 && u->fragment_path) { |
4365 | r = unit_file_get_state( | |
463d0d15 | 4366 | u->manager->unit_file_scope, |
0ec0deaa | 4367 | NULL, |
9ea3a0e7 | 4368 | u->id, |
0ec0deaa LP |
4369 | &u->unit_file_state); |
4370 | if (r < 0) | |
4371 | u->unit_file_state = UNIT_FILE_BAD; | |
4372 | } | |
a4375746 | 4373 | |
ac155bb8 | 4374 | return u->unit_file_state; |
a4375746 LP |
4375 | } |
4376 | ||
d2dc52db LP |
4377 | int unit_get_unit_file_preset(Unit *u) { |
4378 | assert(u); | |
4379 | ||
4380 | if (u->unit_file_preset < 0 && u->fragment_path) | |
4381 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 4382 | u->manager->unit_file_scope, |
0ec0deaa | 4383 | NULL, |
8f7b2566 ZJS |
4384 | basename(u->fragment_path), |
4385 | NULL); | |
d2dc52db LP |
4386 | |
4387 | return u->unit_file_preset; | |
4388 | } | |
4389 | ||
7f7d01ed | 4390 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 4391 | assert(ref); |
7f7d01ed ZJS |
4392 | assert(source); |
4393 | assert(target); | |
57020a3a | 4394 | |
7f7d01ed | 4395 | if (ref->target) |
57020a3a LP |
4396 | unit_ref_unset(ref); |
4397 | ||
7f7d01ed ZJS |
4398 | ref->source = source; |
4399 | ref->target = target; | |
4400 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
4401 | return target; | |
57020a3a LP |
4402 | } |
4403 | ||
4404 | void unit_ref_unset(UnitRef *ref) { | |
4405 | assert(ref); | |
4406 | ||
7f7d01ed | 4407 | if (!ref->target) |
57020a3a LP |
4408 | return; |
4409 | ||
b75102e5 LP |
4410 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
4411 | * be unreferenced now. */ | |
7f7d01ed | 4412 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 4413 | |
7f7d01ed ZJS |
4414 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
4415 | ref->source = ref->target = NULL; | |
57020a3a LP |
4416 | } |
4417 | ||
29206d46 LP |
4418 | static int user_from_unit_name(Unit *u, char **ret) { |
4419 | ||
4420 | static const uint8_t hash_key[] = { | |
4421 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
4422 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
4423 | }; | |
4424 | ||
4425 | _cleanup_free_ char *n = NULL; | |
4426 | int r; | |
4427 | ||
4428 | r = unit_name_to_prefix(u->id, &n); | |
4429 | if (r < 0) | |
4430 | return r; | |
4431 | ||
7a8867ab | 4432 | if (valid_user_group_name(n, 0)) { |
ae2a15bc | 4433 | *ret = TAKE_PTR(n); |
29206d46 LP |
4434 | return 0; |
4435 | } | |
4436 | ||
4437 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
4438 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
4439 | return -ENOMEM; | |
4440 | ||
4441 | return 0; | |
4442 | } | |
4443 | ||
598459ce LP |
4444 | int unit_patch_contexts(Unit *u) { |
4445 | CGroupContext *cc; | |
4446 | ExecContext *ec; | |
cba6e062 LP |
4447 | unsigned i; |
4448 | int r; | |
4449 | ||
e06c73cc | 4450 | assert(u); |
e06c73cc | 4451 | |
598459ce LP |
4452 | /* Patch in the manager defaults into the exec and cgroup |
4453 | * contexts, _after_ the rest of the settings have been | |
4454 | * initialized */ | |
085afe36 | 4455 | |
598459ce LP |
4456 | ec = unit_get_exec_context(u); |
4457 | if (ec) { | |
4458 | /* This only copies in the ones that need memory */ | |
4459 | for (i = 0; i < _RLIMIT_MAX; i++) | |
4460 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
4461 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
4462 | if (!ec->rlimit[i]) | |
4463 | return -ENOMEM; | |
4464 | } | |
4465 | ||
463d0d15 | 4466 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4467 | !ec->working_directory) { |
4468 | ||
4469 | r = get_home_dir(&ec->working_directory); | |
4470 | if (r < 0) | |
4471 | return r; | |
4c08c824 LP |
4472 | |
4473 | /* Allow user services to run, even if the | |
4474 | * home directory is missing */ | |
4475 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4476 | } |
4477 | ||
598459ce | 4478 | if (ec->private_devices) |
2cd0a735 | 4479 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4480 | |
4481 | if (ec->protect_kernel_modules) | |
4482 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 | 4483 | |
84703040 KK |
4484 | if (ec->protect_kernel_logs) |
4485 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYSLOG); | |
4486 | ||
fc64760d KK |
4487 | if (ec->protect_clock) |
4488 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_SYS_TIME) | (UINT64_C(1) << CAP_WAKE_ALARM)); | |
4489 | ||
29206d46 LP |
4490 | if (ec->dynamic_user) { |
4491 | if (!ec->user) { | |
4492 | r = user_from_unit_name(u, &ec->user); | |
4493 | if (r < 0) | |
4494 | return r; | |
4495 | } | |
4496 | ||
4497 | if (!ec->group) { | |
4498 | ec->group = strdup(ec->user); | |
4499 | if (!ec->group) | |
4500 | return -ENOMEM; | |
4501 | } | |
4502 | ||
bf65b7e0 LP |
4503 | /* If the dynamic user option is on, let's make sure that the unit can't leave its |
4504 | * UID/GID around in the file system or on IPC objects. Hence enforce a strict | |
4505 | * sandbox. */ | |
63bb64a0 | 4506 | |
29206d46 | 4507 | ec->private_tmp = true; |
00d9ef85 | 4508 | ec->remove_ipc = true; |
63bb64a0 LP |
4509 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4510 | if (ec->protect_home == PROTECT_HOME_NO) | |
4511 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
bf65b7e0 LP |
4512 | |
4513 | /* Make sure this service can neither benefit from SUID/SGID binaries nor create | |
4514 | * them. */ | |
4515 | ec->no_new_privileges = true; | |
4516 | ec->restrict_suid_sgid = true; | |
29206d46 | 4517 | } |
cba6e062 LP |
4518 | } |
4519 | ||
598459ce | 4520 | cc = unit_get_cgroup_context(u); |
fe65e88b | 4521 | if (cc && ec) { |
f513e420 | 4522 | |
fe65e88b | 4523 | if (ec->private_devices && |
084870f9 ZJS |
4524 | cc->device_policy == CGROUP_DEVICE_POLICY_AUTO) |
4525 | cc->device_policy = CGROUP_DEVICE_POLICY_CLOSED; | |
fe65e88b | 4526 | |
b3d13314 | 4527 | if ((ec->root_image || !LIST_IS_EMPTY(ec->mount_images)) && |
084870f9 | 4528 | (cc->device_policy != CGROUP_DEVICE_POLICY_AUTO || cc->device_allow)) { |
0cffae95 | 4529 | const char *p; |
fe65e88b | 4530 | |
b3d13314 | 4531 | /* When RootImage= or MountImages= is specified, the following devices are touched. */ |
0cffae95 LB |
4532 | FOREACH_STRING(p, "/dev/loop-control", "/dev/mapper/control") { |
4533 | r = cgroup_add_device_allow(cc, p, "rw"); | |
4534 | if (r < 0) | |
4535 | return r; | |
4536 | } | |
4537 | FOREACH_STRING(p, "block-loop", "block-blkext", "block-device-mapper") { | |
4538 | r = cgroup_add_device_allow(cc, p, "rwm"); | |
4539 | if (r < 0) | |
4540 | return r; | |
4541 | } | |
867af728 | 4542 | |
0cffae95 LB |
4543 | /* Make sure "block-loop" can be resolved, i.e. make sure "loop" shows up in /proc/devices. |
4544 | * Same for mapper and verity. */ | |
4545 | FOREACH_STRING(p, "modprobe@loop.service", "modprobe@dm_mod.service", "modprobe@dm_verity.service") { | |
4546 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, p, true, UNIT_DEPENDENCY_FILE); | |
4547 | if (r < 0) | |
4548 | return r; | |
4549 | } | |
fe65e88b | 4550 | } |
fc64760d KK |
4551 | |
4552 | if (ec->protect_clock) { | |
4553 | r = cgroup_add_device_allow(cc, "char-rtc", "r"); | |
4554 | if (r < 0) | |
4555 | return r; | |
4556 | } | |
598459ce | 4557 | } |
f1660f96 | 4558 | |
cba6e062 | 4559 | return 0; |
e06c73cc LP |
4560 | } |
4561 | ||
3ef63c31 LP |
4562 | ExecContext *unit_get_exec_context(Unit *u) { |
4563 | size_t offset; | |
4564 | assert(u); | |
4565 | ||
598459ce LP |
4566 | if (u->type < 0) |
4567 | return NULL; | |
4568 | ||
3ef63c31 LP |
4569 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4570 | if (offset <= 0) | |
4571 | return NULL; | |
4572 | ||
4573 | return (ExecContext*) ((uint8_t*) u + offset); | |
4574 | } | |
4575 | ||
718db961 LP |
4576 | KillContext *unit_get_kill_context(Unit *u) { |
4577 | size_t offset; | |
4578 | assert(u); | |
4579 | ||
598459ce LP |
4580 | if (u->type < 0) |
4581 | return NULL; | |
4582 | ||
718db961 LP |
4583 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4584 | if (offset <= 0) | |
4585 | return NULL; | |
4586 | ||
4587 | return (KillContext*) ((uint8_t*) u + offset); | |
4588 | } | |
4589 | ||
4ad49000 LP |
4590 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4591 | size_t offset; | |
4592 | ||
598459ce LP |
4593 | if (u->type < 0) |
4594 | return NULL; | |
4595 | ||
4ad49000 LP |
4596 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4597 | if (offset <= 0) | |
4598 | return NULL; | |
4599 | ||
4600 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4601 | } | |
4602 | ||
613b411c LP |
4603 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4604 | size_t offset; | |
4605 | ||
598459ce LP |
4606 | if (u->type < 0) |
4607 | return NULL; | |
4608 | ||
613b411c LP |
4609 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4610 | if (offset <= 0) | |
4611 | return NULL; | |
4612 | ||
4613 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4614 | } | |
4615 | ||
2e59b241 | 4616 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4617 | assert(u); |
4618 | ||
2e59b241 | 4619 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4620 | return NULL; |
4621 | ||
39591351 LP |
4622 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4623 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4624 | |
2e59b241 | 4625 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4626 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4627 | |
2e59b241 LP |
4628 | if (flags & UNIT_RUNTIME) |
4629 | return u->manager->lookup_paths.runtime_control; | |
4630 | ||
39591351 | 4631 | return NULL; |
71645aca LP |
4632 | } |
4633 | ||
2e59b241 LP |
4634 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4635 | char *ret = NULL; | |
4636 | ||
4637 | if (!s) | |
4638 | return NULL; | |
4639 | ||
4640 | /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated | |
4641 | * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is | |
4642 | * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly | |
4643 | * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is | |
4644 | * not specified, then the return value always needs to be freed. Callers can use this to optimize memory | |
4645 | * allocations. */ | |
4646 | ||
4647 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
4648 | ret = specifier_escape(s); | |
4649 | if (!ret) | |
4650 | return NULL; | |
4651 | ||
4652 | s = ret; | |
4653 | } | |
4654 | ||
4655 | if (flags & UNIT_ESCAPE_C) { | |
4656 | char *a; | |
4657 | ||
4658 | a = cescape(s); | |
4659 | free(ret); | |
4660 | if (!a) | |
4661 | return NULL; | |
4662 | ||
4663 | ret = a; | |
4664 | } | |
4665 | ||
4666 | if (buf) { | |
4667 | *buf = ret; | |
4668 | return ret ?: (char*) s; | |
4669 | } | |
4670 | ||
4671 | return ret ?: strdup(s); | |
4672 | } | |
4673 | ||
4674 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4675 | _cleanup_free_ char *result = NULL; | |
4676 | size_t n = 0, allocated = 0; | |
ae2a15bc | 4677 | char **i; |
2e59b241 LP |
4678 | |
4679 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a | |
4680 | * way suitable for ExecStart= stanzas */ | |
4681 | ||
4682 | STRV_FOREACH(i, l) { | |
4683 | _cleanup_free_ char *buf = NULL; | |
4684 | const char *p; | |
4685 | size_t a; | |
4686 | char *q; | |
4687 | ||
4688 | p = unit_escape_setting(*i, flags, &buf); | |
4689 | if (!p) | |
4690 | return NULL; | |
4691 | ||
4692 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
4693 | if (!GREEDY_REALLOC(result, allocated, n + a + 1)) | |
4694 | return NULL; | |
4695 | ||
4696 | q = result + n; | |
4697 | if (n > 0) | |
4698 | *(q++) = ' '; | |
4699 | ||
4700 | *(q++) = '"'; | |
4701 | q = stpcpy(q, p); | |
4702 | *(q++) = '"'; | |
4703 | ||
4704 | n += a; | |
4705 | } | |
4706 | ||
4707 | if (!GREEDY_REALLOC(result, allocated, n + 1)) | |
4708 | return NULL; | |
4709 | ||
4710 | result[n] = 0; | |
4711 | ||
ae2a15bc | 4712 | return TAKE_PTR(result); |
2e59b241 LP |
4713 | } |
4714 | ||
4715 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4716 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4717 | const char *dir, *wrapped; |
26d04f86 | 4718 | int r; |
71645aca LP |
4719 | |
4720 | assert(u); | |
2e59b241 LP |
4721 | assert(name); |
4722 | assert(data); | |
4723 | ||
4724 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4725 | return 0; | |
4726 | ||
4727 | data = unit_escape_setting(data, flags, &escaped); | |
4728 | if (!data) | |
4729 | return -ENOMEM; | |
4730 | ||
4731 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4732 | * previous section header is the same */ | |
4733 | ||
4734 | if (flags & UNIT_PRIVATE) { | |
4735 | if (!UNIT_VTABLE(u)->private_section) | |
4736 | return -EINVAL; | |
4737 | ||
4738 | if (!u->transient_file || u->last_section_private < 0) | |
4739 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4740 | else if (u->last_section_private == 0) | |
4741 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4742 | } else { | |
4743 | if (!u->transient_file || u->last_section_private < 0) | |
4744 | data = strjoina("[Unit]\n", data); | |
4745 | else if (u->last_section_private > 0) | |
4746 | data = strjoina("\n[Unit]\n", data); | |
4747 | } | |
71645aca | 4748 | |
4f4afc88 LP |
4749 | if (u->transient_file) { |
4750 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4751 | * write to the transient unit file. */ | |
4752 | fputs(data, u->transient_file); | |
4f4afc88 | 4753 | |
2e59b241 LP |
4754 | if (!endswith(data, "\n")) |
4755 | fputc('\n', u->transient_file); | |
4756 | ||
4757 | /* Remember which section we wrote this entry to */ | |
4758 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4759 | return 0; |
2e59b241 | 4760 | } |
8e2af478 | 4761 | |
2e59b241 | 4762 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4763 | if (!dir) |
4764 | return -EINVAL; | |
71645aca | 4765 | |
2a9a6f8a | 4766 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4767 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4768 | data, |
4769 | "\n"); | |
e20b2a86 | 4770 | |
815b09d3 | 4771 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4772 | if (r < 0) |
4773 | return r; | |
4774 | ||
45639f1b | 4775 | (void) mkdir_p_label(p, 0755); |
4dba44a5 ZJS |
4776 | |
4777 | /* Make sure the drop-in dir is registered in our path cache. This way we don't need to stupidly | |
4778 | * recreate the cache after every drop-in we write. */ | |
4779 | if (u->manager->unit_path_cache) { | |
be327321 | 4780 | r = set_put_strdup(&u->manager->unit_path_cache, p); |
4dba44a5 ZJS |
4781 | if (r < 0) |
4782 | return r; | |
4783 | } | |
4784 | ||
2a9a6f8a | 4785 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4786 | if (r < 0) |
4787 | return r; | |
4788 | ||
815b09d3 | 4789 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4790 | if (r < 0) |
4791 | return r; | |
815b09d3 | 4792 | q = NULL; |
adb76a70 | 4793 | |
adb76a70 WC |
4794 | strv_uniq(u->dropin_paths); |
4795 | ||
4796 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4797 | ||
4798 | return 0; | |
26d04f86 | 4799 | } |
71645aca | 4800 | |
2e59b241 | 4801 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4802 | _cleanup_free_ char *p = NULL; |
4803 | va_list ap; | |
4804 | int r; | |
4805 | ||
4806 | assert(u); | |
4807 | assert(name); | |
4808 | assert(format); | |
4809 | ||
2e59b241 | 4810 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4811 | return 0; |
4812 | ||
4813 | va_start(ap, format); | |
4814 | r = vasprintf(&p, format, ap); | |
4815 | va_end(ap); | |
4816 | ||
4817 | if (r < 0) | |
4818 | return -ENOMEM; | |
4819 | ||
2e59b241 | 4820 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4821 | } |
71645aca | 4822 | |
c2756a68 | 4823 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4824 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4825 | FILE *f; |
4f4afc88 | 4826 | |
c2756a68 LP |
4827 | assert(u); |
4828 | ||
3f5e8115 LP |
4829 | if (!UNIT_VTABLE(u)->can_transient) |
4830 | return -EOPNOTSUPP; | |
4831 | ||
45639f1b LP |
4832 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4833 | ||
657ee2d8 | 4834 | path = path_join(u->manager->lookup_paths.transient, u->id); |
4f4afc88 LP |
4835 | if (!path) |
4836 | return -ENOMEM; | |
4837 | ||
4838 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4839 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4840 | ||
78e334b5 | 4841 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 4842 | f = fopen(path, "we"); |
0126c8f3 | 4843 | if (!f) |
78e334b5 | 4844 | return -errno; |
4f4afc88 LP |
4845 | } |
4846 | ||
0126c8f3 | 4847 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4848 | u->transient_file = f; |
4849 | ||
0126c8f3 | 4850 | free_and_replace(u->fragment_path, path); |
7c65093a | 4851 | |
7c65093a LP |
4852 | u->source_path = mfree(u->source_path); |
4853 | u->dropin_paths = strv_free(u->dropin_paths); | |
4854 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4855 | ||
4f4afc88 LP |
4856 | u->load_state = UNIT_STUB; |
4857 | u->load_error = 0; | |
4858 | u->transient = true; | |
4859 | ||
7c65093a LP |
4860 | unit_add_to_dbus_queue(u); |
4861 | unit_add_to_gc_queue(u); | |
c2756a68 | 4862 | |
4f4afc88 LP |
4863 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4864 | u->transient_file); | |
4865 | ||
3f5e8115 | 4866 | return 0; |
c2756a68 LP |
4867 | } |
4868 | ||
c53d2d54 | 4869 | static int log_kill(pid_t pid, int sig, void *userdata) { |
1d98fef1 LP |
4870 | _cleanup_free_ char *comm = NULL; |
4871 | ||
4872 | (void) get_process_comm(pid, &comm); | |
4873 | ||
4874 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4875 | only, like for example systemd's own PAM stub process. */ | |
4876 | if (comm && comm[0] == '(') | |
c53d2d54 | 4877 | return 0; |
1d98fef1 LP |
4878 | |
4879 | log_unit_notice(userdata, | |
4880 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4881 | pid, | |
4882 | strna(comm), | |
4883 | signal_to_string(sig)); | |
c53d2d54 DB |
4884 | |
4885 | return 1; | |
1d98fef1 LP |
4886 | } |
4887 | ||
4ab1670f | 4888 | static int operation_to_signal(const KillContext *c, KillOperation k, bool *noteworthy) { |
1d98fef1 LP |
4889 | assert(c); |
4890 | ||
4891 | switch (k) { | |
4892 | ||
4893 | case KILL_TERMINATE: | |
4894 | case KILL_TERMINATE_AND_LOG: | |
4ab1670f | 4895 | *noteworthy = false; |
1d98fef1 LP |
4896 | return c->kill_signal; |
4897 | ||
a232ebcc | 4898 | case KILL_RESTART: |
4ab1670f | 4899 | *noteworthy = false; |
a232ebcc ZJS |
4900 | return restart_kill_signal(c); |
4901 | ||
1d98fef1 | 4902 | case KILL_KILL: |
4ab1670f | 4903 | *noteworthy = true; |
fbb48d4c | 4904 | return c->final_kill_signal; |
1d98fef1 | 4905 | |
c87700a1 | 4906 | case KILL_WATCHDOG: |
4ab1670f | 4907 | *noteworthy = true; |
c87700a1 | 4908 | return c->watchdog_signal; |
1d98fef1 LP |
4909 | |
4910 | default: | |
4911 | assert_not_reached("KillOperation unknown"); | |
4912 | } | |
4913 | } | |
4914 | ||
cd2086fe LP |
4915 | int unit_kill_context( |
4916 | Unit *u, | |
4917 | KillContext *c, | |
db2cb23b | 4918 | KillOperation k, |
cd2086fe LP |
4919 | pid_t main_pid, |
4920 | pid_t control_pid, | |
4921 | bool main_pid_alien) { | |
4922 | ||
1d98fef1 | 4923 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4924 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4925 | int sig, r; |
cd2086fe LP |
4926 | |
4927 | assert(u); | |
4928 | assert(c); | |
4929 | ||
59ec09a8 ZJS |
4930 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. |
4931 | * Returns > 0 if we killed something worth waiting for, 0 otherwise. */ | |
1d98fef1 | 4932 | |
cd2086fe LP |
4933 | if (c->kill_mode == KILL_NONE) |
4934 | return 0; | |
4935 | ||
4ab1670f ZJS |
4936 | bool noteworthy; |
4937 | sig = operation_to_signal(c, k, ¬eworthy); | |
4938 | if (noteworthy) | |
4939 | log_func = log_kill; | |
1d98fef1 LP |
4940 | |
4941 | send_sighup = | |
4942 | c->send_sighup && | |
4943 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4944 | sig != SIGHUP; | |
4945 | ||
cd2086fe | 4946 | if (main_pid > 0) { |
1d98fef1 LP |
4947 | if (log_func) |
4948 | log_func(main_pid, sig, u); | |
cd2086fe | 4949 | |
1d98fef1 | 4950 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4951 | if (r < 0 && r != -ESRCH) { |
4952 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4953 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 4954 | |
b821a397 | 4955 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 4956 | } else { |
bc6aed7b LP |
4957 | if (!main_pid_alien) |
4958 | wait_for_exit = true; | |
82659fd7 | 4959 | |
1d98fef1 | 4960 | if (r != -ESRCH && send_sighup) |
d0667321 | 4961 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 4962 | } |
cd2086fe LP |
4963 | } |
4964 | ||
4965 | if (control_pid > 0) { | |
1d98fef1 LP |
4966 | if (log_func) |
4967 | log_func(control_pid, sig, u); | |
cd2086fe | 4968 | |
1d98fef1 | 4969 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4970 | if (r < 0 && r != -ESRCH) { |
4971 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4972 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 4973 | |
b821a397 | 4974 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 4975 | } else { |
cd2086fe | 4976 | wait_for_exit = true; |
82659fd7 | 4977 | |
1d98fef1 | 4978 | if (r != -ESRCH && send_sighup) |
d0667321 | 4979 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 4980 | } |
cd2086fe LP |
4981 | } |
4982 | ||
b821a397 LP |
4983 | if (u->cgroup_path && |
4984 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4985 | _cleanup_set_free_ Set *pid_set = NULL; |
4986 | ||
82659fd7 LP |
4987 | /* Exclude the main/control pids from being killed via the cgroup */ |
4988 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4989 | if (!pid_set) |
4990 | return -ENOMEM; | |
4991 | ||
1d98fef1 LP |
4992 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4993 | sig, | |
4994 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4995 | pid_set, | |
4996 | log_func, u); | |
cd2086fe | 4997 | if (r < 0) { |
4c701096 | 4998 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
b821a397 LP |
4999 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
5000 | ||
82659fd7 | 5001 | } else if (r > 0) { |
bc6aed7b | 5002 | |
1d9cc876 LP |
5003 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
5004 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
5005 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
5006 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
5007 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
5008 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 5009 | |
c22800e4 | 5010 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 5011 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 5012 | wait_for_exit = true; |
58ea275a | 5013 | |
1d98fef1 | 5014 | if (send_sighup) { |
82659fd7 LP |
5015 | set_free(pid_set); |
5016 | ||
5017 | pid_set = unit_pid_set(main_pid, control_pid); | |
5018 | if (!pid_set) | |
5019 | return -ENOMEM; | |
5020 | ||
c8aa4b5b LP |
5021 | (void) cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
5022 | SIGHUP, | |
5023 | CGROUP_IGNORE_SELF, | |
5024 | pid_set, | |
5025 | NULL, NULL); | |
82659fd7 LP |
5026 | } |
5027 | } | |
cd2086fe LP |
5028 | } |
5029 | ||
5030 | return wait_for_exit; | |
5031 | } | |
5032 | ||
eef85c4a | 5033 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
ca8700e9 | 5034 | _cleanup_free_ char *p = NULL; |
eef85c4a | 5035 | UnitDependencyInfo di; |
a57f7e2c LP |
5036 | int r; |
5037 | ||
5038 | assert(u); | |
5039 | assert(path); | |
5040 | ||
eef85c4a LP |
5041 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in |
5042 | * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to | |
5043 | * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily | |
5044 | * determine which units to make themselves a dependency of. */ | |
a57f7e2c | 5045 | |
70b64bd3 ZJS |
5046 | if (!path_is_absolute(path)) |
5047 | return -EINVAL; | |
5048 | ||
548f6937 | 5049 | r = hashmap_ensure_allocated(&u->requires_mounts_for, &path_hash_ops); |
eef85c4a LP |
5050 | if (r < 0) |
5051 | return r; | |
5052 | ||
a57f7e2c LP |
5053 | p = strdup(path); |
5054 | if (!p) | |
5055 | return -ENOMEM; | |
5056 | ||
106bf8e4 | 5057 | path = path_simplify(p, true); |
a57f7e2c | 5058 | |
ca8700e9 | 5059 | if (!path_is_normalized(path)) |
a57f7e2c | 5060 | return -EPERM; |
a57f7e2c | 5061 | |
ca8700e9 | 5062 | if (hashmap_contains(u->requires_mounts_for, path)) |
a57f7e2c | 5063 | return 0; |
a57f7e2c | 5064 | |
eef85c4a LP |
5065 | di = (UnitDependencyInfo) { |
5066 | .origin_mask = mask | |
5067 | }; | |
5068 | ||
ca8700e9 ZJS |
5069 | r = hashmap_put(u->requires_mounts_for, path, di.data); |
5070 | if (r < 0) | |
a57f7e2c | 5071 | return r; |
ca8700e9 | 5072 | p = NULL; |
a57f7e2c | 5073 | |
4cb06c59 | 5074 | char prefix[strlen(path) + 1]; |
ca8700e9 | 5075 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
a57f7e2c LP |
5076 | Set *x; |
5077 | ||
5078 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
5079 | if (!x) { | |
ca8700e9 | 5080 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 5081 | |
548f6937 | 5082 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
742f41ad LP |
5083 | if (r < 0) |
5084 | return r; | |
a57f7e2c LP |
5085 | |
5086 | q = strdup(prefix); | |
5087 | if (!q) | |
5088 | return -ENOMEM; | |
5089 | ||
d5099efc | 5090 | x = set_new(NULL); |
ca8700e9 | 5091 | if (!x) |
a57f7e2c | 5092 | return -ENOMEM; |
a57f7e2c LP |
5093 | |
5094 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
5095 | if (r < 0) { | |
a57f7e2c LP |
5096 | set_free(x); |
5097 | return r; | |
5098 | } | |
ca8700e9 | 5099 | q = NULL; |
a57f7e2c LP |
5100 | } |
5101 | ||
5102 | r = set_put(x, u); | |
5103 | if (r < 0) | |
5104 | return r; | |
5105 | } | |
5106 | ||
5107 | return 0; | |
5108 | } | |
5109 | ||
613b411c LP |
5110 | int unit_setup_exec_runtime(Unit *u) { |
5111 | ExecRuntime **rt; | |
5112 | size_t offset; | |
613b411c | 5113 | Unit *other; |
eef85c4a LP |
5114 | Iterator i; |
5115 | void *v; | |
e8a565cb | 5116 | int r; |
613b411c LP |
5117 | |
5118 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
5119 | assert(offset > 0); | |
5120 | ||
06b643e7 | 5121 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
5122 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
5123 | if (*rt) | |
5124 | return 0; | |
5125 | ||
5126 | /* Try to get it from somebody else */ | |
eef85c4a | 5127 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { |
e8a565cb YW |
5128 | r = exec_runtime_acquire(u->manager, NULL, other->id, false, rt); |
5129 | if (r == 1) | |
5130 | return 1; | |
613b411c LP |
5131 | } |
5132 | ||
e8a565cb | 5133 | return exec_runtime_acquire(u->manager, unit_get_exec_context(u), u->id, true, rt); |
613b411c LP |
5134 | } |
5135 | ||
29206d46 LP |
5136 | int unit_setup_dynamic_creds(Unit *u) { |
5137 | ExecContext *ec; | |
5138 | DynamicCreds *dcreds; | |
5139 | size_t offset; | |
5140 | ||
5141 | assert(u); | |
5142 | ||
5143 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
5144 | assert(offset > 0); | |
5145 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
5146 | ||
5147 | ec = unit_get_exec_context(u); | |
5148 | assert(ec); | |
5149 | ||
5150 | if (!ec->dynamic_user) | |
5151 | return 0; | |
5152 | ||
5153 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
5154 | } | |
5155 | ||
1c2e9646 LP |
5156 | bool unit_type_supported(UnitType t) { |
5157 | if (_unlikely_(t < 0)) | |
5158 | return false; | |
5159 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
5160 | return false; | |
5161 | ||
5162 | if (!unit_vtable[t]->supported) | |
5163 | return true; | |
5164 | ||
5165 | return unit_vtable[t]->supported(); | |
5166 | } | |
5167 | ||
8b4305c7 LP |
5168 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
5169 | int r; | |
5170 | ||
5171 | assert(u); | |
5172 | assert(where); | |
5173 | ||
5174 | r = dir_is_empty(where); | |
3f602115 | 5175 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
5176 | return; |
5177 | if (r < 0) { | |
5178 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
5179 | return; | |
5180 | } | |
5181 | ||
5182 | log_struct(LOG_NOTICE, | |
2b044526 | 5183 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 5184 | LOG_UNIT_ID(u), |
f1c50bec | 5185 | LOG_UNIT_INVOCATION_ID(u), |
8b4305c7 | 5186 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), |
a1230ff9 | 5187 | "WHERE=%s", where); |
8b4305c7 LP |
5188 | } |
5189 | ||
25cd4964 | 5190 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
58d9d89b | 5191 | _cleanup_free_ char *canonical_where = NULL; |
8b4305c7 LP |
5192 | int r; |
5193 | ||
5194 | assert(u); | |
5195 | assert(where); | |
5196 | ||
a5648b80 | 5197 | r = chase_symlinks(where, NULL, CHASE_NONEXISTENT, &canonical_where, NULL); |
8b4305c7 | 5198 | if (r < 0) { |
25cd4964 | 5199 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
5200 | return 0; |
5201 | } | |
25cd4964 AJ |
5202 | |
5203 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
5204 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
5205 | return 0; |
5206 | ||
25cd4964 | 5207 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
8b4305c7 | 5208 | log_struct(LOG_ERR, |
2b044526 | 5209 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 5210 | LOG_UNIT_ID(u), |
f1c50bec | 5211 | LOG_UNIT_INVOCATION_ID(u), |
25cd4964 | 5212 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), |
a1230ff9 | 5213 | "WHERE=%s", where); |
8b4305c7 LP |
5214 | |
5215 | return -ELOOP; | |
5216 | } | |
0f13f3bd LP |
5217 | |
5218 | bool unit_is_pristine(Unit *u) { | |
5219 | assert(u); | |
5220 | ||
7c65093a | 5221 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
5222 | * in a number of different ways. Note that to cater for unit |
5223 | * types such as slice, we are generally fine with units that | |
e9e8cbc8 ZJS |
5224 | * are marked UNIT_LOADED even though nothing was actually |
5225 | * loaded, as those unit types don't require a file on disk. */ | |
0f13f3bd LP |
5226 | |
5227 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
5228 | u->fragment_path || | |
5229 | u->source_path || | |
5230 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
5231 | u->job || |
5232 | u->merged_into); | |
5233 | } | |
291d565a LP |
5234 | |
5235 | pid_t unit_control_pid(Unit *u) { | |
5236 | assert(u); | |
5237 | ||
5238 | if (UNIT_VTABLE(u)->control_pid) | |
5239 | return UNIT_VTABLE(u)->control_pid(u); | |
5240 | ||
5241 | return 0; | |
5242 | } | |
5243 | ||
5244 | pid_t unit_main_pid(Unit *u) { | |
5245 | assert(u); | |
5246 | ||
5247 | if (UNIT_VTABLE(u)->main_pid) | |
5248 | return UNIT_VTABLE(u)->main_pid(u); | |
5249 | ||
5250 | return 0; | |
5251 | } | |
00d9ef85 LP |
5252 | |
5253 | static void unit_unref_uid_internal( | |
5254 | Unit *u, | |
5255 | uid_t *ref_uid, | |
5256 | bool destroy_now, | |
5257 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
5258 | ||
5259 | assert(u); | |
5260 | assert(ref_uid); | |
5261 | assert(_manager_unref_uid); | |
5262 | ||
5263 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
5264 | * gid_t are actually the same time, with the same validity rules. | |
5265 | * | |
5266 | * Drops a reference to UID/GID from a unit. */ | |
5267 | ||
5268 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
5269 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
5270 | ||
5271 | if (!uid_is_valid(*ref_uid)) | |
5272 | return; | |
5273 | ||
5274 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
5275 | *ref_uid = UID_INVALID; | |
5276 | } | |
5277 | ||
b90cf102 | 5278 | static void unit_unref_uid(Unit *u, bool destroy_now) { |
00d9ef85 LP |
5279 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); |
5280 | } | |
5281 | ||
b90cf102 | 5282 | static void unit_unref_gid(Unit *u, bool destroy_now) { |
00d9ef85 LP |
5283 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); |
5284 | } | |
5285 | ||
b90cf102 LP |
5286 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { |
5287 | assert(u); | |
5288 | ||
5289 | unit_unref_uid(u, destroy_now); | |
5290 | unit_unref_gid(u, destroy_now); | |
5291 | } | |
5292 | ||
00d9ef85 LP |
5293 | static int unit_ref_uid_internal( |
5294 | Unit *u, | |
5295 | uid_t *ref_uid, | |
5296 | uid_t uid, | |
5297 | bool clean_ipc, | |
5298 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
5299 | ||
5300 | int r; | |
5301 | ||
5302 | assert(u); | |
5303 | assert(ref_uid); | |
5304 | assert(uid_is_valid(uid)); | |
5305 | assert(_manager_ref_uid); | |
5306 | ||
5307 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
5308 | * are actually the same type, and have the same validity rules. | |
5309 | * | |
5310 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
5311 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
5312 | * drops to zero. */ | |
5313 | ||
5314 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
5315 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
5316 | ||
5317 | if (*ref_uid == uid) | |
5318 | return 0; | |
5319 | ||
5320 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
5321 | return -EBUSY; | |
5322 | ||
5323 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
5324 | if (r < 0) | |
5325 | return r; | |
5326 | ||
5327 | *ref_uid = uid; | |
5328 | return 1; | |
5329 | } | |
5330 | ||
b90cf102 | 5331 | static int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { |
00d9ef85 LP |
5332 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); |
5333 | } | |
5334 | ||
b90cf102 | 5335 | static int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { |
00d9ef85 LP |
5336 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); |
5337 | } | |
5338 | ||
5339 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
5340 | int r = 0, q = 0; | |
5341 | ||
5342 | assert(u); | |
5343 | ||
5344 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
5345 | ||
5346 | if (uid_is_valid(uid)) { | |
5347 | r = unit_ref_uid(u, uid, clean_ipc); | |
5348 | if (r < 0) | |
5349 | return r; | |
5350 | } | |
5351 | ||
5352 | if (gid_is_valid(gid)) { | |
5353 | q = unit_ref_gid(u, gid, clean_ipc); | |
5354 | if (q < 0) { | |
5355 | if (r > 0) | |
5356 | unit_unref_uid(u, false); | |
5357 | ||
5358 | return q; | |
5359 | } | |
5360 | } | |
5361 | ||
5362 | return r > 0 || q > 0; | |
5363 | } | |
5364 | ||
5365 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
5366 | ExecContext *c; | |
5367 | int r; | |
5368 | ||
5369 | assert(u); | |
5370 | ||
5371 | c = unit_get_exec_context(u); | |
5372 | ||
5373 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
5374 | if (r < 0) | |
5375 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
5376 | ||
5377 | return r; | |
5378 | } | |
5379 | ||
00d9ef85 LP |
5380 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { |
5381 | int r; | |
5382 | ||
5383 | assert(u); | |
5384 | ||
5385 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
5386 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
5387 | * objects when no service references the UID/GID anymore. */ | |
5388 | ||
5389 | r = unit_ref_uid_gid(u, uid, gid); | |
5390 | if (r > 0) | |
37d0b962 | 5391 | unit_add_to_dbus_queue(u); |
00d9ef85 | 5392 | } |
4b58153d | 5393 | |
4b58153d LP |
5394 | int unit_acquire_invocation_id(Unit *u) { |
5395 | sd_id128_t id; | |
5396 | int r; | |
5397 | ||
5398 | assert(u); | |
5399 | ||
5400 | r = sd_id128_randomize(&id); | |
5401 | if (r < 0) | |
5402 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
5403 | ||
5404 | r = unit_set_invocation_id(u, id); | |
5405 | if (r < 0) | |
5406 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
5407 | ||
af92c603 | 5408 | unit_add_to_dbus_queue(u); |
4b58153d LP |
5409 | return 0; |
5410 | } | |
f0d47797 | 5411 | |
1ad6e8b3 LP |
5412 | int unit_set_exec_params(Unit *u, ExecParameters *p) { |
5413 | int r; | |
5414 | ||
7960b0c7 LP |
5415 | assert(u); |
5416 | assert(p); | |
f0d47797 | 5417 | |
004c7f16 | 5418 | /* Copy parameters from manager */ |
1ad6e8b3 LP |
5419 | r = manager_get_effective_environment(u->manager, &p->environment); |
5420 | if (r < 0) | |
5421 | return r; | |
5422 | ||
004c7f16 LP |
5423 | p->confirm_spawn = manager_get_confirm_spawn(u->manager); |
5424 | p->cgroup_supported = u->manager->cgroup_supported; | |
5425 | p->prefix = u->manager->prefix; | |
5426 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
5427 | ||
5238e957 | 5428 | /* Copy parameters from unit */ |
7960b0c7 | 5429 | p->cgroup_path = u->cgroup_path; |
1d9cc876 | 5430 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
1ad6e8b3 | 5431 | |
bb0c0d6f LP |
5432 | p->received_credentials = u->manager->received_credentials; |
5433 | ||
1ad6e8b3 | 5434 | return 0; |
f0d47797 | 5435 | } |
a79279c7 | 5436 | |
4c253ed1 | 5437 | int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) { |
a79279c7 LP |
5438 | int r; |
5439 | ||
5440 | assert(u); | |
5441 | assert(ret); | |
5442 | ||
5443 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
5444 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
5445 | ||
5446 | (void) unit_realize_cgroup(u); | |
5447 | ||
4c253ed1 LP |
5448 | r = safe_fork(name, FORK_REOPEN_LOG, ret); |
5449 | if (r != 0) | |
5450 | return r; | |
a79279c7 | 5451 | |
4c253ed1 LP |
5452 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); |
5453 | (void) ignore_signals(SIGPIPE, -1); | |
a79279c7 | 5454 | |
4c253ed1 | 5455 | (void) prctl(PR_SET_PDEATHSIG, SIGTERM); |
a79279c7 | 5456 | |
4c253ed1 LP |
5457 | if (u->cgroup_path) { |
5458 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
5459 | if (r < 0) { | |
5460 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", u->cgroup_path); | |
5461 | _exit(EXIT_CGROUP); | |
a79279c7 | 5462 | } |
a79279c7 LP |
5463 | } |
5464 | ||
4c253ed1 | 5465 | return 0; |
a79279c7 | 5466 | } |
c999cf38 | 5467 | |
810ef318 YW |
5468 | int unit_fork_and_watch_rm_rf(Unit *u, char **paths, pid_t *ret_pid) { |
5469 | pid_t pid; | |
5470 | int r; | |
5471 | ||
5472 | assert(u); | |
5473 | assert(ret_pid); | |
5474 | ||
5475 | r = unit_fork_helper_process(u, "(sd-rmrf)", &pid); | |
5476 | if (r < 0) | |
5477 | return r; | |
5478 | if (r == 0) { | |
5479 | int ret = EXIT_SUCCESS; | |
5480 | char **i; | |
5481 | ||
5482 | STRV_FOREACH(i, paths) { | |
5483 | r = rm_rf(*i, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_MISSING_OK); | |
5484 | if (r < 0) { | |
5485 | log_error_errno(r, "Failed to remove '%s': %m", *i); | |
5486 | ret = EXIT_FAILURE; | |
5487 | } | |
5488 | } | |
5489 | ||
5490 | _exit(ret); | |
5491 | } | |
5492 | ||
5493 | r = unit_watch_pid(u, pid, true); | |
5494 | if (r < 0) | |
5495 | return r; | |
5496 | ||
5497 | *ret_pid = pid; | |
5498 | return 0; | |
5499 | } | |
5500 | ||
c999cf38 LP |
5501 | static void unit_update_dependency_mask(Unit *u, UnitDependency d, Unit *other, UnitDependencyInfo di) { |
5502 | assert(u); | |
5503 | assert(d >= 0); | |
5504 | assert(d < _UNIT_DEPENDENCY_MAX); | |
5505 | assert(other); | |
5506 | ||
5507 | if (di.origin_mask == 0 && di.destination_mask == 0) { | |
5508 | /* No bit set anymore, let's drop the whole entry */ | |
5509 | assert_se(hashmap_remove(u->dependencies[d], other)); | |
29a743f9 | 5510 | log_unit_debug(u, "lost dependency %s=%s", unit_dependency_to_string(d), other->id); |
c999cf38 LP |
5511 | } else |
5512 | /* Mask was reduced, let's update the entry */ | |
5513 | assert_se(hashmap_update(u->dependencies[d], other, di.data) == 0); | |
5514 | } | |
5515 | ||
5516 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
c999cf38 LP |
5517 | assert(u); |
5518 | ||
5519 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5520 | ||
5521 | if (mask == 0) | |
5522 | return; | |
5523 | ||
f6173cb9 | 5524 | for (UnitDependency d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
c999cf38 LP |
5525 | bool done; |
5526 | ||
5527 | do { | |
5528 | UnitDependencyInfo di; | |
5529 | Unit *other; | |
5530 | Iterator i; | |
5531 | ||
5532 | done = true; | |
5533 | ||
5534 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { | |
c999cf38 LP |
5535 | if ((di.origin_mask & ~mask) == di.origin_mask) |
5536 | continue; | |
5537 | di.origin_mask &= ~mask; | |
5538 | unit_update_dependency_mask(u, d, other, di); | |
5539 | ||
5540 | /* We updated the dependency from our unit to the other unit now. But most dependencies | |
5541 | * imply a reverse dependency. Hence, let's delete that one too. For that we go through | |
5542 | * all dependency types on the other unit and delete all those which point to us and | |
5543 | * have the right mask set. */ | |
5544 | ||
f6173cb9 | 5545 | for (UnitDependency q = 0; q < _UNIT_DEPENDENCY_MAX; q++) { |
c999cf38 LP |
5546 | UnitDependencyInfo dj; |
5547 | ||
5548 | dj.data = hashmap_get(other->dependencies[q], u); | |
5549 | if ((dj.destination_mask & ~mask) == dj.destination_mask) | |
5550 | continue; | |
5551 | dj.destination_mask &= ~mask; | |
5552 | ||
5553 | unit_update_dependency_mask(other, q, u, dj); | |
5554 | } | |
5555 | ||
5556 | unit_add_to_gc_queue(other); | |
5557 | ||
5558 | done = false; | |
5559 | break; | |
5560 | } | |
5561 | ||
5562 | } while (!done); | |
5563 | } | |
5564 | } | |
d3070fbd | 5565 | |
2f8c48b6 AZ |
5566 | static int unit_get_invocation_path(Unit *u, char **ret) { |
5567 | char *p; | |
5568 | int r; | |
5569 | ||
5570 | assert(u); | |
5571 | assert(ret); | |
5572 | ||
5573 | if (MANAGER_IS_SYSTEM(u->manager)) | |
5574 | p = strjoin("/run/systemd/units/invocation:", u->id); | |
5575 | else { | |
5576 | _cleanup_free_ char *user_path = NULL; | |
5577 | r = xdg_user_runtime_dir(&user_path, "/systemd/units/invocation:"); | |
5578 | if (r < 0) | |
5579 | return r; | |
5580 | p = strjoin(user_path, u->id); | |
5581 | } | |
5582 | ||
5583 | if (!p) | |
5584 | return -ENOMEM; | |
5585 | ||
5586 | *ret = p; | |
5587 | return 0; | |
5588 | } | |
5589 | ||
d3070fbd | 5590 | static int unit_export_invocation_id(Unit *u) { |
2f8c48b6 | 5591 | _cleanup_free_ char *p = NULL; |
d3070fbd LP |
5592 | int r; |
5593 | ||
5594 | assert(u); | |
5595 | ||
5596 | if (u->exported_invocation_id) | |
5597 | return 0; | |
5598 | ||
5599 | if (sd_id128_is_null(u->invocation_id)) | |
5600 | return 0; | |
5601 | ||
2f8c48b6 AZ |
5602 | r = unit_get_invocation_path(u, &p); |
5603 | if (r < 0) | |
5604 | return log_unit_debug_errno(u, r, "Failed to get invocation path: %m"); | |
5605 | ||
d3070fbd LP |
5606 | r = symlink_atomic(u->invocation_id_string, p); |
5607 | if (r < 0) | |
5608 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5609 | ||
5610 | u->exported_invocation_id = true; | |
5611 | return 0; | |
5612 | } | |
5613 | ||
5614 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5615 | const char *p; | |
5616 | char buf[2]; | |
5617 | int r; | |
5618 | ||
5619 | assert(u); | |
5620 | assert(c); | |
5621 | ||
5622 | if (u->exported_log_level_max) | |
5623 | return 0; | |
5624 | ||
5625 | if (c->log_level_max < 0) | |
5626 | return 0; | |
5627 | ||
5628 | assert(c->log_level_max <= 7); | |
5629 | ||
5630 | buf[0] = '0' + c->log_level_max; | |
5631 | buf[1] = 0; | |
5632 | ||
5633 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5634 | r = symlink_atomic(buf, p); | |
5635 | if (r < 0) | |
5636 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5637 | ||
5638 | u->exported_log_level_max = true; | |
5639 | return 0; | |
5640 | } | |
5641 | ||
5642 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5643 | _cleanup_close_ int fd = -1; | |
5644 | struct iovec *iovec; | |
5645 | const char *p; | |
5646 | char *pattern; | |
5647 | le64_t *sizes; | |
5648 | ssize_t n; | |
5649 | size_t i; | |
5650 | int r; | |
5651 | ||
5652 | if (u->exported_log_extra_fields) | |
5653 | return 0; | |
5654 | ||
5655 | if (c->n_log_extra_fields <= 0) | |
5656 | return 0; | |
5657 | ||
5658 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5659 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5660 | ||
5661 | for (i = 0; i < c->n_log_extra_fields; i++) { | |
5662 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); | |
5663 | ||
5664 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5665 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5666 | } | |
5667 | ||
5668 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5669 | pattern = strjoina(p, ".XXXXXX"); | |
5670 | ||
5671 | fd = mkostemp_safe(pattern); | |
5672 | if (fd < 0) | |
5673 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5674 | ||
5675 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5676 | if (n < 0) { | |
5677 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5678 | goto fail; | |
5679 | } | |
5680 | ||
5681 | (void) fchmod(fd, 0644); | |
5682 | ||
5683 | if (rename(pattern, p) < 0) { | |
5684 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5685 | goto fail; | |
5686 | } | |
5687 | ||
5688 | u->exported_log_extra_fields = true; | |
5689 | return 0; | |
5690 | ||
5691 | fail: | |
5692 | (void) unlink(pattern); | |
5693 | return r; | |
5694 | } | |
5695 | ||
5ac1530e | 5696 | static int unit_export_log_ratelimit_interval(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5697 | _cleanup_free_ char *buf = NULL; |
5698 | const char *p; | |
5699 | int r; | |
5700 | ||
5701 | assert(u); | |
5702 | assert(c); | |
5703 | ||
5ac1530e | 5704 | if (u->exported_log_ratelimit_interval) |
90fc172e AZ |
5705 | return 0; |
5706 | ||
5ac1530e | 5707 | if (c->log_ratelimit_interval_usec == 0) |
90fc172e AZ |
5708 | return 0; |
5709 | ||
5710 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5711 | ||
5ac1530e | 5712 | if (asprintf(&buf, "%" PRIu64, c->log_ratelimit_interval_usec) < 0) |
90fc172e AZ |
5713 | return log_oom(); |
5714 | ||
5715 | r = symlink_atomic(buf, p); | |
5716 | if (r < 0) | |
5717 | return log_unit_debug_errno(u, r, "Failed to create log rate limit interval symlink %s: %m", p); | |
5718 | ||
5ac1530e | 5719 | u->exported_log_ratelimit_interval = true; |
90fc172e AZ |
5720 | return 0; |
5721 | } | |
5722 | ||
5ac1530e | 5723 | static int unit_export_log_ratelimit_burst(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5724 | _cleanup_free_ char *buf = NULL; |
5725 | const char *p; | |
5726 | int r; | |
5727 | ||
5728 | assert(u); | |
5729 | assert(c); | |
5730 | ||
5ac1530e | 5731 | if (u->exported_log_ratelimit_burst) |
90fc172e AZ |
5732 | return 0; |
5733 | ||
5ac1530e | 5734 | if (c->log_ratelimit_burst == 0) |
90fc172e AZ |
5735 | return 0; |
5736 | ||
5737 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5738 | ||
5ac1530e | 5739 | if (asprintf(&buf, "%u", c->log_ratelimit_burst) < 0) |
90fc172e AZ |
5740 | return log_oom(); |
5741 | ||
5742 | r = symlink_atomic(buf, p); | |
5743 | if (r < 0) | |
5744 | return log_unit_debug_errno(u, r, "Failed to create log rate limit burst symlink %s: %m", p); | |
5745 | ||
5ac1530e | 5746 | u->exported_log_ratelimit_burst = true; |
90fc172e AZ |
5747 | return 0; |
5748 | } | |
5749 | ||
d3070fbd LP |
5750 | void unit_export_state_files(Unit *u) { |
5751 | const ExecContext *c; | |
5752 | ||
5753 | assert(u); | |
5754 | ||
5755 | if (!u->id) | |
5756 | return; | |
5757 | ||
638cece4 | 5758 | if (MANAGER_IS_TEST_RUN(u->manager)) |
8f632531 LP |
5759 | return; |
5760 | ||
d3070fbd LP |
5761 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5762 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5763 | * the IPC system itself and PID 1 also log to the journal. | |
5764 | * | |
5765 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5766 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5767 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5768 | * namespace at least. | |
5769 | * | |
5770 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5771 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5772 | * them with one. */ | |
5773 | ||
5774 | (void) unit_export_invocation_id(u); | |
5775 | ||
2f8c48b6 AZ |
5776 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5777 | return; | |
5778 | ||
d3070fbd LP |
5779 | c = unit_get_exec_context(u); |
5780 | if (c) { | |
5781 | (void) unit_export_log_level_max(u, c); | |
5782 | (void) unit_export_log_extra_fields(u, c); | |
5ac1530e ZJS |
5783 | (void) unit_export_log_ratelimit_interval(u, c); |
5784 | (void) unit_export_log_ratelimit_burst(u, c); | |
d3070fbd LP |
5785 | } |
5786 | } | |
5787 | ||
5788 | void unit_unlink_state_files(Unit *u) { | |
5789 | const char *p; | |
5790 | ||
5791 | assert(u); | |
5792 | ||
5793 | if (!u->id) | |
5794 | return; | |
5795 | ||
d3070fbd LP |
5796 | /* Undoes the effect of unit_export_state() */ |
5797 | ||
5798 | if (u->exported_invocation_id) { | |
2f8c48b6 AZ |
5799 | _cleanup_free_ char *invocation_path = NULL; |
5800 | int r = unit_get_invocation_path(u, &invocation_path); | |
5801 | if (r >= 0) { | |
5802 | (void) unlink(invocation_path); | |
5803 | u->exported_invocation_id = false; | |
5804 | } | |
d3070fbd LP |
5805 | } |
5806 | ||
2f8c48b6 AZ |
5807 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5808 | return; | |
5809 | ||
d3070fbd LP |
5810 | if (u->exported_log_level_max) { |
5811 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5812 | (void) unlink(p); | |
5813 | ||
5814 | u->exported_log_level_max = false; | |
5815 | } | |
5816 | ||
5817 | if (u->exported_log_extra_fields) { | |
5818 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5819 | (void) unlink(p); | |
5820 | ||
5821 | u->exported_log_extra_fields = false; | |
5822 | } | |
90fc172e | 5823 | |
5ac1530e | 5824 | if (u->exported_log_ratelimit_interval) { |
90fc172e AZ |
5825 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); |
5826 | (void) unlink(p); | |
5827 | ||
5ac1530e | 5828 | u->exported_log_ratelimit_interval = false; |
90fc172e AZ |
5829 | } |
5830 | ||
5ac1530e | 5831 | if (u->exported_log_ratelimit_burst) { |
90fc172e AZ |
5832 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); |
5833 | (void) unlink(p); | |
5834 | ||
5ac1530e | 5835 | u->exported_log_ratelimit_burst = false; |
90fc172e | 5836 | } |
d3070fbd | 5837 | } |
5afe510c | 5838 | |
3c7416b6 LP |
5839 | int unit_prepare_exec(Unit *u) { |
5840 | int r; | |
5841 | ||
5842 | assert(u); | |
5843 | ||
fab34748 KL |
5844 | /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable. |
5845 | * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */ | |
5846 | r = bpf_firewall_load_custom(u); | |
5847 | if (r < 0) | |
5848 | return r; | |
5849 | ||
3c7416b6 LP |
5850 | /* Prepares everything so that we can fork of a process for this unit */ |
5851 | ||
5852 | (void) unit_realize_cgroup(u); | |
5853 | ||
5854 | if (u->reset_accounting) { | |
9b2559a1 | 5855 | (void) unit_reset_accounting(u); |
3c7416b6 LP |
5856 | u->reset_accounting = false; |
5857 | } | |
5858 | ||
5859 | unit_export_state_files(u); | |
5860 | ||
5861 | r = unit_setup_exec_runtime(u); | |
5862 | if (r < 0) | |
5863 | return r; | |
5864 | ||
5865 | r = unit_setup_dynamic_creds(u); | |
5866 | if (r < 0) | |
5867 | return r; | |
5868 | ||
5869 | return 0; | |
5870 | } | |
5871 | ||
4c425434 LP |
5872 | static bool ignore_leftover_process(const char *comm) { |
5873 | return comm && comm[0] == '('; /* Most likely our own helper process (PAM?), ignore */ | |
5874 | } | |
5875 | ||
5876 | int unit_log_leftover_process_start(pid_t pid, int sig, void *userdata) { | |
a4634b21 LP |
5877 | _cleanup_free_ char *comm = NULL; |
5878 | ||
5879 | (void) get_process_comm(pid, &comm); | |
5880 | ||
4c425434 | 5881 | if (ignore_leftover_process(comm)) |
c53d2d54 | 5882 | return 0; |
a4634b21 | 5883 | |
4c425434 LP |
5884 | /* During start we print a warning */ |
5885 | ||
a4634b21 LP |
5886 | log_unit_warning(userdata, |
5887 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5888 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5889 | pid, strna(comm)); | |
c53d2d54 DB |
5890 | |
5891 | return 1; | |
a4634b21 LP |
5892 | } |
5893 | ||
4c425434 LP |
5894 | int unit_log_leftover_process_stop(pid_t pid, int sig, void *userdata) { |
5895 | _cleanup_free_ char *comm = NULL; | |
5896 | ||
5897 | (void) get_process_comm(pid, &comm); | |
5898 | ||
5899 | if (ignore_leftover_process(comm)) | |
5900 | return 0; | |
5901 | ||
5902 | /* During stop we only print an informational message */ | |
5903 | ||
5904 | log_unit_info(userdata, | |
5905 | "Unit process " PID_FMT " (%s) remains running after unit stopped.", | |
5906 | pid, strna(comm)); | |
5907 | ||
5908 | return 1; | |
5909 | } | |
5910 | ||
5911 | int unit_warn_leftover_processes(Unit *u, cg_kill_log_func_t log_func) { | |
a4634b21 LP |
5912 | assert(u); |
5913 | ||
5914 | (void) unit_pick_cgroup_path(u); | |
5915 | ||
5916 | if (!u->cgroup_path) | |
c53d2d54 | 5917 | return 0; |
a4634b21 | 5918 | |
4c425434 | 5919 | return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_func, u); |
a4634b21 LP |
5920 | } |
5921 | ||
bb2c7685 LP |
5922 | bool unit_needs_console(Unit *u) { |
5923 | ExecContext *ec; | |
5924 | UnitActiveState state; | |
5925 | ||
5926 | assert(u); | |
5927 | ||
5928 | state = unit_active_state(u); | |
5929 | ||
5930 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5931 | return false; | |
5932 | ||
5933 | if (UNIT_VTABLE(u)->needs_console) | |
5934 | return UNIT_VTABLE(u)->needs_console(u); | |
5935 | ||
5936 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5937 | ec = unit_get_exec_context(u); | |
5938 | if (!ec) | |
5939 | return false; | |
5940 | ||
5941 | return exec_context_may_touch_console(ec); | |
5942 | } | |
5943 | ||
f156e60c | 5944 | const char *unit_label_path(const Unit *u) { |
81e9871e LP |
5945 | const char *p; |
5946 | ||
f156e60c CG |
5947 | assert(u); |
5948 | ||
81e9871e LP |
5949 | /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off |
5950 | * when validating access checks. */ | |
5951 | ||
5952 | p = u->source_path ?: u->fragment_path; | |
5953 | if (!p) | |
5954 | return NULL; | |
5955 | ||
5956 | /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */ | |
640f3b14 | 5957 | if (null_or_empty_path(p) > 0) |
81e9871e LP |
5958 | return NULL; |
5959 | ||
5960 | return p; | |
5961 | } | |
5962 | ||
6592b975 LP |
5963 | int unit_pid_attachable(Unit *u, pid_t pid, sd_bus_error *error) { |
5964 | int r; | |
5965 | ||
5966 | assert(u); | |
5967 | ||
5968 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5969 | * and not a kernel thread either */ | |
5970 | ||
5971 | /* First, a simple range check */ | |
5972 | if (!pid_is_valid(pid)) | |
5973 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier " PID_FMT " is not valid.", pid); | |
5974 | ||
5975 | /* Some extra safety check */ | |
5976 | if (pid == 1 || pid == getpid_cached()) | |
3fe91079 | 5977 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager process, refusing.", pid); |
6592b975 LP |
5978 | |
5979 | /* Don't even begin to bother with kernel threads */ | |
5980 | r = is_kernel_thread(pid); | |
5981 | if (r == -ESRCH) | |
5982 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid); | |
5983 | if (r < 0) | |
5984 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid); | |
5985 | if (r > 0) | |
5986 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid); | |
5987 | ||
5988 | return 0; | |
5989 | } | |
5990 | ||
523ee2d4 LP |
5991 | void unit_log_success(Unit *u) { |
5992 | assert(u); | |
5993 | ||
5994 | log_struct(LOG_INFO, | |
5995 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR, | |
5996 | LOG_UNIT_ID(u), | |
5997 | LOG_UNIT_INVOCATION_ID(u), | |
5998 | LOG_UNIT_MESSAGE(u, "Succeeded.")); | |
5999 | } | |
6000 | ||
7c047d74 LP |
6001 | void unit_log_failure(Unit *u, const char *result) { |
6002 | assert(u); | |
6003 | assert(result); | |
6004 | ||
6005 | log_struct(LOG_WARNING, | |
6006 | "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR, | |
6007 | LOG_UNIT_ID(u), | |
6008 | LOG_UNIT_INVOCATION_ID(u), | |
6009 | LOG_UNIT_MESSAGE(u, "Failed with result '%s'.", result), | |
6010 | "UNIT_RESULT=%s", result); | |
6011 | } | |
6012 | ||
31cd5f63 AZ |
6013 | void unit_log_skip(Unit *u, const char *result) { |
6014 | assert(u); | |
6015 | assert(result); | |
6016 | ||
6017 | log_struct(LOG_INFO, | |
6018 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR, | |
6019 | LOG_UNIT_ID(u), | |
6020 | LOG_UNIT_INVOCATION_ID(u), | |
6021 | LOG_UNIT_MESSAGE(u, "Skipped due to '%s'.", result), | |
6022 | "UNIT_RESULT=%s", result); | |
6023 | } | |
6024 | ||
91bbd9b7 LP |
6025 | void unit_log_process_exit( |
6026 | Unit *u, | |
91bbd9b7 LP |
6027 | const char *kind, |
6028 | const char *command, | |
5cc2cd1c | 6029 | bool success, |
91bbd9b7 LP |
6030 | int code, |
6031 | int status) { | |
6032 | ||
5cc2cd1c ZJS |
6033 | int level; |
6034 | ||
91bbd9b7 LP |
6035 | assert(u); |
6036 | assert(kind); | |
6037 | ||
5cc2cd1c ZJS |
6038 | /* If this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure |
6039 | * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption | |
6040 | * that the service already logged the reason at a higher log level on its own. Otherwise, make it a | |
6041 | * WARNING. */ | |
6042 | if (success) | |
6043 | level = LOG_DEBUG; | |
6044 | else if (code == CLD_EXITED) | |
6045 | level = LOG_NOTICE; | |
6046 | else | |
91bbd9b7 LP |
6047 | level = LOG_WARNING; |
6048 | ||
6049 | log_struct(level, | |
6050 | "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR, | |
6051 | LOG_UNIT_MESSAGE(u, "%s exited, code=%s, status=%i/%s", | |
6052 | kind, | |
6053 | sigchld_code_to_string(code), status, | |
6054 | strna(code == CLD_EXITED | |
6055 | ? exit_status_to_string(status, EXIT_STATUS_FULL) | |
6056 | : signal_to_string(status))), | |
6057 | "EXIT_CODE=%s", sigchld_code_to_string(code), | |
6058 | "EXIT_STATUS=%i", status, | |
6059 | "COMMAND=%s", strna(command), | |
6060 | LOG_UNIT_ID(u), | |
6061 | LOG_UNIT_INVOCATION_ID(u)); | |
6062 | } | |
6063 | ||
7af67e9a LP |
6064 | int unit_exit_status(Unit *u) { |
6065 | assert(u); | |
6066 | ||
6067 | /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range | |
6068 | * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA | |
6069 | * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main | |
6070 | * service process has exited abnormally (signal/coredump). */ | |
6071 | ||
6072 | if (!UNIT_VTABLE(u)->exit_status) | |
6073 | return -EOPNOTSUPP; | |
6074 | ||
6075 | return UNIT_VTABLE(u)->exit_status(u); | |
6076 | } | |
6077 | ||
6078 | int unit_failure_action_exit_status(Unit *u) { | |
6079 | int r; | |
6080 | ||
6081 | assert(u); | |
6082 | ||
6083 | /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */ | |
6084 | ||
6085 | if (u->failure_action_exit_status >= 0) | |
6086 | return u->failure_action_exit_status; | |
6087 | ||
6088 | r = unit_exit_status(u); | |
6089 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
6090 | return 255; | |
6091 | ||
6092 | return r; | |
6093 | } | |
6094 | ||
6095 | int unit_success_action_exit_status(Unit *u) { | |
6096 | int r; | |
6097 | ||
6098 | assert(u); | |
6099 | ||
6100 | /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */ | |
6101 | ||
6102 | if (u->success_action_exit_status >= 0) | |
6103 | return u->success_action_exit_status; | |
6104 | ||
6105 | r = unit_exit_status(u); | |
6106 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
6107 | return 255; | |
6108 | ||
6109 | return r; | |
6110 | } | |
6111 | ||
a4191c9f LP |
6112 | int unit_test_trigger_loaded(Unit *u) { |
6113 | Unit *trigger; | |
6114 | ||
6115 | /* Tests whether the unit to trigger is loaded */ | |
6116 | ||
6117 | trigger = UNIT_TRIGGER(u); | |
6118 | if (!trigger) | |
e7b9f4d9 ZJS |
6119 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
6120 | "Refusing to start, no unit to trigger."); | |
a4191c9f | 6121 | if (trigger->load_state != UNIT_LOADED) |
e7b9f4d9 ZJS |
6122 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
6123 | "Refusing to start, unit %s to trigger not loaded.", trigger->id); | |
a4191c9f LP |
6124 | |
6125 | return 0; | |
6126 | } | |
6127 | ||
bb0c0d6f LP |
6128 | void unit_destroy_runtime_data(Unit *u, const ExecContext *context) { |
6129 | assert(u); | |
6130 | assert(context); | |
6131 | ||
95939aed YW |
6132 | if (context->runtime_directory_preserve_mode == EXEC_PRESERVE_NO || |
6133 | (context->runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART && !unit_will_restart(u))) | |
6134 | exec_context_destroy_runtime_directory(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME]); | |
bb0c0d6f LP |
6135 | |
6136 | exec_context_destroy_credentials(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME], u->id); | |
95939aed YW |
6137 | } |
6138 | ||
380dc8b0 LP |
6139 | int unit_clean(Unit *u, ExecCleanMask mask) { |
6140 | UnitActiveState state; | |
6141 | ||
6142 | assert(u); | |
6143 | ||
6144 | /* Special return values: | |
6145 | * | |
6146 | * -EOPNOTSUPP → cleaning not supported for this unit type | |
6147 | * -EUNATCH → cleaning not defined for this resource type | |
6148 | * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has | |
6149 | * a job queued or similar | |
6150 | */ | |
6151 | ||
6152 | if (!UNIT_VTABLE(u)->clean) | |
6153 | return -EOPNOTSUPP; | |
6154 | ||
6155 | if (mask == 0) | |
6156 | return -EUNATCH; | |
6157 | ||
6158 | if (u->load_state != UNIT_LOADED) | |
6159 | return -EBUSY; | |
6160 | ||
6161 | if (u->job) | |
6162 | return -EBUSY; | |
6163 | ||
6164 | state = unit_active_state(u); | |
6165 | if (!IN_SET(state, UNIT_INACTIVE)) | |
6166 | return -EBUSY; | |
6167 | ||
6168 | return UNIT_VTABLE(u)->clean(u, mask); | |
6169 | } | |
6170 | ||
6171 | int unit_can_clean(Unit *u, ExecCleanMask *ret) { | |
6172 | assert(u); | |
6173 | ||
6174 | if (!UNIT_VTABLE(u)->clean || | |
6175 | u->load_state != UNIT_LOADED) { | |
6176 | *ret = 0; | |
6177 | return 0; | |
6178 | } | |
6179 | ||
6180 | /* When the clean() method is set, can_clean() really should be set too */ | |
6181 | assert(UNIT_VTABLE(u)->can_clean); | |
6182 | ||
6183 | return UNIT_VTABLE(u)->can_clean(u, ret); | |
6184 | } | |
6185 | ||
d9e45bc3 MS |
6186 | bool unit_can_freeze(Unit *u) { |
6187 | assert(u); | |
6188 | ||
6189 | if (UNIT_VTABLE(u)->can_freeze) | |
6190 | return UNIT_VTABLE(u)->can_freeze(u); | |
6191 | ||
6192 | return UNIT_VTABLE(u)->freeze; | |
6193 | } | |
6194 | ||
6195 | void unit_frozen(Unit *u) { | |
6196 | assert(u); | |
6197 | ||
6198 | u->freezer_state = FREEZER_FROZEN; | |
6199 | ||
6200 | bus_unit_send_pending_freezer_message(u); | |
6201 | } | |
6202 | ||
6203 | void unit_thawed(Unit *u) { | |
6204 | assert(u); | |
6205 | ||
6206 | u->freezer_state = FREEZER_RUNNING; | |
6207 | ||
6208 | bus_unit_send_pending_freezer_message(u); | |
6209 | } | |
6210 | ||
6211 | static int unit_freezer_action(Unit *u, FreezerAction action) { | |
6212 | UnitActiveState s; | |
6213 | int (*method)(Unit*); | |
6214 | int r; | |
6215 | ||
6216 | assert(u); | |
6217 | assert(IN_SET(action, FREEZER_FREEZE, FREEZER_THAW)); | |
6218 | ||
6219 | method = action == FREEZER_FREEZE ? UNIT_VTABLE(u)->freeze : UNIT_VTABLE(u)->thaw; | |
6220 | if (!method || !cg_freezer_supported()) | |
6221 | return -EOPNOTSUPP; | |
6222 | ||
6223 | if (u->job) | |
6224 | return -EBUSY; | |
6225 | ||
6226 | if (u->load_state != UNIT_LOADED) | |
6227 | return -EHOSTDOWN; | |
6228 | ||
6229 | s = unit_active_state(u); | |
6230 | if (s != UNIT_ACTIVE) | |
6231 | return -EHOSTDOWN; | |
6232 | ||
6233 | if (IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_THAWING)) | |
6234 | return -EALREADY; | |
6235 | ||
6236 | r = method(u); | |
6237 | if (r <= 0) | |
6238 | return r; | |
6239 | ||
6240 | return 1; | |
6241 | } | |
6242 | ||
6243 | int unit_freeze(Unit *u) { | |
6244 | return unit_freezer_action(u, FREEZER_FREEZE); | |
6245 | } | |
6246 | ||
6247 | int unit_thaw(Unit *u) { | |
6248 | return unit_freezer_action(u, FREEZER_THAW); | |
6249 | } | |
6250 | ||
6251 | /* Wrappers around low-level cgroup freezer operations common for service and scope units */ | |
6252 | int unit_freeze_vtable_common(Unit *u) { | |
6253 | return unit_cgroup_freezer_action(u, FREEZER_FREEZE); | |
6254 | } | |
6255 | ||
6256 | int unit_thaw_vtable_common(Unit *u) { | |
6257 | return unit_cgroup_freezer_action(u, FREEZER_THAW); | |
6258 | } | |
6259 | ||
5afe510c LP |
6260 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
6261 | [COLLECT_INACTIVE] = "inactive", | |
6262 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
6263 | }; | |
6264 | ||
6265 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); |