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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> |
4f5dd394 | 5 | #include <string.h> |
4c253ed1 | 6 | #include <sys/prctl.h> |
45fb0699 | 7 | #include <sys/stat.h> |
4f5dd394 | 8 | #include <unistd.h> |
87f0e418 | 9 | |
718db961 LP |
10 | #include "sd-id128.h" |
11 | #include "sd-messages.h" | |
4f5dd394 | 12 | |
57b7a260 | 13 | #include "all-units.h" |
d68c645b | 14 | #include "alloc-util.h" |
fab34748 | 15 | #include "bpf-firewall.h" |
4f5dd394 LP |
16 | #include "bus-common-errors.h" |
17 | #include "bus-util.h" | |
c6c18be3 | 18 | #include "cgroup-util.h" |
4f5dd394 LP |
19 | #include "dbus-unit.h" |
20 | #include "dbus.h" | |
21 | #include "dropin.h" | |
22 | #include "escape.h" | |
23 | #include "execute.h" | |
6a48d82f | 24 | #include "fd-util.h" |
a5c32cff | 25 | #include "fileio-label.h" |
ee228be1 | 26 | #include "fileio.h" |
f97b34a6 | 27 | #include "format-util.h" |
d3070fbd | 28 | #include "fs-util.h" |
4b58153d | 29 | #include "id128-util.h" |
915b1d01 | 30 | #include "io-util.h" |
5cfa33e0 | 31 | #include "install.h" |
4f5dd394 LP |
32 | #include "load-dropin.h" |
33 | #include "load-fragment.h" | |
34 | #include "log.h" | |
35 | #include "macro.h" | |
36 | #include "missing.h" | |
37 | #include "mkdir.h" | |
6bedfcbb | 38 | #include "parse-util.h" |
4f5dd394 | 39 | #include "path-util.h" |
0b452006 | 40 | #include "process-util.h" |
810ef318 | 41 | #include "rm-rf.h" |
d68c645b | 42 | #include "serialize.h" |
4f5dd394 | 43 | #include "set.h" |
6eb7c172 | 44 | #include "signal-util.h" |
d3070fbd | 45 | #include "sparse-endian.h" |
e9db43d5 | 46 | #include "special.h" |
2e59b241 | 47 | #include "specifier.h" |
8fcde012 | 48 | #include "stat-util.h" |
d054f0a4 | 49 | #include "stdio-util.h" |
5afe510c | 50 | #include "string-table.h" |
07630cea | 51 | #include "string-util.h" |
4f5dd394 | 52 | #include "strv.h" |
5b262f74 | 53 | #include "terminal-util.h" |
e4de7287 | 54 | #include "tmpfile-util.h" |
4f4afc88 | 55 | #include "umask-util.h" |
4f5dd394 | 56 | #include "unit-name.h" |
e9db43d5 | 57 | #include "unit.h" |
b1d4f8e1 LP |
58 | #include "user-util.h" |
59 | #include "virt.h" | |
87f0e418 | 60 | |
37109b85 ZJS |
61 | /* Thresholds for logging at INFO level about resource consumption */ |
62 | #define MENTIONWORTHY_CPU_NSEC (1 * NSEC_PER_SEC) | |
63 | #define MENTIONWORTHY_IO_BYTES (1024 * 1024ULL) | |
64 | #define MENTIONWORTHY_IP_BYTES (0ULL) | |
65 | ||
66 | /* Thresholds for logging at INFO level about resource consumption */ | |
67 | #define NOTICEWORTHY_CPU_NSEC (10*60 * NSEC_PER_SEC) /* 10 minutes */ | |
68 | #define NOTICEWORTHY_IO_BYTES (10 * 1024 * 1024ULL) /* 10 MB */ | |
69 | #define NOTICEWORTHY_IP_BYTES (128 * 1024 * 1024ULL) /* 128 MB */ | |
70 | ||
87f0e418 LP |
71 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { |
72 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 LP |
73 | [UNIT_SOCKET] = &socket_vtable, |
74 | [UNIT_TARGET] = &target_vtable, | |
75 | [UNIT_DEVICE] = &device_vtable, | |
76 | [UNIT_MOUNT] = &mount_vtable, | |
77 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 78 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 79 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 80 | [UNIT_PATH] = &path_vtable, |
6c12b52e | 81 | [UNIT_SLICE] = &slice_vtable, |
5afe510c | 82 | [UNIT_SCOPE] = &scope_vtable, |
87f0e418 LP |
83 | }; |
84 | ||
f2341e0a | 85 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 86 | |
7d17cfbc | 87 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
88 | Unit *u; |
89 | ||
90 | assert(m); | |
ac155bb8 | 91 | assert(size >= sizeof(Unit)); |
87f0e418 | 92 | |
7d17cfbc MS |
93 | u = malloc0(size); |
94 | if (!u) | |
87f0e418 LP |
95 | return NULL; |
96 | ||
d5099efc | 97 | u->names = set_new(&string_hash_ops); |
6b430fdb ZJS |
98 | if (!u->names) |
99 | return mfree(u); | |
87f0e418 | 100 | |
ac155bb8 MS |
101 | u->manager = m; |
102 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
103 | u->default_dependencies = true; |
104 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 105 | u->unit_file_preset = -1; |
d420282b | 106 | u->on_failure_job_mode = JOB_REPLACE; |
0bb814c2 | 107 | u->cgroup_control_inotify_wd = -1; |
afcfaa69 | 108 | u->cgroup_memory_inotify_wd = -1; |
36c16a7c | 109 | u->job_timeout = USEC_INFINITY; |
a2df3ea4 | 110 | u->job_running_timeout = USEC_INFINITY; |
00d9ef85 LP |
111 | u->ref_uid = UID_INVALID; |
112 | u->ref_gid = GID_INVALID; | |
fe700f46 | 113 | u->cpu_usage_last = NSEC_INFINITY; |
17f14955 | 114 | u->cgroup_invalidated_mask |= CGROUP_MASK_BPF_FIREWALL; |
7af67e9a | 115 | u->failure_action_exit_status = u->success_action_exit_status = -1; |
87f0e418 | 116 | |
6a48d82f DM |
117 | u->ip_accounting_ingress_map_fd = -1; |
118 | u->ip_accounting_egress_map_fd = -1; | |
119 | u->ipv4_allow_map_fd = -1; | |
120 | u->ipv6_allow_map_fd = -1; | |
121 | u->ipv4_deny_map_fd = -1; | |
122 | u->ipv6_deny_map_fd = -1; | |
123 | ||
2e59b241 LP |
124 | u->last_section_private = -1; |
125 | ||
7bf081a1 | 126 | u->start_ratelimit = (RateLimit) { m->default_start_limit_interval, m->default_start_limit_burst }; |
8c227e7f | 127 | u->auto_stop_ratelimit = (RateLimit) { 10 * USEC_PER_SEC, 16 }; |
bea355da | 128 | |
fbe14fc9 LP |
129 | for (CGroupIOAccountingMetric i = 0; i < _CGROUP_IO_ACCOUNTING_METRIC_MAX; i++) |
130 | u->io_accounting_last[i] = UINT64_MAX; | |
131 | ||
87f0e418 LP |
132 | return u; |
133 | } | |
134 | ||
a581e45a | 135 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
dc409696 | 136 | _cleanup_(unit_freep) Unit *u = NULL; |
a581e45a LP |
137 | int r; |
138 | ||
139 | u = unit_new(m, size); | |
140 | if (!u) | |
141 | return -ENOMEM; | |
142 | ||
143 | r = unit_add_name(u, name); | |
dc409696 | 144 | if (r < 0) |
a581e45a | 145 | return r; |
a581e45a | 146 | |
1cc6c93a YW |
147 | *ret = TAKE_PTR(u); |
148 | ||
a581e45a LP |
149 | return r; |
150 | } | |
151 | ||
303ee601 | 152 | bool unit_has_name(const Unit *u, const char *name) { |
f278026d LP |
153 | assert(u); |
154 | assert(name); | |
155 | ||
390bc2b1 | 156 | return set_contains(u->names, (char*) name); |
f278026d LP |
157 | } |
158 | ||
598459ce LP |
159 | static void unit_init(Unit *u) { |
160 | CGroupContext *cc; | |
161 | ExecContext *ec; | |
162 | KillContext *kc; | |
163 | ||
164 | assert(u); | |
165 | assert(u->manager); | |
166 | assert(u->type >= 0); | |
167 | ||
168 | cc = unit_get_cgroup_context(u); | |
169 | if (cc) { | |
170 | cgroup_context_init(cc); | |
171 | ||
172 | /* Copy in the manager defaults into the cgroup | |
173 | * context, _before_ the rest of the settings have | |
174 | * been initialized */ | |
175 | ||
176 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
13c31542 | 177 | cc->io_accounting = u->manager->default_io_accounting; |
598459ce LP |
178 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
179 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 180 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
6a48d82f | 181 | cc->ip_accounting = u->manager->default_ip_accounting; |
0af20ea2 LP |
182 | |
183 | if (u->type != UNIT_SLICE) | |
184 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
185 | } |
186 | ||
187 | ec = unit_get_exec_context(u); | |
b1edf445 | 188 | if (ec) { |
598459ce LP |
189 | exec_context_init(ec); |
190 | ||
b1edf445 | 191 | ec->keyring_mode = MANAGER_IS_SYSTEM(u->manager) ? |
00f5ad93 | 192 | EXEC_KEYRING_SHARED : EXEC_KEYRING_INHERIT; |
b1edf445 LP |
193 | } |
194 | ||
598459ce LP |
195 | kc = unit_get_kill_context(u); |
196 | if (kc) | |
197 | kill_context_init(kc); | |
198 | ||
199 | if (UNIT_VTABLE(u)->init) | |
200 | UNIT_VTABLE(u)->init(u); | |
201 | } | |
202 | ||
87f0e418 | 203 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 204 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 205 | UnitType t; |
87f0e418 LP |
206 | int r; |
207 | ||
208 | assert(u); | |
209 | assert(text); | |
210 | ||
7410616c | 211 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 212 | |
ac155bb8 | 213 | if (!u->instance) |
9e2f7c11 | 214 | return -EINVAL; |
87f0e418 | 215 | |
7410616c LP |
216 | r = unit_name_replace_instance(text, u->instance, &s); |
217 | if (r < 0) | |
218 | return r; | |
219 | } else { | |
9e2f7c11 | 220 | s = strdup(text); |
7410616c LP |
221 | if (!s) |
222 | return -ENOMEM; | |
223 | } | |
87f0e418 | 224 | |
7410616c LP |
225 | if (set_contains(u->names, s)) |
226 | return 0; | |
227 | if (hashmap_contains(u->manager->units, s)) | |
228 | return -EEXIST; | |
229 | ||
230 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 231 | return -EINVAL; |
e537352b | 232 | |
7410616c LP |
233 | t = unit_name_to_type(s); |
234 | if (t < 0) | |
235 | return -EINVAL; | |
87f0e418 | 236 | |
598459ce LP |
237 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
238 | return -EINVAL; | |
87f0e418 | 239 | |
e48614c4 ZJS |
240 | r = unit_name_to_instance(s, &i); |
241 | if (r < 0) | |
598459ce | 242 | return r; |
87f0e418 | 243 | |
ce99c68a | 244 | if (i && !unit_type_may_template(t)) |
598459ce | 245 | return -EINVAL; |
9e2f7c11 | 246 | |
276c3e78 | 247 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
248 | * but not both. Note that we do allow names with different |
249 | * instance names however! */ | |
598459ce LP |
250 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
251 | return -EINVAL; | |
9e2f7c11 | 252 | |
8a993b61 | 253 | if (!unit_type_may_alias(t) && !set_isempty(u->names)) |
598459ce | 254 | return -EEXIST; |
9e2f7c11 | 255 | |
598459ce LP |
256 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
257 | return -E2BIG; | |
4f0f902f | 258 | |
e48614c4 | 259 | r = set_put(u->names, s); |
7410616c | 260 | if (r < 0) |
598459ce | 261 | return r; |
7410616c | 262 | assert(r > 0); |
87f0e418 | 263 | |
e48614c4 ZJS |
264 | r = hashmap_put(u->manager->units, s, u); |
265 | if (r < 0) { | |
7410616c | 266 | (void) set_remove(u->names, s); |
598459ce | 267 | return r; |
87f0e418 LP |
268 | } |
269 | ||
ac155bb8 | 270 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
271 | u->type = t; |
272 | u->id = s; | |
1cc6c93a | 273 | u->instance = TAKE_PTR(i); |
9e2f7c11 | 274 | |
71fda00f | 275 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 276 | |
598459ce | 277 | unit_init(u); |
598459ce | 278 | } |
9e2f7c11 | 279 | |
598459ce | 280 | s = NULL; |
9e2f7c11 | 281 | |
598459ce LP |
282 | unit_add_to_dbus_queue(u); |
283 | return 0; | |
87f0e418 LP |
284 | } |
285 | ||
0ae97ec1 | 286 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 287 | _cleanup_free_ char *t = NULL; |
598459ce | 288 | char *s, *i; |
276c3e78 | 289 | int r; |
0ae97ec1 LP |
290 | |
291 | assert(u); | |
292 | assert(name); | |
293 | ||
7410616c | 294 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 295 | |
ac155bb8 | 296 | if (!u->instance) |
9e2f7c11 LP |
297 | return -EINVAL; |
298 | ||
7410616c LP |
299 | r = unit_name_replace_instance(name, u->instance, &t); |
300 | if (r < 0) | |
301 | return r; | |
9e2f7c11 LP |
302 | |
303 | name = t; | |
304 | } | |
305 | ||
0ae97ec1 | 306 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 307 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 308 | if (!s) |
0ae97ec1 LP |
309 | return -ENOENT; |
310 | ||
7410616c | 311 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
312 | r = unit_name_to_instance(s, &i); |
313 | if (r < 0) | |
276c3e78 LP |
314 | return r; |
315 | ||
ac155bb8 | 316 | u->id = s; |
276c3e78 | 317 | |
ac155bb8 MS |
318 | free(u->instance); |
319 | u->instance = i; | |
276c3e78 | 320 | |
c1e1601e | 321 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 322 | |
0ae97ec1 LP |
323 | return 0; |
324 | } | |
325 | ||
f50e0a01 | 326 | int unit_set_description(Unit *u, const char *description) { |
84b26d51 | 327 | int r; |
f50e0a01 LP |
328 | |
329 | assert(u); | |
330 | ||
84b26d51 LP |
331 | r = free_and_strdup(&u->description, empty_to_null(description)); |
332 | if (r < 0) | |
333 | return r; | |
334 | if (r > 0) | |
335 | unit_add_to_dbus_queue(u); | |
c1e1601e | 336 | |
f50e0a01 LP |
337 | return 0; |
338 | } | |
339 | ||
f2f725e5 | 340 | bool unit_may_gc(Unit *u) { |
a354329f | 341 | UnitActiveState state; |
e98b2fbb | 342 | int r; |
5afe510c | 343 | |
701cc384 LP |
344 | assert(u); |
345 | ||
f2f725e5 ZJS |
346 | /* Checks whether the unit is ready to be unloaded for garbage collection. |
347 | * Returns true when the unit may be collected, and false if there's some | |
2641f02e ZJS |
348 | * reason to keep it loaded. |
349 | * | |
350 | * References from other units are *not* checked here. Instead, this is done | |
351 | * in unit_gc_sweep(), but using markers to properly collect dependency loops. | |
352 | */ | |
5afe510c | 353 | |
a354329f | 354 | if (u->job) |
f2f725e5 | 355 | return false; |
701cc384 | 356 | |
a354329f | 357 | if (u->nop_job) |
f2f725e5 | 358 | return false; |
6c073082 | 359 | |
a354329f LP |
360 | state = unit_active_state(u); |
361 | ||
7eb2a8a1 | 362 | /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */ |
a354329f LP |
363 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && |
364 | UNIT_VTABLE(u)->release_resources) | |
7eb2a8a1 | 365 | UNIT_VTABLE(u)->release_resources(u); |
a354329f | 366 | |
f5869324 | 367 | if (u->perpetual) |
f2f725e5 | 368 | return false; |
9d576438 | 369 | |
05a98afd | 370 | if (sd_bus_track_count(u->bus_track) > 0) |
f2f725e5 | 371 | return false; |
05a98afd | 372 | |
5afe510c LP |
373 | /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */ |
374 | switch (u->collect_mode) { | |
375 | ||
376 | case COLLECT_INACTIVE: | |
377 | if (state != UNIT_INACTIVE) | |
f2f725e5 | 378 | return false; |
5afe510c LP |
379 | |
380 | break; | |
381 | ||
382 | case COLLECT_INACTIVE_OR_FAILED: | |
383 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
f2f725e5 | 384 | return false; |
5afe510c LP |
385 | |
386 | break; | |
387 | ||
388 | default: | |
389 | assert_not_reached("Unknown garbage collection mode"); | |
390 | } | |
391 | ||
e98b2fbb LP |
392 | if (u->cgroup_path) { |
393 | /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay | |
394 | * around. Units with active processes should never be collected. */ | |
395 | ||
396 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
397 | if (r < 0) | |
398 | log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", u->cgroup_path); | |
399 | if (r <= 0) | |
f2f725e5 | 400 | return false; |
e98b2fbb LP |
401 | } |
402 | ||
f2f725e5 ZJS |
403 | if (UNIT_VTABLE(u)->may_gc && !UNIT_VTABLE(u)->may_gc(u)) |
404 | return false; | |
701cc384 | 405 | |
f2f725e5 | 406 | return true; |
701cc384 LP |
407 | } |
408 | ||
87f0e418 LP |
409 | void unit_add_to_load_queue(Unit *u) { |
410 | assert(u); | |
ac155bb8 | 411 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 412 | |
ac155bb8 | 413 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
414 | return; |
415 | ||
71fda00f | 416 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 417 | u->in_load_queue = true; |
87f0e418 LP |
418 | } |
419 | ||
23a177ef LP |
420 | void unit_add_to_cleanup_queue(Unit *u) { |
421 | assert(u); | |
422 | ||
ac155bb8 | 423 | if (u->in_cleanup_queue) |
23a177ef LP |
424 | return; |
425 | ||
71fda00f | 426 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 427 | u->in_cleanup_queue = true; |
23a177ef LP |
428 | } |
429 | ||
701cc384 LP |
430 | void unit_add_to_gc_queue(Unit *u) { |
431 | assert(u); | |
432 | ||
ac155bb8 | 433 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
434 | return; |
435 | ||
f2f725e5 | 436 | if (!unit_may_gc(u)) |
701cc384 LP |
437 | return; |
438 | ||
c5a97ed1 | 439 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 440 | u->in_gc_queue = true; |
701cc384 LP |
441 | } |
442 | ||
c1e1601e LP |
443 | void unit_add_to_dbus_queue(Unit *u) { |
444 | assert(u); | |
ac155bb8 | 445 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 446 | |
ac155bb8 | 447 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
448 | return; |
449 | ||
a567261a | 450 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 451 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 452 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 453 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 454 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
455 | return; |
456 | } | |
457 | ||
71fda00f | 458 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 459 | u->in_dbus_queue = true; |
c1e1601e LP |
460 | } |
461 | ||
fda09318 | 462 | void unit_submit_to_stop_when_unneeded_queue(Unit *u) { |
a3c1168a LP |
463 | assert(u); |
464 | ||
465 | if (u->in_stop_when_unneeded_queue) | |
466 | return; | |
467 | ||
468 | if (!u->stop_when_unneeded) | |
469 | return; | |
470 | ||
471 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
472 | return; | |
473 | ||
474 | LIST_PREPEND(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
475 | u->in_stop_when_unneeded_queue = true; | |
476 | } | |
477 | ||
eef85c4a | 478 | static void bidi_set_free(Unit *u, Hashmap *h) { |
87f0e418 | 479 | Unit *other; |
eef85c4a LP |
480 | Iterator i; |
481 | void *v; | |
87f0e418 LP |
482 | |
483 | assert(u); | |
484 | ||
eef85c4a | 485 | /* Frees the hashmap and makes sure we are dropped from the inverse pointers */ |
87f0e418 | 486 | |
eef85c4a | 487 | HASHMAP_FOREACH_KEY(v, other, h, i) { |
87f0e418 LP |
488 | UnitDependency d; |
489 | ||
490 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
eef85c4a | 491 | hashmap_remove(other->dependencies[d], u); |
701cc384 LP |
492 | |
493 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
494 | } |
495 | ||
eef85c4a | 496 | hashmap_free(h); |
87f0e418 LP |
497 | } |
498 | ||
c2756a68 LP |
499 | static void unit_remove_transient(Unit *u) { |
500 | char **i; | |
501 | ||
502 | assert(u); | |
503 | ||
504 | if (!u->transient) | |
505 | return; | |
506 | ||
507 | if (u->fragment_path) | |
3f5e8115 | 508 | (void) unlink(u->fragment_path); |
c2756a68 LP |
509 | |
510 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 511 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 512 | |
39591351 LP |
513 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
514 | if (!p) | |
515 | continue; | |
516 | ||
517 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
518 | if (!pp) | |
519 | continue; | |
520 | ||
521 | /* Only drop transient drop-ins */ | |
522 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
523 | continue; | |
c2756a68 | 524 | |
39591351 LP |
525 | (void) unlink(*i); |
526 | (void) rmdir(p); | |
c2756a68 LP |
527 | } |
528 | } | |
529 | ||
a57f7e2c | 530 | static void unit_free_requires_mounts_for(Unit *u) { |
eef85c4a | 531 | assert(u); |
a57f7e2c | 532 | |
eef85c4a LP |
533 | for (;;) { |
534 | _cleanup_free_ char *path; | |
a57f7e2c | 535 | |
eef85c4a LP |
536 | path = hashmap_steal_first_key(u->requires_mounts_for); |
537 | if (!path) | |
538 | break; | |
539 | else { | |
540 | char s[strlen(path) + 1]; | |
a57f7e2c | 541 | |
eef85c4a LP |
542 | PATH_FOREACH_PREFIX_MORE(s, path) { |
543 | char *y; | |
544 | Set *x; | |
545 | ||
546 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
547 | if (!x) | |
548 | continue; | |
a57f7e2c | 549 | |
eef85c4a | 550 | (void) set_remove(x, u); |
a57f7e2c | 551 | |
eef85c4a LP |
552 | if (set_isempty(x)) { |
553 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
554 | free(y); | |
555 | set_free(x); | |
556 | } | |
a57f7e2c LP |
557 | } |
558 | } | |
559 | } | |
560 | ||
eef85c4a | 561 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
a57f7e2c LP |
562 | } |
563 | ||
598459ce LP |
564 | static void unit_done(Unit *u) { |
565 | ExecContext *ec; | |
566 | CGroupContext *cc; | |
567 | ||
568 | assert(u); | |
569 | ||
570 | if (u->type < 0) | |
571 | return; | |
572 | ||
573 | if (UNIT_VTABLE(u)->done) | |
574 | UNIT_VTABLE(u)->done(u); | |
575 | ||
576 | ec = unit_get_exec_context(u); | |
577 | if (ec) | |
578 | exec_context_done(ec); | |
579 | ||
580 | cc = unit_get_cgroup_context(u); | |
581 | if (cc) | |
582 | cgroup_context_done(cc); | |
583 | } | |
584 | ||
87f0e418 LP |
585 | void unit_free(Unit *u) { |
586 | UnitDependency d; | |
587 | Iterator i; | |
588 | char *t; | |
589 | ||
c9d5c9c0 LP |
590 | if (!u) |
591 | return; | |
87f0e418 | 592 | |
b8b6f321 LP |
593 | if (UNIT_ISSET(u->slice)) { |
594 | /* A unit is being dropped from the tree, make sure our parent slice recalculates the member mask */ | |
595 | unit_invalidate_cgroup_members_masks(UNIT_DEREF(u->slice)); | |
596 | ||
597 | /* And make sure the parent is realized again, updating cgroup memberships */ | |
598 | unit_add_to_cgroup_realize_queue(UNIT_DEREF(u->slice)); | |
599 | } | |
600 | ||
50fb00b7 | 601 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 602 | |
2c289ea8 | 603 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
604 | unit_remove_transient(u); |
605 | ||
c1e1601e LP |
606 | bus_unit_send_removed_signal(u); |
607 | ||
598459ce | 608 | unit_done(u); |
a013b84b | 609 | |
50be4f4a | 610 | unit_dequeue_rewatch_pids(u); |
cf9fd508 | 611 | |
50be4f4a | 612 | sd_bus_slot_unref(u->match_bus_slot); |
05a98afd LP |
613 | sd_bus_track_unref(u->bus_track); |
614 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
615 | ||
a57f7e2c LP |
616 | unit_free_requires_mounts_for(u); |
617 | ||
ac155bb8 MS |
618 | SET_FOREACH(t, u->names, i) |
619 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 620 | |
4b58153d LP |
621 | if (!sd_id128_is_null(u->invocation_id)) |
622 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
623 | ||
97e7d748 MS |
624 | if (u->job) { |
625 | Job *j = u->job; | |
626 | job_uninstall(j); | |
627 | job_free(j); | |
628 | } | |
964e0949 | 629 | |
e0209d83 MS |
630 | if (u->nop_job) { |
631 | Job *j = u->nop_job; | |
632 | job_uninstall(j); | |
633 | job_free(j); | |
634 | } | |
635 | ||
964e0949 | 636 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 637 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 638 | |
adefcf28 LP |
639 | if (u->on_console) |
640 | manager_unref_console(u->manager); | |
641 | ||
efdb0237 | 642 | unit_release_cgroup(u); |
72673e86 | 643 | |
d3070fbd LP |
644 | if (!MANAGER_IS_RELOADING(u->manager)) |
645 | unit_unlink_state_files(u); | |
646 | ||
00d9ef85 LP |
647 | unit_unref_uid_gid(u, false); |
648 | ||
5269eb6b | 649 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 650 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 651 | |
a911bb9a LP |
652 | unit_unwatch_all_pids(u); |
653 | ||
702a2d8f | 654 | unit_ref_unset(&u->slice); |
7f7d01ed ZJS |
655 | while (u->refs_by_target) |
656 | unit_ref_unset(u->refs_by_target); | |
57020a3a | 657 | |
ac155bb8 | 658 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 659 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 660 | |
ac155bb8 | 661 | if (u->in_load_queue) |
71fda00f | 662 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 663 | |
ac155bb8 | 664 | if (u->in_dbus_queue) |
71fda00f | 665 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 666 | |
a2d72e26 | 667 | if (u->in_gc_queue) |
c5a97ed1 | 668 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 669 | |
91a6073e LP |
670 | if (u->in_cgroup_realize_queue) |
671 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 672 | |
09e24654 LP |
673 | if (u->in_cgroup_empty_queue) |
674 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
675 | ||
1bdf2790 ZJS |
676 | if (u->in_cleanup_queue) |
677 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
adefcf28 | 678 | |
19496554 MS |
679 | if (u->in_target_deps_queue) |
680 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
681 | ||
a3c1168a LP |
682 | if (u->in_stop_when_unneeded_queue) |
683 | LIST_REMOVE(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
684 | ||
6a48d82f DM |
685 | safe_close(u->ip_accounting_ingress_map_fd); |
686 | safe_close(u->ip_accounting_egress_map_fd); | |
72673e86 | 687 | |
6a48d82f DM |
688 | safe_close(u->ipv4_allow_map_fd); |
689 | safe_close(u->ipv6_allow_map_fd); | |
690 | safe_close(u->ipv4_deny_map_fd); | |
691 | safe_close(u->ipv6_deny_map_fd); | |
d3070fbd | 692 | |
6a48d82f | 693 | bpf_program_unref(u->ip_bpf_ingress); |
aa2b6f1d | 694 | bpf_program_unref(u->ip_bpf_ingress_installed); |
6a48d82f | 695 | bpf_program_unref(u->ip_bpf_egress); |
aa2b6f1d | 696 | bpf_program_unref(u->ip_bpf_egress_installed); |
00d9ef85 | 697 | |
fab34748 KL |
698 | set_free(u->ip_bpf_custom_ingress); |
699 | set_free(u->ip_bpf_custom_egress); | |
700 | set_free(u->ip_bpf_custom_ingress_installed); | |
701 | set_free(u->ip_bpf_custom_egress_installed); | |
702 | ||
084c7007 RG |
703 | bpf_program_unref(u->bpf_device_control_installed); |
704 | ||
a946fa9b ZJS |
705 | condition_free_list(u->conditions); |
706 | condition_free_list(u->asserts); | |
f755e3b7 | 707 | |
ac155bb8 | 708 | free(u->description); |
49dbfa7b | 709 | strv_free(u->documentation); |
ac155bb8 | 710 | free(u->fragment_path); |
1b64d026 | 711 | free(u->source_path); |
ae7a7182 | 712 | strv_free(u->dropin_paths); |
ac155bb8 | 713 | free(u->instance); |
87f0e418 | 714 | |
f189ab18 LP |
715 | free(u->job_timeout_reboot_arg); |
716 | ||
ac155bb8 | 717 | set_free_free(u->names); |
87f0e418 | 718 | |
6bf0f408 LP |
719 | free(u->reboot_arg); |
720 | ||
87f0e418 LP |
721 | free(u); |
722 | } | |
723 | ||
724 | UnitActiveState unit_active_state(Unit *u) { | |
725 | assert(u); | |
726 | ||
ac155bb8 | 727 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
728 | return unit_active_state(unit_follow_merge(u)); |
729 | ||
730 | /* After a reload it might happen that a unit is not correctly | |
731 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 732 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
733 | |
734 | return UNIT_VTABLE(u)->active_state(u); | |
735 | } | |
736 | ||
10a94420 LP |
737 | const char* unit_sub_state_to_string(Unit *u) { |
738 | assert(u); | |
739 | ||
740 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
741 | } | |
742 | ||
eef85c4a LP |
743 | static int set_complete_move(Set **s, Set **other) { |
744 | assert(s); | |
745 | assert(other); | |
746 | ||
747 | if (!other) | |
748 | return 0; | |
749 | ||
750 | if (*s) | |
751 | return set_move(*s, *other); | |
ae2a15bc LP |
752 | else |
753 | *s = TAKE_PTR(*other); | |
7c0b05e5 | 754 | |
eef85c4a LP |
755 | return 0; |
756 | } | |
757 | ||
758 | static int hashmap_complete_move(Hashmap **s, Hashmap **other) { | |
23a177ef LP |
759 | assert(s); |
760 | assert(other); | |
87f0e418 | 761 | |
23a177ef | 762 | if (!*other) |
7c0b05e5 | 763 | return 0; |
87f0e418 | 764 | |
eef85c4a LP |
765 | if (*s) |
766 | return hashmap_move(*s, *other); | |
ae2a15bc LP |
767 | else |
768 | *s = TAKE_PTR(*other); | |
7c0b05e5 MS |
769 | |
770 | return 0; | |
23a177ef | 771 | } |
87f0e418 | 772 | |
7c0b05e5 | 773 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
774 | char *t; |
775 | Iterator i; | |
7c0b05e5 | 776 | int r; |
87f0e418 | 777 | |
23a177ef LP |
778 | assert(u); |
779 | assert(other); | |
780 | ||
eef85c4a | 781 | r = set_complete_move(&u->names, &other->names); |
7c0b05e5 MS |
782 | if (r < 0) |
783 | return r; | |
23a177ef | 784 | |
ac155bb8 MS |
785 | set_free_free(other->names); |
786 | other->names = NULL; | |
787 | other->id = NULL; | |
23a177ef | 788 | |
ac155bb8 MS |
789 | SET_FOREACH(t, u->names, i) |
790 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
791 | |
792 | return 0; | |
87f0e418 LP |
793 | } |
794 | ||
09a65f92 MS |
795 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
796 | unsigned n_reserve; | |
797 | ||
798 | assert(u); | |
799 | assert(other); | |
800 | assert(d < _UNIT_DEPENDENCY_MAX); | |
801 | ||
802 | /* | |
803 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 804 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
805 | * as a whole to u by complete_move(). |
806 | */ | |
807 | if (!u->dependencies[d]) | |
808 | return 0; | |
809 | ||
810 | /* merge_dependencies() will skip a u-on-u dependency */ | |
eef85c4a | 811 | n_reserve = hashmap_size(other->dependencies[d]) - !!hashmap_get(other->dependencies[d], u); |
09a65f92 | 812 | |
eef85c4a | 813 | return hashmap_reserve(u->dependencies[d], n_reserve); |
09a65f92 MS |
814 | } |
815 | ||
d1fab3fe | 816 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
817 | Iterator i; |
818 | Unit *back; | |
eef85c4a | 819 | void *v; |
87f0e418 | 820 | int r; |
23a177ef | 821 | |
eef85c4a LP |
822 | /* Merges all dependencies of type 'd' of the unit 'other' into the deps of the unit 'u' */ |
823 | ||
23a177ef LP |
824 | assert(u); |
825 | assert(other); | |
826 | assert(d < _UNIT_DEPENDENCY_MAX); | |
827 | ||
5238e957 | 828 | /* Fix backwards pointers. Let's iterate through all dependent units of the other unit. */ |
eef85c4a | 829 | HASHMAP_FOREACH_KEY(v, back, other->dependencies[d], i) { |
23a177ef LP |
830 | UnitDependency k; |
831 | ||
eef85c4a LP |
832 | /* Let's now iterate through the dependencies of that dependencies of the other units, looking for |
833 | * pointers back, and let's fix them up, to instead point to 'u'. */ | |
834 | ||
e48614c4 | 835 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff | 836 | if (back == u) { |
eef85c4a LP |
837 | /* Do not add dependencies between u and itself. */ |
838 | if (hashmap_remove(back->dependencies[k], other)) | |
f2341e0a | 839 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff | 840 | } else { |
eef85c4a LP |
841 | UnitDependencyInfo di_u, di_other, di_merged; |
842 | ||
843 | /* Let's drop this dependency between "back" and "other", and let's create it between | |
844 | * "back" and "u" instead. Let's merge the bit masks of the dependency we are moving, | |
845 | * and any such dependency which might already exist */ | |
846 | ||
847 | di_other.data = hashmap_get(back->dependencies[k], other); | |
848 | if (!di_other.data) | |
849 | continue; /* dependency isn't set, let's try the next one */ | |
850 | ||
851 | di_u.data = hashmap_get(back->dependencies[k], u); | |
852 | ||
853 | di_merged = (UnitDependencyInfo) { | |
854 | .origin_mask = di_u.origin_mask | di_other.origin_mask, | |
855 | .destination_mask = di_u.destination_mask | di_other.destination_mask, | |
856 | }; | |
857 | ||
858 | r = hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data); | |
859 | if (r < 0) | |
860 | log_warning_errno(r, "Failed to remove/replace: back=%s other=%s u=%s: %m", back->id, other_id, u->id); | |
861 | assert(r >= 0); | |
862 | ||
863 | /* assert_se(hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data) >= 0); */ | |
e66047ff | 864 | } |
e48614c4 | 865 | } |
eef85c4a | 866 | |
23a177ef LP |
867 | } |
868 | ||
e66047ff | 869 | /* Also do not move dependencies on u to itself */ |
eef85c4a | 870 | back = hashmap_remove(other->dependencies[d], u); |
d1fab3fe | 871 | if (back) |
f2341e0a | 872 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 873 | |
7c0b05e5 | 874 | /* The move cannot fail. The caller must have performed a reservation. */ |
eef85c4a | 875 | assert_se(hashmap_complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); |
23a177ef | 876 | |
eef85c4a | 877 | other->dependencies[d] = hashmap_free(other->dependencies[d]); |
23a177ef LP |
878 | } |
879 | ||
880 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 881 | UnitDependency d; |
d1fab3fe | 882 | const char *other_id = NULL; |
09a65f92 | 883 | int r; |
87f0e418 LP |
884 | |
885 | assert(u); | |
886 | assert(other); | |
ac155bb8 MS |
887 | assert(u->manager == other->manager); |
888 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 889 | |
cc916967 LP |
890 | other = unit_follow_merge(other); |
891 | ||
23a177ef LP |
892 | if (other == u) |
893 | return 0; | |
894 | ||
ac155bb8 | 895 | if (u->type != other->type) |
9e2f7c11 LP |
896 | return -EINVAL; |
897 | ||
ac155bb8 | 898 | if (!u->instance != !other->instance) |
87f0e418 LP |
899 | return -EINVAL; |
900 | ||
8a993b61 | 901 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
902 | return -EEXIST; |
903 | ||
ec2ce0c5 | 904 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 905 | return -EEXIST; |
87f0e418 | 906 | |
ac155bb8 | 907 | if (other->job) |
819e213f LP |
908 | return -EEXIST; |
909 | ||
e0209d83 MS |
910 | if (other->nop_job) |
911 | return -EEXIST; | |
912 | ||
fdf20a31 | 913 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
914 | return -EEXIST; |
915 | ||
d1fab3fe ZJS |
916 | if (other->id) |
917 | other_id = strdupa(other->id); | |
918 | ||
09a65f92 MS |
919 | /* Make reservations to ensure merge_dependencies() won't fail */ |
920 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
921 | r = reserve_dependencies(u, other, d); | |
922 | /* | |
923 | * We don't rollback reservations if we fail. We don't have | |
924 | * a way to undo reservations. A reservation is not a leak. | |
925 | */ | |
926 | if (r < 0) | |
927 | return r; | |
928 | } | |
929 | ||
87f0e418 | 930 | /* Merge names */ |
7c0b05e5 MS |
931 | r = merge_names(u, other); |
932 | if (r < 0) | |
933 | return r; | |
87f0e418 | 934 | |
57020a3a | 935 | /* Redirect all references */ |
7f7d01ed ZJS |
936 | while (other->refs_by_target) |
937 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
57020a3a | 938 | |
87f0e418 LP |
939 | /* Merge dependencies */ |
940 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 941 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 942 | |
ac155bb8 MS |
943 | other->load_state = UNIT_MERGED; |
944 | other->merged_into = u; | |
23a177ef | 945 | |
3616a49c LP |
946 | /* If there is still some data attached to the other node, we |
947 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 948 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
949 | if (UNIT_VTABLE(other)->done) |
950 | UNIT_VTABLE(other)->done(other); | |
951 | ||
952 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
953 | unit_add_to_cleanup_queue(other); |
954 | ||
955 | return 0; | |
956 | } | |
957 | ||
958 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 959 | _cleanup_free_ char *s = NULL; |
23a177ef | 960 | Unit *other; |
9e2f7c11 | 961 | int r; |
23a177ef | 962 | |
e8630e69 ZJS |
963 | /* Either add name to u, or if a unit with name already exists, merge it with u. |
964 | * If name is a template, do the same for name@instance, where instance is u's instance. */ | |
965 | ||
23a177ef LP |
966 | assert(u); |
967 | assert(name); | |
968 | ||
7410616c | 969 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 970 | if (!u->instance) |
9e2f7c11 LP |
971 | return -EINVAL; |
972 | ||
7410616c LP |
973 | r = unit_name_replace_instance(name, u->instance, &s); |
974 | if (r < 0) | |
975 | return r; | |
9e2f7c11 LP |
976 | |
977 | name = s; | |
978 | } | |
979 | ||
c2756a68 | 980 | other = manager_get_unit(u->manager, name); |
7410616c LP |
981 | if (other) |
982 | return unit_merge(u, other); | |
23a177ef | 983 | |
7410616c | 984 | return unit_add_name(u, name); |
23a177ef LP |
985 | } |
986 | ||
987 | Unit* unit_follow_merge(Unit *u) { | |
988 | assert(u); | |
989 | ||
ac155bb8 MS |
990 | while (u->load_state == UNIT_MERGED) |
991 | assert_se(u = u->merged_into); | |
23a177ef LP |
992 | |
993 | return u; | |
994 | } | |
995 | ||
996 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
ada5e276 YW |
997 | ExecDirectoryType dt; |
998 | char **dp; | |
23a177ef LP |
999 | int r; |
1000 | ||
1001 | assert(u); | |
1002 | assert(c); | |
1003 | ||
e1e74614 | 1004 | if (c->working_directory && !c->working_directory_missing_ok) { |
eef85c4a | 1005 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1006 | if (r < 0) |
1007 | return r; | |
1008 | } | |
1009 | ||
1010 | if (c->root_directory) { | |
eef85c4a | 1011 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1012 | if (r < 0) |
1013 | return r; | |
1014 | } | |
1015 | ||
915e6d16 | 1016 | if (c->root_image) { |
eef85c4a | 1017 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
1018 | if (r < 0) |
1019 | return r; | |
1020 | } | |
1021 | ||
72fd1768 | 1022 | for (dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
1023 | if (!u->manager->prefix[dt]) |
1024 | continue; | |
1025 | ||
1026 | STRV_FOREACH(dp, c->directories[dt].paths) { | |
1027 | _cleanup_free_ char *p; | |
1028 | ||
657ee2d8 | 1029 | p = path_join(u->manager->prefix[dt], *dp); |
ada5e276 YW |
1030 | if (!p) |
1031 | return -ENOMEM; | |
1032 | ||
eef85c4a | 1033 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
1034 | if (r < 0) |
1035 | return r; | |
1036 | } | |
1037 | } | |
1038 | ||
463d0d15 | 1039 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
1040 | return 0; |
1041 | ||
1042 | if (c->private_tmp) { | |
d71f0505 LP |
1043 | const char *p; |
1044 | ||
1045 | FOREACH_STRING(p, "/tmp", "/var/tmp") { | |
eef85c4a | 1046 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
d71f0505 LP |
1047 | if (r < 0) |
1048 | return r; | |
1049 | } | |
b46a529c | 1050 | |
35d8c19a | 1051 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1052 | if (r < 0) |
1053 | return r; | |
1054 | } | |
1055 | ||
52c239d7 LB |
1056 | if (!IN_SET(c->std_output, |
1057 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1058 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1059 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE) && | |
1060 | !IN_SET(c->std_error, | |
1061 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1062 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1063 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE)) | |
23a177ef LP |
1064 | return 0; |
1065 | ||
1066 | /* If syslog or kernel logging is requested, make sure our own | |
1067 | * logging daemon is run first. */ | |
1068 | ||
35d8c19a | 1069 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1070 | if (r < 0) |
1071 | return r; | |
23a177ef | 1072 | |
87f0e418 LP |
1073 | return 0; |
1074 | } | |
1075 | ||
87f0e418 LP |
1076 | const char *unit_description(Unit *u) { |
1077 | assert(u); | |
1078 | ||
ac155bb8 MS |
1079 | if (u->description) |
1080 | return u->description; | |
87f0e418 | 1081 | |
ac155bb8 | 1082 | return strna(u->id); |
87f0e418 LP |
1083 | } |
1084 | ||
2a8f53c6 ZJS |
1085 | const char *unit_status_string(Unit *u) { |
1086 | assert(u); | |
1087 | ||
1088 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_NAME && u->id) | |
1089 | return u->id; | |
1090 | ||
1091 | return unit_description(u); | |
1092 | } | |
1093 | ||
eef85c4a LP |
1094 | static void print_unit_dependency_mask(FILE *f, const char *kind, UnitDependencyMask mask, bool *space) { |
1095 | const struct { | |
1096 | UnitDependencyMask mask; | |
1097 | const char *name; | |
1098 | } table[] = { | |
1099 | { UNIT_DEPENDENCY_FILE, "file" }, | |
1100 | { UNIT_DEPENDENCY_IMPLICIT, "implicit" }, | |
1101 | { UNIT_DEPENDENCY_DEFAULT, "default" }, | |
1102 | { UNIT_DEPENDENCY_UDEV, "udev" }, | |
1103 | { UNIT_DEPENDENCY_PATH, "path" }, | |
1104 | { UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT, "mountinfo-implicit" }, | |
1105 | { UNIT_DEPENDENCY_MOUNTINFO_DEFAULT, "mountinfo-default" }, | |
1106 | { UNIT_DEPENDENCY_PROC_SWAP, "proc-swap" }, | |
1107 | }; | |
1108 | size_t i; | |
1109 | ||
1110 | assert(f); | |
1111 | assert(kind); | |
1112 | assert(space); | |
1113 | ||
1114 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
1115 | ||
1116 | if (mask == 0) | |
1117 | break; | |
1118 | ||
d94a24ca | 1119 | if (FLAGS_SET(mask, table[i].mask)) { |
eef85c4a LP |
1120 | if (*space) |
1121 | fputc(' ', f); | |
1122 | else | |
1123 | *space = true; | |
1124 | ||
1125 | fputs(kind, f); | |
1126 | fputs("-", f); | |
1127 | fputs(table[i].name, f); | |
1128 | ||
1129 | mask &= ~table[i].mask; | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | assert(mask == 0); | |
1134 | } | |
1135 | ||
87f0e418 | 1136 | void unit_dump(Unit *u, FILE *f, const char *prefix) { |
49dbfa7b | 1137 | char *t, **j; |
87f0e418 LP |
1138 | UnitDependency d; |
1139 | Iterator i; | |
47be870b | 1140 | const char *prefix2; |
8d5e5931 | 1141 | char timestamp[5][FORMAT_TIMESTAMP_MAX], timespan[FORMAT_TIMESPAN_MAX]; |
a7f241db | 1142 | Unit *following; |
eeaedb7c | 1143 | _cleanup_set_free_ Set *following_set = NULL; |
05a98afd | 1144 | const char *n; |
02638280 LP |
1145 | CGroupMask m; |
1146 | int r; | |
87f0e418 LP |
1147 | |
1148 | assert(u); | |
ac155bb8 | 1149 | assert(u->type >= 0); |
87f0e418 | 1150 | |
4c940960 | 1151 | prefix = strempty(prefix); |
63c372cb | 1152 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
1153 | |
1154 | fprintf(f, | |
0121d1f2 ZJS |
1155 | "%s-> Unit %s:\n", |
1156 | prefix, u->id); | |
1157 | ||
1158 | SET_FOREACH(t, u->names, i) | |
1159 | if (!streq(t, u->id)) | |
1160 | fprintf(f, "%s\tAlias: %s\n", prefix, t); | |
1161 | ||
1162 | fprintf(f, | |
87f0e418 | 1163 | "%s\tDescription: %s\n" |
9e2f7c11 | 1164 | "%s\tInstance: %s\n" |
87f0e418 | 1165 | "%s\tUnit Load State: %s\n" |
2fad8195 | 1166 | "%s\tUnit Active State: %s\n" |
b895d155 | 1167 | "%s\tState Change Timestamp: %s\n" |
173e3821 | 1168 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 1169 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 1170 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 1171 | "%s\tInactive Enter Timestamp: %s\n" |
f2f725e5 | 1172 | "%s\tMay GC: %s\n" |
9444b1f2 | 1173 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 1174 | "%s\tTransient: %s\n" |
f5869324 | 1175 | "%s\tPerpetual: %s\n" |
5afe510c | 1176 | "%s\tGarbage Collection Mode: %s\n" |
4ad49000 LP |
1177 | "%s\tSlice: %s\n" |
1178 | "%s\tCGroup: %s\n" | |
aae7e17f | 1179 | "%s\tCGroup realized: %s\n", |
87f0e418 | 1180 | prefix, unit_description(u), |
ac155bb8 MS |
1181 | prefix, strna(u->instance), |
1182 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 1183 | prefix, unit_active_state_to_string(unit_active_state(u)), |
8d5e5931 ZJS |
1184 | prefix, strna(format_timestamp(timestamp[0], sizeof(timestamp[0]), u->state_change_timestamp.realtime)), |
1185 | prefix, strna(format_timestamp(timestamp[1], sizeof(timestamp[1]), u->inactive_exit_timestamp.realtime)), | |
1186 | prefix, strna(format_timestamp(timestamp[2], sizeof(timestamp[2]), u->active_enter_timestamp.realtime)), | |
1187 | prefix, strna(format_timestamp(timestamp[3], sizeof(timestamp[3]), u->active_exit_timestamp.realtime)), | |
1188 | prefix, strna(format_timestamp(timestamp[4], sizeof(timestamp[4]), u->inactive_enter_timestamp.realtime)), | |
f2f725e5 | 1189 | prefix, yes_no(unit_may_gc(u)), |
9444b1f2 | 1190 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 1191 | prefix, yes_no(u->transient), |
f5869324 | 1192 | prefix, yes_no(u->perpetual), |
5afe510c | 1193 | prefix, collect_mode_to_string(u->collect_mode), |
4ad49000 LP |
1194 | prefix, strna(unit_slice_name(u)), |
1195 | prefix, strna(u->cgroup_path), | |
aae7e17f FB |
1196 | prefix, yes_no(u->cgroup_realized)); |
1197 | ||
1198 | if (u->cgroup_realized_mask != 0) { | |
1199 | _cleanup_free_ char *s = NULL; | |
1200 | (void) cg_mask_to_string(u->cgroup_realized_mask, &s); | |
02638280 LP |
1201 | fprintf(f, "%s\tCGroup realized mask: %s\n", prefix, strnull(s)); |
1202 | } | |
0adf88b6 | 1203 | |
02638280 LP |
1204 | if (u->cgroup_enabled_mask != 0) { |
1205 | _cleanup_free_ char *s = NULL; | |
1206 | (void) cg_mask_to_string(u->cgroup_enabled_mask, &s); | |
1207 | fprintf(f, "%s\tCGroup enabled mask: %s\n", prefix, strnull(s)); | |
1208 | } | |
0adf88b6 | 1209 | |
02638280 LP |
1210 | m = unit_get_own_mask(u); |
1211 | if (m != 0) { | |
1212 | _cleanup_free_ char *s = NULL; | |
1213 | (void) cg_mask_to_string(m, &s); | |
1214 | fprintf(f, "%s\tCGroup own mask: %s\n", prefix, strnull(s)); | |
aae7e17f | 1215 | } |
0adf88b6 | 1216 | |
02638280 LP |
1217 | m = unit_get_members_mask(u); |
1218 | if (m != 0) { | |
aae7e17f | 1219 | _cleanup_free_ char *s = NULL; |
02638280 | 1220 | (void) cg_mask_to_string(m, &s); |
aae7e17f FB |
1221 | fprintf(f, "%s\tCGroup members mask: %s\n", prefix, strnull(s)); |
1222 | } | |
0301abf4 | 1223 | |
0adf88b6 LP |
1224 | m = unit_get_delegate_mask(u); |
1225 | if (m != 0) { | |
1226 | _cleanup_free_ char *s = NULL; | |
1227 | (void) cg_mask_to_string(m, &s); | |
1228 | fprintf(f, "%s\tCGroup delegate mask: %s\n", prefix, strnull(s)); | |
1229 | } | |
1230 | ||
4b58153d LP |
1231 | if (!sd_id128_is_null(u->invocation_id)) |
1232 | fprintf(f, "%s\tInvocation ID: " SD_ID128_FORMAT_STR "\n", | |
1233 | prefix, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
1234 | ||
49dbfa7b LP |
1235 | STRV_FOREACH(j, u->documentation) |
1236 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
1237 | ||
eeaedb7c LP |
1238 | following = unit_following(u); |
1239 | if (following) | |
ac155bb8 | 1240 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 1241 | |
eeaedb7c LP |
1242 | r = unit_following_set(u, &following_set); |
1243 | if (r >= 0) { | |
1244 | Unit *other; | |
1245 | ||
1246 | SET_FOREACH(other, following_set, i) | |
1247 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
1248 | } | |
1249 | ||
ac155bb8 MS |
1250 | if (u->fragment_path) |
1251 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 1252 | |
1b64d026 LP |
1253 | if (u->source_path) |
1254 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
1255 | ||
ae7a7182 | 1256 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 1257 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 1258 | |
e7dfbb4e LP |
1259 | if (u->failure_action != EMERGENCY_ACTION_NONE) |
1260 | fprintf(f, "%s\tFailure Action: %s\n", prefix, emergency_action_to_string(u->failure_action)); | |
7af67e9a LP |
1261 | if (u->failure_action_exit_status >= 0) |
1262 | fprintf(f, "%s\tFailure Action Exit Status: %i\n", prefix, u->failure_action_exit_status); | |
e7dfbb4e LP |
1263 | if (u->success_action != EMERGENCY_ACTION_NONE) |
1264 | fprintf(f, "%s\tSuccess Action: %s\n", prefix, emergency_action_to_string(u->success_action)); | |
7af67e9a LP |
1265 | if (u->success_action_exit_status >= 0) |
1266 | fprintf(f, "%s\tSuccess Action Exit Status: %i\n", prefix, u->success_action_exit_status); | |
e7dfbb4e | 1267 | |
36c16a7c | 1268 | if (u->job_timeout != USEC_INFINITY) |
2fa4092c | 1269 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 1270 | |
87a47f99 LN |
1271 | if (u->job_timeout_action != EMERGENCY_ACTION_NONE) |
1272 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, emergency_action_to_string(u->job_timeout_action)); | |
f189ab18 LP |
1273 | |
1274 | if (u->job_timeout_reboot_arg) | |
1275 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
1276 | ||
59fccdc5 LP |
1277 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
1278 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 1279 | |
ac155bb8 | 1280 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
1281 | fprintf(f, |
1282 | "%s\tCondition Timestamp: %s\n" | |
1283 | "%s\tCondition Result: %s\n", | |
8d5e5931 | 1284 | prefix, strna(format_timestamp(timestamp[0], sizeof(timestamp[0]), u->condition_timestamp.realtime)), |
ac155bb8 | 1285 | prefix, yes_no(u->condition_result)); |
2791a8f8 | 1286 | |
59fccdc5 LP |
1287 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
1288 | fprintf(f, | |
1289 | "%s\tAssert Timestamp: %s\n" | |
1290 | "%s\tAssert Result: %s\n", | |
8d5e5931 | 1291 | prefix, strna(format_timestamp(timestamp[0], sizeof(timestamp[0]), u->assert_timestamp.realtime)), |
59fccdc5 LP |
1292 | prefix, yes_no(u->assert_result)); |
1293 | ||
87f0e418 | 1294 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
eef85c4a | 1295 | UnitDependencyInfo di; |
87f0e418 LP |
1296 | Unit *other; |
1297 | ||
eef85c4a LP |
1298 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { |
1299 | bool space = false; | |
1300 | ||
1301 | fprintf(f, "%s\t%s: %s (", prefix, unit_dependency_to_string(d), other->id); | |
1302 | ||
1303 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); | |
1304 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1305 | ||
1306 | fputs(")\n", f); | |
1307 | } | |
87f0e418 LP |
1308 | } |
1309 | ||
eef85c4a LP |
1310 | if (!hashmap_isempty(u->requires_mounts_for)) { |
1311 | UnitDependencyInfo di; | |
1312 | const char *path; | |
1313 | ||
1314 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { | |
1315 | bool space = false; | |
7c8fa05c | 1316 | |
eef85c4a | 1317 | fprintf(f, "%s\tRequiresMountsFor: %s (", prefix, path); |
7c8fa05c | 1318 | |
eef85c4a LP |
1319 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); |
1320 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1321 | ||
1322 | fputs(")\n", f); | |
1323 | } | |
7c8fa05c LP |
1324 | } |
1325 | ||
ac155bb8 | 1326 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 1327 | |
b0650475 | 1328 | fprintf(f, |
a40eb732 | 1329 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
1330 | "%s\tRefuseManualStart: %s\n" |
1331 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 1332 | "%s\tDefaultDependencies: %s\n" |
d420282b | 1333 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1334 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1335 | prefix, yes_no(u->stop_when_unneeded), |
1336 | prefix, yes_no(u->refuse_manual_start), | |
1337 | prefix, yes_no(u->refuse_manual_stop), | |
1338 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1339 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1340 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 1341 | |
23a177ef LP |
1342 | if (UNIT_VTABLE(u)->dump) |
1343 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1344 | |
ac155bb8 | 1345 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1346 | fprintf(f, |
1347 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1348 | prefix, u->merged_into->id); |
1349 | else if (u->load_state == UNIT_ERROR) | |
4bbccb02 | 1350 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror_safe(u->load_error)); |
8821a00f | 1351 | |
05a98afd LP |
1352 | for (n = sd_bus_track_first(u->bus_track); n; n = sd_bus_track_next(u->bus_track)) |
1353 | fprintf(f, "%s\tBus Ref: %s\n", prefix, n); | |
87f0e418 | 1354 | |
ac155bb8 MS |
1355 | if (u->job) |
1356 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1357 | |
e0209d83 MS |
1358 | if (u->nop_job) |
1359 | job_dump(u->nop_job, f, prefix2); | |
87f0e418 LP |
1360 | } |
1361 | ||
1362 | /* Common implementation for multiple backends */ | |
e537352b | 1363 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1364 | int r; |
1365 | ||
1366 | assert(u); | |
23a177ef | 1367 | |
e48614c4 | 1368 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1369 | r = unit_load_fragment(u); |
1370 | if (r < 0) | |
23a177ef LP |
1371 | return r; |
1372 | ||
ac155bb8 | 1373 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1374 | return -ENOENT; |
1375 | ||
9e4ea9cc ZJS |
1376 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1377 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1378 | * been loaded and which not, at least without doing complicated book-keeping, | |
1379 | * so let's always reread all drop-ins. */ | |
1380 | return unit_load_dropin(unit_follow_merge(u)); | |
23a177ef LP |
1381 | } |
1382 | ||
1383 | /* Common implementation for multiple backends */ | |
e537352b | 1384 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1385 | int r; |
87f0e418 LP |
1386 | |
1387 | assert(u); | |
1388 | ||
23a177ef LP |
1389 | /* Same as unit_load_fragment_and_dropin(), but whether |
1390 | * something can be loaded or not doesn't matter. */ | |
1391 | ||
e9e8cbc8 | 1392 | /* Load a .service/.socket/.slice/… file */ |
4ad49000 LP |
1393 | r = unit_load_fragment(u); |
1394 | if (r < 0) | |
87f0e418 LP |
1395 | return r; |
1396 | ||
ac155bb8 MS |
1397 | if (u->load_state == UNIT_STUB) |
1398 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1399 | |
9e4ea9cc ZJS |
1400 | /* Load drop-in directory data */ |
1401 | return unit_load_dropin(unit_follow_merge(u)); | |
87f0e418 LP |
1402 | } |
1403 | ||
19496554 MS |
1404 | void unit_add_to_target_deps_queue(Unit *u) { |
1405 | Manager *m = u->manager; | |
1406 | ||
1407 | assert(u); | |
1408 | ||
1409 | if (u->in_target_deps_queue) | |
1410 | return; | |
1411 | ||
1412 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1413 | u->in_target_deps_queue = true; | |
1414 | } | |
1415 | ||
bba34eed | 1416 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1417 | assert(u); |
1418 | assert(target); | |
1419 | ||
ac155bb8 | 1420 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1421 | return 0; |
1422 | ||
35b8ca3a | 1423 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1424 | * that loop check below is reliable */ |
ac155bb8 MS |
1425 | if (u->load_state != UNIT_LOADED || |
1426 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1427 | return 0; |
1428 | ||
21256a2b LP |
1429 | /* If either side wants no automatic dependencies, then let's |
1430 | * skip this */ | |
ac155bb8 MS |
1431 | if (!u->default_dependencies || |
1432 | !target->default_dependencies) | |
21256a2b LP |
1433 | return 0; |
1434 | ||
98bc2000 | 1435 | /* Don't create loops */ |
eef85c4a | 1436 | if (hashmap_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1437 | return 0; |
1438 | ||
eef85c4a | 1439 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1440 | } |
1441 | ||
e954c9cf | 1442 | static int unit_add_slice_dependencies(Unit *u) { |
eef85c4a | 1443 | UnitDependencyMask mask; |
e954c9cf | 1444 | assert(u); |
b81884e7 | 1445 | |
35b7ff80 | 1446 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1447 | return 0; |
1448 | ||
eef85c4a LP |
1449 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1450 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1451 | relationship). */ | |
1452 | mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; | |
1453 | ||
e954c9cf | 1454 | if (UNIT_ISSET(u->slice)) |
eef85c4a | 1455 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true, mask); |
e954c9cf | 1456 | |
8c8da0e0 | 1457 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1458 | return 0; |
1459 | ||
5a724170 | 1460 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, true, mask); |
98bc2000 LP |
1461 | } |
1462 | ||
e954c9cf | 1463 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1464 | UnitDependencyInfo di; |
1465 | const char *path; | |
1466 | Iterator i; | |
9588bc32 LP |
1467 | int r; |
1468 | ||
1469 | assert(u); | |
1470 | ||
eef85c4a LP |
1471 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { |
1472 | char prefix[strlen(path) + 1]; | |
9588bc32 | 1473 | |
eef85c4a | 1474 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1475 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1476 | Unit *m; |
1477 | ||
c7c89abb | 1478 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1479 | if (r < 0) |
1480 | return r; | |
c7c89abb FB |
1481 | |
1482 | m = manager_get_unit(u->manager, p); | |
1483 | if (!m) { | |
1484 | /* Make sure to load the mount unit if | |
1485 | * it exists. If so the dependencies | |
1486 | * on this unit will be added later | |
1487 | * during the loading of the mount | |
1488 | * unit. */ | |
1489 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1490 | continue; |
c7c89abb | 1491 | } |
9588bc32 LP |
1492 | if (m == u) |
1493 | continue; | |
1494 | ||
1495 | if (m->load_state != UNIT_LOADED) | |
1496 | continue; | |
1497 | ||
eef85c4a | 1498 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1499 | if (r < 0) |
1500 | return r; | |
1501 | ||
1502 | if (m->fragment_path) { | |
eef85c4a | 1503 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1504 | if (r < 0) |
1505 | return r; | |
1506 | } | |
1507 | } | |
1508 | } | |
1509 | ||
1510 | return 0; | |
1511 | } | |
1512 | ||
95ae05c0 WC |
1513 | static int unit_add_startup_units(Unit *u) { |
1514 | CGroupContext *c; | |
5269eb6b | 1515 | int r; |
95ae05c0 WC |
1516 | |
1517 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1518 | if (!c) |
1519 | return 0; | |
1520 | ||
d53d9474 | 1521 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1522 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1523 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1524 | return 0; |
1525 | ||
5269eb6b LP |
1526 | r = set_ensure_allocated(&u->manager->startup_units, NULL); |
1527 | if (r < 0) | |
1528 | return r; | |
1529 | ||
756c09e6 | 1530 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1531 | } |
1532 | ||
87f0e418 LP |
1533 | int unit_load(Unit *u) { |
1534 | int r; | |
1535 | ||
1536 | assert(u); | |
1537 | ||
ac155bb8 | 1538 | if (u->in_load_queue) { |
71fda00f | 1539 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1540 | u->in_load_queue = false; |
87f0e418 LP |
1541 | } |
1542 | ||
ac155bb8 | 1543 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1544 | return -EINVAL; |
1545 | ||
ac155bb8 | 1546 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1547 | return 0; |
1548 | ||
4f4afc88 | 1549 | if (u->transient_file) { |
66fa4bdd LP |
1550 | /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup |
1551 | * is complete, hence let's synchronize the unit file we just wrote to disk. */ | |
1552 | ||
4f4afc88 LP |
1553 | r = fflush_and_check(u->transient_file); |
1554 | if (r < 0) | |
1555 | goto fail; | |
1556 | ||
50fb00b7 | 1557 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1558 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1559 | } |
1560 | ||
c2756a68 LP |
1561 | if (UNIT_VTABLE(u)->load) { |
1562 | r = UNIT_VTABLE(u)->load(u); | |
1563 | if (r < 0) | |
87f0e418 | 1564 | goto fail; |
c2756a68 | 1565 | } |
23a177ef | 1566 | |
ac155bb8 | 1567 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1568 | r = -ENOENT; |
1569 | goto fail; | |
1570 | } | |
1571 | ||
7c8fa05c | 1572 | if (u->load_state == UNIT_LOADED) { |
19496554 | 1573 | unit_add_to_target_deps_queue(u); |
e954c9cf LP |
1574 | |
1575 | r = unit_add_slice_dependencies(u); | |
1576 | if (r < 0) | |
1577 | goto fail; | |
c2756a68 | 1578 | |
e954c9cf | 1579 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1580 | if (r < 0) |
c2756a68 | 1581 | goto fail; |
7c8fa05c | 1582 | |
95ae05c0 WC |
1583 | r = unit_add_startup_units(u); |
1584 | if (r < 0) | |
1585 | goto fail; | |
1586 | ||
eef85c4a | 1587 | if (u->on_failure_job_mode == JOB_ISOLATE && hashmap_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1588 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
6f40aa45 | 1589 | r = -ENOEXEC; |
c2756a68 LP |
1590 | goto fail; |
1591 | } | |
bc432dc7 | 1592 | |
a2df3ea4 MK |
1593 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1594 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1595 | ||
5af88058 LP |
1596 | /* We finished loading, let's ensure our parents recalculate the members mask */ |
1597 | unit_invalidate_cgroup_members_masks(u); | |
f68319bb LP |
1598 | } |
1599 | ||
ac155bb8 | 1600 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1601 | |
1602 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1603 | unit_add_to_gc_queue(u); |
87f0e418 | 1604 | |
87f0e418 LP |
1605 | return 0; |
1606 | ||
1607 | fail: | |
c4555ad8 LP |
1608 | /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code should hence |
1609 | * return ENOEXEC to ensure units are placed in this state after loading */ | |
1610 | ||
1611 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : | |
1612 | r == -ENOEXEC ? UNIT_BAD_SETTING : | |
1613 | UNIT_ERROR; | |
ac155bb8 | 1614 | u->load_error = r; |
c4555ad8 | 1615 | |
c1e1601e | 1616 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1617 | unit_add_to_gc_queue(u); |
23a177ef | 1618 | |
c4555ad8 | 1619 | return log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
87f0e418 LP |
1620 | } |
1621 | ||
f9f88198 YW |
1622 | _printf_(7, 8) |
1623 | static int log_unit_internal(void *userdata, int level, int error, const char *file, int line, const char *func, const char *format, ...) { | |
1624 | Unit *u = userdata; | |
1625 | va_list ap; | |
1626 | int r; | |
49365733 | 1627 | |
f9f88198 YW |
1628 | va_start(ap, format); |
1629 | if (u) | |
1630 | r = log_object_internalv(level, error, file, line, func, | |
1631 | u->manager->unit_log_field, | |
1632 | u->id, | |
1633 | u->manager->invocation_log_field, | |
1634 | u->invocation_id_string, | |
1635 | format, ap); | |
1636 | else | |
1637 | r = log_internalv(level, error, file, line, func, format, ap); | |
1638 | va_end(ap); | |
49365733 | 1639 | |
f9f88198 | 1640 | return r; |
49365733 LP |
1641 | } |
1642 | ||
97a3f4ee | 1643 | static bool unit_test_condition(Unit *u) { |
90bbc946 LP |
1644 | assert(u); |
1645 | ||
ac155bb8 | 1646 | dual_timestamp_get(&u->condition_timestamp); |
f9f88198 | 1647 | u->condition_result = condition_test_list(u->conditions, condition_type_to_string, log_unit_internal, u); |
90bbc946 | 1648 | |
e18f8852 LP |
1649 | unit_add_to_dbus_queue(u); |
1650 | ||
ac155bb8 | 1651 | return u->condition_result; |
90bbc946 LP |
1652 | } |
1653 | ||
97a3f4ee | 1654 | static bool unit_test_assert(Unit *u) { |
59fccdc5 LP |
1655 | assert(u); |
1656 | ||
1657 | dual_timestamp_get(&u->assert_timestamp); | |
f9f88198 | 1658 | u->assert_result = condition_test_list(u->asserts, assert_type_to_string, log_unit_internal, u); |
59fccdc5 | 1659 | |
e18f8852 LP |
1660 | unit_add_to_dbus_queue(u); |
1661 | ||
59fccdc5 LP |
1662 | return u->assert_result; |
1663 | } | |
1664 | ||
df446f96 | 1665 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
5b262f74 LP |
1666 | const char *d; |
1667 | ||
2a8f53c6 | 1668 | d = unit_status_string(u); |
5b262f74 LP |
1669 | if (log_get_show_color()) |
1670 | d = strjoina(ANSI_HIGHLIGHT, d, ANSI_NORMAL); | |
1671 | ||
df446f96 | 1672 | DISABLE_WARNING_FORMAT_NONLITERAL; |
5b262f74 | 1673 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, status, unit_status_msg_format, d); |
df446f96 LP |
1674 | REENABLE_WARNING; |
1675 | } | |
1676 | ||
97a3f4ee | 1677 | int unit_test_start_limit(Unit *u) { |
429926e9 TR |
1678 | const char *reason; |
1679 | ||
6bf0f408 LP |
1680 | assert(u); |
1681 | ||
7bf081a1 | 1682 | if (ratelimit_below(&u->start_ratelimit)) { |
6bf0f408 LP |
1683 | u->start_limit_hit = false; |
1684 | return 0; | |
1685 | } | |
1686 | ||
1687 | log_unit_warning(u, "Start request repeated too quickly."); | |
1688 | u->start_limit_hit = true; | |
1689 | ||
429926e9 TR |
1690 | reason = strjoina("unit ", u->id, " failed"); |
1691 | ||
36c4dc08 LP |
1692 | emergency_action(u->manager, u->start_limit_action, |
1693 | EMERGENCY_ACTION_IS_WATCHDOG|EMERGENCY_ACTION_WARN, | |
1694 | u->reboot_arg, -1, reason); | |
1695 | ||
1696 | return -ECANCELED; | |
6bf0f408 LP |
1697 | } |
1698 | ||
c891efaf | 1699 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1700 | assert(u); |
c891efaf FB |
1701 | |
1702 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1703 | return false; | |
1704 | ||
1705 | /* For some reasons units remaining in the same process group | |
1706 | * as PID 1 fail to acquire the console even if it's not used | |
1707 | * by any process. So skip the confirmation question for them. */ | |
1708 | return !unit_get_exec_context(u)->same_pgrp; | |
1709 | } | |
1710 | ||
631b676b LP |
1711 | static bool unit_verify_deps(Unit *u) { |
1712 | Unit *other; | |
1713 | Iterator j; | |
eef85c4a | 1714 | void *v; |
631b676b LP |
1715 | |
1716 | assert(u); | |
1717 | ||
1718 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with | |
1719 | * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job | |
1720 | * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in | |
1721 | * conjunction with After= as for them any such check would make things entirely racy. */ | |
1722 | ||
eef85c4a | 1723 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], j) { |
631b676b | 1724 | |
eef85c4a | 1725 | if (!hashmap_contains(u->dependencies[UNIT_AFTER], other)) |
631b676b LP |
1726 | continue; |
1727 | ||
1728 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1729 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1730 | return false; | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | return true; | |
1735 | } | |
1736 | ||
9adb6959 | 1737 | /* Errors that aren't really errors: |
6bf0f408 | 1738 | * -EALREADY: Unit is already started. |
9adb6959 | 1739 | * -ECOMM: Condition failed |
6bf0f408 | 1740 | * -EAGAIN: An operation is already in progress. Retry later. |
9adb6959 LP |
1741 | * |
1742 | * Errors that are real errors: | |
1743 | * -EBADR: This unit type does not support starting. | |
2de9b979 | 1744 | * -ECANCELED: Start limit hit, too many requests for now |
6bf0f408 LP |
1745 | * -EPROTO: Assert failed |
1746 | * -EINVAL: Unit not loaded | |
1747 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1748 | * -ENOLINK: The necessary dependencies are not fulfilled. |
d4fd1cf2 | 1749 | * -ESTALE: This unit has been started before and can't be started a second time |
a4191c9f | 1750 | * -ENOENT: This is a triggering unit and unit to trigger is not loaded |
87f0e418 LP |
1751 | */ |
1752 | int unit_start(Unit *u) { | |
1753 | UnitActiveState state; | |
92ab323c | 1754 | Unit *following; |
87f0e418 LP |
1755 | |
1756 | assert(u); | |
1757 | ||
5766aca8 LP |
1758 | /* If this is already started, then this will succeed. Note that this will even succeed if this unit |
1759 | * is not startable by the user. This is relied on to detect when we need to wait for units and when | |
1760 | * waiting is finished. */ | |
87f0e418 LP |
1761 | state = unit_active_state(u); |
1762 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1763 | return -EALREADY; | |
380dc8b0 LP |
1764 | if (state == UNIT_MAINTENANCE) |
1765 | return -EAGAIN; | |
87f0e418 | 1766 | |
6bf0f408 LP |
1767 | /* Units that aren't loaded cannot be started */ |
1768 | if (u->load_state != UNIT_LOADED) | |
1769 | return -EINVAL; | |
1770 | ||
d4fd1cf2 LP |
1771 | /* Refuse starting scope units more than once */ |
1772 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1773 | return -ESTALE; | |
1774 | ||
5766aca8 LP |
1775 | /* If the conditions failed, don't do anything at all. If we already are activating this call might |
1776 | * still be useful to speed up activation in case there is some hold-off time, but we don't want to | |
1777 | * recheck the condition in that case. */ | |
a82e5507 | 1778 | if (state != UNIT_ACTIVATING && |
5af6aa58 | 1779 | !unit_test_condition(u)) |
5766aca8 | 1780 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(ECOMM), "Starting requested but condition failed. Not starting unit."); |
52661efd | 1781 | |
59fccdc5 LP |
1782 | /* If the asserts failed, fail the entire job */ |
1783 | if (state != UNIT_ACTIVATING && | |
5766aca8 LP |
1784 | !unit_test_assert(u)) |
1785 | return log_unit_notice_errno(u, SYNTHETIC_ERRNO(EPROTO), "Starting requested but asserts failed."); | |
59fccdc5 | 1786 | |
5766aca8 LP |
1787 | /* Units of types that aren't supported cannot be started. Note that we do this test only after the |
1788 | * condition checks, so that we rather return condition check errors (which are usually not | |
1789 | * considered a true failure) than "not supported" errors (which are considered a failure). | |
d11a7645 | 1790 | */ |
96cf3ec9 | 1791 | if (!unit_type_supported(u->type)) |
d11a7645 LP |
1792 | return -EOPNOTSUPP; |
1793 | ||
5766aca8 LP |
1794 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine |
1795 | * should have taken care of this already, but let's check this here again. After all, our | |
1796 | * dependencies might not be in effect anymore, due to a reload or due to a failed condition. */ | |
631b676b LP |
1797 | if (!unit_verify_deps(u)) |
1798 | return -ENOLINK; | |
1799 | ||
92ab323c | 1800 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1801 | following = unit_following(u); |
1802 | if (following) { | |
f2341e0a | 1803 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1804 | return unit_start(following); |
1805 | } | |
1806 | ||
1807 | /* If it is stopped, but we cannot start it, then fail */ | |
1808 | if (!UNIT_VTABLE(u)->start) | |
1809 | return -EBADR; | |
1810 | ||
5766aca8 LP |
1811 | /* We don't suppress calls to ->start() here when we are already starting, to allow this request to |
1812 | * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it | |
1813 | * waits for a holdoff timer to elapse before it will start again. */ | |
87f0e418 | 1814 | |
c1e1601e | 1815 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1816 | |
d1a34ae9 | 1817 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1818 | } |
1819 | ||
1820 | bool unit_can_start(Unit *u) { | |
1821 | assert(u); | |
1822 | ||
8ff4d2ab LP |
1823 | if (u->load_state != UNIT_LOADED) |
1824 | return false; | |
1825 | ||
96cf3ec9 | 1826 | if (!unit_type_supported(u->type)) |
8ff4d2ab LP |
1827 | return false; |
1828 | ||
d4fd1cf2 LP |
1829 | /* Scope units may be started only once */ |
1830 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
1831 | return false; | |
1832 | ||
87f0e418 LP |
1833 | return !!UNIT_VTABLE(u)->start; |
1834 | } | |
1835 | ||
2528a7a6 LP |
1836 | bool unit_can_isolate(Unit *u) { |
1837 | assert(u); | |
1838 | ||
1839 | return unit_can_start(u) && | |
ac155bb8 | 1840 | u->allow_isolate; |
2528a7a6 LP |
1841 | } |
1842 | ||
87f0e418 LP |
1843 | /* Errors: |
1844 | * -EBADR: This unit type does not support stopping. | |
1845 | * -EALREADY: Unit is already stopped. | |
1846 | * -EAGAIN: An operation is already in progress. Retry later. | |
1847 | */ | |
1848 | int unit_stop(Unit *u) { | |
1849 | UnitActiveState state; | |
92ab323c | 1850 | Unit *following; |
87f0e418 LP |
1851 | |
1852 | assert(u); | |
1853 | ||
87f0e418 | 1854 | state = unit_active_state(u); |
fdf20a31 | 1855 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1856 | return -EALREADY; |
1857 | ||
0faacd47 LP |
1858 | following = unit_following(u); |
1859 | if (following) { | |
f2341e0a | 1860 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1861 | return unit_stop(following); |
1862 | } | |
1863 | ||
7898b0cf LP |
1864 | if (!UNIT_VTABLE(u)->stop) |
1865 | return -EBADR; | |
1866 | ||
c1e1601e | 1867 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1868 | |
d1a34ae9 | 1869 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1870 | } |
1871 | ||
f5869324 LP |
1872 | bool unit_can_stop(Unit *u) { |
1873 | assert(u); | |
1874 | ||
96cf3ec9 | 1875 | if (!unit_type_supported(u->type)) |
f5869324 LP |
1876 | return false; |
1877 | ||
1878 | if (u->perpetual) | |
1879 | return false; | |
1880 | ||
1881 | return !!UNIT_VTABLE(u)->stop; | |
1882 | } | |
1883 | ||
87f0e418 LP |
1884 | /* Errors: |
1885 | * -EBADR: This unit type does not support reloading. | |
1886 | * -ENOEXEC: Unit is not started. | |
1887 | * -EAGAIN: An operation is already in progress. Retry later. | |
1888 | */ | |
1889 | int unit_reload(Unit *u) { | |
1890 | UnitActiveState state; | |
92ab323c | 1891 | Unit *following; |
87f0e418 LP |
1892 | |
1893 | assert(u); | |
1894 | ||
ac155bb8 | 1895 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1896 | return -EINVAL; |
1897 | ||
87f0e418 LP |
1898 | if (!unit_can_reload(u)) |
1899 | return -EBADR; | |
1900 | ||
1901 | state = unit_active_state(u); | |
e364ad06 | 1902 | if (state == UNIT_RELOADING) |
6255af75 | 1903 | return -EAGAIN; |
87f0e418 | 1904 | |
6a371e23 | 1905 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1906 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1907 | return -ENOEXEC; |
6a371e23 | 1908 | } |
87f0e418 | 1909 | |
e48614c4 ZJS |
1910 | following = unit_following(u); |
1911 | if (following) { | |
f2341e0a | 1912 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1913 | return unit_reload(following); |
1914 | } | |
1915 | ||
c1e1601e | 1916 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1917 | |
f54bcca5 JR |
1918 | if (!UNIT_VTABLE(u)->reload) { |
1919 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
2ad2e41a | 1920 | unit_notify(u, unit_active_state(u), unit_active_state(u), 0); |
f54bcca5 JR |
1921 | return 0; |
1922 | } | |
1923 | ||
d1a34ae9 | 1924 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1925 | } |
1926 | ||
1927 | bool unit_can_reload(Unit *u) { | |
1928 | assert(u); | |
1929 | ||
f54bcca5 JR |
1930 | if (UNIT_VTABLE(u)->can_reload) |
1931 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 1932 | |
eef85c4a | 1933 | if (!hashmap_isempty(u->dependencies[UNIT_PROPAGATES_RELOAD_TO])) |
87f0e418 LP |
1934 | return true; |
1935 | ||
f54bcca5 | 1936 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
1937 | } |
1938 | ||
a3c1168a LP |
1939 | bool unit_is_unneeded(Unit *u) { |
1940 | static const UnitDependency deps[] = { | |
be7d9ff7 | 1941 | UNIT_REQUIRED_BY, |
084918ba | 1942 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1943 | UNIT_WANTED_BY, |
1944 | UNIT_BOUND_BY, | |
1945 | }; | |
a3c1168a | 1946 | size_t j; |
f3bff0eb LP |
1947 | |
1948 | assert(u); | |
1949 | ||
ac155bb8 | 1950 | if (!u->stop_when_unneeded) |
a3c1168a | 1951 | return false; |
f3bff0eb | 1952 | |
a3c1168a LP |
1953 | /* Don't clean up while the unit is transitioning or is even inactive. */ |
1954 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
1955 | return false; | |
1956 | if (u->job) | |
1957 | return false; | |
f3bff0eb | 1958 | |
a3c1168a | 1959 | for (j = 0; j < ELEMENTSOF(deps); j++) { |
eef85c4a LP |
1960 | Unit *other; |
1961 | Iterator i; | |
1962 | void *v; | |
1963 | ||
fda09318 | 1964 | /* If a dependent unit has a job queued, is active or transitioning, or is marked for |
a3c1168a | 1965 | * restart, then don't clean this one up. */ |
b81884e7 | 1966 | |
a3c1168a | 1967 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[deps[j]], i) { |
93d4cb09 | 1968 | if (other->job) |
a3c1168a LP |
1969 | return false; |
1970 | ||
1971 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1972 | return false; | |
1973 | ||
1974 | if (unit_will_restart(other)) | |
1975 | return false; | |
1976 | } | |
bea355da LP |
1977 | } |
1978 | ||
a3c1168a LP |
1979 | return true; |
1980 | } | |
f3bff0eb | 1981 | |
a3c1168a LP |
1982 | static void check_unneeded_dependencies(Unit *u) { |
1983 | ||
1984 | static const UnitDependency deps[] = { | |
1985 | UNIT_REQUIRES, | |
1986 | UNIT_REQUISITE, | |
1987 | UNIT_WANTS, | |
1988 | UNIT_BINDS_TO, | |
1989 | }; | |
1990 | size_t j; | |
1991 | ||
1992 | assert(u); | |
1993 | ||
1994 | /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */ | |
1995 | ||
1996 | for (j = 0; j < ELEMENTSOF(deps); j++) { | |
1997 | Unit *other; | |
1998 | Iterator i; | |
1999 | void *v; | |
2000 | ||
2001 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[deps[j]], i) | |
fda09318 | 2002 | unit_submit_to_stop_when_unneeded_queue(other); |
a3c1168a | 2003 | } |
f3bff0eb LP |
2004 | } |
2005 | ||
ff502445 | 2006 | static void unit_check_binds_to(Unit *u) { |
4afd3348 | 2007 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
ff502445 LP |
2008 | bool stop = false; |
2009 | Unit *other; | |
2010 | Iterator i; | |
eef85c4a | 2011 | void *v; |
67bfdc97 | 2012 | int r; |
ff502445 LP |
2013 | |
2014 | assert(u); | |
2015 | ||
2016 | if (u->job) | |
2017 | return; | |
2018 | ||
2019 | if (unit_active_state(u) != UNIT_ACTIVE) | |
2020 | return; | |
2021 | ||
eef85c4a | 2022 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) { |
ff502445 LP |
2023 | if (other->job) |
2024 | continue; | |
13ddc3fc ZJS |
2025 | |
2026 | if (!other->coldplugged) | |
2027 | /* We might yet create a job for the other unit… */ | |
2028 | continue; | |
ff502445 LP |
2029 | |
2030 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
2031 | continue; | |
2032 | ||
2033 | stop = true; | |
98f738b6 | 2034 | break; |
ff502445 LP |
2035 | } |
2036 | ||
2037 | if (!stop) | |
2038 | return; | |
2039 | ||
595bfe7d | 2040 | /* If stopping a unit fails continuously we might enter a stop |
67bfdc97 LP |
2041 | * loop here, hence stop acting on the service being |
2042 | * unnecessary after a while. */ | |
7994ac1d | 2043 | if (!ratelimit_below(&u->auto_stop_ratelimit)) { |
67bfdc97 LP |
2044 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); |
2045 | return; | |
2046 | } | |
2047 | ||
98f738b6 | 2048 | assert(other); |
f2341e0a | 2049 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
2050 | |
2051 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
50cbaba4 | 2052 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, NULL, &error, NULL); |
67bfdc97 | 2053 | if (r < 0) |
4bd29fe5 | 2054 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
ff502445 LP |
2055 | } |
2056 | ||
87f0e418 LP |
2057 | static void retroactively_start_dependencies(Unit *u) { |
2058 | Iterator i; | |
2059 | Unit *other; | |
eef85c4a | 2060 | void *v; |
87f0e418 LP |
2061 | |
2062 | assert(u); | |
2063 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2064 | ||
eef85c4a LP |
2065 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUIRES], i) |
2066 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2067 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2068 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
b81884e7 | 2069 | |
eef85c4a LP |
2070 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) |
2071 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2072 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2073 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
87f0e418 | 2074 | |
eef85c4a LP |
2075 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_WANTS], i) |
2076 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2077 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2078 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL, NULL); |
87f0e418 | 2079 | |
eef85c4a | 2080 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 2081 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2082 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
69dd2852 | 2083 | |
eef85c4a | 2084 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 2085 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2086 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
87f0e418 LP |
2087 | } |
2088 | ||
2089 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 | 2090 | Unit *other; |
eef85c4a LP |
2091 | Iterator i; |
2092 | void *v; | |
87f0e418 LP |
2093 | |
2094 | assert(u); | |
2095 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2096 | ||
b81884e7 | 2097 | /* Pull down units which are bound to us recursively if enabled */ |
eef85c4a | 2098 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 2099 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2100 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
cd0504d0 MS |
2101 | } |
2102 | ||
3ecaa09b | 2103 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
2104 | Unit *other; |
2105 | Iterator i; | |
eef85c4a | 2106 | void *v; |
7f66b026 | 2107 | int r; |
c0daa706 LP |
2108 | |
2109 | assert(u); | |
2110 | ||
eef85c4a | 2111 | if (hashmap_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
2112 | return; |
2113 | ||
f2341e0a | 2114 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 2115 | |
eef85c4a | 2116 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_ON_FAILURE], i) { |
7f66b026 | 2117 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
222ae6a8 | 2118 | |
50cbaba4 | 2119 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, NULL, &error, NULL); |
c1b6628d | 2120 | if (r < 0) |
7f66b026 | 2121 | log_unit_warning_errno(u, r, "Failed to enqueue OnFailure= job, ignoring: %s", bus_error_message(&error, r)); |
222ae6a8 | 2122 | } |
c0daa706 LP |
2123 | } |
2124 | ||
3ecaa09b LP |
2125 | void unit_trigger_notify(Unit *u) { |
2126 | Unit *other; | |
2127 | Iterator i; | |
eef85c4a | 2128 | void *v; |
3ecaa09b LP |
2129 | |
2130 | assert(u); | |
2131 | ||
eef85c4a | 2132 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_TRIGGERED_BY], i) |
3ecaa09b LP |
2133 | if (UNIT_VTABLE(other)->trigger_notify) |
2134 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2135 | } | |
2136 | ||
37109b85 ZJS |
2137 | static int raise_level(int log_level, bool condition_info, bool condition_notice) { |
2138 | if (condition_notice && log_level > LOG_NOTICE) | |
2139 | return LOG_NOTICE; | |
2140 | if (condition_info && log_level > LOG_INFO) | |
2141 | return LOG_INFO; | |
2142 | return log_level; | |
2143 | } | |
2144 | ||
915b1d01 | 2145 | static int unit_log_resources(Unit *u) { |
bc40a20e LP |
2146 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + _CGROUP_IO_ACCOUNTING_METRIC_MAX + 4]; |
2147 | bool any_traffic = false, have_ip_accounting = false, any_io = false, have_io_accounting = false; | |
2148 | _cleanup_free_ char *igress = NULL, *egress = NULL, *rr = NULL, *wr = NULL; | |
37109b85 | 2149 | int log_level = LOG_DEBUG; /* May be raised if resources consumed over a treshold */ |
915b1d01 | 2150 | size_t n_message_parts = 0, n_iovec = 0; |
bc40a20e | 2151 | char* message_parts[1 + 2 + 2 + 1], *t; |
915b1d01 LP |
2152 | nsec_t nsec = NSEC_INFINITY; |
2153 | CGroupIPAccountingMetric m; | |
2154 | size_t i; | |
2155 | int r; | |
2156 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2157 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2158 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2159 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2160 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2161 | }; | |
bc40a20e LP |
2162 | const char* const io_fields[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
2163 | [CGROUP_IO_READ_BYTES] = "IO_METRIC_READ_BYTES", | |
2164 | [CGROUP_IO_WRITE_BYTES] = "IO_METRIC_WRITE_BYTES", | |
2165 | [CGROUP_IO_READ_OPERATIONS] = "IO_METRIC_READ_OPERATIONS", | |
2166 | [CGROUP_IO_WRITE_OPERATIONS] = "IO_METRIC_WRITE_OPERATIONS", | |
2167 | }; | |
915b1d01 LP |
2168 | |
2169 | assert(u); | |
2170 | ||
2171 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2172 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2173 | * information and the complete data in structured fields. */ | |
2174 | ||
2175 | (void) unit_get_cpu_usage(u, &nsec); | |
2176 | if (nsec != NSEC_INFINITY) { | |
2177 | char buf[FORMAT_TIMESPAN_MAX] = ""; | |
2178 | ||
2179 | /* Format the CPU time for inclusion in the structured log message */ | |
2180 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2181 | r = log_oom(); | |
2182 | goto finish; | |
2183 | } | |
2184 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2185 | ||
2186 | /* Format the CPU time for inclusion in the human language message string */ | |
2187 | format_timespan(buf, sizeof(buf), nsec / NSEC_PER_USEC, USEC_PER_MSEC); | |
ec9d636b | 2188 | t = strjoin("consumed ", buf, " CPU time"); |
915b1d01 LP |
2189 | if (!t) { |
2190 | r = log_oom(); | |
2191 | goto finish; | |
2192 | } | |
2193 | ||
2194 | message_parts[n_message_parts++] = t; | |
37109b85 ZJS |
2195 | |
2196 | log_level = raise_level(log_level, | |
2197 | nsec > NOTICEWORTHY_CPU_NSEC, | |
2198 | nsec > MENTIONWORTHY_CPU_NSEC); | |
915b1d01 LP |
2199 | } |
2200 | ||
bc40a20e LP |
2201 | for (CGroupIOAccountingMetric k = 0; k < _CGROUP_IO_ACCOUNTING_METRIC_MAX; k++) { |
2202 | char buf[FORMAT_BYTES_MAX] = ""; | |
2203 | uint64_t value = UINT64_MAX; | |
2204 | ||
2205 | assert(io_fields[k]); | |
2206 | ||
2207 | (void) unit_get_io_accounting(u, k, k > 0, &value); | |
2208 | if (value == UINT64_MAX) | |
2209 | continue; | |
2210 | ||
2211 | have_io_accounting = true; | |
2212 | if (value > 0) | |
2213 | any_io = true; | |
2214 | ||
2215 | /* Format IO accounting data for inclusion in the structured log message */ | |
2216 | if (asprintf(&t, "%s=%" PRIu64, io_fields[k], value) < 0) { | |
2217 | r = log_oom(); | |
2218 | goto finish; | |
2219 | } | |
2220 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2221 | ||
2222 | /* Format the IO accounting data for inclusion in the human language message string, but only | |
2223 | * for the bytes counters (and not for the operations counters) */ | |
2224 | if (k == CGROUP_IO_READ_BYTES) { | |
2225 | assert(!rr); | |
2226 | rr = strjoin("read ", format_bytes(buf, sizeof(buf), value), " from disk"); | |
2227 | if (!rr) { | |
2228 | r = log_oom(); | |
2229 | goto finish; | |
2230 | } | |
2231 | } else if (k == CGROUP_IO_WRITE_BYTES) { | |
2232 | assert(!wr); | |
2233 | wr = strjoin("written ", format_bytes(buf, sizeof(buf), value), " to disk"); | |
2234 | if (!wr) { | |
2235 | r = log_oom(); | |
2236 | goto finish; | |
2237 | } | |
2238 | } | |
37109b85 ZJS |
2239 | |
2240 | if (IN_SET(k, CGROUP_IO_READ_BYTES, CGROUP_IO_WRITE_BYTES)) | |
2241 | log_level = raise_level(log_level, | |
2242 | value > MENTIONWORTHY_IO_BYTES, | |
2243 | value > NOTICEWORTHY_IO_BYTES); | |
bc40a20e LP |
2244 | } |
2245 | ||
2246 | if (have_io_accounting) { | |
2247 | if (any_io) { | |
2248 | if (rr) | |
2249 | message_parts[n_message_parts++] = TAKE_PTR(rr); | |
2250 | if (wr) | |
2251 | message_parts[n_message_parts++] = TAKE_PTR(wr); | |
2252 | ||
2253 | } else { | |
2254 | char *k; | |
2255 | ||
2256 | k = strdup("no IO"); | |
2257 | if (!k) { | |
2258 | r = log_oom(); | |
2259 | goto finish; | |
2260 | } | |
2261 | ||
2262 | message_parts[n_message_parts++] = k; | |
2263 | } | |
2264 | } | |
2265 | ||
915b1d01 LP |
2266 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
2267 | char buf[FORMAT_BYTES_MAX] = ""; | |
2268 | uint64_t value = UINT64_MAX; | |
2269 | ||
2270 | assert(ip_fields[m]); | |
2271 | ||
2272 | (void) unit_get_ip_accounting(u, m, &value); | |
2273 | if (value == UINT64_MAX) | |
2274 | continue; | |
82044702 LP |
2275 | |
2276 | have_ip_accounting = true; | |
a87b1faa LP |
2277 | if (value > 0) |
2278 | any_traffic = true; | |
915b1d01 LP |
2279 | |
2280 | /* Format IP accounting data for inclusion in the structured log message */ | |
2281 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2282 | r = log_oom(); | |
2283 | goto finish; | |
2284 | } | |
2285 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2286 | ||
2287 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2288 | * bytes counters (and not for the packets counters) */ | |
a87b1faa LP |
2289 | if (m == CGROUP_IP_INGRESS_BYTES) { |
2290 | assert(!igress); | |
ec9d636b | 2291 | igress = strjoin("received ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2292 | if (!igress) { |
2293 | r = log_oom(); | |
2294 | goto finish; | |
2295 | } | |
2296 | } else if (m == CGROUP_IP_EGRESS_BYTES) { | |
2297 | assert(!egress); | |
ec9d636b | 2298 | egress = strjoin("sent ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2299 | if (!egress) { |
2300 | r = log_oom(); | |
2301 | goto finish; | |
2302 | } | |
2303 | } | |
37109b85 ZJS |
2304 | |
2305 | if (IN_SET(m, CGROUP_IP_INGRESS_BYTES, CGROUP_IP_EGRESS_BYTES)) | |
2306 | log_level = raise_level(log_level, | |
2307 | value > MENTIONWORTHY_IP_BYTES, | |
2308 | value > NOTICEWORTHY_IP_BYTES); | |
a87b1faa LP |
2309 | } |
2310 | ||
82044702 LP |
2311 | if (have_ip_accounting) { |
2312 | if (any_traffic) { | |
2313 | if (igress) | |
2314 | message_parts[n_message_parts++] = TAKE_PTR(igress); | |
2315 | if (egress) | |
2316 | message_parts[n_message_parts++] = TAKE_PTR(egress); | |
a87b1faa | 2317 | |
82044702 LP |
2318 | } else { |
2319 | char *k; | |
915b1d01 | 2320 | |
82044702 LP |
2321 | k = strdup("no IP traffic"); |
2322 | if (!k) { | |
2323 | r = log_oom(); | |
2324 | goto finish; | |
2325 | } | |
2326 | ||
2327 | message_parts[n_message_parts++] = k; | |
2328 | } | |
915b1d01 LP |
2329 | } |
2330 | ||
2331 | /* Is there any accounting data available at all? */ | |
2332 | if (n_iovec == 0) { | |
2333 | r = 0; | |
2334 | goto finish; | |
2335 | } | |
2336 | ||
2337 | if (n_message_parts == 0) | |
a87b1faa | 2338 | t = strjoina("MESSAGE=", u->id, ": Completed."); |
915b1d01 LP |
2339 | else { |
2340 | _cleanup_free_ char *joined; | |
2341 | ||
2342 | message_parts[n_message_parts] = NULL; | |
2343 | ||
2344 | joined = strv_join(message_parts, ", "); | |
2345 | if (!joined) { | |
2346 | r = log_oom(); | |
2347 | goto finish; | |
2348 | } | |
2349 | ||
ec9d636b | 2350 | joined[0] = ascii_toupper(joined[0]); |
a87b1faa | 2351 | t = strjoina("MESSAGE=", u->id, ": ", joined, "."); |
915b1d01 LP |
2352 | } |
2353 | ||
2354 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2355 | * and hence don't increase n_iovec for them */ | |
2356 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2357 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2358 | ||
2359 | t = strjoina(u->manager->unit_log_field, u->id); | |
2360 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2361 | ||
2362 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2363 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2364 | ||
37109b85 | 2365 | log_struct_iovec(log_level, iovec, n_iovec + 4); |
915b1d01 LP |
2366 | r = 0; |
2367 | ||
2368 | finish: | |
2369 | for (i = 0; i < n_message_parts; i++) | |
2370 | free(message_parts[i]); | |
2371 | ||
2372 | for (i = 0; i < n_iovec; i++) | |
2373 | free(iovec[i].iov_base); | |
2374 | ||
2375 | return r; | |
2376 | ||
2377 | } | |
2378 | ||
adefcf28 LP |
2379 | static void unit_update_on_console(Unit *u) { |
2380 | bool b; | |
2381 | ||
2382 | assert(u); | |
2383 | ||
2384 | b = unit_needs_console(u); | |
2385 | if (u->on_console == b) | |
2386 | return; | |
2387 | ||
2388 | u->on_console = b; | |
2389 | if (b) | |
2390 | manager_ref_console(u->manager); | |
2391 | else | |
2392 | manager_unref_console(u->manager); | |
adefcf28 LP |
2393 | } |
2394 | ||
6eb65e7c LP |
2395 | static void unit_emit_audit_start(Unit *u) { |
2396 | assert(u); | |
2397 | ||
2398 | if (u->type != UNIT_SERVICE) | |
2399 | return; | |
2400 | ||
2401 | /* Write audit record if we have just finished starting up */ | |
2402 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); | |
2403 | u->in_audit = true; | |
2404 | } | |
2405 | ||
2406 | static void unit_emit_audit_stop(Unit *u, UnitActiveState state) { | |
2407 | assert(u); | |
2408 | ||
2409 | if (u->type != UNIT_SERVICE) | |
2410 | return; | |
2411 | ||
2412 | if (u->in_audit) { | |
2413 | /* Write audit record if we have just finished shutting down */ | |
2414 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, state == UNIT_INACTIVE); | |
2415 | u->in_audit = false; | |
2416 | } else { | |
2417 | /* Hmm, if there was no start record written write it now, so that we always have a nice pair */ | |
2418 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, state == UNIT_INACTIVE); | |
2419 | ||
2420 | if (state == UNIT_INACTIVE) | |
2421 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); | |
2422 | } | |
2423 | } | |
2424 | ||
16c74914 LP |
2425 | static bool unit_process_job(Job *j, UnitActiveState ns, UnitNotifyFlags flags) { |
2426 | bool unexpected = false; | |
31cd5f63 | 2427 | JobResult result; |
16c74914 LP |
2428 | |
2429 | assert(j); | |
2430 | ||
2431 | if (j->state == JOB_WAITING) | |
2432 | ||
2433 | /* So we reached a different state for this job. Let's see if we can run it now if it failed previously | |
2434 | * due to EAGAIN. */ | |
2435 | job_add_to_run_queue(j); | |
2436 | ||
2437 | /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and | |
2438 | * hence needs to invalidate jobs. */ | |
2439 | ||
2440 | switch (j->type) { | |
2441 | ||
2442 | case JOB_START: | |
2443 | case JOB_VERIFY_ACTIVE: | |
2444 | ||
2445 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
2446 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2447 | else if (j->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
2448 | unexpected = true; | |
2449 | ||
31cd5f63 AZ |
2450 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
2451 | if (ns == UNIT_FAILED) | |
2452 | result = JOB_FAILED; | |
2453 | else if (FLAGS_SET(flags, UNIT_NOTIFY_SKIP_CONDITION)) | |
2454 | result = JOB_SKIPPED; | |
2455 | else | |
2456 | result = JOB_DONE; | |
2457 | ||
2458 | job_finish_and_invalidate(j, result, true, false); | |
2459 | } | |
16c74914 LP |
2460 | } |
2461 | ||
2462 | break; | |
2463 | ||
2464 | case JOB_RELOAD: | |
2465 | case JOB_RELOAD_OR_START: | |
2466 | case JOB_TRY_RELOAD: | |
2467 | ||
2468 | if (j->state == JOB_RUNNING) { | |
2469 | if (ns == UNIT_ACTIVE) | |
2470 | job_finish_and_invalidate(j, (flags & UNIT_NOTIFY_RELOAD_FAILURE) ? JOB_FAILED : JOB_DONE, true, false); | |
2471 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { | |
2472 | unexpected = true; | |
2473 | ||
2474 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2475 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2476 | } | |
2477 | } | |
2478 | ||
2479 | break; | |
2480 | ||
2481 | case JOB_STOP: | |
2482 | case JOB_RESTART: | |
2483 | case JOB_TRY_RESTART: | |
2484 | ||
2485 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2486 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2487 | else if (j->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
2488 | unexpected = true; | |
2489 | job_finish_and_invalidate(j, JOB_FAILED, true, false); | |
2490 | } | |
2491 | ||
2492 | break; | |
2493 | ||
2494 | default: | |
2495 | assert_not_reached("Job type unknown"); | |
2496 | } | |
2497 | ||
2498 | return unexpected; | |
2499 | } | |
2500 | ||
2ad2e41a | 2501 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, UnitNotifyFlags flags) { |
429926e9 | 2502 | const char *reason; |
8559b3b7 | 2503 | Manager *m; |
a096ed36 | 2504 | |
87f0e418 LP |
2505 | assert(u); |
2506 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2507 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2508 | |
8559b3b7 LP |
2509 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2510 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2511 | * remounted this function will be called too! */ | |
87f0e418 | 2512 | |
546ac4f0 MS |
2513 | m = u->manager; |
2514 | ||
3c4832ad LP |
2515 | /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in |
2516 | * the bus queue, so that any job change signal queued will force out the unit change signal first. */ | |
2517 | unit_add_to_dbus_queue(u); | |
2518 | ||
f755e3b7 | 2519 | /* Update timestamps for state changes */ |
2c289ea8 | 2520 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2521 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2522 | |
bdbf9951 | 2523 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2524 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2525 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2526 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2527 | |
2528 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2529 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2530 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2531 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2532 | } |
87f0e418 | 2533 | |
865cc19a | 2534 | /* Keep track of failed units */ |
8724defe | 2535 | (void) manager_update_failed_units(m, u, ns == UNIT_FAILED); |
f755e3b7 | 2536 | |
d3070fbd LP |
2537 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2538 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
efdb0237 | 2539 | unit_prune_cgroup(u); |
d3070fbd LP |
2540 | unit_unlink_state_files(u); |
2541 | } | |
fb385181 | 2542 | |
adefcf28 | 2543 | unit_update_on_console(u); |
7ed9f6cd | 2544 | |
2c289ea8 | 2545 | if (!MANAGER_IS_RELOADING(m)) { |
a1c7334b LP |
2546 | bool unexpected; |
2547 | ||
2548 | /* Let's propagate state changes to the job */ | |
2549 | if (u->job) | |
2550 | unexpected = unit_process_job(u->job, ns, flags); | |
2551 | else | |
2552 | unexpected = true; | |
f3bff0eb | 2553 | |
a1c7334b LP |
2554 | /* If this state change happened without being requested by a job, then let's retroactively start or |
2555 | * stop dependencies. We skip that step when deserializing, since we don't want to create any | |
2556 | * additional jobs just because something is already activated. */ | |
bdbf9951 LP |
2557 | |
2558 | if (unexpected) { | |
2559 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2560 | retroactively_start_dependencies(u); | |
2561 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2562 | retroactively_stop_dependencies(u); | |
2563 | } | |
5de9682c | 2564 | |
cd0504d0 | 2565 | /* stop unneeded units regardless if going down was expected or not */ |
a3c1168a | 2566 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
cd0504d0 MS |
2567 | check_unneeded_dependencies(u); |
2568 | ||
bdbf9951 | 2569 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2570 | log_unit_debug(u, "Unit entered failed state."); |
2ad2e41a LP |
2571 | |
2572 | if (!(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
2573 | unit_start_on_failure(u); | |
cd6d0a45 | 2574 | } |
e537352b | 2575 | |
256f65d0 LP |
2576 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns) && !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
2577 | /* This unit just finished starting up */ | |
3b2775c5 | 2578 | |
6eb65e7c | 2579 | unit_emit_audit_start(u); |
546ac4f0 | 2580 | manager_send_unit_plymouth(m, u); |
256f65d0 | 2581 | } |
bdbf9951 | 2582 | |
256f65d0 | 2583 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && !UNIT_IS_INACTIVE_OR_FAILED(os)) { |
915b1d01 | 2584 | /* This unit just stopped/failed. */ |
256f65d0 | 2585 | |
6eb65e7c | 2586 | unit_emit_audit_stop(u, ns); |
915b1d01 | 2587 | unit_log_resources(u); |
cd6d0a45 | 2588 | } |
f278026d LP |
2589 | } |
2590 | ||
31dc1ca3 LP |
2591 | manager_recheck_journal(m); |
2592 | manager_recheck_dbus(m); | |
e63ebf71 | 2593 | |
3ecaa09b | 2594 | unit_trigger_notify(u); |
3b2775c5 | 2595 | |
8724defe | 2596 | if (!MANAGER_IS_RELOADING(m)) { |
8559b3b7 | 2597 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ |
fda09318 | 2598 | unit_submit_to_stop_when_unneeded_queue(u); |
c1e1601e | 2599 | |
8559b3b7 LP |
2600 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens when |
2601 | * something BindsTo= to a Type=oneshot unit, as these units go directly from starting to inactive, | |
ff502445 LP |
2602 | * without ever entering started.) */ |
2603 | unit_check_binds_to(u); | |
53c35a76 | 2604 | |
429926e9 TR |
2605 | if (os != UNIT_FAILED && ns == UNIT_FAILED) { |
2606 | reason = strjoina("unit ", u->id, " failed"); | |
36c4dc08 | 2607 | emergency_action(m, u->failure_action, 0, u->reboot_arg, unit_failure_action_exit_status(u), reason); |
429926e9 TR |
2608 | } else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) { |
2609 | reason = strjoina("unit ", u->id, " succeeded"); | |
36c4dc08 | 2610 | emergency_action(m, u->success_action, 0, u->reboot_arg, unit_success_action_exit_status(u), reason); |
429926e9 | 2611 | } |
ff502445 LP |
2612 | } |
2613 | ||
701cc384 | 2614 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2615 | } |
2616 | ||
f75f613d | 2617 | int unit_watch_pid(Unit *u, pid_t pid, bool exclusive) { |
62a76913 | 2618 | int r; |
a911bb9a | 2619 | |
87f0e418 | 2620 | assert(u); |
62a76913 | 2621 | assert(pid_is_valid(pid)); |
87f0e418 | 2622 | |
62a76913 | 2623 | /* Watch a specific PID */ |
5ba6985b | 2624 | |
f75f613d FB |
2625 | /* Caller might be sure that this PID belongs to this unit only. Let's take this |
2626 | * opportunity to remove any stalled references to this PID as they can be created | |
2627 | * easily (when watching a process which is not our direct child). */ | |
2628 | if (exclusive) | |
2629 | manager_unwatch_pid(u->manager, pid); | |
2630 | ||
d5099efc | 2631 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2632 | if (r < 0) |
2633 | return r; | |
2634 | ||
62a76913 | 2635 | r = hashmap_ensure_allocated(&u->manager->watch_pids, NULL); |
a911bb9a LP |
2636 | if (r < 0) |
2637 | return r; | |
2638 | ||
62a76913 LP |
2639 | /* First try, let's add the unit keyed by "pid". */ |
2640 | r = hashmap_put(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2641 | if (r == -EEXIST) { | |
2642 | Unit **array; | |
2643 | bool found = false; | |
2644 | size_t n = 0; | |
05e343b7 | 2645 | |
62a76913 LP |
2646 | /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points |
2647 | * to an array of Units rather than just a Unit), lists us already. */ | |
a911bb9a | 2648 | |
62a76913 LP |
2649 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); |
2650 | if (array) | |
2651 | for (; array[n]; n++) | |
2652 | if (array[n] == u) | |
2653 | found = true; | |
a911bb9a | 2654 | |
62a76913 LP |
2655 | if (found) /* Found it already? if so, do nothing */ |
2656 | r = 0; | |
2657 | else { | |
2658 | Unit **new_array; | |
2659 | ||
2660 | /* Allocate a new array */ | |
2661 | new_array = new(Unit*, n + 2); | |
2662 | if (!new_array) | |
2663 | return -ENOMEM; | |
2664 | ||
2665 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2666 | new_array[n] = u; | |
2667 | new_array[n+1] = NULL; | |
2668 | ||
2669 | /* Add or replace the old array */ | |
2670 | r = hashmap_replace(u->manager->watch_pids, PID_TO_PTR(-pid), new_array); | |
2671 | if (r < 0) { | |
2672 | free(new_array); | |
2673 | return r; | |
2674 | } | |
2675 | ||
2676 | free(array); | |
2677 | } | |
2678 | } else if (r < 0) | |
2679 | return r; | |
2680 | ||
2681 | r = set_put(u->pids, PID_TO_PTR(pid)); | |
2682 | if (r < 0) | |
2683 | return r; | |
2684 | ||
2685 | return 0; | |
87f0e418 LP |
2686 | } |
2687 | ||
2688 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
62a76913 LP |
2689 | Unit **array; |
2690 | ||
87f0e418 | 2691 | assert(u); |
62a76913 LP |
2692 | assert(pid_is_valid(pid)); |
2693 | ||
2694 | /* First let's drop the unit in case it's keyed as "pid". */ | |
2695 | (void) hashmap_remove_value(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2696 | ||
2697 | /* Then, let's also drop the unit, in case it's in the array keyed by -pid */ | |
2698 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); | |
2699 | if (array) { | |
2700 | size_t n, m = 0; | |
2701 | ||
2702 | /* Let's iterate through the array, dropping our own entry */ | |
2703 | for (n = 0; array[n]; n++) | |
2704 | if (array[n] != u) | |
2705 | array[m++] = array[n]; | |
2706 | array[m] = NULL; | |
2707 | ||
2708 | if (m == 0) { | |
2709 | /* The array is now empty, remove the entire entry */ | |
2710 | assert(hashmap_remove(u->manager->watch_pids, PID_TO_PTR(-pid)) == array); | |
2711 | free(array); | |
2712 | } | |
2713 | } | |
87f0e418 | 2714 | |
fea72cc0 | 2715 | (void) set_remove(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2716 | } |
2717 | ||
bd44e61b LP |
2718 | void unit_unwatch_all_pids(Unit *u) { |
2719 | assert(u); | |
2720 | ||
2721 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2722 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2723 | |
efdb0237 | 2724 | u->pids = set_free(u->pids); |
a911bb9a LP |
2725 | } |
2726 | ||
50be4f4a LP |
2727 | static void unit_tidy_watch_pids(Unit *u) { |
2728 | pid_t except1, except2; | |
a911bb9a LP |
2729 | Iterator i; |
2730 | void *e; | |
2731 | ||
2732 | assert(u); | |
2733 | ||
2734 | /* Cleans dead PIDs from our list */ | |
2735 | ||
50be4f4a LP |
2736 | except1 = unit_main_pid(u); |
2737 | except2 = unit_control_pid(u); | |
2738 | ||
a911bb9a | 2739 | SET_FOREACH(e, u->pids, i) { |
fea72cc0 | 2740 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2741 | |
2742 | if (pid == except1 || pid == except2) | |
2743 | continue; | |
2744 | ||
9f5650ae | 2745 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2746 | unit_unwatch_pid(u, pid); |
a911bb9a | 2747 | } |
87f0e418 LP |
2748 | } |
2749 | ||
50be4f4a LP |
2750 | static int on_rewatch_pids_event(sd_event_source *s, void *userdata) { |
2751 | Unit *u = userdata; | |
2752 | ||
2753 | assert(s); | |
2754 | assert(u); | |
2755 | ||
2756 | unit_tidy_watch_pids(u); | |
2757 | unit_watch_all_pids(u); | |
2758 | ||
2759 | /* If the PID set is empty now, then let's finish this off. */ | |
2760 | unit_synthesize_cgroup_empty_event(u); | |
2761 | ||
2762 | return 0; | |
2763 | } | |
2764 | ||
2765 | int unit_enqueue_rewatch_pids(Unit *u) { | |
2766 | int r; | |
2767 | ||
2768 | assert(u); | |
2769 | ||
2770 | if (!u->cgroup_path) | |
2771 | return -ENOENT; | |
2772 | ||
2773 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
2774 | if (r < 0) | |
2775 | return r; | |
2776 | if (r > 0) /* On unified we can use proper notifications */ | |
2777 | return 0; | |
2778 | ||
2779 | /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new | |
2780 | * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it | |
2781 | * involves issuing kill(pid, 0) on all processes we watch. */ | |
2782 | ||
2783 | if (!u->rewatch_pids_event_source) { | |
2784 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
2785 | ||
2786 | r = sd_event_add_defer(u->manager->event, &s, on_rewatch_pids_event, u); | |
2787 | if (r < 0) | |
2788 | return log_error_errno(r, "Failed to allocate event source for tidying watched PIDs: %m"); | |
2789 | ||
2790 | r = sd_event_source_set_priority(s, SD_EVENT_PRIORITY_IDLE); | |
2791 | if (r < 0) | |
28b77ab2 | 2792 | return log_error_errno(r, "Failed to adjust priority of event source for tidying watched PIDs: %m"); |
50be4f4a LP |
2793 | |
2794 | (void) sd_event_source_set_description(s, "tidy-watch-pids"); | |
2795 | ||
2796 | u->rewatch_pids_event_source = TAKE_PTR(s); | |
2797 | } | |
2798 | ||
2799 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_ONESHOT); | |
2800 | if (r < 0) | |
2801 | return log_error_errno(r, "Failed to enable event source for tidying watched PIDs: %m"); | |
2802 | ||
2803 | return 0; | |
2804 | } | |
2805 | ||
2806 | void unit_dequeue_rewatch_pids(Unit *u) { | |
2807 | int r; | |
2808 | assert(u); | |
2809 | ||
2810 | if (!u->rewatch_pids_event_source) | |
2811 | return; | |
2812 | ||
2813 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_OFF); | |
2814 | if (r < 0) | |
2815 | log_warning_errno(r, "Failed to disable event source for tidying watched PIDs, ignoring: %m"); | |
2816 | ||
2817 | u->rewatch_pids_event_source = sd_event_source_unref(u->rewatch_pids_event_source); | |
2818 | } | |
2819 | ||
87f0e418 LP |
2820 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2821 | assert(u); | |
2822 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2823 | ||
2824 | switch (j) { | |
2825 | ||
2826 | case JOB_VERIFY_ACTIVE: | |
2827 | case JOB_START: | |
e0209d83 | 2828 | case JOB_NOP: |
f5869324 LP |
2829 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
2830 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueing | |
2831 | * jobs for it. */ | |
87f0e418 LP |
2832 | return true; |
2833 | ||
f5869324 LP |
2834 | case JOB_STOP: |
2835 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
2836 | * external events), hence it makes no sense to permit enqueing such a request either. */ | |
2837 | return !u->perpetual; | |
2838 | ||
87f0e418 LP |
2839 | case JOB_RESTART: |
2840 | case JOB_TRY_RESTART: | |
f5869324 | 2841 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
2842 | |
2843 | case JOB_RELOAD: | |
3282591d | 2844 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2845 | return unit_can_reload(u); |
2846 | ||
2847 | case JOB_RELOAD_OR_START: | |
2848 | return unit_can_reload(u) && unit_can_start(u); | |
2849 | ||
2850 | default: | |
2851 | assert_not_reached("Invalid job type"); | |
2852 | } | |
2853 | } | |
2854 | ||
f2341e0a LP |
2855 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2856 | assert(u); | |
d1fab3fe | 2857 | |
f2341e0a LP |
2858 | /* Only warn about some unit types */ |
2859 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2860 | return; | |
3f3cc397 | 2861 | |
f2341e0a LP |
2862 | if (streq_ptr(u->id, other)) |
2863 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2864 | else | |
2865 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2866 | } |
2867 | ||
eef85c4a LP |
2868 | static int unit_add_dependency_hashmap( |
2869 | Hashmap **h, | |
2870 | Unit *other, | |
2871 | UnitDependencyMask origin_mask, | |
2872 | UnitDependencyMask destination_mask) { | |
2873 | ||
2874 | UnitDependencyInfo info; | |
2875 | int r; | |
2876 | ||
2877 | assert(h); | |
2878 | assert(other); | |
2879 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2880 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2881 | assert(origin_mask > 0 || destination_mask > 0); | |
2882 | ||
2883 | r = hashmap_ensure_allocated(h, NULL); | |
2884 | if (r < 0) | |
2885 | return r; | |
2886 | ||
2887 | assert_cc(sizeof(void*) == sizeof(info)); | |
2888 | ||
2889 | info.data = hashmap_get(*h, other); | |
2890 | if (info.data) { | |
2891 | /* Entry already exists. Add in our mask. */ | |
2892 | ||
d94a24ca ZJS |
2893 | if (FLAGS_SET(origin_mask, info.origin_mask) && |
2894 | FLAGS_SET(destination_mask, info.destination_mask)) | |
eef85c4a LP |
2895 | return 0; /* NOP */ |
2896 | ||
2897 | info.origin_mask |= origin_mask; | |
2898 | info.destination_mask |= destination_mask; | |
2899 | ||
2900 | r = hashmap_update(*h, other, info.data); | |
2901 | } else { | |
2902 | info = (UnitDependencyInfo) { | |
2903 | .origin_mask = origin_mask, | |
2904 | .destination_mask = destination_mask, | |
2905 | }; | |
2906 | ||
2907 | r = hashmap_put(*h, other, info.data); | |
2908 | } | |
2909 | if (r < 0) | |
2910 | return r; | |
2911 | ||
2912 | return 1; | |
2913 | } | |
2914 | ||
2915 | int unit_add_dependency( | |
2916 | Unit *u, | |
2917 | UnitDependency d, | |
2918 | Unit *other, | |
2919 | bool add_reference, | |
2920 | UnitDependencyMask mask) { | |
87f0e418 LP |
2921 | |
2922 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2923 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 2924 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 2925 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 2926 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2927 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 2928 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 2929 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 2930 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 2931 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2932 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2933 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2934 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2935 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2936 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2937 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2938 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2939 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2940 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2941 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2942 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2943 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2944 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2945 | }; |
eef85c4a LP |
2946 | Unit *original_u = u, *original_other = other; |
2947 | int r; | |
87f0e418 LP |
2948 | |
2949 | assert(u); | |
2950 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2951 | assert(other); |
2952 | ||
9f151f29 LP |
2953 | u = unit_follow_merge(u); |
2954 | other = unit_follow_merge(other); | |
2955 | ||
87f0e418 LP |
2956 | /* We won't allow dependencies on ourselves. We will not |
2957 | * consider them an error however. */ | |
d1fab3fe | 2958 | if (u == other) { |
eef85c4a | 2959 | maybe_warn_about_dependency(original_u, original_other->id, d); |
87f0e418 | 2960 | return 0; |
d1fab3fe | 2961 | } |
87f0e418 | 2962 | |
eef85c4a LP |
2963 | if ((d == UNIT_BEFORE && other->type == UNIT_DEVICE) || |
2964 | (d == UNIT_AFTER && u->type == UNIT_DEVICE)) { | |
dd5e7000 ZJS |
2965 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
2966 | return 0; | |
2967 | } | |
2968 | ||
eef85c4a | 2969 | r = unit_add_dependency_hashmap(u->dependencies + d, other, mask, 0); |
613b411c | 2970 | if (r < 0) |
87f0e418 LP |
2971 | return r; |
2972 | ||
eef85c4a LP |
2973 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2974 | r = unit_add_dependency_hashmap(other->dependencies + inverse_table[d], u, 0, mask); | |
613b411c LP |
2975 | if (r < 0) |
2976 | return r; | |
2977 | } | |
2978 | ||
2979 | if (add_reference) { | |
eef85c4a | 2980 | r = unit_add_dependency_hashmap(u->dependencies + UNIT_REFERENCES, other, mask, 0); |
613b411c | 2981 | if (r < 0) |
5de9682c LP |
2982 | return r; |
2983 | ||
eef85c4a | 2984 | r = unit_add_dependency_hashmap(other->dependencies + UNIT_REFERENCED_BY, u, 0, mask); |
613b411c | 2985 | if (r < 0) |
701cc384 | 2986 | return r; |
613b411c | 2987 | } |
87f0e418 | 2988 | |
c1e1601e | 2989 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
2990 | return 0; |
2991 | } | |
0301abf4 | 2992 | |
eef85c4a | 2993 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
2c966c03 LP |
2994 | int r; |
2995 | ||
2996 | assert(u); | |
2997 | ||
eef85c4a | 2998 | r = unit_add_dependency(u, d, other, add_reference, mask); |
3f3cc397 | 2999 | if (r < 0) |
2c966c03 LP |
3000 | return r; |
3001 | ||
eef85c4a | 3002 | return unit_add_dependency(u, e, other, add_reference, mask); |
2c966c03 LP |
3003 | } |
3004 | ||
23e8c796 | 3005 | static int resolve_template(Unit *u, const char *name, char **buf, const char **ret) { |
7410616c | 3006 | int r; |
9e2f7c11 LP |
3007 | |
3008 | assert(u); | |
23e8c796 | 3009 | assert(name); |
7410616c LP |
3010 | assert(buf); |
3011 | assert(ret); | |
9e2f7c11 | 3012 | |
7410616c LP |
3013 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
3014 | *buf = NULL; | |
3015 | *ret = name; | |
3016 | return 0; | |
9e2f7c11 LP |
3017 | } |
3018 | ||
ac155bb8 | 3019 | if (u->instance) |
7410616c | 3020 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 3021 | else { |
ae018d9b | 3022 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 3023 | |
7410616c LP |
3024 | r = unit_name_to_prefix(u->id, &i); |
3025 | if (r < 0) | |
3026 | return r; | |
9e2f7c11 | 3027 | |
7410616c | 3028 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 3029 | } |
7410616c LP |
3030 | if (r < 0) |
3031 | return r; | |
9e2f7c11 | 3032 | |
7410616c LP |
3033 | *ret = *buf; |
3034 | return 0; | |
9e2f7c11 LP |
3035 | } |
3036 | ||
35d8c19a | 3037 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3038 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
3039 | Unit *other; |
3040 | int r; | |
3041 | ||
9e2f7c11 | 3042 | assert(u); |
35d8c19a | 3043 | assert(name); |
09b6b09f | 3044 | |
23e8c796 | 3045 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3046 | if (r < 0) |
3047 | return r; | |
09b6b09f | 3048 | |
35d8c19a | 3049 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
8afbb8e1 LP |
3050 | if (r < 0) |
3051 | return r; | |
9e2f7c11 | 3052 | |
eef85c4a | 3053 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
3054 | } |
3055 | ||
5a724170 | 3056 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3057 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
3058 | Unit *other; |
3059 | int r; | |
2c966c03 LP |
3060 | |
3061 | assert(u); | |
5a724170 | 3062 | assert(name); |
2c966c03 | 3063 | |
23e8c796 | 3064 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3065 | if (r < 0) |
3066 | return r; | |
2c966c03 | 3067 | |
5a724170 | 3068 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
3f3cc397 | 3069 | if (r < 0) |
68eda4bd | 3070 | return r; |
2c966c03 | 3071 | |
eef85c4a | 3072 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
3073 | } |
3074 | ||
0301abf4 | 3075 | int set_unit_path(const char *p) { |
0301abf4 | 3076 | /* This is mostly for debug purposes */ |
cbe46ead | 3077 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 3078 | return -errno; |
0301abf4 LP |
3079 | |
3080 | return 0; | |
3081 | } | |
88066b3a | 3082 | |
ea430986 | 3083 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
3084 | assert(u); |
3085 | ||
ac155bb8 | 3086 | if (!u->id) |
04ade7d2 LP |
3087 | return NULL; |
3088 | ||
48899192 | 3089 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
3090 | } |
3091 | ||
4b58153d LP |
3092 | char *unit_dbus_path_invocation_id(Unit *u) { |
3093 | assert(u); | |
3094 | ||
3095 | if (sd_id128_is_null(u->invocation_id)) | |
3096 | return NULL; | |
3097 | ||
3098 | return unit_dbus_path_from_name(u->invocation_id_string); | |
3099 | } | |
3100 | ||
d79200e2 LP |
3101 | int unit_set_slice(Unit *u, Unit *slice) { |
3102 | assert(u); | |
3103 | assert(slice); | |
3104 | ||
3105 | /* Sets the unit slice if it has not been set before. Is extra | |
3106 | * careful, to only allow this for units that actually have a | |
3107 | * cgroup context. Also, we don't allow to set this for slices | |
3108 | * (since the parent slice is derived from the name). Make | |
3109 | * sure the unit we set is actually a slice. */ | |
3110 | ||
3111 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3112 | return -EOPNOTSUPP; | |
3113 | ||
3114 | if (u->type == UNIT_SLICE) | |
3115 | return -EINVAL; | |
3116 | ||
102ef982 LP |
3117 | if (unit_active_state(u) != UNIT_INACTIVE) |
3118 | return -EBUSY; | |
3119 | ||
d79200e2 LP |
3120 | if (slice->type != UNIT_SLICE) |
3121 | return -EINVAL; | |
3122 | ||
efdb0237 LP |
3123 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
3124 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
3125 | return -EPERM; | |
3126 | ||
d79200e2 LP |
3127 | if (UNIT_DEREF(u->slice) == slice) |
3128 | return 0; | |
3129 | ||
99e66921 TH |
3130 | /* Disallow slice changes if @u is already bound to cgroups */ |
3131 | if (UNIT_ISSET(u->slice) && u->cgroup_realized) | |
d79200e2 LP |
3132 | return -EBUSY; |
3133 | ||
7f7d01ed | 3134 | unit_ref_set(&u->slice, u, slice); |
d79200e2 LP |
3135 | return 1; |
3136 | } | |
3137 | ||
3138 | int unit_set_default_slice(Unit *u) { | |
a8833944 | 3139 | const char *slice_name; |
a016b922 LP |
3140 | Unit *slice; |
3141 | int r; | |
3142 | ||
3143 | assert(u); | |
3144 | ||
9444b1f2 | 3145 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
3146 | return 0; |
3147 | ||
a8833944 LP |
3148 | if (u->instance) { |
3149 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 3150 | |
a8833944 LP |
3151 | /* Implicitly place all instantiated units in their |
3152 | * own per-template slice */ | |
3153 | ||
7410616c LP |
3154 | r = unit_name_to_prefix(u->id, &prefix); |
3155 | if (r < 0) | |
3156 | return r; | |
a8833944 LP |
3157 | |
3158 | /* The prefix is already escaped, but it might include | |
3159 | * "-" which has a special meaning for slice units, | |
3160 | * hence escape it here extra. */ | |
7410616c | 3161 | escaped = unit_name_escape(prefix); |
a8833944 LP |
3162 | if (!escaped) |
3163 | return -ENOMEM; | |
3164 | ||
463d0d15 | 3165 | if (MANAGER_IS_SYSTEM(u->manager)) |
00e7b3c8 | 3166 | slice_name = strjoina("system-", escaped, ".slice"); |
a8833944 | 3167 | else |
00e7b3c8 | 3168 | slice_name = strjoina(escaped, ".slice"); |
a8833944 LP |
3169 | } else |
3170 | slice_name = | |
463d0d15 | 3171 | MANAGER_IS_SYSTEM(u->manager) && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
3172 | ? SPECIAL_SYSTEM_SLICE |
3173 | : SPECIAL_ROOT_SLICE; | |
3174 | ||
3175 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
3176 | if (r < 0) |
3177 | return r; | |
3178 | ||
d79200e2 | 3179 | return unit_set_slice(u, slice); |
a016b922 LP |
3180 | } |
3181 | ||
9444b1f2 LP |
3182 | const char *unit_slice_name(Unit *u) { |
3183 | assert(u); | |
3184 | ||
3185 | if (!UNIT_ISSET(u->slice)) | |
3186 | return NULL; | |
3187 | ||
3188 | return UNIT_DEREF(u->slice)->id; | |
3189 | } | |
3190 | ||
f6ff8c29 | 3191 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 3192 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
3193 | int r; |
3194 | ||
3195 | assert(u); | |
3196 | assert(type); | |
3197 | assert(_found); | |
3198 | ||
7410616c LP |
3199 | r = unit_name_change_suffix(u->id, type, &t); |
3200 | if (r < 0) | |
3201 | return r; | |
3202 | if (unit_has_name(u, t)) | |
3203 | return -EINVAL; | |
f6ff8c29 | 3204 | |
ac155bb8 | 3205 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3206 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3207 | return r; |
3208 | } | |
3209 | ||
bbc29086 DM |
3210 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
3211 | const char *name, *old_owner, *new_owner; | |
3212 | Unit *u = userdata; | |
3213 | int r; | |
3214 | ||
3215 | assert(message); | |
3216 | assert(u); | |
3217 | ||
3218 | r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner); | |
3219 | if (r < 0) { | |
3220 | bus_log_parse_error(r); | |
3221 | return 0; | |
3222 | } | |
3223 | ||
a8ea93a5 LP |
3224 | old_owner = empty_to_null(old_owner); |
3225 | new_owner = empty_to_null(new_owner); | |
b0076268 | 3226 | |
bbc29086 | 3227 | if (UNIT_VTABLE(u)->bus_name_owner_change) |
a5a8776a MJ |
3228 | UNIT_VTABLE(u)->bus_name_owner_change(u, old_owner, new_owner); |
3229 | ||
3230 | return 0; | |
3231 | } | |
3232 | ||
3233 | static int get_name_owner_handler(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
3234 | const sd_bus_error *e; | |
3235 | const char *new_owner; | |
3236 | Unit *u = userdata; | |
3237 | int r; | |
3238 | ||
3239 | assert(message); | |
3240 | assert(u); | |
3241 | ||
3242 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); | |
3243 | ||
3244 | if (sd_bus_error_is_set(error)) { | |
3245 | log_error("Failed to get name owner from bus: %s", error->message); | |
3246 | return 0; | |
3247 | } | |
3248 | ||
3249 | e = sd_bus_message_get_error(message); | |
3250 | if (sd_bus_error_has_name(e, "org.freedesktop.DBus.Error.NameHasNoOwner")) | |
3251 | return 0; | |
3252 | ||
3253 | if (e) { | |
3254 | log_error("Unexpected error response from GetNameOwner: %s", e->message); | |
3255 | return 0; | |
3256 | } | |
3257 | ||
3258 | r = sd_bus_message_read(message, "s", &new_owner); | |
3259 | if (r < 0) { | |
3260 | bus_log_parse_error(r); | |
3261 | return 0; | |
3262 | } | |
3263 | ||
3264 | new_owner = empty_to_null(new_owner); | |
3265 | ||
3266 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
3267 | UNIT_VTABLE(u)->bus_name_owner_change(u, NULL, new_owner); | |
bbc29086 DM |
3268 | |
3269 | return 0; | |
3270 | } | |
3271 | ||
9806e87d LP |
3272 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3273 | const char *match; | |
bbc29086 | 3274 | |
9806e87d LP |
3275 | assert(u); |
3276 | assert(bus); | |
3277 | assert(name); | |
bbc29086 DM |
3278 | |
3279 | if (u->match_bus_slot) | |
3280 | return -EBUSY; | |
3281 | ||
9806e87d | 3282 | match = strjoina("type='signal'," |
81d62103 ZJS |
3283 | "sender='org.freedesktop.DBus'," |
3284 | "path='/org/freedesktop/DBus'," | |
3285 | "interface='org.freedesktop.DBus'," | |
3286 | "member='NameOwnerChanged'," | |
3287 | "arg0='", name, "'"); | |
bbc29086 | 3288 | |
a5a8776a MJ |
3289 | int r = sd_bus_add_match_async(bus, &u->match_bus_slot, match, signal_name_owner_changed, NULL, u); |
3290 | if (r < 0) | |
3291 | return r; | |
3292 | ||
3293 | return sd_bus_call_method_async(bus, | |
3294 | &u->get_name_owner_slot, | |
3295 | "org.freedesktop.DBus", | |
3296 | "/org/freedesktop/DBus", | |
3297 | "org.freedesktop.DBus", | |
3298 | "GetNameOwner", | |
3299 | get_name_owner_handler, | |
3300 | u, | |
3301 | "s", name); | |
bbc29086 DM |
3302 | } |
3303 | ||
05e343b7 | 3304 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3305 | int r; |
3306 | ||
05e343b7 LP |
3307 | assert(u); |
3308 | assert(name); | |
3309 | ||
3310 | /* Watch a specific name on the bus. We only support one unit | |
3311 | * watching each name for now. */ | |
3312 | ||
bbc29086 DM |
3313 | if (u->manager->api_bus) { |
3314 | /* If the bus is already available, install the match directly. | |
3315 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3316 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3317 | if (r < 0) |
8ea823b6 | 3318 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3319 | } |
3320 | ||
3321 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3322 | if (r < 0) { | |
3323 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3324 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); | |
3325 | } | |
3326 | ||
3327 | return 0; | |
05e343b7 LP |
3328 | } |
3329 | ||
3330 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3331 | assert(u); | |
3332 | assert(name); | |
3333 | ||
8367fea5 | 3334 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3335 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
a5a8776a | 3336 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
05e343b7 LP |
3337 | } |
3338 | ||
a16e1123 LP |
3339 | bool unit_can_serialize(Unit *u) { |
3340 | assert(u); | |
3341 | ||
3342 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
3343 | } | |
3344 | ||
d68c645b | 3345 | static int serialize_cgroup_mask(FILE *f, const char *key, CGroupMask mask) { |
8b108bd0 | 3346 | _cleanup_free_ char *s = NULL; |
d68c645b | 3347 | int r; |
8b108bd0 FB |
3348 | |
3349 | assert(f); | |
3350 | assert(key); | |
3351 | ||
d68c645b LP |
3352 | if (mask == 0) |
3353 | return 0; | |
3354 | ||
3355 | r = cg_mask_to_string(mask, &s); | |
3356 | if (r < 0) | |
3357 | return log_error_errno(r, "Failed to format cgroup mask: %m"); | |
3358 | ||
3359 | return serialize_item(f, key, s); | |
8b108bd0 FB |
3360 | } |
3361 | ||
b82f71c7 | 3362 | static const char *const ip_accounting_metric_field[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { |
6b659ed8 LP |
3363 | [CGROUP_IP_INGRESS_BYTES] = "ip-accounting-ingress-bytes", |
3364 | [CGROUP_IP_INGRESS_PACKETS] = "ip-accounting-ingress-packets", | |
3365 | [CGROUP_IP_EGRESS_BYTES] = "ip-accounting-egress-bytes", | |
3366 | [CGROUP_IP_EGRESS_PACKETS] = "ip-accounting-egress-packets", | |
3367 | }; | |
3368 | ||
fbe14fc9 LP |
3369 | static const char *const io_accounting_metric_field_base[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
3370 | [CGROUP_IO_READ_BYTES] = "io-accounting-read-bytes-base", | |
3371 | [CGROUP_IO_WRITE_BYTES] = "io-accounting-write-bytes-base", | |
3372 | [CGROUP_IO_READ_OPERATIONS] = "io-accounting-read-operations-base", | |
3373 | [CGROUP_IO_WRITE_OPERATIONS] = "io-accounting-write-operations-base", | |
3374 | }; | |
3375 | ||
3376 | static const char *const io_accounting_metric_field_last[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { | |
3377 | [CGROUP_IO_READ_BYTES] = "io-accounting-read-bytes-last", | |
3378 | [CGROUP_IO_WRITE_BYTES] = "io-accounting-write-bytes-last", | |
3379 | [CGROUP_IO_READ_OPERATIONS] = "io-accounting-read-operations-last", | |
3380 | [CGROUP_IO_WRITE_OPERATIONS] = "io-accounting-write-operations-last", | |
3381 | }; | |
3382 | ||
6b78f9b4 | 3383 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
6b659ed8 | 3384 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3385 | int r; |
3386 | ||
3387 | assert(u); | |
3388 | assert(f); | |
3389 | assert(fds); | |
3390 | ||
9bdb98c5 | 3391 | if (unit_can_serialize(u)) { |
9bdb98c5 | 3392 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
3393 | if (r < 0) |
3394 | return r; | |
e0209d83 MS |
3395 | } |
3396 | ||
d68c645b | 3397 | (void) serialize_dual_timestamp(f, "state-change-timestamp", &u->state_change_timestamp); |
a483fb59 | 3398 | |
d68c645b LP |
3399 | (void) serialize_dual_timestamp(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
3400 | (void) serialize_dual_timestamp(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
3401 | (void) serialize_dual_timestamp(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
3402 | (void) serialize_dual_timestamp(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
a483fb59 | 3403 | |
d68c645b LP |
3404 | (void) serialize_dual_timestamp(f, "condition-timestamp", &u->condition_timestamp); |
3405 | (void) serialize_dual_timestamp(f, "assert-timestamp", &u->assert_timestamp); | |
2791a8f8 | 3406 | |
ac155bb8 | 3407 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
d68c645b | 3408 | (void) serialize_bool(f, "condition-result", u->condition_result); |
10717a1a | 3409 | |
59fccdc5 | 3410 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
d68c645b | 3411 | (void) serialize_bool(f, "assert-result", u->assert_result); |
59fccdc5 | 3412 | |
d68c645b LP |
3413 | (void) serialize_bool(f, "transient", u->transient); |
3414 | (void) serialize_bool(f, "in-audit", u->in_audit); | |
fe700f46 | 3415 | |
d68c645b LP |
3416 | (void) serialize_bool(f, "exported-invocation-id", u->exported_invocation_id); |
3417 | (void) serialize_bool(f, "exported-log-level-max", u->exported_log_level_max); | |
3418 | (void) serialize_bool(f, "exported-log-extra-fields", u->exported_log_extra_fields); | |
5ac1530e ZJS |
3419 | (void) serialize_bool(f, "exported-log-rate-limit-interval", u->exported_log_ratelimit_interval); |
3420 | (void) serialize_bool(f, "exported-log-rate-limit-burst", u->exported_log_ratelimit_burst); | |
0e699122 | 3421 | |
d68c645b | 3422 | (void) serialize_item_format(f, "cpu-usage-base", "%" PRIu64, u->cpu_usage_base); |
fe700f46 | 3423 | if (u->cpu_usage_last != NSEC_INFINITY) |
d68c645b | 3424 | (void) serialize_item_format(f, "cpu-usage-last", "%" PRIu64, u->cpu_usage_last); |
c2756a68 | 3425 | |
afcfaa69 LP |
3426 | if (u->oom_kill_last > 0) |
3427 | (void) serialize_item_format(f, "oom-kill-last", "%" PRIu64, u->oom_kill_last); | |
3428 | ||
fbe14fc9 LP |
3429 | for (CGroupIOAccountingMetric im = 0; im < _CGROUP_IO_ACCOUNTING_METRIC_MAX; im++) { |
3430 | (void) serialize_item_format(f, io_accounting_metric_field_base[im], "%" PRIu64, u->io_accounting_base[im]); | |
3431 | ||
3432 | if (u->io_accounting_last[im] != UINT64_MAX) | |
3433 | (void) serialize_item_format(f, io_accounting_metric_field_last[im], "%" PRIu64, u->io_accounting_last[im]); | |
3434 | } | |
3435 | ||
c2756a68 | 3436 | if (u->cgroup_path) |
d68c645b LP |
3437 | (void) serialize_item(f, "cgroup", u->cgroup_path); |
3438 | ||
3439 | (void) serialize_bool(f, "cgroup-realized", u->cgroup_realized); | |
3440 | (void) serialize_cgroup_mask(f, "cgroup-realized-mask", u->cgroup_realized_mask); | |
3441 | (void) serialize_cgroup_mask(f, "cgroup-enabled-mask", u->cgroup_enabled_mask); | |
3442 | (void) serialize_cgroup_mask(f, "cgroup-invalidated-mask", u->cgroup_invalidated_mask); | |
c2756a68 | 3443 | |
00d9ef85 | 3444 | if (uid_is_valid(u->ref_uid)) |
d68c645b | 3445 | (void) serialize_item_format(f, "ref-uid", UID_FMT, u->ref_uid); |
00d9ef85 | 3446 | if (gid_is_valid(u->ref_gid)) |
d68c645b | 3447 | (void) serialize_item_format(f, "ref-gid", GID_FMT, u->ref_gid); |
00d9ef85 | 3448 | |
4b58153d | 3449 | if (!sd_id128_is_null(u->invocation_id)) |
d68c645b | 3450 | (void) serialize_item_format(f, "invocation-id", SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(u->invocation_id)); |
4b58153d | 3451 | |
05a98afd LP |
3452 | bus_track_serialize(u->bus_track, f, "ref"); |
3453 | ||
6b659ed8 LP |
3454 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
3455 | uint64_t v; | |
3456 | ||
3457 | r = unit_get_ip_accounting(u, m, &v); | |
3458 | if (r >= 0) | |
d68c645b | 3459 | (void) serialize_item_format(f, ip_accounting_metric_field[m], "%" PRIu64, v); |
6b659ed8 LP |
3460 | } |
3461 | ||
613b411c LP |
3462 | if (serialize_jobs) { |
3463 | if (u->job) { | |
d68c645b | 3464 | fputs("job\n", f); |
05a98afd | 3465 | job_serialize(u->job, f); |
613b411c LP |
3466 | } |
3467 | ||
3468 | if (u->nop_job) { | |
d68c645b | 3469 | fputs("job\n", f); |
05a98afd | 3470 | job_serialize(u->nop_job, f); |
613b411c LP |
3471 | } |
3472 | } | |
3473 | ||
a16e1123 LP |
3474 | /* End marker */ |
3475 | fputc('\n', f); | |
3476 | return 0; | |
3477 | } | |
3478 | ||
b17c9620 LP |
3479 | static int unit_deserialize_job(Unit *u, FILE *f) { |
3480 | _cleanup_(job_freep) Job *j = NULL; | |
3481 | int r; | |
3482 | ||
3483 | assert(u); | |
3484 | assert(f); | |
3485 | ||
3486 | j = job_new_raw(u); | |
3487 | if (!j) | |
3488 | return log_oom(); | |
3489 | ||
3490 | r = job_deserialize(j, f); | |
3491 | if (r < 0) | |
3492 | return r; | |
3493 | ||
3494 | r = job_install_deserialized(j); | |
3495 | if (r < 0) | |
3496 | return r; | |
3497 | ||
3498 | TAKE_PTR(j); | |
3499 | return 0; | |
3500 | } | |
3501 | ||
a16e1123 LP |
3502 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
3503 | int r; | |
3504 | ||
3505 | assert(u); | |
3506 | assert(f); | |
3507 | assert(fds); | |
3508 | ||
a16e1123 | 3509 | for (;;) { |
8948b341 | 3510 | _cleanup_free_ char *line = NULL; |
8948b341 | 3511 | char *l, *v; |
83f18c91 | 3512 | ssize_t m; |
a16e1123 LP |
3513 | size_t k; |
3514 | ||
8948b341 LP |
3515 | r = read_line(f, LONG_LINE_MAX, &line); |
3516 | if (r < 0) | |
3517 | return log_error_errno(r, "Failed to read serialization line: %m"); | |
3518 | if (r == 0) /* eof */ | |
3519 | break; | |
a16e1123 LP |
3520 | |
3521 | l = strstrip(line); | |
8948b341 | 3522 | if (isempty(l)) /* End marker */ |
a483fb59 | 3523 | break; |
a16e1123 LP |
3524 | |
3525 | k = strcspn(l, "="); | |
3526 | ||
3527 | if (l[k] == '=') { | |
3528 | l[k] = 0; | |
3529 | v = l+k+1; | |
3530 | } else | |
3531 | v = l+k; | |
3532 | ||
cca098b0 | 3533 | if (streq(l, "job")) { |
39a18c60 | 3534 | if (v[0] == '\0') { |
b17c9620 LP |
3535 | /* New-style serialized job */ |
3536 | r = unit_deserialize_job(u, f); | |
3537 | if (r < 0) | |
e0209d83 | 3538 | return r; |
b17c9620 | 3539 | } else /* Legacy for pre-44 */ |
ed10fa8c | 3540 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); |
cca098b0 | 3541 | continue; |
a483fb59 | 3542 | } else if (streq(l, "state-change-timestamp")) { |
d68c645b | 3543 | (void) deserialize_dual_timestamp(v, &u->state_change_timestamp); |
a483fb59 | 3544 | continue; |
8aaf019b | 3545 | } else if (streq(l, "inactive-exit-timestamp")) { |
d68c645b | 3546 | (void) deserialize_dual_timestamp(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
3547 | continue; |
3548 | } else if (streq(l, "active-enter-timestamp")) { | |
d68c645b | 3549 | (void) deserialize_dual_timestamp(v, &u->active_enter_timestamp); |
8aaf019b LP |
3550 | continue; |
3551 | } else if (streq(l, "active-exit-timestamp")) { | |
d68c645b | 3552 | (void) deserialize_dual_timestamp(v, &u->active_exit_timestamp); |
8aaf019b LP |
3553 | continue; |
3554 | } else if (streq(l, "inactive-enter-timestamp")) { | |
d68c645b | 3555 | (void) deserialize_dual_timestamp(v, &u->inactive_enter_timestamp); |
8aaf019b | 3556 | continue; |
2791a8f8 | 3557 | } else if (streq(l, "condition-timestamp")) { |
d68c645b | 3558 | (void) deserialize_dual_timestamp(v, &u->condition_timestamp); |
2791a8f8 | 3559 | continue; |
59fccdc5 | 3560 | } else if (streq(l, "assert-timestamp")) { |
d68c645b | 3561 | (void) deserialize_dual_timestamp(v, &u->assert_timestamp); |
59fccdc5 | 3562 | continue; |
2791a8f8 | 3563 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 3564 | |
e911de99 LP |
3565 | r = parse_boolean(v); |
3566 | if (r < 0) | |
f2341e0a | 3567 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 3568 | else |
e911de99 | 3569 | u->condition_result = r; |
efbac6d2 LP |
3570 | |
3571 | continue; | |
c2756a68 | 3572 | |
59fccdc5 | 3573 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 3574 | |
e911de99 LP |
3575 | r = parse_boolean(v); |
3576 | if (r < 0) | |
f2341e0a | 3577 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 3578 | else |
e911de99 | 3579 | u->assert_result = r; |
59fccdc5 LP |
3580 | |
3581 | continue; | |
3582 | ||
c2756a68 | 3583 | } else if (streq(l, "transient")) { |
c2756a68 | 3584 | |
e911de99 LP |
3585 | r = parse_boolean(v); |
3586 | if (r < 0) | |
f2341e0a | 3587 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 3588 | else |
e911de99 | 3589 | u->transient = r; |
c2756a68 LP |
3590 | |
3591 | continue; | |
e911de99 | 3592 | |
0e699122 LP |
3593 | } else if (streq(l, "in-audit")) { |
3594 | ||
3595 | r = parse_boolean(v); | |
3596 | if (r < 0) | |
3597 | log_unit_debug(u, "Failed to parse in-audit bool %s, ignoring.", v); | |
3598 | else | |
3599 | u->in_audit = r; | |
3600 | ||
3601 | continue; | |
3602 | ||
d3070fbd LP |
3603 | } else if (streq(l, "exported-invocation-id")) { |
3604 | ||
3605 | r = parse_boolean(v); | |
3606 | if (r < 0) | |
3607 | log_unit_debug(u, "Failed to parse exported invocation ID bool %s, ignoring.", v); | |
3608 | else | |
3609 | u->exported_invocation_id = r; | |
3610 | ||
3611 | continue; | |
3612 | ||
3613 | } else if (streq(l, "exported-log-level-max")) { | |
3614 | ||
3615 | r = parse_boolean(v); | |
3616 | if (r < 0) | |
3617 | log_unit_debug(u, "Failed to parse exported log level max bool %s, ignoring.", v); | |
3618 | else | |
3619 | u->exported_log_level_max = r; | |
3620 | ||
3621 | continue; | |
3622 | ||
3623 | } else if (streq(l, "exported-log-extra-fields")) { | |
3624 | ||
3625 | r = parse_boolean(v); | |
3626 | if (r < 0) | |
3627 | log_unit_debug(u, "Failed to parse exported log extra fields bool %s, ignoring.", v); | |
3628 | else | |
3629 | u->exported_log_extra_fields = r; | |
3630 | ||
3631 | continue; | |
3632 | ||
90fc172e AZ |
3633 | } else if (streq(l, "exported-log-rate-limit-interval")) { |
3634 | ||
3635 | r = parse_boolean(v); | |
3636 | if (r < 0) | |
3637 | log_unit_debug(u, "Failed to parse exported log rate limit interval %s, ignoring.", v); | |
3638 | else | |
5ac1530e | 3639 | u->exported_log_ratelimit_interval = r; |
90fc172e AZ |
3640 | |
3641 | continue; | |
3642 | ||
3643 | } else if (streq(l, "exported-log-rate-limit-burst")) { | |
3644 | ||
3645 | r = parse_boolean(v); | |
3646 | if (r < 0) | |
3647 | log_unit_debug(u, "Failed to parse exported log rate limit burst %s, ignoring.", v); | |
3648 | else | |
5ac1530e | 3649 | u->exported_log_ratelimit_burst = r; |
90fc172e AZ |
3650 | |
3651 | continue; | |
3652 | ||
fe700f46 | 3653 | } else if (STR_IN_SET(l, "cpu-usage-base", "cpuacct-usage-base")) { |
5ad096b3 | 3654 | |
66ebf6c0 | 3655 | r = safe_atou64(v, &u->cpu_usage_base); |
5ad096b3 | 3656 | if (r < 0) |
fe700f46 LP |
3657 | log_unit_debug(u, "Failed to parse CPU usage base %s, ignoring.", v); |
3658 | ||
3659 | continue; | |
3660 | ||
3661 | } else if (streq(l, "cpu-usage-last")) { | |
3662 | ||
3663 | r = safe_atou64(v, &u->cpu_usage_last); | |
3664 | if (r < 0) | |
3665 | log_unit_debug(u, "Failed to read CPU usage last %s, ignoring.", v); | |
5ad096b3 | 3666 | |
0f908397 | 3667 | continue; |
4e595329 | 3668 | |
afcfaa69 LP |
3669 | } else if (streq(l, "oom-kill-last")) { |
3670 | ||
3671 | r = safe_atou64(v, &u->oom_kill_last); | |
3672 | if (r < 0) | |
3673 | log_unit_debug(u, "Failed to read OOM kill last %s, ignoring.", v); | |
3674 | ||
3675 | continue; | |
3676 | ||
e911de99 | 3677 | } else if (streq(l, "cgroup")) { |
72673e86 | 3678 | |
e911de99 LP |
3679 | r = unit_set_cgroup_path(u, v); |
3680 | if (r < 0) | |
f2341e0a | 3681 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 3682 | |
efdb0237 | 3683 | (void) unit_watch_cgroup(u); |
afcfaa69 | 3684 | (void) unit_watch_cgroup_memory(u); |
efdb0237 | 3685 | |
de1d4f9b WF |
3686 | continue; |
3687 | } else if (streq(l, "cgroup-realized")) { | |
3688 | int b; | |
3689 | ||
3690 | b = parse_boolean(v); | |
3691 | if (b < 0) | |
3692 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
3693 | else | |
3694 | u->cgroup_realized = b; | |
3695 | ||
c2756a68 | 3696 | continue; |
00d9ef85 | 3697 | |
8b108bd0 FB |
3698 | } else if (streq(l, "cgroup-realized-mask")) { |
3699 | ||
3700 | r = cg_mask_from_string(v, &u->cgroup_realized_mask); | |
3701 | if (r < 0) | |
3702 | log_unit_debug(u, "Failed to parse cgroup-realized-mask %s, ignoring.", v); | |
3703 | continue; | |
3704 | ||
3705 | } else if (streq(l, "cgroup-enabled-mask")) { | |
3706 | ||
3707 | r = cg_mask_from_string(v, &u->cgroup_enabled_mask); | |
3708 | if (r < 0) | |
3709 | log_unit_debug(u, "Failed to parse cgroup-enabled-mask %s, ignoring.", v); | |
3710 | continue; | |
3711 | ||
17f14955 | 3712 | } else if (streq(l, "cgroup-invalidated-mask")) { |
906c06f6 | 3713 | |
17f14955 | 3714 | r = cg_mask_from_string(v, &u->cgroup_invalidated_mask); |
906c06f6 | 3715 | if (r < 0) |
17f14955 | 3716 | log_unit_debug(u, "Failed to parse cgroup-invalidated-mask %s, ignoring.", v); |
906c06f6 DM |
3717 | continue; |
3718 | ||
00d9ef85 LP |
3719 | } else if (streq(l, "ref-uid")) { |
3720 | uid_t uid; | |
3721 | ||
3722 | r = parse_uid(v, &uid); | |
3723 | if (r < 0) | |
3724 | log_unit_debug(u, "Failed to parse referenced UID %s, ignoring.", v); | |
3725 | else | |
3726 | unit_ref_uid_gid(u, uid, GID_INVALID); | |
3727 | ||
3728 | continue; | |
3729 | ||
3730 | } else if (streq(l, "ref-gid")) { | |
3731 | gid_t gid; | |
3732 | ||
3733 | r = parse_gid(v, &gid); | |
3734 | if (r < 0) | |
3735 | log_unit_debug(u, "Failed to parse referenced GID %s, ignoring.", v); | |
3736 | else | |
3737 | unit_ref_uid_gid(u, UID_INVALID, gid); | |
3738 | ||
5f616d5f LP |
3739 | continue; |
3740 | ||
05a98afd LP |
3741 | } else if (streq(l, "ref")) { |
3742 | ||
3743 | r = strv_extend(&u->deserialized_refs, v); | |
3744 | if (r < 0) | |
d68c645b | 3745 | return log_oom(); |
05a98afd | 3746 | |
4b58153d LP |
3747 | continue; |
3748 | } else if (streq(l, "invocation-id")) { | |
3749 | sd_id128_t id; | |
3750 | ||
3751 | r = sd_id128_from_string(v, &id); | |
3752 | if (r < 0) | |
3753 | log_unit_debug(u, "Failed to parse invocation id %s, ignoring.", v); | |
3754 | else { | |
3755 | r = unit_set_invocation_id(u, id); | |
3756 | if (r < 0) | |
3757 | log_unit_warning_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
3758 | } | |
3759 | ||
00d9ef85 | 3760 | continue; |
8aaf019b | 3761 | } |
cca098b0 | 3762 | |
6b659ed8 | 3763 | /* Check if this is an IP accounting metric serialization field */ |
83f18c91 LP |
3764 | m = string_table_lookup(ip_accounting_metric_field, ELEMENTSOF(ip_accounting_metric_field), l); |
3765 | if (m >= 0) { | |
6b659ed8 LP |
3766 | uint64_t c; |
3767 | ||
3768 | r = safe_atou64(v, &c); | |
3769 | if (r < 0) | |
3770 | log_unit_debug(u, "Failed to parse IP accounting value %s, ignoring.", v); | |
3771 | else | |
3772 | u->ip_accounting_extra[m] = c; | |
3773 | continue; | |
3774 | } | |
3775 | ||
fbe14fc9 LP |
3776 | m = string_table_lookup(io_accounting_metric_field_base, ELEMENTSOF(io_accounting_metric_field_base), l); |
3777 | if (m >= 0) { | |
3778 | uint64_t c; | |
3779 | ||
3780 | r = safe_atou64(v, &c); | |
3781 | if (r < 0) | |
3782 | log_unit_debug(u, "Failed to parse IO accounting base value %s, ignoring.", v); | |
3783 | else | |
3784 | u->io_accounting_base[m] = c; | |
3785 | continue; | |
3786 | } | |
3787 | ||
3788 | m = string_table_lookup(io_accounting_metric_field_last, ELEMENTSOF(io_accounting_metric_field_last), l); | |
3789 | if (m >= 0) { | |
3790 | uint64_t c; | |
3791 | ||
3792 | r = safe_atou64(v, &c); | |
3793 | if (r < 0) | |
3794 | log_unit_debug(u, "Failed to parse IO accounting last value %s, ignoring.", v); | |
3795 | else | |
3796 | u->io_accounting_last[m] = c; | |
3797 | continue; | |
3798 | } | |
3799 | ||
9bdb98c5 | 3800 | if (unit_can_serialize(u)) { |
e8a565cb YW |
3801 | r = exec_runtime_deserialize_compat(u, l, v, fds); |
3802 | if (r < 0) { | |
3803 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); | |
3804 | continue; | |
9bdb98c5 LP |
3805 | } |
3806 | ||
e8a565cb YW |
3807 | /* Returns positive if key was handled by the call */ |
3808 | if (r > 0) | |
3809 | continue; | |
3810 | ||
9bdb98c5 | 3811 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); |
613b411c | 3812 | if (r < 0) |
f2341e0a | 3813 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 3814 | } |
a16e1123 | 3815 | } |
a483fb59 LP |
3816 | |
3817 | /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is | |
3818 | * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from | |
1f133e0d | 3819 | * before 228 where the base for timeouts was not persistent across reboots. */ |
a483fb59 LP |
3820 | |
3821 | if (!dual_timestamp_is_set(&u->state_change_timestamp)) | |
3822 | dual_timestamp_get(&u->state_change_timestamp); | |
3823 | ||
58d83430 LP |
3824 | /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied |
3825 | * after we are done. For that we invalidate anything already realized, so that we can realize it again. */ | |
3826 | unit_invalidate_cgroup(u, _CGROUP_MASK_ALL); | |
3827 | unit_invalidate_cgroup_bpf(u); | |
3828 | ||
a483fb59 | 3829 | return 0; |
a16e1123 LP |
3830 | } |
3831 | ||
8948b341 LP |
3832 | int unit_deserialize_skip(FILE *f) { |
3833 | int r; | |
07429866 ZJS |
3834 | assert(f); |
3835 | ||
3836 | /* Skip serialized data for this unit. We don't know what it is. */ | |
3837 | ||
3838 | for (;;) { | |
8948b341 LP |
3839 | _cleanup_free_ char *line = NULL; |
3840 | char *l; | |
07429866 | 3841 | |
8948b341 LP |
3842 | r = read_line(f, LONG_LINE_MAX, &line); |
3843 | if (r < 0) | |
3844 | return log_error_errno(r, "Failed to read serialization line: %m"); | |
3845 | if (r == 0) | |
3846 | return 0; | |
07429866 | 3847 | |
07429866 ZJS |
3848 | l = strstrip(line); |
3849 | ||
3850 | /* End marker */ | |
3851 | if (isempty(l)) | |
8948b341 | 3852 | return 1; |
07429866 ZJS |
3853 | } |
3854 | } | |
3855 | ||
eef85c4a | 3856 | int unit_add_node_dependency(Unit *u, const char *what, bool wants, UnitDependency dep, UnitDependencyMask mask) { |
6e2ef85b | 3857 | Unit *device; |
68eda4bd | 3858 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
3859 | int r; |
3860 | ||
3861 | assert(u); | |
3862 | ||
6e2ef85b | 3863 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3864 | if (isempty(what)) |
3865 | return 0; | |
6e2ef85b | 3866 | |
8407a5d0 | 3867 | if (!is_device_path(what)) |
6e2ef85b LP |
3868 | return 0; |
3869 | ||
47bc12e1 LP |
3870 | /* When device units aren't supported (such as in a |
3871 | * container), don't create dependencies on them. */ | |
1c2e9646 | 3872 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3873 | return 0; |
3874 | ||
7410616c LP |
3875 | r = unit_name_from_path(what, ".device", &e); |
3876 | if (r < 0) | |
3877 | return r; | |
6e2ef85b | 3878 | |
ac155bb8 | 3879 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3880 | if (r < 0) |
3881 | return r; | |
3882 | ||
ebc8968b FB |
3883 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3884 | dep = UNIT_BINDS_TO; | |
3885 | ||
9d06297e | 3886 | r = unit_add_two_dependencies(u, UNIT_AFTER, |
463d0d15 | 3887 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, |
eef85c4a | 3888 | device, true, mask); |
faa368e3 | 3889 | if (r < 0) |
6e2ef85b LP |
3890 | return r; |
3891 | ||
faa368e3 | 3892 | if (wants) { |
eef85c4a | 3893 | r = unit_add_dependency(device, UNIT_WANTS, u, false, mask); |
faa368e3 | 3894 | if (r < 0) |
6e2ef85b | 3895 | return r; |
faa368e3 | 3896 | } |
6e2ef85b LP |
3897 | |
3898 | return 0; | |
3899 | } | |
a16e1123 | 3900 | |
be847e82 | 3901 | int unit_coldplug(Unit *u) { |
05a98afd LP |
3902 | int r = 0, q; |
3903 | char **i; | |
b49e14d5 | 3904 | Job *uj; |
cca098b0 LP |
3905 | |
3906 | assert(u); | |
3907 | ||
f0831ed2 | 3908 | /* Make sure we don't enter a loop, when coldplugging recursively. */ |
f78f265f LP |
3909 | if (u->coldplugged) |
3910 | return 0; | |
3911 | ||
3912 | u->coldplugged = true; | |
3913 | ||
05a98afd LP |
3914 | STRV_FOREACH(i, u->deserialized_refs) { |
3915 | q = bus_unit_track_add_name(u, *i); | |
3916 | if (q < 0 && r >= 0) | |
3917 | r = q; | |
3918 | } | |
3919 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 3920 | |
05a98afd LP |
3921 | if (UNIT_VTABLE(u)->coldplug) { |
3922 | q = UNIT_VTABLE(u)->coldplug(u); | |
3923 | if (q < 0 && r >= 0) | |
3924 | r = q; | |
3925 | } | |
5a6158b6 | 3926 | |
b49e14d5 | 3927 | uj = u->job ?: u->nop_job; |
3928 | if (uj) { | |
3929 | q = job_coldplug(uj); | |
05a98afd LP |
3930 | if (q < 0 && r >= 0) |
3931 | r = q; | |
3932 | } | |
cca098b0 | 3933 | |
05a98afd | 3934 | return r; |
cca098b0 LP |
3935 | } |
3936 | ||
f0831ed2 LP |
3937 | void unit_catchup(Unit *u) { |
3938 | assert(u); | |
3939 | ||
3940 | if (UNIT_VTABLE(u)->catchup) | |
3941 | UNIT_VTABLE(u)->catchup(u); | |
3942 | } | |
3943 | ||
ba25d39e | 3944 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3945 | struct stat st; |
3946 | ||
3947 | if (!path) | |
3948 | return false; | |
3949 | ||
77969722 LP |
3950 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3951 | * are never out-of-date. */ | |
3952 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3953 | return false; | |
3954 | ||
21b95806 ZJS |
3955 | if (stat(path, &st) < 0) |
3956 | /* What, cannot access this anymore? */ | |
3957 | return true; | |
3958 | ||
ba25d39e ZJS |
3959 | if (path_masked) |
3960 | /* For masked files check if they are still so */ | |
3961 | return !null_or_empty(&st); | |
3962 | else | |
3a8db9fe | 3963 | /* For non-empty files check the mtime */ |
87ec20ef | 3964 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3965 | |
3966 | return false; | |
3967 | } | |
3968 | ||
45fb0699 | 3969 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
3970 | _cleanup_strv_free_ char **t = NULL; |
3971 | char **path; | |
1b64d026 | 3972 | |
45fb0699 LP |
3973 | assert(u); |
3974 | ||
ba25d39e ZJS |
3975 | /* For unit files, we allow masking… */ |
3976 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3977 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3978 | return true; |
5f4b19f4 | 3979 | |
ba25d39e ZJS |
3980 | /* Source paths should not be masked… */ |
3981 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3982 | return true; |
ae7a7182 | 3983 | |
19a44dfe LR |
3984 | if (u->load_state == UNIT_LOADED) |
3985 | (void) unit_find_dropin_paths(u, &t); | |
ab932a62 LP |
3986 | if (!strv_equal(u->dropin_paths, t)) |
3987 | return true; | |
6d10d308 | 3988 | |
ba25d39e | 3989 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3990 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3991 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3992 | return true; |
21b95806 | 3993 | |
ab932a62 | 3994 | return false; |
45fb0699 LP |
3995 | } |
3996 | ||
fdf20a31 | 3997 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3998 | assert(u); |
3999 | ||
fdf20a31 MM |
4000 | if (UNIT_VTABLE(u)->reset_failed) |
4001 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 | 4002 | |
7bf081a1 | 4003 | ratelimit_reset(&u->start_ratelimit); |
6bf0f408 | 4004 | u->start_limit_hit = false; |
5632e374 LP |
4005 | } |
4006 | ||
a7f241db LP |
4007 | Unit *unit_following(Unit *u) { |
4008 | assert(u); | |
4009 | ||
4010 | if (UNIT_VTABLE(u)->following) | |
4011 | return UNIT_VTABLE(u)->following(u); | |
4012 | ||
4013 | return NULL; | |
4014 | } | |
4015 | ||
31afa0a4 | 4016 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
4017 | assert(u); |
4018 | ||
31afa0a4 LP |
4019 | /* This call does check the current state of the unit. It's |
4020 | * hence useful to be called from state change calls of the | |
4021 | * unit itself, where the state isn't updated yet. This is | |
4022 | * different from unit_inactive_or_pending() which checks both | |
4023 | * the current state and for a queued job. */ | |
18ffdfda | 4024 | |
31afa0a4 LP |
4025 | return u->job && u->job->type == JOB_STOP; |
4026 | } | |
4027 | ||
4028 | bool unit_inactive_or_pending(Unit *u) { | |
4029 | assert(u); | |
4030 | ||
4031 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 4032 | |
d956ac29 LP |
4033 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
4034 | return true; | |
4035 | ||
31afa0a4 | 4036 | if (unit_stop_pending(u)) |
18ffdfda LP |
4037 | return true; |
4038 | ||
4039 | return false; | |
4040 | } | |
4041 | ||
31afa0a4 | 4042 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
4043 | assert(u); |
4044 | ||
f60c2665 | 4045 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
4046 | |
4047 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
4048 | return true; | |
4049 | ||
ac155bb8 | 4050 | if (u->job && |
3742095b | 4051 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
4052 | return true; |
4053 | ||
4054 | return false; | |
4055 | } | |
4056 | ||
52a12341 YW |
4057 | bool unit_will_restart_default(Unit *u) { |
4058 | assert(u); | |
4059 | ||
4060 | if (!u->job) | |
4061 | return false; | |
4062 | if (u->job->type == JOB_START) | |
4063 | return true; | |
4064 | ||
4065 | return false; | |
4066 | } | |
4067 | ||
deb4e708 MK |
4068 | bool unit_will_restart(Unit *u) { |
4069 | assert(u); | |
4070 | ||
4071 | if (!UNIT_VTABLE(u)->will_restart) | |
4072 | return false; | |
4073 | ||
4074 | return UNIT_VTABLE(u)->will_restart(u); | |
4075 | } | |
4076 | ||
718db961 | 4077 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
4078 | assert(u); |
4079 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 4080 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 4081 | |
8a0867d6 | 4082 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 4083 | return -EOPNOTSUPP; |
8a0867d6 | 4084 | |
c74f17d9 | 4085 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
4086 | } |
4087 | ||
82659fd7 | 4088 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
af4fa99d | 4089 | _cleanup_set_free_ Set *pid_set = NULL; |
82659fd7 LP |
4090 | int r; |
4091 | ||
d5099efc | 4092 | pid_set = set_new(NULL); |
82659fd7 LP |
4093 | if (!pid_set) |
4094 | return NULL; | |
4095 | ||
4096 | /* Exclude the main/control pids from being killed via the cgroup */ | |
4097 | if (main_pid > 0) { | |
fea72cc0 | 4098 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 | 4099 | if (r < 0) |
95f14a3e | 4100 | return NULL; |
82659fd7 LP |
4101 | } |
4102 | ||
4103 | if (control_pid > 0) { | |
fea72cc0 | 4104 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 | 4105 | if (r < 0) |
95f14a3e | 4106 | return NULL; |
82659fd7 LP |
4107 | } |
4108 | ||
95f14a3e | 4109 | return TAKE_PTR(pid_set); |
82659fd7 LP |
4110 | } |
4111 | ||
d91c34f2 LP |
4112 | int unit_kill_common( |
4113 | Unit *u, | |
4114 | KillWho who, | |
4115 | int signo, | |
4116 | pid_t main_pid, | |
4117 | pid_t control_pid, | |
718db961 | 4118 | sd_bus_error *error) { |
d91c34f2 | 4119 | |
814cc562 | 4120 | int r = 0; |
ac5e3a50 | 4121 | bool killed = false; |
814cc562 | 4122 | |
ac5e3a50 | 4123 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 4124 | if (main_pid < 0) |
7358dc02 | 4125 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 4126 | else if (main_pid == 0) |
7358dc02 | 4127 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
4128 | } |
4129 | ||
ac5e3a50 | 4130 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 4131 | if (control_pid < 0) |
7358dc02 | 4132 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 4133 | else if (control_pid == 0) |
7358dc02 | 4134 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
4135 | } |
4136 | ||
ac5e3a50 JS |
4137 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
4138 | if (control_pid > 0) { | |
814cc562 MS |
4139 | if (kill(control_pid, signo) < 0) |
4140 | r = -errno; | |
ac5e3a50 JS |
4141 | else |
4142 | killed = true; | |
4143 | } | |
814cc562 | 4144 | |
ac5e3a50 JS |
4145 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
4146 | if (main_pid > 0) { | |
814cc562 MS |
4147 | if (kill(main_pid, signo) < 0) |
4148 | r = -errno; | |
ac5e3a50 JS |
4149 | else |
4150 | killed = true; | |
4151 | } | |
814cc562 | 4152 | |
ac5e3a50 | 4153 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
4154 | _cleanup_set_free_ Set *pid_set = NULL; |
4155 | int q; | |
4156 | ||
82659fd7 LP |
4157 | /* Exclude the main/control pids from being killed via the cgroup */ |
4158 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
4159 | if (!pid_set) |
4160 | return -ENOMEM; | |
4161 | ||
1d98fef1 | 4162 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, NULL, NULL); |
4c701096 | 4163 | if (q < 0 && !IN_SET(q, -EAGAIN, -ESRCH, -ENOENT)) |
814cc562 | 4164 | r = q; |
ac5e3a50 JS |
4165 | else |
4166 | killed = true; | |
814cc562 MS |
4167 | } |
4168 | ||
201f0c91 | 4169 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL)) |
ac5e3a50 JS |
4170 | return -ESRCH; |
4171 | ||
814cc562 MS |
4172 | return r; |
4173 | } | |
4174 | ||
6210e7fc LP |
4175 | int unit_following_set(Unit *u, Set **s) { |
4176 | assert(u); | |
4177 | assert(s); | |
4178 | ||
4179 | if (UNIT_VTABLE(u)->following_set) | |
4180 | return UNIT_VTABLE(u)->following_set(u, s); | |
4181 | ||
4182 | *s = NULL; | |
4183 | return 0; | |
4184 | } | |
4185 | ||
a4375746 | 4186 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
4187 | int r; |
4188 | ||
a4375746 LP |
4189 | assert(u); |
4190 | ||
0ec0deaa LP |
4191 | if (u->unit_file_state < 0 && u->fragment_path) { |
4192 | r = unit_file_get_state( | |
463d0d15 | 4193 | u->manager->unit_file_scope, |
0ec0deaa | 4194 | NULL, |
9ea3a0e7 | 4195 | u->id, |
0ec0deaa LP |
4196 | &u->unit_file_state); |
4197 | if (r < 0) | |
4198 | u->unit_file_state = UNIT_FILE_BAD; | |
4199 | } | |
a4375746 | 4200 | |
ac155bb8 | 4201 | return u->unit_file_state; |
a4375746 LP |
4202 | } |
4203 | ||
d2dc52db LP |
4204 | int unit_get_unit_file_preset(Unit *u) { |
4205 | assert(u); | |
4206 | ||
4207 | if (u->unit_file_preset < 0 && u->fragment_path) | |
4208 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 4209 | u->manager->unit_file_scope, |
0ec0deaa LP |
4210 | NULL, |
4211 | basename(u->fragment_path)); | |
d2dc52db LP |
4212 | |
4213 | return u->unit_file_preset; | |
4214 | } | |
4215 | ||
7f7d01ed | 4216 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 4217 | assert(ref); |
7f7d01ed ZJS |
4218 | assert(source); |
4219 | assert(target); | |
57020a3a | 4220 | |
7f7d01ed | 4221 | if (ref->target) |
57020a3a LP |
4222 | unit_ref_unset(ref); |
4223 | ||
7f7d01ed ZJS |
4224 | ref->source = source; |
4225 | ref->target = target; | |
4226 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
4227 | return target; | |
57020a3a LP |
4228 | } |
4229 | ||
4230 | void unit_ref_unset(UnitRef *ref) { | |
4231 | assert(ref); | |
4232 | ||
7f7d01ed | 4233 | if (!ref->target) |
57020a3a LP |
4234 | return; |
4235 | ||
b75102e5 LP |
4236 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
4237 | * be unreferenced now. */ | |
7f7d01ed | 4238 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 4239 | |
7f7d01ed ZJS |
4240 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
4241 | ref->source = ref->target = NULL; | |
57020a3a LP |
4242 | } |
4243 | ||
29206d46 LP |
4244 | static int user_from_unit_name(Unit *u, char **ret) { |
4245 | ||
4246 | static const uint8_t hash_key[] = { | |
4247 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
4248 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
4249 | }; | |
4250 | ||
4251 | _cleanup_free_ char *n = NULL; | |
4252 | int r; | |
4253 | ||
4254 | r = unit_name_to_prefix(u->id, &n); | |
4255 | if (r < 0) | |
4256 | return r; | |
4257 | ||
4258 | if (valid_user_group_name(n)) { | |
ae2a15bc | 4259 | *ret = TAKE_PTR(n); |
29206d46 LP |
4260 | return 0; |
4261 | } | |
4262 | ||
4263 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
4264 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
4265 | return -ENOMEM; | |
4266 | ||
4267 | return 0; | |
4268 | } | |
4269 | ||
598459ce LP |
4270 | int unit_patch_contexts(Unit *u) { |
4271 | CGroupContext *cc; | |
4272 | ExecContext *ec; | |
cba6e062 LP |
4273 | unsigned i; |
4274 | int r; | |
4275 | ||
e06c73cc | 4276 | assert(u); |
e06c73cc | 4277 | |
598459ce LP |
4278 | /* Patch in the manager defaults into the exec and cgroup |
4279 | * contexts, _after_ the rest of the settings have been | |
4280 | * initialized */ | |
085afe36 | 4281 | |
598459ce LP |
4282 | ec = unit_get_exec_context(u); |
4283 | if (ec) { | |
4284 | /* This only copies in the ones that need memory */ | |
4285 | for (i = 0; i < _RLIMIT_MAX; i++) | |
4286 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
4287 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
4288 | if (!ec->rlimit[i]) | |
4289 | return -ENOMEM; | |
4290 | } | |
4291 | ||
463d0d15 | 4292 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4293 | !ec->working_directory) { |
4294 | ||
4295 | r = get_home_dir(&ec->working_directory); | |
4296 | if (r < 0) | |
4297 | return r; | |
4c08c824 LP |
4298 | |
4299 | /* Allow user services to run, even if the | |
4300 | * home directory is missing */ | |
4301 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4302 | } |
4303 | ||
598459ce | 4304 | if (ec->private_devices) |
2cd0a735 | 4305 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4306 | |
4307 | if (ec->protect_kernel_modules) | |
4308 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 LP |
4309 | |
4310 | if (ec->dynamic_user) { | |
4311 | if (!ec->user) { | |
4312 | r = user_from_unit_name(u, &ec->user); | |
4313 | if (r < 0) | |
4314 | return r; | |
4315 | } | |
4316 | ||
4317 | if (!ec->group) { | |
4318 | ec->group = strdup(ec->user); | |
4319 | if (!ec->group) | |
4320 | return -ENOMEM; | |
4321 | } | |
4322 | ||
bf65b7e0 LP |
4323 | /* If the dynamic user option is on, let's make sure that the unit can't leave its |
4324 | * UID/GID around in the file system or on IPC objects. Hence enforce a strict | |
4325 | * sandbox. */ | |
63bb64a0 | 4326 | |
29206d46 | 4327 | ec->private_tmp = true; |
00d9ef85 | 4328 | ec->remove_ipc = true; |
63bb64a0 LP |
4329 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4330 | if (ec->protect_home == PROTECT_HOME_NO) | |
4331 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
bf65b7e0 LP |
4332 | |
4333 | /* Make sure this service can neither benefit from SUID/SGID binaries nor create | |
4334 | * them. */ | |
4335 | ec->no_new_privileges = true; | |
4336 | ec->restrict_suid_sgid = true; | |
29206d46 | 4337 | } |
cba6e062 LP |
4338 | } |
4339 | ||
598459ce | 4340 | cc = unit_get_cgroup_context(u); |
fe65e88b | 4341 | if (cc && ec) { |
f513e420 | 4342 | |
fe65e88b | 4343 | if (ec->private_devices && |
598459ce LP |
4344 | cc->device_policy == CGROUP_AUTO) |
4345 | cc->device_policy = CGROUP_CLOSED; | |
fe65e88b YW |
4346 | |
4347 | if (ec->root_image && | |
4348 | (cc->device_policy != CGROUP_AUTO || cc->device_allow)) { | |
4349 | ||
4350 | /* When RootImage= is specified, the following devices are touched. */ | |
4351 | r = cgroup_add_device_allow(cc, "/dev/loop-control", "rw"); | |
4352 | if (r < 0) | |
4353 | return r; | |
4354 | ||
4355 | r = cgroup_add_device_allow(cc, "block-loop", "rwm"); | |
4356 | if (r < 0) | |
4357 | return r; | |
4358 | ||
4359 | r = cgroup_add_device_allow(cc, "block-blkext", "rwm"); | |
4360 | if (r < 0) | |
4361 | return r; | |
4362 | } | |
598459ce | 4363 | } |
f1660f96 | 4364 | |
cba6e062 | 4365 | return 0; |
e06c73cc LP |
4366 | } |
4367 | ||
3ef63c31 LP |
4368 | ExecContext *unit_get_exec_context(Unit *u) { |
4369 | size_t offset; | |
4370 | assert(u); | |
4371 | ||
598459ce LP |
4372 | if (u->type < 0) |
4373 | return NULL; | |
4374 | ||
3ef63c31 LP |
4375 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4376 | if (offset <= 0) | |
4377 | return NULL; | |
4378 | ||
4379 | return (ExecContext*) ((uint8_t*) u + offset); | |
4380 | } | |
4381 | ||
718db961 LP |
4382 | KillContext *unit_get_kill_context(Unit *u) { |
4383 | size_t offset; | |
4384 | assert(u); | |
4385 | ||
598459ce LP |
4386 | if (u->type < 0) |
4387 | return NULL; | |
4388 | ||
718db961 LP |
4389 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4390 | if (offset <= 0) | |
4391 | return NULL; | |
4392 | ||
4393 | return (KillContext*) ((uint8_t*) u + offset); | |
4394 | } | |
4395 | ||
4ad49000 LP |
4396 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4397 | size_t offset; | |
4398 | ||
598459ce LP |
4399 | if (u->type < 0) |
4400 | return NULL; | |
4401 | ||
4ad49000 LP |
4402 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4403 | if (offset <= 0) | |
4404 | return NULL; | |
4405 | ||
4406 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4407 | } | |
4408 | ||
613b411c LP |
4409 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4410 | size_t offset; | |
4411 | ||
598459ce LP |
4412 | if (u->type < 0) |
4413 | return NULL; | |
4414 | ||
613b411c LP |
4415 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4416 | if (offset <= 0) | |
4417 | return NULL; | |
4418 | ||
4419 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4420 | } | |
4421 | ||
2e59b241 | 4422 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4423 | assert(u); |
4424 | ||
2e59b241 | 4425 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4426 | return NULL; |
4427 | ||
39591351 LP |
4428 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4429 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4430 | |
2e59b241 | 4431 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4432 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4433 | |
2e59b241 LP |
4434 | if (flags & UNIT_RUNTIME) |
4435 | return u->manager->lookup_paths.runtime_control; | |
4436 | ||
39591351 | 4437 | return NULL; |
71645aca LP |
4438 | } |
4439 | ||
2e59b241 LP |
4440 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4441 | char *ret = NULL; | |
4442 | ||
4443 | if (!s) | |
4444 | return NULL; | |
4445 | ||
4446 | /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated | |
4447 | * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is | |
4448 | * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly | |
4449 | * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is | |
4450 | * not specified, then the return value always needs to be freed. Callers can use this to optimize memory | |
4451 | * allocations. */ | |
4452 | ||
4453 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
4454 | ret = specifier_escape(s); | |
4455 | if (!ret) | |
4456 | return NULL; | |
4457 | ||
4458 | s = ret; | |
4459 | } | |
4460 | ||
4461 | if (flags & UNIT_ESCAPE_C) { | |
4462 | char *a; | |
4463 | ||
4464 | a = cescape(s); | |
4465 | free(ret); | |
4466 | if (!a) | |
4467 | return NULL; | |
4468 | ||
4469 | ret = a; | |
4470 | } | |
4471 | ||
4472 | if (buf) { | |
4473 | *buf = ret; | |
4474 | return ret ?: (char*) s; | |
4475 | } | |
4476 | ||
4477 | return ret ?: strdup(s); | |
4478 | } | |
4479 | ||
4480 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4481 | _cleanup_free_ char *result = NULL; | |
4482 | size_t n = 0, allocated = 0; | |
ae2a15bc | 4483 | char **i; |
2e59b241 LP |
4484 | |
4485 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a | |
4486 | * way suitable for ExecStart= stanzas */ | |
4487 | ||
4488 | STRV_FOREACH(i, l) { | |
4489 | _cleanup_free_ char *buf = NULL; | |
4490 | const char *p; | |
4491 | size_t a; | |
4492 | char *q; | |
4493 | ||
4494 | p = unit_escape_setting(*i, flags, &buf); | |
4495 | if (!p) | |
4496 | return NULL; | |
4497 | ||
4498 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
4499 | if (!GREEDY_REALLOC(result, allocated, n + a + 1)) | |
4500 | return NULL; | |
4501 | ||
4502 | q = result + n; | |
4503 | if (n > 0) | |
4504 | *(q++) = ' '; | |
4505 | ||
4506 | *(q++) = '"'; | |
4507 | q = stpcpy(q, p); | |
4508 | *(q++) = '"'; | |
4509 | ||
4510 | n += a; | |
4511 | } | |
4512 | ||
4513 | if (!GREEDY_REALLOC(result, allocated, n + 1)) | |
4514 | return NULL; | |
4515 | ||
4516 | result[n] = 0; | |
4517 | ||
ae2a15bc | 4518 | return TAKE_PTR(result); |
2e59b241 LP |
4519 | } |
4520 | ||
4521 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4522 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4523 | const char *dir, *wrapped; |
26d04f86 | 4524 | int r; |
71645aca LP |
4525 | |
4526 | assert(u); | |
2e59b241 LP |
4527 | assert(name); |
4528 | assert(data); | |
4529 | ||
4530 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4531 | return 0; | |
4532 | ||
4533 | data = unit_escape_setting(data, flags, &escaped); | |
4534 | if (!data) | |
4535 | return -ENOMEM; | |
4536 | ||
4537 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4538 | * previous section header is the same */ | |
4539 | ||
4540 | if (flags & UNIT_PRIVATE) { | |
4541 | if (!UNIT_VTABLE(u)->private_section) | |
4542 | return -EINVAL; | |
4543 | ||
4544 | if (!u->transient_file || u->last_section_private < 0) | |
4545 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4546 | else if (u->last_section_private == 0) | |
4547 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4548 | } else { | |
4549 | if (!u->transient_file || u->last_section_private < 0) | |
4550 | data = strjoina("[Unit]\n", data); | |
4551 | else if (u->last_section_private > 0) | |
4552 | data = strjoina("\n[Unit]\n", data); | |
4553 | } | |
71645aca | 4554 | |
4f4afc88 LP |
4555 | if (u->transient_file) { |
4556 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4557 | * write to the transient unit file. */ | |
4558 | fputs(data, u->transient_file); | |
4f4afc88 | 4559 | |
2e59b241 LP |
4560 | if (!endswith(data, "\n")) |
4561 | fputc('\n', u->transient_file); | |
4562 | ||
4563 | /* Remember which section we wrote this entry to */ | |
4564 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4565 | return 0; |
2e59b241 | 4566 | } |
8e2af478 | 4567 | |
2e59b241 | 4568 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4569 | if (!dir) |
4570 | return -EINVAL; | |
71645aca | 4571 | |
2a9a6f8a | 4572 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4573 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4574 | data, |
4575 | "\n"); | |
e20b2a86 | 4576 | |
815b09d3 | 4577 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4578 | if (r < 0) |
4579 | return r; | |
4580 | ||
45639f1b | 4581 | (void) mkdir_p_label(p, 0755); |
4dba44a5 ZJS |
4582 | |
4583 | /* Make sure the drop-in dir is registered in our path cache. This way we don't need to stupidly | |
4584 | * recreate the cache after every drop-in we write. */ | |
4585 | if (u->manager->unit_path_cache) { | |
4586 | r = set_put_strdup(u->manager->unit_path_cache, p); | |
4587 | if (r < 0) | |
4588 | return r; | |
4589 | } | |
4590 | ||
2a9a6f8a | 4591 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4592 | if (r < 0) |
4593 | return r; | |
4594 | ||
815b09d3 | 4595 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4596 | if (r < 0) |
4597 | return r; | |
815b09d3 | 4598 | q = NULL; |
adb76a70 | 4599 | |
adb76a70 WC |
4600 | strv_uniq(u->dropin_paths); |
4601 | ||
4602 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4603 | ||
4604 | return 0; | |
26d04f86 | 4605 | } |
71645aca | 4606 | |
2e59b241 | 4607 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4608 | _cleanup_free_ char *p = NULL; |
4609 | va_list ap; | |
4610 | int r; | |
4611 | ||
4612 | assert(u); | |
4613 | assert(name); | |
4614 | assert(format); | |
4615 | ||
2e59b241 | 4616 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4617 | return 0; |
4618 | ||
4619 | va_start(ap, format); | |
4620 | r = vasprintf(&p, format, ap); | |
4621 | va_end(ap); | |
4622 | ||
4623 | if (r < 0) | |
4624 | return -ENOMEM; | |
4625 | ||
2e59b241 | 4626 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4627 | } |
71645aca | 4628 | |
c2756a68 | 4629 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4630 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4631 | FILE *f; |
4f4afc88 | 4632 | |
c2756a68 LP |
4633 | assert(u); |
4634 | ||
3f5e8115 LP |
4635 | if (!UNIT_VTABLE(u)->can_transient) |
4636 | return -EOPNOTSUPP; | |
4637 | ||
45639f1b LP |
4638 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4639 | ||
657ee2d8 | 4640 | path = path_join(u->manager->lookup_paths.transient, u->id); |
4f4afc88 LP |
4641 | if (!path) |
4642 | return -ENOMEM; | |
4643 | ||
4644 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4645 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4646 | ||
78e334b5 | 4647 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 4648 | f = fopen(path, "we"); |
0126c8f3 | 4649 | if (!f) |
78e334b5 | 4650 | return -errno; |
4f4afc88 LP |
4651 | } |
4652 | ||
0126c8f3 | 4653 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4654 | u->transient_file = f; |
4655 | ||
0126c8f3 | 4656 | free_and_replace(u->fragment_path, path); |
7c65093a | 4657 | |
7c65093a LP |
4658 | u->source_path = mfree(u->source_path); |
4659 | u->dropin_paths = strv_free(u->dropin_paths); | |
4660 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4661 | ||
4f4afc88 LP |
4662 | u->load_state = UNIT_STUB; |
4663 | u->load_error = 0; | |
4664 | u->transient = true; | |
4665 | ||
7c65093a LP |
4666 | unit_add_to_dbus_queue(u); |
4667 | unit_add_to_gc_queue(u); | |
c2756a68 | 4668 | |
4f4afc88 LP |
4669 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4670 | u->transient_file); | |
4671 | ||
3f5e8115 | 4672 | return 0; |
c2756a68 LP |
4673 | } |
4674 | ||
c53d2d54 | 4675 | static int log_kill(pid_t pid, int sig, void *userdata) { |
1d98fef1 LP |
4676 | _cleanup_free_ char *comm = NULL; |
4677 | ||
4678 | (void) get_process_comm(pid, &comm); | |
4679 | ||
4680 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4681 | only, like for example systemd's own PAM stub process. */ | |
4682 | if (comm && comm[0] == '(') | |
c53d2d54 | 4683 | return 0; |
1d98fef1 LP |
4684 | |
4685 | log_unit_notice(userdata, | |
4686 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4687 | pid, | |
4688 | strna(comm), | |
4689 | signal_to_string(sig)); | |
c53d2d54 DB |
4690 | |
4691 | return 1; | |
1d98fef1 LP |
4692 | } |
4693 | ||
4694 | static int operation_to_signal(KillContext *c, KillOperation k) { | |
4695 | assert(c); | |
4696 | ||
4697 | switch (k) { | |
4698 | ||
4699 | case KILL_TERMINATE: | |
4700 | case KILL_TERMINATE_AND_LOG: | |
4701 | return c->kill_signal; | |
4702 | ||
4703 | case KILL_KILL: | |
fbb48d4c | 4704 | return c->final_kill_signal; |
1d98fef1 | 4705 | |
c87700a1 AZ |
4706 | case KILL_WATCHDOG: |
4707 | return c->watchdog_signal; | |
1d98fef1 LP |
4708 | |
4709 | default: | |
4710 | assert_not_reached("KillOperation unknown"); | |
4711 | } | |
4712 | } | |
4713 | ||
cd2086fe LP |
4714 | int unit_kill_context( |
4715 | Unit *u, | |
4716 | KillContext *c, | |
db2cb23b | 4717 | KillOperation k, |
cd2086fe LP |
4718 | pid_t main_pid, |
4719 | pid_t control_pid, | |
4720 | bool main_pid_alien) { | |
4721 | ||
1d98fef1 | 4722 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4723 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4724 | int sig, r; |
cd2086fe LP |
4725 | |
4726 | assert(u); | |
4727 | assert(c); | |
4728 | ||
59ec09a8 ZJS |
4729 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. |
4730 | * Returns > 0 if we killed something worth waiting for, 0 otherwise. */ | |
1d98fef1 | 4731 | |
cd2086fe LP |
4732 | if (c->kill_mode == KILL_NONE) |
4733 | return 0; | |
4734 | ||
1d98fef1 LP |
4735 | sig = operation_to_signal(c, k); |
4736 | ||
4737 | send_sighup = | |
4738 | c->send_sighup && | |
4739 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4740 | sig != SIGHUP; | |
4741 | ||
59ec09a8 ZJS |
4742 | if (k != KILL_TERMINATE || IN_SET(sig, SIGKILL, SIGABRT)) |
4743 | log_func = log_kill; | |
cd2086fe LP |
4744 | |
4745 | if (main_pid > 0) { | |
1d98fef1 LP |
4746 | if (log_func) |
4747 | log_func(main_pid, sig, u); | |
cd2086fe | 4748 | |
1d98fef1 | 4749 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4750 | if (r < 0 && r != -ESRCH) { |
4751 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4752 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 4753 | |
b821a397 | 4754 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 4755 | } else { |
bc6aed7b LP |
4756 | if (!main_pid_alien) |
4757 | wait_for_exit = true; | |
82659fd7 | 4758 | |
1d98fef1 | 4759 | if (r != -ESRCH && send_sighup) |
d0667321 | 4760 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 4761 | } |
cd2086fe LP |
4762 | } |
4763 | ||
4764 | if (control_pid > 0) { | |
1d98fef1 LP |
4765 | if (log_func) |
4766 | log_func(control_pid, sig, u); | |
cd2086fe | 4767 | |
1d98fef1 | 4768 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4769 | if (r < 0 && r != -ESRCH) { |
4770 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4771 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 4772 | |
b821a397 | 4773 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 4774 | } else { |
cd2086fe | 4775 | wait_for_exit = true; |
82659fd7 | 4776 | |
1d98fef1 | 4777 | if (r != -ESRCH && send_sighup) |
d0667321 | 4778 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 4779 | } |
cd2086fe LP |
4780 | } |
4781 | ||
b821a397 LP |
4782 | if (u->cgroup_path && |
4783 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4784 | _cleanup_set_free_ Set *pid_set = NULL; |
4785 | ||
82659fd7 LP |
4786 | /* Exclude the main/control pids from being killed via the cgroup */ |
4787 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4788 | if (!pid_set) |
4789 | return -ENOMEM; | |
4790 | ||
1d98fef1 LP |
4791 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4792 | sig, | |
4793 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4794 | pid_set, | |
4795 | log_func, u); | |
cd2086fe | 4796 | if (r < 0) { |
4c701096 | 4797 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
b821a397 LP |
4798 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
4799 | ||
82659fd7 | 4800 | } else if (r > 0) { |
bc6aed7b | 4801 | |
1d9cc876 LP |
4802 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4803 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
4804 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
4805 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
4806 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
4807 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 4808 | |
c22800e4 | 4809 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 4810 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 4811 | wait_for_exit = true; |
58ea275a | 4812 | |
1d98fef1 | 4813 | if (send_sighup) { |
82659fd7 LP |
4814 | set_free(pid_set); |
4815 | ||
4816 | pid_set = unit_pid_set(main_pid, control_pid); | |
4817 | if (!pid_set) | |
4818 | return -ENOMEM; | |
4819 | ||
1d98fef1 LP |
4820 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4821 | SIGHUP, | |
4822 | CGROUP_IGNORE_SELF, | |
4823 | pid_set, | |
4824 | NULL, NULL); | |
82659fd7 LP |
4825 | } |
4826 | } | |
cd2086fe LP |
4827 | } |
4828 | ||
4829 | return wait_for_exit; | |
4830 | } | |
4831 | ||
eef85c4a | 4832 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
ca8700e9 | 4833 | _cleanup_free_ char *p = NULL; |
eef85c4a | 4834 | UnitDependencyInfo di; |
a57f7e2c LP |
4835 | int r; |
4836 | ||
4837 | assert(u); | |
4838 | assert(path); | |
4839 | ||
eef85c4a LP |
4840 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in |
4841 | * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to | |
4842 | * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily | |
4843 | * determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4844 | |
70b64bd3 ZJS |
4845 | if (!path_is_absolute(path)) |
4846 | return -EINVAL; | |
4847 | ||
548f6937 | 4848 | r = hashmap_ensure_allocated(&u->requires_mounts_for, &path_hash_ops); |
eef85c4a LP |
4849 | if (r < 0) |
4850 | return r; | |
4851 | ||
a57f7e2c LP |
4852 | p = strdup(path); |
4853 | if (!p) | |
4854 | return -ENOMEM; | |
4855 | ||
106bf8e4 | 4856 | path = path_simplify(p, true); |
a57f7e2c | 4857 | |
ca8700e9 | 4858 | if (!path_is_normalized(path)) |
a57f7e2c | 4859 | return -EPERM; |
a57f7e2c | 4860 | |
ca8700e9 | 4861 | if (hashmap_contains(u->requires_mounts_for, path)) |
a57f7e2c | 4862 | return 0; |
a57f7e2c | 4863 | |
eef85c4a LP |
4864 | di = (UnitDependencyInfo) { |
4865 | .origin_mask = mask | |
4866 | }; | |
4867 | ||
ca8700e9 ZJS |
4868 | r = hashmap_put(u->requires_mounts_for, path, di.data); |
4869 | if (r < 0) | |
a57f7e2c | 4870 | return r; |
ca8700e9 | 4871 | p = NULL; |
a57f7e2c | 4872 | |
4cb06c59 | 4873 | char prefix[strlen(path) + 1]; |
ca8700e9 | 4874 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
a57f7e2c LP |
4875 | Set *x; |
4876 | ||
4877 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4878 | if (!x) { | |
ca8700e9 | 4879 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 4880 | |
548f6937 | 4881 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
742f41ad LP |
4882 | if (r < 0) |
4883 | return r; | |
a57f7e2c LP |
4884 | |
4885 | q = strdup(prefix); | |
4886 | if (!q) | |
4887 | return -ENOMEM; | |
4888 | ||
d5099efc | 4889 | x = set_new(NULL); |
ca8700e9 | 4890 | if (!x) |
a57f7e2c | 4891 | return -ENOMEM; |
a57f7e2c LP |
4892 | |
4893 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4894 | if (r < 0) { | |
a57f7e2c LP |
4895 | set_free(x); |
4896 | return r; | |
4897 | } | |
ca8700e9 | 4898 | q = NULL; |
a57f7e2c LP |
4899 | } |
4900 | ||
4901 | r = set_put(x, u); | |
4902 | if (r < 0) | |
4903 | return r; | |
4904 | } | |
4905 | ||
4906 | return 0; | |
4907 | } | |
4908 | ||
613b411c LP |
4909 | int unit_setup_exec_runtime(Unit *u) { |
4910 | ExecRuntime **rt; | |
4911 | size_t offset; | |
613b411c | 4912 | Unit *other; |
eef85c4a LP |
4913 | Iterator i; |
4914 | void *v; | |
e8a565cb | 4915 | int r; |
613b411c LP |
4916 | |
4917 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4918 | assert(offset > 0); | |
4919 | ||
06b643e7 | 4920 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
4921 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
4922 | if (*rt) | |
4923 | return 0; | |
4924 | ||
4925 | /* Try to get it from somebody else */ | |
eef85c4a | 4926 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { |
e8a565cb YW |
4927 | r = exec_runtime_acquire(u->manager, NULL, other->id, false, rt); |
4928 | if (r == 1) | |
4929 | return 1; | |
613b411c LP |
4930 | } |
4931 | ||
e8a565cb | 4932 | return exec_runtime_acquire(u->manager, unit_get_exec_context(u), u->id, true, rt); |
613b411c LP |
4933 | } |
4934 | ||
29206d46 LP |
4935 | int unit_setup_dynamic_creds(Unit *u) { |
4936 | ExecContext *ec; | |
4937 | DynamicCreds *dcreds; | |
4938 | size_t offset; | |
4939 | ||
4940 | assert(u); | |
4941 | ||
4942 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
4943 | assert(offset > 0); | |
4944 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
4945 | ||
4946 | ec = unit_get_exec_context(u); | |
4947 | assert(ec); | |
4948 | ||
4949 | if (!ec->dynamic_user) | |
4950 | return 0; | |
4951 | ||
4952 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
4953 | } | |
4954 | ||
1c2e9646 LP |
4955 | bool unit_type_supported(UnitType t) { |
4956 | if (_unlikely_(t < 0)) | |
4957 | return false; | |
4958 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
4959 | return false; | |
4960 | ||
4961 | if (!unit_vtable[t]->supported) | |
4962 | return true; | |
4963 | ||
4964 | return unit_vtable[t]->supported(); | |
4965 | } | |
4966 | ||
8b4305c7 LP |
4967 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
4968 | int r; | |
4969 | ||
4970 | assert(u); | |
4971 | assert(where); | |
4972 | ||
4973 | r = dir_is_empty(where); | |
3f602115 | 4974 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
4975 | return; |
4976 | if (r < 0) { | |
4977 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
4978 | return; | |
4979 | } | |
4980 | ||
4981 | log_struct(LOG_NOTICE, | |
2b044526 | 4982 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4983 | LOG_UNIT_ID(u), |
f1c50bec | 4984 | LOG_UNIT_INVOCATION_ID(u), |
8b4305c7 | 4985 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), |
a1230ff9 | 4986 | "WHERE=%s", where); |
8b4305c7 LP |
4987 | } |
4988 | ||
25cd4964 | 4989 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
58d9d89b | 4990 | _cleanup_free_ char *canonical_where = NULL; |
8b4305c7 LP |
4991 | int r; |
4992 | ||
4993 | assert(u); | |
4994 | assert(where); | |
4995 | ||
25cd4964 | 4996 | r = chase_symlinks(where, NULL, CHASE_NONEXISTENT, &canonical_where); |
8b4305c7 | 4997 | if (r < 0) { |
25cd4964 | 4998 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
4999 | return 0; |
5000 | } | |
25cd4964 AJ |
5001 | |
5002 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
5003 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
5004 | return 0; |
5005 | ||
25cd4964 | 5006 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
8b4305c7 | 5007 | log_struct(LOG_ERR, |
2b044526 | 5008 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 5009 | LOG_UNIT_ID(u), |
f1c50bec | 5010 | LOG_UNIT_INVOCATION_ID(u), |
25cd4964 | 5011 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), |
a1230ff9 | 5012 | "WHERE=%s", where); |
8b4305c7 LP |
5013 | |
5014 | return -ELOOP; | |
5015 | } | |
0f13f3bd LP |
5016 | |
5017 | bool unit_is_pristine(Unit *u) { | |
5018 | assert(u); | |
5019 | ||
7c65093a | 5020 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
5021 | * in a number of different ways. Note that to cater for unit |
5022 | * types such as slice, we are generally fine with units that | |
e9e8cbc8 ZJS |
5023 | * are marked UNIT_LOADED even though nothing was actually |
5024 | * loaded, as those unit types don't require a file on disk. */ | |
0f13f3bd LP |
5025 | |
5026 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
5027 | u->fragment_path || | |
5028 | u->source_path || | |
5029 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
5030 | u->job || |
5031 | u->merged_into); | |
5032 | } | |
291d565a LP |
5033 | |
5034 | pid_t unit_control_pid(Unit *u) { | |
5035 | assert(u); | |
5036 | ||
5037 | if (UNIT_VTABLE(u)->control_pid) | |
5038 | return UNIT_VTABLE(u)->control_pid(u); | |
5039 | ||
5040 | return 0; | |
5041 | } | |
5042 | ||
5043 | pid_t unit_main_pid(Unit *u) { | |
5044 | assert(u); | |
5045 | ||
5046 | if (UNIT_VTABLE(u)->main_pid) | |
5047 | return UNIT_VTABLE(u)->main_pid(u); | |
5048 | ||
5049 | return 0; | |
5050 | } | |
00d9ef85 LP |
5051 | |
5052 | static void unit_unref_uid_internal( | |
5053 | Unit *u, | |
5054 | uid_t *ref_uid, | |
5055 | bool destroy_now, | |
5056 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
5057 | ||
5058 | assert(u); | |
5059 | assert(ref_uid); | |
5060 | assert(_manager_unref_uid); | |
5061 | ||
5062 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
5063 | * gid_t are actually the same time, with the same validity rules. | |
5064 | * | |
5065 | * Drops a reference to UID/GID from a unit. */ | |
5066 | ||
5067 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
5068 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
5069 | ||
5070 | if (!uid_is_valid(*ref_uid)) | |
5071 | return; | |
5072 | ||
5073 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
5074 | *ref_uid = UID_INVALID; | |
5075 | } | |
5076 | ||
5077 | void unit_unref_uid(Unit *u, bool destroy_now) { | |
5078 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); | |
5079 | } | |
5080 | ||
5081 | void unit_unref_gid(Unit *u, bool destroy_now) { | |
5082 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); | |
5083 | } | |
5084 | ||
5085 | static int unit_ref_uid_internal( | |
5086 | Unit *u, | |
5087 | uid_t *ref_uid, | |
5088 | uid_t uid, | |
5089 | bool clean_ipc, | |
5090 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
5091 | ||
5092 | int r; | |
5093 | ||
5094 | assert(u); | |
5095 | assert(ref_uid); | |
5096 | assert(uid_is_valid(uid)); | |
5097 | assert(_manager_ref_uid); | |
5098 | ||
5099 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
5100 | * are actually the same type, and have the same validity rules. | |
5101 | * | |
5102 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
5103 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
5104 | * drops to zero. */ | |
5105 | ||
5106 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
5107 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
5108 | ||
5109 | if (*ref_uid == uid) | |
5110 | return 0; | |
5111 | ||
5112 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
5113 | return -EBUSY; | |
5114 | ||
5115 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
5116 | if (r < 0) | |
5117 | return r; | |
5118 | ||
5119 | *ref_uid = uid; | |
5120 | return 1; | |
5121 | } | |
5122 | ||
5123 | int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { | |
5124 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); | |
5125 | } | |
5126 | ||
5127 | int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { | |
5128 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); | |
5129 | } | |
5130 | ||
5131 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
5132 | int r = 0, q = 0; | |
5133 | ||
5134 | assert(u); | |
5135 | ||
5136 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
5137 | ||
5138 | if (uid_is_valid(uid)) { | |
5139 | r = unit_ref_uid(u, uid, clean_ipc); | |
5140 | if (r < 0) | |
5141 | return r; | |
5142 | } | |
5143 | ||
5144 | if (gid_is_valid(gid)) { | |
5145 | q = unit_ref_gid(u, gid, clean_ipc); | |
5146 | if (q < 0) { | |
5147 | if (r > 0) | |
5148 | unit_unref_uid(u, false); | |
5149 | ||
5150 | return q; | |
5151 | } | |
5152 | } | |
5153 | ||
5154 | return r > 0 || q > 0; | |
5155 | } | |
5156 | ||
5157 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
5158 | ExecContext *c; | |
5159 | int r; | |
5160 | ||
5161 | assert(u); | |
5162 | ||
5163 | c = unit_get_exec_context(u); | |
5164 | ||
5165 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
5166 | if (r < 0) | |
5167 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
5168 | ||
5169 | return r; | |
5170 | } | |
5171 | ||
5172 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { | |
5173 | assert(u); | |
5174 | ||
5175 | unit_unref_uid(u, destroy_now); | |
5176 | unit_unref_gid(u, destroy_now); | |
5177 | } | |
5178 | ||
5179 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { | |
5180 | int r; | |
5181 | ||
5182 | assert(u); | |
5183 | ||
5184 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
5185 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
5186 | * objects when no service references the UID/GID anymore. */ | |
5187 | ||
5188 | r = unit_ref_uid_gid(u, uid, gid); | |
5189 | if (r > 0) | |
37d0b962 | 5190 | unit_add_to_dbus_queue(u); |
00d9ef85 | 5191 | } |
4b58153d LP |
5192 | |
5193 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { | |
5194 | int r; | |
5195 | ||
5196 | assert(u); | |
5197 | ||
5198 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
5199 | ||
5200 | if (sd_id128_equal(u->invocation_id, id)) | |
5201 | return 0; | |
5202 | ||
5203 | if (!sd_id128_is_null(u->invocation_id)) | |
5204 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
5205 | ||
5206 | if (sd_id128_is_null(id)) { | |
5207 | r = 0; | |
5208 | goto reset; | |
5209 | } | |
5210 | ||
5211 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
5212 | if (r < 0) | |
5213 | goto reset; | |
5214 | ||
5215 | u->invocation_id = id; | |
5216 | sd_id128_to_string(id, u->invocation_id_string); | |
5217 | ||
5218 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
5219 | if (r < 0) | |
5220 | goto reset; | |
5221 | ||
5222 | return 0; | |
5223 | ||
5224 | reset: | |
5225 | u->invocation_id = SD_ID128_NULL; | |
5226 | u->invocation_id_string[0] = 0; | |
5227 | return r; | |
5228 | } | |
5229 | ||
5230 | int unit_acquire_invocation_id(Unit *u) { | |
5231 | sd_id128_t id; | |
5232 | int r; | |
5233 | ||
5234 | assert(u); | |
5235 | ||
5236 | r = sd_id128_randomize(&id); | |
5237 | if (r < 0) | |
5238 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
5239 | ||
5240 | r = unit_set_invocation_id(u, id); | |
5241 | if (r < 0) | |
5242 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
5243 | ||
af92c603 | 5244 | unit_add_to_dbus_queue(u); |
4b58153d LP |
5245 | return 0; |
5246 | } | |
f0d47797 | 5247 | |
1ad6e8b3 LP |
5248 | int unit_set_exec_params(Unit *u, ExecParameters *p) { |
5249 | int r; | |
5250 | ||
7960b0c7 LP |
5251 | assert(u); |
5252 | assert(p); | |
f0d47797 | 5253 | |
004c7f16 | 5254 | /* Copy parameters from manager */ |
1ad6e8b3 LP |
5255 | r = manager_get_effective_environment(u->manager, &p->environment); |
5256 | if (r < 0) | |
5257 | return r; | |
5258 | ||
004c7f16 LP |
5259 | p->confirm_spawn = manager_get_confirm_spawn(u->manager); |
5260 | p->cgroup_supported = u->manager->cgroup_supported; | |
5261 | p->prefix = u->manager->prefix; | |
5262 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
5263 | ||
5238e957 | 5264 | /* Copy parameters from unit */ |
7960b0c7 | 5265 | p->cgroup_path = u->cgroup_path; |
1d9cc876 | 5266 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
1ad6e8b3 LP |
5267 | |
5268 | return 0; | |
f0d47797 | 5269 | } |
a79279c7 | 5270 | |
4c253ed1 | 5271 | int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) { |
a79279c7 LP |
5272 | int r; |
5273 | ||
5274 | assert(u); | |
5275 | assert(ret); | |
5276 | ||
5277 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
5278 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
5279 | ||
5280 | (void) unit_realize_cgroup(u); | |
5281 | ||
4c253ed1 LP |
5282 | r = safe_fork(name, FORK_REOPEN_LOG, ret); |
5283 | if (r != 0) | |
5284 | return r; | |
a79279c7 | 5285 | |
4c253ed1 LP |
5286 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); |
5287 | (void) ignore_signals(SIGPIPE, -1); | |
a79279c7 | 5288 | |
4c253ed1 | 5289 | (void) prctl(PR_SET_PDEATHSIG, SIGTERM); |
a79279c7 | 5290 | |
4c253ed1 LP |
5291 | if (u->cgroup_path) { |
5292 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
5293 | if (r < 0) { | |
5294 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", u->cgroup_path); | |
5295 | _exit(EXIT_CGROUP); | |
a79279c7 | 5296 | } |
a79279c7 LP |
5297 | } |
5298 | ||
4c253ed1 | 5299 | return 0; |
a79279c7 | 5300 | } |
c999cf38 | 5301 | |
810ef318 YW |
5302 | int unit_fork_and_watch_rm_rf(Unit *u, char **paths, pid_t *ret_pid) { |
5303 | pid_t pid; | |
5304 | int r; | |
5305 | ||
5306 | assert(u); | |
5307 | assert(ret_pid); | |
5308 | ||
5309 | r = unit_fork_helper_process(u, "(sd-rmrf)", &pid); | |
5310 | if (r < 0) | |
5311 | return r; | |
5312 | if (r == 0) { | |
5313 | int ret = EXIT_SUCCESS; | |
5314 | char **i; | |
5315 | ||
5316 | STRV_FOREACH(i, paths) { | |
5317 | r = rm_rf(*i, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_MISSING_OK); | |
5318 | if (r < 0) { | |
5319 | log_error_errno(r, "Failed to remove '%s': %m", *i); | |
5320 | ret = EXIT_FAILURE; | |
5321 | } | |
5322 | } | |
5323 | ||
5324 | _exit(ret); | |
5325 | } | |
5326 | ||
5327 | r = unit_watch_pid(u, pid, true); | |
5328 | if (r < 0) | |
5329 | return r; | |
5330 | ||
5331 | *ret_pid = pid; | |
5332 | return 0; | |
5333 | } | |
5334 | ||
c999cf38 LP |
5335 | static void unit_update_dependency_mask(Unit *u, UnitDependency d, Unit *other, UnitDependencyInfo di) { |
5336 | assert(u); | |
5337 | assert(d >= 0); | |
5338 | assert(d < _UNIT_DEPENDENCY_MAX); | |
5339 | assert(other); | |
5340 | ||
5341 | if (di.origin_mask == 0 && di.destination_mask == 0) { | |
5342 | /* No bit set anymore, let's drop the whole entry */ | |
5343 | assert_se(hashmap_remove(u->dependencies[d], other)); | |
5344 | log_unit_debug(u, "%s lost dependency %s=%s", u->id, unit_dependency_to_string(d), other->id); | |
5345 | } else | |
5346 | /* Mask was reduced, let's update the entry */ | |
5347 | assert_se(hashmap_update(u->dependencies[d], other, di.data) == 0); | |
5348 | } | |
5349 | ||
5350 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
5351 | UnitDependency d; | |
5352 | ||
5353 | assert(u); | |
5354 | ||
5355 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5356 | ||
5357 | if (mask == 0) | |
5358 | return; | |
5359 | ||
5360 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
5361 | bool done; | |
5362 | ||
5363 | do { | |
5364 | UnitDependencyInfo di; | |
5365 | Unit *other; | |
5366 | Iterator i; | |
5367 | ||
5368 | done = true; | |
5369 | ||
5370 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { | |
5371 | UnitDependency q; | |
5372 | ||
5373 | if ((di.origin_mask & ~mask) == di.origin_mask) | |
5374 | continue; | |
5375 | di.origin_mask &= ~mask; | |
5376 | unit_update_dependency_mask(u, d, other, di); | |
5377 | ||
5378 | /* We updated the dependency from our unit to the other unit now. But most dependencies | |
5379 | * imply a reverse dependency. Hence, let's delete that one too. For that we go through | |
5380 | * all dependency types on the other unit and delete all those which point to us and | |
5381 | * have the right mask set. */ | |
5382 | ||
5383 | for (q = 0; q < _UNIT_DEPENDENCY_MAX; q++) { | |
5384 | UnitDependencyInfo dj; | |
5385 | ||
5386 | dj.data = hashmap_get(other->dependencies[q], u); | |
5387 | if ((dj.destination_mask & ~mask) == dj.destination_mask) | |
5388 | continue; | |
5389 | dj.destination_mask &= ~mask; | |
5390 | ||
5391 | unit_update_dependency_mask(other, q, u, dj); | |
5392 | } | |
5393 | ||
5394 | unit_add_to_gc_queue(other); | |
5395 | ||
5396 | done = false; | |
5397 | break; | |
5398 | } | |
5399 | ||
5400 | } while (!done); | |
5401 | } | |
5402 | } | |
d3070fbd LP |
5403 | |
5404 | static int unit_export_invocation_id(Unit *u) { | |
5405 | const char *p; | |
5406 | int r; | |
5407 | ||
5408 | assert(u); | |
5409 | ||
5410 | if (u->exported_invocation_id) | |
5411 | return 0; | |
5412 | ||
5413 | if (sd_id128_is_null(u->invocation_id)) | |
5414 | return 0; | |
5415 | ||
5416 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
5417 | r = symlink_atomic(u->invocation_id_string, p); | |
5418 | if (r < 0) | |
5419 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5420 | ||
5421 | u->exported_invocation_id = true; | |
5422 | return 0; | |
5423 | } | |
5424 | ||
5425 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5426 | const char *p; | |
5427 | char buf[2]; | |
5428 | int r; | |
5429 | ||
5430 | assert(u); | |
5431 | assert(c); | |
5432 | ||
5433 | if (u->exported_log_level_max) | |
5434 | return 0; | |
5435 | ||
5436 | if (c->log_level_max < 0) | |
5437 | return 0; | |
5438 | ||
5439 | assert(c->log_level_max <= 7); | |
5440 | ||
5441 | buf[0] = '0' + c->log_level_max; | |
5442 | buf[1] = 0; | |
5443 | ||
5444 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5445 | r = symlink_atomic(buf, p); | |
5446 | if (r < 0) | |
5447 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5448 | ||
5449 | u->exported_log_level_max = true; | |
5450 | return 0; | |
5451 | } | |
5452 | ||
5453 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5454 | _cleanup_close_ int fd = -1; | |
5455 | struct iovec *iovec; | |
5456 | const char *p; | |
5457 | char *pattern; | |
5458 | le64_t *sizes; | |
5459 | ssize_t n; | |
5460 | size_t i; | |
5461 | int r; | |
5462 | ||
5463 | if (u->exported_log_extra_fields) | |
5464 | return 0; | |
5465 | ||
5466 | if (c->n_log_extra_fields <= 0) | |
5467 | return 0; | |
5468 | ||
5469 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5470 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5471 | ||
5472 | for (i = 0; i < c->n_log_extra_fields; i++) { | |
5473 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); | |
5474 | ||
5475 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5476 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5477 | } | |
5478 | ||
5479 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5480 | pattern = strjoina(p, ".XXXXXX"); | |
5481 | ||
5482 | fd = mkostemp_safe(pattern); | |
5483 | if (fd < 0) | |
5484 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5485 | ||
5486 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5487 | if (n < 0) { | |
5488 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5489 | goto fail; | |
5490 | } | |
5491 | ||
5492 | (void) fchmod(fd, 0644); | |
5493 | ||
5494 | if (rename(pattern, p) < 0) { | |
5495 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5496 | goto fail; | |
5497 | } | |
5498 | ||
5499 | u->exported_log_extra_fields = true; | |
5500 | return 0; | |
5501 | ||
5502 | fail: | |
5503 | (void) unlink(pattern); | |
5504 | return r; | |
5505 | } | |
5506 | ||
5ac1530e | 5507 | static int unit_export_log_ratelimit_interval(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5508 | _cleanup_free_ char *buf = NULL; |
5509 | const char *p; | |
5510 | int r; | |
5511 | ||
5512 | assert(u); | |
5513 | assert(c); | |
5514 | ||
5ac1530e | 5515 | if (u->exported_log_ratelimit_interval) |
90fc172e AZ |
5516 | return 0; |
5517 | ||
5ac1530e | 5518 | if (c->log_ratelimit_interval_usec == 0) |
90fc172e AZ |
5519 | return 0; |
5520 | ||
5521 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5522 | ||
5ac1530e | 5523 | if (asprintf(&buf, "%" PRIu64, c->log_ratelimit_interval_usec) < 0) |
90fc172e AZ |
5524 | return log_oom(); |
5525 | ||
5526 | r = symlink_atomic(buf, p); | |
5527 | if (r < 0) | |
5528 | return log_unit_debug_errno(u, r, "Failed to create log rate limit interval symlink %s: %m", p); | |
5529 | ||
5ac1530e | 5530 | u->exported_log_ratelimit_interval = true; |
90fc172e AZ |
5531 | return 0; |
5532 | } | |
5533 | ||
5ac1530e | 5534 | static int unit_export_log_ratelimit_burst(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5535 | _cleanup_free_ char *buf = NULL; |
5536 | const char *p; | |
5537 | int r; | |
5538 | ||
5539 | assert(u); | |
5540 | assert(c); | |
5541 | ||
5ac1530e | 5542 | if (u->exported_log_ratelimit_burst) |
90fc172e AZ |
5543 | return 0; |
5544 | ||
5ac1530e | 5545 | if (c->log_ratelimit_burst == 0) |
90fc172e AZ |
5546 | return 0; |
5547 | ||
5548 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5549 | ||
5ac1530e | 5550 | if (asprintf(&buf, "%u", c->log_ratelimit_burst) < 0) |
90fc172e AZ |
5551 | return log_oom(); |
5552 | ||
5553 | r = symlink_atomic(buf, p); | |
5554 | if (r < 0) | |
5555 | return log_unit_debug_errno(u, r, "Failed to create log rate limit burst symlink %s: %m", p); | |
5556 | ||
5ac1530e | 5557 | u->exported_log_ratelimit_burst = true; |
90fc172e AZ |
5558 | return 0; |
5559 | } | |
5560 | ||
d3070fbd LP |
5561 | void unit_export_state_files(Unit *u) { |
5562 | const ExecContext *c; | |
5563 | ||
5564 | assert(u); | |
5565 | ||
5566 | if (!u->id) | |
5567 | return; | |
5568 | ||
5569 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5570 | return; | |
5571 | ||
638cece4 | 5572 | if (MANAGER_IS_TEST_RUN(u->manager)) |
8f632531 LP |
5573 | return; |
5574 | ||
d3070fbd LP |
5575 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5576 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5577 | * the IPC system itself and PID 1 also log to the journal. | |
5578 | * | |
5579 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5580 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5581 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5582 | * namespace at least. | |
5583 | * | |
5584 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5585 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5586 | * them with one. */ | |
5587 | ||
5588 | (void) unit_export_invocation_id(u); | |
5589 | ||
5590 | c = unit_get_exec_context(u); | |
5591 | if (c) { | |
5592 | (void) unit_export_log_level_max(u, c); | |
5593 | (void) unit_export_log_extra_fields(u, c); | |
5ac1530e ZJS |
5594 | (void) unit_export_log_ratelimit_interval(u, c); |
5595 | (void) unit_export_log_ratelimit_burst(u, c); | |
d3070fbd LP |
5596 | } |
5597 | } | |
5598 | ||
5599 | void unit_unlink_state_files(Unit *u) { | |
5600 | const char *p; | |
5601 | ||
5602 | assert(u); | |
5603 | ||
5604 | if (!u->id) | |
5605 | return; | |
5606 | ||
5607 | if (!MANAGER_IS_SYSTEM(u->manager)) | |
5608 | return; | |
5609 | ||
5610 | /* Undoes the effect of unit_export_state() */ | |
5611 | ||
5612 | if (u->exported_invocation_id) { | |
5613 | p = strjoina("/run/systemd/units/invocation:", u->id); | |
5614 | (void) unlink(p); | |
5615 | ||
5616 | u->exported_invocation_id = false; | |
5617 | } | |
5618 | ||
5619 | if (u->exported_log_level_max) { | |
5620 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5621 | (void) unlink(p); | |
5622 | ||
5623 | u->exported_log_level_max = false; | |
5624 | } | |
5625 | ||
5626 | if (u->exported_log_extra_fields) { | |
5627 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5628 | (void) unlink(p); | |
5629 | ||
5630 | u->exported_log_extra_fields = false; | |
5631 | } | |
90fc172e | 5632 | |
5ac1530e | 5633 | if (u->exported_log_ratelimit_interval) { |
90fc172e AZ |
5634 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); |
5635 | (void) unlink(p); | |
5636 | ||
5ac1530e | 5637 | u->exported_log_ratelimit_interval = false; |
90fc172e AZ |
5638 | } |
5639 | ||
5ac1530e | 5640 | if (u->exported_log_ratelimit_burst) { |
90fc172e AZ |
5641 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); |
5642 | (void) unlink(p); | |
5643 | ||
5ac1530e | 5644 | u->exported_log_ratelimit_burst = false; |
90fc172e | 5645 | } |
d3070fbd | 5646 | } |
5afe510c | 5647 | |
3c7416b6 LP |
5648 | int unit_prepare_exec(Unit *u) { |
5649 | int r; | |
5650 | ||
5651 | assert(u); | |
5652 | ||
fab34748 KL |
5653 | /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable. |
5654 | * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */ | |
5655 | r = bpf_firewall_load_custom(u); | |
5656 | if (r < 0) | |
5657 | return r; | |
5658 | ||
3c7416b6 LP |
5659 | /* Prepares everything so that we can fork of a process for this unit */ |
5660 | ||
5661 | (void) unit_realize_cgroup(u); | |
5662 | ||
5663 | if (u->reset_accounting) { | |
9b2559a1 | 5664 | (void) unit_reset_accounting(u); |
3c7416b6 LP |
5665 | u->reset_accounting = false; |
5666 | } | |
5667 | ||
5668 | unit_export_state_files(u); | |
5669 | ||
5670 | r = unit_setup_exec_runtime(u); | |
5671 | if (r < 0) | |
5672 | return r; | |
5673 | ||
5674 | r = unit_setup_dynamic_creds(u); | |
5675 | if (r < 0) | |
5676 | return r; | |
5677 | ||
5678 | return 0; | |
5679 | } | |
5680 | ||
c53d2d54 | 5681 | static int log_leftover(pid_t pid, int sig, void *userdata) { |
a4634b21 LP |
5682 | _cleanup_free_ char *comm = NULL; |
5683 | ||
5684 | (void) get_process_comm(pid, &comm); | |
5685 | ||
5686 | if (comm && comm[0] == '(') /* Most likely our own helper process (PAM?), ignore */ | |
c53d2d54 | 5687 | return 0; |
a4634b21 LP |
5688 | |
5689 | log_unit_warning(userdata, | |
5690 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5691 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5692 | pid, strna(comm)); | |
c53d2d54 DB |
5693 | |
5694 | return 1; | |
a4634b21 LP |
5695 | } |
5696 | ||
c53d2d54 | 5697 | int unit_warn_leftover_processes(Unit *u) { |
a4634b21 LP |
5698 | assert(u); |
5699 | ||
5700 | (void) unit_pick_cgroup_path(u); | |
5701 | ||
5702 | if (!u->cgroup_path) | |
c53d2d54 | 5703 | return 0; |
a4634b21 | 5704 | |
c53d2d54 | 5705 | return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_leftover, u); |
a4634b21 LP |
5706 | } |
5707 | ||
bb2c7685 LP |
5708 | bool unit_needs_console(Unit *u) { |
5709 | ExecContext *ec; | |
5710 | UnitActiveState state; | |
5711 | ||
5712 | assert(u); | |
5713 | ||
5714 | state = unit_active_state(u); | |
5715 | ||
5716 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5717 | return false; | |
5718 | ||
5719 | if (UNIT_VTABLE(u)->needs_console) | |
5720 | return UNIT_VTABLE(u)->needs_console(u); | |
5721 | ||
5722 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5723 | ec = unit_get_exec_context(u); | |
5724 | if (!ec) | |
5725 | return false; | |
5726 | ||
5727 | return exec_context_may_touch_console(ec); | |
5728 | } | |
5729 | ||
81e9871e LP |
5730 | const char *unit_label_path(Unit *u) { |
5731 | const char *p; | |
5732 | ||
5733 | /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off | |
5734 | * when validating access checks. */ | |
5735 | ||
5736 | p = u->source_path ?: u->fragment_path; | |
5737 | if (!p) | |
5738 | return NULL; | |
5739 | ||
5740 | /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */ | |
5741 | if (path_equal(p, "/dev/null")) | |
5742 | return NULL; | |
5743 | ||
5744 | return p; | |
5745 | } | |
5746 | ||
6592b975 LP |
5747 | int unit_pid_attachable(Unit *u, pid_t pid, sd_bus_error *error) { |
5748 | int r; | |
5749 | ||
5750 | assert(u); | |
5751 | ||
5752 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5753 | * and not a kernel thread either */ | |
5754 | ||
5755 | /* First, a simple range check */ | |
5756 | if (!pid_is_valid(pid)) | |
5757 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier " PID_FMT " is not valid.", pid); | |
5758 | ||
5759 | /* Some extra safety check */ | |
5760 | if (pid == 1 || pid == getpid_cached()) | |
3fe91079 | 5761 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager process, refusing.", pid); |
6592b975 LP |
5762 | |
5763 | /* Don't even begin to bother with kernel threads */ | |
5764 | r = is_kernel_thread(pid); | |
5765 | if (r == -ESRCH) | |
5766 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid); | |
5767 | if (r < 0) | |
5768 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid); | |
5769 | if (r > 0) | |
5770 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid); | |
5771 | ||
5772 | return 0; | |
5773 | } | |
5774 | ||
523ee2d4 LP |
5775 | void unit_log_success(Unit *u) { |
5776 | assert(u); | |
5777 | ||
5778 | log_struct(LOG_INFO, | |
5779 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR, | |
5780 | LOG_UNIT_ID(u), | |
5781 | LOG_UNIT_INVOCATION_ID(u), | |
5782 | LOG_UNIT_MESSAGE(u, "Succeeded.")); | |
5783 | } | |
5784 | ||
7c047d74 LP |
5785 | void unit_log_failure(Unit *u, const char *result) { |
5786 | assert(u); | |
5787 | assert(result); | |
5788 | ||
5789 | log_struct(LOG_WARNING, | |
5790 | "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR, | |
5791 | LOG_UNIT_ID(u), | |
5792 | LOG_UNIT_INVOCATION_ID(u), | |
5793 | LOG_UNIT_MESSAGE(u, "Failed with result '%s'.", result), | |
5794 | "UNIT_RESULT=%s", result); | |
5795 | } | |
5796 | ||
31cd5f63 AZ |
5797 | void unit_log_skip(Unit *u, const char *result) { |
5798 | assert(u); | |
5799 | assert(result); | |
5800 | ||
5801 | log_struct(LOG_INFO, | |
5802 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR, | |
5803 | LOG_UNIT_ID(u), | |
5804 | LOG_UNIT_INVOCATION_ID(u), | |
5805 | LOG_UNIT_MESSAGE(u, "Skipped due to '%s'.", result), | |
5806 | "UNIT_RESULT=%s", result); | |
5807 | } | |
5808 | ||
91bbd9b7 LP |
5809 | void unit_log_process_exit( |
5810 | Unit *u, | |
91bbd9b7 LP |
5811 | const char *kind, |
5812 | const char *command, | |
5cc2cd1c | 5813 | bool success, |
91bbd9b7 LP |
5814 | int code, |
5815 | int status) { | |
5816 | ||
5cc2cd1c ZJS |
5817 | int level; |
5818 | ||
91bbd9b7 LP |
5819 | assert(u); |
5820 | assert(kind); | |
5821 | ||
5cc2cd1c ZJS |
5822 | /* If this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure |
5823 | * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption | |
5824 | * that the service already logged the reason at a higher log level on its own. Otherwise, make it a | |
5825 | * WARNING. */ | |
5826 | if (success) | |
5827 | level = LOG_DEBUG; | |
5828 | else if (code == CLD_EXITED) | |
5829 | level = LOG_NOTICE; | |
5830 | else | |
91bbd9b7 LP |
5831 | level = LOG_WARNING; |
5832 | ||
5833 | log_struct(level, | |
5834 | "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR, | |
5835 | LOG_UNIT_MESSAGE(u, "%s exited, code=%s, status=%i/%s", | |
5836 | kind, | |
5837 | sigchld_code_to_string(code), status, | |
5838 | strna(code == CLD_EXITED | |
5839 | ? exit_status_to_string(status, EXIT_STATUS_FULL) | |
5840 | : signal_to_string(status))), | |
5841 | "EXIT_CODE=%s", sigchld_code_to_string(code), | |
5842 | "EXIT_STATUS=%i", status, | |
5843 | "COMMAND=%s", strna(command), | |
5844 | LOG_UNIT_ID(u), | |
5845 | LOG_UNIT_INVOCATION_ID(u)); | |
5846 | } | |
5847 | ||
7af67e9a LP |
5848 | int unit_exit_status(Unit *u) { |
5849 | assert(u); | |
5850 | ||
5851 | /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range | |
5852 | * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA | |
5853 | * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main | |
5854 | * service process has exited abnormally (signal/coredump). */ | |
5855 | ||
5856 | if (!UNIT_VTABLE(u)->exit_status) | |
5857 | return -EOPNOTSUPP; | |
5858 | ||
5859 | return UNIT_VTABLE(u)->exit_status(u); | |
5860 | } | |
5861 | ||
5862 | int unit_failure_action_exit_status(Unit *u) { | |
5863 | int r; | |
5864 | ||
5865 | assert(u); | |
5866 | ||
5867 | /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */ | |
5868 | ||
5869 | if (u->failure_action_exit_status >= 0) | |
5870 | return u->failure_action_exit_status; | |
5871 | ||
5872 | r = unit_exit_status(u); | |
5873 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5874 | return 255; | |
5875 | ||
5876 | return r; | |
5877 | } | |
5878 | ||
5879 | int unit_success_action_exit_status(Unit *u) { | |
5880 | int r; | |
5881 | ||
5882 | assert(u); | |
5883 | ||
5884 | /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */ | |
5885 | ||
5886 | if (u->success_action_exit_status >= 0) | |
5887 | return u->success_action_exit_status; | |
5888 | ||
5889 | r = unit_exit_status(u); | |
5890 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5891 | return 255; | |
5892 | ||
5893 | return r; | |
5894 | } | |
5895 | ||
a4191c9f LP |
5896 | int unit_test_trigger_loaded(Unit *u) { |
5897 | Unit *trigger; | |
5898 | ||
5899 | /* Tests whether the unit to trigger is loaded */ | |
5900 | ||
5901 | trigger = UNIT_TRIGGER(u); | |
5902 | if (!trigger) | |
e7b9f4d9 ZJS |
5903 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
5904 | "Refusing to start, no unit to trigger."); | |
a4191c9f | 5905 | if (trigger->load_state != UNIT_LOADED) |
e7b9f4d9 ZJS |
5906 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
5907 | "Refusing to start, unit %s to trigger not loaded.", trigger->id); | |
a4191c9f LP |
5908 | |
5909 | return 0; | |
5910 | } | |
5911 | ||
95939aed YW |
5912 | void unit_destroy_runtime_directory(Unit *u, const ExecContext *context) { |
5913 | if (context->runtime_directory_preserve_mode == EXEC_PRESERVE_NO || | |
5914 | (context->runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART && !unit_will_restart(u))) | |
5915 | exec_context_destroy_runtime_directory(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME]); | |
5916 | } | |
5917 | ||
380dc8b0 LP |
5918 | int unit_clean(Unit *u, ExecCleanMask mask) { |
5919 | UnitActiveState state; | |
5920 | ||
5921 | assert(u); | |
5922 | ||
5923 | /* Special return values: | |
5924 | * | |
5925 | * -EOPNOTSUPP → cleaning not supported for this unit type | |
5926 | * -EUNATCH → cleaning not defined for this resource type | |
5927 | * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has | |
5928 | * a job queued or similar | |
5929 | */ | |
5930 | ||
5931 | if (!UNIT_VTABLE(u)->clean) | |
5932 | return -EOPNOTSUPP; | |
5933 | ||
5934 | if (mask == 0) | |
5935 | return -EUNATCH; | |
5936 | ||
5937 | if (u->load_state != UNIT_LOADED) | |
5938 | return -EBUSY; | |
5939 | ||
5940 | if (u->job) | |
5941 | return -EBUSY; | |
5942 | ||
5943 | state = unit_active_state(u); | |
5944 | if (!IN_SET(state, UNIT_INACTIVE)) | |
5945 | return -EBUSY; | |
5946 | ||
5947 | return UNIT_VTABLE(u)->clean(u, mask); | |
5948 | } | |
5949 | ||
5950 | int unit_can_clean(Unit *u, ExecCleanMask *ret) { | |
5951 | assert(u); | |
5952 | ||
5953 | if (!UNIT_VTABLE(u)->clean || | |
5954 | u->load_state != UNIT_LOADED) { | |
5955 | *ret = 0; | |
5956 | return 0; | |
5957 | } | |
5958 | ||
5959 | /* When the clean() method is set, can_clean() really should be set too */ | |
5960 | assert(UNIT_VTABLE(u)->can_clean); | |
5961 | ||
5962 | return UNIT_VTABLE(u)->can_clean(u, ret); | |
5963 | } | |
5964 | ||
5afe510c LP |
5965 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
5966 | [COLLECT_INACTIVE] = "inactive", | |
5967 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
5968 | }; | |
5969 | ||
5970 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); |