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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a7334b09 | 2 | |
87f0e418 | 3 | #include <errno.h> |
0301abf4 | 4 | #include <stdlib.h> |
4c253ed1 | 5 | #include <sys/prctl.h> |
4f5dd394 | 6 | #include <unistd.h> |
87f0e418 | 7 | |
718db961 LP |
8 | #include "sd-id128.h" |
9 | #include "sd-messages.h" | |
4f5dd394 | 10 | |
57b7a260 | 11 | #include "all-units.h" |
d68c645b | 12 | #include "alloc-util.h" |
fab34748 | 13 | #include "bpf-firewall.h" |
4f5dd394 LP |
14 | #include "bus-common-errors.h" |
15 | #include "bus-util.h" | |
fdb3deca | 16 | #include "cgroup-setup.h" |
c6c18be3 | 17 | #include "cgroup-util.h" |
4f5dd394 LP |
18 | #include "dbus-unit.h" |
19 | #include "dbus.h" | |
20 | #include "dropin.h" | |
21 | #include "escape.h" | |
22 | #include "execute.h" | |
6a48d82f | 23 | #include "fd-util.h" |
a5c32cff | 24 | #include "fileio-label.h" |
ee228be1 | 25 | #include "fileio.h" |
f97b34a6 | 26 | #include "format-util.h" |
d3070fbd | 27 | #include "fs-util.h" |
4b58153d | 28 | #include "id128-util.h" |
915b1d01 | 29 | #include "io-util.h" |
5cfa33e0 | 30 | #include "install.h" |
4f5dd394 LP |
31 | #include "load-dropin.h" |
32 | #include "load-fragment.h" | |
33 | #include "log.h" | |
34 | #include "macro.h" | |
f5947a5e | 35 | #include "missing_audit.h" |
4f5dd394 | 36 | #include "mkdir.h" |
6bedfcbb | 37 | #include "parse-util.h" |
4f5dd394 | 38 | #include "path-util.h" |
0b452006 | 39 | #include "process-util.h" |
810ef318 | 40 | #include "rm-rf.h" |
d68c645b | 41 | #include "serialize.h" |
4f5dd394 | 42 | #include "set.h" |
6eb7c172 | 43 | #include "signal-util.h" |
d3070fbd | 44 | #include "sparse-endian.h" |
e9db43d5 | 45 | #include "special.h" |
2e59b241 | 46 | #include "specifier.h" |
8fcde012 | 47 | #include "stat-util.h" |
d054f0a4 | 48 | #include "stdio-util.h" |
5afe510c | 49 | #include "string-table.h" |
07630cea | 50 | #include "string-util.h" |
4f5dd394 | 51 | #include "strv.h" |
5b262f74 | 52 | #include "terminal-util.h" |
e4de7287 | 53 | #include "tmpfile-util.h" |
4f4afc88 | 54 | #include "umask-util.h" |
4f5dd394 | 55 | #include "unit-name.h" |
e9db43d5 | 56 | #include "unit.h" |
b1d4f8e1 LP |
57 | #include "user-util.h" |
58 | #include "virt.h" | |
87f0e418 | 59 | |
37109b85 ZJS |
60 | /* Thresholds for logging at INFO level about resource consumption */ |
61 | #define MENTIONWORTHY_CPU_NSEC (1 * NSEC_PER_SEC) | |
62 | #define MENTIONWORTHY_IO_BYTES (1024 * 1024ULL) | |
63 | #define MENTIONWORTHY_IP_BYTES (0ULL) | |
64 | ||
65 | /* Thresholds for logging at INFO level about resource consumption */ | |
66 | #define NOTICEWORTHY_CPU_NSEC (10*60 * NSEC_PER_SEC) /* 10 minutes */ | |
67 | #define NOTICEWORTHY_IO_BYTES (10 * 1024 * 1024ULL) /* 10 MB */ | |
68 | #define NOTICEWORTHY_IP_BYTES (128 * 1024 * 1024ULL) /* 128 MB */ | |
69 | ||
87f0e418 LP |
70 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { |
71 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 LP |
72 | [UNIT_SOCKET] = &socket_vtable, |
73 | [UNIT_TARGET] = &target_vtable, | |
74 | [UNIT_DEVICE] = &device_vtable, | |
75 | [UNIT_MOUNT] = &mount_vtable, | |
76 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 77 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 78 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 79 | [UNIT_PATH] = &path_vtable, |
6c12b52e | 80 | [UNIT_SLICE] = &slice_vtable, |
5afe510c | 81 | [UNIT_SCOPE] = &scope_vtable, |
87f0e418 LP |
82 | }; |
83 | ||
f2341e0a | 84 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 85 | |
7d17cfbc | 86 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
87 | Unit *u; |
88 | ||
89 | assert(m); | |
ac155bb8 | 90 | assert(size >= sizeof(Unit)); |
87f0e418 | 91 | |
7d17cfbc MS |
92 | u = malloc0(size); |
93 | if (!u) | |
87f0e418 LP |
94 | return NULL; |
95 | ||
d5099efc | 96 | u->names = set_new(&string_hash_ops); |
6b430fdb ZJS |
97 | if (!u->names) |
98 | return mfree(u); | |
87f0e418 | 99 | |
ac155bb8 MS |
100 | u->manager = m; |
101 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
102 | u->default_dependencies = true; |
103 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 104 | u->unit_file_preset = -1; |
d420282b | 105 | u->on_failure_job_mode = JOB_REPLACE; |
0bb814c2 | 106 | u->cgroup_control_inotify_wd = -1; |
afcfaa69 | 107 | u->cgroup_memory_inotify_wd = -1; |
36c16a7c | 108 | u->job_timeout = USEC_INFINITY; |
a2df3ea4 | 109 | u->job_running_timeout = USEC_INFINITY; |
00d9ef85 LP |
110 | u->ref_uid = UID_INVALID; |
111 | u->ref_gid = GID_INVALID; | |
fe700f46 | 112 | u->cpu_usage_last = NSEC_INFINITY; |
17f14955 | 113 | u->cgroup_invalidated_mask |= CGROUP_MASK_BPF_FIREWALL; |
7af67e9a | 114 | u->failure_action_exit_status = u->success_action_exit_status = -1; |
87f0e418 | 115 | |
6a48d82f DM |
116 | u->ip_accounting_ingress_map_fd = -1; |
117 | u->ip_accounting_egress_map_fd = -1; | |
118 | u->ipv4_allow_map_fd = -1; | |
119 | u->ipv6_allow_map_fd = -1; | |
120 | u->ipv4_deny_map_fd = -1; | |
121 | u->ipv6_deny_map_fd = -1; | |
122 | ||
2e59b241 LP |
123 | u->last_section_private = -1; |
124 | ||
7bf081a1 | 125 | u->start_ratelimit = (RateLimit) { m->default_start_limit_interval, m->default_start_limit_burst }; |
8c227e7f | 126 | u->auto_stop_ratelimit = (RateLimit) { 10 * USEC_PER_SEC, 16 }; |
bea355da | 127 | |
fbe14fc9 LP |
128 | for (CGroupIOAccountingMetric i = 0; i < _CGROUP_IO_ACCOUNTING_METRIC_MAX; i++) |
129 | u->io_accounting_last[i] = UINT64_MAX; | |
130 | ||
87f0e418 LP |
131 | return u; |
132 | } | |
133 | ||
a581e45a | 134 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
dc409696 | 135 | _cleanup_(unit_freep) Unit *u = NULL; |
a581e45a LP |
136 | int r; |
137 | ||
138 | u = unit_new(m, size); | |
139 | if (!u) | |
140 | return -ENOMEM; | |
141 | ||
142 | r = unit_add_name(u, name); | |
dc409696 | 143 | if (r < 0) |
a581e45a | 144 | return r; |
a581e45a | 145 | |
1cc6c93a YW |
146 | *ret = TAKE_PTR(u); |
147 | ||
a581e45a LP |
148 | return r; |
149 | } | |
150 | ||
303ee601 | 151 | bool unit_has_name(const Unit *u, const char *name) { |
f278026d LP |
152 | assert(u); |
153 | assert(name); | |
154 | ||
390bc2b1 | 155 | return set_contains(u->names, (char*) name); |
f278026d LP |
156 | } |
157 | ||
598459ce LP |
158 | static void unit_init(Unit *u) { |
159 | CGroupContext *cc; | |
160 | ExecContext *ec; | |
161 | KillContext *kc; | |
162 | ||
163 | assert(u); | |
164 | assert(u->manager); | |
165 | assert(u->type >= 0); | |
166 | ||
167 | cc = unit_get_cgroup_context(u); | |
168 | if (cc) { | |
169 | cgroup_context_init(cc); | |
170 | ||
171 | /* Copy in the manager defaults into the cgroup | |
172 | * context, _before_ the rest of the settings have | |
173 | * been initialized */ | |
174 | ||
175 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
13c31542 | 176 | cc->io_accounting = u->manager->default_io_accounting; |
598459ce LP |
177 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
178 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 179 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
6a48d82f | 180 | cc->ip_accounting = u->manager->default_ip_accounting; |
0af20ea2 LP |
181 | |
182 | if (u->type != UNIT_SLICE) | |
183 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
184 | } |
185 | ||
186 | ec = unit_get_exec_context(u); | |
b1edf445 | 187 | if (ec) { |
598459ce LP |
188 | exec_context_init(ec); |
189 | ||
b1edf445 | 190 | ec->keyring_mode = MANAGER_IS_SYSTEM(u->manager) ? |
00f5ad93 | 191 | EXEC_KEYRING_SHARED : EXEC_KEYRING_INHERIT; |
b1edf445 LP |
192 | } |
193 | ||
598459ce LP |
194 | kc = unit_get_kill_context(u); |
195 | if (kc) | |
196 | kill_context_init(kc); | |
197 | ||
198 | if (UNIT_VTABLE(u)->init) | |
199 | UNIT_VTABLE(u)->init(u); | |
200 | } | |
201 | ||
87f0e418 | 202 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 203 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 204 | UnitType t; |
87f0e418 LP |
205 | int r; |
206 | ||
207 | assert(u); | |
208 | assert(text); | |
209 | ||
7410616c | 210 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 211 | |
ac155bb8 | 212 | if (!u->instance) |
9e2f7c11 | 213 | return -EINVAL; |
87f0e418 | 214 | |
7410616c LP |
215 | r = unit_name_replace_instance(text, u->instance, &s); |
216 | if (r < 0) | |
217 | return r; | |
218 | } else { | |
9e2f7c11 | 219 | s = strdup(text); |
7410616c LP |
220 | if (!s) |
221 | return -ENOMEM; | |
222 | } | |
87f0e418 | 223 | |
7410616c LP |
224 | if (set_contains(u->names, s)) |
225 | return 0; | |
226 | if (hashmap_contains(u->manager->units, s)) | |
227 | return -EEXIST; | |
228 | ||
229 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 230 | return -EINVAL; |
e537352b | 231 | |
7410616c LP |
232 | t = unit_name_to_type(s); |
233 | if (t < 0) | |
234 | return -EINVAL; | |
87f0e418 | 235 | |
598459ce LP |
236 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
237 | return -EINVAL; | |
87f0e418 | 238 | |
e48614c4 ZJS |
239 | r = unit_name_to_instance(s, &i); |
240 | if (r < 0) | |
598459ce | 241 | return r; |
87f0e418 | 242 | |
ce99c68a | 243 | if (i && !unit_type_may_template(t)) |
598459ce | 244 | return -EINVAL; |
9e2f7c11 | 245 | |
276c3e78 | 246 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
247 | * but not both. Note that we do allow names with different |
248 | * instance names however! */ | |
598459ce LP |
249 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
250 | return -EINVAL; | |
9e2f7c11 | 251 | |
8a993b61 | 252 | if (!unit_type_may_alias(t) && !set_isempty(u->names)) |
598459ce | 253 | return -EEXIST; |
9e2f7c11 | 254 | |
598459ce LP |
255 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
256 | return -E2BIG; | |
4f0f902f | 257 | |
e48614c4 | 258 | r = set_put(u->names, s); |
7410616c | 259 | if (r < 0) |
598459ce | 260 | return r; |
7410616c | 261 | assert(r > 0); |
87f0e418 | 262 | |
e48614c4 ZJS |
263 | r = hashmap_put(u->manager->units, s, u); |
264 | if (r < 0) { | |
7410616c | 265 | (void) set_remove(u->names, s); |
598459ce | 266 | return r; |
87f0e418 LP |
267 | } |
268 | ||
ac155bb8 | 269 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
270 | u->type = t; |
271 | u->id = s; | |
1cc6c93a | 272 | u->instance = TAKE_PTR(i); |
9e2f7c11 | 273 | |
71fda00f | 274 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 275 | |
598459ce | 276 | unit_init(u); |
598459ce | 277 | } |
9e2f7c11 | 278 | |
598459ce | 279 | s = NULL; |
9e2f7c11 | 280 | |
598459ce LP |
281 | unit_add_to_dbus_queue(u); |
282 | return 0; | |
87f0e418 LP |
283 | } |
284 | ||
0ae97ec1 | 285 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 286 | _cleanup_free_ char *t = NULL; |
598459ce | 287 | char *s, *i; |
276c3e78 | 288 | int r; |
0ae97ec1 LP |
289 | |
290 | assert(u); | |
291 | assert(name); | |
292 | ||
7410616c | 293 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 294 | |
ac155bb8 | 295 | if (!u->instance) |
9e2f7c11 LP |
296 | return -EINVAL; |
297 | ||
7410616c LP |
298 | r = unit_name_replace_instance(name, u->instance, &t); |
299 | if (r < 0) | |
300 | return r; | |
9e2f7c11 LP |
301 | |
302 | name = t; | |
303 | } | |
304 | ||
0ae97ec1 | 305 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 306 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 307 | if (!s) |
0ae97ec1 LP |
308 | return -ENOENT; |
309 | ||
7410616c | 310 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
311 | r = unit_name_to_instance(s, &i); |
312 | if (r < 0) | |
276c3e78 LP |
313 | return r; |
314 | ||
ac155bb8 | 315 | u->id = s; |
276c3e78 | 316 | |
ac155bb8 MS |
317 | free(u->instance); |
318 | u->instance = i; | |
276c3e78 | 319 | |
c1e1601e | 320 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 321 | |
0ae97ec1 LP |
322 | return 0; |
323 | } | |
324 | ||
f50e0a01 | 325 | int unit_set_description(Unit *u, const char *description) { |
84b26d51 | 326 | int r; |
f50e0a01 LP |
327 | |
328 | assert(u); | |
329 | ||
84b26d51 LP |
330 | r = free_and_strdup(&u->description, empty_to_null(description)); |
331 | if (r < 0) | |
332 | return r; | |
333 | if (r > 0) | |
334 | unit_add_to_dbus_queue(u); | |
c1e1601e | 335 | |
f50e0a01 LP |
336 | return 0; |
337 | } | |
338 | ||
f2f725e5 | 339 | bool unit_may_gc(Unit *u) { |
a354329f | 340 | UnitActiveState state; |
e98b2fbb | 341 | int r; |
5afe510c | 342 | |
701cc384 LP |
343 | assert(u); |
344 | ||
f2f725e5 ZJS |
345 | /* Checks whether the unit is ready to be unloaded for garbage collection. |
346 | * Returns true when the unit may be collected, and false if there's some | |
2641f02e ZJS |
347 | * reason to keep it loaded. |
348 | * | |
349 | * References from other units are *not* checked here. Instead, this is done | |
350 | * in unit_gc_sweep(), but using markers to properly collect dependency loops. | |
351 | */ | |
5afe510c | 352 | |
a354329f | 353 | if (u->job) |
f2f725e5 | 354 | return false; |
701cc384 | 355 | |
a354329f | 356 | if (u->nop_job) |
f2f725e5 | 357 | return false; |
6c073082 | 358 | |
a354329f LP |
359 | state = unit_active_state(u); |
360 | ||
7eb2a8a1 | 361 | /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */ |
a354329f LP |
362 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && |
363 | UNIT_VTABLE(u)->release_resources) | |
7eb2a8a1 | 364 | UNIT_VTABLE(u)->release_resources(u); |
a354329f | 365 | |
f5869324 | 366 | if (u->perpetual) |
f2f725e5 | 367 | return false; |
9d576438 | 368 | |
05a98afd | 369 | if (sd_bus_track_count(u->bus_track) > 0) |
f2f725e5 | 370 | return false; |
05a98afd | 371 | |
5afe510c LP |
372 | /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */ |
373 | switch (u->collect_mode) { | |
374 | ||
375 | case COLLECT_INACTIVE: | |
376 | if (state != UNIT_INACTIVE) | |
f2f725e5 | 377 | return false; |
5afe510c LP |
378 | |
379 | break; | |
380 | ||
381 | case COLLECT_INACTIVE_OR_FAILED: | |
382 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
f2f725e5 | 383 | return false; |
5afe510c LP |
384 | |
385 | break; | |
386 | ||
387 | default: | |
388 | assert_not_reached("Unknown garbage collection mode"); | |
389 | } | |
390 | ||
e98b2fbb LP |
391 | if (u->cgroup_path) { |
392 | /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay | |
393 | * around. Units with active processes should never be collected. */ | |
394 | ||
395 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
396 | if (r < 0) | |
397 | log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", u->cgroup_path); | |
398 | if (r <= 0) | |
f2f725e5 | 399 | return false; |
e98b2fbb LP |
400 | } |
401 | ||
f2f725e5 ZJS |
402 | if (UNIT_VTABLE(u)->may_gc && !UNIT_VTABLE(u)->may_gc(u)) |
403 | return false; | |
701cc384 | 404 | |
f2f725e5 | 405 | return true; |
701cc384 LP |
406 | } |
407 | ||
87f0e418 LP |
408 | void unit_add_to_load_queue(Unit *u) { |
409 | assert(u); | |
ac155bb8 | 410 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 411 | |
ac155bb8 | 412 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
413 | return; |
414 | ||
71fda00f | 415 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 416 | u->in_load_queue = true; |
87f0e418 LP |
417 | } |
418 | ||
23a177ef LP |
419 | void unit_add_to_cleanup_queue(Unit *u) { |
420 | assert(u); | |
421 | ||
ac155bb8 | 422 | if (u->in_cleanup_queue) |
23a177ef LP |
423 | return; |
424 | ||
71fda00f | 425 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 426 | u->in_cleanup_queue = true; |
23a177ef LP |
427 | } |
428 | ||
701cc384 LP |
429 | void unit_add_to_gc_queue(Unit *u) { |
430 | assert(u); | |
431 | ||
ac155bb8 | 432 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
433 | return; |
434 | ||
f2f725e5 | 435 | if (!unit_may_gc(u)) |
701cc384 LP |
436 | return; |
437 | ||
c5a97ed1 | 438 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 439 | u->in_gc_queue = true; |
701cc384 LP |
440 | } |
441 | ||
c1e1601e LP |
442 | void unit_add_to_dbus_queue(Unit *u) { |
443 | assert(u); | |
ac155bb8 | 444 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 445 | |
ac155bb8 | 446 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
447 | return; |
448 | ||
a567261a | 449 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 450 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 451 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 452 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 453 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
454 | return; |
455 | } | |
456 | ||
71fda00f | 457 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 458 | u->in_dbus_queue = true; |
c1e1601e LP |
459 | } |
460 | ||
fda09318 | 461 | void unit_submit_to_stop_when_unneeded_queue(Unit *u) { |
a3c1168a LP |
462 | assert(u); |
463 | ||
464 | if (u->in_stop_when_unneeded_queue) | |
465 | return; | |
466 | ||
467 | if (!u->stop_when_unneeded) | |
468 | return; | |
469 | ||
470 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
471 | return; | |
472 | ||
473 | LIST_PREPEND(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
474 | u->in_stop_when_unneeded_queue = true; | |
475 | } | |
476 | ||
eef85c4a | 477 | static void bidi_set_free(Unit *u, Hashmap *h) { |
87f0e418 | 478 | Unit *other; |
eef85c4a LP |
479 | Iterator i; |
480 | void *v; | |
87f0e418 LP |
481 | |
482 | assert(u); | |
483 | ||
eef85c4a | 484 | /* Frees the hashmap and makes sure we are dropped from the inverse pointers */ |
87f0e418 | 485 | |
eef85c4a | 486 | HASHMAP_FOREACH_KEY(v, other, h, i) { |
87f0e418 LP |
487 | UnitDependency d; |
488 | ||
489 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
eef85c4a | 490 | hashmap_remove(other->dependencies[d], u); |
701cc384 LP |
491 | |
492 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
493 | } |
494 | ||
eef85c4a | 495 | hashmap_free(h); |
87f0e418 LP |
496 | } |
497 | ||
c2756a68 LP |
498 | static void unit_remove_transient(Unit *u) { |
499 | char **i; | |
500 | ||
501 | assert(u); | |
502 | ||
503 | if (!u->transient) | |
504 | return; | |
505 | ||
506 | if (u->fragment_path) | |
3f5e8115 | 507 | (void) unlink(u->fragment_path); |
c2756a68 LP |
508 | |
509 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 510 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 511 | |
39591351 LP |
512 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
513 | if (!p) | |
514 | continue; | |
515 | ||
516 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
517 | if (!pp) | |
518 | continue; | |
519 | ||
520 | /* Only drop transient drop-ins */ | |
521 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
522 | continue; | |
c2756a68 | 523 | |
39591351 LP |
524 | (void) unlink(*i); |
525 | (void) rmdir(p); | |
c2756a68 LP |
526 | } |
527 | } | |
528 | ||
a57f7e2c | 529 | static void unit_free_requires_mounts_for(Unit *u) { |
eef85c4a | 530 | assert(u); |
a57f7e2c | 531 | |
eef85c4a LP |
532 | for (;;) { |
533 | _cleanup_free_ char *path; | |
a57f7e2c | 534 | |
eef85c4a LP |
535 | path = hashmap_steal_first_key(u->requires_mounts_for); |
536 | if (!path) | |
537 | break; | |
538 | else { | |
539 | char s[strlen(path) + 1]; | |
a57f7e2c | 540 | |
eef85c4a LP |
541 | PATH_FOREACH_PREFIX_MORE(s, path) { |
542 | char *y; | |
543 | Set *x; | |
544 | ||
545 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
546 | if (!x) | |
547 | continue; | |
a57f7e2c | 548 | |
eef85c4a | 549 | (void) set_remove(x, u); |
a57f7e2c | 550 | |
eef85c4a LP |
551 | if (set_isempty(x)) { |
552 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
553 | free(y); | |
554 | set_free(x); | |
555 | } | |
a57f7e2c LP |
556 | } |
557 | } | |
558 | } | |
559 | ||
eef85c4a | 560 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
a57f7e2c LP |
561 | } |
562 | ||
598459ce LP |
563 | static void unit_done(Unit *u) { |
564 | ExecContext *ec; | |
565 | CGroupContext *cc; | |
566 | ||
567 | assert(u); | |
568 | ||
569 | if (u->type < 0) | |
570 | return; | |
571 | ||
572 | if (UNIT_VTABLE(u)->done) | |
573 | UNIT_VTABLE(u)->done(u); | |
574 | ||
575 | ec = unit_get_exec_context(u); | |
576 | if (ec) | |
577 | exec_context_done(ec); | |
578 | ||
579 | cc = unit_get_cgroup_context(u); | |
580 | if (cc) | |
581 | cgroup_context_done(cc); | |
582 | } | |
583 | ||
87f0e418 LP |
584 | void unit_free(Unit *u) { |
585 | UnitDependency d; | |
586 | Iterator i; | |
587 | char *t; | |
588 | ||
c9d5c9c0 LP |
589 | if (!u) |
590 | return; | |
87f0e418 | 591 | |
b8b6f321 LP |
592 | if (UNIT_ISSET(u->slice)) { |
593 | /* A unit is being dropped from the tree, make sure our parent slice recalculates the member mask */ | |
594 | unit_invalidate_cgroup_members_masks(UNIT_DEREF(u->slice)); | |
595 | ||
596 | /* And make sure the parent is realized again, updating cgroup memberships */ | |
597 | unit_add_to_cgroup_realize_queue(UNIT_DEREF(u->slice)); | |
598 | } | |
599 | ||
50fb00b7 | 600 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 601 | |
2c289ea8 | 602 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
603 | unit_remove_transient(u); |
604 | ||
c1e1601e LP |
605 | bus_unit_send_removed_signal(u); |
606 | ||
598459ce | 607 | unit_done(u); |
a013b84b | 608 | |
50be4f4a | 609 | unit_dequeue_rewatch_pids(u); |
cf9fd508 | 610 | |
50be4f4a | 611 | sd_bus_slot_unref(u->match_bus_slot); |
05a98afd LP |
612 | sd_bus_track_unref(u->bus_track); |
613 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
614 | ||
a57f7e2c LP |
615 | unit_free_requires_mounts_for(u); |
616 | ||
ac155bb8 MS |
617 | SET_FOREACH(t, u->names, i) |
618 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 619 | |
4b58153d LP |
620 | if (!sd_id128_is_null(u->invocation_id)) |
621 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
622 | ||
97e7d748 MS |
623 | if (u->job) { |
624 | Job *j = u->job; | |
625 | job_uninstall(j); | |
626 | job_free(j); | |
627 | } | |
964e0949 | 628 | |
e0209d83 MS |
629 | if (u->nop_job) { |
630 | Job *j = u->nop_job; | |
631 | job_uninstall(j); | |
632 | job_free(j); | |
633 | } | |
634 | ||
964e0949 | 635 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 636 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 637 | |
adefcf28 LP |
638 | if (u->on_console) |
639 | manager_unref_console(u->manager); | |
640 | ||
efdb0237 | 641 | unit_release_cgroup(u); |
72673e86 | 642 | |
d3070fbd LP |
643 | if (!MANAGER_IS_RELOADING(u->manager)) |
644 | unit_unlink_state_files(u); | |
645 | ||
00d9ef85 LP |
646 | unit_unref_uid_gid(u, false); |
647 | ||
5269eb6b | 648 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 649 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 650 | |
a911bb9a LP |
651 | unit_unwatch_all_pids(u); |
652 | ||
702a2d8f | 653 | unit_ref_unset(&u->slice); |
7f7d01ed ZJS |
654 | while (u->refs_by_target) |
655 | unit_ref_unset(u->refs_by_target); | |
57020a3a | 656 | |
ac155bb8 | 657 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 658 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 659 | |
ac155bb8 | 660 | if (u->in_load_queue) |
71fda00f | 661 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 662 | |
ac155bb8 | 663 | if (u->in_dbus_queue) |
71fda00f | 664 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 665 | |
a2d72e26 | 666 | if (u->in_gc_queue) |
c5a97ed1 | 667 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 668 | |
91a6073e LP |
669 | if (u->in_cgroup_realize_queue) |
670 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 671 | |
09e24654 LP |
672 | if (u->in_cgroup_empty_queue) |
673 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
674 | ||
1bdf2790 ZJS |
675 | if (u->in_cleanup_queue) |
676 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
adefcf28 | 677 | |
19496554 MS |
678 | if (u->in_target_deps_queue) |
679 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
680 | ||
a3c1168a LP |
681 | if (u->in_stop_when_unneeded_queue) |
682 | LIST_REMOVE(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
683 | ||
6a48d82f DM |
684 | safe_close(u->ip_accounting_ingress_map_fd); |
685 | safe_close(u->ip_accounting_egress_map_fd); | |
72673e86 | 686 | |
6a48d82f DM |
687 | safe_close(u->ipv4_allow_map_fd); |
688 | safe_close(u->ipv6_allow_map_fd); | |
689 | safe_close(u->ipv4_deny_map_fd); | |
690 | safe_close(u->ipv6_deny_map_fd); | |
d3070fbd | 691 | |
6a48d82f | 692 | bpf_program_unref(u->ip_bpf_ingress); |
aa2b6f1d | 693 | bpf_program_unref(u->ip_bpf_ingress_installed); |
6a48d82f | 694 | bpf_program_unref(u->ip_bpf_egress); |
aa2b6f1d | 695 | bpf_program_unref(u->ip_bpf_egress_installed); |
00d9ef85 | 696 | |
fab34748 KL |
697 | set_free(u->ip_bpf_custom_ingress); |
698 | set_free(u->ip_bpf_custom_egress); | |
699 | set_free(u->ip_bpf_custom_ingress_installed); | |
700 | set_free(u->ip_bpf_custom_egress_installed); | |
701 | ||
084c7007 RG |
702 | bpf_program_unref(u->bpf_device_control_installed); |
703 | ||
a946fa9b ZJS |
704 | condition_free_list(u->conditions); |
705 | condition_free_list(u->asserts); | |
f755e3b7 | 706 | |
ac155bb8 | 707 | free(u->description); |
49dbfa7b | 708 | strv_free(u->documentation); |
ac155bb8 | 709 | free(u->fragment_path); |
1b64d026 | 710 | free(u->source_path); |
ae7a7182 | 711 | strv_free(u->dropin_paths); |
ac155bb8 | 712 | free(u->instance); |
87f0e418 | 713 | |
f189ab18 LP |
714 | free(u->job_timeout_reboot_arg); |
715 | ||
ac155bb8 | 716 | set_free_free(u->names); |
87f0e418 | 717 | |
6bf0f408 LP |
718 | free(u->reboot_arg); |
719 | ||
87f0e418 LP |
720 | free(u); |
721 | } | |
722 | ||
723 | UnitActiveState unit_active_state(Unit *u) { | |
724 | assert(u); | |
725 | ||
ac155bb8 | 726 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
727 | return unit_active_state(unit_follow_merge(u)); |
728 | ||
729 | /* After a reload it might happen that a unit is not correctly | |
730 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 731 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
732 | |
733 | return UNIT_VTABLE(u)->active_state(u); | |
734 | } | |
735 | ||
10a94420 LP |
736 | const char* unit_sub_state_to_string(Unit *u) { |
737 | assert(u); | |
738 | ||
739 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
740 | } | |
741 | ||
eef85c4a LP |
742 | static int set_complete_move(Set **s, Set **other) { |
743 | assert(s); | |
744 | assert(other); | |
745 | ||
746 | if (!other) | |
747 | return 0; | |
748 | ||
749 | if (*s) | |
750 | return set_move(*s, *other); | |
ae2a15bc LP |
751 | else |
752 | *s = TAKE_PTR(*other); | |
7c0b05e5 | 753 | |
eef85c4a LP |
754 | return 0; |
755 | } | |
756 | ||
757 | static int hashmap_complete_move(Hashmap **s, Hashmap **other) { | |
23a177ef LP |
758 | assert(s); |
759 | assert(other); | |
87f0e418 | 760 | |
23a177ef | 761 | if (!*other) |
7c0b05e5 | 762 | return 0; |
87f0e418 | 763 | |
eef85c4a LP |
764 | if (*s) |
765 | return hashmap_move(*s, *other); | |
ae2a15bc LP |
766 | else |
767 | *s = TAKE_PTR(*other); | |
7c0b05e5 MS |
768 | |
769 | return 0; | |
23a177ef | 770 | } |
87f0e418 | 771 | |
7c0b05e5 | 772 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
773 | char *t; |
774 | Iterator i; | |
7c0b05e5 | 775 | int r; |
87f0e418 | 776 | |
23a177ef LP |
777 | assert(u); |
778 | assert(other); | |
779 | ||
eef85c4a | 780 | r = set_complete_move(&u->names, &other->names); |
7c0b05e5 MS |
781 | if (r < 0) |
782 | return r; | |
23a177ef | 783 | |
ac155bb8 MS |
784 | set_free_free(other->names); |
785 | other->names = NULL; | |
786 | other->id = NULL; | |
23a177ef | 787 | |
ac155bb8 MS |
788 | SET_FOREACH(t, u->names, i) |
789 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
790 | |
791 | return 0; | |
87f0e418 LP |
792 | } |
793 | ||
09a65f92 MS |
794 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
795 | unsigned n_reserve; | |
796 | ||
797 | assert(u); | |
798 | assert(other); | |
799 | assert(d < _UNIT_DEPENDENCY_MAX); | |
800 | ||
801 | /* | |
802 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 803 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
804 | * as a whole to u by complete_move(). |
805 | */ | |
806 | if (!u->dependencies[d]) | |
807 | return 0; | |
808 | ||
809 | /* merge_dependencies() will skip a u-on-u dependency */ | |
eef85c4a | 810 | n_reserve = hashmap_size(other->dependencies[d]) - !!hashmap_get(other->dependencies[d], u); |
09a65f92 | 811 | |
eef85c4a | 812 | return hashmap_reserve(u->dependencies[d], n_reserve); |
09a65f92 MS |
813 | } |
814 | ||
d1fab3fe | 815 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
816 | Iterator i; |
817 | Unit *back; | |
eef85c4a | 818 | void *v; |
87f0e418 | 819 | int r; |
23a177ef | 820 | |
eef85c4a LP |
821 | /* Merges all dependencies of type 'd' of the unit 'other' into the deps of the unit 'u' */ |
822 | ||
23a177ef LP |
823 | assert(u); |
824 | assert(other); | |
825 | assert(d < _UNIT_DEPENDENCY_MAX); | |
826 | ||
5238e957 | 827 | /* Fix backwards pointers. Let's iterate through all dependent units of the other unit. */ |
eef85c4a | 828 | HASHMAP_FOREACH_KEY(v, back, other->dependencies[d], i) { |
23a177ef LP |
829 | UnitDependency k; |
830 | ||
eef85c4a LP |
831 | /* Let's now iterate through the dependencies of that dependencies of the other units, looking for |
832 | * pointers back, and let's fix them up, to instead point to 'u'. */ | |
833 | ||
e48614c4 | 834 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff | 835 | if (back == u) { |
eef85c4a LP |
836 | /* Do not add dependencies between u and itself. */ |
837 | if (hashmap_remove(back->dependencies[k], other)) | |
f2341e0a | 838 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff | 839 | } else { |
eef85c4a LP |
840 | UnitDependencyInfo di_u, di_other, di_merged; |
841 | ||
842 | /* Let's drop this dependency between "back" and "other", and let's create it between | |
843 | * "back" and "u" instead. Let's merge the bit masks of the dependency we are moving, | |
844 | * and any such dependency which might already exist */ | |
845 | ||
846 | di_other.data = hashmap_get(back->dependencies[k], other); | |
847 | if (!di_other.data) | |
848 | continue; /* dependency isn't set, let's try the next one */ | |
849 | ||
850 | di_u.data = hashmap_get(back->dependencies[k], u); | |
851 | ||
852 | di_merged = (UnitDependencyInfo) { | |
853 | .origin_mask = di_u.origin_mask | di_other.origin_mask, | |
854 | .destination_mask = di_u.destination_mask | di_other.destination_mask, | |
855 | }; | |
856 | ||
857 | r = hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data); | |
858 | if (r < 0) | |
859 | log_warning_errno(r, "Failed to remove/replace: back=%s other=%s u=%s: %m", back->id, other_id, u->id); | |
860 | assert(r >= 0); | |
861 | ||
862 | /* assert_se(hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data) >= 0); */ | |
e66047ff | 863 | } |
e48614c4 | 864 | } |
eef85c4a | 865 | |
23a177ef LP |
866 | } |
867 | ||
e66047ff | 868 | /* Also do not move dependencies on u to itself */ |
eef85c4a | 869 | back = hashmap_remove(other->dependencies[d], u); |
d1fab3fe | 870 | if (back) |
f2341e0a | 871 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 872 | |
7c0b05e5 | 873 | /* The move cannot fail. The caller must have performed a reservation. */ |
eef85c4a | 874 | assert_se(hashmap_complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); |
23a177ef | 875 | |
eef85c4a | 876 | other->dependencies[d] = hashmap_free(other->dependencies[d]); |
23a177ef LP |
877 | } |
878 | ||
879 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 880 | UnitDependency d; |
d1fab3fe | 881 | const char *other_id = NULL; |
09a65f92 | 882 | int r; |
87f0e418 LP |
883 | |
884 | assert(u); | |
885 | assert(other); | |
ac155bb8 MS |
886 | assert(u->manager == other->manager); |
887 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 888 | |
cc916967 LP |
889 | other = unit_follow_merge(other); |
890 | ||
23a177ef LP |
891 | if (other == u) |
892 | return 0; | |
893 | ||
ac155bb8 | 894 | if (u->type != other->type) |
9e2f7c11 LP |
895 | return -EINVAL; |
896 | ||
ac155bb8 | 897 | if (!u->instance != !other->instance) |
87f0e418 LP |
898 | return -EINVAL; |
899 | ||
8a993b61 | 900 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
901 | return -EEXIST; |
902 | ||
ec2ce0c5 | 903 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 904 | return -EEXIST; |
87f0e418 | 905 | |
ac155bb8 | 906 | if (other->job) |
819e213f LP |
907 | return -EEXIST; |
908 | ||
e0209d83 MS |
909 | if (other->nop_job) |
910 | return -EEXIST; | |
911 | ||
fdf20a31 | 912 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
913 | return -EEXIST; |
914 | ||
d1fab3fe ZJS |
915 | if (other->id) |
916 | other_id = strdupa(other->id); | |
917 | ||
09a65f92 MS |
918 | /* Make reservations to ensure merge_dependencies() won't fail */ |
919 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
920 | r = reserve_dependencies(u, other, d); | |
921 | /* | |
922 | * We don't rollback reservations if we fail. We don't have | |
923 | * a way to undo reservations. A reservation is not a leak. | |
924 | */ | |
925 | if (r < 0) | |
926 | return r; | |
927 | } | |
928 | ||
87f0e418 | 929 | /* Merge names */ |
7c0b05e5 MS |
930 | r = merge_names(u, other); |
931 | if (r < 0) | |
932 | return r; | |
87f0e418 | 933 | |
57020a3a | 934 | /* Redirect all references */ |
7f7d01ed ZJS |
935 | while (other->refs_by_target) |
936 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
57020a3a | 937 | |
87f0e418 LP |
938 | /* Merge dependencies */ |
939 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 940 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 941 | |
ac155bb8 MS |
942 | other->load_state = UNIT_MERGED; |
943 | other->merged_into = u; | |
23a177ef | 944 | |
3616a49c LP |
945 | /* If there is still some data attached to the other node, we |
946 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 947 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
948 | if (UNIT_VTABLE(other)->done) |
949 | UNIT_VTABLE(other)->done(other); | |
950 | ||
951 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
952 | unit_add_to_cleanup_queue(other); |
953 | ||
954 | return 0; | |
955 | } | |
956 | ||
957 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 958 | _cleanup_free_ char *s = NULL; |
23a177ef | 959 | Unit *other; |
9e2f7c11 | 960 | int r; |
23a177ef | 961 | |
e8630e69 ZJS |
962 | /* Either add name to u, or if a unit with name already exists, merge it with u. |
963 | * If name is a template, do the same for name@instance, where instance is u's instance. */ | |
964 | ||
23a177ef LP |
965 | assert(u); |
966 | assert(name); | |
967 | ||
7410616c | 968 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 969 | if (!u->instance) |
9e2f7c11 LP |
970 | return -EINVAL; |
971 | ||
7410616c LP |
972 | r = unit_name_replace_instance(name, u->instance, &s); |
973 | if (r < 0) | |
974 | return r; | |
9e2f7c11 LP |
975 | |
976 | name = s; | |
977 | } | |
978 | ||
c2756a68 | 979 | other = manager_get_unit(u->manager, name); |
7410616c LP |
980 | if (other) |
981 | return unit_merge(u, other); | |
23a177ef | 982 | |
7410616c | 983 | return unit_add_name(u, name); |
23a177ef LP |
984 | } |
985 | ||
986 | Unit* unit_follow_merge(Unit *u) { | |
987 | assert(u); | |
988 | ||
ac155bb8 MS |
989 | while (u->load_state == UNIT_MERGED) |
990 | assert_se(u = u->merged_into); | |
23a177ef LP |
991 | |
992 | return u; | |
993 | } | |
994 | ||
995 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
ada5e276 YW |
996 | ExecDirectoryType dt; |
997 | char **dp; | |
23a177ef LP |
998 | int r; |
999 | ||
1000 | assert(u); | |
1001 | assert(c); | |
1002 | ||
e1e74614 | 1003 | if (c->working_directory && !c->working_directory_missing_ok) { |
eef85c4a | 1004 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1005 | if (r < 0) |
1006 | return r; | |
1007 | } | |
1008 | ||
1009 | if (c->root_directory) { | |
eef85c4a | 1010 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1011 | if (r < 0) |
1012 | return r; | |
1013 | } | |
1014 | ||
915e6d16 | 1015 | if (c->root_image) { |
eef85c4a | 1016 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
1017 | if (r < 0) |
1018 | return r; | |
1019 | } | |
1020 | ||
72fd1768 | 1021 | for (dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
1022 | if (!u->manager->prefix[dt]) |
1023 | continue; | |
1024 | ||
1025 | STRV_FOREACH(dp, c->directories[dt].paths) { | |
1026 | _cleanup_free_ char *p; | |
1027 | ||
657ee2d8 | 1028 | p = path_join(u->manager->prefix[dt], *dp); |
ada5e276 YW |
1029 | if (!p) |
1030 | return -ENOMEM; | |
1031 | ||
eef85c4a | 1032 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
1033 | if (r < 0) |
1034 | return r; | |
1035 | } | |
1036 | } | |
1037 | ||
463d0d15 | 1038 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
1039 | return 0; |
1040 | ||
1041 | if (c->private_tmp) { | |
d71f0505 LP |
1042 | const char *p; |
1043 | ||
1044 | FOREACH_STRING(p, "/tmp", "/var/tmp") { | |
eef85c4a | 1045 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
d71f0505 LP |
1046 | if (r < 0) |
1047 | return r; | |
1048 | } | |
b46a529c | 1049 | |
35d8c19a | 1050 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1051 | if (r < 0) |
1052 | return r; | |
1053 | } | |
1054 | ||
52c239d7 LB |
1055 | if (!IN_SET(c->std_output, |
1056 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1057 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1058 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE) && | |
1059 | !IN_SET(c->std_error, | |
1060 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
1061 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
1062 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE)) | |
23a177ef LP |
1063 | return 0; |
1064 | ||
1065 | /* If syslog or kernel logging is requested, make sure our own | |
1066 | * logging daemon is run first. */ | |
1067 | ||
35d8c19a | 1068 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1069 | if (r < 0) |
1070 | return r; | |
23a177ef | 1071 | |
87f0e418 LP |
1072 | return 0; |
1073 | } | |
1074 | ||
87f0e418 LP |
1075 | const char *unit_description(Unit *u) { |
1076 | assert(u); | |
1077 | ||
ac155bb8 MS |
1078 | if (u->description) |
1079 | return u->description; | |
87f0e418 | 1080 | |
ac155bb8 | 1081 | return strna(u->id); |
87f0e418 LP |
1082 | } |
1083 | ||
2a8f53c6 ZJS |
1084 | const char *unit_status_string(Unit *u) { |
1085 | assert(u); | |
1086 | ||
1087 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_NAME && u->id) | |
1088 | return u->id; | |
1089 | ||
1090 | return unit_description(u); | |
1091 | } | |
1092 | ||
eef85c4a LP |
1093 | static void print_unit_dependency_mask(FILE *f, const char *kind, UnitDependencyMask mask, bool *space) { |
1094 | const struct { | |
1095 | UnitDependencyMask mask; | |
1096 | const char *name; | |
1097 | } table[] = { | |
1098 | { UNIT_DEPENDENCY_FILE, "file" }, | |
1099 | { UNIT_DEPENDENCY_IMPLICIT, "implicit" }, | |
1100 | { UNIT_DEPENDENCY_DEFAULT, "default" }, | |
1101 | { UNIT_DEPENDENCY_UDEV, "udev" }, | |
1102 | { UNIT_DEPENDENCY_PATH, "path" }, | |
1103 | { UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT, "mountinfo-implicit" }, | |
1104 | { UNIT_DEPENDENCY_MOUNTINFO_DEFAULT, "mountinfo-default" }, | |
1105 | { UNIT_DEPENDENCY_PROC_SWAP, "proc-swap" }, | |
1106 | }; | |
1107 | size_t i; | |
1108 | ||
1109 | assert(f); | |
1110 | assert(kind); | |
1111 | assert(space); | |
1112 | ||
1113 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
1114 | ||
1115 | if (mask == 0) | |
1116 | break; | |
1117 | ||
d94a24ca | 1118 | if (FLAGS_SET(mask, table[i].mask)) { |
eef85c4a LP |
1119 | if (*space) |
1120 | fputc(' ', f); | |
1121 | else | |
1122 | *space = true; | |
1123 | ||
1124 | fputs(kind, f); | |
1125 | fputs("-", f); | |
1126 | fputs(table[i].name, f); | |
1127 | ||
1128 | mask &= ~table[i].mask; | |
1129 | } | |
1130 | } | |
1131 | ||
1132 | assert(mask == 0); | |
1133 | } | |
1134 | ||
87f0e418 | 1135 | void unit_dump(Unit *u, FILE *f, const char *prefix) { |
49dbfa7b | 1136 | char *t, **j; |
87f0e418 LP |
1137 | UnitDependency d; |
1138 | Iterator i; | |
47be870b | 1139 | const char *prefix2; |
8d5e5931 | 1140 | char timestamp[5][FORMAT_TIMESTAMP_MAX], timespan[FORMAT_TIMESPAN_MAX]; |
a7f241db | 1141 | Unit *following; |
eeaedb7c | 1142 | _cleanup_set_free_ Set *following_set = NULL; |
05a98afd | 1143 | const char *n; |
02638280 LP |
1144 | CGroupMask m; |
1145 | int r; | |
87f0e418 LP |
1146 | |
1147 | assert(u); | |
ac155bb8 | 1148 | assert(u->type >= 0); |
87f0e418 | 1149 | |
4c940960 | 1150 | prefix = strempty(prefix); |
63c372cb | 1151 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
1152 | |
1153 | fprintf(f, | |
0121d1f2 ZJS |
1154 | "%s-> Unit %s:\n", |
1155 | prefix, u->id); | |
1156 | ||
1157 | SET_FOREACH(t, u->names, i) | |
1158 | if (!streq(t, u->id)) | |
1159 | fprintf(f, "%s\tAlias: %s\n", prefix, t); | |
1160 | ||
1161 | fprintf(f, | |
87f0e418 | 1162 | "%s\tDescription: %s\n" |
9e2f7c11 | 1163 | "%s\tInstance: %s\n" |
87f0e418 | 1164 | "%s\tUnit Load State: %s\n" |
2fad8195 | 1165 | "%s\tUnit Active State: %s\n" |
b895d155 | 1166 | "%s\tState Change Timestamp: %s\n" |
173e3821 | 1167 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 1168 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 1169 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 1170 | "%s\tInactive Enter Timestamp: %s\n" |
f2f725e5 | 1171 | "%s\tMay GC: %s\n" |
9444b1f2 | 1172 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 1173 | "%s\tTransient: %s\n" |
f5869324 | 1174 | "%s\tPerpetual: %s\n" |
5afe510c | 1175 | "%s\tGarbage Collection Mode: %s\n" |
4ad49000 LP |
1176 | "%s\tSlice: %s\n" |
1177 | "%s\tCGroup: %s\n" | |
aae7e17f | 1178 | "%s\tCGroup realized: %s\n", |
87f0e418 | 1179 | prefix, unit_description(u), |
ac155bb8 MS |
1180 | prefix, strna(u->instance), |
1181 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 1182 | prefix, unit_active_state_to_string(unit_active_state(u)), |
8d5e5931 ZJS |
1183 | prefix, strna(format_timestamp(timestamp[0], sizeof(timestamp[0]), u->state_change_timestamp.realtime)), |
1184 | prefix, strna(format_timestamp(timestamp[1], sizeof(timestamp[1]), u->inactive_exit_timestamp.realtime)), | |
1185 | prefix, strna(format_timestamp(timestamp[2], sizeof(timestamp[2]), u->active_enter_timestamp.realtime)), | |
1186 | prefix, strna(format_timestamp(timestamp[3], sizeof(timestamp[3]), u->active_exit_timestamp.realtime)), | |
1187 | prefix, strna(format_timestamp(timestamp[4], sizeof(timestamp[4]), u->inactive_enter_timestamp.realtime)), | |
f2f725e5 | 1188 | prefix, yes_no(unit_may_gc(u)), |
9444b1f2 | 1189 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 1190 | prefix, yes_no(u->transient), |
f5869324 | 1191 | prefix, yes_no(u->perpetual), |
5afe510c | 1192 | prefix, collect_mode_to_string(u->collect_mode), |
4ad49000 LP |
1193 | prefix, strna(unit_slice_name(u)), |
1194 | prefix, strna(u->cgroup_path), | |
aae7e17f FB |
1195 | prefix, yes_no(u->cgroup_realized)); |
1196 | ||
1197 | if (u->cgroup_realized_mask != 0) { | |
1198 | _cleanup_free_ char *s = NULL; | |
1199 | (void) cg_mask_to_string(u->cgroup_realized_mask, &s); | |
02638280 LP |
1200 | fprintf(f, "%s\tCGroup realized mask: %s\n", prefix, strnull(s)); |
1201 | } | |
0adf88b6 | 1202 | |
02638280 LP |
1203 | if (u->cgroup_enabled_mask != 0) { |
1204 | _cleanup_free_ char *s = NULL; | |
1205 | (void) cg_mask_to_string(u->cgroup_enabled_mask, &s); | |
1206 | fprintf(f, "%s\tCGroup enabled mask: %s\n", prefix, strnull(s)); | |
1207 | } | |
0adf88b6 | 1208 | |
02638280 LP |
1209 | m = unit_get_own_mask(u); |
1210 | if (m != 0) { | |
1211 | _cleanup_free_ char *s = NULL; | |
1212 | (void) cg_mask_to_string(m, &s); | |
1213 | fprintf(f, "%s\tCGroup own mask: %s\n", prefix, strnull(s)); | |
aae7e17f | 1214 | } |
0adf88b6 | 1215 | |
02638280 LP |
1216 | m = unit_get_members_mask(u); |
1217 | if (m != 0) { | |
aae7e17f | 1218 | _cleanup_free_ char *s = NULL; |
02638280 | 1219 | (void) cg_mask_to_string(m, &s); |
aae7e17f FB |
1220 | fprintf(f, "%s\tCGroup members mask: %s\n", prefix, strnull(s)); |
1221 | } | |
0301abf4 | 1222 | |
0adf88b6 LP |
1223 | m = unit_get_delegate_mask(u); |
1224 | if (m != 0) { | |
1225 | _cleanup_free_ char *s = NULL; | |
1226 | (void) cg_mask_to_string(m, &s); | |
1227 | fprintf(f, "%s\tCGroup delegate mask: %s\n", prefix, strnull(s)); | |
1228 | } | |
1229 | ||
4b58153d LP |
1230 | if (!sd_id128_is_null(u->invocation_id)) |
1231 | fprintf(f, "%s\tInvocation ID: " SD_ID128_FORMAT_STR "\n", | |
1232 | prefix, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
1233 | ||
49dbfa7b LP |
1234 | STRV_FOREACH(j, u->documentation) |
1235 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
1236 | ||
eeaedb7c LP |
1237 | following = unit_following(u); |
1238 | if (following) | |
ac155bb8 | 1239 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 1240 | |
eeaedb7c LP |
1241 | r = unit_following_set(u, &following_set); |
1242 | if (r >= 0) { | |
1243 | Unit *other; | |
1244 | ||
1245 | SET_FOREACH(other, following_set, i) | |
1246 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
1247 | } | |
1248 | ||
ac155bb8 MS |
1249 | if (u->fragment_path) |
1250 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 1251 | |
1b64d026 LP |
1252 | if (u->source_path) |
1253 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
1254 | ||
ae7a7182 | 1255 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 1256 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 1257 | |
e7dfbb4e LP |
1258 | if (u->failure_action != EMERGENCY_ACTION_NONE) |
1259 | fprintf(f, "%s\tFailure Action: %s\n", prefix, emergency_action_to_string(u->failure_action)); | |
7af67e9a LP |
1260 | if (u->failure_action_exit_status >= 0) |
1261 | fprintf(f, "%s\tFailure Action Exit Status: %i\n", prefix, u->failure_action_exit_status); | |
e7dfbb4e LP |
1262 | if (u->success_action != EMERGENCY_ACTION_NONE) |
1263 | fprintf(f, "%s\tSuccess Action: %s\n", prefix, emergency_action_to_string(u->success_action)); | |
7af67e9a LP |
1264 | if (u->success_action_exit_status >= 0) |
1265 | fprintf(f, "%s\tSuccess Action Exit Status: %i\n", prefix, u->success_action_exit_status); | |
e7dfbb4e | 1266 | |
36c16a7c | 1267 | if (u->job_timeout != USEC_INFINITY) |
2fa4092c | 1268 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 1269 | |
87a47f99 LN |
1270 | if (u->job_timeout_action != EMERGENCY_ACTION_NONE) |
1271 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, emergency_action_to_string(u->job_timeout_action)); | |
f189ab18 LP |
1272 | |
1273 | if (u->job_timeout_reboot_arg) | |
1274 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
1275 | ||
59fccdc5 LP |
1276 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
1277 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 1278 | |
ac155bb8 | 1279 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
1280 | fprintf(f, |
1281 | "%s\tCondition Timestamp: %s\n" | |
1282 | "%s\tCondition Result: %s\n", | |
8d5e5931 | 1283 | prefix, strna(format_timestamp(timestamp[0], sizeof(timestamp[0]), u->condition_timestamp.realtime)), |
ac155bb8 | 1284 | prefix, yes_no(u->condition_result)); |
2791a8f8 | 1285 | |
59fccdc5 LP |
1286 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
1287 | fprintf(f, | |
1288 | "%s\tAssert Timestamp: %s\n" | |
1289 | "%s\tAssert Result: %s\n", | |
8d5e5931 | 1290 | prefix, strna(format_timestamp(timestamp[0], sizeof(timestamp[0]), u->assert_timestamp.realtime)), |
59fccdc5 LP |
1291 | prefix, yes_no(u->assert_result)); |
1292 | ||
87f0e418 | 1293 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
eef85c4a | 1294 | UnitDependencyInfo di; |
87f0e418 LP |
1295 | Unit *other; |
1296 | ||
eef85c4a LP |
1297 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { |
1298 | bool space = false; | |
1299 | ||
1300 | fprintf(f, "%s\t%s: %s (", prefix, unit_dependency_to_string(d), other->id); | |
1301 | ||
1302 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); | |
1303 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1304 | ||
1305 | fputs(")\n", f); | |
1306 | } | |
87f0e418 LP |
1307 | } |
1308 | ||
eef85c4a LP |
1309 | if (!hashmap_isempty(u->requires_mounts_for)) { |
1310 | UnitDependencyInfo di; | |
1311 | const char *path; | |
1312 | ||
1313 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { | |
1314 | bool space = false; | |
7c8fa05c | 1315 | |
eef85c4a | 1316 | fprintf(f, "%s\tRequiresMountsFor: %s (", prefix, path); |
7c8fa05c | 1317 | |
eef85c4a LP |
1318 | print_unit_dependency_mask(f, "origin", di.origin_mask, &space); |
1319 | print_unit_dependency_mask(f, "destination", di.destination_mask, &space); | |
1320 | ||
1321 | fputs(")\n", f); | |
1322 | } | |
7c8fa05c LP |
1323 | } |
1324 | ||
ac155bb8 | 1325 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 1326 | |
b0650475 | 1327 | fprintf(f, |
a40eb732 | 1328 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
1329 | "%s\tRefuseManualStart: %s\n" |
1330 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 1331 | "%s\tDefaultDependencies: %s\n" |
d420282b | 1332 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1333 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1334 | prefix, yes_no(u->stop_when_unneeded), |
1335 | prefix, yes_no(u->refuse_manual_start), | |
1336 | prefix, yes_no(u->refuse_manual_stop), | |
1337 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1338 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1339 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 1340 | |
23a177ef LP |
1341 | if (UNIT_VTABLE(u)->dump) |
1342 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1343 | |
ac155bb8 | 1344 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1345 | fprintf(f, |
1346 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1347 | prefix, u->merged_into->id); |
1348 | else if (u->load_state == UNIT_ERROR) | |
4bbccb02 | 1349 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror_safe(u->load_error)); |
8821a00f | 1350 | |
05a98afd LP |
1351 | for (n = sd_bus_track_first(u->bus_track); n; n = sd_bus_track_next(u->bus_track)) |
1352 | fprintf(f, "%s\tBus Ref: %s\n", prefix, n); | |
87f0e418 | 1353 | |
ac155bb8 MS |
1354 | if (u->job) |
1355 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1356 | |
e0209d83 MS |
1357 | if (u->nop_job) |
1358 | job_dump(u->nop_job, f, prefix2); | |
87f0e418 LP |
1359 | } |
1360 | ||
1361 | /* Common implementation for multiple backends */ | |
c3620770 | 1362 | int unit_load_fragment_and_dropin(Unit *u, bool fragment_required) { |
23a177ef LP |
1363 | int r; |
1364 | ||
1365 | assert(u); | |
23a177ef | 1366 | |
e48614c4 | 1367 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1368 | r = unit_load_fragment(u); |
1369 | if (r < 0) | |
23a177ef LP |
1370 | return r; |
1371 | ||
c3620770 ZJS |
1372 | if (u->load_state == UNIT_STUB) { |
1373 | if (fragment_required) | |
1374 | return -ENOENT; | |
1375 | ||
1376 | u->load_state = UNIT_LOADED; | |
1377 | } | |
23a177ef | 1378 | |
9e4ea9cc ZJS |
1379 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1380 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1381 | * been loaded and which not, at least without doing complicated book-keeping, | |
1382 | * so let's always reread all drop-ins. */ | |
1383 | return unit_load_dropin(unit_follow_merge(u)); | |
23a177ef LP |
1384 | } |
1385 | ||
19496554 MS |
1386 | void unit_add_to_target_deps_queue(Unit *u) { |
1387 | Manager *m = u->manager; | |
1388 | ||
1389 | assert(u); | |
1390 | ||
1391 | if (u->in_target_deps_queue) | |
1392 | return; | |
1393 | ||
1394 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1395 | u->in_target_deps_queue = true; | |
1396 | } | |
1397 | ||
bba34eed | 1398 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1399 | assert(u); |
1400 | assert(target); | |
1401 | ||
ac155bb8 | 1402 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1403 | return 0; |
1404 | ||
35b8ca3a | 1405 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1406 | * that loop check below is reliable */ |
ac155bb8 MS |
1407 | if (u->load_state != UNIT_LOADED || |
1408 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1409 | return 0; |
1410 | ||
21256a2b LP |
1411 | /* If either side wants no automatic dependencies, then let's |
1412 | * skip this */ | |
ac155bb8 MS |
1413 | if (!u->default_dependencies || |
1414 | !target->default_dependencies) | |
21256a2b LP |
1415 | return 0; |
1416 | ||
98bc2000 | 1417 | /* Don't create loops */ |
eef85c4a | 1418 | if (hashmap_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1419 | return 0; |
1420 | ||
eef85c4a | 1421 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1422 | } |
1423 | ||
e954c9cf | 1424 | static int unit_add_slice_dependencies(Unit *u) { |
eef85c4a | 1425 | UnitDependencyMask mask; |
e954c9cf | 1426 | assert(u); |
b81884e7 | 1427 | |
35b7ff80 | 1428 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1429 | return 0; |
1430 | ||
eef85c4a LP |
1431 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1432 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1433 | relationship). */ | |
1434 | mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; | |
1435 | ||
e954c9cf | 1436 | if (UNIT_ISSET(u->slice)) |
eef85c4a | 1437 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true, mask); |
e954c9cf | 1438 | |
8c8da0e0 | 1439 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1440 | return 0; |
1441 | ||
5a724170 | 1442 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, true, mask); |
98bc2000 LP |
1443 | } |
1444 | ||
e954c9cf | 1445 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1446 | UnitDependencyInfo di; |
1447 | const char *path; | |
1448 | Iterator i; | |
9588bc32 LP |
1449 | int r; |
1450 | ||
1451 | assert(u); | |
1452 | ||
eef85c4a LP |
1453 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for, i) { |
1454 | char prefix[strlen(path) + 1]; | |
9588bc32 | 1455 | |
eef85c4a | 1456 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1457 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1458 | Unit *m; |
1459 | ||
c7c89abb | 1460 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1461 | if (r < 0) |
1462 | return r; | |
c7c89abb FB |
1463 | |
1464 | m = manager_get_unit(u->manager, p); | |
1465 | if (!m) { | |
1466 | /* Make sure to load the mount unit if | |
1467 | * it exists. If so the dependencies | |
1468 | * on this unit will be added later | |
1469 | * during the loading of the mount | |
1470 | * unit. */ | |
1471 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1472 | continue; |
c7c89abb | 1473 | } |
9588bc32 LP |
1474 | if (m == u) |
1475 | continue; | |
1476 | ||
1477 | if (m->load_state != UNIT_LOADED) | |
1478 | continue; | |
1479 | ||
eef85c4a | 1480 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1481 | if (r < 0) |
1482 | return r; | |
1483 | ||
1484 | if (m->fragment_path) { | |
eef85c4a | 1485 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1486 | if (r < 0) |
1487 | return r; | |
1488 | } | |
1489 | } | |
1490 | } | |
1491 | ||
1492 | return 0; | |
1493 | } | |
1494 | ||
95ae05c0 WC |
1495 | static int unit_add_startup_units(Unit *u) { |
1496 | CGroupContext *c; | |
5269eb6b | 1497 | int r; |
95ae05c0 WC |
1498 | |
1499 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1500 | if (!c) |
1501 | return 0; | |
1502 | ||
d53d9474 | 1503 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1504 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1505 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1506 | return 0; |
1507 | ||
5269eb6b LP |
1508 | r = set_ensure_allocated(&u->manager->startup_units, NULL); |
1509 | if (r < 0) | |
1510 | return r; | |
1511 | ||
756c09e6 | 1512 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1513 | } |
1514 | ||
87f0e418 LP |
1515 | int unit_load(Unit *u) { |
1516 | int r; | |
1517 | ||
1518 | assert(u); | |
1519 | ||
ac155bb8 | 1520 | if (u->in_load_queue) { |
71fda00f | 1521 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1522 | u->in_load_queue = false; |
87f0e418 LP |
1523 | } |
1524 | ||
ac155bb8 | 1525 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1526 | return -EINVAL; |
1527 | ||
ac155bb8 | 1528 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1529 | return 0; |
1530 | ||
4f4afc88 | 1531 | if (u->transient_file) { |
66fa4bdd LP |
1532 | /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup |
1533 | * is complete, hence let's synchronize the unit file we just wrote to disk. */ | |
1534 | ||
4f4afc88 LP |
1535 | r = fflush_and_check(u->transient_file); |
1536 | if (r < 0) | |
1537 | goto fail; | |
1538 | ||
50fb00b7 | 1539 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1540 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1541 | } |
1542 | ||
c3784a7d ZJS |
1543 | r = UNIT_VTABLE(u)->load(u); |
1544 | if (r < 0) | |
23a177ef | 1545 | goto fail; |
c3784a7d ZJS |
1546 | |
1547 | assert(u->load_state != UNIT_STUB); | |
23a177ef | 1548 | |
7c8fa05c | 1549 | if (u->load_state == UNIT_LOADED) { |
19496554 | 1550 | unit_add_to_target_deps_queue(u); |
e954c9cf LP |
1551 | |
1552 | r = unit_add_slice_dependencies(u); | |
1553 | if (r < 0) | |
1554 | goto fail; | |
c2756a68 | 1555 | |
e954c9cf | 1556 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1557 | if (r < 0) |
c2756a68 | 1558 | goto fail; |
7c8fa05c | 1559 | |
95ae05c0 WC |
1560 | r = unit_add_startup_units(u); |
1561 | if (r < 0) | |
1562 | goto fail; | |
1563 | ||
eef85c4a | 1564 | if (u->on_failure_job_mode == JOB_ISOLATE && hashmap_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1565 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
6f40aa45 | 1566 | r = -ENOEXEC; |
c2756a68 LP |
1567 | goto fail; |
1568 | } | |
bc432dc7 | 1569 | |
a2df3ea4 MK |
1570 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1571 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1572 | ||
5af88058 LP |
1573 | /* We finished loading, let's ensure our parents recalculate the members mask */ |
1574 | unit_invalidate_cgroup_members_masks(u); | |
f68319bb LP |
1575 | } |
1576 | ||
ac155bb8 | 1577 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1578 | |
1579 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1580 | unit_add_to_gc_queue(u); |
87f0e418 | 1581 | |
87f0e418 LP |
1582 | return 0; |
1583 | ||
1584 | fail: | |
c4555ad8 LP |
1585 | /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code should hence |
1586 | * return ENOEXEC to ensure units are placed in this state after loading */ | |
1587 | ||
1588 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : | |
1589 | r == -ENOEXEC ? UNIT_BAD_SETTING : | |
1590 | UNIT_ERROR; | |
ac155bb8 | 1591 | u->load_error = r; |
c4555ad8 | 1592 | |
c1e1601e | 1593 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1594 | unit_add_to_gc_queue(u); |
23a177ef | 1595 | |
c4555ad8 | 1596 | return log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
87f0e418 LP |
1597 | } |
1598 | ||
f9f88198 YW |
1599 | _printf_(7, 8) |
1600 | static int log_unit_internal(void *userdata, int level, int error, const char *file, int line, const char *func, const char *format, ...) { | |
1601 | Unit *u = userdata; | |
1602 | va_list ap; | |
1603 | int r; | |
49365733 | 1604 | |
f9f88198 YW |
1605 | va_start(ap, format); |
1606 | if (u) | |
1607 | r = log_object_internalv(level, error, file, line, func, | |
1608 | u->manager->unit_log_field, | |
1609 | u->id, | |
1610 | u->manager->invocation_log_field, | |
1611 | u->invocation_id_string, | |
1612 | format, ap); | |
1613 | else | |
1614 | r = log_internalv(level, error, file, line, func, format, ap); | |
1615 | va_end(ap); | |
49365733 | 1616 | |
f9f88198 | 1617 | return r; |
49365733 LP |
1618 | } |
1619 | ||
97a3f4ee | 1620 | static bool unit_test_condition(Unit *u) { |
90bbc946 LP |
1621 | assert(u); |
1622 | ||
ac155bb8 | 1623 | dual_timestamp_get(&u->condition_timestamp); |
f9f88198 | 1624 | u->condition_result = condition_test_list(u->conditions, condition_type_to_string, log_unit_internal, u); |
90bbc946 | 1625 | |
e18f8852 LP |
1626 | unit_add_to_dbus_queue(u); |
1627 | ||
ac155bb8 | 1628 | return u->condition_result; |
90bbc946 LP |
1629 | } |
1630 | ||
97a3f4ee | 1631 | static bool unit_test_assert(Unit *u) { |
59fccdc5 LP |
1632 | assert(u); |
1633 | ||
1634 | dual_timestamp_get(&u->assert_timestamp); | |
f9f88198 | 1635 | u->assert_result = condition_test_list(u->asserts, assert_type_to_string, log_unit_internal, u); |
59fccdc5 | 1636 | |
e18f8852 LP |
1637 | unit_add_to_dbus_queue(u); |
1638 | ||
59fccdc5 LP |
1639 | return u->assert_result; |
1640 | } | |
1641 | ||
df446f96 | 1642 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
5b262f74 LP |
1643 | const char *d; |
1644 | ||
2a8f53c6 | 1645 | d = unit_status_string(u); |
5b262f74 LP |
1646 | if (log_get_show_color()) |
1647 | d = strjoina(ANSI_HIGHLIGHT, d, ANSI_NORMAL); | |
1648 | ||
df446f96 | 1649 | DISABLE_WARNING_FORMAT_NONLITERAL; |
5b262f74 | 1650 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, status, unit_status_msg_format, d); |
df446f96 LP |
1651 | REENABLE_WARNING; |
1652 | } | |
1653 | ||
97a3f4ee | 1654 | int unit_test_start_limit(Unit *u) { |
429926e9 TR |
1655 | const char *reason; |
1656 | ||
6bf0f408 LP |
1657 | assert(u); |
1658 | ||
7bf081a1 | 1659 | if (ratelimit_below(&u->start_ratelimit)) { |
6bf0f408 LP |
1660 | u->start_limit_hit = false; |
1661 | return 0; | |
1662 | } | |
1663 | ||
1664 | log_unit_warning(u, "Start request repeated too quickly."); | |
1665 | u->start_limit_hit = true; | |
1666 | ||
429926e9 TR |
1667 | reason = strjoina("unit ", u->id, " failed"); |
1668 | ||
36c4dc08 LP |
1669 | emergency_action(u->manager, u->start_limit_action, |
1670 | EMERGENCY_ACTION_IS_WATCHDOG|EMERGENCY_ACTION_WARN, | |
1671 | u->reboot_arg, -1, reason); | |
1672 | ||
1673 | return -ECANCELED; | |
6bf0f408 LP |
1674 | } |
1675 | ||
c891efaf | 1676 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1677 | assert(u); |
c891efaf FB |
1678 | |
1679 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1680 | return false; | |
1681 | ||
1682 | /* For some reasons units remaining in the same process group | |
1683 | * as PID 1 fail to acquire the console even if it's not used | |
1684 | * by any process. So skip the confirmation question for them. */ | |
1685 | return !unit_get_exec_context(u)->same_pgrp; | |
1686 | } | |
1687 | ||
631b676b LP |
1688 | static bool unit_verify_deps(Unit *u) { |
1689 | Unit *other; | |
1690 | Iterator j; | |
eef85c4a | 1691 | void *v; |
631b676b LP |
1692 | |
1693 | assert(u); | |
1694 | ||
1695 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with | |
1696 | * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job | |
1697 | * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in | |
1698 | * conjunction with After= as for them any such check would make things entirely racy. */ | |
1699 | ||
eef85c4a | 1700 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], j) { |
631b676b | 1701 | |
eef85c4a | 1702 | if (!hashmap_contains(u->dependencies[UNIT_AFTER], other)) |
631b676b LP |
1703 | continue; |
1704 | ||
1705 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1706 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1707 | return false; | |
1708 | } | |
1709 | } | |
1710 | ||
1711 | return true; | |
1712 | } | |
1713 | ||
9adb6959 | 1714 | /* Errors that aren't really errors: |
6bf0f408 | 1715 | * -EALREADY: Unit is already started. |
9adb6959 | 1716 | * -ECOMM: Condition failed |
6bf0f408 | 1717 | * -EAGAIN: An operation is already in progress. Retry later. |
9adb6959 LP |
1718 | * |
1719 | * Errors that are real errors: | |
1720 | * -EBADR: This unit type does not support starting. | |
2de9b979 | 1721 | * -ECANCELED: Start limit hit, too many requests for now |
6bf0f408 LP |
1722 | * -EPROTO: Assert failed |
1723 | * -EINVAL: Unit not loaded | |
1724 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1725 | * -ENOLINK: The necessary dependencies are not fulfilled. |
d4fd1cf2 | 1726 | * -ESTALE: This unit has been started before and can't be started a second time |
a4191c9f | 1727 | * -ENOENT: This is a triggering unit and unit to trigger is not loaded |
87f0e418 LP |
1728 | */ |
1729 | int unit_start(Unit *u) { | |
1730 | UnitActiveState state; | |
92ab323c | 1731 | Unit *following; |
87f0e418 LP |
1732 | |
1733 | assert(u); | |
1734 | ||
5766aca8 LP |
1735 | /* If this is already started, then this will succeed. Note that this will even succeed if this unit |
1736 | * is not startable by the user. This is relied on to detect when we need to wait for units and when | |
1737 | * waiting is finished. */ | |
87f0e418 LP |
1738 | state = unit_active_state(u); |
1739 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1740 | return -EALREADY; | |
380dc8b0 LP |
1741 | if (state == UNIT_MAINTENANCE) |
1742 | return -EAGAIN; | |
87f0e418 | 1743 | |
6bf0f408 LP |
1744 | /* Units that aren't loaded cannot be started */ |
1745 | if (u->load_state != UNIT_LOADED) | |
1746 | return -EINVAL; | |
1747 | ||
d4fd1cf2 LP |
1748 | /* Refuse starting scope units more than once */ |
1749 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1750 | return -ESTALE; | |
1751 | ||
5766aca8 LP |
1752 | /* If the conditions failed, don't do anything at all. If we already are activating this call might |
1753 | * still be useful to speed up activation in case there is some hold-off time, but we don't want to | |
1754 | * recheck the condition in that case. */ | |
a82e5507 | 1755 | if (state != UNIT_ACTIVATING && |
5af6aa58 | 1756 | !unit_test_condition(u)) |
5766aca8 | 1757 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(ECOMM), "Starting requested but condition failed. Not starting unit."); |
52661efd | 1758 | |
59fccdc5 LP |
1759 | /* If the asserts failed, fail the entire job */ |
1760 | if (state != UNIT_ACTIVATING && | |
5766aca8 LP |
1761 | !unit_test_assert(u)) |
1762 | return log_unit_notice_errno(u, SYNTHETIC_ERRNO(EPROTO), "Starting requested but asserts failed."); | |
59fccdc5 | 1763 | |
5766aca8 LP |
1764 | /* Units of types that aren't supported cannot be started. Note that we do this test only after the |
1765 | * condition checks, so that we rather return condition check errors (which are usually not | |
1766 | * considered a true failure) than "not supported" errors (which are considered a failure). | |
d11a7645 | 1767 | */ |
96cf3ec9 | 1768 | if (!unit_type_supported(u->type)) |
d11a7645 LP |
1769 | return -EOPNOTSUPP; |
1770 | ||
5766aca8 LP |
1771 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine |
1772 | * should have taken care of this already, but let's check this here again. After all, our | |
1773 | * dependencies might not be in effect anymore, due to a reload or due to a failed condition. */ | |
631b676b LP |
1774 | if (!unit_verify_deps(u)) |
1775 | return -ENOLINK; | |
1776 | ||
92ab323c | 1777 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1778 | following = unit_following(u); |
1779 | if (following) { | |
f2341e0a | 1780 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1781 | return unit_start(following); |
1782 | } | |
1783 | ||
1784 | /* If it is stopped, but we cannot start it, then fail */ | |
1785 | if (!UNIT_VTABLE(u)->start) | |
1786 | return -EBADR; | |
1787 | ||
5766aca8 LP |
1788 | /* We don't suppress calls to ->start() here when we are already starting, to allow this request to |
1789 | * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it | |
1790 | * waits for a holdoff timer to elapse before it will start again. */ | |
87f0e418 | 1791 | |
c1e1601e | 1792 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1793 | |
d1a34ae9 | 1794 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1795 | } |
1796 | ||
1797 | bool unit_can_start(Unit *u) { | |
1798 | assert(u); | |
1799 | ||
8ff4d2ab LP |
1800 | if (u->load_state != UNIT_LOADED) |
1801 | return false; | |
1802 | ||
96cf3ec9 | 1803 | if (!unit_type_supported(u->type)) |
8ff4d2ab LP |
1804 | return false; |
1805 | ||
d4fd1cf2 LP |
1806 | /* Scope units may be started only once */ |
1807 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
1808 | return false; | |
1809 | ||
87f0e418 LP |
1810 | return !!UNIT_VTABLE(u)->start; |
1811 | } | |
1812 | ||
2528a7a6 LP |
1813 | bool unit_can_isolate(Unit *u) { |
1814 | assert(u); | |
1815 | ||
1816 | return unit_can_start(u) && | |
ac155bb8 | 1817 | u->allow_isolate; |
2528a7a6 LP |
1818 | } |
1819 | ||
87f0e418 LP |
1820 | /* Errors: |
1821 | * -EBADR: This unit type does not support stopping. | |
1822 | * -EALREADY: Unit is already stopped. | |
1823 | * -EAGAIN: An operation is already in progress. Retry later. | |
1824 | */ | |
1825 | int unit_stop(Unit *u) { | |
1826 | UnitActiveState state; | |
92ab323c | 1827 | Unit *following; |
87f0e418 LP |
1828 | |
1829 | assert(u); | |
1830 | ||
87f0e418 | 1831 | state = unit_active_state(u); |
fdf20a31 | 1832 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1833 | return -EALREADY; |
1834 | ||
0faacd47 LP |
1835 | following = unit_following(u); |
1836 | if (following) { | |
f2341e0a | 1837 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1838 | return unit_stop(following); |
1839 | } | |
1840 | ||
7898b0cf LP |
1841 | if (!UNIT_VTABLE(u)->stop) |
1842 | return -EBADR; | |
1843 | ||
c1e1601e | 1844 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1845 | |
d1a34ae9 | 1846 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1847 | } |
1848 | ||
f5869324 LP |
1849 | bool unit_can_stop(Unit *u) { |
1850 | assert(u); | |
1851 | ||
96cf3ec9 | 1852 | if (!unit_type_supported(u->type)) |
f5869324 LP |
1853 | return false; |
1854 | ||
1855 | if (u->perpetual) | |
1856 | return false; | |
1857 | ||
1858 | return !!UNIT_VTABLE(u)->stop; | |
1859 | } | |
1860 | ||
87f0e418 LP |
1861 | /* Errors: |
1862 | * -EBADR: This unit type does not support reloading. | |
1863 | * -ENOEXEC: Unit is not started. | |
1864 | * -EAGAIN: An operation is already in progress. Retry later. | |
1865 | */ | |
1866 | int unit_reload(Unit *u) { | |
1867 | UnitActiveState state; | |
92ab323c | 1868 | Unit *following; |
87f0e418 LP |
1869 | |
1870 | assert(u); | |
1871 | ||
ac155bb8 | 1872 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1873 | return -EINVAL; |
1874 | ||
87f0e418 LP |
1875 | if (!unit_can_reload(u)) |
1876 | return -EBADR; | |
1877 | ||
1878 | state = unit_active_state(u); | |
e364ad06 | 1879 | if (state == UNIT_RELOADING) |
6255af75 | 1880 | return -EAGAIN; |
87f0e418 | 1881 | |
6a371e23 | 1882 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1883 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1884 | return -ENOEXEC; |
6a371e23 | 1885 | } |
87f0e418 | 1886 | |
e48614c4 ZJS |
1887 | following = unit_following(u); |
1888 | if (following) { | |
f2341e0a | 1889 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1890 | return unit_reload(following); |
1891 | } | |
1892 | ||
c1e1601e | 1893 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1894 | |
f54bcca5 JR |
1895 | if (!UNIT_VTABLE(u)->reload) { |
1896 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
2ad2e41a | 1897 | unit_notify(u, unit_active_state(u), unit_active_state(u), 0); |
f54bcca5 JR |
1898 | return 0; |
1899 | } | |
1900 | ||
d1a34ae9 | 1901 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1902 | } |
1903 | ||
1904 | bool unit_can_reload(Unit *u) { | |
1905 | assert(u); | |
1906 | ||
f54bcca5 JR |
1907 | if (UNIT_VTABLE(u)->can_reload) |
1908 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 1909 | |
eef85c4a | 1910 | if (!hashmap_isempty(u->dependencies[UNIT_PROPAGATES_RELOAD_TO])) |
87f0e418 LP |
1911 | return true; |
1912 | ||
f54bcca5 | 1913 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
1914 | } |
1915 | ||
a3c1168a LP |
1916 | bool unit_is_unneeded(Unit *u) { |
1917 | static const UnitDependency deps[] = { | |
be7d9ff7 | 1918 | UNIT_REQUIRED_BY, |
084918ba | 1919 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1920 | UNIT_WANTED_BY, |
1921 | UNIT_BOUND_BY, | |
1922 | }; | |
a3c1168a | 1923 | size_t j; |
f3bff0eb LP |
1924 | |
1925 | assert(u); | |
1926 | ||
ac155bb8 | 1927 | if (!u->stop_when_unneeded) |
a3c1168a | 1928 | return false; |
f3bff0eb | 1929 | |
a3c1168a LP |
1930 | /* Don't clean up while the unit is transitioning or is even inactive. */ |
1931 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
1932 | return false; | |
1933 | if (u->job) | |
1934 | return false; | |
f3bff0eb | 1935 | |
a3c1168a | 1936 | for (j = 0; j < ELEMENTSOF(deps); j++) { |
eef85c4a LP |
1937 | Unit *other; |
1938 | Iterator i; | |
1939 | void *v; | |
1940 | ||
fda09318 | 1941 | /* If a dependent unit has a job queued, is active or transitioning, or is marked for |
a3c1168a | 1942 | * restart, then don't clean this one up. */ |
b81884e7 | 1943 | |
a3c1168a | 1944 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[deps[j]], i) { |
93d4cb09 | 1945 | if (other->job) |
a3c1168a LP |
1946 | return false; |
1947 | ||
1948 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1949 | return false; | |
1950 | ||
1951 | if (unit_will_restart(other)) | |
1952 | return false; | |
1953 | } | |
bea355da LP |
1954 | } |
1955 | ||
a3c1168a LP |
1956 | return true; |
1957 | } | |
f3bff0eb | 1958 | |
a3c1168a LP |
1959 | static void check_unneeded_dependencies(Unit *u) { |
1960 | ||
1961 | static const UnitDependency deps[] = { | |
1962 | UNIT_REQUIRES, | |
1963 | UNIT_REQUISITE, | |
1964 | UNIT_WANTS, | |
1965 | UNIT_BINDS_TO, | |
1966 | }; | |
1967 | size_t j; | |
1968 | ||
1969 | assert(u); | |
1970 | ||
1971 | /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */ | |
1972 | ||
1973 | for (j = 0; j < ELEMENTSOF(deps); j++) { | |
1974 | Unit *other; | |
1975 | Iterator i; | |
1976 | void *v; | |
1977 | ||
1978 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[deps[j]], i) | |
fda09318 | 1979 | unit_submit_to_stop_when_unneeded_queue(other); |
a3c1168a | 1980 | } |
f3bff0eb LP |
1981 | } |
1982 | ||
ff502445 | 1983 | static void unit_check_binds_to(Unit *u) { |
4afd3348 | 1984 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
ff502445 LP |
1985 | bool stop = false; |
1986 | Unit *other; | |
1987 | Iterator i; | |
eef85c4a | 1988 | void *v; |
67bfdc97 | 1989 | int r; |
ff502445 LP |
1990 | |
1991 | assert(u); | |
1992 | ||
1993 | if (u->job) | |
1994 | return; | |
1995 | ||
1996 | if (unit_active_state(u) != UNIT_ACTIVE) | |
1997 | return; | |
1998 | ||
eef85c4a | 1999 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) { |
ff502445 LP |
2000 | if (other->job) |
2001 | continue; | |
13ddc3fc ZJS |
2002 | |
2003 | if (!other->coldplugged) | |
2004 | /* We might yet create a job for the other unit… */ | |
2005 | continue; | |
ff502445 LP |
2006 | |
2007 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
2008 | continue; | |
2009 | ||
2010 | stop = true; | |
98f738b6 | 2011 | break; |
ff502445 LP |
2012 | } |
2013 | ||
2014 | if (!stop) | |
2015 | return; | |
2016 | ||
595bfe7d | 2017 | /* If stopping a unit fails continuously we might enter a stop |
67bfdc97 LP |
2018 | * loop here, hence stop acting on the service being |
2019 | * unnecessary after a while. */ | |
7994ac1d | 2020 | if (!ratelimit_below(&u->auto_stop_ratelimit)) { |
67bfdc97 LP |
2021 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); |
2022 | return; | |
2023 | } | |
2024 | ||
98f738b6 | 2025 | assert(other); |
f2341e0a | 2026 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
2027 | |
2028 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
50cbaba4 | 2029 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, NULL, &error, NULL); |
67bfdc97 | 2030 | if (r < 0) |
4bd29fe5 | 2031 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
ff502445 LP |
2032 | } |
2033 | ||
87f0e418 LP |
2034 | static void retroactively_start_dependencies(Unit *u) { |
2035 | Iterator i; | |
2036 | Unit *other; | |
eef85c4a | 2037 | void *v; |
87f0e418 LP |
2038 | |
2039 | assert(u); | |
2040 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2041 | ||
eef85c4a LP |
2042 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUIRES], i) |
2043 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2044 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2045 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
b81884e7 | 2046 | |
eef85c4a LP |
2047 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BINDS_TO], i) |
2048 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2049 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2050 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
87f0e418 | 2051 | |
eef85c4a LP |
2052 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_WANTS], i) |
2053 | if (!hashmap_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 2054 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2055 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL, NULL); |
87f0e418 | 2056 | |
eef85c4a | 2057 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 2058 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2059 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
69dd2852 | 2060 | |
eef85c4a | 2061 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 2062 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2063 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
87f0e418 LP |
2064 | } |
2065 | ||
2066 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 | 2067 | Unit *other; |
eef85c4a LP |
2068 | Iterator i; |
2069 | void *v; | |
87f0e418 LP |
2070 | |
2071 | assert(u); | |
2072 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2073 | ||
b81884e7 | 2074 | /* Pull down units which are bound to us recursively if enabled */ |
eef85c4a | 2075 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 2076 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2077 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
cd0504d0 MS |
2078 | } |
2079 | ||
3ecaa09b | 2080 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
2081 | Unit *other; |
2082 | Iterator i; | |
eef85c4a | 2083 | void *v; |
7f66b026 | 2084 | int r; |
c0daa706 LP |
2085 | |
2086 | assert(u); | |
2087 | ||
eef85c4a | 2088 | if (hashmap_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
2089 | return; |
2090 | ||
f2341e0a | 2091 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 2092 | |
eef85c4a | 2093 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_ON_FAILURE], i) { |
7f66b026 | 2094 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
222ae6a8 | 2095 | |
50cbaba4 | 2096 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, NULL, &error, NULL); |
c1b6628d | 2097 | if (r < 0) |
7f66b026 | 2098 | log_unit_warning_errno(u, r, "Failed to enqueue OnFailure= job, ignoring: %s", bus_error_message(&error, r)); |
222ae6a8 | 2099 | } |
c0daa706 LP |
2100 | } |
2101 | ||
3ecaa09b LP |
2102 | void unit_trigger_notify(Unit *u) { |
2103 | Unit *other; | |
2104 | Iterator i; | |
eef85c4a | 2105 | void *v; |
3ecaa09b LP |
2106 | |
2107 | assert(u); | |
2108 | ||
eef85c4a | 2109 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_TRIGGERED_BY], i) |
3ecaa09b LP |
2110 | if (UNIT_VTABLE(other)->trigger_notify) |
2111 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2112 | } | |
2113 | ||
37109b85 ZJS |
2114 | static int raise_level(int log_level, bool condition_info, bool condition_notice) { |
2115 | if (condition_notice && log_level > LOG_NOTICE) | |
2116 | return LOG_NOTICE; | |
2117 | if (condition_info && log_level > LOG_INFO) | |
2118 | return LOG_INFO; | |
2119 | return log_level; | |
2120 | } | |
2121 | ||
915b1d01 | 2122 | static int unit_log_resources(Unit *u) { |
bc40a20e LP |
2123 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + _CGROUP_IO_ACCOUNTING_METRIC_MAX + 4]; |
2124 | bool any_traffic = false, have_ip_accounting = false, any_io = false, have_io_accounting = false; | |
2125 | _cleanup_free_ char *igress = NULL, *egress = NULL, *rr = NULL, *wr = NULL; | |
37109b85 | 2126 | int log_level = LOG_DEBUG; /* May be raised if resources consumed over a treshold */ |
915b1d01 | 2127 | size_t n_message_parts = 0, n_iovec = 0; |
bc40a20e | 2128 | char* message_parts[1 + 2 + 2 + 1], *t; |
915b1d01 LP |
2129 | nsec_t nsec = NSEC_INFINITY; |
2130 | CGroupIPAccountingMetric m; | |
2131 | size_t i; | |
2132 | int r; | |
2133 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2134 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2135 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2136 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2137 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2138 | }; | |
bc40a20e LP |
2139 | const char* const io_fields[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
2140 | [CGROUP_IO_READ_BYTES] = "IO_METRIC_READ_BYTES", | |
2141 | [CGROUP_IO_WRITE_BYTES] = "IO_METRIC_WRITE_BYTES", | |
2142 | [CGROUP_IO_READ_OPERATIONS] = "IO_METRIC_READ_OPERATIONS", | |
2143 | [CGROUP_IO_WRITE_OPERATIONS] = "IO_METRIC_WRITE_OPERATIONS", | |
2144 | }; | |
915b1d01 LP |
2145 | |
2146 | assert(u); | |
2147 | ||
2148 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2149 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2150 | * information and the complete data in structured fields. */ | |
2151 | ||
2152 | (void) unit_get_cpu_usage(u, &nsec); | |
2153 | if (nsec != NSEC_INFINITY) { | |
2154 | char buf[FORMAT_TIMESPAN_MAX] = ""; | |
2155 | ||
2156 | /* Format the CPU time for inclusion in the structured log message */ | |
2157 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2158 | r = log_oom(); | |
2159 | goto finish; | |
2160 | } | |
2161 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2162 | ||
2163 | /* Format the CPU time for inclusion in the human language message string */ | |
2164 | format_timespan(buf, sizeof(buf), nsec / NSEC_PER_USEC, USEC_PER_MSEC); | |
ec9d636b | 2165 | t = strjoin("consumed ", buf, " CPU time"); |
915b1d01 LP |
2166 | if (!t) { |
2167 | r = log_oom(); | |
2168 | goto finish; | |
2169 | } | |
2170 | ||
2171 | message_parts[n_message_parts++] = t; | |
37109b85 ZJS |
2172 | |
2173 | log_level = raise_level(log_level, | |
2174 | nsec > NOTICEWORTHY_CPU_NSEC, | |
2175 | nsec > MENTIONWORTHY_CPU_NSEC); | |
915b1d01 LP |
2176 | } |
2177 | ||
bc40a20e LP |
2178 | for (CGroupIOAccountingMetric k = 0; k < _CGROUP_IO_ACCOUNTING_METRIC_MAX; k++) { |
2179 | char buf[FORMAT_BYTES_MAX] = ""; | |
2180 | uint64_t value = UINT64_MAX; | |
2181 | ||
2182 | assert(io_fields[k]); | |
2183 | ||
2184 | (void) unit_get_io_accounting(u, k, k > 0, &value); | |
2185 | if (value == UINT64_MAX) | |
2186 | continue; | |
2187 | ||
2188 | have_io_accounting = true; | |
2189 | if (value > 0) | |
2190 | any_io = true; | |
2191 | ||
2192 | /* Format IO accounting data for inclusion in the structured log message */ | |
2193 | if (asprintf(&t, "%s=%" PRIu64, io_fields[k], value) < 0) { | |
2194 | r = log_oom(); | |
2195 | goto finish; | |
2196 | } | |
2197 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2198 | ||
2199 | /* Format the IO accounting data for inclusion in the human language message string, but only | |
2200 | * for the bytes counters (and not for the operations counters) */ | |
2201 | if (k == CGROUP_IO_READ_BYTES) { | |
2202 | assert(!rr); | |
2203 | rr = strjoin("read ", format_bytes(buf, sizeof(buf), value), " from disk"); | |
2204 | if (!rr) { | |
2205 | r = log_oom(); | |
2206 | goto finish; | |
2207 | } | |
2208 | } else if (k == CGROUP_IO_WRITE_BYTES) { | |
2209 | assert(!wr); | |
2210 | wr = strjoin("written ", format_bytes(buf, sizeof(buf), value), " to disk"); | |
2211 | if (!wr) { | |
2212 | r = log_oom(); | |
2213 | goto finish; | |
2214 | } | |
2215 | } | |
37109b85 ZJS |
2216 | |
2217 | if (IN_SET(k, CGROUP_IO_READ_BYTES, CGROUP_IO_WRITE_BYTES)) | |
2218 | log_level = raise_level(log_level, | |
2219 | value > MENTIONWORTHY_IO_BYTES, | |
2220 | value > NOTICEWORTHY_IO_BYTES); | |
bc40a20e LP |
2221 | } |
2222 | ||
2223 | if (have_io_accounting) { | |
2224 | if (any_io) { | |
2225 | if (rr) | |
2226 | message_parts[n_message_parts++] = TAKE_PTR(rr); | |
2227 | if (wr) | |
2228 | message_parts[n_message_parts++] = TAKE_PTR(wr); | |
2229 | ||
2230 | } else { | |
2231 | char *k; | |
2232 | ||
2233 | k = strdup("no IO"); | |
2234 | if (!k) { | |
2235 | r = log_oom(); | |
2236 | goto finish; | |
2237 | } | |
2238 | ||
2239 | message_parts[n_message_parts++] = k; | |
2240 | } | |
2241 | } | |
2242 | ||
915b1d01 LP |
2243 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
2244 | char buf[FORMAT_BYTES_MAX] = ""; | |
2245 | uint64_t value = UINT64_MAX; | |
2246 | ||
2247 | assert(ip_fields[m]); | |
2248 | ||
2249 | (void) unit_get_ip_accounting(u, m, &value); | |
2250 | if (value == UINT64_MAX) | |
2251 | continue; | |
82044702 LP |
2252 | |
2253 | have_ip_accounting = true; | |
a87b1faa LP |
2254 | if (value > 0) |
2255 | any_traffic = true; | |
915b1d01 LP |
2256 | |
2257 | /* Format IP accounting data for inclusion in the structured log message */ | |
2258 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2259 | r = log_oom(); | |
2260 | goto finish; | |
2261 | } | |
2262 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2263 | ||
2264 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2265 | * bytes counters (and not for the packets counters) */ | |
a87b1faa LP |
2266 | if (m == CGROUP_IP_INGRESS_BYTES) { |
2267 | assert(!igress); | |
ec9d636b | 2268 | igress = strjoin("received ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2269 | if (!igress) { |
2270 | r = log_oom(); | |
2271 | goto finish; | |
2272 | } | |
2273 | } else if (m == CGROUP_IP_EGRESS_BYTES) { | |
2274 | assert(!egress); | |
ec9d636b | 2275 | egress = strjoin("sent ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2276 | if (!egress) { |
2277 | r = log_oom(); | |
2278 | goto finish; | |
2279 | } | |
2280 | } | |
37109b85 ZJS |
2281 | |
2282 | if (IN_SET(m, CGROUP_IP_INGRESS_BYTES, CGROUP_IP_EGRESS_BYTES)) | |
2283 | log_level = raise_level(log_level, | |
2284 | value > MENTIONWORTHY_IP_BYTES, | |
2285 | value > NOTICEWORTHY_IP_BYTES); | |
a87b1faa LP |
2286 | } |
2287 | ||
82044702 LP |
2288 | if (have_ip_accounting) { |
2289 | if (any_traffic) { | |
2290 | if (igress) | |
2291 | message_parts[n_message_parts++] = TAKE_PTR(igress); | |
2292 | if (egress) | |
2293 | message_parts[n_message_parts++] = TAKE_PTR(egress); | |
a87b1faa | 2294 | |
82044702 LP |
2295 | } else { |
2296 | char *k; | |
915b1d01 | 2297 | |
82044702 LP |
2298 | k = strdup("no IP traffic"); |
2299 | if (!k) { | |
2300 | r = log_oom(); | |
2301 | goto finish; | |
2302 | } | |
2303 | ||
2304 | message_parts[n_message_parts++] = k; | |
2305 | } | |
915b1d01 LP |
2306 | } |
2307 | ||
2308 | /* Is there any accounting data available at all? */ | |
2309 | if (n_iovec == 0) { | |
2310 | r = 0; | |
2311 | goto finish; | |
2312 | } | |
2313 | ||
2314 | if (n_message_parts == 0) | |
a87b1faa | 2315 | t = strjoina("MESSAGE=", u->id, ": Completed."); |
915b1d01 LP |
2316 | else { |
2317 | _cleanup_free_ char *joined; | |
2318 | ||
2319 | message_parts[n_message_parts] = NULL; | |
2320 | ||
2321 | joined = strv_join(message_parts, ", "); | |
2322 | if (!joined) { | |
2323 | r = log_oom(); | |
2324 | goto finish; | |
2325 | } | |
2326 | ||
ec9d636b | 2327 | joined[0] = ascii_toupper(joined[0]); |
a87b1faa | 2328 | t = strjoina("MESSAGE=", u->id, ": ", joined, "."); |
915b1d01 LP |
2329 | } |
2330 | ||
2331 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2332 | * and hence don't increase n_iovec for them */ | |
2333 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2334 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2335 | ||
2336 | t = strjoina(u->manager->unit_log_field, u->id); | |
2337 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2338 | ||
2339 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2340 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2341 | ||
37109b85 | 2342 | log_struct_iovec(log_level, iovec, n_iovec + 4); |
915b1d01 LP |
2343 | r = 0; |
2344 | ||
2345 | finish: | |
2346 | for (i = 0; i < n_message_parts; i++) | |
2347 | free(message_parts[i]); | |
2348 | ||
2349 | for (i = 0; i < n_iovec; i++) | |
2350 | free(iovec[i].iov_base); | |
2351 | ||
2352 | return r; | |
2353 | ||
2354 | } | |
2355 | ||
adefcf28 LP |
2356 | static void unit_update_on_console(Unit *u) { |
2357 | bool b; | |
2358 | ||
2359 | assert(u); | |
2360 | ||
2361 | b = unit_needs_console(u); | |
2362 | if (u->on_console == b) | |
2363 | return; | |
2364 | ||
2365 | u->on_console = b; | |
2366 | if (b) | |
2367 | manager_ref_console(u->manager); | |
2368 | else | |
2369 | manager_unref_console(u->manager); | |
adefcf28 LP |
2370 | } |
2371 | ||
6eb65e7c LP |
2372 | static void unit_emit_audit_start(Unit *u) { |
2373 | assert(u); | |
2374 | ||
2375 | if (u->type != UNIT_SERVICE) | |
2376 | return; | |
2377 | ||
2378 | /* Write audit record if we have just finished starting up */ | |
2379 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); | |
2380 | u->in_audit = true; | |
2381 | } | |
2382 | ||
2383 | static void unit_emit_audit_stop(Unit *u, UnitActiveState state) { | |
2384 | assert(u); | |
2385 | ||
2386 | if (u->type != UNIT_SERVICE) | |
2387 | return; | |
2388 | ||
2389 | if (u->in_audit) { | |
2390 | /* Write audit record if we have just finished shutting down */ | |
2391 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, state == UNIT_INACTIVE); | |
2392 | u->in_audit = false; | |
2393 | } else { | |
2394 | /* Hmm, if there was no start record written write it now, so that we always have a nice pair */ | |
2395 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, state == UNIT_INACTIVE); | |
2396 | ||
2397 | if (state == UNIT_INACTIVE) | |
2398 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); | |
2399 | } | |
2400 | } | |
2401 | ||
16c74914 LP |
2402 | static bool unit_process_job(Job *j, UnitActiveState ns, UnitNotifyFlags flags) { |
2403 | bool unexpected = false; | |
31cd5f63 | 2404 | JobResult result; |
16c74914 LP |
2405 | |
2406 | assert(j); | |
2407 | ||
2408 | if (j->state == JOB_WAITING) | |
2409 | ||
2410 | /* So we reached a different state for this job. Let's see if we can run it now if it failed previously | |
2411 | * due to EAGAIN. */ | |
2412 | job_add_to_run_queue(j); | |
2413 | ||
2414 | /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and | |
2415 | * hence needs to invalidate jobs. */ | |
2416 | ||
2417 | switch (j->type) { | |
2418 | ||
2419 | case JOB_START: | |
2420 | case JOB_VERIFY_ACTIVE: | |
2421 | ||
2422 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
2423 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2424 | else if (j->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
2425 | unexpected = true; | |
2426 | ||
31cd5f63 AZ |
2427 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
2428 | if (ns == UNIT_FAILED) | |
2429 | result = JOB_FAILED; | |
2430 | else if (FLAGS_SET(flags, UNIT_NOTIFY_SKIP_CONDITION)) | |
2431 | result = JOB_SKIPPED; | |
2432 | else | |
2433 | result = JOB_DONE; | |
2434 | ||
2435 | job_finish_and_invalidate(j, result, true, false); | |
2436 | } | |
16c74914 LP |
2437 | } |
2438 | ||
2439 | break; | |
2440 | ||
2441 | case JOB_RELOAD: | |
2442 | case JOB_RELOAD_OR_START: | |
2443 | case JOB_TRY_RELOAD: | |
2444 | ||
2445 | if (j->state == JOB_RUNNING) { | |
2446 | if (ns == UNIT_ACTIVE) | |
2447 | job_finish_and_invalidate(j, (flags & UNIT_NOTIFY_RELOAD_FAILURE) ? JOB_FAILED : JOB_DONE, true, false); | |
2448 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { | |
2449 | unexpected = true; | |
2450 | ||
2451 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2452 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2453 | } | |
2454 | } | |
2455 | ||
2456 | break; | |
2457 | ||
2458 | case JOB_STOP: | |
2459 | case JOB_RESTART: | |
2460 | case JOB_TRY_RESTART: | |
2461 | ||
2462 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2463 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2464 | else if (j->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
2465 | unexpected = true; | |
2466 | job_finish_and_invalidate(j, JOB_FAILED, true, false); | |
2467 | } | |
2468 | ||
2469 | break; | |
2470 | ||
2471 | default: | |
2472 | assert_not_reached("Job type unknown"); | |
2473 | } | |
2474 | ||
2475 | return unexpected; | |
2476 | } | |
2477 | ||
2ad2e41a | 2478 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, UnitNotifyFlags flags) { |
429926e9 | 2479 | const char *reason; |
8559b3b7 | 2480 | Manager *m; |
a096ed36 | 2481 | |
87f0e418 LP |
2482 | assert(u); |
2483 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2484 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2485 | |
8559b3b7 LP |
2486 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2487 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2488 | * remounted this function will be called too! */ | |
87f0e418 | 2489 | |
546ac4f0 MS |
2490 | m = u->manager; |
2491 | ||
3c4832ad LP |
2492 | /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in |
2493 | * the bus queue, so that any job change signal queued will force out the unit change signal first. */ | |
2494 | unit_add_to_dbus_queue(u); | |
2495 | ||
f755e3b7 | 2496 | /* Update timestamps for state changes */ |
2c289ea8 | 2497 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2498 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2499 | |
bdbf9951 | 2500 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2501 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2502 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2503 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2504 | |
2505 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2506 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2507 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2508 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2509 | } |
87f0e418 | 2510 | |
865cc19a | 2511 | /* Keep track of failed units */ |
8724defe | 2512 | (void) manager_update_failed_units(m, u, ns == UNIT_FAILED); |
f755e3b7 | 2513 | |
d3070fbd LP |
2514 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2515 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
efdb0237 | 2516 | unit_prune_cgroup(u); |
d3070fbd LP |
2517 | unit_unlink_state_files(u); |
2518 | } | |
fb385181 | 2519 | |
adefcf28 | 2520 | unit_update_on_console(u); |
7ed9f6cd | 2521 | |
2c289ea8 | 2522 | if (!MANAGER_IS_RELOADING(m)) { |
a1c7334b LP |
2523 | bool unexpected; |
2524 | ||
2525 | /* Let's propagate state changes to the job */ | |
2526 | if (u->job) | |
2527 | unexpected = unit_process_job(u->job, ns, flags); | |
2528 | else | |
2529 | unexpected = true; | |
f3bff0eb | 2530 | |
a1c7334b LP |
2531 | /* If this state change happened without being requested by a job, then let's retroactively start or |
2532 | * stop dependencies. We skip that step when deserializing, since we don't want to create any | |
2533 | * additional jobs just because something is already activated. */ | |
bdbf9951 LP |
2534 | |
2535 | if (unexpected) { | |
2536 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2537 | retroactively_start_dependencies(u); | |
2538 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2539 | retroactively_stop_dependencies(u); | |
2540 | } | |
5de9682c | 2541 | |
cd0504d0 | 2542 | /* stop unneeded units regardless if going down was expected or not */ |
a3c1168a | 2543 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
cd0504d0 MS |
2544 | check_unneeded_dependencies(u); |
2545 | ||
bdbf9951 | 2546 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2547 | log_unit_debug(u, "Unit entered failed state."); |
2ad2e41a LP |
2548 | |
2549 | if (!(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
2550 | unit_start_on_failure(u); | |
cd6d0a45 | 2551 | } |
e537352b | 2552 | |
256f65d0 LP |
2553 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns) && !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
2554 | /* This unit just finished starting up */ | |
3b2775c5 | 2555 | |
6eb65e7c | 2556 | unit_emit_audit_start(u); |
546ac4f0 | 2557 | manager_send_unit_plymouth(m, u); |
256f65d0 | 2558 | } |
bdbf9951 | 2559 | |
256f65d0 | 2560 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && !UNIT_IS_INACTIVE_OR_FAILED(os)) { |
915b1d01 | 2561 | /* This unit just stopped/failed. */ |
256f65d0 | 2562 | |
6eb65e7c | 2563 | unit_emit_audit_stop(u, ns); |
915b1d01 | 2564 | unit_log_resources(u); |
cd6d0a45 | 2565 | } |
f278026d LP |
2566 | } |
2567 | ||
31dc1ca3 LP |
2568 | manager_recheck_journal(m); |
2569 | manager_recheck_dbus(m); | |
e63ebf71 | 2570 | |
3ecaa09b | 2571 | unit_trigger_notify(u); |
3b2775c5 | 2572 | |
8724defe | 2573 | if (!MANAGER_IS_RELOADING(m)) { |
8559b3b7 | 2574 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ |
fda09318 | 2575 | unit_submit_to_stop_when_unneeded_queue(u); |
c1e1601e | 2576 | |
8559b3b7 LP |
2577 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens when |
2578 | * something BindsTo= to a Type=oneshot unit, as these units go directly from starting to inactive, | |
ff502445 LP |
2579 | * without ever entering started.) */ |
2580 | unit_check_binds_to(u); | |
53c35a76 | 2581 | |
429926e9 TR |
2582 | if (os != UNIT_FAILED && ns == UNIT_FAILED) { |
2583 | reason = strjoina("unit ", u->id, " failed"); | |
36c4dc08 | 2584 | emergency_action(m, u->failure_action, 0, u->reboot_arg, unit_failure_action_exit_status(u), reason); |
429926e9 TR |
2585 | } else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) { |
2586 | reason = strjoina("unit ", u->id, " succeeded"); | |
36c4dc08 | 2587 | emergency_action(m, u->success_action, 0, u->reboot_arg, unit_success_action_exit_status(u), reason); |
429926e9 | 2588 | } |
ff502445 LP |
2589 | } |
2590 | ||
701cc384 | 2591 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2592 | } |
2593 | ||
f75f613d | 2594 | int unit_watch_pid(Unit *u, pid_t pid, bool exclusive) { |
62a76913 | 2595 | int r; |
a911bb9a | 2596 | |
87f0e418 | 2597 | assert(u); |
62a76913 | 2598 | assert(pid_is_valid(pid)); |
87f0e418 | 2599 | |
62a76913 | 2600 | /* Watch a specific PID */ |
5ba6985b | 2601 | |
f75f613d FB |
2602 | /* Caller might be sure that this PID belongs to this unit only. Let's take this |
2603 | * opportunity to remove any stalled references to this PID as they can be created | |
2604 | * easily (when watching a process which is not our direct child). */ | |
2605 | if (exclusive) | |
2606 | manager_unwatch_pid(u->manager, pid); | |
2607 | ||
d5099efc | 2608 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2609 | if (r < 0) |
2610 | return r; | |
2611 | ||
62a76913 | 2612 | r = hashmap_ensure_allocated(&u->manager->watch_pids, NULL); |
a911bb9a LP |
2613 | if (r < 0) |
2614 | return r; | |
2615 | ||
62a76913 LP |
2616 | /* First try, let's add the unit keyed by "pid". */ |
2617 | r = hashmap_put(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2618 | if (r == -EEXIST) { | |
2619 | Unit **array; | |
2620 | bool found = false; | |
2621 | size_t n = 0; | |
05e343b7 | 2622 | |
62a76913 LP |
2623 | /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points |
2624 | * to an array of Units rather than just a Unit), lists us already. */ | |
a911bb9a | 2625 | |
62a76913 LP |
2626 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); |
2627 | if (array) | |
2628 | for (; array[n]; n++) | |
2629 | if (array[n] == u) | |
2630 | found = true; | |
a911bb9a | 2631 | |
62a76913 LP |
2632 | if (found) /* Found it already? if so, do nothing */ |
2633 | r = 0; | |
2634 | else { | |
2635 | Unit **new_array; | |
2636 | ||
2637 | /* Allocate a new array */ | |
2638 | new_array = new(Unit*, n + 2); | |
2639 | if (!new_array) | |
2640 | return -ENOMEM; | |
2641 | ||
2642 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2643 | new_array[n] = u; | |
2644 | new_array[n+1] = NULL; | |
2645 | ||
2646 | /* Add or replace the old array */ | |
2647 | r = hashmap_replace(u->manager->watch_pids, PID_TO_PTR(-pid), new_array); | |
2648 | if (r < 0) { | |
2649 | free(new_array); | |
2650 | return r; | |
2651 | } | |
2652 | ||
2653 | free(array); | |
2654 | } | |
2655 | } else if (r < 0) | |
2656 | return r; | |
2657 | ||
2658 | r = set_put(u->pids, PID_TO_PTR(pid)); | |
2659 | if (r < 0) | |
2660 | return r; | |
2661 | ||
2662 | return 0; | |
87f0e418 LP |
2663 | } |
2664 | ||
2665 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
62a76913 LP |
2666 | Unit **array; |
2667 | ||
87f0e418 | 2668 | assert(u); |
62a76913 LP |
2669 | assert(pid_is_valid(pid)); |
2670 | ||
2671 | /* First let's drop the unit in case it's keyed as "pid". */ | |
2672 | (void) hashmap_remove_value(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2673 | ||
2674 | /* Then, let's also drop the unit, in case it's in the array keyed by -pid */ | |
2675 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); | |
2676 | if (array) { | |
2677 | size_t n, m = 0; | |
2678 | ||
2679 | /* Let's iterate through the array, dropping our own entry */ | |
2680 | for (n = 0; array[n]; n++) | |
2681 | if (array[n] != u) | |
2682 | array[m++] = array[n]; | |
2683 | array[m] = NULL; | |
2684 | ||
2685 | if (m == 0) { | |
2686 | /* The array is now empty, remove the entire entry */ | |
2687 | assert(hashmap_remove(u->manager->watch_pids, PID_TO_PTR(-pid)) == array); | |
2688 | free(array); | |
2689 | } | |
2690 | } | |
87f0e418 | 2691 | |
fea72cc0 | 2692 | (void) set_remove(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2693 | } |
2694 | ||
bd44e61b LP |
2695 | void unit_unwatch_all_pids(Unit *u) { |
2696 | assert(u); | |
2697 | ||
2698 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2699 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2700 | |
efdb0237 | 2701 | u->pids = set_free(u->pids); |
a911bb9a LP |
2702 | } |
2703 | ||
50be4f4a LP |
2704 | static void unit_tidy_watch_pids(Unit *u) { |
2705 | pid_t except1, except2; | |
a911bb9a LP |
2706 | Iterator i; |
2707 | void *e; | |
2708 | ||
2709 | assert(u); | |
2710 | ||
2711 | /* Cleans dead PIDs from our list */ | |
2712 | ||
50be4f4a LP |
2713 | except1 = unit_main_pid(u); |
2714 | except2 = unit_control_pid(u); | |
2715 | ||
a911bb9a | 2716 | SET_FOREACH(e, u->pids, i) { |
fea72cc0 | 2717 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2718 | |
2719 | if (pid == except1 || pid == except2) | |
2720 | continue; | |
2721 | ||
9f5650ae | 2722 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2723 | unit_unwatch_pid(u, pid); |
a911bb9a | 2724 | } |
87f0e418 LP |
2725 | } |
2726 | ||
50be4f4a LP |
2727 | static int on_rewatch_pids_event(sd_event_source *s, void *userdata) { |
2728 | Unit *u = userdata; | |
2729 | ||
2730 | assert(s); | |
2731 | assert(u); | |
2732 | ||
2733 | unit_tidy_watch_pids(u); | |
2734 | unit_watch_all_pids(u); | |
2735 | ||
2736 | /* If the PID set is empty now, then let's finish this off. */ | |
2737 | unit_synthesize_cgroup_empty_event(u); | |
2738 | ||
2739 | return 0; | |
2740 | } | |
2741 | ||
2742 | int unit_enqueue_rewatch_pids(Unit *u) { | |
2743 | int r; | |
2744 | ||
2745 | assert(u); | |
2746 | ||
2747 | if (!u->cgroup_path) | |
2748 | return -ENOENT; | |
2749 | ||
2750 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
2751 | if (r < 0) | |
2752 | return r; | |
2753 | if (r > 0) /* On unified we can use proper notifications */ | |
2754 | return 0; | |
2755 | ||
2756 | /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new | |
2757 | * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it | |
2758 | * involves issuing kill(pid, 0) on all processes we watch. */ | |
2759 | ||
2760 | if (!u->rewatch_pids_event_source) { | |
2761 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
2762 | ||
2763 | r = sd_event_add_defer(u->manager->event, &s, on_rewatch_pids_event, u); | |
2764 | if (r < 0) | |
2765 | return log_error_errno(r, "Failed to allocate event source for tidying watched PIDs: %m"); | |
2766 | ||
2767 | r = sd_event_source_set_priority(s, SD_EVENT_PRIORITY_IDLE); | |
2768 | if (r < 0) | |
28b77ab2 | 2769 | return log_error_errno(r, "Failed to adjust priority of event source for tidying watched PIDs: %m"); |
50be4f4a LP |
2770 | |
2771 | (void) sd_event_source_set_description(s, "tidy-watch-pids"); | |
2772 | ||
2773 | u->rewatch_pids_event_source = TAKE_PTR(s); | |
2774 | } | |
2775 | ||
2776 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_ONESHOT); | |
2777 | if (r < 0) | |
2778 | return log_error_errno(r, "Failed to enable event source for tidying watched PIDs: %m"); | |
2779 | ||
2780 | return 0; | |
2781 | } | |
2782 | ||
2783 | void unit_dequeue_rewatch_pids(Unit *u) { | |
2784 | int r; | |
2785 | assert(u); | |
2786 | ||
2787 | if (!u->rewatch_pids_event_source) | |
2788 | return; | |
2789 | ||
2790 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_OFF); | |
2791 | if (r < 0) | |
2792 | log_warning_errno(r, "Failed to disable event source for tidying watched PIDs, ignoring: %m"); | |
2793 | ||
2794 | u->rewatch_pids_event_source = sd_event_source_unref(u->rewatch_pids_event_source); | |
2795 | } | |
2796 | ||
87f0e418 LP |
2797 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2798 | assert(u); | |
2799 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2800 | ||
2801 | switch (j) { | |
2802 | ||
2803 | case JOB_VERIFY_ACTIVE: | |
2804 | case JOB_START: | |
e0209d83 | 2805 | case JOB_NOP: |
f5869324 LP |
2806 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
2807 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueing | |
2808 | * jobs for it. */ | |
87f0e418 LP |
2809 | return true; |
2810 | ||
f5869324 LP |
2811 | case JOB_STOP: |
2812 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
2813 | * external events), hence it makes no sense to permit enqueing such a request either. */ | |
2814 | return !u->perpetual; | |
2815 | ||
87f0e418 LP |
2816 | case JOB_RESTART: |
2817 | case JOB_TRY_RESTART: | |
f5869324 | 2818 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
2819 | |
2820 | case JOB_RELOAD: | |
3282591d | 2821 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2822 | return unit_can_reload(u); |
2823 | ||
2824 | case JOB_RELOAD_OR_START: | |
2825 | return unit_can_reload(u) && unit_can_start(u); | |
2826 | ||
2827 | default: | |
2828 | assert_not_reached("Invalid job type"); | |
2829 | } | |
2830 | } | |
2831 | ||
f2341e0a LP |
2832 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2833 | assert(u); | |
d1fab3fe | 2834 | |
f2341e0a LP |
2835 | /* Only warn about some unit types */ |
2836 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2837 | return; | |
3f3cc397 | 2838 | |
f2341e0a LP |
2839 | if (streq_ptr(u->id, other)) |
2840 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2841 | else | |
2842 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2843 | } |
2844 | ||
eef85c4a LP |
2845 | static int unit_add_dependency_hashmap( |
2846 | Hashmap **h, | |
2847 | Unit *other, | |
2848 | UnitDependencyMask origin_mask, | |
2849 | UnitDependencyMask destination_mask) { | |
2850 | ||
2851 | UnitDependencyInfo info; | |
2852 | int r; | |
2853 | ||
2854 | assert(h); | |
2855 | assert(other); | |
2856 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2857 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
2858 | assert(origin_mask > 0 || destination_mask > 0); | |
2859 | ||
2860 | r = hashmap_ensure_allocated(h, NULL); | |
2861 | if (r < 0) | |
2862 | return r; | |
2863 | ||
2864 | assert_cc(sizeof(void*) == sizeof(info)); | |
2865 | ||
2866 | info.data = hashmap_get(*h, other); | |
2867 | if (info.data) { | |
2868 | /* Entry already exists. Add in our mask. */ | |
2869 | ||
d94a24ca ZJS |
2870 | if (FLAGS_SET(origin_mask, info.origin_mask) && |
2871 | FLAGS_SET(destination_mask, info.destination_mask)) | |
eef85c4a LP |
2872 | return 0; /* NOP */ |
2873 | ||
2874 | info.origin_mask |= origin_mask; | |
2875 | info.destination_mask |= destination_mask; | |
2876 | ||
2877 | r = hashmap_update(*h, other, info.data); | |
2878 | } else { | |
2879 | info = (UnitDependencyInfo) { | |
2880 | .origin_mask = origin_mask, | |
2881 | .destination_mask = destination_mask, | |
2882 | }; | |
2883 | ||
2884 | r = hashmap_put(*h, other, info.data); | |
2885 | } | |
2886 | if (r < 0) | |
2887 | return r; | |
2888 | ||
2889 | return 1; | |
2890 | } | |
2891 | ||
2892 | int unit_add_dependency( | |
2893 | Unit *u, | |
2894 | UnitDependency d, | |
2895 | Unit *other, | |
2896 | bool add_reference, | |
2897 | UnitDependencyMask mask) { | |
87f0e418 LP |
2898 | |
2899 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2900 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 2901 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 2902 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 2903 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2904 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 2905 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 2906 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 2907 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 2908 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2909 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2910 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2911 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2912 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2913 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2914 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2915 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2916 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2917 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2918 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2919 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2920 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2921 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2922 | }; |
eef85c4a LP |
2923 | Unit *original_u = u, *original_other = other; |
2924 | int r; | |
87f0e418 LP |
2925 | |
2926 | assert(u); | |
2927 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2928 | assert(other); |
2929 | ||
9f151f29 LP |
2930 | u = unit_follow_merge(u); |
2931 | other = unit_follow_merge(other); | |
2932 | ||
87f0e418 LP |
2933 | /* We won't allow dependencies on ourselves. We will not |
2934 | * consider them an error however. */ | |
d1fab3fe | 2935 | if (u == other) { |
eef85c4a | 2936 | maybe_warn_about_dependency(original_u, original_other->id, d); |
87f0e418 | 2937 | return 0; |
d1fab3fe | 2938 | } |
87f0e418 | 2939 | |
c80a9a33 LP |
2940 | if (d == UNIT_AFTER && UNIT_VTABLE(u)->refuse_after) { |
2941 | log_unit_warning(u, "Requested dependency After=%s ignored (%s units cannot be delayed).", other->id, unit_type_to_string(u->type)); | |
dd5e7000 ZJS |
2942 | return 0; |
2943 | } | |
2944 | ||
c80a9a33 LP |
2945 | if (d == UNIT_BEFORE && UNIT_VTABLE(other)->refuse_after) { |
2946 | log_unit_warning(u, "Requested dependency Before=%s ignored (%s units cannot be delayed).", other->id, unit_type_to_string(other->type)); | |
2947 | return 0; | |
2948 | } | |
2949 | ||
2950 | if (d == UNIT_ON_FAILURE && !UNIT_VTABLE(u)->can_fail) { | |
2951 | log_unit_warning(u, "Requested dependency OnFailure=%s ignored (%s units cannot fail).", other->id, unit_type_to_string(u->type)); | |
2952 | return 0; | |
2953 | } | |
2954 | ||
2955 | if (d == UNIT_TRIGGERS && !UNIT_VTABLE(u)->can_trigger) | |
2956 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
2957 | "Requested dependency Triggers=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(u->type)); | |
2958 | if (d == UNIT_TRIGGERED_BY && !UNIT_VTABLE(other)->can_trigger) | |
2959 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
2960 | "Requested dependency TriggeredBy=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(other->type)); | |
2961 | ||
eef85c4a | 2962 | r = unit_add_dependency_hashmap(u->dependencies + d, other, mask, 0); |
613b411c | 2963 | if (r < 0) |
87f0e418 LP |
2964 | return r; |
2965 | ||
eef85c4a LP |
2966 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2967 | r = unit_add_dependency_hashmap(other->dependencies + inverse_table[d], u, 0, mask); | |
613b411c LP |
2968 | if (r < 0) |
2969 | return r; | |
2970 | } | |
2971 | ||
2972 | if (add_reference) { | |
eef85c4a | 2973 | r = unit_add_dependency_hashmap(u->dependencies + UNIT_REFERENCES, other, mask, 0); |
613b411c | 2974 | if (r < 0) |
5de9682c LP |
2975 | return r; |
2976 | ||
eef85c4a | 2977 | r = unit_add_dependency_hashmap(other->dependencies + UNIT_REFERENCED_BY, u, 0, mask); |
613b411c | 2978 | if (r < 0) |
701cc384 | 2979 | return r; |
613b411c | 2980 | } |
87f0e418 | 2981 | |
c1e1601e | 2982 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
2983 | return 0; |
2984 | } | |
0301abf4 | 2985 | |
eef85c4a | 2986 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
2c966c03 LP |
2987 | int r; |
2988 | ||
2989 | assert(u); | |
2990 | ||
eef85c4a | 2991 | r = unit_add_dependency(u, d, other, add_reference, mask); |
3f3cc397 | 2992 | if (r < 0) |
2c966c03 LP |
2993 | return r; |
2994 | ||
eef85c4a | 2995 | return unit_add_dependency(u, e, other, add_reference, mask); |
2c966c03 LP |
2996 | } |
2997 | ||
23e8c796 | 2998 | static int resolve_template(Unit *u, const char *name, char **buf, const char **ret) { |
7410616c | 2999 | int r; |
9e2f7c11 LP |
3000 | |
3001 | assert(u); | |
23e8c796 | 3002 | assert(name); |
7410616c LP |
3003 | assert(buf); |
3004 | assert(ret); | |
9e2f7c11 | 3005 | |
7410616c LP |
3006 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
3007 | *buf = NULL; | |
3008 | *ret = name; | |
3009 | return 0; | |
9e2f7c11 LP |
3010 | } |
3011 | ||
ac155bb8 | 3012 | if (u->instance) |
7410616c | 3013 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 3014 | else { |
ae018d9b | 3015 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 3016 | |
7410616c LP |
3017 | r = unit_name_to_prefix(u->id, &i); |
3018 | if (r < 0) | |
3019 | return r; | |
9e2f7c11 | 3020 | |
7410616c | 3021 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 3022 | } |
7410616c LP |
3023 | if (r < 0) |
3024 | return r; | |
9e2f7c11 | 3025 | |
7410616c LP |
3026 | *ret = *buf; |
3027 | return 0; | |
9e2f7c11 LP |
3028 | } |
3029 | ||
35d8c19a | 3030 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3031 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
3032 | Unit *other; |
3033 | int r; | |
3034 | ||
9e2f7c11 | 3035 | assert(u); |
35d8c19a | 3036 | assert(name); |
09b6b09f | 3037 | |
23e8c796 | 3038 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3039 | if (r < 0) |
3040 | return r; | |
09b6b09f | 3041 | |
35d8c19a | 3042 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
8afbb8e1 LP |
3043 | if (r < 0) |
3044 | return r; | |
9e2f7c11 | 3045 | |
eef85c4a | 3046 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
3047 | } |
3048 | ||
5a724170 | 3049 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3050 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
3051 | Unit *other; |
3052 | int r; | |
2c966c03 LP |
3053 | |
3054 | assert(u); | |
5a724170 | 3055 | assert(name); |
2c966c03 | 3056 | |
23e8c796 | 3057 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3058 | if (r < 0) |
3059 | return r; | |
2c966c03 | 3060 | |
5a724170 | 3061 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
3f3cc397 | 3062 | if (r < 0) |
68eda4bd | 3063 | return r; |
2c966c03 | 3064 | |
eef85c4a | 3065 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
3066 | } |
3067 | ||
0301abf4 | 3068 | int set_unit_path(const char *p) { |
0301abf4 | 3069 | /* This is mostly for debug purposes */ |
cbe46ead | 3070 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 3071 | return -errno; |
0301abf4 LP |
3072 | |
3073 | return 0; | |
3074 | } | |
88066b3a | 3075 | |
ea430986 | 3076 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
3077 | assert(u); |
3078 | ||
ac155bb8 | 3079 | if (!u->id) |
04ade7d2 LP |
3080 | return NULL; |
3081 | ||
48899192 | 3082 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
3083 | } |
3084 | ||
4b58153d LP |
3085 | char *unit_dbus_path_invocation_id(Unit *u) { |
3086 | assert(u); | |
3087 | ||
3088 | if (sd_id128_is_null(u->invocation_id)) | |
3089 | return NULL; | |
3090 | ||
3091 | return unit_dbus_path_from_name(u->invocation_id_string); | |
3092 | } | |
3093 | ||
d79200e2 LP |
3094 | int unit_set_slice(Unit *u, Unit *slice) { |
3095 | assert(u); | |
3096 | assert(slice); | |
3097 | ||
3098 | /* Sets the unit slice if it has not been set before. Is extra | |
3099 | * careful, to only allow this for units that actually have a | |
3100 | * cgroup context. Also, we don't allow to set this for slices | |
3101 | * (since the parent slice is derived from the name). Make | |
3102 | * sure the unit we set is actually a slice. */ | |
3103 | ||
3104 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3105 | return -EOPNOTSUPP; | |
3106 | ||
3107 | if (u->type == UNIT_SLICE) | |
3108 | return -EINVAL; | |
3109 | ||
102ef982 LP |
3110 | if (unit_active_state(u) != UNIT_INACTIVE) |
3111 | return -EBUSY; | |
3112 | ||
d79200e2 LP |
3113 | if (slice->type != UNIT_SLICE) |
3114 | return -EINVAL; | |
3115 | ||
efdb0237 LP |
3116 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
3117 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
3118 | return -EPERM; | |
3119 | ||
d79200e2 LP |
3120 | if (UNIT_DEREF(u->slice) == slice) |
3121 | return 0; | |
3122 | ||
99e66921 TH |
3123 | /* Disallow slice changes if @u is already bound to cgroups */ |
3124 | if (UNIT_ISSET(u->slice) && u->cgroup_realized) | |
d79200e2 LP |
3125 | return -EBUSY; |
3126 | ||
7f7d01ed | 3127 | unit_ref_set(&u->slice, u, slice); |
d79200e2 LP |
3128 | return 1; |
3129 | } | |
3130 | ||
3131 | int unit_set_default_slice(Unit *u) { | |
a8833944 | 3132 | const char *slice_name; |
a016b922 LP |
3133 | Unit *slice; |
3134 | int r; | |
3135 | ||
3136 | assert(u); | |
3137 | ||
9444b1f2 | 3138 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
3139 | return 0; |
3140 | ||
a8833944 LP |
3141 | if (u->instance) { |
3142 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 3143 | |
a8833944 LP |
3144 | /* Implicitly place all instantiated units in their |
3145 | * own per-template slice */ | |
3146 | ||
7410616c LP |
3147 | r = unit_name_to_prefix(u->id, &prefix); |
3148 | if (r < 0) | |
3149 | return r; | |
a8833944 LP |
3150 | |
3151 | /* The prefix is already escaped, but it might include | |
3152 | * "-" which has a special meaning for slice units, | |
3153 | * hence escape it here extra. */ | |
7410616c | 3154 | escaped = unit_name_escape(prefix); |
a8833944 LP |
3155 | if (!escaped) |
3156 | return -ENOMEM; | |
3157 | ||
463d0d15 | 3158 | if (MANAGER_IS_SYSTEM(u->manager)) |
00e7b3c8 | 3159 | slice_name = strjoina("system-", escaped, ".slice"); |
a8833944 | 3160 | else |
00e7b3c8 | 3161 | slice_name = strjoina(escaped, ".slice"); |
a8833944 LP |
3162 | } else |
3163 | slice_name = | |
463d0d15 | 3164 | MANAGER_IS_SYSTEM(u->manager) && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
3165 | ? SPECIAL_SYSTEM_SLICE |
3166 | : SPECIAL_ROOT_SLICE; | |
3167 | ||
3168 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
3169 | if (r < 0) |
3170 | return r; | |
3171 | ||
d79200e2 | 3172 | return unit_set_slice(u, slice); |
a016b922 LP |
3173 | } |
3174 | ||
9444b1f2 LP |
3175 | const char *unit_slice_name(Unit *u) { |
3176 | assert(u); | |
3177 | ||
3178 | if (!UNIT_ISSET(u->slice)) | |
3179 | return NULL; | |
3180 | ||
3181 | return UNIT_DEREF(u->slice)->id; | |
3182 | } | |
3183 | ||
f6ff8c29 | 3184 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 3185 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
3186 | int r; |
3187 | ||
3188 | assert(u); | |
3189 | assert(type); | |
3190 | assert(_found); | |
3191 | ||
7410616c LP |
3192 | r = unit_name_change_suffix(u->id, type, &t); |
3193 | if (r < 0) | |
3194 | return r; | |
3195 | if (unit_has_name(u, t)) | |
3196 | return -EINVAL; | |
f6ff8c29 | 3197 | |
ac155bb8 | 3198 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3199 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3200 | return r; |
3201 | } | |
3202 | ||
bbc29086 | 3203 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
fc67a943 | 3204 | const char *new_owner; |
bbc29086 DM |
3205 | Unit *u = userdata; |
3206 | int r; | |
3207 | ||
3208 | assert(message); | |
3209 | assert(u); | |
3210 | ||
fc67a943 | 3211 | r = sd_bus_message_read(message, "sss", NULL, NULL, &new_owner); |
bbc29086 DM |
3212 | if (r < 0) { |
3213 | bus_log_parse_error(r); | |
3214 | return 0; | |
3215 | } | |
3216 | ||
3217 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3218 | UNIT_VTABLE(u)->bus_name_owner_change(u, empty_to_null(new_owner)); |
a5a8776a MJ |
3219 | |
3220 | return 0; | |
3221 | } | |
3222 | ||
3223 | static int get_name_owner_handler(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
3224 | const sd_bus_error *e; | |
3225 | const char *new_owner; | |
3226 | Unit *u = userdata; | |
3227 | int r; | |
3228 | ||
3229 | assert(message); | |
3230 | assert(u); | |
3231 | ||
3232 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); | |
3233 | ||
a5a8776a | 3234 | e = sd_bus_message_get_error(message); |
a5a8776a | 3235 | if (e) { |
a54654ba LP |
3236 | if (!sd_bus_error_has_name(e, "org.freedesktop.DBus.Error.NameHasNoOwner")) |
3237 | log_unit_error(u, "Unexpected error response from GetNameOwner(): %s", e->message); | |
a5a8776a | 3238 | |
fc67a943 LP |
3239 | new_owner = NULL; |
3240 | } else { | |
3241 | r = sd_bus_message_read(message, "s", &new_owner); | |
3242 | if (r < 0) | |
3243 | return bus_log_parse_error(r); | |
a5a8776a | 3244 | |
fc67a943 LP |
3245 | assert(!isempty(new_owner)); |
3246 | } | |
a5a8776a MJ |
3247 | |
3248 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3249 | UNIT_VTABLE(u)->bus_name_owner_change(u, new_owner); |
bbc29086 DM |
3250 | |
3251 | return 0; | |
3252 | } | |
3253 | ||
9806e87d LP |
3254 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3255 | const char *match; | |
a5b07847 | 3256 | int r; |
bbc29086 | 3257 | |
9806e87d LP |
3258 | assert(u); |
3259 | assert(bus); | |
3260 | assert(name); | |
bbc29086 | 3261 | |
a5b07847 | 3262 | if (u->match_bus_slot || u->get_name_owner_slot) |
bbc29086 DM |
3263 | return -EBUSY; |
3264 | ||
9806e87d | 3265 | match = strjoina("type='signal'," |
81d62103 ZJS |
3266 | "sender='org.freedesktop.DBus'," |
3267 | "path='/org/freedesktop/DBus'," | |
3268 | "interface='org.freedesktop.DBus'," | |
3269 | "member='NameOwnerChanged'," | |
3270 | "arg0='", name, "'"); | |
bbc29086 | 3271 | |
a5b07847 | 3272 | r = sd_bus_add_match_async(bus, &u->match_bus_slot, match, signal_name_owner_changed, NULL, u); |
a5a8776a MJ |
3273 | if (r < 0) |
3274 | return r; | |
3275 | ||
a5b07847 LP |
3276 | r = sd_bus_call_method_async( |
3277 | bus, | |
3278 | &u->get_name_owner_slot, | |
3279 | "org.freedesktop.DBus", | |
3280 | "/org/freedesktop/DBus", | |
3281 | "org.freedesktop.DBus", | |
3282 | "GetNameOwner", | |
3283 | get_name_owner_handler, | |
3284 | u, | |
3285 | "s", name); | |
3286 | if (r < 0) { | |
3287 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3288 | return r; | |
3289 | } | |
3290 | ||
3291 | log_unit_debug(u, "Watching D-Bus name '%s'.", name); | |
3292 | return 0; | |
bbc29086 DM |
3293 | } |
3294 | ||
05e343b7 | 3295 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3296 | int r; |
3297 | ||
05e343b7 LP |
3298 | assert(u); |
3299 | assert(name); | |
3300 | ||
3301 | /* Watch a specific name on the bus. We only support one unit | |
3302 | * watching each name for now. */ | |
3303 | ||
bbc29086 DM |
3304 | if (u->manager->api_bus) { |
3305 | /* If the bus is already available, install the match directly. | |
3306 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3307 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3308 | if (r < 0) |
8ea823b6 | 3309 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3310 | } |
3311 | ||
3312 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3313 | if (r < 0) { | |
3314 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
a5b07847 | 3315 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
bbc29086 DM |
3316 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); |
3317 | } | |
3318 | ||
3319 | return 0; | |
05e343b7 LP |
3320 | } |
3321 | ||
3322 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3323 | assert(u); | |
3324 | assert(name); | |
3325 | ||
8367fea5 | 3326 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3327 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
a5a8776a | 3328 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
05e343b7 LP |
3329 | } |
3330 | ||
a16e1123 LP |
3331 | bool unit_can_serialize(Unit *u) { |
3332 | assert(u); | |
3333 | ||
3334 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
3335 | } | |
3336 | ||
d68c645b | 3337 | static int serialize_cgroup_mask(FILE *f, const char *key, CGroupMask mask) { |
8b108bd0 | 3338 | _cleanup_free_ char *s = NULL; |
d68c645b | 3339 | int r; |
8b108bd0 FB |
3340 | |
3341 | assert(f); | |
3342 | assert(key); | |
3343 | ||
d68c645b LP |
3344 | if (mask == 0) |
3345 | return 0; | |
3346 | ||
3347 | r = cg_mask_to_string(mask, &s); | |
3348 | if (r < 0) | |
3349 | return log_error_errno(r, "Failed to format cgroup mask: %m"); | |
3350 | ||
3351 | return serialize_item(f, key, s); | |
8b108bd0 FB |
3352 | } |
3353 | ||
b82f71c7 | 3354 | static const char *const ip_accounting_metric_field[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { |
6b659ed8 LP |
3355 | [CGROUP_IP_INGRESS_BYTES] = "ip-accounting-ingress-bytes", |
3356 | [CGROUP_IP_INGRESS_PACKETS] = "ip-accounting-ingress-packets", | |
3357 | [CGROUP_IP_EGRESS_BYTES] = "ip-accounting-egress-bytes", | |
3358 | [CGROUP_IP_EGRESS_PACKETS] = "ip-accounting-egress-packets", | |
3359 | }; | |
3360 | ||
fbe14fc9 LP |
3361 | static const char *const io_accounting_metric_field_base[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
3362 | [CGROUP_IO_READ_BYTES] = "io-accounting-read-bytes-base", | |
3363 | [CGROUP_IO_WRITE_BYTES] = "io-accounting-write-bytes-base", | |
3364 | [CGROUP_IO_READ_OPERATIONS] = "io-accounting-read-operations-base", | |
3365 | [CGROUP_IO_WRITE_OPERATIONS] = "io-accounting-write-operations-base", | |
3366 | }; | |
3367 | ||
3368 | static const char *const io_accounting_metric_field_last[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { | |
3369 | [CGROUP_IO_READ_BYTES] = "io-accounting-read-bytes-last", | |
3370 | [CGROUP_IO_WRITE_BYTES] = "io-accounting-write-bytes-last", | |
3371 | [CGROUP_IO_READ_OPERATIONS] = "io-accounting-read-operations-last", | |
3372 | [CGROUP_IO_WRITE_OPERATIONS] = "io-accounting-write-operations-last", | |
3373 | }; | |
3374 | ||
6b78f9b4 | 3375 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
6b659ed8 | 3376 | CGroupIPAccountingMetric m; |
a16e1123 LP |
3377 | int r; |
3378 | ||
3379 | assert(u); | |
3380 | assert(f); | |
3381 | assert(fds); | |
3382 | ||
9bdb98c5 | 3383 | if (unit_can_serialize(u)) { |
9bdb98c5 | 3384 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
3385 | if (r < 0) |
3386 | return r; | |
e0209d83 MS |
3387 | } |
3388 | ||
d68c645b | 3389 | (void) serialize_dual_timestamp(f, "state-change-timestamp", &u->state_change_timestamp); |
a483fb59 | 3390 | |
d68c645b LP |
3391 | (void) serialize_dual_timestamp(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
3392 | (void) serialize_dual_timestamp(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
3393 | (void) serialize_dual_timestamp(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
3394 | (void) serialize_dual_timestamp(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
a483fb59 | 3395 | |
d68c645b LP |
3396 | (void) serialize_dual_timestamp(f, "condition-timestamp", &u->condition_timestamp); |
3397 | (void) serialize_dual_timestamp(f, "assert-timestamp", &u->assert_timestamp); | |
2791a8f8 | 3398 | |
ac155bb8 | 3399 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
d68c645b | 3400 | (void) serialize_bool(f, "condition-result", u->condition_result); |
10717a1a | 3401 | |
59fccdc5 | 3402 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
d68c645b | 3403 | (void) serialize_bool(f, "assert-result", u->assert_result); |
59fccdc5 | 3404 | |
d68c645b LP |
3405 | (void) serialize_bool(f, "transient", u->transient); |
3406 | (void) serialize_bool(f, "in-audit", u->in_audit); | |
fe700f46 | 3407 | |
d68c645b LP |
3408 | (void) serialize_bool(f, "exported-invocation-id", u->exported_invocation_id); |
3409 | (void) serialize_bool(f, "exported-log-level-max", u->exported_log_level_max); | |
3410 | (void) serialize_bool(f, "exported-log-extra-fields", u->exported_log_extra_fields); | |
5ac1530e ZJS |
3411 | (void) serialize_bool(f, "exported-log-rate-limit-interval", u->exported_log_ratelimit_interval); |
3412 | (void) serialize_bool(f, "exported-log-rate-limit-burst", u->exported_log_ratelimit_burst); | |
0e699122 | 3413 | |
d68c645b | 3414 | (void) serialize_item_format(f, "cpu-usage-base", "%" PRIu64, u->cpu_usage_base); |
fe700f46 | 3415 | if (u->cpu_usage_last != NSEC_INFINITY) |
d68c645b | 3416 | (void) serialize_item_format(f, "cpu-usage-last", "%" PRIu64, u->cpu_usage_last); |
c2756a68 | 3417 | |
afcfaa69 LP |
3418 | if (u->oom_kill_last > 0) |
3419 | (void) serialize_item_format(f, "oom-kill-last", "%" PRIu64, u->oom_kill_last); | |
3420 | ||
fbe14fc9 LP |
3421 | for (CGroupIOAccountingMetric im = 0; im < _CGROUP_IO_ACCOUNTING_METRIC_MAX; im++) { |
3422 | (void) serialize_item_format(f, io_accounting_metric_field_base[im], "%" PRIu64, u->io_accounting_base[im]); | |
3423 | ||
3424 | if (u->io_accounting_last[im] != UINT64_MAX) | |
3425 | (void) serialize_item_format(f, io_accounting_metric_field_last[im], "%" PRIu64, u->io_accounting_last[im]); | |
3426 | } | |
3427 | ||
c2756a68 | 3428 | if (u->cgroup_path) |
d68c645b LP |
3429 | (void) serialize_item(f, "cgroup", u->cgroup_path); |
3430 | ||
3431 | (void) serialize_bool(f, "cgroup-realized", u->cgroup_realized); | |
3432 | (void) serialize_cgroup_mask(f, "cgroup-realized-mask", u->cgroup_realized_mask); | |
3433 | (void) serialize_cgroup_mask(f, "cgroup-enabled-mask", u->cgroup_enabled_mask); | |
3434 | (void) serialize_cgroup_mask(f, "cgroup-invalidated-mask", u->cgroup_invalidated_mask); | |
c2756a68 | 3435 | |
00d9ef85 | 3436 | if (uid_is_valid(u->ref_uid)) |
d68c645b | 3437 | (void) serialize_item_format(f, "ref-uid", UID_FMT, u->ref_uid); |
00d9ef85 | 3438 | if (gid_is_valid(u->ref_gid)) |
d68c645b | 3439 | (void) serialize_item_format(f, "ref-gid", GID_FMT, u->ref_gid); |
00d9ef85 | 3440 | |
4b58153d | 3441 | if (!sd_id128_is_null(u->invocation_id)) |
d68c645b | 3442 | (void) serialize_item_format(f, "invocation-id", SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(u->invocation_id)); |
4b58153d | 3443 | |
05a98afd LP |
3444 | bus_track_serialize(u->bus_track, f, "ref"); |
3445 | ||
6b659ed8 LP |
3446 | for (m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
3447 | uint64_t v; | |
3448 | ||
3449 | r = unit_get_ip_accounting(u, m, &v); | |
3450 | if (r >= 0) | |
d68c645b | 3451 | (void) serialize_item_format(f, ip_accounting_metric_field[m], "%" PRIu64, v); |
6b659ed8 LP |
3452 | } |
3453 | ||
613b411c LP |
3454 | if (serialize_jobs) { |
3455 | if (u->job) { | |
d68c645b | 3456 | fputs("job\n", f); |
05a98afd | 3457 | job_serialize(u->job, f); |
613b411c LP |
3458 | } |
3459 | ||
3460 | if (u->nop_job) { | |
d68c645b | 3461 | fputs("job\n", f); |
05a98afd | 3462 | job_serialize(u->nop_job, f); |
613b411c LP |
3463 | } |
3464 | } | |
3465 | ||
a16e1123 LP |
3466 | /* End marker */ |
3467 | fputc('\n', f); | |
3468 | return 0; | |
3469 | } | |
3470 | ||
b17c9620 LP |
3471 | static int unit_deserialize_job(Unit *u, FILE *f) { |
3472 | _cleanup_(job_freep) Job *j = NULL; | |
3473 | int r; | |
3474 | ||
3475 | assert(u); | |
3476 | assert(f); | |
3477 | ||
3478 | j = job_new_raw(u); | |
3479 | if (!j) | |
3480 | return log_oom(); | |
3481 | ||
3482 | r = job_deserialize(j, f); | |
3483 | if (r < 0) | |
3484 | return r; | |
3485 | ||
3486 | r = job_install_deserialized(j); | |
3487 | if (r < 0) | |
3488 | return r; | |
3489 | ||
3490 | TAKE_PTR(j); | |
3491 | return 0; | |
3492 | } | |
3493 | ||
a16e1123 LP |
3494 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
3495 | int r; | |
3496 | ||
3497 | assert(u); | |
3498 | assert(f); | |
3499 | assert(fds); | |
3500 | ||
a16e1123 | 3501 | for (;;) { |
8948b341 | 3502 | _cleanup_free_ char *line = NULL; |
8948b341 | 3503 | char *l, *v; |
83f18c91 | 3504 | ssize_t m; |
a16e1123 LP |
3505 | size_t k; |
3506 | ||
8948b341 LP |
3507 | r = read_line(f, LONG_LINE_MAX, &line); |
3508 | if (r < 0) | |
3509 | return log_error_errno(r, "Failed to read serialization line: %m"); | |
3510 | if (r == 0) /* eof */ | |
3511 | break; | |
a16e1123 LP |
3512 | |
3513 | l = strstrip(line); | |
8948b341 | 3514 | if (isempty(l)) /* End marker */ |
a483fb59 | 3515 | break; |
a16e1123 LP |
3516 | |
3517 | k = strcspn(l, "="); | |
3518 | ||
3519 | if (l[k] == '=') { | |
3520 | l[k] = 0; | |
3521 | v = l+k+1; | |
3522 | } else | |
3523 | v = l+k; | |
3524 | ||
cca098b0 | 3525 | if (streq(l, "job")) { |
39a18c60 | 3526 | if (v[0] == '\0') { |
b17c9620 LP |
3527 | /* New-style serialized job */ |
3528 | r = unit_deserialize_job(u, f); | |
3529 | if (r < 0) | |
e0209d83 | 3530 | return r; |
b17c9620 | 3531 | } else /* Legacy for pre-44 */ |
ed10fa8c | 3532 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); |
cca098b0 | 3533 | continue; |
a483fb59 | 3534 | } else if (streq(l, "state-change-timestamp")) { |
d68c645b | 3535 | (void) deserialize_dual_timestamp(v, &u->state_change_timestamp); |
a483fb59 | 3536 | continue; |
8aaf019b | 3537 | } else if (streq(l, "inactive-exit-timestamp")) { |
d68c645b | 3538 | (void) deserialize_dual_timestamp(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
3539 | continue; |
3540 | } else if (streq(l, "active-enter-timestamp")) { | |
d68c645b | 3541 | (void) deserialize_dual_timestamp(v, &u->active_enter_timestamp); |
8aaf019b LP |
3542 | continue; |
3543 | } else if (streq(l, "active-exit-timestamp")) { | |
d68c645b | 3544 | (void) deserialize_dual_timestamp(v, &u->active_exit_timestamp); |
8aaf019b LP |
3545 | continue; |
3546 | } else if (streq(l, "inactive-enter-timestamp")) { | |
d68c645b | 3547 | (void) deserialize_dual_timestamp(v, &u->inactive_enter_timestamp); |
8aaf019b | 3548 | continue; |
2791a8f8 | 3549 | } else if (streq(l, "condition-timestamp")) { |
d68c645b | 3550 | (void) deserialize_dual_timestamp(v, &u->condition_timestamp); |
2791a8f8 | 3551 | continue; |
59fccdc5 | 3552 | } else if (streq(l, "assert-timestamp")) { |
d68c645b | 3553 | (void) deserialize_dual_timestamp(v, &u->assert_timestamp); |
59fccdc5 | 3554 | continue; |
2791a8f8 | 3555 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 3556 | |
e911de99 LP |
3557 | r = parse_boolean(v); |
3558 | if (r < 0) | |
f2341e0a | 3559 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 3560 | else |
e911de99 | 3561 | u->condition_result = r; |
efbac6d2 LP |
3562 | |
3563 | continue; | |
c2756a68 | 3564 | |
59fccdc5 | 3565 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 3566 | |
e911de99 LP |
3567 | r = parse_boolean(v); |
3568 | if (r < 0) | |
f2341e0a | 3569 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 3570 | else |
e911de99 | 3571 | u->assert_result = r; |
59fccdc5 LP |
3572 | |
3573 | continue; | |
3574 | ||
c2756a68 | 3575 | } else if (streq(l, "transient")) { |
c2756a68 | 3576 | |
e911de99 LP |
3577 | r = parse_boolean(v); |
3578 | if (r < 0) | |
f2341e0a | 3579 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 3580 | else |
e911de99 | 3581 | u->transient = r; |
c2756a68 LP |
3582 | |
3583 | continue; | |
e911de99 | 3584 | |
0e699122 LP |
3585 | } else if (streq(l, "in-audit")) { |
3586 | ||
3587 | r = parse_boolean(v); | |
3588 | if (r < 0) | |
3589 | log_unit_debug(u, "Failed to parse in-audit bool %s, ignoring.", v); | |
3590 | else | |
3591 | u->in_audit = r; | |
3592 | ||
3593 | continue; | |
3594 | ||
d3070fbd LP |
3595 | } else if (streq(l, "exported-invocation-id")) { |
3596 | ||
3597 | r = parse_boolean(v); | |
3598 | if (r < 0) | |
3599 | log_unit_debug(u, "Failed to parse exported invocation ID bool %s, ignoring.", v); | |
3600 | else | |
3601 | u->exported_invocation_id = r; | |
3602 | ||
3603 | continue; | |
3604 | ||
3605 | } else if (streq(l, "exported-log-level-max")) { | |
3606 | ||
3607 | r = parse_boolean(v); | |
3608 | if (r < 0) | |
3609 | log_unit_debug(u, "Failed to parse exported log level max bool %s, ignoring.", v); | |
3610 | else | |
3611 | u->exported_log_level_max = r; | |
3612 | ||
3613 | continue; | |
3614 | ||
3615 | } else if (streq(l, "exported-log-extra-fields")) { | |
3616 | ||
3617 | r = parse_boolean(v); | |
3618 | if (r < 0) | |
3619 | log_unit_debug(u, "Failed to parse exported log extra fields bool %s, ignoring.", v); | |
3620 | else | |
3621 | u->exported_log_extra_fields = r; | |
3622 | ||
3623 | continue; | |
3624 | ||
90fc172e AZ |
3625 | } else if (streq(l, "exported-log-rate-limit-interval")) { |
3626 | ||
3627 | r = parse_boolean(v); | |
3628 | if (r < 0) | |
3629 | log_unit_debug(u, "Failed to parse exported log rate limit interval %s, ignoring.", v); | |
3630 | else | |
5ac1530e | 3631 | u->exported_log_ratelimit_interval = r; |
90fc172e AZ |
3632 | |
3633 | continue; | |
3634 | ||
3635 | } else if (streq(l, "exported-log-rate-limit-burst")) { | |
3636 | ||
3637 | r = parse_boolean(v); | |
3638 | if (r < 0) | |
3639 | log_unit_debug(u, "Failed to parse exported log rate limit burst %s, ignoring.", v); | |
3640 | else | |
5ac1530e | 3641 | u->exported_log_ratelimit_burst = r; |
90fc172e AZ |
3642 | |
3643 | continue; | |
3644 | ||
fe700f46 | 3645 | } else if (STR_IN_SET(l, "cpu-usage-base", "cpuacct-usage-base")) { |
5ad096b3 | 3646 | |
66ebf6c0 | 3647 | r = safe_atou64(v, &u->cpu_usage_base); |
5ad096b3 | 3648 | if (r < 0) |
fe700f46 LP |
3649 | log_unit_debug(u, "Failed to parse CPU usage base %s, ignoring.", v); |
3650 | ||
3651 | continue; | |
3652 | ||
3653 | } else if (streq(l, "cpu-usage-last")) { | |
3654 | ||
3655 | r = safe_atou64(v, &u->cpu_usage_last); | |
3656 | if (r < 0) | |
3657 | log_unit_debug(u, "Failed to read CPU usage last %s, ignoring.", v); | |
5ad096b3 | 3658 | |
0f908397 | 3659 | continue; |
4e595329 | 3660 | |
afcfaa69 LP |
3661 | } else if (streq(l, "oom-kill-last")) { |
3662 | ||
3663 | r = safe_atou64(v, &u->oom_kill_last); | |
3664 | if (r < 0) | |
3665 | log_unit_debug(u, "Failed to read OOM kill last %s, ignoring.", v); | |
3666 | ||
3667 | continue; | |
3668 | ||
e911de99 | 3669 | } else if (streq(l, "cgroup")) { |
72673e86 | 3670 | |
e911de99 LP |
3671 | r = unit_set_cgroup_path(u, v); |
3672 | if (r < 0) | |
f2341e0a | 3673 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 3674 | |
efdb0237 | 3675 | (void) unit_watch_cgroup(u); |
afcfaa69 | 3676 | (void) unit_watch_cgroup_memory(u); |
efdb0237 | 3677 | |
de1d4f9b WF |
3678 | continue; |
3679 | } else if (streq(l, "cgroup-realized")) { | |
3680 | int b; | |
3681 | ||
3682 | b = parse_boolean(v); | |
3683 | if (b < 0) | |
3684 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
3685 | else | |
3686 | u->cgroup_realized = b; | |
3687 | ||
c2756a68 | 3688 | continue; |
00d9ef85 | 3689 | |
8b108bd0 FB |
3690 | } else if (streq(l, "cgroup-realized-mask")) { |
3691 | ||
3692 | r = cg_mask_from_string(v, &u->cgroup_realized_mask); | |
3693 | if (r < 0) | |
3694 | log_unit_debug(u, "Failed to parse cgroup-realized-mask %s, ignoring.", v); | |
3695 | continue; | |
3696 | ||
3697 | } else if (streq(l, "cgroup-enabled-mask")) { | |
3698 | ||
3699 | r = cg_mask_from_string(v, &u->cgroup_enabled_mask); | |
3700 | if (r < 0) | |
3701 | log_unit_debug(u, "Failed to parse cgroup-enabled-mask %s, ignoring.", v); | |
3702 | continue; | |
3703 | ||
17f14955 | 3704 | } else if (streq(l, "cgroup-invalidated-mask")) { |
906c06f6 | 3705 | |
17f14955 | 3706 | r = cg_mask_from_string(v, &u->cgroup_invalidated_mask); |
906c06f6 | 3707 | if (r < 0) |
17f14955 | 3708 | log_unit_debug(u, "Failed to parse cgroup-invalidated-mask %s, ignoring.", v); |
906c06f6 DM |
3709 | continue; |
3710 | ||
00d9ef85 LP |
3711 | } else if (streq(l, "ref-uid")) { |
3712 | uid_t uid; | |
3713 | ||
3714 | r = parse_uid(v, &uid); | |
3715 | if (r < 0) | |
3716 | log_unit_debug(u, "Failed to parse referenced UID %s, ignoring.", v); | |
3717 | else | |
3718 | unit_ref_uid_gid(u, uid, GID_INVALID); | |
3719 | ||
3720 | continue; | |
3721 | ||
3722 | } else if (streq(l, "ref-gid")) { | |
3723 | gid_t gid; | |
3724 | ||
3725 | r = parse_gid(v, &gid); | |
3726 | if (r < 0) | |
3727 | log_unit_debug(u, "Failed to parse referenced GID %s, ignoring.", v); | |
3728 | else | |
3729 | unit_ref_uid_gid(u, UID_INVALID, gid); | |
3730 | ||
5f616d5f LP |
3731 | continue; |
3732 | ||
05a98afd LP |
3733 | } else if (streq(l, "ref")) { |
3734 | ||
3735 | r = strv_extend(&u->deserialized_refs, v); | |
3736 | if (r < 0) | |
d68c645b | 3737 | return log_oom(); |
05a98afd | 3738 | |
4b58153d LP |
3739 | continue; |
3740 | } else if (streq(l, "invocation-id")) { | |
3741 | sd_id128_t id; | |
3742 | ||
3743 | r = sd_id128_from_string(v, &id); | |
3744 | if (r < 0) | |
3745 | log_unit_debug(u, "Failed to parse invocation id %s, ignoring.", v); | |
3746 | else { | |
3747 | r = unit_set_invocation_id(u, id); | |
3748 | if (r < 0) | |
3749 | log_unit_warning_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
3750 | } | |
3751 | ||
00d9ef85 | 3752 | continue; |
8aaf019b | 3753 | } |
cca098b0 | 3754 | |
6b659ed8 | 3755 | /* Check if this is an IP accounting metric serialization field */ |
83f18c91 LP |
3756 | m = string_table_lookup(ip_accounting_metric_field, ELEMENTSOF(ip_accounting_metric_field), l); |
3757 | if (m >= 0) { | |
6b659ed8 LP |
3758 | uint64_t c; |
3759 | ||
3760 | r = safe_atou64(v, &c); | |
3761 | if (r < 0) | |
3762 | log_unit_debug(u, "Failed to parse IP accounting value %s, ignoring.", v); | |
3763 | else | |
3764 | u->ip_accounting_extra[m] = c; | |
3765 | continue; | |
3766 | } | |
3767 | ||
fbe14fc9 LP |
3768 | m = string_table_lookup(io_accounting_metric_field_base, ELEMENTSOF(io_accounting_metric_field_base), l); |
3769 | if (m >= 0) { | |
3770 | uint64_t c; | |
3771 | ||
3772 | r = safe_atou64(v, &c); | |
3773 | if (r < 0) | |
3774 | log_unit_debug(u, "Failed to parse IO accounting base value %s, ignoring.", v); | |
3775 | else | |
3776 | u->io_accounting_base[m] = c; | |
3777 | continue; | |
3778 | } | |
3779 | ||
3780 | m = string_table_lookup(io_accounting_metric_field_last, ELEMENTSOF(io_accounting_metric_field_last), l); | |
3781 | if (m >= 0) { | |
3782 | uint64_t c; | |
3783 | ||
3784 | r = safe_atou64(v, &c); | |
3785 | if (r < 0) | |
3786 | log_unit_debug(u, "Failed to parse IO accounting last value %s, ignoring.", v); | |
3787 | else | |
3788 | u->io_accounting_last[m] = c; | |
3789 | continue; | |
3790 | } | |
3791 | ||
9bdb98c5 | 3792 | if (unit_can_serialize(u)) { |
e8a565cb YW |
3793 | r = exec_runtime_deserialize_compat(u, l, v, fds); |
3794 | if (r < 0) { | |
3795 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); | |
3796 | continue; | |
9bdb98c5 LP |
3797 | } |
3798 | ||
e8a565cb YW |
3799 | /* Returns positive if key was handled by the call */ |
3800 | if (r > 0) | |
3801 | continue; | |
3802 | ||
9bdb98c5 | 3803 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); |
613b411c | 3804 | if (r < 0) |
f2341e0a | 3805 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 3806 | } |
a16e1123 | 3807 | } |
a483fb59 LP |
3808 | |
3809 | /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is | |
3810 | * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from | |
1f133e0d | 3811 | * before 228 where the base for timeouts was not persistent across reboots. */ |
a483fb59 LP |
3812 | |
3813 | if (!dual_timestamp_is_set(&u->state_change_timestamp)) | |
3814 | dual_timestamp_get(&u->state_change_timestamp); | |
3815 | ||
58d83430 LP |
3816 | /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied |
3817 | * after we are done. For that we invalidate anything already realized, so that we can realize it again. */ | |
3818 | unit_invalidate_cgroup(u, _CGROUP_MASK_ALL); | |
3819 | unit_invalidate_cgroup_bpf(u); | |
3820 | ||
a483fb59 | 3821 | return 0; |
a16e1123 LP |
3822 | } |
3823 | ||
8948b341 LP |
3824 | int unit_deserialize_skip(FILE *f) { |
3825 | int r; | |
07429866 ZJS |
3826 | assert(f); |
3827 | ||
3828 | /* Skip serialized data for this unit. We don't know what it is. */ | |
3829 | ||
3830 | for (;;) { | |
8948b341 LP |
3831 | _cleanup_free_ char *line = NULL; |
3832 | char *l; | |
07429866 | 3833 | |
8948b341 LP |
3834 | r = read_line(f, LONG_LINE_MAX, &line); |
3835 | if (r < 0) | |
3836 | return log_error_errno(r, "Failed to read serialization line: %m"); | |
3837 | if (r == 0) | |
3838 | return 0; | |
07429866 | 3839 | |
07429866 ZJS |
3840 | l = strstrip(line); |
3841 | ||
3842 | /* End marker */ | |
3843 | if (isempty(l)) | |
8948b341 | 3844 | return 1; |
07429866 ZJS |
3845 | } |
3846 | } | |
3847 | ||
d336ba9f | 3848 | int unit_add_node_dependency(Unit *u, const char *what, UnitDependency dep, UnitDependencyMask mask) { |
6e2ef85b | 3849 | Unit *device; |
68eda4bd | 3850 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
3851 | int r; |
3852 | ||
3853 | assert(u); | |
3854 | ||
6e2ef85b | 3855 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3856 | if (isempty(what)) |
3857 | return 0; | |
6e2ef85b | 3858 | |
8407a5d0 | 3859 | if (!is_device_path(what)) |
6e2ef85b LP |
3860 | return 0; |
3861 | ||
47bc12e1 LP |
3862 | /* When device units aren't supported (such as in a |
3863 | * container), don't create dependencies on them. */ | |
1c2e9646 | 3864 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3865 | return 0; |
3866 | ||
7410616c LP |
3867 | r = unit_name_from_path(what, ".device", &e); |
3868 | if (r < 0) | |
3869 | return r; | |
6e2ef85b | 3870 | |
ac155bb8 | 3871 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3872 | if (r < 0) |
3873 | return r; | |
3874 | ||
ebc8968b FB |
3875 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3876 | dep = UNIT_BINDS_TO; | |
3877 | ||
d336ba9f FB |
3878 | return unit_add_two_dependencies(u, UNIT_AFTER, |
3879 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, | |
3880 | device, true, mask); | |
6e2ef85b | 3881 | } |
a16e1123 | 3882 | |
be847e82 | 3883 | int unit_coldplug(Unit *u) { |
05a98afd LP |
3884 | int r = 0, q; |
3885 | char **i; | |
b49e14d5 | 3886 | Job *uj; |
cca098b0 LP |
3887 | |
3888 | assert(u); | |
3889 | ||
f0831ed2 | 3890 | /* Make sure we don't enter a loop, when coldplugging recursively. */ |
f78f265f LP |
3891 | if (u->coldplugged) |
3892 | return 0; | |
3893 | ||
3894 | u->coldplugged = true; | |
3895 | ||
05a98afd LP |
3896 | STRV_FOREACH(i, u->deserialized_refs) { |
3897 | q = bus_unit_track_add_name(u, *i); | |
3898 | if (q < 0 && r >= 0) | |
3899 | r = q; | |
3900 | } | |
3901 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 3902 | |
05a98afd LP |
3903 | if (UNIT_VTABLE(u)->coldplug) { |
3904 | q = UNIT_VTABLE(u)->coldplug(u); | |
3905 | if (q < 0 && r >= 0) | |
3906 | r = q; | |
3907 | } | |
5a6158b6 | 3908 | |
b49e14d5 | 3909 | uj = u->job ?: u->nop_job; |
3910 | if (uj) { | |
3911 | q = job_coldplug(uj); | |
05a98afd LP |
3912 | if (q < 0 && r >= 0) |
3913 | r = q; | |
3914 | } | |
cca098b0 | 3915 | |
05a98afd | 3916 | return r; |
cca098b0 LP |
3917 | } |
3918 | ||
f0831ed2 LP |
3919 | void unit_catchup(Unit *u) { |
3920 | assert(u); | |
3921 | ||
3922 | if (UNIT_VTABLE(u)->catchup) | |
3923 | UNIT_VTABLE(u)->catchup(u); | |
3924 | } | |
3925 | ||
ba25d39e | 3926 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3927 | struct stat st; |
3928 | ||
3929 | if (!path) | |
3930 | return false; | |
3931 | ||
77969722 LP |
3932 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3933 | * are never out-of-date. */ | |
3934 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3935 | return false; | |
3936 | ||
21b95806 ZJS |
3937 | if (stat(path, &st) < 0) |
3938 | /* What, cannot access this anymore? */ | |
3939 | return true; | |
3940 | ||
ba25d39e ZJS |
3941 | if (path_masked) |
3942 | /* For masked files check if they are still so */ | |
3943 | return !null_or_empty(&st); | |
3944 | else | |
3a8db9fe | 3945 | /* For non-empty files check the mtime */ |
87ec20ef | 3946 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3947 | |
3948 | return false; | |
3949 | } | |
3950 | ||
45fb0699 | 3951 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
3952 | _cleanup_strv_free_ char **t = NULL; |
3953 | char **path; | |
1b64d026 | 3954 | |
45fb0699 LP |
3955 | assert(u); |
3956 | ||
ba25d39e ZJS |
3957 | /* For unit files, we allow masking… */ |
3958 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3959 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3960 | return true; |
5f4b19f4 | 3961 | |
ba25d39e ZJS |
3962 | /* Source paths should not be masked… */ |
3963 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3964 | return true; |
ae7a7182 | 3965 | |
19a44dfe LR |
3966 | if (u->load_state == UNIT_LOADED) |
3967 | (void) unit_find_dropin_paths(u, &t); | |
ab932a62 LP |
3968 | if (!strv_equal(u->dropin_paths, t)) |
3969 | return true; | |
6d10d308 | 3970 | |
ba25d39e | 3971 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3972 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3973 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3974 | return true; |
21b95806 | 3975 | |
ab932a62 | 3976 | return false; |
45fb0699 LP |
3977 | } |
3978 | ||
fdf20a31 | 3979 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3980 | assert(u); |
3981 | ||
fdf20a31 MM |
3982 | if (UNIT_VTABLE(u)->reset_failed) |
3983 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 | 3984 | |
7bf081a1 | 3985 | ratelimit_reset(&u->start_ratelimit); |
6bf0f408 | 3986 | u->start_limit_hit = false; |
5632e374 LP |
3987 | } |
3988 | ||
a7f241db LP |
3989 | Unit *unit_following(Unit *u) { |
3990 | assert(u); | |
3991 | ||
3992 | if (UNIT_VTABLE(u)->following) | |
3993 | return UNIT_VTABLE(u)->following(u); | |
3994 | ||
3995 | return NULL; | |
3996 | } | |
3997 | ||
31afa0a4 | 3998 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3999 | assert(u); |
4000 | ||
31afa0a4 LP |
4001 | /* This call does check the current state of the unit. It's |
4002 | * hence useful to be called from state change calls of the | |
4003 | * unit itself, where the state isn't updated yet. This is | |
4004 | * different from unit_inactive_or_pending() which checks both | |
4005 | * the current state and for a queued job. */ | |
18ffdfda | 4006 | |
28a2dfe8 | 4007 | return unit_has_job_type(u, JOB_STOP); |
31afa0a4 LP |
4008 | } |
4009 | ||
4010 | bool unit_inactive_or_pending(Unit *u) { | |
4011 | assert(u); | |
4012 | ||
4013 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 4014 | |
d956ac29 LP |
4015 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
4016 | return true; | |
4017 | ||
31afa0a4 | 4018 | if (unit_stop_pending(u)) |
18ffdfda LP |
4019 | return true; |
4020 | ||
4021 | return false; | |
4022 | } | |
4023 | ||
31afa0a4 | 4024 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
4025 | assert(u); |
4026 | ||
f60c2665 | 4027 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
4028 | |
4029 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
4030 | return true; | |
4031 | ||
ac155bb8 | 4032 | if (u->job && |
3742095b | 4033 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
4034 | return true; |
4035 | ||
4036 | return false; | |
4037 | } | |
4038 | ||
52a12341 YW |
4039 | bool unit_will_restart_default(Unit *u) { |
4040 | assert(u); | |
4041 | ||
28a2dfe8 | 4042 | return unit_has_job_type(u, JOB_START); |
52a12341 YW |
4043 | } |
4044 | ||
deb4e708 MK |
4045 | bool unit_will_restart(Unit *u) { |
4046 | assert(u); | |
4047 | ||
4048 | if (!UNIT_VTABLE(u)->will_restart) | |
4049 | return false; | |
4050 | ||
4051 | return UNIT_VTABLE(u)->will_restart(u); | |
4052 | } | |
4053 | ||
718db961 | 4054 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
4055 | assert(u); |
4056 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 4057 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 4058 | |
8a0867d6 | 4059 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 4060 | return -EOPNOTSUPP; |
8a0867d6 | 4061 | |
c74f17d9 | 4062 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
4063 | } |
4064 | ||
82659fd7 | 4065 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
af4fa99d | 4066 | _cleanup_set_free_ Set *pid_set = NULL; |
82659fd7 LP |
4067 | int r; |
4068 | ||
d5099efc | 4069 | pid_set = set_new(NULL); |
82659fd7 LP |
4070 | if (!pid_set) |
4071 | return NULL; | |
4072 | ||
4073 | /* Exclude the main/control pids from being killed via the cgroup */ | |
4074 | if (main_pid > 0) { | |
fea72cc0 | 4075 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 | 4076 | if (r < 0) |
95f14a3e | 4077 | return NULL; |
82659fd7 LP |
4078 | } |
4079 | ||
4080 | if (control_pid > 0) { | |
fea72cc0 | 4081 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 | 4082 | if (r < 0) |
95f14a3e | 4083 | return NULL; |
82659fd7 LP |
4084 | } |
4085 | ||
95f14a3e | 4086 | return TAKE_PTR(pid_set); |
82659fd7 LP |
4087 | } |
4088 | ||
d91c34f2 LP |
4089 | int unit_kill_common( |
4090 | Unit *u, | |
4091 | KillWho who, | |
4092 | int signo, | |
4093 | pid_t main_pid, | |
4094 | pid_t control_pid, | |
718db961 | 4095 | sd_bus_error *error) { |
d91c34f2 | 4096 | |
814cc562 | 4097 | int r = 0; |
ac5e3a50 | 4098 | bool killed = false; |
814cc562 | 4099 | |
ac5e3a50 | 4100 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 4101 | if (main_pid < 0) |
7358dc02 | 4102 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 4103 | else if (main_pid == 0) |
7358dc02 | 4104 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
4105 | } |
4106 | ||
ac5e3a50 | 4107 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 4108 | if (control_pid < 0) |
7358dc02 | 4109 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 4110 | else if (control_pid == 0) |
7358dc02 | 4111 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
4112 | } |
4113 | ||
ac5e3a50 JS |
4114 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
4115 | if (control_pid > 0) { | |
814cc562 MS |
4116 | if (kill(control_pid, signo) < 0) |
4117 | r = -errno; | |
ac5e3a50 JS |
4118 | else |
4119 | killed = true; | |
4120 | } | |
814cc562 | 4121 | |
ac5e3a50 JS |
4122 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
4123 | if (main_pid > 0) { | |
814cc562 MS |
4124 | if (kill(main_pid, signo) < 0) |
4125 | r = -errno; | |
ac5e3a50 JS |
4126 | else |
4127 | killed = true; | |
4128 | } | |
814cc562 | 4129 | |
ac5e3a50 | 4130 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
4131 | _cleanup_set_free_ Set *pid_set = NULL; |
4132 | int q; | |
4133 | ||
82659fd7 LP |
4134 | /* Exclude the main/control pids from being killed via the cgroup */ |
4135 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
4136 | if (!pid_set) |
4137 | return -ENOMEM; | |
4138 | ||
1d98fef1 | 4139 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, NULL, NULL); |
4c701096 | 4140 | if (q < 0 && !IN_SET(q, -EAGAIN, -ESRCH, -ENOENT)) |
814cc562 | 4141 | r = q; |
ac5e3a50 JS |
4142 | else |
4143 | killed = true; | |
814cc562 MS |
4144 | } |
4145 | ||
201f0c91 | 4146 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL)) |
ac5e3a50 JS |
4147 | return -ESRCH; |
4148 | ||
814cc562 MS |
4149 | return r; |
4150 | } | |
4151 | ||
6210e7fc LP |
4152 | int unit_following_set(Unit *u, Set **s) { |
4153 | assert(u); | |
4154 | assert(s); | |
4155 | ||
4156 | if (UNIT_VTABLE(u)->following_set) | |
4157 | return UNIT_VTABLE(u)->following_set(u, s); | |
4158 | ||
4159 | *s = NULL; | |
4160 | return 0; | |
4161 | } | |
4162 | ||
a4375746 | 4163 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
4164 | int r; |
4165 | ||
a4375746 LP |
4166 | assert(u); |
4167 | ||
0ec0deaa LP |
4168 | if (u->unit_file_state < 0 && u->fragment_path) { |
4169 | r = unit_file_get_state( | |
463d0d15 | 4170 | u->manager->unit_file_scope, |
0ec0deaa | 4171 | NULL, |
9ea3a0e7 | 4172 | u->id, |
0ec0deaa LP |
4173 | &u->unit_file_state); |
4174 | if (r < 0) | |
4175 | u->unit_file_state = UNIT_FILE_BAD; | |
4176 | } | |
a4375746 | 4177 | |
ac155bb8 | 4178 | return u->unit_file_state; |
a4375746 LP |
4179 | } |
4180 | ||
d2dc52db LP |
4181 | int unit_get_unit_file_preset(Unit *u) { |
4182 | assert(u); | |
4183 | ||
4184 | if (u->unit_file_preset < 0 && u->fragment_path) | |
4185 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 4186 | u->manager->unit_file_scope, |
0ec0deaa LP |
4187 | NULL, |
4188 | basename(u->fragment_path)); | |
d2dc52db LP |
4189 | |
4190 | return u->unit_file_preset; | |
4191 | } | |
4192 | ||
7f7d01ed | 4193 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 4194 | assert(ref); |
7f7d01ed ZJS |
4195 | assert(source); |
4196 | assert(target); | |
57020a3a | 4197 | |
7f7d01ed | 4198 | if (ref->target) |
57020a3a LP |
4199 | unit_ref_unset(ref); |
4200 | ||
7f7d01ed ZJS |
4201 | ref->source = source; |
4202 | ref->target = target; | |
4203 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
4204 | return target; | |
57020a3a LP |
4205 | } |
4206 | ||
4207 | void unit_ref_unset(UnitRef *ref) { | |
4208 | assert(ref); | |
4209 | ||
7f7d01ed | 4210 | if (!ref->target) |
57020a3a LP |
4211 | return; |
4212 | ||
b75102e5 LP |
4213 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
4214 | * be unreferenced now. */ | |
7f7d01ed | 4215 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 4216 | |
7f7d01ed ZJS |
4217 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
4218 | ref->source = ref->target = NULL; | |
57020a3a LP |
4219 | } |
4220 | ||
29206d46 LP |
4221 | static int user_from_unit_name(Unit *u, char **ret) { |
4222 | ||
4223 | static const uint8_t hash_key[] = { | |
4224 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
4225 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
4226 | }; | |
4227 | ||
4228 | _cleanup_free_ char *n = NULL; | |
4229 | int r; | |
4230 | ||
4231 | r = unit_name_to_prefix(u->id, &n); | |
4232 | if (r < 0) | |
4233 | return r; | |
4234 | ||
4235 | if (valid_user_group_name(n)) { | |
ae2a15bc | 4236 | *ret = TAKE_PTR(n); |
29206d46 LP |
4237 | return 0; |
4238 | } | |
4239 | ||
4240 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
4241 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
4242 | return -ENOMEM; | |
4243 | ||
4244 | return 0; | |
4245 | } | |
4246 | ||
598459ce LP |
4247 | int unit_patch_contexts(Unit *u) { |
4248 | CGroupContext *cc; | |
4249 | ExecContext *ec; | |
cba6e062 LP |
4250 | unsigned i; |
4251 | int r; | |
4252 | ||
e06c73cc | 4253 | assert(u); |
e06c73cc | 4254 | |
598459ce LP |
4255 | /* Patch in the manager defaults into the exec and cgroup |
4256 | * contexts, _after_ the rest of the settings have been | |
4257 | * initialized */ | |
085afe36 | 4258 | |
598459ce LP |
4259 | ec = unit_get_exec_context(u); |
4260 | if (ec) { | |
4261 | /* This only copies in the ones that need memory */ | |
4262 | for (i = 0; i < _RLIMIT_MAX; i++) | |
4263 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
4264 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
4265 | if (!ec->rlimit[i]) | |
4266 | return -ENOMEM; | |
4267 | } | |
4268 | ||
463d0d15 | 4269 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4270 | !ec->working_directory) { |
4271 | ||
4272 | r = get_home_dir(&ec->working_directory); | |
4273 | if (r < 0) | |
4274 | return r; | |
4c08c824 LP |
4275 | |
4276 | /* Allow user services to run, even if the | |
4277 | * home directory is missing */ | |
4278 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4279 | } |
4280 | ||
598459ce | 4281 | if (ec->private_devices) |
2cd0a735 | 4282 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4283 | |
4284 | if (ec->protect_kernel_modules) | |
4285 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 | 4286 | |
84703040 KK |
4287 | if (ec->protect_kernel_logs) |
4288 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYSLOG); | |
4289 | ||
fc64760d KK |
4290 | if (ec->protect_clock) |
4291 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_SYS_TIME) | (UINT64_C(1) << CAP_WAKE_ALARM)); | |
4292 | ||
29206d46 LP |
4293 | if (ec->dynamic_user) { |
4294 | if (!ec->user) { | |
4295 | r = user_from_unit_name(u, &ec->user); | |
4296 | if (r < 0) | |
4297 | return r; | |
4298 | } | |
4299 | ||
4300 | if (!ec->group) { | |
4301 | ec->group = strdup(ec->user); | |
4302 | if (!ec->group) | |
4303 | return -ENOMEM; | |
4304 | } | |
4305 | ||
bf65b7e0 LP |
4306 | /* If the dynamic user option is on, let's make sure that the unit can't leave its |
4307 | * UID/GID around in the file system or on IPC objects. Hence enforce a strict | |
4308 | * sandbox. */ | |
63bb64a0 | 4309 | |
29206d46 | 4310 | ec->private_tmp = true; |
00d9ef85 | 4311 | ec->remove_ipc = true; |
63bb64a0 LP |
4312 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4313 | if (ec->protect_home == PROTECT_HOME_NO) | |
4314 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
bf65b7e0 LP |
4315 | |
4316 | /* Make sure this service can neither benefit from SUID/SGID binaries nor create | |
4317 | * them. */ | |
4318 | ec->no_new_privileges = true; | |
4319 | ec->restrict_suid_sgid = true; | |
29206d46 | 4320 | } |
cba6e062 LP |
4321 | } |
4322 | ||
598459ce | 4323 | cc = unit_get_cgroup_context(u); |
fe65e88b | 4324 | if (cc && ec) { |
f513e420 | 4325 | |
fe65e88b | 4326 | if (ec->private_devices && |
084870f9 ZJS |
4327 | cc->device_policy == CGROUP_DEVICE_POLICY_AUTO) |
4328 | cc->device_policy = CGROUP_DEVICE_POLICY_CLOSED; | |
fe65e88b YW |
4329 | |
4330 | if (ec->root_image && | |
084870f9 | 4331 | (cc->device_policy != CGROUP_DEVICE_POLICY_AUTO || cc->device_allow)) { |
fe65e88b YW |
4332 | |
4333 | /* When RootImage= is specified, the following devices are touched. */ | |
4334 | r = cgroup_add_device_allow(cc, "/dev/loop-control", "rw"); | |
4335 | if (r < 0) | |
4336 | return r; | |
4337 | ||
4338 | r = cgroup_add_device_allow(cc, "block-loop", "rwm"); | |
4339 | if (r < 0) | |
4340 | return r; | |
4341 | ||
4342 | r = cgroup_add_device_allow(cc, "block-blkext", "rwm"); | |
4343 | if (r < 0) | |
4344 | return r; | |
867af728 LP |
4345 | |
4346 | /* Make sure "block-loop" can be resolved, i.e. make sure "loop" shows up in /proc/devices */ | |
4347 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "modprobe@loop.service", true, UNIT_DEPENDENCY_FILE); | |
4348 | if (r < 0) | |
4349 | return r; | |
fe65e88b | 4350 | } |
fc64760d KK |
4351 | |
4352 | if (ec->protect_clock) { | |
4353 | r = cgroup_add_device_allow(cc, "char-rtc", "r"); | |
4354 | if (r < 0) | |
4355 | return r; | |
4356 | } | |
598459ce | 4357 | } |
f1660f96 | 4358 | |
cba6e062 | 4359 | return 0; |
e06c73cc LP |
4360 | } |
4361 | ||
3ef63c31 LP |
4362 | ExecContext *unit_get_exec_context(Unit *u) { |
4363 | size_t offset; | |
4364 | assert(u); | |
4365 | ||
598459ce LP |
4366 | if (u->type < 0) |
4367 | return NULL; | |
4368 | ||
3ef63c31 LP |
4369 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4370 | if (offset <= 0) | |
4371 | return NULL; | |
4372 | ||
4373 | return (ExecContext*) ((uint8_t*) u + offset); | |
4374 | } | |
4375 | ||
718db961 LP |
4376 | KillContext *unit_get_kill_context(Unit *u) { |
4377 | size_t offset; | |
4378 | assert(u); | |
4379 | ||
598459ce LP |
4380 | if (u->type < 0) |
4381 | return NULL; | |
4382 | ||
718db961 LP |
4383 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4384 | if (offset <= 0) | |
4385 | return NULL; | |
4386 | ||
4387 | return (KillContext*) ((uint8_t*) u + offset); | |
4388 | } | |
4389 | ||
4ad49000 LP |
4390 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4391 | size_t offset; | |
4392 | ||
598459ce LP |
4393 | if (u->type < 0) |
4394 | return NULL; | |
4395 | ||
4ad49000 LP |
4396 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4397 | if (offset <= 0) | |
4398 | return NULL; | |
4399 | ||
4400 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4401 | } | |
4402 | ||
613b411c LP |
4403 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4404 | size_t offset; | |
4405 | ||
598459ce LP |
4406 | if (u->type < 0) |
4407 | return NULL; | |
4408 | ||
613b411c LP |
4409 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4410 | if (offset <= 0) | |
4411 | return NULL; | |
4412 | ||
4413 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4414 | } | |
4415 | ||
2e59b241 | 4416 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4417 | assert(u); |
4418 | ||
2e59b241 | 4419 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4420 | return NULL; |
4421 | ||
39591351 LP |
4422 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4423 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4424 | |
2e59b241 | 4425 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4426 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4427 | |
2e59b241 LP |
4428 | if (flags & UNIT_RUNTIME) |
4429 | return u->manager->lookup_paths.runtime_control; | |
4430 | ||
39591351 | 4431 | return NULL; |
71645aca LP |
4432 | } |
4433 | ||
2e59b241 LP |
4434 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4435 | char *ret = NULL; | |
4436 | ||
4437 | if (!s) | |
4438 | return NULL; | |
4439 | ||
4440 | /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated | |
4441 | * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is | |
4442 | * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly | |
4443 | * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is | |
4444 | * not specified, then the return value always needs to be freed. Callers can use this to optimize memory | |
4445 | * allocations. */ | |
4446 | ||
4447 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
4448 | ret = specifier_escape(s); | |
4449 | if (!ret) | |
4450 | return NULL; | |
4451 | ||
4452 | s = ret; | |
4453 | } | |
4454 | ||
4455 | if (flags & UNIT_ESCAPE_C) { | |
4456 | char *a; | |
4457 | ||
4458 | a = cescape(s); | |
4459 | free(ret); | |
4460 | if (!a) | |
4461 | return NULL; | |
4462 | ||
4463 | ret = a; | |
4464 | } | |
4465 | ||
4466 | if (buf) { | |
4467 | *buf = ret; | |
4468 | return ret ?: (char*) s; | |
4469 | } | |
4470 | ||
4471 | return ret ?: strdup(s); | |
4472 | } | |
4473 | ||
4474 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4475 | _cleanup_free_ char *result = NULL; | |
4476 | size_t n = 0, allocated = 0; | |
ae2a15bc | 4477 | char **i; |
2e59b241 LP |
4478 | |
4479 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a | |
4480 | * way suitable for ExecStart= stanzas */ | |
4481 | ||
4482 | STRV_FOREACH(i, l) { | |
4483 | _cleanup_free_ char *buf = NULL; | |
4484 | const char *p; | |
4485 | size_t a; | |
4486 | char *q; | |
4487 | ||
4488 | p = unit_escape_setting(*i, flags, &buf); | |
4489 | if (!p) | |
4490 | return NULL; | |
4491 | ||
4492 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
4493 | if (!GREEDY_REALLOC(result, allocated, n + a + 1)) | |
4494 | return NULL; | |
4495 | ||
4496 | q = result + n; | |
4497 | if (n > 0) | |
4498 | *(q++) = ' '; | |
4499 | ||
4500 | *(q++) = '"'; | |
4501 | q = stpcpy(q, p); | |
4502 | *(q++) = '"'; | |
4503 | ||
4504 | n += a; | |
4505 | } | |
4506 | ||
4507 | if (!GREEDY_REALLOC(result, allocated, n + 1)) | |
4508 | return NULL; | |
4509 | ||
4510 | result[n] = 0; | |
4511 | ||
ae2a15bc | 4512 | return TAKE_PTR(result); |
2e59b241 LP |
4513 | } |
4514 | ||
4515 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4516 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4517 | const char *dir, *wrapped; |
26d04f86 | 4518 | int r; |
71645aca LP |
4519 | |
4520 | assert(u); | |
2e59b241 LP |
4521 | assert(name); |
4522 | assert(data); | |
4523 | ||
4524 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4525 | return 0; | |
4526 | ||
4527 | data = unit_escape_setting(data, flags, &escaped); | |
4528 | if (!data) | |
4529 | return -ENOMEM; | |
4530 | ||
4531 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4532 | * previous section header is the same */ | |
4533 | ||
4534 | if (flags & UNIT_PRIVATE) { | |
4535 | if (!UNIT_VTABLE(u)->private_section) | |
4536 | return -EINVAL; | |
4537 | ||
4538 | if (!u->transient_file || u->last_section_private < 0) | |
4539 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4540 | else if (u->last_section_private == 0) | |
4541 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4542 | } else { | |
4543 | if (!u->transient_file || u->last_section_private < 0) | |
4544 | data = strjoina("[Unit]\n", data); | |
4545 | else if (u->last_section_private > 0) | |
4546 | data = strjoina("\n[Unit]\n", data); | |
4547 | } | |
71645aca | 4548 | |
4f4afc88 LP |
4549 | if (u->transient_file) { |
4550 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4551 | * write to the transient unit file. */ | |
4552 | fputs(data, u->transient_file); | |
4f4afc88 | 4553 | |
2e59b241 LP |
4554 | if (!endswith(data, "\n")) |
4555 | fputc('\n', u->transient_file); | |
4556 | ||
4557 | /* Remember which section we wrote this entry to */ | |
4558 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4559 | return 0; |
2e59b241 | 4560 | } |
8e2af478 | 4561 | |
2e59b241 | 4562 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4563 | if (!dir) |
4564 | return -EINVAL; | |
71645aca | 4565 | |
2a9a6f8a | 4566 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4567 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4568 | data, |
4569 | "\n"); | |
e20b2a86 | 4570 | |
815b09d3 | 4571 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4572 | if (r < 0) |
4573 | return r; | |
4574 | ||
45639f1b | 4575 | (void) mkdir_p_label(p, 0755); |
4dba44a5 ZJS |
4576 | |
4577 | /* Make sure the drop-in dir is registered in our path cache. This way we don't need to stupidly | |
4578 | * recreate the cache after every drop-in we write. */ | |
4579 | if (u->manager->unit_path_cache) { | |
4580 | r = set_put_strdup(u->manager->unit_path_cache, p); | |
4581 | if (r < 0) | |
4582 | return r; | |
4583 | } | |
4584 | ||
2a9a6f8a | 4585 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4586 | if (r < 0) |
4587 | return r; | |
4588 | ||
815b09d3 | 4589 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4590 | if (r < 0) |
4591 | return r; | |
815b09d3 | 4592 | q = NULL; |
adb76a70 | 4593 | |
adb76a70 WC |
4594 | strv_uniq(u->dropin_paths); |
4595 | ||
4596 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4597 | ||
4598 | return 0; | |
26d04f86 | 4599 | } |
71645aca | 4600 | |
2e59b241 | 4601 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4602 | _cleanup_free_ char *p = NULL; |
4603 | va_list ap; | |
4604 | int r; | |
4605 | ||
4606 | assert(u); | |
4607 | assert(name); | |
4608 | assert(format); | |
4609 | ||
2e59b241 | 4610 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4611 | return 0; |
4612 | ||
4613 | va_start(ap, format); | |
4614 | r = vasprintf(&p, format, ap); | |
4615 | va_end(ap); | |
4616 | ||
4617 | if (r < 0) | |
4618 | return -ENOMEM; | |
4619 | ||
2e59b241 | 4620 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4621 | } |
71645aca | 4622 | |
c2756a68 | 4623 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4624 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4625 | FILE *f; |
4f4afc88 | 4626 | |
c2756a68 LP |
4627 | assert(u); |
4628 | ||
3f5e8115 LP |
4629 | if (!UNIT_VTABLE(u)->can_transient) |
4630 | return -EOPNOTSUPP; | |
4631 | ||
45639f1b LP |
4632 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4633 | ||
657ee2d8 | 4634 | path = path_join(u->manager->lookup_paths.transient, u->id); |
4f4afc88 LP |
4635 | if (!path) |
4636 | return -ENOMEM; | |
4637 | ||
4638 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4639 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4640 | ||
78e334b5 | 4641 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 4642 | f = fopen(path, "we"); |
0126c8f3 | 4643 | if (!f) |
78e334b5 | 4644 | return -errno; |
4f4afc88 LP |
4645 | } |
4646 | ||
0126c8f3 | 4647 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4648 | u->transient_file = f; |
4649 | ||
0126c8f3 | 4650 | free_and_replace(u->fragment_path, path); |
7c65093a | 4651 | |
7c65093a LP |
4652 | u->source_path = mfree(u->source_path); |
4653 | u->dropin_paths = strv_free(u->dropin_paths); | |
4654 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4655 | ||
4f4afc88 LP |
4656 | u->load_state = UNIT_STUB; |
4657 | u->load_error = 0; | |
4658 | u->transient = true; | |
4659 | ||
7c65093a LP |
4660 | unit_add_to_dbus_queue(u); |
4661 | unit_add_to_gc_queue(u); | |
c2756a68 | 4662 | |
4f4afc88 LP |
4663 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4664 | u->transient_file); | |
4665 | ||
3f5e8115 | 4666 | return 0; |
c2756a68 LP |
4667 | } |
4668 | ||
c53d2d54 | 4669 | static int log_kill(pid_t pid, int sig, void *userdata) { |
1d98fef1 LP |
4670 | _cleanup_free_ char *comm = NULL; |
4671 | ||
4672 | (void) get_process_comm(pid, &comm); | |
4673 | ||
4674 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4675 | only, like for example systemd's own PAM stub process. */ | |
4676 | if (comm && comm[0] == '(') | |
c53d2d54 | 4677 | return 0; |
1d98fef1 LP |
4678 | |
4679 | log_unit_notice(userdata, | |
4680 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4681 | pid, | |
4682 | strna(comm), | |
4683 | signal_to_string(sig)); | |
c53d2d54 DB |
4684 | |
4685 | return 1; | |
1d98fef1 LP |
4686 | } |
4687 | ||
4ab1670f | 4688 | static int operation_to_signal(const KillContext *c, KillOperation k, bool *noteworthy) { |
1d98fef1 LP |
4689 | assert(c); |
4690 | ||
4691 | switch (k) { | |
4692 | ||
4693 | case KILL_TERMINATE: | |
4694 | case KILL_TERMINATE_AND_LOG: | |
4ab1670f | 4695 | *noteworthy = false; |
1d98fef1 LP |
4696 | return c->kill_signal; |
4697 | ||
a232ebcc | 4698 | case KILL_RESTART: |
4ab1670f | 4699 | *noteworthy = false; |
a232ebcc ZJS |
4700 | return restart_kill_signal(c); |
4701 | ||
1d98fef1 | 4702 | case KILL_KILL: |
4ab1670f | 4703 | *noteworthy = true; |
fbb48d4c | 4704 | return c->final_kill_signal; |
1d98fef1 | 4705 | |
c87700a1 | 4706 | case KILL_WATCHDOG: |
4ab1670f | 4707 | *noteworthy = true; |
c87700a1 | 4708 | return c->watchdog_signal; |
1d98fef1 LP |
4709 | |
4710 | default: | |
4711 | assert_not_reached("KillOperation unknown"); | |
4712 | } | |
4713 | } | |
4714 | ||
cd2086fe LP |
4715 | int unit_kill_context( |
4716 | Unit *u, | |
4717 | KillContext *c, | |
db2cb23b | 4718 | KillOperation k, |
cd2086fe LP |
4719 | pid_t main_pid, |
4720 | pid_t control_pid, | |
4721 | bool main_pid_alien) { | |
4722 | ||
1d98fef1 | 4723 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4724 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4725 | int sig, r; |
cd2086fe LP |
4726 | |
4727 | assert(u); | |
4728 | assert(c); | |
4729 | ||
59ec09a8 ZJS |
4730 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. |
4731 | * Returns > 0 if we killed something worth waiting for, 0 otherwise. */ | |
1d98fef1 | 4732 | |
cd2086fe LP |
4733 | if (c->kill_mode == KILL_NONE) |
4734 | return 0; | |
4735 | ||
4ab1670f ZJS |
4736 | bool noteworthy; |
4737 | sig = operation_to_signal(c, k, ¬eworthy); | |
4738 | if (noteworthy) | |
4739 | log_func = log_kill; | |
1d98fef1 LP |
4740 | |
4741 | send_sighup = | |
4742 | c->send_sighup && | |
4743 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4744 | sig != SIGHUP; | |
4745 | ||
cd2086fe | 4746 | if (main_pid > 0) { |
1d98fef1 LP |
4747 | if (log_func) |
4748 | log_func(main_pid, sig, u); | |
cd2086fe | 4749 | |
1d98fef1 | 4750 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4751 | if (r < 0 && r != -ESRCH) { |
4752 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4753 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 4754 | |
b821a397 | 4755 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 4756 | } else { |
bc6aed7b LP |
4757 | if (!main_pid_alien) |
4758 | wait_for_exit = true; | |
82659fd7 | 4759 | |
1d98fef1 | 4760 | if (r != -ESRCH && send_sighup) |
d0667321 | 4761 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 4762 | } |
cd2086fe LP |
4763 | } |
4764 | ||
4765 | if (control_pid > 0) { | |
1d98fef1 LP |
4766 | if (log_func) |
4767 | log_func(control_pid, sig, u); | |
cd2086fe | 4768 | |
1d98fef1 | 4769 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4770 | if (r < 0 && r != -ESRCH) { |
4771 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4772 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 4773 | |
b821a397 | 4774 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 4775 | } else { |
cd2086fe | 4776 | wait_for_exit = true; |
82659fd7 | 4777 | |
1d98fef1 | 4778 | if (r != -ESRCH && send_sighup) |
d0667321 | 4779 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 4780 | } |
cd2086fe LP |
4781 | } |
4782 | ||
b821a397 LP |
4783 | if (u->cgroup_path && |
4784 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4785 | _cleanup_set_free_ Set *pid_set = NULL; |
4786 | ||
82659fd7 LP |
4787 | /* Exclude the main/control pids from being killed via the cgroup */ |
4788 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4789 | if (!pid_set) |
4790 | return -ENOMEM; | |
4791 | ||
1d98fef1 LP |
4792 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4793 | sig, | |
4794 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4795 | pid_set, | |
4796 | log_func, u); | |
cd2086fe | 4797 | if (r < 0) { |
4c701096 | 4798 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
b821a397 LP |
4799 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
4800 | ||
82659fd7 | 4801 | } else if (r > 0) { |
bc6aed7b | 4802 | |
1d9cc876 LP |
4803 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4804 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
4805 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
4806 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
4807 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
4808 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 4809 | |
c22800e4 | 4810 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 4811 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 4812 | wait_for_exit = true; |
58ea275a | 4813 | |
1d98fef1 | 4814 | if (send_sighup) { |
82659fd7 LP |
4815 | set_free(pid_set); |
4816 | ||
4817 | pid_set = unit_pid_set(main_pid, control_pid); | |
4818 | if (!pid_set) | |
4819 | return -ENOMEM; | |
4820 | ||
1d98fef1 LP |
4821 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4822 | SIGHUP, | |
4823 | CGROUP_IGNORE_SELF, | |
4824 | pid_set, | |
4825 | NULL, NULL); | |
82659fd7 LP |
4826 | } |
4827 | } | |
cd2086fe LP |
4828 | } |
4829 | ||
4830 | return wait_for_exit; | |
4831 | } | |
4832 | ||
eef85c4a | 4833 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
ca8700e9 | 4834 | _cleanup_free_ char *p = NULL; |
eef85c4a | 4835 | UnitDependencyInfo di; |
a57f7e2c LP |
4836 | int r; |
4837 | ||
4838 | assert(u); | |
4839 | assert(path); | |
4840 | ||
eef85c4a LP |
4841 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in |
4842 | * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to | |
4843 | * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily | |
4844 | * determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4845 | |
70b64bd3 ZJS |
4846 | if (!path_is_absolute(path)) |
4847 | return -EINVAL; | |
4848 | ||
548f6937 | 4849 | r = hashmap_ensure_allocated(&u->requires_mounts_for, &path_hash_ops); |
eef85c4a LP |
4850 | if (r < 0) |
4851 | return r; | |
4852 | ||
a57f7e2c LP |
4853 | p = strdup(path); |
4854 | if (!p) | |
4855 | return -ENOMEM; | |
4856 | ||
106bf8e4 | 4857 | path = path_simplify(p, true); |
a57f7e2c | 4858 | |
ca8700e9 | 4859 | if (!path_is_normalized(path)) |
a57f7e2c | 4860 | return -EPERM; |
a57f7e2c | 4861 | |
ca8700e9 | 4862 | if (hashmap_contains(u->requires_mounts_for, path)) |
a57f7e2c | 4863 | return 0; |
a57f7e2c | 4864 | |
eef85c4a LP |
4865 | di = (UnitDependencyInfo) { |
4866 | .origin_mask = mask | |
4867 | }; | |
4868 | ||
ca8700e9 ZJS |
4869 | r = hashmap_put(u->requires_mounts_for, path, di.data); |
4870 | if (r < 0) | |
a57f7e2c | 4871 | return r; |
ca8700e9 | 4872 | p = NULL; |
a57f7e2c | 4873 | |
4cb06c59 | 4874 | char prefix[strlen(path) + 1]; |
ca8700e9 | 4875 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
a57f7e2c LP |
4876 | Set *x; |
4877 | ||
4878 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4879 | if (!x) { | |
ca8700e9 | 4880 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 4881 | |
548f6937 | 4882 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
742f41ad LP |
4883 | if (r < 0) |
4884 | return r; | |
a57f7e2c LP |
4885 | |
4886 | q = strdup(prefix); | |
4887 | if (!q) | |
4888 | return -ENOMEM; | |
4889 | ||
d5099efc | 4890 | x = set_new(NULL); |
ca8700e9 | 4891 | if (!x) |
a57f7e2c | 4892 | return -ENOMEM; |
a57f7e2c LP |
4893 | |
4894 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4895 | if (r < 0) { | |
a57f7e2c LP |
4896 | set_free(x); |
4897 | return r; | |
4898 | } | |
ca8700e9 | 4899 | q = NULL; |
a57f7e2c LP |
4900 | } |
4901 | ||
4902 | r = set_put(x, u); | |
4903 | if (r < 0) | |
4904 | return r; | |
4905 | } | |
4906 | ||
4907 | return 0; | |
4908 | } | |
4909 | ||
613b411c LP |
4910 | int unit_setup_exec_runtime(Unit *u) { |
4911 | ExecRuntime **rt; | |
4912 | size_t offset; | |
613b411c | 4913 | Unit *other; |
eef85c4a LP |
4914 | Iterator i; |
4915 | void *v; | |
e8a565cb | 4916 | int r; |
613b411c LP |
4917 | |
4918 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4919 | assert(offset > 0); | |
4920 | ||
06b643e7 | 4921 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
4922 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
4923 | if (*rt) | |
4924 | return 0; | |
4925 | ||
4926 | /* Try to get it from somebody else */ | |
eef85c4a | 4927 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { |
e8a565cb YW |
4928 | r = exec_runtime_acquire(u->manager, NULL, other->id, false, rt); |
4929 | if (r == 1) | |
4930 | return 1; | |
613b411c LP |
4931 | } |
4932 | ||
e8a565cb | 4933 | return exec_runtime_acquire(u->manager, unit_get_exec_context(u), u->id, true, rt); |
613b411c LP |
4934 | } |
4935 | ||
29206d46 LP |
4936 | int unit_setup_dynamic_creds(Unit *u) { |
4937 | ExecContext *ec; | |
4938 | DynamicCreds *dcreds; | |
4939 | size_t offset; | |
4940 | ||
4941 | assert(u); | |
4942 | ||
4943 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
4944 | assert(offset > 0); | |
4945 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
4946 | ||
4947 | ec = unit_get_exec_context(u); | |
4948 | assert(ec); | |
4949 | ||
4950 | if (!ec->dynamic_user) | |
4951 | return 0; | |
4952 | ||
4953 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
4954 | } | |
4955 | ||
1c2e9646 LP |
4956 | bool unit_type_supported(UnitType t) { |
4957 | if (_unlikely_(t < 0)) | |
4958 | return false; | |
4959 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
4960 | return false; | |
4961 | ||
4962 | if (!unit_vtable[t]->supported) | |
4963 | return true; | |
4964 | ||
4965 | return unit_vtable[t]->supported(); | |
4966 | } | |
4967 | ||
8b4305c7 LP |
4968 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
4969 | int r; | |
4970 | ||
4971 | assert(u); | |
4972 | assert(where); | |
4973 | ||
4974 | r = dir_is_empty(where); | |
3f602115 | 4975 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
4976 | return; |
4977 | if (r < 0) { | |
4978 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
4979 | return; | |
4980 | } | |
4981 | ||
4982 | log_struct(LOG_NOTICE, | |
2b044526 | 4983 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 4984 | LOG_UNIT_ID(u), |
f1c50bec | 4985 | LOG_UNIT_INVOCATION_ID(u), |
8b4305c7 | 4986 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), |
a1230ff9 | 4987 | "WHERE=%s", where); |
8b4305c7 LP |
4988 | } |
4989 | ||
25cd4964 | 4990 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
58d9d89b | 4991 | _cleanup_free_ char *canonical_where = NULL; |
8b4305c7 LP |
4992 | int r; |
4993 | ||
4994 | assert(u); | |
4995 | assert(where); | |
4996 | ||
a5648b80 | 4997 | r = chase_symlinks(where, NULL, CHASE_NONEXISTENT, &canonical_where, NULL); |
8b4305c7 | 4998 | if (r < 0) { |
25cd4964 | 4999 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
5000 | return 0; |
5001 | } | |
25cd4964 AJ |
5002 | |
5003 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
5004 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
5005 | return 0; |
5006 | ||
25cd4964 | 5007 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
8b4305c7 | 5008 | log_struct(LOG_ERR, |
2b044526 | 5009 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 | 5010 | LOG_UNIT_ID(u), |
f1c50bec | 5011 | LOG_UNIT_INVOCATION_ID(u), |
25cd4964 | 5012 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), |
a1230ff9 | 5013 | "WHERE=%s", where); |
8b4305c7 LP |
5014 | |
5015 | return -ELOOP; | |
5016 | } | |
0f13f3bd LP |
5017 | |
5018 | bool unit_is_pristine(Unit *u) { | |
5019 | assert(u); | |
5020 | ||
7c65093a | 5021 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
5022 | * in a number of different ways. Note that to cater for unit |
5023 | * types such as slice, we are generally fine with units that | |
e9e8cbc8 ZJS |
5024 | * are marked UNIT_LOADED even though nothing was actually |
5025 | * loaded, as those unit types don't require a file on disk. */ | |
0f13f3bd LP |
5026 | |
5027 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
5028 | u->fragment_path || | |
5029 | u->source_path || | |
5030 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
5031 | u->job || |
5032 | u->merged_into); | |
5033 | } | |
291d565a LP |
5034 | |
5035 | pid_t unit_control_pid(Unit *u) { | |
5036 | assert(u); | |
5037 | ||
5038 | if (UNIT_VTABLE(u)->control_pid) | |
5039 | return UNIT_VTABLE(u)->control_pid(u); | |
5040 | ||
5041 | return 0; | |
5042 | } | |
5043 | ||
5044 | pid_t unit_main_pid(Unit *u) { | |
5045 | assert(u); | |
5046 | ||
5047 | if (UNIT_VTABLE(u)->main_pid) | |
5048 | return UNIT_VTABLE(u)->main_pid(u); | |
5049 | ||
5050 | return 0; | |
5051 | } | |
00d9ef85 LP |
5052 | |
5053 | static void unit_unref_uid_internal( | |
5054 | Unit *u, | |
5055 | uid_t *ref_uid, | |
5056 | bool destroy_now, | |
5057 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
5058 | ||
5059 | assert(u); | |
5060 | assert(ref_uid); | |
5061 | assert(_manager_unref_uid); | |
5062 | ||
5063 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
5064 | * gid_t are actually the same time, with the same validity rules. | |
5065 | * | |
5066 | * Drops a reference to UID/GID from a unit. */ | |
5067 | ||
5068 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
5069 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
5070 | ||
5071 | if (!uid_is_valid(*ref_uid)) | |
5072 | return; | |
5073 | ||
5074 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
5075 | *ref_uid = UID_INVALID; | |
5076 | } | |
5077 | ||
b90cf102 | 5078 | static void unit_unref_uid(Unit *u, bool destroy_now) { |
00d9ef85 LP |
5079 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); |
5080 | } | |
5081 | ||
b90cf102 | 5082 | static void unit_unref_gid(Unit *u, bool destroy_now) { |
00d9ef85 LP |
5083 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); |
5084 | } | |
5085 | ||
b90cf102 LP |
5086 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { |
5087 | assert(u); | |
5088 | ||
5089 | unit_unref_uid(u, destroy_now); | |
5090 | unit_unref_gid(u, destroy_now); | |
5091 | } | |
5092 | ||
00d9ef85 LP |
5093 | static int unit_ref_uid_internal( |
5094 | Unit *u, | |
5095 | uid_t *ref_uid, | |
5096 | uid_t uid, | |
5097 | bool clean_ipc, | |
5098 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
5099 | ||
5100 | int r; | |
5101 | ||
5102 | assert(u); | |
5103 | assert(ref_uid); | |
5104 | assert(uid_is_valid(uid)); | |
5105 | assert(_manager_ref_uid); | |
5106 | ||
5107 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
5108 | * are actually the same type, and have the same validity rules. | |
5109 | * | |
5110 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
5111 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
5112 | * drops to zero. */ | |
5113 | ||
5114 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
5115 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
5116 | ||
5117 | if (*ref_uid == uid) | |
5118 | return 0; | |
5119 | ||
5120 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
5121 | return -EBUSY; | |
5122 | ||
5123 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
5124 | if (r < 0) | |
5125 | return r; | |
5126 | ||
5127 | *ref_uid = uid; | |
5128 | return 1; | |
5129 | } | |
5130 | ||
b90cf102 | 5131 | static int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { |
00d9ef85 LP |
5132 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); |
5133 | } | |
5134 | ||
b90cf102 | 5135 | static int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { |
00d9ef85 LP |
5136 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); |
5137 | } | |
5138 | ||
5139 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
5140 | int r = 0, q = 0; | |
5141 | ||
5142 | assert(u); | |
5143 | ||
5144 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
5145 | ||
5146 | if (uid_is_valid(uid)) { | |
5147 | r = unit_ref_uid(u, uid, clean_ipc); | |
5148 | if (r < 0) | |
5149 | return r; | |
5150 | } | |
5151 | ||
5152 | if (gid_is_valid(gid)) { | |
5153 | q = unit_ref_gid(u, gid, clean_ipc); | |
5154 | if (q < 0) { | |
5155 | if (r > 0) | |
5156 | unit_unref_uid(u, false); | |
5157 | ||
5158 | return q; | |
5159 | } | |
5160 | } | |
5161 | ||
5162 | return r > 0 || q > 0; | |
5163 | } | |
5164 | ||
5165 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
5166 | ExecContext *c; | |
5167 | int r; | |
5168 | ||
5169 | assert(u); | |
5170 | ||
5171 | c = unit_get_exec_context(u); | |
5172 | ||
5173 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
5174 | if (r < 0) | |
5175 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
5176 | ||
5177 | return r; | |
5178 | } | |
5179 | ||
00d9ef85 LP |
5180 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { |
5181 | int r; | |
5182 | ||
5183 | assert(u); | |
5184 | ||
5185 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
5186 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
5187 | * objects when no service references the UID/GID anymore. */ | |
5188 | ||
5189 | r = unit_ref_uid_gid(u, uid, gid); | |
5190 | if (r > 0) | |
37d0b962 | 5191 | unit_add_to_dbus_queue(u); |
00d9ef85 | 5192 | } |
4b58153d LP |
5193 | |
5194 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { | |
5195 | int r; | |
5196 | ||
5197 | assert(u); | |
5198 | ||
5199 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
5200 | ||
5201 | if (sd_id128_equal(u->invocation_id, id)) | |
5202 | return 0; | |
5203 | ||
5204 | if (!sd_id128_is_null(u->invocation_id)) | |
5205 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
5206 | ||
5207 | if (sd_id128_is_null(id)) { | |
5208 | r = 0; | |
5209 | goto reset; | |
5210 | } | |
5211 | ||
5212 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
5213 | if (r < 0) | |
5214 | goto reset; | |
5215 | ||
5216 | u->invocation_id = id; | |
5217 | sd_id128_to_string(id, u->invocation_id_string); | |
5218 | ||
5219 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
5220 | if (r < 0) | |
5221 | goto reset; | |
5222 | ||
5223 | return 0; | |
5224 | ||
5225 | reset: | |
5226 | u->invocation_id = SD_ID128_NULL; | |
5227 | u->invocation_id_string[0] = 0; | |
5228 | return r; | |
5229 | } | |
5230 | ||
5231 | int unit_acquire_invocation_id(Unit *u) { | |
5232 | sd_id128_t id; | |
5233 | int r; | |
5234 | ||
5235 | assert(u); | |
5236 | ||
5237 | r = sd_id128_randomize(&id); | |
5238 | if (r < 0) | |
5239 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
5240 | ||
5241 | r = unit_set_invocation_id(u, id); | |
5242 | if (r < 0) | |
5243 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
5244 | ||
af92c603 | 5245 | unit_add_to_dbus_queue(u); |
4b58153d LP |
5246 | return 0; |
5247 | } | |
f0d47797 | 5248 | |
1ad6e8b3 LP |
5249 | int unit_set_exec_params(Unit *u, ExecParameters *p) { |
5250 | int r; | |
5251 | ||
7960b0c7 LP |
5252 | assert(u); |
5253 | assert(p); | |
f0d47797 | 5254 | |
004c7f16 | 5255 | /* Copy parameters from manager */ |
1ad6e8b3 LP |
5256 | r = manager_get_effective_environment(u->manager, &p->environment); |
5257 | if (r < 0) | |
5258 | return r; | |
5259 | ||
004c7f16 LP |
5260 | p->confirm_spawn = manager_get_confirm_spawn(u->manager); |
5261 | p->cgroup_supported = u->manager->cgroup_supported; | |
5262 | p->prefix = u->manager->prefix; | |
5263 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
5264 | ||
5238e957 | 5265 | /* Copy parameters from unit */ |
7960b0c7 | 5266 | p->cgroup_path = u->cgroup_path; |
1d9cc876 | 5267 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
1ad6e8b3 LP |
5268 | |
5269 | return 0; | |
f0d47797 | 5270 | } |
a79279c7 | 5271 | |
4c253ed1 | 5272 | int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) { |
a79279c7 LP |
5273 | int r; |
5274 | ||
5275 | assert(u); | |
5276 | assert(ret); | |
5277 | ||
5278 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
5279 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
5280 | ||
5281 | (void) unit_realize_cgroup(u); | |
5282 | ||
4c253ed1 LP |
5283 | r = safe_fork(name, FORK_REOPEN_LOG, ret); |
5284 | if (r != 0) | |
5285 | return r; | |
a79279c7 | 5286 | |
4c253ed1 LP |
5287 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); |
5288 | (void) ignore_signals(SIGPIPE, -1); | |
a79279c7 | 5289 | |
4c253ed1 | 5290 | (void) prctl(PR_SET_PDEATHSIG, SIGTERM); |
a79279c7 | 5291 | |
4c253ed1 LP |
5292 | if (u->cgroup_path) { |
5293 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
5294 | if (r < 0) { | |
5295 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", u->cgroup_path); | |
5296 | _exit(EXIT_CGROUP); | |
a79279c7 | 5297 | } |
a79279c7 LP |
5298 | } |
5299 | ||
4c253ed1 | 5300 | return 0; |
a79279c7 | 5301 | } |
c999cf38 | 5302 | |
810ef318 YW |
5303 | int unit_fork_and_watch_rm_rf(Unit *u, char **paths, pid_t *ret_pid) { |
5304 | pid_t pid; | |
5305 | int r; | |
5306 | ||
5307 | assert(u); | |
5308 | assert(ret_pid); | |
5309 | ||
5310 | r = unit_fork_helper_process(u, "(sd-rmrf)", &pid); | |
5311 | if (r < 0) | |
5312 | return r; | |
5313 | if (r == 0) { | |
5314 | int ret = EXIT_SUCCESS; | |
5315 | char **i; | |
5316 | ||
5317 | STRV_FOREACH(i, paths) { | |
5318 | r = rm_rf(*i, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_MISSING_OK); | |
5319 | if (r < 0) { | |
5320 | log_error_errno(r, "Failed to remove '%s': %m", *i); | |
5321 | ret = EXIT_FAILURE; | |
5322 | } | |
5323 | } | |
5324 | ||
5325 | _exit(ret); | |
5326 | } | |
5327 | ||
5328 | r = unit_watch_pid(u, pid, true); | |
5329 | if (r < 0) | |
5330 | return r; | |
5331 | ||
5332 | *ret_pid = pid; | |
5333 | return 0; | |
5334 | } | |
5335 | ||
c999cf38 LP |
5336 | static void unit_update_dependency_mask(Unit *u, UnitDependency d, Unit *other, UnitDependencyInfo di) { |
5337 | assert(u); | |
5338 | assert(d >= 0); | |
5339 | assert(d < _UNIT_DEPENDENCY_MAX); | |
5340 | assert(other); | |
5341 | ||
5342 | if (di.origin_mask == 0 && di.destination_mask == 0) { | |
5343 | /* No bit set anymore, let's drop the whole entry */ | |
5344 | assert_se(hashmap_remove(u->dependencies[d], other)); | |
5345 | log_unit_debug(u, "%s lost dependency %s=%s", u->id, unit_dependency_to_string(d), other->id); | |
5346 | } else | |
5347 | /* Mask was reduced, let's update the entry */ | |
5348 | assert_se(hashmap_update(u->dependencies[d], other, di.data) == 0); | |
5349 | } | |
5350 | ||
5351 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
5352 | UnitDependency d; | |
5353 | ||
5354 | assert(u); | |
5355 | ||
5356 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5357 | ||
5358 | if (mask == 0) | |
5359 | return; | |
5360 | ||
5361 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
5362 | bool done; | |
5363 | ||
5364 | do { | |
5365 | UnitDependencyInfo di; | |
5366 | Unit *other; | |
5367 | Iterator i; | |
5368 | ||
5369 | done = true; | |
5370 | ||
5371 | HASHMAP_FOREACH_KEY(di.data, other, u->dependencies[d], i) { | |
5372 | UnitDependency q; | |
5373 | ||
5374 | if ((di.origin_mask & ~mask) == di.origin_mask) | |
5375 | continue; | |
5376 | di.origin_mask &= ~mask; | |
5377 | unit_update_dependency_mask(u, d, other, di); | |
5378 | ||
5379 | /* We updated the dependency from our unit to the other unit now. But most dependencies | |
5380 | * imply a reverse dependency. Hence, let's delete that one too. For that we go through | |
5381 | * all dependency types on the other unit and delete all those which point to us and | |
5382 | * have the right mask set. */ | |
5383 | ||
5384 | for (q = 0; q < _UNIT_DEPENDENCY_MAX; q++) { | |
5385 | UnitDependencyInfo dj; | |
5386 | ||
5387 | dj.data = hashmap_get(other->dependencies[q], u); | |
5388 | if ((dj.destination_mask & ~mask) == dj.destination_mask) | |
5389 | continue; | |
5390 | dj.destination_mask &= ~mask; | |
5391 | ||
5392 | unit_update_dependency_mask(other, q, u, dj); | |
5393 | } | |
5394 | ||
5395 | unit_add_to_gc_queue(other); | |
5396 | ||
5397 | done = false; | |
5398 | break; | |
5399 | } | |
5400 | ||
5401 | } while (!done); | |
5402 | } | |
5403 | } | |
d3070fbd | 5404 | |
2f8c48b6 AZ |
5405 | static int unit_get_invocation_path(Unit *u, char **ret) { |
5406 | char *p; | |
5407 | int r; | |
5408 | ||
5409 | assert(u); | |
5410 | assert(ret); | |
5411 | ||
5412 | if (MANAGER_IS_SYSTEM(u->manager)) | |
5413 | p = strjoin("/run/systemd/units/invocation:", u->id); | |
5414 | else { | |
5415 | _cleanup_free_ char *user_path = NULL; | |
5416 | r = xdg_user_runtime_dir(&user_path, "/systemd/units/invocation:"); | |
5417 | if (r < 0) | |
5418 | return r; | |
5419 | p = strjoin(user_path, u->id); | |
5420 | } | |
5421 | ||
5422 | if (!p) | |
5423 | return -ENOMEM; | |
5424 | ||
5425 | *ret = p; | |
5426 | return 0; | |
5427 | } | |
5428 | ||
d3070fbd | 5429 | static int unit_export_invocation_id(Unit *u) { |
2f8c48b6 | 5430 | _cleanup_free_ char *p = NULL; |
d3070fbd LP |
5431 | int r; |
5432 | ||
5433 | assert(u); | |
5434 | ||
5435 | if (u->exported_invocation_id) | |
5436 | return 0; | |
5437 | ||
5438 | if (sd_id128_is_null(u->invocation_id)) | |
5439 | return 0; | |
5440 | ||
2f8c48b6 AZ |
5441 | r = unit_get_invocation_path(u, &p); |
5442 | if (r < 0) | |
5443 | return log_unit_debug_errno(u, r, "Failed to get invocation path: %m"); | |
5444 | ||
d3070fbd LP |
5445 | r = symlink_atomic(u->invocation_id_string, p); |
5446 | if (r < 0) | |
5447 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5448 | ||
5449 | u->exported_invocation_id = true; | |
5450 | return 0; | |
5451 | } | |
5452 | ||
5453 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5454 | const char *p; | |
5455 | char buf[2]; | |
5456 | int r; | |
5457 | ||
5458 | assert(u); | |
5459 | assert(c); | |
5460 | ||
5461 | if (u->exported_log_level_max) | |
5462 | return 0; | |
5463 | ||
5464 | if (c->log_level_max < 0) | |
5465 | return 0; | |
5466 | ||
5467 | assert(c->log_level_max <= 7); | |
5468 | ||
5469 | buf[0] = '0' + c->log_level_max; | |
5470 | buf[1] = 0; | |
5471 | ||
5472 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5473 | r = symlink_atomic(buf, p); | |
5474 | if (r < 0) | |
5475 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5476 | ||
5477 | u->exported_log_level_max = true; | |
5478 | return 0; | |
5479 | } | |
5480 | ||
5481 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5482 | _cleanup_close_ int fd = -1; | |
5483 | struct iovec *iovec; | |
5484 | const char *p; | |
5485 | char *pattern; | |
5486 | le64_t *sizes; | |
5487 | ssize_t n; | |
5488 | size_t i; | |
5489 | int r; | |
5490 | ||
5491 | if (u->exported_log_extra_fields) | |
5492 | return 0; | |
5493 | ||
5494 | if (c->n_log_extra_fields <= 0) | |
5495 | return 0; | |
5496 | ||
5497 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5498 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5499 | ||
5500 | for (i = 0; i < c->n_log_extra_fields; i++) { | |
5501 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); | |
5502 | ||
5503 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5504 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5505 | } | |
5506 | ||
5507 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5508 | pattern = strjoina(p, ".XXXXXX"); | |
5509 | ||
5510 | fd = mkostemp_safe(pattern); | |
5511 | if (fd < 0) | |
5512 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5513 | ||
5514 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5515 | if (n < 0) { | |
5516 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5517 | goto fail; | |
5518 | } | |
5519 | ||
5520 | (void) fchmod(fd, 0644); | |
5521 | ||
5522 | if (rename(pattern, p) < 0) { | |
5523 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5524 | goto fail; | |
5525 | } | |
5526 | ||
5527 | u->exported_log_extra_fields = true; | |
5528 | return 0; | |
5529 | ||
5530 | fail: | |
5531 | (void) unlink(pattern); | |
5532 | return r; | |
5533 | } | |
5534 | ||
5ac1530e | 5535 | static int unit_export_log_ratelimit_interval(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5536 | _cleanup_free_ char *buf = NULL; |
5537 | const char *p; | |
5538 | int r; | |
5539 | ||
5540 | assert(u); | |
5541 | assert(c); | |
5542 | ||
5ac1530e | 5543 | if (u->exported_log_ratelimit_interval) |
90fc172e AZ |
5544 | return 0; |
5545 | ||
5ac1530e | 5546 | if (c->log_ratelimit_interval_usec == 0) |
90fc172e AZ |
5547 | return 0; |
5548 | ||
5549 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5550 | ||
5ac1530e | 5551 | if (asprintf(&buf, "%" PRIu64, c->log_ratelimit_interval_usec) < 0) |
90fc172e AZ |
5552 | return log_oom(); |
5553 | ||
5554 | r = symlink_atomic(buf, p); | |
5555 | if (r < 0) | |
5556 | return log_unit_debug_errno(u, r, "Failed to create log rate limit interval symlink %s: %m", p); | |
5557 | ||
5ac1530e | 5558 | u->exported_log_ratelimit_interval = true; |
90fc172e AZ |
5559 | return 0; |
5560 | } | |
5561 | ||
5ac1530e | 5562 | static int unit_export_log_ratelimit_burst(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5563 | _cleanup_free_ char *buf = NULL; |
5564 | const char *p; | |
5565 | int r; | |
5566 | ||
5567 | assert(u); | |
5568 | assert(c); | |
5569 | ||
5ac1530e | 5570 | if (u->exported_log_ratelimit_burst) |
90fc172e AZ |
5571 | return 0; |
5572 | ||
5ac1530e | 5573 | if (c->log_ratelimit_burst == 0) |
90fc172e AZ |
5574 | return 0; |
5575 | ||
5576 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5577 | ||
5ac1530e | 5578 | if (asprintf(&buf, "%u", c->log_ratelimit_burst) < 0) |
90fc172e AZ |
5579 | return log_oom(); |
5580 | ||
5581 | r = symlink_atomic(buf, p); | |
5582 | if (r < 0) | |
5583 | return log_unit_debug_errno(u, r, "Failed to create log rate limit burst symlink %s: %m", p); | |
5584 | ||
5ac1530e | 5585 | u->exported_log_ratelimit_burst = true; |
90fc172e AZ |
5586 | return 0; |
5587 | } | |
5588 | ||
d3070fbd LP |
5589 | void unit_export_state_files(Unit *u) { |
5590 | const ExecContext *c; | |
5591 | ||
5592 | assert(u); | |
5593 | ||
5594 | if (!u->id) | |
5595 | return; | |
5596 | ||
638cece4 | 5597 | if (MANAGER_IS_TEST_RUN(u->manager)) |
8f632531 LP |
5598 | return; |
5599 | ||
d3070fbd LP |
5600 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5601 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5602 | * the IPC system itself and PID 1 also log to the journal. | |
5603 | * | |
5604 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5605 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5606 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5607 | * namespace at least. | |
5608 | * | |
5609 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5610 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5611 | * them with one. */ | |
5612 | ||
5613 | (void) unit_export_invocation_id(u); | |
5614 | ||
2f8c48b6 AZ |
5615 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5616 | return; | |
5617 | ||
d3070fbd LP |
5618 | c = unit_get_exec_context(u); |
5619 | if (c) { | |
5620 | (void) unit_export_log_level_max(u, c); | |
5621 | (void) unit_export_log_extra_fields(u, c); | |
5ac1530e ZJS |
5622 | (void) unit_export_log_ratelimit_interval(u, c); |
5623 | (void) unit_export_log_ratelimit_burst(u, c); | |
d3070fbd LP |
5624 | } |
5625 | } | |
5626 | ||
5627 | void unit_unlink_state_files(Unit *u) { | |
5628 | const char *p; | |
5629 | ||
5630 | assert(u); | |
5631 | ||
5632 | if (!u->id) | |
5633 | return; | |
5634 | ||
d3070fbd LP |
5635 | /* Undoes the effect of unit_export_state() */ |
5636 | ||
5637 | if (u->exported_invocation_id) { | |
2f8c48b6 AZ |
5638 | _cleanup_free_ char *invocation_path = NULL; |
5639 | int r = unit_get_invocation_path(u, &invocation_path); | |
5640 | if (r >= 0) { | |
5641 | (void) unlink(invocation_path); | |
5642 | u->exported_invocation_id = false; | |
5643 | } | |
d3070fbd LP |
5644 | } |
5645 | ||
2f8c48b6 AZ |
5646 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5647 | return; | |
5648 | ||
d3070fbd LP |
5649 | if (u->exported_log_level_max) { |
5650 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5651 | (void) unlink(p); | |
5652 | ||
5653 | u->exported_log_level_max = false; | |
5654 | } | |
5655 | ||
5656 | if (u->exported_log_extra_fields) { | |
5657 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5658 | (void) unlink(p); | |
5659 | ||
5660 | u->exported_log_extra_fields = false; | |
5661 | } | |
90fc172e | 5662 | |
5ac1530e | 5663 | if (u->exported_log_ratelimit_interval) { |
90fc172e AZ |
5664 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); |
5665 | (void) unlink(p); | |
5666 | ||
5ac1530e | 5667 | u->exported_log_ratelimit_interval = false; |
90fc172e AZ |
5668 | } |
5669 | ||
5ac1530e | 5670 | if (u->exported_log_ratelimit_burst) { |
90fc172e AZ |
5671 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); |
5672 | (void) unlink(p); | |
5673 | ||
5ac1530e | 5674 | u->exported_log_ratelimit_burst = false; |
90fc172e | 5675 | } |
d3070fbd | 5676 | } |
5afe510c | 5677 | |
3c7416b6 LP |
5678 | int unit_prepare_exec(Unit *u) { |
5679 | int r; | |
5680 | ||
5681 | assert(u); | |
5682 | ||
fab34748 KL |
5683 | /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable. |
5684 | * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */ | |
5685 | r = bpf_firewall_load_custom(u); | |
5686 | if (r < 0) | |
5687 | return r; | |
5688 | ||
3c7416b6 LP |
5689 | /* Prepares everything so that we can fork of a process for this unit */ |
5690 | ||
5691 | (void) unit_realize_cgroup(u); | |
5692 | ||
5693 | if (u->reset_accounting) { | |
9b2559a1 | 5694 | (void) unit_reset_accounting(u); |
3c7416b6 LP |
5695 | u->reset_accounting = false; |
5696 | } | |
5697 | ||
5698 | unit_export_state_files(u); | |
5699 | ||
5700 | r = unit_setup_exec_runtime(u); | |
5701 | if (r < 0) | |
5702 | return r; | |
5703 | ||
5704 | r = unit_setup_dynamic_creds(u); | |
5705 | if (r < 0) | |
5706 | return r; | |
5707 | ||
5708 | return 0; | |
5709 | } | |
5710 | ||
c53d2d54 | 5711 | static int log_leftover(pid_t pid, int sig, void *userdata) { |
a4634b21 LP |
5712 | _cleanup_free_ char *comm = NULL; |
5713 | ||
5714 | (void) get_process_comm(pid, &comm); | |
5715 | ||
5716 | if (comm && comm[0] == '(') /* Most likely our own helper process (PAM?), ignore */ | |
c53d2d54 | 5717 | return 0; |
a4634b21 LP |
5718 | |
5719 | log_unit_warning(userdata, | |
5720 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5721 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5722 | pid, strna(comm)); | |
c53d2d54 DB |
5723 | |
5724 | return 1; | |
a4634b21 LP |
5725 | } |
5726 | ||
c53d2d54 | 5727 | int unit_warn_leftover_processes(Unit *u) { |
a4634b21 LP |
5728 | assert(u); |
5729 | ||
5730 | (void) unit_pick_cgroup_path(u); | |
5731 | ||
5732 | if (!u->cgroup_path) | |
c53d2d54 | 5733 | return 0; |
a4634b21 | 5734 | |
c53d2d54 | 5735 | return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_leftover, u); |
a4634b21 LP |
5736 | } |
5737 | ||
bb2c7685 LP |
5738 | bool unit_needs_console(Unit *u) { |
5739 | ExecContext *ec; | |
5740 | UnitActiveState state; | |
5741 | ||
5742 | assert(u); | |
5743 | ||
5744 | state = unit_active_state(u); | |
5745 | ||
5746 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5747 | return false; | |
5748 | ||
5749 | if (UNIT_VTABLE(u)->needs_console) | |
5750 | return UNIT_VTABLE(u)->needs_console(u); | |
5751 | ||
5752 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5753 | ec = unit_get_exec_context(u); | |
5754 | if (!ec) | |
5755 | return false; | |
5756 | ||
5757 | return exec_context_may_touch_console(ec); | |
5758 | } | |
5759 | ||
81e9871e LP |
5760 | const char *unit_label_path(Unit *u) { |
5761 | const char *p; | |
5762 | ||
5763 | /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off | |
5764 | * when validating access checks. */ | |
5765 | ||
5766 | p = u->source_path ?: u->fragment_path; | |
5767 | if (!p) | |
5768 | return NULL; | |
5769 | ||
5770 | /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */ | |
5771 | if (path_equal(p, "/dev/null")) | |
5772 | return NULL; | |
5773 | ||
5774 | return p; | |
5775 | } | |
5776 | ||
6592b975 LP |
5777 | int unit_pid_attachable(Unit *u, pid_t pid, sd_bus_error *error) { |
5778 | int r; | |
5779 | ||
5780 | assert(u); | |
5781 | ||
5782 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5783 | * and not a kernel thread either */ | |
5784 | ||
5785 | /* First, a simple range check */ | |
5786 | if (!pid_is_valid(pid)) | |
5787 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier " PID_FMT " is not valid.", pid); | |
5788 | ||
5789 | /* Some extra safety check */ | |
5790 | if (pid == 1 || pid == getpid_cached()) | |
3fe91079 | 5791 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager process, refusing.", pid); |
6592b975 LP |
5792 | |
5793 | /* Don't even begin to bother with kernel threads */ | |
5794 | r = is_kernel_thread(pid); | |
5795 | if (r == -ESRCH) | |
5796 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid); | |
5797 | if (r < 0) | |
5798 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid); | |
5799 | if (r > 0) | |
5800 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid); | |
5801 | ||
5802 | return 0; | |
5803 | } | |
5804 | ||
523ee2d4 LP |
5805 | void unit_log_success(Unit *u) { |
5806 | assert(u); | |
5807 | ||
5808 | log_struct(LOG_INFO, | |
5809 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR, | |
5810 | LOG_UNIT_ID(u), | |
5811 | LOG_UNIT_INVOCATION_ID(u), | |
5812 | LOG_UNIT_MESSAGE(u, "Succeeded.")); | |
5813 | } | |
5814 | ||
7c047d74 LP |
5815 | void unit_log_failure(Unit *u, const char *result) { |
5816 | assert(u); | |
5817 | assert(result); | |
5818 | ||
5819 | log_struct(LOG_WARNING, | |
5820 | "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR, | |
5821 | LOG_UNIT_ID(u), | |
5822 | LOG_UNIT_INVOCATION_ID(u), | |
5823 | LOG_UNIT_MESSAGE(u, "Failed with result '%s'.", result), | |
5824 | "UNIT_RESULT=%s", result); | |
5825 | } | |
5826 | ||
31cd5f63 AZ |
5827 | void unit_log_skip(Unit *u, const char *result) { |
5828 | assert(u); | |
5829 | assert(result); | |
5830 | ||
5831 | log_struct(LOG_INFO, | |
5832 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR, | |
5833 | LOG_UNIT_ID(u), | |
5834 | LOG_UNIT_INVOCATION_ID(u), | |
5835 | LOG_UNIT_MESSAGE(u, "Skipped due to '%s'.", result), | |
5836 | "UNIT_RESULT=%s", result); | |
5837 | } | |
5838 | ||
91bbd9b7 LP |
5839 | void unit_log_process_exit( |
5840 | Unit *u, | |
91bbd9b7 LP |
5841 | const char *kind, |
5842 | const char *command, | |
5cc2cd1c | 5843 | bool success, |
91bbd9b7 LP |
5844 | int code, |
5845 | int status) { | |
5846 | ||
5cc2cd1c ZJS |
5847 | int level; |
5848 | ||
91bbd9b7 LP |
5849 | assert(u); |
5850 | assert(kind); | |
5851 | ||
5cc2cd1c ZJS |
5852 | /* If this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure |
5853 | * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption | |
5854 | * that the service already logged the reason at a higher log level on its own. Otherwise, make it a | |
5855 | * WARNING. */ | |
5856 | if (success) | |
5857 | level = LOG_DEBUG; | |
5858 | else if (code == CLD_EXITED) | |
5859 | level = LOG_NOTICE; | |
5860 | else | |
91bbd9b7 LP |
5861 | level = LOG_WARNING; |
5862 | ||
5863 | log_struct(level, | |
5864 | "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR, | |
5865 | LOG_UNIT_MESSAGE(u, "%s exited, code=%s, status=%i/%s", | |
5866 | kind, | |
5867 | sigchld_code_to_string(code), status, | |
5868 | strna(code == CLD_EXITED | |
5869 | ? exit_status_to_string(status, EXIT_STATUS_FULL) | |
5870 | : signal_to_string(status))), | |
5871 | "EXIT_CODE=%s", sigchld_code_to_string(code), | |
5872 | "EXIT_STATUS=%i", status, | |
5873 | "COMMAND=%s", strna(command), | |
5874 | LOG_UNIT_ID(u), | |
5875 | LOG_UNIT_INVOCATION_ID(u)); | |
5876 | } | |
5877 | ||
7af67e9a LP |
5878 | int unit_exit_status(Unit *u) { |
5879 | assert(u); | |
5880 | ||
5881 | /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range | |
5882 | * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA | |
5883 | * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main | |
5884 | * service process has exited abnormally (signal/coredump). */ | |
5885 | ||
5886 | if (!UNIT_VTABLE(u)->exit_status) | |
5887 | return -EOPNOTSUPP; | |
5888 | ||
5889 | return UNIT_VTABLE(u)->exit_status(u); | |
5890 | } | |
5891 | ||
5892 | int unit_failure_action_exit_status(Unit *u) { | |
5893 | int r; | |
5894 | ||
5895 | assert(u); | |
5896 | ||
5897 | /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */ | |
5898 | ||
5899 | if (u->failure_action_exit_status >= 0) | |
5900 | return u->failure_action_exit_status; | |
5901 | ||
5902 | r = unit_exit_status(u); | |
5903 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5904 | return 255; | |
5905 | ||
5906 | return r; | |
5907 | } | |
5908 | ||
5909 | int unit_success_action_exit_status(Unit *u) { | |
5910 | int r; | |
5911 | ||
5912 | assert(u); | |
5913 | ||
5914 | /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */ | |
5915 | ||
5916 | if (u->success_action_exit_status >= 0) | |
5917 | return u->success_action_exit_status; | |
5918 | ||
5919 | r = unit_exit_status(u); | |
5920 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5921 | return 255; | |
5922 | ||
5923 | return r; | |
5924 | } | |
5925 | ||
a4191c9f LP |
5926 | int unit_test_trigger_loaded(Unit *u) { |
5927 | Unit *trigger; | |
5928 | ||
5929 | /* Tests whether the unit to trigger is loaded */ | |
5930 | ||
5931 | trigger = UNIT_TRIGGER(u); | |
5932 | if (!trigger) | |
e7b9f4d9 ZJS |
5933 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
5934 | "Refusing to start, no unit to trigger."); | |
a4191c9f | 5935 | if (trigger->load_state != UNIT_LOADED) |
e7b9f4d9 ZJS |
5936 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
5937 | "Refusing to start, unit %s to trigger not loaded.", trigger->id); | |
a4191c9f LP |
5938 | |
5939 | return 0; | |
5940 | } | |
5941 | ||
95939aed YW |
5942 | void unit_destroy_runtime_directory(Unit *u, const ExecContext *context) { |
5943 | if (context->runtime_directory_preserve_mode == EXEC_PRESERVE_NO || | |
5944 | (context->runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART && !unit_will_restart(u))) | |
5945 | exec_context_destroy_runtime_directory(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME]); | |
5946 | } | |
5947 | ||
380dc8b0 LP |
5948 | int unit_clean(Unit *u, ExecCleanMask mask) { |
5949 | UnitActiveState state; | |
5950 | ||
5951 | assert(u); | |
5952 | ||
5953 | /* Special return values: | |
5954 | * | |
5955 | * -EOPNOTSUPP → cleaning not supported for this unit type | |
5956 | * -EUNATCH → cleaning not defined for this resource type | |
5957 | * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has | |
5958 | * a job queued or similar | |
5959 | */ | |
5960 | ||
5961 | if (!UNIT_VTABLE(u)->clean) | |
5962 | return -EOPNOTSUPP; | |
5963 | ||
5964 | if (mask == 0) | |
5965 | return -EUNATCH; | |
5966 | ||
5967 | if (u->load_state != UNIT_LOADED) | |
5968 | return -EBUSY; | |
5969 | ||
5970 | if (u->job) | |
5971 | return -EBUSY; | |
5972 | ||
5973 | state = unit_active_state(u); | |
5974 | if (!IN_SET(state, UNIT_INACTIVE)) | |
5975 | return -EBUSY; | |
5976 | ||
5977 | return UNIT_VTABLE(u)->clean(u, mask); | |
5978 | } | |
5979 | ||
5980 | int unit_can_clean(Unit *u, ExecCleanMask *ret) { | |
5981 | assert(u); | |
5982 | ||
5983 | if (!UNIT_VTABLE(u)->clean || | |
5984 | u->load_state != UNIT_LOADED) { | |
5985 | *ret = 0; | |
5986 | return 0; | |
5987 | } | |
5988 | ||
5989 | /* When the clean() method is set, can_clean() really should be set too */ | |
5990 | assert(UNIT_VTABLE(u)->can_clean); | |
5991 | ||
5992 | return UNIT_VTABLE(u)->can_clean(u, ret); | |
5993 | } | |
5994 | ||
5afe510c LP |
5995 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
5996 | [COLLECT_INACTIVE] = "inactive", | |
5997 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
5998 | }; | |
5999 | ||
6000 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); |