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a032b68d | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
663996b3 | 2 | |
663996b3 | 3 | #include <errno.h> |
663996b3 | 4 | #include <stdlib.h> |
1d42b86d | 5 | #include <sys/prctl.h> |
db2df898 | 6 | #include <unistd.h> |
663996b3 | 7 | |
60f067b4 JS |
8 | #include "sd-id128.h" |
9 | #include "sd-messages.h" | |
db2df898 | 10 | |
b012e921 | 11 | #include "all-units.h" |
6e866b33 | 12 | #include "alloc-util.h" |
f2dec872 | 13 | #include "bpf-firewall.h" |
8b3d4ff0 MB |
14 | #include "bpf-foreign.h" |
15 | #include "bpf-socket-bind.h" | |
db2df898 MP |
16 | #include "bus-common-errors.h" |
17 | #include "bus-util.h" | |
e1f67bc7 | 18 | #include "cgroup-setup.h" |
663996b3 | 19 | #include "cgroup-util.h" |
ea0999c9 | 20 | #include "chase-symlinks.h" |
a032b68d | 21 | #include "core-varlink.h" |
db2df898 MP |
22 | #include "dbus-unit.h" |
23 | #include "dbus.h" | |
24 | #include "dropin.h" | |
25 | #include "escape.h" | |
26 | #include "execute.h" | |
f5e65279 | 27 | #include "fd-util.h" |
663996b3 | 28 | #include "fileio-label.h" |
6e866b33 | 29 | #include "fileio.h" |
2897b343 | 30 | #include "format-util.h" |
8a584da2 | 31 | #include "id128-util.h" |
f2dec872 | 32 | #include "install.h" |
3a6ce677 | 33 | #include "io-util.h" |
a032b68d | 34 | #include "label.h" |
db2df898 MP |
35 | #include "load-dropin.h" |
36 | #include "load-fragment.h" | |
37 | #include "log.h" | |
38 | #include "macro.h" | |
e1f67bc7 | 39 | #include "missing_audit.h" |
ea0999c9 | 40 | #include "mkdir-label.h" |
db2df898 | 41 | #include "path-util.h" |
e3bff60a | 42 | #include "process-util.h" |
e1f67bc7 | 43 | #include "rm-rf.h" |
086111aa | 44 | #include "serialize.h" |
db2df898 | 45 | #include "set.h" |
aa27b158 | 46 | #include "signal-util.h" |
52ad194e | 47 | #include "sparse-endian.h" |
d9dfd233 | 48 | #include "special.h" |
52ad194e | 49 | #include "specifier.h" |
db2df898 | 50 | #include "stat-util.h" |
4c89c718 | 51 | #include "stdio-util.h" |
52ad194e | 52 | #include "string-table.h" |
db2df898 MP |
53 | #include "string-util.h" |
54 | #include "strv.h" | |
6e866b33 MB |
55 | #include "terminal-util.h" |
56 | #include "tmpfile-util.h" | |
aa27b158 | 57 | #include "umask-util.h" |
db2df898 | 58 | #include "unit-name.h" |
d9dfd233 | 59 | #include "unit.h" |
db2df898 MP |
60 | #include "user-util.h" |
61 | #include "virt.h" | |
8b3d4ff0 MB |
62 | #if BPF_FRAMEWORK |
63 | #include "bpf-link.h" | |
64 | #endif | |
663996b3 | 65 | |
f2dec872 BR |
66 | /* Thresholds for logging at INFO level about resource consumption */ |
67 | #define MENTIONWORTHY_CPU_NSEC (1 * NSEC_PER_SEC) | |
68 | #define MENTIONWORTHY_IO_BYTES (1024 * 1024ULL) | |
69 | #define MENTIONWORTHY_IP_BYTES (0ULL) | |
70 | ||
71 | /* Thresholds for logging at INFO level about resource consumption */ | |
72 | #define NOTICEWORTHY_CPU_NSEC (10*60 * NSEC_PER_SEC) /* 10 minutes */ | |
73 | #define NOTICEWORTHY_IO_BYTES (10 * 1024 * 1024ULL) /* 10 MB */ | |
74 | #define NOTICEWORTHY_IP_BYTES (128 * 1024 * 1024ULL) /* 128 MB */ | |
75 | ||
663996b3 MS |
76 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { |
77 | [UNIT_SERVICE] = &service_vtable, | |
663996b3 MS |
78 | [UNIT_SOCKET] = &socket_vtable, |
79 | [UNIT_TARGET] = &target_vtable, | |
80 | [UNIT_DEVICE] = &device_vtable, | |
81 | [UNIT_MOUNT] = &mount_vtable, | |
82 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
663996b3 | 83 | [UNIT_SWAP] = &swap_vtable, |
60f067b4 | 84 | [UNIT_TIMER] = &timer_vtable, |
14228c0d MB |
85 | [UNIT_PATH] = &path_vtable, |
86 | [UNIT_SLICE] = &slice_vtable, | |
52ad194e | 87 | [UNIT_SCOPE] = &scope_vtable, |
663996b3 MS |
88 | }; |
89 | ||
3a6ce677 | 90 | Unit* unit_new(Manager *m, size_t size) { |
663996b3 MS |
91 | Unit *u; |
92 | ||
93 | assert(m); | |
94 | assert(size >= sizeof(Unit)); | |
95 | ||
96 | u = malloc0(size); | |
97 | if (!u) | |
98 | return NULL; | |
99 | ||
663996b3 MS |
100 | u->manager = m; |
101 | u->type = _UNIT_TYPE_INVALID; | |
663996b3 MS |
102 | u->default_dependencies = true; |
103 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
f47781d8 | 104 | u->unit_file_preset = -1; |
60f067b4 | 105 | u->on_failure_job_mode = JOB_REPLACE; |
8b3d4ff0 | 106 | u->on_success_job_mode = JOB_FAIL; |
f2dec872 BR |
107 | u->cgroup_control_inotify_wd = -1; |
108 | u->cgroup_memory_inotify_wd = -1; | |
4c89c718 | 109 | u->job_timeout = USEC_INFINITY; |
81c58355 | 110 | u->job_running_timeout = USEC_INFINITY; |
8a584da2 MP |
111 | u->ref_uid = UID_INVALID; |
112 | u->ref_gid = GID_INVALID; | |
113 | u->cpu_usage_last = NSEC_INFINITY; | |
6e866b33 MB |
114 | u->cgroup_invalidated_mask |= CGROUP_MASK_BPF_FIREWALL; |
115 | u->failure_action_exit_status = u->success_action_exit_status = -1; | |
663996b3 | 116 | |
f5e65279 MB |
117 | u->ip_accounting_ingress_map_fd = -1; |
118 | u->ip_accounting_egress_map_fd = -1; | |
8b3d4ff0 MB |
119 | for (CGroupIOAccountingMetric i = 0; i < _CGROUP_IO_ACCOUNTING_METRIC_MAX; i++) |
120 | u->io_accounting_last[i] = UINT64_MAX; | |
121 | ||
f5e65279 MB |
122 | u->ipv4_allow_map_fd = -1; |
123 | u->ipv6_allow_map_fd = -1; | |
124 | u->ipv4_deny_map_fd = -1; | |
125 | u->ipv6_deny_map_fd = -1; | |
126 | ||
52ad194e MB |
127 | u->last_section_private = -1; |
128 | ||
e1f67bc7 | 129 | u->start_ratelimit = (RateLimit) { m->default_start_limit_interval, m->default_start_limit_burst }; |
8b3d4ff0 | 130 | u->auto_start_stop_ratelimit = (RateLimit) { 10 * USEC_PER_SEC, 16 }; |
f2dec872 | 131 | |
663996b3 MS |
132 | return u; |
133 | } | |
134 | ||
8a584da2 | 135 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
b012e921 | 136 | _cleanup_(unit_freep) Unit *u = NULL; |
8a584da2 MP |
137 | int r; |
138 | ||
139 | u = unit_new(m, size); | |
140 | if (!u) | |
141 | return -ENOMEM; | |
142 | ||
143 | r = unit_add_name(u, name); | |
b012e921 | 144 | if (r < 0) |
8a584da2 | 145 | return r; |
8a584da2 | 146 | |
b012e921 MB |
147 | *ret = TAKE_PTR(u); |
148 | ||
8a584da2 MP |
149 | return r; |
150 | } | |
151 | ||
6e866b33 | 152 | bool unit_has_name(const Unit *u, const char *name) { |
663996b3 MS |
153 | assert(u); |
154 | assert(name); | |
155 | ||
a10f5d05 MB |
156 | return streq_ptr(name, u->id) || |
157 | set_contains(u->aliases, name); | |
663996b3 MS |
158 | } |
159 | ||
60f067b4 JS |
160 | static void unit_init(Unit *u) { |
161 | CGroupContext *cc; | |
162 | ExecContext *ec; | |
163 | KillContext *kc; | |
164 | ||
165 | assert(u); | |
166 | assert(u->manager); | |
167 | assert(u->type >= 0); | |
168 | ||
169 | cc = unit_get_cgroup_context(u); | |
170 | if (cc) { | |
171 | cgroup_context_init(cc); | |
172 | ||
173 | /* Copy in the manager defaults into the cgroup | |
174 | * context, _before_ the rest of the settings have | |
175 | * been initialized */ | |
176 | ||
177 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
aa27b158 | 178 | cc->io_accounting = u->manager->default_io_accounting; |
60f067b4 JS |
179 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
180 | cc->memory_accounting = u->manager->default_memory_accounting; | |
6300502b | 181 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
f5e65279 | 182 | cc->ip_accounting = u->manager->default_ip_accounting; |
db2df898 MP |
183 | |
184 | if (u->type != UNIT_SLICE) | |
185 | cc->tasks_max = u->manager->default_tasks_max; | |
60f067b4 JS |
186 | } |
187 | ||
188 | ec = unit_get_exec_context(u); | |
f5e65279 | 189 | if (ec) { |
60f067b4 JS |
190 | exec_context_init(ec); |
191 | ||
ea0999c9 MB |
192 | if (u->manager->default_oom_score_adjust_set) { |
193 | ec->oom_score_adjust = u->manager->default_oom_score_adjust; | |
194 | ec->oom_score_adjust_set = true; | |
195 | } | |
196 | ||
a10f5d05 MB |
197 | if (MANAGER_IS_SYSTEM(u->manager)) |
198 | ec->keyring_mode = EXEC_KEYRING_SHARED; | |
199 | else { | |
200 | ec->keyring_mode = EXEC_KEYRING_INHERIT; | |
201 | ||
202 | /* User manager might have its umask redefined by PAM or UMask=. In this | |
203 | * case let the units it manages inherit this value by default. They can | |
204 | * still tune this value through their own unit file */ | |
205 | (void) get_process_umask(getpid_cached(), &ec->umask); | |
206 | } | |
f5e65279 MB |
207 | } |
208 | ||
60f067b4 JS |
209 | kc = unit_get_kill_context(u); |
210 | if (kc) | |
211 | kill_context_init(kc); | |
212 | ||
213 | if (UNIT_VTABLE(u)->init) | |
214 | UNIT_VTABLE(u)->init(u); | |
215 | } | |
216 | ||
a10f5d05 MB |
217 | static int unit_add_alias(Unit *u, char *donated_name) { |
218 | int r; | |
219 | ||
220 | /* Make sure that u->names is allocated. We may leave u->names | |
221 | * empty if we fail later, but this is not a problem. */ | |
a032b68d | 222 | r = set_ensure_put(&u->aliases, &string_hash_ops, donated_name); |
a10f5d05 MB |
223 | if (r < 0) |
224 | return r; | |
225 | assert(r > 0); | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
663996b3 | 230 | int unit_add_name(Unit *u, const char *text) { |
a10f5d05 | 231 | _cleanup_free_ char *name = NULL, *instance = NULL; |
663996b3 | 232 | UnitType t; |
663996b3 MS |
233 | int r; |
234 | ||
235 | assert(u); | |
236 | assert(text); | |
237 | ||
e3bff60a | 238 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
663996b3 | 239 | if (!u->instance) |
a10f5d05 MB |
240 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
241 | "instance is not set when adding name '%s': %m", text); | |
663996b3 | 242 | |
a10f5d05 | 243 | r = unit_name_replace_instance(text, u->instance, &name); |
e3bff60a | 244 | if (r < 0) |
a10f5d05 MB |
245 | return log_unit_debug_errno(u, r, |
246 | "failed to build instance name from '%s': %m", text); | |
e3bff60a | 247 | } else { |
a10f5d05 MB |
248 | name = strdup(text); |
249 | if (!name) | |
e3bff60a MP |
250 | return -ENOMEM; |
251 | } | |
252 | ||
a10f5d05 | 253 | if (unit_has_name(u, name)) |
e3bff60a | 254 | return 0; |
663996b3 | 255 | |
a10f5d05 MB |
256 | if (hashmap_contains(u->manager->units, name)) |
257 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EEXIST), | |
258 | "unit already exist when adding name '%s': %m", name); | |
259 | ||
260 | if (!unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
261 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
262 | "name '%s' is invalid: %m", name); | |
663996b3 | 263 | |
a10f5d05 | 264 | t = unit_name_to_type(name); |
e3bff60a | 265 | if (t < 0) |
a10f5d05 MB |
266 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
267 | "failed to derive unit type from name '%s': %m", name); | |
663996b3 | 268 | |
60f067b4 | 269 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
a10f5d05 MB |
270 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
271 | "unit type is illegal: u->type(%d) and t(%d) for name '%s': %m", | |
272 | u->type, t, name); | |
663996b3 | 273 | |
a10f5d05 | 274 | r = unit_name_to_instance(name, &instance); |
60f067b4 | 275 | if (r < 0) |
a10f5d05 | 276 | return log_unit_debug_errno(u, r, "failed to extract instance from name '%s': %m", name); |
663996b3 | 277 | |
a10f5d05 MB |
278 | if (instance && !unit_type_may_template(t)) |
279 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), "templates are not allowed for name '%s': %m", name); | |
663996b3 | 280 | |
a10f5d05 MB |
281 | /* Ensure that this unit either has no instance, or that the instance matches. */ |
282 | if (u->type != _UNIT_TYPE_INVALID && !streq_ptr(u->instance, instance)) | |
283 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
284 | "cannot add name %s, the instances don't match (\"%s\" != \"%s\").", | |
285 | name, instance, u->instance); | |
663996b3 | 286 | |
a10f5d05 MB |
287 | if (u->id && !unit_type_may_alias(t)) |
288 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EEXIST), | |
289 | "cannot add name %s, aliases are not allowed for %s units.", | |
290 | name, unit_type_to_string(t)); | |
663996b3 | 291 | |
60f067b4 | 292 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
a10f5d05 | 293 | return log_unit_warning_errno(u, SYNTHETIC_ERRNO(E2BIG), "cannot add name, manager has too many units: %m"); |
663996b3 | 294 | |
a10f5d05 MB |
295 | /* Add name to the global hashmap first, because that's easier to undo */ |
296 | r = hashmap_put(u->manager->units, name, u); | |
e3bff60a | 297 | if (r < 0) |
a10f5d05 | 298 | return log_unit_debug_errno(u, r, "add unit to hashmap failed for name '%s': %m", text); |
663996b3 | 299 | |
a10f5d05 MB |
300 | if (u->id) { |
301 | r = unit_add_alias(u, name); /* unit_add_alias() takes ownership of the name on success */ | |
302 | if (r < 0) { | |
303 | hashmap_remove(u->manager->units, name); | |
304 | return r; | |
305 | } | |
306 | TAKE_PTR(name); | |
307 | ||
308 | } else { | |
309 | /* A new name, we don't need the set yet. */ | |
310 | assert(u->type == _UNIT_TYPE_INVALID); | |
311 | assert(!u->instance); | |
663996b3 | 312 | |
663996b3 | 313 | u->type = t; |
a10f5d05 MB |
314 | u->id = TAKE_PTR(name); |
315 | u->instance = TAKE_PTR(instance); | |
663996b3 | 316 | |
60f067b4 | 317 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
60f067b4 | 318 | unit_init(u); |
60f067b4 | 319 | } |
663996b3 | 320 | |
60f067b4 JS |
321 | unit_add_to_dbus_queue(u); |
322 | return 0; | |
663996b3 MS |
323 | } |
324 | ||
325 | int unit_choose_id(Unit *u, const char *name) { | |
14228c0d | 326 | _cleanup_free_ char *t = NULL; |
a10f5d05 | 327 | char *s; |
663996b3 MS |
328 | int r; |
329 | ||
330 | assert(u); | |
331 | assert(name); | |
332 | ||
e3bff60a | 333 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
663996b3 MS |
334 | if (!u->instance) |
335 | return -EINVAL; | |
336 | ||
e3bff60a MP |
337 | r = unit_name_replace_instance(name, u->instance, &t); |
338 | if (r < 0) | |
339 | return r; | |
663996b3 MS |
340 | |
341 | name = t; | |
342 | } | |
343 | ||
a10f5d05 MB |
344 | if (streq_ptr(u->id, name)) |
345 | return 0; /* Nothing to do. */ | |
346 | ||
347 | /* Selects one of the aliases of this unit as the id */ | |
348 | s = set_get(u->aliases, (char*) name); | |
663996b3 MS |
349 | if (!s) |
350 | return -ENOENT; | |
351 | ||
a10f5d05 MB |
352 | if (u->id) { |
353 | r = set_remove_and_put(u->aliases, name, u->id); | |
354 | if (r < 0) | |
355 | return r; | |
356 | } else | |
357 | assert_se(set_remove(u->aliases, name)); /* see set_get() above… */ | |
663996b3 | 358 | |
a10f5d05 | 359 | u->id = s; /* Old u->id is now stored in the set, and s is not stored anywhere */ |
663996b3 MS |
360 | unit_add_to_dbus_queue(u); |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
365 | int unit_set_description(Unit *u, const char *description) { | |
f5e65279 | 366 | int r; |
663996b3 MS |
367 | |
368 | assert(u); | |
369 | ||
f5e65279 MB |
370 | r = free_and_strdup(&u->description, empty_to_null(description)); |
371 | if (r < 0) | |
372 | return r; | |
373 | if (r > 0) | |
374 | unit_add_to_dbus_queue(u); | |
663996b3 | 375 | |
663996b3 MS |
376 | return 0; |
377 | } | |
378 | ||
f5caa8fa MB |
379 | static bool unit_success_failure_handler_has_jobs(Unit *unit) { |
380 | Unit *other; | |
381 | ||
382 | UNIT_FOREACH_DEPENDENCY(other, unit, UNIT_ATOM_ON_SUCCESS) | |
383 | if (other->job || other->nop_job) | |
384 | return true; | |
385 | ||
386 | UNIT_FOREACH_DEPENDENCY(other, unit, UNIT_ATOM_ON_FAILURE) | |
387 | if (other->job || other->nop_job) | |
388 | return true; | |
389 | ||
390 | return false; | |
391 | } | |
392 | ||
98393f85 | 393 | bool unit_may_gc(Unit *u) { |
e735f4d4 | 394 | UnitActiveState state; |
52ad194e MB |
395 | int r; |
396 | ||
663996b3 MS |
397 | assert(u); |
398 | ||
98393f85 MB |
399 | /* Checks whether the unit is ready to be unloaded for garbage collection. |
400 | * Returns true when the unit may be collected, and false if there's some | |
401 | * reason to keep it loaded. | |
402 | * | |
403 | * References from other units are *not* checked here. Instead, this is done | |
404 | * in unit_gc_sweep(), but using markers to properly collect dependency loops. | |
405 | */ | |
52ad194e | 406 | |
f5caa8fa | 407 | if (u->job || u->nop_job) |
98393f85 | 408 | return false; |
663996b3 | 409 | |
e735f4d4 MP |
410 | state = unit_active_state(u); |
411 | ||
52ad194e | 412 | /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */ |
e735f4d4 MP |
413 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && |
414 | UNIT_VTABLE(u)->release_resources) | |
52ad194e | 415 | UNIT_VTABLE(u)->release_resources(u); |
663996b3 | 416 | |
8a584da2 | 417 | if (u->perpetual) |
98393f85 | 418 | return false; |
663996b3 | 419 | |
8a584da2 | 420 | if (sd_bus_track_count(u->bus_track) > 0) |
98393f85 | 421 | return false; |
8a584da2 | 422 | |
52ad194e MB |
423 | /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */ |
424 | switch (u->collect_mode) { | |
425 | ||
426 | case COLLECT_INACTIVE: | |
427 | if (state != UNIT_INACTIVE) | |
98393f85 | 428 | return false; |
52ad194e MB |
429 | |
430 | break; | |
431 | ||
432 | case COLLECT_INACTIVE_OR_FAILED: | |
433 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
98393f85 | 434 | return false; |
52ad194e MB |
435 | |
436 | break; | |
437 | ||
438 | default: | |
ea0999c9 | 439 | assert_not_reached(); |
52ad194e MB |
440 | } |
441 | ||
f5caa8fa MB |
442 | /* Check if any OnFailure= or on Success= jobs may be pending */ |
443 | if (unit_success_failure_handler_has_jobs(u)) | |
444 | return false; | |
445 | ||
52ad194e MB |
446 | if (u->cgroup_path) { |
447 | /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay | |
448 | * around. Units with active processes should never be collected. */ | |
449 | ||
450 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
451 | if (r < 0) | |
9d669329 | 452 | log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", empty_to_root(u->cgroup_path)); |
52ad194e | 453 | if (r <= 0) |
98393f85 | 454 | return false; |
52ad194e MB |
455 | } |
456 | ||
98393f85 MB |
457 | if (UNIT_VTABLE(u)->may_gc && !UNIT_VTABLE(u)->may_gc(u)) |
458 | return false; | |
663996b3 | 459 | |
98393f85 | 460 | return true; |
663996b3 MS |
461 | } |
462 | ||
463 | void unit_add_to_load_queue(Unit *u) { | |
464 | assert(u); | |
465 | assert(u->type != _UNIT_TYPE_INVALID); | |
466 | ||
467 | if (u->load_state != UNIT_STUB || u->in_load_queue) | |
468 | return; | |
469 | ||
60f067b4 | 470 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
663996b3 MS |
471 | u->in_load_queue = true; |
472 | } | |
473 | ||
474 | void unit_add_to_cleanup_queue(Unit *u) { | |
475 | assert(u); | |
476 | ||
477 | if (u->in_cleanup_queue) | |
478 | return; | |
479 | ||
60f067b4 | 480 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
663996b3 MS |
481 | u->in_cleanup_queue = true; |
482 | } | |
483 | ||
484 | void unit_add_to_gc_queue(Unit *u) { | |
485 | assert(u); | |
486 | ||
487 | if (u->in_gc_queue || u->in_cleanup_queue) | |
488 | return; | |
489 | ||
98393f85 | 490 | if (!unit_may_gc(u)) |
663996b3 MS |
491 | return; |
492 | ||
2897b343 | 493 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
663996b3 | 494 | u->in_gc_queue = true; |
663996b3 MS |
495 | } |
496 | ||
497 | void unit_add_to_dbus_queue(Unit *u) { | |
498 | assert(u); | |
499 | assert(u->type != _UNIT_TYPE_INVALID); | |
500 | ||
501 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) | |
502 | return; | |
503 | ||
504 | /* Shortcut things if nobody cares */ | |
60f067b4 | 505 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
2897b343 | 506 | sd_bus_track_count(u->bus_track) <= 0 && |
60f067b4 | 507 | set_isempty(u->manager->private_buses)) { |
663996b3 MS |
508 | u->sent_dbus_new_signal = true; |
509 | return; | |
510 | } | |
511 | ||
60f067b4 | 512 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
663996b3 MS |
513 | u->in_dbus_queue = true; |
514 | } | |
515 | ||
6e866b33 MB |
516 | void unit_submit_to_stop_when_unneeded_queue(Unit *u) { |
517 | assert(u); | |
518 | ||
519 | if (u->in_stop_when_unneeded_queue) | |
520 | return; | |
521 | ||
522 | if (!u->stop_when_unneeded) | |
523 | return; | |
524 | ||
525 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
526 | return; | |
527 | ||
528 | LIST_PREPEND(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
529 | u->in_stop_when_unneeded_queue = true; | |
530 | } | |
531 | ||
8b3d4ff0 MB |
532 | void unit_submit_to_start_when_upheld_queue(Unit *u) { |
533 | assert(u); | |
534 | ||
535 | if (u->in_start_when_upheld_queue) | |
536 | return; | |
537 | ||
538 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u))) | |
539 | return; | |
663996b3 | 540 | |
8b3d4ff0 MB |
541 | if (!unit_has_dependency(u, UNIT_ATOM_START_STEADILY, NULL)) |
542 | return; | |
543 | ||
544 | LIST_PREPEND(start_when_upheld_queue, u->manager->start_when_upheld_queue, u); | |
545 | u->in_start_when_upheld_queue = true; | |
546 | } | |
547 | ||
548 | void unit_submit_to_stop_when_bound_queue(Unit *u) { | |
663996b3 MS |
549 | assert(u); |
550 | ||
8b3d4ff0 MB |
551 | if (u->in_stop_when_bound_queue) |
552 | return; | |
553 | ||
554 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
555 | return; | |
556 | ||
557 | if (!unit_has_dependency(u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT, NULL)) | |
558 | return; | |
663996b3 | 559 | |
8b3d4ff0 MB |
560 | LIST_PREPEND(stop_when_bound_queue, u->manager->stop_when_bound_queue, u); |
561 | u->in_stop_when_bound_queue = true; | |
562 | } | |
663996b3 | 563 | |
8b3d4ff0 MB |
564 | static void unit_clear_dependencies(Unit *u) { |
565 | assert(u); | |
566 | ||
567 | /* Removes all dependencies configured on u and their reverse dependencies. */ | |
568 | ||
569 | for (Hashmap *deps; (deps = hashmap_steal_first(u->dependencies));) { | |
570 | ||
571 | for (Unit *other; (other = hashmap_steal_first_key(deps));) { | |
572 | Hashmap *other_deps; | |
573 | ||
574 | HASHMAP_FOREACH(other_deps, other->dependencies) | |
575 | hashmap_remove(other_deps, u); | |
576 | ||
577 | unit_add_to_gc_queue(other); | |
578 | } | |
579 | ||
580 | hashmap_free(deps); | |
663996b3 MS |
581 | } |
582 | ||
8b3d4ff0 | 583 | u->dependencies = hashmap_free(u->dependencies); |
663996b3 MS |
584 | } |
585 | ||
14228c0d | 586 | static void unit_remove_transient(Unit *u) { |
14228c0d MB |
587 | assert(u); |
588 | ||
589 | if (!u->transient) | |
590 | return; | |
591 | ||
592 | if (u->fragment_path) | |
d9dfd233 | 593 | (void) unlink(u->fragment_path); |
14228c0d MB |
594 | |
595 | STRV_FOREACH(i, u->dropin_paths) { | |
aa27b158 | 596 | _cleanup_free_ char *p = NULL, *pp = NULL; |
14228c0d | 597 | |
086111aa | 598 | if (path_extract_directory(*i, &p) < 0) /* Get the drop-in directory from the drop-in file */ |
aa27b158 MP |
599 | continue; |
600 | ||
086111aa | 601 | if (path_extract_directory(p, &pp) < 0) /* Get the config directory from the drop-in directory */ |
aa27b158 | 602 | continue; |
14228c0d | 603 | |
aa27b158 MP |
604 | /* Only drop transient drop-ins */ |
605 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
606 | continue; | |
607 | ||
608 | (void) unlink(*i); | |
609 | (void) rmdir(p); | |
14228c0d MB |
610 | } |
611 | } | |
612 | ||
613 | static void unit_free_requires_mounts_for(Unit *u) { | |
52ad194e MB |
614 | assert(u); |
615 | ||
616 | for (;;) { | |
5b5a102a | 617 | _cleanup_free_ char *path = NULL; |
14228c0d | 618 | |
52ad194e MB |
619 | path = hashmap_steal_first_key(u->requires_mounts_for); |
620 | if (!path) | |
621 | break; | |
622 | else { | |
623 | char s[strlen(path) + 1]; | |
14228c0d | 624 | |
52ad194e MB |
625 | PATH_FOREACH_PREFIX_MORE(s, path) { |
626 | char *y; | |
627 | Set *x; | |
14228c0d | 628 | |
52ad194e MB |
629 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); |
630 | if (!x) | |
631 | continue; | |
14228c0d | 632 | |
52ad194e | 633 | (void) set_remove(x, u); |
14228c0d | 634 | |
52ad194e MB |
635 | if (set_isempty(x)) { |
636 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
637 | free(y); | |
638 | set_free(x); | |
639 | } | |
14228c0d MB |
640 | } |
641 | } | |
642 | } | |
643 | ||
52ad194e | 644 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
14228c0d MB |
645 | } |
646 | ||
60f067b4 JS |
647 | static void unit_done(Unit *u) { |
648 | ExecContext *ec; | |
649 | CGroupContext *cc; | |
650 | ||
651 | assert(u); | |
652 | ||
653 | if (u->type < 0) | |
654 | return; | |
655 | ||
656 | if (UNIT_VTABLE(u)->done) | |
657 | UNIT_VTABLE(u)->done(u); | |
658 | ||
659 | ec = unit_get_exec_context(u); | |
660 | if (ec) | |
661 | exec_context_done(ec); | |
662 | ||
663 | cc = unit_get_cgroup_context(u); | |
664 | if (cc) | |
665 | cgroup_context_done(cc); | |
666 | } | |
667 | ||
3a6ce677 | 668 | Unit* unit_free(Unit *u) { |
8b3d4ff0 | 669 | Unit *slice; |
663996b3 MS |
670 | char *t; |
671 | ||
2897b343 | 672 | if (!u) |
3a6ce677 | 673 | return NULL; |
663996b3 | 674 | |
52ad194e | 675 | u->transient_file = safe_fclose(u->transient_file); |
aa27b158 MP |
676 | |
677 | if (!MANAGER_IS_RELOADING(u->manager)) | |
14228c0d MB |
678 | unit_remove_transient(u); |
679 | ||
663996b3 MS |
680 | bus_unit_send_removed_signal(u); |
681 | ||
60f067b4 | 682 | unit_done(u); |
663996b3 | 683 | |
b012e921 | 684 | unit_dequeue_rewatch_pids(u); |
13d276d0 | 685 | |
b3e21333 LB |
686 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
687 | u->bus_track = sd_bus_track_unref(u->bus_track); | |
8a584da2 | 688 | u->deserialized_refs = strv_free(u->deserialized_refs); |
a10f5d05 | 689 | u->pending_freezer_message = sd_bus_message_unref(u->pending_freezer_message); |
8a584da2 | 690 | |
14228c0d MB |
691 | unit_free_requires_mounts_for(u); |
692 | ||
a032b68d | 693 | SET_FOREACH(t, u->aliases) |
663996b3 | 694 | hashmap_remove_value(u->manager->units, t, u); |
a10f5d05 MB |
695 | if (u->id) |
696 | hashmap_remove_value(u->manager->units, u->id, u); | |
663996b3 | 697 | |
8a584da2 MP |
698 | if (!sd_id128_is_null(u->invocation_id)) |
699 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
700 | ||
663996b3 MS |
701 | if (u->job) { |
702 | Job *j = u->job; | |
703 | job_uninstall(j); | |
704 | job_free(j); | |
705 | } | |
706 | ||
707 | if (u->nop_job) { | |
708 | Job *j = u->nop_job; | |
709 | job_uninstall(j); | |
710 | job_free(j); | |
711 | } | |
712 | ||
a032b68d MB |
713 | /* A unit is being dropped from the tree, make sure our family is realized properly. Do this after we |
714 | * detach the unit from slice tree in order to eliminate its effect on controller masks. */ | |
8b3d4ff0 MB |
715 | slice = UNIT_GET_SLICE(u); |
716 | unit_clear_dependencies(u); | |
717 | if (slice) | |
718 | unit_add_family_to_cgroup_realize_queue(slice); | |
a032b68d | 719 | |
98393f85 MB |
720 | if (u->on_console) |
721 | manager_unref_console(u->manager); | |
722 | ||
8b3d4ff0 MB |
723 | |
724 | fdset_free(u->initial_socket_bind_link_fds); | |
725 | #if BPF_FRAMEWORK | |
726 | bpf_link_free(u->ipv4_socket_bind_link); | |
727 | bpf_link_free(u->ipv6_socket_bind_link); | |
728 | #endif | |
729 | ||
98393f85 MB |
730 | unit_release_cgroup(u); |
731 | ||
732 | if (!MANAGER_IS_RELOADING(u->manager)) | |
733 | unit_unlink_state_files(u); | |
734 | ||
735 | unit_unref_uid_gid(u, false); | |
736 | ||
737 | (void) manager_update_failed_units(u->manager, u, false); | |
738 | set_remove(u->manager->startup_units, u); | |
739 | ||
740 | unit_unwatch_all_pids(u); | |
741 | ||
98393f85 MB |
742 | while (u->refs_by_target) |
743 | unit_ref_unset(u->refs_by_target); | |
744 | ||
663996b3 | 745 | if (u->type != _UNIT_TYPE_INVALID) |
60f067b4 | 746 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
663996b3 MS |
747 | |
748 | if (u->in_load_queue) | |
60f067b4 | 749 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
663996b3 MS |
750 | |
751 | if (u->in_dbus_queue) | |
60f067b4 | 752 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
663996b3 | 753 | |
2c6f20ef MB |
754 | if (u->in_cleanup_queue) |
755 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
756 | ||
2897b343 MP |
757 | if (u->in_gc_queue) |
758 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); | |
663996b3 | 759 | |
f5e65279 MB |
760 | if (u->in_cgroup_realize_queue) |
761 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
762 | ||
763 | if (u->in_cgroup_empty_queue) | |
764 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
14228c0d | 765 | |
2c6f20ef MB |
766 | if (u->in_cgroup_oom_queue) |
767 | LIST_REMOVE(cgroup_oom_queue, u->manager->cgroup_oom_queue, u); | |
1d42b86d | 768 | |
b012e921 MB |
769 | if (u->in_target_deps_queue) |
770 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
771 | ||
6e866b33 MB |
772 | if (u->in_stop_when_unneeded_queue) |
773 | LIST_REMOVE(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
774 | ||
8b3d4ff0 MB |
775 | if (u->in_start_when_upheld_queue) |
776 | LIST_REMOVE(start_when_upheld_queue, u->manager->start_when_upheld_queue, u); | |
663996b3 | 777 | |
8b3d4ff0 MB |
778 | if (u->in_stop_when_bound_queue) |
779 | LIST_REMOVE(stop_when_bound_queue, u->manager->stop_when_bound_queue, u); | |
52ad194e | 780 | |
8b3d4ff0 | 781 | bpf_firewall_close(u); |
8a584da2 | 782 | |
8b3d4ff0 | 783 | hashmap_free(u->bpf_foreign_by_key); |
f2dec872 | 784 | |
ea0999c9 MB |
785 | bpf_program_free(u->bpf_device_control_installed); |
786 | ||
787 | #if BPF_FRAMEWORK | |
788 | bpf_link_free(u->restrict_ifaces_ingress_bpf_link); | |
789 | bpf_link_free(u->restrict_ifaces_egress_bpf_link); | |
790 | #endif | |
791 | fdset_free(u->initial_restric_ifaces_link_fds); | |
6e866b33 | 792 | |
98393f85 MB |
793 | condition_free_list(u->conditions); |
794 | condition_free_list(u->asserts); | |
60f067b4 | 795 | |
663996b3 MS |
796 | free(u->description); |
797 | strv_free(u->documentation); | |
798 | free(u->fragment_path); | |
799 | free(u->source_path); | |
800 | strv_free(u->dropin_paths); | |
801 | free(u->instance); | |
802 | ||
5eef597e | 803 | free(u->job_timeout_reboot_arg); |
4c89c718 MP |
804 | free(u->reboot_arg); |
805 | ||
086111aa LB |
806 | free(u->access_selinux_context); |
807 | ||
a10f5d05 MB |
808 | set_free_free(u->aliases); |
809 | free(u->id); | |
810 | ||
086111aa LB |
811 | activation_details_unref(u->activation_details); |
812 | ||
3a6ce677 | 813 | return mfree(u); |
663996b3 MS |
814 | } |
815 | ||
a10f5d05 MB |
816 | FreezerState unit_freezer_state(Unit *u) { |
817 | assert(u); | |
818 | ||
819 | return u->freezer_state; | |
820 | } | |
821 | ||
822 | int unit_freezer_state_kernel(Unit *u, FreezerState *ret) { | |
823 | char *values[1] = {}; | |
824 | int r; | |
825 | ||
826 | assert(u); | |
827 | ||
828 | r = cg_get_keyed_attribute(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "cgroup.events", | |
829 | STRV_MAKE("frozen"), values); | |
830 | if (r < 0) | |
831 | return r; | |
832 | ||
833 | r = _FREEZER_STATE_INVALID; | |
834 | ||
835 | if (values[0]) { | |
836 | if (streq(values[0], "0")) | |
837 | r = FREEZER_RUNNING; | |
838 | else if (streq(values[0], "1")) | |
839 | r = FREEZER_FROZEN; | |
840 | } | |
841 | ||
842 | free(values[0]); | |
843 | *ret = r; | |
844 | ||
845 | return 0; | |
846 | } | |
847 | ||
663996b3 MS |
848 | UnitActiveState unit_active_state(Unit *u) { |
849 | assert(u); | |
850 | ||
851 | if (u->load_state == UNIT_MERGED) | |
852 | return unit_active_state(unit_follow_merge(u)); | |
853 | ||
854 | /* After a reload it might happen that a unit is not correctly | |
855 | * loaded but still has a process around. That's why we won't | |
856 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ | |
857 | ||
858 | return UNIT_VTABLE(u)->active_state(u); | |
859 | } | |
860 | ||
861 | const char* unit_sub_state_to_string(Unit *u) { | |
862 | assert(u); | |
863 | ||
864 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
865 | } | |
866 | ||
8b3d4ff0 | 867 | static int unit_merge_names(Unit *u, Unit *other) { |
a10f5d05 | 868 | char *name; |
5eef597e | 869 | int r; |
663996b3 MS |
870 | |
871 | assert(u); | |
872 | assert(other); | |
873 | ||
a10f5d05 | 874 | r = unit_add_alias(u, other->id); |
5eef597e MP |
875 | if (r < 0) |
876 | return r; | |
663996b3 | 877 | |
a10f5d05 MB |
878 | r = set_move(u->aliases, other->aliases); |
879 | if (r < 0) { | |
880 | set_remove(u->aliases, other->id); | |
881 | return r; | |
882 | } | |
883 | ||
884 | TAKE_PTR(other->id); | |
885 | other->aliases = set_free_free(other->aliases); | |
663996b3 | 886 | |
a032b68d | 887 | SET_FOREACH(name, u->aliases) |
a10f5d05 | 888 | assert_se(hashmap_replace(u->manager->units, name, u) == 0); |
5eef597e MP |
889 | |
890 | return 0; | |
891 | } | |
892 | ||
8b3d4ff0 MB |
893 | static int unit_reserve_dependencies(Unit *u, Unit *other) { |
894 | size_t n_reserve; | |
895 | Hashmap* deps; | |
896 | void *d; | |
897 | int r; | |
5eef597e MP |
898 | |
899 | assert(u); | |
900 | assert(other); | |
5eef597e | 901 | |
8b3d4ff0 MB |
902 | /* Let's reserve some space in the dependency hashmaps so that later on merging the units cannot |
903 | * fail. | |
904 | * | |
905 | * First make some room in the per dependency type hashmaps. Using the summed size of both unit's | |
906 | * hashmaps is an estimate that is likely too high since they probably use some of the same | |
907 | * types. But it's never too low, and that's all we need. */ | |
908 | ||
909 | n_reserve = MIN(hashmap_size(other->dependencies), LESS_BY((size_t) _UNIT_DEPENDENCY_MAX, hashmap_size(u->dependencies))); | |
910 | if (n_reserve > 0) { | |
911 | r = hashmap_ensure_allocated(&u->dependencies, NULL); | |
912 | if (r < 0) | |
913 | return r; | |
914 | ||
915 | r = hashmap_reserve(u->dependencies, n_reserve); | |
916 | if (r < 0) | |
917 | return r; | |
918 | } | |
919 | ||
920 | /* Now, enlarge our per dependency type hashmaps by the number of entries in the same hashmap of the | |
921 | * other unit's dependencies. | |
922 | * | |
923 | * NB: If u does not have a dependency set allocated for some dependency type, there is no need to | |
924 | * reserve anything for. In that case other's set will be transferred as a whole to u by | |
925 | * complete_move(). */ | |
926 | ||
927 | HASHMAP_FOREACH_KEY(deps, d, u->dependencies) { | |
928 | Hashmap *other_deps; | |
929 | ||
930 | other_deps = hashmap_get(other->dependencies, d); | |
5eef597e | 931 | |
8b3d4ff0 MB |
932 | r = hashmap_reserve(deps, hashmap_size(other_deps)); |
933 | if (r < 0) | |
934 | return r; | |
935 | } | |
936 | ||
937 | return 0; | |
938 | } | |
939 | ||
a6810822 | 940 | static bool unit_should_warn_about_dependency(UnitDependency dependency) { |
8b3d4ff0 | 941 | /* Only warn about some unit types */ |
a6810822 LB |
942 | return IN_SET(dependency, |
943 | UNIT_CONFLICTS, | |
944 | UNIT_CONFLICTED_BY, | |
945 | UNIT_BEFORE, | |
946 | UNIT_AFTER, | |
947 | UNIT_ON_SUCCESS, | |
948 | UNIT_ON_FAILURE, | |
949 | UNIT_TRIGGERS, | |
950 | UNIT_TRIGGERED_BY); | |
663996b3 MS |
951 | } |
952 | ||
8b3d4ff0 MB |
953 | static int unit_per_dependency_type_hashmap_update( |
954 | Hashmap *per_type, | |
955 | Unit *other, | |
956 | UnitDependencyMask origin_mask, | |
957 | UnitDependencyMask destination_mask) { | |
958 | ||
959 | UnitDependencyInfo info; | |
663996b3 MS |
960 | int r; |
961 | ||
8b3d4ff0 MB |
962 | assert(other); |
963 | assert_cc(sizeof(void*) == sizeof(info)); | |
964 | ||
965 | /* Acquire the UnitDependencyInfo entry for the Unit* we are interested in, and update it if it | |
966 | * exists, or insert it anew if not. */ | |
967 | ||
968 | info.data = hashmap_get(per_type, other); | |
969 | if (info.data) { | |
970 | /* Entry already exists. Add in our mask. */ | |
971 | ||
972 | if (FLAGS_SET(origin_mask, info.origin_mask) && | |
973 | FLAGS_SET(destination_mask, info.destination_mask)) | |
974 | return 0; /* NOP */ | |
975 | ||
976 | info.origin_mask |= origin_mask; | |
977 | info.destination_mask |= destination_mask; | |
978 | ||
979 | r = hashmap_update(per_type, other, info.data); | |
980 | } else { | |
981 | info = (UnitDependencyInfo) { | |
982 | .origin_mask = origin_mask, | |
983 | .destination_mask = destination_mask, | |
984 | }; | |
985 | ||
986 | r = hashmap_put(per_type, other, info.data); | |
987 | } | |
988 | if (r < 0) | |
989 | return r; | |
990 | ||
991 | ||
992 | return 1; | |
993 | } | |
994 | ||
995 | static int unit_add_dependency_hashmap( | |
996 | Hashmap **dependencies, | |
997 | UnitDependency d, | |
998 | Unit *other, | |
999 | UnitDependencyMask origin_mask, | |
1000 | UnitDependencyMask destination_mask) { | |
1001 | ||
1002 | Hashmap *per_type; | |
1003 | int r; | |
1004 | ||
1005 | assert(dependencies); | |
1006 | assert(other); | |
1007 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
1008 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
1009 | assert(origin_mask > 0 || destination_mask > 0); | |
1010 | ||
1011 | /* Ensure the top-level dependency hashmap exists that maps UnitDependency → Hashmap(Unit* → | |
1012 | * UnitDependencyInfo) */ | |
1013 | r = hashmap_ensure_allocated(dependencies, NULL); | |
1014 | if (r < 0) | |
1015 | return r; | |
1016 | ||
1017 | /* Acquire the inner hashmap, that maps Unit* → UnitDependencyInfo, for the specified dependency | |
1018 | * type, and if it's missing allocate it and insert it. */ | |
1019 | per_type = hashmap_get(*dependencies, UNIT_DEPENDENCY_TO_PTR(d)); | |
1020 | if (!per_type) { | |
1021 | per_type = hashmap_new(NULL); | |
1022 | if (!per_type) | |
1023 | return -ENOMEM; | |
1024 | ||
1025 | r = hashmap_put(*dependencies, UNIT_DEPENDENCY_TO_PTR(d), per_type); | |
1026 | if (r < 0) { | |
1027 | hashmap_free(per_type); | |
1028 | return r; | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | return unit_per_dependency_type_hashmap_update(per_type, other, origin_mask, destination_mask); | |
1033 | } | |
1034 | ||
a6810822 LB |
1035 | static void unit_merge_dependencies(Unit *u, Unit *other) { |
1036 | Hashmap *deps; | |
1037 | void *dt; /* Actually of type UnitDependency, except that we don't bother casting it here, | |
1038 | * since the hashmaps all want it as void pointer. */ | |
52ad194e | 1039 | |
663996b3 MS |
1040 | assert(u); |
1041 | assert(other); | |
663996b3 | 1042 | |
8b3d4ff0 MB |
1043 | if (u == other) |
1044 | return; | |
1045 | ||
a6810822 LB |
1046 | /* First, remove dependency to other. */ |
1047 | HASHMAP_FOREACH_KEY(deps, dt, u->dependencies) { | |
1048 | if (hashmap_remove(deps, other) && unit_should_warn_about_dependency(UNIT_DEPENDENCY_FROM_PTR(dt))) | |
1049 | log_unit_warning(u, "Dependency %s=%s is dropped, as %s is merged into %s.", | |
1050 | unit_dependency_to_string(UNIT_DEPENDENCY_FROM_PTR(dt)), | |
1051 | other->id, other->id, u->id); | |
1052 | ||
1053 | if (hashmap_isempty(deps)) | |
1054 | hashmap_free(hashmap_remove(u->dependencies, dt)); | |
1055 | } | |
1056 | ||
8b3d4ff0 MB |
1057 | for (;;) { |
1058 | _cleanup_(hashmap_freep) Hashmap *other_deps = NULL; | |
1059 | UnitDependencyInfo di_back; | |
1060 | Unit *back; | |
8b3d4ff0 MB |
1061 | |
1062 | /* Let's focus on one dependency type at a time, that 'other' has defined. */ | |
1063 | other_deps = hashmap_steal_first_key_and_value(other->dependencies, &dt); | |
1064 | if (!other_deps) | |
1065 | break; /* done! */ | |
1066 | ||
a6810822 LB |
1067 | deps = hashmap_get(u->dependencies, dt); |
1068 | ||
8b3d4ff0 MB |
1069 | /* Now iterate through all dependencies of this dependency type, of 'other'. We refer to the |
1070 | * referenced units as 'back'. */ | |
1071 | HASHMAP_FOREACH_KEY(di_back.data, back, other_deps) { | |
1072 | Hashmap *back_deps; | |
1073 | void *back_dt; | |
52ad194e | 1074 | |
5eef597e | 1075 | if (back == u) { |
8b3d4ff0 MB |
1076 | /* This is a dependency pointing back to the unit we want to merge with? |
1077 | * Suppress it (but warn) */ | |
a6810822 LB |
1078 | if (unit_should_warn_about_dependency(UNIT_DEPENDENCY_FROM_PTR(dt))) |
1079 | log_unit_warning(u, "Dependency %s=%s in %s is dropped, as %s is merged into %s.", | |
1080 | unit_dependency_to_string(UNIT_DEPENDENCY_FROM_PTR(dt)), | |
1081 | u->id, other->id, other->id, u->id); | |
1082 | ||
1083 | hashmap_remove(other_deps, back); | |
8b3d4ff0 MB |
1084 | continue; |
1085 | } | |
1086 | ||
1087 | /* Now iterate through all deps of 'back', and fix the ones pointing to 'other' to | |
1088 | * point to 'u' instead. */ | |
1089 | HASHMAP_FOREACH_KEY(back_deps, back_dt, back->dependencies) { | |
1090 | UnitDependencyInfo di_move; | |
1091 | ||
1092 | di_move.data = hashmap_remove(back_deps, other); | |
1093 | if (!di_move.data) | |
1094 | continue; | |
52ad194e | 1095 | |
8b3d4ff0 MB |
1096 | assert_se(unit_per_dependency_type_hashmap_update( |
1097 | back_deps, | |
1098 | u, | |
1099 | di_move.origin_mask, | |
1100 | di_move.destination_mask) >= 0); | |
1101 | } | |
52ad194e | 1102 | |
8b3d4ff0 | 1103 | /* The target unit already has dependencies of this type, let's then merge this individually. */ |
a6810822 LB |
1104 | if (deps) |
1105 | assert_se(unit_per_dependency_type_hashmap_update( | |
1106 | deps, | |
1107 | back, | |
1108 | di_back.origin_mask, | |
1109 | di_back.destination_mask) >= 0); | |
8b3d4ff0 | 1110 | } |
a6810822 LB |
1111 | |
1112 | /* Now all references towards 'other' of the current type 'dt' are corrected to point to 'u'. | |
1113 | * Lets's now move the deps of type 'dt' from 'other' to 'u'. If the unit does not have | |
1114 | * dependencies of this type, let's move them per type wholesale. */ | |
1115 | if (!deps) | |
1116 | assert_se(hashmap_put(u->dependencies, dt, TAKE_PTR(other_deps)) >= 0); | |
8b3d4ff0 | 1117 | } |
663996b3 | 1118 | |
8b3d4ff0 | 1119 | other->dependencies = hashmap_free(other->dependencies); |
663996b3 MS |
1120 | } |
1121 | ||
1122 | int unit_merge(Unit *u, Unit *other) { | |
5eef597e | 1123 | int r; |
663996b3 MS |
1124 | |
1125 | assert(u); | |
1126 | assert(other); | |
1127 | assert(u->manager == other->manager); | |
1128 | assert(u->type != _UNIT_TYPE_INVALID); | |
1129 | ||
1130 | other = unit_follow_merge(other); | |
1131 | ||
1132 | if (other == u) | |
1133 | return 0; | |
1134 | ||
1135 | if (u->type != other->type) | |
1136 | return -EINVAL; | |
1137 | ||
aa27b158 MP |
1138 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
1139 | return -EEXIST; | |
1140 | ||
f5e65279 | 1141 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
663996b3 MS |
1142 | return -EEXIST; |
1143 | ||
a10f5d05 MB |
1144 | if (!streq_ptr(u->instance, other->instance)) |
1145 | return -EINVAL; | |
1146 | ||
663996b3 MS |
1147 | if (other->job) |
1148 | return -EEXIST; | |
1149 | ||
1150 | if (other->nop_job) | |
1151 | return -EEXIST; | |
1152 | ||
1153 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1154 | return -EEXIST; | |
1155 | ||
8b3d4ff0 MB |
1156 | /* Make reservations to ensure merge_dependencies() won't fail. We don't rollback reservations if we |
1157 | * fail. We don't have a way to undo reservations. A reservation is not a leak. */ | |
1158 | r = unit_reserve_dependencies(u, other); | |
1159 | if (r < 0) | |
1160 | return r; | |
5eef597e | 1161 | |
663996b3 | 1162 | /* Redirect all references */ |
98393f85 MB |
1163 | while (other->refs_by_target) |
1164 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
663996b3 MS |
1165 | |
1166 | /* Merge dependencies */ | |
8b3d4ff0 | 1167 | unit_merge_dependencies(u, other); |
663996b3 | 1168 | |
a6810822 LB |
1169 | /* Merge names. It is better to do that after merging deps, otherwise the log message contains n/a. */ |
1170 | r = unit_merge_names(u, other); | |
1171 | if (r < 0) | |
1172 | return r; | |
1173 | ||
663996b3 MS |
1174 | other->load_state = UNIT_MERGED; |
1175 | other->merged_into = u; | |
1176 | ||
086111aa LB |
1177 | if (!u->activation_details) |
1178 | u->activation_details = activation_details_ref(other->activation_details); | |
1179 | ||
663996b3 MS |
1180 | /* If there is still some data attached to the other node, we |
1181 | * don't need it anymore, and can free it. */ | |
1182 | if (other->load_state != UNIT_STUB) | |
1183 | if (UNIT_VTABLE(other)->done) | |
1184 | UNIT_VTABLE(other)->done(other); | |
1185 | ||
1186 | unit_add_to_dbus_queue(u); | |
1187 | unit_add_to_cleanup_queue(other); | |
1188 | ||
1189 | return 0; | |
1190 | } | |
1191 | ||
1192 | int unit_merge_by_name(Unit *u, const char *name) { | |
aa27b158 | 1193 | _cleanup_free_ char *s = NULL; |
663996b3 MS |
1194 | Unit *other; |
1195 | int r; | |
663996b3 | 1196 | |
f2dec872 BR |
1197 | /* Either add name to u, or if a unit with name already exists, merge it with u. |
1198 | * If name is a template, do the same for name@instance, where instance is u's instance. */ | |
1199 | ||
663996b3 MS |
1200 | assert(u); |
1201 | assert(name); | |
1202 | ||
e3bff60a | 1203 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
663996b3 MS |
1204 | if (!u->instance) |
1205 | return -EINVAL; | |
1206 | ||
e3bff60a MP |
1207 | r = unit_name_replace_instance(name, u->instance, &s); |
1208 | if (r < 0) | |
1209 | return r; | |
663996b3 MS |
1210 | |
1211 | name = s; | |
1212 | } | |
1213 | ||
14228c0d | 1214 | other = manager_get_unit(u->manager, name); |
e3bff60a MP |
1215 | if (other) |
1216 | return unit_merge(u, other); | |
663996b3 | 1217 | |
e3bff60a | 1218 | return unit_add_name(u, name); |
663996b3 MS |
1219 | } |
1220 | ||
1221 | Unit* unit_follow_merge(Unit *u) { | |
1222 | assert(u); | |
1223 | ||
1224 | while (u->load_state == UNIT_MERGED) | |
1225 | assert_se(u = u->merged_into); | |
1226 | ||
1227 | return u; | |
1228 | } | |
1229 | ||
1230 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
1231 | int r; | |
1232 | ||
1233 | assert(u); | |
1234 | assert(c); | |
1235 | ||
086111aa LB |
1236 | /* Unlike unit_add_dependency() or friends, this always returns 0 on success. */ |
1237 | ||
6e866b33 | 1238 | if (c->working_directory && !c->working_directory_missing_ok) { |
52ad194e | 1239 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
60f067b4 JS |
1240 | if (r < 0) |
1241 | return r; | |
1242 | } | |
1243 | ||
1244 | if (c->root_directory) { | |
52ad194e | 1245 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
60f067b4 JS |
1246 | if (r < 0) |
1247 | return r; | |
1248 | } | |
1249 | ||
2897b343 | 1250 | if (c->root_image) { |
52ad194e | 1251 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
2897b343 MP |
1252 | if (r < 0) |
1253 | return r; | |
1254 | } | |
1255 | ||
a032b68d | 1256 | for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
f5e65279 MB |
1257 | if (!u->manager->prefix[dt]) |
1258 | continue; | |
1259 | ||
ea0999c9 | 1260 | for (size_t i = 0; i < c->directories[dt].n_items; i++) { |
5b5a102a | 1261 | _cleanup_free_ char *p = NULL; |
f5e65279 | 1262 | |
ea0999c9 | 1263 | p = path_join(u->manager->prefix[dt], c->directories[dt].items[i].path); |
f5e65279 MB |
1264 | if (!p) |
1265 | return -ENOMEM; | |
1266 | ||
52ad194e | 1267 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
f5e65279 MB |
1268 | if (r < 0) |
1269 | return r; | |
1270 | } | |
1271 | } | |
1272 | ||
aa27b158 | 1273 | if (!MANAGER_IS_SYSTEM(u->manager)) |
60f067b4 JS |
1274 | return 0; |
1275 | ||
a10f5d05 MB |
1276 | /* For the following three directory types we need write access, and /var/ is possibly on the root |
1277 | * fs. Hence order after systemd-remount-fs.service, to ensure things are writable. */ | |
ea0999c9 MB |
1278 | if (c->directories[EXEC_DIRECTORY_STATE].n_items > 0 || |
1279 | c->directories[EXEC_DIRECTORY_CACHE].n_items > 0 || | |
1280 | c->directories[EXEC_DIRECTORY_LOGS].n_items > 0) { | |
a10f5d05 MB |
1281 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, true, UNIT_DEPENDENCY_FILE); |
1282 | if (r < 0) | |
1283 | return r; | |
1284 | } | |
1285 | ||
60f067b4 | 1286 | if (c->private_tmp) { |
60f067b4 | 1287 | |
8b3d4ff0 MB |
1288 | /* FIXME: for now we make a special case for /tmp and add a weak dependency on |
1289 | * tmp.mount so /tmp being masked is supported. However there's no reason to treat | |
1290 | * /tmp specifically and masking other mount units should be handled more | |
1291 | * gracefully too, see PR#16894. */ | |
1292 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "tmp.mount", true, UNIT_DEPENDENCY_FILE); | |
1293 | if (r < 0) | |
1294 | return r; | |
1295 | ||
1296 | r = unit_require_mounts_for(u, "/var/tmp", UNIT_DEPENDENCY_FILE); | |
1297 | if (r < 0) | |
1298 | return r; | |
2897b343 | 1299 | |
6e866b33 | 1300 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, true, UNIT_DEPENDENCY_FILE); |
60f067b4 JS |
1301 | if (r < 0) |
1302 | return r; | |
1303 | } | |
1304 | ||
a10f5d05 MB |
1305 | if (c->root_image) { |
1306 | /* We need to wait for /dev/loopX to appear when doing RootImage=, hence let's add an | |
1307 | * implicit dependency on udev */ | |
1308 | ||
1309 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_UDEVD_SERVICE, true, UNIT_DEPENDENCY_FILE); | |
1310 | if (r < 0) | |
1311 | return r; | |
1312 | } | |
1313 | ||
8a584da2 MP |
1314 | if (!IN_SET(c->std_output, |
1315 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
a10f5d05 | 1316 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
8a584da2 MP |
1317 | !IN_SET(c->std_error, |
1318 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
a10f5d05 | 1319 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
46cdbd49 | 1320 | !c->log_namespace) |
663996b3 MS |
1321 | return 0; |
1322 | ||
46cdbd49 BR |
1323 | /* If syslog or kernel logging is requested (or log namespacing is), make sure our own logging daemon |
1324 | * is run first. */ | |
1325 | ||
1326 | if (c->log_namespace) { | |
1327 | _cleanup_free_ char *socket_unit = NULL, *varlink_socket_unit = NULL; | |
1328 | ||
1329 | r = unit_name_build_from_type("systemd-journald", c->log_namespace, UNIT_SOCKET, &socket_unit); | |
1330 | if (r < 0) | |
1331 | return r; | |
1332 | ||
1333 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, socket_unit, true, UNIT_DEPENDENCY_FILE); | |
1334 | if (r < 0) | |
1335 | return r; | |
1336 | ||
1337 | r = unit_name_build_from_type("systemd-journald-varlink", c->log_namespace, UNIT_SOCKET, &varlink_socket_unit); | |
1338 | if (r < 0) | |
1339 | return r; | |
663996b3 | 1340 | |
46cdbd49 BR |
1341 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, varlink_socket_unit, true, UNIT_DEPENDENCY_FILE); |
1342 | if (r < 0) | |
1343 | return r; | |
1344 | } else | |
1345 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, true, UNIT_DEPENDENCY_FILE); | |
60f067b4 JS |
1346 | if (r < 0) |
1347 | return r; | |
663996b3 MS |
1348 | |
1349 | return 0; | |
1350 | } | |
1351 | ||
67bbd050 | 1352 | const char* unit_description(Unit *u) { |
663996b3 MS |
1353 | assert(u); |
1354 | ||
1355 | if (u->description) | |
1356 | return u->description; | |
1357 | ||
1358 | return strna(u->id); | |
1359 | } | |
1360 | ||
67bbd050 | 1361 | const char* unit_status_string(Unit *u, char **ret_combined_buffer) { |
f2dec872 | 1362 | assert(u); |
67bbd050 | 1363 | assert(u->id); |
f2dec872 | 1364 | |
67bbd050 MB |
1365 | /* Return u->id, u->description, or "{u->id} - {u->description}". |
1366 | * Versions with u->description are only used if it is set. | |
1367 | * The last option is used if configured and the caller provided the 'ret_combined_buffer' | |
1368 | * pointer. | |
1369 | * | |
1370 | * Note that *ret_combined_buffer may be set to NULL. */ | |
1371 | ||
1372 | if (!u->description || | |
1373 | u->manager->status_unit_format == STATUS_UNIT_FORMAT_NAME || | |
1374 | (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED && !ret_combined_buffer) || | |
1375 | streq(u->description, u->id)) { | |
1376 | ||
1377 | if (ret_combined_buffer) | |
1378 | *ret_combined_buffer = NULL; | |
f2dec872 | 1379 | return u->id; |
67bbd050 MB |
1380 | } |
1381 | ||
1382 | if (ret_combined_buffer) { | |
1383 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED) { | |
1384 | *ret_combined_buffer = strjoin(u->id, " - ", u->description); | |
1385 | if (*ret_combined_buffer) | |
1386 | return *ret_combined_buffer; | |
1387 | log_oom(); /* Fall back to ->description */ | |
1388 | } else | |
1389 | *ret_combined_buffer = NULL; | |
1390 | } | |
f2dec872 | 1391 | |
67bbd050 | 1392 | return u->description; |
f2dec872 BR |
1393 | } |
1394 | ||
663996b3 | 1395 | /* Common implementation for multiple backends */ |
e1f67bc7 | 1396 | int unit_load_fragment_and_dropin(Unit *u, bool fragment_required) { |
663996b3 MS |
1397 | int r; |
1398 | ||
1399 | assert(u); | |
1400 | ||
60f067b4 | 1401 | /* Load a .{service,socket,...} file */ |
14228c0d MB |
1402 | r = unit_load_fragment(u); |
1403 | if (r < 0) | |
663996b3 MS |
1404 | return r; |
1405 | ||
e1f67bc7 MB |
1406 | if (u->load_state == UNIT_STUB) { |
1407 | if (fragment_required) | |
1408 | return -ENOENT; | |
1409 | ||
1410 | u->load_state = UNIT_LOADED; | |
1411 | } | |
663996b3 | 1412 | |
f5e65279 MB |
1413 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1414 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1415 | * been loaded and which not, at least without doing complicated book-keeping, | |
1416 | * so let's always reread all drop-ins. */ | |
478ed938 MB |
1417 | r = unit_load_dropin(unit_follow_merge(u)); |
1418 | if (r < 0) | |
1419 | return r; | |
1420 | ||
1421 | if (u->source_path) { | |
1422 | struct stat st; | |
1423 | ||
1424 | if (stat(u->source_path, &st) >= 0) | |
1425 | u->source_mtime = timespec_load(&st.st_mtim); | |
1426 | else | |
1427 | u->source_mtime = 0; | |
1428 | } | |
1429 | ||
1430 | return 0; | |
663996b3 MS |
1431 | } |
1432 | ||
b012e921 | 1433 | void unit_add_to_target_deps_queue(Unit *u) { |
086111aa | 1434 | Manager *m = ASSERT_PTR(ASSERT_PTR(u)->manager); |
b012e921 MB |
1435 | |
1436 | if (u->in_target_deps_queue) | |
1437 | return; | |
1438 | ||
1439 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1440 | u->in_target_deps_queue = true; | |
1441 | } | |
1442 | ||
663996b3 MS |
1443 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
1444 | assert(u); | |
1445 | assert(target); | |
1446 | ||
1447 | if (target->type != UNIT_TARGET) | |
1448 | return 0; | |
1449 | ||
1450 | /* Only add the dependency if both units are loaded, so that | |
1451 | * that loop check below is reliable */ | |
1452 | if (u->load_state != UNIT_LOADED || | |
1453 | target->load_state != UNIT_LOADED) | |
1454 | return 0; | |
1455 | ||
1456 | /* If either side wants no automatic dependencies, then let's | |
1457 | * skip this */ | |
1458 | if (!u->default_dependencies || | |
1459 | !target->default_dependencies) | |
1460 | return 0; | |
1461 | ||
1462 | /* Don't create loops */ | |
8b3d4ff0 | 1463 | if (unit_has_dependency(target, UNIT_ATOM_BEFORE, u)) |
663996b3 MS |
1464 | return 0; |
1465 | ||
52ad194e | 1466 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
663996b3 MS |
1467 | } |
1468 | ||
60f067b4 | 1469 | static int unit_add_slice_dependencies(Unit *u) { |
8b3d4ff0 | 1470 | Unit *slice; |
60f067b4 JS |
1471 | assert(u); |
1472 | ||
d9dfd233 | 1473 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
60f067b4 JS |
1474 | return 0; |
1475 | ||
52ad194e MB |
1476 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1477 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1478 | relationship). */ | |
a10f5d05 | 1479 | UnitDependencyMask mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; |
52ad194e | 1480 | |
8b3d4ff0 MB |
1481 | slice = UNIT_GET_SLICE(u); |
1482 | if (slice) | |
1483 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, slice, true, mask); | |
60f067b4 | 1484 | |
6300502b | 1485 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
5eef597e MP |
1486 | return 0; |
1487 | ||
6e866b33 | 1488 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, true, mask); |
60f067b4 JS |
1489 | } |
1490 | ||
1491 | static int unit_add_mount_dependencies(Unit *u) { | |
52ad194e MB |
1492 | UnitDependencyInfo di; |
1493 | const char *path; | |
086111aa | 1494 | bool changed = false; |
60f067b4 JS |
1495 | int r; |
1496 | ||
1497 | assert(u); | |
1498 | ||
a032b68d | 1499 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for) { |
52ad194e | 1500 | char prefix[strlen(path) + 1]; |
60f067b4 | 1501 | |
52ad194e | 1502 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
db2df898 | 1503 | _cleanup_free_ char *p = NULL; |
60f067b4 JS |
1504 | Unit *m; |
1505 | ||
db2df898 | 1506 | r = unit_name_from_path(prefix, ".mount", &p); |
086111aa | 1507 | if (r == -EINVAL) |
8b3d4ff0 MB |
1508 | continue; /* If the path cannot be converted to a mount unit name, then it's |
1509 | * not manageable as a unit by systemd, and hence we don't need a | |
1510 | * dependency on it. Let's thus silently ignore the issue. */ | |
60f067b4 JS |
1511 | if (r < 0) |
1512 | return r; | |
db2df898 MP |
1513 | |
1514 | m = manager_get_unit(u->manager, p); | |
1515 | if (!m) { | |
8b3d4ff0 MB |
1516 | /* Make sure to load the mount unit if it exists. If so the dependencies on |
1517 | * this unit will be added later during the loading of the mount unit. */ | |
db2df898 | 1518 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); |
60f067b4 | 1519 | continue; |
db2df898 | 1520 | } |
60f067b4 JS |
1521 | if (m == u) |
1522 | continue; | |
1523 | ||
1524 | if (m->load_state != UNIT_LOADED) | |
1525 | continue; | |
1526 | ||
52ad194e | 1527 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
60f067b4 JS |
1528 | if (r < 0) |
1529 | return r; | |
086111aa | 1530 | changed = changed || r > 0; |
60f067b4 JS |
1531 | |
1532 | if (m->fragment_path) { | |
52ad194e | 1533 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
60f067b4 JS |
1534 | if (r < 0) |
1535 | return r; | |
086111aa | 1536 | changed = changed || r > 0; |
60f067b4 JS |
1537 | } |
1538 | } | |
14228c0d | 1539 | } |
663996b3 | 1540 | |
086111aa | 1541 | return changed; |
663996b3 MS |
1542 | } |
1543 | ||
a032b68d MB |
1544 | static int unit_add_oomd_dependencies(Unit *u) { |
1545 | CGroupContext *c; | |
1546 | bool wants_oomd; | |
a032b68d MB |
1547 | |
1548 | assert(u); | |
1549 | ||
1550 | if (!u->default_dependencies) | |
1551 | return 0; | |
1552 | ||
1553 | c = unit_get_cgroup_context(u); | |
1554 | if (!c) | |
1555 | return 0; | |
1556 | ||
1557 | wants_oomd = (c->moom_swap == MANAGED_OOM_KILL || c->moom_mem_pressure == MANAGED_OOM_KILL); | |
1558 | if (!wants_oomd) | |
1559 | return 0; | |
1560 | ||
086111aa | 1561 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "systemd-oomd.service", true, UNIT_DEPENDENCY_FILE); |
a032b68d MB |
1562 | } |
1563 | ||
60f067b4 | 1564 | static int unit_add_startup_units(Unit *u) { |
ea0999c9 | 1565 | if (!unit_has_startup_cgroup_constraints(u)) |
60f067b4 JS |
1566 | return 0; |
1567 | ||
a10f5d05 | 1568 | return set_ensure_put(&u->manager->startup_units, NULL, u); |
60f067b4 JS |
1569 | } |
1570 | ||
8b3d4ff0 MB |
1571 | static int unit_validate_on_failure_job_mode( |
1572 | Unit *u, | |
1573 | const char *job_mode_setting, | |
1574 | JobMode job_mode, | |
1575 | const char *dependency_name, | |
1576 | UnitDependencyAtom atom) { | |
1577 | ||
1578 | Unit *other, *found = NULL; | |
1579 | ||
1580 | if (job_mode != JOB_ISOLATE) | |
1581 | return 0; | |
1582 | ||
1583 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
1584 | if (!found) | |
1585 | found = other; | |
1586 | else if (found != other) | |
1587 | return log_unit_error_errno( | |
1588 | u, SYNTHETIC_ERRNO(ENOEXEC), | |
1589 | "More than one %s dependencies specified but %sisolate set. Refusing.", | |
1590 | dependency_name, job_mode_setting); | |
1591 | } | |
1592 | ||
1593 | return 0; | |
1594 | } | |
1595 | ||
663996b3 MS |
1596 | int unit_load(Unit *u) { |
1597 | int r; | |
1598 | ||
1599 | assert(u); | |
1600 | ||
1601 | if (u->in_load_queue) { | |
60f067b4 | 1602 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
663996b3 MS |
1603 | u->in_load_queue = false; |
1604 | } | |
1605 | ||
1606 | if (u->type == _UNIT_TYPE_INVALID) | |
1607 | return -EINVAL; | |
1608 | ||
1609 | if (u->load_state != UNIT_STUB) | |
1610 | return 0; | |
1611 | ||
aa27b158 | 1612 | if (u->transient_file) { |
6e866b33 MB |
1613 | /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup |
1614 | * is complete, hence let's synchronize the unit file we just wrote to disk. */ | |
1615 | ||
aa27b158 MP |
1616 | r = fflush_and_check(u->transient_file); |
1617 | if (r < 0) | |
1618 | goto fail; | |
1619 | ||
52ad194e | 1620 | u->transient_file = safe_fclose(u->transient_file); |
aa27b158 MP |
1621 | u->fragment_mtime = now(CLOCK_REALTIME); |
1622 | } | |
1623 | ||
e1f67bc7 MB |
1624 | r = UNIT_VTABLE(u)->load(u); |
1625 | if (r < 0) | |
663996b3 | 1626 | goto fail; |
e1f67bc7 MB |
1627 | |
1628 | assert(u->load_state != UNIT_STUB); | |
663996b3 | 1629 | |
663996b3 | 1630 | if (u->load_state == UNIT_LOADED) { |
b012e921 | 1631 | unit_add_to_target_deps_queue(u); |
14228c0d | 1632 | |
60f067b4 | 1633 | r = unit_add_slice_dependencies(u); |
663996b3 | 1634 | if (r < 0) |
14228c0d | 1635 | goto fail; |
663996b3 | 1636 | |
60f067b4 JS |
1637 | r = unit_add_mount_dependencies(u); |
1638 | if (r < 0) | |
1639 | goto fail; | |
663996b3 | 1640 | |
a032b68d MB |
1641 | r = unit_add_oomd_dependencies(u); |
1642 | if (r < 0) | |
1643 | goto fail; | |
1644 | ||
60f067b4 JS |
1645 | r = unit_add_startup_units(u); |
1646 | if (r < 0) | |
1647 | goto fail; | |
663996b3 | 1648 | |
8b3d4ff0 MB |
1649 | r = unit_validate_on_failure_job_mode(u, "OnSuccessJobMode=", u->on_success_job_mode, "OnSuccess=", UNIT_ATOM_ON_SUCCESS); |
1650 | if (r < 0) | |
1651 | goto fail; | |
1652 | ||
1653 | r = unit_validate_on_failure_job_mode(u, "OnFailureJobMode=", u->on_failure_job_mode, "OnFailure=", UNIT_ATOM_ON_FAILURE); | |
1654 | if (r < 0) | |
14228c0d | 1655 | goto fail; |
60f067b4 | 1656 | |
81c58355 MB |
1657 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1658 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1659 | ||
6e866b33 MB |
1660 | /* We finished loading, let's ensure our parents recalculate the members mask */ |
1661 | unit_invalidate_cgroup_members_masks(u); | |
663996b3 MS |
1662 | } |
1663 | ||
1664 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); | |
1665 | ||
1666 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
1667 | unit_add_to_gc_queue(u); | |
a032b68d | 1668 | (void) manager_varlink_send_managed_oom_update(u); |
663996b3 MS |
1669 | |
1670 | return 0; | |
1671 | ||
1672 | fail: | |
129ef395 MB |
1673 | /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code |
1674 | * should hence return ENOEXEC to ensure units are placed in this state after loading. */ | |
b012e921 MB |
1675 | |
1676 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : | |
1677 | r == -ENOEXEC ? UNIT_BAD_SETTING : | |
1678 | UNIT_ERROR; | |
663996b3 | 1679 | u->load_error = r; |
b012e921 | 1680 | |
129ef395 MB |
1681 | /* Record the timestamp on the cache, so that if the cache gets updated between now and the next time |
1682 | * an attempt is made to load this unit, we know we need to check again. */ | |
a10f5d05 | 1683 | if (u->load_state == UNIT_NOT_FOUND) |
129ef395 | 1684 | u->fragment_not_found_timestamp_hash = u->manager->unit_cache_timestamp_hash; |
a10f5d05 | 1685 | |
663996b3 MS |
1686 | unit_add_to_dbus_queue(u); |
1687 | unit_add_to_gc_queue(u); | |
1688 | ||
b012e921 | 1689 | return log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
663996b3 MS |
1690 | } |
1691 | ||
bb4f798a MB |
1692 | _printf_(7, 8) |
1693 | static int log_unit_internal(void *userdata, int level, int error, const char *file, int line, const char *func, const char *format, ...) { | |
1694 | Unit *u = userdata; | |
1695 | va_list ap; | |
1696 | int r; | |
f47781d8 | 1697 | |
5b5a102a MB |
1698 | if (u && !unit_log_level_test(u, level)) |
1699 | return -ERRNO_VALUE(error); | |
1700 | ||
bb4f798a MB |
1701 | va_start(ap, format); |
1702 | if (u) | |
1703 | r = log_object_internalv(level, error, file, line, func, | |
1704 | u->manager->unit_log_field, | |
1705 | u->id, | |
1706 | u->manager->invocation_log_field, | |
1707 | u->invocation_id_string, | |
1708 | format, ap); | |
1709 | else | |
1710 | r = log_internalv(level, error, file, line, func, format, ap); | |
1711 | va_end(ap); | |
f47781d8 | 1712 | |
bb4f798a | 1713 | return r; |
f47781d8 MP |
1714 | } |
1715 | ||
bb4f798a | 1716 | static bool unit_test_condition(Unit *u) { |
a10f5d05 MB |
1717 | _cleanup_strv_free_ char **env = NULL; |
1718 | int r; | |
1719 | ||
663996b3 MS |
1720 | assert(u); |
1721 | ||
1722 | dual_timestamp_get(&u->condition_timestamp); | |
663996b3 | 1723 | |
a10f5d05 MB |
1724 | r = manager_get_effective_environment(u->manager, &env); |
1725 | if (r < 0) { | |
1726 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
ea0999c9 | 1727 | u->condition_result = true; |
a10f5d05 MB |
1728 | } else |
1729 | u->condition_result = condition_test_list( | |
1730 | u->conditions, | |
1731 | env, | |
1732 | condition_type_to_string, | |
1733 | log_unit_internal, | |
1734 | u); | |
6e866b33 | 1735 | |
a10f5d05 | 1736 | unit_add_to_dbus_queue(u); |
663996b3 MS |
1737 | return u->condition_result; |
1738 | } | |
1739 | ||
bb4f798a | 1740 | static bool unit_test_assert(Unit *u) { |
a10f5d05 MB |
1741 | _cleanup_strv_free_ char **env = NULL; |
1742 | int r; | |
1743 | ||
f47781d8 MP |
1744 | assert(u); |
1745 | ||
1746 | dual_timestamp_get(&u->assert_timestamp); | |
f47781d8 | 1747 | |
a10f5d05 MB |
1748 | r = manager_get_effective_environment(u->manager, &env); |
1749 | if (r < 0) { | |
1750 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
1751 | u->assert_result = CONDITION_ERROR; | |
1752 | } else | |
1753 | u->assert_result = condition_test_list( | |
1754 | u->asserts, | |
1755 | env, | |
1756 | assert_type_to_string, | |
1757 | log_unit_internal, | |
1758 | u); | |
6e866b33 | 1759 | |
a10f5d05 | 1760 | unit_add_to_dbus_queue(u); |
f47781d8 MP |
1761 | return u->assert_result; |
1762 | } | |
1763 | ||
67bbd050 MB |
1764 | void unit_status_printf(Unit *u, StatusType status_type, const char *status, const char *format, const char *ident) { |
1765 | if (log_get_show_color()) { | |
1766 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED && strchr(ident, ' ')) | |
1767 | ident = strjoina(ANSI_HIGHLIGHT, u->id, ANSI_NORMAL, " - ", u->description); | |
1768 | else | |
1769 | ident = strjoina(ANSI_HIGHLIGHT, ident, ANSI_NORMAL); | |
1770 | } | |
663996b3 | 1771 | |
60f067b4 | 1772 | DISABLE_WARNING_FORMAT_NONLITERAL; |
67bbd050 | 1773 | manager_status_printf(u->manager, status_type, status, format, ident); |
60f067b4 | 1774 | REENABLE_WARNING; |
663996b3 MS |
1775 | } |
1776 | ||
bb4f798a | 1777 | int unit_test_start_limit(Unit *u) { |
6e866b33 MB |
1778 | const char *reason; |
1779 | ||
4c89c718 MP |
1780 | assert(u); |
1781 | ||
e1f67bc7 | 1782 | if (ratelimit_below(&u->start_ratelimit)) { |
4c89c718 MP |
1783 | u->start_limit_hit = false; |
1784 | return 0; | |
1785 | } | |
1786 | ||
1787 | log_unit_warning(u, "Start request repeated too quickly."); | |
1788 | u->start_limit_hit = true; | |
1789 | ||
6e866b33 MB |
1790 | reason = strjoina("unit ", u->id, " failed"); |
1791 | ||
bb4f798a MB |
1792 | emergency_action(u->manager, u->start_limit_action, |
1793 | EMERGENCY_ACTION_IS_WATCHDOG|EMERGENCY_ACTION_WARN, | |
1794 | u->reboot_arg, -1, reason); | |
1795 | ||
1796 | return -ECANCELED; | |
4c89c718 MP |
1797 | } |
1798 | ||
2897b343 MP |
1799 | bool unit_shall_confirm_spawn(Unit *u) { |
1800 | assert(u); | |
1801 | ||
1802 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1803 | return false; | |
1804 | ||
1805 | /* For some reasons units remaining in the same process group | |
1806 | * as PID 1 fail to acquire the console even if it's not used | |
1807 | * by any process. So skip the confirmation question for them. */ | |
1808 | return !unit_get_exec_context(u)->same_pgrp; | |
1809 | } | |
1810 | ||
1811 | static bool unit_verify_deps(Unit *u) { | |
1812 | Unit *other; | |
2897b343 MP |
1813 | |
1814 | assert(u); | |
1815 | ||
8b3d4ff0 MB |
1816 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined |
1817 | * with After=. We do not check Requires= or Requisite= here as they only should have an effect on | |
1818 | * the job processing, but do not have any effect afterwards. We don't check BindsTo= dependencies | |
1819 | * that are not used in conjunction with After= as for them any such check would make things entirely | |
1820 | * racy. */ | |
2897b343 | 1821 | |
8b3d4ff0 | 1822 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { |
2897b343 | 1823 | |
8b3d4ff0 | 1824 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other)) |
2897b343 MP |
1825 | continue; |
1826 | ||
1827 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1828 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1829 | return false; | |
1830 | } | |
1831 | } | |
1832 | ||
1833 | return true; | |
1834 | } | |
1835 | ||
bb4f798a | 1836 | /* Errors that aren't really errors: |
4c89c718 | 1837 | * -EALREADY: Unit is already started. |
bb4f798a | 1838 | * -ECOMM: Condition failed |
4c89c718 | 1839 | * -EAGAIN: An operation is already in progress. Retry later. |
bb4f798a MB |
1840 | * |
1841 | * Errors that are real errors: | |
1842 | * -EBADR: This unit type does not support starting. | |
1843 | * -ECANCELED: Start limit hit, too many requests for now | |
4c89c718 MP |
1844 | * -EPROTO: Assert failed |
1845 | * -EINVAL: Unit not loaded | |
1846 | * -EOPNOTSUPP: Unit type not supported | |
2897b343 | 1847 | * -ENOLINK: The necessary dependencies are not fulfilled. |
b012e921 | 1848 | * -ESTALE: This unit has been started before and can't be started a second time |
bb4f798a | 1849 | * -ENOENT: This is a triggering unit and unit to trigger is not loaded |
663996b3 | 1850 | */ |
086111aa | 1851 | int unit_start(Unit *u, ActivationDetails *details) { |
663996b3 MS |
1852 | UnitActiveState state; |
1853 | Unit *following; | |
ea0999c9 | 1854 | int r; |
663996b3 MS |
1855 | |
1856 | assert(u); | |
1857 | ||
086111aa LB |
1858 | /* Let's hold off running start jobs for mount units when /proc/self/mountinfo monitor is rate limited. */ |
1859 | if (u->type == UNIT_MOUNT && sd_event_source_is_ratelimited(u->manager->mount_event_source)) | |
1860 | return -EAGAIN; | |
1861 | ||
bb4f798a MB |
1862 | /* If this is already started, then this will succeed. Note that this will even succeed if this unit |
1863 | * is not startable by the user. This is relied on to detect when we need to wait for units and when | |
1864 | * waiting is finished. */ | |
663996b3 MS |
1865 | state = unit_active_state(u); |
1866 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1867 | return -EALREADY; | |
f2dec872 BR |
1868 | if (state == UNIT_MAINTENANCE) |
1869 | return -EAGAIN; | |
663996b3 | 1870 | |
4c89c718 MP |
1871 | /* Units that aren't loaded cannot be started */ |
1872 | if (u->load_state != UNIT_LOADED) | |
1873 | return -EINVAL; | |
1874 | ||
b012e921 MB |
1875 | /* Refuse starting scope units more than once */ |
1876 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1877 | return -ESTALE; | |
1878 | ||
bb4f798a MB |
1879 | /* If the conditions failed, don't do anything at all. If we already are activating this call might |
1880 | * still be useful to speed up activation in case there is some hold-off time, but we don't want to | |
1881 | * recheck the condition in that case. */ | |
663996b3 | 1882 | if (state != UNIT_ACTIVATING && |
812752cc | 1883 | !unit_test_condition(u)) |
bb4f798a | 1884 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(ECOMM), "Starting requested but condition failed. Not starting unit."); |
663996b3 | 1885 | |
f47781d8 MP |
1886 | /* If the asserts failed, fail the entire job */ |
1887 | if (state != UNIT_ACTIVATING && | |
bb4f798a MB |
1888 | !unit_test_assert(u)) |
1889 | return log_unit_notice_errno(u, SYNTHETIC_ERRNO(EPROTO), "Starting requested but asserts failed."); | |
f47781d8 | 1890 | |
bb4f798a MB |
1891 | /* Units of types that aren't supported cannot be started. Note that we do this test only after the |
1892 | * condition checks, so that we rather return condition check errors (which are usually not | |
1893 | * considered a true failure) than "not supported" errors (which are considered a failure). | |
d9dfd233 | 1894 | */ |
f2dec872 | 1895 | if (!unit_type_supported(u->type)) |
d9dfd233 MP |
1896 | return -EOPNOTSUPP; |
1897 | ||
bb4f798a MB |
1898 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine |
1899 | * should have taken care of this already, but let's check this here again. After all, our | |
086111aa | 1900 | * dependencies might not be in effect anymore, due to a reload or due to an unmet condition. */ |
2897b343 MP |
1901 | if (!unit_verify_deps(u)) |
1902 | return -ENOLINK; | |
1903 | ||
663996b3 | 1904 | /* Forward to the main object, if we aren't it. */ |
14228c0d MB |
1905 | following = unit_following(u); |
1906 | if (following) { | |
e3bff60a | 1907 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
086111aa | 1908 | return unit_start(following, details); |
663996b3 MS |
1909 | } |
1910 | ||
ea0999c9 MB |
1911 | /* Check our ability to start early so that failure conditions don't cause us to enter a busy loop. */ |
1912 | if (UNIT_VTABLE(u)->can_start) { | |
1913 | r = UNIT_VTABLE(u)->can_start(u); | |
1914 | if (r < 0) | |
1915 | return r; | |
1916 | } | |
1917 | ||
663996b3 MS |
1918 | /* If it is stopped, but we cannot start it, then fail */ |
1919 | if (!UNIT_VTABLE(u)->start) | |
1920 | return -EBADR; | |
1921 | ||
bb4f798a MB |
1922 | /* We don't suppress calls to ->start() here when we are already starting, to allow this request to |
1923 | * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it | |
1924 | * waits for a holdoff timer to elapse before it will start again. */ | |
663996b3 MS |
1925 | |
1926 | unit_add_to_dbus_queue(u); | |
a10f5d05 | 1927 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
663996b3 | 1928 | |
086111aa LB |
1929 | if (!u->activation_details) /* Older details object wins */ |
1930 | u->activation_details = activation_details_ref(details); | |
1931 | ||
7035cd9e | 1932 | return UNIT_VTABLE(u)->start(u); |
663996b3 MS |
1933 | } |
1934 | ||
1935 | bool unit_can_start(Unit *u) { | |
1936 | assert(u); | |
1937 | ||
d9dfd233 MP |
1938 | if (u->load_state != UNIT_LOADED) |
1939 | return false; | |
1940 | ||
f2dec872 | 1941 | if (!unit_type_supported(u->type)) |
d9dfd233 MP |
1942 | return false; |
1943 | ||
b012e921 MB |
1944 | /* Scope units may be started only once */ |
1945 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
1946 | return false; | |
1947 | ||
663996b3 MS |
1948 | return !!UNIT_VTABLE(u)->start; |
1949 | } | |
1950 | ||
1951 | bool unit_can_isolate(Unit *u) { | |
1952 | assert(u); | |
1953 | ||
1954 | return unit_can_start(u) && | |
1955 | u->allow_isolate; | |
1956 | } | |
1957 | ||
1958 | /* Errors: | |
1959 | * -EBADR: This unit type does not support stopping. | |
1960 | * -EALREADY: Unit is already stopped. | |
1961 | * -EAGAIN: An operation is already in progress. Retry later. | |
1962 | */ | |
1963 | int unit_stop(Unit *u) { | |
1964 | UnitActiveState state; | |
1965 | Unit *following; | |
1966 | ||
1967 | assert(u); | |
1968 | ||
1969 | state = unit_active_state(u); | |
1970 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
1971 | return -EALREADY; | |
1972 | ||
e735f4d4 MP |
1973 | following = unit_following(u); |
1974 | if (following) { | |
e3bff60a | 1975 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
663996b3 MS |
1976 | return unit_stop(following); |
1977 | } | |
1978 | ||
663996b3 MS |
1979 | if (!UNIT_VTABLE(u)->stop) |
1980 | return -EBADR; | |
1981 | ||
1982 | unit_add_to_dbus_queue(u); | |
a10f5d05 | 1983 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
663996b3 | 1984 | |
7035cd9e | 1985 | return UNIT_VTABLE(u)->stop(u); |
663996b3 MS |
1986 | } |
1987 | ||
8a584da2 MP |
1988 | bool unit_can_stop(Unit *u) { |
1989 | assert(u); | |
1990 | ||
a032b68d MB |
1991 | /* Note: if we return true here, it does not mean that the unit may be successfully stopped. |
1992 | * Extrinsic units follow external state and they may stop following external state changes | |
1993 | * (hence we return true here), but an attempt to do this through the manager will fail. */ | |
1994 | ||
f2dec872 | 1995 | if (!unit_type_supported(u->type)) |
8a584da2 MP |
1996 | return false; |
1997 | ||
1998 | if (u->perpetual) | |
1999 | return false; | |
2000 | ||
2001 | return !!UNIT_VTABLE(u)->stop; | |
2002 | } | |
2003 | ||
663996b3 MS |
2004 | /* Errors: |
2005 | * -EBADR: This unit type does not support reloading. | |
2006 | * -ENOEXEC: Unit is not started. | |
2007 | * -EAGAIN: An operation is already in progress. Retry later. | |
2008 | */ | |
2009 | int unit_reload(Unit *u) { | |
2010 | UnitActiveState state; | |
2011 | Unit *following; | |
2012 | ||
2013 | assert(u); | |
2014 | ||
2015 | if (u->load_state != UNIT_LOADED) | |
2016 | return -EINVAL; | |
2017 | ||
2018 | if (!unit_can_reload(u)) | |
2019 | return -EBADR; | |
2020 | ||
2021 | state = unit_active_state(u); | |
2022 | if (state == UNIT_RELOADING) | |
bb4f798a | 2023 | return -EAGAIN; |
663996b3 | 2024 | |
3a6ce677 BR |
2025 | if (state != UNIT_ACTIVE) |
2026 | return log_unit_warning_errno(u, SYNTHETIC_ERRNO(ENOEXEC), "Unit cannot be reloaded because it is inactive."); | |
663996b3 | 2027 | |
60f067b4 JS |
2028 | following = unit_following(u); |
2029 | if (following) { | |
e3bff60a | 2030 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
663996b3 MS |
2031 | return unit_reload(following); |
2032 | } | |
2033 | ||
663996b3 | 2034 | unit_add_to_dbus_queue(u); |
e735f4d4 | 2035 | |
f5e65279 MB |
2036 | if (!UNIT_VTABLE(u)->reload) { |
2037 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
b012e921 | 2038 | unit_notify(u, unit_active_state(u), unit_active_state(u), 0); |
f5e65279 MB |
2039 | return 0; |
2040 | } | |
2041 | ||
a10f5d05 MB |
2042 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
2043 | ||
7035cd9e | 2044 | return UNIT_VTABLE(u)->reload(u); |
663996b3 MS |
2045 | } |
2046 | ||
2047 | bool unit_can_reload(Unit *u) { | |
2048 | assert(u); | |
2049 | ||
f5e65279 MB |
2050 | if (UNIT_VTABLE(u)->can_reload) |
2051 | return UNIT_VTABLE(u)->can_reload(u); | |
663996b3 | 2052 | |
8b3d4ff0 | 2053 | if (unit_has_dependency(u, UNIT_ATOM_PROPAGATES_RELOAD_TO, NULL)) |
663996b3 MS |
2054 | return true; |
2055 | ||
f5e65279 | 2056 | return UNIT_VTABLE(u)->reload; |
663996b3 MS |
2057 | } |
2058 | ||
6e866b33 | 2059 | bool unit_is_unneeded(Unit *u) { |
8b3d4ff0 | 2060 | Unit *other; |
663996b3 MS |
2061 | assert(u); |
2062 | ||
663996b3 | 2063 | if (!u->stop_when_unneeded) |
6e866b33 | 2064 | return false; |
663996b3 | 2065 | |
6e866b33 | 2066 | /* Don't clean up while the unit is transitioning or is even inactive. */ |
8b3d4ff0 | 2067 | if (unit_active_state(u) != UNIT_ACTIVE) |
6e866b33 MB |
2068 | return false; |
2069 | if (u->job) | |
2070 | return false; | |
663996b3 | 2071 | |
8b3d4ff0 | 2072 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_PINS_STOP_WHEN_UNNEEDED) { |
6e866b33 MB |
2073 | /* If a dependent unit has a job queued, is active or transitioning, or is marked for |
2074 | * restart, then don't clean this one up. */ | |
663996b3 | 2075 | |
8b3d4ff0 MB |
2076 | if (other->job) |
2077 | return false; | |
6e866b33 | 2078 | |
8b3d4ff0 MB |
2079 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
2080 | return false; | |
6e866b33 | 2081 | |
8b3d4ff0 MB |
2082 | if (unit_will_restart(other)) |
2083 | return false; | |
e3bff60a | 2084 | } |
663996b3 | 2085 | |
6e866b33 MB |
2086 | return true; |
2087 | } | |
663996b3 | 2088 | |
8b3d4ff0 MB |
2089 | bool unit_is_upheld_by_active(Unit *u, Unit **ret_culprit) { |
2090 | Unit *other; | |
6e866b33 MB |
2091 | |
2092 | assert(u); | |
2093 | ||
8b3d4ff0 MB |
2094 | /* Checks if the unit needs to be started because it currently is not running, but some other unit |
2095 | * that is active declared an Uphold= dependencies on it */ | |
6e866b33 | 2096 | |
8b3d4ff0 MB |
2097 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) || u->job) { |
2098 | if (ret_culprit) | |
2099 | *ret_culprit = NULL; | |
2100 | return false; | |
2101 | } | |
2102 | ||
2103 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_START_STEADILY) { | |
2104 | if (other->job) | |
2105 | continue; | |
6e866b33 | 2106 | |
8b3d4ff0 MB |
2107 | if (UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { |
2108 | if (ret_culprit) | |
2109 | *ret_culprit = other; | |
2110 | return true; | |
2111 | } | |
6e866b33 | 2112 | } |
8b3d4ff0 MB |
2113 | |
2114 | if (ret_culprit) | |
2115 | *ret_culprit = NULL; | |
2116 | return false; | |
663996b3 MS |
2117 | } |
2118 | ||
8b3d4ff0 | 2119 | bool unit_is_bound_by_inactive(Unit *u, Unit **ret_culprit) { |
5eef597e | 2120 | Unit *other; |
5eef597e MP |
2121 | |
2122 | assert(u); | |
2123 | ||
8b3d4ff0 MB |
2124 | /* Checks whether this unit is bound to another unit that is inactive, i.e. whether we should stop |
2125 | * because the other unit is down. */ | |
5eef597e | 2126 | |
8b3d4ff0 MB |
2127 | if (unit_active_state(u) != UNIT_ACTIVE || u->job) { |
2128 | /* Don't clean up while the unit is transitioning or is even inactive. */ | |
2129 | if (ret_culprit) | |
2130 | *ret_culprit = NULL; | |
2131 | return false; | |
2132 | } | |
5eef597e | 2133 | |
8b3d4ff0 | 2134 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { |
5eef597e MP |
2135 | if (other->job) |
2136 | continue; | |
2137 | ||
8b3d4ff0 | 2138 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) { |
ea0999c9 | 2139 | if (ret_culprit) |
8b3d4ff0 | 2140 | *ret_culprit = other; |
5eef597e | 2141 | |
8b3d4ff0 MB |
2142 | return true; |
2143 | } | |
5eef597e MP |
2144 | } |
2145 | ||
8b3d4ff0 MB |
2146 | if (ret_culprit) |
2147 | *ret_culprit = NULL; | |
2148 | return false; | |
2149 | } | |
5eef597e | 2150 | |
8b3d4ff0 MB |
2151 | static void check_unneeded_dependencies(Unit *u) { |
2152 | Unit *other; | |
2153 | assert(u); | |
e3bff60a | 2154 | |
8b3d4ff0 | 2155 | /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */ |
5eef597e | 2156 | |
8b3d4ff0 MB |
2157 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_STOP_WHEN_UNNEEDED_QUEUE) |
2158 | unit_submit_to_stop_when_unneeded_queue(other); | |
2159 | } | |
2160 | ||
2161 | static void check_uphold_dependencies(Unit *u) { | |
2162 | Unit *other; | |
2163 | assert(u); | |
2164 | ||
2165 | /* Add all units this unit depends on to the queue that processes Uphold= behaviour. */ | |
2166 | ||
2167 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_START_WHEN_UPHELD_QUEUE) | |
2168 | unit_submit_to_start_when_upheld_queue(other); | |
2169 | } | |
2170 | ||
2171 | static void check_bound_by_dependencies(Unit *u) { | |
2172 | Unit *other; | |
2173 | assert(u); | |
2174 | ||
2175 | /* Add all units this unit depends on to the queue that processes BindsTo= stop behaviour. */ | |
2176 | ||
2177 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_CANNOT_BE_ACTIVE_WITHOUT_QUEUE) | |
2178 | unit_submit_to_stop_when_bound_queue(other); | |
5eef597e MP |
2179 | } |
2180 | ||
663996b3 | 2181 | static void retroactively_start_dependencies(Unit *u) { |
663996b3 MS |
2182 | Unit *other; |
2183 | ||
2184 | assert(u); | |
2185 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2186 | ||
8b3d4ff0 MB |
2187 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_REPLACE) /* Requires= + BindsTo= */ |
2188 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
663996b3 | 2189 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
bb4f798a | 2190 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
663996b3 | 2191 | |
8b3d4ff0 MB |
2192 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_FAIL) /* Wants= */ |
2193 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
663996b3 | 2194 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
bb4f798a | 2195 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL, NULL); |
663996b3 | 2196 | |
8b3d4ff0 | 2197 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_START) /* Conflicts= (and inverse) */ |
663996b3 | 2198 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
bb4f798a | 2199 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
663996b3 MS |
2200 | } |
2201 | ||
2202 | static void retroactively_stop_dependencies(Unit *u) { | |
663996b3 MS |
2203 | Unit *other; |
2204 | ||
2205 | assert(u); | |
2206 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2207 | ||
2208 | /* Pull down units which are bound to us recursively if enabled */ | |
8b3d4ff0 | 2209 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_STOP) /* BoundBy= */ |
663996b3 | 2210 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
bb4f798a | 2211 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
663996b3 MS |
2212 | } |
2213 | ||
8b3d4ff0 MB |
2214 | void unit_start_on_failure( |
2215 | Unit *u, | |
2216 | const char *dependency_name, | |
2217 | UnitDependencyAtom atom, | |
2218 | JobMode job_mode) { | |
2219 | ||
f5caa8fa | 2220 | int n_jobs = -1; |
663996b3 | 2221 | Unit *other; |
b012e921 | 2222 | int r; |
663996b3 MS |
2223 | |
2224 | assert(u); | |
8b3d4ff0 MB |
2225 | assert(dependency_name); |
2226 | assert(IN_SET(atom, UNIT_ATOM_ON_SUCCESS, UNIT_ATOM_ON_FAILURE)); | |
663996b3 | 2227 | |
8b3d4ff0 | 2228 | /* Act on OnFailure= and OnSuccess= dependencies */ |
663996b3 | 2229 | |
8b3d4ff0 | 2230 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { |
b012e921 | 2231 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
663996b3 | 2232 | |
f5caa8fa | 2233 | if (n_jobs < 0) { |
8b3d4ff0 | 2234 | log_unit_info(u, "Triggering %s dependencies.", dependency_name); |
f5caa8fa | 2235 | n_jobs = 0; |
8b3d4ff0 MB |
2236 | } |
2237 | ||
2238 | r = manager_add_job(u->manager, JOB_START, other, job_mode, NULL, &error, NULL); | |
663996b3 | 2239 | if (r < 0) |
8b3d4ff0 MB |
2240 | log_unit_warning_errno( |
2241 | u, r, "Failed to enqueue %s job, ignoring: %s", | |
2242 | dependency_name, bus_error_message(&error, r)); | |
f5caa8fa | 2243 | n_jobs ++; |
663996b3 | 2244 | } |
8b3d4ff0 | 2245 | |
f5caa8fa | 2246 | if (n_jobs >= 0) |
086111aa | 2247 | log_unit_debug(u, "Triggering %s dependencies done (%i %s).", |
f5caa8fa | 2248 | dependency_name, n_jobs, n_jobs == 1 ? "job" : "jobs"); |
663996b3 MS |
2249 | } |
2250 | ||
2251 | void unit_trigger_notify(Unit *u) { | |
2252 | Unit *other; | |
663996b3 MS |
2253 | |
2254 | assert(u); | |
2255 | ||
8b3d4ff0 | 2256 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_TRIGGERED_BY) |
663996b3 MS |
2257 | if (UNIT_VTABLE(other)->trigger_notify) |
2258 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2259 | } | |
2260 | ||
f2dec872 BR |
2261 | static int raise_level(int log_level, bool condition_info, bool condition_notice) { |
2262 | if (condition_notice && log_level > LOG_NOTICE) | |
2263 | return LOG_NOTICE; | |
2264 | if (condition_info && log_level > LOG_INFO) | |
2265 | return LOG_INFO; | |
2266 | return log_level; | |
2267 | } | |
2268 | ||
f5e65279 | 2269 | static int unit_log_resources(Unit *u) { |
f2dec872 BR |
2270 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + _CGROUP_IO_ACCOUNTING_METRIC_MAX + 4]; |
2271 | bool any_traffic = false, have_ip_accounting = false, any_io = false, have_io_accounting = false; | |
2272 | _cleanup_free_ char *igress = NULL, *egress = NULL, *rr = NULL, *wr = NULL; | |
a10f5d05 | 2273 | int log_level = LOG_DEBUG; /* May be raised if resources consumed over a threshold */ |
f5e65279 | 2274 | size_t n_message_parts = 0, n_iovec = 0; |
f2dec872 | 2275 | char* message_parts[1 + 2 + 2 + 1], *t; |
f5e65279 | 2276 | nsec_t nsec = NSEC_INFINITY; |
f5e65279 MB |
2277 | int r; |
2278 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2279 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2280 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2281 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2282 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2283 | }; | |
f2dec872 BR |
2284 | const char* const io_fields[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
2285 | [CGROUP_IO_READ_BYTES] = "IO_METRIC_READ_BYTES", | |
2286 | [CGROUP_IO_WRITE_BYTES] = "IO_METRIC_WRITE_BYTES", | |
2287 | [CGROUP_IO_READ_OPERATIONS] = "IO_METRIC_READ_OPERATIONS", | |
2288 | [CGROUP_IO_WRITE_OPERATIONS] = "IO_METRIC_WRITE_OPERATIONS", | |
2289 | }; | |
f5e65279 MB |
2290 | |
2291 | assert(u); | |
2292 | ||
2293 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2294 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2295 | * information and the complete data in structured fields. */ | |
2296 | ||
2297 | (void) unit_get_cpu_usage(u, &nsec); | |
2298 | if (nsec != NSEC_INFINITY) { | |
f5e65279 MB |
2299 | /* Format the CPU time for inclusion in the structured log message */ |
2300 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2301 | r = log_oom(); | |
2302 | goto finish; | |
2303 | } | |
2304 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2305 | ||
2306 | /* Format the CPU time for inclusion in the human language message string */ | |
ea0999c9 | 2307 | t = strjoin("consumed ", FORMAT_TIMESPAN(nsec / NSEC_PER_USEC, USEC_PER_MSEC), " CPU time"); |
f5e65279 MB |
2308 | if (!t) { |
2309 | r = log_oom(); | |
2310 | goto finish; | |
2311 | } | |
2312 | ||
2313 | message_parts[n_message_parts++] = t; | |
f2dec872 BR |
2314 | |
2315 | log_level = raise_level(log_level, | |
ea0999c9 MB |
2316 | nsec > MENTIONWORTHY_CPU_NSEC, |
2317 | nsec > NOTICEWORTHY_CPU_NSEC); | |
f2dec872 BR |
2318 | } |
2319 | ||
2320 | for (CGroupIOAccountingMetric k = 0; k < _CGROUP_IO_ACCOUNTING_METRIC_MAX; k++) { | |
f2dec872 BR |
2321 | uint64_t value = UINT64_MAX; |
2322 | ||
2323 | assert(io_fields[k]); | |
2324 | ||
2325 | (void) unit_get_io_accounting(u, k, k > 0, &value); | |
2326 | if (value == UINT64_MAX) | |
2327 | continue; | |
2328 | ||
2329 | have_io_accounting = true; | |
2330 | if (value > 0) | |
2331 | any_io = true; | |
2332 | ||
2333 | /* Format IO accounting data for inclusion in the structured log message */ | |
2334 | if (asprintf(&t, "%s=%" PRIu64, io_fields[k], value) < 0) { | |
2335 | r = log_oom(); | |
2336 | goto finish; | |
2337 | } | |
2338 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2339 | ||
2340 | /* Format the IO accounting data for inclusion in the human language message string, but only | |
2341 | * for the bytes counters (and not for the operations counters) */ | |
2342 | if (k == CGROUP_IO_READ_BYTES) { | |
2343 | assert(!rr); | |
ea0999c9 | 2344 | rr = strjoin("read ", strna(FORMAT_BYTES(value)), " from disk"); |
f2dec872 BR |
2345 | if (!rr) { |
2346 | r = log_oom(); | |
2347 | goto finish; | |
2348 | } | |
2349 | } else if (k == CGROUP_IO_WRITE_BYTES) { | |
2350 | assert(!wr); | |
ea0999c9 | 2351 | wr = strjoin("written ", strna(FORMAT_BYTES(value)), " to disk"); |
f2dec872 BR |
2352 | if (!wr) { |
2353 | r = log_oom(); | |
2354 | goto finish; | |
2355 | } | |
2356 | } | |
2357 | ||
2358 | if (IN_SET(k, CGROUP_IO_READ_BYTES, CGROUP_IO_WRITE_BYTES)) | |
2359 | log_level = raise_level(log_level, | |
2360 | value > MENTIONWORTHY_IO_BYTES, | |
2361 | value > NOTICEWORTHY_IO_BYTES); | |
2362 | } | |
2363 | ||
2364 | if (have_io_accounting) { | |
2365 | if (any_io) { | |
2366 | if (rr) | |
2367 | message_parts[n_message_parts++] = TAKE_PTR(rr); | |
2368 | if (wr) | |
2369 | message_parts[n_message_parts++] = TAKE_PTR(wr); | |
2370 | ||
2371 | } else { | |
2372 | char *k; | |
2373 | ||
2374 | k = strdup("no IO"); | |
2375 | if (!k) { | |
2376 | r = log_oom(); | |
2377 | goto finish; | |
2378 | } | |
2379 | ||
2380 | message_parts[n_message_parts++] = k; | |
2381 | } | |
f5e65279 MB |
2382 | } |
2383 | ||
a032b68d | 2384 | for (CGroupIPAccountingMetric m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
f5e65279 MB |
2385 | uint64_t value = UINT64_MAX; |
2386 | ||
2387 | assert(ip_fields[m]); | |
2388 | ||
2389 | (void) unit_get_ip_accounting(u, m, &value); | |
2390 | if (value == UINT64_MAX) | |
2391 | continue; | |
2392 | ||
6e866b33 MB |
2393 | have_ip_accounting = true; |
2394 | if (value > 0) | |
2395 | any_traffic = true; | |
2396 | ||
f5e65279 MB |
2397 | /* Format IP accounting data for inclusion in the structured log message */ |
2398 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2399 | r = log_oom(); | |
2400 | goto finish; | |
2401 | } | |
2402 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2403 | ||
2404 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2405 | * bytes counters (and not for the packets counters) */ | |
6e866b33 MB |
2406 | if (m == CGROUP_IP_INGRESS_BYTES) { |
2407 | assert(!igress); | |
ea0999c9 | 2408 | igress = strjoin("received ", strna(FORMAT_BYTES(value)), " IP traffic"); |
6e866b33 MB |
2409 | if (!igress) { |
2410 | r = log_oom(); | |
2411 | goto finish; | |
2412 | } | |
2413 | } else if (m == CGROUP_IP_EGRESS_BYTES) { | |
2414 | assert(!egress); | |
ea0999c9 | 2415 | egress = strjoin("sent ", strna(FORMAT_BYTES(value)), " IP traffic"); |
6e866b33 MB |
2416 | if (!egress) { |
2417 | r = log_oom(); | |
2418 | goto finish; | |
2419 | } | |
f5e65279 | 2420 | } |
f2dec872 BR |
2421 | |
2422 | if (IN_SET(m, CGROUP_IP_INGRESS_BYTES, CGROUP_IP_EGRESS_BYTES)) | |
2423 | log_level = raise_level(log_level, | |
2424 | value > MENTIONWORTHY_IP_BYTES, | |
2425 | value > NOTICEWORTHY_IP_BYTES); | |
6e866b33 | 2426 | } |
f5e65279 | 2427 | |
5b5a102a MB |
2428 | /* This check is here because it is the earliest point following all possible log_level assignments. If |
2429 | * log_level is assigned anywhere after this point, move this check. */ | |
2430 | if (!unit_log_level_test(u, log_level)) { | |
2431 | r = 0; | |
2432 | goto finish; | |
2433 | } | |
2434 | ||
6e866b33 MB |
2435 | if (have_ip_accounting) { |
2436 | if (any_traffic) { | |
2437 | if (igress) | |
2438 | message_parts[n_message_parts++] = TAKE_PTR(igress); | |
2439 | if (egress) | |
2440 | message_parts[n_message_parts++] = TAKE_PTR(egress); | |
2441 | ||
2442 | } else { | |
2443 | char *k; | |
2444 | ||
2445 | k = strdup("no IP traffic"); | |
2446 | if (!k) { | |
2447 | r = log_oom(); | |
2448 | goto finish; | |
2449 | } | |
2450 | ||
2451 | message_parts[n_message_parts++] = k; | |
2452 | } | |
f5e65279 MB |
2453 | } |
2454 | ||
2455 | /* Is there any accounting data available at all? */ | |
2456 | if (n_iovec == 0) { | |
2457 | r = 0; | |
2458 | goto finish; | |
2459 | } | |
2460 | ||
2461 | if (n_message_parts == 0) | |
6e866b33 | 2462 | t = strjoina("MESSAGE=", u->id, ": Completed."); |
f5e65279 | 2463 | else { |
5b5a102a | 2464 | _cleanup_free_ char *joined = NULL; |
f5e65279 MB |
2465 | |
2466 | message_parts[n_message_parts] = NULL; | |
2467 | ||
2468 | joined = strv_join(message_parts, ", "); | |
2469 | if (!joined) { | |
2470 | r = log_oom(); | |
2471 | goto finish; | |
2472 | } | |
2473 | ||
6e866b33 MB |
2474 | joined[0] = ascii_toupper(joined[0]); |
2475 | t = strjoina("MESSAGE=", u->id, ": ", joined, "."); | |
f5e65279 MB |
2476 | } |
2477 | ||
2478 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2479 | * and hence don't increase n_iovec for them */ | |
2480 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2481 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2482 | ||
2483 | t = strjoina(u->manager->unit_log_field, u->id); | |
2484 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2485 | ||
2486 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2487 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2488 | ||
5b5a102a | 2489 | log_unit_struct_iovec(u, log_level, iovec, n_iovec + 4); |
f5e65279 MB |
2490 | r = 0; |
2491 | ||
2492 | finish: | |
a032b68d | 2493 | for (size_t i = 0; i < n_message_parts; i++) |
f5e65279 MB |
2494 | free(message_parts[i]); |
2495 | ||
a032b68d | 2496 | for (size_t i = 0; i < n_iovec; i++) |
f5e65279 MB |
2497 | free(iovec[i].iov_base); |
2498 | ||
2499 | return r; | |
2500 | ||
2501 | } | |
2502 | ||
1d42b86d MB |
2503 | static void unit_update_on_console(Unit *u) { |
2504 | bool b; | |
2505 | ||
2506 | assert(u); | |
2507 | ||
2508 | b = unit_needs_console(u); | |
2509 | if (u->on_console == b) | |
2510 | return; | |
2511 | ||
2512 | u->on_console = b; | |
2513 | if (b) | |
2514 | manager_ref_console(u->manager); | |
2515 | else | |
2516 | manager_unref_console(u->manager); | |
1d42b86d MB |
2517 | } |
2518 | ||
6e866b33 MB |
2519 | static void unit_emit_audit_start(Unit *u) { |
2520 | assert(u); | |
2521 | ||
2522 | if (u->type != UNIT_SERVICE) | |
2523 | return; | |
2524 | ||
2525 | /* Write audit record if we have just finished starting up */ | |
2526 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); | |
2527 | u->in_audit = true; | |
2528 | } | |
2529 | ||
2530 | static void unit_emit_audit_stop(Unit *u, UnitActiveState state) { | |
2531 | assert(u); | |
2532 | ||
2533 | if (u->type != UNIT_SERVICE) | |
2534 | return; | |
2535 | ||
2536 | if (u->in_audit) { | |
2537 | /* Write audit record if we have just finished shutting down */ | |
2538 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, state == UNIT_INACTIVE); | |
2539 | u->in_audit = false; | |
2540 | } else { | |
2541 | /* Hmm, if there was no start record written write it now, so that we always have a nice pair */ | |
2542 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, state == UNIT_INACTIVE); | |
2543 | ||
2544 | if (state == UNIT_INACTIVE) | |
2545 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); | |
2546 | } | |
2547 | } | |
2548 | ||
2549 | static bool unit_process_job(Job *j, UnitActiveState ns, UnitNotifyFlags flags) { | |
2550 | bool unexpected = false; | |
f2dec872 | 2551 | JobResult result; |
6e866b33 MB |
2552 | |
2553 | assert(j); | |
2554 | ||
2555 | if (j->state == JOB_WAITING) | |
2556 | ||
2557 | /* So we reached a different state for this job. Let's see if we can run it now if it failed previously | |
2558 | * due to EAGAIN. */ | |
2559 | job_add_to_run_queue(j); | |
2560 | ||
2561 | /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and | |
2562 | * hence needs to invalidate jobs. */ | |
2563 | ||
2564 | switch (j->type) { | |
2565 | ||
2566 | case JOB_START: | |
2567 | case JOB_VERIFY_ACTIVE: | |
2568 | ||
2569 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
2570 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2571 | else if (j->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
2572 | unexpected = true; | |
2573 | ||
f2dec872 BR |
2574 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
2575 | if (ns == UNIT_FAILED) | |
2576 | result = JOB_FAILED; | |
f2dec872 BR |
2577 | else |
2578 | result = JOB_DONE; | |
2579 | ||
2580 | job_finish_and_invalidate(j, result, true, false); | |
2581 | } | |
6e866b33 MB |
2582 | } |
2583 | ||
2584 | break; | |
2585 | ||
2586 | case JOB_RELOAD: | |
2587 | case JOB_RELOAD_OR_START: | |
2588 | case JOB_TRY_RELOAD: | |
2589 | ||
2590 | if (j->state == JOB_RUNNING) { | |
2591 | if (ns == UNIT_ACTIVE) | |
2592 | job_finish_and_invalidate(j, (flags & UNIT_NOTIFY_RELOAD_FAILURE) ? JOB_FAILED : JOB_DONE, true, false); | |
2593 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { | |
2594 | unexpected = true; | |
2595 | ||
2596 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2597 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2598 | } | |
2599 | } | |
2600 | ||
2601 | break; | |
2602 | ||
2603 | case JOB_STOP: | |
2604 | case JOB_RESTART: | |
2605 | case JOB_TRY_RESTART: | |
2606 | ||
2607 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2608 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2609 | else if (j->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
2610 | unexpected = true; | |
2611 | job_finish_and_invalidate(j, JOB_FAILED, true, false); | |
2612 | } | |
2613 | ||
2614 | break; | |
2615 | ||
2616 | default: | |
ea0999c9 | 2617 | assert_not_reached(); |
6e866b33 MB |
2618 | } |
2619 | ||
2620 | return unexpected; | |
2621 | } | |
2622 | ||
b012e921 | 2623 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, UnitNotifyFlags flags) { |
6e866b33 | 2624 | const char *reason; |
98393f85 | 2625 | Manager *m; |
663996b3 MS |
2626 | |
2627 | assert(u); | |
2628 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2629 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
2630 | ||
98393f85 MB |
2631 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2632 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2633 | * remounted this function will be called too! */ | |
663996b3 MS |
2634 | |
2635 | m = u->manager; | |
2636 | ||
6e866b33 MB |
2637 | /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in |
2638 | * the bus queue, so that any job change signal queued will force out the unit change signal first. */ | |
2639 | unit_add_to_dbus_queue(u); | |
2640 | ||
a032b68d MB |
2641 | /* Update systemd-oomd on the property/state change */ |
2642 | if (os != ns) { | |
2643 | /* Always send an update if the unit is going into an inactive state so systemd-oomd knows to stop | |
2644 | * monitoring. | |
2645 | * Also send an update whenever the unit goes active; this is to handle a case where an override file | |
2646 | * sets one of the ManagedOOM*= properties to "kill", then later removes it. systemd-oomd needs to | |
2647 | * know to stop monitoring when the unit changes from "kill" -> "auto" on daemon-reload, but we don't | |
2648 | * have the information on the property. Thus, indiscriminately send an update. */ | |
2649 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) || UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
2650 | (void) manager_varlink_send_managed_oom_update(u); | |
2651 | } | |
2652 | ||
60f067b4 | 2653 | /* Update timestamps for state changes */ |
aa27b158 | 2654 | if (!MANAGER_IS_RELOADING(m)) { |
4c89c718 | 2655 | dual_timestamp_get(&u->state_change_timestamp); |
663996b3 MS |
2656 | |
2657 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
4c89c718 | 2658 | u->inactive_exit_timestamp = u->state_change_timestamp; |
663996b3 | 2659 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
4c89c718 | 2660 | u->inactive_enter_timestamp = u->state_change_timestamp; |
663996b3 MS |
2661 | |
2662 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
4c89c718 | 2663 | u->active_enter_timestamp = u->state_change_timestamp; |
663996b3 | 2664 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
4c89c718 | 2665 | u->active_exit_timestamp = u->state_change_timestamp; |
663996b3 MS |
2666 | } |
2667 | ||
60f067b4 | 2668 | /* Keep track of failed units */ |
6e866b33 | 2669 | (void) manager_update_failed_units(m, u, ns == UNIT_FAILED); |
60f067b4 | 2670 | |
52ad194e MB |
2671 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2672 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
3a6ce677 BR |
2673 | SET_FLAG(u->markers, |
2674 | (1u << UNIT_MARKER_NEEDS_RELOAD)|(1u << UNIT_MARKER_NEEDS_RESTART), | |
2675 | false); | |
d9dfd233 | 2676 | unit_prune_cgroup(u); |
52ad194e | 2677 | unit_unlink_state_files(u); |
3a6ce677 BR |
2678 | } else if (ns != os && ns == UNIT_RELOADING) |
2679 | SET_FLAG(u->markers, 1u << UNIT_MARKER_NEEDS_RELOAD, false); | |
663996b3 | 2680 | |
1d42b86d | 2681 | unit_update_on_console(u); |
663996b3 | 2682 | |
aa27b158 | 2683 | if (!MANAGER_IS_RELOADING(m)) { |
6e866b33 | 2684 | bool unexpected; |
663996b3 | 2685 | |
6e866b33 MB |
2686 | /* Let's propagate state changes to the job */ |
2687 | if (u->job) | |
2688 | unexpected = unit_process_job(u->job, ns, flags); | |
2689 | else | |
2690 | unexpected = true; | |
2691 | ||
2692 | /* If this state change happened without being requested by a job, then let's retroactively start or | |
2693 | * stop dependencies. We skip that step when deserializing, since we don't want to create any | |
2694 | * additional jobs just because something is already activated. */ | |
663996b3 MS |
2695 | |
2696 | if (unexpected) { | |
2697 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2698 | retroactively_start_dependencies(u); | |
2699 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2700 | retroactively_stop_dependencies(u); | |
2701 | } | |
2702 | ||
663996b3 | 2703 | if (ns != os && ns == UNIT_FAILED) { |
f5e65279 | 2704 | log_unit_debug(u, "Unit entered failed state."); |
b012e921 MB |
2705 | |
2706 | if (!(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
8b3d4ff0 | 2707 | unit_start_on_failure(u, "OnFailure=", UNIT_ATOM_ON_FAILURE, u->on_failure_job_mode); |
663996b3 | 2708 | } |
663996b3 | 2709 | |
6e866b33 MB |
2710 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns) && !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
2711 | /* This unit just finished starting up */ | |
663996b3 | 2712 | |
6e866b33 | 2713 | unit_emit_audit_start(u); |
663996b3 | 2714 | manager_send_unit_plymouth(m, u); |
6e866b33 | 2715 | } |
663996b3 | 2716 | |
6e866b33 | 2717 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && !UNIT_IS_INACTIVE_OR_FAILED(os)) { |
f5e65279 | 2718 | /* This unit just stopped/failed. */ |
663996b3 | 2719 | |
6e866b33 | 2720 | unit_emit_audit_stop(u, ns); |
f5e65279 | 2721 | unit_log_resources(u); |
663996b3 | 2722 | } |
8b3d4ff0 MB |
2723 | |
2724 | if (ns == UNIT_INACTIVE && !IN_SET(os, UNIT_FAILED, UNIT_INACTIVE, UNIT_MAINTENANCE) && | |
2725 | !(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
2726 | unit_start_on_failure(u, "OnSuccess=", UNIT_ATOM_ON_SUCCESS, u->on_success_job_mode); | |
663996b3 MS |
2727 | } |
2728 | ||
2729 | manager_recheck_journal(m); | |
98393f85 | 2730 | manager_recheck_dbus(m); |
b012e921 | 2731 | |
663996b3 MS |
2732 | unit_trigger_notify(u); |
2733 | ||
6e866b33 | 2734 | if (!MANAGER_IS_RELOADING(m)) { |
6e866b33 MB |
2735 | if (os != UNIT_FAILED && ns == UNIT_FAILED) { |
2736 | reason = strjoina("unit ", u->id, " failed"); | |
bb4f798a | 2737 | emergency_action(m, u->failure_action, 0, u->reboot_arg, unit_failure_action_exit_status(u), reason); |
6e866b33 MB |
2738 | } else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) { |
2739 | reason = strjoina("unit ", u->id, " succeeded"); | |
bb4f798a | 2740 | emergency_action(m, u->success_action, 0, u->reboot_arg, unit_success_action_exit_status(u), reason); |
6e866b33 | 2741 | } |
5eef597e MP |
2742 | } |
2743 | ||
8b3d4ff0 MB |
2744 | /* And now, add the unit or depending units to various queues that will act on the new situation if |
2745 | * needed. These queues generally check for continuous state changes rather than events (like most of | |
2746 | * the state propagation above), and do work deferred instead of instantly, since they typically | |
2747 | * don't want to run during reloading, and usually involve checking combined state of multiple units | |
2748 | * at once. */ | |
2749 | ||
2750 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
2751 | /* Stop unneeded units and bound-by units regardless if going down was expected or not */ | |
2752 | check_unneeded_dependencies(u); | |
2753 | check_bound_by_dependencies(u); | |
2754 | ||
2755 | /* Maybe someone wants us to remain up? */ | |
2756 | unit_submit_to_start_when_upheld_queue(u); | |
2757 | ||
2758 | /* Maybe the unit should be GC'ed now? */ | |
2759 | unit_add_to_gc_queue(u); | |
2760 | } | |
2761 | ||
2762 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
2763 | /* Start uphold units regardless if going up was expected or not */ | |
2764 | check_uphold_dependencies(u); | |
2765 | ||
2766 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ | |
2767 | unit_submit_to_stop_when_unneeded_queue(u); | |
2768 | ||
2769 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens | |
2770 | * when something BindsTo= to a Type=oneshot unit, as these units go directly from starting to | |
2771 | * inactive, without ever entering started.) */ | |
2772 | unit_submit_to_stop_when_bound_queue(u); | |
2773 | } | |
663996b3 MS |
2774 | } |
2775 | ||
bb4f798a | 2776 | int unit_watch_pid(Unit *u, pid_t pid, bool exclusive) { |
1d42b86d | 2777 | int r; |
663996b3 MS |
2778 | |
2779 | assert(u); | |
1d42b86d | 2780 | assert(pid_is_valid(pid)); |
663996b3 | 2781 | |
1d42b86d | 2782 | /* Watch a specific PID */ |
663996b3 | 2783 | |
bb4f798a MB |
2784 | /* Caller might be sure that this PID belongs to this unit only. Let's take this |
2785 | * opportunity to remove any stalled references to this PID as they can be created | |
2786 | * easily (when watching a process which is not our direct child). */ | |
2787 | if (exclusive) | |
2788 | manager_unwatch_pid(u->manager, pid); | |
2789 | ||
5eef597e | 2790 | r = set_ensure_allocated(&u->pids, NULL); |
60f067b4 JS |
2791 | if (r < 0) |
2792 | return r; | |
663996b3 | 2793 | |
1d42b86d | 2794 | r = hashmap_ensure_allocated(&u->manager->watch_pids, NULL); |
60f067b4 JS |
2795 | if (r < 0) |
2796 | return r; | |
663996b3 | 2797 | |
1d42b86d MB |
2798 | /* First try, let's add the unit keyed by "pid". */ |
2799 | r = hashmap_put(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2800 | if (r == -EEXIST) { | |
2801 | Unit **array; | |
2802 | bool found = false; | |
2803 | size_t n = 0; | |
663996b3 | 2804 | |
1d42b86d MB |
2805 | /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points |
2806 | * to an array of Units rather than just a Unit), lists us already. */ | |
663996b3 | 2807 | |
1d42b86d MB |
2808 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); |
2809 | if (array) | |
2810 | for (; array[n]; n++) | |
2811 | if (array[n] == u) | |
2812 | found = true; | |
663996b3 | 2813 | |
1d42b86d MB |
2814 | if (found) /* Found it already? if so, do nothing */ |
2815 | r = 0; | |
2816 | else { | |
2817 | Unit **new_array; | |
2818 | ||
2819 | /* Allocate a new array */ | |
2820 | new_array = new(Unit*, n + 2); | |
2821 | if (!new_array) | |
2822 | return -ENOMEM; | |
2823 | ||
2824 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2825 | new_array[n] = u; | |
2826 | new_array[n+1] = NULL; | |
2827 | ||
2828 | /* Add or replace the old array */ | |
2829 | r = hashmap_replace(u->manager->watch_pids, PID_TO_PTR(-pid), new_array); | |
2830 | if (r < 0) { | |
2831 | free(new_array); | |
2832 | return r; | |
2833 | } | |
2834 | ||
2835 | free(array); | |
2836 | } | |
2837 | } else if (r < 0) | |
2838 | return r; | |
2839 | ||
2840 | r = set_put(u->pids, PID_TO_PTR(pid)); | |
2841 | if (r < 0) | |
2842 | return r; | |
2843 | ||
2844 | return 0; | |
663996b3 MS |
2845 | } |
2846 | ||
60f067b4 | 2847 | void unit_unwatch_pid(Unit *u, pid_t pid) { |
1d42b86d MB |
2848 | Unit **array; |
2849 | ||
663996b3 | 2850 | assert(u); |
1d42b86d MB |
2851 | assert(pid_is_valid(pid)); |
2852 | ||
2853 | /* First let's drop the unit in case it's keyed as "pid". */ | |
2854 | (void) hashmap_remove_value(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2855 | ||
2856 | /* Then, let's also drop the unit, in case it's in the array keyed by -pid */ | |
2857 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); | |
2858 | if (array) { | |
1d42b86d | 2859 | /* Let's iterate through the array, dropping our own entry */ |
a032b68d MB |
2860 | |
2861 | size_t m = 0; | |
2862 | for (size_t n = 0; array[n]; n++) | |
1d42b86d MB |
2863 | if (array[n] != u) |
2864 | array[m++] = array[n]; | |
2865 | array[m] = NULL; | |
2866 | ||
2867 | if (m == 0) { | |
2868 | /* The array is now empty, remove the entire entry */ | |
20a6e51f | 2869 | assert_se(hashmap_remove(u->manager->watch_pids, PID_TO_PTR(-pid)) == array); |
1d42b86d MB |
2870 | free(array); |
2871 | } | |
2872 | } | |
663996b3 | 2873 | |
d9dfd233 | 2874 | (void) set_remove(u->pids, PID_TO_PTR(pid)); |
663996b3 MS |
2875 | } |
2876 | ||
60f067b4 | 2877 | void unit_unwatch_all_pids(Unit *u) { |
663996b3 | 2878 | assert(u); |
663996b3 | 2879 | |
60f067b4 | 2880 | while (!set_isempty(u->pids)) |
d9dfd233 | 2881 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
60f067b4 | 2882 | |
d9dfd233 | 2883 | u->pids = set_free(u->pids); |
663996b3 MS |
2884 | } |
2885 | ||
b012e921 MB |
2886 | static void unit_tidy_watch_pids(Unit *u) { |
2887 | pid_t except1, except2; | |
60f067b4 JS |
2888 | void *e; |
2889 | ||
663996b3 | 2890 | assert(u); |
663996b3 | 2891 | |
60f067b4 | 2892 | /* Cleans dead PIDs from our list */ |
663996b3 | 2893 | |
b012e921 MB |
2894 | except1 = unit_main_pid(u); |
2895 | except2 = unit_control_pid(u); | |
2896 | ||
a032b68d | 2897 | SET_FOREACH(e, u->pids) { |
d9dfd233 | 2898 | pid_t pid = PTR_TO_PID(e); |
663996b3 | 2899 | |
60f067b4 JS |
2900 | if (pid == except1 || pid == except2) |
2901 | continue; | |
663996b3 | 2902 | |
60f067b4 JS |
2903 | if (!pid_is_unwaited(pid)) |
2904 | unit_unwatch_pid(u, pid); | |
2905 | } | |
663996b3 MS |
2906 | } |
2907 | ||
b012e921 | 2908 | static int on_rewatch_pids_event(sd_event_source *s, void *userdata) { |
086111aa | 2909 | Unit *u = ASSERT_PTR(userdata); |
b012e921 MB |
2910 | |
2911 | assert(s); | |
b012e921 MB |
2912 | |
2913 | unit_tidy_watch_pids(u); | |
2914 | unit_watch_all_pids(u); | |
2915 | ||
2916 | /* If the PID set is empty now, then let's finish this off. */ | |
2917 | unit_synthesize_cgroup_empty_event(u); | |
2918 | ||
2919 | return 0; | |
2920 | } | |
2921 | ||
2922 | int unit_enqueue_rewatch_pids(Unit *u) { | |
2923 | int r; | |
2924 | ||
2925 | assert(u); | |
2926 | ||
2927 | if (!u->cgroup_path) | |
2928 | return -ENOENT; | |
2929 | ||
2930 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
2931 | if (r < 0) | |
2932 | return r; | |
2933 | if (r > 0) /* On unified we can use proper notifications */ | |
2934 | return 0; | |
2935 | ||
2936 | /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new | |
2937 | * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it | |
2938 | * involves issuing kill(pid, 0) on all processes we watch. */ | |
2939 | ||
2940 | if (!u->rewatch_pids_event_source) { | |
2941 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
2942 | ||
2943 | r = sd_event_add_defer(u->manager->event, &s, on_rewatch_pids_event, u); | |
2944 | if (r < 0) | |
2945 | return log_error_errno(r, "Failed to allocate event source for tidying watched PIDs: %m"); | |
2946 | ||
2947 | r = sd_event_source_set_priority(s, SD_EVENT_PRIORITY_IDLE); | |
2948 | if (r < 0) | |
e1f67bc7 | 2949 | return log_error_errno(r, "Failed to adjust priority of event source for tidying watched PIDs: %m"); |
b012e921 MB |
2950 | |
2951 | (void) sd_event_source_set_description(s, "tidy-watch-pids"); | |
2952 | ||
2953 | u->rewatch_pids_event_source = TAKE_PTR(s); | |
2954 | } | |
2955 | ||
2956 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_ONESHOT); | |
2957 | if (r < 0) | |
2958 | return log_error_errno(r, "Failed to enable event source for tidying watched PIDs: %m"); | |
2959 | ||
2960 | return 0; | |
2961 | } | |
2962 | ||
2963 | void unit_dequeue_rewatch_pids(Unit *u) { | |
2964 | int r; | |
2965 | assert(u); | |
2966 | ||
2967 | if (!u->rewatch_pids_event_source) | |
2968 | return; | |
2969 | ||
2970 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_OFF); | |
2971 | if (r < 0) | |
2972 | log_warning_errno(r, "Failed to disable event source for tidying watched PIDs, ignoring: %m"); | |
2973 | ||
67bbd050 | 2974 | u->rewatch_pids_event_source = sd_event_source_disable_unref(u->rewatch_pids_event_source); |
b012e921 MB |
2975 | } |
2976 | ||
663996b3 MS |
2977 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2978 | assert(u); | |
2979 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2980 | ||
2981 | switch (j) { | |
2982 | ||
2983 | case JOB_VERIFY_ACTIVE: | |
2984 | case JOB_START: | |
663996b3 | 2985 | case JOB_NOP: |
8a584da2 | 2986 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
a10f5d05 | 2987 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueuing |
8a584da2 | 2988 | * jobs for it. */ |
663996b3 MS |
2989 | return true; |
2990 | ||
8a584da2 MP |
2991 | case JOB_STOP: |
2992 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
a10f5d05 | 2993 | * external events), hence it makes no sense to permit enqueuing such a request either. */ |
8a584da2 MP |
2994 | return !u->perpetual; |
2995 | ||
663996b3 MS |
2996 | case JOB_RESTART: |
2997 | case JOB_TRY_RESTART: | |
8a584da2 | 2998 | return unit_can_stop(u) && unit_can_start(u); |
663996b3 MS |
2999 | |
3000 | case JOB_RELOAD: | |
4c89c718 | 3001 | case JOB_TRY_RELOAD: |
663996b3 MS |
3002 | return unit_can_reload(u); |
3003 | ||
3004 | case JOB_RELOAD_OR_START: | |
3005 | return unit_can_reload(u) && unit_can_start(u); | |
3006 | ||
3007 | default: | |
ea0999c9 | 3008 | assert_not_reached(); |
663996b3 MS |
3009 | } |
3010 | } | |
3011 | ||
52ad194e MB |
3012 | int unit_add_dependency( |
3013 | Unit *u, | |
3014 | UnitDependency d, | |
3015 | Unit *other, | |
3016 | bool add_reference, | |
3017 | UnitDependencyMask mask) { | |
663996b3 MS |
3018 | |
3019 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
f5caa8fa MB |
3020 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, |
3021 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, | |
3022 | [UNIT_WANTS] = UNIT_WANTED_BY, | |
3023 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, | |
3024 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, | |
3025 | [UNIT_UPHOLDS] = UNIT_UPHELD_BY, | |
3026 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, | |
3027 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, | |
3028 | [UNIT_WANTED_BY] = UNIT_WANTS, | |
3029 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, | |
3030 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, | |
3031 | [UNIT_UPHELD_BY] = UNIT_UPHOLDS, | |
3032 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, | |
3033 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
3034 | [UNIT_BEFORE] = UNIT_AFTER, | |
3035 | [UNIT_AFTER] = UNIT_BEFORE, | |
3036 | [UNIT_ON_SUCCESS] = UNIT_ON_SUCCESS_OF, | |
3037 | [UNIT_ON_SUCCESS_OF] = UNIT_ON_SUCCESS, | |
3038 | [UNIT_ON_FAILURE] = UNIT_ON_FAILURE_OF, | |
3039 | [UNIT_ON_FAILURE_OF] = UNIT_ON_FAILURE, | |
3040 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
3041 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, | |
3042 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, | |
663996b3 | 3043 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
f5caa8fa MB |
3044 | [UNIT_PROPAGATES_STOP_TO] = UNIT_STOP_PROPAGATED_FROM, |
3045 | [UNIT_STOP_PROPAGATED_FROM] = UNIT_PROPAGATES_STOP_TO, | |
3046 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, /* symmetric! 👓 */ | |
3047 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, | |
3048 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, | |
3049 | [UNIT_IN_SLICE] = UNIT_SLICE_OF, | |
3050 | [UNIT_SLICE_OF] = UNIT_IN_SLICE, | |
663996b3 | 3051 | }; |
8b3d4ff0 | 3052 | UnitDependencyAtom a; |
52ad194e | 3053 | int r; |
8b3d4ff0 MB |
3054 | |
3055 | /* Helper to know whether sending a notification is necessary or not: if the dependency is already | |
3056 | * there, no need to notify! */ | |
086111aa | 3057 | bool notify, notify_other = false; |
663996b3 MS |
3058 | |
3059 | assert(u); | |
3060 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
3061 | assert(other); | |
3062 | ||
3063 | u = unit_follow_merge(u); | |
3064 | other = unit_follow_merge(other); | |
8b3d4ff0 MB |
3065 | a = unit_dependency_to_atom(d); |
3066 | assert(a >= 0); | |
663996b3 | 3067 | |
8b3d4ff0 | 3068 | /* We won't allow dependencies on ourselves. We will not consider them an error however. */ |
5eef597e | 3069 | if (u == other) { |
a6810822 LB |
3070 | if (unit_should_warn_about_dependency(d)) |
3071 | log_unit_warning(u, "Dependency %s=%s is dropped.", | |
3072 | unit_dependency_to_string(d), u->id); | |
663996b3 | 3073 | return 0; |
5eef597e | 3074 | } |
663996b3 | 3075 | |
ea0999c9 MB |
3076 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3077 | return 0; | |
3078 | ||
8b3d4ff0 MB |
3079 | /* Note that ordering a device unit after a unit is permitted since it allows to start its job |
3080 | * running timeout at a specific time. */ | |
3081 | if (FLAGS_SET(a, UNIT_ATOM_BEFORE) && other->type == UNIT_DEVICE) { | |
20a6e51f | 3082 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
46cdbd49 BR |
3083 | return 0; |
3084 | } | |
3085 | ||
8b3d4ff0 | 3086 | if (FLAGS_SET(a, UNIT_ATOM_ON_FAILURE) && !UNIT_VTABLE(u)->can_fail) { |
46cdbd49 | 3087 | log_unit_warning(u, "Requested dependency OnFailure=%s ignored (%s units cannot fail).", other->id, unit_type_to_string(u->type)); |
8a584da2 MP |
3088 | return 0; |
3089 | } | |
3090 | ||
8b3d4ff0 | 3091 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERS) && !UNIT_VTABLE(u)->can_trigger) |
46cdbd49 BR |
3092 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3093 | "Requested dependency Triggers=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(u->type)); | |
8b3d4ff0 | 3094 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERED_BY) && !UNIT_VTABLE(other)->can_trigger) |
46cdbd49 BR |
3095 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3096 | "Requested dependency TriggeredBy=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(other->type)); | |
3097 | ||
8b3d4ff0 MB |
3098 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && other->type != UNIT_SLICE) |
3099 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3100 | "Requested dependency Slice=%s refused (%s is not a slice unit).", other->id, other->id); | |
3101 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && u->type != UNIT_SLICE) | |
3102 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3103 | "Requested dependency SliceOf=%s refused (%s is not a slice unit).", other->id, u->id); | |
3104 | ||
3105 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && !UNIT_HAS_CGROUP_CONTEXT(u)) | |
3106 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3107 | "Requested dependency Slice=%s refused (%s is not a cgroup unit).", other->id, u->id); | |
3108 | ||
3109 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && !UNIT_HAS_CGROUP_CONTEXT(other)) | |
3110 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3111 | "Requested dependency SliceOf=%s refused (%s is not a cgroup unit).", other->id, other->id); | |
3112 | ||
3113 | r = unit_add_dependency_hashmap(&u->dependencies, d, other, mask, 0); | |
60f067b4 | 3114 | if (r < 0) |
663996b3 | 3115 | return r; |
086111aa | 3116 | notify = r > 0; |
663996b3 | 3117 | |
52ad194e | 3118 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
8b3d4ff0 | 3119 | r = unit_add_dependency_hashmap(&other->dependencies, inverse_table[d], u, 0, mask); |
60f067b4 | 3120 | if (r < 0) |
663996b3 | 3121 | return r; |
086111aa | 3122 | notify_other = r > 0; |
60f067b4 | 3123 | } |
663996b3 | 3124 | |
60f067b4 | 3125 | if (add_reference) { |
8b3d4ff0 | 3126 | r = unit_add_dependency_hashmap(&u->dependencies, UNIT_REFERENCES, other, mask, 0); |
60f067b4 | 3127 | if (r < 0) |
663996b3 | 3128 | return r; |
086111aa | 3129 | notify = notify || r > 0; |
663996b3 | 3130 | |
8b3d4ff0 | 3131 | r = unit_add_dependency_hashmap(&other->dependencies, UNIT_REFERENCED_BY, u, 0, mask); |
60f067b4 JS |
3132 | if (r < 0) |
3133 | return r; | |
086111aa | 3134 | notify_other = notify_other || r > 0; |
60f067b4 JS |
3135 | } |
3136 | ||
086111aa | 3137 | if (notify) |
a032b68d | 3138 | unit_add_to_dbus_queue(u); |
086111aa LB |
3139 | if (notify_other) |
3140 | unit_add_to_dbus_queue(other); | |
8b3d4ff0 | 3141 | |
086111aa | 3142 | return notify || notify_other; |
663996b3 MS |
3143 | } |
3144 | ||
52ad194e | 3145 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
086111aa | 3146 | int r, s; |
663996b3 MS |
3147 | |
3148 | assert(u); | |
3149 | ||
52ad194e | 3150 | r = unit_add_dependency(u, d, other, add_reference, mask); |
5eef597e | 3151 | if (r < 0) |
663996b3 MS |
3152 | return r; |
3153 | ||
086111aa LB |
3154 | s = unit_add_dependency(u, e, other, add_reference, mask); |
3155 | if (s < 0) | |
3156 | return s; | |
3157 | ||
3158 | return r > 0 || s > 0; | |
663996b3 MS |
3159 | } |
3160 | ||
6e866b33 | 3161 | static int resolve_template(Unit *u, const char *name, char **buf, const char **ret) { |
e3bff60a | 3162 | int r; |
663996b3 MS |
3163 | |
3164 | assert(u); | |
6e866b33 | 3165 | assert(name); |
e3bff60a MP |
3166 | assert(buf); |
3167 | assert(ret); | |
663996b3 | 3168 | |
e3bff60a MP |
3169 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
3170 | *buf = NULL; | |
3171 | *ret = name; | |
3172 | return 0; | |
663996b3 MS |
3173 | } |
3174 | ||
3175 | if (u->instance) | |
e3bff60a | 3176 | r = unit_name_replace_instance(name, u->instance, buf); |
663996b3 MS |
3177 | else { |
3178 | _cleanup_free_ char *i = NULL; | |
3179 | ||
e3bff60a MP |
3180 | r = unit_name_to_prefix(u->id, &i); |
3181 | if (r < 0) | |
3182 | return r; | |
663996b3 | 3183 | |
e3bff60a | 3184 | r = unit_name_replace_instance(name, i, buf); |
663996b3 | 3185 | } |
e3bff60a MP |
3186 | if (r < 0) |
3187 | return r; | |
663996b3 | 3188 | |
e3bff60a MP |
3189 | *ret = *buf; |
3190 | return 0; | |
663996b3 MS |
3191 | } |
3192 | ||
6e866b33 | 3193 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, bool add_reference, UnitDependencyMask mask) { |
e3bff60a | 3194 | _cleanup_free_ char *buf = NULL; |
663996b3 MS |
3195 | Unit *other; |
3196 | int r; | |
663996b3 MS |
3197 | |
3198 | assert(u); | |
6e866b33 | 3199 | assert(name); |
663996b3 | 3200 | |
6e866b33 | 3201 | r = resolve_template(u, name, &buf, &name); |
e3bff60a MP |
3202 | if (r < 0) |
3203 | return r; | |
663996b3 | 3204 | |
ea0999c9 MB |
3205 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3206 | return 0; | |
3207 | ||
6e866b33 | 3208 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
663996b3 MS |
3209 | if (r < 0) |
3210 | return r; | |
3211 | ||
52ad194e | 3212 | return unit_add_dependency(u, d, other, add_reference, mask); |
663996b3 MS |
3213 | } |
3214 | ||
6e866b33 | 3215 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, bool add_reference, UnitDependencyMask mask) { |
e3bff60a | 3216 | _cleanup_free_ char *buf = NULL; |
663996b3 MS |
3217 | Unit *other; |
3218 | int r; | |
663996b3 MS |
3219 | |
3220 | assert(u); | |
6e866b33 | 3221 | assert(name); |
663996b3 | 3222 | |
6e866b33 | 3223 | r = resolve_template(u, name, &buf, &name); |
e3bff60a MP |
3224 | if (r < 0) |
3225 | return r; | |
663996b3 | 3226 | |
ea0999c9 MB |
3227 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3228 | return 0; | |
3229 | ||
6e866b33 | 3230 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
5eef597e | 3231 | if (r < 0) |
14228c0d | 3232 | return r; |
663996b3 | 3233 | |
52ad194e | 3234 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
663996b3 MS |
3235 | } |
3236 | ||
663996b3 | 3237 | int set_unit_path(const char *p) { |
663996b3 | 3238 | /* This is mostly for debug purposes */ |
ea0999c9 | 3239 | return RET_NERRNO(setenv("SYSTEMD_UNIT_PATH", p, 1)); |
663996b3 MS |
3240 | } |
3241 | ||
3242 | char *unit_dbus_path(Unit *u) { | |
3243 | assert(u); | |
3244 | ||
3245 | if (!u->id) | |
3246 | return NULL; | |
3247 | ||
3248 | return unit_dbus_path_from_name(u->id); | |
3249 | } | |
3250 | ||
8a584da2 MP |
3251 | char *unit_dbus_path_invocation_id(Unit *u) { |
3252 | assert(u); | |
3253 | ||
3254 | if (sd_id128_is_null(u->invocation_id)) | |
3255 | return NULL; | |
3256 | ||
3257 | return unit_dbus_path_from_name(u->invocation_id_string); | |
3258 | } | |
3259 | ||
3a6ce677 | 3260 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { |
a10f5d05 MB |
3261 | int r; |
3262 | ||
3263 | assert(u); | |
3264 | ||
3265 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
3266 | ||
3267 | if (sd_id128_equal(u->invocation_id, id)) | |
3268 | return 0; | |
3269 | ||
3270 | if (!sd_id128_is_null(u->invocation_id)) | |
3271 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3272 | ||
3273 | if (sd_id128_is_null(id)) { | |
3274 | r = 0; | |
3275 | goto reset; | |
3276 | } | |
3277 | ||
3278 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
3279 | if (r < 0) | |
3280 | goto reset; | |
3281 | ||
3282 | u->invocation_id = id; | |
3283 | sd_id128_to_string(id, u->invocation_id_string); | |
3284 | ||
3285 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3286 | if (r < 0) | |
3287 | goto reset; | |
3288 | ||
3289 | return 0; | |
3290 | ||
3291 | reset: | |
3292 | u->invocation_id = SD_ID128_NULL; | |
3293 | u->invocation_id_string[0] = 0; | |
3294 | return r; | |
3295 | } | |
3296 | ||
ea0999c9 | 3297 | int unit_set_slice(Unit *u, Unit *slice) { |
8b3d4ff0 MB |
3298 | int r; |
3299 | ||
663996b3 | 3300 | assert(u); |
d9dfd233 | 3301 | assert(slice); |
663996b3 | 3302 | |
8b3d4ff0 MB |
3303 | /* Sets the unit slice if it has not been set before. Is extra careful, to only allow this for units |
3304 | * that actually have a cgroup context. Also, we don't allow to set this for slices (since the parent | |
3305 | * slice is derived from the name). Make sure the unit we set is actually a slice. */ | |
663996b3 | 3306 | |
d9dfd233 MP |
3307 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
3308 | return -EOPNOTSUPP; | |
663996b3 | 3309 | |
d9dfd233 MP |
3310 | if (u->type == UNIT_SLICE) |
3311 | return -EINVAL; | |
663996b3 | 3312 | |
d9dfd233 MP |
3313 | if (unit_active_state(u) != UNIT_INACTIVE) |
3314 | return -EBUSY; | |
3315 | ||
3316 | if (slice->type != UNIT_SLICE) | |
3317 | return -EINVAL; | |
3318 | ||
3319 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && | |
3320 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
3321 | return -EPERM; | |
3322 | ||
8b3d4ff0 | 3323 | if (UNIT_GET_SLICE(u) == slice) |
d9dfd233 MP |
3324 | return 0; |
3325 | ||
aa27b158 | 3326 | /* Disallow slice changes if @u is already bound to cgroups */ |
8b3d4ff0 | 3327 | if (UNIT_GET_SLICE(u) && u->cgroup_realized) |
d9dfd233 MP |
3328 | return -EBUSY; |
3329 | ||
ea0999c9 MB |
3330 | /* Remove any slices assigned prior; we should only have one UNIT_IN_SLICE dependency */ |
3331 | if (UNIT_GET_SLICE(u)) | |
3332 | unit_remove_dependencies(u, UNIT_DEPENDENCY_SLICE_PROPERTY); | |
3333 | ||
3334 | r = unit_add_dependency(u, UNIT_IN_SLICE, slice, true, UNIT_DEPENDENCY_SLICE_PROPERTY); | |
8b3d4ff0 MB |
3335 | if (r < 0) |
3336 | return r; | |
3337 | ||
d9dfd233 | 3338 | return 1; |
663996b3 MS |
3339 | } |
3340 | ||
d9dfd233 | 3341 | int unit_set_default_slice(Unit *u) { |
14228c0d MB |
3342 | const char *slice_name; |
3343 | Unit *slice; | |
663996b3 MS |
3344 | int r; |
3345 | ||
3346 | assert(u); | |
663996b3 | 3347 | |
ea0999c9 MB |
3348 | if (u->manager && FLAGS_SET(u->manager->test_run_flags, MANAGER_TEST_RUN_IGNORE_DEPENDENCIES)) |
3349 | return 0; | |
3350 | ||
8b3d4ff0 | 3351 | if (UNIT_GET_SLICE(u)) |
663996b3 MS |
3352 | return 0; |
3353 | ||
14228c0d MB |
3354 | if (u->instance) { |
3355 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
663996b3 | 3356 | |
14228c0d MB |
3357 | /* Implicitly place all instantiated units in their |
3358 | * own per-template slice */ | |
663996b3 | 3359 | |
e3bff60a MP |
3360 | r = unit_name_to_prefix(u->id, &prefix); |
3361 | if (r < 0) | |
3362 | return r; | |
663996b3 | 3363 | |
14228c0d MB |
3364 | /* The prefix is already escaped, but it might include |
3365 | * "-" which has a special meaning for slice units, | |
3366 | * hence escape it here extra. */ | |
e3bff60a | 3367 | escaped = unit_name_escape(prefix); |
14228c0d MB |
3368 | if (!escaped) |
3369 | return -ENOMEM; | |
663996b3 | 3370 | |
aa27b158 | 3371 | if (MANAGER_IS_SYSTEM(u->manager)) |
6e866b33 | 3372 | slice_name = strjoina("system-", escaped, ".slice"); |
14228c0d | 3373 | else |
a032b68d MB |
3374 | slice_name = strjoina("app-", escaped, ".slice"); |
3375 | ||
3376 | } else if (unit_is_extrinsic(u)) | |
3377 | /* Keep all extrinsic units (e.g. perpetual units and swap and mount units in user mode) in | |
3378 | * the root slice. They don't really belong in one of the subslices. */ | |
3379 | slice_name = SPECIAL_ROOT_SLICE; | |
3380 | ||
3381 | else if (MANAGER_IS_SYSTEM(u->manager)) | |
3382 | slice_name = SPECIAL_SYSTEM_SLICE; | |
3383 | else | |
3384 | slice_name = SPECIAL_APP_SLICE; | |
663996b3 | 3385 | |
14228c0d | 3386 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); |
663996b3 MS |
3387 | if (r < 0) |
3388 | return r; | |
3389 | ||
ea0999c9 | 3390 | return unit_set_slice(u, slice); |
663996b3 MS |
3391 | } |
3392 | ||
14228c0d | 3393 | const char *unit_slice_name(Unit *u) { |
8b3d4ff0 | 3394 | Unit *slice; |
663996b3 | 3395 | assert(u); |
663996b3 | 3396 | |
8b3d4ff0 MB |
3397 | slice = UNIT_GET_SLICE(u); |
3398 | if (!slice) | |
14228c0d | 3399 | return NULL; |
663996b3 | 3400 | |
8b3d4ff0 | 3401 | return slice->id; |
663996b3 MS |
3402 | } |
3403 | ||
3404 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { | |
3405 | _cleanup_free_ char *t = NULL; | |
3406 | int r; | |
3407 | ||
3408 | assert(u); | |
3409 | assert(type); | |
3410 | assert(_found); | |
3411 | ||
e3bff60a MP |
3412 | r = unit_name_change_suffix(u->id, type, &t); |
3413 | if (r < 0) | |
3414 | return r; | |
3415 | if (unit_has_name(u, t)) | |
3416 | return -EINVAL; | |
663996b3 MS |
3417 | |
3418 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); | |
3419 | assert(r < 0 || *_found != u); | |
3420 | return r; | |
3421 | } | |
3422 | ||
13d276d0 | 3423 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
46cdbd49 | 3424 | const char *new_owner; |
086111aa | 3425 | Unit *u = ASSERT_PTR(userdata); |
13d276d0 MP |
3426 | int r; |
3427 | ||
3428 | assert(message); | |
13d276d0 | 3429 | |
46cdbd49 | 3430 | r = sd_bus_message_read(message, "sss", NULL, NULL, &new_owner); |
13d276d0 MP |
3431 | if (r < 0) { |
3432 | bus_log_parse_error(r); | |
3433 | return 0; | |
3434 | } | |
3435 | ||
3436 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
46cdbd49 | 3437 | UNIT_VTABLE(u)->bus_name_owner_change(u, empty_to_null(new_owner)); |
c5fca32e MB |
3438 | |
3439 | return 0; | |
3440 | } | |
3441 | ||
3442 | static int get_name_owner_handler(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
3443 | const sd_bus_error *e; | |
3444 | const char *new_owner; | |
086111aa | 3445 | Unit *u = ASSERT_PTR(userdata); |
c5fca32e MB |
3446 | int r; |
3447 | ||
3448 | assert(message); | |
c5fca32e MB |
3449 | |
3450 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); | |
3451 | ||
c5fca32e | 3452 | e = sd_bus_message_get_error(message); |
c5fca32e | 3453 | if (e) { |
9cde670f LB |
3454 | if (!sd_bus_error_has_name(e, "org.freedesktop.DBus.Error.NameHasNoOwner")) { |
3455 | r = sd_bus_error_get_errno(e); | |
3456 | log_unit_error_errno(u, r, | |
3457 | "Unexpected error response from GetNameOwner(): %s", | |
3458 | bus_error_message(e, r)); | |
3459 | } | |
c5fca32e | 3460 | |
46cdbd49 BR |
3461 | new_owner = NULL; |
3462 | } else { | |
3463 | r = sd_bus_message_read(message, "s", &new_owner); | |
3464 | if (r < 0) | |
3465 | return bus_log_parse_error(r); | |
c5fca32e | 3466 | |
46cdbd49 BR |
3467 | assert(!isempty(new_owner)); |
3468 | } | |
c5fca32e MB |
3469 | |
3470 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
46cdbd49 | 3471 | UNIT_VTABLE(u)->bus_name_owner_change(u, new_owner); |
13d276d0 MP |
3472 | |
3473 | return 0; | |
3474 | } | |
3475 | ||
db2df898 MP |
3476 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3477 | const char *match; | |
46cdbd49 | 3478 | int r; |
13d276d0 | 3479 | |
db2df898 MP |
3480 | assert(u); |
3481 | assert(bus); | |
3482 | assert(name); | |
13d276d0 | 3483 | |
46cdbd49 | 3484 | if (u->match_bus_slot || u->get_name_owner_slot) |
13d276d0 MP |
3485 | return -EBUSY; |
3486 | ||
db2df898 | 3487 | match = strjoina("type='signal'," |
aa27b158 MP |
3488 | "sender='org.freedesktop.DBus'," |
3489 | "path='/org/freedesktop/DBus'," | |
3490 | "interface='org.freedesktop.DBus'," | |
3491 | "member='NameOwnerChanged'," | |
3492 | "arg0='", name, "'"); | |
13d276d0 | 3493 | |
46cdbd49 | 3494 | r = sd_bus_add_match_async(bus, &u->match_bus_slot, match, signal_name_owner_changed, NULL, u); |
c5fca32e MB |
3495 | if (r < 0) |
3496 | return r; | |
3497 | ||
46cdbd49 BR |
3498 | r = sd_bus_call_method_async( |
3499 | bus, | |
3500 | &u->get_name_owner_slot, | |
3501 | "org.freedesktop.DBus", | |
3502 | "/org/freedesktop/DBus", | |
3503 | "org.freedesktop.DBus", | |
3504 | "GetNameOwner", | |
3505 | get_name_owner_handler, | |
3506 | u, | |
3507 | "s", name); | |
3508 | if (r < 0) { | |
3509 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3510 | return r; | |
3511 | } | |
3512 | ||
3513 | log_unit_debug(u, "Watching D-Bus name '%s'.", name); | |
3514 | return 0; | |
13d276d0 MP |
3515 | } |
3516 | ||
663996b3 | 3517 | int unit_watch_bus_name(Unit *u, const char *name) { |
13d276d0 MP |
3518 | int r; |
3519 | ||
663996b3 MS |
3520 | assert(u); |
3521 | assert(name); | |
3522 | ||
3523 | /* Watch a specific name on the bus. We only support one unit | |
3524 | * watching each name for now. */ | |
3525 | ||
13d276d0 MP |
3526 | if (u->manager->api_bus) { |
3527 | /* If the bus is already available, install the match directly. | |
3528 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
db2df898 | 3529 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
13d276d0 | 3530 | if (r < 0) |
db2df898 | 3531 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
13d276d0 MP |
3532 | } |
3533 | ||
3534 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3535 | if (r < 0) { | |
3536 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
46cdbd49 | 3537 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
13d276d0 MP |
3538 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); |
3539 | } | |
3540 | ||
3541 | return 0; | |
663996b3 MS |
3542 | } |
3543 | ||
3544 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3545 | assert(u); | |
3546 | assert(name); | |
3547 | ||
2897b343 | 3548 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
13d276d0 | 3549 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
c5fca32e | 3550 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
663996b3 MS |
3551 | } |
3552 | ||
e1f67bc7 | 3553 | int unit_add_node_dependency(Unit *u, const char *what, UnitDependency dep, UnitDependencyMask mask) { |
14228c0d | 3554 | _cleanup_free_ char *e = NULL; |
46cdbd49 | 3555 | Unit *device; |
663996b3 MS |
3556 | int r; |
3557 | ||
3558 | assert(u); | |
3559 | ||
663996b3 | 3560 | /* Adds in links to the device node that this unit is based on */ |
e3bff60a MP |
3561 | if (isempty(what)) |
3562 | return 0; | |
663996b3 MS |
3563 | |
3564 | if (!is_device_path(what)) | |
3565 | return 0; | |
3566 | ||
46cdbd49 | 3567 | /* When device units aren't supported (such as in a container), don't create dependencies on them. */ |
e3bff60a MP |
3568 | if (!unit_type_supported(UNIT_DEVICE)) |
3569 | return 0; | |
663996b3 | 3570 | |
e3bff60a MP |
3571 | r = unit_name_from_path(what, ".device", &e); |
3572 | if (r < 0) | |
3573 | return r; | |
14228c0d | 3574 | |
e3bff60a | 3575 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
663996b3 MS |
3576 | if (r < 0) |
3577 | return r; | |
3578 | ||
2897b343 MP |
3579 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3580 | dep = UNIT_BINDS_TO; | |
3581 | ||
e1f67bc7 MB |
3582 | return unit_add_two_dependencies(u, UNIT_AFTER, |
3583 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, | |
3584 | device, true, mask); | |
663996b3 MS |
3585 | } |
3586 | ||
46cdbd49 BR |
3587 | int unit_add_blockdev_dependency(Unit *u, const char *what, UnitDependencyMask mask) { |
3588 | _cleanup_free_ char *escaped = NULL, *target = NULL; | |
3589 | int r; | |
3590 | ||
3591 | assert(u); | |
3592 | ||
3593 | if (isempty(what)) | |
3594 | return 0; | |
3595 | ||
3596 | if (!path_startswith(what, "/dev/")) | |
3597 | return 0; | |
3598 | ||
3599 | /* If we don't support devices, then also don't bother with blockdev@.target */ | |
3600 | if (!unit_type_supported(UNIT_DEVICE)) | |
3601 | return 0; | |
3602 | ||
3603 | r = unit_name_path_escape(what, &escaped); | |
3604 | if (r < 0) | |
3605 | return r; | |
3606 | ||
3607 | r = unit_name_build("blockdev", escaped, ".target", &target); | |
3608 | if (r < 0) | |
3609 | return r; | |
3610 | ||
3611 | return unit_add_dependency_by_name(u, UNIT_AFTER, target, true, mask); | |
3612 | } | |
3613 | ||
663996b3 | 3614 | int unit_coldplug(Unit *u) { |
8a584da2 | 3615 | int r = 0, q; |
663996b3 MS |
3616 | |
3617 | assert(u); | |
3618 | ||
b012e921 | 3619 | /* Make sure we don't enter a loop, when coldplugging recursively. */ |
e3bff60a MP |
3620 | if (u->coldplugged) |
3621 | return 0; | |
3622 | ||
3623 | u->coldplugged = true; | |
3624 | ||
8a584da2 MP |
3625 | STRV_FOREACH(i, u->deserialized_refs) { |
3626 | q = bus_unit_track_add_name(u, *i); | |
3627 | if (q < 0 && r >= 0) | |
3628 | r = q; | |
3629 | } | |
3630 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
663996b3 | 3631 | |
8a584da2 MP |
3632 | if (UNIT_VTABLE(u)->coldplug) { |
3633 | q = UNIT_VTABLE(u)->coldplug(u); | |
3634 | if (q < 0 && r >= 0) | |
3635 | r = q; | |
3636 | } | |
663996b3 | 3637 | |
2c6f20ef MB |
3638 | if (u->job) { |
3639 | q = job_coldplug(u->job); | |
3640 | if (q < 0 && r >= 0) | |
3641 | r = q; | |
3642 | } | |
3643 | if (u->nop_job) { | |
3644 | q = job_coldplug(u->nop_job); | |
8a584da2 MP |
3645 | if (q < 0 && r >= 0) |
3646 | r = q; | |
3647 | } | |
663996b3 | 3648 | |
8a584da2 | 3649 | return r; |
663996b3 | 3650 | } |
663996b3 | 3651 | |
b012e921 MB |
3652 | void unit_catchup(Unit *u) { |
3653 | assert(u); | |
3654 | ||
3655 | if (UNIT_VTABLE(u)->catchup) | |
3656 | UNIT_VTABLE(u)->catchup(u); | |
2c6f20ef MB |
3657 | |
3658 | unit_cgroup_catchup(u); | |
b012e921 MB |
3659 | } |
3660 | ||
8a584da2 | 3661 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
663996b3 | 3662 | struct stat st; |
663996b3 | 3663 | |
aa27b158 MP |
3664 | if (!path) |
3665 | return false; | |
663996b3 | 3666 | |
2897b343 MP |
3667 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3668 | * are never out-of-date. */ | |
3669 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3670 | return false; | |
3671 | ||
aa27b158 MP |
3672 | if (stat(path, &st) < 0) |
3673 | /* What, cannot access this anymore? */ | |
3674 | return true; | |
663996b3 | 3675 | |
8a584da2 MP |
3676 | if (path_masked) |
3677 | /* For masked files check if they are still so */ | |
3678 | return !null_or_empty(&st); | |
3679 | else | |
aa27b158 MP |
3680 | /* For non-empty files check the mtime */ |
3681 | return timespec_load(&st.st_mtim) > mtime; | |
663996b3 | 3682 | |
aa27b158 MP |
3683 | return false; |
3684 | } | |
663996b3 | 3685 | |
aa27b158 MP |
3686 | bool unit_need_daemon_reload(Unit *u) { |
3687 | _cleanup_strv_free_ char **t = NULL; | |
663996b3 | 3688 | |
aa27b158 | 3689 | assert(u); |
663996b3 | 3690 | |
8a584da2 MP |
3691 | /* For unit files, we allow masking… */ |
3692 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3693 | u->load_state == UNIT_MASKED)) | |
aa27b158 | 3694 | return true; |
663996b3 | 3695 | |
8a584da2 MP |
3696 | /* Source paths should not be masked… */ |
3697 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
aa27b158 | 3698 | return true; |
663996b3 | 3699 | |
52ad194e MB |
3700 | if (u->load_state == UNIT_LOADED) |
3701 | (void) unit_find_dropin_paths(u, &t); | |
aa27b158 MP |
3702 | if (!strv_equal(u->dropin_paths, t)) |
3703 | return true; | |
663996b3 | 3704 | |
8a584da2 | 3705 | /* … any drop-ins that are masked are simply omitted from the list. */ |
aa27b158 | 3706 | STRV_FOREACH(path, u->dropin_paths) |
8a584da2 | 3707 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
663996b3 | 3708 | return true; |
aa27b158 MP |
3709 | |
3710 | return false; | |
663996b3 MS |
3711 | } |
3712 | ||
3713 | void unit_reset_failed(Unit *u) { | |
3714 | assert(u); | |
3715 | ||
3716 | if (UNIT_VTABLE(u)->reset_failed) | |
3717 | UNIT_VTABLE(u)->reset_failed(u); | |
4c89c718 | 3718 | |
e1f67bc7 | 3719 | ratelimit_reset(&u->start_ratelimit); |
4c89c718 | 3720 | u->start_limit_hit = false; |
663996b3 MS |
3721 | } |
3722 | ||
3723 | Unit *unit_following(Unit *u) { | |
3724 | assert(u); | |
3725 | ||
3726 | if (UNIT_VTABLE(u)->following) | |
3727 | return UNIT_VTABLE(u)->following(u); | |
3728 | ||
3729 | return NULL; | |
3730 | } | |
3731 | ||
3732 | bool unit_stop_pending(Unit *u) { | |
3733 | assert(u); | |
3734 | ||
3735 | /* This call does check the current state of the unit. It's | |
3736 | * hence useful to be called from state change calls of the | |
3737 | * unit itself, where the state isn't updated yet. This is | |
3738 | * different from unit_inactive_or_pending() which checks both | |
3739 | * the current state and for a queued job. */ | |
3740 | ||
e1f67bc7 | 3741 | return unit_has_job_type(u, JOB_STOP); |
663996b3 MS |
3742 | } |
3743 | ||
3744 | bool unit_inactive_or_pending(Unit *u) { | |
3745 | assert(u); | |
3746 | ||
3747 | /* Returns true if the unit is inactive or going down */ | |
3748 | ||
3749 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) | |
3750 | return true; | |
3751 | ||
3752 | if (unit_stop_pending(u)) | |
3753 | return true; | |
3754 | ||
3755 | return false; | |
3756 | } | |
3757 | ||
3758 | bool unit_active_or_pending(Unit *u) { | |
3759 | assert(u); | |
3760 | ||
3761 | /* Returns true if the unit is active or going up */ | |
3762 | ||
3763 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3764 | return true; | |
3765 | ||
3766 | if (u->job && | |
f5e65279 | 3767 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
663996b3 MS |
3768 | return true; |
3769 | ||
3770 | return false; | |
3771 | } | |
3772 | ||
812752cc MB |
3773 | bool unit_will_restart_default(Unit *u) { |
3774 | assert(u); | |
3775 | ||
e1f67bc7 | 3776 | return unit_has_job_type(u, JOB_START); |
812752cc MB |
3777 | } |
3778 | ||
52ad194e MB |
3779 | bool unit_will_restart(Unit *u) { |
3780 | assert(u); | |
3781 | ||
3782 | if (!UNIT_VTABLE(u)->will_restart) | |
3783 | return false; | |
3784 | ||
3785 | return UNIT_VTABLE(u)->will_restart(u); | |
3786 | } | |
3787 | ||
60f067b4 | 3788 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
663996b3 MS |
3789 | assert(u); |
3790 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
aa27b158 | 3791 | assert(SIGNAL_VALID(signo)); |
663996b3 MS |
3792 | |
3793 | if (!UNIT_VTABLE(u)->kill) | |
e3bff60a | 3794 | return -EOPNOTSUPP; |
663996b3 MS |
3795 | |
3796 | return UNIT_VTABLE(u)->kill(u, w, signo, error); | |
3797 | } | |
3798 | ||
f5caa8fa MB |
3799 | void unit_notify_cgroup_oom(Unit *u, bool managed_oom) { |
3800 | assert(u); | |
3801 | ||
3802 | if (UNIT_VTABLE(u)->notify_cgroup_oom) | |
3803 | UNIT_VTABLE(u)->notify_cgroup_oom(u, managed_oom); | |
3804 | } | |
3805 | ||
14228c0d | 3806 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
b012e921 | 3807 | _cleanup_set_free_ Set *pid_set = NULL; |
14228c0d MB |
3808 | int r; |
3809 | ||
5eef597e | 3810 | pid_set = set_new(NULL); |
14228c0d MB |
3811 | if (!pid_set) |
3812 | return NULL; | |
3813 | ||
3814 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3815 | if (main_pid > 0) { | |
d9dfd233 | 3816 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
14228c0d | 3817 | if (r < 0) |
b012e921 | 3818 | return NULL; |
14228c0d MB |
3819 | } |
3820 | ||
3821 | if (control_pid > 0) { | |
d9dfd233 | 3822 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
14228c0d | 3823 | if (r < 0) |
b012e921 | 3824 | return NULL; |
14228c0d MB |
3825 | } |
3826 | ||
b012e921 | 3827 | return TAKE_PTR(pid_set); |
14228c0d MB |
3828 | } |
3829 | ||
a032b68d MB |
3830 | static int kill_common_log(pid_t pid, int signo, void *userdata) { |
3831 | _cleanup_free_ char *comm = NULL; | |
086111aa | 3832 | Unit *u = ASSERT_PTR(userdata); |
a032b68d MB |
3833 | |
3834 | (void) get_process_comm(pid, &comm); | |
3835 | log_unit_info(u, "Sending signal SIG%s to process " PID_FMT " (%s) on client request.", | |
3836 | signal_to_string(signo), pid, strna(comm)); | |
3837 | ||
3838 | return 1; | |
3839 | } | |
3840 | ||
663996b3 MS |
3841 | int unit_kill_common( |
3842 | Unit *u, | |
3843 | KillWho who, | |
3844 | int signo, | |
3845 | pid_t main_pid, | |
3846 | pid_t control_pid, | |
60f067b4 | 3847 | sd_bus_error *error) { |
663996b3 MS |
3848 | |
3849 | int r = 0; | |
6300502b | 3850 | bool killed = false; |
663996b3 | 3851 | |
a032b68d MB |
3852 | /* This is the common implementation for explicit user-requested killing of unit processes, shared by |
3853 | * various unit types. Do not confuse with unit_kill_context(), which is what we use when we want to | |
3854 | * stop a service ourselves. */ | |
3855 | ||
6300502b | 3856 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
663996b3 | 3857 | if (main_pid < 0) |
f47781d8 | 3858 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
a032b68d | 3859 | if (main_pid == 0) |
f47781d8 | 3860 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
663996b3 MS |
3861 | } |
3862 | ||
6300502b | 3863 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
663996b3 | 3864 | if (control_pid < 0) |
f47781d8 | 3865 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
a032b68d | 3866 | if (control_pid == 0) |
f47781d8 | 3867 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
663996b3 MS |
3868 | } |
3869 | ||
6300502b MP |
3870 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3871 | if (control_pid > 0) { | |
a032b68d MB |
3872 | _cleanup_free_ char *comm = NULL; |
3873 | (void) get_process_comm(control_pid, &comm); | |
3874 | ||
3875 | if (kill(control_pid, signo) < 0) { | |
3876 | /* Report this failure both to the logs and to the client */ | |
3877 | sd_bus_error_set_errnof( | |
3878 | error, errno, | |
3879 | "Failed to send signal SIG%s to control process " PID_FMT " (%s): %m", | |
3880 | signal_to_string(signo), control_pid, strna(comm)); | |
3881 | r = log_unit_warning_errno( | |
3882 | u, errno, | |
3883 | "Failed to send signal SIG%s to control process " PID_FMT " (%s) on client request: %m", | |
3884 | signal_to_string(signo), control_pid, strna(comm)); | |
3885 | } else { | |
3886 | log_unit_info(u, "Sent signal SIG%s to control process " PID_FMT " (%s) on client request.", | |
3887 | signal_to_string(signo), control_pid, strna(comm)); | |
6300502b | 3888 | killed = true; |
a032b68d | 3889 | } |
6300502b | 3890 | } |
663996b3 | 3891 | |
6300502b MP |
3892 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3893 | if (main_pid > 0) { | |
a032b68d MB |
3894 | _cleanup_free_ char *comm = NULL; |
3895 | (void) get_process_comm(main_pid, &comm); | |
3896 | ||
3897 | if (kill(main_pid, signo) < 0) { | |
3898 | if (r == 0) | |
3899 | sd_bus_error_set_errnof( | |
3900 | error, errno, | |
3901 | "Failed to send signal SIG%s to main process " PID_FMT " (%s): %m", | |
3902 | signal_to_string(signo), main_pid, strna(comm)); | |
3903 | ||
3904 | r = log_unit_warning_errno( | |
3905 | u, errno, | |
3906 | "Failed to send signal SIG%s to main process " PID_FMT " (%s) on client request: %m", | |
3907 | signal_to_string(signo), main_pid, strna(comm)); | |
3908 | } else { | |
3909 | log_unit_info(u, "Sent signal SIG%s to main process " PID_FMT " (%s) on client request.", | |
3910 | signal_to_string(signo), main_pid, strna(comm)); | |
6300502b | 3911 | killed = true; |
a032b68d | 3912 | } |
6300502b | 3913 | } |
663996b3 | 3914 | |
6300502b | 3915 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
663996b3 MS |
3916 | _cleanup_set_free_ Set *pid_set = NULL; |
3917 | int q; | |
3918 | ||
14228c0d MB |
3919 | /* Exclude the main/control pids from being killed via the cgroup */ |
3920 | pid_set = unit_pid_set(main_pid, control_pid); | |
663996b3 | 3921 | if (!pid_set) |
a032b68d | 3922 | return log_oom(); |
663996b3 | 3923 | |
a032b68d MB |
3924 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, kill_common_log, u); |
3925 | if (q < 0) { | |
3926 | if (!IN_SET(q, -ESRCH, -ENOENT)) { | |
3927 | if (r == 0) | |
3928 | sd_bus_error_set_errnof( | |
3929 | error, q, | |
3930 | "Failed to send signal SIG%s to auxiliary processes: %m", | |
3931 | signal_to_string(signo)); | |
3932 | ||
3933 | r = log_unit_warning_errno( | |
3934 | u, q, | |
3935 | "Failed to send signal SIG%s to auxiliary processes on client request: %m", | |
3936 | signal_to_string(signo)); | |
3937 | } | |
3938 | } else | |
6300502b | 3939 | killed = true; |
663996b3 MS |
3940 | } |
3941 | ||
a032b68d MB |
3942 | /* If the "fail" versions of the operation are requested, then complain if the set of processes we killed is empty */ |
3943 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL, KILL_MAIN_FAIL)) | |
3944 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No matching processes to kill"); | |
6300502b | 3945 | |
663996b3 MS |
3946 | return r; |
3947 | } | |
3948 | ||
3949 | int unit_following_set(Unit *u, Set **s) { | |
3950 | assert(u); | |
3951 | assert(s); | |
3952 | ||
3953 | if (UNIT_VTABLE(u)->following_set) | |
3954 | return UNIT_VTABLE(u)->following_set(u, s); | |
3955 | ||
3956 | *s = NULL; | |
3957 | return 0; | |
3958 | } | |
3959 | ||
3960 | UnitFileState unit_get_unit_file_state(Unit *u) { | |
db2df898 MP |
3961 | int r; |
3962 | ||
663996b3 MS |
3963 | assert(u); |
3964 | ||
db2df898 MP |
3965 | if (u->unit_file_state < 0 && u->fragment_path) { |
3966 | r = unit_file_get_state( | |
aa27b158 | 3967 | u->manager->unit_file_scope, |
db2df898 | 3968 | NULL, |
98393f85 | 3969 | u->id, |
db2df898 MP |
3970 | &u->unit_file_state); |
3971 | if (r < 0) | |
3972 | u->unit_file_state = UNIT_FILE_BAD; | |
3973 | } | |
663996b3 MS |
3974 | |
3975 | return u->unit_file_state; | |
3976 | } | |
3977 | ||
f47781d8 MP |
3978 | int unit_get_unit_file_preset(Unit *u) { |
3979 | assert(u); | |
3980 | ||
3981 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3982 | u->unit_file_preset = unit_file_query_preset( | |
aa27b158 | 3983 | u->manager->unit_file_scope, |
db2df898 | 3984 | NULL, |
a10f5d05 MB |
3985 | basename(u->fragment_path), |
3986 | NULL); | |
f47781d8 MP |
3987 | |
3988 | return u->unit_file_preset; | |
3989 | } | |
3990 | ||
98393f85 | 3991 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
663996b3 | 3992 | assert(ref); |
98393f85 MB |
3993 | assert(source); |
3994 | assert(target); | |
663996b3 | 3995 | |
98393f85 | 3996 | if (ref->target) |
663996b3 MS |
3997 | unit_ref_unset(ref); |
3998 | ||
98393f85 MB |
3999 | ref->source = source; |
4000 | ref->target = target; | |
4001 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
4002 | return target; | |
663996b3 MS |
4003 | } |
4004 | ||
4005 | void unit_ref_unset(UnitRef *ref) { | |
4006 | assert(ref); | |
4007 | ||
98393f85 | 4008 | if (!ref->target) |
663996b3 MS |
4009 | return; |
4010 | ||
aa27b158 MP |
4011 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
4012 | * be unreferenced now. */ | |
98393f85 | 4013 | unit_add_to_gc_queue(ref->target); |
aa27b158 | 4014 | |
98393f85 MB |
4015 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
4016 | ref->source = ref->target = NULL; | |
663996b3 MS |
4017 | } |
4018 | ||
8a584da2 MP |
4019 | static int user_from_unit_name(Unit *u, char **ret) { |
4020 | ||
4021 | static const uint8_t hash_key[] = { | |
4022 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
4023 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
4024 | }; | |
4025 | ||
4026 | _cleanup_free_ char *n = NULL; | |
4027 | int r; | |
4028 | ||
4029 | r = unit_name_to_prefix(u->id, &n); | |
4030 | if (r < 0) | |
4031 | return r; | |
4032 | ||
d0648cfe | 4033 | if (valid_user_group_name(n, 0)) { |
b012e921 | 4034 | *ret = TAKE_PTR(n); |
8a584da2 MP |
4035 | return 0; |
4036 | } | |
4037 | ||
4038 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
4039 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
4040 | return -ENOMEM; | |
4041 | ||
4042 | return 0; | |
4043 | } | |
4044 | ||
60f067b4 JS |
4045 | int unit_patch_contexts(Unit *u) { |
4046 | CGroupContext *cc; | |
4047 | ExecContext *ec; | |
14228c0d | 4048 | int r; |
663996b3 MS |
4049 | |
4050 | assert(u); | |
663996b3 | 4051 | |
60f067b4 JS |
4052 | /* Patch in the manager defaults into the exec and cgroup |
4053 | * contexts, _after_ the rest of the settings have been | |
4054 | * initialized */ | |
663996b3 | 4055 | |
60f067b4 JS |
4056 | ec = unit_get_exec_context(u); |
4057 | if (ec) { | |
4058 | /* This only copies in the ones that need memory */ | |
a032b68d | 4059 | for (unsigned i = 0; i < _RLIMIT_MAX; i++) |
60f067b4 JS |
4060 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { |
4061 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
4062 | if (!ec->rlimit[i]) | |
4063 | return -ENOMEM; | |
4064 | } | |
663996b3 | 4065 | |
aa27b158 | 4066 | if (MANAGER_IS_USER(u->manager) && |
60f067b4 | 4067 | !ec->working_directory) { |
663996b3 | 4068 | |
60f067b4 | 4069 | r = get_home_dir(&ec->working_directory); |
14228c0d MB |
4070 | if (r < 0) |
4071 | return r; | |
e735f4d4 MP |
4072 | |
4073 | /* Allow user services to run, even if the | |
4074 | * home directory is missing */ | |
4075 | ec->working_directory_missing_ok = true; | |
14228c0d | 4076 | } |
663996b3 | 4077 | |
60f067b4 | 4078 | if (ec->private_devices) |
8a584da2 MP |
4079 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
4080 | ||
4081 | if (ec->protect_kernel_modules) | |
4082 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
4083 | ||
e1f67bc7 MB |
4084 | if (ec->protect_kernel_logs) |
4085 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYSLOG); | |
4086 | ||
46cdbd49 BR |
4087 | if (ec->protect_clock) |
4088 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_SYS_TIME) | (UINT64_C(1) << CAP_WAKE_ALARM)); | |
4089 | ||
8a584da2 MP |
4090 | if (ec->dynamic_user) { |
4091 | if (!ec->user) { | |
4092 | r = user_from_unit_name(u, &ec->user); | |
4093 | if (r < 0) | |
4094 | return r; | |
4095 | } | |
4096 | ||
4097 | if (!ec->group) { | |
4098 | ec->group = strdup(ec->user); | |
4099 | if (!ec->group) | |
4100 | return -ENOMEM; | |
4101 | } | |
4102 | ||
bb4f798a MB |
4103 | /* If the dynamic user option is on, let's make sure that the unit can't leave its |
4104 | * UID/GID around in the file system or on IPC objects. Hence enforce a strict | |
4105 | * sandbox. */ | |
8a584da2 MP |
4106 | |
4107 | ec->private_tmp = true; | |
4108 | ec->remove_ipc = true; | |
4109 | ec->protect_system = PROTECT_SYSTEM_STRICT; | |
4110 | if (ec->protect_home == PROTECT_HOME_NO) | |
4111 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
bb4f798a MB |
4112 | |
4113 | /* Make sure this service can neither benefit from SUID/SGID binaries nor create | |
4114 | * them. */ | |
4115 | ec->no_new_privileges = true; | |
4116 | ec->restrict_suid_sgid = true; | |
8a584da2 | 4117 | } |
928cf965 MB |
4118 | |
4119 | for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) | |
4120 | exec_directory_sort(ec->directories + dt); | |
60f067b4 | 4121 | } |
663996b3 | 4122 | |
60f067b4 | 4123 | cc = unit_get_cgroup_context(u); |
6e866b33 | 4124 | if (cc && ec) { |
663996b3 | 4125 | |
6e866b33 | 4126 | if (ec->private_devices && |
e1f67bc7 MB |
4127 | cc->device_policy == CGROUP_DEVICE_POLICY_AUTO) |
4128 | cc->device_policy = CGROUP_DEVICE_POLICY_CLOSED; | |
6e866b33 | 4129 | |
2345c4ad LB |
4130 | /* Only add these if needed, as they imply that everything else is blocked. */ |
4131 | if (cc->device_policy != CGROUP_DEVICE_POLICY_AUTO || cc->device_allow) { | |
4132 | if (ec->root_image || ec->mount_images) { | |
4133 | ||
4134 | /* When RootImage= or MountImages= is specified, the following devices are touched. */ | |
4135 | FOREACH_STRING(p, "/dev/loop-control", "/dev/mapper/control") { | |
4136 | r = cgroup_add_device_allow(cc, p, "rw"); | |
4137 | if (r < 0) | |
4138 | return r; | |
4139 | } | |
4140 | FOREACH_STRING(p, "block-loop", "block-blkext", "block-device-mapper") { | |
4141 | r = cgroup_add_device_allow(cc, p, "rwm"); | |
4142 | if (r < 0) | |
4143 | return r; | |
4144 | } | |
6e866b33 | 4145 | |
2345c4ad LB |
4146 | /* Make sure "block-loop" can be resolved, i.e. make sure "loop" shows up in /proc/devices. |
4147 | * Same for mapper and verity. */ | |
4148 | FOREACH_STRING(p, "modprobe@loop.service", "modprobe@dm_mod.service", "modprobe@dm_verity.service") { | |
4149 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, p, true, UNIT_DEPENDENCY_FILE); | |
4150 | if (r < 0) | |
4151 | return r; | |
4152 | } | |
a10f5d05 | 4153 | } |
46cdbd49 | 4154 | |
2345c4ad LB |
4155 | if (ec->protect_clock) { |
4156 | r = cgroup_add_device_allow(cc, "char-rtc", "r"); | |
a10f5d05 MB |
4157 | if (r < 0) |
4158 | return r; | |
4159 | } | |
46cdbd49 | 4160 | } |
663996b3 MS |
4161 | } |
4162 | ||
4163 | return 0; | |
4164 | } | |
4165 | ||
5b5a102a | 4166 | ExecContext *unit_get_exec_context(const Unit *u) { |
663996b3 MS |
4167 | size_t offset; |
4168 | assert(u); | |
4169 | ||
60f067b4 JS |
4170 | if (u->type < 0) |
4171 | return NULL; | |
4172 | ||
663996b3 MS |
4173 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4174 | if (offset <= 0) | |
4175 | return NULL; | |
4176 | ||
4177 | return (ExecContext*) ((uint8_t*) u + offset); | |
4178 | } | |
4179 | ||
60f067b4 JS |
4180 | KillContext *unit_get_kill_context(Unit *u) { |
4181 | size_t offset; | |
4182 | assert(u); | |
4183 | ||
4184 | if (u->type < 0) | |
4185 | return NULL; | |
4186 | ||
4187 | offset = UNIT_VTABLE(u)->kill_context_offset; | |
4188 | if (offset <= 0) | |
4189 | return NULL; | |
4190 | ||
4191 | return (KillContext*) ((uint8_t*) u + offset); | |
4192 | } | |
4193 | ||
14228c0d MB |
4194 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4195 | size_t offset; | |
4196 | ||
60f067b4 JS |
4197 | if (u->type < 0) |
4198 | return NULL; | |
4199 | ||
14228c0d MB |
4200 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4201 | if (offset <= 0) | |
4202 | return NULL; | |
4203 | ||
4204 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4205 | } | |
4206 | ||
60f067b4 JS |
4207 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4208 | size_t offset; | |
4209 | ||
4210 | if (u->type < 0) | |
4211 | return NULL; | |
4212 | ||
4213 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4214 | if (offset <= 0) | |
4215 | return NULL; | |
4216 | ||
4217 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4218 | } | |
4219 | ||
52ad194e | 4220 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
d9dfd233 MP |
4221 | assert(u); |
4222 | ||
52ad194e | 4223 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
aa27b158 | 4224 | return NULL; |
663996b3 | 4225 | |
aa27b158 MP |
4226 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4227 | return u->manager->lookup_paths.transient; | |
d9dfd233 | 4228 | |
52ad194e | 4229 | if (flags & UNIT_PERSISTENT) |
aa27b158 | 4230 | return u->manager->lookup_paths.persistent_control; |
663996b3 | 4231 | |
52ad194e MB |
4232 | if (flags & UNIT_RUNTIME) |
4233 | return u->manager->lookup_paths.runtime_control; | |
4234 | ||
aa27b158 | 4235 | return NULL; |
663996b3 MS |
4236 | } |
4237 | ||
52ad194e | 4238 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
086111aa LB |
4239 | assert(!FLAGS_SET(flags, UNIT_ESCAPE_EXEC_SYNTAX | UNIT_ESCAPE_C)); |
4240 | ||
4241 | _cleanup_free_ char *t = NULL; | |
52ad194e MB |
4242 | |
4243 | if (!s) | |
4244 | return NULL; | |
4245 | ||
086111aa LB |
4246 | /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the |
4247 | * allocated return buffer pointer is also written to *buf, except if no escaping was necessary, in | |
4248 | * which case *buf is set to NULL, and the input pointer is returned as-is. This means the return | |
4249 | * value always contains a properly escaped version, but *buf when passed only contains a pointer if | |
4250 | * an allocation was necessary. If *buf is not specified, then the return value always needs to be | |
4251 | * freed. Callers can use this to optimize memory allocations. */ | |
52ad194e MB |
4252 | |
4253 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
086111aa LB |
4254 | t = specifier_escape(s); |
4255 | if (!t) | |
52ad194e MB |
4256 | return NULL; |
4257 | ||
086111aa | 4258 | s = t; |
52ad194e MB |
4259 | } |
4260 | ||
086111aa LB |
4261 | /* We either do c-escaping or shell-escaping, to additionally escape characters that we parse for |
4262 | * ExecStart= and friend, i.e. '$' and ';' and quotes. */ | |
4263 | ||
4264 | if (flags & UNIT_ESCAPE_EXEC_SYNTAX) { | |
4265 | char *t2 = shell_escape(s, "$;'\""); | |
4266 | if (!t2) | |
4267 | return NULL; | |
4268 | free_and_replace(t, t2); | |
4269 | ||
4270 | s = t; | |
52ad194e | 4271 | |
086111aa LB |
4272 | } else if (flags & UNIT_ESCAPE_C) { |
4273 | char *t2 = cescape(s); | |
4274 | if (!t2) | |
52ad194e | 4275 | return NULL; |
086111aa | 4276 | free_and_replace(t, t2); |
52ad194e | 4277 | |
086111aa | 4278 | s = t; |
52ad194e MB |
4279 | } |
4280 | ||
4281 | if (buf) { | |
086111aa LB |
4282 | *buf = TAKE_PTR(t); |
4283 | return (char*) s; | |
52ad194e MB |
4284 | } |
4285 | ||
086111aa | 4286 | return TAKE_PTR(t) ?: strdup(s); |
52ad194e MB |
4287 | } |
4288 | ||
4289 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4290 | _cleanup_free_ char *result = NULL; | |
8b3d4ff0 | 4291 | size_t n = 0; |
52ad194e | 4292 | |
086111aa LB |
4293 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command |
4294 | * lines in a way suitable for ExecStart= stanzas. */ | |
52ad194e MB |
4295 | |
4296 | STRV_FOREACH(i, l) { | |
4297 | _cleanup_free_ char *buf = NULL; | |
4298 | const char *p; | |
4299 | size_t a; | |
4300 | char *q; | |
4301 | ||
4302 | p = unit_escape_setting(*i, flags, &buf); | |
4303 | if (!p) | |
4304 | return NULL; | |
4305 | ||
4306 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
8b3d4ff0 | 4307 | if (!GREEDY_REALLOC(result, n + a + 1)) |
52ad194e MB |
4308 | return NULL; |
4309 | ||
4310 | q = result + n; | |
4311 | if (n > 0) | |
4312 | *(q++) = ' '; | |
4313 | ||
4314 | *(q++) = '"'; | |
4315 | q = stpcpy(q, p); | |
4316 | *(q++) = '"'; | |
4317 | ||
4318 | n += a; | |
4319 | } | |
4320 | ||
8b3d4ff0 | 4321 | if (!GREEDY_REALLOC(result, n + 1)) |
52ad194e MB |
4322 | return NULL; |
4323 | ||
4324 | result[n] = 0; | |
4325 | ||
b012e921 | 4326 | return TAKE_PTR(result); |
52ad194e MB |
4327 | } |
4328 | ||
4329 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4330 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
5a920b42 | 4331 | const char *dir, *wrapped; |
663996b3 MS |
4332 | int r; |
4333 | ||
4334 | assert(u); | |
52ad194e MB |
4335 | assert(name); |
4336 | assert(data); | |
4337 | ||
4338 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4339 | return 0; | |
4340 | ||
4341 | data = unit_escape_setting(data, flags, &escaped); | |
4342 | if (!data) | |
4343 | return -ENOMEM; | |
4344 | ||
4345 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4346 | * previous section header is the same */ | |
4347 | ||
4348 | if (flags & UNIT_PRIVATE) { | |
4349 | if (!UNIT_VTABLE(u)->private_section) | |
4350 | return -EINVAL; | |
4351 | ||
4352 | if (!u->transient_file || u->last_section_private < 0) | |
4353 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4354 | else if (u->last_section_private == 0) | |
4355 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4356 | } else { | |
4357 | if (!u->transient_file || u->last_section_private < 0) | |
4358 | data = strjoina("[Unit]\n", data); | |
4359 | else if (u->last_section_private > 0) | |
4360 | data = strjoina("\n[Unit]\n", data); | |
4361 | } | |
14228c0d | 4362 | |
aa27b158 MP |
4363 | if (u->transient_file) { |
4364 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4365 | * write to the transient unit file. */ | |
4366 | fputs(data, u->transient_file); | |
aa27b158 | 4367 | |
52ad194e MB |
4368 | if (!endswith(data, "\n")) |
4369 | fputc('\n', u->transient_file); | |
4370 | ||
4371 | /* Remember which section we wrote this entry to */ | |
4372 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
14228c0d | 4373 | return 0; |
52ad194e | 4374 | } |
663996b3 | 4375 | |
52ad194e | 4376 | dir = unit_drop_in_dir(u, flags); |
aa27b158 MP |
4377 | if (!dir) |
4378 | return -EINVAL; | |
4379 | ||
5a920b42 MP |
4380 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
4381 | "# or an equivalent operation. Do not edit.\n", | |
4382 | data, | |
4383 | "\n"); | |
663996b3 | 4384 | |
aa27b158 | 4385 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
f47781d8 MP |
4386 | if (r < 0) |
4387 | return r; | |
4388 | ||
52ad194e | 4389 | (void) mkdir_p_label(p, 0755); |
c5fca32e MB |
4390 | |
4391 | /* Make sure the drop-in dir is registered in our path cache. This way we don't need to stupidly | |
4392 | * recreate the cache after every drop-in we write. */ | |
4393 | if (u->manager->unit_path_cache) { | |
a10f5d05 | 4394 | r = set_put_strdup(&u->manager->unit_path_cache, p); |
c5fca32e MB |
4395 | if (r < 0) |
4396 | return r; | |
4397 | } | |
4398 | ||
5a920b42 | 4399 | r = write_string_file_atomic_label(q, wrapped); |
f47781d8 MP |
4400 | if (r < 0) |
4401 | return r; | |
4402 | ||
aa27b158 | 4403 | r = strv_push(&u->dropin_paths, q); |
f47781d8 MP |
4404 | if (r < 0) |
4405 | return r; | |
aa27b158 | 4406 | q = NULL; |
f47781d8 | 4407 | |
f47781d8 MP |
4408 | strv_uniq(u->dropin_paths); |
4409 | ||
4410 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4411 | ||
4412 | return 0; | |
663996b3 MS |
4413 | } |
4414 | ||
52ad194e | 4415 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
14228c0d MB |
4416 | _cleanup_free_ char *p = NULL; |
4417 | va_list ap; | |
4418 | int r; | |
4419 | ||
4420 | assert(u); | |
4421 | assert(name); | |
4422 | assert(format); | |
4423 | ||
52ad194e | 4424 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
14228c0d MB |
4425 | return 0; |
4426 | ||
4427 | va_start(ap, format); | |
4428 | r = vasprintf(&p, format, ap); | |
4429 | va_end(ap); | |
4430 | ||
4431 | if (r < 0) | |
4432 | return -ENOMEM; | |
4433 | ||
52ad194e | 4434 | return unit_write_setting(u, flags, name, p); |
14228c0d MB |
4435 | } |
4436 | ||
14228c0d | 4437 | int unit_make_transient(Unit *u) { |
52ad194e | 4438 | _cleanup_free_ char *path = NULL; |
aa27b158 | 4439 | FILE *f; |
aa27b158 | 4440 | |
14228c0d MB |
4441 | assert(u); |
4442 | ||
d9dfd233 MP |
4443 | if (!UNIT_VTABLE(u)->can_transient) |
4444 | return -EOPNOTSUPP; | |
4445 | ||
52ad194e MB |
4446 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4447 | ||
f2dec872 | 4448 | path = path_join(u->manager->lookup_paths.transient, u->id); |
aa27b158 MP |
4449 | if (!path) |
4450 | return -ENOMEM; | |
4451 | ||
4452 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4453 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4454 | ||
4455 | RUN_WITH_UMASK(0022) { | |
4456 | f = fopen(path, "we"); | |
52ad194e | 4457 | if (!f) |
aa27b158 | 4458 | return -errno; |
aa27b158 MP |
4459 | } |
4460 | ||
52ad194e | 4461 | safe_fclose(u->transient_file); |
aa27b158 MP |
4462 | u->transient_file = f; |
4463 | ||
52ad194e | 4464 | free_and_replace(u->fragment_path, path); |
db2df898 | 4465 | |
db2df898 MP |
4466 | u->source_path = mfree(u->source_path); |
4467 | u->dropin_paths = strv_free(u->dropin_paths); | |
4468 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4469 | ||
aa27b158 MP |
4470 | u->load_state = UNIT_STUB; |
4471 | u->load_error = 0; | |
4472 | u->transient = true; | |
4473 | ||
db2df898 MP |
4474 | unit_add_to_dbus_queue(u); |
4475 | unit_add_to_gc_queue(u); | |
14228c0d | 4476 | |
aa27b158 MP |
4477 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4478 | u->transient_file); | |
4479 | ||
d9dfd233 | 4480 | return 0; |
14228c0d MB |
4481 | } |
4482 | ||
bb4f798a | 4483 | static int log_kill(pid_t pid, int sig, void *userdata) { |
5a920b42 MP |
4484 | _cleanup_free_ char *comm = NULL; |
4485 | ||
4486 | (void) get_process_comm(pid, &comm); | |
4487 | ||
4488 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4489 | only, like for example systemd's own PAM stub process. */ | |
4490 | if (comm && comm[0] == '(') | |
bb4f798a | 4491 | return 0; |
5a920b42 MP |
4492 | |
4493 | log_unit_notice(userdata, | |
4494 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4495 | pid, | |
4496 | strna(comm), | |
4497 | signal_to_string(sig)); | |
bb4f798a MB |
4498 | |
4499 | return 1; | |
5a920b42 MP |
4500 | } |
4501 | ||
e1f67bc7 | 4502 | static int operation_to_signal(const KillContext *c, KillOperation k, bool *noteworthy) { |
5a920b42 MP |
4503 | assert(c); |
4504 | ||
4505 | switch (k) { | |
4506 | ||
4507 | case KILL_TERMINATE: | |
4508 | case KILL_TERMINATE_AND_LOG: | |
e1f67bc7 | 4509 | *noteworthy = false; |
5a920b42 MP |
4510 | return c->kill_signal; |
4511 | ||
e1f67bc7 MB |
4512 | case KILL_RESTART: |
4513 | *noteworthy = false; | |
4514 | return restart_kill_signal(c); | |
4515 | ||
5a920b42 | 4516 | case KILL_KILL: |
e1f67bc7 | 4517 | *noteworthy = true; |
6e866b33 | 4518 | return c->final_kill_signal; |
5a920b42 | 4519 | |
6e866b33 | 4520 | case KILL_WATCHDOG: |
e1f67bc7 | 4521 | *noteworthy = true; |
6e866b33 | 4522 | return c->watchdog_signal; |
5a920b42 MP |
4523 | |
4524 | default: | |
ea0999c9 | 4525 | assert_not_reached(); |
5a920b42 MP |
4526 | } |
4527 | } | |
4528 | ||
663996b3 MS |
4529 | int unit_kill_context( |
4530 | Unit *u, | |
4531 | KillContext *c, | |
5eef597e | 4532 | KillOperation k, |
663996b3 MS |
4533 | pid_t main_pid, |
4534 | pid_t control_pid, | |
4535 | bool main_pid_alien) { | |
4536 | ||
5a920b42 | 4537 | bool wait_for_exit = false, send_sighup; |
2897b343 | 4538 | cg_kill_log_func_t log_func = NULL; |
d9dfd233 | 4539 | int sig, r; |
663996b3 MS |
4540 | |
4541 | assert(u); | |
4542 | assert(c); | |
4543 | ||
a032b68d MB |
4544 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. Returns > 0 |
4545 | * if we killed something worth waiting for, 0 otherwise. Do not confuse with unit_kill_common() | |
4546 | * which is used for user-requested killing of unit processes. */ | |
5a920b42 | 4547 | |
663996b3 MS |
4548 | if (c->kill_mode == KILL_NONE) |
4549 | return 0; | |
4550 | ||
e1f67bc7 MB |
4551 | bool noteworthy; |
4552 | sig = operation_to_signal(c, k, ¬eworthy); | |
4553 | if (noteworthy) | |
4554 | log_func = log_kill; | |
5a920b42 MP |
4555 | |
4556 | send_sighup = | |
4557 | c->send_sighup && | |
4558 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4559 | sig != SIGHUP; | |
4560 | ||
663996b3 | 4561 | if (main_pid > 0) { |
5a920b42 MP |
4562 | if (log_func) |
4563 | log_func(main_pid, sig, u); | |
663996b3 | 4564 | |
5a920b42 | 4565 | r = kill_and_sigcont(main_pid, sig); |
663996b3 MS |
4566 | if (r < 0 && r != -ESRCH) { |
4567 | _cleanup_free_ char *comm = NULL; | |
5a920b42 | 4568 | (void) get_process_comm(main_pid, &comm); |
663996b3 | 4569 | |
d9dfd233 | 4570 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
14228c0d | 4571 | } else { |
60f067b4 JS |
4572 | if (!main_pid_alien) |
4573 | wait_for_exit = true; | |
14228c0d | 4574 | |
5a920b42 | 4575 | if (r != -ESRCH && send_sighup) |
d9dfd233 | 4576 | (void) kill(main_pid, SIGHUP); |
14228c0d | 4577 | } |
663996b3 MS |
4578 | } |
4579 | ||
4580 | if (control_pid > 0) { | |
5a920b42 MP |
4581 | if (log_func) |
4582 | log_func(control_pid, sig, u); | |
663996b3 | 4583 | |
5a920b42 | 4584 | r = kill_and_sigcont(control_pid, sig); |
663996b3 MS |
4585 | if (r < 0 && r != -ESRCH) { |
4586 | _cleanup_free_ char *comm = NULL; | |
5a920b42 | 4587 | (void) get_process_comm(control_pid, &comm); |
663996b3 | 4588 | |
d9dfd233 | 4589 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
14228c0d | 4590 | } else { |
663996b3 | 4591 | wait_for_exit = true; |
14228c0d | 4592 | |
5a920b42 | 4593 | if (r != -ESRCH && send_sighup) |
d9dfd233 | 4594 | (void) kill(control_pid, SIGHUP); |
14228c0d | 4595 | } |
663996b3 MS |
4596 | } |
4597 | ||
d9dfd233 MP |
4598 | if (u->cgroup_path && |
4599 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
663996b3 MS |
4600 | _cleanup_set_free_ Set *pid_set = NULL; |
4601 | ||
14228c0d MB |
4602 | /* Exclude the main/control pids from being killed via the cgroup */ |
4603 | pid_set = unit_pid_set(main_pid, control_pid); | |
663996b3 MS |
4604 | if (!pid_set) |
4605 | return -ENOMEM; | |
4606 | ||
5a920b42 MP |
4607 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4608 | sig, | |
4609 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4610 | pid_set, | |
4611 | log_func, u); | |
663996b3 | 4612 | if (r < 0) { |
f5e65279 | 4613 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
9d669329 | 4614 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", empty_to_root(u->cgroup_path)); |
60f067b4 | 4615 | |
d9dfd233 | 4616 | } else if (r > 0) { |
60f067b4 | 4617 | |
98393f85 MB |
4618 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4619 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
4620 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
4621 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
4622 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
4623 | * there we get proper events. Hence rely on them. */ | |
d9dfd233 | 4624 | |
2897b343 | 4625 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
98393f85 | 4626 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
d9dfd233 | 4627 | wait_for_exit = true; |
60f067b4 | 4628 | |
5a920b42 | 4629 | if (send_sighup) { |
14228c0d MB |
4630 | set_free(pid_set); |
4631 | ||
4632 | pid_set = unit_pid_set(main_pid, control_pid); | |
4633 | if (!pid_set) | |
4634 | return -ENOMEM; | |
4635 | ||
a10f5d05 MB |
4636 | (void) cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4637 | SIGHUP, | |
4638 | CGROUP_IGNORE_SELF, | |
4639 | pid_set, | |
4640 | NULL, NULL); | |
14228c0d MB |
4641 | } |
4642 | } | |
663996b3 MS |
4643 | } |
4644 | ||
4645 | return wait_for_exit; | |
4646 | } | |
4647 | ||
52ad194e | 4648 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
14228c0d MB |
4649 | int r; |
4650 | ||
4651 | assert(u); | |
4652 | assert(path); | |
4653 | ||
626cb2db MB |
4654 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these |
4655 | * paths in the unit (from the path to the UnitDependencyInfo structure indicating how to the | |
4656 | * dependency came to be). However, we build a prefix table for all possible prefixes so that new | |
4657 | * appearing mount units can easily determine which units to make themselves a dependency of. */ | |
14228c0d | 4658 | |
60f067b4 JS |
4659 | if (!path_is_absolute(path)) |
4660 | return -EINVAL; | |
4661 | ||
626cb2db MB |
4662 | if (hashmap_contains(u->requires_mounts_for, path)) /* Exit quickly if the path is already covered. */ |
4663 | return 0; | |
52ad194e | 4664 | |
626cb2db | 4665 | _cleanup_free_ char *p = strdup(path); |
14228c0d MB |
4666 | if (!p) |
4667 | return -ENOMEM; | |
4668 | ||
626cb2db MB |
4669 | /* Use the canonical form of the path as the stored key. We call path_is_normalized() |
4670 | * only after simplification, since path_is_normalized() rejects paths with '.'. | |
4671 | * path_is_normalized() also verifies that the path fits in PATH_MAX. */ | |
8b3d4ff0 | 4672 | path = path_simplify(p); |
14228c0d | 4673 | |
b012e921 | 4674 | if (!path_is_normalized(path)) |
14228c0d | 4675 | return -EPERM; |
14228c0d | 4676 | |
626cb2db | 4677 | UnitDependencyInfo di = { |
52ad194e MB |
4678 | .origin_mask = mask |
4679 | }; | |
4680 | ||
626cb2db | 4681 | r = hashmap_ensure_put(&u->requires_mounts_for, &path_hash_ops, p, di.data); |
b012e921 | 4682 | if (r < 0) |
14228c0d | 4683 | return r; |
626cb2db MB |
4684 | assert(r > 0); |
4685 | TAKE_PTR(p); /* path remains a valid pointer to the string stored in the hashmap */ | |
14228c0d | 4686 | |
6e866b33 | 4687 | char prefix[strlen(path) + 1]; |
b012e921 | 4688 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
14228c0d MB |
4689 | Set *x; |
4690 | ||
4691 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4692 | if (!x) { | |
b012e921 | 4693 | _cleanup_free_ char *q = NULL; |
14228c0d | 4694 | |
98393f85 | 4695 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
e3bff60a MP |
4696 | if (r < 0) |
4697 | return r; | |
14228c0d MB |
4698 | |
4699 | q = strdup(prefix); | |
4700 | if (!q) | |
4701 | return -ENOMEM; | |
4702 | ||
5eef597e | 4703 | x = set_new(NULL); |
b012e921 | 4704 | if (!x) |
14228c0d | 4705 | return -ENOMEM; |
14228c0d MB |
4706 | |
4707 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4708 | if (r < 0) { | |
14228c0d MB |
4709 | set_free(x); |
4710 | return r; | |
4711 | } | |
b012e921 | 4712 | q = NULL; |
14228c0d MB |
4713 | } |
4714 | ||
4715 | r = set_put(x, u); | |
4716 | if (r < 0) | |
4717 | return r; | |
4718 | } | |
4719 | ||
4720 | return 0; | |
4721 | } | |
4722 | ||
60f067b4 JS |
4723 | int unit_setup_exec_runtime(Unit *u) { |
4724 | ExecRuntime **rt; | |
4725 | size_t offset; | |
60f067b4 | 4726 | Unit *other; |
98393f85 | 4727 | int r; |
60f067b4 JS |
4728 | |
4729 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4730 | assert(offset > 0); | |
4731 | ||
5eef597e | 4732 | /* Check if there already is an ExecRuntime for this unit? */ |
60f067b4 JS |
4733 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
4734 | if (*rt) | |
4735 | return 0; | |
4736 | ||
4737 | /* Try to get it from somebody else */ | |
8b3d4ff0 | 4738 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_JOINS_NAMESPACE_OF) { |
98393f85 MB |
4739 | r = exec_runtime_acquire(u->manager, NULL, other->id, false, rt); |
4740 | if (r == 1) | |
4741 | return 1; | |
60f067b4 JS |
4742 | } |
4743 | ||
98393f85 | 4744 | return exec_runtime_acquire(u->manager, unit_get_exec_context(u), u->id, true, rt); |
60f067b4 JS |
4745 | } |
4746 | ||
8a584da2 MP |
4747 | int unit_setup_dynamic_creds(Unit *u) { |
4748 | ExecContext *ec; | |
4749 | DynamicCreds *dcreds; | |
4750 | size_t offset; | |
4751 | ||
4752 | assert(u); | |
4753 | ||
4754 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
4755 | assert(offset > 0); | |
4756 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
4757 | ||
4758 | ec = unit_get_exec_context(u); | |
4759 | assert(ec); | |
4760 | ||
4761 | if (!ec->dynamic_user) | |
4762 | return 0; | |
4763 | ||
4764 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
4765 | } | |
4766 | ||
e3bff60a MP |
4767 | bool unit_type_supported(UnitType t) { |
4768 | if (_unlikely_(t < 0)) | |
4769 | return false; | |
4770 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
4771 | return false; | |
4772 | ||
4773 | if (!unit_vtable[t]->supported) | |
4774 | return true; | |
4775 | ||
4776 | return unit_vtable[t]->supported(); | |
4777 | } | |
4778 | ||
4779 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { | |
4780 | int r; | |
4781 | ||
4782 | assert(u); | |
4783 | assert(where); | |
4784 | ||
5b5a102a MB |
4785 | if (!unit_log_level_test(u, LOG_NOTICE)) |
4786 | return; | |
4787 | ||
8f232108 | 4788 | r = dir_is_empty(where, /* ignore_hidden_or_backup= */ false); |
98393f85 | 4789 | if (r > 0 || r == -ENOTDIR) |
e3bff60a MP |
4790 | return; |
4791 | if (r < 0) { | |
4792 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
4793 | return; | |
4794 | } | |
4795 | ||
5b5a102a MB |
4796 | log_unit_struct(u, LOG_NOTICE, |
4797 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
4798 | LOG_UNIT_INVOCATION_ID(u), | |
4799 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
4800 | "WHERE=%s", where); | |
e3bff60a MP |
4801 | } |
4802 | ||
1d42b86d | 4803 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
6e866b33 | 4804 | _cleanup_free_ char *canonical_where = NULL; |
e3bff60a MP |
4805 | int r; |
4806 | ||
4807 | assert(u); | |
4808 | assert(where); | |
4809 | ||
e1f67bc7 | 4810 | r = chase_symlinks(where, NULL, CHASE_NONEXISTENT, &canonical_where, NULL); |
e3bff60a | 4811 | if (r < 0) { |
1d42b86d | 4812 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
e3bff60a MP |
4813 | return 0; |
4814 | } | |
1d42b86d MB |
4815 | |
4816 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
4817 | if (path_equal(where, canonical_where)) | |
e3bff60a MP |
4818 | return 0; |
4819 | ||
1d42b86d | 4820 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
5b5a102a MB |
4821 | log_unit_struct(u, LOG_ERR, |
4822 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
4823 | LOG_UNIT_INVOCATION_ID(u), | |
4824 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), | |
4825 | "WHERE=%s", where); | |
e3bff60a MP |
4826 | |
4827 | return -ELOOP; | |
4828 | } | |
db2df898 MP |
4829 | |
4830 | bool unit_is_pristine(Unit *u) { | |
4831 | assert(u); | |
4832 | ||
086111aa LB |
4833 | /* Check if the unit already exists or is already around, in a number of different ways. Note that to |
4834 | * cater for unit types such as slice, we are generally fine with units that are marked UNIT_LOADED | |
4835 | * even though nothing was actually loaded, as those unit types don't require a file on disk. | |
4836 | * | |
4837 | * Note that we don't check for drop-ins here, because we allow drop-ins for transient units | |
4838 | * identically to non-transient units, both unit-specific and hierarchical. E.g. for a-b-c.service: | |
4839 | * service.d/….conf, a-.service.d/….conf, a-b-.service.d/….conf, a-b-c.service.d/….conf. | |
4840 | */ | |
db2df898 | 4841 | |
086111aa LB |
4842 | return IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) && |
4843 | !u->fragment_path && | |
4844 | !u->source_path && | |
4845 | !u->job && | |
4846 | !u->merged_into; | |
db2df898 | 4847 | } |
aa27b158 MP |
4848 | |
4849 | pid_t unit_control_pid(Unit *u) { | |
4850 | assert(u); | |
4851 | ||
4852 | if (UNIT_VTABLE(u)->control_pid) | |
4853 | return UNIT_VTABLE(u)->control_pid(u); | |
4854 | ||
4855 | return 0; | |
4856 | } | |
4857 | ||
4858 | pid_t unit_main_pid(Unit *u) { | |
4859 | assert(u); | |
4860 | ||
4861 | if (UNIT_VTABLE(u)->main_pid) | |
4862 | return UNIT_VTABLE(u)->main_pid(u); | |
4863 | ||
4864 | return 0; | |
4865 | } | |
8a584da2 MP |
4866 | |
4867 | static void unit_unref_uid_internal( | |
4868 | Unit *u, | |
4869 | uid_t *ref_uid, | |
4870 | bool destroy_now, | |
4871 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
4872 | ||
4873 | assert(u); | |
4874 | assert(ref_uid); | |
4875 | assert(_manager_unref_uid); | |
4876 | ||
4877 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
4878 | * gid_t are actually the same time, with the same validity rules. | |
4879 | * | |
4880 | * Drops a reference to UID/GID from a unit. */ | |
4881 | ||
4882 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4883 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4884 | ||
4885 | if (!uid_is_valid(*ref_uid)) | |
4886 | return; | |
4887 | ||
4888 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
4889 | *ref_uid = UID_INVALID; | |
4890 | } | |
4891 | ||
46cdbd49 | 4892 | static void unit_unref_uid(Unit *u, bool destroy_now) { |
8a584da2 MP |
4893 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); |
4894 | } | |
4895 | ||
46cdbd49 | 4896 | static void unit_unref_gid(Unit *u, bool destroy_now) { |
8a584da2 MP |
4897 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); |
4898 | } | |
4899 | ||
46cdbd49 BR |
4900 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { |
4901 | assert(u); | |
4902 | ||
4903 | unit_unref_uid(u, destroy_now); | |
4904 | unit_unref_gid(u, destroy_now); | |
4905 | } | |
4906 | ||
8a584da2 MP |
4907 | static int unit_ref_uid_internal( |
4908 | Unit *u, | |
4909 | uid_t *ref_uid, | |
4910 | uid_t uid, | |
4911 | bool clean_ipc, | |
4912 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
4913 | ||
4914 | int r; | |
4915 | ||
4916 | assert(u); | |
4917 | assert(ref_uid); | |
4918 | assert(uid_is_valid(uid)); | |
4919 | assert(_manager_ref_uid); | |
4920 | ||
4921 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
4922 | * are actually the same type, and have the same validity rules. | |
4923 | * | |
4924 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
4925 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
4926 | * drops to zero. */ | |
4927 | ||
4928 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4929 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4930 | ||
4931 | if (*ref_uid == uid) | |
4932 | return 0; | |
4933 | ||
4934 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
4935 | return -EBUSY; | |
4936 | ||
4937 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
4938 | if (r < 0) | |
4939 | return r; | |
4940 | ||
4941 | *ref_uid = uid; | |
4942 | return 1; | |
4943 | } | |
4944 | ||
46cdbd49 | 4945 | static int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { |
8a584da2 MP |
4946 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); |
4947 | } | |
4948 | ||
46cdbd49 | 4949 | static int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { |
8a584da2 MP |
4950 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); |
4951 | } | |
4952 | ||
4953 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
4954 | int r = 0, q = 0; | |
4955 | ||
4956 | assert(u); | |
4957 | ||
4958 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
4959 | ||
4960 | if (uid_is_valid(uid)) { | |
4961 | r = unit_ref_uid(u, uid, clean_ipc); | |
4962 | if (r < 0) | |
4963 | return r; | |
4964 | } | |
4965 | ||
4966 | if (gid_is_valid(gid)) { | |
4967 | q = unit_ref_gid(u, gid, clean_ipc); | |
4968 | if (q < 0) { | |
4969 | if (r > 0) | |
4970 | unit_unref_uid(u, false); | |
4971 | ||
4972 | return q; | |
4973 | } | |
4974 | } | |
4975 | ||
4976 | return r > 0 || q > 0; | |
4977 | } | |
4978 | ||
4979 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
4980 | ExecContext *c; | |
4981 | int r; | |
4982 | ||
4983 | assert(u); | |
4984 | ||
4985 | c = unit_get_exec_context(u); | |
4986 | ||
4987 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
4988 | if (r < 0) | |
4989 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
4990 | ||
4991 | return r; | |
4992 | } | |
4993 | ||
8a584da2 MP |
4994 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { |
4995 | int r; | |
4996 | ||
4997 | assert(u); | |
4998 | ||
4999 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
5000 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
5001 | * objects when no service references the UID/GID anymore. */ | |
5002 | ||
5003 | r = unit_ref_uid_gid(u, uid, gid); | |
5004 | if (r > 0) | |
6e866b33 | 5005 | unit_add_to_dbus_queue(u); |
8a584da2 MP |
5006 | } |
5007 | ||
8a584da2 MP |
5008 | int unit_acquire_invocation_id(Unit *u) { |
5009 | sd_id128_t id; | |
5010 | int r; | |
5011 | ||
5012 | assert(u); | |
5013 | ||
5014 | r = sd_id128_randomize(&id); | |
5015 | if (r < 0) | |
5016 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
5017 | ||
5018 | r = unit_set_invocation_id(u, id); | |
5019 | if (r < 0) | |
5020 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
5021 | ||
6e866b33 | 5022 | unit_add_to_dbus_queue(u); |
8a584da2 MP |
5023 | return 0; |
5024 | } | |
f5e65279 | 5025 | |
6e866b33 MB |
5026 | int unit_set_exec_params(Unit *u, ExecParameters *p) { |
5027 | int r; | |
5028 | ||
f5e65279 MB |
5029 | assert(u); |
5030 | assert(p); | |
5031 | ||
98393f85 | 5032 | /* Copy parameters from manager */ |
6e866b33 MB |
5033 | r = manager_get_effective_environment(u->manager, &p->environment); |
5034 | if (r < 0) | |
5035 | return r; | |
5036 | ||
98393f85 MB |
5037 | p->confirm_spawn = manager_get_confirm_spawn(u->manager); |
5038 | p->cgroup_supported = u->manager->cgroup_supported; | |
5039 | p->prefix = u->manager->prefix; | |
5040 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
5041 | ||
f2dec872 | 5042 | /* Copy parameters from unit */ |
f5e65279 | 5043 | p->cgroup_path = u->cgroup_path; |
98393f85 | 5044 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
6e866b33 | 5045 | |
8f232108 MB |
5046 | p->received_credentials_directory = u->manager->received_credentials_directory; |
5047 | p->received_encrypted_credentials_directory = u->manager->received_encrypted_credentials_directory; | |
a032b68d | 5048 | |
6e866b33 | 5049 | return 0; |
f5e65279 MB |
5050 | } |
5051 | ||
1d42b86d | 5052 | int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) { |
f5e65279 MB |
5053 | int r; |
5054 | ||
5055 | assert(u); | |
5056 | assert(ret); | |
5057 | ||
5058 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
5059 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
5060 | ||
5061 | (void) unit_realize_cgroup(u); | |
5062 | ||
1d42b86d MB |
5063 | r = safe_fork(name, FORK_REOPEN_LOG, ret); |
5064 | if (r != 0) | |
5065 | return r; | |
f5e65279 | 5066 | |
3a6ce677 BR |
5067 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE); |
5068 | (void) ignore_signals(SIGPIPE); | |
f5e65279 | 5069 | |
1d42b86d | 5070 | (void) prctl(PR_SET_PDEATHSIG, SIGTERM); |
f5e65279 | 5071 | |
1d42b86d MB |
5072 | if (u->cgroup_path) { |
5073 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
5074 | if (r < 0) { | |
9d669329 | 5075 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", empty_to_root(u->cgroup_path)); |
1d42b86d | 5076 | _exit(EXIT_CGROUP); |
f5e65279 | 5077 | } |
f5e65279 MB |
5078 | } |
5079 | ||
1d42b86d | 5080 | return 0; |
f5e65279 | 5081 | } |
52ad194e | 5082 | |
e1f67bc7 MB |
5083 | int unit_fork_and_watch_rm_rf(Unit *u, char **paths, pid_t *ret_pid) { |
5084 | pid_t pid; | |
5085 | int r; | |
5086 | ||
5087 | assert(u); | |
5088 | assert(ret_pid); | |
5089 | ||
5090 | r = unit_fork_helper_process(u, "(sd-rmrf)", &pid); | |
5091 | if (r < 0) | |
5092 | return r; | |
5093 | if (r == 0) { | |
5094 | int ret = EXIT_SUCCESS; | |
e1f67bc7 MB |
5095 | |
5096 | STRV_FOREACH(i, paths) { | |
5097 | r = rm_rf(*i, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_MISSING_OK); | |
5098 | if (r < 0) { | |
5099 | log_error_errno(r, "Failed to remove '%s': %m", *i); | |
5100 | ret = EXIT_FAILURE; | |
5101 | } | |
5102 | } | |
5103 | ||
5104 | _exit(ret); | |
5105 | } | |
5106 | ||
5107 | r = unit_watch_pid(u, pid, true); | |
5108 | if (r < 0) | |
5109 | return r; | |
5110 | ||
5111 | *ret_pid = pid; | |
5112 | return 0; | |
5113 | } | |
5114 | ||
8b3d4ff0 MB |
5115 | static void unit_update_dependency_mask(Hashmap *deps, Unit *other, UnitDependencyInfo di) { |
5116 | assert(deps); | |
52ad194e MB |
5117 | assert(other); |
5118 | ||
8b3d4ff0 | 5119 | if (di.origin_mask == 0 && di.destination_mask == 0) |
52ad194e | 5120 | /* No bit set anymore, let's drop the whole entry */ |
8b3d4ff0 MB |
5121 | assert_se(hashmap_remove(deps, other)); |
5122 | else | |
52ad194e | 5123 | /* Mask was reduced, let's update the entry */ |
8b3d4ff0 | 5124 | assert_se(hashmap_update(deps, other, di.data) == 0); |
52ad194e MB |
5125 | } |
5126 | ||
5127 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
8b3d4ff0 | 5128 | Hashmap *deps; |
52ad194e MB |
5129 | assert(u); |
5130 | ||
5131 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5132 | ||
5133 | if (mask == 0) | |
5134 | return; | |
5135 | ||
8b3d4ff0 | 5136 | HASHMAP_FOREACH(deps, u->dependencies) { |
52ad194e MB |
5137 | bool done; |
5138 | ||
5139 | do { | |
5140 | UnitDependencyInfo di; | |
5141 | Unit *other; | |
52ad194e MB |
5142 | |
5143 | done = true; | |
5144 | ||
8b3d4ff0 MB |
5145 | HASHMAP_FOREACH_KEY(di.data, other, deps) { |
5146 | Hashmap *other_deps; | |
5147 | ||
a032b68d | 5148 | if (FLAGS_SET(~mask, di.origin_mask)) |
52ad194e | 5149 | continue; |
8b3d4ff0 | 5150 | |
52ad194e | 5151 | di.origin_mask &= ~mask; |
8b3d4ff0 | 5152 | unit_update_dependency_mask(deps, other, di); |
52ad194e | 5153 | |
8b3d4ff0 MB |
5154 | /* We updated the dependency from our unit to the other unit now. But most |
5155 | * dependencies imply a reverse dependency. Hence, let's delete that one | |
5156 | * too. For that we go through all dependency types on the other unit and | |
5157 | * delete all those which point to us and have the right mask set. */ | |
52ad194e | 5158 | |
8b3d4ff0 | 5159 | HASHMAP_FOREACH(other_deps, other->dependencies) { |
52ad194e MB |
5160 | UnitDependencyInfo dj; |
5161 | ||
8b3d4ff0 | 5162 | dj.data = hashmap_get(other_deps, u); |
a032b68d | 5163 | if (FLAGS_SET(~mask, dj.destination_mask)) |
52ad194e | 5164 | continue; |
52ad194e | 5165 | |
8b3d4ff0 MB |
5166 | dj.destination_mask &= ~mask; |
5167 | unit_update_dependency_mask(other_deps, u, dj); | |
52ad194e MB |
5168 | } |
5169 | ||
5170 | unit_add_to_gc_queue(other); | |
5171 | ||
086111aa LB |
5172 | /* The unit 'other' may not be wanted by the unit 'u'. */ |
5173 | unit_submit_to_stop_when_unneeded_queue(other); | |
5174 | ||
52ad194e MB |
5175 | done = false; |
5176 | break; | |
5177 | } | |
5178 | ||
5179 | } while (!done); | |
5180 | } | |
5181 | } | |
5182 | ||
46cdbd49 BR |
5183 | static int unit_get_invocation_path(Unit *u, char **ret) { |
5184 | char *p; | |
5185 | int r; | |
5186 | ||
5187 | assert(u); | |
5188 | assert(ret); | |
5189 | ||
5190 | if (MANAGER_IS_SYSTEM(u->manager)) | |
5191 | p = strjoin("/run/systemd/units/invocation:", u->id); | |
5192 | else { | |
5193 | _cleanup_free_ char *user_path = NULL; | |
5194 | r = xdg_user_runtime_dir(&user_path, "/systemd/units/invocation:"); | |
5195 | if (r < 0) | |
5196 | return r; | |
5197 | p = strjoin(user_path, u->id); | |
5198 | } | |
5199 | ||
5200 | if (!p) | |
5201 | return -ENOMEM; | |
5202 | ||
5203 | *ret = p; | |
5204 | return 0; | |
5205 | } | |
5206 | ||
52ad194e | 5207 | static int unit_export_invocation_id(Unit *u) { |
46cdbd49 | 5208 | _cleanup_free_ char *p = NULL; |
52ad194e MB |
5209 | int r; |
5210 | ||
5211 | assert(u); | |
5212 | ||
5213 | if (u->exported_invocation_id) | |
5214 | return 0; | |
5215 | ||
5216 | if (sd_id128_is_null(u->invocation_id)) | |
5217 | return 0; | |
5218 | ||
46cdbd49 BR |
5219 | r = unit_get_invocation_path(u, &p); |
5220 | if (r < 0) | |
5221 | return log_unit_debug_errno(u, r, "Failed to get invocation path: %m"); | |
5222 | ||
a032b68d | 5223 | r = symlink_atomic_label(u->invocation_id_string, p); |
52ad194e MB |
5224 | if (r < 0) |
5225 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5226 | ||
5227 | u->exported_invocation_id = true; | |
5228 | return 0; | |
5229 | } | |
5230 | ||
5231 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5232 | const char *p; | |
5233 | char buf[2]; | |
5234 | int r; | |
5235 | ||
5236 | assert(u); | |
5237 | assert(c); | |
5238 | ||
5239 | if (u->exported_log_level_max) | |
5240 | return 0; | |
5241 | ||
5242 | if (c->log_level_max < 0) | |
5243 | return 0; | |
5244 | ||
5245 | assert(c->log_level_max <= 7); | |
5246 | ||
5247 | buf[0] = '0' + c->log_level_max; | |
5248 | buf[1] = 0; | |
5249 | ||
5250 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5251 | r = symlink_atomic(buf, p); | |
5252 | if (r < 0) | |
5253 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5254 | ||
5255 | u->exported_log_level_max = true; | |
5256 | return 0; | |
5257 | } | |
5258 | ||
5259 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5260 | _cleanup_close_ int fd = -1; | |
5261 | struct iovec *iovec; | |
5262 | const char *p; | |
5263 | char *pattern; | |
5264 | le64_t *sizes; | |
5265 | ssize_t n; | |
52ad194e MB |
5266 | int r; |
5267 | ||
5268 | if (u->exported_log_extra_fields) | |
5269 | return 0; | |
5270 | ||
5271 | if (c->n_log_extra_fields <= 0) | |
5272 | return 0; | |
5273 | ||
5274 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5275 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5276 | ||
a032b68d | 5277 | for (size_t i = 0; i < c->n_log_extra_fields; i++) { |
52ad194e MB |
5278 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); |
5279 | ||
5280 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5281 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5282 | } | |
5283 | ||
5284 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5285 | pattern = strjoina(p, ".XXXXXX"); | |
5286 | ||
5287 | fd = mkostemp_safe(pattern); | |
5288 | if (fd < 0) | |
5289 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5290 | ||
5291 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5292 | if (n < 0) { | |
5293 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5294 | goto fail; | |
5295 | } | |
5296 | ||
5297 | (void) fchmod(fd, 0644); | |
5298 | ||
5299 | if (rename(pattern, p) < 0) { | |
5300 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5301 | goto fail; | |
5302 | } | |
5303 | ||
5304 | u->exported_log_extra_fields = true; | |
5305 | return 0; | |
5306 | ||
5307 | fail: | |
5308 | (void) unlink(pattern); | |
5309 | return r; | |
5310 | } | |
5311 | ||
e1f67bc7 | 5312 | static int unit_export_log_ratelimit_interval(Unit *u, const ExecContext *c) { |
6e866b33 MB |
5313 | _cleanup_free_ char *buf = NULL; |
5314 | const char *p; | |
5315 | int r; | |
5316 | ||
5317 | assert(u); | |
5318 | assert(c); | |
5319 | ||
e1f67bc7 | 5320 | if (u->exported_log_ratelimit_interval) |
6e866b33 MB |
5321 | return 0; |
5322 | ||
e1f67bc7 | 5323 | if (c->log_ratelimit_interval_usec == 0) |
6e866b33 MB |
5324 | return 0; |
5325 | ||
5326 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5327 | ||
e1f67bc7 | 5328 | if (asprintf(&buf, "%" PRIu64, c->log_ratelimit_interval_usec) < 0) |
6e866b33 MB |
5329 | return log_oom(); |
5330 | ||
5331 | r = symlink_atomic(buf, p); | |
5332 | if (r < 0) | |
5333 | return log_unit_debug_errno(u, r, "Failed to create log rate limit interval symlink %s: %m", p); | |
5334 | ||
e1f67bc7 | 5335 | u->exported_log_ratelimit_interval = true; |
6e866b33 MB |
5336 | return 0; |
5337 | } | |
5338 | ||
e1f67bc7 | 5339 | static int unit_export_log_ratelimit_burst(Unit *u, const ExecContext *c) { |
6e866b33 MB |
5340 | _cleanup_free_ char *buf = NULL; |
5341 | const char *p; | |
5342 | int r; | |
5343 | ||
5344 | assert(u); | |
5345 | assert(c); | |
5346 | ||
e1f67bc7 | 5347 | if (u->exported_log_ratelimit_burst) |
6e866b33 MB |
5348 | return 0; |
5349 | ||
e1f67bc7 | 5350 | if (c->log_ratelimit_burst == 0) |
6e866b33 MB |
5351 | return 0; |
5352 | ||
5353 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5354 | ||
e1f67bc7 | 5355 | if (asprintf(&buf, "%u", c->log_ratelimit_burst) < 0) |
6e866b33 MB |
5356 | return log_oom(); |
5357 | ||
5358 | r = symlink_atomic(buf, p); | |
5359 | if (r < 0) | |
5360 | return log_unit_debug_errno(u, r, "Failed to create log rate limit burst symlink %s: %m", p); | |
5361 | ||
e1f67bc7 | 5362 | u->exported_log_ratelimit_burst = true; |
6e866b33 MB |
5363 | return 0; |
5364 | } | |
5365 | ||
52ad194e MB |
5366 | void unit_export_state_files(Unit *u) { |
5367 | const ExecContext *c; | |
5368 | ||
5369 | assert(u); | |
5370 | ||
5371 | if (!u->id) | |
5372 | return; | |
5373 | ||
6e866b33 | 5374 | if (MANAGER_IS_TEST_RUN(u->manager)) |
b012e921 MB |
5375 | return; |
5376 | ||
52ad194e MB |
5377 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5378 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5379 | * the IPC system itself and PID 1 also log to the journal. | |
5380 | * | |
5381 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5382 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5383 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5384 | * namespace at least. | |
5385 | * | |
5386 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5387 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5388 | * them with one. */ | |
5389 | ||
5390 | (void) unit_export_invocation_id(u); | |
5391 | ||
46cdbd49 BR |
5392 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5393 | return; | |
5394 | ||
52ad194e MB |
5395 | c = unit_get_exec_context(u); |
5396 | if (c) { | |
5397 | (void) unit_export_log_level_max(u, c); | |
5398 | (void) unit_export_log_extra_fields(u, c); | |
e1f67bc7 MB |
5399 | (void) unit_export_log_ratelimit_interval(u, c); |
5400 | (void) unit_export_log_ratelimit_burst(u, c); | |
52ad194e MB |
5401 | } |
5402 | } | |
5403 | ||
5404 | void unit_unlink_state_files(Unit *u) { | |
5405 | const char *p; | |
5406 | ||
5407 | assert(u); | |
5408 | ||
5409 | if (!u->id) | |
5410 | return; | |
5411 | ||
52ad194e MB |
5412 | /* Undoes the effect of unit_export_state() */ |
5413 | ||
5414 | if (u->exported_invocation_id) { | |
46cdbd49 BR |
5415 | _cleanup_free_ char *invocation_path = NULL; |
5416 | int r = unit_get_invocation_path(u, &invocation_path); | |
5417 | if (r >= 0) { | |
5418 | (void) unlink(invocation_path); | |
5419 | u->exported_invocation_id = false; | |
5420 | } | |
52ad194e MB |
5421 | } |
5422 | ||
46cdbd49 BR |
5423 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5424 | return; | |
5425 | ||
52ad194e MB |
5426 | if (u->exported_log_level_max) { |
5427 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5428 | (void) unlink(p); | |
5429 | ||
5430 | u->exported_log_level_max = false; | |
5431 | } | |
5432 | ||
5433 | if (u->exported_log_extra_fields) { | |
5434 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5435 | (void) unlink(p); | |
5436 | ||
5437 | u->exported_log_extra_fields = false; | |
5438 | } | |
6e866b33 | 5439 | |
e1f67bc7 | 5440 | if (u->exported_log_ratelimit_interval) { |
6e866b33 MB |
5441 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); |
5442 | (void) unlink(p); | |
5443 | ||
e1f67bc7 | 5444 | u->exported_log_ratelimit_interval = false; |
6e866b33 MB |
5445 | } |
5446 | ||
e1f67bc7 | 5447 | if (u->exported_log_ratelimit_burst) { |
6e866b33 MB |
5448 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); |
5449 | (void) unlink(p); | |
5450 | ||
e1f67bc7 | 5451 | u->exported_log_ratelimit_burst = false; |
6e866b33 | 5452 | } |
52ad194e MB |
5453 | } |
5454 | ||
5455 | int unit_prepare_exec(Unit *u) { | |
5456 | int r; | |
5457 | ||
5458 | assert(u); | |
5459 | ||
f2dec872 BR |
5460 | /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable. |
5461 | * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */ | |
5462 | r = bpf_firewall_load_custom(u); | |
5463 | if (r < 0) | |
5464 | return r; | |
5465 | ||
52ad194e MB |
5466 | /* Prepares everything so that we can fork of a process for this unit */ |
5467 | ||
5468 | (void) unit_realize_cgroup(u); | |
5469 | ||
5470 | if (u->reset_accounting) { | |
f2dec872 | 5471 | (void) unit_reset_accounting(u); |
52ad194e MB |
5472 | u->reset_accounting = false; |
5473 | } | |
5474 | ||
5475 | unit_export_state_files(u); | |
5476 | ||
5477 | r = unit_setup_exec_runtime(u); | |
5478 | if (r < 0) | |
5479 | return r; | |
5480 | ||
5481 | r = unit_setup_dynamic_creds(u); | |
5482 | if (r < 0) | |
5483 | return r; | |
5484 | ||
5485 | return 0; | |
5486 | } | |
5487 | ||
a10f5d05 MB |
5488 | static bool ignore_leftover_process(const char *comm) { |
5489 | return comm && comm[0] == '('; /* Most likely our own helper process (PAM?), ignore */ | |
5490 | } | |
5491 | ||
5492 | int unit_log_leftover_process_start(pid_t pid, int sig, void *userdata) { | |
52ad194e MB |
5493 | _cleanup_free_ char *comm = NULL; |
5494 | ||
5495 | (void) get_process_comm(pid, &comm); | |
5496 | ||
a10f5d05 | 5497 | if (ignore_leftover_process(comm)) |
bb4f798a | 5498 | return 0; |
52ad194e | 5499 | |
a10f5d05 MB |
5500 | /* During start we print a warning */ |
5501 | ||
52ad194e MB |
5502 | log_unit_warning(userdata, |
5503 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5504 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5505 | pid, strna(comm)); | |
bb4f798a MB |
5506 | |
5507 | return 1; | |
52ad194e MB |
5508 | } |
5509 | ||
a10f5d05 MB |
5510 | int unit_log_leftover_process_stop(pid_t pid, int sig, void *userdata) { |
5511 | _cleanup_free_ char *comm = NULL; | |
5512 | ||
5513 | (void) get_process_comm(pid, &comm); | |
5514 | ||
5515 | if (ignore_leftover_process(comm)) | |
5516 | return 0; | |
5517 | ||
5518 | /* During stop we only print an informational message */ | |
5519 | ||
5520 | log_unit_info(userdata, | |
5521 | "Unit process " PID_FMT " (%s) remains running after unit stopped.", | |
5522 | pid, strna(comm)); | |
5523 | ||
5524 | return 1; | |
5525 | } | |
5526 | ||
5527 | int unit_warn_leftover_processes(Unit *u, cg_kill_log_func_t log_func) { | |
52ad194e MB |
5528 | assert(u); |
5529 | ||
5530 | (void) unit_pick_cgroup_path(u); | |
5531 | ||
5532 | if (!u->cgroup_path) | |
bb4f798a | 5533 | return 0; |
52ad194e | 5534 | |
a10f5d05 | 5535 | return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_func, u); |
52ad194e MB |
5536 | } |
5537 | ||
1d42b86d MB |
5538 | bool unit_needs_console(Unit *u) { |
5539 | ExecContext *ec; | |
5540 | UnitActiveState state; | |
5541 | ||
5542 | assert(u); | |
5543 | ||
5544 | state = unit_active_state(u); | |
5545 | ||
5546 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5547 | return false; | |
5548 | ||
5549 | if (UNIT_VTABLE(u)->needs_console) | |
5550 | return UNIT_VTABLE(u)->needs_console(u); | |
5551 | ||
5552 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5553 | ec = unit_get_exec_context(u); | |
5554 | if (!ec) | |
5555 | return false; | |
5556 | ||
5557 | return exec_context_may_touch_console(ec); | |
5558 | } | |
5559 | ||
98393f85 MB |
5560 | int unit_pid_attachable(Unit *u, pid_t pid, sd_bus_error *error) { |
5561 | int r; | |
5562 | ||
5563 | assert(u); | |
5564 | ||
5565 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5566 | * and not a kernel thread either */ | |
5567 | ||
5568 | /* First, a simple range check */ | |
5569 | if (!pid_is_valid(pid)) | |
5570 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier " PID_FMT " is not valid.", pid); | |
5571 | ||
5572 | /* Some extra safety check */ | |
5573 | if (pid == 1 || pid == getpid_cached()) | |
b012e921 | 5574 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager process, refusing.", pid); |
98393f85 MB |
5575 | |
5576 | /* Don't even begin to bother with kernel threads */ | |
5577 | r = is_kernel_thread(pid); | |
5578 | if (r == -ESRCH) | |
5579 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid); | |
5580 | if (r < 0) | |
5581 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid); | |
5582 | if (r > 0) | |
5583 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid); | |
5584 | ||
5585 | return 0; | |
5586 | } | |
5587 | ||
6e866b33 MB |
5588 | void unit_log_success(Unit *u) { |
5589 | assert(u); | |
5590 | ||
626cb2db MB |
5591 | /* Let's show message "Deactivated successfully" in debug mode (when manager is user) rather than in info mode. |
5592 | * This message has low information value for regular users and it might be a bit overwhelming on a system with | |
5593 | * a lot of devices. */ | |
5594 | log_unit_struct(u, | |
5595 | MANAGER_IS_USER(u->manager) ? LOG_DEBUG : LOG_INFO, | |
5b5a102a MB |
5596 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR, |
5597 | LOG_UNIT_INVOCATION_ID(u), | |
5598 | LOG_UNIT_MESSAGE(u, "Deactivated successfully.")); | |
6e866b33 MB |
5599 | } |
5600 | ||
5601 | void unit_log_failure(Unit *u, const char *result) { | |
5602 | assert(u); | |
5603 | assert(result); | |
5604 | ||
5b5a102a MB |
5605 | log_unit_struct(u, LOG_WARNING, |
5606 | "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR, | |
5607 | LOG_UNIT_INVOCATION_ID(u), | |
5608 | LOG_UNIT_MESSAGE(u, "Failed with result '%s'.", result), | |
5609 | "UNIT_RESULT=%s", result); | |
6e866b33 MB |
5610 | } |
5611 | ||
f2dec872 BR |
5612 | void unit_log_skip(Unit *u, const char *result) { |
5613 | assert(u); | |
5614 | assert(result); | |
5615 | ||
5b5a102a MB |
5616 | log_unit_struct(u, LOG_INFO, |
5617 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR, | |
5618 | LOG_UNIT_INVOCATION_ID(u), | |
5619 | LOG_UNIT_MESSAGE(u, "Skipped due to '%s'.", result), | |
5620 | "UNIT_RESULT=%s", result); | |
f2dec872 BR |
5621 | } |
5622 | ||
6e866b33 MB |
5623 | void unit_log_process_exit( |
5624 | Unit *u, | |
6e866b33 MB |
5625 | const char *kind, |
5626 | const char *command, | |
c5fca32e | 5627 | bool success, |
6e866b33 MB |
5628 | int code, |
5629 | int status) { | |
5630 | ||
c5fca32e MB |
5631 | int level; |
5632 | ||
6e866b33 MB |
5633 | assert(u); |
5634 | assert(kind); | |
5635 | ||
c5fca32e MB |
5636 | /* If this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure |
5637 | * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption | |
5638 | * that the service already logged the reason at a higher log level on its own. Otherwise, make it a | |
5639 | * WARNING. */ | |
5640 | if (success) | |
5641 | level = LOG_DEBUG; | |
5642 | else if (code == CLD_EXITED) | |
5643 | level = LOG_NOTICE; | |
5644 | else | |
6e866b33 MB |
5645 | level = LOG_WARNING; |
5646 | ||
5b5a102a MB |
5647 | log_unit_struct(u, level, |
5648 | "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR, | |
67bbd050 | 5649 | LOG_UNIT_MESSAGE(u, "%s exited, code=%s, status=%i/%s%s", |
5b5a102a MB |
5650 | kind, |
5651 | sigchld_code_to_string(code), status, | |
5652 | strna(code == CLD_EXITED | |
5653 | ? exit_status_to_string(status, EXIT_STATUS_FULL) | |
67bbd050 MB |
5654 | : signal_to_string(status)), |
5655 | success ? " (success)" : ""), | |
5b5a102a MB |
5656 | "EXIT_CODE=%s", sigchld_code_to_string(code), |
5657 | "EXIT_STATUS=%i", status, | |
5658 | "COMMAND=%s", strna(command), | |
5659 | LOG_UNIT_INVOCATION_ID(u)); | |
6e866b33 MB |
5660 | } |
5661 | ||
5662 | int unit_exit_status(Unit *u) { | |
5663 | assert(u); | |
5664 | ||
5665 | /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range | |
5666 | * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA | |
5667 | * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main | |
5668 | * service process has exited abnormally (signal/coredump). */ | |
5669 | ||
5670 | if (!UNIT_VTABLE(u)->exit_status) | |
5671 | return -EOPNOTSUPP; | |
5672 | ||
5673 | return UNIT_VTABLE(u)->exit_status(u); | |
5674 | } | |
5675 | ||
5676 | int unit_failure_action_exit_status(Unit *u) { | |
5677 | int r; | |
5678 | ||
5679 | assert(u); | |
5680 | ||
5681 | /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */ | |
5682 | ||
5683 | if (u->failure_action_exit_status >= 0) | |
5684 | return u->failure_action_exit_status; | |
5685 | ||
5686 | r = unit_exit_status(u); | |
5687 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5688 | return 255; | |
5689 | ||
5690 | return r; | |
5691 | } | |
5692 | ||
5693 | int unit_success_action_exit_status(Unit *u) { | |
5694 | int r; | |
5695 | ||
5696 | assert(u); | |
5697 | ||
5698 | /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */ | |
5699 | ||
5700 | if (u->success_action_exit_status >= 0) | |
5701 | return u->success_action_exit_status; | |
5702 | ||
5703 | r = unit_exit_status(u); | |
5704 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5705 | return 255; | |
5706 | ||
5707 | return r; | |
5708 | } | |
5709 | ||
bb4f798a MB |
5710 | int unit_test_trigger_loaded(Unit *u) { |
5711 | Unit *trigger; | |
5712 | ||
5713 | /* Tests whether the unit to trigger is loaded */ | |
5714 | ||
5715 | trigger = UNIT_TRIGGER(u); | |
5716 | if (!trigger) | |
f2dec872 BR |
5717 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
5718 | "Refusing to start, no unit to trigger."); | |
bb4f798a | 5719 | if (trigger->load_state != UNIT_LOADED) |
f2dec872 BR |
5720 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
5721 | "Refusing to start, unit %s to trigger not loaded.", trigger->id); | |
bb4f798a MB |
5722 | |
5723 | return 0; | |
5724 | } | |
5725 | ||
a032b68d MB |
5726 | void unit_destroy_runtime_data(Unit *u, const ExecContext *context) { |
5727 | assert(u); | |
5728 | assert(context); | |
5729 | ||
812752cc MB |
5730 | if (context->runtime_directory_preserve_mode == EXEC_PRESERVE_NO || |
5731 | (context->runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART && !unit_will_restart(u))) | |
5732 | exec_context_destroy_runtime_directory(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME]); | |
a032b68d MB |
5733 | |
5734 | exec_context_destroy_credentials(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME], u->id); | |
812752cc MB |
5735 | } |
5736 | ||
f2dec872 BR |
5737 | int unit_clean(Unit *u, ExecCleanMask mask) { |
5738 | UnitActiveState state; | |
5739 | ||
5740 | assert(u); | |
5741 | ||
5742 | /* Special return values: | |
5743 | * | |
5744 | * -EOPNOTSUPP → cleaning not supported for this unit type | |
5745 | * -EUNATCH → cleaning not defined for this resource type | |
5746 | * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has | |
5747 | * a job queued or similar | |
5748 | */ | |
5749 | ||
5750 | if (!UNIT_VTABLE(u)->clean) | |
5751 | return -EOPNOTSUPP; | |
5752 | ||
5753 | if (mask == 0) | |
5754 | return -EUNATCH; | |
5755 | ||
5756 | if (u->load_state != UNIT_LOADED) | |
5757 | return -EBUSY; | |
5758 | ||
5759 | if (u->job) | |
5760 | return -EBUSY; | |
5761 | ||
5762 | state = unit_active_state(u); | |
5763 | if (!IN_SET(state, UNIT_INACTIVE)) | |
5764 | return -EBUSY; | |
5765 | ||
5766 | return UNIT_VTABLE(u)->clean(u, mask); | |
5767 | } | |
5768 | ||
5769 | int unit_can_clean(Unit *u, ExecCleanMask *ret) { | |
5770 | assert(u); | |
5771 | ||
5772 | if (!UNIT_VTABLE(u)->clean || | |
5773 | u->load_state != UNIT_LOADED) { | |
5774 | *ret = 0; | |
5775 | return 0; | |
5776 | } | |
5777 | ||
5778 | /* When the clean() method is set, can_clean() really should be set too */ | |
5779 | assert(UNIT_VTABLE(u)->can_clean); | |
5780 | ||
5781 | return UNIT_VTABLE(u)->can_clean(u, ret); | |
5782 | } | |
5783 | ||
a10f5d05 MB |
5784 | bool unit_can_freeze(Unit *u) { |
5785 | assert(u); | |
5786 | ||
5787 | if (UNIT_VTABLE(u)->can_freeze) | |
5788 | return UNIT_VTABLE(u)->can_freeze(u); | |
5789 | ||
5790 | return UNIT_VTABLE(u)->freeze; | |
5791 | } | |
5792 | ||
5793 | void unit_frozen(Unit *u) { | |
5794 | assert(u); | |
5795 | ||
5796 | u->freezer_state = FREEZER_FROZEN; | |
5797 | ||
a6810822 | 5798 | bus_unit_send_pending_freezer_message(u, false); |
a10f5d05 MB |
5799 | } |
5800 | ||
5801 | void unit_thawed(Unit *u) { | |
5802 | assert(u); | |
5803 | ||
5804 | u->freezer_state = FREEZER_RUNNING; | |
5805 | ||
a6810822 | 5806 | bus_unit_send_pending_freezer_message(u, false); |
a10f5d05 MB |
5807 | } |
5808 | ||
5809 | static int unit_freezer_action(Unit *u, FreezerAction action) { | |
5810 | UnitActiveState s; | |
5811 | int (*method)(Unit*); | |
5812 | int r; | |
5813 | ||
5814 | assert(u); | |
5815 | assert(IN_SET(action, FREEZER_FREEZE, FREEZER_THAW)); | |
5816 | ||
5817 | method = action == FREEZER_FREEZE ? UNIT_VTABLE(u)->freeze : UNIT_VTABLE(u)->thaw; | |
5818 | if (!method || !cg_freezer_supported()) | |
5819 | return -EOPNOTSUPP; | |
5820 | ||
5821 | if (u->job) | |
5822 | return -EBUSY; | |
5823 | ||
5824 | if (u->load_state != UNIT_LOADED) | |
5825 | return -EHOSTDOWN; | |
5826 | ||
5827 | s = unit_active_state(u); | |
5828 | if (s != UNIT_ACTIVE) | |
5829 | return -EHOSTDOWN; | |
5830 | ||
a6810822 LB |
5831 | if ((IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_THAWING) && action == FREEZER_FREEZE) || |
5832 | (u->freezer_state == FREEZER_THAWING && action == FREEZER_THAW)) | |
a10f5d05 MB |
5833 | return -EALREADY; |
5834 | ||
5835 | r = method(u); | |
5836 | if (r <= 0) | |
5837 | return r; | |
5838 | ||
b3e21333 LB |
5839 | assert(IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_THAWING)); |
5840 | ||
a10f5d05 MB |
5841 | return 1; |
5842 | } | |
5843 | ||
5844 | int unit_freeze(Unit *u) { | |
5845 | return unit_freezer_action(u, FREEZER_FREEZE); | |
5846 | } | |
5847 | ||
5848 | int unit_thaw(Unit *u) { | |
5849 | return unit_freezer_action(u, FREEZER_THAW); | |
5850 | } | |
5851 | ||
5852 | /* Wrappers around low-level cgroup freezer operations common for service and scope units */ | |
5853 | int unit_freeze_vtable_common(Unit *u) { | |
5854 | return unit_cgroup_freezer_action(u, FREEZER_FREEZE); | |
5855 | } | |
5856 | ||
5857 | int unit_thaw_vtable_common(Unit *u) { | |
5858 | return unit_cgroup_freezer_action(u, FREEZER_THAW); | |
5859 | } | |
5860 | ||
ea0999c9 | 5861 | Condition *unit_find_failed_condition(Unit *u) { |
f5caa8fa | 5862 | Condition *failed_trigger = NULL; |
ea0999c9 MB |
5863 | bool has_succeeded_trigger = false; |
5864 | ||
5865 | if (u->condition_result) | |
5866 | return NULL; | |
5867 | ||
5868 | LIST_FOREACH(conditions, c, u->conditions) | |
5869 | if (c->trigger) { | |
5870 | if (c->result == CONDITION_SUCCEEDED) | |
5871 | has_succeeded_trigger = true; | |
5872 | else if (!failed_trigger) | |
5873 | failed_trigger = c; | |
5874 | } else if (c->result != CONDITION_SUCCEEDED) | |
5875 | return c; | |
5876 | ||
5877 | return failed_trigger && !has_succeeded_trigger ? failed_trigger : NULL; | |
5878 | } | |
5879 | ||
52ad194e MB |
5880 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
5881 | [COLLECT_INACTIVE] = "inactive", | |
5882 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
5883 | }; | |
5884 | ||
5885 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); | |
8b3d4ff0 MB |
5886 | |
5887 | Unit* unit_has_dependency(const Unit *u, UnitDependencyAtom atom, Unit *other) { | |
5888 | Unit *i; | |
5889 | ||
5890 | assert(u); | |
5891 | ||
5892 | /* Checks if the unit has a dependency on 'other' with the specified dependency atom. If 'other' is | |
5893 | * NULL checks if the unit has *any* dependency of that atom. Returns 'other' if found (or if 'other' | |
5894 | * is NULL the first entry found), or NULL if not found. */ | |
5895 | ||
5896 | UNIT_FOREACH_DEPENDENCY(i, u, atom) | |
5897 | if (!other || other == i) | |
5898 | return i; | |
5899 | ||
5900 | return NULL; | |
5901 | } | |
5902 | ||
5903 | int unit_get_dependency_array(const Unit *u, UnitDependencyAtom atom, Unit ***ret_array) { | |
5904 | _cleanup_free_ Unit **array = NULL; | |
5905 | size_t n = 0; | |
5906 | Unit *other; | |
5907 | ||
5908 | assert(u); | |
5909 | assert(ret_array); | |
5910 | ||
5911 | /* Gets a list of units matching a specific atom as array. This is useful when iterating through | |
5912 | * dependencies while modifying them: the array is an "atomic snapshot" of sorts, that can be read | |
5913 | * while the dependency table is continuously updated. */ | |
5914 | ||
5915 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
5916 | if (!GREEDY_REALLOC(array, n + 1)) | |
5917 | return -ENOMEM; | |
5918 | ||
5919 | array[n++] = other; | |
5920 | } | |
5921 | ||
5922 | *ret_array = TAKE_PTR(array); | |
5923 | ||
5924 | assert(n <= INT_MAX); | |
5925 | return (int) n; | |
5926 | } | |
086111aa LB |
5927 | |
5928 | const ActivationDetailsVTable * const activation_details_vtable[_UNIT_TYPE_MAX] = { | |
5929 | [UNIT_PATH] = &activation_details_path_vtable, | |
5930 | [UNIT_TIMER] = &activation_details_timer_vtable, | |
5931 | }; | |
5932 | ||
5933 | ActivationDetails *activation_details_new(Unit *trigger_unit) { | |
5934 | _cleanup_free_ ActivationDetails *details = NULL; | |
5935 | ||
5936 | assert(trigger_unit); | |
5937 | assert(trigger_unit->type != _UNIT_TYPE_INVALID); | |
5938 | assert(trigger_unit->id); | |
5939 | ||
5940 | details = malloc0(activation_details_vtable[trigger_unit->type]->object_size); | |
5941 | if (!details) | |
5942 | return NULL; | |
5943 | ||
5944 | *details = (ActivationDetails) { | |
5945 | .n_ref = 1, | |
5946 | .trigger_unit_type = trigger_unit->type, | |
5947 | }; | |
5948 | ||
5949 | details->trigger_unit_name = strdup(trigger_unit->id); | |
5950 | if (!details->trigger_unit_name) | |
5951 | return NULL; | |
5952 | ||
5953 | if (ACTIVATION_DETAILS_VTABLE(details)->init) | |
5954 | ACTIVATION_DETAILS_VTABLE(details)->init(details, trigger_unit); | |
5955 | ||
5956 | return TAKE_PTR(details); | |
5957 | } | |
5958 | ||
5959 | static ActivationDetails *activation_details_free(ActivationDetails *details) { | |
5960 | if (!details) | |
5961 | return NULL; | |
5962 | ||
5963 | if (ACTIVATION_DETAILS_VTABLE(details)->done) | |
5964 | ACTIVATION_DETAILS_VTABLE(details)->done(details); | |
5965 | ||
5966 | free(details->trigger_unit_name); | |
5967 | ||
5968 | return mfree(details); | |
5969 | } | |
5970 | ||
5971 | void activation_details_serialize(ActivationDetails *details, FILE *f) { | |
5972 | if (!details || details->trigger_unit_type == _UNIT_TYPE_INVALID) | |
5973 | return; | |
5974 | ||
5975 | (void) serialize_item(f, "activation-details-unit-type", unit_type_to_string(details->trigger_unit_type)); | |
5976 | if (details->trigger_unit_name) | |
5977 | (void) serialize_item(f, "activation-details-unit-name", details->trigger_unit_name); | |
5978 | if (ACTIVATION_DETAILS_VTABLE(details)->serialize) | |
5979 | ACTIVATION_DETAILS_VTABLE(details)->serialize(details, f); | |
5980 | } | |
5981 | ||
5982 | int activation_details_deserialize(const char *key, const char *value, ActivationDetails **details) { | |
5983 | assert(key); | |
5984 | assert(value); | |
5985 | assert(details); | |
5986 | ||
5987 | if (!*details) { | |
5988 | UnitType t; | |
5989 | ||
5990 | if (!streq(key, "activation-details-unit-type")) | |
5991 | return -EINVAL; | |
5992 | ||
5993 | t = unit_type_from_string(value); | |
5994 | if (t == _UNIT_TYPE_INVALID) | |
5995 | return -EINVAL; | |
5996 | ||
5997 | *details = malloc0(activation_details_vtable[t]->object_size); | |
5998 | if (!*details) | |
5999 | return -ENOMEM; | |
6000 | ||
6001 | **details = (ActivationDetails) { | |
6002 | .n_ref = 1, | |
6003 | .trigger_unit_type = t, | |
6004 | }; | |
6005 | ||
6006 | return 0; | |
6007 | } | |
6008 | ||
6009 | if (streq(key, "activation-details-unit-name")) { | |
6010 | (*details)->trigger_unit_name = strdup(value); | |
6011 | if (!(*details)->trigger_unit_name) | |
6012 | return -ENOMEM; | |
6013 | ||
6014 | return 0; | |
6015 | } | |
6016 | ||
6017 | if (ACTIVATION_DETAILS_VTABLE(*details)->deserialize) | |
6018 | return ACTIVATION_DETAILS_VTABLE(*details)->deserialize(key, value, details); | |
6019 | ||
6020 | return -EINVAL; | |
6021 | } | |
6022 | ||
6023 | int activation_details_append_env(ActivationDetails *details, char ***strv) { | |
6024 | int r = 0; | |
6025 | ||
6026 | assert(strv); | |
6027 | ||
6028 | if (!details) | |
6029 | return 0; | |
6030 | ||
6031 | if (!isempty(details->trigger_unit_name)) { | |
6032 | char *s = strjoin("TRIGGER_UNIT=", details->trigger_unit_name); | |
6033 | if (!s) | |
6034 | return -ENOMEM; | |
6035 | ||
6036 | r = strv_consume(strv, TAKE_PTR(s)); | |
6037 | if (r < 0) | |
6038 | return r; | |
6039 | } | |
6040 | ||
6041 | if (ACTIVATION_DETAILS_VTABLE(details)->append_env) { | |
6042 | r = ACTIVATION_DETAILS_VTABLE(details)->append_env(details, strv); | |
6043 | if (r < 0) | |
6044 | return r; | |
6045 | } | |
6046 | ||
6047 | return r + !isempty(details->trigger_unit_name); /* Return the number of variables added to the env block */ | |
6048 | } | |
6049 | ||
6050 | int activation_details_append_pair(ActivationDetails *details, char ***strv) { | |
6051 | int r = 0; | |
6052 | ||
6053 | assert(strv); | |
6054 | ||
6055 | if (!details) | |
6056 | return 0; | |
6057 | ||
6058 | if (!isempty(details->trigger_unit_name)) { | |
6059 | r = strv_extend(strv, "trigger_unit"); | |
6060 | if (r < 0) | |
6061 | return r; | |
6062 | ||
6063 | r = strv_extend(strv, details->trigger_unit_name); | |
6064 | if (r < 0) | |
6065 | return r; | |
6066 | } | |
6067 | ||
6068 | if (ACTIVATION_DETAILS_VTABLE(details)->append_env) { | |
6069 | r = ACTIVATION_DETAILS_VTABLE(details)->append_pair(details, strv); | |
6070 | if (r < 0) | |
6071 | return r; | |
6072 | } | |
6073 | ||
6074 | return r + !isempty(details->trigger_unit_name); /* Return the number of pairs added to the strv */ | |
6075 | } | |
6076 | ||
6077 | DEFINE_TRIVIAL_REF_UNREF_FUNC(ActivationDetails, activation_details, activation_details_free); |