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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
a7334b09 | 2 | |
87f0e418 | 3 | #include <errno.h> |
0301abf4 | 4 | #include <stdlib.h> |
4c253ed1 | 5 | #include <sys/prctl.h> |
4f5dd394 | 6 | #include <unistd.h> |
87f0e418 | 7 | |
718db961 LP |
8 | #include "sd-id128.h" |
9 | #include "sd-messages.h" | |
4f5dd394 | 10 | |
57b7a260 | 11 | #include "all-units.h" |
d68c645b | 12 | #include "alloc-util.h" |
fab34748 | 13 | #include "bpf-firewall.h" |
5f8ba20d | 14 | #include "bpf-foreign.h" |
cd09a5f3 | 15 | #include "bpf-socket-bind.h" |
4f5dd394 LP |
16 | #include "bus-common-errors.h" |
17 | #include "bus-util.h" | |
fdb3deca | 18 | #include "cgroup-setup.h" |
c6c18be3 | 19 | #include "cgroup-util.h" |
e30bbc90 | 20 | #include "core-varlink.h" |
4f5dd394 LP |
21 | #include "dbus-unit.h" |
22 | #include "dbus.h" | |
23 | #include "dropin.h" | |
24 | #include "escape.h" | |
25 | #include "execute.h" | |
6a48d82f | 26 | #include "fd-util.h" |
a5c32cff | 27 | #include "fileio-label.h" |
ee228be1 | 28 | #include "fileio.h" |
f97b34a6 | 29 | #include "format-util.h" |
4b58153d | 30 | #include "id128-util.h" |
5cfa33e0 | 31 | #include "install.h" |
2d3b784d | 32 | #include "io-util.h" |
a3f5fd96 | 33 | #include "label.h" |
4f5dd394 LP |
34 | #include "load-dropin.h" |
35 | #include "load-fragment.h" | |
36 | #include "log.h" | |
37 | #include "macro.h" | |
f5947a5e | 38 | #include "missing_audit.h" |
4f5dd394 LP |
39 | #include "mkdir.h" |
40 | #include "path-util.h" | |
0b452006 | 41 | #include "process-util.h" |
810ef318 | 42 | #include "rm-rf.h" |
4f5dd394 | 43 | #include "set.h" |
6eb7c172 | 44 | #include "signal-util.h" |
d3070fbd | 45 | #include "sparse-endian.h" |
e9db43d5 | 46 | #include "special.h" |
2e59b241 | 47 | #include "specifier.h" |
8fcde012 | 48 | #include "stat-util.h" |
d054f0a4 | 49 | #include "stdio-util.h" |
5afe510c | 50 | #include "string-table.h" |
07630cea | 51 | #include "string-util.h" |
4f5dd394 | 52 | #include "strv.h" |
5b262f74 | 53 | #include "terminal-util.h" |
e4de7287 | 54 | #include "tmpfile-util.h" |
4f4afc88 | 55 | #include "umask-util.h" |
4f5dd394 | 56 | #include "unit-name.h" |
e9db43d5 | 57 | #include "unit.h" |
b1d4f8e1 LP |
58 | #include "user-util.h" |
59 | #include "virt.h" | |
91ce91c7 JK |
60 | #if BPF_FRAMEWORK |
61 | #include "bpf-link.h" | |
62 | #endif | |
87f0e418 | 63 | |
37109b85 ZJS |
64 | /* Thresholds for logging at INFO level about resource consumption */ |
65 | #define MENTIONWORTHY_CPU_NSEC (1 * NSEC_PER_SEC) | |
66 | #define MENTIONWORTHY_IO_BYTES (1024 * 1024ULL) | |
67 | #define MENTIONWORTHY_IP_BYTES (0ULL) | |
68 | ||
69 | /* Thresholds for logging at INFO level about resource consumption */ | |
70 | #define NOTICEWORTHY_CPU_NSEC (10*60 * NSEC_PER_SEC) /* 10 minutes */ | |
71 | #define NOTICEWORTHY_IO_BYTES (10 * 1024 * 1024ULL) /* 10 MB */ | |
72 | #define NOTICEWORTHY_IP_BYTES (128 * 1024 * 1024ULL) /* 128 MB */ | |
73 | ||
87f0e418 LP |
74 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { |
75 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 LP |
76 | [UNIT_SOCKET] = &socket_vtable, |
77 | [UNIT_TARGET] = &target_vtable, | |
78 | [UNIT_DEVICE] = &device_vtable, | |
79 | [UNIT_MOUNT] = &mount_vtable, | |
80 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 81 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 82 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 83 | [UNIT_PATH] = &path_vtable, |
6c12b52e | 84 | [UNIT_SLICE] = &slice_vtable, |
5afe510c | 85 | [UNIT_SCOPE] = &scope_vtable, |
87f0e418 LP |
86 | }; |
87 | ||
75db809a | 88 | Unit* unit_new(Manager *m, size_t size) { |
87f0e418 LP |
89 | Unit *u; |
90 | ||
91 | assert(m); | |
ac155bb8 | 92 | assert(size >= sizeof(Unit)); |
87f0e418 | 93 | |
7d17cfbc MS |
94 | u = malloc0(size); |
95 | if (!u) | |
87f0e418 LP |
96 | return NULL; |
97 | ||
ac155bb8 MS |
98 | u->manager = m; |
99 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
100 | u->default_dependencies = true; |
101 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 102 | u->unit_file_preset = -1; |
d420282b | 103 | u->on_failure_job_mode = JOB_REPLACE; |
294446dc | 104 | u->on_success_job_mode = JOB_FAIL; |
0bb814c2 | 105 | u->cgroup_control_inotify_wd = -1; |
afcfaa69 | 106 | u->cgroup_memory_inotify_wd = -1; |
36c16a7c | 107 | u->job_timeout = USEC_INFINITY; |
a2df3ea4 | 108 | u->job_running_timeout = USEC_INFINITY; |
00d9ef85 LP |
109 | u->ref_uid = UID_INVALID; |
110 | u->ref_gid = GID_INVALID; | |
fe700f46 | 111 | u->cpu_usage_last = NSEC_INFINITY; |
17f14955 | 112 | u->cgroup_invalidated_mask |= CGROUP_MASK_BPF_FIREWALL; |
7af67e9a | 113 | u->failure_action_exit_status = u->success_action_exit_status = -1; |
87f0e418 | 114 | |
6a48d82f DM |
115 | u->ip_accounting_ingress_map_fd = -1; |
116 | u->ip_accounting_egress_map_fd = -1; | |
0fd9c28c LP |
117 | for (CGroupIOAccountingMetric i = 0; i < _CGROUP_IO_ACCOUNTING_METRIC_MAX; i++) |
118 | u->io_accounting_last[i] = UINT64_MAX; | |
119 | ||
6a48d82f DM |
120 | u->ipv4_allow_map_fd = -1; |
121 | u->ipv6_allow_map_fd = -1; | |
122 | u->ipv4_deny_map_fd = -1; | |
123 | u->ipv6_deny_map_fd = -1; | |
124 | ||
2e59b241 LP |
125 | u->last_section_private = -1; |
126 | ||
7bf081a1 | 127 | u->start_ratelimit = (RateLimit) { m->default_start_limit_interval, m->default_start_limit_burst }; |
0bc488c9 | 128 | u->auto_start_stop_ratelimit = (RateLimit) { 10 * USEC_PER_SEC, 16 }; |
bea355da | 129 | |
87f0e418 LP |
130 | return u; |
131 | } | |
132 | ||
a581e45a | 133 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
dc409696 | 134 | _cleanup_(unit_freep) Unit *u = NULL; |
a581e45a LP |
135 | int r; |
136 | ||
137 | u = unit_new(m, size); | |
138 | if (!u) | |
139 | return -ENOMEM; | |
140 | ||
141 | r = unit_add_name(u, name); | |
dc409696 | 142 | if (r < 0) |
a581e45a | 143 | return r; |
a581e45a | 144 | |
1cc6c93a YW |
145 | *ret = TAKE_PTR(u); |
146 | ||
a581e45a LP |
147 | return r; |
148 | } | |
149 | ||
303ee601 | 150 | bool unit_has_name(const Unit *u, const char *name) { |
f278026d LP |
151 | assert(u); |
152 | assert(name); | |
153 | ||
4562c355 ZJS |
154 | return streq_ptr(name, u->id) || |
155 | set_contains(u->aliases, name); | |
f278026d LP |
156 | } |
157 | ||
598459ce LP |
158 | static void unit_init(Unit *u) { |
159 | CGroupContext *cc; | |
160 | ExecContext *ec; | |
161 | KillContext *kc; | |
162 | ||
163 | assert(u); | |
164 | assert(u->manager); | |
165 | assert(u->type >= 0); | |
166 | ||
167 | cc = unit_get_cgroup_context(u); | |
168 | if (cc) { | |
169 | cgroup_context_init(cc); | |
170 | ||
171 | /* Copy in the manager defaults into the cgroup | |
172 | * context, _before_ the rest of the settings have | |
173 | * been initialized */ | |
174 | ||
175 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
13c31542 | 176 | cc->io_accounting = u->manager->default_io_accounting; |
598459ce LP |
177 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
178 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 179 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
6a48d82f | 180 | cc->ip_accounting = u->manager->default_ip_accounting; |
0af20ea2 LP |
181 | |
182 | if (u->type != UNIT_SLICE) | |
183 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
184 | } |
185 | ||
186 | ec = unit_get_exec_context(u); | |
b1edf445 | 187 | if (ec) { |
598459ce LP |
188 | exec_context_init(ec); |
189 | ||
5e37d193 FB |
190 | if (MANAGER_IS_SYSTEM(u->manager)) |
191 | ec->keyring_mode = EXEC_KEYRING_SHARED; | |
192 | else { | |
193 | ec->keyring_mode = EXEC_KEYRING_INHERIT; | |
194 | ||
195 | /* User manager might have its umask redefined by PAM or UMask=. In this | |
196 | * case let the units it manages inherit this value by default. They can | |
197 | * still tune this value through their own unit file */ | |
198 | (void) get_process_umask(getpid_cached(), &ec->umask); | |
199 | } | |
b1edf445 LP |
200 | } |
201 | ||
598459ce LP |
202 | kc = unit_get_kill_context(u); |
203 | if (kc) | |
204 | kill_context_init(kc); | |
205 | ||
206 | if (UNIT_VTABLE(u)->init) | |
207 | UNIT_VTABLE(u)->init(u); | |
208 | } | |
209 | ||
4562c355 ZJS |
210 | static int unit_add_alias(Unit *u, char *donated_name) { |
211 | int r; | |
212 | ||
213 | /* Make sure that u->names is allocated. We may leave u->names | |
214 | * empty if we fail later, but this is not a problem. */ | |
973bc32a | 215 | r = set_ensure_put(&u->aliases, &string_hash_ops, donated_name); |
4562c355 ZJS |
216 | if (r < 0) |
217 | return r; | |
218 | assert(r > 0); | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
87f0e418 | 223 | int unit_add_name(Unit *u, const char *text) { |
4562c355 | 224 | _cleanup_free_ char *name = NULL, *instance = NULL; |
87f0e418 | 225 | UnitType t; |
87f0e418 LP |
226 | int r; |
227 | ||
228 | assert(u); | |
229 | assert(text); | |
230 | ||
7410616c | 231 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 232 | if (!u->instance) |
acd1987a WY |
233 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
234 | "instance is not set when adding name '%s': %m", text); | |
87f0e418 | 235 | |
4562c355 | 236 | r = unit_name_replace_instance(text, u->instance, &name); |
7410616c | 237 | if (r < 0) |
acd1987a WY |
238 | return log_unit_debug_errno(u, r, |
239 | "failed to build instance name from '%s': %m", text); | |
7410616c | 240 | } else { |
4562c355 ZJS |
241 | name = strdup(text); |
242 | if (!name) | |
7410616c LP |
243 | return -ENOMEM; |
244 | } | |
87f0e418 | 245 | |
4562c355 | 246 | if (unit_has_name(u, name)) |
7410616c | 247 | return 0; |
4562c355 ZJS |
248 | |
249 | if (hashmap_contains(u->manager->units, name)) | |
acd1987a | 250 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EEXIST), |
4562c355 | 251 | "unit already exist when adding name '%s': %m", name); |
7410616c | 252 | |
4562c355 | 253 | if (!unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) |
acd1987a | 254 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
4562c355 | 255 | "name '%s' is invalid: %m", name); |
e537352b | 256 | |
4562c355 | 257 | t = unit_name_to_type(name); |
7410616c | 258 | if (t < 0) |
acd1987a | 259 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
cd990847 | 260 | "failed to derive unit type from name '%s': %m", name); |
87f0e418 | 261 | |
598459ce | 262 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
acd1987a WY |
263 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
264 | "unit type is illegal: u->type(%d) and t(%d) for name '%s': %m", | |
4562c355 | 265 | u->type, t, name); |
87f0e418 | 266 | |
4562c355 | 267 | r = unit_name_to_instance(name, &instance); |
e48614c4 | 268 | if (r < 0) |
4562c355 | 269 | return log_unit_debug_errno(u, r, "failed to extract instance from name '%s': %m", name); |
87f0e418 | 270 | |
4562c355 ZJS |
271 | if (instance && !unit_type_may_template(t)) |
272 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), "templates are not allowed for name '%s': %m", name); | |
9e2f7c11 | 273 | |
d383acad ZJS |
274 | /* Ensure that this unit either has no instance, or that the instance matches. */ |
275 | if (u->type != _UNIT_TYPE_INVALID && !streq_ptr(u->instance, instance)) | |
acd1987a | 276 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EINVAL), |
ada4b34e ZJS |
277 | "cannot add name %s, the instances don't match (\"%s\" != \"%s\").", |
278 | name, instance, u->instance); | |
9e2f7c11 | 279 | |
4562c355 | 280 | if (u->id && !unit_type_may_alias(t)) |
ada4b34e ZJS |
281 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(EEXIST), |
282 | "cannot add name %s, aliases are not allowed for %s units.", | |
283 | name, unit_type_to_string(t)); | |
9e2f7c11 | 284 | |
598459ce | 285 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
ada4b34e | 286 | return log_unit_warning_errno(u, SYNTHETIC_ERRNO(E2BIG), "cannot add name, manager has too many units: %m"); |
4f0f902f | 287 | |
4562c355 ZJS |
288 | /* Add name to the global hashmap first, because that's easier to undo */ |
289 | r = hashmap_put(u->manager->units, name, u); | |
7410616c | 290 | if (r < 0) |
acd1987a | 291 | return log_unit_debug_errno(u, r, "add unit to hashmap failed for name '%s': %m", text); |
87f0e418 | 292 | |
4562c355 ZJS |
293 | if (u->id) { |
294 | r = unit_add_alias(u, name); /* unit_add_alias() takes ownership of the name on success */ | |
295 | if (r < 0) { | |
296 | hashmap_remove(u->manager->units, name); | |
297 | return r; | |
298 | } | |
299 | TAKE_PTR(name); | |
300 | ||
301 | } else { | |
302 | /* A new name, we don't need the set yet. */ | |
303 | assert(u->type == _UNIT_TYPE_INVALID); | |
304 | assert(!u->instance); | |
305 | ||
ac155bb8 | 306 | u->type = t; |
4562c355 ZJS |
307 | u->id = TAKE_PTR(name); |
308 | u->instance = TAKE_PTR(instance); | |
9e2f7c11 | 309 | |
71fda00f | 310 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
598459ce | 311 | unit_init(u); |
598459ce | 312 | } |
9e2f7c11 | 313 | |
598459ce LP |
314 | unit_add_to_dbus_queue(u); |
315 | return 0; | |
87f0e418 LP |
316 | } |
317 | ||
0ae97ec1 | 318 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 319 | _cleanup_free_ char *t = NULL; |
4562c355 | 320 | char *s; |
276c3e78 | 321 | int r; |
0ae97ec1 LP |
322 | |
323 | assert(u); | |
324 | assert(name); | |
325 | ||
7410616c | 326 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 327 | if (!u->instance) |
9e2f7c11 LP |
328 | return -EINVAL; |
329 | ||
7410616c LP |
330 | r = unit_name_replace_instance(name, u->instance, &t); |
331 | if (r < 0) | |
332 | return r; | |
9e2f7c11 LP |
333 | |
334 | name = t; | |
335 | } | |
336 | ||
4562c355 ZJS |
337 | if (streq_ptr(u->id, name)) |
338 | return 0; /* Nothing to do. */ | |
339 | ||
340 | /* Selects one of the aliases of this unit as the id */ | |
341 | s = set_get(u->aliases, (char*) name); | |
9e2f7c11 | 342 | if (!s) |
0ae97ec1 LP |
343 | return -ENOENT; |
344 | ||
4562c355 ZJS |
345 | if (u->id) { |
346 | r = set_remove_and_put(u->aliases, name, u->id); | |
347 | if (r < 0) | |
348 | return r; | |
349 | } else | |
350 | assert_se(set_remove(u->aliases, name)); /* see set_get() above… */ | |
276c3e78 | 351 | |
4562c355 | 352 | u->id = s; /* Old u->id is now stored in the set, and s is not stored anywhere */ |
c1e1601e | 353 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 354 | |
0ae97ec1 LP |
355 | return 0; |
356 | } | |
357 | ||
f50e0a01 | 358 | int unit_set_description(Unit *u, const char *description) { |
84b26d51 | 359 | int r; |
f50e0a01 LP |
360 | |
361 | assert(u); | |
362 | ||
84b26d51 LP |
363 | r = free_and_strdup(&u->description, empty_to_null(description)); |
364 | if (r < 0) | |
365 | return r; | |
366 | if (r > 0) | |
367 | unit_add_to_dbus_queue(u); | |
c1e1601e | 368 | |
f50e0a01 LP |
369 | return 0; |
370 | } | |
371 | ||
f2f725e5 | 372 | bool unit_may_gc(Unit *u) { |
a354329f | 373 | UnitActiveState state; |
e98b2fbb | 374 | int r; |
5afe510c | 375 | |
701cc384 LP |
376 | assert(u); |
377 | ||
f2f725e5 ZJS |
378 | /* Checks whether the unit is ready to be unloaded for garbage collection. |
379 | * Returns true when the unit may be collected, and false if there's some | |
2641f02e ZJS |
380 | * reason to keep it loaded. |
381 | * | |
382 | * References from other units are *not* checked here. Instead, this is done | |
383 | * in unit_gc_sweep(), but using markers to properly collect dependency loops. | |
384 | */ | |
5afe510c | 385 | |
a354329f | 386 | if (u->job) |
f2f725e5 | 387 | return false; |
701cc384 | 388 | |
a354329f | 389 | if (u->nop_job) |
f2f725e5 | 390 | return false; |
6c073082 | 391 | |
a354329f LP |
392 | state = unit_active_state(u); |
393 | ||
7eb2a8a1 | 394 | /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */ |
a354329f LP |
395 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && |
396 | UNIT_VTABLE(u)->release_resources) | |
7eb2a8a1 | 397 | UNIT_VTABLE(u)->release_resources(u); |
a354329f | 398 | |
f5869324 | 399 | if (u->perpetual) |
f2f725e5 | 400 | return false; |
9d576438 | 401 | |
05a98afd | 402 | if (sd_bus_track_count(u->bus_track) > 0) |
f2f725e5 | 403 | return false; |
05a98afd | 404 | |
5afe510c LP |
405 | /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */ |
406 | switch (u->collect_mode) { | |
407 | ||
408 | case COLLECT_INACTIVE: | |
409 | if (state != UNIT_INACTIVE) | |
f2f725e5 | 410 | return false; |
5afe510c LP |
411 | |
412 | break; | |
413 | ||
414 | case COLLECT_INACTIVE_OR_FAILED: | |
415 | if (!IN_SET(state, UNIT_INACTIVE, UNIT_FAILED)) | |
f2f725e5 | 416 | return false; |
5afe510c LP |
417 | |
418 | break; | |
419 | ||
420 | default: | |
421 | assert_not_reached("Unknown garbage collection mode"); | |
422 | } | |
423 | ||
e98b2fbb LP |
424 | if (u->cgroup_path) { |
425 | /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay | |
426 | * around. Units with active processes should never be collected. */ | |
427 | ||
428 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path); | |
429 | if (r < 0) | |
430 | log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", u->cgroup_path); | |
431 | if (r <= 0) | |
f2f725e5 | 432 | return false; |
e98b2fbb LP |
433 | } |
434 | ||
f2f725e5 ZJS |
435 | if (UNIT_VTABLE(u)->may_gc && !UNIT_VTABLE(u)->may_gc(u)) |
436 | return false; | |
701cc384 | 437 | |
f2f725e5 | 438 | return true; |
701cc384 LP |
439 | } |
440 | ||
87f0e418 LP |
441 | void unit_add_to_load_queue(Unit *u) { |
442 | assert(u); | |
ac155bb8 | 443 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 444 | |
ac155bb8 | 445 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
446 | return; |
447 | ||
71fda00f | 448 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 449 | u->in_load_queue = true; |
87f0e418 LP |
450 | } |
451 | ||
23a177ef LP |
452 | void unit_add_to_cleanup_queue(Unit *u) { |
453 | assert(u); | |
454 | ||
ac155bb8 | 455 | if (u->in_cleanup_queue) |
23a177ef LP |
456 | return; |
457 | ||
71fda00f | 458 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 459 | u->in_cleanup_queue = true; |
23a177ef LP |
460 | } |
461 | ||
701cc384 LP |
462 | void unit_add_to_gc_queue(Unit *u) { |
463 | assert(u); | |
464 | ||
ac155bb8 | 465 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
466 | return; |
467 | ||
f2f725e5 | 468 | if (!unit_may_gc(u)) |
701cc384 LP |
469 | return; |
470 | ||
c5a97ed1 | 471 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 472 | u->in_gc_queue = true; |
701cc384 LP |
473 | } |
474 | ||
c1e1601e LP |
475 | void unit_add_to_dbus_queue(Unit *u) { |
476 | assert(u); | |
ac155bb8 | 477 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 478 | |
ac155bb8 | 479 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
480 | return; |
481 | ||
a567261a | 482 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 483 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 484 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 485 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 486 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
487 | return; |
488 | } | |
489 | ||
71fda00f | 490 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 491 | u->in_dbus_queue = true; |
c1e1601e LP |
492 | } |
493 | ||
fda09318 | 494 | void unit_submit_to_stop_when_unneeded_queue(Unit *u) { |
a3c1168a LP |
495 | assert(u); |
496 | ||
497 | if (u->in_stop_when_unneeded_queue) | |
498 | return; | |
499 | ||
500 | if (!u->stop_when_unneeded) | |
501 | return; | |
502 | ||
503 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
504 | return; | |
505 | ||
506 | LIST_PREPEND(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
507 | u->in_stop_when_unneeded_queue = true; | |
508 | } | |
509 | ||
0bc488c9 LP |
510 | void unit_submit_to_start_when_upheld_queue(Unit *u) { |
511 | assert(u); | |
512 | ||
513 | if (u->in_start_when_upheld_queue) | |
514 | return; | |
515 | ||
516 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u))) | |
517 | return; | |
518 | ||
519 | if (!unit_has_dependency(u, UNIT_ATOM_START_STEADILY, NULL)) | |
520 | return; | |
521 | ||
522 | LIST_PREPEND(start_when_upheld_queue, u->manager->start_when_upheld_queue, u); | |
523 | u->in_start_when_upheld_queue = true; | |
524 | } | |
525 | ||
56c59592 LP |
526 | void unit_submit_to_stop_when_bound_queue(Unit *u) { |
527 | assert(u); | |
528 | ||
529 | if (u->in_stop_when_bound_queue) | |
530 | return; | |
531 | ||
532 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) | |
533 | return; | |
534 | ||
535 | if (!unit_has_dependency(u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT, NULL)) | |
536 | return; | |
537 | ||
538 | LIST_PREPEND(stop_when_bound_queue, u->manager->stop_when_bound_queue, u); | |
539 | u->in_stop_when_bound_queue = true; | |
540 | } | |
541 | ||
15ed3c3a | 542 | static void unit_clear_dependencies(Unit *u) { |
87f0e418 LP |
543 | assert(u); |
544 | ||
15ed3c3a LP |
545 | /* Removes all dependencies configured on u and their reverse dependencies. */ |
546 | ||
547 | for (Hashmap *deps; (deps = hashmap_steal_first(u->dependencies));) { | |
87f0e418 | 548 | |
15ed3c3a LP |
549 | for (Unit *other; (other = hashmap_steal_first_key(deps));) { |
550 | Hashmap *other_deps; | |
701cc384 | 551 | |
15ed3c3a LP |
552 | HASHMAP_FOREACH(other_deps, other->dependencies) |
553 | hashmap_remove(other_deps, u); | |
554 | ||
555 | unit_add_to_gc_queue(other); | |
556 | } | |
557 | ||
558 | hashmap_free(deps); | |
87f0e418 LP |
559 | } |
560 | ||
15ed3c3a | 561 | u->dependencies = hashmap_free(u->dependencies); |
87f0e418 LP |
562 | } |
563 | ||
c2756a68 LP |
564 | static void unit_remove_transient(Unit *u) { |
565 | char **i; | |
566 | ||
567 | assert(u); | |
568 | ||
569 | if (!u->transient) | |
570 | return; | |
571 | ||
572 | if (u->fragment_path) | |
3f5e8115 | 573 | (void) unlink(u->fragment_path); |
c2756a68 LP |
574 | |
575 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 576 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 577 | |
39591351 LP |
578 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
579 | if (!p) | |
580 | continue; | |
581 | ||
582 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
583 | if (!pp) | |
584 | continue; | |
585 | ||
586 | /* Only drop transient drop-ins */ | |
587 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
588 | continue; | |
c2756a68 | 589 | |
39591351 LP |
590 | (void) unlink(*i); |
591 | (void) rmdir(p); | |
c2756a68 LP |
592 | } |
593 | } | |
594 | ||
a57f7e2c | 595 | static void unit_free_requires_mounts_for(Unit *u) { |
eef85c4a | 596 | assert(u); |
a57f7e2c | 597 | |
eef85c4a | 598 | for (;;) { |
c2b2df60 | 599 | _cleanup_free_ char *path = NULL; |
a57f7e2c | 600 | |
eef85c4a LP |
601 | path = hashmap_steal_first_key(u->requires_mounts_for); |
602 | if (!path) | |
603 | break; | |
604 | else { | |
605 | char s[strlen(path) + 1]; | |
a57f7e2c | 606 | |
eef85c4a LP |
607 | PATH_FOREACH_PREFIX_MORE(s, path) { |
608 | char *y; | |
609 | Set *x; | |
610 | ||
611 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
612 | if (!x) | |
613 | continue; | |
a57f7e2c | 614 | |
eef85c4a | 615 | (void) set_remove(x, u); |
a57f7e2c | 616 | |
eef85c4a LP |
617 | if (set_isempty(x)) { |
618 | (void) hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
619 | free(y); | |
620 | set_free(x); | |
621 | } | |
a57f7e2c LP |
622 | } |
623 | } | |
624 | } | |
625 | ||
eef85c4a | 626 | u->requires_mounts_for = hashmap_free(u->requires_mounts_for); |
a57f7e2c LP |
627 | } |
628 | ||
598459ce LP |
629 | static void unit_done(Unit *u) { |
630 | ExecContext *ec; | |
631 | CGroupContext *cc; | |
632 | ||
633 | assert(u); | |
634 | ||
635 | if (u->type < 0) | |
636 | return; | |
637 | ||
638 | if (UNIT_VTABLE(u)->done) | |
639 | UNIT_VTABLE(u)->done(u); | |
640 | ||
641 | ec = unit_get_exec_context(u); | |
642 | if (ec) | |
643 | exec_context_done(ec); | |
644 | ||
645 | cc = unit_get_cgroup_context(u); | |
646 | if (cc) | |
647 | cgroup_context_done(cc); | |
648 | } | |
649 | ||
75db809a | 650 | Unit* unit_free(Unit *u) { |
12f64221 | 651 | Unit *slice; |
87f0e418 LP |
652 | char *t; |
653 | ||
c9d5c9c0 | 654 | if (!u) |
75db809a | 655 | return NULL; |
87f0e418 | 656 | |
50fb00b7 | 657 | u->transient_file = safe_fclose(u->transient_file); |
4f4afc88 | 658 | |
2c289ea8 | 659 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
660 | unit_remove_transient(u); |
661 | ||
c1e1601e LP |
662 | bus_unit_send_removed_signal(u); |
663 | ||
598459ce | 664 | unit_done(u); |
a013b84b | 665 | |
50be4f4a | 666 | unit_dequeue_rewatch_pids(u); |
cf9fd508 | 667 | |
50be4f4a | 668 | sd_bus_slot_unref(u->match_bus_slot); |
05a98afd LP |
669 | sd_bus_track_unref(u->bus_track); |
670 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
d9e45bc3 | 671 | u->pending_freezer_message = sd_bus_message_unref(u->pending_freezer_message); |
05a98afd | 672 | |
a57f7e2c LP |
673 | unit_free_requires_mounts_for(u); |
674 | ||
90e74a66 | 675 | SET_FOREACH(t, u->aliases) |
ac155bb8 | 676 | hashmap_remove_value(u->manager->units, t, u); |
4562c355 ZJS |
677 | if (u->id) |
678 | hashmap_remove_value(u->manager->units, u->id, u); | |
87f0e418 | 679 | |
4b58153d LP |
680 | if (!sd_id128_is_null(u->invocation_id)) |
681 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
682 | ||
97e7d748 MS |
683 | if (u->job) { |
684 | Job *j = u->job; | |
685 | job_uninstall(j); | |
686 | job_free(j); | |
687 | } | |
964e0949 | 688 | |
e0209d83 MS |
689 | if (u->nop_job) { |
690 | Job *j = u->nop_job; | |
691 | job_uninstall(j); | |
692 | job_free(j); | |
693 | } | |
694 | ||
4c591f39 MK |
695 | /* A unit is being dropped from the tree, make sure our family is realized properly. Do this after we |
696 | * detach the unit from slice tree in order to eliminate its effect on controller masks. */ | |
12f64221 | 697 | slice = UNIT_GET_SLICE(u); |
d219a2b0 | 698 | unit_clear_dependencies(u); |
12f64221 LP |
699 | if (slice) |
700 | unit_add_family_to_cgroup_realize_queue(slice); | |
fb46fca7 | 701 | |
adefcf28 LP |
702 | if (u->on_console) |
703 | manager_unref_console(u->manager); | |
704 | ||
3d027d4d JK |
705 | |
706 | fdset_free(u->initial_socket_bind_link_fds); | |
91ce91c7 JK |
707 | #if BPF_FRAMEWORK |
708 | bpf_link_free(u->ipv4_socket_bind_link); | |
709 | bpf_link_free(u->ipv6_socket_bind_link); | |
710 | #endif | |
711 | ||
efdb0237 | 712 | unit_release_cgroup(u); |
72673e86 | 713 | |
d3070fbd LP |
714 | if (!MANAGER_IS_RELOADING(u->manager)) |
715 | unit_unlink_state_files(u); | |
716 | ||
00d9ef85 LP |
717 | unit_unref_uid_gid(u, false); |
718 | ||
5269eb6b | 719 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 720 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 721 | |
a911bb9a LP |
722 | unit_unwatch_all_pids(u); |
723 | ||
7f7d01ed ZJS |
724 | while (u->refs_by_target) |
725 | unit_ref_unset(u->refs_by_target); | |
57020a3a | 726 | |
ac155bb8 | 727 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 728 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 729 | |
ac155bb8 | 730 | if (u->in_load_queue) |
71fda00f | 731 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 732 | |
ac155bb8 | 733 | if (u->in_dbus_queue) |
71fda00f | 734 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 735 | |
a2d72e26 | 736 | if (u->in_gc_queue) |
c5a97ed1 | 737 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 738 | |
91a6073e LP |
739 | if (u->in_cgroup_realize_queue) |
740 | LIST_REMOVE(cgroup_realize_queue, u->manager->cgroup_realize_queue, u); | |
87f0e418 | 741 | |
09e24654 LP |
742 | if (u->in_cgroup_empty_queue) |
743 | LIST_REMOVE(cgroup_empty_queue, u->manager->cgroup_empty_queue, u); | |
744 | ||
1bdf2790 ZJS |
745 | if (u->in_cleanup_queue) |
746 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); | |
adefcf28 | 747 | |
19496554 MS |
748 | if (u->in_target_deps_queue) |
749 | LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u); | |
750 | ||
a3c1168a LP |
751 | if (u->in_stop_when_unneeded_queue) |
752 | LIST_REMOVE(stop_when_unneeded_queue, u->manager->stop_when_unneeded_queue, u); | |
753 | ||
0bc488c9 LP |
754 | if (u->in_start_when_upheld_queue) |
755 | LIST_REMOVE(start_when_upheld_queue, u->manager->start_when_upheld_queue, u); | |
756 | ||
56c59592 LP |
757 | if (u->in_stop_when_bound_queue) |
758 | LIST_REMOVE(stop_when_bound_queue, u->manager->stop_when_bound_queue, u); | |
759 | ||
0fd9c28c | 760 | bpf_firewall_close(u); |
fab34748 | 761 | |
5f8ba20d JK |
762 | hashmap_free(u->bpf_foreign_by_key); |
763 | ||
084c7007 RG |
764 | bpf_program_unref(u->bpf_device_control_installed); |
765 | ||
a946fa9b ZJS |
766 | condition_free_list(u->conditions); |
767 | condition_free_list(u->asserts); | |
f755e3b7 | 768 | |
ac155bb8 | 769 | free(u->description); |
49dbfa7b | 770 | strv_free(u->documentation); |
ac155bb8 | 771 | free(u->fragment_path); |
1b64d026 | 772 | free(u->source_path); |
ae7a7182 | 773 | strv_free(u->dropin_paths); |
ac155bb8 | 774 | free(u->instance); |
87f0e418 | 775 | |
f189ab18 | 776 | free(u->job_timeout_reboot_arg); |
6bf0f408 LP |
777 | free(u->reboot_arg); |
778 | ||
4562c355 ZJS |
779 | set_free_free(u->aliases); |
780 | free(u->id); | |
781 | ||
75db809a | 782 | return mfree(u); |
87f0e418 LP |
783 | } |
784 | ||
d9e45bc3 MS |
785 | FreezerState unit_freezer_state(Unit *u) { |
786 | assert(u); | |
787 | ||
788 | return u->freezer_state; | |
789 | } | |
790 | ||
791 | int unit_freezer_state_kernel(Unit *u, FreezerState *ret) { | |
792 | char *values[1] = {}; | |
793 | int r; | |
794 | ||
795 | assert(u); | |
796 | ||
797 | r = cg_get_keyed_attribute(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "cgroup.events", | |
798 | STRV_MAKE("frozen"), values); | |
799 | if (r < 0) | |
800 | return r; | |
801 | ||
802 | r = _FREEZER_STATE_INVALID; | |
803 | ||
804 | if (values[0]) { | |
805 | if (streq(values[0], "0")) | |
806 | r = FREEZER_RUNNING; | |
807 | else if (streq(values[0], "1")) | |
808 | r = FREEZER_FROZEN; | |
809 | } | |
810 | ||
811 | free(values[0]); | |
812 | *ret = r; | |
813 | ||
814 | return 0; | |
815 | } | |
816 | ||
87f0e418 LP |
817 | UnitActiveState unit_active_state(Unit *u) { |
818 | assert(u); | |
819 | ||
ac155bb8 | 820 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
821 | return unit_active_state(unit_follow_merge(u)); |
822 | ||
823 | /* After a reload it might happen that a unit is not correctly | |
824 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 825 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
826 | |
827 | return UNIT_VTABLE(u)->active_state(u); | |
828 | } | |
829 | ||
10a94420 LP |
830 | const char* unit_sub_state_to_string(Unit *u) { |
831 | assert(u); | |
832 | ||
833 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
834 | } | |
835 | ||
15ed3c3a | 836 | static int unit_merge_names(Unit *u, Unit *other) { |
4562c355 | 837 | char *name; |
7c0b05e5 | 838 | int r; |
87f0e418 | 839 | |
23a177ef LP |
840 | assert(u); |
841 | assert(other); | |
842 | ||
4562c355 | 843 | r = unit_add_alias(u, other->id); |
7c0b05e5 MS |
844 | if (r < 0) |
845 | return r; | |
23a177ef | 846 | |
4562c355 ZJS |
847 | r = set_move(u->aliases, other->aliases); |
848 | if (r < 0) { | |
849 | set_remove(u->aliases, other->id); | |
850 | return r; | |
851 | } | |
23a177ef | 852 | |
4562c355 ZJS |
853 | TAKE_PTR(other->id); |
854 | other->aliases = set_free_free(other->aliases); | |
23a177ef | 855 | |
90e74a66 | 856 | SET_FOREACH(name, u->aliases) |
4562c355 | 857 | assert_se(hashmap_replace(u->manager->units, name, u) == 0); |
7c0b05e5 MS |
858 | |
859 | return 0; | |
87f0e418 LP |
860 | } |
861 | ||
15ed3c3a LP |
862 | static int unit_reserve_dependencies(Unit *u, Unit *other) { |
863 | size_t n_reserve; | |
864 | Hashmap* deps; | |
865 | void *d; | |
866 | int r; | |
09a65f92 MS |
867 | |
868 | assert(u); | |
869 | assert(other); | |
09a65f92 | 870 | |
15ed3c3a LP |
871 | /* Let's reserve some space in the dependency hashmaps so that later on merging the units cannot |
872 | * fail. | |
873 | * | |
874 | * First make some room in the per dependency type hashmaps. Using the summed size of both unit's | |
875 | * hashmaps is an estimate that is likely too high since they probably use some of the same | |
876 | * types. But it's never too low, and that's all we need. */ | |
877 | ||
878 | n_reserve = MIN(hashmap_size(other->dependencies), LESS_BY((size_t) _UNIT_DEPENDENCY_MAX, hashmap_size(u->dependencies))); | |
879 | if (n_reserve > 0) { | |
880 | r = hashmap_ensure_allocated(&u->dependencies, NULL); | |
881 | if (r < 0) | |
882 | return r; | |
883 | ||
884 | r = hashmap_reserve(u->dependencies, n_reserve); | |
885 | if (r < 0) | |
886 | return r; | |
887 | } | |
888 | ||
889 | /* Now, enlarge our per dependency type hashmaps by the number of entries in the same hashmap of the | |
890 | * other unit's dependencies. | |
891 | * | |
892 | * NB: If u does not have a dependency set allocated for some dependency type, there is no need to | |
893 | * reserve anything for. In that case other's set will be transferred as a whole to u by | |
894 | * complete_move(). */ | |
895 | ||
896 | HASHMAP_FOREACH_KEY(deps, d, u->dependencies) { | |
897 | Hashmap *other_deps; | |
898 | ||
899 | other_deps = hashmap_get(other->dependencies, d); | |
900 | ||
901 | r = hashmap_reserve(deps, hashmap_size(other_deps)); | |
902 | if (r < 0) | |
903 | return r; | |
904 | } | |
905 | ||
906 | return 0; | |
907 | } | |
908 | ||
909 | static void unit_maybe_warn_about_dependency( | |
910 | Unit *u, | |
911 | const char *other_id, | |
912 | UnitDependency dependency) { | |
913 | ||
914 | assert(u); | |
915 | ||
916 | /* Only warn about some unit types */ | |
917 | if (!IN_SET(dependency, | |
918 | UNIT_CONFLICTS, | |
919 | UNIT_CONFLICTED_BY, | |
920 | UNIT_BEFORE, | |
921 | UNIT_AFTER, | |
294446dc | 922 | UNIT_ON_SUCCESS, |
15ed3c3a LP |
923 | UNIT_ON_FAILURE, |
924 | UNIT_TRIGGERS, | |
925 | UNIT_TRIGGERED_BY)) | |
926 | return; | |
927 | ||
928 | if (streq_ptr(u->id, other_id)) | |
929 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
930 | else | |
931 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other_id), u->id); | |
932 | } | |
933 | ||
934 | static int unit_per_dependency_type_hashmap_update( | |
935 | Hashmap *per_type, | |
936 | Unit *other, | |
937 | UnitDependencyMask origin_mask, | |
938 | UnitDependencyMask destination_mask) { | |
939 | ||
940 | UnitDependencyInfo info; | |
941 | int r; | |
942 | ||
943 | assert(other); | |
944 | assert_cc(sizeof(void*) == sizeof(info)); | |
945 | ||
946 | /* Acquire the UnitDependencyInfo entry for the Unit* we are interested in, and update it if it | |
947 | * exists, or insert it anew if not. */ | |
09a65f92 | 948 | |
15ed3c3a LP |
949 | info.data = hashmap_get(per_type, other); |
950 | if (info.data) { | |
951 | /* Entry already exists. Add in our mask. */ | |
952 | ||
953 | if (FLAGS_SET(origin_mask, info.origin_mask) && | |
954 | FLAGS_SET(destination_mask, info.destination_mask)) | |
955 | return 0; /* NOP */ | |
956 | ||
957 | info.origin_mask |= origin_mask; | |
958 | info.destination_mask |= destination_mask; | |
959 | ||
960 | r = hashmap_update(per_type, other, info.data); | |
961 | } else { | |
962 | info = (UnitDependencyInfo) { | |
963 | .origin_mask = origin_mask, | |
964 | .destination_mask = destination_mask, | |
965 | }; | |
09a65f92 | 966 | |
15ed3c3a LP |
967 | r = hashmap_put(per_type, other, info.data); |
968 | } | |
969 | if (r < 0) | |
970 | return r; | |
971 | ||
972 | ||
973 | return 1; | |
09a65f92 MS |
974 | } |
975 | ||
15ed3c3a LP |
976 | static int unit_add_dependency_hashmap( |
977 | Hashmap **dependencies, | |
978 | UnitDependency d, | |
979 | Unit *other, | |
980 | UnitDependencyMask origin_mask, | |
981 | UnitDependencyMask destination_mask) { | |
982 | ||
983 | Hashmap *per_type; | |
87f0e418 | 984 | int r; |
23a177ef | 985 | |
15ed3c3a LP |
986 | assert(dependencies); |
987 | assert(other); | |
988 | assert(origin_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
989 | assert(destination_mask < _UNIT_DEPENDENCY_MASK_FULL); | |
990 | assert(origin_mask > 0 || destination_mask > 0); | |
991 | ||
992 | /* Ensure the top-level dependency hashmap exists that maps UnitDependency → Hashmap(Unit* → | |
993 | * UnitDependencyInfo) */ | |
994 | r = hashmap_ensure_allocated(dependencies, NULL); | |
995 | if (r < 0) | |
996 | return r; | |
997 | ||
998 | /* Acquire the inner hashmap, that maps Unit* → UnitDependencyInfo, for the specified dependency | |
999 | * type, and if it's missing allocate it and insert it. */ | |
1000 | per_type = hashmap_get(*dependencies, UNIT_DEPENDENCY_TO_PTR(d)); | |
1001 | if (!per_type) { | |
1002 | per_type = hashmap_new(NULL); | |
1003 | if (!per_type) | |
1004 | return -ENOMEM; | |
1005 | ||
1006 | r = hashmap_put(*dependencies, UNIT_DEPENDENCY_TO_PTR(d), per_type); | |
1007 | if (r < 0) { | |
1008 | hashmap_free(per_type); | |
1009 | return r; | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | return unit_per_dependency_type_hashmap_update(per_type, other, origin_mask, destination_mask); | |
1014 | } | |
1015 | ||
1016 | static void unit_merge_dependencies( | |
1017 | Unit *u, | |
1018 | Unit *other) { | |
1019 | ||
1020 | int r; | |
eef85c4a | 1021 | |
23a177ef LP |
1022 | assert(u); |
1023 | assert(other); | |
23a177ef | 1024 | |
15ed3c3a LP |
1025 | if (u == other) |
1026 | return; | |
1027 | ||
1028 | for (;;) { | |
1029 | _cleanup_(hashmap_freep) Hashmap *other_deps = NULL; | |
1030 | UnitDependencyInfo di_back; | |
1031 | Unit *back; | |
1032 | void *dt; /* Actually of type UnitDependency, except that we don't bother casting it here, | |
1033 | * since the hashmaps all want it as void pointer. */ | |
1034 | ||
1035 | /* Let's focus on one dependency type at a time, that 'other' has defined. */ | |
1036 | other_deps = hashmap_steal_first_key_and_value(other->dependencies, &dt); | |
1037 | if (!other_deps) | |
1038 | break; /* done! */ | |
1039 | ||
1040 | /* Now iterate through all dependencies of this dependency type, of 'other'. We refer to the | |
1041 | * referenced units as 'back'. */ | |
1042 | HASHMAP_FOREACH_KEY(di_back.data, back, other_deps) { | |
1043 | Hashmap *back_deps; | |
1044 | void *back_dt; | |
eef85c4a | 1045 | |
e66047ff | 1046 | if (back == u) { |
15ed3c3a LP |
1047 | /* This is a dependency pointing back to the unit we want to merge with? |
1048 | * Suppress it (but warn) */ | |
1049 | unit_maybe_warn_about_dependency(u, other->id, UNIT_DEPENDENCY_FROM_PTR(dt)); | |
1050 | continue; | |
1051 | } | |
eef85c4a | 1052 | |
15ed3c3a LP |
1053 | /* Now iterate through all deps of 'back', and fix the ones pointing to 'other' to |
1054 | * point to 'u' instead. */ | |
1055 | HASHMAP_FOREACH_KEY(back_deps, back_dt, back->dependencies) { | |
1056 | UnitDependencyInfo di_move; | |
eef85c4a | 1057 | |
15ed3c3a LP |
1058 | di_move.data = hashmap_remove(back_deps, other); |
1059 | if (!di_move.data) | |
1060 | continue; | |
eef85c4a | 1061 | |
15ed3c3a LP |
1062 | assert_se(unit_per_dependency_type_hashmap_update( |
1063 | back_deps, | |
1064 | u, | |
1065 | di_move.origin_mask, | |
1066 | di_move.destination_mask) >= 0); | |
1067 | } | |
1068 | } | |
eef85c4a | 1069 | |
15ed3c3a LP |
1070 | /* Now all references towards 'other' of the current type 'dt' are corrected to point to |
1071 | * 'u'. Lets's now move the deps of type 'dt' from 'other' to 'u'. First, let's try to move | |
1072 | * them per type wholesale. */ | |
1073 | r = hashmap_put(u->dependencies, dt, other_deps); | |
1074 | if (r == -EEXIST) { | |
1075 | Hashmap *deps; | |
eef85c4a | 1076 | |
15ed3c3a | 1077 | /* The target unit already has dependencies of this type, let's then merge this individually. */ |
eef85c4a | 1078 | |
15ed3c3a LP |
1079 | assert_se(deps = hashmap_get(u->dependencies, dt)); |
1080 | ||
1081 | for (;;) { | |
1082 | UnitDependencyInfo di_move; | |
1083 | ||
1084 | /* Get first dep */ | |
1085 | di_move.data = hashmap_steal_first_key_and_value(other_deps, (void**) &back); | |
1086 | if (!di_move.data) | |
1087 | break; /* done */ | |
1088 | if (back == u) { | |
1089 | /* Would point back to us, ignore */ | |
1090 | unit_maybe_warn_about_dependency(u, other->id, UNIT_DEPENDENCY_FROM_PTR(dt)); | |
1091 | continue; | |
1092 | } | |
23a177ef | 1093 | |
15ed3c3a LP |
1094 | assert_se(unit_per_dependency_type_hashmap_update(deps, back, di_move.origin_mask, di_move.destination_mask) >= 0); |
1095 | } | |
1096 | } else { | |
1097 | assert_se(r >= 0); | |
1098 | TAKE_PTR(other_deps); | |
e66047ff | 1099 | |
15ed3c3a LP |
1100 | if (hashmap_remove(other_deps, u)) |
1101 | unit_maybe_warn_about_dependency(u, other->id, UNIT_DEPENDENCY_FROM_PTR(dt)); | |
1102 | } | |
1103 | } | |
23a177ef | 1104 | |
15ed3c3a | 1105 | other->dependencies = hashmap_free(other->dependencies); |
23a177ef LP |
1106 | } |
1107 | ||
1108 | int unit_merge(Unit *u, Unit *other) { | |
09a65f92 | 1109 | int r; |
87f0e418 LP |
1110 | |
1111 | assert(u); | |
1112 | assert(other); | |
ac155bb8 MS |
1113 | assert(u->manager == other->manager); |
1114 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 1115 | |
cc916967 LP |
1116 | other = unit_follow_merge(other); |
1117 | ||
23a177ef LP |
1118 | if (other == u) |
1119 | return 0; | |
1120 | ||
ac155bb8 | 1121 | if (u->type != other->type) |
9e2f7c11 LP |
1122 | return -EINVAL; |
1123 | ||
8a993b61 | 1124 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
1125 | return -EEXIST; |
1126 | ||
ec2ce0c5 | 1127 | if (!IN_SET(other->load_state, UNIT_STUB, UNIT_NOT_FOUND)) |
23a177ef | 1128 | return -EEXIST; |
87f0e418 | 1129 | |
d383acad ZJS |
1130 | if (!streq_ptr(u->instance, other->instance)) |
1131 | return -EINVAL; | |
1132 | ||
ac155bb8 | 1133 | if (other->job) |
819e213f LP |
1134 | return -EEXIST; |
1135 | ||
e0209d83 MS |
1136 | if (other->nop_job) |
1137 | return -EEXIST; | |
1138 | ||
fdf20a31 | 1139 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
1140 | return -EEXIST; |
1141 | ||
15ed3c3a LP |
1142 | /* Make reservations to ensure merge_dependencies() won't fail. We don't rollback reservations if we |
1143 | * fail. We don't have a way to undo reservations. A reservation is not a leak. */ | |
1144 | r = unit_reserve_dependencies(u, other); | |
1145 | if (r < 0) | |
1146 | return r; | |
09a65f92 | 1147 | |
87f0e418 | 1148 | /* Merge names */ |
15ed3c3a | 1149 | r = unit_merge_names(u, other); |
7c0b05e5 MS |
1150 | if (r < 0) |
1151 | return r; | |
87f0e418 | 1152 | |
57020a3a | 1153 | /* Redirect all references */ |
7f7d01ed ZJS |
1154 | while (other->refs_by_target) |
1155 | unit_ref_set(other->refs_by_target, other->refs_by_target->source, u); | |
57020a3a | 1156 | |
87f0e418 | 1157 | /* Merge dependencies */ |
15ed3c3a | 1158 | unit_merge_dependencies(u, other); |
87f0e418 | 1159 | |
ac155bb8 MS |
1160 | other->load_state = UNIT_MERGED; |
1161 | other->merged_into = u; | |
23a177ef | 1162 | |
3616a49c LP |
1163 | /* If there is still some data attached to the other node, we |
1164 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 1165 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
1166 | if (UNIT_VTABLE(other)->done) |
1167 | UNIT_VTABLE(other)->done(other); | |
1168 | ||
1169 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
1170 | unit_add_to_cleanup_queue(other); |
1171 | ||
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 1176 | _cleanup_free_ char *s = NULL; |
23a177ef | 1177 | Unit *other; |
9e2f7c11 | 1178 | int r; |
23a177ef | 1179 | |
e8630e69 ZJS |
1180 | /* Either add name to u, or if a unit with name already exists, merge it with u. |
1181 | * If name is a template, do the same for name@instance, where instance is u's instance. */ | |
1182 | ||
23a177ef LP |
1183 | assert(u); |
1184 | assert(name); | |
1185 | ||
7410616c | 1186 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 1187 | if (!u->instance) |
9e2f7c11 LP |
1188 | return -EINVAL; |
1189 | ||
7410616c LP |
1190 | r = unit_name_replace_instance(name, u->instance, &s); |
1191 | if (r < 0) | |
1192 | return r; | |
9e2f7c11 LP |
1193 | |
1194 | name = s; | |
1195 | } | |
1196 | ||
c2756a68 | 1197 | other = manager_get_unit(u->manager, name); |
7410616c LP |
1198 | if (other) |
1199 | return unit_merge(u, other); | |
23a177ef | 1200 | |
7410616c | 1201 | return unit_add_name(u, name); |
23a177ef LP |
1202 | } |
1203 | ||
1204 | Unit* unit_follow_merge(Unit *u) { | |
1205 | assert(u); | |
1206 | ||
ac155bb8 MS |
1207 | while (u->load_state == UNIT_MERGED) |
1208 | assert_se(u = u->merged_into); | |
23a177ef LP |
1209 | |
1210 | return u; | |
1211 | } | |
1212 | ||
1213 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
1214 | int r; | |
1215 | ||
1216 | assert(u); | |
1217 | assert(c); | |
1218 | ||
e1e74614 | 1219 | if (c->working_directory && !c->working_directory_missing_ok) { |
eef85c4a | 1220 | r = unit_require_mounts_for(u, c->working_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1221 | if (r < 0) |
1222 | return r; | |
1223 | } | |
1224 | ||
1225 | if (c->root_directory) { | |
eef85c4a | 1226 | r = unit_require_mounts_for(u, c->root_directory, UNIT_DEPENDENCY_FILE); |
36be24c8 ZJS |
1227 | if (r < 0) |
1228 | return r; | |
1229 | } | |
1230 | ||
915e6d16 | 1231 | if (c->root_image) { |
eef85c4a | 1232 | r = unit_require_mounts_for(u, c->root_image, UNIT_DEPENDENCY_FILE); |
915e6d16 LP |
1233 | if (r < 0) |
1234 | return r; | |
1235 | } | |
1236 | ||
12375b95 | 1237 | for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
ada5e276 YW |
1238 | if (!u->manager->prefix[dt]) |
1239 | continue; | |
1240 | ||
12375b95 | 1241 | char **dp; |
ada5e276 | 1242 | STRV_FOREACH(dp, c->directories[dt].paths) { |
c2b2df60 | 1243 | _cleanup_free_ char *p = NULL; |
ada5e276 | 1244 | |
657ee2d8 | 1245 | p = path_join(u->manager->prefix[dt], *dp); |
ada5e276 YW |
1246 | if (!p) |
1247 | return -ENOMEM; | |
1248 | ||
eef85c4a | 1249 | r = unit_require_mounts_for(u, p, UNIT_DEPENDENCY_FILE); |
ada5e276 YW |
1250 | if (r < 0) |
1251 | return r; | |
1252 | } | |
1253 | } | |
1254 | ||
463d0d15 | 1255 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
1256 | return 0; |
1257 | ||
f3b7a79b LP |
1258 | /* For the following three directory types we need write access, and /var/ is possibly on the root |
1259 | * fs. Hence order after systemd-remount-fs.service, to ensure things are writable. */ | |
1260 | if (!strv_isempty(c->directories[EXEC_DIRECTORY_STATE].paths) || | |
1261 | !strv_isempty(c->directories[EXEC_DIRECTORY_CACHE].paths) || | |
1262 | !strv_isempty(c->directories[EXEC_DIRECTORY_LOGS].paths)) { | |
1263 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, true, UNIT_DEPENDENCY_FILE); | |
1264 | if (r < 0) | |
1265 | return r; | |
1266 | } | |
1267 | ||
b46a529c | 1268 | if (c->private_tmp) { |
d71f0505 | 1269 | |
b2c7d1bb FB |
1270 | /* FIXME: for now we make a special case for /tmp and add a weak dependency on |
1271 | * tmp.mount so /tmp being masked is supported. However there's no reason to treat | |
1272 | * /tmp specifically and masking other mount units should be handled more | |
1273 | * gracefully too, see PR#16894. */ | |
1274 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "tmp.mount", true, UNIT_DEPENDENCY_FILE); | |
1275 | if (r < 0) | |
1276 | return r; | |
1277 | ||
1278 | r = unit_require_mounts_for(u, "/var/tmp", UNIT_DEPENDENCY_FILE); | |
1279 | if (r < 0) | |
1280 | return r; | |
b46a529c | 1281 | |
35d8c19a | 1282 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, true, UNIT_DEPENDENCY_FILE); |
b46a529c LP |
1283 | if (r < 0) |
1284 | return r; | |
1285 | } | |
1286 | ||
33b58dfb LP |
1287 | if (c->root_image) { |
1288 | /* We need to wait for /dev/loopX to appear when doing RootImage=, hence let's add an | |
1289 | * implicit dependency on udev */ | |
1290 | ||
1291 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_UDEVD_SERVICE, true, UNIT_DEPENDENCY_FILE); | |
1292 | if (r < 0) | |
1293 | return r; | |
1294 | } | |
1295 | ||
52c239d7 LB |
1296 | if (!IN_SET(c->std_output, |
1297 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1298 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
52c239d7 LB |
1299 | !IN_SET(c->std_error, |
1300 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
f3dc6af2 | 1301 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE) && |
91dd5f7c | 1302 | !c->log_namespace) |
23a177ef LP |
1303 | return 0; |
1304 | ||
91dd5f7c LP |
1305 | /* If syslog or kernel logging is requested (or log namespacing is), make sure our own logging daemon |
1306 | * is run first. */ | |
1307 | ||
1308 | if (c->log_namespace) { | |
dc5437c7 | 1309 | _cleanup_free_ char *socket_unit = NULL, *varlink_socket_unit = NULL; |
23a177ef | 1310 | |
91dd5f7c LP |
1311 | r = unit_name_build_from_type("systemd-journald", c->log_namespace, UNIT_SOCKET, &socket_unit); |
1312 | if (r < 0) | |
1313 | return r; | |
1314 | ||
1315 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, socket_unit, true, UNIT_DEPENDENCY_FILE); | |
1316 | if (r < 0) | |
1317 | return r; | |
dc5437c7 LP |
1318 | |
1319 | r = unit_name_build_from_type("systemd-journald-varlink", c->log_namespace, UNIT_SOCKET, &varlink_socket_unit); | |
1320 | if (r < 0) | |
1321 | return r; | |
1322 | ||
1323 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, varlink_socket_unit, true, UNIT_DEPENDENCY_FILE); | |
1324 | if (r < 0) | |
1325 | return r; | |
91dd5f7c LP |
1326 | } else |
1327 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, true, UNIT_DEPENDENCY_FILE); | |
b46a529c LP |
1328 | if (r < 0) |
1329 | return r; | |
23a177ef | 1330 | |
87f0e418 LP |
1331 | return 0; |
1332 | } | |
1333 | ||
04d232d8 | 1334 | const char* unit_description(Unit *u) { |
87f0e418 LP |
1335 | assert(u); |
1336 | ||
ac155bb8 MS |
1337 | if (u->description) |
1338 | return u->description; | |
87f0e418 | 1339 | |
ac155bb8 | 1340 | return strna(u->id); |
87f0e418 LP |
1341 | } |
1342 | ||
04d232d8 | 1343 | const char* unit_status_string(Unit *u, char **combined) { |
2a8f53c6 | 1344 | assert(u); |
04d232d8 | 1345 | assert(u->id); |
2a8f53c6 | 1346 | |
04d232d8 ZJS |
1347 | /* Return u->id, u->description, or "{u->id} - {u->description}". |
1348 | * Versions with u->description are only used if it is set. | |
1349 | * The last option is used if configured and the caller provided 'combined' pointer. */ | |
1350 | ||
1351 | if (!u->description || | |
1352 | u->manager->status_unit_format == STATUS_UNIT_FORMAT_NAME || | |
1353 | (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED && !combined)) | |
2a8f53c6 ZJS |
1354 | return u->id; |
1355 | ||
04d232d8 ZJS |
1356 | if (u->description && u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED && combined) { |
1357 | char *t = strjoin(u->id, " - ", u->description); | |
1358 | if (t) { | |
1359 | *combined = t; | |
1360 | return t; | |
1361 | } else | |
1362 | log_oom(); | |
1363 | } | |
1364 | ||
1365 | return u->description; | |
2a8f53c6 ZJS |
1366 | } |
1367 | ||
87f0e418 | 1368 | /* Common implementation for multiple backends */ |
c3620770 | 1369 | int unit_load_fragment_and_dropin(Unit *u, bool fragment_required) { |
23a177ef LP |
1370 | int r; |
1371 | ||
1372 | assert(u); | |
23a177ef | 1373 | |
e48614c4 | 1374 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1375 | r = unit_load_fragment(u); |
1376 | if (r < 0) | |
23a177ef LP |
1377 | return r; |
1378 | ||
c3620770 ZJS |
1379 | if (u->load_state == UNIT_STUB) { |
1380 | if (fragment_required) | |
1381 | return -ENOENT; | |
1382 | ||
1383 | u->load_state = UNIT_LOADED; | |
1384 | } | |
23a177ef | 1385 | |
9e4ea9cc ZJS |
1386 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1387 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1388 | * been loaded and which not, at least without doing complicated book-keeping, | |
1389 | * so let's always reread all drop-ins. */ | |
c9e06956 ZJS |
1390 | r = unit_load_dropin(unit_follow_merge(u)); |
1391 | if (r < 0) | |
1392 | return r; | |
1393 | ||
1394 | if (u->source_path) { | |
1395 | struct stat st; | |
1396 | ||
1397 | if (stat(u->source_path, &st) >= 0) | |
1398 | u->source_mtime = timespec_load(&st.st_mtim); | |
1399 | else | |
1400 | u->source_mtime = 0; | |
1401 | } | |
1402 | ||
1403 | return 0; | |
23a177ef LP |
1404 | } |
1405 | ||
19496554 MS |
1406 | void unit_add_to_target_deps_queue(Unit *u) { |
1407 | Manager *m = u->manager; | |
1408 | ||
1409 | assert(u); | |
1410 | ||
1411 | if (u->in_target_deps_queue) | |
1412 | return; | |
1413 | ||
1414 | LIST_PREPEND(target_deps_queue, m->target_deps_queue, u); | |
1415 | u->in_target_deps_queue = true; | |
1416 | } | |
1417 | ||
bba34eed | 1418 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1419 | assert(u); |
1420 | assert(target); | |
1421 | ||
ac155bb8 | 1422 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1423 | return 0; |
1424 | ||
35b8ca3a | 1425 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1426 | * that loop check below is reliable */ |
ac155bb8 MS |
1427 | if (u->load_state != UNIT_LOADED || |
1428 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1429 | return 0; |
1430 | ||
21256a2b LP |
1431 | /* If either side wants no automatic dependencies, then let's |
1432 | * skip this */ | |
ac155bb8 MS |
1433 | if (!u->default_dependencies || |
1434 | !target->default_dependencies) | |
21256a2b LP |
1435 | return 0; |
1436 | ||
98bc2000 | 1437 | /* Don't create loops */ |
15ed3c3a | 1438 | if (unit_has_dependency(target, UNIT_ATOM_BEFORE, u)) |
98bc2000 LP |
1439 | return 0; |
1440 | ||
eef85c4a | 1441 | return unit_add_dependency(target, UNIT_AFTER, u, true, UNIT_DEPENDENCY_DEFAULT); |
98bc2000 LP |
1442 | } |
1443 | ||
e954c9cf | 1444 | static int unit_add_slice_dependencies(Unit *u) { |
12f64221 | 1445 | Unit *slice; |
e954c9cf | 1446 | assert(u); |
b81884e7 | 1447 | |
35b7ff80 | 1448 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1449 | return 0; |
1450 | ||
eef85c4a LP |
1451 | /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the |
1452 | name), while all other units are ordered based on configuration (as in their case Slice= configures the | |
1453 | relationship). */ | |
f6173cb9 | 1454 | UnitDependencyMask mask = u->type == UNIT_SLICE ? UNIT_DEPENDENCY_IMPLICIT : UNIT_DEPENDENCY_FILE; |
eef85c4a | 1455 | |
12f64221 LP |
1456 | slice = UNIT_GET_SLICE(u); |
1457 | if (slice) | |
1458 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, slice, true, mask); | |
e954c9cf | 1459 | |
8c8da0e0 | 1460 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1461 | return 0; |
1462 | ||
5a724170 | 1463 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, true, mask); |
98bc2000 LP |
1464 | } |
1465 | ||
e954c9cf | 1466 | static int unit_add_mount_dependencies(Unit *u) { |
eef85c4a LP |
1467 | UnitDependencyInfo di; |
1468 | const char *path; | |
9588bc32 LP |
1469 | int r; |
1470 | ||
1471 | assert(u); | |
1472 | ||
90e74a66 | 1473 | HASHMAP_FOREACH_KEY(di.data, path, u->requires_mounts_for) { |
eef85c4a | 1474 | char prefix[strlen(path) + 1]; |
9588bc32 | 1475 | |
eef85c4a | 1476 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
c7c89abb | 1477 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1478 | Unit *m; |
1479 | ||
c7c89abb | 1480 | r = unit_name_from_path(prefix, ".mount", &p); |
598a6a84 LP |
1481 | if (IN_SET(r, -EINVAL, -ENAMETOOLONG)) |
1482 | continue; /* If the path cannot be converted to a mount unit name, then it's | |
4076ad9d | 1483 | * not manageable as a unit by systemd, and hence we don't need a |
598a6a84 | 1484 | * dependency on it. Let's thus silently ignore the issue. */ |
9588bc32 LP |
1485 | if (r < 0) |
1486 | return r; | |
c7c89abb FB |
1487 | |
1488 | m = manager_get_unit(u->manager, p); | |
1489 | if (!m) { | |
598a6a84 LP |
1490 | /* Make sure to load the mount unit if it exists. If so the dependencies on |
1491 | * this unit will be added later during the loading of the mount unit. */ | |
c7c89abb | 1492 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); |
9588bc32 | 1493 | continue; |
c7c89abb | 1494 | } |
9588bc32 LP |
1495 | if (m == u) |
1496 | continue; | |
1497 | ||
1498 | if (m->load_state != UNIT_LOADED) | |
1499 | continue; | |
1500 | ||
eef85c4a | 1501 | r = unit_add_dependency(u, UNIT_AFTER, m, true, di.origin_mask); |
9588bc32 LP |
1502 | if (r < 0) |
1503 | return r; | |
1504 | ||
1505 | if (m->fragment_path) { | |
eef85c4a | 1506 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true, di.origin_mask); |
9588bc32 LP |
1507 | if (r < 0) |
1508 | return r; | |
1509 | } | |
1510 | } | |
1511 | } | |
1512 | ||
1513 | return 0; | |
1514 | } | |
1515 | ||
a2db0225 AZ |
1516 | static int unit_add_oomd_dependencies(Unit *u) { |
1517 | CGroupContext *c; | |
1518 | bool wants_oomd; | |
1519 | int r; | |
1520 | ||
1521 | assert(u); | |
1522 | ||
1523 | if (!u->default_dependencies) | |
1524 | return 0; | |
1525 | ||
1526 | c = unit_get_cgroup_context(u); | |
1527 | if (!c) | |
1528 | return 0; | |
1529 | ||
1530 | wants_oomd = (c->moom_swap == MANAGED_OOM_KILL || c->moom_mem_pressure == MANAGED_OOM_KILL); | |
1531 | if (!wants_oomd) | |
1532 | return 0; | |
1533 | ||
1534 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "systemd-oomd.service", true, UNIT_DEPENDENCY_FILE); | |
1535 | if (r < 0) | |
1536 | return r; | |
1537 | ||
1538 | return 0; | |
1539 | } | |
1540 | ||
95ae05c0 WC |
1541 | static int unit_add_startup_units(Unit *u) { |
1542 | CGroupContext *c; | |
95ae05c0 WC |
1543 | |
1544 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1545 | if (!c) |
1546 | return 0; | |
1547 | ||
d53d9474 | 1548 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1549 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1550 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1551 | return 0; |
1552 | ||
de7fef4b | 1553 | return set_ensure_put(&u->manager->startup_units, NULL, u); |
95ae05c0 WC |
1554 | } |
1555 | ||
294446dc LP |
1556 | static int unit_validate_on_failure_job_mode( |
1557 | Unit *u, | |
1558 | const char *job_mode_setting, | |
1559 | JobMode job_mode, | |
1560 | const char *dependency_name, | |
1561 | UnitDependencyAtom atom) { | |
1562 | ||
1563 | Unit *other, *found = NULL; | |
1564 | ||
1565 | if (job_mode != JOB_ISOLATE) | |
1566 | return 0; | |
1567 | ||
1568 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
1569 | if (!found) | |
1570 | found = other; | |
1571 | else if (found != other) | |
1572 | return log_unit_error_errno( | |
1573 | u, SYNTHETIC_ERRNO(ENOEXEC), | |
1574 | "More than one %s dependencies specified but %sisolate set. Refusing.", | |
1575 | dependency_name, job_mode_setting); | |
1576 | } | |
1577 | ||
1578 | return 0; | |
1579 | } | |
1580 | ||
87f0e418 LP |
1581 | int unit_load(Unit *u) { |
1582 | int r; | |
1583 | ||
1584 | assert(u); | |
1585 | ||
ac155bb8 | 1586 | if (u->in_load_queue) { |
71fda00f | 1587 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1588 | u->in_load_queue = false; |
87f0e418 LP |
1589 | } |
1590 | ||
ac155bb8 | 1591 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1592 | return -EINVAL; |
1593 | ||
ac155bb8 | 1594 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1595 | return 0; |
1596 | ||
4f4afc88 | 1597 | if (u->transient_file) { |
66fa4bdd LP |
1598 | /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup |
1599 | * is complete, hence let's synchronize the unit file we just wrote to disk. */ | |
1600 | ||
4f4afc88 LP |
1601 | r = fflush_and_check(u->transient_file); |
1602 | if (r < 0) | |
1603 | goto fail; | |
1604 | ||
50fb00b7 | 1605 | u->transient_file = safe_fclose(u->transient_file); |
f76707da | 1606 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1607 | } |
1608 | ||
c3784a7d ZJS |
1609 | r = UNIT_VTABLE(u)->load(u); |
1610 | if (r < 0) | |
23a177ef | 1611 | goto fail; |
c3784a7d ZJS |
1612 | |
1613 | assert(u->load_state != UNIT_STUB); | |
23a177ef | 1614 | |
7c8fa05c | 1615 | if (u->load_state == UNIT_LOADED) { |
19496554 | 1616 | unit_add_to_target_deps_queue(u); |
e954c9cf LP |
1617 | |
1618 | r = unit_add_slice_dependencies(u); | |
1619 | if (r < 0) | |
1620 | goto fail; | |
c2756a68 | 1621 | |
e954c9cf | 1622 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1623 | if (r < 0) |
c2756a68 | 1624 | goto fail; |
7c8fa05c | 1625 | |
a2db0225 AZ |
1626 | r = unit_add_oomd_dependencies(u); |
1627 | if (r < 0) | |
1628 | goto fail; | |
1629 | ||
95ae05c0 WC |
1630 | r = unit_add_startup_units(u); |
1631 | if (r < 0) | |
1632 | goto fail; | |
1633 | ||
294446dc LP |
1634 | r = unit_validate_on_failure_job_mode(u, "OnSuccessJobMode=", u->on_success_job_mode, "OnSuccess=", UNIT_ATOM_ON_SUCCESS); |
1635 | if (r < 0) | |
1636 | goto fail; | |
15ed3c3a | 1637 | |
294446dc LP |
1638 | r = unit_validate_on_failure_job_mode(u, "OnFailureJobMode=", u->on_failure_job_mode, "OnFailure=", UNIT_ATOM_ON_FAILURE); |
1639 | if (r < 0) | |
1640 | goto fail; | |
bc432dc7 | 1641 | |
a2df3ea4 MK |
1642 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1643 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1644 | ||
5af88058 LP |
1645 | /* We finished loading, let's ensure our parents recalculate the members mask */ |
1646 | unit_invalidate_cgroup_members_masks(u); | |
f68319bb LP |
1647 | } |
1648 | ||
ac155bb8 | 1649 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1650 | |
1651 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1652 | unit_add_to_gc_queue(u); |
f561e8c6 | 1653 | (void) manager_varlink_send_managed_oom_update(u); |
87f0e418 | 1654 | |
87f0e418 LP |
1655 | return 0; |
1656 | ||
1657 | fail: | |
81be2388 ZJS |
1658 | /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code |
1659 | * should hence return ENOEXEC to ensure units are placed in this state after loading. */ | |
c4555ad8 LP |
1660 | |
1661 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : | |
1662 | r == -ENOEXEC ? UNIT_BAD_SETTING : | |
1663 | UNIT_ERROR; | |
ac155bb8 | 1664 | u->load_error = r; |
c4555ad8 | 1665 | |
c149d2b4 ZJS |
1666 | /* Record the timestamp on the cache, so that if the cache gets updated between now and the next time |
1667 | * an attempt is made to load this unit, we know we need to check again. */ | |
7233e91a | 1668 | if (u->load_state == UNIT_NOT_FOUND) |
c2911d48 | 1669 | u->fragment_not_found_timestamp_hash = u->manager->unit_cache_timestamp_hash; |
7233e91a | 1670 | |
c1e1601e | 1671 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1672 | unit_add_to_gc_queue(u); |
23a177ef | 1673 | |
c4555ad8 | 1674 | return log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
87f0e418 LP |
1675 | } |
1676 | ||
f9f88198 YW |
1677 | _printf_(7, 8) |
1678 | static int log_unit_internal(void *userdata, int level, int error, const char *file, int line, const char *func, const char *format, ...) { | |
1679 | Unit *u = userdata; | |
1680 | va_list ap; | |
1681 | int r; | |
49365733 | 1682 | |
c2503e35 RH |
1683 | if (u && !unit_log_level_test(u, level)) |
1684 | return -ERRNO_VALUE(error); | |
1685 | ||
f9f88198 YW |
1686 | va_start(ap, format); |
1687 | if (u) | |
1688 | r = log_object_internalv(level, error, file, line, func, | |
1689 | u->manager->unit_log_field, | |
1690 | u->id, | |
1691 | u->manager->invocation_log_field, | |
1692 | u->invocation_id_string, | |
1693 | format, ap); | |
1694 | else | |
1695 | r = log_internalv(level, error, file, line, func, format, ap); | |
1696 | va_end(ap); | |
49365733 | 1697 | |
f9f88198 | 1698 | return r; |
49365733 LP |
1699 | } |
1700 | ||
97a3f4ee | 1701 | static bool unit_test_condition(Unit *u) { |
a0b191b7 LP |
1702 | _cleanup_strv_free_ char **env = NULL; |
1703 | int r; | |
1704 | ||
90bbc946 LP |
1705 | assert(u); |
1706 | ||
ac155bb8 | 1707 | dual_timestamp_get(&u->condition_timestamp); |
90bbc946 | 1708 | |
a0b191b7 LP |
1709 | r = manager_get_effective_environment(u->manager, &env); |
1710 | if (r < 0) { | |
1711 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
1712 | u->condition_result = CONDITION_ERROR; | |
1713 | } else | |
1714 | u->condition_result = condition_test_list( | |
1715 | u->conditions, | |
1716 | env, | |
1717 | condition_type_to_string, | |
1718 | log_unit_internal, | |
1719 | u); | |
e18f8852 | 1720 | |
a0b191b7 | 1721 | unit_add_to_dbus_queue(u); |
ac155bb8 | 1722 | return u->condition_result; |
90bbc946 LP |
1723 | } |
1724 | ||
97a3f4ee | 1725 | static bool unit_test_assert(Unit *u) { |
a0b191b7 LP |
1726 | _cleanup_strv_free_ char **env = NULL; |
1727 | int r; | |
1728 | ||
59fccdc5 LP |
1729 | assert(u); |
1730 | ||
1731 | dual_timestamp_get(&u->assert_timestamp); | |
59fccdc5 | 1732 | |
a0b191b7 LP |
1733 | r = manager_get_effective_environment(u->manager, &env); |
1734 | if (r < 0) { | |
1735 | log_unit_error_errno(u, r, "Failed to determine effective environment: %m"); | |
1736 | u->assert_result = CONDITION_ERROR; | |
1737 | } else | |
1738 | u->assert_result = condition_test_list( | |
1739 | u->asserts, | |
1740 | env, | |
1741 | assert_type_to_string, | |
1742 | log_unit_internal, | |
1743 | u); | |
e18f8852 | 1744 | |
a0b191b7 | 1745 | unit_add_to_dbus_queue(u); |
59fccdc5 LP |
1746 | return u->assert_result; |
1747 | } | |
1748 | ||
04d232d8 ZJS |
1749 | void unit_status_printf(Unit *u, StatusType status_type, const char *status, const char *format, const char *ident) { |
1750 | if (log_get_show_color()) { | |
1751 | if (u->manager->status_unit_format == STATUS_UNIT_FORMAT_COMBINED && strchr(ident, ' ')) | |
1752 | ident = strjoina(ANSI_HIGHLIGHT, u->id, ANSI_NORMAL, " - ", u->description); | |
1753 | else | |
1754 | ident = strjoina(ANSI_HIGHLIGHT, ident, ANSI_NORMAL); | |
1755 | } | |
5b262f74 | 1756 | |
df446f96 | 1757 | DISABLE_WARNING_FORMAT_NONLITERAL; |
04d232d8 | 1758 | manager_status_printf(u->manager, status_type, status, format, ident); |
df446f96 LP |
1759 | REENABLE_WARNING; |
1760 | } | |
1761 | ||
97a3f4ee | 1762 | int unit_test_start_limit(Unit *u) { |
429926e9 TR |
1763 | const char *reason; |
1764 | ||
6bf0f408 LP |
1765 | assert(u); |
1766 | ||
7bf081a1 | 1767 | if (ratelimit_below(&u->start_ratelimit)) { |
6bf0f408 LP |
1768 | u->start_limit_hit = false; |
1769 | return 0; | |
1770 | } | |
1771 | ||
1772 | log_unit_warning(u, "Start request repeated too quickly."); | |
1773 | u->start_limit_hit = true; | |
1774 | ||
429926e9 TR |
1775 | reason = strjoina("unit ", u->id, " failed"); |
1776 | ||
36c4dc08 LP |
1777 | emergency_action(u->manager, u->start_limit_action, |
1778 | EMERGENCY_ACTION_IS_WATCHDOG|EMERGENCY_ACTION_WARN, | |
1779 | u->reboot_arg, -1, reason); | |
1780 | ||
1781 | return -ECANCELED; | |
6bf0f408 LP |
1782 | } |
1783 | ||
c891efaf | 1784 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1785 | assert(u); |
c891efaf FB |
1786 | |
1787 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1788 | return false; | |
1789 | ||
1790 | /* For some reasons units remaining in the same process group | |
1791 | * as PID 1 fail to acquire the console even if it's not used | |
1792 | * by any process. So skip the confirmation question for them. */ | |
1793 | return !unit_get_exec_context(u)->same_pgrp; | |
1794 | } | |
1795 | ||
631b676b LP |
1796 | static bool unit_verify_deps(Unit *u) { |
1797 | Unit *other; | |
631b676b LP |
1798 | |
1799 | assert(u); | |
1800 | ||
defe63b0 LP |
1801 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined |
1802 | * with After=. We do not check Requires= or Requisite= here as they only should have an effect on | |
1803 | * the job processing, but do not have any effect afterwards. We don't check BindsTo= dependencies | |
1804 | * that are not used in conjunction with After= as for them any such check would make things entirely | |
1805 | * racy. */ | |
631b676b | 1806 | |
15ed3c3a | 1807 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { |
631b676b | 1808 | |
15ed3c3a | 1809 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other)) |
631b676b LP |
1810 | continue; |
1811 | ||
1812 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1813 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1814 | return false; | |
1815 | } | |
1816 | } | |
1817 | ||
1818 | return true; | |
1819 | } | |
1820 | ||
9adb6959 | 1821 | /* Errors that aren't really errors: |
6bf0f408 | 1822 | * -EALREADY: Unit is already started. |
9adb6959 | 1823 | * -ECOMM: Condition failed |
6bf0f408 | 1824 | * -EAGAIN: An operation is already in progress. Retry later. |
9adb6959 LP |
1825 | * |
1826 | * Errors that are real errors: | |
1827 | * -EBADR: This unit type does not support starting. | |
2de9b979 | 1828 | * -ECANCELED: Start limit hit, too many requests for now |
6bf0f408 LP |
1829 | * -EPROTO: Assert failed |
1830 | * -EINVAL: Unit not loaded | |
1831 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1832 | * -ENOLINK: The necessary dependencies are not fulfilled. |
d4fd1cf2 | 1833 | * -ESTALE: This unit has been started before and can't be started a second time |
a4191c9f | 1834 | * -ENOENT: This is a triggering unit and unit to trigger is not loaded |
87f0e418 LP |
1835 | */ |
1836 | int unit_start(Unit *u) { | |
1837 | UnitActiveState state; | |
92ab323c | 1838 | Unit *following; |
87f0e418 LP |
1839 | |
1840 | assert(u); | |
1841 | ||
5766aca8 LP |
1842 | /* If this is already started, then this will succeed. Note that this will even succeed if this unit |
1843 | * is not startable by the user. This is relied on to detect when we need to wait for units and when | |
1844 | * waiting is finished. */ | |
87f0e418 LP |
1845 | state = unit_active_state(u); |
1846 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1847 | return -EALREADY; | |
380dc8b0 LP |
1848 | if (state == UNIT_MAINTENANCE) |
1849 | return -EAGAIN; | |
87f0e418 | 1850 | |
6bf0f408 LP |
1851 | /* Units that aren't loaded cannot be started */ |
1852 | if (u->load_state != UNIT_LOADED) | |
1853 | return -EINVAL; | |
1854 | ||
d4fd1cf2 LP |
1855 | /* Refuse starting scope units more than once */ |
1856 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_enter_timestamp)) | |
1857 | return -ESTALE; | |
1858 | ||
5766aca8 LP |
1859 | /* If the conditions failed, don't do anything at all. If we already are activating this call might |
1860 | * still be useful to speed up activation in case there is some hold-off time, but we don't want to | |
1861 | * recheck the condition in that case. */ | |
a82e5507 | 1862 | if (state != UNIT_ACTIVATING && |
5af6aa58 | 1863 | !unit_test_condition(u)) |
5766aca8 | 1864 | return log_unit_debug_errno(u, SYNTHETIC_ERRNO(ECOMM), "Starting requested but condition failed. Not starting unit."); |
52661efd | 1865 | |
59fccdc5 LP |
1866 | /* If the asserts failed, fail the entire job */ |
1867 | if (state != UNIT_ACTIVATING && | |
5766aca8 LP |
1868 | !unit_test_assert(u)) |
1869 | return log_unit_notice_errno(u, SYNTHETIC_ERRNO(EPROTO), "Starting requested but asserts failed."); | |
59fccdc5 | 1870 | |
5766aca8 LP |
1871 | /* Units of types that aren't supported cannot be started. Note that we do this test only after the |
1872 | * condition checks, so that we rather return condition check errors (which are usually not | |
1873 | * considered a true failure) than "not supported" errors (which are considered a failure). | |
d11a7645 | 1874 | */ |
96cf3ec9 | 1875 | if (!unit_type_supported(u->type)) |
d11a7645 LP |
1876 | return -EOPNOTSUPP; |
1877 | ||
5766aca8 LP |
1878 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine |
1879 | * should have taken care of this already, but let's check this here again. After all, our | |
1880 | * dependencies might not be in effect anymore, due to a reload or due to a failed condition. */ | |
631b676b LP |
1881 | if (!unit_verify_deps(u)) |
1882 | return -ENOLINK; | |
1883 | ||
92ab323c | 1884 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1885 | following = unit_following(u); |
1886 | if (following) { | |
f2341e0a | 1887 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1888 | return unit_start(following); |
1889 | } | |
1890 | ||
1891 | /* If it is stopped, but we cannot start it, then fail */ | |
1892 | if (!UNIT_VTABLE(u)->start) | |
1893 | return -EBADR; | |
1894 | ||
5766aca8 LP |
1895 | /* We don't suppress calls to ->start() here when we are already starting, to allow this request to |
1896 | * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it | |
1897 | * waits for a holdoff timer to elapse before it will start again. */ | |
87f0e418 | 1898 | |
c1e1601e | 1899 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 1900 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 1901 | |
d1a34ae9 | 1902 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1903 | } |
1904 | ||
1905 | bool unit_can_start(Unit *u) { | |
1906 | assert(u); | |
1907 | ||
8ff4d2ab LP |
1908 | if (u->load_state != UNIT_LOADED) |
1909 | return false; | |
1910 | ||
96cf3ec9 | 1911 | if (!unit_type_supported(u->type)) |
8ff4d2ab LP |
1912 | return false; |
1913 | ||
d4fd1cf2 LP |
1914 | /* Scope units may be started only once */ |
1915 | if (UNIT_VTABLE(u)->once_only && dual_timestamp_is_set(&u->inactive_exit_timestamp)) | |
1916 | return false; | |
1917 | ||
87f0e418 LP |
1918 | return !!UNIT_VTABLE(u)->start; |
1919 | } | |
1920 | ||
2528a7a6 LP |
1921 | bool unit_can_isolate(Unit *u) { |
1922 | assert(u); | |
1923 | ||
1924 | return unit_can_start(u) && | |
ac155bb8 | 1925 | u->allow_isolate; |
2528a7a6 LP |
1926 | } |
1927 | ||
87f0e418 LP |
1928 | /* Errors: |
1929 | * -EBADR: This unit type does not support stopping. | |
1930 | * -EALREADY: Unit is already stopped. | |
1931 | * -EAGAIN: An operation is already in progress. Retry later. | |
1932 | */ | |
1933 | int unit_stop(Unit *u) { | |
1934 | UnitActiveState state; | |
92ab323c | 1935 | Unit *following; |
87f0e418 LP |
1936 | |
1937 | assert(u); | |
1938 | ||
87f0e418 | 1939 | state = unit_active_state(u); |
fdf20a31 | 1940 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1941 | return -EALREADY; |
1942 | ||
0faacd47 LP |
1943 | following = unit_following(u); |
1944 | if (following) { | |
f2341e0a | 1945 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1946 | return unit_stop(following); |
1947 | } | |
1948 | ||
7898b0cf LP |
1949 | if (!UNIT_VTABLE(u)->stop) |
1950 | return -EBADR; | |
1951 | ||
c1e1601e | 1952 | unit_add_to_dbus_queue(u); |
d9e45bc3 | 1953 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
9e58ff9c | 1954 | |
d1a34ae9 | 1955 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1956 | } |
1957 | ||
f5869324 LP |
1958 | bool unit_can_stop(Unit *u) { |
1959 | assert(u); | |
1960 | ||
39c79477 ZJS |
1961 | /* Note: if we return true here, it does not mean that the unit may be successfully stopped. |
1962 | * Extrinsic units follow external state and they may stop following external state changes | |
1963 | * (hence we return true here), but an attempt to do this through the manager will fail. */ | |
1964 | ||
96cf3ec9 | 1965 | if (!unit_type_supported(u->type)) |
f5869324 LP |
1966 | return false; |
1967 | ||
1968 | if (u->perpetual) | |
1969 | return false; | |
1970 | ||
1971 | return !!UNIT_VTABLE(u)->stop; | |
1972 | } | |
1973 | ||
87f0e418 LP |
1974 | /* Errors: |
1975 | * -EBADR: This unit type does not support reloading. | |
1976 | * -ENOEXEC: Unit is not started. | |
1977 | * -EAGAIN: An operation is already in progress. Retry later. | |
1978 | */ | |
1979 | int unit_reload(Unit *u) { | |
1980 | UnitActiveState state; | |
92ab323c | 1981 | Unit *following; |
87f0e418 LP |
1982 | |
1983 | assert(u); | |
1984 | ||
ac155bb8 | 1985 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1986 | return -EINVAL; |
1987 | ||
87f0e418 LP |
1988 | if (!unit_can_reload(u)) |
1989 | return -EBADR; | |
1990 | ||
1991 | state = unit_active_state(u); | |
e364ad06 | 1992 | if (state == UNIT_RELOADING) |
6255af75 | 1993 | return -EAGAIN; |
87f0e418 | 1994 | |
d85ff944 YW |
1995 | if (state != UNIT_ACTIVE) |
1996 | return log_unit_warning_errno(u, SYNTHETIC_ERRNO(ENOEXEC), "Unit cannot be reloaded because it is inactive."); | |
87f0e418 | 1997 | |
e48614c4 ZJS |
1998 | following = unit_following(u); |
1999 | if (following) { | |
f2341e0a | 2000 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
2001 | return unit_reload(following); |
2002 | } | |
2003 | ||
c1e1601e | 2004 | unit_add_to_dbus_queue(u); |
82a2b6bb | 2005 | |
f54bcca5 JR |
2006 | if (!UNIT_VTABLE(u)->reload) { |
2007 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
2ad2e41a | 2008 | unit_notify(u, unit_active_state(u), unit_active_state(u), 0); |
f54bcca5 JR |
2009 | return 0; |
2010 | } | |
2011 | ||
d9e45bc3 MS |
2012 | unit_cgroup_freezer_action(u, FREEZER_THAW); |
2013 | ||
d1a34ae9 | 2014 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
2015 | } |
2016 | ||
2017 | bool unit_can_reload(Unit *u) { | |
2018 | assert(u); | |
2019 | ||
f54bcca5 JR |
2020 | if (UNIT_VTABLE(u)->can_reload) |
2021 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 2022 | |
15ed3c3a | 2023 | if (unit_has_dependency(u, UNIT_ATOM_PROPAGATES_RELOAD_TO, NULL)) |
87f0e418 LP |
2024 | return true; |
2025 | ||
f54bcca5 | 2026 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
2027 | } |
2028 | ||
a3c1168a | 2029 | bool unit_is_unneeded(Unit *u) { |
15ed3c3a | 2030 | Unit *other; |
f3bff0eb LP |
2031 | assert(u); |
2032 | ||
ac155bb8 | 2033 | if (!u->stop_when_unneeded) |
a3c1168a | 2034 | return false; |
f3bff0eb | 2035 | |
a3c1168a | 2036 | /* Don't clean up while the unit is transitioning or is even inactive. */ |
116654d2 | 2037 | if (unit_active_state(u) != UNIT_ACTIVE) |
a3c1168a LP |
2038 | return false; |
2039 | if (u->job) | |
2040 | return false; | |
f3bff0eb | 2041 | |
15ed3c3a | 2042 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_PINS_STOP_WHEN_UNNEEDED) { |
fda09318 | 2043 | /* If a dependent unit has a job queued, is active or transitioning, or is marked for |
a3c1168a | 2044 | * restart, then don't clean this one up. */ |
b81884e7 | 2045 | |
15ed3c3a LP |
2046 | if (other->job) |
2047 | return false; | |
a3c1168a | 2048 | |
15ed3c3a LP |
2049 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
2050 | return false; | |
a3c1168a | 2051 | |
15ed3c3a LP |
2052 | if (unit_will_restart(other)) |
2053 | return false; | |
bea355da LP |
2054 | } |
2055 | ||
a3c1168a LP |
2056 | return true; |
2057 | } | |
f3bff0eb | 2058 | |
0bc488c9 LP |
2059 | bool unit_is_upheld_by_active(Unit *u, Unit **ret_culprit) { |
2060 | Unit *other; | |
2061 | ||
2062 | assert(u); | |
2063 | ||
2064 | /* Checks if the unit needs to be started because it currently is not running, but some other unit | |
2065 | * that is active declared an Uphold= dependencies on it */ | |
2066 | ||
2067 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) || u->job) { | |
2068 | if (ret_culprit) | |
2069 | *ret_culprit = NULL; | |
2070 | return false; | |
2071 | } | |
2072 | ||
2073 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_START_STEADILY) { | |
2074 | if (other->job) | |
2075 | continue; | |
2076 | ||
2077 | if (UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
2078 | if (ret_culprit) | |
2079 | *ret_culprit = other; | |
2080 | return true; | |
2081 | } | |
2082 | } | |
2083 | ||
2084 | if (ret_culprit) | |
2085 | *ret_culprit = NULL; | |
2086 | return false; | |
2087 | } | |
2088 | ||
56c59592 LP |
2089 | bool unit_is_bound_by_inactive(Unit *u, Unit **ret_culprit) { |
2090 | Unit *other; | |
2091 | ||
2092 | assert(u); | |
2093 | ||
2094 | /* Checks whether this unit is bound to another unit that is inactive, i.e. whether we should stop | |
7802194a | 2095 | * because the other unit is down. */ |
56c59592 LP |
2096 | |
2097 | if (unit_active_state(u) != UNIT_ACTIVE || u->job) { | |
2098 | /* Don't clean up while the unit is transitioning or is even inactive. */ | |
2099 | if (ret_culprit) | |
2100 | *ret_culprit = NULL; | |
2101 | return false; | |
2102 | } | |
2103 | ||
2104 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_CANNOT_BE_ACTIVE_WITHOUT) { | |
2105 | if (other->job) | |
2106 | continue; | |
2107 | ||
2108 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) { | |
2109 | if (*ret_culprit) | |
2110 | *ret_culprit = other; | |
2111 | ||
2112 | return true; | |
2113 | } | |
2114 | } | |
2115 | ||
2116 | if (ret_culprit) | |
2117 | *ret_culprit = NULL; | |
2118 | return false; | |
2119 | } | |
2120 | ||
a3c1168a | 2121 | static void check_unneeded_dependencies(Unit *u) { |
15ed3c3a | 2122 | Unit *other; |
a3c1168a LP |
2123 | assert(u); |
2124 | ||
2125 | /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */ | |
2126 | ||
15ed3c3a LP |
2127 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_STOP_WHEN_UNNEEDED_QUEUE) |
2128 | unit_submit_to_stop_when_unneeded_queue(other); | |
f3bff0eb LP |
2129 | } |
2130 | ||
0bc488c9 LP |
2131 | static void check_uphold_dependencies(Unit *u) { |
2132 | Unit *other; | |
2133 | assert(u); | |
2134 | ||
2135 | /* Add all units this unit depends on to the queue that processes Uphold= behaviour. */ | |
2136 | ||
2137 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_START_WHEN_UPHELD_QUEUE) | |
2138 | unit_submit_to_start_when_upheld_queue(other); | |
2139 | } | |
2140 | ||
56c59592 | 2141 | static void check_bound_by_dependencies(Unit *u) { |
ff502445 | 2142 | Unit *other; |
ff502445 LP |
2143 | assert(u); |
2144 | ||
56c59592 | 2145 | /* Add all units this unit depends on to the queue that processes BindsTo= stop behaviour. */ |
ff502445 | 2146 | |
56c59592 LP |
2147 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_ADD_CANNOT_BE_ACTIVE_WITHOUT_QUEUE) |
2148 | unit_submit_to_stop_when_bound_queue(other); | |
ff502445 LP |
2149 | } |
2150 | ||
87f0e418 | 2151 | static void retroactively_start_dependencies(Unit *u) { |
87f0e418 LP |
2152 | Unit *other; |
2153 | ||
2154 | assert(u); | |
2155 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
2156 | ||
15ed3c3a LP |
2157 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_REPLACE) /* Requires= + BindsTo= */ |
2158 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
b81884e7 | 2159 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2160 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL, NULL); |
b81884e7 | 2161 | |
15ed3c3a LP |
2162 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_START_FAIL) /* Wants= */ |
2163 | if (!unit_has_dependency(u, UNIT_ATOM_AFTER, other) && | |
b81884e7 | 2164 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
50cbaba4 | 2165 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL, NULL); |
87f0e418 | 2166 | |
15ed3c3a | 2167 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_START) /* Conflicts= (and inverse) */ |
b81884e7 | 2168 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2169 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
87f0e418 LP |
2170 | } |
2171 | ||
2172 | static void retroactively_stop_dependencies(Unit *u) { | |
87f0e418 LP |
2173 | Unit *other; |
2174 | ||
2175 | assert(u); | |
2176 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
2177 | ||
b81884e7 | 2178 | /* Pull down units which are bound to us recursively if enabled */ |
15ed3c3a | 2179 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_RETROACTIVE_STOP_ON_STOP) /* BoundBy= */ |
b81884e7 | 2180 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
50cbaba4 | 2181 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL, NULL); |
cd0504d0 MS |
2182 | } |
2183 | ||
294446dc LP |
2184 | void unit_start_on_failure( |
2185 | Unit *u, | |
2186 | const char *dependency_name, | |
2187 | UnitDependencyAtom atom, | |
2188 | JobMode job_mode) { | |
2189 | ||
15ed3c3a | 2190 | bool logged = false; |
c0daa706 | 2191 | Unit *other; |
7f66b026 | 2192 | int r; |
c0daa706 LP |
2193 | |
2194 | assert(u); | |
294446dc LP |
2195 | assert(dependency_name); |
2196 | assert(IN_SET(atom, UNIT_ATOM_ON_SUCCESS, UNIT_ATOM_ON_FAILURE)); | |
2197 | ||
2198 | /* Act on OnFailure= and OnSuccess= dependencies */ | |
c0daa706 | 2199 | |
294446dc | 2200 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { |
7f66b026 | 2201 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
222ae6a8 | 2202 | |
15ed3c3a | 2203 | if (!logged) { |
294446dc | 2204 | log_unit_info(u, "Triggering %s dependencies.", dependency_name); |
15ed3c3a LP |
2205 | logged = true; |
2206 | } | |
2207 | ||
294446dc | 2208 | r = manager_add_job(u->manager, JOB_START, other, job_mode, NULL, &error, NULL); |
c1b6628d | 2209 | if (r < 0) |
294446dc LP |
2210 | log_unit_warning_errno( |
2211 | u, r, "Failed to enqueue %s job, ignoring: %s", | |
2212 | dependency_name, bus_error_message(&error, r)); | |
222ae6a8 | 2213 | } |
294446dc LP |
2214 | |
2215 | if (logged) | |
2216 | log_unit_debug(u, "Triggering %s dependencies done.", dependency_name); | |
c0daa706 LP |
2217 | } |
2218 | ||
3ecaa09b LP |
2219 | void unit_trigger_notify(Unit *u) { |
2220 | Unit *other; | |
3ecaa09b LP |
2221 | |
2222 | assert(u); | |
2223 | ||
15ed3c3a | 2224 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_TRIGGERED_BY) |
3ecaa09b LP |
2225 | if (UNIT_VTABLE(other)->trigger_notify) |
2226 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2227 | } | |
2228 | ||
37109b85 ZJS |
2229 | static int raise_level(int log_level, bool condition_info, bool condition_notice) { |
2230 | if (condition_notice && log_level > LOG_NOTICE) | |
2231 | return LOG_NOTICE; | |
2232 | if (condition_info && log_level > LOG_INFO) | |
2233 | return LOG_INFO; | |
2234 | return log_level; | |
2235 | } | |
2236 | ||
915b1d01 | 2237 | static int unit_log_resources(Unit *u) { |
bc40a20e LP |
2238 | struct iovec iovec[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX + _CGROUP_IO_ACCOUNTING_METRIC_MAX + 4]; |
2239 | bool any_traffic = false, have_ip_accounting = false, any_io = false, have_io_accounting = false; | |
2240 | _cleanup_free_ char *igress = NULL, *egress = NULL, *rr = NULL, *wr = NULL; | |
162392b7 | 2241 | int log_level = LOG_DEBUG; /* May be raised if resources consumed over a threshold */ |
915b1d01 | 2242 | size_t n_message_parts = 0, n_iovec = 0; |
bc40a20e | 2243 | char* message_parts[1 + 2 + 2 + 1], *t; |
915b1d01 | 2244 | nsec_t nsec = NSEC_INFINITY; |
915b1d01 LP |
2245 | int r; |
2246 | const char* const ip_fields[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = { | |
2247 | [CGROUP_IP_INGRESS_BYTES] = "IP_METRIC_INGRESS_BYTES", | |
2248 | [CGROUP_IP_INGRESS_PACKETS] = "IP_METRIC_INGRESS_PACKETS", | |
2249 | [CGROUP_IP_EGRESS_BYTES] = "IP_METRIC_EGRESS_BYTES", | |
2250 | [CGROUP_IP_EGRESS_PACKETS] = "IP_METRIC_EGRESS_PACKETS", | |
2251 | }; | |
bc40a20e LP |
2252 | const char* const io_fields[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = { |
2253 | [CGROUP_IO_READ_BYTES] = "IO_METRIC_READ_BYTES", | |
2254 | [CGROUP_IO_WRITE_BYTES] = "IO_METRIC_WRITE_BYTES", | |
2255 | [CGROUP_IO_READ_OPERATIONS] = "IO_METRIC_READ_OPERATIONS", | |
2256 | [CGROUP_IO_WRITE_OPERATIONS] = "IO_METRIC_WRITE_OPERATIONS", | |
2257 | }; | |
915b1d01 LP |
2258 | |
2259 | assert(u); | |
2260 | ||
2261 | /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource | |
2262 | * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced | |
2263 | * information and the complete data in structured fields. */ | |
2264 | ||
2265 | (void) unit_get_cpu_usage(u, &nsec); | |
2266 | if (nsec != NSEC_INFINITY) { | |
2267 | char buf[FORMAT_TIMESPAN_MAX] = ""; | |
2268 | ||
2269 | /* Format the CPU time for inclusion in the structured log message */ | |
2270 | if (asprintf(&t, "CPU_USAGE_NSEC=%" PRIu64, nsec) < 0) { | |
2271 | r = log_oom(); | |
2272 | goto finish; | |
2273 | } | |
2274 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2275 | ||
2276 | /* Format the CPU time for inclusion in the human language message string */ | |
2277 | format_timespan(buf, sizeof(buf), nsec / NSEC_PER_USEC, USEC_PER_MSEC); | |
ec9d636b | 2278 | t = strjoin("consumed ", buf, " CPU time"); |
915b1d01 LP |
2279 | if (!t) { |
2280 | r = log_oom(); | |
2281 | goto finish; | |
2282 | } | |
2283 | ||
2284 | message_parts[n_message_parts++] = t; | |
37109b85 ZJS |
2285 | |
2286 | log_level = raise_level(log_level, | |
2287 | nsec > NOTICEWORTHY_CPU_NSEC, | |
2288 | nsec > MENTIONWORTHY_CPU_NSEC); | |
915b1d01 LP |
2289 | } |
2290 | ||
bc40a20e LP |
2291 | for (CGroupIOAccountingMetric k = 0; k < _CGROUP_IO_ACCOUNTING_METRIC_MAX; k++) { |
2292 | char buf[FORMAT_BYTES_MAX] = ""; | |
2293 | uint64_t value = UINT64_MAX; | |
2294 | ||
2295 | assert(io_fields[k]); | |
2296 | ||
2297 | (void) unit_get_io_accounting(u, k, k > 0, &value); | |
2298 | if (value == UINT64_MAX) | |
2299 | continue; | |
2300 | ||
2301 | have_io_accounting = true; | |
2302 | if (value > 0) | |
2303 | any_io = true; | |
2304 | ||
2305 | /* Format IO accounting data for inclusion in the structured log message */ | |
2306 | if (asprintf(&t, "%s=%" PRIu64, io_fields[k], value) < 0) { | |
2307 | r = log_oom(); | |
2308 | goto finish; | |
2309 | } | |
2310 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2311 | ||
2312 | /* Format the IO accounting data for inclusion in the human language message string, but only | |
2313 | * for the bytes counters (and not for the operations counters) */ | |
2314 | if (k == CGROUP_IO_READ_BYTES) { | |
2315 | assert(!rr); | |
2316 | rr = strjoin("read ", format_bytes(buf, sizeof(buf), value), " from disk"); | |
2317 | if (!rr) { | |
2318 | r = log_oom(); | |
2319 | goto finish; | |
2320 | } | |
2321 | } else if (k == CGROUP_IO_WRITE_BYTES) { | |
2322 | assert(!wr); | |
2323 | wr = strjoin("written ", format_bytes(buf, sizeof(buf), value), " to disk"); | |
2324 | if (!wr) { | |
2325 | r = log_oom(); | |
2326 | goto finish; | |
2327 | } | |
2328 | } | |
37109b85 ZJS |
2329 | |
2330 | if (IN_SET(k, CGROUP_IO_READ_BYTES, CGROUP_IO_WRITE_BYTES)) | |
2331 | log_level = raise_level(log_level, | |
2332 | value > MENTIONWORTHY_IO_BYTES, | |
2333 | value > NOTICEWORTHY_IO_BYTES); | |
bc40a20e LP |
2334 | } |
2335 | ||
2336 | if (have_io_accounting) { | |
2337 | if (any_io) { | |
2338 | if (rr) | |
2339 | message_parts[n_message_parts++] = TAKE_PTR(rr); | |
2340 | if (wr) | |
2341 | message_parts[n_message_parts++] = TAKE_PTR(wr); | |
2342 | ||
2343 | } else { | |
2344 | char *k; | |
2345 | ||
2346 | k = strdup("no IO"); | |
2347 | if (!k) { | |
2348 | r = log_oom(); | |
2349 | goto finish; | |
2350 | } | |
2351 | ||
2352 | message_parts[n_message_parts++] = k; | |
2353 | } | |
2354 | } | |
2355 | ||
12375b95 | 2356 | for (CGroupIPAccountingMetric m = 0; m < _CGROUP_IP_ACCOUNTING_METRIC_MAX; m++) { |
915b1d01 LP |
2357 | char buf[FORMAT_BYTES_MAX] = ""; |
2358 | uint64_t value = UINT64_MAX; | |
2359 | ||
2360 | assert(ip_fields[m]); | |
2361 | ||
2362 | (void) unit_get_ip_accounting(u, m, &value); | |
2363 | if (value == UINT64_MAX) | |
2364 | continue; | |
82044702 LP |
2365 | |
2366 | have_ip_accounting = true; | |
a87b1faa LP |
2367 | if (value > 0) |
2368 | any_traffic = true; | |
915b1d01 LP |
2369 | |
2370 | /* Format IP accounting data for inclusion in the structured log message */ | |
2371 | if (asprintf(&t, "%s=%" PRIu64, ip_fields[m], value) < 0) { | |
2372 | r = log_oom(); | |
2373 | goto finish; | |
2374 | } | |
2375 | iovec[n_iovec++] = IOVEC_MAKE_STRING(t); | |
2376 | ||
2377 | /* Format the IP accounting data for inclusion in the human language message string, but only for the | |
2378 | * bytes counters (and not for the packets counters) */ | |
a87b1faa LP |
2379 | if (m == CGROUP_IP_INGRESS_BYTES) { |
2380 | assert(!igress); | |
ec9d636b | 2381 | igress = strjoin("received ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2382 | if (!igress) { |
2383 | r = log_oom(); | |
2384 | goto finish; | |
2385 | } | |
2386 | } else if (m == CGROUP_IP_EGRESS_BYTES) { | |
2387 | assert(!egress); | |
ec9d636b | 2388 | egress = strjoin("sent ", format_bytes(buf, sizeof(buf), value), " IP traffic"); |
a87b1faa LP |
2389 | if (!egress) { |
2390 | r = log_oom(); | |
2391 | goto finish; | |
2392 | } | |
2393 | } | |
37109b85 ZJS |
2394 | |
2395 | if (IN_SET(m, CGROUP_IP_INGRESS_BYTES, CGROUP_IP_EGRESS_BYTES)) | |
2396 | log_level = raise_level(log_level, | |
2397 | value > MENTIONWORTHY_IP_BYTES, | |
2398 | value > NOTICEWORTHY_IP_BYTES); | |
a87b1faa LP |
2399 | } |
2400 | ||
c2503e35 RH |
2401 | /* This check is here because it is the earliest point following all possible log_level assignments. If |
2402 | * log_level is assigned anywhere after this point, move this check. */ | |
2403 | if (!unit_log_level_test(u, log_level)) { | |
2404 | r = 0; | |
2405 | goto finish; | |
2406 | } | |
2407 | ||
82044702 LP |
2408 | if (have_ip_accounting) { |
2409 | if (any_traffic) { | |
2410 | if (igress) | |
2411 | message_parts[n_message_parts++] = TAKE_PTR(igress); | |
2412 | if (egress) | |
2413 | message_parts[n_message_parts++] = TAKE_PTR(egress); | |
a87b1faa | 2414 | |
82044702 LP |
2415 | } else { |
2416 | char *k; | |
915b1d01 | 2417 | |
82044702 LP |
2418 | k = strdup("no IP traffic"); |
2419 | if (!k) { | |
2420 | r = log_oom(); | |
2421 | goto finish; | |
2422 | } | |
2423 | ||
2424 | message_parts[n_message_parts++] = k; | |
2425 | } | |
915b1d01 LP |
2426 | } |
2427 | ||
2428 | /* Is there any accounting data available at all? */ | |
2429 | if (n_iovec == 0) { | |
2430 | r = 0; | |
2431 | goto finish; | |
2432 | } | |
2433 | ||
2434 | if (n_message_parts == 0) | |
a87b1faa | 2435 | t = strjoina("MESSAGE=", u->id, ": Completed."); |
915b1d01 | 2436 | else { |
c2b2df60 | 2437 | _cleanup_free_ char *joined = NULL; |
915b1d01 LP |
2438 | |
2439 | message_parts[n_message_parts] = NULL; | |
2440 | ||
2441 | joined = strv_join(message_parts, ", "); | |
2442 | if (!joined) { | |
2443 | r = log_oom(); | |
2444 | goto finish; | |
2445 | } | |
2446 | ||
ec9d636b | 2447 | joined[0] = ascii_toupper(joined[0]); |
a87b1faa | 2448 | t = strjoina("MESSAGE=", u->id, ": ", joined, "."); |
915b1d01 LP |
2449 | } |
2450 | ||
2451 | /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them, | |
2452 | * and hence don't increase n_iovec for them */ | |
2453 | iovec[n_iovec] = IOVEC_MAKE_STRING(t); | |
2454 | iovec[n_iovec + 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR); | |
2455 | ||
2456 | t = strjoina(u->manager->unit_log_field, u->id); | |
2457 | iovec[n_iovec + 2] = IOVEC_MAKE_STRING(t); | |
2458 | ||
2459 | t = strjoina(u->manager->invocation_log_field, u->invocation_id_string); | |
2460 | iovec[n_iovec + 3] = IOVEC_MAKE_STRING(t); | |
2461 | ||
c2503e35 | 2462 | log_unit_struct_iovec(u, log_level, iovec, n_iovec + 4); |
915b1d01 LP |
2463 | r = 0; |
2464 | ||
2465 | finish: | |
12375b95 | 2466 | for (size_t i = 0; i < n_message_parts; i++) |
915b1d01 LP |
2467 | free(message_parts[i]); |
2468 | ||
12375b95 | 2469 | for (size_t i = 0; i < n_iovec; i++) |
915b1d01 LP |
2470 | free(iovec[i].iov_base); |
2471 | ||
2472 | return r; | |
2473 | ||
2474 | } | |
2475 | ||
adefcf28 LP |
2476 | static void unit_update_on_console(Unit *u) { |
2477 | bool b; | |
2478 | ||
2479 | assert(u); | |
2480 | ||
2481 | b = unit_needs_console(u); | |
2482 | if (u->on_console == b) | |
2483 | return; | |
2484 | ||
2485 | u->on_console = b; | |
2486 | if (b) | |
2487 | manager_ref_console(u->manager); | |
2488 | else | |
2489 | manager_unref_console(u->manager); | |
adefcf28 LP |
2490 | } |
2491 | ||
6eb65e7c LP |
2492 | static void unit_emit_audit_start(Unit *u) { |
2493 | assert(u); | |
2494 | ||
2495 | if (u->type != UNIT_SERVICE) | |
2496 | return; | |
2497 | ||
2498 | /* Write audit record if we have just finished starting up */ | |
2499 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); | |
2500 | u->in_audit = true; | |
2501 | } | |
2502 | ||
2503 | static void unit_emit_audit_stop(Unit *u, UnitActiveState state) { | |
2504 | assert(u); | |
2505 | ||
2506 | if (u->type != UNIT_SERVICE) | |
2507 | return; | |
2508 | ||
2509 | if (u->in_audit) { | |
2510 | /* Write audit record if we have just finished shutting down */ | |
2511 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, state == UNIT_INACTIVE); | |
2512 | u->in_audit = false; | |
2513 | } else { | |
2514 | /* Hmm, if there was no start record written write it now, so that we always have a nice pair */ | |
2515 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, state == UNIT_INACTIVE); | |
2516 | ||
2517 | if (state == UNIT_INACTIVE) | |
2518 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); | |
2519 | } | |
2520 | } | |
2521 | ||
16c74914 LP |
2522 | static bool unit_process_job(Job *j, UnitActiveState ns, UnitNotifyFlags flags) { |
2523 | bool unexpected = false; | |
31cd5f63 | 2524 | JobResult result; |
16c74914 LP |
2525 | |
2526 | assert(j); | |
2527 | ||
2528 | if (j->state == JOB_WAITING) | |
2529 | ||
2530 | /* So we reached a different state for this job. Let's see if we can run it now if it failed previously | |
2531 | * due to EAGAIN. */ | |
2532 | job_add_to_run_queue(j); | |
2533 | ||
2534 | /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and | |
2535 | * hence needs to invalidate jobs. */ | |
2536 | ||
2537 | switch (j->type) { | |
2538 | ||
2539 | case JOB_START: | |
2540 | case JOB_VERIFY_ACTIVE: | |
2541 | ||
2542 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
2543 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2544 | else if (j->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
2545 | unexpected = true; | |
2546 | ||
31cd5f63 AZ |
2547 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
2548 | if (ns == UNIT_FAILED) | |
2549 | result = JOB_FAILED; | |
31cd5f63 AZ |
2550 | else |
2551 | result = JOB_DONE; | |
2552 | ||
2553 | job_finish_and_invalidate(j, result, true, false); | |
2554 | } | |
16c74914 LP |
2555 | } |
2556 | ||
2557 | break; | |
2558 | ||
2559 | case JOB_RELOAD: | |
2560 | case JOB_RELOAD_OR_START: | |
2561 | case JOB_TRY_RELOAD: | |
2562 | ||
2563 | if (j->state == JOB_RUNNING) { | |
2564 | if (ns == UNIT_ACTIVE) | |
2565 | job_finish_and_invalidate(j, (flags & UNIT_NOTIFY_RELOAD_FAILURE) ? JOB_FAILED : JOB_DONE, true, false); | |
2566 | else if (!IN_SET(ns, UNIT_ACTIVATING, UNIT_RELOADING)) { | |
2567 | unexpected = true; | |
2568 | ||
2569 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2570 | job_finish_and_invalidate(j, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); | |
2571 | } | |
2572 | } | |
2573 | ||
2574 | break; | |
2575 | ||
2576 | case JOB_STOP: | |
2577 | case JOB_RESTART: | |
2578 | case JOB_TRY_RESTART: | |
2579 | ||
2580 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
2581 | job_finish_and_invalidate(j, JOB_DONE, true, false); | |
2582 | else if (j->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
2583 | unexpected = true; | |
2584 | job_finish_and_invalidate(j, JOB_FAILED, true, false); | |
2585 | } | |
2586 | ||
2587 | break; | |
2588 | ||
2589 | default: | |
2590 | assert_not_reached("Job type unknown"); | |
2591 | } | |
2592 | ||
2593 | return unexpected; | |
2594 | } | |
2595 | ||
2ad2e41a | 2596 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, UnitNotifyFlags flags) { |
429926e9 | 2597 | const char *reason; |
8559b3b7 | 2598 | Manager *m; |
a096ed36 | 2599 | |
87f0e418 LP |
2600 | assert(u); |
2601 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2602 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2603 | |
8559b3b7 LP |
2604 | /* Note that this is called for all low-level state changes, even if they might map to the same high-level |
2605 | * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is | |
2606 | * remounted this function will be called too! */ | |
87f0e418 | 2607 | |
546ac4f0 MS |
2608 | m = u->manager; |
2609 | ||
3c4832ad LP |
2610 | /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in |
2611 | * the bus queue, so that any job change signal queued will force out the unit change signal first. */ | |
2612 | unit_add_to_dbus_queue(u); | |
2613 | ||
e30bbc90 AZ |
2614 | /* Update systemd-oomd on the property/state change */ |
2615 | if (os != ns) { | |
2616 | /* Always send an update if the unit is going into an inactive state so systemd-oomd knows to stop | |
2617 | * monitoring. | |
2618 | * Also send an update whenever the unit goes active; this is to handle a case where an override file | |
2619 | * sets one of the ManagedOOM*= properties to "kill", then later removes it. systemd-oomd needs to | |
2620 | * know to stop monitoring when the unit changes from "kill" -> "auto" on daemon-reload, but we don't | |
2621 | * have the information on the property. Thus, indiscriminately send an update. */ | |
f561e8c6 | 2622 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) || UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
e30bbc90 AZ |
2623 | (void) manager_varlink_send_managed_oom_update(u); |
2624 | } | |
2625 | ||
f755e3b7 | 2626 | /* Update timestamps for state changes */ |
2c289ea8 | 2627 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2628 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2629 | |
bdbf9951 | 2630 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2631 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2632 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2633 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2634 | |
2635 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2636 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2637 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2638 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2639 | } |
87f0e418 | 2640 | |
865cc19a | 2641 | /* Keep track of failed units */ |
8724defe | 2642 | (void) manager_update_failed_units(m, u, ns == UNIT_FAILED); |
f755e3b7 | 2643 | |
d3070fbd LP |
2644 | /* Make sure the cgroup and state files are always removed when we become inactive */ |
2645 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
ff68472a ZJS |
2646 | SET_FLAG(u->markers, |
2647 | (1u << UNIT_MARKER_NEEDS_RELOAD)|(1u << UNIT_MARKER_NEEDS_RESTART), | |
2648 | false); | |
efdb0237 | 2649 | unit_prune_cgroup(u); |
d3070fbd | 2650 | unit_unlink_state_files(u); |
ff68472a ZJS |
2651 | } else if (ns != os && ns == UNIT_RELOADING) |
2652 | SET_FLAG(u->markers, 1u << UNIT_MARKER_NEEDS_RELOAD, false); | |
fb385181 | 2653 | |
adefcf28 | 2654 | unit_update_on_console(u); |
7ed9f6cd | 2655 | |
2c289ea8 | 2656 | if (!MANAGER_IS_RELOADING(m)) { |
a1c7334b LP |
2657 | bool unexpected; |
2658 | ||
2659 | /* Let's propagate state changes to the job */ | |
2660 | if (u->job) | |
2661 | unexpected = unit_process_job(u->job, ns, flags); | |
2662 | else | |
2663 | unexpected = true; | |
f3bff0eb | 2664 | |
a1c7334b LP |
2665 | /* If this state change happened without being requested by a job, then let's retroactively start or |
2666 | * stop dependencies. We skip that step when deserializing, since we don't want to create any | |
2667 | * additional jobs just because something is already activated. */ | |
bdbf9951 LP |
2668 | |
2669 | if (unexpected) { | |
2670 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2671 | retroactively_start_dependencies(u); | |
2672 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2673 | retroactively_stop_dependencies(u); | |
2674 | } | |
5de9682c | 2675 | |
bdbf9951 | 2676 | if (ns != os && ns == UNIT_FAILED) { |
ed77d407 | 2677 | log_unit_debug(u, "Unit entered failed state."); |
2ad2e41a LP |
2678 | |
2679 | if (!(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
294446dc | 2680 | unit_start_on_failure(u, "OnFailure=", UNIT_ATOM_ON_FAILURE, u->on_failure_job_mode); |
cd6d0a45 | 2681 | } |
e537352b | 2682 | |
256f65d0 LP |
2683 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns) && !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
2684 | /* This unit just finished starting up */ | |
3b2775c5 | 2685 | |
6eb65e7c | 2686 | unit_emit_audit_start(u); |
546ac4f0 | 2687 | manager_send_unit_plymouth(m, u); |
256f65d0 | 2688 | } |
bdbf9951 | 2689 | |
256f65d0 | 2690 | if (UNIT_IS_INACTIVE_OR_FAILED(ns) && !UNIT_IS_INACTIVE_OR_FAILED(os)) { |
915b1d01 | 2691 | /* This unit just stopped/failed. */ |
256f65d0 | 2692 | |
6eb65e7c | 2693 | unit_emit_audit_stop(u, ns); |
915b1d01 | 2694 | unit_log_resources(u); |
cd6d0a45 | 2695 | } |
294446dc LP |
2696 | |
2697 | if (ns == UNIT_INACTIVE && !IN_SET(os, UNIT_FAILED, UNIT_INACTIVE, UNIT_MAINTENANCE) && | |
2698 | !(flags & UNIT_NOTIFY_WILL_AUTO_RESTART)) | |
2699 | unit_start_on_failure(u, "OnSuccess=", UNIT_ATOM_ON_SUCCESS, u->on_success_job_mode); | |
f278026d LP |
2700 | } |
2701 | ||
31dc1ca3 LP |
2702 | manager_recheck_journal(m); |
2703 | manager_recheck_dbus(m); | |
e63ebf71 | 2704 | |
3ecaa09b | 2705 | unit_trigger_notify(u); |
3b2775c5 | 2706 | |
8724defe | 2707 | if (!MANAGER_IS_RELOADING(m)) { |
429926e9 TR |
2708 | if (os != UNIT_FAILED && ns == UNIT_FAILED) { |
2709 | reason = strjoina("unit ", u->id, " failed"); | |
36c4dc08 | 2710 | emergency_action(m, u->failure_action, 0, u->reboot_arg, unit_failure_action_exit_status(u), reason); |
429926e9 TR |
2711 | } else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && ns == UNIT_INACTIVE) { |
2712 | reason = strjoina("unit ", u->id, " succeeded"); | |
36c4dc08 | 2713 | emergency_action(m, u->success_action, 0, u->reboot_arg, unit_success_action_exit_status(u), reason); |
429926e9 | 2714 | } |
ff502445 LP |
2715 | } |
2716 | ||
99e9af25 | 2717 | /* And now, add the unit or depending units to various queues that will act on the new situation if |
48008c1c | 2718 | * needed. These queues generally check for continuous state changes rather than events (like most of |
99e9af25 LP |
2719 | * the state propagation above), and do work deferred instead of instantly, since they typically |
2720 | * don't want to run during reloading, and usually involve checking combined state of multiple units | |
2721 | * at once. */ | |
2722 | ||
2723 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { | |
2724 | /* Stop unneeded units and bound-by units regardless if going down was expected or not */ | |
2725 | check_unneeded_dependencies(u); | |
2726 | check_bound_by_dependencies(u); | |
2727 | ||
2728 | /* Maybe someone wants us to remain up? */ | |
2729 | unit_submit_to_start_when_upheld_queue(u); | |
2730 | ||
2731 | /* Maybe the unit should be GC'ed now? */ | |
2732 | unit_add_to_gc_queue(u); | |
2733 | } | |
2734 | ||
2735 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
2736 | /* Start uphold units regardless if going up was expected or not */ | |
2737 | check_uphold_dependencies(u); | |
2738 | ||
2739 | /* Maybe we finished startup and are now ready for being stopped because unneeded? */ | |
2740 | unit_submit_to_stop_when_unneeded_queue(u); | |
2741 | ||
2742 | /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens | |
2743 | * when something BindsTo= to a Type=oneshot unit, as these units go directly from starting to | |
2744 | * inactive, without ever entering started.) */ | |
2745 | unit_submit_to_stop_when_bound_queue(u); | |
2746 | } | |
87f0e418 LP |
2747 | } |
2748 | ||
f75f613d | 2749 | int unit_watch_pid(Unit *u, pid_t pid, bool exclusive) { |
62a76913 | 2750 | int r; |
a911bb9a | 2751 | |
87f0e418 | 2752 | assert(u); |
62a76913 | 2753 | assert(pid_is_valid(pid)); |
87f0e418 | 2754 | |
62a76913 | 2755 | /* Watch a specific PID */ |
5ba6985b | 2756 | |
f75f613d FB |
2757 | /* Caller might be sure that this PID belongs to this unit only. Let's take this |
2758 | * opportunity to remove any stalled references to this PID as they can be created | |
2759 | * easily (when watching a process which is not our direct child). */ | |
2760 | if (exclusive) | |
2761 | manager_unwatch_pid(u->manager, pid); | |
2762 | ||
d5099efc | 2763 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2764 | if (r < 0) |
2765 | return r; | |
2766 | ||
62a76913 | 2767 | r = hashmap_ensure_allocated(&u->manager->watch_pids, NULL); |
a911bb9a LP |
2768 | if (r < 0) |
2769 | return r; | |
2770 | ||
62a76913 LP |
2771 | /* First try, let's add the unit keyed by "pid". */ |
2772 | r = hashmap_put(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2773 | if (r == -EEXIST) { | |
2774 | Unit **array; | |
2775 | bool found = false; | |
2776 | size_t n = 0; | |
05e343b7 | 2777 | |
62a76913 LP |
2778 | /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points |
2779 | * to an array of Units rather than just a Unit), lists us already. */ | |
a911bb9a | 2780 | |
62a76913 LP |
2781 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); |
2782 | if (array) | |
2783 | for (; array[n]; n++) | |
2784 | if (array[n] == u) | |
2785 | found = true; | |
a911bb9a | 2786 | |
62a76913 LP |
2787 | if (found) /* Found it already? if so, do nothing */ |
2788 | r = 0; | |
2789 | else { | |
2790 | Unit **new_array; | |
2791 | ||
2792 | /* Allocate a new array */ | |
2793 | new_array = new(Unit*, n + 2); | |
2794 | if (!new_array) | |
2795 | return -ENOMEM; | |
2796 | ||
2797 | memcpy_safe(new_array, array, sizeof(Unit*) * n); | |
2798 | new_array[n] = u; | |
2799 | new_array[n+1] = NULL; | |
2800 | ||
2801 | /* Add or replace the old array */ | |
2802 | r = hashmap_replace(u->manager->watch_pids, PID_TO_PTR(-pid), new_array); | |
2803 | if (r < 0) { | |
2804 | free(new_array); | |
2805 | return r; | |
2806 | } | |
2807 | ||
2808 | free(array); | |
2809 | } | |
2810 | } else if (r < 0) | |
2811 | return r; | |
2812 | ||
2813 | r = set_put(u->pids, PID_TO_PTR(pid)); | |
2814 | if (r < 0) | |
2815 | return r; | |
2816 | ||
2817 | return 0; | |
87f0e418 LP |
2818 | } |
2819 | ||
2820 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
62a76913 LP |
2821 | Unit **array; |
2822 | ||
87f0e418 | 2823 | assert(u); |
62a76913 LP |
2824 | assert(pid_is_valid(pid)); |
2825 | ||
2826 | /* First let's drop the unit in case it's keyed as "pid". */ | |
2827 | (void) hashmap_remove_value(u->manager->watch_pids, PID_TO_PTR(pid), u); | |
2828 | ||
2829 | /* Then, let's also drop the unit, in case it's in the array keyed by -pid */ | |
2830 | array = hashmap_get(u->manager->watch_pids, PID_TO_PTR(-pid)); | |
2831 | if (array) { | |
62a76913 | 2832 | /* Let's iterate through the array, dropping our own entry */ |
12375b95 ZJS |
2833 | |
2834 | size_t m = 0; | |
2835 | for (size_t n = 0; array[n]; n++) | |
62a76913 LP |
2836 | if (array[n] != u) |
2837 | array[m++] = array[n]; | |
2838 | array[m] = NULL; | |
2839 | ||
2840 | if (m == 0) { | |
2841 | /* The array is now empty, remove the entire entry */ | |
20c3acfa | 2842 | assert_se(hashmap_remove(u->manager->watch_pids, PID_TO_PTR(-pid)) == array); |
62a76913 LP |
2843 | free(array); |
2844 | } | |
2845 | } | |
87f0e418 | 2846 | |
fea72cc0 | 2847 | (void) set_remove(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2848 | } |
2849 | ||
bd44e61b LP |
2850 | void unit_unwatch_all_pids(Unit *u) { |
2851 | assert(u); | |
2852 | ||
2853 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2854 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2855 | |
efdb0237 | 2856 | u->pids = set_free(u->pids); |
a911bb9a LP |
2857 | } |
2858 | ||
50be4f4a LP |
2859 | static void unit_tidy_watch_pids(Unit *u) { |
2860 | pid_t except1, except2; | |
a911bb9a LP |
2861 | void *e; |
2862 | ||
2863 | assert(u); | |
2864 | ||
2865 | /* Cleans dead PIDs from our list */ | |
2866 | ||
50be4f4a LP |
2867 | except1 = unit_main_pid(u); |
2868 | except2 = unit_control_pid(u); | |
2869 | ||
90e74a66 | 2870 | SET_FOREACH(e, u->pids) { |
fea72cc0 | 2871 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2872 | |
2873 | if (pid == except1 || pid == except2) | |
2874 | continue; | |
2875 | ||
9f5650ae | 2876 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2877 | unit_unwatch_pid(u, pid); |
a911bb9a | 2878 | } |
87f0e418 LP |
2879 | } |
2880 | ||
50be4f4a LP |
2881 | static int on_rewatch_pids_event(sd_event_source *s, void *userdata) { |
2882 | Unit *u = userdata; | |
2883 | ||
2884 | assert(s); | |
2885 | assert(u); | |
2886 | ||
2887 | unit_tidy_watch_pids(u); | |
2888 | unit_watch_all_pids(u); | |
2889 | ||
2890 | /* If the PID set is empty now, then let's finish this off. */ | |
2891 | unit_synthesize_cgroup_empty_event(u); | |
2892 | ||
2893 | return 0; | |
2894 | } | |
2895 | ||
2896 | int unit_enqueue_rewatch_pids(Unit *u) { | |
2897 | int r; | |
2898 | ||
2899 | assert(u); | |
2900 | ||
2901 | if (!u->cgroup_path) | |
2902 | return -ENOENT; | |
2903 | ||
2904 | r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); | |
2905 | if (r < 0) | |
2906 | return r; | |
2907 | if (r > 0) /* On unified we can use proper notifications */ | |
2908 | return 0; | |
2909 | ||
2910 | /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new | |
2911 | * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it | |
2912 | * involves issuing kill(pid, 0) on all processes we watch. */ | |
2913 | ||
2914 | if (!u->rewatch_pids_event_source) { | |
2915 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; | |
2916 | ||
2917 | r = sd_event_add_defer(u->manager->event, &s, on_rewatch_pids_event, u); | |
2918 | if (r < 0) | |
2919 | return log_error_errno(r, "Failed to allocate event source for tidying watched PIDs: %m"); | |
2920 | ||
2921 | r = sd_event_source_set_priority(s, SD_EVENT_PRIORITY_IDLE); | |
2922 | if (r < 0) | |
28b77ab2 | 2923 | return log_error_errno(r, "Failed to adjust priority of event source for tidying watched PIDs: %m"); |
50be4f4a LP |
2924 | |
2925 | (void) sd_event_source_set_description(s, "tidy-watch-pids"); | |
2926 | ||
2927 | u->rewatch_pids_event_source = TAKE_PTR(s); | |
2928 | } | |
2929 | ||
2930 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_ONESHOT); | |
2931 | if (r < 0) | |
2932 | return log_error_errno(r, "Failed to enable event source for tidying watched PIDs: %m"); | |
2933 | ||
2934 | return 0; | |
2935 | } | |
2936 | ||
2937 | void unit_dequeue_rewatch_pids(Unit *u) { | |
2938 | int r; | |
2939 | assert(u); | |
2940 | ||
2941 | if (!u->rewatch_pids_event_source) | |
2942 | return; | |
2943 | ||
2944 | r = sd_event_source_set_enabled(u->rewatch_pids_event_source, SD_EVENT_OFF); | |
2945 | if (r < 0) | |
2946 | log_warning_errno(r, "Failed to disable event source for tidying watched PIDs, ignoring: %m"); | |
2947 | ||
2948 | u->rewatch_pids_event_source = sd_event_source_unref(u->rewatch_pids_event_source); | |
2949 | } | |
2950 | ||
87f0e418 LP |
2951 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2952 | assert(u); | |
2953 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2954 | ||
2955 | switch (j) { | |
2956 | ||
2957 | case JOB_VERIFY_ACTIVE: | |
2958 | case JOB_START: | |
e0209d83 | 2959 | case JOB_NOP: |
f5869324 | 2960 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
86b52a39 | 2961 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueuing |
f5869324 | 2962 | * jobs for it. */ |
87f0e418 LP |
2963 | return true; |
2964 | ||
f5869324 LP |
2965 | case JOB_STOP: |
2966 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
86b52a39 | 2967 | * external events), hence it makes no sense to permit enqueuing such a request either. */ |
f5869324 LP |
2968 | return !u->perpetual; |
2969 | ||
87f0e418 LP |
2970 | case JOB_RESTART: |
2971 | case JOB_TRY_RESTART: | |
f5869324 | 2972 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
2973 | |
2974 | case JOB_RELOAD: | |
3282591d | 2975 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2976 | return unit_can_reload(u); |
2977 | ||
2978 | case JOB_RELOAD_OR_START: | |
2979 | return unit_can_reload(u) && unit_can_start(u); | |
2980 | ||
2981 | default: | |
2982 | assert_not_reached("Invalid job type"); | |
2983 | } | |
2984 | } | |
2985 | ||
eef85c4a LP |
2986 | int unit_add_dependency( |
2987 | Unit *u, | |
2988 | UnitDependency d, | |
2989 | Unit *other, | |
2990 | bool add_reference, | |
2991 | UnitDependencyMask mask) { | |
87f0e418 LP |
2992 | |
2993 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2994 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
be7d9ff7 | 2995 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7e9212bf | 2996 | [UNIT_WANTS] = UNIT_WANTED_BY, |
7f2cddae | 2997 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2998 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
0bc488c9 | 2999 | [UNIT_UPHOLDS] = UNIT_UPHELD_BY, |
be7d9ff7 | 3000 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 3001 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 3002 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 3003 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 3004 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
0bc488c9 | 3005 | [UNIT_UPHELD_BY] = UNIT_UPHOLDS, |
69dd2852 LP |
3006 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
3007 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 3008 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 3009 | [UNIT_AFTER] = UNIT_BEFORE, |
294446dc LP |
3010 | [UNIT_ON_SUCCESS] = UNIT_ON_SUCCESS_OF, |
3011 | [UNIT_ON_SUCCESS_OF] = UNIT_ON_SUCCESS, | |
629b2a6f LP |
3012 | [UNIT_ON_FAILURE] = UNIT_ON_FAILURE_OF, |
3013 | [UNIT_ON_FAILURE_OF] = UNIT_ON_FAILURE, | |
57020a3a | 3014 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, |
4dcc1cb4 | 3015 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 3016 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 3017 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
ffec78c0 LP |
3018 | [UNIT_PROPAGATES_STOP_TO] = UNIT_STOP_PROPAGATED_FROM, |
3019 | [UNIT_STOP_PROPAGATED_FROM] = UNIT_PROPAGATES_STOP_TO, | |
defe63b0 | 3020 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, /* symmetric! 👓 */ |
7e9212bf LP |
3021 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
3022 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, | |
d219a2b0 LP |
3023 | [UNIT_IN_SLICE] = UNIT_SLICE_OF, |
3024 | [UNIT_SLICE_OF] = UNIT_IN_SLICE, | |
87f0e418 | 3025 | }; |
eef85c4a | 3026 | Unit *original_u = u, *original_other = other; |
15ed3c3a | 3027 | UnitDependencyAtom a; |
eef85c4a | 3028 | int r; |
15ed3c3a LP |
3029 | |
3030 | /* Helper to know whether sending a notification is necessary or not: if the dependency is already | |
3031 | * there, no need to notify! */ | |
3032 | bool noop; | |
87f0e418 LP |
3033 | |
3034 | assert(u); | |
3035 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
3036 | assert(other); |
3037 | ||
9f151f29 LP |
3038 | u = unit_follow_merge(u); |
3039 | other = unit_follow_merge(other); | |
15ed3c3a LP |
3040 | a = unit_dependency_to_atom(d); |
3041 | assert(a >= 0); | |
9f151f29 | 3042 | |
15ed3c3a | 3043 | /* We won't allow dependencies on ourselves. We will not consider them an error however. */ |
d1fab3fe | 3044 | if (u == other) { |
15ed3c3a | 3045 | unit_maybe_warn_about_dependency(original_u, original_other->id, d); |
87f0e418 | 3046 | return 0; |
d1fab3fe | 3047 | } |
87f0e418 | 3048 | |
15ed3c3a LP |
3049 | /* Note that ordering a device unit after a unit is permitted since it allows to start its job |
3050 | * running timeout at a specific time. */ | |
3051 | if (FLAGS_SET(a, UNIT_ATOM_BEFORE) && other->type == UNIT_DEVICE) { | |
b862c257 | 3052 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); |
c80a9a33 LP |
3053 | return 0; |
3054 | } | |
3055 | ||
15ed3c3a | 3056 | if (FLAGS_SET(a, UNIT_ATOM_ON_FAILURE) && !UNIT_VTABLE(u)->can_fail) { |
c80a9a33 LP |
3057 | log_unit_warning(u, "Requested dependency OnFailure=%s ignored (%s units cannot fail).", other->id, unit_type_to_string(u->type)); |
3058 | return 0; | |
3059 | } | |
3060 | ||
15ed3c3a | 3061 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERS) && !UNIT_VTABLE(u)->can_trigger) |
c80a9a33 LP |
3062 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3063 | "Requested dependency Triggers=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(u->type)); | |
15ed3c3a | 3064 | if (FLAGS_SET(a, UNIT_ATOM_TRIGGERED_BY) && !UNIT_VTABLE(other)->can_trigger) |
c80a9a33 LP |
3065 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), |
3066 | "Requested dependency TriggeredBy=%s refused (%s units cannot trigger other units).", other->id, unit_type_to_string(other->type)); | |
3067 | ||
d219a2b0 LP |
3068 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && other->type != UNIT_SLICE) |
3069 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3070 | "Requested dependency Slice=%s refused (%s is not a slice unit).", other->id, other->id); | |
3071 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && u->type != UNIT_SLICE) | |
3072 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3073 | "Requested dependency SliceOf=%s refused (%s is not a slice unit).", other->id, u->id); | |
3074 | ||
3075 | if (FLAGS_SET(a, UNIT_ATOM_IN_SLICE) && !UNIT_HAS_CGROUP_CONTEXT(u)) | |
3076 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3077 | "Requested dependency Slice=%s refused (%s is not a cgroup unit).", other->id, u->id); | |
3078 | ||
3079 | if (FLAGS_SET(a, UNIT_ATOM_SLICE_OF) && !UNIT_HAS_CGROUP_CONTEXT(other)) | |
3080 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EINVAL), | |
3081 | "Requested dependency SliceOf=%s refused (%s is not a cgroup unit).", other->id, other->id); | |
3082 | ||
15ed3c3a | 3083 | r = unit_add_dependency_hashmap(&u->dependencies, d, other, mask, 0); |
613b411c | 3084 | if (r < 0) |
87f0e418 | 3085 | return r; |
15ed3c3a | 3086 | noop = !r; |
87f0e418 | 3087 | |
eef85c4a | 3088 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
15ed3c3a | 3089 | r = unit_add_dependency_hashmap(&other->dependencies, inverse_table[d], u, 0, mask); |
613b411c LP |
3090 | if (r < 0) |
3091 | return r; | |
15ed3c3a | 3092 | if (r) |
5177cb0a | 3093 | noop = false; |
613b411c LP |
3094 | } |
3095 | ||
3096 | if (add_reference) { | |
15ed3c3a | 3097 | r = unit_add_dependency_hashmap(&u->dependencies, UNIT_REFERENCES, other, mask, 0); |
613b411c | 3098 | if (r < 0) |
5de9682c | 3099 | return r; |
15ed3c3a | 3100 | if (r) |
5177cb0a | 3101 | noop = false; |
5de9682c | 3102 | |
15ed3c3a | 3103 | r = unit_add_dependency_hashmap(&other->dependencies, UNIT_REFERENCED_BY, u, 0, mask); |
613b411c | 3104 | if (r < 0) |
701cc384 | 3105 | return r; |
15ed3c3a | 3106 | if (r) |
5177cb0a | 3107 | noop = false; |
613b411c | 3108 | } |
87f0e418 | 3109 | |
5177cb0a RM |
3110 | if (!noop) |
3111 | unit_add_to_dbus_queue(u); | |
15ed3c3a | 3112 | |
87f0e418 LP |
3113 | return 0; |
3114 | } | |
0301abf4 | 3115 | |
eef85c4a | 3116 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask) { |
2c966c03 LP |
3117 | int r; |
3118 | ||
3119 | assert(u); | |
3120 | ||
eef85c4a | 3121 | r = unit_add_dependency(u, d, other, add_reference, mask); |
3f3cc397 | 3122 | if (r < 0) |
2c966c03 LP |
3123 | return r; |
3124 | ||
eef85c4a | 3125 | return unit_add_dependency(u, e, other, add_reference, mask); |
2c966c03 LP |
3126 | } |
3127 | ||
23e8c796 | 3128 | static int resolve_template(Unit *u, const char *name, char **buf, const char **ret) { |
7410616c | 3129 | int r; |
9e2f7c11 LP |
3130 | |
3131 | assert(u); | |
23e8c796 | 3132 | assert(name); |
7410616c LP |
3133 | assert(buf); |
3134 | assert(ret); | |
9e2f7c11 | 3135 | |
7410616c LP |
3136 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
3137 | *buf = NULL; | |
3138 | *ret = name; | |
3139 | return 0; | |
9e2f7c11 LP |
3140 | } |
3141 | ||
ac155bb8 | 3142 | if (u->instance) |
7410616c | 3143 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 3144 | else { |
ae018d9b | 3145 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 3146 | |
7410616c LP |
3147 | r = unit_name_to_prefix(u->id, &i); |
3148 | if (r < 0) | |
3149 | return r; | |
9e2f7c11 | 3150 | |
7410616c | 3151 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 3152 | } |
7410616c LP |
3153 | if (r < 0) |
3154 | return r; | |
9e2f7c11 | 3155 | |
7410616c LP |
3156 | *ret = *buf; |
3157 | return 0; | |
9e2f7c11 LP |
3158 | } |
3159 | ||
35d8c19a | 3160 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3161 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
3162 | Unit *other; |
3163 | int r; | |
3164 | ||
9e2f7c11 | 3165 | assert(u); |
35d8c19a | 3166 | assert(name); |
09b6b09f | 3167 | |
23e8c796 | 3168 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3169 | if (r < 0) |
3170 | return r; | |
09b6b09f | 3171 | |
35d8c19a | 3172 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
8afbb8e1 LP |
3173 | if (r < 0) |
3174 | return r; | |
9e2f7c11 | 3175 | |
eef85c4a | 3176 | return unit_add_dependency(u, d, other, add_reference, mask); |
09b6b09f LP |
3177 | } |
3178 | ||
5a724170 | 3179 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, bool add_reference, UnitDependencyMask mask) { |
7410616c | 3180 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
3181 | Unit *other; |
3182 | int r; | |
2c966c03 LP |
3183 | |
3184 | assert(u); | |
5a724170 | 3185 | assert(name); |
2c966c03 | 3186 | |
23e8c796 | 3187 | r = resolve_template(u, name, &buf, &name); |
7410616c LP |
3188 | if (r < 0) |
3189 | return r; | |
2c966c03 | 3190 | |
5a724170 | 3191 | r = manager_load_unit(u->manager, name, NULL, NULL, &other); |
3f3cc397 | 3192 | if (r < 0) |
68eda4bd | 3193 | return r; |
2c966c03 | 3194 | |
eef85c4a | 3195 | return unit_add_two_dependencies(u, d, e, other, add_reference, mask); |
2c966c03 LP |
3196 | } |
3197 | ||
0301abf4 | 3198 | int set_unit_path(const char *p) { |
0301abf4 | 3199 | /* This is mostly for debug purposes */ |
cbe46ead | 3200 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 3201 | return -errno; |
0301abf4 LP |
3202 | |
3203 | return 0; | |
3204 | } | |
88066b3a | 3205 | |
ea430986 | 3206 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
3207 | assert(u); |
3208 | ||
ac155bb8 | 3209 | if (!u->id) |
04ade7d2 LP |
3210 | return NULL; |
3211 | ||
48899192 | 3212 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
3213 | } |
3214 | ||
4b58153d LP |
3215 | char *unit_dbus_path_invocation_id(Unit *u) { |
3216 | assert(u); | |
3217 | ||
3218 | if (sd_id128_is_null(u->invocation_id)) | |
3219 | return NULL; | |
3220 | ||
3221 | return unit_dbus_path_from_name(u->invocation_id_string); | |
3222 | } | |
3223 | ||
2d3b784d | 3224 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { |
db868d45 ZJS |
3225 | int r; |
3226 | ||
3227 | assert(u); | |
3228 | ||
3229 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
3230 | ||
3231 | if (sd_id128_equal(u->invocation_id, id)) | |
3232 | return 0; | |
3233 | ||
3234 | if (!sd_id128_is_null(u->invocation_id)) | |
3235 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3236 | ||
3237 | if (sd_id128_is_null(id)) { | |
3238 | r = 0; | |
3239 | goto reset; | |
3240 | } | |
3241 | ||
3242 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
3243 | if (r < 0) | |
3244 | goto reset; | |
3245 | ||
3246 | u->invocation_id = id; | |
3247 | sd_id128_to_string(id, u->invocation_id_string); | |
3248 | ||
3249 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
3250 | if (r < 0) | |
3251 | goto reset; | |
3252 | ||
3253 | return 0; | |
3254 | ||
3255 | reset: | |
3256 | u->invocation_id = SD_ID128_NULL; | |
3257 | u->invocation_id_string[0] = 0; | |
3258 | return r; | |
3259 | } | |
3260 | ||
d219a2b0 LP |
3261 | int unit_set_slice(Unit *u, Unit *slice, UnitDependencyMask mask) { |
3262 | int r; | |
3263 | ||
d79200e2 LP |
3264 | assert(u); |
3265 | assert(slice); | |
3266 | ||
d219a2b0 LP |
3267 | /* Sets the unit slice if it has not been set before. Is extra careful, to only allow this for units |
3268 | * that actually have a cgroup context. Also, we don't allow to set this for slices (since the parent | |
3269 | * slice is derived from the name). Make sure the unit we set is actually a slice. */ | |
d79200e2 LP |
3270 | |
3271 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
3272 | return -EOPNOTSUPP; | |
3273 | ||
3274 | if (u->type == UNIT_SLICE) | |
3275 | return -EINVAL; | |
3276 | ||
102ef982 LP |
3277 | if (unit_active_state(u) != UNIT_INACTIVE) |
3278 | return -EBUSY; | |
3279 | ||
d79200e2 LP |
3280 | if (slice->type != UNIT_SLICE) |
3281 | return -EINVAL; | |
3282 | ||
efdb0237 LP |
3283 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
3284 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
3285 | return -EPERM; | |
3286 | ||
12f64221 | 3287 | if (UNIT_GET_SLICE(u) == slice) |
d79200e2 LP |
3288 | return 0; |
3289 | ||
99e66921 | 3290 | /* Disallow slice changes if @u is already bound to cgroups */ |
12f64221 | 3291 | if (UNIT_GET_SLICE(u) && u->cgroup_realized) |
d79200e2 LP |
3292 | return -EBUSY; |
3293 | ||
d219a2b0 LP |
3294 | r = unit_add_dependency(u, UNIT_IN_SLICE, slice, true, mask); |
3295 | if (r < 0) | |
3296 | return r; | |
3297 | ||
d79200e2 LP |
3298 | return 1; |
3299 | } | |
3300 | ||
3301 | int unit_set_default_slice(Unit *u) { | |
a8833944 | 3302 | const char *slice_name; |
a016b922 LP |
3303 | Unit *slice; |
3304 | int r; | |
3305 | ||
3306 | assert(u); | |
3307 | ||
12f64221 | 3308 | if (UNIT_GET_SLICE(u)) |
a016b922 LP |
3309 | return 0; |
3310 | ||
a8833944 LP |
3311 | if (u->instance) { |
3312 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 3313 | |
a8833944 LP |
3314 | /* Implicitly place all instantiated units in their |
3315 | * own per-template slice */ | |
3316 | ||
7410616c LP |
3317 | r = unit_name_to_prefix(u->id, &prefix); |
3318 | if (r < 0) | |
3319 | return r; | |
a8833944 LP |
3320 | |
3321 | /* The prefix is already escaped, but it might include | |
3322 | * "-" which has a special meaning for slice units, | |
3323 | * hence escape it here extra. */ | |
7410616c | 3324 | escaped = unit_name_escape(prefix); |
a8833944 LP |
3325 | if (!escaped) |
3326 | return -ENOMEM; | |
3327 | ||
463d0d15 | 3328 | if (MANAGER_IS_SYSTEM(u->manager)) |
00e7b3c8 | 3329 | slice_name = strjoina("system-", escaped, ".slice"); |
a8833944 | 3330 | else |
7f3b86a4 | 3331 | slice_name = strjoina("app-", escaped, ".slice"); |
5ee24fa0 ZJS |
3332 | |
3333 | } else if (unit_is_extrinsic(u)) | |
3334 | /* Keep all extrinsic units (e.g. perpetual units and swap and mount units in user mode) in | |
3335 | * the root slice. They don't really belong in one of the subslices. */ | |
3336 | slice_name = SPECIAL_ROOT_SLICE; | |
3337 | ||
3338 | else if (MANAGER_IS_SYSTEM(u->manager)) | |
3339 | slice_name = SPECIAL_SYSTEM_SLICE; | |
3340 | else | |
3341 | slice_name = SPECIAL_APP_SLICE; | |
a8833944 LP |
3342 | |
3343 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
3344 | if (r < 0) |
3345 | return r; | |
3346 | ||
d219a2b0 | 3347 | return unit_set_slice(u, slice, UNIT_DEPENDENCY_FILE); |
a016b922 LP |
3348 | } |
3349 | ||
9444b1f2 | 3350 | const char *unit_slice_name(Unit *u) { |
12f64221 | 3351 | Unit *slice; |
9444b1f2 LP |
3352 | assert(u); |
3353 | ||
12f64221 LP |
3354 | slice = UNIT_GET_SLICE(u); |
3355 | if (!slice) | |
9444b1f2 LP |
3356 | return NULL; |
3357 | ||
12f64221 | 3358 | return slice->id; |
9444b1f2 LP |
3359 | } |
3360 | ||
f6ff8c29 | 3361 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 3362 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
3363 | int r; |
3364 | ||
3365 | assert(u); | |
3366 | assert(type); | |
3367 | assert(_found); | |
3368 | ||
7410616c LP |
3369 | r = unit_name_change_suffix(u->id, type, &t); |
3370 | if (r < 0) | |
3371 | return r; | |
3372 | if (unit_has_name(u, t)) | |
3373 | return -EINVAL; | |
f6ff8c29 | 3374 | |
ac155bb8 | 3375 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 3376 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
3377 | return r; |
3378 | } | |
3379 | ||
bbc29086 | 3380 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
fc67a943 | 3381 | const char *new_owner; |
bbc29086 DM |
3382 | Unit *u = userdata; |
3383 | int r; | |
3384 | ||
3385 | assert(message); | |
3386 | assert(u); | |
3387 | ||
fc67a943 | 3388 | r = sd_bus_message_read(message, "sss", NULL, NULL, &new_owner); |
bbc29086 DM |
3389 | if (r < 0) { |
3390 | bus_log_parse_error(r); | |
3391 | return 0; | |
3392 | } | |
3393 | ||
3394 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3395 | UNIT_VTABLE(u)->bus_name_owner_change(u, empty_to_null(new_owner)); |
a5a8776a MJ |
3396 | |
3397 | return 0; | |
3398 | } | |
3399 | ||
3400 | static int get_name_owner_handler(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
3401 | const sd_bus_error *e; | |
3402 | const char *new_owner; | |
3403 | Unit *u = userdata; | |
3404 | int r; | |
3405 | ||
3406 | assert(message); | |
3407 | assert(u); | |
3408 | ||
3409 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); | |
3410 | ||
a5a8776a | 3411 | e = sd_bus_message_get_error(message); |
a5a8776a | 3412 | if (e) { |
a54654ba LP |
3413 | if (!sd_bus_error_has_name(e, "org.freedesktop.DBus.Error.NameHasNoOwner")) |
3414 | log_unit_error(u, "Unexpected error response from GetNameOwner(): %s", e->message); | |
a5a8776a | 3415 | |
fc67a943 LP |
3416 | new_owner = NULL; |
3417 | } else { | |
3418 | r = sd_bus_message_read(message, "s", &new_owner); | |
3419 | if (r < 0) | |
3420 | return bus_log_parse_error(r); | |
a5a8776a | 3421 | |
fc67a943 LP |
3422 | assert(!isempty(new_owner)); |
3423 | } | |
a5a8776a MJ |
3424 | |
3425 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
fc67a943 | 3426 | UNIT_VTABLE(u)->bus_name_owner_change(u, new_owner); |
bbc29086 DM |
3427 | |
3428 | return 0; | |
3429 | } | |
3430 | ||
9806e87d LP |
3431 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
3432 | const char *match; | |
a5b07847 | 3433 | int r; |
bbc29086 | 3434 | |
9806e87d LP |
3435 | assert(u); |
3436 | assert(bus); | |
3437 | assert(name); | |
bbc29086 | 3438 | |
a5b07847 | 3439 | if (u->match_bus_slot || u->get_name_owner_slot) |
bbc29086 DM |
3440 | return -EBUSY; |
3441 | ||
9806e87d | 3442 | match = strjoina("type='signal'," |
81d62103 ZJS |
3443 | "sender='org.freedesktop.DBus'," |
3444 | "path='/org/freedesktop/DBus'," | |
3445 | "interface='org.freedesktop.DBus'," | |
3446 | "member='NameOwnerChanged'," | |
3447 | "arg0='", name, "'"); | |
bbc29086 | 3448 | |
a5b07847 | 3449 | r = sd_bus_add_match_async(bus, &u->match_bus_slot, match, signal_name_owner_changed, NULL, u); |
a5a8776a MJ |
3450 | if (r < 0) |
3451 | return r; | |
3452 | ||
a5b07847 LP |
3453 | r = sd_bus_call_method_async( |
3454 | bus, | |
3455 | &u->get_name_owner_slot, | |
3456 | "org.freedesktop.DBus", | |
3457 | "/org/freedesktop/DBus", | |
3458 | "org.freedesktop.DBus", | |
3459 | "GetNameOwner", | |
3460 | get_name_owner_handler, | |
3461 | u, | |
3462 | "s", name); | |
3463 | if (r < 0) { | |
3464 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
3465 | return r; | |
3466 | } | |
3467 | ||
3468 | log_unit_debug(u, "Watching D-Bus name '%s'.", name); | |
3469 | return 0; | |
bbc29086 DM |
3470 | } |
3471 | ||
05e343b7 | 3472 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
3473 | int r; |
3474 | ||
05e343b7 LP |
3475 | assert(u); |
3476 | assert(name); | |
3477 | ||
3478 | /* Watch a specific name on the bus. We only support one unit | |
3479 | * watching each name for now. */ | |
3480 | ||
bbc29086 DM |
3481 | if (u->manager->api_bus) { |
3482 | /* If the bus is already available, install the match directly. | |
3483 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 3484 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 3485 | if (r < 0) |
8ea823b6 | 3486 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
3487 | } |
3488 | ||
3489 | r = hashmap_put(u->manager->watch_bus, name, u); | |
3490 | if (r < 0) { | |
3491 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
a5b07847 | 3492 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
bbc29086 DM |
3493 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); |
3494 | } | |
3495 | ||
3496 | return 0; | |
05e343b7 LP |
3497 | } |
3498 | ||
3499 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
3500 | assert(u); | |
3501 | assert(name); | |
3502 | ||
8367fea5 | 3503 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 3504 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
a5a8776a | 3505 | u->get_name_owner_slot = sd_bus_slot_unref(u->get_name_owner_slot); |
05e343b7 LP |
3506 | } |
3507 | ||
d336ba9f | 3508 | int unit_add_node_dependency(Unit *u, const char *what, UnitDependency dep, UnitDependencyMask mask) { |
68eda4bd | 3509 | _cleanup_free_ char *e = NULL; |
44b0d1fd | 3510 | Unit *device; |
6e2ef85b LP |
3511 | int r; |
3512 | ||
3513 | assert(u); | |
3514 | ||
6e2ef85b | 3515 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3516 | if (isempty(what)) |
3517 | return 0; | |
6e2ef85b | 3518 | |
8407a5d0 | 3519 | if (!is_device_path(what)) |
6e2ef85b LP |
3520 | return 0; |
3521 | ||
44b0d1fd | 3522 | /* When device units aren't supported (such as in a container), don't create dependencies on them. */ |
1c2e9646 | 3523 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3524 | return 0; |
3525 | ||
7410616c LP |
3526 | r = unit_name_from_path(what, ".device", &e); |
3527 | if (r < 0) | |
3528 | return r; | |
6e2ef85b | 3529 | |
ac155bb8 | 3530 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3531 | if (r < 0) |
3532 | return r; | |
3533 | ||
ebc8968b FB |
3534 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3535 | dep = UNIT_BINDS_TO; | |
3536 | ||
d336ba9f FB |
3537 | return unit_add_two_dependencies(u, UNIT_AFTER, |
3538 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, | |
3539 | device, true, mask); | |
6e2ef85b | 3540 | } |
a16e1123 | 3541 | |
44b0d1fd LP |
3542 | int unit_add_blockdev_dependency(Unit *u, const char *what, UnitDependencyMask mask) { |
3543 | _cleanup_free_ char *escaped = NULL, *target = NULL; | |
3544 | int r; | |
3545 | ||
3546 | assert(u); | |
3547 | ||
3548 | if (isempty(what)) | |
3549 | return 0; | |
3550 | ||
3551 | if (!path_startswith(what, "/dev/")) | |
3552 | return 0; | |
3553 | ||
3554 | /* If we don't support devices, then also don't bother with blockdev@.target */ | |
3555 | if (!unit_type_supported(UNIT_DEVICE)) | |
3556 | return 0; | |
3557 | ||
3558 | r = unit_name_path_escape(what, &escaped); | |
3559 | if (r < 0) | |
3560 | return r; | |
3561 | ||
3562 | r = unit_name_build("blockdev", escaped, ".target", &target); | |
3563 | if (r < 0) | |
3564 | return r; | |
3565 | ||
3566 | return unit_add_dependency_by_name(u, UNIT_AFTER, target, true, mask); | |
3567 | } | |
3568 | ||
be847e82 | 3569 | int unit_coldplug(Unit *u) { |
05a98afd LP |
3570 | int r = 0, q; |
3571 | char **i; | |
b49e14d5 | 3572 | Job *uj; |
cca098b0 LP |
3573 | |
3574 | assert(u); | |
3575 | ||
f0831ed2 | 3576 | /* Make sure we don't enter a loop, when coldplugging recursively. */ |
f78f265f LP |
3577 | if (u->coldplugged) |
3578 | return 0; | |
3579 | ||
3580 | u->coldplugged = true; | |
3581 | ||
05a98afd LP |
3582 | STRV_FOREACH(i, u->deserialized_refs) { |
3583 | q = bus_unit_track_add_name(u, *i); | |
3584 | if (q < 0 && r >= 0) | |
3585 | r = q; | |
3586 | } | |
3587 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 3588 | |
05a98afd LP |
3589 | if (UNIT_VTABLE(u)->coldplug) { |
3590 | q = UNIT_VTABLE(u)->coldplug(u); | |
3591 | if (q < 0 && r >= 0) | |
3592 | r = q; | |
3593 | } | |
5a6158b6 | 3594 | |
b49e14d5 | 3595 | uj = u->job ?: u->nop_job; |
3596 | if (uj) { | |
3597 | q = job_coldplug(uj); | |
05a98afd LP |
3598 | if (q < 0 && r >= 0) |
3599 | r = q; | |
3600 | } | |
cca098b0 | 3601 | |
05a98afd | 3602 | return r; |
cca098b0 LP |
3603 | } |
3604 | ||
f0831ed2 LP |
3605 | void unit_catchup(Unit *u) { |
3606 | assert(u); | |
3607 | ||
3608 | if (UNIT_VTABLE(u)->catchup) | |
3609 | UNIT_VTABLE(u)->catchup(u); | |
3610 | } | |
3611 | ||
ba25d39e | 3612 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3613 | struct stat st; |
3614 | ||
3615 | if (!path) | |
3616 | return false; | |
3617 | ||
77969722 LP |
3618 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3619 | * are never out-of-date. */ | |
3620 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3621 | return false; | |
3622 | ||
21b95806 ZJS |
3623 | if (stat(path, &st) < 0) |
3624 | /* What, cannot access this anymore? */ | |
3625 | return true; | |
3626 | ||
ba25d39e ZJS |
3627 | if (path_masked) |
3628 | /* For masked files check if they are still so */ | |
3629 | return !null_or_empty(&st); | |
3630 | else | |
3a8db9fe | 3631 | /* For non-empty files check the mtime */ |
87ec20ef | 3632 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3633 | |
3634 | return false; | |
3635 | } | |
3636 | ||
45fb0699 | 3637 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
3638 | _cleanup_strv_free_ char **t = NULL; |
3639 | char **path; | |
1b64d026 | 3640 | |
45fb0699 LP |
3641 | assert(u); |
3642 | ||
ba25d39e ZJS |
3643 | /* For unit files, we allow masking… */ |
3644 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3645 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3646 | return true; |
5f4b19f4 | 3647 | |
ba25d39e ZJS |
3648 | /* Source paths should not be masked… */ |
3649 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3650 | return true; |
ae7a7182 | 3651 | |
19a44dfe LR |
3652 | if (u->load_state == UNIT_LOADED) |
3653 | (void) unit_find_dropin_paths(u, &t); | |
ab932a62 LP |
3654 | if (!strv_equal(u->dropin_paths, t)) |
3655 | return true; | |
6d10d308 | 3656 | |
ba25d39e | 3657 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3658 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3659 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3660 | return true; |
21b95806 | 3661 | |
ab932a62 | 3662 | return false; |
45fb0699 LP |
3663 | } |
3664 | ||
fdf20a31 | 3665 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3666 | assert(u); |
3667 | ||
fdf20a31 MM |
3668 | if (UNIT_VTABLE(u)->reset_failed) |
3669 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 | 3670 | |
7bf081a1 | 3671 | ratelimit_reset(&u->start_ratelimit); |
6bf0f408 | 3672 | u->start_limit_hit = false; |
5632e374 LP |
3673 | } |
3674 | ||
a7f241db LP |
3675 | Unit *unit_following(Unit *u) { |
3676 | assert(u); | |
3677 | ||
3678 | if (UNIT_VTABLE(u)->following) | |
3679 | return UNIT_VTABLE(u)->following(u); | |
3680 | ||
3681 | return NULL; | |
3682 | } | |
3683 | ||
31afa0a4 | 3684 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3685 | assert(u); |
3686 | ||
31afa0a4 LP |
3687 | /* This call does check the current state of the unit. It's |
3688 | * hence useful to be called from state change calls of the | |
3689 | * unit itself, where the state isn't updated yet. This is | |
3690 | * different from unit_inactive_or_pending() which checks both | |
3691 | * the current state and for a queued job. */ | |
18ffdfda | 3692 | |
28a2dfe8 | 3693 | return unit_has_job_type(u, JOB_STOP); |
31afa0a4 LP |
3694 | } |
3695 | ||
3696 | bool unit_inactive_or_pending(Unit *u) { | |
3697 | assert(u); | |
3698 | ||
3699 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3700 | |
d956ac29 LP |
3701 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3702 | return true; | |
3703 | ||
31afa0a4 | 3704 | if (unit_stop_pending(u)) |
18ffdfda LP |
3705 | return true; |
3706 | ||
3707 | return false; | |
3708 | } | |
3709 | ||
31afa0a4 | 3710 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3711 | assert(u); |
3712 | ||
f60c2665 | 3713 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3714 | |
3715 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3716 | return true; | |
3717 | ||
ac155bb8 | 3718 | if (u->job && |
3742095b | 3719 | IN_SET(u->job->type, JOB_START, JOB_RELOAD_OR_START, JOB_RESTART)) |
f976f3f6 LP |
3720 | return true; |
3721 | ||
3722 | return false; | |
3723 | } | |
3724 | ||
52a12341 YW |
3725 | bool unit_will_restart_default(Unit *u) { |
3726 | assert(u); | |
3727 | ||
28a2dfe8 | 3728 | return unit_has_job_type(u, JOB_START); |
52a12341 YW |
3729 | } |
3730 | ||
deb4e708 MK |
3731 | bool unit_will_restart(Unit *u) { |
3732 | assert(u); | |
3733 | ||
3734 | if (!UNIT_VTABLE(u)->will_restart) | |
3735 | return false; | |
3736 | ||
3737 | return UNIT_VTABLE(u)->will_restart(u); | |
3738 | } | |
3739 | ||
718db961 | 3740 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3741 | assert(u); |
3742 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 3743 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 3744 | |
8a0867d6 | 3745 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3746 | return -EOPNOTSUPP; |
8a0867d6 | 3747 | |
c74f17d9 | 3748 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3749 | } |
3750 | ||
82659fd7 | 3751 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
af4fa99d | 3752 | _cleanup_set_free_ Set *pid_set = NULL; |
82659fd7 LP |
3753 | int r; |
3754 | ||
d5099efc | 3755 | pid_set = set_new(NULL); |
82659fd7 LP |
3756 | if (!pid_set) |
3757 | return NULL; | |
3758 | ||
3759 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3760 | if (main_pid > 0) { | |
fea72cc0 | 3761 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 | 3762 | if (r < 0) |
95f14a3e | 3763 | return NULL; |
82659fd7 LP |
3764 | } |
3765 | ||
3766 | if (control_pid > 0) { | |
fea72cc0 | 3767 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 | 3768 | if (r < 0) |
95f14a3e | 3769 | return NULL; |
82659fd7 LP |
3770 | } |
3771 | ||
95f14a3e | 3772 | return TAKE_PTR(pid_set); |
82659fd7 LP |
3773 | } |
3774 | ||
d9911002 LP |
3775 | static int kill_common_log(pid_t pid, int signo, void *userdata) { |
3776 | _cleanup_free_ char *comm = NULL; | |
3777 | Unit *u = userdata; | |
3778 | ||
3779 | assert(u); | |
3780 | ||
3781 | (void) get_process_comm(pid, &comm); | |
3782 | log_unit_info(u, "Sending signal SIG%s to process " PID_FMT " (%s) on client request.", | |
3783 | signal_to_string(signo), pid, strna(comm)); | |
3784 | ||
3785 | return 1; | |
3786 | } | |
3787 | ||
d91c34f2 LP |
3788 | int unit_kill_common( |
3789 | Unit *u, | |
3790 | KillWho who, | |
3791 | int signo, | |
3792 | pid_t main_pid, | |
3793 | pid_t control_pid, | |
718db961 | 3794 | sd_bus_error *error) { |
d91c34f2 | 3795 | |
814cc562 | 3796 | int r = 0; |
ac5e3a50 | 3797 | bool killed = false; |
814cc562 | 3798 | |
8aff7ac4 LP |
3799 | /* This is the common implementation for explicit user-requested killing of unit processes, shared by |
3800 | * various unit types. Do not confuse with unit_kill_context(), which is what we use when we want to | |
3801 | * stop a service ourselves. */ | |
3802 | ||
ac5e3a50 | 3803 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3804 | if (main_pid < 0) |
7358dc02 | 3805 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
8aff7ac4 | 3806 | if (main_pid == 0) |
7358dc02 | 3807 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3808 | } |
3809 | ||
ac5e3a50 | 3810 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3811 | if (control_pid < 0) |
7358dc02 | 3812 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
8aff7ac4 | 3813 | if (control_pid == 0) |
7358dc02 | 3814 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3815 | } |
3816 | ||
ac5e3a50 JS |
3817 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3818 | if (control_pid > 0) { | |
d9911002 LP |
3819 | _cleanup_free_ char *comm = NULL; |
3820 | (void) get_process_comm(control_pid, &comm); | |
3821 | ||
3822 | if (kill(control_pid, signo) < 0) { | |
3823 | /* Report this failure both to the logs and to the client */ | |
3824 | sd_bus_error_set_errnof( | |
3825 | error, errno, | |
3826 | "Failed to send signal SIG%s to control process " PID_FMT " (%s): %m", | |
3827 | signal_to_string(signo), control_pid, strna(comm)); | |
3828 | r = log_unit_warning_errno( | |
3829 | u, errno, | |
3830 | "Failed to send signal SIG%s to control process " PID_FMT " (%s) on client request: %m", | |
3831 | signal_to_string(signo), control_pid, strna(comm)); | |
3832 | } else { | |
3833 | log_unit_info(u, "Sent signal SIG%s to control process " PID_FMT " (%s) on client request.", | |
3834 | signal_to_string(signo), control_pid, strna(comm)); | |
ac5e3a50 | 3835 | killed = true; |
d9911002 | 3836 | } |
ac5e3a50 | 3837 | } |
814cc562 | 3838 | |
ac5e3a50 JS |
3839 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3840 | if (main_pid > 0) { | |
d9911002 LP |
3841 | _cleanup_free_ char *comm = NULL; |
3842 | (void) get_process_comm(main_pid, &comm); | |
3843 | ||
3844 | if (kill(main_pid, signo) < 0) { | |
3845 | if (r == 0) | |
3846 | sd_bus_error_set_errnof( | |
3847 | error, errno, | |
3848 | "Failed to send signal SIG%s to main process " PID_FMT " (%s): %m", | |
3849 | signal_to_string(signo), main_pid, strna(comm)); | |
3850 | ||
3851 | r = log_unit_warning_errno( | |
3852 | u, errno, | |
3853 | "Failed to send signal SIG%s to main process " PID_FMT " (%s) on client request: %m", | |
3854 | signal_to_string(signo), main_pid, strna(comm)); | |
3855 | } else { | |
3856 | log_unit_info(u, "Sent signal SIG%s to main process " PID_FMT " (%s) on client request.", | |
3857 | signal_to_string(signo), main_pid, strna(comm)); | |
ac5e3a50 | 3858 | killed = true; |
d9911002 | 3859 | } |
ac5e3a50 | 3860 | } |
814cc562 | 3861 | |
ac5e3a50 | 3862 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3863 | _cleanup_set_free_ Set *pid_set = NULL; |
3864 | int q; | |
3865 | ||
82659fd7 LP |
3866 | /* Exclude the main/control pids from being killed via the cgroup */ |
3867 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 | 3868 | if (!pid_set) |
d9911002 LP |
3869 | return log_oom(); |
3870 | ||
3871 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, kill_common_log, u); | |
3872 | if (q < 0) { | |
3873 | if (!IN_SET(q, -ESRCH, -ENOENT)) { | |
3874 | if (r == 0) | |
3875 | sd_bus_error_set_errnof( | |
3876 | error, q, | |
3877 | "Failed to send signal SIG%s to auxiliary processes: %m", | |
3878 | signal_to_string(signo)); | |
3879 | ||
3880 | r = log_unit_warning_errno( | |
3881 | u, q, | |
3882 | "Failed to send signal SIG%s to auxiliary processes on client request: %m", | |
3883 | signal_to_string(signo)); | |
3884 | } | |
3885 | } else | |
ac5e3a50 | 3886 | killed = true; |
814cc562 MS |
3887 | } |
3888 | ||
2ae0508e LP |
3889 | /* If the "fail" versions of the operation are requested, then complain if the set of processes we killed is empty */ |
3890 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL, KILL_MAIN_FAIL)) | |
3891 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No matching processes to kill"); | |
ac5e3a50 | 3892 | |
814cc562 MS |
3893 | return r; |
3894 | } | |
3895 | ||
6210e7fc LP |
3896 | int unit_following_set(Unit *u, Set **s) { |
3897 | assert(u); | |
3898 | assert(s); | |
3899 | ||
3900 | if (UNIT_VTABLE(u)->following_set) | |
3901 | return UNIT_VTABLE(u)->following_set(u, s); | |
3902 | ||
3903 | *s = NULL; | |
3904 | return 0; | |
3905 | } | |
3906 | ||
a4375746 | 3907 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
3908 | int r; |
3909 | ||
a4375746 LP |
3910 | assert(u); |
3911 | ||
0ec0deaa LP |
3912 | if (u->unit_file_state < 0 && u->fragment_path) { |
3913 | r = unit_file_get_state( | |
463d0d15 | 3914 | u->manager->unit_file_scope, |
0ec0deaa | 3915 | NULL, |
9ea3a0e7 | 3916 | u->id, |
0ec0deaa LP |
3917 | &u->unit_file_state); |
3918 | if (r < 0) | |
3919 | u->unit_file_state = UNIT_FILE_BAD; | |
3920 | } | |
a4375746 | 3921 | |
ac155bb8 | 3922 | return u->unit_file_state; |
a4375746 LP |
3923 | } |
3924 | ||
d2dc52db LP |
3925 | int unit_get_unit_file_preset(Unit *u) { |
3926 | assert(u); | |
3927 | ||
3928 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3929 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 3930 | u->manager->unit_file_scope, |
0ec0deaa | 3931 | NULL, |
8f7b2566 ZJS |
3932 | basename(u->fragment_path), |
3933 | NULL); | |
d2dc52db LP |
3934 | |
3935 | return u->unit_file_preset; | |
3936 | } | |
3937 | ||
7f7d01ed | 3938 | Unit* unit_ref_set(UnitRef *ref, Unit *source, Unit *target) { |
57020a3a | 3939 | assert(ref); |
7f7d01ed ZJS |
3940 | assert(source); |
3941 | assert(target); | |
57020a3a | 3942 | |
7f7d01ed | 3943 | if (ref->target) |
57020a3a LP |
3944 | unit_ref_unset(ref); |
3945 | ||
7f7d01ed ZJS |
3946 | ref->source = source; |
3947 | ref->target = target; | |
3948 | LIST_PREPEND(refs_by_target, target->refs_by_target, ref); | |
3949 | return target; | |
57020a3a LP |
3950 | } |
3951 | ||
3952 | void unit_ref_unset(UnitRef *ref) { | |
3953 | assert(ref); | |
3954 | ||
7f7d01ed | 3955 | if (!ref->target) |
57020a3a LP |
3956 | return; |
3957 | ||
b75102e5 LP |
3958 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
3959 | * be unreferenced now. */ | |
7f7d01ed | 3960 | unit_add_to_gc_queue(ref->target); |
b75102e5 | 3961 | |
7f7d01ed ZJS |
3962 | LIST_REMOVE(refs_by_target, ref->target->refs_by_target, ref); |
3963 | ref->source = ref->target = NULL; | |
57020a3a LP |
3964 | } |
3965 | ||
29206d46 LP |
3966 | static int user_from_unit_name(Unit *u, char **ret) { |
3967 | ||
3968 | static const uint8_t hash_key[] = { | |
3969 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
3970 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
3971 | }; | |
3972 | ||
3973 | _cleanup_free_ char *n = NULL; | |
3974 | int r; | |
3975 | ||
3976 | r = unit_name_to_prefix(u->id, &n); | |
3977 | if (r < 0) | |
3978 | return r; | |
3979 | ||
7a8867ab | 3980 | if (valid_user_group_name(n, 0)) { |
ae2a15bc | 3981 | *ret = TAKE_PTR(n); |
29206d46 LP |
3982 | return 0; |
3983 | } | |
3984 | ||
3985 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
3986 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
3987 | return -ENOMEM; | |
3988 | ||
3989 | return 0; | |
3990 | } | |
3991 | ||
598459ce LP |
3992 | int unit_patch_contexts(Unit *u) { |
3993 | CGroupContext *cc; | |
3994 | ExecContext *ec; | |
cba6e062 LP |
3995 | int r; |
3996 | ||
e06c73cc | 3997 | assert(u); |
e06c73cc | 3998 | |
598459ce LP |
3999 | /* Patch in the manager defaults into the exec and cgroup |
4000 | * contexts, _after_ the rest of the settings have been | |
4001 | * initialized */ | |
085afe36 | 4002 | |
598459ce LP |
4003 | ec = unit_get_exec_context(u); |
4004 | if (ec) { | |
4005 | /* This only copies in the ones that need memory */ | |
12375b95 | 4006 | for (unsigned i = 0; i < _RLIMIT_MAX; i++) |
598459ce LP |
4007 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { |
4008 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
4009 | if (!ec->rlimit[i]) | |
4010 | return -ENOMEM; | |
4011 | } | |
4012 | ||
463d0d15 | 4013 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
4014 | !ec->working_directory) { |
4015 | ||
4016 | r = get_home_dir(&ec->working_directory); | |
4017 | if (r < 0) | |
4018 | return r; | |
4c08c824 LP |
4019 | |
4020 | /* Allow user services to run, even if the | |
4021 | * home directory is missing */ | |
4022 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
4023 | } |
4024 | ||
598459ce | 4025 | if (ec->private_devices) |
2cd0a735 | 4026 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
4027 | |
4028 | if (ec->protect_kernel_modules) | |
4029 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 | 4030 | |
84703040 KK |
4031 | if (ec->protect_kernel_logs) |
4032 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYSLOG); | |
4033 | ||
fc64760d KK |
4034 | if (ec->protect_clock) |
4035 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_SYS_TIME) | (UINT64_C(1) << CAP_WAKE_ALARM)); | |
4036 | ||
29206d46 LP |
4037 | if (ec->dynamic_user) { |
4038 | if (!ec->user) { | |
4039 | r = user_from_unit_name(u, &ec->user); | |
4040 | if (r < 0) | |
4041 | return r; | |
4042 | } | |
4043 | ||
4044 | if (!ec->group) { | |
4045 | ec->group = strdup(ec->user); | |
4046 | if (!ec->group) | |
4047 | return -ENOMEM; | |
4048 | } | |
4049 | ||
bf65b7e0 LP |
4050 | /* If the dynamic user option is on, let's make sure that the unit can't leave its |
4051 | * UID/GID around in the file system or on IPC objects. Hence enforce a strict | |
4052 | * sandbox. */ | |
63bb64a0 | 4053 | |
29206d46 | 4054 | ec->private_tmp = true; |
00d9ef85 | 4055 | ec->remove_ipc = true; |
63bb64a0 LP |
4056 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
4057 | if (ec->protect_home == PROTECT_HOME_NO) | |
4058 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
bf65b7e0 LP |
4059 | |
4060 | /* Make sure this service can neither benefit from SUID/SGID binaries nor create | |
4061 | * them. */ | |
4062 | ec->no_new_privileges = true; | |
4063 | ec->restrict_suid_sgid = true; | |
29206d46 | 4064 | } |
cba6e062 LP |
4065 | } |
4066 | ||
598459ce | 4067 | cc = unit_get_cgroup_context(u); |
fe65e88b | 4068 | if (cc && ec) { |
f513e420 | 4069 | |
fe65e88b | 4070 | if (ec->private_devices && |
084870f9 ZJS |
4071 | cc->device_policy == CGROUP_DEVICE_POLICY_AUTO) |
4072 | cc->device_policy = CGROUP_DEVICE_POLICY_CLOSED; | |
fe65e88b | 4073 | |
b3d13314 | 4074 | if ((ec->root_image || !LIST_IS_EMPTY(ec->mount_images)) && |
084870f9 | 4075 | (cc->device_policy != CGROUP_DEVICE_POLICY_AUTO || cc->device_allow)) { |
0cffae95 | 4076 | const char *p; |
fe65e88b | 4077 | |
b3d13314 | 4078 | /* When RootImage= or MountImages= is specified, the following devices are touched. */ |
0cffae95 LB |
4079 | FOREACH_STRING(p, "/dev/loop-control", "/dev/mapper/control") { |
4080 | r = cgroup_add_device_allow(cc, p, "rw"); | |
4081 | if (r < 0) | |
4082 | return r; | |
4083 | } | |
4084 | FOREACH_STRING(p, "block-loop", "block-blkext", "block-device-mapper") { | |
4085 | r = cgroup_add_device_allow(cc, p, "rwm"); | |
4086 | if (r < 0) | |
4087 | return r; | |
4088 | } | |
867af728 | 4089 | |
0cffae95 LB |
4090 | /* Make sure "block-loop" can be resolved, i.e. make sure "loop" shows up in /proc/devices. |
4091 | * Same for mapper and verity. */ | |
4092 | FOREACH_STRING(p, "modprobe@loop.service", "modprobe@dm_mod.service", "modprobe@dm_verity.service") { | |
4093 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, p, true, UNIT_DEPENDENCY_FILE); | |
4094 | if (r < 0) | |
4095 | return r; | |
4096 | } | |
fe65e88b | 4097 | } |
fc64760d KK |
4098 | |
4099 | if (ec->protect_clock) { | |
4100 | r = cgroup_add_device_allow(cc, "char-rtc", "r"); | |
4101 | if (r < 0) | |
4102 | return r; | |
4103 | } | |
598459ce | 4104 | } |
f1660f96 | 4105 | |
cba6e062 | 4106 | return 0; |
e06c73cc LP |
4107 | } |
4108 | ||
c2503e35 | 4109 | ExecContext *unit_get_exec_context(const Unit *u) { |
3ef63c31 LP |
4110 | size_t offset; |
4111 | assert(u); | |
4112 | ||
598459ce LP |
4113 | if (u->type < 0) |
4114 | return NULL; | |
4115 | ||
3ef63c31 LP |
4116 | offset = UNIT_VTABLE(u)->exec_context_offset; |
4117 | if (offset <= 0) | |
4118 | return NULL; | |
4119 | ||
4120 | return (ExecContext*) ((uint8_t*) u + offset); | |
4121 | } | |
4122 | ||
718db961 LP |
4123 | KillContext *unit_get_kill_context(Unit *u) { |
4124 | size_t offset; | |
4125 | assert(u); | |
4126 | ||
598459ce LP |
4127 | if (u->type < 0) |
4128 | return NULL; | |
4129 | ||
718db961 LP |
4130 | offset = UNIT_VTABLE(u)->kill_context_offset; |
4131 | if (offset <= 0) | |
4132 | return NULL; | |
4133 | ||
4134 | return (KillContext*) ((uint8_t*) u + offset); | |
4135 | } | |
4136 | ||
4ad49000 LP |
4137 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
4138 | size_t offset; | |
4139 | ||
598459ce LP |
4140 | if (u->type < 0) |
4141 | return NULL; | |
4142 | ||
4ad49000 LP |
4143 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
4144 | if (offset <= 0) | |
4145 | return NULL; | |
4146 | ||
4147 | return (CGroupContext*) ((uint8_t*) u + offset); | |
4148 | } | |
4149 | ||
613b411c LP |
4150 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
4151 | size_t offset; | |
4152 | ||
598459ce LP |
4153 | if (u->type < 0) |
4154 | return NULL; | |
4155 | ||
613b411c LP |
4156 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
4157 | if (offset <= 0) | |
4158 | return NULL; | |
4159 | ||
4160 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
4161 | } | |
4162 | ||
2e59b241 | 4163 | static const char* unit_drop_in_dir(Unit *u, UnitWriteFlags flags) { |
3f5e8115 LP |
4164 | assert(u); |
4165 | ||
2e59b241 | 4166 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
4f4afc88 LP |
4167 | return NULL; |
4168 | ||
39591351 LP |
4169 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
4170 | return u->manager->lookup_paths.transient; | |
26d04f86 | 4171 | |
2e59b241 | 4172 | if (flags & UNIT_PERSISTENT) |
4f4afc88 | 4173 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 4174 | |
2e59b241 LP |
4175 | if (flags & UNIT_RUNTIME) |
4176 | return u->manager->lookup_paths.runtime_control; | |
4177 | ||
39591351 | 4178 | return NULL; |
71645aca LP |
4179 | } |
4180 | ||
2e59b241 LP |
4181 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf) { |
4182 | char *ret = NULL; | |
4183 | ||
4184 | if (!s) | |
4185 | return NULL; | |
4186 | ||
4187 | /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated | |
4188 | * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is | |
4189 | * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly | |
4190 | * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is | |
4191 | * not specified, then the return value always needs to be freed. Callers can use this to optimize memory | |
4192 | * allocations. */ | |
4193 | ||
4194 | if (flags & UNIT_ESCAPE_SPECIFIERS) { | |
4195 | ret = specifier_escape(s); | |
4196 | if (!ret) | |
4197 | return NULL; | |
4198 | ||
4199 | s = ret; | |
4200 | } | |
4201 | ||
4202 | if (flags & UNIT_ESCAPE_C) { | |
4203 | char *a; | |
4204 | ||
4205 | a = cescape(s); | |
4206 | free(ret); | |
4207 | if (!a) | |
4208 | return NULL; | |
4209 | ||
4210 | ret = a; | |
4211 | } | |
4212 | ||
4213 | if (buf) { | |
4214 | *buf = ret; | |
4215 | return ret ?: (char*) s; | |
4216 | } | |
4217 | ||
4218 | return ret ?: strdup(s); | |
4219 | } | |
4220 | ||
4221 | char* unit_concat_strv(char **l, UnitWriteFlags flags) { | |
4222 | _cleanup_free_ char *result = NULL; | |
319a4f4b | 4223 | size_t n = 0; |
ae2a15bc | 4224 | char **i; |
2e59b241 LP |
4225 | |
4226 | /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a | |
4227 | * way suitable for ExecStart= stanzas */ | |
4228 | ||
4229 | STRV_FOREACH(i, l) { | |
4230 | _cleanup_free_ char *buf = NULL; | |
4231 | const char *p; | |
4232 | size_t a; | |
4233 | char *q; | |
4234 | ||
4235 | p = unit_escape_setting(*i, flags, &buf); | |
4236 | if (!p) | |
4237 | return NULL; | |
4238 | ||
4239 | a = (n > 0) + 1 + strlen(p) + 1; /* separating space + " + entry + " */ | |
319a4f4b | 4240 | if (!GREEDY_REALLOC(result, n + a + 1)) |
2e59b241 LP |
4241 | return NULL; |
4242 | ||
4243 | q = result + n; | |
4244 | if (n > 0) | |
4245 | *(q++) = ' '; | |
4246 | ||
4247 | *(q++) = '"'; | |
4248 | q = stpcpy(q, p); | |
4249 | *(q++) = '"'; | |
4250 | ||
4251 | n += a; | |
4252 | } | |
4253 | ||
319a4f4b | 4254 | if (!GREEDY_REALLOC(result, n + 1)) |
2e59b241 LP |
4255 | return NULL; |
4256 | ||
4257 | result[n] = 0; | |
4258 | ||
ae2a15bc | 4259 | return TAKE_PTR(result); |
2e59b241 LP |
4260 | } |
4261 | ||
4262 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data) { | |
4263 | _cleanup_free_ char *p = NULL, *q = NULL, *escaped = NULL; | |
2a9a6f8a | 4264 | const char *dir, *wrapped; |
26d04f86 | 4265 | int r; |
71645aca LP |
4266 | |
4267 | assert(u); | |
2e59b241 LP |
4268 | assert(name); |
4269 | assert(data); | |
4270 | ||
4271 | if (UNIT_WRITE_FLAGS_NOOP(flags)) | |
4272 | return 0; | |
4273 | ||
4274 | data = unit_escape_setting(data, flags, &escaped); | |
4275 | if (!data) | |
4276 | return -ENOMEM; | |
4277 | ||
4278 | /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the | |
4279 | * previous section header is the same */ | |
4280 | ||
4281 | if (flags & UNIT_PRIVATE) { | |
4282 | if (!UNIT_VTABLE(u)->private_section) | |
4283 | return -EINVAL; | |
4284 | ||
4285 | if (!u->transient_file || u->last_section_private < 0) | |
4286 | data = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4287 | else if (u->last_section_private == 0) | |
4288 | data = strjoina("\n[", UNIT_VTABLE(u)->private_section, "]\n", data); | |
4289 | } else { | |
4290 | if (!u->transient_file || u->last_section_private < 0) | |
4291 | data = strjoina("[Unit]\n", data); | |
4292 | else if (u->last_section_private > 0) | |
4293 | data = strjoina("\n[Unit]\n", data); | |
4294 | } | |
71645aca | 4295 | |
4f4afc88 LP |
4296 | if (u->transient_file) { |
4297 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
4298 | * write to the transient unit file. */ | |
4299 | fputs(data, u->transient_file); | |
4f4afc88 | 4300 | |
2e59b241 LP |
4301 | if (!endswith(data, "\n")) |
4302 | fputc('\n', u->transient_file); | |
4303 | ||
4304 | /* Remember which section we wrote this entry to */ | |
4305 | u->last_section_private = !!(flags & UNIT_PRIVATE); | |
8e2af478 | 4306 | return 0; |
2e59b241 | 4307 | } |
8e2af478 | 4308 | |
2e59b241 | 4309 | dir = unit_drop_in_dir(u, flags); |
39591351 LP |
4310 | if (!dir) |
4311 | return -EINVAL; | |
71645aca | 4312 | |
2a9a6f8a | 4313 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 4314 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
4315 | data, |
4316 | "\n"); | |
e20b2a86 | 4317 | |
815b09d3 | 4318 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
4319 | if (r < 0) |
4320 | return r; | |
4321 | ||
45639f1b | 4322 | (void) mkdir_p_label(p, 0755); |
4dba44a5 ZJS |
4323 | |
4324 | /* Make sure the drop-in dir is registered in our path cache. This way we don't need to stupidly | |
4325 | * recreate the cache after every drop-in we write. */ | |
4326 | if (u->manager->unit_path_cache) { | |
be327321 | 4327 | r = set_put_strdup(&u->manager->unit_path_cache, p); |
4dba44a5 ZJS |
4328 | if (r < 0) |
4329 | return r; | |
4330 | } | |
4331 | ||
2a9a6f8a | 4332 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
4333 | if (r < 0) |
4334 | return r; | |
4335 | ||
815b09d3 | 4336 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
4337 | if (r < 0) |
4338 | return r; | |
815b09d3 | 4339 | q = NULL; |
adb76a70 | 4340 | |
adb76a70 WC |
4341 | strv_uniq(u->dropin_paths); |
4342 | ||
4343 | u->dropin_mtime = now(CLOCK_REALTIME); | |
4344 | ||
4345 | return 0; | |
26d04f86 | 4346 | } |
71645aca | 4347 | |
2e59b241 | 4348 | int unit_write_settingf(Unit *u, UnitWriteFlags flags, const char *name, const char *format, ...) { |
b9ec9359 LP |
4349 | _cleanup_free_ char *p = NULL; |
4350 | va_list ap; | |
4351 | int r; | |
4352 | ||
4353 | assert(u); | |
4354 | assert(name); | |
4355 | assert(format); | |
4356 | ||
2e59b241 | 4357 | if (UNIT_WRITE_FLAGS_NOOP(flags)) |
b9ec9359 LP |
4358 | return 0; |
4359 | ||
4360 | va_start(ap, format); | |
4361 | r = vasprintf(&p, format, ap); | |
4362 | va_end(ap); | |
4363 | ||
4364 | if (r < 0) | |
4365 | return -ENOMEM; | |
4366 | ||
2e59b241 | 4367 | return unit_write_setting(u, flags, name, p); |
b9ec9359 | 4368 | } |
71645aca | 4369 | |
c2756a68 | 4370 | int unit_make_transient(Unit *u) { |
0126c8f3 | 4371 | _cleanup_free_ char *path = NULL; |
4f4afc88 | 4372 | FILE *f; |
4f4afc88 | 4373 | |
c2756a68 LP |
4374 | assert(u); |
4375 | ||
3f5e8115 LP |
4376 | if (!UNIT_VTABLE(u)->can_transient) |
4377 | return -EOPNOTSUPP; | |
4378 | ||
45639f1b LP |
4379 | (void) mkdir_p_label(u->manager->lookup_paths.transient, 0755); |
4380 | ||
657ee2d8 | 4381 | path = path_join(u->manager->lookup_paths.transient, u->id); |
4f4afc88 LP |
4382 | if (!path) |
4383 | return -ENOMEM; | |
4384 | ||
4385 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
4386 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
4387 | ||
78e334b5 | 4388 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 4389 | f = fopen(path, "we"); |
0126c8f3 | 4390 | if (!f) |
78e334b5 | 4391 | return -errno; |
4f4afc88 LP |
4392 | } |
4393 | ||
0126c8f3 | 4394 | safe_fclose(u->transient_file); |
4f4afc88 LP |
4395 | u->transient_file = f; |
4396 | ||
0126c8f3 | 4397 | free_and_replace(u->fragment_path, path); |
7c65093a | 4398 | |
7c65093a LP |
4399 | u->source_path = mfree(u->source_path); |
4400 | u->dropin_paths = strv_free(u->dropin_paths); | |
4401 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
4402 | ||
4f4afc88 LP |
4403 | u->load_state = UNIT_STUB; |
4404 | u->load_error = 0; | |
4405 | u->transient = true; | |
4406 | ||
7c65093a LP |
4407 | unit_add_to_dbus_queue(u); |
4408 | unit_add_to_gc_queue(u); | |
c2756a68 | 4409 | |
4f4afc88 LP |
4410 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
4411 | u->transient_file); | |
4412 | ||
3f5e8115 | 4413 | return 0; |
c2756a68 LP |
4414 | } |
4415 | ||
c53d2d54 | 4416 | static int log_kill(pid_t pid, int sig, void *userdata) { |
1d98fef1 LP |
4417 | _cleanup_free_ char *comm = NULL; |
4418 | ||
4419 | (void) get_process_comm(pid, &comm); | |
4420 | ||
4421 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
4422 | only, like for example systemd's own PAM stub process. */ | |
4423 | if (comm && comm[0] == '(') | |
c53d2d54 | 4424 | return 0; |
1d98fef1 LP |
4425 | |
4426 | log_unit_notice(userdata, | |
4427 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
4428 | pid, | |
4429 | strna(comm), | |
4430 | signal_to_string(sig)); | |
c53d2d54 DB |
4431 | |
4432 | return 1; | |
1d98fef1 LP |
4433 | } |
4434 | ||
4ab1670f | 4435 | static int operation_to_signal(const KillContext *c, KillOperation k, bool *noteworthy) { |
1d98fef1 LP |
4436 | assert(c); |
4437 | ||
4438 | switch (k) { | |
4439 | ||
4440 | case KILL_TERMINATE: | |
4441 | case KILL_TERMINATE_AND_LOG: | |
4ab1670f | 4442 | *noteworthy = false; |
1d98fef1 LP |
4443 | return c->kill_signal; |
4444 | ||
a232ebcc | 4445 | case KILL_RESTART: |
4ab1670f | 4446 | *noteworthy = false; |
a232ebcc ZJS |
4447 | return restart_kill_signal(c); |
4448 | ||
1d98fef1 | 4449 | case KILL_KILL: |
4ab1670f | 4450 | *noteworthy = true; |
fbb48d4c | 4451 | return c->final_kill_signal; |
1d98fef1 | 4452 | |
c87700a1 | 4453 | case KILL_WATCHDOG: |
4ab1670f | 4454 | *noteworthy = true; |
c87700a1 | 4455 | return c->watchdog_signal; |
1d98fef1 LP |
4456 | |
4457 | default: | |
4458 | assert_not_reached("KillOperation unknown"); | |
4459 | } | |
4460 | } | |
4461 | ||
cd2086fe LP |
4462 | int unit_kill_context( |
4463 | Unit *u, | |
4464 | KillContext *c, | |
db2cb23b | 4465 | KillOperation k, |
cd2086fe LP |
4466 | pid_t main_pid, |
4467 | pid_t control_pid, | |
4468 | bool main_pid_alien) { | |
4469 | ||
1d98fef1 | 4470 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 4471 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 4472 | int sig, r; |
cd2086fe LP |
4473 | |
4474 | assert(u); | |
4475 | assert(c); | |
4476 | ||
8aff7ac4 LP |
4477 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. Returns > 0 |
4478 | * if we killed something worth waiting for, 0 otherwise. Do not confuse with unit_kill_common() | |
4479 | * which is used for user-requested killing of unit processes. */ | |
1d98fef1 | 4480 | |
cd2086fe LP |
4481 | if (c->kill_mode == KILL_NONE) |
4482 | return 0; | |
4483 | ||
4ab1670f ZJS |
4484 | bool noteworthy; |
4485 | sig = operation_to_signal(c, k, ¬eworthy); | |
4486 | if (noteworthy) | |
4487 | log_func = log_kill; | |
1d98fef1 LP |
4488 | |
4489 | send_sighup = | |
4490 | c->send_sighup && | |
4491 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
4492 | sig != SIGHUP; | |
4493 | ||
cd2086fe | 4494 | if (main_pid > 0) { |
1d98fef1 LP |
4495 | if (log_func) |
4496 | log_func(main_pid, sig, u); | |
cd2086fe | 4497 | |
1d98fef1 | 4498 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
4499 | if (r < 0 && r != -ESRCH) { |
4500 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4501 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 4502 | |
b821a397 | 4503 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 4504 | } else { |
bc6aed7b LP |
4505 | if (!main_pid_alien) |
4506 | wait_for_exit = true; | |
82659fd7 | 4507 | |
1d98fef1 | 4508 | if (r != -ESRCH && send_sighup) |
d0667321 | 4509 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 4510 | } |
cd2086fe LP |
4511 | } |
4512 | ||
4513 | if (control_pid > 0) { | |
1d98fef1 LP |
4514 | if (log_func) |
4515 | log_func(control_pid, sig, u); | |
cd2086fe | 4516 | |
1d98fef1 | 4517 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
4518 | if (r < 0 && r != -ESRCH) { |
4519 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 4520 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 4521 | |
b821a397 | 4522 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 4523 | } else { |
cd2086fe | 4524 | wait_for_exit = true; |
82659fd7 | 4525 | |
1d98fef1 | 4526 | if (r != -ESRCH && send_sighup) |
d0667321 | 4527 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 4528 | } |
cd2086fe LP |
4529 | } |
4530 | ||
b821a397 LP |
4531 | if (u->cgroup_path && |
4532 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4533 | _cleanup_set_free_ Set *pid_set = NULL; |
4534 | ||
82659fd7 LP |
4535 | /* Exclude the main/control pids from being killed via the cgroup */ |
4536 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4537 | if (!pid_set) |
4538 | return -ENOMEM; | |
4539 | ||
1d98fef1 LP |
4540 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4541 | sig, | |
4542 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4543 | pid_set, | |
4544 | log_func, u); | |
cd2086fe | 4545 | if (r < 0) { |
4c701096 | 4546 | if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT)) |
b821a397 LP |
4547 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
4548 | ||
82659fd7 | 4549 | } else if (r > 0) { |
bc6aed7b | 4550 | |
1d9cc876 LP |
4551 | /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if |
4552 | * we are running in a container or if this is a delegation unit, simply because cgroup | |
4553 | * notification is unreliable in these cases. It doesn't work at all in containers, and outside | |
4554 | * of containers it can be confused easily by left-over directories in the cgroup — which | |
4555 | * however should not exist in non-delegated units. On the unified hierarchy that's different, | |
4556 | * there we get proper events. Hence rely on them. */ | |
efdb0237 | 4557 | |
c22800e4 | 4558 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
1d9cc876 | 4559 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 4560 | wait_for_exit = true; |
58ea275a | 4561 | |
1d98fef1 | 4562 | if (send_sighup) { |
82659fd7 LP |
4563 | set_free(pid_set); |
4564 | ||
4565 | pid_set = unit_pid_set(main_pid, control_pid); | |
4566 | if (!pid_set) | |
4567 | return -ENOMEM; | |
4568 | ||
c8aa4b5b LP |
4569 | (void) cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4570 | SIGHUP, | |
4571 | CGROUP_IGNORE_SELF, | |
4572 | pid_set, | |
4573 | NULL, NULL); | |
82659fd7 LP |
4574 | } |
4575 | } | |
cd2086fe LP |
4576 | } |
4577 | ||
4578 | return wait_for_exit; | |
4579 | } | |
4580 | ||
eef85c4a | 4581 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask) { |
a57f7e2c LP |
4582 | int r; |
4583 | ||
4584 | assert(u); | |
4585 | assert(path); | |
4586 | ||
ac19bdd0 ZJS |
4587 | /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these |
4588 | * paths in the unit (from the path to the UnitDependencyInfo structure indicating how to the | |
4589 | * dependency came to be). However, we build a prefix table for all possible prefixes so that new | |
4590 | * appearing mount units can easily determine which units to make themselves a dependency of. */ | |
a57f7e2c | 4591 | |
70b64bd3 ZJS |
4592 | if (!path_is_absolute(path)) |
4593 | return -EINVAL; | |
4594 | ||
ac19bdd0 ZJS |
4595 | if (hashmap_contains(u->requires_mounts_for, path)) /* Exit quickly if the path is already covered. */ |
4596 | return 0; | |
eef85c4a | 4597 | |
ac19bdd0 | 4598 | _cleanup_free_ char *p = strdup(path); |
a57f7e2c LP |
4599 | if (!p) |
4600 | return -ENOMEM; | |
4601 | ||
ac19bdd0 ZJS |
4602 | /* Use the canonical form of the path as the stored key. We call path_is_normalized() |
4603 | * only after simplification, since path_is_normalized() rejects paths with '.'. | |
4604 | * path_is_normalized() also verifies that the path fits in PATH_MAX. */ | |
4ff361cc | 4605 | path = path_simplify(p); |
a57f7e2c | 4606 | |
ca8700e9 | 4607 | if (!path_is_normalized(path)) |
a57f7e2c | 4608 | return -EPERM; |
a57f7e2c | 4609 | |
ac19bdd0 | 4610 | UnitDependencyInfo di = { |
eef85c4a LP |
4611 | .origin_mask = mask |
4612 | }; | |
4613 | ||
ac19bdd0 | 4614 | r = hashmap_ensure_put(&u->requires_mounts_for, &path_hash_ops, p, di.data); |
ca8700e9 | 4615 | if (r < 0) |
a57f7e2c | 4616 | return r; |
ac19bdd0 ZJS |
4617 | assert(r > 0); |
4618 | TAKE_PTR(p); /* path remains a valid pointer to the string stored in the hashmap */ | |
a57f7e2c | 4619 | |
4cb06c59 | 4620 | char prefix[strlen(path) + 1]; |
ca8700e9 | 4621 | PATH_FOREACH_PREFIX_MORE(prefix, path) { |
a57f7e2c LP |
4622 | Set *x; |
4623 | ||
4624 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4625 | if (!x) { | |
ca8700e9 | 4626 | _cleanup_free_ char *q = NULL; |
a57f7e2c | 4627 | |
548f6937 | 4628 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &path_hash_ops); |
742f41ad LP |
4629 | if (r < 0) |
4630 | return r; | |
a57f7e2c LP |
4631 | |
4632 | q = strdup(prefix); | |
4633 | if (!q) | |
4634 | return -ENOMEM; | |
4635 | ||
d5099efc | 4636 | x = set_new(NULL); |
ca8700e9 | 4637 | if (!x) |
a57f7e2c | 4638 | return -ENOMEM; |
a57f7e2c LP |
4639 | |
4640 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4641 | if (r < 0) { | |
a57f7e2c LP |
4642 | set_free(x); |
4643 | return r; | |
4644 | } | |
ca8700e9 | 4645 | q = NULL; |
a57f7e2c LP |
4646 | } |
4647 | ||
4648 | r = set_put(x, u); | |
4649 | if (r < 0) | |
4650 | return r; | |
4651 | } | |
4652 | ||
4653 | return 0; | |
4654 | } | |
4655 | ||
613b411c LP |
4656 | int unit_setup_exec_runtime(Unit *u) { |
4657 | ExecRuntime **rt; | |
4658 | size_t offset; | |
613b411c | 4659 | Unit *other; |
e8a565cb | 4660 | int r; |
613b411c LP |
4661 | |
4662 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4663 | assert(offset > 0); | |
4664 | ||
06b643e7 | 4665 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
4666 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
4667 | if (*rt) | |
4668 | return 0; | |
4669 | ||
4670 | /* Try to get it from somebody else */ | |
15ed3c3a | 4671 | UNIT_FOREACH_DEPENDENCY(other, u, UNIT_ATOM_JOINS_NAMESPACE_OF) { |
e8a565cb YW |
4672 | r = exec_runtime_acquire(u->manager, NULL, other->id, false, rt); |
4673 | if (r == 1) | |
4674 | return 1; | |
613b411c LP |
4675 | } |
4676 | ||
e8a565cb | 4677 | return exec_runtime_acquire(u->manager, unit_get_exec_context(u), u->id, true, rt); |
613b411c LP |
4678 | } |
4679 | ||
29206d46 LP |
4680 | int unit_setup_dynamic_creds(Unit *u) { |
4681 | ExecContext *ec; | |
4682 | DynamicCreds *dcreds; | |
4683 | size_t offset; | |
4684 | ||
4685 | assert(u); | |
4686 | ||
4687 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
4688 | assert(offset > 0); | |
4689 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
4690 | ||
4691 | ec = unit_get_exec_context(u); | |
4692 | assert(ec); | |
4693 | ||
4694 | if (!ec->dynamic_user) | |
4695 | return 0; | |
4696 | ||
4697 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
4698 | } | |
4699 | ||
1c2e9646 LP |
4700 | bool unit_type_supported(UnitType t) { |
4701 | if (_unlikely_(t < 0)) | |
4702 | return false; | |
4703 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
4704 | return false; | |
4705 | ||
4706 | if (!unit_vtable[t]->supported) | |
4707 | return true; | |
4708 | ||
4709 | return unit_vtable[t]->supported(); | |
4710 | } | |
4711 | ||
8b4305c7 LP |
4712 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
4713 | int r; | |
4714 | ||
4715 | assert(u); | |
4716 | assert(where); | |
4717 | ||
c2503e35 RH |
4718 | if (!unit_log_level_test(u, LOG_NOTICE)) |
4719 | return; | |
4720 | ||
8b4305c7 | 4721 | r = dir_is_empty(where); |
3f602115 | 4722 | if (r > 0 || r == -ENOTDIR) |
8b4305c7 LP |
4723 | return; |
4724 | if (r < 0) { | |
4725 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
4726 | return; | |
4727 | } | |
4728 | ||
c2503e35 RH |
4729 | log_unit_struct(u, LOG_NOTICE, |
4730 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
4731 | LOG_UNIT_INVOCATION_ID(u), | |
4732 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
4733 | "WHERE=%s", where); | |
8b4305c7 LP |
4734 | } |
4735 | ||
25cd4964 | 4736 | int unit_fail_if_noncanonical(Unit *u, const char* where) { |
58d9d89b | 4737 | _cleanup_free_ char *canonical_where = NULL; |
8b4305c7 LP |
4738 | int r; |
4739 | ||
4740 | assert(u); | |
4741 | assert(where); | |
4742 | ||
a5648b80 | 4743 | r = chase_symlinks(where, NULL, CHASE_NONEXISTENT, &canonical_where, NULL); |
8b4305c7 | 4744 | if (r < 0) { |
25cd4964 | 4745 | log_unit_debug_errno(u, r, "Failed to check %s for symlinks, ignoring: %m", where); |
8b4305c7 LP |
4746 | return 0; |
4747 | } | |
25cd4964 AJ |
4748 | |
4749 | /* We will happily ignore a trailing slash (or any redundant slashes) */ | |
4750 | if (path_equal(where, canonical_where)) | |
8b4305c7 LP |
4751 | return 0; |
4752 | ||
25cd4964 | 4753 | /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */ |
c2503e35 RH |
4754 | log_unit_struct(u, LOG_ERR, |
4755 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, | |
4756 | LOG_UNIT_INVOCATION_ID(u), | |
4757 | LOG_UNIT_MESSAGE(u, "Mount path %s is not canonical (contains a symlink).", where), | |
4758 | "WHERE=%s", where); | |
8b4305c7 LP |
4759 | |
4760 | return -ELOOP; | |
4761 | } | |
0f13f3bd LP |
4762 | |
4763 | bool unit_is_pristine(Unit *u) { | |
4764 | assert(u); | |
4765 | ||
7c65093a | 4766 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
4767 | * in a number of different ways. Note that to cater for unit |
4768 | * types such as slice, we are generally fine with units that | |
e9e8cbc8 ZJS |
4769 | * are marked UNIT_LOADED even though nothing was actually |
4770 | * loaded, as those unit types don't require a file on disk. */ | |
0f13f3bd LP |
4771 | |
4772 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
4773 | u->fragment_path || | |
4774 | u->source_path || | |
4775 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
4776 | u->job || |
4777 | u->merged_into); | |
4778 | } | |
291d565a LP |
4779 | |
4780 | pid_t unit_control_pid(Unit *u) { | |
4781 | assert(u); | |
4782 | ||
4783 | if (UNIT_VTABLE(u)->control_pid) | |
4784 | return UNIT_VTABLE(u)->control_pid(u); | |
4785 | ||
4786 | return 0; | |
4787 | } | |
4788 | ||
4789 | pid_t unit_main_pid(Unit *u) { | |
4790 | assert(u); | |
4791 | ||
4792 | if (UNIT_VTABLE(u)->main_pid) | |
4793 | return UNIT_VTABLE(u)->main_pid(u); | |
4794 | ||
4795 | return 0; | |
4796 | } | |
00d9ef85 LP |
4797 | |
4798 | static void unit_unref_uid_internal( | |
4799 | Unit *u, | |
4800 | uid_t *ref_uid, | |
4801 | bool destroy_now, | |
4802 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
4803 | ||
4804 | assert(u); | |
4805 | assert(ref_uid); | |
4806 | assert(_manager_unref_uid); | |
4807 | ||
4808 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
4809 | * gid_t are actually the same time, with the same validity rules. | |
4810 | * | |
4811 | * Drops a reference to UID/GID from a unit. */ | |
4812 | ||
4813 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4814 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4815 | ||
4816 | if (!uid_is_valid(*ref_uid)) | |
4817 | return; | |
4818 | ||
4819 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
4820 | *ref_uid = UID_INVALID; | |
4821 | } | |
4822 | ||
b90cf102 | 4823 | static void unit_unref_uid(Unit *u, bool destroy_now) { |
00d9ef85 LP |
4824 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); |
4825 | } | |
4826 | ||
b90cf102 | 4827 | static void unit_unref_gid(Unit *u, bool destroy_now) { |
00d9ef85 LP |
4828 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); |
4829 | } | |
4830 | ||
b90cf102 LP |
4831 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { |
4832 | assert(u); | |
4833 | ||
4834 | unit_unref_uid(u, destroy_now); | |
4835 | unit_unref_gid(u, destroy_now); | |
4836 | } | |
4837 | ||
00d9ef85 LP |
4838 | static int unit_ref_uid_internal( |
4839 | Unit *u, | |
4840 | uid_t *ref_uid, | |
4841 | uid_t uid, | |
4842 | bool clean_ipc, | |
4843 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
4844 | ||
4845 | int r; | |
4846 | ||
4847 | assert(u); | |
4848 | assert(ref_uid); | |
4849 | assert(uid_is_valid(uid)); | |
4850 | assert(_manager_ref_uid); | |
4851 | ||
4852 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
4853 | * are actually the same type, and have the same validity rules. | |
4854 | * | |
4855 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
4856 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
4857 | * drops to zero. */ | |
4858 | ||
4859 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4860 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4861 | ||
4862 | if (*ref_uid == uid) | |
4863 | return 0; | |
4864 | ||
4865 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
4866 | return -EBUSY; | |
4867 | ||
4868 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
4869 | if (r < 0) | |
4870 | return r; | |
4871 | ||
4872 | *ref_uid = uid; | |
4873 | return 1; | |
4874 | } | |
4875 | ||
b90cf102 | 4876 | static int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { |
00d9ef85 LP |
4877 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); |
4878 | } | |
4879 | ||
b90cf102 | 4880 | static int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { |
00d9ef85 LP |
4881 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); |
4882 | } | |
4883 | ||
4884 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
4885 | int r = 0, q = 0; | |
4886 | ||
4887 | assert(u); | |
4888 | ||
4889 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
4890 | ||
4891 | if (uid_is_valid(uid)) { | |
4892 | r = unit_ref_uid(u, uid, clean_ipc); | |
4893 | if (r < 0) | |
4894 | return r; | |
4895 | } | |
4896 | ||
4897 | if (gid_is_valid(gid)) { | |
4898 | q = unit_ref_gid(u, gid, clean_ipc); | |
4899 | if (q < 0) { | |
4900 | if (r > 0) | |
4901 | unit_unref_uid(u, false); | |
4902 | ||
4903 | return q; | |
4904 | } | |
4905 | } | |
4906 | ||
4907 | return r > 0 || q > 0; | |
4908 | } | |
4909 | ||
4910 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
4911 | ExecContext *c; | |
4912 | int r; | |
4913 | ||
4914 | assert(u); | |
4915 | ||
4916 | c = unit_get_exec_context(u); | |
4917 | ||
4918 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
4919 | if (r < 0) | |
4920 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
4921 | ||
4922 | return r; | |
4923 | } | |
4924 | ||
00d9ef85 LP |
4925 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { |
4926 | int r; | |
4927 | ||
4928 | assert(u); | |
4929 | ||
4930 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
4931 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
4932 | * objects when no service references the UID/GID anymore. */ | |
4933 | ||
4934 | r = unit_ref_uid_gid(u, uid, gid); | |
4935 | if (r > 0) | |
37d0b962 | 4936 | unit_add_to_dbus_queue(u); |
00d9ef85 | 4937 | } |
4b58153d | 4938 | |
4b58153d LP |
4939 | int unit_acquire_invocation_id(Unit *u) { |
4940 | sd_id128_t id; | |
4941 | int r; | |
4942 | ||
4943 | assert(u); | |
4944 | ||
4945 | r = sd_id128_randomize(&id); | |
4946 | if (r < 0) | |
4947 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
4948 | ||
4949 | r = unit_set_invocation_id(u, id); | |
4950 | if (r < 0) | |
4951 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
4952 | ||
af92c603 | 4953 | unit_add_to_dbus_queue(u); |
4b58153d LP |
4954 | return 0; |
4955 | } | |
f0d47797 | 4956 | |
1ad6e8b3 LP |
4957 | int unit_set_exec_params(Unit *u, ExecParameters *p) { |
4958 | int r; | |
4959 | ||
7960b0c7 LP |
4960 | assert(u); |
4961 | assert(p); | |
f0d47797 | 4962 | |
004c7f16 | 4963 | /* Copy parameters from manager */ |
1ad6e8b3 LP |
4964 | r = manager_get_effective_environment(u->manager, &p->environment); |
4965 | if (r < 0) | |
4966 | return r; | |
4967 | ||
004c7f16 LP |
4968 | p->confirm_spawn = manager_get_confirm_spawn(u->manager); |
4969 | p->cgroup_supported = u->manager->cgroup_supported; | |
4970 | p->prefix = u->manager->prefix; | |
4971 | SET_FLAG(p->flags, EXEC_PASS_LOG_UNIT|EXEC_CHOWN_DIRECTORIES, MANAGER_IS_SYSTEM(u->manager)); | |
4972 | ||
5238e957 | 4973 | /* Copy parameters from unit */ |
7960b0c7 | 4974 | p->cgroup_path = u->cgroup_path; |
1d9cc876 | 4975 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, unit_cgroup_delegate(u)); |
1ad6e8b3 | 4976 | |
bb0c0d6f LP |
4977 | p->received_credentials = u->manager->received_credentials; |
4978 | ||
1ad6e8b3 | 4979 | return 0; |
f0d47797 | 4980 | } |
a79279c7 | 4981 | |
4c253ed1 | 4982 | int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) { |
a79279c7 LP |
4983 | int r; |
4984 | ||
4985 | assert(u); | |
4986 | assert(ret); | |
4987 | ||
4988 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
4989 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
4990 | ||
4991 | (void) unit_realize_cgroup(u); | |
4992 | ||
4c253ed1 LP |
4993 | r = safe_fork(name, FORK_REOPEN_LOG, ret); |
4994 | if (r != 0) | |
4995 | return r; | |
a79279c7 | 4996 | |
9c274488 LP |
4997 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE); |
4998 | (void) ignore_signals(SIGPIPE); | |
a79279c7 | 4999 | |
4c253ed1 | 5000 | (void) prctl(PR_SET_PDEATHSIG, SIGTERM); |
a79279c7 | 5001 | |
4c253ed1 LP |
5002 | if (u->cgroup_path) { |
5003 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
5004 | if (r < 0) { | |
5005 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", u->cgroup_path); | |
5006 | _exit(EXIT_CGROUP); | |
a79279c7 | 5007 | } |
a79279c7 LP |
5008 | } |
5009 | ||
4c253ed1 | 5010 | return 0; |
a79279c7 | 5011 | } |
c999cf38 | 5012 | |
810ef318 YW |
5013 | int unit_fork_and_watch_rm_rf(Unit *u, char **paths, pid_t *ret_pid) { |
5014 | pid_t pid; | |
5015 | int r; | |
5016 | ||
5017 | assert(u); | |
5018 | assert(ret_pid); | |
5019 | ||
5020 | r = unit_fork_helper_process(u, "(sd-rmrf)", &pid); | |
5021 | if (r < 0) | |
5022 | return r; | |
5023 | if (r == 0) { | |
5024 | int ret = EXIT_SUCCESS; | |
5025 | char **i; | |
5026 | ||
5027 | STRV_FOREACH(i, paths) { | |
5028 | r = rm_rf(*i, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_MISSING_OK); | |
5029 | if (r < 0) { | |
5030 | log_error_errno(r, "Failed to remove '%s': %m", *i); | |
5031 | ret = EXIT_FAILURE; | |
5032 | } | |
5033 | } | |
5034 | ||
5035 | _exit(ret); | |
5036 | } | |
5037 | ||
5038 | r = unit_watch_pid(u, pid, true); | |
5039 | if (r < 0) | |
5040 | return r; | |
5041 | ||
5042 | *ret_pid = pid; | |
5043 | return 0; | |
5044 | } | |
5045 | ||
15ed3c3a LP |
5046 | static void unit_update_dependency_mask(Hashmap *deps, Unit *other, UnitDependencyInfo di) { |
5047 | assert(deps); | |
c999cf38 LP |
5048 | assert(other); |
5049 | ||
15ed3c3a | 5050 | if (di.origin_mask == 0 && di.destination_mask == 0) |
c999cf38 | 5051 | /* No bit set anymore, let's drop the whole entry */ |
15ed3c3a LP |
5052 | assert_se(hashmap_remove(deps, other)); |
5053 | else | |
c999cf38 | 5054 | /* Mask was reduced, let's update the entry */ |
15ed3c3a | 5055 | assert_se(hashmap_update(deps, other, di.data) == 0); |
c999cf38 LP |
5056 | } |
5057 | ||
5058 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask) { | |
15ed3c3a | 5059 | Hashmap *deps; |
c999cf38 LP |
5060 | assert(u); |
5061 | ||
5062 | /* Removes all dependencies u has on other units marked for ownership by 'mask'. */ | |
5063 | ||
5064 | if (mask == 0) | |
5065 | return; | |
5066 | ||
15ed3c3a | 5067 | HASHMAP_FOREACH(deps, u->dependencies) { |
c999cf38 LP |
5068 | bool done; |
5069 | ||
5070 | do { | |
5071 | UnitDependencyInfo di; | |
5072 | Unit *other; | |
c999cf38 LP |
5073 | |
5074 | done = true; | |
5075 | ||
15ed3c3a LP |
5076 | HASHMAP_FOREACH_KEY(di.data, other, deps) { |
5077 | Hashmap *other_deps; | |
5078 | ||
1d6cc5d0 | 5079 | if (FLAGS_SET(~mask, di.origin_mask)) |
c999cf38 | 5080 | continue; |
15ed3c3a | 5081 | |
c999cf38 | 5082 | di.origin_mask &= ~mask; |
15ed3c3a | 5083 | unit_update_dependency_mask(deps, other, di); |
c999cf38 | 5084 | |
defe63b0 LP |
5085 | /* We updated the dependency from our unit to the other unit now. But most |
5086 | * dependencies imply a reverse dependency. Hence, let's delete that one | |
5087 | * too. For that we go through all dependency types on the other unit and | |
5088 | * delete all those which point to us and have the right mask set. */ | |
c999cf38 | 5089 | |
15ed3c3a | 5090 | HASHMAP_FOREACH(other_deps, other->dependencies) { |
c999cf38 LP |
5091 | UnitDependencyInfo dj; |
5092 | ||
15ed3c3a | 5093 | dj.data = hashmap_get(other_deps, u); |
1d6cc5d0 | 5094 | if (FLAGS_SET(~mask, dj.destination_mask)) |
c999cf38 | 5095 | continue; |
c999cf38 | 5096 | |
15ed3c3a LP |
5097 | dj.destination_mask &= ~mask; |
5098 | unit_update_dependency_mask(other_deps, u, dj); | |
c999cf38 LP |
5099 | } |
5100 | ||
5101 | unit_add_to_gc_queue(other); | |
5102 | ||
5103 | done = false; | |
5104 | break; | |
5105 | } | |
5106 | ||
5107 | } while (!done); | |
5108 | } | |
5109 | } | |
d3070fbd | 5110 | |
2f8c48b6 AZ |
5111 | static int unit_get_invocation_path(Unit *u, char **ret) { |
5112 | char *p; | |
5113 | int r; | |
5114 | ||
5115 | assert(u); | |
5116 | assert(ret); | |
5117 | ||
5118 | if (MANAGER_IS_SYSTEM(u->manager)) | |
5119 | p = strjoin("/run/systemd/units/invocation:", u->id); | |
5120 | else { | |
5121 | _cleanup_free_ char *user_path = NULL; | |
5122 | r = xdg_user_runtime_dir(&user_path, "/systemd/units/invocation:"); | |
5123 | if (r < 0) | |
5124 | return r; | |
5125 | p = strjoin(user_path, u->id); | |
5126 | } | |
5127 | ||
5128 | if (!p) | |
5129 | return -ENOMEM; | |
5130 | ||
5131 | *ret = p; | |
5132 | return 0; | |
5133 | } | |
5134 | ||
d3070fbd | 5135 | static int unit_export_invocation_id(Unit *u) { |
2f8c48b6 | 5136 | _cleanup_free_ char *p = NULL; |
d3070fbd LP |
5137 | int r; |
5138 | ||
5139 | assert(u); | |
5140 | ||
5141 | if (u->exported_invocation_id) | |
5142 | return 0; | |
5143 | ||
5144 | if (sd_id128_is_null(u->invocation_id)) | |
5145 | return 0; | |
5146 | ||
2f8c48b6 AZ |
5147 | r = unit_get_invocation_path(u, &p); |
5148 | if (r < 0) | |
5149 | return log_unit_debug_errno(u, r, "Failed to get invocation path: %m"); | |
5150 | ||
a3f5fd96 | 5151 | r = symlink_atomic_label(u->invocation_id_string, p); |
d3070fbd LP |
5152 | if (r < 0) |
5153 | return log_unit_debug_errno(u, r, "Failed to create invocation ID symlink %s: %m", p); | |
5154 | ||
5155 | u->exported_invocation_id = true; | |
5156 | return 0; | |
5157 | } | |
5158 | ||
5159 | static int unit_export_log_level_max(Unit *u, const ExecContext *c) { | |
5160 | const char *p; | |
5161 | char buf[2]; | |
5162 | int r; | |
5163 | ||
5164 | assert(u); | |
5165 | assert(c); | |
5166 | ||
5167 | if (u->exported_log_level_max) | |
5168 | return 0; | |
5169 | ||
5170 | if (c->log_level_max < 0) | |
5171 | return 0; | |
5172 | ||
5173 | assert(c->log_level_max <= 7); | |
5174 | ||
5175 | buf[0] = '0' + c->log_level_max; | |
5176 | buf[1] = 0; | |
5177 | ||
5178 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5179 | r = symlink_atomic(buf, p); | |
5180 | if (r < 0) | |
5181 | return log_unit_debug_errno(u, r, "Failed to create maximum log level symlink %s: %m", p); | |
5182 | ||
5183 | u->exported_log_level_max = true; | |
5184 | return 0; | |
5185 | } | |
5186 | ||
5187 | static int unit_export_log_extra_fields(Unit *u, const ExecContext *c) { | |
5188 | _cleanup_close_ int fd = -1; | |
5189 | struct iovec *iovec; | |
5190 | const char *p; | |
5191 | char *pattern; | |
5192 | le64_t *sizes; | |
5193 | ssize_t n; | |
d3070fbd LP |
5194 | int r; |
5195 | ||
5196 | if (u->exported_log_extra_fields) | |
5197 | return 0; | |
5198 | ||
5199 | if (c->n_log_extra_fields <= 0) | |
5200 | return 0; | |
5201 | ||
5202 | sizes = newa(le64_t, c->n_log_extra_fields); | |
5203 | iovec = newa(struct iovec, c->n_log_extra_fields * 2); | |
5204 | ||
12375b95 | 5205 | for (size_t i = 0; i < c->n_log_extra_fields; i++) { |
d3070fbd LP |
5206 | sizes[i] = htole64(c->log_extra_fields[i].iov_len); |
5207 | ||
5208 | iovec[i*2] = IOVEC_MAKE(sizes + i, sizeof(le64_t)); | |
5209 | iovec[i*2+1] = c->log_extra_fields[i]; | |
5210 | } | |
5211 | ||
5212 | p = strjoina("/run/systemd/units/log-extra-fields:", u->id); | |
5213 | pattern = strjoina(p, ".XXXXXX"); | |
5214 | ||
5215 | fd = mkostemp_safe(pattern); | |
5216 | if (fd < 0) | |
5217 | return log_unit_debug_errno(u, fd, "Failed to create extra fields file %s: %m", p); | |
5218 | ||
5219 | n = writev(fd, iovec, c->n_log_extra_fields*2); | |
5220 | if (n < 0) { | |
5221 | r = log_unit_debug_errno(u, errno, "Failed to write extra fields: %m"); | |
5222 | goto fail; | |
5223 | } | |
5224 | ||
5225 | (void) fchmod(fd, 0644); | |
5226 | ||
5227 | if (rename(pattern, p) < 0) { | |
5228 | r = log_unit_debug_errno(u, errno, "Failed to rename extra fields file: %m"); | |
5229 | goto fail; | |
5230 | } | |
5231 | ||
5232 | u->exported_log_extra_fields = true; | |
5233 | return 0; | |
5234 | ||
5235 | fail: | |
5236 | (void) unlink(pattern); | |
5237 | return r; | |
5238 | } | |
5239 | ||
5ac1530e | 5240 | static int unit_export_log_ratelimit_interval(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5241 | _cleanup_free_ char *buf = NULL; |
5242 | const char *p; | |
5243 | int r; | |
5244 | ||
5245 | assert(u); | |
5246 | assert(c); | |
5247 | ||
5ac1530e | 5248 | if (u->exported_log_ratelimit_interval) |
90fc172e AZ |
5249 | return 0; |
5250 | ||
5ac1530e | 5251 | if (c->log_ratelimit_interval_usec == 0) |
90fc172e AZ |
5252 | return 0; |
5253 | ||
5254 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); | |
5255 | ||
5ac1530e | 5256 | if (asprintf(&buf, "%" PRIu64, c->log_ratelimit_interval_usec) < 0) |
90fc172e AZ |
5257 | return log_oom(); |
5258 | ||
5259 | r = symlink_atomic(buf, p); | |
5260 | if (r < 0) | |
5261 | return log_unit_debug_errno(u, r, "Failed to create log rate limit interval symlink %s: %m", p); | |
5262 | ||
5ac1530e | 5263 | u->exported_log_ratelimit_interval = true; |
90fc172e AZ |
5264 | return 0; |
5265 | } | |
5266 | ||
5ac1530e | 5267 | static int unit_export_log_ratelimit_burst(Unit *u, const ExecContext *c) { |
90fc172e AZ |
5268 | _cleanup_free_ char *buf = NULL; |
5269 | const char *p; | |
5270 | int r; | |
5271 | ||
5272 | assert(u); | |
5273 | assert(c); | |
5274 | ||
5ac1530e | 5275 | if (u->exported_log_ratelimit_burst) |
90fc172e AZ |
5276 | return 0; |
5277 | ||
5ac1530e | 5278 | if (c->log_ratelimit_burst == 0) |
90fc172e AZ |
5279 | return 0; |
5280 | ||
5281 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); | |
5282 | ||
5ac1530e | 5283 | if (asprintf(&buf, "%u", c->log_ratelimit_burst) < 0) |
90fc172e AZ |
5284 | return log_oom(); |
5285 | ||
5286 | r = symlink_atomic(buf, p); | |
5287 | if (r < 0) | |
5288 | return log_unit_debug_errno(u, r, "Failed to create log rate limit burst symlink %s: %m", p); | |
5289 | ||
5ac1530e | 5290 | u->exported_log_ratelimit_burst = true; |
90fc172e AZ |
5291 | return 0; |
5292 | } | |
5293 | ||
d3070fbd LP |
5294 | void unit_export_state_files(Unit *u) { |
5295 | const ExecContext *c; | |
5296 | ||
5297 | assert(u); | |
5298 | ||
5299 | if (!u->id) | |
5300 | return; | |
5301 | ||
638cece4 | 5302 | if (MANAGER_IS_TEST_RUN(u->manager)) |
8f632531 LP |
5303 | return; |
5304 | ||
d3070fbd LP |
5305 | /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data |
5306 | * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as | |
5307 | * the IPC system itself and PID 1 also log to the journal. | |
5308 | * | |
5309 | * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as | |
5310 | * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really | |
5311 | * apply to communication between the journal and systemd, as we assume that these two daemons live in the same | |
5312 | * namespace at least. | |
5313 | * | |
5314 | * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work | |
5315 | * better for storing small bits of data, in particular as we can write them with two system calls, and read | |
5316 | * them with one. */ | |
5317 | ||
5318 | (void) unit_export_invocation_id(u); | |
5319 | ||
2f8c48b6 AZ |
5320 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5321 | return; | |
5322 | ||
d3070fbd LP |
5323 | c = unit_get_exec_context(u); |
5324 | if (c) { | |
5325 | (void) unit_export_log_level_max(u, c); | |
5326 | (void) unit_export_log_extra_fields(u, c); | |
5ac1530e ZJS |
5327 | (void) unit_export_log_ratelimit_interval(u, c); |
5328 | (void) unit_export_log_ratelimit_burst(u, c); | |
d3070fbd LP |
5329 | } |
5330 | } | |
5331 | ||
5332 | void unit_unlink_state_files(Unit *u) { | |
5333 | const char *p; | |
5334 | ||
5335 | assert(u); | |
5336 | ||
5337 | if (!u->id) | |
5338 | return; | |
5339 | ||
d3070fbd LP |
5340 | /* Undoes the effect of unit_export_state() */ |
5341 | ||
5342 | if (u->exported_invocation_id) { | |
2f8c48b6 AZ |
5343 | _cleanup_free_ char *invocation_path = NULL; |
5344 | int r = unit_get_invocation_path(u, &invocation_path); | |
5345 | if (r >= 0) { | |
5346 | (void) unlink(invocation_path); | |
5347 | u->exported_invocation_id = false; | |
5348 | } | |
d3070fbd LP |
5349 | } |
5350 | ||
2f8c48b6 AZ |
5351 | if (!MANAGER_IS_SYSTEM(u->manager)) |
5352 | return; | |
5353 | ||
d3070fbd LP |
5354 | if (u->exported_log_level_max) { |
5355 | p = strjoina("/run/systemd/units/log-level-max:", u->id); | |
5356 | (void) unlink(p); | |
5357 | ||
5358 | u->exported_log_level_max = false; | |
5359 | } | |
5360 | ||
5361 | if (u->exported_log_extra_fields) { | |
5362 | p = strjoina("/run/systemd/units/extra-fields:", u->id); | |
5363 | (void) unlink(p); | |
5364 | ||
5365 | u->exported_log_extra_fields = false; | |
5366 | } | |
90fc172e | 5367 | |
5ac1530e | 5368 | if (u->exported_log_ratelimit_interval) { |
90fc172e AZ |
5369 | p = strjoina("/run/systemd/units/log-rate-limit-interval:", u->id); |
5370 | (void) unlink(p); | |
5371 | ||
5ac1530e | 5372 | u->exported_log_ratelimit_interval = false; |
90fc172e AZ |
5373 | } |
5374 | ||
5ac1530e | 5375 | if (u->exported_log_ratelimit_burst) { |
90fc172e AZ |
5376 | p = strjoina("/run/systemd/units/log-rate-limit-burst:", u->id); |
5377 | (void) unlink(p); | |
5378 | ||
5ac1530e | 5379 | u->exported_log_ratelimit_burst = false; |
90fc172e | 5380 | } |
d3070fbd | 5381 | } |
5afe510c | 5382 | |
3c7416b6 LP |
5383 | int unit_prepare_exec(Unit *u) { |
5384 | int r; | |
5385 | ||
5386 | assert(u); | |
5387 | ||
fab34748 KL |
5388 | /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable. |
5389 | * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */ | |
5390 | r = bpf_firewall_load_custom(u); | |
5391 | if (r < 0) | |
5392 | return r; | |
5393 | ||
3c7416b6 LP |
5394 | /* Prepares everything so that we can fork of a process for this unit */ |
5395 | ||
5396 | (void) unit_realize_cgroup(u); | |
5397 | ||
5398 | if (u->reset_accounting) { | |
9b2559a1 | 5399 | (void) unit_reset_accounting(u); |
3c7416b6 LP |
5400 | u->reset_accounting = false; |
5401 | } | |
5402 | ||
5403 | unit_export_state_files(u); | |
5404 | ||
5405 | r = unit_setup_exec_runtime(u); | |
5406 | if (r < 0) | |
5407 | return r; | |
5408 | ||
5409 | r = unit_setup_dynamic_creds(u); | |
5410 | if (r < 0) | |
5411 | return r; | |
5412 | ||
5413 | return 0; | |
5414 | } | |
5415 | ||
4c425434 LP |
5416 | static bool ignore_leftover_process(const char *comm) { |
5417 | return comm && comm[0] == '('; /* Most likely our own helper process (PAM?), ignore */ | |
5418 | } | |
5419 | ||
5420 | int unit_log_leftover_process_start(pid_t pid, int sig, void *userdata) { | |
a4634b21 LP |
5421 | _cleanup_free_ char *comm = NULL; |
5422 | ||
5423 | (void) get_process_comm(pid, &comm); | |
5424 | ||
4c425434 | 5425 | if (ignore_leftover_process(comm)) |
c53d2d54 | 5426 | return 0; |
a4634b21 | 5427 | |
4c425434 LP |
5428 | /* During start we print a warning */ |
5429 | ||
a4634b21 LP |
5430 | log_unit_warning(userdata, |
5431 | "Found left-over process " PID_FMT " (%s) in control group while starting unit. Ignoring.\n" | |
5432 | "This usually indicates unclean termination of a previous run, or service implementation deficiencies.", | |
5433 | pid, strna(comm)); | |
c53d2d54 DB |
5434 | |
5435 | return 1; | |
a4634b21 LP |
5436 | } |
5437 | ||
4c425434 LP |
5438 | int unit_log_leftover_process_stop(pid_t pid, int sig, void *userdata) { |
5439 | _cleanup_free_ char *comm = NULL; | |
5440 | ||
5441 | (void) get_process_comm(pid, &comm); | |
5442 | ||
5443 | if (ignore_leftover_process(comm)) | |
5444 | return 0; | |
5445 | ||
5446 | /* During stop we only print an informational message */ | |
5447 | ||
5448 | log_unit_info(userdata, | |
5449 | "Unit process " PID_FMT " (%s) remains running after unit stopped.", | |
5450 | pid, strna(comm)); | |
5451 | ||
5452 | return 1; | |
5453 | } | |
5454 | ||
5455 | int unit_warn_leftover_processes(Unit *u, cg_kill_log_func_t log_func) { | |
a4634b21 LP |
5456 | assert(u); |
5457 | ||
5458 | (void) unit_pick_cgroup_path(u); | |
5459 | ||
5460 | if (!u->cgroup_path) | |
c53d2d54 | 5461 | return 0; |
a4634b21 | 5462 | |
4c425434 | 5463 | return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, 0, 0, NULL, log_func, u); |
a4634b21 LP |
5464 | } |
5465 | ||
bb2c7685 LP |
5466 | bool unit_needs_console(Unit *u) { |
5467 | ExecContext *ec; | |
5468 | UnitActiveState state; | |
5469 | ||
5470 | assert(u); | |
5471 | ||
5472 | state = unit_active_state(u); | |
5473 | ||
5474 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) | |
5475 | return false; | |
5476 | ||
5477 | if (UNIT_VTABLE(u)->needs_console) | |
5478 | return UNIT_VTABLE(u)->needs_console(u); | |
5479 | ||
5480 | /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */ | |
5481 | ec = unit_get_exec_context(u); | |
5482 | if (!ec) | |
5483 | return false; | |
5484 | ||
5485 | return exec_context_may_touch_console(ec); | |
5486 | } | |
5487 | ||
f156e60c | 5488 | const char *unit_label_path(const Unit *u) { |
81e9871e LP |
5489 | const char *p; |
5490 | ||
f156e60c CG |
5491 | assert(u); |
5492 | ||
81e9871e LP |
5493 | /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off |
5494 | * when validating access checks. */ | |
5495 | ||
5496 | p = u->source_path ?: u->fragment_path; | |
5497 | if (!p) | |
5498 | return NULL; | |
5499 | ||
5500 | /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */ | |
640f3b14 | 5501 | if (null_or_empty_path(p) > 0) |
81e9871e LP |
5502 | return NULL; |
5503 | ||
5504 | return p; | |
5505 | } | |
5506 | ||
6592b975 LP |
5507 | int unit_pid_attachable(Unit *u, pid_t pid, sd_bus_error *error) { |
5508 | int r; | |
5509 | ||
5510 | assert(u); | |
5511 | ||
5512 | /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself, | |
5513 | * and not a kernel thread either */ | |
5514 | ||
5515 | /* First, a simple range check */ | |
5516 | if (!pid_is_valid(pid)) | |
5517 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process identifier " PID_FMT " is not valid.", pid); | |
5518 | ||
5519 | /* Some extra safety check */ | |
5520 | if (pid == 1 || pid == getpid_cached()) | |
3fe91079 | 5521 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a manager process, refusing.", pid); |
6592b975 LP |
5522 | |
5523 | /* Don't even begin to bother with kernel threads */ | |
5524 | r = is_kernel_thread(pid); | |
5525 | if (r == -ESRCH) | |
5526 | return sd_bus_error_setf(error, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "Process with ID " PID_FMT " does not exist.", pid); | |
5527 | if (r < 0) | |
5528 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether process " PID_FMT " is a kernel thread: %m", pid); | |
5529 | if (r > 0) | |
5530 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Process " PID_FMT " is a kernel thread, refusing.", pid); | |
5531 | ||
5532 | return 0; | |
5533 | } | |
5534 | ||
523ee2d4 LP |
5535 | void unit_log_success(Unit *u) { |
5536 | assert(u); | |
5537 | ||
edf2ee22 JM |
5538 | /* Let's show message "Deactivated successfully" in debug mode (when manager is user) rather than in info mode. |
5539 | * This message has low information value for regular users and it might be a bit overwhelming on a system with | |
5540 | * a lot of devices. */ | |
5541 | log_unit_struct(u, | |
5542 | MANAGER_IS_USER(u->manager) ? LOG_DEBUG : LOG_INFO, | |
c2503e35 RH |
5543 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR, |
5544 | LOG_UNIT_INVOCATION_ID(u), | |
5545 | LOG_UNIT_MESSAGE(u, "Deactivated successfully.")); | |
523ee2d4 LP |
5546 | } |
5547 | ||
7c047d74 LP |
5548 | void unit_log_failure(Unit *u, const char *result) { |
5549 | assert(u); | |
5550 | assert(result); | |
5551 | ||
c2503e35 RH |
5552 | log_unit_struct(u, LOG_WARNING, |
5553 | "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR, | |
5554 | LOG_UNIT_INVOCATION_ID(u), | |
5555 | LOG_UNIT_MESSAGE(u, "Failed with result '%s'.", result), | |
5556 | "UNIT_RESULT=%s", result); | |
7c047d74 LP |
5557 | } |
5558 | ||
31cd5f63 AZ |
5559 | void unit_log_skip(Unit *u, const char *result) { |
5560 | assert(u); | |
5561 | assert(result); | |
5562 | ||
c2503e35 RH |
5563 | log_unit_struct(u, LOG_INFO, |
5564 | "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR, | |
5565 | LOG_UNIT_INVOCATION_ID(u), | |
5566 | LOG_UNIT_MESSAGE(u, "Skipped due to '%s'.", result), | |
5567 | "UNIT_RESULT=%s", result); | |
31cd5f63 AZ |
5568 | } |
5569 | ||
91bbd9b7 LP |
5570 | void unit_log_process_exit( |
5571 | Unit *u, | |
91bbd9b7 LP |
5572 | const char *kind, |
5573 | const char *command, | |
5cc2cd1c | 5574 | bool success, |
91bbd9b7 LP |
5575 | int code, |
5576 | int status) { | |
5577 | ||
5cc2cd1c ZJS |
5578 | int level; |
5579 | ||
91bbd9b7 LP |
5580 | assert(u); |
5581 | assert(kind); | |
5582 | ||
5cc2cd1c ZJS |
5583 | /* If this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure |
5584 | * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption | |
5585 | * that the service already logged the reason at a higher log level on its own. Otherwise, make it a | |
5586 | * WARNING. */ | |
5587 | if (success) | |
5588 | level = LOG_DEBUG; | |
5589 | else if (code == CLD_EXITED) | |
5590 | level = LOG_NOTICE; | |
5591 | else | |
91bbd9b7 LP |
5592 | level = LOG_WARNING; |
5593 | ||
c2503e35 RH |
5594 | log_unit_struct(u, level, |
5595 | "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR, | |
5596 | LOG_UNIT_MESSAGE(u, "%s exited, code=%s, status=%i/%s", | |
5597 | kind, | |
5598 | sigchld_code_to_string(code), status, | |
5599 | strna(code == CLD_EXITED | |
5600 | ? exit_status_to_string(status, EXIT_STATUS_FULL) | |
5601 | : signal_to_string(status))), | |
5602 | "EXIT_CODE=%s", sigchld_code_to_string(code), | |
5603 | "EXIT_STATUS=%i", status, | |
5604 | "COMMAND=%s", strna(command), | |
5605 | LOG_UNIT_INVOCATION_ID(u)); | |
91bbd9b7 LP |
5606 | } |
5607 | ||
7af67e9a LP |
5608 | int unit_exit_status(Unit *u) { |
5609 | assert(u); | |
5610 | ||
5611 | /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range | |
5612 | * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA | |
5613 | * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main | |
5614 | * service process has exited abnormally (signal/coredump). */ | |
5615 | ||
5616 | if (!UNIT_VTABLE(u)->exit_status) | |
5617 | return -EOPNOTSUPP; | |
5618 | ||
5619 | return UNIT_VTABLE(u)->exit_status(u); | |
5620 | } | |
5621 | ||
5622 | int unit_failure_action_exit_status(Unit *u) { | |
5623 | int r; | |
5624 | ||
5625 | assert(u); | |
5626 | ||
5627 | /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */ | |
5628 | ||
5629 | if (u->failure_action_exit_status >= 0) | |
5630 | return u->failure_action_exit_status; | |
5631 | ||
5632 | r = unit_exit_status(u); | |
5633 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5634 | return 255; | |
5635 | ||
5636 | return r; | |
5637 | } | |
5638 | ||
5639 | int unit_success_action_exit_status(Unit *u) { | |
5640 | int r; | |
5641 | ||
5642 | assert(u); | |
5643 | ||
5644 | /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */ | |
5645 | ||
5646 | if (u->success_action_exit_status >= 0) | |
5647 | return u->success_action_exit_status; | |
5648 | ||
5649 | r = unit_exit_status(u); | |
5650 | if (r == -EBADE) /* Exited, but not cleanly (i.e. by signal or such) */ | |
5651 | return 255; | |
5652 | ||
5653 | return r; | |
5654 | } | |
5655 | ||
a4191c9f LP |
5656 | int unit_test_trigger_loaded(Unit *u) { |
5657 | Unit *trigger; | |
5658 | ||
5659 | /* Tests whether the unit to trigger is loaded */ | |
5660 | ||
5661 | trigger = UNIT_TRIGGER(u); | |
5662 | if (!trigger) | |
e7b9f4d9 ZJS |
5663 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
5664 | "Refusing to start, no unit to trigger."); | |
a4191c9f | 5665 | if (trigger->load_state != UNIT_LOADED) |
e7b9f4d9 ZJS |
5666 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(ENOENT), |
5667 | "Refusing to start, unit %s to trigger not loaded.", trigger->id); | |
a4191c9f LP |
5668 | |
5669 | return 0; | |
5670 | } | |
5671 | ||
bb0c0d6f LP |
5672 | void unit_destroy_runtime_data(Unit *u, const ExecContext *context) { |
5673 | assert(u); | |
5674 | assert(context); | |
5675 | ||
95939aed YW |
5676 | if (context->runtime_directory_preserve_mode == EXEC_PRESERVE_NO || |
5677 | (context->runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART && !unit_will_restart(u))) | |
5678 | exec_context_destroy_runtime_directory(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME]); | |
bb0c0d6f LP |
5679 | |
5680 | exec_context_destroy_credentials(context, u->manager->prefix[EXEC_DIRECTORY_RUNTIME], u->id); | |
95939aed YW |
5681 | } |
5682 | ||
380dc8b0 LP |
5683 | int unit_clean(Unit *u, ExecCleanMask mask) { |
5684 | UnitActiveState state; | |
5685 | ||
5686 | assert(u); | |
5687 | ||
5688 | /* Special return values: | |
5689 | * | |
5690 | * -EOPNOTSUPP → cleaning not supported for this unit type | |
5691 | * -EUNATCH → cleaning not defined for this resource type | |
5692 | * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has | |
5693 | * a job queued or similar | |
5694 | */ | |
5695 | ||
5696 | if (!UNIT_VTABLE(u)->clean) | |
5697 | return -EOPNOTSUPP; | |
5698 | ||
5699 | if (mask == 0) | |
5700 | return -EUNATCH; | |
5701 | ||
5702 | if (u->load_state != UNIT_LOADED) | |
5703 | return -EBUSY; | |
5704 | ||
5705 | if (u->job) | |
5706 | return -EBUSY; | |
5707 | ||
5708 | state = unit_active_state(u); | |
5709 | if (!IN_SET(state, UNIT_INACTIVE)) | |
5710 | return -EBUSY; | |
5711 | ||
5712 | return UNIT_VTABLE(u)->clean(u, mask); | |
5713 | } | |
5714 | ||
5715 | int unit_can_clean(Unit *u, ExecCleanMask *ret) { | |
5716 | assert(u); | |
5717 | ||
5718 | if (!UNIT_VTABLE(u)->clean || | |
5719 | u->load_state != UNIT_LOADED) { | |
5720 | *ret = 0; | |
5721 | return 0; | |
5722 | } | |
5723 | ||
5724 | /* When the clean() method is set, can_clean() really should be set too */ | |
5725 | assert(UNIT_VTABLE(u)->can_clean); | |
5726 | ||
5727 | return UNIT_VTABLE(u)->can_clean(u, ret); | |
5728 | } | |
5729 | ||
d9e45bc3 MS |
5730 | bool unit_can_freeze(Unit *u) { |
5731 | assert(u); | |
5732 | ||
5733 | if (UNIT_VTABLE(u)->can_freeze) | |
5734 | return UNIT_VTABLE(u)->can_freeze(u); | |
5735 | ||
5736 | return UNIT_VTABLE(u)->freeze; | |
5737 | } | |
5738 | ||
5739 | void unit_frozen(Unit *u) { | |
5740 | assert(u); | |
5741 | ||
5742 | u->freezer_state = FREEZER_FROZEN; | |
5743 | ||
5744 | bus_unit_send_pending_freezer_message(u); | |
5745 | } | |
5746 | ||
5747 | void unit_thawed(Unit *u) { | |
5748 | assert(u); | |
5749 | ||
5750 | u->freezer_state = FREEZER_RUNNING; | |
5751 | ||
5752 | bus_unit_send_pending_freezer_message(u); | |
5753 | } | |
5754 | ||
5755 | static int unit_freezer_action(Unit *u, FreezerAction action) { | |
5756 | UnitActiveState s; | |
5757 | int (*method)(Unit*); | |
5758 | int r; | |
5759 | ||
5760 | assert(u); | |
5761 | assert(IN_SET(action, FREEZER_FREEZE, FREEZER_THAW)); | |
5762 | ||
5763 | method = action == FREEZER_FREEZE ? UNIT_VTABLE(u)->freeze : UNIT_VTABLE(u)->thaw; | |
5764 | if (!method || !cg_freezer_supported()) | |
5765 | return -EOPNOTSUPP; | |
5766 | ||
5767 | if (u->job) | |
5768 | return -EBUSY; | |
5769 | ||
5770 | if (u->load_state != UNIT_LOADED) | |
5771 | return -EHOSTDOWN; | |
5772 | ||
5773 | s = unit_active_state(u); | |
5774 | if (s != UNIT_ACTIVE) | |
5775 | return -EHOSTDOWN; | |
5776 | ||
5777 | if (IN_SET(u->freezer_state, FREEZER_FREEZING, FREEZER_THAWING)) | |
5778 | return -EALREADY; | |
5779 | ||
5780 | r = method(u); | |
5781 | if (r <= 0) | |
5782 | return r; | |
5783 | ||
5784 | return 1; | |
5785 | } | |
5786 | ||
5787 | int unit_freeze(Unit *u) { | |
5788 | return unit_freezer_action(u, FREEZER_FREEZE); | |
5789 | } | |
5790 | ||
5791 | int unit_thaw(Unit *u) { | |
5792 | return unit_freezer_action(u, FREEZER_THAW); | |
5793 | } | |
5794 | ||
5795 | /* Wrappers around low-level cgroup freezer operations common for service and scope units */ | |
5796 | int unit_freeze_vtable_common(Unit *u) { | |
5797 | return unit_cgroup_freezer_action(u, FREEZER_FREEZE); | |
5798 | } | |
5799 | ||
5800 | int unit_thaw_vtable_common(Unit *u) { | |
5801 | return unit_cgroup_freezer_action(u, FREEZER_THAW); | |
5802 | } | |
5803 | ||
5afe510c LP |
5804 | static const char* const collect_mode_table[_COLLECT_MODE_MAX] = { |
5805 | [COLLECT_INACTIVE] = "inactive", | |
5806 | [COLLECT_INACTIVE_OR_FAILED] = "inactive-or-failed", | |
5807 | }; | |
5808 | ||
5809 | DEFINE_STRING_TABLE_LOOKUP(collect_mode, CollectMode); | |
15ed3c3a LP |
5810 | |
5811 | Unit* unit_has_dependency(const Unit *u, UnitDependencyAtom atom, Unit *other) { | |
5812 | Unit *i; | |
5813 | ||
5814 | assert(u); | |
5815 | ||
5816 | /* Checks if the unit has a dependency on 'other' with the specified dependency atom. If 'other' is | |
5817 | * NULL checks if the unit has *any* dependency of that atom. Returns 'other' if found (or if 'other' | |
5818 | * is NULL the first entry found), or NULL if not found. */ | |
5819 | ||
5820 | UNIT_FOREACH_DEPENDENCY(i, u, atom) | |
5821 | if (!other || other == i) | |
5822 | return i; | |
5823 | ||
5824 | return NULL; | |
5825 | } | |
5826 | ||
5827 | int unit_get_dependency_array(const Unit *u, UnitDependencyAtom atom, Unit ***ret_array) { | |
5828 | _cleanup_free_ Unit **array = NULL; | |
5829 | size_t n = 0; | |
5830 | Unit *other; | |
5831 | ||
5832 | assert(u); | |
5833 | assert(ret_array); | |
5834 | ||
5835 | /* Gets a list of units matching a specific atom as array. This is useful when iterating through | |
5836 | * dependencies while modifying them: the array is an "atomic snapshot" of sorts, that can be read | |
48008c1c | 5837 | * while the dependency table is continuously updated. */ |
15ed3c3a LP |
5838 | |
5839 | UNIT_FOREACH_DEPENDENCY(other, u, atom) { | |
5840 | if (!GREEDY_REALLOC(array, n + 1)) | |
5841 | return -ENOMEM; | |
5842 | ||
5843 | array[n++] = other; | |
5844 | } | |
5845 | ||
5846 | *ret_array = TAKE_PTR(array); | |
5847 | ||
5848 | assert(n <= INT_MAX); | |
5849 | return (int) n; | |
5850 | } |