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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
c2f1db8f | 2 | #pragma once |
87f0e418 | 3 | |
a7334b09 LP |
4 | /*** |
5 | This file is part of systemd. | |
6 | ||
7 | Copyright 2010 Lennart Poettering | |
8 | ||
9 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
10 | under the terms of the GNU Lesser General Public License as published by |
11 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
12 | (at your option) any later version. |
13 | ||
14 | systemd is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 17 | Lesser General Public License for more details. |
a7334b09 | 18 | |
5430f7f2 | 19 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
20 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
21 | ***/ | |
22 | ||
87f0e418 LP |
23 | #include <stdbool.h> |
24 | #include <stdlib.h> | |
bbc9006e | 25 | #include <unistd.h> |
87f0e418 | 26 | |
ac155bb8 | 27 | typedef struct Unit Unit; |
87f0e418 | 28 | typedef struct UnitVTable UnitVTable; |
57020a3a | 29 | typedef struct UnitRef UnitRef; |
c6918296 | 30 | typedef struct UnitStatusMessageFormats UnitStatusMessageFormats; |
87f0e418 | 31 | |
6a48d82f | 32 | #include "bpf-program.h" |
134e56dc | 33 | #include "condition.h" |
87a47f99 | 34 | #include "emergency-action.h" |
a4375746 | 35 | #include "install.h" |
71d35b6b | 36 | #include "list.h" |
0a9f8ed0 | 37 | #include "unit-name.h" |
6b659ed8 | 38 | #include "cgroup.h" |
87f0e418 | 39 | |
db2cb23b UTL |
40 | typedef enum KillOperation { |
41 | KILL_TERMINATE, | |
1d98fef1 | 42 | KILL_TERMINATE_AND_LOG, |
db2cb23b UTL |
43 | KILL_KILL, |
44 | KILL_ABORT, | |
4940c0b0 LP |
45 | _KILL_OPERATION_MAX, |
46 | _KILL_OPERATION_INVALID = -1 | |
db2cb23b UTL |
47 | } KillOperation; |
48 | ||
5afe510c LP |
49 | typedef enum CollectMode { |
50 | COLLECT_INACTIVE, | |
51 | COLLECT_INACTIVE_OR_FAILED, | |
52 | _COLLECT_MODE_MAX, | |
53 | _COLLECT_MODE_INVALID = -1, | |
54 | } CollectMode; | |
55 | ||
87f0e418 | 56 | static inline bool UNIT_IS_ACTIVE_OR_RELOADING(UnitActiveState t) { |
3742095b | 57 | return IN_SET(t, UNIT_ACTIVE, UNIT_RELOADING); |
87f0e418 LP |
58 | } |
59 | ||
60 | static inline bool UNIT_IS_ACTIVE_OR_ACTIVATING(UnitActiveState t) { | |
3742095b | 61 | return IN_SET(t, UNIT_ACTIVE, UNIT_ACTIVATING, UNIT_RELOADING); |
87f0e418 LP |
62 | } |
63 | ||
64 | static inline bool UNIT_IS_INACTIVE_OR_DEACTIVATING(UnitActiveState t) { | |
3742095b | 65 | return IN_SET(t, UNIT_INACTIVE, UNIT_FAILED, UNIT_DEACTIVATING); |
6124958c LP |
66 | } |
67 | ||
fdf20a31 | 68 | static inline bool UNIT_IS_INACTIVE_OR_FAILED(UnitActiveState t) { |
3742095b | 69 | return IN_SET(t, UNIT_INACTIVE, UNIT_FAILED); |
87f0e418 LP |
70 | } |
71 | ||
eef85c4a LP |
72 | /* Stores the 'reason' a dependency was created as a bit mask, i.e. due to which configuration source it came to be. We |
73 | * use this so that we can selectively flush out parts of dependencies again. Note that the same dependency might be | |
74 | * created as a result of multiple "reasons", hence the bitmask. */ | |
75 | typedef enum UnitDependencyMask { | |
76 | /* Configured directly by the unit file, .wants/.requries symlink or drop-in, or as an immediate result of a | |
77 | * non-dependency option configured that way. */ | |
78 | UNIT_DEPENDENCY_FILE = 1 << 0, | |
79 | ||
80 | /* As unconditional implicit dependency (not affected by unit configuration — except by the unit name and | |
81 | * type) */ | |
82 | UNIT_DEPENDENCY_IMPLICIT = 1 << 1, | |
83 | ||
84 | /* A dependency effected by DefaultDependencies=yes. Note that dependencies marked this way are conceptually | |
85 | * just a subset of UNIT_DEPENDENCY_FILE, as DefaultDependencies= is itself a unit file setting that can only | |
86 | * be set in unit files. We make this two separate bits only to help debugging how dependencies came to be. */ | |
87 | UNIT_DEPENDENCY_DEFAULT = 1 << 2, | |
88 | ||
89 | /* A dependency created from udev rules */ | |
90 | UNIT_DEPENDENCY_UDEV = 1 << 3, | |
91 | ||
92 | /* A dependency created because of some unit's RequiresMountsFor= setting */ | |
93 | UNIT_DEPENDENCY_PATH = 1 << 4, | |
94 | ||
95 | /* A dependency created because of data read from /proc/self/mountinfo and no other configuration source */ | |
96 | UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT = 1 << 5, | |
97 | ||
98 | /* A dependency created because of data read from /proc/self/mountinfo, but conditionalized by | |
99 | * DefaultDependencies= and thus also involving configuration from UNIT_DEPENDENCY_FILE sources */ | |
100 | UNIT_DEPENDENCY_MOUNTINFO_DEFAULT = 1 << 6, | |
101 | ||
102 | /* A dependency created because of data read from /proc/swaps and no other configuration source */ | |
103 | UNIT_DEPENDENCY_PROC_SWAP = 1 << 7, | |
104 | ||
105 | _UNIT_DEPENDENCY_MASK_FULL = (1 << 8) - 1, | |
106 | } UnitDependencyMask; | |
107 | ||
108 | /* The Unit's dependencies[] hashmaps use this structure as value. It has the same size as a void pointer, and thus can | |
109 | * be stored directly as hashmap value, without any indirection. Note that this stores two masks, as both the origin | |
110 | * and the destination of a dependency might have created it. */ | |
111 | typedef union UnitDependencyInfo { | |
112 | void *data; | |
113 | struct { | |
114 | UnitDependencyMask origin_mask:16; | |
115 | UnitDependencyMask destination_mask:16; | |
116 | } _packed_; | |
117 | } UnitDependencyInfo; | |
118 | ||
ef734fd6 LP |
119 | #include "job.h" |
120 | ||
a016b922 LP |
121 | struct UnitRef { |
122 | /* Keeps tracks of references to a unit. This is useful so | |
123 | * that we can merge two units if necessary and correct all | |
124 | * references to them */ | |
125 | ||
126 | Unit* unit; | |
127 | LIST_FIELDS(UnitRef, refs); | |
128 | }; | |
129 | ||
906c06f6 DM |
130 | typedef enum UnitCGroupBPFState { |
131 | UNIT_CGROUP_BPF_OFF = 0, | |
132 | UNIT_CGROUP_BPF_ON = 1, | |
133 | UNIT_CGROUP_BPF_INVALIDATED = -1, | |
134 | } UnitCGroupBPFState; | |
135 | ||
ac155bb8 | 136 | struct Unit { |
87f0e418 | 137 | Manager *manager; |
23a177ef | 138 | |
87f0e418 LP |
139 | UnitType type; |
140 | UnitLoadState load_state; | |
23a177ef | 141 | Unit *merged_into; |
87f0e418 LP |
142 | |
143 | char *id; /* One name is special because we use it for identification. Points to an entry in the names set */ | |
9e2f7c11 | 144 | char *instance; |
87f0e418 LP |
145 | |
146 | Set *names; | |
87f0e418 | 147 | |
eef85c4a LP |
148 | /* For each dependency type we maintain a Hashmap whose key is the Unit* object, and the value encodes why the |
149 | * dependency exists, using the UnitDependencyInfo type */ | |
150 | Hashmap *dependencies[_UNIT_DEPENDENCY_MAX]; | |
151 | ||
152 | /* Similar, for RequiresMountsFor= path dependencies. The key is the path, the value the UnitDependencyInfo type */ | |
153 | Hashmap *requires_mounts_for; | |
7c8fa05c | 154 | |
87f0e418 | 155 | char *description; |
49dbfa7b | 156 | char **documentation; |
faf919f1 | 157 | |
6be1e7d5 | 158 | char *fragment_path; /* if loaded from a config file this is the primary path to it */ |
1b64d026 | 159 | char *source_path; /* if converted, the source file */ |
ae7a7182 | 160 | char **dropin_paths; |
f78f265f | 161 | |
45fb0699 | 162 | usec_t fragment_mtime; |
1b64d026 | 163 | usec_t source_mtime; |
ae7a7182 | 164 | usec_t dropin_mtime; |
87f0e418 | 165 | |
4f4afc88 LP |
166 | /* If this is a transient unit we are currently writing, this is where we are writing it to */ |
167 | FILE *transient_file; | |
168 | ||
e0209d83 | 169 | /* If there is something to do with this unit, then this is the installed job for it */ |
87f0e418 LP |
170 | Job *job; |
171 | ||
e0209d83 MS |
172 | /* JOB_NOP jobs are special and can be installed without disturbing the real job. */ |
173 | Job *nop_job; | |
174 | ||
bbc29086 DM |
175 | /* The slot used for watching NameOwnerChanged signals */ |
176 | sd_bus_slot *match_bus_slot; | |
177 | ||
05a98afd LP |
178 | /* References to this unit from clients */ |
179 | sd_bus_track *bus_track; | |
180 | char **deserialized_refs; | |
181 | ||
f189ab18 | 182 | /* Job timeout and action to take */ |
faf919f1 | 183 | usec_t job_timeout; |
a2df3ea4 | 184 | usec_t job_running_timeout; |
eae51da3 | 185 | bool job_running_timeout_set:1; |
87a47f99 | 186 | EmergencyAction job_timeout_action; |
f189ab18 | 187 | char *job_timeout_reboot_arg; |
faf919f1 | 188 | |
57020a3a LP |
189 | /* References to this */ |
190 | LIST_HEAD(UnitRef, refs); | |
191 | ||
52661efd LP |
192 | /* Conditions to check */ |
193 | LIST_HEAD(Condition, conditions); | |
59fccdc5 | 194 | LIST_HEAD(Condition, asserts); |
52661efd | 195 | |
90bbc946 | 196 | dual_timestamp condition_timestamp; |
59fccdc5 | 197 | dual_timestamp assert_timestamp; |
90bbc946 | 198 | |
a483fb59 LP |
199 | /* Updated whenever the low-level state changes */ |
200 | dual_timestamp state_change_timestamp; | |
201 | ||
202 | /* Updated whenever the (high-level) active state enters or leaves the active or inactive states */ | |
63983207 LP |
203 | dual_timestamp inactive_exit_timestamp; |
204 | dual_timestamp active_enter_timestamp; | |
205 | dual_timestamp active_exit_timestamp; | |
206 | dual_timestamp inactive_enter_timestamp; | |
87f0e418 | 207 | |
a016b922 LP |
208 | UnitRef slice; |
209 | ||
ef734fd6 | 210 | /* Per type list */ |
ac155bb8 | 211 | LIST_FIELDS(Unit, units_by_type); |
c1e1601e | 212 | |
7c8fa05c LP |
213 | /* All units which have requires_mounts_for set */ |
214 | LIST_FIELDS(Unit, has_requires_mounts_for); | |
215 | ||
701cc384 | 216 | /* Load queue */ |
ac155bb8 | 217 | LIST_FIELDS(Unit, load_queue); |
701cc384 | 218 | |
c1e1601e | 219 | /* D-Bus queue */ |
ac155bb8 | 220 | LIST_FIELDS(Unit, dbus_queue); |
23a177ef LP |
221 | |
222 | /* Cleanup queue */ | |
ac155bb8 | 223 | LIST_FIELDS(Unit, cleanup_queue); |
9d58f1db | 224 | |
701cc384 | 225 | /* GC queue */ |
ac155bb8 | 226 | LIST_FIELDS(Unit, gc_queue); |
701cc384 | 227 | |
4ad49000 | 228 | /* CGroup realize members queue */ |
91a6073e | 229 | LIST_FIELDS(Unit, cgroup_realize_queue); |
4ad49000 | 230 | |
09e24654 LP |
231 | /* cgroup empty queue */ |
232 | LIST_FIELDS(Unit, cgroup_empty_queue); | |
233 | ||
a911bb9a LP |
234 | /* PIDs we keep an eye on. Note that a unit might have many |
235 | * more, but these are the ones we care enough about to | |
236 | * process SIGCHLD for */ | |
237 | Set *pids; | |
238 | ||
36f20ae3 KW |
239 | /* Used in sigchld event invocation to avoid repeat events being invoked */ |
240 | uint64_t sigchldgen; | |
241 | ||
701cc384 | 242 | /* Used during GC sweeps */ |
eced69b3 | 243 | unsigned gc_marker; |
701cc384 | 244 | |
8821a00f LP |
245 | /* Error code when we didn't manage to load the unit (negative) */ |
246 | int load_error; | |
247 | ||
6bf0f408 LP |
248 | /* Put a ratelimit on unit starting */ |
249 | RateLimit start_limit; | |
87a47f99 | 250 | EmergencyAction start_limit_action; |
53c35a76 LP |
251 | |
252 | EmergencyAction failure_action; | |
e7dfbb4e | 253 | EmergencyAction success_action; |
6bf0f408 LP |
254 | char *reboot_arg; |
255 | ||
67bfdc97 LP |
256 | /* Make sure we never enter endless loops with the check unneeded logic, or the BindsTo= logic */ |
257 | RateLimit auto_stop_ratelimit; | |
bea355da | 258 | |
00d9ef85 LP |
259 | /* Reference to a specific UID/GID */ |
260 | uid_t ref_uid; | |
261 | gid_t ref_gid; | |
262 | ||
d2dc52db | 263 | /* Cached unit file state and preset */ |
a4375746 | 264 | UnitFileState unit_file_state; |
d2dc52db | 265 | int unit_file_preset; |
a4375746 | 266 | |
66ebf6c0 TH |
267 | /* Where the cpu.stat or cpuacct.usage was at the time the unit was started */ |
268 | nsec_t cpu_usage_base; | |
fe700f46 | 269 | nsec_t cpu_usage_last; /* the most recently read value */ |
5ad096b3 | 270 | |
7c52a17b ZJS |
271 | /* Counterparts in the cgroup filesystem */ |
272 | char *cgroup_path; | |
efdb0237 | 273 | CGroupMask cgroup_realized_mask; |
ccf78df1 | 274 | CGroupMask cgroup_enabled_mask; |
efdb0237 LP |
275 | CGroupMask cgroup_subtree_mask; |
276 | CGroupMask cgroup_members_mask; | |
277 | int cgroup_inotify_wd; | |
7c52a17b | 278 | |
6a48d82f DM |
279 | /* IP BPF Firewalling/accounting */ |
280 | int ip_accounting_ingress_map_fd; | |
281 | int ip_accounting_egress_map_fd; | |
282 | ||
283 | int ipv4_allow_map_fd; | |
284 | int ipv6_allow_map_fd; | |
285 | int ipv4_deny_map_fd; | |
286 | int ipv6_deny_map_fd; | |
287 | ||
288 | BPFProgram *ip_bpf_ingress; | |
289 | BPFProgram *ip_bpf_egress; | |
290 | ||
6b659ed8 LP |
291 | uint64_t ip_accounting_extra[_CGROUP_IP_ACCOUNTING_METRIC_MAX]; |
292 | ||
7c52a17b ZJS |
293 | /* How to start OnFailure units */ |
294 | JobMode on_failure_job_mode; | |
295 | ||
5afe510c LP |
296 | /* Tweaking the GC logic */ |
297 | CollectMode collect_mode; | |
298 | ||
4b58153d LP |
299 | /* The current invocation ID */ |
300 | sd_id128_t invocation_id; | |
301 | char invocation_id_string[SD_ID128_STRING_MAX]; /* useful when logging */ | |
302 | ||
9d58f1db LP |
303 | /* Garbage collect us we nobody wants or requires us anymore */ |
304 | bool stop_when_unneeded; | |
305 | ||
35b8ca3a | 306 | /* Create default dependencies */ |
a40eb732 LP |
307 | bool default_dependencies; |
308 | ||
b5e9dba8 LP |
309 | /* Refuse manual starting, allow starting only indirectly via dependency. */ |
310 | bool refuse_manual_start; | |
311 | ||
312 | /* Don't allow the user to stop this unit manually, allow stopping only indirectly via dependency. */ | |
313 | bool refuse_manual_stop; | |
314 | ||
2528a7a6 LP |
315 | /* Allow isolation requests */ |
316 | bool allow_isolate; | |
317 | ||
c8f4d764 LP |
318 | /* Ignore this unit when isolating */ |
319 | bool ignore_on_isolate; | |
320 | ||
49f43d5f | 321 | /* Did the last condition check succeed? */ |
90bbc946 | 322 | bool condition_result; |
59fccdc5 | 323 | bool assert_result; |
90bbc946 | 324 | |
c2756a68 LP |
325 | /* Is this a transient unit? */ |
326 | bool transient; | |
327 | ||
f5869324 LP |
328 | /* Is this a unit that is always running and cannot be stopped? */ |
329 | bool perpetual; | |
330 | ||
9d58f1db LP |
331 | bool in_load_queue:1; |
332 | bool in_dbus_queue:1; | |
333 | bool in_cleanup_queue:1; | |
701cc384 | 334 | bool in_gc_queue:1; |
91a6073e | 335 | bool in_cgroup_realize_queue:1; |
09e24654 | 336 | bool in_cgroup_empty_queue:1; |
701cc384 | 337 | |
9d58f1db | 338 | bool sent_dbus_new_signal:1; |
6c073082 | 339 | |
cd6d0a45 | 340 | bool in_audit:1; |
a57f7e2c LP |
341 | |
342 | bool cgroup_realized:1; | |
bc432dc7 LP |
343 | bool cgroup_members_mask_valid:1; |
344 | bool cgroup_subtree_mask_valid:1; | |
f78f265f | 345 | |
906c06f6 DM |
346 | UnitCGroupBPFState cgroup_bpf_state:2; |
347 | ||
3c7416b6 LP |
348 | /* Reset cgroup accounting next time we fork something off */ |
349 | bool reset_accounting:1; | |
350 | ||
6bf0f408 LP |
351 | bool start_limit_hit:1; |
352 | ||
f78f265f | 353 | /* Did we already invoke unit_coldplug() for this unit? */ |
f8a30ce5 | 354 | bool coldplugged:1; |
05a98afd LP |
355 | |
356 | /* For transient units: whether to add a bus track reference after creating the unit */ | |
357 | bool bus_track_add:1; | |
d3070fbd LP |
358 | |
359 | /* Remember which unit state files we created */ | |
360 | bool exported_invocation_id:1; | |
361 | bool exported_log_level_max:1; | |
362 | bool exported_log_extra_fields:1; | |
2e59b241 LP |
363 | |
364 | /* When writing transient unit files, stores which section we stored last. If < 0, we didn't write any yet. If | |
365 | * == 0 we are in the [Unit] section, if > 0 we are in the unit type-specific section. */ | |
366 | int last_section_private:2; | |
87f0e418 LP |
367 | }; |
368 | ||
c6918296 MS |
369 | struct UnitStatusMessageFormats { |
370 | const char *starting_stopping[2]; | |
371 | const char *finished_start_job[_JOB_RESULT_MAX]; | |
372 | const char *finished_stop_job[_JOB_RESULT_MAX]; | |
373 | }; | |
374 | ||
2e59b241 LP |
375 | /* Flags used when writing drop-in files or transient unit files */ |
376 | typedef enum UnitWriteFlags { | |
377 | /* Write a runtime unit file or drop-in (i.e. one below /run) */ | |
378 | UNIT_RUNTIME = 1 << 0, | |
379 | ||
380 | /* Write a persistent drop-in (i.e. one below /etc) */ | |
381 | UNIT_PERSISTENT = 1 << 1, | |
382 | ||
383 | /* Place this item in the per-unit-type private section, instead of [Unit] */ | |
384 | UNIT_PRIVATE = 1 << 2, | |
385 | ||
386 | /* Apply specifier escaping before writing */ | |
387 | UNIT_ESCAPE_SPECIFIERS = 1 << 3, | |
388 | ||
389 | /* Apply C escaping before writing */ | |
390 | UNIT_ESCAPE_C = 1 << 4, | |
391 | } UnitWriteFlags; | |
392 | ||
393 | /* Returns true if neither persistent, nor runtime storage is requested, i.e. this is a check invocation only */ | |
394 | #define UNIT_WRITE_FLAGS_NOOP(flags) (((flags) & (UNIT_RUNTIME|UNIT_PERSISTENT)) == 0) | |
8e2af478 | 395 | |
71d35b6b | 396 | #include "automount.h" |
87f0e418 | 397 | #include "device.h" |
c1ff5570 | 398 | #include "path.h" |
6c12b52e | 399 | #include "scope.h" |
71d35b6b TA |
400 | #include "slice.h" |
401 | #include "socket.h" | |
402 | #include "swap.h" | |
403 | #include "target.h" | |
404 | #include "timer.h" | |
87f0e418 | 405 | |
87f0e418 | 406 | struct UnitVTable { |
7d17cfbc MS |
407 | /* How much memory does an object of this unit type need */ |
408 | size_t object_size; | |
409 | ||
3ef63c31 LP |
410 | /* If greater than 0, the offset into the object where |
411 | * ExecContext is found, if the unit type has that */ | |
412 | size_t exec_context_offset; | |
413 | ||
4ad49000 LP |
414 | /* If greater than 0, the offset into the object where |
415 | * CGroupContext is found, if the unit type has that */ | |
416 | size_t cgroup_context_offset; | |
417 | ||
718db961 LP |
418 | /* If greater than 0, the offset into the object where |
419 | * KillContext is found, if the unit type has that */ | |
420 | size_t kill_context_offset; | |
421 | ||
613b411c LP |
422 | /* If greater than 0, the offset into the object where the |
423 | * pointer to ExecRuntime is found, if the unit type has | |
424 | * that */ | |
425 | size_t exec_runtime_offset; | |
426 | ||
29206d46 LP |
427 | /* If greater than 0, the offset into the object where the pointer to DynamicCreds is found, if the unit type |
428 | * has that. */ | |
429 | size_t dynamic_creds_offset; | |
430 | ||
ee33e53a | 431 | /* The name of the configuration file section with the private settings of this unit */ |
4ad49000 | 432 | const char *private_section; |
71645aca | 433 | |
f975e971 LP |
434 | /* Config file sections this unit type understands, separated |
435 | * by NUL chars */ | |
436 | const char *sections; | |
437 | ||
e537352b | 438 | /* This should reset all type-specific variables. This should |
a16e1123 LP |
439 | * not allocate memory, and is called with zero-initialized |
440 | * data. It should hence only initialize variables that need | |
441 | * to be set != 0. */ | |
e537352b LP |
442 | void (*init)(Unit *u); |
443 | ||
a16e1123 LP |
444 | /* This should free all type-specific variables. It should be |
445 | * idempotent. */ | |
446 | void (*done)(Unit *u); | |
447 | ||
e537352b LP |
448 | /* Actually load data from disk. This may fail, and should set |
449 | * load_state to UNIT_LOADED, UNIT_MERGED or leave it at | |
450 | * UNIT_STUB if no configuration could be found. */ | |
451 | int (*load)(Unit *u); | |
452 | ||
c5315881 | 453 | /* If a lot of units got created via enumerate(), this is |
be847e82 LP |
454 | * where to actually set the state and call unit_notify(). */ |
455 | int (*coldplug)(Unit *u); | |
87f0e418 LP |
456 | |
457 | void (*dump)(Unit *u, FILE *f, const char *prefix); | |
458 | ||
459 | int (*start)(Unit *u); | |
460 | int (*stop)(Unit *u); | |
461 | int (*reload)(Unit *u); | |
462 | ||
718db961 | 463 | int (*kill)(Unit *u, KillWho w, int signo, sd_bus_error *error); |
8a0867d6 | 464 | |
87f0e418 LP |
465 | bool (*can_reload)(Unit *u); |
466 | ||
a16e1123 LP |
467 | /* Write all data that cannot be restored from other sources |
468 | * away using unit_serialize_item() */ | |
469 | int (*serialize)(Unit *u, FILE *f, FDSet *fds); | |
470 | ||
471 | /* Restore one item from the serialization */ | |
472 | int (*deserialize_item)(Unit *u, const char *key, const char *data, FDSet *fds); | |
473 | ||
01e10de3 | 474 | /* Try to match up fds with what we need for this unit */ |
9ff1a6f1 | 475 | void (*distribute_fds)(Unit *u, FDSet *fds); |
01e10de3 | 476 | |
87f0e418 LP |
477 | /* Boils down the more complex internal state of this unit to |
478 | * a simpler one that the engine can understand */ | |
479 | UnitActiveState (*active_state)(Unit *u); | |
480 | ||
10a94420 LP |
481 | /* Returns the substate specific to this unit type as |
482 | * string. This is purely information so that we can give the | |
35b8ca3a | 483 | * user a more fine grained explanation in which actual state a |
10a94420 LP |
484 | * unit is in. */ |
485 | const char* (*sub_state_to_string)(Unit *u); | |
486 | ||
701cc384 LP |
487 | /* Return true when there is reason to keep this entry around |
488 | * even nothing references it and it isn't active in any | |
489 | * way */ | |
490 | bool (*check_gc)(Unit *u); | |
491 | ||
7eb2a8a1 LP |
492 | /* When the unit is not running and no job for it queued we shall release its runtime resources */ |
493 | void (*release_resources)(Unit *u); | |
a354329f | 494 | |
718db961 | 495 | /* Invoked on every child that died */ |
87f0e418 | 496 | void (*sigchld_event)(Unit *u, pid_t pid, int code, int status); |
7824bbeb | 497 | |
fdf20a31 MM |
498 | /* Reset failed state if we are in failed state */ |
499 | void (*reset_failed)(Unit *u); | |
5632e374 | 500 | |
05e343b7 LP |
501 | /* Called whenever any of the cgroups this unit watches for |
502 | * ran empty */ | |
4ad49000 | 503 | void (*notify_cgroup_empty)(Unit *u); |
8e274523 | 504 | |
8c47c732 | 505 | /* Called whenever a process of this unit sends us a message */ |
a354329f | 506 | void (*notify_message)(Unit *u, pid_t pid, char **tags, FDSet *fds); |
8c47c732 | 507 | |
00d9ef85 | 508 | /* Called whenever a name this Unit registered for comes or goes away. */ |
05e343b7 LP |
509 | void (*bus_name_owner_change)(Unit *u, const char *name, const char *old_owner, const char *new_owner); |
510 | ||
8e2af478 | 511 | /* Called for each property that is being set */ |
2e59b241 | 512 | int (*bus_set_property)(Unit *u, const char *name, sd_bus_message *message, UnitWriteFlags flags, sd_bus_error *error); |
8e2af478 LP |
513 | |
514 | /* Called after at least one property got changed to apply the necessary change */ | |
515 | int (*bus_commit_properties)(Unit *u); | |
516 | ||
a7f241db LP |
517 | /* Return the unit this unit is following */ |
518 | Unit *(*following)(Unit *u); | |
519 | ||
6210e7fc LP |
520 | /* Return the set of units that are following each other */ |
521 | int (*following_set)(Unit *u, Set **s); | |
522 | ||
3ecaa09b LP |
523 | /* Invoked each time a unit this unit is triggering changes |
524 | * state or gains/loses a job */ | |
525 | void (*trigger_notify)(Unit *u, Unit *trigger); | |
526 | ||
8742514c LP |
527 | /* Called whenever CLOCK_REALTIME made a jump */ |
528 | void (*time_change)(Unit *u); | |
529 | ||
7a7821c8 LP |
530 | /* Returns the next timeout of a unit */ |
531 | int (*get_timeout)(Unit *u, usec_t *timeout); | |
68db7a3b | 532 | |
291d565a LP |
533 | /* Returns the main PID if there is any defined, or 0. */ |
534 | pid_t (*main_pid)(Unit *u); | |
535 | ||
536 | /* Returns the main PID if there is any defined, or 0. */ | |
537 | pid_t (*control_pid)(Unit *u); | |
538 | ||
f50e0a01 LP |
539 | /* This is called for each unit type and should be used to |
540 | * enumerate existing devices and load them. However, | |
541 | * everything that is loaded here should still stay in | |
542 | * inactive state. It is the job of the coldplug() call above | |
543 | * to put the units into the initial state. */ | |
ba64af90 | 544 | void (*enumerate)(Manager *m); |
f50e0a01 LP |
545 | |
546 | /* Type specific cleanups. */ | |
7824bbeb | 547 | void (*shutdown)(Manager *m); |
9d58f1db | 548 | |
0faacd47 LP |
549 | /* If this function is set and return false all jobs for units |
550 | * of this type will immediately fail. */ | |
1c2e9646 | 551 | bool (*supported)(void); |
0faacd47 | 552 | |
718db961 LP |
553 | /* The bus vtable */ |
554 | const sd_bus_vtable *bus_vtable; | |
555 | ||
718db961 | 556 | /* The strings to print in status messages */ |
c6918296 MS |
557 | UnitStatusMessageFormats status_message_formats; |
558 | ||
c2756a68 LP |
559 | /* True if transient units of this type are OK */ |
560 | bool can_transient:1; | |
c5a97ed1 LP |
561 | |
562 | /* True if queued jobs of this type should be GC'ed if no other job needs them anymore */ | |
563 | bool gc_jobs:1; | |
87f0e418 LP |
564 | }; |
565 | ||
566 | extern const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX]; | |
567 | ||
ac155bb8 | 568 | #define UNIT_VTABLE(u) unit_vtable[(u)->type] |
87f0e418 LP |
569 | |
570 | /* For casting a unit into the various unit types */ | |
571 | #define DEFINE_CAST(UPPERCASE, MixedCase) \ | |
572 | static inline MixedCase* UPPERCASE(Unit *u) { \ | |
ac155bb8 | 573 | if (_unlikely_(!u || u->type != UNIT_##UPPERCASE)) \ |
87f0e418 LP |
574 | return NULL; \ |
575 | \ | |
576 | return (MixedCase*) u; \ | |
577 | } | |
578 | ||
579 | /* For casting the various unit types into a unit */ | |
ac155bb8 | 580 | #define UNIT(u) (&(u)->meta) |
87f0e418 | 581 | |
35b7ff80 LP |
582 | #define UNIT_HAS_EXEC_CONTEXT(u) (UNIT_VTABLE(u)->exec_context_offset > 0) |
583 | #define UNIT_HAS_CGROUP_CONTEXT(u) (UNIT_VTABLE(u)->cgroup_context_offset > 0) | |
584 | #define UNIT_HAS_KILL_CONTEXT(u) (UNIT_VTABLE(u)->kill_context_offset > 0) | |
585 | ||
eef85c4a | 586 | #define UNIT_TRIGGER(u) ((Unit*) hashmap_first_key((u)->dependencies[UNIT_TRIGGERS])) |
3ecaa09b | 587 | |
87f0e418 | 588 | DEFINE_CAST(SERVICE, Service); |
e821075a | 589 | DEFINE_CAST(SOCKET, Socket); |
87f0e418 LP |
590 | DEFINE_CAST(TARGET, Target); |
591 | DEFINE_CAST(DEVICE, Device); | |
592 | DEFINE_CAST(MOUNT, Mount); | |
593 | DEFINE_CAST(AUTOMOUNT, Automount); | |
07b0b134 | 594 | DEFINE_CAST(SWAP, Swap); |
e821075a | 595 | DEFINE_CAST(TIMER, Timer); |
01f78473 | 596 | DEFINE_CAST(PATH, Path); |
a016b922 | 597 | DEFINE_CAST(SLICE, Slice); |
6c12b52e | 598 | DEFINE_CAST(SCOPE, Scope); |
87f0e418 | 599 | |
7d17cfbc | 600 | Unit *unit_new(Manager *m, size_t size); |
87f0e418 LP |
601 | void unit_free(Unit *u); |
602 | ||
a581e45a | 603 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret); |
87f0e418 | 604 | int unit_add_name(Unit *u, const char *name); |
9e2f7c11 | 605 | |
eef85c4a LP |
606 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference, UnitDependencyMask mask); |
607 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference, UnitDependencyMask mask); | |
2c966c03 | 608 | |
eef85c4a LP |
609 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *filename, bool add_reference, UnitDependencyMask mask); |
610 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference, UnitDependencyMask mask); | |
2c966c03 | 611 | |
23a177ef LP |
612 | int unit_add_exec_dependencies(Unit *u, ExecContext *c); |
613 | ||
0ae97ec1 | 614 | int unit_choose_id(Unit *u, const char *name); |
f50e0a01 | 615 | int unit_set_description(Unit *u, const char *description); |
87f0e418 | 616 | |
701cc384 LP |
617 | bool unit_check_gc(Unit *u); |
618 | ||
87f0e418 | 619 | void unit_add_to_load_queue(Unit *u); |
c1e1601e | 620 | void unit_add_to_dbus_queue(Unit *u); |
23a177ef | 621 | void unit_add_to_cleanup_queue(Unit *u); |
701cc384 | 622 | void unit_add_to_gc_queue(Unit *u); |
87f0e418 LP |
623 | |
624 | int unit_merge(Unit *u, Unit *other); | |
23a177ef LP |
625 | int unit_merge_by_name(Unit *u, const char *other); |
626 | ||
44a6b1b6 | 627 | Unit *unit_follow_merge(Unit *u) _pure_; |
87f0e418 | 628 | |
e537352b LP |
629 | int unit_load_fragment_and_dropin(Unit *u); |
630 | int unit_load_fragment_and_dropin_optional(Unit *u); | |
87f0e418 LP |
631 | int unit_load(Unit *unit); |
632 | ||
d79200e2 LP |
633 | int unit_set_slice(Unit *u, Unit *slice); |
634 | int unit_set_default_slice(Unit *u); | |
a016b922 | 635 | |
44a6b1b6 | 636 | const char *unit_description(Unit *u) _pure_; |
87f0e418 | 637 | |
f278026d LP |
638 | bool unit_has_name(Unit *u, const char *name); |
639 | ||
87f0e418 LP |
640 | UnitActiveState unit_active_state(Unit *u); |
641 | ||
10a94420 LP |
642 | const char* unit_sub_state_to_string(Unit *u); |
643 | ||
87f0e418 LP |
644 | void unit_dump(Unit *u, FILE *f, const char *prefix); |
645 | ||
44a6b1b6 ZJS |
646 | bool unit_can_reload(Unit *u) _pure_; |
647 | bool unit_can_start(Unit *u) _pure_; | |
f5869324 | 648 | bool unit_can_stop(Unit *u) _pure_; |
44a6b1b6 | 649 | bool unit_can_isolate(Unit *u) _pure_; |
87f0e418 LP |
650 | |
651 | int unit_start(Unit *u); | |
652 | int unit_stop(Unit *u); | |
653 | int unit_reload(Unit *u); | |
654 | ||
718db961 LP |
655 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error); |
656 | int unit_kill_common(Unit *u, KillWho who, int signo, pid_t main_pid, pid_t control_pid, sd_bus_error *error); | |
8a0867d6 | 657 | |
e2f3b44c | 658 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success); |
87f0e418 | 659 | |
87f0e418 LP |
660 | int unit_watch_pid(Unit *u, pid_t pid); |
661 | void unit_unwatch_pid(Unit *u, pid_t pid); | |
a911bb9a LP |
662 | void unit_unwatch_all_pids(Unit *u); |
663 | ||
664 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2); | |
87f0e418 | 665 | |
9806e87d | 666 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name); |
05e343b7 LP |
667 | int unit_watch_bus_name(Unit *u, const char *name); |
668 | void unit_unwatch_bus_name(Unit *u, const char *name); | |
669 | ||
87f0e418 LP |
670 | bool unit_job_is_applicable(Unit *u, JobType j); |
671 | ||
0301abf4 LP |
672 | int set_unit_path(const char *p); |
673 | ||
50159e6a | 674 | char *unit_dbus_path(Unit *u); |
4b58153d | 675 | char *unit_dbus_path_invocation_id(Unit *u); |
50159e6a | 676 | |
f6ff8c29 LP |
677 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found); |
678 | ||
44a6b1b6 | 679 | bool unit_can_serialize(Unit *u) _pure_; |
a34ceba6 | 680 | |
6b78f9b4 | 681 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs); |
a16e1123 | 682 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds); |
07429866 | 683 | void unit_deserialize_skip(FILE *f); |
a16e1123 | 684 | |
a34ceba6 LP |
685 | int unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value); |
686 | int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *value); | |
687 | int unit_serialize_item_fd(Unit *u, FILE *f, FDSet *fds, const char *key, int fd); | |
688 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *value, ...) _printf_(4,5); | |
689 | ||
eef85c4a | 690 | int unit_add_node_dependency(Unit *u, const char *what, bool wants, UnitDependency d, UnitDependencyMask mask); |
6e2ef85b | 691 | |
be847e82 | 692 | int unit_coldplug(Unit *u); |
cca098b0 | 693 | |
44b601bc | 694 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) _printf_(3, 0); |
d1a34ae9 | 695 | void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t); |
9e58ff9c | 696 | |
45fb0699 LP |
697 | bool unit_need_daemon_reload(Unit *u); |
698 | ||
fdf20a31 | 699 | void unit_reset_failed(Unit *u); |
5632e374 | 700 | |
a7f241db | 701 | Unit *unit_following(Unit *u); |
eeaedb7c | 702 | int unit_following_set(Unit *u, Set **s); |
a7f241db | 703 | |
9444b1f2 LP |
704 | const char *unit_slice_name(Unit *u); |
705 | ||
44a6b1b6 ZJS |
706 | bool unit_stop_pending(Unit *u) _pure_; |
707 | bool unit_inactive_or_pending(Unit *u) _pure_; | |
31afa0a4 | 708 | bool unit_active_or_pending(Unit *u); |
18ffdfda | 709 | |
bba34eed LP |
710 | int unit_add_default_target_dependency(Unit *u, Unit *target); |
711 | ||
3ecaa09b LP |
712 | void unit_start_on_failure(Unit *u); |
713 | void unit_trigger_notify(Unit *u); | |
c0daa706 | 714 | |
a4375746 | 715 | UnitFileState unit_get_unit_file_state(Unit *u); |
d2dc52db | 716 | int unit_get_unit_file_preset(Unit *u); |
a4375746 | 717 | |
57020a3a LP |
718 | Unit* unit_ref_set(UnitRef *ref, Unit *u); |
719 | void unit_ref_unset(UnitRef *ref); | |
720 | ||
721 | #define UNIT_DEREF(ref) ((ref).unit) | |
9444b1f2 | 722 | #define UNIT_ISSET(ref) (!!(ref).unit) |
57020a3a | 723 | |
598459ce | 724 | int unit_patch_contexts(Unit *u); |
e06c73cc | 725 | |
44a6b1b6 | 726 | ExecContext *unit_get_exec_context(Unit *u) _pure_; |
718db961 | 727 | KillContext *unit_get_kill_context(Unit *u) _pure_; |
4ad49000 | 728 | CGroupContext *unit_get_cgroup_context(Unit *u) _pure_; |
598459ce | 729 | |
613b411c LP |
730 | ExecRuntime *unit_get_exec_runtime(Unit *u) _pure_; |
731 | ||
732 | int unit_setup_exec_runtime(Unit *u); | |
29206d46 | 733 | int unit_setup_dynamic_creds(Unit *u); |
3ef63c31 | 734 | |
2e59b241 LP |
735 | char* unit_escape_setting(const char *s, UnitWriteFlags flags, char **buf); |
736 | char* unit_concat_strv(char **l, UnitWriteFlags flags); | |
b9ec9359 | 737 | |
2e59b241 LP |
738 | int unit_write_setting(Unit *u, UnitWriteFlags flags, const char *name, const char *data); |
739 | int unit_write_settingf(Unit *u, UnitWriteFlags mode, const char *name, const char *format, ...) _printf_(4,5); | |
b9ec9359 | 740 | |
db2cb23b | 741 | int unit_kill_context(Unit *u, KillContext *c, KillOperation k, pid_t main_pid, pid_t control_pid, bool main_pid_alien); |
cd2086fe | 742 | |
c2756a68 LP |
743 | int unit_make_transient(Unit *u); |
744 | ||
eef85c4a | 745 | int unit_require_mounts_for(Unit *u, const char *path, UnitDependencyMask mask); |
a57f7e2c | 746 | |
1c2e9646 LP |
747 | bool unit_type_supported(UnitType t); |
748 | ||
0f13f3bd LP |
749 | bool unit_is_pristine(Unit *u); |
750 | ||
291d565a LP |
751 | pid_t unit_control_pid(Unit *u); |
752 | pid_t unit_main_pid(Unit *u); | |
753 | ||
1c2e9646 LP |
754 | static inline bool unit_supported(Unit *u) { |
755 | return unit_type_supported(u->type); | |
756 | } | |
757 | ||
8b4305c7 LP |
758 | void unit_warn_if_dir_nonempty(Unit *u, const char* where); |
759 | int unit_fail_if_symlink(Unit *u, const char* where); | |
760 | ||
07299350 LP |
761 | int unit_start_limit_test(Unit *u); |
762 | ||
00d9ef85 LP |
763 | void unit_unref_uid(Unit *u, bool destroy_now); |
764 | int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc); | |
765 | ||
766 | void unit_unref_gid(Unit *u, bool destroy_now); | |
767 | int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc); | |
768 | ||
769 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid); | |
770 | void unit_unref_uid_gid(Unit *u, bool destroy_now); | |
771 | ||
772 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid); | |
773 | ||
4b58153d LP |
774 | int unit_set_invocation_id(Unit *u, sd_id128_t id); |
775 | int unit_acquire_invocation_id(Unit *u); | |
776 | ||
c891efaf FB |
777 | bool unit_shall_confirm_spawn(Unit *u); |
778 | ||
f0d47797 LP |
779 | void unit_set_exec_params(Unit *s, ExecParameters *p); |
780 | ||
a79279c7 LP |
781 | int unit_fork_helper_process(Unit *u, pid_t *ret); |
782 | ||
c999cf38 LP |
783 | void unit_remove_dependencies(Unit *u, UnitDependencyMask mask); |
784 | ||
d3070fbd LP |
785 | void unit_export_state_files(Unit *u); |
786 | void unit_unlink_state_files(Unit *u); | |
787 | ||
3c7416b6 LP |
788 | int unit_prepare_exec(Unit *u); |
789 | ||
a4634b21 LP |
790 | void unit_warn_leftover_processes(Unit *u); |
791 | ||
e8e581bf ZJS |
792 | /* Macros which append UNIT= or USER_UNIT= to the message */ |
793 | ||
f2341e0a LP |
794 | #define log_unit_full(unit, level, error, ...) \ |
795 | ({ \ | |
8dec4a9d | 796 | const Unit *_u = (unit); \ |
4b58153d | 797 | _u ? log_object_internal(level, error, __FILE__, __LINE__, __func__, _u->manager->unit_log_field, _u->id, _u->manager->invocation_log_field, _u->invocation_id_string, ##__VA_ARGS__) : \ |
f2341e0a LP |
798 | log_internal(level, error, __FILE__, __LINE__, __func__, ##__VA_ARGS__); \ |
799 | }) | |
800 | ||
801 | #define log_unit_debug(unit, ...) log_unit_full(unit, LOG_DEBUG, 0, ##__VA_ARGS__) | |
802 | #define log_unit_info(unit, ...) log_unit_full(unit, LOG_INFO, 0, ##__VA_ARGS__) | |
803 | #define log_unit_notice(unit, ...) log_unit_full(unit, LOG_NOTICE, 0, ##__VA_ARGS__) | |
804 | #define log_unit_warning(unit, ...) log_unit_full(unit, LOG_WARNING, 0, ##__VA_ARGS__) | |
805 | #define log_unit_error(unit, ...) log_unit_full(unit, LOG_ERR, 0, ##__VA_ARGS__) | |
806 | ||
807 | #define log_unit_debug_errno(unit, error, ...) log_unit_full(unit, LOG_DEBUG, error, ##__VA_ARGS__) | |
808 | #define log_unit_info_errno(unit, error, ...) log_unit_full(unit, LOG_INFO, error, ##__VA_ARGS__) | |
809 | #define log_unit_notice_errno(unit, error, ...) log_unit_full(unit, LOG_NOTICE, error, ##__VA_ARGS__) | |
810 | #define log_unit_warning_errno(unit, error, ...) log_unit_full(unit, LOG_WARNING, error, ##__VA_ARGS__) | |
811 | #define log_unit_error_errno(unit, error, ...) log_unit_full(unit, LOG_ERR, error, ##__VA_ARGS__) | |
812 | ||
813 | #define LOG_UNIT_MESSAGE(unit, fmt, ...) "MESSAGE=%s: " fmt, (unit)->id, ##__VA_ARGS__ | |
814 | #define LOG_UNIT_ID(unit) (unit)->manager->unit_log_format_string, (unit)->id | |
f1c50bec | 815 | #define LOG_UNIT_INVOCATION_ID(unit) (unit)->manager->invocation_log_format_string, (unit)->invocation_id_string |
5afe510c LP |
816 | |
817 | const char* collect_mode_to_string(CollectMode m) _const_; | |
818 | CollectMode collect_mode_from_string(const char *s) _pure_; |