summaryrefslogtreecommitdiffstats
path: root/src/basic/unit-def.h
blob: 6627da5614c24b6a40916afd7d864679af986ed2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once

#include <stdbool.h>

#include "errno-list.h"
#include "glyph-util.h"
#include "macro.h"

/* The enum order is used to order unit jobs in the job queue
 * when other criteria (cpu weight, nice level) are identical.
 * In this case service units have the highest priority. */
typedef enum UnitType {
        UNIT_SERVICE,
        UNIT_MOUNT,
        UNIT_SWAP,
        UNIT_SOCKET,
        UNIT_TARGET,
        UNIT_DEVICE,
        UNIT_AUTOMOUNT,
        UNIT_TIMER,
        UNIT_PATH,
        UNIT_SLICE,
        UNIT_SCOPE,
        _UNIT_TYPE_MAX,
        _UNIT_TYPE_INVALID = -EINVAL,
        _UNIT_TYPE_ERRNO_MAX = -ERRNO_MAX, /* Ensure the whole errno range fits into this enum */
} UnitType;

typedef enum UnitLoadState {
        UNIT_STUB,
        UNIT_LOADED,
        UNIT_NOT_FOUND,    /* error condition #1: unit file not found */
        UNIT_BAD_SETTING,  /* error condition #2: we couldn't parse some essential unit file setting */
        UNIT_ERROR,        /* error condition #3: other "system" error, catchall for the rest */
        UNIT_MERGED,
        UNIT_MASKED,
        _UNIT_LOAD_STATE_MAX,
        _UNIT_LOAD_STATE_INVALID = -EINVAL,
} UnitLoadState;

typedef enum UnitActiveState {
        UNIT_ACTIVE,
        UNIT_RELOADING,
        UNIT_INACTIVE,
        UNIT_FAILED,
        UNIT_ACTIVATING,
        UNIT_DEACTIVATING,
        UNIT_MAINTENANCE,
        _UNIT_ACTIVE_STATE_MAX,
        _UNIT_ACTIVE_STATE_INVALID = -EINVAL,
} UnitActiveState;

typedef enum FreezerState {
        FREEZER_RUNNING,
        FREEZER_FREEZING,
        FREEZER_FROZEN,
        FREEZER_THAWING,
        _FREEZER_STATE_MAX,
        _FREEZER_STATE_INVALID = -EINVAL,
} FreezerState;

typedef enum UnitMarker {
        UNIT_MARKER_NEEDS_RELOAD,
        UNIT_MARKER_NEEDS_RESTART,
        _UNIT_MARKER_MAX,
        _UNIT_MARKER_INVALID = -EINVAL,
} UnitMarker;

typedef enum AutomountState {
        AUTOMOUNT_DEAD,
        AUTOMOUNT_WAITING,
        AUTOMOUNT_RUNNING,
        AUTOMOUNT_FAILED,
        _AUTOMOUNT_STATE_MAX,
        _AUTOMOUNT_STATE_INVALID = -EINVAL,
} AutomountState;

/* We simply watch devices, we cannot plug/unplug them. That
 * simplifies the state engine greatly */
typedef enum DeviceState {
        DEVICE_DEAD,
        DEVICE_TENTATIVE, /* mounted or swapped, but not (yet) announced by udev */
        DEVICE_PLUGGED,   /* announced by udev */
        _DEVICE_STATE_MAX,
        _DEVICE_STATE_INVALID = -EINVAL,
} DeviceState;

typedef enum MountState {
        MOUNT_DEAD,
        MOUNT_MOUNTING,               /* /usr/bin/mount is running, but the mount is not done yet. */
        MOUNT_MOUNTING_DONE,          /* /usr/bin/mount is running, and the mount is done. */
        MOUNT_MOUNTED,
        MOUNT_REMOUNTING,
        MOUNT_UNMOUNTING,
        MOUNT_REMOUNTING_SIGTERM,
        MOUNT_REMOUNTING_SIGKILL,
        MOUNT_UNMOUNTING_SIGTERM,
        MOUNT_UNMOUNTING_SIGKILL,
        MOUNT_FAILED,
        MOUNT_CLEANING,
        _MOUNT_STATE_MAX,
        _MOUNT_STATE_INVALID = -EINVAL,
} MountState;

typedef enum PathState {
        PATH_DEAD,
        PATH_WAITING,
        PATH_RUNNING,
        PATH_FAILED,
        _PATH_STATE_MAX,
        _PATH_STATE_INVALID = -EINVAL,
} PathState;

typedef enum ScopeState {
        SCOPE_DEAD,
        SCOPE_START_CHOWN,
        SCOPE_RUNNING,
        SCOPE_ABANDONED,
        SCOPE_STOP_SIGTERM,
        SCOPE_STOP_SIGKILL,
        SCOPE_FAILED,
        _SCOPE_STATE_MAX,
        _SCOPE_STATE_INVALID = -EINVAL,
} ScopeState;

typedef enum ServiceState {
        SERVICE_DEAD,
        SERVICE_CONDITION,
        SERVICE_START_PRE,
        SERVICE_START,
        SERVICE_START_POST,
        SERVICE_RUNNING,
        SERVICE_EXITED,            /* Nothing is running anymore, but RemainAfterExit is true hence this is OK */
        SERVICE_RELOAD,            /* Reloading via ExecReload= */
        SERVICE_RELOAD_SIGNAL,     /* Reloading via SIGHUP requested */
        SERVICE_RELOAD_NOTIFY,     /* Waiting for READY=1 after RELOADING=1 notify */
        SERVICE_STOP,              /* No STOP_PRE state, instead just register multiple STOP executables */
        SERVICE_STOP_WATCHDOG,
        SERVICE_STOP_SIGTERM,
        SERVICE_STOP_SIGKILL,
        SERVICE_STOP_POST,
        SERVICE_FINAL_WATCHDOG,    /* In case the STOP_POST executable needs to be aborted. */
        SERVICE_FINAL_SIGTERM,     /* In case the STOP_POST executable hangs, we shoot that down, too */
        SERVICE_FINAL_SIGKILL,
        SERVICE_FAILED,
        SERVICE_DEAD_BEFORE_AUTO_RESTART,
        SERVICE_FAILED_BEFORE_AUTO_RESTART,
        SERVICE_DEAD_RESOURCES_PINNED,  /* Like SERVICE_DEAD, but with pinned resources */
        SERVICE_AUTO_RESTART,
        SERVICE_AUTO_RESTART_QUEUED,
        SERVICE_CLEANING,
        _SERVICE_STATE_MAX,
        _SERVICE_STATE_INVALID = -EINVAL,
} ServiceState;

typedef enum SliceState {
        SLICE_DEAD,
        SLICE_ACTIVE,
        _SLICE_STATE_MAX,
        _SLICE_STATE_INVALID = -EINVAL,
} SliceState;

typedef enum SocketState {
        SOCKET_DEAD,
        SOCKET_START_PRE,
        SOCKET_START_CHOWN,
        SOCKET_START_POST,
        SOCKET_LISTENING,
        SOCKET_RUNNING,
        SOCKET_STOP_PRE,
        SOCKET_STOP_PRE_SIGTERM,
        SOCKET_STOP_PRE_SIGKILL,
        SOCKET_STOP_POST,
        SOCKET_FINAL_SIGTERM,
        SOCKET_FINAL_SIGKILL,
        SOCKET_FAILED,
        SOCKET_CLEANING,
        _SOCKET_STATE_MAX,
        _SOCKET_STATE_INVALID = -EINVAL,
} SocketState;

typedef enum SwapState {
        SWAP_DEAD,
        SWAP_ACTIVATING,               /* /sbin/swapon is running, but the swap not yet enabled. */
        SWAP_ACTIVATING_DONE,          /* /sbin/swapon is running, and the swap is done. */
        SWAP_ACTIVE,
        SWAP_DEACTIVATING,
        SWAP_DEACTIVATING_SIGTERM,
        SWAP_DEACTIVATING_SIGKILL,
        SWAP_FAILED,
        SWAP_CLEANING,
        _SWAP_STATE_MAX,
        _SWAP_STATE_INVALID = -EINVAL,
} SwapState;

typedef enum TargetState {
        TARGET_DEAD,
        TARGET_ACTIVE,
        _TARGET_STATE_MAX,
        _TARGET_STATE_INVALID = -EINVAL,
} TargetState;

typedef enum TimerState {
        TIMER_DEAD,
        TIMER_WAITING,
        TIMER_RUNNING,
        TIMER_ELAPSED,
        TIMER_FAILED,
        _TIMER_STATE_MAX,
        _TIMER_STATE_INVALID = -EINVAL,
} TimerState;

typedef enum UnitDependency {
        /* Positive dependencies */
        UNIT_REQUIRES,
        UNIT_REQUISITE,
        UNIT_WANTS,
        UNIT_BINDS_TO,
        UNIT_PART_OF,
        UNIT_UPHOLDS,

        /* Inverse of the above */
        UNIT_REQUIRED_BY,             /* inverse of 'requires' is 'required_by' */
        UNIT_REQUISITE_OF,            /* inverse of 'requisite' is 'requisite_of' */
        UNIT_WANTED_BY,               /* inverse of 'wants' */
        UNIT_BOUND_BY,                /* inverse of 'binds_to' */
        UNIT_CONSISTS_OF,             /* inverse of 'part_of' */
        UNIT_UPHELD_BY,               /* inverse of 'uphold' */

        /* Negative dependencies */
        UNIT_CONFLICTS,               /* inverse of 'conflicts' is 'conflicted_by' */
        UNIT_CONFLICTED_BY,

        /* Order */
        UNIT_BEFORE,                  /* inverse of 'before' is 'after' and vice versa */
        UNIT_AFTER,

        /* OnSuccess= + OnFailure= */
        UNIT_ON_SUCCESS,
        UNIT_ON_SUCCESS_OF,
        UNIT_ON_FAILURE,
        UNIT_ON_FAILURE_OF,

        /* Triggers (i.e. a socket triggers a service) */
        UNIT_TRIGGERS,
        UNIT_TRIGGERED_BY,

        /* Propagate reloads */
        UNIT_PROPAGATES_RELOAD_TO,
        UNIT_RELOAD_PROPAGATED_FROM,

        /* Propagate stops */
        UNIT_PROPAGATES_STOP_TO,
        UNIT_STOP_PROPAGATED_FROM,

        /* Joins namespace of */
        UNIT_JOINS_NAMESPACE_OF,

        /* Reference information for GC logic */
        UNIT_REFERENCES,              /* Inverse of 'references' is 'referenced_by' */
        UNIT_REFERENCED_BY,

        /* Slice= */
        UNIT_IN_SLICE,
        UNIT_SLICE_OF,

        _UNIT_DEPENDENCY_MAX,
        _UNIT_DEPENDENCY_INVALID = -EINVAL,
} UnitDependency;

typedef enum NotifyAccess {
        NOTIFY_NONE,
        NOTIFY_ALL,
        NOTIFY_MAIN,
        NOTIFY_EXEC,
        _NOTIFY_ACCESS_MAX,
        _NOTIFY_ACCESS_INVALID = -EINVAL,
} NotifyAccess;

char *unit_dbus_path_from_name(const char *name);
int unit_name_from_dbus_path(const char *path, char **name);

const char* unit_dbus_interface_from_type(UnitType t);
const char *unit_dbus_interface_from_name(const char *name);

const char *unit_type_to_string(UnitType i) _const_;
UnitType unit_type_from_string(const char *s) _pure_;

const char* unit_type_to_capitalized_string(UnitType t);

const char *unit_load_state_to_string(UnitLoadState i) _const_;
UnitLoadState unit_load_state_from_string(const char *s) _pure_;

const char *unit_active_state_to_string(UnitActiveState i) _const_;
UnitActiveState unit_active_state_from_string(const char *s) _pure_;

const char *freezer_state_to_string(FreezerState i) _const_;
FreezerState freezer_state_from_string(const char *s) _pure_;

const char *unit_marker_to_string(UnitMarker m) _const_;
UnitMarker unit_marker_from_string(const char *s) _pure_;

const char* automount_state_to_string(AutomountState i) _const_;
AutomountState automount_state_from_string(const char *s) _pure_;

const char* device_state_to_string(DeviceState i) _const_;
DeviceState device_state_from_string(const char *s) _pure_;

const char* mount_state_to_string(MountState i) _const_;
MountState mount_state_from_string(const char *s) _pure_;

const char* path_state_to_string(PathState i) _const_;
PathState path_state_from_string(const char *s) _pure_;

const char* scope_state_to_string(ScopeState i) _const_;
ScopeState scope_state_from_string(const char *s) _pure_;

const char* service_state_to_string(ServiceState i) _const_;
ServiceState service_state_from_string(const char *s) _pure_;

const char* slice_state_to_string(SliceState i) _const_;
SliceState slice_state_from_string(const char *s) _pure_;

const char* socket_state_to_string(SocketState i) _const_;
SocketState socket_state_from_string(const char *s) _pure_;

const char* swap_state_to_string(SwapState i) _const_;
SwapState swap_state_from_string(const char *s) _pure_;

const char* target_state_to_string(TargetState i) _const_;
TargetState target_state_from_string(const char *s) _pure_;

const char *timer_state_to_string(TimerState i) _const_;
TimerState timer_state_from_string(const char *s) _pure_;

const char *unit_dependency_to_string(UnitDependency i) _const_;
UnitDependency unit_dependency_from_string(const char *s) _pure_;

const char* notify_access_to_string(NotifyAccess i) _const_;
NotifyAccess notify_access_from_string(const char *s) _pure_;

SpecialGlyph unit_active_state_to_glyph(UnitActiveState state);