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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a7334b09 | 2 | /*** |
a7334b09 | 3 | Copyright 2010 Lennart Poettering |
a7334b09 LP |
4 | ***/ |
5 | ||
4139c1b2 | 6 | #include "dbus-target.h" |
07630cea | 7 | #include "log.h" |
514f4ef5 | 8 | #include "special.h" |
07630cea | 9 | #include "string-util.h" |
b2bb3dbe | 10 | #include "unit-name.h" |
07630cea LP |
11 | #include "unit.h" |
12 | #include "target.h" | |
c22cbe26 | 13 | |
fa068367 LP |
14 | static const UnitActiveState state_translation_table[_TARGET_STATE_MAX] = { |
15 | [TARGET_DEAD] = UNIT_INACTIVE, | |
16 | [TARGET_ACTIVE] = UNIT_ACTIVE | |
17 | }; | |
18 | ||
fa068367 LP |
19 | static void target_set_state(Target *t, TargetState state) { |
20 | TargetState old_state; | |
21 | assert(t); | |
22 | ||
23 | old_state = t->state; | |
24 | t->state = state; | |
25 | ||
e537352b | 26 | if (state != old_state) |
40d50879 | 27 | log_debug("%s changed %s -> %s", |
1124fe6f | 28 | UNIT(t)->id, |
a16e1123 LP |
29 | target_state_to_string(old_state), |
30 | target_state_to_string(state)); | |
c22cbe26 | 31 | |
2ad2e41a | 32 | unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state], 0); |
fa068367 LP |
33 | } |
34 | ||
a40eb732 | 35 | static int target_add_default_dependencies(Target *t) { |
1850161f | 36 | |
21256a2b LP |
37 | static const UnitDependency deps[] = { |
38 | UNIT_REQUIRES, | |
21256a2b | 39 | UNIT_REQUISITE, |
21256a2b | 40 | UNIT_WANTS, |
1850161f LP |
41 | UNIT_BINDS_TO, |
42 | UNIT_PART_OF | |
21256a2b LP |
43 | }; |
44 | ||
bba34eed | 45 | int r; |
21256a2b | 46 | unsigned k; |
bba34eed | 47 | |
98bc2000 | 48 | assert(t); |
a40eb732 | 49 | |
41c237af IP |
50 | if (!UNIT(t)->default_dependencies) |
51 | return 0; | |
52 | ||
eef85c4a LP |
53 | /* Imply ordering for requirement dependencies on target units. Note that when the user created a contradicting |
54 | * ordering manually we won't add anything in here to make sure we don't create a loop. */ | |
bba34eed | 55 | |
eef85c4a LP |
56 | for (k = 0; k < ELEMENTSOF(deps); k++) { |
57 | Unit *other; | |
58 | Iterator i; | |
59 | void *v; | |
60 | ||
61 | HASHMAP_FOREACH_KEY(v, other, UNIT(t)->dependencies[deps[k]], i) { | |
1850161f LP |
62 | r = unit_add_default_target_dependency(other, UNIT(t)); |
63 | if (r < 0) | |
21256a2b | 64 | return r; |
1850161f | 65 | } |
eef85c4a | 66 | } |
bba34eed | 67 | |
33e28180 LP |
68 | if (unit_has_name(UNIT(t), SPECIAL_SHUTDOWN_TARGET)) |
69 | return 0; | |
70 | ||
b401e1fb | 71 | /* Make sure targets are unloaded on shutdown */ |
eef85c4a | 72 | return unit_add_two_dependencies_by_name(UNIT(t), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true, UNIT_DEPENDENCY_DEFAULT); |
a40eb732 LP |
73 | } |
74 | ||
75 | static int target_load(Unit *u) { | |
76 | Target *t = TARGET(u); | |
77 | int r; | |
78 | ||
79 | assert(t); | |
80 | ||
1850161f LP |
81 | r = unit_load_fragment_and_dropin(u); |
82 | if (r < 0) | |
a40eb732 LP |
83 | return r; |
84 | ||
85 | /* This is a new unit? Then let's add in some extras */ | |
41c237af | 86 | if (u->load_state == UNIT_LOADED) { |
1850161f LP |
87 | r = target_add_default_dependencies(t); |
88 | if (r < 0) | |
89 | return r; | |
a40eb732 LP |
90 | } |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
be847e82 | 95 | static int target_coldplug(Unit *u) { |
a16e1123 LP |
96 | Target *t = TARGET(u); |
97 | ||
98 | assert(t); | |
99 | assert(t->state == TARGET_DEAD); | |
100 | ||
101 | if (t->deserialized_state != t->state) | |
102 | target_set_state(t, t->deserialized_state); | |
103 | ||
104 | return 0; | |
105 | } | |
106 | ||
107 | static void target_dump(Unit *u, FILE *f, const char *prefix) { | |
108 | Target *t = TARGET(u); | |
109 | ||
110 | assert(t); | |
111 | assert(f); | |
112 | ||
113 | fprintf(f, | |
114 | "%sTarget State: %s\n", | |
115 | prefix, target_state_to_string(t->state)); | |
116 | } | |
117 | ||
fa068367 LP |
118 | static int target_start(Unit *u) { |
119 | Target *t = TARGET(u); | |
4b58153d | 120 | int r; |
fa068367 LP |
121 | |
122 | assert(t); | |
123 | assert(t->state == TARGET_DEAD); | |
124 | ||
4b58153d LP |
125 | r = unit_acquire_invocation_id(u); |
126 | if (r < 0) | |
127 | return r; | |
128 | ||
fa068367 | 129 | target_set_state(t, TARGET_ACTIVE); |
82a2b6bb | 130 | return 1; |
fa068367 | 131 | } |
c22cbe26 | 132 | |
fa068367 LP |
133 | static int target_stop(Unit *u) { |
134 | Target *t = TARGET(u); | |
135 | ||
136 | assert(t); | |
137 | assert(t->state == TARGET_ACTIVE); | |
138 | ||
139 | target_set_state(t, TARGET_DEAD); | |
82a2b6bb | 140 | return 1; |
c22cbe26 LP |
141 | } |
142 | ||
a16e1123 LP |
143 | static int target_serialize(Unit *u, FILE *f, FDSet *fds) { |
144 | Target *s = TARGET(u); | |
145 | ||
146 | assert(s); | |
147 | assert(f); | |
148 | assert(fds); | |
149 | ||
150 | unit_serialize_item(u, f, "state", target_state_to_string(s->state)); | |
151 | return 0; | |
152 | } | |
153 | ||
154 | static int target_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
155 | Target *s = TARGET(u); | |
156 | ||
157 | assert(u); | |
158 | assert(key); | |
159 | assert(value); | |
160 | assert(fds); | |
161 | ||
162 | if (streq(key, "state")) { | |
163 | TargetState state; | |
164 | ||
1850161f LP |
165 | state = target_state_from_string(value); |
166 | if (state < 0) | |
a16e1123 LP |
167 | log_debug("Failed to parse state value %s", value); |
168 | else | |
169 | s->deserialized_state = state; | |
170 | ||
171 | } else | |
172 | log_debug("Unknown serialization key '%s'", key); | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
44a6b1b6 | 177 | _pure_ static UnitActiveState target_active_state(Unit *u) { |
fa068367 LP |
178 | assert(u); |
179 | ||
180 | return state_translation_table[TARGET(u)->state]; | |
c22cbe26 LP |
181 | } |
182 | ||
44a6b1b6 | 183 | _pure_ static const char *target_sub_state_to_string(Unit *u) { |
10a94420 LP |
184 | assert(u); |
185 | ||
a16e1123 | 186 | return target_state_to_string(TARGET(u)->state); |
10a94420 LP |
187 | } |
188 | ||
87f0e418 | 189 | const UnitVTable target_vtable = { |
7d17cfbc | 190 | .object_size = sizeof(Target), |
718db961 | 191 | |
f975e971 LP |
192 | .sections = |
193 | "Unit\0" | |
194 | "Target\0" | |
195 | "Install\0", | |
c22cbe26 | 196 | |
a40eb732 | 197 | .load = target_load, |
a16e1123 | 198 | .coldplug = target_coldplug, |
fa068367 LP |
199 | |
200 | .dump = target_dump, | |
201 | ||
202 | .start = target_start, | |
203 | .stop = target_stop, | |
c22cbe26 | 204 | |
a16e1123 LP |
205 | .serialize = target_serialize, |
206 | .deserialize_item = target_deserialize_item, | |
207 | ||
10a94420 | 208 | .active_state = target_active_state, |
4139c1b2 LP |
209 | .sub_state_to_string = target_sub_state_to_string, |
210 | ||
718db961 | 211 | .bus_vtable = bus_target_vtable, |
c6918296 MS |
212 | |
213 | .status_message_formats = { | |
214 | .finished_start_job = { | |
215 | [JOB_DONE] = "Reached target %s.", | |
c6918296 MS |
216 | }, |
217 | .finished_stop_job = { | |
218 | [JOB_DONE] = "Stopped target %s.", | |
219 | }, | |
220 | }, | |
c22cbe26 | 221 | }; |