]>
Commit | Line | Data |
---|---|---|
a016b922 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
a016b922 | 23 | |
07630cea | 24 | #include "dbus-slice.h" |
a016b922 | 25 | #include "log.h" |
a016b922 | 26 | #include "special.h" |
07630cea LP |
27 | #include "string-util.h" |
28 | #include "strv.h" | |
a016b922 | 29 | #include "unit-name.h" |
efdb0237 LP |
30 | #include "unit.h" |
31 | #include "slice.h" | |
a016b922 LP |
32 | |
33 | static const UnitActiveState state_translation_table[_SLICE_STATE_MAX] = { | |
34 | [SLICE_DEAD] = UNIT_INACTIVE, | |
35 | [SLICE_ACTIVE] = UNIT_ACTIVE | |
36 | }; | |
37 | ||
38 | static void slice_set_state(Slice *t, SliceState state) { | |
39 | SliceState old_state; | |
40 | assert(t); | |
41 | ||
42 | old_state = t->state; | |
43 | t->state = state; | |
44 | ||
45 | if (state != old_state) | |
46 | log_debug("%s changed %s -> %s", | |
47 | UNIT(t)->id, | |
48 | slice_state_to_string(old_state), | |
49 | slice_state_to_string(state)); | |
50 | ||
51 | unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state], true); | |
52 | } | |
53 | ||
4ad49000 | 54 | static int slice_add_parent_slice(Slice *s) { |
a016b922 | 55 | char *a, *dash; |
a016b922 | 56 | Unit *parent; |
4ad49000 | 57 | int r; |
a016b922 LP |
58 | |
59 | assert(s); | |
60 | ||
4ad49000 | 61 | if (UNIT_ISSET(UNIT(s)->slice)) |
a016b922 LP |
62 | return 0; |
63 | ||
4ad49000 | 64 | if (unit_has_name(UNIT(s), SPECIAL_ROOT_SLICE)) |
a016b922 LP |
65 | return 0; |
66 | ||
4ad49000 LP |
67 | a = strdupa(UNIT(s)->id); |
68 | dash = strrchr(a, '-'); | |
69 | if (dash) | |
70 | strcpy(dash, ".slice"); | |
71 | else | |
72 | a = (char*) SPECIAL_ROOT_SLICE; | |
a016b922 LP |
73 | |
74 | r = manager_load_unit(UNIT(s)->manager, a, NULL, NULL, &parent); | |
75 | if (r < 0) | |
76 | return r; | |
77 | ||
78 | unit_ref_set(&UNIT(s)->slice, parent); | |
79 | return 0; | |
80 | } | |
81 | ||
82 | static int slice_add_default_dependencies(Slice *s) { | |
83 | int r; | |
84 | ||
85 | assert(s); | |
86 | ||
87 | /* Make sure slices are unloaded on shutdown */ | |
6c12b52e LP |
88 | r = unit_add_two_dependencies_by_name( |
89 | UNIT(s), | |
90 | UNIT_BEFORE, UNIT_CONFLICTS, | |
91 | SPECIAL_SHUTDOWN_TARGET, NULL, true); | |
a016b922 LP |
92 | if (r < 0) |
93 | return r; | |
94 | ||
95 | return 0; | |
96 | } | |
97 | ||
93c47472 | 98 | |
a016b922 | 99 | static int slice_verify(Slice *s) { |
93c47472 LP |
100 | _cleanup_free_ char *parent = NULL; |
101 | int r; | |
102 | ||
a016b922 LP |
103 | assert(s); |
104 | ||
105 | if (UNIT(s)->load_state != UNIT_LOADED) | |
106 | return 0; | |
107 | ||
93c47472 | 108 | if (!slice_name_is_valid(UNIT(s)->id)) { |
f2341e0a | 109 | log_unit_error(UNIT(s), "Slice name %s is not valid. Refusing.", UNIT(s)->id); |
93c47472 LP |
110 | return -EINVAL; |
111 | } | |
112 | ||
113 | r = slice_build_parent_slice(UNIT(s)->id, &parent); | |
114 | if (r < 0) | |
f2341e0a | 115 | return log_unit_error_errno(UNIT(s), r, "Failed to determine parent slice: %m"); |
93c47472 LP |
116 | |
117 | if (parent ? !unit_has_name(UNIT_DEREF(UNIT(s)->slice), parent) : UNIT_ISSET(UNIT(s)->slice)) { | |
f2341e0a | 118 | log_unit_error(UNIT(s), "Located outside of parent slice. Refusing."); |
93c47472 | 119 | return -EINVAL; |
a016b922 LP |
120 | } |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
125 | static int slice_load(Unit *u) { | |
126 | Slice *s = SLICE(u); | |
127 | int r; | |
128 | ||
129 | assert(s); | |
130 | ||
4ad49000 | 131 | r = unit_load_fragment_and_dropin_optional(u); |
a016b922 LP |
132 | if (r < 0) |
133 | return r; | |
134 | ||
135 | /* This is a new unit? Then let's add in some extras */ | |
136 | if (u->load_state == UNIT_LOADED) { | |
137 | ||
598459ce LP |
138 | r = unit_patch_contexts(u); |
139 | if (r < 0) | |
140 | return r; | |
141 | ||
4ad49000 | 142 | r = slice_add_parent_slice(s); |
a016b922 LP |
143 | if (r < 0) |
144 | return r; | |
145 | ||
146 | if (u->default_dependencies) { | |
147 | r = slice_add_default_dependencies(s); | |
148 | if (r < 0) | |
149 | return r; | |
150 | } | |
a016b922 LP |
151 | } |
152 | ||
153 | return slice_verify(s); | |
154 | } | |
155 | ||
be847e82 | 156 | static int slice_coldplug(Unit *u) { |
a016b922 LP |
157 | Slice *t = SLICE(u); |
158 | ||
159 | assert(t); | |
160 | assert(t->state == SLICE_DEAD); | |
161 | ||
162 | if (t->deserialized_state != t->state) | |
163 | slice_set_state(t, t->deserialized_state); | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | static void slice_dump(Unit *u, FILE *f, const char *prefix) { | |
169 | Slice *t = SLICE(u); | |
170 | ||
171 | assert(t); | |
172 | assert(f); | |
173 | ||
174 | fprintf(f, | |
175 | "%sSlice State: %s\n", | |
176 | prefix, slice_state_to_string(t->state)); | |
4ad49000 LP |
177 | |
178 | cgroup_context_dump(&t->cgroup_context, f, prefix); | |
a016b922 LP |
179 | } |
180 | ||
181 | static int slice_start(Unit *u) { | |
182 | Slice *t = SLICE(u); | |
a016b922 LP |
183 | |
184 | assert(t); | |
185 | assert(t->state == SLICE_DEAD); | |
186 | ||
5ad096b3 LP |
187 | (void) unit_realize_cgroup(u); |
188 | (void) unit_reset_cpu_usage(u); | |
a016b922 LP |
189 | |
190 | slice_set_state(t, SLICE_ACTIVE); | |
82a2b6bb | 191 | return 1; |
a016b922 LP |
192 | } |
193 | ||
194 | static int slice_stop(Unit *u) { | |
195 | Slice *t = SLICE(u); | |
196 | ||
197 | assert(t); | |
198 | assert(t->state == SLICE_ACTIVE); | |
199 | ||
4ad49000 LP |
200 | /* We do not need to destroy the cgroup explicitly, |
201 | * unit_notify() will do that for us anyway. */ | |
a016b922 LP |
202 | |
203 | slice_set_state(t, SLICE_DEAD); | |
82a2b6bb | 204 | return 1; |
a016b922 LP |
205 | } |
206 | ||
718db961 | 207 | static int slice_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { |
a016b922 LP |
208 | return unit_kill_common(u, who, signo, -1, -1, error); |
209 | } | |
210 | ||
211 | static int slice_serialize(Unit *u, FILE *f, FDSet *fds) { | |
212 | Slice *s = SLICE(u); | |
213 | ||
214 | assert(s); | |
215 | assert(f); | |
216 | assert(fds); | |
217 | ||
218 | unit_serialize_item(u, f, "state", slice_state_to_string(s->state)); | |
219 | return 0; | |
220 | } | |
221 | ||
222 | static int slice_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
223 | Slice *s = SLICE(u); | |
224 | ||
225 | assert(u); | |
226 | assert(key); | |
227 | assert(value); | |
228 | assert(fds); | |
229 | ||
230 | if (streq(key, "state")) { | |
231 | SliceState state; | |
232 | ||
233 | state = slice_state_from_string(value); | |
234 | if (state < 0) | |
235 | log_debug("Failed to parse state value %s", value); | |
236 | else | |
237 | s->deserialized_state = state; | |
238 | ||
239 | } else | |
240 | log_debug("Unknown serialization key '%s'", key); | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | _pure_ static UnitActiveState slice_active_state(Unit *u) { | |
246 | assert(u); | |
247 | ||
248 | return state_translation_table[SLICE(u)->state]; | |
249 | } | |
250 | ||
251 | _pure_ static const char *slice_sub_state_to_string(Unit *u) { | |
252 | assert(u); | |
253 | ||
254 | return slice_state_to_string(SLICE(u)->state); | |
255 | } | |
256 | ||
efdb0237 LP |
257 | static int slice_enumerate(Manager *m) { |
258 | Unit *u; | |
259 | int r; | |
260 | ||
261 | assert(m); | |
262 | ||
263 | u = manager_get_unit(m, SPECIAL_ROOT_SLICE); | |
264 | if (!u) { | |
265 | u = unit_new(m, sizeof(Slice)); | |
266 | if (!u) | |
267 | return log_oom(); | |
268 | ||
269 | r = unit_add_name(u, SPECIAL_ROOT_SLICE); | |
270 | if (r < 0) { | |
271 | unit_free(u); | |
272 | return log_error_errno(r, "Failed to add -.slice name"); | |
273 | } | |
274 | } | |
275 | ||
276 | u->default_dependencies = false; | |
277 | u->no_gc = true; | |
41780022 LP |
278 | u->ignore_on_isolate = true; |
279 | u->refuse_manual_start = true; | |
280 | u->refuse_manual_stop = true; | |
efdb0237 LP |
281 | SLICE(u)->deserialized_state = SLICE_ACTIVE; |
282 | ||
283 | if (!u->description) | |
284 | u->description = strdup("Root Slice"); | |
285 | if (!u->documentation) | |
286 | (void) strv_extend(&u->documentation, "man:systemd.special(7)"); | |
287 | ||
288 | unit_add_to_load_queue(u); | |
289 | unit_add_to_dbus_queue(u); | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
a016b922 LP |
294 | const UnitVTable slice_vtable = { |
295 | .object_size = sizeof(Slice), | |
718db961 LP |
296 | .cgroup_context_offset = offsetof(Slice, cgroup_context), |
297 | ||
a016b922 LP |
298 | .sections = |
299 | "Unit\0" | |
300 | "Slice\0" | |
301 | "Install\0", | |
4ad49000 | 302 | .private_section = "Slice", |
4ad49000 | 303 | |
a016b922 LP |
304 | .no_alias = true, |
305 | .no_instances = true, | |
306 | ||
307 | .load = slice_load, | |
4ad49000 | 308 | |
a016b922 LP |
309 | .coldplug = slice_coldplug, |
310 | ||
311 | .dump = slice_dump, | |
312 | ||
313 | .start = slice_start, | |
314 | .stop = slice_stop, | |
315 | ||
316 | .kill = slice_kill, | |
317 | ||
318 | .serialize = slice_serialize, | |
319 | .deserialize_item = slice_deserialize_item, | |
320 | ||
321 | .active_state = slice_active_state, | |
322 | .sub_state_to_string = slice_sub_state_to_string, | |
323 | ||
718db961 | 324 | .bus_vtable = bus_slice_vtable, |
8e2af478 LP |
325 | .bus_set_property = bus_slice_set_property, |
326 | .bus_commit_properties = bus_slice_commit_properties, | |
a016b922 | 327 | |
efdb0237 LP |
328 | .enumerate = slice_enumerate, |
329 | ||
a016b922 LP |
330 | .status_message_formats = { |
331 | .finished_start_job = { | |
4ad49000 | 332 | [JOB_DONE] = "Created slice %s.", |
a016b922 LP |
333 | }, |
334 | .finished_stop_job = { | |
4ad49000 | 335 | [JOB_DONE] = "Removed slice %s.", |
a016b922 LP |
336 | }, |
337 | }, | |
338 | }; |