1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2013 Lennart Poettering
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.
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.
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/>.
28 #include "load-fragment.h"
30 #include "dbus-slice.h"
32 #include "unit-name.h"
34 static const UnitActiveState state_translation_table[_SLICE_STATE_MAX] = {
35 [SLICE_DEAD] = UNIT_INACTIVE,
36 [SLICE_ACTIVE] = UNIT_ACTIVE
39 static void slice_init(Unit *u) {
43 assert(u->load_state == UNIT_STUB);
45 cgroup_context_init(&s->cgroup_context);
48 static void slice_done(Unit *u) {
53 cgroup_context_done(&s->cgroup_context);
56 static void slice_set_state(Slice *t, SliceState state) {
63 if (state != old_state)
64 log_debug("%s changed %s -> %s",
66 slice_state_to_string(old_state),
67 slice_state_to_string(state));
69 unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state], true);
72 static int slice_add_parent_slice(Slice *s) {
79 if (UNIT_ISSET(UNIT(s)->slice))
82 if (unit_has_name(UNIT(s), SPECIAL_ROOT_SLICE))
85 a = strdupa(UNIT(s)->id);
86 dash = strrchr(a, '-');
88 strcpy(dash, ".slice");
90 a = (char*) SPECIAL_ROOT_SLICE;
92 r = manager_load_unit(UNIT(s)->manager, a, NULL, NULL, &parent);
96 unit_ref_set(&UNIT(s)->slice, parent);
100 static int slice_add_default_dependencies(Slice *s) {
105 /* Make sure slices are unloaded on shutdown */
106 r = unit_add_two_dependencies_by_name(
108 UNIT_BEFORE, UNIT_CONFLICTS,
109 SPECIAL_SHUTDOWN_TARGET, NULL, true);
116 static int slice_verify(Slice *s) {
119 if (UNIT(s)->load_state != UNIT_LOADED)
122 if (UNIT_DEREF(UNIT(s)->slice)) {
125 a = strdupa(UNIT(s)->id);
126 dash = strrchr(a, '-');
128 strcpy(dash, ".slice");
130 a = (char*) SPECIAL_ROOT_SLICE;
132 if (!unit_has_name(UNIT_DEREF(UNIT(s)->slice), a)) {
133 log_error_unit(UNIT(s)->id,
134 "%s located outside its parent slice. Refusing.", UNIT(s)->id);
142 static int slice_load(Unit *u) {
148 r = unit_load_fragment_and_dropin_optional(u);
152 /* This is a new unit? Then let's add in some extras */
153 if (u->load_state == UNIT_LOADED) {
155 r = slice_add_parent_slice(s);
159 if (u->default_dependencies) {
160 r = slice_add_default_dependencies(s);
166 return slice_verify(s);
169 static int slice_coldplug(Unit *u) {
173 assert(t->state == SLICE_DEAD);
175 if (t->deserialized_state != t->state)
176 slice_set_state(t, t->deserialized_state);
181 static void slice_dump(Unit *u, FILE *f, const char *prefix) {
188 "%sSlice State: %s\n",
189 prefix, slice_state_to_string(t->state));
191 cgroup_context_dump(&t->cgroup_context, f, prefix);
194 static int slice_start(Unit *u) {
198 assert(t->state == SLICE_DEAD);
200 unit_realize_cgroup(u);
202 slice_set_state(t, SLICE_ACTIVE);
206 static int slice_stop(Unit *u) {
210 assert(t->state == SLICE_ACTIVE);
212 /* We do not need to destroy the cgroup explicitly,
213 * unit_notify() will do that for us anyway. */
215 slice_set_state(t, SLICE_DEAD);
219 static int slice_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
220 return unit_kill_common(u, who, signo, -1, -1, error);
223 static int slice_serialize(Unit *u, FILE *f, FDSet *fds) {
230 unit_serialize_item(u, f, "state", slice_state_to_string(s->state));
234 static int slice_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
242 if (streq(key, "state")) {
245 state = slice_state_from_string(value);
247 log_debug("Failed to parse state value %s", value);
249 s->deserialized_state = state;
252 log_debug("Unknown serialization key '%s'", key);
257 _pure_ static UnitActiveState slice_active_state(Unit *u) {
260 return state_translation_table[SLICE(u)->state];
263 _pure_ static const char *slice_sub_state_to_string(Unit *u) {
266 return slice_state_to_string(SLICE(u)->state);
269 static const char* const slice_state_table[_SLICE_STATE_MAX] = {
270 [SLICE_DEAD] = "dead",
271 [SLICE_ACTIVE] = "active"
274 DEFINE_STRING_TABLE_LOOKUP(slice_state, SliceState);
276 const UnitVTable slice_vtable = {
277 .object_size = sizeof(Slice),
278 .cgroup_context_offset = offsetof(Slice, cgroup_context),
284 .private_section = "Slice",
287 .no_instances = true,
293 .coldplug = slice_coldplug,
297 .start = slice_start,
302 .serialize = slice_serialize,
303 .deserialize_item = slice_deserialize_item,
305 .active_state = slice_active_state,
306 .sub_state_to_string = slice_sub_state_to_string,
308 .bus_interface = "org.freedesktop.systemd1.Slice",
309 .bus_vtable = bus_slice_vtable,
310 .bus_set_property = bus_slice_set_property,
311 .bus_commit_properties = bus_slice_commit_properties,
313 .status_message_formats = {
314 .finished_start_job = {
315 [JOB_DONE] = "Created slice %s.",
316 [JOB_DEPENDENCY] = "Dependency failed for %s.",
318 .finished_stop_job = {
319 [JOB_DONE] = "Removed slice %s.",