This source file includes following definitions.
- slice_set_state
- slice_add_parent_slice
- slice_add_default_dependencies
- slice_verify
- slice_load
- slice_coldplug
- slice_dump
- slice_start
- slice_stop
- slice_kill
- slice_serialize
- slice_deserialize_item
- slice_active_state
- slice_sub_state_to_string
#include <errno.h>
#include <signal.h>
#include <unistd.h>
#include "unit.h"
#include "slice.h"
#include "load-fragment.h"
#include "log.h"
#include "dbus-slice.h"
#include "special.h"
#include "unit-name.h"
static const UnitActiveState state_translation_table[_SLICE_STATE_MAX] = {
[SLICE_DEAD] = UNIT_INACTIVE,
[SLICE_ACTIVE] = UNIT_ACTIVE
};
static void slice_set_state(Slice *t, SliceState state) {
SliceState old_state;
assert(t);
old_state = t->state;
t->state = state;
if (state != old_state)
log_debug("%s changed %s -> %s",
UNIT(t)->id,
slice_state_to_string(old_state),
slice_state_to_string(state));
unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state], true);
}
static int slice_add_parent_slice(Slice *s) {
char *a, *dash;
Unit *parent;
int r;
assert(s);
if (UNIT_ISSET(UNIT(s)->slice))
return 0;
if (unit_has_name(UNIT(s), SPECIAL_ROOT_SLICE))
return 0;
a = strdupa(UNIT(s)->id);
dash = strrchr(a, '-');
if (dash)
strcpy(dash, ".slice");
else
a = (char*) SPECIAL_ROOT_SLICE;
r = manager_load_unit(UNIT(s)->manager, a, NULL, NULL, &parent);
if (r < 0)
return r;
unit_ref_set(&UNIT(s)->slice, parent);
return 0;
}
static int slice_add_default_dependencies(Slice *s) {
int r;
assert(s);
r = unit_add_two_dependencies_by_name(
UNIT(s),
UNIT_BEFORE, UNIT_CONFLICTS,
SPECIAL_SHUTDOWN_TARGET, NULL, true);
if (r < 0)
return r;
return 0;
}
static int slice_verify(Slice *s) {
assert(s);
if (UNIT(s)->load_state != UNIT_LOADED)
return 0;
if (UNIT_DEREF(UNIT(s)->slice)) {
char *a, *dash;
a = strdupa(UNIT(s)->id);
dash = strrchr(a, '-');
if (dash)
strcpy(dash, ".slice");
else
a = (char*) SPECIAL_ROOT_SLICE;
if (!unit_has_name(UNIT_DEREF(UNIT(s)->slice), a)) {
log_error_unit(UNIT(s)->id,
"%s located outside its parent slice. Refusing.", UNIT(s)->id);
return -EINVAL;
}
}
return 0;
}
static int slice_load(Unit *u) {
Slice *s = SLICE(u);
int r;
assert(s);
r = unit_load_fragment_and_dropin_optional(u);
if (r < 0)
return r;
if (u->load_state == UNIT_LOADED) {
r = unit_patch_contexts(u);
if (r < 0)
return r;
r = slice_add_parent_slice(s);
if (r < 0)
return r;
if (u->default_dependencies) {
r = slice_add_default_dependencies(s);
if (r < 0)
return r;
}
}
return slice_verify(s);
}
static int slice_coldplug(Unit *u) {
Slice *t = SLICE(u);
assert(t);
assert(t->state == SLICE_DEAD);
if (t->deserialized_state != t->state)
slice_set_state(t, t->deserialized_state);
return 0;
}
static void slice_dump(Unit *u, FILE *f, const char *prefix) {
Slice *t = SLICE(u);
assert(t);
assert(f);
fprintf(f,
"%sSlice State: %s\n",
prefix, slice_state_to_string(t->state));
cgroup_context_dump(&t->cgroup_context, f, prefix);
}
static int slice_start(Unit *u) {
Slice *t = SLICE(u);
assert(t);
assert(t->state == SLICE_DEAD);
unit_realize_cgroup(u);
slice_set_state(t, SLICE_ACTIVE);
return 0;
}
static int slice_stop(Unit *u) {
Slice *t = SLICE(u);
assert(t);
assert(t->state == SLICE_ACTIVE);
slice_set_state(t, SLICE_DEAD);
return 0;
}
static int slice_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
return unit_kill_common(u, who, signo, -1, -1, error);
}
static int slice_serialize(Unit *u, FILE *f, FDSet *fds) {
Slice *s = SLICE(u);
assert(s);
assert(f);
assert(fds);
unit_serialize_item(u, f, "state", slice_state_to_string(s->state));
return 0;
}
static int slice_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
Slice *s = SLICE(u);
assert(u);
assert(key);
assert(value);
assert(fds);
if (streq(key, "state")) {
SliceState state;
state = slice_state_from_string(value);
if (state < 0)
log_debug("Failed to parse state value %s", value);
else
s->deserialized_state = state;
} else
log_debug("Unknown serialization key '%s'", key);
return 0;
}
_pure_ static UnitActiveState slice_active_state(Unit *u) {
assert(u);
return state_translation_table[SLICE(u)->state];
}
_pure_ static const char *slice_sub_state_to_string(Unit *u) {
assert(u);
return slice_state_to_string(SLICE(u)->state);
}
static const char* const slice_state_table[_SLICE_STATE_MAX] = {
[SLICE_DEAD] = "dead",
[SLICE_ACTIVE] = "active"
};
DEFINE_STRING_TABLE_LOOKUP(slice_state, SliceState);
const UnitVTable slice_vtable = {
.object_size = sizeof(Slice),
.cgroup_context_offset = offsetof(Slice, cgroup_context),
.sections =
"Unit\0"
"Slice\0"
"Install\0",
.private_section = "Slice",
.no_alias = true,
.no_instances = true,
.load = slice_load,
.coldplug = slice_coldplug,
.dump = slice_dump,
.start = slice_start,
.stop = slice_stop,
.kill = slice_kill,
.serialize = slice_serialize,
.deserialize_item = slice_deserialize_item,
.active_state = slice_active_state,
.sub_state_to_string = slice_sub_state_to_string,
.bus_interface = "org.freedesktop.systemd1.Slice",
.bus_vtable = bus_slice_vtable,
.bus_set_property = bus_slice_set_property,
.bus_commit_properties = bus_slice_commit_properties,
.status_message_formats = {
.finished_start_job = {
[JOB_DONE] = "Created slice %s.",
[JOB_DEPENDENCY] = "Dependency failed for %s.",
},
.finished_stop_job = {
[JOB_DONE] = "Removed slice %s.",
},
},
};