+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2013 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <errno.h>
-
-#include "unit.h"
-#include "slice.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);
-
- /* Make sure slices are unloaded on shutdown */
- 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_unit_error(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;
-
- /* This is a new unit? Then let's add in some extras */
- 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, Hashmap *deferred_work) {
- 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);
-
- (void) unit_realize_cgroup(u);
- (void) unit_reset_cpu_usage(u);
-
- slice_set_state(t, SLICE_ACTIVE);
- return 1;
-}
-
-static int slice_stop(Unit *u) {
- Slice *t = SLICE(u);
-
- assert(t);
- assert(t->state == SLICE_ACTIVE);
-
- /* We do not need to destroy the cgroup explicitly,
- * unit_notify() will do that for us anyway. */
-
- slice_set_state(t, SLICE_DEAD);
- return 1;
-}
-
-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.",
- },
- },
-};
~ianmdlvl / elogind.git / blobdiff