[SNAPSHOT_ACTIVE] = UNIT_ACTIVE
};
-static const char* const state_string_table[_SNAPSHOT_STATE_MAX] = {
- [SNAPSHOT_DEAD] = "dead",
- [SNAPSHOT_ACTIVE] = "active"
-};
-
-static int snapshot_load(Unit *u) {
- Iterator i;
- Unit *other;
- int r;
+static void snapshot_set_state(Snapshot *s, SnapshotState state) {
+ SnapshotState old_state;
+ assert(s);
- assert(u);
+ old_state = s->state;
+ s->state = state;
- HASHMAP_FOREACH(other, u->meta.manager->units, i) {
+ if (state != old_state)
+ log_debug("%s changed %s -> %s",
+ UNIT(s)->meta.id,
+ snapshot_state_to_string(old_state),
+ snapshot_state_to_string(state));
- if (UNIT_VTABLE(other)->no_snapshots)
- continue;
+ unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
+}
- if ((r = unit_add_dependency(u, UNIT_REQUIRES, other)) < 0)
- return r;
+static int snapshot_coldplug(Unit *u) {
+ Snapshot *s = SNAPSHOT(u);
- if ((r = unit_add_dependency(u, UNIT_AFTER, other)) < 0)
- return r;
- }
+ assert(s);
+ assert(s->state == SNAPSHOT_DEAD);
- u->meta.load_state = UNIT_LOADED;
+ if (s->deserialized_state != s->state)
+ snapshot_set_state(s, s->deserialized_state);
return 0;
}
fprintf(f,
"%sSnapshot State: %s\n"
"%sClean Up: %s\n",
- prefix, state_string_table[s->state],
+ prefix, snapshot_state_to_string(s->state),
prefix, yes_no(s->cleanup));
}
-static void snapshot_set_state(Snapshot *s, SnapshotState state) {
- SnapshotState old_state;
- assert(s);
-
- old_state = s->state;
- s->state = state;
-
- if (state != old_state)
- log_debug("%s changed %s → %s", UNIT(s)->meta.id, state_string_table[old_state], state_string_table[state]);
-
- unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
-}
-
static int snapshot_start(Unit *u) {
Snapshot *s = SNAPSHOT(u);
return 0;
}
+static int snapshot_serialize(Unit *u, FILE *f, FDSet *fds) {
+ Snapshot *s = SNAPSHOT(u);
+ Unit *other;
+ Iterator i;
+
+ assert(s);
+ assert(f);
+ assert(fds);
+
+ unit_serialize_item(u, f, "state", snapshot_state_to_string(s->state));
+ unit_serialize_item(u, f, "cleanup", yes_no(s->cleanup));
+ SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i)
+ unit_serialize_item(u, f, "requires", other->meta.id);
+
+ return 0;
+}
+
+static int snapshot_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
+ Snapshot *s = SNAPSHOT(u);
+ int r;
+
+ assert(u);
+ assert(key);
+ assert(value);
+ assert(fds);
+
+ if (streq(key, "state")) {
+ SnapshotState state;
+
+ if ((state = snapshot_state_from_string(value)) < 0)
+ log_debug("Failed to parse state value %s", value);
+ else
+ s->deserialized_state = state;
+
+ } else if (streq(key, "cleanup")) {
+
+ if ((r = parse_boolean(value)) < 0)
+ log_debug("Failed to parse cleanup value %s", value);
+ else
+ s->cleanup = r;
+
+ } else if (streq(key, "requires")) {
+
+ if ((r = unit_add_dependency_by_name(u, UNIT_AFTER, value, NULL, true)) < 0)
+ return r;
+
+ if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, value, NULL, true)) < 0)
+ return r;
+ } else
+ log_debug("Unknown serialization key '%s'", key);
+
+ return 0;
+}
+
static UnitActiveState snapshot_active_state(Unit *u) {
assert(u);
static const char *snapshot_sub_state_to_string(Unit *u) {
assert(u);
- return state_string_table[SNAPSHOT(u)->state];
+ return snapshot_state_to_string(SNAPSHOT(u)->state);
}
int snapshot_create(Manager *m, const char *name, bool cleanup, Snapshot **_s) {
- Unit *u;
+ Iterator i;
+ Unit *other, *u = NULL;
char *n = NULL;
int r;
+ const char *k;
assert(m);
assert(_s);
free(n);
if (r < 0)
- return r;
+ goto fail;
+
+ HASHMAP_FOREACH_KEY(other, k, m->units, i) {
+
+ if (UNIT_VTABLE(other)->no_snapshots)
+ continue;
+
+ if (k != other->meta.id)
+ continue;
+
+ if (UNIT_VTABLE(other)->check_snapshot)
+ if (!UNIT_VTABLE(other)->check_snapshot(other))
+ continue;
+
+ if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
+ continue;
+
+ if ((r = unit_add_dependency(u, UNIT_REQUIRES, other, true)) < 0)
+ goto fail;
+
+ if ((r = unit_add_dependency(u, UNIT_AFTER, other, true)) < 0)
+ goto fail;
+ }
SNAPSHOT(u)->cleanup = cleanup;
*_s = SNAPSHOT(u);
return 0;
+
+fail:
+ if (u)
+ unit_add_to_cleanup_queue(u);
+
+ return r;
}
void snapshot_remove(Snapshot *s) {
unit_add_to_cleanup_queue(UNIT(s));
}
+static const char* const snapshot_state_table[_SNAPSHOT_STATE_MAX] = {
+ [SNAPSHOT_DEAD] = "dead",
+ [SNAPSHOT_ACTIVE] = "active"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(snapshot_state, SnapshotState);
+
const UnitVTable snapshot_vtable = {
.suffix = ".snapshot",
.no_alias = true,
.no_instances = true,
.no_snapshots = true,
+ .no_gc = true,
- .load = snapshot_load,
+ .load = unit_load_nop,
+ .coldplug = snapshot_coldplug,
.dump = snapshot_dump,
.start = snapshot_start,
.stop = snapshot_stop,
+ .serialize = snapshot_serialize,
+ .deserialize_item = snapshot_deserialize_item,
+
.active_state = snapshot_active_state,
.sub_state_to_string = snapshot_sub_state_to_string,
~ianmdlvl / elogind.git / blobdiff