+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8 -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 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
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <errno.h>
-
-#include "unit.h"
-#include "snapshot.h"
-#include "unit-name.h"
-#include "dbus-snapshot.h"
-
-static const UnitActiveState state_translation_table[_SNAPSHOT_STATE_MAX] = {
- [SNAPSHOT_DEAD] = UNIT_INACTIVE,
- [SNAPSHOT_ACTIVE] = UNIT_ACTIVE
-};
-
-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,
- snapshot_state_to_string(old_state),
- snapshot_state_to_string(state));
-
- unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
-}
-
-static int snapshot_coldplug(Unit *u) {
- Snapshot *s = SNAPSHOT(u);
-
- assert(s);
- assert(s->state == SNAPSHOT_DEAD);
-
- if (s->deserialized_state != s->state)
- snapshot_set_state(s, s->deserialized_state);
-
- return 0;
-}
-
-static void snapshot_dump(Unit *u, FILE *f, const char *prefix) {
- Snapshot *s = SNAPSHOT(u);
-
- assert(s);
- assert(f);
-
- fprintf(f,
- "%sSnapshot State: %s\n"
- "%sClean Up: %s\n",
- prefix, snapshot_state_to_string(s->state),
- prefix, yes_no(s->cleanup));
-}
-
-static int snapshot_start(Unit *u) {
- Snapshot *s = SNAPSHOT(u);
-
- assert(s);
- assert(s->state == SNAPSHOT_DEAD);
-
- snapshot_set_state(s, SNAPSHOT_ACTIVE);
-
- if (s->cleanup)
- unit_add_to_cleanup_queue(u);
-
- return 0;
-}
-
-static int snapshot_stop(Unit *u) {
- Snapshot *s = SNAPSHOT(u);
-
- assert(s);
- assert(s->state == SNAPSHOT_ACTIVE);
-
- snapshot_set_state(s, SNAPSHOT_DEAD);
- 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);
-
- return state_translation_table[SNAPSHOT(u)->state];
-}
-
-static const char *snapshot_sub_state_to_string(Unit *u) {
- assert(u);
-
- return snapshot_state_to_string(SNAPSHOT(u)->state);
-}
-
-int snapshot_create(Manager *m, const char *name, bool cleanup, Snapshot **_s) {
- Iterator i;
- Unit *other, *u = NULL;
- char *n = NULL;
- int r;
- const char *k;
-
- assert(m);
- assert(_s);
-
- if (name) {
- if (!unit_name_is_valid(name))
- return -EINVAL;
-
- if (unit_name_to_type(name) != UNIT_SNAPSHOT)
- return -EINVAL;
-
- if (manager_get_unit(m, name))
- return -EEXIST;
-
- } else {
-
- for (;;) {
- if (asprintf(&n, "snapshot-%u.snapshot", ++ m->n_snapshots) < 0)
- return -ENOMEM;
-
- if (!manager_get_unit(m, n))
- break;
-
- free(n);
- }
-
- name = n;
- }
-
- r = manager_load_unit(m, name, NULL, &u);
- free(n);
-
- if (r < 0)
- 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) {
- assert(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 = 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,
-
- .bus_message_handler = bus_snapshot_message_handler
-};
~ianmdlvl / elogind.git / blobdiff