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/>.
27 #include <sys/epoll.h>
29 #include "sd-daemon.h"
32 #include "conf-parser.h"
33 #include "cgroup-util.h"
36 #include "bus-error.h"
39 Manager *manager_new(void) {
47 m->machines = hashmap_new(string_hash_func, string_compare_func);
48 m->machine_units = hashmap_new(string_hash_func, string_compare_func);
49 m->machine_leaders = hashmap_new(trivial_hash_func, trivial_compare_func);
51 if (!m->machines || !m->machine_units || !m->machine_leaders) {
56 r = sd_event_default(&m->event);
65 void manager_free(Manager *m) {
70 while ((machine = hashmap_first(m->machines)))
71 machine_free(machine);
73 hashmap_free(m->machines);
74 hashmap_free(m->machine_units);
75 hashmap_free(m->machine_leaders);
78 sd_event_unref(m->event);
83 int manager_enumerate_machines(Manager *m) {
84 _cleanup_closedir_ DIR *d = NULL;
90 /* Read in machine data stored on disk */
91 d = opendir("/run/systemd/machines");
96 log_error("Failed to open /run/systemd/machines: %m");
100 FOREACH_DIRENT(de, d, return -errno) {
101 struct Machine *machine;
104 if (!dirent_is_file(de))
107 k = manager_add_machine(m, de->d_name, &machine);
109 log_error("Failed to add machine by file name %s: %s", de->d_name, strerror(-k));
115 machine_add_to_gc_queue(machine);
117 k = machine_load(machine);
125 static int manager_connect_bus(Manager *m) {
126 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
132 r = sd_bus_default_system(&m->bus);
134 log_error("Failed to connect to system bus: %s", strerror(-r));
138 r = sd_bus_add_object_vtable(m->bus, "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", manager_vtable, m);
140 log_error("Failed to add manager object vtable: %s", strerror(-r));
144 r = sd_bus_add_fallback_vtable(m->bus, "/org/freedesktop/machine1/machine", "org.freedesktop.machine1.Machine", machine_vtable, machine_object_find, m);
146 log_error("Failed to add machine object vtable: %s", strerror(-r));
150 r = sd_bus_add_node_enumerator(m->bus, "/org/freedesktop/machine1/machine", machine_node_enumerator, m);
152 log_error("Failed to add machine enumerator: %s", strerror(-r));
156 r = sd_bus_add_match(m->bus,
158 "sender='org.freedesktop.systemd1',"
159 "interface='org.freedesktop.systemd1.Manager',"
160 "member='JobRemoved',"
161 "path='/org/freedesktop/systemd1'",
165 log_error("Failed to add match for JobRemoved: %s", strerror(-r));
169 r = sd_bus_add_match(m->bus,
171 "sender='org.freedesktop.systemd1',"
172 "interface='org.freedesktop.systemd1.Manager',"
173 "member='UnitRemoved',"
174 "path='/org/freedesktop/systemd1'",
178 log_error("Failed to add match for UnitRemoved: %s", strerror(-r));
182 r = sd_bus_add_match(m->bus,
184 "sender='org.freedesktop.systemd1',"
185 "interface='org.freedesktop.DBus.Properties',"
186 "member='PropertiesChanged'",
187 match_properties_changed,
190 log_error("Failed to add match for PropertiesChanged: %s", strerror(-r));
194 r = sd_bus_add_match(m->bus,
196 "sender='org.freedesktop.systemd1',"
197 "interface='org.freedesktop.systemd1.Manager',"
198 "member='Reloading',"
199 "path='/org/freedesktop/systemd1'",
203 log_error("Failed to add match for Reloading: %s", strerror(-r));
207 r = sd_bus_call_method(
209 "org.freedesktop.systemd1",
210 "/org/freedesktop/systemd1",
211 "org.freedesktop.systemd1.Manager",
216 log_error("Failed to enable subscription: %s", bus_error_message(&error, r));
220 r = sd_bus_request_name(m->bus, "org.freedesktop.machine1", SD_BUS_NAME_REPLACE_EXISTING|SD_BUS_NAME_DO_NOT_QUEUE);
222 log_error("Failed to register name: %s", strerror(-r));
226 r = sd_bus_attach_event(m->bus, m->event, 0);
228 log_error("Failed to attach bus to event loop: %s", strerror(-r));
235 void manager_gc(Manager *m, bool drop_not_started) {
240 while ((machine = m->machine_gc_queue)) {
241 LIST_REMOVE(gc_queue, m->machine_gc_queue, machine);
242 machine->in_gc_queue = false;
244 if (!machine_check_gc(machine, drop_not_started)) {
245 machine_stop(machine);
246 machine_free(machine);
251 int manager_startup(Manager *m) {
258 /* Connect to the bus */
259 r = manager_connect_bus(m);
263 /* Deserialize state */
264 manager_enumerate_machines(m);
266 /* Remove stale objects before we start them */
267 manager_gc(m, false);
269 /* And start everything */
270 HASHMAP_FOREACH(machine, m->machines, i)
271 machine_start(machine, NULL, NULL);
276 int manager_run(Manager *m) {
282 r = sd_event_get_state(m->event);
285 if (r == SD_EVENT_FINISHED)
290 r = sd_event_run(m->event, (uint64_t) -1);
298 int main(int argc, char *argv[]) {
302 log_set_target(LOG_TARGET_AUTO);
303 log_set_facility(LOG_AUTH);
304 log_parse_environment();
310 log_error("This program takes no arguments.");
315 /* Always create the directories people can create inotify
316 * watches in. Note that some applications might check for the
317 * existence of /run/systemd/machines/ to determine whether
318 * machined is available, so please always make sure this
320 mkdir_label("/run/systemd/machines", 0755);
328 r = manager_startup(m);
330 log_error("Failed to fully start up daemon: %s", strerror(-r));
334 log_debug("systemd-machined running as pid %lu", (unsigned long) getpid());
338 "STATUS=Processing requests...");
342 log_debug("systemd-machined stopped as pid %lu", (unsigned long) getpid());
346 "STATUS=Shutting down...");
351 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;