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"
31 #include "conf-parser.h"
32 #include "cgroup-util.h"
35 #include "bus-error.h"
39 Manager *manager_new(void) {
47 m->machines = hashmap_new(&string_hash_ops);
48 m->machine_units = hashmap_new(&string_hash_ops);
49 m->machine_leaders = hashmap_new(NULL);
51 if (!m->machines || !m->machine_units || !m->machine_leaders) {
56 r = sd_event_default(&m->event);
62 sd_event_set_watchdog(m->event, true);
67 void manager_free(Manager *m) {
72 while ((machine = hashmap_first(m->machines)))
73 machine_free(machine);
75 hashmap_free(m->machines);
76 hashmap_free(m->machine_units);
77 hashmap_free(m->machine_leaders);
79 bus_verify_polkit_async_registry_free(m->polkit_registry);
82 sd_event_unref(m->event);
87 int manager_enumerate_machines(Manager *m) {
88 _cleanup_closedir_ DIR *d = NULL;
94 /* Read in machine data stored on disk */
95 d = opendir("/run/systemd/machines");
100 log_error_errno(errno, "Failed to open /run/systemd/machines: %m");
104 FOREACH_DIRENT(de, d, return -errno) {
105 struct Machine *machine;
108 if (!dirent_is_file(de))
111 /* Ignore symlinks that map the unit name to the machine */
112 if (startswith(de->d_name, "unit:"))
115 k = manager_add_machine(m, de->d_name, &machine);
117 log_error_errno(k, "Failed to add machine by file name %s: %m", de->d_name);
123 machine_add_to_gc_queue(machine);
125 k = machine_load(machine);
133 static int manager_connect_bus(Manager *m) {
134 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
140 r = sd_bus_default_system(&m->bus);
142 return log_error_errno(r, "Failed to connect to system bus: %m");
144 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", manager_vtable, m);
146 return log_error_errno(r, "Failed to add manager object vtable: %m");
148 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/machine1/machine", "org.freedesktop.machine1.Machine", machine_vtable, machine_object_find, m);
150 return log_error_errno(r, "Failed to add machine object vtable: %m");
152 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/machine1/machine", machine_node_enumerator, m);
154 return log_error_errno(r, "Failed to add machine enumerator: %m");
156 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/machine1/image", "org.freedesktop.machine1.Image", image_vtable, image_object_find, m);
158 return log_error_errno(r, "Failed to add image object vtable: %m");
160 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/machine1/image", image_node_enumerator, m);
162 return log_error_errno(r, "Failed to add image enumerator: %m");
164 r = sd_bus_add_match(m->bus,
167 "sender='org.freedesktop.systemd1',"
168 "interface='org.freedesktop.systemd1.Manager',"
169 "member='JobRemoved',"
170 "path='/org/freedesktop/systemd1'",
174 return log_error_errno(r, "Failed to add match for JobRemoved: %m");
176 r = sd_bus_add_match(m->bus,
179 "sender='org.freedesktop.systemd1',"
180 "interface='org.freedesktop.systemd1.Manager',"
181 "member='UnitRemoved',"
182 "path='/org/freedesktop/systemd1'",
186 return log_error_errno(r, "Failed to add match for UnitRemoved: %m");
188 r = sd_bus_add_match(m->bus,
191 "sender='org.freedesktop.systemd1',"
192 "interface='org.freedesktop.DBus.Properties',"
193 "member='PropertiesChanged'",
194 match_properties_changed,
197 return log_error_errno(r, "Failed to add match for PropertiesChanged: %m");
199 r = sd_bus_add_match(m->bus,
202 "sender='org.freedesktop.systemd1',"
203 "interface='org.freedesktop.systemd1.Manager',"
204 "member='Reloading',"
205 "path='/org/freedesktop/systemd1'",
209 return log_error_errno(r, "Failed to add match for Reloading: %m");
211 r = sd_bus_call_method(
213 "org.freedesktop.systemd1",
214 "/org/freedesktop/systemd1",
215 "org.freedesktop.systemd1.Manager",
220 log_error("Failed to enable subscription: %s", bus_error_message(&error, r));
224 r = sd_bus_request_name(m->bus, "org.freedesktop.machine1", 0);
226 return log_error_errno(r, "Failed to register name: %m");
228 r = sd_bus_attach_event(m->bus, m->event, 0);
230 return log_error_errno(r, "Failed to attach bus to event loop: %m");
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 static bool check_idle(void *userdata) {
277 Manager *m = userdata;
281 return hashmap_isempty(m->machines);
284 int manager_run(Manager *m) {
287 return bus_event_loop_with_idle(
290 "org.freedesktop.machine1",
295 int main(int argc, char *argv[]) {
299 log_set_target(LOG_TARGET_AUTO);
300 log_set_facility(LOG_AUTH);
301 log_parse_environment();
307 log_error("This program takes no arguments.");
312 /* Always create the directories people can create inotify
313 * watches in. Note that some applications might check for the
314 * existence of /run/systemd/machines/ to determine whether
315 * machined is available, so please always make sure this
317 mkdir_label("/run/systemd/machines", 0755);
325 r = manager_startup(m);
327 log_error_errno(r, "Failed to fully start up daemon: %m");
331 log_debug("systemd-machined running as pid "PID_FMT, getpid());
335 "STATUS=Processing requests...");
339 log_debug("systemd-machined stopped as pid "PID_FMT, getpid());
345 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;