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);
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);
80 sd_event_unref(m->event);
85 int manager_enumerate_machines(Manager *m) {
86 _cleanup_closedir_ DIR *d = NULL;
92 /* Read in machine data stored on disk */
93 d = opendir("/run/systemd/machines");
98 log_error("Failed to open /run/systemd/machines: %m");
102 FOREACH_DIRENT(de, d, return -errno) {
103 struct Machine *machine;
106 if (!dirent_is_file(de))
109 /* Ignore symlinks that map the unit name to the machine */
110 if (startswith(de->d_name, "unit:"))
113 k = manager_add_machine(m, de->d_name, &machine);
115 log_error("Failed to add machine by file name %s: %s", de->d_name, strerror(-k));
121 machine_add_to_gc_queue(machine);
123 k = machine_load(machine);
131 static int manager_connect_bus(Manager *m) {
132 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
138 r = sd_bus_default_system(&m->bus);
140 log_error("Failed to connect to system bus: %s", strerror(-r));
144 r = sd_bus_add_object_vtable(m->bus, "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", manager_vtable, m);
146 log_error("Failed to add manager object vtable: %s", strerror(-r));
150 r = sd_bus_add_fallback_vtable(m->bus, "/org/freedesktop/machine1/machine", "org.freedesktop.machine1.Machine", machine_vtable, machine_object_find, m);
152 log_error("Failed to add machine object vtable: %s", strerror(-r));
156 r = sd_bus_add_node_enumerator(m->bus, "/org/freedesktop/machine1/machine", machine_node_enumerator, m);
158 log_error("Failed to add machine enumerator: %s", strerror(-r));
162 r = sd_bus_add_match(m->bus,
164 "sender='org.freedesktop.systemd1',"
165 "interface='org.freedesktop.systemd1.Manager',"
166 "member='JobRemoved',"
167 "path='/org/freedesktop/systemd1'",
171 log_error("Failed to add match for JobRemoved: %s", strerror(-r));
175 r = sd_bus_add_match(m->bus,
177 "sender='org.freedesktop.systemd1',"
178 "interface='org.freedesktop.systemd1.Manager',"
179 "member='UnitRemoved',"
180 "path='/org/freedesktop/systemd1'",
184 log_error("Failed to add match for UnitRemoved: %s", strerror(-r));
188 r = sd_bus_add_match(m->bus,
190 "sender='org.freedesktop.systemd1',"
191 "interface='org.freedesktop.DBus.Properties',"
192 "member='PropertiesChanged'",
193 match_properties_changed,
196 log_error("Failed to add match for PropertiesChanged: %s", strerror(-r));
200 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 log_error("Failed to add match for Reloading: %s", strerror(-r));
213 r = sd_bus_call_method(
215 "org.freedesktop.systemd1",
216 "/org/freedesktop/systemd1",
217 "org.freedesktop.systemd1.Manager",
222 log_error("Failed to enable subscription: %s", bus_error_message(&error, r));
226 r = sd_bus_request_name(m->bus, "org.freedesktop.machine1", 0);
228 log_error("Failed to register name: %s", strerror(-r));
232 r = sd_bus_attach_event(m->bus, m->event, 0);
234 log_error("Failed to attach bus to event loop: %s", strerror(-r));
241 void manager_gc(Manager *m, bool drop_not_started) {
246 while ((machine = m->machine_gc_queue)) {
247 LIST_REMOVE(gc_queue, m->machine_gc_queue, machine);
248 machine->in_gc_queue = false;
250 if (!machine_check_gc(machine, drop_not_started)) {
251 machine_stop(machine);
252 machine_free(machine);
257 int manager_startup(Manager *m) {
264 /* Connect to the bus */
265 r = manager_connect_bus(m);
269 /* Deserialize state */
270 manager_enumerate_machines(m);
272 /* Remove stale objects before we start them */
273 manager_gc(m, false);
275 /* And start everything */
276 HASHMAP_FOREACH(machine, m->machines, i)
277 machine_start(machine, NULL, NULL);
282 static bool check_idle(void *userdata) {
283 Manager *m = userdata;
287 return hashmap_isempty(m->machines);
290 int manager_run(Manager *m) {
293 return bus_event_loop_with_idle(
296 "org.freedesktop.machine1",
301 int main(int argc, char *argv[]) {
305 log_set_target(LOG_TARGET_AUTO);
306 log_set_facility(LOG_AUTH);
307 log_parse_environment();
313 log_error("This program takes no arguments.");
318 /* Always create the directories people can create inotify
319 * watches in. Note that some applications might check for the
320 * existence of /run/systemd/machines/ to determine whether
321 * machined is available, so please always make sure this
323 mkdir_label("/run/systemd/machines", 0755);
331 r = manager_startup(m);
333 log_error("Failed to fully start up daemon: %s", strerror(-r));
337 log_debug("systemd-machined running as pid %lu", (unsigned long) getpid());
341 "STATUS=Processing requests...");
345 log_debug("systemd-machined stopped as pid %lu", (unsigned long) getpid());
349 "STATUS=Shutting down...");
354 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;