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"
40 Manager *manager_new(void) {
48 m->machines = hashmap_new(&string_hash_ops);
49 m->machine_units = hashmap_new(&string_hash_ops);
50 m->machine_leaders = hashmap_new(NULL);
52 if (!m->machines || !m->machine_units || !m->machine_leaders) {
57 r = sd_event_default(&m->event);
63 sd_event_set_watchdog(m->event, true);
68 void manager_free(Manager *m) {
73 while ((machine = hashmap_first(m->machines)))
74 machine_free(machine);
76 hashmap_free(m->machines);
77 hashmap_free(m->machine_units);
78 hashmap_free(m->machine_leaders);
81 sd_event_unref(m->event);
86 int manager_enumerate_machines(Manager *m) {
87 _cleanup_closedir_ DIR *d = NULL;
93 /* Read in machine data stored on disk */
94 d = opendir("/run/systemd/machines");
99 log_error("Failed to open /run/systemd/machines: %m");
103 FOREACH_DIRENT(de, d, return -errno) {
104 struct Machine *machine;
107 if (!dirent_is_file(de))
110 /* Ignore symlinks that map the unit name to the machine */
111 if (startswith(de->d_name, "unit:"))
114 k = manager_add_machine(m, de->d_name, &machine);
116 log_error_errno(k, "Failed to add machine by file name %s: %m", de->d_name);
122 machine_add_to_gc_queue(machine);
124 k = machine_load(machine);
132 static int manager_connect_bus(Manager *m) {
133 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
139 r = sd_bus_default_system(&m->bus);
141 log_error_errno(r, "Failed to connect to system bus: %m");
145 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", manager_vtable, m);
147 log_error_errno(r, "Failed to add manager object vtable: %m");
151 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/machine1/machine", "org.freedesktop.machine1.Machine", machine_vtable, machine_object_find, m);
153 log_error_errno(r, "Failed to add machine object vtable: %m");
157 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/machine1/machine", machine_node_enumerator, m);
159 log_error_errno(r, "Failed to add machine enumerator: %m");
163 r = sd_bus_add_match(m->bus,
166 "sender='org.freedesktop.systemd1',"
167 "interface='org.freedesktop.systemd1.Manager',"
168 "member='JobRemoved',"
169 "path='/org/freedesktop/systemd1'",
173 log_error_errno(r, "Failed to add match for JobRemoved: %m");
177 r = sd_bus_add_match(m->bus,
180 "sender='org.freedesktop.systemd1',"
181 "interface='org.freedesktop.systemd1.Manager',"
182 "member='UnitRemoved',"
183 "path='/org/freedesktop/systemd1'",
187 log_error_errno(r, "Failed to add match for UnitRemoved: %m");
191 r = sd_bus_add_match(m->bus,
194 "sender='org.freedesktop.systemd1',"
195 "interface='org.freedesktop.DBus.Properties',"
196 "member='PropertiesChanged'",
197 match_properties_changed,
200 log_error_errno(r, "Failed to add match for PropertiesChanged: %m");
204 r = sd_bus_add_match(m->bus,
207 "sender='org.freedesktop.systemd1',"
208 "interface='org.freedesktop.systemd1.Manager',"
209 "member='Reloading',"
210 "path='/org/freedesktop/systemd1'",
214 log_error_errno(r, "Failed to add match for Reloading: %m");
218 r = sd_bus_call_method(
220 "org.freedesktop.systemd1",
221 "/org/freedesktop/systemd1",
222 "org.freedesktop.systemd1.Manager",
227 log_error("Failed to enable subscription: %s", bus_error_message(&error, r));
231 r = sd_bus_request_name(m->bus, "org.freedesktop.machine1", 0);
233 log_error_errno(r, "Failed to register name: %m");
237 r = sd_bus_attach_event(m->bus, m->event, 0);
239 log_error_errno(r, "Failed to attach bus to event loop: %m");
246 void manager_gc(Manager *m, bool drop_not_started) {
251 while ((machine = m->machine_gc_queue)) {
252 LIST_REMOVE(gc_queue, m->machine_gc_queue, machine);
253 machine->in_gc_queue = false;
255 if (!machine_check_gc(machine, drop_not_started)) {
256 machine_stop(machine);
257 machine_free(machine);
262 int manager_startup(Manager *m) {
269 /* Connect to the bus */
270 r = manager_connect_bus(m);
274 /* Deserialize state */
275 manager_enumerate_machines(m);
277 /* Remove stale objects before we start them */
278 manager_gc(m, false);
280 /* And start everything */
281 HASHMAP_FOREACH(machine, m->machines, i)
282 machine_start(machine, NULL, NULL);
287 static bool check_idle(void *userdata) {
288 Manager *m = userdata;
292 return hashmap_isempty(m->machines);
295 int manager_run(Manager *m) {
298 return bus_event_loop_with_idle(
301 "org.freedesktop.machine1",
306 int main(int argc, char *argv[]) {
310 log_set_target(LOG_TARGET_AUTO);
311 log_set_facility(LOG_AUTH);
312 log_parse_environment();
318 log_error("This program takes no arguments.");
323 /* Always create the directories people can create inotify
324 * watches in. Note that some applications might check for the
325 * existence of /run/systemd/machines/ to determine whether
326 * machined is available, so please always make sure this
328 mkdir_label("/run/systemd/machines", 0755);
336 r = manager_startup(m);
338 log_error_errno(r, "Failed to fully start up daemon: %m");
342 log_debug("systemd-machined running as pid "PID_FMT, getpid());
346 "STATUS=Processing requests...");
350 log_debug("systemd-machined stopped as pid "PID_FMT, getpid());
356 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;