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, NULL, "/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, NULL, "/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, NULL, "/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,
165 "sender='org.freedesktop.systemd1',"
166 "interface='org.freedesktop.systemd1.Manager',"
167 "member='JobRemoved',"
168 "path='/org/freedesktop/systemd1'",
172 log_error("Failed to add match for JobRemoved: %s", strerror(-r));
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 log_error("Failed to add match for UnitRemoved: %s", strerror(-r));
190 r = sd_bus_add_match(m->bus,
193 "sender='org.freedesktop.systemd1',"
194 "interface='org.freedesktop.DBus.Properties',"
195 "member='PropertiesChanged'",
196 match_properties_changed,
199 log_error("Failed to add match for PropertiesChanged: %s", strerror(-r));
203 r = sd_bus_add_match(m->bus,
206 "sender='org.freedesktop.systemd1',"
207 "interface='org.freedesktop.systemd1.Manager',"
208 "member='Reloading',"
209 "path='/org/freedesktop/systemd1'",
213 log_error("Failed to add match for Reloading: %s", strerror(-r));
217 r = sd_bus_call_method(
219 "org.freedesktop.systemd1",
220 "/org/freedesktop/systemd1",
221 "org.freedesktop.systemd1.Manager",
226 log_error("Failed to enable subscription: %s", bus_error_message(&error, r));
230 r = sd_bus_request_name(m->bus, "org.freedesktop.machine1", 0);
232 log_error("Failed to register name: %s", strerror(-r));
236 r = sd_bus_attach_event(m->bus, m->event, 0);
238 log_error("Failed to attach bus to event loop: %s", strerror(-r));
245 void manager_gc(Manager *m, bool drop_not_started) {
250 while ((machine = m->machine_gc_queue)) {
251 LIST_REMOVE(gc_queue, m->machine_gc_queue, machine);
252 machine->in_gc_queue = false;
254 if (!machine_check_gc(machine, drop_not_started)) {
255 machine_stop(machine);
256 machine_free(machine);
261 int manager_startup(Manager *m) {
268 /* Connect to the bus */
269 r = manager_connect_bus(m);
273 /* Deserialize state */
274 manager_enumerate_machines(m);
276 /* Remove stale objects before we start them */
277 manager_gc(m, false);
279 /* And start everything */
280 HASHMAP_FOREACH(machine, m->machines, i)
281 machine_start(machine, NULL, NULL);
286 static bool check_idle(void *userdata) {
287 Manager *m = userdata;
291 return hashmap_isempty(m->machines);
294 int manager_run(Manager *m) {
297 return bus_event_loop_with_idle(
300 "org.freedesktop.machine1",
305 int main(int argc, char *argv[]) {
309 log_set_target(LOG_TARGET_AUTO);
310 log_set_facility(LOG_AUTH);
311 log_parse_environment();
317 log_error("This program takes no arguments.");
322 /* Always create the directories people can create inotify
323 * watches in. Note that some applications might check for the
324 * existence of /run/systemd/machines/ to determine whether
325 * machined is available, so please always make sure this
327 mkdir_label("/run/systemd/machines", 0755);
335 r = manager_startup(m);
337 log_error("Failed to fully start up daemon: %s", strerror(-r));
341 log_debug("systemd-machined running as pid "PID_FMT, getpid());
345 "STATUS=Processing requests...");
349 log_debug("systemd-machined stopped as pid "PID_FMT, getpid());
353 "STATUS=Shutting down...");
358 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;