]>
git.ipfire.org Git - thirdparty/systemd.git/blob - src/machine/machined.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2013 Lennart Poettering
7 systemd is free software; you can redistribute it and/or modify it
8 under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 2.1 of the License, or
10 (at your option) any later version.
12 systemd is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include "sd-daemon.h"
27 #include "alloc-util.h"
28 #include "bus-error.h"
30 #include "cgroup-util.h"
31 #include "dirent-util.h"
33 #include "format-util.h"
34 #include "hostname-util.h"
36 #include "machine-image.h"
38 #include "process-util.h"
39 #include "signal-util.h"
42 Manager
*manager_new(void) {
50 m
->machines
= hashmap_new(&string_hash_ops
);
51 m
->machine_units
= hashmap_new(&string_hash_ops
);
52 m
->machine_leaders
= hashmap_new(NULL
);
54 if (!m
->machines
|| !m
->machine_units
|| !m
->machine_leaders
) {
59 r
= sd_event_default(&m
->event
);
65 sd_event_set_watchdog(m
->event
, true);
70 void manager_free(Manager
*m
) {
76 operation_free(m
->operations
);
78 assert(m
->n_operations
== 0);
80 while ((machine
= hashmap_first(m
->machines
)))
81 machine_free(machine
);
83 hashmap_free(m
->machines
);
84 hashmap_free(m
->machine_units
);
85 hashmap_free(m
->machine_leaders
);
87 hashmap_free_with_destructor(m
->image_cache
, image_unref
);
89 sd_event_source_unref(m
->image_cache_defer_event
);
91 bus_verify_polkit_async_registry_free(m
->polkit_registry
);
94 sd_event_unref(m
->event
);
99 static int manager_add_host_machine(Manager
*m
) {
100 _cleanup_free_
char *rd
= NULL
, *unit
= NULL
;
108 r
= sd_id128_get_machine(&mid
);
110 return log_error_errno(r
, "Failed to get machine ID: %m");
116 unit
= strdup(SPECIAL_ROOT_SLICE
);
120 t
= machine_new(m
, MACHINE_HOST
, ".host");
127 t
->root_directory
= rd
;
131 dual_timestamp_from_boottime_or_monotonic(&t
->timestamp
, 0);
138 int manager_enumerate_machines(Manager
*m
) {
139 _cleanup_closedir_
DIR *d
= NULL
;
145 r
= manager_add_host_machine(m
);
149 /* Read in machine data stored on disk */
150 d
= opendir("/run/systemd/machines");
155 return log_error_errno(errno
, "Failed to open /run/systemd/machines: %m");
158 FOREACH_DIRENT(de
, d
, return -errno
) {
159 struct Machine
*machine
;
162 if (!dirent_is_file(de
))
165 /* Ignore symlinks that map the unit name to the machine */
166 if (startswith(de
->d_name
, "unit:"))
169 if (!machine_name_is_valid(de
->d_name
))
172 k
= manager_add_machine(m
, de
->d_name
, &machine
);
174 r
= log_error_errno(k
, "Failed to add machine by file name %s: %m", de
->d_name
);
178 machine_add_to_gc_queue(machine
);
180 k
= machine_load(machine
);
188 static int manager_connect_bus(Manager
*m
) {
194 r
= sd_bus_default_system(&m
->bus
);
196 return log_error_errno(r
, "Failed to connect to system bus: %m");
198 r
= sd_bus_add_object_vtable(m
->bus
, NULL
, "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", manager_vtable
, m
);
200 return log_error_errno(r
, "Failed to add manager object vtable: %m");
202 r
= sd_bus_add_fallback_vtable(m
->bus
, NULL
, "/org/freedesktop/machine1/machine", "org.freedesktop.machine1.Machine", machine_vtable
, machine_object_find
, m
);
204 return log_error_errno(r
, "Failed to add machine object vtable: %m");
206 r
= sd_bus_add_node_enumerator(m
->bus
, NULL
, "/org/freedesktop/machine1/machine", machine_node_enumerator
, m
);
208 return log_error_errno(r
, "Failed to add machine enumerator: %m");
210 r
= sd_bus_add_fallback_vtable(m
->bus
, NULL
, "/org/freedesktop/machine1/image", "org.freedesktop.machine1.Image", image_vtable
, image_object_find
, m
);
212 return log_error_errno(r
, "Failed to add image object vtable: %m");
214 r
= sd_bus_add_node_enumerator(m
->bus
, NULL
, "/org/freedesktop/machine1/image", image_node_enumerator
, m
);
216 return log_error_errno(r
, "Failed to add image enumerator: %m");
218 r
= sd_bus_match_signal_async(
221 "org.freedesktop.systemd1",
222 "/org/freedesktop/systemd1",
223 "org.freedesktop.systemd1.Manager",
225 match_job_removed
, NULL
, m
);
227 return log_error_errno(r
, "Failed to add match for JobRemoved: %m");
229 r
= sd_bus_match_signal_async(
232 "org.freedesktop.systemd1",
233 "/org/freedesktop/systemd1",
234 "org.freedesktop.systemd1.Manager",
236 match_unit_removed
, NULL
, m
);
238 return log_error_errno(r
, "Failed to request match for UnitRemoved: %m");
240 r
= sd_bus_match_signal_async(
243 "org.freedesktop.systemd1",
245 "org.freedesktop.DBus.Properties",
247 match_properties_changed
, NULL
, m
);
249 return log_error_errno(r
, "Failed to request match for PropertiesChanged: %m");
251 r
= sd_bus_match_signal_async(
254 "org.freedesktop.systemd1",
255 "/org/freedesktop/systemd1",
256 "org.freedesktop.systemd1.Manager",
258 match_reloading
, NULL
, m
);
260 return log_error_errno(r
, "Failed to request match for Reloading: %m");
262 r
= sd_bus_call_method_async(
265 "org.freedesktop.systemd1",
266 "/org/freedesktop/systemd1",
267 "org.freedesktop.systemd1.Manager",
272 return log_error_errno(r
, "Failed to enable subscription: %m");
274 r
= sd_bus_request_name_async(m
->bus
, NULL
, "org.freedesktop.machine1", 0, NULL
, NULL
);
276 return log_error_errno(r
, "Failed to request name: %m");
278 r
= sd_bus_attach_event(m
->bus
, m
->event
, 0);
280 return log_error_errno(r
, "Failed to attach bus to event loop: %m");
285 void manager_gc(Manager
*m
, bool drop_not_started
) {
290 while ((machine
= m
->machine_gc_queue
)) {
291 LIST_REMOVE(gc_queue
, m
->machine_gc_queue
, machine
);
292 machine
->in_gc_queue
= false;
294 /* First, if we are not closing yet, initiate stopping */
295 if (!machine_check_gc(machine
, drop_not_started
) &&
296 machine_get_state(machine
) != MACHINE_CLOSING
)
297 machine_stop(machine
);
299 /* Now, the stop probably made this referenced
300 * again, but if it didn't, then it's time to let it
302 if (!machine_check_gc(machine
, drop_not_started
)) {
303 machine_finalize(machine
);
304 machine_free(machine
);
309 int manager_startup(Manager
*m
) {
316 /* Connect to the bus */
317 r
= manager_connect_bus(m
);
321 /* Deserialize state */
322 manager_enumerate_machines(m
);
324 /* Remove stale objects before we start them */
325 manager_gc(m
, false);
327 /* And start everything */
328 HASHMAP_FOREACH(machine
, m
->machines
, i
)
329 machine_start(machine
, NULL
, NULL
);
334 static bool check_idle(void *userdata
) {
335 Manager
*m
= userdata
;
342 return hashmap_isempty(m
->machines
);
345 int manager_run(Manager
*m
) {
348 return bus_event_loop_with_idle(
351 "org.freedesktop.machine1",
356 int main(int argc
, char *argv
[]) {
360 log_set_target(LOG_TARGET_AUTO
);
361 log_set_facility(LOG_AUTH
);
362 log_parse_environment();
368 log_error("This program takes no arguments.");
373 /* Always create the directories people can create inotify
374 * watches in. Note that some applications might check for the
375 * existence of /run/systemd/machines/ to determine whether
376 * machined is available, so please always make sure this
378 mkdir_label("/run/systemd/machines", 0755);
380 assert_se(sigprocmask_many(SIG_BLOCK
, NULL
, SIGCHLD
, -1) >= 0);
388 r
= manager_startup(m
);
390 log_error_errno(r
, "Failed to fully start up daemon: %m");
394 log_debug("systemd-machined running as pid "PID_FMT
, getpid_cached());
398 "STATUS=Processing requests...");
402 log_debug("systemd-machined stopped as pid "PID_FMT
, getpid_cached());
407 return r
< 0 ? EXIT_FAILURE
: EXIT_SUCCESS
;