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Diffstat (limited to 'src/grp-machine/systemd-machined/machined.c')
-rw-r--r--src/grp-machine/systemd-machined/machined.c415
1 files changed, 415 insertions, 0 deletions
diff --git a/src/grp-machine/systemd-machined/machined.c b/src/grp-machine/systemd-machined/machined.c
new file mode 100644
index 0000000000..d6ce7e0c26
--- /dev/null
+++ b/src/grp-machine/systemd-machined/machined.c
@@ -0,0 +1,415 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <systemd/sd-daemon.h>
+
+#include "machine-core/machined.h"
+#include "sd-bus/bus-error.h"
+#include "sd-bus/bus-util.h"
+#include "systemd-basic/alloc-util.h"
+#include "systemd-basic/cgroup-util.h"
+#include "systemd-basic/dirent-util.h"
+#include "systemd-basic/fd-util.h"
+#include "systemd-basic/formats-util.h"
+#include "systemd-basic/hostname-util.h"
+#include "systemd-basic/label.h"
+#include "systemd-basic/signal-util.h"
+#include "systemd-shared/machine-image.h"
+
+Manager *manager_new(void) {
+ Manager *m;
+ int r;
+
+ m = new0(Manager, 1);
+ if (!m)
+ return NULL;
+
+ m->machines = hashmap_new(&string_hash_ops);
+ m->machine_units = hashmap_new(&string_hash_ops);
+ m->machine_leaders = hashmap_new(NULL);
+
+ if (!m->machines || !m->machine_units || !m->machine_leaders) {
+ manager_free(m);
+ return NULL;
+ }
+
+ r = sd_event_default(&m->event);
+ if (r < 0) {
+ manager_free(m);
+ return NULL;
+ }
+
+ sd_event_set_watchdog(m->event, true);
+
+ return m;
+}
+
+void manager_free(Manager *m) {
+ Machine *machine;
+ Image *i;
+
+ assert(m);
+
+ while (m->operations)
+ operation_free(m->operations);
+
+ assert(m->n_operations == 0);
+
+ while ((machine = hashmap_first(m->machines)))
+ machine_free(machine);
+
+ hashmap_free(m->machines);
+ hashmap_free(m->machine_units);
+ hashmap_free(m->machine_leaders);
+
+ while ((i = hashmap_steal_first(m->image_cache)))
+ image_unref(i);
+
+ hashmap_free(m->image_cache);
+
+ sd_event_source_unref(m->image_cache_defer_event);
+
+ bus_verify_polkit_async_registry_free(m->polkit_registry);
+
+ sd_bus_unref(m->bus);
+ sd_event_unref(m->event);
+
+ free(m);
+}
+
+static int manager_add_host_machine(Manager *m) {
+ _cleanup_free_ char *rd = NULL, *unit = NULL;
+ sd_id128_t mid;
+ Machine *t;
+ int r;
+
+ if (m->host_machine)
+ return 0;
+
+ r = sd_id128_get_machine(&mid);
+ if (r < 0)
+ return log_error_errno(r, "Failed to get machine ID: %m");
+
+ rd = strdup("/");
+ if (!rd)
+ return log_oom();
+
+ unit = strdup("-.slice");
+ if (!unit)
+ return log_oom();
+
+ t = machine_new(m, MACHINE_HOST, ".host");
+ if (!t)
+ return log_oom();
+
+ t->leader = 1;
+ t->id = mid;
+
+ t->root_directory = rd;
+ t->unit = unit;
+ rd = unit = NULL;
+
+ dual_timestamp_from_boottime_or_monotonic(&t->timestamp, 0);
+
+ m->host_machine = t;
+
+ return 0;
+}
+
+int manager_enumerate_machines(Manager *m) {
+ _cleanup_closedir_ DIR *d = NULL;
+ struct dirent *de;
+ int r = 0;
+
+ assert(m);
+
+ r = manager_add_host_machine(m);
+ if (r < 0)
+ return r;
+
+ /* Read in machine data stored on disk */
+ d = opendir("/run/systemd/machines");
+ if (!d) {
+ if (errno == ENOENT)
+ return 0;
+
+ return log_error_errno(errno, "Failed to open /run/systemd/machines: %m");
+ }
+
+ FOREACH_DIRENT(de, d, return -errno) {
+ struct Machine *machine;
+ int k;
+
+ if (!dirent_is_file(de))
+ continue;
+
+ /* Ignore symlinks that map the unit name to the machine */
+ if (startswith(de->d_name, "unit:"))
+ continue;
+
+ if (!machine_name_is_valid(de->d_name))
+ continue;
+
+ k = manager_add_machine(m, de->d_name, &machine);
+ if (k < 0) {
+ r = log_error_errno(k, "Failed to add machine by file name %s: %m", de->d_name);
+ continue;
+ }
+
+ machine_add_to_gc_queue(machine);
+
+ k = machine_load(machine);
+ if (k < 0)
+ r = k;
+ }
+
+ return r;
+}
+
+static int manager_connect_bus(Manager *m) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ int r;
+
+ assert(m);
+ assert(!m->bus);
+
+ r = sd_bus_default_system(&m->bus);
+ if (r < 0)
+ return log_error_errno(r, "Failed to connect to system bus: %m");
+
+ r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", manager_vtable, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add manager object vtable: %m");
+
+ r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/machine1/machine", "org.freedesktop.machine1.Machine", machine_vtable, machine_object_find, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add machine object vtable: %m");
+
+ r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/machine1/machine", machine_node_enumerator, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add machine enumerator: %m");
+
+ r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/machine1/image", "org.freedesktop.machine1.Image", image_vtable, image_object_find, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add image object vtable: %m");
+
+ r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/machine1/image", image_node_enumerator, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add image enumerator: %m");
+
+ r = sd_bus_add_match(m->bus,
+ NULL,
+ "type='signal',"
+ "sender='org.freedesktop.systemd1',"
+ "interface='org.freedesktop.systemd1.Manager',"
+ "member='JobRemoved',"
+ "path='/org/freedesktop/systemd1'",
+ match_job_removed,
+ m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add match for JobRemoved: %m");
+
+ r = sd_bus_add_match(m->bus,
+ NULL,
+ "type='signal',"
+ "sender='org.freedesktop.systemd1',"
+ "interface='org.freedesktop.systemd1.Manager',"
+ "member='UnitRemoved',"
+ "path='/org/freedesktop/systemd1'",
+ match_unit_removed,
+ m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add match for UnitRemoved: %m");
+
+ r = sd_bus_add_match(m->bus,
+ NULL,
+ "type='signal',"
+ "sender='org.freedesktop.systemd1',"
+ "interface='org.freedesktop.DBus.Properties',"
+ "member='PropertiesChanged',"
+ "arg0='org.freedesktop.systemd1.Unit'",
+ match_properties_changed,
+ m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add match for PropertiesChanged: %m");
+
+ r = sd_bus_add_match(m->bus,
+ NULL,
+ "type='signal',"
+ "sender='org.freedesktop.systemd1',"
+ "interface='org.freedesktop.systemd1.Manager',"
+ "member='Reloading',"
+ "path='/org/freedesktop/systemd1'",
+ match_reloading,
+ m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add match for Reloading: %m");
+
+ r = sd_bus_call_method(
+ m->bus,
+ "org.freedesktop.systemd1",
+ "/org/freedesktop/systemd1",
+ "org.freedesktop.systemd1.Manager",
+ "Subscribe",
+ &error,
+ NULL, NULL);
+ if (r < 0) {
+ log_error("Failed to enable subscription: %s", bus_error_message(&error, r));
+ return r;
+ }
+
+ r = sd_bus_request_name(m->bus, "org.freedesktop.machine1", 0);
+ if (r < 0)
+ return log_error_errno(r, "Failed to register name: %m");
+
+ r = sd_bus_attach_event(m->bus, m->event, 0);
+ if (r < 0)
+ return log_error_errno(r, "Failed to attach bus to event loop: %m");
+
+ return 0;
+}
+
+void manager_gc(Manager *m, bool drop_not_started) {
+ Machine *machine;
+
+ assert(m);
+
+ while ((machine = m->machine_gc_queue)) {
+ LIST_REMOVE(gc_queue, m->machine_gc_queue, machine);
+ machine->in_gc_queue = false;
+
+ /* First, if we are not closing yet, initiate stopping */
+ if (!machine_check_gc(machine, drop_not_started) &&
+ machine_get_state(machine) != MACHINE_CLOSING)
+ machine_stop(machine);
+
+ /* Now, the stop probably made this referenced
+ * again, but if it didn't, then it's time to let it
+ * go entirely. */
+ if (!machine_check_gc(machine, drop_not_started)) {
+ machine_finalize(machine);
+ machine_free(machine);
+ }
+ }
+}
+
+int manager_startup(Manager *m) {
+ Machine *machine;
+ Iterator i;
+ int r;
+
+ assert(m);
+
+ /* Connect to the bus */
+ r = manager_connect_bus(m);
+ if (r < 0)
+ return r;
+
+ /* Deserialize state */
+ manager_enumerate_machines(m);
+
+ /* Remove stale objects before we start them */
+ manager_gc(m, false);
+
+ /* And start everything */
+ HASHMAP_FOREACH(machine, m->machines, i)
+ machine_start(machine, NULL, NULL);
+
+ return 0;
+}
+
+static bool check_idle(void *userdata) {
+ Manager *m = userdata;
+
+ if (m->operations)
+ return false;
+
+ manager_gc(m, true);
+
+ return hashmap_isempty(m->machines);
+}
+
+int manager_run(Manager *m) {
+ assert(m);
+
+ return bus_event_loop_with_idle(
+ m->event,
+ m->bus,
+ "org.freedesktop.machine1",
+ DEFAULT_EXIT_USEC,
+ check_idle, m);
+}
+
+int main(int argc, char *argv[]) {
+ Manager *m = NULL;
+ int r;
+
+ log_set_target(LOG_TARGET_AUTO);
+ log_set_facility(LOG_AUTH);
+ log_parse_environment();
+ log_open();
+
+ umask(0022);
+
+ if (argc != 1) {
+ log_error("This program takes no arguments.");
+ r = -EINVAL;
+ goto finish;
+ }
+
+ /* Always create the directories people can create inotify
+ * watches in. Note that some applications might check for the
+ * existence of /run/systemd/machines/ to determine whether
+ * machined is available, so please always make sure this
+ * check stays in. */
+ mkdir_label("/run/systemd/machines", 0755);
+
+ assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0);
+
+ m = manager_new();
+ if (!m) {
+ r = log_oom();
+ goto finish;
+ }
+
+ r = manager_startup(m);
+ if (r < 0) {
+ log_error_errno(r, "Failed to fully start up daemon: %m");
+ goto finish;
+ }
+
+ log_debug("systemd-machined running as pid "PID_FMT, getpid());
+
+ sd_notify(false,
+ "READY=1\n"
+ "STATUS=Processing requests...");
+
+ r = manager_run(m);
+
+ log_debug("systemd-machined stopped as pid "PID_FMT, getpid());
+
+finish:
+ manager_free(m);
+
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 10:37:30 +0000