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-rw-r--r--src/machine/machined.c364
1 files changed, 364 insertions, 0 deletions
diff --git a/src/machine/machined.c b/src/machine/machined.c
new file mode 100644
index 0000000..9ecba87
--- /dev/null
+++ b/src/machine/machined.c
@@ -0,0 +1,364 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "bus-error.h"
+#include "bus-locator.h"
+#include "bus-log-control-api.h"
+#include "bus-polkit.h"
+#include "cgroup-util.h"
+#include "daemon-util.h"
+#include "dirent-util.h"
+#include "discover-image.h"
+#include "fd-util.h"
+#include "format-util.h"
+#include "hostname-util.h"
+#include "machined-varlink.h"
+#include "machined.h"
+#include "main-func.h"
+#include "mkdir-label.h"
+#include "process-util.h"
+#include "service-util.h"
+#include "signal-util.h"
+#include "special.h"
+
+static Manager* manager_unref(Manager *m);
+DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_unref);
+
+DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(machine_hash_ops, char, string_hash_func, string_compare_func, Machine, machine_free);
+
+static int manager_new(Manager **ret) {
+ _cleanup_(manager_unrefp) Manager *m = NULL;
+ int r;
+
+ assert(ret);
+
+ m = new0(Manager, 1);
+ if (!m)
+ return -ENOMEM;
+
+ m->machines = hashmap_new(&machine_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)
+ return -ENOMEM;
+
+ r = sd_event_default(&m->event);
+ if (r < 0)
+ return r;
+
+ r = sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
+ if (r < 0)
+ return r;
+
+ r = sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
+ if (r < 0)
+ return r;
+
+ (void) sd_event_set_watchdog(m->event, true);
+
+ *ret = TAKE_PTR(m);
+ return 0;
+}
+
+static Manager* manager_unref(Manager *m) {
+ if (!m)
+ return NULL;
+
+ while (m->operations)
+ operation_free(m->operations);
+
+ assert(m->n_operations == 0);
+
+ hashmap_free(m->machines); /* This will free all machines, so that the machine_units/machine_leaders is empty */
+ hashmap_free(m->machine_units);
+ hashmap_free(m->machine_leaders);
+ hashmap_free(m->image_cache);
+
+ sd_event_source_unref(m->image_cache_defer_event);
+#if ENABLE_NSCD
+ sd_event_source_unref(m->nscd_cache_flush_event);
+#endif
+
+ bus_verify_polkit_async_registry_free(m->polkit_registry);
+
+ manager_varlink_done(m);
+
+ sd_bus_flush_close_unref(m->bus);
+ sd_event_unref(m->event);
+
+ return mfree(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(SPECIAL_ROOT_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 = TAKE_PTR(rd);
+ t->unit = TAKE_PTR(unit);
+
+ dual_timestamp_from_boottime(&t->timestamp, 0);
+
+ m->host_machine = t;
+
+ return 0;
+}
+
+static int manager_enumerate_machines(Manager *m) {
+ _cleanup_closedir_ DIR *d = NULL;
+ int r;
+
+ 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 (!hostname_is_valid(de->d_name, 0))
+ 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) {
+ 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 = bus_add_implementation(m->bus, &manager_object, m);
+ if (r < 0)
+ return r;
+
+ r = bus_match_signal_async(m->bus, NULL, bus_systemd_mgr, "JobRemoved", match_job_removed, NULL, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add match for JobRemoved: %m");
+
+ r = bus_match_signal_async(m->bus, NULL, bus_systemd_mgr, "UnitRemoved", match_unit_removed, NULL, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to request match for UnitRemoved: %m");
+
+ r = sd_bus_match_signal_async(
+ m->bus,
+ NULL,
+ "org.freedesktop.systemd1",
+ NULL,
+ "org.freedesktop.DBus.Properties",
+ "PropertiesChanged",
+ match_properties_changed, NULL, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to request match for PropertiesChanged: %m");
+
+ r = bus_match_signal_async(m->bus, NULL, bus_systemd_mgr, "Reloading", match_reloading, NULL, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to request match for Reloading: %m");
+
+ r = bus_call_method_async(m->bus, NULL, bus_systemd_mgr, "Subscribe", NULL, NULL, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to enable subscription: %m");
+
+ r = bus_log_control_api_register(m->bus);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.machine1", 0, NULL, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to request 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;
+}
+
+static 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_may_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_may_gc(machine, drop_not_started)) {
+ machine_finalize(machine);
+ machine_free(machine);
+ }
+ }
+}
+
+static int manager_startup(Manager *m) {
+ Machine *machine;
+ int r;
+
+ assert(m);
+
+ /* Connect to the bus */
+ r = manager_connect_bus(m);
+ if (r < 0)
+ return r;
+
+ /* Set up Varlink service */
+ r = manager_varlink_init(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)
+ machine_start(machine, NULL, NULL);
+
+ return 0;
+}
+
+static bool check_idle(void *userdata) {
+ Manager *m = userdata;
+
+ if (m->operations)
+ return false;
+
+ if (varlink_server_current_connections(m->varlink_server) > 0)
+ return false;
+
+ manager_gc(m, true);
+
+ return hashmap_isempty(m->machines);
+}
+
+static 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);
+}
+
+static int run(int argc, char *argv[]) {
+ _cleanup_(manager_unrefp) Manager *m = NULL;
+ int r;
+
+ log_set_facility(LOG_AUTH);
+ log_setup();
+
+ r = service_parse_argv("systemd-machined.service",
+ "Manage registrations of local VMs and containers.",
+ BUS_IMPLEMENTATIONS(&manager_object,
+ &log_control_object),
+ argc, argv);
+ if (r <= 0)
+ return r;
+
+ umask(0022);
+
+ /* 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. */
+ (void) mkdir_label("/run/systemd/machines", 0755);
+
+ assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, SIGTERM, SIGINT, -1) >= 0);
+
+ r = manager_new(&m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate manager object: %m");
+
+ r = manager_startup(m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to fully start up daemon: %m");
+
+ log_debug("systemd-machined running as pid "PID_FMT, getpid_cached());
+ r = sd_notify(false, NOTIFY_READY);
+ if (r < 0)
+ log_warning_errno(r, "Failed to send readiness notification, ignoring: %m");
+
+ r = manager_run(m);
+
+ (void) sd_notify(false, NOTIFY_STOPPING);
+ log_debug("systemd-machined stopped as pid "PID_FMT, getpid_cached());
+ return r;
+}
+
+DEFINE_MAIN_FUNCTION(run);
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