| /* 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(); |
| |
| r = machine_new(m, MACHINE_HOST, ".host", &t); |
| if (r < 0) |
| return log_error_errno(r, "Failed to create machine: %m"); |
| |
| 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); |
