| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include "sd-bus.h" |
| |
| #include "bus-error.h" |
| #include "bus-locator.h" |
| #include "bus-unit-util.h" |
| #include "bus-util.h" |
| #include "bus-wait-for-jobs.h" |
| #include "nspawn-register.h" |
| #include "special.h" |
| #include "stat-util.h" |
| #include "strv.h" |
| |
| static int append_machine_properties( |
| sd_bus_message *m, |
| CustomMount *mounts, |
| unsigned n_mounts, |
| int kill_signal) { |
| |
| unsigned j; |
| int r; |
| |
| assert(m); |
| |
| r = sd_bus_message_append(m, "(sv)", "DevicePolicy", "s", "closed"); |
| if (r < 0) |
| return bus_log_create_error(r); |
| |
| /* If you make changes here, also make sure to update systemd-nspawn@.service, to keep the device policies in |
| * sync regardless if we are run with or without the --keep-unit switch. */ |
| r = sd_bus_message_append(m, "(sv)", "DeviceAllow", "a(ss)", 2, |
| /* Allow the container to |
| * access and create the API |
| * device nodes, so that |
| * PrivateDevices= in the |
| * container can work |
| * fine */ |
| "/dev/net/tun", "rwm", |
| /* Allow the container |
| * access to ptys. However, |
| * do not permit the |
| * container to ever create |
| * these device nodes. */ |
| "char-pts", "rw"); |
| if (r < 0) |
| return bus_log_create_error(r); |
| |
| for (j = 0; j < n_mounts; j++) { |
| CustomMount *cm = mounts + j; |
| |
| if (cm->type != CUSTOM_MOUNT_BIND) |
| continue; |
| |
| r = is_device_node(cm->source); |
| if (r == -ENOENT) { |
| /* The bind source might only appear as the image is put together, hence don't complain */ |
| log_debug_errno(r, "Bind mount source %s not found, ignoring: %m", cm->source); |
| continue; |
| } |
| if (r < 0) |
| return log_error_errno(r, "Failed to stat %s: %m", cm->source); |
| |
| if (r) { |
| r = sd_bus_message_append(m, "(sv)", "DeviceAllow", "a(ss)", 1, |
| cm->source, cm->read_only ? "r" : "rw"); |
| if (r < 0) |
| return log_error_errno(r, "Failed to append message arguments: %m"); |
| } |
| } |
| |
| if (kill_signal != 0) { |
| r = sd_bus_message_append(m, "(sv)", "KillSignal", "i", kill_signal); |
| if (r < 0) |
| return bus_log_create_error(r); |
| |
| r = sd_bus_message_append(m, "(sv)", "KillMode", "s", "mixed"); |
| if (r < 0) |
| return bus_log_create_error(r); |
| } |
| |
| return 0; |
| } |
| |
| static int append_controller_property(sd_bus *bus, sd_bus_message *m) { |
| const char *unique; |
| int r; |
| |
| assert(bus); |
| assert(m); |
| |
| r = sd_bus_get_unique_name(bus, &unique); |
| if (r < 0) |
| return log_error_errno(r, "Failed to get unique name: %m"); |
| |
| r = sd_bus_message_append(m, "(sv)", "Controller", "s", unique); |
| if (r < 0) |
| return bus_log_create_error(r); |
| |
| return 0; |
| } |
| |
| int register_machine( |
| sd_bus *bus, |
| const char *machine_name, |
| pid_t pid, |
| const char *directory, |
| sd_id128_t uuid, |
| int local_ifindex, |
| const char *slice, |
| CustomMount *mounts, |
| unsigned n_mounts, |
| int kill_signal, |
| char **properties, |
| sd_bus_message *properties_message, |
| bool keep_unit, |
| const char *service) { |
| |
| _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
| int r; |
| |
| assert(bus); |
| |
| if (keep_unit) { |
| r = bus_call_method( |
| bus, |
| bus_machine_mgr, |
| "RegisterMachineWithNetwork", |
| &error, |
| NULL, |
| "sayssusai", |
| machine_name, |
| SD_BUS_MESSAGE_APPEND_ID128(uuid), |
| service, |
| "container", |
| (uint32_t) pid, |
| strempty(directory), |
| local_ifindex > 0 ? 1 : 0, local_ifindex); |
| } else { |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
| |
| r = bus_message_new_method_call(bus, &m, bus_machine_mgr, "CreateMachineWithNetwork"); |
| if (r < 0) |
| return bus_log_create_error(r); |
| |
| r = sd_bus_message_append( |
| m, |
| "sayssusai", |
| machine_name, |
| SD_BUS_MESSAGE_APPEND_ID128(uuid), |
| service, |
| "container", |
| (uint32_t) pid, |
| strempty(directory), |
| local_ifindex > 0 ? 1 : 0, local_ifindex); |
| if (r < 0) |
| return bus_log_create_error(r); |
| |
| r = sd_bus_message_open_container(m, 'a', "(sv)"); |
| if (r < 0) |
| return bus_log_create_error(r); |
| |
| if (!isempty(slice)) { |
| r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice); |
| if (r < 0) |
| return bus_log_create_error(r); |
| } |
| |
| r = append_controller_property(bus, m); |
| if (r < 0) |
| return r; |
| |
| r = append_machine_properties( |
| m, |
| mounts, |
| n_mounts, |
| kill_signal); |
| if (r < 0) |
| return r; |
| |
| if (properties_message) { |
| r = sd_bus_message_copy(m, properties_message, true); |
| if (r < 0) |
| return bus_log_create_error(r); |
| } |
| |
| r = bus_append_unit_property_assignment_many(m, UNIT_SERVICE, properties); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_close_container(m); |
| if (r < 0) |
| return bus_log_create_error(r); |
| |
| r = sd_bus_call(bus, m, 0, &error, NULL); |
| } |
| |
| if (r < 0) |
| return log_error_errno(r, "Failed to register machine: %s", bus_error_message(&error, r)); |
| |
| return 0; |
| } |
| |
| int unregister_machine( |
| sd_bus *bus, |
| const char *machine_name) { |
| |
| _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
| int r; |
| |
| assert(bus); |
| |
| r = bus_call_method(bus, bus_machine_mgr, "UnregisterMachine", &error, NULL, "s", machine_name); |
| if (r < 0) |
| log_debug("Failed to unregister machine: %s", bus_error_message(&error, r)); |
| |
| return 0; |
| } |
| |
| int allocate_scope( |
| sd_bus *bus, |
| const char *machine_name, |
| pid_t pid, |
| const char *slice, |
| CustomMount *mounts, |
| unsigned n_mounts, |
| int kill_signal, |
| char **properties, |
| sd_bus_message *properties_message) { |
| |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL; |
| _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
| _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL; |
| _cleanup_free_ char *scope = NULL; |
| const char *description, *object; |
| int r; |
| |
| assert(bus); |
| |
| r = bus_wait_for_jobs_new(bus, &w); |
| if (r < 0) |
| return log_error_errno(r, "Could not watch job: %m"); |
| |
| r = unit_name_mangle_with_suffix(machine_name, "as machine name", 0, ".scope", &scope); |
| if (r < 0) |
| return log_error_errno(r, "Failed to mangle scope name: %m"); |
| |
| r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "StartTransientUnit"); |
| if (r < 0) |
| return bus_log_create_error(r); |
| |
| r = sd_bus_message_append(m, "ss", scope, "fail"); |
| if (r < 0) |
| return bus_log_create_error(r); |
| |
| /* Properties */ |
| r = sd_bus_message_open_container(m, 'a', "(sv)"); |
| if (r < 0) |
| return bus_log_create_error(r); |
| |
| description = strjoina("Container ", machine_name); |
| |
| r = sd_bus_message_append(m, "(sv)(sv)(sv)(sv)(sv)(sv)", |
| "PIDs", "au", 1, pid, |
| "Description", "s", description, |
| "Delegate", "b", 1, |
| "CollectMode", "s", "inactive-or-failed", |
| "AddRef", "b", 1, |
| "Slice", "s", isempty(slice) ? SPECIAL_MACHINE_SLICE : slice); |
| if (r < 0) |
| return bus_log_create_error(r); |
| |
| r = append_controller_property(bus, m); |
| if (r < 0) |
| return r; |
| |
| if (properties_message) { |
| r = sd_bus_message_copy(m, properties_message, true); |
| if (r < 0) |
| return bus_log_create_error(r); |
| } |
| |
| r = append_machine_properties( |
| m, |
| mounts, |
| n_mounts, |
| kill_signal); |
| if (r < 0) |
| return r; |
| |
| r = bus_append_unit_property_assignment_many(m, UNIT_SCOPE, properties); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_close_container(m); |
| if (r < 0) |
| return bus_log_create_error(r); |
| |
| /* No auxiliary units */ |
| r = sd_bus_message_append( |
| m, |
| "a(sa(sv))", |
| 0); |
| if (r < 0) |
| return bus_log_create_error(r); |
| |
| r = sd_bus_call(bus, m, 0, &error, &reply); |
| if (r < 0) |
| return log_error_errno(r, "Failed to allocate scope: %s", bus_error_message(&error, r)); |
| |
| r = sd_bus_message_read(reply, "o", &object); |
| if (r < 0) |
| return bus_log_parse_error(r); |
| |
| r = bus_wait_for_jobs_one(w, object, false, NULL); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| int terminate_scope( |
| sd_bus *bus, |
| const char *machine_name) { |
| |
| _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
| _cleanup_free_ char *scope = NULL; |
| int r; |
| |
| r = unit_name_mangle_with_suffix(machine_name, "to terminate", 0, ".scope", &scope); |
| if (r < 0) |
| return log_error_errno(r, "Failed to mangle scope name: %m"); |
| |
| r = bus_call_method(bus, bus_systemd_mgr, "AbandonScope", &error, NULL, "s", scope); |
| if (r < 0) { |
| log_debug_errno(r, "Failed to abandon scope '%s', ignoring: %s", scope, bus_error_message(&error, r)); |
| sd_bus_error_free(&error); |
| } |
| |
| r = bus_call_method( |
| bus, |
| bus_systemd_mgr, |
| "KillUnit", |
| &error, |
| NULL, |
| "ssi", |
| scope, |
| "all", |
| (int32_t) SIGKILL); |
| if (r < 0) { |
| log_debug_errno(r, "Failed to SIGKILL scope '%s', ignoring: %s", scope, bus_error_message(&error, r)); |
| sd_bus_error_free(&error); |
| } |
| |
| r = bus_call_method(bus, bus_systemd_mgr, "UnrefUnit", &error, NULL, "s", scope); |
| if (r < 0) |
| log_debug_errno(r, "Failed to drop reference to scope '%s', ignoring: %s", scope, bus_error_message(&error, r)); |
| |
| return 0; |
| } |
