| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| This file is part of systemd. |
| |
| Copyright 2011 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 "machined.h" |
| #include "machine.h" |
| #include "dbus-common.h" |
| |
| #define BUS_MACHINE_INTERFACE \ |
| " <interface name=\"org.freedesktop.machine1.Machine\">\n" \ |
| " <method name=\"Terminate\"/>\n" \ |
| " <method name=\"Kill\">\n" \ |
| " <arg name=\"who\" type=\"s\"/>\n" \ |
| " <arg name=\"signal\" type=\"s\"/>\n" \ |
| " </method>\n" \ |
| " <property name=\"Name\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"Id\" type=\"ay\" access=\"read\"/>\n" \ |
| " <property name=\"Timestamp\" type=\"t\" access=\"read\"/>\n" \ |
| " <property name=\"TimestampMonotonic\" type=\"t\" access=\"read\"/>\n" \ |
| " <property name=\"Service\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"Scope\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"Leader\" type=\"u\" access=\"read\"/>\n" \ |
| " <property name=\"Class\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"State\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"RootDirectory\" type=\"s\" access=\"read\"/>\n" \ |
| " </interface>\n" |
| |
| #define INTROSPECTION \ |
| DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \ |
| "<node>\n" \ |
| BUS_MACHINE_INTERFACE \ |
| BUS_PROPERTIES_INTERFACE \ |
| BUS_PEER_INTERFACE \ |
| BUS_INTROSPECTABLE_INTERFACE \ |
| "</node>\n" |
| |
| #define INTERFACES_LIST \ |
| BUS_GENERIC_INTERFACES_LIST \ |
| "org.freedesktop.machine1.Machine\0" |
| |
| static int bus_machine_append_id(DBusMessageIter *i, const char *property, void *data) { |
| DBusMessageIter sub; |
| Machine *m = data; |
| dbus_bool_t b; |
| void *p; |
| |
| assert(i); |
| assert(property); |
| assert(m); |
| |
| if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "y", &sub)) |
| return -ENOMEM; |
| |
| p = &m->id; |
| b = dbus_message_iter_append_fixed_array(&sub, DBUS_TYPE_BYTE, &p, 16); |
| if (!b) |
| return -ENOMEM; |
| |
| if (!dbus_message_iter_close_container(i, &sub)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_machine_append_state(DBusMessageIter *i, const char *property, void *data) { |
| Machine *m = data; |
| const char *state; |
| |
| assert(i); |
| assert(property); |
| assert(m); |
| |
| state = machine_state_to_string(machine_get_state(m)); |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int get_machine_for_path(Manager *m, const char *path, Machine **_machine) { |
| _cleanup_free_ char *e = NULL; |
| Machine *machine; |
| |
| assert(m); |
| assert(path); |
| assert(_machine); |
| |
| if (!startswith(path, "/org/freedesktop/machine1/machine/")) |
| return -EINVAL; |
| |
| e = bus_path_unescape(path + 34); |
| if (!e) |
| return -ENOMEM; |
| |
| machine = hashmap_get(m->machines, e); |
| if (!machine) |
| return -ENOENT; |
| |
| *_machine = machine; |
| return 0; |
| } |
| |
| static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_machine_append_class, machine_class, MachineClass); |
| |
| static const BusProperty bus_machine_machine_properties[] = { |
| { "Name", bus_property_append_string, "s", offsetof(Machine, name), true }, |
| { "Id", bus_machine_append_id, "ay", 0 }, |
| { "Timestamp", bus_property_append_usec, "t", offsetof(Machine, timestamp.realtime) }, |
| { "TimestampMonotonic", bus_property_append_usec, "t", offsetof(Machine, timestamp.monotonic) }, |
| { "Service", bus_property_append_string, "s", offsetof(Machine, service), true }, |
| { "Scope", bus_property_append_string, "s", offsetof(Machine, scope), true }, |
| { "Leader", bus_property_append_pid, "u", offsetof(Machine, leader) }, |
| { "Class", bus_machine_append_class, "s", offsetof(Machine, class) }, |
| { "State", bus_machine_append_state, "s", 0 }, |
| { "RootDirectory", bus_property_append_string, "s", offsetof(Machine, root_directory), true }, |
| { NULL, } |
| }; |
| |
| static DBusHandlerResult machine_message_dispatch( |
| Machine *m, |
| DBusConnection *connection, |
| DBusMessage *message) { |
| |
| DBusError error; |
| _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; |
| int r; |
| |
| assert(m); |
| assert(connection); |
| assert(message); |
| |
| if (dbus_message_is_method_call(message, "org.freedesktop.machine1.Machine", "Terminate")) { |
| |
| r = machine_stop(m); |
| if (r < 0) |
| return bus_send_error_reply(connection, message, NULL, r); |
| |
| reply = dbus_message_new_method_return(message); |
| if (!reply) |
| goto oom; |
| |
| } else if (dbus_message_is_method_call(message, "org.freedesktop.machine1.Machine", "Kill")) { |
| const char *swho; |
| int32_t signo; |
| KillWho who; |
| |
| if (!dbus_message_get_args( |
| message, |
| &error, |
| DBUS_TYPE_STRING, &swho, |
| DBUS_TYPE_INT32, &signo, |
| DBUS_TYPE_INVALID)) |
| return bus_send_error_reply(connection, message, &error, -EINVAL); |
| |
| if (isempty(swho)) |
| who = KILL_ALL; |
| else { |
| who = kill_who_from_string(swho); |
| if (who < 0) |
| return bus_send_error_reply(connection, message, &error, -EINVAL); |
| } |
| |
| if (signo <= 0 || signo >= _NSIG) |
| return bus_send_error_reply(connection, message, &error, -EINVAL); |
| |
| r = machine_kill(m, who, signo); |
| if (r < 0) |
| return bus_send_error_reply(connection, message, NULL, r); |
| |
| reply = dbus_message_new_method_return(message); |
| if (!reply) |
| goto oom; |
| |
| } else { |
| const BusBoundProperties bps[] = { |
| { "org.freedesktop.machine1.Machine", bus_machine_machine_properties, m }, |
| { NULL, } |
| }; |
| |
| return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, bps); |
| } |
| |
| if (reply) { |
| if (!bus_maybe_send_reply(connection, message, reply)) |
| goto oom; |
| } |
| |
| return DBUS_HANDLER_RESULT_HANDLED; |
| |
| oom: |
| dbus_error_free(&error); |
| |
| return DBUS_HANDLER_RESULT_NEED_MEMORY; |
| } |
| |
| static DBusHandlerResult machine_message_handler( |
| DBusConnection *connection, |
| DBusMessage *message, |
| void *userdata) { |
| |
| Manager *manager = userdata; |
| Machine *m; |
| int r; |
| |
| r = get_machine_for_path(manager, dbus_message_get_path(message), &m); |
| if (r < 0) { |
| |
| if (r == -ENOMEM) |
| return DBUS_HANDLER_RESULT_NEED_MEMORY; |
| |
| if (r == -ENOENT) { |
| DBusError e; |
| |
| dbus_error_init(&e); |
| dbus_set_error_const(&e, DBUS_ERROR_UNKNOWN_OBJECT, "Unknown machine"); |
| return bus_send_error_reply(connection, message, &e, r); |
| } |
| |
| return bus_send_error_reply(connection, message, NULL, r); |
| } |
| |
| return machine_message_dispatch(m, connection, message); |
| } |
| |
| const DBusObjectPathVTable bus_machine_vtable = { |
| .message_function = machine_message_handler |
| }; |
| |
| char *machine_bus_path(Machine *m) { |
| _cleanup_free_ char *e = NULL; |
| |
| assert(m); |
| |
| e = bus_path_escape(m->name); |
| if (!e) |
| return NULL; |
| |
| return strappend("/org/freedesktop/machine1/machine/", e); |
| } |
| |
| int machine_send_signal(Machine *m, bool new_machine) { |
| _cleanup_dbus_message_unref_ DBusMessage *msg = NULL; |
| _cleanup_free_ char *p = NULL; |
| |
| assert(m); |
| |
| msg = dbus_message_new_signal("/org/freedesktop/machine1", |
| "org.freedesktop.machine1.Manager", |
| new_machine ? "MachineNew" : "MachineRemoved"); |
| |
| if (!m) |
| return -ENOMEM; |
| |
| p = machine_bus_path(m); |
| if (!p) |
| return -ENOMEM; |
| |
| if (!dbus_message_append_args( |
| msg, |
| DBUS_TYPE_STRING, &m->name, |
| DBUS_TYPE_OBJECT_PATH, &p, |
| DBUS_TYPE_INVALID)) |
| return -ENOMEM; |
| |
| if (!dbus_connection_send(m->manager->bus, msg, NULL)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| int machine_send_changed(Machine *m, const char *properties) { |
| _cleanup_dbus_message_unref_ DBusMessage *msg = NULL; |
| _cleanup_free_ char *p = NULL; |
| |
| assert(m); |
| |
| if (!m->started) |
| return 0; |
| |
| p = machine_bus_path(m); |
| if (!p) |
| return -ENOMEM; |
| |
| msg = bus_properties_changed_new(p, "org.freedesktop.machine1.Machine", properties); |
| if (!msg) |
| return -ENOMEM; |
| |
| if (!dbus_connection_send(m->manager->bus, msg, NULL)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| int machine_send_create_reply(Machine *m, DBusError *error) { |
| _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; |
| |
| assert(m); |
| |
| if (!m->create_message) |
| return 0; |
| |
| if (error) { |
| DBusError buffer; |
| |
| dbus_error_init(&buffer); |
| |
| if (!error || !dbus_error_is_set(error)) { |
| dbus_set_error_const(&buffer, DBUS_ERROR_INVALID_ARGS, "Invalid Arguments"); |
| error = &buffer; |
| } |
| |
| reply = dbus_message_new_error(m->create_message, error->name, error->message); |
| dbus_error_free(&buffer); |
| |
| if (!reply) |
| return log_oom(); |
| } else { |
| _cleanup_free_ char *p = NULL; |
| |
| p = machine_bus_path(m); |
| if (!p) |
| return log_oom(); |
| |
| reply = dbus_message_new_method_return(m->create_message); |
| if (!reply) |
| return log_oom(); |
| |
| if (!dbus_message_append_args(reply, DBUS_TYPE_OBJECT_PATH, &p, DBUS_TYPE_INVALID)) |
| return log_oom(); |
| } |
| |
| /* Update the machine state file before we notify the client |
| * about the result. */ |
| machine_save(m); |
| |
| if (!dbus_connection_send(m->manager->bus, reply, NULL)) |
| return log_oom(); |
| |
| dbus_message_unref(m->create_message); |
| m->create_message = NULL; |
| |
| return 0; |
| } |