diff options
Diffstat (limited to 'src/dbus.c')
| -rw-r--r-- | src/dbus.c | 1483 |
1 files changed, 0 insertions, 1483 deletions
diff --git a/src/dbus.c b/src/dbus.c deleted file mode 100644 index ddf91f225a..0000000000 --- a/src/dbus.c +++ /dev/null @@ -1,1483 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2010 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 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 - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <sys/epoll.h> -#include <sys/timerfd.h> -#include <errno.h> -#include <unistd.h> -#include <dbus/dbus.h> - -#include "dbus.h" -#include "log.h" -#include "strv.h" -#include "cgroup.h" -#include "mkdir.h" -#include "dbus-unit.h" -#include "dbus-job.h" -#include "dbus-manager.h" -#include "dbus-service.h" -#include "dbus-socket.h" -#include "dbus-target.h" -#include "dbus-device.h" -#include "dbus-mount.h" -#include "dbus-automount.h" -#include "dbus-snapshot.h" -#include "dbus-swap.h" -#include "dbus-timer.h" -#include "dbus-path.h" -#include "bus-errors.h" -#include "special.h" -#include "dbus-common.h" - -#define CONNECTIONS_MAX 52 - -/* Well-known address (http://dbus.freedesktop.org/doc/dbus-specification.html#message-bus-types) */ -#define DBUS_SYSTEM_BUS_DEFAULT_ADDRESS "unix:path=/var/run/dbus/system_bus_socket" -/* Only used as a fallback */ -#define DBUS_SESSION_BUS_DEFAULT_ADDRESS "autolaunch:" - -static const char bus_properties_interface[] = BUS_PROPERTIES_INTERFACE; -static const char bus_introspectable_interface[] = BUS_INTROSPECTABLE_INTERFACE; - -const char *const bus_interface_table[] = { - "org.freedesktop.DBus.Properties", bus_properties_interface, - "org.freedesktop.DBus.Introspectable", bus_introspectable_interface, - "org.freedesktop.systemd1.Manager", bus_manager_interface, - "org.freedesktop.systemd1.Job", bus_job_interface, - "org.freedesktop.systemd1.Unit", bus_unit_interface, - "org.freedesktop.systemd1.Service", bus_service_interface, - "org.freedesktop.systemd1.Socket", bus_socket_interface, - "org.freedesktop.systemd1.Target", bus_target_interface, - "org.freedesktop.systemd1.Device", bus_device_interface, - "org.freedesktop.systemd1.Mount", bus_mount_interface, - "org.freedesktop.systemd1.Automount", bus_automount_interface, - "org.freedesktop.systemd1.Snapshot", bus_snapshot_interface, - "org.freedesktop.systemd1.Swap", bus_swap_interface, - "org.freedesktop.systemd1.Timer", bus_timer_interface, - "org.freedesktop.systemd1.Path", bus_path_interface, - NULL -}; - -static void bus_done_api(Manager *m); -static void bus_done_system(Manager *m); -static void bus_done_private(Manager *m); -static void shutdown_connection(Manager *m, DBusConnection *c); - -static void bus_dispatch_status(DBusConnection *bus, DBusDispatchStatus status, void *data) { - Manager *m = data; - - assert(bus); - assert(m); - - /* We maintain two sets, one for those connections where we - * requested a dispatch, and another where we didn't. And then, - * we move the connections between the two sets. */ - - if (status == DBUS_DISPATCH_COMPLETE) - set_move_one(m->bus_connections, m->bus_connections_for_dispatch, bus); - else - set_move_one(m->bus_connections_for_dispatch, m->bus_connections, bus); -} - -void bus_watch_event(Manager *m, Watch *w, int events) { - assert(m); - assert(w); - - /* This is called by the event loop whenever there is - * something happening on D-Bus' file handles. */ - - if (!dbus_watch_get_enabled(w->data.bus_watch)) - return; - - dbus_watch_handle(w->data.bus_watch, bus_events_to_flags(events)); -} - -static dbus_bool_t bus_add_watch(DBusWatch *bus_watch, void *data) { - Manager *m = data; - Watch *w; - struct epoll_event ev; - - assert(bus_watch); - assert(m); - - if (!(w = new0(Watch, 1))) - return FALSE; - - w->fd = dbus_watch_get_unix_fd(bus_watch); - w->type = WATCH_DBUS_WATCH; - w->data.bus_watch = bus_watch; - - zero(ev); - ev.events = bus_flags_to_events(bus_watch); - ev.data.ptr = w; - - if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) { - - if (errno != EEXIST) { - free(w); - return FALSE; - } - - /* Hmm, bloody D-Bus creates multiple watches on the - * same fd. epoll() does not like that. As a dirty - * hack we simply dup() the fd and hence get a second - * one we can safely add to the epoll(). */ - - if ((w->fd = dup(w->fd)) < 0) { - free(w); - return FALSE; - } - - if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) { - close_nointr_nofail(w->fd); - free(w); - return FALSE; - } - - w->fd_is_dupped = true; - } - - dbus_watch_set_data(bus_watch, w, NULL); - - return TRUE; -} - -static void bus_remove_watch(DBusWatch *bus_watch, void *data) { - Manager *m = data; - Watch *w; - - assert(bus_watch); - assert(m); - - w = dbus_watch_get_data(bus_watch); - if (!w) - return; - - assert(w->type == WATCH_DBUS_WATCH); - assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); - - if (w->fd_is_dupped) - close_nointr_nofail(w->fd); - - free(w); -} - -static void bus_toggle_watch(DBusWatch *bus_watch, void *data) { - Manager *m = data; - Watch *w; - struct epoll_event ev; - - assert(bus_watch); - assert(m); - - w = dbus_watch_get_data(bus_watch); - if (!w) - return; - - assert(w->type == WATCH_DBUS_WATCH); - - zero(ev); - ev.events = bus_flags_to_events(bus_watch); - ev.data.ptr = w; - - assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_MOD, w->fd, &ev) == 0); -} - -static int bus_timeout_arm(Manager *m, Watch *w) { - struct itimerspec its; - - assert(m); - assert(w); - - zero(its); - - if (dbus_timeout_get_enabled(w->data.bus_timeout)) { - timespec_store(&its.it_value, dbus_timeout_get_interval(w->data.bus_timeout) * USEC_PER_MSEC); - its.it_interval = its.it_value; - } - - if (timerfd_settime(w->fd, 0, &its, NULL) < 0) - return -errno; - - return 0; -} - -void bus_timeout_event(Manager *m, Watch *w, int events) { - assert(m); - assert(w); - - /* This is called by the event loop whenever there is - * something happening on D-Bus' file handles. */ - - if (!(dbus_timeout_get_enabled(w->data.bus_timeout))) - return; - - dbus_timeout_handle(w->data.bus_timeout); -} - -static dbus_bool_t bus_add_timeout(DBusTimeout *timeout, void *data) { - Manager *m = data; - Watch *w; - struct epoll_event ev; - - assert(timeout); - assert(m); - - if (!(w = new0(Watch, 1))) - return FALSE; - - if ((w->fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) - goto fail; - - w->type = WATCH_DBUS_TIMEOUT; - w->data.bus_timeout = timeout; - - if (bus_timeout_arm(m, w) < 0) - goto fail; - - zero(ev); - ev.events = EPOLLIN; - ev.data.ptr = w; - - if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) - goto fail; - - dbus_timeout_set_data(timeout, w, NULL); - - return TRUE; - -fail: - if (w->fd >= 0) - close_nointr_nofail(w->fd); - - free(w); - return FALSE; -} - -static void bus_remove_timeout(DBusTimeout *timeout, void *data) { - Manager *m = data; - Watch *w; - - assert(timeout); - assert(m); - - w = dbus_timeout_get_data(timeout); - if (!w) - return; - - assert(w->type == WATCH_DBUS_TIMEOUT); - - assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); - close_nointr_nofail(w->fd); - free(w); -} - -static void bus_toggle_timeout(DBusTimeout *timeout, void *data) { - Manager *m = data; - Watch *w; - int r; - - assert(timeout); - assert(m); - - w = dbus_timeout_get_data(timeout); - if (!w) - return; - - assert(w->type == WATCH_DBUS_TIMEOUT); - - if ((r = bus_timeout_arm(m, w)) < 0) - log_error("Failed to rearm timer: %s", strerror(-r)); -} - -static DBusHandlerResult api_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) { - Manager *m = data; - DBusError error; - DBusMessage *reply = NULL; - - assert(connection); - assert(message); - assert(m); - - dbus_error_init(&error); - - if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL || - dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL) - log_debug("Got D-Bus request: %s.%s() on %s", - dbus_message_get_interface(message), - dbus_message_get_member(message), - dbus_message_get_path(message)); - - if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) { - log_debug("API D-Bus connection terminated."); - bus_done_api(m); - - } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) { - const char *name, *old_owner, *new_owner; - - if (!dbus_message_get_args(message, &error, - DBUS_TYPE_STRING, &name, - DBUS_TYPE_STRING, &old_owner, - DBUS_TYPE_STRING, &new_owner, - DBUS_TYPE_INVALID)) - log_error("Failed to parse NameOwnerChanged message: %s", bus_error_message(&error)); - else { - if (set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) name)) - log_debug("Subscription client vanished: %s (left: %u)", name, set_size(BUS_CONNECTION_SUBSCRIBED(m, connection))); - - if (old_owner[0] == 0) - old_owner = NULL; - - if (new_owner[0] == 0) - new_owner = NULL; - - manager_dispatch_bus_name_owner_changed(m, name, old_owner, new_owner); - } - } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Activator", "ActivationRequest")) { - const char *name; - - if (!dbus_message_get_args(message, &error, - DBUS_TYPE_STRING, &name, - DBUS_TYPE_INVALID)) - log_error("Failed to parse ActivationRequest message: %s", bus_error_message(&error)); - else { - int r; - Unit *u; - - log_debug("Got D-Bus activation request for %s", name); - - if (manager_unit_pending_inactive(m, SPECIAL_DBUS_SERVICE) || - manager_unit_pending_inactive(m, SPECIAL_DBUS_SOCKET)) { - r = -EADDRNOTAVAIL; - dbus_set_error(&error, BUS_ERROR_SHUTTING_DOWN, "Refusing activation, D-Bus is shutting down."); - } else { - r = manager_load_unit(m, name, NULL, &error, &u); - - if (r >= 0 && u->refuse_manual_start) - r = -EPERM; - - if (r >= 0) - r = manager_add_job(m, JOB_START, u, JOB_REPLACE, true, &error, NULL); - } - - if (r < 0) { - const char *id, *text; - - log_debug("D-Bus activation failed for %s: %s", name, strerror(-r)); - - if (!(reply = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Activator", "ActivationFailure"))) - goto oom; - - id = error.name ? error.name : bus_errno_to_dbus(r); - text = bus_error(&error, r); - - if (!dbus_message_set_destination(reply, DBUS_SERVICE_DBUS) || - !dbus_message_append_args(reply, - DBUS_TYPE_STRING, &name, - DBUS_TYPE_STRING, &id, - DBUS_TYPE_STRING, &text, - DBUS_TYPE_INVALID)) - goto oom; - } - - /* On success we don't do anything, the service will be spawned now */ - } - } - - dbus_error_free(&error); - - if (reply) { - if (!dbus_connection_send(connection, reply, NULL)) - goto oom; - - dbus_message_unref(reply); - } - - return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; - -oom: - if (reply) - dbus_message_unref(reply); - - dbus_error_free(&error); - - return DBUS_HANDLER_RESULT_NEED_MEMORY; -} - -static DBusHandlerResult system_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) { - Manager *m = data; - DBusError error; - - assert(connection); - assert(message); - assert(m); - - dbus_error_init(&error); - - if (m->api_bus != m->system_bus && - (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL || - dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL)) - log_debug("Got D-Bus request on system bus: %s.%s() on %s", - dbus_message_get_interface(message), - dbus_message_get_member(message), - dbus_message_get_path(message)); - - if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) { - log_debug("System D-Bus connection terminated."); - bus_done_system(m); - - } else if (m->running_as != MANAGER_SYSTEM && - dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) { - - const char *cgroup; - - if (!dbus_message_get_args(message, &error, - DBUS_TYPE_STRING, &cgroup, - DBUS_TYPE_INVALID)) - log_error("Failed to parse Released message: %s", bus_error_message(&error)); - else - cgroup_notify_empty(m, cgroup); - } - - dbus_error_free(&error); - return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; -} - -static DBusHandlerResult private_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) { - Manager *m = data; - DBusError error; - - assert(connection); - assert(message); - assert(m); - - dbus_error_init(&error); - - if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL || - dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL) - log_debug("Got D-Bus request: %s.%s() on %s", - dbus_message_get_interface(message), - dbus_message_get_member(message), - dbus_message_get_path(message)); - - if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) - shutdown_connection(m, connection); - else if (m->running_as == MANAGER_SYSTEM && - dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) { - - const char *cgroup; - - if (!dbus_message_get_args(message, &error, - DBUS_TYPE_STRING, &cgroup, - DBUS_TYPE_INVALID)) - log_error("Failed to parse Released message: %s", bus_error_message(&error)); - else - cgroup_notify_empty(m, cgroup); - - /* Forward the message to the system bus, so that user - * instances are notified as well */ - - if (m->system_bus) - dbus_connection_send(m->system_bus, message, NULL); - } - - dbus_error_free(&error); - - return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; -} - -unsigned bus_dispatch(Manager *m) { - DBusConnection *c; - - assert(m); - - if (m->queued_message) { - /* If we cannot get rid of this message we won't - * dispatch any D-Bus messages, so that we won't end - * up wanting to queue another message. */ - - if (m->queued_message_connection) - if (!dbus_connection_send(m->queued_message_connection, m->queued_message, NULL)) - return 0; - - dbus_message_unref(m->queued_message); - m->queued_message = NULL; - m->queued_message_connection = NULL; - } - - if ((c = set_first(m->bus_connections_for_dispatch))) { - if (dbus_connection_dispatch(c) == DBUS_DISPATCH_COMPLETE) - set_move_one(m->bus_connections, m->bus_connections_for_dispatch, c); - - return 1; - } - - return 0; -} - -static void request_name_pending_cb(DBusPendingCall *pending, void *userdata) { - DBusMessage *reply; - DBusError error; - - dbus_error_init(&error); - - assert_se(reply = dbus_pending_call_steal_reply(pending)); - - switch (dbus_message_get_type(reply)) { - - case DBUS_MESSAGE_TYPE_ERROR: - - assert_se(dbus_set_error_from_message(&error, reply)); - log_warning("RequestName() failed: %s", bus_error_message(&error)); - break; - - case DBUS_MESSAGE_TYPE_METHOD_RETURN: { - uint32_t r; - - if (!dbus_message_get_args(reply, - &error, - DBUS_TYPE_UINT32, &r, - DBUS_TYPE_INVALID)) { - log_error("Failed to parse RequestName() reply: %s", bus_error_message(&error)); - break; - } - - if (r == 1) - log_debug("Successfully acquired name."); - else - log_error("Name already owned."); - - break; - } - - default: - assert_not_reached("Invalid reply message"); - } - - dbus_message_unref(reply); - dbus_error_free(&error); -} - -static int request_name(Manager *m) { - const char *name = "org.freedesktop.systemd1"; - /* Allow replacing of our name, to ease implementation of - * reexecution, where we keep the old connection open until - * after the new connection is set up and the name installed - * to allow clients to synchronously wait for reexecution to - * finish */ - uint32_t flags = DBUS_NAME_FLAG_ALLOW_REPLACEMENT|DBUS_NAME_FLAG_REPLACE_EXISTING; - DBusMessage *message = NULL; - DBusPendingCall *pending = NULL; - - if (!(message = dbus_message_new_method_call( - DBUS_SERVICE_DBUS, - DBUS_PATH_DBUS, - DBUS_INTERFACE_DBUS, - "RequestName"))) - goto oom; - - if (!dbus_message_append_args( - message, - DBUS_TYPE_STRING, &name, - DBUS_TYPE_UINT32, &flags, - DBUS_TYPE_INVALID)) - goto oom; - - if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1)) - goto oom; - - if (!dbus_pending_call_set_notify(pending, request_name_pending_cb, m, NULL)) - goto oom; - - dbus_message_unref(message); - dbus_pending_call_unref(pending); - - /* We simple ask for the name and don't wait for it. Sooner or - * later we'll have it. */ - - return 0; - -oom: - if (pending) { - dbus_pending_call_cancel(pending); - dbus_pending_call_unref(pending); - } - - if (message) - dbus_message_unref(message); - - return -ENOMEM; -} - -static void query_name_list_pending_cb(DBusPendingCall *pending, void *userdata) { - DBusMessage *reply; - DBusError error; - Manager *m = userdata; - - assert(m); - - dbus_error_init(&error); - - assert_se(reply = dbus_pending_call_steal_reply(pending)); - - switch (dbus_message_get_type(reply)) { - - case DBUS_MESSAGE_TYPE_ERROR: - - assert_se(dbus_set_error_from_message(&error, reply)); - log_warning("ListNames() failed: %s", bus_error_message(&error)); - break; - - case DBUS_MESSAGE_TYPE_METHOD_RETURN: { - int r; - char **l; - - if ((r = bus_parse_strv(reply, &l)) < 0) - log_warning("Failed to parse ListNames() reply: %s", strerror(-r)); - else { - char **t; - - STRV_FOREACH(t, l) - /* This is a bit hacky, we say the - * owner of the name is the name - * itself, because we don't want the - * extra traffic to figure out the - * real owner. */ - manager_dispatch_bus_name_owner_changed(m, *t, NULL, *t); - - strv_free(l); - } - - break; - } - - default: - assert_not_reached("Invalid reply message"); - } - - dbus_message_unref(reply); - dbus_error_free(&error); -} - -static int query_name_list(Manager *m) { - DBusMessage *message = NULL; - DBusPendingCall *pending = NULL; - - /* Asks for the currently installed bus names */ - - if (!(message = dbus_message_new_method_call( - DBUS_SERVICE_DBUS, - DBUS_PATH_DBUS, - DBUS_INTERFACE_DBUS, - "ListNames"))) - goto oom; - - if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1)) - goto oom; - - if (!dbus_pending_call_set_notify(pending, query_name_list_pending_cb, m, NULL)) - goto oom; - - dbus_message_unref(message); - dbus_pending_call_unref(pending); - - /* We simple ask for the list and don't wait for it. Sooner or - * later we'll get it. */ - - return 0; - -oom: - if (pending) { - dbus_pending_call_cancel(pending); - dbus_pending_call_unref(pending); - } - - if (message) - dbus_message_unref(message); - - return -ENOMEM; -} - -static int bus_setup_loop(Manager *m, DBusConnection *bus) { - assert(m); - assert(bus); - - dbus_connection_set_exit_on_disconnect(bus, FALSE); - - if (!dbus_connection_set_watch_functions(bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) || - !dbus_connection_set_timeout_functions(bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL)) { - log_error("Not enough memory"); - return -ENOMEM; - } - - if (set_put(m->bus_connections_for_dispatch, bus) < 0) { - log_error("Not enough memory"); - return -ENOMEM; - } - - dbus_connection_set_dispatch_status_function(bus, bus_dispatch_status, m, NULL); - return 0; -} - -static dbus_bool_t allow_only_same_user(DBusConnection *connection, unsigned long uid, void *data) { - return uid == 0 || uid == geteuid(); -} - -static void bus_new_connection( - DBusServer *server, - DBusConnection *new_connection, - void *data) { - - Manager *m = data; - - assert(m); - - if (set_size(m->bus_connections) >= CONNECTIONS_MAX) { - log_error("Too many concurrent connections."); - return; - } - - dbus_connection_set_unix_user_function(new_connection, allow_only_same_user, NULL, NULL); - - if (bus_setup_loop(m, new_connection) < 0) - return; - - if (!dbus_connection_register_object_path(new_connection, "/org/freedesktop/systemd1", &bus_manager_vtable, m) || - !dbus_connection_register_fallback(new_connection, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) || - !dbus_connection_register_fallback(new_connection, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) || - !dbus_connection_add_filter(new_connection, private_bus_message_filter, m, NULL)) { - log_error("Not enough memory."); - return; - } - - log_debug("Accepted connection on private bus."); - - dbus_connection_ref(new_connection); -} - -static int init_registered_system_bus(Manager *m) { - char *id; - - if (!dbus_connection_add_filter(m->system_bus, system_bus_message_filter, m, NULL)) { - log_error("Not enough memory"); - return -ENOMEM; - } - - if (m->running_as != MANAGER_SYSTEM) { - DBusError error; - - dbus_error_init(&error); - - dbus_bus_add_match(m->system_bus, - "type='signal'," - "interface='org.freedesktop.systemd1.Agent'," - "member='Released'," - "path='/org/freedesktop/systemd1/agent'", - &error); - - if (dbus_error_is_set(&error)) { - log_error("Failed to register match: %s", bus_error_message(&error)); - dbus_error_free(&error); - return -1; - } - } - - log_debug("Successfully connected to system D-Bus bus %s as %s", - strnull((id = dbus_connection_get_server_id(m->system_bus))), - strnull(dbus_bus_get_unique_name(m->system_bus))); - dbus_free(id); - - return 0; -} - -static int init_registered_api_bus(Manager *m) { - int r; - - if (!dbus_connection_register_object_path(m->api_bus, "/org/freedesktop/systemd1", &bus_manager_vtable, m) || - !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) || - !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) || - !dbus_connection_add_filter(m->api_bus, api_bus_message_filter, m, NULL)) { - log_error("Not enough memory"); - return -ENOMEM; - } - - /* Get NameOwnerChange messages */ - dbus_bus_add_match(m->api_bus, - "type='signal'," - "sender='"DBUS_SERVICE_DBUS"'," - "interface='"DBUS_INTERFACE_DBUS"'," - "member='NameOwnerChanged'," - "path='"DBUS_PATH_DBUS"'", - NULL); - - /* Get activation requests */ - dbus_bus_add_match(m->api_bus, - "type='signal'," - "sender='"DBUS_SERVICE_DBUS"'," - "interface='org.freedesktop.systemd1.Activator'," - "member='ActivationRequest'," - "path='"DBUS_PATH_DBUS"'", - NULL); - - r = request_name(m); - if (r < 0) - return r; - - r = query_name_list(m); - if (r < 0) - return r; - - if (m->running_as == MANAGER_USER) { - char *id; - log_debug("Successfully connected to API D-Bus bus %s as %s", - strnull((id = dbus_connection_get_server_id(m->api_bus))), - strnull(dbus_bus_get_unique_name(m->api_bus))); - dbus_free(id); - } else - log_debug("Successfully initialized API on the system bus"); - - return 0; -} - -static void bus_register_cb(DBusPendingCall *pending, void *userdata) { - Manager *m = userdata; - DBusConnection **conn; - DBusMessage *reply; - DBusError error; - const char *name; - int r = 0; - - dbus_error_init(&error); - - conn = dbus_pending_call_get_data(pending, m->conn_data_slot); - assert(conn == &m->system_bus || conn == &m->api_bus); - - reply = dbus_pending_call_steal_reply(pending); - - switch (dbus_message_get_type(reply)) { - case DBUS_MESSAGE_TYPE_ERROR: - assert_se(dbus_set_error_from_message(&error, reply)); - log_warning("Failed to register to bus: %s", bus_error_message(&error)); - r = -1; - break; - case DBUS_MESSAGE_TYPE_METHOD_RETURN: - if (!dbus_message_get_args(reply, &error, - DBUS_TYPE_STRING, &name, - DBUS_TYPE_INVALID)) { - log_error("Failed to parse Hello reply: %s", bus_error_message(&error)); - r = -1; - break; - } - - log_debug("Received name %s in reply to Hello", name); - if (!dbus_bus_set_unique_name(*conn, name)) { - log_error("Failed to set unique name"); - r = -1; - break; - } - - if (conn == &m->system_bus) { - r = init_registered_system_bus(m); - if (r == 0 && m->running_as == MANAGER_SYSTEM) - r = init_registered_api_bus(m); - } else - r = init_registered_api_bus(m); - - break; - default: - assert_not_reached("Invalid reply message"); - } - - dbus_message_unref(reply); - dbus_error_free(&error); - - if (r < 0) { - if (conn == &m->system_bus) { - log_debug("Failed setting up the system bus"); - bus_done_system(m); - } else { - log_debug("Failed setting up the API bus"); - bus_done_api(m); - } - } -} - -static int manager_bus_async_register(Manager *m, DBusConnection **conn) { - DBusMessage *message = NULL; - DBusPendingCall *pending = NULL; - - message = dbus_message_new_method_call(DBUS_SERVICE_DBUS, - DBUS_PATH_DBUS, - DBUS_INTERFACE_DBUS, - "Hello"); - if (!message) - goto oom; - - if (!dbus_connection_send_with_reply(*conn, message, &pending, -1)) - goto oom; - - if (!dbus_pending_call_set_data(pending, m->conn_data_slot, conn, NULL)) - goto oom; - - if (!dbus_pending_call_set_notify(pending, bus_register_cb, m, NULL)) - goto oom; - - dbus_message_unref(message); - dbus_pending_call_unref(pending); - - return 0; -oom: - if (pending) { - dbus_pending_call_cancel(pending); - dbus_pending_call_unref(pending); - } - - if (message) - dbus_message_unref(message); - - return -ENOMEM; -} - -static DBusConnection* manager_bus_connect_private(Manager *m, DBusBusType type) { - const char *address; - DBusConnection *connection; - DBusError error; - - switch (type) { - case DBUS_BUS_SYSTEM: - address = getenv("DBUS_SYSTEM_BUS_ADDRESS"); - if (!address || !address[0]) - address = DBUS_SYSTEM_BUS_DEFAULT_ADDRESS; - break; - case DBUS_BUS_SESSION: - address = getenv("DBUS_SESSION_BUS_ADDRESS"); - if (!address || !address[0]) - address = DBUS_SESSION_BUS_DEFAULT_ADDRESS; - break; - default: - assert_not_reached("Invalid bus type"); - } - - dbus_error_init(&error); - - connection = dbus_connection_open_private(address, &error); - if (!connection) { - log_warning("Failed to open private bus connection: %s", bus_error_message(&error)); - goto fail; - } - - return connection; -fail: - if (connection) - dbus_connection_close(connection); - dbus_error_free(&error); - return NULL; -} - -static int bus_init_system(Manager *m) { - int r; - - if (m->system_bus) - return 0; - - m->system_bus = manager_bus_connect_private(m, DBUS_BUS_SYSTEM); - if (!m->system_bus) { - log_debug("Failed to connect to system D-Bus, retrying later"); - r = 0; - goto fail; - } - - r = bus_setup_loop(m, m->system_bus); - if (r < 0) - goto fail; - - r = manager_bus_async_register(m, &m->system_bus); - if (r < 0) - goto fail; - - return 0; -fail: - bus_done_system(m); - - return r; -} - -static int bus_init_api(Manager *m) { - int r; - - if (m->api_bus) - return 0; - - if (m->running_as == MANAGER_SYSTEM) { - m->api_bus = m->system_bus; - /* In this mode there is no distinct connection to the API bus, - * the API is published on the system bus. - * bus_register_cb() is aware of that and will init the API - * when the system bus gets registered. - * No need to setup anything here. */ - return 0; - } - - m->api_bus = manager_bus_connect_private(m, DBUS_BUS_SESSION); - if (!m->api_bus) { - log_debug("Failed to connect to API D-Bus, retrying later"); - r = 0; - goto fail; - } - - r = bus_setup_loop(m, m->api_bus); - if (r < 0) - goto fail; - - r = manager_bus_async_register(m, &m->api_bus); - if (r < 0) - goto fail; - - return 0; -fail: - bus_done_api(m); - - return r; -} - -static int bus_init_private(Manager *m) { - DBusError error; - int r; - const char *const external_only[] = { - "EXTERNAL", - NULL - }; - - assert(m); - - dbus_error_init(&error); - - if (m->private_bus) - return 0; - - if (m->running_as == MANAGER_SYSTEM) { - - /* We want the private bus only when running as init */ - if (getpid() != 1) - return 0; - - unlink("/run/systemd/private"); - m->private_bus = dbus_server_listen("unix:path=/run/systemd/private", &error); - } else { - const char *e; - char *p; - - e = getenv("XDG_RUNTIME_DIR"); - if (!e) - return 0; - - if (asprintf(&p, "unix:path=%s/systemd/private", e) < 0) { - log_error("Not enough memory"); - r = -ENOMEM; - goto fail; - } - - mkdir_parents(p+10, 0755); - unlink(p+10); - m->private_bus = dbus_server_listen(p, &error); - free(p); - } - - if (!m->private_bus) { - log_error("Failed to create private D-Bus server: %s", bus_error_message(&error)); - r = -EIO; - goto fail; - } - - if (!dbus_server_set_auth_mechanisms(m->private_bus, (const char**) external_only) || - !dbus_server_set_watch_functions(m->private_bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) || - !dbus_server_set_timeout_functions(m->private_bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL)) { - log_error("Not enough memory"); - r = -ENOMEM; - goto fail; - } - - dbus_server_set_new_connection_function(m->private_bus, bus_new_connection, m, NULL); - - log_debug("Successfully created private D-Bus server."); - - return 0; - -fail: - bus_done_private(m); - dbus_error_free(&error); - - return r; -} - -int bus_init(Manager *m, bool try_bus_connect) { - int r; - - if (set_ensure_allocated(&m->bus_connections, trivial_hash_func, trivial_compare_func) < 0 || - set_ensure_allocated(&m->bus_connections_for_dispatch, trivial_hash_func, trivial_compare_func) < 0) - goto oom; - - if (m->name_data_slot < 0) - if (!dbus_pending_call_allocate_data_slot(&m->name_data_slot)) - goto oom; - - if (m->conn_data_slot < 0) - if (!dbus_pending_call_allocate_data_slot(&m->conn_data_slot)) - goto oom; - - if (m->subscribed_data_slot < 0) - if (!dbus_connection_allocate_data_slot(&m->subscribed_data_slot)) - goto oom; - - if (try_bus_connect) { - if ((r = bus_init_system(m)) < 0 || - (r = bus_init_api(m)) < 0) - return r; - } - - if ((r = bus_init_private(m)) < 0) - return r; - - return 0; -oom: - log_error("Not enough memory"); - return -ENOMEM; -} - -static void shutdown_connection(Manager *m, DBusConnection *c) { - Set *s; - Job *j; - Iterator i; - - HASHMAP_FOREACH(j, m->jobs, i) - if (j->bus == c) { - free(j->bus_client); - j->bus_client = NULL; - - j->bus = NULL; - } - - set_remove(m->bus_connections, c); - set_remove(m->bus_connections_for_dispatch, c); - - if ((s = BUS_CONNECTION_SUBSCRIBED(m, c))) { - char *t; - - while ((t = set_steal_first(s))) - free(t); - - set_free(s); - } - - if (m->queued_message_connection == c) { - m->queued_message_connection = NULL; - - if (m->queued_message) { - dbus_message_unref(m->queued_message); - m->queued_message = NULL; - } - } - - dbus_connection_set_dispatch_status_function(c, NULL, NULL, NULL); - /* system manager cannot afford to block on DBus */ - if (m->running_as != MANAGER_SYSTEM) - dbus_connection_flush(c); - dbus_connection_close(c); - dbus_connection_unref(c); -} - -static void bus_done_api(Manager *m) { - if (!m->api_bus) - return; - - if (m->running_as == MANAGER_USER) - shutdown_connection(m, m->api_bus); - - m->api_bus = NULL; - - if (m->queued_message) { - dbus_message_unref(m->queued_message); - m->queued_message = NULL; - } -} - -static void bus_done_system(Manager *m) { - if (!m->system_bus) - return; - - if (m->running_as == MANAGER_SYSTEM) - bus_done_api(m); - - shutdown_connection(m, m->system_bus); - m->system_bus = NULL; -} - -static void bus_done_private(Manager *m) { - if (!m->private_bus) - return; - - dbus_server_disconnect(m->private_bus); - dbus_server_unref(m->private_bus); - m->private_bus = NULL; -} - -void bus_done(Manager *m) { - DBusConnection *c; - - bus_done_api(m); - bus_done_system(m); - bus_done_private(m); - - while ((c = set_steal_first(m->bus_connections))) - shutdown_connection(m, c); - - while ((c = set_steal_first(m->bus_connections_for_dispatch))) - shutdown_connection(m, c); - - set_free(m->bus_connections); - set_free(m->bus_connections_for_dispatch); - - if (m->name_data_slot >= 0) - dbus_pending_call_free_data_slot(&m->name_data_slot); - - if (m->conn_data_slot >= 0) - dbus_pending_call_free_data_slot(&m->conn_data_slot); - - if (m->subscribed_data_slot >= 0) - dbus_connection_free_data_slot(&m->subscribed_data_slot); -} - -static void query_pid_pending_cb(DBusPendingCall *pending, void *userdata) { - Manager *m = userdata; - DBusMessage *reply; - DBusError error; - const char *name; - - dbus_error_init(&error); - - assert_se(name = BUS_PENDING_CALL_NAME(m, pending)); - assert_se(reply = dbus_pending_call_steal_reply(pending)); - - switch (dbus_message_get_type(reply)) { - - case DBUS_MESSAGE_TYPE_ERROR: - - assert_se(dbus_set_error_from_message(&error, reply)); - log_warning("GetConnectionUnixProcessID() failed: %s", bus_error_message(&error)); - break; - - case DBUS_MESSAGE_TYPE_METHOD_RETURN: { - uint32_t r; - - if (!dbus_message_get_args(reply, - &error, - DBUS_TYPE_UINT32, &r, - DBUS_TYPE_INVALID)) { - log_error("Failed to parse GetConnectionUnixProcessID() reply: %s", bus_error_message(&error)); - break; - } - - manager_dispatch_bus_query_pid_done(m, name, (pid_t) r); - break; - } - - default: - assert_not_reached("Invalid reply message"); - } - - dbus_message_unref(reply); - dbus_error_free(&error); -} - -int bus_query_pid(Manager *m, const char *name) { - DBusMessage *message = NULL; - DBusPendingCall *pending = NULL; - char *n = NULL; - - assert(m); - assert(name); - - if (!(message = dbus_message_new_method_call( - DBUS_SERVICE_DBUS, - DBUS_PATH_DBUS, - DBUS_INTERFACE_DBUS, - "GetConnectionUnixProcessID"))) - goto oom; - - if (!(dbus_message_append_args( - message, - DBUS_TYPE_STRING, &name, - DBUS_TYPE_INVALID))) - goto oom; - - if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1)) - goto oom; - - if (!(n = strdup(name))) - goto oom; - - if (!dbus_pending_call_set_data(pending, m->name_data_slot, n, free)) - goto oom; - - n = NULL; - - if (!dbus_pending_call_set_notify(pending, query_pid_pending_cb, m, NULL)) - goto oom; - - dbus_message_unref(message); - dbus_pending_call_unref(pending); - - return 0; - -oom: - free(n); - - if (pending) { - dbus_pending_call_cancel(pending); - dbus_pending_call_unref(pending); - } - - if (message) - dbus_message_unref(message); - - return -ENOMEM; -} - -int bus_broadcast(Manager *m, DBusMessage *message) { - bool oom = false; - Iterator i; - DBusConnection *c; - - assert(m); - assert(message); - - SET_FOREACH(c, m->bus_connections_for_dispatch, i) - if (c != m->system_bus || m->running_as == MANAGER_SYSTEM) - oom = !dbus_connection_send(c, message, NULL); - - SET_FOREACH(c, m->bus_connections, i) - if (c != m->system_bus || m->running_as == MANAGER_SYSTEM) - oom = !dbus_connection_send(c, message, NULL); - - return oom ? -ENOMEM : 0; -} - -bool bus_has_subscriber(Manager *m) { - Iterator i; - DBusConnection *c; - - assert(m); - - SET_FOREACH(c, m->bus_connections_for_dispatch, i) - if (bus_connection_has_subscriber(m, c)) - return true; - - SET_FOREACH(c, m->bus_connections, i) - if (bus_connection_has_subscriber(m, c)) - return true; - - return false; -} - -bool bus_connection_has_subscriber(Manager *m, DBusConnection *c) { - assert(m); - assert(c); - - return !set_isempty(BUS_CONNECTION_SUBSCRIBED(m, c)); -} - -int bus_fdset_add_all(Manager *m, FDSet *fds) { - Iterator i; - DBusConnection *c; - - assert(m); - assert(fds); - - /* When we are about to reexecute we add all D-Bus fds to the - * set to pass over to the newly executed systemd. They won't - * be used there however, except that they are closed at the - * very end of deserialization, those making it possible for - * clients to synchronously wait for systemd to reexec by - * simply waiting for disconnection */ - - SET_FOREACH(c, m->bus_connections_for_dispatch, i) { - int fd; - - if (dbus_connection_get_unix_fd(c, &fd)) { - fd = fdset_put_dup(fds, fd); - - if (fd < 0) - return fd; - } - } - - SET_FOREACH(c, m->bus_connections, i) { - int fd; - - if (dbus_connection_get_unix_fd(c, &fd)) { - fd = fdset_put_dup(fds, fd); - - if (fd < 0) - return fd; - } - } - - return 0; -} - -void bus_broadcast_finished( - Manager *m, - usec_t kernel_usec, - usec_t initrd_usec, - usec_t userspace_usec, - usec_t total_usec) { - - DBusMessage *message; - - assert(m); - - message = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartupFinished"); - if (!message) { - log_error("Out of memory."); - return; - } - - assert_cc(sizeof(usec_t) == sizeof(uint64_t)); - if (!dbus_message_append_args(message, - DBUS_TYPE_UINT64, &kernel_usec, - DBUS_TYPE_UINT64, &initrd_usec, - DBUS_TYPE_UINT64, &userspace_usec, - DBUS_TYPE_UINT64, &total_usec, - DBUS_TYPE_INVALID)) { - log_error("Out of memory."); - goto finish; - } - - - if (bus_broadcast(m, message) < 0) { - log_error("Out of memory."); - goto finish; - } - -finish: - if (message) - dbus_message_unref(message); -} |