| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| This file is part of systemd. |
| |
| Copyright 2013 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 "dbus-unit.h" |
| #include "dbus-common.h" |
| #include "dbus-cgroup.h" |
| #include "dbus-kill.h" |
| #include "selinux-access.h" |
| #include "dbus-scope.h" |
| |
| #define BUS_SCOPE_INTERFACE \ |
| " <interface name=\"org.freedesktop.systemd1.Scope\">\n" \ |
| " <method name=\"Abandon\"/>\n" \ |
| BUS_UNIT_CGROUP_INTERFACE \ |
| " <property name=\"Controller\" type=\"s\" access=\"read\"/>\n"\ |
| " <property name=\"TimeoutStopUSec\" type=\"t\" access=\"read\"/>\n" \ |
| BUS_KILL_CONTEXT_INTERFACE \ |
| BUS_CGROUP_CONTEXT_INTERFACE \ |
| " <property name=\"Result\" type=\"s\" access=\"read\"/>\n" \ |
| " <signal name=\"RequestStop\"/>\n" \ |
| " </interface>\n" |
| |
| #define INTROSPECTION \ |
| DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \ |
| "<node>\n" \ |
| BUS_UNIT_INTERFACE \ |
| BUS_SCOPE_INTERFACE \ |
| BUS_PROPERTIES_INTERFACE \ |
| BUS_PEER_INTERFACE \ |
| BUS_INTROSPECTABLE_INTERFACE \ |
| "</node>\n" |
| |
| #define INTERFACES_LIST \ |
| BUS_UNIT_INTERFACES_LIST \ |
| "org.freedesktop.systemd1.Scope\0" |
| |
| const char bus_scope_interface[] _introspect_("Scope") = BUS_SCOPE_INTERFACE; |
| |
| static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_scope_append_scope_result, scope_result, ScopeResult); |
| |
| static const BusProperty bus_scope_properties[] = { |
| { "Controller", bus_property_append_string, "s", offsetof(Scope, controller) }, |
| { "TimeoutStopUSec", bus_property_append_usec, "t", offsetof(Scope, timeout_stop_usec) }, |
| { "Result", bus_scope_append_scope_result, "s", offsetof(Scope, result) }, |
| {} |
| }; |
| |
| DBusHandlerResult bus_scope_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) { |
| Scope *s = SCOPE(u); |
| _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; |
| |
| SELINUX_UNIT_ACCESS_CHECK(u, c, message, "status"); |
| |
| if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Scope", "Abandon")) { |
| int r; |
| |
| r = scope_abandon(s); |
| if (r < 0) |
| log_debug("Failed to mark scope %s as abandoned : Scope is not running", UNIT(s)->id); |
| |
| reply = dbus_message_new_method_return(message); |
| if (!reply) |
| goto oom; |
| } else { |
| const BusBoundProperties bps[] = { |
| { "org.freedesktop.systemd1.Unit", bus_unit_properties, u }, |
| { "org.freedesktop.systemd1.Scope", bus_unit_cgroup_properties, u }, |
| { "org.freedesktop.systemd1.Scope", bus_scope_properties, s }, |
| { "org.freedesktop.systemd1.Scope", bus_cgroup_context_properties, &s->cgroup_context }, |
| { "org.freedesktop.systemd1.Scope", bus_kill_context_properties, &s->kill_context }, |
| {} |
| }; |
| |
| return bus_default_message_handler(c, message, INTROSPECTION, INTERFACES_LIST, bps); |
| } |
| |
| if (reply) |
| if (!bus_maybe_send_reply(c, message, reply)) |
| goto oom; |
| |
| return DBUS_HANDLER_RESULT_HANDLED; |
| oom: |
| return DBUS_HANDLER_RESULT_NEED_MEMORY; |
| } |
| |
| static int bus_scope_set_transient_property( |
| Scope *s, |
| const char *name, |
| DBusMessageIter *i, |
| UnitSetPropertiesMode mode, |
| DBusError *error) { |
| |
| int r; |
| |
| assert(name); |
| assert(s); |
| assert(i); |
| |
| if (streq(name, "PIDs")) { |
| DBusMessageIter sub; |
| unsigned n = 0; |
| |
| if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_ARRAY || |
| dbus_message_iter_get_element_type(i) != DBUS_TYPE_UINT32) |
| return -EINVAL; |
| |
| dbus_message_iter_recurse(i, &sub); |
| while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32) { |
| uint32_t pid; |
| |
| dbus_message_iter_get_basic(&sub, &pid); |
| |
| if (pid <= 1) |
| return -EINVAL; |
| |
| if (mode != UNIT_CHECK) { |
| r = unit_watch_pid(UNIT(s), pid); |
| if (r < 0 && r != -EEXIST) |
| return r; |
| } |
| |
| dbus_message_iter_next(&sub); |
| n++; |
| } |
| |
| if (n <= 0) |
| return -EINVAL; |
| |
| return 1; |
| |
| } else if (streq(name, "Controller")) { |
| const char *controller; |
| |
| if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_STRING) |
| return -EINVAL; |
| |
| dbus_message_iter_get_basic(i, &controller); |
| |
| if (!isempty(controller) && !bus_service_name_is_valid(controller)) |
| return -EINVAL; |
| |
| if (mode != UNIT_CHECK) { |
| char *c = NULL; |
| |
| if (!isempty(controller)) { |
| c = strdup(controller); |
| if (!c) |
| return -ENOMEM; |
| } |
| |
| free(s->controller); |
| s->controller = c; |
| } |
| |
| return 1; |
| } else if (streq(name, "TimeoutStopUSec")) { |
| |
| if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_UINT64) |
| return -EINVAL; |
| |
| if (mode != UNIT_CHECK) { |
| uint64_t t; |
| |
| dbus_message_iter_get_basic(i, &t); |
| |
| s->timeout_stop_usec = t; |
| |
| unit_write_drop_in_format(UNIT(s), mode, name, "[Scope]\nTimeoutStopSec=%lluus\n", (unsigned long long) t); |
| } |
| |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| int bus_scope_set_property( |
| Unit *u, |
| const char *name, |
| DBusMessageIter *i, |
| UnitSetPropertiesMode mode, |
| DBusError *error) { |
| |
| Scope *s = SCOPE(u); |
| int r; |
| |
| assert(name); |
| assert(u); |
| assert(i); |
| |
| r = bus_cgroup_set_property(u, &s->cgroup_context, name, i, mode, error); |
| if (r != 0) |
| return r; |
| |
| if (u->load_state == UNIT_STUB) { |
| /* While we are created we still accept PIDs */ |
| |
| r = bus_scope_set_transient_property(s, name, i, mode, error); |
| if (r != 0) |
| return r; |
| |
| r = bus_kill_context_set_transient_property(u, &s->kill_context, name, i, mode, error); |
| if (r != 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| int bus_scope_commit_properties(Unit *u) { |
| assert(u); |
| |
| unit_realize_cgroup(u); |
| return 0; |
| } |
| |
| int bus_scope_send_request_stop(Scope *s) { |
| _cleanup_dbus_message_unref_ DBusMessage *m = NULL; |
| _cleanup_free_ char *p = NULL; |
| int r; |
| |
| assert(s); |
| |
| if (!s->controller) |
| return 0; |
| |
| p = unit_dbus_path(UNIT(s)); |
| if (!p) |
| return -ENOMEM; |
| |
| m = dbus_message_new_signal(p, |
| "org.freedesktop.systemd1.Scope", |
| "RequestStop"); |
| if (!m) |
| return 0; |
| |
| r = dbus_message_set_destination(m, s->controller); |
| if (!r) |
| return 0; |
| |
| return dbus_connection_send(UNIT(s)->manager->api_bus, m, NULL); |
| } |