Adding upstream version 252.22.upstream/252.22

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 274 insertions, 0 deletions

diff --git a/src/core/dbus-scope.c b/src/core/dbus-scope.c
new file mode 100644
index 0000000..7b07bb8
--- /dev/null
+++ b/src/core/dbus-scope.c
@@ -0,0 +1,274 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "alloc-util.h"
+#include "bus-common-errors.h"
+#include "bus-get-properties.h"
+#include "dbus-cgroup.h"
+#include "dbus-kill.h"
+#include "dbus-manager.h"
+#include "dbus-scope.h"
+#include "dbus-unit.h"
+#include "dbus-util.h"
+#include "dbus.h"
+#include "scope.h"
+#include "selinux-access.h"
+#include "unit.h"
+
+int bus_scope_method_abandon(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+        Scope *s = ASSERT_PTR(userdata);
+        int r;
+
+        assert(message);
+
+        r = mac_selinux_unit_access_check(UNIT(s), message, "stop", error);
+        if (r < 0)
+                return r;
+
+        r = bus_verify_manage_units_async(UNIT(s)->manager, message, error);
+        if (r < 0)
+                return r;
+        if (r == 0)
+                return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
+
+        r = scope_abandon(s);
+        if (r == -ESTALE)
+                return sd_bus_error_setf(error, BUS_ERROR_SCOPE_NOT_RUNNING, "Scope %s is not running, cannot abandon.", UNIT(s)->id);
+        if (r < 0)
+                return r;
+
+        return sd_bus_reply_method_return(message, NULL);
+}
+
+static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, scope_result, ScopeResult);
+static BUS_DEFINE_SET_TRANSIENT_PARSE(oom_policy, OOMPolicy, oom_policy_from_string);
+
+const sd_bus_vtable bus_scope_vtable[] = {
+        SD_BUS_VTABLE_START(0),
+        SD_BUS_PROPERTY("Controller", "s", NULL, offsetof(Scope, controller), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("TimeoutStopUSec", "t", bus_property_get_usec, offsetof(Scope, timeout_stop_usec), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Scope, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("RuntimeMaxUSec", "t", bus_property_get_usec, offsetof(Scope, runtime_max_usec), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("RuntimeRandomizedExtraUSec", "t", bus_property_get_usec, offsetof(Scope, runtime_rand_extra_usec), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("OOMPolicy", "s", bus_property_get_oom_policy, offsetof(Scope, oom_policy), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_SIGNAL("RequestStop", NULL, 0),
+        SD_BUS_METHOD("Abandon", NULL, NULL, bus_scope_method_abandon, SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_VTABLE_END
+};
+
+static int bus_scope_set_transient_property(
+                Scope *s,
+                const char *name,
+                sd_bus_message *message,
+                UnitWriteFlags flags,
+                sd_bus_error *error) {
+
+        Unit *u = UNIT(s);
+        int r;
+
+        assert(s);
+        assert(name);
+        assert(message);
+
+        flags |= UNIT_PRIVATE;
+
+        if (streq(name, "TimeoutStopUSec"))
+                return bus_set_transient_usec(u, name, &s->timeout_stop_usec, message, flags, error);
+
+        if (streq(name, "RuntimeMaxUSec"))
+                return bus_set_transient_usec(u, name, &s->runtime_max_usec, message, flags, error);
+
+        if (streq(name, "RuntimeRandomizedExtraUSec"))
+                return bus_set_transient_usec(u, name, &s->runtime_rand_extra_usec, message, flags, error);
+
+        if (streq(name, "OOMPolicy"))
+                return bus_set_transient_oom_policy(u, name, &s->oom_policy, message, flags, error);
+
+        if (streq(name, "PIDs")) {
+                _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
+                unsigned n = 0;
+
+                r = sd_bus_message_enter_container(message, 'a', "u");
+                if (r < 0)
+                        return r;
+
+                for (;;) {
+                        uint32_t upid;
+                        pid_t pid;
+
+                        r = sd_bus_message_read(message, "u", &upid);
+                        if (r < 0)
+                                return r;
+                        if (r == 0)
+                                break;
+
+                        if (upid == 0) {
+                                if (!creds) {
+                                        r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
+                                        if (r < 0)
+                                                return r;
+                                }
+
+                                r = sd_bus_creds_get_pid(creds, &pid);
+                                if (r < 0)
+                                        return r;
+                        } else
+                                pid = (uid_t) upid;
+
+                        r = unit_pid_attachable(u, pid, error);
+                        if (r < 0)
+                                return r;
+
+                        if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
+                                r = unit_watch_pid(u, pid, false);
+                                if (r < 0 && r != -EEXIST)
+                                        return r;
+                        }
+
+                        n++;
+                }
+
+                r = sd_bus_message_exit_container(message);
+                if (r < 0)
+                        return r;
+
+                if (n <= 0)
+                        return -EINVAL;
+
+                return 1;
+
+        } else if (streq(name, "Controller")) {
+                const char *controller;
+
+                /* We can't support direct connections with this, as direct connections know no service or unique name
+                 * concept, but the Controller field stores exactly that. */
+                if (sd_bus_message_get_bus(message) != u->manager->api_bus)
+                        return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Sorry, Controller= logic only supported via the bus.");
+
+                r = sd_bus_message_read(message, "s", &controller);
+                if (r < 0)
+                        return r;
+
+                if (!isempty(controller) && !sd_bus_service_name_is_valid(controller))
+                        return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Controller '%s' is not a valid bus name.", controller);
+
+                if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
+                        r = free_and_strdup(&s->controller, empty_to_null(controller));
+                        if (r < 0)
+                                return r;
+                }
+
+                return 1;
+        }
+
+        return 0;
+}
+
+int bus_scope_set_property(
+                Unit *u,
+                const char *name,
+                sd_bus_message *message,
+                UnitWriteFlags flags,
+                sd_bus_error *error) {
+
+        Scope *s = SCOPE(u);
+        int r;
+
+        assert(s);
+        assert(name);
+        assert(message);
+
+        r = bus_cgroup_set_property(u, &s->cgroup_context, name, message, flags, 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, message, flags, error);
+                if (r != 0)
+                        return r;
+
+                r = bus_kill_context_set_transient_property(u, &s->kill_context, name, message, flags, error);
+                if (r != 0)
+                        return r;
+
+                if (streq(name, "User"))
+                        return bus_set_transient_user_relaxed(u, name, &s->user, message, flags, error);
+
+                if (streq(name, "Group"))
+                        return bus_set_transient_user_relaxed(u, name, &s->group, message, flags, error);
+        }
+
+        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_(sd_bus_message_unrefp) sd_bus_message *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;
+
+        r = sd_bus_message_new_signal(
+                        UNIT(s)->manager->api_bus,
+                        &m,
+                        p,
+                        "org.freedesktop.systemd1.Scope",
+                        "RequestStop");
+        if (r < 0)
+                return r;
+
+        return sd_bus_send_to(UNIT(s)->manager->api_bus, m, s->controller, NULL);
+}
+
+static int on_controller_gone(sd_bus_track *track, void *userdata) {
+        Scope *s = userdata;
+
+        assert(track);
+
+        if (s->controller) {
+                log_unit_debug(UNIT(s), "Controller %s disappeared from bus.", s->controller);
+                unit_add_to_dbus_queue(UNIT(s));
+                s->controller = mfree(s->controller);
+        }
+
+        s->controller_track = sd_bus_track_unref(s->controller_track);
+
+        return 0;
+}
+
+int bus_scope_track_controller(Scope *s) {
+        int r;
+
+        assert(s);
+
+        if (!s->controller || s->controller_track)
+                return 0;
+
+        r = sd_bus_track_new(UNIT(s)->manager->api_bus, &s->controller_track, on_controller_gone, s);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_track_add_name(s->controller_track, s->controller);
+        if (r < 0) {
+                s->controller_track = sd_bus_track_unref(s->controller_track);
+                return r;
+        }
+
+        return 0;
+}