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-rw-r--r--src/core/dbus-job.c312
1 files changed, 312 insertions, 0 deletions
diff --git a/src/core/dbus-job.c b/src/core/dbus-job.c
new file mode 100644
index 0000000..d11e58b
--- /dev/null
+++ b/src/core/dbus-job.c
@@ -0,0 +1,312 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include "sd-bus.h"
+
+#include "alloc-util.h"
+#include "dbus-job.h"
+#include "dbus-unit.h"
+#include "dbus.h"
+#include "job.h"
+#include "log.h"
+#include "selinux-access.h"
+#include "string-util.h"
+
+static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, job_type, JobType);
+static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_state, job_state, JobState);
+
+static int property_get_unit(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ _cleanup_free_ char *p = NULL;
+ Job *j = userdata;
+
+ assert(bus);
+ assert(reply);
+ assert(j);
+
+ p = unit_dbus_path(j->unit);
+ if (!p)
+ return -ENOMEM;
+
+ return sd_bus_message_append(reply, "(so)", j->unit->id, p);
+}
+
+int bus_job_method_cancel(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ Job *j = userdata;
+ int r;
+
+ assert(message);
+ assert(j);
+
+ r = mac_selinux_unit_access_check(j->unit, message, "stop", error);
+ if (r < 0)
+ return r;
+
+ /* Access is granted to the job owner */
+ if (!sd_bus_track_contains(j->bus_track, sd_bus_message_get_sender(message))) {
+
+ /* And for everybody else consult polkit */
+ r = bus_verify_manage_units_async(j->unit->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 */
+ }
+
+ job_finish_and_invalidate(j, JOB_CANCELED, true, false);
+
+ return sd_bus_reply_method_return(message, NULL);
+}
+
+int bus_job_method_get_waiting_jobs(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+ _cleanup_free_ Job **list = NULL;
+ Job *j = userdata;
+ int r, i, n;
+
+ if (strstr(sd_bus_message_get_member(message), "After"))
+ n = job_get_after(j, &list);
+ else
+ n = job_get_before(j, &list);
+ if (n < 0)
+ return n;
+
+ r = sd_bus_message_new_method_return(message, &reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(reply, 'a', "(usssoo)");
+ if (r < 0)
+ return r;
+
+ for (i = 0; i < n; i ++) {
+ _cleanup_free_ char *unit_path = NULL, *job_path = NULL;
+
+ job_path = job_dbus_path(list[i]);
+ if (!job_path)
+ return -ENOMEM;
+
+ unit_path = unit_dbus_path(list[i]->unit);
+ if (!unit_path)
+ return -ENOMEM;
+
+ r = sd_bus_message_append(reply, "(usssoo)",
+ list[i]->id,
+ list[i]->unit->id,
+ job_type_to_string(list[i]->type),
+ job_state_to_string(list[i]->state),
+ job_path,
+ unit_path);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
+
+ return sd_bus_send(NULL, reply, NULL);
+}
+
+const sd_bus_vtable bus_job_vtable[] = {
+ SD_BUS_VTABLE_START(0),
+ SD_BUS_METHOD("Cancel", NULL, NULL, bus_job_method_cancel, SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD("GetAfter", NULL, "a(usssoo)", bus_job_method_get_waiting_jobs, SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD("GetBefore", NULL, "a(usssoo)", bus_job_method_get_waiting_jobs, SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_PROPERTY("Id", "u", NULL, offsetof(Job, id), SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("Unit", "(so)", property_get_unit, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("JobType", "s", property_get_type, offsetof(Job, type), SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("State", "s", property_get_state, offsetof(Job, state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+ SD_BUS_VTABLE_END
+};
+
+static int send_new_signal(sd_bus *bus, void *userdata) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
+ _cleanup_free_ char *p = NULL;
+ Job *j = userdata;
+ int r;
+
+ assert(bus);
+ assert(j);
+
+ p = job_dbus_path(j);
+ if (!p)
+ return -ENOMEM;
+
+ r = sd_bus_message_new_signal(
+ bus,
+ &m,
+ "/org/freedesktop/systemd1",
+ "org.freedesktop.systemd1.Manager",
+ "JobNew");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(m, "uos", j->id, p, j->unit->id);
+ if (r < 0)
+ return r;
+
+ return sd_bus_send(bus, m, NULL);
+}
+
+static int send_changed_signal(sd_bus *bus, void *userdata) {
+ _cleanup_free_ char *p = NULL;
+ Job *j = userdata;
+
+ assert(bus);
+ assert(j);
+
+ p = job_dbus_path(j);
+ if (!p)
+ return -ENOMEM;
+
+ return sd_bus_emit_properties_changed(bus, p, "org.freedesktop.systemd1.Job", "State", NULL);
+}
+
+void bus_job_send_change_signal(Job *j) {
+ int r;
+
+ assert(j);
+
+ /* Make sure that any change signal on the unit is reflected before we send out the change signal on the job */
+ bus_unit_send_pending_change_signal(j->unit, true);
+
+ if (j->in_dbus_queue) {
+ LIST_REMOVE(dbus_queue, j->manager->dbus_job_queue, j);
+ j->in_dbus_queue = false;
+ }
+
+ r = bus_foreach_bus(j->manager, j->bus_track, j->sent_dbus_new_signal ? send_changed_signal : send_new_signal, j);
+ if (r < 0)
+ log_debug_errno(r, "Failed to send job change signal for %u: %m", j->id);
+
+ j->sent_dbus_new_signal = true;
+}
+
+void bus_job_send_pending_change_signal(Job *j, bool including_new) {
+ assert(j);
+
+ if (!j->in_dbus_queue)
+ return;
+
+ if (!j->sent_dbus_new_signal && !including_new)
+ return;
+
+ if (MANAGER_IS_RELOADING(j->unit->manager))
+ return;
+
+ bus_job_send_change_signal(j);
+}
+
+static int send_removed_signal(sd_bus *bus, void *userdata) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
+ _cleanup_free_ char *p = NULL;
+ Job *j = userdata;
+ int r;
+
+ assert(bus);
+ assert(j);
+
+ p = job_dbus_path(j);
+ if (!p)
+ return -ENOMEM;
+
+ r = sd_bus_message_new_signal(
+ bus,
+ &m,
+ "/org/freedesktop/systemd1",
+ "org.freedesktop.systemd1.Manager",
+ "JobRemoved");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(m, "uoss", j->id, p, j->unit->id, job_result_to_string(j->result));
+ if (r < 0)
+ return r;
+
+ return sd_bus_send(bus, m, NULL);
+}
+
+void bus_job_send_removed_signal(Job *j) {
+ int r;
+
+ assert(j);
+
+ if (!j->sent_dbus_new_signal)
+ bus_job_send_change_signal(j);
+
+ /* Make sure that any change signal on the unit is reflected before we send out the change signal on the job */
+ bus_unit_send_pending_change_signal(j->unit, true);
+
+ r = bus_foreach_bus(j->manager, j->bus_track, send_removed_signal, j);
+ if (r < 0)
+ log_debug_errno(r, "Failed to send job remove signal for %u: %m", j->id);
+}
+
+static int bus_job_track_handler(sd_bus_track *t, void *userdata) {
+ Job *j = userdata;
+
+ assert(t);
+ assert(j);
+
+ j->bus_track = sd_bus_track_unref(j->bus_track); /* make sure we aren't called again */
+
+ /* Last client dropped off the bus, maybe we should GC this now? */
+ job_add_to_gc_queue(j);
+ return 0;
+}
+
+static int bus_job_allocate_bus_track(Job *j) {
+
+ assert(j);
+
+ if (j->bus_track)
+ return 0;
+
+ return sd_bus_track_new(j->unit->manager->api_bus, &j->bus_track, bus_job_track_handler, j);
+}
+
+int bus_job_coldplug_bus_track(Job *j) {
+ int r = 0;
+ _cleanup_strv_free_ char **deserialized_clients = NULL;
+
+ assert(j);
+
+ deserialized_clients = TAKE_PTR(j->deserialized_clients);
+
+ if (strv_isempty(deserialized_clients))
+ return 0;
+
+ if (!j->manager->api_bus)
+ return 0;
+
+ r = bus_job_allocate_bus_track(j);
+ if (r < 0)
+ return r;
+
+ return bus_track_add_name_many(j->bus_track, deserialized_clients);
+}
+
+int bus_job_track_sender(Job *j, sd_bus_message *m) {
+ int r;
+
+ assert(j);
+ assert(m);
+
+ if (sd_bus_message_get_bus(m) != j->unit->manager->api_bus) {
+ j->ref_by_private_bus = true;
+ return 0;
+ }
+
+ r = bus_job_allocate_bus_track(j);
+ if (r < 0)
+ return r;
+
+ return sd_bus_track_add_sender(j->bus_track, m);
+}