diff options
Diffstat (limited to 'src/core/dbus-job.c')
| -rw-r--r-- | src/core/dbus-job.c | 371 |
1 files changed, 371 insertions, 0 deletions
diff --git a/src/core/dbus-job.c b/src/core/dbus-job.c new file mode 100644 index 0000000..9792a5c --- /dev/null +++ b/src/core/dbus-job.c @@ -0,0 +1,371 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include "sd-bus.h" + +#include "alloc-util.h" +#include "bus-get-properties.h" +#include "bus-util.h" +#include "dbus-job.h" +#include "dbus-unit.h" +#include "dbus-util.h" +#include "dbus.h" +#include "job.h" +#include "log.h" +#include "selinux-access.h" +#include "string-util.h" +#include "strv.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 = ASSERT_PTR(userdata); + + assert(bus); + assert(reply); + + 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 = ASSERT_PTR(userdata); + int r; + + assert(message); + + 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, 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 (int 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_WITH_ARGS("GetAfter", + SD_BUS_NO_ARGS, + SD_BUS_RESULT("a(usssoo)", jobs), + bus_job_method_get_waiting_jobs, + SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD_WITH_ARGS("GetBefore", + SD_BUS_NO_ARGS, + SD_BUS_RESULT("a(usssoo)", jobs), + 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_PROPERTY("ActivationDetails", "a(ss)", bus_property_get_activation_details, offsetof(Job, activation_details), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_VTABLE_END +}; + +static int bus_job_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { + Manager *m = ASSERT_PTR(userdata); + Job *j; + int r; + + assert(bus); + assert(path); + assert(interface); + assert(found); + + r = manager_get_job_from_dbus_path(m, path, &j); + if (r < 0) + return 0; + + *found = j; + return 1; +} + +static int bus_job_enumerate(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { + _cleanup_strv_free_ char **l = NULL; + Manager *m = userdata; + unsigned k = 0; + Job *j; + + l = new0(char*, hashmap_size(m->jobs)+1); + if (!l) + return -ENOMEM; + + HASHMAP_FOREACH(j, m->jobs) { + l[k] = job_dbus_path(j); + if (!l[k]) + return -ENOMEM; + + k++; + } + + assert(hashmap_size(m->jobs) == k); + + *nodes = TAKE_PTR(l); + + return k; +} + +const BusObjectImplementation job_object = { + "/org/freedesktop/systemd1/job", + "org.freedesktop.systemd1.Job", + .fallback_vtables = BUS_FALLBACK_VTABLES({bus_job_vtable, bus_job_find}), + .node_enumerator = bus_job_enumerate, +}; + +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 = ASSERT_PTR(userdata); + int r; + + assert(bus); + + 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 = ASSERT_PTR(userdata); + + assert(bus); + + 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 = ASSERT_PTR(userdata); + int r; + + assert(bus); + + 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 = ASSERT_PTR(userdata); + + assert(t); + + 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; + _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); +} |