return 0;
}
-static int bus_unit_append_default_cgroup(DBusMessageIter *i, const char *property, void *data) {
- Unit *u = data;
- char *t;
- CGroupBonding *cgb;
- bool success;
-
- assert(i);
- assert(property);
- assert(u);
-
- cgb = unit_get_default_cgroup(u);
- if (cgb) {
- t = cgroup_bonding_to_string(cgb);
- if (!t)
- return -ENOMEM;
- } else
- t = (char*) "";
-
- success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t);
-
- if (cgb)
- free(t);
-
- return success ? 0 : -ENOMEM;
-}
-
-static int bus_unit_append_cgroups(DBusMessageIter *i, const char *property, void *data) {
- Unit *u = data;
- CGroupBonding *cgb;
- DBusMessageIter sub;
-
- if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
- return -ENOMEM;
-
- LIST_FOREACH(by_unit, cgb, u->cgroup_bondings) {
- _cleanup_free_ char *t = NULL;
- bool success;
-
- t = cgroup_bonding_to_string(cgb);
- if (!t)
- return -ENOMEM;
-
- success = dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t);
- if (!success)
- return -ENOMEM;
- }
-
- if (!dbus_message_iter_close_container(i, &sub))
- return -ENOMEM;
-
- return 0;
-}
-
-static int bus_unit_append_cgroup_attrs(DBusMessageIter *i, const char *property, void *data) {
- Unit *u = data;
- CGroupAttribute *a;
- DBusMessageIter sub, sub2;
-
- if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(sss)", &sub))
- return -ENOMEM;
-
- LIST_FOREACH(by_unit, a, u->cgroup_attributes) {
- _cleanup_free_ char *v = NULL;
- bool success;
-
- if (a->semantics && a->semantics->map_write)
- a->semantics->map_write(a->semantics, a->value, &v);
-
- success =
- dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) &&
- dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &a->controller) &&
- dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &a->name) &&
- dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, v ? &v : &a->value) &&
- dbus_message_iter_close_container(&sub, &sub2);
- if (!success)
- return -ENOMEM;
- }
-
- if (!dbus_message_iter_close_container(i, &sub))
- return -ENOMEM;
-
- return 0;
-}
-
static int bus_unit_append_need_daemon_reload(DBusMessageIter *i, const char *property, void *data) {
Unit *u = data;
dbus_bool_t b;
if (!reply)
goto oom;
- } else if (streq_ptr(dbus_message_get_member(message), "SetControlGroup")) {
- DBusMessageIter iter;
-
- SELINUX_UNIT_ACCESS_CHECK(u, connection, message, "start");
-
- if (!dbus_message_iter_init(message, &iter))
- goto oom;
-
- r = bus_unit_cgroup_set(u, &iter);
- if (r < 0)
- return bus_send_error_reply(connection, message, NULL, r);
-
- reply = dbus_message_new_method_return(message);
- if (!reply)
- goto oom;
-
- } else if (streq_ptr(dbus_message_get_member(message), "UnsetControlGroup")) {
- DBusMessageIter iter;
-
- SELINUX_UNIT_ACCESS_CHECK(u, connection, message, "stop");
-
- if (!dbus_message_iter_init(message, &iter))
- goto oom;
-
- r = bus_unit_cgroup_unset(u, &iter);
- if (r < 0)
- return bus_send_error_reply(connection, message, NULL, r);
-
- reply = dbus_message_new_method_return(message);
- if (!reply)
- goto oom;
- } else if (streq_ptr(dbus_message_get_member(message), "GetControlGroupAttribute")) {
- DBusMessageIter iter;
- _cleanup_strv_free_ char **list = NULL;
-
- SELINUX_UNIT_ACCESS_CHECK(u, connection, message, "status");
-
- if (!dbus_message_iter_init(message, &iter))
- goto oom;
-
- r = bus_unit_cgroup_attribute_get(u, &iter, &list);
- if (r < 0)
- return bus_send_error_reply(connection, message, NULL, r);
-
- reply = dbus_message_new_method_return(message);
- if (!reply)
- goto oom;
-
- dbus_message_iter_init_append(reply, &iter);
- if (bus_append_strv_iter(&iter, list) < 0)
- goto oom;
-
- } else if (streq_ptr(dbus_message_get_member(message), "SetControlGroupAttribute")) {
- DBusMessageIter iter;
-
- SELINUX_UNIT_ACCESS_CHECK(u, connection, message, "start");
-
- if (!dbus_message_iter_init(message, &iter))
- goto oom;
-
- r = bus_unit_cgroup_attribute_set(u, &iter);
- if (r < 0)
- return bus_send_error_reply(connection, message, NULL, r);
-
- reply = dbus_message_new_method_return(message);
- if (!reply)
- goto oom;
-
- } else if (streq_ptr(dbus_message_get_member(message), "UnsetControlGroupAttribute")) {
- DBusMessageIter iter;
-
- SELINUX_UNIT_ACCESS_CHECK(u, connection, message, "stop");
-
- if (!dbus_message_iter_init(message, &iter))
- goto oom;
-
- r = bus_unit_cgroup_attribute_unset(u, &iter);
- if (r < 0)
- return bus_send_error_reply(connection, message, NULL, r);
-
- reply = dbus_message_new_method_return(message);
- if (!reply)
- goto oom;
-
} else if (UNIT_VTABLE(u)->bus_message_handler)
return UNIT_VTABLE(u)->bus_message_handler(u, connection, message);
else
return DBUS_HANDLER_RESULT_NEED_MEMORY;
}
-static int parse_mode(DBusMessageIter *iter, bool *runtime, bool next) {
- const char *mode;
- int r;
-
- assert(iter);
- assert(runtime);
-
- r = bus_iter_get_basic_and_next(iter, DBUS_TYPE_STRING, &mode, next);
- if (r < 0)
- return r;
-
- if (streq(mode, "runtime"))
- *runtime = true;
- else if (streq(mode, "persistent"))
- *runtime = false;
- else
- return -EINVAL;
-
- return 0;
-}
-
-int bus_unit_cgroup_set(Unit *u, DBusMessageIter *iter) {
- _cleanup_free_ char *controller = NULL, *old_path = NULL, *new_path = NULL, *contents = NULL;
- const char *name;
- CGroupBonding *b;
- bool runtime;
- int r;
-
- assert(u);
- assert(iter);
-
- if (!unit_get_exec_context(u))
- return -EINVAL;
-
- r = bus_iter_get_basic_and_next(iter, DBUS_TYPE_STRING, &name, true);
- if (r < 0)
- return r;
-
- r = parse_mode(iter, &runtime, false);
- if (r < 0)
- return r;
-
- r = cg_split_spec(name, &controller, &new_path);
- if (r < 0)
- return r;
-
- if (!new_path) {
- new_path = unit_default_cgroup_path(u);
- if (!new_path)
- return -ENOMEM;
- }
-
- if (!controller || streq(controller, SYSTEMD_CGROUP_CONTROLLER))
- return -EINVAL;
-
- b = cgroup_bonding_find_list(u->cgroup_bondings, controller);
- if (b) {
- if (streq(b->path, new_path))
- return 0;
-
- if (b->essential)
- return -EINVAL;
-
- old_path = strdup(b->path);
- if (!old_path)
- return -ENOMEM;
- }
-
- r = unit_add_cgroup_from_text(u, name, true, &b);
- if (r < 0)
- return r;
- if (r > 0) {
- CGroupAttribute *a;
-
- /* Try to move things to the new place, and clean up the old place */
- cgroup_bonding_realize(b);
- cgroup_bonding_migrate(b, u->cgroup_bondings);
-
- if (old_path)
- cg_trim(controller, old_path, true);
-
- /* Apply the attributes to the new group */
- LIST_FOREACH(by_unit, a, u->cgroup_attributes)
- if (streq(a->controller, controller))
- cgroup_attribute_apply(a, b);
- }
-
- contents = strjoin("[", UNIT_VTABLE(u)->exec_section, "]\n"
- "ControlGroup=", name, "\n", NULL);
- if (!contents)
- return -ENOMEM;
-
- return unit_write_drop_in(u, runtime, controller, contents);
-}
-
-int bus_unit_cgroup_unset(Unit *u, DBusMessageIter *iter) {
- _cleanup_free_ char *controller = NULL, *path = NULL, *target = NULL;
- const char *name;
- CGroupAttribute *a, *n;
- CGroupBonding *b;
- bool runtime;
- int r;
-
- assert(u);
- assert(iter);
-
- if (!unit_get_exec_context(u))
- return -EINVAL;
-
- r = bus_iter_get_basic_and_next(iter, DBUS_TYPE_STRING, &name, true);
- if (r < 0)
- return r;
-
- r = parse_mode(iter, &runtime, false);
- if (r < 0)
- return r;
-
- r = cg_split_spec(name, &controller, &path);
- if (r < 0)
- return r;
-
- if (!controller || streq(controller, SYSTEMD_CGROUP_CONTROLLER))
- return -EINVAL;
-
- b = cgroup_bonding_find_list(u->cgroup_bondings, controller);
- if (!b)
- return -ENOENT;
-
- if (path && !path_equal(path, b->path))
- return -ENOENT;
-
- if (b->essential)
- return -EINVAL;
-
- unit_remove_drop_in(u, runtime, controller);
-
- /* Try to migrate the old group away */
- if (cg_pid_get_path(controller, 0, &target) >= 0)
- cgroup_bonding_migrate_to(u->cgroup_bondings, target, false);
-
- cgroup_bonding_free(b, true);
-
- /* Drop all attributes of this controller */
- LIST_FOREACH_SAFE(by_unit, a, n, u->cgroup_attributes) {
- if (!streq(a->controller, controller))
- continue;
-
- unit_remove_drop_in(u, runtime, a->name);
- cgroup_attribute_free(a);
- }
-
- return 0;
-}
-
-int bus_unit_cgroup_attribute_get(Unit *u, DBusMessageIter *iter, char ***_result) {
- _cleanup_free_ char *controller = NULL;
- CGroupAttribute *a;
- CGroupBonding *b;
- const char *name;
- char **l = NULL;
- int r;
-
- assert(u);
- assert(iter);
- assert(_result);
-
- if (!unit_get_exec_context(u))
- return -EINVAL;
-
- r = bus_iter_get_basic_and_next(iter, DBUS_TYPE_STRING, &name, false);
- if (r < 0)
- return r;
-
- r = cg_controller_from_attr(name, &controller);
- if (r < 0)
- return r;
-
- /* First attempt, read the value from the kernel */
- b = cgroup_bonding_find_list(u->cgroup_bondings, controller);
- if (b) {
- _cleanup_free_ char *p = NULL, *v = NULL;
-
- r = cg_get_path(b->controller, b->path, name, &p);
- if (r < 0)
- return r;
-
- r = read_full_file(p, &v, NULL);
- if (r >= 0) {
- /* Split on new lines */
- l = strv_split_newlines(v);
- if (!l)
- return -ENOMEM;
-
- *_result = l;
- return 0;
-
- }
- }
-
- /* If that didn't work, read our cached value */
- LIST_FOREACH(by_unit, a, u->cgroup_attributes) {
-
- if (!cgroup_attribute_matches(a, controller, name))
- continue;
-
- r = strv_extend(&l, a->value);
- if (r < 0) {
- strv_free(l);
- return r;
- }
- }
-
- if (!l)
- return -ENOENT;
-
- *_result = l;
- return 0;
-}
-
-static int update_attribute_drop_in(Unit *u, bool runtime, const char *name) {
- _cleanup_free_ char *buf = NULL;
- CGroupAttribute *a;
-
- assert(u);
- assert(name);
-
- LIST_FOREACH(by_unit, a, u->cgroup_attributes) {
- if (!cgroup_attribute_matches(a, NULL, name))
- continue;
-
- if (!buf) {
- buf = strjoin("[", UNIT_VTABLE(u)->exec_section, "]\n"
- "ControlGroupAttribute=", a->name, " ", a->value, "\n", NULL);
-
- if (!buf)
- return -ENOMEM;
- } else {
- char *b;
-
- b = strjoin(buf,
- "ControlGroupAttribute=", a->name, " ", a->value, "\n", NULL);
-
- if (!b)
- return -ENOMEM;
-
- free(buf);
- buf = b;
- }
- }
-
- if (buf)
- return unit_write_drop_in(u, runtime, name, buf);
- else
- return unit_remove_drop_in(u, runtime, name);
-}
-
-int bus_unit_cgroup_attribute_set(Unit *u, DBusMessageIter *iter) {
- _cleanup_strv_free_ char **l = NULL;
- int r;
- bool runtime = false;
- char **value;
- const char *name;
-
- assert(u);
- assert(iter);
-
- if (!unit_get_exec_context(u))
- return -EINVAL;
-
- r = bus_iter_get_basic_and_next(iter, DBUS_TYPE_STRING, &name, true);
- if (r < 0)
- return r;
-
- r = bus_parse_strv_iter(iter, &l);
- if (r < 0)
- return r;
-
- if (!dbus_message_iter_next(iter))
- return -EINVAL;
-
- r = parse_mode(iter, &runtime, false);
- if (r < 0)
- return r;
-
- STRV_FOREACH(value, l) {
- _cleanup_free_ char *v = NULL;
- CGroupAttribute *a;
- const CGroupSemantics *s;
-
- r = cgroup_semantics_find(NULL, name, *value, &v, &s);
- if (r < 0)
- return r;
-
- if (s && !s->multiple && l[1])
- return -EINVAL;
-
- r = unit_add_cgroup_attribute(u, s, NULL, name, v ? v : *value, &a);
- if (r < 0)
- return r;
-
- if (r > 0) {
- CGroupBonding *b;
-
- b = cgroup_bonding_find_list(u->cgroup_bondings, a->controller);
- if (!b) {
- /* Doesn't exist yet? Then let's add it */
- r = unit_add_cgroup_from_text(u, a->controller, false, &b);
- if (r < 0)
- return r;
-
- if (r > 0) {
- cgroup_bonding_realize(b);
- cgroup_bonding_migrate(b, u->cgroup_bondings);
- }
- }
-
- /* Make it count */
- cgroup_attribute_apply(a, u->cgroup_bondings);
- }
-
- }
-
- r = update_attribute_drop_in(u, runtime, name);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-int bus_unit_cgroup_attribute_unset(Unit *u, DBusMessageIter *iter) {
- const char *name;
- bool runtime;
- int r;
-
- assert(u);
- assert(iter);
-
- if (!unit_get_exec_context(u))
- return -EINVAL;
-
- r = bus_iter_get_basic_and_next(iter, DBUS_TYPE_STRING, &name, true);
- if (r < 0)
- return r;
-
- r = parse_mode(iter, &runtime, false);
- if (r < 0)
- return r;
-
- cgroup_attribute_free_some(u->cgroup_attributes, NULL, name);
- update_attribute_drop_in(u, runtime, name);
-
- return 0;
-}
-
const BusProperty bus_unit_properties[] = {
{ "Id", bus_property_append_string, "s", offsetof(Unit, id), true },
{ "Names", bus_unit_append_names, "as", 0 },
{ "ConditionTimestampMonotonic", bus_property_append_usec, "t", offsetof(Unit, condition_timestamp.monotonic) },
{ "ConditionResult", bus_property_append_bool, "b", offsetof(Unit, condition_result) },
{ "LoadError", bus_unit_append_load_error, "(ss)", 0 },
- { NULL, }
-};
-
-const BusProperty bus_unit_cgroup_properties[] = {
- { "DefaultControlGroup", bus_unit_append_default_cgroup, "s", 0 },
- { "ControlGroups", bus_unit_append_cgroups, "as", 0 },
- { "ControlGroupAttributes", bus_unit_append_cgroup_attrs, "a(sss)", 0 },
+ { "ControlGroup", bus_property_append_string, "s", offsetof(Unit, cgroup_path), true },
{ NULL, }
};
~ianmdlvl / elogind.git / blobdiff