cgroup: export list of delegatable control files using sysfs

	return ret;

}

#endif /* CONFIG_CGROUP_BPF */

#ifdef CONFIG_SYSFS

static ssize_t show_delegatable_files(struct cftype *files, char *buf,

				      ssize_t size, const char *prefix)

{

	struct cftype *cft;

	ssize_t ret = 0;

	for (cft = files; cft && cft->name[0] != '\0'; cft++) {

		if (!(cft->flags & CFTYPE_NS_DELEGATABLE))

			continue;

		if (prefix)

			ret += snprintf(buf + ret, size - ret, "%s.", prefix);

		ret += snprintf(buf + ret, size - ret, "%s\n", cft->name);

		if (unlikely(ret >= size)) {

			WARN_ON(1);

			break;

		}

	}

	return ret;

}

static ssize_t delegate_show(struct kobject *kobj, struct kobj_attribute *attr,

			      char *buf)

{

	struct cgroup_subsys *ss;

	int ssid;

	ssize_t ret = 0;

	ret = show_delegatable_files(cgroup_base_files, buf, PAGE_SIZE - ret,

				     NULL);

	for_each_subsys(ss, ssid)

		ret += show_delegatable_files(ss->dfl_cftypes, buf + ret,

					      PAGE_SIZE - ret,

					      cgroup_subsys_name[ssid]);

	return ret;

}

static struct kobj_attribute cgroup_delegate_attr = __ATTR_RO(delegate);

static struct attribute *cgroup_sysfs_attrs[] = {

	&cgroup_delegate_attr.attr,

	NULL,

};

static const struct attribute_group cgroup_sysfs_attr_group = {

	.attrs = cgroup_sysfs_attrs,

	.name = "cgroup",

};

static int __init cgroup_sysfs_init(void)

{

	return sysfs_create_group(kernel_kobj, &cgroup_sysfs_attr_group);

}

subsys_initcall(cgroup_sysfs_init);

#endif /* CONFIG_SYSFS */