1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright Intel Corp. 2018 */
 3#include <linux/init.h>
 4#include <linux/module.h>
 5#include <linux/moduleparam.h>
 6#include <linux/nd.h>
 7#include "pmem.h"
 8#include "pfn.h"
 9#include "nd.h"
10#include "nd-core.h"
11
12ssize_t security_show(struct device *dev,
13		struct device_attribute *attr, char *buf)
14{
15	struct nvdimm *nvdimm = to_nvdimm(dev);
16
17	/*
18	 * For the test version we need to poll the "hardware" in order
19	 * to get the updated status for unlock testing.
20	 */
21	nvdimm->sec.flags = nvdimm_security_flags(nvdimm, NVDIMM_USER);
22
23	if (test_bit(NVDIMM_SECURITY_DISABLED, &nvdimm->sec.flags))
24		return sprintf(buf, "disabled\n");
25	if (test_bit(NVDIMM_SECURITY_UNLOCKED, &nvdimm->sec.flags))
26		return sprintf(buf, "unlocked\n");
27	if (test_bit(NVDIMM_SECURITY_LOCKED, &nvdimm->sec.flags))
28		return sprintf(buf, "locked\n");
29	return -ENOTTY;
30}