LXR linux/tools/testing/nvdimm/dimm

   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}
  31