tools/testing/nvdimm/dimm_devs.c

   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
  12 ssize_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.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
  22         nvdimm->sec.ext_state = nvdimm_security_state(nvdimm, NVDIMM_MASTER);
  23
  24         switch (nvdimm->sec.state) {
  25         case NVDIMM_SECURITY_DISABLED:
  26                 return sprintf(buf, "disabled\n");
  27         case NVDIMM_SECURITY_UNLOCKED:
  28                 return sprintf(buf, "unlocked\n");
  29         case NVDIMM_SECURITY_LOCKED:
  30                 return sprintf(buf, "locked\n");
  31         case NVDIMM_SECURITY_FROZEN:
  32                 return sprintf(buf, "frozen\n");
  33         case NVDIMM_SECURITY_OVERWRITE:
  34                 return sprintf(buf, "overwrite\n");
  35         default:
  36                 return -ENOTTY;
  37         }
  38
  39         return -ENOTTY;
  40 }
  41