diff options
Diffstat (limited to 'drivers/nvdimm/security.c')
| -rw-r--r-- | drivers/nvdimm/security.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/nvdimm/security.c b/drivers/nvdimm/security.c index df7f070e96fb..05677be3c0dd 100644 --- a/drivers/nvdimm/security.c +++ b/drivers/nvdimm/security.c @@ -33,6 +33,9 @@ static void *key_data(struct key *key) static void nvdimm_put_key(struct key *key) { + if (!key) + return; + up_read(&key->sem); key_put(key); } @@ -259,3 +262,41 @@ int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid, nvdimm->sec.state = nvdimm_security_state(nvdimm); return rc; } + +int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid) +{ + struct device *dev = &nvdimm->dev; + struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); + struct key *key; + int rc; + + /* The bus lock should be held at the top level of the call stack */ + lockdep_assert_held(&nvdimm_bus->reconfig_mutex); + + if (!nvdimm->sec.ops || !nvdimm->sec.ops->erase + || nvdimm->sec.state < 0) + return -EOPNOTSUPP; + + if (atomic_read(&nvdimm->busy)) { + dev_warn(dev, "Unable to secure erase while DIMM active.\n"); + return -EBUSY; + } + + if (nvdimm->sec.state >= NVDIMM_SECURITY_FROZEN) { + dev_warn(dev, "Incorrect security state: %d\n", + nvdimm->sec.state); + return -EIO; + } + + key = nvdimm_lookup_user_key(nvdimm, keyid, NVDIMM_BASE_KEY); + if (!key) + return -ENOKEY; + + rc = nvdimm->sec.ops->erase(nvdimm, key_data(key)); + dev_dbg(dev, "key: %d erase: %s\n", key_serial(key), + rc == 0 ? "success" : "fail"); + + nvdimm_put_key(key); + nvdimm->sec.state = nvdimm_security_state(nvdimm); + return rc; +} |