summaryrefslogtreecommitdiffstats
path: root/drivers/nvdimm/security.c
diff options
context:
space:
mode:
authorDave Jiang <dave.jiang@intel.com>2018-12-10 18:53:22 +0100
committerDan Williams <dan.j.williams@intel.com>2018-12-21 21:44:41 +0100
commit89fa9d8ea7bdfa841d19044485cec5f4171069e5 (patch)
tree2be60d02c3f6baac9186566e9077a7879a523fac /drivers/nvdimm/security.c
parentacpi/nfit, libnvdimm/security: Add security DSM overwrite support (diff)
downloadlinux-89fa9d8ea7bdfa841d19044485cec5f4171069e5.tar.xz
linux-89fa9d8ea7bdfa841d19044485cec5f4171069e5.zip
acpi/nfit, libnvdimm/security: add Intel DSM 1.8 master passphrase support
With Intel DSM 1.8 [1] two new security DSMs are introduced. Enable/update master passphrase and master secure erase. The master passphrase allows a secure erase to be performed without the user passphrase that is set on the NVDIMM. The commands of master_update and master_erase are added to the sysfs knob in order to initiate the DSMs. They are similar in opeartion mechanism compare to update and erase. [1]: http://pmem.io/documents/NVDIMM_DSM_Interface-V1.8.pdf Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/security.c')
-rw-r--r--drivers/nvdimm/security.c43
1 files changed, 31 insertions, 12 deletions
diff --git a/drivers/nvdimm/security.c b/drivers/nvdimm/security.c
index 5055979f89c4..d9a39dc251e9 100644
--- a/drivers/nvdimm/security.c
+++ b/drivers/nvdimm/security.c
@@ -121,7 +121,8 @@ static struct key *nvdimm_key_revalidate(struct nvdimm *nvdimm)
* Send the same key to the hardware as new and old key to
* verify that the key is good.
*/
- rc = nvdimm->sec.ops->change_key(nvdimm, key_data(key), key_data(key));
+ rc = nvdimm->sec.ops->change_key(nvdimm, key_data(key),
+ key_data(key), NVDIMM_USER);
if (rc < 0) {
nvdimm_put_key(key);
key = NULL;
@@ -173,7 +174,7 @@ static int __nvdimm_security_unlock(struct nvdimm *nvdimm)
rc == 0 ? "success" : "fail");
nvdimm_put_key(key);
- nvdimm->sec.state = nvdimm_security_state(nvdimm);
+ nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
return rc;
}
@@ -222,12 +223,13 @@ int nvdimm_security_disable(struct nvdimm *nvdimm, unsigned int keyid)
rc == 0 ? "success" : "fail");
nvdimm_put_key(key);
- nvdimm->sec.state = nvdimm_security_state(nvdimm);
+ nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
return rc;
}
int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
- unsigned int new_keyid)
+ unsigned int new_keyid,
+ enum nvdimm_passphrase_type pass_type)
{
struct device *dev = &nvdimm->dev;
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
@@ -262,18 +264,25 @@ int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
}
rc = nvdimm->sec.ops->change_key(nvdimm, key ? key_data(key) : NULL,
- key_data(newkey));
- dev_dbg(dev, "key: %d %d update: %s\n",
+ key_data(newkey), pass_type);
+ dev_dbg(dev, "key: %d %d update%s: %s\n",
key_serial(key), key_serial(newkey),
+ pass_type == NVDIMM_MASTER ? "(master)" : "(user)",
rc == 0 ? "success" : "fail");
nvdimm_put_key(newkey);
nvdimm_put_key(key);
- nvdimm->sec.state = nvdimm_security_state(nvdimm);
+ if (pass_type == NVDIMM_MASTER)
+ nvdimm->sec.ext_state = nvdimm_security_state(nvdimm,
+ NVDIMM_MASTER);
+ else
+ nvdimm->sec.state = nvdimm_security_state(nvdimm,
+ NVDIMM_USER);
return rc;
}
-int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid)
+int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid,
+ enum nvdimm_passphrase_type pass_type)
{
struct device *dev = &nvdimm->dev;
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
@@ -303,16 +312,24 @@ int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid)
return -EBUSY;
}
+ if (nvdimm->sec.ext_state != NVDIMM_SECURITY_UNLOCKED
+ && pass_type == NVDIMM_MASTER) {
+ dev_warn(dev,
+ "Attempt to secure erase in wrong master state.\n");
+ return -EOPNOTSUPP;
+ }
+
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 = nvdimm->sec.ops->erase(nvdimm, key_data(key), pass_type);
+ dev_dbg(dev, "key: %d erase%s: %s\n", key_serial(key),
+ pass_type == NVDIMM_MASTER ? "(master)" : "(user)",
rc == 0 ? "success" : "fail");
nvdimm_put_key(key);
- nvdimm->sec.state = nvdimm_security_state(nvdimm);
+ nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
return rc;
}
@@ -375,6 +392,7 @@ int nvdimm_security_overwrite(struct nvdimm *nvdimm, unsigned int keyid)
get_device(dev);
queue_delayed_work(system_wq, &nvdimm->dwork, 0);
}
+
return rc;
}
@@ -421,7 +439,8 @@ void __nvdimm_security_overwrite_query(struct nvdimm *nvdimm)
clear_bit(NDD_SECURITY_OVERWRITE, &nvdimm->flags);
clear_bit(NDD_WORK_PENDING, &nvdimm->flags);
put_device(&nvdimm->dev);
- nvdimm->sec.state = nvdimm_security_state(nvdimm);
+ nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
+ nvdimm->sec.ext_state = nvdimm_security_state(nvdimm, NVDIMM_MASTER);
}
void nvdimm_security_overwrite_query(struct work_struct *work)