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authorDave Jiang <dave.jiang@intel.com>2018-12-10 17:53:22 (GMT)
committerDan Williams <dan.j.williams@intel.com>2018-12-21 20:44:41 (GMT)
commit89fa9d8ea7bdfa841d19044485cec5f4171069e5 (patch)
tree2be60d02c3f6baac9186566e9077a7879a523fac /drivers/nvdimm
parent7d988097c546187ada602cc9bccd0f03d473eb8f (diff)
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')
-rw-r--r--drivers/nvdimm/dimm_devs.c34
-rw-r--r--drivers/nvdimm/nd-core.h21
-rw-r--r--drivers/nvdimm/security.c43
3 files changed, 69 insertions, 29 deletions
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c
index 6affa27..bd3f156 100644
--- a/drivers/nvdimm/dimm_devs.c
+++ b/drivers/nvdimm/dimm_devs.c
@@ -386,17 +386,21 @@ static ssize_t security_show(struct device *dev,
return sprintf(buf, "frozen\n");
case NVDIMM_SECURITY_OVERWRITE:
return sprintf(buf, "overwrite\n");
+ default:
+ return -ENOTTY;
}
return -ENOTTY;
}
-#define OPS \
- C( OP_FREEZE, "freeze", 1), \
- C( OP_DISABLE, "disable", 2), \
- C( OP_UPDATE, "update", 3), \
- C( OP_ERASE, "erase", 2), \
- C( OP_OVERWRITE, "overwrite", 2)
+#define OPS \
+ C( OP_FREEZE, "freeze", 1), \
+ C( OP_DISABLE, "disable", 2), \
+ C( OP_UPDATE, "update", 3), \
+ C( OP_ERASE, "erase", 2), \
+ C( OP_OVERWRITE, "overwrite", 2), \
+ C( OP_MASTER_UPDATE, "master_update", 3), \
+ C( OP_MASTER_ERASE, "master_erase", 2)
#undef C
#define C(a, b, c) a
enum nvdimmsec_op_ids { OPS };
@@ -449,13 +453,21 @@ static ssize_t __security_store(struct device *dev, const char *buf, size_t len)
rc = nvdimm_security_disable(nvdimm, key);
} else if (i == OP_UPDATE) {
dev_dbg(dev, "update %u %u\n", key, newkey);
- rc = nvdimm_security_update(nvdimm, key, newkey);
+ rc = nvdimm_security_update(nvdimm, key, newkey, NVDIMM_USER);
} else if (i == OP_ERASE) {
dev_dbg(dev, "erase %u\n", key);
- rc = nvdimm_security_erase(nvdimm, key);
+ rc = nvdimm_security_erase(nvdimm, key, NVDIMM_USER);
} else if (i == OP_OVERWRITE) {
dev_dbg(dev, "overwrite %u\n", key);
rc = nvdimm_security_overwrite(nvdimm, key);
+ } else if (i == OP_MASTER_UPDATE) {
+ dev_dbg(dev, "master_update %u %u\n", key, newkey);
+ rc = nvdimm_security_update(nvdimm, key, newkey,
+ NVDIMM_MASTER);
+ } else if (i == OP_MASTER_ERASE) {
+ dev_dbg(dev, "master_erase %u\n", key);
+ rc = nvdimm_security_erase(nvdimm, key,
+ NVDIMM_MASTER);
} else
return -EINVAL;
@@ -557,7 +569,9 @@ struct nvdimm *__nvdimm_create(struct nvdimm_bus *nvdimm_bus,
* Security state must be initialized before device_add() for
* attribute visibility.
*/
- nvdimm->sec.state = nvdimm_security_state(nvdimm);
+ /* get security state and extended (master) state */
+ nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
+ nvdimm->sec.ext_state = nvdimm_security_state(nvdimm, NVDIMM_MASTER);
nd_device_register(dev);
return nvdimm;
@@ -598,7 +612,7 @@ int nvdimm_security_freeze(struct nvdimm *nvdimm)
}
rc = nvdimm->sec.ops->freeze(nvdimm);
- nvdimm->sec.state = nvdimm_security_state(nvdimm);
+ nvdimm->sec.state = nvdimm_security_state(nvdimm, NVDIMM_USER);
return rc;
}
diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h
index 952d688..52d20d9 100644
--- a/drivers/nvdimm/nd-core.h
+++ b/drivers/nvdimm/nd-core.h
@@ -46,6 +46,7 @@ struct nvdimm {
struct {
const struct nvdimm_security_ops *ops;
enum nvdimm_security_state state;
+ enum nvdimm_security_state ext_state;
unsigned int overwrite_tmo;
struct kernfs_node *overwrite_state;
} sec;
@@ -53,19 +54,21 @@ struct nvdimm {
};
static inline enum nvdimm_security_state nvdimm_security_state(
- struct nvdimm *nvdimm)
+ struct nvdimm *nvdimm, bool master)
{
if (!nvdimm->sec.ops)
return -ENXIO;
- return nvdimm->sec.ops->state(nvdimm);
+ return nvdimm->sec.ops->state(nvdimm, master);
}
int nvdimm_security_freeze(struct nvdimm *nvdimm);
#if IS_ENABLED(CONFIG_NVDIMM_KEYS)
int nvdimm_security_disable(struct nvdimm *nvdimm, unsigned int keyid);
int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
- unsigned int new_keyid);
-int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid);
+ unsigned int new_keyid,
+ enum nvdimm_passphrase_type pass_type);
+int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid,
+ enum nvdimm_passphrase_type pass_type);
int nvdimm_security_overwrite(struct nvdimm *nvdimm, unsigned int keyid);
void nvdimm_security_overwrite_query(struct work_struct *work);
#else
@@ -74,12 +77,16 @@ static inline int nvdimm_security_disable(struct nvdimm *nvdimm,
{
return -EOPNOTSUPP;
}
-static inline int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
- unsigned int new_keyid)
+static inline int nvdimm_security_update(struct nvdimm *nvdimm,
+ unsigned int keyid,
+ unsigned int new_keyid,
+ enum nvdimm_passphrase_type pass_type)
{
return -EOPNOTSUPP;
}
-static inline int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid)
+static inline int nvdimm_security_erase(struct nvdimm *nvdimm,
+ unsigned int keyid,
+ enum nvdimm_passphrase_type pass_type)
{
return -EOPNOTSUPP;
}
diff --git a/drivers/nvdimm/security.c b/drivers/nvdimm/security.c
index 5055979..d9a39dc 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)

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