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Date: Wed, 14 Aug 2019 18:20:29 -0700
From: Dan Williams <dan.j.williams@...el.com>
To: linux-nvdimm@...ts.01.org
Cc: Dave Jiang <dave.jiang@...el.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] libnvdimm/security: Consolidate 'security' operations
The security operations are exported from libnvdimm/security.c to
libnvdimm/dimm_devs.c, and libnvdimm/security.c is optionally compiled
based on the CONFIG_NVDIMM_KEYS config symbol.
Rather than export the operations across compile objects, just move the
__security_store() entry point to live with the helpers.
Cc: Dave Jiang <dave.jiang@...el.com>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
---
drivers/nvdimm/dimm_devs.c | 84 -----------------------------------------
drivers/nvdimm/nd-core.h | 30 +--------------
drivers/nvdimm/security.c | 90 ++++++++++++++++++++++++++++++++++++++++++--
3 files changed, 90 insertions(+), 114 deletions(-)
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c
index d837cb9be83d..196aa44c4936 100644
--- a/drivers/nvdimm/dimm_devs.c
+++ b/drivers/nvdimm/dimm_devs.c
@@ -393,88 +393,6 @@ static ssize_t frozen_show(struct device *dev,
}
static DEVICE_ATTR_RO(frozen);
-#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 };
-#undef C
-#define C(a, b, c) { b, c }
-static struct {
- const char *name;
- int args;
-} ops[] = { OPS };
-#undef C
-
-#define SEC_CMD_SIZE 32
-#define KEY_ID_SIZE 10
-
-static ssize_t __security_store(struct device *dev, const char *buf, size_t len)
-{
- struct nvdimm *nvdimm = to_nvdimm(dev);
- ssize_t rc;
- char cmd[SEC_CMD_SIZE+1], keystr[KEY_ID_SIZE+1],
- nkeystr[KEY_ID_SIZE+1];
- unsigned int key, newkey;
- int i;
-
- rc = sscanf(buf, "%"__stringify(SEC_CMD_SIZE)"s"
- " %"__stringify(KEY_ID_SIZE)"s"
- " %"__stringify(KEY_ID_SIZE)"s",
- cmd, keystr, nkeystr);
- if (rc < 1)
- return -EINVAL;
- for (i = 0; i < ARRAY_SIZE(ops); i++)
- if (sysfs_streq(cmd, ops[i].name))
- break;
- if (i >= ARRAY_SIZE(ops))
- return -EINVAL;
- if (ops[i].args > 1)
- rc = kstrtouint(keystr, 0, &key);
- if (rc >= 0 && ops[i].args > 2)
- rc = kstrtouint(nkeystr, 0, &newkey);
- if (rc < 0)
- return rc;
-
- if (i == OP_FREEZE) {
- dev_dbg(dev, "freeze\n");
- rc = nvdimm_security_freeze(nvdimm);
- } else if (i == OP_DISABLE) {
- dev_dbg(dev, "disable %u\n", key);
- rc = nvdimm_security_disable(nvdimm, key);
- } else if (i == OP_UPDATE || i == OP_MASTER_UPDATE) {
- dev_dbg(dev, "%s %u %u\n", ops[i].name, key, newkey);
- rc = nvdimm_security_update(nvdimm, key, newkey, i == OP_UPDATE
- ? NVDIMM_USER : NVDIMM_MASTER);
- } else if (i == OP_ERASE || i == OP_MASTER_ERASE) {
- dev_dbg(dev, "%s %u\n", ops[i].name, key);
- if (atomic_read(&nvdimm->busy)) {
- dev_dbg(dev, "Unable to secure erase while DIMM active.\n");
- return -EBUSY;
- }
- rc = nvdimm_security_erase(nvdimm, key, i == OP_ERASE
- ? NVDIMM_USER : NVDIMM_MASTER);
- } else if (i == OP_OVERWRITE) {
- dev_dbg(dev, "overwrite %u\n", key);
- if (atomic_read(&nvdimm->busy)) {
- dev_dbg(dev, "Unable to overwrite while DIMM active.\n");
- return -EBUSY;
- }
- rc = nvdimm_security_overwrite(nvdimm, key);
- } else
- return -EINVAL;
-
- if (rc == 0)
- rc = len;
- return rc;
-}
-
static ssize_t security_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
@@ -489,7 +407,7 @@ static ssize_t security_store(struct device *dev,
nd_device_lock(dev);
nvdimm_bus_lock(dev);
wait_nvdimm_bus_probe_idle(dev);
- rc = __security_store(dev, buf, len);
+ rc = nvdimm_security_store(dev, buf, len);
nvdimm_bus_unlock(dev);
nd_device_unlock(dev);
diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h
index da2bbfd56d9f..454454ba1738 100644
--- a/drivers/nvdimm/nd-core.h
+++ b/drivers/nvdimm/nd-core.h
@@ -68,35 +68,11 @@ static inline unsigned long nvdimm_security_flags(
}
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,
- 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);
+ssize_t nvdimm_security_store(struct device *dev, const char *buf, size_t len);
void nvdimm_security_overwrite_query(struct work_struct *work);
#else
-static inline int nvdimm_security_disable(struct nvdimm *nvdimm,
- unsigned int keyid)
-{
- return -EOPNOTSUPP;
-}
-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,
- enum nvdimm_passphrase_type pass_type)
-{
- return -EOPNOTSUPP;
-}
-static inline int nvdimm_security_overwrite(struct nvdimm *nvdimm,
- unsigned int keyid)
+static inline ssize_t nvdimm_security_store(struct device *dev,
+ const char *buf, size_t len)
{
return -EOPNOTSUPP;
}
diff --git a/drivers/nvdimm/security.c b/drivers/nvdimm/security.c
index 2166e627383a..9e45b207ff01 100644
--- a/drivers/nvdimm/security.c
+++ b/drivers/nvdimm/security.c
@@ -235,7 +235,7 @@ static int check_security_state(struct nvdimm *nvdimm)
return 0;
}
-int nvdimm_security_disable(struct nvdimm *nvdimm, unsigned int keyid)
+static int security_disable(struct nvdimm *nvdimm, unsigned int keyid)
{
struct device *dev = &nvdimm->dev;
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
@@ -268,7 +268,7 @@ int nvdimm_security_disable(struct nvdimm *nvdimm, unsigned int keyid)
return rc;
}
-int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
+static int security_update(struct nvdimm *nvdimm, unsigned int keyid,
unsigned int new_keyid,
enum nvdimm_passphrase_type pass_type)
{
@@ -318,7 +318,7 @@ int nvdimm_security_update(struct nvdimm *nvdimm, unsigned int keyid,
return rc;
}
-int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid,
+static int security_erase(struct nvdimm *nvdimm, unsigned int keyid,
enum nvdimm_passphrase_type pass_type)
{
struct device *dev = &nvdimm->dev;
@@ -360,7 +360,7 @@ int nvdimm_security_erase(struct nvdimm *nvdimm, unsigned int keyid,
return rc;
}
-int nvdimm_security_overwrite(struct nvdimm *nvdimm, unsigned int keyid)
+static int security_overwrite(struct nvdimm *nvdimm, unsigned int keyid)
{
struct device *dev = &nvdimm->dev;
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
@@ -465,3 +465,85 @@ void nvdimm_security_overwrite_query(struct work_struct *work)
__nvdimm_security_overwrite_query(nvdimm);
nvdimm_bus_unlock(&nvdimm->dev);
}
+
+#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 };
+#undef C
+#define C(a, b, c) { b, c }
+static struct {
+ const char *name;
+ int args;
+} ops[] = { OPS };
+#undef C
+
+#define SEC_CMD_SIZE 32
+#define KEY_ID_SIZE 10
+
+ssize_t nvdimm_security_store(struct device *dev, const char *buf, size_t len)
+{
+ struct nvdimm *nvdimm = to_nvdimm(dev);
+ ssize_t rc;
+ char cmd[SEC_CMD_SIZE+1], keystr[KEY_ID_SIZE+1],
+ nkeystr[KEY_ID_SIZE+1];
+ unsigned int key, newkey;
+ int i;
+
+ rc = sscanf(buf, "%"__stringify(SEC_CMD_SIZE)"s"
+ " %"__stringify(KEY_ID_SIZE)"s"
+ " %"__stringify(KEY_ID_SIZE)"s",
+ cmd, keystr, nkeystr);
+ if (rc < 1)
+ return -EINVAL;
+ for (i = 0; i < ARRAY_SIZE(ops); i++)
+ if (sysfs_streq(cmd, ops[i].name))
+ break;
+ if (i >= ARRAY_SIZE(ops))
+ return -EINVAL;
+ if (ops[i].args > 1)
+ rc = kstrtouint(keystr, 0, &key);
+ if (rc >= 0 && ops[i].args > 2)
+ rc = kstrtouint(nkeystr, 0, &newkey);
+ if (rc < 0)
+ return rc;
+
+ if (i == OP_FREEZE) {
+ dev_dbg(dev, "freeze\n");
+ rc = nvdimm_security_freeze(nvdimm);
+ } else if (i == OP_DISABLE) {
+ dev_dbg(dev, "disable %u\n", key);
+ rc = security_disable(nvdimm, key);
+ } else if (i == OP_UPDATE || i == OP_MASTER_UPDATE) {
+ dev_dbg(dev, "%s %u %u\n", ops[i].name, key, newkey);
+ rc = security_update(nvdimm, key, newkey, i == OP_UPDATE
+ ? NVDIMM_USER : NVDIMM_MASTER);
+ } else if (i == OP_ERASE || i == OP_MASTER_ERASE) {
+ dev_dbg(dev, "%s %u\n", ops[i].name, key);
+ if (atomic_read(&nvdimm->busy)) {
+ dev_dbg(dev, "Unable to secure erase while DIMM active.\n");
+ return -EBUSY;
+ }
+ rc = security_erase(nvdimm, key, i == OP_ERASE
+ ? NVDIMM_USER : NVDIMM_MASTER);
+ } else if (i == OP_OVERWRITE) {
+ dev_dbg(dev, "overwrite %u\n", key);
+ if (atomic_read(&nvdimm->busy)) {
+ dev_dbg(dev, "Unable to overwrite while DIMM active.\n");
+ return -EBUSY;
+ }
+ rc = security_overwrite(nvdimm, key);
+ } else
+ return -EINVAL;
+
+ if (rc == 0)
+ rc = len;
+ return rc;
+}
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