Add support to secure erase to libndctl and also command line option
of "sanitize-dimm" for ndctl. This will initiate the request to crypto
erase a DIMM.
Signed-off-by: Dave Jiang <dave.ji...@intel.com>
---
Documentation/ndctl/Makefile.am | 3 +-
Documentation/ndctl/ndctl-sanitize-dimm.txt | 32 +++++++++++++++++
builtin.h | 1 +
ndctl/dimm.c | 51 +++++++++++++++++++++++++++
ndctl/lib/dimm.c | 8 ++++
ndctl/lib/keys.c | 19 ++++++++--
ndctl/lib/libndctl.sym | 2 +
ndctl/libndctl.h | 7 ++++
ndctl/ndctl.c | 1 +
9 files changed, 120 insertions(+), 4 deletions(-)
create mode 100644 Documentation/ndctl/ndctl-sanitize-dimm.txt
diff --git a/Documentation/ndctl/Makefile.am b/Documentation/ndctl/Makefile.am
index a97f193d..bbea9674 100644
--- a/Documentation/ndctl/Makefile.am
+++ b/Documentation/ndctl/Makefile.am
@@ -51,7 +51,8 @@ man1_MANS = \
ndctl-enable-passphrase.1 \
ndctl-update-passphrase.1 \
ndctl-disable-passphrase.1 \
- ndctl-freeze-security.1
+ ndctl-freeze-security.1 \
+ ndctl-sanitize-dimm.1
CLEANFILES = $(man1_MANS)
diff --git a/Documentation/ndctl/ndctl-sanitize-dimm.txt
b/Documentation/ndctl/ndctl-sanitize-dimm.txt
new file mode 100644
index 00000000..a6802d30
--- /dev/null
+++ b/Documentation/ndctl/ndctl-sanitize-dimm.txt
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0
+
+ndctl-sanitize-dimm(1)
+======================
+
+NAME
+----
+ndctl-sanitize-dimm - sanitize the data on the NVDIMM
+
+SYNOPSIS
+--------
+[verse]
+'ndctl sanitize' <dimm> [<options>]
+
+DESCRIPTION
+-----------
+Provide a generic interface to crypto erase a NVDIMM.
+Ndctl will search the user key ring for the associated DIMM. If no key is
+found, it will attempt to load the key blob from the expected location. Ndctl
+will remove the key and the key blob once security is disabled.
+
+OPTIONS
+-------
+<dimm>::
+include::xable-dimm-options.txt[]
+
+-c::
+--crypto-erase::
+ Replaces encryption keys and securely erases the data. This does not
+ change label data. This is the default sanitize method.
+
+include::../copyright.txt[]
diff --git a/builtin.h b/builtin.h
index 827295da..db0f2858 100644
--- a/builtin.h
+++ b/builtin.h
@@ -52,4 +52,5 @@ int cmd_passphrase_setup(int argc, const char **argv, void
*ctx);
int cmd_passphrase_update(int argc, const char **argv, void *ctx);
int cmd_disable_passphrase(int argc, const char **argv, void *ctx);
int cmd_freeze_security(int argc, const char **argv, void *ctx);
+int cmd_sanitize_dimm(int argc, const char **argv, void *ctx);
#endif /* _NDCTL_BUILTIN_H_ */
diff --git a/ndctl/dimm.c b/ndctl/dimm.c
index 6476b6e5..ae674f78 100644
--- a/ndctl/dimm.c
+++ b/ndctl/dimm.c
@@ -46,6 +46,7 @@ static struct parameters {
const char *infile;
const char *labelversion;
const char *master_key;
+ bool crypto_erase;
bool force;
bool json;
bool verbose;
@@ -891,6 +892,35 @@ static int action_security_freeze(struct ndctl_dimm *dimm,
return rc;
}
+static int action_sanitize_dimm(struct ndctl_dimm *dimm,
+ struct action_context *actx)
+{
+ int rc;
+
+ if (!ndctl_dimm_security_supported(dimm)) {
+ error("%s: security operation not supported\n",
+ ndctl_dimm_get_devname(dimm));
+ return -EOPNOTSUPP;
+ }
+
+ /*
+ * Setting crypto erase to be default. The other method will be
+ * overwrite.
+ */
+ if (!param.crypto_erase) {
+ param.crypto_erase = true;
+ printf("No santize method passed in, default to
crypto-erase\n");
+ }
+
+ if (param.crypto_erase) {
+ rc = ndctl_dimm_secure_erase_key(dimm);
+ if (rc < 0)
+ return rc;
+ }
+
+ return 0;
+}
+
static int __action_init(struct ndctl_dimm *dimm,
enum ndctl_namespace_version version, int chk_only)
{
@@ -984,6 +1014,10 @@ OPT_STRING('V', "label-version", ¶m.labelversion,
"version-number", \
OPT_STRING('m', "master-key", ¶m.master_key, "<key_type>:<key_name>", \
"master key for security")
+#define SANITIZE_OPTIONS() \
+OPT_BOOLEAN('c', "crypto-erase", ¶m.crypto_erase, \
+ "crypto erase a dimm")
+
static const struct option read_options[] = {
BASE_OPTIONS(),
READ_OPTIONS(),
@@ -1019,6 +1053,12 @@ static const struct option key_options[] = {
OPT_END(),
};
+static const struct option sanitize_options[] = {
+ BASE_OPTIONS(),
+ SANITIZE_OPTIONS(),
+ OPT_END(),
+};
+
static int dimm_action(int argc, const char **argv, void *ctx,
int (*action)(struct ndctl_dimm *dimm, struct action_context
*actx),
const struct option *options, const char *usage)
@@ -1295,3 +1335,14 @@ int cmd_freeze_security(int argc, const char **argv,
void *ctx)
count > 1 ? "s" : "");
return count >= 0 ? 0 : EXIT_FAILURE;
}
+
+int cmd_sanitize_dimm(int argc, const char **argv, void *ctx)
+{
+ int count = dimm_action(argc, argv, ctx, action_sanitize_dimm,
+ sanitize_options,
+ "ndctl sanitize-dimm <nmem0> [<nmem1>..<nmemN>]
[<options>]");
+
+ fprintf(stderr, "sanitized %d nmem%s.\n", count >= 0 ? count : 0,
+ count > 1 ? "s" : "");
+ return count >= 0 ? 0 : EXIT_FAILURE;
+}
diff --git a/ndctl/lib/dimm.c b/ndctl/lib/dimm.c
index 227c7124..6da29c1e 100644
--- a/ndctl/lib/dimm.c
+++ b/ndctl/lib/dimm.c
@@ -673,3 +673,11 @@ NDCTL_EXPORT int ndctl_dimm_freeze_security(struct
ndctl_dimm *dimm)
{
return write_security(dimm, "freeze");
}
+
+NDCTL_EXPORT int ndctl_dimm_secure_erase(struct ndctl_dimm *dimm, long key)
+{
+ char buf[SYSFS_ATTR_SIZE];
+
+ sprintf(buf, "erase %ld\n", key);
+ return write_security(dimm, buf);
+}
diff --git a/ndctl/lib/keys.c b/ndctl/lib/keys.c
index 779e82af..130c29ed 100644
--- a/ndctl/lib/keys.c
+++ b/ndctl/lib/keys.c
@@ -388,7 +388,8 @@ NDCTL_EXPORT int ndctl_dimm_update_key(struct ndctl_dimm
*dimm,
return 0;
}
-NDCTL_EXPORT int ndctl_dimm_disable_key(struct ndctl_dimm *dimm)
+static int check_key_run_and_discard(struct ndctl_dimm *dimm,
+ int (*run_op)(struct ndctl_dimm *, long), const char *name)
{
struct ndctl_ctx *ctx = ndctl_dimm_get_ctx(dimm);
key_serial_t key;
@@ -403,9 +404,9 @@ NDCTL_EXPORT int ndctl_dimm_disable_key(struct ndctl_dimm
*dimm)
}
}
- rc = ndctl_dimm_disable_passphrase(dimm, key);
+ rc = run_op(dimm, key);
if (rc < 0) {
- err(ctx, "Failed to disable security for %s\n",
+ err(ctx, "Failed %s for %s\n", name,
ndctl_dimm_get_devname(dimm));
return rc;
}
@@ -415,3 +416,15 @@ NDCTL_EXPORT int ndctl_dimm_disable_key(struct ndctl_dimm
*dimm)
err(ctx, "Unable to cleanup key.\n");
return 0;
}
+
+NDCTL_EXPORT int ndctl_dimm_disable_key(struct ndctl_dimm *dimm)
+{
+ return check_key_run_and_discard(dimm, ndctl_dimm_disable_passphrase,
+ "disable passphrase");
+}
+
+NDCTL_EXPORT int ndctl_dimm_secure_erase_key(struct ndctl_dimm *dimm)
+{
+ return check_key_run_and_discard(dimm, ndctl_dimm_secure_erase,
+ "crypto erase");
+}
diff --git a/ndctl/lib/libndctl.sym b/ndctl/lib/libndctl.sym
index a1c56060..0e3aa5d9 100644
--- a/ndctl/lib/libndctl.sym
+++ b/ndctl/lib/libndctl.sym
@@ -396,4 +396,6 @@ global:
ndctl_dimm_disable_passphrase;
ndctl_dimm_disable_key;
ndctl_dimm_freeze_security;
+ ndctl_dimm_secure_erase;
+ ndctl_dimm_secure_erase_key;
} LIBNDCTL_18;
diff --git a/ndctl/libndctl.h b/ndctl/libndctl.h
index 7bb7132c..19053a20 100644
--- a/ndctl/libndctl.h
+++ b/ndctl/libndctl.h
@@ -704,6 +704,7 @@ int ndctl_dimm_update_passphrase(struct ndctl_dimm *dimm,
long ckey, long nkey);
int ndctl_dimm_disable_passphrase(struct ndctl_dimm *dimm, long key);
int ndctl_dimm_freeze_security(struct ndctl_dimm *dimm);
+int ndctl_dimm_secure_erase(struct ndctl_dimm *dimm, long key);
enum ndctl_key_type {
ND_USER_KEY,
@@ -714,6 +715,7 @@ enum ndctl_key_type {
int ndctl_dimm_enable_key(struct ndctl_dimm *dimm, const char *master);
int ndctl_dimm_update_key(struct ndctl_dimm *dimm, const char *master);
int ndctl_dimm_disable_key(struct ndctl_dimm *dimm);
+int ndctl_dimm_secure_erase_key(struct ndctl_dimm *dimm);
#else
static inline int ndctl_dimm_enable_key(struct ndctl_dimm *dimm,
const char *master)
@@ -731,6 +733,11 @@ static inline int ndctl_dimm_disable_key(struct ndctl_dimm
*dimm)
{
return -EOPNOTSUPP;
}
+
+static inline int ndctl_dimm_secure_erase_key(struct ndctl_dimm *dimm)
+{
+ return -EOPNOTSUPP;
+}
#endif
#ifdef __cplusplus
diff --git a/ndctl/ndctl.c b/ndctl/ndctl.c
index d08fee4d..40982f43 100644
--- a/ndctl/ndctl.c
+++ b/ndctl/ndctl.c
@@ -92,6 +92,7 @@ static struct cmd_struct commands[] = {
{ "update-passphrase", cmd_passphrase_update },
{ "disable-passphrase", cmd_disable_passphrase },
{ "freeze-security", cmd_freeze_security },
+ { "sanitize-dimm", cmd_sanitize_dimm },
{ "list", cmd_list },
{ "monitor", cmd_monitor},
{ "help", cmd_help },
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