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authorLinus Torvalds <torvalds@linux-foundation.org>2018-12-28 15:05:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-12-28 15:05:13 -0800
commit75f95da078b2891cd186f074ffc15a8e7c3f082d (patch)
tree2ba8da10d0d1e20565e893a777d4349fe9d483dd /include
parent4ed7bdc1eb4c82cf4bfdf6a94dd36fd695f6f387 (diff)
parent4b5f747e82b12b6d8ab815fc259827a615c7f2c3 (diff)
downloadlinux-stericsson-75f95da078b2891cd186f074ffc15a8e7c3f082d.tar.gz
Merge tag 'libnvdimm-for-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm updates from Dan Williams: "The vast bulk of this update is the new support for the security capabilities of some nvdimms. The userspace tooling for this capability is still a work in progress, but the changes survive the existing libnvdimm unit tests. The changes also pass manual checkout on hardware and the new nfit_test emulation of the security capability. The touches of the security/keys/ files have received the necessary acks from Mimi and David. Those changes were necessary to allow for a new generic encrypted-key type, and allow the nvdimm sub-system to lookup key material referenced by the libnvdimm-sysfs interface. Summary: - Add support for the security features of nvdimm devices that implement a security model similar to ATA hard drive security. The security model supports locking access to the media at device-power-loss, to be unlocked with a passphrase, and secure-erase (crypto-scramble). Unlike the ATA security case where the kernel expects device security to be managed in a pre-OS environment, the libnvdimm security implementation allows key provisioning and key-operations at OS runtime. Keys are managed with the kernel's encrypted-keys facility to provide data-at-rest security for the libnvdimm key material. The usage model mirrors fscrypt key management, but is driven via libnvdimm sysfs. - Miscellaneous updates for api usage and comment fixes" * tag 'libnvdimm-for-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (21 commits) libnvdimm/security: Quiet security operations libnvdimm/security: Add documentation for nvdimm security support tools/testing/nvdimm: add Intel DSM 1.8 support for nfit_test tools/testing/nvdimm: Add overwrite support for nfit_test tools/testing/nvdimm: Add test support for Intel nvdimm security DSMs acpi/nfit, libnvdimm/security: add Intel DSM 1.8 master passphrase support acpi/nfit, libnvdimm/security: Add security DSM overwrite support acpi/nfit, libnvdimm: Add support for issue secure erase DSM to Intel nvdimm acpi/nfit, libnvdimm: Add enable/update passphrase support for Intel nvdimms acpi/nfit, libnvdimm: Add disable passphrase support to Intel nvdimm. acpi/nfit, libnvdimm: Add unlock of nvdimm support for Intel DIMMs acpi/nfit, libnvdimm: Add freeze security support to Intel nvdimm acpi/nfit, libnvdimm: Introduce nvdimm_security_ops keys-encrypted: add nvdimm key format type to encrypted keys keys: Export lookup_user_key to external users acpi/nfit, libnvdimm: Store dimm id as a member to struct nvdimm libnvdimm, namespace: Replace kmemdup() with kstrndup() libnvdimm, label: Switch to bitmap_zalloc() ACPI/nfit: Adjust annotation for why return 0 if fail to find NFIT at start libnvdimm, bus: Check id immediately following ida_simple_get ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/key.h3
-rw-r--r--include/linux/libnvdimm.h76
2 files changed, 74 insertions, 5 deletions
diff --git a/include/linux/key.h b/include/linux/key.h
index e58ee10f6e58..7099985e35a9 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -346,6 +346,9 @@ static inline key_serial_t key_serial(const struct key *key)
extern void key_set_timeout(struct key *, unsigned);
+extern key_ref_t lookup_user_key(key_serial_t id, unsigned long flags,
+ key_perm_t perm);
+
/*
* The permissions required on a key that we're looking up.
*/
diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h
index 097072c5a852..5440f11b0907 100644
--- a/include/linux/libnvdimm.h
+++ b/include/linux/libnvdimm.h
@@ -38,6 +38,10 @@ enum {
NDD_UNARMED = 1,
/* locked memory devices should not be accessed */
NDD_LOCKED = 2,
+ /* memory under security wipes should not be accessed */
+ NDD_SECURITY_OVERWRITE = 3,
+ /* tracking whether or not there is a pending device reference */
+ NDD_WORK_PENDING = 4,
/* need to set a limit somewhere, but yes, this is likely overkill */
ND_IOCTL_MAX_BUFLEN = SZ_4M,
@@ -87,7 +91,7 @@ struct nvdimm_bus_descriptor {
ndctl_fn ndctl;
int (*flush_probe)(struct nvdimm_bus_descriptor *nd_desc);
int (*clear_to_send)(struct nvdimm_bus_descriptor *nd_desc,
- struct nvdimm *nvdimm, unsigned int cmd);
+ struct nvdimm *nvdimm, unsigned int cmd, void *data);
};
struct nd_cmd_desc {
@@ -155,6 +159,46 @@ static inline struct nd_blk_region_desc *to_blk_region_desc(
}
+enum nvdimm_security_state {
+ NVDIMM_SECURITY_DISABLED,
+ NVDIMM_SECURITY_UNLOCKED,
+ NVDIMM_SECURITY_LOCKED,
+ NVDIMM_SECURITY_FROZEN,
+ NVDIMM_SECURITY_OVERWRITE,
+};
+
+#define NVDIMM_PASSPHRASE_LEN 32
+#define NVDIMM_KEY_DESC_LEN 22
+
+struct nvdimm_key_data {
+ u8 data[NVDIMM_PASSPHRASE_LEN];
+};
+
+enum nvdimm_passphrase_type {
+ NVDIMM_USER,
+ NVDIMM_MASTER,
+};
+
+struct nvdimm_security_ops {
+ enum nvdimm_security_state (*state)(struct nvdimm *nvdimm,
+ enum nvdimm_passphrase_type pass_type);
+ int (*freeze)(struct nvdimm *nvdimm);
+ int (*change_key)(struct nvdimm *nvdimm,
+ const struct nvdimm_key_data *old_data,
+ const struct nvdimm_key_data *new_data,
+ enum nvdimm_passphrase_type pass_type);
+ int (*unlock)(struct nvdimm *nvdimm,
+ const struct nvdimm_key_data *key_data);
+ int (*disable)(struct nvdimm *nvdimm,
+ const struct nvdimm_key_data *key_data);
+ int (*erase)(struct nvdimm *nvdimm,
+ const struct nvdimm_key_data *key_data,
+ enum nvdimm_passphrase_type pass_type);
+ int (*overwrite)(struct nvdimm *nvdimm,
+ const struct nvdimm_key_data *key_data);
+ int (*query_overwrite)(struct nvdimm *nvdimm);
+};
+
void badrange_init(struct badrange *badrange);
int badrange_add(struct badrange *badrange, u64 addr, u64 length);
void badrange_forget(struct badrange *badrange, phys_addr_t start,
@@ -165,6 +209,7 @@ struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
struct nvdimm_bus_descriptor *nfit_desc);
void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus);
struct nvdimm_bus *to_nvdimm_bus(struct device *dev);
+struct nvdimm_bus *nvdimm_to_bus(struct nvdimm *nvdimm);
struct nvdimm *to_nvdimm(struct device *dev);
struct nd_region *to_nd_region(struct device *dev);
struct device *nd_region_dev(struct nd_region *nd_region);
@@ -175,10 +220,21 @@ const char *nvdimm_name(struct nvdimm *nvdimm);
struct kobject *nvdimm_kobj(struct nvdimm *nvdimm);
unsigned long nvdimm_cmd_mask(struct nvdimm *nvdimm);
void *nvdimm_provider_data(struct nvdimm *nvdimm);
-struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data,
- const struct attribute_group **groups, unsigned long flags,
- unsigned long cmd_mask, int num_flush,
- struct resource *flush_wpq);
+struct nvdimm *__nvdimm_create(struct nvdimm_bus *nvdimm_bus,
+ void *provider_data, const struct attribute_group **groups,
+ unsigned long flags, unsigned long cmd_mask, int num_flush,
+ struct resource *flush_wpq, const char *dimm_id,
+ const struct nvdimm_security_ops *sec_ops);
+static inline struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus,
+ void *provider_data, const struct attribute_group **groups,
+ unsigned long flags, unsigned long cmd_mask, int num_flush,
+ struct resource *flush_wpq)
+{
+ return __nvdimm_create(nvdimm_bus, provider_data, groups, flags,
+ cmd_mask, num_flush, flush_wpq, NULL, NULL);
+}
+
+int nvdimm_security_setup_events(struct nvdimm *nvdimm);
const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd);
const struct nd_cmd_desc *nd_cmd_bus_desc(int cmd);
u32 nd_cmd_in_size(struct nvdimm *nvdimm, int cmd,
@@ -204,6 +260,16 @@ u64 nd_fletcher64(void *addr, size_t len, bool le);
void nvdimm_flush(struct nd_region *nd_region);
int nvdimm_has_flush(struct nd_region *nd_region);
int nvdimm_has_cache(struct nd_region *nd_region);
+int nvdimm_in_overwrite(struct nvdimm *nvdimm);
+
+static inline int nvdimm_ctl(struct nvdimm *nvdimm, unsigned int cmd, void *buf,
+ unsigned int buf_len, int *cmd_rc)
+{
+ struct nvdimm_bus *nvdimm_bus = nvdimm_to_bus(nvdimm);
+ struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
+
+ return nd_desc->ndctl(nd_desc, nvdimm, cmd, buf, buf_len, cmd_rc);
+}
#ifdef CONFIG_ARCH_HAS_PMEM_API
#define ARCH_MEMREMAP_PMEM MEMREMAP_WB