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block: Add Sed-opal library

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This patch implements the necessary logic to bring an Opal
enabled drive out of a factory-enabled into a working
Opal state.

This patch set also enables logic to save a password to
be replayed during a resume from suspend.

Signed-off-by: Scott Bauer <scott.bauer@intel.com>
Signed-off-by: Rafael Antognolli <Rafael.Antognolli@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Scott Bauer 2017-02-03 12:50:31 -07:00 committed by Jens Axboe
parent 19641f2d76
commit 455a7b238c
6 changed files with 3074 additions and 0 deletions
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11
MAINTAINERS
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@ -11075,6 +11075,17 @@ L: linux-mmc@vger.kernel.org
S: Maintained
F: drivers/mmc/host/sdhci-spear.c
SECURE ENCRYPTING DEVICE (SED) OPAL DRIVER
M: Scott Bauer <scott.bauer@intel.com>
M: Jonathan Derrick <jonathan.derrick@intel.com>
M: Rafael Antognolli <rafael.antognolli@intel.com>
L: linux-nvme@lists.infradead.org
S: Supported
F: block/sed*
F: block/opal_proto.h
F: include/linux/sed*
F: include/uapi/linux/sed*
SECURITY SUBSYSTEM
M: James Morris <james.l.morris@oracle.com>
M: "Serge E. Hallyn" <serge@hallyn.com>

7
block/Kconfig
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@ -159,6 +159,13 @@ config BLK_DEBUG_FS
Unless you are building a kernel for a tiny system, you should
say Y here.
config BLK_SED_OPAL
bool "Logic for interfacing with Opal enabled SEDs"
---help---
Builds Logic for interfacing with Opal enabled controllers.
Enabling this option enables users to setup/unlock/lock
Locking ranges for SED devices using the Opal protocol.
menu "Partition Types"
source "block/partitions/Kconfig"

1
block/Makefile
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@ -27,3 +27,4 @@ obj-$(CONFIG_BLK_MQ_PCI) += blk-mq-pci.o
obj-$(CONFIG_BLK_DEV_ZONED) += blk-zoned.o
obj-$(CONFIG_BLK_WBT) += blk-wbt.o
obj-$(CONFIG_BLK_DEBUG_FS) += blk-mq-debugfs.o
obj-$(CONFIG_BLK_SED_OPAL) += sed-opal.o

429
block/opal_proto.h Normal file
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@ -0,0 +1,429 @@
/*
* Copyright © 2016 Intel Corporation
*
* Authors:
* Rafael Antognolli <rafael.antognolli@intel.com>
* Scott Bauer <scott.bauer@intel.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#include <linux/types.h>
#ifndef _OPAL_PROTO_H
#define _OPAL_PROTO_H
#define DTAERROR_NO_METHOD_STATUS 0x89
#define GENERIC_HOST_SESSION_NUM 0x41
#define TPER_SYNC_SUPPORTED 0x01
#define TINY_ATOM_DATA_MASK 0x3F
#define TINY_ATOM_SIGNED 0x40
#define SHORT_ATOM_ID 0x80
#define SHORT_ATOM_BYTESTRING 0x20
#define SHORT_ATOM_SIGNED 0x10
#define SHORT_ATOM_LEN_MASK 0xF
#define MEDIUM_ATOM_ID 0xC0
#define MEDIUM_ATOM_BYTESTRING 0x10
#define MEDIUM_ATOM_SIGNED 0x8
#define MEDIUM_ATOM_LEN_MASK 0x7
#define LONG_ATOM_ID 0xe0
#define LONG_ATOM_BYTESTRING 0x2
#define LONG_ATOM_SIGNED 0x1
/* Derived from TCG Core spec 2.01 Section:
* 3.2.2.1
* Data Type
*/
#define TINY_ATOM_BYTE 0x7F
#define SHORT_ATOM_BYTE 0xBF
#define MEDIUM_ATOM_BYTE 0xDF
#define LONG_ATOM_BYTE 0xE3
#define OPAL_INVAL_PARAM 12
#define OPAL_MANUFACTURED_INACTIVE 0x08
#define OPAL_DISCOVERY_COMID 0x0001
#define LOCKING_RANGE_NON_GLOBAL 0x03
/*
* User IDs used in the TCG storage SSCs
* Derived from: TCG_Storage_Architecture_Core_Spec_v2.01_r1.00
* Section: 6.3 Assigned UIDs
*/
#define OPAL_UID_LENGTH 8
#define OPAL_METHOD_LENGTH 8
#define OPAL_MSID_KEYLEN 15
#define OPAL_UID_LENGTH_HALF 4
/* Enum to index OPALUID array */
enum opal_uid {
/* users */
OPAL_SMUID_UID,
OPAL_THISSP_UID,
OPAL_ADMINSP_UID,
OPAL_LOCKINGSP_UID,
OPAL_ENTERPRISE_LOCKINGSP_UID,
OPAL_ANYBODY_UID,
OPAL_SID_UID,
OPAL_ADMIN1_UID,
OPAL_USER1_UID,
OPAL_USER2_UID,
OPAL_PSID_UID,
OPAL_ENTERPRISE_BANDMASTER0_UID,
OPAL_ENTERPRISE_ERASEMASTER_UID,
/* tables */
OPAL_LOCKINGRANGE_GLOBAL,
OPAL_LOCKINGRANGE_ACE_RDLOCKED,
OPAL_LOCKINGRANGE_ACE_WRLOCKED,
OPAL_MBRCONTROL,
OPAL_MBR,
OPAL_AUTHORITY_TABLE,
OPAL_C_PIN_TABLE,
OPAL_LOCKING_INFO_TABLE,
OPAL_ENTERPRISE_LOCKING_INFO_TABLE,
/* C_PIN_TABLE object ID's */
OPAL_C_PIN_MSID,
OPAL_C_PIN_SID,
OPAL_C_PIN_ADMIN1,
/* half UID's (only first 4 bytes used) */
OPAL_HALF_UID_AUTHORITY_OBJ_REF,
OPAL_HALF_UID_BOOLEAN_ACE,
/* omitted optional parameter */
OPAL_UID_HEXFF,
};
#define OPAL_METHOD_LENGTH 8
/* Enum for indexing the OPALMETHOD array */
enum opal_method {
OPAL_PROPERTIES,
OPAL_STARTSESSION,
OPAL_REVERT,
OPAL_ACTIVATE,
OPAL_EGET,
OPAL_ESET,
OPAL_NEXT,
OPAL_EAUTHENTICATE,
OPAL_GETACL,
OPAL_GENKEY,
OPAL_REVERTSP,
OPAL_GET,
OPAL_SET,
OPAL_AUTHENTICATE,
OPAL_RANDOM,
OPAL_ERASE,
};
enum opal_token {
/* Boolean */
OPAL_TRUE = 0x01,
OPAL_FALSE = 0x00,
OPAL_BOOLEAN_EXPR = 0x03,
/* cellblocks */
OPAL_TABLE = 0x00,
OPAL_STARTROW = 0x01,
OPAL_ENDROW = 0x02,
OPAL_STARTCOLUMN = 0x03,
OPAL_ENDCOLUMN = 0x04,
OPAL_VALUES = 0x01,
/* authority table */
OPAL_PIN = 0x03,
/* locking tokens */
OPAL_RANGESTART = 0x03,
OPAL_RANGELENGTH = 0x04,
OPAL_READLOCKENABLED = 0x05,
OPAL_WRITELOCKENABLED = 0x06,
OPAL_READLOCKED = 0x07,
OPAL_WRITELOCKED = 0x08,
OPAL_ACTIVEKEY = 0x0A,
/* locking info table */
OPAL_MAXRANGES = 0x04,
/* mbr control */
OPAL_MBRENABLE = 0x01,
OPAL_MBRDONE = 0x02,
/* properties */
OPAL_HOSTPROPERTIES = 0x00,
/* atoms */
OPAL_STARTLIST = 0xf0,
OPAL_ENDLIST = 0xf1,
OPAL_STARTNAME = 0xf2,
OPAL_ENDNAME = 0xf3,
OPAL_CALL = 0xf8,
OPAL_ENDOFDATA = 0xf9,
OPAL_ENDOFSESSION = 0xfa,
OPAL_STARTTRANSACTON = 0xfb,
OPAL_ENDTRANSACTON = 0xfC,
OPAL_EMPTYATOM = 0xff,
OPAL_WHERE = 0x00,
};
/* Locking state for a locking range */
enum opal_lockingstate {
OPAL_LOCKING_READWRITE = 0x01,
OPAL_LOCKING_READONLY = 0x02,
OPAL_LOCKING_LOCKED = 0x03,
};
/* Packets derived from:
* TCG_Storage_Architecture_Core_Spec_v2.01_r1.00
* Secion: 3.2.3 ComPackets, Packets & Subpackets
*/
/* Comm Packet (header) for transmissions. */
struct opal_compacket {
__be32 reserved0;
u8 extendedComID[4];
__be32 outstandingData;
__be32 minTransfer;
__be32 length;
};
/* Packet structure. */
struct opal_packet {
__be32 tsn;
__be32 hsn;
__be32 seq_number;
__be16 reserved0;
__be16 ack_type;
__be32 acknowledgment;
__be32 length;
};
/* Data sub packet header */
struct opal_data_subpacket {
u8 reserved0[6];
__be16 kind;
__be32 length;
};
/* header of a response */
struct opal_header {
struct opal_compacket cp;
struct opal_packet pkt;
struct opal_data_subpacket subpkt;
};
#define FC_TPER 0x0001
#define FC_LOCKING 0x0002
#define FC_GEOMETRY 0x0003
#define FC_ENTERPRISE 0x0100
#define FC_DATASTORE 0x0202
#define FC_SINGLEUSER 0x0201
#define FC_OPALV100 0x0200
#define FC_OPALV200 0x0203
/*
* The Discovery 0 Header. As defined in
* Opal SSC Documentation
* Section: 3.3.5 Capability Discovery
*/
struct d0_header {
__be32 length; /* the length of the header 48 in 2.00.100 */
__be32 revision; /**< revision of the header 1 in 2.00.100 */
__be32 reserved01;
__be32 reserved02;
/*
* the remainder of the structure is vendor specific and will not be
* addressed now
*/
u8 ignored[32];
};
/*
* TPer Feature Descriptor. Contains flags indicating support for the
* TPer features described in the OPAL specification. The names match the
* OPAL terminology
*
* code == 0x001 in 2.00.100
*/
struct d0_tper_features {
/*
* supported_features bits:
* bit 7: reserved
* bit 6: com ID management
* bit 5: reserved
* bit 4: streaming support
* bit 3: buffer management
* bit 2: ACK/NACK
* bit 1: async
* bit 0: sync
*/
u8 supported_features;
/*
* bytes 5 through 15 are reserved, but we represent the first 3 as
* u8 to keep the other two 32bits integers aligned.
*/
u8 reserved01[3];
__be32 reserved02;
__be32 reserved03;
};
/*
* Locking Feature Descriptor. Contains flags indicating support for the
* locking features described in the OPAL specification. The names match the
* OPAL terminology
*
* code == 0x0002 in 2.00.100
*/
struct d0_locking_features {
/*
* supported_features bits:
* bits 6-7: reserved
* bit 5: MBR done
* bit 4: MBR enabled
* bit 3: media encryption
* bit 2: locked
* bit 1: locking enabled
* bit 0: locking supported
*/
u8 supported_features;
/*
* bytes 5 through 15 are reserved, but we represent the first 3 as
* u8 to keep the other two 32bits integers aligned.
*/
u8 reserved01[3];
__be32 reserved02;
__be32 reserved03;
};
/*
* Geometry Feature Descriptor. Contains flags indicating support for the
* geometry features described in the OPAL specification. The names match the
* OPAL terminology
*
* code == 0x0003 in 2.00.100
*/
struct d0_geometry_features {
/*
* skip 32 bits from header, needed to align the struct to 64 bits.
*/
u8 header[4];
/*
* reserved01:
* bits 1-6: reserved
* bit 0: align
*/
u8 reserved01;
u8 reserved02[7];
__be32 logical_block_size;
__be64 alignment_granularity;
__be64 lowest_aligned_lba;
};
/*
* Enterprise SSC Feature
*
* code == 0x0100
*/
struct d0_enterprise_ssc {
__be16 baseComID;
__be16 numComIDs;
/* range_crossing:
* bits 1-6: reserved
* bit 0: range crossing
*/
u8 range_crossing;
u8 reserved01;
__be16 reserved02;
__be32 reserved03;
__be32 reserved04;
};
/*
* Opal V1 feature
*
* code == 0x0200
*/
struct d0_opal_v100 {
__be16 baseComID;
__be16 numComIDs;
};
/*
* Single User Mode feature
*
* code == 0x0201
*/
struct d0_single_user_mode {
__be32 num_locking_objects;
/* reserved01:
* bit 0: any
* bit 1: all
* bit 2: policy
* bits 3-7: reserved
*/
u8 reserved01;
u8 reserved02;
__be16 reserved03;
__be32 reserved04;
};
/*
* Additonal Datastores feature
*
* code == 0x0202
*/
struct d0_datastore_table {
__be16 reserved01;
__be16 max_tables;
__be32 max_size_tables;
__be32 table_size_alignment;
};
/*
* OPAL 2.0 feature
*
* code == 0x0203
*/
struct d0_opal_v200 {
__be16 baseComID;
__be16 numComIDs;
/* range_crossing:
* bits 1-6: reserved
* bit 0: range crossing
*/
u8 range_crossing;
/* num_locking_admin_auth:
* not aligned to 16 bits, so use two u8.
* stored in big endian:
* 0: MSB
* 1: LSB
*/
u8 num_locking_admin_auth[2];
/* num_locking_user_auth:
* not aligned to 16 bits, so use two u8.
* stored in big endian:
* 0: MSB
* 1: LSB
*/
u8 num_locking_user_auth[2];
u8 initialPIN;
u8 revertedPIN;
u8 reserved01;
__be32 reserved02;
};
/* Union of features used to parse the discovery 0 response */
struct d0_features {
__be16 code;
/*
* r_version bits:
* bits 4-7: version
* bits 0-3: reserved
*/
u8 r_version;
u8 length;
u8 features[];
};
#endif /* _OPAL_PROTO_H */

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block/sed-opal.c Normal file
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include/linux/sed-opal.h Normal file
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@ -0,0 +1,178 @@
/*
* Copyright © 2016 Intel Corporation
*
* Authors:
* Rafael Antognolli <rafael.antognolli@intel.com>
* Scott Bauer <scott.bauer@intel.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#ifndef LINUX_OPAL_H
#define LINUX_OPAL_H
#include <uapi/linux/sed-opal.h>
#include <linux/kernel.h>
/*
* These constant values come from:
* SPC-4 section
* 6.30 SECURITY PROTOCOL IN command / table 265.
*/
enum {
TCG_SECP_00 = 0,
TCG_SECP_01,
};
struct opal_dev;
#define IO_BUFFER_LENGTH 2048
#define MAX_TOKS 64
typedef int (*opal_step)(struct opal_dev *dev);
typedef int (sec_send_recv)(struct opal_dev *ctx, u16 spsp, u8 secp,
void *buffer, size_t len, bool send);
enum opal_atom_width {
OPAL_WIDTH_TINY,
OPAL_WIDTH_SHORT,
OPAL_WIDTH_MEDIUM,
OPAL_WIDTH_LONG,
OPAL_WIDTH_TOKEN
};
/*
* Token defs derived from:
* TCG_Storage_Architecture_Core_Spec_v2.01_r1.00
* 3.2.2 Data Stream Encoding
*/
enum opal_response_token {
OPAL_DTA_TOKENID_BYTESTRING = 0xe0,
OPAL_DTA_TOKENID_SINT = 0xe1,
OPAL_DTA_TOKENID_UINT = 0xe2,
OPAL_DTA_TOKENID_TOKEN = 0xe3, /* actual token is returned */
OPAL_DTA_TOKENID_INVALID = 0X0
};
/*
* On the parsed response, we don't store again the toks that are already
* stored in the response buffer. Instead, for each token, we just store a
* pointer to the position in the buffer where the token starts, and the size
* of the token in bytes.
*/
struct opal_resp_tok {
const u8 *pos;
size_t len;
enum opal_response_token type;
enum opal_atom_width width;
union {
u64 u;
s64 s;
} stored;
};
/*
* From the response header it's not possible to know how many tokens there are
* on the payload. So we hardcode that the maximum will be MAX_TOKS, and later
* if we start dealing with messages that have more than that, we can increase
* this number. This is done to avoid having to make two passes through the
* response, the first one counting how many tokens we have and the second one
* actually storing the positions.
*/
struct parsed_resp {
int num;
struct opal_resp_tok toks[MAX_TOKS];
};
/**
* struct opal_dev - The structure representing a OPAL enabled SED.
* @supported: Whether or not OPAL is supported on this controller.
* @send_recv: The combined sec_send/sec_recv function pointer.
* @opal_step: A series of opal methods that are necessary to complete a command.
* @func_data: An array of parameters for the opal methods above.
* @state: Describes the current opal_step we're working on.
* @dev_lock: Locks the entire opal_dev structure.
* @parsed: Parsed response from controller.
* @prev_data: Data returned from a method to the controller.
* @unlk_lst: A list of Locking ranges to unlock on this device during a resume.
*/
struct opal_dev {
bool initialized;
bool supported;
sec_send_recv *send_recv;
const opal_step *funcs;
void **func_data;
int state;
struct mutex dev_lock;
u16 comid;
u32 hsn;
u32 tsn;
u64 align;
u64 lowest_lba;
size_t pos;
u8 cmd[IO_BUFFER_LENGTH];
u8 resp[IO_BUFFER_LENGTH];
struct parsed_resp parsed;
size_t prev_d_len;
void *prev_data;
struct list_head unlk_lst;
};
#ifdef CONFIG_BLK_SED_OPAL
bool opal_unlock_from_suspend(struct opal_dev *dev);
void init_opal_dev(struct opal_dev *opal_dev, sec_send_recv *send_recv);
int sed_ioctl(struct opal_dev *dev, unsigned int cmd, unsigned long ptr);
static inline bool is_sed_ioctl(unsigned int cmd)
{
switch (cmd) {
case IOC_OPAL_SAVE:
case IOC_OPAL_LOCK_UNLOCK:
case IOC_OPAL_TAKE_OWNERSHIP:
case IOC_OPAL_ACTIVATE_LSP:
case IOC_OPAL_SET_PW:
case IOC_OPAL_ACTIVATE_USR:
case IOC_OPAL_REVERT_TPR:
case IOC_OPAL_LR_SETUP:
case IOC_OPAL_ADD_USR_TO_LR:
case IOC_OPAL_ENABLE_DISABLE_MBR:
case IOC_OPAL_ERASE_LR:
case IOC_OPAL_SECURE_ERASE_LR:
return true;
}
return false;
}
#else
static inline bool is_sed_ioctl(unsigned int cmd)
{
return false;
}
static inline int sed_ioctl(struct opal_dev *dev, unsigned int cmd,
unsigned long ptr)
{
return 0;
}
static inline bool opal_unlock_from_suspend(struct opal_dev *dev)
{
return false;
}
static inline void init_opal_dev(struct opal_dev *opal_dev,
sec_send_recv *send_recv)
{
opal_dev->supported = false;
opal_dev->initialized = true;
}
#endif /* CONFIG_BLK_SED_OPAL */
#endif /* LINUX_OPAL_H */