104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/*************************************************************************
|
|
*
|
|
* tape390.h
|
|
* enables user programs to display messages and control encryption
|
|
* on s390 tape devices
|
|
*
|
|
* Copyright IBM Corp. 2001,2006
|
|
* Author(s): Michael Holzheu <holzheu@de.ibm.com>
|
|
*
|
|
*************************************************************************/
|
|
|
|
#ifndef _TAPE390_H
|
|
#define _TAPE390_H
|
|
|
|
#define TAPE390_DISPLAY _IOW('d', 1, struct display_struct)
|
|
|
|
/*
|
|
* The TAPE390_DISPLAY ioctl calls the Load Display command
|
|
* which transfers 17 bytes of data from the channel to the subsystem:
|
|
* - 1 format control byte, and
|
|
* - two 8-byte messages
|
|
*
|
|
* Format control byte:
|
|
* 0-2: New Message Overlay
|
|
* 3: Alternate Messages
|
|
* 4: Blink Message
|
|
* 5: Display Low/High Message
|
|
* 6: Reserved
|
|
* 7: Automatic Load Request
|
|
*
|
|
*/
|
|
|
|
typedef struct display_struct {
|
|
char cntrl;
|
|
char message1[8];
|
|
char message2[8];
|
|
} display_struct;
|
|
|
|
/*
|
|
* Tape encryption support
|
|
*/
|
|
|
|
struct tape390_crypt_info {
|
|
char capability;
|
|
char status;
|
|
char medium_status;
|
|
} __attribute__ ((packed));
|
|
|
|
|
|
/* Macros for "capable" field */
|
|
#define TAPE390_CRYPT_SUPPORTED_MASK 0x01
|
|
#define TAPE390_CRYPT_SUPPORTED(x) \
|
|
((x.capability & TAPE390_CRYPT_SUPPORTED_MASK))
|
|
|
|
/* Macros for "status" field */
|
|
#define TAPE390_CRYPT_ON_MASK 0x01
|
|
#define TAPE390_CRYPT_ON(x) (((x.status) & TAPE390_CRYPT_ON_MASK))
|
|
|
|
/* Macros for "medium status" field */
|
|
#define TAPE390_MEDIUM_LOADED_MASK 0x01
|
|
#define TAPE390_MEDIUM_ENCRYPTED_MASK 0x02
|
|
#define TAPE390_MEDIUM_ENCRYPTED(x) \
|
|
(((x.medium_status) & TAPE390_MEDIUM_ENCRYPTED_MASK))
|
|
#define TAPE390_MEDIUM_LOADED(x) \
|
|
(((x.medium_status) & TAPE390_MEDIUM_LOADED_MASK))
|
|
|
|
/*
|
|
* The TAPE390_CRYPT_SET ioctl is used to switch on/off encryption.
|
|
* The "encryption_capable" and "tape_status" fields are ignored for this ioctl!
|
|
*/
|
|
#define TAPE390_CRYPT_SET _IOW('d', 2, struct tape390_crypt_info)
|
|
|
|
/*
|
|
* The TAPE390_CRYPT_QUERY ioctl is used to query the encryption state.
|
|
*/
|
|
#define TAPE390_CRYPT_QUERY _IOR('d', 3, struct tape390_crypt_info)
|
|
|
|
/* Values for "kekl1/2_type" and "kekl1/2_type_on_tape" fields */
|
|
#define TAPE390_KEKL_TYPE_NONE 0
|
|
#define TAPE390_KEKL_TYPE_LABEL 1
|
|
#define TAPE390_KEKL_TYPE_HASH 2
|
|
|
|
struct tape390_kekl {
|
|
unsigned char type;
|
|
unsigned char type_on_tape;
|
|
char label[65];
|
|
} __attribute__ ((packed));
|
|
|
|
struct tape390_kekl_pair {
|
|
struct tape390_kekl kekl[2];
|
|
} __attribute__ ((packed));
|
|
|
|
/*
|
|
* The TAPE390_KEKL_SET ioctl is used to set Key Encrypting Key labels.
|
|
*/
|
|
#define TAPE390_KEKL_SET _IOW('d', 4, struct tape390_kekl_pair)
|
|
|
|
/*
|
|
* The TAPE390_KEKL_QUERY ioctl is used to query Key Encrypting Key labels.
|
|
*/
|
|
#define TAPE390_KEKL_QUERY _IOR('d', 5, struct tape390_kekl_pair)
|
|
|
|
#endif
|