/usr/s390x-linux-gnu/include/asm/tape390.h is in linux-libc-dev-s390x-cross 4.15.0-18.19cross1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*************************************************************************
*
* 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
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