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/* 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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Name Type Size Permission Actions
Kbuild File 321 B 0644
auxvec.h File 214 B 0644
bitsperlong.h File 293 B 0644
bpf_perf_event.h File 226 B 0644
byteorder.h File 188 B 0644
chpid.h File 456 B 0644
chsc.h File 2.96 KB 0644
clp.h File 549 B 0644
cmb.h File 1.87 KB 0644
dasd.h File 12.4 KB 0644
debug.h File 857 B 0644
guarded_storage.h File 1.18 KB 0644
hypfs.h File 1.35 KB 0644
ioctls.h File 191 B 0644
ipcbuf.h File 738 B 0644
kvm.h File 7.73 KB 0644
kvm_para.h File 224 B 0644
kvm_perf.h File 474 B 0644
monwriter.h File 939 B 0644
msgbuf.h File 1.14 KB 0644
perf_regs.h File 887 B 0644
pkey.h File 4.35 KB 0644
posix_types.h File 1.4 KB 0644
ptrace.h File 11.39 KB 0644
qeth.h File 3.05 KB 0644
schid.h File 332 B 0644
sclp_ctl.h File 465 B 0644
sembuf.h File 864 B 0644
setup.h File 292 B 0644
shmbuf.h File 1.34 KB 0644
sie.h File 9.25 KB 0644
sigcontext.h File 1.73 KB 0644
siginfo.h File 302 B 0644
signal.h File 3.26 KB 0644
socket.h File 2.24 KB 0644
stat.h File 2.9 KB 0644
statfs.h File 1.03 KB 0644
sthyi.h File 178 B 0644
tape390.h File 2.76 KB 0644
termios.h File 1.14 KB 0644
types.h File 525 B 0644
ucontext.h File 1.18 KB 0644
unistd.h File 12.32 KB 0644
virtio-ccw.h File 444 B 0644
vmcp.h File 737 B 0644
vtoc.h File 7.36 KB 0644
zcrypt.h File 10.94 KB 0644