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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 |