/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * This file contains volume label definitions for DASD devices. * * Copyright IBM Corp. 2005 * * Author(s): Volker Sameske <sameske@de.ibm.com> * */ #ifndef _ASM_S390_VTOC_H #define _ASM_S390_VTOC_H #include <linux/types.h> struct vtoc_ttr { __u16 tt; __u8 r; } __attribute__ ((packed)); struct vtoc_cchhb { __u16 cc; __u16 hh; __u8 b; } __attribute__ ((packed)); struct vtoc_cchh { __u16 cc; __u16 hh; } __attribute__ ((packed)); struct vtoc_labeldate { __u8 year; __u16 day; } __attribute__ ((packed)); struct vtoc_volume_label_cdl { char volkey[4]; /* volume key = volume label */ char vollbl[4]; /* volume label */ char volid[6]; /* volume identifier */ __u8 security; /* security byte */ struct vtoc_cchhb vtoc; /* VTOC address */ char res1[5]; /* reserved */ char cisize[4]; /* CI-size for FBA,... */ /* ...blanks for CKD */ char blkperci[4]; /* no of blocks per CI (FBA), blanks for CKD */ char labperci[4]; /* no of labels per CI (FBA), blanks for CKD */ char res2[4]; /* reserved */ char lvtoc[14]; /* owner code for LVTOC */ char res3[29]; /* reserved */ } __attribute__ ((packed)); struct vtoc_volume_label_ldl { char vollbl[4]; /* volume label */ char volid[6]; /* volume identifier */ char res3[69]; /* reserved */ char ldl_version; /* version number, valid for ldl format */ __u64 formatted_blocks; /* valid when ldl_version >= f2 */ } __attribute__ ((packed)); struct vtoc_extent { __u8 typeind; /* extent type indicator */ __u8 seqno; /* extent sequence number */ struct vtoc_cchh llimit; /* starting point of this extent */ struct vtoc_cchh ulimit; /* ending point of this extent */ } __attribute__ ((packed)); struct vtoc_dev_const { __u16 DS4DSCYL; /* number of logical cyls */ __u16 DS4DSTRK; /* number of tracks in a logical cylinder */ __u16 DS4DEVTK; /* device track length */ __u8 DS4DEVI; /* non-last keyed record overhead */ __u8 DS4DEVL; /* last keyed record overhead */ __u8 DS4DEVK; /* non-keyed record overhead differential */ __u8 DS4DEVFG; /* flag byte */ __u16 DS4DEVTL; /* device tolerance */ __u8 DS4DEVDT; /* number of DSCB's per track */ __u8 DS4DEVDB; /* number of directory blocks per track */ } __attribute__ ((packed)); struct vtoc_format1_label { char DS1DSNAM[44]; /* data set name */ __u8 DS1FMTID; /* format identifier */ char DS1DSSN[6]; /* data set serial number */ __u16 DS1VOLSQ; /* volume sequence number */ struct vtoc_labeldate DS1CREDT; /* creation date: ydd */ struct vtoc_labeldate DS1EXPDT; /* expiration date */ __u8 DS1NOEPV; /* number of extents on volume */ __u8 DS1NOBDB; /* no. of bytes used in last direction blk */ __u8 DS1FLAG1; /* flag 1 */ char DS1SYSCD[13]; /* system code */ struct vtoc_labeldate DS1REFD; /* date last referenced */ __u8 DS1SMSFG; /* system managed storage indicators */ __u8 DS1SCXTF; /* sec. space extension flag byte */ __u16 DS1SCXTV; /* secondary space extension value */ __u8 DS1DSRG1; /* data set organisation byte 1 */ __u8 DS1DSRG2; /* data set organisation byte 2 */ __u8 DS1RECFM; /* record format */ __u8 DS1OPTCD; /* option code */ __u16 DS1BLKL; /* block length */ __u16 DS1LRECL; /* record length */ __u8 DS1KEYL; /* key length */ __u16 DS1RKP; /* relative key position */ __u8 DS1DSIND; /* data set indicators */ __u8 DS1SCAL1; /* secondary allocation flag byte */ char DS1SCAL3[3]; /* secondary allocation quantity */ struct vtoc_ttr DS1LSTAR; /* last used track and block on track */ __u16 DS1TRBAL; /* space remaining on last used track */ __u16 res1; /* reserved */ struct vtoc_extent DS1EXT1; /* first extent description */ struct vtoc_extent DS1EXT2; /* second extent description */ struct vtoc_extent DS1EXT3; /* third extent description */ struct vtoc_cchhb DS1PTRDS; /* possible pointer to f2 or f3 DSCB */ } __attribute__ ((packed)); struct vtoc_format4_label { char DS4KEYCD[44]; /* key code for VTOC labels: 44 times 0x04 */ __u8 DS4IDFMT; /* format identifier */ struct vtoc_cchhb DS4HPCHR; /* highest address of a format 1 DSCB */ __u16 DS4DSREC; /* number of available DSCB's */ struct vtoc_cchh DS4HCCHH; /* CCHH of next available alternate track */ __u16 DS4NOATK; /* number of remaining alternate tracks */ __u8 DS4VTOCI; /* VTOC indicators */ __u8 DS4NOEXT; /* number of extents in VTOC */ __u8 DS4SMSFG; /* system managed storage indicators */ __u8 DS4DEVAC; /* number of alternate cylinders. * Subtract from first two bytes of * DS4DEVSZ to get number of usable * cylinders. can be zero. valid * only if DS4DEVAV on. */ struct vtoc_dev_const DS4DEVCT; /* device constants */ char DS4AMTIM[8]; /* VSAM time stamp */ char DS4AMCAT[3]; /* VSAM catalog indicator */ char DS4R2TIM[8]; /* VSAM volume/catalog match time stamp */ char res1[5]; /* reserved */ char DS4F6PTR[5]; /* pointer to first format 6 DSCB */ struct vtoc_extent DS4VTOCE; /* VTOC extent description */ char res2[10]; /* reserved */ __u8 DS4EFLVL; /* extended free-space management level */ struct vtoc_cchhb DS4EFPTR; /* pointer to extended free-space info */ char res3; /* reserved */ __u32 DS4DCYL; /* number of logical cyls */ char res4[2]; /* reserved */ __u8 DS4DEVF2; /* device flags */ char res5; /* reserved */ } __attribute__ ((packed)); struct vtoc_ds5ext { __u16 t; /* RTA of the first track of free extent */ __u16 fc; /* number of whole cylinders in free ext. */ __u8 ft; /* number of remaining free tracks */ } __attribute__ ((packed)); struct vtoc_format5_label { char DS5KEYID[4]; /* key identifier */ struct vtoc_ds5ext DS5AVEXT; /* first available (free-space) extent. */ struct vtoc_ds5ext DS5EXTAV[7]; /* seven available extents */ __u8 DS5FMTID; /* format identifier */ struct vtoc_ds5ext DS5MAVET[18]; /* eighteen available extents */ struct vtoc_cchhb DS5PTRDS; /* pointer to next format5 DSCB */ } __attribute__ ((packed)); struct vtoc_ds7ext { __u32 a; /* starting RTA value */ __u32 b; /* ending RTA value + 1 */ } __attribute__ ((packed)); struct vtoc_format7_label { char DS7KEYID[4]; /* key identifier */ struct vtoc_ds7ext DS7EXTNT[5]; /* space for 5 extent descriptions */ __u8 DS7FMTID; /* format identifier */ struct vtoc_ds7ext DS7ADEXT[11]; /* space for 11 extent descriptions */ char res1[2]; /* reserved */ struct vtoc_cchhb DS7PTRDS; /* pointer to next FMT7 DSCB */ } __attribute__ ((packed)); struct vtoc_cms_label { __u8 label_id[4]; /* Label identifier */ __u8 vol_id[6]; /* Volid */ __u16 version_id; /* Version identifier */ __u32 block_size; /* Disk block size */ __u32 origin_ptr; /* Disk origin pointer */ __u32 usable_count; /* Number of usable cylinders/blocks */ __u32 formatted_count; /* Maximum number of formatted cylinders/ * blocks */ __u32 block_count; /* Disk size in CMS blocks */ __u32 used_count; /* Number of CMS blocks in use */ __u32 fst_size; /* File Status Table (FST) size */ __u32 fst_count; /* Number of FSTs per CMS block */ __u8 format_date[6]; /* Disk FORMAT date */ __u8 reserved1[2]; __u32 disk_offset; /* Disk offset when reserved*/ __u32 map_block; /* Allocation Map Block with next hole */ __u32 hblk_disp; /* Displacement into HBLK data of next hole */ __u32 user_disp; /* Displacement into user part of Allocation * map */ __u8 reserved2[4]; __u8 segment_name[8]; /* Name of shared segment */ } __attribute__ ((packed)); #endif /* _ASM_S390_VTOC_H */
