1/* 2 * include/asm-s390/vtoc.h 3 * 4 * This file contains volume label definitions for DASD devices. 5 * 6 * (C) Copyright IBM Corp. 2005 7 * 8 * Author(s): Volker Sameske <sameske@de.ibm.com> 9 * 10 */ 11 12#ifndef _ASM_S390_VTOC_H 13#define _ASM_S390_VTOC_H 14 15#include <linux/types.h> 16 17struct vtoc_ttr 18{ 19 __u16 tt; 20 __u8 r; 21} __attribute__ ((packed)); 22 23struct vtoc_cchhb 24{ 25 __u16 cc; 26 __u16 hh; 27 __u8 b; 28} __attribute__ ((packed)); 29 30struct vtoc_cchh 31{ 32 __u16 cc; 33 __u16 hh; 34} __attribute__ ((packed)); 35 36struct vtoc_labeldate 37{ 38 __u8 year; 39 __u16 day; 40} __attribute__ ((packed)); 41 42struct vtoc_volume_label_cdl 43{ 44 char volkey[4]; /* volume key = volume label */ 45 char vollbl[4]; /* volume label */ 46 char volid[6]; /* volume identifier */ 47 __u8 security; /* security byte */ 48 struct vtoc_cchhb vtoc; /* VTOC address */ 49 char res1[5]; /* reserved */ 50 char cisize[4]; /* CI-size for FBA,... */ 51 /* ...blanks for CKD */ 52 char blkperci[4]; /* no of blocks per CI (FBA), blanks for CKD */ 53 char labperci[4]; /* no of labels per CI (FBA), blanks for CKD */ 54 char res2[4]; /* reserved */ 55 char lvtoc[14]; /* owner code for LVTOC */ 56 char res3[29]; /* reserved */ 57} __attribute__ ((packed)); 58 59struct vtoc_volume_label_ldl { 60 char vollbl[4]; /* volume label */ 61 char volid[6]; /* volume identifier */ 62 char res3[69]; /* reserved */ 63 char ldl_version; /* version number, valid for ldl format */ 64 __u64 formatted_blocks; /* valid when ldl_version >= f2 */ 65} __attribute__ ((packed)); 66 67struct vtoc_extent 68{ 69 __u8 typeind; /* extent type indicator */ 70 __u8 seqno; /* extent sequence number */ 71 struct vtoc_cchh llimit; /* starting point of this extent */ 72 struct vtoc_cchh ulimit; /* ending point of this extent */ 73} __attribute__ ((packed)); 74 75struct vtoc_dev_const 76{ 77 __u16 DS4DSCYL; /* number of logical cyls */ 78 __u16 DS4DSTRK; /* number of tracks in a logical cylinder */ 79 __u16 DS4DEVTK; /* device track length */ 80 __u8 DS4DEVI; /* non-last keyed record overhead */ 81 __u8 DS4DEVL; /* last keyed record overhead */ 82 __u8 DS4DEVK; /* non-keyed record overhead differential */ 83 __u8 DS4DEVFG; /* flag byte */ 84 __u16 DS4DEVTL; /* device tolerance */ 85 __u8 DS4DEVDT; /* number of DSCB's per track */ 86 __u8 DS4DEVDB; /* number of directory blocks per track */ 87} __attribute__ ((packed)); 88 89struct vtoc_format1_label 90{ 91 char DS1DSNAM[44]; /* data set name */ 92 __u8 DS1FMTID; /* format identifier */ 93 char DS1DSSN[6]; /* data set serial number */ 94 __u16 DS1VOLSQ; /* volume sequence number */ 95 struct vtoc_labeldate DS1CREDT; /* creation date: ydd */ 96 struct vtoc_labeldate DS1EXPDT; /* expiration date */ 97 __u8 DS1NOEPV; /* number of extents on volume */ 98 __u8 DS1NOBDB; /* no. of bytes used in last direction blk */ 99 __u8 DS1FLAG1; /* flag 1 */ 100 char DS1SYSCD[13]; /* system code */ 101 struct vtoc_labeldate DS1REFD; /* date last referenced */ 102 __u8 DS1SMSFG; /* system managed storage indicators */ 103 __u8 DS1SCXTF; /* sec. space extension flag byte */ 104 __u16 DS1SCXTV; /* secondary space extension value */ 105 __u8 DS1DSRG1; /* data set organisation byte 1 */ 106 __u8 DS1DSRG2; /* data set organisation byte 2 */ 107 __u8 DS1RECFM; /* record format */ 108 __u8 DS1OPTCD; /* option code */ 109 __u16 DS1BLKL; /* block length */ 110 __u16 DS1LRECL; /* record length */ 111 __u8 DS1KEYL; /* key length */ 112 __u16 DS1RKP; /* relative key position */ 113 __u8 DS1DSIND; /* data set indicators */ 114 __u8 DS1SCAL1; /* secondary allocation flag byte */ 115 char DS1SCAL3[3]; /* secondary allocation quantity */ 116 struct vtoc_ttr DS1LSTAR; /* last used track and block on track */ 117 __u16 DS1TRBAL; /* space remaining on last used track */ 118 __u16 res1; /* reserved */ 119 struct vtoc_extent DS1EXT1; /* first extent description */ 120 struct vtoc_extent DS1EXT2; /* second extent description */ 121 struct vtoc_extent DS1EXT3; /* third extent description */ 122 struct vtoc_cchhb DS1PTRDS; /* possible pointer to f2 or f3 DSCB */ 123} __attribute__ ((packed)); 124 125struct vtoc_format4_label 126{ 127 char DS4KEYCD[44]; /* key code for VTOC labels: 44 times 0x04 */ 128 __u8 DS4IDFMT; /* format identifier */ 129 struct vtoc_cchhb DS4HPCHR; /* highest address of a format 1 DSCB */ 130 __u16 DS4DSREC; /* number of available DSCB's */ 131 struct vtoc_cchh DS4HCCHH; /* CCHH of next available alternate track */ 132 __u16 DS4NOATK; /* number of remaining alternate tracks */ 133 __u8 DS4VTOCI; /* VTOC indicators */ 134 __u8 DS4NOEXT; /* number of extents in VTOC */ 135 __u8 DS4SMSFG; /* system managed storage indicators */ 136 __u8 DS4DEVAC; /* number of alternate cylinders. 137 * Subtract from first two bytes of 138 * DS4DEVSZ to get number of usable 139 * cylinders. can be zero. valid 140 * only if DS4DEVAV on. */ 141 struct vtoc_dev_const DS4DEVCT; /* device constants */ 142 char DS4AMTIM[8]; /* VSAM time stamp */ 143 char DS4AMCAT[3]; /* VSAM catalog indicator */ 144 char DS4R2TIM[8]; /* VSAM volume/catalog match time stamp */ 145 char res1[5]; /* reserved */ 146 char DS4F6PTR[5]; /* pointer to first format 6 DSCB */ 147 struct vtoc_extent DS4VTOCE; /* VTOC extent description */ 148 char res2[10]; /* reserved */ 149 __u8 DS4EFLVL; /* extended free-space management level */ 150 struct vtoc_cchhb DS4EFPTR; /* pointer to extended free-space info */ 151 char res3; /* reserved */ 152 __u32 DS4DCYL; /* number of logical cyls */ 153 char res4[2]; /* reserved */ 154 __u8 DS4DEVF2; /* device flags */ 155 char res5; /* reserved */ 156} __attribute__ ((packed)); 157 158struct vtoc_ds5ext 159{ 160 __u16 t; /* RTA of the first track of free extent */ 161 __u16 fc; /* number of whole cylinders in free ext. */ 162 __u8 ft; /* number of remaining free tracks */ 163} __attribute__ ((packed)); 164 165struct vtoc_format5_label 166{ 167 char DS5KEYID[4]; /* key identifier */ 168 struct vtoc_ds5ext DS5AVEXT; /* first available (free-space) extent. */ 169 struct vtoc_ds5ext DS5EXTAV[7]; /* seven available extents */ 170 __u8 DS5FMTID; /* format identifier */ 171 struct vtoc_ds5ext DS5MAVET[18]; /* eighteen available extents */ 172 struct vtoc_cchhb DS5PTRDS; /* pointer to next format5 DSCB */ 173} __attribute__ ((packed)); 174 175struct vtoc_ds7ext 176{ 177 __u32 a; /* starting RTA value */ 178 __u32 b; /* ending RTA value + 1 */ 179} __attribute__ ((packed)); 180 181struct vtoc_format7_label 182{ 183 char DS7KEYID[4]; /* key identifier */ 184 struct vtoc_ds7ext DS7EXTNT[5]; /* space for 5 extent descriptions */ 185 __u8 DS7FMTID; /* format identifier */ 186 struct vtoc_ds7ext DS7ADEXT[11]; /* space for 11 extent descriptions */ 187 char res1[2]; /* reserved */ 188 struct vtoc_cchhb DS7PTRDS; /* pointer to next FMT7 DSCB */ 189} __attribute__ ((packed)); 190 191struct vtoc_cms_label { 192 __u8 label_id[4]; /* Label identifier */ 193 __u8 vol_id[6]; /* Volid */ 194 __u16 version_id; /* Version identifier */ 195 __u32 block_size; /* Disk block size */ 196 __u32 origin_ptr; /* Disk origin pointer */ 197 __u32 usable_count; /* Number of usable cylinders/blocks */ 198 __u32 formatted_count; /* Maximum number of formatted cylinders/ 199 * blocks */ 200 __u32 block_count; /* Disk size in CMS blocks */ 201 __u32 used_count; /* Number of CMS blocks in use */ 202 __u32 fst_size; /* File Status Table (FST) size */ 203 __u32 fst_count; /* Number of FSTs per CMS block */ 204 __u8 format_date[6]; /* Disk FORMAT date */ 205 __u8 reserved1[2]; 206 __u32 disk_offset; /* Disk offset when reserved*/ 207 __u32 map_block; /* Allocation Map Block with next hole */ 208 __u32 hblk_disp; /* Displacement into HBLK data of next hole */ 209 __u32 user_disp; /* Displacement into user part of Allocation 210 * map */ 211 __u8 reserved2[4]; 212 __u8 segment_name[8]; /* Name of shared segment */ 213} __attribute__ ((packed)); 214 215#endif /* _ASM_S390_VTOC_H */ 216