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