| /* 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 */ |
