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https://github.com/torvalds/linux
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203 lines
6.9 KiB
C
203 lines
6.9 KiB
C
/*
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* include/asm-s390/vtoc.h
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*
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* This file contains volume label definitions for DASD devices.
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*
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* (C) Copyright IBM Corp. 2005
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*
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* Author(s): Volker Sameske <sameske@de.ibm.com>
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*
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*/
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#ifndef _ASM_S390_VTOC_H
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#define _ASM_S390_VTOC_H
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#include <linux/types.h>
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struct vtoc_ttr
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{
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__u16 tt;
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__u8 r;
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} __attribute__ ((packed));
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struct vtoc_cchhb
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{
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__u16 cc;
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__u16 hh;
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__u8 b;
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} __attribute__ ((packed));
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struct vtoc_cchh
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{
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__u16 cc;
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__u16 hh;
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} __attribute__ ((packed));
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struct vtoc_labeldate
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{
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__u8 year;
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__u16 day;
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} __attribute__ ((packed));
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struct vtoc_volume_label
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{
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char volkey[4]; /* volume key = volume label */
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char vollbl[4]; /* volume label */
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char volid[6]; /* volume identifier */
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__u8 security; /* security byte */
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struct vtoc_cchhb vtoc; /* VTOC address */
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char res1[5]; /* reserved */
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char cisize[4]; /* CI-size for FBA,... */
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/* ...blanks for CKD */
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char blkperci[4]; /* no of blocks per CI (FBA), blanks for CKD */
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char labperci[4]; /* no of labels per CI (FBA), blanks for CKD */
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char res2[4]; /* reserved */
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char lvtoc[14]; /* owner code for LVTOC */
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char res3[29]; /* reserved */
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} __attribute__ ((packed));
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struct vtoc_extent
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{
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__u8 typeind; /* extent type indicator */
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__u8 seqno; /* extent sequence number */
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struct vtoc_cchh llimit; /* starting point of this extent */
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struct vtoc_cchh ulimit; /* ending point of this extent */
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} __attribute__ ((packed));
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struct vtoc_dev_const
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{
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__u16 DS4DSCYL; /* number of logical cyls */
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__u16 DS4DSTRK; /* number of tracks in a logical cylinder */
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__u16 DS4DEVTK; /* device track length */
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__u8 DS4DEVI; /* non-last keyed record overhead */
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__u8 DS4DEVL; /* last keyed record overhead */
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__u8 DS4DEVK; /* non-keyed record overhead differential */
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__u8 DS4DEVFG; /* flag byte */
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__u16 DS4DEVTL; /* device tolerance */
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__u8 DS4DEVDT; /* number of DSCB's per track */
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__u8 DS4DEVDB; /* number of directory blocks per track */
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} __attribute__ ((packed));
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struct vtoc_format1_label
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{
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char DS1DSNAM[44]; /* data set name */
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__u8 DS1FMTID; /* format identifier */
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char DS1DSSN[6]; /* data set serial number */
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__u16 DS1VOLSQ; /* volume sequence number */
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struct vtoc_labeldate DS1CREDT; /* creation date: ydd */
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struct vtoc_labeldate DS1EXPDT; /* expiration date */
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__u8 DS1NOEPV; /* number of extents on volume */
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__u8 DS1NOBDB; /* no. of bytes used in last direction blk */
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__u8 DS1FLAG1; /* flag 1 */
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char DS1SYSCD[13]; /* system code */
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struct vtoc_labeldate DS1REFD; /* date last referenced */
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__u8 DS1SMSFG; /* system managed storage indicators */
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__u8 DS1SCXTF; /* sec. space extension flag byte */
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__u16 DS1SCXTV; /* secondary space extension value */
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__u8 DS1DSRG1; /* data set organisation byte 1 */
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__u8 DS1DSRG2; /* data set organisation byte 2 */
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__u8 DS1RECFM; /* record format */
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__u8 DS1OPTCD; /* option code */
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__u16 DS1BLKL; /* block length */
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__u16 DS1LRECL; /* record length */
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__u8 DS1KEYL; /* key length */
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__u16 DS1RKP; /* relative key position */
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__u8 DS1DSIND; /* data set indicators */
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__u8 DS1SCAL1; /* secondary allocation flag byte */
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char DS1SCAL3[3]; /* secondary allocation quantity */
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struct vtoc_ttr DS1LSTAR; /* last used track and block on track */
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__u16 DS1TRBAL; /* space remaining on last used track */
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__u16 res1; /* reserved */
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struct vtoc_extent DS1EXT1; /* first extent description */
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struct vtoc_extent DS1EXT2; /* second extent description */
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struct vtoc_extent DS1EXT3; /* third extent description */
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struct vtoc_cchhb DS1PTRDS; /* possible pointer to f2 or f3 DSCB */
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} __attribute__ ((packed));
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struct vtoc_format4_label
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{
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char DS4KEYCD[44]; /* key code for VTOC labels: 44 times 0x04 */
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__u8 DS4IDFMT; /* format identifier */
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struct vtoc_cchhb DS4HPCHR; /* highest address of a format 1 DSCB */
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__u16 DS4DSREC; /* number of available DSCB's */
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struct vtoc_cchh DS4HCCHH; /* CCHH of next available alternate track */
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__u16 DS4NOATK; /* number of remaining alternate tracks */
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__u8 DS4VTOCI; /* VTOC indicators */
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__u8 DS4NOEXT; /* number of extents in VTOC */
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__u8 DS4SMSFG; /* system managed storage indicators */
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__u8 DS4DEVAC; /* number of alternate cylinders.
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* Subtract from first two bytes of
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* DS4DEVSZ to get number of usable
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* cylinders. can be zero. valid
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* only if DS4DEVAV on. */
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struct vtoc_dev_const DS4DEVCT; /* device constants */
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char DS4AMTIM[8]; /* VSAM time stamp */
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char DS4AMCAT[3]; /* VSAM catalog indicator */
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char DS4R2TIM[8]; /* VSAM volume/catalog match time stamp */
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char res1[5]; /* reserved */
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char DS4F6PTR[5]; /* pointer to first format 6 DSCB */
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struct vtoc_extent DS4VTOCE; /* VTOC extent description */
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char res2[10]; /* reserved */
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__u8 DS4EFLVL; /* extended free-space management level */
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struct vtoc_cchhb DS4EFPTR; /* pointer to extended free-space info */
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char res3[9]; /* reserved */
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} __attribute__ ((packed));
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struct vtoc_ds5ext
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{
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__u16 t; /* RTA of the first track of free extent */
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__u16 fc; /* number of whole cylinders in free ext. */
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__u8 ft; /* number of remaining free tracks */
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} __attribute__ ((packed));
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struct vtoc_format5_label
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{
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char DS5KEYID[4]; /* key identifier */
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struct vtoc_ds5ext DS5AVEXT; /* first available (free-space) extent. */
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struct vtoc_ds5ext DS5EXTAV[7]; /* seven available extents */
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__u8 DS5FMTID; /* format identifier */
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struct vtoc_ds5ext DS5MAVET[18]; /* eighteen available extents */
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struct vtoc_cchhb DS5PTRDS; /* pointer to next format5 DSCB */
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} __attribute__ ((packed));
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struct vtoc_ds7ext
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{
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__u32 a; /* starting RTA value */
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__u32 b; /* ending RTA value + 1 */
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} __attribute__ ((packed));
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struct vtoc_format7_label
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{
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char DS7KEYID[4]; /* key identifier */
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struct vtoc_ds7ext DS7EXTNT[5]; /* space for 5 extent descriptions */
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__u8 DS7FMTID; /* format identifier */
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struct vtoc_ds7ext DS7ADEXT[11]; /* space for 11 extent descriptions */
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char res1[2]; /* reserved */
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struct vtoc_cchhb DS7PTRDS; /* pointer to next FMT7 DSCB */
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} __attribute__ ((packed));
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struct vtoc_cms_label {
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__u8 label_id[4]; /* Label identifier */
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__u8 vol_id[6]; /* Volid */
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__u16 version_id; /* Version identifier */
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__u32 block_size; /* Disk block size */
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__u32 origin_ptr; /* Disk origin pointer */
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__u32 usable_count; /* Number of usable cylinders/blocks */
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__u32 formatted_count; /* Maximum number of formatted cylinders/
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* blocks */
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__u32 block_count; /* Disk size in CMS blocks */
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__u32 used_count; /* Number of CMS blocks in use */
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__u32 fst_size; /* File Status Table (FST) size */
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__u32 fst_count; /* Number of FSTs per CMS block */
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__u8 format_date[6]; /* Disk FORMAT date */
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__u8 reserved1[2];
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__u32 disk_offset; /* Disk offset when reserved*/
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__u32 map_block; /* Allocation Map Block with next hole */
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__u32 hblk_disp; /* Displacement into HBLK data of next hole */
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__u32 user_disp; /* Displacement into user part of Allocation
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* map */
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__u8 reserved2[4];
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__u8 segment_name[8]; /* Name of shared segment */
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} __attribute__ ((packed));
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#endif /* _ASM_S390_VTOC_H */
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