Logo Search packages:      
Sourcecode: linux version File versions  Download package

vtoc.h

/*
 * include/asm-s390/vtoc.h
 *
 * This file contains volume label definitions for DASD devices.
 *
 * (C) 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
{
      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_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[9];           /* 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 */

Generated by  Doxygen 1.6.0   Back to index