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* File...........: s390-tools/dasdview/vtoc.h
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* Author(s)......: Horst Hummel <horst.hummel@de.ibm.com>
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* Bugreports.to..: <Linux390@de.ibm.com>
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* This is a user-space copy of the kernel vtoc,h.
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* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2002
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* History of changes (starts March 2002)
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#include <sys/ioctl.h>
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#define LINE_LENGTH 80
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#define VTOC_START_CC 0x0
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#define VTOC_START_HH 0x1
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#define FIRST_USABLE_CYL 1
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#define FIRST_USABLE_TRK 2
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#define DASD_3380_TYPE 13148
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#define DASD_3390_TYPE 13200
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#define DASD_9345_TYPE 37701
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#define DASD_3380_VALUE 0xbb60
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#define DASD_3390_VALUE 0xe5a2
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#define DASD_9345_VALUE 0xbc98
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#define VOLSER_LENGTH 6
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#define BIG_DISK_SIZE 0x10000
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typedef struct ttr ttr_t;
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typedef struct cchhb cchhb_t;
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typedef struct cchh cchh_t;
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typedef struct labeldate labeldate_t;
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typedef struct volume_label volume_label_t;
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typedef struct cms_volume_label cms_volume_label_t;
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typedef struct ldl_volume_label ldl_volume_label_t;
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typedef struct extent extent_t;
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typedef struct dev_const dev_const_t;
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typedef struct format1_label format1_label_t;
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typedef struct format4_label format4_label_t;
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typedef struct ds5ext ds5ext_t;
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typedef struct format5_label format5_label_t;
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typedef struct ds7ext ds7ext_t;
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typedef struct format7_label format7_label_t;
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struct __attribute__ ((packed)) ttr {
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struct __attribute__ ((packed)) cchhb {
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struct __attribute__ ((packed)) cchh {
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struct __attribute__ ((packed)) labeldate {
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struct __attribute__ ((packed)) volume_label {
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char volkey[4]; /* volume key = volume label */
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char vollbl[4]; /* volume label ("VOL1" in EBCDIC) */
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char volid[6]; /* volume identifier */
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u_int8_t security; /* security byte */
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cchhb_t 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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char fudge[4]; /* filler to match length of ldl label */
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struct __attribute__ ((packed)) ldl_volume_label {
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char vollbl[4]; /* Label identifier ("LNX1" in EBCDIC) */
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char volid[6]; /* Volume identifier */
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char res3[69]; /* Reserved field */
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char ldl_version[1]; /* Version number, valid for ldl format */
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u_int64_t formatted_blocks; /* valid when ldl_version >= "2" (in
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* z/VM V5R2.0 CMS Planning and Administration
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* What CMS Does / Disk and File Management / Disk File Format
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* http://publib.boulder.ibm.com/infocenter/zvm/v5r4/topic/com.ibm.zvm.v54.dmsd1/hcsg2b1018.htm
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struct __attribute__ ((packed)) cms_volume_label {
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char label_id[4]; /* Label identifier ("CMS1" in EBCDIC) */
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char vol_id[6]; /* Volume identifier */
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char version_id[2]; /* Version identifier ("\0\0") */
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u_int32_t block_size; /* Disk block size (512, 1024, 2048 or 4096) */
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u_int32_t origin_ptr; /* Disk origin pointer (4 or 5) */
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u_int32_t usable_count; /* Number of usable cylinders/blocks */
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u_int32_t formatted_count; /* Max # of formatted cylinders/blocks */
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u_int32_t block_count; /* Disk size in CMS blocks */
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u_int32_t used_count; /* Number of CMS blocks in use */
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u_int32_t fst_size; /* File Status Table (FST) size (64) */
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u_int32_t fst_count; /* Number of FSTs per CMS block */
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char format_date[6]; /* Disk FORMAT date (YYMMDDhhmmss) */
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char reserved1[2]; /* Reserved fields.
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The low-order bit of the first byte is a
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century flag. 0 = 1900s, 1 = 2000s.
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It is used in conjunction with
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"format_date" to determine the
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u_int32_t disk_offset; /* Offset in blocks to the start of the
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reserved file when the disk is reserved.
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This is the number of blocks to skip
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before the partition starts. */
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u_int32_t map_block; /* Allocation map block with next hole */
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u_int32_t hblk_disp; /* Displacement in HBLK data of next hole */
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u_int32_t user_disp; /* Disp into user part of allocation map */
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u_int32_t open_files; /* Count of SFS open files for this ADT.
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open_files is not really part of the
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volume label. It is not used for
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char segment_name[8]; /* Name of the shared segment.
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segment_name is not really part of the
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volume label. It is not stored on disk. */
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struct __attribute__ ((packed)) extent {
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u_int8_t typeind; /* extent type indicator */
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u_int8_t seqno; /* extent sequence number */
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cchh_t llimit; /* starting point of this extent */
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cchh_t ulimit; /* ending point of this extent */
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struct __attribute__ ((packed)) dev_const {
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u_int16_t DS4DSCYL; /* number of logical cyls */
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u_int16_t DS4DSTRK; /* number of tracks in a logical cylinder */
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u_int16_t DS4DEVTK; /* device track length */
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u_int8_t DS4DEVI; /* non-last keyed record overhead */
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u_int8_t DS4DEVL; /* last keyed record overhead */
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u_int8_t DS4DEVK; /* non-keyed record overhead differential */
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u_int8_t DS4DEVFG; /* flag byte */
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u_int16_t DS4DEVTL; /* device tolerance */
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u_int8_t DS4DEVDT; /* number of DSCB's per track */
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u_int8_t DS4DEVDB; /* number of directory blocks per track */
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struct __attribute__ ((packed)) format1_label {
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char DS1DSNAM[44]; /* data set name */
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u_int8_t DS1FMTID; /* format identifier */
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char DS1DSSN[6]; /* data set serial number */
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u_int16_t DS1VOLSQ; /* volume sequence number */
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labeldate_t DS1CREDT; /* creation date: ydd */
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labeldate_t DS1EXPDT; /* expiration date */
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u_int8_t DS1NOEPV; /* number of extents on volume */
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u_int8_t DS1NOBDB; /* no. of bytes used in last direction blk */
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u_int8_t DS1FLAG1; /* flag 1 */
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char DS1SYSCD[13]; /* system code */
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labeldate_t DS1REFD; /* date last referenced */
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u_int8_t DS1SMSFG; /* system managed storage indicators */
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u_int8_t DS1SCXTF; /* sec. space extension flag byte */
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u_int16_t DS1SCXTV; /* secondary space extension value */
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u_int8_t DS1DSRG1; /* data set organisation byte 1 */
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u_int8_t DS1DSRG2; /* data set organisation byte 2 */
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u_int8_t DS1RECFM; /* record format */
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u_int8_t DS1OPTCD; /* option code */
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u_int16_t DS1BLKL; /* block length */
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u_int16_t DS1LRECL; /* record length */
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u_int8_t DS1KEYL; /* key length */
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u_int16_t DS1RKP; /* relative key position */
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u_int8_t DS1DSIND; /* data set indicators */
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u_int8_t DS1SCAL1; /* secondary allocation flag byte */
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char DS1SCAL3[3]; /* secondary allocation quantity */
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ttr_t DS1LSTAR; /* last used track and block on track */
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u_int16_t DS1TRBAL; /* space remaining on last used track */
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u_int16_t res1; /* reserved */
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extent_t DS1EXT1; /* first extent description */
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extent_t DS1EXT2; /* second extent description */
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extent_t DS1EXT3; /* third extent description */
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cchhb_t DS1PTRDS; /* possible pointer to f2 or f3 DSCB */
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struct __attribute__ ((packed)) format4_label {
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char DS4KEYCD[44]; /* key code for VTOC labels: 44 times 0x04 */
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u_int8_t DS4IDFMT; /* format identifier */
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cchhb_t DS4HPCHR; /* highest address of a format 1 DSCB */
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u_int16_t DS4DSREC; /* number of available DSCB's */
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cchh_t DS4HCCHH; /* CCHH of next available alternate track */
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u_int16_t DS4NOATK; /* number of remaining alternate tracks */
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u_int8_t DS4VTOCI; /* VTOC indicators */
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u_int8_t DS4NOEXT; /* number of extents in VTOC */
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u_int8_t DS4SMSFG; /* system managed storage indicators */
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u_int8_t 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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dev_const_t 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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extent_t DS4VTOCE; /* VTOC extent description */
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char res2[10]; /* reserved */
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u_int8_t DS4EFLVL; /* extended free-space management level */
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cchhb_t DS4EFPTR; /* pointer to extended free-space info */
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char res3[9]; /* reserved */
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struct __attribute__ ((packed)) ds5ext {
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u_int16_t t; /* RTA of the first track of free extent */
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u_int16_t fc; /* number of whole cylinders in free ext. */
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u_int8_t ft; /* number of remaining free tracks */
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struct __attribute__ ((packed)) format5_label {
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char DS5KEYID[4]; /* key identifier */
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ds5ext_t DS5AVEXT; /* first available (free-space) extent. */
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ds5ext_t DS5EXTAV[7]; /* seven available extents */
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u_int8_t DS5FMTID; /* format identifier */
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ds5ext_t DS5MAVET[18]; /* eighteen available extents */
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cchhb_t DS5PTRDS; /* pointer to next format5 DSCB */
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struct __attribute__ ((packed)) ds7ext {
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u_int32_t a; /* starting RTA value */
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u_int32_t b; /* ending RTA value + 1 */
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struct __attribute__ ((packed)) format7_label {
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char DS7KEYID[4]; /* key identifier */
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ds7ext_t DS7EXTNT[5]; /* space for 5 extent descriptions */
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u_int8_t DS7FMTID; /* format identifier */
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ds7ext_t DS7ADEXT[11]; /* space for 11 extent descriptions */
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char res1[2]; /* reserved */
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cchhb_t DS7PTRDS; /* pointer to next FMT7 DSCB */
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char *vtoc_ebcdic_enc (char const *source, char *target, int l);
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char *vtoc_ebcdic_dec (char const *source, char *target, int l);
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void vtoc_set_extent (extent_t *ext, u_int8_t typeind, u_int8_t seqno,
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cchh_t *lower, cchh_t *upper);
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void vtoc_set_cchh (cchh_t *addr, u_int16_t cc, u_int16_t hh);
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void vtoc_set_cchhb (cchhb_t *addr, u_int16_t cc, u_int16_t hh, u_int8_t b);
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void vtoc_set_date (labeldate_t *d, u_int8_t year, u_int16_t day);
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void vtoc_volume_label_init (volume_label_t *vlabel);
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int vtoc_read_volume_label (int fd, unsigned long vlabel_start,
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volume_label_t *vlabel);
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int vtoc_write_volume_label (int fd, unsigned long vlabel_start,
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volume_label_t const *vlabel);
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void vtoc_volume_label_set_volser (volume_label_t *vlabel, char const *volser);
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char *vtoc_volume_label_get_volser (volume_label_t *vlabel, char *volser);
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void vtoc_volume_label_set_key (volume_label_t *vlabel, char const *key);
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void vtoc_volume_label_set_label (volume_label_t *vlabel, char const *lbl);
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char *vtoc_volume_label_get_label (volume_label_t *vlabel, char *lbl);
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void vtoc_read_label (int fd, unsigned long position, format1_label_t *f1,
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format4_label_t *f4, format5_label_t *f5,
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format7_label_t *f7);
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void vtoc_write_label (int fd, unsigned long position,
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format1_label_t const *f1,
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format4_label_t const *f4,
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format5_label_t const *f5,
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format7_label_t const *f7);
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void vtoc_init_format1_label (char *volid, unsigned int blksize,
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extent_t *part_extent, format1_label_t *f1);
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void vtoc_init_format4_label (format4_label_t *f4lbl,
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unsigned int usable_partitions,
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unsigned int cylinders,
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unsigned int blksize,
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void vtoc_update_format4_label (format4_label_t *f4, cchhb_t *highest_f1,
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u_int16_t unused_update);
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void vtoc_init_format5_label (format5_label_t *f5);
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void vtoc_update_format5_label_add (format5_label_t *f5, int verbose, int cyl,
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int trk, u_int16_t a, u_int16_t b,
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void vtoc_update_format5_label_del (format5_label_t *f5, int verbose, int cyl,
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int trk, u_int16_t a, u_int16_t b,
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void vtoc_init_format7_label (format7_label_t *f7);
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void vtoc_update_format7_label_add (format7_label_t *f7, int verbose,
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u_int32_t a, u_int32_t b);
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void vtoc_update_format7_label_del (format7_label_t *f7, int verbose,
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u_int32_t a, u_int32_t b);
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void vtoc_set_freespace(format4_label_t *f4, format5_label_t *f5,
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format7_label_t *f7, char ch, int verbose,
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u_int32_t start, u_int32_t stop, int cyl, int trk);
added
removed
include/parted/vtoc.in.h
