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vtoc.in.h
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/*
* File...........: s390-tools/dasdview/vtoc.h
* Author(s)......: Horst Hummel <horst.hummel@de.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
*
* This is a user-space copy of the kernel vtoc,h.
*
* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2002
*
* History of changes (starts March 2002)
* 2002-03-12 initial
*/
#ifndef VTOC_H
#define VTOC_H
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <time.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#define LINE_LENGTH 80
#define VTOC_START_CC 0x0
#define VTOC_START_HH 0x1
#define FIRST_USABLE_CYL 1
#define FIRST_USABLE_TRK 2
#define DASD_3380_TYPE 13148
#define DASD_3390_TYPE 13200
#define DASD_9345_TYPE 37701
#define DASD_3380_VALUE 0xbb60
#define DASD_3390_VALUE 0xe5a2
#define DASD_9345_VALUE 0xbc98
#define VOLSER_LENGTH 6
#define BIG_DISK_SIZE 0x10000
#define LV_COMPAT_CYL 0xFFFE
/*****************************************************************************
* SECTION: Definition from hdreq.h *
*****************************************************************************/
struct fdasd_hd_geometry {
unsigned char heads;
unsigned char sectors;
unsigned short cylinders;
unsigned long start;
};
typedef struct ttr ttr_t;
typedef struct cchhb cchhb_t;
typedef struct cchh cchh_t;
typedef struct labeldate labeldate_t;
typedef struct volume_label volume_label_t;
typedef struct cms_volume_label cms_volume_label_t;
typedef struct extent extent_t;
typedef struct dev_const dev_const_t;
typedef struct format1_label format1_label_t;
typedef struct format4_label format4_label_t;
typedef struct ds5ext ds5ext_t;
typedef struct format5_label format5_label_t;
typedef struct ds7ext ds7ext_t;
typedef struct format7_label format7_label_t;
typedef struct format9_label format9_label_t;
struct __attribute__ ((packed)) ttr {
u_int16_t tt;
u_int8_t r;
};
struct __attribute__ ((packed)) cchhb {
u_int16_t cc;
u_int16_t hh;
u_int8_t b;
};
struct __attribute__ ((packed)) cchh {
u_int16_t cc;
u_int16_t hh;
};
struct __attribute__ ((packed)) labeldate {
u_int8_t year;
u_int16_t day;
};
/*
* The following structure is a merger of the cdl and ldl volume label.
* On an ldl disk there is no key information, so when reading an
* ldl label from disk, the data should be copied at the address of vollbl.
* On the other side, the field ldl_version is reserved in a cdl record
* and the field formatted_blocks exists only for ldl labels. So when
* reading a cdl label from disk, the formatted_blocks field will contain
* arbitrary data.
* This layout may be a bit awkward, but the advantage of having the
* same label type for both disk layout types is bigger than the effort
* for taking a bit of extra care at the fringes.
*/
struct __attribute__ ((packed)) volume_label {
char volkey[4]; /* volume key = volume label */
char vollbl[4]; /* volume label ("VOL1" in EBCDIC) */
char volid[6]; /* volume identifier */
u_int8_t security; /* security byte */
cchhb_t 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[28]; /* reserved */
char ldl_version; /* version number, valid for ldl format */
u_int64_t formatted_blocks; /* valid when ldl_version >= "2" (in
EBCDIC) */
};
/*
* See:
* z/VM V5R2.0 CMS Planning and Administration
* SC24-6078-01
* What CMS Does / Disk and File Management / Disk File Format
* http://publib.boulder.ibm.com/infocenter/zvm/v5r4/topic/com.ibm.zvm.v54.dmsd1/hcsg2b1018.htm
*/
struct __attribute__ ((packed)) cms_volume_label {
char label_id[4]; /* Label identifier ("CMS1" in EBCDIC) */
char vol_id[6]; /* Volume identifier */
char version_id[2]; /* Version identifier ("\0\0") */
u_int32_t block_size; /* Disk block size (512, 1024, 2048 or 4096) */
u_int32_t origin_ptr; /* Disk origin pointer (4 or 5) */
u_int32_t usable_count; /* Number of usable cylinders/blocks */
u_int32_t formatted_count; /* Max # of formatted cylinders/blocks */
u_int32_t block_count; /* Disk size in CMS blocks */
u_int32_t used_count; /* Number of CMS blocks in use */
u_int32_t fst_size; /* File Status Table (FST) size (64) */
u_int32_t fst_count; /* Number of FSTs per CMS block */
char format_date[6]; /* Disk FORMAT date (YYMMDDhhmmss) */
char reserved1[2]; /* Reserved fields.
The low-order bit of the first byte is a
century flag. 0 = 1900s, 1 = 2000s.
It is used in conjunction with
"format_date" to determine the
four-digit year. */
u_int32_t disk_offset; /* Offset in blocks to the start of the
reserved file when the disk is reserved.
This is the number of blocks to skip
before the partition starts. */
u_int32_t map_block; /* Allocation map block with next hole */
u_int32_t hblk_disp; /* Displacement in HBLK data of next hole */
u_int32_t user_disp; /* Disp into user part of allocation map */
u_int32_t open_files; /* Count of SFS open files for this ADT.
open_files is not really part of the
volume label. It is not used for
minidisks. */
char segment_name[8]; /* Name of the shared segment.
segment_name is not really part of the
volume label. It is not stored on disk. */
};
struct __attribute__ ((packed)) extent {
u_int8_t typeind; /* extent type indicator */
u_int8_t seqno; /* extent sequence number */
cchh_t llimit; /* starting point of this extent */
cchh_t ulimit; /* ending point of this extent */
};
struct __attribute__ ((packed)) dev_const {
u_int16_t DS4DSCYL; /* number of logical cyls */
u_int16_t DS4DSTRK; /* number of tracks in a logical cylinder */
u_int16_t DS4DEVTK; /* device track length */
u_int8_t DS4DEVI; /* non-last keyed record overhead */
u_int8_t DS4DEVL; /* last keyed record overhead */
u_int8_t DS4DEVK; /* non-keyed record overhead differential */
u_int8_t DS4DEVFG; /* flag byte */
u_int16_t DS4DEVTL; /* device tolerance */
u_int8_t DS4DEVDT; /* number of DSCB's per track */
u_int8_t DS4DEVDB; /* number of directory blocks per track */
};
/*
* format 1 and format 8 label have the same layout so we use the following
* structure for both.
*/
struct __attribute__ ((packed)) format1_label {
char DS1DSNAM[44]; /* data set name */
u_int8_t DS1FMTID; /* format identifier */
char DS1DSSN[6]; /* data set serial number */
u_int16_t DS1VOLSQ; /* volume sequence number */
labeldate_t DS1CREDT; /* creation date: ydd */
labeldate_t DS1EXPDT; /* expiration date */
u_int8_t DS1NOEPV; /* number of extents on volume */
u_int8_t DS1NOBDB; /* no. of bytes used in last direction blk */
u_int8_t DS1FLAG1; /* flag 1 */
char DS1SYSCD[13]; /* system code */
labeldate_t DS1REFD; /* date last referenced */
u_int8_t DS1SMSFG; /* system managed storage indicators */
u_int8_t DS1SCXTF; /* sec. space extension flag byte */
u_int16_t DS1SCXTV; /* secondary space extension value */
u_int8_t DS1DSRG1; /* data set organisation byte 1 */
u_int8_t DS1DSRG2; /* data set organisation byte 2 */
u_int8_t DS1RECFM; /* record format */
u_int8_t DS1OPTCD; /* option code */
u_int16_t DS1BLKL; /* block length */
u_int16_t DS1LRECL; /* record length */
u_int8_t DS1KEYL; /* key length */
u_int16_t DS1RKP; /* relative key position */
u_int8_t DS1DSIND; /* data set indicators */
u_int8_t DS1SCAL1; /* secondary allocation flag byte */
char DS1SCAL3[3]; /* secondary allocation quantity */
ttr_t DS1LSTAR; /* last used track and block on track */
u_int16_t DS1TRBAL; /* space remaining on last used track */
u_int16_t res1; /* reserved */
extent_t DS1EXT1; /* first extent description */
extent_t DS1EXT2; /* second extent description */
extent_t DS1EXT3; /* third extent description */
cchhb_t DS1PTRDS; /* possible pointer to f2 or f3 DSCB */
};
struct __attribute__ ((packed)) format4_label {
char DS4KEYCD[44]; /* key code for VTOC labels: 44 times 0x04 */
u_int8_t DS4IDFMT; /* format identifier */
cchhb_t DS4HPCHR; /* highest address of a format 1 DSCB */
u_int16_t DS4DSREC; /* number of available DSCB's */
cchh_t DS4HCCHH; /* CCHH of next available alternate track */
u_int16_t DS4NOATK; /* number of remaining alternate tracks */
u_int8_t DS4VTOCI; /* VTOC indicators */
u_int8_t DS4NOEXT; /* number of extents in VTOC */
u_int8_t DS4SMSFG; /* system managed storage indicators */
u_int8_t 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. */
dev_const_t DS4DEVCT; /* device constants */
char DS4AMTIM[8]; /* VSAM timestamp */
char DS4AMCAT[3]; /* VSAM catalog indicator */
char DS4R2TIM[8]; /* VSAM volume/catalog match timestamp */
char res1[5]; /* reserved */
char DS4F6PTR[5]; /* pointer to first format 6 DSCB */
extent_t DS4VTOCE; /* VTOC extent description */
char res2[10]; /* reserved */
u_int8_t DS4EFLVL; /* extended free-space management level */
cchhb_t DS4EFPTR; /* pointer to extended free-space info */
char res3; /* reserved */
u_int32_t DS4DCYL; /* number of logical cyls */
char res4[2]; /* reserved */
u_int8_t DS4DEVF2; /* device flags */
char res5; /* reserved */
};
struct __attribute__ ((packed)) ds5ext {
u_int16_t t; /* RTA of the first track of free extent */
u_int16_t fc; /* number of whole cylinders in free ext. */
u_int8_t ft; /* number of remaining free tracks */
};
struct __attribute__ ((packed)) format5_label {
char DS5KEYID[4]; /* key identifier */
ds5ext_t DS5AVEXT; /* first available (free-space) extent. */
ds5ext_t DS5EXTAV[7]; /* seven available extents */
u_int8_t DS5FMTID; /* format identifier */
ds5ext_t DS5MAVET[18]; /* eighteen available extents */
cchhb_t DS5PTRDS; /* pointer to next format5 DSCB */
};
struct __attribute__ ((packed)) ds7ext {
u_int32_t a; /* starting RTA value */
u_int32_t b; /* ending RTA value + 1 */
};
struct __attribute__ ((packed)) format7_label {
char DS7KEYID[4]; /* key identifier */
ds7ext_t DS7EXTNT[5]; /* space for 5 extent descriptions */
u_int8_t DS7FMTID; /* format identifier */
ds7ext_t DS7ADEXT[11]; /* space for 11 extent descriptions */
char res1[2]; /* reserved */
cchhb_t DS7PTRDS; /* pointer to next FMT7 DSCB */
};
struct __attribute__ ((packed)) format9_label {
u_int8_t DS9KEYID; /* key code for format 9 labels (0x09) */
u_int8_t DS9SUBTY; /* subtype (0x01) */
u_int8_t DS9NUMF9; /* number of F9 datasets */
u_int8_t res1[41]; /* reserved */
u_int8_t DS9FMTID; /* format identifier */
u_int8_t res2[95]; /* reserved */
};
char *vtoc_ebcdic_enc (char const *source, char *target, int l);
char *vtoc_ebcdic_dec (char const *source, char *target, int l);
void vtoc_set_extent (extent_t *ext, u_int8_t typeind, u_int8_t seqno,
cchh_t *lower, cchh_t *upper);
void vtoc_set_cchh (cchh_t *addr, u_int32_t cc, u_int16_t hh);
u_int32_t vtoc_get_cyl_from_cchh(cchh_t *addr);
u_int16_t vtoc_get_head_from_cchh(cchh_t *addr);
void vtoc_set_cchhb (cchhb_t *addr, u_int32_t cc, u_int16_t hh, u_int8_t b);
u_int32_t vtoc_get_cyl_from_cchhb(cchhb_t *addr);
u_int16_t vtoc_get_head_from_cchhb(cchhb_t *addr);
u_int64_t cchhb2blk(cchhb_t *p, struct fdasd_hd_geometry *geo);
u_int64_t cchh2blk (cchh_t *p, struct fdasd_hd_geometry *geo);
u_int32_t cchh2trk (cchh_t *p, struct fdasd_hd_geometry *geo);
void vtoc_set_date (labeldate_t *d, u_int8_t year, u_int16_t day);
void vtoc_volume_label_init (volume_label_t *vlabel);
int vtoc_read_volume_label (int fd, unsigned long vlabel_start,
volume_label_t *vlabel);
int vtoc_write_volume_label (int fd, unsigned long vlabel_start,
volume_label_t const *vlabel);
void vtoc_volume_label_set_volser (volume_label_t *vlabel, char const *volser);
char *vtoc_volume_label_get_volser (volume_label_t *vlabel, char *volser);
void vtoc_volume_label_set_key (volume_label_t *vlabel, char const *key);
void vtoc_volume_label_set_label (volume_label_t *vlabel, char const *lbl);
char *vtoc_volume_label_get_label (volume_label_t *vlabel, char *lbl);
void vtoc_read_label (int fd, unsigned long position, format1_label_t *f1,
format4_label_t *f4, format5_label_t *f5,
format7_label_t *f7);
void vtoc_write_label (int fd, unsigned long position,
format1_label_t const *f1,
format4_label_t const *f4,
format5_label_t const *f5,
format7_label_t const *f7,
format9_label_t const *f9);
void vtoc_init_format1_label (unsigned int blksize,
extent_t *part_extent, format1_label_t *f1);
void vtoc_init_format4_label (format4_label_t *f4lbl,
unsigned int compat_cylinders,
unsigned int real_cylinders,
unsigned int tracks,
unsigned int blocks,
unsigned int blksize,
u_int16_t dev_type);
void vtoc_update_format4_label (format4_label_t *f4, cchhb_t *highest_f1,
u_int16_t unused_update);
void vtoc_init_format5_label (format5_label_t *f5);
void vtoc_update_format5_label_add (format5_label_t *f5, int verbose,
int trk, u_int16_t a, u_int16_t b,
u_int8_t c);
void vtoc_update_format5_label_del (format5_label_t *f5, int verbose,
int trk, u_int16_t a, u_int16_t b,
u_int8_t c);
void vtoc_init_format7_label (format7_label_t *f7);
void vtoc_update_format7_label_add (format7_label_t *f7, int verbose,
u_int32_t a, u_int32_t b);
void vtoc_update_format7_label_del (format7_label_t *f7, int verbose,
u_int32_t a, u_int32_t b);
void vtoc_init_format8_label (unsigned int blksize,
extent_t *part_extent, format1_label_t *f1);
void vtoc_update_format8_label (cchhb_t *associated_f9, format1_label_t *f8);
void vtoc_init_format9_label (format9_label_t *f9);
void vtoc_set_freespace(format4_label_t *f4, format5_label_t *f5,
format7_label_t *f7, char ch, int verbose,
u_int32_t start, u_int32_t stop, u_int32_t cyl,
u_int32_t trk);
#endif /* VTOC_H */
start
uint32_t start
Definition dos.c:4
block_count
uint64_t block_count
Definition f2fs.h:10
f1
unsigned char f1
Definition fdasd.h:0
dev_type
unsigned short dev_type
Definition fdasd.h:8
upper
@ upper
Definition fdasd.h:264
lower
@ lower
Definition fdasd.h:264
f5
unsigned char f5
Definition fdasd.h:4
f4
unsigned char f4
Definition fdasd.h:3
reserved1
unsigned char reserved1
Definition fdasd.h:2
cyl
uint16_t cyl
Definition pc98.c:9
fdasd_hd_geometry
Definition vtoc.h:51
fdasd_hd_geometry::sectors
unsigned char sectors
Definition vtoc.h:53
fdasd_hd_geometry::cylinders
unsigned short cylinders
Definition vtoc.h:54
fdasd_hd_geometry::heads
unsigned char heads
Definition vtoc.h:52
volume_label_t
struct volume_label volume_label_t
Definition vtoc.h:63
ds7ext_t
struct ds7ext ds7ext_t
Definition vtoc.h:71
labeldate_t
struct labeldate labeldate_t
Definition vtoc.h:62
format7_label_t
struct format7_label format7_label_t
Definition vtoc.h:72
format4_label_t
struct format4_label format4_label_t
Definition vtoc.h:68
format1_label_t
struct format1_label format1_label_t
Definition vtoc.h:67
cchhb_t
struct cchhb cchhb_t
Definition vtoc.h:60
dev_const_t
struct dev_const dev_const_t
Definition vtoc.h:66
cms_volume_label_t
struct cms_volume_label cms_volume_label_t
Definition vtoc.h:64
format9_label_t
struct format9_label format9_label_t
Definition vtoc.h:73
format5_label_t
struct format5_label format5_label_t
Definition vtoc.h:70
cchh_t
struct cchh cchh_t
Definition vtoc.h:61
ds5ext_t
struct ds5ext ds5ext_t
Definition vtoc.h:69
extent_t
struct extent extent_t
Definition vtoc.h:65
ttr_t
struct ttr ttr_t
Definition vtoc.h:59
cchh2trk
u_int32_t cchh2trk(cchh_t *p, struct fdasd_hd_geometry *geo)
Definition vtoc.c:311
vtoc_init_format1_label
void vtoc_init_format1_label(unsigned int blksize, extent_t *part_extent, format1_label_t *f1)
Definition vtoc.c:793
cchhb2blk
u_int64_t cchhb2blk(cchhb_t *p, struct fdasd_hd_geometry *geo)
Definition vtoc.c:294
vtoc_init_format9_label
void vtoc_init_format9_label(format9_label_t *f9)
Definition vtoc.c:815
vtoc_update_format7_label_del
void vtoc_update_format7_label_del(format7_label_t *f7, int verbose, u_int32_t a, u_int32_t b)
Definition vtoc.c:1212
vtoc_get_head_from_cchhb
u_int16_t vtoc_get_head_from_cchhb(cchhb_t *addr)
Definition vtoc.c:281
vtoc_init_format4_label
void vtoc_init_format4_label(format4_label_t *f4lbl, unsigned int compat_cylinders, unsigned int real_cylinders, unsigned int tracks, unsigned int blocks, unsigned int blksize, u_int16_t dev_type)
Definition vtoc.c:631
vtoc_update_format7_label_add
void vtoc_update_format7_label_add(format7_label_t *f7, int verbose, u_int32_t a, u_int32_t b)
Definition vtoc.c:1131
vtoc_init_format5_label
void vtoc_init_format5_label(format5_label_t *f5)
Definition vtoc.c:708
vtoc_ebcdic_enc
char * vtoc_ebcdic_enc(char const *source, char *target, int l)
Definition vtoc.c:186
vtoc_volume_label_get_label
char * vtoc_volume_label_get_label(volume_label_t *vlabel, char *lbl)
Definition vtoc.c:516
vtoc_get_cyl_from_cchh
u_int32_t vtoc_get_cyl_from_cchh(cchh_t *addr)
Definition vtoc.c:231
vtoc_set_date
void vtoc_set_date(labeldate_t *d, u_int8_t year, u_int16_t day)
Definition vtoc.c:318
vtoc_set_cchhb
void vtoc_set_cchhb(cchhb_t *addr, u_int32_t cc, u_int16_t hh, u_int8_t b)
Definition vtoc.c:258
vtoc_write_volume_label
int vtoc_write_volume_label(int fd, unsigned long vlabel_start, volume_label_t const *vlabel)
Definition vtoc.c:418
vtoc_ebcdic_dec
char * vtoc_ebcdic_dec(char const *source, char *target, int l)
Definition vtoc.c:198
vtoc_write_label
void vtoc_write_label(int fd, unsigned long position, format1_label_t const *f1, format4_label_t const *f4, format5_label_t const *f5, format7_label_t const *f7, format9_label_t const *f9)
Definition vtoc.c:573
vtoc_set_cchh
void vtoc_set_cchh(cchh_t *addr, u_int32_t cc, u_int16_t hh)
Definition vtoc.c:221
vtoc_volume_label_init
void vtoc_volume_label_init(volume_label_t *vlabel)
Definition vtoc.c:329
vtoc_init_format8_label
void vtoc_init_format8_label(unsigned int blksize, extent_t *part_extent, format1_label_t *f1)
Definition vtoc.c:801
vtoc_update_format8_label
void vtoc_update_format8_label(cchhb_t *associated_f9, format1_label_t *f8)
Definition vtoc.c:809
vtoc_get_cyl_from_cchhb
u_int32_t vtoc_get_cyl_from_cchhb(cchhb_t *addr)
Definition vtoc.c:269
vtoc_update_format5_label_del
void vtoc_update_format5_label_del(format5_label_t *f5, int verbose, int trk, u_int16_t a, u_int16_t b, u_int8_t c)
Definition vtoc.c:973
vtoc_set_extent
void vtoc_set_extent(extent_t *ext, u_int8_t typeind, u_int8_t seqno, cchh_t *lower, cchh_t *upper)
Definition vtoc.c:210
cchh2blk
u_int64_t cchh2blk(cchh_t *p, struct fdasd_hd_geometry *geo)
Definition vtoc.c:303
vtoc_init_format7_label
void vtoc_init_format7_label(format7_label_t *f7)
Definition vtoc.c:723
vtoc_set_freespace
void vtoc_set_freespace(format4_label_t *f4, format5_label_t *f5, format7_label_t *f7, char ch, int verbose, u_int32_t start, u_int32_t stop, u_int32_t cyl, u_int32_t trk)
Definition vtoc.c:1289
vtoc_update_format5_label_add
void vtoc_update_format5_label_add(format5_label_t *f5, int verbose, int trk, u_int16_t a, u_int16_t b, u_int8_t c)
Definition vtoc.c:885
vtoc_update_format4_label
void vtoc_update_format4_label(format4_label_t *f4, cchhb_t *highest_f1, u_int16_t unused_update)
Definition vtoc.c:827
vtoc_volume_label_set_key
void vtoc_volume_label_set_key(volume_label_t *vlabel, char const *key)
Definition vtoc.c:484
vtoc_read_label
void vtoc_read_label(int fd, unsigned long position, format1_label_t *f1, format4_label_t *f4, format5_label_t *f5, format7_label_t *f7)
Definition vtoc.c:529
vtoc_volume_label_get_volser
char * vtoc_volume_label_get_volser(volume_label_t *vlabel, char *volser)
Definition vtoc.c:471
vtoc_volume_label_set_volser
void vtoc_volume_label_set_volser(volume_label_t *vlabel, char const *volser)
Definition vtoc.c:442
vtoc_volume_label_set_label
void vtoc_volume_label_set_label(volume_label_t *vlabel, char const *lbl)
Definition vtoc.c:500
vtoc_read_volume_label
int vtoc_read_volume_label(int fd, unsigned long vlabel_start, volume_label_t *vlabel)
Definition vtoc.c:341
vtoc_get_head_from_cchh
u_int16_t vtoc_get_head_from_cchh(cchh_t *addr)
Definition vtoc.c:243