/*
* dasd.h
*
* IBM DASD partition table handling.
*
* Mostly taken from drivers/s390/block/dasd.c
*
* Copyright (c) 2005, Hannes Reinecke, SUSE Linux Products GmbH
* Copyright IBM Corporation, 2009
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _DASD_H
#define _DASD_H
typedef struct ttr
{
uint16_t tt;
uint8_t r;
} __attribute__ ((packed)) ttr_t;
typedef struct cchhb
{
uint16_t cc;
uint16_t hh;
uint8_t b;
} __attribute__ ((packed)) cchhb_t;
typedef struct cchh
{
uint16_t cc;
uint16_t hh;
} __attribute__ ((packed)) cchh_t;
typedef struct labeldate
{
uint8_t year;
uint16_t day;
} __attribute__ ((packed)) labeldate_t;
typedef struct volume_label
{
char volkey[4]; /* volume key = volume label */
char vollbl[4]; /* volume label */
char volid[6]; /* volume identifier */
uint8_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 */
uint8_t ldl_version; /* version number, valid for ldl format */
uint64_t formatted_blocks; /* valid when ldl_version >= f2 */
} __attribute__ ((packed, aligned(__alignof__(int)))) volume_label_t;
typedef struct extent
{
uint8_t typeind; /* extent type indicator */
uint8_t seqno; /* extent sequence number */
cchh_t llimit; /* starting point of this extent */
cchh_t ulimit; /* ending point of this extent */
} __attribute__ ((packed)) extent_t;
typedef struct dev_const
{
uint16_t DS4DSCYL; /* number of logical cyls */
uint16_t DS4DSTRK; /* number of tracks in a logical cylinder */
uint16_t DS4DEVTK; /* device track length */
uint8_t DS4DEVI; /* non-last keyed record overhead */
uint8_t DS4DEVL; /* last keyed record overhead */
uint8_t DS4DEVK; /* non-keyed record overhead differential */
uint8_t DS4DEVFG; /* flag byte */
uint16_t DS4DEVTL; /* device tolerance */
uint8_t DS4DEVDT; /* number of DSCB's per track */
uint8_t DS4DEVDB; /* number of directory blocks per track */
} __attribute__ ((packed)) dev_const_t;
typedef struct format1_label
{
char DS1DSNAM[44]; /* data set name */
uint8_t DS1FMTID; /* format identifier */
char DS1DSSN[6]; /* data set serial number */
uint16_t DS1VOLSQ; /* volume sequence number */
labeldate_t DS1CREDT; /* creation date: ydd */
labeldate_t DS1EXPDT; /* expiration date */
uint8_t DS1NOEPV; /* number of extents on volume */
uint8_t DS1NOBDB; /* no. of bytes used in last direction blk */
uint8_t DS1FLAG1; /* flag 1 */
char DS1SYSCD[13]; /* system code */
labeldate_t DS1REFD; /* date last referenced */
uint8_t DS1SMSFG; /* system managed storage indicators */
uint8_t DS1SCXTF; /* sec. space extension flag byte */
uint16_t DS1SCXTV; /* secondary space extension value */
uint8_t DS1DSRG1; /* data set organisation byte 1 */
uint8_t DS1DSRG2; /* data set organisation byte 2 */
uint8_t DS1RECFM; /* record format */
uint8_t DS1OPTCD; /* option code */
uint16_t DS1BLKL; /* block length */
uint16_t DS1LRECL; /* record length */
uint8_t DS1KEYL; /* key length */
uint16_t DS1RKP; /* relative key position */
uint8_t DS1DSIND; /* data set indicators */
uint8_t DS1SCAL1; /* secondary allocation flag byte */
char DS1SCAL3[3]; /* secondary allocation quantity */
ttr_t DS1LSTAR; /* last used track and block on track */
uint16_t DS1TRBAL; /* space remaining on last used track */
uint16_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 */
} __attribute__ ((packed)) format1_label_t;
/*
* struct dasd_information_t
* represents any data about the data, which is visible to userspace
*/
typedef struct dasd_information_t {
unsigned int devno; /* S/390 devno */
unsigned int real_devno; /* for aliases */
unsigned int schid; /* S/390 subchannel identifier */
unsigned int cu_type : 16; /* from SenseID */
unsigned int cu_model : 8; /* from SenseID */
unsigned int dev_type : 16; /* from SenseID */
unsigned int dev_model : 8; /* from SenseID */
unsigned int open_count;
unsigned int req_queue_len;
unsigned int chanq_len; /* length of chanq */
char type[4]; /* from discipline.name, 'none' for unknown */
unsigned int status; /* current device level */
unsigned int label_block; /* where to find the VOLSER */
unsigned int FBA_layout; /* fixed block size (like AIXVOL) */
unsigned int characteristics_size;
unsigned int confdata_size;
char characteristics[64]; /* from read_device_characteristics */
char configuration_data[256]; /* from read_configuration_data */
} dasd_information_t;
#define DASD_IOCTL_LETTER 'D'
#define BIODASDINFO _IOR(DASD_IOCTL_LETTER,1,dasd_information_t)
#define BLKGETSIZE _IO(0x12,96)
#define BLKSSZGET _IO(0x12,104)
#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* device size in bytes (u64 *arg)*/
#define LV_COMPAT_CYL 0xFFFE
/*
* Only compile this on S/390. Doesn't make any sense
* for other architectures.
*/
static unsigned char EBCtoASC[256] =
{
/* 0x00 NUL SOH STX ETX *SEL HT *RNL DEL */
0x00, 0x01, 0x02, 0x03, 0x07, 0x09, 0x07, 0x7F,
/* 0x08 -GE -SPS -RPT VT FF CR SO SI */
0x07, 0x07, 0x07, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
/* 0x10 DLE DC1 DC2 DC3 -RES -NL BS -POC
-ENP ->LF */
0x10, 0x11, 0x12, 0x13, 0x07, 0x0A, 0x08, 0x07,
/* 0x18 CAN EM -UBS -CU1 -IFS -IGS -IRS -ITB
-IUS */
0x18, 0x19, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
/* 0x20 -DS -SOS FS -WUS -BYP LF ETB ESC
-INP */
0x07, 0x07, 0x1C, 0x07, 0x07, 0x0A, 0x17, 0x1B,
/* 0x28 -SA -SFE -SM -CSP -MFA ENQ ACK BEL
-SW */
0x07, 0x07, 0x07, 0x07, 0x07, 0x05, 0x06, 0x07,
/* 0x30 ---- ---- SYN -IR -PP -TRN -NBS EOT */
0x07, 0x07, 0x16, 0x07, 0x07, 0x07, 0x07, 0x04,
/* 0x38 -SBS -IT -RFF -CU3 DC4 NAK ---- SUB */
0x07, 0x07, 0x07, 0x07, 0x14, 0x15, 0x07, 0x1A,
/* 0x40 SP RSP ä ---- */
0x20, 0xFF, 0x83, 0x84, 0x85, 0xA0, 0x07, 0x86,
/* 0x48 . < ( + | */
0x87, 0xA4, 0x9B, 0x2E, 0x3C, 0x28, 0x2B, 0x7C,
/* 0x50 & ---- */
0x26, 0x82, 0x88, 0x89, 0x8A, 0xA1, 0x8C, 0x07,
/* 0x58 ß ! $ * ) ; */
0x8D, 0xE1, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0xAA,
/* 0x60 - / ---- Ä ---- ---- ---- */
0x2D, 0x2F, 0x07, 0x8E, 0x07, 0x07, 0x07, 0x8F,
/* 0x68 ---- , % _ > ? */
0x80, 0xA5, 0x07, 0x2C, 0x25, 0x5F, 0x3E, 0x3F,
/* 0x70 --- ---- ---- ---- ---- ---- ---- */
0x07, 0x90, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
/* 0x78 * ` : # @ ' = " */
0x70, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22,
/* 0x80 * a b c d e f g */
0x07, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
/* 0x88 h i ---- ---- ---- */
0x68, 0x69, 0xAE, 0xAF, 0x07, 0x07, 0x07, 0xF1,
/* 0x90 ° j k l m n o p */
0xF8, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70,
/* 0x98 q r ---- ---- */
0x71, 0x72, 0xA6, 0xA7, 0x91, 0x07, 0x92, 0x07,
/* 0xA0 ~ s t u v w x */
0xE6, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
/* 0xA8 y z ---- ---- ---- ---- */
0x79, 0x7A, 0xAD, 0xAB, 0x07, 0x07, 0x07, 0x07,
/* 0xB0 ^ ---- § ---- */
0x5E, 0x9C, 0x9D, 0xFA, 0x07, 0x07, 0x07, 0xAC,
/* 0xB8 ---- [ ] ---- ---- ---- ---- */
0xAB, 0x07, 0x5B, 0x5D, 0x07, 0x07, 0x07, 0x07,
/* 0xC0 { A B C D E F G */
0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
/* 0xC8 H I ---- ö ---- */
0x48, 0x49, 0x07, 0x93, 0x94, 0x95, 0xA2, 0x07,
/* 0xD0 } J K L M N O P */
0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50,
/* 0xD8 Q R ---- ü */
0x51, 0x52, 0x07, 0x96, 0x81, 0x97, 0xA3, 0x98,
/* 0xE0 \ S T U V W X */
0x5C, 0xF6, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
/* 0xE8 Y Z ---- Ö ---- ---- ---- */
0x59, 0x5A, 0xFD, 0x07, 0x99, 0x07, 0x07, 0x07,
/* 0xF0 0 1 2 3 4 5 6 7 */
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
/* 0xF8 8 9 ---- ---- Ü ---- ---- ---- */
0x38, 0x39, 0x07, 0x07, 0x9A, 0x07, 0x07, 0x07
};
static inline void
vtoc_ebcdic_dec (const char *source, char *target, int l)
{
int i;
for (i = 0; i < l; i++)
target[i]=(char)EBCtoASC[(unsigned char)(source[i])];
}
/*
* compute the block number from a
* cyl-cyl-head-head structure
*/
static inline uint64_t
cchh2blk (cchh_t *ptr, struct hd_geometry *geo)
{
uint64_t cyl;
uint16_t head;
/*decode cylinder and heads for large volumes */
cyl = ptr->hh & 0xFFF0;
cyl <<= 12;
cyl |= ptr->cc;
head = ptr->hh & 0x000F;
return cyl * geo->heads * geo->sectors +
head * geo->sectors;
}
/*
* compute the block number from a
* cyl-cyl-head-head-block structure
*/
static inline uint64_t
cchhb2blk (cchhb_t *ptr, struct hd_geometry *geo)
{
uint64_t cyl;
uint16_t head;
/*decode cylinder and heads for large volumes */
cyl = ptr->hh & 0xFFF0;
cyl <<= 12;
cyl |= ptr->cc;
head = ptr->hh & 0x000F;
return cyl * geo->heads * geo->sectors +
head * geo->sectors +
ptr->b;
}
#endif /* _DASD_H */