* Copyright (c) 1982, 1988 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
* @(#)saio.h 7.8 (Berkeley) %G%
* Io block: includes an inode, cells for the use of seek, etc.,
int i_flgs
; /* see F_ below */
int i_adapt
; /* adapter */
int i_ctlr
; /* controller */
int i_unit
; /* pseudo device unit */
int i_part
; /* disk partition */
daddr_t i_boff
; /* block offset on device */
struct inode i_ino
; /* inode, if file */
daddr_t i_cyloff
; /* cylinder offset on device */
off_t i_offset
; /* seek offset in file */
daddr_t i_bn
; /* 1st block # of next read */
char *i_ma
; /* memory address of i/o buffer */
int i_cc
; /* character count of transfer */
int i_error
; /* error # return */
int i_errcnt
; /* error count for driver retries */
int i_errblk
; /* block # in error for error reporting */
char i_buf
[MAXBSIZE
];/* i/o buffer */
struct fs ui_fs
; /* file system super block info */
/* codes for sector header word 1 */
#define HDR1_FMT22 0x1000 /* standard 16 bit format */
#define HDR1_OKSCT 0xc000 /* sector ok */
#define HDR1_SSF 0x2000 /* skip sector flag */
#define F_READ 0x1 /* file opened for reading */
#define F_WRITE 0x2 /* file opened for writing */
#define F_ALLOC 0x4 /* buffer allocated */
#define F_FILE 0x8 /* file instead of device */
#define F_NBSF 0x10 /* no bad sector forwarding */
#define F_ECCLM 0x20 /* limit # of bits in ecc correction */
#define F_SSI 0x40 /* set skip sector inhibit */
#define F_SEVRE 0x80 /* Severe burnin (no retries, no ECC) */
#define F_RDDATA 0x0100 /* read data */
#define F_WRDATA 0x0200 /* write data */
#define F_HDR 0x0400 /* include header on next i/o */
#define F_CHECK 0x0800 /* perform check of data read/write */
#define F_HCHECK 0x1000 /* perform check of header and data */
#define F_TYPEMASK 0xff00
* Request codes. Must be the same as F_XXX above
#define L_SET 0 /* absolute offset */
extern struct devsw devsw
[]; /* device array */
extern int ndevs
; /* number of elements in devsw[] */
* Old drive description table.
* still used by some drivers for now.
short nsect
; /* # sectors/track */
short ntrak
; /* # tracks/surfaces/heads */
short nspc
; /* # sectors/cylinder */
short ncyl
; /* # cylinders */
short *off
; /* partition offset table (cylinders) */
extern struct iob iob
[NFILES
];