4.3BSD - /usr/src/sys/stand/saio.h

   1: /*
   2:  * Copyright (c) 1982, 1986 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  *
   6:  *	@(#)saio.h	7.1 (Berkeley) 6/5/86
   7:  */
   8: 
   9: /*
  10:  * Header file for standalone package
  11:  */
  12: 
  13: /*
  14:  * Io block: includes an
  15:  * inode, cells for the use of seek, etc,
  16:  * and a buffer.
  17:  */
  18: struct  iob {
  19:     int i_flgs;     /* see F_ below */
  20:     struct  inode i_ino;    /* inode, if file */
  21:     int i_unit;     /* pseudo device unit */
  22:     daddr_t i_boff;     /* block offset on device */
  23:     daddr_t i_cyloff;   /* cylinder offset on device */
  24:     off_t   i_offset;   /* seek offset in file */
  25:     daddr_t i_bn;       /* 1st block # of next read */
  26:     char    *i_ma;      /* memory address of i/o buffer */
  27:     int i_cc;       /* character count of transfer */
  28:     int i_error;    /* error # return */
  29:     int i_errcnt;   /* error count for driver retries */
  30:     int i_errblk;   /* block # in error for error reporting */
  31:     char    i_buf[MAXBSIZE];/* i/o buffer */
  32:     union {
  33:         struct fs ui_fs;    /* file system super block info */
  34:         char dummy[SBSIZE];
  35:     } i_un;
  36: };
  37: #define i_fs i_un.ui_fs
  38: #define NULL 0
  39: 
  40: #define F_READ      0x1 /* file opened for reading */
  41: #define F_WRITE     0x2 /* file opened for writing */
  42: #define F_ALLOC     0x4 /* buffer allocated */
  43: #define F_FILE      0x8 /* file instead of device */
  44: #define F_NBSF      0x10    /* no bad sector forwarding */
  45: #define F_SSI       0x40    /* set skip sector inhibit */
  46: /* io types */
  47: #define F_RDDATA    0x0100  /* read data */
  48: #define F_WRDATA    0x0200  /* write data */
  49: #define F_HDR       0x0400  /* include header on next i/o */
  50: #define F_CHECK     0x0800  /* perform check of data read/write */
  51: #define F_HCHECK    0x1000  /* perform check of header and data */
  52: 
  53: #define F_TYPEMASK  0xff00
  54: 
  55: /*
  56:  * Device switch.
  57:  */
  58: struct devsw {
  59:     char    *dv_name;
  60:     int (*dv_strategy)();
  61:     int (*dv_open)();
  62:     int (*dv_close)();
  63:     int (*dv_ioctl)();
  64: };
  65: 
  66: struct devsw devsw[];
  67: 
  68: /*
  69:  * Drive description table.
  70:  * Returned from SAIODEVDATA call.
  71:  */
  72: struct st {
  73:     short   nsect;      /* # sectors/track */
  74:     short   ntrak;      /* # tracks/surfaces/heads */
  75:     short   nspc;       /* # sectors/cylinder */
  76:     short   ncyl;       /* # cylinders */
  77:     short   *off;       /* partition offset table (cylinders) */
  78: };
  79: 
  80: /*
  81:  * Request codes. Must be the same a F_XXX above
  82:  */
  83: #define READ    1
  84: #define WRITE   2
  85: 
  86: #define NBUFS   4
  87: 
  88: char    b[NBUFS][MAXBSIZE];
  89: daddr_t blknos[NBUFS];
  90: 
  91: #define NFILES  4
  92: struct  iob iob[NFILES];
  93: 
  94: extern  int errno;  /* just like unix */
  95: 
  96: /* error codes */
  97: #define EBADF   1   /* bad file descriptor */
  98: #define EOFFSET 2   /* relative seek not supported */
  99: #define EDEV    3   /* improper device specification on open */
 100: #define ENXIO   4   /* unknown device specified */
 101: #define EUNIT   5   /* improper unit specification */
 102: #define ESRCH   6   /* directory search for file failed */
 103: #define EIO 7   /* generic error */
 104: #define ECMD    10  /* undefined driver command */
 105: #define EBSE    11  /* bad sector error */
 106: #define EWCK    12  /* write check error */
 107: #define EECC    13  /* uncorrectable ecc error */
 108: #define EHER    14  /* hard error */
 109: 
 110: /* ioctl's -- for disks just now */
 111: #define SAIOHDR     (('d'<<8)|1)    /* next i/o includes header */
 112: #define SAIOCHECK   (('d'<<8)|2)    /* next i/o checks data */
 113: #define SAIOHCHECK  (('d'<<8)|3)    /* next i/o checks header & data */
 114: #define SAIONOBAD   (('d'<<8)|4)    /* inhibit bad sector forwarding */
 115: #define SAIODOBAD   (('d'<<8)|5)    /* enable bad sector forwarding */
 116: #define SAIOECCLIM  (('d'<<8)|6)    /* set limit to ecc correction, bits */
 117: #define SAIORETRIES (('d'<<8)|7)    /* set retry count for unit */
 118: #define SAIODEVDATA (('d'<<8)|8)    /* get device data */
 119: #define SAIOSSI     (('d'<<8)|9)    /* set skip sector inhibit */
 120: #define SAIONOSSI   (('d'<<8)|10)   /* inhibit skip sector handling */
 121: #define SAIOSSDEV   (('d'<<8)|11)   /* is device skip sector type? */
 122: #define SAIODEBUG   (('d'<<8)|12)   /* enable/disable debugging */
 123: #define SAIOGBADINFO    (('d'<<8)|13)   /* get bad-sector table */

Defined variables

Defined struct's

Defined macros

Usage of this include