1 /*- 2 * Copyright (c) 1982, 1988, 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)saio.h 7.17 (Berkeley) 05/27/92 8 */ 9 10 #include <ufs/ffs/fs.h> 11 #include <ufs/ufs/dinode.h> 12 #include "saioctl.h" 13 #include "saerrno.h" 14 15 #define UNIX "/vmunix" 16 17 #ifndef NULL 18 #define NULL 0 19 #endif 20 21 /* I/O block */ 22 struct iob { 23 int i_flgs; /* flags (see F_*) */ 24 int i_adapt; /* adapter or bus */ 25 int i_ctlr; /* controller */ 26 int i_unit; /* pseudo device unit */ 27 int i_part; /* disk partition */ 28 daddr_t i_boff; /* block offset on device */ 29 daddr_t i_cyloff; /* cylinder offset on device */ 30 off_t i_offset; /* seek offset in file */ 31 dev_t i_dev; /* associated device */ 32 daddr_t i_bn; /* 1st block # of next read */ 33 char *i_ma; /* memory address of I/O buffer */ 34 int i_cc; /* character count of transfer */ 35 int i_error; /* error # return */ 36 int i_errcnt; /* error count for driver retries */ 37 int i_errblk; /* block # in error for error reporting */ 38 char i_buf[MAXBSIZE];/* I/O buffer */ 39 struct dinode i_ino; /* dinode, if file */ 40 union { /* file system super block info */ 41 struct fs ui_fs; 42 char dummy[SBSIZE]; 43 } i_un; 44 #define i_fs i_un.ui_fs 45 #define i_bus i_adapt 46 }; 47 48 #define SOPEN_MAX 4 49 extern struct iob iob[SOPEN_MAX]; 50 51 /* Codes for sector header word 1 */ 52 #define HDR1_FMT22 0x1000 /* standard 16 bit format */ 53 #define HDR1_OKSCT 0xc000 /* sector ok */ 54 #define HDR1_SSF 0x2000 /* skip sector flag */ 55 56 /* I/O flag values */ 57 #define F_READ 0x0001 /* file opened for reading */ 58 #define F_WRITE 0x0002 /* file opened for writing */ 59 #define F_ALLOC 0x0004 /* buffer allocated */ 60 #define F_FILE 0x0008 /* file instead of device */ 61 #define F_NBSF 0x0010 /* no bad sector forwarding */ 62 #define F_ECCLM 0x0020 /* limit # of bits in ecc correction */ 63 #define F_SSI 0x0040 /* set skip sector inhibit */ 64 #define F_SEVRE 0x0080 /* Severe burnin (no retries, no ECC) */ 65 66 /* I/O types */ 67 #define F_RDDATA 0x0100 /* read data */ 68 #define F_WRDATA 0x0200 /* write data */ 69 #define F_HDR 0x0400 /* include header on next i/o */ 70 #define F_CHECK 0x0800 /* perform check of data read/write */ 71 #define F_HCHECK 0x1000 /* perform check of header and data */ 72 73 #define F_TYPEMASK 0xff00 /* I/O type mask */ 74 75 /* Lseek values */ 76 #define L_SET 0 /* absolute offset */ 77 78 /* Device switch */ 79 struct devsw { 80 char *dv_name; 81 int (*dv_strategy)(); 82 int (*dv_open)(); 83 int (*dv_close)(); 84 int (*dv_ioctl)(); 85 }; 86 87 extern struct devsw devsw[]; /* device array */ 88 extern int ndevs; /* number of elements in devsw[] */ 89 90 #ifdef COMPAT_42 91 /* 92 * Old drive description table. 93 * still used by some drivers for now. 94 */ 95 struct st { 96 short nsect; /* # sectors/track */ 97 short ntrak; /* # tracks/surfaces/heads */ 98 short nspc; /* # sectors/cylinder */ 99 short ncyl; /* # cylinders */ 100 short *off; /* partition offset table (cylinders) */ 101 }; 102 #endif 103