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 7.18 (Berkeley) 06/18/92 8 */ 9 10 #include <sys/time.h> 11 #include <ufs/ffs/fs.h> 12 #include <ufs/ufs/dinode.h> 13 #include "saioctl.h" 14 #include "saerrno.h" 15 16 #define UNIX "/vmunix" 17 18 #ifndef NULL 19 #define NULL 0 20 #endif 21 22 /* I/O block */ 23 struct iob { 24 int i_flgs; /* flags (see F_*) */ 25 int i_adapt; /* adapter or bus */ 26 int i_ctlr; /* controller */ 27 int i_unit; /* pseudo device unit */ 28 int i_part; /* disk partition */ 29 daddr_t i_boff; /* block offset on device */ 30 daddr_t i_cyloff; /* cylinder offset on device */ 31 off_t i_offset; /* seek offset in file */ 32 dev_t i_dev; /* associated device */ 33 daddr_t i_bn; /* 1st block # of next read */ 34 char *i_ma; /* memory address of I/O buffer */ 35 int i_cc; /* character count of transfer */ 36 int i_error; /* error # return */ 37 int i_errcnt; /* error count for driver retries */ 38 int i_errblk; /* block # in error for error reporting */ 39 char i_buf[MAXBSIZE];/* I/O buffer */ 40 struct dinode i_ino; /* dinode, if file */ 41 union { /* file system super block info */ 42 struct fs ui_fs; 43 char dummy[SBSIZE]; 44 } i_un; 45 #define i_fs i_un.ui_fs 46 #define i_bus i_adapt 47 }; 48 49 #define SOPEN_MAX 4 50 extern struct iob iob[SOPEN_MAX]; 51 52 /* Codes for sector header word 1 */ 53 #define HDR1_FMT22 0x1000 /* standard 16 bit format */ 54 #define HDR1_OKSCT 0xc000 /* sector ok */ 55 #define HDR1_SSF 0x2000 /* skip sector flag */ 56 57 /* I/O flag values */ 58 #define F_READ 0x0001 /* file opened for reading */ 59 #define F_WRITE 0x0002 /* file opened for writing */ 60 #define F_ALLOC 0x0004 /* buffer allocated */ 61 #define F_FILE 0x0008 /* file instead of device */ 62 #define F_NBSF 0x0010 /* no bad sector forwarding */ 63 #define F_ECCLM 0x0020 /* limit # of bits in ecc correction */ 64 #define F_SSI 0x0040 /* set skip sector inhibit */ 65 #define F_SEVRE 0x0080 /* Severe burnin (no retries, no ECC) */ 66 67 /* I/O types */ 68 #define F_RDDATA 0x0100 /* read data */ 69 #define F_WRDATA 0x0200 /* write data */ 70 #define F_HDR 0x0400 /* include header on next i/o */ 71 #define F_CHECK 0x0800 /* perform check of data read/write */ 72 #define F_HCHECK 0x1000 /* perform check of header and data */ 73 74 #define F_TYPEMASK 0xff00 /* I/O type mask */ 75 76 /* Lseek values */ 77 #define L_SET 0 /* absolute offset */ 78 79 /* Device switch */ 80 struct devsw { 81 char *dv_name; 82 int (*dv_strategy)(); 83 int (*dv_open)(); 84 int (*dv_close)(); 85 int (*dv_ioctl)(); 86 }; 87 88 extern struct devsw devsw[]; /* device array */ 89 extern int ndevs; /* number of elements in devsw[] */ 90 91 #ifdef COMPAT_42 92 /* 93 * Old drive description table. 94 * still used by some drivers for now. 95 */ 96 struct st { 97 short nsect; /* # sectors/track */ 98 short ntrak; /* # tracks/surfaces/heads */ 99 short nspc; /* # sectors/cylinder */ 100 short ncyl; /* # cylinders */ 101 short *off; /* partition offset table (cylinders) */ 102 }; 103 #endif 104