1 /* 2 * Copyright (c) 1982, 1988 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 * 17 * @(#)saio.h 7.14 (Berkeley) 04/04/90 18 */ 19 20 #include "../ufs/fs.h" 21 #include "../ufs/dinode.h" 22 #include "saioctl.h" 23 #include "saerrno.h" 24 25 #define UNIX "/vmunix" 26 #define NULL 0 27 28 /* 29 * Io block: includes an dinode, cells for the use of seek, etc., 30 * and a buffer. 31 */ 32 struct iob { 33 int i_flgs; /* see F_ below */ 34 int i_adapt; /* adapter or bus */ 35 int i_ctlr; /* controller */ 36 int i_unit; /* pseudo device unit */ 37 int i_part; /* disk partition */ 38 daddr_t i_boff; /* block offset on device */ 39 struct dinode i_ino; /* dinode, if file */ 40 daddr_t i_cyloff; /* cylinder offset on device */ 41 off_t i_offset; /* seek offset in file */ 42 dev_t i_dev; /* associated device */ 43 daddr_t i_bn; /* 1st block # of next read */ 44 char *i_ma; /* memory address of i/o buffer */ 45 int i_cc; /* character count of transfer */ 46 int i_error; /* error # return */ 47 int i_errcnt; /* error count for driver retries */ 48 int i_errblk; /* block # in error for error reporting */ 49 char i_buf[MAXBSIZE];/* i/o buffer */ 50 union { 51 struct fs ui_fs; /* file system super block info */ 52 char dummy[SBSIZE]; 53 } i_un; 54 }; 55 56 #define i_fs i_un.ui_fs 57 #define i_bus i_adapt 58 59 /* codes for sector header word 1 */ 60 #define HDR1_FMT22 0x1000 /* standard 16 bit format */ 61 #define HDR1_OKSCT 0xc000 /* sector ok */ 62 #define HDR1_SSF 0x2000 /* skip sector flag */ 63 64 #define F_READ 0x0001 /* file opened for reading */ 65 #define F_WRITE 0x0002 /* file opened for writing */ 66 #define F_ALLOC 0x0004 /* buffer allocated */ 67 #define F_FILE 0x0008 /* file instead of device */ 68 #define F_NBSF 0x0010 /* no bad sector forwarding */ 69 #define F_ECCLM 0x0020 /* limit # of bits in ecc correction */ 70 #define F_SSI 0x0040 /* set skip sector inhibit */ 71 #define F_SEVRE 0x0080 /* Severe burnin (no retries, no ECC) */ 72 73 /* io types */ 74 #define F_RDDATA 0x0100 /* read data */ 75 #define F_WRDATA 0x0200 /* write data */ 76 #define F_HDR 0x0400 /* include header on next i/o */ 77 #define F_CHECK 0x0800 /* perform check of data read/write */ 78 #define F_HCHECK 0x1000 /* perform check of header and data */ 79 80 #define F_TYPEMASK 0xff00 81 82 #define READ F_READ 83 #define WRITE F_WRITE 84 85 /* 86 * Lseek call. 87 */ 88 #define L_SET 0 /* absolute offset */ 89 90 /* 91 * Device switch. 92 */ 93 struct devsw { 94 char *dv_name; 95 int (*dv_strategy)(); 96 int (*dv_open)(); 97 int (*dv_close)(); 98 int (*dv_ioctl)(); 99 }; 100 101 extern struct devsw devsw[]; /* device array */ 102 extern int ndevs; /* number of elements in devsw[] */ 103 104 #ifdef COMPAT_42 105 /* 106 * Old drive description table. 107 * still used by some drivers for now. 108 */ 109 struct st { 110 short nsect; /* # sectors/track */ 111 short ntrak; /* # tracks/surfaces/heads */ 112 short nspc; /* # sectors/cylinder */ 113 short ncyl; /* # cylinders */ 114 short *off; /* partition offset table (cylinders) */ 115 }; 116 #endif 117 118 #define NFILES 4 119 extern struct iob iob[NFILES]; 120