1 /* 2 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)saio.h 7.1 (Berkeley) 05/08/90 8 */ 9 10 /* 11 * Header file for standalone package 12 */ 13 14 #include "../h/types.h" 15 #include "../h/param.h" 16 #include "../ufs/dinode.h" 17 #include "../ufs/fs.h" 18 19 /* 20 * Io block: includes a 21 * dinode, cells for the use of seek, etc, 22 * and a buffer. 23 */ 24 struct iob { 25 int i_flgs; /* see F_ below */ 26 struct dinode i_ino; /* dinode, if file */ 27 int i_unit; /* pseudo device unit */ 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 daddr_t i_bn; /* 1st block # of next read */ 32 char *i_ma; /* memory address of i/o buffer */ 33 int i_cc; /* character count of transfer */ 34 int i_error; /* error # return */ 35 int i_errcnt; /* error count for driver retries */ 36 int i_errblk; /* block # in error for error reporting */ 37 char i_buf[MAXBSIZE];/* i/o buffer */ 38 union { 39 struct fs ui_fs; /* file system super block info */ 40 char dummy[SBSIZE]; 41 } i_un; 42 }; 43 #define i_fs i_un.ui_fs 44 #define NULL 0 45 46 #define F_READ 0x1 /* file opened for reading */ 47 #define F_WRITE 0x2 /* file opened for writing */ 48 #define F_ALLOC 0x4 /* buffer allocated */ 49 #define F_FILE 0x8 /* file instead of device */ 50 #define F_NBSF 0x10 /* no bad sector forwarding */ 51 #define F_SSI 0x40 /* set skip sector inhibit */ 52 /* io types */ 53 #define F_RDDATA 0x0100 /* read data */ 54 #define F_WRDATA 0x0200 /* write data */ 55 #define F_HDR 0x0400 /* include header on next i/o */ 56 #define F_CHECK 0x0800 /* perform check of data read/write */ 57 #define F_HCHECK 0x1000 /* perform check of header and data */ 58 59 #define F_TYPEMASK 0xff00 60 61 /* 62 * Device switch. 63 */ 64 struct devsw { 65 char *dv_name; 66 int (*dv_strategy)(); 67 int (*dv_open)(); 68 int (*dv_close)(); 69 int (*dv_ioctl)(); 70 }; 71 72 struct devsw devsw[]; 73 74 /* 75 * Drive description table. 76 * Returned from SAIODEVDATA call. 77 */ 78 struct st { 79 short nsect; /* # sectors/track */ 80 short ntrak; /* # tracks/surfaces/heads */ 81 short nspc; /* # sectors/cylinder */ 82 short ncyl; /* # cylinders */ 83 short *off; /* partition offset table (cylinders) */ 84 }; 85 86 /* 87 * Request codes. Must be the same a F_XXX above 88 */ 89 #define READ 1 90 #define WRITE 2 91 92 #define NBUFS 4 93 94 char b[NBUFS][MAXBSIZE]; 95 daddr_t blknos[NBUFS]; 96 97 #define NFILES 4 98 struct iob iob[NFILES]; 99 100 extern int errno; /* just like unix */ 101 102 /* error codes */ 103 #define EBADF 1 /* bad file descriptor */ 104 #define EOFFSET 2 /* relative seek not supported */ 105 #define EDEV 3 /* improper device specification on open */ 106 #define ENXIO 4 /* unknown device specified */ 107 #define EUNIT 5 /* improper unit specification */ 108 #define ESRCH 6 /* directory search for file failed */ 109 #define EIO 7 /* generic error */ 110 #define ECMD 10 /* undefined driver command */ 111 #define EBSE 11 /* bad sector error */ 112 #define EWCK 12 /* write check error */ 113 #define EECC 13 /* uncorrectable ecc error */ 114 #define EHER 14 /* hard error */ 115 116 /* ioctl's -- for disks just now */ 117 #define SAIOHDR (('d'<<8)|1) /* next i/o includes header */ 118 #define SAIOCHECK (('d'<<8)|2) /* next i/o checks data */ 119 #define SAIOHCHECK (('d'<<8)|3) /* next i/o checks header & data */ 120 #define SAIONOBAD (('d'<<8)|4) /* inhibit bad sector forwarding */ 121 #define SAIODOBAD (('d'<<8)|5) /* enable bad sector forwarding */ 122 #define SAIOECCLIM (('d'<<8)|6) /* set limit to ecc correction, bits */ 123 #define SAIORETRIES (('d'<<8)|7) /* set retry count for unit */ 124 #define SAIODEVDATA (('d'<<8)|8) /* get device data */ 125 #define SAIOSSI (('d'<<8)|9) /* set skip sector inhibit */ 126 #define SAIONOSSI (('d'<<8)|10) /* inhibit skip sector handling */ 127 #define SAIOSSDEV (('d'<<8)|11) /* is device skip sector type? */ 128 #define SAIODEBUG (('d'<<8)|12) /* enable/disable debugging */ 129 #define SAIOGBADINFO (('d'<<8)|13) /* get bad-sector table */ 130