123240Smckusick /* 223240Smckusick * Copyright (c) 1982 Regents of the University of California. 323240Smckusick * All rights reserved. The Berkeley software License Agreement 423240Smckusick * specifies the terms and conditions for redistribution. 523240Smckusick * 6*25440Skarels * @(#)saio.h 6.4 (Berkeley) 11/08/85 723240Smckusick */ 8325Sbill 9325Sbill /* 1011363Ssam * Header file for standalone package 11325Sbill */ 12325Sbill 13325Sbill /* 1411363Ssam * Io block: includes an 15325Sbill * inode, cells for the use of seek, etc, 16325Sbill * and a buffer. 17325Sbill */ 18325Sbill struct iob { 1911363Ssam int i_flgs; /* see F_ below */ 2011363Ssam struct inode i_ino; /* inode, if file */ 2111363Ssam int i_unit; /* pseudo device unit */ 2211363Ssam daddr_t i_boff; /* block offset on device */ 2311363Ssam daddr_t i_cyloff; /* cylinder offset on device */ 2411363Ssam off_t i_offset; /* seek offset in file */ 2511363Ssam daddr_t i_bn; /* 1st block # of next read */ 2611363Ssam char *i_ma; /* memory address of i/o buffer */ 2711363Ssam int i_cc; /* character count of transfer */ 2811363Ssam int i_error; /* error # return */ 2911363Ssam int i_errcnt; /* error count for driver retries */ 3011363Ssam int i_errblk; /* block # in error for error reporting */ 3111363Ssam char i_buf[MAXBSIZE];/* i/o buffer */ 326004Smckusic union { 3311363Ssam struct fs ui_fs; /* file system super block info */ 346004Smckusic char dummy[SBSIZE]; 356004Smckusic } i_un; 36325Sbill }; 376004Smckusic #define i_fs i_un.ui_fs 3810333Shelge #define NULL 0 39325Sbill 4010022Ssam #define F_READ 0x1 /* file opened for reading */ 4110022Ssam #define F_WRITE 0x2 /* file opened for writing */ 4210022Ssam #define F_ALLOC 0x4 /* buffer allocated */ 4310022Ssam #define F_FILE 0x8 /* file instead of device */ 4410333Shelge #define F_NBSF 0x10 /* no bad sector forwarding */ 4511139Ssam #define F_SSI 0x40 /* set skip sector inhibit */ 4610022Ssam /* io types */ 4710022Ssam #define F_RDDATA 0x0100 /* read data */ 4810022Ssam #define F_WRDATA 0x0200 /* write data */ 4910022Ssam #define F_HDR 0x0400 /* include header on next i/o */ 5010022Ssam #define F_CHECK 0x0800 /* perform check of data read/write */ 5110022Ssam #define F_HCHECK 0x1000 /* perform check of header and data */ 52325Sbill 5310022Ssam #define F_TYPEMASK 0xff00 5410022Ssam 55325Sbill /* 5611363Ssam * Device switch. 57325Sbill */ 58325Sbill struct devsw { 59325Sbill char *dv_name; 60325Sbill int (*dv_strategy)(); 61325Sbill int (*dv_open)(); 62325Sbill int (*dv_close)(); 6310022Ssam int (*dv_ioctl)(); 64325Sbill }; 65325Sbill 66325Sbill struct devsw devsw[]; 67325Sbill 6811139Ssam /* 6911139Ssam * Drive description table. 7011139Ssam * Returned from SAIODEVDATA call. 7111139Ssam */ 7210351Shelge struct st { 7311139Ssam short nsect; /* # sectors/track */ 7411363Ssam short ntrak; /* # tracks/surfaces/heads */ 7511139Ssam short nspc; /* # sectors/cylinder */ 7611139Ssam short ncyl; /* # cylinders */ 7711139Ssam short *off; /* partition offset table (cylinders) */ 7810333Shelge }; 7910333Shelge 80325Sbill /* 8111363Ssam * Request codes. Must be the same a F_XXX above 82325Sbill */ 83325Sbill #define READ 1 84325Sbill #define WRITE 2 85325Sbill 86325Sbill #define NBUFS 4 87325Sbill 886004Smckusic char b[NBUFS][MAXBSIZE]; 89325Sbill daddr_t blknos[NBUFS]; 90325Sbill 9111363Ssam #define NFILES 4 92325Sbill struct iob iob[NFILES]; 936373Smckusic 9410022Ssam extern int errno; /* just like unix */ 9510022Ssam 9610022Ssam /* error codes */ 9710022Ssam #define EBADF 1 /* bad file descriptor */ 9810022Ssam #define EOFFSET 2 /* relative seek not supported */ 9910022Ssam #define EDEV 3 /* improper device specification on open */ 10010022Ssam #define ENXIO 4 /* unknown device specified */ 10110022Ssam #define EUNIT 5 /* improper unit specification */ 10210022Ssam #define ESRCH 6 /* directory search for file failed */ 10310022Ssam #define EIO 7 /* generic error */ 10411363Ssam #define ECMD 10 /* undefined driver command */ 10511363Ssam #define EBSE 11 /* bad sector error */ 10611363Ssam #define EWCK 12 /* write check error */ 10711363Ssam #define EECC 13 /* uncorrectable ecc error */ 10811363Ssam #define EHER 14 /* hard error */ 10910022Ssam 11010022Ssam /* ioctl's -- for disks just now */ 11110333Shelge #define SAIOHDR (('d'<<8)|1) /* next i/o includes header */ 11210022Ssam #define SAIOCHECK (('d'<<8)|2) /* next i/o checks data */ 11310022Ssam #define SAIOHCHECK (('d'<<8)|3) /* next i/o checks header & data */ 11410333Shelge #define SAIONOBAD (('d'<<8)|4) /* inhibit bad sector forwarding */ 11511139Ssam #define SAIODOBAD (('d'<<8)|5) /* enable bad sector forwarding */ 116*25440Skarels #define SAIOECCLIM (('d'<<8)|6) /* set limit to ecc correction, bits */ 117*25440Skarels #define SAIORETRIES (('d'<<8)|7) /* set retry count for unit */ 11811363Ssam #define SAIODEVDATA (('d'<<8)|8) /* get device data */ 11911363Ssam #define SAIOSSI (('d'<<8)|9) /* set skip sector inhibit */ 12011363Ssam #define SAIONOSSI (('d'<<8)|10) /* inhibit skip sector handling */ 12111363Ssam #define SAIOSSDEV (('d'<<8)|11) /* is device skip sector type? */ 12211363Ssam #define SAIODEBUG (('d'<<8)|12) /* enable/disable debugging */ 123*25440Skarels #define SAIOGBADINFO (('d'<<8)|13) /* get bad-sector table */ 124