Commit | Line | Data |
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da7c5cc6 | 1 | /* |
80c81fbf | 2 | * Copyright (c) 1982 Regents of the University of California. |
da7c5cc6 KM |
3 | * All rights reserved. The Berkeley software License Agreement |
4 | * specifies the terms and conditions for redistribution. | |
5 | * | |
2d5a7199 | 6 | * @(#)saio.h 7.3 (Berkeley) %G% |
da7c5cc6 | 7 | */ |
96dca2cc BJ |
8 | |
9 | /* | |
06397eef | 10 | * Header file for standalone package |
96dca2cc BJ |
11 | */ |
12 | ||
13 | /* | |
06397eef | 14 | * Io block: includes an |
96dca2cc BJ |
15 | * inode, cells for the use of seek, etc, |
16 | * and a buffer. | |
17 | */ | |
18 | struct iob { | |
06397eef SL |
19 | int i_flgs; /* see F_ below */ |
20 | struct inode i_ino; /* inode, if file */ | |
21 | int i_unit; /* pseudo device unit */ | |
22 | daddr_t i_boff; /* block offset on device */ | |
23 | daddr_t i_cyloff; /* cylinder offset on device */ | |
24 | off_t i_offset; /* seek offset in file */ | |
25 | daddr_t i_bn; /* 1st block # of next read */ | |
26 | char *i_ma; /* memory address of i/o buffer */ | |
27 | int i_cc; /* character count of transfer */ | |
28 | int i_error; /* error # return */ | |
29 | int i_errcnt; /* error count for driver retries */ | |
30 | int i_errblk; /* block # in error for error reporting */ | |
31 | char i_buf[MAXBSIZE];/* i/o buffer */ | |
cb31612d | 32 | union { |
06397eef | 33 | struct fs ui_fs; /* file system super block info */ |
cb31612d KM |
34 | char dummy[SBSIZE]; |
35 | } i_un; | |
96dca2cc | 36 | }; |
cb31612d | 37 | #define i_fs i_un.ui_fs |
e184e531 | 38 | #define NULL 0 |
96dca2cc | 39 | |
0839bdeb SL |
40 | #define F_READ 0x1 /* file opened for reading */ |
41 | #define F_WRITE 0x2 /* file opened for writing */ | |
42 | #define F_ALLOC 0x4 /* buffer allocated */ | |
43 | #define F_FILE 0x8 /* file instead of device */ | |
e184e531 | 44 | #define F_NBSF 0x10 /* no bad sector forwarding */ |
e63fbccd | 45 | #define F_SSI 0x40 /* set skip sector inhibit */ |
0839bdeb SL |
46 | /* io types */ |
47 | #define F_RDDATA 0x0100 /* read data */ | |
48 | #define F_WRDATA 0x0200 /* write data */ | |
49 | #define F_HDR 0x0400 /* include header on next i/o */ | |
50 | #define F_CHECK 0x0800 /* perform check of data read/write */ | |
51 | #define F_HCHECK 0x1000 /* perform check of header and data */ | |
52 | ||
53 | #define F_TYPEMASK 0xff00 | |
96dca2cc BJ |
54 | |
55 | /* | |
06397eef | 56 | * Device switch. |
96dca2cc BJ |
57 | */ |
58 | struct devsw { | |
59 | char *dv_name; | |
60 | int (*dv_strategy)(); | |
61 | int (*dv_open)(); | |
62 | int (*dv_close)(); | |
0839bdeb | 63 | int (*dv_ioctl)(); |
96dca2cc BJ |
64 | }; |
65 | ||
66 | struct devsw devsw[]; | |
80c81fbf | 67 | int ndevs; |
e184e531 | 68 | |
96dca2cc | 69 | /* |
06397eef | 70 | * Request codes. Must be the same a F_XXX above |
96dca2cc BJ |
71 | */ |
72 | #define READ 1 | |
73 | #define WRITE 2 | |
74 | ||
75 | #define NBUFS 4 | |
76 | ||
cb31612d | 77 | char b[NBUFS][MAXBSIZE]; |
96dca2cc BJ |
78 | daddr_t blknos[NBUFS]; |
79 | ||
06397eef | 80 | #define NFILES 4 |
96dca2cc | 81 | struct iob iob[NFILES]; |
3d2087b6 | 82 | |
0839bdeb SL |
83 | extern int errno; /* just like unix */ |
84 | ||
85 | /* error codes */ | |
86 | #define EBADF 1 /* bad file descriptor */ | |
87 | #define EOFFSET 2 /* relative seek not supported */ | |
88 | #define EDEV 3 /* improper device specification on open */ | |
89 | #define ENXIO 4 /* unknown device specified */ | |
90 | #define EUNIT 5 /* improper unit specification */ | |
91 | #define ESRCH 6 /* directory search for file failed */ | |
92 | #define EIO 7 /* generic error */ | |
06397eef SL |
93 | #define ECMD 10 /* undefined driver command */ |
94 | #define EBSE 11 /* bad sector error */ | |
95 | #define EWCK 12 /* write check error */ | |
96 | #define EECC 13 /* uncorrectable ecc error */ | |
97 | #define EHER 14 /* hard error */ | |
0839bdeb SL |
98 | |
99 | /* ioctl's -- for disks just now */ | |
e184e531 | 100 | #define SAIOHDR (('d'<<8)|1) /* next i/o includes header */ |
0839bdeb SL |
101 | #define SAIOCHECK (('d'<<8)|2) /* next i/o checks data */ |
102 | #define SAIOHCHECK (('d'<<8)|3) /* next i/o checks header & data */ | |
e184e531 | 103 | #define SAIONOBAD (('d'<<8)|4) /* inhibit bad sector forwarding */ |
e63fbccd | 104 | #define SAIODOBAD (('d'<<8)|5) /* enable bad sector forwarding */ |
f834e141 MK |
105 | #define SAIOECCLIM (('d'<<8)|6) /* set limit to ecc correction, bits */ |
106 | #define SAIORETRIES (('d'<<8)|7) /* set retry count for unit */ | |
80c81fbf | 107 | #define SAIODEVDATA (('d'<<8)|8) /* get pointer to pack label */ |
06397eef SL |
108 | #define SAIOSSI (('d'<<8)|9) /* set skip sector inhibit */ |
109 | #define SAIONOSSI (('d'<<8)|10) /* inhibit skip sector handling */ | |
110 | #define SAIOSSDEV (('d'<<8)|11) /* is device skip sector type? */ | |
111 | #define SAIODEBUG (('d'<<8)|12) /* enable/disable debugging */ | |
f834e141 | 112 | #define SAIOGBADINFO (('d'<<8)|13) /* get bad-sector table */ |