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1.1 root 1: /*
2: * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution is only permitted until one year after the first shipment
6: * of 4.4BSD by the Regents. Otherwise, redistribution and use in source and
7: * binary forms are permitted provided that: (1) source distributions retain
8: * this entire copyright notice and comment, and (2) distributions including
9: * binaries display the following acknowledgement: This product includes
10: * software developed by the University of California, Berkeley and its
11: * contributors'' in the documentation or other materials provided with the
12: * distribution and in all advertising materials mentioning features or use
13: * of this software. Neither the name of the University nor the names of
14: * its contributors may be used to endorse or promote products derived from
15: * this software without specific prior written permission.
16: * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
17: * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
18: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
19: *
20: * @(#)saio.h 7.3 (Berkeley) 7/1/90
21: */
22:
23: /*
24: * Header file for standalone package
25: */
26:
27: #include <sys/param.h>
28: #include "../ufs/dinode.h"
29: #include "../ufs/fs.h"
30:
31: /*
32: * Io block: includes a
33: * dinode, cells for the use of seek, etc,
34: * and a buffer.
35: */
36: struct iob {
37: int i_flgs; /* see F_ below */
38: struct dinode i_ino; /* dinode, if file */
39: int i_unit; /* pseudo device unit */
40: daddr_t i_boff; /* block offset on device */
41: daddr_t i_cyloff; /* cylinder offset on device */
42: off_t i_offset; /* seek offset in file */
43: dev_t i_dev; /* associated device */
44: daddr_t i_bn; /* 1st block # of next read */
45: char *i_ma; /* memory address of i/o buffer */
46: int i_cc; /* character count of transfer */
47: int i_error; /* error # return */
48: int i_errcnt; /* error count for driver retries */
49: int i_errblk; /* block # in error for error reporting */
50: char i_buf[MAXBSIZE];/* i/o buffer */
51: union {
52: struct fs ui_fs; /* file system super block info */
53: char dummy[SBSIZE];
54: } i_un;
55: };
56: #define i_fs i_un.ui_fs
57: #define NULL 0
58:
59: #define F_READ 0x1 /* file opened for reading */
60: #define F_WRITE 0x2 /* file opened for writing */
61: #define F_ALLOC 0x4 /* buffer allocated */
62: #define F_FILE 0x8 /* file instead of device */
63: #define F_NBSF 0x10 /* no bad sector forwarding */
64: #define F_SSI 0x40 /* set skip sector inhibit */
65: /* io types */
66: #define F_RDDATA 0x0100 /* read data */
67: #define F_WRDATA 0x0200 /* write data */
68: #define F_HDR 0x0400 /* include header on next i/o */
69: #define F_CHECK 0x0800 /* perform check of data read/write */
70: #define F_HCHECK 0x1000 /* perform check of header and data */
71:
72: #define F_TYPEMASK 0xff00
73:
74: /*
75: * Device switch.
76: */
77: struct devsw {
78: char *dv_name;
79: int (*dv_strategy)();
80: int (*dv_open)();
81: int (*dv_close)();
82: int (*dv_ioctl)();
83: };
84:
85: struct devsw devsw[];
86:
87: /*
88: * Drive description table.
89: * Returned from SAIODEVDATA call.
90: */
91: struct st {
92: short nsect; /* # sectors/track */
93: short ntrak; /* # tracks/surfaces/heads */
94: short nspc; /* # sectors/cylinder */
95: short ncyl; /* # cylinders */
96: short *off; /* partition offset table (cylinders) */
97: };
98:
99: /*
100: * Request codes. Must be the same a F_XXX above
101: */
102: #define READ 1
103: #define WRITE 2
104:
105: #define NBUFS 4
106:
107: char b[NBUFS][MAXBSIZE];
108: daddr_t blknos[NBUFS];
109:
110: #define NFILES 4
111: struct iob iob[NFILES];
112:
113: extern int errno; /* just like unix */
114:
115: /* error codes */
116: #define EBADF 1 /* bad file descriptor */
117: #define EOFFSET 2 /* relative seek not supported */
118: #define EDEV 3 /* improper device specification on open */
119: #define ENXIO 4 /* unknown device specified */
120: #define EUNIT 5 /* improper unit specification */
121: #define ESRCH 6 /* directory search for file failed */
122: #define EIO 7 /* generic error */
123: #define ECMD 10 /* undefined driver command */
124: #define EBSE 11 /* bad sector error */
125: #define EWCK 12 /* write check error */
126: #define EECC 13 /* uncorrectable ecc error */
127: #define EHER 14 /* hard error */
128:
129: /* ioctl's -- for disks just now */
130: #define SAIOHDR (('d'<<8)|1) /* next i/o includes header */
131: #define SAIOCHECK (('d'<<8)|2) /* next i/o checks data */
132: #define SAIOHCHECK (('d'<<8)|3) /* next i/o checks header & data */
133: #define SAIONOBAD (('d'<<8)|4) /* inhibit bad sector forwarding */
134: #define SAIODOBAD (('d'<<8)|5) /* enable bad sector forwarding */
135: #define SAIOECCLIM (('d'<<8)|6) /* set limit to ecc correction, bits */
136: #define SAIORETRIES (('d'<<8)|7) /* set retry count for unit */
137: #define SAIODEVDATA (('d'<<8)|8) /* get device data */
138: #define SAIOSSI (('d'<<8)|9) /* set skip sector inhibit */
139: #define SAIONOSSI (('d'<<8)|10) /* inhibit skip sector handling */
140: #define SAIOSSDEV (('d'<<8)|11) /* is device skip sector type? */
141: #define SAIODEBUG (('d'<<8)|12) /* enable/disable debugging */
142: #define SAIOGBADINFO (('d'<<8)|13) /* get bad-sector table */
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